Commit | Line | Data |
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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 | |
be9ed511 MCC |
192 | dev_err(&purb->dev->dev, |
193 | "dabusb_iso_complete: invalid len %d\n", len); | |
1da177e4 LT |
194 | } |
195 | else | |
aa82661b | 196 | dev_warn(&purb->dev->dev, "dabusb_iso_complete: corrupted packet status: %d\n", purb->iso_frame_desc[i].status); |
1da177e4 | 197 | if (dst != purb->actual_length) |
be9ed511 MCC |
198 | dev_err(&purb->dev->dev, |
199 | "dst!=purb->actual_length:%d!=%d\n", | |
200 | dst, purb->actual_length); | |
1da177e4 LT |
201 | } |
202 | ||
203 | if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) { | |
204 | s->overruns++; | |
be9ed511 | 205 | dev_err(&purb->dev->dev, "overrun (%d)\n", s->overruns); |
1da177e4 LT |
206 | } |
207 | wake_up (&s->wait); | |
208 | } | |
209 | /*-------------------------------------------------------------------*/ | |
210 | static int dabusb_alloc_buffers (pdabusb_t s) | |
211 | { | |
6f289675 | 212 | int transfer_len = 0; |
1da177e4 LT |
213 | pbuff_t b; |
214 | unsigned int pipe = usb_rcvisocpipe (s->usbdev, _DABUSB_ISOPIPE); | |
215 | int pipesize = usb_maxpacket (s->usbdev, pipe, usb_pipeout (pipe)); | |
216 | int packets = _ISOPIPESIZE / pipesize; | |
217 | int transfer_buffer_length = packets * pipesize; | |
218 | int i; | |
219 | ||
220 | dbg("dabusb_alloc_buffers pipesize:%d packets:%d transfer_buffer_len:%d", | |
221 | pipesize, packets, transfer_buffer_length); | |
222 | ||
6f289675 | 223 | while (transfer_len < (s->total_buffer_size << 10)) { |
5cbded58 | 224 | b = kzalloc(sizeof (buff_t), GFP_KERNEL); |
1da177e4 | 225 | if (!b) { |
be9ed511 MCC |
226 | dev_err(&s->usbdev->dev, |
227 | "kzalloc(sizeof(buff_t))==NULL\n"); | |
1da177e4 LT |
228 | goto err; |
229 | } | |
1da177e4 LT |
230 | b->s = s; |
231 | b->purb = usb_alloc_urb(packets, GFP_KERNEL); | |
232 | if (!b->purb) { | |
be9ed511 | 233 | dev_err(&s->usbdev->dev, "usb_alloc_urb == NULL\n"); |
1da177e4 LT |
234 | kfree (b); |
235 | goto err; | |
236 | } | |
237 | ||
238 | b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL); | |
239 | if (!b->purb->transfer_buffer) { | |
240 | kfree (b->purb); | |
241 | kfree (b); | |
be9ed511 MCC |
242 | dev_err(&s->usbdev->dev, |
243 | "kmalloc(%d)==NULL\n", transfer_buffer_length); | |
1da177e4 LT |
244 | goto err; |
245 | } | |
246 | ||
247 | b->purb->transfer_buffer_length = transfer_buffer_length; | |
248 | b->purb->number_of_packets = packets; | |
249 | b->purb->complete = dabusb_iso_complete; | |
250 | b->purb->context = b; | |
251 | b->purb->dev = s->usbdev; | |
252 | b->purb->pipe = pipe; | |
253 | b->purb->transfer_flags = URB_ISO_ASAP; | |
254 | ||
255 | for (i = 0; i < packets; i++) { | |
256 | b->purb->iso_frame_desc[i].offset = i * pipesize; | |
257 | b->purb->iso_frame_desc[i].length = pipesize; | |
258 | } | |
259 | ||
6f289675 | 260 | transfer_len += transfer_buffer_length; |
1da177e4 LT |
261 | list_add_tail (&b->buff_list, &s->free_buff_list); |
262 | } | |
6f289675 | 263 | s->got_mem = transfer_len; |
1da177e4 LT |
264 | |
265 | return 0; | |
266 | ||
267 | err: | |
268 | dabusb_free_buffers (s); | |
269 | return -ENOMEM; | |
270 | } | |
271 | /*-------------------------------------------------------------------*/ | |
272 | static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb) | |
273 | { | |
274 | int ret; | |
275 | unsigned int pipe; | |
276 | int actual_length; | |
277 | ||
278 | dbg("dabusb_bulk"); | |
279 | ||
280 | if (!pb->pipe) | |
281 | pipe = usb_rcvbulkpipe (s->usbdev, 2); | |
282 | else | |
283 | pipe = usb_sndbulkpipe (s->usbdev, 2); | |
284 | ||
285 | ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100); | |
286 | if(ret<0) { | |
be9ed511 MCC |
287 | dev_err(&s->usbdev->dev, |
288 | "usb_bulk_msg failed(%d)\n", ret); | |
1da177e4 LT |
289 | |
290 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
be9ed511 | 291 | dev_err(&s->usbdev->dev, "set_interface failed\n"); |
1da177e4 LT |
292 | return -EINVAL; |
293 | } | |
294 | ||
295 | } | |
d56410e0 | 296 | |
1da177e4 | 297 | if( ret == -EPIPE ) { |
aa82661b | 298 | dev_warn(&s->usbdev->dev, "CLEAR_FEATURE request to remove STALL condition.\n"); |
1da177e4 | 299 | if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe))) |
be9ed511 | 300 | dev_err(&s->usbdev->dev, "request failed\n"); |
1da177e4 LT |
301 | } |
302 | ||
303 | pb->size = actual_length; | |
304 | return ret; | |
305 | } | |
306 | /* --------------------------------------------------------------------- */ | |
c4667746 DW |
307 | static int dabusb_writemem (pdabusb_t s, int pos, const unsigned char *data, |
308 | int len) | |
1da177e4 LT |
309 | { |
310 | int ret; | |
311 | unsigned char *transfer_buffer = kmalloc (len, GFP_KERNEL); | |
312 | ||
313 | if (!transfer_buffer) { | |
be9ed511 MCC |
314 | dev_err(&s->usbdev->dev, |
315 | "dabusb_writemem: kmalloc(%d) failed.\n", len); | |
1da177e4 LT |
316 | return -ENOMEM; |
317 | } | |
318 | ||
319 | memcpy (transfer_buffer, data, len); | |
320 | ||
321 | ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300); | |
322 | ||
323 | kfree (transfer_buffer); | |
324 | return ret; | |
325 | } | |
326 | /* --------------------------------------------------------------------- */ | |
327 | static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit) | |
328 | { | |
329 | dbg("dabusb_8051_reset: %d",reset_bit); | |
330 | return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1); | |
331 | } | |
332 | /* --------------------------------------------------------------------- */ | |
333 | static int dabusb_loadmem (pdabusb_t s, const char *fname) | |
334 | { | |
335 | int ret; | |
c4667746 | 336 | const struct ihex_binrec *rec; |
031002d7 | 337 | const struct firmware *uninitialized_var(fw); |
1da177e4 LT |
338 | |
339 | dbg("Enter dabusb_loadmem (internal)"); | |
d56410e0 | 340 | |
c4667746 DW |
341 | ret = request_ihex_firmware(&fw, "dabusb/firmware.fw", &s->usbdev->dev); |
342 | if (ret) { | |
be9ed511 MCC |
343 | dev_err(&s->usbdev->dev, |
344 | "Failed to load \"dabusb/firmware.fw\": %d\n", ret); | |
c4667746 DW |
345 | goto out; |
346 | } | |
1da177e4 | 347 | ret = dabusb_8051_reset (s, 1); |
1da177e4 | 348 | |
c4667746 DW |
349 | for (rec = (const struct ihex_binrec *)fw->data; rec; |
350 | rec = ihex_next_binrec(rec)) { | |
351 | dbg("dabusb_writemem: %04X %p %d)", be32_to_cpu(rec->addr), | |
352 | rec->data, be16_to_cpu(rec->len)); | |
1da177e4 | 353 | |
c4667746 DW |
354 | ret = dabusb_writemem(s, be32_to_cpu(rec->addr), rec->data, |
355 | be16_to_cpu(rec->len)); | |
1da177e4 | 356 | if (ret < 0) { |
be9ed511 MCC |
357 | dev_err(&s->usbdev->dev, |
358 | "dabusb_writemem failed (%d %04X %p %d)\n", | |
359 | ret, be32_to_cpu(rec->addr), | |
360 | rec->data, be16_to_cpu(rec->len)); | |
1da177e4 LT |
361 | break; |
362 | } | |
1da177e4 LT |
363 | } |
364 | ret = dabusb_8051_reset (s, 0); | |
c4667746 DW |
365 | release_firmware(fw); |
366 | out: | |
1da177e4 LT |
367 | dbg("dabusb_loadmem: exit"); |
368 | ||
369 | return ret; | |
370 | } | |
371 | /* --------------------------------------------------------------------- */ | |
372 | static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b) | |
373 | { | |
374 | b->size = 4; | |
375 | b->data[0] = 0x2a; | |
376 | b->data[1] = 0; | |
377 | b->data[2] = 0; | |
378 | b->data[3] = 0; | |
379 | ||
380 | dbg("dabusb_fpga_clear"); | |
381 | ||
382 | return dabusb_bulk (s, b); | |
383 | } | |
384 | /* --------------------------------------------------------------------- */ | |
385 | static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b) | |
386 | { | |
387 | b->size = 4; | |
388 | b->data[0] = 0x2c; | |
389 | b->data[1] = 0; | |
390 | b->data[2] = 0; | |
391 | b->data[3] = 0; | |
392 | ||
393 | dbg("dabusb_fpga_init"); | |
394 | ||
395 | return dabusb_bulk (s, b); | |
396 | } | |
397 | /* --------------------------------------------------------------------- */ | |
398 | static int dabusb_fpga_download (pdabusb_t s, const char *fname) | |
399 | { | |
400 | pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL); | |
c4667746 | 401 | const struct firmware *fw; |
1da177e4 LT |
402 | unsigned int blen, n; |
403 | int ret; | |
1da177e4 LT |
404 | |
405 | dbg("Enter dabusb_fpga_download (internal)"); | |
406 | ||
407 | if (!b) { | |
be9ed511 MCC |
408 | dev_err(&s->usbdev->dev, |
409 | "kmalloc(sizeof(bulk_transfer_t))==NULL\n"); | |
1da177e4 LT |
410 | return -ENOMEM; |
411 | } | |
412 | ||
c4667746 DW |
413 | ret = request_firmware(&fw, "dabusb/bitstream.bin", &s->usbdev->dev); |
414 | if (ret) { | |
be9ed511 MCC |
415 | dev_err(&s->usbdev->dev, |
416 | "Failed to load \"dabusb/bitstream.bin\": %d\n", ret); | |
02c0267a | 417 | kfree(b); |
c4667746 DW |
418 | return ret; |
419 | } | |
420 | ||
1da177e4 LT |
421 | b->pipe = 1; |
422 | ret = dabusb_fpga_clear (s, b); | |
423 | mdelay (10); | |
c4667746 | 424 | blen = fw->data[73] + (fw->data[72] << 8); |
1da177e4 LT |
425 | |
426 | dbg("Bitstream len: %i", blen); | |
427 | ||
428 | b->data[0] = 0x2b; | |
429 | b->data[1] = 0; | |
430 | b->data[2] = 0; | |
431 | b->data[3] = 60; | |
432 | ||
433 | for (n = 0; n <= blen + 60; n += 60) { | |
434 | // some cclks for startup | |
435 | b->size = 64; | |
c4667746 | 436 | memcpy (b->data + 4, fw->data + 74 + n, 60); |
1da177e4 LT |
437 | ret = dabusb_bulk (s, b); |
438 | if (ret < 0) { | |
be9ed511 | 439 | dev_err(&s->usbdev->dev, "dabusb_bulk failed.\n"); |
1da177e4 LT |
440 | break; |
441 | } | |
442 | mdelay (1); | |
443 | } | |
444 | ||
445 | ret = dabusb_fpga_init (s, b); | |
446 | kfree (b); | |
c4667746 | 447 | release_firmware(fw); |
1da177e4 LT |
448 | |
449 | dbg("exit dabusb_fpga_download"); | |
450 | ||
451 | return ret; | |
452 | } | |
453 | ||
454 | static int dabusb_stop (pdabusb_t s) | |
455 | { | |
456 | dbg("dabusb_stop"); | |
457 | ||
458 | s->state = _stopped; | |
459 | dabusb_cancel_queue (s, &s->rec_buff_list); | |
460 | ||
461 | dbg("pending_io: %d", s->pending_io.counter); | |
462 | ||
463 | s->pending_io.counter = 0; | |
464 | return 0; | |
465 | } | |
466 | ||
467 | static int dabusb_startrek (pdabusb_t s) | |
468 | { | |
469 | if (!s->got_mem && s->state != _started) { | |
470 | ||
471 | dbg("dabusb_startrek"); | |
472 | ||
473 | if (dabusb_alloc_buffers (s) < 0) | |
474 | return -ENOMEM; | |
475 | dabusb_stop (s); | |
476 | s->state = _started; | |
477 | s->readptr = 0; | |
478 | } | |
479 | ||
480 | if (!list_empty (&s->free_buff_list)) { | |
481 | pbuff_t end; | |
482 | int ret; | |
d56410e0 | 483 | |
1da177e4 LT |
484 | while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) { |
485 | ||
486 | dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list); | |
487 | ||
488 | end = list_entry (s->rec_buff_list.prev, buff_t, buff_list); | |
489 | ||
490 | ret = usb_submit_urb (end->purb, GFP_KERNEL); | |
491 | if (ret) { | |
be9ed511 MCC |
492 | dev_err(&s->usbdev->dev, |
493 | "usb_submit_urb returned:%d\n", ret); | |
1da177e4 | 494 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) |
be9ed511 MCC |
495 | dev_err(&s->usbdev->dev, |
496 | "startrek: dabusb_add_buf_tail failed\n"); | |
1da177e4 LT |
497 | break; |
498 | } | |
499 | else | |
500 | atomic_inc (&s->pending_io); | |
501 | } | |
502 | dbg("pending_io: %d",s->pending_io.counter); | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos) | |
509 | { | |
510 | pdabusb_t s = (pdabusb_t) file->private_data; | |
511 | unsigned long flags; | |
512 | unsigned ret = 0; | |
513 | int rem; | |
514 | int cnt; | |
515 | pbuff_t b; | |
516 | struct urb *purb = NULL; | |
517 | ||
518 | dbg("dabusb_read"); | |
519 | ||
520 | if (*ppos) | |
521 | return -ESPIPE; | |
522 | ||
523 | if (s->remove_pending) | |
524 | return -EIO; | |
525 | ||
526 | ||
527 | if (!s->usbdev) | |
528 | return -EIO; | |
529 | ||
530 | while (count > 0) { | |
531 | dabusb_startrek (s); | |
532 | ||
533 | spin_lock_irqsave (&s->lock, flags); | |
534 | ||
535 | if (list_empty (&s->rec_buff_list)) { | |
536 | ||
537 | spin_unlock_irqrestore(&s->lock, flags); | |
538 | ||
be9ed511 MCC |
539 | dev_err(&s->usbdev->dev, |
540 | "error: rec_buf_list is empty\n"); | |
1da177e4 LT |
541 | goto err; |
542 | } | |
d56410e0 | 543 | |
1da177e4 LT |
544 | b = list_entry (s->rec_buff_list.next, buff_t, buff_list); |
545 | purb = b->purb; | |
546 | ||
547 | spin_unlock_irqrestore(&s->lock, flags); | |
548 | ||
549 | if (purb->status == -EINPROGRESS) { | |
550 | if (file->f_flags & O_NONBLOCK) // return nonblocking | |
551 | { | |
552 | if (!ret) | |
553 | ret = -EAGAIN; | |
554 | goto err; | |
555 | } | |
556 | ||
557 | interruptible_sleep_on (&s->wait); | |
558 | ||
559 | if (signal_pending (current)) { | |
560 | if (!ret) | |
561 | ret = -ERESTARTSYS; | |
562 | goto err; | |
563 | } | |
564 | ||
565 | spin_lock_irqsave (&s->lock, flags); | |
566 | ||
567 | if (list_empty (&s->rec_buff_list)) { | |
568 | spin_unlock_irqrestore(&s->lock, flags); | |
be9ed511 MCC |
569 | dev_err(&s->usbdev->dev, |
570 | "error: still no buffer available.\n"); | |
1da177e4 LT |
571 | goto err; |
572 | } | |
573 | spin_unlock_irqrestore(&s->lock, flags); | |
574 | s->readptr = 0; | |
575 | } | |
576 | if (s->remove_pending) { | |
577 | ret = -EIO; | |
578 | goto err; | |
579 | } | |
580 | ||
581 | rem = purb->actual_length - s->readptr; // set remaining bytes to copy | |
582 | ||
583 | if (count >= rem) | |
584 | cnt = rem; | |
585 | else | |
586 | cnt = count; | |
587 | ||
588 | dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt); | |
589 | ||
590 | if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) { | |
be9ed511 | 591 | dev_err(&s->usbdev->dev, "read: copy_to_user failed\n"); |
1da177e4 LT |
592 | if (!ret) |
593 | ret = -EFAULT; | |
594 | goto err; | |
595 | } | |
596 | ||
597 | s->readptr += cnt; | |
598 | count -= cnt; | |
599 | buf += cnt; | |
600 | ret += cnt; | |
601 | ||
602 | if (s->readptr == purb->actual_length) { | |
603 | // finished, take next buffer | |
604 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) | |
be9ed511 MCC |
605 | dev_err(&s->usbdev->dev, |
606 | "read: dabusb_add_buf_tail failed\n"); | |
1da177e4 LT |
607 | s->readptr = 0; |
608 | } | |
609 | } | |
4186ecf8 | 610 | err: //mutex_unlock(&s->mutex); |
1da177e4 LT |
611 | return ret; |
612 | } | |
613 | ||
614 | static int dabusb_open (struct inode *inode, struct file *file) | |
615 | { | |
616 | int devnum = iminor(inode); | |
617 | pdabusb_t s; | |
86266452 | 618 | int r; |
1da177e4 LT |
619 | |
620 | if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB)) | |
621 | return -EIO; | |
622 | ||
623 | s = &dabusb[devnum - DABUSB_MINOR]; | |
624 | ||
625 | dbg("dabusb_open"); | |
4186ecf8 | 626 | mutex_lock(&s->mutex); |
1da177e4 LT |
627 | |
628 | while (!s->usbdev || s->opened) { | |
4186ecf8 | 629 | mutex_unlock(&s->mutex); |
1da177e4 | 630 | |
7ff52efd | 631 | if (file->f_flags & O_NONBLOCK) |
1da177e4 | 632 | return -EBUSY; |
1da177e4 LT |
633 | msleep_interruptible(500); |
634 | ||
7ff52efd | 635 | if (signal_pending (current)) |
1da177e4 | 636 | return -EAGAIN; |
4186ecf8 | 637 | mutex_lock(&s->mutex); |
1da177e4 LT |
638 | } |
639 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
4186ecf8 | 640 | mutex_unlock(&s->mutex); |
be9ed511 | 641 | dev_err(&s->usbdev->dev, "set_interface failed\n"); |
1da177e4 LT |
642 | return -EINVAL; |
643 | } | |
644 | s->opened = 1; | |
4186ecf8 | 645 | mutex_unlock(&s->mutex); |
1da177e4 LT |
646 | |
647 | file->f_pos = 0; | |
648 | file->private_data = s; | |
649 | ||
86266452 | 650 | r = nonseekable_open(inode, file); |
86266452 | 651 | return r; |
1da177e4 LT |
652 | } |
653 | ||
654 | static int dabusb_release (struct inode *inode, struct file *file) | |
655 | { | |
656 | pdabusb_t s = (pdabusb_t) file->private_data; | |
657 | ||
658 | dbg("dabusb_release"); | |
659 | ||
4186ecf8 | 660 | mutex_lock(&s->mutex); |
1da177e4 LT |
661 | dabusb_stop (s); |
662 | dabusb_free_buffers (s); | |
4186ecf8 | 663 | mutex_unlock(&s->mutex); |
1da177e4 LT |
664 | |
665 | if (!s->remove_pending) { | |
666 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) | |
be9ed511 | 667 | dev_err(&s->usbdev->dev, "set_interface failed\n"); |
1da177e4 LT |
668 | } |
669 | else | |
670 | wake_up (&s->remove_ok); | |
671 | ||
672 | s->opened = 0; | |
673 | return 0; | |
674 | } | |
675 | ||
5ed2b641 | 676 | static long dabusb_ioctl (struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
677 | { |
678 | pdabusb_t s = (pdabusb_t) file->private_data; | |
679 | pbulk_transfer_t pbulk; | |
680 | int ret = 0; | |
681 | int version = DABUSB_VERSION; | |
682 | ||
683 | dbg("dabusb_ioctl"); | |
684 | ||
7ff52efd | 685 | if (s->remove_pending) |
1da177e4 LT |
686 | return -EIO; |
687 | ||
4186ecf8 | 688 | mutex_lock(&s->mutex); |
1da177e4 LT |
689 | |
690 | if (!s->usbdev) { | |
4186ecf8 | 691 | mutex_unlock(&s->mutex); |
1da177e4 LT |
692 | return -EIO; |
693 | } | |
694 | ||
695 | switch (cmd) { | |
696 | ||
697 | case IOCTL_DAB_BULK: | |
c6cfe055 JL |
698 | pbulk = memdup_user((void __user *)arg, |
699 | sizeof(bulk_transfer_t)); | |
1da177e4 | 700 | |
c6cfe055 JL |
701 | if (IS_ERR(pbulk)) { |
702 | ret = PTR_ERR(pbulk); | |
1da177e4 LT |
703 | break; |
704 | } | |
705 | ||
706 | ret=dabusb_bulk (s, pbulk); | |
707 | if(ret==0) | |
708 | if (copy_to_user((void __user *)arg, pbulk, | |
709 | sizeof(bulk_transfer_t))) | |
710 | ret = -EFAULT; | |
711 | kfree (pbulk); | |
712 | break; | |
713 | ||
714 | case IOCTL_DAB_OVERRUNS: | |
715 | ret = put_user (s->overruns, (unsigned int __user *) arg); | |
716 | break; | |
717 | ||
718 | case IOCTL_DAB_VERSION: | |
719 | ret = put_user (version, (unsigned int __user *) arg); | |
720 | break; | |
721 | ||
722 | default: | |
723 | ret = -ENOIOCTLCMD; | |
724 | break; | |
725 | } | |
4186ecf8 | 726 | mutex_unlock(&s->mutex); |
1da177e4 LT |
727 | return ret; |
728 | } | |
729 | ||
fa027c2a | 730 | static const struct file_operations dabusb_fops = |
1da177e4 LT |
731 | { |
732 | .owner = THIS_MODULE, | |
733 | .llseek = no_llseek, | |
734 | .read = dabusb_read, | |
5ed2b641 | 735 | .unlocked_ioctl = dabusb_ioctl, |
1da177e4 LT |
736 | .open = dabusb_open, |
737 | .release = dabusb_release, | |
738 | }; | |
739 | ||
388dba30 | 740 | static char *dabusb_devnode(struct device *dev, mode_t *mode) |
f7a386c5 KS |
741 | { |
742 | return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev)); | |
743 | } | |
744 | ||
1da177e4 | 745 | static struct usb_class_driver dabusb_class = { |
d6e5bcf4 | 746 | .name = "dabusb%d", |
388dba30 | 747 | .devnode = dabusb_devnode, |
1da177e4 | 748 | .fops = &dabusb_fops, |
1da177e4 LT |
749 | .minor_base = DABUSB_MINOR, |
750 | }; | |
751 | ||
752 | ||
753 | /* --------------------------------------------------------------------- */ | |
754 | static int dabusb_probe (struct usb_interface *intf, | |
755 | const struct usb_device_id *id) | |
756 | { | |
757 | struct usb_device *usbdev = interface_to_usbdev(intf); | |
758 | int retval; | |
759 | pdabusb_t s; | |
760 | ||
761 | dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d", | |
762 | le16_to_cpu(usbdev->descriptor.idVendor), | |
763 | le16_to_cpu(usbdev->descriptor.idProduct), | |
764 | intf->altsetting->desc.bInterfaceNumber); | |
765 | ||
766 | /* We don't handle multiple configurations */ | |
767 | if (usbdev->descriptor.bNumConfigurations != 1) | |
768 | return -ENODEV; | |
769 | ||
770 | if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF && | |
771 | le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999) | |
772 | return -ENODEV; | |
773 | ||
774 | ||
775 | ||
776 | s = &dabusb[intf->minor]; | |
777 | ||
4186ecf8 | 778 | mutex_lock(&s->mutex); |
1da177e4 LT |
779 | s->remove_pending = 0; |
780 | s->usbdev = usbdev; | |
781 | s->devnum = intf->minor; | |
782 | ||
783 | if (usb_reset_configuration (usbdev) < 0) { | |
be9ed511 | 784 | dev_err(&intf->dev, "reset_configuration failed\n"); |
1da177e4 LT |
785 | goto reject; |
786 | } | |
787 | if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) { | |
788 | dabusb_loadmem (s, NULL); | |
789 | goto reject; | |
790 | } | |
791 | else { | |
792 | dabusb_fpga_download (s, NULL); | |
793 | ||
794 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) { | |
be9ed511 | 795 | dev_err(&intf->dev, "set_interface failed\n"); |
1da177e4 LT |
796 | goto reject; |
797 | } | |
798 | } | |
799 | dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber); | |
800 | usb_set_intfdata (intf, s); | |
4186ecf8 | 801 | mutex_unlock(&s->mutex); |
1da177e4 LT |
802 | |
803 | retval = usb_register_dev(intf, &dabusb_class); | |
804 | if (retval) { | |
805 | usb_set_intfdata (intf, NULL); | |
806 | return -ENOMEM; | |
807 | } | |
808 | ||
809 | return 0; | |
810 | ||
811 | reject: | |
4186ecf8 | 812 | mutex_unlock(&s->mutex); |
1da177e4 LT |
813 | s->usbdev = NULL; |
814 | return -ENODEV; | |
815 | } | |
816 | ||
817 | static void dabusb_disconnect (struct usb_interface *intf) | |
818 | { | |
819 | wait_queue_t __wait; | |
820 | pdabusb_t s = usb_get_intfdata (intf); | |
821 | ||
822 | dbg("dabusb_disconnect"); | |
d56410e0 | 823 | |
1da177e4 | 824 | init_waitqueue_entry(&__wait, current); |
d56410e0 | 825 | |
1da177e4 LT |
826 | usb_set_intfdata (intf, NULL); |
827 | if (s) { | |
828 | usb_deregister_dev (intf, &dabusb_class); | |
829 | s->remove_pending = 1; | |
830 | wake_up (&s->wait); | |
831 | add_wait_queue(&s->remove_ok, &__wait); | |
832 | set_current_state(TASK_UNINTERRUPTIBLE); | |
833 | if (s->state == _started) | |
834 | schedule(); | |
835 | current->state = TASK_RUNNING; | |
836 | remove_wait_queue(&s->remove_ok, &__wait); | |
d56410e0 | 837 | |
1da177e4 LT |
838 | s->usbdev = NULL; |
839 | s->overruns = 0; | |
840 | } | |
841 | } | |
842 | ||
843 | static struct usb_device_id dabusb_ids [] = { | |
844 | // { USB_DEVICE(0x0547, 0x2131) }, /* An2131 chip, no boot ROM */ | |
845 | { USB_DEVICE(0x0547, 0x9999) }, | |
846 | { } /* Terminating entry */ | |
847 | }; | |
848 | ||
849 | MODULE_DEVICE_TABLE (usb, dabusb_ids); | |
850 | ||
851 | static struct usb_driver dabusb_driver = { | |
1da177e4 LT |
852 | .name = "dabusb", |
853 | .probe = dabusb_probe, | |
854 | .disconnect = dabusb_disconnect, | |
855 | .id_table = dabusb_ids, | |
856 | }; | |
857 | ||
858 | /* --------------------------------------------------------------------- */ | |
859 | ||
860 | static int __init dabusb_init (void) | |
861 | { | |
862 | int retval; | |
863 | unsigned u; | |
864 | ||
865 | /* initialize struct */ | |
866 | for (u = 0; u < NRDABUSB; u++) { | |
867 | pdabusb_t s = &dabusb[u]; | |
868 | memset (s, 0, sizeof (dabusb_t)); | |
4186ecf8 | 869 | mutex_init (&s->mutex); |
1da177e4 LT |
870 | s->usbdev = NULL; |
871 | s->total_buffer_size = buffers; | |
872 | init_waitqueue_head (&s->wait); | |
873 | init_waitqueue_head (&s->remove_ok); | |
874 | spin_lock_init (&s->lock); | |
875 | INIT_LIST_HEAD (&s->free_buff_list); | |
876 | INIT_LIST_HEAD (&s->rec_buff_list); | |
877 | } | |
878 | ||
879 | /* register misc device */ | |
880 | retval = usb_register(&dabusb_driver); | |
881 | if (retval) | |
882 | goto out; | |
883 | ||
884 | dbg("dabusb_init: driver registered"); | |
885 | ||
a482f327 GKH |
886 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
887 | DRIVER_DESC "\n"); | |
1da177e4 LT |
888 | |
889 | out: | |
890 | return retval; | |
891 | } | |
892 | ||
893 | static void __exit dabusb_cleanup (void) | |
894 | { | |
895 | dbg("dabusb_cleanup"); | |
896 | ||
897 | usb_deregister (&dabusb_driver); | |
898 | } | |
899 | ||
900 | /* --------------------------------------------------------------------- */ | |
901 | ||
902 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
903 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
904 | MODULE_LICENSE("GPL"); | |
0633255c BH |
905 | MODULE_FIRMWARE("dabusb/firmware.fw"); |
906 | MODULE_FIRMWARE("dabusb/bitstream.bin"); | |
1da177e4 LT |
907 | |
908 | module_param(buffers, int, 0); | |
909 | MODULE_PARM_DESC (buffers, "Number of buffers (default=256)"); | |
910 | ||
911 | module_init (dabusb_init); | |
912 | module_exit (dabusb_cleanup); | |
913 | ||
914 | /* --------------------------------------------------------------------- */ |