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1/*
2* USB FTDI client driver for Elan Digital Systems's Uxxx adapters
3*
4* Copyright(C) 2006 Elan Digital Systems Limited
5* http://www.elandigitalsystems.com
6*
7* Author and Maintainer - Tony Olech - Elan Digital Systems
8* tony.olech@elandigitalsystems.com
9*
10* This program is free software;you can redistribute it and/or
11* modify it under the terms of the GNU General Public License as
12* published by the Free Software Foundation, version 2.
13*
14*
15* This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
16* based on various USB client drivers in the 2.6.15 linux kernel
17* with constant reference to the 3rd Edition of Linux Device Drivers
18* published by O'Reilly
19*
20* The U132 adapter is a USB to CardBus adapter specifically designed
21* for PC cards that contain an OHCI host controller. Typical PC cards
22* are the Orange Mobile 3G Option GlobeTrotter Fusion card.
23*
24* The U132 adapter will *NOT *work with PC cards that do not contain
25* an OHCI controller. A simple way to test whether a PC card has an
26* OHCI controller as an interface is to insert the PC card directly
27* into a laptop(or desktop) with a CardBus slot and if "lspci" shows
28* a new USB controller and "lsusb -v" shows a new OHCI Host Controller
29* then there is a good chance that the U132 adapter will support the
30* PC card.(you also need the specific client driver for the PC card)
31*
32* Please inform the Author and Maintainer about any PC cards that
33* contain OHCI Host Controller and work when directly connected to
34* an embedded CardBus slot but do not work when they are connected
35* via an ELAN U132 adapter.
36*
37*/
38#include <linux/kernel.h>
39#include <linux/errno.h>
40#include <linux/init.h>
41#include <linux/list.h>
42#include <linux/ioctl.h>
43#include <linux/pci_ids.h>
44#include <linux/slab.h>
45#include <linux/module.h>
46#include <linux/kref.h>
47#include <linux/mutex.h>
48#include <asm/uaccess.h>
49#include <linux/usb.h>
50#include <linux/workqueue.h>
51#include <linux/platform_device.h>
52MODULE_AUTHOR("Tony Olech");
53MODULE_DESCRIPTION("FTDI ELAN driver");
54MODULE_LICENSE("GPL");
55#define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
56static int distrust_firmware = 1;
57module_param(distrust_firmware, bool, 0);
58MODULE_PARM_DESC(distrust_firmware, "true to distrust firmware power/overcurren"
59 "t setup");
60extern struct platform_driver u132_platform_driver;
61static struct workqueue_struct *status_queue;
62static struct workqueue_struct *command_queue;
63static struct workqueue_struct *respond_queue;
64/*
65* ftdi_module_lock exists to protect access to global variables
66*
67*/
68static struct mutex ftdi_module_lock;
69static int ftdi_instances = 0;
70static struct list_head ftdi_static_list;
71/*
72* end of the global variables protected by ftdi_module_lock
73*/
74#include "usb_u132.h"
75#include <asm/io.h>
76#include <linux/usb/hcd.h>
77
78 /* FIXME ohci.h is ONLY for internal use by the OHCI driver.
79 * If you're going to try stuff like this, you need to split
80 * out shareable stuff (register declarations?) into its own
81 * file, maybe name <linux/usb/ohci.h>
82 */
83
84#include "../host/ohci.h"
85/* Define these values to match your devices*/
86#define USB_FTDI_ELAN_VENDOR_ID 0x0403
87#define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
88/* table of devices that work with this driver*/
89static const struct usb_device_id ftdi_elan_table[] = {
90 {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
91 { /* Terminating entry */ }
92};
93
94MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
95/* only the jtag(firmware upgrade device) interface requires
96* a device file and corresponding minor number, but the
97* interface is created unconditionally - I suppose it could
98* be configured or not according to a module parameter.
99* But since we(now) require one interface per device,
100* and since it unlikely that a normal installation would
101* require more than a couple of elan-ftdi devices, 8 seems
102* like a reasonable limit to have here, and if someone
103* really requires more than 8 devices, then they can frig the
104* code and recompile
105*/
106#define USB_FTDI_ELAN_MINOR_BASE 192
107#define COMMAND_BITS 5
108#define COMMAND_SIZE (1<<COMMAND_BITS)
109#define COMMAND_MASK (COMMAND_SIZE-1)
110struct u132_command {
111 u8 header;
112 u16 length;
113 u8 address;
114 u8 width;
115 u32 value;
116 int follows;
117 void *buffer;
118};
119#define RESPOND_BITS 5
120#define RESPOND_SIZE (1<<RESPOND_BITS)
121#define RESPOND_MASK (RESPOND_SIZE-1)
122struct u132_respond {
123 u8 header;
124 u8 address;
125 u32 *value;
126 int *result;
127 struct completion wait_completion;
128};
129struct u132_target {
130 void *endp;
131 struct urb *urb;
132 int toggle_bits;
133 int error_count;
134 int condition_code;
135 int repeat_number;
136 int halted;
137 int skipped;
138 int actual;
139 int non_null;
140 int active;
141 int abandoning;
142 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
143 int toggle_bits, int error_count, int condition_code,
144 int repeat_number, int halted, int skipped, int actual,
145 int non_null);
146};
147/* Structure to hold all of our device specific stuff*/
148struct usb_ftdi {
149 struct list_head ftdi_list;
150 struct mutex u132_lock;
151 int command_next;
152 int command_head;
153 struct u132_command command[COMMAND_SIZE];
154 int respond_next;
155 int respond_head;
156 struct u132_respond respond[RESPOND_SIZE];
157 struct u132_target target[4];
158 char device_name[16];
159 unsigned synchronized:1;
160 unsigned enumerated:1;
161 unsigned registered:1;
162 unsigned initialized:1;
163 unsigned card_ejected:1;
164 int function;
165 int sequence_num;
166 int disconnected;
167 int gone_away;
168 int stuck_status;
169 int status_queue_delay;
170 struct semaphore sw_lock;
171 struct usb_device *udev;
172 struct usb_interface *interface;
173 struct usb_class_driver *class;
174 struct delayed_work status_work;
175 struct delayed_work command_work;
176 struct delayed_work respond_work;
177 struct u132_platform_data platform_data;
178 struct resource resources[0];
179 struct platform_device platform_dev;
180 unsigned char *bulk_in_buffer;
181 size_t bulk_in_size;
182 size_t bulk_in_last;
183 size_t bulk_in_left;
184 __u8 bulk_in_endpointAddr;
185 __u8 bulk_out_endpointAddr;
186 struct kref kref;
187 u32 controlreg;
188 u8 response[4 + 1024];
189 int expected;
190 int received;
191 int ed_found;
192};
193#define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
194#define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
195 platform_dev)
196static struct usb_driver ftdi_elan_driver;
197static void ftdi_elan_delete(struct kref *kref)
198{
199 struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
200 dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
201 usb_put_dev(ftdi->udev);
202 ftdi->disconnected += 1;
203 mutex_lock(&ftdi_module_lock);
204 list_del_init(&ftdi->ftdi_list);
205 ftdi_instances -= 1;
206 mutex_unlock(&ftdi_module_lock);
207 kfree(ftdi->bulk_in_buffer);
208 ftdi->bulk_in_buffer = NULL;
209}
210
211static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
212{
213 kref_put(&ftdi->kref, ftdi_elan_delete);
214}
215
216static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
217{
218 kref_get(&ftdi->kref);
219}
220
221static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
222{
223 kref_init(&ftdi->kref);
224}
225
226static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
227{
228 if (!queue_delayed_work(status_queue, &ftdi->status_work, delta))
229 kref_put(&ftdi->kref, ftdi_elan_delete);
230}
231
232static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
233{
234 if (queue_delayed_work(status_queue, &ftdi->status_work, delta))
235 kref_get(&ftdi->kref);
236}
237
238static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
239{
240 if (cancel_delayed_work(&ftdi->status_work))
241 kref_put(&ftdi->kref, ftdi_elan_delete);
242}
243
244static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
245{
246 if (!queue_delayed_work(command_queue, &ftdi->command_work, delta))
247 kref_put(&ftdi->kref, ftdi_elan_delete);
248}
249
250static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
251{
252 if (queue_delayed_work(command_queue, &ftdi->command_work, delta))
253 kref_get(&ftdi->kref);
254}
255
256static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
257{
258 if (cancel_delayed_work(&ftdi->command_work))
259 kref_put(&ftdi->kref, ftdi_elan_delete);
260}
261
262static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
263 unsigned int delta)
264{
265 if (!queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
266 kref_put(&ftdi->kref, ftdi_elan_delete);
267}
268
269static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
270{
271 if (queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
272 kref_get(&ftdi->kref);
273}
274
275static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
276{
277 if (cancel_delayed_work(&ftdi->respond_work))
278 kref_put(&ftdi->kref, ftdi_elan_delete);
279}
280
281void ftdi_elan_gone_away(struct platform_device *pdev)
282{
283 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
284 ftdi->gone_away += 1;
285 ftdi_elan_put_kref(ftdi);
286}
287
288
289EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
290static void ftdi_release_platform_dev(struct device *dev)
291{
292 dev->parent = NULL;
293}
294
295static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
296 struct u132_target *target, u8 *buffer, int length);
297static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
298static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
299static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
300static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
301static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
302static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
303static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
304static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
305static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
306static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
307{
308 int result;
309 if (ftdi->platform_dev.dev.parent)
310 return -EBUSY;
311 ftdi_elan_get_kref(ftdi);
312 ftdi->platform_data.potpg = 100;
313 ftdi->platform_data.reset = NULL;
314 ftdi->platform_dev.id = ftdi->sequence_num;
315 ftdi->platform_dev.resource = ftdi->resources;
316 ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
317 ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
318 ftdi->platform_dev.dev.parent = NULL;
319 ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
320 ftdi->platform_dev.dev.dma_mask = NULL;
321 snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
322 ftdi->platform_dev.name = ftdi->device_name;
323 dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
324 request_module("u132_hcd");
325 dev_info(&ftdi->udev->dev, "registering '%s'\n",
326 ftdi->platform_dev.name);
327 result = platform_device_register(&ftdi->platform_dev);
328 return result;
329}
330
331static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
332{
333 mutex_lock(&ftdi->u132_lock);
334 while (ftdi->respond_next > ftdi->respond_head) {
335 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
336 ftdi->respond_head++];
337 *respond->result = -ESHUTDOWN;
338 *respond->value = 0;
339 complete(&respond->wait_completion);
340 } mutex_unlock(&ftdi->u132_lock);
341}
342
343static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
344{
345 int ed_number = 4;
346 mutex_lock(&ftdi->u132_lock);
347 while (ed_number-- > 0) {
348 struct u132_target *target = &ftdi->target[ed_number];
349 if (target->active == 1) {
350 target->condition_code = TD_DEVNOTRESP;
351 mutex_unlock(&ftdi->u132_lock);
352 ftdi_elan_do_callback(ftdi, target, NULL, 0);
353 mutex_lock(&ftdi->u132_lock);
354 }
355 }
356 ftdi->received = 0;
357 ftdi->expected = 4;
358 ftdi->ed_found = 0;
359 mutex_unlock(&ftdi->u132_lock);
360}
361
362static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
363{
364 int ed_number = 4;
365 mutex_lock(&ftdi->u132_lock);
366 while (ed_number-- > 0) {
367 struct u132_target *target = &ftdi->target[ed_number];
368 target->abandoning = 1;
369 wait_1:if (target->active == 1) {
370 int command_size = ftdi->command_next -
371 ftdi->command_head;
372 if (command_size < COMMAND_SIZE) {
373 struct u132_command *command = &ftdi->command[
374 COMMAND_MASK & ftdi->command_next];
375 command->header = 0x80 | (ed_number << 5) | 0x4;
376 command->length = 0x00;
377 command->address = 0x00;
378 command->width = 0x00;
379 command->follows = 0;
380 command->value = 0;
381 command->buffer = &command->value;
382 ftdi->command_next += 1;
383 ftdi_elan_kick_command_queue(ftdi);
384 } else {
385 mutex_unlock(&ftdi->u132_lock);
386 msleep(100);
387 mutex_lock(&ftdi->u132_lock);
388 goto wait_1;
389 }
390 }
391 wait_2:if (target->active == 1) {
392 int command_size = ftdi->command_next -
393 ftdi->command_head;
394 if (command_size < COMMAND_SIZE) {
395 struct u132_command *command = &ftdi->command[
396 COMMAND_MASK & ftdi->command_next];
397 command->header = 0x90 | (ed_number << 5);
398 command->length = 0x00;
399 command->address = 0x00;
400 command->width = 0x00;
401 command->follows = 0;
402 command->value = 0;
403 command->buffer = &command->value;
404 ftdi->command_next += 1;
405 ftdi_elan_kick_command_queue(ftdi);
406 } else {
407 mutex_unlock(&ftdi->u132_lock);
408 msleep(100);
409 mutex_lock(&ftdi->u132_lock);
410 goto wait_2;
411 }
412 }
413 }
414 ftdi->received = 0;
415 ftdi->expected = 4;
416 ftdi->ed_found = 0;
417 mutex_unlock(&ftdi->u132_lock);
418}
419
420static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
421{
422 int ed_number = 4;
423 mutex_lock(&ftdi->u132_lock);
424 while (ed_number-- > 0) {
425 struct u132_target *target = &ftdi->target[ed_number];
426 target->abandoning = 1;
427 wait:if (target->active == 1) {
428 int command_size = ftdi->command_next -
429 ftdi->command_head;
430 if (command_size < COMMAND_SIZE) {
431 struct u132_command *command = &ftdi->command[
432 COMMAND_MASK & ftdi->command_next];
433 command->header = 0x80 | (ed_number << 5) | 0x4;
434 command->length = 0x00;
435 command->address = 0x00;
436 command->width = 0x00;
437 command->follows = 0;
438 command->value = 0;
439 command->buffer = &command->value;
440 ftdi->command_next += 1;
441 ftdi_elan_kick_command_queue(ftdi);
442 } else {
443 mutex_unlock(&ftdi->u132_lock);
444 msleep(100);
445 mutex_lock(&ftdi->u132_lock);
446 goto wait;
447 }
448 }
449 }
450 ftdi->received = 0;
451 ftdi->expected = 4;
452 ftdi->ed_found = 0;
453 mutex_unlock(&ftdi->u132_lock);
454}
455
456static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
457{
458 ftdi_command_queue_work(ftdi, 0);
459}
460
461static void ftdi_elan_command_work(struct work_struct *work)
462{
463 struct usb_ftdi *ftdi =
464 container_of(work, struct usb_ftdi, command_work.work);
465
466 if (ftdi->disconnected > 0) {
467 ftdi_elan_put_kref(ftdi);
468 return;
469 } else {
470 int retval = ftdi_elan_command_engine(ftdi);
471 if (retval == -ESHUTDOWN) {
472 ftdi->disconnected += 1;
473 } else if (retval == -ENODEV) {
474 ftdi->disconnected += 1;
475 } else if (retval)
476 dev_err(&ftdi->udev->dev, "command error %d\n", retval);
477 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
478 return;
479 }
480}
481
482static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
483{
484 ftdi_respond_queue_work(ftdi, 0);
485}
486
487static void ftdi_elan_respond_work(struct work_struct *work)
488{
489 struct usb_ftdi *ftdi =
490 container_of(work, struct usb_ftdi, respond_work.work);
491 if (ftdi->disconnected > 0) {
492 ftdi_elan_put_kref(ftdi);
493 return;
494 } else {
495 int retval = ftdi_elan_respond_engine(ftdi);
496 if (retval == 0) {
497 } else if (retval == -ESHUTDOWN) {
498 ftdi->disconnected += 1;
499 } else if (retval == -ENODEV) {
500 ftdi->disconnected += 1;
501 } else if (retval == -EILSEQ) {
502 ftdi->disconnected += 1;
503 } else {
504 ftdi->disconnected += 1;
505 dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
506 }
507 if (ftdi->disconnected > 0) {
508 ftdi_elan_abandon_completions(ftdi);
509 ftdi_elan_abandon_targets(ftdi);
510 }
511 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
512 return;
513 }
514}
515
516
517/*
518* the sw_lock is initially held and will be freed
519* after the FTDI has been synchronized
520*
521*/
522static void ftdi_elan_status_work(struct work_struct *work)
523{
524 struct usb_ftdi *ftdi =
525 container_of(work, struct usb_ftdi, status_work.work);
526 int work_delay_in_msec = 0;
527 if (ftdi->disconnected > 0) {
528 ftdi_elan_put_kref(ftdi);
529 return;
530 } else if (ftdi->synchronized == 0) {
531 down(&ftdi->sw_lock);
532 if (ftdi_elan_synchronize(ftdi) == 0) {
533 ftdi->synchronized = 1;
534 ftdi_command_queue_work(ftdi, 1);
535 ftdi_respond_queue_work(ftdi, 1);
536 up(&ftdi->sw_lock);
537 work_delay_in_msec = 100;
538 } else {
539 dev_err(&ftdi->udev->dev, "synchronize failed\n");
540 up(&ftdi->sw_lock);
541 work_delay_in_msec = 10 *1000;
542 }
543 } else if (ftdi->stuck_status > 0) {
544 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
545 ftdi->stuck_status = 0;
546 ftdi->synchronized = 0;
547 } else if ((ftdi->stuck_status++ % 60) == 1) {
548 dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
549 "- please remove\n");
550 } else
551 dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
552 "- checked %d times\n", ftdi->stuck_status);
553 work_delay_in_msec = 100;
554 } else if (ftdi->enumerated == 0) {
555 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
556 ftdi->enumerated = 1;
557 work_delay_in_msec = 250;
558 } else
559 work_delay_in_msec = 1000;
560 } else if (ftdi->initialized == 0) {
561 if (ftdi_elan_setupOHCI(ftdi) == 0) {
562 ftdi->initialized = 1;
563 work_delay_in_msec = 500;
564 } else {
565 dev_err(&ftdi->udev->dev, "initialized failed - trying "
566 "again in 10 seconds\n");
567 work_delay_in_msec = 1 *1000;
568 }
569 } else if (ftdi->registered == 0) {
570 work_delay_in_msec = 10;
571 if (ftdi_elan_hcd_init(ftdi) == 0) {
572 ftdi->registered = 1;
573 } else
574 dev_err(&ftdi->udev->dev, "register failed\n");
575 work_delay_in_msec = 250;
576 } else {
577 if (ftdi_elan_checkingPCI(ftdi) == 0) {
578 work_delay_in_msec = 250;
579 } else if (ftdi->controlreg & 0x00400000) {
580 if (ftdi->gone_away > 0) {
581 dev_err(&ftdi->udev->dev, "PCI device eject con"
582 "firmed platform_dev.dev.parent=%p plat"
583 "form_dev.dev=%p\n",
584 ftdi->platform_dev.dev.parent,
585 &ftdi->platform_dev.dev);
586 platform_device_unregister(&ftdi->platform_dev);
587 ftdi->platform_dev.dev.parent = NULL;
588 ftdi->registered = 0;
589 ftdi->enumerated = 0;
590 ftdi->card_ejected = 0;
591 ftdi->initialized = 0;
592 ftdi->gone_away = 0;
593 } else
594 ftdi_elan_flush_targets(ftdi);
595 work_delay_in_msec = 250;
596 } else {
597 dev_err(&ftdi->udev->dev, "PCI device has disappeared\n"
598 );
599 ftdi_elan_cancel_targets(ftdi);
600 work_delay_in_msec = 500;
601 ftdi->enumerated = 0;
602 ftdi->initialized = 0;
603 }
604 }
605 if (ftdi->disconnected > 0) {
606 ftdi_elan_put_kref(ftdi);
607 return;
608 } else {
609 ftdi_status_requeue_work(ftdi,
610 msecs_to_jiffies(work_delay_in_msec));
611 return;
612 }
613}
614
615
616/*
617* file_operations for the jtag interface
618*
619* the usage count for the device is incremented on open()
620* and decremented on release()
621*/
622static int ftdi_elan_open(struct inode *inode, struct file *file)
623{
624 int subminor;
625 struct usb_interface *interface;
626
627 subminor = iminor(inode);
628 interface = usb_find_interface(&ftdi_elan_driver, subminor);
629
630 if (!interface) {
631 printk(KERN_ERR "can't find device for minor %d\n", subminor);
632 return -ENODEV;
633 } else {
634 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
635 if (!ftdi) {
636 return -ENODEV;
637 } else {
638 if (down_interruptible(&ftdi->sw_lock)) {
639 return -EINTR;
640 } else {
641 ftdi_elan_get_kref(ftdi);
642 file->private_data = ftdi;
643 return 0;
644 }
645 }
646 }
647}
648
649static int ftdi_elan_release(struct inode *inode, struct file *file)
650{
651 struct usb_ftdi *ftdi = file->private_data;
652 if (ftdi == NULL)
653 return -ENODEV;
654 up(&ftdi->sw_lock); /* decrement the count on our device */
655 ftdi_elan_put_kref(ftdi);
656 return 0;
657}
658
659
660/*
661*
662* blocking bulk reads are used to get data from the device
663*
664*/
665static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
666 size_t count, loff_t *ppos)
667{
668 char data[30 *3 + 4];
669 char *d = data;
670 int m = (sizeof(data) - 1) / 3;
671 int bytes_read = 0;
672 int retry_on_empty = 10;
673 int retry_on_timeout = 5;
674 struct usb_ftdi *ftdi = file->private_data;
675 if (ftdi->disconnected > 0) {
676 return -ENODEV;
677 }
678 data[0] = 0;
679 have:if (ftdi->bulk_in_left > 0) {
680 if (count-- > 0) {
681 char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
682 ftdi->bulk_in_left -= 1;
683 if (bytes_read < m) {
684 d += sprintf(d, " %02X", 0x000000FF & *p);
685 } else if (bytes_read > m) {
686 } else
687 d += sprintf(d, " ..");
688 if (copy_to_user(buffer++, p, 1)) {
689 return -EFAULT;
690 } else {
691 bytes_read += 1;
692 goto have;
693 }
694 } else
695 return bytes_read;
696 }
697 more:if (count > 0) {
698 int packet_bytes = 0;
699 int retval = usb_bulk_msg(ftdi->udev,
700 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
701 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
702 &packet_bytes, 50);
703 if (packet_bytes > 2) {
704 ftdi->bulk_in_left = packet_bytes - 2;
705 ftdi->bulk_in_last = 1;
706 goto have;
707 } else if (retval == -ETIMEDOUT) {
708 if (retry_on_timeout-- > 0) {
709 goto more;
710 } else if (bytes_read > 0) {
711 return bytes_read;
712 } else
713 return retval;
714 } else if (retval == 0) {
715 if (retry_on_empty-- > 0) {
716 goto more;
717 } else
718 return bytes_read;
719 } else
720 return retval;
721 } else
722 return bytes_read;
723}
724
725static void ftdi_elan_write_bulk_callback(struct urb *urb)
726{
727 struct usb_ftdi *ftdi = urb->context;
728 int status = urb->status;
729
730 if (status && !(status == -ENOENT || status == -ECONNRESET ||
731 status == -ESHUTDOWN)) {
732 dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %"
733 "d\n", urb, status);
734 }
735 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
736 urb->transfer_buffer, urb->transfer_dma);
737}
738
739static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
740 char *buf, int command_size, int total_size)
741{
742 int ed_commands = 0;
743 int b = 0;
744 int I = command_size;
745 int i = ftdi->command_head;
746 while (I-- > 0) {
747 struct u132_command *command = &ftdi->command[COMMAND_MASK &
748 i++];
749 int F = command->follows;
750 u8 *f = command->buffer;
751 if (command->header & 0x80) {
752 ed_commands |= 1 << (0x3 & (command->header >> 5));
753 }
754 buf[b++] = command->header;
755 buf[b++] = (command->length >> 0) & 0x00FF;
756 buf[b++] = (command->length >> 8) & 0x00FF;
757 buf[b++] = command->address;
758 buf[b++] = command->width;
759 while (F-- > 0) {
760 buf[b++] = *f++;
761 }
762 }
763 return ed_commands;
764}
765
766static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
767{
768 int total_size = 0;
769 int I = command_size;
770 int i = ftdi->command_head;
771 while (I-- > 0) {
772 struct u132_command *command = &ftdi->command[COMMAND_MASK &
773 i++];
774 total_size += 5 + command->follows;
775 } return total_size;
776}
777
778static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
779{
780 int retval;
781 char *buf;
782 int ed_commands;
783 int total_size;
784 struct urb *urb;
785 int command_size = ftdi->command_next - ftdi->command_head;
786 if (command_size == 0)
787 return 0;
788 total_size = ftdi_elan_total_command_size(ftdi, command_size);
789 urb = usb_alloc_urb(0, GFP_KERNEL);
790 if (!urb) {
791 dev_err(&ftdi->udev->dev, "could not get a urb to write %d comm"
792 "ands totaling %d bytes to the Uxxx\n", command_size,
793 total_size);
794 return -ENOMEM;
795 }
796 buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
797 &urb->transfer_dma);
798 if (!buf) {
799 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d c"
800 "ommands totaling %d bytes to the Uxxx\n", command_size,
801 total_size);
802 usb_free_urb(urb);
803 return -ENOMEM;
804 }
805 ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
806 command_size, total_size);
807 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
808 ftdi->bulk_out_endpointAddr), buf, total_size,
809 ftdi_elan_write_bulk_callback, ftdi);
810 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
811 if (ed_commands) {
812 char diag[40 *3 + 4];
813 char *d = diag;
814 int m = total_size;
815 u8 *c = buf;
816 int s = (sizeof(diag) - 1) / 3;
817 diag[0] = 0;
818 while (s-- > 0 && m-- > 0) {
819 if (s > 0 || m == 0) {
820 d += sprintf(d, " %02X", *c++);
821 } else
822 d += sprintf(d, " ..");
823 }
824 }
825 retval = usb_submit_urb(urb, GFP_KERNEL);
826 if (retval) {
827 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write "
828 "%d commands totaling %d bytes to the Uxxx\n", retval,
829 urb, command_size, total_size);
830 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
831 usb_free_urb(urb);
832 return retval;
833 }
834 usb_free_urb(urb); /* release our reference to this urb,
835 the USB core will eventually free it entirely */
836 ftdi->command_head += command_size;
837 ftdi_elan_kick_respond_queue(ftdi);
838 return 0;
839}
840
841static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
842 struct u132_target *target, u8 *buffer, int length)
843{
844 struct urb *urb = target->urb;
845 int halted = target->halted;
846 int skipped = target->skipped;
847 int actual = target->actual;
848 int non_null = target->non_null;
849 int toggle_bits = target->toggle_bits;
850 int error_count = target->error_count;
851 int condition_code = target->condition_code;
852 int repeat_number = target->repeat_number;
853 void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
854 int, int, int, int) = target->callback;
855 target->active -= 1;
856 target->callback = NULL;
857 (*callback) (target->endp, urb, buffer, length, toggle_bits,
858 error_count, condition_code, repeat_number, halted, skipped,
859 actual, non_null);
860}
861
862static char *have_ed_set_response(struct usb_ftdi *ftdi,
863 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
864 char *b)
865{
866 int payload = (ed_length >> 0) & 0x07FF;
867 mutex_lock(&ftdi->u132_lock);
868 target->actual = 0;
869 target->non_null = (ed_length >> 15) & 0x0001;
870 target->repeat_number = (ed_length >> 11) & 0x000F;
871 if (ed_type == 0x02) {
872 if (payload == 0 || target->abandoning > 0) {
873 target->abandoning = 0;
874 mutex_unlock(&ftdi->u132_lock);
875 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
876 payload);
877 ftdi->received = 0;
878 ftdi->expected = 4;
879 ftdi->ed_found = 0;
880 return ftdi->response;
881 } else {
882 ftdi->expected = 4 + payload;
883 ftdi->ed_found = 1;
884 mutex_unlock(&ftdi->u132_lock);
885 return b;
886 }
887 } else if (ed_type == 0x03) {
888 if (payload == 0 || target->abandoning > 0) {
889 target->abandoning = 0;
890 mutex_unlock(&ftdi->u132_lock);
891 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
892 payload);
893 ftdi->received = 0;
894 ftdi->expected = 4;
895 ftdi->ed_found = 0;
896 return ftdi->response;
897 } else {
898 ftdi->expected = 4 + payload;
899 ftdi->ed_found = 1;
900 mutex_unlock(&ftdi->u132_lock);
901 return b;
902 }
903 } else if (ed_type == 0x01) {
904 target->abandoning = 0;
905 mutex_unlock(&ftdi->u132_lock);
906 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
907 payload);
908 ftdi->received = 0;
909 ftdi->expected = 4;
910 ftdi->ed_found = 0;
911 return ftdi->response;
912 } else {
913 target->abandoning = 0;
914 mutex_unlock(&ftdi->u132_lock);
915 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
916 payload);
917 ftdi->received = 0;
918 ftdi->expected = 4;
919 ftdi->ed_found = 0;
920 return ftdi->response;
921 }
922}
923
924static char *have_ed_get_response(struct usb_ftdi *ftdi,
925 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
926 char *b)
927{
928 mutex_lock(&ftdi->u132_lock);
929 target->condition_code = TD_DEVNOTRESP;
930 target->actual = (ed_length >> 0) & 0x01FF;
931 target->non_null = (ed_length >> 15) & 0x0001;
932 target->repeat_number = (ed_length >> 11) & 0x000F;
933 mutex_unlock(&ftdi->u132_lock);
934 if (target->active)
935 ftdi_elan_do_callback(ftdi, target, NULL, 0);
936 target->abandoning = 0;
937 ftdi->received = 0;
938 ftdi->expected = 4;
939 ftdi->ed_found = 0;
940 return ftdi->response;
941}
942
943
944/*
945* The engine tries to empty the FTDI fifo
946*
947* all responses found in the fifo data are dispatched thus
948* the response buffer can only ever hold a maximum sized
949* response from the Uxxx.
950*
951*/
952static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
953{
954 u8 *b = ftdi->response + ftdi->received;
955 int bytes_read = 0;
956 int retry_on_empty = 1;
957 int retry_on_timeout = 3;
958 int empty_packets = 0;
959 read:{
960 int packet_bytes = 0;
961 int retval = usb_bulk_msg(ftdi->udev,
962 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
963 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
964 &packet_bytes, 500);
965 char diag[30 *3 + 4];
966 char *d = diag;
967 int m = packet_bytes;
968 u8 *c = ftdi->bulk_in_buffer;
969 int s = (sizeof(diag) - 1) / 3;
970 diag[0] = 0;
971 while (s-- > 0 && m-- > 0) {
972 if (s > 0 || m == 0) {
973 d += sprintf(d, " %02X", *c++);
974 } else
975 d += sprintf(d, " ..");
976 }
977 if (packet_bytes > 2) {
978 ftdi->bulk_in_left = packet_bytes - 2;
979 ftdi->bulk_in_last = 1;
980 goto have;
981 } else if (retval == -ETIMEDOUT) {
982 if (retry_on_timeout-- > 0) {
983 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
984 "t_bytes = %d with total %d bytes%s\n",
985 packet_bytes, bytes_read, diag);
986 goto more;
987 } else if (bytes_read > 0) {
988 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
989 bytes_read, diag);
990 return -ENOMEM;
991 } else {
992 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
993 "t_bytes = %d with total %d bytes%s\n",
994 packet_bytes, bytes_read, diag);
995 return -ENOMEM;
996 }
997 } else if (retval == -EILSEQ) {
998 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
999 " = %d with total %d bytes%s\n", retval,
1000 packet_bytes, bytes_read, diag);
1001 return retval;
1002 } else if (retval) {
1003 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1004 " = %d with total %d bytes%s\n", retval,
1005 packet_bytes, bytes_read, diag);
1006 return retval;
1007 } else if (packet_bytes == 2) {
1008 unsigned char s0 = ftdi->bulk_in_buffer[0];
1009 unsigned char s1 = ftdi->bulk_in_buffer[1];
1010 empty_packets += 1;
1011 if (s0 == 0x31 && s1 == 0x60) {
1012 if (retry_on_empty-- > 0) {
1013 goto more;
1014 } else
1015 return 0;
1016 } else if (s0 == 0x31 && s1 == 0x00) {
1017 if (retry_on_empty-- > 0) {
1018 goto more;
1019 } else
1020 return 0;
1021 } else {
1022 if (retry_on_empty-- > 0) {
1023 goto more;
1024 } else
1025 return 0;
1026 }
1027 } else if (packet_bytes == 1) {
1028 if (retry_on_empty-- > 0) {
1029 goto more;
1030 } else
1031 return 0;
1032 } else {
1033 if (retry_on_empty-- > 0) {
1034 goto more;
1035 } else
1036 return 0;
1037 }
1038 }
1039 more:{
1040 goto read;
1041 }
1042 have:if (ftdi->bulk_in_left > 0) {
1043 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1044 bytes_read += 1;
1045 ftdi->bulk_in_left -= 1;
1046 if (ftdi->received == 0 && c == 0xFF) {
1047 goto have;
1048 } else
1049 *b++ = c;
1050 if (++ftdi->received < ftdi->expected) {
1051 goto have;
1052 } else if (ftdi->ed_found) {
1053 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1054 u16 ed_length = (ftdi->response[2] << 8) |
1055 ftdi->response[1];
1056 struct u132_target *target = &ftdi->target[ed_number];
1057 int payload = (ed_length >> 0) & 0x07FF;
1058 char diag[30 *3 + 4];
1059 char *d = diag;
1060 int m = payload;
1061 u8 *c = 4 + ftdi->response;
1062 int s = (sizeof(diag) - 1) / 3;
1063 diag[0] = 0;
1064 while (s-- > 0 && m-- > 0) {
1065 if (s > 0 || m == 0) {
1066 d += sprintf(d, " %02X", *c++);
1067 } else
1068 d += sprintf(d, " ..");
1069 }
1070 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1071 payload);
1072 ftdi->received = 0;
1073 ftdi->expected = 4;
1074 ftdi->ed_found = 0;
1075 b = ftdi->response;
1076 goto have;
1077 } else if (ftdi->expected == 8) {
1078 u8 buscmd;
1079 int respond_head = ftdi->respond_head++;
1080 struct u132_respond *respond = &ftdi->respond[
1081 RESPOND_MASK & respond_head];
1082 u32 data = ftdi->response[7];
1083 data <<= 8;
1084 data |= ftdi->response[6];
1085 data <<= 8;
1086 data |= ftdi->response[5];
1087 data <<= 8;
1088 data |= ftdi->response[4];
1089 *respond->value = data;
1090 *respond->result = 0;
1091 complete(&respond->wait_completion);
1092 ftdi->received = 0;
1093 ftdi->expected = 4;
1094 ftdi->ed_found = 0;
1095 b = ftdi->response;
1096 buscmd = (ftdi->response[0] >> 0) & 0x0F;
1097 if (buscmd == 0x00) {
1098 } else if (buscmd == 0x02) {
1099 } else if (buscmd == 0x06) {
1100 } else if (buscmd == 0x0A) {
1101 } else
1102 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) va"
1103 "lue = %08X\n", buscmd, data);
1104 goto have;
1105 } else {
1106 if ((ftdi->response[0] & 0x80) == 0x00) {
1107 ftdi->expected = 8;
1108 goto have;
1109 } else {
1110 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1111 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1112 u16 ed_length = (ftdi->response[2] << 8) |
1113 ftdi->response[1];
1114 struct u132_target *target = &ftdi->target[
1115 ed_number];
1116 target->halted = (ftdi->response[0] >> 3) &
1117 0x01;
1118 target->skipped = (ftdi->response[0] >> 2) &
1119 0x01;
1120 target->toggle_bits = (ftdi->response[3] >> 6)
1121 & 0x03;
1122 target->error_count = (ftdi->response[3] >> 4)
1123 & 0x03;
1124 target->condition_code = (ftdi->response[
1125 3] >> 0) & 0x0F;
1126 if ((ftdi->response[0] & 0x10) == 0x00) {
1127 b = have_ed_set_response(ftdi, target,
1128 ed_length, ed_number, ed_type,
1129 b);
1130 goto have;
1131 } else {
1132 b = have_ed_get_response(ftdi, target,
1133 ed_length, ed_number, ed_type,
1134 b);
1135 goto have;
1136 }
1137 }
1138 }
1139 } else
1140 goto more;
1141}
1142
1143
1144/*
1145* create a urb, and a buffer for it, and copy the data to the urb
1146*
1147*/
1148static ssize_t ftdi_elan_write(struct file *file,
1149 const char __user *user_buffer, size_t count,
1150 loff_t *ppos)
1151{
1152 int retval = 0;
1153 struct urb *urb;
1154 char *buf;
1155 struct usb_ftdi *ftdi = file->private_data;
1156
1157 if (ftdi->disconnected > 0) {
1158 return -ENODEV;
1159 }
1160 if (count == 0) {
1161 goto exit;
1162 }
1163 urb = usb_alloc_urb(0, GFP_KERNEL);
1164 if (!urb) {
1165 retval = -ENOMEM;
1166 goto error_1;
1167 }
1168 buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1169 &urb->transfer_dma);
1170 if (!buf) {
1171 retval = -ENOMEM;
1172 goto error_2;
1173 }
1174 if (copy_from_user(buf, user_buffer, count)) {
1175 retval = -EFAULT;
1176 goto error_3;
1177 }
1178 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1179 ftdi->bulk_out_endpointAddr), buf, count,
1180 ftdi_elan_write_bulk_callback, ftdi);
1181 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1182 retval = usb_submit_urb(urb, GFP_KERNEL);
1183 if (retval) {
1184 dev_err(&ftdi->udev->dev, "failed submitting write urb, error %"
1185 "d\n", retval);
1186 goto error_3;
1187 }
1188 usb_free_urb(urb);
1189
1190exit:
1191 return count;
1192error_3:
1193 usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1194error_2:
1195 usb_free_urb(urb);
1196error_1:
1197 return retval;
1198}
1199
1200static const struct file_operations ftdi_elan_fops = {
1201 .owner = THIS_MODULE,
1202 .llseek = no_llseek,
1203 .read = ftdi_elan_read,
1204 .write = ftdi_elan_write,
1205 .open = ftdi_elan_open,
1206 .release = ftdi_elan_release,
1207};
1208
1209/*
1210* usb class driver info in order to get a minor number from the usb core,
1211* and to have the device registered with the driver core
1212*/
1213static struct usb_class_driver ftdi_elan_jtag_class = {
1214 .name = "ftdi-%d-jtag",
1215 .fops = &ftdi_elan_fops,
1216 .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1217};
1218
1219/*
1220* the following definitions are for the
1221* ELAN FPGA state machgine processor that
1222* lies on the other side of the FTDI chip
1223*/
1224#define cPCIu132rd 0x0
1225#define cPCIu132wr 0x1
1226#define cPCIiord 0x2
1227#define cPCIiowr 0x3
1228#define cPCImemrd 0x6
1229#define cPCImemwr 0x7
1230#define cPCIcfgrd 0xA
1231#define cPCIcfgwr 0xB
1232#define cPCInull 0xF
1233#define cU132cmd_status 0x0
1234#define cU132flash 0x1
1235#define cPIDsetup 0x0
1236#define cPIDout 0x1
1237#define cPIDin 0x2
1238#define cPIDinonce 0x3
1239#define cCCnoerror 0x0
1240#define cCCcrc 0x1
1241#define cCCbitstuff 0x2
1242#define cCCtoggle 0x3
1243#define cCCstall 0x4
1244#define cCCnoresp 0x5
1245#define cCCbadpid1 0x6
1246#define cCCbadpid2 0x7
1247#define cCCdataoverrun 0x8
1248#define cCCdataunderrun 0x9
1249#define cCCbuffoverrun 0xC
1250#define cCCbuffunderrun 0xD
1251#define cCCnotaccessed 0xF
1252static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1253{
1254 wait:if (ftdi->disconnected > 0) {
1255 return -ENODEV;
1256 } else {
1257 int command_size;
1258 mutex_lock(&ftdi->u132_lock);
1259 command_size = ftdi->command_next - ftdi->command_head;
1260 if (command_size < COMMAND_SIZE) {
1261 struct u132_command *command = &ftdi->command[
1262 COMMAND_MASK & ftdi->command_next];
1263 command->header = 0x00 | cPCIu132wr;
1264 command->length = 0x04;
1265 command->address = 0x00;
1266 command->width = 0x00;
1267 command->follows = 4;
1268 command->value = data;
1269 command->buffer = &command->value;
1270 ftdi->command_next += 1;
1271 ftdi_elan_kick_command_queue(ftdi);
1272 mutex_unlock(&ftdi->u132_lock);
1273 return 0;
1274 } else {
1275 mutex_unlock(&ftdi->u132_lock);
1276 msleep(100);
1277 goto wait;
1278 }
1279 }
1280}
1281
1282static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1283 u8 width, u32 data)
1284{
1285 u8 addressofs = config_offset / 4;
1286 wait:if (ftdi->disconnected > 0) {
1287 return -ENODEV;
1288 } else {
1289 int command_size;
1290 mutex_lock(&ftdi->u132_lock);
1291 command_size = ftdi->command_next - ftdi->command_head;
1292 if (command_size < COMMAND_SIZE) {
1293 struct u132_command *command = &ftdi->command[
1294 COMMAND_MASK & ftdi->command_next];
1295 command->header = 0x00 | (cPCIcfgwr & 0x0F);
1296 command->length = 0x04;
1297 command->address = addressofs;
1298 command->width = 0x00 | (width & 0x0F);
1299 command->follows = 4;
1300 command->value = data;
1301 command->buffer = &command->value;
1302 ftdi->command_next += 1;
1303 ftdi_elan_kick_command_queue(ftdi);
1304 mutex_unlock(&ftdi->u132_lock);
1305 return 0;
1306 } else {
1307 mutex_unlock(&ftdi->u132_lock);
1308 msleep(100);
1309 goto wait;
1310 }
1311 }
1312}
1313
1314static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1315 u8 width, u32 data)
1316{
1317 u8 addressofs = mem_offset / 4;
1318 wait:if (ftdi->disconnected > 0) {
1319 return -ENODEV;
1320 } else {
1321 int command_size;
1322 mutex_lock(&ftdi->u132_lock);
1323 command_size = ftdi->command_next - ftdi->command_head;
1324 if (command_size < COMMAND_SIZE) {
1325 struct u132_command *command = &ftdi->command[
1326 COMMAND_MASK & ftdi->command_next];
1327 command->header = 0x00 | (cPCImemwr & 0x0F);
1328 command->length = 0x04;
1329 command->address = addressofs;
1330 command->width = 0x00 | (width & 0x0F);
1331 command->follows = 4;
1332 command->value = data;
1333 command->buffer = &command->value;
1334 ftdi->command_next += 1;
1335 ftdi_elan_kick_command_queue(ftdi);
1336 mutex_unlock(&ftdi->u132_lock);
1337 return 0;
1338 } else {
1339 mutex_unlock(&ftdi->u132_lock);
1340 msleep(100);
1341 goto wait;
1342 }
1343 }
1344}
1345
1346int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1347 u8 width, u32 data)
1348{
1349 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1350 return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1351}
1352
1353
1354EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1355static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1356{
1357 wait:if (ftdi->disconnected > 0) {
1358 return -ENODEV;
1359 } else {
1360 int command_size;
1361 int respond_size;
1362 mutex_lock(&ftdi->u132_lock);
1363 command_size = ftdi->command_next - ftdi->command_head;
1364 respond_size = ftdi->respond_next - ftdi->respond_head;
1365 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1366 {
1367 struct u132_command *command = &ftdi->command[
1368 COMMAND_MASK & ftdi->command_next];
1369 struct u132_respond *respond = &ftdi->respond[
1370 RESPOND_MASK & ftdi->respond_next];
1371 int result = -ENODEV;
1372 respond->result = &result;
1373 respond->header = command->header = 0x00 | cPCIu132rd;
1374 command->length = 0x04;
1375 respond->address = command->address = cU132cmd_status;
1376 command->width = 0x00;
1377 command->follows = 0;
1378 command->value = 0;
1379 command->buffer = NULL;
1380 respond->value = data;
1381 init_completion(&respond->wait_completion);
1382 ftdi->command_next += 1;
1383 ftdi->respond_next += 1;
1384 ftdi_elan_kick_command_queue(ftdi);
1385 mutex_unlock(&ftdi->u132_lock);
1386 wait_for_completion(&respond->wait_completion);
1387 return result;
1388 } else {
1389 mutex_unlock(&ftdi->u132_lock);
1390 msleep(100);
1391 goto wait;
1392 }
1393 }
1394}
1395
1396static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1397 u8 width, u32 *data)
1398{
1399 u8 addressofs = config_offset / 4;
1400 wait:if (ftdi->disconnected > 0) {
1401 return -ENODEV;
1402 } else {
1403 int command_size;
1404 int respond_size;
1405 mutex_lock(&ftdi->u132_lock);
1406 command_size = ftdi->command_next - ftdi->command_head;
1407 respond_size = ftdi->respond_next - ftdi->respond_head;
1408 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1409 {
1410 struct u132_command *command = &ftdi->command[
1411 COMMAND_MASK & ftdi->command_next];
1412 struct u132_respond *respond = &ftdi->respond[
1413 RESPOND_MASK & ftdi->respond_next];
1414 int result = -ENODEV;
1415 respond->result = &result;
1416 respond->header = command->header = 0x00 | (cPCIcfgrd &
1417 0x0F);
1418 command->length = 0x04;
1419 respond->address = command->address = addressofs;
1420 command->width = 0x00 | (width & 0x0F);
1421 command->follows = 0;
1422 command->value = 0;
1423 command->buffer = NULL;
1424 respond->value = data;
1425 init_completion(&respond->wait_completion);
1426 ftdi->command_next += 1;
1427 ftdi->respond_next += 1;
1428 ftdi_elan_kick_command_queue(ftdi);
1429 mutex_unlock(&ftdi->u132_lock);
1430 wait_for_completion(&respond->wait_completion);
1431 return result;
1432 } else {
1433 mutex_unlock(&ftdi->u132_lock);
1434 msleep(100);
1435 goto wait;
1436 }
1437 }
1438}
1439
1440static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1441 u8 width, u32 *data)
1442{
1443 u8 addressofs = mem_offset / 4;
1444 wait:if (ftdi->disconnected > 0) {
1445 return -ENODEV;
1446 } else {
1447 int command_size;
1448 int respond_size;
1449 mutex_lock(&ftdi->u132_lock);
1450 command_size = ftdi->command_next - ftdi->command_head;
1451 respond_size = ftdi->respond_next - ftdi->respond_head;
1452 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1453 {
1454 struct u132_command *command = &ftdi->command[
1455 COMMAND_MASK & ftdi->command_next];
1456 struct u132_respond *respond = &ftdi->respond[
1457 RESPOND_MASK & ftdi->respond_next];
1458 int result = -ENODEV;
1459 respond->result = &result;
1460 respond->header = command->header = 0x00 | (cPCImemrd &
1461 0x0F);
1462 command->length = 0x04;
1463 respond->address = command->address = addressofs;
1464 command->width = 0x00 | (width & 0x0F);
1465 command->follows = 0;
1466 command->value = 0;
1467 command->buffer = NULL;
1468 respond->value = data;
1469 init_completion(&respond->wait_completion);
1470 ftdi->command_next += 1;
1471 ftdi->respond_next += 1;
1472 ftdi_elan_kick_command_queue(ftdi);
1473 mutex_unlock(&ftdi->u132_lock);
1474 wait_for_completion(&respond->wait_completion);
1475 return result;
1476 } else {
1477 mutex_unlock(&ftdi->u132_lock);
1478 msleep(100);
1479 goto wait;
1480 }
1481 }
1482}
1483
1484int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1485 u8 width, u32 *data)
1486{
1487 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1488 if (ftdi->initialized == 0) {
1489 return -ENODEV;
1490 } else
1491 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1492}
1493
1494
1495EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1496static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1497 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1498 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1499 int toggle_bits, int error_count, int condition_code, int repeat_number,
1500 int halted, int skipped, int actual, int non_null))
1501{
1502 u8 ed = ed_number - 1;
1503 wait:if (ftdi->disconnected > 0) {
1504 return -ENODEV;
1505 } else if (ftdi->initialized == 0) {
1506 return -ENODEV;
1507 } else {
1508 int command_size;
1509 mutex_lock(&ftdi->u132_lock);
1510 command_size = ftdi->command_next - ftdi->command_head;
1511 if (command_size < COMMAND_SIZE) {
1512 struct u132_target *target = &ftdi->target[ed];
1513 struct u132_command *command = &ftdi->command[
1514 COMMAND_MASK & ftdi->command_next];
1515 command->header = 0x80 | (ed << 5);
1516 command->length = 0x8007;
1517 command->address = (toggle_bits << 6) | (ep_number << 2)
1518 | (address << 0);
1519 command->width = usb_maxpacket(urb->dev, urb->pipe,
1520 usb_pipeout(urb->pipe));
1521 command->follows = 8;
1522 command->value = 0;
1523 command->buffer = urb->setup_packet;
1524 target->callback = callback;
1525 target->endp = endp;
1526 target->urb = urb;
1527 target->active = 1;
1528 ftdi->command_next += 1;
1529 ftdi_elan_kick_command_queue(ftdi);
1530 mutex_unlock(&ftdi->u132_lock);
1531 return 0;
1532 } else {
1533 mutex_unlock(&ftdi->u132_lock);
1534 msleep(100);
1535 goto wait;
1536 }
1537 }
1538}
1539
1540int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1541 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1542 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1543 int toggle_bits, int error_count, int condition_code, int repeat_number,
1544 int halted, int skipped, int actual, int non_null))
1545{
1546 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1547 return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1548 ep_number, toggle_bits, callback);
1549}
1550
1551
1552EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1553static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1554 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1555 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1556 int toggle_bits, int error_count, int condition_code, int repeat_number,
1557 int halted, int skipped, int actual, int non_null))
1558{
1559 u8 ed = ed_number - 1;
1560 wait:if (ftdi->disconnected > 0) {
1561 return -ENODEV;
1562 } else if (ftdi->initialized == 0) {
1563 return -ENODEV;
1564 } else {
1565 int command_size;
1566 mutex_lock(&ftdi->u132_lock);
1567 command_size = ftdi->command_next - ftdi->command_head;
1568 if (command_size < COMMAND_SIZE) {
1569 struct u132_target *target = &ftdi->target[ed];
1570 struct u132_command *command = &ftdi->command[
1571 COMMAND_MASK & ftdi->command_next];
1572 u32 remaining_length = urb->transfer_buffer_length -
1573 urb->actual_length;
1574 command->header = 0x82 | (ed << 5);
1575 if (remaining_length == 0) {
1576 command->length = 0x0000;
1577 } else if (remaining_length > 1024) {
1578 command->length = 0x8000 | 1023;
1579 } else
1580 command->length = 0x8000 | (remaining_length -
1581 1);
1582 command->address = (toggle_bits << 6) | (ep_number << 2)
1583 | (address << 0);
1584 command->width = usb_maxpacket(urb->dev, urb->pipe,
1585 usb_pipeout(urb->pipe));
1586 command->follows = 0;
1587 command->value = 0;
1588 command->buffer = NULL;
1589 target->callback = callback;
1590 target->endp = endp;
1591 target->urb = urb;
1592 target->active = 1;
1593 ftdi->command_next += 1;
1594 ftdi_elan_kick_command_queue(ftdi);
1595 mutex_unlock(&ftdi->u132_lock);
1596 return 0;
1597 } else {
1598 mutex_unlock(&ftdi->u132_lock);
1599 msleep(100);
1600 goto wait;
1601 }
1602 }
1603}
1604
1605int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1606 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1607 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1608 int toggle_bits, int error_count, int condition_code, int repeat_number,
1609 int halted, int skipped, int actual, int non_null))
1610{
1611 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1612 return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1613 ep_number, toggle_bits, callback);
1614}
1615
1616
1617EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1618static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1619 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1620 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1621 int toggle_bits, int error_count, int condition_code, int repeat_number,
1622 int halted, int skipped, int actual, int non_null))
1623{
1624 u8 ed = ed_number - 1;
1625 wait:if (ftdi->disconnected > 0) {
1626 return -ENODEV;
1627 } else if (ftdi->initialized == 0) {
1628 return -ENODEV;
1629 } else {
1630 int command_size;
1631 mutex_lock(&ftdi->u132_lock);
1632 command_size = ftdi->command_next - ftdi->command_head;
1633 if (command_size < COMMAND_SIZE) {
1634 struct u132_target *target = &ftdi->target[ed];
1635 struct u132_command *command = &ftdi->command[
1636 COMMAND_MASK & ftdi->command_next];
1637 command->header = 0x81 | (ed << 5);
1638 command->length = 0x0000;
1639 command->address = (toggle_bits << 6) | (ep_number << 2)
1640 | (address << 0);
1641 command->width = usb_maxpacket(urb->dev, urb->pipe,
1642 usb_pipeout(urb->pipe));
1643 command->follows = 0;
1644 command->value = 0;
1645 command->buffer = NULL;
1646 target->callback = callback;
1647 target->endp = endp;
1648 target->urb = urb;
1649 target->active = 1;
1650 ftdi->command_next += 1;
1651 ftdi_elan_kick_command_queue(ftdi);
1652 mutex_unlock(&ftdi->u132_lock);
1653 return 0;
1654 } else {
1655 mutex_unlock(&ftdi->u132_lock);
1656 msleep(100);
1657 goto wait;
1658 }
1659 }
1660}
1661
1662int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1663 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1664 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1665 int toggle_bits, int error_count, int condition_code, int repeat_number,
1666 int halted, int skipped, int actual, int non_null))
1667{
1668 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1669 return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1670 ep_number, toggle_bits, callback);
1671}
1672
1673
1674EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1675static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1676 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1677 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1678 int toggle_bits, int error_count, int condition_code, int repeat_number,
1679 int halted, int skipped, int actual, int non_null))
1680{
1681 u8 ed = ed_number - 1;
1682 wait:if (ftdi->disconnected > 0) {
1683 return -ENODEV;
1684 } else if (ftdi->initialized == 0) {
1685 return -ENODEV;
1686 } else {
1687 int command_size;
1688 mutex_lock(&ftdi->u132_lock);
1689 command_size = ftdi->command_next - ftdi->command_head;
1690 if (command_size < COMMAND_SIZE) {
1691 u8 *b;
1692 u16 urb_size;
1693 int i = 0;
1694 char data[30 *3 + 4];
1695 char *d = data;
1696 int m = (sizeof(data) - 1) / 3;
1697 int l = 0;
1698 struct u132_target *target = &ftdi->target[ed];
1699 struct u132_command *command = &ftdi->command[
1700 COMMAND_MASK & ftdi->command_next];
1701 command->header = 0x81 | (ed << 5);
1702 command->address = (toggle_bits << 6) | (ep_number << 2)
1703 | (address << 0);
1704 command->width = usb_maxpacket(urb->dev, urb->pipe,
1705 usb_pipeout(urb->pipe));
1706 command->follows = min_t(u32, 1024,
1707 urb->transfer_buffer_length -
1708 urb->actual_length);
1709 command->value = 0;
1710 command->buffer = urb->transfer_buffer +
1711 urb->actual_length;
1712 command->length = 0x8000 | (command->follows - 1);
1713 b = command->buffer;
1714 urb_size = command->follows;
1715 data[0] = 0;
1716 while (urb_size-- > 0) {
1717 if (i > m) {
1718 } else if (i++ < m) {
1719 int w = sprintf(d, " %02X", *b++);
1720 d += w;
1721 l += w;
1722 } else
1723 d += sprintf(d, " ..");
1724 }
1725 target->callback = callback;
1726 target->endp = endp;
1727 target->urb = urb;
1728 target->active = 1;
1729 ftdi->command_next += 1;
1730 ftdi_elan_kick_command_queue(ftdi);
1731 mutex_unlock(&ftdi->u132_lock);
1732 return 0;
1733 } else {
1734 mutex_unlock(&ftdi->u132_lock);
1735 msleep(100);
1736 goto wait;
1737 }
1738 }
1739}
1740
1741int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1742 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1743 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1744 int toggle_bits, int error_count, int condition_code, int repeat_number,
1745 int halted, int skipped, int actual, int non_null))
1746{
1747 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1748 return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1749 ep_number, toggle_bits, callback);
1750}
1751
1752
1753EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1754static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1755 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1756 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1757 int toggle_bits, int error_count, int condition_code, int repeat_number,
1758 int halted, int skipped, int actual, int non_null))
1759{
1760 u8 ed = ed_number - 1;
1761 wait:if (ftdi->disconnected > 0) {
1762 return -ENODEV;
1763 } else if (ftdi->initialized == 0) {
1764 return -ENODEV;
1765 } else {
1766 int command_size;
1767 mutex_lock(&ftdi->u132_lock);
1768 command_size = ftdi->command_next - ftdi->command_head;
1769 if (command_size < COMMAND_SIZE) {
1770 u32 remaining_length = urb->transfer_buffer_length -
1771 urb->actual_length;
1772 struct u132_target *target = &ftdi->target[ed];
1773 struct u132_command *command = &ftdi->command[
1774 COMMAND_MASK & ftdi->command_next];
1775 command->header = 0x83 | (ed << 5);
1776 if (remaining_length == 0) {
1777 command->length = 0x0000;
1778 } else if (remaining_length > 1024) {
1779 command->length = 0x8000 | 1023;
1780 } else
1781 command->length = 0x8000 | (remaining_length -
1782 1);
1783 command->address = (toggle_bits << 6) | (ep_number << 2)
1784 | (address << 0);
1785 command->width = usb_maxpacket(urb->dev, urb->pipe,
1786 usb_pipeout(urb->pipe));
1787 command->follows = 0;
1788 command->value = 0;
1789 command->buffer = NULL;
1790 target->callback = callback;
1791 target->endp = endp;
1792 target->urb = urb;
1793 target->active = 1;
1794 ftdi->command_next += 1;
1795 ftdi_elan_kick_command_queue(ftdi);
1796 mutex_unlock(&ftdi->u132_lock);
1797 return 0;
1798 } else {
1799 mutex_unlock(&ftdi->u132_lock);
1800 msleep(100);
1801 goto wait;
1802 }
1803 }
1804}
1805
1806int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1807 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1808 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1809 int toggle_bits, int error_count, int condition_code, int repeat_number,
1810 int halted, int skipped, int actual, int non_null))
1811{
1812 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1813 return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1814 ep_number, toggle_bits, callback);
1815}
1816
1817
1818EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1819static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1820 void *endp)
1821{
1822 u8 ed = ed_number - 1;
1823 if (ftdi->disconnected > 0) {
1824 return -ENODEV;
1825 } else if (ftdi->initialized == 0) {
1826 return -ENODEV;
1827 } else {
1828 struct u132_target *target = &ftdi->target[ed];
1829 mutex_lock(&ftdi->u132_lock);
1830 if (target->abandoning > 0) {
1831 mutex_unlock(&ftdi->u132_lock);
1832 return 0;
1833 } else {
1834 target->abandoning = 1;
1835 wait_1:if (target->active == 1) {
1836 int command_size = ftdi->command_next -
1837 ftdi->command_head;
1838 if (command_size < COMMAND_SIZE) {
1839 struct u132_command *command =
1840 &ftdi->command[COMMAND_MASK &
1841 ftdi->command_next];
1842 command->header = 0x80 | (ed << 5) |
1843 0x4;
1844 command->length = 0x00;
1845 command->address = 0x00;
1846 command->width = 0x00;
1847 command->follows = 0;
1848 command->value = 0;
1849 command->buffer = &command->value;
1850 ftdi->command_next += 1;
1851 ftdi_elan_kick_command_queue(ftdi);
1852 } else {
1853 mutex_unlock(&ftdi->u132_lock);
1854 msleep(100);
1855 mutex_lock(&ftdi->u132_lock);
1856 goto wait_1;
1857 }
1858 }
1859 mutex_unlock(&ftdi->u132_lock);
1860 return 0;
1861 }
1862 }
1863}
1864
1865int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1866 void *endp)
1867{
1868 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1869 return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1870}
1871
1872
1873EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1874static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1875{
1876 int retry_on_empty = 10;
1877 int retry_on_timeout = 5;
1878 int retry_on_status = 20;
1879 more:{
1880 int packet_bytes = 0;
1881 int retval = usb_bulk_msg(ftdi->udev,
1882 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1883 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1884 &packet_bytes, 100);
1885 if (packet_bytes > 2) {
1886 char diag[30 *3 + 4];
1887 char *d = diag;
1888 int m = (sizeof(diag) - 1) / 3;
1889 char *b = ftdi->bulk_in_buffer;
1890 int bytes_read = 0;
1891 diag[0] = 0;
1892 while (packet_bytes-- > 0) {
1893 char c = *b++;
1894 if (bytes_read < m) {
1895 d += sprintf(d, " %02X",
1896 0x000000FF & c);
1897 } else if (bytes_read > m) {
1898 } else
1899 d += sprintf(d, " ..");
1900 bytes_read += 1;
1901 continue;
1902 }
1903 goto more;
1904 } else if (packet_bytes > 1) {
1905 char s1 = ftdi->bulk_in_buffer[0];
1906 char s2 = ftdi->bulk_in_buffer[1];
1907 if (s1 == 0x31 && s2 == 0x60) {
1908 return 0;
1909 } else if (retry_on_status-- > 0) {
1910 goto more;
1911 } else {
1912 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1913 "imit reached\n");
1914 return -EFAULT;
1915 }
1916 } else if (packet_bytes > 0) {
1917 char b1 = ftdi->bulk_in_buffer[0];
1918 dev_err(&ftdi->udev->dev, "only one byte flushed from F"
1919 "TDI = %02X\n", b1);
1920 if (retry_on_status-- > 0) {
1921 goto more;
1922 } else {
1923 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1924 "imit reached\n");
1925 return -EFAULT;
1926 }
1927 } else if (retval == -ETIMEDOUT) {
1928 if (retry_on_timeout-- > 0) {
1929 goto more;
1930 } else {
1931 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
1932 "t reached\n");
1933 return -ENOMEM;
1934 }
1935 } else if (retval == 0) {
1936 if (retry_on_empty-- > 0) {
1937 goto more;
1938 } else {
1939 dev_err(&ftdi->udev->dev, "empty packet retry l"
1940 "imit reached\n");
1941 return -ENOMEM;
1942 }
1943 } else {
1944 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1945 return retval;
1946 }
1947 }
1948 return -1;
1949}
1950
1951
1952/*
1953* send the long flush sequence
1954*
1955*/
1956static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1957{
1958 int retval;
1959 struct urb *urb;
1960 char *buf;
1961 int I = 257;
1962 int i = 0;
1963 urb = usb_alloc_urb(0, GFP_KERNEL);
1964 if (!urb) {
1965 dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequ"
1966 "ence\n");
1967 return -ENOMEM;
1968 }
1969 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1970 if (!buf) {
1971 dev_err(&ftdi->udev->dev, "could not get a buffer for flush seq"
1972 "uence\n");
1973 usb_free_urb(urb);
1974 return -ENOMEM;
1975 }
1976 while (I-- > 0)
1977 buf[i++] = 0x55;
1978 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1979 ftdi->bulk_out_endpointAddr), buf, i,
1980 ftdi_elan_write_bulk_callback, ftdi);
1981 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1982 retval = usb_submit_urb(urb, GFP_KERNEL);
1983 if (retval) {
1984 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
1985 "flush sequence\n");
1986 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1987 usb_free_urb(urb);
1988 return -ENOMEM;
1989 }
1990 usb_free_urb(urb);
1991 return 0;
1992}
1993
1994
1995/*
1996* send the reset sequence
1997*
1998*/
1999static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
2000{
2001 int retval;
2002 struct urb *urb;
2003 char *buf;
2004 int I = 4;
2005 int i = 0;
2006 urb = usb_alloc_urb(0, GFP_KERNEL);
2007 if (!urb) {
2008 dev_err(&ftdi->udev->dev, "could not get a urb for the reset se"
2009 "quence\n");
2010 return -ENOMEM;
2011 }
2012 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
2013 if (!buf) {
2014 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset"
2015 " sequence\n");
2016 usb_free_urb(urb);
2017 return -ENOMEM;
2018 }
2019 buf[i++] = 0x55;
2020 buf[i++] = 0xAA;
2021 buf[i++] = 0x5A;
2022 buf[i++] = 0xA5;
2023 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2024 ftdi->bulk_out_endpointAddr), buf, i,
2025 ftdi_elan_write_bulk_callback, ftdi);
2026 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2027 retval = usb_submit_urb(urb, GFP_KERNEL);
2028 if (retval) {
2029 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
2030 "reset sequence\n");
2031 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
2032 usb_free_urb(urb);
2033 return -ENOMEM;
2034 }
2035 usb_free_urb(urb);
2036 return 0;
2037}
2038
2039static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2040{
2041 int retval;
2042 int long_stop = 10;
2043 int retry_on_timeout = 5;
2044 int retry_on_empty = 10;
2045 int err_count = 0;
2046 retval = ftdi_elan_flush_input_fifo(ftdi);
2047 if (retval)
2048 return retval;
2049 ftdi->bulk_in_left = 0;
2050 ftdi->bulk_in_last = -1;
2051 while (long_stop-- > 0) {
2052 int read_stop;
2053 int read_stuck;
2054 retval = ftdi_elan_synchronize_flush(ftdi);
2055 if (retval)
2056 return retval;
2057 retval = ftdi_elan_flush_input_fifo(ftdi);
2058 if (retval)
2059 return retval;
2060 reset:retval = ftdi_elan_synchronize_reset(ftdi);
2061 if (retval)
2062 return retval;
2063 read_stop = 100;
2064 read_stuck = 10;
2065 read:{
2066 int packet_bytes = 0;
2067 retval = usb_bulk_msg(ftdi->udev,
2068 usb_rcvbulkpipe(ftdi->udev,
2069 ftdi->bulk_in_endpointAddr),
2070 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2071 &packet_bytes, 500);
2072 if (packet_bytes > 2) {
2073 char diag[30 *3 + 4];
2074 char *d = diag;
2075 int m = (sizeof(diag) - 1) / 3;
2076 char *b = ftdi->bulk_in_buffer;
2077 int bytes_read = 0;
2078 unsigned char c = 0;
2079 diag[0] = 0;
2080 while (packet_bytes-- > 0) {
2081 c = *b++;
2082 if (bytes_read < m) {
2083 d += sprintf(d, " %02X", c);
2084 } else if (bytes_read > m) {
2085 } else
2086 d += sprintf(d, " ..");
2087 bytes_read += 1;
2088 continue;
2089 }
2090 if (c == 0x7E) {
2091 return 0;
2092 } else {
2093 if (c == 0x55) {
2094 goto read;
2095 } else if (read_stop-- > 0) {
2096 goto read;
2097 } else {
2098 dev_err(&ftdi->udev->dev, "retr"
2099 "y limit reached\n");
2100 continue;
2101 }
2102 }
2103 } else if (packet_bytes > 1) {
2104 unsigned char s1 = ftdi->bulk_in_buffer[0];
2105 unsigned char s2 = ftdi->bulk_in_buffer[1];
2106 if (s1 == 0x31 && s2 == 0x00) {
2107 if (read_stuck-- > 0) {
2108 goto read;
2109 } else
2110 goto reset;
2111 } else if (s1 == 0x31 && s2 == 0x60) {
2112 if (read_stop-- > 0) {
2113 goto read;
2114 } else {
2115 dev_err(&ftdi->udev->dev, "retr"
2116 "y limit reached\n");
2117 continue;
2118 }
2119 } else {
2120 if (read_stop-- > 0) {
2121 goto read;
2122 } else {
2123 dev_err(&ftdi->udev->dev, "retr"
2124 "y limit reached\n");
2125 continue;
2126 }
2127 }
2128 } else if (packet_bytes > 0) {
2129 if (read_stop-- > 0) {
2130 goto read;
2131 } else {
2132 dev_err(&ftdi->udev->dev, "retry limit "
2133 "reached\n");
2134 continue;
2135 }
2136 } else if (retval == -ETIMEDOUT) {
2137 if (retry_on_timeout-- > 0) {
2138 goto read;
2139 } else {
2140 dev_err(&ftdi->udev->dev, "TIMED OUT re"
2141 "try limit reached\n");
2142 continue;
2143 }
2144 } else if (retval == 0) {
2145 if (retry_on_empty-- > 0) {
2146 goto read;
2147 } else {
2148 dev_err(&ftdi->udev->dev, "empty packet"
2149 " retry limit reached\n");
2150 continue;
2151 }
2152 } else {
2153 err_count += 1;
2154 dev_err(&ftdi->udev->dev, "error = %d\n",
2155 retval);
2156 if (read_stop-- > 0) {
2157 goto read;
2158 } else {
2159 dev_err(&ftdi->udev->dev, "retry limit "
2160 "reached\n");
2161 continue;
2162 }
2163 }
2164 }
2165 }
2166 dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2167 return -EFAULT;
2168}
2169
2170static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2171{
2172 int retry_on_empty = 10;
2173 int retry_on_timeout = 5;
2174 int retry_on_status = 50;
2175 more:{
2176 int packet_bytes = 0;
2177 int retval = usb_bulk_msg(ftdi->udev,
2178 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2179 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2180 &packet_bytes, 1000);
2181 if (packet_bytes > 2) {
2182 char diag[30 *3 + 4];
2183 char *d = diag;
2184 int m = (sizeof(diag) - 1) / 3;
2185 char *b = ftdi->bulk_in_buffer;
2186 int bytes_read = 0;
2187 diag[0] = 0;
2188 while (packet_bytes-- > 0) {
2189 char c = *b++;
2190 if (bytes_read < m) {
2191 d += sprintf(d, " %02X",
2192 0x000000FF & c);
2193 } else if (bytes_read > m) {
2194 } else
2195 d += sprintf(d, " ..");
2196 bytes_read += 1;
2197 continue;
2198 }
2199 goto more;
2200 } else if (packet_bytes > 1) {
2201 char s1 = ftdi->bulk_in_buffer[0];
2202 char s2 = ftdi->bulk_in_buffer[1];
2203 if (s1 == 0x31 && s2 == 0x60) {
2204 return 0;
2205 } else if (retry_on_status-- > 0) {
2206 msleep(5);
2207 goto more;
2208 } else
2209 return -EFAULT;
2210 } else if (packet_bytes > 0) {
2211 char b1 = ftdi->bulk_in_buffer[0];
2212 dev_err(&ftdi->udev->dev, "only one byte flushed from F"
2213 "TDI = %02X\n", b1);
2214 if (retry_on_status-- > 0) {
2215 msleep(5);
2216 goto more;
2217 } else {
2218 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
2219 "imit reached\n");
2220 return -EFAULT;
2221 }
2222 } else if (retval == -ETIMEDOUT) {
2223 if (retry_on_timeout-- > 0) {
2224 goto more;
2225 } else {
2226 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
2227 "t reached\n");
2228 return -ENOMEM;
2229 }
2230 } else if (retval == 0) {
2231 if (retry_on_empty-- > 0) {
2232 goto more;
2233 } else {
2234 dev_err(&ftdi->udev->dev, "empty packet retry l"
2235 "imit reached\n");
2236 return -ENOMEM;
2237 }
2238 } else {
2239 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2240 return -ENOMEM;
2241 }
2242 }
2243 return -1;
2244}
2245
2246static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2247{
2248 int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2249 if (UxxxStatus)
2250 return UxxxStatus;
2251 if (ftdi->controlreg & 0x00400000) {
2252 if (ftdi->card_ejected) {
2253 } else {
2254 ftdi->card_ejected = 1;
2255 dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = "
2256 "%08X\n", ftdi->controlreg);
2257 }
2258 return -ENODEV;
2259 } else {
2260 u8 fn = ftdi->function - 1;
2261 int activePCIfn = fn << 8;
2262 u32 pcidata;
2263 u32 pciVID;
2264 u32 pciPID;
2265 int reg = 0;
2266 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2267 &pcidata);
2268 if (UxxxStatus)
2269 return UxxxStatus;
2270 pciVID = pcidata & 0xFFFF;
2271 pciPID = (pcidata >> 16) & 0xFFFF;
2272 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2273 ftdi->platform_data.device) {
2274 return 0;
2275 } else {
2276 dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X devi"
2277 "ce=%04X pciPID=%04X\n",
2278 ftdi->platform_data.vendor, pciVID,
2279 ftdi->platform_data.device, pciPID);
2280 return -ENODEV;
2281 }
2282 }
2283}
2284
2285
2286#define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2287 offsetof(struct ohci_regs, member), 0, data);
2288#define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2289 offsetof(struct ohci_regs, member), 0, data);
2290
2291#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2292#define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2293 OHCI_INTR_WDH)
2294static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2295{
2296 int devices = 0;
2297 int retval;
2298 u32 hc_control;
2299 int num_ports;
2300 u32 control;
2301 u32 rh_a = -1;
2302 u32 status;
2303 u32 fminterval;
2304 u32 hc_fminterval;
2305 u32 periodicstart;
2306 u32 cmdstatus;
2307 u32 roothub_a;
2308 int mask = OHCI_INTR_INIT;
2309 int sleep_time = 0;
2310 int reset_timeout = 30; /* ... allow extra time */
2311 int temp;
2312 retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2313 if (retval)
2314 return retval;
2315 retval = ftdi_read_pcimem(ftdi, control, &control);
2316 if (retval)
2317 return retval;
2318 retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2319 if (retval)
2320 return retval;
2321 num_ports = rh_a & RH_A_NDP;
2322 retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2323 if (retval)
2324 return retval;
2325 hc_fminterval &= 0x3fff;
2326 if (hc_fminterval != FI) {
2327 }
2328 hc_fminterval |= FSMP(hc_fminterval) << 16;
2329 retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2330 if (retval)
2331 return retval;
2332 switch (hc_control & OHCI_CTRL_HCFS) {
2333 case OHCI_USB_OPER:
2334 sleep_time = 0;
2335 break;
2336 case OHCI_USB_SUSPEND:
2337 case OHCI_USB_RESUME:
2338 hc_control &= OHCI_CTRL_RWC;
2339 hc_control |= OHCI_USB_RESUME;
2340 sleep_time = 10;
2341 break;
2342 default:
2343 hc_control &= OHCI_CTRL_RWC;
2344 hc_control |= OHCI_USB_RESET;
2345 sleep_time = 50;
2346 break;
2347 }
2348 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2349 if (retval)
2350 return retval;
2351 retval = ftdi_read_pcimem(ftdi, control, &control);
2352 if (retval)
2353 return retval;
2354 msleep(sleep_time);
2355 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2356 if (retval)
2357 return retval;
2358 if (!(roothub_a & RH_A_NPS)) { /* power down each port */
2359 for (temp = 0; temp < num_ports; temp++) {
2360 retval = ftdi_write_pcimem(ftdi,
2361 roothub.portstatus[temp], RH_PS_LSDA);
2362 if (retval)
2363 return retval;
2364 }
2365 }
2366 retval = ftdi_read_pcimem(ftdi, control, &control);
2367 if (retval)
2368 return retval;
2369 retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2370 if (retval)
2371 return retval;
2372 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2373 if (retval)
2374 return retval;
2375 extra:{
2376 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2377 if (retval)
2378 return retval;
2379 if (0 != (status & OHCI_HCR)) {
2380 if (--reset_timeout == 0) {
2381 dev_err(&ftdi->udev->dev, "USB HC reset timed o"
2382 "ut!\n");
2383 return -ENODEV;
2384 } else {
2385 msleep(5);
2386 goto extra;
2387 }
2388 }
2389 }
2390 if (quirk & OHCI_QUIRK_INITRESET) {
2391 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2392 if (retval)
2393 return retval;
2394 retval = ftdi_read_pcimem(ftdi, control, &control);
2395 if (retval)
2396 return retval;
2397 }
2398 retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2399 if (retval)
2400 return retval;
2401 retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2402 if (retval)
2403 return retval;
2404 retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2405 if (retval)
2406 return retval;
2407 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2408 if (retval)
2409 return retval;
2410 retval = ftdi_write_pcimem(ftdi, fminterval,
2411 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2412 if (retval)
2413 return retval;
2414 retval = ftdi_write_pcimem(ftdi, periodicstart,
2415 ((9 *hc_fminterval) / 10) & 0x3fff);
2416 if (retval)
2417 return retval;
2418 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2419 if (retval)
2420 return retval;
2421 retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2422 if (retval)
2423 return retval;
2424 if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2425 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2426 quirk |= OHCI_QUIRK_INITRESET;
2427 goto retry;
2428 } else
2429 dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2430 fminterval, periodicstart);
2431 } /* start controller operations */
2432 hc_control &= OHCI_CTRL_RWC;
2433 hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2434 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2435 if (retval)
2436 return retval;
2437 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2438 if (retval)
2439 return retval;
2440 retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2441 if (retval)
2442 return retval;
2443 retval = ftdi_read_pcimem(ftdi, control, &control);
2444 if (retval)
2445 return retval;
2446 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2447 if (retval)
2448 return retval;
2449 retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2450 if (retval)
2451 return retval;
2452 retval = ftdi_write_pcimem(ftdi, intrdisable,
2453 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2454 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2455 OHCI_INTR_SO);
2456 if (retval)
2457 return retval; /* handle root hub init quirks ... */
2458 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2459 if (retval)
2460 return retval;
2461 roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2462 if (quirk & OHCI_QUIRK_SUPERIO) {
2463 roothub_a |= RH_A_NOCP;
2464 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2465 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2466 if (retval)
2467 return retval;
2468 } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2469 roothub_a |= RH_A_NPS;
2470 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2471 if (retval)
2472 return retval;
2473 }
2474 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2475 if (retval)
2476 return retval;
2477 retval = ftdi_write_pcimem(ftdi, roothub.b,
2478 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2479 if (retval)
2480 return retval;
2481 retval = ftdi_read_pcimem(ftdi, control, &control);
2482 if (retval)
2483 return retval;
2484 mdelay((roothub_a >> 23) & 0x1fe);
2485 for (temp = 0; temp < num_ports; temp++) {
2486 u32 portstatus;
2487 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2488 &portstatus);
2489 if (retval)
2490 return retval;
2491 if (1 & portstatus)
2492 devices += 1;
2493 }
2494 return devices;
2495}
2496
2497static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2498{
2499 u32 latence_timer;
2500 int UxxxStatus;
2501 u32 pcidata;
2502 int reg = 0;
2503 int activePCIfn = fn << 8;
2504 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2505 if (UxxxStatus)
2506 return UxxxStatus;
2507 reg = 16;
2508 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2509 0xFFFFFFFF);
2510 if (UxxxStatus)
2511 return UxxxStatus;
2512 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2513 &pcidata);
2514 if (UxxxStatus)
2515 return UxxxStatus;
2516 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2517 0xF0000000);
2518 if (UxxxStatus)
2519 return UxxxStatus;
2520 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2521 &pcidata);
2522 if (UxxxStatus)
2523 return UxxxStatus;
2524 reg = 12;
2525 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2526 &latence_timer);
2527 if (UxxxStatus)
2528 return UxxxStatus;
2529 latence_timer &= 0xFFFF00FF;
2530 latence_timer |= 0x00001600;
2531 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2532 latence_timer);
2533 if (UxxxStatus)
2534 return UxxxStatus;
2535 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2536 &pcidata);
2537 if (UxxxStatus)
2538 return UxxxStatus;
2539 reg = 4;
2540 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2541 0x06);
2542 if (UxxxStatus)
2543 return UxxxStatus;
2544 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2545 &pcidata);
2546 if (UxxxStatus)
2547 return UxxxStatus;
2548 for (reg = 0; reg <= 0x54; reg += 4) {
2549 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2550 if (UxxxStatus)
2551 return UxxxStatus;
2552 }
2553 return 0;
2554}
2555
2556static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2557{
2558 u32 latence_timer;
2559 int UxxxStatus;
2560 u32 pcidata;
2561 int reg = 0;
2562 int activePCIfn = fn << 8;
2563 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2564 if (UxxxStatus)
2565 return UxxxStatus;
2566 reg = 16;
2567 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2568 0xFFFFFFFF);
2569 if (UxxxStatus)
2570 return UxxxStatus;
2571 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2572 &pcidata);
2573 if (UxxxStatus)
2574 return UxxxStatus;
2575 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2576 0x00000000);
2577 if (UxxxStatus)
2578 return UxxxStatus;
2579 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2580 &pcidata);
2581 if (UxxxStatus)
2582 return UxxxStatus;
2583 reg = 12;
2584 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2585 &latence_timer);
2586 if (UxxxStatus)
2587 return UxxxStatus;
2588 latence_timer &= 0xFFFF00FF;
2589 latence_timer |= 0x00001600;
2590 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2591 latence_timer);
2592 if (UxxxStatus)
2593 return UxxxStatus;
2594 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2595 &pcidata);
2596 if (UxxxStatus)
2597 return UxxxStatus;
2598 reg = 4;
2599 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2600 0x00);
2601 if (UxxxStatus)
2602 return UxxxStatus;
2603 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2604 &pcidata);
2605 if (UxxxStatus)
2606 return UxxxStatus;
2607 return 0;
2608}
2609
2610static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2611{
2612 int result;
2613 int UxxxStatus;
2614 UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2615 if (UxxxStatus)
2616 return UxxxStatus;
2617 result = ftdi_elan_check_controller(ftdi, quirk);
2618 UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2619 if (UxxxStatus)
2620 return UxxxStatus;
2621 return result;
2622}
2623
2624static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2625{
2626 u32 controlreg;
2627 u8 sensebits;
2628 int UxxxStatus;
2629 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2630 if (UxxxStatus)
2631 return UxxxStatus;
2632 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2633 if (UxxxStatus)
2634 return UxxxStatus;
2635 msleep(750);
2636 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2637 if (UxxxStatus)
2638 return UxxxStatus;
2639 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2640 if (UxxxStatus)
2641 return UxxxStatus;
2642 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2643 if (UxxxStatus)
2644 return UxxxStatus;
2645 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2646 if (UxxxStatus)
2647 return UxxxStatus;
2648 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2649 if (UxxxStatus)
2650 return UxxxStatus;
2651 msleep(250);
2652 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2653 if (UxxxStatus)
2654 return UxxxStatus;
2655 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2656 if (UxxxStatus)
2657 return UxxxStatus;
2658 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2659 if (UxxxStatus)
2660 return UxxxStatus;
2661 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2662 if (UxxxStatus)
2663 return UxxxStatus;
2664 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2665 if (UxxxStatus)
2666 return UxxxStatus;
2667 msleep(1000);
2668 sensebits = (controlreg >> 16) & 0x000F;
2669 if (0x0D == sensebits)
2670 return 0;
2671 else
2672 return - ENXIO;
2673}
2674
2675static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2676{
2677 int UxxxStatus;
2678 u32 pcidata;
2679 int reg = 0;
2680 u8 fn;
2681 int activePCIfn = 0;
2682 int max_devices = 0;
2683 int controllers = 0;
2684 int unrecognized = 0;
2685 ftdi->function = 0;
2686 for (fn = 0; (fn < 4); fn++) {
2687 u32 pciVID = 0;
2688 u32 pciPID = 0;
2689 int devices = 0;
2690 activePCIfn = fn << 8;
2691 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2692 &pcidata);
2693 if (UxxxStatus)
2694 return UxxxStatus;
2695 pciVID = pcidata & 0xFFFF;
2696 pciPID = (pcidata >> 16) & 0xFFFF;
2697 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2698 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2699 controllers += 1;
2700 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2701 {
2702 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2703 controllers += 1;
2704 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2705 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2706 controllers += 1;
2707 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2708 {
2709 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2710 controllers += 1;
2711 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2712 devices = ftdi_elan_found_controller(ftdi, fn,
2713 OHCI_QUIRK_AMD756);
2714 controllers += 1;
2715 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2716 devices = ftdi_elan_found_controller(ftdi, fn,
2717 OHCI_QUIRK_ZFMICRO);
2718 controllers += 1;
2719 } else if (0 == pcidata) {
2720 } else
2721 unrecognized += 1;
2722 if (devices > max_devices) {
2723 max_devices = devices;
2724 ftdi->function = fn + 1;
2725 ftdi->platform_data.vendor = pciVID;
2726 ftdi->platform_data.device = pciPID;
2727 }
2728 }
2729 if (ftdi->function > 0) {
2730 UxxxStatus = ftdi_elan_setup_controller(ftdi,
2731 ftdi->function - 1);
2732 if (UxxxStatus)
2733 return UxxxStatus;
2734 return 0;
2735 } else if (controllers > 0) {
2736 return -ENXIO;
2737 } else if (unrecognized > 0) {
2738 return -ENXIO;
2739 } else {
2740 ftdi->enumerated = 0;
2741 return -ENXIO;
2742 }
2743}
2744
2745
2746/*
2747* we use only the first bulk-in and bulk-out endpoints
2748*/
2749static int ftdi_elan_probe(struct usb_interface *interface,
2750 const struct usb_device_id *id)
2751{
2752 struct usb_host_interface *iface_desc;
2753 struct usb_endpoint_descriptor *endpoint;
2754 size_t buffer_size;
2755 int i;
2756 int retval = -ENOMEM;
2757 struct usb_ftdi *ftdi;
2758
2759 ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2760 if (!ftdi) {
2761 printk(KERN_ERR "Out of memory\n");
2762 return -ENOMEM;
2763 }
2764
2765 mutex_lock(&ftdi_module_lock);
2766 list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2767 ftdi->sequence_num = ++ftdi_instances;
2768 mutex_unlock(&ftdi_module_lock);
2769 ftdi_elan_init_kref(ftdi);
2770 sema_init(&ftdi->sw_lock, 1);
2771 ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2772 ftdi->interface = interface;
2773 mutex_init(&ftdi->u132_lock);
2774 ftdi->expected = 4;
2775 iface_desc = interface->cur_altsetting;
2776 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2777 endpoint = &iface_desc->endpoint[i].desc;
2778 if (!ftdi->bulk_in_endpointAddr &&
2779 usb_endpoint_is_bulk_in(endpoint)) {
2780 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2781 ftdi->bulk_in_size = buffer_size;
2782 ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2783 ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2784 if (!ftdi->bulk_in_buffer) {
2785 dev_err(&ftdi->udev->dev, "Could not allocate b"
2786 "ulk_in_buffer\n");
2787 retval = -ENOMEM;
2788 goto error;
2789 }
2790 }
2791 if (!ftdi->bulk_out_endpointAddr &&
2792 usb_endpoint_is_bulk_out(endpoint)) {
2793 ftdi->bulk_out_endpointAddr =
2794 endpoint->bEndpointAddress;
2795 }
2796 }
2797 if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2798 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk"
2799 "-out endpoints\n");
2800 retval = -ENODEV;
2801 goto error;
2802 }
2803 dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2804 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2805 ftdi->bulk_out_endpointAddr);
2806 usb_set_intfdata(interface, ftdi);
2807 if (iface_desc->desc.bInterfaceNumber == 0 &&
2808 ftdi->bulk_in_endpointAddr == 0x81 &&
2809 ftdi->bulk_out_endpointAddr == 0x02) {
2810 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2811 if (retval) {
2812 dev_err(&ftdi->udev->dev, "Not able to get a minor for "
2813 "this device.\n");
2814 usb_set_intfdata(interface, NULL);
2815 retval = -ENOMEM;
2816 goto error;
2817 } else {
2818 ftdi->class = &ftdi_elan_jtag_class;
2819 dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface "
2820 "%d now attached to ftdi%d\n", ftdi,
2821 iface_desc->desc.bInterfaceNumber,
2822 interface->minor);
2823 return 0;
2824 }
2825 } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2826 ftdi->bulk_in_endpointAddr == 0x83 &&
2827 ftdi->bulk_out_endpointAddr == 0x04) {
2828 ftdi->class = NULL;
2829 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now a"
2830 "ctivated\n", ftdi, iface_desc->desc.bInterfaceNumber);
2831 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2832 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2833 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2834 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2835 return 0;
2836 } else {
2837 dev_err(&ftdi->udev->dev,
2838 "Could not find ELAN's U132 device\n");
2839 retval = -ENODEV;
2840 goto error;
2841 }
2842 error:if (ftdi) {
2843 ftdi_elan_put_kref(ftdi);
2844 }
2845 return retval;
2846}
2847
2848static void ftdi_elan_disconnect(struct usb_interface *interface)
2849{
2850 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2851 ftdi->disconnected += 1;
2852 if (ftdi->class) {
2853 int minor = interface->minor;
2854 struct usb_class_driver *class = ftdi->class;
2855 usb_set_intfdata(interface, NULL);
2856 usb_deregister_dev(interface, class);
2857 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on min"
2858 "or %d now disconnected\n", minor);
2859 } else {
2860 ftdi_status_cancel_work(ftdi);
2861 ftdi_command_cancel_work(ftdi);
2862 ftdi_response_cancel_work(ftdi);
2863 ftdi_elan_abandon_completions(ftdi);
2864 ftdi_elan_abandon_targets(ftdi);
2865 if (ftdi->registered) {
2866 platform_device_unregister(&ftdi->platform_dev);
2867 ftdi->synchronized = 0;
2868 ftdi->enumerated = 0;
2869 ftdi->initialized = 0;
2870 ftdi->registered = 0;
2871 }
2872 flush_workqueue(status_queue);
2873 flush_workqueue(command_queue);
2874 flush_workqueue(respond_queue);
2875 ftdi->disconnected += 1;
2876 usb_set_intfdata(interface, NULL);
2877 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller inter"
2878 "face now disconnected\n");
2879 }
2880 ftdi_elan_put_kref(ftdi);
2881}
2882
2883static struct usb_driver ftdi_elan_driver = {
2884 .name = "ftdi-elan",
2885 .probe = ftdi_elan_probe,
2886 .disconnect = ftdi_elan_disconnect,
2887 .id_table = ftdi_elan_table,
2888};
2889static int __init ftdi_elan_init(void)
2890{
2891 int result;
2892 printk(KERN_INFO "driver %s\n", ftdi_elan_driver.name);
2893 mutex_init(&ftdi_module_lock);
2894 INIT_LIST_HEAD(&ftdi_static_list);
2895 status_queue = create_singlethread_workqueue("ftdi-status-control");
2896 if (!status_queue)
2897 goto err_status_queue;
2898 command_queue = create_singlethread_workqueue("ftdi-command-engine");
2899 if (!command_queue)
2900 goto err_command_queue;
2901 respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2902 if (!respond_queue)
2903 goto err_respond_queue;
2904 result = usb_register(&ftdi_elan_driver);
2905 if (result) {
2906 destroy_workqueue(status_queue);
2907 destroy_workqueue(command_queue);
2908 destroy_workqueue(respond_queue);
2909 printk(KERN_ERR "usb_register failed. Error number %d\n",
2910 result);
2911 }
2912 return result;
2913
2914 err_respond_queue:
2915 destroy_workqueue(command_queue);
2916 err_command_queue:
2917 destroy_workqueue(status_queue);
2918 err_status_queue:
2919 printk(KERN_ERR "%s couldn't create workqueue\n", ftdi_elan_driver.name);
2920 return -ENOMEM;
2921}
2922
2923static void __exit ftdi_elan_exit(void)
2924{
2925 struct usb_ftdi *ftdi;
2926 struct usb_ftdi *temp;
2927 usb_deregister(&ftdi_elan_driver);
2928 printk(KERN_INFO "ftdi_u132 driver deregistered\n");
2929 list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2930 ftdi_status_cancel_work(ftdi);
2931 ftdi_command_cancel_work(ftdi);
2932 ftdi_response_cancel_work(ftdi);
2933 } flush_workqueue(status_queue);
2934 destroy_workqueue(status_queue);
2935 status_queue = NULL;
2936 flush_workqueue(command_queue);
2937 destroy_workqueue(command_queue);
2938 command_queue = NULL;
2939 flush_workqueue(respond_queue);
2940 destroy_workqueue(respond_queue);
2941 respond_queue = NULL;
2942}
2943
2944
2945module_init(ftdi_elan_init);
2946module_exit(ftdi_elan_exit);
1/*
2 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
3 *
4 * Copyright(C) 2006 Elan Digital Systems Limited
5 * http://www.elandigitalsystems.com
6 *
7 * Author and Maintainer - Tony Olech - Elan Digital Systems
8 * tony.olech@elandigitalsystems.com
9 *
10 * This program is free software;you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation, version 2.
13 *
14 *
15 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
16 * based on various USB client drivers in the 2.6.15 linux kernel
17 * with constant reference to the 3rd Edition of Linux Device Drivers
18 * published by O'Reilly
19 *
20 * The U132 adapter is a USB to CardBus adapter specifically designed
21 * for PC cards that contain an OHCI host controller. Typical PC cards
22 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
23 *
24 * The U132 adapter will *NOT *work with PC cards that do not contain
25 * an OHCI controller. A simple way to test whether a PC card has an
26 * OHCI controller as an interface is to insert the PC card directly
27 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
28 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
29 * then there is a good chance that the U132 adapter will support the
30 * PC card.(you also need the specific client driver for the PC card)
31 *
32 * Please inform the Author and Maintainer about any PC cards that
33 * contain OHCI Host Controller and work when directly connected to
34 * an embedded CardBus slot but do not work when they are connected
35 * via an ELAN U132 adapter.
36 *
37 */
38
39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
41#include <linux/kernel.h>
42#include <linux/errno.h>
43#include <linux/init.h>
44#include <linux/list.h>
45#include <linux/ioctl.h>
46#include <linux/pci_ids.h>
47#include <linux/slab.h>
48#include <linux/module.h>
49#include <linux/kref.h>
50#include <linux/mutex.h>
51#include <asm/uaccess.h>
52#include <linux/usb.h>
53#include <linux/workqueue.h>
54#include <linux/platform_device.h>
55MODULE_AUTHOR("Tony Olech");
56MODULE_DESCRIPTION("FTDI ELAN driver");
57MODULE_LICENSE("GPL");
58#define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
59static bool distrust_firmware = 1;
60module_param(distrust_firmware, bool, 0);
61MODULE_PARM_DESC(distrust_firmware,
62 "true to distrust firmware power/overcurrent setup");
63extern struct platform_driver u132_platform_driver;
64static struct workqueue_struct *status_queue;
65static struct workqueue_struct *command_queue;
66static struct workqueue_struct *respond_queue;
67/*
68 * ftdi_module_lock exists to protect access to global variables
69 *
70 */
71static struct mutex ftdi_module_lock;
72static int ftdi_instances = 0;
73static struct list_head ftdi_static_list;
74/*
75 * end of the global variables protected by ftdi_module_lock
76 */
77#include "usb_u132.h"
78#include <asm/io.h>
79#include <linux/usb/hcd.h>
80
81/* FIXME ohci.h is ONLY for internal use by the OHCI driver.
82 * If you're going to try stuff like this, you need to split
83 * out shareable stuff (register declarations?) into its own
84 * file, maybe name <linux/usb/ohci.h>
85 */
86
87#include "../host/ohci.h"
88/* Define these values to match your devices*/
89#define USB_FTDI_ELAN_VENDOR_ID 0x0403
90#define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
91/* table of devices that work with this driver*/
92static const struct usb_device_id ftdi_elan_table[] = {
93 {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
94 { /* Terminating entry */ }
95};
96
97MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
98/* only the jtag(firmware upgrade device) interface requires
99 * a device file and corresponding minor number, but the
100 * interface is created unconditionally - I suppose it could
101 * be configured or not according to a module parameter.
102 * But since we(now) require one interface per device,
103 * and since it unlikely that a normal installation would
104 * require more than a couple of elan-ftdi devices, 8 seems
105 * like a reasonable limit to have here, and if someone
106 * really requires more than 8 devices, then they can frig the
107 * code and recompile
108 */
109#define USB_FTDI_ELAN_MINOR_BASE 192
110#define COMMAND_BITS 5
111#define COMMAND_SIZE (1<<COMMAND_BITS)
112#define COMMAND_MASK (COMMAND_SIZE-1)
113struct u132_command {
114 u8 header;
115 u16 length;
116 u8 address;
117 u8 width;
118 u32 value;
119 int follows;
120 void *buffer;
121};
122#define RESPOND_BITS 5
123#define RESPOND_SIZE (1<<RESPOND_BITS)
124#define RESPOND_MASK (RESPOND_SIZE-1)
125struct u132_respond {
126 u8 header;
127 u8 address;
128 u32 *value;
129 int *result;
130 struct completion wait_completion;
131};
132struct u132_target {
133 void *endp;
134 struct urb *urb;
135 int toggle_bits;
136 int error_count;
137 int condition_code;
138 int repeat_number;
139 int halted;
140 int skipped;
141 int actual;
142 int non_null;
143 int active;
144 int abandoning;
145 void (*callback)(void *endp, struct urb *urb, u8 *buf, int len,
146 int toggle_bits, int error_count, int condition_code,
147 int repeat_number, int halted, int skipped, int actual,
148 int non_null);
149};
150/* Structure to hold all of our device specific stuff*/
151struct usb_ftdi {
152 struct list_head ftdi_list;
153 struct mutex u132_lock;
154 int command_next;
155 int command_head;
156 struct u132_command command[COMMAND_SIZE];
157 int respond_next;
158 int respond_head;
159 struct u132_respond respond[RESPOND_SIZE];
160 struct u132_target target[4];
161 char device_name[16];
162 unsigned synchronized:1;
163 unsigned enumerated:1;
164 unsigned registered:1;
165 unsigned initialized:1;
166 unsigned card_ejected:1;
167 int function;
168 int sequence_num;
169 int disconnected;
170 int gone_away;
171 int stuck_status;
172 int status_queue_delay;
173 struct semaphore sw_lock;
174 struct usb_device *udev;
175 struct usb_interface *interface;
176 struct usb_class_driver *class;
177 struct delayed_work status_work;
178 struct delayed_work command_work;
179 struct delayed_work respond_work;
180 struct u132_platform_data platform_data;
181 struct resource resources[0];
182 struct platform_device platform_dev;
183 unsigned char *bulk_in_buffer;
184 size_t bulk_in_size;
185 size_t bulk_in_last;
186 size_t bulk_in_left;
187 __u8 bulk_in_endpointAddr;
188 __u8 bulk_out_endpointAddr;
189 struct kref kref;
190 u32 controlreg;
191 u8 response[4 + 1024];
192 int expected;
193 int received;
194 int ed_found;
195};
196#define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
197#define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
198 platform_dev)
199static struct usb_driver ftdi_elan_driver;
200static void ftdi_elan_delete(struct kref *kref)
201{
202 struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
203 dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
204 usb_put_dev(ftdi->udev);
205 ftdi->disconnected += 1;
206 mutex_lock(&ftdi_module_lock);
207 list_del_init(&ftdi->ftdi_list);
208 ftdi_instances -= 1;
209 mutex_unlock(&ftdi_module_lock);
210 kfree(ftdi->bulk_in_buffer);
211 ftdi->bulk_in_buffer = NULL;
212}
213
214static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
215{
216 kref_put(&ftdi->kref, ftdi_elan_delete);
217}
218
219static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
220{
221 kref_get(&ftdi->kref);
222}
223
224static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
225{
226 kref_init(&ftdi->kref);
227}
228
229static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
230{
231 if (!queue_delayed_work(status_queue, &ftdi->status_work, delta))
232 kref_put(&ftdi->kref, ftdi_elan_delete);
233}
234
235static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
236{
237 if (queue_delayed_work(status_queue, &ftdi->status_work, delta))
238 kref_get(&ftdi->kref);
239}
240
241static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
242{
243 if (cancel_delayed_work(&ftdi->status_work))
244 kref_put(&ftdi->kref, ftdi_elan_delete);
245}
246
247static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
248{
249 if (!queue_delayed_work(command_queue, &ftdi->command_work, delta))
250 kref_put(&ftdi->kref, ftdi_elan_delete);
251}
252
253static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
254{
255 if (queue_delayed_work(command_queue, &ftdi->command_work, delta))
256 kref_get(&ftdi->kref);
257}
258
259static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
260{
261 if (cancel_delayed_work(&ftdi->command_work))
262 kref_put(&ftdi->kref, ftdi_elan_delete);
263}
264
265static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
266 unsigned int delta)
267{
268 if (!queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
269 kref_put(&ftdi->kref, ftdi_elan_delete);
270}
271
272static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
273{
274 if (queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
275 kref_get(&ftdi->kref);
276}
277
278static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
279{
280 if (cancel_delayed_work(&ftdi->respond_work))
281 kref_put(&ftdi->kref, ftdi_elan_delete);
282}
283
284void ftdi_elan_gone_away(struct platform_device *pdev)
285{
286 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
287 ftdi->gone_away += 1;
288 ftdi_elan_put_kref(ftdi);
289}
290
291
292EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
293static void ftdi_release_platform_dev(struct device *dev)
294{
295 dev->parent = NULL;
296}
297
298static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
299 struct u132_target *target, u8 *buffer, int length);
300static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
301static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
302static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
303static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
304static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
305static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
306static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
307static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
308static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
309static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
310{
311 int result;
312 if (ftdi->platform_dev.dev.parent)
313 return -EBUSY;
314 ftdi_elan_get_kref(ftdi);
315 ftdi->platform_data.potpg = 100;
316 ftdi->platform_data.reset = NULL;
317 ftdi->platform_dev.id = ftdi->sequence_num;
318 ftdi->platform_dev.resource = ftdi->resources;
319 ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
320 ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
321 ftdi->platform_dev.dev.parent = NULL;
322 ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
323 ftdi->platform_dev.dev.dma_mask = NULL;
324 snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
325 ftdi->platform_dev.name = ftdi->device_name;
326 dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
327 request_module("u132_hcd");
328 dev_info(&ftdi->udev->dev, "registering '%s'\n",
329 ftdi->platform_dev.name);
330 result = platform_device_register(&ftdi->platform_dev);
331 return result;
332}
333
334static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
335{
336 mutex_lock(&ftdi->u132_lock);
337 while (ftdi->respond_next > ftdi->respond_head) {
338 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
339 ftdi->respond_head++];
340 *respond->result = -ESHUTDOWN;
341 *respond->value = 0;
342 complete(&respond->wait_completion);
343 } mutex_unlock(&ftdi->u132_lock);
344}
345
346static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
347{
348 int ed_number = 4;
349 mutex_lock(&ftdi->u132_lock);
350 while (ed_number-- > 0) {
351 struct u132_target *target = &ftdi->target[ed_number];
352 if (target->active == 1) {
353 target->condition_code = TD_DEVNOTRESP;
354 mutex_unlock(&ftdi->u132_lock);
355 ftdi_elan_do_callback(ftdi, target, NULL, 0);
356 mutex_lock(&ftdi->u132_lock);
357 }
358 }
359 ftdi->received = 0;
360 ftdi->expected = 4;
361 ftdi->ed_found = 0;
362 mutex_unlock(&ftdi->u132_lock);
363}
364
365static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
366{
367 int ed_number = 4;
368 mutex_lock(&ftdi->u132_lock);
369 while (ed_number-- > 0) {
370 struct u132_target *target = &ftdi->target[ed_number];
371 target->abandoning = 1;
372 wait_1:if (target->active == 1) {
373 int command_size = ftdi->command_next -
374 ftdi->command_head;
375 if (command_size < COMMAND_SIZE) {
376 struct u132_command *command = &ftdi->command[
377 COMMAND_MASK & ftdi->command_next];
378 command->header = 0x80 | (ed_number << 5) | 0x4;
379 command->length = 0x00;
380 command->address = 0x00;
381 command->width = 0x00;
382 command->follows = 0;
383 command->value = 0;
384 command->buffer = &command->value;
385 ftdi->command_next += 1;
386 ftdi_elan_kick_command_queue(ftdi);
387 } else {
388 mutex_unlock(&ftdi->u132_lock);
389 msleep(100);
390 mutex_lock(&ftdi->u132_lock);
391 goto wait_1;
392 }
393 }
394 wait_2:if (target->active == 1) {
395 int command_size = ftdi->command_next -
396 ftdi->command_head;
397 if (command_size < COMMAND_SIZE) {
398 struct u132_command *command = &ftdi->command[
399 COMMAND_MASK & ftdi->command_next];
400 command->header = 0x90 | (ed_number << 5);
401 command->length = 0x00;
402 command->address = 0x00;
403 command->width = 0x00;
404 command->follows = 0;
405 command->value = 0;
406 command->buffer = &command->value;
407 ftdi->command_next += 1;
408 ftdi_elan_kick_command_queue(ftdi);
409 } else {
410 mutex_unlock(&ftdi->u132_lock);
411 msleep(100);
412 mutex_lock(&ftdi->u132_lock);
413 goto wait_2;
414 }
415 }
416 }
417 ftdi->received = 0;
418 ftdi->expected = 4;
419 ftdi->ed_found = 0;
420 mutex_unlock(&ftdi->u132_lock);
421}
422
423static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
424{
425 int ed_number = 4;
426 mutex_lock(&ftdi->u132_lock);
427 while (ed_number-- > 0) {
428 struct u132_target *target = &ftdi->target[ed_number];
429 target->abandoning = 1;
430 wait:if (target->active == 1) {
431 int command_size = ftdi->command_next -
432 ftdi->command_head;
433 if (command_size < COMMAND_SIZE) {
434 struct u132_command *command = &ftdi->command[
435 COMMAND_MASK & ftdi->command_next];
436 command->header = 0x80 | (ed_number << 5) | 0x4;
437 command->length = 0x00;
438 command->address = 0x00;
439 command->width = 0x00;
440 command->follows = 0;
441 command->value = 0;
442 command->buffer = &command->value;
443 ftdi->command_next += 1;
444 ftdi_elan_kick_command_queue(ftdi);
445 } else {
446 mutex_unlock(&ftdi->u132_lock);
447 msleep(100);
448 mutex_lock(&ftdi->u132_lock);
449 goto wait;
450 }
451 }
452 }
453 ftdi->received = 0;
454 ftdi->expected = 4;
455 ftdi->ed_found = 0;
456 mutex_unlock(&ftdi->u132_lock);
457}
458
459static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
460{
461 ftdi_command_queue_work(ftdi, 0);
462}
463
464static void ftdi_elan_command_work(struct work_struct *work)
465{
466 struct usb_ftdi *ftdi =
467 container_of(work, struct usb_ftdi, command_work.work);
468
469 if (ftdi->disconnected > 0) {
470 ftdi_elan_put_kref(ftdi);
471 return;
472 } else {
473 int retval = ftdi_elan_command_engine(ftdi);
474 if (retval == -ESHUTDOWN) {
475 ftdi->disconnected += 1;
476 } else if (retval == -ENODEV) {
477 ftdi->disconnected += 1;
478 } else if (retval)
479 dev_err(&ftdi->udev->dev, "command error %d\n", retval);
480 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
481 return;
482 }
483}
484
485static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
486{
487 ftdi_respond_queue_work(ftdi, 0);
488}
489
490static void ftdi_elan_respond_work(struct work_struct *work)
491{
492 struct usb_ftdi *ftdi =
493 container_of(work, struct usb_ftdi, respond_work.work);
494 if (ftdi->disconnected > 0) {
495 ftdi_elan_put_kref(ftdi);
496 return;
497 } else {
498 int retval = ftdi_elan_respond_engine(ftdi);
499 if (retval == 0) {
500 } else if (retval == -ESHUTDOWN) {
501 ftdi->disconnected += 1;
502 } else if (retval == -ENODEV) {
503 ftdi->disconnected += 1;
504 } else if (retval == -EILSEQ) {
505 ftdi->disconnected += 1;
506 } else {
507 ftdi->disconnected += 1;
508 dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
509 }
510 if (ftdi->disconnected > 0) {
511 ftdi_elan_abandon_completions(ftdi);
512 ftdi_elan_abandon_targets(ftdi);
513 }
514 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
515 return;
516 }
517}
518
519
520/*
521 * the sw_lock is initially held and will be freed
522 * after the FTDI has been synchronized
523 *
524 */
525static void ftdi_elan_status_work(struct work_struct *work)
526{
527 struct usb_ftdi *ftdi =
528 container_of(work, struct usb_ftdi, status_work.work);
529 int work_delay_in_msec = 0;
530 if (ftdi->disconnected > 0) {
531 ftdi_elan_put_kref(ftdi);
532 return;
533 } else if (ftdi->synchronized == 0) {
534 down(&ftdi->sw_lock);
535 if (ftdi_elan_synchronize(ftdi) == 0) {
536 ftdi->synchronized = 1;
537 ftdi_command_queue_work(ftdi, 1);
538 ftdi_respond_queue_work(ftdi, 1);
539 up(&ftdi->sw_lock);
540 work_delay_in_msec = 100;
541 } else {
542 dev_err(&ftdi->udev->dev, "synchronize failed\n");
543 up(&ftdi->sw_lock);
544 work_delay_in_msec = 10 *1000;
545 }
546 } else if (ftdi->stuck_status > 0) {
547 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
548 ftdi->stuck_status = 0;
549 ftdi->synchronized = 0;
550 } else if ((ftdi->stuck_status++ % 60) == 1) {
551 dev_err(&ftdi->udev->dev, "WRONG type of card inserted - please remove\n");
552 } else
553 dev_err(&ftdi->udev->dev, "WRONG type of card inserted - checked %d times\n",
554 ftdi->stuck_status);
555 work_delay_in_msec = 100;
556 } else if (ftdi->enumerated == 0) {
557 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
558 ftdi->enumerated = 1;
559 work_delay_in_msec = 250;
560 } else
561 work_delay_in_msec = 1000;
562 } else if (ftdi->initialized == 0) {
563 if (ftdi_elan_setupOHCI(ftdi) == 0) {
564 ftdi->initialized = 1;
565 work_delay_in_msec = 500;
566 } else {
567 dev_err(&ftdi->udev->dev, "initialized failed - trying again in 10 seconds\n");
568 work_delay_in_msec = 1 *1000;
569 }
570 } else if (ftdi->registered == 0) {
571 work_delay_in_msec = 10;
572 if (ftdi_elan_hcd_init(ftdi) == 0) {
573 ftdi->registered = 1;
574 } else
575 dev_err(&ftdi->udev->dev, "register failed\n");
576 work_delay_in_msec = 250;
577 } else {
578 if (ftdi_elan_checkingPCI(ftdi) == 0) {
579 work_delay_in_msec = 250;
580 } else if (ftdi->controlreg & 0x00400000) {
581 if (ftdi->gone_away > 0) {
582 dev_err(&ftdi->udev->dev, "PCI device eject confirmed platform_dev.dev.parent=%p platform_dev.dev=%p\n",
583 ftdi->platform_dev.dev.parent,
584 &ftdi->platform_dev.dev);
585 platform_device_unregister(&ftdi->platform_dev);
586 ftdi->platform_dev.dev.parent = NULL;
587 ftdi->registered = 0;
588 ftdi->enumerated = 0;
589 ftdi->card_ejected = 0;
590 ftdi->initialized = 0;
591 ftdi->gone_away = 0;
592 } else
593 ftdi_elan_flush_targets(ftdi);
594 work_delay_in_msec = 250;
595 } else {
596 dev_err(&ftdi->udev->dev, "PCI device has disappeared\n");
597 ftdi_elan_cancel_targets(ftdi);
598 work_delay_in_msec = 500;
599 ftdi->enumerated = 0;
600 ftdi->initialized = 0;
601 }
602 }
603 if (ftdi->disconnected > 0) {
604 ftdi_elan_put_kref(ftdi);
605 return;
606 } else {
607 ftdi_status_requeue_work(ftdi,
608 msecs_to_jiffies(work_delay_in_msec));
609 return;
610 }
611}
612
613
614/*
615 * file_operations for the jtag interface
616 *
617 * the usage count for the device is incremented on open()
618 * and decremented on release()
619 */
620static int ftdi_elan_open(struct inode *inode, struct file *file)
621{
622 int subminor;
623 struct usb_interface *interface;
624
625 subminor = iminor(inode);
626 interface = usb_find_interface(&ftdi_elan_driver, subminor);
627
628 if (!interface) {
629 pr_err("can't find device for minor %d\n", subminor);
630 return -ENODEV;
631 } else {
632 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
633 if (!ftdi) {
634 return -ENODEV;
635 } else {
636 if (down_interruptible(&ftdi->sw_lock)) {
637 return -EINTR;
638 } else {
639 ftdi_elan_get_kref(ftdi);
640 file->private_data = ftdi;
641 return 0;
642 }
643 }
644 }
645}
646
647static int ftdi_elan_release(struct inode *inode, struct file *file)
648{
649 struct usb_ftdi *ftdi = file->private_data;
650 if (ftdi == NULL)
651 return -ENODEV;
652 up(&ftdi->sw_lock); /* decrement the count on our device */
653 ftdi_elan_put_kref(ftdi);
654 return 0;
655}
656
657
658/*
659 *
660 * blocking bulk reads are used to get data from the device
661 *
662 */
663static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
664 size_t count, loff_t *ppos)
665{
666 char data[30 *3 + 4];
667 char *d = data;
668 int m = (sizeof(data) - 1) / 3;
669 int bytes_read = 0;
670 int retry_on_empty = 10;
671 int retry_on_timeout = 5;
672 struct usb_ftdi *ftdi = file->private_data;
673 if (ftdi->disconnected > 0) {
674 return -ENODEV;
675 }
676 data[0] = 0;
677have:if (ftdi->bulk_in_left > 0) {
678 if (count-- > 0) {
679 char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
680 ftdi->bulk_in_left -= 1;
681 if (bytes_read < m) {
682 d += sprintf(d, " %02X", 0x000000FF & *p);
683 } else if (bytes_read > m) {
684 } else
685 d += sprintf(d, " ..");
686 if (copy_to_user(buffer++, p, 1)) {
687 return -EFAULT;
688 } else {
689 bytes_read += 1;
690 goto have;
691 }
692 } else
693 return bytes_read;
694 }
695more:if (count > 0) {
696 int packet_bytes = 0;
697 int retval = usb_bulk_msg(ftdi->udev,
698 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
699 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
700 &packet_bytes, 50);
701 if (packet_bytes > 2) {
702 ftdi->bulk_in_left = packet_bytes - 2;
703 ftdi->bulk_in_last = 1;
704 goto have;
705 } else if (retval == -ETIMEDOUT) {
706 if (retry_on_timeout-- > 0) {
707 goto more;
708 } else if (bytes_read > 0) {
709 return bytes_read;
710 } else
711 return retval;
712 } else if (retval == 0) {
713 if (retry_on_empty-- > 0) {
714 goto more;
715 } else
716 return bytes_read;
717 } else
718 return retval;
719 } else
720 return bytes_read;
721}
722
723static void ftdi_elan_write_bulk_callback(struct urb *urb)
724{
725 struct usb_ftdi *ftdi = urb->context;
726 int status = urb->status;
727
728 if (status && !(status == -ENOENT || status == -ECONNRESET ||
729 status == -ESHUTDOWN)) {
730 dev_err(&ftdi->udev->dev,
731 "urb=%p write bulk status received: %d\n", urb, status);
732 }
733 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
734 urb->transfer_buffer, urb->transfer_dma);
735}
736
737static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
738 char *buf, int command_size, int total_size)
739{
740 int ed_commands = 0;
741 int b = 0;
742 int I = command_size;
743 int i = ftdi->command_head;
744 while (I-- > 0) {
745 struct u132_command *command = &ftdi->command[COMMAND_MASK &
746 i++];
747 int F = command->follows;
748 u8 *f = command->buffer;
749 if (command->header & 0x80) {
750 ed_commands |= 1 << (0x3 & (command->header >> 5));
751 }
752 buf[b++] = command->header;
753 buf[b++] = (command->length >> 0) & 0x00FF;
754 buf[b++] = (command->length >> 8) & 0x00FF;
755 buf[b++] = command->address;
756 buf[b++] = command->width;
757 while (F-- > 0) {
758 buf[b++] = *f++;
759 }
760 }
761 return ed_commands;
762}
763
764static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
765{
766 int total_size = 0;
767 int I = command_size;
768 int i = ftdi->command_head;
769 while (I-- > 0) {
770 struct u132_command *command = &ftdi->command[COMMAND_MASK &
771 i++];
772 total_size += 5 + command->follows;
773 } return total_size;
774}
775
776static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
777{
778 int retval;
779 char *buf;
780 int ed_commands;
781 int total_size;
782 struct urb *urb;
783 int command_size = ftdi->command_next - ftdi->command_head;
784 if (command_size == 0)
785 return 0;
786 total_size = ftdi_elan_total_command_size(ftdi, command_size);
787 urb = usb_alloc_urb(0, GFP_KERNEL);
788 if (!urb) {
789 dev_err(&ftdi->udev->dev, "could not get a urb to write %d commands totaling %d bytes to the Uxxx\n",
790 command_size, total_size);
791 return -ENOMEM;
792 }
793 buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
794 &urb->transfer_dma);
795 if (!buf) {
796 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d commands totaling %d bytes to the Uxxx\n",
797 command_size, total_size);
798 usb_free_urb(urb);
799 return -ENOMEM;
800 }
801 ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
802 command_size, total_size);
803 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
804 ftdi->bulk_out_endpointAddr), buf, total_size,
805 ftdi_elan_write_bulk_callback, ftdi);
806 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
807 if (ed_commands) {
808 char diag[40 *3 + 4];
809 char *d = diag;
810 int m = total_size;
811 u8 *c = buf;
812 int s = (sizeof(diag) - 1) / 3;
813 diag[0] = 0;
814 while (s-- > 0 && m-- > 0) {
815 if (s > 0 || m == 0) {
816 d += sprintf(d, " %02X", *c++);
817 } else
818 d += sprintf(d, " ..");
819 }
820 }
821 retval = usb_submit_urb(urb, GFP_KERNEL);
822 if (retval) {
823 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write %d commands totaling %d bytes to the Uxxx\n",
824 retval, urb, command_size, total_size);
825 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
826 usb_free_urb(urb);
827 return retval;
828 }
829 usb_free_urb(urb); /* release our reference to this urb,
830 the USB core will eventually free it entirely */
831 ftdi->command_head += command_size;
832 ftdi_elan_kick_respond_queue(ftdi);
833 return 0;
834}
835
836static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
837 struct u132_target *target, u8 *buffer, int length)
838{
839 struct urb *urb = target->urb;
840 int halted = target->halted;
841 int skipped = target->skipped;
842 int actual = target->actual;
843 int non_null = target->non_null;
844 int toggle_bits = target->toggle_bits;
845 int error_count = target->error_count;
846 int condition_code = target->condition_code;
847 int repeat_number = target->repeat_number;
848 void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
849 int, int, int, int) = target->callback;
850 target->active -= 1;
851 target->callback = NULL;
852 (*callback) (target->endp, urb, buffer, length, toggle_bits,
853 error_count, condition_code, repeat_number, halted, skipped,
854 actual, non_null);
855}
856
857static char *have_ed_set_response(struct usb_ftdi *ftdi,
858 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
859 char *b)
860{
861 int payload = (ed_length >> 0) & 0x07FF;
862 mutex_lock(&ftdi->u132_lock);
863 target->actual = 0;
864 target->non_null = (ed_length >> 15) & 0x0001;
865 target->repeat_number = (ed_length >> 11) & 0x000F;
866 if (ed_type == 0x02) {
867 if (payload == 0 || target->abandoning > 0) {
868 target->abandoning = 0;
869 mutex_unlock(&ftdi->u132_lock);
870 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
871 payload);
872 ftdi->received = 0;
873 ftdi->expected = 4;
874 ftdi->ed_found = 0;
875 return ftdi->response;
876 } else {
877 ftdi->expected = 4 + payload;
878 ftdi->ed_found = 1;
879 mutex_unlock(&ftdi->u132_lock);
880 return b;
881 }
882 } else if (ed_type == 0x03) {
883 if (payload == 0 || target->abandoning > 0) {
884 target->abandoning = 0;
885 mutex_unlock(&ftdi->u132_lock);
886 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
887 payload);
888 ftdi->received = 0;
889 ftdi->expected = 4;
890 ftdi->ed_found = 0;
891 return ftdi->response;
892 } else {
893 ftdi->expected = 4 + payload;
894 ftdi->ed_found = 1;
895 mutex_unlock(&ftdi->u132_lock);
896 return b;
897 }
898 } else if (ed_type == 0x01) {
899 target->abandoning = 0;
900 mutex_unlock(&ftdi->u132_lock);
901 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
902 payload);
903 ftdi->received = 0;
904 ftdi->expected = 4;
905 ftdi->ed_found = 0;
906 return ftdi->response;
907 } else {
908 target->abandoning = 0;
909 mutex_unlock(&ftdi->u132_lock);
910 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
911 payload);
912 ftdi->received = 0;
913 ftdi->expected = 4;
914 ftdi->ed_found = 0;
915 return ftdi->response;
916 }
917}
918
919static char *have_ed_get_response(struct usb_ftdi *ftdi,
920 struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
921 char *b)
922{
923 mutex_lock(&ftdi->u132_lock);
924 target->condition_code = TD_DEVNOTRESP;
925 target->actual = (ed_length >> 0) & 0x01FF;
926 target->non_null = (ed_length >> 15) & 0x0001;
927 target->repeat_number = (ed_length >> 11) & 0x000F;
928 mutex_unlock(&ftdi->u132_lock);
929 if (target->active)
930 ftdi_elan_do_callback(ftdi, target, NULL, 0);
931 target->abandoning = 0;
932 ftdi->received = 0;
933 ftdi->expected = 4;
934 ftdi->ed_found = 0;
935 return ftdi->response;
936}
937
938
939/*
940 * The engine tries to empty the FTDI fifo
941 *
942 * all responses found in the fifo data are dispatched thus
943 * the response buffer can only ever hold a maximum sized
944 * response from the Uxxx.
945 *
946 */
947static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
948{
949 u8 *b = ftdi->response + ftdi->received;
950 int bytes_read = 0;
951 int retry_on_empty = 1;
952 int retry_on_timeout = 3;
953 int empty_packets = 0;
954read:{
955 int packet_bytes = 0;
956 int retval = usb_bulk_msg(ftdi->udev,
957 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
958 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
959 &packet_bytes, 500);
960 char diag[30 *3 + 4];
961 char *d = diag;
962 int m = packet_bytes;
963 u8 *c = ftdi->bulk_in_buffer;
964 int s = (sizeof(diag) - 1) / 3;
965 diag[0] = 0;
966 while (s-- > 0 && m-- > 0) {
967 if (s > 0 || m == 0) {
968 d += sprintf(d, " %02X", *c++);
969 } else
970 d += sprintf(d, " ..");
971 }
972 if (packet_bytes > 2) {
973 ftdi->bulk_in_left = packet_bytes - 2;
974 ftdi->bulk_in_last = 1;
975 goto have;
976 } else if (retval == -ETIMEDOUT) {
977 if (retry_on_timeout-- > 0) {
978 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
979 packet_bytes, bytes_read, diag);
980 goto more;
981 } else if (bytes_read > 0) {
982 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
983 bytes_read, diag);
984 return -ENOMEM;
985 } else {
986 dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
987 packet_bytes, bytes_read, diag);
988 return -ENOMEM;
989 }
990 } else if (retval == -EILSEQ) {
991 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
992 retval, packet_bytes, bytes_read, diag);
993 return retval;
994 } else if (retval) {
995 dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
996 retval, packet_bytes, bytes_read, diag);
997 return retval;
998 } else if (packet_bytes == 2) {
999 unsigned char s0 = ftdi->bulk_in_buffer[0];
1000 unsigned char s1 = ftdi->bulk_in_buffer[1];
1001 empty_packets += 1;
1002 if (s0 == 0x31 && s1 == 0x60) {
1003 if (retry_on_empty-- > 0) {
1004 goto more;
1005 } else
1006 return 0;
1007 } else if (s0 == 0x31 && s1 == 0x00) {
1008 if (retry_on_empty-- > 0) {
1009 goto more;
1010 } else
1011 return 0;
1012 } else {
1013 if (retry_on_empty-- > 0) {
1014 goto more;
1015 } else
1016 return 0;
1017 }
1018 } else if (packet_bytes == 1) {
1019 if (retry_on_empty-- > 0) {
1020 goto more;
1021 } else
1022 return 0;
1023 } else {
1024 if (retry_on_empty-- > 0) {
1025 goto more;
1026 } else
1027 return 0;
1028 }
1029 }
1030more:{
1031 goto read;
1032 }
1033have:if (ftdi->bulk_in_left > 0) {
1034 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1035 bytes_read += 1;
1036 ftdi->bulk_in_left -= 1;
1037 if (ftdi->received == 0 && c == 0xFF) {
1038 goto have;
1039 } else
1040 *b++ = c;
1041 if (++ftdi->received < ftdi->expected) {
1042 goto have;
1043 } else if (ftdi->ed_found) {
1044 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1045 u16 ed_length = (ftdi->response[2] << 8) |
1046 ftdi->response[1];
1047 struct u132_target *target = &ftdi->target[ed_number];
1048 int payload = (ed_length >> 0) & 0x07FF;
1049 char diag[30 *3 + 4];
1050 char *d = diag;
1051 int m = payload;
1052 u8 *c = 4 + ftdi->response;
1053 int s = (sizeof(diag) - 1) / 3;
1054 diag[0] = 0;
1055 while (s-- > 0 && m-- > 0) {
1056 if (s > 0 || m == 0) {
1057 d += sprintf(d, " %02X", *c++);
1058 } else
1059 d += sprintf(d, " ..");
1060 }
1061 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1062 payload);
1063 ftdi->received = 0;
1064 ftdi->expected = 4;
1065 ftdi->ed_found = 0;
1066 b = ftdi->response;
1067 goto have;
1068 } else if (ftdi->expected == 8) {
1069 u8 buscmd;
1070 int respond_head = ftdi->respond_head++;
1071 struct u132_respond *respond = &ftdi->respond[
1072 RESPOND_MASK & respond_head];
1073 u32 data = ftdi->response[7];
1074 data <<= 8;
1075 data |= ftdi->response[6];
1076 data <<= 8;
1077 data |= ftdi->response[5];
1078 data <<= 8;
1079 data |= ftdi->response[4];
1080 *respond->value = data;
1081 *respond->result = 0;
1082 complete(&respond->wait_completion);
1083 ftdi->received = 0;
1084 ftdi->expected = 4;
1085 ftdi->ed_found = 0;
1086 b = ftdi->response;
1087 buscmd = (ftdi->response[0] >> 0) & 0x0F;
1088 if (buscmd == 0x00) {
1089 } else if (buscmd == 0x02) {
1090 } else if (buscmd == 0x06) {
1091 } else if (buscmd == 0x0A) {
1092 } else
1093 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1094 buscmd, data);
1095 goto have;
1096 } else {
1097 if ((ftdi->response[0] & 0x80) == 0x00) {
1098 ftdi->expected = 8;
1099 goto have;
1100 } else {
1101 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1102 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1103 u16 ed_length = (ftdi->response[2] << 8) |
1104 ftdi->response[1];
1105 struct u132_target *target = &ftdi->target[
1106 ed_number];
1107 target->halted = (ftdi->response[0] >> 3) &
1108 0x01;
1109 target->skipped = (ftdi->response[0] >> 2) &
1110 0x01;
1111 target->toggle_bits = (ftdi->response[3] >> 6)
1112 & 0x03;
1113 target->error_count = (ftdi->response[3] >> 4)
1114 & 0x03;
1115 target->condition_code = (ftdi->response[
1116 3] >> 0) & 0x0F;
1117 if ((ftdi->response[0] & 0x10) == 0x00) {
1118 b = have_ed_set_response(ftdi, target,
1119 ed_length, ed_number, ed_type,
1120 b);
1121 goto have;
1122 } else {
1123 b = have_ed_get_response(ftdi, target,
1124 ed_length, ed_number, ed_type,
1125 b);
1126 goto have;
1127 }
1128 }
1129 }
1130 } else
1131 goto more;
1132}
1133
1134
1135/*
1136 * create a urb, and a buffer for it, and copy the data to the urb
1137 *
1138 */
1139static ssize_t ftdi_elan_write(struct file *file,
1140 const char __user *user_buffer, size_t count,
1141 loff_t *ppos)
1142{
1143 int retval = 0;
1144 struct urb *urb;
1145 char *buf;
1146 struct usb_ftdi *ftdi = file->private_data;
1147
1148 if (ftdi->disconnected > 0) {
1149 return -ENODEV;
1150 }
1151 if (count == 0) {
1152 goto exit;
1153 }
1154 urb = usb_alloc_urb(0, GFP_KERNEL);
1155 if (!urb) {
1156 retval = -ENOMEM;
1157 goto error_1;
1158 }
1159 buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1160 &urb->transfer_dma);
1161 if (!buf) {
1162 retval = -ENOMEM;
1163 goto error_2;
1164 }
1165 if (copy_from_user(buf, user_buffer, count)) {
1166 retval = -EFAULT;
1167 goto error_3;
1168 }
1169 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1170 ftdi->bulk_out_endpointAddr), buf, count,
1171 ftdi_elan_write_bulk_callback, ftdi);
1172 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1173 retval = usb_submit_urb(urb, GFP_KERNEL);
1174 if (retval) {
1175 dev_err(&ftdi->udev->dev,
1176 "failed submitting write urb, error %d\n", retval);
1177 goto error_3;
1178 }
1179 usb_free_urb(urb);
1180
1181exit:
1182 return count;
1183error_3:
1184 usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1185error_2:
1186 usb_free_urb(urb);
1187error_1:
1188 return retval;
1189}
1190
1191static const struct file_operations ftdi_elan_fops = {
1192 .owner = THIS_MODULE,
1193 .llseek = no_llseek,
1194 .read = ftdi_elan_read,
1195 .write = ftdi_elan_write,
1196 .open = ftdi_elan_open,
1197 .release = ftdi_elan_release,
1198};
1199
1200/*
1201 * usb class driver info in order to get a minor number from the usb core,
1202 * and to have the device registered with the driver core
1203 */
1204static struct usb_class_driver ftdi_elan_jtag_class = {
1205 .name = "ftdi-%d-jtag",
1206 .fops = &ftdi_elan_fops,
1207 .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1208};
1209
1210/*
1211 * the following definitions are for the
1212 * ELAN FPGA state machgine processor that
1213 * lies on the other side of the FTDI chip
1214 */
1215#define cPCIu132rd 0x0
1216#define cPCIu132wr 0x1
1217#define cPCIiord 0x2
1218#define cPCIiowr 0x3
1219#define cPCImemrd 0x6
1220#define cPCImemwr 0x7
1221#define cPCIcfgrd 0xA
1222#define cPCIcfgwr 0xB
1223#define cPCInull 0xF
1224#define cU132cmd_status 0x0
1225#define cU132flash 0x1
1226#define cPIDsetup 0x0
1227#define cPIDout 0x1
1228#define cPIDin 0x2
1229#define cPIDinonce 0x3
1230#define cCCnoerror 0x0
1231#define cCCcrc 0x1
1232#define cCCbitstuff 0x2
1233#define cCCtoggle 0x3
1234#define cCCstall 0x4
1235#define cCCnoresp 0x5
1236#define cCCbadpid1 0x6
1237#define cCCbadpid2 0x7
1238#define cCCdataoverrun 0x8
1239#define cCCdataunderrun 0x9
1240#define cCCbuffoverrun 0xC
1241#define cCCbuffunderrun 0xD
1242#define cCCnotaccessed 0xF
1243static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1244{
1245wait:if (ftdi->disconnected > 0) {
1246 return -ENODEV;
1247 } else {
1248 int command_size;
1249 mutex_lock(&ftdi->u132_lock);
1250 command_size = ftdi->command_next - ftdi->command_head;
1251 if (command_size < COMMAND_SIZE) {
1252 struct u132_command *command = &ftdi->command[
1253 COMMAND_MASK & ftdi->command_next];
1254 command->header = 0x00 | cPCIu132wr;
1255 command->length = 0x04;
1256 command->address = 0x00;
1257 command->width = 0x00;
1258 command->follows = 4;
1259 command->value = data;
1260 command->buffer = &command->value;
1261 ftdi->command_next += 1;
1262 ftdi_elan_kick_command_queue(ftdi);
1263 mutex_unlock(&ftdi->u132_lock);
1264 return 0;
1265 } else {
1266 mutex_unlock(&ftdi->u132_lock);
1267 msleep(100);
1268 goto wait;
1269 }
1270 }
1271}
1272
1273static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1274 u8 width, u32 data)
1275{
1276 u8 addressofs = config_offset / 4;
1277wait:if (ftdi->disconnected > 0) {
1278 return -ENODEV;
1279 } else {
1280 int command_size;
1281 mutex_lock(&ftdi->u132_lock);
1282 command_size = ftdi->command_next - ftdi->command_head;
1283 if (command_size < COMMAND_SIZE) {
1284 struct u132_command *command = &ftdi->command[
1285 COMMAND_MASK & ftdi->command_next];
1286 command->header = 0x00 | (cPCIcfgwr & 0x0F);
1287 command->length = 0x04;
1288 command->address = addressofs;
1289 command->width = 0x00 | (width & 0x0F);
1290 command->follows = 4;
1291 command->value = data;
1292 command->buffer = &command->value;
1293 ftdi->command_next += 1;
1294 ftdi_elan_kick_command_queue(ftdi);
1295 mutex_unlock(&ftdi->u132_lock);
1296 return 0;
1297 } else {
1298 mutex_unlock(&ftdi->u132_lock);
1299 msleep(100);
1300 goto wait;
1301 }
1302 }
1303}
1304
1305static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1306 u8 width, u32 data)
1307{
1308 u8 addressofs = mem_offset / 4;
1309wait:if (ftdi->disconnected > 0) {
1310 return -ENODEV;
1311 } else {
1312 int command_size;
1313 mutex_lock(&ftdi->u132_lock);
1314 command_size = ftdi->command_next - ftdi->command_head;
1315 if (command_size < COMMAND_SIZE) {
1316 struct u132_command *command = &ftdi->command[
1317 COMMAND_MASK & ftdi->command_next];
1318 command->header = 0x00 | (cPCImemwr & 0x0F);
1319 command->length = 0x04;
1320 command->address = addressofs;
1321 command->width = 0x00 | (width & 0x0F);
1322 command->follows = 4;
1323 command->value = data;
1324 command->buffer = &command->value;
1325 ftdi->command_next += 1;
1326 ftdi_elan_kick_command_queue(ftdi);
1327 mutex_unlock(&ftdi->u132_lock);
1328 return 0;
1329 } else {
1330 mutex_unlock(&ftdi->u132_lock);
1331 msleep(100);
1332 goto wait;
1333 }
1334 }
1335}
1336
1337int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1338 u8 width, u32 data)
1339{
1340 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1341 return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1342}
1343
1344
1345EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1346static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1347{
1348wait:if (ftdi->disconnected > 0) {
1349 return -ENODEV;
1350 } else {
1351 int command_size;
1352 int respond_size;
1353 mutex_lock(&ftdi->u132_lock);
1354 command_size = ftdi->command_next - ftdi->command_head;
1355 respond_size = ftdi->respond_next - ftdi->respond_head;
1356 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1357 {
1358 struct u132_command *command = &ftdi->command[
1359 COMMAND_MASK & ftdi->command_next];
1360 struct u132_respond *respond = &ftdi->respond[
1361 RESPOND_MASK & ftdi->respond_next];
1362 int result = -ENODEV;
1363 respond->result = &result;
1364 respond->header = command->header = 0x00 | cPCIu132rd;
1365 command->length = 0x04;
1366 respond->address = command->address = cU132cmd_status;
1367 command->width = 0x00;
1368 command->follows = 0;
1369 command->value = 0;
1370 command->buffer = NULL;
1371 respond->value = data;
1372 init_completion(&respond->wait_completion);
1373 ftdi->command_next += 1;
1374 ftdi->respond_next += 1;
1375 ftdi_elan_kick_command_queue(ftdi);
1376 mutex_unlock(&ftdi->u132_lock);
1377 wait_for_completion(&respond->wait_completion);
1378 return result;
1379 } else {
1380 mutex_unlock(&ftdi->u132_lock);
1381 msleep(100);
1382 goto wait;
1383 }
1384 }
1385}
1386
1387static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1388 u8 width, u32 *data)
1389{
1390 u8 addressofs = config_offset / 4;
1391wait:if (ftdi->disconnected > 0) {
1392 return -ENODEV;
1393 } else {
1394 int command_size;
1395 int respond_size;
1396 mutex_lock(&ftdi->u132_lock);
1397 command_size = ftdi->command_next - ftdi->command_head;
1398 respond_size = ftdi->respond_next - ftdi->respond_head;
1399 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1400 {
1401 struct u132_command *command = &ftdi->command[
1402 COMMAND_MASK & ftdi->command_next];
1403 struct u132_respond *respond = &ftdi->respond[
1404 RESPOND_MASK & ftdi->respond_next];
1405 int result = -ENODEV;
1406 respond->result = &result;
1407 respond->header = command->header = 0x00 | (cPCIcfgrd &
1408 0x0F);
1409 command->length = 0x04;
1410 respond->address = command->address = addressofs;
1411 command->width = 0x00 | (width & 0x0F);
1412 command->follows = 0;
1413 command->value = 0;
1414 command->buffer = NULL;
1415 respond->value = data;
1416 init_completion(&respond->wait_completion);
1417 ftdi->command_next += 1;
1418 ftdi->respond_next += 1;
1419 ftdi_elan_kick_command_queue(ftdi);
1420 mutex_unlock(&ftdi->u132_lock);
1421 wait_for_completion(&respond->wait_completion);
1422 return result;
1423 } else {
1424 mutex_unlock(&ftdi->u132_lock);
1425 msleep(100);
1426 goto wait;
1427 }
1428 }
1429}
1430
1431static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1432 u8 width, u32 *data)
1433{
1434 u8 addressofs = mem_offset / 4;
1435wait:if (ftdi->disconnected > 0) {
1436 return -ENODEV;
1437 } else {
1438 int command_size;
1439 int respond_size;
1440 mutex_lock(&ftdi->u132_lock);
1441 command_size = ftdi->command_next - ftdi->command_head;
1442 respond_size = ftdi->respond_next - ftdi->respond_head;
1443 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1444 {
1445 struct u132_command *command = &ftdi->command[
1446 COMMAND_MASK & ftdi->command_next];
1447 struct u132_respond *respond = &ftdi->respond[
1448 RESPOND_MASK & ftdi->respond_next];
1449 int result = -ENODEV;
1450 respond->result = &result;
1451 respond->header = command->header = 0x00 | (cPCImemrd &
1452 0x0F);
1453 command->length = 0x04;
1454 respond->address = command->address = addressofs;
1455 command->width = 0x00 | (width & 0x0F);
1456 command->follows = 0;
1457 command->value = 0;
1458 command->buffer = NULL;
1459 respond->value = data;
1460 init_completion(&respond->wait_completion);
1461 ftdi->command_next += 1;
1462 ftdi->respond_next += 1;
1463 ftdi_elan_kick_command_queue(ftdi);
1464 mutex_unlock(&ftdi->u132_lock);
1465 wait_for_completion(&respond->wait_completion);
1466 return result;
1467 } else {
1468 mutex_unlock(&ftdi->u132_lock);
1469 msleep(100);
1470 goto wait;
1471 }
1472 }
1473}
1474
1475int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1476 u8 width, u32 *data)
1477{
1478 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1479 if (ftdi->initialized == 0) {
1480 return -ENODEV;
1481 } else
1482 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1483}
1484
1485
1486EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1487static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1488 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1489 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1490 int toggle_bits, int error_count, int condition_code, int repeat_number,
1491 int halted, int skipped, int actual, int non_null))
1492{
1493 u8 ed = ed_number - 1;
1494wait:if (ftdi->disconnected > 0) {
1495 return -ENODEV;
1496 } else if (ftdi->initialized == 0) {
1497 return -ENODEV;
1498 } else {
1499 int command_size;
1500 mutex_lock(&ftdi->u132_lock);
1501 command_size = ftdi->command_next - ftdi->command_head;
1502 if (command_size < COMMAND_SIZE) {
1503 struct u132_target *target = &ftdi->target[ed];
1504 struct u132_command *command = &ftdi->command[
1505 COMMAND_MASK & ftdi->command_next];
1506 command->header = 0x80 | (ed << 5);
1507 command->length = 0x8007;
1508 command->address = (toggle_bits << 6) | (ep_number << 2)
1509 | (address << 0);
1510 command->width = usb_maxpacket(urb->dev, urb->pipe,
1511 usb_pipeout(urb->pipe));
1512 command->follows = 8;
1513 command->value = 0;
1514 command->buffer = urb->setup_packet;
1515 target->callback = callback;
1516 target->endp = endp;
1517 target->urb = urb;
1518 target->active = 1;
1519 ftdi->command_next += 1;
1520 ftdi_elan_kick_command_queue(ftdi);
1521 mutex_unlock(&ftdi->u132_lock);
1522 return 0;
1523 } else {
1524 mutex_unlock(&ftdi->u132_lock);
1525 msleep(100);
1526 goto wait;
1527 }
1528 }
1529}
1530
1531int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1532 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1533 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1534 int toggle_bits, int error_count, int condition_code, int repeat_number,
1535 int halted, int skipped, int actual, int non_null))
1536{
1537 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1538 return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1539 ep_number, toggle_bits, callback);
1540}
1541
1542
1543EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1544static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1545 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1546 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1547 int toggle_bits, int error_count, int condition_code, int repeat_number,
1548 int halted, int skipped, int actual, int non_null))
1549{
1550 u8 ed = ed_number - 1;
1551wait:if (ftdi->disconnected > 0) {
1552 return -ENODEV;
1553 } else if (ftdi->initialized == 0) {
1554 return -ENODEV;
1555 } else {
1556 int command_size;
1557 mutex_lock(&ftdi->u132_lock);
1558 command_size = ftdi->command_next - ftdi->command_head;
1559 if (command_size < COMMAND_SIZE) {
1560 struct u132_target *target = &ftdi->target[ed];
1561 struct u132_command *command = &ftdi->command[
1562 COMMAND_MASK & ftdi->command_next];
1563 u32 remaining_length = urb->transfer_buffer_length -
1564 urb->actual_length;
1565 command->header = 0x82 | (ed << 5);
1566 if (remaining_length == 0) {
1567 command->length = 0x0000;
1568 } else if (remaining_length > 1024) {
1569 command->length = 0x8000 | 1023;
1570 } else
1571 command->length = 0x8000 | (remaining_length -
1572 1);
1573 command->address = (toggle_bits << 6) | (ep_number << 2)
1574 | (address << 0);
1575 command->width = usb_maxpacket(urb->dev, urb->pipe,
1576 usb_pipeout(urb->pipe));
1577 command->follows = 0;
1578 command->value = 0;
1579 command->buffer = NULL;
1580 target->callback = callback;
1581 target->endp = endp;
1582 target->urb = urb;
1583 target->active = 1;
1584 ftdi->command_next += 1;
1585 ftdi_elan_kick_command_queue(ftdi);
1586 mutex_unlock(&ftdi->u132_lock);
1587 return 0;
1588 } else {
1589 mutex_unlock(&ftdi->u132_lock);
1590 msleep(100);
1591 goto wait;
1592 }
1593 }
1594}
1595
1596int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1597 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1598 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1599 int toggle_bits, int error_count, int condition_code, int repeat_number,
1600 int halted, int skipped, int actual, int non_null))
1601{
1602 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1603 return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1604 ep_number, toggle_bits, callback);
1605}
1606
1607
1608EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1609static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1610 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1611 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1612 int toggle_bits, int error_count, int condition_code, int repeat_number,
1613 int halted, int skipped, int actual, int non_null))
1614{
1615 u8 ed = ed_number - 1;
1616wait:if (ftdi->disconnected > 0) {
1617 return -ENODEV;
1618 } else if (ftdi->initialized == 0) {
1619 return -ENODEV;
1620 } else {
1621 int command_size;
1622 mutex_lock(&ftdi->u132_lock);
1623 command_size = ftdi->command_next - ftdi->command_head;
1624 if (command_size < COMMAND_SIZE) {
1625 struct u132_target *target = &ftdi->target[ed];
1626 struct u132_command *command = &ftdi->command[
1627 COMMAND_MASK & ftdi->command_next];
1628 command->header = 0x81 | (ed << 5);
1629 command->length = 0x0000;
1630 command->address = (toggle_bits << 6) | (ep_number << 2)
1631 | (address << 0);
1632 command->width = usb_maxpacket(urb->dev, urb->pipe,
1633 usb_pipeout(urb->pipe));
1634 command->follows = 0;
1635 command->value = 0;
1636 command->buffer = NULL;
1637 target->callback = callback;
1638 target->endp = endp;
1639 target->urb = urb;
1640 target->active = 1;
1641 ftdi->command_next += 1;
1642 ftdi_elan_kick_command_queue(ftdi);
1643 mutex_unlock(&ftdi->u132_lock);
1644 return 0;
1645 } else {
1646 mutex_unlock(&ftdi->u132_lock);
1647 msleep(100);
1648 goto wait;
1649 }
1650 }
1651}
1652
1653int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1654 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1655 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1656 int toggle_bits, int error_count, int condition_code, int repeat_number,
1657 int halted, int skipped, int actual, int non_null))
1658{
1659 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1660 return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1661 ep_number, toggle_bits, callback);
1662}
1663
1664
1665EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1666static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1667 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1668 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1669 int toggle_bits, int error_count, int condition_code, int repeat_number,
1670 int halted, int skipped, int actual, int non_null))
1671{
1672 u8 ed = ed_number - 1;
1673wait:if (ftdi->disconnected > 0) {
1674 return -ENODEV;
1675 } else if (ftdi->initialized == 0) {
1676 return -ENODEV;
1677 } else {
1678 int command_size;
1679 mutex_lock(&ftdi->u132_lock);
1680 command_size = ftdi->command_next - ftdi->command_head;
1681 if (command_size < COMMAND_SIZE) {
1682 u8 *b;
1683 u16 urb_size;
1684 int i = 0;
1685 char data[30 *3 + 4];
1686 char *d = data;
1687 int m = (sizeof(data) - 1) / 3;
1688 int l = 0;
1689 struct u132_target *target = &ftdi->target[ed];
1690 struct u132_command *command = &ftdi->command[
1691 COMMAND_MASK & ftdi->command_next];
1692 command->header = 0x81 | (ed << 5);
1693 command->address = (toggle_bits << 6) | (ep_number << 2)
1694 | (address << 0);
1695 command->width = usb_maxpacket(urb->dev, urb->pipe,
1696 usb_pipeout(urb->pipe));
1697 command->follows = min_t(u32, 1024,
1698 urb->transfer_buffer_length -
1699 urb->actual_length);
1700 command->value = 0;
1701 command->buffer = urb->transfer_buffer +
1702 urb->actual_length;
1703 command->length = 0x8000 | (command->follows - 1);
1704 b = command->buffer;
1705 urb_size = command->follows;
1706 data[0] = 0;
1707 while (urb_size-- > 0) {
1708 if (i > m) {
1709 } else if (i++ < m) {
1710 int w = sprintf(d, " %02X", *b++);
1711 d += w;
1712 l += w;
1713 } else
1714 d += sprintf(d, " ..");
1715 }
1716 target->callback = callback;
1717 target->endp = endp;
1718 target->urb = urb;
1719 target->active = 1;
1720 ftdi->command_next += 1;
1721 ftdi_elan_kick_command_queue(ftdi);
1722 mutex_unlock(&ftdi->u132_lock);
1723 return 0;
1724 } else {
1725 mutex_unlock(&ftdi->u132_lock);
1726 msleep(100);
1727 goto wait;
1728 }
1729 }
1730}
1731
1732int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1733 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1734 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1735 int toggle_bits, int error_count, int condition_code, int repeat_number,
1736 int halted, int skipped, int actual, int non_null))
1737{
1738 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1739 return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1740 ep_number, toggle_bits, callback);
1741}
1742
1743
1744EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1745static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1746 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1747 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1748 int toggle_bits, int error_count, int condition_code, int repeat_number,
1749 int halted, int skipped, int actual, int non_null))
1750{
1751 u8 ed = ed_number - 1;
1752wait:if (ftdi->disconnected > 0) {
1753 return -ENODEV;
1754 } else if (ftdi->initialized == 0) {
1755 return -ENODEV;
1756 } else {
1757 int command_size;
1758 mutex_lock(&ftdi->u132_lock);
1759 command_size = ftdi->command_next - ftdi->command_head;
1760 if (command_size < COMMAND_SIZE) {
1761 u32 remaining_length = urb->transfer_buffer_length -
1762 urb->actual_length;
1763 struct u132_target *target = &ftdi->target[ed];
1764 struct u132_command *command = &ftdi->command[
1765 COMMAND_MASK & ftdi->command_next];
1766 command->header = 0x83 | (ed << 5);
1767 if (remaining_length == 0) {
1768 command->length = 0x0000;
1769 } else if (remaining_length > 1024) {
1770 command->length = 0x8000 | 1023;
1771 } else
1772 command->length = 0x8000 | (remaining_length -
1773 1);
1774 command->address = (toggle_bits << 6) | (ep_number << 2)
1775 | (address << 0);
1776 command->width = usb_maxpacket(urb->dev, urb->pipe,
1777 usb_pipeout(urb->pipe));
1778 command->follows = 0;
1779 command->value = 0;
1780 command->buffer = NULL;
1781 target->callback = callback;
1782 target->endp = endp;
1783 target->urb = urb;
1784 target->active = 1;
1785 ftdi->command_next += 1;
1786 ftdi_elan_kick_command_queue(ftdi);
1787 mutex_unlock(&ftdi->u132_lock);
1788 return 0;
1789 } else {
1790 mutex_unlock(&ftdi->u132_lock);
1791 msleep(100);
1792 goto wait;
1793 }
1794 }
1795}
1796
1797int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1798 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1799 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1800 int toggle_bits, int error_count, int condition_code, int repeat_number,
1801 int halted, int skipped, int actual, int non_null))
1802{
1803 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1804 return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1805 ep_number, toggle_bits, callback);
1806}
1807
1808
1809EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1810static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1811 void *endp)
1812{
1813 u8 ed = ed_number - 1;
1814 if (ftdi->disconnected > 0) {
1815 return -ENODEV;
1816 } else if (ftdi->initialized == 0) {
1817 return -ENODEV;
1818 } else {
1819 struct u132_target *target = &ftdi->target[ed];
1820 mutex_lock(&ftdi->u132_lock);
1821 if (target->abandoning > 0) {
1822 mutex_unlock(&ftdi->u132_lock);
1823 return 0;
1824 } else {
1825 target->abandoning = 1;
1826 wait_1:if (target->active == 1) {
1827 int command_size = ftdi->command_next -
1828 ftdi->command_head;
1829 if (command_size < COMMAND_SIZE) {
1830 struct u132_command *command =
1831 &ftdi->command[COMMAND_MASK &
1832 ftdi->command_next];
1833 command->header = 0x80 | (ed << 5) |
1834 0x4;
1835 command->length = 0x00;
1836 command->address = 0x00;
1837 command->width = 0x00;
1838 command->follows = 0;
1839 command->value = 0;
1840 command->buffer = &command->value;
1841 ftdi->command_next += 1;
1842 ftdi_elan_kick_command_queue(ftdi);
1843 } else {
1844 mutex_unlock(&ftdi->u132_lock);
1845 msleep(100);
1846 mutex_lock(&ftdi->u132_lock);
1847 goto wait_1;
1848 }
1849 }
1850 mutex_unlock(&ftdi->u132_lock);
1851 return 0;
1852 }
1853 }
1854}
1855
1856int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1857 void *endp)
1858{
1859 struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1860 return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1861}
1862
1863
1864EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1865static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1866{
1867 int retry_on_empty = 10;
1868 int retry_on_timeout = 5;
1869 int retry_on_status = 20;
1870more:{
1871 int packet_bytes = 0;
1872 int retval = usb_bulk_msg(ftdi->udev,
1873 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1874 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1875 &packet_bytes, 100);
1876 if (packet_bytes > 2) {
1877 char diag[30 *3 + 4];
1878 char *d = diag;
1879 int m = (sizeof(diag) - 1) / 3;
1880 char *b = ftdi->bulk_in_buffer;
1881 int bytes_read = 0;
1882 diag[0] = 0;
1883 while (packet_bytes-- > 0) {
1884 char c = *b++;
1885 if (bytes_read < m) {
1886 d += sprintf(d, " %02X",
1887 0x000000FF & c);
1888 } else if (bytes_read > m) {
1889 } else
1890 d += sprintf(d, " ..");
1891 bytes_read += 1;
1892 continue;
1893 }
1894 goto more;
1895 } else if (packet_bytes > 1) {
1896 char s1 = ftdi->bulk_in_buffer[0];
1897 char s2 = ftdi->bulk_in_buffer[1];
1898 if (s1 == 0x31 && s2 == 0x60) {
1899 return 0;
1900 } else if (retry_on_status-- > 0) {
1901 goto more;
1902 } else {
1903 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1904 return -EFAULT;
1905 }
1906 } else if (packet_bytes > 0) {
1907 char b1 = ftdi->bulk_in_buffer[0];
1908 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1909 b1);
1910 if (retry_on_status-- > 0) {
1911 goto more;
1912 } else {
1913 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1914 return -EFAULT;
1915 }
1916 } else if (retval == -ETIMEDOUT) {
1917 if (retry_on_timeout-- > 0) {
1918 goto more;
1919 } else {
1920 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1921 return -ENOMEM;
1922 }
1923 } else if (retval == 0) {
1924 if (retry_on_empty-- > 0) {
1925 goto more;
1926 } else {
1927 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1928 return -ENOMEM;
1929 }
1930 } else {
1931 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1932 return retval;
1933 }
1934 }
1935 return -1;
1936}
1937
1938
1939/*
1940 * send the long flush sequence
1941 *
1942 */
1943static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1944{
1945 int retval;
1946 struct urb *urb;
1947 char *buf;
1948 int I = 257;
1949 int i = 0;
1950 urb = usb_alloc_urb(0, GFP_KERNEL);
1951 if (!urb) {
1952 dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequence\n");
1953 return -ENOMEM;
1954 }
1955 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1956 if (!buf) {
1957 dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1958 usb_free_urb(urb);
1959 return -ENOMEM;
1960 }
1961 while (I-- > 0)
1962 buf[i++] = 0x55;
1963 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1964 ftdi->bulk_out_endpointAddr), buf, i,
1965 ftdi_elan_write_bulk_callback, ftdi);
1966 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1967 retval = usb_submit_urb(urb, GFP_KERNEL);
1968 if (retval) {
1969 dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1970 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1971 usb_free_urb(urb);
1972 return -ENOMEM;
1973 }
1974 usb_free_urb(urb);
1975 return 0;
1976}
1977
1978
1979/*
1980 * send the reset sequence
1981 *
1982 */
1983static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1984{
1985 int retval;
1986 struct urb *urb;
1987 char *buf;
1988 int I = 4;
1989 int i = 0;
1990 urb = usb_alloc_urb(0, GFP_KERNEL);
1991 if (!urb) {
1992 dev_err(&ftdi->udev->dev, "could not get a urb for the reset sequence\n");
1993 return -ENOMEM;
1994 }
1995 buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1996 if (!buf) {
1997 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1998 usb_free_urb(urb);
1999 return -ENOMEM;
2000 }
2001 buf[i++] = 0x55;
2002 buf[i++] = 0xAA;
2003 buf[i++] = 0x5A;
2004 buf[i++] = 0xA5;
2005 usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2006 ftdi->bulk_out_endpointAddr), buf, i,
2007 ftdi_elan_write_bulk_callback, ftdi);
2008 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2009 retval = usb_submit_urb(urb, GFP_KERNEL);
2010 if (retval) {
2011 dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
2012 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
2013 usb_free_urb(urb);
2014 return -ENOMEM;
2015 }
2016 usb_free_urb(urb);
2017 return 0;
2018}
2019
2020static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2021{
2022 int retval;
2023 int long_stop = 10;
2024 int retry_on_timeout = 5;
2025 int retry_on_empty = 10;
2026 int err_count = 0;
2027 retval = ftdi_elan_flush_input_fifo(ftdi);
2028 if (retval)
2029 return retval;
2030 ftdi->bulk_in_left = 0;
2031 ftdi->bulk_in_last = -1;
2032 while (long_stop-- > 0) {
2033 int read_stop;
2034 int read_stuck;
2035 retval = ftdi_elan_synchronize_flush(ftdi);
2036 if (retval)
2037 return retval;
2038 retval = ftdi_elan_flush_input_fifo(ftdi);
2039 if (retval)
2040 return retval;
2041 reset:retval = ftdi_elan_synchronize_reset(ftdi);
2042 if (retval)
2043 return retval;
2044 read_stop = 100;
2045 read_stuck = 10;
2046 read:{
2047 int packet_bytes = 0;
2048 retval = usb_bulk_msg(ftdi->udev,
2049 usb_rcvbulkpipe(ftdi->udev,
2050 ftdi->bulk_in_endpointAddr),
2051 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2052 &packet_bytes, 500);
2053 if (packet_bytes > 2) {
2054 char diag[30 *3 + 4];
2055 char *d = diag;
2056 int m = (sizeof(diag) - 1) / 3;
2057 char *b = ftdi->bulk_in_buffer;
2058 int bytes_read = 0;
2059 unsigned char c = 0;
2060 diag[0] = 0;
2061 while (packet_bytes-- > 0) {
2062 c = *b++;
2063 if (bytes_read < m) {
2064 d += sprintf(d, " %02X", c);
2065 } else if (bytes_read > m) {
2066 } else
2067 d += sprintf(d, " ..");
2068 bytes_read += 1;
2069 continue;
2070 }
2071 if (c == 0x7E) {
2072 return 0;
2073 } else {
2074 if (c == 0x55) {
2075 goto read;
2076 } else if (read_stop-- > 0) {
2077 goto read;
2078 } else {
2079 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2080 continue;
2081 }
2082 }
2083 } else if (packet_bytes > 1) {
2084 unsigned char s1 = ftdi->bulk_in_buffer[0];
2085 unsigned char s2 = ftdi->bulk_in_buffer[1];
2086 if (s1 == 0x31 && s2 == 0x00) {
2087 if (read_stuck-- > 0) {
2088 goto read;
2089 } else
2090 goto reset;
2091 } else if (s1 == 0x31 && s2 == 0x60) {
2092 if (read_stop-- > 0) {
2093 goto read;
2094 } else {
2095 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2096 continue;
2097 }
2098 } else {
2099 if (read_stop-- > 0) {
2100 goto read;
2101 } else {
2102 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2103 continue;
2104 }
2105 }
2106 } else if (packet_bytes > 0) {
2107 if (read_stop-- > 0) {
2108 goto read;
2109 } else {
2110 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2111 continue;
2112 }
2113 } else if (retval == -ETIMEDOUT) {
2114 if (retry_on_timeout-- > 0) {
2115 goto read;
2116 } else {
2117 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2118 continue;
2119 }
2120 } else if (retval == 0) {
2121 if (retry_on_empty-- > 0) {
2122 goto read;
2123 } else {
2124 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2125 continue;
2126 }
2127 } else {
2128 err_count += 1;
2129 dev_err(&ftdi->udev->dev, "error = %d\n",
2130 retval);
2131 if (read_stop-- > 0) {
2132 goto read;
2133 } else {
2134 dev_err(&ftdi->udev->dev, "retry limit reached\n");
2135 continue;
2136 }
2137 }
2138 }
2139 }
2140 dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2141 return -EFAULT;
2142}
2143
2144static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2145{
2146 int retry_on_empty = 10;
2147 int retry_on_timeout = 5;
2148 int retry_on_status = 50;
2149more:{
2150 int packet_bytes = 0;
2151 int retval = usb_bulk_msg(ftdi->udev,
2152 usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2153 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2154 &packet_bytes, 1000);
2155 if (packet_bytes > 2) {
2156 char diag[30 *3 + 4];
2157 char *d = diag;
2158 int m = (sizeof(diag) - 1) / 3;
2159 char *b = ftdi->bulk_in_buffer;
2160 int bytes_read = 0;
2161 diag[0] = 0;
2162 while (packet_bytes-- > 0) {
2163 char c = *b++;
2164 if (bytes_read < m) {
2165 d += sprintf(d, " %02X",
2166 0x000000FF & c);
2167 } else if (bytes_read > m) {
2168 } else
2169 d += sprintf(d, " ..");
2170 bytes_read += 1;
2171 continue;
2172 }
2173 goto more;
2174 } else if (packet_bytes > 1) {
2175 char s1 = ftdi->bulk_in_buffer[0];
2176 char s2 = ftdi->bulk_in_buffer[1];
2177 if (s1 == 0x31 && s2 == 0x60) {
2178 return 0;
2179 } else if (retry_on_status-- > 0) {
2180 msleep(5);
2181 goto more;
2182 } else
2183 return -EFAULT;
2184 } else if (packet_bytes > 0) {
2185 char b1 = ftdi->bulk_in_buffer[0];
2186 dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2187 if (retry_on_status-- > 0) {
2188 msleep(5);
2189 goto more;
2190 } else {
2191 dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2192 return -EFAULT;
2193 }
2194 } else if (retval == -ETIMEDOUT) {
2195 if (retry_on_timeout-- > 0) {
2196 goto more;
2197 } else {
2198 dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2199 return -ENOMEM;
2200 }
2201 } else if (retval == 0) {
2202 if (retry_on_empty-- > 0) {
2203 goto more;
2204 } else {
2205 dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2206 return -ENOMEM;
2207 }
2208 } else {
2209 dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2210 return -ENOMEM;
2211 }
2212 }
2213 return -1;
2214}
2215
2216static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2217{
2218 int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2219 if (UxxxStatus)
2220 return UxxxStatus;
2221 if (ftdi->controlreg & 0x00400000) {
2222 if (ftdi->card_ejected) {
2223 } else {
2224 ftdi->card_ejected = 1;
2225 dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2226 ftdi->controlreg);
2227 }
2228 return -ENODEV;
2229 } else {
2230 u8 fn = ftdi->function - 1;
2231 int activePCIfn = fn << 8;
2232 u32 pcidata;
2233 u32 pciVID;
2234 u32 pciPID;
2235 int reg = 0;
2236 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2237 &pcidata);
2238 if (UxxxStatus)
2239 return UxxxStatus;
2240 pciVID = pcidata & 0xFFFF;
2241 pciPID = (pcidata >> 16) & 0xFFFF;
2242 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2243 ftdi->platform_data.device) {
2244 return 0;
2245 } else {
2246 dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2247 ftdi->platform_data.vendor, pciVID,
2248 ftdi->platform_data.device, pciPID);
2249 return -ENODEV;
2250 }
2251 }
2252}
2253
2254
2255#define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2256 offsetof(struct ohci_regs, member), 0, data);
2257#define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2258 offsetof(struct ohci_regs, member), 0, data);
2259
2260#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2261#define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2262 OHCI_INTR_WDH)
2263static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2264{
2265 int devices = 0;
2266 int retval;
2267 u32 hc_control;
2268 int num_ports;
2269 u32 control;
2270 u32 rh_a = -1;
2271 u32 status;
2272 u32 fminterval;
2273 u32 hc_fminterval;
2274 u32 periodicstart;
2275 u32 cmdstatus;
2276 u32 roothub_a;
2277 int mask = OHCI_INTR_INIT;
2278 int sleep_time = 0;
2279 int reset_timeout = 30; /* ... allow extra time */
2280 int temp;
2281 retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2282 if (retval)
2283 return retval;
2284 retval = ftdi_read_pcimem(ftdi, control, &control);
2285 if (retval)
2286 return retval;
2287 retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2288 if (retval)
2289 return retval;
2290 num_ports = rh_a & RH_A_NDP;
2291 retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2292 if (retval)
2293 return retval;
2294 hc_fminterval &= 0x3fff;
2295 if (hc_fminterval != FI) {
2296 }
2297 hc_fminterval |= FSMP(hc_fminterval) << 16;
2298 retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2299 if (retval)
2300 return retval;
2301 switch (hc_control & OHCI_CTRL_HCFS) {
2302 case OHCI_USB_OPER:
2303 sleep_time = 0;
2304 break;
2305 case OHCI_USB_SUSPEND:
2306 case OHCI_USB_RESUME:
2307 hc_control &= OHCI_CTRL_RWC;
2308 hc_control |= OHCI_USB_RESUME;
2309 sleep_time = 10;
2310 break;
2311 default:
2312 hc_control &= OHCI_CTRL_RWC;
2313 hc_control |= OHCI_USB_RESET;
2314 sleep_time = 50;
2315 break;
2316 }
2317 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2318 if (retval)
2319 return retval;
2320 retval = ftdi_read_pcimem(ftdi, control, &control);
2321 if (retval)
2322 return retval;
2323 msleep(sleep_time);
2324 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2325 if (retval)
2326 return retval;
2327 if (!(roothub_a & RH_A_NPS)) { /* power down each port */
2328 for (temp = 0; temp < num_ports; temp++) {
2329 retval = ftdi_write_pcimem(ftdi,
2330 roothub.portstatus[temp], RH_PS_LSDA);
2331 if (retval)
2332 return retval;
2333 }
2334 }
2335 retval = ftdi_read_pcimem(ftdi, control, &control);
2336 if (retval)
2337 return retval;
2338retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2339 if (retval)
2340 return retval;
2341 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2342 if (retval)
2343 return retval;
2344extra:{
2345 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2346 if (retval)
2347 return retval;
2348 if (0 != (status & OHCI_HCR)) {
2349 if (--reset_timeout == 0) {
2350 dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2351 return -ENODEV;
2352 } else {
2353 msleep(5);
2354 goto extra;
2355 }
2356 }
2357 }
2358 if (quirk & OHCI_QUIRK_INITRESET) {
2359 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2360 if (retval)
2361 return retval;
2362 retval = ftdi_read_pcimem(ftdi, control, &control);
2363 if (retval)
2364 return retval;
2365 }
2366 retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2367 if (retval)
2368 return retval;
2369 retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2370 if (retval)
2371 return retval;
2372 retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2373 if (retval)
2374 return retval;
2375 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2376 if (retval)
2377 return retval;
2378 retval = ftdi_write_pcimem(ftdi, fminterval,
2379 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2380 if (retval)
2381 return retval;
2382 retval = ftdi_write_pcimem(ftdi, periodicstart,
2383 ((9 *hc_fminterval) / 10) & 0x3fff);
2384 if (retval)
2385 return retval;
2386 retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2387 if (retval)
2388 return retval;
2389 retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2390 if (retval)
2391 return retval;
2392 if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2393 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2394 quirk |= OHCI_QUIRK_INITRESET;
2395 goto retry;
2396 } else
2397 dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2398 fminterval, periodicstart);
2399 } /* start controller operations */
2400 hc_control &= OHCI_CTRL_RWC;
2401 hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2402 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2403 if (retval)
2404 return retval;
2405 retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2406 if (retval)
2407 return retval;
2408 retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2409 if (retval)
2410 return retval;
2411 retval = ftdi_read_pcimem(ftdi, control, &control);
2412 if (retval)
2413 return retval;
2414 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2415 if (retval)
2416 return retval;
2417 retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2418 if (retval)
2419 return retval;
2420 retval = ftdi_write_pcimem(ftdi, intrdisable,
2421 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2422 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2423 OHCI_INTR_SO);
2424 if (retval)
2425 return retval; /* handle root hub init quirks ... */
2426 retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2427 if (retval)
2428 return retval;
2429 roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2430 if (quirk & OHCI_QUIRK_SUPERIO) {
2431 roothub_a |= RH_A_NOCP;
2432 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2433 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2434 if (retval)
2435 return retval;
2436 } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2437 roothub_a |= RH_A_NPS;
2438 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2439 if (retval)
2440 return retval;
2441 }
2442 retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2443 if (retval)
2444 return retval;
2445 retval = ftdi_write_pcimem(ftdi, roothub.b,
2446 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2447 if (retval)
2448 return retval;
2449 retval = ftdi_read_pcimem(ftdi, control, &control);
2450 if (retval)
2451 return retval;
2452 mdelay((roothub_a >> 23) & 0x1fe);
2453 for (temp = 0; temp < num_ports; temp++) {
2454 u32 portstatus;
2455 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2456 &portstatus);
2457 if (retval)
2458 return retval;
2459 if (1 & portstatus)
2460 devices += 1;
2461 }
2462 return devices;
2463}
2464
2465static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2466{
2467 u32 latence_timer;
2468 int UxxxStatus;
2469 u32 pcidata;
2470 int reg = 0;
2471 int activePCIfn = fn << 8;
2472 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2473 if (UxxxStatus)
2474 return UxxxStatus;
2475 reg = 16;
2476 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2477 0xFFFFFFFF);
2478 if (UxxxStatus)
2479 return UxxxStatus;
2480 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2481 &pcidata);
2482 if (UxxxStatus)
2483 return UxxxStatus;
2484 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2485 0xF0000000);
2486 if (UxxxStatus)
2487 return UxxxStatus;
2488 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2489 &pcidata);
2490 if (UxxxStatus)
2491 return UxxxStatus;
2492 reg = 12;
2493 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2494 &latence_timer);
2495 if (UxxxStatus)
2496 return UxxxStatus;
2497 latence_timer &= 0xFFFF00FF;
2498 latence_timer |= 0x00001600;
2499 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2500 latence_timer);
2501 if (UxxxStatus)
2502 return UxxxStatus;
2503 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2504 &pcidata);
2505 if (UxxxStatus)
2506 return UxxxStatus;
2507 reg = 4;
2508 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2509 0x06);
2510 if (UxxxStatus)
2511 return UxxxStatus;
2512 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2513 &pcidata);
2514 if (UxxxStatus)
2515 return UxxxStatus;
2516 for (reg = 0; reg <= 0x54; reg += 4) {
2517 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2518 if (UxxxStatus)
2519 return UxxxStatus;
2520 }
2521 return 0;
2522}
2523
2524static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2525{
2526 u32 latence_timer;
2527 int UxxxStatus;
2528 u32 pcidata;
2529 int reg = 0;
2530 int activePCIfn = fn << 8;
2531 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2532 if (UxxxStatus)
2533 return UxxxStatus;
2534 reg = 16;
2535 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2536 0xFFFFFFFF);
2537 if (UxxxStatus)
2538 return UxxxStatus;
2539 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2540 &pcidata);
2541 if (UxxxStatus)
2542 return UxxxStatus;
2543 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2544 0x00000000);
2545 if (UxxxStatus)
2546 return UxxxStatus;
2547 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2548 &pcidata);
2549 if (UxxxStatus)
2550 return UxxxStatus;
2551 reg = 12;
2552 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2553 &latence_timer);
2554 if (UxxxStatus)
2555 return UxxxStatus;
2556 latence_timer &= 0xFFFF00FF;
2557 latence_timer |= 0x00001600;
2558 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2559 latence_timer);
2560 if (UxxxStatus)
2561 return UxxxStatus;
2562 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2563 &pcidata);
2564 if (UxxxStatus)
2565 return UxxxStatus;
2566 reg = 4;
2567 UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2568 0x00);
2569 if (UxxxStatus)
2570 return UxxxStatus;
2571 return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2572}
2573
2574static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2575{
2576 int result;
2577 int UxxxStatus;
2578 UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2579 if (UxxxStatus)
2580 return UxxxStatus;
2581 result = ftdi_elan_check_controller(ftdi, quirk);
2582 UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2583 if (UxxxStatus)
2584 return UxxxStatus;
2585 return result;
2586}
2587
2588static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2589{
2590 u32 controlreg;
2591 u8 sensebits;
2592 int UxxxStatus;
2593 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2594 if (UxxxStatus)
2595 return UxxxStatus;
2596 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2597 if (UxxxStatus)
2598 return UxxxStatus;
2599 msleep(750);
2600 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2601 if (UxxxStatus)
2602 return UxxxStatus;
2603 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2604 if (UxxxStatus)
2605 return UxxxStatus;
2606 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2607 if (UxxxStatus)
2608 return UxxxStatus;
2609 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2610 if (UxxxStatus)
2611 return UxxxStatus;
2612 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2613 if (UxxxStatus)
2614 return UxxxStatus;
2615 msleep(250);
2616 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2617 if (UxxxStatus)
2618 return UxxxStatus;
2619 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2620 if (UxxxStatus)
2621 return UxxxStatus;
2622 UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2623 if (UxxxStatus)
2624 return UxxxStatus;
2625 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2626 if (UxxxStatus)
2627 return UxxxStatus;
2628 UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2629 if (UxxxStatus)
2630 return UxxxStatus;
2631 msleep(1000);
2632 sensebits = (controlreg >> 16) & 0x000F;
2633 if (0x0D == sensebits)
2634 return 0;
2635 else
2636 return - ENXIO;
2637}
2638
2639static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2640{
2641 int UxxxStatus;
2642 u32 pcidata;
2643 int reg = 0;
2644 u8 fn;
2645 int activePCIfn = 0;
2646 int max_devices = 0;
2647 int controllers = 0;
2648 int unrecognized = 0;
2649 ftdi->function = 0;
2650 for (fn = 0; (fn < 4); fn++) {
2651 u32 pciVID = 0;
2652 u32 pciPID = 0;
2653 int devices = 0;
2654 activePCIfn = fn << 8;
2655 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2656 &pcidata);
2657 if (UxxxStatus)
2658 return UxxxStatus;
2659 pciVID = pcidata & 0xFFFF;
2660 pciPID = (pcidata >> 16) & 0xFFFF;
2661 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2662 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2663 controllers += 1;
2664 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2665 {
2666 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2667 controllers += 1;
2668 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2669 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2670 controllers += 1;
2671 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2672 {
2673 devices = ftdi_elan_found_controller(ftdi, fn, 0);
2674 controllers += 1;
2675 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2676 devices = ftdi_elan_found_controller(ftdi, fn,
2677 OHCI_QUIRK_AMD756);
2678 controllers += 1;
2679 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2680 devices = ftdi_elan_found_controller(ftdi, fn,
2681 OHCI_QUIRK_ZFMICRO);
2682 controllers += 1;
2683 } else if (0 == pcidata) {
2684 } else
2685 unrecognized += 1;
2686 if (devices > max_devices) {
2687 max_devices = devices;
2688 ftdi->function = fn + 1;
2689 ftdi->platform_data.vendor = pciVID;
2690 ftdi->platform_data.device = pciPID;
2691 }
2692 }
2693 if (ftdi->function > 0) {
2694 return ftdi_elan_setup_controller(ftdi, ftdi->function - 1);
2695 } else if (controllers > 0) {
2696 return -ENXIO;
2697 } else if (unrecognized > 0) {
2698 return -ENXIO;
2699 } else {
2700 ftdi->enumerated = 0;
2701 return -ENXIO;
2702 }
2703}
2704
2705
2706/*
2707 * we use only the first bulk-in and bulk-out endpoints
2708 */
2709static int ftdi_elan_probe(struct usb_interface *interface,
2710 const struct usb_device_id *id)
2711{
2712 struct usb_host_interface *iface_desc;
2713 struct usb_endpoint_descriptor *endpoint;
2714 size_t buffer_size;
2715 int i;
2716 int retval = -ENOMEM;
2717 struct usb_ftdi *ftdi;
2718
2719 ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2720 if (!ftdi)
2721 return -ENOMEM;
2722
2723 mutex_lock(&ftdi_module_lock);
2724 list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2725 ftdi->sequence_num = ++ftdi_instances;
2726 mutex_unlock(&ftdi_module_lock);
2727 ftdi_elan_init_kref(ftdi);
2728 sema_init(&ftdi->sw_lock, 1);
2729 ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2730 ftdi->interface = interface;
2731 mutex_init(&ftdi->u132_lock);
2732 ftdi->expected = 4;
2733 iface_desc = interface->cur_altsetting;
2734 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2735 endpoint = &iface_desc->endpoint[i].desc;
2736 if (!ftdi->bulk_in_endpointAddr &&
2737 usb_endpoint_is_bulk_in(endpoint)) {
2738 buffer_size = usb_endpoint_maxp(endpoint);
2739 ftdi->bulk_in_size = buffer_size;
2740 ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2741 ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2742 if (!ftdi->bulk_in_buffer) {
2743 dev_err(&ftdi->udev->dev, "Could not allocate bulk_in_buffer\n");
2744 retval = -ENOMEM;
2745 goto error;
2746 }
2747 }
2748 if (!ftdi->bulk_out_endpointAddr &&
2749 usb_endpoint_is_bulk_out(endpoint)) {
2750 ftdi->bulk_out_endpointAddr =
2751 endpoint->bEndpointAddress;
2752 }
2753 }
2754 if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2755 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2756 retval = -ENODEV;
2757 goto error;
2758 }
2759 dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2760 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2761 ftdi->bulk_out_endpointAddr);
2762 usb_set_intfdata(interface, ftdi);
2763 if (iface_desc->desc.bInterfaceNumber == 0 &&
2764 ftdi->bulk_in_endpointAddr == 0x81 &&
2765 ftdi->bulk_out_endpointAddr == 0x02) {
2766 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2767 if (retval) {
2768 dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2769 usb_set_intfdata(interface, NULL);
2770 retval = -ENOMEM;
2771 goto error;
2772 } else {
2773 ftdi->class = &ftdi_elan_jtag_class;
2774 dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2775 ftdi, iface_desc->desc.bInterfaceNumber,
2776 interface->minor);
2777 return 0;
2778 }
2779 } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2780 ftdi->bulk_in_endpointAddr == 0x83 &&
2781 ftdi->bulk_out_endpointAddr == 0x04) {
2782 ftdi->class = NULL;
2783 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2784 ftdi, iface_desc->desc.bInterfaceNumber);
2785 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2786 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2787 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2788 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2789 return 0;
2790 } else {
2791 dev_err(&ftdi->udev->dev,
2792 "Could not find ELAN's U132 device\n");
2793 retval = -ENODEV;
2794 goto error;
2795 }
2796error:if (ftdi) {
2797 ftdi_elan_put_kref(ftdi);
2798 }
2799 return retval;
2800}
2801
2802static void ftdi_elan_disconnect(struct usb_interface *interface)
2803{
2804 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2805 ftdi->disconnected += 1;
2806 if (ftdi->class) {
2807 int minor = interface->minor;
2808 struct usb_class_driver *class = ftdi->class;
2809 usb_set_intfdata(interface, NULL);
2810 usb_deregister_dev(interface, class);
2811 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2812 minor);
2813 } else {
2814 ftdi_status_cancel_work(ftdi);
2815 ftdi_command_cancel_work(ftdi);
2816 ftdi_response_cancel_work(ftdi);
2817 ftdi_elan_abandon_completions(ftdi);
2818 ftdi_elan_abandon_targets(ftdi);
2819 if (ftdi->registered) {
2820 platform_device_unregister(&ftdi->platform_dev);
2821 ftdi->synchronized = 0;
2822 ftdi->enumerated = 0;
2823 ftdi->initialized = 0;
2824 ftdi->registered = 0;
2825 }
2826 flush_workqueue(status_queue);
2827 flush_workqueue(command_queue);
2828 flush_workqueue(respond_queue);
2829 ftdi->disconnected += 1;
2830 usb_set_intfdata(interface, NULL);
2831 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2832 }
2833 ftdi_elan_put_kref(ftdi);
2834}
2835
2836static struct usb_driver ftdi_elan_driver = {
2837 .name = "ftdi-elan",
2838 .probe = ftdi_elan_probe,
2839 .disconnect = ftdi_elan_disconnect,
2840 .id_table = ftdi_elan_table,
2841};
2842static int __init ftdi_elan_init(void)
2843{
2844 int result;
2845 pr_info("driver %s\n", ftdi_elan_driver.name);
2846 mutex_init(&ftdi_module_lock);
2847 INIT_LIST_HEAD(&ftdi_static_list);
2848 status_queue = create_singlethread_workqueue("ftdi-status-control");
2849 if (!status_queue)
2850 goto err_status_queue;
2851 command_queue = create_singlethread_workqueue("ftdi-command-engine");
2852 if (!command_queue)
2853 goto err_command_queue;
2854 respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2855 if (!respond_queue)
2856 goto err_respond_queue;
2857 result = usb_register(&ftdi_elan_driver);
2858 if (result) {
2859 destroy_workqueue(status_queue);
2860 destroy_workqueue(command_queue);
2861 destroy_workqueue(respond_queue);
2862 pr_err("usb_register failed. Error number %d\n", result);
2863 }
2864 return result;
2865
2866err_respond_queue:
2867 destroy_workqueue(command_queue);
2868err_command_queue:
2869 destroy_workqueue(status_queue);
2870err_status_queue:
2871 pr_err("%s couldn't create workqueue\n", ftdi_elan_driver.name);
2872 return -ENOMEM;
2873}
2874
2875static void __exit ftdi_elan_exit(void)
2876{
2877 struct usb_ftdi *ftdi;
2878 struct usb_ftdi *temp;
2879 usb_deregister(&ftdi_elan_driver);
2880 pr_info("ftdi_u132 driver deregistered\n");
2881 list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2882 ftdi_status_cancel_work(ftdi);
2883 ftdi_command_cancel_work(ftdi);
2884 ftdi_response_cancel_work(ftdi);
2885 } flush_workqueue(status_queue);
2886 destroy_workqueue(status_queue);
2887 status_queue = NULL;
2888 flush_workqueue(command_queue);
2889 destroy_workqueue(command_queue);
2890 command_queue = NULL;
2891 flush_workqueue(respond_queue);
2892 destroy_workqueue(respond_queue);
2893 respond_queue = NULL;
2894}
2895
2896
2897module_init(ftdi_elan_init);
2898module_exit(ftdi_elan_exit);