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/slab.h>
  44 #include <linux/module.h>
  45 #include <linux/kref.h>
  46 #include <asm/uaccess.h>
  47 #include <linux/usb.h>
  48 #include <linux/workqueue.h>
  49 #include <linux/platform_device.h>
  50 MODULE_AUTHOR("Tony Olech");
  51 MODULE_DESCRIPTION("FTDI ELAN driver");
  52 MODULE_LICENSE("GPL");
  53 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
  54 extern struct platform_driver u132_platform_driver;
  55 static struct workqueue_struct *status_queue;
  56 static struct workqueue_struct *command_queue;
  57 static struct workqueue_struct *respond_queue;
  58 /*
  59 * ftdi_module_lock exists to protect access to global variables
  60 *
  61 */
  62 static struct semaphore ftdi_module_lock;
  63 static int ftdi_instances = 0;
  64 static struct list_head ftdi_static_list;
  65 /*
  66 * end of the global variables protected by ftdi_module_lock
  67 */
  68 #include "usb_u132.h"
  69 #define TD_DEVNOTRESP 5
  70 /* Define these values to match your devices*/
  71 #define USB_FTDI_ELAN_VENDOR_ID 0x0403
  72 #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
  73 /* table of devices that work with this driver*/
  74 static struct usb_device_id ftdi_elan_table[] = {
  75         {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
  76         { /* Terminating entry */ }
  77 };
  78
  79 MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
  80 /* only the jtag(firmware upgrade device) interface requires
  81 * a device file and corresponding minor number, but the
  82 * interface is created unconditionally - I suppose it could
  83 * be configured or not according to a module parameter.
  84 * But since we(now) require one interface per device,
  85 * and since it unlikely that a normal installation would
  86 * require more than a couple of elan-ftdi devices, 8 seems
  87 * like a reasonable limit to have here, and if someone
  88 * really requires more than 8 devices, then they can frig the
  89 * code and recompile
  90 */
  91 #define USB_FTDI_ELAN_MINOR_BASE 192
  92 #define COMMAND_BITS 5
  93 #define COMMAND_SIZE (1<<COMMAND_BITS)
  94 #define COMMAND_MASK (COMMAND_SIZE-1)
  95 struct u132_command {
  96         u8 header;
  97         u16 length;
  98         u8 address;
  99         u8 width;
 100         u32 value;
 101         int follows;
 102         void *buffer;
 103 };
 104 #define RESPOND_BITS 5
 105 #define RESPOND_SIZE (1<<RESPOND_BITS)
 106 #define RESPOND_MASK (RESPOND_SIZE-1)
 107 struct u132_respond {
 108         u8 header;
 109         u8 address;
 110         u32 *value;
 111         int *result;
 112         struct completion wait_completion;
 113 };
 114 struct u132_target {
 115         void *endp;
 116         struct urb *urb;
 117         int toggle_bits;
 118         int error_count;
 119         int condition_code;
 120         int repeat_number;
 121         int halted;
 122         int skipped;
 123         int actual;
 124         int non_null;
 125         int active;
 126         int abandoning;
 127         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
 128                 int toggle_bits, int error_count, int condition_code,
 129                 int repeat_number, int halted, int skipped, int actual,
 130                 int non_null);
 131 };
 132 /* Structure to hold all of our device specific stuff*/
 133 struct usb_ftdi {
 134         struct list_head ftdi_list;
 135         struct semaphore u132_lock;
 136         int command_next;
 137         int command_head;
 138         struct u132_command command[COMMAND_SIZE];
 139         int respond_next;
 140         int respond_head;
 141         struct u132_respond respond[RESPOND_SIZE];
 142         struct u132_target target[4];
 143         char device_name[16];
 144         unsigned synchronized:1;
 145         unsigned enumerated:1;
 146         unsigned registered:1;
 147         unsigned initialized:1;
 148         unsigned card_ejected:1;
 149         int function;
 150         int sequence_num;
 151         int disconnected;
 152         int gone_away;
 153         int stuck_status;
 154         int status_queue_delay;
 155         struct semaphore sw_lock;
 156         struct usb_device *udev;
 157         struct usb_interface *interface;
 158         struct usb_class_driver *class;
 159         struct delayed_work status_work;
 160         struct delayed_work command_work;
 161         struct delayed_work respond_work;
 162         struct u132_platform_data platform_data;
 163         struct resource resources[0];
 164         struct platform_device platform_dev;
 165         unsigned char *bulk_in_buffer;
 166         size_t bulk_in_size;
 167         size_t bulk_in_last;
 168         size_t bulk_in_left;
 169         __u8 bulk_in_endpointAddr;
 170         __u8 bulk_out_endpointAddr;
 171         struct kref kref;
 172         u32 controlreg;
 173         u8 response[4 + 1024];
 174         int expected;
 175         int recieved;
 176         int ed_found;
 177 };
 178 #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
 179 #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
 180         platform_dev)
 181 static struct usb_driver ftdi_elan_driver;
 182 static void ftdi_elan_delete(struct kref *kref)
 183 {
 184         struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
 185         dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
 186         usb_put_dev(ftdi->udev);
 187         ftdi->disconnected += 1;
 188         down(&ftdi_module_lock);
 189         list_del_init(&ftdi->ftdi_list);
 190         ftdi_instances -= 1;
 191         up(&ftdi_module_lock);
 192         kfree(ftdi->bulk_in_buffer);
 193         ftdi->bulk_in_buffer = NULL;
 194 }
 195
 196 static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
 197 {
 198         kref_put(&ftdi->kref, ftdi_elan_delete);
 199 }
 200
 201 static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
 202 {
 203         kref_get(&ftdi->kref);
 204 }
 205
 206 static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
 207 {
 208         kref_init(&ftdi->kref);
 209 }
 210
 211 static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 212 {
 213         if (!queue_delayed_work(status_queue, &ftdi->status_work, delta))
 214                 kref_put(&ftdi->kref, ftdi_elan_delete);
 215 }
 216
 217 static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 218 {
 219         if (queue_delayed_work(status_queue, &ftdi->status_work, delta))
 220                 kref_get(&ftdi->kref);
 221 }
 222
 223 static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
 224 {
 225         if (cancel_delayed_work(&ftdi->status_work))
 226                 kref_put(&ftdi->kref, ftdi_elan_delete);
 227 }
 228
 229 static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 230 {
 231         if (!queue_delayed_work(command_queue, &ftdi->command_work, delta))
 232                 kref_put(&ftdi->kref, ftdi_elan_delete);
 233 }
 234
 235 static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 236 {
 237         if (queue_delayed_work(command_queue, &ftdi->command_work, delta))
 238                 kref_get(&ftdi->kref);
 239 }
 240
 241 static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
 242 {
 243         if (cancel_delayed_work(&ftdi->command_work))
 244                 kref_put(&ftdi->kref, ftdi_elan_delete);
 245 }
 246
 247 static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
 248         unsigned int delta)
 249 {
 250         if (!queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
 251                 kref_put(&ftdi->kref, ftdi_elan_delete);
 252 }
 253
 254 static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 255 {
 256         if (queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
 257                 kref_get(&ftdi->kref);
 258 }
 259
 260 static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
 261 {
 262         if (cancel_delayed_work(&ftdi->respond_work))
 263                 kref_put(&ftdi->kref, ftdi_elan_delete);
 264 }
 265
 266 void ftdi_elan_gone_away(struct platform_device *pdev)
 267 {
 268         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
 269         ftdi->gone_away += 1;
 270         ftdi_elan_put_kref(ftdi);
 271 }
 272
 273
 274 EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
 275 static void ftdi_release_platform_dev(struct device *dev)
 276 {
 277         dev->parent = NULL;
 278 }
 279
 280 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 281         struct u132_target *target, u8 *buffer, int length);
 282 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
 283 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
 284 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
 285 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
 286 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
 287 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
 288 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
 289 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
 290 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
 291 static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
 292 {
 293         int result;
 294         if (ftdi->platform_dev.dev.parent)
 295                 return -EBUSY;
 296         ftdi_elan_get_kref(ftdi);
 297         ftdi->platform_data.potpg = 100;
 298         ftdi->platform_data.reset = NULL;
 299         ftdi->platform_dev.id = ftdi->sequence_num;
 300         ftdi->platform_dev.resource = ftdi->resources;
 301         ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
 302         ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
 303         ftdi->platform_dev.dev.parent = NULL;
 304         ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
 305         ftdi->platform_dev.dev.dma_mask = NULL;
 306         snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
 307         ftdi->platform_dev.name = ftdi->device_name;
 308         dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
 309         request_module("u132_hcd");
 310         dev_info(&ftdi->udev->dev, "registering '%s'\n",
 311                 ftdi->platform_dev.name);
 312         result = platform_device_register(&ftdi->platform_dev);
 313         return result;
 314 }
 315
 316 static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
 317 {
 318         down(&ftdi->u132_lock);
 319         while (ftdi->respond_next > ftdi->respond_head) {
 320                 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
 321                         ftdi->respond_head++];
 322                 *respond->result = -ESHUTDOWN;
 323                 *respond->value = 0;
 324                 complete(&respond->wait_completion);
 325         } up(&ftdi->u132_lock);
 326 }
 327
 328 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
 329 {
 330         int ed_number = 4;
 331         down(&ftdi->u132_lock);
 332         while (ed_number-- > 0) {
 333                 struct u132_target *target = &ftdi->target[ed_number];
 334                 if (target->active == 1) {
 335                         target->condition_code = TD_DEVNOTRESP;
 336                         up(&ftdi->u132_lock);
 337                         ftdi_elan_do_callback(ftdi, target, NULL, 0);
 338                         down(&ftdi->u132_lock);
 339                 }
 340         }
 341         ftdi->recieved = 0;
 342         ftdi->expected = 4;
 343         ftdi->ed_found = 0;
 344         up(&ftdi->u132_lock);
 345 }
 346
 347 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
 348 {
 349         int ed_number = 4;
 350         down(&ftdi->u132_lock);
 351         while (ed_number-- > 0) {
 352                 struct u132_target *target = &ftdi->target[ed_number];
 353                 target->abandoning = 1;
 354               wait_1:if (target->active == 1) {
 355                         int command_size = ftdi->command_next -
 356                                 ftdi->command_head;
 357                         if (command_size < COMMAND_SIZE) {
 358                                 struct u132_command *command = &ftdi->command[
 359                                         COMMAND_MASK & ftdi->command_next];
 360                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 361                                 command->length = 0x00;
 362                                 command->address = 0x00;
 363                                 command->width = 0x00;
 364                                 command->follows = 0;
 365                                 command->value = 0;
 366                                 command->buffer = &command->value;
 367                                 ftdi->command_next += 1;
 368                                 ftdi_elan_kick_command_queue(ftdi);
 369                         } else {
 370                                 up(&ftdi->u132_lock);
 371                                 msleep(100);
 372                                 down(&ftdi->u132_lock);
 373                                 goto wait_1;
 374                         }
 375                 }
 376               wait_2:if (target->active == 1) {
 377                         int command_size = ftdi->command_next -
 378                                 ftdi->command_head;
 379                         if (command_size < COMMAND_SIZE) {
 380                                 struct u132_command *command = &ftdi->command[
 381                                         COMMAND_MASK & ftdi->command_next];
 382                                 command->header = 0x90 | (ed_number << 5);
 383                                 command->length = 0x00;
 384                                 command->address = 0x00;
 385                                 command->width = 0x00;
 386                                 command->follows = 0;
 387                                 command->value = 0;
 388                                 command->buffer = &command->value;
 389                                 ftdi->command_next += 1;
 390                                 ftdi_elan_kick_command_queue(ftdi);
 391                         } else {
 392                                 up(&ftdi->u132_lock);
 393                                 msleep(100);
 394                                 down(&ftdi->u132_lock);
 395                                 goto wait_2;
 396                         }
 397                 }
 398         }
 399         ftdi->recieved = 0;
 400         ftdi->expected = 4;
 401         ftdi->ed_found = 0;
 402         up(&ftdi->u132_lock);
 403 }
 404
 405 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
 406 {
 407         int ed_number = 4;
 408         down(&ftdi->u132_lock);
 409         while (ed_number-- > 0) {
 410                 struct u132_target *target = &ftdi->target[ed_number];
 411                 target->abandoning = 1;
 412               wait:if (target->active == 1) {
 413                         int command_size = ftdi->command_next -
 414                                 ftdi->command_head;
 415                         if (command_size < COMMAND_SIZE) {
 416                                 struct u132_command *command = &ftdi->command[
 417                                         COMMAND_MASK & ftdi->command_next];
 418                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 419                                 command->length = 0x00;
 420                                 command->address = 0x00;
 421                                 command->width = 0x00;
 422                                 command->follows = 0;
 423                                 command->value = 0;
 424                                 command->buffer = &command->value;
 425                                 ftdi->command_next += 1;
 426                                 ftdi_elan_kick_command_queue(ftdi);
 427                         } else {
 428                                 up(&ftdi->u132_lock);
 429                                 msleep(100);
 430                                 down(&ftdi->u132_lock);
 431                                 goto wait;
 432                         }
 433                 }
 434         }
 435         ftdi->recieved = 0;
 436         ftdi->expected = 4;
 437         ftdi->ed_found = 0;
 438         up(&ftdi->u132_lock);
 439 }
 440
 441 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
 442 {
 443         ftdi_command_queue_work(ftdi, 0);
 444         return;
 445 }
 446
 447 static void ftdi_elan_command_work(struct work_struct *work)
 448 {
 449         struct usb_ftdi *ftdi =
 450                 container_of(work, struct usb_ftdi, command_work.work);
 451
 452         if (ftdi->disconnected > 0) {
 453                 ftdi_elan_put_kref(ftdi);
 454                 return;
 455         } else {
 456                 int retval = ftdi_elan_command_engine(ftdi);
 457                 if (retval == -ESHUTDOWN) {
 458                         ftdi->disconnected += 1;
 459                 } else if (retval == -ENODEV) {
 460                         ftdi->disconnected += 1;
 461                 } else if (retval)
 462                         dev_err(&ftdi->udev->dev, "command error %d\n", retval);
 463                 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
 464                 return;
 465         }
 466 }
 467
 468 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
 469 {
 470         ftdi_respond_queue_work(ftdi, 0);
 471         return;
 472 }
 473
 474 static void ftdi_elan_respond_work(struct work_struct *work)
 475 {
 476         struct usb_ftdi *ftdi =
 477                 container_of(work, struct usb_ftdi, respond_work.work);
 478         if (ftdi->disconnected > 0) {
 479                 ftdi_elan_put_kref(ftdi);
 480                 return;
 481         } else {
 482                 int retval = ftdi_elan_respond_engine(ftdi);
 483                 if (retval == 0) {
 484                 } else if (retval == -ESHUTDOWN) {
 485                         ftdi->disconnected += 1;
 486                 } else if (retval == -ENODEV) {
 487                         ftdi->disconnected += 1;
 488                 } else if (retval == -EILSEQ) {
 489                         ftdi->disconnected += 1;
 490                 } else {
 491                         ftdi->disconnected += 1;
 492                         dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
 493                 }
 494                 if (ftdi->disconnected > 0) {
 495                         ftdi_elan_abandon_completions(ftdi);
 496                         ftdi_elan_abandon_targets(ftdi);
 497                 }
 498                 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
 499                 return;
 500         }
 501 }
 502
 503
 504 /*
 505 * the sw_lock is initially held and will be freed
 506 * after the FTDI has been synchronized
 507 *
 508 */
 509 static void ftdi_elan_status_work(struct work_struct *work)
 510 {
 511         struct usb_ftdi *ftdi =
 512                 container_of(work, struct usb_ftdi, status_work.work);
 513         int work_delay_in_msec = 0;
 514         if (ftdi->disconnected > 0) {
 515                 ftdi_elan_put_kref(ftdi);
 516                 return;
 517         } else if (ftdi->synchronized == 0) {
 518                 down(&ftdi->sw_lock);
 519                 if (ftdi_elan_synchronize(ftdi) == 0) {
 520                         ftdi->synchronized = 1;
 521                         ftdi_command_queue_work(ftdi, 1);
 522                         ftdi_respond_queue_work(ftdi, 1);
 523                         up(&ftdi->sw_lock);
 524                         work_delay_in_msec = 100;
 525                 } else {
 526                         dev_err(&ftdi->udev->dev, "synchronize failed\n");
 527                         up(&ftdi->sw_lock);
 528                         work_delay_in_msec = 10 *1000;
 529                 }
 530         } else if (ftdi->stuck_status > 0) {
 531                 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
 532                         ftdi->stuck_status = 0;
 533                         ftdi->synchronized = 0;
 534                 } else if ((ftdi->stuck_status++ % 60) == 1) {
 535                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
 536                                 "- please remove\n");
 537                 } else
 538                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
 539                                 "- checked %d times\n", ftdi->stuck_status);
 540                 work_delay_in_msec = 100;
 541         } else if (ftdi->enumerated == 0) {
 542                 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
 543                         ftdi->enumerated = 1;
 544                         work_delay_in_msec = 250;
 545                 } else
 546                         work_delay_in_msec = 1000;
 547         } else if (ftdi->initialized == 0) {
 548                 if (ftdi_elan_setupOHCI(ftdi) == 0) {
 549                         ftdi->initialized = 1;
 550                         work_delay_in_msec = 500;
 551                 } else {
 552                         dev_err(&ftdi->udev->dev, "initialized failed - trying "
 553                                 "again in 10 seconds\n");
 554                         work_delay_in_msec = 10 *1000;
 555                 }
 556         } else if (ftdi->registered == 0) {
 557                 work_delay_in_msec = 10;
 558                 if (ftdi_elan_hcd_init(ftdi) == 0) {
 559                         ftdi->registered = 1;
 560                 } else
 561                         dev_err(&ftdi->udev->dev, "register failed\n");
 562                 work_delay_in_msec = 250;
 563         } else {
 564                 if (ftdi_elan_checkingPCI(ftdi) == 0) {
 565                         work_delay_in_msec = 250;
 566                 } else if (ftdi->controlreg & 0x00400000) {
 567                         if (ftdi->gone_away > 0) {
 568                                 dev_err(&ftdi->udev->dev, "PCI device eject con"
 569                                         "firmed platform_dev.dev.parent=%p plat"
 570                                         "form_dev.dev=%p\n",
 571                                         ftdi->platform_dev.dev.parent,
 572                                         &ftdi->platform_dev.dev);
 573                                 platform_device_unregister(&ftdi->platform_dev);
 574                                 ftdi->platform_dev.dev.parent = NULL;
 575                                 ftdi->registered = 0;
 576                                 ftdi->enumerated = 0;
 577                                 ftdi->card_ejected = 0;
 578                                 ftdi->initialized = 0;
 579                                 ftdi->gone_away = 0;
 580                         } else
 581                                 ftdi_elan_flush_targets(ftdi);
 582                         work_delay_in_msec = 250;
 583                 } else {
 584                         dev_err(&ftdi->udev->dev, "PCI device has disappeared\n"
 585                                 );
 586                         ftdi_elan_cancel_targets(ftdi);
 587                         work_delay_in_msec = 500;
 588                         ftdi->enumerated = 0;
 589                         ftdi->initialized = 0;
 590                 }
 591         }
 592         if (ftdi->disconnected > 0) {
 593                 ftdi_elan_put_kref(ftdi);
 594                 return;
 595         } else {
 596                 ftdi_status_requeue_work(ftdi,
 597                         msecs_to_jiffies(work_delay_in_msec));
 598                 return;
 599         }
 600 }
 601
 602
 603 /*
 604 * file_operations for the jtag interface
 605 *
 606 * the usage count for the device is incremented on open()
 607 * and decremented on release()
 608 */
 609 static int ftdi_elan_open(struct inode *inode, struct file *file)
 610 {
 611         int subminor = iminor(inode);
 612         struct usb_interface *interface = usb_find_interface(&ftdi_elan_driver,
 613                 subminor);
 614         if (!interface) {
 615                 printk(KERN_ERR "can't find device for minor %d\n", subminor);
 616                 return -ENODEV;
 617         } else {
 618                 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
 619                 if (!ftdi) {
 620                         return -ENODEV;
 621                 } else {
 622                         if (down_interruptible(&ftdi->sw_lock)) {
 623                                 return -EINTR;
 624                         } else {
 625                                 ftdi_elan_get_kref(ftdi);
 626                                 file->private_data = ftdi;
 627                                 return 0;
 628                         }
 629                 }
 630         }
 631 }
 632
 633 static int ftdi_elan_release(struct inode *inode, struct file *file)
 634 {
 635         struct usb_ftdi *ftdi = (struct usb_ftdi *)file->private_data;
 636         if (ftdi == NULL)
 637                 return -ENODEV;
 638         up(&ftdi->sw_lock);        /* decrement the count on our device */
 639         ftdi_elan_put_kref(ftdi);
 640         return 0;
 641 }
 642
 643
 644 #define FTDI_ELAN_IOC_MAGIC 0xA1
 645 #define FTDI_ELAN_IOCDEBUG _IOC(_IOC_WRITE, FTDI_ELAN_IOC_MAGIC, 1, 132)
 646 static int ftdi_elan_ioctl(struct inode *inode, struct file *file,
 647         unsigned int cmd, unsigned long arg)
 648 {
 649         switch (cmd) {
 650         case FTDI_ELAN_IOCDEBUG:{
 651                         char line[132];
 652                         int size = strncpy_from_user(line,
 653                                 (const char __user *)arg, sizeof(line));
 654                         if (size < 0) {
 655                                 return -EINVAL;
 656                         } else {
 657                                 printk(KERN_ERR "TODO: ioctl %s\n", line);
 658                                 return 0;
 659                         }
 660                 }
 661         default:
 662                 return -EFAULT;
 663         }
 664 }
 665
 666
 667 /*
 668 *
 669 * blocking bulk reads are used to get data from the device
 670 *
 671 */
 672 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 673                               size_t count, loff_t *ppos)
 674 {
 675         char data[30 *3 + 4];
 676         char *d = data;
 677         int m = (sizeof(data) - 1) / 3;
 678         int bytes_read = 0;
 679         int retry_on_empty = 10;
 680         int retry_on_timeout = 5;
 681         struct usb_ftdi *ftdi = (struct usb_ftdi *)file->private_data;
 682         if (ftdi->disconnected > 0) {
 683                 return -ENODEV;
 684         }
 685         data[0] = 0;
 686       have:if (ftdi->bulk_in_left > 0) {
 687                 if (count-- > 0) {
 688                         char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 689                         ftdi->bulk_in_left -= 1;
 690                         if (bytes_read < m) {
 691                                 d += sprintf(d, " %02X", 0x000000FF & *p);
 692                         } else if (bytes_read > m) {
 693                         } else
 694                                 d += sprintf(d, " ..");
 695                         if (copy_to_user(buffer++, p, 1)) {
 696                                 return -EFAULT;
 697                         } else {
 698                                 bytes_read += 1;
 699                                 goto have;
 700                         }
 701                 } else
 702                         return bytes_read;
 703         }
 704       more:if (count > 0) {
 705                 int packet_bytes = 0;
 706                 int retval = usb_bulk_msg(ftdi->udev,
 707                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 708                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 709                         &packet_bytes, msecs_to_jiffies(50));
 710                 if (packet_bytes > 2) {
 711                         ftdi->bulk_in_left = packet_bytes - 2;
 712                         ftdi->bulk_in_last = 1;
 713                         goto have;
 714                 } else if (retval == -ETIMEDOUT) {
 715                         if (retry_on_timeout-- > 0) {
 716                                 goto more;
 717                         } else if (bytes_read > 0) {
 718                                 return bytes_read;
 719                         } else
 720                                 return retval;
 721                 } else if (retval == 0) {
 722                         if (retry_on_empty-- > 0) {
 723                                 goto more;
 724                         } else
 725                                 return bytes_read;
 726                 } else
 727                         return retval;
 728         } else
 729                 return bytes_read;
 730 }
 731
 732 static void ftdi_elan_write_bulk_callback(struct urb *urb)
 733 {
 734         struct usb_ftdi *ftdi = (struct usb_ftdi *)urb->context;
 735         if (urb->status && !(urb->status == -ENOENT || urb->status ==
 736                 -ECONNRESET || urb->status == -ESHUTDOWN)) {
 737                 dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %"
 738                         "d\n", urb, urb->status);
 739         }
 740         usb_buffer_free(urb->dev, urb->transfer_buffer_length,
 741                 urb->transfer_buffer, urb->transfer_dma);
 742 }
 743
 744 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 745         char *buf, int command_size, int total_size)
 746 {
 747         int ed_commands = 0;
 748         int b = 0;
 749         int I = command_size;
 750         int i = ftdi->command_head;
 751         while (I-- > 0) {
 752                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 753                         i++];
 754                 int F = command->follows;
 755                 u8 *f = command->buffer;
 756                 if (command->header & 0x80) {
 757                         ed_commands |= 1 << (0x3 & (command->header >> 5));
 758                 }
 759                 buf[b++] = command->header;
 760                 buf[b++] = (command->length >> 0) & 0x00FF;
 761                 buf[b++] = (command->length >> 8) & 0x00FF;
 762                 buf[b++] = command->address;
 763                 buf[b++] = command->width;
 764                 while (F-- > 0) {
 765                         buf[b++] = *f++;
 766                 }
 767         }
 768         return ed_commands;
 769 }
 770
 771 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 772 {
 773         int total_size = 0;
 774         int I = command_size;
 775         int i = ftdi->command_head;
 776         while (I-- > 0) {
 777                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 778                         i++];
 779                 total_size += 5 + command->follows;
 780         } return total_size;
 781 }
 782
 783 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 784 {
 785         int retval;
 786         char *buf;
 787         int ed_commands;
 788         int total_size;
 789         struct urb *urb;
 790         int command_size = ftdi->command_next - ftdi->command_head;
 791         if (command_size == 0)
 792                 return 0;
 793         total_size = ftdi_elan_total_command_size(ftdi, command_size);
 794         urb = usb_alloc_urb(0, GFP_KERNEL);
 795         if (!urb) {
 796                 dev_err(&ftdi->udev->dev, "could not get a urb to write %d comm"
 797                         "ands totaling %d bytes to the Uxxx\n", command_size,
 798                         total_size);
 799                 return -ENOMEM;
 800         }
 801         buf = usb_buffer_alloc(ftdi->udev, total_size, GFP_KERNEL,
 802                 &urb->transfer_dma);
 803         if (!buf) {
 804                 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d c"
 805                         "ommands totaling %d bytes to the Uxxx\n", command_size,
 806                          total_size);
 807                 usb_free_urb(urb);
 808                 return -ENOMEM;
 809         }
 810         ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 811                 command_size, total_size);
 812         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 813                 ftdi->bulk_out_endpointAddr), buf, total_size,
 814                 ftdi_elan_write_bulk_callback, ftdi);
 815         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 816         if (ed_commands) {
 817                 char diag[40 *3 + 4];
 818                 char *d = diag;
 819                 int m = total_size;
 820                 u8 *c = buf;
 821                 int s = (sizeof(diag) - 1) / 3;
 822                 diag[0] = 0;
 823                 while (s-- > 0 && m-- > 0) {
 824                         if (s > 0 || m == 0) {
 825                                 d += sprintf(d, " %02X", *c++);
 826                         } else
 827                                 d += sprintf(d, " ..");
 828                 }
 829         }
 830         retval = usb_submit_urb(urb, GFP_KERNEL);
 831         if (retval) {
 832                 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write "
 833                         "%d commands totaling %d bytes to the Uxxx\n", retval,
 834                         urb, command_size, total_size);
 835                 usb_buffer_free(ftdi->udev, total_size, buf, urb->transfer_dma);
 836                 usb_free_urb(urb);
 837                 return retval;
 838         }
 839         usb_free_urb(urb);        /* release our reference to this urb,
 840                 the USB core will eventually free it entirely */
 841         ftdi->command_head += command_size;
 842         ftdi_elan_kick_respond_queue(ftdi);
 843         return 0;
 844 }
 845
 846 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 847         struct u132_target *target, u8 *buffer, int length)
 848 {
 849         struct urb *urb = target->urb;
 850         int halted = target->halted;
 851         int skipped = target->skipped;
 852         int actual = target->actual;
 853         int non_null = target->non_null;
 854         int toggle_bits = target->toggle_bits;
 855         int error_count = target->error_count;
 856         int condition_code = target->condition_code;
 857         int repeat_number = target->repeat_number;
 858         void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 859                 int, int, int, int) = target->callback;
 860         target->active -= 1;
 861         target->callback = NULL;
 862         (*callback) (target->endp, urb, buffer, length, toggle_bits,
 863                 error_count, condition_code, repeat_number, halted, skipped,
 864                 actual, non_null);
 865 }
 866
 867 static char *have_ed_set_response(struct usb_ftdi *ftdi,
 868         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 869         char *b)
 870 {
 871         int payload = (ed_length >> 0) & 0x07FF;
 872         down(&ftdi->u132_lock);
 873         target->actual = 0;
 874         target->non_null = (ed_length >> 15) & 0x0001;
 875         target->repeat_number = (ed_length >> 11) & 0x000F;
 876         if (ed_type == 0x02) {
 877                 if (payload == 0 || target->abandoning > 0) {
 878                         target->abandoning = 0;
 879                         up(&ftdi->u132_lock);
 880                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 881                                 payload);
 882                         ftdi->recieved = 0;
 883                         ftdi->expected = 4;
 884                         ftdi->ed_found = 0;
 885                         return ftdi->response;
 886                 } else {
 887                         ftdi->expected = 4 + payload;
 888                         ftdi->ed_found = 1;
 889                         up(&ftdi->u132_lock);
 890                         return b;
 891                 }
 892         } else if (ed_type == 0x03) {
 893                 if (payload == 0 || target->abandoning > 0) {
 894                         target->abandoning = 0;
 895                         up(&ftdi->u132_lock);
 896                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 897                                 payload);
 898                         ftdi->recieved = 0;
 899                         ftdi->expected = 4;
 900                         ftdi->ed_found = 0;
 901                         return ftdi->response;
 902                 } else {
 903                         ftdi->expected = 4 + payload;
 904                         ftdi->ed_found = 1;
 905                         up(&ftdi->u132_lock);
 906                         return b;
 907                 }
 908         } else if (ed_type == 0x01) {
 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                 target->abandoning = 0;
 919                 up(&ftdi->u132_lock);
 920                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 921                         payload);
 922                 ftdi->recieved = 0;
 923                 ftdi->expected = 4;
 924                 ftdi->ed_found = 0;
 925                 return ftdi->response;
 926         }
 927 }
 928
 929 static char *have_ed_get_response(struct usb_ftdi *ftdi,
 930         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 931         char *b)
 932 {
 933         down(&ftdi->u132_lock);
 934         target->condition_code = TD_DEVNOTRESP;
 935         target->actual = (ed_length >> 0) & 0x01FF;
 936         target->non_null = (ed_length >> 15) & 0x0001;
 937         target->repeat_number = (ed_length >> 11) & 0x000F;
 938         up(&ftdi->u132_lock);
 939         if (target->active)
 940                 ftdi_elan_do_callback(ftdi, target, NULL, 0);
 941         target->abandoning = 0;
 942         ftdi->recieved = 0;
 943         ftdi->expected = 4;
 944         ftdi->ed_found = 0;
 945         return ftdi->response;
 946 }
 947
 948
 949 /*
 950 * The engine tries to empty the FTDI fifo
 951 *
 952 * all responses found in the fifo data are dispatched thus
 953 * the response buffer can only ever hold a maximum sized
 954 * response from the Uxxx.
 955 *
 956 */
 957 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 958 {
 959         u8 *b = ftdi->response + ftdi->recieved;
 960         int bytes_read = 0;
 961         int retry_on_empty = 1;
 962         int retry_on_timeout = 3;
 963         int empty_packets = 0;
 964       read:{
 965                 int packet_bytes = 0;
 966                 int retval = usb_bulk_msg(ftdi->udev,
 967                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 968                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 969                         &packet_bytes, msecs_to_jiffies(500));
 970                 char diag[30 *3 + 4];
 971                 char *d = diag;
 972                 int m = packet_bytes;
 973                 u8 *c = ftdi->bulk_in_buffer;
 974                 int s = (sizeof(diag) - 1) / 3;
 975                 diag[0] = 0;
 976                 while (s-- > 0 && m-- > 0) {
 977                         if (s > 0 || m == 0) {
 978                                 d += sprintf(d, " %02X", *c++);
 979                         } else
 980                                 d += sprintf(d, " ..");
 981                 }
 982                 if (packet_bytes > 2) {
 983                         ftdi->bulk_in_left = packet_bytes - 2;
 984                         ftdi->bulk_in_last = 1;
 985                         goto have;
 986                 } else if (retval == -ETIMEDOUT) {
 987                         if (retry_on_timeout-- > 0) {
 988                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
 989                                         "t_bytes = %d with total %d bytes%s\n",
 990                                         packet_bytes, bytes_read, diag);
 991                                 goto more;
 992                         } else if (bytes_read > 0) {
 993                                 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
 994                                         bytes_read, diag);
 995                                 return -ENOMEM;
 996                         } else {
 997                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
 998                                         "t_bytes = %d with total %d bytes%s\n",
 999                                         packet_bytes, bytes_read, diag);
1000                                 return -ENOMEM;
1001                         }
1002                 } else if (retval == -EILSEQ) {
1003                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1004                                 " = %d with total %d bytes%s\n", retval,
1005                                 packet_bytes, bytes_read, diag);
1006                         return retval;
1007                 } else if (retval) {
1008                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1009                                 " = %d with total %d bytes%s\n", retval,
1010                                 packet_bytes, bytes_read, diag);
1011                         return retval;
1012                 } else if (packet_bytes == 2) {
1013                         unsigned char s0 = ftdi->bulk_in_buffer[0];
1014                         unsigned char s1 = ftdi->bulk_in_buffer[1];
1015                         empty_packets += 1;
1016                         if (s0 == 0x31 && s1 == 0x60) {
1017                                 if (retry_on_empty-- > 0) {
1018                                         goto more;
1019                                 } else
1020                                         return 0;
1021                         } else if (s0 == 0x31 && s1 == 0x00) {
1022                                 if (retry_on_empty-- > 0) {
1023                                         goto more;
1024                                 } else
1025                                         return 0;
1026                         } else {
1027                                 if (retry_on_empty-- > 0) {
1028                                         goto more;
1029                                 } else
1030                                         return 0;
1031                         }
1032                 } else if (packet_bytes == 1) {
1033                         if (retry_on_empty-- > 0) {
1034                                 goto more;
1035                         } else
1036                                 return 0;
1037                 } else {
1038                         if (retry_on_empty-- > 0) {
1039                                 goto more;
1040                         } else
1041                                 return 0;
1042                 }
1043         }
1044       more:{
1045                 goto read;
1046         }
1047       have:if (ftdi->bulk_in_left > 0) {
1048                 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1049                 bytes_read += 1;
1050                 ftdi->bulk_in_left -= 1;
1051                 if (ftdi->recieved == 0 && c == 0xFF) {
1052                         goto have;
1053                 } else
1054                         *b++ = c;
1055                 if (++ftdi->recieved < ftdi->expected) {
1056                         goto have;
1057                 } else if (ftdi->ed_found) {
1058                         int ed_number = (ftdi->response[0] >> 5) & 0x03;
1059                         u16 ed_length = (ftdi->response[2] << 8) |
1060                                 ftdi->response[1];
1061                         struct u132_target *target = &ftdi->target[ed_number];
1062                         int payload = (ed_length >> 0) & 0x07FF;
1063                         char diag[30 *3 + 4];
1064                         char *d = diag;
1065                         int m = payload;
1066                         u8 *c = 4 + ftdi->response;
1067                         int s = (sizeof(diag) - 1) / 3;
1068                         diag[0] = 0;
1069                         while (s-- > 0 && m-- > 0) {
1070                                 if (s > 0 || m == 0) {
1071                                         d += sprintf(d, " %02X", *c++);
1072                                 } else
1073                                         d += sprintf(d, " ..");
1074                         }
1075                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1076                                 payload);
1077                         ftdi->recieved = 0;
1078                         ftdi->expected = 4;
1079                         ftdi->ed_found = 0;
1080                         b = ftdi->response;
1081                         goto have;
1082                 } else if (ftdi->expected == 8) {
1083                         u8 buscmd;
1084                         int respond_head = ftdi->respond_head++;
1085                         struct u132_respond *respond = &ftdi->respond[
1086                                 RESPOND_MASK & respond_head];
1087                         u32 data = ftdi->response[7];
1088                         data <<= 8;
1089                         data |= ftdi->response[6];
1090                         data <<= 8;
1091                         data |= ftdi->response[5];
1092                         data <<= 8;
1093                         data |= ftdi->response[4];
1094                         *respond->value = data;
1095                         *respond->result = 0;
1096                         complete(&respond->wait_completion);
1097                         ftdi->recieved = 0;
1098                         ftdi->expected = 4;
1099                         ftdi->ed_found = 0;
1100                         b = ftdi->response;
1101                         buscmd = (ftdi->response[0] >> 0) & 0x0F;
1102                         if (buscmd == 0x00) {
1103                         } else if (buscmd == 0x02) {
1104                         } else if (buscmd == 0x06) {
1105                         } else if (buscmd == 0x0A) {
1106                         } else
1107                                 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) va"
1108                                         "lue = %08X\n", buscmd, data);
1109                         goto have;
1110                 } else {
1111                         if ((ftdi->response[0] & 0x80) == 0x00) {
1112                                 ftdi->expected = 8;
1113                                 goto have;
1114                         } else {
1115                                 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1116                                 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1117                                 u16 ed_length = (ftdi->response[2] << 8) |
1118                                         ftdi->response[1];
1119                                 struct u132_target *target = &ftdi->target[
1120                                         ed_number];
1121                                 target->halted = (ftdi->response[0] >> 3) &
1122                                         0x01;
1123                                 target->skipped = (ftdi->response[0] >> 2) &
1124                                         0x01;
1125                                 target->toggle_bits = (ftdi->response[3] >> 6)
1126                                         & 0x03;
1127                                 target->error_count = (ftdi->response[3] >> 4)
1128                                         & 0x03;
1129                                 target->condition_code = (ftdi->response[
1130                                         3] >> 0) & 0x0F;
1131                                 if ((ftdi->response[0] & 0x10) == 0x00) {
1132                                         b = have_ed_set_response(ftdi, target,
1133                                                 ed_length, ed_number, ed_type,
1134                                                 b);
1135                                         goto have;
1136                                 } else {
1137                                         b = have_ed_get_response(ftdi, target,
1138                                                 ed_length, ed_number, ed_type,
1139                                                 b);
1140                                         goto have;
1141                                 }
1142                         }
1143                 }
1144         } else
1145                 goto more;
1146 }
1147
1148
1149 /*
1150 * create a urb, and a buffer for it, and copy the data to the urb
1151 *
1152 */
1153 static ssize_t ftdi_elan_write(struct file *file,
1154                                const char __user *user_buffer, size_t count,
1155                                loff_t *ppos)
1156 {
1157         int retval = 0;
1158         struct urb *urb;
1159         char *buf;
1160         struct usb_ftdi *ftdi = file->private_data;
1161
1162         if (ftdi->disconnected > 0) {
1163                 return -ENODEV;
1164         }
1165         if (count == 0) {
1166                 goto exit;
1167         }
1168         urb = usb_alloc_urb(0, GFP_KERNEL);
1169         if (!urb) {
1170                 retval = -ENOMEM;
1171                 goto error_1;
1172         }
1173         buf = usb_buffer_alloc(ftdi->udev, count, GFP_KERNEL,
1174                 &urb->transfer_dma);
1175         if (!buf) {
1176                 retval = -ENOMEM;
1177                 goto error_2;
1178         }
1179         if (copy_from_user(buf, user_buffer, count)) {
1180                 retval = -EFAULT;
1181                 goto error_3;
1182         }
1183         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1184                 ftdi->bulk_out_endpointAddr), buf, count,
1185                 ftdi_elan_write_bulk_callback, ftdi);
1186         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1187         retval = usb_submit_urb(urb, GFP_KERNEL);
1188         if (retval) {
1189                 dev_err(&ftdi->udev->dev, "failed submitting write urb, error %"
1190                         "d\n", retval);
1191                 goto error_3;
1192         }
1193         usb_free_urb(urb);
1194
1195 exit:
1196         return count;
1197 error_3:
1198         usb_buffer_free(ftdi->udev, count, buf, urb->transfer_dma);
1199 error_2:
1200         usb_free_urb(urb);
1201 error_1:
1202         return retval;
1203 }
1204
1205 static struct file_operations ftdi_elan_fops = {
1206         .owner = THIS_MODULE,
1207         .llseek = no_llseek,
1208         .ioctl = ftdi_elan_ioctl,
1209         .read = ftdi_elan_read,
1210         .write = ftdi_elan_write,
1211         .open = ftdi_elan_open,
1212         .release = ftdi_elan_release,
1213 };
1214
1215 /*
1216 * usb class driver info in order to get a minor number from the usb core,
1217 * and to have the device registered with the driver core
1218 */
1219 static struct usb_class_driver ftdi_elan_jtag_class = {
1220         .name = "ftdi-%d-jtag",
1221         .fops = &ftdi_elan_fops,
1222         .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1223 };
1224
1225 /*
1226 * the following definitions are for the
1227 * ELAN FPGA state machgine processor that
1228 * lies on the other side of the FTDI chip
1229 */
1230 #define cPCIu132rd 0x0
1231 #define cPCIu132wr 0x1
1232 #define cPCIiord 0x2
1233 #define cPCIiowr 0x3
1234 #define cPCImemrd 0x6
1235 #define cPCImemwr 0x7
1236 #define cPCIcfgrd 0xA
1237 #define cPCIcfgwr 0xB
1238 #define cPCInull 0xF
1239 #define cU132cmd_status 0x0
1240 #define cU132flash 0x1
1241 #define cPIDsetup 0x0
1242 #define cPIDout 0x1
1243 #define cPIDin 0x2
1244 #define cPIDinonce 0x3
1245 #define cCCnoerror 0x0
1246 #define cCCcrc 0x1
1247 #define cCCbitstuff 0x2
1248 #define cCCtoggle 0x3
1249 #define cCCstall 0x4
1250 #define cCCnoresp 0x5
1251 #define cCCbadpid1 0x6
1252 #define cCCbadpid2 0x7
1253 #define cCCdataoverrun 0x8
1254 #define cCCdataunderrun 0x9
1255 #define cCCbuffoverrun 0xC
1256 #define cCCbuffunderrun 0xD
1257 #define cCCnotaccessed 0xF
1258 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1259 {
1260       wait:if (ftdi->disconnected > 0) {
1261                 return -ENODEV;
1262         } else {
1263                 int command_size;
1264                 down(&ftdi->u132_lock);
1265                 command_size = ftdi->command_next - ftdi->command_head;
1266                 if (command_size < COMMAND_SIZE) {
1267                         struct u132_command *command = &ftdi->command[
1268                                 COMMAND_MASK & ftdi->command_next];
1269                         command->header = 0x00 | cPCIu132wr;
1270                         command->length = 0x04;
1271                         command->address = 0x00;
1272                         command->width = 0x00;
1273                         command->follows = 4;
1274                         command->value = data;
1275                         command->buffer = &command->value;
1276                         ftdi->command_next += 1;
1277                         ftdi_elan_kick_command_queue(ftdi);
1278                         up(&ftdi->u132_lock);
1279                         return 0;
1280                 } else {
1281                         up(&ftdi->u132_lock);
1282                         msleep(100);
1283                         goto wait;
1284                 }
1285         }
1286 }
1287
1288 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1289         u8 width, u32 data)
1290 {
1291         u8 addressofs = config_offset / 4;
1292       wait:if (ftdi->disconnected > 0) {
1293                 return -ENODEV;
1294         } else {
1295                 int command_size;
1296                 down(&ftdi->u132_lock);
1297                 command_size = ftdi->command_next - ftdi->command_head;
1298                 if (command_size < COMMAND_SIZE) {
1299                         struct u132_command *command = &ftdi->command[
1300                                 COMMAND_MASK & ftdi->command_next];
1301                         command->header = 0x00 | (cPCIcfgwr & 0x0F);
1302                         command->length = 0x04;
1303                         command->address = addressofs;
1304                         command->width = 0x00 | (width & 0x0F);
1305                         command->follows = 4;
1306                         command->value = data;
1307                         command->buffer = &command->value;
1308                         ftdi->command_next += 1;
1309                         ftdi_elan_kick_command_queue(ftdi);
1310                         up(&ftdi->u132_lock);
1311                         return 0;
1312                 } else {
1313                         up(&ftdi->u132_lock);
1314                         msleep(100);
1315                         goto wait;
1316                 }
1317         }
1318 }
1319
1320 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1321         u8 width, u32 data)
1322 {
1323         u8 addressofs = mem_offset / 4;
1324       wait:if (ftdi->disconnected > 0) {
1325                 return -ENODEV;
1326         } else {
1327                 int command_size;
1328                 down(&ftdi->u132_lock);
1329                 command_size = ftdi->command_next - ftdi->command_head;
1330                 if (command_size < COMMAND_SIZE) {
1331                         struct u132_command *command = &ftdi->command[
1332                                 COMMAND_MASK & ftdi->command_next];
1333                         command->header = 0x00 | (cPCImemwr & 0x0F);
1334                         command->length = 0x04;
1335                         command->address = addressofs;
1336                         command->width = 0x00 | (width & 0x0F);
1337                         command->follows = 4;
1338                         command->value = data;
1339                         command->buffer = &command->value;
1340                         ftdi->command_next += 1;
1341                         ftdi_elan_kick_command_queue(ftdi);
1342                         up(&ftdi->u132_lock);
1343                         return 0;
1344                 } else {
1345                         up(&ftdi->u132_lock);
1346                         msleep(100);
1347                         goto wait;
1348                 }
1349         }
1350 }
1351
1352 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1353         u8 width, u32 data)
1354 {
1355         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1356         return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1357 }
1358
1359
1360 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1361 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1362 {
1363       wait:if (ftdi->disconnected > 0) {
1364                 return -ENODEV;
1365         } else {
1366                 int command_size;
1367                 int respond_size;
1368                 down(&ftdi->u132_lock);
1369                 command_size = ftdi->command_next - ftdi->command_head;
1370                 respond_size = ftdi->respond_next - ftdi->respond_head;
1371                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1372                         {
1373                         struct u132_command *command = &ftdi->command[
1374                                 COMMAND_MASK & ftdi->command_next];
1375                         struct u132_respond *respond = &ftdi->respond[
1376                                 RESPOND_MASK & ftdi->respond_next];
1377                         int result = -ENODEV;
1378                         respond->result = &result;
1379                         respond->header = command->header = 0x00 | cPCIu132rd;
1380                         command->length = 0x04;
1381                         respond->address = command->address = cU132cmd_status;
1382                         command->width = 0x00;
1383                         command->follows = 0;
1384                         command->value = 0;
1385                         command->buffer = NULL;
1386                         respond->value = data;
1387                         init_completion(&respond->wait_completion);
1388                         ftdi->command_next += 1;
1389                         ftdi->respond_next += 1;
1390                         ftdi_elan_kick_command_queue(ftdi);
1391                         up(&ftdi->u132_lock);
1392                         wait_for_completion(&respond->wait_completion);
1393                         return result;
1394                 } else {
1395                         up(&ftdi->u132_lock);
1396                         msleep(100);
1397                         goto wait;
1398                 }
1399         }
1400 }
1401
1402 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1403         u8 width, u32 *data)
1404 {
1405         u8 addressofs = config_offset / 4;
1406       wait:if (ftdi->disconnected > 0) {
1407                 return -ENODEV;
1408         } else {
1409                 int command_size;
1410                 int respond_size;
1411                 down(&ftdi->u132_lock);
1412                 command_size = ftdi->command_next - ftdi->command_head;
1413                 respond_size = ftdi->respond_next - ftdi->respond_head;
1414                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1415                         {
1416                         struct u132_command *command = &ftdi->command[
1417                                 COMMAND_MASK & ftdi->command_next];
1418                         struct u132_respond *respond = &ftdi->respond[
1419                                 RESPOND_MASK & ftdi->respond_next];
1420                         int result = -ENODEV;
1421                         respond->result = &result;
1422                         respond->header = command->header = 0x00 | (cPCIcfgrd &
1423                                 0x0F);
1424                         command->length = 0x04;
1425                         respond->address = command->address = addressofs;
1426                         command->width = 0x00 | (width & 0x0F);
1427                         command->follows = 0;
1428                         command->value = 0;
1429                         command->buffer = NULL;
1430                         respond->value = data;
1431                         init_completion(&respond->wait_completion);
1432                         ftdi->command_next += 1;
1433                         ftdi->respond_next += 1;
1434                         ftdi_elan_kick_command_queue(ftdi);
1435                         up(&ftdi->u132_lock);
1436                         wait_for_completion(&respond->wait_completion);
1437                         return result;
1438                 } else {
1439                         up(&ftdi->u132_lock);
1440                         msleep(100);
1441                         goto wait;
1442                 }
1443         }
1444 }
1445
1446 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1447         u8 width, u32 *data)
1448 {
1449         u8 addressofs = mem_offset / 4;
1450       wait:if (ftdi->disconnected > 0) {
1451                 return -ENODEV;
1452         } else {
1453                 int command_size;
1454                 int respond_size;
1455                 down(&ftdi->u132_lock);
1456                 command_size = ftdi->command_next - ftdi->command_head;
1457                 respond_size = ftdi->respond_next - ftdi->respond_head;
1458                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1459                         {
1460                         struct u132_command *command = &ftdi->command[
1461                                 COMMAND_MASK & ftdi->command_next];
1462                         struct u132_respond *respond = &ftdi->respond[
1463                                 RESPOND_MASK & ftdi->respond_next];
1464                         int result = -ENODEV;
1465                         respond->result = &result;
1466                         respond->header = command->header = 0x00 | (cPCImemrd &
1467                                 0x0F);
1468                         command->length = 0x04;
1469                         respond->address = command->address = addressofs;
1470                         command->width = 0x00 | (width & 0x0F);
1471                         command->follows = 0;
1472                         command->value = 0;
1473                         command->buffer = NULL;
1474                         respond->value = data;
1475                         init_completion(&respond->wait_completion);
1476                         ftdi->command_next += 1;
1477                         ftdi->respond_next += 1;
1478                         ftdi_elan_kick_command_queue(ftdi);
1479                         up(&ftdi->u132_lock);
1480                         wait_for_completion(&respond->wait_completion);
1481                         return result;
1482                 } else {
1483                         up(&ftdi->u132_lock);
1484                         msleep(100);
1485                         goto wait;
1486                 }
1487         }
1488 }
1489
1490 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1491         u8 width, u32 *data)
1492 {
1493         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1494         if (ftdi->initialized == 0) {
1495                 return -ENODEV;
1496         } else
1497                 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1498 }
1499
1500
1501 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1502 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1503         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1504         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1505         int toggle_bits, int error_count, int condition_code, int repeat_number,
1506          int halted, int skipped, int actual, int non_null))
1507 {
1508         u8 ed = ed_number - 1;
1509       wait:if (ftdi->disconnected > 0) {
1510                 return -ENODEV;
1511         } else if (ftdi->initialized == 0) {
1512                 return -ENODEV;
1513         } else {
1514                 int command_size;
1515                 down(&ftdi->u132_lock);
1516                 command_size = ftdi->command_next - ftdi->command_head;
1517                 if (command_size < COMMAND_SIZE) {
1518                         struct u132_target *target = &ftdi->target[ed];
1519                         struct u132_command *command = &ftdi->command[
1520                                 COMMAND_MASK & ftdi->command_next];
1521                         command->header = 0x80 | (ed << 5);
1522                         command->length = 0x8007;
1523                         command->address = (toggle_bits << 6) | (ep_number << 2)
1524                                 | (address << 0);
1525                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1526                                 usb_pipeout(urb->pipe));
1527                         command->follows = 8;
1528                         command->value = 0;
1529                         command->buffer = urb->setup_packet;
1530                         target->callback = callback;
1531                         target->endp = endp;
1532                         target->urb = urb;
1533                         target->active = 1;
1534                         ftdi->command_next += 1;
1535                         ftdi_elan_kick_command_queue(ftdi);
1536                         up(&ftdi->u132_lock);
1537                         return 0;
1538                 } else {
1539                         up(&ftdi->u132_lock);
1540                         msleep(100);
1541                         goto wait;
1542                 }
1543         }
1544 }
1545
1546 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1547         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1548         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1549         int toggle_bits, int error_count, int condition_code, int repeat_number,
1550          int halted, int skipped, int actual, int non_null))
1551 {
1552         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1553         return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1554                 ep_number, toggle_bits, callback);
1555 }
1556
1557
1558 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1559 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1560         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1561         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1562         int toggle_bits, int error_count, int condition_code, int repeat_number,
1563          int halted, int skipped, int actual, int non_null))
1564 {
1565         u8 ed = ed_number - 1;
1566       wait:if (ftdi->disconnected > 0) {
1567                 return -ENODEV;
1568         } else if (ftdi->initialized == 0) {
1569                 return -ENODEV;
1570         } else {
1571                 int command_size;
1572                 down(&ftdi->u132_lock);
1573                 command_size = ftdi->command_next - ftdi->command_head;
1574                 if (command_size < COMMAND_SIZE) {
1575                         struct u132_target *target = &ftdi->target[ed];
1576                         struct u132_command *command = &ftdi->command[
1577                                 COMMAND_MASK & ftdi->command_next];
1578                         int remaining_length = urb->transfer_buffer_length -
1579                                 urb->actual_length;
1580                         command->header = 0x82 | (ed << 5);
1581                         if (remaining_length == 0) {
1582                                 command->length = 0x0000;
1583                         } else if (remaining_length > 1024) {
1584                                 command->length = 0x8000 | 1023;
1585                         } else
1586                                 command->length = 0x8000 | (remaining_length -
1587                                         1);
1588                         command->address = (toggle_bits << 6) | (ep_number << 2)
1589                                 | (address << 0);
1590                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1591                                 usb_pipeout(urb->pipe));
1592                         command->follows = 0;
1593                         command->value = 0;
1594                         command->buffer = NULL;
1595                         target->callback = callback;
1596                         target->endp = endp;
1597                         target->urb = urb;
1598                         target->active = 1;
1599                         ftdi->command_next += 1;
1600                         ftdi_elan_kick_command_queue(ftdi);
1601                         up(&ftdi->u132_lock);
1602                         return 0;
1603                 } else {
1604                         up(&ftdi->u132_lock);
1605                         msleep(100);
1606                         goto wait;
1607                 }
1608         }
1609 }
1610
1611 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1612         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1613         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1614         int toggle_bits, int error_count, int condition_code, int repeat_number,
1615          int halted, int skipped, int actual, int non_null))
1616 {
1617         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1618         return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1619                 ep_number, toggle_bits, callback);
1620 }
1621
1622
1623 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1624 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1625         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1626         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1627         int toggle_bits, int error_count, int condition_code, int repeat_number,
1628          int halted, int skipped, int actual, int non_null))
1629 {
1630         u8 ed = ed_number - 1;
1631       wait:if (ftdi->disconnected > 0) {
1632                 return -ENODEV;
1633         } else if (ftdi->initialized == 0) {
1634                 return -ENODEV;
1635         } else {
1636                 int command_size;
1637                 down(&ftdi->u132_lock);
1638                 command_size = ftdi->command_next - ftdi->command_head;
1639                 if (command_size < COMMAND_SIZE) {
1640                         struct u132_target *target = &ftdi->target[ed];
1641                         struct u132_command *command = &ftdi->command[
1642                                 COMMAND_MASK & ftdi->command_next];
1643                         command->header = 0x81 | (ed << 5);
1644                         command->length = 0x0000;
1645                         command->address = (toggle_bits << 6) | (ep_number << 2)
1646                                 | (address << 0);
1647                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1648                                 usb_pipeout(urb->pipe));
1649                         command->follows = 0;
1650                         command->value = 0;
1651                         command->buffer = NULL;
1652                         target->callback = callback;
1653                         target->endp = endp;
1654                         target->urb = urb;
1655                         target->active = 1;
1656                         ftdi->command_next += 1;
1657                         ftdi_elan_kick_command_queue(ftdi);
1658                         up(&ftdi->u132_lock);
1659                         return 0;
1660                 } else {
1661                         up(&ftdi->u132_lock);
1662                         msleep(100);
1663                         goto wait;
1664                 }
1665         }
1666 }
1667
1668 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1669         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1670         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1671         int toggle_bits, int error_count, int condition_code, int repeat_number,
1672          int halted, int skipped, int actual, int non_null))
1673 {
1674         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1675         return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1676                 ep_number, toggle_bits, callback);
1677 }
1678
1679
1680 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1681 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1682         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1683         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1684         int toggle_bits, int error_count, int condition_code, int repeat_number,
1685          int halted, int skipped, int actual, int non_null))
1686 {
1687         u8 ed = ed_number - 1;
1688       wait:if (ftdi->disconnected > 0) {
1689                 return -ENODEV;
1690         } else if (ftdi->initialized == 0) {
1691                 return -ENODEV;
1692         } else {
1693                 int command_size;
1694                 down(&ftdi->u132_lock);
1695                 command_size = ftdi->command_next - ftdi->command_head;
1696                 if (command_size < COMMAND_SIZE) {
1697                         u8 *b;
1698                         u16 urb_size;
1699                         int i = 0;
1700                         char data[30 *3 + 4];
1701                         char *d = data;
1702                         int m = (sizeof(data) - 1) / 3;
1703                         int l = 0;
1704                         struct u132_target *target = &ftdi->target[ed];
1705                         struct u132_command *command = &ftdi->command[
1706                                 COMMAND_MASK & ftdi->command_next];
1707                         command->header = 0x81 | (ed << 5);
1708                         command->address = (toggle_bits << 6) | (ep_number << 2)
1709                                 | (address << 0);
1710                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1711                                 usb_pipeout(urb->pipe));
1712                         command->follows = min(1024,
1713                                 urb->transfer_buffer_length -
1714                                 urb->actual_length);
1715                         command->value = 0;
1716                         command->buffer = urb->transfer_buffer +
1717                                 urb->actual_length;
1718                         command->length = 0x8000 | (command->follows - 1);
1719                         b = command->buffer;
1720                         urb_size = command->follows;
1721                         data[0] = 0;
1722                         while (urb_size-- > 0) {
1723                                 if (i > m) {
1724                                 } else if (i++ < m) {
1725                                         int w = sprintf(d, " %02X", *b++);
1726                                         d += w;
1727                                         l += w;
1728                                 } else
1729                                         d += sprintf(d, " ..");
1730                         }
1731                         target->callback = callback;
1732                         target->endp = endp;
1733                         target->urb = urb;
1734                         target->active = 1;
1735                         ftdi->command_next += 1;
1736                         ftdi_elan_kick_command_queue(ftdi);
1737                         up(&ftdi->u132_lock);
1738                         return 0;
1739                 } else {
1740                         up(&ftdi->u132_lock);
1741                         msleep(100);
1742                         goto wait;
1743                 }
1744         }
1745 }
1746
1747 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1748         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1749         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1750         int toggle_bits, int error_count, int condition_code, int repeat_number,
1751          int halted, int skipped, int actual, int non_null))
1752 {
1753         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1754         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1755                 ep_number, toggle_bits, callback);
1756 }
1757
1758
1759 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1760 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1761         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1762         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1763         int toggle_bits, int error_count, int condition_code, int repeat_number,
1764          int halted, int skipped, int actual, int non_null))
1765 {
1766         u8 ed = ed_number - 1;
1767       wait:if (ftdi->disconnected > 0) {
1768                 return -ENODEV;
1769         } else if (ftdi->initialized == 0) {
1770                 return -ENODEV;
1771         } else {
1772                 int command_size;
1773                 down(&ftdi->u132_lock);
1774                 command_size = ftdi->command_next - ftdi->command_head;
1775                 if (command_size < COMMAND_SIZE) {
1776                         int remaining_length = urb->transfer_buffer_length -
1777                                 urb->actual_length;
1778                         struct u132_target *target = &ftdi->target[ed];
1779                         struct u132_command *command = &ftdi->command[
1780                                 COMMAND_MASK & ftdi->command_next];
1781                         command->header = 0x83 | (ed << 5);
1782                         if (remaining_length == 0) {
1783                                 command->length = 0x0000;
1784                         } else if (remaining_length > 1024) {
1785                                 command->length = 0x8000 | 1023;
1786                         } else
1787                                 command->length = 0x8000 | (remaining_length -
1788                                         1);
1789                         command->address = (toggle_bits << 6) | (ep_number << 2)
1790                                 | (address << 0);
1791                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1792                                 usb_pipeout(urb->pipe));
1793                         command->follows = 0;
1794                         command->value = 0;
1795                         command->buffer = NULL;
1796                         target->callback = callback;
1797                         target->endp = endp;
1798                         target->urb = urb;
1799                         target->active = 1;
1800                         ftdi->command_next += 1;
1801                         ftdi_elan_kick_command_queue(ftdi);
1802                         up(&ftdi->u132_lock);
1803                         return 0;
1804                 } else {
1805                         up(&ftdi->u132_lock);
1806                         msleep(100);
1807                         goto wait;
1808                 }
1809         }
1810 }
1811
1812 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1813         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1814         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1815         int toggle_bits, int error_count, int condition_code, int repeat_number,
1816          int halted, int skipped, int actual, int non_null))
1817 {
1818         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1819         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1820                 ep_number, toggle_bits, callback);
1821 }
1822
1823
1824 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1825 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1826         void *endp)
1827 {
1828         u8 ed = ed_number - 1;
1829         if (ftdi->disconnected > 0) {
1830                 return -ENODEV;
1831         } else if (ftdi->initialized == 0) {
1832                 return -ENODEV;
1833         } else {
1834                 struct u132_target *target = &ftdi->target[ed];
1835                 down(&ftdi->u132_lock);
1836                 if (target->abandoning > 0) {
1837                         up(&ftdi->u132_lock);
1838                         return 0;
1839                 } else {
1840                         target->abandoning = 1;
1841                       wait_1:if (target->active == 1) {
1842                                 int command_size = ftdi->command_next -
1843                                         ftdi->command_head;
1844                                 if (command_size < COMMAND_SIZE) {
1845                                         struct u132_command *command =
1846                                                 &ftdi->command[COMMAND_MASK &
1847                                                 ftdi->command_next];
1848                                         command->header = 0x80 | (ed << 5) |
1849                                                 0x4;
1850                                         command->length = 0x00;
1851                                         command->address = 0x00;
1852                                         command->width = 0x00;
1853                                         command->follows = 0;
1854                                         command->value = 0;
1855                                         command->buffer = &command->value;
1856                                         ftdi->command_next += 1;
1857                                         ftdi_elan_kick_command_queue(ftdi);
1858                                 } else {
1859                                         up(&ftdi->u132_lock);
1860                                         msleep(100);
1861                                         down(&ftdi->u132_lock);
1862                                         goto wait_1;
1863                                 }
1864                         }
1865                         up(&ftdi->u132_lock);
1866                         return 0;
1867                 }
1868         }
1869 }
1870
1871 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1872         void *endp)
1873 {
1874         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1875         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1876 }
1877
1878
1879 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1880 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1881 {
1882         int retry_on_empty = 10;
1883         int retry_on_timeout = 5;
1884         int retry_on_status = 20;
1885       more:{
1886                 int packet_bytes = 0;
1887                 int retval = usb_bulk_msg(ftdi->udev,
1888                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1889                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1890                         &packet_bytes, msecs_to_jiffies(100));
1891                 if (packet_bytes > 2) {
1892                         char diag[30 *3 + 4];
1893                         char *d = diag;
1894                         int m = (sizeof(diag) - 1) / 3;
1895                         char *b = ftdi->bulk_in_buffer;
1896                         int bytes_read = 0;
1897                         diag[0] = 0;
1898                         while (packet_bytes-- > 0) {
1899                                 char c = *b++;
1900                                 if (bytes_read < m) {
1901                                         d += sprintf(d, " %02X",
1902                                                 0x000000FF & c);
1903                                 } else if (bytes_read > m) {
1904                                 } else
1905                                         d += sprintf(d, " ..");
1906                                 bytes_read += 1;
1907                                 continue;
1908                         }
1909                         goto more;
1910                 } else if (packet_bytes > 1) {
1911                         char s1 = ftdi->bulk_in_buffer[0];
1912                         char s2 = ftdi->bulk_in_buffer[1];
1913                         if (s1 == 0x31 && s2 == 0x60) {
1914                                 return 0;
1915                         } else if (retry_on_status-- > 0) {
1916                                 goto more;
1917                         } else {
1918                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1919                                         "imit reached\n");
1920                                 return -EFAULT;
1921                         }
1922                 } else if (packet_bytes > 0) {
1923                         char b1 = ftdi->bulk_in_buffer[0];
1924                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
1925                                 "TDI = %02X\n", b1);
1926                         if (retry_on_status-- > 0) {
1927                                 goto more;
1928                         } else {
1929                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1930                                         "imit reached\n");
1931                                 return -EFAULT;
1932                         }
1933                 } else if (retval == -ETIMEDOUT) {
1934                         if (retry_on_timeout-- > 0) {
1935                                 goto more;
1936                         } else {
1937                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
1938                                         "t reached\n");
1939                                 return -ENOMEM;
1940                         }
1941                 } else if (retval == 0) {
1942                         if (retry_on_empty-- > 0) {
1943                                 goto more;
1944                         } else {
1945                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
1946                                         "imit reached\n");
1947                                 return -ENOMEM;
1948                         }
1949                 } else {
1950                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1951                         return retval;
1952                 }
1953         }
1954         return -1;
1955 }
1956
1957
1958 /*
1959 * send the long flush sequence
1960 *
1961 */
1962 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1963 {
1964         int retval;
1965         struct urb *urb;
1966         char *buf;
1967         int I = 257;
1968         int i = 0;
1969         urb = usb_alloc_urb(0, GFP_KERNEL);
1970         if (!urb) {
1971                 dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequ"
1972                         "ence\n");
1973                 return -ENOMEM;
1974         }
1975         buf = usb_buffer_alloc(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1976         if (!buf) {
1977                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush seq"
1978                         "uence\n");
1979                 usb_free_urb(urb);
1980                 return -ENOMEM;
1981         }
1982         while (I-- > 0)
1983                 buf[i++] = 0x55;
1984         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1985                 ftdi->bulk_out_endpointAddr), buf, i,
1986                 ftdi_elan_write_bulk_callback, ftdi);
1987         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1988         retval = usb_submit_urb(urb, GFP_KERNEL);
1989         if (retval) {
1990                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
1991                         "flush sequence\n");
1992                 usb_buffer_free(ftdi->udev, i, buf, urb->transfer_dma);
1993                 usb_free_urb(urb);
1994                 return -ENOMEM;
1995         }
1996         usb_free_urb(urb);
1997         return 0;
1998 }
1999
2000
2001 /*
2002 * send the reset sequence
2003 *
2004 */
2005 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
2006 {
2007         int retval;
2008         struct urb *urb;
2009         char *buf;
2010         int I = 4;
2011         int i = 0;
2012         urb = usb_alloc_urb(0, GFP_KERNEL);
2013         if (!urb) {
2014                 dev_err(&ftdi->udev->dev, "could not get a urb for the reset se"
2015                         "quence\n");
2016                 return -ENOMEM;
2017         }
2018         buf = usb_buffer_alloc(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
2019         if (!buf) {
2020                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset"
2021                         " sequence\n");
2022                 usb_free_urb(urb);
2023                 return -ENOMEM;
2024         }
2025         buf[i++] = 0x55;
2026         buf[i++] = 0xAA;
2027         buf[i++] = 0x5A;
2028         buf[i++] = 0xA5;
2029         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2030                 ftdi->bulk_out_endpointAddr), buf, i,
2031                 ftdi_elan_write_bulk_callback, ftdi);
2032         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2033         retval = usb_submit_urb(urb, GFP_KERNEL);
2034         if (retval) {
2035                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
2036                         "reset sequence\n");
2037                 usb_buffer_free(ftdi->udev, i, buf, urb->transfer_dma);
2038                 usb_free_urb(urb);
2039                 return -ENOMEM;
2040         }
2041         usb_free_urb(urb);
2042         return 0;
2043 }
2044
2045 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2046 {
2047         int retval;
2048         int long_stop = 10;
2049         int retry_on_timeout = 5;
2050         int retry_on_empty = 10;
2051         int err_count = 0;
2052         retval = ftdi_elan_flush_input_fifo(ftdi);
2053         if (retval)
2054                 return retval;
2055         ftdi->bulk_in_left = 0;
2056         ftdi->bulk_in_last = -1;
2057         while (long_stop-- > 0) {
2058                 int read_stop;
2059                 int read_stuck;
2060                 retval = ftdi_elan_synchronize_flush(ftdi);
2061                 if (retval)
2062                         return retval;
2063                 retval = ftdi_elan_flush_input_fifo(ftdi);
2064                 if (retval)
2065                         return retval;
2066               reset:retval = ftdi_elan_synchronize_reset(ftdi);
2067                 if (retval)
2068                         return retval;
2069                 read_stop = 100;
2070                 read_stuck = 10;
2071               read:{
2072                         int packet_bytes = 0;
2073                         retval = usb_bulk_msg(ftdi->udev,
2074                                 usb_rcvbulkpipe(ftdi->udev,
2075                                 ftdi->bulk_in_endpointAddr),
2076                                 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2077                                 &packet_bytes, msecs_to_jiffies(500));
2078                         if (packet_bytes > 2) {
2079                                 char diag[30 *3 + 4];
2080                                 char *d = diag;
2081                                 int m = (sizeof(diag) - 1) / 3;
2082                                 char *b = ftdi->bulk_in_buffer;
2083                                 int bytes_read = 0;
2084                                 unsigned char c = 0;
2085                                 diag[0] = 0;
2086                                 while (packet_bytes-- > 0) {
2087                                         c = *b++;
2088                                         if (bytes_read < m) {
2089                                                 d += sprintf(d, " %02X", c);
2090                                         } else if (bytes_read > m) {
2091                                         } else
2092                                                 d += sprintf(d, " ..");
2093                                         bytes_read += 1;
2094                                         continue;
2095                                 }
2096                                 if (c == 0x7E) {
2097                                         return 0;
2098                                 } else {
2099                                         if (c == 0x55) {
2100                                                 goto read;
2101                                         } else if (read_stop-- > 0) {
2102                                                 goto read;
2103                                         } else {
2104                                                 dev_err(&ftdi->udev->dev, "retr"
2105                                                         "y limit reached\n");
2106                                                 continue;
2107                                         }
2108                                 }
2109                         } else if (packet_bytes > 1) {
2110                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2111                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2112                                 if (s1 == 0x31 && s2 == 0x00) {
2113                                         if (read_stuck-- > 0) {
2114                                                 goto read;
2115                                         } else
2116                                                 goto reset;
2117                                 } else if (s1 == 0x31 && s2 == 0x60) {
2118                                         if (read_stop-- > 0) {
2119                                                 goto read;
2120                                         } else {
2121                                                 dev_err(&ftdi->udev->dev, "retr"
2122                                                         "y limit reached\n");
2123                                                 continue;
2124                                         }
2125                                 } else {
2126                                         if (read_stop-- > 0) {
2127                                                 goto read;
2128                                         } else {
2129                                                 dev_err(&ftdi->udev->dev, "retr"
2130                                                         "y limit reached\n");
2131                                                 continue;
2132                                         }
2133                                 }
2134                         } else if (packet_bytes > 0) {
2135                                 if (read_stop-- > 0) {
2136                                         goto read;
2137                                 } else {
2138                                         dev_err(&ftdi->udev->dev, "retry limit "
2139                                                 "reached\n");
2140                                         continue;
2141                                 }
2142                         } else if (retval == -ETIMEDOUT) {
2143                                 if (retry_on_timeout-- > 0) {
2144                                         goto read;
2145                                 } else {
2146                                         dev_err(&ftdi->udev->dev, "TIMED OUT re"
2147                                                 "try limit reached\n");
2148                                         continue;
2149                                 }
2150                         } else if (retval == 0) {
2151                                 if (retry_on_empty-- > 0) {
2152                                         goto read;
2153                                 } else {
2154                                         dev_err(&ftdi->udev->dev, "empty packet"
2155                                                 " retry limit reached\n");
2156                                         continue;
2157                                 }
2158                         } else {
2159                                 err_count += 1;
2160                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2161                                         retval);
2162                                 if (read_stop-- > 0) {
2163                                         goto read;
2164                                 } else {
2165                                         dev_err(&ftdi->udev->dev, "retry limit "
2166                                                 "reached\n");
2167                                         continue;
2168                                 }
2169                         }
2170                 }
2171         }
2172         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2173         return -EFAULT;
2174 }
2175
2176 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2177 {
2178         int retry_on_empty = 10;
2179         int retry_on_timeout = 5;
2180         int retry_on_status = 50;
2181       more:{
2182                 int packet_bytes = 0;
2183                 int retval = usb_bulk_msg(ftdi->udev,
2184                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2185                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2186                         &packet_bytes, msecs_to_jiffies(1000));
2187                 if (packet_bytes > 2) {
2188                         char diag[30 *3 + 4];
2189                         char *d = diag;
2190                         int m = (sizeof(diag) - 1) / 3;
2191                         char *b = ftdi->bulk_in_buffer;
2192                         int bytes_read = 0;
2193                         diag[0] = 0;
2194                         while (packet_bytes-- > 0) {
2195                                 char c = *b++;
2196                                 if (bytes_read < m) {
2197                                         d += sprintf(d, " %02X",
2198                                                 0x000000FF & c);
2199                                 } else if (bytes_read > m) {
2200                                 } else
2201                                         d += sprintf(d, " ..");
2202                                 bytes_read += 1;
2203                                 continue;
2204                         }
2205                         goto more;
2206                 } else if (packet_bytes > 1) {
2207                         char s1 = ftdi->bulk_in_buffer[0];
2208                         char s2 = ftdi->bulk_in_buffer[1];
2209                         if (s1 == 0x31 && s2 == 0x60) {
2210                                 return 0;
2211                         } else if (retry_on_status-- > 0) {
2212                                 msleep(5);
2213                                 goto more;
2214                         } else
2215                                 return -EFAULT;
2216                 } else if (packet_bytes > 0) {
2217                         char b1 = ftdi->bulk_in_buffer[0];
2218                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
2219                                 "TDI = %02X\n", b1);
2220                         if (retry_on_status-- > 0) {
2221                                 msleep(5);
2222                                 goto more;
2223                         } else {
2224                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
2225                                         "imit reached\n");
2226                                 return -EFAULT;
2227                         }
2228                 } else if (retval == -ETIMEDOUT) {
2229                         if (retry_on_timeout-- > 0) {
2230                                 goto more;
2231                         } else {
2232                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
2233                                         "t reached\n");
2234                                 return -ENOMEM;
2235                         }
2236                 } else if (retval == 0) {
2237                         if (retry_on_empty-- > 0) {
2238                                 goto more;
2239                         } else {
2240                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
2241                                         "imit reached\n");
2242                                 return -ENOMEM;
2243                         }
2244                 } else {
2245                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2246                         return -ENOMEM;
2247                 }
2248         }
2249         return -1;
2250 }
2251
2252 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2253 {
2254         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2255         if (UxxxStatus)
2256                 return UxxxStatus;
2257         if (ftdi->controlreg & 0x00400000) {
2258                 if (ftdi->card_ejected) {
2259                 } else {
2260                         ftdi->card_ejected = 1;
2261                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = "
2262                                 "%08X\n", ftdi->controlreg);
2263                 }
2264                 return -ENODEV;
2265         } else {
2266                 u8 fn = ftdi->function - 1;
2267                 int activePCIfn = fn << 8;
2268                 u32 pcidata;
2269                 u32 pciVID;
2270                 u32 pciPID;
2271                 int reg = 0;
2272                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2273                         &pcidata);
2274                 if (UxxxStatus)
2275                         return UxxxStatus;
2276                 pciVID = pcidata & 0xFFFF;
2277                 pciPID = (pcidata >> 16) & 0xFFFF;
2278                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2279                         ftdi->platform_data.device) {
2280                         return 0;
2281                 } else {
2282                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X devi"
2283                                 "ce=%04X pciPID=%04X\n",
2284                                 ftdi->platform_data.vendor, pciVID,
2285                                 ftdi->platform_data.device, pciPID);
2286                         return -ENODEV;
2287                 }
2288         }
2289 }
2290
2291 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2292 {
2293         u32 latence_timer;
2294         u32 controlreg;
2295         int UxxxStatus;
2296         u32 pcidata;
2297         int reg = 0;
2298         int foundOHCI = 0;
2299         u8 fn;
2300         int activePCIfn = 0;
2301         u32 pciVID = 0;
2302         u32 pciPID = 0;
2303         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2304         if (UxxxStatus)
2305                 return UxxxStatus;
2306         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2307         if (UxxxStatus)
2308                 return UxxxStatus;
2309         msleep(750);
2310         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2311         if (UxxxStatus)
2312                 return UxxxStatus;
2313         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2314         if (UxxxStatus)
2315                 return UxxxStatus;
2316         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2317         if (UxxxStatus)
2318                 return UxxxStatus;
2319         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2320         if (UxxxStatus)
2321                 return UxxxStatus;
2322         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2323         if (UxxxStatus)
2324                 return UxxxStatus;
2325         msleep(250);
2326         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2327         if (UxxxStatus)
2328                 return UxxxStatus;
2329         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2330         if (UxxxStatus)
2331                 return UxxxStatus;
2332         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2333         if (UxxxStatus)
2334                 return UxxxStatus;
2335         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2336         if (UxxxStatus)
2337                 return UxxxStatus;
2338         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2339         if (UxxxStatus)
2340                 return UxxxStatus;
2341         msleep(1000);
2342         for (fn = 0; (fn < 4) && (!foundOHCI); fn++) {
2343                 activePCIfn = fn << 8;
2344                 ftdi->function = fn + 1;
2345                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2346                         &pcidata);
2347                 if (UxxxStatus)
2348                         return UxxxStatus;
2349                 pciVID = pcidata & 0xFFFF;
2350                 pciPID = (pcidata >> 16) & 0xFFFF;
2351                 if ((pciVID == 0x1045) && (pciPID == 0xc861)) {
2352                         foundOHCI = 1;
2353                 } else if ((pciVID == 0x1033) && (pciPID == 0x0035)) {
2354                         foundOHCI = 1;
2355                 } else if ((pciVID == 0x10b9) && (pciPID == 0x5237)) {
2356                         foundOHCI = 1;
2357                 } else if ((pciVID == 0x11c1) && (pciPID == 0x5802)) {
2358                         foundOHCI = 1;
2359                 } else if ((pciVID == 0x11AB) && (pciPID == 0x1FA6)) {
2360                 }
2361         }
2362         if (foundOHCI == 0) {
2363                 return -ENXIO;
2364         }
2365         ftdi->platform_data.vendor = pciVID;
2366         ftdi->platform_data.device = pciPID;
2367         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2368         if (UxxxStatus)
2369                 return UxxxStatus;
2370         reg = 16;
2371         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2372                 0xFFFFFFFF);
2373         if (UxxxStatus)
2374                 return UxxxStatus;
2375         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2376                 &pcidata);
2377         if (UxxxStatus)
2378                 return UxxxStatus;
2379         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2380                 0xF0000000);
2381         if (UxxxStatus)
2382                 return UxxxStatus;
2383         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2384                 &pcidata);
2385         if (UxxxStatus)
2386                 return UxxxStatus;
2387         reg = 12;
2388         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2389                 &latence_timer);
2390         if (UxxxStatus)
2391                 return UxxxStatus;
2392         latence_timer &= 0xFFFF00FF;
2393         latence_timer |= 0x00001600;
2394         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2395                 latence_timer);
2396         if (UxxxStatus)
2397                 return UxxxStatus;
2398         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2399                 &pcidata);
2400         if (UxxxStatus)
2401                 return UxxxStatus;
2402         reg = 4;
2403         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2404                 0x06);
2405         if (UxxxStatus)
2406                 return UxxxStatus;
2407         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2408                 &pcidata);
2409         if (UxxxStatus)
2410                 return UxxxStatus;
2411         return 0;
2412 }
2413
2414 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2415 {
2416         u32 pcidata;
2417         int U132Status;
2418         int reg;
2419         int reset_repeat = 0;
2420       do_reset:reg = 8;
2421         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x0e, 0x01);
2422         if (U132Status)
2423                 return U132Status;
2424       reset_check:{
2425                 U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2426                 if (U132Status)
2427                         return U132Status;
2428                 if (pcidata & 1) {
2429                         msleep(500);
2430                         if (reset_repeat++ > 100) {
2431                                 reset_repeat = 0;
2432                                 goto do_reset;
2433                         } else
2434                                 goto reset_check;
2435                 }
2436         }
2437         goto dump_regs;
2438         msleep(500);
2439         reg = 0x28;
2440         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x11000000);
2441         if (U132Status)
2442                 return U132Status;
2443         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2444         if (U132Status)
2445                 return U132Status;
2446         reg = 0x40;
2447         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x2edf);
2448         if (U132Status)
2449                 return U132Status;
2450         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2451         if (U132Status)
2452                 return U132Status;
2453         reg = 0x34;
2454         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x2edf2edf);
2455         if (U132Status)
2456                 return U132Status;
2457         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2458         if (U132Status)
2459                 return U132Status;
2460         reg = 4;
2461         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0xA0);
2462         if (U132Status)
2463                 return U132Status;
2464         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2465         if (U132Status)
2466                 return U132Status;
2467         msleep(250);
2468         reg = 8;
2469         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x0e, 0x04);
2470         if (U132Status)
2471                 return U132Status;
2472         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2473         if (U132Status)
2474                 return U132Status;
2475         reg = 0x28;
2476         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2477         if (U132Status)
2478                 return U132Status;
2479         reg = 8;
2480         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2481         if (U132Status)
2482                 return U132Status;
2483         reg = 0x48;
2484         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x00001200);
2485         if (U132Status)
2486                 return U132Status;
2487         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2488         if (U132Status)
2489                 return U132Status;
2490         reg = 0x54;
2491         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2492         if (U132Status)
2493                 return U132Status;
2494         reg = 0x58;
2495         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2496         if (U132Status)
2497                 return U132Status;
2498         reg = 0x34;
2499         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x28002edf);
2500         if (U132Status)
2501                 return U132Status;
2502         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2503         if (U132Status)
2504                 return U132Status;
2505         msleep(100);
2506         reg = 0x50;
2507         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x10000);
2508         if (U132Status)
2509                 return U132Status;
2510         reg = 0x54;
2511       power_check:U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2512         if (U132Status)
2513                 return U132Status;
2514         if (!(pcidata & 1)) {
2515                 msleep(500);
2516                 goto power_check;
2517         }
2518         msleep(3000);
2519         reg = 0x54;
2520         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2521         if (U132Status)
2522                 return U132Status;
2523         reg = 0x58;
2524         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2525         if (U132Status)
2526                 return U132Status;
2527         reg = 0x54;
2528         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x02);
2529         if (U132Status)
2530                 return U132Status;
2531         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2532         if (U132Status)
2533                 return U132Status;
2534         reg = 0x54;
2535         U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x10);
2536         if (U132Status)
2537                 return U132Status;
2538         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2539         if (U132Status)
2540                 return U132Status;
2541         msleep(750);
2542         reg = 0x54;
2543         if (0) {
2544                 U132Status = ftdi_elan_write_pcimem(ftdi, reg, 0x00, 0x02);
2545                 if (U132Status)
2546                         return U132Status;
2547         }
2548         if (0) {
2549                 U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2550                 if (U132Status)
2551                         return U132Status;
2552         }
2553         reg = 0x54;
2554         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2555         if (U132Status)
2556                 return U132Status;
2557         reg = 0x58;
2558         U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2559         if (U132Status)
2560                 return U132Status;
2561       dump_regs:for (reg = 0; reg <= 0x54; reg += 4) {
2562                 U132Status = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2563                 if (U132Status)
2564                         return U132Status;
2565         }
2566         return 0;
2567 }
2568
2569
2570 /*
2571 * we use only the first bulk-in and bulk-out endpoints
2572 */
2573 static int ftdi_elan_probe(struct usb_interface *interface,
2574         const struct usb_device_id *id)
2575 {
2576         struct usb_host_interface *iface_desc;
2577         struct usb_endpoint_descriptor *endpoint;
2578         size_t buffer_size;
2579         int i;
2580         int retval = -ENOMEM;
2581         struct usb_ftdi *ftdi = kmalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2582         if (ftdi == NULL) {
2583                 printk(KERN_ERR "Out of memory\n");
2584                 return -ENOMEM;
2585         }
2586         memset(ftdi, 0x00, sizeof(struct usb_ftdi));
2587         down(&ftdi_module_lock);
2588         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2589         ftdi->sequence_num = ++ftdi_instances;
2590         up(&ftdi_module_lock);
2591         ftdi_elan_init_kref(ftdi);
2592         init_MUTEX(&ftdi->sw_lock);
2593         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2594         ftdi->interface = interface;
2595         init_MUTEX(&ftdi->u132_lock);
2596         ftdi->expected = 4;
2597         iface_desc = interface->cur_altsetting;
2598         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2599                 endpoint = &iface_desc->endpoint[i].desc;
2600                 if (!ftdi->bulk_in_endpointAddr &&
2601                     usb_endpoint_is_bulk_in(endpoint)) {
2602                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2603                         ftdi->bulk_in_size = buffer_size;
2604                         ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2605                         ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2606                         if (!ftdi->bulk_in_buffer) {
2607                                 dev_err(&ftdi->udev->dev, "Could not allocate b"
2608                                         "ulk_in_buffer\n");
2609                                 retval = -ENOMEM;
2610                                 goto error;
2611                         }
2612                 }
2613                 if (!ftdi->bulk_out_endpointAddr &&
2614                     usb_endpoint_is_bulk_out(endpoint)) {
2615                         ftdi->bulk_out_endpointAddr =
2616                                 endpoint->bEndpointAddress;
2617                 }
2618         }
2619         if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2620                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk"
2621                         "-out endpoints\n");
2622                 retval = -ENODEV;
2623                 goto error;
2624         }
2625         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2626                 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2627                 ftdi->bulk_out_endpointAddr);
2628         usb_set_intfdata(interface, ftdi);
2629         if (iface_desc->desc.bInterfaceNumber == 0 &&
2630                 ftdi->bulk_in_endpointAddr == 0x81 &&
2631                 ftdi->bulk_out_endpointAddr == 0x02) {
2632                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2633                 if (retval) {
2634                         dev_err(&ftdi->udev->dev, "Not able to get a minor for "
2635                                 "this device.\n");
2636                         usb_set_intfdata(interface, NULL);
2637                         retval = -ENOMEM;
2638                         goto error;
2639                 } else {
2640                         ftdi->class = &ftdi_elan_jtag_class;
2641                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface "
2642                                 "%d now attached to ftdi%d\n", ftdi,
2643                                 iface_desc->desc.bInterfaceNumber,
2644                                 interface->minor);
2645                         return 0;
2646                 }
2647         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2648                 ftdi->bulk_in_endpointAddr == 0x83 &&
2649                 ftdi->bulk_out_endpointAddr == 0x04) {
2650                 ftdi->class = NULL;
2651                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now a"
2652                         "ctivated\n", ftdi, iface_desc->desc.bInterfaceNumber);
2653                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2654                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2655                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2656                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2657                 return 0;
2658         } else {
2659                 dev_err(&ftdi->udev->dev,
2660                         "Could not find ELAN's U132 device\n");
2661                 retval = -ENODEV;
2662                 goto error;
2663         }
2664       error:if (ftdi) {
2665                 ftdi_elan_put_kref(ftdi);
2666         }
2667         return retval;
2668 }
2669
2670 static void ftdi_elan_disconnect(struct usb_interface *interface)
2671 {
2672         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2673         ftdi->disconnected += 1;
2674         if (ftdi->class) {
2675                 int minor = interface->minor;
2676                 struct usb_class_driver *class = ftdi->class;
2677                 usb_set_intfdata(interface, NULL);
2678                 usb_deregister_dev(interface, class);
2679                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on min"
2680                         "or %d now disconnected\n", minor);
2681         } else {
2682                 ftdi_status_cancel_work(ftdi);
2683                 ftdi_command_cancel_work(ftdi);
2684                 ftdi_response_cancel_work(ftdi);
2685                 ftdi_elan_abandon_completions(ftdi);
2686                 ftdi_elan_abandon_targets(ftdi);
2687                 if (ftdi->registered) {
2688                         platform_device_unregister(&ftdi->platform_dev);
2689                         ftdi->synchronized = 0;
2690                         ftdi->enumerated = 0;
2691                         ftdi->registered = 0;
2692                 }
2693                 flush_workqueue(status_queue);
2694                 flush_workqueue(command_queue);
2695                 flush_workqueue(respond_queue);
2696                 ftdi->disconnected += 1;
2697                 usb_set_intfdata(interface, NULL);
2698                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller inter"
2699                         "face now disconnected\n");
2700         }
2701         ftdi_elan_put_kref(ftdi);
2702 }
2703
2704 static struct usb_driver ftdi_elan_driver = {
2705         .name = "ftdi-elan",
2706         .probe = ftdi_elan_probe,
2707         .disconnect = ftdi_elan_disconnect,
2708         .id_table = ftdi_elan_table,
2709 };
2710 static int __init ftdi_elan_init(void)
2711 {
2712         int result;
2713         printk(KERN_INFO "driver %s built at %s on %s\n", ftdi_elan_driver.name,
2714                  __TIME__, __DATE__);
2715         init_MUTEX(&ftdi_module_lock);
2716         INIT_LIST_HEAD(&ftdi_static_list);
2717         status_queue = create_singlethread_workqueue("ftdi-status-control");
2718         command_queue = create_singlethread_workqueue("ftdi-command-engine");
2719         respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2720         result = usb_register(&ftdi_elan_driver);
2721         if (result)
2722                 printk(KERN_ERR "usb_register failed. Error number %d\n",
2723                         result);
2724         return result;
2725 }
2726
2727 static void __exit ftdi_elan_exit(void)
2728 {
2729         struct usb_ftdi *ftdi;
2730         struct usb_ftdi *temp;
2731         usb_deregister(&ftdi_elan_driver);
2732         printk(KERN_INFO "ftdi_u132 driver deregistered\n");
2733         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2734                 ftdi_status_cancel_work(ftdi);
2735                 ftdi_command_cancel_work(ftdi);
2736                 ftdi_response_cancel_work(ftdi);
2737         } flush_workqueue(status_queue);
2738         destroy_workqueue(status_queue);
2739         status_queue = NULL;
2740         flush_workqueue(command_queue);
2741         destroy_workqueue(command_queue);
2742         command_queue = NULL;
2743         flush_workqueue(respond_queue);
2744         destroy_workqueue(respond_queue);
2745         respond_queue = NULL;
2746 }
2747
2748
2749 module_init(ftdi_elan_init);
2750 module_exit(ftdi_elan_exit);