[alsa-devel] [PATCH v2 5/6] ASoC: jz4740: Use the generic dmaengine PCM driver
Lars-Peter Clausen
lars at metafoo.de
Thu May 30 18:25:04 CEST 2013
Since there is a dmaengine driver for the jz4740 DMA controller now we can use
the generic dmaengine PCM driver instead of a custom one.
Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
Acked-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
No changes since v1
---
sound/soc/jz4740/Kconfig | 1 +
sound/soc/jz4740/jz4740-i2s.c | 48 +++----
sound/soc/jz4740/jz4740-pcm.c | 310 ++----------------------------------------
sound/soc/jz4740/jz4740-pcm.h | 20 ---
4 files changed, 27 insertions(+), 352 deletions(-)
delete mode 100644 sound/soc/jz4740/jz4740-pcm.h
diff --git a/sound/soc/jz4740/Kconfig b/sound/soc/jz4740/Kconfig
index 5351cba..29f76af 100644
--- a/sound/soc/jz4740/Kconfig
+++ b/sound/soc/jz4740/Kconfig
@@ -1,6 +1,7 @@
config SND_JZ4740_SOC
tristate "SoC Audio for Ingenic JZ4740 SoC"
depends on MACH_JZ4740 && SND_SOC
+ select SND_SOC_GENERIC_DMAENGINE_PCM
help
Say Y or M if you want to add support for codecs attached to
the JZ4740 I2S interface. You will also need to select the audio
diff --git a/sound/soc/jz4740/jz4740-i2s.c b/sound/soc/jz4740/jz4740-i2s.c
index 4c849a4..47d3b4c 100644
--- a/sound/soc/jz4740/jz4740-i2s.c
+++ b/sound/soc/jz4740/jz4740-i2s.c
@@ -29,9 +29,12 @@
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
+#include <sound/dmaengine_pcm.h>
+
+#include <asm/mach-jz4740/dma.h>
#include "jz4740-i2s.h"
-#include "jz4740-pcm.h"
+
#define JZ_REG_AIC_CONF 0x00
#define JZ_REG_AIC_CTRL 0x04
@@ -89,8 +92,8 @@ struct jz4740_i2s {
struct clk *clk_aic;
struct clk *clk_i2s;
- struct jz4740_pcm_config pcm_config_playback;
- struct jz4740_pcm_config pcm_config_capture;
+ struct snd_dmaengine_dai_dma_data playback_dma_data;
+ struct snd_dmaengine_dai_dma_data capture_dma_data;
};
static inline uint32_t jz4740_i2s_read(const struct jz4740_i2s *i2s,
@@ -233,8 +236,6 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
- enum jz4740_dma_width dma_width;
- struct jz4740_pcm_config *pcm_config;
unsigned int sample_size;
uint32_t ctrl;
@@ -243,11 +244,9 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
sample_size = 0;
- dma_width = JZ4740_DMA_WIDTH_8BIT;
break;
case SNDRV_PCM_FORMAT_S16:
sample_size = 1;
- dma_width = JZ4740_DMA_WIDTH_16BIT;
break;
default:
return -EINVAL;
@@ -260,22 +259,13 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
ctrl |= JZ_AIC_CTRL_MONO_TO_STEREO;
else
ctrl &= ~JZ_AIC_CTRL_MONO_TO_STEREO;
-
- pcm_config = &i2s->pcm_config_playback;
- pcm_config->dma_config.dst_width = dma_width;
-
} else {
ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK;
ctrl |= sample_size << JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET;
-
- pcm_config = &i2s->pcm_config_capture;
- pcm_config->dma_config.src_width = dma_width;
}
jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
- snd_soc_dai_set_dma_data(dai, substream, pcm_config);
-
return 0;
}
@@ -342,25 +332,19 @@ static int jz4740_i2s_resume(struct snd_soc_dai *dai)
static void jz4740_i2c_init_pcm_config(struct jz4740_i2s *i2s)
{
- struct jz4740_dma_config *dma_config;
+ struct snd_dmaengine_dai_dma_data *dma_data;
/* Playback */
- dma_config = &i2s->pcm_config_playback.dma_config;
- dma_config->src_width = JZ4740_DMA_WIDTH_32BIT;
- dma_config->transfer_size = JZ4740_DMA_TRANSFER_SIZE_16BYTE;
- dma_config->request_type = JZ4740_DMA_TYPE_AIC_TRANSMIT;
- dma_config->flags = JZ4740_DMA_SRC_AUTOINC;
- dma_config->mode = JZ4740_DMA_MODE_SINGLE;
- i2s->pcm_config_playback.fifo_addr = i2s->phys_base + JZ_REG_AIC_FIFO;
+ dma_data = &i2s->playback_dma_data;
+ dma_data->maxburst = 16;
+ dma_data->slave_id = JZ4740_DMA_TYPE_AIC_TRANSMIT;
+ dma_data->addr = i2s->phys_base + JZ_REG_AIC_FIFO;
/* Capture */
- dma_config = &i2s->pcm_config_capture.dma_config;
- dma_config->dst_width = JZ4740_DMA_WIDTH_32BIT;
- dma_config->transfer_size = JZ4740_DMA_TRANSFER_SIZE_16BYTE;
- dma_config->request_type = JZ4740_DMA_TYPE_AIC_RECEIVE;
- dma_config->flags = JZ4740_DMA_DST_AUTOINC;
- dma_config->mode = JZ4740_DMA_MODE_SINGLE;
- i2s->pcm_config_capture.fifo_addr = i2s->phys_base + JZ_REG_AIC_FIFO;
+ dma_data = &i2s->capture_dma_data;
+ dma_data->maxburst = 16;
+ dma_data->slave_id = JZ4740_DMA_TYPE_AIC_RECEIVE;
+ dma_data->addr = i2s->phys_base + JZ_REG_AIC_FIFO;
}
static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai)
@@ -371,6 +355,8 @@ static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai)
clk_prepare_enable(i2s->clk_aic);
jz4740_i2c_init_pcm_config(i2s);
+ dai->playback_dma_data = &i2s->playback_dma_data;
+ dai->capture_dma_data = &i2s->capture_dma_data;
conf = (7 << JZ_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET) |
(8 << JZ_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET) |
diff --git a/sound/soc/jz4740/jz4740-pcm.c b/sound/soc/jz4740/jz4740-pcm.c
index 7100592..79fcade 100644
--- a/sound/soc/jz4740/jz4740-pcm.c
+++ b/sound/soc/jz4740/jz4740-pcm.c
@@ -19,38 +19,14 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
-#include <linux/dma-mapping.h>
+#include <sound/dmaengine_pcm.h>
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-
-#include <asm/mach-jz4740/dma.h>
-#include "jz4740-pcm.h"
-
-struct jz4740_runtime_data {
- unsigned long dma_period;
- dma_addr_t dma_start;
- dma_addr_t dma_pos;
- dma_addr_t dma_end;
-
- struct jz4740_dma_chan *dma;
-
- dma_addr_t fifo_addr;
-};
-
-/* identify hardware playback capabilities */
static const struct snd_pcm_hardware jz4740_pcm_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
-
- .rates = SNDRV_PCM_RATE_8000_48000,
- .channels_min = 1,
- .channels_max = 2,
.period_bytes_min = 16,
.period_bytes_max = 2 * PAGE_SIZE,
.periods_min = 2,
@@ -59,290 +35,22 @@ static const struct snd_pcm_hardware jz4740_pcm_hardware = {
.fifo_size = 32,
};
-static void jz4740_pcm_start_transfer(struct jz4740_runtime_data *prtd,
- struct snd_pcm_substream *substream)
-{
- unsigned long count;
-
- if (prtd->dma_pos == prtd->dma_end)
- prtd->dma_pos = prtd->dma_start;
-
- if (prtd->dma_pos + prtd->dma_period > prtd->dma_end)
- count = prtd->dma_end - prtd->dma_pos;
- else
- count = prtd->dma_period;
-
- jz4740_dma_disable(prtd->dma);
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- jz4740_dma_set_src_addr(prtd->dma, prtd->dma_pos);
- jz4740_dma_set_dst_addr(prtd->dma, prtd->fifo_addr);
- } else {
- jz4740_dma_set_src_addr(prtd->dma, prtd->fifo_addr);
- jz4740_dma_set_dst_addr(prtd->dma, prtd->dma_pos);
- }
-
- jz4740_dma_set_transfer_count(prtd->dma, count);
-
- prtd->dma_pos += count;
-
- jz4740_dma_enable(prtd->dma);
-}
-
-static void jz4740_pcm_dma_transfer_done(struct jz4740_dma_chan *dma, int err,
- void *dev_id)
-{
- struct snd_pcm_substream *substream = dev_id;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
-
- snd_pcm_period_elapsed(substream);
-
- jz4740_pcm_start_transfer(prtd, substream);
-}
-
-static int jz4740_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct jz4740_pcm_config *config;
-
- config = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
- if (!config)
- return 0;
-
- if (!prtd->dma) {
- if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- prtd->dma = jz4740_dma_request(substream, "PCM Capture");
- else
- prtd->dma = jz4740_dma_request(substream, "PCM Playback");
- }
-
- if (!prtd->dma)
- return -EBUSY;
-
- jz4740_dma_configure(prtd->dma, &config->dma_config);
- prtd->fifo_addr = config->fifo_addr;
-
- jz4740_dma_set_complete_cb(prtd->dma, jz4740_pcm_dma_transfer_done);
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- runtime->dma_bytes = params_buffer_bytes(params);
-
- prtd->dma_period = params_period_bytes(params);
- prtd->dma_start = runtime->dma_addr;
- prtd->dma_pos = prtd->dma_start;
- prtd->dma_end = prtd->dma_start + runtime->dma_bytes;
-
- return 0;
-}
-
-static int jz4740_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct jz4740_runtime_data *prtd = substream->runtime->private_data;
-
- snd_pcm_set_runtime_buffer(substream, NULL);
- if (prtd->dma) {
- jz4740_dma_free(prtd->dma);
- prtd->dma = NULL;
- }
-
- return 0;
-}
-
-static int jz4740_pcm_prepare(struct snd_pcm_substream *substream)
-{
- struct jz4740_runtime_data *prtd = substream->runtime->private_data;
-
- if (!prtd->dma)
- return -EBUSY;
-
- prtd->dma_pos = prtd->dma_start;
-
- return 0;
-}
-
-static int jz4740_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- jz4740_pcm_start_transfer(prtd, substream);
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- jz4740_dma_disable(prtd->dma);
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-static snd_pcm_uframes_t jz4740_pcm_pointer(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
- unsigned long byte_offset;
- snd_pcm_uframes_t offset;
- struct jz4740_dma_chan *dma = prtd->dma;
-
- /* prtd->dma_pos points to the end of the current transfer. So by
- * subtracting prdt->dma_start we get the offset to the end of the
- * current period in bytes. By subtracting the residue of the transfer
- * we get the current offset in bytes. */
- byte_offset = prtd->dma_pos - prtd->dma_start;
- byte_offset -= jz4740_dma_get_residue(dma);
-
- offset = bytes_to_frames(runtime, byte_offset);
- if (offset >= runtime->buffer_size)
- offset = 0;
-
- return offset;
-}
-
-static int jz4740_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd;
-
- prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
- if (prtd == NULL)
- return -ENOMEM;
-
- snd_soc_set_runtime_hwparams(substream, &jz4740_pcm_hardware);
-
- runtime->private_data = prtd;
-
- return 0;
-}
-
-static int jz4740_pcm_close(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct jz4740_runtime_data *prtd = runtime->private_data;
-
- kfree(prtd);
-
- return 0;
-}
-
-static int jz4740_pcm_mmap(struct snd_pcm_substream *substream,
- struct vm_area_struct *vma)
-{
- return remap_pfn_range(vma, vma->vm_start,
- substream->dma_buffer.addr >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start, vma->vm_page_prot);
-}
-
-static struct snd_pcm_ops jz4740_pcm_ops = {
- .open = jz4740_pcm_open,
- .close = jz4740_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = jz4740_pcm_hw_params,
- .hw_free = jz4740_pcm_hw_free,
- .prepare = jz4740_pcm_prepare,
- .trigger = jz4740_pcm_trigger,
- .pointer = jz4740_pcm_pointer,
- .mmap = jz4740_pcm_mmap,
-};
-
-static int jz4740_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
-{
- struct snd_pcm_substream *substream = pcm->streams[stream].substream;
- struct snd_dma_buffer *buf = &substream->dma_buffer;
- size_t size = jz4740_pcm_hardware.buffer_bytes_max;
-
- buf->dev.type = SNDRV_DMA_TYPE_DEV;
- buf->dev.dev = pcm->card->dev;
- buf->private_data = NULL;
-
- buf->area = dma_alloc_noncoherent(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
- if (!buf->area)
- return -ENOMEM;
-
- buf->bytes = size;
-
- return 0;
-}
-
-static void jz4740_pcm_free(struct snd_pcm *pcm)
-{
- struct snd_pcm_substream *substream;
- struct snd_dma_buffer *buf;
- int stream;
-
- for (stream = 0; stream < SNDRV_PCM_STREAM_LAST; ++stream) {
- substream = pcm->streams[stream].substream;
- if (!substream)
- continue;
-
- buf = &substream->dma_buffer;
- if (!buf->area)
- continue;
-
- dma_free_noncoherent(pcm->card->dev, buf->bytes, buf->area,
- buf->addr);
- buf->area = NULL;
- }
-}
-
-static u64 jz4740_pcm_dmamask = DMA_BIT_MASK(32);
-
-static int jz4740_pcm_new(struct snd_soc_pcm_runtime *rtd)
-{
- struct snd_card *card = rtd->card->snd_card;
- struct snd_pcm *pcm = rtd->pcm;
- int ret = 0;
-
- if (!card->dev->dma_mask)
- card->dev->dma_mask = &jz4740_pcm_dmamask;
-
- if (!card->dev->coherent_dma_mask)
- card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
-
- if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
- ret = jz4740_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_PLAYBACK);
- if (ret)
- goto err;
- }
-
- if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
- ret = jz4740_pcm_preallocate_dma_buffer(pcm,
- SNDRV_PCM_STREAM_CAPTURE);
- if (ret)
- goto err;
- }
-
-err:
- return ret;
-}
-
-static struct snd_soc_platform_driver jz4740_soc_platform = {
- .ops = &jz4740_pcm_ops,
- .pcm_new = jz4740_pcm_new,
- .pcm_free = jz4740_pcm_free,
+static const struct snd_dmaengine_pcm_config jz4740_dmaengine_pcm_config = {
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+ .pcm_hardware = &jz4740_pcm_hardware,
+ .prealloc_buffer_size = 256 * PAGE_SIZE,
};
static int jz4740_pcm_probe(struct platform_device *pdev)
{
- return snd_soc_register_platform(&pdev->dev, &jz4740_soc_platform);
+ return snd_dmaengine_pcm_register(&pdev->dev,
+ &jz4740_dmaengine_pcm_config,
+ SND_DMAENGINE_PCM_FLAG_COMPAT);
}
static int jz4740_pcm_remove(struct platform_device *pdev)
{
- snd_soc_unregister_platform(&pdev->dev);
+ snd_dmaengine_pcm_unregister(&pdev->dev);
return 0;
}
diff --git a/sound/soc/jz4740/jz4740-pcm.h b/sound/soc/jz4740/jz4740-pcm.h
deleted file mode 100644
index 1220cbb..0000000
--- a/sound/soc/jz4740/jz4740-pcm.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef _JZ4740_PCM_H
-#define _JZ4740_PCM_H
-
-#include <linux/dma-mapping.h>
-#include <asm/mach-jz4740/dma.h>
-
-
-struct jz4740_pcm_config {
- struct jz4740_dma_config dma_config;
- phys_addr_t fifo_addr;
-};
-
-#endif
--
1.8.2.1
More information about the Alsa-devel
mailing list