This adds the Baytrail SST DSP PCM platform driver. It registers itself with the ALSA SoC layer and uses Intel Baytrail SST DSP IPC for DSP control.
Signed-off-by: Jarkko Nikula jarkko.nikula@linux.intel.com --- sound/soc/intel/sst-baytrail-pcm.c | 422 +++++++++++++++++++++++++++++++++++++ 1 file changed, 422 insertions(+) create mode 100644 sound/soc/intel/sst-baytrail-pcm.c
diff --git a/sound/soc/intel/sst-baytrail-pcm.c b/sound/soc/intel/sst-baytrail-pcm.c new file mode 100644 index 000000000000..6d101f3813b4 --- /dev/null +++ b/sound/soc/intel/sst-baytrail-pcm.c @@ -0,0 +1,422 @@ +/* + * Intel Baytrail SST PCM Support + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + */ + +#include <linux/module.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include "sst-baytrail-ipc.h" +#include "sst-dsp-priv.h" +#include "sst-dsp.h" + +#define BYT_PCM_COUNT 2 + +static const struct snd_pcm_hardware sst_byt_pcm_hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_PAUSE | + SNDRV_PCM_INFO_RESUME, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FORMAT_S24_LE, + .period_bytes_min = 384, + .period_bytes_max = 48000, + .periods_min = 2, + .periods_max = 250, + .buffer_bytes_max = 96000, +}; + +/* private data for each PCM DSP stream */ +struct sst_byt_pcm_data { + struct sst_byt_stream *stream; + struct snd_pcm_substream *substream; + struct mutex mutex; +}; + +/* private data for the driver */ +struct sst_byt_priv_data { + /* runtime DSP */ + struct sst_byt *byt; + + /* DAI data */ + struct sst_byt_pcm_data pcm[BYT_PCM_COUNT]; +}; + +/* this may get called several times by oss emulation */ +static int sst_byt_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct sst_byt_priv_data *pdata = + snd_soc_platform_get_drvdata(rtd->platform); + struct sst_byt_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd); + struct sst_byt *byt = pdata->byt; + u32 rate, bits; + u8 channels; + int ret, playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); + + dev_dbg(rtd->dev, "PCM: hw_params, pcm_data %p\n", pcm_data); + + ret = sst_byt_stream_type(byt, pcm_data->stream, + 1, 1, !playback); + if (ret < 0) { + dev_err(rtd->dev, "failed to set stream format %d\n", ret); + return ret; + } + + rate = params_rate(params); + ret = sst_byt_stream_set_rate(byt, pcm_data->stream, rate); + if (ret < 0) { + dev_err(rtd->dev, "could not set rate %d\n", rate); + return ret; + } + + bits = snd_pcm_format_width(params_format(params)); + ret = sst_byt_stream_set_bits(byt, pcm_data->stream, bits); + if (ret < 0) { + dev_err(rtd->dev, "could not set formats %d\n", + params_rate(params)); + return ret; + } + + channels = (u8)(params_channels(params) & 0xF); + ret = sst_byt_stream_set_channels(byt, pcm_data->stream, channels); + if (ret < 0) { + dev_err(rtd->dev, "could not set channels %d\n", + params_rate(params)); + return ret; + } + + snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); + + ret = sst_byt_stream_buffer(byt, pcm_data->stream, + substream->dma_buffer.addr, + params_buffer_bytes(params)); + if (ret < 0) { + dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret); + return ret; + } + + ret = sst_byt_stream_commit(byt, pcm_data->stream); + if (ret < 0) { + dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret); + return ret; + } + + return 0; +} + +static int sst_byt_pcm_hw_free(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + + dev_dbg(rtd->dev, "PCM: hw_free\n"); + snd_pcm_lib_free_pages(substream); + + return 0; +} + +static int sst_byt_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct sst_byt_priv_data *pdata = + snd_soc_platform_get_drvdata(rtd->platform); + struct sst_byt_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd); + struct sst_byt *byt = pdata->byt; + + dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + sst_byt_stream_start(byt, pcm_data->stream); + break; + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + sst_byt_stream_resume(byt, pcm_data->stream); + break; + case SNDRV_PCM_TRIGGER_STOP: + sst_byt_stream_stop(byt, pcm_data->stream); + break; + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + sst_byt_stream_pause(byt, pcm_data->stream); + break; + default: + break; + } + + return 0; +} + +static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data) +{ + struct sst_byt_pcm_data *pcm_data = data; + struct snd_pcm_substream *substream = pcm_data->substream; + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + u32 pos; + + pos = frames_to_bytes(runtime, + (runtime->control->appl_ptr % + runtime->buffer_size)); + + dev_dbg(rtd->dev, "PCM: App pointer %d bytes\n", pos); + + snd_pcm_period_elapsed(substream); + return pos; +} + +static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_pcm_runtime *runtime = substream->runtime; + struct sst_byt_priv_data *pdata = + snd_soc_platform_get_drvdata(rtd->platform); + struct sst_byt_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd); + struct sst_byt *byt = pdata->byt; + snd_pcm_uframes_t offset; + int pos; + + pos = sst_byt_get_dsp_position(byt, pcm_data->stream, + snd_pcm_lib_buffer_bytes(substream)); + offset = bytes_to_frames(runtime, pos); + + dev_dbg(rtd->dev, "PCM: DMA pointer %zu bytes\n", + frames_to_bytes(runtime, (u32)offset)); + return offset; +} + +static int sst_byt_pcm_open(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct sst_byt_priv_data *pdata = + snd_soc_platform_get_drvdata(rtd->platform); + struct sst_byt_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd); + struct sst_byt *byt = pdata->byt; + + dev_dbg(rtd->dev, "PCM: open\n"); + + pcm_data = &pdata->pcm[rtd->cpu_dai->id]; + mutex_lock(&pcm_data->mutex); + + snd_soc_pcm_set_drvdata(rtd, pcm_data); + pcm_data->substream = substream; + + snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware); + + pcm_data->stream = sst_byt_stream_new(byt, rtd->cpu_dai->id + 1, + byt_notify_pointer, pcm_data); + if (pcm_data->stream == NULL) { + dev_err(rtd->dev, "failed to create stream\n"); + mutex_unlock(&pcm_data->mutex); + return -EINVAL; + } + + mutex_unlock(&pcm_data->mutex); + return 0; +} + +static int sst_byt_pcm_close(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct sst_byt_priv_data *pdata = + snd_soc_platform_get_drvdata(rtd->platform); + struct sst_byt_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd); + struct sst_byt *byt = pdata->byt; + int ret; + + dev_dbg(rtd->dev, "PCM: close\n"); + + mutex_lock(&pcm_data->mutex); + ret = sst_byt_stream_free(byt, pcm_data->stream); + if (ret < 0) { + dev_dbg(rtd->dev, "Free stream fail\n"); + goto out; + } + pcm_data->stream = NULL; + +out: + mutex_unlock(&pcm_data->mutex); + return ret; +} + +static int sst_byt_pcm_mmap(struct snd_pcm_substream *substream, + struct vm_area_struct *vma) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + + dev_dbg(rtd->dev, "PCM: mmap\n"); + return snd_pcm_lib_default_mmap(substream, vma); +} + +static struct snd_pcm_ops sst_byt_pcm_ops = { + .open = sst_byt_pcm_open, + .close = sst_byt_pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = sst_byt_pcm_hw_params, + .hw_free = sst_byt_pcm_hw_free, + .trigger = sst_byt_pcm_trigger, + .pointer = sst_byt_pcm_pointer, + .mmap = sst_byt_pcm_mmap, +}; + +static void sst_byt_pcm_free(struct snd_pcm *pcm) +{ + snd_pcm_lib_preallocate_free_for_all(pcm); +} + +static int sst_byt_pcm_new(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_pcm *pcm = rtd->pcm; + size_t size; + int ret = 0; + + ret = dma_coerce_mask_and_coherent(rtd->card->dev, DMA_BIT_MASK(32)); + if (ret) + return ret; + + if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream || + pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { + size = sst_byt_pcm_hardware.buffer_bytes_max; + ret = snd_pcm_lib_preallocate_pages_for_all(pcm, + SNDRV_DMA_TYPE_DEV, + rtd->card->dev, + size, size); + if (ret) { + dev_err(rtd->dev, "dma buffer allocation failed %d\n", + ret); + return ret; + } + } + + return ret; +} + +static struct snd_soc_dai_driver byt_dais[] = { + { + .name = "Front-cpu-dai", + .playback = { + .stream_name = "System Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S24_3LE | + SNDRV_PCM_FMTBIT_S16_LE, + }, + }, + { + .name = "Mic1-cpu-dai", + .capture = { + .stream_name = "Analog Capture", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, + }, +}; + +static int sst_byt_pcm_probe(struct snd_soc_platform *platform) +{ + struct sst_pdata *plat_data = dev_get_platdata(platform->dev); + struct sst_byt_priv_data *priv_data; + int i; + + if (!plat_data) + return -ENODEV; + + priv_data = devm_kzalloc(platform->dev, sizeof(*priv_data), + GFP_KERNEL); + priv_data->byt = plat_data->dsp; + snd_soc_platform_set_drvdata(platform, priv_data); + + for (i = 0; i < ARRAY_SIZE(byt_dais); i++) + mutex_init(&priv_data->pcm[i].mutex); + + return 0; +} + +static int sst_byt_pcm_remove(struct snd_soc_platform *platform) +{ + return 0; +} + +static struct snd_soc_platform_driver byt_soc_platform = { + .probe = sst_byt_pcm_probe, + .remove = sst_byt_pcm_remove, + .ops = &sst_byt_pcm_ops, + .pcm_new = sst_byt_pcm_new, + .pcm_free = sst_byt_pcm_free, +}; + +static const struct snd_soc_component_driver byt_dai_component = { + .name = "byt-dai", +}; + +static int sst_byt_pcm_dev_probe(struct platform_device *pdev) +{ + struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev); + int ret; + + ret = sst_byt_dsp_init(&pdev->dev, sst_pdata); + if (ret < 0) + return -ENODEV; + + ret = snd_soc_register_platform(&pdev->dev, &byt_soc_platform); + if (ret < 0) + goto err_plat; + + ret = snd_soc_register_component(&pdev->dev, &byt_dai_component, + byt_dais, ARRAY_SIZE(byt_dais)); + if (ret < 0) + goto err_comp; + + return 0; + +err_comp: + snd_soc_unregister_platform(&pdev->dev); +err_plat: + sst_byt_dsp_free(&pdev->dev, sst_pdata); + return ret; +} + +static int sst_byt_pcm_dev_remove(struct platform_device *pdev) +{ + struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev); + + snd_soc_unregister_platform(&pdev->dev); + snd_soc_unregister_component(&pdev->dev); + sst_byt_dsp_free(&pdev->dev, sst_pdata); + + return 0; +} + +static struct platform_driver sst_byt_pcm_driver = { + .driver = { + .name = "baytrail-pcm-audio", + .owner = THIS_MODULE, + }, + + .probe = sst_byt_pcm_dev_probe, + .remove = sst_byt_pcm_dev_remove, +}; +module_platform_driver(sst_byt_pcm_driver); + +MODULE_AUTHOR("Jarkko Nikula"); +MODULE_DESCRIPTION("Baytrail PCM"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:baytrail-pcm-audio");