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