drivers/usb/misc/ftdi-elan.c

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