- 根目录:
- sound
- soc
- mid-x86
- sst_platform.c
/*
* sst_platform.c - Intel MID Platform driver
*
* Copyright (C) 2010 Intel Corp
* Author: Vinod Koul <vinod.koul@intel.com>
* Author: Harsha Priya <priya.harsha@intel.com>
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "sst_platform.h"
static struct sst_device *sst;
static DEFINE_MUTEX(sst_lock);
int sst_register_dsp(struct sst_device *dev)
{
BUG_ON(!dev);
if (!try_module_get(dev->dev->driver->owner))
return -ENODEV;
mutex_lock(&sst_lock);
if (sst) {
pr_err("we already have a device %s\n", sst->name);
module_put(dev->dev->driver->owner);
mutex_unlock(&sst_lock);
return -EEXIST;
}
pr_debug("registering device %s\n", dev->name);
sst = dev;
mutex_unlock(&sst_lock);
return 0;
}
EXPORT_SYMBOL_GPL(sst_register_dsp);
int sst_unregister_dsp(struct sst_device *dev)
{
BUG_ON(!dev);
if (dev != sst)
return -EINVAL;
mutex_lock(&sst_lock);
if (!sst) {
mutex_unlock(&sst_lock);
return -EIO;
}
module_put(sst->dev->driver->owner);
pr_debug("unreg %s\n", sst->name);
sst = NULL;
mutex_unlock(&sst_lock);
return 0;
}
EXPORT_SYMBOL_GPL(sst_unregister_dsp);
static struct snd_pcm_hardware sst_platform_pcm_hw = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_DOUBLE |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_MMAP|
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_SYNC_START),
.formats = (SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_U16 |
SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_U24 |
SNDRV_PCM_FMTBIT_S32 | SNDRV_PCM_FMTBIT_U32),
.rates = (SNDRV_PCM_RATE_8000|
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000),
.rate_min = SST_MIN_RATE,
.rate_max = SST_MAX_RATE,
.channels_min = SST_MIN_CHANNEL,
.channels_max = SST_MAX_CHANNEL,
.buffer_bytes_max = SST_MAX_BUFFER,
.period_bytes_min = SST_MIN_PERIOD_BYTES,
.period_bytes_max = SST_MAX_PERIOD_BYTES,
.periods_min = SST_MIN_PERIODS,
.periods_max = SST_MAX_PERIODS,
.fifo_size = SST_FIFO_SIZE,
};
/* MFLD - MSIC */
static struct snd_soc_dai_driver sst_platform_dai[] = {
{
.name = "Headset-cpu-dai",
.id = 0,
.playback = {
.channels_min = SST_STEREO,
.channels_max = SST_STEREO,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S24_LE,
},
.capture = {
.channels_min = 1,
.channels_max = 5,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S24_LE,
},
},
{
.name = "Speaker-cpu-dai",
.id = 1,
.playback = {
.channels_min = SST_MONO,
.channels_max = SST_STEREO,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S24_LE,
},
},
{
.name = "Vibra1-cpu-dai",
.id = 2,
.playback = {
.channels_min = SST_MONO,
.channels_max = SST_MONO,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S24_LE,
},
},
{
.name = "Vibra2-cpu-dai",
.id = 3,
.playback = {
.channels_min = SST_MONO,
.channels_max = SST_STEREO,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S24_LE,
},
},
};
/* helper functions */
static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
int state)
{
unsigned long flags;
spin_lock_irqsave(&stream->status_lock, flags);
stream->stream_status = state;
spin_unlock_irqrestore(&stream->status_lock, flags);
}
static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
{
int state;
unsigned long flags;
spin_lock_irqsave(&stream->status_lock, flags);
state = stream->stream_status;
spin_unlock_irqrestore(&stream->status_lock, flags);
return state;
}
static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
struct sst_pcm_params *param)
{
param->codec = SST_CODEC_TYPE_PCM;
param->num_chan = (u8) substream->runtime->channels;
param->pcm_wd_sz = substream->runtime->sample_bits;
param->reserved = 0;
param->sfreq = substream->runtime->rate;
param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
param->period_count = substream->runtime->period_size;
param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
pr_debug("period_cnt = %d\n", param->period_count);
pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
}
static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
{
struct sst_runtime_stream *stream =
substream->runtime->private_data;
struct sst_pcm_params param = {0};
struct sst_stream_params str_params = {0};
int ret_val;
/* set codec params and inform SST driver the same */
sst_fill_pcm_params(substream, ¶m);
substream->runtime->dma_area = substream->dma_buffer.area;
str_params.sparams = param;
str_params.codec = param.codec;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
str_params.ops = STREAM_OPS_PLAYBACK;
str_params.device_type = substream->pcm->device + 1;
pr_debug("Playbck stream,Device %d\n",
substream->pcm->device);
} else {
str_params.ops = STREAM_OPS_CAPTURE;
str_params.device_type = SND_SST_DEVICE_CAPTURE;
pr_debug("Capture stream,Device %d\n",
substream->pcm->device);
}
ret_val = stream->ops->open(&str_params);
pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
if (ret_val < 0)
return ret_val;
stream->stream_info.str_id = ret_val;
pr_debug("str id : %d\n", stream->stream_info.str_id);
return ret_val;
}
static void sst_period_elapsed(void *mad_substream)
{
struct snd_pcm_substream *substream = mad_substream;
struct sst_runtime_stream *stream;
int status;
if (!substream || !substream->runtime)
return;
stream = substream->runtime->private_data;
if (!stream)
return;
status = sst_get_stream_status(stream);
if (status != SST_PLATFORM_RUNNING)
return;
snd_pcm_period_elapsed(substream);
}
static int sst_platform_init_stream(struct snd_pcm_substream *substream)
{
struct sst_runtime_stream *stream =
substream->runtime->private_data;
int ret_val;
pr_debug("setting buffer ptr param\n");
sst_set_stream_status(stream, SST_PLATFORM_INIT);
stream->stream_info.period_elapsed = sst_period_elapsed;
stream->stream_info.mad_substream = substream;
stream->stream_info.buffer_ptr = 0;
stream->stream_info.sfreq = substream->runtime->rate;
ret_val = stream->ops->device_control(
SST_SND_STREAM_INIT, &stream->stream_info);
if (ret_val)
pr_err("control_set ret error %d\n", ret_val);
return ret_val;
}
/* end -- helper functions */
static int sst_platform_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct sst_runtime_stream *stream;
int ret_val;
pr_debug("sst_platform_open called\n");
snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
ret_val = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret_val < 0)
return ret_val;
stream = kzalloc(sizeof(*stream), GFP_KERNEL);
if (!stream)
return -ENOMEM;
spin_lock_init(&stream->status_lock);
/* get the sst ops */
mutex_lock(&sst_lock);
if (!sst) {
pr_err("no device available to run\n");
mutex_unlock(&sst_lock);
kfree(stream);
return -ENODEV;
}
if (!try_module_get(sst->dev->driver->owner)) {
mutex_unlock(&sst_lock);
kfree(stream);
return -ENODEV;
}
stream->ops = sst->ops;
mutex_unlock(&sst_lock);
stream->stream_info.str_id = 0;
sst_set_stream_status(stream, SST_PLATFORM_INIT);
stream->stream_info.mad_substream = substream;
/* allocate memory for SST API set */
runtime->private_data = stream;
return 0;
}
static int sst_platform_close(struct snd_pcm_substream *substream)
{
struct sst_runtime_stream *stream;
int ret_val = 0, str_id;
pr_debug("sst_platform_close called\n");
stream = substream->runtime->private_data;
str_id = stream->stream_info.str_id;
if (str_id)
ret_val = stream->ops->close(str_id);
module_put(sst->dev->driver->owner);
kfree(stream);
return ret_val;
}
static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
{
struct sst_runtime_stream *stream;
int ret_val = 0, str_id;
pr_debug("sst_platform_pcm_prepare called\n");
stream = substream->runtime->private_data;
str_id = stream->stream_info.str_id;
if (stream->stream_info.str_id) {
ret_val = stream->ops->device_control(
SST_SND_DROP, &str_id);
return ret_val;
}
ret_val = sst_platform_alloc_stream(substream);
if (ret_val < 0)
return ret_val;
snprintf(substream->pcm->id, sizeof(substream->pcm->id),
"%d", stream->stream_info.str_id);
ret_val = sst_platform_init_stream(substream);
if (ret_val)
return ret_val;
substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
return ret_val;
}
static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
int cmd)
{
int ret_val = 0, str_id;
struct sst_runtime_stream *stream;
int str_cmd, status;
pr_debug("sst_platform_pcm_trigger called\n");
stream = substream->runtime->private_data;
str_id = stream->stream_info.str_id;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
pr_debug("sst: Trigger Start\n");
str_cmd = SST_SND_START;
status = SST_PLATFORM_RUNNING;
stream->stream_info.mad_substream = substream;
break;
case SNDRV_PCM_TRIGGER_STOP:
pr_debug("sst: in stop\n");
str_cmd = SST_SND_DROP;
status = SST_PLATFORM_DROPPED;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
pr_debug("sst: in pause\n");
str_cmd = SST_SND_PAUSE;
status = SST_PLATFORM_PAUSED;
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
pr_debug("sst: in pause release\n");
str_cmd = SST_SND_RESUME;
status = SST_PLATFORM_RUNNING;
break;
default:
return -EINVAL;
}
ret_val = stream->ops->device_control(str_cmd, &str_id);
if (!ret_val)
sst_set_stream_status(stream, status);
return ret_val;
}
static snd_pcm_uframes_t sst_platform_pcm_pointer
(struct snd_pcm_substream *substream)
{
struct sst_runtime_stream *stream;
int ret_val, status;
struct pcm_stream_info *str_info;
stream = substream->runtime->private_data;
status = sst_get_stream_status(stream);
if (status == SST_PLATFORM_INIT)
return 0;
str_info = &stream->stream_info;
ret_val = stream->ops->device_control(
SST_SND_BUFFER_POINTER, str_info);
if (ret_val) {
pr_err("sst: error code = %d\n", ret_val);
return ret_val;
}
return stream->stream_info.buffer_ptr;
}
static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
return 0;
}
static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
static struct snd_pcm_ops sst_platform_ops = {
.open = sst_platform_open,
.close = sst_platform_close,
.ioctl = snd_pcm_lib_ioctl,
.prepare = sst_platform_pcm_prepare,
.trigger = sst_platform_pcm_trigger,
.pointer = sst_platform_pcm_pointer,
.hw_params = sst_platform_pcm_hw_params,
.hw_free = sst_platform_pcm_hw_free,
};
static void sst_pcm_free(struct snd_pcm *pcm)
{
pr_debug("sst_pcm_free called\n");
snd_pcm_lib_preallocate_free_for_all(pcm);
}
static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_pcm *pcm = rtd->pcm;
int retval = 0;
pr_debug("sst_pcm_new called\n");
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
SNDRV_DMA_TYPE_CONTINUOUS,
snd_dma_continuous_data(GFP_KERNEL),
SST_MIN_BUFFER, SST_MAX_BUFFER);
if (retval) {
pr_err("dma buffer allocationf fail\n");
return retval;
}
}
return retval;
}
static struct snd_soc_platform_driver sst_soc_platform_drv = {
.ops = &sst_platform_ops,
.pcm_new = sst_pcm_new,
.pcm_free = sst_pcm_free,
};
static int sst_platform_probe(struct platform_device *pdev)
{
int ret;
pr_debug("sst_platform_probe called\n");
sst = NULL;
ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
if (ret) {
pr_err("registering soc platform failed\n");
return ret;
}
ret = snd_soc_register_dais(&pdev->dev,
sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
if (ret) {
pr_err("registering cpu dais failed\n");
snd_soc_unregister_platform(&pdev->dev);
}
return ret;
}
static int sst_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
snd_soc_unregister_platform(&pdev->dev);
pr_debug("sst_platform_remove success\n");
return 0;
}
static struct platform_driver sst_platform_driver = {
.driver = {
.name = "sst-platform",
.owner = THIS_MODULE,
},
.probe = sst_platform_probe,
.remove = sst_platform_remove,
};
module_platform_driver(sst_platform_driver);
MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:sst-platform");