Commit | Line | Data |
---|---|---|
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 | ||
fd28941c JK |
160 | bool snd_usb_pcm_has_fixed_rate(struct snd_usb_substream *subs) |
161 | { | |
162 | const struct audioformat *fp; | |
163 | struct snd_usb_audio *chip = subs->stream->chip; | |
164 | int rate = -1; | |
165 | ||
166 | if (!(chip->quirk_flags & QUIRK_FLAG_FIXED_RATE)) | |
167 | return false; | |
168 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
169 | if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) | |
170 | return false; | |
171 | if (fp->nr_rates < 1) | |
172 | continue; | |
173 | if (fp->nr_rates > 1) | |
174 | return false; | |
175 | if (rate < 0) { | |
176 | rate = fp->rate_table[0]; | |
177 | continue; | |
178 | } | |
179 | if (rate != fp->rate_table[0]) | |
180 | return false; | |
181 | } | |
182 | return true; | |
183 | } | |
184 | ||
bf6313a0 | 185 | static int init_pitch_v1(struct snd_usb_audio *chip, int ep) |
767d75ad DM |
186 | { |
187 | struct usb_device *dev = chip->dev; | |
767d75ad DM |
188 | unsigned char data[1]; |
189 | int err; | |
190 | ||
767d75ad | 191 | data[0] = 1; |
f25ecf8f TI |
192 | err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, |
193 | USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, | |
194 | UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, | |
195 | data, sizeof(data)); | |
bf6313a0 | 196 | return err; |
767d75ad | 197 | } |
e5779998 | 198 | |
bf6313a0 | 199 | static int init_pitch_v2(struct snd_usb_audio *chip, int ep) |
92c25611 DM |
200 | { |
201 | struct usb_device *dev = chip->dev; | |
202 | unsigned char data[1]; | |
92c25611 DM |
203 | int err; |
204 | ||
92c25611 | 205 | data[0] = 1; |
f25ecf8f TI |
206 | err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, |
207 | USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, | |
208 | UAC2_EP_CS_PITCH << 8, 0, | |
209 | data, sizeof(data)); | |
bf6313a0 | 210 | return err; |
92c25611 DM |
211 | } |
212 | ||
e5779998 | 213 | /* |
92c25611 | 214 | * initialize the pitch control and sample rate |
e5779998 | 215 | */ |
73037c8d | 216 | int snd_usb_init_pitch(struct snd_usb_audio *chip, |
cab941b7 | 217 | const struct audioformat *fmt) |
e5779998 | 218 | { |
bf6313a0 TI |
219 | int err; |
220 | ||
92c25611 DM |
221 | /* if endpoint doesn't have pitch control, bail out */ |
222 | if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) | |
223 | return 0; | |
224 | ||
bf6313a0 TI |
225 | usb_audio_dbg(chip, "enable PITCH for EP 0x%x\n", fmt->endpoint); |
226 | ||
8f898e92 | 227 | switch (fmt->protocol) { |
767d75ad | 228 | case UAC_VERSION_1: |
bf6313a0 TI |
229 | err = init_pitch_v1(chip, fmt->endpoint); |
230 | break; | |
231 | case UAC_VERSION_2: | |
232 | err = init_pitch_v2(chip, fmt->endpoint); | |
233 | break; | |
a2acad82 | 234 | default: |
bf6313a0 TI |
235 | return 0; |
236 | } | |
767d75ad | 237 | |
bf6313a0 TI |
238 | if (err < 0) { |
239 | usb_audio_err(chip, "failed to enable PITCH for EP 0x%x\n", | |
240 | fmt->endpoint); | |
241 | return err; | |
767d75ad | 242 | } |
bf6313a0 TI |
243 | |
244 | return 0; | |
767d75ad DM |
245 | } |
246 | ||
813a17ca | 247 | static bool stop_endpoints(struct snd_usb_substream *subs, bool keep_pending) |
57234bc1 | 248 | { |
bf6313a0 TI |
249 | bool stopped = 0; |
250 | ||
57234bc1 | 251 | if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { |
813a17ca | 252 | snd_usb_endpoint_stop(subs->sync_endpoint, keep_pending); |
bf6313a0 | 253 | stopped = true; |
57234bc1 | 254 | } |
bf6313a0 | 255 | if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { |
813a17ca | 256 | snd_usb_endpoint_stop(subs->data_endpoint, keep_pending); |
bf6313a0 TI |
257 | stopped = true; |
258 | } | |
259 | return stopped; | |
57234bc1 TI |
260 | } |
261 | ||
1d0f9530 | 262 | static int start_endpoints(struct snd_usb_substream *subs) |
edcd3633 DM |
263 | { |
264 | int err; | |
265 | ||
266 | if (!subs->data_endpoint) | |
267 | return -EINVAL; | |
268 | ||
269 | if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { | |
bf6313a0 | 270 | err = snd_usb_endpoint_start(subs->data_endpoint); |
edcd3633 DM |
271 | if (err < 0) { |
272 | clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags); | |
57234bc1 | 273 | goto error; |
edcd3633 DM |
274 | } |
275 | } | |
276 | ||
277 | if (subs->sync_endpoint && | |
278 | !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { | |
bf6313a0 | 279 | err = snd_usb_endpoint_start(subs->sync_endpoint); |
edcd3633 DM |
280 | if (err < 0) { |
281 | clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); | |
57234bc1 | 282 | goto error; |
edcd3633 DM |
283 | } |
284 | } | |
285 | ||
286 | return 0; | |
57234bc1 TI |
287 | |
288 | error: | |
813a17ca | 289 | stop_endpoints(subs, false); |
57234bc1 | 290 | return err; |
edcd3633 DM |
291 | } |
292 | ||
dc5eafe7 TI |
293 | static void sync_pending_stops(struct snd_usb_substream *subs) |
294 | { | |
295 | snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint); | |
296 | snd_usb_endpoint_sync_pending_stop(subs->data_endpoint); | |
297 | } | |
298 | ||
dc5eafe7 TI |
299 | /* PCM sync_stop callback */ |
300 | static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream) | |
301 | { | |
302 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
303 | ||
257d2d7e | 304 | sync_pending_stops(subs); |
dc5eafe7 | 305 | return 0; |
edcd3633 DM |
306 | } |
307 | ||
9fddc15e | 308 | /* Set up sync endpoint */ |
f6581c0e TI |
309 | int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip, |
310 | struct audioformat *fmt) | |
a60945fd | 311 | { |
f6581c0e | 312 | struct usb_device *dev = chip->dev; |
f6581c0e TI |
313 | struct usb_host_interface *alts; |
314 | struct usb_interface_descriptor *altsd; | |
315 | unsigned int ep, attr, sync_attr; | |
316 | bool is_playback; | |
a60945fd EZ |
317 | int err; |
318 | ||
e0469d65 TI |
319 | if (fmt->sync_ep) |
320 | return 0; /* already set up */ | |
321 | ||
e42a09bc | 322 | alts = snd_usb_get_host_interface(chip, fmt->iface, fmt->altsetting); |
f6581c0e | 323 | if (!alts) |
2bc16b9f | 324 | return 0; |
f6581c0e TI |
325 | altsd = get_iface_desc(alts); |
326 | ||
9fddc15e TI |
327 | err = snd_usb_parse_implicit_fb_quirk(chip, fmt, alts); |
328 | if (err > 0) | |
329 | return 0; /* matched */ | |
330 | ||
331 | /* | |
332 | * Generic sync EP handling | |
333 | */ | |
2bc16b9f | 334 | |
efb75df1 | 335 | if (fmt->ep_idx > 0 || altsd->bNumEndpoints < 2) |
f34d0650 | 336 | return 0; |
c75a8a7a | 337 | |
9fddc15e | 338 | is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN); |
f6581c0e | 339 | attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; |
395ae54b PLB |
340 | if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC || |
341 | attr == USB_ENDPOINT_SYNC_ADAPTIVE)) || | |
f34d0650 EZ |
342 | (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE)) |
343 | return 0; | |
edcd3633 | 344 | |
f6581c0e TI |
345 | sync_attr = get_endpoint(alts, 1)->bmAttributes; |
346 | ||
395ae54b PLB |
347 | /* |
348 | * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see | |
349 | * if we don't find a sync endpoint, as on M-Audio Transit. In case of | |
350 | * error fall back to SYNC mode and don't create sync endpoint | |
351 | */ | |
352 | ||
f34d0650 EZ |
353 | /* check sync-pipe endpoint */ |
354 | /* ... and check descriptor size before accessing bSynchAddress | |
355 | because there is a version of the SB Audigy 2 NX firmware lacking | |
356 | the audio fields in the endpoint descriptors */ | |
f6581c0e | 357 | if ((sync_attr & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC || |
f34d0650 | 358 | (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
95fec883 | 359 | get_endpoint(alts, 1)->bSynchAddress != 0)) { |
0ba41d91 TI |
360 | dev_err(&dev->dev, |
361 | "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n", | |
362 | fmt->iface, fmt->altsetting, | |
f34d0650 EZ |
363 | get_endpoint(alts, 1)->bmAttributes, |
364 | get_endpoint(alts, 1)->bLength, | |
365 | get_endpoint(alts, 1)->bSynchAddress); | |
395ae54b PLB |
366 | if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) |
367 | return 0; | |
f34d0650 EZ |
368 | return -EINVAL; |
369 | } | |
370 | ep = get_endpoint(alts, 1)->bEndpointAddress; | |
95fec883 | 371 | if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
1b34121d | 372 | get_endpoint(alts, 0)->bSynchAddress != 0 && |
f34d0650 EZ |
373 | ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || |
374 | (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { | |
0ba41d91 TI |
375 | dev_err(&dev->dev, |
376 | "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n", | |
377 | fmt->iface, fmt->altsetting, | |
f34d0650 | 378 | is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); |
395ae54b PLB |
379 | if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) |
380 | return 0; | |
f34d0650 | 381 | return -EINVAL; |
edcd3633 | 382 | } |
e5779998 | 383 | |
f6581c0e TI |
384 | fmt->sync_ep = ep; |
385 | fmt->sync_iface = altsd->bInterfaceNumber; | |
386 | fmt->sync_altsetting = altsd->bAlternateSetting; | |
bf6313a0 | 387 | fmt->sync_ep_idx = 1; |
f6581c0e TI |
388 | if ((sync_attr & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB) |
389 | fmt->implicit_fb = 1; | |
390 | ||
391 | dev_dbg(&dev->dev, "%d:%d: found sync_ep=0x%x, iface=%d, alt=%d, implicit_fb=%d\n", | |
392 | fmt->iface, fmt->altsetting, fmt->sync_ep, fmt->sync_iface, | |
393 | fmt->sync_altsetting, fmt->implicit_fb); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
3f59aa11 JS |
398 | static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state) |
399 | { | |
400 | int ret; | |
401 | ||
402 | if (!subs->str_pd) | |
403 | return 0; | |
404 | ||
405 | ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state); | |
406 | if (ret < 0) { | |
407 | dev_err(&subs->dev->dev, | |
408 | "Cannot change Power Domain ID: %d to state: %d. Err: %d\n", | |
409 | subs->str_pd->pd_id, state, ret); | |
410 | return ret; | |
411 | } | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
416 | int snd_usb_pcm_suspend(struct snd_usb_stream *as) | |
417 | { | |
418 | int ret; | |
419 | ||
420 | ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2); | |
421 | if (ret < 0) | |
422 | return ret; | |
423 | ||
424 | ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2); | |
425 | if (ret < 0) | |
426 | return ret; | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | int snd_usb_pcm_resume(struct snd_usb_stream *as) | |
432 | { | |
433 | int ret; | |
434 | ||
a0a4959e | 435 | ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1); |
3f59aa11 JS |
436 | if (ret < 0) |
437 | return ret; | |
438 | ||
a0a4959e | 439 | ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1); |
3f59aa11 JS |
440 | if (ret < 0) |
441 | return ret; | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
bf6313a0 TI |
446 | static void close_endpoints(struct snd_usb_audio *chip, |
447 | struct snd_usb_substream *subs) | |
448 | { | |
449 | if (subs->data_endpoint) { | |
450 | snd_usb_endpoint_set_sync(chip, subs->data_endpoint, NULL); | |
451 | snd_usb_endpoint_close(chip, subs->data_endpoint); | |
452 | subs->data_endpoint = NULL; | |
453 | } | |
454 | ||
455 | if (subs->sync_endpoint) { | |
456 | snd_usb_endpoint_close(chip, subs->sync_endpoint); | |
457 | subs->sync_endpoint = NULL; | |
458 | } | |
459 | } | |
460 | ||
e5779998 DM |
461 | /* |
462 | * hw_params callback | |
463 | * | |
464 | * allocate a buffer and set the given audio format. | |
465 | * | |
466 | * so far we use a physically linear buffer although packetize transfer | |
467 | * doesn't need a continuous area. | |
468 | * if sg buffer is supported on the later version of alsa, we'll follow | |
469 | * that. | |
470 | */ | |
471 | static int snd_usb_hw_params(struct snd_pcm_substream *substream, | |
472 | struct snd_pcm_hw_params *hw_params) | |
473 | { | |
474 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
bf6313a0 | 475 | struct snd_usb_audio *chip = subs->stream->chip; |
cab941b7 TI |
476 | const struct audioformat *fmt; |
477 | const struct audioformat *sync_fmt; | |
fd28941c | 478 | bool fixed_rate, sync_fixed_rate; |
61a70950 | 479 | int ret; |
e5779998 | 480 | |
66354f18 SK |
481 | ret = snd_media_start_pipeline(subs); |
482 | if (ret) | |
483 | return ret; | |
484 | ||
fd28941c | 485 | fixed_rate = snd_usb_pcm_has_fixed_rate(subs); |
bf6313a0 | 486 | fmt = find_substream_format(subs, hw_params); |
e5779998 | 487 | if (!fmt) { |
bf6313a0 TI |
488 | usb_audio_dbg(chip, |
489 | "cannot find format: format=%s, rate=%d, channels=%d\n", | |
490 | snd_pcm_format_name(params_format(hw_params)), | |
491 | params_rate(hw_params), params_channels(hw_params)); | |
66354f18 SK |
492 | ret = -EINVAL; |
493 | goto stop_pipeline; | |
e5779998 DM |
494 | } |
495 | ||
9fddc15e TI |
496 | if (fmt->implicit_fb) { |
497 | sync_fmt = snd_usb_find_implicit_fb_sync_format(chip, fmt, | |
498 | hw_params, | |
fd28941c JK |
499 | !substream->stream, |
500 | &sync_fixed_rate); | |
bf6313a0 TI |
501 | if (!sync_fmt) { |
502 | usb_audio_dbg(chip, | |
503 | "cannot find sync format: ep=0x%x, iface=%d:%d, format=%s, rate=%d, channels=%d\n", | |
504 | fmt->sync_ep, fmt->sync_iface, | |
505 | fmt->sync_altsetting, | |
506 | snd_pcm_format_name(params_format(hw_params)), | |
507 | params_rate(hw_params), params_channels(hw_params)); | |
508 | ret = -EINVAL; | |
509 | goto stop_pipeline; | |
510 | } | |
511 | } else { | |
512 | sync_fmt = fmt; | |
fd28941c | 513 | sync_fixed_rate = fixed_rate; |
bf6313a0 TI |
514 | } |
515 | ||
516 | ret = snd_usb_lock_shutdown(chip); | |
47ab1545 | 517 | if (ret < 0) |
66354f18 | 518 | goto stop_pipeline; |
a0a4959e JS |
519 | |
520 | ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); | |
521 | if (ret < 0) | |
522 | goto unlock; | |
523 | ||
bf6313a0 TI |
524 | if (subs->data_endpoint) { |
525 | if (snd_usb_endpoint_compatible(chip, subs->data_endpoint, | |
526 | fmt, hw_params)) | |
527 | goto unlock; | |
0599313e TI |
528 | if (stop_endpoints(subs, false)) |
529 | sync_pending_stops(subs); | |
bf6313a0 TI |
530 | close_endpoints(chip, subs); |
531 | } | |
532 | ||
fd28941c | 533 | subs->data_endpoint = snd_usb_endpoint_open(chip, fmt, hw_params, false, fixed_rate); |
bf6313a0 TI |
534 | if (!subs->data_endpoint) { |
535 | ret = -EINVAL; | |
536 | goto unlock; | |
537 | } | |
538 | ||
539 | if (fmt->sync_ep) { | |
540 | subs->sync_endpoint = snd_usb_endpoint_open(chip, sync_fmt, | |
541 | hw_params, | |
fd28941c JK |
542 | fmt == sync_fmt, |
543 | sync_fixed_rate); | |
bf6313a0 TI |
544 | if (!subs->sync_endpoint) { |
545 | ret = -EINVAL; | |
546 | goto unlock; | |
547 | } | |
548 | ||
549 | snd_usb_endpoint_set_sync(chip, subs->data_endpoint, | |
550 | subs->sync_endpoint); | |
551 | } | |
552 | ||
6aa719d1 | 553 | mutex_lock(&chip->mutex); |
bf6313a0 | 554 | subs->cur_audiofmt = fmt; |
6aa719d1 | 555 | mutex_unlock(&chip->mutex); |
bf6313a0 | 556 | |
2be79d58 TI |
557 | if (!subs->data_endpoint->need_setup) |
558 | goto unlock; | |
559 | ||
560 | if (subs->sync_endpoint) { | |
561 | ret = snd_usb_endpoint_set_params(chip, subs->sync_endpoint); | |
562 | if (ret < 0) | |
563 | goto unlock; | |
564 | } | |
565 | ||
566 | ret = snd_usb_endpoint_set_params(chip, subs->data_endpoint); | |
bf6313a0 | 567 | |
a0a4959e | 568 | unlock: |
66354f18 | 569 | if (ret < 0) |
bf6313a0 | 570 | close_endpoints(chip, subs); |
66354f18 | 571 | |
bf6313a0 | 572 | snd_usb_unlock_shutdown(chip); |
66354f18 | 573 | stop_pipeline: |
bf6313a0 TI |
574 | if (ret < 0) |
575 | snd_media_stop_pipeline(subs); | |
576 | ||
a0a4959e | 577 | return ret; |
e5779998 DM |
578 | } |
579 | ||
580 | /* | |
581 | * hw_free callback | |
582 | * | |
583 | * reset the audio format and release the buffer | |
584 | */ | |
585 | static int snd_usb_hw_free(struct snd_pcm_substream *substream) | |
586 | { | |
587 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
5a6c3e11 | 588 | struct snd_usb_audio *chip = subs->stream->chip; |
e5779998 | 589 | |
66354f18 | 590 | snd_media_stop_pipeline(subs); |
6aa719d1 | 591 | mutex_lock(&chip->mutex); |
e5779998 | 592 | subs->cur_audiofmt = NULL; |
6aa719d1 | 593 | mutex_unlock(&chip->mutex); |
5a6c3e11 | 594 | if (!snd_usb_lock_shutdown(chip)) { |
813a17ca | 595 | if (stop_endpoints(subs, false)) |
bf6313a0 TI |
596 | sync_pending_stops(subs); |
597 | close_endpoints(chip, subs); | |
5a6c3e11 | 598 | snd_usb_unlock_shutdown(chip); |
978520b7 | 599 | } |
f274baa4 | 600 | |
6dd9486c | 601 | return 0; |
e5779998 DM |
602 | } |
603 | ||
eee5d6f1 TI |
604 | /* free-wheeling mode? (e.g. dmix) */ |
605 | static int in_free_wheeling_mode(struct snd_pcm_runtime *runtime) | |
606 | { | |
607 | return runtime->stop_threshold > runtime->buffer_size; | |
608 | } | |
609 | ||
9c9a3b9d | 610 | /* check whether early start is needed for playback stream */ |
e581f1ce TI |
611 | static int lowlatency_playback_available(struct snd_pcm_runtime *runtime, |
612 | struct snd_usb_substream *subs) | |
9c9a3b9d TI |
613 | { |
614 | struct snd_usb_audio *chip = subs->stream->chip; | |
615 | ||
616 | if (subs->direction == SNDRV_PCM_STREAM_CAPTURE) | |
617 | return false; | |
618 | /* disabled via module option? */ | |
619 | if (!chip->lowlatency) | |
620 | return false; | |
eee5d6f1 | 621 | if (in_free_wheeling_mode(runtime)) |
e581f1ce | 622 | return false; |
bceee753 TI |
623 | /* implicit feedback mode has own operation mode */ |
624 | if (snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint)) | |
625 | return false; | |
9c9a3b9d TI |
626 | return true; |
627 | } | |
628 | ||
e5779998 DM |
629 | /* |
630 | * prepare callback | |
631 | * | |
632 | * only a few subtle things... | |
633 | */ | |
634 | static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) | |
635 | { | |
636 | struct snd_pcm_runtime *runtime = substream->runtime; | |
637 | struct snd_usb_substream *subs = runtime->private_data; | |
bf6313a0 | 638 | struct snd_usb_audio *chip = subs->stream->chip; |
198dde08 | 639 | int retry = 0; |
61a70950 | 640 | int ret; |
e5779998 | 641 | |
bf6313a0 | 642 | ret = snd_usb_lock_shutdown(chip); |
47ab1545 TI |
643 | if (ret < 0) |
644 | return ret; | |
978520b7 TI |
645 | if (snd_BUG_ON(!subs->data_endpoint)) { |
646 | ret = -EIO; | |
647 | goto unlock; | |
648 | } | |
edcd3633 | 649 | |
198dde08 | 650 | again: |
2be79d58 TI |
651 | if (subs->sync_endpoint) { |
652 | ret = snd_usb_endpoint_prepare(chip, subs->sync_endpoint); | |
653 | if (ret < 0) | |
654 | goto unlock; | |
655 | } | |
656 | ||
657 | ret = snd_usb_endpoint_prepare(chip, subs->data_endpoint); | |
61a70950 | 658 | if (ret < 0) |
978520b7 | 659 | goto unlock; |
2be79d58 TI |
660 | else if (ret > 0) |
661 | snd_usb_set_format_quirk(subs, subs->cur_audiofmt); | |
662 | ret = 0; | |
61a70950 | 663 | |
e5779998 | 664 | /* reset the pointer */ |
d303c5d3 | 665 | subs->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size); |
e8a8f09c | 666 | subs->inflight_bytes = 0; |
e5779998 DM |
667 | subs->hwptr_done = 0; |
668 | subs->transfer_done = 0; | |
294c4fb8 | 669 | subs->last_frame_number = 0; |
307cc9ba | 670 | subs->period_elapsed_pending = 0; |
e5779998 DM |
671 | runtime->delay = 0; |
672 | ||
e581f1ce | 673 | subs->lowlatency_playback = lowlatency_playback_available(runtime, subs); |
83de8f83 | 674 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
198dde08 | 675 | !subs->lowlatency_playback) { |
4267c5a8 | 676 | ret = start_endpoints(subs); |
198dde08 TI |
677 | /* if XRUN happens at starting streams (possibly with implicit |
678 | * fb case), restart again, but only try once. | |
679 | */ | |
680 | if (ret == -EPIPE && !retry++) { | |
681 | sync_pending_stops(subs); | |
682 | goto again; | |
683 | } | |
684 | } | |
978520b7 | 685 | unlock: |
bf6313a0 | 686 | snd_usb_unlock_shutdown(chip); |
978520b7 | 687 | return ret; |
e5779998 DM |
688 | } |
689 | ||
7ec827b9 TI |
690 | /* |
691 | * h/w constraints | |
692 | */ | |
693 | ||
694 | #ifdef HW_CONST_DEBUG | |
695 | #define hwc_debug(fmt, args...) pr_debug(fmt, ##args) | |
696 | #else | |
697 | #define hwc_debug(fmt, args...) do { } while(0) | |
698 | #endif | |
699 | ||
aaffbf78 | 700 | static const struct snd_pcm_hardware snd_usb_hardware = |
e5779998 DM |
701 | { |
702 | .info = SNDRV_PCM_INFO_MMAP | | |
703 | SNDRV_PCM_INFO_MMAP_VALID | | |
704 | SNDRV_PCM_INFO_BATCH | | |
705 | SNDRV_PCM_INFO_INTERLEAVED | | |
706 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
707 | SNDRV_PCM_INFO_PAUSE, | |
bf6313a0 TI |
708 | .channels_min = 1, |
709 | .channels_max = 256, | |
24d0c9f0 | 710 | .buffer_bytes_max = INT_MAX, /* limited by BUFFER_TIME later */ |
e5779998 | 711 | .period_bytes_min = 64, |
24d0c9f0 | 712 | .period_bytes_max = INT_MAX, /* limited by PERIOD_TIME later */ |
e5779998 DM |
713 | .periods_min = 2, |
714 | .periods_max = 1024, | |
715 | }; | |
716 | ||
717 | static int hw_check_valid_format(struct snd_usb_substream *subs, | |
718 | struct snd_pcm_hw_params *params, | |
cab941b7 | 719 | const struct audioformat *fp) |
e5779998 DM |
720 | { |
721 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
722 | struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
723 | struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
724 | struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); | |
015eb0b0 | 725 | struct snd_mask check_fmts; |
e5779998 DM |
726 | unsigned int ptime; |
727 | ||
728 | /* check the format */ | |
015eb0b0 CL |
729 | snd_mask_none(&check_fmts); |
730 | check_fmts.bits[0] = (u32)fp->formats; | |
731 | check_fmts.bits[1] = (u32)(fp->formats >> 32); | |
732 | snd_mask_intersect(&check_fmts, fmts); | |
733 | if (snd_mask_empty(&check_fmts)) { | |
e4ea77f8 | 734 | hwc_debug(" > check: no supported format 0x%llx\n", fp->formats); |
e5779998 DM |
735 | return 0; |
736 | } | |
737 | /* check the channels */ | |
738 | if (fp->channels < ct->min || fp->channels > ct->max) { | |
739 | hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); | |
740 | return 0; | |
741 | } | |
742 | /* check the rate is within the range */ | |
743 | if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { | |
744 | hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); | |
745 | return 0; | |
746 | } | |
747 | if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { | |
748 | hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); | |
749 | return 0; | |
750 | } | |
751 | /* check whether the period time is >= the data packet interval */ | |
978520b7 | 752 | if (subs->speed != USB_SPEED_FULL) { |
e5779998 DM |
753 | ptime = 125 * (1 << fp->datainterval); |
754 | if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { | |
755 | hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); | |
756 | return 0; | |
757 | } | |
758 | } | |
759 | return 1; | |
760 | } | |
761 | ||
7726dce1 TI |
762 | static int apply_hw_params_minmax(struct snd_interval *it, unsigned int rmin, |
763 | unsigned int rmax) | |
764 | { | |
765 | int changed; | |
766 | ||
767 | if (rmin > rmax) { | |
768 | hwc_debug(" --> get empty\n"); | |
769 | it->empty = 1; | |
770 | return -EINVAL; | |
771 | } | |
772 | ||
773 | changed = 0; | |
774 | if (it->min < rmin) { | |
775 | it->min = rmin; | |
776 | it->openmin = 0; | |
777 | changed = 1; | |
778 | } | |
779 | if (it->max > rmax) { | |
780 | it->max = rmax; | |
781 | it->openmax = 0; | |
782 | changed = 1; | |
783 | } | |
784 | if (snd_interval_checkempty(it)) { | |
785 | it->empty = 1; | |
786 | return -EINVAL; | |
787 | } | |
788 | hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); | |
789 | return changed; | |
790 | } | |
791 | ||
e5779998 DM |
792 | static int hw_rule_rate(struct snd_pcm_hw_params *params, |
793 | struct snd_pcm_hw_rule *rule) | |
794 | { | |
795 | struct snd_usb_substream *subs = rule->private; | |
4e7cf1fb | 796 | struct snd_usb_audio *chip = subs->stream->chip; |
cab941b7 | 797 | const struct audioformat *fp; |
e5779998 | 798 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
bc4e94aa | 799 | unsigned int rmin, rmax, r; |
bc4e94aa | 800 | int i; |
e5779998 DM |
801 | |
802 | hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); | |
bc4e94aa TI |
803 | rmin = UINT_MAX; |
804 | rmax = 0; | |
88766f04 | 805 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
806 | if (!hw_check_valid_format(subs, params, fp)) |
807 | continue; | |
4e7cf1fb TI |
808 | r = snd_usb_endpoint_get_clock_rate(chip, fp->clock); |
809 | if (r > 0) { | |
810 | if (!snd_interval_test(it, r)) | |
811 | continue; | |
812 | rmin = min(rmin, r); | |
813 | rmax = max(rmax, r); | |
814 | continue; | |
815 | } | |
bc4e94aa TI |
816 | if (fp->rate_table && fp->nr_rates) { |
817 | for (i = 0; i < fp->nr_rates; i++) { | |
818 | r = fp->rate_table[i]; | |
819 | if (!snd_interval_test(it, r)) | |
820 | continue; | |
821 | rmin = min(rmin, r); | |
822 | rmax = max(rmax, r); | |
823 | } | |
e5779998 | 824 | } else { |
bc4e94aa TI |
825 | rmin = min(rmin, fp->rate_min); |
826 | rmax = max(rmax, fp->rate_max); | |
e5779998 DM |
827 | } |
828 | } | |
829 | ||
7726dce1 | 830 | return apply_hw_params_minmax(it, rmin, rmax); |
e5779998 DM |
831 | } |
832 | ||
833 | ||
834 | static int hw_rule_channels(struct snd_pcm_hw_params *params, | |
835 | struct snd_pcm_hw_rule *rule) | |
836 | { | |
837 | struct snd_usb_substream *subs = rule->private; | |
cab941b7 | 838 | const struct audioformat *fp; |
e5779998 DM |
839 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
840 | unsigned int rmin, rmax; | |
e5779998 DM |
841 | |
842 | hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); | |
7726dce1 TI |
843 | rmin = UINT_MAX; |
844 | rmax = 0; | |
88766f04 | 845 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
846 | if (!hw_check_valid_format(subs, params, fp)) |
847 | continue; | |
7726dce1 TI |
848 | rmin = min(rmin, fp->channels); |
849 | rmax = max(rmax, fp->channels); | |
e5779998 DM |
850 | } |
851 | ||
7726dce1 | 852 | return apply_hw_params_minmax(it, rmin, rmax); |
e5779998 DM |
853 | } |
854 | ||
e4ea77f8 | 855 | static int apply_hw_params_format_bits(struct snd_mask *fmt, u64 fbits) |
e5779998 | 856 | { |
e5779998 DM |
857 | u32 oldbits[2]; |
858 | int changed; | |
859 | ||
e5779998 DM |
860 | oldbits[0] = fmt->bits[0]; |
861 | oldbits[1] = fmt->bits[1]; | |
862 | fmt->bits[0] &= (u32)fbits; | |
863 | fmt->bits[1] &= (u32)(fbits >> 32); | |
864 | if (!fmt->bits[0] && !fmt->bits[1]) { | |
865 | hwc_debug(" --> get empty\n"); | |
866 | return -EINVAL; | |
867 | } | |
868 | changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); | |
869 | hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); | |
870 | return changed; | |
871 | } | |
872 | ||
e4ea77f8 TI |
873 | static int hw_rule_format(struct snd_pcm_hw_params *params, |
874 | struct snd_pcm_hw_rule *rule) | |
875 | { | |
876 | struct snd_usb_substream *subs = rule->private; | |
877 | const struct audioformat *fp; | |
878 | struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
879 | u64 fbits; | |
880 | ||
881 | hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); | |
882 | fbits = 0; | |
883 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
884 | if (!hw_check_valid_format(subs, params, fp)) | |
885 | continue; | |
886 | fbits |= fp->formats; | |
887 | } | |
888 | return apply_hw_params_format_bits(fmt, fbits); | |
889 | } | |
890 | ||
e5779998 DM |
891 | static int hw_rule_period_time(struct snd_pcm_hw_params *params, |
892 | struct snd_pcm_hw_rule *rule) | |
893 | { | |
894 | struct snd_usb_substream *subs = rule->private; | |
cab941b7 | 895 | const struct audioformat *fp; |
e5779998 DM |
896 | struct snd_interval *it; |
897 | unsigned char min_datainterval; | |
898 | unsigned int pmin; | |
e5779998 DM |
899 | |
900 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); | |
901 | hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); | |
902 | min_datainterval = 0xff; | |
903 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
904 | if (!hw_check_valid_format(subs, params, fp)) | |
905 | continue; | |
906 | min_datainterval = min(min_datainterval, fp->datainterval); | |
907 | } | |
908 | if (min_datainterval == 0xff) { | |
a7ce2e0d | 909 | hwc_debug(" --> get empty\n"); |
e5779998 DM |
910 | it->empty = 1; |
911 | return -EINVAL; | |
912 | } | |
913 | pmin = 125 * (1 << min_datainterval); | |
7726dce1 TI |
914 | |
915 | return apply_hw_params_minmax(it, pmin, UINT_MAX); | |
e5779998 DM |
916 | } |
917 | ||
e4ea77f8 TI |
918 | /* get the EP or the sync EP for implicit fb when it's already set up */ |
919 | static const struct snd_usb_endpoint * | |
920 | get_sync_ep_from_substream(struct snd_usb_substream *subs) | |
5a6c3e11 TI |
921 | { |
922 | struct snd_usb_audio *chip = subs->stream->chip; | |
cab941b7 | 923 | const struct audioformat *fp; |
e4ea77f8 | 924 | const struct snd_usb_endpoint *ep; |
5a6c3e11 | 925 | |
5a6c3e11 | 926 | list_for_each_entry(fp, &subs->fmt_list, list) { |
54cb3190 | 927 | ep = snd_usb_get_endpoint(chip, fp->endpoint); |
5f5e6a3e TI |
928 | if (ep && ep->cur_audiofmt) { |
929 | /* if EP is already opened solely for this substream, | |
930 | * we still allow us to change the parameter; otherwise | |
931 | * this substream has to follow the existing parameter | |
932 | */ | |
933 | if (ep->cur_audiofmt != subs->cur_audiofmt || ep->opened > 1) | |
934 | return ep; | |
935 | } | |
5a6c3e11 TI |
936 | if (!fp->implicit_fb) |
937 | continue; | |
938 | /* for the implicit fb, check the sync ep as well */ | |
54cb3190 | 939 | ep = snd_usb_get_endpoint(chip, fp->sync_ep); |
d463ac1a TI |
940 | if (ep && ep->cur_audiofmt) { |
941 | /* ditto, if the sync (data) ep is used by others, | |
942 | * this stream is restricted by the sync ep | |
943 | */ | |
944 | if (ep != subs->sync_endpoint || ep->opened > 1) | |
945 | return ep; | |
946 | } | |
5a6c3e11 | 947 | } |
e4ea77f8 TI |
948 | return NULL; |
949 | } | |
950 | ||
951 | /* additional hw constraints for implicit feedback mode */ | |
952 | static int hw_rule_format_implicit_fb(struct snd_pcm_hw_params *params, | |
953 | struct snd_pcm_hw_rule *rule) | |
954 | { | |
955 | struct snd_usb_substream *subs = rule->private; | |
956 | const struct snd_usb_endpoint *ep; | |
957 | struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
5a6c3e11 | 958 | |
e4ea77f8 TI |
959 | ep = get_sync_ep_from_substream(subs); |
960 | if (!ep) | |
5a6c3e11 | 961 | return 0; |
5a6c3e11 | 962 | |
e4ea77f8 TI |
963 | hwc_debug("applying %s\n", __func__); |
964 | return apply_hw_params_format_bits(fmt, pcm_format_to_bits(ep->cur_format)); | |
965 | } | |
5a6c3e11 | 966 | |
e4ea77f8 TI |
967 | static int hw_rule_rate_implicit_fb(struct snd_pcm_hw_params *params, |
968 | struct snd_pcm_hw_rule *rule) | |
969 | { | |
970 | struct snd_usb_substream *subs = rule->private; | |
971 | const struct snd_usb_endpoint *ep; | |
972 | struct snd_interval *it; | |
bf6313a0 | 973 | |
e4ea77f8 TI |
974 | ep = get_sync_ep_from_substream(subs); |
975 | if (!ep) | |
976 | return 0; | |
5a6c3e11 | 977 | |
e4ea77f8 TI |
978 | hwc_debug("applying %s\n", __func__); |
979 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
980 | return apply_hw_params_minmax(it, ep->cur_rate, ep->cur_rate); | |
981 | } | |
982 | ||
983 | static int hw_rule_period_size_implicit_fb(struct snd_pcm_hw_params *params, | |
984 | struct snd_pcm_hw_rule *rule) | |
985 | { | |
986 | struct snd_usb_substream *subs = rule->private; | |
987 | const struct snd_usb_endpoint *ep; | |
988 | struct snd_interval *it; | |
5a6c3e11 | 989 | |
e4ea77f8 TI |
990 | ep = get_sync_ep_from_substream(subs); |
991 | if (!ep) | |
992 | return 0; | |
993 | ||
994 | hwc_debug("applying %s\n", __func__); | |
995 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); | |
996 | return apply_hw_params_minmax(it, ep->cur_period_frames, | |
997 | ep->cur_period_frames); | |
998 | } | |
999 | ||
1000 | static int hw_rule_periods_implicit_fb(struct snd_pcm_hw_params *params, | |
1001 | struct snd_pcm_hw_rule *rule) | |
1002 | { | |
1003 | struct snd_usb_substream *subs = rule->private; | |
1004 | const struct snd_usb_endpoint *ep; | |
1005 | struct snd_interval *it; | |
1006 | ||
1007 | ep = get_sync_ep_from_substream(subs); | |
1008 | if (!ep) | |
1009 | return 0; | |
1010 | ||
1011 | hwc_debug("applying %s\n", __func__); | |
1012 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIODS); | |
1013 | return apply_hw_params_minmax(it, ep->cur_buffer_periods, | |
1014 | ep->cur_buffer_periods); | |
5a6c3e11 | 1015 | } |
e5779998 DM |
1016 | |
1017 | /* | |
1018 | * set up the runtime hardware information. | |
1019 | */ | |
1020 | ||
1021 | static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) | |
1022 | { | |
cab941b7 | 1023 | const struct audioformat *fp; |
e5779998 | 1024 | unsigned int pt, ptmin; |
5a6c3e11 | 1025 | int param_period_time_if_needed = -1; |
e5779998 DM |
1026 | int err; |
1027 | ||
1028 | runtime->hw.formats = subs->formats; | |
1029 | ||
1030 | runtime->hw.rate_min = 0x7fffffff; | |
1031 | runtime->hw.rate_max = 0; | |
1032 | runtime->hw.channels_min = 256; | |
1033 | runtime->hw.channels_max = 0; | |
1034 | runtime->hw.rates = 0; | |
1035 | ptmin = UINT_MAX; | |
1036 | /* check min/max rates and channels */ | |
88766f04 | 1037 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
1038 | runtime->hw.rates |= fp->rates; |
1039 | if (runtime->hw.rate_min > fp->rate_min) | |
1040 | runtime->hw.rate_min = fp->rate_min; | |
1041 | if (runtime->hw.rate_max < fp->rate_max) | |
1042 | runtime->hw.rate_max = fp->rate_max; | |
1043 | if (runtime->hw.channels_min > fp->channels) | |
1044 | runtime->hw.channels_min = fp->channels; | |
1045 | if (runtime->hw.channels_max < fp->channels) | |
1046 | runtime->hw.channels_max = fp->channels; | |
1047 | if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { | |
1048 | /* FIXME: there might be more than one audio formats... */ | |
1049 | runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = | |
1050 | fp->frame_size; | |
1051 | } | |
1052 | pt = 125 * (1 << fp->datainterval); | |
1053 | ptmin = min(ptmin, pt); | |
1054 | } | |
1055 | ||
1056 | param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; | |
978520b7 | 1057 | if (subs->speed == USB_SPEED_FULL) |
e5779998 DM |
1058 | /* full speed devices have fixed data packet interval */ |
1059 | ptmin = 1000; | |
1060 | if (ptmin == 1000) | |
1061 | /* if period time doesn't go below 1 ms, no rules needed */ | |
1062 | param_period_time_if_needed = -1; | |
e92be814 TI |
1063 | |
1064 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1065 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1066 | ptmin, UINT_MAX); | |
1067 | if (err < 0) | |
1068 | return err; | |
1069 | ||
1070 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1071 | hw_rule_rate, subs, | |
506c203c | 1072 | SNDRV_PCM_HW_PARAM_RATE, |
e92be814 TI |
1073 | SNDRV_PCM_HW_PARAM_FORMAT, |
1074 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1075 | param_period_time_if_needed, | |
1076 | -1); | |
1077 | if (err < 0) | |
1078 | return err; | |
5a6c3e11 | 1079 | |
e92be814 TI |
1080 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
1081 | hw_rule_channels, subs, | |
506c203c | 1082 | SNDRV_PCM_HW_PARAM_CHANNELS, |
e92be814 TI |
1083 | SNDRV_PCM_HW_PARAM_FORMAT, |
1084 | SNDRV_PCM_HW_PARAM_RATE, | |
1085 | param_period_time_if_needed, | |
1086 | -1); | |
1087 | if (err < 0) | |
1088 | return err; | |
1089 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1090 | hw_rule_format, subs, | |
506c203c | 1091 | SNDRV_PCM_HW_PARAM_FORMAT, |
e92be814 TI |
1092 | SNDRV_PCM_HW_PARAM_RATE, |
1093 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1094 | param_period_time_if_needed, | |
1095 | -1); | |
1096 | if (err < 0) | |
1097 | return err; | |
e5779998 DM |
1098 | if (param_period_time_if_needed >= 0) { |
1099 | err = snd_pcm_hw_rule_add(runtime, 0, | |
1100 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1101 | hw_rule_period_time, subs, | |
1102 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1103 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1104 | SNDRV_PCM_HW_PARAM_RATE, | |
1105 | -1); | |
1106 | if (err < 0) | |
e92be814 | 1107 | return err; |
e5779998 | 1108 | } |
88a8516a | 1109 | |
24d0c9f0 TI |
1110 | /* set max period and buffer sizes for 1 and 2 seconds, respectively */ |
1111 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1112 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1113 | 0, 1000000); | |
1114 | if (err < 0) | |
1115 | return err; | |
1116 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1117 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
1118 | 0, 2000000); | |
1119 | if (err < 0) | |
1120 | return err; | |
1121 | ||
e4ea77f8 TI |
1122 | /* additional hw constraints for implicit fb */ |
1123 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1124 | hw_rule_format_implicit_fb, subs, | |
1125 | SNDRV_PCM_HW_PARAM_FORMAT, -1); | |
1126 | if (err < 0) | |
1127 | return err; | |
1128 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1129 | hw_rule_rate_implicit_fb, subs, | |
1130 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1131 | if (err < 0) | |
1132 | return err; | |
1133 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, | |
1134 | hw_rule_period_size_implicit_fb, subs, | |
1135 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1136 | if (err < 0) | |
1137 | return err; | |
1138 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
1139 | hw_rule_periods_implicit_fb, subs, | |
1140 | SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1141 | if (err < 0) | |
1142 | return err; | |
1143 | ||
59d7f5f6 TI |
1144 | list_for_each_entry(fp, &subs->fmt_list, list) { |
1145 | if (fp->implicit_fb) { | |
1146 | runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; | |
1147 | break; | |
1148 | } | |
1149 | } | |
1150 | ||
1865211d | 1151 | return 0; |
e5779998 DM |
1152 | } |
1153 | ||
6fddc797 | 1154 | static int snd_usb_pcm_open(struct snd_pcm_substream *substream) |
e5779998 | 1155 | { |
6fddc797 | 1156 | int direction = substream->stream; |
e5779998 DM |
1157 | struct snd_usb_stream *as = snd_pcm_substream_chip(substream); |
1158 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1159 | struct snd_usb_substream *subs = &as->substream[direction]; | |
66354f18 | 1160 | int ret; |
e5779998 | 1161 | |
e5779998 | 1162 | runtime->hw = snd_usb_hardware; |
d5f871f8 TI |
1163 | /* need an explicit sync to catch applptr update in low-latency mode */ |
1164 | if (direction == SNDRV_PCM_STREAM_PLAYBACK && | |
1165 | as->chip->lowlatency) | |
53451b6d | 1166 | runtime->hw.info |= SNDRV_PCM_INFO_SYNC_APPLPTR; |
e5779998 DM |
1167 | runtime->private_data = subs; |
1168 | subs->pcm_substream = substream; | |
88a8516a | 1169 | /* runtime PM is also done there */ |
d24f5061 DM |
1170 | |
1171 | /* initialize DSD/DOP context */ | |
1172 | subs->dsd_dop.byte_idx = 0; | |
1173 | subs->dsd_dop.channel = 0; | |
1174 | subs->dsd_dop.marker = 1; | |
1175 | ||
66354f18 | 1176 | ret = setup_hw_info(runtime, subs); |
1865211d TI |
1177 | if (ret < 0) |
1178 | return ret; | |
1179 | ret = snd_usb_autoresume(subs->stream->chip); | |
1180 | if (ret < 0) | |
1181 | return ret; | |
1182 | ret = snd_media_stream_init(subs, as->pcm, direction); | |
1183 | if (ret < 0) | |
1184 | snd_usb_autosuspend(subs->stream->chip); | |
66354f18 | 1185 | return ret; |
e5779998 DM |
1186 | } |
1187 | ||
6fddc797 | 1188 | static int snd_usb_pcm_close(struct snd_pcm_substream *substream) |
e5779998 | 1189 | { |
6fddc797 | 1190 | int direction = substream->stream; |
e5779998 DM |
1191 | struct snd_usb_stream *as = snd_pcm_substream_chip(substream); |
1192 | struct snd_usb_substream *subs = &as->substream[direction]; | |
a0a4959e | 1193 | int ret; |
e5779998 | 1194 | |
66354f18 | 1195 | snd_media_stop_pipeline(subs); |
68e67f40 | 1196 | |
bf6313a0 | 1197 | if (!snd_usb_lock_shutdown(subs->stream->chip)) { |
a0a4959e | 1198 | ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1); |
47ab1545 | 1199 | snd_usb_unlock_shutdown(subs->stream->chip); |
a0a4959e JS |
1200 | if (ret < 0) |
1201 | return ret; | |
68e67f40 DM |
1202 | } |
1203 | ||
e5779998 | 1204 | subs->pcm_substream = NULL; |
88a8516a | 1205 | snd_usb_autosuspend(subs->stream->chip); |
edcd3633 | 1206 | |
68e67f40 | 1207 | return 0; |
edcd3633 DM |
1208 | } |
1209 | ||
1210 | /* Since a URB can handle only a single linear buffer, we must use double | |
1211 | * buffering when the data to be transferred overflows the buffer boundary. | |
1212 | * To avoid inconsistencies when updating hwptr_done, we use double buffering | |
1213 | * for all URBs. | |
1214 | */ | |
1215 | static void retire_capture_urb(struct snd_usb_substream *subs, | |
1216 | struct urb *urb) | |
1217 | { | |
1218 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1219 | unsigned int stride, frames, bytes, oldptr; | |
1220 | int i, period_elapsed = 0; | |
1221 | unsigned long flags; | |
1222 | unsigned char *cp; | |
e4cc6153 PLB |
1223 | int current_frame_number; |
1224 | ||
1225 | /* read frame number here, update pointer in critical section */ | |
1226 | current_frame_number = usb_get_current_frame_number(subs->dev); | |
edcd3633 DM |
1227 | |
1228 | stride = runtime->frame_bits >> 3; | |
1229 | ||
1230 | for (i = 0; i < urb->number_of_packets; i++) { | |
1539d4f8 | 1231 | cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj; |
edcd3633 | 1232 | if (urb->iso_frame_desc[i].status && printk_ratelimit()) { |
0ba41d91 TI |
1233 | dev_dbg(&subs->dev->dev, "frame %d active: %d\n", |
1234 | i, urb->iso_frame_desc[i].status); | |
edcd3633 DM |
1235 | // continue; |
1236 | } | |
1237 | bytes = urb->iso_frame_desc[i].actual_length; | |
1b7ecc24 HM |
1238 | if (subs->stream_offset_adj > 0) { |
1239 | unsigned int adj = min(subs->stream_offset_adj, bytes); | |
1240 | cp += adj; | |
1241 | bytes -= adj; | |
1242 | subs->stream_offset_adj -= adj; | |
1243 | } | |
edcd3633 DM |
1244 | frames = bytes / stride; |
1245 | if (!subs->txfr_quirk) | |
1246 | bytes = frames * stride; | |
1247 | if (bytes % (runtime->sample_bits >> 3) != 0) { | |
edcd3633 | 1248 | int oldbytes = bytes; |
edcd3633 | 1249 | bytes = frames * stride; |
377a879d | 1250 | dev_warn_ratelimited(&subs->dev->dev, |
0ba41d91 | 1251 | "Corrected urb data len. %d->%d\n", |
edcd3633 DM |
1252 | oldbytes, bytes); |
1253 | } | |
1254 | /* update the current pointer */ | |
1255 | spin_lock_irqsave(&subs->lock, flags); | |
1256 | oldptr = subs->hwptr_done; | |
1257 | subs->hwptr_done += bytes; | |
d303c5d3 TI |
1258 | if (subs->hwptr_done >= subs->buffer_bytes) |
1259 | subs->hwptr_done -= subs->buffer_bytes; | |
edcd3633 DM |
1260 | frames = (bytes + (oldptr % stride)) / stride; |
1261 | subs->transfer_done += frames; | |
1262 | if (subs->transfer_done >= runtime->period_size) { | |
1263 | subs->transfer_done -= runtime->period_size; | |
1264 | period_elapsed = 1; | |
1265 | } | |
e4cc6153 PLB |
1266 | |
1267 | /* realign last_frame_number */ | |
1268 | subs->last_frame_number = current_frame_number; | |
e4cc6153 | 1269 | |
edcd3633 DM |
1270 | spin_unlock_irqrestore(&subs->lock, flags); |
1271 | /* copy a data chunk */ | |
d303c5d3 TI |
1272 | if (oldptr + bytes > subs->buffer_bytes) { |
1273 | unsigned int bytes1 = subs->buffer_bytes - oldptr; | |
1274 | ||
edcd3633 DM |
1275 | memcpy(runtime->dma_area + oldptr, cp, bytes1); |
1276 | memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); | |
1277 | } else { | |
1278 | memcpy(runtime->dma_area + oldptr, cp, bytes); | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | if (period_elapsed) | |
1283 | snd_pcm_period_elapsed(subs->pcm_substream); | |
1284 | } | |
1285 | ||
e8a8f09c TI |
1286 | static void urb_ctx_queue_advance(struct snd_usb_substream *subs, |
1287 | struct urb *urb, unsigned int bytes) | |
1288 | { | |
1289 | struct snd_urb_ctx *ctx = urb->context; | |
1290 | ||
1291 | ctx->queued += bytes; | |
1292 | subs->inflight_bytes += bytes; | |
1293 | subs->hwptr_done += bytes; | |
1294 | if (subs->hwptr_done >= subs->buffer_bytes) | |
1295 | subs->hwptr_done -= subs->buffer_bytes; | |
1296 | } | |
1297 | ||
d24f5061 DM |
1298 | static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs, |
1299 | struct urb *urb, unsigned int bytes) | |
1300 | { | |
1301 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
d24f5061 DM |
1302 | unsigned int dst_idx = 0; |
1303 | unsigned int src_idx = subs->hwptr_done; | |
d303c5d3 | 1304 | unsigned int wrap = subs->buffer_bytes; |
d24f5061 DM |
1305 | u8 *dst = urb->transfer_buffer; |
1306 | u8 *src = runtime->dma_area; | |
6b2394ba | 1307 | static const u8 marker[] = { 0x05, 0xfa }; |
e8a8f09c | 1308 | unsigned int queued = 0; |
d24f5061 DM |
1309 | |
1310 | /* | |
1311 | * The DSP DOP format defines a way to transport DSD samples over | |
1312 | * normal PCM data endpoints. It requires stuffing of marker bytes | |
1313 | * (0x05 and 0xfa, alternating per sample frame), and then expects | |
1314 | * 2 additional bytes of actual payload. The whole frame is stored | |
1315 | * LSB. | |
1316 | * | |
1317 | * Hence, for a stereo transport, the buffer layout looks like this, | |
1318 | * where L refers to left channel samples and R to right. | |
1319 | * | |
1320 | * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa | |
1321 | * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa | |
1322 | * ..... | |
1323 | * | |
1324 | */ | |
1325 | ||
1326 | while (bytes--) { | |
1327 | if (++subs->dsd_dop.byte_idx == 3) { | |
1328 | /* frame boundary? */ | |
1329 | dst[dst_idx++] = marker[subs->dsd_dop.marker]; | |
1330 | src_idx += 2; | |
1331 | subs->dsd_dop.byte_idx = 0; | |
1332 | ||
1333 | if (++subs->dsd_dop.channel % runtime->channels == 0) { | |
1334 | /* alternate the marker */ | |
1335 | subs->dsd_dop.marker++; | |
1336 | subs->dsd_dop.marker %= ARRAY_SIZE(marker); | |
1337 | subs->dsd_dop.channel = 0; | |
1338 | } | |
1339 | } else { | |
1340 | /* stuff the DSD payload */ | |
1341 | int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap; | |
44dcbbb1 DM |
1342 | |
1343 | if (subs->cur_audiofmt->dsd_bitrev) | |
1344 | dst[dst_idx++] = bitrev8(src[idx]); | |
1345 | else | |
1346 | dst[dst_idx++] = src[idx]; | |
e8a8f09c | 1347 | queued++; |
d24f5061 DM |
1348 | } |
1349 | } | |
e8a8f09c TI |
1350 | |
1351 | urb_ctx_queue_advance(subs, urb, queued); | |
d24f5061 DM |
1352 | } |
1353 | ||
4f083917 TI |
1354 | /* copy bit-reversed bytes onto transfer buffer */ |
1355 | static void fill_playback_urb_dsd_bitrev(struct snd_usb_substream *subs, | |
1356 | struct urb *urb, unsigned int bytes) | |
1357 | { | |
1358 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1359 | const u8 *src = runtime->dma_area; | |
1360 | u8 *buf = urb->transfer_buffer; | |
1361 | int i, ofs = subs->hwptr_done; | |
1362 | ||
1363 | for (i = 0; i < bytes; i++) { | |
1364 | *buf++ = bitrev8(src[ofs]); | |
1365 | if (++ofs >= subs->buffer_bytes) | |
1366 | ofs = 0; | |
1367 | } | |
1368 | ||
1369 | urb_ctx_queue_advance(subs, urb, bytes); | |
1370 | } | |
1371 | ||
b97a9369 RW |
1372 | static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb, |
1373 | int offset, int stride, unsigned int bytes) | |
07a40c2f RW |
1374 | { |
1375 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1376 | ||
d303c5d3 | 1377 | if (subs->hwptr_done + bytes > subs->buffer_bytes) { |
07a40c2f | 1378 | /* err, the transferred area goes over buffer boundary. */ |
d303c5d3 TI |
1379 | unsigned int bytes1 = subs->buffer_bytes - subs->hwptr_done; |
1380 | ||
b97a9369 | 1381 | memcpy(urb->transfer_buffer + offset, |
07a40c2f | 1382 | runtime->dma_area + subs->hwptr_done, bytes1); |
b97a9369 | 1383 | memcpy(urb->transfer_buffer + offset + bytes1, |
07a40c2f RW |
1384 | runtime->dma_area, bytes - bytes1); |
1385 | } else { | |
b97a9369 | 1386 | memcpy(urb->transfer_buffer + offset, |
07a40c2f RW |
1387 | runtime->dma_area + subs->hwptr_done, bytes); |
1388 | } | |
e8a8f09c TI |
1389 | |
1390 | urb_ctx_queue_advance(subs, urb, bytes); | |
07a40c2f RW |
1391 | } |
1392 | ||
e0570446 RW |
1393 | static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs, |
1394 | struct urb *urb, int stride, | |
1395 | unsigned int bytes) | |
1396 | { | |
1397 | __le32 packet_length; | |
1398 | int i; | |
1399 | ||
1400 | /* Put __le32 length descriptor at start of each packet. */ | |
1401 | for (i = 0; i < urb->number_of_packets; i++) { | |
1402 | unsigned int length = urb->iso_frame_desc[i].length; | |
1403 | unsigned int offset = urb->iso_frame_desc[i].offset; | |
1404 | ||
1405 | packet_length = cpu_to_le32(length); | |
1406 | offset += i * sizeof(packet_length); | |
1407 | urb->iso_frame_desc[i].offset = offset; | |
1408 | urb->iso_frame_desc[i].length += sizeof(packet_length); | |
1409 | memcpy(urb->transfer_buffer + offset, | |
1410 | &packet_length, sizeof(packet_length)); | |
1411 | copy_to_urb(subs, urb, offset + sizeof(packet_length), | |
1412 | stride, length); | |
1413 | } | |
1414 | /* Adjust transfer size accordingly. */ | |
1415 | bytes += urb->number_of_packets * sizeof(packet_length); | |
1416 | return bytes; | |
1417 | } | |
1418 | ||
d5f871f8 TI |
1419 | static int prepare_playback_urb(struct snd_usb_substream *subs, |
1420 | struct urb *urb, | |
1421 | bool in_stream_lock) | |
edcd3633 DM |
1422 | { |
1423 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
245baf98 | 1424 | struct snd_usb_endpoint *ep = subs->data_endpoint; |
edcd3633 | 1425 | struct snd_urb_ctx *ctx = urb->context; |
d5f871f8 TI |
1426 | unsigned int frames, bytes; |
1427 | int counts; | |
1428 | unsigned int transfer_done, frame_limit, avail = 0; | |
edcd3633 DM |
1429 | int i, stride, period_elapsed = 0; |
1430 | unsigned long flags; | |
d5f871f8 | 1431 | int err = 0; |
edcd3633 | 1432 | |
d303c5d3 | 1433 | stride = ep->stride; |
edcd3633 DM |
1434 | |
1435 | frames = 0; | |
e8a8f09c | 1436 | ctx->queued = 0; |
edcd3633 | 1437 | urb->number_of_packets = 0; |
d5f871f8 | 1438 | |
edcd3633 | 1439 | spin_lock_irqsave(&subs->lock, flags); |
d5f871f8 TI |
1440 | frame_limit = subs->frame_limit + ep->max_urb_frames; |
1441 | transfer_done = subs->transfer_done; | |
1442 | ||
1443 | if (subs->lowlatency_playback && | |
d8b4efee | 1444 | runtime->state != SNDRV_PCM_STATE_DRAINING) { |
d5f871f8 TI |
1445 | unsigned int hwptr = subs->hwptr_done / stride; |
1446 | ||
1447 | /* calculate the byte offset-in-buffer of the appl_ptr */ | |
1448 | avail = (runtime->control->appl_ptr - runtime->hw_ptr_base) | |
1449 | % runtime->buffer_size; | |
1450 | if (avail <= hwptr) | |
1451 | avail += runtime->buffer_size; | |
1452 | avail -= hwptr; | |
1453 | } | |
1454 | ||
edcd3633 | 1455 | for (i = 0; i < ctx->packets; i++) { |
d5f871f8 TI |
1456 | counts = snd_usb_endpoint_next_packet_size(ep, ctx, i, avail); |
1457 | if (counts < 0) | |
1458 | break; | |
edcd3633 | 1459 | /* set up descriptor */ |
d303c5d3 TI |
1460 | urb->iso_frame_desc[i].offset = frames * stride; |
1461 | urb->iso_frame_desc[i].length = counts * stride; | |
edcd3633 | 1462 | frames += counts; |
d5f871f8 | 1463 | avail -= counts; |
edcd3633 | 1464 | urb->number_of_packets++; |
d5f871f8 TI |
1465 | transfer_done += counts; |
1466 | if (transfer_done >= runtime->period_size) { | |
1467 | transfer_done -= runtime->period_size; | |
1468 | frame_limit = 0; | |
edcd3633 DM |
1469 | period_elapsed = 1; |
1470 | if (subs->fmt_type == UAC_FORMAT_TYPE_II) { | |
d5f871f8 | 1471 | if (transfer_done > 0) { |
edcd3633 DM |
1472 | /* FIXME: fill-max mode is not |
1473 | * supported yet */ | |
d5f871f8 TI |
1474 | frames -= transfer_done; |
1475 | counts -= transfer_done; | |
edcd3633 | 1476 | urb->iso_frame_desc[i].length = |
d303c5d3 | 1477 | counts * stride; |
d5f871f8 | 1478 | transfer_done = 0; |
edcd3633 DM |
1479 | } |
1480 | i++; | |
1481 | if (i < ctx->packets) { | |
1482 | /* add a transfer delimiter */ | |
1483 | urb->iso_frame_desc[i].offset = | |
d303c5d3 | 1484 | frames * stride; |
edcd3633 DM |
1485 | urb->iso_frame_desc[i].length = 0; |
1486 | urb->number_of_packets++; | |
1487 | } | |
1488 | break; | |
1489 | } | |
1490 | } | |
976b6c06 | 1491 | /* finish at the period boundary or after enough frames */ |
d5f871f8 | 1492 | if ((period_elapsed || transfer_done >= frame_limit) && |
976b6c06 | 1493 | !snd_usb_endpoint_implicit_feedback_sink(ep)) |
edcd3633 DM |
1494 | break; |
1495 | } | |
d24f5061 | 1496 | |
d5f871f8 TI |
1497 | if (!frames) { |
1498 | err = -EAGAIN; | |
1499 | goto unlock; | |
1500 | } | |
1501 | ||
1502 | bytes = frames * stride; | |
1503 | subs->transfer_done = transfer_done; | |
1504 | subs->frame_limit = frame_limit; | |
6aa719d1 | 1505 | if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U16_LE && |
d24f5061 DM |
1506 | subs->cur_audiofmt->dsd_dop)) { |
1507 | fill_playback_urb_dsd_dop(subs, urb, bytes); | |
6aa719d1 | 1508 | } else if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U8 && |
44dcbbb1 | 1509 | subs->cur_audiofmt->dsd_bitrev)) { |
4f083917 | 1510 | fill_playback_urb_dsd_bitrev(subs, urb, bytes); |
edcd3633 | 1511 | } else { |
d24f5061 | 1512 | /* usual PCM */ |
e0570446 RW |
1513 | if (!subs->tx_length_quirk) |
1514 | copy_to_urb(subs, urb, 0, stride, bytes); | |
1515 | else | |
1516 | bytes = copy_to_urb_quirk(subs, urb, stride, bytes); | |
1517 | /* bytes is now amount of outgoing data */ | |
edcd3633 | 1518 | } |
d24f5061 | 1519 | |
fbcfbf5f | 1520 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
fbcfbf5f | 1521 | |
ea33d359 PLB |
1522 | if (subs->trigger_tstamp_pending_update) { |
1523 | /* this is the first actual URB submitted, | |
1524 | * update trigger timestamp to reflect actual start time | |
1525 | */ | |
1526 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1527 | subs->trigger_tstamp_pending_update = false; | |
1528 | } | |
1529 | ||
9c9a3b9d | 1530 | if (period_elapsed && !subs->running && subs->lowlatency_playback) { |
307cc9ba TI |
1531 | subs->period_elapsed_pending = 1; |
1532 | period_elapsed = 0; | |
1533 | } | |
d5f871f8 TI |
1534 | |
1535 | unlock: | |
edcd3633 | 1536 | spin_unlock_irqrestore(&subs->lock, flags); |
d5f871f8 TI |
1537 | if (err < 0) |
1538 | return err; | |
edcd3633 | 1539 | urb->transfer_buffer_length = bytes; |
d5f871f8 TI |
1540 | if (period_elapsed) { |
1541 | if (in_stream_lock) | |
1542 | snd_pcm_period_elapsed_under_stream_lock(subs->pcm_substream); | |
1543 | else | |
1544 | snd_pcm_period_elapsed(subs->pcm_substream); | |
1545 | } | |
1546 | return 0; | |
edcd3633 DM |
1547 | } |
1548 | ||
1549 | /* | |
1550 | * process after playback data complete | |
1551 | * - decrease the delay count again | |
1552 | */ | |
1553 | static void retire_playback_urb(struct snd_usb_substream *subs, | |
1554 | struct urb *urb) | |
1555 | { | |
1556 | unsigned long flags; | |
e8a8f09c | 1557 | struct snd_urb_ctx *ctx = urb->context; |
307cc9ba | 1558 | bool period_elapsed = false; |
1213a205 | 1559 | |
edcd3633 | 1560 | spin_lock_irqsave(&subs->lock, flags); |
e8a8f09c TI |
1561 | if (ctx->queued) { |
1562 | if (subs->inflight_bytes >= ctx->queued) | |
1563 | subs->inflight_bytes -= ctx->queued; | |
1564 | else | |
1565 | subs->inflight_bytes = 0; | |
48779a0b TI |
1566 | } |
1567 | ||
e8a8f09c | 1568 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
307cc9ba TI |
1569 | if (subs->running) { |
1570 | period_elapsed = subs->period_elapsed_pending; | |
1571 | subs->period_elapsed_pending = 0; | |
1572 | } | |
edcd3633 | 1573 | spin_unlock_irqrestore(&subs->lock, flags); |
307cc9ba TI |
1574 | if (period_elapsed) |
1575 | snd_pcm_period_elapsed(subs->pcm_substream); | |
e5779998 DM |
1576 | } |
1577 | ||
d5f871f8 TI |
1578 | /* PCM ack callback for the playback stream; |
1579 | * this plays a role only when the stream is running in low-latency mode. | |
1580 | */ | |
1581 | static int snd_usb_pcm_playback_ack(struct snd_pcm_substream *substream) | |
1582 | { | |
1583 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
1584 | struct snd_usb_endpoint *ep; | |
1585 | ||
1586 | if (!subs->lowlatency_playback || !subs->running) | |
1587 | return 0; | |
1588 | ep = subs->data_endpoint; | |
1589 | if (!ep) | |
1590 | return 0; | |
1591 | /* When no more in-flight URBs available, try to process the pending | |
1592 | * outputs here | |
1593 | */ | |
1594 | if (!ep->active_mask) | |
1595 | snd_usb_queue_pending_output_urbs(ep, true); | |
1596 | return 0; | |
1597 | } | |
1598 | ||
edcd3633 DM |
1599 | static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, |
1600 | int cmd) | |
1601 | { | |
1602 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
307cc9ba | 1603 | int err; |
edcd3633 DM |
1604 | |
1605 | switch (cmd) { | |
1606 | case SNDRV_PCM_TRIGGER_START: | |
ea33d359 | 1607 | subs->trigger_tstamp_pending_update = true; |
c0dbbdad | 1608 | fallthrough; |
edcd3633 | 1609 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
96e221f3 TI |
1610 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1611 | prepare_playback_urb, | |
1612 | retire_playback_urb, | |
1613 | subs); | |
9c9a3b9d | 1614 | if (subs->lowlatency_playback && |
4267c5a8 | 1615 | cmd == SNDRV_PCM_TRIGGER_START) { |
eee5d6f1 TI |
1616 | if (in_free_wheeling_mode(substream->runtime)) |
1617 | subs->lowlatency_playback = false; | |
307cc9ba TI |
1618 | err = start_endpoints(subs); |
1619 | if (err < 0) { | |
1620 | snd_usb_endpoint_set_callback(subs->data_endpoint, | |
1621 | NULL, NULL, NULL); | |
1622 | return err; | |
1623 | } | |
1624 | } | |
97f8d3b6 | 1625 | subs->running = 1; |
bf6313a0 TI |
1626 | dev_dbg(&subs->dev->dev, "%d:%d Start Playback PCM\n", |
1627 | subs->cur_audiofmt->iface, | |
1628 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1629 | return 0; |
75c16b51 | 1630 | case SNDRV_PCM_TRIGGER_SUSPEND: |
edcd3633 | 1631 | case SNDRV_PCM_TRIGGER_STOP: |
d8b4efee | 1632 | stop_endpoints(subs, substream->runtime->state == SNDRV_PCM_STATE_DRAINING); |
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 Playback PCM\n", |
1637 | subs->cur_audiofmt->iface, | |
1638 | subs->cur_audiofmt->altsetting); | |
edcd3633 DM |
1639 | return 0; |
1640 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
48779a0b | 1641 | /* keep retire_data_urb for delay calculation */ |
96e221f3 TI |
1642 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1643 | NULL, | |
1644 | retire_playback_urb, | |
1645 | subs); | |
97f8d3b6 | 1646 | subs->running = 0; |
bf6313a0 TI |
1647 | dev_dbg(&subs->dev->dev, "%d:%d Pause Playback PCM\n", |
1648 | subs->cur_audiofmt->iface, | |
1649 | subs->cur_audiofmt->altsetting); | |
edcd3633 DM |
1650 | return 0; |
1651 | } | |
1652 | ||
1653 | return -EINVAL; | |
1654 | } | |
1655 | ||
afe25967 DM |
1656 | static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, |
1657 | int cmd) | |
edcd3633 DM |
1658 | { |
1659 | int err; | |
1660 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
1661 | ||
1662 | switch (cmd) { | |
1663 | case SNDRV_PCM_TRIGGER_START: | |
1d0f9530 | 1664 | err = start_endpoints(subs); |
edcd3633 DM |
1665 | if (err < 0) |
1666 | return err; | |
96e221f3 TI |
1667 | fallthrough; |
1668 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
1669 | snd_usb_endpoint_set_callback(subs->data_endpoint, | |
1670 | NULL, retire_capture_urb, | |
1671 | subs); | |
e8a8f09c | 1672 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
97f8d3b6 | 1673 | subs->running = 1; |
bf6313a0 TI |
1674 | dev_dbg(&subs->dev->dev, "%d:%d Start Capture PCM\n", |
1675 | subs->cur_audiofmt->iface, | |
1676 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1677 | return 0; |
75c16b51 | 1678 | case SNDRV_PCM_TRIGGER_SUSPEND: |
edcd3633 | 1679 | case SNDRV_PCM_TRIGGER_STOP: |
813a17ca | 1680 | stop_endpoints(subs, false); |
96e221f3 | 1681 | fallthrough; |
edcd3633 | 1682 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
96e221f3 TI |
1683 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1684 | NULL, NULL, NULL); | |
97f8d3b6 | 1685 | subs->running = 0; |
bf6313a0 TI |
1686 | dev_dbg(&subs->dev->dev, "%d:%d Stop Capture PCM\n", |
1687 | subs->cur_audiofmt->iface, | |
1688 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1689 | return 0; |
edcd3633 DM |
1690 | } |
1691 | ||
1692 | return -EINVAL; | |
1693 | } | |
1694 | ||
31cb1fb4 | 1695 | static const struct snd_pcm_ops snd_usb_playback_ops = { |
6fddc797 TI |
1696 | .open = snd_usb_pcm_open, |
1697 | .close = snd_usb_pcm_close, | |
e5779998 DM |
1698 | .hw_params = snd_usb_hw_params, |
1699 | .hw_free = snd_usb_hw_free, | |
1700 | .prepare = snd_usb_pcm_prepare, | |
1701 | .trigger = snd_usb_substream_playback_trigger, | |
dc5eafe7 | 1702 | .sync_stop = snd_usb_pcm_sync_stop, |
e5779998 | 1703 | .pointer = snd_usb_pcm_pointer, |
d5f871f8 | 1704 | .ack = snd_usb_pcm_playback_ack, |
e5779998 DM |
1705 | }; |
1706 | ||
31cb1fb4 | 1707 | static const struct snd_pcm_ops snd_usb_capture_ops = { |
6fddc797 TI |
1708 | .open = snd_usb_pcm_open, |
1709 | .close = snd_usb_pcm_close, | |
e5779998 DM |
1710 | .hw_params = snd_usb_hw_params, |
1711 | .hw_free = snd_usb_hw_free, | |
1712 | .prepare = snd_usb_pcm_prepare, | |
1713 | .trigger = snd_usb_substream_capture_trigger, | |
dc5eafe7 | 1714 | .sync_stop = snd_usb_pcm_sync_stop, |
e5779998 | 1715 | .pointer = snd_usb_pcm_pointer, |
f274baa4 TI |
1716 | }; |
1717 | ||
e5779998 DM |
1718 | void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) |
1719 | { | |
f274baa4 TI |
1720 | const struct snd_pcm_ops *ops; |
1721 | ||
b315997d | 1722 | ops = stream == SNDRV_PCM_STREAM_PLAYBACK ? |
f274baa4 | 1723 | &snd_usb_playback_ops : &snd_usb_capture_ops; |
f274baa4 TI |
1724 | snd_pcm_set_ops(pcm, stream, ops); |
1725 | } | |
1726 | ||
1727 | void snd_usb_preallocate_buffer(struct snd_usb_substream *subs) | |
1728 | { | |
1729 | struct snd_pcm *pcm = subs->stream->pcm; | |
1730 | struct snd_pcm_substream *s = pcm->streams[subs->direction].substream; | |
fb3c293b | 1731 | struct device *dev = subs->dev->bus->sysdev; |
f274baa4 | 1732 | |
b315997d | 1733 | if (snd_usb_use_vmalloc) |
6dd9486c TI |
1734 | snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_VMALLOC, |
1735 | NULL, 0, 0); | |
b315997d | 1736 | else |
6dd9486c TI |
1737 | snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_DEV_SG, |
1738 | dev, 64*1024, 512*1024); | |
e5779998 | 1739 | } |