git.oblomov.eu Git - linux-2.6/blob - drivers/usb/misc/ftdi-elan.c

   1 /*
   2 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
   3 *
   4 * Copyright(C) 2006 Elan Digital Systems Limited
   5 * http://www.elandigitalsystems.com
   6 *
   7 * Author and Maintainer - Tony Olech - Elan Digital Systems
   8 * tony.olech@elandigitalsystems.com
   9 *
  10 * This program is free software;you can redistribute it and/or
  11 * modify it under the terms of the GNU General Public License as
  12 * published by the Free Software Foundation, version 2.
  13 *
  14 *
  15 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
  16 * based on various USB client drivers in the 2.6.15 linux kernel
  17 * with constant reference to the 3rd Edition of Linux Device Drivers
  18 * published by O'Reilly
  19 *
  20 * The U132 adapter is a USB to CardBus adapter specifically designed
  21 * for PC cards that contain an OHCI host controller. Typical PC cards
  22 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
  23 *
  24 * The U132 adapter will *NOT *work with PC cards that do not contain
  25 * an OHCI controller. A simple way to test whether a PC card has an
  26 * OHCI controller as an interface is to insert the PC card directly
  27 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
  28 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
  29 * then there is a good chance that the U132 adapter will support the
  30 * PC card.(you also need the specific client driver for the PC card)
  31 *
  32 * Please inform the Author and Maintainer about any PC cards that
  33 * contain OHCI Host Controller and work when directly connected to
  34 * an embedded CardBus slot but do not work when they are connected
  35 * via an ELAN U132 adapter.
  36 *
  37 */
  38 #include <linux/kernel.h>
  39 #include <linux/errno.h>
  40 #include <linux/init.h>
  41 #include <linux/list.h>
  42 #include <linux/ioctl.h>
  43 #include <linux/pci_ids.h>
  44 #include <linux/slab.h>
  45 #include <linux/module.h>
  46 #include <linux/kref.h>
  47 #include <linux/mutex.h>
  48 #include <asm/uaccess.h>
  49 #include <linux/usb.h>
  50 #include <linux/workqueue.h>
  51 #include <linux/platform_device.h>
  52 MODULE_AUTHOR("Tony Olech");
  53 MODULE_DESCRIPTION("FTDI ELAN driver");
  54 MODULE_LICENSE("GPL");
  55 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
  56 static int distrust_firmware = 1;
  57 module_param(distrust_firmware, bool, 0);
  58 MODULE_PARM_DESC(distrust_firmware, "true to distrust firmware power/overcurren"
  59         "t setup");
  60 extern struct platform_driver u132_platform_driver;
  61 static struct workqueue_struct *status_queue;
  62 static struct workqueue_struct *command_queue;
  63 static struct workqueue_struct *respond_queue;
  64 /*
  65 * ftdi_module_lock exists to protect access to global variables
  66 *
  67 */
  68 static struct mutex ftdi_module_lock;
  69 static int ftdi_instances = 0;
  70 static struct list_head ftdi_static_list;
  71 /*
  72 * end of the global variables protected by ftdi_module_lock
  73 */
  74 #include "usb_u132.h"
  75 #include <asm/io.h>
  76 #include "../core/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 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 recieved;
 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->recieved = 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->recieved = 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->recieved = 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         return;
 460 }
 461
 462 static void ftdi_elan_command_work(struct work_struct *work)
 463 {
 464         struct usb_ftdi *ftdi =
 465                 container_of(work, struct usb_ftdi, command_work.work);
 466
 467         if (ftdi->disconnected > 0) {
 468                 ftdi_elan_put_kref(ftdi);
 469                 return;
 470         } else {
 471                 int retval = ftdi_elan_command_engine(ftdi);
 472                 if (retval == -ESHUTDOWN) {
 473                         ftdi->disconnected += 1;
 474                 } else if (retval == -ENODEV) {
 475                         ftdi->disconnected += 1;
 476                 } else if (retval)
 477                         dev_err(&ftdi->udev->dev, "command error %d\n", retval);
 478                 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
 479                 return;
 480         }
 481 }
 482
 483 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
 484 {
 485         ftdi_respond_queue_work(ftdi, 0);
 486         return;
 487 }
 488
 489 static void ftdi_elan_respond_work(struct work_struct *work)
 490 {
 491         struct usb_ftdi *ftdi =
 492                 container_of(work, struct usb_ftdi, respond_work.work);
 493         if (ftdi->disconnected > 0) {
 494                 ftdi_elan_put_kref(ftdi);
 495                 return;
 496         } else {
 497                 int retval = ftdi_elan_respond_engine(ftdi);
 498                 if (retval == 0) {
 499                 } else if (retval == -ESHUTDOWN) {
 500                         ftdi->disconnected += 1;
 501                 } else if (retval == -ENODEV) {
 502                         ftdi->disconnected += 1;
 503                 } else if (retval == -EILSEQ) {
 504                         ftdi->disconnected += 1;
 505                 } else {
 506                         ftdi->disconnected += 1;
 507                         dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
 508                 }
 509                 if (ftdi->disconnected > 0) {
 510                         ftdi_elan_abandon_completions(ftdi);
 511                         ftdi_elan_abandon_targets(ftdi);
 512                 }
 513                 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
 514                 return;
 515         }
 516 }
 517
 518
 519 /*
 520 * the sw_lock is initially held and will be freed
 521 * after the FTDI has been synchronized
 522 *
 523 */
 524 static void ftdi_elan_status_work(struct work_struct *work)
 525 {
 526         struct usb_ftdi *ftdi =
 527                 container_of(work, struct usb_ftdi, status_work.work);
 528         int work_delay_in_msec = 0;
 529         if (ftdi->disconnected > 0) {
 530                 ftdi_elan_put_kref(ftdi);
 531                 return;
 532         } else if (ftdi->synchronized == 0) {
 533                 down(&ftdi->sw_lock);
 534                 if (ftdi_elan_synchronize(ftdi) == 0) {
 535                         ftdi->synchronized = 1;
 536                         ftdi_command_queue_work(ftdi, 1);
 537                         ftdi_respond_queue_work(ftdi, 1);
 538                         up(&ftdi->sw_lock);
 539                         work_delay_in_msec = 100;
 540                 } else {
 541                         dev_err(&ftdi->udev->dev, "synchronize failed\n");
 542                         up(&ftdi->sw_lock);
 543                         work_delay_in_msec = 10 *1000;
 544                 }
 545         } else if (ftdi->stuck_status > 0) {
 546                 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
 547                         ftdi->stuck_status = 0;
 548                         ftdi->synchronized = 0;
 549                 } else if ((ftdi->stuck_status++ % 60) == 1) {
 550                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
 551                                 "- please remove\n");
 552                 } else
 553                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
 554                                 "- checked %d times\n", ftdi->stuck_status);
 555                 work_delay_in_msec = 100;
 556         } else if (ftdi->enumerated == 0) {
 557                 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
 558                         ftdi->enumerated = 1;
 559                         work_delay_in_msec = 250;
 560                 } else
 561                         work_delay_in_msec = 1000;
 562         } else if (ftdi->initialized == 0) {
 563                 if (ftdi_elan_setupOHCI(ftdi) == 0) {
 564                         ftdi->initialized = 1;
 565                         work_delay_in_msec = 500;
 566                 } else {
 567                         dev_err(&ftdi->udev->dev, "initialized failed - trying "
 568                                 "again in 10 seconds\n");
 569                         work_delay_in_msec = 1 *1000;
 570                 }
 571         } else if (ftdi->registered == 0) {
 572                 work_delay_in_msec = 10;
 573                 if (ftdi_elan_hcd_init(ftdi) == 0) {
 574                         ftdi->registered = 1;
 575                 } else
 576                         dev_err(&ftdi->udev->dev, "register failed\n");
 577                 work_delay_in_msec = 250;
 578         } else {
 579                 if (ftdi_elan_checkingPCI(ftdi) == 0) {
 580                         work_delay_in_msec = 250;
 581                 } else if (ftdi->controlreg & 0x00400000) {
 582                         if (ftdi->gone_away > 0) {
 583                                 dev_err(&ftdi->udev->dev, "PCI device eject con"
 584                                         "firmed platform_dev.dev.parent=%p plat"
 585                                         "form_dev.dev=%p\n",
 586                                         ftdi->platform_dev.dev.parent,
 587                                         &ftdi->platform_dev.dev);
 588                                 platform_device_unregister(&ftdi->platform_dev);
 589                                 ftdi->platform_dev.dev.parent = NULL;
 590                                 ftdi->registered = 0;
 591                                 ftdi->enumerated = 0;
 592                                 ftdi->card_ejected = 0;
 593                                 ftdi->initialized = 0;
 594                                 ftdi->gone_away = 0;
 595                         } else
 596                                 ftdi_elan_flush_targets(ftdi);
 597                         work_delay_in_msec = 250;
 598                 } else {
 599                         dev_err(&ftdi->udev->dev, "PCI device has disappeared\n"
 600                                 );
 601                         ftdi_elan_cancel_targets(ftdi);
 602                         work_delay_in_msec = 500;
 603                         ftdi->enumerated = 0;
 604                         ftdi->initialized = 0;
 605                 }
 606         }
 607         if (ftdi->disconnected > 0) {
 608                 ftdi_elan_put_kref(ftdi);
 609                 return;
 610         } else {
 611                 ftdi_status_requeue_work(ftdi,
 612                         msecs_to_jiffies(work_delay_in_msec));
 613                 return;
 614         }
 615 }
 616
 617
 618 /*
 619 * file_operations for the jtag interface
 620 *
 621 * the usage count for the device is incremented on open()
 622 * and decremented on release()
 623 */
 624 static int ftdi_elan_open(struct inode *inode, struct file *file)
 625 {
 626         int subminor = iminor(inode);
 627         struct usb_interface *interface = usb_find_interface(&ftdi_elan_driver,
 628                 subminor);
 629         if (!interface) {
 630                 printk(KERN_ERR "can't find device for minor %d\n", subminor);
 631                 return -ENODEV;
 632         } else {
 633                 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
 634                 if (!ftdi) {
 635                         return -ENODEV;
 636                 } else {
 637                         if (down_interruptible(&ftdi->sw_lock)) {
 638                                 return -EINTR;
 639                         } else {
 640                                 ftdi_elan_get_kref(ftdi);
 641                                 file->private_data = ftdi;
 642                                 return 0;
 643                         }
 644                 }
 645         }
 646 }
 647
 648 static int ftdi_elan_release(struct inode *inode, struct file *file)
 649 {
 650         struct usb_ftdi *ftdi = (struct usb_ftdi *)file->private_data;
 651         if (ftdi == NULL)
 652                 return -ENODEV;
 653         up(&ftdi->sw_lock);        /* decrement the count on our device */
 654         ftdi_elan_put_kref(ftdi);
 655         return 0;
 656 }
 657
 658
 659 /*
 660 *
 661 * blocking bulk reads are used to get data from the device
 662 *
 663 */
 664 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 665                               size_t count, loff_t *ppos)
 666 {
 667         char data[30 *3 + 4];
 668         char *d = data;
 669         int m = (sizeof(data) - 1) / 3;
 670         int bytes_read = 0;
 671         int retry_on_empty = 10;
 672         int retry_on_timeout = 5;
 673         struct usb_ftdi *ftdi = (struct usb_ftdi *)file->private_data;
 674         if (ftdi->disconnected > 0) {
 675                 return -ENODEV;
 676         }
 677         data[0] = 0;
 678       have:if (ftdi->bulk_in_left > 0) {
 679                 if (count-- > 0) {
 680                         char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 681                         ftdi->bulk_in_left -= 1;
 682                         if (bytes_read < m) {
 683                                 d += sprintf(d, " %02X", 0x000000FF & *p);
 684                         } else if (bytes_read > m) {
 685                         } else
 686                                 d += sprintf(d, " ..");
 687                         if (copy_to_user(buffer++, p, 1)) {
 688                                 return -EFAULT;
 689                         } else {
 690                                 bytes_read += 1;
 691                                 goto have;
 692                         }
 693                 } else
 694                         return bytes_read;
 695         }
 696       more:if (count > 0) {
 697                 int packet_bytes = 0;
 698                 int retval = usb_bulk_msg(ftdi->udev,
 699                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 700                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 701                         &packet_bytes, msecs_to_jiffies(50));
 702                 if (packet_bytes > 2) {
 703                         ftdi->bulk_in_left = packet_bytes - 2;
 704                         ftdi->bulk_in_last = 1;
 705                         goto have;
 706                 } else if (retval == -ETIMEDOUT) {
 707                         if (retry_on_timeout-- > 0) {
 708                                 goto more;
 709                         } else if (bytes_read > 0) {
 710                                 return bytes_read;
 711                         } else
 712                                 return retval;
 713                 } else if (retval == 0) {
 714                         if (retry_on_empty-- > 0) {
 715                                 goto more;
 716                         } else
 717                                 return bytes_read;
 718                 } else
 719                         return retval;
 720         } else
 721                 return bytes_read;
 722 }
 723
 724 static void ftdi_elan_write_bulk_callback(struct urb *urb)
 725 {
 726         struct usb_ftdi *ftdi = urb->context;
 727         int status = urb->status;
 728
 729         if (status && !(status == -ENOENT || status == -ECONNRESET ||
 730             status == -ESHUTDOWN)) {
 731                 dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %"
 732                         "d\n", urb, status);
 733         }
 734         usb_buffer_free(urb->dev, urb->transfer_buffer_length,
 735                 urb->transfer_buffer, urb->transfer_dma);
 736 }
 737
 738 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 739         char *buf, int command_size, int total_size)
 740 {
 741         int ed_commands = 0;
 742         int b = 0;
 743         int I = command_size;
 744         int i = ftdi->command_head;
 745         while (I-- > 0) {
 746                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 747                         i++];
 748                 int F = command->follows;
 749                 u8 *f = command->buffer;
 750                 if (command->header & 0x80) {
 751                         ed_commands |= 1 << (0x3 & (command->header >> 5));
 752                 }
 753                 buf[b++] = command->header;
 754                 buf[b++] = (command->length >> 0) & 0x00FF;
 755                 buf[b++] = (command->length >> 8) & 0x00FF;
 756                 buf[b++] = command->address;
 757                 buf[b++] = command->width;
 758                 while (F-- > 0) {
 759                         buf[b++] = *f++;
 760                 }
 761         }
 762         return ed_commands;
 763 }
 764
 765 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 766 {
 767         int total_size = 0;
 768         int I = command_size;
 769         int i = ftdi->command_head;
 770         while (I-- > 0) {
 771                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 772                         i++];
 773                 total_size += 5 + command->follows;
 774         } return total_size;
 775 }
 776
 777 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 778 {
 779         int retval;
 780         char *buf;
 781         int ed_commands;
 782         int total_size;
 783         struct urb *urb;
 784         int command_size = ftdi->command_next - ftdi->command_head;
 785         if (command_size == 0)
 786                 return 0;
 787         total_size = ftdi_elan_total_command_size(ftdi, command_size);
 788         urb = usb_alloc_urb(0, GFP_KERNEL);
 789         if (!urb) {
 790                 dev_err(&ftdi->udev->dev, "could not get a urb to write %d comm"
 791                         "ands totaling %d bytes to the Uxxx\n", command_size,
 792                         total_size);
 793                 return -ENOMEM;
 794         }
 795         buf = usb_buffer_alloc(ftdi->udev, total_size, GFP_KERNEL,
 796                 &urb->transfer_dma);
 797         if (!buf) {
 798                 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d c"
 799                         "ommands totaling %d bytes to the Uxxx\n", command_size,
 800                          total_size);
 801                 usb_free_urb(urb);
 802                 return -ENOMEM;
 803         }
 804         ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 805                 command_size, total_size);
 806         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 807                 ftdi->bulk_out_endpointAddr), buf, total_size,
 808                 ftdi_elan_write_bulk_callback, ftdi);
 809         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 810         if (ed_commands) {
 811                 char diag[40 *3 + 4];
 812                 char *d = diag;
 813                 int m = total_size;
 814                 u8 *c = buf;
 815                 int s = (sizeof(diag) - 1) / 3;
 816                 diag[0] = 0;
 817                 while (s-- > 0 && m-- > 0) {
 818                         if (s > 0 || m == 0) {
 819                                 d += sprintf(d, " %02X", *c++);
 820                         } else
 821                                 d += sprintf(d, " ..");
 822                 }
 823         }
 824         retval = usb_submit_urb(urb, GFP_KERNEL);
 825         if (retval) {
 826                 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write "
 827                         "%d commands totaling %d bytes to the Uxxx\n", retval,
 828                         urb, command_size, total_size);
 829                 usb_buffer_free(ftdi->udev, total_size, buf, urb->transfer_dma);
 830                 usb_free_urb(urb);
 831                 return retval;
 832         }
 833         usb_free_urb(urb);        /* release our reference to this urb,
 834                 the USB core will eventually free it entirely */
 835         ftdi->command_head += command_size;
 836         ftdi_elan_kick_respond_queue(ftdi);
 837         return 0;
 838 }
 839
 840 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 841         struct u132_target *target, u8 *buffer, int length)
 842 {
 843         struct urb *urb = target->urb;
 844         int halted = target->halted;
 845         int skipped = target->skipped;
 846         int actual = target->actual;
 847         int non_null = target->non_null;
 848         int toggle_bits = target->toggle_bits;
 849         int error_count = target->error_count;
 850         int condition_code = target->condition_code;
 851         int repeat_number = target->repeat_number;
 852         void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 853                 int, int, int, int) = target->callback;
 854         target->active -= 1;
 855         target->callback = NULL;
 856         (*callback) (target->endp, urb, buffer, length, toggle_bits,
 857                 error_count, condition_code, repeat_number, halted, skipped,
 858                 actual, non_null);
 859 }
 860
 861 static char *have_ed_set_response(struct usb_ftdi *ftdi,
 862         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 863         char *b)
 864 {
 865         int payload = (ed_length >> 0) & 0x07FF;
 866         mutex_lock(&ftdi->u132_lock);
 867         target->actual = 0;
 868         target->non_null = (ed_length >> 15) & 0x0001;
 869         target->repeat_number = (ed_length >> 11) & 0x000F;
 870         if (ed_type == 0x02) {
 871                 if (payload == 0 || target->abandoning > 0) {
 872                         target->abandoning = 0;
 873                         mutex_unlock(&ftdi->u132_lock);
 874                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 875                                 payload);
 876                         ftdi->recieved = 0;
 877                         ftdi->expected = 4;
 878                         ftdi->ed_found = 0;
 879                         return ftdi->response;
 880                 } else {
 881                         ftdi->expected = 4 + payload;
 882                         ftdi->ed_found = 1;
 883                         mutex_unlock(&ftdi->u132_lock);
 884                         return b;
 885                 }
 886         } else if (ed_type == 0x03) {
 887                 if (payload == 0 || target->abandoning > 0) {
 888                         target->abandoning = 0;
 889                         mutex_unlock(&ftdi->u132_lock);
 890                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 891                                 payload);
 892                         ftdi->recieved = 0;
 893                         ftdi->expected = 4;
 894                         ftdi->ed_found = 0;
 895                         return ftdi->response;
 896                 } else {
 897                         ftdi->expected = 4 + payload;
 898                         ftdi->ed_found = 1;
 899                         mutex_unlock(&ftdi->u132_lock);
 900                         return b;
 901                 }
 902         } else if (ed_type == 0x01) {
 903                 target->abandoning = 0;
 904                 mutex_unlock(&ftdi->u132_lock);
 905                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 906                         payload);
 907                 ftdi->recieved = 0;
 908                 ftdi->expected = 4;
 909                 ftdi->ed_found = 0;
 910                 return ftdi->response;
 911         } else {
 912                 target->abandoning = 0;
 913                 mutex_unlock(&ftdi->u132_lock);
 914                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 915                         payload);
 916                 ftdi->recieved = 0;
 917                 ftdi->expected = 4;
 918                 ftdi->ed_found = 0;
 919                 return ftdi->response;
 920         }
 921 }
 922
 923 static char *have_ed_get_response(struct usb_ftdi *ftdi,
 924         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 925         char *b)
 926 {
 927         mutex_lock(&ftdi->u132_lock);
 928         target->condition_code = TD_DEVNOTRESP;
 929         target->actual = (ed_length >> 0) & 0x01FF;
 930         target->non_null = (ed_length >> 15) & 0x0001;
 931         target->repeat_number = (ed_length >> 11) & 0x000F;
 932         mutex_unlock(&ftdi->u132_lock);
 933         if (target->active)
 934                 ftdi_elan_do_callback(ftdi, target, NULL, 0);
 935         target->abandoning = 0;
 936         ftdi->recieved = 0;
 937         ftdi->expected = 4;
 938         ftdi->ed_found = 0;
 939         return ftdi->response;
 940 }
 941
 942
 943 /*
 944 * The engine tries to empty the FTDI fifo
 945 *
 946 * all responses found in the fifo data are dispatched thus
 947 * the response buffer can only ever hold a maximum sized
 948 * response from the Uxxx.
 949 *
 950 */
 951 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 952 {
 953         u8 *b = ftdi->response + ftdi->recieved;
 954         int bytes_read = 0;
 955         int retry_on_empty = 1;
 956         int retry_on_timeout = 3;
 957         int empty_packets = 0;
 958       read:{
 959                 int packet_bytes = 0;
 960                 int retval = usb_bulk_msg(ftdi->udev,
 961                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 962                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 963                         &packet_bytes, msecs_to_jiffies(500));
 964                 char diag[30 *3 + 4];
 965                 char *d = diag;
 966                 int m = packet_bytes;
 967                 u8 *c = ftdi->bulk_in_buffer;
 968                 int s = (sizeof(diag) - 1) / 3;
 969                 diag[0] = 0;
 970                 while (s-- > 0 && m-- > 0) {
 971                         if (s > 0 || m == 0) {
 972                                 d += sprintf(d, " %02X", *c++);
 973                         } else
 974                                 d += sprintf(d, " ..");
 975                 }
 976                 if (packet_bytes > 2) {
 977                         ftdi->bulk_in_left = packet_bytes - 2;
 978                         ftdi->bulk_in_last = 1;
 979                         goto have;
 980                 } else if (retval == -ETIMEDOUT) {
 981                         if (retry_on_timeout-- > 0) {
 982                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
 983                                         "t_bytes = %d with total %d bytes%s\n",
 984                                         packet_bytes, bytes_read, diag);
 985                                 goto more;
 986                         } else if (bytes_read > 0) {
 987                                 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
 988                                         bytes_read, diag);
 989                                 return -ENOMEM;
 990                         } else {
 991                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
 992                                         "t_bytes = %d with total %d bytes%s\n",
 993                                         packet_bytes, bytes_read, diag);
 994                                 return -ENOMEM;
 995                         }
 996                 } else if (retval == -EILSEQ) {
 997                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
 998                                 " = %d with total %d bytes%s\n", retval,
 999                                 packet_bytes, bytes_read, diag);
1000                         return retval;
1001                 } else if (retval) {
1002                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1003                                 " = %d with total %d bytes%s\n", retval,
1004                                 packet_bytes, bytes_read, diag);
1005                         return retval;
1006                 } else if (packet_bytes == 2) {
1007                         unsigned char s0 = ftdi->bulk_in_buffer[0];
1008                         unsigned char s1 = ftdi->bulk_in_buffer[1];
1009                         empty_packets += 1;
1010                         if (s0 == 0x31 && s1 == 0x60) {
1011                                 if (retry_on_empty-- > 0) {
1012                                         goto more;
1013                                 } else
1014                                         return 0;
1015                         } else if (s0 == 0x31 && s1 == 0x00) {
1016                                 if (retry_on_empty-- > 0) {
1017                                         goto more;
1018                                 } else
1019                                         return 0;
1020                         } else {
1021                                 if (retry_on_empty-- > 0) {
1022                                         goto more;
1023                                 } else
1024                                         return 0;
1025                         }
1026                 } else if (packet_bytes == 1) {
1027                         if (retry_on_empty-- > 0) {
1028                                 goto more;
1029                         } else
1030                                 return 0;
1031                 } else {
1032                         if (retry_on_empty-- > 0) {
1033                                 goto more;
1034                         } else
1035                                 return 0;
1036                 }
1037         }
1038       more:{
1039                 goto read;
1040         }
1041       have:if (ftdi->bulk_in_left > 0) {
1042                 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1043                 bytes_read += 1;
1044                 ftdi->bulk_in_left -= 1;
1045                 if (ftdi->recieved == 0 && c == 0xFF) {
1046                         goto have;
1047                 } else
1048                         *b++ = c;
1049                 if (++ftdi->recieved < ftdi->expected) {
1050                         goto have;
1051                 } else if (ftdi->ed_found) {
1052                         int ed_number = (ftdi->response[0] >> 5) & 0x03;
1053                         u16 ed_length = (ftdi->response[2] << 8) |
1054                                 ftdi->response[1];
1055                         struct u132_target *target = &ftdi->target[ed_number];
1056                         int payload = (ed_length >> 0) & 0x07FF;
1057                         char diag[30 *3 + 4];
1058                         char *d = diag;
1059                         int m = payload;
1060                         u8 *c = 4 + ftdi->response;
1061                         int s = (sizeof(diag) - 1) / 3;
1062                         diag[0] = 0;
1063                         while (s-- > 0 && m-- > 0) {
1064                                 if (s > 0 || m == 0) {
1065                                         d += sprintf(d, " %02X", *c++);
1066                                 } else
1067                                         d += sprintf(d, " ..");
1068                         }
1069                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1070                                 payload);
1071                         ftdi->recieved = 0;
1072                         ftdi->expected = 4;
1073                         ftdi->ed_found = 0;
1074                         b = ftdi->response;
1075                         goto have;
1076                 } else if (ftdi->expected == 8) {
1077                         u8 buscmd;
1078                         int respond_head = ftdi->respond_head++;
1079                         struct u132_respond *respond = &ftdi->respond[
1080                                 RESPOND_MASK & respond_head];
1081                         u32 data = ftdi->response[7];
1082                         data <<= 8;
1083                         data |= ftdi->response[6];
1084                         data <<= 8;
1085                         data |= ftdi->response[5];
1086                         data <<= 8;
1087                         data |= ftdi->response[4];
1088                         *respond->value = data;
1089                         *respond->result = 0;
1090                         complete(&respond->wait_completion);
1091                         ftdi->recieved = 0;
1092                         ftdi->expected = 4;
1093                         ftdi->ed_found = 0;
1094                         b = ftdi->response;
1095                         buscmd = (ftdi->response[0] >> 0) & 0x0F;
1096                         if (buscmd == 0x00) {
1097                         } else if (buscmd == 0x02) {
1098                         } else if (buscmd == 0x06) {
1099                         } else if (buscmd == 0x0A) {
1100                         } else
1101                                 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) va"
1102                                         "lue = %08X\n", buscmd, data);
1103                         goto have;
1104                 } else {
1105                         if ((ftdi->response[0] & 0x80) == 0x00) {
1106                                 ftdi->expected = 8;
1107                                 goto have;
1108                         } else {
1109                                 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1110                                 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1111                                 u16 ed_length = (ftdi->response[2] << 8) |
1112                                         ftdi->response[1];
1113                                 struct u132_target *target = &ftdi->target[
1114                                         ed_number];
1115                                 target->halted = (ftdi->response[0] >> 3) &
1116                                         0x01;
1117                                 target->skipped = (ftdi->response[0] >> 2) &
1118                                         0x01;
1119                                 target->toggle_bits = (ftdi->response[3] >> 6)
1120                                         & 0x03;
1121                                 target->error_count = (ftdi->response[3] >> 4)
1122                                         & 0x03;
1123                                 target->condition_code = (ftdi->response[
1124                                         3] >> 0) & 0x0F;
1125                                 if ((ftdi->response[0] & 0x10) == 0x00) {
1126                                         b = have_ed_set_response(ftdi, target,
1127                                                 ed_length, ed_number, ed_type,
1128                                                 b);
1129                                         goto have;
1130                                 } else {
1131                                         b = have_ed_get_response(ftdi, target,
1132                                                 ed_length, ed_number, ed_type,
1133                                                 b);
1134                                         goto have;
1135                                 }
1136                         }
1137                 }
1138         } else
1139                 goto more;
1140 }
1141
1142
1143 /*
1144 * create a urb, and a buffer for it, and copy the data to the urb
1145 *
1146 */
1147 static ssize_t ftdi_elan_write(struct file *file,
1148                                const char __user *user_buffer, size_t count,
1149                                loff_t *ppos)
1150 {
1151         int retval = 0;
1152         struct urb *urb;
1153         char *buf;
1154         struct usb_ftdi *ftdi = file->private_data;
1155
1156         if (ftdi->disconnected > 0) {
1157                 return -ENODEV;
1158         }
1159         if (count == 0) {
1160                 goto exit;
1161         }
1162         urb = usb_alloc_urb(0, GFP_KERNEL);
1163         if (!urb) {
1164                 retval = -ENOMEM;
1165                 goto error_1;
1166         }
1167         buf = usb_buffer_alloc(ftdi->udev, count, GFP_KERNEL,
1168                 &urb->transfer_dma);
1169         if (!buf) {
1170                 retval = -ENOMEM;
1171                 goto error_2;
1172         }
1173         if (copy_from_user(buf, user_buffer, count)) {
1174                 retval = -EFAULT;
1175                 goto error_3;
1176         }
1177         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1178                 ftdi->bulk_out_endpointAddr), buf, count,
1179                 ftdi_elan_write_bulk_callback, ftdi);
1180         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1181         retval = usb_submit_urb(urb, GFP_KERNEL);
1182         if (retval) {
1183                 dev_err(&ftdi->udev->dev, "failed submitting write urb, error %"
1184                         "d\n", retval);
1185                 goto error_3;
1186         }
1187         usb_free_urb(urb);
1188
1189 exit:
1190         return count;
1191 error_3:
1192         usb_buffer_free(ftdi->udev, count, buf, urb->transfer_dma);
1193 error_2:
1194         usb_free_urb(urb);
1195 error_1:
1196         return retval;
1197 }
1198
1199 static const struct file_operations ftdi_elan_fops = {
1200         .owner = THIS_MODULE,
1201         .llseek = no_llseek,
1202         .read = ftdi_elan_read,
1203         .write = ftdi_elan_write,
1204         .open = ftdi_elan_open,
1205         .release = ftdi_elan_release,
1206 };
1207
1208 /*
1209 * usb class driver info in order to get a minor number from the usb core,
1210 * and to have the device registered with the driver core
1211 */
1212 static struct usb_class_driver ftdi_elan_jtag_class = {
1213         .name = "ftdi-%d-jtag",
1214         .fops = &ftdi_elan_fops,
1215         .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1216 };
1217
1218 /*
1219 * the following definitions are for the
1220 * ELAN FPGA state machgine processor that
1221 * lies on the other side of the FTDI chip
1222 */
1223 #define cPCIu132rd 0x0
1224 #define cPCIu132wr 0x1
1225 #define cPCIiord 0x2
1226 #define cPCIiowr 0x3
1227 #define cPCImemrd 0x6
1228 #define cPCImemwr 0x7
1229 #define cPCIcfgrd 0xA
1230 #define cPCIcfgwr 0xB
1231 #define cPCInull 0xF
1232 #define cU132cmd_status 0x0
1233 #define cU132flash 0x1
1234 #define cPIDsetup 0x0
1235 #define cPIDout 0x1
1236 #define cPIDin 0x2
1237 #define cPIDinonce 0x3
1238 #define cCCnoerror 0x0
1239 #define cCCcrc 0x1
1240 #define cCCbitstuff 0x2
1241 #define cCCtoggle 0x3
1242 #define cCCstall 0x4
1243 #define cCCnoresp 0x5
1244 #define cCCbadpid1 0x6
1245 #define cCCbadpid2 0x7
1246 #define cCCdataoverrun 0x8
1247 #define cCCdataunderrun 0x9
1248 #define cCCbuffoverrun 0xC
1249 #define cCCbuffunderrun 0xD
1250 #define cCCnotaccessed 0xF
1251 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1252 {
1253       wait:if (ftdi->disconnected > 0) {
1254                 return -ENODEV;
1255         } else {
1256                 int command_size;
1257                 mutex_lock(&ftdi->u132_lock);
1258                 command_size = ftdi->command_next - ftdi->command_head;
1259                 if (command_size < COMMAND_SIZE) {
1260                         struct u132_command *command = &ftdi->command[
1261                                 COMMAND_MASK & ftdi->command_next];
1262                         command->header = 0x00 | cPCIu132wr;
1263                         command->length = 0x04;
1264                         command->address = 0x00;
1265                         command->width = 0x00;
1266                         command->follows = 4;
1267                         command->value = data;
1268                         command->buffer = &command->value;
1269                         ftdi->command_next += 1;
1270                         ftdi_elan_kick_command_queue(ftdi);
1271                         mutex_unlock(&ftdi->u132_lock);
1272                         return 0;
1273                 } else {
1274                         mutex_unlock(&ftdi->u132_lock);
1275                         msleep(100);
1276                         goto wait;
1277                 }
1278         }
1279 }
1280
1281 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1282         u8 width, u32 data)
1283 {
1284         u8 addressofs = config_offset / 4;
1285       wait:if (ftdi->disconnected > 0) {
1286                 return -ENODEV;
1287         } else {
1288                 int command_size;
1289                 mutex_lock(&ftdi->u132_lock);
1290                 command_size = ftdi->command_next - ftdi->command_head;
1291                 if (command_size < COMMAND_SIZE) {
1292                         struct u132_command *command = &ftdi->command[
1293                                 COMMAND_MASK & ftdi->command_next];
1294                         command->header = 0x00 | (cPCIcfgwr & 0x0F);
1295                         command->length = 0x04;
1296                         command->address = addressofs;
1297                         command->width = 0x00 | (width & 0x0F);
1298                         command->follows = 4;
1299                         command->value = data;
1300                         command->buffer = &command->value;
1301                         ftdi->command_next += 1;
1302                         ftdi_elan_kick_command_queue(ftdi);
1303                         mutex_unlock(&ftdi->u132_lock);
1304                         return 0;
1305                 } else {
1306                         mutex_unlock(&ftdi->u132_lock);
1307                         msleep(100);
1308                         goto wait;
1309                 }
1310         }
1311 }
1312
1313 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1314         u8 width, u32 data)
1315 {
1316         u8 addressofs = mem_offset / 4;
1317       wait:if (ftdi->disconnected > 0) {
1318                 return -ENODEV;
1319         } else {
1320                 int command_size;
1321                 mutex_lock(&ftdi->u132_lock);
1322                 command_size = ftdi->command_next - ftdi->command_head;
1323                 if (command_size < COMMAND_SIZE) {
1324                         struct u132_command *command = &ftdi->command[
1325                                 COMMAND_MASK & ftdi->command_next];
1326                         command->header = 0x00 | (cPCImemwr & 0x0F);
1327                         command->length = 0x04;
1328                         command->address = addressofs;
1329                         command->width = 0x00 | (width & 0x0F);
1330                         command->follows = 4;
1331                         command->value = data;
1332                         command->buffer = &command->value;
1333                         ftdi->command_next += 1;
1334                         ftdi_elan_kick_command_queue(ftdi);
1335                         mutex_unlock(&ftdi->u132_lock);
1336                         return 0;
1337                 } else {
1338                         mutex_unlock(&ftdi->u132_lock);
1339                         msleep(100);
1340                         goto wait;
1341                 }
1342         }
1343 }
1344
1345 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1346         u8 width, u32 data)
1347 {
1348         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1349         return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1350 }
1351
1352
1353 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1354 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1355 {
1356       wait:if (ftdi->disconnected > 0) {
1357                 return -ENODEV;
1358         } else {
1359                 int command_size;
1360                 int respond_size;
1361                 mutex_lock(&ftdi->u132_lock);
1362                 command_size = ftdi->command_next - ftdi->command_head;
1363                 respond_size = ftdi->respond_next - ftdi->respond_head;
1364                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1365                         {
1366                         struct u132_command *command = &ftdi->command[
1367                                 COMMAND_MASK & ftdi->command_next];
1368                         struct u132_respond *respond = &ftdi->respond[
1369                                 RESPOND_MASK & ftdi->respond_next];
1370                         int result = -ENODEV;
1371                         respond->result = &result;
1372                         respond->header = command->header = 0x00 | cPCIu132rd;
1373                         command->length = 0x04;
1374                         respond->address = command->address = cU132cmd_status;
1375                         command->width = 0x00;
1376                         command->follows = 0;
1377                         command->value = 0;
1378                         command->buffer = NULL;
1379                         respond->value = data;
1380                         init_completion(&respond->wait_completion);
1381                         ftdi->command_next += 1;
1382                         ftdi->respond_next += 1;
1383                         ftdi_elan_kick_command_queue(ftdi);
1384                         mutex_unlock(&ftdi->u132_lock);
1385                         wait_for_completion(&respond->wait_completion);
1386                         return result;
1387                 } else {
1388                         mutex_unlock(&ftdi->u132_lock);
1389                         msleep(100);
1390                         goto wait;
1391                 }
1392         }
1393 }
1394
1395 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1396         u8 width, u32 *data)
1397 {
1398         u8 addressofs = config_offset / 4;
1399       wait:if (ftdi->disconnected > 0) {
1400                 return -ENODEV;
1401         } else {
1402                 int command_size;
1403                 int respond_size;
1404                 mutex_lock(&ftdi->u132_lock);
1405                 command_size = ftdi->command_next - ftdi->command_head;
1406                 respond_size = ftdi->respond_next - ftdi->respond_head;
1407                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1408                         {
1409                         struct u132_command *command = &ftdi->command[
1410                                 COMMAND_MASK & ftdi->command_next];
1411                         struct u132_respond *respond = &ftdi->respond[
1412                                 RESPOND_MASK & ftdi->respond_next];
1413                         int result = -ENODEV;
1414                         respond->result = &result;
1415                         respond->header = command->header = 0x00 | (cPCIcfgrd &
1416                                 0x0F);
1417                         command->length = 0x04;
1418                         respond->address = command->address = addressofs;
1419                         command->width = 0x00 | (width & 0x0F);
1420                         command->follows = 0;
1421                         command->value = 0;
1422                         command->buffer = NULL;
1423                         respond->value = data;
1424                         init_completion(&respond->wait_completion);
1425                         ftdi->command_next += 1;
1426                         ftdi->respond_next += 1;
1427                         ftdi_elan_kick_command_queue(ftdi);
1428                         mutex_unlock(&ftdi->u132_lock);
1429                         wait_for_completion(&respond->wait_completion);
1430                         return result;
1431                 } else {
1432                         mutex_unlock(&ftdi->u132_lock);
1433                         msleep(100);
1434                         goto wait;
1435                 }
1436         }
1437 }
1438
1439 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1440         u8 width, u32 *data)
1441 {
1442         u8 addressofs = mem_offset / 4;
1443       wait:if (ftdi->disconnected > 0) {
1444                 return -ENODEV;
1445         } else {
1446                 int command_size;
1447                 int respond_size;
1448                 mutex_lock(&ftdi->u132_lock);
1449                 command_size = ftdi->command_next - ftdi->command_head;
1450                 respond_size = ftdi->respond_next - ftdi->respond_head;
1451                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1452                         {
1453                         struct u132_command *command = &ftdi->command[
1454                                 COMMAND_MASK & ftdi->command_next];
1455                         struct u132_respond *respond = &ftdi->respond[
1456                                 RESPOND_MASK & ftdi->respond_next];
1457                         int result = -ENODEV;
1458                         respond->result = &result;
1459                         respond->header = command->header = 0x00 | (cPCImemrd &
1460                                 0x0F);
1461                         command->length = 0x04;
1462                         respond->address = command->address = addressofs;
1463                         command->width = 0x00 | (width & 0x0F);
1464                         command->follows = 0;
1465                         command->value = 0;
1466                         command->buffer = NULL;
1467                         respond->value = data;
1468                         init_completion(&respond->wait_completion);
1469                         ftdi->command_next += 1;
1470                         ftdi->respond_next += 1;
1471                         ftdi_elan_kick_command_queue(ftdi);
1472                         mutex_unlock(&ftdi->u132_lock);
1473                         wait_for_completion(&respond->wait_completion);
1474                         return result;
1475                 } else {
1476                         mutex_unlock(&ftdi->u132_lock);
1477                         msleep(100);
1478                         goto wait;
1479                 }
1480         }
1481 }
1482
1483 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1484         u8 width, u32 *data)
1485 {
1486         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1487         if (ftdi->initialized == 0) {
1488                 return -ENODEV;
1489         } else
1490                 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1491 }
1492
1493
1494 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1495 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1496         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1497         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1498         int toggle_bits, int error_count, int condition_code, int repeat_number,
1499          int halted, int skipped, int actual, int non_null))
1500 {
1501         u8 ed = ed_number - 1;
1502       wait:if (ftdi->disconnected > 0) {
1503                 return -ENODEV;
1504         } else if (ftdi->initialized == 0) {
1505                 return -ENODEV;
1506         } else {
1507                 int command_size;
1508                 mutex_lock(&ftdi->u132_lock);
1509                 command_size = ftdi->command_next - ftdi->command_head;
1510                 if (command_size < COMMAND_SIZE) {
1511                         struct u132_target *target = &ftdi->target[ed];
1512                         struct u132_command *command = &ftdi->command[
1513                                 COMMAND_MASK & ftdi->command_next];
1514                         command->header = 0x80 | (ed << 5);
1515                         command->length = 0x8007;
1516                         command->address = (toggle_bits << 6) | (ep_number << 2)
1517                                 | (address << 0);
1518                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1519                                 usb_pipeout(urb->pipe));
1520                         command->follows = 8;
1521                         command->value = 0;
1522                         command->buffer = urb->setup_packet;
1523                         target->callback = callback;
1524                         target->endp = endp;
1525                         target->urb = urb;
1526                         target->active = 1;
1527                         ftdi->command_next += 1;
1528                         ftdi_elan_kick_command_queue(ftdi);
1529                         mutex_unlock(&ftdi->u132_lock);
1530                         return 0;
1531                 } else {
1532                         mutex_unlock(&ftdi->u132_lock);
1533                         msleep(100);
1534                         goto wait;
1535                 }
1536         }
1537 }
1538
1539 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1540         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1541         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1542         int toggle_bits, int error_count, int condition_code, int repeat_number,
1543          int halted, int skipped, int actual, int non_null))
1544 {
1545         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1546         return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1547                 ep_number, toggle_bits, callback);
1548 }
1549
1550
1551 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1552 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1553         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1554         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1555         int toggle_bits, int error_count, int condition_code, int repeat_number,
1556          int halted, int skipped, int actual, int non_null))
1557 {
1558         u8 ed = ed_number - 1;
1559       wait:if (ftdi->disconnected > 0) {
1560                 return -ENODEV;
1561         } else if (ftdi->initialized == 0) {
1562                 return -ENODEV;
1563         } else {
1564                 int command_size;
1565                 mutex_lock(&ftdi->u132_lock);
1566                 command_size = ftdi->command_next - ftdi->command_head;
1567                 if (command_size < COMMAND_SIZE) {
1568                         struct u132_target *target = &ftdi->target[ed];
1569                         struct u132_command *command = &ftdi->command[
1570                                 COMMAND_MASK & ftdi->command_next];
1571                         int remaining_length = urb->transfer_buffer_length -
1572                                 urb->actual_length;
1573                         command->header = 0x82 | (ed << 5);
1574                         if (remaining_length == 0) {
1575                                 command->length = 0x0000;
1576                         } else if (remaining_length > 1024) {
1577                                 command->length = 0x8000 | 1023;
1578                         } else
1579                                 command->length = 0x8000 | (remaining_length -
1580                                         1);
1581                         command->address = (toggle_bits << 6) | (ep_number << 2)
1582                                 | (address << 0);
1583                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1584                                 usb_pipeout(urb->pipe));
1585                         command->follows = 0;
1586                         command->value = 0;
1587                         command->buffer = NULL;
1588                         target->callback = callback;
1589                         target->endp = endp;
1590                         target->urb = urb;
1591                         target->active = 1;
1592                         ftdi->command_next += 1;
1593                         ftdi_elan_kick_command_queue(ftdi);
1594                         mutex_unlock(&ftdi->u132_lock);
1595                         return 0;
1596                 } else {
1597                         mutex_unlock(&ftdi->u132_lock);
1598                         msleep(100);
1599                         goto wait;
1600                 }
1601         }
1602 }
1603
1604 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1605         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1606         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1607         int toggle_bits, int error_count, int condition_code, int repeat_number,
1608          int halted, int skipped, int actual, int non_null))
1609 {
1610         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1611         return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1612                 ep_number, toggle_bits, callback);
1613 }
1614
1615
1616 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1617 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1618         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1619         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1620         int toggle_bits, int error_count, int condition_code, int repeat_number,
1621          int halted, int skipped, int actual, int non_null))
1622 {
1623         u8 ed = ed_number - 1;
1624       wait:if (ftdi->disconnected > 0) {
1625                 return -ENODEV;
1626         } else if (ftdi->initialized == 0) {
1627                 return -ENODEV;
1628         } else {
1629                 int command_size;
1630                 mutex_lock(&ftdi->u132_lock);
1631                 command_size = ftdi->command_next - ftdi->command_head;
1632                 if (command_size < COMMAND_SIZE) {
1633                         struct u132_target *target = &ftdi->target[ed];
1634                         struct u132_command *command = &ftdi->command[
1635                                 COMMAND_MASK & ftdi->command_next];
1636                         command->header = 0x81 | (ed << 5);
1637                         command->length = 0x0000;
1638                         command->address = (toggle_bits << 6) | (ep_number << 2)
1639                                 | (address << 0);
1640                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1641                                 usb_pipeout(urb->pipe));
1642                         command->follows = 0;
1643                         command->value = 0;
1644                         command->buffer = NULL;
1645                         target->callback = callback;
1646                         target->endp = endp;
1647                         target->urb = urb;
1648                         target->active = 1;
1649                         ftdi->command_next += 1;
1650                         ftdi_elan_kick_command_queue(ftdi);
1651                         mutex_unlock(&ftdi->u132_lock);
1652                         return 0;
1653                 } else {
1654                         mutex_unlock(&ftdi->u132_lock);
1655                         msleep(100);
1656                         goto wait;
1657                 }
1658         }
1659 }
1660
1661 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1662         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1663         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1664         int toggle_bits, int error_count, int condition_code, int repeat_number,
1665          int halted, int skipped, int actual, int non_null))
1666 {
1667         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1668         return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1669                 ep_number, toggle_bits, callback);
1670 }
1671
1672
1673 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1674 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1675         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1676         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1677         int toggle_bits, int error_count, int condition_code, int repeat_number,
1678          int halted, int skipped, int actual, int non_null))
1679 {
1680         u8 ed = ed_number - 1;
1681       wait:if (ftdi->disconnected > 0) {
1682                 return -ENODEV;
1683         } else if (ftdi->initialized == 0) {
1684                 return -ENODEV;
1685         } else {
1686                 int command_size;
1687                 mutex_lock(&ftdi->u132_lock);
1688                 command_size = ftdi->command_next - ftdi->command_head;
1689                 if (command_size < COMMAND_SIZE) {
1690                         u8 *b;
1691                         u16 urb_size;
1692                         int i = 0;
1693                         char data[30 *3 + 4];
1694                         char *d = data;
1695                         int m = (sizeof(data) - 1) / 3;
1696                         int l = 0;
1697                         struct u132_target *target = &ftdi->target[ed];
1698                         struct u132_command *command = &ftdi->command[
1699                                 COMMAND_MASK & ftdi->command_next];
1700                         command->header = 0x81 | (ed << 5);
1701                         command->address = (toggle_bits << 6) | (ep_number << 2)
1702                                 | (address << 0);
1703                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1704                                 usb_pipeout(urb->pipe));
1705                         command->follows = min(1024,
1706                                 urb->transfer_buffer_length -
1707                                 urb->actual_length);
1708                         command->value = 0;
1709                         command->buffer = urb->transfer_buffer +
1710                                 urb->actual_length;
1711                         command->length = 0x8000 | (command->follows - 1);
1712                         b = command->buffer;
1713                         urb_size = command->follows;
1714                         data[0] = 0;
1715                         while (urb_size-- > 0) {
1716                                 if (i > m) {
1717                                 } else if (i++ < m) {
1718                                         int w = sprintf(d, " %02X", *b++);
1719                                         d += w;
1720                                         l += w;
1721                                 } else
1722                                         d += sprintf(d, " ..");
1723                         }
1724                         target->callback = callback;
1725                         target->endp = endp;
1726                         target->urb = urb;
1727                         target->active = 1;
1728                         ftdi->command_next += 1;
1729                         ftdi_elan_kick_command_queue(ftdi);
1730                         mutex_unlock(&ftdi->u132_lock);
1731                         return 0;
1732                 } else {
1733                         mutex_unlock(&ftdi->u132_lock);
1734                         msleep(100);
1735                         goto wait;
1736                 }
1737         }
1738 }
1739
1740 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1741         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1742         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1743         int toggle_bits, int error_count, int condition_code, int repeat_number,
1744          int halted, int skipped, int actual, int non_null))
1745 {
1746         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1747         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1748                 ep_number, toggle_bits, callback);
1749 }
1750
1751
1752 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1753 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1754         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1755         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1756         int toggle_bits, int error_count, int condition_code, int repeat_number,
1757          int halted, int skipped, int actual, int non_null))
1758 {
1759         u8 ed = ed_number - 1;
1760       wait:if (ftdi->disconnected > 0) {
1761                 return -ENODEV;
1762         } else if (ftdi->initialized == 0) {
1763                 return -ENODEV;
1764         } else {
1765                 int command_size;
1766                 mutex_lock(&ftdi->u132_lock);
1767                 command_size = ftdi->command_next - ftdi->command_head;
1768                 if (command_size < COMMAND_SIZE) {
1769                         int remaining_length = urb->transfer_buffer_length -
1770                                 urb->actual_length;
1771                         struct u132_target *target = &ftdi->target[ed];
1772                         struct u132_command *command = &ftdi->command[
1773                                 COMMAND_MASK & ftdi->command_next];
1774                         command->header = 0x83 | (ed << 5);
1775                         if (remaining_length == 0) {
1776                                 command->length = 0x0000;
1777                         } else if (remaining_length > 1024) {
1778                                 command->length = 0x8000 | 1023;
1779                         } else
1780                                 command->length = 0x8000 | (remaining_length -
1781                                         1);
1782                         command->address = (toggle_bits << 6) | (ep_number << 2)
1783                                 | (address << 0);
1784                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1785                                 usb_pipeout(urb->pipe));
1786                         command->follows = 0;
1787                         command->value = 0;
1788                         command->buffer = NULL;
1789                         target->callback = callback;
1790                         target->endp = endp;
1791                         target->urb = urb;
1792                         target->active = 1;
1793                         ftdi->command_next += 1;
1794                         ftdi_elan_kick_command_queue(ftdi);
1795                         mutex_unlock(&ftdi->u132_lock);
1796                         return 0;
1797                 } else {
1798                         mutex_unlock(&ftdi->u132_lock);
1799                         msleep(100);
1800                         goto wait;
1801                 }
1802         }
1803 }
1804
1805 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1806         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1807         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1808         int toggle_bits, int error_count, int condition_code, int repeat_number,
1809          int halted, int skipped, int actual, int non_null))
1810 {
1811         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1812         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1813                 ep_number, toggle_bits, callback);
1814 }
1815
1816
1817 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1818 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1819         void *endp)
1820 {
1821         u8 ed = ed_number - 1;
1822         if (ftdi->disconnected > 0) {
1823                 return -ENODEV;
1824         } else if (ftdi->initialized == 0) {
1825                 return -ENODEV;
1826         } else {
1827                 struct u132_target *target = &ftdi->target[ed];
1828                 mutex_lock(&ftdi->u132_lock);
1829                 if (target->abandoning > 0) {
1830                         mutex_unlock(&ftdi->u132_lock);
1831                         return 0;
1832                 } else {
1833                         target->abandoning = 1;
1834                       wait_1:if (target->active == 1) {
1835                                 int command_size = ftdi->command_next -
1836                                         ftdi->command_head;
1837                                 if (command_size < COMMAND_SIZE) {
1838                                         struct u132_command *command =
1839                                                 &ftdi->command[COMMAND_MASK &
1840                                                 ftdi->command_next];
1841                                         command->header = 0x80 | (ed << 5) |
1842                                                 0x4;
1843                                         command->length = 0x00;
1844                                         command->address = 0x00;
1845                                         command->width = 0x00;
1846                                         command->follows = 0;
1847                                         command->value = 0;
1848                                         command->buffer = &command->value;
1849                                         ftdi->command_next += 1;
1850                                         ftdi_elan_kick_command_queue(ftdi);
1851                                 } else {
1852                                         mutex_unlock(&ftdi->u132_lock);
1853                                         msleep(100);
1854                                         mutex_lock(&ftdi->u132_lock);
1855                                         goto wait_1;
1856                                 }
1857                         }
1858                         mutex_unlock(&ftdi->u132_lock);
1859                         return 0;
1860                 }
1861         }
1862 }
1863
1864 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1865         void *endp)
1866 {
1867         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1868         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1869 }
1870
1871
1872 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1873 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1874 {
1875         int retry_on_empty = 10;
1876         int retry_on_timeout = 5;
1877         int retry_on_status = 20;
1878       more:{
1879                 int packet_bytes = 0;
1880                 int retval = usb_bulk_msg(ftdi->udev,
1881                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1882                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1883                         &packet_bytes, msecs_to_jiffies(100));
1884                 if (packet_bytes > 2) {
1885                         char diag[30 *3 + 4];
1886                         char *d = diag;
1887                         int m = (sizeof(diag) - 1) / 3;
1888                         char *b = ftdi->bulk_in_buffer;
1889                         int bytes_read = 0;
1890                         diag[0] = 0;
1891                         while (packet_bytes-- > 0) {
1892                                 char c = *b++;
1893                                 if (bytes_read < m) {
1894                                         d += sprintf(d, " %02X",
1895                                                 0x000000FF & c);
1896                                 } else if (bytes_read > m) {
1897                                 } else
1898                                         d += sprintf(d, " ..");
1899                                 bytes_read += 1;
1900                                 continue;
1901                         }
1902                         goto more;
1903                 } else if (packet_bytes > 1) {
1904                         char s1 = ftdi->bulk_in_buffer[0];
1905                         char s2 = ftdi->bulk_in_buffer[1];
1906                         if (s1 == 0x31 && s2 == 0x60) {
1907                                 return 0;
1908                         } else if (retry_on_status-- > 0) {
1909                                 goto more;
1910                         } else {
1911                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1912                                         "imit reached\n");
1913                                 return -EFAULT;
1914                         }
1915                 } else if (packet_bytes > 0) {
1916                         char b1 = ftdi->bulk_in_buffer[0];
1917                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
1918                                 "TDI = %02X\n", b1);
1919                         if (retry_on_status-- > 0) {
1920                                 goto more;
1921                         } else {
1922                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1923                                         "imit reached\n");
1924                                 return -EFAULT;
1925                         }
1926                 } else if (retval == -ETIMEDOUT) {
1927                         if (retry_on_timeout-- > 0) {
1928                                 goto more;
1929                         } else {
1930                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
1931                                         "t reached\n");
1932                                 return -ENOMEM;
1933                         }
1934                 } else if (retval == 0) {
1935                         if (retry_on_empty-- > 0) {
1936                                 goto more;
1937                         } else {
1938                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
1939                                         "imit reached\n");
1940                                 return -ENOMEM;
1941                         }
1942                 } else {
1943                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1944                         return retval;
1945                 }
1946         }
1947         return -1;
1948 }
1949
1950
1951 /*
1952 * send the long flush sequence
1953 *
1954 */
1955 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1956 {
1957         int retval;
1958         struct urb *urb;
1959         char *buf;
1960         int I = 257;
1961         int i = 0;
1962         urb = usb_alloc_urb(0, GFP_KERNEL);
1963         if (!urb) {
1964                 dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequ"
1965                         "ence\n");
1966                 return -ENOMEM;
1967         }
1968         buf = usb_buffer_alloc(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1969         if (!buf) {
1970                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush seq"
1971                         "uence\n");
1972                 usb_free_urb(urb);
1973                 return -ENOMEM;
1974         }
1975         while (I-- > 0)
1976                 buf[i++] = 0x55;
1977         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1978                 ftdi->bulk_out_endpointAddr), buf, i,
1979                 ftdi_elan_write_bulk_callback, ftdi);
1980         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1981         retval = usb_submit_urb(urb, GFP_KERNEL);
1982         if (retval) {
1983                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
1984                         "flush sequence\n");
1985                 usb_buffer_free(ftdi->udev, i, buf, urb->transfer_dma);
1986                 usb_free_urb(urb);
1987                 return -ENOMEM;
1988         }
1989         usb_free_urb(urb);
1990         return 0;
1991 }
1992
1993
1994 /*
1995 * send the reset sequence
1996 *
1997 */
1998 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1999 {
2000         int retval;
2001         struct urb *urb;
2002         char *buf;
2003         int I = 4;
2004         int i = 0;
2005         urb = usb_alloc_urb(0, GFP_KERNEL);
2006         if (!urb) {
2007                 dev_err(&ftdi->udev->dev, "could not get a urb for the reset se"
2008                         "quence\n");
2009                 return -ENOMEM;
2010         }
2011         buf = usb_buffer_alloc(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
2012         if (!buf) {
2013                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset"
2014                         " sequence\n");
2015                 usb_free_urb(urb);
2016                 return -ENOMEM;
2017         }
2018         buf[i++] = 0x55;
2019         buf[i++] = 0xAA;
2020         buf[i++] = 0x5A;
2021         buf[i++] = 0xA5;
2022         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2023                 ftdi->bulk_out_endpointAddr), buf, i,
2024                 ftdi_elan_write_bulk_callback, ftdi);
2025         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2026         retval = usb_submit_urb(urb, GFP_KERNEL);
2027         if (retval) {
2028                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
2029                         "reset sequence\n");
2030                 usb_buffer_free(ftdi->udev, i, buf, urb->transfer_dma);
2031                 usb_free_urb(urb);
2032                 return -ENOMEM;
2033         }
2034         usb_free_urb(urb);
2035         return 0;
2036 }
2037
2038 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2039 {
2040         int retval;
2041         int long_stop = 10;
2042         int retry_on_timeout = 5;
2043         int retry_on_empty = 10;
2044         int err_count = 0;
2045         retval = ftdi_elan_flush_input_fifo(ftdi);
2046         if (retval)
2047                 return retval;
2048         ftdi->bulk_in_left = 0;
2049         ftdi->bulk_in_last = -1;
2050         while (long_stop-- > 0) {
2051                 int read_stop;
2052                 int read_stuck;
2053                 retval = ftdi_elan_synchronize_flush(ftdi);
2054                 if (retval)
2055                         return retval;
2056                 retval = ftdi_elan_flush_input_fifo(ftdi);
2057                 if (retval)
2058                         return retval;
2059               reset:retval = ftdi_elan_synchronize_reset(ftdi);
2060                 if (retval)
2061                         return retval;
2062                 read_stop = 100;
2063                 read_stuck = 10;
2064               read:{
2065                         int packet_bytes = 0;
2066                         retval = usb_bulk_msg(ftdi->udev,
2067                                 usb_rcvbulkpipe(ftdi->udev,
2068                                 ftdi->bulk_in_endpointAddr),
2069                                 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2070                                 &packet_bytes, msecs_to_jiffies(500));
2071                         if (packet_bytes > 2) {
2072                                 char diag[30 *3 + 4];
2073                                 char *d = diag;
2074                                 int m = (sizeof(diag) - 1) / 3;
2075                                 char *b = ftdi->bulk_in_buffer;
2076                                 int bytes_read = 0;
2077                                 unsigned char c = 0;
2078                                 diag[0] = 0;
2079                                 while (packet_bytes-- > 0) {
2080                                         c = *b++;
2081                                         if (bytes_read < m) {
2082                                                 d += sprintf(d, " %02X", c);
2083                                         } else if (bytes_read > m) {
2084                                         } else
2085                                                 d += sprintf(d, " ..");
2086                                         bytes_read += 1;
2087                                         continue;
2088                                 }
2089                                 if (c == 0x7E) {
2090                                         return 0;
2091                                 } else {
2092                                         if (c == 0x55) {
2093                                                 goto read;
2094                                         } else if (read_stop-- > 0) {
2095                                                 goto read;
2096                                         } else {
2097                                                 dev_err(&ftdi->udev->dev, "retr"
2098                                                         "y limit reached\n");
2099                                                 continue;
2100                                         }
2101                                 }
2102                         } else if (packet_bytes > 1) {
2103                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2104                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2105                                 if (s1 == 0x31 && s2 == 0x00) {
2106                                         if (read_stuck-- > 0) {
2107                                                 goto read;
2108                                         } else
2109                                                 goto reset;
2110                                 } else if (s1 == 0x31 && s2 == 0x60) {
2111                                         if (read_stop-- > 0) {
2112                                                 goto read;
2113                                         } else {
2114                                                 dev_err(&ftdi->udev->dev, "retr"
2115                                                         "y limit reached\n");
2116                                                 continue;
2117                                         }
2118                                 } else {
2119                                         if (read_stop-- > 0) {
2120                                                 goto read;
2121                                         } else {
2122                                                 dev_err(&ftdi->udev->dev, "retr"
2123                                                         "y limit reached\n");
2124                                                 continue;
2125                                         }
2126                                 }
2127                         } else if (packet_bytes > 0) {
2128                                 if (read_stop-- > 0) {
2129                                         goto read;
2130                                 } else {
2131                                         dev_err(&ftdi->udev->dev, "retry limit "
2132                                                 "reached\n");
2133                                         continue;
2134                                 }
2135                         } else if (retval == -ETIMEDOUT) {
2136                                 if (retry_on_timeout-- > 0) {
2137                                         goto read;
2138                                 } else {
2139                                         dev_err(&ftdi->udev->dev, "TIMED OUT re"
2140                                                 "try limit reached\n");
2141                                         continue;
2142                                 }
2143                         } else if (retval == 0) {
2144                                 if (retry_on_empty-- > 0) {
2145                                         goto read;
2146                                 } else {
2147                                         dev_err(&ftdi->udev->dev, "empty packet"
2148                                                 " retry limit reached\n");
2149                                         continue;
2150                                 }
2151                         } else {
2152                                 err_count += 1;
2153                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2154                                         retval);
2155                                 if (read_stop-- > 0) {
2156                                         goto read;
2157                                 } else {
2158                                         dev_err(&ftdi->udev->dev, "retry limit "
2159                                                 "reached\n");
2160                                         continue;
2161                                 }
2162                         }
2163                 }
2164         }
2165         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2166         return -EFAULT;
2167 }
2168
2169 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2170 {
2171         int retry_on_empty = 10;
2172         int retry_on_timeout = 5;
2173         int retry_on_status = 50;
2174       more:{
2175                 int packet_bytes = 0;
2176                 int retval = usb_bulk_msg(ftdi->udev,
2177                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2178                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2179                         &packet_bytes, msecs_to_jiffies(1000));
2180                 if (packet_bytes > 2) {
2181                         char diag[30 *3 + 4];
2182                         char *d = diag;
2183                         int m = (sizeof(diag) - 1) / 3;
2184                         char *b = ftdi->bulk_in_buffer;
2185                         int bytes_read = 0;
2186                         diag[0] = 0;
2187                         while (packet_bytes-- > 0) {
2188                                 char c = *b++;
2189                                 if (bytes_read < m) {
2190                                         d += sprintf(d, " %02X",
2191                                                 0x000000FF & c);
2192                                 } else if (bytes_read > m) {
2193                                 } else
2194                                         d += sprintf(d, " ..");
2195                                 bytes_read += 1;
2196                                 continue;
2197                         }
2198                         goto more;
2199                 } else if (packet_bytes > 1) {
2200                         char s1 = ftdi->bulk_in_buffer[0];
2201                         char s2 = ftdi->bulk_in_buffer[1];
2202                         if (s1 == 0x31 && s2 == 0x60) {
2203                                 return 0;
2204                         } else if (retry_on_status-- > 0) {
2205                                 msleep(5);
2206                                 goto more;
2207                         } else
2208                                 return -EFAULT;
2209                 } else if (packet_bytes > 0) {
2210                         char b1 = ftdi->bulk_in_buffer[0];
2211                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
2212                                 "TDI = %02X\n", b1);
2213                         if (retry_on_status-- > 0) {
2214                                 msleep(5);
2215                                 goto more;
2216                         } else {
2217                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
2218                                         "imit reached\n");
2219                                 return -EFAULT;
2220                         }
2221                 } else if (retval == -ETIMEDOUT) {
2222                         if (retry_on_timeout-- > 0) {
2223                                 goto more;
2224                         } else {
2225                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
2226                                         "t reached\n");
2227                                 return -ENOMEM;
2228                         }
2229                 } else if (retval == 0) {
2230                         if (retry_on_empty-- > 0) {
2231                                 goto more;
2232                         } else {
2233                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
2234                                         "imit reached\n");
2235                                 return -ENOMEM;
2236                         }
2237                 } else {
2238                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2239                         return -ENOMEM;
2240                 }
2241         }
2242         return -1;
2243 }
2244
2245 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2246 {
2247         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2248         if (UxxxStatus)
2249                 return UxxxStatus;
2250         if (ftdi->controlreg & 0x00400000) {
2251                 if (ftdi->card_ejected) {
2252                 } else {
2253                         ftdi->card_ejected = 1;
2254                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = "
2255                                 "%08X\n", ftdi->controlreg);
2256                 }
2257                 return -ENODEV;
2258         } else {
2259                 u8 fn = ftdi->function - 1;
2260                 int activePCIfn = fn << 8;
2261                 u32 pcidata;
2262                 u32 pciVID;
2263                 u32 pciPID;
2264                 int reg = 0;
2265                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2266                         &pcidata);
2267                 if (UxxxStatus)
2268                         return UxxxStatus;
2269                 pciVID = pcidata & 0xFFFF;
2270                 pciPID = (pcidata >> 16) & 0xFFFF;
2271                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2272                         ftdi->platform_data.device) {
2273                         return 0;
2274                 } else {
2275                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X devi"
2276                                 "ce=%04X pciPID=%04X\n",
2277                                 ftdi->platform_data.vendor, pciVID,
2278                                 ftdi->platform_data.device, pciPID);
2279                         return -ENODEV;
2280                 }
2281         }
2282 }
2283
2284
2285 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2286         offsetof(struct ohci_regs, member), 0, data);
2287 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2288         offsetof(struct ohci_regs, member), 0, data);
2289
2290 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2291 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2292         OHCI_INTR_WDH)
2293 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2294 {
2295         int devices = 0;
2296         int retval;
2297         u32 hc_control;
2298         int num_ports;
2299         u32 control;
2300         u32 rh_a = -1;
2301         u32 status;
2302         u32 fminterval;
2303         u32 hc_fminterval;
2304         u32 periodicstart;
2305         u32 cmdstatus;
2306         u32 roothub_a;
2307         int mask = OHCI_INTR_INIT;
2308         int sleep_time = 0;
2309         int reset_timeout = 30;        /* ... allow extra time */
2310         int temp;
2311         retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2312         if (retval)
2313                 return retval;
2314         retval = ftdi_read_pcimem(ftdi, control, &control);
2315         if (retval)
2316                 return retval;
2317         retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2318         if (retval)
2319                 return retval;
2320         num_ports = rh_a & RH_A_NDP;
2321         retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2322         if (retval)
2323                 return retval;
2324         hc_fminterval &= 0x3fff;
2325         if (hc_fminterval != FI) {
2326         }
2327         hc_fminterval |= FSMP(hc_fminterval) << 16;
2328         retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2329         if (retval)
2330                 return retval;
2331         switch (hc_control & OHCI_CTRL_HCFS) {
2332         case OHCI_USB_OPER:
2333                 sleep_time = 0;
2334                 break;
2335         case OHCI_USB_SUSPEND:
2336         case OHCI_USB_RESUME:
2337                 hc_control &= OHCI_CTRL_RWC;
2338                 hc_control |= OHCI_USB_RESUME;
2339                 sleep_time = 10;
2340                 break;
2341         default:
2342                 hc_control &= OHCI_CTRL_RWC;
2343                 hc_control |= OHCI_USB_RESET;
2344                 sleep_time = 50;
2345                 break;
2346         }
2347         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2348         if (retval)
2349                 return retval;
2350         retval = ftdi_read_pcimem(ftdi, control, &control);
2351         if (retval)
2352                 return retval;
2353         msleep(sleep_time);
2354         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2355         if (retval)
2356                 return retval;
2357         if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2358                 for (temp = 0; temp < num_ports; temp++) {
2359                         retval = ftdi_write_pcimem(ftdi,
2360                                 roothub.portstatus[temp], RH_PS_LSDA);
2361                         if (retval)
2362                                 return retval;
2363                 }
2364         }
2365         retval = ftdi_read_pcimem(ftdi, control, &control);
2366         if (retval)
2367                 return retval;
2368       retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2369         if (retval)
2370                 return retval;
2371         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2372         if (retval)
2373                 return retval;
2374       extra:{
2375                 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2376                 if (retval)
2377                         return retval;
2378                 if (0 != (status & OHCI_HCR)) {
2379                         if (--reset_timeout == 0) {
2380                                 dev_err(&ftdi->udev->dev, "USB HC reset timed o"
2381                                         "ut!\n");
2382                                 return -ENODEV;
2383                         } else {
2384                                 msleep(5);
2385                                 goto extra;
2386                         }
2387                 }
2388         }
2389         if (quirk & OHCI_QUIRK_INITRESET) {
2390                 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2391                 if (retval)
2392                         return retval;
2393                 retval = ftdi_read_pcimem(ftdi, control, &control);
2394                 if (retval)
2395                         return retval;
2396         }
2397         retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2398         if (retval)
2399                 return retval;
2400         retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2401         if (retval)
2402                 return retval;
2403         retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2404         if (retval)
2405                 return retval;
2406         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2407         if (retval)
2408                 return retval;
2409         retval = ftdi_write_pcimem(ftdi, fminterval,
2410                 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2411         if (retval)
2412                 return retval;
2413         retval = ftdi_write_pcimem(ftdi, periodicstart,
2414                 ((9 *hc_fminterval) / 10) & 0x3fff);
2415         if (retval)
2416                 return retval;
2417         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2418         if (retval)
2419                 return retval;
2420         retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2421         if (retval)
2422                 return retval;
2423         if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2424                 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2425                         quirk |= OHCI_QUIRK_INITRESET;
2426                         goto retry;
2427                 } else
2428                         dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2429                                 fminterval, periodicstart);
2430         }                        /* start controller operations */
2431         hc_control &= OHCI_CTRL_RWC;
2432         hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2433         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2434         if (retval)
2435                 return retval;
2436         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2437         if (retval)
2438                 return retval;
2439         retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2440         if (retval)
2441                 return retval;
2442         retval = ftdi_read_pcimem(ftdi, control, &control);
2443         if (retval)
2444                 return retval;
2445         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2446         if (retval)
2447                 return retval;
2448         retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2449         if (retval)
2450                 return retval;
2451         retval = ftdi_write_pcimem(ftdi, intrdisable,
2452                 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2453                 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2454                 OHCI_INTR_SO);
2455         if (retval)
2456                 return retval;        /* handle root hub init quirks ... */
2457         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2458         if (retval)
2459                 return retval;
2460         roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2461         if (quirk & OHCI_QUIRK_SUPERIO) {
2462                 roothub_a |= RH_A_NOCP;
2463                 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2464                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2465                 if (retval)
2466                         return retval;
2467         } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2468                 roothub_a |= RH_A_NPS;
2469                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2470                 if (retval)
2471                         return retval;
2472         }
2473         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2474         if (retval)
2475                 return retval;
2476         retval = ftdi_write_pcimem(ftdi, roothub.b,
2477                 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2478         if (retval)
2479                 return retval;
2480         retval = ftdi_read_pcimem(ftdi, control, &control);
2481         if (retval)
2482                 return retval;
2483         mdelay((roothub_a >> 23) & 0x1fe);
2484         for (temp = 0; temp < num_ports; temp++) {
2485                 u32 portstatus;
2486                 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2487                         &portstatus);
2488                 if (retval)
2489                         return retval;
2490                 if (1 & portstatus)
2491                         devices += 1;
2492         }
2493         return devices;
2494 }
2495
2496 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2497 {
2498         u32 latence_timer;
2499         int UxxxStatus;
2500         u32 pcidata;
2501         int reg = 0;
2502         int activePCIfn = fn << 8;
2503         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2504         if (UxxxStatus)
2505                 return UxxxStatus;
2506         reg = 16;
2507         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2508                 0xFFFFFFFF);
2509         if (UxxxStatus)
2510                 return UxxxStatus;
2511         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2512                 &pcidata);
2513         if (UxxxStatus)
2514                 return UxxxStatus;
2515         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2516                 0xF0000000);
2517         if (UxxxStatus)
2518                 return UxxxStatus;
2519         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2520                 &pcidata);
2521         if (UxxxStatus)
2522                 return UxxxStatus;
2523         reg = 12;
2524         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2525                 &latence_timer);
2526         if (UxxxStatus)
2527                 return UxxxStatus;
2528         latence_timer &= 0xFFFF00FF;
2529         latence_timer |= 0x00001600;
2530         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2531                 latence_timer);
2532         if (UxxxStatus)
2533                 return UxxxStatus;
2534         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2535                 &pcidata);
2536         if (UxxxStatus)
2537                 return UxxxStatus;
2538         reg = 4;
2539         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2540                 0x06);
2541         if (UxxxStatus)
2542                 return UxxxStatus;
2543         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2544                 &pcidata);
2545         if (UxxxStatus)
2546                 return UxxxStatus;
2547         for (reg = 0; reg <= 0x54; reg += 4) {
2548                 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2549                 if (UxxxStatus)
2550                         return UxxxStatus;
2551         }
2552         return 0;
2553 }
2554
2555 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2556 {
2557         u32 latence_timer;
2558         int UxxxStatus;
2559         u32 pcidata;
2560         int reg = 0;
2561         int activePCIfn = fn << 8;
2562         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2563         if (UxxxStatus)
2564                 return UxxxStatus;
2565         reg = 16;
2566         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2567                 0xFFFFFFFF);
2568         if (UxxxStatus)
2569                 return UxxxStatus;
2570         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2571                 &pcidata);
2572         if (UxxxStatus)
2573                 return UxxxStatus;
2574         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2575                 0x00000000);
2576         if (UxxxStatus)
2577                 return UxxxStatus;
2578         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2579                 &pcidata);
2580         if (UxxxStatus)
2581                 return UxxxStatus;
2582         reg = 12;
2583         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2584                 &latence_timer);
2585         if (UxxxStatus)
2586                 return UxxxStatus;
2587         latence_timer &= 0xFFFF00FF;
2588         latence_timer |= 0x00001600;
2589         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2590                 latence_timer);
2591         if (UxxxStatus)
2592                 return UxxxStatus;
2593         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2594                 &pcidata);
2595         if (UxxxStatus)
2596                 return UxxxStatus;
2597         reg = 4;
2598         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2599                 0x00);
2600         if (UxxxStatus)
2601                 return UxxxStatus;
2602         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2603                 &pcidata);
2604         if (UxxxStatus)
2605                 return UxxxStatus;
2606         return 0;
2607 }
2608
2609 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2610 {
2611         int result;
2612         int UxxxStatus;
2613         UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2614         if (UxxxStatus)
2615                 return UxxxStatus;
2616         result = ftdi_elan_check_controller(ftdi, quirk);
2617         UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2618         if (UxxxStatus)
2619                 return UxxxStatus;
2620         return result;
2621 }
2622
2623 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2624 {
2625         u32 controlreg;
2626         u8 sensebits;
2627         int UxxxStatus;
2628         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2629         if (UxxxStatus)
2630                 return UxxxStatus;
2631         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2632         if (UxxxStatus)
2633                 return UxxxStatus;
2634         msleep(750);
2635         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2636         if (UxxxStatus)
2637                 return UxxxStatus;
2638         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2639         if (UxxxStatus)
2640                 return UxxxStatus;
2641         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2642         if (UxxxStatus)
2643                 return UxxxStatus;
2644         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2645         if (UxxxStatus)
2646                 return UxxxStatus;
2647         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2648         if (UxxxStatus)
2649                 return UxxxStatus;
2650         msleep(250);
2651         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2652         if (UxxxStatus)
2653                 return UxxxStatus;
2654         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2655         if (UxxxStatus)
2656                 return UxxxStatus;
2657         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2658         if (UxxxStatus)
2659                 return UxxxStatus;
2660         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2661         if (UxxxStatus)
2662                 return UxxxStatus;
2663         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2664         if (UxxxStatus)
2665                 return UxxxStatus;
2666         msleep(1000);
2667         sensebits = (controlreg >> 16) & 0x000F;
2668         if (0x0D == sensebits)
2669                 return 0;
2670         else
2671                 return - ENXIO;
2672 }
2673
2674 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2675 {
2676         int UxxxStatus;
2677         u32 pcidata;
2678         int reg = 0;
2679         u8 fn;
2680         int activePCIfn = 0;
2681         int max_devices = 0;
2682         int controllers = 0;
2683         int unrecognized = 0;
2684         ftdi->function = 0;
2685         for (fn = 0; (fn < 4); fn++) {
2686                 u32 pciVID = 0;
2687                 u32 pciPID = 0;
2688                 int devices = 0;
2689                 activePCIfn = fn << 8;
2690                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2691                         &pcidata);
2692                 if (UxxxStatus)
2693                         return UxxxStatus;
2694                 pciVID = pcidata & 0xFFFF;
2695                 pciPID = (pcidata >> 16) & 0xFFFF;
2696                 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2697                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2698                         controllers += 1;
2699                 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2700                         {
2701                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2702                         controllers += 1;
2703                 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2704                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2705                         controllers += 1;
2706                 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2707                         {
2708                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2709                         controllers += 1;
2710                 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2711                         devices = ftdi_elan_found_controller(ftdi, fn,
2712                                 OHCI_QUIRK_AMD756);
2713                         controllers += 1;
2714                 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2715                         devices = ftdi_elan_found_controller(ftdi, fn,
2716                                 OHCI_QUIRK_ZFMICRO);
2717                         controllers += 1;
2718                 } else if (0 == pcidata) {
2719                 } else
2720                         unrecognized += 1;
2721                 if (devices > max_devices) {
2722                         max_devices = devices;
2723                         ftdi->function = fn + 1;
2724                         ftdi->platform_data.vendor = pciVID;
2725                         ftdi->platform_data.device = pciPID;
2726                 }
2727         }
2728         if (ftdi->function > 0) {
2729                 UxxxStatus = ftdi_elan_setup_controller(ftdi,
2730                         ftdi->function - 1);
2731                 if (UxxxStatus)
2732                         return UxxxStatus;
2733                 return 0;
2734         } else if (controllers > 0) {
2735                 return -ENXIO;
2736         } else if (unrecognized > 0) {
2737                 return -ENXIO;
2738         } else {
2739                 ftdi->enumerated = 0;
2740                 return -ENXIO;
2741         }
2742 }
2743
2744
2745 /*
2746 * we use only the first bulk-in and bulk-out endpoints
2747 */
2748 static int ftdi_elan_probe(struct usb_interface *interface,
2749         const struct usb_device_id *id)
2750 {
2751         struct usb_host_interface *iface_desc;
2752         struct usb_endpoint_descriptor *endpoint;
2753         size_t buffer_size;
2754         int i;
2755         int retval = -ENOMEM;
2756         struct usb_ftdi *ftdi;
2757
2758         ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2759         if (!ftdi) {
2760                 printk(KERN_ERR "Out of memory\n");
2761                 return -ENOMEM;
2762         }
2763
2764         mutex_lock(&ftdi_module_lock);
2765         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2766         ftdi->sequence_num = ++ftdi_instances;
2767         mutex_unlock(&ftdi_module_lock);
2768         ftdi_elan_init_kref(ftdi);
2769         init_MUTEX(&ftdi->sw_lock);
2770         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2771         ftdi->interface = interface;
2772         mutex_init(&ftdi->u132_lock);
2773         ftdi->expected = 4;
2774         iface_desc = interface->cur_altsetting;
2775         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2776                 endpoint = &iface_desc->endpoint[i].desc;
2777                 if (!ftdi->bulk_in_endpointAddr &&
2778                     usb_endpoint_is_bulk_in(endpoint)) {
2779                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2780                         ftdi->bulk_in_size = buffer_size;
2781                         ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2782                         ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2783                         if (!ftdi->bulk_in_buffer) {
2784                                 dev_err(&ftdi->udev->dev, "Could not allocate b"
2785                                         "ulk_in_buffer\n");
2786                                 retval = -ENOMEM;
2787                                 goto error;
2788                         }
2789                 }
2790                 if (!ftdi->bulk_out_endpointAddr &&
2791                     usb_endpoint_is_bulk_out(endpoint)) {
2792                         ftdi->bulk_out_endpointAddr =
2793                                 endpoint->bEndpointAddress;
2794                 }
2795         }
2796         if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2797                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk"
2798                         "-out endpoints\n");
2799                 retval = -ENODEV;
2800                 goto error;
2801         }
2802         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2803                 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2804                 ftdi->bulk_out_endpointAddr);
2805         usb_set_intfdata(interface, ftdi);
2806         if (iface_desc->desc.bInterfaceNumber == 0 &&
2807                 ftdi->bulk_in_endpointAddr == 0x81 &&
2808                 ftdi->bulk_out_endpointAddr == 0x02) {
2809                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2810                 if (retval) {
2811                         dev_err(&ftdi->udev->dev, "Not able to get a minor for "
2812                                 "this device.\n");
2813                         usb_set_intfdata(interface, NULL);
2814                         retval = -ENOMEM;
2815                         goto error;
2816                 } else {
2817                         ftdi->class = &ftdi_elan_jtag_class;
2818                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface "
2819                                 "%d now attached to ftdi%d\n", ftdi,
2820                                 iface_desc->desc.bInterfaceNumber,
2821                                 interface->minor);
2822                         return 0;
2823                 }
2824         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2825                 ftdi->bulk_in_endpointAddr == 0x83 &&
2826                 ftdi->bulk_out_endpointAddr == 0x04) {
2827                 ftdi->class = NULL;
2828                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now a"
2829                         "ctivated\n", ftdi, iface_desc->desc.bInterfaceNumber);
2830                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2831                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2832                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2833                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2834                 return 0;
2835         } else {
2836                 dev_err(&ftdi->udev->dev,
2837                         "Could not find ELAN's U132 device\n");
2838                 retval = -ENODEV;
2839                 goto error;
2840         }
2841       error:if (ftdi) {
2842                 ftdi_elan_put_kref(ftdi);
2843         }
2844         return retval;
2845 }
2846
2847 static void ftdi_elan_disconnect(struct usb_interface *interface)
2848 {
2849         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2850         ftdi->disconnected += 1;
2851         if (ftdi->class) {
2852                 int minor = interface->minor;
2853                 struct usb_class_driver *class = ftdi->class;
2854                 usb_set_intfdata(interface, NULL);
2855                 usb_deregister_dev(interface, class);
2856                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on min"
2857                         "or %d now disconnected\n", minor);
2858         } else {
2859                 ftdi_status_cancel_work(ftdi);
2860                 ftdi_command_cancel_work(ftdi);
2861                 ftdi_response_cancel_work(ftdi);
2862                 ftdi_elan_abandon_completions(ftdi);
2863                 ftdi_elan_abandon_targets(ftdi);
2864                 if (ftdi->registered) {
2865                         platform_device_unregister(&ftdi->platform_dev);
2866                         ftdi->synchronized = 0;
2867                         ftdi->enumerated = 0;
2868                         ftdi->initialized = 0;
2869                         ftdi->registered = 0;
2870                 }
2871                 flush_workqueue(status_queue);
2872                 flush_workqueue(command_queue);
2873                 flush_workqueue(respond_queue);
2874                 ftdi->disconnected += 1;
2875                 usb_set_intfdata(interface, NULL);
2876                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller inter"
2877                         "face now disconnected\n");
2878         }
2879         ftdi_elan_put_kref(ftdi);
2880 }
2881
2882 static struct usb_driver ftdi_elan_driver = {
2883         .name = "ftdi-elan",
2884         .probe = ftdi_elan_probe,
2885         .disconnect = ftdi_elan_disconnect,
2886         .id_table = ftdi_elan_table,
2887 };
2888 static int __init ftdi_elan_init(void)
2889 {
2890         int result;
2891         printk(KERN_INFO "driver %s built at %s on %s\n", ftdi_elan_driver.name,
2892                __TIME__, __DATE__);
2893         mutex_init(&ftdi_module_lock);
2894         INIT_LIST_HEAD(&ftdi_static_list);
2895         status_queue = create_singlethread_workqueue("ftdi-status-control");
2896         if (!status_queue)
2897                 goto err_status_queue;
2898         command_queue = create_singlethread_workqueue("ftdi-command-engine");
2899         if (!command_queue)
2900                 goto err_command_queue;
2901         respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2902         if (!respond_queue)
2903                 goto err_respond_queue;
2904         result = usb_register(&ftdi_elan_driver);
2905         if (result) {
2906                 destroy_workqueue(status_queue);
2907                 destroy_workqueue(command_queue);
2908                 destroy_workqueue(respond_queue);
2909                 printk(KERN_ERR "usb_register failed. Error number %d\n",
2910                        result);
2911         }
2912         return result;
2913
2914  err_respond_queue:
2915         destroy_workqueue(command_queue);
2916  err_command_queue:
2917         destroy_workqueue(status_queue);
2918  err_status_queue:
2919         printk(KERN_ERR "%s couldn't create workqueue\n", ftdi_elan_driver.name);
2920         return -ENOMEM;
2921 }
2922
2923 static void __exit ftdi_elan_exit(void)
2924 {
2925         struct usb_ftdi *ftdi;
2926         struct usb_ftdi *temp;
2927         usb_deregister(&ftdi_elan_driver);
2928         printk(KERN_INFO "ftdi_u132 driver deregistered\n");
2929         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2930                 ftdi_status_cancel_work(ftdi);
2931                 ftdi_command_cancel_work(ftdi);
2932                 ftdi_response_cancel_work(ftdi);
2933         } flush_workqueue(status_queue);
2934         destroy_workqueue(status_queue);
2935         status_queue = NULL;
2936         flush_workqueue(command_queue);
2937         destroy_workqueue(command_queue);
2938         command_queue = NULL;
2939         flush_workqueue(respond_queue);
2940         destroy_workqueue(respond_queue);
2941         respond_queue = NULL;
2942 }
2943
2944
2945 module_init(ftdi_elan_init);
2946 module_exit(ftdi_elan_exit);