442 lines
12 KiB
C
442 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2021, Linaro Limited
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <linux/spinlock.h>
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#include <sound/pcm.h>
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#include <asm/dma.h>
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#include <linux/dma-mapping.h>
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#include <linux/of_device.h>
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#include <sound/pcm_params.h>
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#include "q6apm.h"
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#define DRV_NAME "q6apm-dai"
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#define PLAYBACK_MIN_NUM_PERIODS 2
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#define PLAYBACK_MAX_NUM_PERIODS 8
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#define PLAYBACK_MAX_PERIOD_SIZE 65536
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#define PLAYBACK_MIN_PERIOD_SIZE 128
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#define CAPTURE_MIN_NUM_PERIODS 2
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#define CAPTURE_MAX_NUM_PERIODS 8
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#define CAPTURE_MAX_PERIOD_SIZE 4096
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#define CAPTURE_MIN_PERIOD_SIZE 320
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#define BUFFER_BYTES_MAX (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE)
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#define BUFFER_BYTES_MIN (PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE)
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#define SID_MASK_DEFAULT 0xF
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enum stream_state {
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Q6APM_STREAM_IDLE = 0,
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Q6APM_STREAM_STOPPED,
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Q6APM_STREAM_RUNNING,
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};
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struct q6apm_dai_rtd {
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struct snd_pcm_substream *substream;
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struct snd_compr_stream *cstream;
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struct snd_compr_params codec_param;
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struct snd_dma_buffer dma_buffer;
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phys_addr_t phys;
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unsigned int pcm_size;
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unsigned int pcm_count;
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unsigned int pos; /* Buffer position */
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unsigned int periods;
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unsigned int bytes_sent;
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unsigned int bytes_received;
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unsigned int copied_total;
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uint16_t bits_per_sample;
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uint16_t source; /* Encoding source bit mask */
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uint16_t session_id;
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enum stream_state state;
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struct q6apm_graph *graph;
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spinlock_t lock;
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};
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struct q6apm_dai_data {
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long long sid;
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};
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static struct snd_pcm_hardware q6apm_dai_hardware_capture = {
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
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SNDRV_PCM_INFO_BATCH),
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.formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
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.rates = SNDRV_PCM_RATE_8000_48000,
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.rate_min = 8000,
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.rate_max = 48000,
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.channels_min = 2,
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.channels_max = 4,
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.buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
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.period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
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.period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
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.periods_min = CAPTURE_MIN_NUM_PERIODS,
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.periods_max = CAPTURE_MAX_NUM_PERIODS,
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.fifo_size = 0,
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};
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static struct snd_pcm_hardware q6apm_dai_hardware_playback = {
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
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SNDRV_PCM_INFO_BATCH),
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.formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE),
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.rates = SNDRV_PCM_RATE_8000_192000,
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.rate_min = 8000,
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.rate_max = 192000,
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.channels_min = 2,
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.channels_max = 8,
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.buffer_bytes_max = (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE),
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.period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
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.period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
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.periods_min = PLAYBACK_MIN_NUM_PERIODS,
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.periods_max = PLAYBACK_MAX_NUM_PERIODS,
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.fifo_size = 0,
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};
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static void event_handler(uint32_t opcode, uint32_t token, uint32_t *payload, void *priv)
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{
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struct q6apm_dai_rtd *prtd = priv;
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struct snd_pcm_substream *substream = prtd->substream;
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unsigned long flags;
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switch (opcode) {
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case APM_CLIENT_EVENT_CMD_EOS_DONE:
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prtd->state = Q6APM_STREAM_STOPPED;
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break;
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case APM_CLIENT_EVENT_DATA_WRITE_DONE:
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spin_lock_irqsave(&prtd->lock, flags);
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prtd->pos += prtd->pcm_count;
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spin_unlock_irqrestore(&prtd->lock, flags);
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snd_pcm_period_elapsed(substream);
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if (prtd->state == Q6APM_STREAM_RUNNING)
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q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
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break;
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case APM_CLIENT_EVENT_DATA_READ_DONE:
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spin_lock_irqsave(&prtd->lock, flags);
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prtd->pos += prtd->pcm_count;
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spin_unlock_irqrestore(&prtd->lock, flags);
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snd_pcm_period_elapsed(substream);
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if (prtd->state == Q6APM_STREAM_RUNNING)
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q6apm_read(prtd->graph);
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break;
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default:
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break;
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}
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}
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static int q6apm_dai_prepare(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct q6apm_dai_rtd *prtd = runtime->private_data;
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struct audioreach_module_config cfg;
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struct device *dev = component->dev;
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struct q6apm_dai_data *pdata;
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int ret;
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pdata = snd_soc_component_get_drvdata(component);
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if (!pdata)
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return -EINVAL;
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if (!prtd || !prtd->graph) {
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dev_err(dev, "%s: private data null or audio client freed\n", __func__);
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return -EINVAL;
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}
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cfg.direction = substream->stream;
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cfg.sample_rate = runtime->rate;
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cfg.num_channels = runtime->channels;
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cfg.bit_width = prtd->bits_per_sample;
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if (prtd->state) {
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/* clear the previous setup if any */
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q6apm_graph_stop(prtd->graph);
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q6apm_unmap_memory_regions(prtd->graph, substream->stream);
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}
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prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
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prtd->pos = 0;
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/* rate and channels are sent to audio driver */
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ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
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if (ret < 0) {
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dev_err(dev, "%s: q6apm_open_write failed\n", __func__);
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return ret;
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}
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ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
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if (ret < 0)
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dev_err(dev, "%s: CMD Format block failed\n", __func__);
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ret = q6apm_map_memory_regions(prtd->graph, substream->stream, prtd->phys,
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(prtd->pcm_size / prtd->periods), prtd->periods);
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if (ret < 0) {
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dev_err(dev, "Audio Start: Buffer Allocation failed rc = %d\n", ret);
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return -ENOMEM;
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}
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ret = q6apm_graph_prepare(prtd->graph);
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if (ret) {
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dev_err(dev, "Failed to prepare Graph %d\n", ret);
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return ret;
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}
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ret = q6apm_graph_start(prtd->graph);
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if (ret) {
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dev_err(dev, "Failed to Start Graph %d\n", ret);
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return ret;
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}
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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int i;
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/* Queue the buffers for Capture ONLY after graph is started */
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for (i = 0; i < runtime->periods; i++)
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q6apm_read(prtd->graph);
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}
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/* Now that graph as been prepared and started update the internal state accordingly */
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prtd->state = Q6APM_STREAM_RUNNING;
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return 0;
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}
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static int q6apm_dai_trigger(struct snd_soc_component *component,
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struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct q6apm_dai_rtd *prtd = runtime->private_data;
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int ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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/* start writing buffers for playback only as we already queued capture buffers */
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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/* TODO support be handled via SoftPause Module */
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prtd->state = Q6APM_STREAM_STOPPED;
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break;
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static int q6apm_dai_open(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_prtd, 0);
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struct device *dev = component->dev;
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struct q6apm_dai_data *pdata;
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struct q6apm_dai_rtd *prtd;
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int graph_id, ret;
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graph_id = cpu_dai->driver->id;
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pdata = snd_soc_component_get_drvdata(component);
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if (!pdata) {
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dev_err(dev, "Drv data not found ..\n");
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return -EINVAL;
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}
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prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
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if (prtd == NULL)
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return -ENOMEM;
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spin_lock_init(&prtd->lock);
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prtd->substream = substream;
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prtd->graph = q6apm_graph_open(dev, (q6apm_cb)event_handler, prtd, graph_id);
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if (IS_ERR(prtd->graph)) {
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dev_err(dev, "%s: Could not allocate memory\n", __func__);
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ret = PTR_ERR(prtd->graph);
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goto err;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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runtime->hw = q6apm_dai_hardware_playback;
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else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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runtime->hw = q6apm_dai_hardware_capture;
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/* Ensure that buffer size is a multiple of period size */
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ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
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if (ret < 0) {
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dev_err(dev, "snd_pcm_hw_constraint_integer failed\n");
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goto err;
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
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BUFFER_BYTES_MIN, BUFFER_BYTES_MAX);
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if (ret < 0) {
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dev_err(dev, "constraint for buffer bytes min max ret = %d\n", ret);
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goto err;
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}
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}
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ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
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if (ret < 0) {
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dev_err(dev, "constraint for period bytes step ret = %d\n", ret);
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goto err;
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}
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ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
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if (ret < 0) {
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dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret);
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goto err;
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}
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runtime->private_data = prtd;
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runtime->dma_bytes = BUFFER_BYTES_MAX;
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if (pdata->sid < 0)
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prtd->phys = substream->dma_buffer.addr;
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else
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prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);
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return 0;
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err:
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kfree(prtd);
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return ret;
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}
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static int q6apm_dai_close(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct q6apm_dai_rtd *prtd = runtime->private_data;
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if (prtd->state) { /* only stop graph that is started */
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q6apm_graph_stop(prtd->graph);
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q6apm_unmap_memory_regions(prtd->graph, substream->stream);
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}
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q6apm_graph_close(prtd->graph);
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prtd->graph = NULL;
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kfree(prtd);
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runtime->private_data = NULL;
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return 0;
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}
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static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct q6apm_dai_rtd *prtd = runtime->private_data;
|
||
|
|
snd_pcm_uframes_t ptr;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&prtd->lock, flags);
|
||
|
|
if (prtd->pos == prtd->pcm_size)
|
||
|
|
prtd->pos = 0;
|
||
|
|
|
||
|
|
ptr = bytes_to_frames(runtime, prtd->pos);
|
||
|
|
spin_unlock_irqrestore(&prtd->lock, flags);
|
||
|
|
|
||
|
|
return ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int q6apm_dai_hw_params(struct snd_soc_component *component,
|
||
|
|
struct snd_pcm_substream *substream,
|
||
|
|
struct snd_pcm_hw_params *params)
|
||
|
|
{
|
||
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
|
struct q6apm_dai_rtd *prtd = runtime->private_data;
|
||
|
|
|
||
|
|
prtd->pcm_size = params_buffer_bytes(params);
|
||
|
|
prtd->periods = params_periods(params);
|
||
|
|
|
||
|
|
switch (params_format(params)) {
|
||
|
|
case SNDRV_PCM_FORMAT_S16_LE:
|
||
|
|
prtd->bits_per_sample = 16;
|
||
|
|
break;
|
||
|
|
case SNDRV_PCM_FORMAT_S24_LE:
|
||
|
|
prtd->bits_per_sample = 24;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int q6apm_dai_pcm_new(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd)
|
||
|
|
{
|
||
|
|
int size = BUFFER_BYTES_MAX;
|
||
|
|
|
||
|
|
return snd_pcm_set_fixed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, component->dev, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct snd_soc_component_driver q6apm_fe_dai_component = {
|
||
|
|
.name = DRV_NAME,
|
||
|
|
.open = q6apm_dai_open,
|
||
|
|
.close = q6apm_dai_close,
|
||
|
|
.prepare = q6apm_dai_prepare,
|
||
|
|
.pcm_construct = q6apm_dai_pcm_new,
|
||
|
|
.hw_params = q6apm_dai_hw_params,
|
||
|
|
.pointer = q6apm_dai_pointer,
|
||
|
|
.trigger = q6apm_dai_trigger,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int q6apm_dai_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
struct device_node *node = dev->of_node;
|
||
|
|
struct q6apm_dai_data *pdata;
|
||
|
|
struct of_phandle_args args;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
|
||
|
|
if (!pdata)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
rc = of_parse_phandle_with_fixed_args(node, "iommus", 1, 0, &args);
|
||
|
|
if (rc < 0)
|
||
|
|
pdata->sid = -1;
|
||
|
|
else
|
||
|
|
pdata->sid = args.args[0] & SID_MASK_DEFAULT;
|
||
|
|
|
||
|
|
dev_set_drvdata(dev, pdata);
|
||
|
|
|
||
|
|
return devm_snd_soc_register_component(dev, &q6apm_fe_dai_component, NULL, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_OF
|
||
|
|
static const struct of_device_id q6apm_dai_device_id[] = {
|
||
|
|
{ .compatible = "qcom,q6apm-dais" },
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, q6apm_dai_device_id);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static struct platform_driver q6apm_dai_platform_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "q6apm-dai",
|
||
|
|
.of_match_table = of_match_ptr(q6apm_dai_device_id),
|
||
|
|
},
|
||
|
|
.probe = q6apm_dai_probe,
|
||
|
|
};
|
||
|
|
module_platform_driver(q6apm_dai_platform_driver);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("Q6APM dai driver");
|
||
|
|
MODULE_LICENSE("GPL");
|