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Linux/sound/pci/ctxfi/ctpcm.c

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  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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