--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2021, Linaro Limited
+
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/pcm.h>
+#include <asm/dma.h>
+#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
+#include <sound/pcm_params.h>
+#include "q6apm.h"
+
+#define DRV_NAME "q6apm-dai"
+
+#define PLAYBACK_MIN_NUM_PERIODS 2
+#define PLAYBACK_MAX_NUM_PERIODS 8
+#define PLAYBACK_MAX_PERIOD_SIZE 65536
+#define PLAYBACK_MIN_PERIOD_SIZE 128
+#define CAPTURE_MIN_NUM_PERIODS 2
+#define CAPTURE_MAX_NUM_PERIODS 8
+#define CAPTURE_MAX_PERIOD_SIZE 4096
+#define CAPTURE_MIN_PERIOD_SIZE 320
+#define BUFFER_BYTES_MAX (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE)
+#define BUFFER_BYTES_MIN (PLAYBACK_MIN_NUM_PERIODS * PLAYBACK_MIN_PERIOD_SIZE)
+#define SID_MASK_DEFAULT 0xF
+
+enum stream_state {
+ Q6APM_STREAM_IDLE = 0,
+ Q6APM_STREAM_STOPPED,
+ Q6APM_STREAM_RUNNING,
+};
+
+struct q6apm_dai_rtd {
+ struct snd_pcm_substream *substream;
+ struct snd_compr_stream *cstream;
+ struct snd_compr_params codec_param;
+ struct snd_dma_buffer dma_buffer;
+ phys_addr_t phys;
+ unsigned int pcm_size;
+ unsigned int pcm_count;
+ unsigned int pos; /* Buffer position */
+ unsigned int periods;
+ unsigned int bytes_sent;
+ unsigned int bytes_received;
+ unsigned int copied_total;
+ uint16_t bits_per_sample;
+ uint16_t source; /* Encoding source bit mask */
+ uint16_t session_id;
+ enum stream_state state;
+ struct q6apm_graph *graph;
+};
+
+struct q6apm_dai_data {
+ long long sid;
+};
+
+static struct snd_pcm_hardware q6apm_dai_hardware_capture = {
+ .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ 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_FMTBIT_S24_LE),
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 4,
+ .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
+ .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
+ .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
+ .periods_min = CAPTURE_MIN_NUM_PERIODS,
+ .periods_max = CAPTURE_MAX_NUM_PERIODS,
+ .fifo_size = 0,
+};
+
+static struct snd_pcm_hardware q6apm_dai_hardware_playback = {
+ .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ 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_FMTBIT_S24_LE),
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .channels_min = 2,
+ .channels_max = 8,
+ .buffer_bytes_max = (PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE),
+ .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
+ .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
+ .periods_min = PLAYBACK_MIN_NUM_PERIODS,
+ .periods_max = PLAYBACK_MAX_NUM_PERIODS,
+ .fifo_size = 0,
+};
+
+static void event_handler(uint32_t opcode, uint32_t token, uint32_t *payload, void *priv)
+{
+ struct q6apm_dai_rtd *prtd = priv;
+ struct snd_pcm_substream *substream = prtd->substream;
+
+ switch (opcode) {
+ case APM_CLIENT_EVENT_CMD_EOS_DONE:
+ prtd->state = Q6APM_STREAM_STOPPED;
+ break;
+ case APM_CLIENT_EVENT_DATA_WRITE_DONE:
+ prtd->pos += prtd->pcm_count;
+ snd_pcm_period_elapsed(substream);
+ if (prtd->state == Q6APM_STREAM_RUNNING)
+ q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
+
+ break;
+ case APM_CLIENT_EVENT_DATA_READ_DONE:
+ prtd->pos += prtd->pcm_count;
+ snd_pcm_period_elapsed(substream);
+ if (prtd->state == Q6APM_STREAM_RUNNING)
+ q6apm_read(prtd->graph);
+
+ break;
+ default:
+ break;
+ }
+}
+
+static int q6apm_dai_prepare(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct q6apm_dai_rtd *prtd = runtime->private_data;
+ struct audioreach_module_config cfg;
+ struct device *dev = component->dev;
+ struct q6apm_dai_data *pdata;
+ int ret;
+
+ pdata = snd_soc_component_get_drvdata(component);
+ if (!pdata)
+ return -EINVAL;
+
+ if (!prtd || !prtd->graph) {
+ dev_err(dev, "%s: private data null or audio client freed\n", __func__);
+ return -EINVAL;
+ }
+
+ cfg.direction = substream->stream;
+ cfg.sample_rate = runtime->rate;
+ cfg.num_channels = runtime->channels;
+ cfg.bit_width = prtd->bits_per_sample;
+
+ prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
+ prtd->pos = 0;
+ /* rate and channels are sent to audio driver */
+ ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
+ if (ret < 0) {
+ dev_err(dev, "%s: q6apm_open_write failed\n", __func__);
+ return ret;
+ }
+
+ ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
+ if (ret < 0)
+ dev_err(dev, "%s: CMD Format block failed\n", __func__);
+
+ ret = q6apm_map_memory_regions(prtd->graph, substream->stream, prtd->phys,
+ (prtd->pcm_size / prtd->periods), prtd->periods);
+
+ if (ret < 0) {
+ dev_err(dev, "Audio Start: Buffer Allocation failed rc = %d\n", ret);
+ return -ENOMEM;
+ }
+
+ ret = q6apm_graph_prepare(prtd->graph);
+ if (ret) {
+ dev_err(dev, "Failed to prepare Graph %d\n", ret);
+ return ret;
+ }
+
+ ret = q6apm_graph_start(prtd->graph);
+ if (ret) {
+ dev_err(dev, "Failed to Start Graph %d\n", ret);
+ return ret;
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ int i;
+ /* Queue the buffers for Capture ONLY after graph is started */
+ for (i = 0; i < runtime->periods; i++)
+ q6apm_read(prtd->graph);
+
+ }
+
+ /* Now that graph as been prepared and started update the internal state accordingly */
+ prtd->state = Q6APM_STREAM_RUNNING;
+
+ return 0;
+}
+
+static int q6apm_dai_trigger(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct q6apm_dai_rtd *prtd = runtime->private_data;
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ /* start writing buffers for playback only as we already queued capture buffers */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, 0);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ /* TODO support be handled via SoftPause Module */
+ prtd->state = Q6APM_STREAM_STOPPED;
+ break;
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int q6apm_dai_open(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_prtd, 0);
+ struct device *dev = component->dev;
+ struct q6apm_dai_data *pdata;
+ struct q6apm_dai_rtd *prtd;
+ int graph_id, ret;
+
+ graph_id = cpu_dai->driver->id;
+
+ pdata = snd_soc_component_get_drvdata(component);
+ if (!pdata) {
+ dev_err(dev, "Drv data not found ..\n");
+ return -EINVAL;
+ }
+
+ prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
+ if (prtd == NULL)
+ return -ENOMEM;
+
+ prtd->substream = substream;
+ prtd->graph = q6apm_graph_open(dev, (q6apm_cb)event_handler, prtd, graph_id);
+ if (IS_ERR(prtd->graph)) {
+ dev_err(dev, "%s: Could not allocate memory\n", __func__);
+ ret = PTR_ERR(prtd->graph);
+ goto err;
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ runtime->hw = q6apm_dai_hardware_playback;
+ else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ runtime->hw = q6apm_dai_hardware_capture;
+
+ /* Ensure that buffer size is a multiple of period size */
+ ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0) {
+ dev_err(dev, "snd_pcm_hw_constraint_integer failed\n");
+ goto err;
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ret = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+ BUFFER_BYTES_MIN, BUFFER_BYTES_MAX);
+ if (ret < 0) {
+ dev_err(dev, "constraint for buffer bytes min max ret = %d\n", ret);
+ goto err;
+ }
+ }
+
+ ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
+ if (ret < 0) {
+ dev_err(dev, "constraint for period bytes step ret = %d\n", ret);
+ goto err;
+ }
+
+ ret = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
+ if (ret < 0) {
+ dev_err(dev, "constraint for buffer bytes step ret = %d\n", ret);
+ goto err;
+ }
+
+ runtime->private_data = prtd;
+ runtime->dma_bytes = BUFFER_BYTES_MAX;
+ if (pdata->sid < 0)
+ prtd->phys = substream->dma_buffer.addr;
+ else
+ prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);
+
+ return 0;
+err:
+ kfree(prtd);
+
+ return ret;
+}
+
+static int q6apm_dai_close(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct q6apm_dai_rtd *prtd = runtime->private_data;
+
+ q6apm_graph_stop(prtd->graph);
+ q6apm_unmap_memory_regions(prtd->graph, substream->stream);
+ q6apm_graph_close(prtd->graph);
+ prtd->graph = NULL;
+ kfree(prtd);
+ runtime->private_data = NULL;
+
+ return 0;
+}
+
+static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct q6apm_dai_rtd *prtd = runtime->private_data;
+
+ if (prtd->pos == prtd->pcm_size)
+ prtd->pos = 0;
+
+ return bytes_to_frames(runtime, prtd->pos);
+}
+
+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");
projects / platform / kernel / linux-starfive.git / commitdiff