Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  sst_mfld_platform.c - Intel MID Platform driver
 *
 *  Copyright (C) 2010-2014 Intel Corp
 *  Author: Vinod Koul <vinod.koul@intel.com>
 *  Author: Harsha Priya <priya.harsha@intel.com>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#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 <sound/compress_driver.h>
#include <asm/platform_sst_audio.h>
#include "sst-mfld-platform.h"
#include "sst-atom-controls.h"
 
struct sst_device *sst;
static DEFINE_MUTEX(sst_lock);
 
int sst_register_dsp(struct sst_device *dev)
{
<------>if (WARN_ON(!dev))
<------><------>return -EINVAL;
<------>if (!try_module_get(dev->dev->driver->owner))
<------><------>return -ENODEV;
<------>mutex_lock(&sst_lock);
<------>if (sst) {
<------><------>dev_err(dev->dev, "we already have a device %s\n", sst->name);
<------><------>module_put(dev->dev->driver->owner);
<------><------>mutex_unlock(&sst_lock);
<------><------>return -EEXIST;
<------>}
<------>dev_dbg(dev->dev, "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)
{
<------>if (WARN_ON(!dev))
<------><------>return -EINVAL;
<------>if (dev != sst)
<------><------>return -EINVAL;
 
<------>mutex_lock(&sst_lock);
 
<------>if (!sst) {
<------><------>mutex_unlock(&sst_lock);
<------><------>return -EIO;
<------>}
 
<------>module_put(sst->dev->driver->owner);
<------>dev_dbg(dev->dev, "unreg %s\n", sst->name);
<------>sst = NULL;
<------>mutex_unlock(&sst_lock);
<------>return 0;
}
EXPORT_SYMBOL_GPL(sst_unregister_dsp);
 
static const 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),
<------>.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,
};
 
static struct sst_dev_stream_map dpcm_strm_map[] = {
<------>{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
<------>{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
<------>{MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
<------>{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
<------>{MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, SST_TASK_ID_MEDIA, 0},
};
 
static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
{
 
<------>return sst_send_pipe_gains(dai, stream, mute);
}
 
/* helper functions */
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_alloc_params(struct snd_pcm_substream *substream,
<------><------><------><------>struct snd_sst_alloc_params_ext *alloc_param)
{
<------>unsigned int channels;
<------>snd_pcm_uframes_t period_size;
<------>ssize_t periodbytes;
<------>ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
<------>u32 buffer_addr = virt_to_phys(substream->runtime->dma_area);
 
<------>channels = substream->runtime->channels;
<------>period_size = substream->runtime->period_size;
<------>periodbytes = samples_to_bytes(substream->runtime, period_size);
<------>alloc_param->ring_buf_info[0].addr = buffer_addr;
<------>alloc_param->ring_buf_info[0].size = buffer_bytes;
<------>alloc_param->sg_count = 1;
<------>alloc_param->reserved = 0;
<------>alloc_param->frag_size = periodbytes * channels;
 
}
static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
<------><------><------><------>struct snd_sst_stream_params *param)
{
<------>param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
<------>param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
<------>param->uc.pcm_params.sfreq = substream->runtime->rate;
 
<------>/* PCM stream via ALSA interface */
<------>param->uc.pcm_params.use_offload_path = 0;
<------>param->uc.pcm_params.reserved2 = 0;
<------>memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
 
}
 
static int sst_get_stream_mapping(int dev, int sdev, int dir,
<------>struct sst_dev_stream_map *map, int size)
{
<------>int i;
 
<------>if (map == NULL)
<------><------>return -EINVAL;
 
 
<------>/* index 0 is not used in stream map */
<------>for (i = 1; i < size; i++) {
<------><------>if ((map[i].dev_num == dev) && (map[i].direction == dir))
<------><------><------>return i;
<------>}
<------>return 0;
}
 
int sst_fill_stream_params(void *substream,
<------>const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
{
<------>int map_size;
<------>int index;
<------>struct sst_dev_stream_map *map;
<------>struct snd_pcm_substream *pstream = NULL;
<------>struct snd_compr_stream *cstream = NULL;
 
<------>map = ctx->pdata->pdev_strm_map;
<------>map_size = ctx->pdata->strm_map_size;
 
<------>if (is_compress)
<------><------>cstream = (struct snd_compr_stream *)substream;
<------>else
<------><------>pstream = (struct snd_pcm_substream *)substream;
 
<------>str_params->stream_type = SST_STREAM_TYPE_MUSIC;
 
<------>/* For pcm streams */
<------>if (pstream) {
<------><------>index = sst_get_stream_mapping(pstream->pcm->device,
<------><------><------><------><------>  pstream->number, pstream->stream,
<------><------><------><------><------>  map, map_size);
<------><------>if (index <= 0)
<------><------><------>return -EINVAL;
 
<------><------>str_params->stream_id = index;
<------><------>str_params->device_type = map[index].device_id;
<------><------>str_params->task = map[index].task_id;
 
<------><------>str_params->ops = (u8)pstream->stream;
<------>}
 
<------>if (cstream) {
<------><------>index = sst_get_stream_mapping(cstream->device->device,
<------><------><------><------><------>       0, cstream->direction,
<------><------><------><------><------>       map, map_size);
<------><------>if (index <= 0)
<------><------><------>return -EINVAL;
<------><------>str_params->stream_id = index;
<------><------>str_params->device_type = map[index].device_id;
<------><------>str_params->task = map[index].task_id;
 
<------><------>str_params->ops = (u8)cstream->direction;
<------>}
<------>return 0;
}
 
static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
<------><------>struct snd_soc_dai *dai)
{
<------>struct sst_runtime_stream *stream =
<------><------><------>substream->runtime->private_data;
<------>struct snd_sst_stream_params param = {{{0,},},};
<------>struct snd_sst_params str_params = {0};
<------>struct snd_sst_alloc_params_ext alloc_params = {0};
<------>int ret_val = 0;
<------>struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
 
<------>/* set codec params and inform SST driver the same */
<------>sst_fill_pcm_params(substream, &param);
<------>sst_fill_alloc_params(substream, &alloc_params);
<------>str_params.sparams = param;
<------>str_params.aparams = alloc_params;
<------>str_params.codec = SST_CODEC_TYPE_PCM;
 
<------>/* fill the device type and stream id to pass to SST driver */
<------>ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
<------>if (ret_val < 0)
<------><------>return ret_val;
 
<------>stream->stream_info.str_id = str_params.stream_id;
 
<------>ret_val = stream->ops->open(sst->dev, &str_params);
<------>if (ret_val <= 0)
<------><------>return ret_val;
 
 
<------>return ret_val;
}
 
static void sst_period_elapsed(void *arg)
{
<------>struct snd_pcm_substream *substream = arg;
<------>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;
<------>struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
<------>int ret_val;
 
<------>dev_dbg(rtd->dev, "setting buffer ptr param\n");
<------>sst_set_stream_status(stream, SST_PLATFORM_INIT);
<------>stream->stream_info.period_elapsed = sst_period_elapsed;
<------>stream->stream_info.arg = substream;
<------>stream->stream_info.buffer_ptr = 0;
<------>stream->stream_info.sfreq = substream->runtime->rate;
<------>ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
<------>if (ret_val)
<------><------>dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
<------>return ret_val;
 
}
 
static int power_up_sst(struct sst_runtime_stream *stream)
{
<------>return stream->ops->power(sst->dev, true);
}
 
static void power_down_sst(struct sst_runtime_stream *stream)
{
<------>stream->ops->power(sst->dev, false);
}
 
static int sst_media_open(struct snd_pcm_substream *substream,
<------><------>struct snd_soc_dai *dai)
{
<------>int ret_val = 0;
<------>struct snd_pcm_runtime *runtime = substream->runtime;
<------>struct sst_runtime_stream *stream;
 
<------>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 ||
<------>    !try_module_get(sst->dev->driver->owner)) {
<------><------>dev_err(dai->dev, "no device available to run\n");
<------><------>ret_val = -ENODEV;
<------><------>goto out_ops;
<------>}
<------>stream->ops = sst->ops;
<------>mutex_unlock(&sst_lock);
 
<------>stream->stream_info.str_id = 0;
 
<------>stream->stream_info.arg = substream;
<------>/* allocate memory for SST API set */
<------>runtime->private_data = stream;
 
<------>ret_val = power_up_sst(stream);
<------>if (ret_val < 0)
<------><------>goto out_power_up;
 
<------>/*
<------> * Make sure the period to be multiple of 1ms to align the
<------> * design of firmware. Apply same rule to buffer size to make
<------> * sure alsa could always find a value for period size
<------> * regardless the buffer size given by user space.
<------> */
<------>snd_pcm_hw_constraint_step(substream->runtime, 0,
<------><------><------>   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 48);
<------>snd_pcm_hw_constraint_step(substream->runtime, 0,
<------><------><------>   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 48);
 
<------>/* Make sure, that the period size is always even */
<------>snd_pcm_hw_constraint_step(substream->runtime, 0,
<------><------><------>   SNDRV_PCM_HW_PARAM_PERIODS, 2);
 
<------>return snd_pcm_hw_constraint_integer(runtime,
<------><------><------> SNDRV_PCM_HW_PARAM_PERIODS);
out_ops:
<------>mutex_unlock(&sst_lock);
out_power_up:
<------>kfree(stream);
<------>return ret_val;
}
 
static void sst_media_close(struct snd_pcm_substream *substream,
<------><------>struct snd_soc_dai *dai)
{
<------>struct sst_runtime_stream *stream;
<------>int str_id;
 
<------>stream = substream->runtime->private_data;
<------>power_down_sst(stream);
 
<------>str_id = stream->stream_info.str_id;
<------>if (str_id)
<------><------>stream->ops->close(sst->dev, str_id);
<------>module_put(sst->dev->driver->owner);
<------>kfree(stream);
}
 
static int sst_media_prepare(struct snd_pcm_substream *substream,
<------><------>struct snd_soc_dai *dai)
{
<------>struct sst_runtime_stream *stream;
<------>int ret_val, str_id;
 
<------>stream = substream->runtime->private_data;
<------>str_id = stream->stream_info.str_id;
<------>if (stream->stream_info.str_id) {
<------><------>ret_val = stream->ops->stream_drop(sst->dev, str_id);
<------><------>return ret_val;
<------>}
 
<------>ret_val = sst_platform_alloc_stream(substream, dai);
<------>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 0;
}
 
static int sst_enable_ssp(struct snd_pcm_substream *substream,
<------><------><------>struct snd_soc_dai *dai)
{
<------>int ret = 0;
 
<------>if (!snd_soc_dai_active(dai)) {
<------><------>ret = sst_handle_vb_timer(dai, true);
<------><------>sst_fill_ssp_defaults(dai);
<------>}
<------>return ret;
}
 
static int sst_be_hw_params(struct snd_pcm_substream *substream,
<------><------><------><------>struct snd_pcm_hw_params *params,
<------><------><------><------>struct snd_soc_dai *dai)
{
<------>int ret = 0;
 
<------>if (snd_soc_dai_active(dai) == 1)
<------><------>ret = send_ssp_cmd(dai, dai->name, 1);
<------>return ret;
}
 
static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
{
<------>int ret = 0;
 
<------>if (!snd_soc_dai_active(dai))
<------><------>return 0;
 
<------>ret = sst_fill_ssp_config(dai, fmt);
<------>if (ret < 0)
<------><------>dev_err(dai->dev, "sst_set_format failed..\n");
 
<------>return ret;
}
 
static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
<------><------><------>unsigned int tx_mask, unsigned int rx_mask,
<------><------><------>int slots, int slot_width) {
<------>int ret = 0;
 
<------>if (!snd_soc_dai_active(dai))
<------><------>return ret;
 
<------>ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
<------>if (ret < 0)
<------><------>dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
 
<------>return ret;
}
 
static void sst_disable_ssp(struct snd_pcm_substream *substream,
<------><------><------>struct snd_soc_dai *dai)
{
<------>if (!snd_soc_dai_active(dai)) {
<------><------>send_ssp_cmd(dai, dai->name, 0);
<------><------>sst_handle_vb_timer(dai, false);
<------>}
}
 
static const struct snd_soc_dai_ops sst_media_dai_ops = {
<------>.startup = sst_media_open,
<------>.shutdown = sst_media_close,
<------>.prepare = sst_media_prepare,
<------>.mute_stream = sst_media_digital_mute,
};
 
static const struct snd_soc_dai_ops sst_compr_dai_ops = {
<------>.mute_stream = sst_media_digital_mute,
};
 
static const struct snd_soc_dai_ops sst_be_dai_ops = {
<------>.startup = sst_enable_ssp,
<------>.hw_params = sst_be_hw_params,
<------>.set_fmt = sst_set_format,
<------>.set_tdm_slot = sst_platform_set_ssp_slot,
<------>.shutdown = sst_disable_ssp,
};
 
static struct snd_soc_dai_driver sst_platform_dai[] = {
{
<------>.name = "media-cpu-dai",
<------>.ops = &sst_media_dai_ops,
<------>.playback = {
<------><------>.stream_name = "Headset Playback",
<------><------>.channels_min = SST_STEREO,
<------><------>.channels_max = SST_STEREO,
<------><------>.rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
<------>.capture = {
<------><------>.stream_name = "Headset Capture",
<------><------>.channels_min = 1,
<------><------>.channels_max = 2,
<------><------>.rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
},
{
<------>.name = "deepbuffer-cpu-dai",
<------>.ops = &sst_media_dai_ops,
<------>.playback = {
<------><------>.stream_name = "Deepbuffer Playback",
<------><------>.channels_min = SST_STEREO,
<------><------>.channels_max = SST_STEREO,
<------><------>.rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
},
{
<------>.name = "compress-cpu-dai",
<------>.compress_new = snd_soc_new_compress,
<------>.ops = &sst_compr_dai_ops,
<------>.playback = {
<------><------>.stream_name = "Compress Playback",
<------><------>.channels_min = 1,
<------>},
},
/* BE CPU  Dais */
{
<------>.name = "ssp0-port",
<------>.ops = &sst_be_dai_ops,
<------>.playback = {
<------><------>.stream_name = "ssp0 Tx",
<------><------>.channels_min = SST_STEREO,
<------><------>.channels_max = SST_STEREO,
<------><------>.rates = SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
<------>.capture = {
<------><------>.stream_name = "ssp0 Rx",
<------><------>.channels_min = SST_STEREO,
<------><------>.channels_max = SST_STEREO,
<------><------>.rates = SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
},
{
<------>.name = "ssp1-port",
<------>.ops = &sst_be_dai_ops,
<------>.playback = {
<------><------>.stream_name = "ssp1 Tx",
<------><------>.channels_min = SST_STEREO,
<------><------>.channels_max = SST_STEREO,
<------><------>.rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
<------>.capture = {
<------><------>.stream_name = "ssp1 Rx",
<------><------>.channels_min = SST_STEREO,
<------><------>.channels_max = SST_STEREO,
<------><------>.rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
},
{
<------>.name = "ssp2-port",
<------>.ops = &sst_be_dai_ops,
<------>.playback = {
<------><------>.stream_name = "ssp2 Tx",
<------><------>.channels_min = SST_STEREO,
<------><------>.channels_max = SST_STEREO,
<------><------>.rates = SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
<------>.capture = {
<------><------>.stream_name = "ssp2 Rx",
<------><------>.channels_min = SST_STEREO,
<------><------>.channels_max = SST_STEREO,
<------><------>.rates = SNDRV_PCM_RATE_48000,
<------><------>.formats = SNDRV_PCM_FMTBIT_S16_LE,
<------>},
},
};
 
static int sst_soc_open(struct snd_soc_component *component,
<------><------><------>struct snd_pcm_substream *substream)
{
<------>struct snd_pcm_runtime *runtime;
 
<------>if (substream->pcm->internal)
<------><------>return 0;
 
<------>runtime = substream->runtime;
<------>runtime->hw = sst_platform_pcm_hw;
<------>return 0;
}
 
static int sst_soc_trigger(struct snd_soc_component *component,
<------><------><------>   struct snd_pcm_substream *substream, int cmd)
{
<------>int ret_val = 0, str_id;
<------>struct sst_runtime_stream *stream;
<------>int status;
<------>struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 
<------>dev_dbg(rtd->dev, "%s called\n", __func__);
<------>if (substream->pcm->internal)
<------><------>return 0;
<------>stream = substream->runtime->private_data;
<------>str_id = stream->stream_info.str_id;
<------>switch (cmd) {
<------>case SNDRV_PCM_TRIGGER_START:
<------><------>dev_dbg(rtd->dev, "sst: Trigger Start\n");
<------><------>status = SST_PLATFORM_RUNNING;
<------><------>stream->stream_info.arg = substream;
<------><------>ret_val = stream->ops->stream_start(sst->dev, str_id);
<------><------>break;
<------>case SNDRV_PCM_TRIGGER_STOP:
<------><------>dev_dbg(rtd->dev, "sst: in stop\n");
<------><------>status = SST_PLATFORM_DROPPED;
<------><------>ret_val = stream->ops->stream_drop(sst->dev, str_id);
<------><------>break;
<------>case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
<------>case SNDRV_PCM_TRIGGER_SUSPEND:
<------><------>dev_dbg(rtd->dev, "sst: in pause\n");
<------><------>status = SST_PLATFORM_PAUSED;
<------><------>ret_val = stream->ops->stream_pause(sst->dev, str_id);
<------><------>break;
<------>case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
<------>case SNDRV_PCM_TRIGGER_RESUME:
<------><------>dev_dbg(rtd->dev, "sst: in pause release\n");
<------><------>status = SST_PLATFORM_RUNNING;
<------><------>ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
<------><------>break;
<------>default:
<------><------>return -EINVAL;
<------>}
 
<------>if (!ret_val)
<------><------>sst_set_stream_status(stream, status);
 
<------>return ret_val;
}
 
 
static snd_pcm_uframes_t sst_soc_pointer(struct snd_soc_component *component,
<------><------><------><------><------> struct snd_pcm_substream *substream)
{
<------>struct sst_runtime_stream *stream;
<------>int ret_val, status;
<------>struct pcm_stream_info *str_info;
<------>struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 
<------>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->stream_read_tstamp(sst->dev, str_info);
<------>if (ret_val) {
<------><------>dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
<------><------>return ret_val;
<------>}
<------>substream->runtime->delay = str_info->pcm_delay;
<------>return str_info->buffer_ptr;
}
 
static int sst_soc_pcm_new(struct snd_soc_component *component,
<------><------><------>   struct snd_soc_pcm_runtime *rtd)
{
<------>struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
<------>struct snd_pcm *pcm = rtd->pcm;
 
<------>if (dai->driver->playback.channels_min ||
<------><------><------>dai->driver->capture.channels_min) {
<------><------>snd_pcm_set_managed_buffer_all(pcm,
<------><------><------>SNDRV_DMA_TYPE_CONTINUOUS,
<------><------><------>snd_dma_continuous_data(GFP_DMA),
<------><------><------>SST_MIN_BUFFER, SST_MAX_BUFFER);
<------>}
<------>return 0;
}
 
static int sst_soc_probe(struct snd_soc_component *component)
{
<------>struct sst_data *drv = dev_get_drvdata(component->dev);
 
<------>drv->soc_card = component->card;
<------>return sst_dsp_init_v2_dpcm(component);
}
 
static void sst_soc_remove(struct snd_soc_component *component)
{
<------>struct sst_data *drv = dev_get_drvdata(component->dev);
 
<------>drv->soc_card = NULL;
}
 
static const struct snd_soc_component_driver sst_soc_platform_drv  = {
<------>.name		= DRV_NAME,
<------>.probe		= sst_soc_probe,
<------>.remove		= sst_soc_remove,
<------>.open		= sst_soc_open,
<------>.trigger	= sst_soc_trigger,
<------>.pointer	= sst_soc_pointer,
<------>.compress_ops	= &sst_platform_compress_ops,
<------>.pcm_construct	= sst_soc_pcm_new,
};
 
static int sst_platform_probe(struct platform_device *pdev)
{
<------>struct sst_data *drv;
<------>int ret;
<------>struct sst_platform_data *pdata;
 
<------>drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
<------>if (drv == NULL) {
<------><------>return -ENOMEM;
<------>}
 
<------>pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
<------>if (pdata == NULL) {
<------><------>return -ENOMEM;
<------>}
 
<------>pdata->pdev_strm_map = dpcm_strm_map;
<------>pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
<------>drv->pdata = pdata;
<------>drv->pdev = pdev;
<------>mutex_init(&drv->lock);
<------>dev_set_drvdata(&pdev->dev, drv);
 
<------>ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
<------><------><------><------>sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
<------>if (ret)
<------><------>dev_err(&pdev->dev, "registering cpu dais failed\n");
 
<------>return ret;
}
 
static int sst_platform_remove(struct platform_device *pdev)
{
<------>dev_dbg(&pdev->dev, "sst_platform_remove success\n");
<------>return 0;
}
 
#ifdef CONFIG_PM_SLEEP
 
static int sst_soc_prepare(struct device *dev)
{
<------>struct sst_data *drv = dev_get_drvdata(dev);
<------>struct snd_soc_pcm_runtime *rtd;
 
<------>if (!drv->soc_card)
<------><------>return 0;
 
<------>/* suspend all pcms first */
<------>snd_soc_suspend(drv->soc_card->dev);
<------>snd_soc_poweroff(drv->soc_card->dev);
 
<------>/* set the SSPs to idle */
<------>for_each_card_rtds(drv->soc_card, rtd) {
<------><------>struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 
<------><------>if (snd_soc_dai_active(dai)) {
<------><------><------>send_ssp_cmd(dai, dai->name, 0);
<------><------><------>sst_handle_vb_timer(dai, false);
<------><------>}
<------>}
 
<------>return 0;
}
 
static void sst_soc_complete(struct device *dev)
{
<------>struct sst_data *drv = dev_get_drvdata(dev);
<------>struct snd_soc_pcm_runtime *rtd;
 
<------>if (!drv->soc_card)
<------><------>return;
 
<------>/* restart SSPs */
<------>for_each_card_rtds(drv->soc_card, rtd) {
<------><------>struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 
<------><------>if (snd_soc_dai_active(dai)) {
<------><------><------>sst_handle_vb_timer(dai, true);
<------><------><------>send_ssp_cmd(dai, dai->name, 1);
<------><------>}
<------>}
<------>snd_soc_resume(drv->soc_card->dev);
}
 
#else
 
#define sst_soc_prepare NULL
#define sst_soc_complete NULL
 
#endif
 
 
static const struct dev_pm_ops sst_platform_pm = {
<------>.prepare	= sst_soc_prepare,
<------>.complete	= sst_soc_complete,
};
 
static struct platform_driver sst_platform_driver = {
<------>.driver		= {
<------><------>.name		= "sst-mfld-platform",
<------><------>.pm             = &sst_platform_pm,
<------>},
<------>.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-atom-hifi2-platform");
MODULE_ALIAS("platform:sst-mfld-platform");