release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/comedi/drivers/ni_6527.c

   1 /*
   2     comedi/drivers/ni_6527.c
   3     driver for National Instruments PCI-6527
   4
   5     COMEDI - Linux Control and Measurement Device Interface
   6     Copyright (C) 1999,2002,2003 David A. Schleef <ds@schleef.org>
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23 /*
  24 Driver: ni_6527
  25 Description: National Instruments 6527
  26 Author: ds
  27 Status: works
  28 Devices: [National Instruments] PCI-6527 (ni6527), PXI-6527
  29 Updated: Sat, 25 Jan 2003 13:24:40 -0800
  30
  31
  32 */
  33
  34 /*
  35    Manuals (available from ftp://ftp.natinst.com/support/manuals)
  36
  37         370106b.pdf     6527 Register Level Programmer Manual
  38
  39  */
  40
  41 #define DEBUG 1
  42 #define DEBUG_FLAGS
  43
  44 #include <linux/interrupt.h>
  45 #include "../comedidev.h"
  46
  47 #include "mite.h"
  48
  49 #define NI6527_DIO_SIZE 4096
  50 #define NI6527_MITE_SIZE 4096
  51
  52 #define Port_Register(x)                        (0x00+(x))
  53 #define ID_Register                             0x06
  54
  55 #define Clear_Register                          0x07
  56 #define ClrEdge                         0x08
  57 #define ClrOverflow                     0x04
  58 #define ClrFilter                       0x02
  59 #define ClrInterval                     0x01
  60
  61 #define Filter_Interval(x)                      (0x08+(x))
  62 #define Filter_Enable(x)                        (0x0c+(x))
  63
  64 #define Change_Status                           0x14
  65 #define MasterInterruptStatus           0x04
  66 #define Overflow                        0x02
  67 #define EdgeStatus                      0x01
  68
  69 #define Master_Interrupt_Control                0x15
  70 #define FallingEdgeIntEnable            0x10
  71 #define RisingEdgeIntEnable             0x08
  72 #define MasterInterruptEnable           0x04
  73 #define OverflowIntEnable               0x02
  74 #define EdgeIntEnable                   0x01
  75
  76 #define Rising_Edge_Detection_Enable(x)         (0x018+(x))
  77 #define Falling_Edge_Detection_Enable(x)        (0x020+(x))
  78
  79 static int ni6527_attach(struct comedi_device *dev,
  80                          struct comedi_devconfig *it);
  81 static int ni6527_detach(struct comedi_device *dev);
  82 static struct comedi_driver driver_ni6527 = {
  83         .driver_name = "ni6527",
  84         .module = THIS_MODULE,
  85         .attach = ni6527_attach,
  86         .detach = ni6527_detach,
  87 };
  88
  89 struct ni6527_board {
  90
  91         int dev_id;
  92         const char *name;
  93 };
  94
  95 static const struct ni6527_board ni6527_boards[] = {
  96         {
  97          .dev_id = 0x2b20,
  98          .name = "pci-6527",
  99          },
 100         {
 101          .dev_id = 0x2b10,
 102          .name = "pxi-6527",
 103          },
 104 };
 105
 106 #define n_ni6527_boards ARRAY_SIZE(ni6527_boards)
 107 #define this_board ((const struct ni6527_board *)dev->board_ptr)
 108
 109 static DEFINE_PCI_DEVICE_TABLE(ni6527_pci_table) = {
 110         {PCI_DEVICE(PCI_VENDOR_ID_NI, 0x2b10)},
 111         {PCI_DEVICE(PCI_VENDOR_ID_NI, 0x2b20)},
 112         {0}
 113 };
 114
 115 MODULE_DEVICE_TABLE(pci, ni6527_pci_table);
 116
 117 struct ni6527_private {
 118         struct mite_struct *mite;
 119         unsigned int filter_interval;
 120         unsigned int filter_enable;
 121 };
 122
 123 #define devpriv ((struct ni6527_private *)dev->private)
 124
 125 static int ni6527_find_device(struct comedi_device *dev, int bus, int slot);
 126
 127 static int ni6527_di_insn_config(struct comedi_device *dev,
 128                                  struct comedi_subdevice *s,
 129                                  struct comedi_insn *insn, unsigned int *data)
 130 {
 131         int chan = CR_CHAN(insn->chanspec);
 132         unsigned int interval;
 133
 134         if (insn->n != 2)
 135                 return -EINVAL;
 136
 137         if (data[0] != INSN_CONFIG_FILTER)
 138                 return -EINVAL;
 139
 140         if (data[1]) {
 141                 interval = (data[1] + 100) / 200;
 142                 data[1] = interval * 200;
 143
 144                 if (interval != devpriv->filter_interval) {
 145                         writeb(interval & 0xff,
 146                                devpriv->mite->daq_io_addr + Filter_Interval(0));
 147                         writeb((interval >> 8) & 0xff,
 148                                devpriv->mite->daq_io_addr + Filter_Interval(1));
 149                         writeb((interval >> 16) & 0x0f,
 150                                devpriv->mite->daq_io_addr + Filter_Interval(2));
 151
 152                         writeb(ClrInterval,
 153                                devpriv->mite->daq_io_addr + Clear_Register);
 154
 155                         devpriv->filter_interval = interval;
 156                 }
 157
 158                 devpriv->filter_enable |= 1 << chan;
 159         } else {
 160                 devpriv->filter_enable &= ~(1 << chan);
 161         }
 162
 163         writeb(devpriv->filter_enable,
 164                devpriv->mite->daq_io_addr + Filter_Enable(0));
 165         writeb(devpriv->filter_enable >> 8,
 166                devpriv->mite->daq_io_addr + Filter_Enable(1));
 167         writeb(devpriv->filter_enable >> 16,
 168                devpriv->mite->daq_io_addr + Filter_Enable(2));
 169
 170         return 2;
 171 }
 172
 173 static int ni6527_di_insn_bits(struct comedi_device *dev,
 174                                struct comedi_subdevice *s,
 175                                struct comedi_insn *insn, unsigned int *data)
 176 {
 177         if (insn->n != 2)
 178                 return -EINVAL;
 179
 180         data[1] = readb(devpriv->mite->daq_io_addr + Port_Register(0));
 181         data[1] |= readb(devpriv->mite->daq_io_addr + Port_Register(1)) << 8;
 182         data[1] |= readb(devpriv->mite->daq_io_addr + Port_Register(2)) << 16;
 183
 184         return 2;
 185 }
 186
 187 static int ni6527_do_insn_bits(struct comedi_device *dev,
 188                                struct comedi_subdevice *s,
 189                                struct comedi_insn *insn, unsigned int *data)
 190 {
 191         if (insn->n != 2)
 192                 return -EINVAL;
 193         if (data[0]) {
 194                 s->state &= ~data[0];
 195                 s->state |= (data[0] & data[1]);
 196
 197                 /* The open relay state on the board cooresponds to 1,
 198                  * but in Comedi, it is represented by 0. */
 199                 if (data[0] & 0x0000ff) {
 200                         writeb((s->state ^ 0xff),
 201                                devpriv->mite->daq_io_addr + Port_Register(3));
 202                 }
 203                 if (data[0] & 0x00ff00) {
 204                         writeb((s->state >> 8) ^ 0xff,
 205                                devpriv->mite->daq_io_addr + Port_Register(4));
 206                 }
 207                 if (data[0] & 0xff0000) {
 208                         writeb((s->state >> 16) ^ 0xff,
 209                                devpriv->mite->daq_io_addr + Port_Register(5));
 210                 }
 211         }
 212         data[1] = s->state;
 213
 214         return 2;
 215 }
 216
 217 static irqreturn_t ni6527_interrupt(int irq, void *d)
 218 {
 219         struct comedi_device *dev = d;
 220         struct comedi_subdevice *s = dev->subdevices + 2;
 221         unsigned int status;
 222
 223         status = readb(devpriv->mite->daq_io_addr + Change_Status);
 224         if ((status & MasterInterruptStatus) == 0)
 225                 return IRQ_NONE;
 226         if ((status & EdgeStatus) == 0)
 227                 return IRQ_NONE;
 228
 229         writeb(ClrEdge | ClrOverflow,
 230                devpriv->mite->daq_io_addr + Clear_Register);
 231
 232         comedi_buf_put(s->async, 0);
 233         s->async->events |= COMEDI_CB_EOS;
 234         comedi_event(dev, s);
 235         return IRQ_HANDLED;
 236 }
 237
 238 static int ni6527_intr_cmdtest(struct comedi_device *dev,
 239                                struct comedi_subdevice *s,
 240                                struct comedi_cmd *cmd)
 241 {
 242         int err = 0;
 243         int tmp;
 244
 245         /* step 1: make sure trigger sources are trivially valid */
 246
 247         tmp = cmd->start_src;
 248         cmd->start_src &= TRIG_NOW;
 249         if (!cmd->start_src || tmp != cmd->start_src)
 250                 err++;
 251
 252         tmp = cmd->scan_begin_src;
 253         cmd->scan_begin_src &= TRIG_OTHER;
 254         if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
 255                 err++;
 256
 257         tmp = cmd->convert_src;
 258         cmd->convert_src &= TRIG_FOLLOW;
 259         if (!cmd->convert_src || tmp != cmd->convert_src)
 260                 err++;
 261
 262         tmp = cmd->scan_end_src;
 263         cmd->scan_end_src &= TRIG_COUNT;
 264         if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
 265                 err++;
 266
 267         tmp = cmd->stop_src;
 268         cmd->stop_src &= TRIG_COUNT;
 269         if (!cmd->stop_src || tmp != cmd->stop_src)
 270                 err++;
 271
 272         if (err)
 273                 return 1;
 274
 275         /* step 2: make sure trigger sources are unique and */
 276         /*         are mutually compatible */
 277
 278         if (err)
 279                 return 2;
 280
 281         /* step 3: make sure arguments are trivially compatible */
 282
 283         if (cmd->start_arg != 0) {
 284                 cmd->start_arg = 0;
 285                 err++;
 286         }
 287         if (cmd->scan_begin_arg != 0) {
 288                 cmd->scan_begin_arg = 0;
 289                 err++;
 290         }
 291         if (cmd->convert_arg != 0) {
 292                 cmd->convert_arg = 0;
 293                 err++;
 294         }
 295
 296         if (cmd->scan_end_arg != 1) {
 297                 cmd->scan_end_arg = 1;
 298                 err++;
 299         }
 300         if (cmd->stop_arg != 0) {
 301                 cmd->stop_arg = 0;
 302                 err++;
 303         }
 304
 305         if (err)
 306                 return 3;
 307
 308         /* step 4: fix up any arguments */
 309
 310         if (err)
 311                 return 4;
 312
 313         return 0;
 314 }
 315
 316 static int ni6527_intr_cmd(struct comedi_device *dev,
 317                            struct comedi_subdevice *s)
 318 {
 319         /* struct comedi_cmd *cmd = &s->async->cmd; */
 320
 321         writeb(ClrEdge | ClrOverflow,
 322                devpriv->mite->daq_io_addr + Clear_Register);
 323         writeb(FallingEdgeIntEnable | RisingEdgeIntEnable |
 324                MasterInterruptEnable | EdgeIntEnable,
 325                devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 326
 327         return 0;
 328 }
 329
 330 static int ni6527_intr_cancel(struct comedi_device *dev,
 331                               struct comedi_subdevice *s)
 332 {
 333         writeb(0x00, devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 334
 335         return 0;
 336 }
 337
 338 static int ni6527_intr_insn_bits(struct comedi_device *dev,
 339                                  struct comedi_subdevice *s,
 340                                  struct comedi_insn *insn, unsigned int *data)
 341 {
 342         if (insn->n < 1)
 343                 return -EINVAL;
 344
 345         data[1] = 0;
 346         return 2;
 347 }
 348
 349 static int ni6527_intr_insn_config(struct comedi_device *dev,
 350                                    struct comedi_subdevice *s,
 351                                    struct comedi_insn *insn, unsigned int *data)
 352 {
 353         if (insn->n < 1)
 354                 return -EINVAL;
 355         if (data[0] != INSN_CONFIG_CHANGE_NOTIFY)
 356                 return -EINVAL;
 357
 358         writeb(data[1],
 359                devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(0));
 360         writeb(data[1] >> 8,
 361                devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(1));
 362         writeb(data[1] >> 16,
 363                devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(2));
 364
 365         writeb(data[2],
 366                devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(0));
 367         writeb(data[2] >> 8,
 368                devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(1));
 369         writeb(data[2] >> 16,
 370                devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(2));
 371
 372         return 2;
 373 }
 374
 375 static int ni6527_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 376 {
 377         struct comedi_subdevice *s;
 378         int ret;
 379
 380         printk(KERN_INFO "comedi%d: ni6527\n", dev->minor);
 381
 382         ret = alloc_private(dev, sizeof(struct ni6527_private));
 383         if (ret < 0)
 384                 return ret;
 385
 386         ret = ni6527_find_device(dev, it->options[0], it->options[1]);
 387         if (ret < 0)
 388                 return ret;
 389
 390         ret = mite_setup(devpriv->mite);
 391         if (ret < 0) {
 392                 printk(KERN_ERR "comedi: error setting up mite\n");
 393                 return ret;
 394         }
 395
 396         dev->board_name = this_board->name;
 397         printk(KERN_INFO "comedi board: %s, ID=0x%02x\n", dev->board_name,
 398                 readb(devpriv->mite->daq_io_addr + ID_Register));
 399
 400         ret = alloc_subdevices(dev, 3);
 401         if (ret < 0)
 402                 return ret;
 403
 404         s = dev->subdevices + 0;
 405         s->type = COMEDI_SUBD_DI;
 406         s->subdev_flags = SDF_READABLE;
 407         s->n_chan = 24;
 408         s->range_table = &range_digital;
 409         s->maxdata = 1;
 410         s->insn_config = ni6527_di_insn_config;
 411         s->insn_bits = ni6527_di_insn_bits;
 412
 413         s = dev->subdevices + 1;
 414         s->type = COMEDI_SUBD_DO;
 415         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 416         s->n_chan = 24;
 417         s->range_table = &range_unknown;
 418         s->maxdata = 1;
 419         s->insn_bits = ni6527_do_insn_bits;
 420
 421         s = dev->subdevices + 2;
 422         dev->read_subdev = s;
 423         s->type = COMEDI_SUBD_DI;
 424         s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
 425         s->n_chan = 1;
 426         s->range_table = &range_unknown;
 427         s->maxdata = 1;
 428         s->do_cmdtest = ni6527_intr_cmdtest;
 429         s->do_cmd = ni6527_intr_cmd;
 430         s->cancel = ni6527_intr_cancel;
 431         s->insn_bits = ni6527_intr_insn_bits;
 432         s->insn_config = ni6527_intr_insn_config;
 433
 434         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(0));
 435         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(1));
 436         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(2));
 437
 438         writeb(ClrEdge | ClrOverflow | ClrFilter | ClrInterval,
 439                devpriv->mite->daq_io_addr + Clear_Register);
 440         writeb(0x00, devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 441
 442         ret = request_irq(mite_irq(devpriv->mite), ni6527_interrupt,
 443                           IRQF_SHARED, "ni6527", dev);
 444         if (ret < 0)
 445                 printk(KERN_WARNING "comedi i6527 irq not available\n");
 446         else
 447                 dev->irq = mite_irq(devpriv->mite);
 448
 449         return 0;
 450 }
 451
 452 static int ni6527_detach(struct comedi_device *dev)
 453 {
 454         if (devpriv && devpriv->mite && devpriv->mite->daq_io_addr)
 455                 writeb(0x00,
 456                        devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 457
 458         if (dev->irq)
 459                 free_irq(dev->irq, dev);
 460
 461         if (devpriv && devpriv->mite)
 462                 mite_unsetup(devpriv->mite);
 463
 464         return 0;
 465 }
 466
 467 static int ni6527_find_device(struct comedi_device *dev, int bus, int slot)
 468 {
 469         struct mite_struct *mite;
 470         int i;
 471
 472         for (mite = mite_devices; mite; mite = mite->next) {
 473                 if (mite->used)
 474                         continue;
 475                 if (bus || slot) {
 476                         if (bus != mite->pcidev->bus->number ||
 477                             slot != PCI_SLOT(mite->pcidev->devfn))
 478                                 continue;
 479                 }
 480                 for (i = 0; i < n_ni6527_boards; i++) {
 481                         if (mite_device_id(mite) == ni6527_boards[i].dev_id) {
 482                                 dev->board_ptr = ni6527_boards + i;
 483                                 devpriv->mite = mite;
 484                                 return 0;
 485                         }
 486                 }
 487         }
 488         printk(KERN_ERR "comedi 6527: no device found\n");
 489         mite_list_devices();
 490         return -EIO;
 491 }
 492
 493 static int __devinit driver_ni6527_pci_probe(struct pci_dev *dev,
 494                                              const struct pci_device_id *ent)
 495 {
 496         return comedi_pci_auto_config(dev, driver_ni6527.driver_name);
 497 }
 498
 499 static void __devexit driver_ni6527_pci_remove(struct pci_dev *dev)
 500 {
 501         comedi_pci_auto_unconfig(dev);
 502 }
 503
 504 static struct pci_driver driver_ni6527_pci_driver = {
 505         .id_table = ni6527_pci_table,
 506         .probe = &driver_ni6527_pci_probe,
 507         .remove = __devexit_p(&driver_ni6527_pci_remove)
 508 };
 509
 510 static int __init driver_ni6527_init_module(void)
 511 {
 512         int retval;
 513
 514         retval = comedi_driver_register(&driver_ni6527);
 515         if (retval < 0)
 516                 return retval;
 517
 518         driver_ni6527_pci_driver.name = (char *)driver_ni6527.driver_name;
 519         return pci_register_driver(&driver_ni6527_pci_driver);
 520 }
 521
 522 static void __exit driver_ni6527_cleanup_module(void)
 523 {
 524         pci_unregister_driver(&driver_ni6527_pci_driver);
 525         comedi_driver_unregister(&driver_ni6527);
 526 }
 527
 528 module_init(driver_ni6527_init_module);
 529 module_exit(driver_ni6527_cleanup_module);