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12#include <linux/slab.h>
13#include <sound/core.h>
14#include <sound/pcm.h>
15#include <sound/pcm_params.h>
16
17#include "audio.h"
18#include "capture.h"
19#include "driver.h"
20#include "pcm.h"
21#include "pod.h"
22
23
24
25
26static int submit_audio_in_urb(struct snd_line6_pcm *line6pcm)
27{
28 int index;
29 unsigned long flags;
30 int i, urb_size;
31 int ret;
32 struct urb *urb_in;
33
34 spin_lock_irqsave(&line6pcm->lock_audio_in, flags);
35 index =
36 find_first_zero_bit(&line6pcm->active_urb_in, LINE6_ISO_BUFFERS);
37
38 if (index < 0 || index >= LINE6_ISO_BUFFERS) {
39 spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags);
40 dev_err(line6pcm->line6->ifcdev, "no free URB found\n");
41 return -EINVAL;
42 }
43
44 urb_in = line6pcm->urb_audio_in[index];
45 urb_size = 0;
46
47 for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
48 struct usb_iso_packet_descriptor *fin =
49 &urb_in->iso_frame_desc[i];
50 fin->offset = urb_size;
51 fin->length = line6pcm->max_packet_size;
52 urb_size += line6pcm->max_packet_size;
53 }
54
55 urb_in->transfer_buffer =
56 line6pcm->buffer_in +
57 index * LINE6_ISO_PACKETS * line6pcm->max_packet_size;
58 urb_in->transfer_buffer_length = urb_size;
59 urb_in->context = line6pcm;
60
61 ret = usb_submit_urb(urb_in, GFP_ATOMIC);
62
63 if (ret == 0)
64 set_bit(index, &line6pcm->active_urb_in);
65 else
66 dev_err(line6pcm->line6->ifcdev,
67 "URB in #%d submission failed (%d)\n", index, ret);
68
69 spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags);
70 return 0;
71}
72
73
74
75
76int line6_submit_audio_in_all_urbs(struct snd_line6_pcm *line6pcm)
77{
78 int ret, i;
79
80 for (i = 0; i < LINE6_ISO_BUFFERS; ++i) {
81 ret = submit_audio_in_urb(line6pcm);
82 if (ret < 0)
83 return ret;
84 }
85
86 return 0;
87}
88
89
90
91
92void line6_unlink_audio_in_urbs(struct snd_line6_pcm *line6pcm)
93{
94 unsigned int i;
95
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)) {
99 struct urb *u = line6pcm->urb_audio_in[i];
100 usb_unlink_urb(u);
101 }
102 }
103 }
104}
105
106
107
108
109
110void line6_wait_clear_audio_in_urbs(struct snd_line6_pcm *line6pcm)
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 }
122 if (!alive)
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);
129}
130
131
132
133
134void line6_unlink_wait_clear_audio_in_urbs(struct snd_line6_pcm *line6pcm)
135{
136 line6_unlink_audio_in_urbs(line6pcm);
137 line6_wait_clear_audio_in_urbs(line6pcm);
138}
139
140
141
142
143void 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
151 if (runtime == NULL)
152 return;
153
154 if (line6pcm->pos_in_done + frames > runtime->buffer_size) {
155
156
157
158
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);
168 } else {
169
170 dev_err(line6pcm->line6->ifcdev,
171 "driver bug: len = %d\n", len);
172 }
173 } else {
174
175 memcpy(runtime->dma_area +
176 line6pcm->pos_in_done * bytes_per_frame, fbuf, fsize);
177 }
178
179 line6pcm->pos_in_done += frames;
180 if (line6pcm->pos_in_done >= runtime->buffer_size)
181 line6pcm->pos_in_done -= runtime->buffer_size;
182}
183
184void 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
189 line6pcm->bytes_in += length;
190 if (line6pcm->bytes_in >= line6pcm->period_in) {
191 line6pcm->bytes_in %= line6pcm->period_in;
192 snd_pcm_period_elapsed(substream);
193 }
194}
195
196void line6_free_capture_buffer(struct snd_line6_pcm *line6pcm)
197{
198 kfree(line6pcm->buffer_in);
199 line6pcm->buffer_in = NULL;
200}
201
202
203
204
205static void audio_in_callback(struct urb *urb)
206{
207 int i, index, length = 0, shutdown = 0;
208 unsigned long flags;
209
210 struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context;
211
212 line6pcm->last_frame_in = urb->start_frame;
213
214
215 for (index = 0; index < LINE6_ISO_BUFFERS; ++index)
216 if (urb == line6pcm->urb_audio_in[index])
217 break;
218
219#ifdef CONFIG_LINE6_USB_DUMP_PCM
220 for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
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);
226 }
227#endif
228
229 spin_lock_irqsave(&line6pcm->lock_audio_in, flags);
230
231 for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
232 char *fbuf;
233 int fsize;
234 struct usb_iso_packet_descriptor *fin = &urb->iso_frame_desc[i];
235
236 if (fin->status == -EXDEV) {
237 shutdown = 1;
238 break;
239 }
240
241 fbuf = urb->transfer_buffer + fin->offset;
242 fsize = fin->actual_length;
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
250 length += fsize;
251
252
253 line6pcm->prev_fbuf = fbuf;
254 line6pcm->prev_fsize = fsize;
255
256#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
257 if (!(line6pcm->flags & LINE6_BITS_PCM_IMPULSE))
258#endif
259 if (test_bit(LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM,
260 &line6pcm->flags) && (fsize > 0))
261 line6_capture_copy(line6pcm, fbuf, fsize);
262 }
263
264 clear_bit(index, &line6pcm->active_urb_in);
265
266 if (test_and_clear_bit(index, &line6pcm->unlink_urb_in))
267 shutdown = 1;
268
269 spin_unlock_irqrestore(&line6pcm->lock_audio_in, flags);
270
271 if (!shutdown) {
272 submit_audio_in_urb(line6pcm);
273
274#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
275 if (!(line6pcm->flags & LINE6_BITS_PCM_IMPULSE))
276#endif
277 if (test_bit(LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM,
278 &line6pcm->flags))
279 line6_capture_check_period(line6pcm, length);
280 }
281}
282
283
284static 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
290 err = snd_pcm_hw_constraint_ratdens(runtime, 0,
291 SNDRV_PCM_HW_PARAM_RATE,
292 (&line6pcm->
293 properties->snd_line6_rates));
294 if (err < 0)
295 return err;
296
297 runtime->hw = line6pcm->properties->snd_line6_capture_hw;
298 return 0;
299}
300
301
302static int snd_line6_capture_close(struct snd_pcm_substream *substream)
303{
304 return 0;
305}
306
307
308static int snd_line6_capture_hw_params(struct snd_pcm_substream *substream,
309 struct snd_pcm_hw_params *hw_params)
310{
311 int ret;
312 struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
313
314
315
316 if (line6pcm == NULL) {
317 if (substream->pcm == NULL)
318 return -ENOMEM;
319 if (substream->pcm->private_data == NULL)
320 return -ENOMEM;
321 substream->private_data = substream->pcm->private_data;
322 line6pcm = snd_pcm_substream_chip(substream);
323 }
324
325
326 ret = line6_pcm_acquire(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
327
328 if (ret < 0)
329 return ret;
330
331 ret = snd_pcm_lib_malloc_pages(substream,
332 params_buffer_bytes(hw_params));
333 if (ret < 0) {
334 line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
335 return ret;
336 }
337
338 line6pcm->period_in = params_period_bytes(hw_params);
339 return 0;
340}
341
342
343static int snd_line6_capture_hw_free(struct snd_pcm_substream *substream)
344{
345 struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
346 line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
347 return snd_pcm_lib_free_pages(substream);
348}
349
350
351int snd_line6_capture_trigger(struct snd_line6_pcm *line6pcm, int cmd)
352{
353 int err;
354
355 switch (cmd) {
356 case SNDRV_PCM_TRIGGER_START:
357#ifdef CONFIG_PM
358 case SNDRV_PCM_TRIGGER_RESUME:
359#endif
360 err = line6_pcm_acquire(line6pcm,
361 LINE6_BIT_PCM_ALSA_CAPTURE_STREAM);
362
363 if (err < 0)
364 return err;
365
366 break;
367
368 case SNDRV_PCM_TRIGGER_STOP:
369#ifdef CONFIG_PM
370 case SNDRV_PCM_TRIGGER_SUSPEND:
371#endif
372 err = line6_pcm_release(line6pcm,
373 LINE6_BIT_PCM_ALSA_CAPTURE_STREAM);
374
375 if (err < 0)
376 return err;
377
378 break;
379
380 default:
381 return -EINVAL;
382 }
383
384 return 0;
385}
386
387
388static snd_pcm_uframes_t
389snd_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
396struct snd_pcm_ops snd_line6_capture_ops = {
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,
405};
406
407int line6_create_audio_in_urbs(struct snd_line6_pcm *line6pcm)
408{
409 int i;
410
411
412 for (i = 0; i < LINE6_ISO_BUFFERS; ++i) {
413 struct urb *urb;
414
415
416 urb = line6pcm->urb_audio_in[i] =
417 usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL);
418
419 if (urb == NULL) {
420 dev_err(line6pcm->line6->ifcdev, "Out of memory\n");
421 return -ENOMEM;
422 }
423
424 urb->dev = line6pcm->line6->usbdev;
425 urb->pipe =
426 usb_rcvisocpipe(line6pcm->line6->usbdev,
427 line6pcm->ep_audio_read &
428 USB_ENDPOINT_NUMBER_MASK);
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}
439