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> | |
405f5571 | 35 | #include <linux/smp_lock.h> |
1da177e4 LT |
36 | #include <linux/init.h> |
37 | #include <asm/uaccess.h> | |
38 | #include <asm/atomic.h> | |
39 | #include <linux/delay.h> | |
40 | #include <linux/usb.h> | |
4186ecf8 | 41 | #include <linux/mutex.h> |
c4667746 DW |
42 | #include <linux/firmware.h> |
43 | #include <linux/ihex.h> | |
1da177e4 LT |
44 | |
45 | #include "dabusb.h" | |
1da177e4 LT |
46 | |
47 | /* | |
48 | * Version Information | |
49 | */ | |
50 | #define DRIVER_VERSION "v1.54" | |
51 | #define DRIVER_AUTHOR "Deti Fliegl, deti@fliegl.de" | |
52 | #define DRIVER_DESC "DAB-USB Interface Driver for Linux (c)1999" | |
53 | ||
54 | /* --------------------------------------------------------------------- */ | |
55 | ||
56 | #ifdef CONFIG_USB_DYNAMIC_MINORS | |
57 | #define NRDABUSB 256 | |
58 | #else | |
59 | #define NRDABUSB 4 | |
60 | #endif | |
61 | ||
62 | /*-------------------------------------------------------------------*/ | |
63 | ||
64 | static dabusb_t dabusb[NRDABUSB]; | |
65 | static int buffers = 256; | |
66 | static struct usb_driver dabusb_driver; | |
67 | ||
68 | /*-------------------------------------------------------------------*/ | |
69 | ||
70 | static int dabusb_add_buf_tail (pdabusb_t s, struct list_head *dst, struct list_head *src) | |
71 | { | |
72 | unsigned long flags; | |
73 | struct list_head *tmp; | |
74 | int ret = 0; | |
75 | ||
76 | spin_lock_irqsave (&s->lock, flags); | |
77 | ||
78 | if (list_empty (src)) { | |
79 | // no elements in source buffer | |
80 | ret = -1; | |
81 | goto err; | |
82 | } | |
83 | tmp = src->next; | |
84 | list_move_tail (tmp, dst); | |
85 | ||
86 | err: spin_unlock_irqrestore (&s->lock, flags); | |
87 | return ret; | |
88 | } | |
89 | /*-------------------------------------------------------------------*/ | |
d56410e0 | 90 | #ifdef DEBUG |
1da177e4 LT |
91 | static void dump_urb (struct urb *urb) |
92 | { | |
93 | dbg("urb :%p", urb); | |
94 | dbg("dev :%p", urb->dev); | |
95 | dbg("pipe :%08X", urb->pipe); | |
96 | dbg("status :%d", urb->status); | |
97 | dbg("transfer_flags :%08X", urb->transfer_flags); | |
98 | dbg("transfer_buffer :%p", urb->transfer_buffer); | |
99 | dbg("transfer_buffer_length:%d", urb->transfer_buffer_length); | |
100 | dbg("actual_length :%d", urb->actual_length); | |
101 | dbg("setup_packet :%p", urb->setup_packet); | |
102 | dbg("start_frame :%d", urb->start_frame); | |
103 | dbg("number_of_packets :%d", urb->number_of_packets); | |
104 | dbg("interval :%d", urb->interval); | |
105 | dbg("error_count :%d", urb->error_count); | |
106 | dbg("context :%p", urb->context); | |
107 | dbg("complete :%p", urb->complete); | |
108 | } | |
109 | #endif | |
110 | /*-------------------------------------------------------------------*/ | |
111 | static int dabusb_cancel_queue (pdabusb_t s, struct list_head *q) | |
112 | { | |
113 | unsigned long flags; | |
114 | pbuff_t b; | |
115 | ||
116 | dbg("dabusb_cancel_queue"); | |
117 | ||
118 | spin_lock_irqsave (&s->lock, flags); | |
119 | ||
120 | list_for_each_entry(b, q, buff_list) { | |
121 | #ifdef DEBUG | |
122 | dump_urb(b->purb); | |
123 | #endif | |
124 | usb_unlink_urb (b->purb); | |
125 | } | |
126 | spin_unlock_irqrestore (&s->lock, flags); | |
127 | return 0; | |
128 | } | |
129 | /*-------------------------------------------------------------------*/ | |
130 | static int dabusb_free_queue (struct list_head *q) | |
131 | { | |
132 | struct list_head *tmp; | |
133 | struct list_head *p; | |
134 | pbuff_t b; | |
135 | ||
136 | dbg("dabusb_free_queue"); | |
137 | for (p = q->next; p != q;) { | |
138 | b = list_entry (p, buff_t, buff_list); | |
139 | ||
d56410e0 | 140 | #ifdef DEBUG |
1da177e4 LT |
141 | dump_urb(b->purb); |
142 | #endif | |
1bc3c9e1 | 143 | kfree(b->purb->transfer_buffer); |
1da177e4 LT |
144 | usb_free_urb(b->purb); |
145 | tmp = p->next; | |
146 | list_del (p); | |
147 | kfree (b); | |
148 | p = tmp; | |
149 | } | |
150 | ||
151 | return 0; | |
152 | } | |
153 | /*-------------------------------------------------------------------*/ | |
154 | static int dabusb_free_buffers (pdabusb_t s) | |
155 | { | |
156 | unsigned long flags; | |
157 | dbg("dabusb_free_buffers"); | |
158 | ||
159 | spin_lock_irqsave(&s->lock, flags); | |
160 | ||
161 | dabusb_free_queue (&s->free_buff_list); | |
162 | dabusb_free_queue (&s->rec_buff_list); | |
163 | ||
164 | spin_unlock_irqrestore(&s->lock, flags); | |
165 | ||
166 | s->got_mem = 0; | |
167 | return 0; | |
168 | } | |
169 | /*-------------------------------------------------------------------*/ | |
7d12e780 | 170 | static void dabusb_iso_complete (struct urb *purb) |
1da177e4 LT |
171 | { |
172 | pbuff_t b = purb->context; | |
173 | pdabusb_t s = b->s; | |
174 | int i; | |
175 | int len; | |
176 | int dst = 0; | |
177 | void *buf = purb->transfer_buffer; | |
178 | ||
179 | dbg("dabusb_iso_complete"); | |
180 | ||
181 | // process if URB was not killed | |
182 | if (purb->status != -ENOENT) { | |
183 | unsigned int pipe = usb_rcvisocpipe (purb->dev, _DABUSB_ISOPIPE); | |
184 | int pipesize = usb_maxpacket (purb->dev, pipe, usb_pipeout (pipe)); | |
185 | for (i = 0; i < purb->number_of_packets; i++) | |
186 | if (!purb->iso_frame_desc[i].status) { | |
187 | len = purb->iso_frame_desc[i].actual_length; | |
188 | if (len <= pipesize) { | |
189 | memcpy (buf + dst, buf + purb->iso_frame_desc[i].offset, len); | |
190 | dst += len; | |
191 | } | |
192 | else | |
be9ed511 MCC |
193 | dev_err(&purb->dev->dev, |
194 | "dabusb_iso_complete: invalid len %d\n", len); | |
1da177e4 LT |
195 | } |
196 | else | |
aa82661b | 197 | dev_warn(&purb->dev->dev, "dabusb_iso_complete: corrupted packet status: %d\n", purb->iso_frame_desc[i].status); |
1da177e4 | 198 | if (dst != purb->actual_length) |
be9ed511 MCC |
199 | dev_err(&purb->dev->dev, |
200 | "dst!=purb->actual_length:%d!=%d\n", | |
201 | dst, purb->actual_length); | |
1da177e4 LT |
202 | } |
203 | ||
204 | if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) { | |
205 | s->overruns++; | |
be9ed511 | 206 | dev_err(&purb->dev->dev, "overrun (%d)\n", s->overruns); |
1da177e4 LT |
207 | } |
208 | wake_up (&s->wait); | |
209 | } | |
210 | /*-------------------------------------------------------------------*/ | |
211 | static int dabusb_alloc_buffers (pdabusb_t s) | |
212 | { | |
6f289675 | 213 | int transfer_len = 0; |
1da177e4 LT |
214 | pbuff_t b; |
215 | unsigned int pipe = usb_rcvisocpipe (s->usbdev, _DABUSB_ISOPIPE); | |
216 | int pipesize = usb_maxpacket (s->usbdev, pipe, usb_pipeout (pipe)); | |
217 | int packets = _ISOPIPESIZE / pipesize; | |
218 | int transfer_buffer_length = packets * pipesize; | |
219 | int i; | |
220 | ||
221 | dbg("dabusb_alloc_buffers pipesize:%d packets:%d transfer_buffer_len:%d", | |
222 | pipesize, packets, transfer_buffer_length); | |
223 | ||
6f289675 | 224 | while (transfer_len < (s->total_buffer_size << 10)) { |
5cbded58 | 225 | b = kzalloc(sizeof (buff_t), GFP_KERNEL); |
1da177e4 | 226 | if (!b) { |
be9ed511 MCC |
227 | dev_err(&s->usbdev->dev, |
228 | "kzalloc(sizeof(buff_t))==NULL\n"); | |
1da177e4 LT |
229 | goto err; |
230 | } | |
1da177e4 LT |
231 | b->s = s; |
232 | b->purb = usb_alloc_urb(packets, GFP_KERNEL); | |
233 | if (!b->purb) { | |
be9ed511 | 234 | dev_err(&s->usbdev->dev, "usb_alloc_urb == NULL\n"); |
1da177e4 LT |
235 | kfree (b); |
236 | goto err; | |
237 | } | |
238 | ||
239 | b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL); | |
240 | if (!b->purb->transfer_buffer) { | |
241 | kfree (b->purb); | |
242 | kfree (b); | |
be9ed511 MCC |
243 | dev_err(&s->usbdev->dev, |
244 | "kmalloc(%d)==NULL\n", transfer_buffer_length); | |
1da177e4 LT |
245 | goto err; |
246 | } | |
247 | ||
248 | b->purb->transfer_buffer_length = transfer_buffer_length; | |
249 | b->purb->number_of_packets = packets; | |
250 | b->purb->complete = dabusb_iso_complete; | |
251 | b->purb->context = b; | |
252 | b->purb->dev = s->usbdev; | |
253 | b->purb->pipe = pipe; | |
254 | b->purb->transfer_flags = URB_ISO_ASAP; | |
255 | ||
256 | for (i = 0; i < packets; i++) { | |
257 | b->purb->iso_frame_desc[i].offset = i * pipesize; | |
258 | b->purb->iso_frame_desc[i].length = pipesize; | |
259 | } | |
260 | ||
6f289675 | 261 | transfer_len += transfer_buffer_length; |
1da177e4 LT |
262 | list_add_tail (&b->buff_list, &s->free_buff_list); |
263 | } | |
6f289675 | 264 | s->got_mem = transfer_len; |
1da177e4 LT |
265 | |
266 | return 0; | |
267 | ||
268 | err: | |
269 | dabusb_free_buffers (s); | |
270 | return -ENOMEM; | |
271 | } | |
272 | /*-------------------------------------------------------------------*/ | |
273 | static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb) | |
274 | { | |
275 | int ret; | |
276 | unsigned int pipe; | |
277 | int actual_length; | |
278 | ||
279 | dbg("dabusb_bulk"); | |
280 | ||
281 | if (!pb->pipe) | |
282 | pipe = usb_rcvbulkpipe (s->usbdev, 2); | |
283 | else | |
284 | pipe = usb_sndbulkpipe (s->usbdev, 2); | |
285 | ||
286 | ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100); | |
287 | if(ret<0) { | |
be9ed511 MCC |
288 | dev_err(&s->usbdev->dev, |
289 | "usb_bulk_msg failed(%d)\n", ret); | |
1da177e4 LT |
290 | |
291 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
be9ed511 | 292 | dev_err(&s->usbdev->dev, "set_interface failed\n"); |
1da177e4 LT |
293 | return -EINVAL; |
294 | } | |
295 | ||
296 | } | |
d56410e0 | 297 | |
1da177e4 | 298 | if( ret == -EPIPE ) { |
aa82661b | 299 | dev_warn(&s->usbdev->dev, "CLEAR_FEATURE request to remove STALL condition.\n"); |
1da177e4 | 300 | if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe))) |
be9ed511 | 301 | dev_err(&s->usbdev->dev, "request failed\n"); |
1da177e4 LT |
302 | } |
303 | ||
304 | pb->size = actual_length; | |
305 | return ret; | |
306 | } | |
307 | /* --------------------------------------------------------------------- */ | |
c4667746 DW |
308 | static int dabusb_writemem (pdabusb_t s, int pos, const unsigned char *data, |
309 | int len) | |
1da177e4 LT |
310 | { |
311 | int ret; | |
312 | unsigned char *transfer_buffer = kmalloc (len, GFP_KERNEL); | |
313 | ||
314 | if (!transfer_buffer) { | |
be9ed511 MCC |
315 | dev_err(&s->usbdev->dev, |
316 | "dabusb_writemem: kmalloc(%d) failed.\n", len); | |
1da177e4 LT |
317 | return -ENOMEM; |
318 | } | |
319 | ||
320 | memcpy (transfer_buffer, data, len); | |
321 | ||
322 | ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300); | |
323 | ||
324 | kfree (transfer_buffer); | |
325 | return ret; | |
326 | } | |
327 | /* --------------------------------------------------------------------- */ | |
328 | static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit) | |
329 | { | |
330 | dbg("dabusb_8051_reset: %d",reset_bit); | |
331 | return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1); | |
332 | } | |
333 | /* --------------------------------------------------------------------- */ | |
334 | static int dabusb_loadmem (pdabusb_t s, const char *fname) | |
335 | { | |
336 | int ret; | |
c4667746 | 337 | const struct ihex_binrec *rec; |
031002d7 | 338 | const struct firmware *uninitialized_var(fw); |
1da177e4 LT |
339 | |
340 | dbg("Enter dabusb_loadmem (internal)"); | |
d56410e0 | 341 | |
c4667746 DW |
342 | ret = request_ihex_firmware(&fw, "dabusb/firmware.fw", &s->usbdev->dev); |
343 | if (ret) { | |
be9ed511 MCC |
344 | dev_err(&s->usbdev->dev, |
345 | "Failed to load \"dabusb/firmware.fw\": %d\n", ret); | |
c4667746 DW |
346 | goto out; |
347 | } | |
1da177e4 | 348 | ret = dabusb_8051_reset (s, 1); |
1da177e4 | 349 | |
c4667746 DW |
350 | for (rec = (const struct ihex_binrec *)fw->data; rec; |
351 | rec = ihex_next_binrec(rec)) { | |
352 | dbg("dabusb_writemem: %04X %p %d)", be32_to_cpu(rec->addr), | |
353 | rec->data, be16_to_cpu(rec->len)); | |
1da177e4 | 354 | |
c4667746 DW |
355 | ret = dabusb_writemem(s, be32_to_cpu(rec->addr), rec->data, |
356 | be16_to_cpu(rec->len)); | |
1da177e4 | 357 | if (ret < 0) { |
be9ed511 MCC |
358 | dev_err(&s->usbdev->dev, |
359 | "dabusb_writemem failed (%d %04X %p %d)\n", | |
360 | ret, be32_to_cpu(rec->addr), | |
361 | rec->data, be16_to_cpu(rec->len)); | |
1da177e4 LT |
362 | break; |
363 | } | |
1da177e4 LT |
364 | } |
365 | ret = dabusb_8051_reset (s, 0); | |
c4667746 DW |
366 | release_firmware(fw); |
367 | out: | |
1da177e4 LT |
368 | dbg("dabusb_loadmem: exit"); |
369 | ||
370 | return ret; | |
371 | } | |
372 | /* --------------------------------------------------------------------- */ | |
373 | static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b) | |
374 | { | |
375 | b->size = 4; | |
376 | b->data[0] = 0x2a; | |
377 | b->data[1] = 0; | |
378 | b->data[2] = 0; | |
379 | b->data[3] = 0; | |
380 | ||
381 | dbg("dabusb_fpga_clear"); | |
382 | ||
383 | return dabusb_bulk (s, b); | |
384 | } | |
385 | /* --------------------------------------------------------------------- */ | |
386 | static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b) | |
387 | { | |
388 | b->size = 4; | |
389 | b->data[0] = 0x2c; | |
390 | b->data[1] = 0; | |
391 | b->data[2] = 0; | |
392 | b->data[3] = 0; | |
393 | ||
394 | dbg("dabusb_fpga_init"); | |
395 | ||
396 | return dabusb_bulk (s, b); | |
397 | } | |
398 | /* --------------------------------------------------------------------- */ | |
399 | static int dabusb_fpga_download (pdabusb_t s, const char *fname) | |
400 | { | |
401 | pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL); | |
c4667746 | 402 | const struct firmware *fw; |
1da177e4 LT |
403 | unsigned int blen, n; |
404 | int ret; | |
1da177e4 LT |
405 | |
406 | dbg("Enter dabusb_fpga_download (internal)"); | |
407 | ||
408 | if (!b) { | |
be9ed511 MCC |
409 | dev_err(&s->usbdev->dev, |
410 | "kmalloc(sizeof(bulk_transfer_t))==NULL\n"); | |
1da177e4 LT |
411 | return -ENOMEM; |
412 | } | |
413 | ||
c4667746 DW |
414 | ret = request_firmware(&fw, "dabusb/bitstream.bin", &s->usbdev->dev); |
415 | if (ret) { | |
be9ed511 MCC |
416 | dev_err(&s->usbdev->dev, |
417 | "Failed to load \"dabusb/bitstream.bin\": %d\n", ret); | |
02c0267a | 418 | kfree(b); |
c4667746 DW |
419 | return ret; |
420 | } | |
421 | ||
1da177e4 LT |
422 | b->pipe = 1; |
423 | ret = dabusb_fpga_clear (s, b); | |
424 | mdelay (10); | |
c4667746 | 425 | blen = fw->data[73] + (fw->data[72] << 8); |
1da177e4 LT |
426 | |
427 | dbg("Bitstream len: %i", blen); | |
428 | ||
429 | b->data[0] = 0x2b; | |
430 | b->data[1] = 0; | |
431 | b->data[2] = 0; | |
432 | b->data[3] = 60; | |
433 | ||
434 | for (n = 0; n <= blen + 60; n += 60) { | |
435 | // some cclks for startup | |
436 | b->size = 64; | |
c4667746 | 437 | memcpy (b->data + 4, fw->data + 74 + n, 60); |
1da177e4 LT |
438 | ret = dabusb_bulk (s, b); |
439 | if (ret < 0) { | |
be9ed511 | 440 | dev_err(&s->usbdev->dev, "dabusb_bulk failed.\n"); |
1da177e4 LT |
441 | break; |
442 | } | |
443 | mdelay (1); | |
444 | } | |
445 | ||
446 | ret = dabusb_fpga_init (s, b); | |
447 | kfree (b); | |
c4667746 | 448 | release_firmware(fw); |
1da177e4 LT |
449 | |
450 | dbg("exit dabusb_fpga_download"); | |
451 | ||
452 | return ret; | |
453 | } | |
454 | ||
455 | static int dabusb_stop (pdabusb_t s) | |
456 | { | |
457 | dbg("dabusb_stop"); | |
458 | ||
459 | s->state = _stopped; | |
460 | dabusb_cancel_queue (s, &s->rec_buff_list); | |
461 | ||
462 | dbg("pending_io: %d", s->pending_io.counter); | |
463 | ||
464 | s->pending_io.counter = 0; | |
465 | return 0; | |
466 | } | |
467 | ||
468 | static int dabusb_startrek (pdabusb_t s) | |
469 | { | |
470 | if (!s->got_mem && s->state != _started) { | |
471 | ||
472 | dbg("dabusb_startrek"); | |
473 | ||
474 | if (dabusb_alloc_buffers (s) < 0) | |
475 | return -ENOMEM; | |
476 | dabusb_stop (s); | |
477 | s->state = _started; | |
478 | s->readptr = 0; | |
479 | } | |
480 | ||
481 | if (!list_empty (&s->free_buff_list)) { | |
482 | pbuff_t end; | |
483 | int ret; | |
d56410e0 | 484 | |
1da177e4 LT |
485 | while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) { |
486 | ||
487 | dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list); | |
488 | ||
489 | end = list_entry (s->rec_buff_list.prev, buff_t, buff_list); | |
490 | ||
491 | ret = usb_submit_urb (end->purb, GFP_KERNEL); | |
492 | if (ret) { | |
be9ed511 MCC |
493 | dev_err(&s->usbdev->dev, |
494 | "usb_submit_urb returned:%d\n", ret); | |
1da177e4 | 495 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) |
be9ed511 MCC |
496 | dev_err(&s->usbdev->dev, |
497 | "startrek: dabusb_add_buf_tail failed\n"); | |
1da177e4 LT |
498 | break; |
499 | } | |
500 | else | |
501 | atomic_inc (&s->pending_io); | |
502 | } | |
503 | dbg("pending_io: %d",s->pending_io.counter); | |
504 | } | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos) | |
510 | { | |
511 | pdabusb_t s = (pdabusb_t) file->private_data; | |
512 | unsigned long flags; | |
513 | unsigned ret = 0; | |
514 | int rem; | |
515 | int cnt; | |
516 | pbuff_t b; | |
517 | struct urb *purb = NULL; | |
518 | ||
519 | dbg("dabusb_read"); | |
520 | ||
521 | if (*ppos) | |
522 | return -ESPIPE; | |
523 | ||
524 | if (s->remove_pending) | |
525 | return -EIO; | |
526 | ||
527 | ||
528 | if (!s->usbdev) | |
529 | return -EIO; | |
530 | ||
531 | while (count > 0) { | |
532 | dabusb_startrek (s); | |
533 | ||
534 | spin_lock_irqsave (&s->lock, flags); | |
535 | ||
536 | if (list_empty (&s->rec_buff_list)) { | |
537 | ||
538 | spin_unlock_irqrestore(&s->lock, flags); | |
539 | ||
be9ed511 MCC |
540 | dev_err(&s->usbdev->dev, |
541 | "error: rec_buf_list is empty\n"); | |
1da177e4 LT |
542 | goto err; |
543 | } | |
d56410e0 | 544 | |
1da177e4 LT |
545 | b = list_entry (s->rec_buff_list.next, buff_t, buff_list); |
546 | purb = b->purb; | |
547 | ||
548 | spin_unlock_irqrestore(&s->lock, flags); | |
549 | ||
550 | if (purb->status == -EINPROGRESS) { | |
551 | if (file->f_flags & O_NONBLOCK) // return nonblocking | |
552 | { | |
553 | if (!ret) | |
554 | ret = -EAGAIN; | |
555 | goto err; | |
556 | } | |
557 | ||
558 | interruptible_sleep_on (&s->wait); | |
559 | ||
560 | if (signal_pending (current)) { | |
561 | if (!ret) | |
562 | ret = -ERESTARTSYS; | |
563 | goto err; | |
564 | } | |
565 | ||
566 | spin_lock_irqsave (&s->lock, flags); | |
567 | ||
568 | if (list_empty (&s->rec_buff_list)) { | |
569 | spin_unlock_irqrestore(&s->lock, flags); | |
be9ed511 MCC |
570 | dev_err(&s->usbdev->dev, |
571 | "error: still no buffer available.\n"); | |
1da177e4 LT |
572 | goto err; |
573 | } | |
574 | spin_unlock_irqrestore(&s->lock, flags); | |
575 | s->readptr = 0; | |
576 | } | |
577 | if (s->remove_pending) { | |
578 | ret = -EIO; | |
579 | goto err; | |
580 | } | |
581 | ||
582 | rem = purb->actual_length - s->readptr; // set remaining bytes to copy | |
583 | ||
584 | if (count >= rem) | |
585 | cnt = rem; | |
586 | else | |
587 | cnt = count; | |
588 | ||
589 | dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt); | |
590 | ||
591 | if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) { | |
be9ed511 | 592 | dev_err(&s->usbdev->dev, "read: copy_to_user failed\n"); |
1da177e4 LT |
593 | if (!ret) |
594 | ret = -EFAULT; | |
595 | goto err; | |
596 | } | |
597 | ||
598 | s->readptr += cnt; | |
599 | count -= cnt; | |
600 | buf += cnt; | |
601 | ret += cnt; | |
602 | ||
603 | if (s->readptr == purb->actual_length) { | |
604 | // finished, take next buffer | |
605 | if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list)) | |
be9ed511 MCC |
606 | dev_err(&s->usbdev->dev, |
607 | "read: dabusb_add_buf_tail failed\n"); | |
1da177e4 LT |
608 | s->readptr = 0; |
609 | } | |
610 | } | |
4186ecf8 | 611 | err: //mutex_unlock(&s->mutex); |
1da177e4 LT |
612 | return ret; |
613 | } | |
614 | ||
615 | static int dabusb_open (struct inode *inode, struct file *file) | |
616 | { | |
617 | int devnum = iminor(inode); | |
618 | pdabusb_t s; | |
86266452 | 619 | int r; |
1da177e4 LT |
620 | |
621 | if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB)) | |
622 | return -EIO; | |
623 | ||
86266452 | 624 | lock_kernel(); |
1da177e4 LT |
625 | s = &dabusb[devnum - DABUSB_MINOR]; |
626 | ||
627 | dbg("dabusb_open"); | |
4186ecf8 | 628 | mutex_lock(&s->mutex); |
1da177e4 LT |
629 | |
630 | while (!s->usbdev || s->opened) { | |
4186ecf8 | 631 | mutex_unlock(&s->mutex); |
1da177e4 LT |
632 | |
633 | if (file->f_flags & O_NONBLOCK) { | |
634 | return -EBUSY; | |
635 | } | |
636 | msleep_interruptible(500); | |
637 | ||
638 | if (signal_pending (current)) { | |
86266452 | 639 | unlock_kernel(); |
1da177e4 LT |
640 | return -EAGAIN; |
641 | } | |
4186ecf8 | 642 | mutex_lock(&s->mutex); |
1da177e4 LT |
643 | } |
644 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) { | |
4186ecf8 | 645 | mutex_unlock(&s->mutex); |
be9ed511 | 646 | dev_err(&s->usbdev->dev, "set_interface failed\n"); |
86266452 | 647 | unlock_kernel(); |
1da177e4 LT |
648 | return -EINVAL; |
649 | } | |
650 | s->opened = 1; | |
4186ecf8 | 651 | mutex_unlock(&s->mutex); |
1da177e4 LT |
652 | |
653 | file->f_pos = 0; | |
654 | file->private_data = s; | |
655 | ||
86266452 ON |
656 | r = nonseekable_open(inode, file); |
657 | unlock_kernel(); | |
658 | return r; | |
1da177e4 LT |
659 | } |
660 | ||
661 | static int dabusb_release (struct inode *inode, struct file *file) | |
662 | { | |
663 | pdabusb_t s = (pdabusb_t) file->private_data; | |
664 | ||
665 | dbg("dabusb_release"); | |
666 | ||
4186ecf8 | 667 | mutex_lock(&s->mutex); |
1da177e4 LT |
668 | dabusb_stop (s); |
669 | dabusb_free_buffers (s); | |
4186ecf8 | 670 | mutex_unlock(&s->mutex); |
1da177e4 LT |
671 | |
672 | if (!s->remove_pending) { | |
673 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) | |
be9ed511 | 674 | dev_err(&s->usbdev->dev, "set_interface failed\n"); |
1da177e4 LT |
675 | } |
676 | else | |
677 | wake_up (&s->remove_ok); | |
678 | ||
679 | s->opened = 0; | |
680 | return 0; | |
681 | } | |
682 | ||
5ed2b641 | 683 | static long dabusb_ioctl (struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
684 | { |
685 | pdabusb_t s = (pdabusb_t) file->private_data; | |
686 | pbulk_transfer_t pbulk; | |
687 | int ret = 0; | |
688 | int version = DABUSB_VERSION; | |
689 | ||
690 | dbg("dabusb_ioctl"); | |
691 | ||
3fd8ab30 | 692 | lock_kernel(); |
5ed2b641 SG |
693 | if (s->remove_pending) { |
694 | unlock_kernel(); | |
1da177e4 | 695 | return -EIO; |
5ed2b641 | 696 | } |
1da177e4 | 697 | |
4186ecf8 | 698 | mutex_lock(&s->mutex); |
1da177e4 LT |
699 | |
700 | if (!s->usbdev) { | |
4186ecf8 | 701 | mutex_unlock(&s->mutex); |
5ed2b641 | 702 | unlock_kernel(); |
1da177e4 LT |
703 | return -EIO; |
704 | } | |
705 | ||
706 | switch (cmd) { | |
707 | ||
708 | case IOCTL_DAB_BULK: | |
c6cfe055 JL |
709 | pbulk = memdup_user((void __user *)arg, |
710 | sizeof(bulk_transfer_t)); | |
1da177e4 | 711 | |
c6cfe055 JL |
712 | if (IS_ERR(pbulk)) { |
713 | ret = PTR_ERR(pbulk); | |
1da177e4 LT |
714 | break; |
715 | } | |
716 | ||
717 | ret=dabusb_bulk (s, pbulk); | |
718 | if(ret==0) | |
719 | if (copy_to_user((void __user *)arg, pbulk, | |
720 | sizeof(bulk_transfer_t))) | |
721 | ret = -EFAULT; | |
722 | kfree (pbulk); | |
723 | break; | |
724 | ||
725 | case IOCTL_DAB_OVERRUNS: | |
726 | ret = put_user (s->overruns, (unsigned int __user *) arg); | |
727 | break; | |
728 | ||
729 | case IOCTL_DAB_VERSION: | |
730 | ret = put_user (version, (unsigned int __user *) arg); | |
731 | break; | |
732 | ||
733 | default: | |
734 | ret = -ENOIOCTLCMD; | |
735 | break; | |
736 | } | |
4186ecf8 | 737 | mutex_unlock(&s->mutex); |
5ed2b641 | 738 | unlock_kernel(); |
1da177e4 LT |
739 | return ret; |
740 | } | |
741 | ||
fa027c2a | 742 | static const struct file_operations dabusb_fops = |
1da177e4 LT |
743 | { |
744 | .owner = THIS_MODULE, | |
745 | .llseek = no_llseek, | |
746 | .read = dabusb_read, | |
5ed2b641 | 747 | .unlocked_ioctl = dabusb_ioctl, |
1da177e4 LT |
748 | .open = dabusb_open, |
749 | .release = dabusb_release, | |
750 | }; | |
751 | ||
388dba30 | 752 | static char *dabusb_devnode(struct device *dev, mode_t *mode) |
f7a386c5 KS |
753 | { |
754 | return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev)); | |
755 | } | |
756 | ||
1da177e4 | 757 | static struct usb_class_driver dabusb_class = { |
d6e5bcf4 | 758 | .name = "dabusb%d", |
388dba30 | 759 | .devnode = dabusb_devnode, |
1da177e4 | 760 | .fops = &dabusb_fops, |
1da177e4 LT |
761 | .minor_base = DABUSB_MINOR, |
762 | }; | |
763 | ||
764 | ||
765 | /* --------------------------------------------------------------------- */ | |
766 | static int dabusb_probe (struct usb_interface *intf, | |
767 | const struct usb_device_id *id) | |
768 | { | |
769 | struct usb_device *usbdev = interface_to_usbdev(intf); | |
770 | int retval; | |
771 | pdabusb_t s; | |
772 | ||
773 | dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d", | |
774 | le16_to_cpu(usbdev->descriptor.idVendor), | |
775 | le16_to_cpu(usbdev->descriptor.idProduct), | |
776 | intf->altsetting->desc.bInterfaceNumber); | |
777 | ||
778 | /* We don't handle multiple configurations */ | |
779 | if (usbdev->descriptor.bNumConfigurations != 1) | |
780 | return -ENODEV; | |
781 | ||
782 | if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF && | |
783 | le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999) | |
784 | return -ENODEV; | |
785 | ||
786 | ||
787 | ||
788 | s = &dabusb[intf->minor]; | |
789 | ||
4186ecf8 | 790 | mutex_lock(&s->mutex); |
1da177e4 LT |
791 | s->remove_pending = 0; |
792 | s->usbdev = usbdev; | |
793 | s->devnum = intf->minor; | |
794 | ||
795 | if (usb_reset_configuration (usbdev) < 0) { | |
be9ed511 | 796 | dev_err(&intf->dev, "reset_configuration failed\n"); |
1da177e4 LT |
797 | goto reject; |
798 | } | |
799 | if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) { | |
800 | dabusb_loadmem (s, NULL); | |
801 | goto reject; | |
802 | } | |
803 | else { | |
804 | dabusb_fpga_download (s, NULL); | |
805 | ||
806 | if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) { | |
be9ed511 | 807 | dev_err(&intf->dev, "set_interface failed\n"); |
1da177e4 LT |
808 | goto reject; |
809 | } | |
810 | } | |
811 | dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber); | |
812 | usb_set_intfdata (intf, s); | |
4186ecf8 | 813 | mutex_unlock(&s->mutex); |
1da177e4 LT |
814 | |
815 | retval = usb_register_dev(intf, &dabusb_class); | |
816 | if (retval) { | |
817 | usb_set_intfdata (intf, NULL); | |
818 | return -ENOMEM; | |
819 | } | |
820 | ||
821 | return 0; | |
822 | ||
823 | reject: | |
4186ecf8 | 824 | mutex_unlock(&s->mutex); |
1da177e4 LT |
825 | s->usbdev = NULL; |
826 | return -ENODEV; | |
827 | } | |
828 | ||
829 | static void dabusb_disconnect (struct usb_interface *intf) | |
830 | { | |
831 | wait_queue_t __wait; | |
832 | pdabusb_t s = usb_get_intfdata (intf); | |
833 | ||
834 | dbg("dabusb_disconnect"); | |
d56410e0 | 835 | |
1da177e4 | 836 | init_waitqueue_entry(&__wait, current); |
d56410e0 | 837 | |
1da177e4 LT |
838 | usb_set_intfdata (intf, NULL); |
839 | if (s) { | |
840 | usb_deregister_dev (intf, &dabusb_class); | |
841 | s->remove_pending = 1; | |
842 | wake_up (&s->wait); | |
843 | add_wait_queue(&s->remove_ok, &__wait); | |
844 | set_current_state(TASK_UNINTERRUPTIBLE); | |
845 | if (s->state == _started) | |
846 | schedule(); | |
847 | current->state = TASK_RUNNING; | |
848 | remove_wait_queue(&s->remove_ok, &__wait); | |
d56410e0 | 849 | |
1da177e4 LT |
850 | s->usbdev = NULL; |
851 | s->overruns = 0; | |
852 | } | |
853 | } | |
854 | ||
855 | static struct usb_device_id dabusb_ids [] = { | |
856 | // { USB_DEVICE(0x0547, 0x2131) }, /* An2131 chip, no boot ROM */ | |
857 | { USB_DEVICE(0x0547, 0x9999) }, | |
858 | { } /* Terminating entry */ | |
859 | }; | |
860 | ||
861 | MODULE_DEVICE_TABLE (usb, dabusb_ids); | |
862 | ||
863 | static struct usb_driver dabusb_driver = { | |
1da177e4 LT |
864 | .name = "dabusb", |
865 | .probe = dabusb_probe, | |
866 | .disconnect = dabusb_disconnect, | |
867 | .id_table = dabusb_ids, | |
868 | }; | |
869 | ||
870 | /* --------------------------------------------------------------------- */ | |
871 | ||
872 | static int __init dabusb_init (void) | |
873 | { | |
874 | int retval; | |
875 | unsigned u; | |
876 | ||
877 | /* initialize struct */ | |
878 | for (u = 0; u < NRDABUSB; u++) { | |
879 | pdabusb_t s = &dabusb[u]; | |
880 | memset (s, 0, sizeof (dabusb_t)); | |
4186ecf8 | 881 | mutex_init (&s->mutex); |
1da177e4 LT |
882 | s->usbdev = NULL; |
883 | s->total_buffer_size = buffers; | |
884 | init_waitqueue_head (&s->wait); | |
885 | init_waitqueue_head (&s->remove_ok); | |
886 | spin_lock_init (&s->lock); | |
887 | INIT_LIST_HEAD (&s->free_buff_list); | |
888 | INIT_LIST_HEAD (&s->rec_buff_list); | |
889 | } | |
890 | ||
891 | /* register misc device */ | |
892 | retval = usb_register(&dabusb_driver); | |
893 | if (retval) | |
894 | goto out; | |
895 | ||
896 | dbg("dabusb_init: driver registered"); | |
897 | ||
a482f327 GKH |
898 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
899 | DRIVER_DESC "\n"); | |
1da177e4 LT |
900 | |
901 | out: | |
902 | return retval; | |
903 | } | |
904 | ||
905 | static void __exit dabusb_cleanup (void) | |
906 | { | |
907 | dbg("dabusb_cleanup"); | |
908 | ||
909 | usb_deregister (&dabusb_driver); | |
910 | } | |
911 | ||
912 | /* --------------------------------------------------------------------- */ | |
913 | ||
914 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
915 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
916 | MODULE_LICENSE("GPL"); | |
0633255c BH |
917 | MODULE_FIRMWARE("dabusb/firmware.fw"); |
918 | MODULE_FIRMWARE("dabusb/bitstream.bin"); | |
1da177e4 LT |
919 | |
920 | module_param(buffers, int, 0); | |
921 | MODULE_PARM_DESC (buffers, "Number of buffers (default=256)"); | |
922 | ||
923 | module_init (dabusb_init); | |
924 | module_exit (dabusb_cleanup); | |
925 | ||
926 | /* --------------------------------------------------------------------- */ |