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Merge tag 'for-linus-20190706' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / usb / misc / ftdi-elan.c
blob257efacf3551ab02fb67261a04e02bcd36dbc573
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
4 *
5 * Copyright(C) 2006 Elan Digital Systems Limited
6 * http://www.elandigitalsystems.com
7 *
8 * Author and Maintainer - Tony Olech - Elan Digital Systems
9 * tony.olech@elandigitalsystems.com
10 *
11 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
12 * based on various USB client drivers in the 2.6.15 linux kernel
13 * with constant reference to the 3rd Edition of Linux Device Drivers
14 * published by O'Reilly
15 *
16 * The U132 adapter is a USB to CardBus adapter specifically designed
17 * for PC cards that contain an OHCI host controller. Typical PC cards
18 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
19 *
20 * The U132 adapter will *NOT *work with PC cards that do not contain
21 * an OHCI controller. A simple way to test whether a PC card has an
22 * OHCI controller as an interface is to insert the PC card directly
23 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
24 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
25 * then there is a good chance that the U132 adapter will support the
26 * PC card.(you also need the specific client driver for the PC card)
27 *
28 * Please inform the Author and Maintainer about any PC cards that
29 * contain OHCI Host Controller and work when directly connected to
30 * an embedded CardBus slot but do not work when they are connected
31 * via an ELAN U132 adapter.
32 *
33 */
34
35 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36
37 #include <linux/kernel.h>
38 #include <linux/errno.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
41 #include <linux/ioctl.h>
42 #include <linux/pci_ids.h>
43 #include <linux/slab.h>
44 #include <linux/module.h>
45 #include <linux/kref.h>
46 #include <linux/mutex.h>
47 #include <linux/uaccess.h>
48 #include <linux/usb.h>
49 #include <linux/workqueue.h>
50 #include <linux/platform_device.h>
51 MODULE_AUTHOR("Tony Olech");
52 MODULE_DESCRIPTION("FTDI ELAN driver");
53 MODULE_LICENSE("GPL");
54 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
55 static bool distrust_firmware = 1;
56 module_param(distrust_firmware, bool, 0);
57 MODULE_PARM_DESC(distrust_firmware,
58 "true to distrust firmware power/overcurrent setup");
59 extern struct platform_driver u132_platform_driver;
60 /*
61 * ftdi_module_lock exists to protect access to global variables
62 *
63 */
64 static struct mutex ftdi_module_lock;
65 static int ftdi_instances = 0;
66 static struct list_head ftdi_static_list;
67 /*
68 * end of the global variables protected by ftdi_module_lock
69 */
70 #include "usb_u132.h"
71 #include <asm/io.h>
72 #include <linux/usb/hcd.h>
73
74 /* FIXME ohci.h is ONLY for internal use by the OHCI driver.
75 * If you're going to try stuff like this, you need to split
76 * out shareable stuff (register declarations?) into its own
77 * file, maybe name <linux/usb/ohci.h>
78 */
79
80 #include "../host/ohci.h"
81 /* Define these values to match your devices*/
82 #define USB_FTDI_ELAN_VENDOR_ID 0x0403
83 #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
84 /* table of devices that work with this driver*/
85 static const struct usb_device_id ftdi_elan_table[] = {
86 {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
87 { /* Terminating entry */ }
88 };
89
90 MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
91 /* only the jtag(firmware upgrade device) interface requires
92 * a device file and corresponding minor number, but the
93 * interface is created unconditionally - I suppose it could
94 * be configured or not according to a module parameter.
95 * But since we(now) require one interface per device,
96 * and since it unlikely that a normal installation would
97 * require more than a couple of elan-ftdi devices, 8 seems
98 * like a reasonable limit to have here, and if someone
99 * really requires more than 8 devices, then they can frig the
100 * code and recompile
101 */
102 #define USB_FTDI_ELAN_MINOR_BASE 192
103 #define COMMAND_BITS 5
104 #define COMMAND_SIZE (1<<COMMAND_BITS)
105 #define COMMAND_MASK (COMMAND_SIZE-1)
106 struct u132_command {
107 u8 header;
108 u16 length;
109 u8 address;
110 u8 width;
111 u32 value;
112 int follows;
113 void *buffer;
114 };
115 #define RESPOND_BITS 5
116 #define RESPOND_SIZE (1<<RESPOND_BITS)
117 #define RESPOND_MASK (RESPOND_SIZE-1)
118 struct u132_respond {
119 u8 header;
120 u8 address;
121 u32 *value;
122 int *result;
123 struct completion wait_completion;
124 };
125 struct u132_target {
126 void *endp;
127 struct urb *urb;
128 int toggle_bits;
129 int error_count;
130 int condition_code;
131 int repeat_number;
132 int halted;
133 int skipped;
134 int actual;
135 int non_null;
136 int active;
137 int abandoning;
138 void (*callback)(void *endp, struct urb *urb, u8 *buf, int len,
139 int toggle_bits, int error_count, int condition_code,
140 int repeat_number, int halted, int skipped, int actual,
141 int non_null);
142 };
143 /* Structure to hold all of our device specific stuff*/
144 struct usb_ftdi {
145 struct list_head ftdi_list;
146 struct mutex u132_lock;
147 int command_next;
148 int command_head;
149 struct u132_command command[COMMAND_SIZE];
150 int respond_next;
151 int respond_head;
152 struct u132_respond respond[RESPOND_SIZE];
153 struct u132_target target[4];
154 char device_name[16];
155 unsigned synchronized:1;
156 unsigned enumerated:1;
157 unsigned registered:1;
158 unsigned initialized:1;
159 unsigned card_ejected:1;
160 int function;
161 int sequence_num;
162 int disconnected;
163 int gone_away;
164 int stuck_status;
165 int status_queue_delay;
166 struct semaphore sw_lock;
167 struct usb_device *udev;
168 struct usb_interface *interface;
169 struct usb_class_driver *class;
170 struct delayed_work status_work;
171 struct delayed_work command_work;
172 struct delayed_work respond_work;
173 struct u132_platform_data platform_data;
174 struct resource resources[0];
175 struct platform_device platform_dev;
176 unsigned char *bulk_in_buffer;
177 size_t bulk_in_size;
178 size_t bulk_in_last;
179 size_t bulk_in_left;
180 __u8 bulk_in_endpointAddr;
181 __u8 bulk_out_endpointAddr;
182 struct kref kref;
183 u32 controlreg;
184 u8 response[4 + 1024];
185 int expected;
186 int received;
187 int ed_found;
188 };
189 #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
190 #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
191 platform_dev)
192 static struct usb_driver ftdi_elan_driver;
193 static void ftdi_elan_delete(struct kref *kref)
194 {
195 struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
196 dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
197 usb_put_dev(ftdi->udev);
198 ftdi->disconnected += 1;
199 mutex_lock(&ftdi_module_lock);
200 list_del_init(&ftdi->ftdi_list);
201 ftdi_instances -= 1;
202 mutex_unlock(&ftdi_module_lock);
203 kfree(ftdi->bulk_in_buffer);
204 ftdi->bulk_in_buffer = NULL;
205 }
206
207 static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
208 {
209 kref_put(&ftdi->kref, ftdi_elan_delete);
210 }
211
212 static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
213 {
214 kref_get(&ftdi->kref);
215 }
216
217 static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
218 {
219 kref_init(&ftdi->kref);
220 }
221
222 static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
223 {
224 if (!schedule_delayed_work(&ftdi->status_work, delta))
225 kref_put(&ftdi->kref, ftdi_elan_delete);
226 }
227
228 static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
229 {
230 if (schedule_delayed_work(&ftdi->status_work, delta))
231 kref_get(&ftdi->kref);
232 }
233
234 static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
235 {
236 if (cancel_delayed_work_sync(&ftdi->status_work))
237 kref_put(&ftdi->kref, ftdi_elan_delete);
238 }
239
240 static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
241 {
242 if (!schedule_delayed_work(&ftdi->command_work, delta))
243 kref_put(&ftdi->kref, ftdi_elan_delete);
244 }
245
246 static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
247 {
248 if (schedule_delayed_work(&ftdi->command_work, delta))
249 kref_get(&ftdi->kref);
250 }
251
252 static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
253 {
254 if (cancel_delayed_work_sync(&ftdi->command_work))
255 kref_put(&ftdi->kref, ftdi_elan_delete);
256 }
257
258 static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
259 unsigned int delta)
260 {
261 if (!schedule_delayed_work(&ftdi->respond_work, delta))
262 kref_put(&ftdi->kref, ftdi_elan_delete);
263 }
264
265 static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
266 {
267 if (schedule_delayed_work(&ftdi->respond_work, delta))
268 kref_get(&ftdi->kref);
269 }
270
271 static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
272 {
273 if (cancel_delayed_work_sync(&ftdi->respond_work))
274 kref_put(&ftdi->kref, ftdi_elan_delete);
275 }
276
277 void ftdi_elan_gone_away(struct platform_device *pdev)
278 {
279 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
280 ftdi->gone_away += 1;
281 ftdi_elan_put_kref(ftdi);
282 }
283
284
285 EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
286 static void ftdi_release_platform_dev(struct device *dev)
287 {
288 dev->parent = NULL;
289 }
290
291 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
292 struct u132_target *target, u8 *buffer, int length);
293 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
294 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
295 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
296 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
297 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
298 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
299 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
300 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
301 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
302 static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
303 {
304 if (ftdi->platform_dev.dev.parent)
305 return -EBUSY;
306
307 ftdi_elan_get_kref(ftdi);
308 ftdi->platform_data.potpg = 100;
309 ftdi->platform_data.reset = NULL;
310 ftdi->platform_dev.id = ftdi->sequence_num;
311 ftdi->platform_dev.resource = ftdi->resources;
312 ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
313 ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
314 ftdi->platform_dev.dev.parent = NULL;
315 ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
316 ftdi->platform_dev.dev.dma_mask = NULL;
317 snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
318 ftdi->platform_dev.name = ftdi->device_name;
319 dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
320 request_module("u132_hcd");
321 dev_info(&ftdi->udev->dev, "registering '%s'\n",
322 ftdi->platform_dev.name);
323
324 return platform_device_register(&ftdi->platform_dev);
325 }
326
327 static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
328 {
329 mutex_lock(&ftdi->u132_lock);
330 while (ftdi->respond_next > ftdi->respond_head) {
331 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
332 ftdi->respond_head++];
333 *respond->result = -ESHUTDOWN;
334 *respond->value = 0;
335 complete(&respond->wait_completion);
336 } mutex_unlock(&ftdi->u132_lock);
337 }
338
339 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
340 {
341 int ed_number = 4;
342 mutex_lock(&ftdi->u132_lock);
343 while (ed_number-- > 0) {
344 struct u132_target *target = &ftdi->target[ed_number];
345 if (target->active == 1) {
346 target->condition_code = TD_DEVNOTRESP;
347 mutex_unlock(&ftdi->u132_lock);
348 ftdi_elan_do_callback(ftdi, target, NULL, 0);
349 mutex_lock(&ftdi->u132_lock);
350 }
351 }
352 ftdi->received = 0;
353 ftdi->expected = 4;
354 ftdi->ed_found = 0;
355 mutex_unlock(&ftdi->u132_lock);
356 }
357
358 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
359 {
360 int ed_number = 4;
361 mutex_lock(&ftdi->u132_lock);
362 while (ed_number-- > 0) {
363 struct u132_target *target = &ftdi->target[ed_number];
364 target->abandoning = 1;
365 wait_1:if (target->active == 1) {
366 int command_size = ftdi->command_next -
367 ftdi->command_head;
368 if (command_size < COMMAND_SIZE) {
369 struct u132_command *command = &ftdi->command[
370 COMMAND_MASK & ftdi->command_next];
371 command->header = 0x80 | (ed_number << 5) | 0x4;
372 command->length = 0x00;
373 command->address = 0x00;
374 command->width = 0x00;
375 command->follows = 0;
376 command->value = 0;
377 command->buffer = &command->value;
378 ftdi->command_next += 1;
379 ftdi_elan_kick_command_queue(ftdi);
380 } else {
381 mutex_unlock(&ftdi->u132_lock);
382 msleep(100);
383 mutex_lock(&ftdi->u132_lock);
384 goto wait_1;
385 }
386 }
387 wait_2:if (target->active == 1) {
388 int command_size = ftdi->command_next -
389 ftdi->command_head;
390 if (command_size < COMMAND_SIZE) {
391 struct u132_command *command = &ftdi->command[
392 COMMAND_MASK & ftdi->command_next];
393 command->header = 0x90 | (ed_number << 5);
394 command->length = 0x00;
395 command->address = 0x00;
396 command->width = 0x00;
397 command->follows = 0;
398 command->value = 0;
399 command->buffer = &command->value;
400 ftdi->command_next += 1;
401 ftdi_elan_kick_command_queue(ftdi);
402 } else {
403 mutex_unlock(&ftdi->u132_lock);
404 msleep(100);
405 mutex_lock(&ftdi->u132_lock);
406 goto wait_2;
407 }
408 }
409 }
410 ftdi->received = 0;
411 ftdi->expected = 4;
412 ftdi->ed_found = 0;
413 mutex_unlock(&ftdi->u132_lock);
414 }
415
416 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
417 {
418 int ed_number = 4;
419 mutex_lock(&ftdi->u132_lock);
420 while (ed_number-- > 0) {
421 struct u132_target *target = &ftdi->target[ed_number];
422 target->abandoning = 1;
423 wait:if (target->active == 1) {
424 int command_size = ftdi->command_next -
425 ftdi->command_head;
426 if (command_size < COMMAND_SIZE) {
427 struct u132_command *command = &ftdi->command[
428 COMMAND_MASK & ftdi->command_next];
429 command->header = 0x80 | (ed_number << 5) | 0x4;
430 command->length = 0x00;
431 command->address = 0x00;
432 command->width = 0x00;
433 command->follows = 0;
434 command->value = 0;
435 command->buffer = &command->value;
436 ftdi->command_next += 1;
437 ftdi_elan_kick_command_queue(ftdi);
438 } else {
439 mutex_unlock(&ftdi->u132_lock);
440 msleep(100);
441 mutex_lock(&ftdi->u132_lock);
442 goto wait;
443 }
444 }
445 }
446 ftdi->received = 0;
447 ftdi->expected = 4;
448 ftdi->ed_found = 0;
449 mutex_unlock(&ftdi->u132_lock);
450 }
451
452 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
453 {
454 ftdi_command_queue_work(ftdi, 0);
455 }
456
457 static void ftdi_elan_command_work(struct work_struct *work)
458 {
459 struct usb_ftdi *ftdi =
460 container_of(work, struct usb_ftdi, command_work.work);
461
462 if (ftdi->disconnected > 0) {
463 ftdi_elan_put_kref(ftdi);
464 return;
465 } else {
466 int retval = ftdi_elan_command_engine(ftdi);
467 if (retval == -ESHUTDOWN) {
468 ftdi->disconnected += 1;
469 } else if (retval == -ENODEV) {
470 ftdi->disconnected += 1;
471 } else if (retval)
472 dev_err(&ftdi->udev->dev, "command error %d\n", retval);
473 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
474 return;
475 }
476 }
477
478 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
479 {
480 ftdi_respond_queue_work(ftdi, 0);
481 }
482
483 static void ftdi_elan_respond_work(struct work_struct *work)
484 {
485 struct usb_ftdi *ftdi =
486 container_of(work, struct usb_ftdi, respond_work.work);
487 if (ftdi->disconnected > 0) {
488 ftdi_elan_put_kref(ftdi);
489 return;
490 } else {
491 int retval = ftdi_elan_respond_engine(ftdi);
492 if (retval == 0) {
493 } else if (retval == -ESHUTDOWN) {
494 ftdi->disconnected += 1;
495 } else if (retval == -ENODEV) {
496 ftdi->disconnected += 1;
497 } else if (retval == -EILSEQ) {
498 ftdi->disconnected += 1;
499 } else {
500 ftdi->disconnected += 1;
501 dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
502 }
503 if (ftdi->disconnected > 0) {
504 ftdi_elan_abandon_completions(ftdi);
505 ftdi_elan_abandon_targets(ftdi);
506 }
507 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
508 return;
509 }
510 }
511
512
513 /*
514 * the sw_lock is initially held and will be freed
515 * after the FTDI has been synchronized
516 *
517 */
518 static void ftdi_elan_status_work(struct work_struct *work)
519 {
520 struct usb_ftdi *ftdi =
521 container_of(work, struct usb_ftdi, status_work.work);
522 int work_delay_in_msec = 0;
523 if (ftdi->disconnected > 0) {
524 ftdi_elan_put_kref(ftdi);
525 return;
526 } else if (ftdi->synchronized == 0) {
527 down(&ftdi->sw_lock);
528 if (ftdi_elan_synchronize(ftdi) == 0) {
529 ftdi->synchronized = 1;
530 ftdi_command_queue_work(ftdi, 1);
531 ftdi_respond_queue_work(ftdi, 1);
532 up(&ftdi->sw_lock);
533 work_delay_in_msec = 100;
534 } else {
535 dev_err(&ftdi->udev->dev, "synchronize failed\n");
536 up(&ftdi->sw_lock);
537 work_delay_in_msec = 10 *1000;
538 }
539 } else if (ftdi->stuck_status > 0) {
540 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
541 ftdi->stuck_status = 0;
542 ftdi->synchronized = 0;
543 } else if ((ftdi->stuck_status++ % 60) == 1) {
544 dev_err(&ftdi->udev->dev, "WRONG type of card inserted - please remove\n");
545 } else
546 dev_err(&ftdi->udev->dev, "WRONG type of card inserted - checked %d times\n",
547 ftdi->stuck_status);
548 work_delay_in_msec = 100;
549 } else if (ftdi->enumerated == 0) {
550 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
551 ftdi->enumerated = 1;
552 work_delay_in_msec = 250;
553 } else
554 work_delay_in_msec = 1000;
555 } else if (ftdi->initialized == 0) {
556 if (ftdi_elan_setupOHCI(ftdi) == 0) {
557 ftdi->initialized = 1;
558 work_delay_in_msec = 500;
559 } else {
560 dev_err(&ftdi->udev->dev, "initialized failed - trying again in 10 seconds\n");
561 work_delay_in_msec = 1 *1000;
562 }
563 } else if (ftdi->registered == 0) {
564 work_delay_in_msec = 10;
565 if (ftdi_elan_hcd_init(ftdi) == 0) {
566 ftdi->registered = 1;
567 } else
568 dev_err(&ftdi->udev->dev, "register failed\n");
569 work_delay_in_msec = 250;
570 } else {
571 if (ftdi_elan_checkingPCI(ftdi) == 0) {
572 work_delay_in_msec = 250;
573 } else if (ftdi->controlreg & 0x00400000) {
574 if (ftdi->gone_away > 0) {
575 dev_err(&ftdi->udev->dev, "PCI device eject confirmed platform_dev.dev.parent=%p platform_dev.dev=%p\n",
576 ftdi->platform_dev.dev.parent,
577 &ftdi->platform_dev.dev);
578 platform_device_unregister(&ftdi->platform_dev);
579 ftdi->platform_dev.dev.parent = NULL;
580 ftdi->registered = 0;
581 ftdi->enumerated = 0;
582 ftdi->card_ejected = 0;
583 ftdi->initialized = 0;
584 ftdi->gone_away = 0;
585 } else
586 ftdi_elan_flush_targets(ftdi);
587 work_delay_in_msec = 250;
588 } else {
589 dev_err(&ftdi->udev->dev, "PCI device has disappeared\n");
590 ftdi_elan_cancel_targets(ftdi);
591 work_delay_in_msec = 500;
592 ftdi->enumerated = 0;
593 ftdi->initialized = 0;
594 }
595 }
596 if (ftdi->disconnected > 0) {
597 ftdi_elan_put_kref(ftdi);
598 return;
599 } else {
600 ftdi_status_requeue_work(ftdi,
601 msecs_to_jiffies(work_delay_in_msec));
602 return;
603 }
604 }
605
606
607 /*
608 * file_operations for the jtag interface
609 *
610 * the usage count for the device is incremented on open()
611 * and decremented on release()
612 */
613 static int ftdi_elan_open(struct inode *inode, struct file *file)
614 {
615 int subminor;
616 struct usb_interface *interface;
617
618 subminor = iminor(inode);
619 interface = usb_find_interface(&ftdi_elan_driver, subminor);
620
621 if (!interface) {
622 pr_err("can't find device for minor %d\n", subminor);
623 return -ENODEV;
624 } else {
625 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
626 if (!ftdi) {
627 return -ENODEV;
628 } else {
629 if (down_interruptible(&ftdi->sw_lock)) {
630 return -EINTR;
631 } else {
632 ftdi_elan_get_kref(ftdi);
633 file->private_data = ftdi;
634 return 0;
635 }
636 }
637 }
638 }
639
640 static int ftdi_elan_release(struct inode *inode, struct file *file)
641 {
642 struct usb_ftdi *ftdi = file->private_data;
643 if (ftdi == NULL)
644 return -ENODEV;
645 up(&ftdi->sw_lock); /* decrement the count on our device */
646 ftdi_elan_put_kref(ftdi);
647 return 0;
648 }
649
650
651 /*
652 *
653 * blocking bulk reads are used to get data from the device
654 *
655 */
656 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
657 size_t count, loff_t *ppos)
658 {
659 char data[30 *3 + 4];
660 char *d = data;
661 int m = (sizeof(data) - 1) / 3 - 1;
662 int bytes_read = 0;
663 int retry_on_empty = 10;
664 int retry_on_timeout = 5;
665 struct usb_ftdi *ftdi = file->private_data;
666 if (ftdi->disconnected > 0) {
667 return -ENODEV;
668 }
669 data[0] = 0;
670 have:if (ftdi->bulk_in_left > 0) {
671 if (count-- > 0) {
672 char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
673 ftdi->bulk_in_left -= 1;
674 if (bytes_read < m) {
675 d += sprintf(d, " %02X", 0x000000FF & *p);
676 } else if (bytes_read > m) {
677 } else
678 d += sprintf(d, " ..");
679 if (copy_to_user(buffer++, p, 1)) {
680 return -EFAULT;
681 } else {
682 bytes_read += 1;
683 goto have;
684 }
685 } else
686 return bytes_read;
687 }
688 more:if (count > 0) {
689 int packet_bytes = 0;
690 int retval = usb_bulk_msg(ftdi->udev,
691 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
692 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
693 &packet_bytes, 50);
694 if (packet_bytes > 2) {
695 ftdi->bulk_in_left = packet_bytes - 2;
696 ftdi->bulk_in_last = 1;
697 goto have;
698 } else if (retval == -ETIMEDOUT) {
699 if (retry_on_timeout-- > 0) {
700 goto more;
701 } else if (bytes_read > 0) {
702 return bytes_read;
703 } else
704 return retval;
705 } else if (retval == 0) {
706 if (retry_on_empty-- > 0) {
707 goto more;
708 } else
709 return bytes_read;
710 } else
711 return retval;
712 } else
713 return bytes_read;
714 }
715
716 static void ftdi_elan_write_bulk_callback(struct urb *urb)
717 {
718 struct usb_ftdi *ftdi = urb->context;
719 int status = urb->status;
720
721 if (status && !(status == -ENOENT || status == -ECONNRESET ||
722 status == -ESHUTDOWN)) {
723 dev_err(&ftdi->udev->dev,
724 "urb=%p write bulk status received: %d\n", urb, status);
725 }
726 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
727 urb->transfer_buffer, urb->transfer_dma);
728 }
729
730 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
731 char *buf, int command_size, int total_size)
732 {
733 int ed_commands = 0;
734 int b = 0;
735 int I = command_size;
736 int i = ftdi->command_head;
737 while (I-- > 0) {
738 struct u132_command *command = &ftdi->command[COMMAND_MASK &
739 i++];
740 int F = command->follows;
741 u8 *f = command->buffer;
742 if (command->header & 0x80) {
743 ed_commands |= 1 << (0x3 & (command->header >> 5));
744 }
745 buf[b++] = command->header;
746 buf[b++] = (command->length >> 0) & 0x00FF;
747 buf[b++] = (command->length >> 8) & 0x00FF;
748 buf[b++] = command->address;
749 buf[b++] = command->width;
750 while (F-- > 0) {
751 buf[b++] = *f++;
752 }
753 }
754 return ed_commands;
755 }
756
757 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
758 {
759 int total_size = 0;
760 int I = command_size;
761 int i = ftdi->command_head;
762 while (I-- > 0) {
763 struct u132_command *command = &ftdi->command[COMMAND_MASK &
764 i++];
765 total_size += 5 + command->follows;
766 } return total_size;
767 }
768
769 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
770 {
771 int retval;
772 char *buf;
773 int ed_commands;
774 int total_size;
775 struct urb *urb;
776 int command_size = ftdi->command_next - ftdi->command_head;
777 if (command_size == 0)
778 return 0;
779 total_size = ftdi_elan_total_command_size(ftdi, command_size);
780 urb = usb_alloc_urb(0, GFP_KERNEL);
781 if (!urb)
782 return -ENOMEM;
783 buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
784 &urb->transfer_dma);
785 if (!buf) {
786 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d commands totaling %d bytes to the Uxxx\n",
787 command_size, total_size);
788 usb_free_urb(urb);
789 return -ENOMEM;
790 }
791 ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
792 command_size, total_size);
793 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
794 ftdi->bulk_out_endpointAddr), buf, total_size,
795 ftdi_elan_write_bulk_callback, ftdi);
796 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
797 if (ed_commands) {
798 char diag[40 *3 + 4];
799 char *d = diag;
800 int m = total_size;
801 u8 *c = buf;
802 int s = (sizeof(diag) - 1) / 3;
803 diag[0] = 0;
804 while (s-- > 0 && m-- > 0) {
805 if (s > 0 || m == 0) {
806 d += sprintf(d, " %02X", *c++);
807 } else
808 d += sprintf(d, " ..");
809 }
810 }
811 retval = usb_submit_urb(urb, GFP_KERNEL);
812 if (retval) {
813 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write %d commands totaling %d bytes to the Uxxx\n",
814 retval, urb, command_size, total_size);
815 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
816 usb_free_urb(urb);
817 return retval;
818 }
819 usb_free_urb(urb); /* release our reference to this urb,
820 the USB core will eventually free it entirely */
821 ftdi->command_head += command_size;
822 ftdi_elan_kick_respond_queue(ftdi);
823 return 0;
824 }
825
826 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
827 struct u132_target *target, u8 *buffer, int length)
828 {
829 struct urb *urb = target->urb;
830 int halted = target->halted;
831 int skipped = target->skipped;
832 int actual = target->actual;
833 int non_null = target->non_null;
834 int toggle_bits = target->toggle_bits;
835 int error_count = target->error_count;
836 int condition_code = target->condition_code;
837 int repeat_number = target->repeat_number;
838 void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
839 int, int, int, int) = target->callback;
840 target->active -= 1;
841 target->callback = NULL;
842 (*callback) (target->endp, urb, buffer, length, toggle_bits,
843 error_count, condition_code, repeat_number, halted, skipped,
844 actual, non_null);
845 }
846
847 static char *have_ed_set_response(struct usb_ftdi *ftdi,
848 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
849 char *b)
850 {
851 int payload = (ed_length >> 0) & 0x07FF;
852 mutex_lock(&ftdi->u132_lock);
853 target->actual = 0;
854 target->non_null = (ed_length >> 15) & 0x0001;
855 target->repeat_number = (ed_length >> 11) & 0x000F;
856 if (ed_type == 0x02 || ed_type == 0x03) {
857 if (payload == 0 || target->abandoning > 0) {
858 target->abandoning = 0;
859 mutex_unlock(&ftdi->u132_lock);
860 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
861 payload);
862 ftdi->received = 0;
863 ftdi->expected = 4;
864 ftdi->ed_found = 0;
865 return ftdi->response;
866 } else {
867 ftdi->expected = 4 + payload;
868 ftdi->ed_found = 1;
869 mutex_unlock(&ftdi->u132_lock);
870 return b;
871 }
872 } else {
873 target->abandoning = 0;
874 mutex_unlock(&ftdi->u132_lock);
875 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
876 payload);
877 ftdi->received = 0;
878 ftdi->expected = 4;
879 ftdi->ed_found = 0;
880 return ftdi->response;
881 }
882 }
883
884 static char *have_ed_get_response(struct usb_ftdi *ftdi,
885 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
886 char *b)
887 {
888 mutex_lock(&ftdi->u132_lock);
889 target->condition_code = TD_DEVNOTRESP;
890 target->actual = (ed_length >> 0) & 0x01FF;
891 target->non_null = (ed_length >> 15) & 0x0001;
892 target->repeat_number = (ed_length >> 11) & 0x000F;
893 mutex_unlock(&ftdi->u132_lock);
894 if (target->active)
895 ftdi_elan_do_callback(ftdi, target, NULL, 0);
896 target->abandoning = 0;
897 ftdi->received = 0;
898 ftdi->expected = 4;
899 ftdi->ed_found = 0;
900 return ftdi->response;
901 }
902
903
904 /*
905 * The engine tries to empty the FTDI fifo
906 *
907 * all responses found in the fifo data are dispatched thus
908 * the response buffer can only ever hold a maximum sized
909 * response from the Uxxx.
910 *
911 */
912 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
913 {
914 u8 *b = ftdi->response + ftdi->received;
915 int bytes_read = 0;
916 int retry_on_empty = 1;
917 int retry_on_timeout = 3;
918 read:{
919 int packet_bytes = 0;
920 int retval = usb_bulk_msg(ftdi->udev,
921 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
922 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
923 &packet_bytes, 500);
924 char diag[30 *3 + 4];
925 char *d = diag;
926 int m = packet_bytes;
927 u8 *c = ftdi->bulk_in_buffer;
928 int s = (sizeof(diag) - 1) / 3;
929 diag[0] = 0;
930 while (s-- > 0 && m-- > 0) {
931 if (s > 0 || m == 0) {
932 d += sprintf(d, " %02X", *c++);
933 } else
934 d += sprintf(d, " ..");
935 }
936 if (packet_bytes > 2) {
937 ftdi->bulk_in_left = packet_bytes - 2;
938 ftdi->bulk_in_last = 1;
939 goto have;
940 } else if (retval == -ETIMEDOUT) {
941 if (retry_on_timeout-- > 0) {
942 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
943 packet_bytes, bytes_read, diag);
944 goto more;
945 } else if (bytes_read > 0) {
946 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
947 bytes_read, diag);
948 return -ENOMEM;
949 } else {
950 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
951 packet_bytes, bytes_read, diag);
952 return -ENOMEM;
953 }
954 } else if (retval == -EILSEQ) {
955 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
956 retval, packet_bytes, bytes_read, diag);
957 return retval;
958 } else if (retval) {
959 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
960 retval, packet_bytes, bytes_read, diag);
961 return retval;
962 } else {
963 if (retry_on_empty-- > 0) {
964 goto more;
965 } else
966 return 0;
967 }
968 }
969 more:{
970 goto read;
971 }
972 have:if (ftdi->bulk_in_left > 0) {
973 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
974 bytes_read += 1;
975 ftdi->bulk_in_left -= 1;
976 if (ftdi->received == 0 && c == 0xFF) {
977 goto have;
978 } else
979 *b++ = c;
980 if (++ftdi->received < ftdi->expected) {
981 goto have;
982 } else if (ftdi->ed_found) {
983 int ed_number = (ftdi->response[0] >> 5) & 0x03;
984 u16 ed_length = (ftdi->response[2] << 8) |
985 ftdi->response[1];
986 struct u132_target *target = &ftdi->target[ed_number];
987 int payload = (ed_length >> 0) & 0x07FF;
988 char diag[30 *3 + 4];
989 char *d = diag;
990 int m = payload;
991 u8 *c = 4 + ftdi->response;
992 int s = (sizeof(diag) - 1) / 3;
993 diag[0] = 0;
994 while (s-- > 0 && m-- > 0) {
995 if (s > 0 || m == 0) {
996 d += sprintf(d, " %02X", *c++);
997 } else
998 d += sprintf(d, " ..");
999 }
1000 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1001 payload);
1002 ftdi->received = 0;
1003 ftdi->expected = 4;
1004 ftdi->ed_found = 0;
1005 b = ftdi->response;
1006 goto have;
1007 } else if (ftdi->expected == 8) {
1008 u8 buscmd;
1009 int respond_head = ftdi->respond_head++;
1010 struct u132_respond *respond = &ftdi->respond[
1011 RESPOND_MASK & respond_head];
1012 u32 data = ftdi->response[7];
1013 data <<= 8;
1014 data |= ftdi->response[6];
1015 data <<= 8;
1016 data |= ftdi->response[5];
1017 data <<= 8;
1018 data |= ftdi->response[4];
1019 *respond->value = data;
1020 *respond->result = 0;
1021 complete(&respond->wait_completion);
1022 ftdi->received = 0;
1023 ftdi->expected = 4;
1024 ftdi->ed_found = 0;
1025 b = ftdi->response;
1026 buscmd = (ftdi->response[0] >> 0) & 0x0F;
1027 if (buscmd == 0x00) {
1028 } else if (buscmd == 0x02) {
1029 } else if (buscmd == 0x06) {
1030 } else if (buscmd == 0x0A) {
1031 } else
1032 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1033 buscmd, data);
1034 goto have;
1035 } else {
1036 if ((ftdi->response[0] & 0x80) == 0x00) {
1037 ftdi->expected = 8;
1038 goto have;
1039 } else {
1040 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1041 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1042 u16 ed_length = (ftdi->response[2] << 8) |
1043 ftdi->response[1];
1044 struct u132_target *target = &ftdi->target[
1045 ed_number];
1046 target->halted = (ftdi->response[0] >> 3) &
1047 0x01;
1048 target->skipped = (ftdi->response[0] >> 2) &
1049 0x01;
1050 target->toggle_bits = (ftdi->response[3] >> 6)
1051 & 0x03;
1052 target->error_count = (ftdi->response[3] >> 4)
1053 & 0x03;
1054 target->condition_code = (ftdi->response[
1055 3] >> 0) & 0x0F;
1056 if ((ftdi->response[0] & 0x10) == 0x00) {
1057 b = have_ed_set_response(ftdi, target,
1058 ed_length, ed_number, ed_type,
1059 b);
1060 goto have;
1061 } else {
1062 b = have_ed_get_response(ftdi, target,
1063 ed_length, ed_number, ed_type,
1064 b);
1065 goto have;
1066 }
1067 }
1068 }
1069 } else
1070 goto more;
1071 }
1072
1073
1074 /*
1075 * create a urb, and a buffer for it, and copy the data to the urb
1076 *
1077 */
1078 static ssize_t ftdi_elan_write(struct file *file,
1079 const char __user *user_buffer, size_t count,
1080 loff_t *ppos)
1081 {
1082 int retval = 0;
1083 struct urb *urb;
1084 char *buf;
1085 struct usb_ftdi *ftdi = file->private_data;
1086
1087 if (ftdi->disconnected > 0) {
1088 return -ENODEV;
1089 }
1090 if (count == 0) {
1091 goto exit;
1092 }
1093 urb = usb_alloc_urb(0, GFP_KERNEL);
1094 if (!urb) {
1095 retval = -ENOMEM;
1096 goto error_1;
1097 }
1098 buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1099 &urb->transfer_dma);
1100 if (!buf) {
1101 retval = -ENOMEM;
1102 goto error_2;
1103 }
1104 if (copy_from_user(buf, user_buffer, count)) {
1105 retval = -EFAULT;
1106 goto error_3;
1107 }
1108 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1109 ftdi->bulk_out_endpointAddr), buf, count,
1110 ftdi_elan_write_bulk_callback, ftdi);
1111 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1112 retval = usb_submit_urb(urb, GFP_KERNEL);
1113 if (retval) {
1114 dev_err(&ftdi->udev->dev,
1115 "failed submitting write urb, error %d\n", retval);
1116 goto error_3;
1117 }
1118 usb_free_urb(urb);
1119
1120 exit:
1121 return count;
1122 error_3:
1123 usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1124 error_2:
1125 usb_free_urb(urb);
1126 error_1:
1127 return retval;
1128 }
1129
1130 static const struct file_operations ftdi_elan_fops = {
1131 .owner = THIS_MODULE,
1132 .llseek = no_llseek,
1133 .read = ftdi_elan_read,
1134 .write = ftdi_elan_write,
1135 .open = ftdi_elan_open,
1136 .release = ftdi_elan_release,
1137 };
1138
1139 /*
1140 * usb class driver info in order to get a minor number from the usb core,
1141 * and to have the device registered with the driver core
1142 */
1143 static struct usb_class_driver ftdi_elan_jtag_class = {
1144 .name = "ftdi-%d-jtag",
1145 .fops = &ftdi_elan_fops,
1146 .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1147 };
1148
1149 /*
1150 * the following definitions are for the
1151 * ELAN FPGA state machgine processor that
1152 * lies on the other side of the FTDI chip
1153 */
1154 #define cPCIu132rd 0x0
1155 #define cPCIu132wr 0x1
1156 #define cPCIiord 0x2
1157 #define cPCIiowr 0x3
1158 #define cPCImemrd 0x6
1159 #define cPCImemwr 0x7
1160 #define cPCIcfgrd 0xA
1161 #define cPCIcfgwr 0xB
1162 #define cPCInull 0xF
1163 #define cU132cmd_status 0x0
1164 #define cU132flash 0x1
1165 #define cPIDsetup 0x0
1166 #define cPIDout 0x1
1167 #define cPIDin 0x2
1168 #define cPIDinonce 0x3
1169 #define cCCnoerror 0x0
1170 #define cCCcrc 0x1
1171 #define cCCbitstuff 0x2
1172 #define cCCtoggle 0x3
1173 #define cCCstall 0x4
1174 #define cCCnoresp 0x5
1175 #define cCCbadpid1 0x6
1176 #define cCCbadpid2 0x7
1177 #define cCCdataoverrun 0x8
1178 #define cCCdataunderrun 0x9
1179 #define cCCbuffoverrun 0xC
1180 #define cCCbuffunderrun 0xD
1181 #define cCCnotaccessed 0xF
1182 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1183 {
1184 wait:if (ftdi->disconnected > 0) {
1185 return -ENODEV;
1186 } else {
1187 int command_size;
1188 mutex_lock(&ftdi->u132_lock);
1189 command_size = ftdi->command_next - ftdi->command_head;
1190 if (command_size < COMMAND_SIZE) {
1191 struct u132_command *command = &ftdi->command[
1192 COMMAND_MASK & ftdi->command_next];
1193 command->header = 0x00 | cPCIu132wr;
1194 command->length = 0x04;
1195 command->address = 0x00;
1196 command->width = 0x00;
1197 command->follows = 4;
1198 command->value = data;
1199 command->buffer = &command->value;
1200 ftdi->command_next += 1;
1201 ftdi_elan_kick_command_queue(ftdi);
1202 mutex_unlock(&ftdi->u132_lock);
1203 return 0;
1204 } else {
1205 mutex_unlock(&ftdi->u132_lock);
1206 msleep(100);
1207 goto wait;
1208 }
1209 }
1210 }
1211
1212 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1213 u8 width, u32 data)
1214 {
1215 u8 addressofs = config_offset / 4;
1216 wait:if (ftdi->disconnected > 0) {
1217 return -ENODEV;
1218 } else {
1219 int command_size;
1220 mutex_lock(&ftdi->u132_lock);
1221 command_size = ftdi->command_next - ftdi->command_head;
1222 if (command_size < COMMAND_SIZE) {
1223 struct u132_command *command = &ftdi->command[
1224 COMMAND_MASK & ftdi->command_next];
1225 command->header = 0x00 | (cPCIcfgwr & 0x0F);
1226 command->length = 0x04;
1227 command->address = addressofs;
1228 command->width = 0x00 | (width & 0x0F);
1229 command->follows = 4;
1230 command->value = data;
1231 command->buffer = &command->value;
1232 ftdi->command_next += 1;
1233 ftdi_elan_kick_command_queue(ftdi);
1234 mutex_unlock(&ftdi->u132_lock);
1235 return 0;
1236 } else {
1237 mutex_unlock(&ftdi->u132_lock);
1238 msleep(100);
1239 goto wait;
1240 }
1241 }
1242 }
1243
1244 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1245 u8 width, u32 data)
1246 {
1247 u8 addressofs = mem_offset / 4;
1248 wait:if (ftdi->disconnected > 0) {
1249 return -ENODEV;
1250 } else {
1251 int command_size;
1252 mutex_lock(&ftdi->u132_lock);
1253 command_size = ftdi->command_next - ftdi->command_head;
1254 if (command_size < COMMAND_SIZE) {
1255 struct u132_command *command = &ftdi->command[
1256 COMMAND_MASK & ftdi->command_next];
1257 command->header = 0x00 | (cPCImemwr & 0x0F);
1258 command->length = 0x04;
1259 command->address = addressofs;
1260 command->width = 0x00 | (width & 0x0F);
1261 command->follows = 4;
1262 command->value = data;
1263 command->buffer = &command->value;
1264 ftdi->command_next += 1;
1265 ftdi_elan_kick_command_queue(ftdi);
1266 mutex_unlock(&ftdi->u132_lock);
1267 return 0;
1268 } else {
1269 mutex_unlock(&ftdi->u132_lock);
1270 msleep(100);
1271 goto wait;
1272 }
1273 }
1274 }
1275
1276 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1277 u8 width, u32 data)
1278 {
1279 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1280 return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1281 }
1282
1283
1284 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1285 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1286 {
1287 wait:if (ftdi->disconnected > 0) {
1288 return -ENODEV;
1289 } else {
1290 int command_size;
1291 int respond_size;
1292 mutex_lock(&ftdi->u132_lock);
1293 command_size = ftdi->command_next - ftdi->command_head;
1294 respond_size = ftdi->respond_next - ftdi->respond_head;
1295 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1296 {
1297 struct u132_command *command = &ftdi->command[
1298 COMMAND_MASK & ftdi->command_next];
1299 struct u132_respond *respond = &ftdi->respond[
1300 RESPOND_MASK & ftdi->respond_next];
1301 int result = -ENODEV;
1302 respond->result = &result;
1303 respond->header = command->header = 0x00 | cPCIu132rd;
1304 command->length = 0x04;
1305 respond->address = command->address = cU132cmd_status;
1306 command->width = 0x00;
1307 command->follows = 0;
1308 command->value = 0;
1309 command->buffer = NULL;
1310 respond->value = data;
1311 init_completion(&respond->wait_completion);
1312 ftdi->command_next += 1;
1313 ftdi->respond_next += 1;
1314 ftdi_elan_kick_command_queue(ftdi);
1315 mutex_unlock(&ftdi->u132_lock);
1316 wait_for_completion(&respond->wait_completion);
1317 return result;
1318 } else {
1319 mutex_unlock(&ftdi->u132_lock);
1320 msleep(100);
1321 goto wait;
1322 }
1323 }
1324 }
1325
1326 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1327 u8 width, u32 *data)
1328 {
1329 u8 addressofs = config_offset / 4;
1330 wait:if (ftdi->disconnected > 0) {
1331 return -ENODEV;
1332 } else {
1333 int command_size;
1334 int respond_size;
1335 mutex_lock(&ftdi->u132_lock);
1336 command_size = ftdi->command_next - ftdi->command_head;
1337 respond_size = ftdi->respond_next - ftdi->respond_head;
1338 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1339 {
1340 struct u132_command *command = &ftdi->command[
1341 COMMAND_MASK & ftdi->command_next];
1342 struct u132_respond *respond = &ftdi->respond[
1343 RESPOND_MASK & ftdi->respond_next];
1344 int result = -ENODEV;
1345 respond->result = &result;
1346 respond->header = command->header = 0x00 | (cPCIcfgrd &
1347 0x0F);
1348 command->length = 0x04;
1349 respond->address = command->address = addressofs;
1350 command->width = 0x00 | (width & 0x0F);
1351 command->follows = 0;
1352 command->value = 0;
1353 command->buffer = NULL;
1354 respond->value = data;
1355 init_completion(&respond->wait_completion);
1356 ftdi->command_next += 1;
1357 ftdi->respond_next += 1;
1358 ftdi_elan_kick_command_queue(ftdi);
1359 mutex_unlock(&ftdi->u132_lock);
1360 wait_for_completion(&respond->wait_completion);
1361 return result;
1362 } else {
1363 mutex_unlock(&ftdi->u132_lock);
1364 msleep(100);
1365 goto wait;
1366 }
1367 }
1368 }
1369
1370 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1371 u8 width, u32 *data)
1372 {
1373 u8 addressofs = mem_offset / 4;
1374 wait:if (ftdi->disconnected > 0) {
1375 return -ENODEV;
1376 } else {
1377 int command_size;
1378 int respond_size;
1379 mutex_lock(&ftdi->u132_lock);
1380 command_size = ftdi->command_next - ftdi->command_head;
1381 respond_size = ftdi->respond_next - ftdi->respond_head;
1382 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1383 {
1384 struct u132_command *command = &ftdi->command[
1385 COMMAND_MASK & ftdi->command_next];
1386 struct u132_respond *respond = &ftdi->respond[
1387 RESPOND_MASK & ftdi->respond_next];
1388 int result = -ENODEV;
1389 respond->result = &result;
1390 respond->header = command->header = 0x00 | (cPCImemrd &
1391 0x0F);
1392 command->length = 0x04;
1393 respond->address = command->address = addressofs;
1394 command->width = 0x00 | (width & 0x0F);
1395 command->follows = 0;
1396 command->value = 0;
1397 command->buffer = NULL;
1398 respond->value = data;
1399 init_completion(&respond->wait_completion);
1400 ftdi->command_next += 1;
1401 ftdi->respond_next += 1;
1402 ftdi_elan_kick_command_queue(ftdi);
1403 mutex_unlock(&ftdi->u132_lock);
1404 wait_for_completion(&respond->wait_completion);
1405 return result;
1406 } else {
1407 mutex_unlock(&ftdi->u132_lock);
1408 msleep(100);
1409 goto wait;
1410 }
1411 }
1412 }
1413
1414 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1415 u8 width, u32 *data)
1416 {
1417 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1418 if (ftdi->initialized == 0) {
1419 return -ENODEV;
1420 } else
1421 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1422 }
1423
1424
1425 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1426 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1427 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1428 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1429 int toggle_bits, int error_count, int condition_code, int repeat_number,
1430 int halted, int skipped, int actual, int non_null))
1431 {
1432 u8 ed = ed_number - 1;
1433 wait:if (ftdi->disconnected > 0) {
1434 return -ENODEV;
1435 } else if (ftdi->initialized == 0) {
1436 return -ENODEV;
1437 } else {
1438 int command_size;
1439 mutex_lock(&ftdi->u132_lock);
1440 command_size = ftdi->command_next - ftdi->command_head;
1441 if (command_size < COMMAND_SIZE) {
1442 struct u132_target *target = &ftdi->target[ed];
1443 struct u132_command *command = &ftdi->command[
1444 COMMAND_MASK & ftdi->command_next];
1445 command->header = 0x80 | (ed << 5);
1446 command->length = 0x8007;
1447 command->address = (toggle_bits << 6) | (ep_number << 2)
1448 | (address << 0);
1449 command->width = usb_maxpacket(urb->dev, urb->pipe,
1450 usb_pipeout(urb->pipe));
1451 command->follows = 8;
1452 command->value = 0;
1453 command->buffer = urb->setup_packet;
1454 target->callback = callback;
1455 target->endp = endp;
1456 target->urb = urb;
1457 target->active = 1;
1458 ftdi->command_next += 1;
1459 ftdi_elan_kick_command_queue(ftdi);
1460 mutex_unlock(&ftdi->u132_lock);
1461 return 0;
1462 } else {
1463 mutex_unlock(&ftdi->u132_lock);
1464 msleep(100);
1465 goto wait;
1466 }
1467 }
1468 }
1469
1470 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1471 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1472 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1473 int toggle_bits, int error_count, int condition_code, int repeat_number,
1474 int halted, int skipped, int actual, int non_null))
1475 {
1476 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1477 return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1478 ep_number, toggle_bits, callback);
1479 }
1480
1481
1482 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1483 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1484 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1485 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1486 int toggle_bits, int error_count, int condition_code, int repeat_number,
1487 int halted, int skipped, int actual, int non_null))
1488 {
1489 u8 ed = ed_number - 1;
1490 wait:if (ftdi->disconnected > 0) {
1491 return -ENODEV;
1492 } else if (ftdi->initialized == 0) {
1493 return -ENODEV;
1494 } else {
1495 int command_size;
1496 mutex_lock(&ftdi->u132_lock);
1497 command_size = ftdi->command_next - ftdi->command_head;
1498 if (command_size < COMMAND_SIZE) {
1499 struct u132_target *target = &ftdi->target[ed];
1500 struct u132_command *command = &ftdi->command[
1501 COMMAND_MASK & ftdi->command_next];
1502 u32 remaining_length = urb->transfer_buffer_length -
1503 urb->actual_length;
1504 command->header = 0x82 | (ed << 5);
1505 if (remaining_length == 0) {
1506 command->length = 0x0000;
1507 } else if (remaining_length > 1024) {
1508 command->length = 0x8000 | 1023;
1509 } else
1510 command->length = 0x8000 | (remaining_length -
1511 1);
1512 command->address = (toggle_bits << 6) | (ep_number << 2)
1513 | (address << 0);
1514 command->width = usb_maxpacket(urb->dev, urb->pipe,
1515 usb_pipeout(urb->pipe));
1516 command->follows = 0;
1517 command->value = 0;
1518 command->buffer = NULL;
1519 target->callback = callback;
1520 target->endp = endp;
1521 target->urb = urb;
1522 target->active = 1;
1523 ftdi->command_next += 1;
1524 ftdi_elan_kick_command_queue(ftdi);
1525 mutex_unlock(&ftdi->u132_lock);
1526 return 0;
1527 } else {
1528 mutex_unlock(&ftdi->u132_lock);
1529 msleep(100);
1530 goto wait;
1531 }
1532 }
1533 }
1534
1535 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1536 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1537 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1538 int toggle_bits, int error_count, int condition_code, int repeat_number,
1539 int halted, int skipped, int actual, int non_null))
1540 {
1541 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1542 return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1543 ep_number, toggle_bits, callback);
1544 }
1545
1546
1547 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1548 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1549 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1550 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1551 int toggle_bits, int error_count, int condition_code, int repeat_number,
1552 int halted, int skipped, int actual, int non_null))
1553 {
1554 u8 ed = ed_number - 1;
1555 wait:if (ftdi->disconnected > 0) {
1556 return -ENODEV;
1557 } else if (ftdi->initialized == 0) {
1558 return -ENODEV;
1559 } else {
1560 int command_size;
1561 mutex_lock(&ftdi->u132_lock);
1562 command_size = ftdi->command_next - ftdi->command_head;
1563 if (command_size < COMMAND_SIZE) {
1564 struct u132_target *target = &ftdi->target[ed];
1565 struct u132_command *command = &ftdi->command[
1566 COMMAND_MASK & ftdi->command_next];
1567 command->header = 0x81 | (ed << 5);
1568 command->length = 0x0000;
1569 command->address = (toggle_bits << 6) | (ep_number << 2)
1570 | (address << 0);
1571 command->width = usb_maxpacket(urb->dev, urb->pipe,
1572 usb_pipeout(urb->pipe));
1573 command->follows = 0;
1574 command->value = 0;
1575 command->buffer = NULL;
1576 target->callback = callback;
1577 target->endp = endp;
1578 target->urb = urb;
1579 target->active = 1;
1580 ftdi->command_next += 1;
1581 ftdi_elan_kick_command_queue(ftdi);
1582 mutex_unlock(&ftdi->u132_lock);
1583 return 0;
1584 } else {
1585 mutex_unlock(&ftdi->u132_lock);
1586 msleep(100);
1587 goto wait;
1588 }
1589 }
1590 }
1591
1592 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1593 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1594 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1595 int toggle_bits, int error_count, int condition_code, int repeat_number,
1596 int halted, int skipped, int actual, int non_null))
1597 {
1598 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1599 return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1600 ep_number, toggle_bits, callback);
1601 }
1602
1603
1604 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1605 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1606 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1607 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1608 int toggle_bits, int error_count, int condition_code, int repeat_number,
1609 int halted, int skipped, int actual, int non_null))
1610 {
1611 u8 ed = ed_number - 1;
1612 wait:if (ftdi->disconnected > 0) {
1613 return -ENODEV;
1614 } else if (ftdi->initialized == 0) {
1615 return -ENODEV;
1616 } else {
1617 int command_size;
1618 mutex_lock(&ftdi->u132_lock);
1619 command_size = ftdi->command_next - ftdi->command_head;
1620 if (command_size < COMMAND_SIZE) {
1621 u8 *b;
1622 u16 urb_size;
1623 int i = 0;
1624 char data[30 *3 + 4];
1625 char *d = data;
1626 int m = (sizeof(data) - 1) / 3 - 1;
1627 int l = 0;
1628 struct u132_target *target = &ftdi->target[ed];
1629 struct u132_command *command = &ftdi->command[
1630 COMMAND_MASK & ftdi->command_next];
1631 command->header = 0x81 | (ed << 5);
1632 command->address = (toggle_bits << 6) | (ep_number << 2)
1633 | (address << 0);
1634 command->width = usb_maxpacket(urb->dev, urb->pipe,
1635 usb_pipeout(urb->pipe));
1636 command->follows = min_t(u32, 1024,
1637 urb->transfer_buffer_length -
1638 urb->actual_length);
1639 command->value = 0;
1640 command->buffer = urb->transfer_buffer +
1641 urb->actual_length;
1642 command->length = 0x8000 | (command->follows - 1);
1643 b = command->buffer;
1644 urb_size = command->follows;
1645 data[0] = 0;
1646 while (urb_size-- > 0) {
1647 if (i > m) {
1648 } else if (i++ < m) {
1649 int w = sprintf(d, " %02X", *b++);
1650 d += w;
1651 l += w;
1652 } else
1653 d += sprintf(d, " ..");
1654 }
1655 target->callback = callback;
1656 target->endp = endp;
1657 target->urb = urb;
1658 target->active = 1;
1659 ftdi->command_next += 1;
1660 ftdi_elan_kick_command_queue(ftdi);
1661 mutex_unlock(&ftdi->u132_lock);
1662 return 0;
1663 } else {
1664 mutex_unlock(&ftdi->u132_lock);
1665 msleep(100);
1666 goto wait;
1667 }
1668 }
1669 }
1670
1671 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1672 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1673 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1674 int toggle_bits, int error_count, int condition_code, int repeat_number,
1675 int halted, int skipped, int actual, int non_null))
1676 {
1677 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1678 return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1679 ep_number, toggle_bits, callback);
1680 }
1681
1682
1683 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1684 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1685 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1686 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1687 int toggle_bits, int error_count, int condition_code, int repeat_number,
1688 int halted, int skipped, int actual, int non_null))
1689 {
1690 u8 ed = ed_number - 1;
1691 wait:if (ftdi->disconnected > 0) {
1692 return -ENODEV;
1693 } else if (ftdi->initialized == 0) {
1694 return -ENODEV;
1695 } else {
1696 int command_size;
1697 mutex_lock(&ftdi->u132_lock);
1698 command_size = ftdi->command_next - ftdi->command_head;
1699 if (command_size < COMMAND_SIZE) {
1700 u32 remaining_length = urb->transfer_buffer_length -
1701 urb->actual_length;
1702 struct u132_target *target = &ftdi->target[ed];
1703 struct u132_command *command = &ftdi->command[
1704 COMMAND_MASK & ftdi->command_next];
1705 command->header = 0x83 | (ed << 5);
1706 if (remaining_length == 0) {
1707 command->length = 0x0000;
1708 } else if (remaining_length > 1024) {
1709 command->length = 0x8000 | 1023;
1710 } else
1711 command->length = 0x8000 | (remaining_length -
1712 1);
1713 command->address = (toggle_bits << 6) | (ep_number << 2)
1714 | (address << 0);
1715 command->width = usb_maxpacket(urb->dev, urb->pipe,
1716 usb_pipeout(urb->pipe));
1717 command->follows = 0;
1718 command->value = 0;
1719 command->buffer = NULL;
1720 target->callback = callback;
1721 target->endp = endp;
1722 target->urb = urb;
1723 target->active = 1;
1724 ftdi->command_next += 1;
1725 ftdi_elan_kick_command_queue(ftdi);
1726 mutex_unlock(&ftdi->u132_lock);
1727 return 0;
1728 } else {
1729 mutex_unlock(&ftdi->u132_lock);
1730 msleep(100);
1731 goto wait;
1732 }
1733 }
1734 }
1735
1736 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1737 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1738 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1739 int toggle_bits, int error_count, int condition_code, int repeat_number,
1740 int halted, int skipped, int actual, int non_null))
1741 {
1742 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1743 return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1744 ep_number, toggle_bits, callback);
1745 }
1746
1747
1748 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1749 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1750 void *endp)
1751 {
1752 u8 ed = ed_number - 1;
1753 if (ftdi->disconnected > 0) {
1754 return -ENODEV;
1755 } else if (ftdi->initialized == 0) {
1756 return -ENODEV;
1757 } else {
1758 struct u132_target *target = &ftdi->target[ed];
1759 mutex_lock(&ftdi->u132_lock);
1760 if (target->abandoning > 0) {
1761 mutex_unlock(&ftdi->u132_lock);
1762 return 0;
1763 } else {
1764 target->abandoning = 1;
1765 wait_1:if (target->active == 1) {
1766 int command_size = ftdi->command_next -
1767 ftdi->command_head;
1768 if (command_size < COMMAND_SIZE) {
1769 struct u132_command *command =
1770 &ftdi->command[COMMAND_MASK &
1771 ftdi->command_next];
1772 command->header = 0x80 | (ed << 5) |
1773 0x4;
1774 command->length = 0x00;
1775 command->address = 0x00;
1776 command->width = 0x00;
1777 command->follows = 0;
1778 command->value = 0;
1779 command->buffer = &command->value;
1780 ftdi->command_next += 1;
1781 ftdi_elan_kick_command_queue(ftdi);
1782 } else {
1783 mutex_unlock(&ftdi->u132_lock);
1784 msleep(100);
1785 mutex_lock(&ftdi->u132_lock);
1786 goto wait_1;
1787 }
1788 }
1789 mutex_unlock(&ftdi->u132_lock);
1790 return 0;
1791 }
1792 }
1793 }
1794
1795 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1796 void *endp)
1797 {
1798 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1799 return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1800 }
1801
1802
1803 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1804 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1805 {
1806 int retry_on_empty = 10;
1807 int retry_on_timeout = 5;
1808 int retry_on_status = 20;
1809 more:{
1810 int packet_bytes = 0;
1811 int retval = usb_bulk_msg(ftdi->udev,
1812 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1813 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1814 &packet_bytes, 100);
1815 if (packet_bytes > 2) {
1816 char diag[30 *3 + 4];
1817 char *d = diag;
1818 int m = (sizeof(diag) - 1) / 3 - 1;
1819 char *b = ftdi->bulk_in_buffer;
1820 int bytes_read = 0;
1821 diag[0] = 0;
1822 while (packet_bytes-- > 0) {
1823 char c = *b++;
1824 if (bytes_read < m) {
1825 d += sprintf(d, " %02X",
1826 0x000000FF & c);
1827 } else if (bytes_read > m) {
1828 } else
1829 d += sprintf(d, " ..");
1830 bytes_read += 1;
1831 continue;
1832 }
1833 goto more;
1834 } else if (packet_bytes > 1) {
1835 char s1 = ftdi->bulk_in_buffer[0];
1836 char s2 = ftdi->bulk_in_buffer[1];
1837 if (s1 == 0x31 && s2 == 0x60) {
1838 return 0;
1839 } else if (retry_on_status-- > 0) {
1840 goto more;
1841 } else {
1842 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1843 return -EFAULT;
1844 }
1845 } else if (packet_bytes > 0) {
1846 char b1 = ftdi->bulk_in_buffer[0];
1847 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1848 b1);
1849 if (retry_on_status-- > 0) {
1850 goto more;
1851 } else {
1852 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1853 return -EFAULT;
1854 }
1855 } else if (retval == -ETIMEDOUT) {
1856 if (retry_on_timeout-- > 0) {
1857 goto more;
1858 } else {
1859 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1860 return -ENOMEM;
1861 }
1862 } else if (retval == 0) {
1863 if (retry_on_empty-- > 0) {
1864 goto more;
1865 } else {
1866 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1867 return -ENOMEM;
1868 }
1869 } else {
1870 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1871 return retval;
1872 }
1873 }
1874 return -1;
1875 }
1876
1877
1878 /*
1879 * send the long flush sequence
1880 *
1881 */
1882 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1883 {
1884 int retval;
1885 struct urb *urb;
1886 char *buf;
1887 int I = 257;
1888 int i = 0;
1889 urb = usb_alloc_urb(0, GFP_KERNEL);
1890 if (!urb)
1891 return -ENOMEM;
1892 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1893 if (!buf) {
1894 dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1895 usb_free_urb(urb);
1896 return -ENOMEM;
1897 }
1898 while (I-- > 0)
1899 buf[i++] = 0x55;
1900 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1901 ftdi->bulk_out_endpointAddr), buf, i,
1902 ftdi_elan_write_bulk_callback, ftdi);
1903 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1904 retval = usb_submit_urb(urb, GFP_KERNEL);
1905 if (retval) {
1906 dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1907 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1908 usb_free_urb(urb);
1909 return -ENOMEM;
1910 }
1911 usb_free_urb(urb);
1912 return 0;
1913 }
1914
1915
1916 /*
1917 * send the reset sequence
1918 *
1919 */
1920 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1921 {
1922 int retval;
1923 struct urb *urb;
1924 char *buf;
1925 int I = 4;
1926 int i = 0;
1927 urb = usb_alloc_urb(0, GFP_KERNEL);
1928 if (!urb)
1929 return -ENOMEM;
1930 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1931 if (!buf) {
1932 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1933 usb_free_urb(urb);
1934 return -ENOMEM;
1935 }
1936 buf[i++] = 0x55;
1937 buf[i++] = 0xAA;
1938 buf[i++] = 0x5A;
1939 buf[i++] = 0xA5;
1940 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1941 ftdi->bulk_out_endpointAddr), buf, i,
1942 ftdi_elan_write_bulk_callback, ftdi);
1943 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1944 retval = usb_submit_urb(urb, GFP_KERNEL);
1945 if (retval) {
1946 dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
1947 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1948 usb_free_urb(urb);
1949 return -ENOMEM;
1950 }
1951 usb_free_urb(urb);
1952 return 0;
1953 }
1954
1955 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
1956 {
1957 int retval;
1958 int long_stop = 10;
1959 int retry_on_timeout = 5;
1960 int retry_on_empty = 10;
1961 int err_count = 0;
1962 retval = ftdi_elan_flush_input_fifo(ftdi);
1963 if (retval)
1964 return retval;
1965 ftdi->bulk_in_left = 0;
1966 ftdi->bulk_in_last = -1;
1967 while (long_stop-- > 0) {
1968 int read_stop;
1969 int read_stuck;
1970 retval = ftdi_elan_synchronize_flush(ftdi);
1971 if (retval)
1972 return retval;
1973 retval = ftdi_elan_flush_input_fifo(ftdi);
1974 if (retval)
1975 return retval;
1976 reset:retval = ftdi_elan_synchronize_reset(ftdi);
1977 if (retval)
1978 return retval;
1979 read_stop = 100;
1980 read_stuck = 10;
1981 read:{
1982 int packet_bytes = 0;
1983 retval = usb_bulk_msg(ftdi->udev,
1984 usb_rcvbulkpipe(ftdi->udev,
1985 ftdi->bulk_in_endpointAddr),
1986 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1987 &packet_bytes, 500);
1988 if (packet_bytes > 2) {
1989 char diag[30 *3 + 4];
1990 char *d = diag;
1991 int m = (sizeof(diag) - 1) / 3 - 1;
1992 char *b = ftdi->bulk_in_buffer;
1993 int bytes_read = 0;
1994 unsigned char c = 0;
1995 diag[0] = 0;
1996 while (packet_bytes-- > 0) {
1997 c = *b++;
1998 if (bytes_read < m) {
1999 d += sprintf(d, " %02X", c);
2000 } else if (bytes_read > m) {
2001 } else
2002 d += sprintf(d, " ..");
2003 bytes_read += 1;
2004 continue;
2005 }
2006 if (c == 0x7E) {
2007 return 0;
2008 } else {
2009 if (c == 0x55) {
2010 goto read;
2011 } else if (read_stop-- > 0) {
2012 goto read;
2013 } else {
2014 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2015 continue;
2016 }
2017 }
2018 } else if (packet_bytes > 1) {
2019 unsigned char s1 = ftdi->bulk_in_buffer[0];
2020 unsigned char s2 = ftdi->bulk_in_buffer[1];
2021 if (s1 == 0x31 && s2 == 0x00) {
2022 if (read_stuck-- > 0) {
2023 goto read;
2024 } else
2025 goto reset;
2026 } else if (s1 == 0x31 && s2 == 0x60) {
2027 if (read_stop-- > 0) {
2028 goto read;
2029 } else {
2030 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2031 continue;
2032 }
2033 } else {
2034 if (read_stop-- > 0) {
2035 goto read;
2036 } else {
2037 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2038 continue;
2039 }
2040 }
2041 } else if (packet_bytes > 0) {
2042 if (read_stop-- > 0) {
2043 goto read;
2044 } else {
2045 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2046 continue;
2047 }
2048 } else if (retval == -ETIMEDOUT) {
2049 if (retry_on_timeout-- > 0) {
2050 goto read;
2051 } else {
2052 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2053 continue;
2054 }
2055 } else if (retval == 0) {
2056 if (retry_on_empty-- > 0) {
2057 goto read;
2058 } else {
2059 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2060 continue;
2061 }
2062 } else {
2063 err_count += 1;
2064 dev_err(&ftdi->udev->dev, "error = %d\n",
2065 retval);
2066 if (read_stop-- > 0) {
2067 goto read;
2068 } else {
2069 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2070 continue;
2071 }
2072 }
2073 }
2074 }
2075 dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2076 return -EFAULT;
2077 }
2078
2079 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2080 {
2081 int retry_on_empty = 10;
2082 int retry_on_timeout = 5;
2083 int retry_on_status = 50;
2084 more:{
2085 int packet_bytes = 0;
2086 int retval = usb_bulk_msg(ftdi->udev,
2087 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2088 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2089 &packet_bytes, 1000);
2090 if (packet_bytes > 2) {
2091 char diag[30 *3 + 4];
2092 char *d = diag;
2093 int m = (sizeof(diag) - 1) / 3 - 1;
2094 char *b = ftdi->bulk_in_buffer;
2095 int bytes_read = 0;
2096 diag[0] = 0;
2097 while (packet_bytes-- > 0) {
2098 char c = *b++;
2099 if (bytes_read < m) {
2100 d += sprintf(d, " %02X",
2101 0x000000FF & c);
2102 } else if (bytes_read > m) {
2103 } else
2104 d += sprintf(d, " ..");
2105 bytes_read += 1;
2106 continue;
2107 }
2108 goto more;
2109 } else if (packet_bytes > 1) {
2110 char s1 = ftdi->bulk_in_buffer[0];
2111 char s2 = ftdi->bulk_in_buffer[1];
2112 if (s1 == 0x31 && s2 == 0x60) {
2113 return 0;
2114 } else if (retry_on_status-- > 0) {
2115 msleep(5);
2116 goto more;
2117 } else
2118 return -EFAULT;
2119 } else if (packet_bytes > 0) {
2120 char b1 = ftdi->bulk_in_buffer[0];
2121 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2122 if (retry_on_status-- > 0) {
2123 msleep(5);
2124 goto more;
2125 } else {
2126 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2127 return -EFAULT;
2128 }
2129 } else if (retval == -ETIMEDOUT) {
2130 if (retry_on_timeout-- > 0) {
2131 goto more;
2132 } else {
2133 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2134 return -ENOMEM;
2135 }
2136 } else if (retval == 0) {
2137 if (retry_on_empty-- > 0) {
2138 goto more;
2139 } else {
2140 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2141 return -ENOMEM;
2142 }
2143 } else {
2144 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2145 return -ENOMEM;
2146 }
2147 }
2148 return -1;
2149 }
2150
2151 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2152 {
2153 int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2154 if (UxxxStatus)
2155 return UxxxStatus;
2156 if (ftdi->controlreg & 0x00400000) {
2157 if (ftdi->card_ejected) {
2158 } else {
2159 ftdi->card_ejected = 1;
2160 dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2161 ftdi->controlreg);
2162 }
2163 return -ENODEV;
2164 } else {
2165 u8 fn = ftdi->function - 1;
2166 int activePCIfn = fn << 8;
2167 u32 pcidata;
2168 u32 pciVID;
2169 u32 pciPID;
2170 int reg = 0;
2171 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2172 &pcidata);
2173 if (UxxxStatus)
2174 return UxxxStatus;
2175 pciVID = pcidata & 0xFFFF;
2176 pciPID = (pcidata >> 16) & 0xFFFF;
2177 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2178 ftdi->platform_data.device) {
2179 return 0;
2180 } else {
2181 dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2182 ftdi->platform_data.vendor, pciVID,
2183 ftdi->platform_data.device, pciPID);
2184 return -ENODEV;
2185 }
2186 }
2187 }
2188
2189
2190 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2191 offsetof(struct ohci_regs, member), 0, data);
2192 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2193 offsetof(struct ohci_regs, member), 0, data);
2194
2195 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2196 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2197 OHCI_INTR_WDH)
2198 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2199 {
2200 int devices = 0;
2201 int retval;
2202 u32 hc_control;
2203 int num_ports;
2204 u32 control;
2205 u32 rh_a = -1;
2206 u32 status;
2207 u32 fminterval;
2208 u32 hc_fminterval;
2209 u32 periodicstart;
2210 u32 cmdstatus;
2211 u32 roothub_a;
2212 int mask = OHCI_INTR_INIT;
2213 int sleep_time = 0;
2214 int reset_timeout = 30; /* ... allow extra time */
2215 int temp;
2216 retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2217 if (retval)
2218 return retval;
2219 retval = ftdi_read_pcimem(ftdi, control, &control);
2220 if (retval)
2221 return retval;
2222 retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2223 if (retval)
2224 return retval;
2225 num_ports = rh_a & RH_A_NDP;
2226 retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2227 if (retval)
2228 return retval;
2229 hc_fminterval &= 0x3fff;
2230 if (hc_fminterval != FI) {
2231 }
2232 hc_fminterval |= FSMP(hc_fminterval) << 16;
2233 retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2234 if (retval)
2235 return retval;
2236 switch (hc_control & OHCI_CTRL_HCFS) {
2237 case OHCI_USB_OPER:
2238 sleep_time = 0;
2239 break;
2240 case OHCI_USB_SUSPEND:
2241 case OHCI_USB_RESUME:
2242 hc_control &= OHCI_CTRL_RWC;
2243 hc_control |= OHCI_USB_RESUME;
2244 sleep_time = 10;
2245 break;
2246 default:
2247 hc_control &= OHCI_CTRL_RWC;
2248 hc_control |= OHCI_USB_RESET;
2249 sleep_time = 50;
2250 break;
2251 }
2252 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2253 if (retval)
2254 return retval;
2255 retval = ftdi_read_pcimem(ftdi, control, &control);
2256 if (retval)
2257 return retval;
2258 msleep(sleep_time);
2259 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2260 if (retval)
2261 return retval;
2262 if (!(roothub_a & RH_A_NPS)) { /* power down each port */
2263 for (temp = 0; temp < num_ports; temp++) {
2264 retval = ftdi_write_pcimem(ftdi,
2265 roothub.portstatus[temp], RH_PS_LSDA);
2266 if (retval)
2267 return retval;
2268 }
2269 }
2270 retval = ftdi_read_pcimem(ftdi, control, &control);
2271 if (retval)
2272 return retval;
2273 retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2274 if (retval)
2275 return retval;
2276 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2277 if (retval)
2278 return retval;
2279 extra:{
2280 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2281 if (retval)
2282 return retval;
2283 if (0 != (status & OHCI_HCR)) {
2284 if (--reset_timeout == 0) {
2285 dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2286 return -ENODEV;
2287 } else {
2288 msleep(5);
2289 goto extra;
2290 }
2291 }
2292 }
2293 if (quirk & OHCI_QUIRK_INITRESET) {
2294 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2295 if (retval)
2296 return retval;
2297 retval = ftdi_read_pcimem(ftdi, control, &control);
2298 if (retval)
2299 return retval;
2300 }
2301 retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2302 if (retval)
2303 return retval;
2304 retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2305 if (retval)
2306 return retval;
2307 retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2308 if (retval)
2309 return retval;
2310 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2311 if (retval)
2312 return retval;
2313 retval = ftdi_write_pcimem(ftdi, fminterval,
2314 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2315 if (retval)
2316 return retval;
2317 retval = ftdi_write_pcimem(ftdi, periodicstart,
2318 ((9 *hc_fminterval) / 10) & 0x3fff);
2319 if (retval)
2320 return retval;
2321 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2322 if (retval)
2323 return retval;
2324 retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2325 if (retval)
2326 return retval;
2327 if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2328 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2329 quirk |= OHCI_QUIRK_INITRESET;
2330 goto retry;
2331 } else
2332 dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2333 fminterval, periodicstart);
2334 } /* start controller operations */
2335 hc_control &= OHCI_CTRL_RWC;
2336 hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2337 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2338 if (retval)
2339 return retval;
2340 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2341 if (retval)
2342 return retval;
2343 retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2344 if (retval)
2345 return retval;
2346 retval = ftdi_read_pcimem(ftdi, control, &control);
2347 if (retval)
2348 return retval;
2349 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2350 if (retval)
2351 return retval;
2352 retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2353 if (retval)
2354 return retval;
2355 retval = ftdi_write_pcimem(ftdi, intrdisable,
2356 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2357 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2358 OHCI_INTR_SO);
2359 if (retval)
2360 return retval; /* handle root hub init quirks ... */
2361 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2362 if (retval)
2363 return retval;
2364 roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2365 if (quirk & OHCI_QUIRK_SUPERIO) {
2366 roothub_a |= RH_A_NOCP;
2367 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2368 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2369 if (retval)
2370 return retval;
2371 } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2372 roothub_a |= RH_A_NPS;
2373 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2374 if (retval)
2375 return retval;
2376 }
2377 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2378 if (retval)
2379 return retval;
2380 retval = ftdi_write_pcimem(ftdi, roothub.b,
2381 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2382 if (retval)
2383 return retval;
2384 retval = ftdi_read_pcimem(ftdi, control, &control);
2385 if (retval)
2386 return retval;
2387 mdelay((roothub_a >> 23) & 0x1fe);
2388 for (temp = 0; temp < num_ports; temp++) {
2389 u32 portstatus;
2390 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2391 &portstatus);
2392 if (retval)
2393 return retval;
2394 if (1 & portstatus)
2395 devices += 1;
2396 }
2397 return devices;
2398 }
2399
2400 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2401 {
2402 u32 latence_timer;
2403 int UxxxStatus;
2404 u32 pcidata;
2405 int reg = 0;
2406 int activePCIfn = fn << 8;
2407 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2408 if (UxxxStatus)
2409 return UxxxStatus;
2410 reg = 16;
2411 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2412 0xFFFFFFFF);
2413 if (UxxxStatus)
2414 return UxxxStatus;
2415 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2416 &pcidata);
2417 if (UxxxStatus)
2418 return UxxxStatus;
2419 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2420 0xF0000000);
2421 if (UxxxStatus)
2422 return UxxxStatus;
2423 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2424 &pcidata);
2425 if (UxxxStatus)
2426 return UxxxStatus;
2427 reg = 12;
2428 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2429 &latence_timer);
2430 if (UxxxStatus)
2431 return UxxxStatus;
2432 latence_timer &= 0xFFFF00FF;
2433 latence_timer |= 0x00001600;
2434 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2435 latence_timer);
2436 if (UxxxStatus)
2437 return UxxxStatus;
2438 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2439 &pcidata);
2440 if (UxxxStatus)
2441 return UxxxStatus;
2442 reg = 4;
2443 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2444 0x06);
2445 if (UxxxStatus)
2446 return UxxxStatus;
2447 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2448 &pcidata);
2449 if (UxxxStatus)
2450 return UxxxStatus;
2451 for (reg = 0; reg <= 0x54; reg += 4) {
2452 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2453 if (UxxxStatus)
2454 return UxxxStatus;
2455 }
2456 return 0;
2457 }
2458
2459 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2460 {
2461 u32 latence_timer;
2462 int UxxxStatus;
2463 u32 pcidata;
2464 int reg = 0;
2465 int activePCIfn = fn << 8;
2466 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2467 if (UxxxStatus)
2468 return UxxxStatus;
2469 reg = 16;
2470 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2471 0xFFFFFFFF);
2472 if (UxxxStatus)
2473 return UxxxStatus;
2474 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2475 &pcidata);
2476 if (UxxxStatus)
2477 return UxxxStatus;
2478 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2479 0x00000000);
2480 if (UxxxStatus)
2481 return UxxxStatus;
2482 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2483 &pcidata);
2484 if (UxxxStatus)
2485 return UxxxStatus;
2486 reg = 12;
2487 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2488 &latence_timer);
2489 if (UxxxStatus)
2490 return UxxxStatus;
2491 latence_timer &= 0xFFFF00FF;
2492 latence_timer |= 0x00001600;
2493 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2494 latence_timer);
2495 if (UxxxStatus)
2496 return UxxxStatus;
2497 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2498 &pcidata);
2499 if (UxxxStatus)
2500 return UxxxStatus;
2501 reg = 4;
2502 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2503 0x00);
2504 if (UxxxStatus)
2505 return UxxxStatus;
2506 return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2507 }
2508
2509 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2510 {
2511 int result;
2512 int UxxxStatus;
2513 UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2514 if (UxxxStatus)
2515 return UxxxStatus;
2516 result = ftdi_elan_check_controller(ftdi, quirk);
2517 UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2518 if (UxxxStatus)
2519 return UxxxStatus;
2520 return result;
2521 }
2522
2523 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2524 {
2525 u32 controlreg;
2526 u8 sensebits;
2527 int UxxxStatus;
2528 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2529 if (UxxxStatus)
2530 return UxxxStatus;
2531 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2532 if (UxxxStatus)
2533 return UxxxStatus;
2534 msleep(750);
2535 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2536 if (UxxxStatus)
2537 return UxxxStatus;
2538 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2539 if (UxxxStatus)
2540 return UxxxStatus;
2541 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2542 if (UxxxStatus)
2543 return UxxxStatus;
2544 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2545 if (UxxxStatus)
2546 return UxxxStatus;
2547 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2548 if (UxxxStatus)
2549 return UxxxStatus;
2550 msleep(250);
2551 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2552 if (UxxxStatus)
2553 return UxxxStatus;
2554 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2555 if (UxxxStatus)
2556 return UxxxStatus;
2557 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2558 if (UxxxStatus)
2559 return UxxxStatus;
2560 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2561 if (UxxxStatus)
2562 return UxxxStatus;
2563 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2564 if (UxxxStatus)
2565 return UxxxStatus;
2566 msleep(1000);
2567 sensebits = (controlreg >> 16) & 0x000F;
2568 if (0x0D == sensebits)
2569 return 0;
2570 else
2571 return - ENXIO;
2572 }
2573
2574 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2575 {
2576 int UxxxStatus;
2577 u32 pcidata;
2578 int reg = 0;
2579 u8 fn;
2580 int activePCIfn = 0;
2581 int max_devices = 0;
2582 int controllers = 0;
2583 int unrecognized = 0;
2584 ftdi->function = 0;
2585 for (fn = 0; (fn < 4); fn++) {
2586 u32 pciVID = 0;
2587 u32 pciPID = 0;
2588 int devices = 0;
2589 activePCIfn = fn << 8;
2590 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2591 &pcidata);
2592 if (UxxxStatus)
2593 return UxxxStatus;
2594 pciVID = pcidata & 0xFFFF;
2595 pciPID = (pcidata >> 16) & 0xFFFF;
2596 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2597 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2598 controllers += 1;
2599 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2600 {
2601 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2602 controllers += 1;
2603 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2604 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2605 controllers += 1;
2606 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2607 {
2608 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2609 controllers += 1;
2610 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2611 devices = ftdi_elan_found_controller(ftdi, fn,
2612 OHCI_QUIRK_AMD756);
2613 controllers += 1;
2614 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2615 devices = ftdi_elan_found_controller(ftdi, fn,
2616 OHCI_QUIRK_ZFMICRO);
2617 controllers += 1;
2618 } else if (0 == pcidata) {
2619 } else
2620 unrecognized += 1;
2621 if (devices > max_devices) {
2622 max_devices = devices;
2623 ftdi->function = fn + 1;
2624 ftdi->platform_data.vendor = pciVID;
2625 ftdi->platform_data.device = pciPID;
2626 }
2627 }
2628 if (ftdi->function > 0) {
2629 return ftdi_elan_setup_controller(ftdi, ftdi->function - 1);
2630 } else if (controllers > 0) {
2631 return -ENXIO;
2632 } else if (unrecognized > 0) {
2633 return -ENXIO;
2634 } else {
2635 ftdi->enumerated = 0;
2636 return -ENXIO;
2637 }
2638 }
2639
2640
2641 /*
2642 * we use only the first bulk-in and bulk-out endpoints
2643 */
2644 static int ftdi_elan_probe(struct usb_interface *interface,
2645 const struct usb_device_id *id)
2646 {
2647 struct usb_host_interface *iface_desc;
2648 struct usb_endpoint_descriptor *bulk_in, *bulk_out;
2649 int retval;
2650 struct usb_ftdi *ftdi;
2651
2652 ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2653 if (!ftdi)
2654 return -ENOMEM;
2655
2656 mutex_lock(&ftdi_module_lock);
2657 list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2658 ftdi->sequence_num = ++ftdi_instances;
2659 mutex_unlock(&ftdi_module_lock);
2660 ftdi_elan_init_kref(ftdi);
2661 sema_init(&ftdi->sw_lock, 1);
2662 ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2663 ftdi->interface = interface;
2664 mutex_init(&ftdi->u132_lock);
2665 ftdi->expected = 4;
2666
2667 iface_desc = interface->cur_altsetting;
2668 retval = usb_find_common_endpoints(iface_desc,
2669 &bulk_in, &bulk_out, NULL, NULL);
2670 if (retval) {
2671 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2672 goto error;
2673 }
2674
2675 ftdi->bulk_in_size = usb_endpoint_maxp(bulk_in);
2676 ftdi->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
2677 ftdi->bulk_in_buffer = kmalloc(ftdi->bulk_in_size, GFP_KERNEL);
2678 if (!ftdi->bulk_in_buffer) {
2679 retval = -ENOMEM;
2680 goto error;
2681 }
2682
2683 ftdi->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
2684
2685 dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2686 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2687 ftdi->bulk_out_endpointAddr);
2688 usb_set_intfdata(interface, ftdi);
2689 if (iface_desc->desc.bInterfaceNumber == 0 &&
2690 ftdi->bulk_in_endpointAddr == 0x81 &&
2691 ftdi->bulk_out_endpointAddr == 0x02) {
2692 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2693 if (retval) {
2694 dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2695 usb_set_intfdata(interface, NULL);
2696 retval = -ENOMEM;
2697 goto error;
2698 } else {
2699 ftdi->class = &ftdi_elan_jtag_class;
2700 dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2701 ftdi, iface_desc->desc.bInterfaceNumber,
2702 interface->minor);
2703 return 0;
2704 }
2705 } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2706 ftdi->bulk_in_endpointAddr == 0x83 &&
2707 ftdi->bulk_out_endpointAddr == 0x04) {
2708 ftdi->class = NULL;
2709 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2710 ftdi, iface_desc->desc.bInterfaceNumber);
2711 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2712 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2713 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2714 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2715 return 0;
2716 } else {
2717 dev_err(&ftdi->udev->dev,
2718 "Could not find ELAN's U132 device\n");
2719 retval = -ENODEV;
2720 goto error;
2721 }
2722 error:if (ftdi) {
2723 ftdi_elan_put_kref(ftdi);
2724 }
2725 return retval;
2726 }
2727
2728 static void ftdi_elan_disconnect(struct usb_interface *interface)
2729 {
2730 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2731 ftdi->disconnected += 1;
2732 if (ftdi->class) {
2733 int minor = interface->minor;
2734 struct usb_class_driver *class = ftdi->class;
2735 usb_set_intfdata(interface, NULL);
2736 usb_deregister_dev(interface, class);
2737 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2738 minor);
2739 } else {
2740 ftdi_status_cancel_work(ftdi);
2741 ftdi_command_cancel_work(ftdi);
2742 ftdi_response_cancel_work(ftdi);
2743 ftdi_elan_abandon_completions(ftdi);
2744 ftdi_elan_abandon_targets(ftdi);
2745 if (ftdi->registered) {
2746 platform_device_unregister(&ftdi->platform_dev);
2747 ftdi->synchronized = 0;
2748 ftdi->enumerated = 0;
2749 ftdi->initialized = 0;
2750 ftdi->registered = 0;
2751 }
2752 ftdi->disconnected += 1;
2753 usb_set_intfdata(interface, NULL);
2754 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2755 }
2756 ftdi_elan_put_kref(ftdi);
2757 }
2758
2759 static struct usb_driver ftdi_elan_driver = {
2760 .name = "ftdi-elan",
2761 .probe = ftdi_elan_probe,
2762 .disconnect = ftdi_elan_disconnect,
2763 .id_table = ftdi_elan_table,
2764 };
2765 static int __init ftdi_elan_init(void)
2766 {
2767 int result;
2768 pr_info("driver %s\n", ftdi_elan_driver.name);
2769 mutex_init(&ftdi_module_lock);
2770 INIT_LIST_HEAD(&ftdi_static_list);
2771 result = usb_register(&ftdi_elan_driver);
2772 if (result) {
2773 pr_err("usb_register failed. Error number %d\n", result);
2774 }
2775 return result;
2776
2777 }
2778
2779 static void __exit ftdi_elan_exit(void)
2780 {
2781 struct usb_ftdi *ftdi;
2782 struct usb_ftdi *temp;
2783 usb_deregister(&ftdi_elan_driver);
2784 pr_info("ftdi_u132 driver deregistered\n");
2785 list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2786 ftdi_status_cancel_work(ftdi);
2787 ftdi_command_cancel_work(ftdi);
2788 ftdi_response_cancel_work(ftdi);
2789 }
2790 }
2791
2792
2793 module_init(ftdi_elan_init);
2794 module_exit(ftdi_elan_exit);
Linux with added FPC-III support