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 semaphore 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         down(&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         } up(&ftdi->u132_lock);
 341 }
 342
 343 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
 344 {
 345         int ed_number = 4;
 346         down(&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                         up(&ftdi->u132_lock);
 352                         ftdi_elan_do_callback(ftdi, target, NULL, 0);
 353                         down(&ftdi->u132_lock);
 354                 }
 355         }
 356         ftdi->recieved = 0;
 357         ftdi->expected = 4;
 358         ftdi->ed_found = 0;
 359         up(&ftdi->u132_lock);
 360 }
 361
 362 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
 363 {
 364         int ed_number = 4;
 365         down(&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                                 up(&ftdi->u132_lock);
 386                                 msleep(100);
 387                                 down(&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                                 up(&ftdi->u132_lock);
 408                                 msleep(100);
 409                                 down(&ftdi->u132_lock);
 410                                 goto wait_2;
 411                         }
 412                 }
 413         }
 414         ftdi->recieved = 0;
 415         ftdi->expected = 4;
 416         ftdi->ed_found = 0;
 417         up(&ftdi->u132_lock);
 418 }
 419
 420 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
 421 {
 422         int ed_number = 4;
 423         down(&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                                 up(&ftdi->u132_lock);
 444                                 msleep(100);
 445                                 down(&ftdi->u132_lock);
 446                                 goto wait;
 447                         }
 448                 }
 449         }
 450         ftdi->recieved = 0;
 451         ftdi->expected = 4;
 452         ftdi->ed_found = 0;
 453         up(&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 #define FTDI_ELAN_IOC_MAGIC 0xA1
 660 #define FTDI_ELAN_IOCDEBUG _IOC(_IOC_WRITE, FTDI_ELAN_IOC_MAGIC, 1, 132)
 661 static int ftdi_elan_ioctl(struct inode *inode, struct file *file,
 662         unsigned int cmd, unsigned long arg)
 663 {
 664         switch (cmd) {
 665         case FTDI_ELAN_IOCDEBUG:{
 666                         char line[132];
 667                         int size = strncpy_from_user(line,
 668                                 (const char __user *)arg, sizeof(line));
 669                         if (size < 0) {
 670                                 return -EINVAL;
 671                         } else {
 672                                 printk(KERN_ERR "TODO: ioctl %s\n", line);
 673                                 return 0;
 674                         }
 675                 }
 676         default:
 677                 return -EFAULT;
 678         }
 679 }
 680
 681
 682 /*
 683 *
 684 * blocking bulk reads are used to get data from the device
 685 *
 686 */
 687 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 688                               size_t count, loff_t *ppos)
 689 {
 690         char data[30 *3 + 4];
 691         char *d = data;
 692         int m = (sizeof(data) - 1) / 3;
 693         int bytes_read = 0;
 694         int retry_on_empty = 10;
 695         int retry_on_timeout = 5;
 696         struct usb_ftdi *ftdi = (struct usb_ftdi *)file->private_data;
 697         if (ftdi->disconnected > 0) {
 698                 return -ENODEV;
 699         }
 700         data[0] = 0;
 701       have:if (ftdi->bulk_in_left > 0) {
 702                 if (count-- > 0) {
 703                         char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 704                         ftdi->bulk_in_left -= 1;
 705                         if (bytes_read < m) {
 706                                 d += sprintf(d, " %02X", 0x000000FF & *p);
 707                         } else if (bytes_read > m) {
 708                         } else
 709                                 d += sprintf(d, " ..");
 710                         if (copy_to_user(buffer++, p, 1)) {
 711                                 return -EFAULT;
 712                         } else {
 713                                 bytes_read += 1;
 714                                 goto have;
 715                         }
 716                 } else
 717                         return bytes_read;
 718         }
 719       more:if (count > 0) {
 720                 int packet_bytes = 0;
 721                 int retval = usb_bulk_msg(ftdi->udev,
 722                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 723                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 724                         &packet_bytes, msecs_to_jiffies(50));
 725                 if (packet_bytes > 2) {
 726                         ftdi->bulk_in_left = packet_bytes - 2;
 727                         ftdi->bulk_in_last = 1;
 728                         goto have;
 729                 } else if (retval == -ETIMEDOUT) {
 730                         if (retry_on_timeout-- > 0) {
 731                                 goto more;
 732                         } else if (bytes_read > 0) {
 733                                 return bytes_read;
 734                         } else
 735                                 return retval;
 736                 } else if (retval == 0) {
 737                         if (retry_on_empty-- > 0) {
 738                                 goto more;
 739                         } else
 740                                 return bytes_read;
 741                 } else
 742                         return retval;
 743         } else
 744                 return bytes_read;
 745 }
 746
 747 static void ftdi_elan_write_bulk_callback(struct urb *urb)
 748 {
 749         struct usb_ftdi *ftdi = (struct usb_ftdi *)urb->context;
 750         if (urb->status && !(urb->status == -ENOENT || urb->status ==
 751                 -ECONNRESET || urb->status == -ESHUTDOWN)) {
 752                 dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %"
 753                         "d\n", urb, urb->status);
 754         }
 755         usb_buffer_free(urb->dev, urb->transfer_buffer_length,
 756                 urb->transfer_buffer, urb->transfer_dma);
 757 }
 758
 759 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 760         char *buf, int command_size, int total_size)
 761 {
 762         int ed_commands = 0;
 763         int b = 0;
 764         int I = command_size;
 765         int i = ftdi->command_head;
 766         while (I-- > 0) {
 767                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 768                         i++];
 769                 int F = command->follows;
 770                 u8 *f = command->buffer;
 771                 if (command->header & 0x80) {
 772                         ed_commands |= 1 << (0x3 & (command->header >> 5));
 773                 }
 774                 buf[b++] = command->header;
 775                 buf[b++] = (command->length >> 0) & 0x00FF;
 776                 buf[b++] = (command->length >> 8) & 0x00FF;
 777                 buf[b++] = command->address;
 778                 buf[b++] = command->width;
 779                 while (F-- > 0) {
 780                         buf[b++] = *f++;
 781                 }
 782         }
 783         return ed_commands;
 784 }
 785
 786 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 787 {
 788         int total_size = 0;
 789         int I = command_size;
 790         int i = ftdi->command_head;
 791         while (I-- > 0) {
 792                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 793                         i++];
 794                 total_size += 5 + command->follows;
 795         } return total_size;
 796 }
 797
 798 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 799 {
 800         int retval;
 801         char *buf;
 802         int ed_commands;
 803         int total_size;
 804         struct urb *urb;
 805         int command_size = ftdi->command_next - ftdi->command_head;
 806         if (command_size == 0)
 807                 return 0;
 808         total_size = ftdi_elan_total_command_size(ftdi, command_size);
 809         urb = usb_alloc_urb(0, GFP_KERNEL);
 810         if (!urb) {
 811                 dev_err(&ftdi->udev->dev, "could not get a urb to write %d comm"
 812                         "ands totaling %d bytes to the Uxxx\n", command_size,
 813                         total_size);
 814                 return -ENOMEM;
 815         }
 816         buf = usb_buffer_alloc(ftdi->udev, total_size, GFP_KERNEL,
 817                 &urb->transfer_dma);
 818         if (!buf) {
 819                 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d c"
 820                         "ommands totaling %d bytes to the Uxxx\n", command_size,
 821                          total_size);
 822                 usb_free_urb(urb);
 823                 return -ENOMEM;
 824         }
 825         ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 826                 command_size, total_size);
 827         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 828                 ftdi->bulk_out_endpointAddr), buf, total_size,
 829                 ftdi_elan_write_bulk_callback, ftdi);
 830         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 831         if (ed_commands) {
 832                 char diag[40 *3 + 4];
 833                 char *d = diag;
 834                 int m = total_size;
 835                 u8 *c = buf;
 836                 int s = (sizeof(diag) - 1) / 3;
 837                 diag[0] = 0;
 838                 while (s-- > 0 && m-- > 0) {
 839                         if (s > 0 || m == 0) {
 840                                 d += sprintf(d, " %02X", *c++);
 841                         } else
 842                                 d += sprintf(d, " ..");
 843                 }
 844         }
 845         retval = usb_submit_urb(urb, GFP_KERNEL);
 846         if (retval) {
 847                 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write "
 848                         "%d commands totaling %d bytes to the Uxxx\n", retval,
 849                         urb, command_size, total_size);
 850                 usb_buffer_free(ftdi->udev, total_size, buf, urb->transfer_dma);
 851                 usb_free_urb(urb);
 852                 return retval;
 853         }
 854         usb_free_urb(urb);        /* release our reference to this urb,
 855                 the USB core will eventually free it entirely */
 856         ftdi->command_head += command_size;
 857         ftdi_elan_kick_respond_queue(ftdi);
 858         return 0;
 859 }
 860
 861 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 862         struct u132_target *target, u8 *buffer, int length)
 863 {
 864         struct urb *urb = target->urb;
 865         int halted = target->halted;
 866         int skipped = target->skipped;
 867         int actual = target->actual;
 868         int non_null = target->non_null;
 869         int toggle_bits = target->toggle_bits;
 870         int error_count = target->error_count;
 871         int condition_code = target->condition_code;
 872         int repeat_number = target->repeat_number;
 873         void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 874                 int, int, int, int) = target->callback;
 875         target->active -= 1;
 876         target->callback = NULL;
 877         (*callback) (target->endp, urb, buffer, length, toggle_bits,
 878                 error_count, condition_code, repeat_number, halted, skipped,
 879                 actual, non_null);
 880 }
 881
 882 static char *have_ed_set_response(struct usb_ftdi *ftdi,
 883         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 884         char *b)
 885 {
 886         int payload = (ed_length >> 0) & 0x07FF;
 887         down(&ftdi->u132_lock);
 888         target->actual = 0;
 889         target->non_null = (ed_length >> 15) & 0x0001;
 890         target->repeat_number = (ed_length >> 11) & 0x000F;
 891         if (ed_type == 0x02) {
 892                 if (payload == 0 || target->abandoning > 0) {
 893                         target->abandoning = 0;
 894                         up(&ftdi->u132_lock);
 895                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 896                                 payload);
 897                         ftdi->recieved = 0;
 898                         ftdi->expected = 4;
 899                         ftdi->ed_found = 0;
 900                         return ftdi->response;
 901                 } else {
 902                         ftdi->expected = 4 + payload;
 903                         ftdi->ed_found = 1;
 904                         up(&ftdi->u132_lock);
 905                         return b;
 906                 }
 907         } else if (ed_type == 0x03) {
 908                 if (payload == 0 || target->abandoning > 0) {
 909                         target->abandoning = 0;
 910                         up(&ftdi->u132_lock);
 911                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 912                                 payload);
 913                         ftdi->recieved = 0;
 914                         ftdi->expected = 4;
 915                         ftdi->ed_found = 0;
 916                         return ftdi->response;
 917                 } else {
 918                         ftdi->expected = 4 + payload;
 919                         ftdi->ed_found = 1;
 920                         up(&ftdi->u132_lock);
 921                         return b;
 922                 }
 923         } else if (ed_type == 0x01) {
 924                 target->abandoning = 0;
 925                 up(&ftdi->u132_lock);
 926                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 927                         payload);
 928                 ftdi->recieved = 0;
 929                 ftdi->expected = 4;
 930                 ftdi->ed_found = 0;
 931                 return ftdi->response;
 932         } else {
 933                 target->abandoning = 0;
 934                 up(&ftdi->u132_lock);
 935                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 936                         payload);
 937                 ftdi->recieved = 0;
 938                 ftdi->expected = 4;
 939                 ftdi->ed_found = 0;
 940                 return ftdi->response;
 941         }
 942 }
 943
 944 static char *have_ed_get_response(struct usb_ftdi *ftdi,
 945         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 946         char *b)
 947 {
 948         down(&ftdi->u132_lock);
 949         target->condition_code = TD_DEVNOTRESP;
 950         target->actual = (ed_length >> 0) & 0x01FF;
 951         target->non_null = (ed_length >> 15) & 0x0001;
 952         target->repeat_number = (ed_length >> 11) & 0x000F;
 953         up(&ftdi->u132_lock);
 954         if (target->active)
 955                 ftdi_elan_do_callback(ftdi, target, NULL, 0);
 956         target->abandoning = 0;
 957         ftdi->recieved = 0;
 958         ftdi->expected = 4;
 959         ftdi->ed_found = 0;
 960         return ftdi->response;
 961 }
 962
 963
 964 /*
 965 * The engine tries to empty the FTDI fifo
 966 *
 967 * all responses found in the fifo data are dispatched thus
 968 * the response buffer can only ever hold a maximum sized
 969 * response from the Uxxx.
 970 *
 971 */
 972 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 973 {
 974         u8 *b = ftdi->response + ftdi->recieved;
 975         int bytes_read = 0;
 976         int retry_on_empty = 1;
 977         int retry_on_timeout = 3;
 978         int empty_packets = 0;
 979       read:{
 980                 int packet_bytes = 0;
 981                 int retval = usb_bulk_msg(ftdi->udev,
 982                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 983                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 984                         &packet_bytes, msecs_to_jiffies(500));
 985                 char diag[30 *3 + 4];
 986                 char *d = diag;
 987                 int m = packet_bytes;
 988                 u8 *c = ftdi->bulk_in_buffer;
 989                 int s = (sizeof(diag) - 1) / 3;
 990                 diag[0] = 0;
 991                 while (s-- > 0 && m-- > 0) {
 992                         if (s > 0 || m == 0) {
 993                                 d += sprintf(d, " %02X", *c++);
 994                         } else
 995                                 d += sprintf(d, " ..");
 996                 }
 997                 if (packet_bytes > 2) {
 998                         ftdi->bulk_in_left = packet_bytes - 2;
 999                         ftdi->bulk_in_last = 1;
1000                         goto have;
1001                 } else if (retval == -ETIMEDOUT) {
1002                         if (retry_on_timeout-- > 0) {
1003                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
1004                                         "t_bytes = %d with total %d bytes%s\n",
1005                                         packet_bytes, bytes_read, diag);
1006                                 goto more;
1007                         } else if (bytes_read > 0) {
1008                                 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
1009                                         bytes_read, diag);
1010                                 return -ENOMEM;
1011                         } else {
1012                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
1013                                         "t_bytes = %d with total %d bytes%s\n",
1014                                         packet_bytes, bytes_read, diag);
1015                                 return -ENOMEM;
1016                         }
1017                 } else if (retval == -EILSEQ) {
1018                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1019                                 " = %d with total %d bytes%s\n", retval,
1020                                 packet_bytes, bytes_read, diag);
1021                         return retval;
1022                 } else if (retval) {
1023                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1024                                 " = %d with total %d bytes%s\n", retval,
1025                                 packet_bytes, bytes_read, diag);
1026                         return retval;
1027                 } else if (packet_bytes == 2) {
1028                         unsigned char s0 = ftdi->bulk_in_buffer[0];
1029                         unsigned char s1 = ftdi->bulk_in_buffer[1];
1030                         empty_packets += 1;
1031                         if (s0 == 0x31 && s1 == 0x60) {
1032                                 if (retry_on_empty-- > 0) {
1033                                         goto more;
1034                                 } else
1035                                         return 0;
1036                         } else if (s0 == 0x31 && s1 == 0x00) {
1037                                 if (retry_on_empty-- > 0) {
1038                                         goto more;
1039                                 } else
1040                                         return 0;
1041                         } else {
1042                                 if (retry_on_empty-- > 0) {
1043                                         goto more;
1044                                 } else
1045                                         return 0;
1046                         }
1047                 } else if (packet_bytes == 1) {
1048                         if (retry_on_empty-- > 0) {
1049                                 goto more;
1050                         } else
1051                                 return 0;
1052                 } else {
1053                         if (retry_on_empty-- > 0) {
1054                                 goto more;
1055                         } else
1056                                 return 0;
1057                 }
1058         }
1059       more:{
1060                 goto read;
1061         }
1062       have:if (ftdi->bulk_in_left > 0) {
1063                 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1064                 bytes_read += 1;
1065                 ftdi->bulk_in_left -= 1;
1066                 if (ftdi->recieved == 0 && c == 0xFF) {
1067                         goto have;
1068                 } else
1069                         *b++ = c;
1070                 if (++ftdi->recieved < ftdi->expected) {
1071                         goto have;
1072                 } else if (ftdi->ed_found) {
1073                         int ed_number = (ftdi->response[0] >> 5) & 0x03;
1074                         u16 ed_length = (ftdi->response[2] << 8) |
1075                                 ftdi->response[1];
1076                         struct u132_target *target = &ftdi->target[ed_number];
1077                         int payload = (ed_length >> 0) & 0x07FF;
1078                         char diag[30 *3 + 4];
1079                         char *d = diag;
1080                         int m = payload;
1081                         u8 *c = 4 + ftdi->response;
1082                         int s = (sizeof(diag) - 1) / 3;
1083                         diag[0] = 0;
1084                         while (s-- > 0 && m-- > 0) {
1085                                 if (s > 0 || m == 0) {
1086                                         d += sprintf(d, " %02X", *c++);
1087                                 } else
1088                                         d += sprintf(d, " ..");
1089                         }
1090                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1091                                 payload);
1092                         ftdi->recieved = 0;
1093                         ftdi->expected = 4;
1094                         ftdi->ed_found = 0;
1095                         b = ftdi->response;
1096                         goto have;
1097                 } else if (ftdi->expected == 8) {
1098                         u8 buscmd;
1099                         int respond_head = ftdi->respond_head++;
1100                         struct u132_respond *respond = &ftdi->respond[
1101                                 RESPOND_MASK & respond_head];
1102                         u32 data = ftdi->response[7];
1103                         data <<= 8;
1104                         data |= ftdi->response[6];
1105                         data <<= 8;
1106                         data |= ftdi->response[5];
1107                         data <<= 8;
1108                         data |= ftdi->response[4];
1109                         *respond->value = data;
1110                         *respond->result = 0;
1111                         complete(&respond->wait_completion);
1112                         ftdi->recieved = 0;
1113                         ftdi->expected = 4;
1114                         ftdi->ed_found = 0;
1115                         b = ftdi->response;
1116                         buscmd = (ftdi->response[0] >> 0) & 0x0F;
1117                         if (buscmd == 0x00) {
1118                         } else if (buscmd == 0x02) {
1119                         } else if (buscmd == 0x06) {
1120                         } else if (buscmd == 0x0A) {
1121                         } else
1122                                 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) va"
1123                                         "lue = %08X\n", buscmd, data);
1124                         goto have;
1125                 } else {
1126                         if ((ftdi->response[0] & 0x80) == 0x00) {
1127                                 ftdi->expected = 8;
1128                                 goto have;
1129                         } else {
1130                                 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1131                                 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1132                                 u16 ed_length = (ftdi->response[2] << 8) |
1133                                         ftdi->response[1];
1134                                 struct u132_target *target = &ftdi->target[
1135                                         ed_number];
1136                                 target->halted = (ftdi->response[0] >> 3) &
1137                                         0x01;
1138                                 target->skipped = (ftdi->response[0] >> 2) &
1139                                         0x01;
1140                                 target->toggle_bits = (ftdi->response[3] >> 6)
1141                                         & 0x03;
1142                                 target->error_count = (ftdi->response[3] >> 4)
1143                                         & 0x03;
1144                                 target->condition_code = (ftdi->response[
1145                                         3] >> 0) & 0x0F;
1146                                 if ((ftdi->response[0] & 0x10) == 0x00) {
1147                                         b = have_ed_set_response(ftdi, target,
1148                                                 ed_length, ed_number, ed_type,
1149                                                 b);
1150                                         goto have;
1151                                 } else {
1152                                         b = have_ed_get_response(ftdi, target,
1153                                                 ed_length, ed_number, ed_type,
1154                                                 b);
1155                                         goto have;
1156                                 }
1157                         }
1158                 }
1159         } else
1160                 goto more;
1161 }
1162
1163
1164 /*
1165 * create a urb, and a buffer for it, and copy the data to the urb
1166 *
1167 */
1168 static ssize_t ftdi_elan_write(struct file *file,
1169                                const char __user *user_buffer, size_t count,
1170                                loff_t *ppos)
1171 {
1172         int retval = 0;
1173         struct urb *urb;
1174         char *buf;
1175         struct usb_ftdi *ftdi = file->private_data;
1176
1177         if (ftdi->disconnected > 0) {
1178                 return -ENODEV;
1179         }
1180         if (count == 0) {
1181                 goto exit;
1182         }
1183         urb = usb_alloc_urb(0, GFP_KERNEL);
1184         if (!urb) {
1185                 retval = -ENOMEM;
1186                 goto error_1;
1187         }
1188         buf = usb_buffer_alloc(ftdi->udev, count, GFP_KERNEL,
1189                 &urb->transfer_dma);
1190         if (!buf) {
1191                 retval = -ENOMEM;
1192                 goto error_2;
1193         }
1194         if (copy_from_user(buf, user_buffer, count)) {
1195                 retval = -EFAULT;
1196                 goto error_3;
1197         }
1198         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1199                 ftdi->bulk_out_endpointAddr), buf, count,
1200                 ftdi_elan_write_bulk_callback, ftdi);
1201         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1202         retval = usb_submit_urb(urb, GFP_KERNEL);
1203         if (retval) {
1204                 dev_err(&ftdi->udev->dev, "failed submitting write urb, error %"
1205                         "d\n", retval);
1206                 goto error_3;
1207         }
1208         usb_free_urb(urb);
1209
1210 exit:
1211         return count;
1212 error_3:
1213         usb_buffer_free(ftdi->udev, count, buf, urb->transfer_dma);
1214 error_2:
1215         usb_free_urb(urb);
1216 error_1:
1217         return retval;
1218 }
1219
1220 static const struct file_operations ftdi_elan_fops = {
1221         .owner = THIS_MODULE,
1222         .llseek = no_llseek,
1223         .ioctl = ftdi_elan_ioctl,
1224         .read = ftdi_elan_read,
1225         .write = ftdi_elan_write,
1226         .open = ftdi_elan_open,
1227         .release = ftdi_elan_release,
1228 };
1229
1230 /*
1231 * usb class driver info in order to get a minor number from the usb core,
1232 * and to have the device registered with the driver core
1233 */
1234 static struct usb_class_driver ftdi_elan_jtag_class = {
1235         .name = "ftdi-%d-jtag",
1236         .fops = &ftdi_elan_fops,
1237         .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1238 };
1239
1240 /*
1241 * the following definitions are for the
1242 * ELAN FPGA state machgine processor that
1243 * lies on the other side of the FTDI chip
1244 */
1245 #define cPCIu132rd 0x0
1246 #define cPCIu132wr 0x1
1247 #define cPCIiord 0x2
1248 #define cPCIiowr 0x3
1249 #define cPCImemrd 0x6
1250 #define cPCImemwr 0x7
1251 #define cPCIcfgrd 0xA
1252 #define cPCIcfgwr 0xB
1253 #define cPCInull 0xF
1254 #define cU132cmd_status 0x0
1255 #define cU132flash 0x1
1256 #define cPIDsetup 0x0
1257 #define cPIDout 0x1
1258 #define cPIDin 0x2
1259 #define cPIDinonce 0x3
1260 #define cCCnoerror 0x0
1261 #define cCCcrc 0x1
1262 #define cCCbitstuff 0x2
1263 #define cCCtoggle 0x3
1264 #define cCCstall 0x4
1265 #define cCCnoresp 0x5
1266 #define cCCbadpid1 0x6
1267 #define cCCbadpid2 0x7
1268 #define cCCdataoverrun 0x8
1269 #define cCCdataunderrun 0x9
1270 #define cCCbuffoverrun 0xC
1271 #define cCCbuffunderrun 0xD
1272 #define cCCnotaccessed 0xF
1273 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1274 {
1275       wait:if (ftdi->disconnected > 0) {
1276                 return -ENODEV;
1277         } else {
1278                 int command_size;
1279                 down(&ftdi->u132_lock);
1280                 command_size = ftdi->command_next - ftdi->command_head;
1281                 if (command_size < COMMAND_SIZE) {
1282                         struct u132_command *command = &ftdi->command[
1283                                 COMMAND_MASK & ftdi->command_next];
1284                         command->header = 0x00 | cPCIu132wr;
1285                         command->length = 0x04;
1286                         command->address = 0x00;
1287                         command->width = 0x00;
1288                         command->follows = 4;
1289                         command->value = data;
1290                         command->buffer = &command->value;
1291                         ftdi->command_next += 1;
1292                         ftdi_elan_kick_command_queue(ftdi);
1293                         up(&ftdi->u132_lock);
1294                         return 0;
1295                 } else {
1296                         up(&ftdi->u132_lock);
1297                         msleep(100);
1298                         goto wait;
1299                 }
1300         }
1301 }
1302
1303 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1304         u8 width, u32 data)
1305 {
1306         u8 addressofs = config_offset / 4;
1307       wait:if (ftdi->disconnected > 0) {
1308                 return -ENODEV;
1309         } else {
1310                 int command_size;
1311                 down(&ftdi->u132_lock);
1312                 command_size = ftdi->command_next - ftdi->command_head;
1313                 if (command_size < COMMAND_SIZE) {
1314                         struct u132_command *command = &ftdi->command[
1315                                 COMMAND_MASK & ftdi->command_next];
1316                         command->header = 0x00 | (cPCIcfgwr & 0x0F);
1317                         command->length = 0x04;
1318                         command->address = addressofs;
1319                         command->width = 0x00 | (width & 0x0F);
1320                         command->follows = 4;
1321                         command->value = data;
1322                         command->buffer = &command->value;
1323                         ftdi->command_next += 1;
1324                         ftdi_elan_kick_command_queue(ftdi);
1325                         up(&ftdi->u132_lock);
1326                         return 0;
1327                 } else {
1328                         up(&ftdi->u132_lock);
1329                         msleep(100);
1330                         goto wait;
1331                 }
1332         }
1333 }
1334
1335 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1336         u8 width, u32 data)
1337 {
1338         u8 addressofs = mem_offset / 4;
1339       wait:if (ftdi->disconnected > 0) {
1340                 return -ENODEV;
1341         } else {
1342                 int command_size;
1343                 down(&ftdi->u132_lock);
1344                 command_size = ftdi->command_next - ftdi->command_head;
1345                 if (command_size < COMMAND_SIZE) {
1346                         struct u132_command *command = &ftdi->command[
1347                                 COMMAND_MASK & ftdi->command_next];
1348                         command->header = 0x00 | (cPCImemwr & 0x0F);
1349                         command->length = 0x04;
1350                         command->address = addressofs;
1351                         command->width = 0x00 | (width & 0x0F);
1352                         command->follows = 4;
1353                         command->value = data;
1354                         command->buffer = &command->value;
1355                         ftdi->command_next += 1;
1356                         ftdi_elan_kick_command_queue(ftdi);
1357                         up(&ftdi->u132_lock);
1358                         return 0;
1359                 } else {
1360                         up(&ftdi->u132_lock);
1361                         msleep(100);
1362                         goto wait;
1363                 }
1364         }
1365 }
1366
1367 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1368         u8 width, u32 data)
1369 {
1370         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1371         return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1372 }
1373
1374
1375 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1376 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1377 {
1378       wait:if (ftdi->disconnected > 0) {
1379                 return -ENODEV;
1380         } else {
1381                 int command_size;
1382                 int respond_size;
1383                 down(&ftdi->u132_lock);
1384                 command_size = ftdi->command_next - ftdi->command_head;
1385                 respond_size = ftdi->respond_next - ftdi->respond_head;
1386                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1387                         {
1388                         struct u132_command *command = &ftdi->command[
1389                                 COMMAND_MASK & ftdi->command_next];
1390                         struct u132_respond *respond = &ftdi->respond[
1391                                 RESPOND_MASK & ftdi->respond_next];
1392                         int result = -ENODEV;
1393                         respond->result = &result;
1394                         respond->header = command->header = 0x00 | cPCIu132rd;
1395                         command->length = 0x04;
1396                         respond->address = command->address = cU132cmd_status;
1397                         command->width = 0x00;
1398                         command->follows = 0;
1399                         command->value = 0;
1400                         command->buffer = NULL;
1401                         respond->value = data;
1402                         init_completion(&respond->wait_completion);
1403                         ftdi->command_next += 1;
1404                         ftdi->respond_next += 1;
1405                         ftdi_elan_kick_command_queue(ftdi);
1406                         up(&ftdi->u132_lock);
1407                         wait_for_completion(&respond->wait_completion);
1408                         return result;
1409                 } else {
1410                         up(&ftdi->u132_lock);
1411                         msleep(100);
1412                         goto wait;
1413                 }
1414         }
1415 }
1416
1417 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1418         u8 width, u32 *data)
1419 {
1420         u8 addressofs = config_offset / 4;
1421       wait:if (ftdi->disconnected > 0) {
1422                 return -ENODEV;
1423         } else {
1424                 int command_size;
1425                 int respond_size;
1426                 down(&ftdi->u132_lock);
1427                 command_size = ftdi->command_next - ftdi->command_head;
1428                 respond_size = ftdi->respond_next - ftdi->respond_head;
1429                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1430                         {
1431                         struct u132_command *command = &ftdi->command[
1432                                 COMMAND_MASK & ftdi->command_next];
1433                         struct u132_respond *respond = &ftdi->respond[
1434                                 RESPOND_MASK & ftdi->respond_next];
1435                         int result = -ENODEV;
1436                         respond->result = &result;
1437                         respond->header = command->header = 0x00 | (cPCIcfgrd &
1438                                 0x0F);
1439                         command->length = 0x04;
1440                         respond->address = command->address = addressofs;
1441                         command->width = 0x00 | (width & 0x0F);
1442                         command->follows = 0;
1443                         command->value = 0;
1444                         command->buffer = NULL;
1445                         respond->value = data;
1446                         init_completion(&respond->wait_completion);
1447                         ftdi->command_next += 1;
1448                         ftdi->respond_next += 1;
1449                         ftdi_elan_kick_command_queue(ftdi);
1450                         up(&ftdi->u132_lock);
1451                         wait_for_completion(&respond->wait_completion);
1452                         return result;
1453                 } else {
1454                         up(&ftdi->u132_lock);
1455                         msleep(100);
1456                         goto wait;
1457                 }
1458         }
1459 }
1460
1461 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1462         u8 width, u32 *data)
1463 {
1464         u8 addressofs = mem_offset / 4;
1465       wait:if (ftdi->disconnected > 0) {
1466                 return -ENODEV;
1467         } else {
1468                 int command_size;
1469                 int respond_size;
1470                 down(&ftdi->u132_lock);
1471                 command_size = ftdi->command_next - ftdi->command_head;
1472                 respond_size = ftdi->respond_next - ftdi->respond_head;
1473                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1474                         {
1475                         struct u132_command *command = &ftdi->command[
1476                                 COMMAND_MASK & ftdi->command_next];
1477                         struct u132_respond *respond = &ftdi->respond[
1478                                 RESPOND_MASK & ftdi->respond_next];
1479                         int result = -ENODEV;
1480                         respond->result = &result;
1481                         respond->header = command->header = 0x00 | (cPCImemrd &
1482                                 0x0F);
1483                         command->length = 0x04;
1484                         respond->address = command->address = addressofs;
1485                         command->width = 0x00 | (width & 0x0F);
1486                         command->follows = 0;
1487                         command->value = 0;
1488                         command->buffer = NULL;
1489                         respond->value = data;
1490                         init_completion(&respond->wait_completion);
1491                         ftdi->command_next += 1;
1492                         ftdi->respond_next += 1;
1493                         ftdi_elan_kick_command_queue(ftdi);
1494                         up(&ftdi->u132_lock);
1495                         wait_for_completion(&respond->wait_completion);
1496                         return result;
1497                 } else {
1498                         up(&ftdi->u132_lock);
1499                         msleep(100);
1500                         goto wait;
1501                 }
1502         }
1503 }
1504
1505 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1506         u8 width, u32 *data)
1507 {
1508         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1509         if (ftdi->initialized == 0) {
1510                 return -ENODEV;
1511         } else
1512                 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1513 }
1514
1515
1516 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1517 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1518         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1519         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1520         int toggle_bits, int error_count, int condition_code, int repeat_number,
1521          int halted, int skipped, int actual, int non_null))
1522 {
1523         u8 ed = ed_number - 1;
1524       wait:if (ftdi->disconnected > 0) {
1525                 return -ENODEV;
1526         } else if (ftdi->initialized == 0) {
1527                 return -ENODEV;
1528         } else {
1529                 int command_size;
1530                 down(&ftdi->u132_lock);
1531                 command_size = ftdi->command_next - ftdi->command_head;
1532                 if (command_size < COMMAND_SIZE) {
1533                         struct u132_target *target = &ftdi->target[ed];
1534                         struct u132_command *command = &ftdi->command[
1535                                 COMMAND_MASK & ftdi->command_next];
1536                         command->header = 0x80 | (ed << 5);
1537                         command->length = 0x8007;
1538                         command->address = (toggle_bits << 6) | (ep_number << 2)
1539                                 | (address << 0);
1540                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1541                                 usb_pipeout(urb->pipe));
1542                         command->follows = 8;
1543                         command->value = 0;
1544                         command->buffer = urb->setup_packet;
1545                         target->callback = callback;
1546                         target->endp = endp;
1547                         target->urb = urb;
1548                         target->active = 1;
1549                         ftdi->command_next += 1;
1550                         ftdi_elan_kick_command_queue(ftdi);
1551                         up(&ftdi->u132_lock);
1552                         return 0;
1553                 } else {
1554                         up(&ftdi->u132_lock);
1555                         msleep(100);
1556                         goto wait;
1557                 }
1558         }
1559 }
1560
1561 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1562         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1563         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1564         int toggle_bits, int error_count, int condition_code, int repeat_number,
1565          int halted, int skipped, int actual, int non_null))
1566 {
1567         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1568         return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1569                 ep_number, toggle_bits, callback);
1570 }
1571
1572
1573 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1574 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1575         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1576         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1577         int toggle_bits, int error_count, int condition_code, int repeat_number,
1578          int halted, int skipped, int actual, int non_null))
1579 {
1580         u8 ed = ed_number - 1;
1581       wait:if (ftdi->disconnected > 0) {
1582                 return -ENODEV;
1583         } else if (ftdi->initialized == 0) {
1584                 return -ENODEV;
1585         } else {
1586                 int command_size;
1587                 down(&ftdi->u132_lock);
1588                 command_size = ftdi->command_next - ftdi->command_head;
1589                 if (command_size < COMMAND_SIZE) {
1590                         struct u132_target *target = &ftdi->target[ed];
1591                         struct u132_command *command = &ftdi->command[
1592                                 COMMAND_MASK & ftdi->command_next];
1593                         int remaining_length = urb->transfer_buffer_length -
1594                                 urb->actual_length;
1595                         command->header = 0x82 | (ed << 5);
1596                         if (remaining_length == 0) {
1597                                 command->length = 0x0000;
1598                         } else if (remaining_length > 1024) {
1599                                 command->length = 0x8000 | 1023;
1600                         } else
1601                                 command->length = 0x8000 | (remaining_length -
1602                                         1);
1603                         command->address = (toggle_bits << 6) | (ep_number << 2)
1604                                 | (address << 0);
1605                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1606                                 usb_pipeout(urb->pipe));
1607                         command->follows = 0;
1608                         command->value = 0;
1609                         command->buffer = NULL;
1610                         target->callback = callback;
1611                         target->endp = endp;
1612                         target->urb = urb;
1613                         target->active = 1;
1614                         ftdi->command_next += 1;
1615                         ftdi_elan_kick_command_queue(ftdi);
1616                         up(&ftdi->u132_lock);
1617                         return 0;
1618                 } else {
1619                         up(&ftdi->u132_lock);
1620                         msleep(100);
1621                         goto wait;
1622                 }
1623         }
1624 }
1625
1626 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1627         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1628         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1629         int toggle_bits, int error_count, int condition_code, int repeat_number,
1630          int halted, int skipped, int actual, int non_null))
1631 {
1632         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1633         return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1634                 ep_number, toggle_bits, callback);
1635 }
1636
1637
1638 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1639 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1640         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1641         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1642         int toggle_bits, int error_count, int condition_code, int repeat_number,
1643          int halted, int skipped, int actual, int non_null))
1644 {
1645         u8 ed = ed_number - 1;
1646       wait:if (ftdi->disconnected > 0) {
1647                 return -ENODEV;
1648         } else if (ftdi->initialized == 0) {
1649                 return -ENODEV;
1650         } else {
1651                 int command_size;
1652                 down(&ftdi->u132_lock);
1653                 command_size = ftdi->command_next - ftdi->command_head;
1654                 if (command_size < COMMAND_SIZE) {
1655                         struct u132_target *target = &ftdi->target[ed];
1656                         struct u132_command *command = &ftdi->command[
1657                                 COMMAND_MASK & ftdi->command_next];
1658                         command->header = 0x81 | (ed << 5);
1659                         command->length = 0x0000;
1660                         command->address = (toggle_bits << 6) | (ep_number << 2)
1661                                 | (address << 0);
1662                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1663                                 usb_pipeout(urb->pipe));
1664                         command->follows = 0;
1665                         command->value = 0;
1666                         command->buffer = NULL;
1667                         target->callback = callback;
1668                         target->endp = endp;
1669                         target->urb = urb;
1670                         target->active = 1;
1671                         ftdi->command_next += 1;
1672                         ftdi_elan_kick_command_queue(ftdi);
1673                         up(&ftdi->u132_lock);
1674                         return 0;
1675                 } else {
1676                         up(&ftdi->u132_lock);
1677                         msleep(100);
1678                         goto wait;
1679                 }
1680         }
1681 }
1682
1683 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1684         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1685         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1686         int toggle_bits, int error_count, int condition_code, int repeat_number,
1687          int halted, int skipped, int actual, int non_null))
1688 {
1689         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1690         return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1691                 ep_number, toggle_bits, callback);
1692 }
1693
1694
1695 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1696 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1697         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1698         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1699         int toggle_bits, int error_count, int condition_code, int repeat_number,
1700          int halted, int skipped, int actual, int non_null))
1701 {
1702         u8 ed = ed_number - 1;
1703       wait:if (ftdi->disconnected > 0) {
1704                 return -ENODEV;
1705         } else if (ftdi->initialized == 0) {
1706                 return -ENODEV;
1707         } else {
1708                 int command_size;
1709                 down(&ftdi->u132_lock);
1710                 command_size = ftdi->command_next - ftdi->command_head;
1711                 if (command_size < COMMAND_SIZE) {
1712                         u8 *b;
1713                         u16 urb_size;
1714                         int i = 0;
1715                         char data[30 *3 + 4];
1716                         char *d = data;
1717                         int m = (sizeof(data) - 1) / 3;
1718                         int l = 0;
1719                         struct u132_target *target = &ftdi->target[ed];
1720                         struct u132_command *command = &ftdi->command[
1721                                 COMMAND_MASK & ftdi->command_next];
1722                         command->header = 0x81 | (ed << 5);
1723                         command->address = (toggle_bits << 6) | (ep_number << 2)
1724                                 | (address << 0);
1725                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1726                                 usb_pipeout(urb->pipe));
1727                         command->follows = min(1024,
1728                                 urb->transfer_buffer_length -
1729                                 urb->actual_length);
1730                         command->value = 0;
1731                         command->buffer = urb->transfer_buffer +
1732                                 urb->actual_length;
1733                         command->length = 0x8000 | (command->follows - 1);
1734                         b = command->buffer;
1735                         urb_size = command->follows;
1736                         data[0] = 0;
1737                         while (urb_size-- > 0) {
1738                                 if (i > m) {
1739                                 } else if (i++ < m) {
1740                                         int w = sprintf(d, " %02X", *b++);
1741                                         d += w;
1742                                         l += w;
1743                                 } else
1744                                         d += sprintf(d, " ..");
1745                         }
1746                         target->callback = callback;
1747                         target->endp = endp;
1748                         target->urb = urb;
1749                         target->active = 1;
1750                         ftdi->command_next += 1;
1751                         ftdi_elan_kick_command_queue(ftdi);
1752                         up(&ftdi->u132_lock);
1753                         return 0;
1754                 } else {
1755                         up(&ftdi->u132_lock);
1756                         msleep(100);
1757                         goto wait;
1758                 }
1759         }
1760 }
1761
1762 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1763         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1764         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1765         int toggle_bits, int error_count, int condition_code, int repeat_number,
1766          int halted, int skipped, int actual, int non_null))
1767 {
1768         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1769         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1770                 ep_number, toggle_bits, callback);
1771 }
1772
1773
1774 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1775 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1776         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1777         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1778         int toggle_bits, int error_count, int condition_code, int repeat_number,
1779          int halted, int skipped, int actual, int non_null))
1780 {
1781         u8 ed = ed_number - 1;
1782       wait:if (ftdi->disconnected > 0) {
1783                 return -ENODEV;
1784         } else if (ftdi->initialized == 0) {
1785                 return -ENODEV;
1786         } else {
1787                 int command_size;
1788                 down(&ftdi->u132_lock);
1789                 command_size = ftdi->command_next - ftdi->command_head;
1790                 if (command_size < COMMAND_SIZE) {
1791                         int remaining_length = urb->transfer_buffer_length -
1792                                 urb->actual_length;
1793                         struct u132_target *target = &ftdi->target[ed];
1794                         struct u132_command *command = &ftdi->command[
1795                                 COMMAND_MASK & ftdi->command_next];
1796                         command->header = 0x83 | (ed << 5);
1797                         if (remaining_length == 0) {
1798                                 command->length = 0x0000;
1799                         } else if (remaining_length > 1024) {
1800                                 command->length = 0x8000 | 1023;
1801                         } else
1802                                 command->length = 0x8000 | (remaining_length -
1803                                         1);
1804                         command->address = (toggle_bits << 6) | (ep_number << 2)
1805                                 | (address << 0);
1806                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1807                                 usb_pipeout(urb->pipe));
1808                         command->follows = 0;
1809                         command->value = 0;
1810                         command->buffer = NULL;
1811                         target->callback = callback;
1812                         target->endp = endp;
1813                         target->urb = urb;
1814                         target->active = 1;
1815                         ftdi->command_next += 1;
1816                         ftdi_elan_kick_command_queue(ftdi);
1817                         up(&ftdi->u132_lock);
1818                         return 0;
1819                 } else {
1820                         up(&ftdi->u132_lock);
1821                         msleep(100);
1822                         goto wait;
1823                 }
1824         }
1825 }
1826
1827 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1828         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1829         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1830         int toggle_bits, int error_count, int condition_code, int repeat_number,
1831          int halted, int skipped, int actual, int non_null))
1832 {
1833         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1834         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1835                 ep_number, toggle_bits, callback);
1836 }
1837
1838
1839 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1840 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1841         void *endp)
1842 {
1843         u8 ed = ed_number - 1;
1844         if (ftdi->disconnected > 0) {
1845                 return -ENODEV;
1846         } else if (ftdi->initialized == 0) {
1847                 return -ENODEV;
1848         } else {
1849                 struct u132_target *target = &ftdi->target[ed];
1850                 down(&ftdi->u132_lock);
1851                 if (target->abandoning > 0) {
1852                         up(&ftdi->u132_lock);
1853                         return 0;
1854                 } else {
1855                         target->abandoning = 1;
1856                       wait_1:if (target->active == 1) {
1857                                 int command_size = ftdi->command_next -
1858                                         ftdi->command_head;
1859                                 if (command_size < COMMAND_SIZE) {
1860                                         struct u132_command *command =
1861                                                 &ftdi->command[COMMAND_MASK &
1862                                                 ftdi->command_next];
1863                                         command->header = 0x80 | (ed << 5) |
1864                                                 0x4;
1865                                         command->length = 0x00;
1866                                         command->address = 0x00;
1867                                         command->width = 0x00;
1868                                         command->follows = 0;
1869                                         command->value = 0;
1870                                         command->buffer = &command->value;
1871                                         ftdi->command_next += 1;
1872                                         ftdi_elan_kick_command_queue(ftdi);
1873                                 } else {
1874                                         up(&ftdi->u132_lock);
1875                                         msleep(100);
1876                                         down(&ftdi->u132_lock);
1877                                         goto wait_1;
1878                                 }
1879                         }
1880                         up(&ftdi->u132_lock);
1881                         return 0;
1882                 }
1883         }
1884 }
1885
1886 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1887         void *endp)
1888 {
1889         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1890         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1891 }
1892
1893
1894 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1895 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1896 {
1897         int retry_on_empty = 10;
1898         int retry_on_timeout = 5;
1899         int retry_on_status = 20;
1900       more:{
1901                 int packet_bytes = 0;
1902                 int retval = usb_bulk_msg(ftdi->udev,
1903                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1904                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1905                         &packet_bytes, msecs_to_jiffies(100));
1906                 if (packet_bytes > 2) {
1907                         char diag[30 *3 + 4];
1908                         char *d = diag;
1909                         int m = (sizeof(diag) - 1) / 3;
1910                         char *b = ftdi->bulk_in_buffer;
1911                         int bytes_read = 0;
1912                         diag[0] = 0;
1913                         while (packet_bytes-- > 0) {
1914                                 char c = *b++;
1915                                 if (bytes_read < m) {
1916                                         d += sprintf(d, " %02X",
1917                                                 0x000000FF & c);
1918                                 } else if (bytes_read > m) {
1919                                 } else
1920                                         d += sprintf(d, " ..");
1921                                 bytes_read += 1;
1922                                 continue;
1923                         }
1924                         goto more;
1925                 } else if (packet_bytes > 1) {
1926                         char s1 = ftdi->bulk_in_buffer[0];
1927                         char s2 = ftdi->bulk_in_buffer[1];
1928                         if (s1 == 0x31 && s2 == 0x60) {
1929                                 return 0;
1930                         } else if (retry_on_status-- > 0) {
1931                                 goto more;
1932                         } else {
1933                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1934                                         "imit reached\n");
1935                                 return -EFAULT;
1936                         }
1937                 } else if (packet_bytes > 0) {
1938                         char b1 = ftdi->bulk_in_buffer[0];
1939                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
1940                                 "TDI = %02X\n", b1);
1941                         if (retry_on_status-- > 0) {
1942                                 goto more;
1943                         } else {
1944                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1945                                         "imit reached\n");
1946                                 return -EFAULT;
1947                         }
1948                 } else if (retval == -ETIMEDOUT) {
1949                         if (retry_on_timeout-- > 0) {
1950                                 goto more;
1951                         } else {
1952                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
1953                                         "t reached\n");
1954                                 return -ENOMEM;
1955                         }
1956                 } else if (retval == 0) {
1957                         if (retry_on_empty-- > 0) {
1958                                 goto more;
1959                         } else {
1960                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
1961                                         "imit reached\n");
1962                                 return -ENOMEM;
1963                         }
1964                 } else {
1965                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1966                         return retval;
1967                 }
1968         }
1969         return -1;
1970 }
1971
1972
1973 /*
1974 * send the long flush sequence
1975 *
1976 */
1977 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1978 {
1979         int retval;
1980         struct urb *urb;
1981         char *buf;
1982         int I = 257;
1983         int i = 0;
1984         urb = usb_alloc_urb(0, GFP_KERNEL);
1985         if (!urb) {
1986                 dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequ"
1987                         "ence\n");
1988                 return -ENOMEM;
1989         }
1990         buf = usb_buffer_alloc(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1991         if (!buf) {
1992                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush seq"
1993                         "uence\n");
1994                 usb_free_urb(urb);
1995                 return -ENOMEM;
1996         }
1997         while (I-- > 0)
1998                 buf[i++] = 0x55;
1999         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2000                 ftdi->bulk_out_endpointAddr), buf, i,
2001                 ftdi_elan_write_bulk_callback, ftdi);
2002         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2003         retval = usb_submit_urb(urb, GFP_KERNEL);
2004         if (retval) {
2005                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
2006                         "flush sequence\n");
2007                 usb_buffer_free(ftdi->udev, i, buf, urb->transfer_dma);
2008                 usb_free_urb(urb);
2009                 return -ENOMEM;
2010         }
2011         usb_free_urb(urb);
2012         return 0;
2013 }
2014
2015
2016 /*
2017 * send the reset sequence
2018 *
2019 */
2020 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
2021 {
2022         int retval;
2023         struct urb *urb;
2024         char *buf;
2025         int I = 4;
2026         int i = 0;
2027         urb = usb_alloc_urb(0, GFP_KERNEL);
2028         if (!urb) {
2029                 dev_err(&ftdi->udev->dev, "could not get a urb for the reset se"
2030                         "quence\n");
2031                 return -ENOMEM;
2032         }
2033         buf = usb_buffer_alloc(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
2034         if (!buf) {
2035                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset"
2036                         " sequence\n");
2037                 usb_free_urb(urb);
2038                 return -ENOMEM;
2039         }
2040         buf[i++] = 0x55;
2041         buf[i++] = 0xAA;
2042         buf[i++] = 0x5A;
2043         buf[i++] = 0xA5;
2044         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2045                 ftdi->bulk_out_endpointAddr), buf, i,
2046                 ftdi_elan_write_bulk_callback, ftdi);
2047         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2048         retval = usb_submit_urb(urb, GFP_KERNEL);
2049         if (retval) {
2050                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
2051                         "reset sequence\n");
2052                 usb_buffer_free(ftdi->udev, i, buf, urb->transfer_dma);
2053                 usb_free_urb(urb);
2054                 return -ENOMEM;
2055         }
2056         usb_free_urb(urb);
2057         return 0;
2058 }
2059
2060 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2061 {
2062         int retval;
2063         int long_stop = 10;
2064         int retry_on_timeout = 5;
2065         int retry_on_empty = 10;
2066         int err_count = 0;
2067         retval = ftdi_elan_flush_input_fifo(ftdi);
2068         if (retval)
2069                 return retval;
2070         ftdi->bulk_in_left = 0;
2071         ftdi->bulk_in_last = -1;
2072         while (long_stop-- > 0) {
2073                 int read_stop;
2074                 int read_stuck;
2075                 retval = ftdi_elan_synchronize_flush(ftdi);
2076                 if (retval)
2077                         return retval;
2078                 retval = ftdi_elan_flush_input_fifo(ftdi);
2079                 if (retval)
2080                         return retval;
2081               reset:retval = ftdi_elan_synchronize_reset(ftdi);
2082                 if (retval)
2083                         return retval;
2084                 read_stop = 100;
2085                 read_stuck = 10;
2086               read:{
2087                         int packet_bytes = 0;
2088                         retval = usb_bulk_msg(ftdi->udev,
2089                                 usb_rcvbulkpipe(ftdi->udev,
2090                                 ftdi->bulk_in_endpointAddr),
2091                                 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2092                                 &packet_bytes, msecs_to_jiffies(500));
2093                         if (packet_bytes > 2) {
2094                                 char diag[30 *3 + 4];
2095                                 char *d = diag;
2096                                 int m = (sizeof(diag) - 1) / 3;
2097                                 char *b = ftdi->bulk_in_buffer;
2098                                 int bytes_read = 0;
2099                                 unsigned char c = 0;
2100                                 diag[0] = 0;
2101                                 while (packet_bytes-- > 0) {
2102                                         c = *b++;
2103                                         if (bytes_read < m) {
2104                                                 d += sprintf(d, " %02X", c);
2105                                         } else if (bytes_read > m) {
2106                                         } else
2107                                                 d += sprintf(d, " ..");
2108                                         bytes_read += 1;
2109                                         continue;
2110                                 }
2111                                 if (c == 0x7E) {
2112                                         return 0;
2113                                 } else {
2114                                         if (c == 0x55) {
2115                                                 goto read;
2116                                         } else if (read_stop-- > 0) {
2117                                                 goto read;
2118                                         } else {
2119                                                 dev_err(&ftdi->udev->dev, "retr"
2120                                                         "y limit reached\n");
2121                                                 continue;
2122                                         }
2123                                 }
2124                         } else if (packet_bytes > 1) {
2125                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2126                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2127                                 if (s1 == 0x31 && s2 == 0x00) {
2128                                         if (read_stuck-- > 0) {
2129                                                 goto read;
2130                                         } else
2131                                                 goto reset;
2132                                 } else if (s1 == 0x31 && s2 == 0x60) {
2133                                         if (read_stop-- > 0) {
2134                                                 goto read;
2135                                         } else {
2136                                                 dev_err(&ftdi->udev->dev, "retr"
2137                                                         "y limit reached\n");
2138                                                 continue;
2139                                         }
2140                                 } else {
2141                                         if (read_stop-- > 0) {
2142                                                 goto read;
2143                                         } else {
2144                                                 dev_err(&ftdi->udev->dev, "retr"
2145                                                         "y limit reached\n");
2146                                                 continue;
2147                                         }
2148                                 }
2149                         } else if (packet_bytes > 0) {
2150                                 if (read_stop-- > 0) {
2151                                         goto read;
2152                                 } else {
2153                                         dev_err(&ftdi->udev->dev, "retry limit "
2154                                                 "reached\n");
2155                                         continue;
2156                                 }
2157                         } else if (retval == -ETIMEDOUT) {
2158                                 if (retry_on_timeout-- > 0) {
2159                                         goto read;
2160                                 } else {
2161                                         dev_err(&ftdi->udev->dev, "TIMED OUT re"
2162                                                 "try limit reached\n");
2163                                         continue;
2164                                 }
2165                         } else if (retval == 0) {
2166                                 if (retry_on_empty-- > 0) {
2167                                         goto read;
2168                                 } else {
2169                                         dev_err(&ftdi->udev->dev, "empty packet"
2170                                                 " retry limit reached\n");
2171                                         continue;
2172                                 }
2173                         } else {
2174                                 err_count += 1;
2175                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2176                                         retval);
2177                                 if (read_stop-- > 0) {
2178                                         goto read;
2179                                 } else {
2180                                         dev_err(&ftdi->udev->dev, "retry limit "
2181                                                 "reached\n");
2182                                         continue;
2183                                 }
2184                         }
2185                 }
2186         }
2187         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2188         return -EFAULT;
2189 }
2190
2191 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2192 {
2193         int retry_on_empty = 10;
2194         int retry_on_timeout = 5;
2195         int retry_on_status = 50;
2196       more:{
2197                 int packet_bytes = 0;
2198                 int retval = usb_bulk_msg(ftdi->udev,
2199                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2200                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2201                         &packet_bytes, msecs_to_jiffies(1000));
2202                 if (packet_bytes > 2) {
2203                         char diag[30 *3 + 4];
2204                         char *d = diag;
2205                         int m = (sizeof(diag) - 1) / 3;
2206                         char *b = ftdi->bulk_in_buffer;
2207                         int bytes_read = 0;
2208                         diag[0] = 0;
2209                         while (packet_bytes-- > 0) {
2210                                 char c = *b++;
2211                                 if (bytes_read < m) {
2212                                         d += sprintf(d, " %02X",
2213                                                 0x000000FF & c);
2214                                 } else if (bytes_read > m) {
2215                                 } else
2216                                         d += sprintf(d, " ..");
2217                                 bytes_read += 1;
2218                                 continue;
2219                         }
2220                         goto more;
2221                 } else if (packet_bytes > 1) {
2222                         char s1 = ftdi->bulk_in_buffer[0];
2223                         char s2 = ftdi->bulk_in_buffer[1];
2224                         if (s1 == 0x31 && s2 == 0x60) {
2225                                 return 0;
2226                         } else if (retry_on_status-- > 0) {
2227                                 msleep(5);
2228                                 goto more;
2229                         } else
2230                                 return -EFAULT;
2231                 } else if (packet_bytes > 0) {
2232                         char b1 = ftdi->bulk_in_buffer[0];
2233                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
2234                                 "TDI = %02X\n", b1);
2235                         if (retry_on_status-- > 0) {
2236                                 msleep(5);
2237                                 goto more;
2238                         } else {
2239                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
2240                                         "imit reached\n");
2241                                 return -EFAULT;
2242                         }
2243                 } else if (retval == -ETIMEDOUT) {
2244                         if (retry_on_timeout-- > 0) {
2245                                 goto more;
2246                         } else {
2247                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
2248                                         "t reached\n");
2249                                 return -ENOMEM;
2250                         }
2251                 } else if (retval == 0) {
2252                         if (retry_on_empty-- > 0) {
2253                                 goto more;
2254                         } else {
2255                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
2256                                         "imit reached\n");
2257                                 return -ENOMEM;
2258                         }
2259                 } else {
2260                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2261                         return -ENOMEM;
2262                 }
2263         }
2264         return -1;
2265 }
2266
2267 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2268 {
2269         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2270         if (UxxxStatus)
2271                 return UxxxStatus;
2272         if (ftdi->controlreg & 0x00400000) {
2273                 if (ftdi->card_ejected) {
2274                 } else {
2275                         ftdi->card_ejected = 1;
2276                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = "
2277                                 "%08X\n", ftdi->controlreg);
2278                 }
2279                 return -ENODEV;
2280         } else {
2281                 u8 fn = ftdi->function - 1;
2282                 int activePCIfn = fn << 8;
2283                 u32 pcidata;
2284                 u32 pciVID;
2285                 u32 pciPID;
2286                 int reg = 0;
2287                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2288                         &pcidata);
2289                 if (UxxxStatus)
2290                         return UxxxStatus;
2291                 pciVID = pcidata & 0xFFFF;
2292                 pciPID = (pcidata >> 16) & 0xFFFF;
2293                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2294                         ftdi->platform_data.device) {
2295                         return 0;
2296                 } else {
2297                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X devi"
2298                                 "ce=%04X pciPID=%04X\n",
2299                                 ftdi->platform_data.vendor, pciVID,
2300                                 ftdi->platform_data.device, pciPID);
2301                         return -ENODEV;
2302                 }
2303         }
2304 }
2305
2306
2307 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2308         offsetof(struct ohci_regs, member), 0, data);
2309 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2310         offsetof(struct ohci_regs, member), 0, data);
2311
2312 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2313 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2314         OHCI_INTR_WDH)
2315 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2316 {
2317         int devices = 0;
2318         int retval;
2319         u32 hc_control;
2320         int num_ports;
2321         u32 control;
2322         u32 rh_a = -1;
2323         u32 status;
2324         u32 fminterval;
2325         u32 hc_fminterval;
2326         u32 periodicstart;
2327         u32 cmdstatus;
2328         u32 roothub_a;
2329         int mask = OHCI_INTR_INIT;
2330         int sleep_time = 0;
2331         int reset_timeout = 30;        /* ... allow extra time */
2332         int temp;
2333         retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2334         if (retval)
2335                 return retval;
2336         retval = ftdi_read_pcimem(ftdi, control, &control);
2337         if (retval)
2338                 return retval;
2339         retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2340         if (retval)
2341                 return retval;
2342         num_ports = rh_a & RH_A_NDP;
2343         retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2344         if (retval)
2345                 return retval;
2346         hc_fminterval &= 0x3fff;
2347         if (hc_fminterval != FI) {
2348         }
2349         hc_fminterval |= FSMP(hc_fminterval) << 16;
2350         retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2351         if (retval)
2352                 return retval;
2353         switch (hc_control & OHCI_CTRL_HCFS) {
2354         case OHCI_USB_OPER:
2355                 sleep_time = 0;
2356                 break;
2357         case OHCI_USB_SUSPEND:
2358         case OHCI_USB_RESUME:
2359                 hc_control &= OHCI_CTRL_RWC;
2360                 hc_control |= OHCI_USB_RESUME;
2361                 sleep_time = 10;
2362                 break;
2363         default:
2364                 hc_control &= OHCI_CTRL_RWC;
2365                 hc_control |= OHCI_USB_RESET;
2366                 sleep_time = 50;
2367                 break;
2368         }
2369         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2370         if (retval)
2371                 return retval;
2372         retval = ftdi_read_pcimem(ftdi, control, &control);
2373         if (retval)
2374                 return retval;
2375         msleep(sleep_time);
2376         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2377         if (retval)
2378                 return retval;
2379         if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2380                 for (temp = 0; temp < num_ports; temp++) {
2381                         retval = ftdi_write_pcimem(ftdi,
2382                                 roothub.portstatus[temp], RH_PS_LSDA);
2383                         if (retval)
2384                                 return retval;
2385                 }
2386         }
2387         retval = ftdi_read_pcimem(ftdi, control, &control);
2388         if (retval)
2389                 return retval;
2390       retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2391         if (retval)
2392                 return retval;
2393         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2394         if (retval)
2395                 return retval;
2396       extra:{
2397                 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2398                 if (retval)
2399                         return retval;
2400                 if (0 != (status & OHCI_HCR)) {
2401                         if (--reset_timeout == 0) {
2402                                 dev_err(&ftdi->udev->dev, "USB HC reset timed o"
2403                                         "ut!\n");
2404                                 return -ENODEV;
2405                         } else {
2406                                 msleep(5);
2407                                 goto extra;
2408                         }
2409                 }
2410         }
2411         if (quirk & OHCI_QUIRK_INITRESET) {
2412                 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2413                 if (retval)
2414                         return retval;
2415                 retval = ftdi_read_pcimem(ftdi, control, &control);
2416                 if (retval)
2417                         return retval;
2418         }
2419         retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2420         if (retval)
2421                 return retval;
2422         retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2423         if (retval)
2424                 return retval;
2425         retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2426         if (retval)
2427                 return retval;
2428         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2429         if (retval)
2430                 return retval;
2431         retval = ftdi_write_pcimem(ftdi, fminterval,
2432                 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2433         if (retval)
2434                 return retval;
2435         retval = ftdi_write_pcimem(ftdi, periodicstart,
2436                 ((9 *hc_fminterval) / 10) & 0x3fff);
2437         if (retval)
2438                 return retval;
2439         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2440         if (retval)
2441                 return retval;
2442         retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2443         if (retval)
2444                 return retval;
2445         if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2446                 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2447                         quirk |= OHCI_QUIRK_INITRESET;
2448                         goto retry;
2449                 } else
2450                         dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2451                                 fminterval, periodicstart);
2452         }                        /* start controller operations */
2453         hc_control &= OHCI_CTRL_RWC;
2454         hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2455         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2456         if (retval)
2457                 return retval;
2458         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2459         if (retval)
2460                 return retval;
2461         retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2462         if (retval)
2463                 return retval;
2464         retval = ftdi_read_pcimem(ftdi, control, &control);
2465         if (retval)
2466                 return retval;
2467         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2468         if (retval)
2469                 return retval;
2470         retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2471         if (retval)
2472                 return retval;
2473         retval = ftdi_write_pcimem(ftdi, intrdisable,
2474                 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2475                 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2476                 OHCI_INTR_SO);
2477         if (retval)
2478                 return retval;        /* handle root hub init quirks ... */
2479         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2480         if (retval)
2481                 return retval;
2482         roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2483         if (quirk & OHCI_QUIRK_SUPERIO) {
2484                 roothub_a |= RH_A_NOCP;
2485                 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2486                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2487                 if (retval)
2488                         return retval;
2489         } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2490                 roothub_a |= RH_A_NPS;
2491                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2492                 if (retval)
2493                         return retval;
2494         }
2495         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2496         if (retval)
2497                 return retval;
2498         retval = ftdi_write_pcimem(ftdi, roothub.b,
2499                 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2500         if (retval)
2501                 return retval;
2502         retval = ftdi_read_pcimem(ftdi, control, &control);
2503         if (retval)
2504                 return retval;
2505         mdelay((roothub_a >> 23) & 0x1fe);
2506         for (temp = 0; temp < num_ports; temp++) {
2507                 u32 portstatus;
2508                 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2509                         &portstatus);
2510                 if (retval)
2511                         return retval;
2512                 if (1 & portstatus)
2513                         devices += 1;
2514         }
2515         return devices;
2516 }
2517
2518 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2519 {
2520         u32 latence_timer;
2521         int UxxxStatus;
2522         u32 pcidata;
2523         int reg = 0;
2524         int activePCIfn = fn << 8;
2525         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2526         if (UxxxStatus)
2527                 return UxxxStatus;
2528         reg = 16;
2529         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2530                 0xFFFFFFFF);
2531         if (UxxxStatus)
2532                 return UxxxStatus;
2533         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2534                 &pcidata);
2535         if (UxxxStatus)
2536                 return UxxxStatus;
2537         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2538                 0xF0000000);
2539         if (UxxxStatus)
2540                 return UxxxStatus;
2541         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2542                 &pcidata);
2543         if (UxxxStatus)
2544                 return UxxxStatus;
2545         reg = 12;
2546         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2547                 &latence_timer);
2548         if (UxxxStatus)
2549                 return UxxxStatus;
2550         latence_timer &= 0xFFFF00FF;
2551         latence_timer |= 0x00001600;
2552         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2553                 latence_timer);
2554         if (UxxxStatus)
2555                 return UxxxStatus;
2556         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2557                 &pcidata);
2558         if (UxxxStatus)
2559                 return UxxxStatus;
2560         reg = 4;
2561         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2562                 0x06);
2563         if (UxxxStatus)
2564                 return UxxxStatus;
2565         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2566                 &pcidata);
2567         if (UxxxStatus)
2568                 return UxxxStatus;
2569         for (reg = 0; reg <= 0x54; reg += 4) {
2570                 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2571                 if (UxxxStatus)
2572                         return UxxxStatus;
2573         }
2574         return 0;
2575 }
2576
2577 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2578 {
2579         u32 latence_timer;
2580         int UxxxStatus;
2581         u32 pcidata;
2582         int reg = 0;
2583         int activePCIfn = fn << 8;
2584         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2585         if (UxxxStatus)
2586                 return UxxxStatus;
2587         reg = 16;
2588         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2589                 0xFFFFFFFF);
2590         if (UxxxStatus)
2591                 return UxxxStatus;
2592         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2593                 &pcidata);
2594         if (UxxxStatus)
2595                 return UxxxStatus;
2596         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2597                 0x00000000);
2598         if (UxxxStatus)
2599                 return UxxxStatus;
2600         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2601                 &pcidata);
2602         if (UxxxStatus)
2603                 return UxxxStatus;
2604         reg = 12;
2605         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2606                 &latence_timer);
2607         if (UxxxStatus)
2608                 return UxxxStatus;
2609         latence_timer &= 0xFFFF00FF;
2610         latence_timer |= 0x00001600;
2611         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2612                 latence_timer);
2613         if (UxxxStatus)
2614                 return UxxxStatus;
2615         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2616                 &pcidata);
2617         if (UxxxStatus)
2618                 return UxxxStatus;
2619         reg = 4;
2620         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2621                 0x00);
2622         if (UxxxStatus)
2623                 return UxxxStatus;
2624         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2625                 &pcidata);
2626         if (UxxxStatus)
2627                 return UxxxStatus;
2628         return 0;
2629 }
2630
2631 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2632 {
2633         int result;
2634         int UxxxStatus;
2635         UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2636         if (UxxxStatus)
2637                 return UxxxStatus;
2638         result = ftdi_elan_check_controller(ftdi, quirk);
2639         UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2640         if (UxxxStatus)
2641                 return UxxxStatus;
2642         return result;
2643 }
2644
2645 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2646 {
2647         u32 controlreg;
2648         u8 sensebits;
2649         int UxxxStatus;
2650         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2651         if (UxxxStatus)
2652                 return UxxxStatus;
2653         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2654         if (UxxxStatus)
2655                 return UxxxStatus;
2656         msleep(750);
2657         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2658         if (UxxxStatus)
2659                 return UxxxStatus;
2660         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2661         if (UxxxStatus)
2662                 return UxxxStatus;
2663         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2664         if (UxxxStatus)
2665                 return UxxxStatus;
2666         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2667         if (UxxxStatus)
2668                 return UxxxStatus;
2669         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2670         if (UxxxStatus)
2671                 return UxxxStatus;
2672         msleep(250);
2673         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2674         if (UxxxStatus)
2675                 return UxxxStatus;
2676         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2677         if (UxxxStatus)
2678                 return UxxxStatus;
2679         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2680         if (UxxxStatus)
2681                 return UxxxStatus;
2682         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2683         if (UxxxStatus)
2684                 return UxxxStatus;
2685         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2686         if (UxxxStatus)
2687                 return UxxxStatus;
2688         msleep(1000);
2689         sensebits = (controlreg >> 16) & 0x000F;
2690         if (0x0D == sensebits)
2691                 return 0;
2692         else
2693                 return - ENXIO;
2694 }
2695
2696 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2697 {
2698         int UxxxStatus;
2699         u32 pcidata;
2700         int reg = 0;
2701         u8 fn;
2702         int activePCIfn = 0;
2703         int max_devices = 0;
2704         int controllers = 0;
2705         int unrecognized = 0;
2706         ftdi->function = 0;
2707         for (fn = 0; (fn < 4); fn++) {
2708                 u32 pciVID = 0;
2709                 u32 pciPID = 0;
2710                 int devices = 0;
2711                 activePCIfn = fn << 8;
2712                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2713                         &pcidata);
2714                 if (UxxxStatus)
2715                         return UxxxStatus;
2716                 pciVID = pcidata & 0xFFFF;
2717                 pciPID = (pcidata >> 16) & 0xFFFF;
2718                 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2719                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2720                         controllers += 1;
2721                 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2722                         {
2723                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2724                         controllers += 1;
2725                 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2726                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2727                         controllers += 1;
2728                 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2729                         {
2730                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2731                         controllers += 1;
2732                 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2733                         devices = ftdi_elan_found_controller(ftdi, fn,
2734                                 OHCI_QUIRK_AMD756);
2735                         controllers += 1;
2736                 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2737                         devices = ftdi_elan_found_controller(ftdi, fn,
2738                                 OHCI_QUIRK_ZFMICRO);
2739                         controllers += 1;
2740                 } else if (0 == pcidata) {
2741                 } else
2742                         unrecognized += 1;
2743                 if (devices > max_devices) {
2744                         max_devices = devices;
2745                         ftdi->function = fn + 1;
2746                         ftdi->platform_data.vendor = pciVID;
2747                         ftdi->platform_data.device = pciPID;
2748                 }
2749         }
2750         if (ftdi->function > 0) {
2751                 UxxxStatus = ftdi_elan_setup_controller(ftdi,
2752                         ftdi->function - 1);
2753                 if (UxxxStatus)
2754                         return UxxxStatus;
2755                 return 0;
2756         } else if (controllers > 0) {
2757                 return -ENXIO;
2758         } else if (unrecognized > 0) {
2759                 return -ENXIO;
2760         } else {
2761                 ftdi->enumerated = 0;
2762                 return -ENXIO;
2763         }
2764 }
2765
2766
2767 /*
2768 * we use only the first bulk-in and bulk-out endpoints
2769 */
2770 static int ftdi_elan_probe(struct usb_interface *interface,
2771         const struct usb_device_id *id)
2772 {
2773         struct usb_host_interface *iface_desc;
2774         struct usb_endpoint_descriptor *endpoint;
2775         size_t buffer_size;
2776         int i;
2777         int retval = -ENOMEM;
2778         struct usb_ftdi *ftdi = kmalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2779         if (ftdi == NULL) {
2780                 printk(KERN_ERR "Out of memory\n");
2781                 return -ENOMEM;
2782         }
2783         memset(ftdi, 0x00, sizeof(struct usb_ftdi));
2784         mutex_lock(&ftdi_module_lock);
2785         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2786         ftdi->sequence_num = ++ftdi_instances;
2787         mutex_unlock(&ftdi_module_lock);
2788         ftdi_elan_init_kref(ftdi);
2789         init_MUTEX(&ftdi->sw_lock);
2790         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2791         ftdi->interface = interface;
2792         init_MUTEX(&ftdi->u132_lock);
2793         ftdi->expected = 4;
2794         iface_desc = interface->cur_altsetting;
2795         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2796                 endpoint = &iface_desc->endpoint[i].desc;
2797                 if (!ftdi->bulk_in_endpointAddr &&
2798                     usb_endpoint_is_bulk_in(endpoint)) {
2799                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2800                         ftdi->bulk_in_size = buffer_size;
2801                         ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2802                         ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2803                         if (!ftdi->bulk_in_buffer) {
2804                                 dev_err(&ftdi->udev->dev, "Could not allocate b"
2805                                         "ulk_in_buffer\n");
2806                                 retval = -ENOMEM;
2807                                 goto error;
2808                         }
2809                 }
2810                 if (!ftdi->bulk_out_endpointAddr &&
2811                     usb_endpoint_is_bulk_out(endpoint)) {
2812                         ftdi->bulk_out_endpointAddr =
2813                                 endpoint->bEndpointAddress;
2814                 }
2815         }
2816         if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2817                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk"
2818                         "-out endpoints\n");
2819                 retval = -ENODEV;
2820                 goto error;
2821         }
2822         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2823                 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2824                 ftdi->bulk_out_endpointAddr);
2825         usb_set_intfdata(interface, ftdi);
2826         if (iface_desc->desc.bInterfaceNumber == 0 &&
2827                 ftdi->bulk_in_endpointAddr == 0x81 &&
2828                 ftdi->bulk_out_endpointAddr == 0x02) {
2829                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2830                 if (retval) {
2831                         dev_err(&ftdi->udev->dev, "Not able to get a minor for "
2832                                 "this device.\n");
2833                         usb_set_intfdata(interface, NULL);
2834                         retval = -ENOMEM;
2835                         goto error;
2836                 } else {
2837                         ftdi->class = &ftdi_elan_jtag_class;
2838                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface "
2839                                 "%d now attached to ftdi%d\n", ftdi,
2840                                 iface_desc->desc.bInterfaceNumber,
2841                                 interface->minor);
2842                         return 0;
2843                 }
2844         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2845                 ftdi->bulk_in_endpointAddr == 0x83 &&
2846                 ftdi->bulk_out_endpointAddr == 0x04) {
2847                 ftdi->class = NULL;
2848                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now a"
2849                         "ctivated\n", ftdi, iface_desc->desc.bInterfaceNumber);
2850                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2851                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2852                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2853                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2854                 return 0;
2855         } else {
2856                 dev_err(&ftdi->udev->dev,
2857                         "Could not find ELAN's U132 device\n");
2858                 retval = -ENODEV;
2859                 goto error;
2860         }
2861       error:if (ftdi) {
2862                 ftdi_elan_put_kref(ftdi);
2863         }
2864         return retval;
2865 }
2866
2867 static void ftdi_elan_disconnect(struct usb_interface *interface)
2868 {
2869         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2870         ftdi->disconnected += 1;
2871         if (ftdi->class) {
2872                 int minor = interface->minor;
2873                 struct usb_class_driver *class = ftdi->class;
2874                 usb_set_intfdata(interface, NULL);
2875                 usb_deregister_dev(interface, class);
2876                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on min"
2877                         "or %d now disconnected\n", minor);
2878         } else {
2879                 ftdi_status_cancel_work(ftdi);
2880                 ftdi_command_cancel_work(ftdi);
2881                 ftdi_response_cancel_work(ftdi);
2882                 ftdi_elan_abandon_completions(ftdi);
2883                 ftdi_elan_abandon_targets(ftdi);
2884                 if (ftdi->registered) {
2885                         platform_device_unregister(&ftdi->platform_dev);
2886                         ftdi->synchronized = 0;
2887                         ftdi->enumerated = 0;
2888                         ftdi->initialized = 0;
2889                         ftdi->registered = 0;
2890                 }
2891                 flush_workqueue(status_queue);
2892                 flush_workqueue(command_queue);
2893                 flush_workqueue(respond_queue);
2894                 ftdi->disconnected += 1;
2895                 usb_set_intfdata(interface, NULL);
2896                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller inter"
2897                         "face now disconnected\n");
2898         }
2899         ftdi_elan_put_kref(ftdi);
2900 }
2901
2902 static struct usb_driver ftdi_elan_driver = {
2903         .name = "ftdi-elan",
2904         .probe = ftdi_elan_probe,
2905         .disconnect = ftdi_elan_disconnect,
2906         .id_table = ftdi_elan_table,
2907 };
2908 static int __init ftdi_elan_init(void)
2909 {
2910         int result;
2911         printk(KERN_INFO "driver %s built at %s on %s\n", ftdi_elan_driver.name,
2912                __TIME__, __DATE__);
2913         mutex_init(&ftdi_module_lock);
2914         INIT_LIST_HEAD(&ftdi_static_list);
2915         status_queue = create_singlethread_workqueue("ftdi-status-control");
2916         if (!status_queue)
2917                 goto err_status_queue;
2918         command_queue = create_singlethread_workqueue("ftdi-command-engine");
2919         if (!command_queue)
2920                 goto err_command_queue;
2921         respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2922         if (!respond_queue)
2923                 goto err_respond_queue;
2924         result = usb_register(&ftdi_elan_driver);
2925         if (result) {
2926                 destroy_workqueue(status_queue);
2927                 destroy_workqueue(command_queue);
2928                 destroy_workqueue(respond_queue);
2929                 printk(KERN_ERR "usb_register failed. Error number %d\n",
2930                        result);
2931         }
2932         return result;
2933
2934  err_respond_queue:
2935         destroy_workqueue(command_queue);
2936  err_command_queue:
2937         destroy_workqueue(status_queue);
2938  err_status_queue:
2939         printk(KERN_ERR "%s couldn't create workqueue\n", ftdi_elan_driver.name);
2940         return -ENOMEM;
2941 }
2942
2943 static void __exit ftdi_elan_exit(void)
2944 {
2945         struct usb_ftdi *ftdi;
2946         struct usb_ftdi *temp;
2947         usb_deregister(&ftdi_elan_driver);
2948         printk(KERN_INFO "ftdi_u132 driver deregistered\n");
2949         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2950                 ftdi_status_cancel_work(ftdi);
2951                 ftdi_command_cancel_work(ftdi);
2952                 ftdi_response_cancel_work(ftdi);
2953         } flush_workqueue(status_queue);
2954         destroy_workqueue(status_queue);
2955         status_queue = NULL;
2956         flush_workqueue(command_queue);
2957         destroy_workqueue(command_queue);
2958         command_queue = NULL;
2959         flush_workqueue(respond_queue);
2960         destroy_workqueue(respond_queue);
2961         respond_queue = NULL;
2962 }
2963
2964
2965 module_init(ftdi_elan_init);
2966 module_exit(ftdi_elan_exit);