1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. |
4 | * |
5 | * @File ctpcm.c |
6 | * |
7 | * @Brief |
8 | * This file contains the definition of the pcm device functions. |
9 | * |
10 | * @Author Liu Chun |
11 | * @Date Apr 2 2008 |
12 | */ |
13 | |
14 | #include "ctpcm.h" |
15 | #include "cttimer.h" |
16 | #include <linux/slab.h> |
17 | #include <sound/pcm.h> |
18 | |
19 | /* Hardware descriptions for playback */ |
20 | static const struct snd_pcm_hardware ct_pcm_playback_hw = { |
21 | .info = (SNDRV_PCM_INFO_MMAP | |
22 | SNDRV_PCM_INFO_INTERLEAVED | |
23 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
24 | SNDRV_PCM_INFO_MMAP_VALID | |
25 | SNDRV_PCM_INFO_PAUSE), |
26 | .formats = (SNDRV_PCM_FMTBIT_U8 | |
27 | SNDRV_PCM_FMTBIT_S16_LE | |
28 | SNDRV_PCM_FMTBIT_S24_3LE | |
29 | SNDRV_PCM_FMTBIT_S32_LE | |
30 | SNDRV_PCM_FMTBIT_FLOAT_LE), |
31 | .rates = (SNDRV_PCM_RATE_CONTINUOUS | |
32 | SNDRV_PCM_RATE_8000_192000), |
33 | .rate_min = 8000, |
34 | .rate_max = 192000, |
35 | .channels_min = 1, |
36 | .channels_max = 2, |
37 | .buffer_bytes_max = (128*1024), |
38 | .period_bytes_min = (64), |
39 | .period_bytes_max = (128*1024), |
40 | .periods_min = 2, |
41 | .periods_max = 1024, |
42 | .fifo_size = 0, |
43 | }; |
44 | |
45 | static const struct snd_pcm_hardware ct_spdif_passthru_playback_hw = { |
46 | .info = (SNDRV_PCM_INFO_MMAP | |
47 | SNDRV_PCM_INFO_INTERLEAVED | |
48 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
49 | SNDRV_PCM_INFO_MMAP_VALID | |
50 | SNDRV_PCM_INFO_PAUSE), |
51 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
52 | .rates = (SNDRV_PCM_RATE_48000 | |
53 | SNDRV_PCM_RATE_44100 | |
54 | SNDRV_PCM_RATE_32000), |
55 | .rate_min = 32000, |
56 | .rate_max = 48000, |
57 | .channels_min = 2, |
58 | .channels_max = 2, |
59 | .buffer_bytes_max = (128*1024), |
60 | .period_bytes_min = (64), |
61 | .period_bytes_max = (128*1024), |
62 | .periods_min = 2, |
63 | .periods_max = 1024, |
64 | .fifo_size = 0, |
65 | }; |
66 | |
67 | /* Hardware descriptions for capture */ |
68 | static const struct snd_pcm_hardware ct_pcm_capture_hw = { |
69 | .info = (SNDRV_PCM_INFO_MMAP | |
70 | SNDRV_PCM_INFO_INTERLEAVED | |
71 | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
72 | SNDRV_PCM_INFO_PAUSE | |
73 | SNDRV_PCM_INFO_MMAP_VALID), |
74 | .formats = (SNDRV_PCM_FMTBIT_U8 | |
75 | SNDRV_PCM_FMTBIT_S16_LE | |
76 | SNDRV_PCM_FMTBIT_S24_3LE | |
77 | SNDRV_PCM_FMTBIT_S32_LE | |
78 | SNDRV_PCM_FMTBIT_FLOAT_LE), |
79 | .rates = (SNDRV_PCM_RATE_CONTINUOUS | |
80 | SNDRV_PCM_RATE_8000_96000), |
81 | .rate_min = 8000, |
82 | .rate_max = 96000, |
83 | .channels_min = 1, |
84 | .channels_max = 2, |
85 | .buffer_bytes_max = (128*1024), |
86 | .period_bytes_min = (384), |
87 | .period_bytes_max = (64*1024), |
88 | .periods_min = 2, |
89 | .periods_max = 1024, |
90 | .fifo_size = 0, |
91 | }; |
92 | |
93 | static void ct_atc_pcm_interrupt(struct ct_atc_pcm *atc_pcm) |
94 | { |
95 | struct ct_atc_pcm *apcm = atc_pcm; |
96 | |
97 | if (!apcm->substream) |
98 | return; |
99 | |
100 | snd_pcm_period_elapsed(substream: apcm->substream); |
101 | } |
102 | |
103 | static void ct_atc_pcm_free_substream(struct snd_pcm_runtime *runtime) |
104 | { |
105 | struct ct_atc_pcm *apcm = runtime->private_data; |
106 | struct ct_atc *atc = snd_pcm_substream_chip(apcm->substream); |
107 | |
108 | atc->pcm_release_resources(atc, apcm); |
109 | ct_timer_instance_free(ti: apcm->timer); |
110 | kfree(objp: apcm); |
111 | runtime->private_data = NULL; |
112 | } |
113 | |
114 | /* pcm playback operations */ |
115 | static int ct_pcm_playback_open(struct snd_pcm_substream *substream) |
116 | { |
117 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
118 | struct snd_pcm_runtime *runtime = substream->runtime; |
119 | struct ct_atc_pcm *apcm; |
120 | int err; |
121 | |
122 | apcm = kzalloc(size: sizeof(*apcm), GFP_KERNEL); |
123 | if (!apcm) |
124 | return -ENOMEM; |
125 | |
126 | apcm->substream = substream; |
127 | apcm->interrupt = ct_atc_pcm_interrupt; |
128 | if (IEC958 == substream->pcm->device) { |
129 | runtime->hw = ct_spdif_passthru_playback_hw; |
130 | atc->spdif_out_passthru(atc, 1); |
131 | } else { |
132 | runtime->hw = ct_pcm_playback_hw; |
133 | if (FRONT == substream->pcm->device) |
134 | runtime->hw.channels_max = 8; |
135 | } |
136 | |
137 | err = snd_pcm_hw_constraint_integer(runtime, |
138 | SNDRV_PCM_HW_PARAM_PERIODS); |
139 | if (err < 0) |
140 | goto free_pcm; |
141 | |
142 | err = snd_pcm_hw_constraint_minmax(runtime, |
143 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, |
144 | min: 1024, UINT_MAX); |
145 | if (err < 0) |
146 | goto free_pcm; |
147 | |
148 | apcm->timer = ct_timer_instance_new(atimer: atc->timer, apcm); |
149 | if (!apcm->timer) { |
150 | err = -ENOMEM; |
151 | goto free_pcm; |
152 | } |
153 | runtime->private_data = apcm; |
154 | runtime->private_free = ct_atc_pcm_free_substream; |
155 | |
156 | return 0; |
157 | |
158 | free_pcm: |
159 | kfree(objp: apcm); |
160 | return err; |
161 | } |
162 | |
163 | static int ct_pcm_playback_close(struct snd_pcm_substream *substream) |
164 | { |
165 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
166 | |
167 | /* TODO: Notify mixer inactive. */ |
168 | if (IEC958 == substream->pcm->device) |
169 | atc->spdif_out_passthru(atc, 0); |
170 | |
171 | /* The ct_atc_pcm object will be freed by runtime->private_free */ |
172 | |
173 | return 0; |
174 | } |
175 | |
176 | static int ct_pcm_hw_params(struct snd_pcm_substream *substream, |
177 | struct snd_pcm_hw_params *hw_params) |
178 | { |
179 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
180 | struct ct_atc_pcm *apcm = substream->runtime->private_data; |
181 | |
182 | /* clear previous resources */ |
183 | atc->pcm_release_resources(atc, apcm); |
184 | return 0; |
185 | } |
186 | |
187 | static int ct_pcm_hw_free(struct snd_pcm_substream *substream) |
188 | { |
189 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
190 | struct ct_atc_pcm *apcm = substream->runtime->private_data; |
191 | |
192 | /* clear previous resources */ |
193 | atc->pcm_release_resources(atc, apcm); |
194 | return 0; |
195 | } |
196 | |
197 | |
198 | static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream) |
199 | { |
200 | int err; |
201 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
202 | struct snd_pcm_runtime *runtime = substream->runtime; |
203 | struct ct_atc_pcm *apcm = runtime->private_data; |
204 | |
205 | if (IEC958 == substream->pcm->device) |
206 | err = atc->spdif_passthru_playback_prepare(atc, apcm); |
207 | else |
208 | err = atc->pcm_playback_prepare(atc, apcm); |
209 | |
210 | if (err < 0) { |
211 | dev_err(atc->card->dev, |
212 | "Preparing pcm playback failed!!!\n" ); |
213 | return err; |
214 | } |
215 | |
216 | return 0; |
217 | } |
218 | |
219 | static int |
220 | ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) |
221 | { |
222 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
223 | struct snd_pcm_runtime *runtime = substream->runtime; |
224 | struct ct_atc_pcm *apcm = runtime->private_data; |
225 | |
226 | switch (cmd) { |
227 | case SNDRV_PCM_TRIGGER_START: |
228 | case SNDRV_PCM_TRIGGER_RESUME: |
229 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
230 | atc->pcm_playback_start(atc, apcm); |
231 | break; |
232 | case SNDRV_PCM_TRIGGER_STOP: |
233 | case SNDRV_PCM_TRIGGER_SUSPEND: |
234 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
235 | atc->pcm_playback_stop(atc, apcm); |
236 | break; |
237 | default: |
238 | break; |
239 | } |
240 | |
241 | return 0; |
242 | } |
243 | |
244 | static snd_pcm_uframes_t |
245 | ct_pcm_playback_pointer(struct snd_pcm_substream *substream) |
246 | { |
247 | unsigned long position; |
248 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
249 | struct snd_pcm_runtime *runtime = substream->runtime; |
250 | struct ct_atc_pcm *apcm = runtime->private_data; |
251 | |
252 | /* Read out playback position */ |
253 | position = atc->pcm_playback_position(atc, apcm); |
254 | position = bytes_to_frames(runtime, size: position); |
255 | if (position >= runtime->buffer_size) |
256 | position = 0; |
257 | return position; |
258 | } |
259 | |
260 | /* pcm capture operations */ |
261 | static int ct_pcm_capture_open(struct snd_pcm_substream *substream) |
262 | { |
263 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
264 | struct snd_pcm_runtime *runtime = substream->runtime; |
265 | struct ct_atc_pcm *apcm; |
266 | int err; |
267 | |
268 | apcm = kzalloc(size: sizeof(*apcm), GFP_KERNEL); |
269 | if (!apcm) |
270 | return -ENOMEM; |
271 | |
272 | apcm->started = 0; |
273 | apcm->substream = substream; |
274 | apcm->interrupt = ct_atc_pcm_interrupt; |
275 | runtime->hw = ct_pcm_capture_hw; |
276 | runtime->hw.rate_max = atc->rsr * atc->msr; |
277 | |
278 | err = snd_pcm_hw_constraint_integer(runtime, |
279 | SNDRV_PCM_HW_PARAM_PERIODS); |
280 | if (err < 0) |
281 | goto free_pcm; |
282 | |
283 | err = snd_pcm_hw_constraint_minmax(runtime, |
284 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, |
285 | min: 1024, UINT_MAX); |
286 | if (err < 0) |
287 | goto free_pcm; |
288 | |
289 | apcm->timer = ct_timer_instance_new(atimer: atc->timer, apcm); |
290 | if (!apcm->timer) { |
291 | err = -ENOMEM; |
292 | goto free_pcm; |
293 | } |
294 | runtime->private_data = apcm; |
295 | runtime->private_free = ct_atc_pcm_free_substream; |
296 | |
297 | return 0; |
298 | |
299 | free_pcm: |
300 | kfree(objp: apcm); |
301 | return err; |
302 | } |
303 | |
304 | static int ct_pcm_capture_close(struct snd_pcm_substream *substream) |
305 | { |
306 | /* The ct_atc_pcm object will be freed by runtime->private_free */ |
307 | /* TODO: Notify mixer inactive. */ |
308 | return 0; |
309 | } |
310 | |
311 | static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream) |
312 | { |
313 | int err; |
314 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
315 | struct snd_pcm_runtime *runtime = substream->runtime; |
316 | struct ct_atc_pcm *apcm = runtime->private_data; |
317 | |
318 | err = atc->pcm_capture_prepare(atc, apcm); |
319 | if (err < 0) { |
320 | dev_err(atc->card->dev, |
321 | "Preparing pcm capture failed!!!\n" ); |
322 | return err; |
323 | } |
324 | |
325 | return 0; |
326 | } |
327 | |
328 | static int |
329 | ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) |
330 | { |
331 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
332 | struct snd_pcm_runtime *runtime = substream->runtime; |
333 | struct ct_atc_pcm *apcm = runtime->private_data; |
334 | |
335 | switch (cmd) { |
336 | case SNDRV_PCM_TRIGGER_START: |
337 | atc->pcm_capture_start(atc, apcm); |
338 | break; |
339 | case SNDRV_PCM_TRIGGER_STOP: |
340 | atc->pcm_capture_stop(atc, apcm); |
341 | break; |
342 | default: |
343 | atc->pcm_capture_stop(atc, apcm); |
344 | break; |
345 | } |
346 | |
347 | return 0; |
348 | } |
349 | |
350 | static snd_pcm_uframes_t |
351 | ct_pcm_capture_pointer(struct snd_pcm_substream *substream) |
352 | { |
353 | unsigned long position; |
354 | struct ct_atc *atc = snd_pcm_substream_chip(substream); |
355 | struct snd_pcm_runtime *runtime = substream->runtime; |
356 | struct ct_atc_pcm *apcm = runtime->private_data; |
357 | |
358 | /* Read out playback position */ |
359 | position = atc->pcm_capture_position(atc, apcm); |
360 | position = bytes_to_frames(runtime, size: position); |
361 | if (position >= runtime->buffer_size) |
362 | position = 0; |
363 | return position; |
364 | } |
365 | |
366 | /* PCM operators for playback */ |
367 | static const struct snd_pcm_ops ct_pcm_playback_ops = { |
368 | .open = ct_pcm_playback_open, |
369 | .close = ct_pcm_playback_close, |
370 | .hw_params = ct_pcm_hw_params, |
371 | .hw_free = ct_pcm_hw_free, |
372 | .prepare = ct_pcm_playback_prepare, |
373 | .trigger = ct_pcm_playback_trigger, |
374 | .pointer = ct_pcm_playback_pointer, |
375 | }; |
376 | |
377 | /* PCM operators for capture */ |
378 | static const struct snd_pcm_ops ct_pcm_capture_ops = { |
379 | .open = ct_pcm_capture_open, |
380 | .close = ct_pcm_capture_close, |
381 | .hw_params = ct_pcm_hw_params, |
382 | .hw_free = ct_pcm_hw_free, |
383 | .prepare = ct_pcm_capture_prepare, |
384 | .trigger = ct_pcm_capture_trigger, |
385 | .pointer = ct_pcm_capture_pointer, |
386 | }; |
387 | |
388 | static const struct snd_pcm_chmap_elem surround_map[] = { |
389 | { .channels = 1, |
390 | .map = { SNDRV_CHMAP_MONO } }, |
391 | { .channels = 2, |
392 | .map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, |
393 | { } |
394 | }; |
395 | |
396 | static const struct snd_pcm_chmap_elem clfe_map[] = { |
397 | { .channels = 1, |
398 | .map = { SNDRV_CHMAP_MONO } }, |
399 | { .channels = 2, |
400 | .map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, |
401 | { } |
402 | }; |
403 | |
404 | static const struct snd_pcm_chmap_elem side_map[] = { |
405 | { .channels = 1, |
406 | .map = { SNDRV_CHMAP_MONO } }, |
407 | { .channels = 2, |
408 | .map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, |
409 | { } |
410 | }; |
411 | |
412 | /* Create ALSA pcm device */ |
413 | int ct_alsa_pcm_create(struct ct_atc *atc, |
414 | enum CTALSADEVS device, |
415 | const char *device_name) |
416 | { |
417 | struct snd_pcm *pcm; |
418 | const struct snd_pcm_chmap_elem *map; |
419 | int chs; |
420 | int err; |
421 | int playback_count, capture_count; |
422 | |
423 | playback_count = (IEC958 == device) ? 1 : 256; |
424 | capture_count = (FRONT == device) ? 1 : 0; |
425 | err = snd_pcm_new(card: atc->card, id: "ctxfi" , device, |
426 | playback_count, capture_count, rpcm: &pcm); |
427 | if (err < 0) { |
428 | dev_err(atc->card->dev, "snd_pcm_new failed!! Err=%d\n" , |
429 | err); |
430 | return err; |
431 | } |
432 | |
433 | pcm->private_data = atc; |
434 | pcm->info_flags = 0; |
435 | pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX; |
436 | strscpy(pcm->name, device_name, sizeof(pcm->name)); |
437 | |
438 | snd_pcm_set_ops(pcm, direction: SNDRV_PCM_STREAM_PLAYBACK, ops: &ct_pcm_playback_ops); |
439 | |
440 | if (FRONT == device) |
441 | snd_pcm_set_ops(pcm, |
442 | direction: SNDRV_PCM_STREAM_CAPTURE, ops: &ct_pcm_capture_ops); |
443 | |
444 | snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG, |
445 | data: &atc->pci->dev, size: 128*1024, max: 128*1024); |
446 | |
447 | chs = 2; |
448 | switch (device) { |
449 | case FRONT: |
450 | chs = 8; |
451 | map = snd_pcm_std_chmaps; |
452 | break; |
453 | case SURROUND: |
454 | map = surround_map; |
455 | break; |
456 | case CLFE: |
457 | map = clfe_map; |
458 | break; |
459 | case SIDE: |
460 | map = side_map; |
461 | break; |
462 | default: |
463 | map = snd_pcm_std_chmaps; |
464 | break; |
465 | } |
466 | err = snd_pcm_add_chmap_ctls(pcm, stream: SNDRV_PCM_STREAM_PLAYBACK, chmap: map, max_channels: chs, |
467 | private_value: 0, NULL); |
468 | if (err < 0) |
469 | return err; |
470 | |
471 | #ifdef CONFIG_PM_SLEEP |
472 | atc->pcms[device] = pcm; |
473 | #endif |
474 | |
475 | return 0; |
476 | } |
477 | |