--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2019 Spreadtrum Communications Inc.
+
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/dma/sprd-dma.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/compress_driver.h>
+
+#include "sprd-pcm-dma.h"
+
+#define SPRD_COMPR_DMA_CHANS 2
+
+/* Default values if userspace does not set */
+#define SPRD_COMPR_MIN_FRAGMENT_SIZE SZ_8K
+#define SPRD_COMPR_MAX_FRAGMENT_SIZE SZ_128K
+#define SPRD_COMPR_MIN_NUM_FRAGMENTS 4
+#define SPRD_COMPR_MAX_NUM_FRAGMENTS 64
+
+/* DSP FIFO size */
+#define SPRD_COMPR_MCDT_EMPTY_WMK 0
+#define SPRD_COMPR_MCDT_FIFO_SIZE 512
+
+/* Stage 0 IRAM buffer size definition */
+#define SPRD_COMPR_IRAM_BUF_SIZE SZ_32K
+#define SPRD_COMPR_IRAM_INFO_SIZE (sizeof(struct sprd_compr_playinfo))
+#define SPRD_COMPR_IRAM_LINKLIST_SIZE (1024 - SPRD_COMPR_IRAM_INFO_SIZE)
+#define SPRD_COMPR_IRAM_SIZE (SPRD_COMPR_IRAM_BUF_SIZE + \
+ SPRD_COMPR_IRAM_INFO_SIZE + \
+ SPRD_COMPR_IRAM_LINKLIST_SIZE)
+
+/* Stage 1 DDR buffer size definition */
+#define SPRD_COMPR_AREA_BUF_SIZE SZ_2M
+#define SPRD_COMPR_AREA_LINKLIST_SIZE 1024
+#define SPRD_COMPR_AREA_SIZE (SPRD_COMPR_AREA_BUF_SIZE + \
+ SPRD_COMPR_AREA_LINKLIST_SIZE)
+
+struct sprd_compr_dma {
+ struct dma_chan *chan;
+ struct dma_async_tx_descriptor *desc;
+ dma_cookie_t cookie;
+ dma_addr_t phys;
+ void *virt;
+ int trans_len;
+};
+
+/*
+ * The Spreadtrum Audio compress offload mode will use 2-stage DMA transfer to
+ * save power. That means we can request 2 dma channels, one for source channel,
+ * and another one for destination channel. Once the source channel's transaction
+ * is done, it will trigger the destination channel's transaction automatically
+ * by hardware signal.
+ *
+ * For 2-stage DMA transfer, we can allocate 2 buffers: IRAM buffer (always
+ * power-on) and DDR buffer. The source channel will transfer data from IRAM
+ * buffer to the DSP fifo to decoding/encoding, once IRAM buffer is empty by
+ * transferring done, the destination channel will start to transfer data from
+ * DDR buffer to IRAM buffer.
+ *
+ * Since the DSP fifo is only 512B, IRAM buffer is allocated by 32K, and DDR
+ * buffer is larger to 2M. That means only the IRAM 32k data is transferred
+ * done, we can wake up the AP system to transfer data from DDR to IRAM, and
+ * other time the AP system can be suspended to save power.
+ */
+struct sprd_compr_stream {
+ struct snd_compr_stream *cstream;
+ struct sprd_compr_ops *compr_ops;
+ struct sprd_compr_dma dma[SPRD_COMPR_DMA_CHANS];
+
+ /* DMA engine channel number */
+ int num_channels;
+
+ /* Stage 0 IRAM buffer */
+ struct snd_dma_buffer iram_buffer;
+ /* Stage 1 DDR buffer */
+ struct snd_dma_buffer compr_buffer;
+
+ /* DSP play information IRAM buffer */
+ dma_addr_t info_phys;
+ void *info_area;
+ int info_size;
+
+ /* Data size copied to IRAM buffer */
+ int copied_total;
+ /* Total received data size from userspace */
+ int received_total;
+ /* Stage 0 IRAM buffer received data size */
+ int received_stage0;
+ /* Stage 1 DDR buffer received data size */
+ int received_stage1;
+ /* Stage 1 DDR buffer pointer */
+ int stage1_pointer;
+};
+
+static int sprd_platform_compr_trigger(struct snd_compr_stream *cstream,
+ int cmd);
+
+static void sprd_platform_compr_drain_notify(void *arg)
+{
+ struct snd_compr_stream *cstream = arg;
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct sprd_compr_stream *stream = runtime->private_data;
+
+ memset(stream->info_area, 0, sizeof(struct sprd_compr_playinfo));
+
+ if (cstream)
+ snd_compr_drain_notify(cstream);
+}
+
+static void sprd_platform_compr_dma_complete(void *data)
+{
+ struct snd_compr_stream *cstream = data;
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct sprd_compr_stream *stream = runtime->private_data;
+ struct sprd_compr_dma *dma = &stream->dma[1];
+
+ /* Update data size copied to IRAM buffer */
+ stream->copied_total += dma->trans_len;
+ if (stream->copied_total > stream->received_total)
+ stream->copied_total = stream->received_total;
+
+ snd_compr_fragment_elapsed(cstream);
+}
+
+static int sprd_platform_compr_dma_config(struct snd_compr_stream *cstream,
+ struct snd_compr_params *params,
+ int channel)
+{
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct sprd_compr_stream *stream = runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_component *component =
+ snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+ struct device *dev = component->dev;
+ struct sprd_compr_data *data = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+ struct sprd_pcm_dma_params *dma_params = data->dma_params;
+ struct sprd_compr_dma *dma = &stream->dma[channel];
+ struct dma_slave_config config = { };
+ struct sprd_dma_linklist link = { };
+ enum dma_transfer_direction dir;
+ struct scatterlist *sg, *sgt;
+ enum dma_slave_buswidth bus_width;
+ int period, period_cnt, sg_num = 2;
+ dma_addr_t src_addr, dst_addr;
+ unsigned long flags;
+ int ret, j;
+
+ if (!dma_params) {
+ dev_err(dev, "no dma parameters setting\n");
+ return -EINVAL;
+ }
+
+ dma->chan = dma_request_slave_channel(dev,
+ dma_params->chan_name[channel]);
+ if (!dma->chan) {
+ dev_err(dev, "failed to request dma channel\n");
+ return -ENODEV;
+ }
+
+ sgt = sg = devm_kcalloc(dev, sg_num, sizeof(*sg), GFP_KERNEL);
+ if (!sg) {
+ ret = -ENOMEM;
+ goto sg_err;
+ }
+
+ switch (channel) {
+ case 0:
+ bus_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ period = (SPRD_COMPR_MCDT_FIFO_SIZE - SPRD_COMPR_MCDT_EMPTY_WMK) * 4;
+ period_cnt = params->buffer.fragment_size / period;
+ src_addr = stream->iram_buffer.addr;
+ dst_addr = dma_params->dev_phys[channel];
+ flags = SPRD_DMA_FLAGS(SPRD_DMA_SRC_CHN1,
+ SPRD_DMA_TRANS_DONE_TRG,
+ SPRD_DMA_FRAG_REQ,
+ SPRD_DMA_TRANS_INT);
+ break;
+
+ case 1:
+ bus_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ period = params->buffer.fragment_size;
+ period_cnt = params->buffer.fragments;
+ src_addr = stream->compr_buffer.addr;
+ dst_addr = stream->iram_buffer.addr;
+ flags = SPRD_DMA_FLAGS(SPRD_DMA_DST_CHN1,
+ SPRD_DMA_TRANS_DONE_TRG,
+ SPRD_DMA_FRAG_REQ,
+ SPRD_DMA_TRANS_INT);
+ break;
+
+ default:
+ ret = -EINVAL;
+ goto config_err;
+ }
+
+ dma->trans_len = period * period_cnt;
+
+ config.src_maxburst = period;
+ config.src_addr_width = bus_width;
+ config.dst_addr_width = bus_width;
+ if (cstream->direction == SND_COMPRESS_PLAYBACK) {
+ config.src_addr = src_addr;
+ config.dst_addr = dst_addr;
+ dir = DMA_MEM_TO_DEV;
+ } else {
+ config.src_addr = dst_addr;
+ config.dst_addr = src_addr;
+ dir = DMA_DEV_TO_MEM;
+ }
+
+ sg_init_table(sgt, sg_num);
+ for (j = 0; j < sg_num; j++, sgt++) {
+ sg_dma_len(sgt) = dma->trans_len;
+ sg_dma_address(sgt) = dst_addr;
+ }
+
+ /*
+ * Configure the link-list address for the DMA engine link-list
+ * mode.
+ */
+ link.virt_addr = (unsigned long)dma->virt;
+ link.phy_addr = dma->phys;
+
+ ret = dmaengine_slave_config(dma->chan, &config);
+ if (ret) {
+ dev_err(dev,
+ "failed to set slave configuration: %d\n", ret);
+ goto config_err;
+ }
+
+ /*
+ * We configure the DMA request mode, interrupt mode, channel
+ * mode and channel trigger mode by the flags.
+ */
+ dma->desc = dma->chan->device->device_prep_slave_sg(dma->chan, sg,
+ sg_num, dir,
+ flags, &link);
+ if (!dma->desc) {
+ dev_err(dev, "failed to prepare slave sg\n");
+ ret = -ENOMEM;
+ goto config_err;
+ }
+
+ /* Only channel 1 transfer can wake up the AP system. */
+ if (!params->no_wake_mode && channel == 1) {
+ dma->desc->callback = sprd_platform_compr_dma_complete;
+ dma->desc->callback_param = cstream;
+ }
+
+ devm_kfree(dev, sg);
+
+ return 0;
+
+config_err:
+ devm_kfree(dev, sg);
+sg_err:
+ dma_release_channel(dma->chan);
+ return ret;
+}
+
+static int sprd_platform_compr_set_params(struct snd_compr_stream *cstream,
+ struct snd_compr_params *params)
+{
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct sprd_compr_stream *stream = runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_component *component =
+ snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+ struct device *dev = component->dev;
+ struct sprd_compr_params compr_params = { };
+ int ret;
+
+ /*
+ * Configure the DMA engine 2-stage transfer mode. Channel 1 set as the
+ * destination channel, and channel 0 set as the source channel, that
+ * means once the source channel's transaction is done, it will trigger
+ * the destination channel's transaction automatically.
+ */
+ ret = sprd_platform_compr_dma_config(cstream, params, 1);
+ if (ret) {
+ dev_err(dev, "faied to config stage 1 DMA: %d\n", ret);
+ return ret;
+ }
+
+ ret = sprd_platform_compr_dma_config(cstream, params, 0);
+ if (ret) {
+ dev_err(dev, "faied to config stage 0 DMA: %d\n", ret);
+ goto config_err;
+ }
+
+ compr_params.direction = cstream->direction;
+ compr_params.sample_rate = params->codec.sample_rate;
+ compr_params.channels = stream->num_channels;
+ compr_params.info_phys = stream->info_phys;
+ compr_params.info_size = stream->info_size;
+ compr_params.rate = params->codec.bit_rate;
+ compr_params.format = params->codec.id;
+
+ ret = stream->compr_ops->set_params(cstream->direction, &compr_params);
+ if (ret) {
+ dev_err(dev, "failed to set parameters: %d\n", ret);
+ goto params_err;
+ }
+
+ return 0;
+
+params_err:
+ dma_release_channel(stream->dma[0].chan);
+config_err:
+ dma_release_channel(stream->dma[1].chan);
+ return ret;
+}
+
+static int sprd_platform_compr_open(struct snd_compr_stream *cstream)
+{
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_component *component =
+ snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+ struct device *dev = component->dev;
+ struct sprd_compr_data *data = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+ struct sprd_compr_stream *stream;
+ struct sprd_compr_callback cb;
+ int stream_id = cstream->direction, ret;
+
+ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+
+ stream = devm_kzalloc(dev, sizeof(*stream), GFP_KERNEL);
+ if (!stream)
+ return -ENOMEM;
+
+ stream->cstream = cstream;
+ stream->num_channels = 2;
+ stream->compr_ops = data->ops;
+
+ /*
+ * Allocate the stage 0 IRAM buffer size, including the DMA 0
+ * link-list size and play information of DSP address size.
+ */
+ ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_IRAM, dev,
+ SPRD_COMPR_IRAM_SIZE, &stream->iram_buffer);
+ if (ret < 0)
+ goto err_iram;
+
+ /* Use to save link-list configuration for DMA 0. */
+ stream->dma[0].virt = stream->iram_buffer.area + SPRD_COMPR_IRAM_SIZE;
+ stream->dma[0].phys = stream->iram_buffer.addr + SPRD_COMPR_IRAM_SIZE;
+
+ /* Use to update the current data offset of DSP. */
+ stream->info_phys = stream->iram_buffer.addr + SPRD_COMPR_IRAM_SIZE +
+ SPRD_COMPR_IRAM_LINKLIST_SIZE;
+ stream->info_area = stream->iram_buffer.area + SPRD_COMPR_IRAM_SIZE +
+ SPRD_COMPR_IRAM_LINKLIST_SIZE;
+ stream->info_size = SPRD_COMPR_IRAM_INFO_SIZE;
+
+ /*
+ * Allocate the stage 1 DDR buffer size, including the DMA 1 link-list
+ * size.
+ */
+ ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev,
+ SPRD_COMPR_AREA_SIZE, &stream->compr_buffer);
+ if (ret < 0)
+ goto err_compr;
+
+ /* Use to save link-list configuration for DMA 1. */
+ stream->dma[1].virt = stream->compr_buffer.area + SPRD_COMPR_AREA_SIZE;
+ stream->dma[1].phys = stream->compr_buffer.addr + SPRD_COMPR_AREA_SIZE;
+
+ cb.drain_notify = sprd_platform_compr_drain_notify;
+ cb.drain_data = cstream;
+ ret = stream->compr_ops->open(stream_id, &cb);
+ if (ret) {
+ dev_err(dev, "failed to open compress platform: %d\n", ret);
+ goto err_open;
+ }
+
+ runtime->private_data = stream;
+ return 0;
+
+err_open:
+ snd_dma_free_pages(&stream->compr_buffer);
+err_compr:
+ snd_dma_free_pages(&stream->iram_buffer);
+err_iram:
+ devm_kfree(dev, stream);
+
+ return ret;
+}
+
+static int sprd_platform_compr_free(struct snd_compr_stream *cstream)
+{
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct sprd_compr_stream *stream = runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_component *component =
+ snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+ struct device *dev = component->dev;
+ int stream_id = cstream->direction, i;
+
+ for (i = 0; i < stream->num_channels; i++) {
+ struct sprd_compr_dma *dma = &stream->dma[i];
+
+ if (dma->chan) {
+ dma_release_channel(dma->chan);
+ dma->chan = NULL;
+ }
+ }
+
+ snd_dma_free_pages(&stream->compr_buffer);
+ snd_dma_free_pages(&stream->iram_buffer);
+
+ stream->compr_ops->close(stream_id);
+
+ devm_kfree(dev, stream);
+ return 0;
+}
+
+static int sprd_platform_compr_trigger(struct snd_compr_stream *cstream,
+ int cmd)
+{
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct sprd_compr_stream *stream = runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_component *component =
+ snd_soc_rtdcom_lookup(rtd, DRV_NAME);
+ struct device *dev = component->dev;
+ int channels = stream->num_channels, ret = 0, i;
+ int stream_id = cstream->direction;
+
+ if (cstream->direction != SND_COMPRESS_PLAYBACK) {
+ dev_err(dev, "unsupported compress direction\n");
+ return -EINVAL;
+ }
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ for (i = channels - 1; i >= 0; i--) {
+ struct sprd_compr_dma *dma = &stream->dma[i];
+
+ if (!dma->desc)
+ continue;
+
+ dma->cookie = dmaengine_submit(dma->desc);
+ ret = dma_submit_error(dma->cookie);
+ if (ret) {
+ dev_err(dev, "failed to submit request: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ for (i = channels - 1; i >= 0; i--) {
+ struct sprd_compr_dma *dma = &stream->dma[i];
+
+ if (dma->chan)
+ dma_async_issue_pending(dma->chan);
+ }
+
+ ret = stream->compr_ops->start(stream_id);
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ for (i = channels - 1; i >= 0; i--) {
+ struct sprd_compr_dma *dma = &stream->dma[i];
+
+ if (dma->chan)
+ dmaengine_terminate_async(dma->chan);
+ }
+
+ stream->copied_total = 0;
+ stream->stage1_pointer = 0;
+ stream->received_total = 0;
+ stream->received_stage0 = 0;
+ stream->received_stage1 = 0;
+
+ ret = stream->compr_ops->stop(stream_id);
+ break;
+
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ for (i = channels - 1; i >= 0; i--) {
+ struct sprd_compr_dma *dma = &stream->dma[i];
+
+ if (dma->chan)
+ dmaengine_pause(dma->chan);
+ }
+
+ ret = stream->compr_ops->pause(stream_id);
+ break;
+
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ for (i = channels - 1; i >= 0; i--) {
+ struct sprd_compr_dma *dma = &stream->dma[i];
+
+ if (dma->chan)
+ dmaengine_resume(dma->chan);
+ }
+
+ ret = stream->compr_ops->pause_release(stream_id);
+ break;
+
+ case SND_COMPR_TRIGGER_PARTIAL_DRAIN:
+ case SND_COMPR_TRIGGER_DRAIN:
+ ret = stream->compr_ops->drain(stream->received_total);
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int sprd_platform_compr_pointer(struct snd_compr_stream *cstream,
+ struct snd_compr_tstamp *tstamp)
+{
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct sprd_compr_stream *stream = runtime->private_data;
+ struct sprd_compr_playinfo *info =
+ (struct sprd_compr_playinfo *)stream->info_area;
+
+ tstamp->copied_total = stream->copied_total;
+ tstamp->pcm_io_frames = info->current_data_offset;
+
+ return 0;
+}
+
+static int sprd_platform_compr_copy(struct snd_compr_stream *cstream,
+ char __user *buf, size_t count)
+{
+ struct snd_compr_runtime *runtime = cstream->runtime;
+ struct sprd_compr_stream *stream = runtime->private_data;
+ int avail_bytes, data_count = count;
+ void *dst;
+
+ /*
+ * We usually set fragment size as 32K, and the stage 0 IRAM buffer
+ * size is 32K too. So if now the received data size of the stage 0
+ * IRAM buffer is less than 32K, that means we have some available
+ * spaces for the stage 0 IRAM buffer.
+ */
+ if (stream->received_stage0 < runtime->fragment_size) {
+ avail_bytes = runtime->fragment_size - stream->received_stage0;
+ dst = stream->iram_buffer.area + stream->received_stage0;
+
+ if (avail_bytes >= data_count) {
+ /*
+ * Copy data to the stage 0 IRAM buffer directly if
+ * spaces are enough.
+ */
+ if (copy_from_user(dst, buf, data_count))
+ return -EFAULT;
+
+ stream->received_stage0 += data_count;
+ stream->copied_total += data_count;
+ goto copy_done;
+ } else {
+ /*
+ * If the data count is larger than the available spaces
+ * of the the stage 0 IRAM buffer, we should copy one
+ * partial data to the stage 0 IRAM buffer, and copy
+ * the left to the stage 1 DDR buffer.
+ */
+ if (copy_from_user(dst, buf, avail_bytes))
+ return -EFAULT;
+
+ data_count -= avail_bytes;
+ stream->received_stage0 += avail_bytes;
+ stream->copied_total += avail_bytes;
+ buf += avail_bytes;
+ }
+ }
+
+ /*
+ * Copy data to the stage 1 DDR buffer if no spaces for the stage 0 IRAM
+ * buffer.
+ */
+ dst = stream->compr_buffer.area + stream->stage1_pointer;
+ if (data_count < stream->compr_buffer.bytes - stream->stage1_pointer) {
+ if (copy_from_user(dst, buf, data_count))
+ return -EFAULT;
+
+ stream->stage1_pointer += data_count;
+ } else {
+ avail_bytes = stream->compr_buffer.bytes - stream->stage1_pointer;
+
+ if (copy_from_user(dst, buf, avail_bytes))
+ return -EFAULT;
+
+ if (copy_from_user(stream->compr_buffer.area, buf + avail_bytes,
+ data_count - avail_bytes))
+ return -EFAULT;
+
+ stream->stage1_pointer = data_count - avail_bytes;
+ }
+
+ stream->received_stage1 += data_count;
+
+copy_done:
+ /* Update the copied data size. */
+ stream->received_total += count;
+ return count;
+}
+
+static int sprd_platform_compr_get_caps(struct snd_compr_stream *cstream,
+ struct snd_compr_caps *caps)
+{
+ caps->direction = cstream->direction;
+ caps->min_fragment_size = SPRD_COMPR_MIN_FRAGMENT_SIZE;
+ caps->max_fragment_size = SPRD_COMPR_MAX_FRAGMENT_SIZE;
+ caps->min_fragments = SPRD_COMPR_MIN_NUM_FRAGMENTS;
+ caps->max_fragments = SPRD_COMPR_MAX_NUM_FRAGMENTS;
+ caps->num_codecs = 2;
+ caps->codecs[0] = SND_AUDIOCODEC_MP3;
+ caps->codecs[1] = SND_AUDIOCODEC_AAC;
+
+ return 0;
+}
+
+static int
+sprd_platform_compr_get_codec_caps(struct snd_compr_stream *cstream,
+ struct snd_compr_codec_caps *codec)
+{
+ switch (codec->codec) {
+ case SND_AUDIOCODEC_MP3:
+ codec->num_descriptors = 2;
+ codec->descriptor[0].max_ch = 2;
+ codec->descriptor[0].bit_rate[0] = 320;
+ codec->descriptor[0].bit_rate[1] = 128;
+ codec->descriptor[0].num_bitrates = 2;
+ codec->descriptor[0].profiles = 0;
+ codec->descriptor[0].modes = SND_AUDIOCHANMODE_MP3_STEREO;
+ codec->descriptor[0].formats = 0;
+ break;
+
+ case SND_AUDIOCODEC_AAC:
+ codec->num_descriptors = 2;
+ codec->descriptor[1].max_ch = 2;
+ codec->descriptor[1].bit_rate[0] = 320;
+ codec->descriptor[1].bit_rate[1] = 128;
+ codec->descriptor[1].num_bitrates = 2;
+ codec->descriptor[1].profiles = 0;
+ codec->descriptor[1].modes = 0;
+ codec->descriptor[1].formats = 0;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+const struct snd_compr_ops sprd_platform_compr_ops = {
+ .open = sprd_platform_compr_open,
+ .free = sprd_platform_compr_free,
+ .set_params = sprd_platform_compr_set_params,
+ .trigger = sprd_platform_compr_trigger,
+ .pointer = sprd_platform_compr_pointer,
+ .copy = sprd_platform_compr_copy,
+ .get_caps = sprd_platform_compr_get_caps,
+ .get_codec_caps = sprd_platform_compr_get_codec_caps,
+};
+
+MODULE_DESCRIPTION("Spreadtrum ASoC Compress Platform Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:compress-platform");
projects / openwrt / staging / blogic.git / commitdiff