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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3c1af8802e
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
512 lines
13 KiB
C
512 lines
13 KiB
C
/*
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* Intel Baytrail SST PCM Support
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* Copyright (c) 2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include "sst-baytrail-ipc.h"
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#include "sst-dsp-priv.h"
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#include "sst-dsp.h"
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#define BYT_PCM_COUNT 2
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static const struct snd_pcm_hardware sst_byt_pcm_hardware = {
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.info = SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_PAUSE |
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SNDRV_PCM_INFO_RESUME,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_LE,
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.period_bytes_min = 384,
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.period_bytes_max = 48000,
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.periods_min = 2,
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.periods_max = 250,
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.buffer_bytes_max = 96000,
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};
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/* private data for each PCM DSP stream */
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struct sst_byt_pcm_data {
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struct sst_byt_stream *stream;
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struct snd_pcm_substream *substream;
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struct mutex mutex;
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/* latest DSP DMA hw pointer */
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u32 hw_ptr;
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struct work_struct work;
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};
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/* private data for the driver */
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struct sst_byt_priv_data {
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/* runtime DSP */
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struct sst_byt *byt;
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/* DAI data */
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struct sst_byt_pcm_data pcm[BYT_PCM_COUNT];
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/* flag indicating is stream context restore needed after suspend */
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bool restore_stream;
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};
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/* this may get called several times by oss emulation */
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static int sst_byt_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct sst_byt_priv_data *pdata =
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snd_soc_platform_get_drvdata(rtd->platform);
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struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
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struct sst_byt *byt = pdata->byt;
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u32 rate, bits;
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u8 channels;
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int ret, playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
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dev_dbg(rtd->dev, "PCM: hw_params, pcm_data %p\n", pcm_data);
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ret = sst_byt_stream_type(byt, pcm_data->stream,
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1, 1, !playback);
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if (ret < 0) {
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dev_err(rtd->dev, "failed to set stream format %d\n", ret);
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return ret;
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}
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rate = params_rate(params);
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ret = sst_byt_stream_set_rate(byt, pcm_data->stream, rate);
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if (ret < 0) {
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dev_err(rtd->dev, "could not set rate %d\n", rate);
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return ret;
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}
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bits = snd_pcm_format_width(params_format(params));
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ret = sst_byt_stream_set_bits(byt, pcm_data->stream, bits);
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if (ret < 0) {
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dev_err(rtd->dev, "could not set formats %d\n",
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params_rate(params));
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return ret;
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}
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channels = (u8)(params_channels(params) & 0xF);
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ret = sst_byt_stream_set_channels(byt, pcm_data->stream, channels);
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if (ret < 0) {
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dev_err(rtd->dev, "could not set channels %d\n",
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params_rate(params));
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return ret;
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}
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snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
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ret = sst_byt_stream_buffer(byt, pcm_data->stream,
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substream->dma_buffer.addr,
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params_buffer_bytes(params));
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if (ret < 0) {
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dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret);
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return ret;
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}
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ret = sst_byt_stream_commit(byt, pcm_data->stream);
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if (ret < 0) {
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dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int sst_byt_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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dev_dbg(rtd->dev, "PCM: hw_free\n");
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snd_pcm_lib_free_pages(substream);
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return 0;
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}
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static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct sst_byt_priv_data *pdata =
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snd_soc_platform_get_drvdata(rtd->platform);
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struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
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struct sst_byt *byt = pdata->byt;
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int ret;
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/* commit stream using existing stream params */
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ret = sst_byt_stream_commit(byt, pcm_data->stream);
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if (ret < 0) {
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dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
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return ret;
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}
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sst_byt_stream_start(byt, pcm_data->stream, pcm_data->hw_ptr);
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dev_dbg(rtd->dev, "stream context restored at offset %d\n",
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pcm_data->hw_ptr);
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return 0;
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}
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static void sst_byt_pcm_work(struct work_struct *work)
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{
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struct sst_byt_pcm_data *pcm_data =
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container_of(work, struct sst_byt_pcm_data, work);
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if (snd_pcm_running(pcm_data->substream))
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sst_byt_pcm_restore_stream_context(pcm_data->substream);
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}
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static int sst_byt_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct sst_byt_priv_data *pdata =
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snd_soc_platform_get_drvdata(rtd->platform);
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struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
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struct sst_byt *byt = pdata->byt;
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dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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pcm_data->hw_ptr = 0;
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sst_byt_stream_start(byt, pcm_data->stream, 0);
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break;
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case SNDRV_PCM_TRIGGER_RESUME:
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if (pdata->restore_stream == true)
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schedule_work(&pcm_data->work);
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else
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sst_byt_stream_resume(byt, pcm_data->stream);
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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sst_byt_stream_resume(byt, pcm_data->stream);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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sst_byt_stream_stop(byt, pcm_data->stream);
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break;
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case SNDRV_PCM_TRIGGER_SUSPEND:
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pdata->restore_stream = false;
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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sst_byt_stream_pause(byt, pcm_data->stream);
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break;
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default:
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break;
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}
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return 0;
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}
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static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data)
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{
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struct sst_byt_pcm_data *pcm_data = data;
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struct snd_pcm_substream *substream = pcm_data->substream;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct sst_byt_priv_data *pdata =
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snd_soc_platform_get_drvdata(rtd->platform);
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struct sst_byt *byt = pdata->byt;
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u32 pos, hw_pos;
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hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
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snd_pcm_lib_buffer_bytes(substream));
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pcm_data->hw_ptr = hw_pos;
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pos = frames_to_bytes(runtime,
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(runtime->control->appl_ptr %
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runtime->buffer_size));
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dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos);
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snd_pcm_period_elapsed(substream);
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return pos;
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}
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static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct sst_byt_priv_data *pdata =
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snd_soc_platform_get_drvdata(rtd->platform);
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struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
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dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr);
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return bytes_to_frames(runtime, pcm_data->hw_ptr);
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}
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static int sst_byt_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct sst_byt_priv_data *pdata =
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snd_soc_platform_get_drvdata(rtd->platform);
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struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
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struct sst_byt *byt = pdata->byt;
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dev_dbg(rtd->dev, "PCM: open\n");
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mutex_lock(&pcm_data->mutex);
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pcm_data->substream = substream;
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snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware);
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pcm_data->stream = sst_byt_stream_new(byt, substream->stream + 1,
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byt_notify_pointer, pcm_data);
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if (pcm_data->stream == NULL) {
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dev_err(rtd->dev, "failed to create stream\n");
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mutex_unlock(&pcm_data->mutex);
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return -EINVAL;
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}
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mutex_unlock(&pcm_data->mutex);
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return 0;
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}
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static int sst_byt_pcm_close(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct sst_byt_priv_data *pdata =
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snd_soc_platform_get_drvdata(rtd->platform);
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struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
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struct sst_byt *byt = pdata->byt;
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int ret;
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dev_dbg(rtd->dev, "PCM: close\n");
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cancel_work_sync(&pcm_data->work);
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mutex_lock(&pcm_data->mutex);
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ret = sst_byt_stream_free(byt, pcm_data->stream);
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if (ret < 0) {
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dev_dbg(rtd->dev, "Free stream fail\n");
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goto out;
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}
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pcm_data->stream = NULL;
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out:
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mutex_unlock(&pcm_data->mutex);
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return ret;
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}
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static int sst_byt_pcm_mmap(struct snd_pcm_substream *substream,
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struct vm_area_struct *vma)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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dev_dbg(rtd->dev, "PCM: mmap\n");
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return snd_pcm_lib_default_mmap(substream, vma);
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}
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static struct snd_pcm_ops sst_byt_pcm_ops = {
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.open = sst_byt_pcm_open,
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.close = sst_byt_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = sst_byt_pcm_hw_params,
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.hw_free = sst_byt_pcm_hw_free,
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.trigger = sst_byt_pcm_trigger,
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.pointer = sst_byt_pcm_pointer,
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.mmap = sst_byt_pcm_mmap,
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};
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static void sst_byt_pcm_free(struct snd_pcm *pcm)
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{
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snd_pcm_lib_preallocate_free_for_all(pcm);
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}
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static int sst_byt_pcm_new(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_pcm *pcm = rtd->pcm;
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size_t size;
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struct snd_soc_platform *platform = rtd->platform;
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struct sst_pdata *pdata = dev_get_platdata(platform->dev);
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int ret = 0;
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if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
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pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
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size = sst_byt_pcm_hardware.buffer_bytes_max;
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ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
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SNDRV_DMA_TYPE_DEV,
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pdata->dma_dev,
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size, size);
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if (ret) {
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dev_err(rtd->dev, "dma buffer allocation failed %d\n",
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ret);
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return ret;
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}
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}
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return ret;
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}
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static struct snd_soc_dai_driver byt_dais[] = {
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{
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.name = "Baytrail PCM",
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.playback = {
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.stream_name = "System Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S24_3LE |
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SNDRV_PCM_FMTBIT_S16_LE,
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},
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.capture = {
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.stream_name = "Analog Capture",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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},
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};
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static int sst_byt_pcm_probe(struct snd_soc_platform *platform)
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{
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struct sst_pdata *plat_data = dev_get_platdata(platform->dev);
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struct sst_byt_priv_data *priv_data;
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int i;
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if (!plat_data)
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return -ENODEV;
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priv_data = devm_kzalloc(platform->dev, sizeof(*priv_data),
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GFP_KERNEL);
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priv_data->byt = plat_data->dsp;
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snd_soc_platform_set_drvdata(platform, priv_data);
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for (i = 0; i < BYT_PCM_COUNT; i++) {
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mutex_init(&priv_data->pcm[i].mutex);
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INIT_WORK(&priv_data->pcm[i].work, sst_byt_pcm_work);
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}
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return 0;
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}
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static int sst_byt_pcm_remove(struct snd_soc_platform *platform)
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{
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return 0;
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}
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static struct snd_soc_platform_driver byt_soc_platform = {
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.probe = sst_byt_pcm_probe,
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.remove = sst_byt_pcm_remove,
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.ops = &sst_byt_pcm_ops,
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.pcm_new = sst_byt_pcm_new,
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.pcm_free = sst_byt_pcm_free,
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};
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static const struct snd_soc_component_driver byt_dai_component = {
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.name = "byt-dai",
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};
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#ifdef CONFIG_PM
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static int sst_byt_pcm_dev_suspend_late(struct device *dev)
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{
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struct sst_pdata *sst_pdata = dev_get_platdata(dev);
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struct sst_byt_priv_data *priv_data = dev_get_drvdata(dev);
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int ret;
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dev_dbg(dev, "suspending late\n");
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ret = sst_byt_dsp_suspend_late(dev, sst_pdata);
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if (ret < 0) {
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dev_err(dev, "failed to suspend %d\n", ret);
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return ret;
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}
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priv_data->restore_stream = true;
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return ret;
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}
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static int sst_byt_pcm_dev_resume_early(struct device *dev)
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{
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struct sst_pdata *sst_pdata = dev_get_platdata(dev);
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int ret;
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dev_dbg(dev, "resume early\n");
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/* load fw and boot DSP */
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ret = sst_byt_dsp_boot(dev, sst_pdata);
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if (ret)
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return ret;
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/* wait for FW to finish booting */
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return sst_byt_dsp_wait_for_ready(dev, sst_pdata);
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}
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static const struct dev_pm_ops sst_byt_pm_ops = {
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.suspend_late = sst_byt_pcm_dev_suspend_late,
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.resume_early = sst_byt_pcm_dev_resume_early,
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};
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#define SST_BYT_PM_OPS (&sst_byt_pm_ops)
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#else
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#define SST_BYT_PM_OPS NULL
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#endif
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static int sst_byt_pcm_dev_probe(struct platform_device *pdev)
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{
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struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
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int ret;
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ret = sst_byt_dsp_init(&pdev->dev, sst_pdata);
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if (ret < 0)
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return -ENODEV;
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ret = snd_soc_register_platform(&pdev->dev, &byt_soc_platform);
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if (ret < 0)
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goto err_plat;
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ret = snd_soc_register_component(&pdev->dev, &byt_dai_component,
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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",
|
|
.pm = SST_BYT_PM_OPS,
|
|
},
|
|
|
|
.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");
|