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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>
51MODULE_AUTHOR("Tony Olech");
52MODULE_DESCRIPTION("FTDI ELAN driver");
53MODULE_LICENSE("GPL");
54#define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
55static bool distrust_firmware = 1;
56module_param(distrust_firmware, bool, 0);
57MODULE_PARM_DESC(distrust_firmware,
58 "true to distrust firmware power/overcurrent setup");
59extern struct platform_driver u132_platform_driver;
60/*
61 * ftdi_module_lock exists to protect access to global variables
62 *
63 */
64static struct mutex ftdi_module_lock;
65static int ftdi_instances = 0;
66static 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*/
85static 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
90MODULE_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)
106struct 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)
118struct u132_respond {
119 u8 header;
120 u8 address;
121 u32 *value;
122 int *result;
123 struct completion wait_completion;
124};
125struct 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*/
144struct 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)
192static struct usb_driver ftdi_elan_driver;
193static 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
207static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
208{
209 kref_put(&ftdi->kref, ftdi_elan_delete);
210}
211
212static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
213{
214 kref_get(&ftdi->kref);
215}
216
217static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
218{
219 kref_init(&ftdi->kref);
220}
221
222static 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
228static 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
234static 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
240static 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
246static 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
252static 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
258static 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
265static 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
271static 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
277void 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
285EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
286static void ftdi_release_platform_dev(struct device *dev)
287{
288 dev->parent = NULL;
289}
290
291static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
292 struct u132_target *target, u8 *buffer, int length);
293static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
294static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
295static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
296static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
297static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
298static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
299static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
300static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
301static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
302static 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
327static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
328{
329 mutex_lock(&ftdi->u132_lock);
330 while (ftdi->respond_next > ftdi->respond_head) {
331 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
332 ftdi->respond_head++];
333 *respond->result = -ESHUTDOWN;
334 *respond->value = 0;
335 complete(&respond->wait_completion);
336 }
337 mutex_unlock(&ftdi->u132_lock);
338}
339
340static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
341{
342 int ed_number = 4;
343 mutex_lock(&ftdi->u132_lock);
344 while (ed_number-- > 0) {
345 struct u132_target *target = &ftdi->target[ed_number];
346 if (target->active == 1) {
347 target->condition_code = TD_DEVNOTRESP;
348 mutex_unlock(&ftdi->u132_lock);
349 ftdi_elan_do_callback(ftdi, target, NULL, 0);
350 mutex_lock(&ftdi->u132_lock);
351 }
352 }
353 ftdi->received = 0;
354 ftdi->expected = 4;
355 ftdi->ed_found = 0;
356 mutex_unlock(&ftdi->u132_lock);
357}
358
359static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
360{
361 int ed_number = 4;
362 mutex_lock(&ftdi->u132_lock);
363 while (ed_number-- > 0) {
364 struct u132_target *target = &ftdi->target[ed_number];
365 target->abandoning = 1;
366 wait_1:if (target->active == 1) {
367 int command_size = ftdi->command_next -
368 ftdi->command_head;
369 if (command_size < COMMAND_SIZE) {
370 struct u132_command *command = &ftdi->command[
371 COMMAND_MASK & ftdi->command_next];
372 command->header = 0x80 | (ed_number << 5) | 0x4;
373 command->length = 0x00;
374 command->address = 0x00;
375 command->width = 0x00;
376 command->follows = 0;
377 command->value = 0;
378 command->buffer = &command->value;
379 ftdi->command_next += 1;
380 ftdi_elan_kick_command_queue(ftdi);
381 } else {
382 mutex_unlock(&ftdi->u132_lock);
383 msleep(100);
384 mutex_lock(&ftdi->u132_lock);
385 goto wait_1;
386 }
387 }
388 wait_2:if (target->active == 1) {
389 int command_size = ftdi->command_next -
390 ftdi->command_head;
391 if (command_size < COMMAND_SIZE) {
392 struct u132_command *command = &ftdi->command[
393 COMMAND_MASK & ftdi->command_next];
394 command->header = 0x90 | (ed_number << 5);
395 command->length = 0x00;
396 command->address = 0x00;
397 command->width = 0x00;
398 command->follows = 0;
399 command->value = 0;
400 command->buffer = &command->value;
401 ftdi->command_next += 1;
402 ftdi_elan_kick_command_queue(ftdi);
403 } else {
404 mutex_unlock(&ftdi->u132_lock);
405 msleep(100);
406 mutex_lock(&ftdi->u132_lock);
407 goto wait_2;
408 }
409 }
410 }
411 ftdi->received = 0;
412 ftdi->expected = 4;
413 ftdi->ed_found = 0;
414 mutex_unlock(&ftdi->u132_lock);
415}
416
417static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
418{
419 int ed_number = 4;
420 mutex_lock(&ftdi->u132_lock);
421 while (ed_number-- > 0) {
422 struct u132_target *target = &ftdi->target[ed_number];
423 target->abandoning = 1;
424 wait:if (target->active == 1) {
425 int command_size = ftdi->command_next -
426 ftdi->command_head;
427 if (command_size < COMMAND_SIZE) {
428 struct u132_command *command = &ftdi->command[
429 COMMAND_MASK & ftdi->command_next];
430 command->header = 0x80 | (ed_number << 5) | 0x4;
431 command->length = 0x00;
432 command->address = 0x00;
433 command->width = 0x00;
434 command->follows = 0;
435 command->value = 0;
436 command->buffer = &command->value;
437 ftdi->command_next += 1;
438 ftdi_elan_kick_command_queue(ftdi);
439 } else {
440 mutex_unlock(&ftdi->u132_lock);
441 msleep(100);
442 mutex_lock(&ftdi->u132_lock);
443 goto wait;
444 }
445 }
446 }
447 ftdi->received = 0;
448 ftdi->expected = 4;
449 ftdi->ed_found = 0;
450 mutex_unlock(&ftdi->u132_lock);
451}
452
453static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
454{
455 ftdi_command_queue_work(ftdi, 0);
456}
457
458static void ftdi_elan_command_work(struct work_struct *work)
459{
460 struct usb_ftdi *ftdi =
461 container_of(work, struct usb_ftdi, command_work.work);
462
463 if (ftdi->disconnected > 0) {
464 ftdi_elan_put_kref(ftdi);
465 return;
466 } else {
467 int retval = ftdi_elan_command_engine(ftdi);
468 if (retval == -ESHUTDOWN) {
469 ftdi->disconnected += 1;
470 } else if (retval == -ENODEV) {
471 ftdi->disconnected += 1;
472 } else if (retval)
473 dev_err(&ftdi->udev->dev, "command error %d\n", retval);
474 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
475 return;
476 }
477}
478
479static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
480{
481 ftdi_respond_queue_work(ftdi, 0);
482}
483
484static void ftdi_elan_respond_work(struct work_struct *work)
485{
486 struct usb_ftdi *ftdi =
487 container_of(work, struct usb_ftdi, respond_work.work);
488 if (ftdi->disconnected > 0) {
489 ftdi_elan_put_kref(ftdi);
490 return;
491 } else {
492 int retval = ftdi_elan_respond_engine(ftdi);
493 if (retval == 0) {
494 } else if (retval == -ESHUTDOWN) {
495 ftdi->disconnected += 1;
496 } else if (retval == -ENODEV) {
497 ftdi->disconnected += 1;
498 } else if (retval == -EILSEQ) {
499 ftdi->disconnected += 1;
500 } else {
501 ftdi->disconnected += 1;
502 dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
503 }
504 if (ftdi->disconnected > 0) {
505 ftdi_elan_abandon_completions(ftdi);
506 ftdi_elan_abandon_targets(ftdi);
507 }
508 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
509 return;
510 }
511}
512
513
514/*
515 * the sw_lock is initially held and will be freed
516 * after the FTDI has been synchronized
517 *
518 */
519static void ftdi_elan_status_work(struct work_struct *work)
520{
521 struct usb_ftdi *ftdi =
522 container_of(work, struct usb_ftdi, status_work.work);
523 int work_delay_in_msec = 0;
524 if (ftdi->disconnected > 0) {
525 ftdi_elan_put_kref(ftdi);
526 return;
527 } else if (ftdi->synchronized == 0) {
528 down(&ftdi->sw_lock);
529 if (ftdi_elan_synchronize(ftdi) == 0) {
530 ftdi->synchronized = 1;
531 ftdi_command_queue_work(ftdi, 1);
532 ftdi_respond_queue_work(ftdi, 1);
533 up(&ftdi->sw_lock);
534 work_delay_in_msec = 100;
535 } else {
536 dev_err(&ftdi->udev->dev, "synchronize failed\n");
537 up(&ftdi->sw_lock);
538 work_delay_in_msec = 10 *1000;
539 }
540 } else if (ftdi->stuck_status > 0) {
541 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
542 ftdi->stuck_status = 0;
543 ftdi->synchronized = 0;
544 } else if ((ftdi->stuck_status++ % 60) == 1) {
545 dev_err(&ftdi->udev->dev, "WRONG type of card inserted - please remove\n");
546 } else
547 dev_err(&ftdi->udev->dev, "WRONG type of card inserted - checked %d times\n",
548 ftdi->stuck_status);
549 work_delay_in_msec = 100;
550 } else if (ftdi->enumerated == 0) {
551 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
552 ftdi->enumerated = 1;
553 work_delay_in_msec = 250;
554 } else
555 work_delay_in_msec = 1000;
556 } else if (ftdi->initialized == 0) {
557 if (ftdi_elan_setupOHCI(ftdi) == 0) {
558 ftdi->initialized = 1;
559 work_delay_in_msec = 500;
560 } else {
561 dev_err(&ftdi->udev->dev, "initialized failed - trying again in 10 seconds\n");
562 work_delay_in_msec = 1 *1000;
563 }
564 } else if (ftdi->registered == 0) {
565 work_delay_in_msec = 10;
566 if (ftdi_elan_hcd_init(ftdi) == 0) {
567 ftdi->registered = 1;
568 } else
569 dev_err(&ftdi->udev->dev, "register failed\n");
570 work_delay_in_msec = 250;
571 } else {
572 if (ftdi_elan_checkingPCI(ftdi) == 0) {
573 work_delay_in_msec = 250;
574 } else if (ftdi->controlreg & 0x00400000) {
575 if (ftdi->gone_away > 0) {
576 dev_err(&ftdi->udev->dev, "PCI device eject confirmed platform_dev.dev.parent=%p platform_dev.dev=%p\n",
577 ftdi->platform_dev.dev.parent,
578 &ftdi->platform_dev.dev);
579 platform_device_unregister(&ftdi->platform_dev);
580 ftdi->platform_dev.dev.parent = NULL;
581 ftdi->registered = 0;
582 ftdi->enumerated = 0;
583 ftdi->card_ejected = 0;
584 ftdi->initialized = 0;
585 ftdi->gone_away = 0;
586 } else
587 ftdi_elan_flush_targets(ftdi);
588 work_delay_in_msec = 250;
589 } else {
590 dev_err(&ftdi->udev->dev, "PCI device has disappeared\n");
591 ftdi_elan_cancel_targets(ftdi);
592 work_delay_in_msec = 500;
593 ftdi->enumerated = 0;
594 ftdi->initialized = 0;
595 }
596 }
597 if (ftdi->disconnected > 0) {
598 ftdi_elan_put_kref(ftdi);
599 return;
600 } else {
601 ftdi_status_requeue_work(ftdi,
602 msecs_to_jiffies(work_delay_in_msec));
603 return;
604 }
605}
606
607
608/*
609 * file_operations for the jtag interface
610 *
611 * the usage count for the device is incremented on open()
612 * and decremented on release()
613 */
614static int ftdi_elan_open(struct inode *inode, struct file *file)
615{
616 int subminor;
617 struct usb_interface *interface;
618
619 subminor = iminor(inode);
620 interface = usb_find_interface(&ftdi_elan_driver, subminor);
621
622 if (!interface) {
623 pr_err("can't find device for minor %d\n", subminor);
624 return -ENODEV;
625 } else {
626 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
627 if (!ftdi) {
628 return -ENODEV;
629 } else {
630 if (down_interruptible(&ftdi->sw_lock)) {
631 return -EINTR;
632 } else {
633 ftdi_elan_get_kref(ftdi);
634 file->private_data = ftdi;
635 return 0;
636 }
637 }
638 }
639}
640
641static int ftdi_elan_release(struct inode *inode, struct file *file)
642{
643 struct usb_ftdi *ftdi = file->private_data;
644 if (ftdi == NULL)
645 return -ENODEV;
646 up(&ftdi->sw_lock); /* decrement the count on our device */
647 ftdi_elan_put_kref(ftdi);
648 return 0;
649}
650
651
652/*
653 *
654 * blocking bulk reads are used to get data from the device
655 *
656 */
657static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
658 size_t count, loff_t *ppos)
659{
660 char data[30 *3 + 4];
661 char *d = data;
662 int m = (sizeof(data) - 1) / 3 - 1;
663 int bytes_read = 0;
664 int retry_on_empty = 10;
665 int retry_on_timeout = 5;
666 struct usb_ftdi *ftdi = file->private_data;
667 if (ftdi->disconnected > 0) {
668 return -ENODEV;
669 }
670 data[0] = 0;
671have:if (ftdi->bulk_in_left > 0) {
672 if (count-- > 0) {
673 char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
674 ftdi->bulk_in_left -= 1;
675 if (bytes_read < m) {
676 d += sprintf(d, " %02X", 0x000000FF & *p);
677 } else if (bytes_read > m) {
678 } else
679 d += sprintf(d, " ..");
680 if (copy_to_user(buffer++, p, 1)) {
681 return -EFAULT;
682 } else {
683 bytes_read += 1;
684 goto have;
685 }
686 } else
687 return bytes_read;
688 }
689more:if (count > 0) {
690 int packet_bytes = 0;
691 int retval = usb_bulk_msg(ftdi->udev,
692 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
693 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
694 &packet_bytes, 50);
695 if (packet_bytes > 2) {
696 ftdi->bulk_in_left = packet_bytes - 2;
697 ftdi->bulk_in_last = 1;
698 goto have;
699 } else if (retval == -ETIMEDOUT) {
700 if (retry_on_timeout-- > 0) {
701 goto more;
702 } else if (bytes_read > 0) {
703 return bytes_read;
704 } else
705 return retval;
706 } else if (retval == 0) {
707 if (retry_on_empty-- > 0) {
708 goto more;
709 } else
710 return bytes_read;
711 } else
712 return retval;
713 } else
714 return bytes_read;
715}
716
717static void ftdi_elan_write_bulk_callback(struct urb *urb)
718{
719 struct usb_ftdi *ftdi = urb->context;
720 int status = urb->status;
721
722 if (status && !(status == -ENOENT || status == -ECONNRESET ||
723 status == -ESHUTDOWN)) {
724 dev_err(&ftdi->udev->dev,
725 "urb=%p write bulk status received: %d\n", urb, status);
726 }
727 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
728 urb->transfer_buffer, urb->transfer_dma);
729}
730
731static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
732 char *buf, int command_size, int total_size)
733{
734 int ed_commands = 0;
735 int b = 0;
736 int I = command_size;
737 int i = ftdi->command_head;
738 while (I-- > 0) {
739 struct u132_command *command = &ftdi->command[COMMAND_MASK &
740 i++];
741 int F = command->follows;
742 u8 *f = command->buffer;
743 if (command->header & 0x80) {
744 ed_commands |= 1 << (0x3 & (command->header >> 5));
745 }
746 buf[b++] = command->header;
747 buf[b++] = (command->length >> 0) & 0x00FF;
748 buf[b++] = (command->length >> 8) & 0x00FF;
749 buf[b++] = command->address;
750 buf[b++] = command->width;
751 while (F-- > 0) {
752 buf[b++] = *f++;
753 }
754 }
755 return ed_commands;
756}
757
758static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
759{
760 int total_size = 0;
761 int I = command_size;
762 int i = ftdi->command_head;
763 while (I-- > 0) {
764 struct u132_command *command = &ftdi->command[COMMAND_MASK &
765 i++];
766 total_size += 5 + command->follows;
767 }
768 return total_size;
769}
770
771static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
772{
773 int retval;
774 char *buf;
775 int ed_commands;
776 int total_size;
777 struct urb *urb;
778 int command_size = ftdi->command_next - ftdi->command_head;
779 if (command_size == 0)
780 return 0;
781 total_size = ftdi_elan_total_command_size(ftdi, command_size);
782 urb = usb_alloc_urb(0, GFP_KERNEL);
783 if (!urb)
784 return -ENOMEM;
785 buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
786 &urb->transfer_dma);
787 if (!buf) {
788 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d commands totaling %d bytes to the Uxxx\n",
789 command_size, total_size);
790 usb_free_urb(urb);
791 return -ENOMEM;
792 }
793 ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
794 command_size, total_size);
795 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
796 ftdi->bulk_out_endpointAddr), buf, total_size,
797 ftdi_elan_write_bulk_callback, ftdi);
798 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
799 if (ed_commands) {
800 char diag[40 *3 + 4];
801 char *d = diag;
802 int m = total_size;
803 u8 *c = buf;
804 int s = (sizeof(diag) - 1) / 3;
805 diag[0] = 0;
806 while (s-- > 0 && m-- > 0) {
807 if (s > 0 || m == 0) {
808 d += sprintf(d, " %02X", *c++);
809 } else
810 d += sprintf(d, " ..");
811 }
812 }
813 retval = usb_submit_urb(urb, GFP_KERNEL);
814 if (retval) {
815 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write %d commands totaling %d bytes to the Uxxx\n",
816 retval, urb, command_size, total_size);
817 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
818 usb_free_urb(urb);
819 return retval;
820 }
821 usb_free_urb(urb); /* release our reference to this urb,
822 the USB core will eventually free it entirely */
823 ftdi->command_head += command_size;
824 ftdi_elan_kick_respond_queue(ftdi);
825 return 0;
826}
827
828static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
829 struct u132_target *target, u8 *buffer, int length)
830{
831 struct urb *urb = target->urb;
832 int halted = target->halted;
833 int skipped = target->skipped;
834 int actual = target->actual;
835 int non_null = target->non_null;
836 int toggle_bits = target->toggle_bits;
837 int error_count = target->error_count;
838 int condition_code = target->condition_code;
839 int repeat_number = target->repeat_number;
840 void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
841 int, int, int, int) = target->callback;
842 target->active -= 1;
843 target->callback = NULL;
844 (*callback) (target->endp, urb, buffer, length, toggle_bits,
845 error_count, condition_code, repeat_number, halted, skipped,
846 actual, non_null);
847}
848
849static char *have_ed_set_response(struct usb_ftdi *ftdi,
850 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
851 char *b)
852{
853 int payload = (ed_length >> 0) & 0x07FF;
854 mutex_lock(&ftdi->u132_lock);
855 target->actual = 0;
856 target->non_null = (ed_length >> 15) & 0x0001;
857 target->repeat_number = (ed_length >> 11) & 0x000F;
858 if (ed_type == 0x02 || ed_type == 0x03) {
859 if (payload == 0 || target->abandoning > 0) {
860 target->abandoning = 0;
861 mutex_unlock(&ftdi->u132_lock);
862 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
863 payload);
864 ftdi->received = 0;
865 ftdi->expected = 4;
866 ftdi->ed_found = 0;
867 return ftdi->response;
868 } else {
869 ftdi->expected = 4 + payload;
870 ftdi->ed_found = 1;
871 mutex_unlock(&ftdi->u132_lock);
872 return b;
873 }
874 } else {
875 target->abandoning = 0;
876 mutex_unlock(&ftdi->u132_lock);
877 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
878 payload);
879 ftdi->received = 0;
880 ftdi->expected = 4;
881 ftdi->ed_found = 0;
882 return ftdi->response;
883 }
884}
885
886static char *have_ed_get_response(struct usb_ftdi *ftdi,
887 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
888 char *b)
889{
890 mutex_lock(&ftdi->u132_lock);
891 target->condition_code = TD_DEVNOTRESP;
892 target->actual = (ed_length >> 0) & 0x01FF;
893 target->non_null = (ed_length >> 15) & 0x0001;
894 target->repeat_number = (ed_length >> 11) & 0x000F;
895 mutex_unlock(&ftdi->u132_lock);
896 if (target->active)
897 ftdi_elan_do_callback(ftdi, target, NULL, 0);
898 target->abandoning = 0;
899 ftdi->received = 0;
900 ftdi->expected = 4;
901 ftdi->ed_found = 0;
902 return ftdi->response;
903}
904
905
906/*
907 * The engine tries to empty the FTDI fifo
908 *
909 * all responses found in the fifo data are dispatched thus
910 * the response buffer can only ever hold a maximum sized
911 * response from the Uxxx.
912 *
913 */
914static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
915{
916 u8 *b = ftdi->response + ftdi->received;
917 int bytes_read = 0;
918 int retry_on_empty = 1;
919 int retry_on_timeout = 3;
920read:{
921 int packet_bytes = 0;
922 int retval = usb_bulk_msg(ftdi->udev,
923 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
924 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
925 &packet_bytes, 500);
926 char diag[30 *3 + 4];
927 char *d = diag;
928 int m = packet_bytes;
929 u8 *c = ftdi->bulk_in_buffer;
930 int s = (sizeof(diag) - 1) / 3;
931 diag[0] = 0;
932 while (s-- > 0 && m-- > 0) {
933 if (s > 0 || m == 0) {
934 d += sprintf(d, " %02X", *c++);
935 } else
936 d += sprintf(d, " ..");
937 }
938 if (packet_bytes > 2) {
939 ftdi->bulk_in_left = packet_bytes - 2;
940 ftdi->bulk_in_last = 1;
941 goto have;
942 } else if (retval == -ETIMEDOUT) {
943 if (retry_on_timeout-- > 0) {
944 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
945 packet_bytes, bytes_read, diag);
946 goto more;
947 } else if (bytes_read > 0) {
948 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
949 bytes_read, diag);
950 return -ENOMEM;
951 } else {
952 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
953 packet_bytes, bytes_read, diag);
954 return -ENOMEM;
955 }
956 } else if (retval == -EILSEQ) {
957 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
958 retval, packet_bytes, bytes_read, diag);
959 return retval;
960 } else if (retval) {
961 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
962 retval, packet_bytes, bytes_read, diag);
963 return retval;
964 } else {
965 if (retry_on_empty-- > 0) {
966 goto more;
967 } else
968 return 0;
969 }
970 }
971more:{
972 goto read;
973 }
974have:if (ftdi->bulk_in_left > 0) {
975 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
976 bytes_read += 1;
977 ftdi->bulk_in_left -= 1;
978 if (ftdi->received == 0 && c == 0xFF) {
979 goto have;
980 } else
981 *b++ = c;
982 if (++ftdi->received < ftdi->expected) {
983 goto have;
984 } else if (ftdi->ed_found) {
985 int ed_number = (ftdi->response[0] >> 5) & 0x03;
986 u16 ed_length = (ftdi->response[2] << 8) |
987 ftdi->response[1];
988 struct u132_target *target = &ftdi->target[ed_number];
989 int payload = (ed_length >> 0) & 0x07FF;
990 char diag[30 *3 + 4];
991 char *d = diag;
992 int m = payload;
993 u8 *c = 4 + ftdi->response;
994 int s = (sizeof(diag) - 1) / 3;
995 diag[0] = 0;
996 while (s-- > 0 && m-- > 0) {
997 if (s > 0 || m == 0) {
998 d += sprintf(d, " %02X", *c++);
999 } else
1000 d += sprintf(d, " ..");
1001 }
1002 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1003 payload);
1004 ftdi->received = 0;
1005 ftdi->expected = 4;
1006 ftdi->ed_found = 0;
1007 b = ftdi->response;
1008 goto have;
1009 } else if (ftdi->expected == 8) {
1010 u8 buscmd;
1011 int respond_head = ftdi->respond_head++;
1012 struct u132_respond *respond = &ftdi->respond[
1013 RESPOND_MASK & respond_head];
1014 u32 data = ftdi->response[7];
1015 data <<= 8;
1016 data |= ftdi->response[6];
1017 data <<= 8;
1018 data |= ftdi->response[5];
1019 data <<= 8;
1020 data |= ftdi->response[4];
1021 *respond->value = data;
1022 *respond->result = 0;
1023 complete(&respond->wait_completion);
1024 ftdi->received = 0;
1025 ftdi->expected = 4;
1026 ftdi->ed_found = 0;
1027 b = ftdi->response;
1028 buscmd = (ftdi->response[0] >> 0) & 0x0F;
1029 if (buscmd == 0x00) {
1030 } else if (buscmd == 0x02) {
1031 } else if (buscmd == 0x06) {
1032 } else if (buscmd == 0x0A) {
1033 } else
1034 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1035 buscmd, data);
1036 goto have;
1037 } else {
1038 if ((ftdi->response[0] & 0x80) == 0x00) {
1039 ftdi->expected = 8;
1040 goto have;
1041 } else {
1042 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1043 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1044 u16 ed_length = (ftdi->response[2] << 8) |
1045 ftdi->response[1];
1046 struct u132_target *target = &ftdi->target[
1047 ed_number];
1048 target->halted = (ftdi->response[0] >> 3) &
1049 0x01;
1050 target->skipped = (ftdi->response[0] >> 2) &
1051 0x01;
1052 target->toggle_bits = (ftdi->response[3] >> 6)
1053 & 0x03;
1054 target->error_count = (ftdi->response[3] >> 4)
1055 & 0x03;
1056 target->condition_code = (ftdi->response[
1057 3] >> 0) & 0x0F;
1058 if ((ftdi->response[0] & 0x10) == 0x00) {
1059 b = have_ed_set_response(ftdi, target,
1060 ed_length, ed_number, ed_type,
1061 b);
1062 goto have;
1063 } else {
1064 b = have_ed_get_response(ftdi, target,
1065 ed_length, ed_number, ed_type,
1066 b);
1067 goto have;
1068 }
1069 }
1070 }
1071 } else
1072 goto more;
1073}
1074
1075
1076/*
1077 * create a urb, and a buffer for it, and copy the data to the urb
1078 *
1079 */
1080static ssize_t ftdi_elan_write(struct file *file,
1081 const char __user *user_buffer, size_t count,
1082 loff_t *ppos)
1083{
1084 int retval = 0;
1085 struct urb *urb;
1086 char *buf;
1087 struct usb_ftdi *ftdi = file->private_data;
1088
1089 if (ftdi->disconnected > 0) {
1090 return -ENODEV;
1091 }
1092 if (count == 0) {
1093 goto exit;
1094 }
1095 urb = usb_alloc_urb(0, GFP_KERNEL);
1096 if (!urb) {
1097 retval = -ENOMEM;
1098 goto error_1;
1099 }
1100 buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1101 &urb->transfer_dma);
1102 if (!buf) {
1103 retval = -ENOMEM;
1104 goto error_2;
1105 }
1106 if (copy_from_user(buf, user_buffer, count)) {
1107 retval = -EFAULT;
1108 goto error_3;
1109 }
1110 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1111 ftdi->bulk_out_endpointAddr), buf, count,
1112 ftdi_elan_write_bulk_callback, ftdi);
1113 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1114 retval = usb_submit_urb(urb, GFP_KERNEL);
1115 if (retval) {
1116 dev_err(&ftdi->udev->dev,
1117 "failed submitting write urb, error %d\n", retval);
1118 goto error_3;
1119 }
1120 usb_free_urb(urb);
1121
1122exit:
1123 return count;
1124error_3:
1125 usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1126error_2:
1127 usb_free_urb(urb);
1128error_1:
1129 return retval;
1130}
1131
1132static const struct file_operations ftdi_elan_fops = {
1133 .owner = THIS_MODULE,
1134 .llseek = no_llseek,
1135 .read = ftdi_elan_read,
1136 .write = ftdi_elan_write,
1137 .open = ftdi_elan_open,
1138 .release = ftdi_elan_release,
1139};
1140
1141/*
1142 * usb class driver info in order to get a minor number from the usb core,
1143 * and to have the device registered with the driver core
1144 */
1145static struct usb_class_driver ftdi_elan_jtag_class = {
1146 .name = "ftdi-%d-jtag",
1147 .fops = &ftdi_elan_fops,
1148 .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1149};
1150
1151/*
1152 * the following definitions are for the
1153 * ELAN FPGA state machgine processor that
1154 * lies on the other side of the FTDI chip
1155 */
1156#define cPCIu132rd 0x0
1157#define cPCIu132wr 0x1
1158#define cPCIiord 0x2
1159#define cPCIiowr 0x3
1160#define cPCImemrd 0x6
1161#define cPCImemwr 0x7
1162#define cPCIcfgrd 0xA
1163#define cPCIcfgwr 0xB
1164#define cPCInull 0xF
1165#define cU132cmd_status 0x0
1166#define cU132flash 0x1
1167#define cPIDsetup 0x0
1168#define cPIDout 0x1
1169#define cPIDin 0x2
1170#define cPIDinonce 0x3
1171#define cCCnoerror 0x0
1172#define cCCcrc 0x1
1173#define cCCbitstuff 0x2
1174#define cCCtoggle 0x3
1175#define cCCstall 0x4
1176#define cCCnoresp 0x5
1177#define cCCbadpid1 0x6
1178#define cCCbadpid2 0x7
1179#define cCCdataoverrun 0x8
1180#define cCCdataunderrun 0x9
1181#define cCCbuffoverrun 0xC
1182#define cCCbuffunderrun 0xD
1183#define cCCnotaccessed 0xF
1184static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1185{
1186wait:if (ftdi->disconnected > 0) {
1187 return -ENODEV;
1188 } else {
1189 int command_size;
1190 mutex_lock(&ftdi->u132_lock);
1191 command_size = ftdi->command_next - ftdi->command_head;
1192 if (command_size < COMMAND_SIZE) {
1193 struct u132_command *command = &ftdi->command[
1194 COMMAND_MASK & ftdi->command_next];
1195 command->header = 0x00 | cPCIu132wr;
1196 command->length = 0x04;
1197 command->address = 0x00;
1198 command->width = 0x00;
1199 command->follows = 4;
1200 command->value = data;
1201 command->buffer = &command->value;
1202 ftdi->command_next += 1;
1203 ftdi_elan_kick_command_queue(ftdi);
1204 mutex_unlock(&ftdi->u132_lock);
1205 return 0;
1206 } else {
1207 mutex_unlock(&ftdi->u132_lock);
1208 msleep(100);
1209 goto wait;
1210 }
1211 }
1212}
1213
1214static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1215 u8 width, u32 data)
1216{
1217 u8 addressofs = config_offset / 4;
1218wait:if (ftdi->disconnected > 0) {
1219 return -ENODEV;
1220 } else {
1221 int command_size;
1222 mutex_lock(&ftdi->u132_lock);
1223 command_size = ftdi->command_next - ftdi->command_head;
1224 if (command_size < COMMAND_SIZE) {
1225 struct u132_command *command = &ftdi->command[
1226 COMMAND_MASK & ftdi->command_next];
1227 command->header = 0x00 | (cPCIcfgwr & 0x0F);
1228 command->length = 0x04;
1229 command->address = addressofs;
1230 command->width = 0x00 | (width & 0x0F);
1231 command->follows = 4;
1232 command->value = data;
1233 command->buffer = &command->value;
1234 ftdi->command_next += 1;
1235 ftdi_elan_kick_command_queue(ftdi);
1236 mutex_unlock(&ftdi->u132_lock);
1237 return 0;
1238 } else {
1239 mutex_unlock(&ftdi->u132_lock);
1240 msleep(100);
1241 goto wait;
1242 }
1243 }
1244}
1245
1246static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1247 u8 width, u32 data)
1248{
1249 u8 addressofs = mem_offset / 4;
1250wait:if (ftdi->disconnected > 0) {
1251 return -ENODEV;
1252 } else {
1253 int command_size;
1254 mutex_lock(&ftdi->u132_lock);
1255 command_size = ftdi->command_next - ftdi->command_head;
1256 if (command_size < COMMAND_SIZE) {
1257 struct u132_command *command = &ftdi->command[
1258 COMMAND_MASK & ftdi->command_next];
1259 command->header = 0x00 | (cPCImemwr & 0x0F);
1260 command->length = 0x04;
1261 command->address = addressofs;
1262 command->width = 0x00 | (width & 0x0F);
1263 command->follows = 4;
1264 command->value = data;
1265 command->buffer = &command->value;
1266 ftdi->command_next += 1;
1267 ftdi_elan_kick_command_queue(ftdi);
1268 mutex_unlock(&ftdi->u132_lock);
1269 return 0;
1270 } else {
1271 mutex_unlock(&ftdi->u132_lock);
1272 msleep(100);
1273 goto wait;
1274 }
1275 }
1276}
1277
1278int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1279 u8 width, u32 data)
1280{
1281 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1282 return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1283}
1284
1285
1286EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1287static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1288{
1289wait:if (ftdi->disconnected > 0) {
1290 return -ENODEV;
1291 } else {
1292 int command_size;
1293 int respond_size;
1294 mutex_lock(&ftdi->u132_lock);
1295 command_size = ftdi->command_next - ftdi->command_head;
1296 respond_size = ftdi->respond_next - ftdi->respond_head;
1297 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1298 {
1299 struct u132_command *command = &ftdi->command[
1300 COMMAND_MASK & ftdi->command_next];
1301 struct u132_respond *respond = &ftdi->respond[
1302 RESPOND_MASK & ftdi->respond_next];
1303 int result = -ENODEV;
1304 respond->result = &result;
1305 respond->header = command->header = 0x00 | cPCIu132rd;
1306 command->length = 0x04;
1307 respond->address = command->address = cU132cmd_status;
1308 command->width = 0x00;
1309 command->follows = 0;
1310 command->value = 0;
1311 command->buffer = NULL;
1312 respond->value = data;
1313 init_completion(&respond->wait_completion);
1314 ftdi->command_next += 1;
1315 ftdi->respond_next += 1;
1316 ftdi_elan_kick_command_queue(ftdi);
1317 mutex_unlock(&ftdi->u132_lock);
1318 wait_for_completion(&respond->wait_completion);
1319 return result;
1320 } else {
1321 mutex_unlock(&ftdi->u132_lock);
1322 msleep(100);
1323 goto wait;
1324 }
1325 }
1326}
1327
1328static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1329 u8 width, u32 *data)
1330{
1331 u8 addressofs = config_offset / 4;
1332wait:if (ftdi->disconnected > 0) {
1333 return -ENODEV;
1334 } else {
1335 int command_size;
1336 int respond_size;
1337 mutex_lock(&ftdi->u132_lock);
1338 command_size = ftdi->command_next - ftdi->command_head;
1339 respond_size = ftdi->respond_next - ftdi->respond_head;
1340 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1341 {
1342 struct u132_command *command = &ftdi->command[
1343 COMMAND_MASK & ftdi->command_next];
1344 struct u132_respond *respond = &ftdi->respond[
1345 RESPOND_MASK & ftdi->respond_next];
1346 int result = -ENODEV;
1347 respond->result = &result;
1348 respond->header = command->header = 0x00 | (cPCIcfgrd &
1349 0x0F);
1350 command->length = 0x04;
1351 respond->address = command->address = addressofs;
1352 command->width = 0x00 | (width & 0x0F);
1353 command->follows = 0;
1354 command->value = 0;
1355 command->buffer = NULL;
1356 respond->value = data;
1357 init_completion(&respond->wait_completion);
1358 ftdi->command_next += 1;
1359 ftdi->respond_next += 1;
1360 ftdi_elan_kick_command_queue(ftdi);
1361 mutex_unlock(&ftdi->u132_lock);
1362 wait_for_completion(&respond->wait_completion);
1363 return result;
1364 } else {
1365 mutex_unlock(&ftdi->u132_lock);
1366 msleep(100);
1367 goto wait;
1368 }
1369 }
1370}
1371
1372static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1373 u8 width, u32 *data)
1374{
1375 u8 addressofs = mem_offset / 4;
1376wait:if (ftdi->disconnected > 0) {
1377 return -ENODEV;
1378 } else {
1379 int command_size;
1380 int respond_size;
1381 mutex_lock(&ftdi->u132_lock);
1382 command_size = ftdi->command_next - ftdi->command_head;
1383 respond_size = ftdi->respond_next - ftdi->respond_head;
1384 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1385 {
1386 struct u132_command *command = &ftdi->command[
1387 COMMAND_MASK & ftdi->command_next];
1388 struct u132_respond *respond = &ftdi->respond[
1389 RESPOND_MASK & ftdi->respond_next];
1390 int result = -ENODEV;
1391 respond->result = &result;
1392 respond->header = command->header = 0x00 | (cPCImemrd &
1393 0x0F);
1394 command->length = 0x04;
1395 respond->address = command->address = addressofs;
1396 command->width = 0x00 | (width & 0x0F);
1397 command->follows = 0;
1398 command->value = 0;
1399 command->buffer = NULL;
1400 respond->value = data;
1401 init_completion(&respond->wait_completion);
1402 ftdi->command_next += 1;
1403 ftdi->respond_next += 1;
1404 ftdi_elan_kick_command_queue(ftdi);
1405 mutex_unlock(&ftdi->u132_lock);
1406 wait_for_completion(&respond->wait_completion);
1407 return result;
1408 } else {
1409 mutex_unlock(&ftdi->u132_lock);
1410 msleep(100);
1411 goto wait;
1412 }
1413 }
1414}
1415
1416int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1417 u8 width, u32 *data)
1418{
1419 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1420 if (ftdi->initialized == 0) {
1421 return -ENODEV;
1422 } else
1423 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1424}
1425
1426
1427EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1428static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1429 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1430 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1431 int toggle_bits, int error_count, int condition_code, int repeat_number,
1432 int halted, int skipped, int actual, int non_null))
1433{
1434 u8 ed = ed_number - 1;
1435wait:if (ftdi->disconnected > 0) {
1436 return -ENODEV;
1437 } else if (ftdi->initialized == 0) {
1438 return -ENODEV;
1439 } else {
1440 int command_size;
1441 mutex_lock(&ftdi->u132_lock);
1442 command_size = ftdi->command_next - ftdi->command_head;
1443 if (command_size < COMMAND_SIZE) {
1444 struct u132_target *target = &ftdi->target[ed];
1445 struct u132_command *command = &ftdi->command[
1446 COMMAND_MASK & ftdi->command_next];
1447 command->header = 0x80 | (ed << 5);
1448 command->length = 0x8007;
1449 command->address = (toggle_bits << 6) | (ep_number << 2)
1450 | (address << 0);
1451 command->width = usb_maxpacket(urb->dev, urb->pipe,
1452 usb_pipeout(urb->pipe));
1453 command->follows = 8;
1454 command->value = 0;
1455 command->buffer = urb->setup_packet;
1456 target->callback = callback;
1457 target->endp = endp;
1458 target->urb = urb;
1459 target->active = 1;
1460 ftdi->command_next += 1;
1461 ftdi_elan_kick_command_queue(ftdi);
1462 mutex_unlock(&ftdi->u132_lock);
1463 return 0;
1464 } else {
1465 mutex_unlock(&ftdi->u132_lock);
1466 msleep(100);
1467 goto wait;
1468 }
1469 }
1470}
1471
1472int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1473 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1474 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1475 int toggle_bits, int error_count, int condition_code, int repeat_number,
1476 int halted, int skipped, int actual, int non_null))
1477{
1478 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1479 return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1480 ep_number, toggle_bits, callback);
1481}
1482
1483
1484EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1485static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1486 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1487 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1488 int toggle_bits, int error_count, int condition_code, int repeat_number,
1489 int halted, int skipped, int actual, int non_null))
1490{
1491 u8 ed = ed_number - 1;
1492wait:if (ftdi->disconnected > 0) {
1493 return -ENODEV;
1494 } else if (ftdi->initialized == 0) {
1495 return -ENODEV;
1496 } else {
1497 int command_size;
1498 mutex_lock(&ftdi->u132_lock);
1499 command_size = ftdi->command_next - ftdi->command_head;
1500 if (command_size < COMMAND_SIZE) {
1501 struct u132_target *target = &ftdi->target[ed];
1502 struct u132_command *command = &ftdi->command[
1503 COMMAND_MASK & ftdi->command_next];
1504 u32 remaining_length = urb->transfer_buffer_length -
1505 urb->actual_length;
1506 command->header = 0x82 | (ed << 5);
1507 if (remaining_length == 0) {
1508 command->length = 0x0000;
1509 } else if (remaining_length > 1024) {
1510 command->length = 0x8000 | 1023;
1511 } else
1512 command->length = 0x8000 | (remaining_length -
1513 1);
1514 command->address = (toggle_bits << 6) | (ep_number << 2)
1515 | (address << 0);
1516 command->width = usb_maxpacket(urb->dev, urb->pipe,
1517 usb_pipeout(urb->pipe));
1518 command->follows = 0;
1519 command->value = 0;
1520 command->buffer = NULL;
1521 target->callback = callback;
1522 target->endp = endp;
1523 target->urb = urb;
1524 target->active = 1;
1525 ftdi->command_next += 1;
1526 ftdi_elan_kick_command_queue(ftdi);
1527 mutex_unlock(&ftdi->u132_lock);
1528 return 0;
1529 } else {
1530 mutex_unlock(&ftdi->u132_lock);
1531 msleep(100);
1532 goto wait;
1533 }
1534 }
1535}
1536
1537int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1538 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1539 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1540 int toggle_bits, int error_count, int condition_code, int repeat_number,
1541 int halted, int skipped, int actual, int non_null))
1542{
1543 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1544 return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1545 ep_number, toggle_bits, callback);
1546}
1547
1548
1549EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1550static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1551 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1552 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1553 int toggle_bits, int error_count, int condition_code, int repeat_number,
1554 int halted, int skipped, int actual, int non_null))
1555{
1556 u8 ed = ed_number - 1;
1557wait:if (ftdi->disconnected > 0) {
1558 return -ENODEV;
1559 } else if (ftdi->initialized == 0) {
1560 return -ENODEV;
1561 } else {
1562 int command_size;
1563 mutex_lock(&ftdi->u132_lock);
1564 command_size = ftdi->command_next - ftdi->command_head;
1565 if (command_size < COMMAND_SIZE) {
1566 struct u132_target *target = &ftdi->target[ed];
1567 struct u132_command *command = &ftdi->command[
1568 COMMAND_MASK & ftdi->command_next];
1569 command->header = 0x81 | (ed << 5);
1570 command->length = 0x0000;
1571 command->address = (toggle_bits << 6) | (ep_number << 2)
1572 | (address << 0);
1573 command->width = usb_maxpacket(urb->dev, urb->pipe,
1574 usb_pipeout(urb->pipe));
1575 command->follows = 0;
1576 command->value = 0;
1577 command->buffer = NULL;
1578 target->callback = callback;
1579 target->endp = endp;
1580 target->urb = urb;
1581 target->active = 1;
1582 ftdi->command_next += 1;
1583 ftdi_elan_kick_command_queue(ftdi);
1584 mutex_unlock(&ftdi->u132_lock);
1585 return 0;
1586 } else {
1587 mutex_unlock(&ftdi->u132_lock);
1588 msleep(100);
1589 goto wait;
1590 }
1591 }
1592}
1593
1594int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1595 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1596 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1597 int toggle_bits, int error_count, int condition_code, int repeat_number,
1598 int halted, int skipped, int actual, int non_null))
1599{
1600 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1601 return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1602 ep_number, toggle_bits, callback);
1603}
1604
1605
1606EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1607static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1608 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1609 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1610 int toggle_bits, int error_count, int condition_code, int repeat_number,
1611 int halted, int skipped, int actual, int non_null))
1612{
1613 u8 ed = ed_number - 1;
1614wait:if (ftdi->disconnected > 0) {
1615 return -ENODEV;
1616 } else if (ftdi->initialized == 0) {
1617 return -ENODEV;
1618 } else {
1619 int command_size;
1620 mutex_lock(&ftdi->u132_lock);
1621 command_size = ftdi->command_next - ftdi->command_head;
1622 if (command_size < COMMAND_SIZE) {
1623 u8 *b;
1624 u16 urb_size;
1625 int i = 0;
1626 char data[30 *3 + 4];
1627 char *d = data;
1628 int m = (sizeof(data) - 1) / 3 - 1;
1629 int l = 0;
1630 struct u132_target *target = &ftdi->target[ed];
1631 struct u132_command *command = &ftdi->command[
1632 COMMAND_MASK & ftdi->command_next];
1633 command->header = 0x81 | (ed << 5);
1634 command->address = (toggle_bits << 6) | (ep_number << 2)
1635 | (address << 0);
1636 command->width = usb_maxpacket(urb->dev, urb->pipe,
1637 usb_pipeout(urb->pipe));
1638 command->follows = min_t(u32, 1024,
1639 urb->transfer_buffer_length -
1640 urb->actual_length);
1641 command->value = 0;
1642 command->buffer = urb->transfer_buffer +
1643 urb->actual_length;
1644 command->length = 0x8000 | (command->follows - 1);
1645 b = command->buffer;
1646 urb_size = command->follows;
1647 data[0] = 0;
1648 while (urb_size-- > 0) {
1649 if (i > m) {
1650 } else if (i++ < m) {
1651 int w = sprintf(d, " %02X", *b++);
1652 d += w;
1653 l += w;
1654 } else
1655 d += sprintf(d, " ..");
1656 }
1657 target->callback = callback;
1658 target->endp = endp;
1659 target->urb = urb;
1660 target->active = 1;
1661 ftdi->command_next += 1;
1662 ftdi_elan_kick_command_queue(ftdi);
1663 mutex_unlock(&ftdi->u132_lock);
1664 return 0;
1665 } else {
1666 mutex_unlock(&ftdi->u132_lock);
1667 msleep(100);
1668 goto wait;
1669 }
1670 }
1671}
1672
1673int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1674 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1675 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1676 int toggle_bits, int error_count, int condition_code, int repeat_number,
1677 int halted, int skipped, int actual, int non_null))
1678{
1679 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1680 return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1681 ep_number, toggle_bits, callback);
1682}
1683
1684
1685EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1686static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1687 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1688 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1689 int toggle_bits, int error_count, int condition_code, int repeat_number,
1690 int halted, int skipped, int actual, int non_null))
1691{
1692 u8 ed = ed_number - 1;
1693wait:if (ftdi->disconnected > 0) {
1694 return -ENODEV;
1695 } else if (ftdi->initialized == 0) {
1696 return -ENODEV;
1697 } else {
1698 int command_size;
1699 mutex_lock(&ftdi->u132_lock);
1700 command_size = ftdi->command_next - ftdi->command_head;
1701 if (command_size < COMMAND_SIZE) {
1702 u32 remaining_length = urb->transfer_buffer_length -
1703 urb->actual_length;
1704 struct u132_target *target = &ftdi->target[ed];
1705 struct u132_command *command = &ftdi->command[
1706 COMMAND_MASK & ftdi->command_next];
1707 command->header = 0x83 | (ed << 5);
1708 if (remaining_length == 0) {
1709 command->length = 0x0000;
1710 } else if (remaining_length > 1024) {
1711 command->length = 0x8000 | 1023;
1712 } else
1713 command->length = 0x8000 | (remaining_length -
1714 1);
1715 command->address = (toggle_bits << 6) | (ep_number << 2)
1716 | (address << 0);
1717 command->width = usb_maxpacket(urb->dev, urb->pipe,
1718 usb_pipeout(urb->pipe));
1719 command->follows = 0;
1720 command->value = 0;
1721 command->buffer = NULL;
1722 target->callback = callback;
1723 target->endp = endp;
1724 target->urb = urb;
1725 target->active = 1;
1726 ftdi->command_next += 1;
1727 ftdi_elan_kick_command_queue(ftdi);
1728 mutex_unlock(&ftdi->u132_lock);
1729 return 0;
1730 } else {
1731 mutex_unlock(&ftdi->u132_lock);
1732 msleep(100);
1733 goto wait;
1734 }
1735 }
1736}
1737
1738int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1739 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1740 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1741 int toggle_bits, int error_count, int condition_code, int repeat_number,
1742 int halted, int skipped, int actual, int non_null))
1743{
1744 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1745 return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1746 ep_number, toggle_bits, callback);
1747}
1748
1749
1750EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1751static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1752 void *endp)
1753{
1754 u8 ed = ed_number - 1;
1755 if (ftdi->disconnected > 0) {
1756 return -ENODEV;
1757 } else if (ftdi->initialized == 0) {
1758 return -ENODEV;
1759 } else {
1760 struct u132_target *target = &ftdi->target[ed];
1761 mutex_lock(&ftdi->u132_lock);
1762 if (target->abandoning > 0) {
1763 mutex_unlock(&ftdi->u132_lock);
1764 return 0;
1765 } else {
1766 target->abandoning = 1;
1767 wait_1:if (target->active == 1) {
1768 int command_size = ftdi->command_next -
1769 ftdi->command_head;
1770 if (command_size < COMMAND_SIZE) {
1771 struct u132_command *command =
1772 &ftdi->command[COMMAND_MASK &
1773 ftdi->command_next];
1774 command->header = 0x80 | (ed << 5) |
1775 0x4;
1776 command->length = 0x00;
1777 command->address = 0x00;
1778 command->width = 0x00;
1779 command->follows = 0;
1780 command->value = 0;
1781 command->buffer = &command->value;
1782 ftdi->command_next += 1;
1783 ftdi_elan_kick_command_queue(ftdi);
1784 } else {
1785 mutex_unlock(&ftdi->u132_lock);
1786 msleep(100);
1787 mutex_lock(&ftdi->u132_lock);
1788 goto wait_1;
1789 }
1790 }
1791 mutex_unlock(&ftdi->u132_lock);
1792 return 0;
1793 }
1794 }
1795}
1796
1797int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1798 void *endp)
1799{
1800 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1801 return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1802}
1803
1804
1805EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1806static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1807{
1808 int retry_on_empty = 10;
1809 int retry_on_timeout = 5;
1810 int retry_on_status = 20;
1811more:{
1812 int packet_bytes = 0;
1813 int retval = usb_bulk_msg(ftdi->udev,
1814 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1815 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1816 &packet_bytes, 100);
1817 if (packet_bytes > 2) {
1818 char diag[30 *3 + 4];
1819 char *d = diag;
1820 int m = (sizeof(diag) - 1) / 3 - 1;
1821 char *b = ftdi->bulk_in_buffer;
1822 int bytes_read = 0;
1823 diag[0] = 0;
1824 while (packet_bytes-- > 0) {
1825 char c = *b++;
1826 if (bytes_read < m) {
1827 d += sprintf(d, " %02X",
1828 0x000000FF & c);
1829 } else if (bytes_read > m) {
1830 } else
1831 d += sprintf(d, " ..");
1832 bytes_read += 1;
1833 continue;
1834 }
1835 goto more;
1836 } else if (packet_bytes > 1) {
1837 char s1 = ftdi->bulk_in_buffer[0];
1838 char s2 = ftdi->bulk_in_buffer[1];
1839 if (s1 == 0x31 && s2 == 0x60) {
1840 return 0;
1841 } else if (retry_on_status-- > 0) {
1842 goto more;
1843 } else {
1844 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1845 return -EFAULT;
1846 }
1847 } else if (packet_bytes > 0) {
1848 char b1 = ftdi->bulk_in_buffer[0];
1849 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1850 b1);
1851 if (retry_on_status-- > 0) {
1852 goto more;
1853 } else {
1854 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1855 return -EFAULT;
1856 }
1857 } else if (retval == -ETIMEDOUT) {
1858 if (retry_on_timeout-- > 0) {
1859 goto more;
1860 } else {
1861 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1862 return -ENOMEM;
1863 }
1864 } else if (retval == 0) {
1865 if (retry_on_empty-- > 0) {
1866 goto more;
1867 } else {
1868 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1869 return -ENOMEM;
1870 }
1871 } else {
1872 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1873 return retval;
1874 }
1875 }
1876 return -1;
1877}
1878
1879
1880/*
1881 * send the long flush sequence
1882 *
1883 */
1884static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1885{
1886 int retval;
1887 struct urb *urb;
1888 char *buf;
1889 int I = 257;
1890 int i = 0;
1891 urb = usb_alloc_urb(0, GFP_KERNEL);
1892 if (!urb)
1893 return -ENOMEM;
1894 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1895 if (!buf) {
1896 dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1897 usb_free_urb(urb);
1898 return -ENOMEM;
1899 }
1900 while (I-- > 0)
1901 buf[i++] = 0x55;
1902 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1903 ftdi->bulk_out_endpointAddr), buf, i,
1904 ftdi_elan_write_bulk_callback, ftdi);
1905 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1906 retval = usb_submit_urb(urb, GFP_KERNEL);
1907 if (retval) {
1908 dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1909 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1910 usb_free_urb(urb);
1911 return -ENOMEM;
1912 }
1913 usb_free_urb(urb);
1914 return 0;
1915}
1916
1917
1918/*
1919 * send the reset sequence
1920 *
1921 */
1922static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1923{
1924 int retval;
1925 struct urb *urb;
1926 char *buf;
1927 int I = 4;
1928 int i = 0;
1929 urb = usb_alloc_urb(0, GFP_KERNEL);
1930 if (!urb)
1931 return -ENOMEM;
1932 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1933 if (!buf) {
1934 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1935 usb_free_urb(urb);
1936 return -ENOMEM;
1937 }
1938 buf[i++] = 0x55;
1939 buf[i++] = 0xAA;
1940 buf[i++] = 0x5A;
1941 buf[i++] = 0xA5;
1942 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1943 ftdi->bulk_out_endpointAddr), buf, i,
1944 ftdi_elan_write_bulk_callback, ftdi);
1945 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1946 retval = usb_submit_urb(urb, GFP_KERNEL);
1947 if (retval) {
1948 dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
1949 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1950 usb_free_urb(urb);
1951 return -ENOMEM;
1952 }
1953 usb_free_urb(urb);
1954 return 0;
1955}
1956
1957static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
1958{
1959 int retval;
1960 int long_stop = 10;
1961 int retry_on_timeout = 5;
1962 int retry_on_empty = 10;
1963 int err_count = 0;
1964 retval = ftdi_elan_flush_input_fifo(ftdi);
1965 if (retval)
1966 return retval;
1967 ftdi->bulk_in_left = 0;
1968 ftdi->bulk_in_last = -1;
1969 while (long_stop-- > 0) {
1970 int read_stop;
1971 int read_stuck;
1972 retval = ftdi_elan_synchronize_flush(ftdi);
1973 if (retval)
1974 return retval;
1975 retval = ftdi_elan_flush_input_fifo(ftdi);
1976 if (retval)
1977 return retval;
1978 reset:retval = ftdi_elan_synchronize_reset(ftdi);
1979 if (retval)
1980 return retval;
1981 read_stop = 100;
1982 read_stuck = 10;
1983 read:{
1984 int packet_bytes = 0;
1985 retval = usb_bulk_msg(ftdi->udev,
1986 usb_rcvbulkpipe(ftdi->udev,
1987 ftdi->bulk_in_endpointAddr),
1988 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1989 &packet_bytes, 500);
1990 if (packet_bytes > 2) {
1991 char diag[30 *3 + 4];
1992 char *d = diag;
1993 int m = (sizeof(diag) - 1) / 3 - 1;
1994 char *b = ftdi->bulk_in_buffer;
1995 int bytes_read = 0;
1996 unsigned char c = 0;
1997 diag[0] = 0;
1998 while (packet_bytes-- > 0) {
1999 c = *b++;
2000 if (bytes_read < m) {
2001 d += sprintf(d, " %02X", c);
2002 } else if (bytes_read > m) {
2003 } else
2004 d += sprintf(d, " ..");
2005 bytes_read += 1;
2006 continue;
2007 }
2008 if (c == 0x7E) {
2009 return 0;
2010 } else {
2011 if (c == 0x55) {
2012 goto read;
2013 } else if (read_stop-- > 0) {
2014 goto read;
2015 } else {
2016 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2017 continue;
2018 }
2019 }
2020 } else if (packet_bytes > 1) {
2021 unsigned char s1 = ftdi->bulk_in_buffer[0];
2022 unsigned char s2 = ftdi->bulk_in_buffer[1];
2023 if (s1 == 0x31 && s2 == 0x00) {
2024 if (read_stuck-- > 0) {
2025 goto read;
2026 } else
2027 goto reset;
2028 } else {
2029 if (read_stop-- > 0) {
2030 goto read;
2031 } else {
2032 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2033 continue;
2034 }
2035 }
2036 } else if (packet_bytes > 0) {
2037 if (read_stop-- > 0) {
2038 goto read;
2039 } else {
2040 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2041 continue;
2042 }
2043 } else if (retval == -ETIMEDOUT) {
2044 if (retry_on_timeout-- > 0) {
2045 goto read;
2046 } else {
2047 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2048 continue;
2049 }
2050 } else if (retval == 0) {
2051 if (retry_on_empty-- > 0) {
2052 goto read;
2053 } else {
2054 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2055 continue;
2056 }
2057 } else {
2058 err_count += 1;
2059 dev_err(&ftdi->udev->dev, "error = %d\n",
2060 retval);
2061 if (read_stop-- > 0) {
2062 goto read;
2063 } else {
2064 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2065 continue;
2066 }
2067 }
2068 }
2069 }
2070 dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2071 return -EFAULT;
2072}
2073
2074static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2075{
2076 int retry_on_empty = 10;
2077 int retry_on_timeout = 5;
2078 int retry_on_status = 50;
2079more:{
2080 int packet_bytes = 0;
2081 int retval = usb_bulk_msg(ftdi->udev,
2082 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2083 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2084 &packet_bytes, 1000);
2085 if (packet_bytes > 2) {
2086 char diag[30 *3 + 4];
2087 char *d = diag;
2088 int m = (sizeof(diag) - 1) / 3 - 1;
2089 char *b = ftdi->bulk_in_buffer;
2090 int bytes_read = 0;
2091 diag[0] = 0;
2092 while (packet_bytes-- > 0) {
2093 char c = *b++;
2094 if (bytes_read < m) {
2095 d += sprintf(d, " %02X",
2096 0x000000FF & c);
2097 } else if (bytes_read > m) {
2098 } else
2099 d += sprintf(d, " ..");
2100 bytes_read += 1;
2101 continue;
2102 }
2103 goto more;
2104 } else if (packet_bytes > 1) {
2105 char s1 = ftdi->bulk_in_buffer[0];
2106 char s2 = ftdi->bulk_in_buffer[1];
2107 if (s1 == 0x31 && s2 == 0x60) {
2108 return 0;
2109 } else if (retry_on_status-- > 0) {
2110 msleep(5);
2111 goto more;
2112 } else
2113 return -EFAULT;
2114 } else if (packet_bytes > 0) {
2115 char b1 = ftdi->bulk_in_buffer[0];
2116 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2117 if (retry_on_status-- > 0) {
2118 msleep(5);
2119 goto more;
2120 } else {
2121 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2122 return -EFAULT;
2123 }
2124 } else if (retval == -ETIMEDOUT) {
2125 if (retry_on_timeout-- > 0) {
2126 goto more;
2127 } else {
2128 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2129 return -ENOMEM;
2130 }
2131 } else if (retval == 0) {
2132 if (retry_on_empty-- > 0) {
2133 goto more;
2134 } else {
2135 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2136 return -ENOMEM;
2137 }
2138 } else {
2139 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2140 return -ENOMEM;
2141 }
2142 }
2143 return -1;
2144}
2145
2146static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2147{
2148 int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2149 if (UxxxStatus)
2150 return UxxxStatus;
2151 if (ftdi->controlreg & 0x00400000) {
2152 if (ftdi->card_ejected) {
2153 } else {
2154 ftdi->card_ejected = 1;
2155 dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2156 ftdi->controlreg);
2157 }
2158 return -ENODEV;
2159 } else {
2160 u8 fn = ftdi->function - 1;
2161 int activePCIfn = fn << 8;
2162 u32 pcidata;
2163 u32 pciVID;
2164 u32 pciPID;
2165 int reg = 0;
2166 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2167 &pcidata);
2168 if (UxxxStatus)
2169 return UxxxStatus;
2170 pciVID = pcidata & 0xFFFF;
2171 pciPID = (pcidata >> 16) & 0xFFFF;
2172 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2173 ftdi->platform_data.device) {
2174 return 0;
2175 } else {
2176 dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2177 ftdi->platform_data.vendor, pciVID,
2178 ftdi->platform_data.device, pciPID);
2179 return -ENODEV;
2180 }
2181 }
2182}
2183
2184
2185#define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2186 offsetof(struct ohci_regs, member), 0, data);
2187#define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2188 offsetof(struct ohci_regs, member), 0, data);
2189
2190#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2191#define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2192 OHCI_INTR_WDH)
2193static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2194{
2195 int devices = 0;
2196 int retval;
2197 u32 hc_control;
2198 int num_ports;
2199 u32 control;
2200 u32 rh_a = -1;
2201 u32 status;
2202 u32 fminterval;
2203 u32 hc_fminterval;
2204 u32 periodicstart;
2205 u32 cmdstatus;
2206 u32 roothub_a;
2207 int mask = OHCI_INTR_INIT;
2208 int sleep_time = 0;
2209 int reset_timeout = 30; /* ... allow extra time */
2210 int temp;
2211 retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2212 if (retval)
2213 return retval;
2214 retval = ftdi_read_pcimem(ftdi, control, &control);
2215 if (retval)
2216 return retval;
2217 retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2218 if (retval)
2219 return retval;
2220 num_ports = rh_a & RH_A_NDP;
2221 retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2222 if (retval)
2223 return retval;
2224 hc_fminterval &= 0x3fff;
2225 if (hc_fminterval != FI) {
2226 }
2227 hc_fminterval |= FSMP(hc_fminterval) << 16;
2228 retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2229 if (retval)
2230 return retval;
2231 switch (hc_control & OHCI_CTRL_HCFS) {
2232 case OHCI_USB_OPER:
2233 sleep_time = 0;
2234 break;
2235 case OHCI_USB_SUSPEND:
2236 case OHCI_USB_RESUME:
2237 hc_control &= OHCI_CTRL_RWC;
2238 hc_control |= OHCI_USB_RESUME;
2239 sleep_time = 10;
2240 break;
2241 default:
2242 hc_control &= OHCI_CTRL_RWC;
2243 hc_control |= OHCI_USB_RESET;
2244 sleep_time = 50;
2245 break;
2246 }
2247 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2248 if (retval)
2249 return retval;
2250 retval = ftdi_read_pcimem(ftdi, control, &control);
2251 if (retval)
2252 return retval;
2253 msleep(sleep_time);
2254 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2255 if (retval)
2256 return retval;
2257 if (!(roothub_a & RH_A_NPS)) { /* power down each port */
2258 for (temp = 0; temp < num_ports; temp++) {
2259 retval = ftdi_write_pcimem(ftdi,
2260 roothub.portstatus[temp], RH_PS_LSDA);
2261 if (retval)
2262 return retval;
2263 }
2264 }
2265 retval = ftdi_read_pcimem(ftdi, control, &control);
2266 if (retval)
2267 return retval;
2268retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2269 if (retval)
2270 return retval;
2271 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2272 if (retval)
2273 return retval;
2274extra:{
2275 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2276 if (retval)
2277 return retval;
2278 if (0 != (status & OHCI_HCR)) {
2279 if (--reset_timeout == 0) {
2280 dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2281 return -ENODEV;
2282 } else {
2283 msleep(5);
2284 goto extra;
2285 }
2286 }
2287 }
2288 if (quirk & OHCI_QUIRK_INITRESET) {
2289 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2290 if (retval)
2291 return retval;
2292 retval = ftdi_read_pcimem(ftdi, control, &control);
2293 if (retval)
2294 return retval;
2295 }
2296 retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2297 if (retval)
2298 return retval;
2299 retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2300 if (retval)
2301 return retval;
2302 retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2303 if (retval)
2304 return retval;
2305 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2306 if (retval)
2307 return retval;
2308 retval = ftdi_write_pcimem(ftdi, fminterval,
2309 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2310 if (retval)
2311 return retval;
2312 retval = ftdi_write_pcimem(ftdi, periodicstart,
2313 ((9 *hc_fminterval) / 10) & 0x3fff);
2314 if (retval)
2315 return retval;
2316 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2317 if (retval)
2318 return retval;
2319 retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2320 if (retval)
2321 return retval;
2322 if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2323 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2324 quirk |= OHCI_QUIRK_INITRESET;
2325 goto retry;
2326 } else
2327 dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2328 fminterval, periodicstart);
2329 } /* start controller operations */
2330 hc_control &= OHCI_CTRL_RWC;
2331 hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2332 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2333 if (retval)
2334 return retval;
2335 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2336 if (retval)
2337 return retval;
2338 retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2339 if (retval)
2340 return retval;
2341 retval = ftdi_read_pcimem(ftdi, control, &control);
2342 if (retval)
2343 return retval;
2344 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2345 if (retval)
2346 return retval;
2347 retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2348 if (retval)
2349 return retval;
2350 retval = ftdi_write_pcimem(ftdi, intrdisable,
2351 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2352 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2353 OHCI_INTR_SO);
2354 if (retval)
2355 return retval; /* handle root hub init quirks ... */
2356 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2357 if (retval)
2358 return retval;
2359 roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2360 if (quirk & OHCI_QUIRK_SUPERIO) {
2361 roothub_a |= RH_A_NOCP;
2362 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2363 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2364 if (retval)
2365 return retval;
2366 } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2367 roothub_a |= RH_A_NPS;
2368 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2369 if (retval)
2370 return retval;
2371 }
2372 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2373 if (retval)
2374 return retval;
2375 retval = ftdi_write_pcimem(ftdi, roothub.b,
2376 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2377 if (retval)
2378 return retval;
2379 retval = ftdi_read_pcimem(ftdi, control, &control);
2380 if (retval)
2381 return retval;
2382 mdelay((roothub_a >> 23) & 0x1fe);
2383 for (temp = 0; temp < num_ports; temp++) {
2384 u32 portstatus;
2385 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2386 &portstatus);
2387 if (retval)
2388 return retval;
2389 if (1 & portstatus)
2390 devices += 1;
2391 }
2392 return devices;
2393}
2394
2395static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2396{
2397 u32 latence_timer;
2398 int UxxxStatus;
2399 u32 pcidata;
2400 int reg = 0;
2401 int activePCIfn = fn << 8;
2402 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2403 if (UxxxStatus)
2404 return UxxxStatus;
2405 reg = 16;
2406 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2407 0xFFFFFFFF);
2408 if (UxxxStatus)
2409 return UxxxStatus;
2410 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2411 &pcidata);
2412 if (UxxxStatus)
2413 return UxxxStatus;
2414 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2415 0xF0000000);
2416 if (UxxxStatus)
2417 return UxxxStatus;
2418 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2419 &pcidata);
2420 if (UxxxStatus)
2421 return UxxxStatus;
2422 reg = 12;
2423 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2424 &latence_timer);
2425 if (UxxxStatus)
2426 return UxxxStatus;
2427 latence_timer &= 0xFFFF00FF;
2428 latence_timer |= 0x00001600;
2429 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2430 latence_timer);
2431 if (UxxxStatus)
2432 return UxxxStatus;
2433 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2434 &pcidata);
2435 if (UxxxStatus)
2436 return UxxxStatus;
2437 reg = 4;
2438 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2439 0x06);
2440 if (UxxxStatus)
2441 return UxxxStatus;
2442 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2443 &pcidata);
2444 if (UxxxStatus)
2445 return UxxxStatus;
2446 for (reg = 0; reg <= 0x54; reg += 4) {
2447 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2448 if (UxxxStatus)
2449 return UxxxStatus;
2450 }
2451 return 0;
2452}
2453
2454static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2455{
2456 u32 latence_timer;
2457 int UxxxStatus;
2458 u32 pcidata;
2459 int reg = 0;
2460 int activePCIfn = fn << 8;
2461 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2462 if (UxxxStatus)
2463 return UxxxStatus;
2464 reg = 16;
2465 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2466 0xFFFFFFFF);
2467 if (UxxxStatus)
2468 return UxxxStatus;
2469 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2470 &pcidata);
2471 if (UxxxStatus)
2472 return UxxxStatus;
2473 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2474 0x00000000);
2475 if (UxxxStatus)
2476 return UxxxStatus;
2477 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2478 &pcidata);
2479 if (UxxxStatus)
2480 return UxxxStatus;
2481 reg = 12;
2482 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2483 &latence_timer);
2484 if (UxxxStatus)
2485 return UxxxStatus;
2486 latence_timer &= 0xFFFF00FF;
2487 latence_timer |= 0x00001600;
2488 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2489 latence_timer);
2490 if (UxxxStatus)
2491 return UxxxStatus;
2492 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2493 &pcidata);
2494 if (UxxxStatus)
2495 return UxxxStatus;
2496 reg = 4;
2497 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2498 0x00);
2499 if (UxxxStatus)
2500 return UxxxStatus;
2501 return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2502}
2503
2504static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2505{
2506 int result;
2507 int UxxxStatus;
2508 UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2509 if (UxxxStatus)
2510 return UxxxStatus;
2511 result = ftdi_elan_check_controller(ftdi, quirk);
2512 UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2513 if (UxxxStatus)
2514 return UxxxStatus;
2515 return result;
2516}
2517
2518static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2519{
2520 u32 controlreg;
2521 u8 sensebits;
2522 int UxxxStatus;
2523 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2524 if (UxxxStatus)
2525 return UxxxStatus;
2526 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2527 if (UxxxStatus)
2528 return UxxxStatus;
2529 msleep(750);
2530 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2531 if (UxxxStatus)
2532 return UxxxStatus;
2533 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2534 if (UxxxStatus)
2535 return UxxxStatus;
2536 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2537 if (UxxxStatus)
2538 return UxxxStatus;
2539 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2540 if (UxxxStatus)
2541 return UxxxStatus;
2542 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2543 if (UxxxStatus)
2544 return UxxxStatus;
2545 msleep(250);
2546 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2547 if (UxxxStatus)
2548 return UxxxStatus;
2549 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2550 if (UxxxStatus)
2551 return UxxxStatus;
2552 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2553 if (UxxxStatus)
2554 return UxxxStatus;
2555 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2556 if (UxxxStatus)
2557 return UxxxStatus;
2558 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2559 if (UxxxStatus)
2560 return UxxxStatus;
2561 msleep(1000);
2562 sensebits = (controlreg >> 16) & 0x000F;
2563 if (0x0D == sensebits)
2564 return 0;
2565 else
2566 return - ENXIO;
2567}
2568
2569static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2570{
2571 int UxxxStatus;
2572 u32 pcidata;
2573 int reg = 0;
2574 u8 fn;
2575 int activePCIfn = 0;
2576 int max_devices = 0;
2577 int controllers = 0;
2578 int unrecognized = 0;
2579 ftdi->function = 0;
2580 for (fn = 0; (fn < 4); fn++) {
2581 u32 pciVID = 0;
2582 u32 pciPID = 0;
2583 int devices = 0;
2584 activePCIfn = fn << 8;
2585 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2586 &pcidata);
2587 if (UxxxStatus)
2588 return UxxxStatus;
2589 pciVID = pcidata & 0xFFFF;
2590 pciPID = (pcidata >> 16) & 0xFFFF;
2591 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2592 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2593 controllers += 1;
2594 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2595 {
2596 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2597 controllers += 1;
2598 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2599 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2600 controllers += 1;
2601 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2602 {
2603 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2604 controllers += 1;
2605 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2606 devices = ftdi_elan_found_controller(ftdi, fn,
2607 OHCI_QUIRK_AMD756);
2608 controllers += 1;
2609 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2610 devices = ftdi_elan_found_controller(ftdi, fn,
2611 OHCI_QUIRK_ZFMICRO);
2612 controllers += 1;
2613 } else if (0 == pcidata) {
2614 } else
2615 unrecognized += 1;
2616 if (devices > max_devices) {
2617 max_devices = devices;
2618 ftdi->function = fn + 1;
2619 ftdi->platform_data.vendor = pciVID;
2620 ftdi->platform_data.device = pciPID;
2621 }
2622 }
2623 if (ftdi->function > 0) {
2624 return ftdi_elan_setup_controller(ftdi, ftdi->function - 1);
2625 } else if (controllers > 0) {
2626 return -ENXIO;
2627 } else if (unrecognized > 0) {
2628 return -ENXIO;
2629 } else {
2630 ftdi->enumerated = 0;
2631 return -ENXIO;
2632 }
2633}
2634
2635
2636/*
2637 * we use only the first bulk-in and bulk-out endpoints
2638 */
2639static int ftdi_elan_probe(struct usb_interface *interface,
2640 const struct usb_device_id *id)
2641{
2642 struct usb_host_interface *iface_desc;
2643 struct usb_endpoint_descriptor *bulk_in, *bulk_out;
2644 int retval;
2645 struct usb_ftdi *ftdi;
2646
2647 ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2648 if (!ftdi)
2649 return -ENOMEM;
2650
2651 mutex_lock(&ftdi_module_lock);
2652 list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2653 ftdi->sequence_num = ++ftdi_instances;
2654 mutex_unlock(&ftdi_module_lock);
2655 ftdi_elan_init_kref(ftdi);
2656 sema_init(&ftdi->sw_lock, 1);
2657 ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2658 ftdi->interface = interface;
2659 mutex_init(&ftdi->u132_lock);
2660 ftdi->expected = 4;
2661
2662 iface_desc = interface->cur_altsetting;
2663 retval = usb_find_common_endpoints(iface_desc,
2664 &bulk_in, &bulk_out, NULL, NULL);
2665 if (retval) {
2666 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2667 goto error;
2668 }
2669
2670 ftdi->bulk_in_size = usb_endpoint_maxp(bulk_in);
2671 ftdi->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
2672 ftdi->bulk_in_buffer = kmalloc(ftdi->bulk_in_size, GFP_KERNEL);
2673 if (!ftdi->bulk_in_buffer) {
2674 retval = -ENOMEM;
2675 goto error;
2676 }
2677
2678 ftdi->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
2679
2680 dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2681 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2682 ftdi->bulk_out_endpointAddr);
2683 usb_set_intfdata(interface, ftdi);
2684 if (iface_desc->desc.bInterfaceNumber == 0 &&
2685 ftdi->bulk_in_endpointAddr == 0x81 &&
2686 ftdi->bulk_out_endpointAddr == 0x02) {
2687 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2688 if (retval) {
2689 dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2690 usb_set_intfdata(interface, NULL);
2691 retval = -ENOMEM;
2692 goto error;
2693 } else {
2694 ftdi->class = &ftdi_elan_jtag_class;
2695 dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2696 ftdi, iface_desc->desc.bInterfaceNumber,
2697 interface->minor);
2698 return 0;
2699 }
2700 } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2701 ftdi->bulk_in_endpointAddr == 0x83 &&
2702 ftdi->bulk_out_endpointAddr == 0x04) {
2703 ftdi->class = NULL;
2704 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2705 ftdi, iface_desc->desc.bInterfaceNumber);
2706 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2707 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2708 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2709 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2710 return 0;
2711 } else {
2712 dev_err(&ftdi->udev->dev,
2713 "Could not find ELAN's U132 device\n");
2714 retval = -ENODEV;
2715 goto error;
2716 }
2717error:if (ftdi) {
2718 ftdi_elan_put_kref(ftdi);
2719 }
2720 return retval;
2721}
2722
2723static void ftdi_elan_disconnect(struct usb_interface *interface)
2724{
2725 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2726 ftdi->disconnected += 1;
2727 if (ftdi->class) {
2728 int minor = interface->minor;
2729 struct usb_class_driver *class = ftdi->class;
2730 usb_set_intfdata(interface, NULL);
2731 usb_deregister_dev(interface, class);
2732 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2733 minor);
2734 } else {
2735 ftdi_status_cancel_work(ftdi);
2736 ftdi_command_cancel_work(ftdi);
2737 ftdi_response_cancel_work(ftdi);
2738 ftdi_elan_abandon_completions(ftdi);
2739 ftdi_elan_abandon_targets(ftdi);
2740 if (ftdi->registered) {
2741 platform_device_unregister(&ftdi->platform_dev);
2742 ftdi->synchronized = 0;
2743 ftdi->enumerated = 0;
2744 ftdi->initialized = 0;
2745 ftdi->registered = 0;
2746 }
2747 ftdi->disconnected += 1;
2748 usb_set_intfdata(interface, NULL);
2749 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2750 }
2751 ftdi_elan_put_kref(ftdi);
2752}
2753
2754static struct usb_driver ftdi_elan_driver = {
2755 .name = "ftdi-elan",
2756 .probe = ftdi_elan_probe,
2757 .disconnect = ftdi_elan_disconnect,
2758 .id_table = ftdi_elan_table,
2759};
2760static int __init ftdi_elan_init(void)
2761{
2762 int result;
2763 pr_info("driver %s\n", ftdi_elan_driver.name);
2764 mutex_init(&ftdi_module_lock);
2765 INIT_LIST_HEAD(&ftdi_static_list);
2766 result = usb_register(&ftdi_elan_driver);
2767 if (result) {
2768 pr_err("usb_register failed. Error number %d\n", result);
2769 }
2770 return result;
2771
2772}
2773
2774static void __exit ftdi_elan_exit(void)
2775{
2776 struct usb_ftdi *ftdi;
2777 struct usb_ftdi *temp;
2778 usb_deregister(&ftdi_elan_driver);
2779 pr_info("ftdi_u132 driver deregistered\n");
2780 list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2781 ftdi_status_cancel_work(ftdi);
2782 ftdi_command_cancel_work(ftdi);
2783 ftdi_response_cancel_work(ftdi);
2784 }
2785}
2786
2787
2788module_init(ftdi_elan_init);
2789module_exit(ftdi_elan_exit);
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>
51MODULE_AUTHOR("Tony Olech");
52MODULE_DESCRIPTION("FTDI ELAN driver");
53MODULE_LICENSE("GPL");
54#define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
55static bool distrust_firmware = 1;
56module_param(distrust_firmware, bool, 0);
57MODULE_PARM_DESC(distrust_firmware,
58 "true to distrust firmware power/overcurrent setup");
59extern struct platform_driver u132_platform_driver;
60/*
61 * ftdi_module_lock exists to protect access to global variables
62 *
63 */
64static struct mutex ftdi_module_lock;
65static int ftdi_instances = 0;
66static 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*/
85static 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
90MODULE_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)
106struct 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)
118struct u132_respond {
119 u8 header;
120 u8 address;
121 u32 *value;
122 int *result;
123 struct completion wait_completion;
124};
125struct 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*/
144struct 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)
192static struct usb_driver ftdi_elan_driver;
193static 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
207static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
208{
209 kref_put(&ftdi->kref, ftdi_elan_delete);
210}
211
212static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
213{
214 kref_get(&ftdi->kref);
215}
216
217static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
218{
219 kref_init(&ftdi->kref);
220}
221
222static 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
228static 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
234static 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
240static 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
246static 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
252static 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
258static 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
265static 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
271static 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
277void 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
285EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
286static void ftdi_release_platform_dev(struct device *dev)
287{
288 dev->parent = NULL;
289}
290
291static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
292 struct u132_target *target, u8 *buffer, int length);
293static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
294static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
295static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
296static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
297static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
298static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
299static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
300static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
301static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
302static 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
327static 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
339static 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
358static 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
416static 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
452static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
453{
454 ftdi_command_queue_work(ftdi, 0);
455}
456
457static 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
478static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
479{
480 ftdi_respond_queue_work(ftdi, 0);
481}
482
483static 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 */
518static 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 */
613static 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
640static 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 */
656static 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;
670have: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 }
688more: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
716static 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
730static 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
757static 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
769static 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
826static 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
847static 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
884static 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 */
912static 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;
919read:{
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 }
995more:{
996 goto read;
997 }
998have: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 */
1104static 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
1146exit:
1147 return count;
1148error_3:
1149 usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1150error_2:
1151 usb_free_urb(urb);
1152error_1:
1153 return retval;
1154}
1155
1156static 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 */
1169static 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
1208static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1209{
1210wait: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
1238static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1239 u8 width, u32 data)
1240{
1241 u8 addressofs = config_offset / 4;
1242wait: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
1270static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1271 u8 width, u32 data)
1272{
1273 u8 addressofs = mem_offset / 4;
1274wait: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
1302int 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
1310EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1311static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1312{
1313wait: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
1352static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1353 u8 width, u32 *data)
1354{
1355 u8 addressofs = config_offset / 4;
1356wait: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
1396static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1397 u8 width, u32 *data)
1398{
1399 u8 addressofs = mem_offset / 4;
1400wait: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
1440int 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
1451EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1452static 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;
1459wait: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
1496int 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
1508EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1509static 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;
1516wait: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
1561int 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
1573EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1574static 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;
1581wait: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
1618int 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
1630EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1631static 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;
1638wait: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
1697int 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
1709EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1710static 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;
1717wait: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
1762int 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
1774EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1775static 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
1821int 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
1829EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1830static 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;
1835more:{
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 */
1908static 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 */
1946static 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
1981static 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
2105static 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;
2110more:{
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
2177static 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)
2224static 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;
2299retry: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;
2305extra:{
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
2426static 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
2485static 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
2535static 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
2549static 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
2600static 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 */
2670static 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 }
2748error:if (ftdi) {
2749 ftdi_elan_put_kref(ftdi);
2750 }
2751 return retval;
2752}
2753
2754static 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
2785static 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};
2791static 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
2805static 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
2819module_init(ftdi_elan_init);
2820module_exit(ftdi_elan_exit);