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(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(apcm->timer);
110 kfree(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(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 1024, UINT_MAX);
145 if (err < 0)
146 goto free_pcm;
147
148 apcm->timer = ct_timer_instance_new(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(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, 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(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 1024, UINT_MAX);
286 if (err < 0)
287 goto free_pcm;
288
289 apcm->timer = ct_timer_instance_new(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(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, 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(atc->card, "ctxfi", device,
426 playback_count, capture_count, &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, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);
439
440 if (FRONT == device)
441 snd_pcm_set_ops(pcm,
442 SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
443
444 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
445 &atc->pci->dev, 128*1024, 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, SNDRV_PCM_STREAM_PLAYBACK, map, chs,
467 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
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