]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
15 | */ | |
16 | ||
17 | /* USX2Y "rawusb" aka hwdep_pcm implementation | |
18 | ||
19 | Its usb's unableness to atomically handle power of 2 period sized data chuncs | |
20 | at standard samplerates, | |
21 | what led to this part of the usx2y module: | |
22 | It provides the alsa kernel half of the usx2y-alsa-jack driver pair. | |
23 | The pair uses a hardware dependant alsa-device for mmaped pcm transport. | |
24 | Advantage achieved: | |
25 | The usb_hc moves pcm data from/into memory via DMA. | |
26 | That memory is mmaped by jack's usx2y driver. | |
27 | Jack's usx2y driver is the first/last to read/write pcm data. | |
28 | Read/write is a combination of power of 2 period shaping and | |
29 | float/int conversation. | |
30 | Compared to mainline alsa/jack we leave out power of 2 period shaping inside | |
31 | snd-usb-usx2y which needs memcpy() and additional buffers. | |
32 | As a side effect possible unwanted pcm-data coruption resulting of | |
33 | standard alsa's snd-usb-usx2y period shaping scheme falls away. | |
34 | Result is sane jack operation at buffering schemes down to 128frames, | |
35 | 2 periods. | |
36 | plain usx2y alsa mode is able to achieve 64frames, 4periods, but only at the | |
37 | cost of easier triggered i.e. aeolus xruns (128 or 256frames, | |
38 | 2periods works but is useless cause of crackling). | |
39 | ||
40 | This is a first "proof of concept" implementation. | |
41 | Later, funcionalities should migrate to more apropriate places: | |
42 | Userland: | |
43 | - The jackd could mmap its float-pcm buffers directly from alsa-lib. | |
44 | - alsa-lib could provide power of 2 period sized shaping combined with int/float | |
45 | conversation. | |
46 | Currently the usx2y jack driver provides above 2 services. | |
47 | Kernel: | |
48 | - rawusb dma pcm buffer transport should go to snd-usb-lib, so also snd-usb-audio | |
49 | devices can use it. | |
50 | Currently rawusb dma pcm buffer transport (this file) is only available to snd-usb-usx2y. | |
51 | */ | |
52 | ||
53 | #include "usbusx2yaudio.c" | |
54 | ||
55 | #if defined(USX2Y_NRPACKS_VARIABLE) || (!defined(USX2Y_NRPACKS_VARIABLE) && USX2Y_NRPACKS == 1) | |
56 | ||
57 | #include <sound/hwdep.h> | |
58 | ||
59 | ||
60 | static int usX2Y_usbpcm_urb_capt_retire(snd_usX2Y_substream_t *subs) | |
61 | { | |
62 | struct urb *urb = subs->completed_urb; | |
63 | snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime; | |
64 | int i, lens = 0, hwptr_done = subs->hwptr_done; | |
65 | usX2Ydev_t *usX2Y = subs->usX2Y; | |
66 | if (0 > usX2Y->hwdep_pcm_shm->capture_iso_start) { //FIXME | |
67 | int head = usX2Y->hwdep_pcm_shm->captured_iso_head + 1; | |
68 | if (head >= ARRAY_SIZE(usX2Y->hwdep_pcm_shm->captured_iso)) | |
69 | head = 0; | |
70 | usX2Y->hwdep_pcm_shm->capture_iso_start = head; | |
71 | snd_printdd("cap start %i\n", head); | |
72 | } | |
73 | for (i = 0; i < nr_of_packs(); i++) { | |
74 | if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */ | |
75 | snd_printk("activ frame status %i. Most propably some hardware problem.\n", urb->iso_frame_desc[i].status); | |
76 | return urb->iso_frame_desc[i].status; | |
77 | } | |
78 | lens += urb->iso_frame_desc[i].actual_length / usX2Y->stride; | |
79 | } | |
80 | if ((hwptr_done += lens) >= runtime->buffer_size) | |
81 | hwptr_done -= runtime->buffer_size; | |
82 | subs->hwptr_done = hwptr_done; | |
83 | subs->transfer_done += lens; | |
84 | /* update the pointer, call callback if necessary */ | |
85 | if (subs->transfer_done >= runtime->period_size) { | |
86 | subs->transfer_done -= runtime->period_size; | |
87 | snd_pcm_period_elapsed(subs->pcm_substream); | |
88 | } | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static inline int usX2Y_iso_frames_per_buffer(snd_pcm_runtime_t *runtime, usX2Ydev_t * usX2Y) | |
93 | { | |
94 | return (runtime->buffer_size * 1000) / usX2Y->rate + 1; //FIXME: so far only correct period_size == 2^x ? | |
95 | } | |
96 | ||
97 | /* | |
98 | * prepare urb for playback data pipe | |
99 | * | |
100 | * we copy the data directly from the pcm buffer. | |
101 | * the current position to be copied is held in hwptr field. | |
102 | * since a urb can handle only a single linear buffer, if the total | |
103 | * transferred area overflows the buffer boundary, we cannot send | |
104 | * it directly from the buffer. thus the data is once copied to | |
105 | * a temporary buffer and urb points to that. | |
106 | */ | |
107 | static int usX2Y_hwdep_urb_play_prepare(snd_usX2Y_substream_t *subs, | |
108 | struct urb *urb) | |
109 | { | |
110 | int count, counts, pack; | |
111 | usX2Ydev_t *usX2Y = subs->usX2Y; | |
112 | struct snd_usX2Y_hwdep_pcm_shm *shm = usX2Y->hwdep_pcm_shm; | |
113 | snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime; | |
114 | ||
115 | if (0 > shm->playback_iso_start) { | |
116 | shm->playback_iso_start = shm->captured_iso_head - | |
117 | usX2Y_iso_frames_per_buffer(runtime, usX2Y); | |
118 | if (0 > shm->playback_iso_start) | |
119 | shm->playback_iso_start += ARRAY_SIZE(shm->captured_iso); | |
120 | shm->playback_iso_head = shm->playback_iso_start; | |
121 | } | |
122 | ||
123 | count = 0; | |
124 | for (pack = 0; pack < nr_of_packs(); pack++) { | |
125 | /* calculate the size of a packet */ | |
126 | counts = shm->captured_iso[shm->playback_iso_head].length / usX2Y->stride; | |
127 | if (counts < 43 || counts > 50) { | |
128 | snd_printk("should not be here with counts=%i\n", counts); | |
129 | return -EPIPE; | |
130 | } | |
131 | /* set up descriptor */ | |
132 | urb->iso_frame_desc[pack].offset = shm->captured_iso[shm->playback_iso_head].offset; | |
133 | urb->iso_frame_desc[pack].length = shm->captured_iso[shm->playback_iso_head].length; | |
134 | if (atomic_read(&subs->state) != state_RUNNING) | |
135 | memset((char *)urb->transfer_buffer + urb->iso_frame_desc[pack].offset, 0, | |
136 | urb->iso_frame_desc[pack].length); | |
137 | if (++shm->playback_iso_head >= ARRAY_SIZE(shm->captured_iso)) | |
138 | shm->playback_iso_head = 0; | |
139 | count += counts; | |
140 | } | |
141 | urb->transfer_buffer_length = count * usX2Y->stride; | |
142 | return 0; | |
143 | } | |
144 | ||
145 | ||
146 | static inline void usX2Y_usbpcm_urb_capt_iso_advance(snd_usX2Y_substream_t *subs, struct urb *urb) | |
147 | { | |
148 | int pack; | |
149 | for (pack = 0; pack < nr_of_packs(); ++pack) { | |
150 | struct usb_iso_packet_descriptor *desc = urb->iso_frame_desc + pack; | |
151 | if (NULL != subs) { | |
152 | snd_usX2Y_hwdep_pcm_shm_t *shm = subs->usX2Y->hwdep_pcm_shm; | |
153 | int head = shm->captured_iso_head + 1; | |
154 | if (head >= ARRAY_SIZE(shm->captured_iso)) | |
155 | head = 0; | |
156 | shm->captured_iso[head].frame = urb->start_frame + pack; | |
157 | shm->captured_iso[head].offset = desc->offset; | |
158 | shm->captured_iso[head].length = desc->actual_length; | |
159 | shm->captured_iso_head = head; | |
160 | shm->captured_iso_frames++; | |
161 | } | |
162 | if ((desc->offset += desc->length * NRURBS*nr_of_packs()) + | |
163 | desc->length >= SSS) | |
164 | desc->offset -= (SSS - desc->length); | |
165 | } | |
166 | } | |
167 | ||
168 | static inline int usX2Y_usbpcm_usbframe_complete(snd_usX2Y_substream_t *capsubs, | |
169 | snd_usX2Y_substream_t *capsubs2, | |
170 | snd_usX2Y_substream_t *playbacksubs, int frame) | |
171 | { | |
172 | int err, state; | |
173 | struct urb *urb = playbacksubs->completed_urb; | |
174 | ||
175 | state = atomic_read(&playbacksubs->state); | |
176 | if (NULL != urb) { | |
177 | if (state == state_RUNNING) | |
178 | usX2Y_urb_play_retire(playbacksubs, urb); | |
179 | else | |
180 | if (state >= state_PRERUNNING) { | |
181 | atomic_inc(&playbacksubs->state); | |
182 | } | |
183 | } else { | |
184 | switch (state) { | |
185 | case state_STARTING1: | |
186 | urb = playbacksubs->urb[0]; | |
187 | atomic_inc(&playbacksubs->state); | |
188 | break; | |
189 | case state_STARTING2: | |
190 | urb = playbacksubs->urb[1]; | |
191 | atomic_inc(&playbacksubs->state); | |
192 | break; | |
193 | } | |
194 | } | |
195 | if (urb) { | |
196 | if ((err = usX2Y_hwdep_urb_play_prepare(playbacksubs, urb)) || | |
197 | (err = usX2Y_urb_submit(playbacksubs, urb, frame))) { | |
198 | return err; | |
199 | } | |
200 | } | |
201 | ||
202 | playbacksubs->completed_urb = NULL; | |
203 | ||
204 | state = atomic_read(&capsubs->state); | |
205 | if (state >= state_PREPARED) { | |
206 | if (state == state_RUNNING) { | |
207 | if ((err = usX2Y_usbpcm_urb_capt_retire(capsubs))) | |
208 | return err; | |
209 | } else { | |
210 | if (state >= state_PRERUNNING) | |
211 | atomic_inc(&capsubs->state); | |
212 | } | |
213 | usX2Y_usbpcm_urb_capt_iso_advance(capsubs, capsubs->completed_urb); | |
214 | if (NULL != capsubs2) | |
215 | usX2Y_usbpcm_urb_capt_iso_advance(NULL, capsubs2->completed_urb); | |
216 | if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame))) | |
217 | return err; | |
218 | if (NULL != capsubs2) | |
219 | if ((err = usX2Y_urb_submit(capsubs2, capsubs2->completed_urb, frame))) | |
220 | return err; | |
221 | } | |
222 | capsubs->completed_urb = NULL; | |
223 | if (NULL != capsubs2) | |
224 | capsubs2->completed_urb = NULL; | |
225 | return 0; | |
226 | } | |
227 | ||
228 | ||
229 | static void i_usX2Y_usbpcm_urb_complete(struct urb *urb, struct pt_regs *regs) | |
230 | { | |
231 | snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context; | |
232 | usX2Ydev_t *usX2Y = subs->usX2Y; | |
233 | snd_usX2Y_substream_t *capsubs, *capsubs2, *playbacksubs; | |
234 | ||
235 | if (unlikely(atomic_read(&subs->state) < state_PREPARED)) { | |
236 | snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", usb_get_current_frame_number(usX2Y->chip.dev), subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", urb->status, urb->start_frame); | |
237 | return; | |
238 | } | |
239 | if (unlikely(urb->status)) { | |
240 | usX2Y_error_urb_status(usX2Y, subs, urb); | |
241 | return; | |
242 | } | |
243 | if (likely((0xFFFF & urb->start_frame) == usX2Y->wait_iso_frame)) | |
244 | subs->completed_urb = urb; | |
245 | else { | |
246 | usX2Y_error_sequence(usX2Y, subs, urb); | |
247 | return; | |
248 | } | |
249 | ||
250 | capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; | |
251 | capsubs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2]; | |
252 | playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; | |
253 | if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED && | |
254 | (NULL == capsubs2 || capsubs2->completed_urb) && | |
255 | (playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) { | |
256 | if (!usX2Y_usbpcm_usbframe_complete(capsubs, capsubs2, playbacksubs, urb->start_frame)) { | |
257 | if (nr_of_packs() <= urb->start_frame && | |
258 | urb->start_frame <= (2 * nr_of_packs() - 1)) // uhci and ohci | |
259 | usX2Y->wait_iso_frame = urb->start_frame - nr_of_packs(); | |
260 | else | |
261 | usX2Y->wait_iso_frame += nr_of_packs(); | |
262 | } else { | |
263 | snd_printdd("\n"); | |
264 | usX2Y_clients_stop(usX2Y); | |
265 | } | |
266 | } | |
267 | } | |
268 | ||
269 | ||
270 | static void usX2Y_hwdep_urb_release(struct urb** urb) | |
271 | { | |
272 | usb_kill_urb(*urb); | |
273 | usb_free_urb(*urb); | |
274 | *urb = NULL; | |
275 | } | |
276 | ||
277 | /* | |
278 | * release a substream | |
279 | */ | |
280 | static void usX2Y_usbpcm_urbs_release(snd_usX2Y_substream_t *subs) | |
281 | { | |
282 | int i; | |
283 | snd_printdd("snd_usX2Y_urbs_release() %i\n", subs->endpoint); | |
284 | for (i = 0; i < NRURBS; i++) | |
285 | usX2Y_hwdep_urb_release(subs->urb + i); | |
286 | } | |
287 | ||
288 | static void usX2Y_usbpcm_subs_startup_finish(usX2Ydev_t * usX2Y) | |
289 | { | |
290 | usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_urb_complete); | |
291 | usX2Y->prepare_subs = NULL; | |
292 | } | |
293 | ||
294 | static void i_usX2Y_usbpcm_subs_startup(struct urb *urb, struct pt_regs *regs) | |
295 | { | |
296 | snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context; | |
297 | usX2Ydev_t *usX2Y = subs->usX2Y; | |
298 | snd_usX2Y_substream_t *prepare_subs = usX2Y->prepare_subs; | |
299 | if (NULL != prepare_subs && | |
300 | urb->start_frame == prepare_subs->urb[0]->start_frame) { | |
301 | atomic_inc(&prepare_subs->state); | |
302 | if (prepare_subs == usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]) { | |
303 | snd_usX2Y_substream_t *cap_subs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2]; | |
304 | if (cap_subs2 != NULL) | |
305 | atomic_inc(&cap_subs2->state); | |
306 | } | |
307 | usX2Y_usbpcm_subs_startup_finish(usX2Y); | |
308 | wake_up(&usX2Y->prepare_wait_queue); | |
309 | } | |
310 | ||
311 | i_usX2Y_usbpcm_urb_complete(urb, regs); | |
312 | } | |
313 | ||
314 | /* | |
315 | * initialize a substream's urbs | |
316 | */ | |
317 | static int usX2Y_usbpcm_urbs_allocate(snd_usX2Y_substream_t *subs) | |
318 | { | |
319 | int i; | |
320 | unsigned int pipe; | |
321 | int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; | |
322 | struct usb_device *dev = subs->usX2Y->chip.dev; | |
323 | ||
324 | pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) : | |
325 | usb_rcvisocpipe(dev, subs->endpoint); | |
326 | subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback); | |
327 | if (!subs->maxpacksize) | |
328 | return -EINVAL; | |
329 | ||
330 | /* allocate and initialize data urbs */ | |
331 | for (i = 0; i < NRURBS; i++) { | |
332 | struct urb** purb = subs->urb + i; | |
333 | if (*purb) { | |
334 | usb_kill_urb(*purb); | |
335 | continue; | |
336 | } | |
337 | *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL); | |
338 | if (NULL == *purb) { | |
339 | usX2Y_usbpcm_urbs_release(subs); | |
340 | return -ENOMEM; | |
341 | } | |
342 | (*purb)->transfer_buffer = is_playback ? | |
343 | subs->usX2Y->hwdep_pcm_shm->playback : ( | |
344 | subs->endpoint == 0x8 ? | |
345 | subs->usX2Y->hwdep_pcm_shm->capture0x8 : | |
346 | subs->usX2Y->hwdep_pcm_shm->capture0xA); | |
347 | ||
348 | (*purb)->dev = dev; | |
349 | (*purb)->pipe = pipe; | |
350 | (*purb)->number_of_packets = nr_of_packs(); | |
351 | (*purb)->context = subs; | |
352 | (*purb)->interval = 1; | |
353 | (*purb)->complete = i_usX2Y_usbpcm_subs_startup; | |
354 | } | |
355 | return 0; | |
356 | } | |
357 | ||
358 | /* | |
359 | * free the buffer | |
360 | */ | |
361 | static int snd_usX2Y_usbpcm_hw_free(snd_pcm_substream_t *substream) | |
362 | { | |
363 | snd_pcm_runtime_t *runtime = substream->runtime; | |
364 | snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data, | |
365 | *cap_subs2 = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2]; | |
366 | down(&subs->usX2Y->prepare_mutex); | |
367 | snd_printdd("snd_usX2Y_usbpcm_hw_free(%p)\n", substream); | |
368 | ||
369 | if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) { | |
370 | snd_usX2Y_substream_t *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; | |
371 | atomic_set(&subs->state, state_STOPPED); | |
372 | usX2Y_usbpcm_urbs_release(subs); | |
373 | if (!cap_subs->pcm_substream || | |
374 | !cap_subs->pcm_substream->runtime || | |
375 | !cap_subs->pcm_substream->runtime->status || | |
376 | cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) { | |
377 | atomic_set(&cap_subs->state, state_STOPPED); | |
378 | if (NULL != cap_subs2) | |
379 | atomic_set(&cap_subs2->state, state_STOPPED); | |
380 | usX2Y_usbpcm_urbs_release(cap_subs); | |
381 | if (NULL != cap_subs2) | |
382 | usX2Y_usbpcm_urbs_release(cap_subs2); | |
383 | } | |
384 | } else { | |
385 | snd_usX2Y_substream_t *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; | |
386 | if (atomic_read(&playback_subs->state) < state_PREPARED) { | |
387 | atomic_set(&subs->state, state_STOPPED); | |
388 | if (NULL != cap_subs2) | |
389 | atomic_set(&cap_subs2->state, state_STOPPED); | |
390 | usX2Y_usbpcm_urbs_release(subs); | |
391 | if (NULL != cap_subs2) | |
392 | usX2Y_usbpcm_urbs_release(cap_subs2); | |
393 | } | |
394 | } | |
395 | up(&subs->usX2Y->prepare_mutex); | |
396 | return snd_pcm_lib_free_pages(substream); | |
397 | } | |
398 | ||
399 | static void usX2Y_usbpcm_subs_startup(snd_usX2Y_substream_t *subs) | |
400 | { | |
401 | usX2Ydev_t * usX2Y = subs->usX2Y; | |
402 | usX2Y->prepare_subs = subs; | |
403 | subs->urb[0]->start_frame = -1; | |
404 | smp_wmb(); // Make shure above modifications are seen by i_usX2Y_subs_startup() | |
405 | usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_subs_startup); | |
406 | } | |
407 | ||
408 | static int usX2Y_usbpcm_urbs_start(snd_usX2Y_substream_t *subs) | |
409 | { | |
410 | int p, u, err, | |
411 | stream = subs->pcm_substream->stream; | |
412 | usX2Ydev_t *usX2Y = subs->usX2Y; | |
413 | ||
414 | if (SNDRV_PCM_STREAM_CAPTURE == stream) { | |
415 | usX2Y->hwdep_pcm_shm->captured_iso_head = -1; | |
416 | usX2Y->hwdep_pcm_shm->captured_iso_frames = 0; | |
417 | } | |
418 | ||
419 | for (p = 0; 3 >= (stream + p); p += 2) { | |
420 | snd_usX2Y_substream_t *subs = usX2Y->subs[stream + p]; | |
421 | if (subs != NULL) { | |
422 | if ((err = usX2Y_usbpcm_urbs_allocate(subs)) < 0) | |
423 | return err; | |
424 | subs->completed_urb = NULL; | |
425 | } | |
426 | } | |
427 | ||
428 | for (p = 0; p < 4; p++) { | |
429 | snd_usX2Y_substream_t *subs = usX2Y->subs[p]; | |
430 | if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED) | |
431 | goto start; | |
432 | } | |
433 | usX2Y->wait_iso_frame = -1; | |
434 | ||
435 | start: | |
436 | usX2Y_usbpcm_subs_startup(subs); | |
437 | for (u = 0; u < NRURBS; u++) { | |
438 | for (p = 0; 3 >= (stream + p); p += 2) { | |
439 | snd_usX2Y_substream_t *subs = usX2Y->subs[stream + p]; | |
440 | if (subs != NULL) { | |
441 | struct urb *urb = subs->urb[u]; | |
442 | if (usb_pipein(urb->pipe)) { | |
443 | unsigned long pack; | |
444 | if (0 == u) | |
445 | atomic_set(&subs->state, state_STARTING3); | |
446 | urb->dev = usX2Y->chip.dev; | |
447 | urb->transfer_flags = URB_ISO_ASAP; | |
448 | for (pack = 0; pack < nr_of_packs(); pack++) { | |
449 | urb->iso_frame_desc[pack].offset = subs->maxpacksize * (pack + u * nr_of_packs()); | |
450 | urb->iso_frame_desc[pack].length = subs->maxpacksize; | |
451 | } | |
452 | urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); | |
453 | if ((err = usb_submit_urb(urb, GFP_KERNEL)) < 0) { | |
454 | snd_printk (KERN_ERR "cannot usb_submit_urb() for urb %d, err = %d\n", u, err); | |
455 | err = -EPIPE; | |
456 | goto cleanup; | |
457 | } else { | |
458 | snd_printdd("%i\n", urb->start_frame); | |
459 | if (0 > usX2Y->wait_iso_frame) | |
460 | usX2Y->wait_iso_frame = urb->start_frame; | |
461 | } | |
462 | urb->transfer_flags = 0; | |
463 | } else { | |
464 | atomic_set(&subs->state, state_STARTING1); | |
465 | break; | |
466 | } | |
467 | } | |
468 | } | |
469 | } | |
470 | err = 0; | |
471 | wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs); | |
472 | if (atomic_read(&subs->state) != state_PREPARED) | |
473 | err = -EPIPE; | |
474 | ||
475 | cleanup: | |
476 | if (err) { | |
477 | usX2Y_subs_startup_finish(usX2Y); // Call it now | |
478 | usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything | |
479 | } | |
480 | return err; | |
481 | } | |
482 | ||
483 | /* | |
484 | * prepare callback | |
485 | * | |
486 | * set format and initialize urbs | |
487 | */ | |
488 | static int snd_usX2Y_usbpcm_prepare(snd_pcm_substream_t *substream) | |
489 | { | |
490 | snd_pcm_runtime_t *runtime = substream->runtime; | |
491 | snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data; | |
492 | usX2Ydev_t *usX2Y = subs->usX2Y; | |
493 | snd_usX2Y_substream_t *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; | |
494 | int err = 0; | |
495 | snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream); | |
496 | ||
497 | if (NULL == usX2Y->hwdep_pcm_shm) { | |
498 | if (NULL == (usX2Y->hwdep_pcm_shm = snd_malloc_pages(sizeof(snd_usX2Y_hwdep_pcm_shm_t), GFP_KERNEL))) | |
499 | return -ENOMEM; | |
500 | memset(usX2Y->hwdep_pcm_shm, 0, sizeof(snd_usX2Y_hwdep_pcm_shm_t)); | |
501 | } | |
502 | ||
503 | down(&usX2Y->prepare_mutex); | |
504 | usX2Y_subs_prepare(subs); | |
505 | // Start hardware streams | |
506 | // SyncStream first.... | |
507 | if (atomic_read(&capsubs->state) < state_PREPARED) { | |
508 | if (usX2Y->format != runtime->format) | |
509 | if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0) | |
510 | goto up_prepare_mutex; | |
511 | if (usX2Y->rate != runtime->rate) | |
512 | if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0) | |
513 | goto up_prepare_mutex; | |
514 | snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe"); | |
515 | if (0 > (err = usX2Y_usbpcm_urbs_start(capsubs))) | |
516 | goto up_prepare_mutex; | |
517 | } | |
518 | ||
519 | if (subs != capsubs) { | |
520 | usX2Y->hwdep_pcm_shm->playback_iso_start = -1; | |
521 | if (atomic_read(&subs->state) < state_PREPARED) { | |
522 | while (usX2Y_iso_frames_per_buffer(runtime, usX2Y) > usX2Y->hwdep_pcm_shm->captured_iso_frames) { | |
523 | signed long timeout; | |
524 | snd_printd("Wait: iso_frames_per_buffer=%i,captured_iso_frames=%i\n", usX2Y_iso_frames_per_buffer(runtime, usX2Y), usX2Y->hwdep_pcm_shm->captured_iso_frames); | |
525 | set_current_state(TASK_INTERRUPTIBLE); | |
526 | timeout = schedule_timeout(HZ/100 + 1); | |
527 | if (signal_pending(current)) { | |
528 | err = -ERESTARTSYS; | |
529 | goto up_prepare_mutex; | |
530 | } | |
531 | } | |
532 | if (0 > (err = usX2Y_usbpcm_urbs_start(subs))) | |
533 | goto up_prepare_mutex; | |
534 | } | |
535 | snd_printd("Ready: iso_frames_per_buffer=%i,captured_iso_frames=%i\n", usX2Y_iso_frames_per_buffer(runtime, usX2Y), usX2Y->hwdep_pcm_shm->captured_iso_frames); | |
536 | } else | |
537 | usX2Y->hwdep_pcm_shm->capture_iso_start = -1; | |
538 | ||
539 | up_prepare_mutex: | |
540 | up(&usX2Y->prepare_mutex); | |
541 | return err; | |
542 | } | |
543 | ||
544 | static snd_pcm_hardware_t snd_usX2Y_4c = | |
545 | { | |
546 | .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | | |
547 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
548 | SNDRV_PCM_INFO_MMAP_VALID), | |
549 | .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE, | |
550 | .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, | |
551 | .rate_min = 44100, | |
552 | .rate_max = 48000, | |
553 | .channels_min = 2, | |
554 | .channels_max = 4, | |
555 | .buffer_bytes_max = (2*128*1024), | |
556 | .period_bytes_min = 64, | |
557 | .period_bytes_max = (128*1024), | |
558 | .periods_min = 2, | |
559 | .periods_max = 1024, | |
560 | .fifo_size = 0 | |
561 | }; | |
562 | ||
563 | ||
564 | ||
565 | static int snd_usX2Y_usbpcm_open(snd_pcm_substream_t *substream) | |
566 | { | |
567 | snd_usX2Y_substream_t *subs = ((snd_usX2Y_substream_t **) | |
568 | snd_pcm_substream_chip(substream))[substream->stream]; | |
569 | snd_pcm_runtime_t *runtime = substream->runtime; | |
570 | ||
571 | if (!(subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)) | |
572 | return -EBUSY; | |
573 | ||
574 | runtime->hw = SNDRV_PCM_STREAM_PLAYBACK == substream->stream ? snd_usX2Y_2c : | |
575 | (subs->usX2Y->subs[3] ? snd_usX2Y_4c : snd_usX2Y_2c); | |
576 | runtime->private_data = subs; | |
577 | subs->pcm_substream = substream; | |
578 | snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | ||
583 | static int snd_usX2Y_usbpcm_close(snd_pcm_substream_t *substream) | |
584 | { | |
585 | snd_pcm_runtime_t *runtime = substream->runtime; | |
586 | snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data; | |
587 | int err = 0; | |
588 | snd_printd("\n"); | |
589 | subs->pcm_substream = NULL; | |
590 | return err; | |
591 | } | |
592 | ||
593 | ||
594 | static snd_pcm_ops_t snd_usX2Y_usbpcm_ops = | |
595 | { | |
596 | .open = snd_usX2Y_usbpcm_open, | |
597 | .close = snd_usX2Y_usbpcm_close, | |
598 | .ioctl = snd_pcm_lib_ioctl, | |
599 | .hw_params = snd_usX2Y_pcm_hw_params, | |
600 | .hw_free = snd_usX2Y_usbpcm_hw_free, | |
601 | .prepare = snd_usX2Y_usbpcm_prepare, | |
602 | .trigger = snd_usX2Y_pcm_trigger, | |
603 | .pointer = snd_usX2Y_pcm_pointer, | |
604 | }; | |
605 | ||
606 | ||
607 | static int usX2Y_pcms_lock_check(snd_card_t *card) | |
608 | { | |
609 | struct list_head *list; | |
610 | snd_device_t *dev; | |
611 | snd_pcm_t *pcm; | |
612 | int err = 0; | |
613 | list_for_each(list, &card->devices) { | |
614 | dev = snd_device(list); | |
615 | if (dev->type != SNDRV_DEV_PCM) | |
616 | continue; | |
617 | pcm = dev->device_data; | |
618 | down(&pcm->open_mutex); | |
619 | } | |
620 | list_for_each(list, &card->devices) { | |
621 | int s; | |
622 | dev = snd_device(list); | |
623 | if (dev->type != SNDRV_DEV_PCM) | |
624 | continue; | |
625 | pcm = dev->device_data; | |
626 | for (s = 0; s < 2; ++s) { | |
627 | snd_pcm_substream_t *substream; | |
628 | substream = pcm->streams[s].substream; | |
629 | if (substream && substream->open_flag) | |
630 | err = -EBUSY; | |
631 | } | |
632 | } | |
633 | return err; | |
634 | } | |
635 | ||
636 | ||
637 | static void usX2Y_pcms_unlock(snd_card_t *card) | |
638 | { | |
639 | struct list_head *list; | |
640 | snd_device_t *dev; | |
641 | snd_pcm_t *pcm; | |
642 | list_for_each(list, &card->devices) { | |
643 | dev = snd_device(list); | |
644 | if (dev->type != SNDRV_DEV_PCM) | |
645 | continue; | |
646 | pcm = dev->device_data; | |
647 | up(&pcm->open_mutex); | |
648 | } | |
649 | } | |
650 | ||
651 | ||
652 | static int snd_usX2Y_hwdep_pcm_open(snd_hwdep_t *hw, struct file *file) | |
653 | { | |
654 | // we need to be the first | |
655 | snd_card_t *card = hw->card; | |
656 | int err = usX2Y_pcms_lock_check(card); | |
657 | if (0 == err) | |
658 | usX2Y(card)->chip_status |= USX2Y_STAT_CHIP_MMAP_PCM_URBS; | |
659 | usX2Y_pcms_unlock(card); | |
660 | return err; | |
661 | } | |
662 | ||
663 | ||
664 | static int snd_usX2Y_hwdep_pcm_release(snd_hwdep_t *hw, struct file *file) | |
665 | { | |
666 | snd_card_t *card = hw->card; | |
667 | int err = usX2Y_pcms_lock_check(card); | |
668 | if (0 == err) | |
669 | usX2Y(hw->card)->chip_status &= ~USX2Y_STAT_CHIP_MMAP_PCM_URBS; | |
670 | usX2Y_pcms_unlock(card); | |
671 | return err; | |
672 | } | |
673 | ||
674 | ||
675 | static void snd_usX2Y_hwdep_pcm_vm_open(struct vm_area_struct *area) | |
676 | { | |
677 | } | |
678 | ||
679 | ||
680 | static void snd_usX2Y_hwdep_pcm_vm_close(struct vm_area_struct *area) | |
681 | { | |
682 | } | |
683 | ||
684 | ||
685 | static struct page * snd_usX2Y_hwdep_pcm_vm_nopage(struct vm_area_struct *area, unsigned long address, int *type) | |
686 | { | |
687 | unsigned long offset; | |
688 | struct page *page; | |
689 | void *vaddr; | |
690 | ||
691 | offset = area->vm_pgoff << PAGE_SHIFT; | |
692 | offset += address - area->vm_start; | |
693 | snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM); | |
694 | vaddr = (char*)((usX2Ydev_t*)area->vm_private_data)->hwdep_pcm_shm + offset; | |
695 | page = virt_to_page(vaddr); | |
696 | ||
697 | if (type) | |
698 | *type = VM_FAULT_MINOR; | |
699 | ||
700 | return page; | |
701 | } | |
702 | ||
703 | ||
704 | static struct vm_operations_struct snd_usX2Y_hwdep_pcm_vm_ops = { | |
705 | .open = snd_usX2Y_hwdep_pcm_vm_open, | |
706 | .close = snd_usX2Y_hwdep_pcm_vm_close, | |
707 | .nopage = snd_usX2Y_hwdep_pcm_vm_nopage, | |
708 | }; | |
709 | ||
710 | ||
711 | static int snd_usX2Y_hwdep_pcm_mmap(snd_hwdep_t * hw, struct file *filp, struct vm_area_struct *area) | |
712 | { | |
713 | unsigned long size = (unsigned long)(area->vm_end - area->vm_start); | |
714 | usX2Ydev_t *usX2Y = (usX2Ydev_t*)hw->private_data; | |
715 | ||
716 | if (!(((usX2Ydev_t*)hw->private_data)->chip_status & USX2Y_STAT_CHIP_INIT)) | |
717 | return -EBUSY; | |
718 | ||
719 | /* if userspace tries to mmap beyond end of our buffer, fail */ | |
720 | if (size > PAGE_ALIGN(sizeof(snd_usX2Y_hwdep_pcm_shm_t))) { | |
721 | snd_printd("%lu > %lu\n", size, (unsigned long)sizeof(snd_usX2Y_hwdep_pcm_shm_t)); | |
722 | return -EINVAL; | |
723 | } | |
724 | ||
725 | if (!usX2Y->hwdep_pcm_shm) { | |
726 | return -ENODEV; | |
727 | } | |
728 | area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops; | |
729 | area->vm_flags |= VM_RESERVED; | |
730 | snd_printd("vm_flags=0x%lX\n", area->vm_flags); | |
731 | area->vm_private_data = hw->private_data; | |
732 | return 0; | |
733 | } | |
734 | ||
735 | ||
736 | static void snd_usX2Y_hwdep_pcm_private_free(snd_hwdep_t *hwdep) | |
737 | { | |
738 | usX2Ydev_t *usX2Y = (usX2Ydev_t *)hwdep->private_data; | |
739 | if (NULL != usX2Y->hwdep_pcm_shm) | |
740 | snd_free_pages(usX2Y->hwdep_pcm_shm, sizeof(snd_usX2Y_hwdep_pcm_shm_t)); | |
741 | } | |
742 | ||
743 | ||
744 | static void snd_usX2Y_usbpcm_private_free(snd_pcm_t *pcm) | |
745 | { | |
746 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
747 | } | |
748 | ||
749 | ||
750 | int usX2Y_hwdep_pcm_new(snd_card_t* card) | |
751 | { | |
752 | int err; | |
753 | snd_hwdep_t *hw; | |
754 | snd_pcm_t *pcm; | |
755 | struct usb_device *dev = usX2Y(card)->chip.dev; | |
756 | if (1 != nr_of_packs()) | |
757 | return 0; | |
758 | ||
759 | if ((err = snd_hwdep_new(card, SND_USX2Y_USBPCM_ID, 1, &hw)) < 0) { | |
760 | snd_printd("\n"); | |
761 | return err; | |
762 | } | |
763 | hw->iface = SNDRV_HWDEP_IFACE_USX2Y_PCM; | |
764 | hw->private_data = usX2Y(card); | |
765 | hw->private_free = snd_usX2Y_hwdep_pcm_private_free; | |
766 | hw->ops.open = snd_usX2Y_hwdep_pcm_open; | |
767 | hw->ops.release = snd_usX2Y_hwdep_pcm_release; | |
768 | hw->ops.mmap = snd_usX2Y_hwdep_pcm_mmap; | |
769 | hw->exclusive = 1; | |
770 | sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm", dev->bus->busnum, dev->devnum); | |
771 | ||
772 | err = snd_pcm_new(card, NAME_ALLCAPS" hwdep Audio", 2, 1, 1, &pcm); | |
773 | if (err < 0) { | |
774 | return err; | |
775 | } | |
776 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_usbpcm_ops); | |
777 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_usbpcm_ops); | |
778 | ||
779 | pcm->private_data = usX2Y(card)->subs; | |
780 | pcm->private_free = snd_usX2Y_usbpcm_private_free; | |
781 | pcm->info_flags = 0; | |
782 | ||
783 | sprintf(pcm->name, NAME_ALLCAPS" hwdep Audio"); | |
784 | if (0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream, | |
785 | SNDRV_DMA_TYPE_CONTINUOUS, | |
786 | snd_dma_continuous_data(GFP_KERNEL), | |
787 | 64*1024, 128*1024)) || | |
788 | 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream, | |
789 | SNDRV_DMA_TYPE_CONTINUOUS, | |
790 | snd_dma_continuous_data(GFP_KERNEL), | |
791 | 64*1024, 128*1024))) { | |
792 | snd_usX2Y_usbpcm_private_free(pcm); | |
793 | return err; | |
794 | } | |
795 | ||
796 | ||
797 | return 0; | |
798 | } | |
799 | ||
800 | #else | |
801 | ||
802 | int usX2Y_hwdep_pcm_new(snd_card_t* card) | |
803 | { | |
804 | return 0; | |
805 | } | |
806 | ||
807 | #endif |