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                         int l = 0;
1628                         struct u132_target *target = &ftdi->target[ed];
1629                         struct u132_command *command = &ftdi->command[
1630                                 COMMAND_MASK & ftdi->command_next];
1631                         command->header = 0x81 | (ed << 5);
1632                         command->address = (toggle_bits << 6) | (ep_number << 2)
1633                                 | (address << 0);
1634                         command->width = usb_maxpacket(urb->dev, urb->pipe);
1635                         command->follows = min_t(u32, 1024,
1636                                                  urb->transfer_buffer_length -
1637                                                  urb->actual_length);
1638                         command->value = 0;
1639                         command->buffer = urb->transfer_buffer +
1640                                 urb->actual_length;
1641                         command->length = 0x8000 | (command->follows - 1);
1642                         b = command->buffer;
1643                         urb_size = command->follows;
1644                         data[0] = 0;
1645                         while (urb_size-- > 0) {
1646                                 if (i > m) {
1647                                 } else if (i++ < m) {
1648                                         int w = sprintf(d, " %02X", *b++);
1649                                         d += w;
1650                                         l += w;
1651                                 } else
1652                                         d += sprintf(d, " ..");
1653                         }
1654                         target->callback = callback;
1655                         target->endp = endp;
1656                         target->urb = urb;
1657                         target->active = 1;
1658                         ftdi->command_next += 1;
1659                         ftdi_elan_kick_command_queue(ftdi);
1660                         mutex_unlock(&ftdi->u132_lock);
1661                         return 0;
1662                 } else {
1663                         mutex_unlock(&ftdi->u132_lock);
1664                         msleep(100);
1665                         goto wait;
1666                 }
1667         }
1668 }
1669
1670 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1671                                void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1672                                void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1673                                                  int toggle_bits, int error_count, int condition_code, int repeat_number,
1674                                                  int halted, int skipped, int actual, int non_null))
1675 {
1676         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1677         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1678                                       ep_number, toggle_bits, callback);
1679 }
1680
1681
1682 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1683 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1684                                   void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1685                                   void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1686                                                     int toggle_bits, int error_count, int condition_code, int repeat_number,
1687                                                     int halted, int skipped, int actual, int non_null))
1688 {
1689         u8 ed = ed_number - 1;
1690 wait:if (ftdi->disconnected > 0) {
1691                 return -ENODEV;
1692         } else if (ftdi->initialized == 0) {
1693                 return -ENODEV;
1694         } else {
1695                 int command_size;
1696                 mutex_lock(&ftdi->u132_lock);
1697                 command_size = ftdi->command_next - ftdi->command_head;
1698                 if (command_size < COMMAND_SIZE) {
1699                         u32 remaining_length = urb->transfer_buffer_length -
1700                                 urb->actual_length;
1701                         struct u132_target *target = &ftdi->target[ed];
1702                         struct u132_command *command = &ftdi->command[
1703                                 COMMAND_MASK & ftdi->command_next];
1704                         command->header = 0x83 | (ed << 5);
1705                         if (remaining_length == 0) {
1706                                 command->length = 0x0000;
1707                         } else if (remaining_length > 1024) {
1708                                 command->length = 0x8000 | 1023;
1709                         } else
1710                                 command->length = 0x8000 | (remaining_length -
1711                                                             1);
1712                         command->address = (toggle_bits << 6) | (ep_number << 2)
1713                                 | (address << 0);
1714                         command->width = usb_maxpacket(urb->dev, urb->pipe);
1715                         command->follows = 0;
1716                         command->value = 0;
1717                         command->buffer = NULL;
1718                         target->callback = callback;
1719                         target->endp = endp;
1720                         target->urb = urb;
1721                         target->active = 1;
1722                         ftdi->command_next += 1;
1723                         ftdi_elan_kick_command_queue(ftdi);
1724                         mutex_unlock(&ftdi->u132_lock);
1725                         return 0;
1726                 } else {
1727                         mutex_unlock(&ftdi->u132_lock);
1728                         msleep(100);
1729                         goto wait;
1730                 }
1731         }
1732 }
1733
1734 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1735                                void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1736                                void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1737                                                  int toggle_bits, int error_count, int condition_code, int repeat_number,
1738                                                  int halted, int skipped, int actual, int non_null))
1739 {
1740         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1741         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1742                                       ep_number, toggle_bits, callback);
1743 }
1744
1745
1746 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1747 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1748                                  void *endp)
1749 {
1750         u8 ed = ed_number - 1;
1751         if (ftdi->disconnected > 0) {
1752                 return -ENODEV;
1753         } else if (ftdi->initialized == 0) {
1754                 return -ENODEV;
1755         } else {
1756                 struct u132_target *target = &ftdi->target[ed];
1757                 mutex_lock(&ftdi->u132_lock);
1758                 if (target->abandoning > 0) {
1759                         mutex_unlock(&ftdi->u132_lock);
1760                         return 0;
1761                 } else {
1762                         target->abandoning = 1;
1763                 wait_1:if (target->active == 1) {
1764                                 int command_size = ftdi->command_next -
1765                                         ftdi->command_head;
1766                                 if (command_size < COMMAND_SIZE) {
1767                                         struct u132_command *command =
1768                                                 &ftdi->command[COMMAND_MASK &
1769                                                                ftdi->command_next];
1770                                         command->header = 0x80 | (ed << 5) |
1771                                                 0x4;
1772                                         command->length = 0x00;
1773                                         command->address = 0x00;
1774                                         command->width = 0x00;
1775                                         command->follows = 0;
1776                                         command->value = 0;
1777                                         command->buffer = &command->value;
1778                                         ftdi->command_next += 1;
1779                                         ftdi_elan_kick_command_queue(ftdi);
1780                                 } else {
1781                                         mutex_unlock(&ftdi->u132_lock);
1782                                         msleep(100);
1783                                         mutex_lock(&ftdi->u132_lock);
1784                                         goto wait_1;
1785                                 }
1786                         }
1787                         mutex_unlock(&ftdi->u132_lock);
1788                         return 0;
1789                 }
1790         }
1791 }
1792
1793 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1794                               void *endp)
1795 {
1796         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1797         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1798 }
1799
1800
1801 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1802 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1803 {
1804         int retry_on_empty = 10;
1805         int retry_on_timeout = 5;
1806         int retry_on_status = 20;
1807 more:{
1808                 int packet_bytes = 0;
1809                 int retval = usb_bulk_msg(ftdi->udev,
1810                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1811                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1812                                           &packet_bytes, 100);
1813                 if (packet_bytes > 2) {
1814                         char diag[30 *3 + 4];
1815                         char *d = diag;
1816                         int m = (sizeof(diag) - 1) / 3 - 1;
1817                         char *b = ftdi->bulk_in_buffer;
1818                         int bytes_read = 0;
1819                         diag[0] = 0;
1820                         while (packet_bytes-- > 0) {
1821                                 char c = *b++;
1822                                 if (bytes_read < m) {
1823                                         d += sprintf(d, " %02X",
1824                                                      0x000000FF & c);
1825                                 } else if (bytes_read > m) {
1826                                 } else
1827                                         d += sprintf(d, " ..");
1828                                 bytes_read += 1;
1829                                 continue;
1830                         }
1831                         goto more;
1832                 } else if (packet_bytes > 1) {
1833                         char s1 = ftdi->bulk_in_buffer[0];
1834                         char s2 = ftdi->bulk_in_buffer[1];
1835                         if (s1 == 0x31 && s2 == 0x60) {
1836                                 return 0;
1837                         } else if (retry_on_status-- > 0) {
1838                                 goto more;
1839                         } else {
1840                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1841                                 return -EFAULT;
1842                         }
1843                 } else if (packet_bytes > 0) {
1844                         char b1 = ftdi->bulk_in_buffer[0];
1845                         dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1846                                 b1);
1847                         if (retry_on_status-- > 0) {
1848                                 goto more;
1849                         } else {
1850                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1851                                 return -EFAULT;
1852                         }
1853                 } else if (retval == -ETIMEDOUT) {
1854                         if (retry_on_timeout-- > 0) {
1855                                 goto more;
1856                         } else {
1857                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1858                                 return -ENOMEM;
1859                         }
1860                 } else if (retval == 0) {
1861                         if (retry_on_empty-- > 0) {
1862                                 goto more;
1863                         } else {
1864                                 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1865                                 return -ENOMEM;
1866                         }
1867                 } else {
1868                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1869                         return retval;
1870                 }
1871         }
1872         return -1;
1873 }
1874
1875
1876 /*
1877  * send the long flush sequence
1878  *
1879  */
1880 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1881 {
1882         int retval;
1883         struct urb *urb;
1884         char *buf;
1885         int I = 257;
1886         int i = 0;
1887         urb = usb_alloc_urb(0, GFP_KERNEL);
1888         if (!urb)
1889                 return -ENOMEM;
1890         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1891         if (!buf) {
1892                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1893                 usb_free_urb(urb);
1894                 return -ENOMEM;
1895         }
1896         while (I-- > 0)
1897                 buf[i++] = 0x55;
1898         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1899                                                            ftdi->bulk_out_endpointAddr), buf, i,
1900                           ftdi_elan_write_bulk_callback, ftdi);
1901         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1902         retval = usb_submit_urb(urb, GFP_KERNEL);
1903         if (retval) {
1904                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1905                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1906                 usb_free_urb(urb);
1907                 return -ENOMEM;
1908         }
1909         usb_free_urb(urb);
1910         return 0;
1911 }
1912
1913
1914 /*
1915  * send the reset sequence
1916  *
1917  */
1918 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1919 {
1920         int retval;
1921         struct urb *urb;
1922         char *buf;
1923         int I = 4;
1924         int i = 0;
1925         urb = usb_alloc_urb(0, GFP_KERNEL);
1926         if (!urb)
1927                 return -ENOMEM;
1928         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1929         if (!buf) {
1930                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1931                 usb_free_urb(urb);
1932                 return -ENOMEM;
1933         }
1934         buf[i++] = 0x55;
1935         buf[i++] = 0xAA;
1936         buf[i++] = 0x5A;
1937         buf[i++] = 0xA5;
1938         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1939                                                            ftdi->bulk_out_endpointAddr), buf, i,
1940                           ftdi_elan_write_bulk_callback, ftdi);
1941         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1942         retval = usb_submit_urb(urb, GFP_KERNEL);
1943         if (retval) {
1944                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
1945                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1946                 usb_free_urb(urb);
1947                 return -ENOMEM;
1948         }
1949         usb_free_urb(urb);
1950         return 0;
1951 }
1952
1953 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
1954 {
1955         int retval;
1956         int long_stop = 10;
1957         int retry_on_timeout = 5;
1958         int retry_on_empty = 10;
1959         int err_count = 0;
1960         retval = ftdi_elan_flush_input_fifo(ftdi);
1961         if (retval)
1962                 return retval;
1963         ftdi->bulk_in_left = 0;
1964         ftdi->bulk_in_last = -1;
1965         while (long_stop-- > 0) {
1966                 int read_stop;
1967                 int read_stuck;
1968                 retval = ftdi_elan_synchronize_flush(ftdi);
1969                 if (retval)
1970                         return retval;
1971                 retval = ftdi_elan_flush_input_fifo(ftdi);
1972                 if (retval)
1973                         return retval;
1974         reset:retval = ftdi_elan_synchronize_reset(ftdi);
1975                 if (retval)
1976                         return retval;
1977                 read_stop = 100;
1978                 read_stuck = 10;
1979         read:{
1980                         int packet_bytes = 0;
1981                         retval = usb_bulk_msg(ftdi->udev,
1982                                               usb_rcvbulkpipe(ftdi->udev,
1983                                                               ftdi->bulk_in_endpointAddr),
1984                                               ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1985                                               &packet_bytes, 500);
1986                         if (packet_bytes > 2) {
1987                                 char diag[30 *3 + 4];
1988                                 char *d = diag;
1989                                 int m = (sizeof(diag) - 1) / 3 - 1;
1990                                 char *b = ftdi->bulk_in_buffer;
1991                                 int bytes_read = 0;
1992                                 unsigned char c = 0;
1993                                 diag[0] = 0;
1994                                 while (packet_bytes-- > 0) {
1995                                         c = *b++;
1996                                         if (bytes_read < m) {
1997                                                 d += sprintf(d, " %02X", c);
1998                                         } else if (bytes_read > m) {
1999                                         } else
2000                                                 d += sprintf(d, " ..");
2001                                         bytes_read += 1;
2002                                         continue;
2003                                 }
2004                                 if (c == 0x7E) {
2005                                         return 0;
2006                                 } else {
2007                                         if (c == 0x55) {
2008                                                 goto read;
2009                                         } else if (read_stop-- > 0) {
2010                                                 goto read;
2011                                         } else {
2012                                                 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2013                                                 continue;
2014                                         }
2015                                 }
2016                         } else if (packet_bytes > 1) {
2017                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2018                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2019                                 if (s1 == 0x31 && s2 == 0x00) {
2020                                         if (read_stuck-- > 0) {
2021                                                 goto read;
2022                                         } else
2023                                                 goto reset;
2024                                 } else {
2025                                         if (read_stop-- > 0) {
2026                                                 goto read;
2027                                         } else {
2028                                                 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2029                                                 continue;
2030                                         }
2031                                 }
2032                         } else if (packet_bytes > 0) {
2033                                 if (read_stop-- > 0) {
2034                                         goto read;
2035                                 } else {
2036                                         dev_err(&ftdi->udev->dev, "retry limit reached\n");
2037                                         continue;
2038                                 }
2039                         } else if (retval == -ETIMEDOUT) {
2040                                 if (retry_on_timeout-- > 0) {
2041                                         goto read;
2042                                 } else {
2043                                         dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2044                                         continue;
2045                                 }
2046                         } else if (retval == 0) {
2047                                 if (retry_on_empty-- > 0) {
2048                                         goto read;
2049                                 } else {
2050                                         dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2051                                         continue;
2052                                 }
2053                         } else {
2054                                 err_count += 1;
2055                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2056                                         retval);
2057                                 if (read_stop-- > 0) {
2058                                         goto read;
2059                                 } else {
2060                                         dev_err(&ftdi->udev->dev, "retry limit reached\n");
2061                                         continue;
2062                                 }
2063                         }
2064                 }
2065         }
2066         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2067         return -EFAULT;
2068 }
2069
2070 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2071 {
2072         int retry_on_empty = 10;
2073         int retry_on_timeout = 5;
2074         int retry_on_status = 50;
2075 more:{
2076                 int packet_bytes = 0;
2077                 int retval = usb_bulk_msg(ftdi->udev,
2078                                           usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2079                                           ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2080                                           &packet_bytes, 1000);
2081                 if (packet_bytes > 2) {
2082                         char diag[30 *3 + 4];
2083                         char *d = diag;
2084                         int m = (sizeof(diag) - 1) / 3 - 1;
2085                         char *b = ftdi->bulk_in_buffer;
2086                         int bytes_read = 0;
2087                         diag[0] = 0;
2088                         while (packet_bytes-- > 0) {
2089                                 char c = *b++;
2090                                 if (bytes_read < m) {
2091                                         d += sprintf(d, " %02X",
2092                                                      0x000000FF & c);
2093                                 } else if (bytes_read > m) {
2094                                 } else
2095                                         d += sprintf(d, " ..");
2096                                 bytes_read += 1;
2097                         }
2098                         goto more;
2099                 } else if (packet_bytes > 1) {
2100                         char s1 = ftdi->bulk_in_buffer[0];
2101                         char s2 = ftdi->bulk_in_buffer[1];
2102                         if (s1 == 0x31 && s2 == 0x60) {
2103                                 return 0;
2104                         } else if (retry_on_status-- > 0) {
2105                                 msleep(5);
2106                                 goto more;
2107                         } else
2108                                 return -EFAULT;
2109                 } else if (packet_bytes > 0) {
2110                         char b1 = ftdi->bulk_in_buffer[0];
2111                         dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2112                         if (retry_on_status-- > 0) {
2113                                 msleep(5);
2114                                 goto more;
2115                         } else {
2116                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2117                                 return -EFAULT;
2118                         }
2119                 } else if (retval == -ETIMEDOUT) {
2120                         if (retry_on_timeout-- > 0) {
2121                                 goto more;
2122                         } else {
2123                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2124                                 return -ENOMEM;
2125                         }
2126                 } else if (retval == 0) {
2127                         if (retry_on_empty-- > 0) {
2128                                 goto more;
2129                         } else {
2130                                 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2131                                 return -ENOMEM;
2132                         }
2133                 } else {
2134                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2135                         return -ENOMEM;
2136                 }
2137         }
2138         return -1;
2139 }
2140
2141 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2142 {
2143         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2144         if (UxxxStatus)
2145                 return UxxxStatus;
2146         if (ftdi->controlreg & 0x00400000) {
2147                 if (ftdi->card_ejected) {
2148                 } else {
2149                         ftdi->card_ejected = 1;
2150                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2151                                 ftdi->controlreg);
2152                 }
2153                 return -ENODEV;
2154         } else {
2155                 u8 fn = ftdi->function - 1;
2156                 int activePCIfn = fn << 8;
2157                 u32 pcidata;
2158                 u32 pciVID;
2159                 u32 pciPID;
2160                 int reg = 0;
2161                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2162                                                    &pcidata);
2163                 if (UxxxStatus)
2164                         return UxxxStatus;
2165                 pciVID = pcidata & 0xFFFF;
2166                 pciPID = (pcidata >> 16) & 0xFFFF;
2167                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2168                     ftdi->platform_data.device) {
2169                         return 0;
2170                 } else {
2171                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2172                                 ftdi->platform_data.vendor, pciVID,
2173                                 ftdi->platform_data.device, pciPID);
2174                         return -ENODEV;
2175                 }
2176         }
2177 }
2178
2179
2180 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2181                                                                    offsetof(struct ohci_regs, member), 0, data);
2182 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2183                                                                      offsetof(struct ohci_regs, member), 0, data);
2184
2185 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2186 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD |   \
2187                         OHCI_INTR_WDH)
2188 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2189 {
2190         int devices = 0;
2191         int retval;
2192         u32 hc_control;
2193         int num_ports;
2194         u32 control;
2195         u32 rh_a = -1;
2196         u32 status;
2197         u32 fminterval;
2198         u32 hc_fminterval;
2199         u32 periodicstart;
2200         u32 cmdstatus;
2201         u32 roothub_a;
2202         int mask = OHCI_INTR_INIT;
2203         int sleep_time = 0;
2204         int reset_timeout = 30;        /* ... allow extra time */
2205         int temp;
2206         retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2207         if (retval)
2208                 return retval;
2209         retval = ftdi_read_pcimem(ftdi, control, &control);
2210         if (retval)
2211                 return retval;
2212         retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2213         if (retval)
2214                 return retval;
2215         num_ports = rh_a & RH_A_NDP;
2216         retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2217         if (retval)
2218                 return retval;
2219         hc_fminterval &= 0x3fff;
2220         if (hc_fminterval != FI) {
2221         }
2222         hc_fminterval |= FSMP(hc_fminterval) << 16;
2223         retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2224         if (retval)
2225                 return retval;
2226         switch (hc_control & OHCI_CTRL_HCFS) {
2227         case OHCI_USB_OPER:
2228                 sleep_time = 0;
2229                 break;
2230         case OHCI_USB_SUSPEND:
2231         case OHCI_USB_RESUME:
2232                 hc_control &= OHCI_CTRL_RWC;
2233                 hc_control |= OHCI_USB_RESUME;
2234                 sleep_time = 10;
2235                 break;
2236         default:
2237                 hc_control &= OHCI_CTRL_RWC;
2238                 hc_control |= OHCI_USB_RESET;
2239                 sleep_time = 50;
2240                 break;
2241         }
2242         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2243         if (retval)
2244                 return retval;
2245         retval = ftdi_read_pcimem(ftdi, control, &control);
2246         if (retval)
2247                 return retval;
2248         msleep(sleep_time);
2249         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2250         if (retval)
2251                 return retval;
2252         if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2253                 for (temp = 0; temp < num_ports; temp++) {
2254                         retval = ftdi_write_pcimem(ftdi,
2255                                                    roothub.portstatus[temp], RH_PS_LSDA);
2256                         if (retval)
2257                                 return retval;
2258                 }
2259         }
2260         retval = ftdi_read_pcimem(ftdi, control, &control);
2261         if (retval)
2262                 return retval;
2263 retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2264         if (retval)
2265                 return retval;
2266         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2267         if (retval)
2268                 return retval;
2269 extra:{
2270                 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2271                 if (retval)
2272                         return retval;
2273                 if (0 != (status & OHCI_HCR)) {
2274                         if (--reset_timeout == 0) {
2275                                 dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2276                                 return -ENODEV;
2277                         } else {
2278                                 msleep(5);
2279                                 goto extra;
2280                         }
2281                 }
2282         }
2283         if (quirk & OHCI_QUIRK_INITRESET) {
2284                 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2285                 if (retval)
2286                         return retval;
2287                 retval = ftdi_read_pcimem(ftdi, control, &control);
2288                 if (retval)
2289                         return retval;
2290         }
2291         retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2292         if (retval)
2293                 return retval;
2294         retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2295         if (retval)
2296                 return retval;
2297         retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2298         if (retval)
2299                 return retval;
2300         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2301         if (retval)
2302                 return retval;
2303         retval = ftdi_write_pcimem(ftdi, fminterval,
2304                                    ((fminterval & FIT) ^ FIT) | hc_fminterval);
2305         if (retval)
2306                 return retval;
2307         retval = ftdi_write_pcimem(ftdi, periodicstart,
2308                                    ((9 *hc_fminterval) / 10) & 0x3fff);
2309         if (retval)
2310                 return retval;
2311         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2312         if (retval)
2313                 return retval;
2314         retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2315         if (retval)
2316                 return retval;
2317         if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2318                 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2319                         quirk |= OHCI_QUIRK_INITRESET;
2320                         goto retry;
2321                 } else
2322                         dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2323                                 fminterval, periodicstart);
2324         }                        /* start controller operations */
2325         hc_control &= OHCI_CTRL_RWC;
2326         hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2327         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2328         if (retval)
2329                 return retval;
2330         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2331         if (retval)
2332                 return retval;
2333         retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2334         if (retval)
2335                 return retval;
2336         retval = ftdi_read_pcimem(ftdi, control, &control);
2337         if (retval)
2338                 return retval;
2339         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2340         if (retval)
2341                 return retval;
2342         retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2343         if (retval)
2344                 return retval;
2345         retval = ftdi_write_pcimem(ftdi, intrdisable,
2346                                    OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2347                                    OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2348                                    OHCI_INTR_SO);
2349         if (retval)
2350                 return retval;        /* handle root hub init quirks ... */
2351         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2352         if (retval)
2353                 return retval;
2354         roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2355         if (quirk & OHCI_QUIRK_SUPERIO) {
2356                 roothub_a |= RH_A_NOCP;
2357                 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2358                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2359                 if (retval)
2360                         return retval;
2361         } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2362                 roothub_a |= RH_A_NPS;
2363                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2364                 if (retval)
2365                         return retval;
2366         }
2367         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2368         if (retval)
2369                 return retval;
2370         retval = ftdi_write_pcimem(ftdi, roothub.b,
2371                                    (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2372         if (retval)
2373                 return retval;
2374         retval = ftdi_read_pcimem(ftdi, control, &control);
2375         if (retval)
2376                 return retval;
2377         mdelay((roothub_a >> 23) & 0x1fe);
2378         for (temp = 0; temp < num_ports; temp++) {
2379                 u32 portstatus;
2380                 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2381                                           &portstatus);
2382                 if (retval)
2383                         return retval;
2384                 if (1 & portstatus)
2385                         devices += 1;
2386         }
2387         return devices;
2388 }
2389
2390 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2391 {
2392         u32 latence_timer;
2393         int UxxxStatus;
2394         u32 pcidata;
2395         int reg = 0;
2396         int activePCIfn = fn << 8;
2397         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2398         if (UxxxStatus)
2399                 return UxxxStatus;
2400         reg = 16;
2401         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2402                                             0xFFFFFFFF);
2403         if (UxxxStatus)
2404                 return UxxxStatus;
2405         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2406                                            &pcidata);
2407         if (UxxxStatus)
2408                 return UxxxStatus;
2409         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2410                                             0xF0000000);
2411         if (UxxxStatus)
2412                 return UxxxStatus;
2413         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2414                                            &pcidata);
2415         if (UxxxStatus)
2416                 return UxxxStatus;
2417         reg = 12;
2418         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2419                                            &latence_timer);
2420         if (UxxxStatus)
2421                 return UxxxStatus;
2422         latence_timer &= 0xFFFF00FF;
2423         latence_timer |= 0x00001600;
2424         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2425                                             latence_timer);
2426         if (UxxxStatus)
2427                 return UxxxStatus;
2428         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2429                                            &pcidata);
2430         if (UxxxStatus)
2431                 return UxxxStatus;
2432         reg = 4;
2433         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2434                                             0x06);
2435         if (UxxxStatus)
2436                 return UxxxStatus;
2437         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2438                                            &pcidata);
2439         if (UxxxStatus)
2440                 return UxxxStatus;
2441         for (reg = 0; reg <= 0x54; reg += 4) {
2442                 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2443                 if (UxxxStatus)
2444                         return UxxxStatus;
2445         }
2446         return 0;
2447 }
2448
2449 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2450 {
2451         u32 latence_timer;
2452         int UxxxStatus;
2453         u32 pcidata;
2454         int reg = 0;
2455         int activePCIfn = fn << 8;
2456         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2457         if (UxxxStatus)
2458                 return UxxxStatus;
2459         reg = 16;
2460         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2461                                             0xFFFFFFFF);
2462         if (UxxxStatus)
2463                 return UxxxStatus;
2464         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2465                                            &pcidata);
2466         if (UxxxStatus)
2467                 return UxxxStatus;
2468         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2469                                             0x00000000);
2470         if (UxxxStatus)
2471                 return UxxxStatus;
2472         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2473                                            &pcidata);
2474         if (UxxxStatus)
2475                 return UxxxStatus;
2476         reg = 12;
2477         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2478                                            &latence_timer);
2479         if (UxxxStatus)
2480                 return UxxxStatus;
2481         latence_timer &= 0xFFFF00FF;
2482         latence_timer |= 0x00001600;
2483         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2484                                             latence_timer);
2485         if (UxxxStatus)
2486                 return UxxxStatus;
2487         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2488                                            &pcidata);
2489         if (UxxxStatus)
2490                 return UxxxStatus;
2491         reg = 4;
2492         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2493                                             0x00);
2494         if (UxxxStatus)
2495                 return UxxxStatus;
2496         return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2497 }
2498
2499 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2500 {
2501         int result;
2502         int UxxxStatus;
2503         UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2504         if (UxxxStatus)
2505                 return UxxxStatus;
2506         result = ftdi_elan_check_controller(ftdi, quirk);
2507         UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2508         if (UxxxStatus)
2509                 return UxxxStatus;
2510         return result;
2511 }
2512
2513 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2514 {
2515         u32 controlreg;
2516         u8 sensebits;
2517         int UxxxStatus;
2518         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2519         if (UxxxStatus)
2520                 return UxxxStatus;
2521         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2522         if (UxxxStatus)
2523                 return UxxxStatus;
2524         msleep(750);
2525         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2526         if (UxxxStatus)
2527                 return UxxxStatus;
2528         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2529         if (UxxxStatus)
2530                 return UxxxStatus;
2531         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2532         if (UxxxStatus)
2533                 return UxxxStatus;
2534         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2535         if (UxxxStatus)
2536                 return UxxxStatus;
2537         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2538         if (UxxxStatus)
2539                 return UxxxStatus;
2540         msleep(250);
2541         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2542         if (UxxxStatus)
2543                 return UxxxStatus;
2544         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2545         if (UxxxStatus)
2546                 return UxxxStatus;
2547         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2548         if (UxxxStatus)
2549                 return UxxxStatus;
2550         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2551         if (UxxxStatus)
2552                 return UxxxStatus;
2553         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2554         if (UxxxStatus)
2555                 return UxxxStatus;
2556         msleep(1000);
2557         sensebits = (controlreg >> 16) & 0x000F;
2558         if (0x0D == sensebits)
2559                 return 0;
2560         else
2561                 return - ENXIO;
2562 }
2563
2564 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2565 {
2566         int UxxxStatus;
2567         u32 pcidata;
2568         int reg = 0;
2569         u8 fn;
2570         int activePCIfn = 0;
2571         int max_devices = 0;
2572         int controllers = 0;
2573         int unrecognized = 0;
2574         ftdi->function = 0;
2575         for (fn = 0; (fn < 4); fn++) {
2576                 u32 pciVID = 0;
2577                 u32 pciPID = 0;
2578                 int devices = 0;
2579                 activePCIfn = fn << 8;
2580                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2581                                                    &pcidata);
2582                 if (UxxxStatus)
2583                         return UxxxStatus;
2584                 pciVID = pcidata & 0xFFFF;
2585                 pciPID = (pcidata >> 16) & 0xFFFF;
2586                 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2587                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2588                         controllers += 1;
2589                 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2590                 {
2591                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2592                         controllers += 1;
2593                 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2594                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2595                         controllers += 1;
2596                 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2597                 {
2598                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2599                         controllers += 1;
2600                 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2601                         devices = ftdi_elan_found_controller(ftdi, fn,
2602                                                              OHCI_QUIRK_AMD756);
2603                         controllers += 1;
2604                 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2605                         devices = ftdi_elan_found_controller(ftdi, fn,
2606                                                              OHCI_QUIRK_ZFMICRO);
2607                         controllers += 1;
2608                 } else if (0 == pcidata) {
2609                 } else
2610                         unrecognized += 1;
2611                 if (devices > max_devices) {
2612                         max_devices = devices;
2613                         ftdi->function = fn + 1;
2614                         ftdi->platform_data.vendor = pciVID;
2615                         ftdi->platform_data.device = pciPID;
2616                 }
2617         }
2618         if (ftdi->function > 0) {
2619                 return ftdi_elan_setup_controller(ftdi, ftdi->function - 1);
2620         } else if (controllers > 0) {
2621                 return -ENXIO;
2622         } else if (unrecognized > 0) {
2623                 return -ENXIO;
2624         } else {
2625                 ftdi->enumerated = 0;
2626                 return -ENXIO;
2627         }
2628 }
2629
2630
2631 /*
2632  * we use only the first bulk-in and bulk-out endpoints
2633  */
2634 static int ftdi_elan_probe(struct usb_interface *interface,
2635                            const struct usb_device_id *id)
2636 {
2637         struct usb_host_interface *iface_desc;
2638         struct usb_endpoint_descriptor *bulk_in, *bulk_out;
2639         int retval;
2640         struct usb_ftdi *ftdi;
2641
2642         ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2643         if (!ftdi)
2644                 return -ENOMEM;
2645
2646         mutex_lock(&ftdi_module_lock);
2647         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2648         ftdi->sequence_num = ++ftdi_instances;
2649         mutex_unlock(&ftdi_module_lock);
2650         ftdi_elan_init_kref(ftdi);
2651         sema_init(&ftdi->sw_lock, 1);
2652         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2653         ftdi->interface = interface;
2654         mutex_init(&ftdi->u132_lock);
2655         ftdi->expected = 4;
2656
2657         iface_desc = interface->cur_altsetting;
2658         retval = usb_find_common_endpoints(iface_desc,
2659                         &bulk_in, &bulk_out, NULL, NULL);
2660         if (retval) {
2661                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2662                 goto error;
2663         }
2664
2665         ftdi->bulk_in_size = usb_endpoint_maxp(bulk_in);
2666         ftdi->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
2667         ftdi->bulk_in_buffer = kmalloc(ftdi->bulk_in_size, GFP_KERNEL);
2668         if (!ftdi->bulk_in_buffer) {
2669                 retval = -ENOMEM;
2670                 goto error;
2671         }
2672
2673         ftdi->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
2674
2675         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2676                  iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2677                  ftdi->bulk_out_endpointAddr);
2678         usb_set_intfdata(interface, ftdi);
2679         if (iface_desc->desc.bInterfaceNumber == 0 &&
2680             ftdi->bulk_in_endpointAddr == 0x81 &&
2681             ftdi->bulk_out_endpointAddr == 0x02) {
2682                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2683                 if (retval) {
2684                         dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2685                         usb_set_intfdata(interface, NULL);
2686                         retval = -ENOMEM;
2687                         goto error;
2688                 } else {
2689                         ftdi->class = &ftdi_elan_jtag_class;
2690                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2691                                  ftdi, iface_desc->desc.bInterfaceNumber,
2692                                  interface->minor);
2693                         return 0;
2694                 }
2695         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2696                    ftdi->bulk_in_endpointAddr == 0x83 &&
2697                    ftdi->bulk_out_endpointAddr == 0x04) {
2698                 ftdi->class = NULL;
2699                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2700                          ftdi, iface_desc->desc.bInterfaceNumber);
2701                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2702                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2703                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2704                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2705                 return 0;
2706         } else {
2707                 dev_err(&ftdi->udev->dev,
2708                         "Could not find ELAN's U132 device\n");
2709                 retval = -ENODEV;
2710                 goto error;
2711         }
2712 error:if (ftdi) {
2713                 ftdi_elan_put_kref(ftdi);
2714         }
2715         return retval;
2716 }
2717
2718 static void ftdi_elan_disconnect(struct usb_interface *interface)
2719 {
2720         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2721         ftdi->disconnected += 1;
2722         if (ftdi->class) {
2723                 int minor = interface->minor;
2724                 struct usb_class_driver *class = ftdi->class;
2725                 usb_set_intfdata(interface, NULL);
2726                 usb_deregister_dev(interface, class);
2727                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2728                          minor);
2729         } else {
2730                 ftdi_status_cancel_work(ftdi);
2731                 ftdi_command_cancel_work(ftdi);
2732                 ftdi_response_cancel_work(ftdi);
2733                 ftdi_elan_abandon_completions(ftdi);
2734                 ftdi_elan_abandon_targets(ftdi);
2735                 if (ftdi->registered) {
2736                         platform_device_unregister(&ftdi->platform_dev);
2737                         ftdi->synchronized = 0;
2738                         ftdi->enumerated = 0;
2739                         ftdi->initialized = 0;
2740                         ftdi->registered = 0;
2741                 }
2742                 ftdi->disconnected += 1;
2743                 usb_set_intfdata(interface, NULL);
2744                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2745         }
2746         ftdi_elan_put_kref(ftdi);
2747 }
2748
2749 static struct usb_driver ftdi_elan_driver = {
2750         .name = "ftdi-elan",
2751         .probe = ftdi_elan_probe,
2752         .disconnect = ftdi_elan_disconnect,
2753         .id_table = ftdi_elan_table,
2754 };
2755 static int __init ftdi_elan_init(void)
2756 {
2757         int result;
2758         pr_info("driver %s\n", ftdi_elan_driver.name);
2759         mutex_init(&ftdi_module_lock);
2760         INIT_LIST_HEAD(&ftdi_static_list);
2761         result = usb_register(&ftdi_elan_driver);
2762         if (result) {
2763                 pr_err("usb_register failed. Error number %d\n", result);
2764         }
2765         return result;
2766
2767 }
2768
2769 static void __exit ftdi_elan_exit(void)
2770 {
2771         struct usb_ftdi *ftdi;
2772         struct usb_ftdi *temp;
2773         usb_deregister(&ftdi_elan_driver);
2774         pr_info("ftdi_u132 driver deregistered\n");
2775         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2776                 ftdi_status_cancel_work(ftdi);
2777                 ftdi_command_cancel_work(ftdi);
2778                 ftdi_response_cancel_work(ftdi);
2779         }
2780 }
2781
2782
2783 module_init(ftdi_elan_init);
2784 module_exit(ftdi_elan_exit);