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TOMOYO Linux Cross Reference
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         int err;
182 
183         err = snd_pcm_lib_malloc_pages(substream,
184                                         params_buffer_bytes(hw_params));
185         if (err < 0)
186                 return err;
187         /* clear previous resources */
188         atc->pcm_release_resources(atc, apcm);
189         return err;
190 }
191 
192 static int ct_pcm_hw_free(struct snd_pcm_substream *substream)
193 {
194         struct ct_atc *atc = snd_pcm_substream_chip(substream);
195         struct ct_atc_pcm *apcm = substream->runtime->private_data;
196 
197         /* clear previous resources */
198         atc->pcm_release_resources(atc, apcm);
199         /* Free snd-allocated pages */
200         return snd_pcm_lib_free_pages(substream);
201 }
202 
203 
204 static int ct_pcm_playback_prepare(struct snd_pcm_substream *substream)
205 {
206         int err;
207         struct ct_atc *atc = snd_pcm_substream_chip(substream);
208         struct snd_pcm_runtime *runtime = substream->runtime;
209         struct ct_atc_pcm *apcm = runtime->private_data;
210 
211         if (IEC958 == substream->pcm->device)
212                 err = atc->spdif_passthru_playback_prepare(atc, apcm);
213         else
214                 err = atc->pcm_playback_prepare(atc, apcm);
215 
216         if (err < 0) {
217                 dev_err(atc->card->dev,
218                         "Preparing pcm playback failed!!!\n");
219                 return err;
220         }
221 
222         return 0;
223 }
224 
225 static int
226 ct_pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
227 {
228         struct ct_atc *atc = snd_pcm_substream_chip(substream);
229         struct snd_pcm_runtime *runtime = substream->runtime;
230         struct ct_atc_pcm *apcm = runtime->private_data;
231 
232         switch (cmd) {
233         case SNDRV_PCM_TRIGGER_START:
234         case SNDRV_PCM_TRIGGER_RESUME:
235         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
236                 atc->pcm_playback_start(atc, apcm);
237                 break;
238         case SNDRV_PCM_TRIGGER_STOP:
239         case SNDRV_PCM_TRIGGER_SUSPEND:
240         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
241                 atc->pcm_playback_stop(atc, apcm);
242                 break;
243         default:
244                 break;
245         }
246 
247         return 0;
248 }
249 
250 static snd_pcm_uframes_t
251 ct_pcm_playback_pointer(struct snd_pcm_substream *substream)
252 {
253         unsigned long position;
254         struct ct_atc *atc = snd_pcm_substream_chip(substream);
255         struct snd_pcm_runtime *runtime = substream->runtime;
256         struct ct_atc_pcm *apcm = runtime->private_data;
257 
258         /* Read out playback position */
259         position = atc->pcm_playback_position(atc, apcm);
260         position = bytes_to_frames(runtime, position);
261         if (position >= runtime->buffer_size)
262                 position = 0;
263         return position;
264 }
265 
266 /* pcm capture operations */
267 static int ct_pcm_capture_open(struct snd_pcm_substream *substream)
268 {
269         struct ct_atc *atc = snd_pcm_substream_chip(substream);
270         struct snd_pcm_runtime *runtime = substream->runtime;
271         struct ct_atc_pcm *apcm;
272         int err;
273 
274         apcm = kzalloc(sizeof(*apcm), GFP_KERNEL);
275         if (!apcm)
276                 return -ENOMEM;
277 
278         apcm->started = 0;
279         apcm->substream = substream;
280         apcm->interrupt = ct_atc_pcm_interrupt;
281         runtime->hw = ct_pcm_capture_hw;
282         runtime->hw.rate_max = atc->rsr * atc->msr;
283 
284         err = snd_pcm_hw_constraint_integer(runtime,
285                                             SNDRV_PCM_HW_PARAM_PERIODS);
286         if (err < 0)
287                 goto free_pcm;
288 
289         err = snd_pcm_hw_constraint_minmax(runtime,
290                                            SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
291                                            1024, UINT_MAX);
292         if (err < 0)
293                 goto free_pcm;
294 
295         apcm->timer = ct_timer_instance_new(atc->timer, apcm);
296         if (!apcm->timer) {
297                 err = -ENOMEM;
298                 goto free_pcm;
299         }
300         runtime->private_data = apcm;
301         runtime->private_free = ct_atc_pcm_free_substream;
302 
303         return 0;
304 
305 free_pcm:
306         kfree(apcm);
307         return err;
308 }
309 
310 static int ct_pcm_capture_close(struct snd_pcm_substream *substream)
311 {
312         /* The ct_atc_pcm object will be freed by runtime->private_free */
313         /* TODO: Notify mixer inactive. */
314         return 0;
315 }
316 
317 static int ct_pcm_capture_prepare(struct snd_pcm_substream *substream)
318 {
319         int err;
320         struct ct_atc *atc = snd_pcm_substream_chip(substream);
321         struct snd_pcm_runtime *runtime = substream->runtime;
322         struct ct_atc_pcm *apcm = runtime->private_data;
323 
324         err = atc->pcm_capture_prepare(atc, apcm);
325         if (err < 0) {
326                 dev_err(atc->card->dev,
327                         "Preparing pcm capture failed!!!\n");
328                 return err;
329         }
330 
331         return 0;
332 }
333 
334 static int
335 ct_pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
336 {
337         struct ct_atc *atc = snd_pcm_substream_chip(substream);
338         struct snd_pcm_runtime *runtime = substream->runtime;
339         struct ct_atc_pcm *apcm = runtime->private_data;
340 
341         switch (cmd) {
342         case SNDRV_PCM_TRIGGER_START:
343                 atc->pcm_capture_start(atc, apcm);
344                 break;
345         case SNDRV_PCM_TRIGGER_STOP:
346                 atc->pcm_capture_stop(atc, apcm);
347                 break;
348         default:
349                 atc->pcm_capture_stop(atc, apcm);
350                 break;
351         }
352 
353         return 0;
354 }
355 
356 static snd_pcm_uframes_t
357 ct_pcm_capture_pointer(struct snd_pcm_substream *substream)
358 {
359         unsigned long position;
360         struct ct_atc *atc = snd_pcm_substream_chip(substream);
361         struct snd_pcm_runtime *runtime = substream->runtime;
362         struct ct_atc_pcm *apcm = runtime->private_data;
363 
364         /* Read out playback position */
365         position = atc->pcm_capture_position(atc, apcm);
366         position = bytes_to_frames(runtime, position);
367         if (position >= runtime->buffer_size)
368                 position = 0;
369         return position;
370 }
371 
372 /* PCM operators for playback */
373 static const struct snd_pcm_ops ct_pcm_playback_ops = {
374         .open           = ct_pcm_playback_open,
375         .close          = ct_pcm_playback_close,
376         .ioctl          = snd_pcm_lib_ioctl,
377         .hw_params      = ct_pcm_hw_params,
378         .hw_free        = ct_pcm_hw_free,
379         .prepare        = ct_pcm_playback_prepare,
380         .trigger        = ct_pcm_playback_trigger,
381         .pointer        = ct_pcm_playback_pointer,
382         .page           = snd_pcm_sgbuf_ops_page,
383 };
384 
385 /* PCM operators for capture */
386 static const struct snd_pcm_ops ct_pcm_capture_ops = {
387         .open           = ct_pcm_capture_open,
388         .close          = ct_pcm_capture_close,
389         .ioctl          = snd_pcm_lib_ioctl,
390         .hw_params      = ct_pcm_hw_params,
391         .hw_free        = ct_pcm_hw_free,
392         .prepare        = ct_pcm_capture_prepare,
393         .trigger        = ct_pcm_capture_trigger,
394         .pointer        = ct_pcm_capture_pointer,
395         .page           = snd_pcm_sgbuf_ops_page,
396 };
397 
398 static const struct snd_pcm_chmap_elem surround_map[] = {
399         { .channels = 1,
400           .map = { SNDRV_CHMAP_MONO } },
401         { .channels = 2,
402           .map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
403         { }
404 };
405 
406 static const struct snd_pcm_chmap_elem clfe_map[] = {
407         { .channels = 1,
408           .map = { SNDRV_CHMAP_MONO } },
409         { .channels = 2,
410           .map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
411         { }
412 };
413 
414 static const struct snd_pcm_chmap_elem side_map[] = {
415         { .channels = 1,
416           .map = { SNDRV_CHMAP_MONO } },
417         { .channels = 2,
418           .map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
419         { }
420 };
421 
422 /* Create ALSA pcm device */
423 int ct_alsa_pcm_create(struct ct_atc *atc,
424                        enum CTALSADEVS device,
425                        const char *device_name)
426 {
427         struct snd_pcm *pcm;
428         const struct snd_pcm_chmap_elem *map;
429         int chs;
430         int err;
431         int playback_count, capture_count;
432 
433         playback_count = (IEC958 == device) ? 1 : 256;
434         capture_count = (FRONT == device) ? 1 : 0;
435         err = snd_pcm_new(atc->card, "ctxfi", device,
436                           playback_count, capture_count, &pcm);
437         if (err < 0) {
438                 dev_err(atc->card->dev, "snd_pcm_new failed!! Err=%d\n",
439                         err);
440                 return err;
441         }
442 
443         pcm->private_data = atc;
444         pcm->info_flags = 0;
445         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
446         strlcpy(pcm->name, device_name, sizeof(pcm->name));
447 
448         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ct_pcm_playback_ops);
449 
450         if (FRONT == device)
451                 snd_pcm_set_ops(pcm,
452                                 SNDRV_PCM_STREAM_CAPTURE, &ct_pcm_capture_ops);
453 
454         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
455                         snd_dma_pci_data(atc->pci), 128*1024, 128*1024);
456 
457         chs = 2;
458         switch (device) {
459         case FRONT:
460                 chs = 8;
461                 map = snd_pcm_std_chmaps;
462                 break;
463         case SURROUND:
464                 map = surround_map;
465                 break;
466         case CLFE:
467                 map = clfe_map;
468                 break;
469         case SIDE:
470                 map = side_map;
471                 break;
472         default:
473                 map = snd_pcm_std_chmaps;
474                 break;
475         }
476         err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, chs,
477                                      0, NULL);
478         if (err < 0)
479                 return err;
480 
481 #ifdef CONFIG_PM_SLEEP
482         atc->pcms[device] = pcm;
483 #endif
484 
485         return 0;
486 }
487 

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