drivers/usb/misc/ftdi-elan.c

   1 /*
   2  * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
   3  *
   4  * Copyright(C) 2006 Elan Digital Systems Limited
   5  * http://www.elandigitalsystems.com
   6  *
   7  * Author and Maintainer - Tony Olech - Elan Digital Systems
   8  * tony.olech@elandigitalsystems.com
   9  *
  10  * This program is free software;you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation, version 2.
  13  *
  14  *
  15  * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
  16  * based on various USB client drivers in the 2.6.15 linux kernel
  17  * with constant reference to the 3rd Edition of Linux Device Drivers
  18  * published by O'Reilly
  19  *
  20  * The U132 adapter is a USB to CardBus adapter specifically designed
  21  * for PC cards that contain an OHCI host controller. Typical PC cards
  22  * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
  23  *
  24  * The U132 adapter will *NOT *work with PC cards that do not contain
  25  * an OHCI controller. A simple way to test whether a PC card has an
  26  * OHCI controller as an interface is to insert the PC card directly
  27  * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
  28  * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
  29  * then there is a good chance that the U132 adapter will support the
  30  * PC card.(you also need the specific client driver for the PC card)
  31  *
  32  * Please inform the Author and Maintainer about any PC cards that
  33  * contain OHCI Host Controller and work when directly connected to
  34  * an embedded CardBus slot but do not work when they are connected
  35  * via an ELAN U132 adapter.
  36  *
  37  */
  38
  39 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  40
  41 #include <linux/kernel.h>
  42 #include <linux/errno.h>
  43 #include <linux/init.h>
  44 #include <linux/list.h>
  45 #include <linux/ioctl.h>
  46 #include <linux/pci_ids.h>
  47 #include <linux/slab.h>
  48 #include <linux/module.h>
  49 #include <linux/kref.h>
  50 #include <linux/mutex.h>
  51 #include <linux/uaccess.h>
  52 #include <linux/usb.h>
  53 #include <linux/workqueue.h>
  54 #include <linux/platform_device.h>
  55 MODULE_AUTHOR("Tony Olech");
  56 MODULE_DESCRIPTION("FTDI ELAN driver");
  57 MODULE_LICENSE("GPL");
  58 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
  59 static bool distrust_firmware = 1;
  60 module_param(distrust_firmware, bool, 0);
  61 MODULE_PARM_DESC(distrust_firmware,
  62                  "true to distrust firmware power/overcurrent setup");
  63 extern struct platform_driver u132_platform_driver;
  64 /*
  65  * ftdi_module_lock exists to protect access to global variables
  66  *
  67  */
  68 static struct mutex ftdi_module_lock;
  69 static int ftdi_instances = 0;
  70 static struct list_head ftdi_static_list;
  71 /*
  72  * end of the global variables protected by ftdi_module_lock
  73  */
  74 #include "usb_u132.h"
  75 #include <asm/io.h>
  76 #include <linux/usb/hcd.h>
  77
  78 /* FIXME ohci.h is ONLY for internal use by the OHCI driver.
  79  * If you're going to try stuff like this, you need to split
  80  * out shareable stuff (register declarations?) into its own
  81  * file, maybe name <linux/usb/ohci.h>
  82  */
  83
  84 #include "../host/ohci.h"
  85 /* Define these values to match your devices*/
  86 #define USB_FTDI_ELAN_VENDOR_ID 0x0403
  87 #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
  88 /* table of devices that work with this driver*/
  89 static const struct usb_device_id ftdi_elan_table[] = {
  90         {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
  91         { /* Terminating entry */ }
  92 };
  93
  94 MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
  95 /* only the jtag(firmware upgrade device) interface requires
  96  * a device file and corresponding minor number, but the
  97  * interface is created unconditionally - I suppose it could
  98  * be configured or not according to a module parameter.
  99  * But since we(now) require one interface per device,
 100  * and since it unlikely that a normal installation would
 101  * require more than a couple of elan-ftdi devices, 8 seems
 102  * like a reasonable limit to have here, and if someone
 103  * really requires more than 8 devices, then they can frig the
 104  * code and recompile
 105  */
 106 #define USB_FTDI_ELAN_MINOR_BASE 192
 107 #define COMMAND_BITS 5
 108 #define COMMAND_SIZE (1<<COMMAND_BITS)
 109 #define COMMAND_MASK (COMMAND_SIZE-1)
 110 struct u132_command {
 111         u8 header;
 112         u16 length;
 113         u8 address;
 114         u8 width;
 115         u32 value;
 116         int follows;
 117         void *buffer;
 118 };
 119 #define RESPOND_BITS 5
 120 #define RESPOND_SIZE (1<<RESPOND_BITS)
 121 #define RESPOND_MASK (RESPOND_SIZE-1)
 122 struct u132_respond {
 123         u8 header;
 124         u8 address;
 125         u32 *value;
 126         int *result;
 127         struct completion wait_completion;
 128 };
 129 struct u132_target {
 130         void *endp;
 131         struct urb *urb;
 132         int toggle_bits;
 133         int error_count;
 134         int condition_code;
 135         int repeat_number;
 136         int halted;
 137         int skipped;
 138         int actual;
 139         int non_null;
 140         int active;
 141         int abandoning;
 142         void (*callback)(void *endp, struct urb *urb, u8 *buf, int len,
 143                          int toggle_bits, int error_count, int condition_code,
 144                          int repeat_number, int halted, int skipped, int actual,
 145                          int non_null);
 146 };
 147 /* Structure to hold all of our device specific stuff*/
 148 struct usb_ftdi {
 149         struct list_head ftdi_list;
 150         struct mutex u132_lock;
 151         int command_next;
 152         int command_head;
 153         struct u132_command command[COMMAND_SIZE];
 154         int respond_next;
 155         int respond_head;
 156         struct u132_respond respond[RESPOND_SIZE];
 157         struct u132_target target[4];
 158         char device_name[16];
 159         unsigned synchronized:1;
 160         unsigned enumerated:1;
 161         unsigned registered:1;
 162         unsigned initialized:1;
 163         unsigned card_ejected:1;
 164         int function;
 165         int sequence_num;
 166         int disconnected;
 167         int gone_away;
 168         int stuck_status;
 169         int status_queue_delay;
 170         struct semaphore sw_lock;
 171         struct usb_device *udev;
 172         struct usb_interface *interface;
 173         struct usb_class_driver *class;
 174         struct delayed_work status_work;
 175         struct delayed_work command_work;
 176         struct delayed_work respond_work;
 177         struct u132_platform_data platform_data;
 178         struct resource resources[0];
 179         struct platform_device platform_dev;
 180         unsigned char *bulk_in_buffer;
 181         size_t bulk_in_size;
 182         size_t bulk_in_last;
 183         size_t bulk_in_left;
 184         __u8 bulk_in_endpointAddr;
 185         __u8 bulk_out_endpointAddr;
 186         struct kref kref;
 187         u32 controlreg;
 188         u8 response[4 + 1024];
 189         int expected;
 190         int received;
 191         int ed_found;
 192 };
 193 #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
 194 #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
 195                                                     platform_dev)
 196 static struct usb_driver ftdi_elan_driver;
 197 static void ftdi_elan_delete(struct kref *kref)
 198 {
 199         struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
 200         dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
 201         usb_put_dev(ftdi->udev);
 202         ftdi->disconnected += 1;
 203         mutex_lock(&ftdi_module_lock);
 204         list_del_init(&ftdi->ftdi_list);
 205         ftdi_instances -= 1;
 206         mutex_unlock(&ftdi_module_lock);
 207         kfree(ftdi->bulk_in_buffer);
 208         ftdi->bulk_in_buffer = NULL;
 209 }
 210
 211 static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
 212 {
 213         kref_put(&ftdi->kref, ftdi_elan_delete);
 214 }
 215
 216 static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
 217 {
 218         kref_get(&ftdi->kref);
 219 }
 220
 221 static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
 222 {
 223         kref_init(&ftdi->kref);
 224 }
 225
 226 static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 227 {
 228         if (!schedule_delayed_work(&ftdi->status_work, delta))
 229                 kref_put(&ftdi->kref, ftdi_elan_delete);
 230 }
 231
 232 static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 233 {
 234         if (schedule_delayed_work(&ftdi->status_work, delta))
 235                 kref_get(&ftdi->kref);
 236 }
 237
 238 static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
 239 {
 240         if (cancel_delayed_work_sync(&ftdi->status_work))
 241                 kref_put(&ftdi->kref, ftdi_elan_delete);
 242 }
 243
 244 static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 245 {
 246         if (!schedule_delayed_work(&ftdi->command_work, delta))
 247                 kref_put(&ftdi->kref, ftdi_elan_delete);
 248 }
 249
 250 static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 251 {
 252         if (schedule_delayed_work(&ftdi->command_work, delta))
 253                 kref_get(&ftdi->kref);
 254 }
 255
 256 static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
 257 {
 258         if (cancel_delayed_work_sync(&ftdi->command_work))
 259                 kref_put(&ftdi->kref, ftdi_elan_delete);
 260 }
 261
 262 static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
 263                                        unsigned int delta)
 264 {
 265         if (!schedule_delayed_work(&ftdi->respond_work, delta))
 266                 kref_put(&ftdi->kref, ftdi_elan_delete);
 267 }
 268
 269 static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 270 {
 271         if (schedule_delayed_work(&ftdi->respond_work, delta))
 272                 kref_get(&ftdi->kref);
 273 }
 274
 275 static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
 276 {
 277         if (cancel_delayed_work_sync(&ftdi->respond_work))
 278                 kref_put(&ftdi->kref, ftdi_elan_delete);
 279 }
 280
 281 void ftdi_elan_gone_away(struct platform_device *pdev)
 282 {
 283         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
 284         ftdi->gone_away += 1;
 285         ftdi_elan_put_kref(ftdi);
 286 }
 287
 288
 289 EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
 290 static void ftdi_release_platform_dev(struct device *dev)
 291 {
 292         dev->parent = NULL;
 293 }
 294
 295 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 296                                   struct u132_target *target, u8 *buffer, int length);
 297 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
 298 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
 299 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
 300 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
 301 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
 302 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
 303 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
 304 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
 305 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
 306 static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
 307 {
 308         if (ftdi->platform_dev.dev.parent)
 309                 return -EBUSY;
 310
 311         ftdi_elan_get_kref(ftdi);
 312         ftdi->platform_data.potpg = 100;
 313         ftdi->platform_data.reset = NULL;
 314         ftdi->platform_dev.id = ftdi->sequence_num;
 315         ftdi->platform_dev.resource = ftdi->resources;
 316         ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
 317         ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
 318         ftdi->platform_dev.dev.parent = NULL;
 319         ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
 320         ftdi->platform_dev.dev.dma_mask = NULL;
 321         snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
 322         ftdi->platform_dev.name = ftdi->device_name;
 323         dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
 324         request_module("u132_hcd");
 325         dev_info(&ftdi->udev->dev, "registering '%s'\n",
 326                  ftdi->platform_dev.name);
 327
 328         return platform_device_register(&ftdi->platform_dev);
 329 }
 330
 331 static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
 332 {
 333         mutex_lock(&ftdi->u132_lock);
 334         while (ftdi->respond_next > ftdi->respond_head) {
 335                 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
 336                                                               ftdi->respond_head++];
 337                 *respond->result = -ESHUTDOWN;
 338                 *respond->value = 0;
 339                 complete(&respond->wait_completion);
 340         } mutex_unlock(&ftdi->u132_lock);
 341 }
 342
 343 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
 344 {
 345         int ed_number = 4;
 346         mutex_lock(&ftdi->u132_lock);
 347         while (ed_number-- > 0) {
 348                 struct u132_target *target = &ftdi->target[ed_number];
 349                 if (target->active == 1) {
 350                         target->condition_code = TD_DEVNOTRESP;
 351                         mutex_unlock(&ftdi->u132_lock);
 352                         ftdi_elan_do_callback(ftdi, target, NULL, 0);
 353                         mutex_lock(&ftdi->u132_lock);
 354                 }
 355         }
 356         ftdi->received = 0;
 357         ftdi->expected = 4;
 358         ftdi->ed_found = 0;
 359         mutex_unlock(&ftdi->u132_lock);
 360 }
 361
 362 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
 363 {
 364         int ed_number = 4;
 365         mutex_lock(&ftdi->u132_lock);
 366         while (ed_number-- > 0) {
 367                 struct u132_target *target = &ftdi->target[ed_number];
 368                 target->abandoning = 1;
 369         wait_1:if (target->active == 1) {
 370                         int command_size = ftdi->command_next -
 371                                 ftdi->command_head;
 372                         if (command_size < COMMAND_SIZE) {
 373                                 struct u132_command *command = &ftdi->command[
 374                                         COMMAND_MASK & ftdi->command_next];
 375                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 376                                 command->length = 0x00;
 377                                 command->address = 0x00;
 378                                 command->width = 0x00;
 379                                 command->follows = 0;
 380                                 command->value = 0;
 381                                 command->buffer = &command->value;
 382                                 ftdi->command_next += 1;
 383                                 ftdi_elan_kick_command_queue(ftdi);
 384                         } else {
 385                                 mutex_unlock(&ftdi->u132_lock);
 386                                 msleep(100);
 387                                 mutex_lock(&ftdi->u132_lock);
 388                                 goto wait_1;
 389                         }
 390                 }
 391         wait_2:if (target->active == 1) {
 392                         int command_size = ftdi->command_next -
 393                                 ftdi->command_head;
 394                         if (command_size < COMMAND_SIZE) {
 395                                 struct u132_command *command = &ftdi->command[
 396                                         COMMAND_MASK & ftdi->command_next];
 397                                 command->header = 0x90 | (ed_number << 5);
 398                                 command->length = 0x00;
 399                                 command->address = 0x00;
 400                                 command->width = 0x00;
 401                                 command->follows = 0;
 402                                 command->value = 0;
 403                                 command->buffer = &command->value;
 404                                 ftdi->command_next += 1;
 405                                 ftdi_elan_kick_command_queue(ftdi);
 406                         } else {
 407                                 mutex_unlock(&ftdi->u132_lock);
 408                                 msleep(100);
 409                                 mutex_lock(&ftdi->u132_lock);
 410                                 goto wait_2;
 411                         }
 412                 }
 413         }
 414         ftdi->received = 0;
 415         ftdi->expected = 4;
 416         ftdi->ed_found = 0;
 417         mutex_unlock(&ftdi->u132_lock);
 418 }
 419
 420 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
 421 {
 422         int ed_number = 4;
 423         mutex_lock(&ftdi->u132_lock);
 424         while (ed_number-- > 0) {
 425                 struct u132_target *target = &ftdi->target[ed_number];
 426                 target->abandoning = 1;
 427         wait:if (target->active == 1) {
 428                         int command_size = ftdi->command_next -
 429                                 ftdi->command_head;
 430                         if (command_size < COMMAND_SIZE) {
 431                                 struct u132_command *command = &ftdi->command[
 432                                         COMMAND_MASK & ftdi->command_next];
 433                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 434                                 command->length = 0x00;
 435                                 command->address = 0x00;
 436                                 command->width = 0x00;
 437                                 command->follows = 0;
 438                                 command->value = 0;
 439                                 command->buffer = &command->value;
 440                                 ftdi->command_next += 1;
 441                                 ftdi_elan_kick_command_queue(ftdi);
 442                         } else {
 443                                 mutex_unlock(&ftdi->u132_lock);
 444                                 msleep(100);
 445                                 mutex_lock(&ftdi->u132_lock);
 446                                 goto wait;
 447                         }
 448                 }
 449         }
 450         ftdi->received = 0;
 451         ftdi->expected = 4;
 452         ftdi->ed_found = 0;
 453         mutex_unlock(&ftdi->u132_lock);
 454 }
 455
 456 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
 457 {
 458         ftdi_command_queue_work(ftdi, 0);
 459 }
 460
 461 static void ftdi_elan_command_work(struct work_struct *work)
 462 {
 463         struct usb_ftdi *ftdi =
 464                 container_of(work, struct usb_ftdi, command_work.work);
 465
 466         if (ftdi->disconnected > 0) {
 467                 ftdi_elan_put_kref(ftdi);
 468                 return;
 469         } else {
 470                 int retval = ftdi_elan_command_engine(ftdi);
 471                 if (retval == -ESHUTDOWN) {
 472                         ftdi->disconnected += 1;
 473                 } else if (retval == -ENODEV) {
 474                         ftdi->disconnected += 1;
 475                 } else if (retval)
 476                         dev_err(&ftdi->udev->dev, "command error %d\n", retval);
 477                 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
 478                 return;
 479         }
 480 }
 481
 482 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
 483 {
 484         ftdi_respond_queue_work(ftdi, 0);
 485 }
 486
 487 static void ftdi_elan_respond_work(struct work_struct *work)
 488 {
 489         struct usb_ftdi *ftdi =
 490                 container_of(work, struct usb_ftdi, respond_work.work);
 491         if (ftdi->disconnected > 0) {
 492                 ftdi_elan_put_kref(ftdi);
 493                 return;
 494         } else {
 495                 int retval = ftdi_elan_respond_engine(ftdi);
 496                 if (retval == 0) {
 497                 } else if (retval == -ESHUTDOWN) {
 498                         ftdi->disconnected += 1;
 499                 } else if (retval == -ENODEV) {
 500                         ftdi->disconnected += 1;
 501                 } else if (retval == -EILSEQ) {
 502                         ftdi->disconnected += 1;
 503                 } else {
 504                         ftdi->disconnected += 1;
 505                         dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
 506                 }
 507                 if (ftdi->disconnected > 0) {
 508                         ftdi_elan_abandon_completions(ftdi);
 509                         ftdi_elan_abandon_targets(ftdi);
 510                 }
 511                 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
 512                 return;
 513         }
 514 }
 515
 516
 517 /*
 518  * the sw_lock is initially held and will be freed
 519  * after the FTDI has been synchronized
 520  *
 521  */
 522 static void ftdi_elan_status_work(struct work_struct *work)
 523 {
 524         struct usb_ftdi *ftdi =
 525                 container_of(work, struct usb_ftdi, status_work.work);
 526         int work_delay_in_msec = 0;
 527         if (ftdi->disconnected > 0) {
 528                 ftdi_elan_put_kref(ftdi);
 529                 return;
 530         } else if (ftdi->synchronized == 0) {
 531                 down(&ftdi->sw_lock);
 532                 if (ftdi_elan_synchronize(ftdi) == 0) {
 533                         ftdi->synchronized = 1;
 534                         ftdi_command_queue_work(ftdi, 1);
 535                         ftdi_respond_queue_work(ftdi, 1);
 536                         up(&ftdi->sw_lock);
 537                         work_delay_in_msec = 100;
 538                 } else {
 539                         dev_err(&ftdi->udev->dev, "synchronize failed\n");
 540                         up(&ftdi->sw_lock);
 541                         work_delay_in_msec = 10 *1000;
 542                 }
 543         } else if (ftdi->stuck_status > 0) {
 544                 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
 545                         ftdi->stuck_status = 0;
 546                         ftdi->synchronized = 0;
 547                 } else if ((ftdi->stuck_status++ % 60) == 1) {
 548                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted - please remove\n");
 549                 } else
 550                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted - checked %d times\n",
 551                                 ftdi->stuck_status);
 552                 work_delay_in_msec = 100;
 553         } else if (ftdi->enumerated == 0) {
 554                 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
 555                         ftdi->enumerated = 1;
 556                         work_delay_in_msec = 250;
 557                 } else
 558                         work_delay_in_msec = 1000;
 559         } else if (ftdi->initialized == 0) {
 560                 if (ftdi_elan_setupOHCI(ftdi) == 0) {
 561                         ftdi->initialized = 1;
 562                         work_delay_in_msec = 500;
 563                 } else {
 564                         dev_err(&ftdi->udev->dev, "initialized failed - trying again in 10 seconds\n");
 565                         work_delay_in_msec = 1 *1000;
 566                 }
 567         } else if (ftdi->registered == 0) {
 568                 work_delay_in_msec = 10;
 569                 if (ftdi_elan_hcd_init(ftdi) == 0) {
 570                         ftdi->registered = 1;
 571                 } else
 572                         dev_err(&ftdi->udev->dev, "register failed\n");
 573                 work_delay_in_msec = 250;
 574         } else {
 575                 if (ftdi_elan_checkingPCI(ftdi) == 0) {
 576                         work_delay_in_msec = 250;
 577                 } else if (ftdi->controlreg & 0x00400000) {
 578                         if (ftdi->gone_away > 0) {
 579                                 dev_err(&ftdi->udev->dev, "PCI device eject confirmed platform_dev.dev.parent=%p platform_dev.dev=%p\n",
 580                                         ftdi->platform_dev.dev.parent,
 581                                         &ftdi->platform_dev.dev);
 582                                 platform_device_unregister(&ftdi->platform_dev);
 583                                 ftdi->platform_dev.dev.parent = NULL;
 584                                 ftdi->registered = 0;
 585                                 ftdi->enumerated = 0;
 586                                 ftdi->card_ejected = 0;
 587                                 ftdi->initialized = 0;
 588                                 ftdi->gone_away = 0;
 589                         } else
 590                                 ftdi_elan_flush_targets(ftdi);
 591                         work_delay_in_msec = 250;
 592                 } else {
 593                         dev_err(&ftdi->udev->dev, "PCI device has disappeared\n");
 594                         ftdi_elan_cancel_targets(ftdi);
 595                         work_delay_in_msec = 500;
 596                         ftdi->enumerated = 0;
 597                         ftdi->initialized = 0;
 598                 }
 599         }
 600         if (ftdi->disconnected > 0) {
 601                 ftdi_elan_put_kref(ftdi);
 602                 return;
 603         } else {
 604                 ftdi_status_requeue_work(ftdi,
 605                                          msecs_to_jiffies(work_delay_in_msec));
 606                 return;
 607         }
 608 }
 609
 610
 611 /*
 612  * file_operations for the jtag interface
 613  *
 614  * the usage count for the device is incremented on open()
 615  * and decremented on release()
 616  */
 617 static int ftdi_elan_open(struct inode *inode, struct file *file)
 618 {
 619         int subminor;
 620         struct usb_interface *interface;
 621
 622         subminor = iminor(inode);
 623         interface = usb_find_interface(&ftdi_elan_driver, subminor);
 624
 625         if (!interface) {
 626                 pr_err("can't find device for minor %d\n", subminor);
 627                 return -ENODEV;
 628         } else {
 629                 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
 630                 if (!ftdi) {
 631                         return -ENODEV;
 632                 } else {
 633                         if (down_interruptible(&ftdi->sw_lock)) {
 634                                 return -EINTR;
 635                         } else {
 636                                 ftdi_elan_get_kref(ftdi);
 637                                 file->private_data = ftdi;
 638                                 return 0;
 639                         }
 640                 }
 641         }
 642 }
 643
 644 static int ftdi_elan_release(struct inode *inode, struct file *file)
 645 {
 646         struct usb_ftdi *ftdi = file->private_data;
 647         if (ftdi == NULL)
 648                 return -ENODEV;
 649         up(&ftdi->sw_lock);        /* decrement the count on our device */
 650         ftdi_elan_put_kref(ftdi);
 651         return 0;
 652 }
 653
 654
 655 /*
 656  *
 657  * blocking bulk reads are used to get data from the device
 658  *
 659  */
 660 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 661                               size_t count, loff_t *ppos)
 662 {
 663         char data[30 *3 + 4];
 664         char *d = data;
 665         int m = (sizeof(data) - 1) / 3 - 1;
 666         int bytes_read = 0;
 667         int retry_on_empty = 10;
 668         int retry_on_timeout = 5;
 669         struct usb_ftdi *ftdi = file->private_data;
 670         if (ftdi->disconnected > 0) {
 671                 return -ENODEV;
 672         }
 673         data[0] = 0;
 674 have:if (ftdi->bulk_in_left > 0) {
 675                 if (count-- > 0) {
 676                         char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 677                         ftdi->bulk_in_left -= 1;
 678                         if (bytes_read < m) {
 679                                 d += sprintf(d, " %02X", 0x000000FF & *p);
 680                         } else if (bytes_read > m) {
 681                         } else
 682                                 d += sprintf(d, " ..");
 683                         if (copy_to_user(buffer++, p, 1)) {
 684                                 return -EFAULT;
 685                         } else {
 686                                 bytes_read += 1;
 687                                 goto have;
 688                         }
 689                 } else
 690                         return bytes_read;
 691         }
 692 more:if (count > 0) {
 693                 int packet_bytes = 0;
 694                 int retval = usb_bulk_msg(ftdi->udev,
 695                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 696                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 697                                           &packet_bytes, 50);
 698                 if (packet_bytes > 2) {
 699                         ftdi->bulk_in_left = packet_bytes - 2;
 700                         ftdi->bulk_in_last = 1;
 701                         goto have;
 702                 } else if (retval == -ETIMEDOUT) {
 703                         if (retry_on_timeout-- > 0) {
 704                                 goto more;
 705                         } else if (bytes_read > 0) {
 706                                 return bytes_read;
 707                         } else
 708                                 return retval;
 709                 } else if (retval == 0) {
 710                         if (retry_on_empty-- > 0) {
 711                                 goto more;
 712                         } else
 713                                 return bytes_read;
 714                 } else
 715                         return retval;
 716         } else
 717                 return bytes_read;
 718 }
 719
 720 static void ftdi_elan_write_bulk_callback(struct urb *urb)
 721 {
 722         struct usb_ftdi *ftdi = urb->context;
 723         int status = urb->status;
 724
 725         if (status && !(status == -ENOENT || status == -ECONNRESET ||
 726                         status == -ESHUTDOWN)) {
 727                 dev_err(&ftdi->udev->dev,
 728                         "urb=%p write bulk status received: %d\n", urb, status);
 729         }
 730         usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 731                           urb->transfer_buffer, urb->transfer_dma);
 732 }
 733
 734 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 735                                                 char *buf, int command_size, int total_size)
 736 {
 737         int ed_commands = 0;
 738         int b = 0;
 739         int I = command_size;
 740         int i = ftdi->command_head;
 741         while (I-- > 0) {
 742                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 743                                                               i++];
 744                 int F = command->follows;
 745                 u8 *f = command->buffer;
 746                 if (command->header & 0x80) {
 747                         ed_commands |= 1 << (0x3 & (command->header >> 5));
 748                 }
 749                 buf[b++] = command->header;
 750                 buf[b++] = (command->length >> 0) & 0x00FF;
 751                 buf[b++] = (command->length >> 8) & 0x00FF;
 752                 buf[b++] = command->address;
 753                 buf[b++] = command->width;
 754                 while (F-- > 0) {
 755                         buf[b++] = *f++;
 756                 }
 757         }
 758         return ed_commands;
 759 }
 760
 761 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 762 {
 763         int total_size = 0;
 764         int I = command_size;
 765         int i = ftdi->command_head;
 766         while (I-- > 0) {
 767                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 768                                                               i++];
 769                 total_size += 5 + command->follows;
 770         } return total_size;
 771 }
 772
 773 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 774 {
 775         int retval;
 776         char *buf;
 777         int ed_commands;
 778         int total_size;
 779         struct urb *urb;
 780         int command_size = ftdi->command_next - ftdi->command_head;
 781         if (command_size == 0)
 782                 return 0;
 783         total_size = ftdi_elan_total_command_size(ftdi, command_size);
 784         urb = usb_alloc_urb(0, GFP_KERNEL);
 785         if (!urb)
 786                 return -ENOMEM;
 787         buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
 788                                  &urb->transfer_dma);
 789         if (!buf) {
 790                 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d commands totaling %d bytes to the Uxxx\n",
 791                         command_size, total_size);
 792                 usb_free_urb(urb);
 793                 return -ENOMEM;
 794         }
 795         ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 796                                                            command_size, total_size);
 797         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 798                                                            ftdi->bulk_out_endpointAddr), buf, total_size,
 799                           ftdi_elan_write_bulk_callback, ftdi);
 800         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 801         if (ed_commands) {
 802                 char diag[40 *3 + 4];
 803                 char *d = diag;
 804                 int m = total_size;
 805                 u8 *c = buf;
 806                 int s = (sizeof(diag) - 1) / 3;
 807                 diag[0] = 0;
 808                 while (s-- > 0 && m-- > 0) {
 809                         if (s > 0 || m == 0) {
 810                                 d += sprintf(d, " %02X", *c++);
 811                         } else
 812                                 d += sprintf(d, " ..");
 813                 }
 814         }
 815         retval = usb_submit_urb(urb, GFP_KERNEL);
 816         if (retval) {
 817                 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write %d commands totaling %d bytes to the Uxxx\n",
 818                         retval, urb, command_size, total_size);
 819                 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
 820                 usb_free_urb(urb);
 821                 return retval;
 822         }
 823         usb_free_urb(urb);        /* release our reference to this urb,
 824                                      the USB core will eventually free it entirely */
 825         ftdi->command_head += command_size;
 826         ftdi_elan_kick_respond_queue(ftdi);
 827         return 0;
 828 }
 829
 830 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 831                                   struct u132_target *target, u8 *buffer, int length)
 832 {
 833         struct urb *urb = target->urb;
 834         int halted = target->halted;
 835         int skipped = target->skipped;
 836         int actual = target->actual;
 837         int non_null = target->non_null;
 838         int toggle_bits = target->toggle_bits;
 839         int error_count = target->error_count;
 840         int condition_code = target->condition_code;
 841         int repeat_number = target->repeat_number;
 842         void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 843                           int, int, int, int) = target->callback;
 844         target->active -= 1;
 845         target->callback = NULL;
 846         (*callback) (target->endp, urb, buffer, length, toggle_bits,
 847                      error_count, condition_code, repeat_number, halted, skipped,
 848                      actual, non_null);
 849 }
 850
 851 static char *have_ed_set_response(struct usb_ftdi *ftdi,
 852                                   struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 853                                   char *b)
 854 {
 855         int payload = (ed_length >> 0) & 0x07FF;
 856         mutex_lock(&ftdi->u132_lock);
 857         target->actual = 0;
 858         target->non_null = (ed_length >> 15) & 0x0001;
 859         target->repeat_number = (ed_length >> 11) & 0x000F;
 860         if (ed_type == 0x02 || ed_type == 0x03) {
 861                 if (payload == 0 || target->abandoning > 0) {
 862                         target->abandoning = 0;
 863                         mutex_unlock(&ftdi->u132_lock);
 864                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 865                                               payload);
 866                         ftdi->received = 0;
 867                         ftdi->expected = 4;
 868                         ftdi->ed_found = 0;
 869                         return ftdi->response;
 870                 } else {
 871                         ftdi->expected = 4 + payload;
 872                         ftdi->ed_found = 1;
 873                         mutex_unlock(&ftdi->u132_lock);
 874                         return b;
 875                 }
 876         } else {
 877                 target->abandoning = 0;
 878                 mutex_unlock(&ftdi->u132_lock);
 879                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 880                                       payload);
 881                 ftdi->received = 0;
 882                 ftdi->expected = 4;
 883                 ftdi->ed_found = 0;
 884                 return ftdi->response;
 885         }
 886 }
 887
 888 static char *have_ed_get_response(struct usb_ftdi *ftdi,
 889                                   struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 890                                   char *b)
 891 {
 892         mutex_lock(&ftdi->u132_lock);
 893         target->condition_code = TD_DEVNOTRESP;
 894         target->actual = (ed_length >> 0) & 0x01FF;
 895         target->non_null = (ed_length >> 15) & 0x0001;
 896         target->repeat_number = (ed_length >> 11) & 0x000F;
 897         mutex_unlock(&ftdi->u132_lock);
 898         if (target->active)
 899                 ftdi_elan_do_callback(ftdi, target, NULL, 0);
 900         target->abandoning = 0;
 901         ftdi->received = 0;
 902         ftdi->expected = 4;
 903         ftdi->ed_found = 0;
 904         return ftdi->response;
 905 }
 906
 907
 908 /*
 909  * The engine tries to empty the FTDI fifo
 910  *
 911  * all responses found in the fifo data are dispatched thus
 912  * the response buffer can only ever hold a maximum sized
 913  * response from the Uxxx.
 914  *
 915  */
 916 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 917 {
 918         u8 *b = ftdi->response + ftdi->received;
 919         int bytes_read = 0;
 920         int retry_on_empty = 1;
 921         int retry_on_timeout = 3;
 922         int empty_packets = 0;
 923 read:{
 924                 int packet_bytes = 0;
 925                 int retval = usb_bulk_msg(ftdi->udev,
 926                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 927                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 928                                           &packet_bytes, 500);
 929                 char diag[30 *3 + 4];
 930                 char *d = diag;
 931                 int m = packet_bytes;
 932                 u8 *c = ftdi->bulk_in_buffer;
 933                 int s = (sizeof(diag) - 1) / 3;
 934                 diag[0] = 0;
 935                 while (s-- > 0 && m-- > 0) {
 936                         if (s > 0 || m == 0) {
 937                                 d += sprintf(d, " %02X", *c++);
 938                         } else
 939                                 d += sprintf(d, " ..");
 940                 }
 941                 if (packet_bytes > 2) {
 942                         ftdi->bulk_in_left = packet_bytes - 2;
 943                         ftdi->bulk_in_last = 1;
 944                         goto have;
 945                 } else if (retval == -ETIMEDOUT) {
 946                         if (retry_on_timeout-- > 0) {
 947                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
 948                                         packet_bytes, bytes_read, diag);
 949                                 goto more;
 950                         } else if (bytes_read > 0) {
 951                                 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
 952                                         bytes_read, diag);
 953                                 return -ENOMEM;
 954                         } else {
 955                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
 956                                         packet_bytes, bytes_read, diag);
 957                                 return -ENOMEM;
 958                         }
 959                 } else if (retval == -EILSEQ) {
 960                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
 961                                 retval, packet_bytes, bytes_read, diag);
 962                         return retval;
 963                 } else if (retval) {
 964                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
 965                                 retval, packet_bytes, bytes_read, diag);
 966                         return retval;
 967                 } else if (packet_bytes == 2) {
 968                         unsigned char s0 = ftdi->bulk_in_buffer[0];
 969                         unsigned char s1 = ftdi->bulk_in_buffer[1];
 970                         empty_packets += 1;
 971                         if (s0 == 0x31 && s1 == 0x60) {
 972                                 if (retry_on_empty-- > 0) {
 973                                         goto more;
 974                                 } else
 975                                         return 0;
 976                         } else if (s0 == 0x31 && s1 == 0x00) {
 977                                 if (retry_on_empty-- > 0) {
 978                                         goto more;
 979                                 } else
 980                                         return 0;
 981                         } else {
 982                                 if (retry_on_empty-- > 0) {
 983                                         goto more;
 984                                 } else
 985                                         return 0;
 986                         }
 987                 } else if (packet_bytes == 1) {
 988                         if (retry_on_empty-- > 0) {
 989                                 goto more;
 990                         } else
 991                                 return 0;
 992                 } else {
 993                         if (retry_on_empty-- > 0) {
 994                                 goto more;
 995                         } else
 996                                 return 0;
 997                 }
 998         }
 999 more:{
1000                 goto read;
1001         }
1002 have:if (ftdi->bulk_in_left > 0) {
1003                 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1004                 bytes_read += 1;
1005                 ftdi->bulk_in_left -= 1;
1006                 if (ftdi->received == 0 && c == 0xFF) {
1007                         goto have;
1008                 } else
1009                         *b++ = c;
1010                 if (++ftdi->received < ftdi->expected) {
1011                         goto have;
1012                 } else if (ftdi->ed_found) {
1013                         int ed_number = (ftdi->response[0] >> 5) & 0x03;
1014                         u16 ed_length = (ftdi->response[2] << 8) |
1015                                 ftdi->response[1];
1016                         struct u132_target *target = &ftdi->target[ed_number];
1017                         int payload = (ed_length >> 0) & 0x07FF;
1018                         char diag[30 *3 + 4];
1019                         char *d = diag;
1020                         int m = payload;
1021                         u8 *c = 4 + ftdi->response;
1022                         int s = (sizeof(diag) - 1) / 3;
1023                         diag[0] = 0;
1024                         while (s-- > 0 && m-- > 0) {
1025                                 if (s > 0 || m == 0) {
1026                                         d += sprintf(d, " %02X", *c++);
1027                                 } else
1028                                         d += sprintf(d, " ..");
1029                         }
1030                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1031                                               payload);
1032                         ftdi->received = 0;
1033                         ftdi->expected = 4;
1034                         ftdi->ed_found = 0;
1035                         b = ftdi->response;
1036                         goto have;
1037                 } else if (ftdi->expected == 8) {
1038                         u8 buscmd;
1039                         int respond_head = ftdi->respond_head++;
1040                         struct u132_respond *respond = &ftdi->respond[
1041                                 RESPOND_MASK & respond_head];
1042                         u32 data = ftdi->response[7];
1043                         data <<= 8;
1044                         data |= ftdi->response[6];
1045                         data <<= 8;
1046                         data |= ftdi->response[5];
1047                         data <<= 8;
1048                         data |= ftdi->response[4];
1049                         *respond->value = data;
1050                         *respond->result = 0;
1051                         complete(&respond->wait_completion);
1052                         ftdi->received = 0;
1053                         ftdi->expected = 4;
1054                         ftdi->ed_found = 0;
1055                         b = ftdi->response;
1056                         buscmd = (ftdi->response[0] >> 0) & 0x0F;
1057                         if (buscmd == 0x00) {
1058                         } else if (buscmd == 0x02) {
1059                         } else if (buscmd == 0x06) {
1060                         } else if (buscmd == 0x0A) {
1061                         } else
1062                                 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1063                                         buscmd, data);
1064                         goto have;
1065                 } else {
1066                         if ((ftdi->response[0] & 0x80) == 0x00) {
1067                                 ftdi->expected = 8;
1068                                 goto have;
1069                         } else {
1070                                 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1071                                 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1072                                 u16 ed_length = (ftdi->response[2] << 8) |
1073                                         ftdi->response[1];
1074                                 struct u132_target *target = &ftdi->target[
1075                                         ed_number];
1076                                 target->halted = (ftdi->response[0] >> 3) &
1077                                         0x01;
1078                                 target->skipped = (ftdi->response[0] >> 2) &
1079                                         0x01;
1080                                 target->toggle_bits = (ftdi->response[3] >> 6)
1081                                         & 0x03;
1082                                 target->error_count = (ftdi->response[3] >> 4)
1083                                         & 0x03;
1084                                 target->condition_code = (ftdi->response[
1085                                                                   3] >> 0) & 0x0F;
1086                                 if ((ftdi->response[0] & 0x10) == 0x00) {
1087                                         b = have_ed_set_response(ftdi, target,
1088                                                                  ed_length, ed_number, ed_type,
1089                                                                  b);
1090                                         goto have;
1091                                 } else {
1092                                         b = have_ed_get_response(ftdi, target,
1093                                                                  ed_length, ed_number, ed_type,
1094                                                                  b);
1095                                         goto have;
1096                                 }
1097                         }
1098                 }
1099         } else
1100                 goto more;
1101 }
1102
1103
1104 /*
1105  * create a urb, and a buffer for it, and copy the data to the urb
1106  *
1107  */
1108 static ssize_t ftdi_elan_write(struct file *file,
1109                                const char __user *user_buffer, size_t count,
1110                                loff_t *ppos)
1111 {
1112         int retval = 0;
1113         struct urb *urb;
1114         char *buf;
1115         struct usb_ftdi *ftdi = file->private_data;
1116
1117         if (ftdi->disconnected > 0) {
1118                 return -ENODEV;
1119         }
1120         if (count == 0) {
1121                 goto exit;
1122         }
1123         urb = usb_alloc_urb(0, GFP_KERNEL);
1124         if (!urb) {
1125                 retval = -ENOMEM;
1126                 goto error_1;
1127         }
1128         buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1129                                  &urb->transfer_dma);
1130         if (!buf) {
1131                 retval = -ENOMEM;
1132                 goto error_2;
1133         }
1134         if (copy_from_user(buf, user_buffer, count)) {
1135                 retval = -EFAULT;
1136                 goto error_3;
1137         }
1138         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1139                                                            ftdi->bulk_out_endpointAddr), buf, count,
1140                           ftdi_elan_write_bulk_callback, ftdi);
1141         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1142         retval = usb_submit_urb(urb, GFP_KERNEL);
1143         if (retval) {
1144                 dev_err(&ftdi->udev->dev,
1145                         "failed submitting write urb, error %d\n", retval);
1146                 goto error_3;
1147         }
1148         usb_free_urb(urb);
1149
1150 exit:
1151         return count;
1152 error_3:
1153         usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1154 error_2:
1155         usb_free_urb(urb);
1156 error_1:
1157         return retval;
1158 }
1159
1160 static const struct file_operations ftdi_elan_fops = {
1161         .owner = THIS_MODULE,
1162         .llseek = no_llseek,
1163         .read = ftdi_elan_read,
1164         .write = ftdi_elan_write,
1165         .open = ftdi_elan_open,
1166         .release = ftdi_elan_release,
1167 };
1168
1169 /*
1170  * usb class driver info in order to get a minor number from the usb core,
1171  * and to have the device registered with the driver core
1172  */
1173 static struct usb_class_driver ftdi_elan_jtag_class = {
1174         .name = "ftdi-%d-jtag",
1175         .fops = &ftdi_elan_fops,
1176         .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1177 };
1178
1179 /*
1180  * the following definitions are for the
1181  * ELAN FPGA state machgine processor that
1182  * lies on the other side of the FTDI chip
1183  */
1184 #define cPCIu132rd 0x0
1185 #define cPCIu132wr 0x1
1186 #define cPCIiord 0x2
1187 #define cPCIiowr 0x3
1188 #define cPCImemrd 0x6
1189 #define cPCImemwr 0x7
1190 #define cPCIcfgrd 0xA
1191 #define cPCIcfgwr 0xB
1192 #define cPCInull 0xF
1193 #define cU132cmd_status 0x0
1194 #define cU132flash 0x1
1195 #define cPIDsetup 0x0
1196 #define cPIDout 0x1
1197 #define cPIDin 0x2
1198 #define cPIDinonce 0x3
1199 #define cCCnoerror 0x0
1200 #define cCCcrc 0x1
1201 #define cCCbitstuff 0x2
1202 #define cCCtoggle 0x3
1203 #define cCCstall 0x4
1204 #define cCCnoresp 0x5
1205 #define cCCbadpid1 0x6
1206 #define cCCbadpid2 0x7
1207 #define cCCdataoverrun 0x8
1208 #define cCCdataunderrun 0x9
1209 #define cCCbuffoverrun 0xC
1210 #define cCCbuffunderrun 0xD
1211 #define cCCnotaccessed 0xF
1212 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1213 {
1214 wait:if (ftdi->disconnected > 0) {
1215                 return -ENODEV;
1216         } else {
1217                 int command_size;
1218                 mutex_lock(&ftdi->u132_lock);
1219                 command_size = ftdi->command_next - ftdi->command_head;
1220                 if (command_size < COMMAND_SIZE) {
1221                         struct u132_command *command = &ftdi->command[
1222                                 COMMAND_MASK & ftdi->command_next];
1223                         command->header = 0x00 | cPCIu132wr;
1224                         command->length = 0x04;
1225                         command->address = 0x00;
1226                         command->width = 0x00;
1227                         command->follows = 4;
1228                         command->value = data;
1229                         command->buffer = &command->value;
1230                         ftdi->command_next += 1;
1231                         ftdi_elan_kick_command_queue(ftdi);
1232                         mutex_unlock(&ftdi->u132_lock);
1233                         return 0;
1234                 } else {
1235                         mutex_unlock(&ftdi->u132_lock);
1236                         msleep(100);
1237                         goto wait;
1238                 }
1239         }
1240 }
1241
1242 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1243                                   u8 width, u32 data)
1244 {
1245         u8 addressofs = config_offset / 4;
1246 wait:if (ftdi->disconnected > 0) {
1247                 return -ENODEV;
1248         } else {
1249                 int command_size;
1250                 mutex_lock(&ftdi->u132_lock);
1251                 command_size = ftdi->command_next - ftdi->command_head;
1252                 if (command_size < COMMAND_SIZE) {
1253                         struct u132_command *command = &ftdi->command[
1254                                 COMMAND_MASK & ftdi->command_next];
1255                         command->header = 0x00 | (cPCIcfgwr & 0x0F);
1256                         command->length = 0x04;
1257                         command->address = addressofs;
1258                         command->width = 0x00 | (width & 0x0F);
1259                         command->follows = 4;
1260                         command->value = data;
1261                         command->buffer = &command->value;
1262                         ftdi->command_next += 1;
1263                         ftdi_elan_kick_command_queue(ftdi);
1264                         mutex_unlock(&ftdi->u132_lock);
1265                         return 0;
1266                 } else {
1267                         mutex_unlock(&ftdi->u132_lock);
1268                         msleep(100);
1269                         goto wait;
1270                 }
1271         }
1272 }
1273
1274 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1275                                   u8 width, u32 data)
1276 {
1277         u8 addressofs = mem_offset / 4;
1278 wait:if (ftdi->disconnected > 0) {
1279                 return -ENODEV;
1280         } else {
1281                 int command_size;
1282                 mutex_lock(&ftdi->u132_lock);
1283                 command_size = ftdi->command_next - ftdi->command_head;
1284                 if (command_size < COMMAND_SIZE) {
1285                         struct u132_command *command = &ftdi->command[
1286                                 COMMAND_MASK & ftdi->command_next];
1287                         command->header = 0x00 | (cPCImemwr & 0x0F);
1288                         command->length = 0x04;
1289                         command->address = addressofs;
1290                         command->width = 0x00 | (width & 0x0F);
1291                         command->follows = 4;
1292                         command->value = data;
1293                         command->buffer = &command->value;
1294                         ftdi->command_next += 1;
1295                         ftdi_elan_kick_command_queue(ftdi);
1296                         mutex_unlock(&ftdi->u132_lock);
1297                         return 0;
1298                 } else {
1299                         mutex_unlock(&ftdi->u132_lock);
1300                         msleep(100);
1301                         goto wait;
1302                 }
1303         }
1304 }
1305
1306 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1307                                u8 width, u32 data)
1308 {
1309         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1310         return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1311 }
1312
1313
1314 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1315 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1316 {
1317 wait:if (ftdi->disconnected > 0) {
1318                 return -ENODEV;
1319         } else {
1320                 int command_size;
1321                 int respond_size;
1322                 mutex_lock(&ftdi->u132_lock);
1323                 command_size = ftdi->command_next - ftdi->command_head;
1324                 respond_size = ftdi->respond_next - ftdi->respond_head;
1325                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1326                 {
1327                         struct u132_command *command = &ftdi->command[
1328                                 COMMAND_MASK & ftdi->command_next];
1329                         struct u132_respond *respond = &ftdi->respond[
1330                                 RESPOND_MASK & ftdi->respond_next];
1331                         int result = -ENODEV;
1332                         respond->result = &result;
1333                         respond->header = command->header = 0x00 | cPCIu132rd;
1334                         command->length = 0x04;
1335                         respond->address = command->address = cU132cmd_status;
1336                         command->width = 0x00;
1337                         command->follows = 0;
1338                         command->value = 0;
1339                         command->buffer = NULL;
1340                         respond->value = data;
1341                         init_completion(&respond->wait_completion);
1342                         ftdi->command_next += 1;
1343                         ftdi->respond_next += 1;
1344                         ftdi_elan_kick_command_queue(ftdi);
1345                         mutex_unlock(&ftdi->u132_lock);
1346                         wait_for_completion(&respond->wait_completion);
1347                         return result;
1348                 } else {
1349                         mutex_unlock(&ftdi->u132_lock);
1350                         msleep(100);
1351                         goto wait;
1352                 }
1353         }
1354 }
1355
1356 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1357                                  u8 width, u32 *data)
1358 {
1359         u8 addressofs = config_offset / 4;
1360 wait:if (ftdi->disconnected > 0) {
1361                 return -ENODEV;
1362         } else {
1363                 int command_size;
1364                 int respond_size;
1365                 mutex_lock(&ftdi->u132_lock);
1366                 command_size = ftdi->command_next - ftdi->command_head;
1367                 respond_size = ftdi->respond_next - ftdi->respond_head;
1368                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1369                 {
1370                         struct u132_command *command = &ftdi->command[
1371                                 COMMAND_MASK & ftdi->command_next];
1372                         struct u132_respond *respond = &ftdi->respond[
1373                                 RESPOND_MASK & ftdi->respond_next];
1374                         int result = -ENODEV;
1375                         respond->result = &result;
1376                         respond->header = command->header = 0x00 | (cPCIcfgrd &
1377                                                                     0x0F);
1378                         command->length = 0x04;
1379                         respond->address = command->address = addressofs;
1380                         command->width = 0x00 | (width & 0x0F);
1381                         command->follows = 0;
1382                         command->value = 0;
1383                         command->buffer = NULL;
1384                         respond->value = data;
1385                         init_completion(&respond->wait_completion);
1386                         ftdi->command_next += 1;
1387                         ftdi->respond_next += 1;
1388                         ftdi_elan_kick_command_queue(ftdi);
1389                         mutex_unlock(&ftdi->u132_lock);
1390                         wait_for_completion(&respond->wait_completion);
1391                         return result;
1392                 } else {
1393                         mutex_unlock(&ftdi->u132_lock);
1394                         msleep(100);
1395                         goto wait;
1396                 }
1397         }
1398 }
1399
1400 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1401                                  u8 width, u32 *data)
1402 {
1403         u8 addressofs = mem_offset / 4;
1404 wait:if (ftdi->disconnected > 0) {
1405                 return -ENODEV;
1406         } else {
1407                 int command_size;
1408                 int respond_size;
1409                 mutex_lock(&ftdi->u132_lock);
1410                 command_size = ftdi->command_next - ftdi->command_head;
1411                 respond_size = ftdi->respond_next - ftdi->respond_head;
1412                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1413                 {
1414                         struct u132_command *command = &ftdi->command[
1415                                 COMMAND_MASK & ftdi->command_next];
1416                         struct u132_respond *respond = &ftdi->respond[
1417                                 RESPOND_MASK & ftdi->respond_next];
1418                         int result = -ENODEV;
1419                         respond->result = &result;
1420                         respond->header = command->header = 0x00 | (cPCImemrd &
1421                                                                     0x0F);
1422                         command->length = 0x04;
1423                         respond->address = command->address = addressofs;
1424                         command->width = 0x00 | (width & 0x0F);
1425                         command->follows = 0;
1426                         command->value = 0;
1427                         command->buffer = NULL;
1428                         respond->value = data;
1429                         init_completion(&respond->wait_completion);
1430                         ftdi->command_next += 1;
1431                         ftdi->respond_next += 1;
1432                         ftdi_elan_kick_command_queue(ftdi);
1433                         mutex_unlock(&ftdi->u132_lock);
1434                         wait_for_completion(&respond->wait_completion);
1435                         return result;
1436                 } else {
1437                         mutex_unlock(&ftdi->u132_lock);
1438                         msleep(100);
1439                         goto wait;
1440                 }
1441         }
1442 }
1443
1444 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1445                               u8 width, u32 *data)
1446 {
1447         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1448         if (ftdi->initialized == 0) {
1449                 return -ENODEV;
1450         } else
1451                 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1452 }
1453
1454
1455 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1456 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1457                                  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1458                                  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1459                                                    int toggle_bits, int error_count, int condition_code, int repeat_number,
1460                                                    int halted, int skipped, int actual, int non_null))
1461 {
1462         u8 ed = ed_number - 1;
1463 wait:if (ftdi->disconnected > 0) {
1464                 return -ENODEV;
1465         } else if (ftdi->initialized == 0) {
1466                 return -ENODEV;
1467         } else {
1468                 int command_size;
1469                 mutex_lock(&ftdi->u132_lock);
1470                 command_size = ftdi->command_next - ftdi->command_head;
1471                 if (command_size < COMMAND_SIZE) {
1472                         struct u132_target *target = &ftdi->target[ed];
1473                         struct u132_command *command = &ftdi->command[
1474                                 COMMAND_MASK & ftdi->command_next];
1475                         command->header = 0x80 | (ed << 5);
1476                         command->length = 0x8007;
1477                         command->address = (toggle_bits << 6) | (ep_number << 2)
1478                                 | (address << 0);
1479                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1480                                                        usb_pipeout(urb->pipe));
1481                         command->follows = 8;
1482                         command->value = 0;
1483                         command->buffer = urb->setup_packet;
1484                         target->callback = callback;
1485                         target->endp = endp;
1486                         target->urb = urb;
1487                         target->active = 1;
1488                         ftdi->command_next += 1;
1489                         ftdi_elan_kick_command_queue(ftdi);
1490                         mutex_unlock(&ftdi->u132_lock);
1491                         return 0;
1492                 } else {
1493                         mutex_unlock(&ftdi->u132_lock);
1494                         msleep(100);
1495                         goto wait;
1496                 }
1497         }
1498 }
1499
1500 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1501                               void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1502                               void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1503                                                 int toggle_bits, int error_count, int condition_code, int repeat_number,
1504                                                 int halted, int skipped, int actual, int non_null))
1505 {
1506         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1507         return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1508                                      ep_number, toggle_bits, callback);
1509 }
1510
1511
1512 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1513 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1514                                  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1515                                  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1516                                                    int toggle_bits, int error_count, int condition_code, int repeat_number,
1517                                                    int halted, int skipped, int actual, int non_null))
1518 {
1519         u8 ed = ed_number - 1;
1520 wait:if (ftdi->disconnected > 0) {
1521                 return -ENODEV;
1522         } else if (ftdi->initialized == 0) {
1523                 return -ENODEV;
1524         } else {
1525                 int command_size;
1526                 mutex_lock(&ftdi->u132_lock);
1527                 command_size = ftdi->command_next - ftdi->command_head;
1528                 if (command_size < COMMAND_SIZE) {
1529                         struct u132_target *target = &ftdi->target[ed];
1530                         struct u132_command *command = &ftdi->command[
1531                                 COMMAND_MASK & ftdi->command_next];
1532                         u32 remaining_length = urb->transfer_buffer_length -
1533                                 urb->actual_length;
1534                         command->header = 0x82 | (ed << 5);
1535                         if (remaining_length == 0) {
1536                                 command->length = 0x0000;
1537                         } else if (remaining_length > 1024) {
1538                                 command->length = 0x8000 | 1023;
1539                         } else
1540                                 command->length = 0x8000 | (remaining_length -
1541                                                             1);
1542                         command->address = (toggle_bits << 6) | (ep_number << 2)
1543                                 | (address << 0);
1544                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1545                                                        usb_pipeout(urb->pipe));
1546                         command->follows = 0;
1547                         command->value = 0;
1548                         command->buffer = NULL;
1549                         target->callback = callback;
1550                         target->endp = endp;
1551                         target->urb = urb;
1552                         target->active = 1;
1553                         ftdi->command_next += 1;
1554                         ftdi_elan_kick_command_queue(ftdi);
1555                         mutex_unlock(&ftdi->u132_lock);
1556                         return 0;
1557                 } else {
1558                         mutex_unlock(&ftdi->u132_lock);
1559                         msleep(100);
1560                         goto wait;
1561                 }
1562         }
1563 }
1564
1565 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1566                               void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1567                               void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1568                                                 int toggle_bits, int error_count, int condition_code, int repeat_number,
1569                                                 int halted, int skipped, int actual, int non_null))
1570 {
1571         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1572         return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1573                                      ep_number, toggle_bits, callback);
1574 }
1575
1576
1577 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1578 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1579                                  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1580                                  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1581                                                    int toggle_bits, int error_count, int condition_code, int repeat_number,
1582                                                    int halted, int skipped, int actual, int non_null))
1583 {
1584         u8 ed = ed_number - 1;
1585 wait:if (ftdi->disconnected > 0) {
1586                 return -ENODEV;
1587         } else if (ftdi->initialized == 0) {
1588                 return -ENODEV;
1589         } else {
1590                 int command_size;
1591                 mutex_lock(&ftdi->u132_lock);
1592                 command_size = ftdi->command_next - ftdi->command_head;
1593                 if (command_size < COMMAND_SIZE) {
1594                         struct u132_target *target = &ftdi->target[ed];
1595                         struct u132_command *command = &ftdi->command[
1596                                 COMMAND_MASK & ftdi->command_next];
1597                         command->header = 0x81 | (ed << 5);
1598                         command->length = 0x0000;
1599                         command->address = (toggle_bits << 6) | (ep_number << 2)
1600                                 | (address << 0);
1601                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1602                                                        usb_pipeout(urb->pipe));
1603                         command->follows = 0;
1604                         command->value = 0;
1605                         command->buffer = NULL;
1606                         target->callback = callback;
1607                         target->endp = endp;
1608                         target->urb = urb;
1609                         target->active = 1;
1610                         ftdi->command_next += 1;
1611                         ftdi_elan_kick_command_queue(ftdi);
1612                         mutex_unlock(&ftdi->u132_lock);
1613                         return 0;
1614                 } else {
1615                         mutex_unlock(&ftdi->u132_lock);
1616                         msleep(100);
1617                         goto wait;
1618                 }
1619         }
1620 }
1621
1622 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1623                               void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1624                               void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1625                                                 int toggle_bits, int error_count, int condition_code, int repeat_number,
1626                                                 int halted, int skipped, int actual, int non_null))
1627 {
1628         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1629         return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1630                                      ep_number, toggle_bits, callback);
1631 }
1632
1633
1634 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1635 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1636                                   void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1637                                   void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1638                                                     int toggle_bits, int error_count, int condition_code, int repeat_number,
1639                                                     int halted, int skipped, int actual, int non_null))
1640 {
1641         u8 ed = ed_number - 1;
1642 wait:if (ftdi->disconnected > 0) {
1643                 return -ENODEV;
1644         } else if (ftdi->initialized == 0) {
1645                 return -ENODEV;
1646         } else {
1647                 int command_size;
1648                 mutex_lock(&ftdi->u132_lock);
1649                 command_size = ftdi->command_next - ftdi->command_head;
1650                 if (command_size < COMMAND_SIZE) {
1651                         u8 *b;
1652                         u16 urb_size;
1653                         int i = 0;
1654                         char data[30 *3 + 4];
1655                         char *d = data;
1656                         int m = (sizeof(data) - 1) / 3 - 1;
1657                         int l = 0;
1658                         struct u132_target *target = &ftdi->target[ed];
1659                         struct u132_command *command = &ftdi->command[
1660                                 COMMAND_MASK & ftdi->command_next];
1661                         command->header = 0x81 | (ed << 5);
1662                         command->address = (toggle_bits << 6) | (ep_number << 2)
1663                                 | (address << 0);
1664                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1665                                                        usb_pipeout(urb->pipe));
1666                         command->follows = min_t(u32, 1024,
1667                                                  urb->transfer_buffer_length -
1668                                                  urb->actual_length);
1669                         command->value = 0;
1670                         command->buffer = urb->transfer_buffer +
1671                                 urb->actual_length;
1672                         command->length = 0x8000 | (command->follows - 1);
1673                         b = command->buffer;
1674                         urb_size = command->follows;
1675                         data[0] = 0;
1676                         while (urb_size-- > 0) {
1677                                 if (i > m) {
1678                                 } else if (i++ < m) {
1679                                         int w = sprintf(d, " %02X", *b++);
1680                                         d += w;
1681                                         l += w;
1682                                 } else
1683                                         d += sprintf(d, " ..");
1684                         }
1685                         target->callback = callback;
1686                         target->endp = endp;
1687                         target->urb = urb;
1688                         target->active = 1;
1689                         ftdi->command_next += 1;
1690                         ftdi_elan_kick_command_queue(ftdi);
1691                         mutex_unlock(&ftdi->u132_lock);
1692                         return 0;
1693                 } else {
1694                         mutex_unlock(&ftdi->u132_lock);
1695                         msleep(100);
1696                         goto wait;
1697                 }
1698         }
1699 }
1700
1701 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1702                                void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1703                                void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1704                                                  int toggle_bits, int error_count, int condition_code, int repeat_number,
1705                                                  int halted, int skipped, int actual, int non_null))
1706 {
1707         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1708         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1709                                       ep_number, toggle_bits, callback);
1710 }
1711
1712
1713 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1714 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1715                                   void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1716                                   void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1717                                                     int toggle_bits, int error_count, int condition_code, int repeat_number,
1718                                                     int halted, int skipped, int actual, int non_null))
1719 {
1720         u8 ed = ed_number - 1;
1721 wait:if (ftdi->disconnected > 0) {
1722                 return -ENODEV;
1723         } else if (ftdi->initialized == 0) {
1724                 return -ENODEV;
1725         } else {
1726                 int command_size;
1727                 mutex_lock(&ftdi->u132_lock);
1728                 command_size = ftdi->command_next - ftdi->command_head;
1729                 if (command_size < COMMAND_SIZE) {
1730                         u32 remaining_length = urb->transfer_buffer_length -
1731                                 urb->actual_length;
1732                         struct u132_target *target = &ftdi->target[ed];
1733                         struct u132_command *command = &ftdi->command[
1734                                 COMMAND_MASK & ftdi->command_next];
1735                         command->header = 0x83 | (ed << 5);
1736                         if (remaining_length == 0) {
1737                                 command->length = 0x0000;
1738                         } else if (remaining_length > 1024) {
1739                                 command->length = 0x8000 | 1023;
1740                         } else
1741                                 command->length = 0x8000 | (remaining_length -
1742                                                             1);
1743                         command->address = (toggle_bits << 6) | (ep_number << 2)
1744                                 | (address << 0);
1745                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1746                                                        usb_pipeout(urb->pipe));
1747                         command->follows = 0;
1748                         command->value = 0;
1749                         command->buffer = NULL;
1750                         target->callback = callback;
1751                         target->endp = endp;
1752                         target->urb = urb;
1753                         target->active = 1;
1754                         ftdi->command_next += 1;
1755                         ftdi_elan_kick_command_queue(ftdi);
1756                         mutex_unlock(&ftdi->u132_lock);
1757                         return 0;
1758                 } else {
1759                         mutex_unlock(&ftdi->u132_lock);
1760                         msleep(100);
1761                         goto wait;
1762                 }
1763         }
1764 }
1765
1766 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1767                                void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1768                                void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1769                                                  int toggle_bits, int error_count, int condition_code, int repeat_number,
1770                                                  int halted, int skipped, int actual, int non_null))
1771 {
1772         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1773         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1774                                       ep_number, toggle_bits, callback);
1775 }
1776
1777
1778 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1779 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1780                                  void *endp)
1781 {
1782         u8 ed = ed_number - 1;
1783         if (ftdi->disconnected > 0) {
1784                 return -ENODEV;
1785         } else if (ftdi->initialized == 0) {
1786                 return -ENODEV;
1787         } else {
1788                 struct u132_target *target = &ftdi->target[ed];
1789                 mutex_lock(&ftdi->u132_lock);
1790                 if (target->abandoning > 0) {
1791                         mutex_unlock(&ftdi->u132_lock);
1792                         return 0;
1793                 } else {
1794                         target->abandoning = 1;
1795                 wait_1:if (target->active == 1) {
1796                                 int command_size = ftdi->command_next -
1797                                         ftdi->command_head;
1798                                 if (command_size < COMMAND_SIZE) {
1799                                         struct u132_command *command =
1800                                                 &ftdi->command[COMMAND_MASK &
1801                                                                ftdi->command_next];
1802                                         command->header = 0x80 | (ed << 5) |
1803                                                 0x4;
1804                                         command->length = 0x00;
1805                                         command->address = 0x00;
1806                                         command->width = 0x00;
1807                                         command->follows = 0;
1808                                         command->value = 0;
1809                                         command->buffer = &command->value;
1810                                         ftdi->command_next += 1;
1811                                         ftdi_elan_kick_command_queue(ftdi);
1812                                 } else {
1813                                         mutex_unlock(&ftdi->u132_lock);
1814                                         msleep(100);
1815                                         mutex_lock(&ftdi->u132_lock);
1816                                         goto wait_1;
1817                                 }
1818                         }
1819                         mutex_unlock(&ftdi->u132_lock);
1820                         return 0;
1821                 }
1822         }
1823 }
1824
1825 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1826                               void *endp)
1827 {
1828         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1829         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1830 }
1831
1832
1833 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1834 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1835 {
1836         int retry_on_empty = 10;
1837         int retry_on_timeout = 5;
1838         int retry_on_status = 20;
1839 more:{
1840                 int packet_bytes = 0;
1841                 int retval = usb_bulk_msg(ftdi->udev,
1842                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1843                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1844                                           &packet_bytes, 100);
1845                 if (packet_bytes > 2) {
1846                         char diag[30 *3 + 4];
1847                         char *d = diag;
1848                         int m = (sizeof(diag) - 1) / 3 - 1;
1849                         char *b = ftdi->bulk_in_buffer;
1850                         int bytes_read = 0;
1851                         diag[0] = 0;
1852                         while (packet_bytes-- > 0) {
1853                                 char c = *b++;
1854                                 if (bytes_read < m) {
1855                                         d += sprintf(d, " %02X",
1856                                                      0x000000FF & c);
1857                                 } else if (bytes_read > m) {
1858                                 } else
1859                                         d += sprintf(d, " ..");
1860                                 bytes_read += 1;
1861                                 continue;
1862                         }
1863                         goto more;
1864                 } else if (packet_bytes > 1) {
1865                         char s1 = ftdi->bulk_in_buffer[0];
1866                         char s2 = ftdi->bulk_in_buffer[1];
1867                         if (s1 == 0x31 && s2 == 0x60) {
1868                                 return 0;
1869                         } else if (retry_on_status-- > 0) {
1870                                 goto more;
1871                         } else {
1872                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1873                                 return -EFAULT;
1874                         }
1875                 } else if (packet_bytes > 0) {
1876                         char b1 = ftdi->bulk_in_buffer[0];
1877                         dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1878                                 b1);
1879                         if (retry_on_status-- > 0) {
1880                                 goto more;
1881                         } else {
1882                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1883                                 return -EFAULT;
1884                         }
1885                 } else if (retval == -ETIMEDOUT) {
1886                         if (retry_on_timeout-- > 0) {
1887                                 goto more;
1888                         } else {
1889                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1890                                 return -ENOMEM;
1891                         }
1892                 } else if (retval == 0) {
1893                         if (retry_on_empty-- > 0) {
1894                                 goto more;
1895                         } else {
1896                                 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1897                                 return -ENOMEM;
1898                         }
1899                 } else {
1900                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1901                         return retval;
1902                 }
1903         }
1904         return -1;
1905 }
1906
1907
1908 /*
1909  * send the long flush sequence
1910  *
1911  */
1912 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1913 {
1914         int retval;
1915         struct urb *urb;
1916         char *buf;
1917         int I = 257;
1918         int i = 0;
1919         urb = usb_alloc_urb(0, GFP_KERNEL);
1920         if (!urb)
1921                 return -ENOMEM;
1922         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1923         if (!buf) {
1924                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1925                 usb_free_urb(urb);
1926                 return -ENOMEM;
1927         }
1928         while (I-- > 0)
1929                 buf[i++] = 0x55;
1930         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1931                                                            ftdi->bulk_out_endpointAddr), buf, i,
1932                           ftdi_elan_write_bulk_callback, ftdi);
1933         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1934         retval = usb_submit_urb(urb, GFP_KERNEL);
1935         if (retval) {
1936                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1937                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1938                 usb_free_urb(urb);
1939                 return -ENOMEM;
1940         }
1941         usb_free_urb(urb);
1942         return 0;
1943 }
1944
1945
1946 /*
1947  * send the reset sequence
1948  *
1949  */
1950 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1951 {
1952         int retval;
1953         struct urb *urb;
1954         char *buf;
1955         int I = 4;
1956         int i = 0;
1957         urb = usb_alloc_urb(0, GFP_KERNEL);
1958         if (!urb)
1959                 return -ENOMEM;
1960         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1961         if (!buf) {
1962                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1963                 usb_free_urb(urb);
1964                 return -ENOMEM;
1965         }
1966         buf[i++] = 0x55;
1967         buf[i++] = 0xAA;
1968         buf[i++] = 0x5A;
1969         buf[i++] = 0xA5;
1970         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1971                                                            ftdi->bulk_out_endpointAddr), buf, i,
1972                           ftdi_elan_write_bulk_callback, ftdi);
1973         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1974         retval = usb_submit_urb(urb, GFP_KERNEL);
1975         if (retval) {
1976                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
1977                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1978                 usb_free_urb(urb);
1979                 return -ENOMEM;
1980         }
1981         usb_free_urb(urb);
1982         return 0;
1983 }
1984
1985 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
1986 {
1987         int retval;
1988         int long_stop = 10;
1989         int retry_on_timeout = 5;
1990         int retry_on_empty = 10;
1991         int err_count = 0;
1992         retval = ftdi_elan_flush_input_fifo(ftdi);
1993         if (retval)
1994                 return retval;
1995         ftdi->bulk_in_left = 0;
1996         ftdi->bulk_in_last = -1;
1997         while (long_stop-- > 0) {
1998                 int read_stop;
1999                 int read_stuck;
2000                 retval = ftdi_elan_synchronize_flush(ftdi);
2001                 if (retval)
2002                         return retval;
2003                 retval = ftdi_elan_flush_input_fifo(ftdi);
2004                 if (retval)
2005                         return retval;
2006         reset:retval = ftdi_elan_synchronize_reset(ftdi);
2007                 if (retval)
2008                         return retval;
2009                 read_stop = 100;
2010                 read_stuck = 10;
2011         read:{
2012                         int packet_bytes = 0;
2013                         retval = usb_bulk_msg(ftdi->udev,
2014                                               usb_rcvbulkpipe(ftdi->udev,
2015                                                               ftdi->bulk_in_endpointAddr),
2016                                               ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2017                                               &packet_bytes, 500);
2018                         if (packet_bytes > 2) {
2019                                 char diag[30 *3 + 4];
2020                                 char *d = diag;
2021                                 int m = (sizeof(diag) - 1) / 3 - 1;
2022                                 char *b = ftdi->bulk_in_buffer;
2023                                 int bytes_read = 0;
2024                                 unsigned char c = 0;
2025                                 diag[0] = 0;
2026                                 while (packet_bytes-- > 0) {
2027                                         c = *b++;
2028                                         if (bytes_read < m) {
2029                                                 d += sprintf(d, " %02X", c);
2030                                         } else if (bytes_read > m) {
2031                                         } else
2032                                                 d += sprintf(d, " ..");
2033                                         bytes_read += 1;
2034                                         continue;
2035                                 }
2036                                 if (c == 0x7E) {
2037                                         return 0;
2038                                 } else {
2039                                         if (c == 0x55) {
2040                                                 goto read;
2041                                         } else if (read_stop-- > 0) {
2042                                                 goto read;
2043                                         } else {
2044                                                 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2045                                                 continue;
2046                                         }
2047                                 }
2048                         } else if (packet_bytes > 1) {
2049                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2050                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2051                                 if (s1 == 0x31 && s2 == 0x00) {
2052                                         if (read_stuck-- > 0) {
2053                                                 goto read;
2054                                         } else
2055                                                 goto reset;
2056                                 } else if (s1 == 0x31 && s2 == 0x60) {
2057                                         if (read_stop-- > 0) {
2058                                                 goto read;
2059                                         } else {
2060                                                 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2061                                                 continue;
2062                                         }
2063                                 } else {
2064                                         if (read_stop-- > 0) {
2065                                                 goto read;
2066                                         } else {
2067                                                 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2068                                                 continue;
2069                                         }
2070                                 }
2071                         } else if (packet_bytes > 0) {
2072                                 if (read_stop-- > 0) {
2073                                         goto read;
2074                                 } else {
2075                                         dev_err(&ftdi->udev->dev, "retry limit reached\n");
2076                                         continue;
2077                                 }
2078                         } else if (retval == -ETIMEDOUT) {
2079                                 if (retry_on_timeout-- > 0) {
2080                                         goto read;
2081                                 } else {
2082                                         dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2083                                         continue;
2084                                 }
2085                         } else if (retval == 0) {
2086                                 if (retry_on_empty-- > 0) {
2087                                         goto read;
2088                                 } else {
2089                                         dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2090                                         continue;
2091                                 }
2092                         } else {
2093                                 err_count += 1;
2094                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2095                                         retval);
2096                                 if (read_stop-- > 0) {
2097                                         goto read;
2098                                 } else {
2099                                         dev_err(&ftdi->udev->dev, "retry limit reached\n");
2100                                         continue;
2101                                 }
2102                         }
2103                 }
2104         }
2105         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2106         return -EFAULT;
2107 }
2108
2109 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2110 {
2111         int retry_on_empty = 10;
2112         int retry_on_timeout = 5;
2113         int retry_on_status = 50;
2114 more:{
2115                 int packet_bytes = 0;
2116                 int retval = usb_bulk_msg(ftdi->udev,
2117                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2118                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2119                                           &packet_bytes, 1000);
2120                 if (packet_bytes > 2) {
2121                         char diag[30 *3 + 4];
2122                         char *d = diag;
2123                         int m = (sizeof(diag) - 1) / 3 - 1;
2124                         char *b = ftdi->bulk_in_buffer;
2125                         int bytes_read = 0;
2126                         diag[0] = 0;
2127                         while (packet_bytes-- > 0) {
2128                                 char c = *b++;
2129                                 if (bytes_read < m) {
2130                                         d += sprintf(d, " %02X",
2131                                                      0x000000FF & c);
2132                                 } else if (bytes_read > m) {
2133                                 } else
2134                                         d += sprintf(d, " ..");
2135                                 bytes_read += 1;
2136                                 continue;
2137                         }
2138                         goto more;
2139                 } else if (packet_bytes > 1) {
2140                         char s1 = ftdi->bulk_in_buffer[0];
2141                         char s2 = ftdi->bulk_in_buffer[1];
2142                         if (s1 == 0x31 && s2 == 0x60) {
2143                                 return 0;
2144                         } else if (retry_on_status-- > 0) {
2145                                 msleep(5);
2146                                 goto more;
2147                         } else
2148                                 return -EFAULT;
2149                 } else if (packet_bytes > 0) {
2150                         char b1 = ftdi->bulk_in_buffer[0];
2151                         dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2152                         if (retry_on_status-- > 0) {
2153                                 msleep(5);
2154                                 goto more;
2155                         } else {
2156                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2157                                 return -EFAULT;
2158                         }
2159                 } else if (retval == -ETIMEDOUT) {
2160                         if (retry_on_timeout-- > 0) {
2161                                 goto more;
2162                         } else {
2163                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2164                                 return -ENOMEM;
2165                         }
2166                 } else if (retval == 0) {
2167                         if (retry_on_empty-- > 0) {
2168                                 goto more;
2169                         } else {
2170                                 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2171                                 return -ENOMEM;
2172                         }
2173                 } else {
2174                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2175                         return -ENOMEM;
2176                 }
2177         }
2178         return -1;
2179 }
2180
2181 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2182 {
2183         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2184         if (UxxxStatus)
2185                 return UxxxStatus;
2186         if (ftdi->controlreg & 0x00400000) {
2187                 if (ftdi->card_ejected) {
2188                 } else {
2189                         ftdi->card_ejected = 1;
2190                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2191                                 ftdi->controlreg);
2192                 }
2193                 return -ENODEV;
2194         } else {
2195                 u8 fn = ftdi->function - 1;
2196                 int activePCIfn = fn << 8;
2197                 u32 pcidata;
2198                 u32 pciVID;
2199                 u32 pciPID;
2200                 int reg = 0;
2201                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2202                                                    &pcidata);
2203                 if (UxxxStatus)
2204                         return UxxxStatus;
2205                 pciVID = pcidata & 0xFFFF;
2206                 pciPID = (pcidata >> 16) & 0xFFFF;
2207                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2208                     ftdi->platform_data.device) {
2209                         return 0;
2210                 } else {
2211                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2212                                 ftdi->platform_data.vendor, pciVID,
2213                                 ftdi->platform_data.device, pciPID);
2214                         return -ENODEV;
2215                 }
2216         }
2217 }
2218
2219
2220 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2221                                                                    offsetof(struct ohci_regs, member), 0, data);
2222 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2223                                                                      offsetof(struct ohci_regs, member), 0, data);
2224
2225 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2226 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD |   \
2227                         OHCI_INTR_WDH)
2228 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2229 {
2230         int devices = 0;
2231         int retval;
2232         u32 hc_control;
2233         int num_ports;
2234         u32 control;
2235         u32 rh_a = -1;
2236         u32 status;
2237         u32 fminterval;
2238         u32 hc_fminterval;
2239         u32 periodicstart;
2240         u32 cmdstatus;
2241         u32 roothub_a;
2242         int mask = OHCI_INTR_INIT;
2243         int sleep_time = 0;
2244         int reset_timeout = 30;        /* ... allow extra time */
2245         int temp;
2246         retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2247         if (retval)
2248                 return retval;
2249         retval = ftdi_read_pcimem(ftdi, control, &control);
2250         if (retval)
2251                 return retval;
2252         retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2253         if (retval)
2254                 return retval;
2255         num_ports = rh_a & RH_A_NDP;
2256         retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2257         if (retval)
2258                 return retval;
2259         hc_fminterval &= 0x3fff;
2260         if (hc_fminterval != FI) {
2261         }
2262         hc_fminterval |= FSMP(hc_fminterval) << 16;
2263         retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2264         if (retval)
2265                 return retval;
2266         switch (hc_control & OHCI_CTRL_HCFS) {
2267         case OHCI_USB_OPER:
2268                 sleep_time = 0;
2269                 break;
2270         case OHCI_USB_SUSPEND:
2271         case OHCI_USB_RESUME:
2272                 hc_control &= OHCI_CTRL_RWC;
2273                 hc_control |= OHCI_USB_RESUME;
2274                 sleep_time = 10;
2275                 break;
2276         default:
2277                 hc_control &= OHCI_CTRL_RWC;
2278                 hc_control |= OHCI_USB_RESET;
2279                 sleep_time = 50;
2280                 break;
2281         }
2282         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2283         if (retval)
2284                 return retval;
2285         retval = ftdi_read_pcimem(ftdi, control, &control);
2286         if (retval)
2287                 return retval;
2288         msleep(sleep_time);
2289         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2290         if (retval)
2291                 return retval;
2292         if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2293                 for (temp = 0; temp < num_ports; temp++) {
2294                         retval = ftdi_write_pcimem(ftdi,
2295                                                    roothub.portstatus[temp], RH_PS_LSDA);
2296                         if (retval)
2297                                 return retval;
2298                 }
2299         }
2300         retval = ftdi_read_pcimem(ftdi, control, &control);
2301         if (retval)
2302                 return retval;
2303 retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2304         if (retval)
2305                 return retval;
2306         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2307         if (retval)
2308                 return retval;
2309 extra:{
2310                 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2311                 if (retval)
2312                         return retval;
2313                 if (0 != (status & OHCI_HCR)) {
2314                         if (--reset_timeout == 0) {
2315                                 dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2316                                 return -ENODEV;
2317                         } else {
2318                                 msleep(5);
2319                                 goto extra;
2320                         }
2321                 }
2322         }
2323         if (quirk & OHCI_QUIRK_INITRESET) {
2324                 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2325                 if (retval)
2326                         return retval;
2327                 retval = ftdi_read_pcimem(ftdi, control, &control);
2328                 if (retval)
2329                         return retval;
2330         }
2331         retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2332         if (retval)
2333                 return retval;
2334         retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2335         if (retval)
2336                 return retval;
2337         retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2338         if (retval)
2339                 return retval;
2340         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2341         if (retval)
2342                 return retval;
2343         retval = ftdi_write_pcimem(ftdi, fminterval,
2344                                    ((fminterval & FIT) ^ FIT) | hc_fminterval);
2345         if (retval)
2346                 return retval;
2347         retval = ftdi_write_pcimem(ftdi, periodicstart,
2348                                    ((9 *hc_fminterval) / 10) & 0x3fff);
2349         if (retval)
2350                 return retval;
2351         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2352         if (retval)
2353                 return retval;
2354         retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2355         if (retval)
2356                 return retval;
2357         if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2358                 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2359                         quirk |= OHCI_QUIRK_INITRESET;
2360                         goto retry;
2361                 } else
2362                         dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2363                                 fminterval, periodicstart);
2364         }                        /* start controller operations */
2365         hc_control &= OHCI_CTRL_RWC;
2366         hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2367         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2368         if (retval)
2369                 return retval;
2370         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2371         if (retval)
2372                 return retval;
2373         retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2374         if (retval)
2375                 return retval;
2376         retval = ftdi_read_pcimem(ftdi, control, &control);
2377         if (retval)
2378                 return retval;
2379         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2380         if (retval)
2381                 return retval;
2382         retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2383         if (retval)
2384                 return retval;
2385         retval = ftdi_write_pcimem(ftdi, intrdisable,
2386                                    OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2387                                    OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2388                                    OHCI_INTR_SO);
2389         if (retval)
2390                 return retval;        /* handle root hub init quirks ... */
2391         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2392         if (retval)
2393                 return retval;
2394         roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2395         if (quirk & OHCI_QUIRK_SUPERIO) {
2396                 roothub_a |= RH_A_NOCP;
2397                 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2398                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2399                 if (retval)
2400                         return retval;
2401         } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2402                 roothub_a |= RH_A_NPS;
2403                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2404                 if (retval)
2405                         return retval;
2406         }
2407         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2408         if (retval)
2409                 return retval;
2410         retval = ftdi_write_pcimem(ftdi, roothub.b,
2411                                    (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2412         if (retval)
2413                 return retval;
2414         retval = ftdi_read_pcimem(ftdi, control, &control);
2415         if (retval)
2416                 return retval;
2417         mdelay((roothub_a >> 23) & 0x1fe);
2418         for (temp = 0; temp < num_ports; temp++) {
2419                 u32 portstatus;
2420                 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2421                                           &portstatus);
2422                 if (retval)
2423                         return retval;
2424                 if (1 & portstatus)
2425                         devices += 1;
2426         }
2427         return devices;
2428 }
2429
2430 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2431 {
2432         u32 latence_timer;
2433         int UxxxStatus;
2434         u32 pcidata;
2435         int reg = 0;
2436         int activePCIfn = fn << 8;
2437         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2438         if (UxxxStatus)
2439                 return UxxxStatus;
2440         reg = 16;
2441         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2442                                             0xFFFFFFFF);
2443         if (UxxxStatus)
2444                 return UxxxStatus;
2445         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2446                                            &pcidata);
2447         if (UxxxStatus)
2448                 return UxxxStatus;
2449         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2450                                             0xF0000000);
2451         if (UxxxStatus)
2452                 return UxxxStatus;
2453         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2454                                            &pcidata);
2455         if (UxxxStatus)
2456                 return UxxxStatus;
2457         reg = 12;
2458         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2459                                            &latence_timer);
2460         if (UxxxStatus)
2461                 return UxxxStatus;
2462         latence_timer &= 0xFFFF00FF;
2463         latence_timer |= 0x00001600;
2464         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2465                                             latence_timer);
2466         if (UxxxStatus)
2467                 return UxxxStatus;
2468         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2469                                            &pcidata);
2470         if (UxxxStatus)
2471                 return UxxxStatus;
2472         reg = 4;
2473         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2474                                             0x06);
2475         if (UxxxStatus)
2476                 return UxxxStatus;
2477         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2478                                            &pcidata);
2479         if (UxxxStatus)
2480                 return UxxxStatus;
2481         for (reg = 0; reg <= 0x54; reg += 4) {
2482                 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2483                 if (UxxxStatus)
2484                         return UxxxStatus;
2485         }
2486         return 0;
2487 }
2488
2489 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2490 {
2491         u32 latence_timer;
2492         int UxxxStatus;
2493         u32 pcidata;
2494         int reg = 0;
2495         int activePCIfn = fn << 8;
2496         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2497         if (UxxxStatus)
2498                 return UxxxStatus;
2499         reg = 16;
2500         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2501                                             0xFFFFFFFF);
2502         if (UxxxStatus)
2503                 return UxxxStatus;
2504         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2505                                            &pcidata);
2506         if (UxxxStatus)
2507                 return UxxxStatus;
2508         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2509                                             0x00000000);
2510         if (UxxxStatus)
2511                 return UxxxStatus;
2512         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2513                                            &pcidata);
2514         if (UxxxStatus)
2515                 return UxxxStatus;
2516         reg = 12;
2517         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2518                                            &latence_timer);
2519         if (UxxxStatus)
2520                 return UxxxStatus;
2521         latence_timer &= 0xFFFF00FF;
2522         latence_timer |= 0x00001600;
2523         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2524                                             latence_timer);
2525         if (UxxxStatus)
2526                 return UxxxStatus;
2527         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2528                                            &pcidata);
2529         if (UxxxStatus)
2530                 return UxxxStatus;
2531         reg = 4;
2532         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2533                                             0x00);
2534         if (UxxxStatus)
2535                 return UxxxStatus;
2536         return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2537 }
2538
2539 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2540 {
2541         int result;
2542         int UxxxStatus;
2543         UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2544         if (UxxxStatus)
2545                 return UxxxStatus;
2546         result = ftdi_elan_check_controller(ftdi, quirk);
2547         UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2548         if (UxxxStatus)
2549                 return UxxxStatus;
2550         return result;
2551 }
2552
2553 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2554 {
2555         u32 controlreg;
2556         u8 sensebits;
2557         int UxxxStatus;
2558         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2559         if (UxxxStatus)
2560                 return UxxxStatus;
2561         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2562         if (UxxxStatus)
2563                 return UxxxStatus;
2564         msleep(750);
2565         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2566         if (UxxxStatus)
2567                 return UxxxStatus;
2568         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2569         if (UxxxStatus)
2570                 return UxxxStatus;
2571         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2572         if (UxxxStatus)
2573                 return UxxxStatus;
2574         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2575         if (UxxxStatus)
2576                 return UxxxStatus;
2577         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2578         if (UxxxStatus)
2579                 return UxxxStatus;
2580         msleep(250);
2581         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2582         if (UxxxStatus)
2583                 return UxxxStatus;
2584         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2585         if (UxxxStatus)
2586                 return UxxxStatus;
2587         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2588         if (UxxxStatus)
2589                 return UxxxStatus;
2590         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2591         if (UxxxStatus)
2592                 return UxxxStatus;
2593         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2594         if (UxxxStatus)
2595                 return UxxxStatus;
2596         msleep(1000);
2597         sensebits = (controlreg >> 16) & 0x000F;
2598         if (0x0D == sensebits)
2599                 return 0;
2600         else
2601                 return - ENXIO;
2602 }
2603
2604 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2605 {
2606         int UxxxStatus;
2607         u32 pcidata;
2608         int reg = 0;
2609         u8 fn;
2610         int activePCIfn = 0;
2611         int max_devices = 0;
2612         int controllers = 0;
2613         int unrecognized = 0;
2614         ftdi->function = 0;
2615         for (fn = 0; (fn < 4); fn++) {
2616                 u32 pciVID = 0;
2617                 u32 pciPID = 0;
2618                 int devices = 0;
2619                 activePCIfn = fn << 8;
2620                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2621                                                    &pcidata);
2622                 if (UxxxStatus)
2623                         return UxxxStatus;
2624                 pciVID = pcidata & 0xFFFF;
2625                 pciPID = (pcidata >> 16) & 0xFFFF;
2626                 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2627                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2628                         controllers += 1;
2629                 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2630                 {
2631                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2632                         controllers += 1;
2633                 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2634                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2635                         controllers += 1;
2636                 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2637                 {
2638                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2639                         controllers += 1;
2640                 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2641                         devices = ftdi_elan_found_controller(ftdi, fn,
2642                                                              OHCI_QUIRK_AMD756);
2643                         controllers += 1;
2644                 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2645                         devices = ftdi_elan_found_controller(ftdi, fn,
2646                                                              OHCI_QUIRK_ZFMICRO);
2647                         controllers += 1;
2648                 } else if (0 == pcidata) {
2649                 } else
2650                         unrecognized += 1;
2651                 if (devices > max_devices) {
2652                         max_devices = devices;
2653                         ftdi->function = fn + 1;
2654                         ftdi->platform_data.vendor = pciVID;
2655                         ftdi->platform_data.device = pciPID;
2656                 }
2657         }
2658         if (ftdi->function > 0) {
2659                 return ftdi_elan_setup_controller(ftdi, ftdi->function - 1);
2660         } else if (controllers > 0) {
2661                 return -ENXIO;
2662         } else if (unrecognized > 0) {
2663                 return -ENXIO;
2664         } else {
2665                 ftdi->enumerated = 0;
2666                 return -ENXIO;
2667         }
2668 }
2669
2670
2671 /*
2672  * we use only the first bulk-in and bulk-out endpoints
2673  */
2674 static int ftdi_elan_probe(struct usb_interface *interface,
2675                            const struct usb_device_id *id)
2676 {
2677         struct usb_host_interface *iface_desc;
2678         struct usb_endpoint_descriptor *bulk_in, *bulk_out;
2679         int retval;
2680         struct usb_ftdi *ftdi;
2681
2682         ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2683         if (!ftdi)
2684                 return -ENOMEM;
2685
2686         mutex_lock(&ftdi_module_lock);
2687         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2688         ftdi->sequence_num = ++ftdi_instances;
2689         mutex_unlock(&ftdi_module_lock);
2690         ftdi_elan_init_kref(ftdi);
2691         sema_init(&ftdi->sw_lock, 1);
2692         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2693         ftdi->interface = interface;
2694         mutex_init(&ftdi->u132_lock);
2695         ftdi->expected = 4;
2696
2697         iface_desc = interface->cur_altsetting;
2698         retval = usb_find_common_endpoints(iface_desc,
2699                         &bulk_in, &bulk_out, NULL, NULL);
2700         if (retval) {
2701                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2702                 goto error;
2703         }
2704
2705         ftdi->bulk_in_size = usb_endpoint_maxp(bulk_in);
2706         ftdi->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
2707         ftdi->bulk_in_buffer = kmalloc(ftdi->bulk_in_size, GFP_KERNEL);
2708         if (!ftdi->bulk_in_buffer) {
2709                 retval = -ENOMEM;
2710                 goto error;
2711         }
2712
2713         ftdi->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
2714
2715         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2716                  iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2717                  ftdi->bulk_out_endpointAddr);
2718         usb_set_intfdata(interface, ftdi);
2719         if (iface_desc->desc.bInterfaceNumber == 0 &&
2720             ftdi->bulk_in_endpointAddr == 0x81 &&
2721             ftdi->bulk_out_endpointAddr == 0x02) {
2722                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2723                 if (retval) {
2724                         dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2725                         usb_set_intfdata(interface, NULL);
2726                         retval = -ENOMEM;
2727                         goto error;
2728                 } else {
2729                         ftdi->class = &ftdi_elan_jtag_class;
2730                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2731                                  ftdi, iface_desc->desc.bInterfaceNumber,
2732                                  interface->minor);
2733                         return 0;
2734                 }
2735         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2736                    ftdi->bulk_in_endpointAddr == 0x83 &&
2737                    ftdi->bulk_out_endpointAddr == 0x04) {
2738                 ftdi->class = NULL;
2739                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2740                          ftdi, iface_desc->desc.bInterfaceNumber);
2741                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2742                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2743                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2744                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2745                 return 0;
2746         } else {
2747                 dev_err(&ftdi->udev->dev,
2748                         "Could not find ELAN's U132 device\n");
2749                 retval = -ENODEV;
2750                 goto error;
2751         }
2752 error:if (ftdi) {
2753                 ftdi_elan_put_kref(ftdi);
2754         }
2755         return retval;
2756 }
2757
2758 static void ftdi_elan_disconnect(struct usb_interface *interface)
2759 {
2760         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2761         ftdi->disconnected += 1;
2762         if (ftdi->class) {
2763                 int minor = interface->minor;
2764                 struct usb_class_driver *class = ftdi->class;
2765                 usb_set_intfdata(interface, NULL);
2766                 usb_deregister_dev(interface, class);
2767                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2768                          minor);
2769         } else {
2770                 ftdi_status_cancel_work(ftdi);
2771                 ftdi_command_cancel_work(ftdi);
2772                 ftdi_response_cancel_work(ftdi);
2773                 ftdi_elan_abandon_completions(ftdi);
2774                 ftdi_elan_abandon_targets(ftdi);
2775                 if (ftdi->registered) {
2776                         platform_device_unregister(&ftdi->platform_dev);
2777                         ftdi->synchronized = 0;
2778                         ftdi->enumerated = 0;
2779                         ftdi->initialized = 0;
2780                         ftdi->registered = 0;
2781                 }
2782                 ftdi->disconnected += 1;
2783                 usb_set_intfdata(interface, NULL);
2784                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2785         }
2786         ftdi_elan_put_kref(ftdi);
2787 }
2788
2789 static struct usb_driver ftdi_elan_driver = {
2790         .name = "ftdi-elan",
2791         .probe = ftdi_elan_probe,
2792         .disconnect = ftdi_elan_disconnect,
2793         .id_table = ftdi_elan_table,
2794 };
2795 static int __init ftdi_elan_init(void)
2796 {
2797         int result;
2798         pr_info("driver %s\n", ftdi_elan_driver.name);
2799         mutex_init(&ftdi_module_lock);
2800         INIT_LIST_HEAD(&ftdi_static_list);
2801         result = usb_register(&ftdi_elan_driver);
2802         if (result) {
2803                 pr_err("usb_register failed. Error number %d\n", result);
2804         }
2805         return result;
2806
2807 }
2808
2809 static void __exit ftdi_elan_exit(void)
2810 {
2811         struct usb_ftdi *ftdi;
2812         struct usb_ftdi *temp;
2813         usb_deregister(&ftdi_elan_driver);
2814         pr_info("ftdi_u132 driver deregistered\n");
2815         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2816                 ftdi_status_cancel_work(ftdi);
2817                 ftdi_command_cancel_work(ftdi);
2818                 ftdi_response_cancel_work(ftdi);
2819         }
2820 }
2821
2822
2823 module_init(ftdi_elan_init);
2824 module_exit(ftdi_elan_exit);