Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * dabusb.c -- dab usb driver. | |
5 | * | |
6 | * Copyright (C) 1999 Deti Fliegl (deti@fliegl.de) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | * | |
23 | * | |
24 | * $Id: dabusb.c,v 1.54 2000/07/24 21:39:39 deti Exp $ | |
25 | * | |
26 | */ | |
27 | ||
28 | /*****************************************************************************/ | |
29 | ||
30 | #include <linux/module.h> | |
31 | #include <linux/socket.h> | |
32 | #include <linux/list.h> | |
33 | #include <linux/vmalloc.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/init.h> | |
36 | #include <asm/uaccess.h> | |
37 | #include <asm/atomic.h> | |
38 | #include <linux/delay.h> | |
39 | #include <linux/usb.h> | |
4186ecf8 | 40 | #include <linux/mutex.h> |
1da177e4 LT |
41 | |
42 | #include "dabusb.h" | |
43 | #include "dabfirmware.h" | |
44 | ||
45 | /* | |
46 | * Version Information | |
47 | */ | |
48 | #define DRIVER_VERSION "v1.54" | |
49 | #define DRIVER_AUTHOR "Deti Fliegl, deti@fliegl.de" | |
50 | #define DRIVER_DESC "DAB-USB Interface Driver for Linux (c)1999" | |
51 | ||
52 | /* --------------------------------------------------------------------- */ | |
53 | ||
54 | #ifdef CONFIG_USB_DYNAMIC_MINORS | |
55 | #define NRDABUSB 256 | |
56 | #else | |
57 | #define NRDABUSB 4 | |
58 | #endif | |
59 | ||
60 | /*-------------------------------------------------------------------*/ | |
61 | ||
62 | static dabusb_t dabusb[NRDABUSB]; | |
63 | static int buffers = 256; | |
64 | static struct usb_driver dabusb_driver; | |
65 | ||
66 | /*-------------------------------------------------------------------*/ | |
67 | ||
68 | static int dabusb_add_buf_tail (pdabusb_t s, struct list_head *dst, struct list_head *src) | |
69 | { | |
70 | unsigned long flags; | |
71 | struct list_head *tmp; | |
72 | int ret = 0; | |
73 | ||
74 | spin_lock_irqsave (&s->lock, flags); | |
75 | ||
76 | if (list_empty (src)) { | |
77 | // no elements in source buffer | |
78 | ret = -1; | |
79 | goto err; | |
80 | } | |
81 | tmp = src->next; | |
82 | list_move_tail (tmp, dst); | |
83 | ||
84 | err: spin_unlock_irqrestore (&s->lock, flags); | |
85 | return ret; | |
86 | } | |
87 | /*-------------------------------------------------------------------*/ | |
d56410e0 | 88 | #ifdef DEBUG |
1da177e4 LT |
89 | static void dump_urb (struct urb *urb) |
90 | { | |
91 | dbg("urb :%p", urb); | |
92 | dbg("dev :%p", urb->dev); | |
93 | dbg("pipe :%08X", urb->pipe); | |
94 | dbg("status :%d", urb->status); | |
95 | dbg("transfer_flags :%08X", urb->transfer_flags); | |
96 | dbg("transfer_buffer :%p", urb->transfer_buffer); | |
97 | dbg("transfer_buffer_length:%d", urb->transfer_buffer_length); | |
98 | dbg("actual_length :%d", urb->actual_length); | |
99 | dbg("setup_packet :%p", urb->setup_packet); | |
100 | dbg("start_frame :%d", urb->start_frame); | |
101 | dbg("number_of_packets :%d", urb->number_of_packets); | |
102 | dbg("interval :%d", urb->interval); | |
103 | dbg("error_count :%d", urb->error_count); | |
104 | dbg("context :%p", urb->context); | |
105 | dbg("complete :%p", urb->complete); | |
106 | } | |
107 | #endif | |
108 | /*-------------------------------------------------------------------*/ | |
109 | static int dabusb_cancel_queue (pdabusb_t s, struct list_head *q) | |
110 | { | |
111 | unsigned long flags; | |
112 | pbuff_t b; | |
113 | ||
114 | dbg("dabusb_cancel_queue"); | |
115 | ||
116 | spin_lock_irqsave (&s->lock, flags); | |
117 | ||
118 | list_for_each_entry(b, q, buff_list) { | |
119 | #ifdef DEBUG | |
120 | dump_urb(b->purb); | |
121 | #endif | |
122 | usb_unlink_urb (b->purb); | |
123 | } | |
124 | spin_unlock_irqrestore (&s->lock, flags); | |
125 | return 0; | |
126 | } | |
127 | /*-------------------------------------------------------------------*/ | |
128 | static int dabusb_free_queue (struct list_head *q) | |
129 | { | |
130 | struct list_head *tmp; | |
131 | struct list_head *p; | |
132 | pbuff_t b; | |
133 | ||
134 | dbg("dabusb_free_queue"); | |
135 | for (p = q->next; p != q;) { | |
136 | b = list_entry (p, buff_t, buff_list); | |
137 | ||
d56410e0 | 138 | #ifdef DEBUG |
1da177e4 LT |
139 | dump_urb(b->purb); |
140 | #endif | |
1bc3c9e1 | 141 | kfree(b->purb->transfer_buffer); |
1da177e4 LT |
142 | usb_free_urb(b->purb); |
143 | tmp = p->next; | |
144 | list_del (p); | |
145 | kfree (b); | |
146 | p = tmp; | |
147 | } | |
148 | ||
149 | return 0; | |
150 | } | |
151 | /*-------------------------------------------------------------------*/ | |
152 | static int dabusb_free_buffers (pdabusb_t s) | |
153 | { | |
154 | unsigned long flags; | |
155 | dbg("dabusb_free_buffers"); | |
156 | ||
157 | spin_lock_irqsave(&s->lock, flags); | |
158 | ||
159 | dabusb_free_queue (&s->free_buff_list); | |
160 | dabusb_free_queue (&s->rec_buff_list); | |
161 | ||
162 | spin_unlock_irqrestore(&s->lock, flags); | |
163 | ||
164 | s->got_mem = 0; | |
165 | return 0; | |
166 | } | |
167 | /*-------------------------------------------------------------------*/ | |
7d12e780 | 168 | static void dabusb_iso_complete (struct urb *purb) |
1da177e4 LT |
169 | { |
170 | pbuff_t b = purb->context; | |
171 | pdabusb_t s = b->s; | |
172 | int i; | |
173 | int len; | |
174 | int dst = 0; | |
175 | void *buf = purb->transfer_buffer; | |
176 | ||
177 | dbg("dabusb_iso_complete"); | |
178 | ||
179 | // process if URB was not killed | |
180 | if (purb->status != -ENOENT) { | |
181 | unsigned int pipe = usb_rcvisocpipe (purb->dev, _DABUSB_ISOPIPE); | |
182 | int pipesize = usb_maxpacket (purb->dev, pipe, usb_pipeout (pipe)); | |
183 | for (i = 0; i < purb->number_of_packets; i++) | |
184 | if (!purb->iso_frame_desc[i].status) { | |
185 | len = purb->iso_frame_desc[i].actual_length; | |
186 | if (len <= pipesize) { | |
187 | memcpy (buf + dst, buf + purb->iso_frame_desc[i].offset, len); | |
188 | dst += len; | |
189 | } | |
190 | else | |
191 | err("dabusb_iso_complete: invalid len %d", len); | |
192 | } | |
193 | else | |
194 | warn("dabusb_iso_complete: corrupted packet status: %d", purb->iso_frame_desc[i].status); | |
195 | if (dst != purb->actual_length) | |
196 | err("dst!=purb->actual_length:%d!=%d", dst, purb->actual_length); | |
197 | } | |
198 | ||
199 | if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) { | |
200 | s->overruns++; | |
201 | err("overrun (%d)", s->overruns); | |
202 | } | |
203 | wake_up (&s->wait); | |
204 | } | |
205 | /*-------------------------------------------------------------------*/ | |
206 | static int dabusb_alloc_buffers (pdabusb_t s) | |
207 | { | |
208 | int buffers = 0; | |
209 | pbuff_t b; | |
210 | unsigned int pipe = usb_rcvisocpipe (s->usbdev, _DABUSB_ISOPIPE); | |
211 | int pipesize = usb_maxpacket (s->usbdev, pipe, usb_pipeout (pipe)); | |
212 | int packets = _ISOPIPESIZE / pipesize; | |
213 | int transfer_buffer_length = packets * pipesize; | |
214 | int i; | |
215 | ||
216 | dbg("dabusb_alloc_buffers pipesize:%d packets:%d transfer_buffer_len:%d", | |
217 | pipesize, packets, transfer_buffer_length); | |
218 | ||
219 | while (buffers < (s->total_buffer_size << 10)) { | |
5cbded58 | 220 | b = kzalloc(sizeof (buff_t), GFP_KERNEL); |
1da177e4 | 221 | if (!b) { |
d8e298dc | 222 | err("kzalloc(sizeof(buff_t))==NULL"); |
1da177e4 LT |
223 | goto err; |
224 | } | |
1da177e4 LT |
225 | b->s = s; |
226 | b->purb = usb_alloc_urb(packets, GFP_KERNEL); | |
227 | if (!b->purb) { | |
228 | err("usb_alloc_urb == NULL"); | |
229 | kfree (b); | |
230 | goto err; | |
231 | } | |
232 | ||
233 | b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL); | |
234 | if (!b->purb->transfer_buffer) { | |
235 | kfree (b->purb); | |
236 | kfree (b); | |
237 | err("kmalloc(%d)==NULL", transfer_buffer_length); | |
238 | goto err; | |
239 | } | |
240 | ||
241 | b->purb->transfer_buffer_length = transfer_buffer_length; | |
242 | b->purb->number_of_packets = packets; | |
243 | b->purb->complete = dabusb_iso_complete; | |
244 | b->purb->context = b; | |
245 | b->purb->dev = s->usbdev; | |
246 | b->purb->pipe = pipe; | |
247 | b->purb->transfer_flags = URB_ISO_ASAP; | |
248 | ||
249 | for (i = 0; i < packets; i++) { | |
250 | b->purb->iso_frame_desc[i].offset = i * pipesize; | |
251 | b->purb->iso_frame_desc[i].length = pipesize; | |
252 | } | |
253 | ||
254 | buffers += transfer_buffer_length; | |
255 | list_add_tail (&b->buff_list, &s->free_buff_list); | |
256 | } | |
257 | s->got_mem = buffers; | |
258 | ||
259 | return 0; | |
260 | ||
261 | err: | |
262 | dabusb_free_buffers (s); | |
263 | return -ENOMEM; | |
264 | } | |
265 | /*-------------------------------------------------------------------*/ | |
266 | static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb) | |
267 | { | |
268 | int ret; | |
269 | unsigned int pipe; | |
270 | int actual_length; | |
271 | ||
272 | dbg("dabusb_bulk"); | |
273 | ||
274 | if (!pb->pipe) | |
275 | pipe = usb_rcvbulkpipe (s->usbdev, 2); | |
276 | else | |
277 | pipe = usb_sndbulkpipe (s->usbdev, 2); | |
278 | ||
279 | ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100); | |
280 | if(ret<0) { | |
281 | err("dabusb: usb_bulk_msg failed(%d)",ret); | |
282 | ||
283 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
284 | err("set_interface failed"); | |
285 | return -EINVAL; | |
286 | } | |
287 | ||
288 | } | |
d56410e0 | 289 | |
1da177e4 LT |
290 | if( ret == -EPIPE ) { |
291 | warn("CLEAR_FEATURE request to remove STALL condition."); | |
292 | if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe))) | |
293 | err("request failed"); | |
294 | } | |
295 | ||
296 | pb->size = actual_length; | |
297 | return ret; | |
298 | } | |
299 | /* --------------------------------------------------------------------- */ | |
300 | static int dabusb_writemem (pdabusb_t s, int pos, unsigned char *data, int len) | |
301 | { | |
302 | int ret; | |
303 | unsigned char *transfer_buffer = kmalloc (len, GFP_KERNEL); | |
304 | ||
305 | if (!transfer_buffer) { | |
306 | err("dabusb_writemem: kmalloc(%d) failed.", len); | |
307 | return -ENOMEM; | |
308 | } | |
309 | ||
310 | memcpy (transfer_buffer, data, len); | |
311 | ||
312 | ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300); | |
313 | ||
314 | kfree (transfer_buffer); | |
315 | return ret; | |
316 | } | |
317 | /* --------------------------------------------------------------------- */ | |
318 | static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit) | |
319 | { | |
320 | dbg("dabusb_8051_reset: %d",reset_bit); | |
321 | return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1); | |
322 | } | |
323 | /* --------------------------------------------------------------------- */ | |
324 | static int dabusb_loadmem (pdabusb_t s, const char *fname) | |
325 | { | |
326 | int ret; | |
327 | PINTEL_HEX_RECORD ptr = firmware; | |
328 | ||
329 | dbg("Enter dabusb_loadmem (internal)"); | |
d56410e0 | 330 | |
1da177e4 LT |
331 | ret = dabusb_8051_reset (s, 1); |
332 | while (ptr->Type == 0) { | |
333 | ||
334 | dbg("dabusb_writemem: %04X %p %d)", ptr->Address, ptr->Data, ptr->Length); | |
335 | ||
336 | ret = dabusb_writemem (s, ptr->Address, ptr->Data, ptr->Length); | |
337 | if (ret < 0) { | |
338 | err("dabusb_writemem failed (%d %04X %p %d)", ret, ptr->Address, ptr->Data, ptr->Length); | |
339 | break; | |
340 | } | |
341 | ptr++; | |
342 | } | |
343 | ret = dabusb_8051_reset (s, 0); | |
344 | ||
345 | dbg("dabusb_loadmem: exit"); | |
346 | ||
347 | return ret; | |
348 | } | |
349 | /* --------------------------------------------------------------------- */ | |
350 | static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b) | |
351 | { | |
352 | b->size = 4; | |
353 | b->data[0] = 0x2a; | |
354 | b->data[1] = 0; | |
355 | b->data[2] = 0; | |
356 | b->data[3] = 0; | |
357 | ||
358 | dbg("dabusb_fpga_clear"); | |
359 | ||
360 | return dabusb_bulk (s, b); | |
361 | } | |
362 | /* --------------------------------------------------------------------- */ | |
363 | static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b) | |
364 | { | |
365 | b->size = 4; | |
366 | b->data[0] = 0x2c; | |
367 | b->data[1] = 0; | |
368 | b->data[2] = 0; | |
369 | b->data[3] = 0; | |
370 | ||
371 | dbg("dabusb_fpga_init"); | |
372 | ||
373 | return dabusb_bulk (s, b); | |
374 | } | |
375 | /* --------------------------------------------------------------------- */ | |
376 | static int dabusb_fpga_download (pdabusb_t s, const char *fname) | |
377 | { | |
378 | pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL); | |
379 | unsigned int blen, n; | |
380 | int ret; | |
381 | unsigned char *buf = bitstream; | |
382 | ||
383 | dbg("Enter dabusb_fpga_download (internal)"); | |
384 | ||
385 | if (!b) { | |
386 | err("kmalloc(sizeof(bulk_transfer_t))==NULL"); | |
387 | return -ENOMEM; | |
388 | } | |
389 | ||
390 | b->pipe = 1; | |
391 | ret = dabusb_fpga_clear (s, b); | |
392 | mdelay (10); | |
393 | blen = buf[73] + (buf[72] << 8); | |
394 | ||
395 | dbg("Bitstream len: %i", blen); | |
396 | ||
397 | b->data[0] = 0x2b; | |
398 | b->data[1] = 0; | |
399 | b->data[2] = 0; | |
400 | b->data[3] = 60; | |
401 | ||
402 | for (n = 0; n <= blen + 60; n += 60) { | |
403 | // some cclks for startup | |
404 | b->size = 64; | |
405 | memcpy (b->data + 4, buf + 74 + n, 60); | |
406 | ret = dabusb_bulk (s, b); | |
407 | if (ret < 0) { | |
408 | err("dabusb_bulk failed."); | |
409 | break; | |
410 | } | |
411 | mdelay (1); | |
412 | } | |
413 | ||
414 | ret = dabusb_fpga_init (s, b); | |
415 | kfree (b); | |
416 | ||
417 | dbg("exit dabusb_fpga_download"); | |
418 | ||
419 | return ret; | |
420 | } | |
421 | ||
422 | static int dabusb_stop (pdabusb_t s) | |
423 | { | |
424 | dbg("dabusb_stop"); | |
425 | ||
426 | s->state = _stopped; | |
427 | dabusb_cancel_queue (s, &s->rec_buff_list); | |
428 | ||
429 | dbg("pending_io: %d", s->pending_io.counter); | |
430 | ||
431 | s->pending_io.counter = 0; | |
432 | return 0; | |
433 | } | |
434 | ||
435 | static int dabusb_startrek (pdabusb_t s) | |
436 | { | |
437 | if (!s->got_mem && s->state != _started) { | |
438 | ||
439 | dbg("dabusb_startrek"); | |
440 | ||
441 | if (dabusb_alloc_buffers (s) < 0) | |
442 | return -ENOMEM; | |
443 | dabusb_stop (s); | |
444 | s->state = _started; | |
445 | s->readptr = 0; | |
446 | } | |
447 | ||
448 | if (!list_empty (&s->free_buff_list)) { | |
449 | pbuff_t end; | |
450 | int ret; | |
d56410e0 | 451 | |
1da177e4 LT |
452 | while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) { |
453 | ||
454 | dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list); | |
455 | ||
456 | end = list_entry (s->rec_buff_list.prev, buff_t, buff_list); | |
457 | ||
458 | ret = usb_submit_urb (end->purb, GFP_KERNEL); | |
459 | if (ret) { | |
460 | err("usb_submit_urb returned:%d", ret); | |
461 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) | |
462 | err("startrek: dabusb_add_buf_tail failed"); | |
463 | break; | |
464 | } | |
465 | else | |
466 | atomic_inc (&s->pending_io); | |
467 | } | |
468 | dbg("pending_io: %d",s->pending_io.counter); | |
469 | } | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos) | |
475 | { | |
476 | pdabusb_t s = (pdabusb_t) file->private_data; | |
477 | unsigned long flags; | |
478 | unsigned ret = 0; | |
479 | int rem; | |
480 | int cnt; | |
481 | pbuff_t b; | |
482 | struct urb *purb = NULL; | |
483 | ||
484 | dbg("dabusb_read"); | |
485 | ||
486 | if (*ppos) | |
487 | return -ESPIPE; | |
488 | ||
489 | if (s->remove_pending) | |
490 | return -EIO; | |
491 | ||
492 | ||
493 | if (!s->usbdev) | |
494 | return -EIO; | |
495 | ||
496 | while (count > 0) { | |
497 | dabusb_startrek (s); | |
498 | ||
499 | spin_lock_irqsave (&s->lock, flags); | |
500 | ||
501 | if (list_empty (&s->rec_buff_list)) { | |
502 | ||
503 | spin_unlock_irqrestore(&s->lock, flags); | |
504 | ||
505 | err("error: rec_buf_list is empty"); | |
506 | goto err; | |
507 | } | |
d56410e0 | 508 | |
1da177e4 LT |
509 | b = list_entry (s->rec_buff_list.next, buff_t, buff_list); |
510 | purb = b->purb; | |
511 | ||
512 | spin_unlock_irqrestore(&s->lock, flags); | |
513 | ||
514 | if (purb->status == -EINPROGRESS) { | |
515 | if (file->f_flags & O_NONBLOCK) // return nonblocking | |
516 | { | |
517 | if (!ret) | |
518 | ret = -EAGAIN; | |
519 | goto err; | |
520 | } | |
521 | ||
522 | interruptible_sleep_on (&s->wait); | |
523 | ||
524 | if (signal_pending (current)) { | |
525 | if (!ret) | |
526 | ret = -ERESTARTSYS; | |
527 | goto err; | |
528 | } | |
529 | ||
530 | spin_lock_irqsave (&s->lock, flags); | |
531 | ||
532 | if (list_empty (&s->rec_buff_list)) { | |
533 | spin_unlock_irqrestore(&s->lock, flags); | |
534 | err("error: still no buffer available."); | |
535 | goto err; | |
536 | } | |
537 | spin_unlock_irqrestore(&s->lock, flags); | |
538 | s->readptr = 0; | |
539 | } | |
540 | if (s->remove_pending) { | |
541 | ret = -EIO; | |
542 | goto err; | |
543 | } | |
544 | ||
545 | rem = purb->actual_length - s->readptr; // set remaining bytes to copy | |
546 | ||
547 | if (count >= rem) | |
548 | cnt = rem; | |
549 | else | |
550 | cnt = count; | |
551 | ||
552 | dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt); | |
553 | ||
554 | if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) { | |
555 | err("read: copy_to_user failed"); | |
556 | if (!ret) | |
557 | ret = -EFAULT; | |
558 | goto err; | |
559 | } | |
560 | ||
561 | s->readptr += cnt; | |
562 | count -= cnt; | |
563 | buf += cnt; | |
564 | ret += cnt; | |
565 | ||
566 | if (s->readptr == purb->actual_length) { | |
567 | // finished, take next buffer | |
568 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) | |
569 | err("read: dabusb_add_buf_tail failed"); | |
570 | s->readptr = 0; | |
571 | } | |
572 | } | |
4186ecf8 | 573 | err: //mutex_unlock(&s->mutex); |
1da177e4 LT |
574 | return ret; |
575 | } | |
576 | ||
577 | static int dabusb_open (struct inode *inode, struct file *file) | |
578 | { | |
579 | int devnum = iminor(inode); | |
580 | pdabusb_t s; | |
581 | ||
582 | if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB)) | |
583 | return -EIO; | |
584 | ||
585 | s = &dabusb[devnum - DABUSB_MINOR]; | |
586 | ||
587 | dbg("dabusb_open"); | |
4186ecf8 | 588 | mutex_lock(&s->mutex); |
1da177e4 LT |
589 | |
590 | while (!s->usbdev || s->opened) { | |
4186ecf8 | 591 | mutex_unlock(&s->mutex); |
1da177e4 LT |
592 | |
593 | if (file->f_flags & O_NONBLOCK) { | |
594 | return -EBUSY; | |
595 | } | |
596 | msleep_interruptible(500); | |
597 | ||
598 | if (signal_pending (current)) { | |
599 | return -EAGAIN; | |
600 | } | |
4186ecf8 | 601 | mutex_lock(&s->mutex); |
1da177e4 LT |
602 | } |
603 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
4186ecf8 | 604 | mutex_unlock(&s->mutex); |
1da177e4 LT |
605 | err("set_interface failed"); |
606 | return -EINVAL; | |
607 | } | |
608 | s->opened = 1; | |
4186ecf8 | 609 | mutex_unlock(&s->mutex); |
1da177e4 LT |
610 | |
611 | file->f_pos = 0; | |
612 | file->private_data = s; | |
613 | ||
614 | return nonseekable_open(inode, file); | |
615 | } | |
616 | ||
617 | static int dabusb_release (struct inode *inode, struct file *file) | |
618 | { | |
619 | pdabusb_t s = (pdabusb_t) file->private_data; | |
620 | ||
621 | dbg("dabusb_release"); | |
622 | ||
4186ecf8 | 623 | mutex_lock(&s->mutex); |
1da177e4 LT |
624 | dabusb_stop (s); |
625 | dabusb_free_buffers (s); | |
4186ecf8 | 626 | mutex_unlock(&s->mutex); |
1da177e4 LT |
627 | |
628 | if (!s->remove_pending) { | |
629 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) | |
630 | err("set_interface failed"); | |
631 | } | |
632 | else | |
633 | wake_up (&s->remove_ok); | |
634 | ||
635 | s->opened = 0; | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
640 | { | |
641 | pdabusb_t s = (pdabusb_t) file->private_data; | |
642 | pbulk_transfer_t pbulk; | |
643 | int ret = 0; | |
644 | int version = DABUSB_VERSION; | |
645 | ||
646 | dbg("dabusb_ioctl"); | |
647 | ||
648 | if (s->remove_pending) | |
649 | return -EIO; | |
650 | ||
4186ecf8 | 651 | mutex_lock(&s->mutex); |
1da177e4 LT |
652 | |
653 | if (!s->usbdev) { | |
4186ecf8 | 654 | mutex_unlock(&s->mutex); |
1da177e4 LT |
655 | return -EIO; |
656 | } | |
657 | ||
658 | switch (cmd) { | |
659 | ||
660 | case IOCTL_DAB_BULK: | |
5cbded58 | 661 | pbulk = kmalloc(sizeof (bulk_transfer_t), GFP_KERNEL); |
1da177e4 LT |
662 | |
663 | if (!pbulk) { | |
664 | ret = -ENOMEM; | |
665 | break; | |
666 | } | |
667 | ||
668 | if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) { | |
669 | ret = -EFAULT; | |
670 | kfree (pbulk); | |
671 | break; | |
672 | } | |
673 | ||
674 | ret=dabusb_bulk (s, pbulk); | |
675 | if(ret==0) | |
676 | if (copy_to_user((void __user *)arg, pbulk, | |
677 | sizeof(bulk_transfer_t))) | |
678 | ret = -EFAULT; | |
679 | kfree (pbulk); | |
680 | break; | |
681 | ||
682 | case IOCTL_DAB_OVERRUNS: | |
683 | ret = put_user (s->overruns, (unsigned int __user *) arg); | |
684 | break; | |
685 | ||
686 | case IOCTL_DAB_VERSION: | |
687 | ret = put_user (version, (unsigned int __user *) arg); | |
688 | break; | |
689 | ||
690 | default: | |
691 | ret = -ENOIOCTLCMD; | |
692 | break; | |
693 | } | |
4186ecf8 | 694 | mutex_unlock(&s->mutex); |
1da177e4 LT |
695 | return ret; |
696 | } | |
697 | ||
fa027c2a | 698 | static const struct file_operations dabusb_fops = |
1da177e4 LT |
699 | { |
700 | .owner = THIS_MODULE, | |
701 | .llseek = no_llseek, | |
702 | .read = dabusb_read, | |
703 | .ioctl = dabusb_ioctl, | |
704 | .open = dabusb_open, | |
705 | .release = dabusb_release, | |
706 | }; | |
707 | ||
708 | static struct usb_class_driver dabusb_class = { | |
d6e5bcf4 | 709 | .name = "dabusb%d", |
1da177e4 | 710 | .fops = &dabusb_fops, |
1da177e4 LT |
711 | .minor_base = DABUSB_MINOR, |
712 | }; | |
713 | ||
714 | ||
715 | /* --------------------------------------------------------------------- */ | |
716 | static int dabusb_probe (struct usb_interface *intf, | |
717 | const struct usb_device_id *id) | |
718 | { | |
719 | struct usb_device *usbdev = interface_to_usbdev(intf); | |
720 | int retval; | |
721 | pdabusb_t s; | |
722 | ||
723 | dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d", | |
724 | le16_to_cpu(usbdev->descriptor.idVendor), | |
725 | le16_to_cpu(usbdev->descriptor.idProduct), | |
726 | intf->altsetting->desc.bInterfaceNumber); | |
727 | ||
728 | /* We don't handle multiple configurations */ | |
729 | if (usbdev->descriptor.bNumConfigurations != 1) | |
730 | return -ENODEV; | |
731 | ||
732 | if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF && | |
733 | le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999) | |
734 | return -ENODEV; | |
735 | ||
736 | ||
737 | ||
738 | s = &dabusb[intf->minor]; | |
739 | ||
4186ecf8 | 740 | mutex_lock(&s->mutex); |
1da177e4 LT |
741 | s->remove_pending = 0; |
742 | s->usbdev = usbdev; | |
743 | s->devnum = intf->minor; | |
744 | ||
745 | if (usb_reset_configuration (usbdev) < 0) { | |
746 | err("reset_configuration failed"); | |
747 | goto reject; | |
748 | } | |
749 | if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) { | |
750 | dabusb_loadmem (s, NULL); | |
751 | goto reject; | |
752 | } | |
753 | else { | |
754 | dabusb_fpga_download (s, NULL); | |
755 | ||
756 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) { | |
757 | err("set_interface failed"); | |
758 | goto reject; | |
759 | } | |
760 | } | |
761 | dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber); | |
762 | usb_set_intfdata (intf, s); | |
4186ecf8 | 763 | mutex_unlock(&s->mutex); |
1da177e4 LT |
764 | |
765 | retval = usb_register_dev(intf, &dabusb_class); | |
766 | if (retval) { | |
767 | usb_set_intfdata (intf, NULL); | |
768 | return -ENOMEM; | |
769 | } | |
770 | ||
771 | return 0; | |
772 | ||
773 | reject: | |
4186ecf8 | 774 | mutex_unlock(&s->mutex); |
1da177e4 LT |
775 | s->usbdev = NULL; |
776 | return -ENODEV; | |
777 | } | |
778 | ||
779 | static void dabusb_disconnect (struct usb_interface *intf) | |
780 | { | |
781 | wait_queue_t __wait; | |
782 | pdabusb_t s = usb_get_intfdata (intf); | |
783 | ||
784 | dbg("dabusb_disconnect"); | |
d56410e0 | 785 | |
1da177e4 | 786 | init_waitqueue_entry(&__wait, current); |
d56410e0 | 787 | |
1da177e4 LT |
788 | usb_set_intfdata (intf, NULL); |
789 | if (s) { | |
790 | usb_deregister_dev (intf, &dabusb_class); | |
791 | s->remove_pending = 1; | |
792 | wake_up (&s->wait); | |
793 | add_wait_queue(&s->remove_ok, &__wait); | |
794 | set_current_state(TASK_UNINTERRUPTIBLE); | |
795 | if (s->state == _started) | |
796 | schedule(); | |
797 | current->state = TASK_RUNNING; | |
798 | remove_wait_queue(&s->remove_ok, &__wait); | |
d56410e0 | 799 | |
1da177e4 LT |
800 | s->usbdev = NULL; |
801 | s->overruns = 0; | |
802 | } | |
803 | } | |
804 | ||
805 | static struct usb_device_id dabusb_ids [] = { | |
806 | // { USB_DEVICE(0x0547, 0x2131) }, /* An2131 chip, no boot ROM */ | |
807 | { USB_DEVICE(0x0547, 0x9999) }, | |
808 | { } /* Terminating entry */ | |
809 | }; | |
810 | ||
811 | MODULE_DEVICE_TABLE (usb, dabusb_ids); | |
812 | ||
813 | static struct usb_driver dabusb_driver = { | |
1da177e4 LT |
814 | .name = "dabusb", |
815 | .probe = dabusb_probe, | |
816 | .disconnect = dabusb_disconnect, | |
817 | .id_table = dabusb_ids, | |
818 | }; | |
819 | ||
820 | /* --------------------------------------------------------------------- */ | |
821 | ||
822 | static int __init dabusb_init (void) | |
823 | { | |
824 | int retval; | |
825 | unsigned u; | |
826 | ||
827 | /* initialize struct */ | |
828 | for (u = 0; u < NRDABUSB; u++) { | |
829 | pdabusb_t s = &dabusb[u]; | |
830 | memset (s, 0, sizeof (dabusb_t)); | |
4186ecf8 | 831 | mutex_init (&s->mutex); |
1da177e4 LT |
832 | s->usbdev = NULL; |
833 | s->total_buffer_size = buffers; | |
834 | init_waitqueue_head (&s->wait); | |
835 | init_waitqueue_head (&s->remove_ok); | |
836 | spin_lock_init (&s->lock); | |
837 | INIT_LIST_HEAD (&s->free_buff_list); | |
838 | INIT_LIST_HEAD (&s->rec_buff_list); | |
839 | } | |
840 | ||
841 | /* register misc device */ | |
842 | retval = usb_register(&dabusb_driver); | |
843 | if (retval) | |
844 | goto out; | |
845 | ||
846 | dbg("dabusb_init: driver registered"); | |
847 | ||
848 | info(DRIVER_VERSION ":" DRIVER_DESC); | |
849 | ||
850 | out: | |
851 | return retval; | |
852 | } | |
853 | ||
854 | static void __exit dabusb_cleanup (void) | |
855 | { | |
856 | dbg("dabusb_cleanup"); | |
857 | ||
858 | usb_deregister (&dabusb_driver); | |
859 | } | |
860 | ||
861 | /* --------------------------------------------------------------------- */ | |
862 | ||
863 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
864 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
865 | MODULE_LICENSE("GPL"); | |
866 | ||
867 | module_param(buffers, int, 0); | |
868 | MODULE_PARM_DESC (buffers, "Number of buffers (default=256)"); | |
869 | ||
870 | module_init (dabusb_init); | |
871 | module_exit (dabusb_cleanup); | |
872 | ||
873 | /* --------------------------------------------------------------------- */ |