drivers/staging/meilhaus/me4600_ao.c

   1 /**
   2  * @file me4600_ao.c
   3  *
   4  * @brief ME-4000 analog output subdevice instance.
   5  * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
   6  * @author Guenter Gebhardt
   7  * @author Krzysztof Gantzke    (k.gantzke@meilhaus.de)
   8  */
   9
  10 /*
  11  * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
  12  *
  13  * This file is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #ifndef __KERNEL__
  29 #  define __KERNEL__
  30 #endif
  31
  32 ///Common part. (For normal and Bosch builds.)
  33
  34 /* Includes
  35  */
  36
  37 #include <linux/module.h>
  38
  39 #include <linux/slab.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/io.h>
  42 #include <linux/uaccess.h>
  43 #include <linux/types.h>
  44 #include <linux/version.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/delay.h>
  47
  48 #include "medefines.h"
  49 #include "meinternal.h"
  50 #include "meerror.h"
  51
  52 #include "medebug.h"
  53 #include "meids.h"
  54 #include "me4600_reg.h"
  55 #include "me4600_ao_reg.h"
  56 #include "me4600_ao.h"
  57
  58 /* Defines
  59  */
  60
  61 static int me4600_ao_query_range_by_min_max(me_subdevice_t *subdevice,
  62                                             int unit,
  63                                             int *min,
  64                                             int *max, int *maxdata, int *range);
  65
  66 static int me4600_ao_query_number_ranges(me_subdevice_t *subdevice,
  67                                          int unit, int *count);
  68
  69 static int me4600_ao_query_range_info(me_subdevice_t *subdevice,
  70                                       int range,
  71                                       int *unit,
  72                                       int *min, int *max, int *maxdata);
  73
  74 static int me4600_ao_query_timer(me_subdevice_t *subdevice,
  75                                  int timer,
  76                                  int *base_frequency,
  77                                  long long *min_ticks, long long *max_ticks);
  78
  79 static int me4600_ao_query_number_channels(me_subdevice_t *subdevice,
  80                                            int *number);
  81
  82 static int me4600_ao_query_subdevice_type(me_subdevice_t *subdevice,
  83                                           int *type, int *subtype);
  84
  85 static int me4600_ao_query_subdevice_caps(me_subdevice_t *subdevice,
  86                                           int *caps);
  87
  88 static int me4600_ao_query_subdevice_caps_args(struct me_subdevice *subdevice,
  89                                                int cap, int *args, int count);
  90
  91 #ifndef BOSCH
  92 /// @note NORMAL BUILD
  93 /// @author Krzysztof Gantzke   (k.gantzke@meilhaus.de)
  94 /* Includes
  95  */
  96
  97 # include <linux/workqueue.h>
  98
  99 /* Defines
 100  */
 101
 102 /** Remove subdevice.
 103 */
 104 static void me4600_ao_destructor(struct me_subdevice *subdevice);
 105
 106 /** Reset subdevice. Stop all actions. Reset registry. Disable FIFO. Set output to 0V and status to 'none'.
 107 */
 108 static int me4600_ao_io_reset_subdevice(me_subdevice_t *subdevice,
 109                                         struct file *filep, int flags);
 110
 111 /** Set output as single
 112 */
 113 static int me4600_ao_io_single_config(me_subdevice_t *subdevice,
 114                                       struct file *filep,
 115                                       int channel,
 116                                       int single_config,
 117                                       int ref,
 118                                       int trig_chan,
 119                                       int trig_type, int trig_edge, int flags);
 120
 121 /** Pass to user actual value of output.
 122 */
 123 static int me4600_ao_io_single_read(me_subdevice_t *subdevice,
 124                                     struct file *filep,
 125                                     int channel,
 126                                     int *value, int time_out, int flags);
 127
 128 /** Write to output requed value.
 129 */
 130 static int me4600_ao_io_single_write(me_subdevice_t *subdevice,
 131                                      struct file *filep,
 132                                      int channel,
 133                                      int value, int time_out, int flags);
 134
 135 /** Set output as streamed device.
 136 */
 137 static int me4600_ao_io_stream_config(me_subdevice_t *subdevice,
 138                                       struct file *filep,
 139                                       meIOStreamConfig_t *config_list,
 140                                       int count,
 141                                       meIOStreamTrigger_t *trigger,
 142                                       int fifo_irq_threshold, int flags);
 143
 144 /** Wait for / Check empty space in buffer.
 145 */
 146 static int me4600_ao_io_stream_new_values(me_subdevice_t *subdevice,
 147                                           struct file *filep,
 148                                           int time_out, int *count, int flags);
 149
 150 /** Start streaming.
 151 */
 152 static int me4600_ao_io_stream_start(me_subdevice_t *subdevice,
 153                                      struct file *filep,
 154                                      int start_mode, int time_out, int flags);
 155
 156 /** Check actual state. / Wait for end.
 157 */
 158 static int me4600_ao_io_stream_status(me_subdevice_t *subdevice,
 159                                       struct file *filep,
 160                                       int wait,
 161                                       int *status, int *values, int flags);
 162
 163 /** Stop streaming.
 164 */
 165 static int me4600_ao_io_stream_stop(me_subdevice_t *subdevice,
 166                                     struct file *filep,
 167                                     int stop_mode, int flags);
 168
 169 /** Write datas to buffor.
 170 */
 171 static int me4600_ao_io_stream_write(me_subdevice_t *subdevice,
 172                                      struct file *filep,
 173                                      int write_mode,
 174                                      int *values, int *count, int flags);
 175
 176 /** Interrupt handler. Copy from buffer to FIFO.
 177 */
 178 static irqreturn_t me4600_ao_isr(int irq, void *dev_id);
 179 /** Copy data from circular buffer to fifo (fast) in wraparound mode.
 180 */
 181 inline int ao_write_data_wraparound(me4600_ao_subdevice_t *instance, int count,
 182                                     int start_pos);
 183
 184 /** Copy data from circular buffer to fifo (fast).
 185 */
 186 inline int ao_write_data(me4600_ao_subdevice_t *instance, int count,
 187                          int start_pos);
 188
 189 /** Copy data from circular buffer to fifo (slow).
 190 */
 191 inline int ao_write_data_pooling(me4600_ao_subdevice_t *instance, int count,
 192                                  int start_pos);
 193
 194 /** Copy data from user space to circular buffer.
 195 */
 196 inline int ao_get_data_from_user(me4600_ao_subdevice_t *instance, int count,
 197                                  int *user_values);
 198
 199 /** Stop presentation. Preserve FIFOs.
 200 */
 201 inline int ao_stop_immediately(me4600_ao_subdevice_t *instance);
 202
 203 /** Task for asynchronical state verifying.
 204 */
 205 static void me4600_ao_work_control_task(struct work_struct *work);
 206 /* Functions
 207  */
 208
 209 static int me4600_ao_io_reset_subdevice(me_subdevice_t *subdevice,
 210                                         struct file *filep, int flags)
 211 {
 212         me4600_ao_subdevice_t *instance;
 213         int err = ME_ERRNO_SUCCESS;
 214         uint32_t tmp;
 215
 216         instance = (me4600_ao_subdevice_t *) subdevice;
 217
 218         PDEBUG("executed. idx=%d\n", instance->ao_idx);
 219
 220         if (flags) {
 221                 PERROR("Invalid flag specified.\n");
 222                 return ME_ERRNO_INVALID_FLAGS;
 223         }
 224
 225         ME_SUBDEVICE_ENTER;
 226
 227         instance->status = ao_status_none;
 228         instance->ao_control_task_flag = 0;
 229         cancel_delayed_work(&instance->ao_control_task);
 230         instance->timeout.delay = 0;
 231         instance->timeout.start_time = jiffies;
 232
 233         //Stop state machine.
 234         err = ao_stop_immediately(instance);
 235
 236         //Remove from synchronous start.
 237         spin_lock(instance->preload_reg_lock);
 238         tmp = inl(instance->preload_reg);
 239         tmp &=
 240             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->
 241               ao_idx);
 242         outl(tmp, instance->preload_reg);
 243         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 244                    instance->preload_reg - instance->reg_base, tmp);
 245         *instance->preload_flags &=
 246             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->
 247               ao_idx);
 248         spin_unlock(instance->preload_reg_lock);
 249
 250         //Set single mode, dissable FIFO, dissable external trigger, set output to analog, block interrupt.
 251         outl(ME4600_AO_MODE_SINGLE | ME4600_AO_CTRL_BIT_STOP |
 252              ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_RESET_IRQ,
 253              instance->ctrl_reg);
 254         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 255                    instance->ctrl_reg - instance->reg_base,
 256                    ME4600_AO_MODE_SINGLE | ME4600_AO_CTRL_BIT_STOP |
 257                    ME4600_AO_CTRL_BIT_IMMEDIATE_STOP |
 258                    ME4600_AO_CTRL_BIT_RESET_IRQ);
 259
 260         //Set output to 0V
 261         outl(0x8000, instance->single_reg);
 262         PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 263                    instance->single_reg - instance->reg_base, 0x8000);
 264
 265         instance->circ_buf.head = 0;
 266         instance->circ_buf.tail = 0;
 267         instance->preloaded_count = 0;
 268         instance->data_count = 0;
 269         instance->single_value = 0x8000;
 270         instance->single_value_in_fifo = 0x8000;
 271
 272         //Set status to signal that device is unconfigured.
 273         instance->status = ao_status_none;
 274
 275         //Signal reset if user is on wait.
 276         wake_up_interruptible_all(&instance->wait_queue);
 277
 278         ME_SUBDEVICE_EXIT;
 279
 280         return err;
 281 }
 282
 283 static int me4600_ao_io_single_config(me_subdevice_t *subdevice,
 284                                       struct file *filep,
 285                                       int channel,
 286                                       int single_config,
 287                                       int ref,
 288                                       int trig_chan,
 289                                       int trig_type, int trig_edge, int flags)
 290 {
 291         me4600_ao_subdevice_t *instance;
 292         int err = ME_ERRNO_SUCCESS;
 293         uint32_t ctrl;
 294         uint32_t sync;
 295         unsigned long cpu_flags;
 296
 297         instance = (me4600_ao_subdevice_t *) subdevice;
 298
 299         PDEBUG("executed. idx=%d\n", instance->ao_idx);
 300
 301         // Checking parameters
 302         if (flags) {
 303                 PERROR
 304                     ("Invalid flag specified. Must be ME_IO_SINGLE_CONFIG_NO_FLAGS.\n");
 305                 return ME_ERRNO_INVALID_FLAGS;
 306         }
 307
 308         switch (trig_type) {
 309         case ME_TRIG_TYPE_SW:
 310                 if (trig_edge != ME_TRIG_EDGE_NONE) {
 311                         PERROR
 312                             ("Invalid trigger edge. Software trigger has not edge.\n");
 313                         return ME_ERRNO_INVALID_TRIG_EDGE;
 314                 }
 315                 break;
 316
 317         case ME_TRIG_TYPE_EXT_DIGITAL:
 318                 switch (trig_edge) {
 319                 case ME_TRIG_EDGE_ANY:
 320                 case ME_TRIG_EDGE_RISING:
 321                 case ME_TRIG_EDGE_FALLING:
 322                         break;
 323
 324                 default:
 325                         PERROR("Invalid trigger edge.\n");
 326                         return ME_ERRNO_INVALID_TRIG_EDGE;
 327                 }
 328                 break;
 329
 330         default:
 331                 PERROR
 332                     ("Invalid trigger type. Trigger must be software or digital.\n");
 333                 return ME_ERRNO_INVALID_TRIG_TYPE;
 334         }
 335
 336         if ((trig_chan != ME_TRIG_CHAN_DEFAULT)
 337             && (trig_chan != ME_TRIG_CHAN_SYNCHRONOUS)) {
 338                 PERROR("Invalid trigger channel specified.\n");
 339                 return ME_ERRNO_INVALID_TRIG_CHAN;
 340         }
 341
 342         if (ref != ME_REF_AO_GROUND) {
 343                 PERROR
 344                     ("Invalid reference. Analog outputs have to have got REF_AO_GROUND.\n");
 345                 return ME_ERRNO_INVALID_REF;
 346         }
 347
 348         if (single_config != 0) {
 349                 PERROR
 350                     ("Invalid single config specified. Only one range for anlog outputs is available.\n");
 351                 return ME_ERRNO_INVALID_SINGLE_CONFIG;
 352         }
 353
 354         if (channel != 0) {
 355                 PERROR
 356                     ("Invalid channel number specified. Analog output have only one channel.\n");
 357                 return ME_ERRNO_INVALID_CHANNEL;
 358         }
 359
 360         ME_SUBDEVICE_ENTER;
 361
 362         //Subdevice running in stream mode!
 363         if ((instance->status >= ao_status_stream_run_wait)
 364             && (instance->status < ao_status_stream_end)) {
 365                 PERROR("Subdevice is busy.\n");
 366                 ME_SUBDEVICE_EXIT;
 367
 368                 return ME_ERRNO_SUBDEVICE_BUSY;
 369         }
 370 /// @note For single all calls (config and write) are erasing previous state!
 371
 372         instance->status = ao_status_none;
 373
 374         // Correct single mirrors
 375         instance->single_value_in_fifo = instance->single_value;
 376
 377         //Stop device
 378         err = ao_stop_immediately(instance);
 379         if (err) {
 380                 PERROR_CRITICAL("FSM IS BUSY!\n");
 381                 ME_SUBDEVICE_EXIT;
 382
 383                 return ME_ERRNO_SUBDEVICE_BUSY;
 384         }
 385         // Set control register.
 386         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
 387         // Set stop bit. Stop streaming mode.
 388         ctrl = inl(instance->ctrl_reg);
 389         //Reset all bits.
 390         ctrl = ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_STOP;
 391
 392         if (trig_type == ME_TRIG_TYPE_EXT_DIGITAL) {
 393                 PINFO("External digital trigger.\n");
 394
 395                 if (trig_edge == ME_TRIG_EDGE_ANY) {
 396 //                              ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE | ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
 397                         instance->ctrl_trg =
 398                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
 399                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
 400                 } else if (trig_edge == ME_TRIG_EDGE_FALLING) {
 401 //                              ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
 402                         instance->ctrl_trg = ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
 403                 } else if (trig_edge == ME_TRIG_EDGE_RISING) {
 404                         instance->ctrl_trg = 0x0;
 405                 }
 406         } else if (trig_type == ME_TRIG_TYPE_SW) {
 407                 PDEBUG("Software trigger\n");
 408                 instance->ctrl_trg = 0x0;
 409         }
 410
 411         outl(ctrl, instance->ctrl_reg);
 412         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 413                    instance->ctrl_reg - instance->reg_base, ctrl);
 414         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
 415
 416         // Set preload/synchronization register.
 417         spin_lock(instance->preload_reg_lock);
 418         if (trig_type == ME_TRIG_TYPE_SW) {
 419                 *instance->preload_flags &=
 420                     ~(ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx);
 421         } else                  //if (trig_type == ME_TRIG_TYPE_EXT_DIGITAL)
 422         {
 423                 *instance->preload_flags |=
 424                     ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx;
 425         }
 426
 427         if (trig_chan == ME_TRIG_CHAN_DEFAULT) {
 428                 *instance->preload_flags &=
 429                     ~(ME4600_AO_SYNC_HOLD << instance->ao_idx);
 430         } else                  //if (trig_chan == ME_TRIG_CHAN_SYNCHRONOUS)
 431         {
 432                 *instance->preload_flags |=
 433                     ME4600_AO_SYNC_HOLD << instance->ao_idx;
 434         }
 435
 436         //Reset hardware register
 437         sync = inl(instance->preload_reg);
 438         PDEBUG_REG("preload_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 439                    instance->preload_reg - instance->reg_base, sync);
 440         sync &= ~(ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx);
 441         sync |= ME4600_AO_SYNC_HOLD << instance->ao_idx;
 442
 443         //Output configured in default (safe) mode.
 444         outl(sync, instance->preload_reg);
 445         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 446                    instance->preload_reg - instance->reg_base, sync);
 447         spin_unlock(instance->preload_reg_lock);
 448
 449         instance->status = ao_status_single_configured;
 450
 451         ME_SUBDEVICE_EXIT;
 452
 453         return err;
 454 }
 455
 456 static int me4600_ao_io_single_read(me_subdevice_t *subdevice,
 457                                     struct file *filep,
 458                                     int channel,
 459                                     int *value, int time_out, int flags)
 460 {
 461         me4600_ao_subdevice_t *instance;
 462         int err = ME_ERRNO_SUCCESS;
 463
 464         unsigned long j;
 465         unsigned long delay = 0;
 466
 467         instance = (me4600_ao_subdevice_t *) subdevice;
 468
 469         PDEBUG("executed. idx=%d\n", instance->ao_idx);
 470
 471         if (flags & ~ME_IO_SINGLE_NONBLOCKING) {
 472                 PERROR("Invalid flag specified. %d\n", flags);
 473                 return ME_ERRNO_INVALID_FLAGS;
 474         }
 475
 476         if (time_out < 0) {
 477                 PERROR("Invalid timeout specified.\n");
 478                 return ME_ERRNO_INVALID_TIMEOUT;
 479         }
 480
 481         if (channel != 0) {
 482                 PERROR("Invalid channel number specified.\n");
 483                 return ME_ERRNO_INVALID_CHANNEL;
 484         }
 485
 486         if ((instance->status >= ao_status_stream_configured)
 487             && (instance->status <= ao_status_stream_end)) {
 488                 PERROR("Subdevice not configured to work in single mode!\n");
 489                 return ME_ERRNO_PREVIOUS_CONFIG;
 490         }
 491
 492         ME_SUBDEVICE_ENTER;
 493         if ((!flags) && (instance->status == ao_status_single_run_wait)) {      //Blocking mode. Wait for trigger.
 494                 if (time_out) {
 495                         delay = (time_out * HZ) / 1000;
 496                         if (delay == 0)
 497                                 delay = 1;
 498                 }
 499
 500                 j = jiffies;
 501
 502                 //Only runing process will interrupt this call. Events are signaled when status change. This procedure has own timeout.
 503                 wait_event_interruptible_timeout(instance->wait_queue,
 504                                                  (instance->status !=
 505                                                   ao_status_single_run_wait),
 506                                                  (delay) ? delay +
 507                                                  1 : LONG_MAX);
 508
 509                 if (instance->status == ao_status_none) {
 510                         PDEBUG("Single canceled.\n");
 511                         err = ME_ERRNO_CANCELLED;
 512                 }
 513
 514                 if (signal_pending(current)) {
 515                         PERROR("Wait on start of state machine interrupted.\n");
 516                         instance->status = ao_status_none;
 517                         ao_stop_immediately(instance);
 518                         err = ME_ERRNO_SIGNAL;
 519                 }
 520
 521                 if ((delay) && ((jiffies - j) >= delay)) {
 522
 523                         PDEBUG("Timeout reached.\n");
 524                         err = ME_ERRNO_TIMEOUT;
 525                 }
 526
 527                 *value =
 528                     (!err) ? instance->single_value_in_fifo : instance->
 529                     single_value;
 530         } else {                //Non-blocking mode
 531                 //Read value
 532                 *value = instance->single_value;
 533         }
 534
 535         ME_SUBDEVICE_EXIT;
 536
 537         return err;
 538 }
 539
 540 static int me4600_ao_io_single_write(me_subdevice_t *subdevice,
 541                                      struct file *filep,
 542                                      int channel,
 543                                      int value, int time_out, int flags)
 544 {
 545         me4600_ao_subdevice_t *instance;
 546         int err = ME_ERRNO_SUCCESS;
 547         unsigned long cpu_flags;
 548         unsigned long j;
 549         unsigned long delay = 0x0;
 550
 551         //Registry handling variables.
 552         uint32_t sync_mask;
 553         uint32_t mode;
 554         uint32_t tmp;
 555         uint32_t ctrl;
 556         uint32_t status;
 557
 558         instance = (me4600_ao_subdevice_t *) subdevice;
 559
 560         PDEBUG("executed. idx=%d\n", instance->ao_idx);
 561
 562         if (flags &
 563             ~(ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS |
 564               ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) {
 565                 PERROR("Invalid flag specified.\n");
 566                 return ME_ERRNO_INVALID_FLAGS;
 567         }
 568
 569         if (time_out < 0) {
 570                 PERROR("Invalid timeout specified.\n");
 571                 return ME_ERRNO_INVALID_TIMEOUT;
 572         }
 573
 574         if (value & ~ME4600_AO_MAX_DATA) {
 575                 PERROR("Invalid value provided.\n");
 576                 return ME_ERRNO_VALUE_OUT_OF_RANGE;
 577         }
 578
 579         if (channel != 0) {
 580                 PERROR("Invalid channel number specified.\n");
 581                 return ME_ERRNO_INVALID_CHANNEL;
 582         }
 583
 584         if ((instance->status == ao_status_none)
 585             || (instance->status > ao_status_single_end)) {
 586                 PERROR("Subdevice not configured to work in single mode!\n");
 587                 return ME_ERRNO_PREVIOUS_CONFIG;
 588         }
 589
 590         ME_SUBDEVICE_ENTER;
 591
 592 /// @note For single all calls (config and write) are erasing previous state!
 593
 594         //Cancel control task
 595         PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx);
 596         instance->ao_control_task_flag = 0;
 597         cancel_delayed_work(&instance->ao_control_task);
 598
 599         // Correct single mirrors
 600         instance->single_value_in_fifo = instance->single_value;
 601
 602         //Stop device
 603         err = ao_stop_immediately(instance);
 604         if (err) {
 605                 PERROR_CRITICAL("FSM IS BUSY!\n");
 606                 ME_SUBDEVICE_EXIT;
 607
 608                 return ME_ERRNO_SUBDEVICE_BUSY;
 609         }
 610
 611         if (time_out) {
 612                 delay = (time_out * HZ) / 1000;
 613
 614                 if (delay == 0)
 615                         delay = 1;
 616         }
 617
 618         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
 619
 620         instance->single_value_in_fifo = value;
 621
 622         ctrl = inl(instance->ctrl_reg);
 623
 624         if (!instance->fifo) {  //No FIFO
 625                 //Set the single mode.
 626                 ctrl &= ~ME4600_AO_CTRL_MODE_MASK;
 627
 628                 //Write value
 629                 PDEBUG("Write value\n");
 630                 outl(value, instance->single_reg);
 631                 PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
 632                            instance->reg_base,
 633                            instance->single_reg - instance->reg_base, value);
 634         } else {                // mix-mode
 635                 //Set speed
 636                 outl(ME4600_AO_MIN_CHAN_TICKS - 1, instance->timer_reg);
 637                 PDEBUG_REG("timer_reg outl(0x%lX+0x%lX)=0x%x\n",
 638                            instance->reg_base,
 639                            instance->timer_reg - instance->reg_base,
 640                            (int)ME4600_AO_MIN_CHAN_TICKS);
 641                 instance->hardware_stop_delay = HZ / 10;        //100ms
 642
 643                 status = inl(instance->status_reg);
 644
 645                 //Set the continous mode.
 646                 ctrl &= ~ME4600_AO_CTRL_MODE_MASK;
 647                 ctrl |= ME4600_AO_MODE_CONTINUOUS;
 648
 649                 //Prepare FIFO
 650                 if (!(ctrl & ME4600_AO_CTRL_BIT_ENABLE_FIFO)) { //FIFO wasn't enabeled. Do it.
 651                         PINFO("Enableing FIFO.\n");
 652                         ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
 653                         ctrl |=
 654                             ME4600_AO_CTRL_BIT_ENABLE_FIFO |
 655                             ME4600_AO_CTRL_BIT_RESET_IRQ;
 656                 } else {        //Check if FIFO is empty
 657                         if (status & ME4600_AO_STATUS_BIT_EF) { //FIFO not empty
 658                                 PINFO("Reseting FIFO.\n");
 659                                 ctrl &=
 660                                     ~(ME4600_AO_CTRL_BIT_ENABLE_FIFO |
 661                                       ME4600_AO_CTRL_BIT_ENABLE_IRQ);
 662                                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
 663                                 outl(ctrl, instance->ctrl_reg);
 664                                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
 665                                            instance->reg_base,
 666                                            instance->ctrl_reg -
 667                                            instance->reg_base, ctrl);
 668
 669                                 ctrl |=
 670                                     ME4600_AO_CTRL_BIT_ENABLE_FIFO |
 671                                     ME4600_AO_CTRL_BIT_RESET_IRQ;
 672                         } else {        //FIFO empty, only interrupt needs to be disabled!
 673                                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
 674                                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
 675                         }
 676                 }
 677
 678                 outl(ctrl, instance->ctrl_reg);
 679                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
 680                            instance->reg_base,
 681                            instance->ctrl_reg - instance->reg_base, ctrl);
 682
 683                 //Write output - 1 value to FIFO
 684                 if (instance->ao_idx & 0x1) {
 685                         outl(value <<= 16, instance->fifo_reg);
 686                         PDEBUG_REG("fifo_reg outl(0x%lX+0x%lX)=0x%x\n",
 687                                    instance->reg_base,
 688                                    instance->fifo_reg - instance->reg_base,
 689                                    value <<= 16);
 690                 } else {
 691                         outl(value, instance->fifo_reg);
 692                         PDEBUG_REG("fifo_reg outl(0x%lX+0x%lX)=0x%x\n",
 693                                    instance->reg_base,
 694                                    instance->fifo_reg - instance->reg_base,
 695                                    value);
 696                 }
 697         }
 698
 699         mode = *instance->preload_flags >> instance->ao_idx;
 700         mode &= (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG);
 701
 702         PINFO("Triggering mode: 0x%x\n", mode);
 703
 704         spin_lock(instance->preload_reg_lock);
 705         sync_mask = inl(instance->preload_reg);
 706         PDEBUG_REG("preload_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 707                    instance->preload_reg - instance->reg_base, sync_mask);
 708         switch (mode) {
 709         case 0:         //Individual software
 710                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
 711
 712                 if (!instance->fifo) {  // No FIFO - In this case resetting 'ME4600_AO_SYNC_HOLD' will trigger output.
 713                         if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != ME4600_AO_SYNC_HOLD) {       //Now we can set correct mode. This is exception. It is set to synchronous and triggered later.
 714                                 sync_mask &=
 715                                     ~(ME4600_AO_SYNC_EXT_TRIG << instance->
 716                                       ao_idx);
 717                                 sync_mask |=
 718                                     ME4600_AO_SYNC_HOLD << instance->ao_idx;
 719
 720                                 outl(sync_mask, instance->preload_reg);
 721                                 PDEBUG_REG
 722                                     ("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 723                                      instance->reg_base,
 724                                      instance->preload_reg - instance->reg_base,
 725                                      sync_mask);
 726                         }
 727                 } else {        // FIFO
 728                         if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != 0x0) {       //Now we can set correct mode.
 729                                 sync_mask &=
 730                                     ~((ME4600_AO_SYNC_EXT_TRIG |
 731                                        ME4600_AO_SYNC_HOLD) << instance->
 732                                       ao_idx);
 733
 734                                 outl(sync_mask, instance->preload_reg);
 735                                 PDEBUG_REG
 736                                     ("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 737                                      instance->reg_base,
 738                                      instance->preload_reg - instance->reg_base,
 739                                      sync_mask);
 740                         }
 741                 }
 742                 instance->single_value = value;
 743                 break;
 744
 745         case ME4600_AO_SYNC_EXT_TRIG:   //Individual hardware
 746                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
 747
 748                 if (!instance->fifo) {  // No FIFO - In this case resetting 'ME4600_AO_SYNC_HOLD' will trigger output.
 749                         if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != ME4600_AO_SYNC_HOLD) {       //Now we can set correct mode
 750                                 sync_mask &=
 751                                     ~(ME4600_AO_SYNC_EXT_TRIG << instance->
 752                                       ao_idx);
 753                                 sync_mask |=
 754                                     ME4600_AO_SYNC_HOLD << instance->ao_idx;
 755
 756                                 outl(sync_mask, instance->preload_reg);
 757                                 PDEBUG_REG
 758                                     ("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 759                                      instance->reg_base,
 760                                      instance->preload_reg - instance->reg_base,
 761                                      sync_mask);
 762                         }
 763                 } else {        // FIFO
 764                         if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != 0x0) {       //Now we can set correct mode.
 765                                 sync_mask &=
 766                                     ~((ME4600_AO_SYNC_EXT_TRIG |
 767                                        ME4600_AO_SYNC_HOLD) << instance->
 768                                       ao_idx);
 769
 770                                 outl(sync_mask, instance->preload_reg);
 771                                 PDEBUG_REG
 772                                     ("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 773                                      instance->reg_base,
 774                                      instance->preload_reg - instance->reg_base,
 775                                      sync_mask);
 776                         }
 777                 }
 778                 break;
 779
 780         case ME4600_AO_SYNC_HOLD:       //Synchronous software
 781                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
 782
 783 //                                      if((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != ME4600_AO_SYNC_HOLD)
 784                 if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG)) {   //Now we can set correct mode
 785                         sync_mask |=
 786                             ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx;
 787 //                                              sync_mask &= ~(ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx);
 788                         sync_mask |= ME4600_AO_SYNC_HOLD << instance->ao_idx;
 789
 790                         outl(sync_mask, instance->preload_reg);
 791                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 792                                    instance->reg_base,
 793                                    instance->preload_reg - instance->reg_base,
 794                                    sync_mask);
 795                 }
 796                 break;
 797
 798         case (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG):   //Synchronous hardware
 799                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
 800                 if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG)) {   //Now we can set correct mode
 801                         sync_mask |=
 802                             (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) <<
 803                             instance->ao_idx;
 804
 805                         outl(sync_mask, instance->preload_reg);
 806                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 807                                    instance->reg_base,
 808                                    instance->preload_reg - instance->reg_base,
 809                                    sync_mask);
 810                 }
 811                 break;
 812         }
 813 //              spin_unlock(instance->preload_reg_lock);        // Moved down.
 814
 815         //Activate ISM (remove 'stop' bits)
 816         ctrl &=
 817             ~(ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
 818               ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH);
 819         ctrl |= instance->ctrl_trg;
 820         ctrl &= ~(ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
 821         outl(ctrl, instance->ctrl_reg);
 822         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 823                    instance->ctrl_reg - instance->reg_base, ctrl);
 824         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
 825
 826 /// @note When flag 'ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS' is set than output is triggered. ALWAYS!
 827
 828         if (!instance->fifo) {  //No FIFO
 829                 if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {       //Fired all software synchronous outputs.
 830                         tmp = ~(*instance->preload_flags | 0xFFFF0000);
 831                         PINFO
 832                             ("Fired all software synchronous outputs. mask:0x%08x\n",
 833                              tmp);
 834                         tmp |= sync_mask & 0xFFFF0000;
 835                         // Add this channel to list
 836                         tmp &= ~(ME4600_AO_SYNC_HOLD << instance->ao_idx);
 837
 838                         //Fire
 839                         PINFO("Software trigger.\n");
 840                         outl(tmp, instance->preload_reg);
 841                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 842                                    instance->reg_base,
 843                                    instance->preload_reg - instance->reg_base,
 844                                    tmp);
 845
 846                         //Restore save settings
 847                         outl(sync_mask, instance->preload_reg);
 848                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 849                                    instance->reg_base,
 850                                    instance->preload_reg - instance->reg_base,
 851                                    sync_mask);
 852                 } else if (!mode) {     // Add this channel to list
 853                         outl(sync_mask &
 854                              ~(ME4600_AO_SYNC_HOLD << instance->ao_idx),
 855                              instance->preload_reg);
 856                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 857                                    instance->reg_base,
 858                                    instance->preload_reg - instance->reg_base,
 859                                    sync_mask & ~(ME4600_AO_SYNC_HOLD <<
 860                                                  instance->ao_idx));
 861
 862                         //Fire
 863                         PINFO("Software trigger.\n");
 864
 865                         //Restore save settings
 866                         outl(sync_mask, instance->preload_reg);
 867                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 868                                    instance->reg_base,
 869                                    instance->preload_reg - instance->reg_base,
 870                                    sync_mask);
 871                 }
 872
 873         } else {                // mix-mode - begin
 874                 if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {       //Trigger outputs
 875                         //Add channel to start list
 876                         outl(sync_mask |
 877                              (ME4600_AO_SYNC_HOLD << instance->ao_idx),
 878                              instance->preload_reg);
 879                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 880                                    instance->reg_base,
 881                                    instance->preload_reg - instance->reg_base,
 882                                    sync_mask | (ME4600_AO_SYNC_HOLD <<
 883                                                 instance->ao_idx));
 884
 885                         //Fire
 886                         PINFO
 887                             ("Fired all software synchronous outputs by software trigger.\n");
 888                         outl(0x8000, instance->single_reg);
 889                         PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
 890                                    instance->reg_base,
 891                                    instance->single_reg - instance->reg_base,
 892                                    0x8000);
 893
 894                         //Restore save settings
 895                         outl(sync_mask, instance->preload_reg);
 896                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 897                                    instance->reg_base,
 898                                    instance->preload_reg - instance->reg_base,
 899                                    sync_mask);
 900                 } else if (!mode) {     //Trigger outputs
 901 /*                      //Remove channel from start list //<== Unnecessary. Removed.
 902                         outl(sync_mask & ~(ME4600_AO_SYNC_HOLD << instance->ao_idx), instance->preload_reg);
 903                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, tmp);
 904 */
 905                         //Fire
 906                         PINFO("Software trigger.\n");
 907                         outl(0x8000, instance->single_reg);
 908                         PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
 909                                    instance->reg_base,
 910                                    instance->single_reg - instance->reg_base,
 911                                    0x8000);
 912
 913 /*                      //Restore save settings //<== Unnecessary. Removed.
 914                         outl(sync_mask, instance->preload_reg);
 915                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, sync_mask);
 916 */
 917                 }
 918         }
 919         spin_unlock(instance->preload_reg_lock);
 920
 921         j = jiffies;
 922         instance->status = ao_status_single_run_wait;
 923
 924         instance->timeout.delay = delay;
 925         instance->timeout.start_time = j;
 926         instance->ao_control_task_flag = 1;
 927         queue_delayed_work(instance->me4600_workqueue,
 928                            &instance->ao_control_task, 1);
 929
 930         if (!(flags & ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) {
 931
 932                 //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason.
 933                 wait_event_interruptible_timeout(instance->wait_queue,
 934                                                  (instance->status !=
 935                                                   ao_status_single_run_wait),
 936                                                  (delay) ? delay +
 937                                                  1 : LONG_MAX);
 938
 939                 if (((!delay) || ((jiffies - j) <= delay))
 940                     && (instance->status != ao_status_single_end)) {
 941                         PDEBUG("Single canceled.\n");
 942                         err = ME_ERRNO_CANCELLED;
 943                 }
 944
 945                 if (signal_pending(current)) {
 946                         PERROR("Wait on start of state machine interrupted.\n");
 947                         instance->ao_control_task_flag = 0;
 948                         cancel_delayed_work(&instance->ao_control_task);
 949                         ao_stop_immediately(instance);
 950                         instance->status = ao_status_none;
 951                         err = ME_ERRNO_SIGNAL;
 952                 }
 953
 954                 if ((delay) && ((jiffies - j) >= delay)) {
 955                         if (instance->status == ao_status_single_end) {
 956                                 PDEBUG("Timeout reached.\n");
 957                         } else {
 958                                 if ((jiffies - j) > delay) {
 959                                         PERROR
 960                                             ("Timeout reached. Not handled by control task!\n");
 961                                 } else {
 962                                         PERROR
 963                                             ("Timeout reached. Signal come but status is strange: %d\n",
 964                                              instance->status);
 965                                 }
 966
 967                                 ao_stop_immediately(instance);
 968                         }
 969
 970                         instance->ao_control_task_flag = 0;
 971                         cancel_delayed_work(&instance->ao_control_task);
 972                         instance->status = ao_status_single_end;
 973                         err = ME_ERRNO_TIMEOUT;
 974                 }
 975         }
 976
 977         ME_SUBDEVICE_EXIT;
 978
 979         return err;
 980 }
 981
 982 static int me4600_ao_io_stream_config(me_subdevice_t *subdevice,
 983                                       struct file *filep,
 984                                       meIOStreamConfig_t *config_list,
 985                                       int count,
 986                                       meIOStreamTrigger_t *trigger,
 987                                       int fifo_irq_threshold, int flags)
 988 {
 989         me4600_ao_subdevice_t *instance;
 990         int err = ME_ERRNO_SUCCESS;
 991         uint32_t ctrl;
 992         unsigned long cpu_flags;
 993         uint64_t conv_ticks;
 994         unsigned int conv_start_ticks_low = trigger->iConvStartTicksLow;
 995         unsigned int conv_start_ticks_high = trigger->iConvStartTicksHigh;
 996
 997         instance = (me4600_ao_subdevice_t *) subdevice;
 998
 999         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1000
1001         if (!instance->fifo) {
1002                 PERROR("Not a streaming ao.\n");
1003                 return ME_ERRNO_NOT_SUPPORTED;
1004         }
1005
1006         conv_ticks =
1007             (uint64_t) conv_start_ticks_low +
1008             ((uint64_t) conv_start_ticks_high << 32);
1009
1010         if (flags &
1011             ~(ME_IO_STREAM_CONFIG_HARDWARE_ONLY | ME_IO_STREAM_CONFIG_WRAPAROUND
1012               | ME_IO_STREAM_CONFIG_BIT_PATTERN)) {
1013                 PERROR("Invalid flags.\n");
1014                 return ME_ERRNO_INVALID_FLAGS;
1015         }
1016
1017         if (flags & ME_IO_STREAM_CONFIG_HARDWARE_ONLY) {
1018                 if (!(flags & ME_IO_STREAM_CONFIG_WRAPAROUND)) {
1019                         PERROR
1020                             ("Hardware ME_IO_STREAM_CONFIG_HARDWARE_ONLY has to be with ME_IO_STREAM_CONFIG_WRAPAROUND.\n");
1021                         return ME_ERRNO_INVALID_FLAGS;
1022                 }
1023
1024                 if ((trigger->iAcqStopTrigType != ME_TRIG_TYPE_NONE)
1025                     || (trigger->iScanStopTrigType != ME_TRIG_TYPE_NONE)) {
1026                         PERROR
1027                             ("Hardware wraparound mode must be in infinite mode.\n");
1028                         return ME_ERRNO_INVALID_FLAGS;
1029                 }
1030         }
1031
1032         if (count != 1) {
1033                 PERROR("Only 1 entry in config list acceptable.\n");
1034                 return ME_ERRNO_INVALID_CONFIG_LIST_COUNT;
1035         }
1036
1037         if (config_list[0].iChannel != 0) {
1038                 PERROR("Invalid channel number specified.\n");
1039                 return ME_ERRNO_INVALID_CHANNEL;
1040         }
1041
1042         if (config_list[0].iStreamConfig != 0) {
1043                 PERROR("Only one range available.\n");
1044                 return ME_ERRNO_INVALID_STREAM_CONFIG;
1045         }
1046
1047         if (config_list[0].iRef != ME_REF_AO_GROUND) {
1048                 PERROR("Output is referenced to ground.\n");
1049                 return ME_ERRNO_INVALID_REF;
1050         }
1051
1052         if ((trigger->iAcqStartTicksLow != 0)
1053             || (trigger->iAcqStartTicksHigh != 0)) {
1054                 PERROR
1055                     ("Invalid acquisition start trigger argument specified.\n");
1056                 return ME_ERRNO_INVALID_ACQ_START_ARG;
1057         }
1058
1059         if (config_list[0].iFlags) {
1060                 PERROR("Invalid config list flag.\n");
1061                 return ME_ERRNO_INVALID_FLAGS;
1062         }
1063
1064         switch (trigger->iAcqStartTrigType) {
1065         case ME_TRIG_TYPE_SW:
1066                 if (trigger->iAcqStartTrigEdge != ME_TRIG_EDGE_NONE) {
1067                         PERROR
1068                             ("Invalid acquisition start trigger edge specified.\n");
1069                         return ME_ERRNO_INVALID_ACQ_START_TRIG_EDGE;
1070                 }
1071                 break;
1072
1073         case ME_TRIG_TYPE_EXT_DIGITAL:
1074                 switch (trigger->iAcqStartTrigEdge) {
1075                 case ME_TRIG_EDGE_ANY:
1076                 case ME_TRIG_EDGE_RISING:
1077                 case ME_TRIG_EDGE_FALLING:
1078                         break;
1079
1080                 default:
1081                         PERROR
1082                             ("Invalid acquisition start trigger edge specified.\n");
1083                         return ME_ERRNO_INVALID_ACQ_START_TRIG_EDGE;
1084                 }
1085                 break;
1086
1087         default:
1088                 PERROR("Invalid acquisition start trigger type specified.\n");
1089                 return ME_ERRNO_INVALID_ACQ_START_TRIG_TYPE;
1090         }
1091
1092         if (trigger->iScanStartTrigType != ME_TRIG_TYPE_FOLLOW) {
1093                 PERROR("Invalid scan start trigger type specified.\n");
1094                 return ME_ERRNO_INVALID_SCAN_START_TRIG_TYPE;
1095         }
1096
1097         if (trigger->iConvStartTrigType != ME_TRIG_TYPE_TIMER) {
1098                 PERROR("Invalid conv start trigger type specified.\n");
1099                 return ME_ERRNO_INVALID_CONV_START_TRIG_TYPE;
1100         }
1101
1102         if ((conv_ticks < ME4600_AO_MIN_CHAN_TICKS)
1103             || (conv_ticks > ME4600_AO_MAX_CHAN_TICKS)) {
1104                 PERROR("Invalid conv start trigger argument specified.\n");
1105                 return ME_ERRNO_INVALID_CONV_START_ARG;
1106         }
1107
1108         if (trigger->iAcqStartTicksLow || trigger->iAcqStartTicksHigh) {
1109                 PERROR("Invalid acq start trigger argument specified.\n");
1110                 return ME_ERRNO_INVALID_ACQ_START_ARG;
1111         }
1112
1113         if (trigger->iScanStartTicksLow || trigger->iScanStartTicksHigh) {
1114                 PERROR("Invalid scan start trigger argument specified.\n");
1115                 return ME_ERRNO_INVALID_SCAN_START_ARG;
1116         }
1117
1118         switch (trigger->iScanStopTrigType) {
1119         case ME_TRIG_TYPE_NONE:
1120                 if (trigger->iScanStopCount != 0) {
1121                         PERROR("Invalid scan stop count specified.\n");
1122                         return ME_ERRNO_INVALID_SCAN_STOP_ARG;
1123                 }
1124                 break;
1125
1126         case ME_TRIG_TYPE_COUNT:
1127                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
1128                         if (trigger->iScanStopCount <= 0) {
1129                                 PERROR("Invalid scan stop count specified.\n");
1130                                 return ME_ERRNO_INVALID_SCAN_STOP_ARG;
1131                         }
1132                 } else {
1133                         PERROR("The continous mode has not 'scan' contects.\n");
1134                         return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
1135                 }
1136                 break;
1137
1138         default:
1139                 PERROR("Invalid scan stop trigger type specified.\n");
1140                 return ME_ERRNO_INVALID_SCAN_STOP_TRIG_TYPE;
1141         }
1142
1143         switch (trigger->iAcqStopTrigType) {
1144         case ME_TRIG_TYPE_NONE:
1145                 if (trigger->iAcqStopCount != 0) {
1146                         PERROR("Invalid acq stop count specified.\n");
1147                         return ME_ERRNO_INVALID_ACQ_STOP_ARG;
1148                 }
1149                 break;
1150
1151         case ME_TRIG_TYPE_COUNT:
1152                 if (trigger->iScanStopTrigType != ME_TRIG_TYPE_NONE) {
1153                         PERROR("Invalid acq stop trigger type specified.\n");
1154                         return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
1155                 }
1156
1157                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
1158                         if (trigger->iAcqStopCount <= 0) {
1159                                 PERROR
1160                                     ("The continous mode has not 'scan' contects.\n");
1161                                 return ME_ERRNO_INVALID_ACQ_STOP_ARG;
1162                         }
1163                 }
1164                 break;
1165
1166         default:
1167                 PERROR("Invalid acq stop trigger type specified.\n");
1168                 return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
1169         }
1170
1171         switch (trigger->iAcqStartTrigChan) {
1172         case ME_TRIG_CHAN_DEFAULT:
1173         case ME_TRIG_CHAN_SYNCHRONOUS:
1174                 break;
1175
1176         default:
1177                 PERROR("Invalid acq start trigger channel specified.\n");
1178                 return ME_ERRNO_INVALID_ACQ_START_TRIG_CHAN;
1179         }
1180
1181         ME_SUBDEVICE_ENTER;
1182
1183         if ((flags & ME_IO_STREAM_CONFIG_BIT_PATTERN) && !instance->bitpattern) {
1184                 PERROR("This subdevice not support output redirection.\n");
1185                 ME_SUBDEVICE_EXIT;
1186                 return ME_ERRNO_INVALID_FLAGS;
1187         }
1188         //Stop device
1189
1190         //Cancel control task
1191         PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx);
1192         instance->ao_control_task_flag = 0;
1193         cancel_delayed_work(&instance->ao_control_task);
1194
1195         //Check if state machine is stopped.
1196         err = ao_stop_immediately(instance);
1197         if (err) {
1198                 PERROR_CRITICAL("FSM IS BUSY!\n");
1199                 ME_SUBDEVICE_EXIT;
1200
1201                 return ME_ERRNO_SUBDEVICE_BUSY;
1202         }
1203
1204         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
1205         //Reset control register. Block all actions. Disable IRQ. Disable FIFO.
1206         ctrl =
1207             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_STOP |
1208             ME4600_AO_CTRL_BIT_RESET_IRQ;
1209         outl(ctrl, instance->ctrl_reg);
1210         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1211                    instance->ctrl_reg - instance->reg_base, ctrl);
1212
1213         //This is paranoic, but to be sure.
1214         instance->preloaded_count = 0;
1215         instance->data_count = 0;
1216         instance->circ_buf.head = 0;
1217         instance->circ_buf.tail = 0;
1218
1219         /* Set mode. */
1220         if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {   //Wraparound
1221                 if (flags & ME_IO_STREAM_CONFIG_HARDWARE_ONLY) {        //Hardware wraparound
1222                         PINFO("Hardware wraparound.\n");
1223                         ctrl |= ME4600_AO_MODE_WRAPAROUND;
1224                         instance->mode = ME4600_AO_HW_WRAP_MODE;
1225                 } else {        //Software wraparound
1226                         PINFO("Software wraparound.\n");
1227                         ctrl |= ME4600_AO_MODE_CONTINUOUS;
1228                         instance->mode = ME4600_AO_SW_WRAP_MODE;
1229                 }
1230         } else {                //Continous
1231                 PINFO("Continous.\n");
1232                 ctrl |= ME4600_AO_MODE_CONTINUOUS;
1233                 instance->mode = ME4600_AO_CONTINOUS;
1234         }
1235
1236         //Set the trigger edge.
1237         if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_EXT_DIGITAL) {   //Set the trigger type and edge for external trigger.
1238                 PINFO("External digital trigger.\n");
1239                 instance->start_mode = ME4600_AO_EXT_TRIG;
1240 /*
1241                         ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
1242 */
1243                 switch (trigger->iAcqStartTrigEdge) {
1244                 case ME_TRIG_EDGE_RISING:
1245                         PINFO("Set the trigger edge: rising.\n");
1246                         instance->ctrl_trg = 0x0;
1247                         break;
1248
1249                 case ME_TRIG_EDGE_FALLING:
1250                         PINFO("Set the trigger edge: falling.\n");
1251 //                                      ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
1252                         instance->ctrl_trg = ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
1253                         break;
1254
1255                 case ME_TRIG_EDGE_ANY:
1256                         PINFO("Set the trigger edge: both edges.\n");
1257 //                                      ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE | ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
1258                         instance->ctrl_trg =
1259                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
1260                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
1261                         break;
1262                 }
1263         } else {
1264                 PINFO("Internal software trigger.\n");
1265                 instance->start_mode = 0;
1266         }
1267
1268         //Set the stop mode and value.
1269         if (trigger->iAcqStopTrigType == ME_TRIG_TYPE_COUNT) {  //Amount of data
1270                 instance->stop_mode = ME4600_AO_ACQ_STOP_MODE;
1271                 instance->stop_count = trigger->iAcqStopCount;
1272         } else if (trigger->iScanStopTrigType == ME_TRIG_TYPE_COUNT) {  //Amount of 'scans'
1273                 instance->stop_mode = ME4600_AO_SCAN_STOP_MODE;
1274                 instance->stop_count = trigger->iScanStopCount;
1275         } else {                //Infinite
1276                 instance->stop_mode = ME4600_AO_INF_STOP_MODE;
1277                 instance->stop_count = 0;
1278         }
1279
1280         PINFO("Stop count: %d.\n", instance->stop_count);
1281
1282         if (trigger->iAcqStartTrigChan == ME_TRIG_CHAN_SYNCHRONOUS) {   //Synchronous start
1283                 instance->start_mode |= ME4600_AO_SYNC_HOLD;
1284                 if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_EXT_DIGITAL) {   //Externaly triggered
1285                         PINFO("Synchronous start. Externaly trigger active.\n");
1286                         instance->start_mode |= ME4600_AO_SYNC_EXT_TRIG;
1287                 }
1288 #ifdef MEDEBUG_INFO
1289                 else {
1290                         PINFO
1291                             ("Synchronous start. Externaly trigger dissabled.\n");
1292                 }
1293 #endif
1294
1295         }
1296         //Set speed
1297         outl(conv_ticks - 2, instance->timer_reg);
1298         PDEBUG_REG("timer_reg outl(0x%lX+0x%lX)=0x%llx\n", instance->reg_base,
1299                    instance->timer_reg - instance->reg_base, conv_ticks - 2);
1300         instance->hardware_stop_delay = (int)(conv_ticks * HZ) / ME4600_AO_BASE_FREQUENCY;      //<== MUST be with cast!
1301
1302         //Conect outputs to analog or digital port.
1303         if (flags & ME_IO_STREAM_CONFIG_BIT_PATTERN) {
1304                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_DO;
1305         }
1306         // Write the control word
1307         outl(ctrl, instance->ctrl_reg);
1308         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1309                    instance->ctrl_reg - instance->reg_base, ctrl);
1310
1311         //Set status.
1312         instance->status = ao_status_stream_configured;
1313         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
1314
1315         ME_SUBDEVICE_EXIT;
1316
1317         return err;
1318 }
1319
1320 static int me4600_ao_io_stream_new_values(me_subdevice_t *subdevice,
1321                                           struct file *filep,
1322                                           int time_out, int *count, int flags)
1323 {
1324         me4600_ao_subdevice_t *instance;
1325         int err = ME_ERRNO_SUCCESS;
1326         long t = 0;
1327         long j;
1328
1329         instance = (me4600_ao_subdevice_t *) subdevice;
1330
1331         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1332
1333         if (!instance->fifo) {
1334                 PERROR("Not a streaming ao.\n");
1335                 return ME_ERRNO_NOT_SUPPORTED;
1336         }
1337
1338         if (flags) {
1339                 PERROR("Invalid flag specified.\n");
1340                 return ME_ERRNO_INVALID_FLAGS;
1341         }
1342
1343         if (!instance->circ_buf.buf) {
1344                 PERROR("Circular buffer not exists.\n");
1345                 return ME_ERRNO_INTERNAL;
1346         }
1347
1348         if (time_out < 0) {
1349                 PERROR("Invalid time_out specified.\n");
1350                 return ME_ERRNO_INVALID_TIMEOUT;
1351         }
1352
1353         ME_SUBDEVICE_ENTER;
1354
1355         if (me_circ_buf_space(&instance->circ_buf)) {   //The buffer is NOT full.
1356                 *count = me_circ_buf_space(&instance->circ_buf);
1357         } else {                //The buffer is full.
1358                 if (time_out) {
1359                         t = (time_out * HZ) / 1000;
1360
1361                         if (t == 0)
1362                                 t = 1;
1363                 } else {        //Max time.
1364                         t = LONG_MAX;
1365                 }
1366
1367                 *count = 0;
1368
1369                 j = jiffies;
1370
1371                 //Only runing process will interrupt this call. Interrupts are when FIFO HF is signaled.
1372                 wait_event_interruptible_timeout(instance->wait_queue,
1373                                                  ((me_circ_buf_space
1374                                                    (&instance->circ_buf))
1375                                                   || !(inl(instance->status_reg)
1376                                                        &
1377                                                        ME4600_AO_STATUS_BIT_FSM)),
1378                                                  t);
1379
1380                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
1381                         PERROR("AO subdevice is not running.\n");
1382                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
1383                 } else if (signal_pending(current)) {
1384                         PERROR("Wait on values interrupted from signal.\n");
1385                         instance->status = ao_status_none;
1386                         ao_stop_immediately(instance);
1387                         err = ME_ERRNO_SIGNAL;
1388                 } else if ((jiffies - j) >= t) {
1389                         PERROR("Wait on values timed out.\n");
1390                         err = ME_ERRNO_TIMEOUT;
1391                 } else {        //Uff... all is good. Inform user about empty space.
1392                         *count = me_circ_buf_space(&instance->circ_buf);
1393                 }
1394         }
1395
1396         ME_SUBDEVICE_EXIT;
1397
1398         return err;
1399 }
1400
1401 static int me4600_ao_io_stream_start(me_subdevice_t *subdevice,
1402                                      struct file *filep,
1403                                      int start_mode, int time_out, int flags)
1404 {
1405         me4600_ao_subdevice_t *instance;
1406         int err = ME_ERRNO_SUCCESS;
1407         unsigned long cpu_flags = 0;
1408         uint32_t status;
1409         uint32_t ctrl;
1410         uint32_t synch;
1411         int count = 0;
1412         int circ_buffer_count;
1413
1414         unsigned long ref;
1415         unsigned long delay = 0;
1416
1417         instance = (me4600_ao_subdevice_t *) subdevice;
1418
1419         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1420
1421         if (!instance->fifo) {
1422                 PERROR("Not a streaming ao.\n");
1423                 return ME_ERRNO_NOT_SUPPORTED;
1424         }
1425
1426         if (flags & ~ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
1427                 PERROR("Invalid flags.\n");
1428                 return ME_ERRNO_INVALID_FLAGS;
1429         }
1430
1431         if (time_out < 0) {
1432                 PERROR("Invalid timeout specified.\n");
1433                 return ME_ERRNO_INVALID_TIMEOUT;
1434         }
1435
1436         if ((start_mode != ME_START_MODE_BLOCKING)
1437             && (start_mode != ME_START_MODE_NONBLOCKING)) {
1438                 PERROR("Invalid start mode specified.\n");
1439                 return ME_ERRNO_INVALID_START_MODE;
1440         }
1441
1442         if (time_out) {
1443                 delay = (time_out * HZ) / 1000;
1444                 if (delay == 0)
1445                         delay = 1;
1446         }
1447
1448         switch (instance->status) {     //Checking actual mode.
1449         case ao_status_stream_configured:
1450         case ao_status_stream_end:
1451                 //Correct modes!
1452                 break;
1453
1454                 //The device is in wrong mode.
1455         case ao_status_none:
1456         case ao_status_single_configured:
1457         case ao_status_single_run_wait:
1458         case ao_status_single_run:
1459         case ao_status_single_end_wait:
1460                 PERROR
1461                     ("Subdevice must be preinitialize correctly for streaming.\n");
1462                 return ME_ERRNO_PREVIOUS_CONFIG;
1463
1464         case ao_status_stream_fifo_error:
1465         case ao_status_stream_buffer_error:
1466         case ao_status_stream_error:
1467                 PDEBUG("Before restart broke stream 'STOP' must be caled.\n");
1468                 return ME_STATUS_ERROR;
1469
1470         case ao_status_stream_run_wait:
1471         case ao_status_stream_run:
1472         case ao_status_stream_end_wait:
1473                 PDEBUG("Stream is already working.\n");
1474                 return ME_ERRNO_SUBDEVICE_BUSY;
1475
1476         default:
1477                 instance->status = ao_status_stream_error;
1478                 PERROR_CRITICAL("Status is in wrong state!\n");
1479                 return ME_ERRNO_INTERNAL;
1480
1481         }
1482
1483         ME_SUBDEVICE_ENTER;
1484
1485         if (instance->mode == ME4600_AO_CONTINOUS) {    //Continous
1486                 instance->circ_buf.tail += instance->preloaded_count;
1487                 instance->circ_buf.tail &= instance->circ_buf.mask;
1488         }
1489         circ_buffer_count = me_circ_buf_values(&instance->circ_buf);
1490
1491         if (!circ_buffer_count && !instance->preloaded_count) { //No values in buffer
1492                 ME_SUBDEVICE_EXIT;
1493                 PERROR("No values in buffer!\n");
1494                 return ME_ERRNO_LACK_OF_RESOURCES;
1495         }
1496
1497         //Cancel control task
1498         PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx);
1499         instance->ao_control_task_flag = 0;
1500         cancel_delayed_work(&instance->ao_control_task);
1501
1502         //Stop device
1503         err = ao_stop_immediately(instance);
1504         if (err) {
1505                 PERROR_CRITICAL("FSM IS BUSY!\n");
1506                 ME_SUBDEVICE_EXIT;
1507
1508                 return ME_ERRNO_SUBDEVICE_BUSY;
1509         }
1510         //Set values for single_read()
1511         instance->single_value = ME4600_AO_MAX_DATA + 1;
1512         instance->single_value_in_fifo = ME4600_AO_MAX_DATA + 1;
1513
1514         //Setting stop points
1515         if (instance->stop_mode == ME4600_AO_SCAN_STOP_MODE) {
1516                 instance->stop_data_count =
1517                     instance->stop_count * circ_buffer_count;
1518         } else {
1519                 instance->stop_data_count = instance->stop_count;
1520         }
1521
1522         if ((instance->stop_data_count != 0)
1523             && (instance->stop_data_count < circ_buffer_count)) {
1524                 PERROR("More data in buffer than previously set limit!\n");
1525         }
1526
1527         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
1528         ctrl = inl(instance->ctrl_reg);
1529         //Check FIFO
1530         if (!(ctrl & ME4600_AO_CTRL_BIT_ENABLE_FIFO)) { //FIFO wasn't enabeled. Do it. <= This should be done by user call with ME_WRITE_MODE_PRELOAD
1531                 PINFO("Enableing FIFO.\n");
1532                 ctrl |=
1533                     ME4600_AO_CTRL_BIT_ENABLE_FIFO |
1534                     ME4600_AO_CTRL_BIT_RESET_IRQ;
1535
1536                 instance->preloaded_count = 0;
1537                 instance->data_count = 0;
1538         } else {                //Block IRQ
1539                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
1540         }
1541         outl(ctrl, instance->ctrl_reg);
1542         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1543                    instance->ctrl_reg - instance->reg_base,
1544                    ctrl | ME4600_AO_CTRL_BIT_RESET_IRQ);
1545
1546         //Fill FIFO <= Generaly this should be done by user pre-load call but this is second place to do it.
1547         status = inl(instance->status_reg);
1548         if (!(status & ME4600_AO_STATUS_BIT_EF)) {      //FIFO empty
1549                 if (instance->stop_data_count == 0) {
1550                         count = ME4600_AO_FIFO_COUNT;
1551                 } else {
1552                         count =
1553                             (ME4600_AO_FIFO_COUNT <
1554                              instance->
1555                              stop_data_count) ? ME4600_AO_FIFO_COUNT :
1556                             instance->stop_data_count;
1557                 }
1558
1559                 //Copy data
1560                 count =
1561                     ao_write_data(instance, count, instance->preloaded_count);
1562
1563                 if (count < 0) {        //This should never happend!
1564                         PERROR_CRITICAL("COPY FINISH WITH ERROR!\n");
1565                         spin_unlock_irqrestore(&instance->subdevice_lock,
1566                                                cpu_flags);
1567                         ME_SUBDEVICE_EXIT;
1568                         return ME_ERRNO_INTERNAL;
1569                 }
1570         }
1571         //Set pre-load features.
1572         spin_lock(instance->preload_reg_lock);
1573         synch = inl(instance->preload_reg);
1574         synch &=
1575             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->
1576               ao_idx);
1577         synch |=
1578             (instance->start_mode & ~ME4600_AO_EXT_TRIG) << instance->ao_idx;
1579         outl(synch, instance->preload_reg);
1580         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1581                    instance->preload_reg - instance->reg_base, synch);
1582         spin_unlock(instance->preload_reg_lock);
1583
1584         //Default count is '0'
1585         if (instance->mode == ME4600_AO_CONTINOUS) {    //Continous
1586                 instance->preloaded_count = 0;
1587                 instance->circ_buf.tail += count;
1588                 instance->circ_buf.tail &= instance->circ_buf.mask;
1589         } else {                //Wraparound
1590                 instance->preloaded_count += count;
1591                 instance->data_count += count;
1592
1593                 //Special case: Infinite wraparound with less than FIFO datas always should runs in hardware mode.
1594                 if ((instance->stop_mode == ME4600_AO_INF_STOP_MODE)
1595                     && (circ_buffer_count <= ME4600_AO_FIFO_COUNT)) {   //Change to hardware wraparound
1596                         PDEBUG
1597                             ("Changeing mode from software wraparound to hardware wraparound.\n");
1598                         //Copy all data
1599                         count =
1600                             ao_write_data(instance, circ_buffer_count,
1601                                           instance->preloaded_count);
1602                         ctrl &= ~ME4600_AO_CTRL_MODE_MASK;
1603                         ctrl |= ME4600_AO_MODE_WRAPAROUND;
1604                 }
1605
1606                 if (instance->preloaded_count == me_circ_buf_values(&instance->circ_buf)) {     //Reset position indicator.
1607                         instance->preloaded_count = 0;
1608                 } else if (instance->preloaded_count > me_circ_buf_values(&instance->circ_buf)) {       //This should never happend!
1609                         PERROR_CRITICAL
1610                             ("PRELOADED MORE VALUES THAN ARE IN BUFFER!\n");
1611                         spin_unlock_irqrestore(&instance->subdevice_lock,
1612                                                cpu_flags);
1613                         ME_SUBDEVICE_EXIT;
1614                         return ME_ERRNO_INTERNAL;
1615                 }
1616         }
1617
1618         //Set status to 'wait for start'
1619         instance->status = ao_status_stream_run_wait;
1620
1621         status = inl(instance->status_reg);
1622         //Start state machine and interrupts
1623         ctrl &= ~(ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
1624         if (instance->start_mode == ME4600_AO_EXT_TRIG) {       // External trigger.
1625                 PINFO("External trigger.\n");
1626                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
1627         }
1628         if (!(status & ME4600_AO_STATUS_BIT_HF)) {      //More than half!
1629                 if ((ctrl & ME4600_AO_CTRL_MODE_MASK) == ME4600_AO_MODE_CONTINUOUS) {   //Enable IRQ only when hardware_continous is set and FIFO is more than half
1630                         ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
1631                         ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
1632                 }
1633         }
1634         outl(ctrl, instance->ctrl_reg);
1635         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1636                    instance->ctrl_reg - instance->reg_base, ctrl);
1637         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
1638
1639         //Trigger output
1640         if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {       //Trigger outputs
1641                 spin_lock(instance->preload_reg_lock);
1642                 synch = inl(instance->preload_reg);
1643                 //Add channel to start list
1644                 outl(synch | (ME4600_AO_SYNC_HOLD << instance->ao_idx),
1645                      instance->preload_reg);
1646                 PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
1647                            instance->reg_base,
1648                            instance->preload_reg - instance->reg_base,
1649                            synch | (ME4600_AO_SYNC_HOLD << instance->ao_idx));
1650
1651                 //Fire
1652                 PINFO
1653                     ("Fired all software synchronous outputs by software trigger.\n");
1654                 outl(0x8000, instance->single_reg);
1655                 PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
1656                            instance->reg_base,
1657                            instance->single_reg - instance->reg_base, 0x8000);
1658
1659                 //Restore save settings
1660                 outl(synch, instance->preload_reg);
1661                 PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
1662                            instance->reg_base,
1663                            instance->preload_reg - instance->reg_base, synch);
1664                 spin_unlock(instance->preload_reg_lock);
1665         } else if (!instance->start_mode) {     //Trigger outputs
1666 /*
1667                 //Remove channel from start list.       // <== Unnecessary. Removed.
1668                 spin_lock(instance->preload_reg_lock);
1669                         synch = inl(instance->preload_reg);
1670                         outl(synch & ~(ME4600_AO_SYNC_HOLD << instance->ao_idx), instance->preload_reg);
1671                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, synch & ~(ME4600_AO_SYNC_HOLD << instance->ao_idx));
1672 */
1673                 //Fire
1674                 PINFO("Software trigger.\n");
1675                 outl(0x8000, instance->single_reg);
1676                 PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
1677                            instance->reg_base,
1678                            instance->single_reg - instance->reg_base, 0x8000);
1679
1680 /*
1681                         //Restore save settings.        // <== Unnecessary. Removed.
1682                         outl(synch, instance->preload_reg);
1683                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, synch);
1684                 spin_unlock(instance->preload_reg_lock);
1685 */
1686         }
1687         // Set control task's timeout
1688         ref = jiffies;
1689         instance->timeout.delay = delay;
1690         instance->timeout.start_time = ref;
1691
1692         if (status & ME4600_AO_STATUS_BIT_HF) { //Less than half but not empty!
1693                 PINFO("Less than half.\n");
1694                 if (instance->stop_data_count != 0) {
1695                         count = ME4600_AO_FIFO_COUNT / 2;
1696                 } else {
1697                         count =
1698                             ((ME4600_AO_FIFO_COUNT / 2) <
1699                              instance->stop_data_count) ? ME4600_AO_FIFO_COUNT /
1700                             2 : instance->stop_data_count;
1701                 }
1702
1703                 //Copy data
1704                 count =
1705                     ao_write_data(instance, count, instance->preloaded_count);
1706
1707                 if (count < 0) {        //This should never happend!
1708                         PERROR_CRITICAL("COPY FINISH WITH ERROR!\n");
1709                         ME_SUBDEVICE_EXIT;
1710                         return ME_ERRNO_INTERNAL;
1711                 }
1712
1713                 if (instance->mode == ME4600_AO_CONTINOUS) {    //Continous
1714                         instance->circ_buf.tail += count;
1715                         instance->circ_buf.tail &= instance->circ_buf.mask;
1716                 } else {        //Wraparound
1717                         instance->data_count += count;
1718                         instance->preloaded_count += count;
1719
1720                         if (instance->preloaded_count == me_circ_buf_values(&instance->circ_buf)) {     //Reset position indicator.
1721                                 instance->preloaded_count = 0;
1722                         } else if (instance->preloaded_count > me_circ_buf_values(&instance->circ_buf)) {       //This should never happend!
1723                                 PERROR_CRITICAL
1724                                     ("PRELOADED MORE VALUES THAN ARE IN BUFFER!\n");
1725                                 ME_SUBDEVICE_EXIT;
1726                                 return ME_ERRNO_INTERNAL;
1727                         }
1728                 }
1729
1730                 status = inl(instance->status_reg);
1731                 if (!(status & ME4600_AO_STATUS_BIT_HF)) {      //More than half!
1732                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
1733                         ctrl = inl(instance->ctrl_reg);
1734                         ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
1735                         ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
1736                         outl(ctrl, instance->ctrl_reg);
1737                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
1738                                    instance->reg_base,
1739                                    instance->ctrl_reg - instance->reg_base,
1740                                    ctrl);
1741                         spin_unlock_irqrestore(&instance->subdevice_lock,
1742                                                cpu_flags);
1743                 }
1744         }
1745         //Special case: Limited wraparound with less than HALF FIFO datas need work around to generate first interrupt.
1746         if ((instance->stop_mode != ME4600_AO_INF_STOP_MODE)
1747             && (instance->mode == ME4600_AO_SW_WRAP_MODE)
1748             && (circ_buffer_count <= (ME4600_AO_FIFO_COUNT / 2))) {     //Put more data to FIFO
1749                 PINFO("Limited wraparound with less than HALF FIFO datas.\n");
1750                 if (instance->preloaded_count) {        //This should never happend!
1751                         PERROR_CRITICAL
1752                             ("ERROR WHEN LOADING VALUES FOR WRAPAROUND!\n");
1753                         ME_SUBDEVICE_EXIT;
1754                         return ME_ERRNO_INTERNAL;
1755                 }
1756
1757                 while (instance->stop_data_count > instance->data_count) {      //Maximum data not set jet.
1758                         //Copy to buffer
1759                         if (circ_buffer_count != ao_write_data(instance, circ_buffer_count, 0)) {       //This should never happend!
1760                                 PERROR_CRITICAL
1761                                     ("ERROR WHEN LOADING VALUES FOR WRAPAROUND!\n");
1762                                 ME_SUBDEVICE_EXIT;
1763                                 return ME_ERRNO_INTERNAL;
1764                         }
1765                         instance->data_count += circ_buffer_count;
1766
1767                         if (!((status = inl(instance->status_reg)) & ME4600_AO_STATUS_BIT_HF)) {        //FIFO is more than half. Enable IRQ and end copy.
1768                                 spin_lock_irqsave(&instance->subdevice_lock,
1769                                                   cpu_flags);
1770                                 ctrl = inl(instance->ctrl_reg);
1771                                 ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
1772                                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
1773                                 outl(ctrl, instance->ctrl_reg);
1774                                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
1775                                            instance->reg_base,
1776                                            instance->ctrl_reg -
1777                                            instance->reg_base, ctrl);
1778                                 spin_unlock_irqrestore(&instance->
1779                                                        subdevice_lock,
1780                                                        cpu_flags);
1781                                 break;
1782                         }
1783                 }
1784         }
1785         // Schedule control task.
1786         instance->ao_control_task_flag = 1;
1787         queue_delayed_work(instance->me4600_workqueue,
1788                            &instance->ao_control_task, 1);
1789
1790         if (start_mode == ME_START_MODE_BLOCKING) {     //Wait for start.
1791                 //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason.
1792                 wait_event_interruptible_timeout(instance->wait_queue,
1793                                                  (instance->status !=
1794                                                   ao_status_stream_run_wait),
1795                                                  (delay) ? delay +
1796                                                  1 : LONG_MAX);
1797
1798                 if ((instance->status != ao_status_stream_run)
1799                     && (instance->status != ao_status_stream_end)) {
1800                         PDEBUG("Starting stream canceled. %d\n",
1801                                instance->status);
1802                         err = ME_ERRNO_CANCELLED;
1803                 }
1804
1805                 if (signal_pending(current)) {
1806                         PERROR("Wait on start of state machine interrupted.\n");
1807                         instance->status = ao_status_none;
1808                         ao_stop_immediately(instance);
1809                         err = ME_ERRNO_SIGNAL;
1810                 } else if ((delay) && ((jiffies - ref) >= delay)) {
1811                         if (instance->status != ao_status_stream_run) {
1812                                 if (instance->status == ao_status_stream_end) {
1813                                         PDEBUG("Timeout reached.\n");
1814                                 } else {
1815                                         if ((jiffies - ref) > delay) {
1816                                                 PERROR
1817                                                     ("Timeout reached. Not handled by control task!\n");
1818                                         } else {
1819                                                 PERROR
1820                                                     ("Timeout reached. Signal come but status is strange: %d\n",
1821                                                      instance->status);
1822                                         }
1823                                         ao_stop_immediately(instance);
1824                                 }
1825
1826                                 instance->ao_control_task_flag = 0;
1827                                 cancel_delayed_work(&instance->ao_control_task);
1828                                 instance->status = ao_status_stream_end;
1829                                 err = ME_ERRNO_TIMEOUT;
1830                         }
1831                 }
1832         }
1833
1834         ME_SUBDEVICE_EXIT;
1835         return err;
1836 }
1837
1838 static int me4600_ao_io_stream_status(me_subdevice_t *subdevice,
1839                                       struct file *filep,
1840                                       int wait,
1841                                       int *status, int *values, int flags)
1842 {
1843         me4600_ao_subdevice_t *instance;
1844         int err = ME_ERRNO_SUCCESS;
1845
1846         instance = (me4600_ao_subdevice_t *) subdevice;
1847
1848         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1849
1850         if (!instance->fifo) {
1851                 PERROR("Not a streaming ao.\n");
1852                 return ME_ERRNO_NOT_SUPPORTED;
1853         }
1854
1855         if (flags) {
1856                 PERROR("Invalid flag specified.\n");
1857                 return ME_ERRNO_INVALID_FLAGS;
1858         }
1859
1860         if ((wait != ME_WAIT_NONE) && (wait != ME_WAIT_IDLE)) {
1861                 PERROR("Invalid wait argument specified.\n");
1862                 *status = ME_STATUS_INVALID;
1863                 return ME_ERRNO_INVALID_WAIT;
1864         }
1865
1866         ME_SUBDEVICE_ENTER;
1867
1868         switch (instance->status) {
1869         case ao_status_single_configured:
1870         case ao_status_single_end:
1871         case ao_status_stream_configured:
1872         case ao_status_stream_end:
1873         case ao_status_stream_fifo_error:
1874         case ao_status_stream_buffer_error:
1875         case ao_status_stream_error:
1876                 *status = ME_STATUS_IDLE;
1877                 break;
1878
1879         case ao_status_single_run_wait:
1880         case ao_status_single_run:
1881         case ao_status_single_end_wait:
1882         case ao_status_stream_run_wait:
1883         case ao_status_stream_run:
1884         case ao_status_stream_end_wait:
1885                 *status = ME_STATUS_BUSY;
1886                 break;
1887
1888         case ao_status_none:
1889         default:
1890                 *status =
1891                     (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ?
1892                     ME_STATUS_BUSY : ME_STATUS_IDLE;
1893                 break;
1894         }
1895
1896         if ((wait == ME_WAIT_IDLE) && (*status == ME_STATUS_BUSY)) {
1897                 //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason.
1898                 wait_event_interruptible_timeout(instance->wait_queue,
1899                                                  ((instance->status !=
1900                                                    ao_status_single_run_wait)
1901                                                   && (instance->status !=
1902                                                       ao_status_single_run)
1903                                                   && (instance->status !=
1904                                                       ao_status_single_end_wait)
1905                                                   && (instance->status !=
1906                                                       ao_status_stream_run_wait)
1907                                                   && (instance->status !=
1908                                                       ao_status_stream_run)
1909                                                   && (instance->status !=
1910                                                       ao_status_stream_end_wait)),
1911                                                  LONG_MAX);
1912
1913                 if (instance->status != ao_status_stream_end) {
1914                         PDEBUG("Wait for IDLE canceled. %d\n",
1915                                instance->status);
1916                         err = ME_ERRNO_CANCELLED;
1917                 }
1918
1919                 if (signal_pending(current)) {
1920                         PERROR("Wait for IDLE interrupted.\n");
1921                         instance->status = ao_status_none;
1922                         ao_stop_immediately(instance);
1923                         err = ME_ERRNO_SIGNAL;
1924                 }
1925
1926                 *status = ME_STATUS_IDLE;
1927         }
1928
1929         *values = me_circ_buf_space(&instance->circ_buf);
1930
1931         ME_SUBDEVICE_EXIT;
1932
1933         return err;
1934 }
1935
1936 static int me4600_ao_io_stream_stop(me_subdevice_t *subdevice,
1937                                     struct file *filep,
1938                                     int stop_mode, int flags)
1939 {                               // Stop work and empty buffer and FIFO
1940         int err = ME_ERRNO_SUCCESS;
1941         me4600_ao_subdevice_t *instance;
1942         unsigned long cpu_flags;
1943         volatile uint32_t ctrl;
1944
1945         instance = (me4600_ao_subdevice_t *) subdevice;
1946
1947         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1948
1949         if (flags & ~ME_IO_STREAM_STOP_PRESERVE_BUFFERS) {
1950                 PERROR("Invalid flag specified.\n");
1951                 return ME_ERRNO_INVALID_FLAGS;
1952         }
1953
1954         if ((stop_mode != ME_STOP_MODE_IMMEDIATE)
1955             && (stop_mode != ME_STOP_MODE_LAST_VALUE)) {
1956                 PERROR("Invalid stop mode specified.\n");
1957                 return ME_ERRNO_INVALID_STOP_MODE;
1958         }
1959
1960         if (!instance->fifo) {
1961                 PERROR("Not a streaming ao.\n");
1962                 return ME_ERRNO_NOT_SUPPORTED;
1963         }
1964
1965         if (instance->status < ao_status_stream_configured) {
1966                 //There is nothing to stop!
1967                 PERROR("Subdevice not in streaming mode. %d\n",
1968                        instance->status);
1969                 return ME_ERRNO_PREVIOUS_CONFIG;
1970         }
1971
1972         ME_SUBDEVICE_ENTER;
1973
1974         //Mark as stopping. => Software stop.
1975         instance->status = ao_status_stream_end_wait;
1976
1977         if (stop_mode == ME_STOP_MODE_IMMEDIATE) {      //Stopped now!
1978                 err = ao_stop_immediately(instance);
1979         } else if (stop_mode == ME_STOP_MODE_LAST_VALUE) {
1980                 ctrl = inl(instance->ctrl_reg) & ME4600_AO_CTRL_MODE_MASK;
1981                 if (ctrl == ME4600_AO_MODE_WRAPAROUND) {        //Hardware wraparound => Hardware stop.
1982                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
1983                         ctrl = inl(instance->ctrl_reg);
1984                         ctrl |=
1985                             ME4600_AO_CTRL_BIT_STOP |
1986                             ME4600_AO_CTRL_BIT_RESET_IRQ;
1987                         ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
1988                         outl(ctrl, instance->ctrl_reg);
1989                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
1990                                    instance->reg_base,
1991                                    instance->ctrl_reg - instance->reg_base,
1992                                    ctrl);
1993                         spin_unlock_irqrestore(&instance->subdevice_lock,
1994                                                cpu_flags);
1995                 }
1996                 //Only runing process will interrupt this call. Events are signaled when status change.
1997                 wait_event_interruptible_timeout(instance->wait_queue,
1998                                                  (instance->status !=
1999                                                   ao_status_stream_end_wait),
2000                                                  LONG_MAX);
2001
2002                 if (instance->status != ao_status_stream_end) {
2003                         PDEBUG("Stopping stream canceled.\n");
2004                         err = ME_ERRNO_CANCELLED;
2005                 }
2006
2007                 if (signal_pending(current)) {
2008                         PERROR("Stopping stream interrupted.\n");
2009                         instance->status = ao_status_none;
2010                         ao_stop_immediately(instance);
2011                         err = ME_ERRNO_SIGNAL;
2012                 }
2013         }
2014
2015         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2016         ctrl = inl(instance->ctrl_reg);
2017         ctrl |=
2018             ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP |
2019             ME4600_AO_CTRL_BIT_RESET_IRQ;
2020         ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2021         if (!flags) {           //Reset FIFO
2022                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_FIFO;
2023         }
2024         outl(ctrl, instance->ctrl_reg);
2025         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
2026                    instance->ctrl_reg - instance->reg_base, ctrl);
2027         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
2028
2029         if (!flags) {           //Reset software buffer
2030                 instance->circ_buf.head = 0;
2031                 instance->circ_buf.tail = 0;
2032                 instance->preloaded_count = 0;
2033                 instance->data_count = 0;
2034         }
2035
2036         ME_SUBDEVICE_EXIT;
2037
2038         return err;
2039 }
2040
2041 static int me4600_ao_io_stream_write(me_subdevice_t *subdevice,
2042                                      struct file *filep,
2043                                      int write_mode,
2044                                      int *values, int *count, int flags)
2045 {
2046         int err = ME_ERRNO_SUCCESS;
2047         me4600_ao_subdevice_t *instance;
2048         unsigned long cpu_flags = 0;
2049         uint32_t reg_copy;
2050
2051         int copied_from_user = 0;
2052         int left_to_copy_from_user = *count;
2053
2054         int copied_values;
2055
2056         instance = (me4600_ao_subdevice_t *) subdevice;
2057
2058         PDEBUG("executed. idx=%d\n", instance->ao_idx);
2059
2060         //Checking arguments
2061         if (!instance->fifo) {
2062                 PERROR("Not a streaming ao.\n");
2063                 return ME_ERRNO_NOT_SUPPORTED;
2064         }
2065
2066         if (flags) {
2067                 PERROR("Invalid flag specified.\n");
2068                 return ME_ERRNO_INVALID_FLAGS;
2069         }
2070
2071         if (*count <= 0) {
2072                 PERROR("Invalid count of values specified.\n");
2073                 return ME_ERRNO_INVALID_VALUE_COUNT;
2074         }
2075
2076         if (values == NULL) {
2077                 PERROR("Invalid address of values specified.\n");
2078                 return ME_ERRNO_INVALID_POINTER;
2079         }
2080
2081         if ((instance->status == ao_status_none) || (instance->status == ao_status_single_configured)) {        //The device is in single mode.
2082                 PERROR
2083                     ("Subdevice must be preinitialize correctly for streaming.\n");
2084                 return ME_ERRNO_PREVIOUS_CONFIG;
2085         }
2086 /// @note If no 'pre-load' is used. stream_start() will move data to FIFO.
2087         switch (write_mode) {
2088         case ME_WRITE_MODE_PRELOAD:
2089
2090                 //Device must be stopped.
2091                 if ((instance->status != ao_status_stream_configured)
2092                     && (instance->status != ao_status_stream_end)) {
2093                         PERROR
2094                             ("Subdevice mustn't be runing when 'pre-load' mode is used.\n");
2095                         return ME_ERRNO_PREVIOUS_CONFIG;
2096                 }
2097                 break;
2098         case ME_WRITE_MODE_NONBLOCKING:
2099         case ME_WRITE_MODE_BLOCKING:
2100                 /// @note In blocking mode: When device is not runing and there is not enought space call will blocked up!
2101                 /// @note Some other thread must empty buffer by starting engine.
2102                 break;
2103
2104         default:
2105                 PERROR("Invalid write mode specified.\n");
2106                 return ME_ERRNO_INVALID_WRITE_MODE;
2107         }
2108
2109         if (instance->mode & ME4600_AO_WRAP_MODE) {     //Wraparound mode. Device must be stopped.
2110                 if ((instance->status != ao_status_stream_configured)
2111                     && (instance->status != ao_status_stream_end)) {
2112                         PERROR
2113                             ("Subdevice mustn't be runing when 'pre-load' mode is used.\n");
2114                         return ME_ERRNO_INVALID_WRITE_MODE;
2115                 }
2116         }
2117
2118         if ((instance->mode == ME4600_AO_HW_WRAP_MODE) && (write_mode != ME_WRITE_MODE_PRELOAD)) {      // hardware wrap_around mode.
2119                 //This is transparent for user.
2120                 PDEBUG("Changing write_mode to ME_WRITE_MODE_PRELOAD.\n");
2121                 write_mode = ME_WRITE_MODE_PRELOAD;
2122         }
2123
2124         ME_SUBDEVICE_ENTER;
2125
2126         if (write_mode == ME_WRITE_MODE_PRELOAD) {      //Init enviroment - preload
2127                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2128                 reg_copy = inl(instance->ctrl_reg);
2129                 //Check FIFO
2130                 if (!(reg_copy & ME4600_AO_CTRL_BIT_ENABLE_FIFO)) {     //FIFO not active. Enable it.
2131                         reg_copy |= ME4600_AO_CTRL_BIT_ENABLE_FIFO;
2132                         outl(reg_copy, instance->ctrl_reg);
2133                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2134                                    instance->reg_base,
2135                                    instance->ctrl_reg - instance->reg_base,
2136                                    reg_copy);
2137                         instance->preloaded_count = 0;
2138                 }
2139                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
2140         }
2141
2142         while (1) {
2143                 //Copy to buffer. This step is common for all modes.
2144                 copied_from_user =
2145                     ao_get_data_from_user(instance, left_to_copy_from_user,
2146                                           values + (*count -
2147                                                     left_to_copy_from_user));
2148                 left_to_copy_from_user -= copied_from_user;
2149
2150                 reg_copy = inl(instance->status_reg);
2151                 if ((instance->status == ao_status_stream_run) && !(reg_copy & ME4600_AO_STATUS_BIT_FSM)) {     //BROKEN PIPE! The state machine is stoped but logical status show that should be working.
2152                         PERROR("Broken pipe in write.\n");
2153                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
2154                         break;
2155                 }
2156
2157                 if ((instance->status == ao_status_stream_run) && (instance->mode == ME4600_AO_CONTINOUS) && (reg_copy & ME4600_AO_STATUS_BIT_HF)) {    //Continous mode runing and data are below half!
2158
2159                         // Block interrupts.
2160                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2161                         reg_copy = inl(instance->ctrl_reg);
2162                         //reg_copy &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2163                         reg_copy |= ME4600_AO_CTRL_BIT_RESET_IRQ;
2164                         outl(reg_copy, instance->ctrl_reg);
2165                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2166                                    instance->reg_base,
2167                                    instance->ctrl_reg - instance->reg_base,
2168                                    reg_copy);
2169                         spin_unlock_irqrestore(&instance->subdevice_lock,
2170                                                cpu_flags);
2171
2172                         //Fast copy
2173                         copied_values =
2174                             ao_write_data(instance, ME4600_AO_FIFO_COUNT / 2,
2175                                           0);
2176                         if (copied_values > 0) {
2177                                 instance->circ_buf.tail += copied_values;
2178                                 instance->circ_buf.tail &=
2179                                     instance->circ_buf.mask;
2180                                 continue;
2181                         }
2182                         // Activate interrupts.
2183                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2184                         reg_copy = inl(instance->ctrl_reg);
2185                         //reg_copy |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2186                         reg_copy &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
2187                         outl(reg_copy, instance->ctrl_reg);
2188                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2189                                    instance->reg_base,
2190                                    instance->ctrl_reg - instance->reg_base,
2191                                    reg_copy);
2192                         spin_unlock_irqrestore(&instance->subdevice_lock,
2193                                                cpu_flags);
2194
2195                         if (copied_values == 0) {       //This was checked and never should happend!
2196                                 PERROR_CRITICAL("COPING FINISH WITH 0!\n");
2197                         }
2198
2199                         if (copied_values < 0) {        //This was checked and never should happend!
2200                                 PERROR_CRITICAL
2201                                     ("COPING FINISH WITH AN ERROR!\n");
2202                                 instance->status = ao_status_stream_fifo_error;
2203                                 err = ME_ERRNO_FIFO_BUFFER_OVERFLOW;
2204                                 break;
2205                         }
2206                 }
2207
2208                 if (!left_to_copy_from_user) {  //All datas were copied.
2209                         break;
2210                 } else {        //Not all datas were copied.
2211                         if (instance->mode & ME4600_AO_WRAP_MODE) {     //Error too much datas! Wraparound is limited in size!
2212                                 PERROR
2213                                     ("Too much data for wraparound mode!  Exceeded size of %ld.\n",
2214                                      ME4600_AO_CIRC_BUF_COUNT - 1);
2215                                 err = ME_ERRNO_RING_BUFFER_OVERFLOW;
2216                                 break;
2217                         }
2218
2219                         if (write_mode != ME_WRITE_MODE_BLOCKING) {     //Non blocking calls
2220                                 break;
2221                         }
2222
2223                         wait_event_interruptible(instance->wait_queue,
2224                                                  me_circ_buf_space(&instance->
2225                                                                    circ_buf));
2226
2227                         if (signal_pending(current)) {
2228                                 PERROR("Writing interrupted by signal.\n");
2229                                 instance->status = ao_status_none;
2230                                 ao_stop_immediately(instance);
2231                                 err = ME_ERRNO_SIGNAL;
2232                                 break;
2233                         }
2234
2235                         if (instance->status == ao_status_none) {       //Reset
2236                                 PERROR("Writing interrupted by reset.\n");
2237                                 err = ME_ERRNO_CANCELLED;
2238                                 break;
2239                         }
2240                 }
2241         }
2242
2243         if (write_mode == ME_WRITE_MODE_PRELOAD) {      //Copy data to FIFO - preload
2244                 copied_values =
2245                     ao_write_data_pooling(instance, ME4600_AO_FIFO_COUNT,
2246                                           instance->preloaded_count);
2247                 instance->preloaded_count += copied_values;
2248                 instance->data_count += copied_values;
2249
2250                 if ((instance->mode == ME4600_AO_HW_WRAP_MODE)
2251                     && (me_circ_buf_values(&instance->circ_buf) >
2252                         ME4600_AO_FIFO_COUNT)) {
2253                         PERROR
2254                             ("Too much data for hardware wraparound mode! Exceeded size of %d.\n",
2255                              ME4600_AO_FIFO_COUNT);
2256                         err = ME_ERRNO_FIFO_BUFFER_OVERFLOW;
2257                 }
2258         }
2259
2260         *count = *count - left_to_copy_from_user;
2261         ME_SUBDEVICE_EXIT;
2262
2263         return err;
2264 }
2265 static irqreturn_t me4600_ao_isr(int irq, void *dev_id)
2266 {
2267         me4600_ao_subdevice_t *instance = dev_id;
2268         uint32_t irq_status;
2269         uint32_t ctrl;
2270         uint32_t status;
2271         int count = 0;
2272
2273         PDEBUG("executed. idx=%d\n", instance->ao_idx);
2274
2275         if (irq != instance->irq) {
2276                 PERROR("Incorrect interrupt num: %d.\n", irq);
2277                 return IRQ_NONE;
2278         }
2279
2280         irq_status = inl(instance->irq_status_reg);
2281         if (!(irq_status & (ME4600_IRQ_STATUS_BIT_AO_HF << instance->ao_idx))) {
2282                 PINFO("%ld Shared interrupt. %s(): ID=%d: status_reg=0x%04X\n",
2283                       jiffies, __func__, instance->ao_idx, irq_status);
2284                 return IRQ_NONE;
2285         }
2286
2287         if (!instance->circ_buf.buf) {
2288                 instance->status = ao_status_stream_error;
2289                 PERROR_CRITICAL("CIRCULAR BUFFER NOT EXISTS!\n");
2290                 //Block interrupts. Stop machine.
2291                 ctrl = inl(instance->ctrl_reg);
2292                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2293                 ctrl |=
2294                     ME4600_AO_CTRL_BIT_RESET_IRQ |
2295                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_STOP;
2296                 outl(ctrl, instance->ctrl_reg);
2297                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2298                            instance->reg_base,
2299                            instance->ctrl_reg - instance->reg_base, ctrl);
2300
2301                 //Inform user
2302                 wake_up_interruptible_all(&instance->wait_queue);
2303                 return IRQ_HANDLED;
2304         }
2305
2306         status = inl(instance->status_reg);
2307         if (!(status & ME4600_AO_STATUS_BIT_FSM)) {     //Too late. Not working! END? BROKEN PIPE?
2308                 PDEBUG("Interrupt come but ISM is not working!\n");
2309                 //Block interrupts. Stop machine.
2310                 ctrl = inl(instance->ctrl_reg);
2311                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2312                 ctrl |=
2313                     ME4600_AO_CTRL_BIT_RESET_IRQ | ME4600_AO_CTRL_BIT_STOP |
2314                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
2315                 outl(ctrl, instance->ctrl_reg);
2316                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2317                            instance->reg_base,
2318                            instance->ctrl_reg - instance->reg_base, ctrl);
2319
2320                 return IRQ_HANDLED;
2321         }
2322         //General procedure. Process more datas.
2323
2324 #ifdef MEDEBUG_DEBUG
2325         if (!me_circ_buf_values(&instance->circ_buf)) { //Buffer is empty!
2326                 PDEBUG("Circular buffer empty!\n");
2327         }
2328 #endif
2329
2330         //Check FIFO
2331         if (status & ME4600_AO_STATUS_BIT_HF) { //OK less than half
2332
2333                 //Block interrupts
2334                 ctrl = inl(instance->ctrl_reg);
2335                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2336                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
2337                 outl(ctrl, instance->ctrl_reg);
2338                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2339                            instance->reg_base,
2340                            instance->ctrl_reg - instance->reg_base, ctrl);
2341
2342                 do {
2343                         //Calculate how many should be copied.
2344                         count =
2345                             (instance->stop_data_count) ? instance->
2346                             stop_data_count -
2347                             instance->data_count : ME4600_AO_FIFO_COUNT / 2;
2348                         if (ME4600_AO_FIFO_COUNT / 2 < count) {
2349                                 count = ME4600_AO_FIFO_COUNT / 2;
2350                         }
2351                         //Copy data
2352                         if (instance->mode == ME4600_AO_CONTINOUS) {    //Continous
2353                                 count = ao_write_data(instance, count, 0);
2354                                 if (count > 0) {
2355                                         instance->circ_buf.tail += count;
2356                                         instance->circ_buf.tail &=
2357                                             instance->circ_buf.mask;
2358                                         instance->data_count += count;
2359
2360                                         if ((instance->status == ao_status_stream_end_wait) && !me_circ_buf_values(&instance->circ_buf)) {      //Stoping. Whole buffer was copied.
2361                                                 break;
2362                                         }
2363                                 }
2364                         } else if ((instance->mode == ME4600_AO_SW_WRAP_MODE) && ((ctrl & ME4600_AO_CTRL_MODE_MASK) == ME4600_AO_MODE_CONTINUOUS)) {    //Wraparound (software)
2365                                 if (instance->status == ao_status_stream_end_wait) {    //We stoping => Copy to the end of the buffer.
2366                                         count =
2367                                             ao_write_data(instance, count, 0);
2368                                 } else {        //Copy in wraparound mode.
2369                                         count =
2370                                             ao_write_data_wraparound(instance,
2371                                                                      count,
2372                                                                      instance->
2373                                                                      preloaded_count);
2374                                 }
2375
2376                                 if (count > 0) {
2377                                         instance->data_count += count;
2378                                         instance->preloaded_count += count;
2379                                         instance->preloaded_count %=
2380                                             me_circ_buf_values(&instance->
2381                                                                circ_buf);
2382
2383                                         if ((instance->status == ao_status_stream_end_wait) && !instance->preloaded_count) {    //Stoping. Whole buffer was copied.
2384                                                 break;
2385                                         }
2386                                 }
2387                         }
2388
2389                         if ((count <= 0) || (instance->stop_data_count && (instance->stop_data_count <= instance->data_count))) {       //End of work.
2390                                 break;
2391                         }
2392                 }               //Repeat if still is under half fifo
2393                 while ((status =
2394                         inl(instance->status_reg)) & ME4600_AO_STATUS_BIT_HF);
2395
2396                 //Unblock interrupts
2397                 ctrl = inl(instance->ctrl_reg);
2398                 if (count >= 0) {       //Copy was successful.
2399                         if (instance->stop_data_count && (instance->stop_data_count <= instance->data_count)) { //Finishing work. No more interrupts.
2400                                 PDEBUG("Finishing work. Interrupt disabled.\n");
2401                                 instance->status = ao_status_stream_end_wait;
2402                         } else if (count > 0) { //Normal work. Enable interrupt.
2403                                 PDEBUG("Normal work. Enable interrupt.\n");
2404                                 ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
2405                                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2406                         } else {        //Normal work but there are no more data in buffer. Interrupt active but blocked. stream_write() will unblock it.
2407                                 PDEBUG
2408                                     ("No data in software buffer. Interrupt blocked.\n");
2409                                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2410                         }
2411                 } else {        //Error during copy.
2412                         instance->status = ao_status_stream_fifo_error;
2413                 }
2414
2415                 outl(ctrl, instance->ctrl_reg);
2416                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2417                            instance->reg_base,
2418                            instance->ctrl_reg - instance->reg_base, ctrl);
2419         } else {                //?? more than half
2420                 PDEBUG
2421                     ("Interrupt come but FIFO more than half full! Reset interrupt.\n");
2422                 //Reset pending interrupt
2423                 ctrl = inl(instance->ctrl_reg);
2424                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
2425                 outl(ctrl, instance->ctrl_reg);
2426                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2427                            instance->reg_base,
2428                            instance->ctrl_reg - instance->reg_base, ctrl);
2429                 ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
2430                 outl(ctrl, instance->ctrl_reg);
2431                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2432                            instance->reg_base,
2433                            instance->ctrl_reg - instance->reg_base, ctrl);
2434         }
2435
2436         PINFO("ISR: Buffer count: %d.(T:%d H:%d)\n",
2437               me_circ_buf_values(&instance->circ_buf), instance->circ_buf.tail,
2438               instance->circ_buf.head);
2439         PINFO("ISR: Stop count: %d.\n", instance->stop_count);
2440         PINFO("ISR: Stop data count: %d.\n", instance->stop_data_count);
2441         PINFO("ISR: Data count: %d.\n", instance->data_count);
2442
2443         //Inform user
2444         wake_up_interruptible_all(&instance->wait_queue);
2445
2446         return IRQ_HANDLED;
2447 }
2448
2449 static void me4600_ao_destructor(struct me_subdevice *subdevice)
2450 {
2451         me4600_ao_subdevice_t *instance;
2452
2453         instance = (me4600_ao_subdevice_t *) subdevice;
2454
2455         PDEBUG("executed. idx=%d\n", instance->ao_idx);
2456
2457         instance->ao_control_task_flag = 0;
2458
2459         // Reset subdevice to asure clean exit.
2460         me4600_ao_io_reset_subdevice(subdevice, NULL,
2461                                      ME_IO_RESET_SUBDEVICE_NO_FLAGS);
2462
2463         // Remove any tasks from work queue. This is paranoic because it was done allready in reset().
2464         if (!cancel_delayed_work(&instance->ao_control_task)) { //Wait 2 ticks to be sure that control task is removed from queue.
2465                 set_current_state(TASK_INTERRUPTIBLE);
2466                 schedule_timeout(2);
2467         }
2468
2469         if (instance->fifo) {
2470                 if (instance->irq) {
2471                         free_irq(instance->irq, instance);
2472                         instance->irq = 0;
2473                 }
2474
2475                 if (instance->circ_buf.buf) {
2476                         free_pages((unsigned long)instance->circ_buf.buf,
2477                                    ME4600_AO_CIRC_BUF_SIZE_ORDER);
2478                 }
2479                 instance->circ_buf.buf = NULL;
2480         }
2481
2482         me_subdevice_deinit(&instance->base);
2483         kfree(instance);
2484 }
2485
2486 me4600_ao_subdevice_t *me4600_ao_constructor(uint32_t reg_base,
2487                                              spinlock_t *preload_reg_lock,
2488                                              uint32_t *preload_flags,
2489                                              int ao_idx,
2490                                              int fifo,
2491                                              int irq,
2492                                              struct workqueue_struct *me4600_wq)
2493 {
2494         me4600_ao_subdevice_t *subdevice;
2495         int err;
2496
2497         PDEBUG("executed. idx=%d\n", ao_idx);
2498
2499         // Allocate memory for subdevice instance.
2500         subdevice = kmalloc(sizeof(me4600_ao_subdevice_t), GFP_KERNEL);
2501
2502         if (!subdevice) {
2503                 PERROR("Cannot get memory for subdevice instance.\n");
2504                 return NULL;
2505         }
2506
2507         memset(subdevice, 0, sizeof(me4600_ao_subdevice_t));
2508
2509         // Initialize subdevice base class.
2510         err = me_subdevice_init(&subdevice->base);
2511
2512         if (err) {
2513                 PERROR("Cannot initialize subdevice base class instance.\n");
2514                 kfree(subdevice);
2515                 return NULL;
2516         }
2517         // Initialize spin locks.
2518         spin_lock_init(&subdevice->subdevice_lock);
2519
2520         subdevice->preload_reg_lock = preload_reg_lock;
2521         subdevice->preload_flags = preload_flags;
2522
2523         // Store analog output index.
2524         subdevice->ao_idx = ao_idx;
2525
2526         // Store if analog output has fifo.
2527         subdevice->fifo = (ao_idx < fifo) ? 1 : 0;
2528
2529         if (subdevice->fifo) {  // Allocate and initialize circular buffer.
2530                 subdevice->circ_buf.mask = ME4600_AO_CIRC_BUF_COUNT - 1;
2531
2532                 subdevice->circ_buf.buf =
2533                     (void *)__get_free_pages(GFP_KERNEL,
2534                                              ME4600_AO_CIRC_BUF_SIZE_ORDER);
2535                 PDEBUG("circ_buf = %p size=%ld\n", subdevice->circ_buf.buf,
2536                        ME4600_AO_CIRC_BUF_SIZE);
2537
2538                 if (!subdevice->circ_buf.buf) {
2539                         PERROR
2540                             ("Cannot initialize subdevice base class instance.\n");
2541                         kfree(subdevice);
2542                         return NULL;
2543                 }
2544
2545                 memset(subdevice->circ_buf.buf, 0, ME4600_AO_CIRC_BUF_SIZE);
2546         } else {                // No FIFO.
2547                 subdevice->circ_buf.mask = 0;
2548                 subdevice->circ_buf.buf = NULL;
2549         }
2550
2551         subdevice->circ_buf.head = 0;
2552         subdevice->circ_buf.tail = 0;
2553
2554         subdevice->status = ao_status_none;
2555         subdevice->ao_control_task_flag = 0;
2556         subdevice->timeout.delay = 0;
2557         subdevice->timeout.start_time = jiffies;
2558
2559         // Initialize wait queue.
2560         init_waitqueue_head(&subdevice->wait_queue);
2561
2562         // Initialize single value to 0V.
2563         subdevice->single_value = 0x8000;
2564         subdevice->single_value_in_fifo = 0x8000;
2565
2566         // Register interrupt service routine.
2567         if (subdevice->fifo) {
2568                 subdevice->irq = irq;
2569                 if (request_irq(subdevice->irq, me4600_ao_isr,
2570                                 IRQF_DISABLED | IRQF_SHARED,
2571                                 ME4600_NAME, subdevice)) {
2572                         PERROR("Cannot get interrupt line.\n");
2573                         PDEBUG("free circ_buf = %p size=%d",
2574                                subdevice->circ_buf.buf,
2575                                PAGE_SHIFT << ME4600_AO_CIRC_BUF_SIZE_ORDER);
2576                         free_pages((unsigned long)subdevice->circ_buf.buf,
2577                                    ME4600_AO_CIRC_BUF_SIZE_ORDER);
2578                         me_subdevice_deinit((me_subdevice_t *) subdevice);
2579                         kfree(subdevice);
2580                         return NULL;
2581                 }
2582                 PINFO("Registered irq=%d.\n", subdevice->irq);
2583         } else {
2584                 subdevice->irq = 0;
2585         }
2586
2587         // Initialize registers.
2588         subdevice->irq_status_reg = reg_base + ME4600_IRQ_STATUS_REG;
2589         subdevice->preload_reg = reg_base + ME4600_AO_SYNC_REG;
2590         if (ao_idx == 0) {
2591                 subdevice->ctrl_reg = reg_base + ME4600_AO_00_CTRL_REG;
2592                 subdevice->status_reg = reg_base + ME4600_AO_00_STATUS_REG;
2593                 subdevice->fifo_reg = reg_base + ME4600_AO_00_FIFO_REG;
2594                 subdevice->single_reg = reg_base + ME4600_AO_00_SINGLE_REG;
2595                 subdevice->timer_reg = reg_base + ME4600_AO_00_TIMER_REG;
2596                 subdevice->reg_base = reg_base;
2597                 subdevice->bitpattern = 0;
2598         } else if (ao_idx == 1) {
2599                 subdevice->ctrl_reg = reg_base + ME4600_AO_01_CTRL_REG;
2600                 subdevice->status_reg = reg_base + ME4600_AO_01_STATUS_REG;
2601                 subdevice->fifo_reg = reg_base + ME4600_AO_01_FIFO_REG;
2602                 subdevice->single_reg = reg_base + ME4600_AO_01_SINGLE_REG;
2603                 subdevice->timer_reg = reg_base + ME4600_AO_01_TIMER_REG;
2604                 subdevice->reg_base = reg_base;
2605                 subdevice->bitpattern = 0;
2606         } else if (ao_idx == 2) {
2607                 subdevice->ctrl_reg = reg_base + ME4600_AO_02_CTRL_REG;
2608                 subdevice->status_reg = reg_base + ME4600_AO_02_STATUS_REG;
2609                 subdevice->fifo_reg = reg_base + ME4600_AO_02_FIFO_REG;
2610                 subdevice->single_reg = reg_base + ME4600_AO_02_SINGLE_REG;
2611                 subdevice->timer_reg = reg_base + ME4600_AO_02_TIMER_REG;
2612                 subdevice->reg_base = reg_base;
2613                 subdevice->bitpattern = 0;
2614         } else if (ao_idx == 3) {
2615                 subdevice->ctrl_reg = reg_base + ME4600_AO_03_CTRL_REG;
2616                 subdevice->status_reg = reg_base + ME4600_AO_03_STATUS_REG;
2617                 subdevice->fifo_reg = reg_base + ME4600_AO_03_FIFO_REG;
2618                 subdevice->single_reg = reg_base + ME4600_AO_03_SINGLE_REG;
2619                 subdevice->timer_reg = reg_base + ME4600_AO_03_TIMER_REG;
2620                 subdevice->reg_base = reg_base;
2621                 subdevice->bitpattern = 1;
2622         } else {
2623                 PERROR_CRITICAL("WRONG SUBDEVICE idx=%d!", ao_idx);
2624                 me_subdevice_deinit((me_subdevice_t *) subdevice);
2625                 if (subdevice->fifo) {
2626                         free_pages((unsigned long)subdevice->circ_buf.buf,
2627                                    ME4600_AO_CIRC_BUF_SIZE_ORDER);
2628                 }
2629                 subdevice->circ_buf.buf = NULL;
2630                 kfree(subdevice);
2631                 return NULL;
2632         }
2633
2634         // Override base class methods.
2635         subdevice->base.me_subdevice_destructor = me4600_ao_destructor;
2636         subdevice->base.me_subdevice_io_reset_subdevice =
2637             me4600_ao_io_reset_subdevice;
2638         subdevice->base.me_subdevice_io_single_config =
2639             me4600_ao_io_single_config;
2640         subdevice->base.me_subdevice_io_single_read = me4600_ao_io_single_read;
2641         subdevice->base.me_subdevice_io_single_write =
2642             me4600_ao_io_single_write;
2643         subdevice->base.me_subdevice_io_stream_config =
2644             me4600_ao_io_stream_config;
2645         subdevice->base.me_subdevice_io_stream_new_values =
2646             me4600_ao_io_stream_new_values;
2647         subdevice->base.me_subdevice_io_stream_write =
2648             me4600_ao_io_stream_write;
2649         subdevice->base.me_subdevice_io_stream_start =
2650             me4600_ao_io_stream_start;
2651         subdevice->base.me_subdevice_io_stream_status =
2652             me4600_ao_io_stream_status;
2653         subdevice->base.me_subdevice_io_stream_stop = me4600_ao_io_stream_stop;
2654         subdevice->base.me_subdevice_query_number_channels =
2655             me4600_ao_query_number_channels;
2656         subdevice->base.me_subdevice_query_subdevice_type =
2657             me4600_ao_query_subdevice_type;
2658         subdevice->base.me_subdevice_query_subdevice_caps =
2659             me4600_ao_query_subdevice_caps;
2660         subdevice->base.me_subdevice_query_subdevice_caps_args =
2661             me4600_ao_query_subdevice_caps_args;
2662         subdevice->base.me_subdevice_query_range_by_min_max =
2663             me4600_ao_query_range_by_min_max;
2664         subdevice->base.me_subdevice_query_number_ranges =
2665             me4600_ao_query_number_ranges;
2666         subdevice->base.me_subdevice_query_range_info =
2667             me4600_ao_query_range_info;
2668         subdevice->base.me_subdevice_query_timer = me4600_ao_query_timer;
2669
2670         // Prepare work queue
2671         subdevice->me4600_workqueue = me4600_wq;
2672
2673 /* workqueue API changed in kernel 2.6.20 */
2674         INIT_DELAYED_WORK(&subdevice->ao_control_task,
2675                           me4600_ao_work_control_task);
2676
2677         if (subdevice->fifo) {  // Set speed for single operations.
2678                 outl(ME4600_AO_MIN_CHAN_TICKS - 1, subdevice->timer_reg);
2679                 subdevice->hardware_stop_delay = HZ / 10;       //100ms
2680         }
2681
2682         return subdevice;
2683 }
2684
2685 /** @brief Stop presentation. Preserve FIFOs.
2686 *
2687 * @param instance The subdevice instance (pointer).
2688 */
2689 inline int ao_stop_immediately(me4600_ao_subdevice_t *instance)
2690 {
2691         unsigned long cpu_flags;
2692         uint32_t ctrl;
2693         int timeout;
2694         int i;
2695
2696         timeout =
2697             (instance->hardware_stop_delay >
2698              (HZ / 10)) ? instance->hardware_stop_delay : HZ / 10;
2699         for (i = 0; i <= timeout; i++) {
2700                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2701                 // Stop all actions. No conditions! Block interrupts. Leave FIFO untouched!
2702                 ctrl = inl(instance->ctrl_reg);
2703                 ctrl |=
2704                     ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
2705                     | ME4600_AO_CTRL_BIT_RESET_IRQ;
2706                 ctrl &=
2707                     ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
2708                       ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
2709                 outl(ctrl, instance->ctrl_reg);
2710                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2711                            instance->reg_base,
2712                            instance->ctrl_reg - instance->reg_base, ctrl);
2713                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
2714
2715                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {  // Exit.
2716                         break;
2717                 }
2718                 //Still working!
2719                 set_current_state(TASK_INTERRUPTIBLE);
2720                 schedule_timeout(1);
2721         }
2722
2723         if (i > timeout) {
2724                 PERROR_CRITICAL("FSM IS BUSY!\n");
2725                 return ME_ERRNO_INTERNAL;
2726         }
2727         return ME_ERRNO_SUCCESS;
2728 }
2729
2730 /** @brief Copy data from circular buffer to fifo (fast) in wraparound.
2731 * @note This is time critical function. Checking is done at begining and end only.
2732 * @note The is not reasonable way to check how many walues was in FIFO at begining. The count must be managed externaly.
2733 *
2734 * @param instance The subdevice instance (pointer).
2735 * @param count Maximum number of copied data.
2736 * @param start_pos Position of the firs value in buffer.
2737 *
2738 * @return On success: Number of copied data.
2739 * @return On error/success: 0.  No datas were copied => no data in buffer.
2740 * @return On error: -ME_ERRNO_FIFO_BUFFER_OVERFLOW.
2741 */
2742 inline int ao_write_data_wraparound(me4600_ao_subdevice_t *instance, int count,
2743                                     int start_pos)
2744 {                               /// @note This is time critical function!
2745         uint32_t status;
2746         uint32_t value;
2747         int pos =
2748             (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask;
2749         int local_count = count;
2750         int i = 1;
2751
2752         if (count <= 0) {       //Wrong count!
2753                 return 0;
2754         }
2755
2756         while (i < local_count) {
2757                 //Get value from buffer
2758                 value = *(instance->circ_buf.buf + pos);
2759                 //Prepare it
2760                 if (instance->ao_idx & 0x1) {
2761                         value <<= 16;
2762                 }
2763                 //Put value to FIFO
2764                 outl(value, instance->fifo_reg);
2765                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2766
2767                 pos++;
2768                 pos &= instance->circ_buf.mask;
2769                 if (pos == instance->circ_buf.head) {
2770                         pos = instance->circ_buf.tail;
2771                 }
2772                 i++;
2773         }
2774
2775         status = inl(instance->status_reg);
2776         if (!(status & ME4600_AO_STATUS_BIT_FF)) {      //FIFO is full before all datas were copied!
2777                 PERROR("FIFO was full before all datas were copied! idx=%d\n",
2778                        instance->ao_idx);
2779                 return -ME_ERRNO_FIFO_BUFFER_OVERFLOW;
2780         } else {                //Add last value
2781                 value = *(instance->circ_buf.buf + pos);
2782                 if (instance->ao_idx & 0x1) {
2783                         value <<= 16;
2784                 }
2785                 //Put value to FIFO
2786                 outl(value, instance->fifo_reg);
2787                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2788         }
2789
2790         PINFO("WRAPAROUND LOADED %d values. idx=%d\n", local_count,
2791               instance->ao_idx);
2792         return local_count;
2793 }
2794
2795 /** @brief Copy data from software buffer to fifo (fast).
2796 * @note This is time critical function. Checking is done at begining and end only.
2797 * @note The is not reasonable way to check how many walues was in FIFO at begining. The count must be managed externaly.
2798 *
2799 * @param instance The subdevice instance (pointer).
2800 * @param count Maximum number of copied data.
2801 * @param start_pos Position of the firs value in buffer.
2802 *
2803 * @return On success: Number of copied data.
2804 * @return On error/success: 0.  No datas were copied => no data in buffer.
2805 * @return On error: -ME_ERRNO_FIFO_BUFFER_OVERFLOW.
2806 */
2807 inline int ao_write_data(me4600_ao_subdevice_t *instance, int count,
2808                          int start_pos)
2809 {                               /// @note This is time critical function!
2810         uint32_t status;
2811         uint32_t value;
2812         int pos =
2813             (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask;
2814         int local_count = count;
2815         int max_count;
2816         int i = 1;
2817
2818         if (count <= 0) {       //Wrong count!
2819                 return 0;
2820         }
2821
2822         max_count = me_circ_buf_values(&instance->circ_buf) - start_pos;
2823         if (max_count <= 0) {   //No data to copy!
2824                 return 0;
2825         }
2826
2827         if (max_count < count) {
2828                 local_count = max_count;
2829         }
2830
2831         while (i < local_count) {
2832                 //Get value from buffer
2833                 value = *(instance->circ_buf.buf + pos);
2834                 //Prepare it
2835                 if (instance->ao_idx & 0x1) {
2836                         value <<= 16;
2837                 }
2838                 //Put value to FIFO
2839                 outl(value, instance->fifo_reg);
2840                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2841
2842                 pos++;
2843                 pos &= instance->circ_buf.mask;
2844                 i++;
2845         }
2846
2847         status = inl(instance->status_reg);
2848         if (!(status & ME4600_AO_STATUS_BIT_FF)) {      //FIFO is full before all datas were copied!
2849                 PERROR("FIFO was full before all datas were copied! idx=%d\n",
2850                        instance->ao_idx);
2851                 return -ME_ERRNO_FIFO_BUFFER_OVERFLOW;
2852         } else {                //Add last value
2853                 value = *(instance->circ_buf.buf + pos);
2854                 if (instance->ao_idx & 0x1) {
2855                         value <<= 16;
2856                 }
2857                 //Put value to FIFO
2858                 outl(value, instance->fifo_reg);
2859                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2860         }
2861
2862         PINFO("FAST LOADED %d values. idx=%d\n", local_count, instance->ao_idx);
2863         return local_count;
2864 }
2865
2866 /** @brief Copy data from software buffer to fifo (slow).
2867 * @note This is slow function that copy all data from buffer to FIFO with full control.
2868 *
2869 * @param instance The subdevice instance (pointer).
2870 * @param count Maximum number of copied data.
2871 * @param start_pos Position of the firs value in buffer.
2872 *
2873 * @return On success: Number of copied values.
2874 * @return On error/success: 0.  FIFO was full at begining.
2875 * @return On error: -ME_ERRNO_RING_BUFFER_UNDEFFLOW.
2876 */
2877 inline int ao_write_data_pooling(me4600_ao_subdevice_t *instance, int count,
2878                                  int start_pos)
2879 {                               /// @note This is slow function!
2880         uint32_t status;
2881         uint32_t value;
2882         int pos =
2883             (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask;
2884         int local_count = count;
2885         int i;
2886         int max_count;
2887
2888         if (count <= 0) {       //Wrong count!
2889                 PERROR("SLOW LOADED: Wrong count! idx=%d\n", instance->ao_idx);
2890                 return 0;
2891         }
2892
2893         max_count = me_circ_buf_values(&instance->circ_buf) - start_pos;
2894         if (max_count <= 0) {   //No data to copy!
2895                 PERROR("SLOW LOADED: No data to copy! idx=%d\n",
2896                        instance->ao_idx);
2897                 return 0;
2898         }
2899
2900         if (max_count < count) {
2901                 local_count = max_count;
2902         }
2903
2904         for (i = 0; i < local_count; i++) {
2905                 status = inl(instance->status_reg);
2906                 if (!(status & ME4600_AO_STATUS_BIT_FF)) {      //FIFO is full!
2907                         return i;
2908                 }
2909                 //Get value from buffer
2910                 value = *(instance->circ_buf.buf + pos);
2911                 //Prepare it
2912                 if (instance->ao_idx & 0x1) {
2913                         value <<= 16;
2914                 }
2915                 //Put value to FIFO
2916                 outl(value, instance->fifo_reg);
2917                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2918
2919                 pos++;
2920                 pos &= instance->circ_buf.mask;
2921         }
2922
2923         PINFO("SLOW LOADED %d values. idx=%d\n", local_count, instance->ao_idx);
2924         return local_count;
2925 }
2926
2927 /** @brief Copy data from user space to circular buffer.
2928 * @param instance The subdevice instance (pointer).
2929 * @param count Number of datas in user space.
2930 * @param user_values Buffer's pointer.
2931 *
2932 * @return On success: Number of copied values.
2933 * @return On error: -ME_ERRNO_INTERNAL.
2934 */
2935 inline int ao_get_data_from_user(me4600_ao_subdevice_t *instance, int count,
2936                                  int *user_values)
2937 {
2938         int i, err;
2939         int empty_space;
2940         int copied;
2941         int value;
2942
2943         empty_space = me_circ_buf_space(&instance->circ_buf);
2944         //We have only this space free.
2945         copied = (count < empty_space) ? count : empty_space;
2946         for (i = 0; i < copied; i++) {  //Copy from user to buffer
2947                 if ((err = get_user(value, (int *)(user_values + i)))) {
2948                         PERROR
2949                             ("BUFFER LOADED: get_user(0x%p) return an error: %d. idx=%d\n",
2950                              user_values + i, err, instance->ao_idx);
2951                         return -ME_ERRNO_INTERNAL;
2952                 }
2953                 /// @note The analog output in me4600 series has size of 16 bits.
2954                 *(instance->circ_buf.buf + instance->circ_buf.head) =
2955                     (uint16_t) value;
2956                 instance->circ_buf.head++;
2957                 instance->circ_buf.head &= instance->circ_buf.mask;
2958         }
2959
2960         PINFO("BUFFER LOADED %d values. idx=%d\n", copied, instance->ao_idx);
2961         return copied;
2962 }
2963
2964 /** @brief Checking actual hardware and logical state.
2965 * @param instance The subdevice instance (pointer).
2966 */
2967 static void me4600_ao_work_control_task(struct work_struct *work)
2968 {
2969         me4600_ao_subdevice_t *instance;
2970         unsigned long cpu_flags = 0;
2971         uint32_t status;
2972         uint32_t ctrl;
2973         uint32_t synch;
2974         int reschedule = 0;
2975         int signaling = 0;
2976
2977         instance =
2978             container_of((void *)work, me4600_ao_subdevice_t, ao_control_task);
2979         PINFO("<%s: %ld> executed. idx=%d\n", __func__, jiffies,
2980               instance->ao_idx);
2981
2982         status = inl(instance->status_reg);
2983         PDEBUG_REG("status_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
2984                    instance->status_reg - instance->reg_base, status);
2985
2986         switch (instance->status) {     // Checking actual mode.
2987
2988                 // Not configured for work.
2989         case ao_status_none:
2990                 break;
2991
2992                 //This are stable modes. No need to do anything. (?)
2993         case ao_status_single_configured:
2994         case ao_status_stream_configured:
2995         case ao_status_stream_fifo_error:
2996         case ao_status_stream_buffer_error:
2997         case ao_status_stream_error:
2998                 PERROR("Shouldn't be running!.\n");
2999                 break;
3000
3001         case ao_status_stream_end:
3002                 if (!instance->fifo) {
3003                         PERROR_CRITICAL
3004                             ("Streaming on single device! This feature is not implemented in this version!\n");
3005                         instance->status = ao_status_stream_error;
3006                         // Signal the end.
3007                         signaling = 1;
3008                         break;
3009                 }
3010         case ao_status_single_end:
3011                 if (status & ME4600_AO_STATUS_BIT_FSM) {        // State machine is working but the status is set to end. Force stop.
3012
3013                         // Wait for stop.
3014                         reschedule = 1;
3015                 }
3016
3017                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3018                 // Stop all actions. No conditions! Block interrupts and trigger. Leave FIFO untouched!
3019                 ctrl = inl(instance->ctrl_reg);
3020                 ctrl |=
3021                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_STOP
3022                     | ME4600_AO_CTRL_BIT_RESET_IRQ;
3023                 ctrl &=
3024                     ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
3025                       ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
3026                 ctrl &=
3027                     ~(ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
3028                       ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH);
3029                 outl(ctrl, instance->ctrl_reg);
3030                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
3031                            instance->reg_base,
3032                            instance->ctrl_reg - instance->reg_base, ctrl);
3033                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3034                 break;
3035
3036                 // Single modes
3037         case ao_status_single_run_wait:
3038         case ao_status_single_run:
3039         case ao_status_single_end_wait:
3040
3041                 if (!(status & ME4600_AO_STATUS_BIT_FSM)) {     // State machine is not working.
3042                         if (((instance->fifo)
3043                              && (!(status & ME4600_AO_STATUS_BIT_EF)))
3044                             || (!(instance->fifo))) {   // Single is in end state.
3045                                 PDEBUG("Single call has been complited.\n");
3046
3047                                 // Set correct value for single_read();
3048                                 instance->single_value =
3049                                     instance->single_value_in_fifo;
3050
3051                                 // Set status as 'ao_status_single_end'
3052                                 instance->status = ao_status_single_end;
3053
3054                                 // Signal the end.
3055                                 signaling = 1;
3056                                 // Wait for stop ISM.
3057                                 reschedule = 1;
3058
3059                                 break;
3060                         }
3061                 }
3062                 // Check timeout.
3063                 if ((instance->timeout.delay) && ((jiffies - instance->timeout.start_time) >= instance->timeout.delay)) {       // Timeout
3064                         PDEBUG("Timeout reached.\n");
3065                         // Stop all actions. No conditions! Block interrupts and trigger. Leave FIFO untouched!
3066                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3067                         ctrl = inl(instance->ctrl_reg);
3068                         ctrl |=
3069                             ME4600_AO_CTRL_BIT_STOP |
3070                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP |
3071                             ME4600_AO_CTRL_BIT_RESET_IRQ;
3072                         ctrl &=
3073                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
3074                               ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
3075                         /// Fix for timeout error.
3076                         ctrl &=
3077                             ~(ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
3078                               ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH);
3079                         if (instance->fifo) {   //Disabling FIFO
3080                                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_FIFO;
3081                         }
3082                         outl(ctrl, instance->ctrl_reg);
3083                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
3084                                    instance->reg_base,
3085                                    instance->ctrl_reg - instance->reg_base,
3086                                    ctrl);
3087                         spin_unlock_irqrestore(&instance->subdevice_lock,
3088                                                cpu_flags);
3089
3090                         spin_lock(instance->preload_reg_lock);
3091                         //Remove from synchronous start. Block triggering from this output.
3092                         synch = inl(instance->preload_reg);
3093                         synch &=
3094                             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) <<
3095                               instance->ao_idx);
3096                         if (!(instance->fifo)) {        // No FIFO - set to single safe mode
3097                                 synch |=
3098                                     ME4600_AO_SYNC_HOLD << instance->ao_idx;
3099                         }
3100                         outl(synch, instance->preload_reg);
3101                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
3102                                    instance->reg_base,
3103                                    instance->preload_reg - instance->reg_base,
3104                                    synch);
3105                         spin_unlock(instance->preload_reg_lock);
3106
3107                         if (!(instance->fifo)) {        // No FIFO
3108                                 // Restore old settings.
3109                                 PDEBUG("Write old value back to register.\n");
3110                                 outl(instance->single_value,
3111                                      instance->single_reg);
3112                                 PDEBUG_REG
3113                                     ("single_reg outl(0x%lX+0x%lX)=0x%x\n",
3114                                      instance->reg_base,
3115                                      instance->single_reg - instance->reg_base,
3116                                      instance->single_value);
3117                         }
3118                         // Set correct value for single_read();
3119                         instance->single_value_in_fifo = instance->single_value;
3120
3121                         instance->status = ao_status_single_end;
3122
3123                         // Signal the end.
3124                         signaling = 1;
3125                 }
3126                 // Wait for stop.
3127                 reschedule = 1;
3128                 break;
3129
3130                 // Stream modes
3131         case ao_status_stream_run_wait:
3132                 if (!instance->fifo) {
3133                         PERROR_CRITICAL
3134                             ("Streaming on single device! This feature is not implemented in this version!\n");
3135                         instance->status = ao_status_stream_error;
3136                         // Signal the end.
3137                         signaling = 1;
3138                         break;
3139                 }
3140
3141                 if (status & ME4600_AO_STATUS_BIT_FSM) {        // State machine is working. Waiting for start finish.
3142                         instance->status = ao_status_stream_run;
3143
3144                         // Signal end of this step
3145                         signaling = 1;
3146                 } else {        // State machine is not working.
3147                         if (!(status & ME4600_AO_STATUS_BIT_EF)) {      // FIFO is empty. Procedure has started and finish already!
3148                                 instance->status = ao_status_stream_end;
3149
3150                                 // Signal the end.
3151                                 signaling = 1;
3152                                 // Wait for stop.
3153                                 reschedule = 1;
3154                                 break;
3155                         }
3156                 }
3157
3158                 // Check timeout.
3159                 if ((instance->timeout.delay) && ((jiffies - instance->timeout.start_time) >= instance->timeout.delay)) {       // Timeout
3160                         PDEBUG("Timeout reached.\n");
3161                         // Stop all actions. No conditions! Block interrupts. Leave FIFO untouched!
3162                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3163                         ctrl = inl(instance->ctrl_reg);
3164                         ctrl |=
3165                             ME4600_AO_CTRL_BIT_STOP |
3166                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP |
3167                             ME4600_AO_CTRL_BIT_RESET_IRQ;
3168                         ctrl &=
3169                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
3170                               ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
3171                         outl(ctrl, instance->ctrl_reg);
3172                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
3173                                    instance->reg_base,
3174                                    instance->ctrl_reg - instance->reg_base,
3175                                    ctrl);
3176                         spin_unlock_irqrestore(&instance->subdevice_lock,
3177                                                cpu_flags);
3178                         spin_lock(instance->preload_reg_lock);
3179                         //Remove from synchronous start. Block triggering from this output.
3180                         synch = inl(instance->preload_reg);
3181                         synch &=
3182                             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) <<
3183                               instance->ao_idx);
3184                         outl(synch, instance->preload_reg);
3185                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
3186                                    instance->reg_base,
3187                                    instance->preload_reg - instance->reg_base,
3188                                    synch);
3189                         spin_unlock(instance->preload_reg_lock);
3190
3191                         instance->status = ao_status_stream_end;
3192
3193                         // Signal the end.
3194                         signaling = 1;
3195                 }
3196                 // Wait for stop.
3197                 reschedule = 1;
3198                 break;
3199
3200         case ao_status_stream_run:
3201                 if (!instance->fifo) {
3202                         PERROR_CRITICAL
3203                             ("Streaming on single device! This feature is not implemented in this version!\n");
3204                         instance->status = ao_status_stream_error;
3205                         // Signal the end.
3206                         signaling = 1;
3207                         break;
3208                 }
3209
3210                 if (!(status & ME4600_AO_STATUS_BIT_FSM)) {     // State machine is not working. This is an error.
3211                         // BROKEN PIPE!
3212                         if (!(status & ME4600_AO_STATUS_BIT_EF)) {      // FIFO is empty.
3213                                 if (me_circ_buf_values(&instance->circ_buf)) {  // Software buffer is not empty.
3214                                         if (instance->stop_data_count && (instance->stop_data_count <= instance->data_count)) { //Finishing work. Requed data shown.
3215                                                 PDEBUG
3216                                                     ("ISM stoped. No data in FIFO. Buffer is not empty.\n");
3217                                                 instance->status =
3218                                                     ao_status_stream_end;
3219                                         } else {
3220                                                 PERROR
3221                                                     ("Output stream has been broken. ISM stoped. No data in FIFO. Buffer is not empty.\n");
3222                                                 instance->status =
3223                                                     ao_status_stream_buffer_error;
3224                                         }
3225                                 } else {        // Software buffer is empty.
3226                                         PDEBUG
3227                                             ("ISM stoped. No data in FIFO. Buffer is empty.\n");
3228                                         instance->status = ao_status_stream_end;
3229                                 }
3230                         } else {        // There are still datas in FIFO.
3231                                 if (me_circ_buf_values(&instance->circ_buf)) {  // Software buffer is not empty.
3232                                         PERROR
3233                                             ("Output stream has been broken. ISM stoped but some data in FIFO and buffer.\n");
3234                                 } else {        // Software buffer is empty.
3235                                         PERROR
3236                                             ("Output stream has been broken. ISM stoped but some data in FIFO. Buffer is empty.\n");
3237                                 }
3238                                 instance->status = ao_status_stream_fifo_error;
3239
3240                         }
3241
3242                         // Signal the failure.
3243                         signaling = 1;
3244                         break;
3245                 }
3246                 // Wait for stop.
3247                 reschedule = 1;
3248                 break;
3249
3250         case ao_status_stream_end_wait:
3251                 if (!instance->fifo) {
3252                         PERROR_CRITICAL
3253                             ("Streaming on single device! This feature is not implemented in this version!\n");
3254                         instance->status = ao_status_stream_error;
3255                         // Signal the end.
3256                         signaling = 1;
3257                         break;
3258                 }
3259
3260                 if (!(status & ME4600_AO_STATUS_BIT_FSM)) {     // State machine is not working. Waiting for stop finish.
3261                         instance->status = ao_status_stream_end;
3262                         signaling = 1;
3263                 }
3264                 // State machine is working.
3265                 reschedule = 1;
3266                 break;
3267
3268         default:
3269                 PERROR_CRITICAL("Status is in wrong state (%d)!\n",
3270                                 instance->status);
3271                 instance->status = ao_status_stream_error;
3272                 // Signal the end.
3273                 signaling = 1;
3274                 break;
3275
3276         }
3277
3278         if (signaling) {        //Signal it.
3279                 wake_up_interruptible_all(&instance->wait_queue);
3280         }
3281
3282         if (instance->ao_control_task_flag && reschedule) {     // Reschedule task
3283                 queue_delayed_work(instance->me4600_workqueue,
3284                                    &instance->ao_control_task, 1);
3285         } else {
3286                 PINFO("<%s> Ending control task.\n", __func__);
3287         }
3288
3289 }
3290 #else
3291 /// @note SPECIAL BUILD FOR BOSCH
3292 /// @author Guenter Gebhardt
3293 static int me4600_ao_io_reset_subdevice(me_subdevice_t *subdevice,
3294                                         struct file *filep, int flags)
3295 {
3296         me4600_ao_subdevice_t *instance;
3297         int err = ME_ERRNO_SUCCESS;
3298         uint32_t tmp;
3299         unsigned long status;
3300
3301         PDEBUG("executed.\n");
3302
3303         instance = (me4600_ao_subdevice_t *) subdevice;
3304
3305         ME_SUBDEVICE_ENTER spin_lock_irqsave(&instance->subdevice_lock, status);
3306         spin_lock(instance->preload_reg_lock);
3307         tmp = inl(instance->preload_reg);
3308         tmp &= ~(0x10001 << instance->ao_idx);
3309         outl(tmp, instance->preload_reg);
3310         *instance->preload_flags &= ~(0x1 << instance->ao_idx);
3311         spin_unlock(instance->preload_reg_lock);
3312
3313         tmp = inl(instance->ctrl_reg);
3314         tmp |= ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3315         outl(tmp, instance->ctrl_reg);
3316
3317         while (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ;
3318
3319         outl(ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP,
3320              instance->ctrl_reg);
3321
3322         outl(0x8000, instance->single_reg);
3323
3324         instance->single_value = 0x8000;
3325         instance->circ_buf.head = 0;
3326         instance->circ_buf.tail = 0;
3327
3328         spin_unlock_irqrestore(&instance->subdevice_lock, status);
3329
3330         ME_SUBDEVICE_EXIT;
3331
3332         return err;
3333 }
3334
3335 static int me4600_ao_io_single_config(me_subdevice_t *subdevice,
3336                                       struct file *filep,
3337                                       int channel,
3338                                       int single_config,
3339                                       int ref,
3340                                       int trig_chan,
3341                                       int trig_type, int trig_edge, int flags)
3342 {
3343         me4600_ao_subdevice_t *instance;
3344         int err = ME_ERRNO_SUCCESS;
3345         uint32_t tmp;
3346         unsigned long cpu_flags;
3347
3348         PDEBUG("executed.\n");
3349
3350         instance = (me4600_ao_subdevice_t *) subdevice;
3351
3352         ME_SUBDEVICE_ENTER
3353             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3354
3355         if (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) {
3356                 PERROR("Subdevice is busy.\n");
3357                 err = ME_ERRNO_SUBDEVICE_BUSY;
3358                 goto ERROR;
3359         }
3360
3361         if (channel == 0) {
3362                 if (single_config == 0) {
3363                         if (ref == ME_REF_AO_GROUND) {
3364                                 if (trig_chan == ME_TRIG_CHAN_DEFAULT) {
3365                                         if (trig_type == ME_TRIG_TYPE_SW) {
3366                                                 tmp = inl(instance->ctrl_reg);
3367                                                 tmp |=
3368                                                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3369                                                 outl(tmp, instance->ctrl_reg);
3370                                                 tmp =
3371                                                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3372                                                 outl(tmp, instance->ctrl_reg);
3373
3374                                                 spin_lock(instance->
3375                                                           preload_reg_lock);
3376                                                 tmp =
3377                                                     inl(instance->preload_reg);
3378                                                 tmp &=
3379                                                     ~(0x10001 << instance->
3380                                                       ao_idx);
3381                                                 outl(tmp,
3382                                                      instance->preload_reg);
3383                                                 *instance->preload_flags &=
3384                                                     ~(0x1 << instance->ao_idx);
3385                                                 spin_unlock(instance->
3386                                                             preload_reg_lock);
3387                                         } else if (trig_type ==
3388                                                    ME_TRIG_TYPE_EXT_DIGITAL) {
3389                                                 if (trig_edge ==
3390                                                     ME_TRIG_EDGE_RISING) {
3391                                                         tmp =
3392                                                             inl(instance->
3393                                                                 ctrl_reg);
3394                                                         tmp |=
3395                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3396                                                         outl(tmp,
3397                                                              instance->
3398                                                              ctrl_reg);
3399                                                         tmp =
3400                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3401                                                             |
3402                                                             ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
3403                                                         outl(tmp,
3404                                                              instance->
3405                                                              ctrl_reg);
3406                                                 } else if (trig_edge ==
3407                                                            ME_TRIG_EDGE_FALLING)
3408                                                 {
3409                                                         tmp =
3410                                                             inl(instance->
3411                                                                 ctrl_reg);
3412                                                         tmp |=
3413                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3414                                                         outl(tmp,
3415                                                              instance->
3416                                                              ctrl_reg);
3417                                                         tmp =
3418                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3419                                                             |
3420                                                             ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG
3421                                                             |
3422                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
3423                                                         outl(tmp,
3424                                                              instance->
3425                                                              ctrl_reg);
3426                                                 } else if (trig_edge ==
3427                                                            ME_TRIG_EDGE_ANY) {
3428                                                         tmp =
3429                                                             inl(instance->
3430                                                                 ctrl_reg);
3431                                                         tmp |=
3432                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3433                                                         outl(tmp,
3434                                                              instance->
3435                                                              ctrl_reg);
3436                                                         tmp =
3437                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3438                                                             |
3439                                                             ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG
3440                                                             |
3441                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE
3442                                                             |
3443                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
3444                                                         outl(tmp,
3445                                                              instance->
3446                                                              ctrl_reg);
3447                                                 } else {
3448                                                         PERROR
3449                                                             ("Invalid trigger edge.\n");
3450                                                         err =
3451                                                             ME_ERRNO_INVALID_TRIG_EDGE;
3452                                                         goto ERROR;
3453                                                 }
3454
3455                                                 spin_lock(instance->
3456                                                           preload_reg_lock);
3457
3458                                                 tmp =
3459                                                     inl(instance->preload_reg);
3460                                                 tmp &=
3461                                                     ~(0x10001 << instance->
3462                                                       ao_idx);
3463                                                 tmp |= 0x1 << instance->ao_idx;
3464                                                 outl(tmp,
3465                                                      instance->preload_reg);
3466                                                 *instance->preload_flags &=
3467                                                     ~(0x1 << instance->ao_idx);
3468                                                 spin_unlock(instance->
3469                                                             preload_reg_lock);
3470                                         } else {
3471                                                 PERROR
3472                                                     ("Invalid trigger type.\n");
3473                                                 err =
3474                                                     ME_ERRNO_INVALID_TRIG_TYPE;
3475                                                 goto ERROR;
3476                                         }
3477                                 } else if (trig_chan ==
3478                                            ME_TRIG_CHAN_SYNCHRONOUS) {
3479                                         if (trig_type == ME_TRIG_TYPE_SW) {
3480                                                 tmp = inl(instance->ctrl_reg);
3481                                                 tmp |=
3482                                                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3483                                                 outl(tmp, instance->ctrl_reg);
3484                                                 tmp =
3485                                                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3486                                                 outl(tmp, instance->ctrl_reg);
3487
3488                                                 spin_lock(instance->
3489                                                           preload_reg_lock);
3490                                                 tmp =
3491                                                     inl(instance->preload_reg);
3492                                                 tmp &=
3493                                                     ~(0x10001 << instance->
3494                                                       ao_idx);
3495                                                 tmp |= 0x1 << instance->ao_idx;
3496                                                 outl(tmp,
3497                                                      instance->preload_reg);
3498                                                 *instance->preload_flags |=
3499                                                     0x1 << instance->ao_idx;
3500                                                 spin_unlock(instance->
3501                                                             preload_reg_lock);
3502                                         } else if (trig_type ==
3503                                                    ME_TRIG_TYPE_EXT_DIGITAL) {
3504                                                 if (trig_edge ==
3505                                                     ME_TRIG_EDGE_RISING) {
3506                                                         tmp =
3507                                                             inl(instance->
3508                                                                 ctrl_reg);
3509                                                         tmp |=
3510                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3511                                                         outl(tmp,
3512                                                              instance->
3513                                                              ctrl_reg);
3514                                                         tmp =
3515                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3516                                                         outl(tmp,
3517                                                              instance->
3518                                                              ctrl_reg);
3519                                                 } else if (trig_edge ==
3520                                                            ME_TRIG_EDGE_FALLING)
3521                                                 {
3522                                                         tmp =
3523                                                             inl(instance->
3524                                                                 ctrl_reg);
3525                                                         tmp |=
3526                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3527                                                         outl(tmp,
3528                                                              instance->
3529                                                              ctrl_reg);
3530                                                         tmp =
3531                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3532                                                             |
3533                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
3534                                                         outl(tmp,
3535                                                              instance->
3536                                                              ctrl_reg);
3537                                                 } else if (trig_edge ==
3538                                                            ME_TRIG_EDGE_ANY) {
3539                                                         tmp =
3540                                                             inl(instance->
3541                                                                 ctrl_reg);
3542                                                         tmp |=
3543                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3544                                                         outl(tmp,
3545                                                              instance->
3546                                                              ctrl_reg);
3547                                                         tmp =
3548                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3549                                                             |
3550                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE
3551                                                             |
3552                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
3553                                                         outl(tmp,
3554                                                              instance->
3555                                                              ctrl_reg);
3556                                                 } else {
3557                                                         PERROR
3558                                                             ("Invalid trigger edge.\n");
3559                                                         err =
3560                                                             ME_ERRNO_INVALID_TRIG_EDGE;
3561                                                         goto ERROR;
3562                                                 }
3563
3564                                                 spin_lock(instance->
3565                                                           preload_reg_lock);
3566
3567                                                 tmp =
3568                                                     inl(instance->preload_reg);
3569                                                 tmp |=
3570                                                     0x10001 << instance->ao_idx;
3571                                                 outl(tmp,
3572                                                      instance->preload_reg);
3573                                                 *instance->preload_flags &=
3574                                                     ~(0x1 << instance->ao_idx);
3575                                                 spin_unlock(instance->
3576                                                             preload_reg_lock);
3577                                         } else {
3578                                                 PERROR
3579                                                     ("Invalid trigger type.\n");
3580                                                 err =
3581                                                     ME_ERRNO_INVALID_TRIG_TYPE;
3582                                                 goto ERROR;
3583                                         }
3584                                 } else {
3585                                         PERROR
3586                                             ("Invalid trigger channel specified.\n");
3587                                         err = ME_ERRNO_INVALID_REF;
3588                                         goto ERROR;
3589                                 }
3590                         } else {
3591                                 PERROR("Invalid analog reference specified.\n");
3592                                 err = ME_ERRNO_INVALID_REF;
3593                                 goto ERROR;
3594                         }
3595                 } else {
3596                         PERROR("Invalid single config specified.\n");
3597                         err = ME_ERRNO_INVALID_SINGLE_CONFIG;
3598                         goto ERROR;
3599                 }
3600         } else {
3601                 PERROR("Invalid channel number specified.\n");
3602                 err = ME_ERRNO_INVALID_CHANNEL;
3603                 goto ERROR;
3604         }
3605
3606 ERROR:
3607
3608         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3609
3610         ME_SUBDEVICE_EXIT;
3611
3612         return err;
3613 }
3614
3615 static int me4600_ao_io_single_read(me_subdevice_t *subdevice,
3616                                     struct file *filep,
3617                                     int channel,
3618                                     int *value, int time_out, int flags)
3619 {
3620         me4600_ao_subdevice_t *instance;
3621         int err = ME_ERRNO_SUCCESS;
3622         unsigned long tmp;
3623         unsigned long cpu_flags;
3624
3625         PDEBUG("executed.\n");
3626
3627         instance = (me4600_ao_subdevice_t *) subdevice;
3628
3629         if (channel != 0) {
3630                 PERROR("Invalid channel number specified.\n");
3631                 return ME_ERRNO_INVALID_CHANNEL;
3632         }
3633
3634         ME_SUBDEVICE_ENTER
3635             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3636         tmp = inl(instance->ctrl_reg);
3637
3638         if (tmp & 0x3) {
3639                 PERROR("Not in single mode.\n");
3640                 err = ME_ERRNO_PREVIOUS_CONFIG;
3641         } else {
3642                 *value = instance->single_value;
3643         }
3644
3645         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3646
3647         ME_SUBDEVICE_EXIT;
3648
3649         return err;
3650 }
3651
3652 static int me4600_ao_io_single_write(me_subdevice_t *subdevice,
3653                                      struct file *filep,
3654                                      int channel,
3655                                      int value, int time_out, int flags)
3656 {
3657         me4600_ao_subdevice_t *instance;
3658         int err = ME_ERRNO_SUCCESS;
3659         unsigned long mask = 0;
3660         unsigned long tmp;
3661         unsigned long cpu_flags;
3662         int i;
3663         wait_queue_head_t queue;
3664         unsigned long j;
3665         unsigned long delay = 0;
3666
3667         PDEBUG("executed.\n");
3668
3669         init_waitqueue_head(&queue);
3670
3671         instance = (me4600_ao_subdevice_t *) subdevice;
3672
3673         if (channel != 0) {
3674                 PERROR("Invalid channel number specified.\n");
3675                 return ME_ERRNO_INVALID_CHANNEL;
3676         }
3677
3678         if (time_out < 0) {
3679                 PERROR("Invalid timeout specified.\n");
3680                 return ME_ERRNO_INVALID_TIMEOUT;
3681         }
3682
3683         if (time_out) {
3684                 delay = (time_out * HZ) / 1000;
3685
3686                 if (delay == 0)
3687                         delay = 1;
3688         }
3689
3690         ME_SUBDEVICE_ENTER
3691             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3692
3693         tmp = inl(instance->ctrl_reg);
3694
3695         if (tmp & 0x3) {
3696                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3697                 PERROR("Not in single mode.\n");
3698                 err = ME_ERRNO_PREVIOUS_CONFIG;
3699                 goto ERROR;
3700         }
3701
3702         if (tmp & ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG) {
3703                 outl(value, instance->single_reg);
3704                 instance->single_value = value;
3705                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3706
3707                 if (!(flags & ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) {
3708                         j = jiffies;
3709
3710                         while (inl(instance->status_reg) &
3711                                ME4600_AO_STATUS_BIT_FSM) {
3712                                 interruptible_sleep_on_timeout(&queue, 1);
3713
3714                                 if (signal_pending(current)) {
3715                                         PERROR
3716                                             ("Wait on external trigger interrupted by signal.\n");
3717                                         err = ME_ERRNO_SIGNAL;
3718                                         goto ERROR;
3719                                 }
3720
3721                                 if (delay && ((jiffies - j) > delay)) {
3722                                         PERROR("Timeout reached.\n");
3723                                         err = ME_ERRNO_TIMEOUT;
3724                                         goto ERROR;
3725                                 }
3726                         }
3727                 }
3728         } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx))
3729                    == (0x10001 << instance->ao_idx)) {
3730                 if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {
3731                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
3732                         outl(tmp, instance->ctrl_reg);
3733                         outl(value, instance->single_reg);
3734                         instance->single_value = value;
3735                         spin_unlock_irqrestore(&instance->subdevice_lock,
3736                                                cpu_flags);
3737
3738                         if (!(flags & ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) {
3739                                 j = jiffies;
3740
3741                                 while (inl(instance->status_reg) &
3742                                        ME4600_AO_STATUS_BIT_FSM) {
3743                                         interruptible_sleep_on_timeout(&queue,
3744                                                                        1);
3745
3746                                         if (signal_pending(current)) {
3747                                                 PERROR
3748                                                     ("Wait on external trigger interrupted by signal.\n");
3749                                                 err = ME_ERRNO_SIGNAL;
3750                                                 goto ERROR;
3751                                         }
3752
3753                                         if (delay && ((jiffies - j) > delay)) {
3754                                                 PERROR("Timeout reached.\n");
3755                                                 err = ME_ERRNO_TIMEOUT;
3756                                                 goto ERROR;
3757                                         }
3758                                 }
3759                         }
3760                 } else {
3761                         outl(value, instance->single_reg);
3762                         instance->single_value = value;
3763                         spin_unlock_irqrestore(&instance->subdevice_lock,
3764                                                cpu_flags);
3765                 }
3766         } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx))
3767                    == (0x1 << instance->ao_idx)) {
3768                 outl(value, instance->single_reg);
3769                 instance->single_value = value;
3770
3771                 PDEBUG("Synchronous SW, flags = 0x%X.\n", flags);
3772
3773                 if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {
3774                         PDEBUG("Trigger synchronous SW.\n");
3775                         spin_lock(instance->preload_reg_lock);
3776                         tmp = inl(instance->preload_reg);
3777
3778                         for (i = 0; i < ME4600_AO_MAX_SUBDEVICES; i++) {
3779                                 if ((*instance->preload_flags & (0x1 << i))) {
3780                                         if ((tmp & (0x10001 << i)) ==
3781                                             (0x1 << i)) {
3782                                                 mask |= 0x1 << i;
3783                                         }
3784                                 }
3785                         }
3786
3787                         tmp &= ~(mask);
3788
3789                         outl(tmp, instance->preload_reg);
3790                         spin_unlock(instance->preload_reg_lock);
3791                 }
3792
3793                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3794         } else {
3795                 outl(value, instance->single_reg);
3796                 instance->single_value = value;
3797                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3798         }
3799
3800 ERROR:
3801
3802         ME_SUBDEVICE_EXIT;
3803
3804         return err;
3805 }
3806
3807 static int me4600_ao_io_stream_config(me_subdevice_t *subdevice,
3808                                       struct file *filep,
3809                                       meIOStreamConfig_t *config_list,
3810                                       int count,
3811                                       meIOStreamTrigger_t *trigger,
3812                                       int fifo_irq_threshold, int flags)
3813 {
3814         me4600_ao_subdevice_t *instance;
3815         int err = ME_ERRNO_SUCCESS;
3816         unsigned long ctrl;
3817         unsigned long tmp;
3818         unsigned long cpu_flags;
3819         uint64_t conv_ticks;
3820         unsigned int conv_start_ticks_low = trigger->iConvStartTicksLow;
3821         unsigned int conv_start_ticks_high = trigger->iConvStartTicksHigh;
3822
3823         PDEBUG("executed.\n");
3824
3825         instance = (me4600_ao_subdevice_t *) subdevice;
3826
3827         conv_ticks =
3828             (uint64_t) conv_start_ticks_low +
3829             ((uint64_t) conv_start_ticks_high << 32);
3830
3831         if (!instance->fifo) {
3832                 PERROR("Not a streaming ao.\n");
3833                 return ME_ERRNO_NOT_SUPPORTED;
3834         }
3835
3836         ME_SUBDEVICE_ENTER
3837             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3838
3839         if ((inl(instance->status_reg)) & ME4600_AO_STATUS_BIT_FSM) {
3840                 PERROR("Subdevice is busy.\n");
3841                 err = ME_ERRNO_SUBDEVICE_BUSY;
3842                 goto ERROR;
3843         }
3844
3845         ctrl = inl(instance->ctrl_reg);
3846         ctrl |= ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3847         outl(ctrl, instance->ctrl_reg);
3848         ctrl = ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3849         outl(ctrl, instance->ctrl_reg);
3850
3851         if (count != 1) {
3852                 PERROR("Invalid stream configuration list count specified.\n");
3853                 err = ME_ERRNO_INVALID_CONFIG_LIST_COUNT;
3854                 goto ERROR;
3855         }
3856
3857         if (config_list[0].iChannel != 0) {
3858                 PERROR("Invalid channel number specified.\n");
3859                 err = ME_ERRNO_INVALID_CHANNEL;
3860                 goto ERROR;
3861         }
3862
3863         if (config_list[0].iStreamConfig != 0) {
3864                 PERROR("Invalid stream config specified.\n");
3865                 err = ME_ERRNO_INVALID_STREAM_CONFIG;
3866                 goto ERROR;
3867         }
3868
3869         if (config_list[0].iRef != ME_REF_AO_GROUND) {
3870                 PERROR("Invalid analog reference.\n");
3871                 err = ME_ERRNO_INVALID_REF;
3872                 goto ERROR;
3873         }
3874
3875         if ((trigger->iAcqStartTicksLow != 0)
3876             || (trigger->iAcqStartTicksHigh != 0)) {
3877                 PERROR
3878                     ("Invalid acquisition start trigger argument specified.\n");
3879                 err = ME_ERRNO_INVALID_ACQ_START_ARG;
3880                 goto ERROR;
3881         }
3882
3883         switch (trigger->iAcqStartTrigType) {
3884
3885         case ME_TRIG_TYPE_SW:
3886                 break;
3887
3888         case ME_TRIG_TYPE_EXT_DIGITAL:
3889                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
3890
3891                 switch (trigger->iAcqStartTrigEdge) {
3892
3893                 case ME_TRIG_EDGE_RISING:
3894                         break;
3895
3896                 case ME_TRIG_EDGE_FALLING:
3897                         ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
3898
3899                         break;
3900
3901                 case ME_TRIG_EDGE_ANY:
3902                         ctrl |=
3903                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
3904                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
3905
3906                         break;
3907
3908                 default:
3909                         PERROR
3910                             ("Invalid acquisition start trigger edge specified.\n");
3911
3912                         err = ME_ERRNO_INVALID_ACQ_START_TRIG_EDGE;
3913
3914                         goto ERROR;
3915
3916                         break;
3917                 }
3918
3919                 break;
3920
3921         default:
3922                 PERROR("Invalid acquisition start trigger type specified.\n");
3923
3924                 err = ME_ERRNO_INVALID_ACQ_START_TRIG_TYPE;
3925
3926                 goto ERROR;
3927
3928                 break;
3929         }
3930
3931         switch (trigger->iScanStartTrigType) {
3932
3933         case ME_TRIG_TYPE_FOLLOW:
3934                 break;
3935
3936         default:
3937                 PERROR("Invalid scan start trigger type specified.\n");
3938
3939                 err = ME_ERRNO_INVALID_SCAN_START_TRIG_TYPE;
3940
3941                 goto ERROR;
3942
3943                 break;
3944         }
3945
3946         switch (trigger->iConvStartTrigType) {
3947
3948         case ME_TRIG_TYPE_TIMER:
3949                 if ((conv_ticks < ME4600_AO_MIN_CHAN_TICKS)
3950                     || (conv_ticks > ME4600_AO_MAX_CHAN_TICKS)) {
3951                         PERROR
3952                             ("Invalid conv start trigger argument specified.\n");
3953                         err = ME_ERRNO_INVALID_CONV_START_ARG;
3954                         goto ERROR;
3955                 }
3956
3957                 break;
3958
3959         default:
3960                 PERROR("Invalid conv start trigger type specified.\n");
3961
3962                 err = ME_ERRNO_INVALID_CONV_START_TRIG_TYPE;
3963
3964                 goto ERROR;
3965
3966                 break;
3967         }
3968
3969         /* Preset to hardware wraparound mode */
3970         instance->flags &= ~(ME4600_AO_FLAGS_SW_WRAP_MODE_MASK);
3971
3972         switch (trigger->iScanStopTrigType) {
3973
3974         case ME_TRIG_TYPE_NONE:
3975                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
3976                         /* Set flags to indicate usage of software mode. */
3977                         instance->flags |= ME4600_AO_FLAGS_SW_WRAP_MODE_INF;
3978                         instance->wrap_count = 0;
3979                         instance->wrap_remaining = 0;
3980                 }
3981
3982                 break;
3983
3984         case ME_TRIG_TYPE_COUNT:
3985                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
3986                         if (trigger->iScanStopCount <= 0) {
3987                                 PERROR("Invalid scan stop count specified.\n");
3988                                 err = ME_ERRNO_INVALID_SCAN_STOP_ARG;
3989                                 goto ERROR;
3990                         }
3991
3992                         /* Set flags to indicate usage of software mode. */
3993                         instance->flags |= ME4600_AO_FLAGS_SW_WRAP_MODE_FIN;
3994                         instance->wrap_count = trigger->iScanStopCount;
3995                         instance->wrap_remaining = trigger->iScanStopCount;
3996                 } else {
3997                         PERROR("Invalid scan stop trigger type specified.\n");
3998                         err = ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
3999                         goto ERROR;
4000                 }
4001
4002                 break;
4003
4004         default:
4005                 PERROR("Invalid scan stop trigger type specified.\n");
4006
4007                 err = ME_ERRNO_INVALID_SCAN_STOP_TRIG_TYPE;
4008
4009                 goto ERROR;
4010
4011                 break;
4012         }
4013
4014         switch (trigger->iAcqStopTrigType) {
4015
4016         case ME_TRIG_TYPE_NONE:
4017                 break;
4018
4019         case ME_TRIG_TYPE_COUNT:
4020                 if (trigger->iScanStopTrigType != ME_TRIG_TYPE_NONE) {
4021                         PERROR("Invalid acq stop trigger type specified.\n");
4022                         err = ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
4023                         goto ERROR;
4024                 }
4025
4026                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
4027                         if (trigger->iAcqStopCount <= 0) {
4028                                 PERROR("Invalid acq stop count specified.\n");
4029                                 err = ME_ERRNO_INVALID_ACQ_STOP_ARG;
4030                                 goto ERROR;
4031                         }
4032
4033                         /* Set flags to indicate usage of software mode. */
4034                         instance->flags |= ME4600_AO_FLAGS_SW_WRAP_MODE_FIN;
4035                         instance->wrap_count = trigger->iAcqStopCount;
4036                         instance->wrap_remaining = trigger->iAcqStopCount;
4037                 } else {
4038                         PERROR("Invalid acp stop trigger type specified.\n");
4039                         err = ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
4040                         goto ERROR;
4041                 }
4042
4043                 break;
4044
4045         default:
4046                 PERROR("Invalid acq stop trigger type specified.\n");
4047                 err = ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
4048                 goto ERROR;
4049                 break;
4050         }
4051
4052         switch (trigger->iAcqStartTrigChan) {
4053
4054         case ME_TRIG_CHAN_DEFAULT:
4055                 spin_lock(instance->preload_reg_lock);
4056                 tmp = inl(instance->preload_reg);
4057                 tmp &= ~(0x10001 << instance->ao_idx);
4058                 outl(tmp, instance->preload_reg);
4059                 spin_unlock(instance->preload_reg_lock);
4060
4061                 break;
4062
4063         case ME_TRIG_CHAN_SYNCHRONOUS:
4064                 if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_SW) {
4065                         spin_lock(instance->preload_reg_lock);
4066                         tmp = inl(instance->preload_reg);
4067                         tmp &= ~(0x10001 << instance->ao_idx);
4068                         outl(tmp, instance->preload_reg);
4069                         tmp |= 0x1 << instance->ao_idx;
4070                         outl(tmp, instance->preload_reg);
4071                         spin_unlock(instance->preload_reg_lock);
4072                 } else {
4073                         ctrl &= ~(ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
4074                         spin_lock(instance->preload_reg_lock);
4075                         tmp = inl(instance->preload_reg);
4076                         tmp &= ~(0x10001 << instance->ao_idx);
4077                         outl(tmp, instance->preload_reg);
4078                         tmp |= 0x10000 << instance->ao_idx;
4079                         outl(tmp, instance->preload_reg);
4080                         spin_unlock(instance->preload_reg_lock);
4081                 }
4082
4083                 break;
4084
4085         default:
4086                 PERROR("Invalid acq start trigger channel specified.\n");
4087                 err = ME_ERRNO_INVALID_ACQ_START_TRIG_CHAN;
4088                 goto ERROR;
4089
4090                 break;
4091         }
4092
4093         outl(conv_ticks - 2, instance->timer_reg);
4094
4095         if (flags & ME_IO_STREAM_CONFIG_BIT_PATTERN) {
4096                 if (instance->ao_idx == 3) {
4097                         ctrl |= ME4600_AO_CTRL_BIT_ENABLE_DO;
4098                 } else {
4099                         err = ME_ERRNO_INVALID_FLAGS;
4100                         goto ERROR;
4101                 }
4102         } else {
4103                 if (instance->ao_idx == 3) {
4104                         ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_DO;
4105                 }
4106         }
4107
4108         /* Set hardware mode. */
4109         if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
4110                 ctrl |= ME4600_AO_CTRL_BIT_MODE_0;
4111         } else {
4112                 ctrl |= ME4600_AO_CTRL_BIT_MODE_1;
4113         }
4114
4115         PDEBUG("Preload word = 0x%X.\n", inl(instance->preload_reg));
4116
4117         PDEBUG("Ctrl word = 0x%lX.\n", ctrl);
4118         outl(ctrl, instance->ctrl_reg); // Write the control word
4119
4120 ERROR:
4121
4122         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4123
4124         ME_SUBDEVICE_EXIT;
4125
4126         return err;
4127 }
4128
4129 static int me4600_ao_io_stream_new_values(me_subdevice_t *subdevice,
4130                                           struct file *filep,
4131                                           int time_out, int *count, int flags)
4132 {
4133         me4600_ao_subdevice_t *instance;
4134         int err = ME_ERRNO_SUCCESS;
4135         long t = 0;
4136         long j;
4137
4138         PDEBUG("executed.\n");
4139
4140         instance = (me4600_ao_subdevice_t *) subdevice;
4141
4142         if (!instance->fifo) {
4143                 PERROR("Not a streaming ao.\n");
4144                 return ME_ERRNO_NOT_SUPPORTED;
4145         }
4146
4147         if (time_out < 0) {
4148                 PERROR("Invalid time_out specified.\n");
4149                 return ME_ERRNO_INVALID_TIMEOUT;
4150         }
4151
4152         if (time_out) {
4153                 t = (time_out * HZ) / 1000;
4154
4155                 if (t == 0)
4156                         t = 1;
4157         }
4158
4159         *count = 0;
4160
4161         ME_SUBDEVICE_ENTER;
4162
4163         if (t) {
4164                 j = jiffies;
4165                 wait_event_interruptible_timeout(instance->wait_queue,
4166                                                  ((me_circ_buf_space
4167                                                    (&instance->circ_buf))
4168                                                   || !(inl(instance->status_reg)
4169                                                        &
4170                                                        ME4600_AO_STATUS_BIT_FSM)),
4171                                                  t);
4172
4173                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
4174                         PERROR("AO subdevice is not running.\n");
4175                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
4176                 } else if (signal_pending(current)) {
4177                         PERROR("Wait on values interrupted from signal.\n");
4178                         err = ME_ERRNO_SIGNAL;
4179                 } else if ((jiffies - j) >= t) {
4180                         PERROR("Wait on values timed out.\n");
4181                         err = ME_ERRNO_TIMEOUT;
4182                 } else {
4183                         *count = me_circ_buf_space(&instance->circ_buf);
4184                 }
4185         } else {
4186                 wait_event_interruptible(instance->wait_queue,
4187                                          ((me_circ_buf_space
4188                                            (&instance->circ_buf))
4189                                           || !(inl(instance->status_reg) &
4190                                                ME4600_AO_STATUS_BIT_FSM)));
4191
4192                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
4193                         PERROR("AO subdevice is not running.\n");
4194                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
4195                 } else if (signal_pending(current)) {
4196                         PERROR("Wait on values interrupted from signal.\n");
4197                         err = ME_ERRNO_SIGNAL;
4198                 } else {
4199                         *count = me_circ_buf_space(&instance->circ_buf);
4200                 }
4201         }
4202
4203         ME_SUBDEVICE_EXIT;
4204
4205         return err;
4206 }
4207
4208 static void stop_immediately(me4600_ao_subdevice_t *instance)
4209 {
4210         unsigned long cpu_flags;
4211         uint32_t tmp;
4212
4213         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4214         tmp = inl(instance->ctrl_reg);
4215         tmp |= ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
4216         outl(tmp, instance->ctrl_reg);
4217
4218         while (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ;
4219
4220         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4221 }
4222
4223 static int me4600_ao_io_stream_start(me_subdevice_t *subdevice,
4224                                      struct file *filep,
4225                                      int start_mode, int time_out, int flags)
4226 {
4227         me4600_ao_subdevice_t *instance;
4228         int err = ME_ERRNO_SUCCESS;
4229         unsigned long cpu_flags = 0;
4230         unsigned long ref;
4231         unsigned long tmp;
4232         unsigned long delay = 0;
4233         wait_queue_head_t queue;
4234
4235         PDEBUG("executed.\n");
4236
4237         instance = (me4600_ao_subdevice_t *) subdevice;
4238
4239         init_waitqueue_head(&queue);
4240
4241         if (time_out < 0) {
4242                 PERROR("Invalid timeout specified.\n");
4243                 return ME_ERRNO_INVALID_TIMEOUT;
4244         }
4245
4246         if (time_out) {
4247                 delay = (time_out * HZ) / 1000;
4248
4249                 if (delay == 0)
4250                         delay = 1;
4251         }
4252
4253         if (!instance->fifo) {
4254                 PERROR("Not a streaming ao.\n");
4255                 return ME_ERRNO_NOT_SUPPORTED;
4256         }
4257
4258         ME_SUBDEVICE_ENTER
4259             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4260
4261         tmp = inl(instance->ctrl_reg);
4262
4263         switch (tmp & (ME4600_AO_CTRL_MASK_MODE)) {
4264
4265         case 0:         // Single mode
4266                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4267                 PERROR("Subdevice is configured in single mode.\n");
4268                 err = ME_ERRNO_PREVIOUS_CONFIG;
4269                 goto ERROR;
4270
4271         case 1:         // Wraparound mode
4272                 if (tmp & ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG) {  // Normal wraparound with external trigger
4273
4274                         if ((inl(instance->status_reg) &
4275                              ME4600_AO_STATUS_BIT_FSM)) {
4276                                 spin_unlock_irqrestore(&instance->
4277                                                        subdevice_lock,
4278                                                        cpu_flags);
4279                                 PERROR("Conversion is already running.\n");
4280                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4281                                 goto ERROR;
4282                         }
4283
4284                         tmp &=
4285                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4286                               ME4600_AO_CTRL_BIT_STOP |
4287                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4288
4289                         outl(tmp, instance->ctrl_reg);
4290                         spin_unlock_irqrestore(&instance->subdevice_lock,
4291                                                cpu_flags);
4292
4293                         if (start_mode == ME_START_MODE_BLOCKING) {
4294                                 init_waitqueue_head(&queue);
4295
4296                                 if (delay) {
4297                                         ref = jiffies;
4298
4299                                         while (!
4300                                                (inl(instance->status_reg) &
4301                                                 ME4600_AO_STATUS_BIT_FSM)) {
4302                                                 interruptible_sleep_on_timeout
4303                                                     (&queue, 1);
4304
4305                                                 if (signal_pending(current)) {
4306                                                         PERROR
4307                                                             ("Wait on start of state machine interrupted.\n");
4308                                                         stop_immediately
4309                                                             (instance);
4310                                                         err = ME_ERRNO_SIGNAL;
4311                                                         goto ERROR;
4312                                                 }
4313
4314                                                 if (((jiffies - ref) >= delay)) {
4315                                                         PERROR
4316                                                             ("Timeout reached.\n");
4317                                                         stop_immediately
4318                                                             (instance);
4319                                                         err = ME_ERRNO_TIMEOUT;
4320                                                         goto ERROR;
4321                                                 }
4322                                         }
4323                                 } else {
4324                                         while (!
4325                                                (inl(instance->status_reg) &
4326                                                 ME4600_AO_STATUS_BIT_FSM)) {
4327                                                 interruptible_sleep_on_timeout
4328                                                     (&queue, 1);
4329
4330                                                 if (signal_pending(current)) {
4331                                                         PERROR
4332                                                             ("Wait on start of state machine interrupted.\n");
4333                                                         stop_immediately
4334                                                             (instance);
4335                                                         err = ME_ERRNO_SIGNAL;
4336                                                         goto ERROR;
4337                                                 }
4338                                         }
4339                                 }
4340                         } else if (start_mode == ME_START_MODE_NONBLOCKING) {
4341                         } else {
4342                                 PERROR("Invalid start mode specified.\n");
4343                                 err = ME_ERRNO_INVALID_START_MODE;
4344                                 goto ERROR;
4345                         }
4346                 } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx)) == (0x10000 << instance->ao_idx)) {     // Synchronous with external trigger
4347
4348                         if ((inl(instance->status_reg) &
4349                              ME4600_AO_STATUS_BIT_FSM)) {
4350                                 spin_unlock_irqrestore(&instance->
4351                                                        subdevice_lock,
4352                                                        cpu_flags);
4353                                 PERROR("Conversion is already running.\n");
4354                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4355                                 goto ERROR;
4356                         }
4357
4358                         if (flags & ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
4359                                 tmp |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
4360                                 tmp &=
4361                                     ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4362                                       ME4600_AO_CTRL_BIT_STOP |
4363                                       ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4364                                 outl(tmp, instance->ctrl_reg);
4365                                 spin_unlock_irqrestore(&instance->
4366                                                        subdevice_lock,
4367                                                        cpu_flags);
4368
4369                                 if (start_mode == ME_START_MODE_BLOCKING) {
4370                                         init_waitqueue_head(&queue);
4371
4372                                         if (delay) {
4373                                                 ref = jiffies;
4374
4375                                                 while (!
4376                                                        (inl
4377                                                         (instance->
4378                                                          status_reg) &
4379                                                         ME4600_AO_STATUS_BIT_FSM))
4380                                                 {
4381                                                         interruptible_sleep_on_timeout
4382                                                             (&queue, 1);
4383
4384                                                         if (signal_pending
4385                                                             (current)) {
4386                                                                 PERROR
4387                                                                     ("Wait on start of state machine interrupted.\n");
4388                                                                 stop_immediately
4389                                                                     (instance);
4390                                                                 err =
4391                                                                     ME_ERRNO_SIGNAL;
4392                                                                 goto ERROR;
4393                                                         }
4394
4395                                                         if (((jiffies - ref) >=
4396                                                              delay)) {
4397                                                                 PERROR
4398                                                                     ("Timeout reached.\n");
4399                                                                 stop_immediately
4400                                                                     (instance);
4401                                                                 err =
4402                                                                     ME_ERRNO_TIMEOUT;
4403                                                                 goto ERROR;
4404                                                         }
4405                                                 }
4406                                         } else {
4407                                                 while (!
4408                                                        (inl
4409                                                         (instance->
4410                                                          status_reg) &
4411                                                         ME4600_AO_STATUS_BIT_FSM))
4412                                                 {
4413                                                         interruptible_sleep_on_timeout
4414                                                             (&queue, 1);
4415
4416                                                         if (signal_pending
4417                                                             (current)) {
4418                                                                 PERROR
4419                                                                     ("Wait on start of state machine interrupted.\n");
4420                                                                 stop_immediately
4421                                                                     (instance);
4422                                                                 err =
4423                                                                     ME_ERRNO_SIGNAL;
4424                                                                 goto ERROR;
4425                                                         }
4426                                                 }
4427                                         }
4428                                 } else if (start_mode ==
4429                                            ME_START_MODE_NONBLOCKING) {
4430                                 } else {
4431                                         PERROR
4432                                             ("Invalid start mode specified.\n");
4433                                         err = ME_ERRNO_INVALID_START_MODE;
4434                                         goto ERROR;
4435                                 }
4436                         } else {
4437                                 tmp &=
4438                                     ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4439                                       ME4600_AO_CTRL_BIT_STOP |
4440                                       ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4441                                 outl(tmp, instance->ctrl_reg);
4442                                 spin_unlock_irqrestore(&instance->
4443                                                        subdevice_lock,
4444                                                        cpu_flags);
4445                         }
4446                 } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx)) == (0x1 << instance->ao_idx)) { // Synchronous wraparound with sw trigger
4447
4448                         if ((inl(instance->status_reg) &
4449                              ME4600_AO_STATUS_BIT_FSM)) {
4450                                 spin_unlock_irqrestore(&instance->
4451                                                        subdevice_lock,
4452                                                        cpu_flags);
4453                                 PERROR("Conversion is already running.\n");
4454                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4455                                 goto ERROR;
4456                         }
4457
4458                         tmp &=
4459                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4460                               ME4600_AO_CTRL_BIT_STOP |
4461                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4462
4463                         outl(tmp, instance->ctrl_reg);
4464
4465                         if (flags & ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
4466                                 outl(0x8000, instance->single_reg);
4467                                 instance->single_value = 0x8000;
4468                         }
4469
4470                         spin_unlock_irqrestore(&instance->subdevice_lock,
4471                                                cpu_flags);
4472                 } else {        // Software start
4473
4474                         if ((inl(instance->status_reg) &
4475                              ME4600_AO_STATUS_BIT_FSM)) {
4476                                 spin_unlock_irqrestore(&instance->
4477                                                        subdevice_lock,
4478                                                        cpu_flags);
4479                                 PERROR("Conversion is already running.\n");
4480                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4481                                 goto ERROR;
4482                         }
4483
4484                         tmp &=
4485                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4486                               ME4600_AO_CTRL_BIT_STOP |
4487                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4488
4489                         outl(tmp, instance->ctrl_reg);
4490
4491                         outl(0x8000, instance->single_reg);
4492                         instance->single_value = 0x8000;
4493
4494                         spin_unlock_irqrestore(&instance->subdevice_lock,
4495                                                cpu_flags);
4496                 }
4497
4498                 break;
4499
4500         case 2:         // Continuous mode
4501                 if (tmp & ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG) {  // Externally triggered
4502
4503                         if ((inl(instance->status_reg) &
4504                              ME4600_AO_STATUS_BIT_FSM)) {
4505                                 spin_unlock_irqrestore(&instance->
4506                                                        subdevice_lock,
4507                                                        cpu_flags);
4508                                 PERROR("Conversion is already running.\n");
4509                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4510                                 goto ERROR;
4511                         }
4512
4513                         tmp &=
4514                             ~(ME4600_AO_CTRL_BIT_STOP |
4515                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4516                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4517                         outl(tmp, instance->ctrl_reg);
4518                         instance->wrap_remaining = instance->wrap_count;
4519                         instance->circ_buf.tail = 0;
4520                         spin_unlock_irqrestore(&instance->subdevice_lock,
4521                                                cpu_flags);
4522
4523                         if (start_mode == ME_START_MODE_BLOCKING) {
4524                                 init_waitqueue_head(&queue);
4525
4526                                 if (delay) {
4527                                         ref = jiffies;
4528
4529                                         while (!
4530                                                (inl(instance->status_reg) &
4531                                                 ME4600_AO_STATUS_BIT_FSM)) {
4532                                                 interruptible_sleep_on_timeout
4533                                                     (&queue, 1);
4534
4535                                                 if (signal_pending(current)) {
4536                                                         PERROR
4537                                                             ("Wait on start of state machine interrupted.\n");
4538                                                         stop_immediately
4539                                                             (instance);
4540                                                         err = ME_ERRNO_SIGNAL;
4541                                                         goto ERROR;
4542                                                 }
4543
4544                                                 if (((jiffies - ref) >= delay)) {
4545                                                         PERROR
4546                                                             ("Timeout reached.\n");
4547                                                         stop_immediately
4548                                                             (instance);
4549                                                         err = ME_ERRNO_TIMEOUT;
4550                                                         goto ERROR;
4551                                                 }
4552                                         }
4553                                 } else {
4554                                         while (!
4555                                                (inl(instance->status_reg) &
4556                                                 ME4600_AO_STATUS_BIT_FSM)) {
4557                                                 interruptible_sleep_on_timeout
4558                                                     (&queue, 1);
4559
4560                                                 if (signal_pending(current)) {
4561                                                         PERROR
4562                                                             ("Wait on start of state machine interrupted.\n");
4563                                                         stop_immediately
4564                                                             (instance);
4565                                                         err = ME_ERRNO_SIGNAL;
4566                                                         goto ERROR;
4567                                                 }
4568                                         }
4569                                 }
4570                         } else if (start_mode == ME_START_MODE_NONBLOCKING) {
4571                                 /* Do nothing */
4572                         } else {
4573                                 PERROR("Invalid start mode specified.\n");
4574                                 stop_immediately(instance);
4575                                 err = ME_ERRNO_INVALID_START_MODE;
4576                                 goto ERROR;
4577                         }
4578                 } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx)) == (0x10000 << instance->ao_idx)) {     // Synchronous with external trigger
4579
4580                         if ((inl(instance->status_reg) &
4581                              ME4600_AO_STATUS_BIT_FSM)) {
4582                                 spin_unlock_irqrestore(&instance->
4583                                                        subdevice_lock,
4584                                                        cpu_flags);
4585                                 PERROR("Conversion is already running.\n");
4586                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4587                                 goto ERROR;
4588                         }
4589
4590                         if (flags & ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
4591                                 tmp |=
4592                                     ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG |
4593                                     ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4594                                 tmp &=
4595                                     ~(ME4600_AO_CTRL_BIT_STOP |
4596                                       ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4597                                 outl(tmp, instance->ctrl_reg);
4598                                 instance->wrap_remaining = instance->wrap_count;
4599                                 instance->circ_buf.tail = 0;
4600
4601                                 spin_unlock_irqrestore(&instance->
4602                                                        subdevice_lock,
4603                                                        cpu_flags);
4604
4605                                 if (start_mode == ME_START_MODE_BLOCKING) {
4606                                         init_waitqueue_head(&queue);
4607
4608                                         if (delay) {
4609                                                 ref = jiffies;
4610
4611                                                 while (!
4612                                                        (inl
4613                                                         (instance->
4614                                                          status_reg) &
4615                                                         ME4600_AO_STATUS_BIT_FSM))
4616                                                 {
4617                                                         interruptible_sleep_on_timeout
4618                                                             (&queue, 1);
4619
4620                                                         if (signal_pending
4621                                                             (current)) {
4622                                                                 PERROR
4623                                                                     ("Wait on start of state machine interrupted.\n");
4624                                                                 stop_immediately
4625                                                                     (instance);
4626                                                                 err =
4627                                                                     ME_ERRNO_SIGNAL;
4628                                                                 goto ERROR;
4629                                                         }
4630
4631                                                         if (((jiffies - ref) >=
4632                                                              delay)) {
4633                                                                 PERROR
4634                                                                     ("Timeout reached.\n");
4635                                                                 stop_immediately
4636                                                                     (instance);
4637                                                                 err =
4638                                                                     ME_ERRNO_TIMEOUT;
4639                                                                 goto ERROR;
4640                                                         }
4641                                                 }
4642                                         } else {
4643                                                 while (!
4644                                                        (inl
4645                                                         (instance->
4646                                                          status_reg) &
4647                                                         ME4600_AO_STATUS_BIT_FSM))
4648                                                 {
4649                                                         interruptible_sleep_on_timeout
4650                                                             (&queue, 1);
4651
4652                                                         if (signal_pending
4653                                                             (current)) {
4654                                                                 PERROR
4655                                                                     ("Wait on start of state machine interrupted.\n");
4656                                                                 stop_immediately
4657                                                                     (instance);
4658                                                                 err =
4659                                                                     ME_ERRNO_SIGNAL;
4660                                                                 goto ERROR;
4661                                                         }
4662                                                 }
4663                                         }
4664                                 } else if (start_mode ==
4665                                            ME_START_MODE_NONBLOCKING) {
4666                                 } else {
4667                                         PERROR
4668                                             ("Invalid start mode specified.\n");
4669                                         stop_immediately(instance);
4670                                         err = ME_ERRNO_INVALID_START_MODE;
4671                                         goto ERROR;
4672                                 }
4673                         } else {
4674                                 tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4675                                 tmp &=
4676                                     ~(ME4600_AO_CTRL_BIT_STOP |
4677                                       ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4678                                 outl(tmp, instance->ctrl_reg);
4679                                 instance->wrap_remaining = instance->wrap_count;
4680                                 instance->circ_buf.tail = 0;
4681                                 spin_unlock_irqrestore(&instance->
4682                                                        subdevice_lock,
4683                                                        cpu_flags);
4684                         }
4685                 } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx)) == (0x1 << instance->ao_idx)) { // Synchronous wraparound with sw trigger
4686
4687                         if ((inl(instance->status_reg) &
4688                              ME4600_AO_STATUS_BIT_FSM)) {
4689                                 spin_unlock_irqrestore(&instance->
4690                                                        subdevice_lock,
4691                                                        cpu_flags);
4692                                 PERROR("Conversion is already running.\n");
4693                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4694                                 goto ERROR;
4695                         }
4696
4697                         tmp &=
4698                             ~(ME4600_AO_CTRL_BIT_STOP |
4699                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4700                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4701                         instance->wrap_remaining = instance->wrap_count;
4702                         instance->circ_buf.tail = 0;
4703                         PDEBUG("CTRL Reg = 0x%X.\n", inl(instance->ctrl_reg));
4704                         outl(tmp, instance->ctrl_reg);
4705
4706                         if (flags & ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
4707                                 outl(0x8000, instance->single_reg);
4708                                 instance->single_value = 0x8000;
4709                         }
4710
4711                         spin_unlock_irqrestore(&instance->subdevice_lock,
4712                                                cpu_flags);
4713                 } else {        // Software start
4714
4715                         if ((inl(instance->status_reg) &
4716                              ME4600_AO_STATUS_BIT_FSM)) {
4717                                 spin_unlock_irqrestore(&instance->
4718                                                        subdevice_lock,
4719                                                        cpu_flags);
4720                                 PERROR("Conversion is already running.\n");
4721                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4722                                 goto ERROR;
4723                         }
4724
4725                         tmp &=
4726                             ~(ME4600_AO_CTRL_BIT_STOP |
4727                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4728
4729                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4730                         outl(tmp, instance->ctrl_reg);
4731                         outl(0x8000, instance->single_reg);
4732                         instance->single_value = 0x8000;
4733                         instance->wrap_remaining = instance->wrap_count;
4734                         instance->circ_buf.tail = 0;
4735                         spin_unlock_irqrestore(&instance->subdevice_lock,
4736                                                cpu_flags);
4737                 }
4738
4739                 break;
4740
4741         default:
4742                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4743                 PERROR("Invalid mode configured.\n");
4744                 err = ME_ERRNO_INTERNAL;
4745                 goto ERROR;
4746         }
4747
4748 ERROR:
4749
4750         ME_SUBDEVICE_EXIT;
4751
4752         return err;
4753 }
4754
4755 static int me4600_ao_io_stream_status(me_subdevice_t *subdevice,
4756                                       struct file *filep,
4757                                       int wait,
4758                                       int *status, int *values, int flags)
4759 {
4760         me4600_ao_subdevice_t *instance;
4761         int err = ME_ERRNO_SUCCESS;
4762         wait_queue_head_t queue;
4763
4764         PDEBUG("executed.\n");
4765
4766         instance = (me4600_ao_subdevice_t *) subdevice;
4767
4768         init_waitqueue_head(&queue);
4769
4770         if (!instance->fifo) {
4771                 PERROR("Not a streaming ao.\n");
4772                 return ME_ERRNO_NOT_SUPPORTED;
4773         }
4774
4775         ME_SUBDEVICE_ENTER;
4776
4777         if (wait == ME_WAIT_NONE) {
4778                 *status =
4779                     (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ?
4780                     ME_STATUS_BUSY : ME_STATUS_IDLE;
4781                 *values = me_circ_buf_space(&instance->circ_buf);
4782         } else if (wait == ME_WAIT_IDLE) {
4783                 while (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) {
4784                         interruptible_sleep_on_timeout(&queue, 1);
4785
4786                         if (instance->flags & ME4600_AO_FLAGS_BROKEN_PIPE) {
4787                                 PERROR("Output stream was interrupted.\n");
4788                                 *status = ME_STATUS_ERROR;
4789                                 err = ME_ERRNO_SUCCESS;
4790                                 goto ERROR;
4791                         }
4792
4793                         if (signal_pending(current)) {
4794                                 PERROR
4795                                     ("Wait on state machine interrupted by signal.\n");
4796                                 *status = ME_STATUS_INVALID;
4797                                 err = ME_ERRNO_SIGNAL;
4798                                 goto ERROR;
4799                         }
4800                 }
4801
4802                 *status = ME_STATUS_IDLE;
4803
4804                 *values = me_circ_buf_space(&instance->circ_buf);
4805         } else {
4806                 PERROR("Invalid wait argument specified.\n");
4807                 *status = ME_STATUS_INVALID;
4808                 err = ME_ERRNO_INVALID_WAIT;
4809                 goto ERROR;
4810         }
4811
4812 ERROR:
4813
4814         ME_SUBDEVICE_EXIT;
4815
4816         return err;
4817 }
4818
4819 static int me4600_ao_io_stream_stop(me_subdevice_t *subdevice,
4820                                     struct file *filep,
4821                                     int stop_mode, int flags)
4822 {
4823         int err = ME_ERRNO_SUCCESS;
4824         me4600_ao_subdevice_t *instance;
4825         unsigned long cpu_flags;
4826         unsigned long tmp;
4827
4828         PDEBUG("executed.\n");
4829
4830         instance = (me4600_ao_subdevice_t *) subdevice;
4831
4832         if (!instance->fifo) {
4833                 PERROR("Not a streaming ao.\n");
4834                 return ME_ERRNO_NOT_SUPPORTED;
4835         }
4836
4837         ME_SUBDEVICE_ENTER;
4838
4839         if (stop_mode == ME_STOP_MODE_IMMEDIATE) {
4840                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4841                 tmp = inl(instance->ctrl_reg);
4842                 tmp |=
4843                     ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
4844                 outl(tmp, instance->ctrl_reg);
4845
4846                 while (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ;
4847
4848                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4849         } else if (stop_mode == ME_STOP_MODE_LAST_VALUE) {
4850                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4851                 tmp = inl(instance->ctrl_reg);
4852                 tmp |= ME4600_AO_CTRL_BIT_STOP;
4853                 outl(tmp, instance->ctrl_reg);
4854                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4855         } else {
4856                 PERROR("Invalid stop mode specified.\n");
4857                 err = ME_ERRNO_INVALID_STOP_MODE;
4858                 goto ERROR;
4859         }
4860
4861 ERROR:
4862
4863         ME_SUBDEVICE_EXIT;
4864
4865         return err;
4866 }
4867
4868 static int me4600_ao_io_stream_write(me_subdevice_t *subdevice,
4869                                      struct file *filep,
4870                                      int write_mode,
4871                                      int *values, int *count, int flags)
4872 {
4873         int err = ME_ERRNO_SUCCESS;
4874         me4600_ao_subdevice_t *instance;
4875         unsigned long tmp;
4876         int i;
4877         int value;
4878         int cnt = *count;
4879         int c;
4880         int k;
4881         int ret = 0;
4882         unsigned long cpu_flags = 0;
4883
4884         PDEBUG("executed.\n");
4885
4886         instance = (me4600_ao_subdevice_t *) subdevice;
4887
4888         if (!instance->fifo) {
4889                 PERROR("Not a streaming ao.\n");
4890                 return ME_ERRNO_NOT_SUPPORTED;
4891         }
4892
4893         ME_SUBDEVICE_ENTER;
4894
4895         if (*count <= 0) {
4896                 PERROR("Invalid count of values specified.\n");
4897                 err = ME_ERRNO_INVALID_VALUE_COUNT;
4898                 goto ERROR;
4899         }
4900
4901         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4902
4903         tmp = inl(instance->ctrl_reg);
4904
4905         switch (tmp & 0x3) {
4906
4907         case 1:         // Wraparound mode
4908                 if (instance->bosch_fw) {       // Bosch firmware
4909                         spin_unlock_irqrestore(&instance->subdevice_lock,
4910                                                cpu_flags);
4911
4912                         if (cnt != 7) {
4913                                 PERROR
4914                                     ("Invalid count of values specified. 7 expected.\n");
4915                                 err = ME_ERRNO_INVALID_VALUE_COUNT;
4916                                 goto ERROR;
4917                         }
4918
4919                         for (i = 0; i < 7; i++) {
4920                                 if (get_user(value, values)) {
4921                                         PERROR
4922                                             ("Can't copy value from user space.\n");
4923                                         err = ME_ERRNO_INTERNAL;
4924                                         goto ERROR;
4925                                 }
4926
4927                                 if (i == 0) {
4928                                         /* Maximum voltage */
4929                                         value <<= 16;
4930                                         value |=
4931                                             inl(instance->reg_base +
4932                                                 0xD4) & 0xFFFF;
4933                                         outl(value, instance->reg_base + 0xD4);
4934                                 } else if (i == 1) {
4935                                         /* Minimum voltage */
4936                                         value &= 0xFFFF;
4937                                         value |=
4938                                             inl(instance->reg_base +
4939                                                 0xD4) & 0xFFFF0000;
4940                                         outl(value, instance->reg_base + 0xD4);
4941                                 } else if (i == 2) {
4942                                         /* Delta up */
4943                                         value <<= 16;
4944                                         value |=
4945                                             inl(instance->reg_base +
4946                                                 0xD8) & 0xFFFF;
4947                                         outl(value, instance->reg_base + 0xD8);
4948                                 } else if (i == 3) {
4949                                         /* Delta down */
4950                                         value &= 0xFFFF;
4951                                         value |=
4952                                             inl(instance->reg_base +
4953                                                 0xD8) & 0xFFFF0000;
4954                                         outl(value, instance->reg_base + 0xD8);
4955                                 } else if (i == 4) {
4956                                         /* Start value */
4957                                         outl(value, instance->reg_base + 0xDC);
4958                                 } else if (i == 5) {
4959                                         /* Invert */
4960                                         if (value) {
4961                                                 value = inl(instance->ctrl_reg);
4962                                                 value |= 0x100;
4963                                                 outl(value, instance->ctrl_reg);
4964                                         } else {
4965                                                 value = inl(instance->ctrl_reg);
4966                                                 value &= ~0x100;
4967                                                 outl(value, instance->ctrl_reg);
4968                                         }
4969                                 } else if (i == 6) {
4970                                         /* Timer for positive ramp */
4971                                         outl(value, instance->reg_base + 0xE0);
4972                                 }
4973
4974                                 values++;
4975                         }
4976                 } else {        // Normal firmware
4977                         PDEBUG("Write for wraparound mode.\n");
4978
4979                         if (inl(instance->status_reg) &
4980                             ME4600_AO_STATUS_BIT_FSM) {
4981                                 spin_unlock_irqrestore(&instance->
4982                                                        subdevice_lock,
4983                                                        cpu_flags);
4984                                 PERROR
4985                                     ("There is already a conversion running.\n");
4986                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4987                                 goto ERROR;
4988                         }
4989
4990                         tmp |= ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
4991                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_FIFO;
4992                         outl(tmp, instance->ctrl_reg);
4993                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_FIFO;
4994
4995                         if ((*count > ME4600_AO_FIFO_COUNT) ||
4996                             ((instance->
4997                               flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) ==
4998                              ME4600_AO_FLAGS_SW_WRAP_MODE_FIN)) {
4999                                 tmp &=
5000                                     ~(ME4600_AO_CTRL_BIT_MODE_0 |
5001                                       ME4600_AO_CTRL_BIT_MODE_1);
5002                                 tmp |= ME4600_AO_CTRL_BIT_MODE_1;
5003                         }
5004
5005                         outl(tmp, instance->ctrl_reg);
5006                         spin_unlock_irqrestore(&instance->subdevice_lock,
5007                                                cpu_flags);
5008
5009                         if ((*count <= ME4600_AO_FIFO_COUNT) &&
5010                             ((instance->
5011                               flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) ==
5012                              ME4600_AO_FLAGS_SW_WRAP_MODE_INF)) {
5013                                 for (i = 0; i < *count; i++) {
5014                                         if (get_user(value, values + i)) {
5015                                                 PERROR
5016                                                     ("Cannot copy value from user space.\n");
5017                                                 err = ME_ERRNO_INTERNAL;
5018                                                 goto ERROR;
5019                                         }
5020
5021                                         if (instance->ao_idx & 0x1)
5022                                                 value <<= 16;
5023
5024                                         outl(value, instance->fifo_reg);
5025                                 }
5026                         } else if ((*count <= ME4600_AO_CIRC_BUF_COUNT) &&
5027                                    ((instance->
5028                                      flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK)
5029                                     == ME4600_AO_FLAGS_SW_WRAP_MODE_INF)) {
5030                                 for (i = 0; i < *count; i++) {
5031                                         if (get_user(value, values + i)) {
5032                                                 PERROR
5033                                                     ("Cannot copy value from user space.\n");
5034                                                 err = ME_ERRNO_INTERNAL;
5035                                                 goto ERROR;
5036                                         }
5037
5038                                         instance->circ_buf.buf[i] = value;      /* Used to hold the values. */
5039                                 }
5040
5041                                 instance->circ_buf.tail = 0;    /* Used as the current read position. */
5042                                 instance->circ_buf.head = *count;       /* Used as the buffer size. */
5043
5044                                 /* Preload the FIFO. */
5045
5046                                 for (i = 0; i < ME4600_AO_FIFO_COUNT;
5047                                      i++, instance->circ_buf.tail++) {
5048                                         if (instance->circ_buf.tail >=
5049                                             instance->circ_buf.head)
5050                                                 instance->circ_buf.tail = 0;
5051
5052                                         if (instance->ao_idx & 0x1)
5053                                                 outl(instance->circ_buf.
5054                                                      buf[instance->circ_buf.
5055                                                          tail] << 16,
5056                                                      instance->fifo_reg);
5057                                         else
5058                                                 outl(instance->circ_buf.
5059                                                      buf[instance->circ_buf.
5060                                                          tail],
5061                                                      instance->fifo_reg);
5062                                 }
5063                         } else if ((*count <= ME4600_AO_CIRC_BUF_COUNT) &&
5064                                    ((instance->
5065                                      flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK)
5066                                     == ME4600_AO_FLAGS_SW_WRAP_MODE_FIN)) {
5067                                 unsigned int preload_count;
5068
5069                                 for (i = 0; i < *count; i++) {
5070                                         if (get_user(value, values + i)) {
5071                                                 PERROR
5072                                                     ("Cannot copy value from user space.\n");
5073                                                 err = ME_ERRNO_INTERNAL;
5074                                                 goto ERROR;
5075                                         }
5076
5077                                         instance->circ_buf.buf[i] = value;      /* Used to hold the values. */
5078                                 }
5079
5080                                 instance->circ_buf.tail = 0;    /* Used as the current read position. */
5081                                 instance->circ_buf.head = *count;       /* Used as the buffer size. */
5082
5083                                 /* Try to preload the whole FIFO. */
5084                                 preload_count = ME4600_AO_FIFO_COUNT;
5085
5086                                 if (preload_count > instance->wrap_count)
5087                                         preload_count = instance->wrap_count;
5088
5089                                 /* Preload the FIFO. */
5090                                 for (i = 0; i < preload_count;
5091                                      i++, instance->circ_buf.tail++) {
5092                                         if (instance->circ_buf.tail >=
5093                                             instance->circ_buf.head)
5094                                                 instance->circ_buf.tail = 0;
5095
5096                                         if (instance->ao_idx & 0x1)
5097                                                 outl(instance->circ_buf.
5098                                                      buf[instance->circ_buf.
5099                                                          tail] << 16,
5100                                                      instance->fifo_reg);
5101                                         else
5102                                                 outl(instance->circ_buf.
5103                                                      buf[instance->circ_buf.
5104                                                          tail],
5105                                                      instance->fifo_reg);
5106                                 }
5107
5108                                 instance->wrap_remaining =
5109                                     instance->wrap_count - preload_count;
5110                         } else {
5111                                 PERROR("To many values written.\n");
5112                                 err = ME_ERRNO_INVALID_VALUE_COUNT;
5113                                 goto ERROR;
5114                         }
5115                 }
5116
5117                 break;
5118
5119         case 2:         // Continuous mode
5120                 /* Check if in SW wrapround mode */
5121                 if (instance->flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) {
5122                         spin_unlock_irqrestore(&instance->subdevice_lock,
5123                                                cpu_flags);
5124                         PERROR("Subdevice is configured SW wrapround mode.\n");
5125                         err = ME_ERRNO_PREVIOUS_CONFIG;
5126                         goto ERROR;
5127                 }
5128
5129                 switch (write_mode) {
5130
5131                 case ME_WRITE_MODE_BLOCKING:
5132                         spin_unlock_irqrestore(&instance->subdevice_lock,
5133                                                cpu_flags);
5134
5135                         PDEBUG("Write for blocking continuous mode.\n");
5136
5137                         while (cnt > 0) {
5138                                 wait_event_interruptible(instance->wait_queue,
5139                                                          (c =
5140                                                           me_circ_buf_space_to_end
5141                                                           (&instance->
5142                                                            circ_buf)));
5143
5144                                 if (instance->
5145                                     flags & ME4600_AO_FLAGS_BROKEN_PIPE) {
5146                                         PERROR
5147                                             ("Broken pipe in blocking write.\n");
5148                                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
5149                                         goto ERROR;
5150                                 } else if (signal_pending(current)) {
5151                                         PERROR
5152                                             ("Wait for free buffer interrupted from signal.\n");
5153                                         err = ME_ERRNO_SIGNAL;
5154                                         goto ERROR;
5155                                 }
5156
5157                                 PDEBUG("Space to end = %d.\n", c);
5158
5159                                 /* Only able to write size of free buffer or size of count */
5160
5161                                 if (cnt < c)
5162                                         c = cnt;
5163                                 k = sizeof(int) * c;
5164                                 k -= copy_from_user(instance->circ_buf.buf +
5165                                                     instance->circ_buf.head,
5166                                                     values, k);
5167                                 c = k / sizeof(int);
5168
5169                                 PDEBUG("Copy %d values from user space.\n", c);
5170
5171                                 if (!c) {
5172                                         PERROR
5173                                             ("Cannot copy values from user space.\n");
5174                                         err = ME_ERRNO_INTERNAL;
5175                                         goto ERROR;
5176                                 }
5177
5178                                 instance->circ_buf.head =
5179                                     (instance->circ_buf.head +
5180                                      c) & (instance->circ_buf.mask);
5181
5182                                 values += c;
5183                                 cnt -= c;
5184                                 ret += c;
5185
5186                                 /* Values are now available so enable interrupts */
5187                                 spin_lock_irqsave(&instance->subdevice_lock,
5188                                                   cpu_flags);
5189
5190                                 if (me_circ_buf_space(&instance->circ_buf)) {
5191                                         tmp = inl(instance->ctrl_reg);
5192                                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5193                                         outl(tmp, instance->ctrl_reg);
5194                                 }
5195
5196                                 spin_unlock_irqrestore(&instance->
5197                                                        subdevice_lock,
5198                                                        cpu_flags);
5199                         }
5200
5201                         *count = ret;
5202
5203                         break;
5204
5205                 case ME_WRITE_MODE_NONBLOCKING:
5206                         spin_unlock_irqrestore(&instance->subdevice_lock,
5207                                                cpu_flags);
5208
5209                         PDEBUG("Write for non blocking continuous mode.\n");
5210
5211                         while (cnt > 0) {
5212                                 if (instance->
5213                                     flags & ME4600_AO_FLAGS_BROKEN_PIPE) {
5214                                         PERROR
5215                                             ("ME4600:Broken pipe in nonblocking write.\n");
5216                                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
5217                                         goto ERROR;
5218                                 }
5219
5220                                 c = me_circ_buf_space_to_end(&instance->
5221                                                              circ_buf);
5222
5223                                 if (!c) {
5224                                         PDEBUG
5225                                             ("Returning from nonblocking write.\n");
5226                                         break;
5227                                 }
5228
5229                                 PDEBUG("Space to end = %d.\n", c);
5230
5231                                 /* Only able to write size of free buffer or size of count */
5232
5233                                 if (cnt < c)
5234                                         c = cnt;
5235                                 k = sizeof(int) * c;
5236                                 k -= copy_from_user(instance->circ_buf.buf +
5237                                                     instance->circ_buf.head,
5238                                                     values, k);
5239                                 c = k / sizeof(int);
5240
5241                                 PDEBUG("Copy %d values from user space.\n", c);
5242
5243                                 if (!c) {
5244                                         PERROR
5245                                             ("Cannot copy values from user space.\n");
5246                                         err = ME_ERRNO_INTERNAL;
5247                                         goto ERROR;
5248                                 }
5249
5250                                 instance->circ_buf.head =
5251                                     (instance->circ_buf.head +
5252                                      c) & (instance->circ_buf.mask);
5253
5254                                 values += c;
5255                                 cnt -= c;
5256                                 ret += c;
5257
5258                                 /* Values are now available so enable interrupts */
5259                                 spin_lock_irqsave(&instance->subdevice_lock,
5260                                                   cpu_flags);
5261
5262                                 if (me_circ_buf_space(&instance->circ_buf)) {
5263                                         tmp = inl(instance->ctrl_reg);
5264                                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5265                                         outl(tmp, instance->ctrl_reg);
5266                                 }
5267
5268                                 spin_unlock_irqrestore(&instance->
5269                                                        subdevice_lock,
5270                                                        cpu_flags);
5271                         }
5272
5273                         *count = ret;
5274
5275                         break;
5276
5277                 case ME_WRITE_MODE_PRELOAD:
5278                         PDEBUG("Write for preload continuous mode.\n");
5279
5280                         if ((inl(instance->status_reg) &
5281                              ME4600_AO_STATUS_BIT_FSM)) {
5282                                 spin_unlock_irqrestore(&instance->
5283                                                        subdevice_lock,
5284                                                        cpu_flags);
5285                                 PERROR
5286                                     ("Can't Preload DAC FIFO while conversion is running.\n");
5287                                 err = ME_ERRNO_SUBDEVICE_BUSY;
5288                                 goto ERROR;
5289                         }
5290
5291                         tmp = inl(instance->ctrl_reg);
5292
5293                         tmp |=
5294                             ME4600_AO_CTRL_BIT_STOP |
5295                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
5296                         outl(tmp, instance->ctrl_reg);
5297                         tmp &=
5298                             ~(ME4600_AO_CTRL_BIT_ENABLE_FIFO |
5299                               ME4600_AO_CTRL_BIT_ENABLE_IRQ);
5300                         outl(tmp, instance->ctrl_reg);
5301                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_FIFO;
5302                         outl(tmp, instance->ctrl_reg);
5303
5304                         instance->circ_buf.head = 0;
5305                         instance->circ_buf.tail = 0;
5306                         instance->flags &= ~ME4600_AO_FLAGS_BROKEN_PIPE;
5307
5308                         spin_unlock_irqrestore(&instance->subdevice_lock,
5309                                                cpu_flags);
5310
5311                         c = ME4600_AO_FIFO_COUNT;
5312
5313                         if (cnt < c)
5314                                 c = cnt;
5315
5316                         for (i = 0; i < c; i++) {
5317                                 if (get_user(value, values)) {
5318                                         PERROR
5319                                             ("Can't copy value from user space.\n");
5320                                         err = ME_ERRNO_INTERNAL;
5321                                         goto ERROR;
5322                                 }
5323
5324                                 if (instance->ao_idx & 0x1)
5325                                         value <<= 16;
5326
5327                                 outl(value, instance->fifo_reg);
5328
5329                                 values++;
5330                         }
5331
5332                         cnt -= c;
5333
5334                         ret += c;
5335
5336                         PDEBUG("Wrote %d values to fifo.\n", c);
5337
5338                         while (1) {
5339                                 c = me_circ_buf_space_to_end(&instance->
5340                                                              circ_buf);
5341
5342                                 if (c == 0)
5343                                         break;
5344
5345                                 if (cnt < c)
5346                                         c = cnt;
5347
5348                                 if (c <= 0)
5349                                         break;
5350
5351                                 k = sizeof(int) * c;
5352
5353                                 k -= copy_from_user(instance->circ_buf.buf +
5354                                                     instance->circ_buf.head,
5355                                                     values, k);
5356
5357                                 c = k / sizeof(int);
5358
5359                                 PDEBUG("Wrote %d values to circular buffer.\n",
5360                                        c);
5361
5362                                 if (!c) {
5363                                         PERROR
5364                                             ("Can't copy values from user space.\n");
5365                                         err = ME_ERRNO_INTERNAL;
5366                                         goto ERROR;
5367                                 }
5368
5369                                 instance->circ_buf.head =
5370                                     (instance->circ_buf.head +
5371                                      c) & (instance->circ_buf.mask);
5372
5373                                 values += c;
5374                                 cnt -= c;
5375                                 ret += c;
5376                         }
5377
5378                         *count = ret;
5379
5380                         break;
5381
5382                 default:
5383                         spin_unlock_irqrestore(&instance->subdevice_lock,
5384                                                cpu_flags);
5385
5386                         PERROR("Invalid write mode specified.\n");
5387
5388                         err = ME_ERRNO_INVALID_WRITE_MODE;
5389
5390                         goto ERROR;
5391                 }
5392
5393                 break;
5394
5395         default:                // Single mode of invalid
5396                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
5397                 PERROR("Subdevice is configured in single mode.\n");
5398                 err = ME_ERRNO_PREVIOUS_CONFIG;
5399                 goto ERROR;
5400         }
5401
5402 ERROR:
5403
5404         ME_SUBDEVICE_EXIT;
5405
5406         return err;
5407 }
5408
5409 static irqreturn_t me4600_ao_isr(int irq, void *dev_id)
5410 {
5411         unsigned long tmp;
5412         int value;
5413         me4600_ao_subdevice_t *instance = dev_id;
5414         int i;
5415         int c = 0;
5416         int c1 = 0;
5417
5418         if (irq != instance->irq) {
5419                 PDEBUG("Incorrect interrupt num: %d.\n", irq);
5420                 return IRQ_NONE;
5421         }
5422
5423         if (!((0x1 << (instance->ao_idx + 3)) & inl(instance->irq_status_reg))) {
5424                 return IRQ_NONE;
5425         }
5426
5427         PDEBUG("executed.\n");
5428
5429         tmp = inl(instance->status_reg);
5430
5431         if (!(tmp & ME4600_AO_STATUS_BIT_EF) &&
5432             (tmp & ME4600_AO_STATUS_BIT_HF) &&
5433             (tmp & ME4600_AO_STATUS_BIT_HF)) {
5434                 c = ME4600_AO_FIFO_COUNT;
5435                 PDEBUG("Fifo empty.\n");
5436         } else if ((tmp & ME4600_AO_STATUS_BIT_EF) &&
5437                    (tmp & ME4600_AO_STATUS_BIT_HF) &&
5438                    (tmp & ME4600_AO_STATUS_BIT_HF)) {
5439                 c = ME4600_AO_FIFO_COUNT / 2;
5440                 PDEBUG("Fifo under half full.\n");
5441         } else {
5442                 c = 0;
5443                 PDEBUG("Fifo full.\n");
5444         }
5445
5446         PDEBUG("Try to write 0x%04X values.\n", c);
5447
5448         if ((instance->flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) ==
5449             ME4600_AO_FLAGS_SW_WRAP_MODE_INF) {
5450                 while (c) {
5451                         c1 = c;
5452
5453                         if (c1 > (instance->circ_buf.head - instance->circ_buf.tail))   /* Only up to the end of the buffer */
5454                                 c1 = (instance->circ_buf.head -
5455                                       instance->circ_buf.tail);
5456
5457                         /* Write the values to the FIFO */
5458                         for (i = 0; i < c1; i++, instance->circ_buf.tail++, c--) {
5459                                 if (instance->ao_idx & 0x1)
5460                                         outl(instance->circ_buf.
5461                                              buf[instance->circ_buf.tail] << 16,
5462                                              instance->fifo_reg);
5463                                 else
5464                                         outl(instance->circ_buf.
5465                                              buf[instance->circ_buf.tail],
5466                                              instance->fifo_reg);
5467                         }
5468
5469                         if (instance->circ_buf.tail >= instance->circ_buf.head) /* Start from beginning */
5470                                 instance->circ_buf.tail = 0;
5471                 }
5472
5473                 spin_lock(&instance->subdevice_lock);
5474
5475                 tmp = inl(instance->ctrl_reg);
5476                 tmp |= ME4600_AO_CTRL_BIT_RESET_IRQ;
5477                 outl(tmp, instance->ctrl_reg);
5478                 tmp &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
5479                 outl(tmp, instance->ctrl_reg);
5480
5481                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
5482                         PERROR("Broken pipe.\n");
5483                         instance->flags |= ME4600_AO_FLAGS_BROKEN_PIPE;
5484                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5485                         outl(tmp, instance->ctrl_reg);
5486                 }
5487
5488                 spin_unlock(&instance->subdevice_lock);
5489         } else if ((instance->flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) ==
5490                    ME4600_AO_FLAGS_SW_WRAP_MODE_FIN) {
5491                 while (c && instance->wrap_remaining) {
5492                         c1 = c;
5493
5494                         if (c1 > (instance->circ_buf.head - instance->circ_buf.tail))   /* Only up to the end of the buffer */
5495                                 c1 = (instance->circ_buf.head -
5496                                       instance->circ_buf.tail);
5497
5498                         if (c1 > instance->wrap_remaining)      /* Only up to count of user defined number of values */
5499                                 c1 = instance->wrap_remaining;
5500
5501                         /* Write the values to the FIFO */
5502                         for (i = 0; i < c1;
5503                              i++, instance->circ_buf.tail++, c--,
5504                              instance->wrap_remaining--) {
5505                                 if (instance->ao_idx & 0x1)
5506                                         outl(instance->circ_buf.
5507                                              buf[instance->circ_buf.tail] << 16,
5508                                              instance->fifo_reg);
5509                                 else
5510                                         outl(instance->circ_buf.
5511                                              buf[instance->circ_buf.tail],
5512                                              instance->fifo_reg);
5513                         }
5514
5515                         if (instance->circ_buf.tail >= instance->circ_buf.head) /* Start from beginning */
5516                                 instance->circ_buf.tail = 0;
5517                 }
5518
5519                 spin_lock(&instance->subdevice_lock);
5520
5521                 tmp = inl(instance->ctrl_reg);
5522
5523                 if (!instance->wrap_remaining) {
5524                         PDEBUG("Finite SW wraparound done.\n");
5525                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5526                 }
5527
5528                 tmp |= ME4600_AO_CTRL_BIT_RESET_IRQ;
5529
5530                 outl(tmp, instance->ctrl_reg);
5531                 tmp &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
5532                 outl(tmp, instance->ctrl_reg);
5533
5534                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
5535                         PERROR("Broken pipe.\n");
5536                         instance->flags |= ME4600_AO_FLAGS_BROKEN_PIPE;
5537                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5538                         outl(tmp, instance->ctrl_reg);
5539                 }
5540
5541                 spin_unlock(&instance->subdevice_lock);
5542
5543         } else {                /* Regular continuous mode */
5544
5545                 while (1) {
5546                         c1 = me_circ_buf_values_to_end(&instance->circ_buf);
5547                         PDEBUG("Values to end = %d.\n", c1);
5548
5549                         if (c1 > c)
5550                                 c1 = c;
5551
5552                         if (c1 <= 0) {
5553                                 PDEBUG("Work done or buffer empty.\n");
5554                                 break;
5555                         }
5556
5557                         if (instance->ao_idx & 0x1) {
5558                                 for (i = 0; i < c1; i++) {
5559                                         value =
5560                                             *(instance->circ_buf.buf +
5561                                               instance->circ_buf.tail +
5562                                               i) << 16;
5563                                         outl(value, instance->fifo_reg);
5564                                 }
5565                         } else
5566                                 outsl(instance->fifo_reg,
5567                                       instance->circ_buf.buf +
5568                                       instance->circ_buf.tail, c1);
5569
5570                         instance->circ_buf.tail =
5571                             (instance->circ_buf.tail +
5572                              c1) & (instance->circ_buf.mask);
5573
5574                         PDEBUG("%d values wrote to port 0x%04X.\n", c1,
5575                                instance->fifo_reg);
5576
5577                         c -= c1;
5578                 }
5579
5580                 spin_lock(&instance->subdevice_lock);
5581
5582                 tmp = inl(instance->ctrl_reg);
5583
5584                 if (!me_circ_buf_values(&instance->circ_buf)) {
5585                         PDEBUG
5586                             ("Disable Interrupt because no values left in buffer.\n");
5587                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5588                 }
5589
5590                 tmp |= ME4600_AO_CTRL_BIT_RESET_IRQ;
5591
5592                 outl(tmp, instance->ctrl_reg);
5593                 tmp &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
5594                 outl(tmp, instance->ctrl_reg);
5595
5596                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
5597                         PDEBUG("Broken pipe in me4600_ao_isr.\n");
5598                         instance->flags |= ME4600_AO_FLAGS_BROKEN_PIPE;
5599                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5600                         outl(tmp, instance->ctrl_reg);
5601                 }
5602
5603                 spin_unlock(&instance->subdevice_lock);
5604
5605                 wake_up_interruptible(&instance->wait_queue);
5606         }
5607
5608         return IRQ_HANDLED;
5609 }
5610
5611 static void me4600_ao_destructor(struct me_subdevice *subdevice)
5612 {
5613         me4600_ao_subdevice_t *instance;
5614
5615         PDEBUG("executed.\n");
5616
5617         instance = (me4600_ao_subdevice_t *) subdevice;
5618
5619         free_irq(instance->irq, instance);
5620         kfree(instance->circ_buf.buf);
5621         me_subdevice_deinit(&instance->base);
5622         kfree(instance);
5623 }
5624
5625 me4600_ao_subdevice_t *me4600_ao_constructor(uint32_t reg_base,
5626                                              spinlock_t *preload_reg_lock,
5627                                              uint32_t *preload_flags,
5628                                              int ao_idx, int fifo, int irq)
5629 {
5630         me4600_ao_subdevice_t *subdevice;
5631         int err;
5632
5633         PDEBUG("executed.\n");
5634
5635         /* Allocate memory for subdevice instance */
5636         subdevice = kmalloc(sizeof(me4600_ao_subdevice_t), GFP_KERNEL);
5637
5638         if (!subdevice) {
5639                 PERROR("Cannot get memory for subdevice instance.\n");
5640                 return NULL;
5641         }
5642
5643         memset(subdevice, 0, sizeof(me4600_ao_subdevice_t));
5644
5645         /* Initialize subdevice base class */
5646         err = me_subdevice_init(&subdevice->base);
5647
5648         if (err) {
5649                 PERROR("Cannot initialize subdevice base class instance.\n");
5650                 kfree(subdevice);
5651                 return NULL;
5652         }
5653         // Initialize spin locks.
5654         spin_lock_init(&subdevice->subdevice_lock);
5655
5656         subdevice->preload_reg_lock = preload_reg_lock;
5657         subdevice->preload_flags = preload_flags;
5658
5659         /* Allocate and initialize circular buffer */
5660         subdevice->circ_buf.mask = ME4600_AO_CIRC_BUF_COUNT - 1;
5661         subdevice->circ_buf.buf = kmalloc(ME4600_AO_CIRC_BUF_SIZE, GFP_KERNEL);
5662
5663         if (!subdevice->circ_buf.buf) {
5664                 PERROR("Cannot initialize subdevice base class instance.\n");
5665                 me_subdevice_deinit((me_subdevice_t *) subdevice);
5666                 kfree(subdevice);
5667                 return NULL;
5668         }
5669
5670         memset(subdevice->circ_buf.buf, 0, ME4600_AO_CIRC_BUF_SIZE);
5671
5672         subdevice->circ_buf.head = 0;
5673         subdevice->circ_buf.tail = 0;
5674
5675         /* Initialize wait queue */
5676         init_waitqueue_head(&subdevice->wait_queue);
5677
5678         /* Initialize single value to 0V */
5679         subdevice->single_value = 0x8000;
5680
5681         /* Store analog output index */
5682         subdevice->ao_idx = ao_idx;
5683
5684         /* Store if analog output has fifo */
5685         subdevice->fifo = fifo;
5686
5687         /* Initialize registers */
5688
5689         if (ao_idx == 0) {
5690                 subdevice->ctrl_reg = reg_base + ME4600_AO_00_CTRL_REG;
5691                 subdevice->status_reg = reg_base + ME4600_AO_00_STATUS_REG;
5692                 subdevice->fifo_reg = reg_base + ME4600_AO_00_FIFO_REG;
5693                 subdevice->single_reg = reg_base + ME4600_AO_00_SINGLE_REG;
5694                 subdevice->timer_reg = reg_base + ME4600_AO_00_TIMER_REG;
5695                 subdevice->reg_base = reg_base;
5696
5697                 if (inl(subdevice->reg_base + ME4600_AO_BOSCH_REG) == 0x20000) {
5698                         PINFO("Bosch firmware in use for channel 0.\n");
5699                         subdevice->bosch_fw = 1;
5700                 } else {
5701                         subdevice->bosch_fw = 0;
5702                 }
5703         } else if (ao_idx == 1) {
5704                 subdevice->ctrl_reg = reg_base + ME4600_AO_01_CTRL_REG;
5705                 subdevice->status_reg = reg_base + ME4600_AO_01_STATUS_REG;
5706                 subdevice->fifo_reg = reg_base + ME4600_AO_01_FIFO_REG;
5707                 subdevice->single_reg = reg_base + ME4600_AO_01_SINGLE_REG;
5708                 subdevice->timer_reg = reg_base + ME4600_AO_01_TIMER_REG;
5709                 subdevice->reg_base = reg_base;
5710                 subdevice->bosch_fw = 0;
5711         } else if (ao_idx == 2) {
5712                 subdevice->ctrl_reg = reg_base + ME4600_AO_02_CTRL_REG;
5713                 subdevice->status_reg = reg_base + ME4600_AO_02_STATUS_REG;
5714                 subdevice->fifo_reg = reg_base + ME4600_AO_02_FIFO_REG;
5715                 subdevice->single_reg = reg_base + ME4600_AO_02_SINGLE_REG;
5716                 subdevice->timer_reg = reg_base + ME4600_AO_02_TIMER_REG;
5717                 subdevice->reg_base = reg_base;
5718                 subdevice->bosch_fw = 0;
5719         } else {
5720                 subdevice->ctrl_reg = reg_base + ME4600_AO_03_CTRL_REG;
5721                 subdevice->status_reg = reg_base + ME4600_AO_03_STATUS_REG;
5722                 subdevice->fifo_reg = reg_base + ME4600_AO_03_FIFO_REG;
5723                 subdevice->single_reg = reg_base + ME4600_AO_03_SINGLE_REG;
5724                 subdevice->timer_reg = reg_base + ME4600_AO_03_TIMER_REG;
5725                 subdevice->reg_base = reg_base;
5726                 subdevice->bosch_fw = 0;
5727         }
5728
5729         subdevice->irq_status_reg = reg_base + ME4600_IRQ_STATUS_REG;
5730         subdevice->preload_reg = reg_base + ME4600_AO_LOADSETREG_XX;
5731
5732         /* Register interrupt service routine */
5733         subdevice->irq = irq;
5734
5735         if (request_irq
5736             (subdevice->irq, me4600_ao_isr, IRQF_DISABLED | IRQF_SHARED,
5737              ME4600_NAME, subdevice)) {
5738                 PERROR("Cannot get interrupt line.\n");
5739                 me_subdevice_deinit((me_subdevice_t *) subdevice);
5740                 kfree(subdevice->circ_buf.buf);
5741                 kfree(subdevice);
5742                 return NULL;
5743         }
5744
5745         /* Override base class methods. */
5746         subdevice->base.me_subdevice_destructor = me4600_ao_destructor;
5747         subdevice->base.me_subdevice_io_reset_subdevice =
5748             me4600_ao_io_reset_subdevice;
5749         subdevice->base.me_subdevice_io_single_config =
5750             me4600_ao_io_single_config;
5751         subdevice->base.me_subdevice_io_single_read = me4600_ao_io_single_read;
5752         subdevice->base.me_subdevice_io_single_write =
5753             me4600_ao_io_single_write;
5754         subdevice->base.me_subdevice_io_stream_config =
5755             me4600_ao_io_stream_config;
5756         subdevice->base.me_subdevice_io_stream_new_values =
5757             me4600_ao_io_stream_new_values;
5758         subdevice->base.me_subdevice_io_stream_write =
5759             me4600_ao_io_stream_write;
5760         subdevice->base.me_subdevice_io_stream_start =
5761             me4600_ao_io_stream_start;
5762         subdevice->base.me_subdevice_io_stream_status =
5763             me4600_ao_io_stream_status;
5764         subdevice->base.me_subdevice_io_stream_stop = me4600_ao_io_stream_stop;
5765         subdevice->base.me_subdevice_query_number_channels =
5766             me4600_ao_query_number_channels;
5767         subdevice->base.me_subdevice_query_subdevice_type =
5768             me4600_ao_query_subdevice_type;
5769         subdevice->base.me_subdevice_query_subdevice_caps =
5770             me4600_ao_query_subdevice_caps;
5771         subdevice->base.me_subdevice_query_subdevice_caps_args =
5772             me4600_ao_query_subdevice_caps_args;
5773         subdevice->base.me_subdevice_query_range_by_min_max =
5774             me4600_ao_query_range_by_min_max;
5775         subdevice->base.me_subdevice_query_number_ranges =
5776             me4600_ao_query_number_ranges;
5777         subdevice->base.me_subdevice_query_range_info =
5778             me4600_ao_query_range_info;
5779         subdevice->base.me_subdevice_query_timer = me4600_ao_query_timer;
5780
5781         return subdevice;
5782 }
5783
5784 #endif // BOSCH
5785
5786 /* Common functions
5787 */
5788
5789 static int me4600_ao_query_range_by_min_max(me_subdevice_t *subdevice,
5790                                             int unit,
5791                                             int *min,
5792                                             int *max, int *maxdata, int *range)
5793 {
5794         me4600_ao_subdevice_t *instance;
5795
5796         instance = (me4600_ao_subdevice_t *) subdevice;
5797
5798         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5799
5800         if ((*max - *min) < 0) {
5801                 PERROR("Invalid minimum and maximum values specified.\n");
5802                 return ME_ERRNO_INVALID_MIN_MAX;
5803         }
5804
5805         if ((unit == ME_UNIT_VOLT) || (unit == ME_UNIT_ANY)) {
5806                 if ((*max <= (ME4600_AO_MAX_RANGE + 1000))
5807                     && (*min >= ME4600_AO_MIN_RANGE)) {
5808                         *min = ME4600_AO_MIN_RANGE;
5809                         *max = ME4600_AO_MAX_RANGE;
5810                         *maxdata = ME4600_AO_MAX_DATA;
5811                         *range = 0;
5812                 } else {
5813                         PERROR("No matching range available.\n");
5814                         return ME_ERRNO_NO_RANGE;
5815                 }
5816         } else {
5817                 PERROR("Invalid physical unit specified.\n");
5818                 return ME_ERRNO_INVALID_UNIT;
5819         }
5820
5821         return ME_ERRNO_SUCCESS;
5822 }
5823
5824 static int me4600_ao_query_number_ranges(me_subdevice_t *subdevice,
5825                                          int unit, int *count)
5826 {
5827         me4600_ao_subdevice_t *instance;
5828
5829         instance = (me4600_ao_subdevice_t *) subdevice;
5830
5831         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5832
5833         if ((unit == ME_UNIT_VOLT) || (unit == ME_UNIT_ANY)) {
5834                 *count = 1;
5835         } else {
5836                 *count = 0;
5837         }
5838
5839         return ME_ERRNO_SUCCESS;
5840 }
5841
5842 static int me4600_ao_query_range_info(me_subdevice_t *subdevice,
5843                                       int range,
5844                                       int *unit,
5845                                       int *min, int *max, int *maxdata)
5846 {
5847         me4600_ao_subdevice_t *instance;
5848
5849         instance = (me4600_ao_subdevice_t *) subdevice;
5850
5851         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5852
5853         if (range == 0) {
5854                 *unit = ME_UNIT_VOLT;
5855                 *min = ME4600_AO_MIN_RANGE;
5856                 *max = ME4600_AO_MAX_RANGE;
5857                 *maxdata = ME4600_AO_MAX_DATA;
5858         } else {
5859                 PERROR("Invalid range number specified.\n");
5860                 return ME_ERRNO_INVALID_RANGE;
5861         }
5862
5863         return ME_ERRNO_SUCCESS;
5864 }
5865
5866 static int me4600_ao_query_timer(me_subdevice_t *subdevice,
5867                                  int timer,
5868                                  int *base_frequency,
5869                                  long long *min_ticks, long long *max_ticks)
5870 {
5871         me4600_ao_subdevice_t *instance;
5872
5873         instance = (me4600_ao_subdevice_t *) subdevice;
5874
5875         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5876
5877         if ((timer != ME_TIMER_ACQ_START) && (timer != ME_TIMER_CONV_START)) {
5878                 PERROR("Invalid timer specified.\n");
5879                 return ME_ERRNO_INVALID_TIMER;
5880         }
5881
5882         if (instance->fifo) {   //Streaming device.
5883                 *base_frequency = ME4600_AO_BASE_FREQUENCY;
5884                 if (timer == ME_TIMER_ACQ_START) {
5885                         *min_ticks = ME4600_AO_MIN_ACQ_TICKS;
5886                         *max_ticks = ME4600_AO_MAX_ACQ_TICKS;
5887                 } else if (timer == ME_TIMER_CONV_START) {
5888                         *min_ticks = ME4600_AO_MIN_CHAN_TICKS;
5889                         *max_ticks = ME4600_AO_MAX_CHAN_TICKS;
5890                 }
5891         } else {                //Not streaming device!
5892                 *base_frequency = 0;
5893                 *min_ticks = 0;
5894                 *max_ticks = 0;
5895         }
5896
5897         return ME_ERRNO_SUCCESS;
5898 }
5899
5900 static int me4600_ao_query_number_channels(me_subdevice_t *subdevice,
5901                                            int *number)
5902 {
5903         me4600_ao_subdevice_t *instance;
5904         instance = (me4600_ao_subdevice_t *) subdevice;
5905
5906         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5907
5908         *number = 1;
5909
5910         return ME_ERRNO_SUCCESS;
5911 }
5912
5913 static int me4600_ao_query_subdevice_type(me_subdevice_t *subdevice,
5914                                           int *type, int *subtype)
5915 {
5916         me4600_ao_subdevice_t *instance;
5917
5918         instance = (me4600_ao_subdevice_t *) subdevice;
5919
5920         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5921
5922         *type = ME_TYPE_AO;
5923         *subtype = (instance->fifo) ? ME_SUBTYPE_STREAMING : ME_SUBTYPE_SINGLE;
5924
5925         return ME_ERRNO_SUCCESS;
5926 }
5927
5928 static int me4600_ao_query_subdevice_caps(me_subdevice_t *subdevice, int *caps)
5929 {
5930         me4600_ao_subdevice_t *instance;
5931         instance = (me4600_ao_subdevice_t *) subdevice;
5932
5933         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5934
5935         *caps =
5936             ME_CAPS_AO_TRIG_SYNCHRONOUS | ((instance->fifo) ? ME_CAPS_AO_FIFO :
5937                                            ME_CAPS_NONE);
5938
5939         return ME_ERRNO_SUCCESS;
5940 }
5941
5942 static int me4600_ao_query_subdevice_caps_args(struct me_subdevice *subdevice,
5943                                                int cap, int *args, int count)
5944 {
5945         me4600_ao_subdevice_t *instance;
5946         int err = ME_ERRNO_SUCCESS;
5947
5948         instance = (me4600_ao_subdevice_t *) subdevice;
5949
5950         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5951
5952         if (count != 1) {
5953                 PERROR("Invalid capability argument count.\n");
5954                 return ME_ERRNO_INVALID_CAP_ARG_COUNT;
5955         }
5956
5957         switch (cap) {
5958         case ME_CAP_AI_FIFO_SIZE:
5959                 args[0] = (instance->fifo) ? ME4600_AO_FIFO_COUNT : 0;
5960                 break;
5961
5962         case ME_CAP_AI_BUFFER_SIZE:
5963                 args[0] =
5964                     (instance->circ_buf.buf) ? ME4600_AO_CIRC_BUF_COUNT : 0;
5965                 break;
5966
5967         default:
5968                 PERROR("Invalid capability.\n");
5969                 err = ME_ERRNO_INVALID_CAP;
5970                 args[0] = 0;
5971         }
5972
5973         return err;
5974 }