2 * sst_mfld_platform.c - Intel MID Platform driver
4 * Copyright (C) 2010-2013 Intel Corp
5 * Author: Vinod Koul <vinod.koul@intel.com>
6 * Author: Harsha Priya <priya.harsha@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22 #include <linux/slab.h>
24 #include <linux/module.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/pcm_params.h>
28 #include <sound/soc.h>
29 #include <sound/compress_driver.h>
30 #include "sst-mfld-platform.h"
32 struct sst_device *sst;
33 static DEFINE_MUTEX(sst_lock);
34 extern struct snd_compr_ops sst_platform_compr_ops;
36 int sst_register_dsp(struct sst_device *dev)
40 if (!try_module_get(dev->dev->driver->owner))
42 mutex_lock(&sst_lock);
44 pr_err("we already have a device %s\n", sst->name);
45 module_put(dev->dev->driver->owner);
46 mutex_unlock(&sst_lock);
49 pr_debug("registering device %s\n", dev->name);
51 mutex_unlock(&sst_lock);
54 EXPORT_SYMBOL_GPL(sst_register_dsp);
56 int sst_unregister_dsp(struct sst_device *dev)
63 mutex_lock(&sst_lock);
66 mutex_unlock(&sst_lock);
70 module_put(sst->dev->driver->owner);
71 pr_debug("unreg %s\n", sst->name);
73 mutex_unlock(&sst_lock);
76 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
78 static struct snd_pcm_hardware sst_platform_pcm_hw = {
79 .info = (SNDRV_PCM_INFO_INTERLEAVED |
80 SNDRV_PCM_INFO_DOUBLE |
81 SNDRV_PCM_INFO_PAUSE |
82 SNDRV_PCM_INFO_RESUME |
84 SNDRV_PCM_INFO_MMAP_VALID |
85 SNDRV_PCM_INFO_BLOCK_TRANSFER |
86 SNDRV_PCM_INFO_SYNC_START),
87 .buffer_bytes_max = SST_MAX_BUFFER,
88 .period_bytes_min = SST_MIN_PERIOD_BYTES,
89 .period_bytes_max = SST_MAX_PERIOD_BYTES,
90 .periods_min = SST_MIN_PERIODS,
91 .periods_max = SST_MAX_PERIODS,
92 .fifo_size = SST_FIFO_SIZE,
96 static struct snd_soc_dai_driver sst_platform_dai[] = {
98 .name = "Headset-cpu-dai",
101 .channels_min = SST_STEREO,
102 .channels_max = SST_STEREO,
103 .rates = SNDRV_PCM_RATE_48000,
104 .formats = SNDRV_PCM_FMTBIT_S24_LE,
109 .rates = SNDRV_PCM_RATE_48000,
110 .formats = SNDRV_PCM_FMTBIT_S24_LE,
114 .name = "Compress-cpu-dai",
117 .channels_min = SST_STEREO,
118 .channels_max = SST_STEREO,
119 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
120 .formats = SNDRV_PCM_FMTBIT_S16_LE,
125 /* helper functions */
126 void sst_set_stream_status(struct sst_runtime_stream *stream,
130 spin_lock_irqsave(&stream->status_lock, flags);
131 stream->stream_status = state;
132 spin_unlock_irqrestore(&stream->status_lock, flags);
135 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
140 spin_lock_irqsave(&stream->status_lock, flags);
141 state = stream->stream_status;
142 spin_unlock_irqrestore(&stream->status_lock, flags);
146 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
147 struct sst_pcm_params *param)
150 param->num_chan = (u8) substream->runtime->channels;
151 param->pcm_wd_sz = substream->runtime->sample_bits;
153 param->sfreq = substream->runtime->rate;
154 param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
155 param->period_count = substream->runtime->period_size;
156 param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
157 pr_debug("period_cnt = %d\n", param->period_count);
158 pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
161 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
163 struct sst_runtime_stream *stream =
164 substream->runtime->private_data;
165 struct sst_pcm_params param = {0};
166 struct sst_stream_params str_params = {0};
169 /* set codec params and inform SST driver the same */
170 sst_fill_pcm_params(substream, ¶m);
171 substream->runtime->dma_area = substream->dma_buffer.area;
172 str_params.sparams = param;
173 str_params.codec = param.codec;
174 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
175 str_params.ops = STREAM_OPS_PLAYBACK;
176 str_params.device_type = substream->pcm->device + 1;
177 pr_debug("Playbck stream,Device %d\n",
178 substream->pcm->device);
180 str_params.ops = STREAM_OPS_CAPTURE;
181 str_params.device_type = SND_SST_DEVICE_CAPTURE;
182 pr_debug("Capture stream,Device %d\n",
183 substream->pcm->device);
185 ret_val = stream->ops->open(&str_params);
186 pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
190 stream->stream_info.str_id = ret_val;
191 pr_debug("str id : %d\n", stream->stream_info.str_id);
195 static void sst_period_elapsed(void *mad_substream)
197 struct snd_pcm_substream *substream = mad_substream;
198 struct sst_runtime_stream *stream;
201 if (!substream || !substream->runtime)
203 stream = substream->runtime->private_data;
206 status = sst_get_stream_status(stream);
207 if (status != SST_PLATFORM_RUNNING)
209 snd_pcm_period_elapsed(substream);
212 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
214 struct sst_runtime_stream *stream =
215 substream->runtime->private_data;
218 pr_debug("setting buffer ptr param\n");
219 sst_set_stream_status(stream, SST_PLATFORM_INIT);
220 stream->stream_info.period_elapsed = sst_period_elapsed;
221 stream->stream_info.mad_substream = substream;
222 stream->stream_info.buffer_ptr = 0;
223 stream->stream_info.sfreq = substream->runtime->rate;
224 ret_val = stream->ops->device_control(
225 SST_SND_STREAM_INIT, &stream->stream_info);
227 pr_err("control_set ret error %d\n", ret_val);
231 /* end -- helper functions */
233 static int sst_platform_open(struct snd_pcm_substream *substream)
235 struct snd_pcm_runtime *runtime = substream->runtime;
236 struct sst_runtime_stream *stream;
239 pr_debug("sst_platform_open called\n");
241 snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
242 ret_val = snd_pcm_hw_constraint_integer(runtime,
243 SNDRV_PCM_HW_PARAM_PERIODS);
247 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
250 spin_lock_init(&stream->status_lock);
252 /* get the sst ops */
253 mutex_lock(&sst_lock);
255 pr_err("no device available to run\n");
256 mutex_unlock(&sst_lock);
260 if (!try_module_get(sst->dev->driver->owner)) {
261 mutex_unlock(&sst_lock);
265 stream->ops = sst->ops;
266 mutex_unlock(&sst_lock);
268 stream->stream_info.str_id = 0;
269 sst_set_stream_status(stream, SST_PLATFORM_INIT);
270 stream->stream_info.mad_substream = substream;
271 /* allocate memory for SST API set */
272 runtime->private_data = stream;
277 static int sst_platform_close(struct snd_pcm_substream *substream)
279 struct sst_runtime_stream *stream;
280 int ret_val = 0, str_id;
282 pr_debug("sst_platform_close called\n");
283 stream = substream->runtime->private_data;
284 str_id = stream->stream_info.str_id;
286 ret_val = stream->ops->close(str_id);
287 module_put(sst->dev->driver->owner);
292 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
294 struct sst_runtime_stream *stream;
295 int ret_val = 0, str_id;
297 pr_debug("sst_platform_pcm_prepare called\n");
298 stream = substream->runtime->private_data;
299 str_id = stream->stream_info.str_id;
300 if (stream->stream_info.str_id) {
301 ret_val = stream->ops->device_control(
302 SST_SND_DROP, &str_id);
306 ret_val = sst_platform_alloc_stream(substream);
309 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
310 "%d", stream->stream_info.str_id);
312 ret_val = sst_platform_init_stream(substream);
315 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
319 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
322 int ret_val = 0, str_id;
323 struct sst_runtime_stream *stream;
326 pr_debug("sst_platform_pcm_trigger called\n");
327 stream = substream->runtime->private_data;
328 str_id = stream->stream_info.str_id;
330 case SNDRV_PCM_TRIGGER_START:
331 pr_debug("sst: Trigger Start\n");
332 str_cmd = SST_SND_START;
333 status = SST_PLATFORM_RUNNING;
334 stream->stream_info.mad_substream = substream;
336 case SNDRV_PCM_TRIGGER_STOP:
337 pr_debug("sst: in stop\n");
338 str_cmd = SST_SND_DROP;
339 status = SST_PLATFORM_DROPPED;
341 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
342 pr_debug("sst: in pause\n");
343 str_cmd = SST_SND_PAUSE;
344 status = SST_PLATFORM_PAUSED;
346 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
347 pr_debug("sst: in pause release\n");
348 str_cmd = SST_SND_RESUME;
349 status = SST_PLATFORM_RUNNING;
354 ret_val = stream->ops->device_control(str_cmd, &str_id);
356 sst_set_stream_status(stream, status);
362 static snd_pcm_uframes_t sst_platform_pcm_pointer
363 (struct snd_pcm_substream *substream)
365 struct sst_runtime_stream *stream;
367 struct pcm_stream_info *str_info;
369 stream = substream->runtime->private_data;
370 status = sst_get_stream_status(stream);
371 if (status == SST_PLATFORM_INIT)
373 str_info = &stream->stream_info;
374 ret_val = stream->ops->device_control(
375 SST_SND_BUFFER_POINTER, str_info);
377 pr_err("sst: error code = %d\n", ret_val);
380 return stream->stream_info.buffer_ptr;
383 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
384 struct snd_pcm_hw_params *params)
386 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
387 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
392 static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
394 return snd_pcm_lib_free_pages(substream);
397 static struct snd_pcm_ops sst_platform_ops = {
398 .open = sst_platform_open,
399 .close = sst_platform_close,
400 .ioctl = snd_pcm_lib_ioctl,
401 .prepare = sst_platform_pcm_prepare,
402 .trigger = sst_platform_pcm_trigger,
403 .pointer = sst_platform_pcm_pointer,
404 .hw_params = sst_platform_pcm_hw_params,
405 .hw_free = sst_platform_pcm_hw_free,
408 static void sst_pcm_free(struct snd_pcm *pcm)
410 pr_debug("sst_pcm_free called\n");
411 snd_pcm_lib_preallocate_free_for_all(pcm);
414 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
416 struct snd_pcm *pcm = rtd->pcm;
419 pr_debug("sst_pcm_new called\n");
420 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
421 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
422 retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
423 SNDRV_DMA_TYPE_CONTINUOUS,
424 snd_dma_continuous_data(GFP_KERNEL),
425 SST_MIN_BUFFER, SST_MAX_BUFFER);
427 pr_err("dma buffer allocationf fail\n");
434 static struct snd_soc_platform_driver sst_soc_platform_drv = {
435 .ops = &sst_platform_ops,
436 .compr_ops = &sst_platform_compr_ops,
437 .pcm_new = sst_pcm_new,
438 .pcm_free = sst_pcm_free,
441 static const struct snd_soc_component_driver sst_component = {
446 static int sst_platform_probe(struct platform_device *pdev)
450 pr_debug("sst_platform_probe called\n");
452 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
454 pr_err("registering soc platform failed\n");
458 ret = snd_soc_register_component(&pdev->dev, &sst_component,
459 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
461 pr_err("registering cpu dais failed\n");
462 snd_soc_unregister_platform(&pdev->dev);
467 static int sst_platform_remove(struct platform_device *pdev)
470 snd_soc_unregister_component(&pdev->dev);
471 snd_soc_unregister_platform(&pdev->dev);
472 pr_debug("sst_platform_remove success\n");
476 static struct platform_driver sst_platform_driver = {
478 .name = "sst-mfld-platform",
479 .owner = THIS_MODULE,
481 .probe = sst_platform_probe,
482 .remove = sst_platform_remove,
485 module_platform_driver(sst_platform_driver);
487 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
488 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
489 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
490 MODULE_LICENSE("GPL v2");
491 MODULE_ALIAS("platform:sst-mfld-platform");