Commit | Line | Data |
---|---|---|
705ececd | 1 | /* |
e1a164d7 | 2 | * Line6 Linux USB driver - 0.9.1beta |
705ececd | 3 | * |
1027f476 | 4 | * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) |
705ececd MG |
5 | * |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation, version 2. | |
9 | * | |
10 | */ | |
11 | ||
140e28b8 | 12 | #include <linux/slab.h> |
705ececd MG |
13 | #include <sound/core.h> |
14 | #include <sound/pcm.h> | |
15 | #include <sound/pcm_params.h> | |
16 | ||
17 | #include "audio.h" | |
1027f476 MG |
18 | #include "capture.h" |
19 | #include "driver.h" | |
705ececd MG |
20 | #include "pcm.h" |
21 | #include "pod.h" | |
1027f476 | 22 | |
705ececd MG |
23 | /* |
24 | Find a free URB and submit it. | |
25 | */ | |
1027f476 | 26 | static int submit_audio_in_urb(struct snd_line6_pcm *line6pcm) |
705ececd | 27 | { |
1027f476 | 28 | int index; |
705ececd | 29 | unsigned long flags; |
705ececd | 30 | int i, urb_size; |
e1a164d7 | 31 | int ret; |
705ececd MG |
32 | struct urb *urb_in; |
33 | ||
34 | spin_lock_irqsave(&line6pcm->lock_audio_in, flags); | |
e0645d63 SB |
35 | index = |
36 | find_first_zero_bit(&line6pcm->active_urb_in, LINE6_ISO_BUFFERS); | |
705ececd | 37 | |
1027f476 | 38 | if (index < 0 || index >= LINE6_ISO_BUFFERS) { |
705ececd | 39 | spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags); |
1027f476 | 40 | dev_err(line6pcm->line6->ifcdev, "no free URB found\n"); |
705ececd MG |
41 | return -EINVAL; |
42 | } | |
43 | ||
44 | urb_in = line6pcm->urb_audio_in[index]; | |
45 | urb_size = 0; | |
46 | ||
6efc5667 | 47 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
e0645d63 SB |
48 | struct usb_iso_packet_descriptor *fin = |
49 | &urb_in->iso_frame_desc[i]; | |
705ececd MG |
50 | fin->offset = urb_size; |
51 | fin->length = line6pcm->max_packet_size; | |
52 | urb_size += line6pcm->max_packet_size; | |
53 | } | |
54 | ||
e0645d63 SB |
55 | urb_in->transfer_buffer = |
56 | line6pcm->buffer_in + | |
57 | index * LINE6_ISO_PACKETS * line6pcm->max_packet_size; | |
705ececd | 58 | urb_in->transfer_buffer_length = urb_size; |
1027f476 | 59 | urb_in->context = line6pcm; |
705ececd | 60 | |
e1a164d7 MG |
61 | ret = usb_submit_urb(urb_in, GFP_ATOMIC); |
62 | ||
63 | if (ret == 0) | |
705ececd MG |
64 | set_bit(index, &line6pcm->active_urb_in); |
65 | else | |
1027f476 | 66 | dev_err(line6pcm->line6->ifcdev, |
e1a164d7 | 67 | "URB in #%d submission failed (%d)\n", index, ret); |
705ececd MG |
68 | |
69 | spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags); | |
70 | return 0; | |
71 | } | |
72 | ||
73 | /* | |
74 | Submit all currently available capture URBs. | |
75 | */ | |
1027f476 | 76 | int line6_submit_audio_in_all_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
77 | { |
78 | int ret, i; | |
79 | ||
6efc5667 | 80 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
1027f476 | 81 | ret = submit_audio_in_urb(line6pcm); |
6efc5667 | 82 | if (ret < 0) |
705ececd | 83 | return ret; |
6efc5667 | 84 | } |
705ececd MG |
85 | |
86 | return 0; | |
87 | } | |
88 | ||
89 | /* | |
90 | Unlink all currently active capture URBs. | |
91 | */ | |
1027f476 | 92 | void line6_unlink_audio_in_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
93 | { |
94 | unsigned int i; | |
95 | ||
6efc5667 GKH |
96 | for (i = LINE6_ISO_BUFFERS; i--;) { |
97 | if (test_bit(i, &line6pcm->active_urb_in)) { | |
98 | if (!test_and_set_bit(i, &line6pcm->unlink_urb_in)) { | |
705ececd | 99 | struct urb *u = line6pcm->urb_audio_in[i]; |
705ececd MG |
100 | usb_unlink_urb(u); |
101 | } | |
102 | } | |
103 | } | |
104 | } | |
105 | ||
106 | /* | |
6efc5667 GKH |
107 | Wait until unlinking of all currently active capture URBs has been |
108 | finished. | |
705ececd | 109 | */ |
0ca54888 | 110 | void line6_wait_clear_audio_in_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
111 | { |
112 | int timeout = HZ; | |
113 | unsigned int i; | |
114 | int alive; | |
115 | ||
116 | do { | |
117 | alive = 0; | |
118 | for (i = LINE6_ISO_BUFFERS; i--;) { | |
119 | if (test_bit(i, &line6pcm->active_urb_in)) | |
120 | alive++; | |
121 | } | |
6efc5667 | 122 | if (!alive) |
705ececd MG |
123 | break; |
124 | set_current_state(TASK_UNINTERRUPTIBLE); | |
125 | schedule_timeout(1); | |
126 | } while (--timeout > 0); | |
127 | if (alive) | |
128 | snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive); | |
705ececd MG |
129 | } |
130 | ||
131 | /* | |
132 | Unlink all currently active capture URBs, and wait for finishing. | |
133 | */ | |
1027f476 | 134 | void line6_unlink_wait_clear_audio_in_urbs(struct snd_line6_pcm *line6pcm) |
705ececd | 135 | { |
1027f476 | 136 | line6_unlink_audio_in_urbs(line6pcm); |
0ca54888 | 137 | line6_wait_clear_audio_in_urbs(line6pcm); |
705ececd MG |
138 | } |
139 | ||
140 | /* | |
1027f476 MG |
141 | Copy data into ALSA capture buffer. |
142 | */ | |
143 | void line6_capture_copy(struct snd_line6_pcm *line6pcm, char *fbuf, int fsize) | |
144 | { | |
145 | struct snd_pcm_substream *substream = | |
146 | get_substream(line6pcm, SNDRV_PCM_STREAM_CAPTURE); | |
147 | struct snd_pcm_runtime *runtime = substream->runtime; | |
148 | const int bytes_per_frame = line6pcm->properties->bytes_per_frame; | |
149 | int frames = fsize / bytes_per_frame; | |
150 | ||
597a1e7c | 151 | if (runtime == NULL) |
c7fcf255 MG |
152 | return; |
153 | ||
1027f476 MG |
154 | if (line6pcm->pos_in_done + frames > runtime->buffer_size) { |
155 | /* | |
e1a164d7 MG |
156 | The transferred area goes over buffer boundary, |
157 | copy two separate chunks. | |
158 | */ | |
1027f476 MG |
159 | int len; |
160 | len = runtime->buffer_size - line6pcm->pos_in_done; | |
161 | ||
162 | if (len > 0) { | |
163 | memcpy(runtime->dma_area + | |
164 | line6pcm->pos_in_done * bytes_per_frame, fbuf, | |
165 | len * bytes_per_frame); | |
166 | memcpy(runtime->dma_area, fbuf + len * bytes_per_frame, | |
167 | (frames - len) * bytes_per_frame); | |
027360c5 GKH |
168 | } else { |
169 | /* this is somewhat paranoid */ | |
170 | dev_err(line6pcm->line6->ifcdev, | |
171 | "driver bug: len = %d\n", len); | |
172 | } | |
1027f476 MG |
173 | } else { |
174 | /* copy single chunk */ | |
175 | memcpy(runtime->dma_area + | |
176 | line6pcm->pos_in_done * bytes_per_frame, fbuf, fsize); | |
177 | } | |
178 | ||
027360c5 GKH |
179 | line6pcm->pos_in_done += frames; |
180 | if (line6pcm->pos_in_done >= runtime->buffer_size) | |
1027f476 MG |
181 | line6pcm->pos_in_done -= runtime->buffer_size; |
182 | } | |
183 | ||
184 | void line6_capture_check_period(struct snd_line6_pcm *line6pcm, int length) | |
185 | { | |
186 | struct snd_pcm_substream *substream = | |
187 | get_substream(line6pcm, SNDRV_PCM_STREAM_CAPTURE); | |
188 | ||
027360c5 GKH |
189 | line6pcm->bytes_in += length; |
190 | if (line6pcm->bytes_in >= line6pcm->period_in) { | |
1027f476 MG |
191 | line6pcm->bytes_in %= line6pcm->period_in; |
192 | snd_pcm_period_elapsed(substream); | |
193 | } | |
194 | } | |
195 | ||
6b02a17e MG |
196 | void line6_free_capture_buffer(struct snd_line6_pcm *line6pcm) |
197 | { | |
198 | kfree(line6pcm->buffer_in); | |
199 | line6pcm->buffer_in = NULL; | |
200 | } | |
201 | ||
1027f476 | 202 | /* |
027360c5 GKH |
203 | * Callback for completed capture URB. |
204 | */ | |
0c7ab158 | 205 | static void audio_in_callback(struct urb *urb) |
705ececd MG |
206 | { |
207 | int i, index, length = 0, shutdown = 0; | |
705ececd MG |
208 | unsigned long flags; |
209 | ||
1027f476 MG |
210 | struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context; |
211 | ||
212 | line6pcm->last_frame_in = urb->start_frame; | |
705ececd MG |
213 | |
214 | /* find index of URB */ | |
6efc5667 GKH |
215 | for (index = 0; index < LINE6_ISO_BUFFERS; ++index) |
216 | if (urb == line6pcm->urb_audio_in[index]) | |
705ececd MG |
217 | break; |
218 | ||
1027f476 | 219 | #ifdef CONFIG_LINE6_USB_DUMP_PCM |
6efc5667 | 220 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
e0645d63 SB |
221 | struct usb_iso_packet_descriptor *fout = |
222 | &urb->iso_frame_desc[i]; | |
223 | line6_write_hexdump(line6pcm->line6, 'C', | |
224 | urb->transfer_buffer + fout->offset, | |
225 | fout->length); | |
705ececd MG |
226 | } |
227 | #endif | |
228 | ||
229 | spin_lock_irqsave(&line6pcm->lock_audio_in, flags); | |
230 | ||
6efc5667 | 231 | for (i = 0; i < LINE6_ISO_PACKETS; ++i) { |
705ececd MG |
232 | char *fbuf; |
233 | int fsize; | |
234 | struct usb_iso_packet_descriptor *fin = &urb->iso_frame_desc[i]; | |
235 | ||
e1a164d7 | 236 | if (fin->status == -EXDEV) { |
705ececd MG |
237 | shutdown = 1; |
238 | break; | |
239 | } | |
240 | ||
241 | fbuf = urb->transfer_buffer + fin->offset; | |
242 | fsize = fin->actual_length; | |
1027f476 MG |
243 | |
244 | if (fsize > line6pcm->max_packet_size) { | |
245 | dev_err(line6pcm->line6->ifcdev, | |
246 | "driver and/or device bug: packet too large (%d > %d)\n", | |
247 | fsize, line6pcm->max_packet_size); | |
248 | } | |
249 | ||
705ececd MG |
250 | length += fsize; |
251 | ||
1027f476 | 252 | /* the following assumes LINE6_ISO_PACKETS == 1: */ |
1027f476 | 253 | line6pcm->prev_fbuf = fbuf; |
1027f476 | 254 | line6pcm->prev_fsize = fsize; |
705ececd | 255 | |
1027f476 | 256 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
0ca54888 | 257 | if (!(line6pcm->flags & LINE6_BITS_PCM_IMPULSE)) |
1027f476 | 258 | #endif |
a71cac2a SH |
259 | if (test_bit(LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM, |
260 | &line6pcm->flags) && (fsize > 0)) | |
1027f476 | 261 | line6_capture_copy(line6pcm, fbuf, fsize); |
705ececd MG |
262 | } |
263 | ||
264 | clear_bit(index, &line6pcm->active_urb_in); | |
265 | ||
1027f476 | 266 | if (test_and_clear_bit(index, &line6pcm->unlink_urb_in)) |
705ececd MG |
267 | shutdown = 1; |
268 | ||
269 | spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags); | |
270 | ||
6efc5667 | 271 | if (!shutdown) { |
1027f476 | 272 | submit_audio_in_urb(line6pcm); |
705ececd | 273 | |
e1a164d7 | 274 | #ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE |
0ca54888 | 275 | if (!(line6pcm->flags & LINE6_BITS_PCM_IMPULSE)) |
e1a164d7 | 276 | #endif |
a71cac2a SH |
277 | if (test_bit(LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM, |
278 | &line6pcm->flags)) | |
e1a164d7 | 279 | line6_capture_check_period(line6pcm, length); |
705ececd MG |
280 | } |
281 | } | |
282 | ||
283 | /* open capture callback */ | |
284 | static int snd_line6_capture_open(struct snd_pcm_substream *substream) | |
285 | { | |
286 | int err; | |
287 | struct snd_pcm_runtime *runtime = substream->runtime; | |
288 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
289 | ||
6efc5667 GKH |
290 | err = snd_pcm_hw_constraint_ratdens(runtime, 0, |
291 | SNDRV_PCM_HW_PARAM_RATE, | |
e1a164d7 MG |
292 | (&line6pcm-> |
293 | properties->snd_line6_rates)); | |
6efc5667 | 294 | if (err < 0) |
705ececd MG |
295 | return err; |
296 | ||
297 | runtime->hw = line6pcm->properties->snd_line6_capture_hw; | |
298 | return 0; | |
299 | } | |
300 | ||
301 | /* close capture callback */ | |
302 | static int snd_line6_capture_close(struct snd_pcm_substream *substream) | |
303 | { | |
304 | return 0; | |
305 | } | |
306 | ||
307 | /* hw_params capture callback */ | |
6efc5667 GKH |
308 | static int snd_line6_capture_hw_params(struct snd_pcm_substream *substream, |
309 | struct snd_pcm_hw_params *hw_params) | |
705ececd MG |
310 | { |
311 | int ret; | |
312 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
313 | ||
314 | /* -- Florian Demski [FD] */ | |
315 | /* don't ask me why, but this fixes the bug on my machine */ | |
6efc5667 GKH |
316 | if (line6pcm == NULL) { |
317 | if (substream->pcm == NULL) | |
705ececd | 318 | return -ENOMEM; |
6efc5667 | 319 | if (substream->pcm->private_data == NULL) |
705ececd MG |
320 | return -ENOMEM; |
321 | substream->private_data = substream->pcm->private_data; | |
6efc5667 | 322 | line6pcm = snd_pcm_substream_chip(substream); |
705ececd MG |
323 | } |
324 | /* -- [FD] end */ | |
325 | ||
0ca54888 | 326 | ret = line6_pcm_acquire(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER); |
140e28b8 | 327 | |
0ca54888 MG |
328 | if (ret < 0) |
329 | return ret; | |
140e28b8 | 330 | |
6efc5667 GKH |
331 | ret = snd_pcm_lib_malloc_pages(substream, |
332 | params_buffer_bytes(hw_params)); | |
0ca54888 MG |
333 | if (ret < 0) { |
334 | line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER); | |
705ececd | 335 | return ret; |
0ca54888 | 336 | } |
705ececd MG |
337 | |
338 | line6pcm->period_in = params_period_bytes(hw_params); | |
705ececd MG |
339 | return 0; |
340 | } | |
341 | ||
342 | /* hw_free capture callback */ | |
343 | static int snd_line6_capture_hw_free(struct snd_pcm_substream *substream) | |
344 | { | |
140e28b8 | 345 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); |
0ca54888 | 346 | line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER); |
705ececd MG |
347 | return snd_pcm_lib_free_pages(substream); |
348 | } | |
349 | ||
350 | /* trigger callback */ | |
1027f476 | 351 | int snd_line6_capture_trigger(struct snd_line6_pcm *line6pcm, int cmd) |
705ececd | 352 | { |
705ececd | 353 | int err; |
705ececd | 354 | |
6efc5667 | 355 | switch (cmd) { |
705ececd | 356 | case SNDRV_PCM_TRIGGER_START: |
1027f476 MG |
357 | #ifdef CONFIG_PM |
358 | case SNDRV_PCM_TRIGGER_RESUME: | |
359 | #endif | |
a71cac2a SH |
360 | err = line6_pcm_acquire(line6pcm, |
361 | LINE6_BIT_PCM_ALSA_CAPTURE_STREAM); | |
705ececd | 362 | |
1027f476 MG |
363 | if (err < 0) |
364 | return err; | |
705ececd MG |
365 | |
366 | break; | |
367 | ||
368 | case SNDRV_PCM_TRIGGER_STOP: | |
1027f476 MG |
369 | #ifdef CONFIG_PM |
370 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
371 | #endif | |
a71cac2a SH |
372 | err = line6_pcm_release(line6pcm, |
373 | LINE6_BIT_PCM_ALSA_CAPTURE_STREAM); | |
1027f476 MG |
374 | |
375 | if (err < 0) | |
376 | return err; | |
705ececd MG |
377 | |
378 | break; | |
379 | ||
380 | default: | |
381 | return -EINVAL; | |
382 | } | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | /* capture pointer callback */ | |
388 | static snd_pcm_uframes_t | |
389 | snd_line6_capture_pointer(struct snd_pcm_substream *substream) | |
390 | { | |
391 | struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream); | |
392 | return line6pcm->pos_in_done; | |
393 | } | |
394 | ||
395 | /* capture operators */ | |
396 | struct snd_pcm_ops snd_line6_capture_ops = { | |
e1a164d7 MG |
397 | .open = snd_line6_capture_open, |
398 | .close = snd_line6_capture_close, | |
399 | .ioctl = snd_pcm_lib_ioctl, | |
400 | .hw_params = snd_line6_capture_hw_params, | |
401 | .hw_free = snd_line6_capture_hw_free, | |
402 | .prepare = snd_line6_prepare, | |
403 | .trigger = snd_line6_trigger, | |
404 | .pointer = snd_line6_capture_pointer, | |
705ececd MG |
405 | }; |
406 | ||
1027f476 | 407 | int line6_create_audio_in_urbs(struct snd_line6_pcm *line6pcm) |
705ececd MG |
408 | { |
409 | int i; | |
410 | ||
411 | /* create audio URBs and fill in constant values: */ | |
6efc5667 | 412 | for (i = 0; i < LINE6_ISO_BUFFERS; ++i) { |
705ececd MG |
413 | struct urb *urb; |
414 | ||
415 | /* URB for audio in: */ | |
e0645d63 SB |
416 | urb = line6pcm->urb_audio_in[i] = |
417 | usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL); | |
705ececd | 418 | |
6efc5667 | 419 | if (urb == NULL) { |
705ececd MG |
420 | dev_err(line6pcm->line6->ifcdev, "Out of memory\n"); |
421 | return -ENOMEM; | |
422 | } | |
423 | ||
424 | urb->dev = line6pcm->line6->usbdev; | |
e0645d63 SB |
425 | urb->pipe = |
426 | usb_rcvisocpipe(line6pcm->line6->usbdev, | |
e1a164d7 MG |
427 | line6pcm->ep_audio_read & |
428 | USB_ENDPOINT_NUMBER_MASK); | |
705ececd MG |
429 | urb->transfer_flags = URB_ISO_ASAP; |
430 | urb->start_frame = -1; | |
431 | urb->number_of_packets = LINE6_ISO_PACKETS; | |
432 | urb->interval = LINE6_ISO_INTERVAL; | |
433 | urb->error_count = 0; | |
434 | urb->complete = audio_in_callback; | |
435 | } | |
436 | ||
437 | return 0; | |
438 | } |