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