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Merge tag 'trace-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[linux/fpc-iii.git] / drivers / usb / misc / ftdi-elan.c
blob8a3d9c0c8d8bc54304b5d46dc801ea1476af64f1
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
4 *
5 * Copyright(C) 2006 Elan Digital Systems Limited
6 * http://www.elandigitalsystems.com
7 *
8 * Author and Maintainer - Tony Olech - Elan Digital Systems
9 * tony.olech@elandigitalsystems.com
10 *
11 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
12 * based on various USB client drivers in the 2.6.15 linux kernel
13 * with constant reference to the 3rd Edition of Linux Device Drivers
14 * published by O'Reilly
15 *
16 * The U132 adapter is a USB to CardBus adapter specifically designed
17 * for PC cards that contain an OHCI host controller. Typical PC cards
18 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
19 *
20 * The U132 adapter will *NOT *work with PC cards that do not contain
21 * an OHCI controller. A simple way to test whether a PC card has an
22 * OHCI controller as an interface is to insert the PC card directly
23 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
24 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
25 * then there is a good chance that the U132 adapter will support the
26 * PC card.(you also need the specific client driver for the PC card)
27 *
28 * Please inform the Author and Maintainer about any PC cards that
29 * contain OHCI Host Controller and work when directly connected to
30 * an embedded CardBus slot but do not work when they are connected
31 * via an ELAN U132 adapter.
32 *
33 */
34
35 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36
37 #include <linux/kernel.h>
38 #include <linux/errno.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
41 #include <linux/ioctl.h>
42 #include <linux/pci_ids.h>
43 #include <linux/slab.h>
44 #include <linux/module.h>
45 #include <linux/kref.h>
46 #include <linux/mutex.h>
47 #include <linux/uaccess.h>
48 #include <linux/usb.h>
49 #include <linux/workqueue.h>
50 #include <linux/platform_device.h>
51 MODULE_AUTHOR("Tony Olech");
52 MODULE_DESCRIPTION("FTDI ELAN driver");
53 MODULE_LICENSE("GPL");
54 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
55 static bool distrust_firmware = 1;
56 module_param(distrust_firmware, bool, 0);
57 MODULE_PARM_DESC(distrust_firmware,
58 "true to distrust firmware power/overcurrent setup");
59 extern struct platform_driver u132_platform_driver;
60 /*
61 * ftdi_module_lock exists to protect access to global variables
62 *
63 */
64 static struct mutex ftdi_module_lock;
65 static int ftdi_instances = 0;
66 static struct list_head ftdi_static_list;
67 /*
68 * end of the global variables protected by ftdi_module_lock
69 */
70 #include "usb_u132.h"
71 #include <asm/io.h>
72 #include <linux/usb/hcd.h>
73
74 /* FIXME ohci.h is ONLY for internal use by the OHCI driver.
75 * If you're going to try stuff like this, you need to split
76 * out shareable stuff (register declarations?) into its own
77 * file, maybe name <linux/usb/ohci.h>
78 */
79
80 #include "../host/ohci.h"
81 /* Define these values to match your devices*/
82 #define USB_FTDI_ELAN_VENDOR_ID 0x0403
83 #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
84 /* table of devices that work with this driver*/
85 static const struct usb_device_id ftdi_elan_table[] = {
86 {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
87 { /* Terminating entry */ }
88 };
89
90 MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
91 /* only the jtag(firmware upgrade device) interface requires
92 * a device file and corresponding minor number, but the
93 * interface is created unconditionally - I suppose it could
94 * be configured or not according to a module parameter.
95 * But since we(now) require one interface per device,
96 * and since it unlikely that a normal installation would
97 * require more than a couple of elan-ftdi devices, 8 seems
98 * like a reasonable limit to have here, and if someone
99 * really requires more than 8 devices, then they can frig the
100 * code and recompile
101 */
102 #define USB_FTDI_ELAN_MINOR_BASE 192
103 #define COMMAND_BITS 5
104 #define COMMAND_SIZE (1<<COMMAND_BITS)
105 #define COMMAND_MASK (COMMAND_SIZE-1)
106 struct u132_command {
107 u8 header;
108 u16 length;
109 u8 address;
110 u8 width;
111 u32 value;
112 int follows;
113 void *buffer;
114 };
115 #define RESPOND_BITS 5
116 #define RESPOND_SIZE (1<<RESPOND_BITS)
117 #define RESPOND_MASK (RESPOND_SIZE-1)
118 struct u132_respond {
119 u8 header;
120 u8 address;
121 u32 *value;
122 int *result;
123 struct completion wait_completion;
124 };
125 struct u132_target {
126 void *endp;
127 struct urb *urb;
128 int toggle_bits;
129 int error_count;
130 int condition_code;
131 int repeat_number;
132 int halted;
133 int skipped;
134 int actual;
135 int non_null;
136 int active;
137 int abandoning;
138 void (*callback)(void *endp, struct urb *urb, u8 *buf, int len,
139 int toggle_bits, int error_count, int condition_code,
140 int repeat_number, int halted, int skipped, int actual,
141 int non_null);
142 };
143 /* Structure to hold all of our device specific stuff*/
144 struct usb_ftdi {
145 struct list_head ftdi_list;
146 struct mutex u132_lock;
147 int command_next;
148 int command_head;
149 struct u132_command command[COMMAND_SIZE];
150 int respond_next;
151 int respond_head;
152 struct u132_respond respond[RESPOND_SIZE];
153 struct u132_target target[4];
154 char device_name[16];
155 unsigned synchronized:1;
156 unsigned enumerated:1;
157 unsigned registered:1;
158 unsigned initialized:1;
159 unsigned card_ejected:1;
160 int function;
161 int sequence_num;
162 int disconnected;
163 int gone_away;
164 int stuck_status;
165 int status_queue_delay;
166 struct semaphore sw_lock;
167 struct usb_device *udev;
168 struct usb_interface *interface;
169 struct usb_class_driver *class;
170 struct delayed_work status_work;
171 struct delayed_work command_work;
172 struct delayed_work respond_work;
173 struct u132_platform_data platform_data;
174 struct resource resources[0];
175 struct platform_device platform_dev;
176 unsigned char *bulk_in_buffer;
177 size_t bulk_in_size;
178 size_t bulk_in_last;
179 size_t bulk_in_left;
180 __u8 bulk_in_endpointAddr;
181 __u8 bulk_out_endpointAddr;
182 struct kref kref;
183 u32 controlreg;
184 u8 response[4 + 1024];
185 int expected;
186 int received;
187 int ed_found;
188 };
189 #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
190 #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
191 platform_dev)
192 static struct usb_driver ftdi_elan_driver;
193 static void ftdi_elan_delete(struct kref *kref)
194 {
195 struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
196 dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
197 usb_put_dev(ftdi->udev);
198 ftdi->disconnected += 1;
199 mutex_lock(&ftdi_module_lock);
200 list_del_init(&ftdi->ftdi_list);
201 ftdi_instances -= 1;
202 mutex_unlock(&ftdi_module_lock);
203 kfree(ftdi->bulk_in_buffer);
204 ftdi->bulk_in_buffer = NULL;
205 }
206
207 static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
208 {
209 kref_put(&ftdi->kref, ftdi_elan_delete);
210 }
211
212 static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
213 {
214 kref_get(&ftdi->kref);
215 }
216
217 static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
218 {
219 kref_init(&ftdi->kref);
220 }
221
222 static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
223 {
224 if (!schedule_delayed_work(&ftdi->status_work, delta))
225 kref_put(&ftdi->kref, ftdi_elan_delete);
226 }
227
228 static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
229 {
230 if (schedule_delayed_work(&ftdi->status_work, delta))
231 kref_get(&ftdi->kref);
232 }
233
234 static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
235 {
236 if (cancel_delayed_work_sync(&ftdi->status_work))
237 kref_put(&ftdi->kref, ftdi_elan_delete);
238 }
239
240 static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
241 {
242 if (!schedule_delayed_work(&ftdi->command_work, delta))
243 kref_put(&ftdi->kref, ftdi_elan_delete);
244 }
245
246 static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
247 {
248 if (schedule_delayed_work(&ftdi->command_work, delta))
249 kref_get(&ftdi->kref);
250 }
251
252 static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
253 {
254 if (cancel_delayed_work_sync(&ftdi->command_work))
255 kref_put(&ftdi->kref, ftdi_elan_delete);
256 }
257
258 static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
259 unsigned int delta)
260 {
261 if (!schedule_delayed_work(&ftdi->respond_work, delta))
262 kref_put(&ftdi->kref, ftdi_elan_delete);
263 }
264
265 static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
266 {
267 if (schedule_delayed_work(&ftdi->respond_work, delta))
268 kref_get(&ftdi->kref);
269 }
270
271 static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
272 {
273 if (cancel_delayed_work_sync(&ftdi->respond_work))
274 kref_put(&ftdi->kref, ftdi_elan_delete);
275 }
276
277 void ftdi_elan_gone_away(struct platform_device *pdev)
278 {
279 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
280 ftdi->gone_away += 1;
281 ftdi_elan_put_kref(ftdi);
282 }
283
284
285 EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
286 static void ftdi_release_platform_dev(struct device *dev)
287 {
288 dev->parent = NULL;
289 }
290
291 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
292 struct u132_target *target, u8 *buffer, int length);
293 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
294 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
295 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
296 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
297 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
298 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
299 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
300 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
301 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
302 static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
303 {
304 if (ftdi->platform_dev.dev.parent)
305 return -EBUSY;
306
307 ftdi_elan_get_kref(ftdi);
308 ftdi->platform_data.potpg = 100;
309 ftdi->platform_data.reset = NULL;
310 ftdi->platform_dev.id = ftdi->sequence_num;
311 ftdi->platform_dev.resource = ftdi->resources;
312 ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
313 ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
314 ftdi->platform_dev.dev.parent = NULL;
315 ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
316 ftdi->platform_dev.dev.dma_mask = NULL;
317 snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
318 ftdi->platform_dev.name = ftdi->device_name;
319 dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
320 request_module("u132_hcd");
321 dev_info(&ftdi->udev->dev, "registering '%s'\n",
322 ftdi->platform_dev.name);
323
324 return platform_device_register(&ftdi->platform_dev);
325 }
326
327 static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
328 {
329 mutex_lock(&ftdi->u132_lock);
330 while (ftdi->respond_next > ftdi->respond_head) {
331 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
332 ftdi->respond_head++];
333 *respond->result = -ESHUTDOWN;
334 *respond->value = 0;
335 complete(&respond->wait_completion);
336 }
337 mutex_unlock(&ftdi->u132_lock);
338 }
339
340 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
341 {
342 int ed_number = 4;
343 mutex_lock(&ftdi->u132_lock);
344 while (ed_number-- > 0) {
345 struct u132_target *target = &ftdi->target[ed_number];
346 if (target->active == 1) {
347 target->condition_code = TD_DEVNOTRESP;
348 mutex_unlock(&ftdi->u132_lock);
349 ftdi_elan_do_callback(ftdi, target, NULL, 0);
350 mutex_lock(&ftdi->u132_lock);
351 }
352 }
353 ftdi->received = 0;
354 ftdi->expected = 4;
355 ftdi->ed_found = 0;
356 mutex_unlock(&ftdi->u132_lock);
357 }
358
359 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
360 {
361 int ed_number = 4;
362 mutex_lock(&ftdi->u132_lock);
363 while (ed_number-- > 0) {
364 struct u132_target *target = &ftdi->target[ed_number];
365 target->abandoning = 1;
366 wait_1:if (target->active == 1) {
367 int command_size = ftdi->command_next -
368 ftdi->command_head;
369 if (command_size < COMMAND_SIZE) {
370 struct u132_command *command = &ftdi->command[
371 COMMAND_MASK & ftdi->command_next];
372 command->header = 0x80 | (ed_number << 5) | 0x4;
373 command->length = 0x00;
374 command->address = 0x00;
375 command->width = 0x00;
376 command->follows = 0;
377 command->value = 0;
378 command->buffer = &command->value;
379 ftdi->command_next += 1;
380 ftdi_elan_kick_command_queue(ftdi);
381 } else {
382 mutex_unlock(&ftdi->u132_lock);
383 msleep(100);
384 mutex_lock(&ftdi->u132_lock);
385 goto wait_1;
386 }
387 }
388 wait_2:if (target->active == 1) {
389 int command_size = ftdi->command_next -
390 ftdi->command_head;
391 if (command_size < COMMAND_SIZE) {
392 struct u132_command *command = &ftdi->command[
393 COMMAND_MASK & ftdi->command_next];
394 command->header = 0x90 | (ed_number << 5);
395 command->length = 0x00;
396 command->address = 0x00;
397 command->width = 0x00;
398 command->follows = 0;
399 command->value = 0;
400 command->buffer = &command->value;
401 ftdi->command_next += 1;
402 ftdi_elan_kick_command_queue(ftdi);
403 } else {
404 mutex_unlock(&ftdi->u132_lock);
405 msleep(100);
406 mutex_lock(&ftdi->u132_lock);
407 goto wait_2;
408 }
409 }
410 }
411 ftdi->received = 0;
412 ftdi->expected = 4;
413 ftdi->ed_found = 0;
414 mutex_unlock(&ftdi->u132_lock);
415 }
416
417 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
418 {
419 int ed_number = 4;
420 mutex_lock(&ftdi->u132_lock);
421 while (ed_number-- > 0) {
422 struct u132_target *target = &ftdi->target[ed_number];
423 target->abandoning = 1;
424 wait:if (target->active == 1) {
425 int command_size = ftdi->command_next -
426 ftdi->command_head;
427 if (command_size < COMMAND_SIZE) {
428 struct u132_command *command = &ftdi->command[
429 COMMAND_MASK & ftdi->command_next];
430 command->header = 0x80 | (ed_number << 5) | 0x4;
431 command->length = 0x00;
432 command->address = 0x00;
433 command->width = 0x00;
434 command->follows = 0;
435 command->value = 0;
436 command->buffer = &command->value;
437 ftdi->command_next += 1;
438 ftdi_elan_kick_command_queue(ftdi);
439 } else {
440 mutex_unlock(&ftdi->u132_lock);
441 msleep(100);
442 mutex_lock(&ftdi->u132_lock);
443 goto wait;
444 }
445 }
446 }
447 ftdi->received = 0;
448 ftdi->expected = 4;
449 ftdi->ed_found = 0;
450 mutex_unlock(&ftdi->u132_lock);
451 }
452
453 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
454 {
455 ftdi_command_queue_work(ftdi, 0);
456 }
457
458 static void ftdi_elan_command_work(struct work_struct *work)
459 {
460 struct usb_ftdi *ftdi =
461 container_of(work, struct usb_ftdi, command_work.work);
462
463 if (ftdi->disconnected > 0) {
464 ftdi_elan_put_kref(ftdi);
465 return;
466 } else {
467 int retval = ftdi_elan_command_engine(ftdi);
468 if (retval == -ESHUTDOWN) {
469 ftdi->disconnected += 1;
470 } else if (retval == -ENODEV) {
471 ftdi->disconnected += 1;
472 } else if (retval)
473 dev_err(&ftdi->udev->dev, "command error %d\n", retval);
474 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
475 return;
476 }
477 }
478
479 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
480 {
481 ftdi_respond_queue_work(ftdi, 0);
482 }
483
484 static void ftdi_elan_respond_work(struct work_struct *work)
485 {
486 struct usb_ftdi *ftdi =
487 container_of(work, struct usb_ftdi, respond_work.work);
488 if (ftdi->disconnected > 0) {
489 ftdi_elan_put_kref(ftdi);
490 return;
491 } else {
492 int retval = ftdi_elan_respond_engine(ftdi);
493 if (retval == 0) {
494 } else if (retval == -ESHUTDOWN) {
495 ftdi->disconnected += 1;
496 } else if (retval == -ENODEV) {
497 ftdi->disconnected += 1;
498 } else if (retval == -EILSEQ) {
499 ftdi->disconnected += 1;
500 } else {
501 ftdi->disconnected += 1;
502 dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
503 }
504 if (ftdi->disconnected > 0) {
505 ftdi_elan_abandon_completions(ftdi);
506 ftdi_elan_abandon_targets(ftdi);
507 }
508 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
509 return;
510 }
511 }
512
513
514 /*
515 * the sw_lock is initially held and will be freed
516 * after the FTDI has been synchronized
517 *
518 */
519 static void ftdi_elan_status_work(struct work_struct *work)
520 {
521 struct usb_ftdi *ftdi =
522 container_of(work, struct usb_ftdi, status_work.work);
523 int work_delay_in_msec = 0;
524 if (ftdi->disconnected > 0) {
525 ftdi_elan_put_kref(ftdi);
526 return;
527 } else if (ftdi->synchronized == 0) {
528 down(&ftdi->sw_lock);
529 if (ftdi_elan_synchronize(ftdi) == 0) {
530 ftdi->synchronized = 1;
531 ftdi_command_queue_work(ftdi, 1);
532 ftdi_respond_queue_work(ftdi, 1);
533 up(&ftdi->sw_lock);
534 work_delay_in_msec = 100;
535 } else {
536 dev_err(&ftdi->udev->dev, "synchronize failed\n");
537 up(&ftdi->sw_lock);
538 work_delay_in_msec = 10 *1000;
539 }
540 } else if (ftdi->stuck_status > 0) {
541 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
542 ftdi->stuck_status = 0;
543 ftdi->synchronized = 0;
544 } else if ((ftdi->stuck_status++ % 60) == 1) {
545 dev_err(&ftdi->udev->dev, "WRONG type of card inserted - please remove\n");
546 } else
547 dev_err(&ftdi->udev->dev, "WRONG type of card inserted - checked %d times\n",
548 ftdi->stuck_status);
549 work_delay_in_msec = 100;
550 } else if (ftdi->enumerated == 0) {
551 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
552 ftdi->enumerated = 1;
553 work_delay_in_msec = 250;
554 } else
555 work_delay_in_msec = 1000;
556 } else if (ftdi->initialized == 0) {
557 if (ftdi_elan_setupOHCI(ftdi) == 0) {
558 ftdi->initialized = 1;
559 work_delay_in_msec = 500;
560 } else {
561 dev_err(&ftdi->udev->dev, "initialized failed - trying again in 10 seconds\n");
562 work_delay_in_msec = 1 *1000;
563 }
564 } else if (ftdi->registered == 0) {
565 work_delay_in_msec = 10;
566 if (ftdi_elan_hcd_init(ftdi) == 0) {
567 ftdi->registered = 1;
568 } else
569 dev_err(&ftdi->udev->dev, "register failed\n");
570 work_delay_in_msec = 250;
571 } else {
572 if (ftdi_elan_checkingPCI(ftdi) == 0) {
573 work_delay_in_msec = 250;
574 } else if (ftdi->controlreg & 0x00400000) {
575 if (ftdi->gone_away > 0) {
576 dev_err(&ftdi->udev->dev, "PCI device eject confirmed platform_dev.dev.parent=%p platform_dev.dev=%p\n",
577 ftdi->platform_dev.dev.parent,
578 &ftdi->platform_dev.dev);
579 platform_device_unregister(&ftdi->platform_dev);
580 ftdi->platform_dev.dev.parent = NULL;
581 ftdi->registered = 0;
582 ftdi->enumerated = 0;
583 ftdi->card_ejected = 0;
584 ftdi->initialized = 0;
585 ftdi->gone_away = 0;
586 } else
587 ftdi_elan_flush_targets(ftdi);
588 work_delay_in_msec = 250;
589 } else {
590 dev_err(&ftdi->udev->dev, "PCI device has disappeared\n");
591 ftdi_elan_cancel_targets(ftdi);
592 work_delay_in_msec = 500;
593 ftdi->enumerated = 0;
594 ftdi->initialized = 0;
595 }
596 }
597 if (ftdi->disconnected > 0) {
598 ftdi_elan_put_kref(ftdi);
599 return;
600 } else {
601 ftdi_status_requeue_work(ftdi,
602 msecs_to_jiffies(work_delay_in_msec));
603 return;
604 }
605 }
606
607
608 /*
609 * file_operations for the jtag interface
610 *
611 * the usage count for the device is incremented on open()
612 * and decremented on release()
613 */
614 static int ftdi_elan_open(struct inode *inode, struct file *file)
615 {
616 int subminor;
617 struct usb_interface *interface;
618
619 subminor = iminor(inode);
620 interface = usb_find_interface(&ftdi_elan_driver, subminor);
621
622 if (!interface) {
623 pr_err("can't find device for minor %d\n", subminor);
624 return -ENODEV;
625 } else {
626 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
627 if (!ftdi) {
628 return -ENODEV;
629 } else {
630 if (down_interruptible(&ftdi->sw_lock)) {
631 return -EINTR;
632 } else {
633 ftdi_elan_get_kref(ftdi);
634 file->private_data = ftdi;
635 return 0;
636 }
637 }
638 }
639 }
640
641 static int ftdi_elan_release(struct inode *inode, struct file *file)
642 {
643 struct usb_ftdi *ftdi = file->private_data;
644 if (ftdi == NULL)
645 return -ENODEV;
646 up(&ftdi->sw_lock); /* decrement the count on our device */
647 ftdi_elan_put_kref(ftdi);
648 return 0;
649 }
650
651
652 /*
653 *
654 * blocking bulk reads are used to get data from the device
655 *
656 */
657 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
658 size_t count, loff_t *ppos)
659 {
660 char data[30 *3 + 4];
661 char *d = data;
662 int m = (sizeof(data) - 1) / 3 - 1;
663 int bytes_read = 0;
664 int retry_on_empty = 10;
665 int retry_on_timeout = 5;
666 struct usb_ftdi *ftdi = file->private_data;
667 if (ftdi->disconnected > 0) {
668 return -ENODEV;
669 }
670 data[0] = 0;
671 have:if (ftdi->bulk_in_left > 0) {
672 if (count-- > 0) {
673 char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
674 ftdi->bulk_in_left -= 1;
675 if (bytes_read < m) {
676 d += sprintf(d, " %02X", 0x000000FF & *p);
677 } else if (bytes_read > m) {
678 } else
679 d += sprintf(d, " ..");
680 if (copy_to_user(buffer++, p, 1)) {
681 return -EFAULT;
682 } else {
683 bytes_read += 1;
684 goto have;
685 }
686 } else
687 return bytes_read;
688 }
689 more:if (count > 0) {
690 int packet_bytes = 0;
691 int retval = usb_bulk_msg(ftdi->udev,
692 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
693 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
694 &packet_bytes, 50);
695 if (packet_bytes > 2) {
696 ftdi->bulk_in_left = packet_bytes - 2;
697 ftdi->bulk_in_last = 1;
698 goto have;
699 } else if (retval == -ETIMEDOUT) {
700 if (retry_on_timeout-- > 0) {
701 goto more;
702 } else if (bytes_read > 0) {
703 return bytes_read;
704 } else
705 return retval;
706 } else if (retval == 0) {
707 if (retry_on_empty-- > 0) {
708 goto more;
709 } else
710 return bytes_read;
711 } else
712 return retval;
713 } else
714 return bytes_read;
715 }
716
717 static void ftdi_elan_write_bulk_callback(struct urb *urb)
718 {
719 struct usb_ftdi *ftdi = urb->context;
720 int status = urb->status;
721
722 if (status && !(status == -ENOENT || status == -ECONNRESET ||
723 status == -ESHUTDOWN)) {
724 dev_err(&ftdi->udev->dev,
725 "urb=%p write bulk status received: %d\n", urb, status);
726 }
727 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
728 urb->transfer_buffer, urb->transfer_dma);
729 }
730
731 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
732 char *buf, int command_size, int total_size)
733 {
734 int ed_commands = 0;
735 int b = 0;
736 int I = command_size;
737 int i = ftdi->command_head;
738 while (I-- > 0) {
739 struct u132_command *command = &ftdi->command[COMMAND_MASK &
740 i++];
741 int F = command->follows;
742 u8 *f = command->buffer;
743 if (command->header & 0x80) {
744 ed_commands |= 1 << (0x3 & (command->header >> 5));
745 }
746 buf[b++] = command->header;
747 buf[b++] = (command->length >> 0) & 0x00FF;
748 buf[b++] = (command->length >> 8) & 0x00FF;
749 buf[b++] = command->address;
750 buf[b++] = command->width;
751 while (F-- > 0) {
752 buf[b++] = *f++;
753 }
754 }
755 return ed_commands;
756 }
757
758 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
759 {
760 int total_size = 0;
761 int I = command_size;
762 int i = ftdi->command_head;
763 while (I-- > 0) {
764 struct u132_command *command = &ftdi->command[COMMAND_MASK &
765 i++];
766 total_size += 5 + command->follows;
767 }
768 return total_size;
769 }
770
771 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
772 {
773 int retval;
774 char *buf;
775 int ed_commands;
776 int total_size;
777 struct urb *urb;
778 int command_size = ftdi->command_next - ftdi->command_head;
779 if (command_size == 0)
780 return 0;
781 total_size = ftdi_elan_total_command_size(ftdi, command_size);
782 urb = usb_alloc_urb(0, GFP_KERNEL);
783 if (!urb)
784 return -ENOMEM;
785 buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
786 &urb->transfer_dma);
787 if (!buf) {
788 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d commands totaling %d bytes to the Uxxx\n",
789 command_size, total_size);
790 usb_free_urb(urb);
791 return -ENOMEM;
792 }
793 ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
794 command_size, total_size);
795 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
796 ftdi->bulk_out_endpointAddr), buf, total_size,
797 ftdi_elan_write_bulk_callback, ftdi);
798 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
799 if (ed_commands) {
800 char diag[40 *3 + 4];
801 char *d = diag;
802 int m = total_size;
803 u8 *c = buf;
804 int s = (sizeof(diag) - 1) / 3;
805 diag[0] = 0;
806 while (s-- > 0 && m-- > 0) {
807 if (s > 0 || m == 0) {
808 d += sprintf(d, " %02X", *c++);
809 } else
810 d += sprintf(d, " ..");
811 }
812 }
813 retval = usb_submit_urb(urb, GFP_KERNEL);
814 if (retval) {
815 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write %d commands totaling %d bytes to the Uxxx\n",
816 retval, urb, command_size, total_size);
817 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
818 usb_free_urb(urb);
819 return retval;
820 }
821 usb_free_urb(urb); /* release our reference to this urb,
822 the USB core will eventually free it entirely */
823 ftdi->command_head += command_size;
824 ftdi_elan_kick_respond_queue(ftdi);
825 return 0;
826 }
827
828 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
829 struct u132_target *target, u8 *buffer, int length)
830 {
831 struct urb *urb = target->urb;
832 int halted = target->halted;
833 int skipped = target->skipped;
834 int actual = target->actual;
835 int non_null = target->non_null;
836 int toggle_bits = target->toggle_bits;
837 int error_count = target->error_count;
838 int condition_code = target->condition_code;
839 int repeat_number = target->repeat_number;
840 void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
841 int, int, int, int) = target->callback;
842 target->active -= 1;
843 target->callback = NULL;
844 (*callback) (target->endp, urb, buffer, length, toggle_bits,
845 error_count, condition_code, repeat_number, halted, skipped,
846 actual, non_null);
847 }
848
849 static char *have_ed_set_response(struct usb_ftdi *ftdi,
850 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
851 char *b)
852 {
853 int payload = (ed_length >> 0) & 0x07FF;
854 mutex_lock(&ftdi->u132_lock);
855 target->actual = 0;
856 target->non_null = (ed_length >> 15) & 0x0001;
857 target->repeat_number = (ed_length >> 11) & 0x000F;
858 if (ed_type == 0x02 || ed_type == 0x03) {
859 if (payload == 0 || target->abandoning > 0) {
860 target->abandoning = 0;
861 mutex_unlock(&ftdi->u132_lock);
862 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
863 payload);
864 ftdi->received = 0;
865 ftdi->expected = 4;
866 ftdi->ed_found = 0;
867 return ftdi->response;
868 } else {
869 ftdi->expected = 4 + payload;
870 ftdi->ed_found = 1;
871 mutex_unlock(&ftdi->u132_lock);
872 return b;
873 }
874 } else {
875 target->abandoning = 0;
876 mutex_unlock(&ftdi->u132_lock);
877 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
878 payload);
879 ftdi->received = 0;
880 ftdi->expected = 4;
881 ftdi->ed_found = 0;
882 return ftdi->response;
883 }
884 }
885
886 static char *have_ed_get_response(struct usb_ftdi *ftdi,
887 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
888 char *b)
889 {
890 mutex_lock(&ftdi->u132_lock);
891 target->condition_code = TD_DEVNOTRESP;
892 target->actual = (ed_length >> 0) & 0x01FF;
893 target->non_null = (ed_length >> 15) & 0x0001;
894 target->repeat_number = (ed_length >> 11) & 0x000F;
895 mutex_unlock(&ftdi->u132_lock);
896 if (target->active)
897 ftdi_elan_do_callback(ftdi, target, NULL, 0);
898 target->abandoning = 0;
899 ftdi->received = 0;
900 ftdi->expected = 4;
901 ftdi->ed_found = 0;
902 return ftdi->response;
903 }
904
905
906 /*
907 * The engine tries to empty the FTDI fifo
908 *
909 * all responses found in the fifo data are dispatched thus
910 * the response buffer can only ever hold a maximum sized
911 * response from the Uxxx.
912 *
913 */
914 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
915 {
916 u8 *b = ftdi->response + ftdi->received;
917 int bytes_read = 0;
918 int retry_on_empty = 1;
919 int retry_on_timeout = 3;
920 read:{
921 int packet_bytes = 0;
922 int retval = usb_bulk_msg(ftdi->udev,
923 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
924 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
925 &packet_bytes, 500);
926 char diag[30 *3 + 4];
927 char *d = diag;
928 int m = packet_bytes;
929 u8 *c = ftdi->bulk_in_buffer;
930 int s = (sizeof(diag) - 1) / 3;
931 diag[0] = 0;
932 while (s-- > 0 && m-- > 0) {
933 if (s > 0 || m == 0) {
934 d += sprintf(d, " %02X", *c++);
935 } else
936 d += sprintf(d, " ..");
937 }
938 if (packet_bytes > 2) {
939 ftdi->bulk_in_left = packet_bytes - 2;
940 ftdi->bulk_in_last = 1;
941 goto have;
942 } else if (retval == -ETIMEDOUT) {
943 if (retry_on_timeout-- > 0) {
944 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
945 packet_bytes, bytes_read, diag);
946 goto more;
947 } else if (bytes_read > 0) {
948 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
949 bytes_read, diag);
950 return -ENOMEM;
951 } else {
952 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
953 packet_bytes, bytes_read, diag);
954 return -ENOMEM;
955 }
956 } else if (retval == -EILSEQ) {
957 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
958 retval, packet_bytes, bytes_read, diag);
959 return retval;
960 } else if (retval) {
961 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
962 retval, packet_bytes, bytes_read, diag);
963 return retval;
964 } else {
965 if (retry_on_empty-- > 0) {
966 goto more;
967 } else
968 return 0;
969 }
970 }
971 more:{
972 goto read;
973 }
974 have:if (ftdi->bulk_in_left > 0) {
975 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
976 bytes_read += 1;
977 ftdi->bulk_in_left -= 1;
978 if (ftdi->received == 0 && c == 0xFF) {
979 goto have;
980 } else
981 *b++ = c;
982 if (++ftdi->received < ftdi->expected) {
983 goto have;
984 } else if (ftdi->ed_found) {
985 int ed_number = (ftdi->response[0] >> 5) & 0x03;
986 u16 ed_length = (ftdi->response[2] << 8) |
987 ftdi->response[1];
988 struct u132_target *target = &ftdi->target[ed_number];
989 int payload = (ed_length >> 0) & 0x07FF;
990 char diag[30 *3 + 4];
991 char *d = diag;
992 int m = payload;
993 u8 *c = 4 + ftdi->response;
994 int s = (sizeof(diag) - 1) / 3;
995 diag[0] = 0;
996 while (s-- > 0 && m-- > 0) {
997 if (s > 0 || m == 0) {
998 d += sprintf(d, " %02X", *c++);
999 } else
1000 d += sprintf(d, " ..");
1001 }
1002 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1003 payload);
1004 ftdi->received = 0;
1005 ftdi->expected = 4;
1006 ftdi->ed_found = 0;
1007 b = ftdi->response;
1008 goto have;
1009 } else if (ftdi->expected == 8) {
1010 u8 buscmd;
1011 int respond_head = ftdi->respond_head++;
1012 struct u132_respond *respond = &ftdi->respond[
1013 RESPOND_MASK & respond_head];
1014 u32 data = ftdi->response[7];
1015 data <<= 8;
1016 data |= ftdi->response[6];
1017 data <<= 8;
1018 data |= ftdi->response[5];
1019 data <<= 8;
1020 data |= ftdi->response[4];
1021 *respond->value = data;
1022 *respond->result = 0;
1023 complete(&respond->wait_completion);
1024 ftdi->received = 0;
1025 ftdi->expected = 4;
1026 ftdi->ed_found = 0;
1027 b = ftdi->response;
1028 buscmd = (ftdi->response[0] >> 0) & 0x0F;
1029 if (buscmd == 0x00) {
1030 } else if (buscmd == 0x02) {
1031 } else if (buscmd == 0x06) {
1032 } else if (buscmd == 0x0A) {
1033 } else
1034 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1035 buscmd, data);
1036 goto have;
1037 } else {
1038 if ((ftdi->response[0] & 0x80) == 0x00) {
1039 ftdi->expected = 8;
1040 goto have;
1041 } else {
1042 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1043 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1044 u16 ed_length = (ftdi->response[2] << 8) |
1045 ftdi->response[1];
1046 struct u132_target *target = &ftdi->target[
1047 ed_number];
1048 target->halted = (ftdi->response[0] >> 3) &
1049 0x01;
1050 target->skipped = (ftdi->response[0] >> 2) &
1051 0x01;
1052 target->toggle_bits = (ftdi->response[3] >> 6)
1053 & 0x03;
1054 target->error_count = (ftdi->response[3] >> 4)
1055 & 0x03;
1056 target->condition_code = (ftdi->response[
1057 3] >> 0) & 0x0F;
1058 if ((ftdi->response[0] & 0x10) == 0x00) {
1059 b = have_ed_set_response(ftdi, target,
1060 ed_length, ed_number, ed_type,
1061 b);
1062 goto have;
1063 } else {
1064 b = have_ed_get_response(ftdi, target,
1065 ed_length, ed_number, ed_type,
1066 b);
1067 goto have;
1068 }
1069 }
1070 }
1071 } else
1072 goto more;
1073 }
1074
1075
1076 /*
1077 * create a urb, and a buffer for it, and copy the data to the urb
1078 *
1079 */
1080 static ssize_t ftdi_elan_write(struct file *file,
1081 const char __user *user_buffer, size_t count,
1082 loff_t *ppos)
1083 {
1084 int retval = 0;
1085 struct urb *urb;
1086 char *buf;
1087 struct usb_ftdi *ftdi = file->private_data;
1088
1089 if (ftdi->disconnected > 0) {
1090 return -ENODEV;
1091 }
1092 if (count == 0) {
1093 goto exit;
1094 }
1095 urb = usb_alloc_urb(0, GFP_KERNEL);
1096 if (!urb) {
1097 retval = -ENOMEM;
1098 goto error_1;
1099 }
1100 buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1101 &urb->transfer_dma);
1102 if (!buf) {
1103 retval = -ENOMEM;
1104 goto error_2;
1105 }
1106 if (copy_from_user(buf, user_buffer, count)) {
1107 retval = -EFAULT;
1108 goto error_3;
1109 }
1110 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1111 ftdi->bulk_out_endpointAddr), buf, count,
1112 ftdi_elan_write_bulk_callback, ftdi);
1113 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1114 retval = usb_submit_urb(urb, GFP_KERNEL);
1115 if (retval) {
1116 dev_err(&ftdi->udev->dev,
1117 "failed submitting write urb, error %d\n", retval);
1118 goto error_3;
1119 }
1120 usb_free_urb(urb);
1121
1122 exit:
1123 return count;
1124 error_3:
1125 usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1126 error_2:
1127 usb_free_urb(urb);
1128 error_1:
1129 return retval;
1130 }
1131
1132 static const struct file_operations ftdi_elan_fops = {
1133 .owner = THIS_MODULE,
1134 .llseek = no_llseek,
1135 .read = ftdi_elan_read,
1136 .write = ftdi_elan_write,
1137 .open = ftdi_elan_open,
1138 .release = ftdi_elan_release,
1139 };
1140
1141 /*
1142 * usb class driver info in order to get a minor number from the usb core,
1143 * and to have the device registered with the driver core
1144 */
1145 static struct usb_class_driver ftdi_elan_jtag_class = {
1146 .name = "ftdi-%d-jtag",
1147 .fops = &ftdi_elan_fops,
1148 .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1149 };
1150
1151 /*
1152 * the following definitions are for the
1153 * ELAN FPGA state machgine processor that
1154 * lies on the other side of the FTDI chip
1155 */
1156 #define cPCIu132rd 0x0
1157 #define cPCIu132wr 0x1
1158 #define cPCIiord 0x2
1159 #define cPCIiowr 0x3
1160 #define cPCImemrd 0x6
1161 #define cPCImemwr 0x7
1162 #define cPCIcfgrd 0xA
1163 #define cPCIcfgwr 0xB
1164 #define cPCInull 0xF
1165 #define cU132cmd_status 0x0
1166 #define cU132flash 0x1
1167 #define cPIDsetup 0x0
1168 #define cPIDout 0x1
1169 #define cPIDin 0x2
1170 #define cPIDinonce 0x3
1171 #define cCCnoerror 0x0
1172 #define cCCcrc 0x1
1173 #define cCCbitstuff 0x2
1174 #define cCCtoggle 0x3
1175 #define cCCstall 0x4
1176 #define cCCnoresp 0x5
1177 #define cCCbadpid1 0x6
1178 #define cCCbadpid2 0x7
1179 #define cCCdataoverrun 0x8
1180 #define cCCdataunderrun 0x9
1181 #define cCCbuffoverrun 0xC
1182 #define cCCbuffunderrun 0xD
1183 #define cCCnotaccessed 0xF
1184 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1185 {
1186 wait:if (ftdi->disconnected > 0) {
1187 return -ENODEV;
1188 } else {
1189 int command_size;
1190 mutex_lock(&ftdi->u132_lock);
1191 command_size = ftdi->command_next - ftdi->command_head;
1192 if (command_size < COMMAND_SIZE) {
1193 struct u132_command *command = &ftdi->command[
1194 COMMAND_MASK & ftdi->command_next];
1195 command->header = 0x00 | cPCIu132wr;
1196 command->length = 0x04;
1197 command->address = 0x00;
1198 command->width = 0x00;
1199 command->follows = 4;
1200 command->value = data;
1201 command->buffer = &command->value;
1202 ftdi->command_next += 1;
1203 ftdi_elan_kick_command_queue(ftdi);
1204 mutex_unlock(&ftdi->u132_lock);
1205 return 0;
1206 } else {
1207 mutex_unlock(&ftdi->u132_lock);
1208 msleep(100);
1209 goto wait;
1210 }
1211 }
1212 }
1213
1214 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1215 u8 width, u32 data)
1216 {
1217 u8 addressofs = config_offset / 4;
1218 wait:if (ftdi->disconnected > 0) {
1219 return -ENODEV;
1220 } else {
1221 int command_size;
1222 mutex_lock(&ftdi->u132_lock);
1223 command_size = ftdi->command_next - ftdi->command_head;
1224 if (command_size < COMMAND_SIZE) {
1225 struct u132_command *command = &ftdi->command[
1226 COMMAND_MASK & ftdi->command_next];
1227 command->header = 0x00 | (cPCIcfgwr & 0x0F);
1228 command->length = 0x04;
1229 command->address = addressofs;
1230 command->width = 0x00 | (width & 0x0F);
1231 command->follows = 4;
1232 command->value = data;
1233 command->buffer = &command->value;
1234 ftdi->command_next += 1;
1235 ftdi_elan_kick_command_queue(ftdi);
1236 mutex_unlock(&ftdi->u132_lock);
1237 return 0;
1238 } else {
1239 mutex_unlock(&ftdi->u132_lock);
1240 msleep(100);
1241 goto wait;
1242 }
1243 }
1244 }
1245
1246 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1247 u8 width, u32 data)
1248 {
1249 u8 addressofs = mem_offset / 4;
1250 wait:if (ftdi->disconnected > 0) {
1251 return -ENODEV;
1252 } else {
1253 int command_size;
1254 mutex_lock(&ftdi->u132_lock);
1255 command_size = ftdi->command_next - ftdi->command_head;
1256 if (command_size < COMMAND_SIZE) {
1257 struct u132_command *command = &ftdi->command[
1258 COMMAND_MASK & ftdi->command_next];
1259 command->header = 0x00 | (cPCImemwr & 0x0F);
1260 command->length = 0x04;
1261 command->address = addressofs;
1262 command->width = 0x00 | (width & 0x0F);
1263 command->follows = 4;
1264 command->value = data;
1265 command->buffer = &command->value;
1266 ftdi->command_next += 1;
1267 ftdi_elan_kick_command_queue(ftdi);
1268 mutex_unlock(&ftdi->u132_lock);
1269 return 0;
1270 } else {
1271 mutex_unlock(&ftdi->u132_lock);
1272 msleep(100);
1273 goto wait;
1274 }
1275 }
1276 }
1277
1278 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1279 u8 width, u32 data)
1280 {
1281 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1282 return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1283 }
1284
1285
1286 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1287 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1288 {
1289 wait:if (ftdi->disconnected > 0) {
1290 return -ENODEV;
1291 } else {
1292 int command_size;
1293 int respond_size;
1294 mutex_lock(&ftdi->u132_lock);
1295 command_size = ftdi->command_next - ftdi->command_head;
1296 respond_size = ftdi->respond_next - ftdi->respond_head;
1297 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1298 {
1299 struct u132_command *command = &ftdi->command[
1300 COMMAND_MASK & ftdi->command_next];
1301 struct u132_respond *respond = &ftdi->respond[
1302 RESPOND_MASK & ftdi->respond_next];
1303 int result = -ENODEV;
1304 respond->result = &result;
1305 respond->header = command->header = 0x00 | cPCIu132rd;
1306 command->length = 0x04;
1307 respond->address = command->address = cU132cmd_status;
1308 command->width = 0x00;
1309 command->follows = 0;
1310 command->value = 0;
1311 command->buffer = NULL;
1312 respond->value = data;
1313 init_completion(&respond->wait_completion);
1314 ftdi->command_next += 1;
1315 ftdi->respond_next += 1;
1316 ftdi_elan_kick_command_queue(ftdi);
1317 mutex_unlock(&ftdi->u132_lock);
1318 wait_for_completion(&respond->wait_completion);
1319 return result;
1320 } else {
1321 mutex_unlock(&ftdi->u132_lock);
1322 msleep(100);
1323 goto wait;
1324 }
1325 }
1326 }
1327
1328 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1329 u8 width, u32 *data)
1330 {
1331 u8 addressofs = config_offset / 4;
1332 wait:if (ftdi->disconnected > 0) {
1333 return -ENODEV;
1334 } else {
1335 int command_size;
1336 int respond_size;
1337 mutex_lock(&ftdi->u132_lock);
1338 command_size = ftdi->command_next - ftdi->command_head;
1339 respond_size = ftdi->respond_next - ftdi->respond_head;
1340 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1341 {
1342 struct u132_command *command = &ftdi->command[
1343 COMMAND_MASK & ftdi->command_next];
1344 struct u132_respond *respond = &ftdi->respond[
1345 RESPOND_MASK & ftdi->respond_next];
1346 int result = -ENODEV;
1347 respond->result = &result;
1348 respond->header = command->header = 0x00 | (cPCIcfgrd &
1349 0x0F);
1350 command->length = 0x04;
1351 respond->address = command->address = addressofs;
1352 command->width = 0x00 | (width & 0x0F);
1353 command->follows = 0;
1354 command->value = 0;
1355 command->buffer = NULL;
1356 respond->value = data;
1357 init_completion(&respond->wait_completion);
1358 ftdi->command_next += 1;
1359 ftdi->respond_next += 1;
1360 ftdi_elan_kick_command_queue(ftdi);
1361 mutex_unlock(&ftdi->u132_lock);
1362 wait_for_completion(&respond->wait_completion);
1363 return result;
1364 } else {
1365 mutex_unlock(&ftdi->u132_lock);
1366 msleep(100);
1367 goto wait;
1368 }
1369 }
1370 }
1371
1372 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1373 u8 width, u32 *data)
1374 {
1375 u8 addressofs = mem_offset / 4;
1376 wait:if (ftdi->disconnected > 0) {
1377 return -ENODEV;
1378 } else {
1379 int command_size;
1380 int respond_size;
1381 mutex_lock(&ftdi->u132_lock);
1382 command_size = ftdi->command_next - ftdi->command_head;
1383 respond_size = ftdi->respond_next - ftdi->respond_head;
1384 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1385 {
1386 struct u132_command *command = &ftdi->command[
1387 COMMAND_MASK & ftdi->command_next];
1388 struct u132_respond *respond = &ftdi->respond[
1389 RESPOND_MASK & ftdi->respond_next];
1390 int result = -ENODEV;
1391 respond->result = &result;
1392 respond->header = command->header = 0x00 | (cPCImemrd &
1393 0x0F);
1394 command->length = 0x04;
1395 respond->address = command->address = addressofs;
1396 command->width = 0x00 | (width & 0x0F);
1397 command->follows = 0;
1398 command->value = 0;
1399 command->buffer = NULL;
1400 respond->value = data;
1401 init_completion(&respond->wait_completion);
1402 ftdi->command_next += 1;
1403 ftdi->respond_next += 1;
1404 ftdi_elan_kick_command_queue(ftdi);
1405 mutex_unlock(&ftdi->u132_lock);
1406 wait_for_completion(&respond->wait_completion);
1407 return result;
1408 } else {
1409 mutex_unlock(&ftdi->u132_lock);
1410 msleep(100);
1411 goto wait;
1412 }
1413 }
1414 }
1415
1416 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1417 u8 width, u32 *data)
1418 {
1419 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1420 if (ftdi->initialized == 0) {
1421 return -ENODEV;
1422 } else
1423 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1424 }
1425
1426
1427 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1428 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1429 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1430 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1431 int toggle_bits, int error_count, int condition_code, int repeat_number,
1432 int halted, int skipped, int actual, int non_null))
1433 {
1434 u8 ed = ed_number - 1;
1435 wait:if (ftdi->disconnected > 0) {
1436 return -ENODEV;
1437 } else if (ftdi->initialized == 0) {
1438 return -ENODEV;
1439 } else {
1440 int command_size;
1441 mutex_lock(&ftdi->u132_lock);
1442 command_size = ftdi->command_next - ftdi->command_head;
1443 if (command_size < COMMAND_SIZE) {
1444 struct u132_target *target = &ftdi->target[ed];
1445 struct u132_command *command = &ftdi->command[
1446 COMMAND_MASK & ftdi->command_next];
1447 command->header = 0x80 | (ed << 5);
1448 command->length = 0x8007;
1449 command->address = (toggle_bits << 6) | (ep_number << 2)
1450 | (address << 0);
1451 command->width = usb_maxpacket(urb->dev, urb->pipe,
1452 usb_pipeout(urb->pipe));
1453 command->follows = 8;
1454 command->value = 0;
1455 command->buffer = urb->setup_packet;
1456 target->callback = callback;
1457 target->endp = endp;
1458 target->urb = urb;
1459 target->active = 1;
1460 ftdi->command_next += 1;
1461 ftdi_elan_kick_command_queue(ftdi);
1462 mutex_unlock(&ftdi->u132_lock);
1463 return 0;
1464 } else {
1465 mutex_unlock(&ftdi->u132_lock);
1466 msleep(100);
1467 goto wait;
1468 }
1469 }
1470 }
1471
1472 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1473 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1474 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1475 int toggle_bits, int error_count, int condition_code, int repeat_number,
1476 int halted, int skipped, int actual, int non_null))
1477 {
1478 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1479 return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1480 ep_number, toggle_bits, callback);
1481 }
1482
1483
1484 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1485 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1486 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1487 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1488 int toggle_bits, int error_count, int condition_code, int repeat_number,
1489 int halted, int skipped, int actual, int non_null))
1490 {
1491 u8 ed = ed_number - 1;
1492 wait:if (ftdi->disconnected > 0) {
1493 return -ENODEV;
1494 } else if (ftdi->initialized == 0) {
1495 return -ENODEV;
1496 } else {
1497 int command_size;
1498 mutex_lock(&ftdi->u132_lock);
1499 command_size = ftdi->command_next - ftdi->command_head;
1500 if (command_size < COMMAND_SIZE) {
1501 struct u132_target *target = &ftdi->target[ed];
1502 struct u132_command *command = &ftdi->command[
1503 COMMAND_MASK & ftdi->command_next];
1504 u32 remaining_length = urb->transfer_buffer_length -
1505 urb->actual_length;
1506 command->header = 0x82 | (ed << 5);
1507 if (remaining_length == 0) {
1508 command->length = 0x0000;
1509 } else if (remaining_length > 1024) {
1510 command->length = 0x8000 | 1023;
1511 } else
1512 command->length = 0x8000 | (remaining_length -
1513 1);
1514 command->address = (toggle_bits << 6) | (ep_number << 2)
1515 | (address << 0);
1516 command->width = usb_maxpacket(urb->dev, urb->pipe,
1517 usb_pipeout(urb->pipe));
1518 command->follows = 0;
1519 command->value = 0;
1520 command->buffer = NULL;
1521 target->callback = callback;
1522 target->endp = endp;
1523 target->urb = urb;
1524 target->active = 1;
1525 ftdi->command_next += 1;
1526 ftdi_elan_kick_command_queue(ftdi);
1527 mutex_unlock(&ftdi->u132_lock);
1528 return 0;
1529 } else {
1530 mutex_unlock(&ftdi->u132_lock);
1531 msleep(100);
1532 goto wait;
1533 }
1534 }
1535 }
1536
1537 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1538 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1539 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1540 int toggle_bits, int error_count, int condition_code, int repeat_number,
1541 int halted, int skipped, int actual, int non_null))
1542 {
1543 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1544 return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1545 ep_number, toggle_bits, callback);
1546 }
1547
1548
1549 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1550 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1551 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1552 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1553 int toggle_bits, int error_count, int condition_code, int repeat_number,
1554 int halted, int skipped, int actual, int non_null))
1555 {
1556 u8 ed = ed_number - 1;
1557 wait:if (ftdi->disconnected > 0) {
1558 return -ENODEV;
1559 } else if (ftdi->initialized == 0) {
1560 return -ENODEV;
1561 } else {
1562 int command_size;
1563 mutex_lock(&ftdi->u132_lock);
1564 command_size = ftdi->command_next - ftdi->command_head;
1565 if (command_size < COMMAND_SIZE) {
1566 struct u132_target *target = &ftdi->target[ed];
1567 struct u132_command *command = &ftdi->command[
1568 COMMAND_MASK & ftdi->command_next];
1569 command->header = 0x81 | (ed << 5);
1570 command->length = 0x0000;
1571 command->address = (toggle_bits << 6) | (ep_number << 2)
1572 | (address << 0);
1573 command->width = usb_maxpacket(urb->dev, urb->pipe,
1574 usb_pipeout(urb->pipe));
1575 command->follows = 0;
1576 command->value = 0;
1577 command->buffer = NULL;
1578 target->callback = callback;
1579 target->endp = endp;
1580 target->urb = urb;
1581 target->active = 1;
1582 ftdi->command_next += 1;
1583 ftdi_elan_kick_command_queue(ftdi);
1584 mutex_unlock(&ftdi->u132_lock);
1585 return 0;
1586 } else {
1587 mutex_unlock(&ftdi->u132_lock);
1588 msleep(100);
1589 goto wait;
1590 }
1591 }
1592 }
1593
1594 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1595 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1596 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1597 int toggle_bits, int error_count, int condition_code, int repeat_number,
1598 int halted, int skipped, int actual, int non_null))
1599 {
1600 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1601 return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1602 ep_number, toggle_bits, callback);
1603 }
1604
1605
1606 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1607 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1608 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1609 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1610 int toggle_bits, int error_count, int condition_code, int repeat_number,
1611 int halted, int skipped, int actual, int non_null))
1612 {
1613 u8 ed = ed_number - 1;
1614 wait:if (ftdi->disconnected > 0) {
1615 return -ENODEV;
1616 } else if (ftdi->initialized == 0) {
1617 return -ENODEV;
1618 } else {
1619 int command_size;
1620 mutex_lock(&ftdi->u132_lock);
1621 command_size = ftdi->command_next - ftdi->command_head;
1622 if (command_size < COMMAND_SIZE) {
1623 u8 *b;
1624 u16 urb_size;
1625 int i = 0;
1626 char data[30 *3 + 4];
1627 char *d = data;
1628 int m = (sizeof(data) - 1) / 3 - 1;
1629 int l = 0;
1630 struct u132_target *target = &ftdi->target[ed];
1631 struct u132_command *command = &ftdi->command[
1632 COMMAND_MASK & ftdi->command_next];
1633 command->header = 0x81 | (ed << 5);
1634 command->address = (toggle_bits << 6) | (ep_number << 2)
1635 | (address << 0);
1636 command->width = usb_maxpacket(urb->dev, urb->pipe,
1637 usb_pipeout(urb->pipe));
1638 command->follows = min_t(u32, 1024,
1639 urb->transfer_buffer_length -
1640 urb->actual_length);
1641 command->value = 0;
1642 command->buffer = urb->transfer_buffer +
1643 urb->actual_length;
1644 command->length = 0x8000 | (command->follows - 1);
1645 b = command->buffer;
1646 urb_size = command->follows;
1647 data[0] = 0;
1648 while (urb_size-- > 0) {
1649 if (i > m) {
1650 } else if (i++ < m) {
1651 int w = sprintf(d, " %02X", *b++);
1652 d += w;
1653 l += w;
1654 } else
1655 d += sprintf(d, " ..");
1656 }
1657 target->callback = callback;
1658 target->endp = endp;
1659 target->urb = urb;
1660 target->active = 1;
1661 ftdi->command_next += 1;
1662 ftdi_elan_kick_command_queue(ftdi);
1663 mutex_unlock(&ftdi->u132_lock);
1664 return 0;
1665 } else {
1666 mutex_unlock(&ftdi->u132_lock);
1667 msleep(100);
1668 goto wait;
1669 }
1670 }
1671 }
1672
1673 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1674 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1675 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1676 int toggle_bits, int error_count, int condition_code, int repeat_number,
1677 int halted, int skipped, int actual, int non_null))
1678 {
1679 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1680 return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1681 ep_number, toggle_bits, callback);
1682 }
1683
1684
1685 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1686 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1687 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1688 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1689 int toggle_bits, int error_count, int condition_code, int repeat_number,
1690 int halted, int skipped, int actual, int non_null))
1691 {
1692 u8 ed = ed_number - 1;
1693 wait:if (ftdi->disconnected > 0) {
1694 return -ENODEV;
1695 } else if (ftdi->initialized == 0) {
1696 return -ENODEV;
1697 } else {
1698 int command_size;
1699 mutex_lock(&ftdi->u132_lock);
1700 command_size = ftdi->command_next - ftdi->command_head;
1701 if (command_size < COMMAND_SIZE) {
1702 u32 remaining_length = urb->transfer_buffer_length -
1703 urb->actual_length;
1704 struct u132_target *target = &ftdi->target[ed];
1705 struct u132_command *command = &ftdi->command[
1706 COMMAND_MASK & ftdi->command_next];
1707 command->header = 0x83 | (ed << 5);
1708 if (remaining_length == 0) {
1709 command->length = 0x0000;
1710 } else if (remaining_length > 1024) {
1711 command->length = 0x8000 | 1023;
1712 } else
1713 command->length = 0x8000 | (remaining_length -
1714 1);
1715 command->address = (toggle_bits << 6) | (ep_number << 2)
1716 | (address << 0);
1717 command->width = usb_maxpacket(urb->dev, urb->pipe,
1718 usb_pipeout(urb->pipe));
1719 command->follows = 0;
1720 command->value = 0;
1721 command->buffer = NULL;
1722 target->callback = callback;
1723 target->endp = endp;
1724 target->urb = urb;
1725 target->active = 1;
1726 ftdi->command_next += 1;
1727 ftdi_elan_kick_command_queue(ftdi);
1728 mutex_unlock(&ftdi->u132_lock);
1729 return 0;
1730 } else {
1731 mutex_unlock(&ftdi->u132_lock);
1732 msleep(100);
1733 goto wait;
1734 }
1735 }
1736 }
1737
1738 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1739 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1740 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1741 int toggle_bits, int error_count, int condition_code, int repeat_number,
1742 int halted, int skipped, int actual, int non_null))
1743 {
1744 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1745 return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1746 ep_number, toggle_bits, callback);
1747 }
1748
1749
1750 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1751 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1752 void *endp)
1753 {
1754 u8 ed = ed_number - 1;
1755 if (ftdi->disconnected > 0) {
1756 return -ENODEV;
1757 } else if (ftdi->initialized == 0) {
1758 return -ENODEV;
1759 } else {
1760 struct u132_target *target = &ftdi->target[ed];
1761 mutex_lock(&ftdi->u132_lock);
1762 if (target->abandoning > 0) {
1763 mutex_unlock(&ftdi->u132_lock);
1764 return 0;
1765 } else {
1766 target->abandoning = 1;
1767 wait_1:if (target->active == 1) {
1768 int command_size = ftdi->command_next -
1769 ftdi->command_head;
1770 if (command_size < COMMAND_SIZE) {
1771 struct u132_command *command =
1772 &ftdi->command[COMMAND_MASK &
1773 ftdi->command_next];
1774 command->header = 0x80 | (ed << 5) |
1775 0x4;
1776 command->length = 0x00;
1777 command->address = 0x00;
1778 command->width = 0x00;
1779 command->follows = 0;
1780 command->value = 0;
1781 command->buffer = &command->value;
1782 ftdi->command_next += 1;
1783 ftdi_elan_kick_command_queue(ftdi);
1784 } else {
1785 mutex_unlock(&ftdi->u132_lock);
1786 msleep(100);
1787 mutex_lock(&ftdi->u132_lock);
1788 goto wait_1;
1789 }
1790 }
1791 mutex_unlock(&ftdi->u132_lock);
1792 return 0;
1793 }
1794 }
1795 }
1796
1797 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1798 void *endp)
1799 {
1800 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1801 return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1802 }
1803
1804
1805 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1806 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1807 {
1808 int retry_on_empty = 10;
1809 int retry_on_timeout = 5;
1810 int retry_on_status = 20;
1811 more:{
1812 int packet_bytes = 0;
1813 int retval = usb_bulk_msg(ftdi->udev,
1814 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1815 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1816 &packet_bytes, 100);
1817 if (packet_bytes > 2) {
1818 char diag[30 *3 + 4];
1819 char *d = diag;
1820 int m = (sizeof(diag) - 1) / 3 - 1;
1821 char *b = ftdi->bulk_in_buffer;
1822 int bytes_read = 0;
1823 diag[0] = 0;
1824 while (packet_bytes-- > 0) {
1825 char c = *b++;
1826 if (bytes_read < m) {
1827 d += sprintf(d, " %02X",
1828 0x000000FF & c);
1829 } else if (bytes_read > m) {
1830 } else
1831 d += sprintf(d, " ..");
1832 bytes_read += 1;
1833 continue;
1834 }
1835 goto more;
1836 } else if (packet_bytes > 1) {
1837 char s1 = ftdi->bulk_in_buffer[0];
1838 char s2 = ftdi->bulk_in_buffer[1];
1839 if (s1 == 0x31 && s2 == 0x60) {
1840 return 0;
1841 } else if (retry_on_status-- > 0) {
1842 goto more;
1843 } else {
1844 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1845 return -EFAULT;
1846 }
1847 } else if (packet_bytes > 0) {
1848 char b1 = ftdi->bulk_in_buffer[0];
1849 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1850 b1);
1851 if (retry_on_status-- > 0) {
1852 goto more;
1853 } else {
1854 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1855 return -EFAULT;
1856 }
1857 } else if (retval == -ETIMEDOUT) {
1858 if (retry_on_timeout-- > 0) {
1859 goto more;
1860 } else {
1861 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1862 return -ENOMEM;
1863 }
1864 } else if (retval == 0) {
1865 if (retry_on_empty-- > 0) {
1866 goto more;
1867 } else {
1868 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1869 return -ENOMEM;
1870 }
1871 } else {
1872 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1873 return retval;
1874 }
1875 }
1876 return -1;
1877 }
1878
1879
1880 /*
1881 * send the long flush sequence
1882 *
1883 */
1884 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1885 {
1886 int retval;
1887 struct urb *urb;
1888 char *buf;
1889 int I = 257;
1890 int i = 0;
1891 urb = usb_alloc_urb(0, GFP_KERNEL);
1892 if (!urb)
1893 return -ENOMEM;
1894 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1895 if (!buf) {
1896 dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1897 usb_free_urb(urb);
1898 return -ENOMEM;
1899 }
1900 while (I-- > 0)
1901 buf[i++] = 0x55;
1902 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1903 ftdi->bulk_out_endpointAddr), buf, i,
1904 ftdi_elan_write_bulk_callback, ftdi);
1905 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1906 retval = usb_submit_urb(urb, GFP_KERNEL);
1907 if (retval) {
1908 dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1909 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1910 usb_free_urb(urb);
1911 return -ENOMEM;
1912 }
1913 usb_free_urb(urb);
1914 return 0;
1915 }
1916
1917
1918 /*
1919 * send the reset sequence
1920 *
1921 */
1922 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1923 {
1924 int retval;
1925 struct urb *urb;
1926 char *buf;
1927 int I = 4;
1928 int i = 0;
1929 urb = usb_alloc_urb(0, GFP_KERNEL);
1930 if (!urb)
1931 return -ENOMEM;
1932 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1933 if (!buf) {
1934 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1935 usb_free_urb(urb);
1936 return -ENOMEM;
1937 }
1938 buf[i++] = 0x55;
1939 buf[i++] = 0xAA;
1940 buf[i++] = 0x5A;
1941 buf[i++] = 0xA5;
1942 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1943 ftdi->bulk_out_endpointAddr), buf, i,
1944 ftdi_elan_write_bulk_callback, ftdi);
1945 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1946 retval = usb_submit_urb(urb, GFP_KERNEL);
1947 if (retval) {
1948 dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
1949 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1950 usb_free_urb(urb);
1951 return -ENOMEM;
1952 }
1953 usb_free_urb(urb);
1954 return 0;
1955 }
1956
1957 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
1958 {
1959 int retval;
1960 int long_stop = 10;
1961 int retry_on_timeout = 5;
1962 int retry_on_empty = 10;
1963 int err_count = 0;
1964 retval = ftdi_elan_flush_input_fifo(ftdi);
1965 if (retval)
1966 return retval;
1967 ftdi->bulk_in_left = 0;
1968 ftdi->bulk_in_last = -1;
1969 while (long_stop-- > 0) {
1970 int read_stop;
1971 int read_stuck;
1972 retval = ftdi_elan_synchronize_flush(ftdi);
1973 if (retval)
1974 return retval;
1975 retval = ftdi_elan_flush_input_fifo(ftdi);
1976 if (retval)
1977 return retval;
1978 reset:retval = ftdi_elan_synchronize_reset(ftdi);
1979 if (retval)
1980 return retval;
1981 read_stop = 100;
1982 read_stuck = 10;
1983 read:{
1984 int packet_bytes = 0;
1985 retval = usb_bulk_msg(ftdi->udev,
1986 usb_rcvbulkpipe(ftdi->udev,
1987 ftdi->bulk_in_endpointAddr),
1988 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1989 &packet_bytes, 500);
1990 if (packet_bytes > 2) {
1991 char diag[30 *3 + 4];
1992 char *d = diag;
1993 int m = (sizeof(diag) - 1) / 3 - 1;
1994 char *b = ftdi->bulk_in_buffer;
1995 int bytes_read = 0;
1996 unsigned char c = 0;
1997 diag[0] = 0;
1998 while (packet_bytes-- > 0) {
1999 c = *b++;
2000 if (bytes_read < m) {
2001 d += sprintf(d, " %02X", c);
2002 } else if (bytes_read > m) {
2003 } else
2004 d += sprintf(d, " ..");
2005 bytes_read += 1;
2006 continue;
2007 }
2008 if (c == 0x7E) {
2009 return 0;
2010 } else {
2011 if (c == 0x55) {
2012 goto read;
2013 } else if (read_stop-- > 0) {
2014 goto read;
2015 } else {
2016 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2017 continue;
2018 }
2019 }
2020 } else if (packet_bytes > 1) {
2021 unsigned char s1 = ftdi->bulk_in_buffer[0];
2022 unsigned char s2 = ftdi->bulk_in_buffer[1];
2023 if (s1 == 0x31 && s2 == 0x00) {
2024 if (read_stuck-- > 0) {
2025 goto read;
2026 } else
2027 goto reset;
2028 } else {
2029 if (read_stop-- > 0) {
2030 goto read;
2031 } else {
2032 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2033 continue;
2034 }
2035 }
2036 } else if (packet_bytes > 0) {
2037 if (read_stop-- > 0) {
2038 goto read;
2039 } else {
2040 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2041 continue;
2042 }
2043 } else if (retval == -ETIMEDOUT) {
2044 if (retry_on_timeout-- > 0) {
2045 goto read;
2046 } else {
2047 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2048 continue;
2049 }
2050 } else if (retval == 0) {
2051 if (retry_on_empty-- > 0) {
2052 goto read;
2053 } else {
2054 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2055 continue;
2056 }
2057 } else {
2058 err_count += 1;
2059 dev_err(&ftdi->udev->dev, "error = %d\n",
2060 retval);
2061 if (read_stop-- > 0) {
2062 goto read;
2063 } else {
2064 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2065 continue;
2066 }
2067 }
2068 }
2069 }
2070 dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2071 return -EFAULT;
2072 }
2073
2074 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2075 {
2076 int retry_on_empty = 10;
2077 int retry_on_timeout = 5;
2078 int retry_on_status = 50;
2079 more:{
2080 int packet_bytes = 0;
2081 int retval = usb_bulk_msg(ftdi->udev,
2082 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2083 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2084 &packet_bytes, 1000);
2085 if (packet_bytes > 2) {
2086 char diag[30 *3 + 4];
2087 char *d = diag;
2088 int m = (sizeof(diag) - 1) / 3 - 1;
2089 char *b = ftdi->bulk_in_buffer;
2090 int bytes_read = 0;
2091 diag[0] = 0;
2092 while (packet_bytes-- > 0) {
2093 char c = *b++;
2094 if (bytes_read < m) {
2095 d += sprintf(d, " %02X",
2096 0x000000FF & c);
2097 } else if (bytes_read > m) {
2098 } else
2099 d += sprintf(d, " ..");
2100 bytes_read += 1;
2101 continue;
2102 }
2103 goto more;
2104 } else if (packet_bytes > 1) {
2105 char s1 = ftdi->bulk_in_buffer[0];
2106 char s2 = ftdi->bulk_in_buffer[1];
2107 if (s1 == 0x31 && s2 == 0x60) {
2108 return 0;
2109 } else if (retry_on_status-- > 0) {
2110 msleep(5);
2111 goto more;
2112 } else
2113 return -EFAULT;
2114 } else if (packet_bytes > 0) {
2115 char b1 = ftdi->bulk_in_buffer[0];
2116 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2117 if (retry_on_status-- > 0) {
2118 msleep(5);
2119 goto more;
2120 } else {
2121 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2122 return -EFAULT;
2123 }
2124 } else if (retval == -ETIMEDOUT) {
2125 if (retry_on_timeout-- > 0) {
2126 goto more;
2127 } else {
2128 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2129 return -ENOMEM;
2130 }
2131 } else if (retval == 0) {
2132 if (retry_on_empty-- > 0) {
2133 goto more;
2134 } else {
2135 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2136 return -ENOMEM;
2137 }
2138 } else {
2139 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2140 return -ENOMEM;
2141 }
2142 }
2143 return -1;
2144 }
2145
2146 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2147 {
2148 int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2149 if (UxxxStatus)
2150 return UxxxStatus;
2151 if (ftdi->controlreg & 0x00400000) {
2152 if (ftdi->card_ejected) {
2153 } else {
2154 ftdi->card_ejected = 1;
2155 dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2156 ftdi->controlreg);
2157 }
2158 return -ENODEV;
2159 } else {
2160 u8 fn = ftdi->function - 1;
2161 int activePCIfn = fn << 8;
2162 u32 pcidata;
2163 u32 pciVID;
2164 u32 pciPID;
2165 int reg = 0;
2166 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2167 &pcidata);
2168 if (UxxxStatus)
2169 return UxxxStatus;
2170 pciVID = pcidata & 0xFFFF;
2171 pciPID = (pcidata >> 16) & 0xFFFF;
2172 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2173 ftdi->platform_data.device) {
2174 return 0;
2175 } else {
2176 dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2177 ftdi->platform_data.vendor, pciVID,
2178 ftdi->platform_data.device, pciPID);
2179 return -ENODEV;
2180 }
2181 }
2182 }
2183
2184
2185 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2186 offsetof(struct ohci_regs, member), 0, data);
2187 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2188 offsetof(struct ohci_regs, member), 0, data);
2189
2190 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2191 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2192 OHCI_INTR_WDH)
2193 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2194 {
2195 int devices = 0;
2196 int retval;
2197 u32 hc_control;
2198 int num_ports;
2199 u32 control;
2200 u32 rh_a = -1;
2201 u32 status;
2202 u32 fminterval;
2203 u32 hc_fminterval;
2204 u32 periodicstart;
2205 u32 cmdstatus;
2206 u32 roothub_a;
2207 int mask = OHCI_INTR_INIT;
2208 int sleep_time = 0;
2209 int reset_timeout = 30; /* ... allow extra time */
2210 int temp;
2211 retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2212 if (retval)
2213 return retval;
2214 retval = ftdi_read_pcimem(ftdi, control, &control);
2215 if (retval)
2216 return retval;
2217 retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2218 if (retval)
2219 return retval;
2220 num_ports = rh_a & RH_A_NDP;
2221 retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2222 if (retval)
2223 return retval;
2224 hc_fminterval &= 0x3fff;
2225 if (hc_fminterval != FI) {
2226 }
2227 hc_fminterval |= FSMP(hc_fminterval) << 16;
2228 retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2229 if (retval)
2230 return retval;
2231 switch (hc_control & OHCI_CTRL_HCFS) {
2232 case OHCI_USB_OPER:
2233 sleep_time = 0;
2234 break;
2235 case OHCI_USB_SUSPEND:
2236 case OHCI_USB_RESUME:
2237 hc_control &= OHCI_CTRL_RWC;
2238 hc_control |= OHCI_USB_RESUME;
2239 sleep_time = 10;
2240 break;
2241 default:
2242 hc_control &= OHCI_CTRL_RWC;
2243 hc_control |= OHCI_USB_RESET;
2244 sleep_time = 50;
2245 break;
2246 }
2247 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2248 if (retval)
2249 return retval;
2250 retval = ftdi_read_pcimem(ftdi, control, &control);
2251 if (retval)
2252 return retval;
2253 msleep(sleep_time);
2254 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2255 if (retval)
2256 return retval;
2257 if (!(roothub_a & RH_A_NPS)) { /* power down each port */
2258 for (temp = 0; temp < num_ports; temp++) {
2259 retval = ftdi_write_pcimem(ftdi,
2260 roothub.portstatus[temp], RH_PS_LSDA);
2261 if (retval)
2262 return retval;
2263 }
2264 }
2265 retval = ftdi_read_pcimem(ftdi, control, &control);
2266 if (retval)
2267 return retval;
2268 retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2269 if (retval)
2270 return retval;
2271 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2272 if (retval)
2273 return retval;
2274 extra:{
2275 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2276 if (retval)
2277 return retval;
2278 if (0 != (status & OHCI_HCR)) {
2279 if (--reset_timeout == 0) {
2280 dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2281 return -ENODEV;
2282 } else {
2283 msleep(5);
2284 goto extra;
2285 }
2286 }
2287 }
2288 if (quirk & OHCI_QUIRK_INITRESET) {
2289 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2290 if (retval)
2291 return retval;
2292 retval = ftdi_read_pcimem(ftdi, control, &control);
2293 if (retval)
2294 return retval;
2295 }
2296 retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2297 if (retval)
2298 return retval;
2299 retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2300 if (retval)
2301 return retval;
2302 retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2303 if (retval)
2304 return retval;
2305 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2306 if (retval)
2307 return retval;
2308 retval = ftdi_write_pcimem(ftdi, fminterval,
2309 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2310 if (retval)
2311 return retval;
2312 retval = ftdi_write_pcimem(ftdi, periodicstart,
2313 ((9 *hc_fminterval) / 10) & 0x3fff);
2314 if (retval)
2315 return retval;
2316 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2317 if (retval)
2318 return retval;
2319 retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2320 if (retval)
2321 return retval;
2322 if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2323 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2324 quirk |= OHCI_QUIRK_INITRESET;
2325 goto retry;
2326 } else
2327 dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2328 fminterval, periodicstart);
2329 } /* start controller operations */
2330 hc_control &= OHCI_CTRL_RWC;
2331 hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2332 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2333 if (retval)
2334 return retval;
2335 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2336 if (retval)
2337 return retval;
2338 retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2339 if (retval)
2340 return retval;
2341 retval = ftdi_read_pcimem(ftdi, control, &control);
2342 if (retval)
2343 return retval;
2344 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2345 if (retval)
2346 return retval;
2347 retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2348 if (retval)
2349 return retval;
2350 retval = ftdi_write_pcimem(ftdi, intrdisable,
2351 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2352 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2353 OHCI_INTR_SO);
2354 if (retval)
2355 return retval; /* handle root hub init quirks ... */
2356 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2357 if (retval)
2358 return retval;
2359 roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2360 if (quirk & OHCI_QUIRK_SUPERIO) {
2361 roothub_a |= RH_A_NOCP;
2362 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2363 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2364 if (retval)
2365 return retval;
2366 } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2367 roothub_a |= RH_A_NPS;
2368 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2369 if (retval)
2370 return retval;
2371 }
2372 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2373 if (retval)
2374 return retval;
2375 retval = ftdi_write_pcimem(ftdi, roothub.b,
2376 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2377 if (retval)
2378 return retval;
2379 retval = ftdi_read_pcimem(ftdi, control, &control);
2380 if (retval)
2381 return retval;
2382 mdelay((roothub_a >> 23) & 0x1fe);
2383 for (temp = 0; temp < num_ports; temp++) {
2384 u32 portstatus;
2385 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2386 &portstatus);
2387 if (retval)
2388 return retval;
2389 if (1 & portstatus)
2390 devices += 1;
2391 }
2392 return devices;
2393 }
2394
2395 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2396 {
2397 u32 latence_timer;
2398 int UxxxStatus;
2399 u32 pcidata;
2400 int reg = 0;
2401 int activePCIfn = fn << 8;
2402 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2403 if (UxxxStatus)
2404 return UxxxStatus;
2405 reg = 16;
2406 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2407 0xFFFFFFFF);
2408 if (UxxxStatus)
2409 return UxxxStatus;
2410 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2411 &pcidata);
2412 if (UxxxStatus)
2413 return UxxxStatus;
2414 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2415 0xF0000000);
2416 if (UxxxStatus)
2417 return UxxxStatus;
2418 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2419 &pcidata);
2420 if (UxxxStatus)
2421 return UxxxStatus;
2422 reg = 12;
2423 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2424 &latence_timer);
2425 if (UxxxStatus)
2426 return UxxxStatus;
2427 latence_timer &= 0xFFFF00FF;
2428 latence_timer |= 0x00001600;
2429 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2430 latence_timer);
2431 if (UxxxStatus)
2432 return UxxxStatus;
2433 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2434 &pcidata);
2435 if (UxxxStatus)
2436 return UxxxStatus;
2437 reg = 4;
2438 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2439 0x06);
2440 if (UxxxStatus)
2441 return UxxxStatus;
2442 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2443 &pcidata);
2444 if (UxxxStatus)
2445 return UxxxStatus;
2446 for (reg = 0; reg <= 0x54; reg += 4) {
2447 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2448 if (UxxxStatus)
2449 return UxxxStatus;
2450 }
2451 return 0;
2452 }
2453
2454 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2455 {
2456 u32 latence_timer;
2457 int UxxxStatus;
2458 u32 pcidata;
2459 int reg = 0;
2460 int activePCIfn = fn << 8;
2461 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2462 if (UxxxStatus)
2463 return UxxxStatus;
2464 reg = 16;
2465 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2466 0xFFFFFFFF);
2467 if (UxxxStatus)
2468 return UxxxStatus;
2469 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2470 &pcidata);
2471 if (UxxxStatus)
2472 return UxxxStatus;
2473 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2474 0x00000000);
2475 if (UxxxStatus)
2476 return UxxxStatus;
2477 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2478 &pcidata);
2479 if (UxxxStatus)
2480 return UxxxStatus;
2481 reg = 12;
2482 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2483 &latence_timer);
2484 if (UxxxStatus)
2485 return UxxxStatus;
2486 latence_timer &= 0xFFFF00FF;
2487 latence_timer |= 0x00001600;
2488 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2489 latence_timer);
2490 if (UxxxStatus)
2491 return UxxxStatus;
2492 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2493 &pcidata);
2494 if (UxxxStatus)
2495 return UxxxStatus;
2496 reg = 4;
2497 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2498 0x00);
2499 if (UxxxStatus)
2500 return UxxxStatus;
2501 return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2502 }
2503
2504 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2505 {
2506 int result;
2507 int UxxxStatus;
2508 UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2509 if (UxxxStatus)
2510 return UxxxStatus;
2511 result = ftdi_elan_check_controller(ftdi, quirk);
2512 UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2513 if (UxxxStatus)
2514 return UxxxStatus;
2515 return result;
2516 }
2517
2518 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2519 {
2520 u32 controlreg;
2521 u8 sensebits;
2522 int UxxxStatus;
2523 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2524 if (UxxxStatus)
2525 return UxxxStatus;
2526 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2527 if (UxxxStatus)
2528 return UxxxStatus;
2529 msleep(750);
2530 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2531 if (UxxxStatus)
2532 return UxxxStatus;
2533 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2534 if (UxxxStatus)
2535 return UxxxStatus;
2536 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2537 if (UxxxStatus)
2538 return UxxxStatus;
2539 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2540 if (UxxxStatus)
2541 return UxxxStatus;
2542 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2543 if (UxxxStatus)
2544 return UxxxStatus;
2545 msleep(250);
2546 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2547 if (UxxxStatus)
2548 return UxxxStatus;
2549 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2550 if (UxxxStatus)
2551 return UxxxStatus;
2552 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2553 if (UxxxStatus)
2554 return UxxxStatus;
2555 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2556 if (UxxxStatus)
2557 return UxxxStatus;
2558 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2559 if (UxxxStatus)
2560 return UxxxStatus;
2561 msleep(1000);
2562 sensebits = (controlreg >> 16) & 0x000F;
2563 if (0x0D == sensebits)
2564 return 0;
2565 else
2566 return - ENXIO;
2567 }
2568
2569 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2570 {
2571 int UxxxStatus;
2572 u32 pcidata;
2573 int reg = 0;
2574 u8 fn;
2575 int activePCIfn = 0;
2576 int max_devices = 0;
2577 int controllers = 0;
2578 int unrecognized = 0;
2579 ftdi->function = 0;
2580 for (fn = 0; (fn < 4); fn++) {
2581 u32 pciVID = 0;
2582 u32 pciPID = 0;
2583 int devices = 0;
2584 activePCIfn = fn << 8;
2585 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2586 &pcidata);
2587 if (UxxxStatus)
2588 return UxxxStatus;
2589 pciVID = pcidata & 0xFFFF;
2590 pciPID = (pcidata >> 16) & 0xFFFF;
2591 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2592 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2593 controllers += 1;
2594 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2595 {
2596 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2597 controllers += 1;
2598 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2599 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2600 controllers += 1;
2601 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2602 {
2603 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2604 controllers += 1;
2605 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2606 devices = ftdi_elan_found_controller(ftdi, fn,
2607 OHCI_QUIRK_AMD756);
2608 controllers += 1;
2609 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2610 devices = ftdi_elan_found_controller(ftdi, fn,
2611 OHCI_QUIRK_ZFMICRO);
2612 controllers += 1;
2613 } else if (0 == pcidata) {
2614 } else
2615 unrecognized += 1;
2616 if (devices > max_devices) {
2617 max_devices = devices;
2618 ftdi->function = fn + 1;
2619 ftdi->platform_data.vendor = pciVID;
2620 ftdi->platform_data.device = pciPID;
2621 }
2622 }
2623 if (ftdi->function > 0) {
2624 return ftdi_elan_setup_controller(ftdi, ftdi->function - 1);
2625 } else if (controllers > 0) {
2626 return -ENXIO;
2627 } else if (unrecognized > 0) {
2628 return -ENXIO;
2629 } else {
2630 ftdi->enumerated = 0;
2631 return -ENXIO;
2632 }
2633 }
2634
2635
2636 /*
2637 * we use only the first bulk-in and bulk-out endpoints
2638 */
2639 static int ftdi_elan_probe(struct usb_interface *interface,
2640 const struct usb_device_id *id)
2641 {
2642 struct usb_host_interface *iface_desc;
2643 struct usb_endpoint_descriptor *bulk_in, *bulk_out;
2644 int retval;
2645 struct usb_ftdi *ftdi;
2646
2647 ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2648 if (!ftdi)
2649 return -ENOMEM;
2650
2651 mutex_lock(&ftdi_module_lock);
2652 list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2653 ftdi->sequence_num = ++ftdi_instances;
2654 mutex_unlock(&ftdi_module_lock);
2655 ftdi_elan_init_kref(ftdi);
2656 sema_init(&ftdi->sw_lock, 1);
2657 ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2658 ftdi->interface = interface;
2659 mutex_init(&ftdi->u132_lock);
2660 ftdi->expected = 4;
2661
2662 iface_desc = interface->cur_altsetting;
2663 retval = usb_find_common_endpoints(iface_desc,
2664 &bulk_in, &bulk_out, NULL, NULL);
2665 if (retval) {
2666 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2667 goto error;
2668 }
2669
2670 ftdi->bulk_in_size = usb_endpoint_maxp(bulk_in);
2671 ftdi->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
2672 ftdi->bulk_in_buffer = kmalloc(ftdi->bulk_in_size, GFP_KERNEL);
2673 if (!ftdi->bulk_in_buffer) {
2674 retval = -ENOMEM;
2675 goto error;
2676 }
2677
2678 ftdi->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
2679
2680 dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2681 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2682 ftdi->bulk_out_endpointAddr);
2683 usb_set_intfdata(interface, ftdi);
2684 if (iface_desc->desc.bInterfaceNumber == 0 &&
2685 ftdi->bulk_in_endpointAddr == 0x81 &&
2686 ftdi->bulk_out_endpointAddr == 0x02) {
2687 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2688 if (retval) {
2689 dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2690 usb_set_intfdata(interface, NULL);
2691 retval = -ENOMEM;
2692 goto error;
2693 } else {
2694 ftdi->class = &ftdi_elan_jtag_class;
2695 dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2696 ftdi, iface_desc->desc.bInterfaceNumber,
2697 interface->minor);
2698 return 0;
2699 }
2700 } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2701 ftdi->bulk_in_endpointAddr == 0x83 &&
2702 ftdi->bulk_out_endpointAddr == 0x04) {
2703 ftdi->class = NULL;
2704 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2705 ftdi, iface_desc->desc.bInterfaceNumber);
2706 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2707 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2708 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2709 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2710 return 0;
2711 } else {
2712 dev_err(&ftdi->udev->dev,
2713 "Could not find ELAN's U132 device\n");
2714 retval = -ENODEV;
2715 goto error;
2716 }
2717 error:if (ftdi) {
2718 ftdi_elan_put_kref(ftdi);
2719 }
2720 return retval;
2721 }
2722
2723 static void ftdi_elan_disconnect(struct usb_interface *interface)
2724 {
2725 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2726 ftdi->disconnected += 1;
2727 if (ftdi->class) {
2728 int minor = interface->minor;
2729 struct usb_class_driver *class = ftdi->class;
2730 usb_set_intfdata(interface, NULL);
2731 usb_deregister_dev(interface, class);
2732 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2733 minor);
2734 } else {
2735 ftdi_status_cancel_work(ftdi);
2736 ftdi_command_cancel_work(ftdi);
2737 ftdi_response_cancel_work(ftdi);
2738 ftdi_elan_abandon_completions(ftdi);
2739 ftdi_elan_abandon_targets(ftdi);
2740 if (ftdi->registered) {
2741 platform_device_unregister(&ftdi->platform_dev);
2742 ftdi->synchronized = 0;
2743 ftdi->enumerated = 0;
2744 ftdi->initialized = 0;
2745 ftdi->registered = 0;
2746 }
2747 ftdi->disconnected += 1;
2748 usb_set_intfdata(interface, NULL);
2749 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2750 }
2751 ftdi_elan_put_kref(ftdi);
2752 }
2753
2754 static struct usb_driver ftdi_elan_driver = {
2755 .name = "ftdi-elan",
2756 .probe = ftdi_elan_probe,
2757 .disconnect = ftdi_elan_disconnect,
2758 .id_table = ftdi_elan_table,
2759 };
2760 static int __init ftdi_elan_init(void)
2761 {
2762 int result;
2763 pr_info("driver %s\n", ftdi_elan_driver.name);
2764 mutex_init(&ftdi_module_lock);
2765 INIT_LIST_HEAD(&ftdi_static_list);
2766 result = usb_register(&ftdi_elan_driver);
2767 if (result) {
2768 pr_err("usb_register failed. Error number %d\n", result);
2769 }
2770 return result;
2771
2772 }
2773
2774 static void __exit ftdi_elan_exit(void)
2775 {
2776 struct usb_ftdi *ftdi;
2777 struct usb_ftdi *temp;
2778 usb_deregister(&ftdi_elan_driver);
2779 pr_info("ftdi_u132 driver deregistered\n");
2780 list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2781 ftdi_status_cancel_work(ftdi);
2782 ftdi_command_cancel_work(ftdi);
2783 ftdi_response_cancel_work(ftdi);
2784 }
2785 }
2786
2787
2788 module_init(ftdi_elan_init);
2789 module_exit(ftdi_elan_exit);
Linux with added FPC-III support