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include/linux/sched/mm.h: re-inline mmdrop()
[linux/fpc-iii.git] / drivers / usb / misc / ftdi-elan.c
blob76c718ac8c78d1189a91f33b778a3600cec1856b
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 int empty_packets = 0;
919 read:{
920 int packet_bytes = 0;
921 int retval = usb_bulk_msg(ftdi->udev,
922 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
923 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
924 &packet_bytes, 500);
925 char diag[30 *3 + 4];
926 char *d = diag;
927 int m = packet_bytes;
928 u8 *c = ftdi->bulk_in_buffer;
929 int s = (sizeof(diag) - 1) / 3;
930 diag[0] = 0;
931 while (s-- > 0 && m-- > 0) {
932 if (s > 0 || m == 0) {
933 d += sprintf(d, " %02X", *c++);
934 } else
935 d += sprintf(d, " ..");
936 }
937 if (packet_bytes > 2) {
938 ftdi->bulk_in_left = packet_bytes - 2;
939 ftdi->bulk_in_last = 1;
940 goto have;
941 } else if (retval == -ETIMEDOUT) {
942 if (retry_on_timeout-- > 0) {
943 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
944 packet_bytes, bytes_read, diag);
945 goto more;
946 } else if (bytes_read > 0) {
947 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
948 bytes_read, diag);
949 return -ENOMEM;
950 } else {
951 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
952 packet_bytes, bytes_read, diag);
953 return -ENOMEM;
954 }
955 } else if (retval == -EILSEQ) {
956 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
957 retval, packet_bytes, bytes_read, diag);
958 return retval;
959 } else if (retval) {
960 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
961 retval, packet_bytes, bytes_read, diag);
962 return retval;
963 } else if (packet_bytes == 2) {
964 unsigned char s0 = ftdi->bulk_in_buffer[0];
965 unsigned char s1 = ftdi->bulk_in_buffer[1];
966 empty_packets += 1;
967 if (s0 == 0x31 && s1 == 0x60) {
968 if (retry_on_empty-- > 0) {
969 goto more;
970 } else
971 return 0;
972 } else if (s0 == 0x31 && s1 == 0x00) {
973 if (retry_on_empty-- > 0) {
974 goto more;
975 } else
976 return 0;
977 } else {
978 if (retry_on_empty-- > 0) {
979 goto more;
980 } else
981 return 0;
982 }
983 } else if (packet_bytes == 1) {
984 if (retry_on_empty-- > 0) {
985 goto more;
986 } else
987 return 0;
988 } else {
989 if (retry_on_empty-- > 0) {
990 goto more;
991 } else
992 return 0;
993 }
994 }
995 more:{
996 goto read;
997 }
998 have:if (ftdi->bulk_in_left > 0) {
999 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1000 bytes_read += 1;
1001 ftdi->bulk_in_left -= 1;
1002 if (ftdi->received == 0 && c == 0xFF) {
1003 goto have;
1004 } else
1005 *b++ = c;
1006 if (++ftdi->received < ftdi->expected) {
1007 goto have;
1008 } else if (ftdi->ed_found) {
1009 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1010 u16 ed_length = (ftdi->response[2] << 8) |
1011 ftdi->response[1];
1012 struct u132_target *target = &ftdi->target[ed_number];
1013 int payload = (ed_length >> 0) & 0x07FF;
1014 char diag[30 *3 + 4];
1015 char *d = diag;
1016 int m = payload;
1017 u8 *c = 4 + ftdi->response;
1018 int s = (sizeof(diag) - 1) / 3;
1019 diag[0] = 0;
1020 while (s-- > 0 && m-- > 0) {
1021 if (s > 0 || m == 0) {
1022 d += sprintf(d, " %02X", *c++);
1023 } else
1024 d += sprintf(d, " ..");
1025 }
1026 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1027 payload);
1028 ftdi->received = 0;
1029 ftdi->expected = 4;
1030 ftdi->ed_found = 0;
1031 b = ftdi->response;
1032 goto have;
1033 } else if (ftdi->expected == 8) {
1034 u8 buscmd;
1035 int respond_head = ftdi->respond_head++;
1036 struct u132_respond *respond = &ftdi->respond[
1037 RESPOND_MASK & respond_head];
1038 u32 data = ftdi->response[7];
1039 data <<= 8;
1040 data |= ftdi->response[6];
1041 data <<= 8;
1042 data |= ftdi->response[5];
1043 data <<= 8;
1044 data |= ftdi->response[4];
1045 *respond->value = data;
1046 *respond->result = 0;
1047 complete(&respond->wait_completion);
1048 ftdi->received = 0;
1049 ftdi->expected = 4;
1050 ftdi->ed_found = 0;
1051 b = ftdi->response;
1052 buscmd = (ftdi->response[0] >> 0) & 0x0F;
1053 if (buscmd == 0x00) {
1054 } else if (buscmd == 0x02) {
1055 } else if (buscmd == 0x06) {
1056 } else if (buscmd == 0x0A) {
1057 } else
1058 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1059 buscmd, data);
1060 goto have;
1061 } else {
1062 if ((ftdi->response[0] & 0x80) == 0x00) {
1063 ftdi->expected = 8;
1064 goto have;
1065 } else {
1066 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1067 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1068 u16 ed_length = (ftdi->response[2] << 8) |
1069 ftdi->response[1];
1070 struct u132_target *target = &ftdi->target[
1071 ed_number];
1072 target->halted = (ftdi->response[0] >> 3) &
1073 0x01;
1074 target->skipped = (ftdi->response[0] >> 2) &
1075 0x01;
1076 target->toggle_bits = (ftdi->response[3] >> 6)
1077 & 0x03;
1078 target->error_count = (ftdi->response[3] >> 4)
1079 & 0x03;
1080 target->condition_code = (ftdi->response[
1081 3] >> 0) & 0x0F;
1082 if ((ftdi->response[0] & 0x10) == 0x00) {
1083 b = have_ed_set_response(ftdi, target,
1084 ed_length, ed_number, ed_type,
1085 b);
1086 goto have;
1087 } else {
1088 b = have_ed_get_response(ftdi, target,
1089 ed_length, ed_number, ed_type,
1090 b);
1091 goto have;
1092 }
1093 }
1094 }
1095 } else
1096 goto more;
1097 }
1098
1099
1100 /*
1101 * create a urb, and a buffer for it, and copy the data to the urb
1102 *
1103 */
1104 static ssize_t ftdi_elan_write(struct file *file,
1105 const char __user *user_buffer, size_t count,
1106 loff_t *ppos)
1107 {
1108 int retval = 0;
1109 struct urb *urb;
1110 char *buf;
1111 struct usb_ftdi *ftdi = file->private_data;
1112
1113 if (ftdi->disconnected > 0) {
1114 return -ENODEV;
1115 }
1116 if (count == 0) {
1117 goto exit;
1118 }
1119 urb = usb_alloc_urb(0, GFP_KERNEL);
1120 if (!urb) {
1121 retval = -ENOMEM;
1122 goto error_1;
1123 }
1124 buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1125 &urb->transfer_dma);
1126 if (!buf) {
1127 retval = -ENOMEM;
1128 goto error_2;
1129 }
1130 if (copy_from_user(buf, user_buffer, count)) {
1131 retval = -EFAULT;
1132 goto error_3;
1133 }
1134 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1135 ftdi->bulk_out_endpointAddr), buf, count,
1136 ftdi_elan_write_bulk_callback, ftdi);
1137 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1138 retval = usb_submit_urb(urb, GFP_KERNEL);
1139 if (retval) {
1140 dev_err(&ftdi->udev->dev,
1141 "failed submitting write urb, error %d\n", retval);
1142 goto error_3;
1143 }
1144 usb_free_urb(urb);
1145
1146 exit:
1147 return count;
1148 error_3:
1149 usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1150 error_2:
1151 usb_free_urb(urb);
1152 error_1:
1153 return retval;
1154 }
1155
1156 static const struct file_operations ftdi_elan_fops = {
1157 .owner = THIS_MODULE,
1158 .llseek = no_llseek,
1159 .read = ftdi_elan_read,
1160 .write = ftdi_elan_write,
1161 .open = ftdi_elan_open,
1162 .release = ftdi_elan_release,
1163 };
1164
1165 /*
1166 * usb class driver info in order to get a minor number from the usb core,
1167 * and to have the device registered with the driver core
1168 */
1169 static struct usb_class_driver ftdi_elan_jtag_class = {
1170 .name = "ftdi-%d-jtag",
1171 .fops = &ftdi_elan_fops,
1172 .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1173 };
1174
1175 /*
1176 * the following definitions are for the
1177 * ELAN FPGA state machgine processor that
1178 * lies on the other side of the FTDI chip
1179 */
1180 #define cPCIu132rd 0x0
1181 #define cPCIu132wr 0x1
1182 #define cPCIiord 0x2
1183 #define cPCIiowr 0x3
1184 #define cPCImemrd 0x6
1185 #define cPCImemwr 0x7
1186 #define cPCIcfgrd 0xA
1187 #define cPCIcfgwr 0xB
1188 #define cPCInull 0xF
1189 #define cU132cmd_status 0x0
1190 #define cU132flash 0x1
1191 #define cPIDsetup 0x0
1192 #define cPIDout 0x1
1193 #define cPIDin 0x2
1194 #define cPIDinonce 0x3
1195 #define cCCnoerror 0x0
1196 #define cCCcrc 0x1
1197 #define cCCbitstuff 0x2
1198 #define cCCtoggle 0x3
1199 #define cCCstall 0x4
1200 #define cCCnoresp 0x5
1201 #define cCCbadpid1 0x6
1202 #define cCCbadpid2 0x7
1203 #define cCCdataoverrun 0x8
1204 #define cCCdataunderrun 0x9
1205 #define cCCbuffoverrun 0xC
1206 #define cCCbuffunderrun 0xD
1207 #define cCCnotaccessed 0xF
1208 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1209 {
1210 wait:if (ftdi->disconnected > 0) {
1211 return -ENODEV;
1212 } else {
1213 int command_size;
1214 mutex_lock(&ftdi->u132_lock);
1215 command_size = ftdi->command_next - ftdi->command_head;
1216 if (command_size < COMMAND_SIZE) {
1217 struct u132_command *command = &ftdi->command[
1218 COMMAND_MASK & ftdi->command_next];
1219 command->header = 0x00 | cPCIu132wr;
1220 command->length = 0x04;
1221 command->address = 0x00;
1222 command->width = 0x00;
1223 command->follows = 4;
1224 command->value = data;
1225 command->buffer = &command->value;
1226 ftdi->command_next += 1;
1227 ftdi_elan_kick_command_queue(ftdi);
1228 mutex_unlock(&ftdi->u132_lock);
1229 return 0;
1230 } else {
1231 mutex_unlock(&ftdi->u132_lock);
1232 msleep(100);
1233 goto wait;
1234 }
1235 }
1236 }
1237
1238 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1239 u8 width, u32 data)
1240 {
1241 u8 addressofs = config_offset / 4;
1242 wait:if (ftdi->disconnected > 0) {
1243 return -ENODEV;
1244 } else {
1245 int command_size;
1246 mutex_lock(&ftdi->u132_lock);
1247 command_size = ftdi->command_next - ftdi->command_head;
1248 if (command_size < COMMAND_SIZE) {
1249 struct u132_command *command = &ftdi->command[
1250 COMMAND_MASK & ftdi->command_next];
1251 command->header = 0x00 | (cPCIcfgwr & 0x0F);
1252 command->length = 0x04;
1253 command->address = addressofs;
1254 command->width = 0x00 | (width & 0x0F);
1255 command->follows = 4;
1256 command->value = data;
1257 command->buffer = &command->value;
1258 ftdi->command_next += 1;
1259 ftdi_elan_kick_command_queue(ftdi);
1260 mutex_unlock(&ftdi->u132_lock);
1261 return 0;
1262 } else {
1263 mutex_unlock(&ftdi->u132_lock);
1264 msleep(100);
1265 goto wait;
1266 }
1267 }
1268 }
1269
1270 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1271 u8 width, u32 data)
1272 {
1273 u8 addressofs = mem_offset / 4;
1274 wait:if (ftdi->disconnected > 0) {
1275 return -ENODEV;
1276 } else {
1277 int command_size;
1278 mutex_lock(&ftdi->u132_lock);
1279 command_size = ftdi->command_next - ftdi->command_head;
1280 if (command_size < COMMAND_SIZE) {
1281 struct u132_command *command = &ftdi->command[
1282 COMMAND_MASK & ftdi->command_next];
1283 command->header = 0x00 | (cPCImemwr & 0x0F);
1284 command->length = 0x04;
1285 command->address = addressofs;
1286 command->width = 0x00 | (width & 0x0F);
1287 command->follows = 4;
1288 command->value = data;
1289 command->buffer = &command->value;
1290 ftdi->command_next += 1;
1291 ftdi_elan_kick_command_queue(ftdi);
1292 mutex_unlock(&ftdi->u132_lock);
1293 return 0;
1294 } else {
1295 mutex_unlock(&ftdi->u132_lock);
1296 msleep(100);
1297 goto wait;
1298 }
1299 }
1300 }
1301
1302 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1303 u8 width, u32 data)
1304 {
1305 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1306 return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1307 }
1308
1309
1310 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1311 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1312 {
1313 wait:if (ftdi->disconnected > 0) {
1314 return -ENODEV;
1315 } else {
1316 int command_size;
1317 int respond_size;
1318 mutex_lock(&ftdi->u132_lock);
1319 command_size = ftdi->command_next - ftdi->command_head;
1320 respond_size = ftdi->respond_next - ftdi->respond_head;
1321 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1322 {
1323 struct u132_command *command = &ftdi->command[
1324 COMMAND_MASK & ftdi->command_next];
1325 struct u132_respond *respond = &ftdi->respond[
1326 RESPOND_MASK & ftdi->respond_next];
1327 int result = -ENODEV;
1328 respond->result = &result;
1329 respond->header = command->header = 0x00 | cPCIu132rd;
1330 command->length = 0x04;
1331 respond->address = command->address = cU132cmd_status;
1332 command->width = 0x00;
1333 command->follows = 0;
1334 command->value = 0;
1335 command->buffer = NULL;
1336 respond->value = data;
1337 init_completion(&respond->wait_completion);
1338 ftdi->command_next += 1;
1339 ftdi->respond_next += 1;
1340 ftdi_elan_kick_command_queue(ftdi);
1341 mutex_unlock(&ftdi->u132_lock);
1342 wait_for_completion(&respond->wait_completion);
1343 return result;
1344 } else {
1345 mutex_unlock(&ftdi->u132_lock);
1346 msleep(100);
1347 goto wait;
1348 }
1349 }
1350 }
1351
1352 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1353 u8 width, u32 *data)
1354 {
1355 u8 addressofs = config_offset / 4;
1356 wait:if (ftdi->disconnected > 0) {
1357 return -ENODEV;
1358 } else {
1359 int command_size;
1360 int respond_size;
1361 mutex_lock(&ftdi->u132_lock);
1362 command_size = ftdi->command_next - ftdi->command_head;
1363 respond_size = ftdi->respond_next - ftdi->respond_head;
1364 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1365 {
1366 struct u132_command *command = &ftdi->command[
1367 COMMAND_MASK & ftdi->command_next];
1368 struct u132_respond *respond = &ftdi->respond[
1369 RESPOND_MASK & ftdi->respond_next];
1370 int result = -ENODEV;
1371 respond->result = &result;
1372 respond->header = command->header = 0x00 | (cPCIcfgrd &
1373 0x0F);
1374 command->length = 0x04;
1375 respond->address = command->address = addressofs;
1376 command->width = 0x00 | (width & 0x0F);
1377 command->follows = 0;
1378 command->value = 0;
1379 command->buffer = NULL;
1380 respond->value = data;
1381 init_completion(&respond->wait_completion);
1382 ftdi->command_next += 1;
1383 ftdi->respond_next += 1;
1384 ftdi_elan_kick_command_queue(ftdi);
1385 mutex_unlock(&ftdi->u132_lock);
1386 wait_for_completion(&respond->wait_completion);
1387 return result;
1388 } else {
1389 mutex_unlock(&ftdi->u132_lock);
1390 msleep(100);
1391 goto wait;
1392 }
1393 }
1394 }
1395
1396 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1397 u8 width, u32 *data)
1398 {
1399 u8 addressofs = mem_offset / 4;
1400 wait:if (ftdi->disconnected > 0) {
1401 return -ENODEV;
1402 } else {
1403 int command_size;
1404 int respond_size;
1405 mutex_lock(&ftdi->u132_lock);
1406 command_size = ftdi->command_next - ftdi->command_head;
1407 respond_size = ftdi->respond_next - ftdi->respond_head;
1408 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1409 {
1410 struct u132_command *command = &ftdi->command[
1411 COMMAND_MASK & ftdi->command_next];
1412 struct u132_respond *respond = &ftdi->respond[
1413 RESPOND_MASK & ftdi->respond_next];
1414 int result = -ENODEV;
1415 respond->result = &result;
1416 respond->header = command->header = 0x00 | (cPCImemrd &
1417 0x0F);
1418 command->length = 0x04;
1419 respond->address = command->address = addressofs;
1420 command->width = 0x00 | (width & 0x0F);
1421 command->follows = 0;
1422 command->value = 0;
1423 command->buffer = NULL;
1424 respond->value = data;
1425 init_completion(&respond->wait_completion);
1426 ftdi->command_next += 1;
1427 ftdi->respond_next += 1;
1428 ftdi_elan_kick_command_queue(ftdi);
1429 mutex_unlock(&ftdi->u132_lock);
1430 wait_for_completion(&respond->wait_completion);
1431 return result;
1432 } else {
1433 mutex_unlock(&ftdi->u132_lock);
1434 msleep(100);
1435 goto wait;
1436 }
1437 }
1438 }
1439
1440 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1441 u8 width, u32 *data)
1442 {
1443 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1444 if (ftdi->initialized == 0) {
1445 return -ENODEV;
1446 } else
1447 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1448 }
1449
1450
1451 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1452 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1453 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1454 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1455 int toggle_bits, int error_count, int condition_code, int repeat_number,
1456 int halted, int skipped, int actual, int non_null))
1457 {
1458 u8 ed = ed_number - 1;
1459 wait:if (ftdi->disconnected > 0) {
1460 return -ENODEV;
1461 } else if (ftdi->initialized == 0) {
1462 return -ENODEV;
1463 } else {
1464 int command_size;
1465 mutex_lock(&ftdi->u132_lock);
1466 command_size = ftdi->command_next - ftdi->command_head;
1467 if (command_size < COMMAND_SIZE) {
1468 struct u132_target *target = &ftdi->target[ed];
1469 struct u132_command *command = &ftdi->command[
1470 COMMAND_MASK & ftdi->command_next];
1471 command->header = 0x80 | (ed << 5);
1472 command->length = 0x8007;
1473 command->address = (toggle_bits << 6) | (ep_number << 2)
1474 | (address << 0);
1475 command->width = usb_maxpacket(urb->dev, urb->pipe,
1476 usb_pipeout(urb->pipe));
1477 command->follows = 8;
1478 command->value = 0;
1479 command->buffer = urb->setup_packet;
1480 target->callback = callback;
1481 target->endp = endp;
1482 target->urb = urb;
1483 target->active = 1;
1484 ftdi->command_next += 1;
1485 ftdi_elan_kick_command_queue(ftdi);
1486 mutex_unlock(&ftdi->u132_lock);
1487 return 0;
1488 } else {
1489 mutex_unlock(&ftdi->u132_lock);
1490 msleep(100);
1491 goto wait;
1492 }
1493 }
1494 }
1495
1496 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1497 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1498 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1499 int toggle_bits, int error_count, int condition_code, int repeat_number,
1500 int halted, int skipped, int actual, int non_null))
1501 {
1502 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1503 return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1504 ep_number, toggle_bits, callback);
1505 }
1506
1507
1508 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1509 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1510 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1511 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1512 int toggle_bits, int error_count, int condition_code, int repeat_number,
1513 int halted, int skipped, int actual, int non_null))
1514 {
1515 u8 ed = ed_number - 1;
1516 wait:if (ftdi->disconnected > 0) {
1517 return -ENODEV;
1518 } else if (ftdi->initialized == 0) {
1519 return -ENODEV;
1520 } else {
1521 int command_size;
1522 mutex_lock(&ftdi->u132_lock);
1523 command_size = ftdi->command_next - ftdi->command_head;
1524 if (command_size < COMMAND_SIZE) {
1525 struct u132_target *target = &ftdi->target[ed];
1526 struct u132_command *command = &ftdi->command[
1527 COMMAND_MASK & ftdi->command_next];
1528 u32 remaining_length = urb->transfer_buffer_length -
1529 urb->actual_length;
1530 command->header = 0x82 | (ed << 5);
1531 if (remaining_length == 0) {
1532 command->length = 0x0000;
1533 } else if (remaining_length > 1024) {
1534 command->length = 0x8000 | 1023;
1535 } else
1536 command->length = 0x8000 | (remaining_length -
1537 1);
1538 command->address = (toggle_bits << 6) | (ep_number << 2)
1539 | (address << 0);
1540 command->width = usb_maxpacket(urb->dev, urb->pipe,
1541 usb_pipeout(urb->pipe));
1542 command->follows = 0;
1543 command->value = 0;
1544 command->buffer = NULL;
1545 target->callback = callback;
1546 target->endp = endp;
1547 target->urb = urb;
1548 target->active = 1;
1549 ftdi->command_next += 1;
1550 ftdi_elan_kick_command_queue(ftdi);
1551 mutex_unlock(&ftdi->u132_lock);
1552 return 0;
1553 } else {
1554 mutex_unlock(&ftdi->u132_lock);
1555 msleep(100);
1556 goto wait;
1557 }
1558 }
1559 }
1560
1561 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1562 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1563 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1564 int toggle_bits, int error_count, int condition_code, int repeat_number,
1565 int halted, int skipped, int actual, int non_null))
1566 {
1567 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1568 return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1569 ep_number, toggle_bits, callback);
1570 }
1571
1572
1573 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1574 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1575 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1576 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1577 int toggle_bits, int error_count, int condition_code, int repeat_number,
1578 int halted, int skipped, int actual, int non_null))
1579 {
1580 u8 ed = ed_number - 1;
1581 wait:if (ftdi->disconnected > 0) {
1582 return -ENODEV;
1583 } else if (ftdi->initialized == 0) {
1584 return -ENODEV;
1585 } else {
1586 int command_size;
1587 mutex_lock(&ftdi->u132_lock);
1588 command_size = ftdi->command_next - ftdi->command_head;
1589 if (command_size < COMMAND_SIZE) {
1590 struct u132_target *target = &ftdi->target[ed];
1591 struct u132_command *command = &ftdi->command[
1592 COMMAND_MASK & ftdi->command_next];
1593 command->header = 0x81 | (ed << 5);
1594 command->length = 0x0000;
1595 command->address = (toggle_bits << 6) | (ep_number << 2)
1596 | (address << 0);
1597 command->width = usb_maxpacket(urb->dev, urb->pipe,
1598 usb_pipeout(urb->pipe));
1599 command->follows = 0;
1600 command->value = 0;
1601 command->buffer = NULL;
1602 target->callback = callback;
1603 target->endp = endp;
1604 target->urb = urb;
1605 target->active = 1;
1606 ftdi->command_next += 1;
1607 ftdi_elan_kick_command_queue(ftdi);
1608 mutex_unlock(&ftdi->u132_lock);
1609 return 0;
1610 } else {
1611 mutex_unlock(&ftdi->u132_lock);
1612 msleep(100);
1613 goto wait;
1614 }
1615 }
1616 }
1617
1618 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1619 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1620 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1621 int toggle_bits, int error_count, int condition_code, int repeat_number,
1622 int halted, int skipped, int actual, int non_null))
1623 {
1624 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1625 return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1626 ep_number, toggle_bits, callback);
1627 }
1628
1629
1630 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1631 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1632 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1633 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1634 int toggle_bits, int error_count, int condition_code, int repeat_number,
1635 int halted, int skipped, int actual, int non_null))
1636 {
1637 u8 ed = ed_number - 1;
1638 wait:if (ftdi->disconnected > 0) {
1639 return -ENODEV;
1640 } else if (ftdi->initialized == 0) {
1641 return -ENODEV;
1642 } else {
1643 int command_size;
1644 mutex_lock(&ftdi->u132_lock);
1645 command_size = ftdi->command_next - ftdi->command_head;
1646 if (command_size < COMMAND_SIZE) {
1647 u8 *b;
1648 u16 urb_size;
1649 int i = 0;
1650 char data[30 *3 + 4];
1651 char *d = data;
1652 int m = (sizeof(data) - 1) / 3 - 1;
1653 int l = 0;
1654 struct u132_target *target = &ftdi->target[ed];
1655 struct u132_command *command = &ftdi->command[
1656 COMMAND_MASK & ftdi->command_next];
1657 command->header = 0x81 | (ed << 5);
1658 command->address = (toggle_bits << 6) | (ep_number << 2)
1659 | (address << 0);
1660 command->width = usb_maxpacket(urb->dev, urb->pipe,
1661 usb_pipeout(urb->pipe));
1662 command->follows = min_t(u32, 1024,
1663 urb->transfer_buffer_length -
1664 urb->actual_length);
1665 command->value = 0;
1666 command->buffer = urb->transfer_buffer +
1667 urb->actual_length;
1668 command->length = 0x8000 | (command->follows - 1);
1669 b = command->buffer;
1670 urb_size = command->follows;
1671 data[0] = 0;
1672 while (urb_size-- > 0) {
1673 if (i > m) {
1674 } else if (i++ < m) {
1675 int w = sprintf(d, " %02X", *b++);
1676 d += w;
1677 l += w;
1678 } else
1679 d += sprintf(d, " ..");
1680 }
1681 target->callback = callback;
1682 target->endp = endp;
1683 target->urb = urb;
1684 target->active = 1;
1685 ftdi->command_next += 1;
1686 ftdi_elan_kick_command_queue(ftdi);
1687 mutex_unlock(&ftdi->u132_lock);
1688 return 0;
1689 } else {
1690 mutex_unlock(&ftdi->u132_lock);
1691 msleep(100);
1692 goto wait;
1693 }
1694 }
1695 }
1696
1697 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1698 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1699 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1700 int toggle_bits, int error_count, int condition_code, int repeat_number,
1701 int halted, int skipped, int actual, int non_null))
1702 {
1703 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1704 return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1705 ep_number, toggle_bits, callback);
1706 }
1707
1708
1709 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1710 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1711 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1712 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1713 int toggle_bits, int error_count, int condition_code, int repeat_number,
1714 int halted, int skipped, int actual, int non_null))
1715 {
1716 u8 ed = ed_number - 1;
1717 wait:if (ftdi->disconnected > 0) {
1718 return -ENODEV;
1719 } else if (ftdi->initialized == 0) {
1720 return -ENODEV;
1721 } else {
1722 int command_size;
1723 mutex_lock(&ftdi->u132_lock);
1724 command_size = ftdi->command_next - ftdi->command_head;
1725 if (command_size < COMMAND_SIZE) {
1726 u32 remaining_length = urb->transfer_buffer_length -
1727 urb->actual_length;
1728 struct u132_target *target = &ftdi->target[ed];
1729 struct u132_command *command = &ftdi->command[
1730 COMMAND_MASK & ftdi->command_next];
1731 command->header = 0x83 | (ed << 5);
1732 if (remaining_length == 0) {
1733 command->length = 0x0000;
1734 } else if (remaining_length > 1024) {
1735 command->length = 0x8000 | 1023;
1736 } else
1737 command->length = 0x8000 | (remaining_length -
1738 1);
1739 command->address = (toggle_bits << 6) | (ep_number << 2)
1740 | (address << 0);
1741 command->width = usb_maxpacket(urb->dev, urb->pipe,
1742 usb_pipeout(urb->pipe));
1743 command->follows = 0;
1744 command->value = 0;
1745 command->buffer = NULL;
1746 target->callback = callback;
1747 target->endp = endp;
1748 target->urb = urb;
1749 target->active = 1;
1750 ftdi->command_next += 1;
1751 ftdi_elan_kick_command_queue(ftdi);
1752 mutex_unlock(&ftdi->u132_lock);
1753 return 0;
1754 } else {
1755 mutex_unlock(&ftdi->u132_lock);
1756 msleep(100);
1757 goto wait;
1758 }
1759 }
1760 }
1761
1762 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1763 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1764 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1765 int toggle_bits, int error_count, int condition_code, int repeat_number,
1766 int halted, int skipped, int actual, int non_null))
1767 {
1768 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1769 return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1770 ep_number, toggle_bits, callback);
1771 }
1772
1773
1774 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1775 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1776 void *endp)
1777 {
1778 u8 ed = ed_number - 1;
1779 if (ftdi->disconnected > 0) {
1780 return -ENODEV;
1781 } else if (ftdi->initialized == 0) {
1782 return -ENODEV;
1783 } else {
1784 struct u132_target *target = &ftdi->target[ed];
1785 mutex_lock(&ftdi->u132_lock);
1786 if (target->abandoning > 0) {
1787 mutex_unlock(&ftdi->u132_lock);
1788 return 0;
1789 } else {
1790 target->abandoning = 1;
1791 wait_1:if (target->active == 1) {
1792 int command_size = ftdi->command_next -
1793 ftdi->command_head;
1794 if (command_size < COMMAND_SIZE) {
1795 struct u132_command *command =
1796 &ftdi->command[COMMAND_MASK &
1797 ftdi->command_next];
1798 command->header = 0x80 | (ed << 5) |
1799 0x4;
1800 command->length = 0x00;
1801 command->address = 0x00;
1802 command->width = 0x00;
1803 command->follows = 0;
1804 command->value = 0;
1805 command->buffer = &command->value;
1806 ftdi->command_next += 1;
1807 ftdi_elan_kick_command_queue(ftdi);
1808 } else {
1809 mutex_unlock(&ftdi->u132_lock);
1810 msleep(100);
1811 mutex_lock(&ftdi->u132_lock);
1812 goto wait_1;
1813 }
1814 }
1815 mutex_unlock(&ftdi->u132_lock);
1816 return 0;
1817 }
1818 }
1819 }
1820
1821 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1822 void *endp)
1823 {
1824 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1825 return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1826 }
1827
1828
1829 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1830 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1831 {
1832 int retry_on_empty = 10;
1833 int retry_on_timeout = 5;
1834 int retry_on_status = 20;
1835 more:{
1836 int packet_bytes = 0;
1837 int retval = usb_bulk_msg(ftdi->udev,
1838 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1839 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1840 &packet_bytes, 100);
1841 if (packet_bytes > 2) {
1842 char diag[30 *3 + 4];
1843 char *d = diag;
1844 int m = (sizeof(diag) - 1) / 3 - 1;
1845 char *b = ftdi->bulk_in_buffer;
1846 int bytes_read = 0;
1847 diag[0] = 0;
1848 while (packet_bytes-- > 0) {
1849 char c = *b++;
1850 if (bytes_read < m) {
1851 d += sprintf(d, " %02X",
1852 0x000000FF & c);
1853 } else if (bytes_read > m) {
1854 } else
1855 d += sprintf(d, " ..");
1856 bytes_read += 1;
1857 continue;
1858 }
1859 goto more;
1860 } else if (packet_bytes > 1) {
1861 char s1 = ftdi->bulk_in_buffer[0];
1862 char s2 = ftdi->bulk_in_buffer[1];
1863 if (s1 == 0x31 && s2 == 0x60) {
1864 return 0;
1865 } else if (retry_on_status-- > 0) {
1866 goto more;
1867 } else {
1868 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1869 return -EFAULT;
1870 }
1871 } else if (packet_bytes > 0) {
1872 char b1 = ftdi->bulk_in_buffer[0];
1873 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1874 b1);
1875 if (retry_on_status-- > 0) {
1876 goto more;
1877 } else {
1878 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1879 return -EFAULT;
1880 }
1881 } else if (retval == -ETIMEDOUT) {
1882 if (retry_on_timeout-- > 0) {
1883 goto more;
1884 } else {
1885 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1886 return -ENOMEM;
1887 }
1888 } else if (retval == 0) {
1889 if (retry_on_empty-- > 0) {
1890 goto more;
1891 } else {
1892 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1893 return -ENOMEM;
1894 }
1895 } else {
1896 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1897 return retval;
1898 }
1899 }
1900 return -1;
1901 }
1902
1903
1904 /*
1905 * send the long flush sequence
1906 *
1907 */
1908 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1909 {
1910 int retval;
1911 struct urb *urb;
1912 char *buf;
1913 int I = 257;
1914 int i = 0;
1915 urb = usb_alloc_urb(0, GFP_KERNEL);
1916 if (!urb)
1917 return -ENOMEM;
1918 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1919 if (!buf) {
1920 dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1921 usb_free_urb(urb);
1922 return -ENOMEM;
1923 }
1924 while (I-- > 0)
1925 buf[i++] = 0x55;
1926 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1927 ftdi->bulk_out_endpointAddr), buf, i,
1928 ftdi_elan_write_bulk_callback, ftdi);
1929 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1930 retval = usb_submit_urb(urb, GFP_KERNEL);
1931 if (retval) {
1932 dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1933 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1934 usb_free_urb(urb);
1935 return -ENOMEM;
1936 }
1937 usb_free_urb(urb);
1938 return 0;
1939 }
1940
1941
1942 /*
1943 * send the reset sequence
1944 *
1945 */
1946 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1947 {
1948 int retval;
1949 struct urb *urb;
1950 char *buf;
1951 int I = 4;
1952 int i = 0;
1953 urb = usb_alloc_urb(0, GFP_KERNEL);
1954 if (!urb)
1955 return -ENOMEM;
1956 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1957 if (!buf) {
1958 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1959 usb_free_urb(urb);
1960 return -ENOMEM;
1961 }
1962 buf[i++] = 0x55;
1963 buf[i++] = 0xAA;
1964 buf[i++] = 0x5A;
1965 buf[i++] = 0xA5;
1966 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1967 ftdi->bulk_out_endpointAddr), buf, i,
1968 ftdi_elan_write_bulk_callback, ftdi);
1969 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1970 retval = usb_submit_urb(urb, GFP_KERNEL);
1971 if (retval) {
1972 dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
1973 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1974 usb_free_urb(urb);
1975 return -ENOMEM;
1976 }
1977 usb_free_urb(urb);
1978 return 0;
1979 }
1980
1981 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
1982 {
1983 int retval;
1984 int long_stop = 10;
1985 int retry_on_timeout = 5;
1986 int retry_on_empty = 10;
1987 int err_count = 0;
1988 retval = ftdi_elan_flush_input_fifo(ftdi);
1989 if (retval)
1990 return retval;
1991 ftdi->bulk_in_left = 0;
1992 ftdi->bulk_in_last = -1;
1993 while (long_stop-- > 0) {
1994 int read_stop;
1995 int read_stuck;
1996 retval = ftdi_elan_synchronize_flush(ftdi);
1997 if (retval)
1998 return retval;
1999 retval = ftdi_elan_flush_input_fifo(ftdi);
2000 if (retval)
2001 return retval;
2002 reset:retval = ftdi_elan_synchronize_reset(ftdi);
2003 if (retval)
2004 return retval;
2005 read_stop = 100;
2006 read_stuck = 10;
2007 read:{
2008 int packet_bytes = 0;
2009 retval = usb_bulk_msg(ftdi->udev,
2010 usb_rcvbulkpipe(ftdi->udev,
2011 ftdi->bulk_in_endpointAddr),
2012 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2013 &packet_bytes, 500);
2014 if (packet_bytes > 2) {
2015 char diag[30 *3 + 4];
2016 char *d = diag;
2017 int m = (sizeof(diag) - 1) / 3 - 1;
2018 char *b = ftdi->bulk_in_buffer;
2019 int bytes_read = 0;
2020 unsigned char c = 0;
2021 diag[0] = 0;
2022 while (packet_bytes-- > 0) {
2023 c = *b++;
2024 if (bytes_read < m) {
2025 d += sprintf(d, " %02X", c);
2026 } else if (bytes_read > m) {
2027 } else
2028 d += sprintf(d, " ..");
2029 bytes_read += 1;
2030 continue;
2031 }
2032 if (c == 0x7E) {
2033 return 0;
2034 } else {
2035 if (c == 0x55) {
2036 goto read;
2037 } else if (read_stop-- > 0) {
2038 goto read;
2039 } else {
2040 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2041 continue;
2042 }
2043 }
2044 } else if (packet_bytes > 1) {
2045 unsigned char s1 = ftdi->bulk_in_buffer[0];
2046 unsigned char s2 = ftdi->bulk_in_buffer[1];
2047 if (s1 == 0x31 && s2 == 0x00) {
2048 if (read_stuck-- > 0) {
2049 goto read;
2050 } else
2051 goto reset;
2052 } else if (s1 == 0x31 && s2 == 0x60) {
2053 if (read_stop-- > 0) {
2054 goto read;
2055 } else {
2056 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2057 continue;
2058 }
2059 } else {
2060 if (read_stop-- > 0) {
2061 goto read;
2062 } else {
2063 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2064 continue;
2065 }
2066 }
2067 } else if (packet_bytes > 0) {
2068 if (read_stop-- > 0) {
2069 goto read;
2070 } else {
2071 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2072 continue;
2073 }
2074 } else if (retval == -ETIMEDOUT) {
2075 if (retry_on_timeout-- > 0) {
2076 goto read;
2077 } else {
2078 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2079 continue;
2080 }
2081 } else if (retval == 0) {
2082 if (retry_on_empty-- > 0) {
2083 goto read;
2084 } else {
2085 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2086 continue;
2087 }
2088 } else {
2089 err_count += 1;
2090 dev_err(&ftdi->udev->dev, "error = %d\n",
2091 retval);
2092 if (read_stop-- > 0) {
2093 goto read;
2094 } else {
2095 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2096 continue;
2097 }
2098 }
2099 }
2100 }
2101 dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2102 return -EFAULT;
2103 }
2104
2105 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2106 {
2107 int retry_on_empty = 10;
2108 int retry_on_timeout = 5;
2109 int retry_on_status = 50;
2110 more:{
2111 int packet_bytes = 0;
2112 int retval = usb_bulk_msg(ftdi->udev,
2113 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2114 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2115 &packet_bytes, 1000);
2116 if (packet_bytes > 2) {
2117 char diag[30 *3 + 4];
2118 char *d = diag;
2119 int m = (sizeof(diag) - 1) / 3 - 1;
2120 char *b = ftdi->bulk_in_buffer;
2121 int bytes_read = 0;
2122 diag[0] = 0;
2123 while (packet_bytes-- > 0) {
2124 char c = *b++;
2125 if (bytes_read < m) {
2126 d += sprintf(d, " %02X",
2127 0x000000FF & c);
2128 } else if (bytes_read > m) {
2129 } else
2130 d += sprintf(d, " ..");
2131 bytes_read += 1;
2132 continue;
2133 }
2134 goto more;
2135 } else if (packet_bytes > 1) {
2136 char s1 = ftdi->bulk_in_buffer[0];
2137 char s2 = ftdi->bulk_in_buffer[1];
2138 if (s1 == 0x31 && s2 == 0x60) {
2139 return 0;
2140 } else if (retry_on_status-- > 0) {
2141 msleep(5);
2142 goto more;
2143 } else
2144 return -EFAULT;
2145 } else if (packet_bytes > 0) {
2146 char b1 = ftdi->bulk_in_buffer[0];
2147 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2148 if (retry_on_status-- > 0) {
2149 msleep(5);
2150 goto more;
2151 } else {
2152 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2153 return -EFAULT;
2154 }
2155 } else if (retval == -ETIMEDOUT) {
2156 if (retry_on_timeout-- > 0) {
2157 goto more;
2158 } else {
2159 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2160 return -ENOMEM;
2161 }
2162 } else if (retval == 0) {
2163 if (retry_on_empty-- > 0) {
2164 goto more;
2165 } else {
2166 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2167 return -ENOMEM;
2168 }
2169 } else {
2170 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2171 return -ENOMEM;
2172 }
2173 }
2174 return -1;
2175 }
2176
2177 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2178 {
2179 int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2180 if (UxxxStatus)
2181 return UxxxStatus;
2182 if (ftdi->controlreg & 0x00400000) {
2183 if (ftdi->card_ejected) {
2184 } else {
2185 ftdi->card_ejected = 1;
2186 dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2187 ftdi->controlreg);
2188 }
2189 return -ENODEV;
2190 } else {
2191 u8 fn = ftdi->function - 1;
2192 int activePCIfn = fn << 8;
2193 u32 pcidata;
2194 u32 pciVID;
2195 u32 pciPID;
2196 int reg = 0;
2197 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2198 &pcidata);
2199 if (UxxxStatus)
2200 return UxxxStatus;
2201 pciVID = pcidata & 0xFFFF;
2202 pciPID = (pcidata >> 16) & 0xFFFF;
2203 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2204 ftdi->platform_data.device) {
2205 return 0;
2206 } else {
2207 dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2208 ftdi->platform_data.vendor, pciVID,
2209 ftdi->platform_data.device, pciPID);
2210 return -ENODEV;
2211 }
2212 }
2213 }
2214
2215
2216 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2217 offsetof(struct ohci_regs, member), 0, data);
2218 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2219 offsetof(struct ohci_regs, member), 0, data);
2220
2221 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2222 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2223 OHCI_INTR_WDH)
2224 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2225 {
2226 int devices = 0;
2227 int retval;
2228 u32 hc_control;
2229 int num_ports;
2230 u32 control;
2231 u32 rh_a = -1;
2232 u32 status;
2233 u32 fminterval;
2234 u32 hc_fminterval;
2235 u32 periodicstart;
2236 u32 cmdstatus;
2237 u32 roothub_a;
2238 int mask = OHCI_INTR_INIT;
2239 int sleep_time = 0;
2240 int reset_timeout = 30; /* ... allow extra time */
2241 int temp;
2242 retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2243 if (retval)
2244 return retval;
2245 retval = ftdi_read_pcimem(ftdi, control, &control);
2246 if (retval)
2247 return retval;
2248 retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2249 if (retval)
2250 return retval;
2251 num_ports = rh_a & RH_A_NDP;
2252 retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2253 if (retval)
2254 return retval;
2255 hc_fminterval &= 0x3fff;
2256 if (hc_fminterval != FI) {
2257 }
2258 hc_fminterval |= FSMP(hc_fminterval) << 16;
2259 retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2260 if (retval)
2261 return retval;
2262 switch (hc_control & OHCI_CTRL_HCFS) {
2263 case OHCI_USB_OPER:
2264 sleep_time = 0;
2265 break;
2266 case OHCI_USB_SUSPEND:
2267 case OHCI_USB_RESUME:
2268 hc_control &= OHCI_CTRL_RWC;
2269 hc_control |= OHCI_USB_RESUME;
2270 sleep_time = 10;
2271 break;
2272 default:
2273 hc_control &= OHCI_CTRL_RWC;
2274 hc_control |= OHCI_USB_RESET;
2275 sleep_time = 50;
2276 break;
2277 }
2278 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2279 if (retval)
2280 return retval;
2281 retval = ftdi_read_pcimem(ftdi, control, &control);
2282 if (retval)
2283 return retval;
2284 msleep(sleep_time);
2285 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2286 if (retval)
2287 return retval;
2288 if (!(roothub_a & RH_A_NPS)) { /* power down each port */
2289 for (temp = 0; temp < num_ports; temp++) {
2290 retval = ftdi_write_pcimem(ftdi,
2291 roothub.portstatus[temp], RH_PS_LSDA);
2292 if (retval)
2293 return retval;
2294 }
2295 }
2296 retval = ftdi_read_pcimem(ftdi, control, &control);
2297 if (retval)
2298 return retval;
2299 retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2300 if (retval)
2301 return retval;
2302 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2303 if (retval)
2304 return retval;
2305 extra:{
2306 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2307 if (retval)
2308 return retval;
2309 if (0 != (status & OHCI_HCR)) {
2310 if (--reset_timeout == 0) {
2311 dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2312 return -ENODEV;
2313 } else {
2314 msleep(5);
2315 goto extra;
2316 }
2317 }
2318 }
2319 if (quirk & OHCI_QUIRK_INITRESET) {
2320 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2321 if (retval)
2322 return retval;
2323 retval = ftdi_read_pcimem(ftdi, control, &control);
2324 if (retval)
2325 return retval;
2326 }
2327 retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2328 if (retval)
2329 return retval;
2330 retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2331 if (retval)
2332 return retval;
2333 retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2334 if (retval)
2335 return retval;
2336 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2337 if (retval)
2338 return retval;
2339 retval = ftdi_write_pcimem(ftdi, fminterval,
2340 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2341 if (retval)
2342 return retval;
2343 retval = ftdi_write_pcimem(ftdi, periodicstart,
2344 ((9 *hc_fminterval) / 10) & 0x3fff);
2345 if (retval)
2346 return retval;
2347 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2348 if (retval)
2349 return retval;
2350 retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2351 if (retval)
2352 return retval;
2353 if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2354 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2355 quirk |= OHCI_QUIRK_INITRESET;
2356 goto retry;
2357 } else
2358 dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2359 fminterval, periodicstart);
2360 } /* start controller operations */
2361 hc_control &= OHCI_CTRL_RWC;
2362 hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2363 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2364 if (retval)
2365 return retval;
2366 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2367 if (retval)
2368 return retval;
2369 retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2370 if (retval)
2371 return retval;
2372 retval = ftdi_read_pcimem(ftdi, control, &control);
2373 if (retval)
2374 return retval;
2375 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2376 if (retval)
2377 return retval;
2378 retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2379 if (retval)
2380 return retval;
2381 retval = ftdi_write_pcimem(ftdi, intrdisable,
2382 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2383 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2384 OHCI_INTR_SO);
2385 if (retval)
2386 return retval; /* handle root hub init quirks ... */
2387 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2388 if (retval)
2389 return retval;
2390 roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2391 if (quirk & OHCI_QUIRK_SUPERIO) {
2392 roothub_a |= RH_A_NOCP;
2393 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2394 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2395 if (retval)
2396 return retval;
2397 } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2398 roothub_a |= RH_A_NPS;
2399 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2400 if (retval)
2401 return retval;
2402 }
2403 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2404 if (retval)
2405 return retval;
2406 retval = ftdi_write_pcimem(ftdi, roothub.b,
2407 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2408 if (retval)
2409 return retval;
2410 retval = ftdi_read_pcimem(ftdi, control, &control);
2411 if (retval)
2412 return retval;
2413 mdelay((roothub_a >> 23) & 0x1fe);
2414 for (temp = 0; temp < num_ports; temp++) {
2415 u32 portstatus;
2416 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2417 &portstatus);
2418 if (retval)
2419 return retval;
2420 if (1 & portstatus)
2421 devices += 1;
2422 }
2423 return devices;
2424 }
2425
2426 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2427 {
2428 u32 latence_timer;
2429 int UxxxStatus;
2430 u32 pcidata;
2431 int reg = 0;
2432 int activePCIfn = fn << 8;
2433 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2434 if (UxxxStatus)
2435 return UxxxStatus;
2436 reg = 16;
2437 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2438 0xFFFFFFFF);
2439 if (UxxxStatus)
2440 return UxxxStatus;
2441 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2442 &pcidata);
2443 if (UxxxStatus)
2444 return UxxxStatus;
2445 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2446 0xF0000000);
2447 if (UxxxStatus)
2448 return UxxxStatus;
2449 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2450 &pcidata);
2451 if (UxxxStatus)
2452 return UxxxStatus;
2453 reg = 12;
2454 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2455 &latence_timer);
2456 if (UxxxStatus)
2457 return UxxxStatus;
2458 latence_timer &= 0xFFFF00FF;
2459 latence_timer |= 0x00001600;
2460 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2461 latence_timer);
2462 if (UxxxStatus)
2463 return UxxxStatus;
2464 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2465 &pcidata);
2466 if (UxxxStatus)
2467 return UxxxStatus;
2468 reg = 4;
2469 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2470 0x06);
2471 if (UxxxStatus)
2472 return UxxxStatus;
2473 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2474 &pcidata);
2475 if (UxxxStatus)
2476 return UxxxStatus;
2477 for (reg = 0; reg <= 0x54; reg += 4) {
2478 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2479 if (UxxxStatus)
2480 return UxxxStatus;
2481 }
2482 return 0;
2483 }
2484
2485 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2486 {
2487 u32 latence_timer;
2488 int UxxxStatus;
2489 u32 pcidata;
2490 int reg = 0;
2491 int activePCIfn = fn << 8;
2492 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2493 if (UxxxStatus)
2494 return UxxxStatus;
2495 reg = 16;
2496 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2497 0xFFFFFFFF);
2498 if (UxxxStatus)
2499 return UxxxStatus;
2500 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2501 &pcidata);
2502 if (UxxxStatus)
2503 return UxxxStatus;
2504 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2505 0x00000000);
2506 if (UxxxStatus)
2507 return UxxxStatus;
2508 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2509 &pcidata);
2510 if (UxxxStatus)
2511 return UxxxStatus;
2512 reg = 12;
2513 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2514 &latence_timer);
2515 if (UxxxStatus)
2516 return UxxxStatus;
2517 latence_timer &= 0xFFFF00FF;
2518 latence_timer |= 0x00001600;
2519 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2520 latence_timer);
2521 if (UxxxStatus)
2522 return UxxxStatus;
2523 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2524 &pcidata);
2525 if (UxxxStatus)
2526 return UxxxStatus;
2527 reg = 4;
2528 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2529 0x00);
2530 if (UxxxStatus)
2531 return UxxxStatus;
2532 return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2533 }
2534
2535 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2536 {
2537 int result;
2538 int UxxxStatus;
2539 UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2540 if (UxxxStatus)
2541 return UxxxStatus;
2542 result = ftdi_elan_check_controller(ftdi, quirk);
2543 UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2544 if (UxxxStatus)
2545 return UxxxStatus;
2546 return result;
2547 }
2548
2549 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2550 {
2551 u32 controlreg;
2552 u8 sensebits;
2553 int UxxxStatus;
2554 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2555 if (UxxxStatus)
2556 return UxxxStatus;
2557 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2558 if (UxxxStatus)
2559 return UxxxStatus;
2560 msleep(750);
2561 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2562 if (UxxxStatus)
2563 return UxxxStatus;
2564 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2565 if (UxxxStatus)
2566 return UxxxStatus;
2567 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2568 if (UxxxStatus)
2569 return UxxxStatus;
2570 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2571 if (UxxxStatus)
2572 return UxxxStatus;
2573 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2574 if (UxxxStatus)
2575 return UxxxStatus;
2576 msleep(250);
2577 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2578 if (UxxxStatus)
2579 return UxxxStatus;
2580 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2581 if (UxxxStatus)
2582 return UxxxStatus;
2583 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2584 if (UxxxStatus)
2585 return UxxxStatus;
2586 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2587 if (UxxxStatus)
2588 return UxxxStatus;
2589 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2590 if (UxxxStatus)
2591 return UxxxStatus;
2592 msleep(1000);
2593 sensebits = (controlreg >> 16) & 0x000F;
2594 if (0x0D == sensebits)
2595 return 0;
2596 else
2597 return - ENXIO;
2598 }
2599
2600 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2601 {
2602 int UxxxStatus;
2603 u32 pcidata;
2604 int reg = 0;
2605 u8 fn;
2606 int activePCIfn = 0;
2607 int max_devices = 0;
2608 int controllers = 0;
2609 int unrecognized = 0;
2610 ftdi->function = 0;
2611 for (fn = 0; (fn < 4); fn++) {
2612 u32 pciVID = 0;
2613 u32 pciPID = 0;
2614 int devices = 0;
2615 activePCIfn = fn << 8;
2616 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2617 &pcidata);
2618 if (UxxxStatus)
2619 return UxxxStatus;
2620 pciVID = pcidata & 0xFFFF;
2621 pciPID = (pcidata >> 16) & 0xFFFF;
2622 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2623 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2624 controllers += 1;
2625 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2626 {
2627 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2628 controllers += 1;
2629 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2630 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2631 controllers += 1;
2632 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2633 {
2634 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2635 controllers += 1;
2636 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2637 devices = ftdi_elan_found_controller(ftdi, fn,
2638 OHCI_QUIRK_AMD756);
2639 controllers += 1;
2640 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2641 devices = ftdi_elan_found_controller(ftdi, fn,
2642 OHCI_QUIRK_ZFMICRO);
2643 controllers += 1;
2644 } else if (0 == pcidata) {
2645 } else
2646 unrecognized += 1;
2647 if (devices > max_devices) {
2648 max_devices = devices;
2649 ftdi->function = fn + 1;
2650 ftdi->platform_data.vendor = pciVID;
2651 ftdi->platform_data.device = pciPID;
2652 }
2653 }
2654 if (ftdi->function > 0) {
2655 return ftdi_elan_setup_controller(ftdi, ftdi->function - 1);
2656 } else if (controllers > 0) {
2657 return -ENXIO;
2658 } else if (unrecognized > 0) {
2659 return -ENXIO;
2660 } else {
2661 ftdi->enumerated = 0;
2662 return -ENXIO;
2663 }
2664 }
2665
2666
2667 /*
2668 * we use only the first bulk-in and bulk-out endpoints
2669 */
2670 static int ftdi_elan_probe(struct usb_interface *interface,
2671 const struct usb_device_id *id)
2672 {
2673 struct usb_host_interface *iface_desc;
2674 struct usb_endpoint_descriptor *bulk_in, *bulk_out;
2675 int retval;
2676 struct usb_ftdi *ftdi;
2677
2678 ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2679 if (!ftdi)
2680 return -ENOMEM;
2681
2682 mutex_lock(&ftdi_module_lock);
2683 list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2684 ftdi->sequence_num = ++ftdi_instances;
2685 mutex_unlock(&ftdi_module_lock);
2686 ftdi_elan_init_kref(ftdi);
2687 sema_init(&ftdi->sw_lock, 1);
2688 ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2689 ftdi->interface = interface;
2690 mutex_init(&ftdi->u132_lock);
2691 ftdi->expected = 4;
2692
2693 iface_desc = interface->cur_altsetting;
2694 retval = usb_find_common_endpoints(iface_desc,
2695 &bulk_in, &bulk_out, NULL, NULL);
2696 if (retval) {
2697 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2698 goto error;
2699 }
2700
2701 ftdi->bulk_in_size = usb_endpoint_maxp(bulk_in);
2702 ftdi->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
2703 ftdi->bulk_in_buffer = kmalloc(ftdi->bulk_in_size, GFP_KERNEL);
2704 if (!ftdi->bulk_in_buffer) {
2705 retval = -ENOMEM;
2706 goto error;
2707 }
2708
2709 ftdi->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
2710
2711 dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2712 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2713 ftdi->bulk_out_endpointAddr);
2714 usb_set_intfdata(interface, ftdi);
2715 if (iface_desc->desc.bInterfaceNumber == 0 &&
2716 ftdi->bulk_in_endpointAddr == 0x81 &&
2717 ftdi->bulk_out_endpointAddr == 0x02) {
2718 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2719 if (retval) {
2720 dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2721 usb_set_intfdata(interface, NULL);
2722 retval = -ENOMEM;
2723 goto error;
2724 } else {
2725 ftdi->class = &ftdi_elan_jtag_class;
2726 dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2727 ftdi, iface_desc->desc.bInterfaceNumber,
2728 interface->minor);
2729 return 0;
2730 }
2731 } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2732 ftdi->bulk_in_endpointAddr == 0x83 &&
2733 ftdi->bulk_out_endpointAddr == 0x04) {
2734 ftdi->class = NULL;
2735 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2736 ftdi, iface_desc->desc.bInterfaceNumber);
2737 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2738 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2739 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2740 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2741 return 0;
2742 } else {
2743 dev_err(&ftdi->udev->dev,
2744 "Could not find ELAN's U132 device\n");
2745 retval = -ENODEV;
2746 goto error;
2747 }
2748 error:if (ftdi) {
2749 ftdi_elan_put_kref(ftdi);
2750 }
2751 return retval;
2752 }
2753
2754 static void ftdi_elan_disconnect(struct usb_interface *interface)
2755 {
2756 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2757 ftdi->disconnected += 1;
2758 if (ftdi->class) {
2759 int minor = interface->minor;
2760 struct usb_class_driver *class = ftdi->class;
2761 usb_set_intfdata(interface, NULL);
2762 usb_deregister_dev(interface, class);
2763 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2764 minor);
2765 } else {
2766 ftdi_status_cancel_work(ftdi);
2767 ftdi_command_cancel_work(ftdi);
2768 ftdi_response_cancel_work(ftdi);
2769 ftdi_elan_abandon_completions(ftdi);
2770 ftdi_elan_abandon_targets(ftdi);
2771 if (ftdi->registered) {
2772 platform_device_unregister(&ftdi->platform_dev);
2773 ftdi->synchronized = 0;
2774 ftdi->enumerated = 0;
2775 ftdi->initialized = 0;
2776 ftdi->registered = 0;
2777 }
2778 ftdi->disconnected += 1;
2779 usb_set_intfdata(interface, NULL);
2780 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2781 }
2782 ftdi_elan_put_kref(ftdi);
2783 }
2784
2785 static struct usb_driver ftdi_elan_driver = {
2786 .name = "ftdi-elan",
2787 .probe = ftdi_elan_probe,
2788 .disconnect = ftdi_elan_disconnect,
2789 .id_table = ftdi_elan_table,
2790 };
2791 static int __init ftdi_elan_init(void)
2792 {
2793 int result;
2794 pr_info("driver %s\n", ftdi_elan_driver.name);
2795 mutex_init(&ftdi_module_lock);
2796 INIT_LIST_HEAD(&ftdi_static_list);
2797 result = usb_register(&ftdi_elan_driver);
2798 if (result) {
2799 pr_err("usb_register failed. Error number %d\n", result);
2800 }
2801 return result;
2802
2803 }
2804
2805 static void __exit ftdi_elan_exit(void)
2806 {
2807 struct usb_ftdi *ftdi;
2808 struct usb_ftdi *temp;
2809 usb_deregister(&ftdi_elan_driver);
2810 pr_info("ftdi_u132 driver deregistered\n");
2811 list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2812 ftdi_status_cancel_work(ftdi);
2813 ftdi_command_cancel_work(ftdi);
2814 ftdi_response_cancel_work(ftdi);
2815 }
2816 }
2817
2818
2819 module_init(ftdi_elan_init);
2820 module_exit(ftdi_elan_exit);
Linux with added FPC-III support