release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/usb/misc/ftdi-elan.c

   1 /*
   2 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
   3 *
   4 * Copyright(C) 2006 Elan Digital Systems Limited
   5 * http://www.elandigitalsystems.com
   6 *
   7 * Author and Maintainer - Tony Olech - Elan Digital Systems
   8 * tony.olech@elandigitalsystems.com
   9 *
  10 * This program is free software;you can redistribute it and/or
  11 * modify it under the terms of the GNU General Public License as
  12 * published by the Free Software Foundation, version 2.
  13 *
  14 *
  15 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
  16 * based on various USB client drivers in the 2.6.15 linux kernel
  17 * with constant reference to the 3rd Edition of Linux Device Drivers
  18 * published by O'Reilly
  19 *
  20 * The U132 adapter is a USB to CardBus adapter specifically designed
  21 * for PC cards that contain an OHCI host controller. Typical PC cards
  22 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
  23 *
  24 * The U132 adapter will *NOT *work with PC cards that do not contain
  25 * an OHCI controller. A simple way to test whether a PC card has an
  26 * OHCI controller as an interface is to insert the PC card directly
  27 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
  28 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
  29 * then there is a good chance that the U132 adapter will support the
  30 * PC card.(you also need the specific client driver for the PC card)
  31 *
  32 * Please inform the Author and Maintainer about any PC cards that
  33 * contain OHCI Host Controller and work when directly connected to
  34 * an embedded CardBus slot but do not work when they are connected
  35 * via an ELAN U132 adapter.
  36 *
  37 */
  38 #include <linux/kernel.h>
  39 #include <linux/errno.h>
  40 #include <linux/init.h>
  41 #include <linux/list.h>
  42 #include <linux/ioctl.h>
  43 #include <linux/pci_ids.h>
  44 #include <linux/slab.h>
  45 #include <linux/module.h>
  46 #include <linux/kref.h>
  47 #include <linux/mutex.h>
  48 #include <asm/uaccess.h>
  49 #include <linux/usb.h>
  50 #include <linux/workqueue.h>
  51 #include <linux/platform_device.h>
  52 MODULE_AUTHOR("Tony Olech");
  53 MODULE_DESCRIPTION("FTDI ELAN driver");
  54 MODULE_LICENSE("GPL");
  55 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
  56 static int distrust_firmware = 1;
  57 module_param(distrust_firmware, bool, 0);
  58 MODULE_PARM_DESC(distrust_firmware, "true to distrust firmware power/overcurren"
  59         "t setup");
  60 extern struct platform_driver u132_platform_driver;
  61 static struct workqueue_struct *status_queue;
  62 static struct workqueue_struct *command_queue;
  63 static struct workqueue_struct *respond_queue;
  64 /*
  65 * ftdi_module_lock exists to protect access to global variables
  66 *
  67 */
  68 static struct mutex ftdi_module_lock;
  69 static int ftdi_instances = 0;
  70 static struct list_head ftdi_static_list;
  71 /*
  72 * end of the global variables protected by ftdi_module_lock
  73 */
  74 #include "usb_u132.h"
  75 #include <asm/io.h>
  76 #include <linux/usb/hcd.h>
  77
  78
  79 #include "../host/ohci.h"
  80 /* Define these values to match your devices*/
  81 #define USB_FTDI_ELAN_VENDOR_ID 0x0403
  82 #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
  83 /* table of devices that work with this driver*/
  84 static const struct usb_device_id ftdi_elan_table[] = {
  85         {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
  86         { /* Terminating entry */ }
  87 };
  88
  89 MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
  90 /* only the jtag(firmware upgrade device) interface requires
  91 * a device file and corresponding minor number, but the
  92 * interface is created unconditionally - I suppose it could
  93 * be configured or not according to a module parameter.
  94 * But since we(now) require one interface per device,
  95 * and since it unlikely that a normal installation would
  96 * require more than a couple of elan-ftdi devices, 8 seems
  97 * like a reasonable limit to have here, and if someone
  98 * really requires more than 8 devices, then they can frig the
  99 * code and recompile
 100 */
 101 #define USB_FTDI_ELAN_MINOR_BASE 192
 102 #define COMMAND_BITS 5
 103 #define COMMAND_SIZE (1<<COMMAND_BITS)
 104 #define COMMAND_MASK (COMMAND_SIZE-1)
 105 struct u132_command {
 106         u8 header;
 107         u16 length;
 108         u8 address;
 109         u8 width;
 110         u32 value;
 111         int follows;
 112         void *buffer;
 113 };
 114 #define RESPOND_BITS 5
 115 #define RESPOND_SIZE (1<<RESPOND_BITS)
 116 #define RESPOND_MASK (RESPOND_SIZE-1)
 117 struct u132_respond {
 118         u8 header;
 119         u8 address;
 120         u32 *value;
 121         int *result;
 122         struct completion wait_completion;
 123 };
 124 struct u132_target {
 125         void *endp;
 126         struct urb *urb;
 127         int toggle_bits;
 128         int error_count;
 129         int condition_code;
 130         int repeat_number;
 131         int halted;
 132         int skipped;
 133         int actual;
 134         int non_null;
 135         int active;
 136         int abandoning;
 137         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
 138                 int toggle_bits, int error_count, int condition_code,
 139                 int repeat_number, int halted, int skipped, int actual,
 140                 int non_null);
 141 };
 142 /* Structure to hold all of our device specific stuff*/
 143 struct usb_ftdi {
 144         struct list_head ftdi_list;
 145         struct mutex u132_lock;
 146         int command_next;
 147         int command_head;
 148         struct u132_command command[COMMAND_SIZE];
 149         int respond_next;
 150         int respond_head;
 151         struct u132_respond respond[RESPOND_SIZE];
 152         struct u132_target target[4];
 153         char device_name[16];
 154         unsigned synchronized:1;
 155         unsigned enumerated:1;
 156         unsigned registered:1;
 157         unsigned initialized:1;
 158         unsigned card_ejected:1;
 159         int function;
 160         int sequence_num;
 161         int disconnected;
 162         int gone_away;
 163         int stuck_status;
 164         int status_queue_delay;
 165         struct semaphore sw_lock;
 166         struct usb_device *udev;
 167         struct usb_interface *interface;
 168         struct usb_class_driver *class;
 169         struct delayed_work status_work;
 170         struct delayed_work command_work;
 171         struct delayed_work respond_work;
 172         struct u132_platform_data platform_data;
 173         struct resource resources[0];
 174         struct platform_device platform_dev;
 175         unsigned char *bulk_in_buffer;
 176         size_t bulk_in_size;
 177         size_t bulk_in_last;
 178         size_t bulk_in_left;
 179         __u8 bulk_in_endpointAddr;
 180         __u8 bulk_out_endpointAddr;
 181         struct kref kref;
 182         u32 controlreg;
 183         u8 response[4 + 1024];
 184         int expected;
 185         int recieved;
 186         int ed_found;
 187 };
 188 #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
 189 #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
 190         platform_dev)
 191 static struct usb_driver ftdi_elan_driver;
 192 static void ftdi_elan_delete(struct kref *kref)
 193 {
 194         struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
 195         dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
 196         usb_put_dev(ftdi->udev);
 197         ftdi->disconnected += 1;
 198         mutex_lock(&ftdi_module_lock);
 199         list_del_init(&ftdi->ftdi_list);
 200         ftdi_instances -= 1;
 201         mutex_unlock(&ftdi_module_lock);
 202         kfree(ftdi->bulk_in_buffer);
 203         ftdi->bulk_in_buffer = NULL;
 204 }
 205
 206 static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
 207 {
 208         kref_put(&ftdi->kref, ftdi_elan_delete);
 209 }
 210
 211 static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
 212 {
 213         kref_get(&ftdi->kref);
 214 }
 215
 216 static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
 217 {
 218         kref_init(&ftdi->kref);
 219 }
 220
 221 static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 222 {
 223         if (!queue_delayed_work(status_queue, &ftdi->status_work, delta))
 224                 kref_put(&ftdi->kref, ftdi_elan_delete);
 225 }
 226
 227 static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 228 {
 229         if (queue_delayed_work(status_queue, &ftdi->status_work, delta))
 230                 kref_get(&ftdi->kref);
 231 }
 232
 233 static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
 234 {
 235         if (cancel_delayed_work(&ftdi->status_work))
 236                 kref_put(&ftdi->kref, ftdi_elan_delete);
 237 }
 238
 239 static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 240 {
 241         if (!queue_delayed_work(command_queue, &ftdi->command_work, delta))
 242                 kref_put(&ftdi->kref, ftdi_elan_delete);
 243 }
 244
 245 static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 246 {
 247         if (queue_delayed_work(command_queue, &ftdi->command_work, delta))
 248                 kref_get(&ftdi->kref);
 249 }
 250
 251 static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
 252 {
 253         if (cancel_delayed_work(&ftdi->command_work))
 254                 kref_put(&ftdi->kref, ftdi_elan_delete);
 255 }
 256
 257 static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
 258         unsigned int delta)
 259 {
 260         if (!queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
 261                 kref_put(&ftdi->kref, ftdi_elan_delete);
 262 }
 263
 264 static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 265 {
 266         if (queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
 267                 kref_get(&ftdi->kref);
 268 }
 269
 270 static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
 271 {
 272         if (cancel_delayed_work(&ftdi->respond_work))
 273                 kref_put(&ftdi->kref, ftdi_elan_delete);
 274 }
 275
 276 void ftdi_elan_gone_away(struct platform_device *pdev)
 277 {
 278         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
 279         ftdi->gone_away += 1;
 280         ftdi_elan_put_kref(ftdi);
 281 }
 282
 283
 284 EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
 285 static void ftdi_release_platform_dev(struct device *dev)
 286 {
 287         dev->parent = NULL;
 288 }
 289
 290 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 291         struct u132_target *target, u8 *buffer, int length);
 292 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
 293 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
 294 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
 295 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
 296 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
 297 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
 298 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
 299 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
 300 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
 301 static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
 302 {
 303         int result;
 304         if (ftdi->platform_dev.dev.parent)
 305                 return -EBUSY;
 306         ftdi_elan_get_kref(ftdi);
 307         ftdi->platform_data.potpg = 100;
 308         ftdi->platform_data.reset = NULL;
 309         ftdi->platform_dev.id = ftdi->sequence_num;
 310         ftdi->platform_dev.resource = ftdi->resources;
 311         ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
 312         ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
 313         ftdi->platform_dev.dev.parent = NULL;
 314         ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
 315         ftdi->platform_dev.dev.dma_mask = NULL;
 316         snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
 317         ftdi->platform_dev.name = ftdi->device_name;
 318         dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
 319         request_module("u132_hcd");
 320         dev_info(&ftdi->udev->dev, "registering '%s'\n",
 321                 ftdi->platform_dev.name);
 322         result = platform_device_register(&ftdi->platform_dev);
 323         return result;
 324 }
 325
 326 static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
 327 {
 328         mutex_lock(&ftdi->u132_lock);
 329         while (ftdi->respond_next > ftdi->respond_head) {
 330                 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
 331                         ftdi->respond_head++];
 332                 *respond->result = -ESHUTDOWN;
 333                 *respond->value = 0;
 334                 complete(&respond->wait_completion);
 335         } mutex_unlock(&ftdi->u132_lock);
 336 }
 337
 338 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
 339 {
 340         int ed_number = 4;
 341         mutex_lock(&ftdi->u132_lock);
 342         while (ed_number-- > 0) {
 343                 struct u132_target *target = &ftdi->target[ed_number];
 344                 if (target->active == 1) {
 345                         target->condition_code = TD_DEVNOTRESP;
 346                         mutex_unlock(&ftdi->u132_lock);
 347                         ftdi_elan_do_callback(ftdi, target, NULL, 0);
 348                         mutex_lock(&ftdi->u132_lock);
 349                 }
 350         }
 351         ftdi->recieved = 0;
 352         ftdi->expected = 4;
 353         ftdi->ed_found = 0;
 354         mutex_unlock(&ftdi->u132_lock);
 355 }
 356
 357 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
 358 {
 359         int ed_number = 4;
 360         mutex_lock(&ftdi->u132_lock);
 361         while (ed_number-- > 0) {
 362                 struct u132_target *target = &ftdi->target[ed_number];
 363                 target->abandoning = 1;
 364               wait_1:if (target->active == 1) {
 365                         int command_size = ftdi->command_next -
 366                                 ftdi->command_head;
 367                         if (command_size < COMMAND_SIZE) {
 368                                 struct u132_command *command = &ftdi->command[
 369                                         COMMAND_MASK & ftdi->command_next];
 370                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 371                                 command->length = 0x00;
 372                                 command->address = 0x00;
 373                                 command->width = 0x00;
 374                                 command->follows = 0;
 375                                 command->value = 0;
 376                                 command->buffer = &command->value;
 377                                 ftdi->command_next += 1;
 378                                 ftdi_elan_kick_command_queue(ftdi);
 379                         } else {
 380                                 mutex_unlock(&ftdi->u132_lock);
 381                                 msleep(100);
 382                                 mutex_lock(&ftdi->u132_lock);
 383                                 goto wait_1;
 384                         }
 385                 }
 386               wait_2:if (target->active == 1) {
 387                         int command_size = ftdi->command_next -
 388                                 ftdi->command_head;
 389                         if (command_size < COMMAND_SIZE) {
 390                                 struct u132_command *command = &ftdi->command[
 391                                         COMMAND_MASK & ftdi->command_next];
 392                                 command->header = 0x90 | (ed_number << 5);
 393                                 command->length = 0x00;
 394                                 command->address = 0x00;
 395                                 command->width = 0x00;
 396                                 command->follows = 0;
 397                                 command->value = 0;
 398                                 command->buffer = &command->value;
 399                                 ftdi->command_next += 1;
 400                                 ftdi_elan_kick_command_queue(ftdi);
 401                         } else {
 402                                 mutex_unlock(&ftdi->u132_lock);
 403                                 msleep(100);
 404                                 mutex_lock(&ftdi->u132_lock);
 405                                 goto wait_2;
 406                         }
 407                 }
 408         }
 409         ftdi->recieved = 0;
 410         ftdi->expected = 4;
 411         ftdi->ed_found = 0;
 412         mutex_unlock(&ftdi->u132_lock);
 413 }
 414
 415 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
 416 {
 417         int ed_number = 4;
 418         mutex_lock(&ftdi->u132_lock);
 419         while (ed_number-- > 0) {
 420                 struct u132_target *target = &ftdi->target[ed_number];
 421                 target->abandoning = 1;
 422               wait:if (target->active == 1) {
 423                         int command_size = ftdi->command_next -
 424                                 ftdi->command_head;
 425                         if (command_size < COMMAND_SIZE) {
 426                                 struct u132_command *command = &ftdi->command[
 427                                         COMMAND_MASK & ftdi->command_next];
 428                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 429                                 command->length = 0x00;
 430                                 command->address = 0x00;
 431                                 command->width = 0x00;
 432                                 command->follows = 0;
 433                                 command->value = 0;
 434                                 command->buffer = &command->value;
 435                                 ftdi->command_next += 1;
 436                                 ftdi_elan_kick_command_queue(ftdi);
 437                         } else {
 438                                 mutex_unlock(&ftdi->u132_lock);
 439                                 msleep(100);
 440                                 mutex_lock(&ftdi->u132_lock);
 441                                 goto wait;
 442                         }
 443                 }
 444         }
 445         ftdi->recieved = 0;
 446         ftdi->expected = 4;
 447         ftdi->ed_found = 0;
 448         mutex_unlock(&ftdi->u132_lock);
 449 }
 450
 451 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
 452 {
 453         ftdi_command_queue_work(ftdi, 0);
 454         return;
 455 }
 456
 457 static void ftdi_elan_command_work(struct work_struct *work)
 458 {
 459         struct usb_ftdi *ftdi =
 460                 container_of(work, struct usb_ftdi, command_work.work);
 461
 462         if (ftdi->disconnected > 0) {
 463                 ftdi_elan_put_kref(ftdi);
 464                 return;
 465         } else {
 466                 int retval = ftdi_elan_command_engine(ftdi);
 467                 if (retval == -ESHUTDOWN) {
 468                         ftdi->disconnected += 1;
 469                 } else if (retval == -ENODEV) {
 470                         ftdi->disconnected += 1;
 471                 } else if (retval)
 472                         dev_err(&ftdi->udev->dev, "command error %d\n", retval);
 473                 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
 474                 return;
 475         }
 476 }
 477
 478 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
 479 {
 480         ftdi_respond_queue_work(ftdi, 0);
 481         return;
 482 }
 483
 484 static void ftdi_elan_respond_work(struct work_struct *work)
 485 {
 486         struct usb_ftdi *ftdi =
 487                 container_of(work, struct usb_ftdi, respond_work.work);
 488         if (ftdi->disconnected > 0) {
 489                 ftdi_elan_put_kref(ftdi);
 490                 return;
 491         } else {
 492                 int retval = ftdi_elan_respond_engine(ftdi);
 493                 if (retval == 0) {
 494                 } else if (retval == -ESHUTDOWN) {
 495                         ftdi->disconnected += 1;
 496                 } else if (retval == -ENODEV) {
 497                         ftdi->disconnected += 1;
 498                 } else if (retval == -EILSEQ) {
 499                         ftdi->disconnected += 1;
 500                 } else {
 501                         ftdi->disconnected += 1;
 502                         dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
 503                 }
 504                 if (ftdi->disconnected > 0) {
 505                         ftdi_elan_abandon_completions(ftdi);
 506                         ftdi_elan_abandon_targets(ftdi);
 507                 }
 508                 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
 509                 return;
 510         }
 511 }
 512
 513
 514 /*
 515 * the sw_lock is initially held and will be freed
 516 * after the FTDI has been synchronized
 517 *
 518 */
 519 static void ftdi_elan_status_work(struct work_struct *work)
 520 {
 521         struct usb_ftdi *ftdi =
 522                 container_of(work, struct usb_ftdi, status_work.work);
 523         int work_delay_in_msec = 0;
 524         if (ftdi->disconnected > 0) {
 525                 ftdi_elan_put_kref(ftdi);
 526                 return;
 527         } else if (ftdi->synchronized == 0) {
 528                 down(&ftdi->sw_lock);
 529                 if (ftdi_elan_synchronize(ftdi) == 0) {
 530                         ftdi->synchronized = 1;
 531                         ftdi_command_queue_work(ftdi, 1);
 532                         ftdi_respond_queue_work(ftdi, 1);
 533                         up(&ftdi->sw_lock);
 534                         work_delay_in_msec = 100;
 535                 } else {
 536                         dev_err(&ftdi->udev->dev, "synchronize failed\n");
 537                         up(&ftdi->sw_lock);
 538                         work_delay_in_msec = 10 *1000;
 539                 }
 540         } else if (ftdi->stuck_status > 0) {
 541                 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
 542                         ftdi->stuck_status = 0;
 543                         ftdi->synchronized = 0;
 544                 } else if ((ftdi->stuck_status++ % 60) == 1) {
 545                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
 546                                 "- please remove\n");
 547                 } else
 548                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
 549                                 "- checked %d times\n", ftdi->stuck_status);
 550                 work_delay_in_msec = 100;
 551         } else if (ftdi->enumerated == 0) {
 552                 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
 553                         ftdi->enumerated = 1;
 554                         work_delay_in_msec = 250;
 555                 } else
 556                         work_delay_in_msec = 1000;
 557         } else if (ftdi->initialized == 0) {
 558                 if (ftdi_elan_setupOHCI(ftdi) == 0) {
 559                         ftdi->initialized = 1;
 560                         work_delay_in_msec = 500;
 561                 } else {
 562                         dev_err(&ftdi->udev->dev, "initialized failed - trying "
 563                                 "again in 10 seconds\n");
 564                         work_delay_in_msec = 1 *1000;
 565                 }
 566         } else if (ftdi->registered == 0) {
 567                 work_delay_in_msec = 10;
 568                 if (ftdi_elan_hcd_init(ftdi) == 0) {
 569                         ftdi->registered = 1;
 570                 } else
 571                         dev_err(&ftdi->udev->dev, "register failed\n");
 572                 work_delay_in_msec = 250;
 573         } else {
 574                 if (ftdi_elan_checkingPCI(ftdi) == 0) {
 575                         work_delay_in_msec = 250;
 576                 } else if (ftdi->controlreg & 0x00400000) {
 577                         if (ftdi->gone_away > 0) {
 578                                 dev_err(&ftdi->udev->dev, "PCI device eject con"
 579                                         "firmed platform_dev.dev.parent=%p plat"
 580                                         "form_dev.dev=%p\n",
 581                                         ftdi->platform_dev.dev.parent,
 582                                         &ftdi->platform_dev.dev);
 583                                 platform_device_unregister(&ftdi->platform_dev);
 584                                 ftdi->platform_dev.dev.parent = NULL;
 585                                 ftdi->registered = 0;
 586                                 ftdi->enumerated = 0;
 587                                 ftdi->card_ejected = 0;
 588                                 ftdi->initialized = 0;
 589                                 ftdi->gone_away = 0;
 590                         } else
 591                                 ftdi_elan_flush_targets(ftdi);
 592                         work_delay_in_msec = 250;
 593                 } else {
 594                         dev_err(&ftdi->udev->dev, "PCI device has disappeared\n"
 595                                 );
 596                         ftdi_elan_cancel_targets(ftdi);
 597                         work_delay_in_msec = 500;
 598                         ftdi->enumerated = 0;
 599                         ftdi->initialized = 0;
 600                 }
 601         }
 602         if (ftdi->disconnected > 0) {
 603                 ftdi_elan_put_kref(ftdi);
 604                 return;
 605         } else {
 606                 ftdi_status_requeue_work(ftdi,
 607                         msecs_to_jiffies(work_delay_in_msec));
 608                 return;
 609         }
 610 }
 611
 612
 613 /*
 614 * file_operations for the jtag interface
 615 *
 616 * the usage count for the device is incremented on open()
 617 * and decremented on release()
 618 */
 619 static int ftdi_elan_open(struct inode *inode, struct file *file)
 620 {
 621         int subminor;
 622         struct usb_interface *interface;
 623
 624         subminor = iminor(inode);
 625         interface = usb_find_interface(&ftdi_elan_driver, subminor);
 626
 627         if (!interface) {
 628                 printk(KERN_ERR "can't find device for minor %d\n", subminor);
 629                 return -ENODEV;
 630         } else {
 631                 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
 632                 if (!ftdi) {
 633                         return -ENODEV;
 634                 } else {
 635                         if (down_interruptible(&ftdi->sw_lock)) {
 636                                 return -EINTR;
 637                         } else {
 638                                 ftdi_elan_get_kref(ftdi);
 639                                 file->private_data = ftdi;
 640                                 return 0;
 641                         }
 642                 }
 643         }
 644 }
 645
 646 static int ftdi_elan_release(struct inode *inode, struct file *file)
 647 {
 648         struct usb_ftdi *ftdi = file->private_data;
 649         if (ftdi == NULL)
 650                 return -ENODEV;
 651         up(&ftdi->sw_lock);        /* decrement the count on our device */
 652         ftdi_elan_put_kref(ftdi);
 653         return 0;
 654 }
 655
 656
 657 /*
 658 *
 659 * blocking bulk reads are used to get data from the device
 660 *
 661 */
 662 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 663                               size_t count, loff_t *ppos)
 664 {
 665         char data[30 *3 + 4];
 666         char *d = data;
 667         int m = (sizeof(data) - 1) / 3;
 668         int bytes_read = 0;
 669         int retry_on_empty = 10;
 670         int retry_on_timeout = 5;
 671         struct usb_ftdi *ftdi = file->private_data;
 672         if (ftdi->disconnected > 0) {
 673                 return -ENODEV;
 674         }
 675         data[0] = 0;
 676       have:if (ftdi->bulk_in_left > 0) {
 677                 if (count-- > 0) {
 678                         char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 679                         ftdi->bulk_in_left -= 1;
 680                         if (bytes_read < m) {
 681                                 d += sprintf(d, " %02X", 0x000000FF & *p);
 682                         } else if (bytes_read > m) {
 683                         } else
 684                                 d += sprintf(d, " ..");
 685                         if (copy_to_user(buffer++, p, 1)) {
 686                                 return -EFAULT;
 687                         } else {
 688                                 bytes_read += 1;
 689                                 goto have;
 690                         }
 691                 } else
 692                         return bytes_read;
 693         }
 694       more:if (count > 0) {
 695                 int packet_bytes = 0;
 696                 int retval = usb_bulk_msg(ftdi->udev,
 697                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 698                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 699                         &packet_bytes, 50);
 700                 if (packet_bytes > 2) {
 701                         ftdi->bulk_in_left = packet_bytes - 2;
 702                         ftdi->bulk_in_last = 1;
 703                         goto have;
 704                 } else if (retval == -ETIMEDOUT) {
 705                         if (retry_on_timeout-- > 0) {
 706                                 goto more;
 707                         } else if (bytes_read > 0) {
 708                                 return bytes_read;
 709                         } else
 710                                 return retval;
 711                 } else if (retval == 0) {
 712                         if (retry_on_empty-- > 0) {
 713                                 goto more;
 714                         } else
 715                                 return bytes_read;
 716                 } else
 717                         return retval;
 718         } else
 719                 return bytes_read;
 720 }
 721
 722 static void ftdi_elan_write_bulk_callback(struct urb *urb)
 723 {
 724         struct usb_ftdi *ftdi = urb->context;
 725         int status = urb->status;
 726
 727         if (status && !(status == -ENOENT || status == -ECONNRESET ||
 728             status == -ESHUTDOWN)) {
 729                 dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %"
 730                         "d\n", urb, status);
 731         }
 732         usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 733                 urb->transfer_buffer, urb->transfer_dma);
 734 }
 735
 736 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 737         char *buf, int command_size, int total_size)
 738 {
 739         int ed_commands = 0;
 740         int b = 0;
 741         int I = command_size;
 742         int i = ftdi->command_head;
 743         while (I-- > 0) {
 744                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 745                         i++];
 746                 int F = command->follows;
 747                 u8 *f = command->buffer;
 748                 if (command->header & 0x80) {
 749                         ed_commands |= 1 << (0x3 & (command->header >> 5));
 750                 }
 751                 buf[b++] = command->header;
 752                 buf[b++] = (command->length >> 0) & 0x00FF;
 753                 buf[b++] = (command->length >> 8) & 0x00FF;
 754                 buf[b++] = command->address;
 755                 buf[b++] = command->width;
 756                 while (F-- > 0) {
 757                         buf[b++] = *f++;
 758                 }
 759         }
 760         return ed_commands;
 761 }
 762
 763 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 764 {
 765         int total_size = 0;
 766         int I = command_size;
 767         int i = ftdi->command_head;
 768         while (I-- > 0) {
 769                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 770                         i++];
 771                 total_size += 5 + command->follows;
 772         } return total_size;
 773 }
 774
 775 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 776 {
 777         int retval;
 778         char *buf;
 779         int ed_commands;
 780         int total_size;
 781         struct urb *urb;
 782         int command_size = ftdi->command_next - ftdi->command_head;
 783         if (command_size == 0)
 784                 return 0;
 785         total_size = ftdi_elan_total_command_size(ftdi, command_size);
 786         urb = usb_alloc_urb(0, GFP_KERNEL);
 787         if (!urb) {
 788                 dev_err(&ftdi->udev->dev, "could not get a urb to write %d comm"
 789                         "ands totaling %d bytes to the Uxxx\n", command_size,
 790                         total_size);
 791                 return -ENOMEM;
 792         }
 793         buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
 794                 &urb->transfer_dma);
 795         if (!buf) {
 796                 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d c"
 797                         "ommands totaling %d bytes to the Uxxx\n", command_size,
 798                          total_size);
 799                 usb_free_urb(urb);
 800                 return -ENOMEM;
 801         }
 802         ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 803                 command_size, total_size);
 804         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 805                 ftdi->bulk_out_endpointAddr), buf, total_size,
 806                 ftdi_elan_write_bulk_callback, ftdi);
 807         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 808         if (ed_commands) {
 809                 char diag[40 *3 + 4];
 810                 char *d = diag;
 811                 int m = total_size;
 812                 u8 *c = buf;
 813                 int s = (sizeof(diag) - 1) / 3;
 814                 diag[0] = 0;
 815                 while (s-- > 0 && m-- > 0) {
 816                         if (s > 0 || m == 0) {
 817                                 d += sprintf(d, " %02X", *c++);
 818                         } else
 819                                 d += sprintf(d, " ..");
 820                 }
 821         }
 822         retval = usb_submit_urb(urb, GFP_KERNEL);
 823         if (retval) {
 824                 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write "
 825                         "%d commands totaling %d bytes to the Uxxx\n", retval,
 826                         urb, command_size, total_size);
 827                 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
 828                 usb_free_urb(urb);
 829                 return retval;
 830         }
 831         usb_free_urb(urb);        /* release our reference to this urb,
 832                 the USB core will eventually free it entirely */
 833         ftdi->command_head += command_size;
 834         ftdi_elan_kick_respond_queue(ftdi);
 835         return 0;
 836 }
 837
 838 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 839         struct u132_target *target, u8 *buffer, int length)
 840 {
 841         struct urb *urb = target->urb;
 842         int halted = target->halted;
 843         int skipped = target->skipped;
 844         int actual = target->actual;
 845         int non_null = target->non_null;
 846         int toggle_bits = target->toggle_bits;
 847         int error_count = target->error_count;
 848         int condition_code = target->condition_code;
 849         int repeat_number = target->repeat_number;
 850         void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 851                 int, int, int, int) = target->callback;
 852         target->active -= 1;
 853         target->callback = NULL;
 854         (*callback) (target->endp, urb, buffer, length, toggle_bits,
 855                 error_count, condition_code, repeat_number, halted, skipped,
 856                 actual, non_null);
 857 }
 858
 859 static char *have_ed_set_response(struct usb_ftdi *ftdi,
 860         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 861         char *b)
 862 {
 863         int payload = (ed_length >> 0) & 0x07FF;
 864         mutex_lock(&ftdi->u132_lock);
 865         target->actual = 0;
 866         target->non_null = (ed_length >> 15) & 0x0001;
 867         target->repeat_number = (ed_length >> 11) & 0x000F;
 868         if (ed_type == 0x02) {
 869                 if (payload == 0 || target->abandoning > 0) {
 870                         target->abandoning = 0;
 871                         mutex_unlock(&ftdi->u132_lock);
 872                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 873                                 payload);
 874                         ftdi->recieved = 0;
 875                         ftdi->expected = 4;
 876                         ftdi->ed_found = 0;
 877                         return ftdi->response;
 878                 } else {
 879                         ftdi->expected = 4 + payload;
 880                         ftdi->ed_found = 1;
 881                         mutex_unlock(&ftdi->u132_lock);
 882                         return b;
 883                 }
 884         } else if (ed_type == 0x03) {
 885                 if (payload == 0 || target->abandoning > 0) {
 886                         target->abandoning = 0;
 887                         mutex_unlock(&ftdi->u132_lock);
 888                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 889                                 payload);
 890                         ftdi->recieved = 0;
 891                         ftdi->expected = 4;
 892                         ftdi->ed_found = 0;
 893                         return ftdi->response;
 894                 } else {
 895                         ftdi->expected = 4 + payload;
 896                         ftdi->ed_found = 1;
 897                         mutex_unlock(&ftdi->u132_lock);
 898                         return b;
 899                 }
 900         } else if (ed_type == 0x01) {
 901                 target->abandoning = 0;
 902                 mutex_unlock(&ftdi->u132_lock);
 903                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 904                         payload);
 905                 ftdi->recieved = 0;
 906                 ftdi->expected = 4;
 907                 ftdi->ed_found = 0;
 908                 return ftdi->response;
 909         } else {
 910                 target->abandoning = 0;
 911                 mutex_unlock(&ftdi->u132_lock);
 912                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 913                         payload);
 914                 ftdi->recieved = 0;
 915                 ftdi->expected = 4;
 916                 ftdi->ed_found = 0;
 917                 return ftdi->response;
 918         }
 919 }
 920
 921 static char *have_ed_get_response(struct usb_ftdi *ftdi,
 922         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 923         char *b)
 924 {
 925         mutex_lock(&ftdi->u132_lock);
 926         target->condition_code = TD_DEVNOTRESP;
 927         target->actual = (ed_length >> 0) & 0x01FF;
 928         target->non_null = (ed_length >> 15) & 0x0001;
 929         target->repeat_number = (ed_length >> 11) & 0x000F;
 930         mutex_unlock(&ftdi->u132_lock);
 931         if (target->active)
 932                 ftdi_elan_do_callback(ftdi, target, NULL, 0);
 933         target->abandoning = 0;
 934         ftdi->recieved = 0;
 935         ftdi->expected = 4;
 936         ftdi->ed_found = 0;
 937         return ftdi->response;
 938 }
 939
 940
 941 /*
 942 * The engine tries to empty the FTDI fifo
 943 *
 944 * all responses found in the fifo data are dispatched thus
 945 * the response buffer can only ever hold a maximum sized
 946 * response from the Uxxx.
 947 *
 948 */
 949 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 950 {
 951         u8 *b = ftdi->response + ftdi->recieved;
 952         int bytes_read = 0;
 953         int retry_on_empty = 1;
 954         int retry_on_timeout = 3;
 955         int empty_packets = 0;
 956       read:{
 957                 int packet_bytes = 0;
 958                 int retval = usb_bulk_msg(ftdi->udev,
 959                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 960                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 961                         &packet_bytes, 500);
 962                 char diag[30 *3 + 4];
 963                 char *d = diag;
 964                 int m = packet_bytes;
 965                 u8 *c = ftdi->bulk_in_buffer;
 966                 int s = (sizeof(diag) - 1) / 3;
 967                 diag[0] = 0;
 968                 while (s-- > 0 && m-- > 0) {
 969                         if (s > 0 || m == 0) {
 970                                 d += sprintf(d, " %02X", *c++);
 971                         } else
 972                                 d += sprintf(d, " ..");
 973                 }
 974                 if (packet_bytes > 2) {
 975                         ftdi->bulk_in_left = packet_bytes - 2;
 976                         ftdi->bulk_in_last = 1;
 977                         goto have;
 978                 } else if (retval == -ETIMEDOUT) {
 979                         if (retry_on_timeout-- > 0) {
 980                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
 981                                         "t_bytes = %d with total %d bytes%s\n",
 982                                         packet_bytes, bytes_read, diag);
 983                                 goto more;
 984                         } else if (bytes_read > 0) {
 985                                 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
 986                                         bytes_read, diag);
 987                                 return -ENOMEM;
 988                         } else {
 989                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
 990                                         "t_bytes = %d with total %d bytes%s\n",
 991                                         packet_bytes, bytes_read, diag);
 992                                 return -ENOMEM;
 993                         }
 994                 } else if (retval == -EILSEQ) {
 995                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
 996                                 " = %d with total %d bytes%s\n", retval,
 997                                 packet_bytes, bytes_read, diag);
 998                         return retval;
 999                 } else if (retval) {
1000                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1001                                 " = %d with total %d bytes%s\n", retval,
1002                                 packet_bytes, bytes_read, diag);
1003                         return retval;
1004                 } else if (packet_bytes == 2) {
1005                         unsigned char s0 = ftdi->bulk_in_buffer[0];
1006                         unsigned char s1 = ftdi->bulk_in_buffer[1];
1007                         empty_packets += 1;
1008                         if (s0 == 0x31 && s1 == 0x60) {
1009                                 if (retry_on_empty-- > 0) {
1010                                         goto more;
1011                                 } else
1012                                         return 0;
1013                         } else if (s0 == 0x31 && s1 == 0x00) {
1014                                 if (retry_on_empty-- > 0) {
1015                                         goto more;
1016                                 } else
1017                                         return 0;
1018                         } else {
1019                                 if (retry_on_empty-- > 0) {
1020                                         goto more;
1021                                 } else
1022                                         return 0;
1023                         }
1024                 } else if (packet_bytes == 1) {
1025                         if (retry_on_empty-- > 0) {
1026                                 goto more;
1027                         } else
1028                                 return 0;
1029                 } else {
1030                         if (retry_on_empty-- > 0) {
1031                                 goto more;
1032                         } else
1033                                 return 0;
1034                 }
1035         }
1036       more:{
1037                 goto read;
1038         }
1039       have:if (ftdi->bulk_in_left > 0) {
1040                 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1041                 bytes_read += 1;
1042                 ftdi->bulk_in_left -= 1;
1043                 if (ftdi->recieved == 0 && c == 0xFF) {
1044                         goto have;
1045                 } else
1046                         *b++ = c;
1047                 if (++ftdi->recieved < ftdi->expected) {
1048                         goto have;
1049                 } else if (ftdi->ed_found) {
1050                         int ed_number = (ftdi->response[0] >> 5) & 0x03;
1051                         u16 ed_length = (ftdi->response[2] << 8) |
1052                                 ftdi->response[1];
1053                         struct u132_target *target = &ftdi->target[ed_number];
1054                         int payload = (ed_length >> 0) & 0x07FF;
1055                         char diag[30 *3 + 4];
1056                         char *d = diag;
1057                         int m = payload;
1058                         u8 *c = 4 + ftdi->response;
1059                         int s = (sizeof(diag) - 1) / 3;
1060                         diag[0] = 0;
1061                         while (s-- > 0 && m-- > 0) {
1062                                 if (s > 0 || m == 0) {
1063                                         d += sprintf(d, " %02X", *c++);
1064                                 } else
1065                                         d += sprintf(d, " ..");
1066                         }
1067                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1068                                 payload);
1069                         ftdi->recieved = 0;
1070                         ftdi->expected = 4;
1071                         ftdi->ed_found = 0;
1072                         b = ftdi->response;
1073                         goto have;
1074                 } else if (ftdi->expected == 8) {
1075                         u8 buscmd;
1076                         int respond_head = ftdi->respond_head++;
1077                         struct u132_respond *respond = &ftdi->respond[
1078                                 RESPOND_MASK & respond_head];
1079                         u32 data = ftdi->response[7];
1080                         data <<= 8;
1081                         data |= ftdi->response[6];
1082                         data <<= 8;
1083                         data |= ftdi->response[5];
1084                         data <<= 8;
1085                         data |= ftdi->response[4];
1086                         *respond->value = data;
1087                         *respond->result = 0;
1088                         complete(&respond->wait_completion);
1089                         ftdi->recieved = 0;
1090                         ftdi->expected = 4;
1091                         ftdi->ed_found = 0;
1092                         b = ftdi->response;
1093                         buscmd = (ftdi->response[0] >> 0) & 0x0F;
1094                         if (buscmd == 0x00) {
1095                         } else if (buscmd == 0x02) {
1096                         } else if (buscmd == 0x06) {
1097                         } else if (buscmd == 0x0A) {
1098                         } else
1099                                 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) va"
1100                                         "lue = %08X\n", buscmd, data);
1101                         goto have;
1102                 } else {
1103                         if ((ftdi->response[0] & 0x80) == 0x00) {
1104                                 ftdi->expected = 8;
1105                                 goto have;
1106                         } else {
1107                                 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1108                                 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1109                                 u16 ed_length = (ftdi->response[2] << 8) |
1110                                         ftdi->response[1];
1111                                 struct u132_target *target = &ftdi->target[
1112                                         ed_number];
1113                                 target->halted = (ftdi->response[0] >> 3) &
1114                                         0x01;
1115                                 target->skipped = (ftdi->response[0] >> 2) &
1116                                         0x01;
1117                                 target->toggle_bits = (ftdi->response[3] >> 6)
1118                                         & 0x03;
1119                                 target->error_count = (ftdi->response[3] >> 4)
1120                                         & 0x03;
1121                                 target->condition_code = (ftdi->response[
1122                                         3] >> 0) & 0x0F;
1123                                 if ((ftdi->response[0] & 0x10) == 0x00) {
1124                                         b = have_ed_set_response(ftdi, target,
1125                                                 ed_length, ed_number, ed_type,
1126                                                 b);
1127                                         goto have;
1128                                 } else {
1129                                         b = have_ed_get_response(ftdi, target,
1130                                                 ed_length, ed_number, ed_type,
1131                                                 b);
1132                                         goto have;
1133                                 }
1134                         }
1135                 }
1136         } else
1137                 goto more;
1138 }
1139
1140
1141 /*
1142 * create a urb, and a buffer for it, and copy the data to the urb
1143 *
1144 */
1145 static ssize_t ftdi_elan_write(struct file *file,
1146                                const char __user *user_buffer, size_t count,
1147                                loff_t *ppos)
1148 {
1149         int retval = 0;
1150         struct urb *urb;
1151         char *buf;
1152         struct usb_ftdi *ftdi = file->private_data;
1153
1154         if (ftdi->disconnected > 0) {
1155                 return -ENODEV;
1156         }
1157         if (count == 0) {
1158                 goto exit;
1159         }
1160         urb = usb_alloc_urb(0, GFP_KERNEL);
1161         if (!urb) {
1162                 retval = -ENOMEM;
1163                 goto error_1;
1164         }
1165         buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1166                 &urb->transfer_dma);
1167         if (!buf) {
1168                 retval = -ENOMEM;
1169                 goto error_2;
1170         }
1171         if (copy_from_user(buf, user_buffer, count)) {
1172                 retval = -EFAULT;
1173                 goto error_3;
1174         }
1175         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1176                 ftdi->bulk_out_endpointAddr), buf, count,
1177                 ftdi_elan_write_bulk_callback, ftdi);
1178         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1179         retval = usb_submit_urb(urb, GFP_KERNEL);
1180         if (retval) {
1181                 dev_err(&ftdi->udev->dev, "failed submitting write urb, error %"
1182                         "d\n", retval);
1183                 goto error_3;
1184         }
1185         usb_free_urb(urb);
1186
1187 exit:
1188         return count;
1189 error_3:
1190         usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1191 error_2:
1192         usb_free_urb(urb);
1193 error_1:
1194         return retval;
1195 }
1196
1197 static const struct file_operations ftdi_elan_fops = {
1198         .owner = THIS_MODULE,
1199         .llseek = no_llseek,
1200         .read = ftdi_elan_read,
1201         .write = ftdi_elan_write,
1202         .open = ftdi_elan_open,
1203         .release = ftdi_elan_release,
1204 };
1205
1206 /*
1207 * usb class driver info in order to get a minor number from the usb core,
1208 * and to have the device registered with the driver core
1209 */
1210 static struct usb_class_driver ftdi_elan_jtag_class = {
1211         .name = "ftdi-%d-jtag",
1212         .fops = &ftdi_elan_fops,
1213         .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1214 };
1215
1216 /*
1217 * the following definitions are for the
1218 * ELAN FPGA state machgine processor that
1219 * lies on the other side of the FTDI chip
1220 */
1221 #define cPCIu132rd 0x0
1222 #define cPCIu132wr 0x1
1223 #define cPCIiord 0x2
1224 #define cPCIiowr 0x3
1225 #define cPCImemrd 0x6
1226 #define cPCImemwr 0x7
1227 #define cPCIcfgrd 0xA
1228 #define cPCIcfgwr 0xB
1229 #define cPCInull 0xF
1230 #define cU132cmd_status 0x0
1231 #define cU132flash 0x1
1232 #define cPIDsetup 0x0
1233 #define cPIDout 0x1
1234 #define cPIDin 0x2
1235 #define cPIDinonce 0x3
1236 #define cCCnoerror 0x0
1237 #define cCCcrc 0x1
1238 #define cCCbitstuff 0x2
1239 #define cCCtoggle 0x3
1240 #define cCCstall 0x4
1241 #define cCCnoresp 0x5
1242 #define cCCbadpid1 0x6
1243 #define cCCbadpid2 0x7
1244 #define cCCdataoverrun 0x8
1245 #define cCCdataunderrun 0x9
1246 #define cCCbuffoverrun 0xC
1247 #define cCCbuffunderrun 0xD
1248 #define cCCnotaccessed 0xF
1249 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1250 {
1251       wait:if (ftdi->disconnected > 0) {
1252                 return -ENODEV;
1253         } else {
1254                 int command_size;
1255                 mutex_lock(&ftdi->u132_lock);
1256                 command_size = ftdi->command_next - ftdi->command_head;
1257                 if (command_size < COMMAND_SIZE) {
1258                         struct u132_command *command = &ftdi->command[
1259                                 COMMAND_MASK & ftdi->command_next];
1260                         command->header = 0x00 | cPCIu132wr;
1261                         command->length = 0x04;
1262                         command->address = 0x00;
1263                         command->width = 0x00;
1264                         command->follows = 4;
1265                         command->value = data;
1266                         command->buffer = &command->value;
1267                         ftdi->command_next += 1;
1268                         ftdi_elan_kick_command_queue(ftdi);
1269                         mutex_unlock(&ftdi->u132_lock);
1270                         return 0;
1271                 } else {
1272                         mutex_unlock(&ftdi->u132_lock);
1273                         msleep(100);
1274                         goto wait;
1275                 }
1276         }
1277 }
1278
1279 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1280         u8 width, u32 data)
1281 {
1282         u8 addressofs = config_offset / 4;
1283       wait:if (ftdi->disconnected > 0) {
1284                 return -ENODEV;
1285         } else {
1286                 int command_size;
1287                 mutex_lock(&ftdi->u132_lock);
1288                 command_size = ftdi->command_next - ftdi->command_head;
1289                 if (command_size < COMMAND_SIZE) {
1290                         struct u132_command *command = &ftdi->command[
1291                                 COMMAND_MASK & ftdi->command_next];
1292                         command->header = 0x00 | (cPCIcfgwr & 0x0F);
1293                         command->length = 0x04;
1294                         command->address = addressofs;
1295                         command->width = 0x00 | (width & 0x0F);
1296                         command->follows = 4;
1297                         command->value = data;
1298                         command->buffer = &command->value;
1299                         ftdi->command_next += 1;
1300                         ftdi_elan_kick_command_queue(ftdi);
1301                         mutex_unlock(&ftdi->u132_lock);
1302                         return 0;
1303                 } else {
1304                         mutex_unlock(&ftdi->u132_lock);
1305                         msleep(100);
1306                         goto wait;
1307                 }
1308         }
1309 }
1310
1311 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1312         u8 width, u32 data)
1313 {
1314         u8 addressofs = mem_offset / 4;
1315       wait:if (ftdi->disconnected > 0) {
1316                 return -ENODEV;
1317         } else {
1318                 int command_size;
1319                 mutex_lock(&ftdi->u132_lock);
1320                 command_size = ftdi->command_next - ftdi->command_head;
1321                 if (command_size < COMMAND_SIZE) {
1322                         struct u132_command *command = &ftdi->command[
1323                                 COMMAND_MASK & ftdi->command_next];
1324                         command->header = 0x00 | (cPCImemwr & 0x0F);
1325                         command->length = 0x04;
1326                         command->address = addressofs;
1327                         command->width = 0x00 | (width & 0x0F);
1328                         command->follows = 4;
1329                         command->value = data;
1330                         command->buffer = &command->value;
1331                         ftdi->command_next += 1;
1332                         ftdi_elan_kick_command_queue(ftdi);
1333                         mutex_unlock(&ftdi->u132_lock);
1334                         return 0;
1335                 } else {
1336                         mutex_unlock(&ftdi->u132_lock);
1337                         msleep(100);
1338                         goto wait;
1339                 }
1340         }
1341 }
1342
1343 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1344         u8 width, u32 data)
1345 {
1346         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1347         return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1348 }
1349
1350
1351 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1352 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1353 {
1354       wait:if (ftdi->disconnected > 0) {
1355                 return -ENODEV;
1356         } else {
1357                 int command_size;
1358                 int respond_size;
1359                 mutex_lock(&ftdi->u132_lock);
1360                 command_size = ftdi->command_next - ftdi->command_head;
1361                 respond_size = ftdi->respond_next - ftdi->respond_head;
1362                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1363                         {
1364                         struct u132_command *command = &ftdi->command[
1365                                 COMMAND_MASK & ftdi->command_next];
1366                         struct u132_respond *respond = &ftdi->respond[
1367                                 RESPOND_MASK & ftdi->respond_next];
1368                         int result = -ENODEV;
1369                         respond->result = &result;
1370                         respond->header = command->header = 0x00 | cPCIu132rd;
1371                         command->length = 0x04;
1372                         respond->address = command->address = cU132cmd_status;
1373                         command->width = 0x00;
1374                         command->follows = 0;
1375                         command->value = 0;
1376                         command->buffer = NULL;
1377                         respond->value = data;
1378                         init_completion(&respond->wait_completion);
1379                         ftdi->command_next += 1;
1380                         ftdi->respond_next += 1;
1381                         ftdi_elan_kick_command_queue(ftdi);
1382                         mutex_unlock(&ftdi->u132_lock);
1383                         wait_for_completion(&respond->wait_completion);
1384                         return result;
1385                 } else {
1386                         mutex_unlock(&ftdi->u132_lock);
1387                         msleep(100);
1388                         goto wait;
1389                 }
1390         }
1391 }
1392
1393 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1394         u8 width, u32 *data)
1395 {
1396         u8 addressofs = config_offset / 4;
1397       wait:if (ftdi->disconnected > 0) {
1398                 return -ENODEV;
1399         } else {
1400                 int command_size;
1401                 int respond_size;
1402                 mutex_lock(&ftdi->u132_lock);
1403                 command_size = ftdi->command_next - ftdi->command_head;
1404                 respond_size = ftdi->respond_next - ftdi->respond_head;
1405                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1406                         {
1407                         struct u132_command *command = &ftdi->command[
1408                                 COMMAND_MASK & ftdi->command_next];
1409                         struct u132_respond *respond = &ftdi->respond[
1410                                 RESPOND_MASK & ftdi->respond_next];
1411                         int result = -ENODEV;
1412                         respond->result = &result;
1413                         respond->header = command->header = 0x00 | (cPCIcfgrd &
1414                                 0x0F);
1415                         command->length = 0x04;
1416                         respond->address = command->address = addressofs;
1417                         command->width = 0x00 | (width & 0x0F);
1418                         command->follows = 0;
1419                         command->value = 0;
1420                         command->buffer = NULL;
1421                         respond->value = data;
1422                         init_completion(&respond->wait_completion);
1423                         ftdi->command_next += 1;
1424                         ftdi->respond_next += 1;
1425                         ftdi_elan_kick_command_queue(ftdi);
1426                         mutex_unlock(&ftdi->u132_lock);
1427                         wait_for_completion(&respond->wait_completion);
1428                         return result;
1429                 } else {
1430                         mutex_unlock(&ftdi->u132_lock);
1431                         msleep(100);
1432                         goto wait;
1433                 }
1434         }
1435 }
1436
1437 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1438         u8 width, u32 *data)
1439 {
1440         u8 addressofs = mem_offset / 4;
1441       wait:if (ftdi->disconnected > 0) {
1442                 return -ENODEV;
1443         } else {
1444                 int command_size;
1445                 int respond_size;
1446                 mutex_lock(&ftdi->u132_lock);
1447                 command_size = ftdi->command_next - ftdi->command_head;
1448                 respond_size = ftdi->respond_next - ftdi->respond_head;
1449                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1450                         {
1451                         struct u132_command *command = &ftdi->command[
1452                                 COMMAND_MASK & ftdi->command_next];
1453                         struct u132_respond *respond = &ftdi->respond[
1454                                 RESPOND_MASK & ftdi->respond_next];
1455                         int result = -ENODEV;
1456                         respond->result = &result;
1457                         respond->header = command->header = 0x00 | (cPCImemrd &
1458                                 0x0F);
1459                         command->length = 0x04;
1460                         respond->address = command->address = addressofs;
1461                         command->width = 0x00 | (width & 0x0F);
1462                         command->follows = 0;
1463                         command->value = 0;
1464                         command->buffer = NULL;
1465                         respond->value = data;
1466                         init_completion(&respond->wait_completion);
1467                         ftdi->command_next += 1;
1468                         ftdi->respond_next += 1;
1469                         ftdi_elan_kick_command_queue(ftdi);
1470                         mutex_unlock(&ftdi->u132_lock);
1471                         wait_for_completion(&respond->wait_completion);
1472                         return result;
1473                 } else {
1474                         mutex_unlock(&ftdi->u132_lock);
1475                         msleep(100);
1476                         goto wait;
1477                 }
1478         }
1479 }
1480
1481 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1482         u8 width, u32 *data)
1483 {
1484         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1485         if (ftdi->initialized == 0) {
1486                 return -ENODEV;
1487         } else
1488                 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1489 }
1490
1491
1492 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1493 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1494         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1495         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1496         int toggle_bits, int error_count, int condition_code, int repeat_number,
1497          int halted, int skipped, int actual, int non_null))
1498 {
1499         u8 ed = ed_number - 1;
1500       wait:if (ftdi->disconnected > 0) {
1501                 return -ENODEV;
1502         } else if (ftdi->initialized == 0) {
1503                 return -ENODEV;
1504         } else {
1505                 int command_size;
1506                 mutex_lock(&ftdi->u132_lock);
1507                 command_size = ftdi->command_next - ftdi->command_head;
1508                 if (command_size < COMMAND_SIZE) {
1509                         struct u132_target *target = &ftdi->target[ed];
1510                         struct u132_command *command = &ftdi->command[
1511                                 COMMAND_MASK & ftdi->command_next];
1512                         command->header = 0x80 | (ed << 5);
1513                         command->length = 0x8007;
1514                         command->address = (toggle_bits << 6) | (ep_number << 2)
1515                                 | (address << 0);
1516                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1517                                 usb_pipeout(urb->pipe));
1518                         command->follows = 8;
1519                         command->value = 0;
1520                         command->buffer = urb->setup_packet;
1521                         target->callback = callback;
1522                         target->endp = endp;
1523                         target->urb = urb;
1524                         target->active = 1;
1525                         ftdi->command_next += 1;
1526                         ftdi_elan_kick_command_queue(ftdi);
1527                         mutex_unlock(&ftdi->u132_lock);
1528                         return 0;
1529                 } else {
1530                         mutex_unlock(&ftdi->u132_lock);
1531                         msleep(100);
1532                         goto wait;
1533                 }
1534         }
1535 }
1536
1537 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1538         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1539         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1540         int toggle_bits, int error_count, int condition_code, int repeat_number,
1541          int halted, int skipped, int actual, int non_null))
1542 {
1543         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1544         return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1545                 ep_number, toggle_bits, callback);
1546 }
1547
1548
1549 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1550 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1551         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1552         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1553         int toggle_bits, int error_count, int condition_code, int repeat_number,
1554          int halted, int skipped, int actual, int non_null))
1555 {
1556         u8 ed = ed_number - 1;
1557       wait:if (ftdi->disconnected > 0) {
1558                 return -ENODEV;
1559         } else if (ftdi->initialized == 0) {
1560                 return -ENODEV;
1561         } else {
1562                 int command_size;
1563                 mutex_lock(&ftdi->u132_lock);
1564                 command_size = ftdi->command_next - ftdi->command_head;
1565                 if (command_size < COMMAND_SIZE) {
1566                         struct u132_target *target = &ftdi->target[ed];
1567                         struct u132_command *command = &ftdi->command[
1568                                 COMMAND_MASK & ftdi->command_next];
1569                         u32 remaining_length = urb->transfer_buffer_length -
1570                                 urb->actual_length;
1571                         command->header = 0x82 | (ed << 5);
1572                         if (remaining_length == 0) {
1573                                 command->length = 0x0000;
1574                         } else if (remaining_length > 1024) {
1575                                 command->length = 0x8000 | 1023;
1576                         } else
1577                                 command->length = 0x8000 | (remaining_length -
1578                                         1);
1579                         command->address = (toggle_bits << 6) | (ep_number << 2)
1580                                 | (address << 0);
1581                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1582                                 usb_pipeout(urb->pipe));
1583                         command->follows = 0;
1584                         command->value = 0;
1585                         command->buffer = NULL;
1586                         target->callback = callback;
1587                         target->endp = endp;
1588                         target->urb = urb;
1589                         target->active = 1;
1590                         ftdi->command_next += 1;
1591                         ftdi_elan_kick_command_queue(ftdi);
1592                         mutex_unlock(&ftdi->u132_lock);
1593                         return 0;
1594                 } else {
1595                         mutex_unlock(&ftdi->u132_lock);
1596                         msleep(100);
1597                         goto wait;
1598                 }
1599         }
1600 }
1601
1602 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1603         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1604         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1605         int toggle_bits, int error_count, int condition_code, int repeat_number,
1606          int halted, int skipped, int actual, int non_null))
1607 {
1608         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1609         return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1610                 ep_number, toggle_bits, callback);
1611 }
1612
1613
1614 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1615 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1616         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1617         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1618         int toggle_bits, int error_count, int condition_code, int repeat_number,
1619          int halted, int skipped, int actual, int non_null))
1620 {
1621         u8 ed = ed_number - 1;
1622       wait:if (ftdi->disconnected > 0) {
1623                 return -ENODEV;
1624         } else if (ftdi->initialized == 0) {
1625                 return -ENODEV;
1626         } else {
1627                 int command_size;
1628                 mutex_lock(&ftdi->u132_lock);
1629                 command_size = ftdi->command_next - ftdi->command_head;
1630                 if (command_size < COMMAND_SIZE) {
1631                         struct u132_target *target = &ftdi->target[ed];
1632                         struct u132_command *command = &ftdi->command[
1633                                 COMMAND_MASK & ftdi->command_next];
1634                         command->header = 0x81 | (ed << 5);
1635                         command->length = 0x0000;
1636                         command->address = (toggle_bits << 6) | (ep_number << 2)
1637                                 | (address << 0);
1638                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1639                                 usb_pipeout(urb->pipe));
1640                         command->follows = 0;
1641                         command->value = 0;
1642                         command->buffer = NULL;
1643                         target->callback = callback;
1644                         target->endp = endp;
1645                         target->urb = urb;
1646                         target->active = 1;
1647                         ftdi->command_next += 1;
1648                         ftdi_elan_kick_command_queue(ftdi);
1649                         mutex_unlock(&ftdi->u132_lock);
1650                         return 0;
1651                 } else {
1652                         mutex_unlock(&ftdi->u132_lock);
1653                         msleep(100);
1654                         goto wait;
1655                 }
1656         }
1657 }
1658
1659 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1660         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1661         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1662         int toggle_bits, int error_count, int condition_code, int repeat_number,
1663          int halted, int skipped, int actual, int non_null))
1664 {
1665         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1666         return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1667                 ep_number, toggle_bits, callback);
1668 }
1669
1670
1671 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1672 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1673         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1674         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1675         int toggle_bits, int error_count, int condition_code, int repeat_number,
1676          int halted, int skipped, int actual, int non_null))
1677 {
1678         u8 ed = ed_number - 1;
1679       wait:if (ftdi->disconnected > 0) {
1680                 return -ENODEV;
1681         } else if (ftdi->initialized == 0) {
1682                 return -ENODEV;
1683         } else {
1684                 int command_size;
1685                 mutex_lock(&ftdi->u132_lock);
1686                 command_size = ftdi->command_next - ftdi->command_head;
1687                 if (command_size < COMMAND_SIZE) {
1688                         u8 *b;
1689                         u16 urb_size;
1690                         int i = 0;
1691                         char data[30 *3 + 4];
1692                         char *d = data;
1693                         int m = (sizeof(data) - 1) / 3;
1694                         int l = 0;
1695                         struct u132_target *target = &ftdi->target[ed];
1696                         struct u132_command *command = &ftdi->command[
1697                                 COMMAND_MASK & ftdi->command_next];
1698                         command->header = 0x81 | (ed << 5);
1699                         command->address = (toggle_bits << 6) | (ep_number << 2)
1700                                 | (address << 0);
1701                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1702                                 usb_pipeout(urb->pipe));
1703                         command->follows = min_t(u32, 1024,
1704                                 urb->transfer_buffer_length -
1705                                 urb->actual_length);
1706                         command->value = 0;
1707                         command->buffer = urb->transfer_buffer +
1708                                 urb->actual_length;
1709                         command->length = 0x8000 | (command->follows - 1);
1710                         b = command->buffer;
1711                         urb_size = command->follows;
1712                         data[0] = 0;
1713                         while (urb_size-- > 0) {
1714                                 if (i > m) {
1715                                 } else if (i++ < m) {
1716                                         int w = sprintf(d, " %02X", *b++);
1717                                         d += w;
1718                                         l += w;
1719                                 } else
1720                                         d += sprintf(d, " ..");
1721                         }
1722                         target->callback = callback;
1723                         target->endp = endp;
1724                         target->urb = urb;
1725                         target->active = 1;
1726                         ftdi->command_next += 1;
1727                         ftdi_elan_kick_command_queue(ftdi);
1728                         mutex_unlock(&ftdi->u132_lock);
1729                         return 0;
1730                 } else {
1731                         mutex_unlock(&ftdi->u132_lock);
1732                         msleep(100);
1733                         goto wait;
1734                 }
1735         }
1736 }
1737
1738 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1739         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1740         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1741         int toggle_bits, int error_count, int condition_code, int repeat_number,
1742          int halted, int skipped, int actual, int non_null))
1743 {
1744         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1745         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1746                 ep_number, toggle_bits, callback);
1747 }
1748
1749
1750 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1751 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1752         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1753         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1754         int toggle_bits, int error_count, int condition_code, int repeat_number,
1755          int halted, int skipped, int actual, int non_null))
1756 {
1757         u8 ed = ed_number - 1;
1758       wait:if (ftdi->disconnected > 0) {
1759                 return -ENODEV;
1760         } else if (ftdi->initialized == 0) {
1761                 return -ENODEV;
1762         } else {
1763                 int command_size;
1764                 mutex_lock(&ftdi->u132_lock);
1765                 command_size = ftdi->command_next - ftdi->command_head;
1766                 if (command_size < COMMAND_SIZE) {
1767                         u32 remaining_length = urb->transfer_buffer_length -
1768                                 urb->actual_length;
1769                         struct u132_target *target = &ftdi->target[ed];
1770                         struct u132_command *command = &ftdi->command[
1771                                 COMMAND_MASK & ftdi->command_next];
1772                         command->header = 0x83 | (ed << 5);
1773                         if (remaining_length == 0) {
1774                                 command->length = 0x0000;
1775                         } else if (remaining_length > 1024) {
1776                                 command->length = 0x8000 | 1023;
1777                         } else
1778                                 command->length = 0x8000 | (remaining_length -
1779                                         1);
1780                         command->address = (toggle_bits << 6) | (ep_number << 2)
1781                                 | (address << 0);
1782                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1783                                 usb_pipeout(urb->pipe));
1784                         command->follows = 0;
1785                         command->value = 0;
1786                         command->buffer = NULL;
1787                         target->callback = callback;
1788                         target->endp = endp;
1789                         target->urb = urb;
1790                         target->active = 1;
1791                         ftdi->command_next += 1;
1792                         ftdi_elan_kick_command_queue(ftdi);
1793                         mutex_unlock(&ftdi->u132_lock);
1794                         return 0;
1795                 } else {
1796                         mutex_unlock(&ftdi->u132_lock);
1797                         msleep(100);
1798                         goto wait;
1799                 }
1800         }
1801 }
1802
1803 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1804         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1805         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1806         int toggle_bits, int error_count, int condition_code, int repeat_number,
1807          int halted, int skipped, int actual, int non_null))
1808 {
1809         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1810         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1811                 ep_number, toggle_bits, callback);
1812 }
1813
1814
1815 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1816 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1817         void *endp)
1818 {
1819         u8 ed = ed_number - 1;
1820         if (ftdi->disconnected > 0) {
1821                 return -ENODEV;
1822         } else if (ftdi->initialized == 0) {
1823                 return -ENODEV;
1824         } else {
1825                 struct u132_target *target = &ftdi->target[ed];
1826                 mutex_lock(&ftdi->u132_lock);
1827                 if (target->abandoning > 0) {
1828                         mutex_unlock(&ftdi->u132_lock);
1829                         return 0;
1830                 } else {
1831                         target->abandoning = 1;
1832                       wait_1:if (target->active == 1) {
1833                                 int command_size = ftdi->command_next -
1834                                         ftdi->command_head;
1835                                 if (command_size < COMMAND_SIZE) {
1836                                         struct u132_command *command =
1837                                                 &ftdi->command[COMMAND_MASK &
1838                                                 ftdi->command_next];
1839                                         command->header = 0x80 | (ed << 5) |
1840                                                 0x4;
1841                                         command->length = 0x00;
1842                                         command->address = 0x00;
1843                                         command->width = 0x00;
1844                                         command->follows = 0;
1845                                         command->value = 0;
1846                                         command->buffer = &command->value;
1847                                         ftdi->command_next += 1;
1848                                         ftdi_elan_kick_command_queue(ftdi);
1849                                 } else {
1850                                         mutex_unlock(&ftdi->u132_lock);
1851                                         msleep(100);
1852                                         mutex_lock(&ftdi->u132_lock);
1853                                         goto wait_1;
1854                                 }
1855                         }
1856                         mutex_unlock(&ftdi->u132_lock);
1857                         return 0;
1858                 }
1859         }
1860 }
1861
1862 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1863         void *endp)
1864 {
1865         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1866         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1867 }
1868
1869
1870 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1871 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1872 {
1873         int retry_on_empty = 10;
1874         int retry_on_timeout = 5;
1875         int retry_on_status = 20;
1876       more:{
1877                 int packet_bytes = 0;
1878                 int retval = usb_bulk_msg(ftdi->udev,
1879                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1880                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1881                         &packet_bytes, 100);
1882                 if (packet_bytes > 2) {
1883                         char diag[30 *3 + 4];
1884                         char *d = diag;
1885                         int m = (sizeof(diag) - 1) / 3;
1886                         char *b = ftdi->bulk_in_buffer;
1887                         int bytes_read = 0;
1888                         diag[0] = 0;
1889                         while (packet_bytes-- > 0) {
1890                                 char c = *b++;
1891                                 if (bytes_read < m) {
1892                                         d += sprintf(d, " %02X",
1893                                                 0x000000FF & c);
1894                                 } else if (bytes_read > m) {
1895                                 } else
1896                                         d += sprintf(d, " ..");
1897                                 bytes_read += 1;
1898                                 continue;
1899                         }
1900                         goto more;
1901                 } else if (packet_bytes > 1) {
1902                         char s1 = ftdi->bulk_in_buffer[0];
1903                         char s2 = ftdi->bulk_in_buffer[1];
1904                         if (s1 == 0x31 && s2 == 0x60) {
1905                                 return 0;
1906                         } else if (retry_on_status-- > 0) {
1907                                 goto more;
1908                         } else {
1909                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1910                                         "imit reached\n");
1911                                 return -EFAULT;
1912                         }
1913                 } else if (packet_bytes > 0) {
1914                         char b1 = ftdi->bulk_in_buffer[0];
1915                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
1916                                 "TDI = %02X\n", b1);
1917                         if (retry_on_status-- > 0) {
1918                                 goto more;
1919                         } else {
1920                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1921                                         "imit reached\n");
1922                                 return -EFAULT;
1923                         }
1924                 } else if (retval == -ETIMEDOUT) {
1925                         if (retry_on_timeout-- > 0) {
1926                                 goto more;
1927                         } else {
1928                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
1929                                         "t reached\n");
1930                                 return -ENOMEM;
1931                         }
1932                 } else if (retval == 0) {
1933                         if (retry_on_empty-- > 0) {
1934                                 goto more;
1935                         } else {
1936                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
1937                                         "imit reached\n");
1938                                 return -ENOMEM;
1939                         }
1940                 } else {
1941                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1942                         return retval;
1943                 }
1944         }
1945         return -1;
1946 }
1947
1948
1949 /*
1950 * send the long flush sequence
1951 *
1952 */
1953 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1954 {
1955         int retval;
1956         struct urb *urb;
1957         char *buf;
1958         int I = 257;
1959         int i = 0;
1960         urb = usb_alloc_urb(0, GFP_KERNEL);
1961         if (!urb) {
1962                 dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequ"
1963                         "ence\n");
1964                 return -ENOMEM;
1965         }
1966         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1967         if (!buf) {
1968                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush seq"
1969                         "uence\n");
1970                 usb_free_urb(urb);
1971                 return -ENOMEM;
1972         }
1973         while (I-- > 0)
1974                 buf[i++] = 0x55;
1975         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1976                 ftdi->bulk_out_endpointAddr), buf, i,
1977                 ftdi_elan_write_bulk_callback, ftdi);
1978         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1979         retval = usb_submit_urb(urb, GFP_KERNEL);
1980         if (retval) {
1981                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
1982                         "flush sequence\n");
1983                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1984                 usb_free_urb(urb);
1985                 return -ENOMEM;
1986         }
1987         usb_free_urb(urb);
1988         return 0;
1989 }
1990
1991
1992 /*
1993 * send the reset sequence
1994 *
1995 */
1996 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1997 {
1998         int retval;
1999         struct urb *urb;
2000         char *buf;
2001         int I = 4;
2002         int i = 0;
2003         urb = usb_alloc_urb(0, GFP_KERNEL);
2004         if (!urb) {
2005                 dev_err(&ftdi->udev->dev, "could not get a urb for the reset se"
2006                         "quence\n");
2007                 return -ENOMEM;
2008         }
2009         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
2010         if (!buf) {
2011                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset"
2012                         " sequence\n");
2013                 usb_free_urb(urb);
2014                 return -ENOMEM;
2015         }
2016         buf[i++] = 0x55;
2017         buf[i++] = 0xAA;
2018         buf[i++] = 0x5A;
2019         buf[i++] = 0xA5;
2020         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2021                 ftdi->bulk_out_endpointAddr), buf, i,
2022                 ftdi_elan_write_bulk_callback, ftdi);
2023         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2024         retval = usb_submit_urb(urb, GFP_KERNEL);
2025         if (retval) {
2026                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
2027                         "reset sequence\n");
2028                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
2029                 usb_free_urb(urb);
2030                 return -ENOMEM;
2031         }
2032         usb_free_urb(urb);
2033         return 0;
2034 }
2035
2036 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2037 {
2038         int retval;
2039         int long_stop = 10;
2040         int retry_on_timeout = 5;
2041         int retry_on_empty = 10;
2042         int err_count = 0;
2043         retval = ftdi_elan_flush_input_fifo(ftdi);
2044         if (retval)
2045                 return retval;
2046         ftdi->bulk_in_left = 0;
2047         ftdi->bulk_in_last = -1;
2048         while (long_stop-- > 0) {
2049                 int read_stop;
2050                 int read_stuck;
2051                 retval = ftdi_elan_synchronize_flush(ftdi);
2052                 if (retval)
2053                         return retval;
2054                 retval = ftdi_elan_flush_input_fifo(ftdi);
2055                 if (retval)
2056                         return retval;
2057               reset:retval = ftdi_elan_synchronize_reset(ftdi);
2058                 if (retval)
2059                         return retval;
2060                 read_stop = 100;
2061                 read_stuck = 10;
2062               read:{
2063                         int packet_bytes = 0;
2064                         retval = usb_bulk_msg(ftdi->udev,
2065                                 usb_rcvbulkpipe(ftdi->udev,
2066                                 ftdi->bulk_in_endpointAddr),
2067                                 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2068                                 &packet_bytes, 500);
2069                         if (packet_bytes > 2) {
2070                                 char diag[30 *3 + 4];
2071                                 char *d = diag;
2072                                 int m = (sizeof(diag) - 1) / 3;
2073                                 char *b = ftdi->bulk_in_buffer;
2074                                 int bytes_read = 0;
2075                                 unsigned char c = 0;
2076                                 diag[0] = 0;
2077                                 while (packet_bytes-- > 0) {
2078                                         c = *b++;
2079                                         if (bytes_read < m) {
2080                                                 d += sprintf(d, " %02X", c);
2081                                         } else if (bytes_read > m) {
2082                                         } else
2083                                                 d += sprintf(d, " ..");
2084                                         bytes_read += 1;
2085                                         continue;
2086                                 }
2087                                 if (c == 0x7E) {
2088                                         return 0;
2089                                 } else {
2090                                         if (c == 0x55) {
2091                                                 goto read;
2092                                         } else if (read_stop-- > 0) {
2093                                                 goto read;
2094                                         } else {
2095                                                 dev_err(&ftdi->udev->dev, "retr"
2096                                                         "y limit reached\n");
2097                                                 continue;
2098                                         }
2099                                 }
2100                         } else if (packet_bytes > 1) {
2101                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2102                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2103                                 if (s1 == 0x31 && s2 == 0x00) {
2104                                         if (read_stuck-- > 0) {
2105                                                 goto read;
2106                                         } else
2107                                                 goto reset;
2108                                 } else if (s1 == 0x31 && s2 == 0x60) {
2109                                         if (read_stop-- > 0) {
2110                                                 goto read;
2111                                         } else {
2112                                                 dev_err(&ftdi->udev->dev, "retr"
2113                                                         "y limit reached\n");
2114                                                 continue;
2115                                         }
2116                                 } else {
2117                                         if (read_stop-- > 0) {
2118                                                 goto read;
2119                                         } else {
2120                                                 dev_err(&ftdi->udev->dev, "retr"
2121                                                         "y limit reached\n");
2122                                                 continue;
2123                                         }
2124                                 }
2125                         } else if (packet_bytes > 0) {
2126                                 if (read_stop-- > 0) {
2127                                         goto read;
2128                                 } else {
2129                                         dev_err(&ftdi->udev->dev, "retry limit "
2130                                                 "reached\n");
2131                                         continue;
2132                                 }
2133                         } else if (retval == -ETIMEDOUT) {
2134                                 if (retry_on_timeout-- > 0) {
2135                                         goto read;
2136                                 } else {
2137                                         dev_err(&ftdi->udev->dev, "TIMED OUT re"
2138                                                 "try limit reached\n");
2139                                         continue;
2140                                 }
2141                         } else if (retval == 0) {
2142                                 if (retry_on_empty-- > 0) {
2143                                         goto read;
2144                                 } else {
2145                                         dev_err(&ftdi->udev->dev, "empty packet"
2146                                                 " retry limit reached\n");
2147                                         continue;
2148                                 }
2149                         } else {
2150                                 err_count += 1;
2151                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2152                                         retval);
2153                                 if (read_stop-- > 0) {
2154                                         goto read;
2155                                 } else {
2156                                         dev_err(&ftdi->udev->dev, "retry limit "
2157                                                 "reached\n");
2158                                         continue;
2159                                 }
2160                         }
2161                 }
2162         }
2163         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2164         return -EFAULT;
2165 }
2166
2167 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2168 {
2169         int retry_on_empty = 10;
2170         int retry_on_timeout = 5;
2171         int retry_on_status = 50;
2172       more:{
2173                 int packet_bytes = 0;
2174                 int retval = usb_bulk_msg(ftdi->udev,
2175                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2176                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2177                         &packet_bytes, 1000);
2178                 if (packet_bytes > 2) {
2179                         char diag[30 *3 + 4];
2180                         char *d = diag;
2181                         int m = (sizeof(diag) - 1) / 3;
2182                         char *b = ftdi->bulk_in_buffer;
2183                         int bytes_read = 0;
2184                         diag[0] = 0;
2185                         while (packet_bytes-- > 0) {
2186                                 char c = *b++;
2187                                 if (bytes_read < m) {
2188                                         d += sprintf(d, " %02X",
2189                                                 0x000000FF & c);
2190                                 } else if (bytes_read > m) {
2191                                 } else
2192                                         d += sprintf(d, " ..");
2193                                 bytes_read += 1;
2194                                 continue;
2195                         }
2196                         goto more;
2197                 } else if (packet_bytes > 1) {
2198                         char s1 = ftdi->bulk_in_buffer[0];
2199                         char s2 = ftdi->bulk_in_buffer[1];
2200                         if (s1 == 0x31 && s2 == 0x60) {
2201                                 return 0;
2202                         } else if (retry_on_status-- > 0) {
2203                                 msleep(5);
2204                                 goto more;
2205                         } else
2206                                 return -EFAULT;
2207                 } else if (packet_bytes > 0) {
2208                         char b1 = ftdi->bulk_in_buffer[0];
2209                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
2210                                 "TDI = %02X\n", b1);
2211                         if (retry_on_status-- > 0) {
2212                                 msleep(5);
2213                                 goto more;
2214                         } else {
2215                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
2216                                         "imit reached\n");
2217                                 return -EFAULT;
2218                         }
2219                 } else if (retval == -ETIMEDOUT) {
2220                         if (retry_on_timeout-- > 0) {
2221                                 goto more;
2222                         } else {
2223                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
2224                                         "t reached\n");
2225                                 return -ENOMEM;
2226                         }
2227                 } else if (retval == 0) {
2228                         if (retry_on_empty-- > 0) {
2229                                 goto more;
2230                         } else {
2231                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
2232                                         "imit reached\n");
2233                                 return -ENOMEM;
2234                         }
2235                 } else {
2236                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2237                         return -ENOMEM;
2238                 }
2239         }
2240         return -1;
2241 }
2242
2243 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2244 {
2245         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2246         if (UxxxStatus)
2247                 return UxxxStatus;
2248         if (ftdi->controlreg & 0x00400000) {
2249                 if (ftdi->card_ejected) {
2250                 } else {
2251                         ftdi->card_ejected = 1;
2252                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = "
2253                                 "%08X\n", ftdi->controlreg);
2254                 }
2255                 return -ENODEV;
2256         } else {
2257                 u8 fn = ftdi->function - 1;
2258                 int activePCIfn = fn << 8;
2259                 u32 pcidata;
2260                 u32 pciVID;
2261                 u32 pciPID;
2262                 int reg = 0;
2263                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2264                         &pcidata);
2265                 if (UxxxStatus)
2266                         return UxxxStatus;
2267                 pciVID = pcidata & 0xFFFF;
2268                 pciPID = (pcidata >> 16) & 0xFFFF;
2269                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2270                         ftdi->platform_data.device) {
2271                         return 0;
2272                 } else {
2273                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X devi"
2274                                 "ce=%04X pciPID=%04X\n",
2275                                 ftdi->platform_data.vendor, pciVID,
2276                                 ftdi->platform_data.device, pciPID);
2277                         return -ENODEV;
2278                 }
2279         }
2280 }
2281
2282
2283 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2284         offsetof(struct ohci_regs, member), 0, data);
2285 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2286         offsetof(struct ohci_regs, member), 0, data);
2287
2288 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2289 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2290         OHCI_INTR_WDH)
2291 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2292 {
2293         int devices = 0;
2294         int retval;
2295         u32 hc_control;
2296         int num_ports;
2297         u32 control;
2298         u32 rh_a = -1;
2299         u32 status;
2300         u32 fminterval;
2301         u32 hc_fminterval;
2302         u32 periodicstart;
2303         u32 cmdstatus;
2304         u32 roothub_a;
2305         int mask = OHCI_INTR_INIT;
2306         int sleep_time = 0;
2307         int reset_timeout = 30;        /* ... allow extra time */
2308         int temp;
2309         retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2310         if (retval)
2311                 return retval;
2312         retval = ftdi_read_pcimem(ftdi, control, &control);
2313         if (retval)
2314                 return retval;
2315         retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2316         if (retval)
2317                 return retval;
2318         num_ports = rh_a & RH_A_NDP;
2319         retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2320         if (retval)
2321                 return retval;
2322         hc_fminterval &= 0x3fff;
2323         if (hc_fminterval != FI) {
2324         }
2325         hc_fminterval |= FSMP(hc_fminterval) << 16;
2326         retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2327         if (retval)
2328                 return retval;
2329         switch (hc_control & OHCI_CTRL_HCFS) {
2330         case OHCI_USB_OPER:
2331                 sleep_time = 0;
2332                 break;
2333         case OHCI_USB_SUSPEND:
2334         case OHCI_USB_RESUME:
2335                 hc_control &= OHCI_CTRL_RWC;
2336                 hc_control |= OHCI_USB_RESUME;
2337                 sleep_time = 10;
2338                 break;
2339         default:
2340                 hc_control &= OHCI_CTRL_RWC;
2341                 hc_control |= OHCI_USB_RESET;
2342                 sleep_time = 50;
2343                 break;
2344         }
2345         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2346         if (retval)
2347                 return retval;
2348         retval = ftdi_read_pcimem(ftdi, control, &control);
2349         if (retval)
2350                 return retval;
2351         msleep(sleep_time);
2352         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2353         if (retval)
2354                 return retval;
2355         if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2356                 for (temp = 0; temp < num_ports; temp++) {
2357                         retval = ftdi_write_pcimem(ftdi,
2358                                 roothub.portstatus[temp], RH_PS_LSDA);
2359                         if (retval)
2360                                 return retval;
2361                 }
2362         }
2363         retval = ftdi_read_pcimem(ftdi, control, &control);
2364         if (retval)
2365                 return retval;
2366       retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2367         if (retval)
2368                 return retval;
2369         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2370         if (retval)
2371                 return retval;
2372       extra:{
2373                 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2374                 if (retval)
2375                         return retval;
2376                 if (0 != (status & OHCI_HCR)) {
2377                         if (--reset_timeout == 0) {
2378                                 dev_err(&ftdi->udev->dev, "USB HC reset timed o"
2379                                         "ut!\n");
2380                                 return -ENODEV;
2381                         } else {
2382                                 msleep(5);
2383                                 goto extra;
2384                         }
2385                 }
2386         }
2387         if (quirk & OHCI_QUIRK_INITRESET) {
2388                 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2389                 if (retval)
2390                         return retval;
2391                 retval = ftdi_read_pcimem(ftdi, control, &control);
2392                 if (retval)
2393                         return retval;
2394         }
2395         retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2396         if (retval)
2397                 return retval;
2398         retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2399         if (retval)
2400                 return retval;
2401         retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2402         if (retval)
2403                 return retval;
2404         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2405         if (retval)
2406                 return retval;
2407         retval = ftdi_write_pcimem(ftdi, fminterval,
2408                 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2409         if (retval)
2410                 return retval;
2411         retval = ftdi_write_pcimem(ftdi, periodicstart,
2412                 ((9 *hc_fminterval) / 10) & 0x3fff);
2413         if (retval)
2414                 return retval;
2415         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2416         if (retval)
2417                 return retval;
2418         retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2419         if (retval)
2420                 return retval;
2421         if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2422                 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2423                         quirk |= OHCI_QUIRK_INITRESET;
2424                         goto retry;
2425                 } else
2426                         dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2427                                 fminterval, periodicstart);
2428         }                        /* start controller operations */
2429         hc_control &= OHCI_CTRL_RWC;
2430         hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2431         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2432         if (retval)
2433                 return retval;
2434         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2435         if (retval)
2436                 return retval;
2437         retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2438         if (retval)
2439                 return retval;
2440         retval = ftdi_read_pcimem(ftdi, control, &control);
2441         if (retval)
2442                 return retval;
2443         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2444         if (retval)
2445                 return retval;
2446         retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2447         if (retval)
2448                 return retval;
2449         retval = ftdi_write_pcimem(ftdi, intrdisable,
2450                 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2451                 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2452                 OHCI_INTR_SO);
2453         if (retval)
2454                 return retval;        /* handle root hub init quirks ... */
2455         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2456         if (retval)
2457                 return retval;
2458         roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2459         if (quirk & OHCI_QUIRK_SUPERIO) {
2460                 roothub_a |= RH_A_NOCP;
2461                 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2462                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2463                 if (retval)
2464                         return retval;
2465         } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2466                 roothub_a |= RH_A_NPS;
2467                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2468                 if (retval)
2469                         return retval;
2470         }
2471         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2472         if (retval)
2473                 return retval;
2474         retval = ftdi_write_pcimem(ftdi, roothub.b,
2475                 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2476         if (retval)
2477                 return retval;
2478         retval = ftdi_read_pcimem(ftdi, control, &control);
2479         if (retval)
2480                 return retval;
2481         mdelay((roothub_a >> 23) & 0x1fe);
2482         for (temp = 0; temp < num_ports; temp++) {
2483                 u32 portstatus;
2484                 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2485                         &portstatus);
2486                 if (retval)
2487                         return retval;
2488                 if (1 & portstatus)
2489                         devices += 1;
2490         }
2491         return devices;
2492 }
2493
2494 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2495 {
2496         u32 latence_timer;
2497         int UxxxStatus;
2498         u32 pcidata;
2499         int reg = 0;
2500         int activePCIfn = fn << 8;
2501         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2502         if (UxxxStatus)
2503                 return UxxxStatus;
2504         reg = 16;
2505         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2506                 0xFFFFFFFF);
2507         if (UxxxStatus)
2508                 return UxxxStatus;
2509         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2510                 &pcidata);
2511         if (UxxxStatus)
2512                 return UxxxStatus;
2513         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2514                 0xF0000000);
2515         if (UxxxStatus)
2516                 return UxxxStatus;
2517         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2518                 &pcidata);
2519         if (UxxxStatus)
2520                 return UxxxStatus;
2521         reg = 12;
2522         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2523                 &latence_timer);
2524         if (UxxxStatus)
2525                 return UxxxStatus;
2526         latence_timer &= 0xFFFF00FF;
2527         latence_timer |= 0x00001600;
2528         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2529                 latence_timer);
2530         if (UxxxStatus)
2531                 return UxxxStatus;
2532         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2533                 &pcidata);
2534         if (UxxxStatus)
2535                 return UxxxStatus;
2536         reg = 4;
2537         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2538                 0x06);
2539         if (UxxxStatus)
2540                 return UxxxStatus;
2541         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2542                 &pcidata);
2543         if (UxxxStatus)
2544                 return UxxxStatus;
2545         for (reg = 0; reg <= 0x54; reg += 4) {
2546                 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2547                 if (UxxxStatus)
2548                         return UxxxStatus;
2549         }
2550         return 0;
2551 }
2552
2553 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2554 {
2555         u32 latence_timer;
2556         int UxxxStatus;
2557         u32 pcidata;
2558         int reg = 0;
2559         int activePCIfn = fn << 8;
2560         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2561         if (UxxxStatus)
2562                 return UxxxStatus;
2563         reg = 16;
2564         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2565                 0xFFFFFFFF);
2566         if (UxxxStatus)
2567                 return UxxxStatus;
2568         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2569                 &pcidata);
2570         if (UxxxStatus)
2571                 return UxxxStatus;
2572         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2573                 0x00000000);
2574         if (UxxxStatus)
2575                 return UxxxStatus;
2576         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2577                 &pcidata);
2578         if (UxxxStatus)
2579                 return UxxxStatus;
2580         reg = 12;
2581         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2582                 &latence_timer);
2583         if (UxxxStatus)
2584                 return UxxxStatus;
2585         latence_timer &= 0xFFFF00FF;
2586         latence_timer |= 0x00001600;
2587         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2588                 latence_timer);
2589         if (UxxxStatus)
2590                 return UxxxStatus;
2591         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2592                 &pcidata);
2593         if (UxxxStatus)
2594                 return UxxxStatus;
2595         reg = 4;
2596         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2597                 0x00);
2598         if (UxxxStatus)
2599                 return UxxxStatus;
2600         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2601                 &pcidata);
2602         if (UxxxStatus)
2603                 return UxxxStatus;
2604         return 0;
2605 }
2606
2607 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2608 {
2609         int result;
2610         int UxxxStatus;
2611         UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2612         if (UxxxStatus)
2613                 return UxxxStatus;
2614         result = ftdi_elan_check_controller(ftdi, quirk);
2615         UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2616         if (UxxxStatus)
2617                 return UxxxStatus;
2618         return result;
2619 }
2620
2621 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2622 {
2623         u32 controlreg;
2624         u8 sensebits;
2625         int UxxxStatus;
2626         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2627         if (UxxxStatus)
2628                 return UxxxStatus;
2629         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2630         if (UxxxStatus)
2631                 return UxxxStatus;
2632         msleep(750);
2633         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2634         if (UxxxStatus)
2635                 return UxxxStatus;
2636         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2637         if (UxxxStatus)
2638                 return UxxxStatus;
2639         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2640         if (UxxxStatus)
2641                 return UxxxStatus;
2642         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2643         if (UxxxStatus)
2644                 return UxxxStatus;
2645         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2646         if (UxxxStatus)
2647                 return UxxxStatus;
2648         msleep(250);
2649         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2650         if (UxxxStatus)
2651                 return UxxxStatus;
2652         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2653         if (UxxxStatus)
2654                 return UxxxStatus;
2655         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2656         if (UxxxStatus)
2657                 return UxxxStatus;
2658         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2659         if (UxxxStatus)
2660                 return UxxxStatus;
2661         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2662         if (UxxxStatus)
2663                 return UxxxStatus;
2664         msleep(1000);
2665         sensebits = (controlreg >> 16) & 0x000F;
2666         if (0x0D == sensebits)
2667                 return 0;
2668         else
2669                 return - ENXIO;
2670 }
2671
2672 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2673 {
2674         int UxxxStatus;
2675         u32 pcidata;
2676         int reg = 0;
2677         u8 fn;
2678         int activePCIfn = 0;
2679         int max_devices = 0;
2680         int controllers = 0;
2681         int unrecognized = 0;
2682         ftdi->function = 0;
2683         for (fn = 0; (fn < 4); fn++) {
2684                 u32 pciVID = 0;
2685                 u32 pciPID = 0;
2686                 int devices = 0;
2687                 activePCIfn = fn << 8;
2688                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2689                         &pcidata);
2690                 if (UxxxStatus)
2691                         return UxxxStatus;
2692                 pciVID = pcidata & 0xFFFF;
2693                 pciPID = (pcidata >> 16) & 0xFFFF;
2694                 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2695                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2696                         controllers += 1;
2697                 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2698                         {
2699                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2700                         controllers += 1;
2701                 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2702                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2703                         controllers += 1;
2704                 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2705                         {
2706                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2707                         controllers += 1;
2708                 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2709                         devices = ftdi_elan_found_controller(ftdi, fn,
2710                                 OHCI_QUIRK_AMD756);
2711                         controllers += 1;
2712                 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2713                         devices = ftdi_elan_found_controller(ftdi, fn,
2714                                 OHCI_QUIRK_ZFMICRO);
2715                         controllers += 1;
2716                 } else if (0 == pcidata) {
2717                 } else
2718                         unrecognized += 1;
2719                 if (devices > max_devices) {
2720                         max_devices = devices;
2721                         ftdi->function = fn + 1;
2722                         ftdi->platform_data.vendor = pciVID;
2723                         ftdi->platform_data.device = pciPID;
2724                 }
2725         }
2726         if (ftdi->function > 0) {
2727                 UxxxStatus = ftdi_elan_setup_controller(ftdi,
2728                         ftdi->function - 1);
2729                 if (UxxxStatus)
2730                         return UxxxStatus;
2731                 return 0;
2732         } else if (controllers > 0) {
2733                 return -ENXIO;
2734         } else if (unrecognized > 0) {
2735                 return -ENXIO;
2736         } else {
2737                 ftdi->enumerated = 0;
2738                 return -ENXIO;
2739         }
2740 }
2741
2742
2743 /*
2744 * we use only the first bulk-in and bulk-out endpoints
2745 */
2746 static int ftdi_elan_probe(struct usb_interface *interface,
2747         const struct usb_device_id *id)
2748 {
2749         struct usb_host_interface *iface_desc;
2750         struct usb_endpoint_descriptor *endpoint;
2751         size_t buffer_size;
2752         int i;
2753         int retval = -ENOMEM;
2754         struct usb_ftdi *ftdi;
2755
2756         ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2757         if (!ftdi) {
2758                 printk(KERN_ERR "Out of memory\n");
2759                 return -ENOMEM;
2760         }
2761
2762         mutex_lock(&ftdi_module_lock);
2763         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2764         ftdi->sequence_num = ++ftdi_instances;
2765         mutex_unlock(&ftdi_module_lock);
2766         ftdi_elan_init_kref(ftdi);
2767         init_MUTEX(&ftdi->sw_lock);
2768         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2769         ftdi->interface = interface;
2770         mutex_init(&ftdi->u132_lock);
2771         ftdi->expected = 4;
2772         iface_desc = interface->cur_altsetting;
2773         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2774                 endpoint = &iface_desc->endpoint[i].desc;
2775                 if (!ftdi->bulk_in_endpointAddr &&
2776                     usb_endpoint_is_bulk_in(endpoint)) {
2777                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2778                         ftdi->bulk_in_size = buffer_size;
2779                         ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2780                         ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2781                         if (!ftdi->bulk_in_buffer) {
2782                                 dev_err(&ftdi->udev->dev, "Could not allocate b"
2783                                         "ulk_in_buffer\n");
2784                                 retval = -ENOMEM;
2785                                 goto error;
2786                         }
2787                 }
2788                 if (!ftdi->bulk_out_endpointAddr &&
2789                     usb_endpoint_is_bulk_out(endpoint)) {
2790                         ftdi->bulk_out_endpointAddr =
2791                                 endpoint->bEndpointAddress;
2792                 }
2793         }
2794         if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2795                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk"
2796                         "-out endpoints\n");
2797                 retval = -ENODEV;
2798                 goto error;
2799         }
2800         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2801                 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2802                 ftdi->bulk_out_endpointAddr);
2803         usb_set_intfdata(interface, ftdi);
2804         if (iface_desc->desc.bInterfaceNumber == 0 &&
2805                 ftdi->bulk_in_endpointAddr == 0x81 &&
2806                 ftdi->bulk_out_endpointAddr == 0x02) {
2807                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2808                 if (retval) {
2809                         dev_err(&ftdi->udev->dev, "Not able to get a minor for "
2810                                 "this device.\n");
2811                         usb_set_intfdata(interface, NULL);
2812                         retval = -ENOMEM;
2813                         goto error;
2814                 } else {
2815                         ftdi->class = &ftdi_elan_jtag_class;
2816                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface "
2817                                 "%d now attached to ftdi%d\n", ftdi,
2818                                 iface_desc->desc.bInterfaceNumber,
2819                                 interface->minor);
2820                         return 0;
2821                 }
2822         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2823                 ftdi->bulk_in_endpointAddr == 0x83 &&
2824                 ftdi->bulk_out_endpointAddr == 0x04) {
2825                 ftdi->class = NULL;
2826                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now a"
2827                         "ctivated\n", ftdi, iface_desc->desc.bInterfaceNumber);
2828                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2829                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2830                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2831                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2832                 return 0;
2833         } else {
2834                 dev_err(&ftdi->udev->dev,
2835                         "Could not find ELAN's U132 device\n");
2836                 retval = -ENODEV;
2837                 goto error;
2838         }
2839       error:if (ftdi) {
2840                 ftdi_elan_put_kref(ftdi);
2841         }
2842         return retval;
2843 }
2844
2845 static void ftdi_elan_disconnect(struct usb_interface *interface)
2846 {
2847         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2848         ftdi->disconnected += 1;
2849         if (ftdi->class) {
2850                 int minor = interface->minor;
2851                 struct usb_class_driver *class = ftdi->class;
2852                 usb_set_intfdata(interface, NULL);
2853                 usb_deregister_dev(interface, class);
2854                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on min"
2855                         "or %d now disconnected\n", minor);
2856         } else {
2857                 ftdi_status_cancel_work(ftdi);
2858                 ftdi_command_cancel_work(ftdi);
2859                 ftdi_response_cancel_work(ftdi);
2860                 ftdi_elan_abandon_completions(ftdi);
2861                 ftdi_elan_abandon_targets(ftdi);
2862                 if (ftdi->registered) {
2863                         platform_device_unregister(&ftdi->platform_dev);
2864                         ftdi->synchronized = 0;
2865                         ftdi->enumerated = 0;
2866                         ftdi->initialized = 0;
2867                         ftdi->registered = 0;
2868                 }
2869                 flush_workqueue(status_queue);
2870                 flush_workqueue(command_queue);
2871                 flush_workqueue(respond_queue);
2872                 ftdi->disconnected += 1;
2873                 usb_set_intfdata(interface, NULL);
2874                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller inter"
2875                         "face now disconnected\n");
2876         }
2877         ftdi_elan_put_kref(ftdi);
2878 }
2879
2880 static struct usb_driver ftdi_elan_driver = {
2881         .name = "ftdi-elan",
2882         .probe = ftdi_elan_probe,
2883         .disconnect = ftdi_elan_disconnect,
2884         .id_table = ftdi_elan_table,
2885 };
2886 static int __init ftdi_elan_init(void)
2887 {
2888         int result;
2889         printk(KERN_INFO "driver %s built at %s on %s\n", ftdi_elan_driver.name,
2890                __TIME__, __DATE__);
2891         mutex_init(&ftdi_module_lock);
2892         INIT_LIST_HEAD(&ftdi_static_list);
2893         status_queue = create_singlethread_workqueue("ftdi-status-control");
2894         if (!status_queue)
2895                 goto err_status_queue;
2896         command_queue = create_singlethread_workqueue("ftdi-command-engine");
2897         if (!command_queue)
2898                 goto err_command_queue;
2899         respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2900         if (!respond_queue)
2901                 goto err_respond_queue;
2902         result = usb_register(&ftdi_elan_driver);
2903         if (result) {
2904                 destroy_workqueue(status_queue);
2905                 destroy_workqueue(command_queue);
2906                 destroy_workqueue(respond_queue);
2907                 printk(KERN_ERR "usb_register failed. Error number %d\n",
2908                        result);
2909         }
2910         return result;
2911
2912  err_respond_queue:
2913         destroy_workqueue(command_queue);
2914  err_command_queue:
2915         destroy_workqueue(status_queue);
2916  err_status_queue:
2917         printk(KERN_ERR "%s couldn't create workqueue\n", ftdi_elan_driver.name);
2918         return -ENOMEM;
2919 }
2920
2921 static void __exit ftdi_elan_exit(void)
2922 {
2923         struct usb_ftdi *ftdi;
2924         struct usb_ftdi *temp;
2925         usb_deregister(&ftdi_elan_driver);
2926         printk(KERN_INFO "ftdi_u132 driver deregistered\n");
2927         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2928                 ftdi_status_cancel_work(ftdi);
2929                 ftdi_command_cancel_work(ftdi);
2930                 ftdi_response_cancel_work(ftdi);
2931         } flush_workqueue(status_queue);
2932         destroy_workqueue(status_queue);
2933         status_queue = NULL;
2934         flush_workqueue(command_queue);
2935         destroy_workqueue(command_queue);
2936         command_queue = NULL;
2937         flush_workqueue(respond_queue);
2938         destroy_workqueue(respond_queue);
2939         respond_queue = NULL;
2940 }
2941
2942
2943 module_init(ftdi_elan_init);
2944 module_exit(ftdi_elan_exit);