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Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
e5779998 | 2 | /* |
e5779998 DM |
3 | */ |
4 | ||
5 | #include <linux/init.h> | |
9966ddaf | 6 | #include <linux/slab.h> |
44dcbbb1 | 7 | #include <linux/bitrev.h> |
edcd3633 | 8 | #include <linux/ratelimit.h> |
e5779998 DM |
9 | #include <linux/usb.h> |
10 | #include <linux/usb/audio.h> | |
7e847894 | 11 | #include <linux/usb/audio-v2.h> |
e5779998 DM |
12 | |
13 | #include <sound/core.h> | |
14 | #include <sound/pcm.h> | |
15 | #include <sound/pcm_params.h> | |
16 | ||
17 | #include "usbaudio.h" | |
18 | #include "card.h" | |
19 | #include "quirks.h" | |
c731bc96 | 20 | #include "endpoint.h" |
e5779998 DM |
21 | #include "helper.h" |
22 | #include "pcm.h" | |
79f920fb | 23 | #include "clock.h" |
88a8516a | 24 | #include "power.h" |
66354f18 | 25 | #include "media.h" |
9fddc15e | 26 | #include "implicit.h" |
e5779998 | 27 | |
edcd3633 DM |
28 | #define SUBSTREAM_FLAG_DATA_EP_STARTED 0 |
29 | #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1 | |
30 | ||
294c4fb8 | 31 | /* return the estimated delay based on USB frame counters */ |
cdebd553 | 32 | static snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs, |
e8a8f09c | 33 | struct snd_pcm_runtime *runtime) |
294c4fb8 | 34 | { |
e8a8f09c TI |
35 | unsigned int current_frame_number; |
36 | unsigned int frame_diff; | |
294c4fb8 | 37 | int est_delay; |
e8a8f09c | 38 | int queued; |
294c4fb8 | 39 | |
e8a8f09c TI |
40 | if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) { |
41 | queued = bytes_to_frames(runtime, subs->inflight_bytes); | |
42 | if (!queued) | |
43 | return 0; | |
44 | } else if (!subs->running) { | |
45 | return 0; | |
46 | } | |
48779a0b | 47 | |
294c4fb8 PLB |
48 | current_frame_number = usb_get_current_frame_number(subs->dev); |
49 | /* | |
50 | * HCD implementations use different widths, use lower 8 bits. | |
51 | * The delay will be managed up to 256ms, which is more than | |
52 | * enough | |
53 | */ | |
54 | frame_diff = (current_frame_number - subs->last_frame_number) & 0xff; | |
55 | ||
56 | /* Approximation based on number of samples per USB frame (ms), | |
57 | some truncation for 44.1 but the estimate is good enough */ | |
e8a8f09c TI |
58 | est_delay = frame_diff * runtime->rate / 1000; |
59 | ||
60 | if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) { | |
61 | est_delay = queued - est_delay; | |
62 | if (est_delay < 0) | |
63 | est_delay = 0; | |
64 | } | |
e4cc6153 | 65 | |
294c4fb8 PLB |
66 | return est_delay; |
67 | } | |
68 | ||
e5779998 DM |
69 | /* |
70 | * return the current pcm pointer. just based on the hwptr_done value. | |
71 | */ | |
72 | static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream) | |
73 | { | |
e8a8f09c TI |
74 | struct snd_pcm_runtime *runtime = substream->runtime; |
75 | struct snd_usb_substream *subs = runtime->private_data; | |
e5779998 DM |
76 | unsigned int hwptr_done; |
77 | ||
47ab1545 | 78 | if (atomic_read(&subs->stream->chip->shutdown)) |
978520b7 | 79 | return SNDRV_PCM_POS_XRUN; |
e5779998 DM |
80 | spin_lock(&subs->lock); |
81 | hwptr_done = subs->hwptr_done; | |
e8a8f09c | 82 | runtime->delay = snd_usb_pcm_delay(subs, runtime); |
e5779998 | 83 | spin_unlock(&subs->lock); |
e8a8f09c | 84 | return bytes_to_frames(runtime, hwptr_done); |
e5779998 DM |
85 | } |
86 | ||
87 | /* | |
88 | * find a matching audio format | |
89 | */ | |
cab941b7 | 90 | static const struct audioformat * |
bf6313a0 TI |
91 | find_format(struct list_head *fmt_list_head, snd_pcm_format_t format, |
92 | unsigned int rate, unsigned int channels, bool strict_match, | |
93 | struct snd_usb_substream *subs) | |
e5779998 | 94 | { |
cab941b7 TI |
95 | const struct audioformat *fp; |
96 | const struct audioformat *found = NULL; | |
e5779998 DM |
97 | int cur_attr = 0, attr; |
98 | ||
5a6c3e11 | 99 | list_for_each_entry(fp, fmt_list_head, list) { |
bf6313a0 TI |
100 | if (strict_match) { |
101 | if (!(fp->formats & pcm_format_to_bits(format))) | |
102 | continue; | |
103 | if (fp->channels != channels) | |
104 | continue; | |
105 | } | |
5a6c3e11 | 106 | if (rate < fp->rate_min || rate > fp->rate_max) |
e5779998 | 107 | continue; |
5a6c3e11 | 108 | if (!(fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) { |
e5779998 DM |
109 | unsigned int i; |
110 | for (i = 0; i < fp->nr_rates; i++) | |
5a6c3e11 | 111 | if (fp->rate_table[i] == rate) |
e5779998 DM |
112 | break; |
113 | if (i >= fp->nr_rates) | |
114 | continue; | |
115 | } | |
116 | attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE; | |
5a6c3e11 | 117 | if (!found) { |
e5779998 DM |
118 | found = fp; |
119 | cur_attr = attr; | |
120 | continue; | |
121 | } | |
122 | /* avoid async out and adaptive in if the other method | |
123 | * supports the same format. | |
124 | * this is a workaround for the case like | |
125 | * M-audio audiophile USB. | |
126 | */ | |
5a6c3e11 | 127 | if (subs && attr != cur_attr) { |
e5779998 DM |
128 | if ((attr == USB_ENDPOINT_SYNC_ASYNC && |
129 | subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || | |
130 | (attr == USB_ENDPOINT_SYNC_ADAPTIVE && | |
131 | subs->direction == SNDRV_PCM_STREAM_CAPTURE)) | |
132 | continue; | |
133 | if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC && | |
134 | subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || | |
135 | (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE && | |
136 | subs->direction == SNDRV_PCM_STREAM_CAPTURE)) { | |
137 | found = fp; | |
138 | cur_attr = attr; | |
139 | continue; | |
140 | } | |
141 | } | |
142 | /* find the format with the largest max. packet size */ | |
143 | if (fp->maxpacksize > found->maxpacksize) { | |
144 | found = fp; | |
145 | cur_attr = attr; | |
146 | } | |
147 | } | |
148 | return found; | |
149 | } | |
150 | ||
cab941b7 | 151 | static const struct audioformat * |
bf6313a0 TI |
152 | find_substream_format(struct snd_usb_substream *subs, |
153 | const struct snd_pcm_hw_params *params) | |
5a6c3e11 | 154 | { |
bf6313a0 TI |
155 | return find_format(&subs->fmt_list, params_format(params), |
156 | params_rate(params), params_channels(params), | |
157 | true, subs); | |
5a6c3e11 TI |
158 | } |
159 | ||
bf6313a0 | 160 | static int init_pitch_v1(struct snd_usb_audio *chip, int ep) |
767d75ad DM |
161 | { |
162 | struct usb_device *dev = chip->dev; | |
767d75ad DM |
163 | unsigned char data[1]; |
164 | int err; | |
165 | ||
767d75ad | 166 | data[0] = 1; |
f25ecf8f TI |
167 | err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, |
168 | USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, | |
169 | UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, | |
170 | data, sizeof(data)); | |
bf6313a0 | 171 | return err; |
767d75ad | 172 | } |
e5779998 | 173 | |
bf6313a0 | 174 | static int init_pitch_v2(struct snd_usb_audio *chip, int ep) |
92c25611 DM |
175 | { |
176 | struct usb_device *dev = chip->dev; | |
177 | unsigned char data[1]; | |
92c25611 DM |
178 | int err; |
179 | ||
92c25611 | 180 | data[0] = 1; |
f25ecf8f TI |
181 | err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, |
182 | USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, | |
183 | UAC2_EP_CS_PITCH << 8, 0, | |
184 | data, sizeof(data)); | |
bf6313a0 | 185 | return err; |
92c25611 DM |
186 | } |
187 | ||
e5779998 | 188 | /* |
92c25611 | 189 | * initialize the pitch control and sample rate |
e5779998 | 190 | */ |
73037c8d | 191 | int snd_usb_init_pitch(struct snd_usb_audio *chip, |
cab941b7 | 192 | const struct audioformat *fmt) |
e5779998 | 193 | { |
bf6313a0 TI |
194 | int err; |
195 | ||
92c25611 DM |
196 | /* if endpoint doesn't have pitch control, bail out */ |
197 | if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) | |
198 | return 0; | |
199 | ||
bf6313a0 TI |
200 | usb_audio_dbg(chip, "enable PITCH for EP 0x%x\n", fmt->endpoint); |
201 | ||
8f898e92 | 202 | switch (fmt->protocol) { |
767d75ad | 203 | case UAC_VERSION_1: |
bf6313a0 TI |
204 | err = init_pitch_v1(chip, fmt->endpoint); |
205 | break; | |
206 | case UAC_VERSION_2: | |
207 | err = init_pitch_v2(chip, fmt->endpoint); | |
208 | break; | |
a2acad82 | 209 | default: |
bf6313a0 TI |
210 | return 0; |
211 | } | |
767d75ad | 212 | |
bf6313a0 TI |
213 | if (err < 0) { |
214 | usb_audio_err(chip, "failed to enable PITCH for EP 0x%x\n", | |
215 | fmt->endpoint); | |
216 | return err; | |
767d75ad | 217 | } |
bf6313a0 TI |
218 | |
219 | return 0; | |
767d75ad DM |
220 | } |
221 | ||
5df4219e | 222 | static bool stop_endpoints(struct snd_usb_substream *subs, bool keep_pending) |
57234bc1 | 223 | { |
bf6313a0 TI |
224 | bool stopped = 0; |
225 | ||
57234bc1 | 226 | if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { |
5df4219e | 227 | snd_usb_endpoint_stop(subs->sync_endpoint, keep_pending); |
bf6313a0 | 228 | stopped = true; |
57234bc1 | 229 | } |
bf6313a0 | 230 | if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { |
5df4219e | 231 | snd_usb_endpoint_stop(subs->data_endpoint, keep_pending); |
bf6313a0 TI |
232 | stopped = true; |
233 | } | |
234 | return stopped; | |
57234bc1 TI |
235 | } |
236 | ||
1d0f9530 | 237 | static int start_endpoints(struct snd_usb_substream *subs) |
edcd3633 DM |
238 | { |
239 | int err; | |
240 | ||
241 | if (!subs->data_endpoint) | |
242 | return -EINVAL; | |
243 | ||
244 | if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { | |
bf6313a0 | 245 | err = snd_usb_endpoint_start(subs->data_endpoint); |
edcd3633 DM |
246 | if (err < 0) { |
247 | clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags); | |
57234bc1 | 248 | goto error; |
edcd3633 DM |
249 | } |
250 | } | |
251 | ||
252 | if (subs->sync_endpoint && | |
253 | !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { | |
bf6313a0 | 254 | err = snd_usb_endpoint_start(subs->sync_endpoint); |
edcd3633 DM |
255 | if (err < 0) { |
256 | clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); | |
57234bc1 | 257 | goto error; |
edcd3633 DM |
258 | } |
259 | } | |
260 | ||
261 | return 0; | |
57234bc1 TI |
262 | |
263 | error: | |
5df4219e | 264 | stop_endpoints(subs, false); |
57234bc1 | 265 | return err; |
edcd3633 DM |
266 | } |
267 | ||
dc5eafe7 TI |
268 | static void sync_pending_stops(struct snd_usb_substream *subs) |
269 | { | |
270 | snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint); | |
271 | snd_usb_endpoint_sync_pending_stop(subs->data_endpoint); | |
272 | } | |
273 | ||
dc5eafe7 TI |
274 | /* PCM sync_stop callback */ |
275 | static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream) | |
276 | { | |
277 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
278 | ||
257d2d7e | 279 | sync_pending_stops(subs); |
dc5eafe7 | 280 | return 0; |
edcd3633 DM |
281 | } |
282 | ||
9fddc15e | 283 | /* Set up sync endpoint */ |
f6581c0e TI |
284 | int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip, |
285 | struct audioformat *fmt) | |
a60945fd | 286 | { |
f6581c0e | 287 | struct usb_device *dev = chip->dev; |
f6581c0e TI |
288 | struct usb_host_interface *alts; |
289 | struct usb_interface_descriptor *altsd; | |
290 | unsigned int ep, attr, sync_attr; | |
291 | bool is_playback; | |
a60945fd EZ |
292 | int err; |
293 | ||
e42a09bc | 294 | alts = snd_usb_get_host_interface(chip, fmt->iface, fmt->altsetting); |
f6581c0e | 295 | if (!alts) |
2bc16b9f | 296 | return 0; |
f6581c0e TI |
297 | altsd = get_iface_desc(alts); |
298 | ||
9fddc15e TI |
299 | err = snd_usb_parse_implicit_fb_quirk(chip, fmt, alts); |
300 | if (err > 0) | |
301 | return 0; /* matched */ | |
302 | ||
303 | /* | |
304 | * Generic sync EP handling | |
305 | */ | |
2bc16b9f | 306 | |
f34d0650 EZ |
307 | if (altsd->bNumEndpoints < 2) |
308 | return 0; | |
c75a8a7a | 309 | |
9fddc15e | 310 | is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN); |
f6581c0e | 311 | attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; |
395ae54b PLB |
312 | if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC || |
313 | attr == USB_ENDPOINT_SYNC_ADAPTIVE)) || | |
f34d0650 EZ |
314 | (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE)) |
315 | return 0; | |
edcd3633 | 316 | |
f6581c0e TI |
317 | sync_attr = get_endpoint(alts, 1)->bmAttributes; |
318 | ||
395ae54b PLB |
319 | /* |
320 | * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see | |
321 | * if we don't find a sync endpoint, as on M-Audio Transit. In case of | |
322 | * error fall back to SYNC mode and don't create sync endpoint | |
323 | */ | |
324 | ||
f34d0650 EZ |
325 | /* check sync-pipe endpoint */ |
326 | /* ... and check descriptor size before accessing bSynchAddress | |
327 | because there is a version of the SB Audigy 2 NX firmware lacking | |
328 | the audio fields in the endpoint descriptors */ | |
f6581c0e | 329 | if ((sync_attr & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC || |
f34d0650 | 330 | (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
95fec883 | 331 | get_endpoint(alts, 1)->bSynchAddress != 0)) { |
0ba41d91 TI |
332 | dev_err(&dev->dev, |
333 | "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n", | |
334 | fmt->iface, fmt->altsetting, | |
f34d0650 EZ |
335 | get_endpoint(alts, 1)->bmAttributes, |
336 | get_endpoint(alts, 1)->bLength, | |
337 | get_endpoint(alts, 1)->bSynchAddress); | |
395ae54b PLB |
338 | if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) |
339 | return 0; | |
f34d0650 EZ |
340 | return -EINVAL; |
341 | } | |
342 | ep = get_endpoint(alts, 1)->bEndpointAddress; | |
95fec883 | 343 | if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
1b34121d | 344 | get_endpoint(alts, 0)->bSynchAddress != 0 && |
f34d0650 EZ |
345 | ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || |
346 | (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { | |
0ba41d91 TI |
347 | dev_err(&dev->dev, |
348 | "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n", | |
349 | fmt->iface, fmt->altsetting, | |
f34d0650 | 350 | is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); |
395ae54b PLB |
351 | if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) |
352 | return 0; | |
f34d0650 | 353 | return -EINVAL; |
edcd3633 | 354 | } |
e5779998 | 355 | |
f6581c0e TI |
356 | fmt->sync_ep = ep; |
357 | fmt->sync_iface = altsd->bInterfaceNumber; | |
358 | fmt->sync_altsetting = altsd->bAlternateSetting; | |
bf6313a0 | 359 | fmt->sync_ep_idx = 1; |
f6581c0e TI |
360 | if ((sync_attr & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB) |
361 | fmt->implicit_fb = 1; | |
362 | ||
363 | dev_dbg(&dev->dev, "%d:%d: found sync_ep=0x%x, iface=%d, alt=%d, implicit_fb=%d\n", | |
364 | fmt->iface, fmt->altsetting, fmt->sync_ep, fmt->sync_iface, | |
365 | fmt->sync_altsetting, fmt->implicit_fb); | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
3f59aa11 JS |
370 | static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state) |
371 | { | |
372 | int ret; | |
373 | ||
374 | if (!subs->str_pd) | |
375 | return 0; | |
376 | ||
377 | ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state); | |
378 | if (ret < 0) { | |
379 | dev_err(&subs->dev->dev, | |
380 | "Cannot change Power Domain ID: %d to state: %d. Err: %d\n", | |
381 | subs->str_pd->pd_id, state, ret); | |
382 | return ret; | |
383 | } | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | int snd_usb_pcm_suspend(struct snd_usb_stream *as) | |
389 | { | |
390 | int ret; | |
391 | ||
392 | ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2); | |
393 | if (ret < 0) | |
394 | return ret; | |
395 | ||
396 | ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2); | |
397 | if (ret < 0) | |
398 | return ret; | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | int snd_usb_pcm_resume(struct snd_usb_stream *as) | |
404 | { | |
405 | int ret; | |
406 | ||
a0a4959e | 407 | ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1); |
3f59aa11 JS |
408 | if (ret < 0) |
409 | return ret; | |
410 | ||
a0a4959e | 411 | ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1); |
3f59aa11 JS |
412 | if (ret < 0) |
413 | return ret; | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
bf6313a0 TI |
418 | static void close_endpoints(struct snd_usb_audio *chip, |
419 | struct snd_usb_substream *subs) | |
420 | { | |
421 | if (subs->data_endpoint) { | |
422 | snd_usb_endpoint_set_sync(chip, subs->data_endpoint, NULL); | |
423 | snd_usb_endpoint_close(chip, subs->data_endpoint); | |
424 | subs->data_endpoint = NULL; | |
425 | } | |
426 | ||
427 | if (subs->sync_endpoint) { | |
428 | snd_usb_endpoint_close(chip, subs->sync_endpoint); | |
429 | subs->sync_endpoint = NULL; | |
430 | } | |
431 | } | |
432 | ||
433 | static int configure_endpoints(struct snd_usb_audio *chip, | |
434 | struct snd_usb_substream *subs) | |
435 | { | |
436 | int err; | |
437 | ||
438 | if (subs->data_endpoint->need_setup) { | |
439 | /* stop any running stream beforehand */ | |
5df4219e | 440 | if (stop_endpoints(subs, false)) |
bf6313a0 TI |
441 | sync_pending_stops(subs); |
442 | err = snd_usb_endpoint_configure(chip, subs->data_endpoint); | |
443 | if (err < 0) | |
444 | return err; | |
445 | snd_usb_set_format_quirk(subs, subs->cur_audiofmt); | |
446 | } | |
447 | ||
448 | if (subs->sync_endpoint) { | |
449 | err = snd_usb_endpoint_configure(chip, subs->sync_endpoint); | |
450 | if (err < 0) | |
451 | return err; | |
452 | } | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
e5779998 DM |
457 | /* |
458 | * hw_params callback | |
459 | * | |
460 | * allocate a buffer and set the given audio format. | |
461 | * | |
462 | * so far we use a physically linear buffer although packetize transfer | |
463 | * doesn't need a continuous area. | |
464 | * if sg buffer is supported on the later version of alsa, we'll follow | |
465 | * that. | |
466 | */ | |
467 | static int snd_usb_hw_params(struct snd_pcm_substream *substream, | |
468 | struct snd_pcm_hw_params *hw_params) | |
469 | { | |
470 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
bf6313a0 | 471 | struct snd_usb_audio *chip = subs->stream->chip; |
cab941b7 TI |
472 | const struct audioformat *fmt; |
473 | const struct audioformat *sync_fmt; | |
61a70950 | 474 | int ret; |
e5779998 | 475 | |
66354f18 SK |
476 | ret = snd_media_start_pipeline(subs); |
477 | if (ret) | |
478 | return ret; | |
479 | ||
bf6313a0 | 480 | fmt = find_substream_format(subs, hw_params); |
e5779998 | 481 | if (!fmt) { |
bf6313a0 TI |
482 | usb_audio_dbg(chip, |
483 | "cannot find format: format=%s, rate=%d, channels=%d\n", | |
484 | snd_pcm_format_name(params_format(hw_params)), | |
485 | params_rate(hw_params), params_channels(hw_params)); | |
66354f18 SK |
486 | ret = -EINVAL; |
487 | goto stop_pipeline; | |
e5779998 DM |
488 | } |
489 | ||
9fddc15e TI |
490 | if (fmt->implicit_fb) { |
491 | sync_fmt = snd_usb_find_implicit_fb_sync_format(chip, fmt, | |
492 | hw_params, | |
493 | !substream->stream); | |
bf6313a0 TI |
494 | if (!sync_fmt) { |
495 | usb_audio_dbg(chip, | |
496 | "cannot find sync format: ep=0x%x, iface=%d:%d, format=%s, rate=%d, channels=%d\n", | |
497 | fmt->sync_ep, fmt->sync_iface, | |
498 | fmt->sync_altsetting, | |
499 | snd_pcm_format_name(params_format(hw_params)), | |
500 | params_rate(hw_params), params_channels(hw_params)); | |
501 | ret = -EINVAL; | |
502 | goto stop_pipeline; | |
503 | } | |
504 | } else { | |
505 | sync_fmt = fmt; | |
506 | } | |
507 | ||
508 | ret = snd_usb_lock_shutdown(chip); | |
47ab1545 | 509 | if (ret < 0) |
66354f18 | 510 | goto stop_pipeline; |
a0a4959e JS |
511 | |
512 | ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); | |
513 | if (ret < 0) | |
514 | goto unlock; | |
515 | ||
bf6313a0 TI |
516 | if (subs->data_endpoint) { |
517 | if (snd_usb_endpoint_compatible(chip, subs->data_endpoint, | |
518 | fmt, hw_params)) | |
519 | goto unlock; | |
520 | close_endpoints(chip, subs); | |
521 | } | |
522 | ||
523 | subs->data_endpoint = snd_usb_endpoint_open(chip, fmt, hw_params, false); | |
524 | if (!subs->data_endpoint) { | |
525 | ret = -EINVAL; | |
526 | goto unlock; | |
527 | } | |
528 | ||
529 | if (fmt->sync_ep) { | |
530 | subs->sync_endpoint = snd_usb_endpoint_open(chip, sync_fmt, | |
531 | hw_params, | |
532 | fmt == sync_fmt); | |
533 | if (!subs->sync_endpoint) { | |
534 | ret = -EINVAL; | |
535 | goto unlock; | |
536 | } | |
537 | ||
538 | snd_usb_endpoint_set_sync(chip, subs->data_endpoint, | |
539 | subs->sync_endpoint); | |
540 | } | |
541 | ||
6aa719d1 | 542 | mutex_lock(&chip->mutex); |
bf6313a0 | 543 | subs->cur_audiofmt = fmt; |
6aa719d1 | 544 | mutex_unlock(&chip->mutex); |
bf6313a0 TI |
545 | |
546 | ret = configure_endpoints(chip, subs); | |
bf6313a0 | 547 | |
a0a4959e | 548 | unlock: |
66354f18 | 549 | if (ret < 0) |
bf6313a0 | 550 | close_endpoints(chip, subs); |
66354f18 | 551 | |
bf6313a0 | 552 | snd_usb_unlock_shutdown(chip); |
66354f18 | 553 | stop_pipeline: |
bf6313a0 TI |
554 | if (ret < 0) |
555 | snd_media_stop_pipeline(subs); | |
556 | ||
a0a4959e | 557 | return ret; |
e5779998 DM |
558 | } |
559 | ||
560 | /* | |
561 | * hw_free callback | |
562 | * | |
563 | * reset the audio format and release the buffer | |
564 | */ | |
565 | static int snd_usb_hw_free(struct snd_pcm_substream *substream) | |
566 | { | |
567 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
5a6c3e11 | 568 | struct snd_usb_audio *chip = subs->stream->chip; |
e5779998 | 569 | |
66354f18 | 570 | snd_media_stop_pipeline(subs); |
6aa719d1 | 571 | mutex_lock(&chip->mutex); |
e5779998 | 572 | subs->cur_audiofmt = NULL; |
6aa719d1 | 573 | mutex_unlock(&chip->mutex); |
5a6c3e11 | 574 | if (!snd_usb_lock_shutdown(chip)) { |
5df4219e | 575 | if (stop_endpoints(subs, false)) |
bf6313a0 TI |
576 | sync_pending_stops(subs); |
577 | close_endpoints(chip, subs); | |
5a6c3e11 | 578 | snd_usb_unlock_shutdown(chip); |
978520b7 | 579 | } |
f274baa4 | 580 | |
6dd9486c | 581 | return 0; |
e5779998 DM |
582 | } |
583 | ||
43e6929d TI |
584 | /* free-wheeling mode? (e.g. dmix) */ |
585 | static int in_free_wheeling_mode(struct snd_pcm_runtime *runtime) | |
586 | { | |
587 | return runtime->stop_threshold > runtime->buffer_size; | |
588 | } | |
589 | ||
d2a34b93 | 590 | /* check whether early start is needed for playback stream */ |
3565a075 TI |
591 | static int lowlatency_playback_available(struct snd_pcm_runtime *runtime, |
592 | struct snd_usb_substream *subs) | |
d2a34b93 TI |
593 | { |
594 | struct snd_usb_audio *chip = subs->stream->chip; | |
595 | ||
596 | if (subs->direction == SNDRV_PCM_STREAM_CAPTURE) | |
597 | return false; | |
598 | /* disabled via module option? */ | |
599 | if (!chip->lowlatency) | |
600 | return false; | |
43e6929d | 601 | if (in_free_wheeling_mode(runtime)) |
3565a075 | 602 | return false; |
44137d6f TI |
603 | /* implicit feedback mode has own operation mode */ |
604 | if (snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint)) | |
605 | return false; | |
d2a34b93 TI |
606 | return true; |
607 | } | |
608 | ||
e5779998 DM |
609 | /* |
610 | * prepare callback | |
611 | * | |
612 | * only a few subtle things... | |
613 | */ | |
614 | static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) | |
615 | { | |
616 | struct snd_pcm_runtime *runtime = substream->runtime; | |
617 | struct snd_usb_substream *subs = runtime->private_data; | |
bf6313a0 | 618 | struct snd_usb_audio *chip = subs->stream->chip; |
61a70950 | 619 | int ret; |
e5779998 | 620 | |
bf6313a0 | 621 | ret = snd_usb_lock_shutdown(chip); |
47ab1545 TI |
622 | if (ret < 0) |
623 | return ret; | |
978520b7 TI |
624 | if (snd_BUG_ON(!subs->data_endpoint)) { |
625 | ret = -EIO; | |
626 | goto unlock; | |
627 | } | |
edcd3633 | 628 | |
bf6313a0 | 629 | ret = configure_endpoints(chip, subs); |
61a70950 | 630 | if (ret < 0) |
978520b7 | 631 | goto unlock; |
61a70950 | 632 | |
e5779998 | 633 | /* reset the pointer */ |
d303c5d3 | 634 | subs->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size); |
e8a8f09c | 635 | subs->inflight_bytes = 0; |
e5779998 DM |
636 | subs->hwptr_done = 0; |
637 | subs->transfer_done = 0; | |
294c4fb8 | 638 | subs->last_frame_number = 0; |
307cc9ba | 639 | subs->period_elapsed_pending = 0; |
e5779998 DM |
640 | runtime->delay = 0; |
641 | ||
3565a075 | 642 | subs->lowlatency_playback = lowlatency_playback_available(runtime, subs); |
f8624987 TI |
643 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
644 | !subs->lowlatency_playback) | |
4267c5a8 TI |
645 | ret = start_endpoints(subs); |
646 | ||
978520b7 | 647 | unlock: |
bf6313a0 | 648 | snd_usb_unlock_shutdown(chip); |
978520b7 | 649 | return ret; |
e5779998 DM |
650 | } |
651 | ||
7ec827b9 TI |
652 | /* |
653 | * h/w constraints | |
654 | */ | |
655 | ||
656 | #ifdef HW_CONST_DEBUG | |
657 | #define hwc_debug(fmt, args...) pr_debug(fmt, ##args) | |
658 | #else | |
659 | #define hwc_debug(fmt, args...) do { } while(0) | |
660 | #endif | |
661 | ||
aaffbf78 | 662 | static const struct snd_pcm_hardware snd_usb_hardware = |
e5779998 DM |
663 | { |
664 | .info = SNDRV_PCM_INFO_MMAP | | |
665 | SNDRV_PCM_INFO_MMAP_VALID | | |
666 | SNDRV_PCM_INFO_BATCH | | |
667 | SNDRV_PCM_INFO_INTERLEAVED | | |
668 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
669 | SNDRV_PCM_INFO_PAUSE, | |
bf6313a0 TI |
670 | .channels_min = 1, |
671 | .channels_max = 256, | |
ecb01ff3 | 672 | .buffer_bytes_max = INT_MAX, /* limited by BUFFER_TIME later */ |
e5779998 | 673 | .period_bytes_min = 64, |
ecb01ff3 | 674 | .period_bytes_max = INT_MAX, /* limited by PERIOD_TIME later */ |
e5779998 DM |
675 | .periods_min = 2, |
676 | .periods_max = 1024, | |
677 | }; | |
678 | ||
679 | static int hw_check_valid_format(struct snd_usb_substream *subs, | |
680 | struct snd_pcm_hw_params *params, | |
cab941b7 | 681 | const struct audioformat *fp) |
e5779998 DM |
682 | { |
683 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
684 | struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
685 | struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
686 | struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); | |
015eb0b0 | 687 | struct snd_mask check_fmts; |
e5779998 DM |
688 | unsigned int ptime; |
689 | ||
690 | /* check the format */ | |
015eb0b0 CL |
691 | snd_mask_none(&check_fmts); |
692 | check_fmts.bits[0] = (u32)fp->formats; | |
693 | check_fmts.bits[1] = (u32)(fp->formats >> 32); | |
694 | snd_mask_intersect(&check_fmts, fmts); | |
695 | if (snd_mask_empty(&check_fmts)) { | |
e4ea77f8 | 696 | hwc_debug(" > check: no supported format 0x%llx\n", fp->formats); |
e5779998 DM |
697 | return 0; |
698 | } | |
699 | /* check the channels */ | |
700 | if (fp->channels < ct->min || fp->channels > ct->max) { | |
701 | hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); | |
702 | return 0; | |
703 | } | |
704 | /* check the rate is within the range */ | |
705 | if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { | |
706 | hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); | |
707 | return 0; | |
708 | } | |
709 | if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { | |
710 | hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); | |
711 | return 0; | |
712 | } | |
713 | /* check whether the period time is >= the data packet interval */ | |
978520b7 | 714 | if (subs->speed != USB_SPEED_FULL) { |
e5779998 DM |
715 | ptime = 125 * (1 << fp->datainterval); |
716 | if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { | |
717 | hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); | |
718 | return 0; | |
719 | } | |
720 | } | |
721 | return 1; | |
722 | } | |
723 | ||
7726dce1 TI |
724 | static int apply_hw_params_minmax(struct snd_interval *it, unsigned int rmin, |
725 | unsigned int rmax) | |
726 | { | |
727 | int changed; | |
728 | ||
729 | if (rmin > rmax) { | |
730 | hwc_debug(" --> get empty\n"); | |
731 | it->empty = 1; | |
732 | return -EINVAL; | |
733 | } | |
734 | ||
735 | changed = 0; | |
736 | if (it->min < rmin) { | |
737 | it->min = rmin; | |
738 | it->openmin = 0; | |
739 | changed = 1; | |
740 | } | |
741 | if (it->max > rmax) { | |
742 | it->max = rmax; | |
743 | it->openmax = 0; | |
744 | changed = 1; | |
745 | } | |
746 | if (snd_interval_checkempty(it)) { | |
747 | it->empty = 1; | |
748 | return -EINVAL; | |
749 | } | |
750 | hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); | |
751 | return changed; | |
752 | } | |
753 | ||
e5779998 DM |
754 | static int hw_rule_rate(struct snd_pcm_hw_params *params, |
755 | struct snd_pcm_hw_rule *rule) | |
756 | { | |
757 | struct snd_usb_substream *subs = rule->private; | |
d57f95c9 | 758 | struct snd_usb_audio *chip = subs->stream->chip; |
cab941b7 | 759 | const struct audioformat *fp; |
e5779998 | 760 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
bc4e94aa | 761 | unsigned int rmin, rmax, r; |
bc4e94aa | 762 | int i; |
e5779998 DM |
763 | |
764 | hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); | |
bc4e94aa TI |
765 | rmin = UINT_MAX; |
766 | rmax = 0; | |
88766f04 | 767 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
768 | if (!hw_check_valid_format(subs, params, fp)) |
769 | continue; | |
d57f95c9 TI |
770 | r = snd_usb_endpoint_get_clock_rate(chip, fp->clock); |
771 | if (r > 0) { | |
772 | if (!snd_interval_test(it, r)) | |
773 | continue; | |
774 | rmin = min(rmin, r); | |
775 | rmax = max(rmax, r); | |
776 | continue; | |
777 | } | |
bc4e94aa TI |
778 | if (fp->rate_table && fp->nr_rates) { |
779 | for (i = 0; i < fp->nr_rates; i++) { | |
780 | r = fp->rate_table[i]; | |
781 | if (!snd_interval_test(it, r)) | |
782 | continue; | |
783 | rmin = min(rmin, r); | |
784 | rmax = max(rmax, r); | |
785 | } | |
e5779998 | 786 | } else { |
bc4e94aa TI |
787 | rmin = min(rmin, fp->rate_min); |
788 | rmax = max(rmax, fp->rate_max); | |
e5779998 DM |
789 | } |
790 | } | |
791 | ||
7726dce1 | 792 | return apply_hw_params_minmax(it, rmin, rmax); |
e5779998 DM |
793 | } |
794 | ||
795 | ||
796 | static int hw_rule_channels(struct snd_pcm_hw_params *params, | |
797 | struct snd_pcm_hw_rule *rule) | |
798 | { | |
799 | struct snd_usb_substream *subs = rule->private; | |
cab941b7 | 800 | const struct audioformat *fp; |
e5779998 DM |
801 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
802 | unsigned int rmin, rmax; | |
e5779998 DM |
803 | |
804 | hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); | |
7726dce1 TI |
805 | rmin = UINT_MAX; |
806 | rmax = 0; | |
88766f04 | 807 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
808 | if (!hw_check_valid_format(subs, params, fp)) |
809 | continue; | |
7726dce1 TI |
810 | rmin = min(rmin, fp->channels); |
811 | rmax = max(rmax, fp->channels); | |
e5779998 DM |
812 | } |
813 | ||
7726dce1 | 814 | return apply_hw_params_minmax(it, rmin, rmax); |
e5779998 DM |
815 | } |
816 | ||
e4ea77f8 | 817 | static int apply_hw_params_format_bits(struct snd_mask *fmt, u64 fbits) |
e5779998 | 818 | { |
e5779998 DM |
819 | u32 oldbits[2]; |
820 | int changed; | |
821 | ||
e5779998 DM |
822 | oldbits[0] = fmt->bits[0]; |
823 | oldbits[1] = fmt->bits[1]; | |
824 | fmt->bits[0] &= (u32)fbits; | |
825 | fmt->bits[1] &= (u32)(fbits >> 32); | |
826 | if (!fmt->bits[0] && !fmt->bits[1]) { | |
827 | hwc_debug(" --> get empty\n"); | |
828 | return -EINVAL; | |
829 | } | |
830 | changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); | |
831 | hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); | |
832 | return changed; | |
833 | } | |
834 | ||
e4ea77f8 TI |
835 | static int hw_rule_format(struct snd_pcm_hw_params *params, |
836 | struct snd_pcm_hw_rule *rule) | |
837 | { | |
838 | struct snd_usb_substream *subs = rule->private; | |
839 | const struct audioformat *fp; | |
840 | struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
841 | u64 fbits; | |
842 | ||
843 | hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); | |
844 | fbits = 0; | |
845 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
846 | if (!hw_check_valid_format(subs, params, fp)) | |
847 | continue; | |
848 | fbits |= fp->formats; | |
849 | } | |
850 | return apply_hw_params_format_bits(fmt, fbits); | |
851 | } | |
852 | ||
e5779998 DM |
853 | static int hw_rule_period_time(struct snd_pcm_hw_params *params, |
854 | struct snd_pcm_hw_rule *rule) | |
855 | { | |
856 | struct snd_usb_substream *subs = rule->private; | |
cab941b7 | 857 | const struct audioformat *fp; |
e5779998 DM |
858 | struct snd_interval *it; |
859 | unsigned char min_datainterval; | |
860 | unsigned int pmin; | |
e5779998 DM |
861 | |
862 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); | |
863 | hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); | |
864 | min_datainterval = 0xff; | |
865 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
866 | if (!hw_check_valid_format(subs, params, fp)) | |
867 | continue; | |
868 | min_datainterval = min(min_datainterval, fp->datainterval); | |
869 | } | |
870 | if (min_datainterval == 0xff) { | |
a7ce2e0d | 871 | hwc_debug(" --> get empty\n"); |
e5779998 DM |
872 | it->empty = 1; |
873 | return -EINVAL; | |
874 | } | |
875 | pmin = 125 * (1 << min_datainterval); | |
7726dce1 TI |
876 | |
877 | return apply_hw_params_minmax(it, pmin, UINT_MAX); | |
e5779998 DM |
878 | } |
879 | ||
e4ea77f8 TI |
880 | /* get the EP or the sync EP for implicit fb when it's already set up */ |
881 | static const struct snd_usb_endpoint * | |
882 | get_sync_ep_from_substream(struct snd_usb_substream *subs) | |
5a6c3e11 TI |
883 | { |
884 | struct snd_usb_audio *chip = subs->stream->chip; | |
cab941b7 | 885 | const struct audioformat *fp; |
e4ea77f8 | 886 | const struct snd_usb_endpoint *ep; |
5a6c3e11 | 887 | |
5a6c3e11 | 888 | list_for_each_entry(fp, &subs->fmt_list, list) { |
54cb3190 | 889 | ep = snd_usb_get_endpoint(chip, fp->endpoint); |
5f5e6a3e TI |
890 | if (ep && ep->cur_audiofmt) { |
891 | /* if EP is already opened solely for this substream, | |
892 | * we still allow us to change the parameter; otherwise | |
893 | * this substream has to follow the existing parameter | |
894 | */ | |
895 | if (ep->cur_audiofmt != subs->cur_audiofmt || ep->opened > 1) | |
896 | return ep; | |
897 | } | |
5a6c3e11 TI |
898 | if (!fp->implicit_fb) |
899 | continue; | |
900 | /* for the implicit fb, check the sync ep as well */ | |
54cb3190 | 901 | ep = snd_usb_get_endpoint(chip, fp->sync_ep); |
5f5e6a3e | 902 | if (ep && ep->cur_audiofmt) |
e4ea77f8 | 903 | return ep; |
5a6c3e11 | 904 | } |
e4ea77f8 TI |
905 | return NULL; |
906 | } | |
907 | ||
908 | /* additional hw constraints for implicit feedback mode */ | |
909 | static int hw_rule_format_implicit_fb(struct snd_pcm_hw_params *params, | |
910 | struct snd_pcm_hw_rule *rule) | |
911 | { | |
912 | struct snd_usb_substream *subs = rule->private; | |
913 | const struct snd_usb_endpoint *ep; | |
914 | struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
5a6c3e11 | 915 | |
e4ea77f8 TI |
916 | ep = get_sync_ep_from_substream(subs); |
917 | if (!ep) | |
5a6c3e11 | 918 | return 0; |
5a6c3e11 | 919 | |
e4ea77f8 TI |
920 | hwc_debug("applying %s\n", __func__); |
921 | return apply_hw_params_format_bits(fmt, pcm_format_to_bits(ep->cur_format)); | |
922 | } | |
5a6c3e11 | 923 | |
e4ea77f8 TI |
924 | static int hw_rule_rate_implicit_fb(struct snd_pcm_hw_params *params, |
925 | struct snd_pcm_hw_rule *rule) | |
926 | { | |
927 | struct snd_usb_substream *subs = rule->private; | |
928 | const struct snd_usb_endpoint *ep; | |
929 | struct snd_interval *it; | |
bf6313a0 | 930 | |
e4ea77f8 TI |
931 | ep = get_sync_ep_from_substream(subs); |
932 | if (!ep) | |
933 | return 0; | |
5a6c3e11 | 934 | |
e4ea77f8 TI |
935 | hwc_debug("applying %s\n", __func__); |
936 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
937 | return apply_hw_params_minmax(it, ep->cur_rate, ep->cur_rate); | |
938 | } | |
939 | ||
940 | static int hw_rule_period_size_implicit_fb(struct snd_pcm_hw_params *params, | |
941 | struct snd_pcm_hw_rule *rule) | |
942 | { | |
943 | struct snd_usb_substream *subs = rule->private; | |
944 | const struct snd_usb_endpoint *ep; | |
945 | struct snd_interval *it; | |
5a6c3e11 | 946 | |
e4ea77f8 TI |
947 | ep = get_sync_ep_from_substream(subs); |
948 | if (!ep) | |
949 | return 0; | |
950 | ||
951 | hwc_debug("applying %s\n", __func__); | |
952 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); | |
953 | return apply_hw_params_minmax(it, ep->cur_period_frames, | |
954 | ep->cur_period_frames); | |
955 | } | |
956 | ||
957 | static int hw_rule_periods_implicit_fb(struct snd_pcm_hw_params *params, | |
958 | struct snd_pcm_hw_rule *rule) | |
959 | { | |
960 | struct snd_usb_substream *subs = rule->private; | |
961 | const struct snd_usb_endpoint *ep; | |
962 | struct snd_interval *it; | |
963 | ||
964 | ep = get_sync_ep_from_substream(subs); | |
965 | if (!ep) | |
966 | return 0; | |
967 | ||
968 | hwc_debug("applying %s\n", __func__); | |
969 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIODS); | |
970 | return apply_hw_params_minmax(it, ep->cur_buffer_periods, | |
971 | ep->cur_buffer_periods); | |
5a6c3e11 | 972 | } |
e5779998 DM |
973 | |
974 | /* | |
975 | * set up the runtime hardware information. | |
976 | */ | |
977 | ||
978 | static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) | |
979 | { | |
cab941b7 | 980 | const struct audioformat *fp; |
e5779998 | 981 | unsigned int pt, ptmin; |
5a6c3e11 | 982 | int param_period_time_if_needed = -1; |
e5779998 DM |
983 | int err; |
984 | ||
985 | runtime->hw.formats = subs->formats; | |
986 | ||
987 | runtime->hw.rate_min = 0x7fffffff; | |
988 | runtime->hw.rate_max = 0; | |
989 | runtime->hw.channels_min = 256; | |
990 | runtime->hw.channels_max = 0; | |
991 | runtime->hw.rates = 0; | |
992 | ptmin = UINT_MAX; | |
993 | /* check min/max rates and channels */ | |
88766f04 | 994 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
995 | runtime->hw.rates |= fp->rates; |
996 | if (runtime->hw.rate_min > fp->rate_min) | |
997 | runtime->hw.rate_min = fp->rate_min; | |
998 | if (runtime->hw.rate_max < fp->rate_max) | |
999 | runtime->hw.rate_max = fp->rate_max; | |
1000 | if (runtime->hw.channels_min > fp->channels) | |
1001 | runtime->hw.channels_min = fp->channels; | |
1002 | if (runtime->hw.channels_max < fp->channels) | |
1003 | runtime->hw.channels_max = fp->channels; | |
1004 | if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { | |
1005 | /* FIXME: there might be more than one audio formats... */ | |
1006 | runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = | |
1007 | fp->frame_size; | |
1008 | } | |
1009 | pt = 125 * (1 << fp->datainterval); | |
1010 | ptmin = min(ptmin, pt); | |
1011 | } | |
1012 | ||
1013 | param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; | |
978520b7 | 1014 | if (subs->speed == USB_SPEED_FULL) |
e5779998 DM |
1015 | /* full speed devices have fixed data packet interval */ |
1016 | ptmin = 1000; | |
1017 | if (ptmin == 1000) | |
1018 | /* if period time doesn't go below 1 ms, no rules needed */ | |
1019 | param_period_time_if_needed = -1; | |
e92be814 TI |
1020 | |
1021 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1022 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1023 | ptmin, UINT_MAX); | |
1024 | if (err < 0) | |
1025 | return err; | |
1026 | ||
1027 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1028 | hw_rule_rate, subs, | |
506c203c | 1029 | SNDRV_PCM_HW_PARAM_RATE, |
e92be814 TI |
1030 | SNDRV_PCM_HW_PARAM_FORMAT, |
1031 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1032 | param_period_time_if_needed, | |
1033 | -1); | |
1034 | if (err < 0) | |
1035 | return err; | |
5a6c3e11 | 1036 | |
e92be814 TI |
1037 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
1038 | hw_rule_channels, subs, | |
506c203c | 1039 | SNDRV_PCM_HW_PARAM_CHANNELS, |
e92be814 TI |
1040 | SNDRV_PCM_HW_PARAM_FORMAT, |
1041 | SNDRV_PCM_HW_PARAM_RATE, | |
1042 | param_period_time_if_needed, | |
1043 | -1); | |
1044 | if (err < 0) | |
1045 | return err; | |
1046 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1047 | hw_rule_format, subs, | |
506c203c | 1048 | SNDRV_PCM_HW_PARAM_FORMAT, |
e92be814 TI |
1049 | SNDRV_PCM_HW_PARAM_RATE, |
1050 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1051 | param_period_time_if_needed, | |
1052 | -1); | |
1053 | if (err < 0) | |
1054 | return err; | |
e5779998 DM |
1055 | if (param_period_time_if_needed >= 0) { |
1056 | err = snd_pcm_hw_rule_add(runtime, 0, | |
1057 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1058 | hw_rule_period_time, subs, | |
1059 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1060 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1061 | SNDRV_PCM_HW_PARAM_RATE, | |
1062 | -1); | |
1063 | if (err < 0) | |
e92be814 | 1064 | return err; |
e5779998 | 1065 | } |
88a8516a | 1066 | |
ecb01ff3 TI |
1067 | /* set max period and buffer sizes for 1 and 2 seconds, respectively */ |
1068 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1069 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1070 | 0, 1000000); | |
1071 | if (err < 0) | |
1072 | return err; | |
1073 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1074 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
1075 | 0, 2000000); | |
1076 | if (err < 0) | |
1077 | return err; | |
1078 | ||
e4ea77f8 TI |
1079 | /* additional hw constraints for implicit fb */ |
1080 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1081 | hw_rule_format_implicit_fb, subs, | |
1082 | SNDRV_PCM_HW_PARAM_FORMAT, -1); | |
1083 | if (err < 0) | |
1084 | return err; | |
1085 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1086 | hw_rule_rate_implicit_fb, subs, | |
1087 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1088 | if (err < 0) | |
1089 | return err; | |
1090 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1091 | hw_rule_period_size_implicit_fb, subs, | |
1092 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1093 | if (err < 0) | |
1094 | return err; | |
1095 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
1096 | hw_rule_periods_implicit_fb, subs, | |
1097 | SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1098 | if (err < 0) | |
1099 | return err; | |
1100 | ||
1865211d | 1101 | return 0; |
e5779998 DM |
1102 | } |
1103 | ||
6fddc797 | 1104 | static int snd_usb_pcm_open(struct snd_pcm_substream *substream) |
e5779998 | 1105 | { |
6fddc797 | 1106 | int direction = substream->stream; |
e5779998 DM |
1107 | struct snd_usb_stream *as = snd_pcm_substream_chip(substream); |
1108 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1109 | struct snd_usb_substream *subs = &as->substream[direction]; | |
66354f18 | 1110 | int ret; |
e5779998 | 1111 | |
e5779998 | 1112 | runtime->hw = snd_usb_hardware; |
fe1cc9df TI |
1113 | /* need an explicit sync to catch applptr update in low-latency mode */ |
1114 | if (direction == SNDRV_PCM_STREAM_PLAYBACK && | |
1115 | as->chip->lowlatency) | |
96acb953 | 1116 | runtime->hw.info |= SNDRV_PCM_INFO_SYNC_APPLPTR; |
e5779998 DM |
1117 | runtime->private_data = subs; |
1118 | subs->pcm_substream = substream; | |
88a8516a | 1119 | /* runtime PM is also done there */ |
d24f5061 DM |
1120 | |
1121 | /* initialize DSD/DOP context */ | |
1122 | subs->dsd_dop.byte_idx = 0; | |
1123 | subs->dsd_dop.channel = 0; | |
1124 | subs->dsd_dop.marker = 1; | |
1125 | ||
66354f18 | 1126 | ret = setup_hw_info(runtime, subs); |
1865211d TI |
1127 | if (ret < 0) |
1128 | return ret; | |
1129 | ret = snd_usb_autoresume(subs->stream->chip); | |
1130 | if (ret < 0) | |
1131 | return ret; | |
1132 | ret = snd_media_stream_init(subs, as->pcm, direction); | |
1133 | if (ret < 0) | |
1134 | snd_usb_autosuspend(subs->stream->chip); | |
66354f18 | 1135 | return ret; |
e5779998 DM |
1136 | } |
1137 | ||
6fddc797 | 1138 | static int snd_usb_pcm_close(struct snd_pcm_substream *substream) |
e5779998 | 1139 | { |
6fddc797 | 1140 | int direction = substream->stream; |
e5779998 DM |
1141 | struct snd_usb_stream *as = snd_pcm_substream_chip(substream); |
1142 | struct snd_usb_substream *subs = &as->substream[direction]; | |
a0a4959e | 1143 | int ret; |
e5779998 | 1144 | |
66354f18 | 1145 | snd_media_stop_pipeline(subs); |
68e67f40 | 1146 | |
bf6313a0 | 1147 | if (!snd_usb_lock_shutdown(subs->stream->chip)) { |
a0a4959e | 1148 | ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1); |
47ab1545 | 1149 | snd_usb_unlock_shutdown(subs->stream->chip); |
a0a4959e JS |
1150 | if (ret < 0) |
1151 | return ret; | |
68e67f40 DM |
1152 | } |
1153 | ||
e5779998 | 1154 | subs->pcm_substream = NULL; |
88a8516a | 1155 | snd_usb_autosuspend(subs->stream->chip); |
edcd3633 | 1156 | |
68e67f40 | 1157 | return 0; |
edcd3633 DM |
1158 | } |
1159 | ||
1160 | /* Since a URB can handle only a single linear buffer, we must use double | |
1161 | * buffering when the data to be transferred overflows the buffer boundary. | |
1162 | * To avoid inconsistencies when updating hwptr_done, we use double buffering | |
1163 | * for all URBs. | |
1164 | */ | |
1165 | static void retire_capture_urb(struct snd_usb_substream *subs, | |
1166 | struct urb *urb) | |
1167 | { | |
1168 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1169 | unsigned int stride, frames, bytes, oldptr; | |
1170 | int i, period_elapsed = 0; | |
1171 | unsigned long flags; | |
1172 | unsigned char *cp; | |
e4cc6153 PLB |
1173 | int current_frame_number; |
1174 | ||
1175 | /* read frame number here, update pointer in critical section */ | |
1176 | current_frame_number = usb_get_current_frame_number(subs->dev); | |
edcd3633 DM |
1177 | |
1178 | stride = runtime->frame_bits >> 3; | |
1179 | ||
1180 | for (i = 0; i < urb->number_of_packets; i++) { | |
1539d4f8 | 1181 | cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj; |
edcd3633 | 1182 | if (urb->iso_frame_desc[i].status && printk_ratelimit()) { |
0ba41d91 TI |
1183 | dev_dbg(&subs->dev->dev, "frame %d active: %d\n", |
1184 | i, urb->iso_frame_desc[i].status); | |
edcd3633 DM |
1185 | // continue; |
1186 | } | |
1187 | bytes = urb->iso_frame_desc[i].actual_length; | |
1b7ecc24 HM |
1188 | if (subs->stream_offset_adj > 0) { |
1189 | unsigned int adj = min(subs->stream_offset_adj, bytes); | |
1190 | cp += adj; | |
1191 | bytes -= adj; | |
1192 | subs->stream_offset_adj -= adj; | |
1193 | } | |
edcd3633 DM |
1194 | frames = bytes / stride; |
1195 | if (!subs->txfr_quirk) | |
1196 | bytes = frames * stride; | |
1197 | if (bytes % (runtime->sample_bits >> 3) != 0) { | |
edcd3633 | 1198 | int oldbytes = bytes; |
edcd3633 | 1199 | bytes = frames * stride; |
377a879d | 1200 | dev_warn_ratelimited(&subs->dev->dev, |
0ba41d91 | 1201 | "Corrected urb data len. %d->%d\n", |
edcd3633 DM |
1202 | oldbytes, bytes); |
1203 | } | |
1204 | /* update the current pointer */ | |
1205 | spin_lock_irqsave(&subs->lock, flags); | |
1206 | oldptr = subs->hwptr_done; | |
1207 | subs->hwptr_done += bytes; | |
d303c5d3 TI |
1208 | if (subs->hwptr_done >= subs->buffer_bytes) |
1209 | subs->hwptr_done -= subs->buffer_bytes; | |
edcd3633 DM |
1210 | frames = (bytes + (oldptr % stride)) / stride; |
1211 | subs->transfer_done += frames; | |
1212 | if (subs->transfer_done >= runtime->period_size) { | |
1213 | subs->transfer_done -= runtime->period_size; | |
1214 | period_elapsed = 1; | |
1215 | } | |
e4cc6153 PLB |
1216 | |
1217 | /* realign last_frame_number */ | |
1218 | subs->last_frame_number = current_frame_number; | |
e4cc6153 | 1219 | |
edcd3633 DM |
1220 | spin_unlock_irqrestore(&subs->lock, flags); |
1221 | /* copy a data chunk */ | |
d303c5d3 TI |
1222 | if (oldptr + bytes > subs->buffer_bytes) { |
1223 | unsigned int bytes1 = subs->buffer_bytes - oldptr; | |
1224 | ||
edcd3633 DM |
1225 | memcpy(runtime->dma_area + oldptr, cp, bytes1); |
1226 | memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); | |
1227 | } else { | |
1228 | memcpy(runtime->dma_area + oldptr, cp, bytes); | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | if (period_elapsed) | |
1233 | snd_pcm_period_elapsed(subs->pcm_substream); | |
1234 | } | |
1235 | ||
e8a8f09c TI |
1236 | static void urb_ctx_queue_advance(struct snd_usb_substream *subs, |
1237 | struct urb *urb, unsigned int bytes) | |
1238 | { | |
1239 | struct snd_urb_ctx *ctx = urb->context; | |
1240 | ||
1241 | ctx->queued += bytes; | |
1242 | subs->inflight_bytes += bytes; | |
1243 | subs->hwptr_done += bytes; | |
1244 | if (subs->hwptr_done >= subs->buffer_bytes) | |
1245 | subs->hwptr_done -= subs->buffer_bytes; | |
1246 | } | |
1247 | ||
d24f5061 DM |
1248 | static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs, |
1249 | struct urb *urb, unsigned int bytes) | |
1250 | { | |
1251 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
d24f5061 DM |
1252 | unsigned int dst_idx = 0; |
1253 | unsigned int src_idx = subs->hwptr_done; | |
d303c5d3 | 1254 | unsigned int wrap = subs->buffer_bytes; |
d24f5061 DM |
1255 | u8 *dst = urb->transfer_buffer; |
1256 | u8 *src = runtime->dma_area; | |
1257 | u8 marker[] = { 0x05, 0xfa }; | |
e8a8f09c | 1258 | unsigned int queued = 0; |
d24f5061 DM |
1259 | |
1260 | /* | |
1261 | * The DSP DOP format defines a way to transport DSD samples over | |
1262 | * normal PCM data endpoints. It requires stuffing of marker bytes | |
1263 | * (0x05 and 0xfa, alternating per sample frame), and then expects | |
1264 | * 2 additional bytes of actual payload. The whole frame is stored | |
1265 | * LSB. | |
1266 | * | |
1267 | * Hence, for a stereo transport, the buffer layout looks like this, | |
1268 | * where L refers to left channel samples and R to right. | |
1269 | * | |
1270 | * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa | |
1271 | * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa | |
1272 | * ..... | |
1273 | * | |
1274 | */ | |
1275 | ||
1276 | while (bytes--) { | |
1277 | if (++subs->dsd_dop.byte_idx == 3) { | |
1278 | /* frame boundary? */ | |
1279 | dst[dst_idx++] = marker[subs->dsd_dop.marker]; | |
1280 | src_idx += 2; | |
1281 | subs->dsd_dop.byte_idx = 0; | |
1282 | ||
1283 | if (++subs->dsd_dop.channel % runtime->channels == 0) { | |
1284 | /* alternate the marker */ | |
1285 | subs->dsd_dop.marker++; | |
1286 | subs->dsd_dop.marker %= ARRAY_SIZE(marker); | |
1287 | subs->dsd_dop.channel = 0; | |
1288 | } | |
1289 | } else { | |
1290 | /* stuff the DSD payload */ | |
1291 | int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap; | |
44dcbbb1 DM |
1292 | |
1293 | if (subs->cur_audiofmt->dsd_bitrev) | |
1294 | dst[dst_idx++] = bitrev8(src[idx]); | |
1295 | else | |
1296 | dst[dst_idx++] = src[idx]; | |
e8a8f09c | 1297 | queued++; |
d24f5061 DM |
1298 | } |
1299 | } | |
e8a8f09c TI |
1300 | |
1301 | urb_ctx_queue_advance(subs, urb, queued); | |
d24f5061 DM |
1302 | } |
1303 | ||
4f083917 TI |
1304 | /* copy bit-reversed bytes onto transfer buffer */ |
1305 | static void fill_playback_urb_dsd_bitrev(struct snd_usb_substream *subs, | |
1306 | struct urb *urb, unsigned int bytes) | |
1307 | { | |
1308 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1309 | const u8 *src = runtime->dma_area; | |
1310 | u8 *buf = urb->transfer_buffer; | |
1311 | int i, ofs = subs->hwptr_done; | |
1312 | ||
1313 | for (i = 0; i < bytes; i++) { | |
1314 | *buf++ = bitrev8(src[ofs]); | |
1315 | if (++ofs >= subs->buffer_bytes) | |
1316 | ofs = 0; | |
1317 | } | |
1318 | ||
1319 | urb_ctx_queue_advance(subs, urb, bytes); | |
1320 | } | |
1321 | ||
b97a9369 RW |
1322 | static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb, |
1323 | int offset, int stride, unsigned int bytes) | |
07a40c2f RW |
1324 | { |
1325 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1326 | ||
d303c5d3 | 1327 | if (subs->hwptr_done + bytes > subs->buffer_bytes) { |
07a40c2f | 1328 | /* err, the transferred area goes over buffer boundary. */ |
d303c5d3 TI |
1329 | unsigned int bytes1 = subs->buffer_bytes - subs->hwptr_done; |
1330 | ||
b97a9369 | 1331 | memcpy(urb->transfer_buffer + offset, |
07a40c2f | 1332 | runtime->dma_area + subs->hwptr_done, bytes1); |
b97a9369 | 1333 | memcpy(urb->transfer_buffer + offset + bytes1, |
07a40c2f RW |
1334 | runtime->dma_area, bytes - bytes1); |
1335 | } else { | |
b97a9369 | 1336 | memcpy(urb->transfer_buffer + offset, |
07a40c2f RW |
1337 | runtime->dma_area + subs->hwptr_done, bytes); |
1338 | } | |
e8a8f09c TI |
1339 | |
1340 | urb_ctx_queue_advance(subs, urb, bytes); | |
07a40c2f RW |
1341 | } |
1342 | ||
e0570446 RW |
1343 | static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs, |
1344 | struct urb *urb, int stride, | |
1345 | unsigned int bytes) | |
1346 | { | |
1347 | __le32 packet_length; | |
1348 | int i; | |
1349 | ||
1350 | /* Put __le32 length descriptor at start of each packet. */ | |
1351 | for (i = 0; i < urb->number_of_packets; i++) { | |
1352 | unsigned int length = urb->iso_frame_desc[i].length; | |
1353 | unsigned int offset = urb->iso_frame_desc[i].offset; | |
1354 | ||
1355 | packet_length = cpu_to_le32(length); | |
1356 | offset += i * sizeof(packet_length); | |
1357 | urb->iso_frame_desc[i].offset = offset; | |
1358 | urb->iso_frame_desc[i].length += sizeof(packet_length); | |
1359 | memcpy(urb->transfer_buffer + offset, | |
1360 | &packet_length, sizeof(packet_length)); | |
1361 | copy_to_urb(subs, urb, offset + sizeof(packet_length), | |
1362 | stride, length); | |
1363 | } | |
1364 | /* Adjust transfer size accordingly. */ | |
1365 | bytes += urb->number_of_packets * sizeof(packet_length); | |
1366 | return bytes; | |
1367 | } | |
1368 | ||
fe1cc9df TI |
1369 | static int prepare_playback_urb(struct snd_usb_substream *subs, |
1370 | struct urb *urb, | |
1371 | bool in_stream_lock) | |
edcd3633 DM |
1372 | { |
1373 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
245baf98 | 1374 | struct snd_usb_endpoint *ep = subs->data_endpoint; |
edcd3633 | 1375 | struct snd_urb_ctx *ctx = urb->context; |
fe1cc9df TI |
1376 | unsigned int frames, bytes; |
1377 | int counts; | |
1378 | unsigned int transfer_done, frame_limit, avail = 0; | |
edcd3633 DM |
1379 | int i, stride, period_elapsed = 0; |
1380 | unsigned long flags; | |
fe1cc9df | 1381 | int err = 0; |
edcd3633 | 1382 | |
d303c5d3 | 1383 | stride = ep->stride; |
edcd3633 DM |
1384 | |
1385 | frames = 0; | |
e8a8f09c | 1386 | ctx->queued = 0; |
edcd3633 | 1387 | urb->number_of_packets = 0; |
fe1cc9df | 1388 | |
edcd3633 | 1389 | spin_lock_irqsave(&subs->lock, flags); |
fe1cc9df TI |
1390 | frame_limit = subs->frame_limit + ep->max_urb_frames; |
1391 | transfer_done = subs->transfer_done; | |
1392 | ||
1393 | if (subs->lowlatency_playback && | |
1394 | runtime->status->state != SNDRV_PCM_STATE_DRAINING) { | |
1395 | unsigned int hwptr = subs->hwptr_done / stride; | |
1396 | ||
1397 | /* calculate the byte offset-in-buffer of the appl_ptr */ | |
1398 | avail = (runtime->control->appl_ptr - runtime->hw_ptr_base) | |
1399 | % runtime->buffer_size; | |
1400 | if (avail <= hwptr) | |
1401 | avail += runtime->buffer_size; | |
1402 | avail -= hwptr; | |
1403 | } | |
1404 | ||
edcd3633 | 1405 | for (i = 0; i < ctx->packets; i++) { |
fe1cc9df TI |
1406 | counts = snd_usb_endpoint_next_packet_size(ep, ctx, i, avail); |
1407 | if (counts < 0) | |
1408 | break; | |
edcd3633 | 1409 | /* set up descriptor */ |
d303c5d3 TI |
1410 | urb->iso_frame_desc[i].offset = frames * stride; |
1411 | urb->iso_frame_desc[i].length = counts * stride; | |
edcd3633 | 1412 | frames += counts; |
fe1cc9df | 1413 | avail -= counts; |
edcd3633 | 1414 | urb->number_of_packets++; |
fe1cc9df TI |
1415 | transfer_done += counts; |
1416 | if (transfer_done >= runtime->period_size) { | |
1417 | transfer_done -= runtime->period_size; | |
1418 | frame_limit = 0; | |
edcd3633 DM |
1419 | period_elapsed = 1; |
1420 | if (subs->fmt_type == UAC_FORMAT_TYPE_II) { | |
fe1cc9df | 1421 | if (transfer_done > 0) { |
edcd3633 DM |
1422 | /* FIXME: fill-max mode is not |
1423 | * supported yet */ | |
fe1cc9df TI |
1424 | frames -= transfer_done; |
1425 | counts -= transfer_done; | |
edcd3633 | 1426 | urb->iso_frame_desc[i].length = |
d303c5d3 | 1427 | counts * stride; |
fe1cc9df | 1428 | transfer_done = 0; |
edcd3633 DM |
1429 | } |
1430 | i++; | |
1431 | if (i < ctx->packets) { | |
1432 | /* add a transfer delimiter */ | |
1433 | urb->iso_frame_desc[i].offset = | |
d303c5d3 | 1434 | frames * stride; |
edcd3633 DM |
1435 | urb->iso_frame_desc[i].length = 0; |
1436 | urb->number_of_packets++; | |
1437 | } | |
1438 | break; | |
1439 | } | |
1440 | } | |
976b6c06 | 1441 | /* finish at the period boundary or after enough frames */ |
fe1cc9df | 1442 | if ((period_elapsed || transfer_done >= frame_limit) && |
976b6c06 | 1443 | !snd_usb_endpoint_implicit_feedback_sink(ep)) |
edcd3633 DM |
1444 | break; |
1445 | } | |
d24f5061 | 1446 | |
fe1cc9df TI |
1447 | if (!frames) { |
1448 | err = -EAGAIN; | |
1449 | goto unlock; | |
1450 | } | |
1451 | ||
1452 | bytes = frames * stride; | |
1453 | subs->transfer_done = transfer_done; | |
1454 | subs->frame_limit = frame_limit; | |
6aa719d1 | 1455 | if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U16_LE && |
d24f5061 DM |
1456 | subs->cur_audiofmt->dsd_dop)) { |
1457 | fill_playback_urb_dsd_dop(subs, urb, bytes); | |
6aa719d1 | 1458 | } else if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U8 && |
44dcbbb1 | 1459 | subs->cur_audiofmt->dsd_bitrev)) { |
4f083917 | 1460 | fill_playback_urb_dsd_bitrev(subs, urb, bytes); |
edcd3633 | 1461 | } else { |
d24f5061 | 1462 | /* usual PCM */ |
e0570446 RW |
1463 | if (!subs->tx_length_quirk) |
1464 | copy_to_urb(subs, urb, 0, stride, bytes); | |
1465 | else | |
1466 | bytes = copy_to_urb_quirk(subs, urb, stride, bytes); | |
1467 | /* bytes is now amount of outgoing data */ | |
edcd3633 | 1468 | } |
d24f5061 | 1469 | |
fbcfbf5f | 1470 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
fbcfbf5f | 1471 | |
ea33d359 PLB |
1472 | if (subs->trigger_tstamp_pending_update) { |
1473 | /* this is the first actual URB submitted, | |
1474 | * update trigger timestamp to reflect actual start time | |
1475 | */ | |
1476 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1477 | subs->trigger_tstamp_pending_update = false; | |
1478 | } | |
1479 | ||
d2a34b93 | 1480 | if (period_elapsed && !subs->running && subs->lowlatency_playback) { |
307cc9ba TI |
1481 | subs->period_elapsed_pending = 1; |
1482 | period_elapsed = 0; | |
1483 | } | |
fe1cc9df TI |
1484 | |
1485 | unlock: | |
edcd3633 | 1486 | spin_unlock_irqrestore(&subs->lock, flags); |
fe1cc9df TI |
1487 | if (err < 0) |
1488 | return err; | |
edcd3633 | 1489 | urb->transfer_buffer_length = bytes; |
fe1cc9df TI |
1490 | if (period_elapsed) { |
1491 | if (in_stream_lock) | |
1492 | snd_pcm_period_elapsed_under_stream_lock(subs->pcm_substream); | |
1493 | else | |
1494 | snd_pcm_period_elapsed(subs->pcm_substream); | |
1495 | } | |
1496 | return 0; | |
edcd3633 DM |
1497 | } |
1498 | ||
1499 | /* | |
1500 | * process after playback data complete | |
1501 | * - decrease the delay count again | |
1502 | */ | |
1503 | static void retire_playback_urb(struct snd_usb_substream *subs, | |
1504 | struct urb *urb) | |
1505 | { | |
1506 | unsigned long flags; | |
e8a8f09c | 1507 | struct snd_urb_ctx *ctx = urb->context; |
307cc9ba | 1508 | bool period_elapsed = false; |
1213a205 | 1509 | |
edcd3633 | 1510 | spin_lock_irqsave(&subs->lock, flags); |
e8a8f09c TI |
1511 | if (ctx->queued) { |
1512 | if (subs->inflight_bytes >= ctx->queued) | |
1513 | subs->inflight_bytes -= ctx->queued; | |
1514 | else | |
1515 | subs->inflight_bytes = 0; | |
48779a0b TI |
1516 | } |
1517 | ||
e8a8f09c | 1518 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
307cc9ba TI |
1519 | if (subs->running) { |
1520 | period_elapsed = subs->period_elapsed_pending; | |
1521 | subs->period_elapsed_pending = 0; | |
1522 | } | |
edcd3633 | 1523 | spin_unlock_irqrestore(&subs->lock, flags); |
307cc9ba TI |
1524 | if (period_elapsed) |
1525 | snd_pcm_period_elapsed(subs->pcm_substream); | |
e5779998 DM |
1526 | } |
1527 | ||
fe1cc9df TI |
1528 | /* PCM ack callback for the playback stream; |
1529 | * this plays a role only when the stream is running in low-latency mode. | |
1530 | */ | |
1531 | static int snd_usb_pcm_playback_ack(struct snd_pcm_substream *substream) | |
1532 | { | |
1533 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
1534 | struct snd_usb_endpoint *ep; | |
1535 | ||
1536 | if (!subs->lowlatency_playback || !subs->running) | |
1537 | return 0; | |
1538 | ep = subs->data_endpoint; | |
1539 | if (!ep) | |
1540 | return 0; | |
1541 | /* When no more in-flight URBs available, try to process the pending | |
1542 | * outputs here | |
1543 | */ | |
1544 | if (!ep->active_mask) | |
1545 | snd_usb_queue_pending_output_urbs(ep, true); | |
1546 | return 0; | |
1547 | } | |
1548 | ||
edcd3633 DM |
1549 | static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, |
1550 | int cmd) | |
1551 | { | |
1552 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
307cc9ba | 1553 | int err; |
edcd3633 DM |
1554 | |
1555 | switch (cmd) { | |
1556 | case SNDRV_PCM_TRIGGER_START: | |
ea33d359 | 1557 | subs->trigger_tstamp_pending_update = true; |
c0dbbdad | 1558 | fallthrough; |
edcd3633 | 1559 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
96e221f3 TI |
1560 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1561 | prepare_playback_urb, | |
1562 | retire_playback_urb, | |
1563 | subs); | |
d2a34b93 | 1564 | if (subs->lowlatency_playback && |
4267c5a8 | 1565 | cmd == SNDRV_PCM_TRIGGER_START) { |
43e6929d TI |
1566 | if (in_free_wheeling_mode(substream->runtime)) |
1567 | subs->lowlatency_playback = false; | |
307cc9ba TI |
1568 | err = start_endpoints(subs); |
1569 | if (err < 0) { | |
1570 | snd_usb_endpoint_set_callback(subs->data_endpoint, | |
1571 | NULL, NULL, NULL); | |
1572 | return err; | |
1573 | } | |
1574 | } | |
97f8d3b6 | 1575 | subs->running = 1; |
bf6313a0 TI |
1576 | dev_dbg(&subs->dev->dev, "%d:%d Start Playback PCM\n", |
1577 | subs->cur_audiofmt->iface, | |
1578 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1579 | return 0; |
75c16b51 | 1580 | case SNDRV_PCM_TRIGGER_SUSPEND: |
edcd3633 | 1581 | case SNDRV_PCM_TRIGGER_STOP: |
5df4219e | 1582 | stop_endpoints(subs, substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING); |
96e221f3 TI |
1583 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1584 | NULL, NULL, NULL); | |
97f8d3b6 | 1585 | subs->running = 0; |
bf6313a0 TI |
1586 | dev_dbg(&subs->dev->dev, "%d:%d Stop Playback PCM\n", |
1587 | subs->cur_audiofmt->iface, | |
1588 | subs->cur_audiofmt->altsetting); | |
edcd3633 DM |
1589 | return 0; |
1590 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
48779a0b | 1591 | /* keep retire_data_urb for delay calculation */ |
96e221f3 TI |
1592 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1593 | NULL, | |
1594 | retire_playback_urb, | |
1595 | subs); | |
97f8d3b6 | 1596 | subs->running = 0; |
bf6313a0 TI |
1597 | dev_dbg(&subs->dev->dev, "%d:%d Pause Playback PCM\n", |
1598 | subs->cur_audiofmt->iface, | |
1599 | subs->cur_audiofmt->altsetting); | |
edcd3633 DM |
1600 | return 0; |
1601 | } | |
1602 | ||
1603 | return -EINVAL; | |
1604 | } | |
1605 | ||
afe25967 DM |
1606 | static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, |
1607 | int cmd) | |
edcd3633 DM |
1608 | { |
1609 | int err; | |
1610 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
1611 | ||
1612 | switch (cmd) { | |
1613 | case SNDRV_PCM_TRIGGER_START: | |
1d0f9530 | 1614 | err = start_endpoints(subs); |
edcd3633 DM |
1615 | if (err < 0) |
1616 | return err; | |
96e221f3 TI |
1617 | fallthrough; |
1618 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
1619 | snd_usb_endpoint_set_callback(subs->data_endpoint, | |
1620 | NULL, retire_capture_urb, | |
1621 | subs); | |
e8a8f09c | 1622 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
97f8d3b6 | 1623 | subs->running = 1; |
bf6313a0 TI |
1624 | dev_dbg(&subs->dev->dev, "%d:%d Start Capture PCM\n", |
1625 | subs->cur_audiofmt->iface, | |
1626 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1627 | return 0; |
75c16b51 | 1628 | case SNDRV_PCM_TRIGGER_SUSPEND: |
edcd3633 | 1629 | case SNDRV_PCM_TRIGGER_STOP: |
5df4219e | 1630 | stop_endpoints(subs, false); |
96e221f3 | 1631 | fallthrough; |
edcd3633 | 1632 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
96e221f3 TI |
1633 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1634 | NULL, NULL, NULL); | |
97f8d3b6 | 1635 | subs->running = 0; |
bf6313a0 TI |
1636 | dev_dbg(&subs->dev->dev, "%d:%d Stop Capture PCM\n", |
1637 | subs->cur_audiofmt->iface, | |
1638 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1639 | return 0; |
edcd3633 DM |
1640 | } |
1641 | ||
1642 | return -EINVAL; | |
1643 | } | |
1644 | ||
31cb1fb4 | 1645 | static const struct snd_pcm_ops snd_usb_playback_ops = { |
6fddc797 TI |
1646 | .open = snd_usb_pcm_open, |
1647 | .close = snd_usb_pcm_close, | |
e5779998 DM |
1648 | .hw_params = snd_usb_hw_params, |
1649 | .hw_free = snd_usb_hw_free, | |
1650 | .prepare = snd_usb_pcm_prepare, | |
1651 | .trigger = snd_usb_substream_playback_trigger, | |
dc5eafe7 | 1652 | .sync_stop = snd_usb_pcm_sync_stop, |
e5779998 | 1653 | .pointer = snd_usb_pcm_pointer, |
fe1cc9df | 1654 | .ack = snd_usb_pcm_playback_ack, |
e5779998 DM |
1655 | }; |
1656 | ||
31cb1fb4 | 1657 | static const struct snd_pcm_ops snd_usb_capture_ops = { |
6fddc797 TI |
1658 | .open = snd_usb_pcm_open, |
1659 | .close = snd_usb_pcm_close, | |
e5779998 DM |
1660 | .hw_params = snd_usb_hw_params, |
1661 | .hw_free = snd_usb_hw_free, | |
1662 | .prepare = snd_usb_pcm_prepare, | |
1663 | .trigger = snd_usb_substream_capture_trigger, | |
dc5eafe7 | 1664 | .sync_stop = snd_usb_pcm_sync_stop, |
e5779998 | 1665 | .pointer = snd_usb_pcm_pointer, |
f274baa4 TI |
1666 | }; |
1667 | ||
e5779998 DM |
1668 | void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) |
1669 | { | |
f274baa4 TI |
1670 | const struct snd_pcm_ops *ops; |
1671 | ||
b315997d | 1672 | ops = stream == SNDRV_PCM_STREAM_PLAYBACK ? |
f274baa4 | 1673 | &snd_usb_playback_ops : &snd_usb_capture_ops; |
f274baa4 TI |
1674 | snd_pcm_set_ops(pcm, stream, ops); |
1675 | } | |
1676 | ||
1677 | void snd_usb_preallocate_buffer(struct snd_usb_substream *subs) | |
1678 | { | |
1679 | struct snd_pcm *pcm = subs->stream->pcm; | |
1680 | struct snd_pcm_substream *s = pcm->streams[subs->direction].substream; | |
fb3c293b | 1681 | struct device *dev = subs->dev->bus->sysdev; |
f274baa4 | 1682 | |
b315997d | 1683 | if (snd_usb_use_vmalloc) |
6dd9486c TI |
1684 | snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_VMALLOC, |
1685 | NULL, 0, 0); | |
b315997d | 1686 | else |
6dd9486c TI |
1687 | snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_DEV_SG, |
1688 | dev, 64*1024, 512*1024); | |
e5779998 | 1689 | } |