1 // SPDX-License-Identifier: GPL-2.0-only
3 * Intel Baytrail SST PCM Support
4 * Copyright (c) 2014, Intel Corporation.
7 #include <linux/module.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/slab.h>
10 #include <sound/core.h>
11 #include <sound/pcm.h>
12 #include <sound/pcm_params.h>
13 #include <sound/soc.h>
14 #include "sst-baytrail-ipc.h"
15 #include "../common/sst-dsp-priv.h"
16 #include "../common/sst-dsp.h"
18 #define DRV_NAME "byt-dai"
19 #define BYT_PCM_COUNT 2
21 static const struct snd_pcm_hardware sst_byt_pcm_hardware = {
22 .info = SNDRV_PCM_INFO_MMAP |
23 SNDRV_PCM_INFO_MMAP_VALID |
24 SNDRV_PCM_INFO_INTERLEAVED |
25 SNDRV_PCM_INFO_PAUSE |
26 SNDRV_PCM_INFO_RESUME,
27 .formats = SNDRV_PCM_FMTBIT_S16_LE |
28 SNDRV_PCM_FMTBIT_S24_LE,
29 .period_bytes_min = 384,
30 .period_bytes_max = 48000,
33 .buffer_bytes_max = 96000,
36 /* private data for each PCM DSP stream */
37 struct sst_byt_pcm_data {
38 struct sst_byt_stream *stream;
39 struct snd_pcm_substream *substream;
42 /* latest DSP DMA hw pointer */
45 struct work_struct work;
48 /* private data for the driver */
49 struct sst_byt_priv_data {
54 struct sst_byt_pcm_data pcm[BYT_PCM_COUNT];
56 /* flag indicating is stream context restore needed after suspend */
60 /* this may get called several times by oss emulation */
61 static int sst_byt_pcm_hw_params(struct snd_pcm_substream *substream,
62 struct snd_pcm_hw_params *params)
64 struct snd_soc_pcm_runtime *rtd = substream->private_data;
65 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
66 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
67 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
68 struct sst_byt *byt = pdata->byt;
71 int ret, playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
73 dev_dbg(rtd->dev, "PCM: hw_params, pcm_data %p\n", pcm_data);
75 ret = sst_byt_stream_type(byt, pcm_data->stream,
78 dev_err(rtd->dev, "failed to set stream format %d\n", ret);
82 rate = params_rate(params);
83 ret = sst_byt_stream_set_rate(byt, pcm_data->stream, rate);
85 dev_err(rtd->dev, "could not set rate %d\n", rate);
89 bits = snd_pcm_format_width(params_format(params));
90 ret = sst_byt_stream_set_bits(byt, pcm_data->stream, bits);
92 dev_err(rtd->dev, "could not set formats %d\n",
97 channels = (u8)(params_channels(params) & 0xF);
98 ret = sst_byt_stream_set_channels(byt, pcm_data->stream, channels);
100 dev_err(rtd->dev, "could not set channels %d\n",
101 params_rate(params));
105 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
107 ret = sst_byt_stream_buffer(byt, pcm_data->stream,
108 substream->dma_buffer.addr,
109 params_buffer_bytes(params));
111 dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret);
115 ret = sst_byt_stream_commit(byt, pcm_data->stream);
117 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
124 static int sst_byt_pcm_hw_free(struct snd_pcm_substream *substream)
126 struct snd_soc_pcm_runtime *rtd = substream->private_data;
128 dev_dbg(rtd->dev, "PCM: hw_free\n");
129 snd_pcm_lib_free_pages(substream);
134 static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream)
136 struct snd_soc_pcm_runtime *rtd = substream->private_data;
137 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
138 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
139 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
140 struct sst_byt *byt = pdata->byt;
143 /* commit stream using existing stream params */
144 ret = sst_byt_stream_commit(byt, pcm_data->stream);
146 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
150 sst_byt_stream_start(byt, pcm_data->stream, pcm_data->hw_ptr);
152 dev_dbg(rtd->dev, "stream context restored at offset %d\n",
158 static void sst_byt_pcm_work(struct work_struct *work)
160 struct sst_byt_pcm_data *pcm_data =
161 container_of(work, struct sst_byt_pcm_data, work);
163 if (snd_pcm_running(pcm_data->substream))
164 sst_byt_pcm_restore_stream_context(pcm_data->substream);
167 static int sst_byt_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
169 struct snd_soc_pcm_runtime *rtd = substream->private_data;
170 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
171 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
172 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
173 struct sst_byt *byt = pdata->byt;
175 dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd);
178 case SNDRV_PCM_TRIGGER_START:
179 pcm_data->hw_ptr = 0;
180 sst_byt_stream_start(byt, pcm_data->stream, 0);
182 case SNDRV_PCM_TRIGGER_RESUME:
183 if (pdata->restore_stream)
184 schedule_work(&pcm_data->work);
186 sst_byt_stream_resume(byt, pcm_data->stream);
188 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
189 sst_byt_stream_resume(byt, pcm_data->stream);
191 case SNDRV_PCM_TRIGGER_STOP:
192 sst_byt_stream_stop(byt, pcm_data->stream);
194 case SNDRV_PCM_TRIGGER_SUSPEND:
195 pdata->restore_stream = false;
196 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
197 sst_byt_stream_pause(byt, pcm_data->stream);
206 static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data)
208 struct sst_byt_pcm_data *pcm_data = data;
209 struct snd_pcm_substream *substream = pcm_data->substream;
210 struct snd_pcm_runtime *runtime = substream->runtime;
211 struct snd_soc_pcm_runtime *rtd = substream->private_data;
212 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
213 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
214 struct sst_byt *byt = pdata->byt;
217 hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
218 snd_pcm_lib_buffer_bytes(substream));
219 pcm_data->hw_ptr = hw_pos;
220 pos = frames_to_bytes(runtime,
221 (runtime->control->appl_ptr %
222 runtime->buffer_size));
224 dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos);
226 snd_pcm_period_elapsed(substream);
230 static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream)
232 struct snd_soc_pcm_runtime *rtd = substream->private_data;
233 struct snd_pcm_runtime *runtime = substream->runtime;
234 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
235 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
236 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
238 dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr);
240 return bytes_to_frames(runtime, pcm_data->hw_ptr);
243 static int sst_byt_pcm_open(struct snd_pcm_substream *substream)
245 struct snd_soc_pcm_runtime *rtd = substream->private_data;
246 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
247 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
248 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
249 struct sst_byt *byt = pdata->byt;
251 dev_dbg(rtd->dev, "PCM: open\n");
253 mutex_lock(&pcm_data->mutex);
255 pcm_data->substream = substream;
257 snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware);
259 pcm_data->stream = sst_byt_stream_new(byt, substream->stream + 1,
260 byt_notify_pointer, pcm_data);
261 if (pcm_data->stream == NULL) {
262 dev_err(rtd->dev, "failed to create stream\n");
263 mutex_unlock(&pcm_data->mutex);
267 mutex_unlock(&pcm_data->mutex);
271 static int sst_byt_pcm_close(struct snd_pcm_substream *substream)
273 struct snd_soc_pcm_runtime *rtd = substream->private_data;
274 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
275 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
276 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
277 struct sst_byt *byt = pdata->byt;
280 dev_dbg(rtd->dev, "PCM: close\n");
282 cancel_work_sync(&pcm_data->work);
283 mutex_lock(&pcm_data->mutex);
284 ret = sst_byt_stream_free(byt, pcm_data->stream);
286 dev_dbg(rtd->dev, "Free stream fail\n");
289 pcm_data->stream = NULL;
292 mutex_unlock(&pcm_data->mutex);
296 static int sst_byt_pcm_mmap(struct snd_pcm_substream *substream,
297 struct vm_area_struct *vma)
299 struct snd_soc_pcm_runtime *rtd = substream->private_data;
301 dev_dbg(rtd->dev, "PCM: mmap\n");
302 return snd_pcm_lib_default_mmap(substream, vma);
305 static const struct snd_pcm_ops sst_byt_pcm_ops = {
306 .open = sst_byt_pcm_open,
307 .close = sst_byt_pcm_close,
308 .ioctl = snd_pcm_lib_ioctl,
309 .hw_params = sst_byt_pcm_hw_params,
310 .hw_free = sst_byt_pcm_hw_free,
311 .trigger = sst_byt_pcm_trigger,
312 .pointer = sst_byt_pcm_pointer,
313 .mmap = sst_byt_pcm_mmap,
316 static int sst_byt_pcm_new(struct snd_soc_pcm_runtime *rtd)
318 struct snd_pcm *pcm = rtd->pcm;
320 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
321 struct sst_pdata *pdata = dev_get_platdata(component->dev);
323 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
324 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
325 size = sst_byt_pcm_hardware.buffer_bytes_max;
326 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
334 static struct snd_soc_dai_driver byt_dais[] = {
336 .name = "Baytrail PCM",
338 .stream_name = "System Playback",
341 .rates = SNDRV_PCM_RATE_48000,
342 .formats = SNDRV_PCM_FMTBIT_S24_3LE |
343 SNDRV_PCM_FMTBIT_S16_LE,
346 .stream_name = "Analog Capture",
349 .rates = SNDRV_PCM_RATE_48000,
350 .formats = SNDRV_PCM_FMTBIT_S16_LE,
355 static int sst_byt_pcm_probe(struct snd_soc_component *component)
357 struct sst_pdata *plat_data = dev_get_platdata(component->dev);
358 struct sst_byt_priv_data *priv_data;
364 priv_data = devm_kzalloc(component->dev, sizeof(*priv_data),
368 priv_data->byt = plat_data->dsp;
369 snd_soc_component_set_drvdata(component, priv_data);
371 for (i = 0; i < BYT_PCM_COUNT; i++) {
372 mutex_init(&priv_data->pcm[i].mutex);
373 INIT_WORK(&priv_data->pcm[i].work, sst_byt_pcm_work);
379 static const struct snd_soc_component_driver byt_dai_component = {
381 .probe = sst_byt_pcm_probe,
382 .ops = &sst_byt_pcm_ops,
383 .pcm_new = sst_byt_pcm_new,
387 static int sst_byt_pcm_dev_suspend_late(struct device *dev)
389 struct sst_pdata *sst_pdata = dev_get_platdata(dev);
390 struct sst_byt_priv_data *priv_data = dev_get_drvdata(dev);
393 dev_dbg(dev, "suspending late\n");
395 ret = sst_byt_dsp_suspend_late(dev, sst_pdata);
397 dev_err(dev, "failed to suspend %d\n", ret);
401 priv_data->restore_stream = true;
406 static int sst_byt_pcm_dev_resume_early(struct device *dev)
408 struct sst_pdata *sst_pdata = dev_get_platdata(dev);
411 dev_dbg(dev, "resume early\n");
413 /* load fw and boot DSP */
414 ret = sst_byt_dsp_boot(dev, sst_pdata);
418 /* wait for FW to finish booting */
419 return sst_byt_dsp_wait_for_ready(dev, sst_pdata);
422 static const struct dev_pm_ops sst_byt_pm_ops = {
423 .suspend_late = sst_byt_pcm_dev_suspend_late,
424 .resume_early = sst_byt_pcm_dev_resume_early,
427 #define SST_BYT_PM_OPS (&sst_byt_pm_ops)
429 #define SST_BYT_PM_OPS NULL
432 static int sst_byt_pcm_dev_probe(struct platform_device *pdev)
434 struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
437 ret = sst_byt_dsp_init(&pdev->dev, sst_pdata);
441 ret = devm_snd_soc_register_component(&pdev->dev, &byt_dai_component,
442 byt_dais, ARRAY_SIZE(byt_dais));
449 sst_byt_dsp_free(&pdev->dev, sst_pdata);
453 static int sst_byt_pcm_dev_remove(struct platform_device *pdev)
455 struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
457 sst_byt_dsp_free(&pdev->dev, sst_pdata);
462 static struct platform_driver sst_byt_pcm_driver = {
464 .name = "baytrail-pcm-audio",
465 .pm = SST_BYT_PM_OPS,
468 .probe = sst_byt_pcm_dev_probe,
469 .remove = sst_byt_pcm_dev_remove,
471 module_platform_driver(sst_byt_pcm_driver);
473 MODULE_AUTHOR("Jarkko Nikula");
474 MODULE_DESCRIPTION("Baytrail PCM");
475 MODULE_LICENSE("GPL v2");
476 MODULE_ALIAS("platform:baytrail-pcm-audio");