]>
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. | |
25985edc | 23 | The pair uses a hardware dependent alsa-device for mmaped pcm transport. |
1da177e4 LT |
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). | |
fa2eb005 | 39 | |
1da177e4 | 40 | This is a first "proof of concept" implementation. |
25985edc | 41 | Later, functionalities should migrate to more appropriate places: |
1da177e4 LT |
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 | ||
b27c187f | 53 | #include <linux/delay.h> |
5a0e3ad6 | 54 | #include <linux/gfp.h> |
1da177e4 LT |
55 | #include "usbusx2yaudio.c" |
56 | ||
1d2019fb | 57 | #if defined(USX2Y_NRPACKS_VARIABLE) || USX2Y_NRPACKS == 1 |
1da177e4 LT |
58 | |
59 | #include <sound/hwdep.h> | |
60 | ||
61 | ||
bbe85bbd | 62 | static int usX2Y_usbpcm_urb_capt_retire(struct snd_usX2Y_substream *subs) |
1da177e4 LT |
63 | { |
64 | struct urb *urb = subs->completed_urb; | |
bbe85bbd | 65 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; |
1da177e4 | 66 | int i, lens = 0, hwptr_done = subs->hwptr_done; |
bbe85bbd | 67 | struct usX2Ydev *usX2Y = subs->usX2Y; |
1da177e4 LT |
68 | if (0 > usX2Y->hwdep_pcm_shm->capture_iso_start) { //FIXME |
69 | int head = usX2Y->hwdep_pcm_shm->captured_iso_head + 1; | |
70 | if (head >= ARRAY_SIZE(usX2Y->hwdep_pcm_shm->captured_iso)) | |
71 | head = 0; | |
72 | usX2Y->hwdep_pcm_shm->capture_iso_start = head; | |
73 | snd_printdd("cap start %i\n", head); | |
74 | } | |
75 | for (i = 0; i < nr_of_packs(); i++) { | |
76 | if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */ | |
d3d579f8 | 77 | snd_printk(KERN_ERR "activ frame status %i. Most propably some hardware problem.\n", urb->iso_frame_desc[i].status); |
1da177e4 LT |
78 | return urb->iso_frame_desc[i].status; |
79 | } | |
80 | lens += urb->iso_frame_desc[i].actual_length / usX2Y->stride; | |
81 | } | |
82 | if ((hwptr_done += lens) >= runtime->buffer_size) | |
83 | hwptr_done -= runtime->buffer_size; | |
84 | subs->hwptr_done = hwptr_done; | |
85 | subs->transfer_done += lens; | |
86 | /* update the pointer, call callback if necessary */ | |
87 | if (subs->transfer_done >= runtime->period_size) { | |
88 | subs->transfer_done -= runtime->period_size; | |
89 | snd_pcm_period_elapsed(subs->pcm_substream); | |
90 | } | |
91 | return 0; | |
92 | } | |
93 | ||
bbe85bbd TI |
94 | static inline int usX2Y_iso_frames_per_buffer(struct snd_pcm_runtime *runtime, |
95 | struct usX2Ydev * usX2Y) | |
1da177e4 LT |
96 | { |
97 | return (runtime->buffer_size * 1000) / usX2Y->rate + 1; //FIXME: so far only correct period_size == 2^x ? | |
98 | } | |
99 | ||
100 | /* | |
101 | * prepare urb for playback data pipe | |
102 | * | |
103 | * we copy the data directly from the pcm buffer. | |
104 | * the current position to be copied is held in hwptr field. | |
105 | * since a urb can handle only a single linear buffer, if the total | |
106 | * transferred area overflows the buffer boundary, we cannot send | |
107 | * it directly from the buffer. thus the data is once copied to | |
108 | * a temporary buffer and urb points to that. | |
109 | */ | |
bbe85bbd TI |
110 | static int usX2Y_hwdep_urb_play_prepare(struct snd_usX2Y_substream *subs, |
111 | struct urb *urb) | |
1da177e4 LT |
112 | { |
113 | int count, counts, pack; | |
bbe85bbd | 114 | struct usX2Ydev *usX2Y = subs->usX2Y; |
1da177e4 | 115 | struct snd_usX2Y_hwdep_pcm_shm *shm = usX2Y->hwdep_pcm_shm; |
bbe85bbd | 116 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; |
1da177e4 LT |
117 | |
118 | if (0 > shm->playback_iso_start) { | |
119 | shm->playback_iso_start = shm->captured_iso_head - | |
120 | usX2Y_iso_frames_per_buffer(runtime, usX2Y); | |
121 | if (0 > shm->playback_iso_start) | |
122 | shm->playback_iso_start += ARRAY_SIZE(shm->captured_iso); | |
123 | shm->playback_iso_head = shm->playback_iso_start; | |
124 | } | |
125 | ||
126 | count = 0; | |
127 | for (pack = 0; pack < nr_of_packs(); pack++) { | |
128 | /* calculate the size of a packet */ | |
129 | counts = shm->captured_iso[shm->playback_iso_head].length / usX2Y->stride; | |
130 | if (counts < 43 || counts > 50) { | |
d3d579f8 | 131 | snd_printk(KERN_ERR "should not be here with counts=%i\n", counts); |
1da177e4 LT |
132 | return -EPIPE; |
133 | } | |
134 | /* set up descriptor */ | |
135 | urb->iso_frame_desc[pack].offset = shm->captured_iso[shm->playback_iso_head].offset; | |
136 | urb->iso_frame_desc[pack].length = shm->captured_iso[shm->playback_iso_head].length; | |
137 | if (atomic_read(&subs->state) != state_RUNNING) | |
138 | memset((char *)urb->transfer_buffer + urb->iso_frame_desc[pack].offset, 0, | |
139 | urb->iso_frame_desc[pack].length); | |
140 | if (++shm->playback_iso_head >= ARRAY_SIZE(shm->captured_iso)) | |
141 | shm->playback_iso_head = 0; | |
142 | count += counts; | |
143 | } | |
144 | urb->transfer_buffer_length = count * usX2Y->stride; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | ||
bbe85bbd TI |
149 | static inline void usX2Y_usbpcm_urb_capt_iso_advance(struct snd_usX2Y_substream *subs, |
150 | struct urb *urb) | |
1da177e4 LT |
151 | { |
152 | int pack; | |
153 | for (pack = 0; pack < nr_of_packs(); ++pack) { | |
154 | struct usb_iso_packet_descriptor *desc = urb->iso_frame_desc + pack; | |
155 | if (NULL != subs) { | |
bbe85bbd | 156 | struct snd_usX2Y_hwdep_pcm_shm *shm = subs->usX2Y->hwdep_pcm_shm; |
1da177e4 LT |
157 | int head = shm->captured_iso_head + 1; |
158 | if (head >= ARRAY_SIZE(shm->captured_iso)) | |
159 | head = 0; | |
160 | shm->captured_iso[head].frame = urb->start_frame + pack; | |
161 | shm->captured_iso[head].offset = desc->offset; | |
162 | shm->captured_iso[head].length = desc->actual_length; | |
163 | shm->captured_iso_head = head; | |
164 | shm->captured_iso_frames++; | |
165 | } | |
166 | if ((desc->offset += desc->length * NRURBS*nr_of_packs()) + | |
167 | desc->length >= SSS) | |
168 | desc->offset -= (SSS - desc->length); | |
169 | } | |
170 | } | |
171 | ||
bbe85bbd TI |
172 | static inline int usX2Y_usbpcm_usbframe_complete(struct snd_usX2Y_substream *capsubs, |
173 | struct snd_usX2Y_substream *capsubs2, | |
174 | struct snd_usX2Y_substream *playbacksubs, | |
175 | int frame) | |
1da177e4 LT |
176 | { |
177 | int err, state; | |
178 | struct urb *urb = playbacksubs->completed_urb; | |
179 | ||
180 | state = atomic_read(&playbacksubs->state); | |
181 | if (NULL != urb) { | |
182 | if (state == state_RUNNING) | |
183 | usX2Y_urb_play_retire(playbacksubs, urb); | |
cb432379 TI |
184 | else if (state >= state_PRERUNNING) |
185 | atomic_inc(&playbacksubs->state); | |
1da177e4 LT |
186 | } else { |
187 | switch (state) { | |
188 | case state_STARTING1: | |
189 | urb = playbacksubs->urb[0]; | |
190 | atomic_inc(&playbacksubs->state); | |
191 | break; | |
192 | case state_STARTING2: | |
193 | urb = playbacksubs->urb[1]; | |
194 | atomic_inc(&playbacksubs->state); | |
195 | break; | |
196 | } | |
197 | } | |
198 | if (urb) { | |
199 | if ((err = usX2Y_hwdep_urb_play_prepare(playbacksubs, urb)) || | |
200 | (err = usX2Y_urb_submit(playbacksubs, urb, frame))) { | |
201 | return err; | |
202 | } | |
203 | } | |
204 | ||
205 | playbacksubs->completed_urb = NULL; | |
206 | ||
207 | state = atomic_read(&capsubs->state); | |
208 | if (state >= state_PREPARED) { | |
209 | if (state == state_RUNNING) { | |
210 | if ((err = usX2Y_usbpcm_urb_capt_retire(capsubs))) | |
211 | return err; | |
cb432379 TI |
212 | } else if (state >= state_PRERUNNING) |
213 | atomic_inc(&capsubs->state); | |
1da177e4 LT |
214 | usX2Y_usbpcm_urb_capt_iso_advance(capsubs, capsubs->completed_urb); |
215 | if (NULL != capsubs2) | |
216 | usX2Y_usbpcm_urb_capt_iso_advance(NULL, capsubs2->completed_urb); | |
217 | if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame))) | |
218 | return err; | |
219 | if (NULL != capsubs2) | |
220 | if ((err = usX2Y_urb_submit(capsubs2, capsubs2->completed_urb, frame))) | |
221 | return err; | |
222 | } | |
223 | capsubs->completed_urb = NULL; | |
224 | if (NULL != capsubs2) | |
225 | capsubs2->completed_urb = NULL; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | ||
7d12e780 | 230 | static void i_usX2Y_usbpcm_urb_complete(struct urb *urb) |
1da177e4 | 231 | { |
bbe85bbd TI |
232 | struct snd_usX2Y_substream *subs = urb->context; |
233 | struct usX2Ydev *usX2Y = subs->usX2Y; | |
234 | struct snd_usX2Y_substream *capsubs, *capsubs2, *playbacksubs; | |
1da177e4 LT |
235 | |
236 | if (unlikely(atomic_read(&subs->state) < state_PREPARED)) { | |
bbe85bbd | 237 | snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", |
a014bbad | 238 | usb_get_current_frame_number(usX2Y->dev), |
bbe85bbd TI |
239 | subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", |
240 | urb->status, urb->start_frame); | |
1da177e4 LT |
241 | return; |
242 | } | |
243 | if (unlikely(urb->status)) { | |
244 | usX2Y_error_urb_status(usX2Y, subs, urb); | |
245 | return; | |
246 | } | |
bc6191b1 | 247 | if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF))) |
1da177e4 LT |
248 | subs->completed_urb = urb; |
249 | else { | |
250 | usX2Y_error_sequence(usX2Y, subs, urb); | |
251 | return; | |
252 | } | |
253 | ||
254 | capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; | |
255 | capsubs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2]; | |
256 | playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; | |
257 | if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED && | |
258 | (NULL == capsubs2 || capsubs2->completed_urb) && | |
259 | (playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) { | |
635bbb35 KW |
260 | if (!usX2Y_usbpcm_usbframe_complete(capsubs, capsubs2, playbacksubs, urb->start_frame)) |
261 | usX2Y->wait_iso_frame += nr_of_packs(); | |
262 | else { | |
1da177e4 LT |
263 | snd_printdd("\n"); |
264 | usX2Y_clients_stop(usX2Y); | |
265 | } | |
266 | } | |
267 | } | |
268 | ||
269 | ||
bbe85bbd | 270 | static void usX2Y_hwdep_urb_release(struct urb **urb) |
1da177e4 LT |
271 | { |
272 | usb_kill_urb(*urb); | |
273 | usb_free_urb(*urb); | |
274 | *urb = NULL; | |
275 | } | |
276 | ||
277 | /* | |
278 | * release a substream | |
279 | */ | |
bbe85bbd | 280 | static void usX2Y_usbpcm_urbs_release(struct snd_usX2Y_substream *subs) |
1da177e4 LT |
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 | ||
bbe85bbd | 288 | static void usX2Y_usbpcm_subs_startup_finish(struct usX2Ydev * usX2Y) |
1da177e4 LT |
289 | { |
290 | usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_urb_complete); | |
291 | usX2Y->prepare_subs = NULL; | |
292 | } | |
293 | ||
7d12e780 | 294 | static void i_usX2Y_usbpcm_subs_startup(struct urb *urb) |
1da177e4 | 295 | { |
bbe85bbd TI |
296 | struct snd_usX2Y_substream *subs = urb->context; |
297 | struct usX2Ydev *usX2Y = subs->usX2Y; | |
298 | struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs; | |
1da177e4 LT |
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]) { | |
bbe85bbd | 303 | struct snd_usX2Y_substream *cap_subs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2]; |
1da177e4 LT |
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 | ||
7d12e780 | 311 | i_usX2Y_usbpcm_urb_complete(urb); |
1da177e4 LT |
312 | } |
313 | ||
314 | /* | |
315 | * initialize a substream's urbs | |
316 | */ | |
bbe85bbd | 317 | static int usX2Y_usbpcm_urbs_allocate(struct snd_usX2Y_substream *subs) |
1da177e4 LT |
318 | { |
319 | int i; | |
320 | unsigned int pipe; | |
321 | int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; | |
a014bbad | 322 | struct usb_device *dev = subs->usX2Y->dev; |
1da177e4 LT |
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++) { | |
cb432379 | 332 | struct urb **purb = subs->urb + i; |
1da177e4 LT |
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 | */ | |
bbe85bbd | 361 | static int snd_usX2Y_usbpcm_hw_free(struct snd_pcm_substream *substream) |
1da177e4 | 362 | { |
bbe85bbd TI |
363 | struct snd_pcm_runtime *runtime = substream->runtime; |
364 | struct snd_usX2Y_substream *subs = runtime->private_data, | |
1da177e4 | 365 | *cap_subs2 = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2]; |
12aa7579 | 366 | mutex_lock(&subs->usX2Y->prepare_mutex); |
1da177e4 LT |
367 | snd_printdd("snd_usX2Y_usbpcm_hw_free(%p)\n", substream); |
368 | ||
369 | if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) { | |
bbe85bbd | 370 | struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; |
1da177e4 LT |
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 { | |
bbe85bbd | 385 | struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; |
1da177e4 LT |
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 | } | |
12aa7579 | 395 | mutex_unlock(&subs->usX2Y->prepare_mutex); |
1da177e4 LT |
396 | return snd_pcm_lib_free_pages(substream); |
397 | } | |
398 | ||
bbe85bbd | 399 | static void usX2Y_usbpcm_subs_startup(struct snd_usX2Y_substream *subs) |
1da177e4 | 400 | { |
bbe85bbd | 401 | struct usX2Ydev * usX2Y = subs->usX2Y; |
1da177e4 LT |
402 | usX2Y->prepare_subs = subs; |
403 | subs->urb[0]->start_frame = -1; | |
7f927fcc | 404 | smp_wmb(); // Make sure above modifications are seen by i_usX2Y_subs_startup() |
1da177e4 LT |
405 | usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_subs_startup); |
406 | } | |
407 | ||
bbe85bbd | 408 | static int usX2Y_usbpcm_urbs_start(struct snd_usX2Y_substream *subs) |
1da177e4 LT |
409 | { |
410 | int p, u, err, | |
411 | stream = subs->pcm_substream->stream; | |
bbe85bbd | 412 | struct usX2Ydev *usX2Y = subs->usX2Y; |
1da177e4 LT |
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) { | |
bbe85bbd | 420 | struct snd_usX2Y_substream *subs = usX2Y->subs[stream + p]; |
1da177e4 LT |
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++) { | |
bbe85bbd | 429 | struct snd_usX2Y_substream *subs = usX2Y->subs[p]; |
1da177e4 LT |
430 | if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED) |
431 | goto start; | |
432 | } | |
1da177e4 LT |
433 | |
434 | start: | |
435 | usX2Y_usbpcm_subs_startup(subs); | |
436 | for (u = 0; u < NRURBS; u++) { | |
437 | for (p = 0; 3 >= (stream + p); p += 2) { | |
bbe85bbd | 438 | struct snd_usX2Y_substream *subs = usX2Y->subs[stream + p]; |
1da177e4 LT |
439 | if (subs != NULL) { |
440 | struct urb *urb = subs->urb[u]; | |
441 | if (usb_pipein(urb->pipe)) { | |
442 | unsigned long pack; | |
443 | if (0 == u) | |
444 | atomic_set(&subs->state, state_STARTING3); | |
a014bbad | 445 | urb->dev = usX2Y->dev; |
1da177e4 LT |
446 | urb->transfer_flags = URB_ISO_ASAP; |
447 | for (pack = 0; pack < nr_of_packs(); pack++) { | |
448 | urb->iso_frame_desc[pack].offset = subs->maxpacksize * (pack + u * nr_of_packs()); | |
449 | urb->iso_frame_desc[pack].length = subs->maxpacksize; | |
450 | } | |
451 | urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); | |
452 | if ((err = usb_submit_urb(urb, GFP_KERNEL)) < 0) { | |
453 | snd_printk (KERN_ERR "cannot usb_submit_urb() for urb %d, err = %d\n", u, err); | |
454 | err = -EPIPE; | |
455 | goto cleanup; | |
456 | } else { | |
457 | snd_printdd("%i\n", urb->start_frame); | |
635bbb35 | 458 | if (u == 0) |
1da177e4 LT |
459 | usX2Y->wait_iso_frame = urb->start_frame; |
460 | } | |
461 | urb->transfer_flags = 0; | |
462 | } else { | |
463 | atomic_set(&subs->state, state_STARTING1); | |
464 | break; | |
465 | } | |
466 | } | |
467 | } | |
468 | } | |
469 | err = 0; | |
470 | wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs); | |
471 | if (atomic_read(&subs->state) != state_PREPARED) | |
472 | err = -EPIPE; | |
473 | ||
474 | cleanup: | |
475 | if (err) { | |
476 | usX2Y_subs_startup_finish(usX2Y); // Call it now | |
477 | usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything | |
478 | } | |
479 | return err; | |
480 | } | |
481 | ||
482 | /* | |
483 | * prepare callback | |
484 | * | |
485 | * set format and initialize urbs | |
486 | */ | |
bbe85bbd | 487 | static int snd_usX2Y_usbpcm_prepare(struct snd_pcm_substream *substream) |
1da177e4 | 488 | { |
bbe85bbd TI |
489 | struct snd_pcm_runtime *runtime = substream->runtime; |
490 | struct snd_usX2Y_substream *subs = runtime->private_data; | |
491 | struct usX2Ydev *usX2Y = subs->usX2Y; | |
492 | struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; | |
1da177e4 LT |
493 | int err = 0; |
494 | snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream); | |
495 | ||
496 | if (NULL == usX2Y->hwdep_pcm_shm) { | |
bbe85bbd | 497 | if (NULL == (usX2Y->hwdep_pcm_shm = snd_malloc_pages(sizeof(struct snd_usX2Y_hwdep_pcm_shm), GFP_KERNEL))) |
1da177e4 | 498 | return -ENOMEM; |
bbe85bbd | 499 | memset(usX2Y->hwdep_pcm_shm, 0, sizeof(struct snd_usX2Y_hwdep_pcm_shm)); |
1da177e4 LT |
500 | } |
501 | ||
12aa7579 | 502 | mutex_lock(&usX2Y->prepare_mutex); |
1da177e4 LT |
503 | usX2Y_subs_prepare(subs); |
504 | // Start hardware streams | |
505 | // SyncStream first.... | |
506 | if (atomic_read(&capsubs->state) < state_PREPARED) { | |
507 | if (usX2Y->format != runtime->format) | |
508 | if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0) | |
509 | goto up_prepare_mutex; | |
510 | if (usX2Y->rate != runtime->rate) | |
511 | if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0) | |
512 | goto up_prepare_mutex; | |
bbe85bbd TI |
513 | snd_printdd("starting capture pipe for %s\n", subs == capsubs ? |
514 | "self" : "playpipe"); | |
1da177e4 LT |
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) { | |
bbe85bbd TI |
522 | while (usX2Y_iso_frames_per_buffer(runtime, usX2Y) > |
523 | usX2Y->hwdep_pcm_shm->captured_iso_frames) { | |
524 | snd_printdd("Wait: iso_frames_per_buffer=%i," | |
525 | "captured_iso_frames=%i\n", | |
526 | usX2Y_iso_frames_per_buffer(runtime, usX2Y), | |
527 | usX2Y->hwdep_pcm_shm->captured_iso_frames); | |
b27c187f | 528 | if (msleep_interruptible(10)) { |
1da177e4 LT |
529 | err = -ERESTARTSYS; |
530 | goto up_prepare_mutex; | |
531 | } | |
532 | } | |
533 | if (0 > (err = usX2Y_usbpcm_urbs_start(subs))) | |
534 | goto up_prepare_mutex; | |
535 | } | |
bbe85bbd TI |
536 | snd_printdd("Ready: iso_frames_per_buffer=%i,captured_iso_frames=%i\n", |
537 | usX2Y_iso_frames_per_buffer(runtime, usX2Y), | |
538 | usX2Y->hwdep_pcm_shm->captured_iso_frames); | |
1da177e4 LT |
539 | } else |
540 | usX2Y->hwdep_pcm_shm->capture_iso_start = -1; | |
541 | ||
542 | up_prepare_mutex: | |
12aa7579 | 543 | mutex_unlock(&usX2Y->prepare_mutex); |
1da177e4 LT |
544 | return err; |
545 | } | |
546 | ||
bbe85bbd | 547 | static struct snd_pcm_hardware snd_usX2Y_4c = |
1da177e4 LT |
548 | { |
549 | .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | | |
550 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
551 | SNDRV_PCM_INFO_MMAP_VALID), | |
552 | .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE, | |
553 | .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, | |
554 | .rate_min = 44100, | |
555 | .rate_max = 48000, | |
556 | .channels_min = 2, | |
557 | .channels_max = 4, | |
558 | .buffer_bytes_max = (2*128*1024), | |
559 | .period_bytes_min = 64, | |
560 | .period_bytes_max = (128*1024), | |
561 | .periods_min = 2, | |
562 | .periods_max = 1024, | |
563 | .fifo_size = 0 | |
564 | }; | |
565 | ||
566 | ||
567 | ||
bbe85bbd | 568 | static int snd_usX2Y_usbpcm_open(struct snd_pcm_substream *substream) |
1da177e4 | 569 | { |
bbe85bbd | 570 | struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **) |
1da177e4 | 571 | snd_pcm_substream_chip(substream))[substream->stream]; |
bbe85bbd | 572 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
573 | |
574 | if (!(subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)) | |
575 | return -EBUSY; | |
576 | ||
577 | runtime->hw = SNDRV_PCM_STREAM_PLAYBACK == substream->stream ? snd_usX2Y_2c : | |
578 | (subs->usX2Y->subs[3] ? snd_usX2Y_4c : snd_usX2Y_2c); | |
579 | runtime->private_data = subs; | |
580 | subs->pcm_substream = substream; | |
581 | snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000); | |
582 | return 0; | |
583 | } | |
584 | ||
585 | ||
bbe85bbd | 586 | static int snd_usX2Y_usbpcm_close(struct snd_pcm_substream *substream) |
1da177e4 | 587 | { |
bbe85bbd TI |
588 | struct snd_pcm_runtime *runtime = substream->runtime; |
589 | struct snd_usX2Y_substream *subs = runtime->private_data; | |
cb432379 | 590 | |
1da177e4 | 591 | subs->pcm_substream = NULL; |
cb432379 | 592 | return 0; |
1da177e4 LT |
593 | } |
594 | ||
595 | ||
bbe85bbd | 596 | static struct snd_pcm_ops snd_usX2Y_usbpcm_ops = |
1da177e4 LT |
597 | { |
598 | .open = snd_usX2Y_usbpcm_open, | |
599 | .close = snd_usX2Y_usbpcm_close, | |
600 | .ioctl = snd_pcm_lib_ioctl, | |
601 | .hw_params = snd_usX2Y_pcm_hw_params, | |
602 | .hw_free = snd_usX2Y_usbpcm_hw_free, | |
603 | .prepare = snd_usX2Y_usbpcm_prepare, | |
604 | .trigger = snd_usX2Y_pcm_trigger, | |
605 | .pointer = snd_usX2Y_pcm_pointer, | |
606 | }; | |
607 | ||
608 | ||
bbe85bbd | 609 | static int usX2Y_pcms_lock_check(struct snd_card *card) |
1da177e4 LT |
610 | { |
611 | struct list_head *list; | |
bbe85bbd TI |
612 | struct snd_device *dev; |
613 | struct snd_pcm *pcm; | |
1da177e4 LT |
614 | int err = 0; |
615 | list_for_each(list, &card->devices) { | |
616 | dev = snd_device(list); | |
617 | if (dev->type != SNDRV_DEV_PCM) | |
618 | continue; | |
619 | pcm = dev->device_data; | |
12aa7579 | 620 | mutex_lock(&pcm->open_mutex); |
1da177e4 LT |
621 | } |
622 | list_for_each(list, &card->devices) { | |
623 | int s; | |
624 | dev = snd_device(list); | |
625 | if (dev->type != SNDRV_DEV_PCM) | |
626 | continue; | |
627 | pcm = dev->device_data; | |
628 | for (s = 0; s < 2; ++s) { | |
bbe85bbd | 629 | struct snd_pcm_substream *substream; |
1da177e4 | 630 | substream = pcm->streams[s].substream; |
9b08c2aa | 631 | if (substream && SUBSTREAM_BUSY(substream)) |
1da177e4 LT |
632 | err = -EBUSY; |
633 | } | |
634 | } | |
635 | return err; | |
636 | } | |
637 | ||
638 | ||
bbe85bbd | 639 | static void usX2Y_pcms_unlock(struct snd_card *card) |
1da177e4 LT |
640 | { |
641 | struct list_head *list; | |
bbe85bbd TI |
642 | struct snd_device *dev; |
643 | struct snd_pcm *pcm; | |
1da177e4 LT |
644 | list_for_each(list, &card->devices) { |
645 | dev = snd_device(list); | |
646 | if (dev->type != SNDRV_DEV_PCM) | |
647 | continue; | |
648 | pcm = dev->device_data; | |
12aa7579 | 649 | mutex_unlock(&pcm->open_mutex); |
1da177e4 LT |
650 | } |
651 | } | |
652 | ||
653 | ||
bbe85bbd | 654 | static int snd_usX2Y_hwdep_pcm_open(struct snd_hwdep *hw, struct file *file) |
1da177e4 LT |
655 | { |
656 | // we need to be the first | |
bbe85bbd | 657 | struct snd_card *card = hw->card; |
1da177e4 LT |
658 | int err = usX2Y_pcms_lock_check(card); |
659 | if (0 == err) | |
660 | usX2Y(card)->chip_status |= USX2Y_STAT_CHIP_MMAP_PCM_URBS; | |
661 | usX2Y_pcms_unlock(card); | |
662 | return err; | |
663 | } | |
664 | ||
665 | ||
bbe85bbd | 666 | static int snd_usX2Y_hwdep_pcm_release(struct snd_hwdep *hw, struct file *file) |
1da177e4 | 667 | { |
bbe85bbd | 668 | struct snd_card *card = hw->card; |
1da177e4 LT |
669 | int err = usX2Y_pcms_lock_check(card); |
670 | if (0 == err) | |
671 | usX2Y(hw->card)->chip_status &= ~USX2Y_STAT_CHIP_MMAP_PCM_URBS; | |
672 | usX2Y_pcms_unlock(card); | |
673 | return err; | |
674 | } | |
675 | ||
676 | ||
677 | static void snd_usX2Y_hwdep_pcm_vm_open(struct vm_area_struct *area) | |
678 | { | |
679 | } | |
680 | ||
681 | ||
682 | static void snd_usX2Y_hwdep_pcm_vm_close(struct vm_area_struct *area) | |
683 | { | |
684 | } | |
685 | ||
686 | ||
eb415b8f NP |
687 | static int snd_usX2Y_hwdep_pcm_vm_fault(struct vm_area_struct *area, |
688 | struct vm_fault *vmf) | |
1da177e4 LT |
689 | { |
690 | unsigned long offset; | |
1da177e4 LT |
691 | void *vaddr; |
692 | ||
eb415b8f | 693 | offset = vmf->pgoff << PAGE_SHIFT; |
bbe85bbd | 694 | vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->hwdep_pcm_shm + offset; |
eb415b8f NP |
695 | vmf->page = virt_to_page(vaddr); |
696 | get_page(vmf->page); | |
697 | return 0; | |
1da177e4 LT |
698 | } |
699 | ||
700 | ||
f0f37e2f | 701 | static const struct vm_operations_struct snd_usX2Y_hwdep_pcm_vm_ops = { |
1da177e4 LT |
702 | .open = snd_usX2Y_hwdep_pcm_vm_open, |
703 | .close = snd_usX2Y_hwdep_pcm_vm_close, | |
eb415b8f | 704 | .fault = snd_usX2Y_hwdep_pcm_vm_fault, |
1da177e4 LT |
705 | }; |
706 | ||
707 | ||
bbe85bbd | 708 | static int snd_usX2Y_hwdep_pcm_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area) |
1da177e4 LT |
709 | { |
710 | unsigned long size = (unsigned long)(area->vm_end - area->vm_start); | |
bbe85bbd | 711 | struct usX2Ydev *usX2Y = hw->private_data; |
1da177e4 | 712 | |
cb432379 | 713 | if (!(usX2Y->chip_status & USX2Y_STAT_CHIP_INIT)) |
1da177e4 LT |
714 | return -EBUSY; |
715 | ||
716 | /* if userspace tries to mmap beyond end of our buffer, fail */ | |
bbe85bbd TI |
717 | if (size > PAGE_ALIGN(sizeof(struct snd_usX2Y_hwdep_pcm_shm))) { |
718 | snd_printd("%lu > %lu\n", size, (unsigned long)sizeof(struct snd_usX2Y_hwdep_pcm_shm)); | |
1da177e4 LT |
719 | return -EINVAL; |
720 | } | |
721 | ||
722 | if (!usX2Y->hwdep_pcm_shm) { | |
723 | return -ENODEV; | |
724 | } | |
725 | area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops; | |
2f98735c | 726 | area->vm_flags |= VM_RESERVED | VM_DONTEXPAND; |
1da177e4 LT |
727 | area->vm_private_data = hw->private_data; |
728 | return 0; | |
729 | } | |
730 | ||
731 | ||
bbe85bbd | 732 | static void snd_usX2Y_hwdep_pcm_private_free(struct snd_hwdep *hwdep) |
1da177e4 | 733 | { |
bbe85bbd | 734 | struct usX2Ydev *usX2Y = hwdep->private_data; |
1da177e4 | 735 | if (NULL != usX2Y->hwdep_pcm_shm) |
bbe85bbd | 736 | snd_free_pages(usX2Y->hwdep_pcm_shm, sizeof(struct snd_usX2Y_hwdep_pcm_shm)); |
1da177e4 LT |
737 | } |
738 | ||
739 | ||
bbe85bbd | 740 | int usX2Y_hwdep_pcm_new(struct snd_card *card) |
1da177e4 LT |
741 | { |
742 | int err; | |
bbe85bbd TI |
743 | struct snd_hwdep *hw; |
744 | struct snd_pcm *pcm; | |
a014bbad | 745 | struct usb_device *dev = usX2Y(card)->dev; |
1da177e4 LT |
746 | if (1 != nr_of_packs()) |
747 | return 0; | |
748 | ||
cb432379 | 749 | if ((err = snd_hwdep_new(card, SND_USX2Y_USBPCM_ID, 1, &hw)) < 0) |
1da177e4 | 750 | return err; |
cb432379 | 751 | |
1da177e4 LT |
752 | hw->iface = SNDRV_HWDEP_IFACE_USX2Y_PCM; |
753 | hw->private_data = usX2Y(card); | |
754 | hw->private_free = snd_usX2Y_hwdep_pcm_private_free; | |
755 | hw->ops.open = snd_usX2Y_hwdep_pcm_open; | |
756 | hw->ops.release = snd_usX2Y_hwdep_pcm_release; | |
757 | hw->ops.mmap = snd_usX2Y_hwdep_pcm_mmap; | |
758 | hw->exclusive = 1; | |
759 | sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm", dev->bus->busnum, dev->devnum); | |
760 | ||
761 | err = snd_pcm_new(card, NAME_ALLCAPS" hwdep Audio", 2, 1, 1, &pcm); | |
762 | if (err < 0) { | |
763 | return err; | |
764 | } | |
765 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_usbpcm_ops); | |
766 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_usbpcm_ops); | |
767 | ||
768 | pcm->private_data = usX2Y(card)->subs; | |
1da177e4 LT |
769 | pcm->info_flags = 0; |
770 | ||
771 | sprintf(pcm->name, NAME_ALLCAPS" hwdep Audio"); | |
772 | if (0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream, | |
773 | SNDRV_DMA_TYPE_CONTINUOUS, | |
774 | snd_dma_continuous_data(GFP_KERNEL), | |
775 | 64*1024, 128*1024)) || | |
776 | 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream, | |
777 | SNDRV_DMA_TYPE_CONTINUOUS, | |
778 | snd_dma_continuous_data(GFP_KERNEL), | |
779 | 64*1024, 128*1024))) { | |
1da177e4 LT |
780 | return err; |
781 | } | |
782 | ||
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
787 | #else | |
788 | ||
bbe85bbd | 789 | int usX2Y_hwdep_pcm_new(struct snd_card *card) |
1da177e4 LT |
790 | { |
791 | return 0; | |
792 | } | |
793 | ||
794 | #endif |