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; | |
92a9c0ad | 163 | struct snd_usb_audio *chip; |
fd28941c JK |
164 | int rate = -1; |
165 | ||
291e9da9 JK |
166 | if (!subs) |
167 | return false; | |
92a9c0ad | 168 | chip = subs->stream->chip; |
fd28941c JK |
169 | if (!(chip->quirk_flags & QUIRK_FLAG_FIXED_RATE)) |
170 | return false; | |
171 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
172 | if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) | |
173 | return false; | |
174 | if (fp->nr_rates < 1) | |
175 | continue; | |
176 | if (fp->nr_rates > 1) | |
177 | return false; | |
178 | if (rate < 0) { | |
179 | rate = fp->rate_table[0]; | |
180 | continue; | |
181 | } | |
182 | if (rate != fp->rate_table[0]) | |
183 | return false; | |
184 | } | |
185 | return true; | |
186 | } | |
187 | ||
bf6313a0 | 188 | static int init_pitch_v1(struct snd_usb_audio *chip, int ep) |
767d75ad DM |
189 | { |
190 | struct usb_device *dev = chip->dev; | |
767d75ad DM |
191 | unsigned char data[1]; |
192 | int err; | |
193 | ||
767d75ad | 194 | data[0] = 1; |
f25ecf8f TI |
195 | err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, |
196 | USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, | |
197 | UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, | |
198 | data, sizeof(data)); | |
bf6313a0 | 199 | return err; |
767d75ad | 200 | } |
e5779998 | 201 | |
bf6313a0 | 202 | static int init_pitch_v2(struct snd_usb_audio *chip, int ep) |
92c25611 DM |
203 | { |
204 | struct usb_device *dev = chip->dev; | |
205 | unsigned char data[1]; | |
92c25611 DM |
206 | int err; |
207 | ||
92c25611 | 208 | data[0] = 1; |
f25ecf8f TI |
209 | err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, |
210 | USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, | |
211 | UAC2_EP_CS_PITCH << 8, 0, | |
212 | data, sizeof(data)); | |
bf6313a0 | 213 | return err; |
92c25611 DM |
214 | } |
215 | ||
e5779998 | 216 | /* |
92c25611 | 217 | * initialize the pitch control and sample rate |
e5779998 | 218 | */ |
73037c8d | 219 | int snd_usb_init_pitch(struct snd_usb_audio *chip, |
cab941b7 | 220 | const struct audioformat *fmt) |
e5779998 | 221 | { |
bf6313a0 TI |
222 | int err; |
223 | ||
92c25611 DM |
224 | /* if endpoint doesn't have pitch control, bail out */ |
225 | if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) | |
226 | return 0; | |
227 | ||
bf6313a0 TI |
228 | usb_audio_dbg(chip, "enable PITCH for EP 0x%x\n", fmt->endpoint); |
229 | ||
8f898e92 | 230 | switch (fmt->protocol) { |
767d75ad | 231 | case UAC_VERSION_1: |
bf6313a0 TI |
232 | err = init_pitch_v1(chip, fmt->endpoint); |
233 | break; | |
234 | case UAC_VERSION_2: | |
235 | err = init_pitch_v2(chip, fmt->endpoint); | |
236 | break; | |
a2acad82 | 237 | default: |
bf6313a0 TI |
238 | return 0; |
239 | } | |
767d75ad | 240 | |
bf6313a0 TI |
241 | if (err < 0) { |
242 | usb_audio_err(chip, "failed to enable PITCH for EP 0x%x\n", | |
243 | fmt->endpoint); | |
244 | return err; | |
767d75ad | 245 | } |
bf6313a0 TI |
246 | |
247 | return 0; | |
767d75ad DM |
248 | } |
249 | ||
813a17ca | 250 | static bool stop_endpoints(struct snd_usb_substream *subs, bool keep_pending) |
57234bc1 | 251 | { |
bf6313a0 TI |
252 | bool stopped = 0; |
253 | ||
57234bc1 | 254 | if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { |
813a17ca | 255 | snd_usb_endpoint_stop(subs->sync_endpoint, keep_pending); |
bf6313a0 | 256 | stopped = true; |
57234bc1 | 257 | } |
bf6313a0 | 258 | if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { |
813a17ca | 259 | snd_usb_endpoint_stop(subs->data_endpoint, keep_pending); |
bf6313a0 TI |
260 | stopped = true; |
261 | } | |
262 | return stopped; | |
57234bc1 TI |
263 | } |
264 | ||
1d0f9530 | 265 | static int start_endpoints(struct snd_usb_substream *subs) |
edcd3633 DM |
266 | { |
267 | int err; | |
268 | ||
269 | if (!subs->data_endpoint) | |
270 | return -EINVAL; | |
271 | ||
272 | if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { | |
bf6313a0 | 273 | err = snd_usb_endpoint_start(subs->data_endpoint); |
edcd3633 DM |
274 | if (err < 0) { |
275 | clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags); | |
57234bc1 | 276 | goto error; |
edcd3633 DM |
277 | } |
278 | } | |
279 | ||
280 | if (subs->sync_endpoint && | |
281 | !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { | |
bf6313a0 | 282 | err = snd_usb_endpoint_start(subs->sync_endpoint); |
edcd3633 DM |
283 | if (err < 0) { |
284 | clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); | |
57234bc1 | 285 | goto error; |
edcd3633 DM |
286 | } |
287 | } | |
288 | ||
289 | return 0; | |
57234bc1 TI |
290 | |
291 | error: | |
813a17ca | 292 | stop_endpoints(subs, false); |
57234bc1 | 293 | return err; |
edcd3633 DM |
294 | } |
295 | ||
dc5eafe7 TI |
296 | static void sync_pending_stops(struct snd_usb_substream *subs) |
297 | { | |
298 | snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint); | |
299 | snd_usb_endpoint_sync_pending_stop(subs->data_endpoint); | |
300 | } | |
301 | ||
dc5eafe7 TI |
302 | /* PCM sync_stop callback */ |
303 | static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream) | |
304 | { | |
305 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
306 | ||
257d2d7e | 307 | sync_pending_stops(subs); |
dc5eafe7 | 308 | return 0; |
edcd3633 DM |
309 | } |
310 | ||
9fddc15e | 311 | /* Set up sync endpoint */ |
f6581c0e TI |
312 | int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip, |
313 | struct audioformat *fmt) | |
a60945fd | 314 | { |
f6581c0e | 315 | struct usb_device *dev = chip->dev; |
f6581c0e TI |
316 | struct usb_host_interface *alts; |
317 | struct usb_interface_descriptor *altsd; | |
318 | unsigned int ep, attr, sync_attr; | |
319 | bool is_playback; | |
a60945fd EZ |
320 | int err; |
321 | ||
e0469d65 TI |
322 | if (fmt->sync_ep) |
323 | return 0; /* already set up */ | |
324 | ||
e42a09bc | 325 | alts = snd_usb_get_host_interface(chip, fmt->iface, fmt->altsetting); |
f6581c0e | 326 | if (!alts) |
2bc16b9f | 327 | return 0; |
f6581c0e TI |
328 | altsd = get_iface_desc(alts); |
329 | ||
9fddc15e TI |
330 | err = snd_usb_parse_implicit_fb_quirk(chip, fmt, alts); |
331 | if (err > 0) | |
332 | return 0; /* matched */ | |
333 | ||
334 | /* | |
335 | * Generic sync EP handling | |
336 | */ | |
2bc16b9f | 337 | |
efb75df1 | 338 | if (fmt->ep_idx > 0 || altsd->bNumEndpoints < 2) |
f34d0650 | 339 | return 0; |
c75a8a7a | 340 | |
9fddc15e | 341 | is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN); |
f6581c0e | 342 | attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; |
395ae54b PLB |
343 | if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC || |
344 | attr == USB_ENDPOINT_SYNC_ADAPTIVE)) || | |
f34d0650 EZ |
345 | (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE)) |
346 | return 0; | |
edcd3633 | 347 | |
f6581c0e TI |
348 | sync_attr = get_endpoint(alts, 1)->bmAttributes; |
349 | ||
395ae54b PLB |
350 | /* |
351 | * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see | |
352 | * if we don't find a sync endpoint, as on M-Audio Transit. In case of | |
353 | * error fall back to SYNC mode and don't create sync endpoint | |
354 | */ | |
355 | ||
f34d0650 EZ |
356 | /* check sync-pipe endpoint */ |
357 | /* ... and check descriptor size before accessing bSynchAddress | |
358 | because there is a version of the SB Audigy 2 NX firmware lacking | |
359 | the audio fields in the endpoint descriptors */ | |
f6581c0e | 360 | if ((sync_attr & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC || |
f34d0650 | 361 | (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
95fec883 | 362 | get_endpoint(alts, 1)->bSynchAddress != 0)) { |
0ba41d91 TI |
363 | dev_err(&dev->dev, |
364 | "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n", | |
365 | fmt->iface, fmt->altsetting, | |
f34d0650 EZ |
366 | get_endpoint(alts, 1)->bmAttributes, |
367 | get_endpoint(alts, 1)->bLength, | |
368 | get_endpoint(alts, 1)->bSynchAddress); | |
395ae54b PLB |
369 | if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) |
370 | return 0; | |
f34d0650 EZ |
371 | return -EINVAL; |
372 | } | |
373 | ep = get_endpoint(alts, 1)->bEndpointAddress; | |
95fec883 | 374 | if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
1b34121d | 375 | get_endpoint(alts, 0)->bSynchAddress != 0 && |
f34d0650 EZ |
376 | ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || |
377 | (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { | |
0ba41d91 TI |
378 | dev_err(&dev->dev, |
379 | "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n", | |
380 | fmt->iface, fmt->altsetting, | |
f34d0650 | 381 | is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); |
395ae54b PLB |
382 | if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) |
383 | return 0; | |
f34d0650 | 384 | return -EINVAL; |
edcd3633 | 385 | } |
e5779998 | 386 | |
f6581c0e TI |
387 | fmt->sync_ep = ep; |
388 | fmt->sync_iface = altsd->bInterfaceNumber; | |
389 | fmt->sync_altsetting = altsd->bAlternateSetting; | |
bf6313a0 | 390 | fmt->sync_ep_idx = 1; |
f6581c0e TI |
391 | if ((sync_attr & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB) |
392 | fmt->implicit_fb = 1; | |
393 | ||
394 | dev_dbg(&dev->dev, "%d:%d: found sync_ep=0x%x, iface=%d, alt=%d, implicit_fb=%d\n", | |
395 | fmt->iface, fmt->altsetting, fmt->sync_ep, fmt->sync_iface, | |
396 | fmt->sync_altsetting, fmt->implicit_fb); | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
3f59aa11 JS |
401 | static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state) |
402 | { | |
403 | int ret; | |
404 | ||
405 | if (!subs->str_pd) | |
406 | return 0; | |
407 | ||
408 | ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state); | |
409 | if (ret < 0) { | |
410 | dev_err(&subs->dev->dev, | |
411 | "Cannot change Power Domain ID: %d to state: %d. Err: %d\n", | |
412 | subs->str_pd->pd_id, state, ret); | |
413 | return ret; | |
414 | } | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | int snd_usb_pcm_suspend(struct snd_usb_stream *as) | |
420 | { | |
421 | int ret; | |
422 | ||
423 | ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2); | |
424 | if (ret < 0) | |
425 | return ret; | |
426 | ||
427 | ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2); | |
428 | if (ret < 0) | |
429 | return ret; | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
434 | int snd_usb_pcm_resume(struct snd_usb_stream *as) | |
435 | { | |
436 | int ret; | |
437 | ||
a0a4959e | 438 | ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1); |
3f59aa11 JS |
439 | if (ret < 0) |
440 | return ret; | |
441 | ||
a0a4959e | 442 | ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1); |
3f59aa11 JS |
443 | if (ret < 0) |
444 | return ret; | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
bf6313a0 TI |
449 | static void close_endpoints(struct snd_usb_audio *chip, |
450 | struct snd_usb_substream *subs) | |
451 | { | |
452 | if (subs->data_endpoint) { | |
453 | snd_usb_endpoint_set_sync(chip, subs->data_endpoint, NULL); | |
454 | snd_usb_endpoint_close(chip, subs->data_endpoint); | |
455 | subs->data_endpoint = NULL; | |
456 | } | |
457 | ||
458 | if (subs->sync_endpoint) { | |
459 | snd_usb_endpoint_close(chip, subs->sync_endpoint); | |
460 | subs->sync_endpoint = NULL; | |
461 | } | |
462 | } | |
463 | ||
e5779998 DM |
464 | /* |
465 | * hw_params callback | |
466 | * | |
467 | * allocate a buffer and set the given audio format. | |
468 | * | |
469 | * so far we use a physically linear buffer although packetize transfer | |
470 | * doesn't need a continuous area. | |
471 | * if sg buffer is supported on the later version of alsa, we'll follow | |
472 | * that. | |
473 | */ | |
474 | static int snd_usb_hw_params(struct snd_pcm_substream *substream, | |
475 | struct snd_pcm_hw_params *hw_params) | |
476 | { | |
477 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
bf6313a0 | 478 | struct snd_usb_audio *chip = subs->stream->chip; |
cab941b7 TI |
479 | const struct audioformat *fmt; |
480 | const struct audioformat *sync_fmt; | |
fd28941c | 481 | bool fixed_rate, sync_fixed_rate; |
61a70950 | 482 | int ret; |
e5779998 | 483 | |
66354f18 SK |
484 | ret = snd_media_start_pipeline(subs); |
485 | if (ret) | |
486 | return ret; | |
487 | ||
fd28941c | 488 | fixed_rate = snd_usb_pcm_has_fixed_rate(subs); |
bf6313a0 | 489 | fmt = find_substream_format(subs, hw_params); |
e5779998 | 490 | if (!fmt) { |
bf6313a0 TI |
491 | usb_audio_dbg(chip, |
492 | "cannot find format: format=%s, rate=%d, channels=%d\n", | |
493 | snd_pcm_format_name(params_format(hw_params)), | |
494 | params_rate(hw_params), params_channels(hw_params)); | |
66354f18 SK |
495 | ret = -EINVAL; |
496 | goto stop_pipeline; | |
e5779998 DM |
497 | } |
498 | ||
9fddc15e TI |
499 | if (fmt->implicit_fb) { |
500 | sync_fmt = snd_usb_find_implicit_fb_sync_format(chip, fmt, | |
501 | hw_params, | |
fd28941c JK |
502 | !substream->stream, |
503 | &sync_fixed_rate); | |
bf6313a0 TI |
504 | if (!sync_fmt) { |
505 | usb_audio_dbg(chip, | |
506 | "cannot find sync format: ep=0x%x, iface=%d:%d, format=%s, rate=%d, channels=%d\n", | |
507 | fmt->sync_ep, fmt->sync_iface, | |
508 | fmt->sync_altsetting, | |
509 | snd_pcm_format_name(params_format(hw_params)), | |
510 | params_rate(hw_params), params_channels(hw_params)); | |
511 | ret = -EINVAL; | |
512 | goto stop_pipeline; | |
513 | } | |
514 | } else { | |
515 | sync_fmt = fmt; | |
fd28941c | 516 | sync_fixed_rate = fixed_rate; |
bf6313a0 TI |
517 | } |
518 | ||
519 | ret = snd_usb_lock_shutdown(chip); | |
47ab1545 | 520 | if (ret < 0) |
66354f18 | 521 | goto stop_pipeline; |
a0a4959e JS |
522 | |
523 | ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); | |
524 | if (ret < 0) | |
525 | goto unlock; | |
526 | ||
bf6313a0 TI |
527 | if (subs->data_endpoint) { |
528 | if (snd_usb_endpoint_compatible(chip, subs->data_endpoint, | |
529 | fmt, hw_params)) | |
530 | goto unlock; | |
0599313e TI |
531 | if (stop_endpoints(subs, false)) |
532 | sync_pending_stops(subs); | |
bf6313a0 TI |
533 | close_endpoints(chip, subs); |
534 | } | |
535 | ||
fd28941c | 536 | subs->data_endpoint = snd_usb_endpoint_open(chip, fmt, hw_params, false, fixed_rate); |
bf6313a0 TI |
537 | if (!subs->data_endpoint) { |
538 | ret = -EINVAL; | |
539 | goto unlock; | |
540 | } | |
541 | ||
542 | if (fmt->sync_ep) { | |
543 | subs->sync_endpoint = snd_usb_endpoint_open(chip, sync_fmt, | |
544 | hw_params, | |
fd28941c JK |
545 | fmt == sync_fmt, |
546 | sync_fixed_rate); | |
bf6313a0 TI |
547 | if (!subs->sync_endpoint) { |
548 | ret = -EINVAL; | |
549 | goto unlock; | |
550 | } | |
551 | ||
552 | snd_usb_endpoint_set_sync(chip, subs->data_endpoint, | |
553 | subs->sync_endpoint); | |
554 | } | |
555 | ||
6aa719d1 | 556 | mutex_lock(&chip->mutex); |
bf6313a0 | 557 | subs->cur_audiofmt = fmt; |
6aa719d1 | 558 | mutex_unlock(&chip->mutex); |
bf6313a0 | 559 | |
2be79d58 TI |
560 | if (!subs->data_endpoint->need_setup) |
561 | goto unlock; | |
562 | ||
563 | if (subs->sync_endpoint) { | |
564 | ret = snd_usb_endpoint_set_params(chip, subs->sync_endpoint); | |
565 | if (ret < 0) | |
566 | goto unlock; | |
567 | } | |
568 | ||
569 | ret = snd_usb_endpoint_set_params(chip, subs->data_endpoint); | |
bf6313a0 | 570 | |
a0a4959e | 571 | unlock: |
66354f18 | 572 | if (ret < 0) |
bf6313a0 | 573 | close_endpoints(chip, subs); |
66354f18 | 574 | |
bf6313a0 | 575 | snd_usb_unlock_shutdown(chip); |
66354f18 | 576 | stop_pipeline: |
bf6313a0 TI |
577 | if (ret < 0) |
578 | snd_media_stop_pipeline(subs); | |
579 | ||
a0a4959e | 580 | return ret; |
e5779998 DM |
581 | } |
582 | ||
583 | /* | |
584 | * hw_free callback | |
585 | * | |
586 | * reset the audio format and release the buffer | |
587 | */ | |
588 | static int snd_usb_hw_free(struct snd_pcm_substream *substream) | |
589 | { | |
590 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
5a6c3e11 | 591 | struct snd_usb_audio *chip = subs->stream->chip; |
e5779998 | 592 | |
66354f18 | 593 | snd_media_stop_pipeline(subs); |
6aa719d1 | 594 | mutex_lock(&chip->mutex); |
e5779998 | 595 | subs->cur_audiofmt = NULL; |
6aa719d1 | 596 | mutex_unlock(&chip->mutex); |
5a6c3e11 | 597 | if (!snd_usb_lock_shutdown(chip)) { |
813a17ca | 598 | if (stop_endpoints(subs, false)) |
bf6313a0 TI |
599 | sync_pending_stops(subs); |
600 | close_endpoints(chip, subs); | |
5a6c3e11 | 601 | snd_usb_unlock_shutdown(chip); |
978520b7 | 602 | } |
f274baa4 | 603 | |
6dd9486c | 604 | return 0; |
e5779998 DM |
605 | } |
606 | ||
eee5d6f1 TI |
607 | /* free-wheeling mode? (e.g. dmix) */ |
608 | static int in_free_wheeling_mode(struct snd_pcm_runtime *runtime) | |
609 | { | |
610 | return runtime->stop_threshold > runtime->buffer_size; | |
611 | } | |
612 | ||
9c9a3b9d | 613 | /* check whether early start is needed for playback stream */ |
e581f1ce TI |
614 | static int lowlatency_playback_available(struct snd_pcm_runtime *runtime, |
615 | struct snd_usb_substream *subs) | |
9c9a3b9d TI |
616 | { |
617 | struct snd_usb_audio *chip = subs->stream->chip; | |
618 | ||
619 | if (subs->direction == SNDRV_PCM_STREAM_CAPTURE) | |
620 | return false; | |
621 | /* disabled via module option? */ | |
622 | if (!chip->lowlatency) | |
623 | return false; | |
eee5d6f1 | 624 | if (in_free_wheeling_mode(runtime)) |
e581f1ce | 625 | return false; |
bceee753 TI |
626 | /* implicit feedback mode has own operation mode */ |
627 | if (snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint)) | |
628 | return false; | |
9c9a3b9d TI |
629 | return true; |
630 | } | |
631 | ||
e5779998 DM |
632 | /* |
633 | * prepare callback | |
634 | * | |
635 | * only a few subtle things... | |
636 | */ | |
637 | static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) | |
638 | { | |
639 | struct snd_pcm_runtime *runtime = substream->runtime; | |
640 | struct snd_usb_substream *subs = runtime->private_data; | |
bf6313a0 | 641 | struct snd_usb_audio *chip = subs->stream->chip; |
198dde08 | 642 | int retry = 0; |
61a70950 | 643 | int ret; |
e5779998 | 644 | |
bf6313a0 | 645 | ret = snd_usb_lock_shutdown(chip); |
47ab1545 TI |
646 | if (ret < 0) |
647 | return ret; | |
978520b7 TI |
648 | if (snd_BUG_ON(!subs->data_endpoint)) { |
649 | ret = -EIO; | |
650 | goto unlock; | |
651 | } | |
edcd3633 | 652 | |
8ba61c9f TI |
653 | ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); |
654 | if (ret < 0) | |
655 | goto unlock; | |
656 | ||
198dde08 | 657 | again: |
2be79d58 TI |
658 | if (subs->sync_endpoint) { |
659 | ret = snd_usb_endpoint_prepare(chip, subs->sync_endpoint); | |
660 | if (ret < 0) | |
661 | goto unlock; | |
662 | } | |
663 | ||
664 | ret = snd_usb_endpoint_prepare(chip, subs->data_endpoint); | |
61a70950 | 665 | if (ret < 0) |
978520b7 | 666 | goto unlock; |
2be79d58 TI |
667 | else if (ret > 0) |
668 | snd_usb_set_format_quirk(subs, subs->cur_audiofmt); | |
669 | ret = 0; | |
61a70950 | 670 | |
e5779998 | 671 | /* reset the pointer */ |
d303c5d3 | 672 | subs->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size); |
e8a8f09c | 673 | subs->inflight_bytes = 0; |
e5779998 DM |
674 | subs->hwptr_done = 0; |
675 | subs->transfer_done = 0; | |
294c4fb8 | 676 | subs->last_frame_number = 0; |
307cc9ba | 677 | subs->period_elapsed_pending = 0; |
e5779998 DM |
678 | runtime->delay = 0; |
679 | ||
e581f1ce | 680 | subs->lowlatency_playback = lowlatency_playback_available(runtime, subs); |
83de8f83 | 681 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
198dde08 | 682 | !subs->lowlatency_playback) { |
4267c5a8 | 683 | ret = start_endpoints(subs); |
198dde08 TI |
684 | /* if XRUN happens at starting streams (possibly with implicit |
685 | * fb case), restart again, but only try once. | |
686 | */ | |
687 | if (ret == -EPIPE && !retry++) { | |
688 | sync_pending_stops(subs); | |
689 | goto again; | |
690 | } | |
691 | } | |
978520b7 | 692 | unlock: |
bf6313a0 | 693 | snd_usb_unlock_shutdown(chip); |
978520b7 | 694 | return ret; |
e5779998 DM |
695 | } |
696 | ||
7ec827b9 TI |
697 | /* |
698 | * h/w constraints | |
699 | */ | |
700 | ||
701 | #ifdef HW_CONST_DEBUG | |
702 | #define hwc_debug(fmt, args...) pr_debug(fmt, ##args) | |
703 | #else | |
704 | #define hwc_debug(fmt, args...) do { } while(0) | |
705 | #endif | |
706 | ||
aaffbf78 | 707 | static const struct snd_pcm_hardware snd_usb_hardware = |
e5779998 DM |
708 | { |
709 | .info = SNDRV_PCM_INFO_MMAP | | |
710 | SNDRV_PCM_INFO_MMAP_VALID | | |
711 | SNDRV_PCM_INFO_BATCH | | |
712 | SNDRV_PCM_INFO_INTERLEAVED | | |
713 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
714 | SNDRV_PCM_INFO_PAUSE, | |
bf6313a0 TI |
715 | .channels_min = 1, |
716 | .channels_max = 256, | |
24d0c9f0 | 717 | .buffer_bytes_max = INT_MAX, /* limited by BUFFER_TIME later */ |
e5779998 | 718 | .period_bytes_min = 64, |
24d0c9f0 | 719 | .period_bytes_max = INT_MAX, /* limited by PERIOD_TIME later */ |
e5779998 DM |
720 | .periods_min = 2, |
721 | .periods_max = 1024, | |
722 | }; | |
723 | ||
724 | static int hw_check_valid_format(struct snd_usb_substream *subs, | |
725 | struct snd_pcm_hw_params *params, | |
cab941b7 | 726 | const struct audioformat *fp) |
e5779998 DM |
727 | { |
728 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
729 | struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); | |
730 | struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
731 | struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); | |
015eb0b0 | 732 | struct snd_mask check_fmts; |
e5779998 DM |
733 | unsigned int ptime; |
734 | ||
735 | /* check the format */ | |
015eb0b0 CL |
736 | snd_mask_none(&check_fmts); |
737 | check_fmts.bits[0] = (u32)fp->formats; | |
738 | check_fmts.bits[1] = (u32)(fp->formats >> 32); | |
739 | snd_mask_intersect(&check_fmts, fmts); | |
740 | if (snd_mask_empty(&check_fmts)) { | |
e4ea77f8 | 741 | hwc_debug(" > check: no supported format 0x%llx\n", fp->formats); |
e5779998 DM |
742 | return 0; |
743 | } | |
744 | /* check the channels */ | |
745 | if (fp->channels < ct->min || fp->channels > ct->max) { | |
746 | hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); | |
747 | return 0; | |
748 | } | |
749 | /* check the rate is within the range */ | |
750 | if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { | |
751 | hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); | |
752 | return 0; | |
753 | } | |
754 | if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { | |
755 | hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); | |
756 | return 0; | |
757 | } | |
758 | /* check whether the period time is >= the data packet interval */ | |
978520b7 | 759 | if (subs->speed != USB_SPEED_FULL) { |
e5779998 DM |
760 | ptime = 125 * (1 << fp->datainterval); |
761 | if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { | |
762 | hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); | |
763 | return 0; | |
764 | } | |
765 | } | |
766 | return 1; | |
767 | } | |
768 | ||
7726dce1 TI |
769 | static int apply_hw_params_minmax(struct snd_interval *it, unsigned int rmin, |
770 | unsigned int rmax) | |
771 | { | |
772 | int changed; | |
773 | ||
774 | if (rmin > rmax) { | |
775 | hwc_debug(" --> get empty\n"); | |
776 | it->empty = 1; | |
777 | return -EINVAL; | |
778 | } | |
779 | ||
780 | changed = 0; | |
781 | if (it->min < rmin) { | |
782 | it->min = rmin; | |
783 | it->openmin = 0; | |
784 | changed = 1; | |
785 | } | |
786 | if (it->max > rmax) { | |
787 | it->max = rmax; | |
788 | it->openmax = 0; | |
789 | changed = 1; | |
790 | } | |
791 | if (snd_interval_checkempty(it)) { | |
792 | it->empty = 1; | |
793 | return -EINVAL; | |
794 | } | |
795 | hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); | |
796 | return changed; | |
797 | } | |
798 | ||
37b3e56d TI |
799 | /* get the specified endpoint object that is being used by other streams |
800 | * (i.e. the parameter is locked) | |
801 | */ | |
802 | static const struct snd_usb_endpoint * | |
803 | get_endpoint_in_use(struct snd_usb_audio *chip, int endpoint, | |
804 | const struct snd_usb_endpoint *ref_ep) | |
805 | { | |
806 | const struct snd_usb_endpoint *ep; | |
807 | ||
808 | ep = snd_usb_get_endpoint(chip, endpoint); | |
809 | if (ep && ep->cur_audiofmt && (ep != ref_ep || ep->opened > 1)) | |
810 | return ep; | |
811 | return NULL; | |
812 | } | |
813 | ||
e5779998 DM |
814 | static int hw_rule_rate(struct snd_pcm_hw_params *params, |
815 | struct snd_pcm_hw_rule *rule) | |
816 | { | |
817 | struct snd_usb_substream *subs = rule->private; | |
4e7cf1fb | 818 | struct snd_usb_audio *chip = subs->stream->chip; |
37b3e56d | 819 | const struct snd_usb_endpoint *ep; |
cab941b7 | 820 | const struct audioformat *fp; |
e5779998 | 821 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
bc4e94aa | 822 | unsigned int rmin, rmax, r; |
bc4e94aa | 823 | int i; |
e5779998 DM |
824 | |
825 | hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); | |
bc4e94aa TI |
826 | rmin = UINT_MAX; |
827 | rmax = 0; | |
88766f04 | 828 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
829 | if (!hw_check_valid_format(subs, params, fp)) |
830 | continue; | |
37b3e56d TI |
831 | |
832 | ep = get_endpoint_in_use(chip, fp->endpoint, | |
833 | subs->data_endpoint); | |
834 | if (ep) { | |
835 | hwc_debug("rate limit %d for ep#%x\n", | |
836 | ep->cur_rate, fp->endpoint); | |
837 | rmin = min(rmin, ep->cur_rate); | |
838 | rmax = max(rmax, ep->cur_rate); | |
839 | continue; | |
840 | } | |
841 | ||
842 | if (fp->implicit_fb) { | |
843 | ep = get_endpoint_in_use(chip, fp->sync_ep, | |
844 | subs->sync_endpoint); | |
845 | if (ep) { | |
846 | hwc_debug("rate limit %d for sync_ep#%x\n", | |
847 | ep->cur_rate, fp->sync_ep); | |
848 | rmin = min(rmin, ep->cur_rate); | |
849 | rmax = max(rmax, ep->cur_rate); | |
850 | continue; | |
851 | } | |
852 | } | |
853 | ||
4e7cf1fb TI |
854 | r = snd_usb_endpoint_get_clock_rate(chip, fp->clock); |
855 | if (r > 0) { | |
856 | if (!snd_interval_test(it, r)) | |
857 | continue; | |
858 | rmin = min(rmin, r); | |
859 | rmax = max(rmax, r); | |
860 | continue; | |
861 | } | |
bc4e94aa TI |
862 | if (fp->rate_table && fp->nr_rates) { |
863 | for (i = 0; i < fp->nr_rates; i++) { | |
864 | r = fp->rate_table[i]; | |
865 | if (!snd_interval_test(it, r)) | |
866 | continue; | |
867 | rmin = min(rmin, r); | |
868 | rmax = max(rmax, r); | |
869 | } | |
e5779998 | 870 | } else { |
bc4e94aa TI |
871 | rmin = min(rmin, fp->rate_min); |
872 | rmax = max(rmax, fp->rate_max); | |
e5779998 DM |
873 | } |
874 | } | |
875 | ||
7726dce1 | 876 | return apply_hw_params_minmax(it, rmin, rmax); |
e5779998 DM |
877 | } |
878 | ||
879 | ||
880 | static int hw_rule_channels(struct snd_pcm_hw_params *params, | |
881 | struct snd_pcm_hw_rule *rule) | |
882 | { | |
883 | struct snd_usb_substream *subs = rule->private; | |
cab941b7 | 884 | const struct audioformat *fp; |
e5779998 DM |
885 | struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
886 | unsigned int rmin, rmax; | |
e5779998 DM |
887 | |
888 | hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); | |
7726dce1 TI |
889 | rmin = UINT_MAX; |
890 | rmax = 0; | |
88766f04 | 891 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
892 | if (!hw_check_valid_format(subs, params, fp)) |
893 | continue; | |
7726dce1 TI |
894 | rmin = min(rmin, fp->channels); |
895 | rmax = max(rmax, fp->channels); | |
e5779998 DM |
896 | } |
897 | ||
7726dce1 | 898 | return apply_hw_params_minmax(it, rmin, rmax); |
e5779998 DM |
899 | } |
900 | ||
e4ea77f8 | 901 | static int apply_hw_params_format_bits(struct snd_mask *fmt, u64 fbits) |
e5779998 | 902 | { |
e5779998 DM |
903 | u32 oldbits[2]; |
904 | int changed; | |
905 | ||
e5779998 DM |
906 | oldbits[0] = fmt->bits[0]; |
907 | oldbits[1] = fmt->bits[1]; | |
908 | fmt->bits[0] &= (u32)fbits; | |
909 | fmt->bits[1] &= (u32)(fbits >> 32); | |
910 | if (!fmt->bits[0] && !fmt->bits[1]) { | |
911 | hwc_debug(" --> get empty\n"); | |
912 | return -EINVAL; | |
913 | } | |
914 | changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); | |
915 | hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); | |
916 | return changed; | |
917 | } | |
918 | ||
e4ea77f8 TI |
919 | static int hw_rule_format(struct snd_pcm_hw_params *params, |
920 | struct snd_pcm_hw_rule *rule) | |
921 | { | |
922 | struct snd_usb_substream *subs = rule->private; | |
37b3e56d TI |
923 | struct snd_usb_audio *chip = subs->stream->chip; |
924 | const struct snd_usb_endpoint *ep; | |
e4ea77f8 TI |
925 | const struct audioformat *fp; |
926 | struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); | |
927 | u64 fbits; | |
928 | ||
929 | hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); | |
930 | fbits = 0; | |
931 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
932 | if (!hw_check_valid_format(subs, params, fp)) | |
933 | continue; | |
37b3e56d TI |
934 | |
935 | ep = get_endpoint_in_use(chip, fp->endpoint, | |
936 | subs->data_endpoint); | |
937 | if (ep) { | |
938 | hwc_debug("format limit %d for ep#%x\n", | |
939 | ep->cur_format, fp->endpoint); | |
940 | fbits |= pcm_format_to_bits(ep->cur_format); | |
941 | continue; | |
942 | } | |
943 | ||
944 | if (fp->implicit_fb) { | |
945 | ep = get_endpoint_in_use(chip, fp->sync_ep, | |
946 | subs->sync_endpoint); | |
947 | if (ep) { | |
948 | hwc_debug("format limit %d for sync_ep#%x\n", | |
949 | ep->cur_format, fp->sync_ep); | |
950 | fbits |= pcm_format_to_bits(ep->cur_format); | |
951 | continue; | |
952 | } | |
953 | } | |
954 | ||
e4ea77f8 TI |
955 | fbits |= fp->formats; |
956 | } | |
957 | return apply_hw_params_format_bits(fmt, fbits); | |
958 | } | |
959 | ||
e5779998 DM |
960 | static int hw_rule_period_time(struct snd_pcm_hw_params *params, |
961 | struct snd_pcm_hw_rule *rule) | |
962 | { | |
963 | struct snd_usb_substream *subs = rule->private; | |
cab941b7 | 964 | const struct audioformat *fp; |
e5779998 DM |
965 | struct snd_interval *it; |
966 | unsigned char min_datainterval; | |
967 | unsigned int pmin; | |
e5779998 DM |
968 | |
969 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); | |
970 | hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); | |
971 | min_datainterval = 0xff; | |
972 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
973 | if (!hw_check_valid_format(subs, params, fp)) | |
974 | continue; | |
975 | min_datainterval = min(min_datainterval, fp->datainterval); | |
976 | } | |
977 | if (min_datainterval == 0xff) { | |
a7ce2e0d | 978 | hwc_debug(" --> get empty\n"); |
e5779998 DM |
979 | it->empty = 1; |
980 | return -EINVAL; | |
981 | } | |
982 | pmin = 125 * (1 << min_datainterval); | |
7726dce1 TI |
983 | |
984 | return apply_hw_params_minmax(it, pmin, UINT_MAX); | |
e5779998 DM |
985 | } |
986 | ||
37b3e56d TI |
987 | /* additional hw constraints for implicit feedback mode */ |
988 | static int hw_rule_period_size_implicit_fb(struct snd_pcm_hw_params *params, | |
989 | struct snd_pcm_hw_rule *rule) | |
5a6c3e11 | 990 | { |
37b3e56d | 991 | struct snd_usb_substream *subs = rule->private; |
5a6c3e11 | 992 | struct snd_usb_audio *chip = subs->stream->chip; |
cab941b7 | 993 | const struct audioformat *fp; |
e4ea77f8 | 994 | const struct snd_usb_endpoint *ep; |
37b3e56d TI |
995 | struct snd_interval *it; |
996 | unsigned int rmin, rmax; | |
5a6c3e11 | 997 | |
37b3e56d TI |
998 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); |
999 | hwc_debug("hw_rule_period_size: (%u,%u)\n", it->min, it->max); | |
1000 | rmin = UINT_MAX; | |
1001 | rmax = 0; | |
5a6c3e11 | 1002 | list_for_each_entry(fp, &subs->fmt_list, list) { |
37b3e56d TI |
1003 | if (!hw_check_valid_format(subs, params, fp)) |
1004 | continue; | |
1005 | ep = get_endpoint_in_use(chip, fp->endpoint, | |
1006 | subs->data_endpoint); | |
1007 | if (ep) { | |
1008 | hwc_debug("period size limit %d for ep#%x\n", | |
1009 | ep->cur_period_frames, fp->endpoint); | |
1010 | rmin = min(rmin, ep->cur_period_frames); | |
1011 | rmax = max(rmax, ep->cur_period_frames); | |
5a6c3e11 | 1012 | continue; |
d463ac1a | 1013 | } |
5a6c3e11 | 1014 | |
37b3e56d TI |
1015 | if (fp->implicit_fb) { |
1016 | ep = get_endpoint_in_use(chip, fp->sync_ep, | |
1017 | subs->sync_endpoint); | |
1018 | if (ep) { | |
1019 | hwc_debug("period size limit %d for sync_ep#%x\n", | |
1020 | ep->cur_period_frames, fp->sync_ep); | |
1021 | rmin = min(rmin, ep->cur_period_frames); | |
1022 | rmax = max(rmax, ep->cur_period_frames); | |
1023 | continue; | |
1024 | } | |
1025 | } | |
1026 | } | |
e4ea77f8 | 1027 | |
37b3e56d TI |
1028 | if (!rmax) |
1029 | return 0; /* no limit by implicit fb */ | |
1030 | return apply_hw_params_minmax(it, rmin, rmax); | |
e4ea77f8 TI |
1031 | } |
1032 | ||
1033 | static int hw_rule_periods_implicit_fb(struct snd_pcm_hw_params *params, | |
1034 | struct snd_pcm_hw_rule *rule) | |
1035 | { | |
1036 | struct snd_usb_substream *subs = rule->private; | |
37b3e56d TI |
1037 | struct snd_usb_audio *chip = subs->stream->chip; |
1038 | const struct audioformat *fp; | |
e4ea77f8 TI |
1039 | const struct snd_usb_endpoint *ep; |
1040 | struct snd_interval *it; | |
37b3e56d | 1041 | unsigned int rmin, rmax; |
e4ea77f8 | 1042 | |
e4ea77f8 | 1043 | it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIODS); |
37b3e56d TI |
1044 | hwc_debug("hw_rule_periods: (%u,%u)\n", it->min, it->max); |
1045 | rmin = UINT_MAX; | |
1046 | rmax = 0; | |
1047 | list_for_each_entry(fp, &subs->fmt_list, list) { | |
1048 | if (!hw_check_valid_format(subs, params, fp)) | |
1049 | continue; | |
1050 | ep = get_endpoint_in_use(chip, fp->endpoint, | |
1051 | subs->data_endpoint); | |
1052 | if (ep) { | |
1053 | hwc_debug("periods limit %d for ep#%x\n", | |
1054 | ep->cur_buffer_periods, fp->endpoint); | |
1055 | rmin = min(rmin, ep->cur_buffer_periods); | |
1056 | rmax = max(rmax, ep->cur_buffer_periods); | |
1057 | continue; | |
1058 | } | |
1059 | ||
1060 | if (fp->implicit_fb) { | |
1061 | ep = get_endpoint_in_use(chip, fp->sync_ep, | |
1062 | subs->sync_endpoint); | |
1063 | if (ep) { | |
1064 | hwc_debug("periods limit %d for sync_ep#%x\n", | |
1065 | ep->cur_buffer_periods, fp->sync_ep); | |
1066 | rmin = min(rmin, ep->cur_buffer_periods); | |
1067 | rmax = max(rmax, ep->cur_buffer_periods); | |
1068 | continue; | |
1069 | } | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | if (!rmax) | |
1074 | return 0; /* no limit by implicit fb */ | |
1075 | return apply_hw_params_minmax(it, rmin, rmax); | |
5a6c3e11 | 1076 | } |
e5779998 DM |
1077 | |
1078 | /* | |
1079 | * set up the runtime hardware information. | |
1080 | */ | |
1081 | ||
1082 | static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) | |
1083 | { | |
cab941b7 | 1084 | const struct audioformat *fp; |
e5779998 | 1085 | unsigned int pt, ptmin; |
5a6c3e11 | 1086 | int param_period_time_if_needed = -1; |
e5779998 DM |
1087 | int err; |
1088 | ||
1089 | runtime->hw.formats = subs->formats; | |
1090 | ||
1091 | runtime->hw.rate_min = 0x7fffffff; | |
1092 | runtime->hw.rate_max = 0; | |
1093 | runtime->hw.channels_min = 256; | |
1094 | runtime->hw.channels_max = 0; | |
1095 | runtime->hw.rates = 0; | |
1096 | ptmin = UINT_MAX; | |
1097 | /* check min/max rates and channels */ | |
88766f04 | 1098 | list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998 DM |
1099 | runtime->hw.rates |= fp->rates; |
1100 | if (runtime->hw.rate_min > fp->rate_min) | |
1101 | runtime->hw.rate_min = fp->rate_min; | |
1102 | if (runtime->hw.rate_max < fp->rate_max) | |
1103 | runtime->hw.rate_max = fp->rate_max; | |
1104 | if (runtime->hw.channels_min > fp->channels) | |
1105 | runtime->hw.channels_min = fp->channels; | |
1106 | if (runtime->hw.channels_max < fp->channels) | |
1107 | runtime->hw.channels_max = fp->channels; | |
1108 | if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { | |
1109 | /* FIXME: there might be more than one audio formats... */ | |
1110 | runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = | |
1111 | fp->frame_size; | |
1112 | } | |
1113 | pt = 125 * (1 << fp->datainterval); | |
1114 | ptmin = min(ptmin, pt); | |
1115 | } | |
1116 | ||
1117 | param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; | |
978520b7 | 1118 | if (subs->speed == USB_SPEED_FULL) |
e5779998 DM |
1119 | /* full speed devices have fixed data packet interval */ |
1120 | ptmin = 1000; | |
1121 | if (ptmin == 1000) | |
1122 | /* if period time doesn't go below 1 ms, no rules needed */ | |
1123 | param_period_time_if_needed = -1; | |
e92be814 TI |
1124 | |
1125 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1126 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1127 | ptmin, UINT_MAX); | |
1128 | if (err < 0) | |
1129 | return err; | |
1130 | ||
1131 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, | |
1132 | hw_rule_rate, subs, | |
506c203c | 1133 | SNDRV_PCM_HW_PARAM_RATE, |
e92be814 TI |
1134 | SNDRV_PCM_HW_PARAM_FORMAT, |
1135 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1136 | param_period_time_if_needed, | |
1137 | -1); | |
1138 | if (err < 0) | |
1139 | return err; | |
5a6c3e11 | 1140 | |
e92be814 TI |
1141 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
1142 | hw_rule_channels, subs, | |
506c203c | 1143 | SNDRV_PCM_HW_PARAM_CHANNELS, |
e92be814 TI |
1144 | SNDRV_PCM_HW_PARAM_FORMAT, |
1145 | SNDRV_PCM_HW_PARAM_RATE, | |
1146 | param_period_time_if_needed, | |
1147 | -1); | |
1148 | if (err < 0) | |
1149 | return err; | |
1150 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, | |
1151 | hw_rule_format, subs, | |
506c203c | 1152 | SNDRV_PCM_HW_PARAM_FORMAT, |
e92be814 TI |
1153 | SNDRV_PCM_HW_PARAM_RATE, |
1154 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1155 | param_period_time_if_needed, | |
1156 | -1); | |
1157 | if (err < 0) | |
1158 | return err; | |
e5779998 DM |
1159 | if (param_period_time_if_needed >= 0) { |
1160 | err = snd_pcm_hw_rule_add(runtime, 0, | |
1161 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1162 | hw_rule_period_time, subs, | |
1163 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1164 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1165 | SNDRV_PCM_HW_PARAM_RATE, | |
1166 | -1); | |
1167 | if (err < 0) | |
e92be814 | 1168 | return err; |
e5779998 | 1169 | } |
88a8516a | 1170 | |
24d0c9f0 TI |
1171 | /* set max period and buffer sizes for 1 and 2 seconds, respectively */ |
1172 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1173 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1174 | 0, 1000000); | |
1175 | if (err < 0) | |
1176 | return err; | |
1177 | err = snd_pcm_hw_constraint_minmax(runtime, | |
1178 | SNDRV_PCM_HW_PARAM_BUFFER_TIME, | |
1179 | 0, 2000000); | |
1180 | if (err < 0) | |
1181 | return err; | |
1182 | ||
e4ea77f8 | 1183 | /* additional hw constraints for implicit fb */ |
e4ea77f8 TI |
1184 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, |
1185 | hw_rule_period_size_implicit_fb, subs, | |
1186 | SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); | |
1187 | if (err < 0) | |
1188 | return err; | |
1189 | err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, | |
1190 | hw_rule_periods_implicit_fb, subs, | |
1191 | SNDRV_PCM_HW_PARAM_PERIODS, -1); | |
1192 | if (err < 0) | |
1193 | return err; | |
1194 | ||
59d7f5f6 TI |
1195 | list_for_each_entry(fp, &subs->fmt_list, list) { |
1196 | if (fp->implicit_fb) { | |
1197 | runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; | |
1198 | break; | |
1199 | } | |
1200 | } | |
1201 | ||
1865211d | 1202 | return 0; |
e5779998 DM |
1203 | } |
1204 | ||
6fddc797 | 1205 | static int snd_usb_pcm_open(struct snd_pcm_substream *substream) |
e5779998 | 1206 | { |
6fddc797 | 1207 | int direction = substream->stream; |
e5779998 DM |
1208 | struct snd_usb_stream *as = snd_pcm_substream_chip(substream); |
1209 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1210 | struct snd_usb_substream *subs = &as->substream[direction]; | |
66354f18 | 1211 | int ret; |
e5779998 | 1212 | |
e5779998 | 1213 | runtime->hw = snd_usb_hardware; |
d5f871f8 TI |
1214 | /* need an explicit sync to catch applptr update in low-latency mode */ |
1215 | if (direction == SNDRV_PCM_STREAM_PLAYBACK && | |
1216 | as->chip->lowlatency) | |
53451b6d | 1217 | runtime->hw.info |= SNDRV_PCM_INFO_SYNC_APPLPTR; |
e5779998 DM |
1218 | runtime->private_data = subs; |
1219 | subs->pcm_substream = substream; | |
88a8516a | 1220 | /* runtime PM is also done there */ |
d24f5061 DM |
1221 | |
1222 | /* initialize DSD/DOP context */ | |
1223 | subs->dsd_dop.byte_idx = 0; | |
1224 | subs->dsd_dop.channel = 0; | |
1225 | subs->dsd_dop.marker = 1; | |
1226 | ||
66354f18 | 1227 | ret = setup_hw_info(runtime, subs); |
1865211d TI |
1228 | if (ret < 0) |
1229 | return ret; | |
1230 | ret = snd_usb_autoresume(subs->stream->chip); | |
1231 | if (ret < 0) | |
1232 | return ret; | |
1233 | ret = snd_media_stream_init(subs, as->pcm, direction); | |
1234 | if (ret < 0) | |
1235 | snd_usb_autosuspend(subs->stream->chip); | |
66354f18 | 1236 | return ret; |
e5779998 DM |
1237 | } |
1238 | ||
6fddc797 | 1239 | static int snd_usb_pcm_close(struct snd_pcm_substream *substream) |
e5779998 | 1240 | { |
6fddc797 | 1241 | int direction = substream->stream; |
e5779998 DM |
1242 | struct snd_usb_stream *as = snd_pcm_substream_chip(substream); |
1243 | struct snd_usb_substream *subs = &as->substream[direction]; | |
a0a4959e | 1244 | int ret; |
e5779998 | 1245 | |
66354f18 | 1246 | snd_media_stop_pipeline(subs); |
68e67f40 | 1247 | |
bf6313a0 | 1248 | if (!snd_usb_lock_shutdown(subs->stream->chip)) { |
a0a4959e | 1249 | ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1); |
47ab1545 | 1250 | snd_usb_unlock_shutdown(subs->stream->chip); |
a0a4959e JS |
1251 | if (ret < 0) |
1252 | return ret; | |
68e67f40 DM |
1253 | } |
1254 | ||
e5779998 | 1255 | subs->pcm_substream = NULL; |
88a8516a | 1256 | snd_usb_autosuspend(subs->stream->chip); |
edcd3633 | 1257 | |
68e67f40 | 1258 | return 0; |
edcd3633 DM |
1259 | } |
1260 | ||
1261 | /* Since a URB can handle only a single linear buffer, we must use double | |
1262 | * buffering when the data to be transferred overflows the buffer boundary. | |
1263 | * To avoid inconsistencies when updating hwptr_done, we use double buffering | |
1264 | * for all URBs. | |
1265 | */ | |
1266 | static void retire_capture_urb(struct snd_usb_substream *subs, | |
1267 | struct urb *urb) | |
1268 | { | |
1269 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1270 | unsigned int stride, frames, bytes, oldptr; | |
1271 | int i, period_elapsed = 0; | |
1272 | unsigned long flags; | |
1273 | unsigned char *cp; | |
e4cc6153 PLB |
1274 | int current_frame_number; |
1275 | ||
1276 | /* read frame number here, update pointer in critical section */ | |
1277 | current_frame_number = usb_get_current_frame_number(subs->dev); | |
edcd3633 DM |
1278 | |
1279 | stride = runtime->frame_bits >> 3; | |
1280 | ||
1281 | for (i = 0; i < urb->number_of_packets; i++) { | |
1539d4f8 | 1282 | cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj; |
edcd3633 | 1283 | if (urb->iso_frame_desc[i].status && printk_ratelimit()) { |
0ba41d91 TI |
1284 | dev_dbg(&subs->dev->dev, "frame %d active: %d\n", |
1285 | i, urb->iso_frame_desc[i].status); | |
edcd3633 DM |
1286 | // continue; |
1287 | } | |
1288 | bytes = urb->iso_frame_desc[i].actual_length; | |
1b7ecc24 HM |
1289 | if (subs->stream_offset_adj > 0) { |
1290 | unsigned int adj = min(subs->stream_offset_adj, bytes); | |
1291 | cp += adj; | |
1292 | bytes -= adj; | |
1293 | subs->stream_offset_adj -= adj; | |
1294 | } | |
edcd3633 DM |
1295 | frames = bytes / stride; |
1296 | if (!subs->txfr_quirk) | |
1297 | bytes = frames * stride; | |
1298 | if (bytes % (runtime->sample_bits >> 3) != 0) { | |
edcd3633 | 1299 | int oldbytes = bytes; |
edcd3633 | 1300 | bytes = frames * stride; |
377a879d | 1301 | dev_warn_ratelimited(&subs->dev->dev, |
0ba41d91 | 1302 | "Corrected urb data len. %d->%d\n", |
edcd3633 DM |
1303 | oldbytes, bytes); |
1304 | } | |
1305 | /* update the current pointer */ | |
1306 | spin_lock_irqsave(&subs->lock, flags); | |
1307 | oldptr = subs->hwptr_done; | |
1308 | subs->hwptr_done += bytes; | |
d303c5d3 TI |
1309 | if (subs->hwptr_done >= subs->buffer_bytes) |
1310 | subs->hwptr_done -= subs->buffer_bytes; | |
edcd3633 DM |
1311 | frames = (bytes + (oldptr % stride)) / stride; |
1312 | subs->transfer_done += frames; | |
1313 | if (subs->transfer_done >= runtime->period_size) { | |
1314 | subs->transfer_done -= runtime->period_size; | |
1315 | period_elapsed = 1; | |
1316 | } | |
e4cc6153 PLB |
1317 | |
1318 | /* realign last_frame_number */ | |
1319 | subs->last_frame_number = current_frame_number; | |
e4cc6153 | 1320 | |
edcd3633 DM |
1321 | spin_unlock_irqrestore(&subs->lock, flags); |
1322 | /* copy a data chunk */ | |
d303c5d3 TI |
1323 | if (oldptr + bytes > subs->buffer_bytes) { |
1324 | unsigned int bytes1 = subs->buffer_bytes - oldptr; | |
1325 | ||
edcd3633 DM |
1326 | memcpy(runtime->dma_area + oldptr, cp, bytes1); |
1327 | memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); | |
1328 | } else { | |
1329 | memcpy(runtime->dma_area + oldptr, cp, bytes); | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | if (period_elapsed) | |
1334 | snd_pcm_period_elapsed(subs->pcm_substream); | |
1335 | } | |
1336 | ||
e8a8f09c TI |
1337 | static void urb_ctx_queue_advance(struct snd_usb_substream *subs, |
1338 | struct urb *urb, unsigned int bytes) | |
1339 | { | |
1340 | struct snd_urb_ctx *ctx = urb->context; | |
1341 | ||
1342 | ctx->queued += bytes; | |
1343 | subs->inflight_bytes += bytes; | |
1344 | subs->hwptr_done += bytes; | |
1345 | if (subs->hwptr_done >= subs->buffer_bytes) | |
1346 | subs->hwptr_done -= subs->buffer_bytes; | |
1347 | } | |
1348 | ||
d24f5061 DM |
1349 | static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs, |
1350 | struct urb *urb, unsigned int bytes) | |
1351 | { | |
1352 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
d24f5061 DM |
1353 | unsigned int dst_idx = 0; |
1354 | unsigned int src_idx = subs->hwptr_done; | |
d303c5d3 | 1355 | unsigned int wrap = subs->buffer_bytes; |
d24f5061 DM |
1356 | u8 *dst = urb->transfer_buffer; |
1357 | u8 *src = runtime->dma_area; | |
6b2394ba | 1358 | static const u8 marker[] = { 0x05, 0xfa }; |
e8a8f09c | 1359 | unsigned int queued = 0; |
d24f5061 DM |
1360 | |
1361 | /* | |
1362 | * The DSP DOP format defines a way to transport DSD samples over | |
1363 | * normal PCM data endpoints. It requires stuffing of marker bytes | |
1364 | * (0x05 and 0xfa, alternating per sample frame), and then expects | |
1365 | * 2 additional bytes of actual payload. The whole frame is stored | |
1366 | * LSB. | |
1367 | * | |
1368 | * Hence, for a stereo transport, the buffer layout looks like this, | |
1369 | * where L refers to left channel samples and R to right. | |
1370 | * | |
1371 | * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa | |
1372 | * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa | |
1373 | * ..... | |
1374 | * | |
1375 | */ | |
1376 | ||
1377 | while (bytes--) { | |
1378 | if (++subs->dsd_dop.byte_idx == 3) { | |
1379 | /* frame boundary? */ | |
1380 | dst[dst_idx++] = marker[subs->dsd_dop.marker]; | |
1381 | src_idx += 2; | |
1382 | subs->dsd_dop.byte_idx = 0; | |
1383 | ||
1384 | if (++subs->dsd_dop.channel % runtime->channels == 0) { | |
1385 | /* alternate the marker */ | |
1386 | subs->dsd_dop.marker++; | |
1387 | subs->dsd_dop.marker %= ARRAY_SIZE(marker); | |
1388 | subs->dsd_dop.channel = 0; | |
1389 | } | |
1390 | } else { | |
1391 | /* stuff the DSD payload */ | |
1392 | int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap; | |
44dcbbb1 DM |
1393 | |
1394 | if (subs->cur_audiofmt->dsd_bitrev) | |
1395 | dst[dst_idx++] = bitrev8(src[idx]); | |
1396 | else | |
1397 | dst[dst_idx++] = src[idx]; | |
e8a8f09c | 1398 | queued++; |
d24f5061 DM |
1399 | } |
1400 | } | |
e8a8f09c TI |
1401 | |
1402 | urb_ctx_queue_advance(subs, urb, queued); | |
d24f5061 DM |
1403 | } |
1404 | ||
4f083917 TI |
1405 | /* copy bit-reversed bytes onto transfer buffer */ |
1406 | static void fill_playback_urb_dsd_bitrev(struct snd_usb_substream *subs, | |
1407 | struct urb *urb, unsigned int bytes) | |
1408 | { | |
1409 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1410 | const u8 *src = runtime->dma_area; | |
1411 | u8 *buf = urb->transfer_buffer; | |
1412 | int i, ofs = subs->hwptr_done; | |
1413 | ||
1414 | for (i = 0; i < bytes; i++) { | |
1415 | *buf++ = bitrev8(src[ofs]); | |
1416 | if (++ofs >= subs->buffer_bytes) | |
1417 | ofs = 0; | |
1418 | } | |
1419 | ||
1420 | urb_ctx_queue_advance(subs, urb, bytes); | |
1421 | } | |
1422 | ||
b97a9369 RW |
1423 | static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb, |
1424 | int offset, int stride, unsigned int bytes) | |
07a40c2f RW |
1425 | { |
1426 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
1427 | ||
d303c5d3 | 1428 | if (subs->hwptr_done + bytes > subs->buffer_bytes) { |
07a40c2f | 1429 | /* err, the transferred area goes over buffer boundary. */ |
d303c5d3 TI |
1430 | unsigned int bytes1 = subs->buffer_bytes - subs->hwptr_done; |
1431 | ||
b97a9369 | 1432 | memcpy(urb->transfer_buffer + offset, |
07a40c2f | 1433 | runtime->dma_area + subs->hwptr_done, bytes1); |
b97a9369 | 1434 | memcpy(urb->transfer_buffer + offset + bytes1, |
07a40c2f RW |
1435 | runtime->dma_area, bytes - bytes1); |
1436 | } else { | |
b97a9369 | 1437 | memcpy(urb->transfer_buffer + offset, |
07a40c2f RW |
1438 | runtime->dma_area + subs->hwptr_done, bytes); |
1439 | } | |
e8a8f09c TI |
1440 | |
1441 | urb_ctx_queue_advance(subs, urb, bytes); | |
07a40c2f RW |
1442 | } |
1443 | ||
e0570446 RW |
1444 | static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs, |
1445 | struct urb *urb, int stride, | |
1446 | unsigned int bytes) | |
1447 | { | |
1448 | __le32 packet_length; | |
1449 | int i; | |
1450 | ||
1451 | /* Put __le32 length descriptor at start of each packet. */ | |
1452 | for (i = 0; i < urb->number_of_packets; i++) { | |
1453 | unsigned int length = urb->iso_frame_desc[i].length; | |
1454 | unsigned int offset = urb->iso_frame_desc[i].offset; | |
1455 | ||
1456 | packet_length = cpu_to_le32(length); | |
1457 | offset += i * sizeof(packet_length); | |
1458 | urb->iso_frame_desc[i].offset = offset; | |
1459 | urb->iso_frame_desc[i].length += sizeof(packet_length); | |
1460 | memcpy(urb->transfer_buffer + offset, | |
1461 | &packet_length, sizeof(packet_length)); | |
1462 | copy_to_urb(subs, urb, offset + sizeof(packet_length), | |
1463 | stride, length); | |
1464 | } | |
1465 | /* Adjust transfer size accordingly. */ | |
1466 | bytes += urb->number_of_packets * sizeof(packet_length); | |
1467 | return bytes; | |
1468 | } | |
1469 | ||
d5f871f8 TI |
1470 | static int prepare_playback_urb(struct snd_usb_substream *subs, |
1471 | struct urb *urb, | |
1472 | bool in_stream_lock) | |
edcd3633 DM |
1473 | { |
1474 | struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; | |
245baf98 | 1475 | struct snd_usb_endpoint *ep = subs->data_endpoint; |
edcd3633 | 1476 | struct snd_urb_ctx *ctx = urb->context; |
d5f871f8 TI |
1477 | unsigned int frames, bytes; |
1478 | int counts; | |
1479 | unsigned int transfer_done, frame_limit, avail = 0; | |
edcd3633 DM |
1480 | int i, stride, period_elapsed = 0; |
1481 | unsigned long flags; | |
d5f871f8 | 1482 | int err = 0; |
edcd3633 | 1483 | |
d303c5d3 | 1484 | stride = ep->stride; |
edcd3633 DM |
1485 | |
1486 | frames = 0; | |
e8a8f09c | 1487 | ctx->queued = 0; |
edcd3633 | 1488 | urb->number_of_packets = 0; |
d5f871f8 | 1489 | |
edcd3633 | 1490 | spin_lock_irqsave(&subs->lock, flags); |
d5f871f8 TI |
1491 | frame_limit = subs->frame_limit + ep->max_urb_frames; |
1492 | transfer_done = subs->transfer_done; | |
1493 | ||
1494 | if (subs->lowlatency_playback && | |
d8b4efee | 1495 | runtime->state != SNDRV_PCM_STATE_DRAINING) { |
d5f871f8 TI |
1496 | unsigned int hwptr = subs->hwptr_done / stride; |
1497 | ||
1498 | /* calculate the byte offset-in-buffer of the appl_ptr */ | |
1499 | avail = (runtime->control->appl_ptr - runtime->hw_ptr_base) | |
1500 | % runtime->buffer_size; | |
1501 | if (avail <= hwptr) | |
1502 | avail += runtime->buffer_size; | |
1503 | avail -= hwptr; | |
1504 | } | |
1505 | ||
edcd3633 | 1506 | for (i = 0; i < ctx->packets; i++) { |
d5f871f8 TI |
1507 | counts = snd_usb_endpoint_next_packet_size(ep, ctx, i, avail); |
1508 | if (counts < 0) | |
1509 | break; | |
edcd3633 | 1510 | /* set up descriptor */ |
d303c5d3 TI |
1511 | urb->iso_frame_desc[i].offset = frames * stride; |
1512 | urb->iso_frame_desc[i].length = counts * stride; | |
edcd3633 | 1513 | frames += counts; |
d5f871f8 | 1514 | avail -= counts; |
edcd3633 | 1515 | urb->number_of_packets++; |
d5f871f8 TI |
1516 | transfer_done += counts; |
1517 | if (transfer_done >= runtime->period_size) { | |
1518 | transfer_done -= runtime->period_size; | |
1519 | frame_limit = 0; | |
edcd3633 DM |
1520 | period_elapsed = 1; |
1521 | if (subs->fmt_type == UAC_FORMAT_TYPE_II) { | |
d5f871f8 | 1522 | if (transfer_done > 0) { |
edcd3633 DM |
1523 | /* FIXME: fill-max mode is not |
1524 | * supported yet */ | |
d5f871f8 TI |
1525 | frames -= transfer_done; |
1526 | counts -= transfer_done; | |
edcd3633 | 1527 | urb->iso_frame_desc[i].length = |
d303c5d3 | 1528 | counts * stride; |
d5f871f8 | 1529 | transfer_done = 0; |
edcd3633 DM |
1530 | } |
1531 | i++; | |
1532 | if (i < ctx->packets) { | |
1533 | /* add a transfer delimiter */ | |
1534 | urb->iso_frame_desc[i].offset = | |
d303c5d3 | 1535 | frames * stride; |
edcd3633 DM |
1536 | urb->iso_frame_desc[i].length = 0; |
1537 | urb->number_of_packets++; | |
1538 | } | |
1539 | break; | |
1540 | } | |
1541 | } | |
976b6c06 | 1542 | /* finish at the period boundary or after enough frames */ |
d5f871f8 | 1543 | if ((period_elapsed || transfer_done >= frame_limit) && |
976b6c06 | 1544 | !snd_usb_endpoint_implicit_feedback_sink(ep)) |
edcd3633 DM |
1545 | break; |
1546 | } | |
d24f5061 | 1547 | |
d5f871f8 TI |
1548 | if (!frames) { |
1549 | err = -EAGAIN; | |
1550 | goto unlock; | |
1551 | } | |
1552 | ||
1553 | bytes = frames * stride; | |
1554 | subs->transfer_done = transfer_done; | |
1555 | subs->frame_limit = frame_limit; | |
6aa719d1 | 1556 | if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U16_LE && |
d24f5061 DM |
1557 | subs->cur_audiofmt->dsd_dop)) { |
1558 | fill_playback_urb_dsd_dop(subs, urb, bytes); | |
6aa719d1 | 1559 | } else if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U8 && |
44dcbbb1 | 1560 | subs->cur_audiofmt->dsd_bitrev)) { |
4f083917 | 1561 | fill_playback_urb_dsd_bitrev(subs, urb, bytes); |
edcd3633 | 1562 | } else { |
d24f5061 | 1563 | /* usual PCM */ |
e0570446 RW |
1564 | if (!subs->tx_length_quirk) |
1565 | copy_to_urb(subs, urb, 0, stride, bytes); | |
1566 | else | |
1567 | bytes = copy_to_urb_quirk(subs, urb, stride, bytes); | |
1568 | /* bytes is now amount of outgoing data */ | |
edcd3633 | 1569 | } |
d24f5061 | 1570 | |
fbcfbf5f | 1571 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
fbcfbf5f | 1572 | |
ea33d359 PLB |
1573 | if (subs->trigger_tstamp_pending_update) { |
1574 | /* this is the first actual URB submitted, | |
1575 | * update trigger timestamp to reflect actual start time | |
1576 | */ | |
1577 | snd_pcm_gettime(runtime, &runtime->trigger_tstamp); | |
1578 | subs->trigger_tstamp_pending_update = false; | |
1579 | } | |
1580 | ||
9c9a3b9d | 1581 | if (period_elapsed && !subs->running && subs->lowlatency_playback) { |
307cc9ba TI |
1582 | subs->period_elapsed_pending = 1; |
1583 | period_elapsed = 0; | |
1584 | } | |
d5f871f8 TI |
1585 | |
1586 | unlock: | |
edcd3633 | 1587 | spin_unlock_irqrestore(&subs->lock, flags); |
d5f871f8 TI |
1588 | if (err < 0) |
1589 | return err; | |
edcd3633 | 1590 | urb->transfer_buffer_length = bytes; |
d5f871f8 TI |
1591 | if (period_elapsed) { |
1592 | if (in_stream_lock) | |
1593 | snd_pcm_period_elapsed_under_stream_lock(subs->pcm_substream); | |
1594 | else | |
1595 | snd_pcm_period_elapsed(subs->pcm_substream); | |
1596 | } | |
1597 | return 0; | |
edcd3633 DM |
1598 | } |
1599 | ||
1600 | /* | |
1601 | * process after playback data complete | |
1602 | * - decrease the delay count again | |
1603 | */ | |
1604 | static void retire_playback_urb(struct snd_usb_substream *subs, | |
1605 | struct urb *urb) | |
1606 | { | |
1607 | unsigned long flags; | |
e8a8f09c | 1608 | struct snd_urb_ctx *ctx = urb->context; |
307cc9ba | 1609 | bool period_elapsed = false; |
1213a205 | 1610 | |
edcd3633 | 1611 | spin_lock_irqsave(&subs->lock, flags); |
e8a8f09c TI |
1612 | if (ctx->queued) { |
1613 | if (subs->inflight_bytes >= ctx->queued) | |
1614 | subs->inflight_bytes -= ctx->queued; | |
1615 | else | |
1616 | subs->inflight_bytes = 0; | |
48779a0b TI |
1617 | } |
1618 | ||
e8a8f09c | 1619 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
307cc9ba TI |
1620 | if (subs->running) { |
1621 | period_elapsed = subs->period_elapsed_pending; | |
1622 | subs->period_elapsed_pending = 0; | |
1623 | } | |
edcd3633 | 1624 | spin_unlock_irqrestore(&subs->lock, flags); |
307cc9ba TI |
1625 | if (period_elapsed) |
1626 | snd_pcm_period_elapsed(subs->pcm_substream); | |
e5779998 DM |
1627 | } |
1628 | ||
d5f871f8 TI |
1629 | /* PCM ack callback for the playback stream; |
1630 | * this plays a role only when the stream is running in low-latency mode. | |
1631 | */ | |
1632 | static int snd_usb_pcm_playback_ack(struct snd_pcm_substream *substream) | |
1633 | { | |
1634 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
1635 | struct snd_usb_endpoint *ep; | |
1636 | ||
1637 | if (!subs->lowlatency_playback || !subs->running) | |
1638 | return 0; | |
1639 | ep = subs->data_endpoint; | |
1640 | if (!ep) | |
1641 | return 0; | |
1642 | /* When no more in-flight URBs available, try to process the pending | |
1643 | * outputs here | |
1644 | */ | |
1645 | if (!ep->active_mask) | |
8c721c53 | 1646 | return snd_usb_queue_pending_output_urbs(ep, true); |
d5f871f8 TI |
1647 | return 0; |
1648 | } | |
1649 | ||
edcd3633 DM |
1650 | static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, |
1651 | int cmd) | |
1652 | { | |
1653 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
307cc9ba | 1654 | int err; |
edcd3633 DM |
1655 | |
1656 | switch (cmd) { | |
1657 | case SNDRV_PCM_TRIGGER_START: | |
ea33d359 | 1658 | subs->trigger_tstamp_pending_update = true; |
c0dbbdad | 1659 | fallthrough; |
edcd3633 | 1660 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
96e221f3 TI |
1661 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1662 | prepare_playback_urb, | |
1663 | retire_playback_urb, | |
1664 | subs); | |
9c9a3b9d | 1665 | if (subs->lowlatency_playback && |
4267c5a8 | 1666 | cmd == SNDRV_PCM_TRIGGER_START) { |
eee5d6f1 TI |
1667 | if (in_free_wheeling_mode(substream->runtime)) |
1668 | subs->lowlatency_playback = false; | |
307cc9ba TI |
1669 | err = start_endpoints(subs); |
1670 | if (err < 0) { | |
1671 | snd_usb_endpoint_set_callback(subs->data_endpoint, | |
1672 | NULL, NULL, NULL); | |
1673 | return err; | |
1674 | } | |
1675 | } | |
97f8d3b6 | 1676 | subs->running = 1; |
bf6313a0 TI |
1677 | dev_dbg(&subs->dev->dev, "%d:%d Start Playback PCM\n", |
1678 | subs->cur_audiofmt->iface, | |
1679 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1680 | return 0; |
75c16b51 | 1681 | case SNDRV_PCM_TRIGGER_SUSPEND: |
edcd3633 | 1682 | case SNDRV_PCM_TRIGGER_STOP: |
d8b4efee | 1683 | stop_endpoints(subs, substream->runtime->state == SNDRV_PCM_STATE_DRAINING); |
96e221f3 TI |
1684 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1685 | NULL, NULL, NULL); | |
97f8d3b6 | 1686 | subs->running = 0; |
bf6313a0 TI |
1687 | dev_dbg(&subs->dev->dev, "%d:%d Stop Playback PCM\n", |
1688 | subs->cur_audiofmt->iface, | |
1689 | subs->cur_audiofmt->altsetting); | |
edcd3633 DM |
1690 | return 0; |
1691 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
48779a0b | 1692 | /* keep retire_data_urb for delay calculation */ |
96e221f3 TI |
1693 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1694 | NULL, | |
1695 | retire_playback_urb, | |
1696 | subs); | |
97f8d3b6 | 1697 | subs->running = 0; |
bf6313a0 TI |
1698 | dev_dbg(&subs->dev->dev, "%d:%d Pause Playback PCM\n", |
1699 | subs->cur_audiofmt->iface, | |
1700 | subs->cur_audiofmt->altsetting); | |
edcd3633 DM |
1701 | return 0; |
1702 | } | |
1703 | ||
1704 | return -EINVAL; | |
1705 | } | |
1706 | ||
afe25967 DM |
1707 | static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, |
1708 | int cmd) | |
edcd3633 DM |
1709 | { |
1710 | int err; | |
1711 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
1712 | ||
1713 | switch (cmd) { | |
1714 | case SNDRV_PCM_TRIGGER_START: | |
1d0f9530 | 1715 | err = start_endpoints(subs); |
edcd3633 DM |
1716 | if (err < 0) |
1717 | return err; | |
96e221f3 TI |
1718 | fallthrough; |
1719 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
1720 | snd_usb_endpoint_set_callback(subs->data_endpoint, | |
1721 | NULL, retire_capture_urb, | |
1722 | subs); | |
e8a8f09c | 1723 | subs->last_frame_number = usb_get_current_frame_number(subs->dev); |
97f8d3b6 | 1724 | subs->running = 1; |
bf6313a0 TI |
1725 | dev_dbg(&subs->dev->dev, "%d:%d Start Capture PCM\n", |
1726 | subs->cur_audiofmt->iface, | |
1727 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1728 | return 0; |
75c16b51 | 1729 | case SNDRV_PCM_TRIGGER_SUSPEND: |
edcd3633 | 1730 | case SNDRV_PCM_TRIGGER_STOP: |
813a17ca | 1731 | stop_endpoints(subs, false); |
96e221f3 | 1732 | fallthrough; |
edcd3633 | 1733 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
96e221f3 TI |
1734 | snd_usb_endpoint_set_callback(subs->data_endpoint, |
1735 | NULL, NULL, NULL); | |
97f8d3b6 | 1736 | subs->running = 0; |
bf6313a0 TI |
1737 | dev_dbg(&subs->dev->dev, "%d:%d Stop Capture PCM\n", |
1738 | subs->cur_audiofmt->iface, | |
1739 | subs->cur_audiofmt->altsetting); | |
edcd3633 | 1740 | return 0; |
edcd3633 DM |
1741 | } |
1742 | ||
1743 | return -EINVAL; | |
1744 | } | |
1745 | ||
31cb1fb4 | 1746 | static const struct snd_pcm_ops snd_usb_playback_ops = { |
6fddc797 TI |
1747 | .open = snd_usb_pcm_open, |
1748 | .close = snd_usb_pcm_close, | |
e5779998 DM |
1749 | .hw_params = snd_usb_hw_params, |
1750 | .hw_free = snd_usb_hw_free, | |
1751 | .prepare = snd_usb_pcm_prepare, | |
1752 | .trigger = snd_usb_substream_playback_trigger, | |
dc5eafe7 | 1753 | .sync_stop = snd_usb_pcm_sync_stop, |
e5779998 | 1754 | .pointer = snd_usb_pcm_pointer, |
d5f871f8 | 1755 | .ack = snd_usb_pcm_playback_ack, |
e5779998 DM |
1756 | }; |
1757 | ||
31cb1fb4 | 1758 | static const struct snd_pcm_ops snd_usb_capture_ops = { |
6fddc797 TI |
1759 | .open = snd_usb_pcm_open, |
1760 | .close = snd_usb_pcm_close, | |
e5779998 DM |
1761 | .hw_params = snd_usb_hw_params, |
1762 | .hw_free = snd_usb_hw_free, | |
1763 | .prepare = snd_usb_pcm_prepare, | |
1764 | .trigger = snd_usb_substream_capture_trigger, | |
dc5eafe7 | 1765 | .sync_stop = snd_usb_pcm_sync_stop, |
e5779998 | 1766 | .pointer = snd_usb_pcm_pointer, |
f274baa4 TI |
1767 | }; |
1768 | ||
e5779998 DM |
1769 | void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) |
1770 | { | |
f274baa4 TI |
1771 | const struct snd_pcm_ops *ops; |
1772 | ||
b315997d | 1773 | ops = stream == SNDRV_PCM_STREAM_PLAYBACK ? |
f274baa4 | 1774 | &snd_usb_playback_ops : &snd_usb_capture_ops; |
f274baa4 TI |
1775 | snd_pcm_set_ops(pcm, stream, ops); |
1776 | } | |
1777 | ||
1778 | void snd_usb_preallocate_buffer(struct snd_usb_substream *subs) | |
1779 | { | |
1780 | struct snd_pcm *pcm = subs->stream->pcm; | |
1781 | struct snd_pcm_substream *s = pcm->streams[subs->direction].substream; | |
fb3c293b | 1782 | struct device *dev = subs->dev->bus->sysdev; |
f274baa4 | 1783 | |
b315997d | 1784 | if (snd_usb_use_vmalloc) |
6dd9486c TI |
1785 | snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_VMALLOC, |
1786 | NULL, 0, 0); | |
b315997d | 1787 | else |
6dd9486c TI |
1788 | snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_DEV_SG, |
1789 | dev, 64*1024, 512*1024); | |
e5779998 | 1790 | } |