drivers/usb/misc/ftdi-elan.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
   4  *
   5  * Copyright(C) 2006 Elan Digital Systems Limited
   6  * http://www.elandigitalsystems.com
   7  *
   8  * Author and Maintainer - Tony Olech - Elan Digital Systems
   9  * [email protected]
  10  *
  11  * This driver was written by Tony Olech([email protected])
  12  * based on various USB client drivers in the 2.6.15 linux kernel
  13  * with constant reference to the 3rd Edition of Linux Device Drivers
  14  * published by O'Reilly
  15  *
  16  * The U132 adapter is a USB to CardBus adapter specifically designed
  17  * for PC cards that contain an OHCI host controller. Typical PC cards
  18  * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
  19  *
  20  * The U132 adapter will *NOT *work with PC cards that do not contain
  21  * an OHCI controller. A simple way to test whether a PC card has an
  22  * OHCI controller as an interface is to insert the PC card directly
  23  * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
  24  * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
  25  * then there is a good chance that the U132 adapter will support the
  26  * PC card.(you also need the specific client driver for the PC card)
  27  *
  28  * Please inform the Author and Maintainer about any PC cards that
  29  * contain OHCI Host Controller and work when directly connected to
  30  * an embedded CardBus slot but do not work when they are connected
  31  * via an ELAN U132 adapter.
  32  *
  33  */
  34
  35 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  36
  37 #include <linux/kernel.h>
  38 #include <linux/errno.h>
  39 #include <linux/init.h>
  40 #include <linux/list.h>
  41 #include <linux/ioctl.h>
  42 #include <linux/pci_ids.h>
  43 #include <linux/slab.h>
  44 #include <linux/module.h>
  45 #include <linux/kref.h>
  46 #include <linux/mutex.h>
  47 #include <linux/uaccess.h>
  48 #include <linux/usb.h>
  49 #include <linux/workqueue.h>
  50 #include <linux/platform_device.h>
  51 MODULE_AUTHOR("Tony Olech");
  52 MODULE_DESCRIPTION("FTDI ELAN driver");
  53 MODULE_LICENSE("GPL");
  54 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
  55 static bool distrust_firmware = 1;
  56 module_param(distrust_firmware, bool, 0);
  57 MODULE_PARM_DESC(distrust_firmware,
  58                  "true to distrust firmware power/overcurrent setup");
  59 extern struct platform_driver u132_platform_driver;
  60 /*
  61  * ftdi_module_lock exists to protect access to global variables
  62  *
  63  */
  64 static struct mutex ftdi_module_lock;
  65 static int ftdi_instances = 0;
  66 static struct list_head ftdi_static_list;
  67 /*
  68  * end of the global variables protected by ftdi_module_lock
  69  */
  70 #include "usb_u132.h"
  71 #include <asm/io.h>
  72 #include <linux/usb/hcd.h>
  73
  74 /* FIXME ohci.h is ONLY for internal use by the OHCI driver.
  75  * If you're going to try stuff like this, you need to split
  76  * out shareable stuff (register declarations?) into its own
  77  * file, maybe name <linux/usb/ohci.h>
  78  */
  79
  80 #include "../host/ohci.h"
  81 /* Define these values to match your devices*/
  82 #define USB_FTDI_ELAN_VENDOR_ID 0x0403
  83 #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
  84 /* table of devices that work with this driver*/
  85 static const struct usb_device_id ftdi_elan_table[] = {
  86         {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
  87         { /* Terminating entry */ }
  88 };
  89
  90 MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
  91 /* only the jtag(firmware upgrade device) interface requires
  92  * a device file and corresponding minor number, but the
  93  * interface is created unconditionally - I suppose it could
  94  * be configured or not according to a module parameter.
  95  * But since we(now) require one interface per device,
  96  * and since it unlikely that a normal installation would
  97  * require more than a couple of elan-ftdi devices, 8 seems
  98  * like a reasonable limit to have here, and if someone
  99  * really requires more than 8 devices, then they can frig the
 100  * code and recompile
 101  */
 102 #define USB_FTDI_ELAN_MINOR_BASE 192
 103 #define COMMAND_BITS 5
 104 #define COMMAND_SIZE (1<<COMMAND_BITS)
 105 #define COMMAND_MASK (COMMAND_SIZE-1)
 106 struct u132_command {
 107         u8 header;
 108         u16 length;
 109         u8 address;
 110         u8 width;
 111         u32 value;
 112         int follows;
 113         void *buffer;
 114 };
 115 #define RESPOND_BITS 5
 116 #define RESPOND_SIZE (1<<RESPOND_BITS)
 117 #define RESPOND_MASK (RESPOND_SIZE-1)
 118 struct u132_respond {
 119         u8 header;
 120         u8 address;
 121         u32 *value;
 122         int *result;
 123         struct completion wait_completion;
 124 };
 125 struct u132_target {
 126         void *endp;
 127         struct urb *urb;
 128         int toggle_bits;
 129         int error_count;
 130         int condition_code;
 131         int repeat_number;
 132         int halted;
 133         int skipped;
 134         int actual;
 135         int non_null;
 136         int active;
 137         int abandoning;
 138         void (*callback)(void *endp, struct urb *urb, u8 *buf, int len,
 139                          int toggle_bits, int error_count, int condition_code,
 140                          int repeat_number, int halted, int skipped, int actual,
 141                          int non_null);
 142 };
 143 /* Structure to hold all of our device specific stuff*/
 144 struct usb_ftdi {
 145         struct list_head ftdi_list;
 146         struct mutex u132_lock;
 147         int command_next;
 148         int command_head;
 149         struct u132_command command[COMMAND_SIZE];
 150         int respond_next;
 151         int respond_head;
 152         struct u132_respond respond[RESPOND_SIZE];
 153         struct u132_target target[4];
 154         char device_name[16];
 155         unsigned synchronized:1;
 156         unsigned enumerated:1;
 157         unsigned registered:1;
 158         unsigned initialized:1;
 159         unsigned card_ejected:1;
 160         int function;
 161         int sequence_num;
 162         int disconnected;
 163         int gone_away;
 164         int stuck_status;
 165         int status_queue_delay;
 166         struct semaphore sw_lock;
 167         struct usb_device *udev;
 168         struct usb_interface *interface;
 169         struct usb_class_driver *class;
 170         struct delayed_work status_work;
 171         struct delayed_work command_work;
 172         struct delayed_work respond_work;
 173         struct u132_platform_data platform_data;
 174         struct resource resources[0];
 175         struct platform_device platform_dev;
 176         unsigned char *bulk_in_buffer;
 177         size_t bulk_in_size;
 178         size_t bulk_in_last;
 179         size_t bulk_in_left;
 180         __u8 bulk_in_endpointAddr;
 181         __u8 bulk_out_endpointAddr;
 182         struct kref kref;
 183         u32 controlreg;
 184         u8 response[4 + 1024];
 185         int expected;
 186         int received;
 187         int ed_found;
 188 };
 189 #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
 190 #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
 191                                                     platform_dev)
 192 static struct usb_driver ftdi_elan_driver;
 193 static void ftdi_elan_delete(struct kref *kref)
 194 {
 195         struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
 196         dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
 197         usb_put_dev(ftdi->udev);
 198         ftdi->disconnected += 1;
 199         mutex_lock(&ftdi_module_lock);
 200         list_del_init(&ftdi->ftdi_list);
 201         ftdi_instances -= 1;
 202         mutex_unlock(&ftdi_module_lock);
 203         kfree(ftdi->bulk_in_buffer);
 204         ftdi->bulk_in_buffer = NULL;
 205         kfree(ftdi);
 206 }
 207
 208 static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
 209 {
 210         kref_put(&ftdi->kref, ftdi_elan_delete);
 211 }
 212
 213 static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
 214 {
 215         kref_get(&ftdi->kref);
 216 }
 217
 218 static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
 219 {
 220         kref_init(&ftdi->kref);
 221 }
 222
 223 static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 224 {
 225         if (!schedule_delayed_work(&ftdi->status_work, delta))
 226                 kref_put(&ftdi->kref, ftdi_elan_delete);
 227 }
 228
 229 static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 230 {
 231         if (schedule_delayed_work(&ftdi->status_work, delta))
 232                 kref_get(&ftdi->kref);
 233 }
 234
 235 static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
 236 {
 237         if (cancel_delayed_work_sync(&ftdi->status_work))
 238                 kref_put(&ftdi->kref, ftdi_elan_delete);
 239 }
 240
 241 static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 242 {
 243         if (!schedule_delayed_work(&ftdi->command_work, delta))
 244                 kref_put(&ftdi->kref, ftdi_elan_delete);
 245 }
 246
 247 static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 248 {
 249         if (schedule_delayed_work(&ftdi->command_work, delta))
 250                 kref_get(&ftdi->kref);
 251 }
 252
 253 static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
 254 {
 255         if (cancel_delayed_work_sync(&ftdi->command_work))
 256                 kref_put(&ftdi->kref, ftdi_elan_delete);
 257 }
 258
 259 static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
 260                                        unsigned int delta)
 261 {
 262         if (!schedule_delayed_work(&ftdi->respond_work, delta))
 263                 kref_put(&ftdi->kref, ftdi_elan_delete);
 264 }
 265
 266 static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 267 {
 268         if (schedule_delayed_work(&ftdi->respond_work, delta))
 269                 kref_get(&ftdi->kref);
 270 }
 271
 272 static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
 273 {
 274         if (cancel_delayed_work_sync(&ftdi->respond_work))
 275                 kref_put(&ftdi->kref, ftdi_elan_delete);
 276 }
 277
 278 void ftdi_elan_gone_away(struct platform_device *pdev)
 279 {
 280         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
 281         ftdi->gone_away += 1;
 282         ftdi_elan_put_kref(ftdi);
 283 }
 284
 285
 286 EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
 287 static void ftdi_release_platform_dev(struct device *dev)
 288 {
 289         dev->parent = NULL;
 290 }
 291
 292 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 293                                   struct u132_target *target, u8 *buffer, int length);
 294 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
 295 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
 296 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
 297 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
 298 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
 299 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
 300 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
 301 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
 302 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
 303 static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
 304 {
 305         if (ftdi->platform_dev.dev.parent)
 306                 return -EBUSY;
 307
 308         ftdi_elan_get_kref(ftdi);
 309         ftdi->platform_data.potpg = 100;
 310         ftdi->platform_data.reset = NULL;
 311         ftdi->platform_dev.id = ftdi->sequence_num;
 312         ftdi->platform_dev.resource = ftdi->resources;
 313         ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
 314         ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
 315         ftdi->platform_dev.dev.parent = NULL;
 316         ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
 317         ftdi->platform_dev.dev.dma_mask = NULL;
 318         snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
 319         ftdi->platform_dev.name = ftdi->device_name;
 320         dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
 321         request_module("u132_hcd");
 322         dev_info(&ftdi->udev->dev, "registering '%s'\n",
 323                  ftdi->platform_dev.name);
 324
 325         return platform_device_register(&ftdi->platform_dev);
 326 }
 327
 328 static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
 329 {
 330         mutex_lock(&ftdi->u132_lock);
 331         while (ftdi->respond_next > ftdi->respond_head) {
 332                 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
 333                                                               ftdi->respond_head++];
 334                 *respond->result = -ESHUTDOWN;
 335                 *respond->value = 0;
 336                 complete(&respond->wait_completion);
 337         }
 338         mutex_unlock(&ftdi->u132_lock);
 339 }
 340
 341 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
 342 {
 343         int ed_number = 4;
 344         mutex_lock(&ftdi->u132_lock);
 345         while (ed_number-- > 0) {
 346                 struct u132_target *target = &ftdi->target[ed_number];
 347                 if (target->active == 1) {
 348                         target->condition_code = TD_DEVNOTRESP;
 349                         mutex_unlock(&ftdi->u132_lock);
 350                         ftdi_elan_do_callback(ftdi, target, NULL, 0);
 351                         mutex_lock(&ftdi->u132_lock);
 352                 }
 353         }
 354         ftdi->received = 0;
 355         ftdi->expected = 4;
 356         ftdi->ed_found = 0;
 357         mutex_unlock(&ftdi->u132_lock);
 358 }
 359
 360 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
 361 {
 362         int ed_number = 4;
 363         mutex_lock(&ftdi->u132_lock);
 364         while (ed_number-- > 0) {
 365                 struct u132_target *target = &ftdi->target[ed_number];
 366                 target->abandoning = 1;
 367         wait_1:if (target->active == 1) {
 368                         int command_size = ftdi->command_next -
 369                                 ftdi->command_head;
 370                         if (command_size < COMMAND_SIZE) {
 371                                 struct u132_command *command = &ftdi->command[
 372                                         COMMAND_MASK & ftdi->command_next];
 373                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 374                                 command->length = 0x00;
 375                                 command->address = 0x00;
 376                                 command->width = 0x00;
 377                                 command->follows = 0;
 378                                 command->value = 0;
 379                                 command->buffer = &command->value;
 380                                 ftdi->command_next += 1;
 381                                 ftdi_elan_kick_command_queue(ftdi);
 382                         } else {
 383                                 mutex_unlock(&ftdi->u132_lock);
 384                                 msleep(100);
 385                                 mutex_lock(&ftdi->u132_lock);
 386                                 goto wait_1;
 387                         }
 388                 }
 389         wait_2:if (target->active == 1) {
 390                         int command_size = ftdi->command_next -
 391                                 ftdi->command_head;
 392                         if (command_size < COMMAND_SIZE) {
 393                                 struct u132_command *command = &ftdi->command[
 394                                         COMMAND_MASK & ftdi->command_next];
 395                                 command->header = 0x90 | (ed_number << 5);
 396                                 command->length = 0x00;
 397                                 command->address = 0x00;
 398                                 command->width = 0x00;
 399                                 command->follows = 0;
 400                                 command->value = 0;
 401                                 command->buffer = &command->value;
 402                                 ftdi->command_next += 1;
 403                                 ftdi_elan_kick_command_queue(ftdi);
 404                         } else {
 405                                 mutex_unlock(&ftdi->u132_lock);
 406                                 msleep(100);
 407                                 mutex_lock(&ftdi->u132_lock);
 408                                 goto wait_2;
 409                         }
 410                 }
 411         }
 412         ftdi->received = 0;
 413         ftdi->expected = 4;
 414         ftdi->ed_found = 0;
 415         mutex_unlock(&ftdi->u132_lock);
 416 }
 417
 418 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
 419 {
 420         int ed_number = 4;
 421         mutex_lock(&ftdi->u132_lock);
 422         while (ed_number-- > 0) {
 423                 struct u132_target *target = &ftdi->target[ed_number];
 424                 target->abandoning = 1;
 425         wait:if (target->active == 1) {
 426                         int command_size = ftdi->command_next -
 427                                 ftdi->command_head;
 428                         if (command_size < COMMAND_SIZE) {
 429                                 struct u132_command *command = &ftdi->command[
 430                                         COMMAND_MASK & ftdi->command_next];
 431                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 432                                 command->length = 0x00;
 433                                 command->address = 0x00;
 434                                 command->width = 0x00;
 435                                 command->follows = 0;
 436                                 command->value = 0;
 437                                 command->buffer = &command->value;
 438                                 ftdi->command_next += 1;
 439                                 ftdi_elan_kick_command_queue(ftdi);
 440                         } else {
 441                                 mutex_unlock(&ftdi->u132_lock);
 442                                 msleep(100);
 443                                 mutex_lock(&ftdi->u132_lock);
 444                                 goto wait;
 445                         }
 446                 }
 447         }
 448         ftdi->received = 0;
 449         ftdi->expected = 4;
 450         ftdi->ed_found = 0;
 451         mutex_unlock(&ftdi->u132_lock);
 452 }
 453
 454 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
 455 {
 456         ftdi_command_queue_work(ftdi, 0);
 457 }
 458
 459 static void ftdi_elan_command_work(struct work_struct *work)
 460 {
 461         struct usb_ftdi *ftdi =
 462                 container_of(work, struct usb_ftdi, command_work.work);
 463
 464         if (ftdi->disconnected > 0) {
 465                 ftdi_elan_put_kref(ftdi);
 466                 return;
 467         } else {
 468                 int retval = ftdi_elan_command_engine(ftdi);
 469                 if (retval == -ESHUTDOWN) {
 470                         ftdi->disconnected += 1;
 471                 } else if (retval == -ENODEV) {
 472                         ftdi->disconnected += 1;
 473                 } else if (retval)
 474                         dev_err(&ftdi->udev->dev, "command error %d\n", retval);
 475                 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
 476                 return;
 477         }
 478 }
 479
 480 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
 481 {
 482         ftdi_respond_queue_work(ftdi, 0);
 483 }
 484
 485 static void ftdi_elan_respond_work(struct work_struct *work)
 486 {
 487         struct usb_ftdi *ftdi =
 488                 container_of(work, struct usb_ftdi, respond_work.work);
 489         if (ftdi->disconnected > 0) {
 490                 ftdi_elan_put_kref(ftdi);
 491                 return;
 492         } else {
 493                 int retval = ftdi_elan_respond_engine(ftdi);
 494                 if (retval == 0) {
 495                 } else if (retval == -ESHUTDOWN) {
 496                         ftdi->disconnected += 1;
 497                 } else if (retval == -ENODEV) {
 498                         ftdi->disconnected += 1;
 499                 } else if (retval == -EILSEQ) {
 500                         ftdi->disconnected += 1;
 501                 } else {
 502                         ftdi->disconnected += 1;
 503                         dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
 504                 }
 505                 if (ftdi->disconnected > 0) {
 506                         ftdi_elan_abandon_completions(ftdi);
 507                         ftdi_elan_abandon_targets(ftdi);
 508                 }
 509                 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
 510                 return;
 511         }
 512 }
 513
 514
 515 /*
 516  * the sw_lock is initially held and will be freed
 517  * after the FTDI has been synchronized
 518  *
 519  */
 520 static void ftdi_elan_status_work(struct work_struct *work)
 521 {
 522         struct usb_ftdi *ftdi =
 523                 container_of(work, struct usb_ftdi, status_work.work);
 524         int work_delay_in_msec = 0;
 525         if (ftdi->disconnected > 0) {
 526                 ftdi_elan_put_kref(ftdi);
 527                 return;
 528         } else if (ftdi->synchronized == 0) {
 529                 down(&ftdi->sw_lock);
 530                 if (ftdi_elan_synchronize(ftdi) == 0) {
 531                         ftdi->synchronized = 1;
 532                         ftdi_command_queue_work(ftdi, 1);
 533                         ftdi_respond_queue_work(ftdi, 1);
 534                         up(&ftdi->sw_lock);
 535                         work_delay_in_msec = 100;
 536                 } else {
 537                         dev_err(&ftdi->udev->dev, "synchronize failed\n");
 538                         up(&ftdi->sw_lock);
 539                         work_delay_in_msec = 10 *1000;
 540                 }
 541         } else if (ftdi->stuck_status > 0) {
 542                 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
 543                         ftdi->stuck_status = 0;
 544                         ftdi->synchronized = 0;
 545                 } else if ((ftdi->stuck_status++ % 60) == 1) {
 546                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted - please remove\n");
 547                 } else
 548                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted - checked %d times\n",
 549                                 ftdi->stuck_status);
 550                 work_delay_in_msec = 100;
 551         } else if (ftdi->enumerated == 0) {
 552                 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
 553                         ftdi->enumerated = 1;
 554                         work_delay_in_msec = 250;
 555                 } else
 556                         work_delay_in_msec = 1000;
 557         } else if (ftdi->initialized == 0) {
 558                 if (ftdi_elan_setupOHCI(ftdi) == 0) {
 559                         ftdi->initialized = 1;
 560                         work_delay_in_msec = 500;
 561                 } else {
 562                         dev_err(&ftdi->udev->dev, "initialized failed - trying again in 10 seconds\n");
 563                         work_delay_in_msec = 1 *1000;
 564                 }
 565         } else if (ftdi->registered == 0) {
 566                 work_delay_in_msec = 10;
 567                 if (ftdi_elan_hcd_init(ftdi) == 0) {
 568                         ftdi->registered = 1;
 569                 } else
 570                         dev_err(&ftdi->udev->dev, "register failed\n");
 571                 work_delay_in_msec = 250;
 572         } else {
 573                 if (ftdi_elan_checkingPCI(ftdi) == 0) {
 574                         work_delay_in_msec = 250;
 575                 } else if (ftdi->controlreg & 0x00400000) {
 576                         if (ftdi->gone_away > 0) {
 577                                 dev_err(&ftdi->udev->dev, "PCI device eject confirmed platform_dev.dev.parent=%p platform_dev.dev=%p\n",
 578                                         ftdi->platform_dev.dev.parent,
 579                                         &ftdi->platform_dev.dev);
 580                                 platform_device_unregister(&ftdi->platform_dev);
 581                                 ftdi->platform_dev.dev.parent = NULL;
 582                                 ftdi->registered = 0;
 583                                 ftdi->enumerated = 0;
 584                                 ftdi->card_ejected = 0;
 585                                 ftdi->initialized = 0;
 586                                 ftdi->gone_away = 0;
 587                         } else
 588                                 ftdi_elan_flush_targets(ftdi);
 589                         work_delay_in_msec = 250;
 590                 } else {
 591                         dev_err(&ftdi->udev->dev, "PCI device has disappeared\n");
 592                         ftdi_elan_cancel_targets(ftdi);
 593                         work_delay_in_msec = 500;
 594                         ftdi->enumerated = 0;
 595                         ftdi->initialized = 0;
 596                 }
 597         }
 598         if (ftdi->disconnected > 0) {
 599                 ftdi_elan_put_kref(ftdi);
 600                 return;
 601         } else {
 602                 ftdi_status_requeue_work(ftdi,
 603                                          msecs_to_jiffies(work_delay_in_msec));
 604                 return;
 605         }
 606 }
 607
 608
 609 /*
 610  * file_operations for the jtag interface
 611  *
 612  * the usage count for the device is incremented on open()
 613  * and decremented on release()
 614  */
 615 static int ftdi_elan_open(struct inode *inode, struct file *file)
 616 {
 617         int subminor;
 618         struct usb_interface *interface;
 619
 620         subminor = iminor(inode);
 621         interface = usb_find_interface(&ftdi_elan_driver, subminor);
 622
 623         if (!interface) {
 624                 pr_err("can't find device for minor %d\n", subminor);
 625                 return -ENODEV;
 626         } else {
 627                 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
 628                 if (!ftdi) {
 629                         return -ENODEV;
 630                 } else {
 631                         if (down_interruptible(&ftdi->sw_lock)) {
 632                                 return -EINTR;
 633                         } else {
 634                                 ftdi_elan_get_kref(ftdi);
 635                                 file->private_data = ftdi;
 636                                 return 0;
 637                         }
 638                 }
 639         }
 640 }
 641
 642 static int ftdi_elan_release(struct inode *inode, struct file *file)
 643 {
 644         struct usb_ftdi *ftdi = file->private_data;
 645         if (ftdi == NULL)
 646                 return -ENODEV;
 647         up(&ftdi->sw_lock);        /* decrement the count on our device */
 648         ftdi_elan_put_kref(ftdi);
 649         return 0;
 650 }
 651
 652
 653 /*
 654  *
 655  * blocking bulk reads are used to get data from the device
 656  *
 657  */
 658 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 659                               size_t count, loff_t *ppos)
 660 {
 661         char data[30 *3 + 4];
 662         char *d = data;
 663         int m = (sizeof(data) - 1) / 3 - 1;
 664         int bytes_read = 0;
 665         int retry_on_empty = 10;
 666         int retry_on_timeout = 5;
 667         struct usb_ftdi *ftdi = file->private_data;
 668         if (ftdi->disconnected > 0) {
 669                 return -ENODEV;
 670         }
 671         data[0] = 0;
 672 have:if (ftdi->bulk_in_left > 0) {
 673                 if (count-- > 0) {
 674                         char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 675                         ftdi->bulk_in_left -= 1;
 676                         if (bytes_read < m) {
 677                                 d += sprintf(d, " %02X", 0x000000FF & *p);
 678                         } else if (bytes_read > m) {
 679                         } else
 680                                 d += sprintf(d, " ..");
 681                         if (copy_to_user(buffer++, p, 1)) {
 682                                 return -EFAULT;
 683                         } else {
 684                                 bytes_read += 1;
 685                                 goto have;
 686                         }
 687                 } else
 688                         return bytes_read;
 689         }
 690 more:if (count > 0) {
 691                 int packet_bytes = 0;
 692                 int retval = usb_bulk_msg(ftdi->udev,
 693                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 694                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 695                                           &packet_bytes, 50);
 696                 if (packet_bytes > 2) {
 697                         ftdi->bulk_in_left = packet_bytes - 2;
 698                         ftdi->bulk_in_last = 1;
 699                         goto have;
 700                 } else if (retval == -ETIMEDOUT) {
 701                         if (retry_on_timeout-- > 0) {
 702                                 goto more;
 703                         } else if (bytes_read > 0) {
 704                                 return bytes_read;
 705                         } else
 706                                 return retval;
 707                 } else if (retval == 0) {
 708                         if (retry_on_empty-- > 0) {
 709                                 goto more;
 710                         } else
 711                                 return bytes_read;
 712                 } else
 713                         return retval;
 714         } else
 715                 return bytes_read;
 716 }
 717
 718 static void ftdi_elan_write_bulk_callback(struct urb *urb)
 719 {
 720         struct usb_ftdi *ftdi = urb->context;
 721         int status = urb->status;
 722
 723         if (status && !(status == -ENOENT || status == -ECONNRESET ||
 724                         status == -ESHUTDOWN)) {
 725                 dev_err(&ftdi->udev->dev,
 726                         "urb=%p write bulk status received: %d\n", urb, status);
 727         }
 728         usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 729                           urb->transfer_buffer, urb->transfer_dma);
 730 }
 731
 732 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 733                                                 char *buf, int command_size, int total_size)
 734 {
 735         int ed_commands = 0;
 736         int b = 0;
 737         int I = command_size;
 738         int i = ftdi->command_head;
 739         while (I-- > 0) {
 740                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 741                                                               i++];
 742                 int F = command->follows;
 743                 u8 *f = command->buffer;
 744                 if (command->header & 0x80) {
 745                         ed_commands |= 1 << (0x3 & (command->header >> 5));
 746                 }
 747                 buf[b++] = command->header;
 748                 buf[b++] = (command->length >> 0) & 0x00FF;
 749                 buf[b++] = (command->length >> 8) & 0x00FF;
 750                 buf[b++] = command->address;
 751                 buf[b++] = command->width;
 752                 while (F-- > 0) {
 753                         buf[b++] = *f++;
 754                 }
 755         }
 756         return ed_commands;
 757 }
 758
 759 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 760 {
 761         int total_size = 0;
 762         int I = command_size;
 763         int i = ftdi->command_head;
 764         while (I-- > 0) {
 765                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 766                                                               i++];
 767                 total_size += 5 + command->follows;
 768         }
 769         return total_size;
 770 }
 771
 772 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 773 {
 774         int retval;
 775         char *buf;
 776         int ed_commands;
 777         int total_size;
 778         struct urb *urb;
 779         int command_size = ftdi->command_next - ftdi->command_head;
 780         if (command_size == 0)
 781                 return 0;
 782         total_size = ftdi_elan_total_command_size(ftdi, command_size);
 783         urb = usb_alloc_urb(0, GFP_KERNEL);
 784         if (!urb)
 785                 return -ENOMEM;
 786         buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
 787                                  &urb->transfer_dma);
 788         if (!buf) {
 789                 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d commands totaling %d bytes to the Uxxx\n",
 790                         command_size, total_size);
 791                 usb_free_urb(urb);
 792                 return -ENOMEM;
 793         }
 794         ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 795                                                            command_size, total_size);
 796         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 797                                                            ftdi->bulk_out_endpointAddr), buf, total_size,
 798                           ftdi_elan_write_bulk_callback, ftdi);
 799         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 800         if (ed_commands) {
 801                 char diag[40 *3 + 4];
 802                 char *d = diag;
 803                 int m = total_size;
 804                 u8 *c = buf;
 805                 int s = (sizeof(diag) - 1) / 3;
 806                 diag[0] = 0;
 807                 while (s-- > 0 && m-- > 0) {
 808                         if (s > 0 || m == 0) {
 809                                 d += sprintf(d, " %02X", *c++);
 810                         } else
 811                                 d += sprintf(d, " ..");
 812                 }
 813         }
 814         retval = usb_submit_urb(urb, GFP_KERNEL);
 815         if (retval) {
 816                 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write %d commands totaling %d bytes to the Uxxx\n",
 817                         retval, urb, command_size, total_size);
 818                 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
 819                 usb_free_urb(urb);
 820                 return retval;
 821         }
 822         usb_free_urb(urb);        /* release our reference to this urb,
 823                                      the USB core will eventually free it entirely */
 824         ftdi->command_head += command_size;
 825         ftdi_elan_kick_respond_queue(ftdi);
 826         return 0;
 827 }
 828
 829 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 830                                   struct u132_target *target, u8 *buffer, int length)
 831 {
 832         struct urb *urb = target->urb;
 833         int halted = target->halted;
 834         int skipped = target->skipped;
 835         int actual = target->actual;
 836         int non_null = target->non_null;
 837         int toggle_bits = target->toggle_bits;
 838         int error_count = target->error_count;
 839         int condition_code = target->condition_code;
 840         int repeat_number = target->repeat_number;
 841         void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 842                           int, int, int, int) = target->callback;
 843         target->active -= 1;
 844         target->callback = NULL;
 845         (*callback) (target->endp, urb, buffer, length, toggle_bits,
 846                      error_count, condition_code, repeat_number, halted, skipped,
 847                      actual, non_null);
 848 }
 849
 850 static char *have_ed_set_response(struct usb_ftdi *ftdi,
 851                                   struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 852                                   char *b)
 853 {
 854         int payload = (ed_length >> 0) & 0x07FF;
 855         mutex_lock(&ftdi->u132_lock);
 856         target->actual = 0;
 857         target->non_null = (ed_length >> 15) & 0x0001;
 858         target->repeat_number = (ed_length >> 11) & 0x000F;
 859         if (ed_type == 0x02 || ed_type == 0x03) {
 860                 if (payload == 0 || target->abandoning > 0) {
 861                         target->abandoning = 0;
 862                         mutex_unlock(&ftdi->u132_lock);
 863                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 864                                               payload);
 865                         ftdi->received = 0;
 866                         ftdi->expected = 4;
 867                         ftdi->ed_found = 0;
 868                         return ftdi->response;
 869                 } else {
 870                         ftdi->expected = 4 + payload;
 871                         ftdi->ed_found = 1;
 872                         mutex_unlock(&ftdi->u132_lock);
 873                         return b;
 874                 }
 875         } else {
 876                 target->abandoning = 0;
 877                 mutex_unlock(&ftdi->u132_lock);
 878                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 879                                       payload);
 880                 ftdi->received = 0;
 881                 ftdi->expected = 4;
 882                 ftdi->ed_found = 0;
 883                 return ftdi->response;
 884         }
 885 }
 886
 887 static char *have_ed_get_response(struct usb_ftdi *ftdi,
 888                                   struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 889                                   char *b)
 890 {
 891         mutex_lock(&ftdi->u132_lock);
 892         target->condition_code = TD_DEVNOTRESP;
 893         target->actual = (ed_length >> 0) & 0x01FF;
 894         target->non_null = (ed_length >> 15) & 0x0001;
 895         target->repeat_number = (ed_length >> 11) & 0x000F;
 896         mutex_unlock(&ftdi->u132_lock);
 897         if (target->active)
 898                 ftdi_elan_do_callback(ftdi, target, NULL, 0);
 899         target->abandoning = 0;
 900         ftdi->received = 0;
 901         ftdi->expected = 4;
 902         ftdi->ed_found = 0;
 903         return ftdi->response;
 904 }
 905
 906
 907 /*
 908  * The engine tries to empty the FTDI fifo
 909  *
 910  * all responses found in the fifo data are dispatched thus
 911  * the response buffer can only ever hold a maximum sized
 912  * response from the Uxxx.
 913  *
 914  */
 915 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 916 {
 917         u8 *b = ftdi->response + ftdi->received;
 918         int bytes_read = 0;
 919         int retry_on_empty = 1;
 920         int retry_on_timeout = 3;
 921 read:{
 922                 int packet_bytes = 0;
 923                 int retval = usb_bulk_msg(ftdi->udev,
 924                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 925                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 926                                           &packet_bytes, 500);
 927                 char diag[30 *3 + 4];
 928                 char *d = diag;
 929                 int m = packet_bytes;
 930                 u8 *c = ftdi->bulk_in_buffer;
 931                 int s = (sizeof(diag) - 1) / 3;
 932                 diag[0] = 0;
 933                 while (s-- > 0 && m-- > 0) {
 934                         if (s > 0 || m == 0) {
 935                                 d += sprintf(d, " %02X", *c++);
 936                         } else
 937                                 d += sprintf(d, " ..");
 938                 }
 939                 if (packet_bytes > 2) {
 940                         ftdi->bulk_in_left = packet_bytes - 2;
 941                         ftdi->bulk_in_last = 1;
 942                         goto have;
 943                 } else if (retval == -ETIMEDOUT) {
 944                         if (retry_on_timeout-- > 0) {
 945                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
 946                                         packet_bytes, bytes_read, diag);
 947                                 goto more;
 948                         } else if (bytes_read > 0) {
 949                                 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
 950                                         bytes_read, diag);
 951                                 return -ENOMEM;
 952                         } else {
 953                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
 954                                         packet_bytes, bytes_read, diag);
 955                                 return -ENOMEM;
 956                         }
 957                 } else if (retval == -EILSEQ) {
 958                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
 959                                 retval, packet_bytes, bytes_read, diag);
 960                         return retval;
 961                 } else if (retval) {
 962                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
 963                                 retval, packet_bytes, bytes_read, diag);
 964                         return retval;
 965                 } else {
 966                         if (retry_on_empty-- > 0) {
 967                                 goto more;
 968                         } else
 969                                 return 0;
 970                 }
 971         }
 972 more:{
 973                 goto read;
 974         }
 975 have:if (ftdi->bulk_in_left > 0) {
 976                 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
 977                 bytes_read += 1;
 978                 ftdi->bulk_in_left -= 1;
 979                 if (ftdi->received == 0 && c == 0xFF) {
 980                         goto have;
 981                 } else
 982                         *b++ = c;
 983                 if (++ftdi->received < ftdi->expected) {
 984                         goto have;
 985                 } else if (ftdi->ed_found) {
 986                         int ed_number = (ftdi->response[0] >> 5) & 0x03;
 987                         u16 ed_length = (ftdi->response[2] << 8) |
 988                                 ftdi->response[1];
 989                         struct u132_target *target = &ftdi->target[ed_number];
 990                         int payload = (ed_length >> 0) & 0x07FF;
 991                         char diag[30 *3 + 4];
 992                         char *d = diag;
 993                         int m = payload;
 994                         u8 *c = 4 + ftdi->response;
 995                         int s = (sizeof(diag) - 1) / 3;
 996                         diag[0] = 0;
 997                         while (s-- > 0 && m-- > 0) {
 998                                 if (s > 0 || m == 0) {
 999                                         d += sprintf(d, " %02X", *c++);
1000                                 } else
1001                                         d += sprintf(d, " ..");
1002                         }
1003                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1004                                               payload);
1005                         ftdi->received = 0;
1006                         ftdi->expected = 4;
1007                         ftdi->ed_found = 0;
1008                         b = ftdi->response;
1009                         goto have;
1010                 } else if (ftdi->expected == 8) {
1011                         u8 buscmd;
1012                         int respond_head = ftdi->respond_head++;
1013                         struct u132_respond *respond = &ftdi->respond[
1014                                 RESPOND_MASK & respond_head];
1015                         u32 data = ftdi->response[7];
1016                         data <<= 8;
1017                         data |= ftdi->response[6];
1018                         data <<= 8;
1019                         data |= ftdi->response[5];
1020                         data <<= 8;
1021                         data |= ftdi->response[4];
1022                         *respond->value = data;
1023                         *respond->result = 0;
1024                         complete(&respond->wait_completion);
1025                         ftdi->received = 0;
1026                         ftdi->expected = 4;
1027                         ftdi->ed_found = 0;
1028                         b = ftdi->response;
1029                         buscmd = (ftdi->response[0] >> 0) & 0x0F;
1030                         if (buscmd == 0x00) {
1031                         } else if (buscmd == 0x02) {
1032                         } else if (buscmd == 0x06) {
1033                         } else if (buscmd == 0x0A) {
1034                         } else
1035                                 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1036                                         buscmd, data);
1037                         goto have;
1038                 } else {
1039                         if ((ftdi->response[0] & 0x80) == 0x00) {
1040                                 ftdi->expected = 8;
1041                                 goto have;
1042                         } else {
1043                                 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1044                                 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1045                                 u16 ed_length = (ftdi->response[2] << 8) |
1046                                         ftdi->response[1];
1047                                 struct u132_target *target = &ftdi->target[
1048                                         ed_number];
1049                                 target->halted = (ftdi->response[0] >> 3) &
1050                                         0x01;
1051                                 target->skipped = (ftdi->response[0] >> 2) &
1052                                         0x01;
1053                                 target->toggle_bits = (ftdi->response[3] >> 6)
1054                                         & 0x03;
1055                                 target->error_count = (ftdi->response[3] >> 4)
1056                                         & 0x03;
1057                                 target->condition_code = (ftdi->response[
1058                                                                   3] >> 0) & 0x0F;
1059                                 if ((ftdi->response[0] & 0x10) == 0x00) {
1060                                         b = have_ed_set_response(ftdi, target,
1061                                                                  ed_length, ed_number, ed_type,
1062                                                                  b);
1063                                         goto have;
1064                                 } else {
1065                                         b = have_ed_get_response(ftdi, target,
1066                                                                  ed_length, ed_number, ed_type,
1067                                                                  b);
1068                                         goto have;
1069                                 }
1070                         }
1071                 }
1072         } else
1073                 goto more;
1074 }
1075
1076
1077 /*
1078  * create a urb, and a buffer for it, and copy the data to the urb
1079  *
1080  */
1081 static ssize_t ftdi_elan_write(struct file *file,
1082                                const char __user *user_buffer, size_t count,
1083                                loff_t *ppos)
1084 {
1085         int retval = 0;
1086         struct urb *urb;
1087         char *buf;
1088         struct usb_ftdi *ftdi = file->private_data;
1089
1090         if (ftdi->disconnected > 0) {
1091                 return -ENODEV;
1092         }
1093         if (count == 0) {
1094                 goto exit;
1095         }
1096         urb = usb_alloc_urb(0, GFP_KERNEL);
1097         if (!urb) {
1098                 retval = -ENOMEM;
1099                 goto error_1;
1100         }
1101         buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1102                                  &urb->transfer_dma);
1103         if (!buf) {
1104                 retval = -ENOMEM;
1105                 goto error_2;
1106         }
1107         if (copy_from_user(buf, user_buffer, count)) {
1108                 retval = -EFAULT;
1109                 goto error_3;
1110         }
1111         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1112                                                            ftdi->bulk_out_endpointAddr), buf, count,
1113                           ftdi_elan_write_bulk_callback, ftdi);
1114         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1115         retval = usb_submit_urb(urb, GFP_KERNEL);
1116         if (retval) {
1117                 dev_err(&ftdi->udev->dev,
1118                         "failed submitting write urb, error %d\n", retval);
1119                 goto error_3;
1120         }
1121         usb_free_urb(urb);
1122
1123 exit:
1124         return count;
1125 error_3:
1126         usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1127 error_2:
1128         usb_free_urb(urb);
1129 error_1:
1130         return retval;
1131 }
1132
1133 static const struct file_operations ftdi_elan_fops = {
1134         .owner = THIS_MODULE,
1135         .llseek = no_llseek,
1136         .read = ftdi_elan_read,
1137         .write = ftdi_elan_write,
1138         .open = ftdi_elan_open,
1139         .release = ftdi_elan_release,
1140 };
1141
1142 /*
1143  * usb class driver info in order to get a minor number from the usb core,
1144  * and to have the device registered with the driver core
1145  */
1146 static struct usb_class_driver ftdi_elan_jtag_class = {
1147         .name = "ftdi-%d-jtag",
1148         .fops = &ftdi_elan_fops,
1149         .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1150 };
1151
1152 /*
1153  * the following definitions are for the
1154  * ELAN FPGA state machgine processor that
1155  * lies on the other side of the FTDI chip
1156  */
1157 #define cPCIu132rd 0x0
1158 #define cPCIu132wr 0x1
1159 #define cPCIiord 0x2
1160 #define cPCIiowr 0x3
1161 #define cPCImemrd 0x6
1162 #define cPCImemwr 0x7
1163 #define cPCIcfgrd 0xA
1164 #define cPCIcfgwr 0xB
1165 #define cPCInull 0xF
1166 #define cU132cmd_status 0x0
1167 #define cU132flash 0x1
1168 #define cPIDsetup 0x0
1169 #define cPIDout 0x1
1170 #define cPIDin 0x2
1171 #define cPIDinonce 0x3
1172 #define cCCnoerror 0x0
1173 #define cCCcrc 0x1
1174 #define cCCbitstuff 0x2
1175 #define cCCtoggle 0x3
1176 #define cCCstall 0x4
1177 #define cCCnoresp 0x5
1178 #define cCCbadpid1 0x6
1179 #define cCCbadpid2 0x7
1180 #define cCCdataoverrun 0x8
1181 #define cCCdataunderrun 0x9
1182 #define cCCbuffoverrun 0xC
1183 #define cCCbuffunderrun 0xD
1184 #define cCCnotaccessed 0xF
1185 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1186 {
1187 wait:if (ftdi->disconnected > 0) {
1188                 return -ENODEV;
1189         } else {
1190                 int command_size;
1191                 mutex_lock(&ftdi->u132_lock);
1192                 command_size = ftdi->command_next - ftdi->command_head;
1193                 if (command_size < COMMAND_SIZE) {
1194                         struct u132_command *command = &ftdi->command[
1195                                 COMMAND_MASK & ftdi->command_next];
1196                         command->header = 0x00 | cPCIu132wr;
1197                         command->length = 0x04;
1198                         command->address = 0x00;
1199                         command->width = 0x00;
1200                         command->follows = 4;
1201                         command->value = data;
1202                         command->buffer = &command->value;
1203                         ftdi->command_next += 1;
1204                         ftdi_elan_kick_command_queue(ftdi);
1205                         mutex_unlock(&ftdi->u132_lock);
1206                         return 0;
1207                 } else {
1208                         mutex_unlock(&ftdi->u132_lock);
1209                         msleep(100);
1210                         goto wait;
1211                 }
1212         }
1213 }
1214
1215 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1216                                   u8 width, u32 data)
1217 {
1218         u8 addressofs = config_offset / 4;
1219 wait:if (ftdi->disconnected > 0) {
1220                 return -ENODEV;
1221         } else {
1222                 int command_size;
1223                 mutex_lock(&ftdi->u132_lock);
1224                 command_size = ftdi->command_next - ftdi->command_head;
1225                 if (command_size < COMMAND_SIZE) {
1226                         struct u132_command *command = &ftdi->command[
1227                                 COMMAND_MASK & ftdi->command_next];
1228                         command->header = 0x00 | (cPCIcfgwr & 0x0F);
1229                         command->length = 0x04;
1230                         command->address = addressofs;
1231                         command->width = 0x00 | (width & 0x0F);
1232                         command->follows = 4;
1233                         command->value = data;
1234                         command->buffer = &command->value;
1235                         ftdi->command_next += 1;
1236                         ftdi_elan_kick_command_queue(ftdi);
1237                         mutex_unlock(&ftdi->u132_lock);
1238                         return 0;
1239                 } else {
1240                         mutex_unlock(&ftdi->u132_lock);
1241                         msleep(100);
1242                         goto wait;
1243                 }
1244         }
1245 }
1246
1247 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1248                                   u8 width, u32 data)
1249 {
1250         u8 addressofs = mem_offset / 4;
1251 wait:if (ftdi->disconnected > 0) {
1252                 return -ENODEV;
1253         } else {
1254                 int command_size;
1255                 mutex_lock(&ftdi->u132_lock);
1256                 command_size = ftdi->command_next - ftdi->command_head;
1257                 if (command_size < COMMAND_SIZE) {
1258                         struct u132_command *command = &ftdi->command[
1259                                 COMMAND_MASK & ftdi->command_next];
1260                         command->header = 0x00 | (cPCImemwr & 0x0F);
1261                         command->length = 0x04;
1262                         command->address = addressofs;
1263                         command->width = 0x00 | (width & 0x0F);
1264                         command->follows = 4;
1265                         command->value = data;
1266                         command->buffer = &command->value;
1267                         ftdi->command_next += 1;
1268                         ftdi_elan_kick_command_queue(ftdi);
1269                         mutex_unlock(&ftdi->u132_lock);
1270                         return 0;
1271                 } else {
1272                         mutex_unlock(&ftdi->u132_lock);
1273                         msleep(100);
1274                         goto wait;
1275                 }
1276         }
1277 }
1278
1279 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1280                                u8 width, u32 data)
1281 {
1282         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1283         return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1284 }
1285
1286
1287 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1288 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1289 {
1290 wait:if (ftdi->disconnected > 0) {
1291                 return -ENODEV;
1292         } else {
1293                 int command_size;
1294                 int respond_size;
1295                 mutex_lock(&ftdi->u132_lock);
1296                 command_size = ftdi->command_next - ftdi->command_head;
1297                 respond_size = ftdi->respond_next - ftdi->respond_head;
1298                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1299                 {
1300                         struct u132_command *command = &ftdi->command[
1301                                 COMMAND_MASK & ftdi->command_next];
1302                         struct u132_respond *respond = &ftdi->respond[
1303                                 RESPOND_MASK & ftdi->respond_next];
1304                         int result = -ENODEV;
1305                         respond->result = &result;
1306                         respond->header = command->header = 0x00 | cPCIu132rd;
1307                         command->length = 0x04;
1308                         respond->address = command->address = cU132cmd_status;
1309                         command->width = 0x00;
1310                         command->follows = 0;
1311                         command->value = 0;
1312                         command->buffer = NULL;
1313                         respond->value = data;
1314                         init_completion(&respond->wait_completion);
1315                         ftdi->command_next += 1;
1316                         ftdi->respond_next += 1;
1317                         ftdi_elan_kick_command_queue(ftdi);
1318                         mutex_unlock(&ftdi->u132_lock);
1319                         wait_for_completion(&respond->wait_completion);
1320                         return result;
1321                 } else {
1322                         mutex_unlock(&ftdi->u132_lock);
1323                         msleep(100);
1324                         goto wait;
1325                 }
1326         }
1327 }
1328
1329 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1330                                  u8 width, u32 *data)
1331 {
1332         u8 addressofs = config_offset / 4;
1333 wait:if (ftdi->disconnected > 0) {
1334                 return -ENODEV;
1335         } else {
1336                 int command_size;
1337                 int respond_size;
1338                 mutex_lock(&ftdi->u132_lock);
1339                 command_size = ftdi->command_next - ftdi->command_head;
1340                 respond_size = ftdi->respond_next - ftdi->respond_head;
1341                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1342                 {
1343                         struct u132_command *command = &ftdi->command[
1344                                 COMMAND_MASK & ftdi->command_next];
1345                         struct u132_respond *respond = &ftdi->respond[
1346                                 RESPOND_MASK & ftdi->respond_next];
1347                         int result = -ENODEV;
1348                         respond->result = &result;
1349                         respond->header = command->header = 0x00 | (cPCIcfgrd &
1350                                                                     0x0F);
1351                         command->length = 0x04;
1352                         respond->address = command->address = addressofs;
1353                         command->width = 0x00 | (width & 0x0F);
1354                         command->follows = 0;
1355                         command->value = 0;
1356                         command->buffer = NULL;
1357                         respond->value = data;
1358                         init_completion(&respond->wait_completion);
1359                         ftdi->command_next += 1;
1360                         ftdi->respond_next += 1;
1361                         ftdi_elan_kick_command_queue(ftdi);
1362                         mutex_unlock(&ftdi->u132_lock);
1363                         wait_for_completion(&respond->wait_completion);
1364                         return result;
1365                 } else {
1366                         mutex_unlock(&ftdi->u132_lock);
1367                         msleep(100);
1368                         goto wait;
1369                 }
1370         }
1371 }
1372
1373 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1374                                  u8 width, u32 *data)
1375 {
1376         u8 addressofs = mem_offset / 4;
1377 wait:if (ftdi->disconnected > 0) {
1378                 return -ENODEV;
1379         } else {
1380                 int command_size;
1381                 int respond_size;
1382                 mutex_lock(&ftdi->u132_lock);
1383                 command_size = ftdi->command_next - ftdi->command_head;
1384                 respond_size = ftdi->respond_next - ftdi->respond_head;
1385                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1386                 {
1387                         struct u132_command *command = &ftdi->command[
1388                                 COMMAND_MASK & ftdi->command_next];
1389                         struct u132_respond *respond = &ftdi->respond[
1390                                 RESPOND_MASK & ftdi->respond_next];
1391                         int result = -ENODEV;
1392                         respond->result = &result;
1393                         respond->header = command->header = 0x00 | (cPCImemrd &
1394                                                                     0x0F);
1395                         command->length = 0x04;
1396                         respond->address = command->address = addressofs;
1397                         command->width = 0x00 | (width & 0x0F);
1398                         command->follows = 0;
1399                         command->value = 0;
1400                         command->buffer = NULL;
1401                         respond->value = data;
1402                         init_completion(&respond->wait_completion);
1403                         ftdi->command_next += 1;
1404                         ftdi->respond_next += 1;
1405                         ftdi_elan_kick_command_queue(ftdi);
1406                         mutex_unlock(&ftdi->u132_lock);
1407                         wait_for_completion(&respond->wait_completion);
1408                         return result;
1409                 } else {
1410                         mutex_unlock(&ftdi->u132_lock);
1411                         msleep(100);
1412                         goto wait;
1413                 }
1414         }
1415 }
1416
1417 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1418                               u8 width, u32 *data)
1419 {
1420         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1421         if (ftdi->initialized == 0) {
1422                 return -ENODEV;
1423         } else
1424                 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1425 }
1426
1427
1428 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1429 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1430                                  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1431                                  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1432                                                    int toggle_bits, int error_count, int condition_code, int repeat_number,
1433                                                    int halted, int skipped, int actual, int non_null))
1434 {
1435         u8 ed = ed_number - 1;
1436 wait:if (ftdi->disconnected > 0) {
1437                 return -ENODEV;
1438         } else if (ftdi->initialized == 0) {
1439                 return -ENODEV;
1440         } else {
1441                 int command_size;
1442                 mutex_lock(&ftdi->u132_lock);
1443                 command_size = ftdi->command_next - ftdi->command_head;
1444                 if (command_size < COMMAND_SIZE) {
1445                         struct u132_target *target = &ftdi->target[ed];
1446                         struct u132_command *command = &ftdi->command[
1447                                 COMMAND_MASK & ftdi->command_next];
1448                         command->header = 0x80 | (ed << 5);
1449                         command->length = 0x8007;
1450                         command->address = (toggle_bits << 6) | (ep_number << 2)
1451                                 | (address << 0);
1452                         command->width = usb_maxpacket(urb->dev, urb->pipe);
1453                         command->follows = 8;
1454                         command->value = 0;
1455                         command->buffer = urb->setup_packet;
1456                         target->callback = callback;
1457                         target->endp = endp;
1458                         target->urb = urb;
1459                         target->active = 1;
1460                         ftdi->command_next += 1;
1461                         ftdi_elan_kick_command_queue(ftdi);
1462                         mutex_unlock(&ftdi->u132_lock);
1463                         return 0;
1464                 } else {
1465                         mutex_unlock(&ftdi->u132_lock);
1466                         msleep(100);
1467                         goto wait;
1468                 }
1469         }
1470 }
1471
1472 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1473                               void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1474                               void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1475                                                 int toggle_bits, int error_count, int condition_code, int repeat_number,
1476                                                 int halted, int skipped, int actual, int non_null))
1477 {
1478         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1479         return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1480                                      ep_number, toggle_bits, callback);
1481 }
1482
1483
1484 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1485 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1486                                  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1487                                  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1488                                                    int toggle_bits, int error_count, int condition_code, int repeat_number,
1489                                                    int halted, int skipped, int actual, int non_null))
1490 {
1491         u8 ed = ed_number - 1;
1492 wait:if (ftdi->disconnected > 0) {
1493                 return -ENODEV;
1494         } else if (ftdi->initialized == 0) {
1495                 return -ENODEV;
1496         } else {
1497                 int command_size;
1498                 mutex_lock(&ftdi->u132_lock);
1499                 command_size = ftdi->command_next - ftdi->command_head;
1500                 if (command_size < COMMAND_SIZE) {
1501                         struct u132_target *target = &ftdi->target[ed];
1502                         struct u132_command *command = &ftdi->command[
1503                                 COMMAND_MASK & ftdi->command_next];
1504                         u32 remaining_length = urb->transfer_buffer_length -
1505                                 urb->actual_length;
1506                         command->header = 0x82 | (ed << 5);
1507                         if (remaining_length == 0) {
1508                                 command->length = 0x0000;
1509                         } else if (remaining_length > 1024) {
1510                                 command->length = 0x8000 | 1023;
1511                         } else
1512                                 command->length = 0x8000 | (remaining_length -
1513                                                             1);
1514                         command->address = (toggle_bits << 6) | (ep_number << 2)
1515                                 | (address << 0);
1516                         command->width = usb_maxpacket(urb->dev, urb->pipe);
1517                         command->follows = 0;
1518                         command->value = 0;
1519                         command->buffer = NULL;
1520                         target->callback = callback;
1521                         target->endp = endp;
1522                         target->urb = urb;
1523                         target->active = 1;
1524                         ftdi->command_next += 1;
1525                         ftdi_elan_kick_command_queue(ftdi);
1526                         mutex_unlock(&ftdi->u132_lock);
1527                         return 0;
1528                 } else {
1529                         mutex_unlock(&ftdi->u132_lock);
1530                         msleep(100);
1531                         goto wait;
1532                 }
1533         }
1534 }
1535
1536 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1537                               void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1538                               void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1539                                                 int toggle_bits, int error_count, int condition_code, int repeat_number,
1540                                                 int halted, int skipped, int actual, int non_null))
1541 {
1542         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1543         return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1544                                      ep_number, toggle_bits, callback);
1545 }
1546
1547
1548 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1549 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1550                                  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1551                                  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1552                                                    int toggle_bits, int error_count, int condition_code, int repeat_number,
1553                                                    int halted, int skipped, int actual, int non_null))
1554 {
1555         u8 ed = ed_number - 1;
1556 wait:if (ftdi->disconnected > 0) {
1557                 return -ENODEV;
1558         } else if (ftdi->initialized == 0) {
1559                 return -ENODEV;
1560         } else {
1561                 int command_size;
1562                 mutex_lock(&ftdi->u132_lock);
1563                 command_size = ftdi->command_next - ftdi->command_head;
1564                 if (command_size < COMMAND_SIZE) {
1565                         struct u132_target *target = &ftdi->target[ed];
1566                         struct u132_command *command = &ftdi->command[
1567                                 COMMAND_MASK & ftdi->command_next];
1568                         command->header = 0x81 | (ed << 5);
1569                         command->length = 0x0000;
1570                         command->address = (toggle_bits << 6) | (ep_number << 2)
1571                                 | (address << 0);
1572                         command->width = usb_maxpacket(urb->dev, urb->pipe);
1573                         command->follows = 0;
1574                         command->value = 0;
1575                         command->buffer = NULL;
1576                         target->callback = callback;
1577                         target->endp = endp;
1578                         target->urb = urb;
1579                         target->active = 1;
1580                         ftdi->command_next += 1;
1581                         ftdi_elan_kick_command_queue(ftdi);
1582                         mutex_unlock(&ftdi->u132_lock);
1583                         return 0;
1584                 } else {
1585                         mutex_unlock(&ftdi->u132_lock);
1586                         msleep(100);
1587                         goto wait;
1588                 }
1589         }
1590 }
1591
1592 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1593                               void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1594                               void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1595                                                 int toggle_bits, int error_count, int condition_code, int repeat_number,
1596                                                 int halted, int skipped, int actual, int non_null))
1597 {
1598         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1599         return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1600                                      ep_number, toggle_bits, callback);
1601 }
1602
1603
1604 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1605 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1606                                   void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1607                                   void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1608                                                     int toggle_bits, int error_count, int condition_code, int repeat_number,
1609                                                     int halted, int skipped, int actual, int non_null))
1610 {
1611         u8 ed = ed_number - 1;
1612 wait:if (ftdi->disconnected > 0) {
1613                 return -ENODEV;
1614         } else if (ftdi->initialized == 0) {
1615                 return -ENODEV;
1616         } else {
1617                 int command_size;
1618                 mutex_lock(&ftdi->u132_lock);
1619                 command_size = ftdi->command_next - ftdi->command_head;
1620                 if (command_size < COMMAND_SIZE) {
1621                         u8 *b;
1622                         u16 urb_size;
1623                         int i = 0;
1624                         char data[30 *3 + 4];
1625                         char *d = data;
1626                         int m = (sizeof(data) - 1) / 3 - 1;
1627                         struct u132_target *target = &ftdi->target[ed];
1628                         struct u132_command *command = &ftdi->command[
1629                                 COMMAND_MASK & ftdi->command_next];
1630                         command->header = 0x81 | (ed << 5);
1631                         command->address = (toggle_bits << 6) | (ep_number << 2)
1632                                 | (address << 0);
1633                         command->width = usb_maxpacket(urb->dev, urb->pipe);
1634                         command->follows = min_t(u32, 1024,
1635                                                  urb->transfer_buffer_length -
1636                                                  urb->actual_length);
1637                         command->value = 0;
1638                         command->buffer = urb->transfer_buffer +
1639                                 urb->actual_length;
1640                         command->length = 0x8000 | (command->follows - 1);
1641                         b = command->buffer;
1642                         urb_size = command->follows;
1643                         data[0] = 0;
1644                         while (urb_size-- > 0) {
1645                                 if (i > m) {
1646                                 } else if (i++ < m) {
1647                                         int w = sprintf(d, " %02X", *b++);
1648                                         d += w;
1649                                 } else
1650                                         d += sprintf(d, " ..");
1651                         }
1652                         target->callback = callback;
1653                         target->endp = endp;
1654                         target->urb = urb;
1655                         target->active = 1;
1656                         ftdi->command_next += 1;
1657                         ftdi_elan_kick_command_queue(ftdi);
1658                         mutex_unlock(&ftdi->u132_lock);
1659                         return 0;
1660                 } else {
1661                         mutex_unlock(&ftdi->u132_lock);
1662                         msleep(100);
1663                         goto wait;
1664                 }
1665         }
1666 }
1667
1668 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1669                                void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1670                                void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1671                                                  int toggle_bits, int error_count, int condition_code, int repeat_number,
1672                                                  int halted, int skipped, int actual, int non_null))
1673 {
1674         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1675         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1676                                       ep_number, toggle_bits, callback);
1677 }
1678
1679
1680 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1681 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1682                                   void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1683                                   void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1684                                                     int toggle_bits, int error_count, int condition_code, int repeat_number,
1685                                                     int halted, int skipped, int actual, int non_null))
1686 {
1687         u8 ed = ed_number - 1;
1688 wait:if (ftdi->disconnected > 0) {
1689                 return -ENODEV;
1690         } else if (ftdi->initialized == 0) {
1691                 return -ENODEV;
1692         } else {
1693                 int command_size;
1694                 mutex_lock(&ftdi->u132_lock);
1695                 command_size = ftdi->command_next - ftdi->command_head;
1696                 if (command_size < COMMAND_SIZE) {
1697                         u32 remaining_length = urb->transfer_buffer_length -
1698                                 urb->actual_length;
1699                         struct u132_target *target = &ftdi->target[ed];
1700                         struct u132_command *command = &ftdi->command[
1701                                 COMMAND_MASK & ftdi->command_next];
1702                         command->header = 0x83 | (ed << 5);
1703                         if (remaining_length == 0) {
1704                                 command->length = 0x0000;
1705                         } else if (remaining_length > 1024) {
1706                                 command->length = 0x8000 | 1023;
1707                         } else
1708                                 command->length = 0x8000 | (remaining_length -
1709                                                             1);
1710                         command->address = (toggle_bits << 6) | (ep_number << 2)
1711                                 | (address << 0);
1712                         command->width = usb_maxpacket(urb->dev, urb->pipe);
1713                         command->follows = 0;
1714                         command->value = 0;
1715                         command->buffer = NULL;
1716                         target->callback = callback;
1717                         target->endp = endp;
1718                         target->urb = urb;
1719                         target->active = 1;
1720                         ftdi->command_next += 1;
1721                         ftdi_elan_kick_command_queue(ftdi);
1722                         mutex_unlock(&ftdi->u132_lock);
1723                         return 0;
1724                 } else {
1725                         mutex_unlock(&ftdi->u132_lock);
1726                         msleep(100);
1727                         goto wait;
1728                 }
1729         }
1730 }
1731
1732 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1733                                void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1734                                void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1735                                                  int toggle_bits, int error_count, int condition_code, int repeat_number,
1736                                                  int halted, int skipped, int actual, int non_null))
1737 {
1738         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1739         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1740                                       ep_number, toggle_bits, callback);
1741 }
1742
1743
1744 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1745 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1746                                  void *endp)
1747 {
1748         u8 ed = ed_number - 1;
1749         if (ftdi->disconnected > 0) {
1750                 return -ENODEV;
1751         } else if (ftdi->initialized == 0) {
1752                 return -ENODEV;
1753         } else {
1754                 struct u132_target *target = &ftdi->target[ed];
1755                 mutex_lock(&ftdi->u132_lock);
1756                 if (target->abandoning > 0) {
1757                         mutex_unlock(&ftdi->u132_lock);
1758                         return 0;
1759                 } else {
1760                         target->abandoning = 1;
1761                 wait_1:if (target->active == 1) {
1762                                 int command_size = ftdi->command_next -
1763                                         ftdi->command_head;
1764                                 if (command_size < COMMAND_SIZE) {
1765                                         struct u132_command *command =
1766                                                 &ftdi->command[COMMAND_MASK &
1767                                                                ftdi->command_next];
1768                                         command->header = 0x80 | (ed << 5) |
1769                                                 0x4;
1770                                         command->length = 0x00;
1771                                         command->address = 0x00;
1772                                         command->width = 0x00;
1773                                         command->follows = 0;
1774                                         command->value = 0;
1775                                         command->buffer = &command->value;
1776                                         ftdi->command_next += 1;
1777                                         ftdi_elan_kick_command_queue(ftdi);
1778                                 } else {
1779                                         mutex_unlock(&ftdi->u132_lock);
1780                                         msleep(100);
1781                                         mutex_lock(&ftdi->u132_lock);
1782                                         goto wait_1;
1783                                 }
1784                         }
1785                         mutex_unlock(&ftdi->u132_lock);
1786                         return 0;
1787                 }
1788         }
1789 }
1790
1791 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1792                               void *endp)
1793 {
1794         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1795         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1796 }
1797
1798
1799 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1800 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1801 {
1802         int retry_on_empty = 10;
1803         int retry_on_timeout = 5;
1804         int retry_on_status = 20;
1805 more:{
1806                 int packet_bytes = 0;
1807                 int retval = usb_bulk_msg(ftdi->udev,
1808                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1809                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1810                                           &packet_bytes, 100);
1811                 if (packet_bytes > 2) {
1812                         char diag[30 *3 + 4];
1813                         char *d = diag;
1814                         int m = (sizeof(diag) - 1) / 3 - 1;
1815                         char *b = ftdi->bulk_in_buffer;
1816                         int bytes_read = 0;
1817                         diag[0] = 0;
1818                         while (packet_bytes-- > 0) {
1819                                 char c = *b++;
1820                                 if (bytes_read < m) {
1821                                         d += sprintf(d, " %02X",
1822                                                      0x000000FF & c);
1823                                 } else if (bytes_read > m) {
1824                                 } else
1825                                         d += sprintf(d, " ..");
1826                                 bytes_read += 1;
1827                                 continue;
1828                         }
1829                         goto more;
1830                 } else if (packet_bytes > 1) {
1831                         char s1 = ftdi->bulk_in_buffer[0];
1832                         char s2 = ftdi->bulk_in_buffer[1];
1833                         if (s1 == 0x31 && s2 == 0x60) {
1834                                 return 0;
1835                         } else if (retry_on_status-- > 0) {
1836                                 goto more;
1837                         } else {
1838                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1839                                 return -EFAULT;
1840                         }
1841                 } else if (packet_bytes > 0) {
1842                         char b1 = ftdi->bulk_in_buffer[0];
1843                         dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1844                                 b1);
1845                         if (retry_on_status-- > 0) {
1846                                 goto more;
1847                         } else {
1848                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1849                                 return -EFAULT;
1850                         }
1851                 } else if (retval == -ETIMEDOUT) {
1852                         if (retry_on_timeout-- > 0) {
1853                                 goto more;
1854                         } else {
1855                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1856                                 return -ENOMEM;
1857                         }
1858                 } else if (retval == 0) {
1859                         if (retry_on_empty-- > 0) {
1860                                 goto more;
1861                         } else {
1862                                 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1863                                 return -ENOMEM;
1864                         }
1865                 } else {
1866                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1867                         return retval;
1868                 }
1869         }
1870         return -1;
1871 }
1872
1873
1874 /*
1875  * send the long flush sequence
1876  *
1877  */
1878 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1879 {
1880         int retval;
1881         struct urb *urb;
1882         char *buf;
1883         int I = 257;
1884         int i = 0;
1885         urb = usb_alloc_urb(0, GFP_KERNEL);
1886         if (!urb)
1887                 return -ENOMEM;
1888         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1889         if (!buf) {
1890                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1891                 usb_free_urb(urb);
1892                 return -ENOMEM;
1893         }
1894         while (I-- > 0)
1895                 buf[i++] = 0x55;
1896         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1897                                                            ftdi->bulk_out_endpointAddr), buf, i,
1898                           ftdi_elan_write_bulk_callback, ftdi);
1899         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1900         retval = usb_submit_urb(urb, GFP_KERNEL);
1901         if (retval) {
1902                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1903                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1904                 usb_free_urb(urb);
1905                 return -ENOMEM;
1906         }
1907         usb_free_urb(urb);
1908         return 0;
1909 }
1910
1911
1912 /*
1913  * send the reset sequence
1914  *
1915  */
1916 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1917 {
1918         int retval;
1919         struct urb *urb;
1920         char *buf;
1921         int I = 4;
1922         int i = 0;
1923         urb = usb_alloc_urb(0, GFP_KERNEL);
1924         if (!urb)
1925                 return -ENOMEM;
1926         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1927         if (!buf) {
1928                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1929                 usb_free_urb(urb);
1930                 return -ENOMEM;
1931         }
1932         buf[i++] = 0x55;
1933         buf[i++] = 0xAA;
1934         buf[i++] = 0x5A;
1935         buf[i++] = 0xA5;
1936         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1937                                                            ftdi->bulk_out_endpointAddr), buf, i,
1938                           ftdi_elan_write_bulk_callback, ftdi);
1939         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1940         retval = usb_submit_urb(urb, GFP_KERNEL);
1941         if (retval) {
1942                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
1943                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1944                 usb_free_urb(urb);
1945                 return -ENOMEM;
1946         }
1947         usb_free_urb(urb);
1948         return 0;
1949 }
1950
1951 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
1952 {
1953         int retval;
1954         int long_stop = 10;
1955         int retry_on_timeout = 5;
1956         int retry_on_empty = 10;
1957         retval = ftdi_elan_flush_input_fifo(ftdi);
1958         if (retval)
1959                 return retval;
1960         ftdi->bulk_in_left = 0;
1961         ftdi->bulk_in_last = -1;
1962         while (long_stop-- > 0) {
1963                 int read_stop;
1964                 int read_stuck;
1965                 retval = ftdi_elan_synchronize_flush(ftdi);
1966                 if (retval)
1967                         return retval;
1968                 retval = ftdi_elan_flush_input_fifo(ftdi);
1969                 if (retval)
1970                         return retval;
1971         reset:retval = ftdi_elan_synchronize_reset(ftdi);
1972                 if (retval)
1973                         return retval;
1974                 read_stop = 100;
1975                 read_stuck = 10;
1976         read:{
1977                         int packet_bytes = 0;
1978                         retval = usb_bulk_msg(ftdi->udev,
1979                                               usb_rcvbulkpipe(ftdi->udev,
1980                                                               ftdi->bulk_in_endpointAddr),
1981                                               ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1982                                               &packet_bytes, 500);
1983                         if (packet_bytes > 2) {
1984                                 char diag[30 *3 + 4];
1985                                 char *d = diag;
1986                                 int m = (sizeof(diag) - 1) / 3 - 1;
1987                                 char *b = ftdi->bulk_in_buffer;
1988                                 int bytes_read = 0;
1989                                 unsigned char c = 0;
1990                                 diag[0] = 0;
1991                                 while (packet_bytes-- > 0) {
1992                                         c = *b++;
1993                                         if (bytes_read < m) {
1994                                                 d += sprintf(d, " %02X", c);
1995                                         } else if (bytes_read > m) {
1996                                         } else
1997                                                 d += sprintf(d, " ..");
1998                                         bytes_read += 1;
1999                                         continue;
2000                                 }
2001                                 if (c == 0x7E) {
2002                                         return 0;
2003                                 } else {
2004                                         if (c == 0x55) {
2005                                                 goto read;
2006                                         } else if (read_stop-- > 0) {
2007                                                 goto read;
2008                                         } else {
2009                                                 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2010                                                 continue;
2011                                         }
2012                                 }
2013                         } else if (packet_bytes > 1) {
2014                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2015                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2016                                 if (s1 == 0x31 && s2 == 0x00) {
2017                                         if (read_stuck-- > 0) {
2018                                                 goto read;
2019                                         } else
2020                                                 goto reset;
2021                                 } else {
2022                                         if (read_stop-- > 0) {
2023                                                 goto read;
2024                                         } else {
2025                                                 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2026                                                 continue;
2027                                         }
2028                                 }
2029                         } else if (packet_bytes > 0) {
2030                                 if (read_stop-- > 0) {
2031                                         goto read;
2032                                 } else {
2033                                         dev_err(&ftdi->udev->dev, "retry limit reached\n");
2034                                         continue;
2035                                 }
2036                         } else if (retval == -ETIMEDOUT) {
2037                                 if (retry_on_timeout-- > 0) {
2038                                         goto read;
2039                                 } else {
2040                                         dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2041                                         continue;
2042                                 }
2043                         } else if (retval == 0) {
2044                                 if (retry_on_empty-- > 0) {
2045                                         goto read;
2046                                 } else {
2047                                         dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2048                                         continue;
2049                                 }
2050                         } else {
2051                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2052                                         retval);
2053                                 if (read_stop-- > 0) {
2054                                         goto read;
2055                                 } else {
2056                                         dev_err(&ftdi->udev->dev, "retry limit reached\n");
2057                                         continue;
2058                                 }
2059                         }
2060                 }
2061         }
2062         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2063         return -EFAULT;
2064 }
2065
2066 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2067 {
2068         int retry_on_empty = 10;
2069         int retry_on_timeout = 5;
2070         int retry_on_status = 50;
2071 more:{
2072                 int packet_bytes = 0;
2073                 int retval = usb_bulk_msg(ftdi->udev,
2074                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2075                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2076                                           &packet_bytes, 1000);
2077                 if (packet_bytes > 2) {
2078                         char diag[30 *3 + 4];
2079                         char *d = diag;
2080                         int m = (sizeof(diag) - 1) / 3 - 1;
2081                         char *b = ftdi->bulk_in_buffer;
2082                         int bytes_read = 0;
2083                         diag[0] = 0;
2084                         while (packet_bytes-- > 0) {
2085                                 char c = *b++;
2086                                 if (bytes_read < m) {
2087                                         d += sprintf(d, " %02X",
2088                                                      0x000000FF & c);
2089                                 } else if (bytes_read > m) {
2090                                 } else
2091                                         d += sprintf(d, " ..");
2092                                 bytes_read += 1;
2093                         }
2094                         goto more;
2095                 } else if (packet_bytes > 1) {
2096                         char s1 = ftdi->bulk_in_buffer[0];
2097                         char s2 = ftdi->bulk_in_buffer[1];
2098                         if (s1 == 0x31 && s2 == 0x60) {
2099                                 return 0;
2100                         } else if (retry_on_status-- > 0) {
2101                                 msleep(5);
2102                                 goto more;
2103                         } else
2104                                 return -EFAULT;
2105                 } else if (packet_bytes > 0) {
2106                         char b1 = ftdi->bulk_in_buffer[0];
2107                         dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2108                         if (retry_on_status-- > 0) {
2109                                 msleep(5);
2110                                 goto more;
2111                         } else {
2112                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2113                                 return -EFAULT;
2114                         }
2115                 } else if (retval == -ETIMEDOUT) {
2116                         if (retry_on_timeout-- > 0) {
2117                                 goto more;
2118                         } else {
2119                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2120                                 return -ENOMEM;
2121                         }
2122                 } else if (retval == 0) {
2123                         if (retry_on_empty-- > 0) {
2124                                 goto more;
2125                         } else {
2126                                 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2127                                 return -ENOMEM;
2128                         }
2129                 } else {
2130                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2131                         return -ENOMEM;
2132                 }
2133         }
2134         return -1;
2135 }
2136
2137 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2138 {
2139         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2140         if (UxxxStatus)
2141                 return UxxxStatus;
2142         if (ftdi->controlreg & 0x00400000) {
2143                 if (ftdi->card_ejected) {
2144                 } else {
2145                         ftdi->card_ejected = 1;
2146                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2147                                 ftdi->controlreg);
2148                 }
2149                 return -ENODEV;
2150         } else {
2151                 u8 fn = ftdi->function - 1;
2152                 int activePCIfn = fn << 8;
2153                 u32 pcidata;
2154                 u32 pciVID;
2155                 u32 pciPID;
2156                 int reg = 0;
2157                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2158                                                    &pcidata);
2159                 if (UxxxStatus)
2160                         return UxxxStatus;
2161                 pciVID = pcidata & 0xFFFF;
2162                 pciPID = (pcidata >> 16) & 0xFFFF;
2163                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2164                     ftdi->platform_data.device) {
2165                         return 0;
2166                 } else {
2167                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2168                                 ftdi->platform_data.vendor, pciVID,
2169                                 ftdi->platform_data.device, pciPID);
2170                         return -ENODEV;
2171                 }
2172         }
2173 }
2174
2175
2176 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2177                                                                    offsetof(struct ohci_regs, member), 0, data);
2178 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2179                                                                      offsetof(struct ohci_regs, member), 0, data);
2180
2181 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2182 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD |   \
2183                         OHCI_INTR_WDH)
2184 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2185 {
2186         int devices = 0;
2187         int retval;
2188         u32 hc_control;
2189         int num_ports;
2190         u32 control;
2191         u32 rh_a = -1;
2192         u32 status;
2193         u32 fminterval;
2194         u32 hc_fminterval;
2195         u32 periodicstart;
2196         u32 cmdstatus;
2197         u32 roothub_a;
2198         int mask = OHCI_INTR_INIT;
2199         int sleep_time = 0;
2200         int reset_timeout = 30;        /* ... allow extra time */
2201         int temp;
2202         retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2203         if (retval)
2204                 return retval;
2205         retval = ftdi_read_pcimem(ftdi, control, &control);
2206         if (retval)
2207                 return retval;
2208         retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2209         if (retval)
2210                 return retval;
2211         num_ports = rh_a & RH_A_NDP;
2212         retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2213         if (retval)
2214                 return retval;
2215         hc_fminterval &= 0x3fff;
2216         if (hc_fminterval != FI) {
2217         }
2218         hc_fminterval |= FSMP(hc_fminterval) << 16;
2219         retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2220         if (retval)
2221                 return retval;
2222         switch (hc_control & OHCI_CTRL_HCFS) {
2223         case OHCI_USB_OPER:
2224                 sleep_time = 0;
2225                 break;
2226         case OHCI_USB_SUSPEND:
2227         case OHCI_USB_RESUME:
2228                 hc_control &= OHCI_CTRL_RWC;
2229                 hc_control |= OHCI_USB_RESUME;
2230                 sleep_time = 10;
2231                 break;
2232         default:
2233                 hc_control &= OHCI_CTRL_RWC;
2234                 hc_control |= OHCI_USB_RESET;
2235                 sleep_time = 50;
2236                 break;
2237         }
2238         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2239         if (retval)
2240                 return retval;
2241         retval = ftdi_read_pcimem(ftdi, control, &control);
2242         if (retval)
2243                 return retval;
2244         msleep(sleep_time);
2245         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2246         if (retval)
2247                 return retval;
2248         if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2249                 for (temp = 0; temp < num_ports; temp++) {
2250                         retval = ftdi_write_pcimem(ftdi,
2251                                                    roothub.portstatus[temp], RH_PS_LSDA);
2252                         if (retval)
2253                                 return retval;
2254                 }
2255         }
2256         retval = ftdi_read_pcimem(ftdi, control, &control);
2257         if (retval)
2258                 return retval;
2259 retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2260         if (retval)
2261                 return retval;
2262         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2263         if (retval)
2264                 return retval;
2265 extra:{
2266                 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2267                 if (retval)
2268                         return retval;
2269                 if (0 != (status & OHCI_HCR)) {
2270                         if (--reset_timeout == 0) {
2271                                 dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2272                                 return -ENODEV;
2273                         } else {
2274                                 msleep(5);
2275                                 goto extra;
2276                         }
2277                 }
2278         }
2279         if (quirk & OHCI_QUIRK_INITRESET) {
2280                 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2281                 if (retval)
2282                         return retval;
2283                 retval = ftdi_read_pcimem(ftdi, control, &control);
2284                 if (retval)
2285                         return retval;
2286         }
2287         retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2288         if (retval)
2289                 return retval;
2290         retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2291         if (retval)
2292                 return retval;
2293         retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2294         if (retval)
2295                 return retval;
2296         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2297         if (retval)
2298                 return retval;
2299         retval = ftdi_write_pcimem(ftdi, fminterval,
2300                                    ((fminterval & FIT) ^ FIT) | hc_fminterval);
2301         if (retval)
2302                 return retval;
2303         retval = ftdi_write_pcimem(ftdi, periodicstart,
2304                                    ((9 *hc_fminterval) / 10) & 0x3fff);
2305         if (retval)
2306                 return retval;
2307         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2308         if (retval)
2309                 return retval;
2310         retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2311         if (retval)
2312                 return retval;
2313         if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2314                 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2315                         quirk |= OHCI_QUIRK_INITRESET;
2316                         goto retry;
2317                 } else
2318                         dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2319                                 fminterval, periodicstart);
2320         }                        /* start controller operations */
2321         hc_control &= OHCI_CTRL_RWC;
2322         hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2323         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2324         if (retval)
2325                 return retval;
2326         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2327         if (retval)
2328                 return retval;
2329         retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2330         if (retval)
2331                 return retval;
2332         retval = ftdi_read_pcimem(ftdi, control, &control);
2333         if (retval)
2334                 return retval;
2335         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2336         if (retval)
2337                 return retval;
2338         retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2339         if (retval)
2340                 return retval;
2341         retval = ftdi_write_pcimem(ftdi, intrdisable,
2342                                    OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2343                                    OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2344                                    OHCI_INTR_SO);
2345         if (retval)
2346                 return retval;        /* handle root hub init quirks ... */
2347         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2348         if (retval)
2349                 return retval;
2350         roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2351         if (quirk & OHCI_QUIRK_SUPERIO) {
2352                 roothub_a |= RH_A_NOCP;
2353                 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2354                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2355                 if (retval)
2356                         return retval;
2357         } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2358                 roothub_a |= RH_A_NPS;
2359                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2360                 if (retval)
2361                         return retval;
2362         }
2363         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2364         if (retval)
2365                 return retval;
2366         retval = ftdi_write_pcimem(ftdi, roothub.b,
2367                                    (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2368         if (retval)
2369                 return retval;
2370         retval = ftdi_read_pcimem(ftdi, control, &control);
2371         if (retval)
2372                 return retval;
2373         mdelay((roothub_a >> 23) & 0x1fe);
2374         for (temp = 0; temp < num_ports; temp++) {
2375                 u32 portstatus;
2376                 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2377                                           &portstatus);
2378                 if (retval)
2379                         return retval;
2380                 if (1 & portstatus)
2381                         devices += 1;
2382         }
2383         return devices;
2384 }
2385
2386 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2387 {
2388         u32 latence_timer;
2389         int UxxxStatus;
2390         u32 pcidata;
2391         int reg = 0;
2392         int activePCIfn = fn << 8;
2393         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2394         if (UxxxStatus)
2395                 return UxxxStatus;
2396         reg = 16;
2397         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2398                                             0xFFFFFFFF);
2399         if (UxxxStatus)
2400                 return UxxxStatus;
2401         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2402                                            &pcidata);
2403         if (UxxxStatus)
2404                 return UxxxStatus;
2405         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2406                                             0xF0000000);
2407         if (UxxxStatus)
2408                 return UxxxStatus;
2409         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2410                                            &pcidata);
2411         if (UxxxStatus)
2412                 return UxxxStatus;
2413         reg = 12;
2414         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2415                                            &latence_timer);
2416         if (UxxxStatus)
2417                 return UxxxStatus;
2418         latence_timer &= 0xFFFF00FF;
2419         latence_timer |= 0x00001600;
2420         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2421                                             latence_timer);
2422         if (UxxxStatus)
2423                 return UxxxStatus;
2424         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2425                                            &pcidata);
2426         if (UxxxStatus)
2427                 return UxxxStatus;
2428         reg = 4;
2429         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2430                                             0x06);
2431         if (UxxxStatus)
2432                 return UxxxStatus;
2433         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2434                                            &pcidata);
2435         if (UxxxStatus)
2436                 return UxxxStatus;
2437         for (reg = 0; reg <= 0x54; reg += 4) {
2438                 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2439                 if (UxxxStatus)
2440                         return UxxxStatus;
2441         }
2442         return 0;
2443 }
2444
2445 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2446 {
2447         u32 latence_timer;
2448         int UxxxStatus;
2449         u32 pcidata;
2450         int reg = 0;
2451         int activePCIfn = fn << 8;
2452         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2453         if (UxxxStatus)
2454                 return UxxxStatus;
2455         reg = 16;
2456         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2457                                             0xFFFFFFFF);
2458         if (UxxxStatus)
2459                 return UxxxStatus;
2460         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2461                                            &pcidata);
2462         if (UxxxStatus)
2463                 return UxxxStatus;
2464         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2465                                             0x00000000);
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 = 12;
2473         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2474                                            &latence_timer);
2475         if (UxxxStatus)
2476                 return UxxxStatus;
2477         latence_timer &= 0xFFFF00FF;
2478         latence_timer |= 0x00001600;
2479         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2480                                             latence_timer);
2481         if (UxxxStatus)
2482                 return UxxxStatus;
2483         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2484                                            &pcidata);
2485         if (UxxxStatus)
2486                 return UxxxStatus;
2487         reg = 4;
2488         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2489                                             0x00);
2490         if (UxxxStatus)
2491                 return UxxxStatus;
2492         return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2493 }
2494
2495 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2496 {
2497         int result;
2498         int UxxxStatus;
2499         UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2500         if (UxxxStatus)
2501                 return UxxxStatus;
2502         result = ftdi_elan_check_controller(ftdi, quirk);
2503         UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2504         if (UxxxStatus)
2505                 return UxxxStatus;
2506         return result;
2507 }
2508
2509 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2510 {
2511         u32 controlreg;
2512         u8 sensebits;
2513         int UxxxStatus;
2514         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2515         if (UxxxStatus)
2516                 return UxxxStatus;
2517         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2518         if (UxxxStatus)
2519                 return UxxxStatus;
2520         msleep(750);
2521         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2522         if (UxxxStatus)
2523                 return UxxxStatus;
2524         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2525         if (UxxxStatus)
2526                 return UxxxStatus;
2527         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2528         if (UxxxStatus)
2529                 return UxxxStatus;
2530         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2531         if (UxxxStatus)
2532                 return UxxxStatus;
2533         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2534         if (UxxxStatus)
2535                 return UxxxStatus;
2536         msleep(250);
2537         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2538         if (UxxxStatus)
2539                 return UxxxStatus;
2540         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2541         if (UxxxStatus)
2542                 return UxxxStatus;
2543         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2544         if (UxxxStatus)
2545                 return UxxxStatus;
2546         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2547         if (UxxxStatus)
2548                 return UxxxStatus;
2549         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2550         if (UxxxStatus)
2551                 return UxxxStatus;
2552         msleep(1000);
2553         sensebits = (controlreg >> 16) & 0x000F;
2554         if (0x0D == sensebits)
2555                 return 0;
2556         else
2557                 return - ENXIO;
2558 }
2559
2560 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2561 {
2562         int UxxxStatus;
2563         u32 pcidata;
2564         int reg = 0;
2565         u8 fn;
2566         int activePCIfn = 0;
2567         int max_devices = 0;
2568         int controllers = 0;
2569         int unrecognized = 0;
2570         ftdi->function = 0;
2571         for (fn = 0; (fn < 4); fn++) {
2572                 u32 pciVID = 0;
2573                 u32 pciPID = 0;
2574                 int devices = 0;
2575                 activePCIfn = fn << 8;
2576                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2577                                                    &pcidata);
2578                 if (UxxxStatus)
2579                         return UxxxStatus;
2580                 pciVID = pcidata & 0xFFFF;
2581                 pciPID = (pcidata >> 16) & 0xFFFF;
2582                 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2583                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2584                         controllers += 1;
2585                 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2586                 {
2587                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2588                         controllers += 1;
2589                 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2590                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2591                         controllers += 1;
2592                 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2593                 {
2594                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2595                         controllers += 1;
2596                 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2597                         devices = ftdi_elan_found_controller(ftdi, fn,
2598                                                              OHCI_QUIRK_AMD756);
2599                         controllers += 1;
2600                 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2601                         devices = ftdi_elan_found_controller(ftdi, fn,
2602                                                              OHCI_QUIRK_ZFMICRO);
2603                         controllers += 1;
2604                 } else if (0 == pcidata) {
2605                 } else
2606                         unrecognized += 1;
2607                 if (devices > max_devices) {
2608                         max_devices = devices;
2609                         ftdi->function = fn + 1;
2610                         ftdi->platform_data.vendor = pciVID;
2611                         ftdi->platform_data.device = pciPID;
2612                 }
2613         }
2614         if (ftdi->function > 0) {
2615                 return ftdi_elan_setup_controller(ftdi, ftdi->function - 1);
2616         } else if (controllers > 0) {
2617                 return -ENXIO;
2618         } else if (unrecognized > 0) {
2619                 return -ENXIO;
2620         } else {
2621                 ftdi->enumerated = 0;
2622                 return -ENXIO;
2623         }
2624 }
2625
2626
2627 /*
2628  * we use only the first bulk-in and bulk-out endpoints
2629  */
2630 static int ftdi_elan_probe(struct usb_interface *interface,
2631                            const struct usb_device_id *id)
2632 {
2633         struct usb_host_interface *iface_desc;
2634         struct usb_endpoint_descriptor *bulk_in, *bulk_out;
2635         int retval;
2636         struct usb_ftdi *ftdi;
2637
2638         ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2639         if (!ftdi)
2640                 return -ENOMEM;
2641
2642         mutex_lock(&ftdi_module_lock);
2643         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2644         ftdi->sequence_num = ++ftdi_instances;
2645         mutex_unlock(&ftdi_module_lock);
2646         ftdi_elan_init_kref(ftdi);
2647         sema_init(&ftdi->sw_lock, 1);
2648         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2649         ftdi->interface = interface;
2650         mutex_init(&ftdi->u132_lock);
2651         ftdi->expected = 4;
2652
2653         iface_desc = interface->cur_altsetting;
2654         retval = usb_find_common_endpoints(iface_desc,
2655                         &bulk_in, &bulk_out, NULL, NULL);
2656         if (retval) {
2657                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2658                 goto error;
2659         }
2660
2661         ftdi->bulk_in_size = usb_endpoint_maxp(bulk_in);
2662         ftdi->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
2663         ftdi->bulk_in_buffer = kmalloc(ftdi->bulk_in_size, GFP_KERNEL);
2664         if (!ftdi->bulk_in_buffer) {
2665                 retval = -ENOMEM;
2666                 goto error;
2667         }
2668
2669         ftdi->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
2670
2671         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2672                  iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2673                  ftdi->bulk_out_endpointAddr);
2674         usb_set_intfdata(interface, ftdi);
2675         if (iface_desc->desc.bInterfaceNumber == 0 &&
2676             ftdi->bulk_in_endpointAddr == 0x81 &&
2677             ftdi->bulk_out_endpointAddr == 0x02) {
2678                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2679                 if (retval) {
2680                         dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2681                         usb_set_intfdata(interface, NULL);
2682                         retval = -ENOMEM;
2683                         goto error;
2684                 } else {
2685                         ftdi->class = &ftdi_elan_jtag_class;
2686                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2687                                  ftdi, iface_desc->desc.bInterfaceNumber,
2688                                  interface->minor);
2689                         return 0;
2690                 }
2691         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2692                    ftdi->bulk_in_endpointAddr == 0x83 &&
2693                    ftdi->bulk_out_endpointAddr == 0x04) {
2694                 ftdi->class = NULL;
2695                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2696                          ftdi, iface_desc->desc.bInterfaceNumber);
2697                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2698                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2699                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2700                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2701                 return 0;
2702         } else {
2703                 dev_err(&ftdi->udev->dev,
2704                         "Could not find ELAN's U132 device\n");
2705                 retval = -ENODEV;
2706                 goto error;
2707         }
2708 error:if (ftdi) {
2709                 ftdi_elan_put_kref(ftdi);
2710         }
2711         return retval;
2712 }
2713
2714 static void ftdi_elan_disconnect(struct usb_interface *interface)
2715 {
2716         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2717         ftdi->disconnected += 1;
2718         if (ftdi->class) {
2719                 int minor = interface->minor;
2720                 struct usb_class_driver *class = ftdi->class;
2721                 usb_set_intfdata(interface, NULL);
2722                 usb_deregister_dev(interface, class);
2723                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2724                          minor);
2725         } else {
2726                 ftdi_status_cancel_work(ftdi);
2727                 ftdi_command_cancel_work(ftdi);
2728                 ftdi_response_cancel_work(ftdi);
2729                 ftdi_elan_abandon_completions(ftdi);
2730                 ftdi_elan_abandon_targets(ftdi);
2731                 if (ftdi->registered) {
2732                         platform_device_unregister(&ftdi->platform_dev);
2733                         ftdi->synchronized = 0;
2734                         ftdi->enumerated = 0;
2735                         ftdi->initialized = 0;
2736                         ftdi->registered = 0;
2737                 }
2738                 ftdi->disconnected += 1;
2739                 usb_set_intfdata(interface, NULL);
2740                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2741         }
2742         ftdi_elan_put_kref(ftdi);
2743 }
2744
2745 static struct usb_driver ftdi_elan_driver = {
2746         .name = "ftdi-elan",
2747         .probe = ftdi_elan_probe,
2748         .disconnect = ftdi_elan_disconnect,
2749         .id_table = ftdi_elan_table,
2750 };
2751 static int __init ftdi_elan_init(void)
2752 {
2753         int result;
2754         pr_info("driver %s\n", ftdi_elan_driver.name);
2755         mutex_init(&ftdi_module_lock);
2756         INIT_LIST_HEAD(&ftdi_static_list);
2757         result = usb_register(&ftdi_elan_driver);
2758         if (result) {
2759                 pr_err("usb_register failed. Error number %d\n", result);
2760         }
2761         return result;
2762
2763 }
2764
2765 static void __exit ftdi_elan_exit(void)
2766 {
2767         struct usb_ftdi *ftdi;
2768         struct usb_ftdi *temp;
2769         usb_deregister(&ftdi_elan_driver);
2770         pr_info("ftdi_u132 driver deregistered\n");
2771         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2772                 ftdi_status_cancel_work(ftdi);
2773                 ftdi_command_cancel_work(ftdi);
2774                 ftdi_response_cancel_work(ftdi);
2775         }
2776 }
2777
2778
2779 module_init(ftdi_elan_init);
2780 module_exit(ftdi_elan_exit);