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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> | |
40 | #include <linux/smp_lock.h> | |
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 | /*-------------------------------------------------------------------*/ | |
88 | #ifdef DEBUG | |
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 | ||
138 | #ifdef DEBUG | |
139 | dump_urb(b->purb); | |
140 | #endif | |
141 | if (b->purb->transfer_buffer) | |
142 | kfree (b->purb->transfer_buffer); | |
143 | usb_free_urb(b->purb); | |
144 | tmp = p->next; | |
145 | list_del (p); | |
146 | kfree (b); | |
147 | p = tmp; | |
148 | } | |
149 | ||
150 | return 0; | |
151 | } | |
152 | /*-------------------------------------------------------------------*/ | |
153 | static int dabusb_free_buffers (pdabusb_t s) | |
154 | { | |
155 | unsigned long flags; | |
156 | dbg("dabusb_free_buffers"); | |
157 | ||
158 | spin_lock_irqsave(&s->lock, flags); | |
159 | ||
160 | dabusb_free_queue (&s->free_buff_list); | |
161 | dabusb_free_queue (&s->rec_buff_list); | |
162 | ||
163 | spin_unlock_irqrestore(&s->lock, flags); | |
164 | ||
165 | s->got_mem = 0; | |
166 | return 0; | |
167 | } | |
168 | /*-------------------------------------------------------------------*/ | |
169 | static void dabusb_iso_complete (struct urb *purb, struct pt_regs *regs) | |
170 | { | |
171 | pbuff_t b = purb->context; | |
172 | pdabusb_t s = b->s; | |
173 | int i; | |
174 | int len; | |
175 | int dst = 0; | |
176 | void *buf = purb->transfer_buffer; | |
177 | ||
178 | dbg("dabusb_iso_complete"); | |
179 | ||
180 | // process if URB was not killed | |
181 | if (purb->status != -ENOENT) { | |
182 | unsigned int pipe = usb_rcvisocpipe (purb->dev, _DABUSB_ISOPIPE); | |
183 | int pipesize = usb_maxpacket (purb->dev, pipe, usb_pipeout (pipe)); | |
184 | for (i = 0; i < purb->number_of_packets; i++) | |
185 | if (!purb->iso_frame_desc[i].status) { | |
186 | len = purb->iso_frame_desc[i].actual_length; | |
187 | if (len <= pipesize) { | |
188 | memcpy (buf + dst, buf + purb->iso_frame_desc[i].offset, len); | |
189 | dst += len; | |
190 | } | |
191 | else | |
192 | err("dabusb_iso_complete: invalid len %d", len); | |
193 | } | |
194 | else | |
195 | warn("dabusb_iso_complete: corrupted packet status: %d", purb->iso_frame_desc[i].status); | |
196 | if (dst != purb->actual_length) | |
197 | err("dst!=purb->actual_length:%d!=%d", dst, purb->actual_length); | |
198 | } | |
199 | ||
200 | if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) { | |
201 | s->overruns++; | |
202 | err("overrun (%d)", s->overruns); | |
203 | } | |
204 | wake_up (&s->wait); | |
205 | } | |
206 | /*-------------------------------------------------------------------*/ | |
207 | static int dabusb_alloc_buffers (pdabusb_t s) | |
208 | { | |
209 | int buffers = 0; | |
210 | pbuff_t b; | |
211 | unsigned int pipe = usb_rcvisocpipe (s->usbdev, _DABUSB_ISOPIPE); | |
212 | int pipesize = usb_maxpacket (s->usbdev, pipe, usb_pipeout (pipe)); | |
213 | int packets = _ISOPIPESIZE / pipesize; | |
214 | int transfer_buffer_length = packets * pipesize; | |
215 | int i; | |
216 | ||
217 | dbg("dabusb_alloc_buffers pipesize:%d packets:%d transfer_buffer_len:%d", | |
218 | pipesize, packets, transfer_buffer_length); | |
219 | ||
220 | while (buffers < (s->total_buffer_size << 10)) { | |
221 | b = (pbuff_t) kmalloc (sizeof (buff_t), GFP_KERNEL); | |
222 | if (!b) { | |
223 | err("kmalloc(sizeof(buff_t))==NULL"); | |
224 | goto err; | |
225 | } | |
226 | memset (b, 0, sizeof (buff_t)); | |
227 | b->s = s; | |
228 | b->purb = usb_alloc_urb(packets, GFP_KERNEL); | |
229 | if (!b->purb) { | |
230 | err("usb_alloc_urb == NULL"); | |
231 | kfree (b); | |
232 | goto err; | |
233 | } | |
234 | ||
235 | b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL); | |
236 | if (!b->purb->transfer_buffer) { | |
237 | kfree (b->purb); | |
238 | kfree (b); | |
239 | err("kmalloc(%d)==NULL", transfer_buffer_length); | |
240 | goto err; | |
241 | } | |
242 | ||
243 | b->purb->transfer_buffer_length = transfer_buffer_length; | |
244 | b->purb->number_of_packets = packets; | |
245 | b->purb->complete = dabusb_iso_complete; | |
246 | b->purb->context = b; | |
247 | b->purb->dev = s->usbdev; | |
248 | b->purb->pipe = pipe; | |
249 | b->purb->transfer_flags = URB_ISO_ASAP; | |
250 | ||
251 | for (i = 0; i < packets; i++) { | |
252 | b->purb->iso_frame_desc[i].offset = i * pipesize; | |
253 | b->purb->iso_frame_desc[i].length = pipesize; | |
254 | } | |
255 | ||
256 | buffers += transfer_buffer_length; | |
257 | list_add_tail (&b->buff_list, &s->free_buff_list); | |
258 | } | |
259 | s->got_mem = buffers; | |
260 | ||
261 | return 0; | |
262 | ||
263 | err: | |
264 | dabusb_free_buffers (s); | |
265 | return -ENOMEM; | |
266 | } | |
267 | /*-------------------------------------------------------------------*/ | |
268 | static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb) | |
269 | { | |
270 | int ret; | |
271 | unsigned int pipe; | |
272 | int actual_length; | |
273 | ||
274 | dbg("dabusb_bulk"); | |
275 | ||
276 | if (!pb->pipe) | |
277 | pipe = usb_rcvbulkpipe (s->usbdev, 2); | |
278 | else | |
279 | pipe = usb_sndbulkpipe (s->usbdev, 2); | |
280 | ||
281 | ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100); | |
282 | if(ret<0) { | |
283 | err("dabusb: usb_bulk_msg failed(%d)",ret); | |
284 | ||
285 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
286 | err("set_interface failed"); | |
287 | return -EINVAL; | |
288 | } | |
289 | ||
290 | } | |
291 | ||
292 | if( ret == -EPIPE ) { | |
293 | warn("CLEAR_FEATURE request to remove STALL condition."); | |
294 | if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe))) | |
295 | err("request failed"); | |
296 | } | |
297 | ||
298 | pb->size = actual_length; | |
299 | return ret; | |
300 | } | |
301 | /* --------------------------------------------------------------------- */ | |
302 | static int dabusb_writemem (pdabusb_t s, int pos, unsigned char *data, int len) | |
303 | { | |
304 | int ret; | |
305 | unsigned char *transfer_buffer = kmalloc (len, GFP_KERNEL); | |
306 | ||
307 | if (!transfer_buffer) { | |
308 | err("dabusb_writemem: kmalloc(%d) failed.", len); | |
309 | return -ENOMEM; | |
310 | } | |
311 | ||
312 | memcpy (transfer_buffer, data, len); | |
313 | ||
314 | ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300); | |
315 | ||
316 | kfree (transfer_buffer); | |
317 | return ret; | |
318 | } | |
319 | /* --------------------------------------------------------------------- */ | |
320 | static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit) | |
321 | { | |
322 | dbg("dabusb_8051_reset: %d",reset_bit); | |
323 | return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1); | |
324 | } | |
325 | /* --------------------------------------------------------------------- */ | |
326 | static int dabusb_loadmem (pdabusb_t s, const char *fname) | |
327 | { | |
328 | int ret; | |
329 | PINTEL_HEX_RECORD ptr = firmware; | |
330 | ||
331 | dbg("Enter dabusb_loadmem (internal)"); | |
332 | ||
333 | ret = dabusb_8051_reset (s, 1); | |
334 | while (ptr->Type == 0) { | |
335 | ||
336 | dbg("dabusb_writemem: %04X %p %d)", ptr->Address, ptr->Data, ptr->Length); | |
337 | ||
338 | ret = dabusb_writemem (s, ptr->Address, ptr->Data, ptr->Length); | |
339 | if (ret < 0) { | |
340 | err("dabusb_writemem failed (%d %04X %p %d)", ret, ptr->Address, ptr->Data, ptr->Length); | |
341 | break; | |
342 | } | |
343 | ptr++; | |
344 | } | |
345 | ret = dabusb_8051_reset (s, 0); | |
346 | ||
347 | dbg("dabusb_loadmem: exit"); | |
348 | ||
349 | return ret; | |
350 | } | |
351 | /* --------------------------------------------------------------------- */ | |
352 | static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b) | |
353 | { | |
354 | b->size = 4; | |
355 | b->data[0] = 0x2a; | |
356 | b->data[1] = 0; | |
357 | b->data[2] = 0; | |
358 | b->data[3] = 0; | |
359 | ||
360 | dbg("dabusb_fpga_clear"); | |
361 | ||
362 | return dabusb_bulk (s, b); | |
363 | } | |
364 | /* --------------------------------------------------------------------- */ | |
365 | static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b) | |
366 | { | |
367 | b->size = 4; | |
368 | b->data[0] = 0x2c; | |
369 | b->data[1] = 0; | |
370 | b->data[2] = 0; | |
371 | b->data[3] = 0; | |
372 | ||
373 | dbg("dabusb_fpga_init"); | |
374 | ||
375 | return dabusb_bulk (s, b); | |
376 | } | |
377 | /* --------------------------------------------------------------------- */ | |
378 | static int dabusb_fpga_download (pdabusb_t s, const char *fname) | |
379 | { | |
380 | pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL); | |
381 | unsigned int blen, n; | |
382 | int ret; | |
383 | unsigned char *buf = bitstream; | |
384 | ||
385 | dbg("Enter dabusb_fpga_download (internal)"); | |
386 | ||
387 | if (!b) { | |
388 | err("kmalloc(sizeof(bulk_transfer_t))==NULL"); | |
389 | return -ENOMEM; | |
390 | } | |
391 | ||
392 | b->pipe = 1; | |
393 | ret = dabusb_fpga_clear (s, b); | |
394 | mdelay (10); | |
395 | blen = buf[73] + (buf[72] << 8); | |
396 | ||
397 | dbg("Bitstream len: %i", blen); | |
398 | ||
399 | b->data[0] = 0x2b; | |
400 | b->data[1] = 0; | |
401 | b->data[2] = 0; | |
402 | b->data[3] = 60; | |
403 | ||
404 | for (n = 0; n <= blen + 60; n += 60) { | |
405 | // some cclks for startup | |
406 | b->size = 64; | |
407 | memcpy (b->data + 4, buf + 74 + n, 60); | |
408 | ret = dabusb_bulk (s, b); | |
409 | if (ret < 0) { | |
410 | err("dabusb_bulk failed."); | |
411 | break; | |
412 | } | |
413 | mdelay (1); | |
414 | } | |
415 | ||
416 | ret = dabusb_fpga_init (s, b); | |
417 | kfree (b); | |
418 | ||
419 | dbg("exit dabusb_fpga_download"); | |
420 | ||
421 | return ret; | |
422 | } | |
423 | ||
424 | static int dabusb_stop (pdabusb_t s) | |
425 | { | |
426 | dbg("dabusb_stop"); | |
427 | ||
428 | s->state = _stopped; | |
429 | dabusb_cancel_queue (s, &s->rec_buff_list); | |
430 | ||
431 | dbg("pending_io: %d", s->pending_io.counter); | |
432 | ||
433 | s->pending_io.counter = 0; | |
434 | return 0; | |
435 | } | |
436 | ||
437 | static int dabusb_startrek (pdabusb_t s) | |
438 | { | |
439 | if (!s->got_mem && s->state != _started) { | |
440 | ||
441 | dbg("dabusb_startrek"); | |
442 | ||
443 | if (dabusb_alloc_buffers (s) < 0) | |
444 | return -ENOMEM; | |
445 | dabusb_stop (s); | |
446 | s->state = _started; | |
447 | s->readptr = 0; | |
448 | } | |
449 | ||
450 | if (!list_empty (&s->free_buff_list)) { | |
451 | pbuff_t end; | |
452 | int ret; | |
453 | ||
454 | while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) { | |
455 | ||
456 | dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list); | |
457 | ||
458 | end = list_entry (s->rec_buff_list.prev, buff_t, buff_list); | |
459 | ||
460 | ret = usb_submit_urb (end->purb, GFP_KERNEL); | |
461 | if (ret) { | |
462 | err("usb_submit_urb returned:%d", ret); | |
463 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) | |
464 | err("startrek: dabusb_add_buf_tail failed"); | |
465 | break; | |
466 | } | |
467 | else | |
468 | atomic_inc (&s->pending_io); | |
469 | } | |
470 | dbg("pending_io: %d",s->pending_io.counter); | |
471 | } | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos) | |
477 | { | |
478 | pdabusb_t s = (pdabusb_t) file->private_data; | |
479 | unsigned long flags; | |
480 | unsigned ret = 0; | |
481 | int rem; | |
482 | int cnt; | |
483 | pbuff_t b; | |
484 | struct urb *purb = NULL; | |
485 | ||
486 | dbg("dabusb_read"); | |
487 | ||
488 | if (*ppos) | |
489 | return -ESPIPE; | |
490 | ||
491 | if (s->remove_pending) | |
492 | return -EIO; | |
493 | ||
494 | ||
495 | if (!s->usbdev) | |
496 | return -EIO; | |
497 | ||
498 | while (count > 0) { | |
499 | dabusb_startrek (s); | |
500 | ||
501 | spin_lock_irqsave (&s->lock, flags); | |
502 | ||
503 | if (list_empty (&s->rec_buff_list)) { | |
504 | ||
505 | spin_unlock_irqrestore(&s->lock, flags); | |
506 | ||
507 | err("error: rec_buf_list is empty"); | |
508 | goto err; | |
509 | } | |
510 | ||
511 | b = list_entry (s->rec_buff_list.next, buff_t, buff_list); | |
512 | purb = b->purb; | |
513 | ||
514 | spin_unlock_irqrestore(&s->lock, flags); | |
515 | ||
516 | if (purb->status == -EINPROGRESS) { | |
517 | if (file->f_flags & O_NONBLOCK) // return nonblocking | |
518 | { | |
519 | if (!ret) | |
520 | ret = -EAGAIN; | |
521 | goto err; | |
522 | } | |
523 | ||
524 | interruptible_sleep_on (&s->wait); | |
525 | ||
526 | if (signal_pending (current)) { | |
527 | if (!ret) | |
528 | ret = -ERESTARTSYS; | |
529 | goto err; | |
530 | } | |
531 | ||
532 | spin_lock_irqsave (&s->lock, flags); | |
533 | ||
534 | if (list_empty (&s->rec_buff_list)) { | |
535 | spin_unlock_irqrestore(&s->lock, flags); | |
536 | err("error: still no buffer available."); | |
537 | goto err; | |
538 | } | |
539 | spin_unlock_irqrestore(&s->lock, flags); | |
540 | s->readptr = 0; | |
541 | } | |
542 | if (s->remove_pending) { | |
543 | ret = -EIO; | |
544 | goto err; | |
545 | } | |
546 | ||
547 | rem = purb->actual_length - s->readptr; // set remaining bytes to copy | |
548 | ||
549 | if (count >= rem) | |
550 | cnt = rem; | |
551 | else | |
552 | cnt = count; | |
553 | ||
554 | dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt); | |
555 | ||
556 | if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) { | |
557 | err("read: copy_to_user failed"); | |
558 | if (!ret) | |
559 | ret = -EFAULT; | |
560 | goto err; | |
561 | } | |
562 | ||
563 | s->readptr += cnt; | |
564 | count -= cnt; | |
565 | buf += cnt; | |
566 | ret += cnt; | |
567 | ||
568 | if (s->readptr == purb->actual_length) { | |
569 | // finished, take next buffer | |
570 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) | |
571 | err("read: dabusb_add_buf_tail failed"); | |
572 | s->readptr = 0; | |
573 | } | |
574 | } | |
575 | err: //up(&s->mutex); | |
576 | return ret; | |
577 | } | |
578 | ||
579 | static int dabusb_open (struct inode *inode, struct file *file) | |
580 | { | |
581 | int devnum = iminor(inode); | |
582 | pdabusb_t s; | |
583 | ||
584 | if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB)) | |
585 | return -EIO; | |
586 | ||
587 | s = &dabusb[devnum - DABUSB_MINOR]; | |
588 | ||
589 | dbg("dabusb_open"); | |
590 | down (&s->mutex); | |
591 | ||
592 | while (!s->usbdev || s->opened) { | |
593 | up (&s->mutex); | |
594 | ||
595 | if (file->f_flags & O_NONBLOCK) { | |
596 | return -EBUSY; | |
597 | } | |
598 | msleep_interruptible(500); | |
599 | ||
600 | if (signal_pending (current)) { | |
601 | return -EAGAIN; | |
602 | } | |
603 | down (&s->mutex); | |
604 | } | |
605 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
606 | up(&s->mutex); | |
607 | err("set_interface failed"); | |
608 | return -EINVAL; | |
609 | } | |
610 | s->opened = 1; | |
611 | up (&s->mutex); | |
612 | ||
613 | file->f_pos = 0; | |
614 | file->private_data = s; | |
615 | ||
616 | return nonseekable_open(inode, file); | |
617 | } | |
618 | ||
619 | static int dabusb_release (struct inode *inode, struct file *file) | |
620 | { | |
621 | pdabusb_t s = (pdabusb_t) file->private_data; | |
622 | ||
623 | dbg("dabusb_release"); | |
624 | ||
625 | down (&s->mutex); | |
626 | dabusb_stop (s); | |
627 | dabusb_free_buffers (s); | |
628 | up (&s->mutex); | |
629 | ||
630 | if (!s->remove_pending) { | |
631 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) | |
632 | err("set_interface failed"); | |
633 | } | |
634 | else | |
635 | wake_up (&s->remove_ok); | |
636 | ||
637 | s->opened = 0; | |
638 | return 0; | |
639 | } | |
640 | ||
641 | static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
642 | { | |
643 | pdabusb_t s = (pdabusb_t) file->private_data; | |
644 | pbulk_transfer_t pbulk; | |
645 | int ret = 0; | |
646 | int version = DABUSB_VERSION; | |
647 | ||
648 | dbg("dabusb_ioctl"); | |
649 | ||
650 | if (s->remove_pending) | |
651 | return -EIO; | |
652 | ||
653 | down (&s->mutex); | |
654 | ||
655 | if (!s->usbdev) { | |
656 | up (&s->mutex); | |
657 | return -EIO; | |
658 | } | |
659 | ||
660 | switch (cmd) { | |
661 | ||
662 | case IOCTL_DAB_BULK: | |
663 | pbulk = (pbulk_transfer_t) kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL); | |
664 | ||
665 | if (!pbulk) { | |
666 | ret = -ENOMEM; | |
667 | break; | |
668 | } | |
669 | ||
670 | if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) { | |
671 | ret = -EFAULT; | |
672 | kfree (pbulk); | |
673 | break; | |
674 | } | |
675 | ||
676 | ret=dabusb_bulk (s, pbulk); | |
677 | if(ret==0) | |
678 | if (copy_to_user((void __user *)arg, pbulk, | |
679 | sizeof(bulk_transfer_t))) | |
680 | ret = -EFAULT; | |
681 | kfree (pbulk); | |
682 | break; | |
683 | ||
684 | case IOCTL_DAB_OVERRUNS: | |
685 | ret = put_user (s->overruns, (unsigned int __user *) arg); | |
686 | break; | |
687 | ||
688 | case IOCTL_DAB_VERSION: | |
689 | ret = put_user (version, (unsigned int __user *) arg); | |
690 | break; | |
691 | ||
692 | default: | |
693 | ret = -ENOIOCTLCMD; | |
694 | break; | |
695 | } | |
696 | up (&s->mutex); | |
697 | return ret; | |
698 | } | |
699 | ||
700 | static struct file_operations dabusb_fops = | |
701 | { | |
702 | .owner = THIS_MODULE, | |
703 | .llseek = no_llseek, | |
704 | .read = dabusb_read, | |
705 | .ioctl = dabusb_ioctl, | |
706 | .open = dabusb_open, | |
707 | .release = dabusb_release, | |
708 | }; | |
709 | ||
710 | static struct usb_class_driver dabusb_class = { | |
711 | .name = "usb/dabusb%d", | |
712 | .fops = &dabusb_fops, | |
713 | .mode = S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
714 | .minor_base = DABUSB_MINOR, | |
715 | }; | |
716 | ||
717 | ||
718 | /* --------------------------------------------------------------------- */ | |
719 | static int dabusb_probe (struct usb_interface *intf, | |
720 | const struct usb_device_id *id) | |
721 | { | |
722 | struct usb_device *usbdev = interface_to_usbdev(intf); | |
723 | int retval; | |
724 | pdabusb_t s; | |
725 | ||
726 | dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d", | |
727 | le16_to_cpu(usbdev->descriptor.idVendor), | |
728 | le16_to_cpu(usbdev->descriptor.idProduct), | |
729 | intf->altsetting->desc.bInterfaceNumber); | |
730 | ||
731 | /* We don't handle multiple configurations */ | |
732 | if (usbdev->descriptor.bNumConfigurations != 1) | |
733 | return -ENODEV; | |
734 | ||
735 | if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF && | |
736 | le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999) | |
737 | return -ENODEV; | |
738 | ||
739 | ||
740 | ||
741 | s = &dabusb[intf->minor]; | |
742 | ||
743 | down (&s->mutex); | |
744 | s->remove_pending = 0; | |
745 | s->usbdev = usbdev; | |
746 | s->devnum = intf->minor; | |
747 | ||
748 | if (usb_reset_configuration (usbdev) < 0) { | |
749 | err("reset_configuration failed"); | |
750 | goto reject; | |
751 | } | |
752 | if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) { | |
753 | dabusb_loadmem (s, NULL); | |
754 | goto reject; | |
755 | } | |
756 | else { | |
757 | dabusb_fpga_download (s, NULL); | |
758 | ||
759 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) { | |
760 | err("set_interface failed"); | |
761 | goto reject; | |
762 | } | |
763 | } | |
764 | dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber); | |
765 | usb_set_intfdata (intf, s); | |
766 | up (&s->mutex); | |
767 | ||
768 | retval = usb_register_dev(intf, &dabusb_class); | |
769 | if (retval) { | |
770 | usb_set_intfdata (intf, NULL); | |
771 | return -ENOMEM; | |
772 | } | |
773 | ||
774 | return 0; | |
775 | ||
776 | reject: | |
777 | up (&s->mutex); | |
778 | s->usbdev = NULL; | |
779 | return -ENODEV; | |
780 | } | |
781 | ||
782 | static void dabusb_disconnect (struct usb_interface *intf) | |
783 | { | |
784 | wait_queue_t __wait; | |
785 | pdabusb_t s = usb_get_intfdata (intf); | |
786 | ||
787 | dbg("dabusb_disconnect"); | |
788 | ||
789 | init_waitqueue_entry(&__wait, current); | |
790 | ||
791 | usb_set_intfdata (intf, NULL); | |
792 | if (s) { | |
793 | usb_deregister_dev (intf, &dabusb_class); | |
794 | s->remove_pending = 1; | |
795 | wake_up (&s->wait); | |
796 | add_wait_queue(&s->remove_ok, &__wait); | |
797 | set_current_state(TASK_UNINTERRUPTIBLE); | |
798 | if (s->state == _started) | |
799 | schedule(); | |
800 | current->state = TASK_RUNNING; | |
801 | remove_wait_queue(&s->remove_ok, &__wait); | |
802 | ||
803 | s->usbdev = NULL; | |
804 | s->overruns = 0; | |
805 | } | |
806 | } | |
807 | ||
808 | static struct usb_device_id dabusb_ids [] = { | |
809 | // { USB_DEVICE(0x0547, 0x2131) }, /* An2131 chip, no boot ROM */ | |
810 | { USB_DEVICE(0x0547, 0x9999) }, | |
811 | { } /* Terminating entry */ | |
812 | }; | |
813 | ||
814 | MODULE_DEVICE_TABLE (usb, dabusb_ids); | |
815 | ||
816 | static struct usb_driver dabusb_driver = { | |
817 | .owner = THIS_MODULE, | |
818 | .name = "dabusb", | |
819 | .probe = dabusb_probe, | |
820 | .disconnect = dabusb_disconnect, | |
821 | .id_table = dabusb_ids, | |
822 | }; | |
823 | ||
824 | /* --------------------------------------------------------------------- */ | |
825 | ||
826 | static int __init dabusb_init (void) | |
827 | { | |
828 | int retval; | |
829 | unsigned u; | |
830 | ||
831 | /* initialize struct */ | |
832 | for (u = 0; u < NRDABUSB; u++) { | |
833 | pdabusb_t s = &dabusb[u]; | |
834 | memset (s, 0, sizeof (dabusb_t)); | |
835 | init_MUTEX (&s->mutex); | |
836 | s->usbdev = NULL; | |
837 | s->total_buffer_size = buffers; | |
838 | init_waitqueue_head (&s->wait); | |
839 | init_waitqueue_head (&s->remove_ok); | |
840 | spin_lock_init (&s->lock); | |
841 | INIT_LIST_HEAD (&s->free_buff_list); | |
842 | INIT_LIST_HEAD (&s->rec_buff_list); | |
843 | } | |
844 | ||
845 | /* register misc device */ | |
846 | retval = usb_register(&dabusb_driver); | |
847 | if (retval) | |
848 | goto out; | |
849 | ||
850 | dbg("dabusb_init: driver registered"); | |
851 | ||
852 | info(DRIVER_VERSION ":" DRIVER_DESC); | |
853 | ||
854 | out: | |
855 | return retval; | |
856 | } | |
857 | ||
858 | static void __exit dabusb_cleanup (void) | |
859 | { | |
860 | dbg("dabusb_cleanup"); | |
861 | ||
862 | usb_deregister (&dabusb_driver); | |
863 | } | |
864 | ||
865 | /* --------------------------------------------------------------------- */ | |
866 | ||
867 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
868 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
869 | MODULE_LICENSE("GPL"); | |
870 | ||
871 | module_param(buffers, int, 0); | |
872 | MODULE_PARM_DESC (buffers, "Number of buffers (default=256)"); | |
873 | ||
874 | module_init (dabusb_init); | |
875 | module_exit (dabusb_cleanup); | |
876 | ||
877 | /* --------------------------------------------------------------------- */ |