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