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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> | |
4186ecf8 | 40 | #include <linux/mutex.h> |
c4667746 DW |
41 | #include <linux/firmware.h> |
42 | #include <linux/ihex.h> | |
1da177e4 LT |
43 | |
44 | #include "dabusb.h" | |
1da177e4 LT |
45 | |
46 | /* | |
47 | * Version Information | |
48 | */ | |
49 | #define DRIVER_VERSION "v1.54" | |
50 | #define DRIVER_AUTHOR "Deti Fliegl, deti@fliegl.de" | |
51 | #define DRIVER_DESC "DAB-USB Interface Driver for Linux (c)1999" | |
52 | ||
53 | /* --------------------------------------------------------------------- */ | |
54 | ||
55 | #ifdef CONFIG_USB_DYNAMIC_MINORS | |
56 | #define NRDABUSB 256 | |
57 | #else | |
58 | #define NRDABUSB 4 | |
59 | #endif | |
60 | ||
61 | /*-------------------------------------------------------------------*/ | |
62 | ||
63 | static dabusb_t dabusb[NRDABUSB]; | |
64 | static int buffers = 256; | |
65 | static struct usb_driver dabusb_driver; | |
66 | ||
67 | /*-------------------------------------------------------------------*/ | |
68 | ||
69 | static int dabusb_add_buf_tail (pdabusb_t s, struct list_head *dst, struct list_head *src) | |
70 | { | |
71 | unsigned long flags; | |
72 | struct list_head *tmp; | |
73 | int ret = 0; | |
74 | ||
75 | spin_lock_irqsave (&s->lock, flags); | |
76 | ||
77 | if (list_empty (src)) { | |
78 | // no elements in source buffer | |
79 | ret = -1; | |
80 | goto err; | |
81 | } | |
82 | tmp = src->next; | |
83 | list_move_tail (tmp, dst); | |
84 | ||
85 | err: spin_unlock_irqrestore (&s->lock, flags); | |
86 | return ret; | |
87 | } | |
88 | /*-------------------------------------------------------------------*/ | |
d56410e0 | 89 | #ifdef DEBUG |
1da177e4 LT |
90 | static void dump_urb (struct urb *urb) |
91 | { | |
92 | dbg("urb :%p", urb); | |
93 | dbg("dev :%p", urb->dev); | |
94 | dbg("pipe :%08X", urb->pipe); | |
95 | dbg("status :%d", urb->status); | |
96 | dbg("transfer_flags :%08X", urb->transfer_flags); | |
97 | dbg("transfer_buffer :%p", urb->transfer_buffer); | |
98 | dbg("transfer_buffer_length:%d", urb->transfer_buffer_length); | |
99 | dbg("actual_length :%d", urb->actual_length); | |
100 | dbg("setup_packet :%p", urb->setup_packet); | |
101 | dbg("start_frame :%d", urb->start_frame); | |
102 | dbg("number_of_packets :%d", urb->number_of_packets); | |
103 | dbg("interval :%d", urb->interval); | |
104 | dbg("error_count :%d", urb->error_count); | |
105 | dbg("context :%p", urb->context); | |
106 | dbg("complete :%p", urb->complete); | |
107 | } | |
108 | #endif | |
109 | /*-------------------------------------------------------------------*/ | |
110 | static int dabusb_cancel_queue (pdabusb_t s, struct list_head *q) | |
111 | { | |
112 | unsigned long flags; | |
113 | pbuff_t b; | |
114 | ||
115 | dbg("dabusb_cancel_queue"); | |
116 | ||
117 | spin_lock_irqsave (&s->lock, flags); | |
118 | ||
119 | list_for_each_entry(b, q, buff_list) { | |
120 | #ifdef DEBUG | |
121 | dump_urb(b->purb); | |
122 | #endif | |
123 | usb_unlink_urb (b->purb); | |
124 | } | |
125 | spin_unlock_irqrestore (&s->lock, flags); | |
126 | return 0; | |
127 | } | |
128 | /*-------------------------------------------------------------------*/ | |
129 | static int dabusb_free_queue (struct list_head *q) | |
130 | { | |
131 | struct list_head *tmp; | |
132 | struct list_head *p; | |
133 | pbuff_t b; | |
134 | ||
135 | dbg("dabusb_free_queue"); | |
136 | for (p = q->next; p != q;) { | |
137 | b = list_entry (p, buff_t, buff_list); | |
138 | ||
d56410e0 | 139 | #ifdef DEBUG |
1da177e4 LT |
140 | dump_urb(b->purb); |
141 | #endif | |
1bc3c9e1 | 142 | kfree(b->purb->transfer_buffer); |
1da177e4 LT |
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 | /*-------------------------------------------------------------------*/ | |
7d12e780 | 169 | static void dabusb_iso_complete (struct urb *purb) |
1da177e4 LT |
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 | |
aa82661b | 195 | dev_warn(&purb->dev->dev, "dabusb_iso_complete: corrupted packet status: %d\n", purb->iso_frame_desc[i].status); |
1da177e4 LT |
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 | { | |
6f289675 | 209 | int transfer_len = 0; |
1da177e4 LT |
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 | ||
6f289675 | 220 | while (transfer_len < (s->total_buffer_size << 10)) { |
5cbded58 | 221 | b = kzalloc(sizeof (buff_t), GFP_KERNEL); |
1da177e4 | 222 | if (!b) { |
d8e298dc | 223 | err("kzalloc(sizeof(buff_t))==NULL"); |
1da177e4 LT |
224 | goto err; |
225 | } | |
1da177e4 LT |
226 | b->s = s; |
227 | b->purb = usb_alloc_urb(packets, GFP_KERNEL); | |
228 | if (!b->purb) { | |
229 | err("usb_alloc_urb == NULL"); | |
230 | kfree (b); | |
231 | goto err; | |
232 | } | |
233 | ||
234 | b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL); | |
235 | if (!b->purb->transfer_buffer) { | |
236 | kfree (b->purb); | |
237 | kfree (b); | |
238 | err("kmalloc(%d)==NULL", transfer_buffer_length); | |
239 | goto err; | |
240 | } | |
241 | ||
242 | b->purb->transfer_buffer_length = transfer_buffer_length; | |
243 | b->purb->number_of_packets = packets; | |
244 | b->purb->complete = dabusb_iso_complete; | |
245 | b->purb->context = b; | |
246 | b->purb->dev = s->usbdev; | |
247 | b->purb->pipe = pipe; | |
248 | b->purb->transfer_flags = URB_ISO_ASAP; | |
249 | ||
250 | for (i = 0; i < packets; i++) { | |
251 | b->purb->iso_frame_desc[i].offset = i * pipesize; | |
252 | b->purb->iso_frame_desc[i].length = pipesize; | |
253 | } | |
254 | ||
6f289675 | 255 | transfer_len += transfer_buffer_length; |
1da177e4 LT |
256 | list_add_tail (&b->buff_list, &s->free_buff_list); |
257 | } | |
6f289675 | 258 | s->got_mem = transfer_len; |
1da177e4 LT |
259 | |
260 | return 0; | |
261 | ||
262 | err: | |
263 | dabusb_free_buffers (s); | |
264 | return -ENOMEM; | |
265 | } | |
266 | /*-------------------------------------------------------------------*/ | |
267 | static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb) | |
268 | { | |
269 | int ret; | |
270 | unsigned int pipe; | |
271 | int actual_length; | |
272 | ||
273 | dbg("dabusb_bulk"); | |
274 | ||
275 | if (!pb->pipe) | |
276 | pipe = usb_rcvbulkpipe (s->usbdev, 2); | |
277 | else | |
278 | pipe = usb_sndbulkpipe (s->usbdev, 2); | |
279 | ||
280 | ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100); | |
281 | if(ret<0) { | |
282 | err("dabusb: usb_bulk_msg failed(%d)",ret); | |
283 | ||
284 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
285 | err("set_interface failed"); | |
286 | return -EINVAL; | |
287 | } | |
288 | ||
289 | } | |
d56410e0 | 290 | |
1da177e4 | 291 | if( ret == -EPIPE ) { |
aa82661b | 292 | dev_warn(&s->usbdev->dev, "CLEAR_FEATURE request to remove STALL condition.\n"); |
1da177e4 LT |
293 | if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe))) |
294 | err("request failed"); | |
295 | } | |
296 | ||
297 | pb->size = actual_length; | |
298 | return ret; | |
299 | } | |
300 | /* --------------------------------------------------------------------- */ | |
c4667746 DW |
301 | static int dabusb_writemem (pdabusb_t s, int pos, const unsigned char *data, |
302 | int len) | |
1da177e4 LT |
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; | |
c4667746 DW |
329 | const struct ihex_binrec *rec; |
330 | const struct firmware *fw; | |
1da177e4 LT |
331 | |
332 | dbg("Enter dabusb_loadmem (internal)"); | |
d56410e0 | 333 | |
c4667746 DW |
334 | ret = request_ihex_firmware(&fw, "dabusb/firmware.fw", &s->usbdev->dev); |
335 | if (ret) { | |
336 | err("Failed to load \"dabusb/firmware.fw\": %d\n", ret); | |
337 | goto out; | |
338 | } | |
1da177e4 | 339 | ret = dabusb_8051_reset (s, 1); |
1da177e4 | 340 | |
c4667746 DW |
341 | for (rec = (const struct ihex_binrec *)fw->data; rec; |
342 | rec = ihex_next_binrec(rec)) { | |
343 | dbg("dabusb_writemem: %04X %p %d)", be32_to_cpu(rec->addr), | |
344 | rec->data, be16_to_cpu(rec->len)); | |
1da177e4 | 345 | |
c4667746 DW |
346 | ret = dabusb_writemem(s, be32_to_cpu(rec->addr), rec->data, |
347 | be16_to_cpu(rec->len)); | |
1da177e4 | 348 | if (ret < 0) { |
c4667746 DW |
349 | err("dabusb_writemem failed (%d %04X %p %d)", ret, |
350 | be32_to_cpu(rec->addr), rec->data, | |
351 | be16_to_cpu(rec->len)); | |
1da177e4 LT |
352 | break; |
353 | } | |
1da177e4 LT |
354 | } |
355 | ret = dabusb_8051_reset (s, 0); | |
c4667746 DW |
356 | release_firmware(fw); |
357 | out: | |
1da177e4 LT |
358 | dbg("dabusb_loadmem: exit"); |
359 | ||
360 | return ret; | |
361 | } | |
362 | /* --------------------------------------------------------------------- */ | |
363 | static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b) | |
364 | { | |
365 | b->size = 4; | |
366 | b->data[0] = 0x2a; | |
367 | b->data[1] = 0; | |
368 | b->data[2] = 0; | |
369 | b->data[3] = 0; | |
370 | ||
371 | dbg("dabusb_fpga_clear"); | |
372 | ||
373 | return dabusb_bulk (s, b); | |
374 | } | |
375 | /* --------------------------------------------------------------------- */ | |
376 | static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b) | |
377 | { | |
378 | b->size = 4; | |
379 | b->data[0] = 0x2c; | |
380 | b->data[1] = 0; | |
381 | b->data[2] = 0; | |
382 | b->data[3] = 0; | |
383 | ||
384 | dbg("dabusb_fpga_init"); | |
385 | ||
386 | return dabusb_bulk (s, b); | |
387 | } | |
388 | /* --------------------------------------------------------------------- */ | |
389 | static int dabusb_fpga_download (pdabusb_t s, const char *fname) | |
390 | { | |
391 | pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL); | |
c4667746 | 392 | const struct firmware *fw; |
1da177e4 LT |
393 | unsigned int blen, n; |
394 | int ret; | |
1da177e4 LT |
395 | |
396 | dbg("Enter dabusb_fpga_download (internal)"); | |
397 | ||
398 | if (!b) { | |
399 | err("kmalloc(sizeof(bulk_transfer_t))==NULL"); | |
400 | return -ENOMEM; | |
401 | } | |
402 | ||
c4667746 DW |
403 | ret = request_firmware(&fw, "dabusb/bitstream.bin", &s->usbdev->dev); |
404 | if (ret) { | |
405 | err("Failed to load \"dabusb/bitstream.bin\": %d\n", ret); | |
02c0267a | 406 | kfree(b); |
c4667746 DW |
407 | return ret; |
408 | } | |
409 | ||
1da177e4 LT |
410 | b->pipe = 1; |
411 | ret = dabusb_fpga_clear (s, b); | |
412 | mdelay (10); | |
c4667746 | 413 | blen = fw->data[73] + (fw->data[72] << 8); |
1da177e4 LT |
414 | |
415 | dbg("Bitstream len: %i", blen); | |
416 | ||
417 | b->data[0] = 0x2b; | |
418 | b->data[1] = 0; | |
419 | b->data[2] = 0; | |
420 | b->data[3] = 60; | |
421 | ||
422 | for (n = 0; n <= blen + 60; n += 60) { | |
423 | // some cclks for startup | |
424 | b->size = 64; | |
c4667746 | 425 | memcpy (b->data + 4, fw->data + 74 + n, 60); |
1da177e4 LT |
426 | ret = dabusb_bulk (s, b); |
427 | if (ret < 0) { | |
428 | err("dabusb_bulk failed."); | |
429 | break; | |
430 | } | |
431 | mdelay (1); | |
432 | } | |
433 | ||
434 | ret = dabusb_fpga_init (s, b); | |
435 | kfree (b); | |
c4667746 | 436 | release_firmware(fw); |
1da177e4 LT |
437 | |
438 | dbg("exit dabusb_fpga_download"); | |
439 | ||
440 | return ret; | |
441 | } | |
442 | ||
443 | static int dabusb_stop (pdabusb_t s) | |
444 | { | |
445 | dbg("dabusb_stop"); | |
446 | ||
447 | s->state = _stopped; | |
448 | dabusb_cancel_queue (s, &s->rec_buff_list); | |
449 | ||
450 | dbg("pending_io: %d", s->pending_io.counter); | |
451 | ||
452 | s->pending_io.counter = 0; | |
453 | return 0; | |
454 | } | |
455 | ||
456 | static int dabusb_startrek (pdabusb_t s) | |
457 | { | |
458 | if (!s->got_mem && s->state != _started) { | |
459 | ||
460 | dbg("dabusb_startrek"); | |
461 | ||
462 | if (dabusb_alloc_buffers (s) < 0) | |
463 | return -ENOMEM; | |
464 | dabusb_stop (s); | |
465 | s->state = _started; | |
466 | s->readptr = 0; | |
467 | } | |
468 | ||
469 | if (!list_empty (&s->free_buff_list)) { | |
470 | pbuff_t end; | |
471 | int ret; | |
d56410e0 | 472 | |
1da177e4 LT |
473 | while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) { |
474 | ||
475 | dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list); | |
476 | ||
477 | end = list_entry (s->rec_buff_list.prev, buff_t, buff_list); | |
478 | ||
479 | ret = usb_submit_urb (end->purb, GFP_KERNEL); | |
480 | if (ret) { | |
481 | err("usb_submit_urb returned:%d", ret); | |
482 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) | |
483 | err("startrek: dabusb_add_buf_tail failed"); | |
484 | break; | |
485 | } | |
486 | else | |
487 | atomic_inc (&s->pending_io); | |
488 | } | |
489 | dbg("pending_io: %d",s->pending_io.counter); | |
490 | } | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
495 | static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos) | |
496 | { | |
497 | pdabusb_t s = (pdabusb_t) file->private_data; | |
498 | unsigned long flags; | |
499 | unsigned ret = 0; | |
500 | int rem; | |
501 | int cnt; | |
502 | pbuff_t b; | |
503 | struct urb *purb = NULL; | |
504 | ||
505 | dbg("dabusb_read"); | |
506 | ||
507 | if (*ppos) | |
508 | return -ESPIPE; | |
509 | ||
510 | if (s->remove_pending) | |
511 | return -EIO; | |
512 | ||
513 | ||
514 | if (!s->usbdev) | |
515 | return -EIO; | |
516 | ||
517 | while (count > 0) { | |
518 | dabusb_startrek (s); | |
519 | ||
520 | spin_lock_irqsave (&s->lock, flags); | |
521 | ||
522 | if (list_empty (&s->rec_buff_list)) { | |
523 | ||
524 | spin_unlock_irqrestore(&s->lock, flags); | |
525 | ||
526 | err("error: rec_buf_list is empty"); | |
527 | goto err; | |
528 | } | |
d56410e0 | 529 | |
1da177e4 LT |
530 | b = list_entry (s->rec_buff_list.next, buff_t, buff_list); |
531 | purb = b->purb; | |
532 | ||
533 | spin_unlock_irqrestore(&s->lock, flags); | |
534 | ||
535 | if (purb->status == -EINPROGRESS) { | |
536 | if (file->f_flags & O_NONBLOCK) // return nonblocking | |
537 | { | |
538 | if (!ret) | |
539 | ret = -EAGAIN; | |
540 | goto err; | |
541 | } | |
542 | ||
543 | interruptible_sleep_on (&s->wait); | |
544 | ||
545 | if (signal_pending (current)) { | |
546 | if (!ret) | |
547 | ret = -ERESTARTSYS; | |
548 | goto err; | |
549 | } | |
550 | ||
551 | spin_lock_irqsave (&s->lock, flags); | |
552 | ||
553 | if (list_empty (&s->rec_buff_list)) { | |
554 | spin_unlock_irqrestore(&s->lock, flags); | |
555 | err("error: still no buffer available."); | |
556 | goto err; | |
557 | } | |
558 | spin_unlock_irqrestore(&s->lock, flags); | |
559 | s->readptr = 0; | |
560 | } | |
561 | if (s->remove_pending) { | |
562 | ret = -EIO; | |
563 | goto err; | |
564 | } | |
565 | ||
566 | rem = purb->actual_length - s->readptr; // set remaining bytes to copy | |
567 | ||
568 | if (count >= rem) | |
569 | cnt = rem; | |
570 | else | |
571 | cnt = count; | |
572 | ||
573 | dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt); | |
574 | ||
575 | if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) { | |
576 | err("read: copy_to_user failed"); | |
577 | if (!ret) | |
578 | ret = -EFAULT; | |
579 | goto err; | |
580 | } | |
581 | ||
582 | s->readptr += cnt; | |
583 | count -= cnt; | |
584 | buf += cnt; | |
585 | ret += cnt; | |
586 | ||
587 | if (s->readptr == purb->actual_length) { | |
588 | // finished, take next buffer | |
589 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) | |
590 | err("read: dabusb_add_buf_tail failed"); | |
591 | s->readptr = 0; | |
592 | } | |
593 | } | |
4186ecf8 | 594 | err: //mutex_unlock(&s->mutex); |
1da177e4 LT |
595 | return ret; |
596 | } | |
597 | ||
598 | static int dabusb_open (struct inode *inode, struct file *file) | |
599 | { | |
600 | int devnum = iminor(inode); | |
601 | pdabusb_t s; | |
602 | ||
603 | if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB)) | |
604 | return -EIO; | |
605 | ||
606 | s = &dabusb[devnum - DABUSB_MINOR]; | |
607 | ||
608 | dbg("dabusb_open"); | |
4186ecf8 | 609 | mutex_lock(&s->mutex); |
1da177e4 LT |
610 | |
611 | while (!s->usbdev || s->opened) { | |
4186ecf8 | 612 | mutex_unlock(&s->mutex); |
1da177e4 LT |
613 | |
614 | if (file->f_flags & O_NONBLOCK) { | |
615 | return -EBUSY; | |
616 | } | |
617 | msleep_interruptible(500); | |
618 | ||
619 | if (signal_pending (current)) { | |
620 | return -EAGAIN; | |
621 | } | |
4186ecf8 | 622 | mutex_lock(&s->mutex); |
1da177e4 LT |
623 | } |
624 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
4186ecf8 | 625 | mutex_unlock(&s->mutex); |
1da177e4 LT |
626 | err("set_interface failed"); |
627 | return -EINVAL; | |
628 | } | |
629 | s->opened = 1; | |
4186ecf8 | 630 | mutex_unlock(&s->mutex); |
1da177e4 LT |
631 | |
632 | file->f_pos = 0; | |
633 | file->private_data = s; | |
634 | ||
635 | return nonseekable_open(inode, file); | |
636 | } | |
637 | ||
638 | static int dabusb_release (struct inode *inode, struct file *file) | |
639 | { | |
640 | pdabusb_t s = (pdabusb_t) file->private_data; | |
641 | ||
642 | dbg("dabusb_release"); | |
643 | ||
4186ecf8 | 644 | mutex_lock(&s->mutex); |
1da177e4 LT |
645 | dabusb_stop (s); |
646 | dabusb_free_buffers (s); | |
4186ecf8 | 647 | mutex_unlock(&s->mutex); |
1da177e4 LT |
648 | |
649 | if (!s->remove_pending) { | |
650 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) | |
651 | err("set_interface failed"); | |
652 | } | |
653 | else | |
654 | wake_up (&s->remove_ok); | |
655 | ||
656 | s->opened = 0; | |
657 | return 0; | |
658 | } | |
659 | ||
660 | static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
661 | { | |
662 | pdabusb_t s = (pdabusb_t) file->private_data; | |
663 | pbulk_transfer_t pbulk; | |
664 | int ret = 0; | |
665 | int version = DABUSB_VERSION; | |
666 | ||
667 | dbg("dabusb_ioctl"); | |
668 | ||
669 | if (s->remove_pending) | |
670 | return -EIO; | |
671 | ||
4186ecf8 | 672 | mutex_lock(&s->mutex); |
1da177e4 LT |
673 | |
674 | if (!s->usbdev) { | |
4186ecf8 | 675 | mutex_unlock(&s->mutex); |
1da177e4 LT |
676 | return -EIO; |
677 | } | |
678 | ||
679 | switch (cmd) { | |
680 | ||
681 | case IOCTL_DAB_BULK: | |
5cbded58 | 682 | pbulk = kmalloc(sizeof (bulk_transfer_t), GFP_KERNEL); |
1da177e4 LT |
683 | |
684 | if (!pbulk) { | |
685 | ret = -ENOMEM; | |
686 | break; | |
687 | } | |
688 | ||
689 | if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) { | |
690 | ret = -EFAULT; | |
691 | kfree (pbulk); | |
692 | break; | |
693 | } | |
694 | ||
695 | ret=dabusb_bulk (s, pbulk); | |
696 | if(ret==0) | |
697 | if (copy_to_user((void __user *)arg, pbulk, | |
698 | sizeof(bulk_transfer_t))) | |
699 | ret = -EFAULT; | |
700 | kfree (pbulk); | |
701 | break; | |
702 | ||
703 | case IOCTL_DAB_OVERRUNS: | |
704 | ret = put_user (s->overruns, (unsigned int __user *) arg); | |
705 | break; | |
706 | ||
707 | case IOCTL_DAB_VERSION: | |
708 | ret = put_user (version, (unsigned int __user *) arg); | |
709 | break; | |
710 | ||
711 | default: | |
712 | ret = -ENOIOCTLCMD; | |
713 | break; | |
714 | } | |
4186ecf8 | 715 | mutex_unlock(&s->mutex); |
1da177e4 LT |
716 | return ret; |
717 | } | |
718 | ||
fa027c2a | 719 | static const struct file_operations dabusb_fops = |
1da177e4 LT |
720 | { |
721 | .owner = THIS_MODULE, | |
722 | .llseek = no_llseek, | |
723 | .read = dabusb_read, | |
724 | .ioctl = dabusb_ioctl, | |
725 | .open = dabusb_open, | |
726 | .release = dabusb_release, | |
727 | }; | |
728 | ||
729 | static struct usb_class_driver dabusb_class = { | |
d6e5bcf4 | 730 | .name = "dabusb%d", |
1da177e4 | 731 | .fops = &dabusb_fops, |
1da177e4 LT |
732 | .minor_base = DABUSB_MINOR, |
733 | }; | |
734 | ||
735 | ||
736 | /* --------------------------------------------------------------------- */ | |
737 | static int dabusb_probe (struct usb_interface *intf, | |
738 | const struct usb_device_id *id) | |
739 | { | |
740 | struct usb_device *usbdev = interface_to_usbdev(intf); | |
741 | int retval; | |
742 | pdabusb_t s; | |
743 | ||
744 | dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d", | |
745 | le16_to_cpu(usbdev->descriptor.idVendor), | |
746 | le16_to_cpu(usbdev->descriptor.idProduct), | |
747 | intf->altsetting->desc.bInterfaceNumber); | |
748 | ||
749 | /* We don't handle multiple configurations */ | |
750 | if (usbdev->descriptor.bNumConfigurations != 1) | |
751 | return -ENODEV; | |
752 | ||
753 | if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF && | |
754 | le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999) | |
755 | return -ENODEV; | |
756 | ||
757 | ||
758 | ||
759 | s = &dabusb[intf->minor]; | |
760 | ||
4186ecf8 | 761 | mutex_lock(&s->mutex); |
1da177e4 LT |
762 | s->remove_pending = 0; |
763 | s->usbdev = usbdev; | |
764 | s->devnum = intf->minor; | |
765 | ||
766 | if (usb_reset_configuration (usbdev) < 0) { | |
767 | err("reset_configuration failed"); | |
768 | goto reject; | |
769 | } | |
770 | if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) { | |
771 | dabusb_loadmem (s, NULL); | |
772 | goto reject; | |
773 | } | |
774 | else { | |
775 | dabusb_fpga_download (s, NULL); | |
776 | ||
777 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) { | |
778 | err("set_interface failed"); | |
779 | goto reject; | |
780 | } | |
781 | } | |
782 | dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber); | |
783 | usb_set_intfdata (intf, s); | |
4186ecf8 | 784 | mutex_unlock(&s->mutex); |
1da177e4 LT |
785 | |
786 | retval = usb_register_dev(intf, &dabusb_class); | |
787 | if (retval) { | |
788 | usb_set_intfdata (intf, NULL); | |
789 | return -ENOMEM; | |
790 | } | |
791 | ||
792 | return 0; | |
793 | ||
794 | reject: | |
4186ecf8 | 795 | mutex_unlock(&s->mutex); |
1da177e4 LT |
796 | s->usbdev = NULL; |
797 | return -ENODEV; | |
798 | } | |
799 | ||
800 | static void dabusb_disconnect (struct usb_interface *intf) | |
801 | { | |
802 | wait_queue_t __wait; | |
803 | pdabusb_t s = usb_get_intfdata (intf); | |
804 | ||
805 | dbg("dabusb_disconnect"); | |
d56410e0 | 806 | |
1da177e4 | 807 | init_waitqueue_entry(&__wait, current); |
d56410e0 | 808 | |
1da177e4 LT |
809 | usb_set_intfdata (intf, NULL); |
810 | if (s) { | |
811 | usb_deregister_dev (intf, &dabusb_class); | |
812 | s->remove_pending = 1; | |
813 | wake_up (&s->wait); | |
814 | add_wait_queue(&s->remove_ok, &__wait); | |
815 | set_current_state(TASK_UNINTERRUPTIBLE); | |
816 | if (s->state == _started) | |
817 | schedule(); | |
818 | current->state = TASK_RUNNING; | |
819 | remove_wait_queue(&s->remove_ok, &__wait); | |
d56410e0 | 820 | |
1da177e4 LT |
821 | s->usbdev = NULL; |
822 | s->overruns = 0; | |
823 | } | |
824 | } | |
825 | ||
826 | static struct usb_device_id dabusb_ids [] = { | |
827 | // { USB_DEVICE(0x0547, 0x2131) }, /* An2131 chip, no boot ROM */ | |
828 | { USB_DEVICE(0x0547, 0x9999) }, | |
829 | { } /* Terminating entry */ | |
830 | }; | |
831 | ||
832 | MODULE_DEVICE_TABLE (usb, dabusb_ids); | |
833 | ||
834 | static struct usb_driver dabusb_driver = { | |
1da177e4 LT |
835 | .name = "dabusb", |
836 | .probe = dabusb_probe, | |
837 | .disconnect = dabusb_disconnect, | |
838 | .id_table = dabusb_ids, | |
839 | }; | |
840 | ||
841 | /* --------------------------------------------------------------------- */ | |
842 | ||
843 | static int __init dabusb_init (void) | |
844 | { | |
845 | int retval; | |
846 | unsigned u; | |
847 | ||
848 | /* initialize struct */ | |
849 | for (u = 0; u < NRDABUSB; u++) { | |
850 | pdabusb_t s = &dabusb[u]; | |
851 | memset (s, 0, sizeof (dabusb_t)); | |
4186ecf8 | 852 | mutex_init (&s->mutex); |
1da177e4 LT |
853 | s->usbdev = NULL; |
854 | s->total_buffer_size = buffers; | |
855 | init_waitqueue_head (&s->wait); | |
856 | init_waitqueue_head (&s->remove_ok); | |
857 | spin_lock_init (&s->lock); | |
858 | INIT_LIST_HEAD (&s->free_buff_list); | |
859 | INIT_LIST_HEAD (&s->rec_buff_list); | |
860 | } | |
861 | ||
862 | /* register misc device */ | |
863 | retval = usb_register(&dabusb_driver); | |
864 | if (retval) | |
865 | goto out; | |
866 | ||
867 | dbg("dabusb_init: driver registered"); | |
868 | ||
a482f327 GKH |
869 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
870 | DRIVER_DESC "\n"); | |
1da177e4 LT |
871 | |
872 | out: | |
873 | return retval; | |
874 | } | |
875 | ||
876 | static void __exit dabusb_cleanup (void) | |
877 | { | |
878 | dbg("dabusb_cleanup"); | |
879 | ||
880 | usb_deregister (&dabusb_driver); | |
881 | } | |
882 | ||
883 | /* --------------------------------------------------------------------- */ | |
884 | ||
885 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
886 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
887 | MODULE_LICENSE("GPL"); | |
888 | ||
889 | module_param(buffers, int, 0); | |
890 | MODULE_PARM_DESC (buffers, "Number of buffers (default=256)"); | |
891 | ||
892 | module_init (dabusb_init); | |
893 | module_exit (dabusb_cleanup); | |
894 | ||
895 | /* --------------------------------------------------------------------- */ |