Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/usb/misc/ftdi-elan.c

  1 /*
  2 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
  3 *
  4 * Copyright(C) 2006 Elan Digital Systems Limited
  5 * http://www.elandigitalsystems.com
  6 *
  7 * Author and Maintainer - Tony Olech - Elan Digital Systems
  8 * tony.olech@elandigitalsystems.com
  9 *
 10 * This program is free software;you can redistribute it and/or
 11 * modify it under the terms of the GNU General Public License as
 12 * published by the Free Software Foundation, version 2.
 13 *
 14 *
 15 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
 16 * based on various USB client drivers in the 2.6.15 linux kernel
 17 * with constant reference to the 3rd Edition of Linux Device Drivers
 18 * published by O'Reilly
 19 *
 20 * The U132 adapter is a USB to CardBus adapter specifically designed
 21 * for PC cards that contain an OHCI host controller. Typical PC cards
 22 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
 23 *
 24 * The U132 adapter will *NOT *work with PC cards that do not contain
 25 * an OHCI controller. A simple way to test whether a PC card has an
 26 * OHCI controller as an interface is to insert the PC card directly
 27 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
 28 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
 29 * then there is a good chance that the U132 adapter will support the
 30 * PC card.(you also need the specific client driver for the PC card)
 31 *
 32 * Please inform the Author and Maintainer about any PC cards that
 33 * contain OHCI Host Controller and work when directly connected to
 34 * an embedded CardBus slot but do not work when they are connected
 35 * via an ELAN U132 adapter.
 36 *
 37 */
 38 #include <linux/kernel.h>
 39 #include <linux/errno.h>
 40 #include <linux/init.h>
 41 #include <linux/list.h>
 42 #include <linux/ioctl.h>
 43 #include <linux/pci_ids.h>
 44 #include <linux/slab.h>
 45 #include <linux/module.h>
 46 #include <linux/kref.h>
 47 #include <linux/mutex.h>
 48 #include <asm/uaccess.h>
 49 #include <linux/usb.h>
 50 #include <linux/workqueue.h>
 51 #include <linux/platform_device.h>
 52 MODULE_AUTHOR("Tony Olech");
 53 MODULE_DESCRIPTION("FTDI ELAN driver");
 54 MODULE_LICENSE("GPL");
 55 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
 56 static bool distrust_firmware = 1;
 57 module_param(distrust_firmware, bool, 0);
 58 MODULE_PARM_DESC(distrust_firmware, "true to distrust firmware power/overcurren"
 59         "t setup");
 60 extern struct platform_driver u132_platform_driver;
 61 static struct workqueue_struct *status_queue;
 62 static struct workqueue_struct *command_queue;
 63 static struct workqueue_struct *respond_queue;
 64 /*
 65 * ftdi_module_lock exists to protect access to global variables
 66 *
 67 */
 68 static struct mutex ftdi_module_lock;
 69 static int ftdi_instances = 0;
 70 static struct list_head ftdi_static_list;
 71 /*
 72 * end of the global variables protected by ftdi_module_lock
 73 */
 74 #include "usb_u132.h"
 75 #include <asm/io.h>
 76 #include <linux/usb/hcd.h>
 77 
 78         /* FIXME ohci.h is ONLY for internal use by the OHCI driver.
 79          * If you're going to try stuff like this, you need to split
 80          * out shareable stuff (register declarations?) into its own
 81          * file, maybe name <linux/usb/ohci.h>
 82          */
 83 
 84 #include "../host/ohci.h"
 85 /* Define these values to match your devices*/
 86 #define USB_FTDI_ELAN_VENDOR_ID 0x0403
 87 #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
 88 /* table of devices that work with this driver*/
 89 static const struct usb_device_id ftdi_elan_table[] = {
 90         {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
 91         { /* Terminating entry */ }
 92 };
 93 
 94 MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
 95 /* only the jtag(firmware upgrade device) interface requires
 96 * a device file and corresponding minor number, but the
 97 * interface is created unconditionally - I suppose it could
 98 * be configured or not according to a module parameter.
 99 * But since we(now) require one interface per device,
100 * and since it unlikely that a normal installation would
101 * require more than a couple of elan-ftdi devices, 8 seems
102 * like a reasonable limit to have here, and if someone
103 * really requires more than 8 devices, then they can frig the
104 * code and recompile
105 */
106 #define USB_FTDI_ELAN_MINOR_BASE 192
107 #define COMMAND_BITS 5
108 #define COMMAND_SIZE (1<<COMMAND_BITS)
109 #define COMMAND_MASK (COMMAND_SIZE-1)
110 struct u132_command {
111         u8 header;
112         u16 length;
113         u8 address;
114         u8 width;
115         u32 value;
116         int follows;
117         void *buffer;
118 };
119 #define RESPOND_BITS 5
120 #define RESPOND_SIZE (1<<RESPOND_BITS)
121 #define RESPOND_MASK (RESPOND_SIZE-1)
122 struct u132_respond {
123         u8 header;
124         u8 address;
125         u32 *value;
126         int *result;
127         struct completion wait_completion;
128 };
129 struct u132_target {
130         void *endp;
131         struct urb *urb;
132         int toggle_bits;
133         int error_count;
134         int condition_code;
135         int repeat_number;
136         int halted;
137         int skipped;
138         int actual;
139         int non_null;
140         int active;
141         int abandoning;
142         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
143                 int toggle_bits, int error_count, int condition_code,
144                 int repeat_number, int halted, int skipped, int actual,
145                 int non_null);
146 };
147 /* Structure to hold all of our device specific stuff*/
148 struct usb_ftdi {
149         struct list_head ftdi_list;
150         struct mutex u132_lock;
151         int command_next;
152         int command_head;
153         struct u132_command command[COMMAND_SIZE];
154         int respond_next;
155         int respond_head;
156         struct u132_respond respond[RESPOND_SIZE];
157         struct u132_target target[4];
158         char device_name[16];
159         unsigned synchronized:1;
160         unsigned enumerated:1;
161         unsigned registered:1;
162         unsigned initialized:1;
163         unsigned card_ejected:1;
164         int function;
165         int sequence_num;
166         int disconnected;
167         int gone_away;
168         int stuck_status;
169         int status_queue_delay;
170         struct semaphore sw_lock;
171         struct usb_device *udev;
172         struct usb_interface *interface;
173         struct usb_class_driver *class;
174         struct delayed_work status_work;
175         struct delayed_work command_work;
176         struct delayed_work respond_work;
177         struct u132_platform_data platform_data;
178         struct resource resources[0];
179         struct platform_device platform_dev;
180         unsigned char *bulk_in_buffer;
181         size_t bulk_in_size;
182         size_t bulk_in_last;
183         size_t bulk_in_left;
184         __u8 bulk_in_endpointAddr;
185         __u8 bulk_out_endpointAddr;
186         struct kref kref;
187         u32 controlreg;
188         u8 response[4 + 1024];
189         int expected;
190         int received;
191         int ed_found;
192 };
193 #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
194 #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
195         platform_dev)
196 static struct usb_driver ftdi_elan_driver;
197 static void ftdi_elan_delete(struct kref *kref)
198 {
199         struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
200         dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
201         usb_put_dev(ftdi->udev);
202         ftdi->disconnected += 1;
203         mutex_lock(&ftdi_module_lock);
204         list_del_init(&ftdi->ftdi_list);
205         ftdi_instances -= 1;
206         mutex_unlock(&ftdi_module_lock);
207         kfree(ftdi->bulk_in_buffer);
208         ftdi->bulk_in_buffer = NULL;
209 }
210 
211 static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
212 {
213         kref_put(&ftdi->kref, ftdi_elan_delete);
214 }
215 
216 static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
217 {
218         kref_get(&ftdi->kref);
219 }
220 
221 static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
222 {
223         kref_init(&ftdi->kref);
224 }
225 
226 static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
227 {
228         if (!queue_delayed_work(status_queue, &ftdi->status_work, delta))
229                 kref_put(&ftdi->kref, ftdi_elan_delete);
230 }
231 
232 static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
233 {
234         if (queue_delayed_work(status_queue, &ftdi->status_work, delta))
235                 kref_get(&ftdi->kref);
236 }
237 
238 static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
239 {
240         if (cancel_delayed_work(&ftdi->status_work))
241                 kref_put(&ftdi->kref, ftdi_elan_delete);
242 }
243 
244 static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
245 {
246         if (!queue_delayed_work(command_queue, &ftdi->command_work, delta))
247                 kref_put(&ftdi->kref, ftdi_elan_delete);
248 }
249 
250 static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
251 {
252         if (queue_delayed_work(command_queue, &ftdi->command_work, delta))
253                 kref_get(&ftdi->kref);
254 }
255 
256 static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
257 {
258         if (cancel_delayed_work(&ftdi->command_work))
259                 kref_put(&ftdi->kref, ftdi_elan_delete);
260 }
261 
262 static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
263         unsigned int delta)
264 {
265         if (!queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
266                 kref_put(&ftdi->kref, ftdi_elan_delete);
267 }
268 
269 static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
270 {
271         if (queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
272                 kref_get(&ftdi->kref);
273 }
274 
275 static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
276 {
277         if (cancel_delayed_work(&ftdi->respond_work))
278                 kref_put(&ftdi->kref, ftdi_elan_delete);
279 }
280 
281 void ftdi_elan_gone_away(struct platform_device *pdev)
282 {
283         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
284         ftdi->gone_away += 1;
285         ftdi_elan_put_kref(ftdi);
286 }
287 
288 
289 EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
290 static void ftdi_release_platform_dev(struct device *dev)
291 {
292         dev->parent = NULL;
293 }
294 
295 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
296         struct u132_target *target, u8 *buffer, int length);
297 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
298 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
299 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
300 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
301 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
302 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
303 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
304 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
305 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
306 static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
307 {
308         int result;
309         if (ftdi->platform_dev.dev.parent)
310                 return -EBUSY;
311         ftdi_elan_get_kref(ftdi);
312         ftdi->platform_data.potpg = 100;
313         ftdi->platform_data.reset = NULL;
314         ftdi->platform_dev.id = ftdi->sequence_num;
315         ftdi->platform_dev.resource = ftdi->resources;
316         ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
317         ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
318         ftdi->platform_dev.dev.parent = NULL;
319         ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
320         ftdi->platform_dev.dev.dma_mask = NULL;
321         snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
322         ftdi->platform_dev.name = ftdi->device_name;
323         dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
324         request_module("u132_hcd");
325         dev_info(&ftdi->udev->dev, "registering '%s'\n",
326                 ftdi->platform_dev.name);
327         result = platform_device_register(&ftdi->platform_dev);
328         return result;
329 }
330 
331 static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
332 {
333         mutex_lock(&ftdi->u132_lock);
334         while (ftdi->respond_next > ftdi->respond_head) {
335                 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
336                         ftdi->respond_head++];
337                 *respond->result = -ESHUTDOWN;
338                 *respond->value = 0;
339                 complete(&respond->wait_completion);
340         } mutex_unlock(&ftdi->u132_lock);
341 }
342 
343 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
344 {
345         int ed_number = 4;
346         mutex_lock(&ftdi->u132_lock);
347         while (ed_number-- > 0) {
348                 struct u132_target *target = &ftdi->target[ed_number];
349                 if (target->active == 1) {
350                         target->condition_code = TD_DEVNOTRESP;
351                         mutex_unlock(&ftdi->u132_lock);
352                         ftdi_elan_do_callback(ftdi, target, NULL, 0);
353                         mutex_lock(&ftdi->u132_lock);
354                 }
355         }
356         ftdi->received = 0;
357         ftdi->expected = 4;
358         ftdi->ed_found = 0;
359         mutex_unlock(&ftdi->u132_lock);
360 }
361 
362 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
363 {
364         int ed_number = 4;
365         mutex_lock(&ftdi->u132_lock);
366         while (ed_number-- > 0) {
367                 struct u132_target *target = &ftdi->target[ed_number];
368                 target->abandoning = 1;
369               wait_1:if (target->active == 1) {
370                         int command_size = ftdi->command_next -
371                                 ftdi->command_head;
372                         if (command_size < COMMAND_SIZE) {
373                                 struct u132_command *command = &ftdi->command[
374                                         COMMAND_MASK & ftdi->command_next];
375                                 command->header = 0x80 | (ed_number << 5) | 0x4;
376                                 command->length = 0x00;
377                                 command->address = 0x00;
378                                 command->width = 0x00;
379                                 command->follows = 0;
380                                 command->value = 0;
381                                 command->buffer = &command->value;
382                                 ftdi->command_next += 1;
383                                 ftdi_elan_kick_command_queue(ftdi);
384                         } else {
385                                 mutex_unlock(&ftdi->u132_lock);
386                                 msleep(100);
387                                 mutex_lock(&ftdi->u132_lock);
388                                 goto wait_1;
389                         }
390                 }
391               wait_2:if (target->active == 1) {
392                         int command_size = ftdi->command_next -
393                                 ftdi->command_head;
394                         if (command_size < COMMAND_SIZE) {
395                                 struct u132_command *command = &ftdi->command[
396                                         COMMAND_MASK & ftdi->command_next];
397                                 command->header = 0x90 | (ed_number << 5);
398                                 command->length = 0x00;
399                                 command->address = 0x00;
400                                 command->width = 0x00;
401                                 command->follows = 0;
402                                 command->value = 0;
403                                 command->buffer = &command->value;
404                                 ftdi->command_next += 1;
405                                 ftdi_elan_kick_command_queue(ftdi);
406                         } else {
407                                 mutex_unlock(&ftdi->u132_lock);
408                                 msleep(100);
409                                 mutex_lock(&ftdi->u132_lock);
410                                 goto wait_2;
411                         }
412                 }
413         }
414         ftdi->received = 0;
415         ftdi->expected = 4;
416         ftdi->ed_found = 0;
417         mutex_unlock(&ftdi->u132_lock);
418 }
419 
420 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
421 {
422         int ed_number = 4;
423         mutex_lock(&ftdi->u132_lock);
424         while (ed_number-- > 0) {
425                 struct u132_target *target = &ftdi->target[ed_number];
426                 target->abandoning = 1;
427               wait:if (target->active == 1) {
428                         int command_size = ftdi->command_next -
429                                 ftdi->command_head;
430                         if (command_size < COMMAND_SIZE) {
431                                 struct u132_command *command = &ftdi->command[
432                                         COMMAND_MASK & ftdi->command_next];
433                                 command->header = 0x80 | (ed_number << 5) | 0x4;
434                                 command->length = 0x00;
435                                 command->address = 0x00;
436                                 command->width = 0x00;
437                                 command->follows = 0;
438                                 command->value = 0;
439                                 command->buffer = &command->value;
440                                 ftdi->command_next += 1;
441                                 ftdi_elan_kick_command_queue(ftdi);
442                         } else {
443                                 mutex_unlock(&ftdi->u132_lock);
444                                 msleep(100);
445                                 mutex_lock(&ftdi->u132_lock);
446                                 goto wait;
447                         }
448                 }
449         }
450         ftdi->received = 0;
451         ftdi->expected = 4;
452         ftdi->ed_found = 0;
453         mutex_unlock(&ftdi->u132_lock);
454 }
455 
456 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
457 {
458         ftdi_command_queue_work(ftdi, 0);
459 }
460 
461 static void ftdi_elan_command_work(struct work_struct *work)
462 {
463         struct usb_ftdi *ftdi =
464                 container_of(work, struct usb_ftdi, command_work.work);
465 
466         if (ftdi->disconnected > 0) {
467                 ftdi_elan_put_kref(ftdi);
468                 return;
469         } else {
470                 int retval = ftdi_elan_command_engine(ftdi);
471                 if (retval == -ESHUTDOWN) {
472                         ftdi->disconnected += 1;
473                 } else if (retval == -ENODEV) {
474                         ftdi->disconnected += 1;
475                 } else if (retval)
476                         dev_err(&ftdi->udev->dev, "command error %d\n", retval);
477                 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
478                 return;
479         }
480 }
481 
482 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
483 {
484         ftdi_respond_queue_work(ftdi, 0);
485 }
486 
487 static void ftdi_elan_respond_work(struct work_struct *work)
488 {
489         struct usb_ftdi *ftdi =
490                 container_of(work, struct usb_ftdi, respond_work.work);
491         if (ftdi->disconnected > 0) {
492                 ftdi_elan_put_kref(ftdi);
493                 return;
494         } else {
495                 int retval = ftdi_elan_respond_engine(ftdi);
496                 if (retval == 0) {
497                 } else if (retval == -ESHUTDOWN) {
498                         ftdi->disconnected += 1;
499                 } else if (retval == -ENODEV) {
500                         ftdi->disconnected += 1;
501                 } else if (retval == -EILSEQ) {
502                         ftdi->disconnected += 1;
503                 } else {
504                         ftdi->disconnected += 1;
505                         dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
506                 }
507                 if (ftdi->disconnected > 0) {
508                         ftdi_elan_abandon_completions(ftdi);
509                         ftdi_elan_abandon_targets(ftdi);
510                 }
511                 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
512                 return;
513         }
514 }
515 
516 
517 /*
518 * the sw_lock is initially held and will be freed
519 * after the FTDI has been synchronized
520 *
521 */
522 static void ftdi_elan_status_work(struct work_struct *work)
523 {
524         struct usb_ftdi *ftdi =
525                 container_of(work, struct usb_ftdi, status_work.work);
526         int work_delay_in_msec = 0;
527         if (ftdi->disconnected > 0) {
528                 ftdi_elan_put_kref(ftdi);
529                 return;
530         } else if (ftdi->synchronized == 0) {
531                 down(&ftdi->sw_lock);
532                 if (ftdi_elan_synchronize(ftdi) == 0) {
533                         ftdi->synchronized = 1;
534                         ftdi_command_queue_work(ftdi, 1);
535                         ftdi_respond_queue_work(ftdi, 1);
536                         up(&ftdi->sw_lock);
537                         work_delay_in_msec = 100;
538                 } else {
539                         dev_err(&ftdi->udev->dev, "synchronize failed\n");
540                         up(&ftdi->sw_lock);
541                         work_delay_in_msec = 10 *1000;
542                 }
543         } else if (ftdi->stuck_status > 0) {
544                 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
545                         ftdi->stuck_status = 0;
546                         ftdi->synchronized = 0;
547                 } else if ((ftdi->stuck_status++ % 60) == 1) {
548                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
549                                 "- please remove\n");
550                 } else
551                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
552                                 "- checked %d times\n", ftdi->stuck_status);
553                 work_delay_in_msec = 100;
554         } else if (ftdi->enumerated == 0) {
555                 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
556                         ftdi->enumerated = 1;
557                         work_delay_in_msec = 250;
558                 } else
559                         work_delay_in_msec = 1000;
560         } else if (ftdi->initialized == 0) {
561                 if (ftdi_elan_setupOHCI(ftdi) == 0) {
562                         ftdi->initialized = 1;
563                         work_delay_in_msec = 500;
564                 } else {
565                         dev_err(&ftdi->udev->dev, "initialized failed - trying "
566                                 "again in 10 seconds\n");
567                         work_delay_in_msec = 1 *1000;
568                 }
569         } else if (ftdi->registered == 0) {
570                 work_delay_in_msec = 10;
571                 if (ftdi_elan_hcd_init(ftdi) == 0) {
572                         ftdi->registered = 1;
573                 } else
574                         dev_err(&ftdi->udev->dev, "register failed\n");
575                 work_delay_in_msec = 250;
576         } else {
577                 if (ftdi_elan_checkingPCI(ftdi) == 0) {
578                         work_delay_in_msec = 250;
579                 } else if (ftdi->controlreg & 0x00400000) {
580                         if (ftdi->gone_away > 0) {
581                                 dev_err(&ftdi->udev->dev, "PCI device eject con"
582                                         "firmed platform_dev.dev.parent=%p plat"
583                                         "form_dev.dev=%p\n",
584                                         ftdi->platform_dev.dev.parent,
585                                         &ftdi->platform_dev.dev);
586                                 platform_device_unregister(&ftdi->platform_dev);
587                                 ftdi->platform_dev.dev.parent = NULL;
588                                 ftdi->registered = 0;
589                                 ftdi->enumerated = 0;
590                                 ftdi->card_ejected = 0;
591                                 ftdi->initialized = 0;
592                                 ftdi->gone_away = 0;
593                         } else
594                                 ftdi_elan_flush_targets(ftdi);
595                         work_delay_in_msec = 250;
596                 } else {
597                         dev_err(&ftdi->udev->dev, "PCI device has disappeared\n"
598                                 );
599                         ftdi_elan_cancel_targets(ftdi);
600                         work_delay_in_msec = 500;
601                         ftdi->enumerated = 0;
602                         ftdi->initialized = 0;
603                 }
604         }
605         if (ftdi->disconnected > 0) {
606                 ftdi_elan_put_kref(ftdi);
607                 return;
608         } else {
609                 ftdi_status_requeue_work(ftdi,
610                         msecs_to_jiffies(work_delay_in_msec));
611                 return;
612         }
613 }
614 
615 
616 /*
617 * file_operations for the jtag interface
618 *
619 * the usage count for the device is incremented on open()
620 * and decremented on release()
621 */
622 static int ftdi_elan_open(struct inode *inode, struct file *file)
623 {
624         int subminor;
625         struct usb_interface *interface;
626 
627         subminor = iminor(inode);
628         interface = usb_find_interface(&ftdi_elan_driver, subminor);
629 
630         if (!interface) {
631                 printk(KERN_ERR "can't find device for minor %d\n", subminor);
632                 return -ENODEV;
633         } else {
634                 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
635                 if (!ftdi) {
636                         return -ENODEV;
637                 } else {
638                         if (down_interruptible(&ftdi->sw_lock)) {
639                                 return -EINTR;
640                         } else {
641                                 ftdi_elan_get_kref(ftdi);
642                                 file->private_data = ftdi;
643                                 return 0;
644                         }
645                 }
646         }
647 }
648 
649 static int ftdi_elan_release(struct inode *inode, struct file *file)
650 {
651         struct usb_ftdi *ftdi = file->private_data;
652         if (ftdi == NULL)
653                 return -ENODEV;
654         up(&ftdi->sw_lock);        /* decrement the count on our device */
655         ftdi_elan_put_kref(ftdi);
656         return 0;
657 }
658 
659 
660 /*
661 *
662 * blocking bulk reads are used to get data from the device
663 *
664 */
665 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
666                               size_t count, loff_t *ppos)
667 {
668         char data[30 *3 + 4];
669         char *d = data;
670         int m = (sizeof(data) - 1) / 3;
671         int bytes_read = 0;
672         int retry_on_empty = 10;
673         int retry_on_timeout = 5;
674         struct usb_ftdi *ftdi = file->private_data;
675         if (ftdi->disconnected > 0) {
676                 return -ENODEV;
677         }
678         data[0] = 0;
679       have:if (ftdi->bulk_in_left > 0) {
680                 if (count-- > 0) {
681                         char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
682                         ftdi->bulk_in_left -= 1;
683                         if (bytes_read < m) {
684                                 d += sprintf(d, " %02X", 0x000000FF & *p);
685                         } else if (bytes_read > m) {
686                         } else
687                                 d += sprintf(d, " ..");
688                         if (copy_to_user(buffer++, p, 1)) {
689                                 return -EFAULT;
690                         } else {
691                                 bytes_read += 1;
692                                 goto have;
693                         }
694                 } else
695                         return bytes_read;
696         }
697       more:if (count > 0) {
698                 int packet_bytes = 0;
699                 int retval = usb_bulk_msg(ftdi->udev,
700                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
701                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
702                         &packet_bytes, 50);
703                 if (packet_bytes > 2) {
704                         ftdi->bulk_in_left = packet_bytes - 2;
705                         ftdi->bulk_in_last = 1;
706                         goto have;
707                 } else if (retval == -ETIMEDOUT) {
708                         if (retry_on_timeout-- > 0) {
709                                 goto more;
710                         } else if (bytes_read > 0) {
711                                 return bytes_read;
712                         } else
713                                 return retval;
714                 } else if (retval == 0) {
715                         if (retry_on_empty-- > 0) {
716                                 goto more;
717                         } else
718                                 return bytes_read;
719                 } else
720                         return retval;
721         } else
722                 return bytes_read;
723 }
724 
725 static void ftdi_elan_write_bulk_callback(struct urb *urb)
726 {
727         struct usb_ftdi *ftdi = urb->context;
728         int status = urb->status;
729 
730         if (status && !(status == -ENOENT || status == -ECONNRESET ||
731             status == -ESHUTDOWN)) {
732                 dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %"
733                         "d\n", urb, status);
734         }
735         usb_free_coherent(urb->dev, urb->transfer_buffer_length,
736                 urb->transfer_buffer, urb->transfer_dma);
737 }
738 
739 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
740         char *buf, int command_size, int total_size)
741 {
742         int ed_commands = 0;
743         int b = 0;
744         int I = command_size;
745         int i = ftdi->command_head;
746         while (I-- > 0) {
747                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
748                         i++];
749                 int F = command->follows;
750                 u8 *f = command->buffer;
751                 if (command->header & 0x80) {
752                         ed_commands |= 1 << (0x3 & (command->header >> 5));
753                 }
754                 buf[b++] = command->header;
755                 buf[b++] = (command->length >> 0) & 0x00FF;
756                 buf[b++] = (command->length >> 8) & 0x00FF;
757                 buf[b++] = command->address;
758                 buf[b++] = command->width;
759                 while (F-- > 0) {
760                         buf[b++] = *f++;
761                 }
762         }
763         return ed_commands;
764 }
765 
766 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
767 {
768         int total_size = 0;
769         int I = command_size;
770         int i = ftdi->command_head;
771         while (I-- > 0) {
772                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
773                         i++];
774                 total_size += 5 + command->follows;
775         } return total_size;
776 }
777 
778 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
779 {
780         int retval;
781         char *buf;
782         int ed_commands;
783         int total_size;
784         struct urb *urb;
785         int command_size = ftdi->command_next - ftdi->command_head;
786         if (command_size == 0)
787                 return 0;
788         total_size = ftdi_elan_total_command_size(ftdi, command_size);
789         urb = usb_alloc_urb(0, GFP_KERNEL);
790         if (!urb) {
791                 dev_err(&ftdi->udev->dev, "could not get a urb to write %d comm"
792                         "ands totaling %d bytes to the Uxxx\n", command_size,
793                         total_size);
794                 return -ENOMEM;
795         }
796         buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
797                 &urb->transfer_dma);
798         if (!buf) {
799                 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d c"
800                         "ommands totaling %d bytes to the Uxxx\n", command_size,
801                          total_size);
802                 usb_free_urb(urb);
803                 return -ENOMEM;
804         }
805         ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
806                 command_size, total_size);
807         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
808                 ftdi->bulk_out_endpointAddr), buf, total_size,
809                 ftdi_elan_write_bulk_callback, ftdi);
810         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
811         if (ed_commands) {
812                 char diag[40 *3 + 4];
813                 char *d = diag;
814                 int m = total_size;
815                 u8 *c = buf;
816                 int s = (sizeof(diag) - 1) / 3;
817                 diag[0] = 0;
818                 while (s-- > 0 && m-- > 0) {
819                         if (s > 0 || m == 0) {
820                                 d += sprintf(d, " %02X", *c++);
821                         } else
822                                 d += sprintf(d, " ..");
823                 }
824         }
825         retval = usb_submit_urb(urb, GFP_KERNEL);
826         if (retval) {
827                 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write "
828                         "%d commands totaling %d bytes to the Uxxx\n", retval,
829                         urb, command_size, total_size);
830                 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
831                 usb_free_urb(urb);
832                 return retval;
833         }
834         usb_free_urb(urb);        /* release our reference to this urb,
835                 the USB core will eventually free it entirely */
836         ftdi->command_head += command_size;
837         ftdi_elan_kick_respond_queue(ftdi);
838         return 0;
839 }
840 
841 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
842         struct u132_target *target, u8 *buffer, int length)
843 {
844         struct urb *urb = target->urb;
845         int halted = target->halted;
846         int skipped = target->skipped;
847         int actual = target->actual;
848         int non_null = target->non_null;
849         int toggle_bits = target->toggle_bits;
850         int error_count = target->error_count;
851         int condition_code = target->condition_code;
852         int repeat_number = target->repeat_number;
853         void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
854                 int, int, int, int) = target->callback;
855         target->active -= 1;
856         target->callback = NULL;
857         (*callback) (target->endp, urb, buffer, length, toggle_bits,
858                 error_count, condition_code, repeat_number, halted, skipped,
859                 actual, non_null);
860 }
861 
862 static char *have_ed_set_response(struct usb_ftdi *ftdi,
863         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
864         char *b)
865 {
866         int payload = (ed_length >> 0) & 0x07FF;
867         mutex_lock(&ftdi->u132_lock);
868         target->actual = 0;
869         target->non_null = (ed_length >> 15) & 0x0001;
870         target->repeat_number = (ed_length >> 11) & 0x000F;
871         if (ed_type == 0x02) {
872                 if (payload == 0 || target->abandoning > 0) {
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                 } else {
882                         ftdi->expected = 4 + payload;
883                         ftdi->ed_found = 1;
884                         mutex_unlock(&ftdi->u132_lock);
885                         return b;
886                 }
887         } else if (ed_type == 0x03) {
888                 if (payload == 0 || target->abandoning > 0) {
889                         target->abandoning = 0;
890                         mutex_unlock(&ftdi->u132_lock);
891                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
892                                 payload);
893                         ftdi->received = 0;
894                         ftdi->expected = 4;
895                         ftdi->ed_found = 0;
896                         return ftdi->response;
897                 } else {
898                         ftdi->expected = 4 + payload;
899                         ftdi->ed_found = 1;
900                         mutex_unlock(&ftdi->u132_lock);
901                         return b;
902                 }
903         } else if (ed_type == 0x01) {
904                 target->abandoning = 0;
905                 mutex_unlock(&ftdi->u132_lock);
906                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
907                         payload);
908                 ftdi->received = 0;
909                 ftdi->expected = 4;
910                 ftdi->ed_found = 0;
911                 return ftdi->response;
912         } else {
913                 target->abandoning = 0;
914                 mutex_unlock(&ftdi->u132_lock);
915                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
916                         payload);
917                 ftdi->received = 0;
918                 ftdi->expected = 4;
919                 ftdi->ed_found = 0;
920                 return ftdi->response;
921         }
922 }
923 
924 static char *have_ed_get_response(struct usb_ftdi *ftdi,
925         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
926         char *b)
927 {
928         mutex_lock(&ftdi->u132_lock);
929         target->condition_code = TD_DEVNOTRESP;
930         target->actual = (ed_length >> 0) & 0x01FF;
931         target->non_null = (ed_length >> 15) & 0x0001;
932         target->repeat_number = (ed_length >> 11) & 0x000F;
933         mutex_unlock(&ftdi->u132_lock);
934         if (target->active)
935                 ftdi_elan_do_callback(ftdi, target, NULL, 0);
936         target->abandoning = 0;
937         ftdi->received = 0;
938         ftdi->expected = 4;
939         ftdi->ed_found = 0;
940         return ftdi->response;
941 }
942 
943 
944 /*
945 * The engine tries to empty the FTDI fifo
946 *
947 * all responses found in the fifo data are dispatched thus
948 * the response buffer can only ever hold a maximum sized
949 * response from the Uxxx.
950 *
951 */
952 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
953 {
954         u8 *b = ftdi->response + ftdi->received;
955         int bytes_read = 0;
956         int retry_on_empty = 1;
957         int retry_on_timeout = 3;
958         int empty_packets = 0;
959       read:{
960                 int packet_bytes = 0;
961                 int retval = usb_bulk_msg(ftdi->udev,
962                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
963                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
964                         &packet_bytes, 500);
965                 char diag[30 *3 + 4];
966                 char *d = diag;
967                 int m = packet_bytes;
968                 u8 *c = ftdi->bulk_in_buffer;
969                 int s = (sizeof(diag) - 1) / 3;
970                 diag[0] = 0;
971                 while (s-- > 0 && m-- > 0) {
972                         if (s > 0 || m == 0) {
973                                 d += sprintf(d, " %02X", *c++);
974                         } else
975                                 d += sprintf(d, " ..");
976                 }
977                 if (packet_bytes > 2) {
978                         ftdi->bulk_in_left = packet_bytes - 2;
979                         ftdi->bulk_in_last = 1;
980                         goto have;
981                 } else if (retval == -ETIMEDOUT) {
982                         if (retry_on_timeout-- > 0) {
983                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
984                                         "t_bytes = %d with total %d bytes%s\n",
985                                         packet_bytes, bytes_read, diag);
986                                 goto more;
987                         } else if (bytes_read > 0) {
988                                 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
989                                         bytes_read, diag);
990                                 return -ENOMEM;
991                         } else {
992                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
993                                         "t_bytes = %d with total %d bytes%s\n",
994                                         packet_bytes, bytes_read, diag);
995                                 return -ENOMEM;
996                         }
997                 } else if (retval == -EILSEQ) {
998                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
999                                 " = %d with total %d bytes%s\n", retval,
1000                                 packet_bytes, bytes_read, diag);
1001                         return retval;
1002                 } else if (retval) {
1003                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1004                                 " = %d with total %d bytes%s\n", retval,
1005                                 packet_bytes, bytes_read, diag);
1006                         return retval;
1007                 } else if (packet_bytes == 2) {
1008                         unsigned char s0 = ftdi->bulk_in_buffer[0];
1009                         unsigned char s1 = ftdi->bulk_in_buffer[1];
1010                         empty_packets += 1;
1011                         if (s0 == 0x31 && s1 == 0x60) {
1012                                 if (retry_on_empty-- > 0) {
1013                                         goto more;
1014                                 } else
1015                                         return 0;
1016                         } else if (s0 == 0x31 && s1 == 0x00) {
1017                                 if (retry_on_empty-- > 0) {
1018                                         goto more;
1019                                 } else
1020                                         return 0;
1021                         } else {
1022                                 if (retry_on_empty-- > 0) {
1023                                         goto more;
1024                                 } else
1025                                         return 0;
1026                         }
1027                 } else if (packet_bytes == 1) {
1028                         if (retry_on_empty-- > 0) {
1029                                 goto more;
1030                         } else
1031                                 return 0;
1032                 } else {
1033                         if (retry_on_empty-- > 0) {
1034                                 goto more;
1035                         } else
1036                                 return 0;
1037                 }
1038         }
1039       more:{
1040                 goto read;
1041         }
1042       have:if (ftdi->bulk_in_left > 0) {
1043                 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1044                 bytes_read += 1;
1045                 ftdi->bulk_in_left -= 1;
1046                 if (ftdi->received == 0 && c == 0xFF) {
1047                         goto have;
1048                 } else
1049                         *b++ = c;
1050                 if (++ftdi->received < ftdi->expected) {
1051                         goto have;
1052                 } else if (ftdi->ed_found) {
1053                         int ed_number = (ftdi->response[0] >> 5) & 0x03;
1054                         u16 ed_length = (ftdi->response[2] << 8) |
1055                                 ftdi->response[1];
1056                         struct u132_target *target = &ftdi->target[ed_number];
1057                         int payload = (ed_length >> 0) & 0x07FF;
1058                         char diag[30 *3 + 4];
1059                         char *d = diag;
1060                         int m = payload;
1061                         u8 *c = 4 + ftdi->response;
1062                         int s = (sizeof(diag) - 1) / 3;
1063                         diag[0] = 0;
1064                         while (s-- > 0 && m-- > 0) {
1065                                 if (s > 0 || m == 0) {
1066                                         d += sprintf(d, " %02X", *c++);
1067                                 } else
1068                                         d += sprintf(d, " ..");
1069                         }
1070                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1071                                 payload);
1072                         ftdi->received = 0;
1073                         ftdi->expected = 4;
1074                         ftdi->ed_found = 0;
1075                         b = ftdi->response;
1076                         goto have;
1077                 } else if (ftdi->expected == 8) {
1078                         u8 buscmd;
1079                         int respond_head = ftdi->respond_head++;
1080                         struct u132_respond *respond = &ftdi->respond[
1081                                 RESPOND_MASK & respond_head];
1082                         u32 data = ftdi->response[7];
1083                         data <<= 8;
1084                         data |= ftdi->response[6];
1085                         data <<= 8;
1086                         data |= ftdi->response[5];
1087                         data <<= 8;
1088                         data |= ftdi->response[4];
1089                         *respond->value = data;
1090                         *respond->result = 0;
1091                         complete(&respond->wait_completion);
1092                         ftdi->received = 0;
1093                         ftdi->expected = 4;
1094                         ftdi->ed_found = 0;
1095                         b = ftdi->response;
1096                         buscmd = (ftdi->response[0] >> 0) & 0x0F;
1097                         if (buscmd == 0x00) {
1098                         } else if (buscmd == 0x02) {
1099                         } else if (buscmd == 0x06) {
1100                         } else if (buscmd == 0x0A) {
1101                         } else
1102                                 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) va"
1103                                         "lue = %08X\n", buscmd, data);
1104                         goto have;
1105                 } else {
1106                         if ((ftdi->response[0] & 0x80) == 0x00) {
1107                                 ftdi->expected = 8;
1108                                 goto have;
1109                         } else {
1110                                 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1111                                 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1112                                 u16 ed_length = (ftdi->response[2] << 8) |
1113                                         ftdi->response[1];
1114                                 struct u132_target *target = &ftdi->target[
1115                                         ed_number];
1116                                 target->halted = (ftdi->response[0] >> 3) &
1117                                         0x01;
1118                                 target->skipped = (ftdi->response[0] >> 2) &
1119                                         0x01;
1120                                 target->toggle_bits = (ftdi->response[3] >> 6)
1121                                         & 0x03;
1122                                 target->error_count = (ftdi->response[3] >> 4)
1123                                         & 0x03;
1124                                 target->condition_code = (ftdi->response[
1125                                         3] >> 0) & 0x0F;
1126                                 if ((ftdi->response[0] & 0x10) == 0x00) {
1127                                         b = have_ed_set_response(ftdi, target,
1128                                                 ed_length, ed_number, ed_type,
1129                                                 b);
1130                                         goto have;
1131                                 } else {
1132                                         b = have_ed_get_response(ftdi, target,
1133                                                 ed_length, ed_number, ed_type,
1134                                                 b);
1135                                         goto have;
1136                                 }
1137                         }
1138                 }
1139         } else
1140                 goto more;
1141 }
1142 
1143 
1144 /*
1145 * create a urb, and a buffer for it, and copy the data to the urb
1146 *
1147 */
1148 static ssize_t ftdi_elan_write(struct file *file,
1149                                const char __user *user_buffer, size_t count,
1150                                loff_t *ppos)
1151 {
1152         int retval = 0;
1153         struct urb *urb;
1154         char *buf;
1155         struct usb_ftdi *ftdi = file->private_data;
1156 
1157         if (ftdi->disconnected > 0) {
1158                 return -ENODEV;
1159         }
1160         if (count == 0) {
1161                 goto exit;
1162         }
1163         urb = usb_alloc_urb(0, GFP_KERNEL);
1164         if (!urb) {
1165                 retval = -ENOMEM;
1166                 goto error_1;
1167         }
1168         buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1169                 &urb->transfer_dma);
1170         if (!buf) {
1171                 retval = -ENOMEM;
1172                 goto error_2;
1173         }
1174         if (copy_from_user(buf, user_buffer, count)) {
1175                 retval = -EFAULT;
1176                 goto error_3;
1177         }
1178         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1179                 ftdi->bulk_out_endpointAddr), buf, count,
1180                 ftdi_elan_write_bulk_callback, ftdi);
1181         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1182         retval = usb_submit_urb(urb, GFP_KERNEL);
1183         if (retval) {
1184                 dev_err(&ftdi->udev->dev, "failed submitting write urb, error %"
1185                         "d\n", retval);
1186                 goto error_3;
1187         }
1188         usb_free_urb(urb);
1189 
1190 exit:
1191         return count;
1192 error_3:
1193         usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1194 error_2:
1195         usb_free_urb(urb);
1196 error_1:
1197         return retval;
1198 }
1199 
1200 static const struct file_operations ftdi_elan_fops = {
1201         .owner = THIS_MODULE,
1202         .llseek = no_llseek,
1203         .read = ftdi_elan_read,
1204         .write = ftdi_elan_write,
1205         .open = ftdi_elan_open,
1206         .release = ftdi_elan_release,
1207 };
1208 
1209 /*
1210 * usb class driver info in order to get a minor number from the usb core,
1211 * and to have the device registered with the driver core
1212 */
1213 static struct usb_class_driver ftdi_elan_jtag_class = {
1214         .name = "ftdi-%d-jtag",
1215         .fops = &ftdi_elan_fops,
1216         .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1217 };
1218 
1219 /*
1220 * the following definitions are for the
1221 * ELAN FPGA state machgine processor that
1222 * lies on the other side of the FTDI chip
1223 */
1224 #define cPCIu132rd 0x0
1225 #define cPCIu132wr 0x1
1226 #define cPCIiord 0x2
1227 #define cPCIiowr 0x3
1228 #define cPCImemrd 0x6
1229 #define cPCImemwr 0x7
1230 #define cPCIcfgrd 0xA
1231 #define cPCIcfgwr 0xB
1232 #define cPCInull 0xF
1233 #define cU132cmd_status 0x0
1234 #define cU132flash 0x1
1235 #define cPIDsetup 0x0
1236 #define cPIDout 0x1
1237 #define cPIDin 0x2
1238 #define cPIDinonce 0x3
1239 #define cCCnoerror 0x0
1240 #define cCCcrc 0x1
1241 #define cCCbitstuff 0x2
1242 #define cCCtoggle 0x3
1243 #define cCCstall 0x4
1244 #define cCCnoresp 0x5
1245 #define cCCbadpid1 0x6
1246 #define cCCbadpid2 0x7
1247 #define cCCdataoverrun 0x8
1248 #define cCCdataunderrun 0x9
1249 #define cCCbuffoverrun 0xC
1250 #define cCCbuffunderrun 0xD
1251 #define cCCnotaccessed 0xF
1252 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1253 {
1254       wait:if (ftdi->disconnected > 0) {
1255                 return -ENODEV;
1256         } else {
1257                 int command_size;
1258                 mutex_lock(&ftdi->u132_lock);
1259                 command_size = ftdi->command_next - ftdi->command_head;
1260                 if (command_size < COMMAND_SIZE) {
1261                         struct u132_command *command = &ftdi->command[
1262                                 COMMAND_MASK & ftdi->command_next];
1263                         command->header = 0x00 | cPCIu132wr;
1264                         command->length = 0x04;
1265                         command->address = 0x00;
1266                         command->width = 0x00;
1267                         command->follows = 4;
1268                         command->value = data;
1269                         command->buffer = &command->value;
1270                         ftdi->command_next += 1;
1271                         ftdi_elan_kick_command_queue(ftdi);
1272                         mutex_unlock(&ftdi->u132_lock);
1273                         return 0;
1274                 } else {
1275                         mutex_unlock(&ftdi->u132_lock);
1276                         msleep(100);
1277                         goto wait;
1278                 }
1279         }
1280 }
1281 
1282 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1283         u8 width, u32 data)
1284 {
1285         u8 addressofs = config_offset / 4;
1286       wait:if (ftdi->disconnected > 0) {
1287                 return -ENODEV;
1288         } else {
1289                 int command_size;
1290                 mutex_lock(&ftdi->u132_lock);
1291                 command_size = ftdi->command_next - ftdi->command_head;
1292                 if (command_size < COMMAND_SIZE) {
1293                         struct u132_command *command = &ftdi->command[
1294                                 COMMAND_MASK & ftdi->command_next];
1295                         command->header = 0x00 | (cPCIcfgwr & 0x0F);
1296                         command->length = 0x04;
1297                         command->address = addressofs;
1298                         command->width = 0x00 | (width & 0x0F);
1299                         command->follows = 4;
1300                         command->value = data;
1301                         command->buffer = &command->value;
1302                         ftdi->command_next += 1;
1303                         ftdi_elan_kick_command_queue(ftdi);
1304                         mutex_unlock(&ftdi->u132_lock);
1305                         return 0;
1306                 } else {
1307                         mutex_unlock(&ftdi->u132_lock);
1308                         msleep(100);
1309                         goto wait;
1310                 }
1311         }
1312 }
1313 
1314 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1315         u8 width, u32 data)
1316 {
1317         u8 addressofs = mem_offset / 4;
1318       wait:if (ftdi->disconnected > 0) {
1319                 return -ENODEV;
1320         } else {
1321                 int command_size;
1322                 mutex_lock(&ftdi->u132_lock);
1323                 command_size = ftdi->command_next - ftdi->command_head;
1324                 if (command_size < COMMAND_SIZE) {
1325                         struct u132_command *command = &ftdi->command[
1326                                 COMMAND_MASK & ftdi->command_next];
1327                         command->header = 0x00 | (cPCImemwr & 0x0F);
1328                         command->length = 0x04;
1329                         command->address = addressofs;
1330                         command->width = 0x00 | (width & 0x0F);
1331                         command->follows = 4;
1332                         command->value = data;
1333                         command->buffer = &command->value;
1334                         ftdi->command_next += 1;
1335                         ftdi_elan_kick_command_queue(ftdi);
1336                         mutex_unlock(&ftdi->u132_lock);
1337                         return 0;
1338                 } else {
1339                         mutex_unlock(&ftdi->u132_lock);
1340                         msleep(100);
1341                         goto wait;
1342                 }
1343         }
1344 }
1345 
1346 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1347         u8 width, u32 data)
1348 {
1349         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1350         return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1351 }
1352 
1353 
1354 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1355 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1356 {
1357       wait:if (ftdi->disconnected > 0) {
1358                 return -ENODEV;
1359         } else {
1360                 int command_size;
1361                 int respond_size;
1362                 mutex_lock(&ftdi->u132_lock);
1363                 command_size = ftdi->command_next - ftdi->command_head;
1364                 respond_size = ftdi->respond_next - ftdi->respond_head;
1365                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1366                         {
1367                         struct u132_command *command = &ftdi->command[
1368                                 COMMAND_MASK & ftdi->command_next];
1369                         struct u132_respond *respond = &ftdi->respond[
1370                                 RESPOND_MASK & ftdi->respond_next];
1371                         int result = -ENODEV;
1372                         respond->result = &result;
1373                         respond->header = command->header = 0x00 | cPCIu132rd;
1374                         command->length = 0x04;
1375                         respond->address = command->address = cU132cmd_status;
1376                         command->width = 0x00;
1377                         command->follows = 0;
1378                         command->value = 0;
1379                         command->buffer = NULL;
1380                         respond->value = data;
1381                         init_completion(&respond->wait_completion);
1382                         ftdi->command_next += 1;
1383                         ftdi->respond_next += 1;
1384                         ftdi_elan_kick_command_queue(ftdi);
1385                         mutex_unlock(&ftdi->u132_lock);
1386                         wait_for_completion(&respond->wait_completion);
1387                         return result;
1388                 } else {
1389                         mutex_unlock(&ftdi->u132_lock);
1390                         msleep(100);
1391                         goto wait;
1392                 }
1393         }
1394 }
1395 
1396 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1397         u8 width, u32 *data)
1398 {
1399         u8 addressofs = config_offset / 4;
1400       wait:if (ftdi->disconnected > 0) {
1401                 return -ENODEV;
1402         } else {
1403                 int command_size;
1404                 int respond_size;
1405                 mutex_lock(&ftdi->u132_lock);
1406                 command_size = ftdi->command_next - ftdi->command_head;
1407                 respond_size = ftdi->respond_next - ftdi->respond_head;
1408                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1409                         {
1410                         struct u132_command *command = &ftdi->command[
1411                                 COMMAND_MASK & ftdi->command_next];
1412                         struct u132_respond *respond = &ftdi->respond[
1413                                 RESPOND_MASK & ftdi->respond_next];
1414                         int result = -ENODEV;
1415                         respond->result = &result;
1416                         respond->header = command->header = 0x00 | (cPCIcfgrd &
1417                                 0x0F);
1418                         command->length = 0x04;
1419                         respond->address = command->address = addressofs;
1420                         command->width = 0x00 | (width & 0x0F);
1421                         command->follows = 0;
1422                         command->value = 0;
1423                         command->buffer = NULL;
1424                         respond->value = data;
1425                         init_completion(&respond->wait_completion);
1426                         ftdi->command_next += 1;
1427                         ftdi->respond_next += 1;
1428                         ftdi_elan_kick_command_queue(ftdi);
1429                         mutex_unlock(&ftdi->u132_lock);
1430                         wait_for_completion(&respond->wait_completion);
1431                         return result;
1432                 } else {
1433                         mutex_unlock(&ftdi->u132_lock);
1434                         msleep(100);
1435                         goto wait;
1436                 }
1437         }
1438 }
1439 
1440 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1441         u8 width, u32 *data)
1442 {
1443         u8 addressofs = mem_offset / 4;
1444       wait:if (ftdi->disconnected > 0) {
1445                 return -ENODEV;
1446         } else {
1447                 int command_size;
1448                 int respond_size;
1449                 mutex_lock(&ftdi->u132_lock);
1450                 command_size = ftdi->command_next - ftdi->command_head;
1451                 respond_size = ftdi->respond_next - ftdi->respond_head;
1452                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1453                         {
1454                         struct u132_command *command = &ftdi->command[
1455                                 COMMAND_MASK & ftdi->command_next];
1456                         struct u132_respond *respond = &ftdi->respond[
1457                                 RESPOND_MASK & ftdi->respond_next];
1458                         int result = -ENODEV;
1459                         respond->result = &result;
1460                         respond->header = command->header = 0x00 | (cPCImemrd &
1461                                 0x0F);
1462                         command->length = 0x04;
1463                         respond->address = command->address = addressofs;
1464                         command->width = 0x00 | (width & 0x0F);
1465                         command->follows = 0;
1466                         command->value = 0;
1467                         command->buffer = NULL;
1468                         respond->value = data;
1469                         init_completion(&respond->wait_completion);
1470                         ftdi->command_next += 1;
1471                         ftdi->respond_next += 1;
1472                         ftdi_elan_kick_command_queue(ftdi);
1473                         mutex_unlock(&ftdi->u132_lock);
1474                         wait_for_completion(&respond->wait_completion);
1475                         return result;
1476                 } else {
1477                         mutex_unlock(&ftdi->u132_lock);
1478                         msleep(100);
1479                         goto wait;
1480                 }
1481         }
1482 }
1483 
1484 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1485         u8 width, u32 *data)
1486 {
1487         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1488         if (ftdi->initialized == 0) {
1489                 return -ENODEV;
1490         } else
1491                 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1492 }
1493 
1494 
1495 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1496 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1497         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1498         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1499         int toggle_bits, int error_count, int condition_code, int repeat_number,
1500          int halted, int skipped, int actual, int non_null))
1501 {
1502         u8 ed = ed_number - 1;
1503       wait:if (ftdi->disconnected > 0) {
1504                 return -ENODEV;
1505         } else if (ftdi->initialized == 0) {
1506                 return -ENODEV;
1507         } else {
1508                 int command_size;
1509                 mutex_lock(&ftdi->u132_lock);
1510                 command_size = ftdi->command_next - ftdi->command_head;
1511                 if (command_size < COMMAND_SIZE) {
1512                         struct u132_target *target = &ftdi->target[ed];
1513                         struct u132_command *command = &ftdi->command[
1514                                 COMMAND_MASK & ftdi->command_next];
1515                         command->header = 0x80 | (ed << 5);
1516                         command->length = 0x8007;
1517                         command->address = (toggle_bits << 6) | (ep_number << 2)
1518                                 | (address << 0);
1519                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1520                                 usb_pipeout(urb->pipe));
1521                         command->follows = 8;
1522                         command->value = 0;
1523                         command->buffer = urb->setup_packet;
1524                         target->callback = callback;
1525                         target->endp = endp;
1526                         target->urb = urb;
1527                         target->active = 1;
1528                         ftdi->command_next += 1;
1529                         ftdi_elan_kick_command_queue(ftdi);
1530                         mutex_unlock(&ftdi->u132_lock);
1531                         return 0;
1532                 } else {
1533                         mutex_unlock(&ftdi->u132_lock);
1534                         msleep(100);
1535                         goto wait;
1536                 }
1537         }
1538 }
1539 
1540 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1541         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1542         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1543         int toggle_bits, int error_count, int condition_code, int repeat_number,
1544          int halted, int skipped, int actual, int non_null))
1545 {
1546         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1547         return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1548                 ep_number, toggle_bits, callback);
1549 }
1550 
1551 
1552 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1553 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1554         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1555         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1556         int toggle_bits, int error_count, int condition_code, int repeat_number,
1557          int halted, int skipped, int actual, int non_null))
1558 {
1559         u8 ed = ed_number - 1;
1560       wait:if (ftdi->disconnected > 0) {
1561                 return -ENODEV;
1562         } else if (ftdi->initialized == 0) {
1563                 return -ENODEV;
1564         } else {
1565                 int command_size;
1566                 mutex_lock(&ftdi->u132_lock);
1567                 command_size = ftdi->command_next - ftdi->command_head;
1568                 if (command_size < COMMAND_SIZE) {
1569                         struct u132_target *target = &ftdi->target[ed];
1570                         struct u132_command *command = &ftdi->command[
1571                                 COMMAND_MASK & ftdi->command_next];
1572                         u32 remaining_length = urb->transfer_buffer_length -
1573                                 urb->actual_length;
1574                         command->header = 0x82 | (ed << 5);
1575                         if (remaining_length == 0) {
1576                                 command->length = 0x0000;
1577                         } else if (remaining_length > 1024) {
1578                                 command->length = 0x8000 | 1023;
1579                         } else
1580                                 command->length = 0x8000 | (remaining_length -
1581                                         1);
1582                         command->address = (toggle_bits << 6) | (ep_number << 2)
1583                                 | (address << 0);
1584                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1585                                 usb_pipeout(urb->pipe));
1586                         command->follows = 0;
1587                         command->value = 0;
1588                         command->buffer = NULL;
1589                         target->callback = callback;
1590                         target->endp = endp;
1591                         target->urb = urb;
1592                         target->active = 1;
1593                         ftdi->command_next += 1;
1594                         ftdi_elan_kick_command_queue(ftdi);
1595                         mutex_unlock(&ftdi->u132_lock);
1596                         return 0;
1597                 } else {
1598                         mutex_unlock(&ftdi->u132_lock);
1599                         msleep(100);
1600                         goto wait;
1601                 }
1602         }
1603 }
1604 
1605 int usb_ftdi_elan_edset_input(struct platform_device *pdev, 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         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1612         return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1613                 ep_number, toggle_bits, callback);
1614 }
1615 
1616 
1617 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1618 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1619         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1620         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1621         int toggle_bits, int error_count, int condition_code, int repeat_number,
1622          int halted, int skipped, int actual, int non_null))
1623 {
1624         u8 ed = ed_number - 1;
1625       wait:if (ftdi->disconnected > 0) {
1626                 return -ENODEV;
1627         } else if (ftdi->initialized == 0) {
1628                 return -ENODEV;
1629         } else {
1630                 int command_size;
1631                 mutex_lock(&ftdi->u132_lock);
1632                 command_size = ftdi->command_next - ftdi->command_head;
1633                 if (command_size < COMMAND_SIZE) {
1634                         struct u132_target *target = &ftdi->target[ed];
1635                         struct u132_command *command = &ftdi->command[
1636                                 COMMAND_MASK & ftdi->command_next];
1637                         command->header = 0x81 | (ed << 5);
1638                         command->length = 0x0000;
1639                         command->address = (toggle_bits << 6) | (ep_number << 2)
1640                                 | (address << 0);
1641                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1642                                 usb_pipeout(urb->pipe));
1643                         command->follows = 0;
1644                         command->value = 0;
1645                         command->buffer = NULL;
1646                         target->callback = callback;
1647                         target->endp = endp;
1648                         target->urb = urb;
1649                         target->active = 1;
1650                         ftdi->command_next += 1;
1651                         ftdi_elan_kick_command_queue(ftdi);
1652                         mutex_unlock(&ftdi->u132_lock);
1653                         return 0;
1654                 } else {
1655                         mutex_unlock(&ftdi->u132_lock);
1656                         msleep(100);
1657                         goto wait;
1658                 }
1659         }
1660 }
1661 
1662 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1663         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1664         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1665         int toggle_bits, int error_count, int condition_code, int repeat_number,
1666          int halted, int skipped, int actual, int non_null))
1667 {
1668         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1669         return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1670                 ep_number, toggle_bits, callback);
1671 }
1672 
1673 
1674 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1675 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1676         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1677         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1678         int toggle_bits, int error_count, int condition_code, int repeat_number,
1679          int halted, int skipped, int actual, int non_null))
1680 {
1681         u8 ed = ed_number - 1;
1682       wait:if (ftdi->disconnected > 0) {
1683                 return -ENODEV;
1684         } else if (ftdi->initialized == 0) {
1685                 return -ENODEV;
1686         } else {
1687                 int command_size;
1688                 mutex_lock(&ftdi->u132_lock);
1689                 command_size = ftdi->command_next - ftdi->command_head;
1690                 if (command_size < COMMAND_SIZE) {
1691                         u8 *b;
1692                         u16 urb_size;
1693                         int i = 0;
1694                         char data[30 *3 + 4];
1695                         char *d = data;
1696                         int m = (sizeof(data) - 1) / 3;
1697                         int l = 0;
1698                         struct u132_target *target = &ftdi->target[ed];
1699                         struct u132_command *command = &ftdi->command[
1700                                 COMMAND_MASK & ftdi->command_next];
1701                         command->header = 0x81 | (ed << 5);
1702                         command->address = (toggle_bits << 6) | (ep_number << 2)
1703                                 | (address << 0);
1704                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1705                                 usb_pipeout(urb->pipe));
1706                         command->follows = min_t(u32, 1024,
1707                                 urb->transfer_buffer_length -
1708                                 urb->actual_length);
1709                         command->value = 0;
1710                         command->buffer = urb->transfer_buffer +
1711                                 urb->actual_length;
1712                         command->length = 0x8000 | (command->follows - 1);
1713                         b = command->buffer;
1714                         urb_size = command->follows;
1715                         data[0] = 0;
1716                         while (urb_size-- > 0) {
1717                                 if (i > m) {
1718                                 } else if (i++ < m) {
1719                                         int w = sprintf(d, " %02X", *b++);
1720                                         d += w;
1721                                         l += w;
1722                                 } else
1723                                         d += sprintf(d, " ..");
1724                         }
1725                         target->callback = callback;
1726                         target->endp = endp;
1727                         target->urb = urb;
1728                         target->active = 1;
1729                         ftdi->command_next += 1;
1730                         ftdi_elan_kick_command_queue(ftdi);
1731                         mutex_unlock(&ftdi->u132_lock);
1732                         return 0;
1733                 } else {
1734                         mutex_unlock(&ftdi->u132_lock);
1735                         msleep(100);
1736                         goto wait;
1737                 }
1738         }
1739 }
1740 
1741 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1742         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1743         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1744         int toggle_bits, int error_count, int condition_code, int repeat_number,
1745          int halted, int skipped, int actual, int non_null))
1746 {
1747         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1748         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1749                 ep_number, toggle_bits, callback);
1750 }
1751 
1752 
1753 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1754 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1755         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1756         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1757         int toggle_bits, int error_count, int condition_code, int repeat_number,
1758          int halted, int skipped, int actual, int non_null))
1759 {
1760         u8 ed = ed_number - 1;
1761       wait:if (ftdi->disconnected > 0) {
1762                 return -ENODEV;
1763         } else if (ftdi->initialized == 0) {
1764                 return -ENODEV;
1765         } else {
1766                 int command_size;
1767                 mutex_lock(&ftdi->u132_lock);
1768                 command_size = ftdi->command_next - ftdi->command_head;
1769                 if (command_size < COMMAND_SIZE) {
1770                         u32 remaining_length = urb->transfer_buffer_length -
1771                                 urb->actual_length;
1772                         struct u132_target *target = &ftdi->target[ed];
1773                         struct u132_command *command = &ftdi->command[
1774                                 COMMAND_MASK & ftdi->command_next];
1775                         command->header = 0x83 | (ed << 5);
1776                         if (remaining_length == 0) {
1777                                 command->length = 0x0000;
1778                         } else if (remaining_length > 1024) {
1779                                 command->length = 0x8000 | 1023;
1780                         } else
1781                                 command->length = 0x8000 | (remaining_length -
1782                                         1);
1783                         command->address = (toggle_bits << 6) | (ep_number << 2)
1784                                 | (address << 0);
1785                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1786                                 usb_pipeout(urb->pipe));
1787                         command->follows = 0;
1788                         command->value = 0;
1789                         command->buffer = NULL;
1790                         target->callback = callback;
1791                         target->endp = endp;
1792                         target->urb = urb;
1793                         target->active = 1;
1794                         ftdi->command_next += 1;
1795                         ftdi_elan_kick_command_queue(ftdi);
1796                         mutex_unlock(&ftdi->u132_lock);
1797                         return 0;
1798                 } else {
1799                         mutex_unlock(&ftdi->u132_lock);
1800                         msleep(100);
1801                         goto wait;
1802                 }
1803         }
1804 }
1805 
1806 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1807         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1808         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1809         int toggle_bits, int error_count, int condition_code, int repeat_number,
1810          int halted, int skipped, int actual, int non_null))
1811 {
1812         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1813         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1814                 ep_number, toggle_bits, callback);
1815 }
1816 
1817 
1818 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1819 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1820         void *endp)
1821 {
1822         u8 ed = ed_number - 1;
1823         if (ftdi->disconnected > 0) {
1824                 return -ENODEV;
1825         } else if (ftdi->initialized == 0) {
1826                 return -ENODEV;
1827         } else {
1828                 struct u132_target *target = &ftdi->target[ed];
1829                 mutex_lock(&ftdi->u132_lock);
1830                 if (target->abandoning > 0) {
1831                         mutex_unlock(&ftdi->u132_lock);
1832                         return 0;
1833                 } else {
1834                         target->abandoning = 1;
1835                       wait_1:if (target->active == 1) {
1836                                 int command_size = ftdi->command_next -
1837                                         ftdi->command_head;
1838                                 if (command_size < COMMAND_SIZE) {
1839                                         struct u132_command *command =
1840                                                 &ftdi->command[COMMAND_MASK &
1841                                                 ftdi->command_next];
1842                                         command->header = 0x80 | (ed << 5) |
1843                                                 0x4;
1844                                         command->length = 0x00;
1845                                         command->address = 0x00;
1846                                         command->width = 0x00;
1847                                         command->follows = 0;
1848                                         command->value = 0;
1849                                         command->buffer = &command->value;
1850                                         ftdi->command_next += 1;
1851                                         ftdi_elan_kick_command_queue(ftdi);
1852                                 } else {
1853                                         mutex_unlock(&ftdi->u132_lock);
1854                                         msleep(100);
1855                                         mutex_lock(&ftdi->u132_lock);
1856                                         goto wait_1;
1857                                 }
1858                         }
1859                         mutex_unlock(&ftdi->u132_lock);
1860                         return 0;
1861                 }
1862         }
1863 }
1864 
1865 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1866         void *endp)
1867 {
1868         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1869         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1870 }
1871 
1872 
1873 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1874 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1875 {
1876         int retry_on_empty = 10;
1877         int retry_on_timeout = 5;
1878         int retry_on_status = 20;
1879       more:{
1880                 int packet_bytes = 0;
1881                 int retval = usb_bulk_msg(ftdi->udev,
1882                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1883                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1884                         &packet_bytes, 100);
1885                 if (packet_bytes > 2) {
1886                         char diag[30 *3 + 4];
1887                         char *d = diag;
1888                         int m = (sizeof(diag) - 1) / 3;
1889                         char *b = ftdi->bulk_in_buffer;
1890                         int bytes_read = 0;
1891                         diag[0] = 0;
1892                         while (packet_bytes-- > 0) {
1893                                 char c = *b++;
1894                                 if (bytes_read < m) {
1895                                         d += sprintf(d, " %02X",
1896                                                 0x000000FF & c);
1897                                 } else if (bytes_read > m) {
1898                                 } else
1899                                         d += sprintf(d, " ..");
1900                                 bytes_read += 1;
1901                                 continue;
1902                         }
1903                         goto more;
1904                 } else if (packet_bytes > 1) {
1905                         char s1 = ftdi->bulk_in_buffer[0];
1906                         char s2 = ftdi->bulk_in_buffer[1];
1907                         if (s1 == 0x31 && s2 == 0x60) {
1908                                 return 0;
1909                         } else if (retry_on_status-- > 0) {
1910                                 goto more;
1911                         } else {
1912                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1913                                         "imit reached\n");
1914                                 return -EFAULT;
1915                         }
1916                 } else if (packet_bytes > 0) {
1917                         char b1 = ftdi->bulk_in_buffer[0];
1918                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
1919                                 "TDI = %02X\n", b1);
1920                         if (retry_on_status-- > 0) {
1921                                 goto more;
1922                         } else {
1923                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1924                                         "imit reached\n");
1925                                 return -EFAULT;
1926                         }
1927                 } else if (retval == -ETIMEDOUT) {
1928                         if (retry_on_timeout-- > 0) {
1929                                 goto more;
1930                         } else {
1931                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
1932                                         "t reached\n");
1933                                 return -ENOMEM;
1934                         }
1935                 } else if (retval == 0) {
1936                         if (retry_on_empty-- > 0) {
1937                                 goto more;
1938                         } else {
1939                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
1940                                         "imit reached\n");
1941                                 return -ENOMEM;
1942                         }
1943                 } else {
1944                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1945                         return retval;
1946                 }
1947         }
1948         return -1;
1949 }
1950 
1951 
1952 /*
1953 * send the long flush sequence
1954 *
1955 */
1956 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1957 {
1958         int retval;
1959         struct urb *urb;
1960         char *buf;
1961         int I = 257;
1962         int i = 0;
1963         urb = usb_alloc_urb(0, GFP_KERNEL);
1964         if (!urb) {
1965                 dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequ"
1966                         "ence\n");
1967                 return -ENOMEM;
1968         }
1969         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1970         if (!buf) {
1971                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush seq"
1972                         "uence\n");
1973                 usb_free_urb(urb);
1974                 return -ENOMEM;
1975         }
1976         while (I-- > 0)
1977                 buf[i++] = 0x55;
1978         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1979                 ftdi->bulk_out_endpointAddr), buf, i,
1980                 ftdi_elan_write_bulk_callback, ftdi);
1981         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1982         retval = usb_submit_urb(urb, GFP_KERNEL);
1983         if (retval) {
1984                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
1985                         "flush sequence\n");
1986                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1987                 usb_free_urb(urb);
1988                 return -ENOMEM;
1989         }
1990         usb_free_urb(urb);
1991         return 0;
1992 }
1993 
1994 
1995 /*
1996 * send the reset sequence
1997 *
1998 */
1999 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
2000 {
2001         int retval;
2002         struct urb *urb;
2003         char *buf;
2004         int I = 4;
2005         int i = 0;
2006         urb = usb_alloc_urb(0, GFP_KERNEL);
2007         if (!urb) {
2008                 dev_err(&ftdi->udev->dev, "could not get a urb for the reset se"
2009                         "quence\n");
2010                 return -ENOMEM;
2011         }
2012         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
2013         if (!buf) {
2014                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset"
2015                         " sequence\n");
2016                 usb_free_urb(urb);
2017                 return -ENOMEM;
2018         }
2019         buf[i++] = 0x55;
2020         buf[i++] = 0xAA;
2021         buf[i++] = 0x5A;
2022         buf[i++] = 0xA5;
2023         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2024                 ftdi->bulk_out_endpointAddr), buf, i,
2025                 ftdi_elan_write_bulk_callback, ftdi);
2026         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2027         retval = usb_submit_urb(urb, GFP_KERNEL);
2028         if (retval) {
2029                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
2030                         "reset sequence\n");
2031                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
2032                 usb_free_urb(urb);
2033                 return -ENOMEM;
2034         }
2035         usb_free_urb(urb);
2036         return 0;
2037 }
2038 
2039 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2040 {
2041         int retval;
2042         int long_stop = 10;
2043         int retry_on_timeout = 5;
2044         int retry_on_empty = 10;
2045         int err_count = 0;
2046         retval = ftdi_elan_flush_input_fifo(ftdi);
2047         if (retval)
2048                 return retval;
2049         ftdi->bulk_in_left = 0;
2050         ftdi->bulk_in_last = -1;
2051         while (long_stop-- > 0) {
2052                 int read_stop;
2053                 int read_stuck;
2054                 retval = ftdi_elan_synchronize_flush(ftdi);
2055                 if (retval)
2056                         return retval;
2057                 retval = ftdi_elan_flush_input_fifo(ftdi);
2058                 if (retval)
2059                         return retval;
2060               reset:retval = ftdi_elan_synchronize_reset(ftdi);
2061                 if (retval)
2062                         return retval;
2063                 read_stop = 100;
2064                 read_stuck = 10;
2065               read:{
2066                         int packet_bytes = 0;
2067                         retval = usb_bulk_msg(ftdi->udev,
2068                                 usb_rcvbulkpipe(ftdi->udev,
2069                                 ftdi->bulk_in_endpointAddr),
2070                                 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2071                                 &packet_bytes, 500);
2072                         if (packet_bytes > 2) {
2073                                 char diag[30 *3 + 4];
2074                                 char *d = diag;
2075                                 int m = (sizeof(diag) - 1) / 3;
2076                                 char *b = ftdi->bulk_in_buffer;
2077                                 int bytes_read = 0;
2078                                 unsigned char c = 0;
2079                                 diag[0] = 0;
2080                                 while (packet_bytes-- > 0) {
2081                                         c = *b++;
2082                                         if (bytes_read < m) {
2083                                                 d += sprintf(d, " %02X", c);
2084                                         } else if (bytes_read > m) {
2085                                         } else
2086                                                 d += sprintf(d, " ..");
2087                                         bytes_read += 1;
2088                                         continue;
2089                                 }
2090                                 if (c == 0x7E) {
2091                                         return 0;
2092                                 } else {
2093                                         if (c == 0x55) {
2094                                                 goto read;
2095                                         } else if (read_stop-- > 0) {
2096                                                 goto read;
2097                                         } else {
2098                                                 dev_err(&ftdi->udev->dev, "retr"
2099                                                         "y limit reached\n");
2100                                                 continue;
2101                                         }
2102                                 }
2103                         } else if (packet_bytes > 1) {
2104                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2105                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2106                                 if (s1 == 0x31 && s2 == 0x00) {
2107                                         if (read_stuck-- > 0) {
2108                                                 goto read;
2109                                         } else
2110                                                 goto reset;
2111                                 } else if (s1 == 0x31 && s2 == 0x60) {
2112                                         if (read_stop-- > 0) {
2113                                                 goto read;
2114                                         } else {
2115                                                 dev_err(&ftdi->udev->dev, "retr"
2116                                                         "y limit reached\n");
2117                                                 continue;
2118                                         }
2119                                 } else {
2120                                         if (read_stop-- > 0) {
2121                                                 goto read;
2122                                         } else {
2123                                                 dev_err(&ftdi->udev->dev, "retr"
2124                                                         "y limit reached\n");
2125                                                 continue;
2126                                         }
2127                                 }
2128                         } else if (packet_bytes > 0) {
2129                                 if (read_stop-- > 0) {
2130                                         goto read;
2131                                 } else {
2132                                         dev_err(&ftdi->udev->dev, "retry limit "
2133                                                 "reached\n");
2134                                         continue;
2135                                 }
2136                         } else if (retval == -ETIMEDOUT) {
2137                                 if (retry_on_timeout-- > 0) {
2138                                         goto read;
2139                                 } else {
2140                                         dev_err(&ftdi->udev->dev, "TIMED OUT re"
2141                                                 "try limit reached\n");
2142                                         continue;
2143                                 }
2144                         } else if (retval == 0) {
2145                                 if (retry_on_empty-- > 0) {
2146                                         goto read;
2147                                 } else {
2148                                         dev_err(&ftdi->udev->dev, "empty packet"
2149                                                 " retry limit reached\n");
2150                                         continue;
2151                                 }
2152                         } else {
2153                                 err_count += 1;
2154                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2155                                         retval);
2156                                 if (read_stop-- > 0) {
2157                                         goto read;
2158                                 } else {
2159                                         dev_err(&ftdi->udev->dev, "retry limit "
2160                                                 "reached\n");
2161                                         continue;
2162                                 }
2163                         }
2164                 }
2165         }
2166         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2167         return -EFAULT;
2168 }
2169 
2170 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2171 {
2172         int retry_on_empty = 10;
2173         int retry_on_timeout = 5;
2174         int retry_on_status = 50;
2175       more:{
2176                 int packet_bytes = 0;
2177                 int retval = usb_bulk_msg(ftdi->udev,
2178                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2179                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2180                         &packet_bytes, 1000);
2181                 if (packet_bytes > 2) {
2182                         char diag[30 *3 + 4];
2183                         char *d = diag;
2184                         int m = (sizeof(diag) - 1) / 3;
2185                         char *b = ftdi->bulk_in_buffer;
2186                         int bytes_read = 0;
2187                         diag[0] = 0;
2188                         while (packet_bytes-- > 0) {
2189                                 char c = *b++;
2190                                 if (bytes_read < m) {
2191                                         d += sprintf(d, " %02X",
2192                                                 0x000000FF & c);
2193                                 } else if (bytes_read > m) {
2194                                 } else
2195                                         d += sprintf(d, " ..");
2196                                 bytes_read += 1;
2197                                 continue;
2198                         }
2199                         goto more;
2200                 } else if (packet_bytes > 1) {
2201                         char s1 = ftdi->bulk_in_buffer[0];
2202                         char s2 = ftdi->bulk_in_buffer[1];
2203                         if (s1 == 0x31 && s2 == 0x60) {
2204                                 return 0;
2205                         } else if (retry_on_status-- > 0) {
2206                                 msleep(5);
2207                                 goto more;
2208                         } else
2209                                 return -EFAULT;
2210                 } else if (packet_bytes > 0) {
2211                         char b1 = ftdi->bulk_in_buffer[0];
2212                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
2213                                 "TDI = %02X\n", b1);
2214                         if (retry_on_status-- > 0) {
2215                                 msleep(5);
2216                                 goto more;
2217                         } else {
2218                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
2219                                         "imit reached\n");
2220                                 return -EFAULT;
2221                         }
2222                 } else if (retval == -ETIMEDOUT) {
2223                         if (retry_on_timeout-- > 0) {
2224                                 goto more;
2225                         } else {
2226                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
2227                                         "t reached\n");
2228                                 return -ENOMEM;
2229                         }
2230                 } else if (retval == 0) {
2231                         if (retry_on_empty-- > 0) {
2232                                 goto more;
2233                         } else {
2234                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
2235                                         "imit reached\n");
2236                                 return -ENOMEM;
2237                         }
2238                 } else {
2239                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2240                         return -ENOMEM;
2241                 }
2242         }
2243         return -1;
2244 }
2245 
2246 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2247 {
2248         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2249         if (UxxxStatus)
2250                 return UxxxStatus;
2251         if (ftdi->controlreg & 0x00400000) {
2252                 if (ftdi->card_ejected) {
2253                 } else {
2254                         ftdi->card_ejected = 1;
2255                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = "
2256                                 "%08X\n", ftdi->controlreg);
2257                 }
2258                 return -ENODEV;
2259         } else {
2260                 u8 fn = ftdi->function - 1;
2261                 int activePCIfn = fn << 8;
2262                 u32 pcidata;
2263                 u32 pciVID;
2264                 u32 pciPID;
2265                 int reg = 0;
2266                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2267                         &pcidata);
2268                 if (UxxxStatus)
2269                         return UxxxStatus;
2270                 pciVID = pcidata & 0xFFFF;
2271                 pciPID = (pcidata >> 16) & 0xFFFF;
2272                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2273                         ftdi->platform_data.device) {
2274                         return 0;
2275                 } else {
2276                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X devi"
2277                                 "ce=%04X pciPID=%04X\n",
2278                                 ftdi->platform_data.vendor, pciVID,
2279                                 ftdi->platform_data.device, pciPID);
2280                         return -ENODEV;
2281                 }
2282         }
2283 }
2284 
2285 
2286 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2287         offsetof(struct ohci_regs, member), 0, data);
2288 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2289         offsetof(struct ohci_regs, member), 0, data);
2290 
2291 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2292 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2293         OHCI_INTR_WDH)
2294 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2295 {
2296         int devices = 0;
2297         int retval;
2298         u32 hc_control;
2299         int num_ports;
2300         u32 control;
2301         u32 rh_a = -1;
2302         u32 status;
2303         u32 fminterval;
2304         u32 hc_fminterval;
2305         u32 periodicstart;
2306         u32 cmdstatus;
2307         u32 roothub_a;
2308         int mask = OHCI_INTR_INIT;
2309         int sleep_time = 0;
2310         int reset_timeout = 30;        /* ... allow extra time */
2311         int temp;
2312         retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2313         if (retval)
2314                 return retval;
2315         retval = ftdi_read_pcimem(ftdi, control, &control);
2316         if (retval)
2317                 return retval;
2318         retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2319         if (retval)
2320                 return retval;
2321         num_ports = rh_a & RH_A_NDP;
2322         retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2323         if (retval)
2324                 return retval;
2325         hc_fminterval &= 0x3fff;
2326         if (hc_fminterval != FI) {
2327         }
2328         hc_fminterval |= FSMP(hc_fminterval) << 16;
2329         retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2330         if (retval)
2331                 return retval;
2332         switch (hc_control & OHCI_CTRL_HCFS) {
2333         case OHCI_USB_OPER:
2334                 sleep_time = 0;
2335                 break;
2336         case OHCI_USB_SUSPEND:
2337         case OHCI_USB_RESUME:
2338                 hc_control &= OHCI_CTRL_RWC;
2339                 hc_control |= OHCI_USB_RESUME;
2340                 sleep_time = 10;
2341                 break;
2342         default:
2343                 hc_control &= OHCI_CTRL_RWC;
2344                 hc_control |= OHCI_USB_RESET;
2345                 sleep_time = 50;
2346                 break;
2347         }
2348         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2349         if (retval)
2350                 return retval;
2351         retval = ftdi_read_pcimem(ftdi, control, &control);
2352         if (retval)
2353                 return retval;
2354         msleep(sleep_time);
2355         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2356         if (retval)
2357                 return retval;
2358         if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2359                 for (temp = 0; temp < num_ports; temp++) {
2360                         retval = ftdi_write_pcimem(ftdi,
2361                                 roothub.portstatus[temp], RH_PS_LSDA);
2362                         if (retval)
2363                                 return retval;
2364                 }
2365         }
2366         retval = ftdi_read_pcimem(ftdi, control, &control);
2367         if (retval)
2368                 return retval;
2369       retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2370         if (retval)
2371                 return retval;
2372         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2373         if (retval)
2374                 return retval;
2375       extra:{
2376                 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2377                 if (retval)
2378                         return retval;
2379                 if (0 != (status & OHCI_HCR)) {
2380                         if (--reset_timeout == 0) {
2381                                 dev_err(&ftdi->udev->dev, "USB HC reset timed o"
2382                                         "ut!\n");
2383                                 return -ENODEV;
2384                         } else {
2385                                 msleep(5);
2386                                 goto extra;
2387                         }
2388                 }
2389         }
2390         if (quirk & OHCI_QUIRK_INITRESET) {
2391                 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2392                 if (retval)
2393                         return retval;
2394                 retval = ftdi_read_pcimem(ftdi, control, &control);
2395                 if (retval)
2396                         return retval;
2397         }
2398         retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2399         if (retval)
2400                 return retval;
2401         retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2402         if (retval)
2403                 return retval;
2404         retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2405         if (retval)
2406                 return retval;
2407         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2408         if (retval)
2409                 return retval;
2410         retval = ftdi_write_pcimem(ftdi, fminterval,
2411                 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2412         if (retval)
2413                 return retval;
2414         retval = ftdi_write_pcimem(ftdi, periodicstart,
2415                 ((9 *hc_fminterval) / 10) & 0x3fff);
2416         if (retval)
2417                 return retval;
2418         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2419         if (retval)
2420                 return retval;
2421         retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2422         if (retval)
2423                 return retval;
2424         if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2425                 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2426                         quirk |= OHCI_QUIRK_INITRESET;
2427                         goto retry;
2428                 } else
2429                         dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2430                                 fminterval, periodicstart);
2431         }                        /* start controller operations */
2432         hc_control &= OHCI_CTRL_RWC;
2433         hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2434         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2435         if (retval)
2436                 return retval;
2437         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2438         if (retval)
2439                 return retval;
2440         retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2441         if (retval)
2442                 return retval;
2443         retval = ftdi_read_pcimem(ftdi, control, &control);
2444         if (retval)
2445                 return retval;
2446         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2447         if (retval)
2448                 return retval;
2449         retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2450         if (retval)
2451                 return retval;
2452         retval = ftdi_write_pcimem(ftdi, intrdisable,
2453                 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2454                 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2455                 OHCI_INTR_SO);
2456         if (retval)
2457                 return retval;        /* handle root hub init quirks ... */
2458         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2459         if (retval)
2460                 return retval;
2461         roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2462         if (quirk & OHCI_QUIRK_SUPERIO) {
2463                 roothub_a |= RH_A_NOCP;
2464                 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2465                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2466                 if (retval)
2467                         return retval;
2468         } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2469                 roothub_a |= RH_A_NPS;
2470                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2471                 if (retval)
2472                         return retval;
2473         }
2474         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2475         if (retval)
2476                 return retval;
2477         retval = ftdi_write_pcimem(ftdi, roothub.b,
2478                 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2479         if (retval)
2480                 return retval;
2481         retval = ftdi_read_pcimem(ftdi, control, &control);
2482         if (retval)
2483                 return retval;
2484         mdelay((roothub_a >> 23) & 0x1fe);
2485         for (temp = 0; temp < num_ports; temp++) {
2486                 u32 portstatus;
2487                 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2488                         &portstatus);
2489                 if (retval)
2490                         return retval;
2491                 if (1 & portstatus)
2492                         devices += 1;
2493         }
2494         return devices;
2495 }
2496 
2497 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2498 {
2499         u32 latence_timer;
2500         int UxxxStatus;
2501         u32 pcidata;
2502         int reg = 0;
2503         int activePCIfn = fn << 8;
2504         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2505         if (UxxxStatus)
2506                 return UxxxStatus;
2507         reg = 16;
2508         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2509                 0xFFFFFFFF);
2510         if (UxxxStatus)
2511                 return UxxxStatus;
2512         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2513                 &pcidata);
2514         if (UxxxStatus)
2515                 return UxxxStatus;
2516         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2517                 0xF0000000);
2518         if (UxxxStatus)
2519                 return UxxxStatus;
2520         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2521                 &pcidata);
2522         if (UxxxStatus)
2523                 return UxxxStatus;
2524         reg = 12;
2525         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2526                 &latence_timer);
2527         if (UxxxStatus)
2528                 return UxxxStatus;
2529         latence_timer &= 0xFFFF00FF;
2530         latence_timer |= 0x00001600;
2531         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2532                 latence_timer);
2533         if (UxxxStatus)
2534                 return UxxxStatus;
2535         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2536                 &pcidata);
2537         if (UxxxStatus)
2538                 return UxxxStatus;
2539         reg = 4;
2540         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2541                 0x06);
2542         if (UxxxStatus)
2543                 return UxxxStatus;
2544         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2545                 &pcidata);
2546         if (UxxxStatus)
2547                 return UxxxStatus;
2548         for (reg = 0; reg <= 0x54; reg += 4) {
2549                 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2550                 if (UxxxStatus)
2551                         return UxxxStatus;
2552         }
2553         return 0;
2554 }
2555 
2556 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2557 {
2558         u32 latence_timer;
2559         int UxxxStatus;
2560         u32 pcidata;
2561         int reg = 0;
2562         int activePCIfn = fn << 8;
2563         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2564         if (UxxxStatus)
2565                 return UxxxStatus;
2566         reg = 16;
2567         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2568                 0xFFFFFFFF);
2569         if (UxxxStatus)
2570                 return UxxxStatus;
2571         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2572                 &pcidata);
2573         if (UxxxStatus)
2574                 return UxxxStatus;
2575         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2576                 0x00000000);
2577         if (UxxxStatus)
2578                 return UxxxStatus;
2579         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2580                 &pcidata);
2581         if (UxxxStatus)
2582                 return UxxxStatus;
2583         reg = 12;
2584         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2585                 &latence_timer);
2586         if (UxxxStatus)
2587                 return UxxxStatus;
2588         latence_timer &= 0xFFFF00FF;
2589         latence_timer |= 0x00001600;
2590         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2591                 latence_timer);
2592         if (UxxxStatus)
2593                 return UxxxStatus;
2594         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2595                 &pcidata);
2596         if (UxxxStatus)
2597                 return UxxxStatus;
2598         reg = 4;
2599         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2600                 0x00);
2601         if (UxxxStatus)
2602                 return UxxxStatus;
2603         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2604                 &pcidata);
2605         if (UxxxStatus)
2606                 return UxxxStatus;
2607         return 0;
2608 }
2609 
2610 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2611 {
2612         int result;
2613         int UxxxStatus;
2614         UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2615         if (UxxxStatus)
2616                 return UxxxStatus;
2617         result = ftdi_elan_check_controller(ftdi, quirk);
2618         UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2619         if (UxxxStatus)
2620                 return UxxxStatus;
2621         return result;
2622 }
2623 
2624 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2625 {
2626         u32 controlreg;
2627         u8 sensebits;
2628         int UxxxStatus;
2629         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2630         if (UxxxStatus)
2631                 return UxxxStatus;
2632         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2633         if (UxxxStatus)
2634                 return UxxxStatus;
2635         msleep(750);
2636         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2637         if (UxxxStatus)
2638                 return UxxxStatus;
2639         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2640         if (UxxxStatus)
2641                 return UxxxStatus;
2642         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2643         if (UxxxStatus)
2644                 return UxxxStatus;
2645         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2646         if (UxxxStatus)
2647                 return UxxxStatus;
2648         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2649         if (UxxxStatus)
2650                 return UxxxStatus;
2651         msleep(250);
2652         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2653         if (UxxxStatus)
2654                 return UxxxStatus;
2655         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2656         if (UxxxStatus)
2657                 return UxxxStatus;
2658         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2659         if (UxxxStatus)
2660                 return UxxxStatus;
2661         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2662         if (UxxxStatus)
2663                 return UxxxStatus;
2664         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2665         if (UxxxStatus)
2666                 return UxxxStatus;
2667         msleep(1000);
2668         sensebits = (controlreg >> 16) & 0x000F;
2669         if (0x0D == sensebits)
2670                 return 0;
2671         else
2672                 return - ENXIO;
2673 }
2674 
2675 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2676 {
2677         int UxxxStatus;
2678         u32 pcidata;
2679         int reg = 0;
2680         u8 fn;
2681         int activePCIfn = 0;
2682         int max_devices = 0;
2683         int controllers = 0;
2684         int unrecognized = 0;
2685         ftdi->function = 0;
2686         for (fn = 0; (fn < 4); fn++) {
2687                 u32 pciVID = 0;
2688                 u32 pciPID = 0;
2689                 int devices = 0;
2690                 activePCIfn = fn << 8;
2691                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2692                         &pcidata);
2693                 if (UxxxStatus)
2694                         return UxxxStatus;
2695                 pciVID = pcidata & 0xFFFF;
2696                 pciPID = (pcidata >> 16) & 0xFFFF;
2697                 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2698                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2699                         controllers += 1;
2700                 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2701                         {
2702                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2703                         controllers += 1;
2704                 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2705                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2706                         controllers += 1;
2707                 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2708                         {
2709                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2710                         controllers += 1;
2711                 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2712                         devices = ftdi_elan_found_controller(ftdi, fn,
2713                                 OHCI_QUIRK_AMD756);
2714                         controllers += 1;
2715                 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2716                         devices = ftdi_elan_found_controller(ftdi, fn,
2717                                 OHCI_QUIRK_ZFMICRO);
2718                         controllers += 1;
2719                 } else if (0 == pcidata) {
2720                 } else
2721                         unrecognized += 1;
2722                 if (devices > max_devices) {
2723                         max_devices = devices;
2724                         ftdi->function = fn + 1;
2725                         ftdi->platform_data.vendor = pciVID;
2726                         ftdi->platform_data.device = pciPID;
2727                 }
2728         }
2729         if (ftdi->function > 0) {
2730                 UxxxStatus = ftdi_elan_setup_controller(ftdi,
2731                         ftdi->function - 1);
2732                 if (UxxxStatus)
2733                         return UxxxStatus;
2734                 return 0;
2735         } else if (controllers > 0) {
2736                 return -ENXIO;
2737         } else if (unrecognized > 0) {
2738                 return -ENXIO;
2739         } else {
2740                 ftdi->enumerated = 0;
2741                 return -ENXIO;
2742         }
2743 }
2744 
2745 
2746 /*
2747 * we use only the first bulk-in and bulk-out endpoints
2748 */
2749 static int ftdi_elan_probe(struct usb_interface *interface,
2750         const struct usb_device_id *id)
2751 {
2752         struct usb_host_interface *iface_desc;
2753         struct usb_endpoint_descriptor *endpoint;
2754         size_t buffer_size;
2755         int i;
2756         int retval = -ENOMEM;
2757         struct usb_ftdi *ftdi;
2758 
2759         ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2760         if (!ftdi) {
2761                 printk(KERN_ERR "Out of memory\n");
2762                 return -ENOMEM;
2763         }
2764 
2765         mutex_lock(&ftdi_module_lock);
2766         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2767         ftdi->sequence_num = ++ftdi_instances;
2768         mutex_unlock(&ftdi_module_lock);
2769         ftdi_elan_init_kref(ftdi);
2770         sema_init(&ftdi->sw_lock, 1);
2771         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2772         ftdi->interface = interface;
2773         mutex_init(&ftdi->u132_lock);
2774         ftdi->expected = 4;
2775         iface_desc = interface->cur_altsetting;
2776         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2777                 endpoint = &iface_desc->endpoint[i].desc;
2778                 if (!ftdi->bulk_in_endpointAddr &&
2779                     usb_endpoint_is_bulk_in(endpoint)) {
2780                         buffer_size = usb_endpoint_maxp(endpoint);
2781                         ftdi->bulk_in_size = buffer_size;
2782                         ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2783                         ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2784                         if (!ftdi->bulk_in_buffer) {
2785                                 dev_err(&ftdi->udev->dev, "Could not allocate b"
2786                                         "ulk_in_buffer\n");
2787                                 retval = -ENOMEM;
2788                                 goto error;
2789                         }
2790                 }
2791                 if (!ftdi->bulk_out_endpointAddr &&
2792                     usb_endpoint_is_bulk_out(endpoint)) {
2793                         ftdi->bulk_out_endpointAddr =
2794                                 endpoint->bEndpointAddress;
2795                 }
2796         }
2797         if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2798                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk"
2799                         "-out endpoints\n");
2800                 retval = -ENODEV;
2801                 goto error;
2802         }
2803         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2804                 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2805                 ftdi->bulk_out_endpointAddr);
2806         usb_set_intfdata(interface, ftdi);
2807         if (iface_desc->desc.bInterfaceNumber == 0 &&
2808                 ftdi->bulk_in_endpointAddr == 0x81 &&
2809                 ftdi->bulk_out_endpointAddr == 0x02) {
2810                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2811                 if (retval) {
2812                         dev_err(&ftdi->udev->dev, "Not able to get a minor for "
2813                                 "this device.\n");
2814                         usb_set_intfdata(interface, NULL);
2815                         retval = -ENOMEM;
2816                         goto error;
2817                 } else {
2818                         ftdi->class = &ftdi_elan_jtag_class;
2819                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface "
2820                                 "%d now attached to ftdi%d\n", ftdi,
2821                                 iface_desc->desc.bInterfaceNumber,
2822                                 interface->minor);
2823                         return 0;
2824                 }
2825         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2826                 ftdi->bulk_in_endpointAddr == 0x83 &&
2827                 ftdi->bulk_out_endpointAddr == 0x04) {
2828                 ftdi->class = NULL;
2829                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now a"
2830                         "ctivated\n", ftdi, iface_desc->desc.bInterfaceNumber);
2831                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2832                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2833                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2834                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2835                 return 0;
2836         } else {
2837                 dev_err(&ftdi->udev->dev,
2838                         "Could not find ELAN's U132 device\n");
2839                 retval = -ENODEV;
2840                 goto error;
2841         }
2842       error:if (ftdi) {
2843                 ftdi_elan_put_kref(ftdi);
2844         }
2845         return retval;
2846 }
2847 
2848 static void ftdi_elan_disconnect(struct usb_interface *interface)
2849 {
2850         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2851         ftdi->disconnected += 1;
2852         if (ftdi->class) {
2853                 int minor = interface->minor;
2854                 struct usb_class_driver *class = ftdi->class;
2855                 usb_set_intfdata(interface, NULL);
2856                 usb_deregister_dev(interface, class);
2857                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on min"
2858                         "or %d now disconnected\n", minor);
2859         } else {
2860                 ftdi_status_cancel_work(ftdi);
2861                 ftdi_command_cancel_work(ftdi);
2862                 ftdi_response_cancel_work(ftdi);
2863                 ftdi_elan_abandon_completions(ftdi);
2864                 ftdi_elan_abandon_targets(ftdi);
2865                 if (ftdi->registered) {
2866                         platform_device_unregister(&ftdi->platform_dev);
2867                         ftdi->synchronized = 0;
2868                         ftdi->enumerated = 0;
2869                         ftdi->initialized = 0;
2870                         ftdi->registered = 0;
2871                 }
2872                 flush_workqueue(status_queue);
2873                 flush_workqueue(command_queue);
2874                 flush_workqueue(respond_queue);
2875                 ftdi->disconnected += 1;
2876                 usb_set_intfdata(interface, NULL);
2877                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller inter"
2878                         "face now disconnected\n");
2879         }
2880         ftdi_elan_put_kref(ftdi);
2881 }
2882 
2883 static struct usb_driver ftdi_elan_driver = {
2884         .name = "ftdi-elan",
2885         .probe = ftdi_elan_probe,
2886         .disconnect = ftdi_elan_disconnect,
2887         .id_table = ftdi_elan_table,
2888 };
2889 static int __init ftdi_elan_init(void)
2890 {
2891         int result;
2892         printk(KERN_INFO "driver %s\n", ftdi_elan_driver.name);
2893         mutex_init(&ftdi_module_lock);
2894         INIT_LIST_HEAD(&ftdi_static_list);
2895         status_queue = create_singlethread_workqueue("ftdi-status-control");
2896         if (!status_queue)
2897                 goto err_status_queue;
2898         command_queue = create_singlethread_workqueue("ftdi-command-engine");
2899         if (!command_queue)
2900                 goto err_command_queue;
2901         respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2902         if (!respond_queue)
2903                 goto err_respond_queue;
2904         result = usb_register(&ftdi_elan_driver);
2905         if (result) {
2906                 destroy_workqueue(status_queue);
2907                 destroy_workqueue(command_queue);
2908                 destroy_workqueue(respond_queue);
2909                 printk(KERN_ERR "usb_register failed. Error number %d\n",
2910                        result);
2911         }
2912         return result;
2913 
2914  err_respond_queue:
2915         destroy_workqueue(command_queue);
2916  err_command_queue:
2917         destroy_workqueue(status_queue);
2918  err_status_queue:
2919         printk(KERN_ERR "%s couldn't create workqueue\n", ftdi_elan_driver.name);
2920         return -ENOMEM;
2921 }
2922 
2923 static void __exit ftdi_elan_exit(void)
2924 {
2925         struct usb_ftdi *ftdi;
2926         struct usb_ftdi *temp;
2927         usb_deregister(&ftdi_elan_driver);
2928         printk(KERN_INFO "ftdi_u132 driver deregistered\n");
2929         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2930                 ftdi_status_cancel_work(ftdi);
2931                 ftdi_command_cancel_work(ftdi);
2932                 ftdi_response_cancel_work(ftdi);
2933         } flush_workqueue(status_queue);
2934         destroy_workqueue(status_queue);
2935         status_queue = NULL;
2936         flush_workqueue(command_queue);
2937         destroy_workqueue(command_queue);
2938         command_queue = NULL;
2939         flush_workqueue(respond_queue);
2940         destroy_workqueue(respond_queue);
2941         respond_queue = NULL;
2942 }
2943 
2944 
2945 module_init(ftdi_elan_init);
2946 module_exit(ftdi_elan_exit);
2947 

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