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https://github.com/edk2-porting/linux-next.git
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ASoC: jz4740: Use the generic dmaengine PCM driver
Now that there is a dmaengine driver for the jz4740 DMA core we can use the generic dmaengine PCM driver. This allows us to remove the custom jz4740-pcm code completely. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Lars-Peter Clausen
Mark Brown
parent
b84c9ce809
commit
0406a40a09
@ -1,6 +1,7 @@
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config SND_JZ4740_SOC
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tristate "SoC Audio for Ingenic JZ4740 SoC"
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depends on MACH_JZ4740 && SND_SOC
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select SND_SOC_GENERIC_DMAENGINE_PCM
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help
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Say Y or M if you want to add support for codecs attached to
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the JZ4740 I2S interface. You will also need to select the audio
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@ -29,9 +29,11 @@
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include <sound/dmaengine_pcm.h>
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#include <asm/mach-jz4740/dma.h>
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#include "jz4740-i2s.h"
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#include "jz4740-pcm.h"
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#define JZ_REG_AIC_CONF 0x00
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#define JZ_REG_AIC_CTRL 0x04
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@ -89,8 +91,8 @@ struct jz4740_i2s {
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struct clk *clk_aic;
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struct clk *clk_i2s;
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struct jz4740_pcm_config pcm_config_playback;
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struct jz4740_pcm_config pcm_config_capture;
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struct snd_dmaengine_dai_dma_data playback_dma_data;
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struct snd_dmaengine_dai_dma_data capture_dma_data;
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};
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static inline uint32_t jz4740_i2s_read(const struct jz4740_i2s *i2s,
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@ -233,8 +235,6 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
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{
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struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai);
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enum jz4740_dma_width dma_width;
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struct jz4740_pcm_config *pcm_config;
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unsigned int sample_size;
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uint32_t ctrl;
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@ -243,11 +243,9 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S8:
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sample_size = 0;
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dma_width = JZ4740_DMA_WIDTH_8BIT;
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break;
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case SNDRV_PCM_FORMAT_S16:
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sample_size = 1;
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dma_width = JZ4740_DMA_WIDTH_16BIT;
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break;
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default:
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return -EINVAL;
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@ -260,22 +258,13 @@ static int jz4740_i2s_hw_params(struct snd_pcm_substream *substream,
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ctrl |= JZ_AIC_CTRL_MONO_TO_STEREO;
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else
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ctrl &= ~JZ_AIC_CTRL_MONO_TO_STEREO;
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pcm_config = &i2s->pcm_config_playback;
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pcm_config->dma_config.dst_width = dma_width;
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} else {
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ctrl &= ~JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_MASK;
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ctrl |= sample_size << JZ_AIC_CTRL_INPUT_SAMPLE_SIZE_OFFSET;
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pcm_config = &i2s->pcm_config_capture;
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pcm_config->dma_config.src_width = dma_width;
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}
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jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl);
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snd_soc_dai_set_dma_data(dai, substream, pcm_config);
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return 0;
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}
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@ -342,25 +331,19 @@ static int jz4740_i2s_resume(struct snd_soc_dai *dai)
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static void jz4740_i2c_init_pcm_config(struct jz4740_i2s *i2s)
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{
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struct jz4740_dma_config *dma_config;
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struct snd_dmaengine_dai_dma_data *dma_data;
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/* Playback */
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dma_config = &i2s->pcm_config_playback.dma_config;
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dma_config->src_width = JZ4740_DMA_WIDTH_32BIT;
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dma_config->transfer_size = JZ4740_DMA_TRANSFER_SIZE_16BYTE;
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dma_config->request_type = JZ4740_DMA_TYPE_AIC_TRANSMIT;
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dma_config->flags = JZ4740_DMA_SRC_AUTOINC;
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dma_config->mode = JZ4740_DMA_MODE_SINGLE;
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i2s->pcm_config_playback.fifo_addr = i2s->phys_base + JZ_REG_AIC_FIFO;
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dma_data = &i2s->playback_dma_data;
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dma_data->maxburst = 16;
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dma_data->slave_id = JZ4740_DMA_TYPE_AIC_TRANSMIT;
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dma_data->addr = i2s->phys_base + JZ_REG_AIC_FIFO;
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/* Capture */
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dma_config = &i2s->pcm_config_capture.dma_config;
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dma_config->dst_width = JZ4740_DMA_WIDTH_32BIT;
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dma_config->transfer_size = JZ4740_DMA_TRANSFER_SIZE_16BYTE;
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dma_config->request_type = JZ4740_DMA_TYPE_AIC_RECEIVE;
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dma_config->flags = JZ4740_DMA_DST_AUTOINC;
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dma_config->mode = JZ4740_DMA_MODE_SINGLE;
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i2s->pcm_config_capture.fifo_addr = i2s->phys_base + JZ_REG_AIC_FIFO;
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dma_data = &i2s->capture_dma_data;
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dma_data->maxburst = 16;
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dma_data->slave_id = JZ4740_DMA_TYPE_AIC_RECEIVE;
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dma_data->addr = i2s->phys_base + JZ_REG_AIC_FIFO;
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}
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static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai)
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@ -371,6 +354,8 @@ static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai)
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clk_prepare_enable(i2s->clk_aic);
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jz4740_i2c_init_pcm_config(i2s);
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snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data,
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&i2s->capture_dma_data);
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conf = (7 << JZ_AIC_CONF_FIFO_RX_THRESHOLD_OFFSET) |
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(8 << JZ_AIC_CONF_FIFO_TX_THRESHOLD_OFFSET) |
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@ -456,8 +441,13 @@ static int jz4740_i2s_dev_probe(struct platform_device *pdev)
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platform_set_drvdata(pdev, i2s);
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return devm_snd_soc_register_component(&pdev->dev,
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ret = devm_snd_soc_register_component(&pdev->dev,
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&jz4740_i2s_component, &jz4740_i2s_dai, 1);
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if (ret)
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return ret;
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return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL,
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SND_DMAENGINE_PCM_FLAG_COMPAT);
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}
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static struct platform_driver jz4740_i2s_driver = {
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@ -1,358 +0,0 @@
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/*
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* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
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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 of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.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 <linux/dma-mapping.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 <asm/mach-jz4740/dma.h>
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#include "jz4740-pcm.h"
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struct jz4740_runtime_data {
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unsigned long dma_period;
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dma_addr_t dma_start;
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dma_addr_t dma_pos;
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dma_addr_t dma_end;
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struct jz4740_dma_chan *dma;
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dma_addr_t fifo_addr;
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};
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/* identify hardware playback capabilities */
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static const struct snd_pcm_hardware jz4740_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_BLOCK_TRANSFER,
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
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.rates = SNDRV_PCM_RATE_8000_48000,
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.channels_min = 1,
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.channels_max = 2,
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.period_bytes_min = 16,
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.period_bytes_max = 2 * PAGE_SIZE,
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.periods_min = 2,
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.periods_max = 128,
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.buffer_bytes_max = 128 * 2 * PAGE_SIZE,
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.fifo_size = 32,
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};
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static void jz4740_pcm_start_transfer(struct jz4740_runtime_data *prtd,
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struct snd_pcm_substream *substream)
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{
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unsigned long count;
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if (prtd->dma_pos == prtd->dma_end)
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prtd->dma_pos = prtd->dma_start;
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if (prtd->dma_pos + prtd->dma_period > prtd->dma_end)
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count = prtd->dma_end - prtd->dma_pos;
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else
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count = prtd->dma_period;
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jz4740_dma_disable(prtd->dma);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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jz4740_dma_set_src_addr(prtd->dma, prtd->dma_pos);
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jz4740_dma_set_dst_addr(prtd->dma, prtd->fifo_addr);
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} else {
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jz4740_dma_set_src_addr(prtd->dma, prtd->fifo_addr);
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jz4740_dma_set_dst_addr(prtd->dma, prtd->dma_pos);
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}
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jz4740_dma_set_transfer_count(prtd->dma, count);
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prtd->dma_pos += count;
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jz4740_dma_enable(prtd->dma);
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}
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static void jz4740_pcm_dma_transfer_done(struct jz4740_dma_chan *dma, int err,
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void *dev_id)
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{
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struct snd_pcm_substream *substream = dev_id;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct jz4740_runtime_data *prtd = runtime->private_data;
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snd_pcm_period_elapsed(substream);
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jz4740_pcm_start_transfer(prtd, substream);
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}
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static int jz4740_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_pcm_runtime *runtime = substream->runtime;
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struct jz4740_runtime_data *prtd = runtime->private_data;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct jz4740_pcm_config *config;
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config = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
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if (!config)
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return 0;
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if (!prtd->dma) {
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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prtd->dma = jz4740_dma_request(substream, "PCM Capture");
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else
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prtd->dma = jz4740_dma_request(substream, "PCM Playback");
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}
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if (!prtd->dma)
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return -EBUSY;
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jz4740_dma_configure(prtd->dma, &config->dma_config);
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prtd->fifo_addr = config->fifo_addr;
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jz4740_dma_set_complete_cb(prtd->dma, jz4740_pcm_dma_transfer_done);
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snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
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runtime->dma_bytes = params_buffer_bytes(params);
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prtd->dma_period = params_period_bytes(params);
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prtd->dma_start = runtime->dma_addr;
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prtd->dma_pos = prtd->dma_start;
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prtd->dma_end = prtd->dma_start + runtime->dma_bytes;
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return 0;
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}
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static int jz4740_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct jz4740_runtime_data *prtd = substream->runtime->private_data;
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snd_pcm_set_runtime_buffer(substream, NULL);
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if (prtd->dma) {
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jz4740_dma_free(prtd->dma);
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prtd->dma = NULL;
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}
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return 0;
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}
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static int jz4740_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct jz4740_runtime_data *prtd = substream->runtime->private_data;
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if (!prtd->dma)
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return -EBUSY;
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prtd->dma_pos = prtd->dma_start;
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return 0;
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}
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static int jz4740_pcm_trigger(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 jz4740_runtime_data *prtd = runtime->private_data;
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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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jz4740_pcm_start_transfer(prtd, substream);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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jz4740_dma_disable(prtd->dma);
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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 snd_pcm_uframes_t jz4740_pcm_pointer(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 jz4740_runtime_data *prtd = runtime->private_data;
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unsigned long byte_offset;
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snd_pcm_uframes_t offset;
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struct jz4740_dma_chan *dma = prtd->dma;
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/* prtd->dma_pos points to the end of the current transfer. So by
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* subtracting prdt->dma_start we get the offset to the end of the
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* current period in bytes. By subtracting the residue of the transfer
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* we get the current offset in bytes. */
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byte_offset = prtd->dma_pos - prtd->dma_start;
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byte_offset -= jz4740_dma_get_residue(dma);
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offset = bytes_to_frames(runtime, byte_offset);
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if (offset >= runtime->buffer_size)
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offset = 0;
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return offset;
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}
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static int jz4740_pcm_open(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 jz4740_runtime_data *prtd;
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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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snd_soc_set_runtime_hwparams(substream, &jz4740_pcm_hardware);
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runtime->private_data = prtd;
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return 0;
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}
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static int jz4740_pcm_close(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 jz4740_runtime_data *prtd = runtime->private_data;
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kfree(prtd);
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return 0;
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}
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static int jz4740_pcm_mmap(struct snd_pcm_substream *substream,
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struct vm_area_struct *vma)
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{
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return remap_pfn_range(vma, vma->vm_start,
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substream->dma_buffer.addr >> PAGE_SHIFT,
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vma->vm_end - vma->vm_start, vma->vm_page_prot);
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}
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static struct snd_pcm_ops jz4740_pcm_ops = {
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.open = jz4740_pcm_open,
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.close = jz4740_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = jz4740_pcm_hw_params,
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.hw_free = jz4740_pcm_hw_free,
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.prepare = jz4740_pcm_prepare,
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.trigger = jz4740_pcm_trigger,
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.pointer = jz4740_pcm_pointer,
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.mmap = jz4740_pcm_mmap,
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};
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static int jz4740_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
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{
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struct snd_pcm_substream *substream = pcm->streams[stream].substream;
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struct snd_dma_buffer *buf = &substream->dma_buffer;
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size_t size = jz4740_pcm_hardware.buffer_bytes_max;
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buf->dev.type = SNDRV_DMA_TYPE_DEV;
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buf->dev.dev = pcm->card->dev;
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buf->private_data = NULL;
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buf->area = dma_alloc_noncoherent(pcm->card->dev, size,
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&buf->addr, GFP_KERNEL);
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if (!buf->area)
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return -ENOMEM;
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buf->bytes = size;
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return 0;
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}
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static void jz4740_pcm_free(struct snd_pcm *pcm)
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{
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struct snd_pcm_substream *substream;
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struct snd_dma_buffer *buf;
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int stream;
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for (stream = 0; stream < SNDRV_PCM_STREAM_LAST; ++stream) {
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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 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;
|
||||
|
||||
ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
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 int jz4740_pcm_probe(struct platform_device *pdev)
|
||||
{
|
||||
return snd_soc_register_platform(&pdev->dev, &jz4740_soc_platform);
|
||||
}
|
||||
|
||||
static int jz4740_pcm_remove(struct platform_device *pdev)
|
||||
{
|
||||
snd_soc_unregister_platform(&pdev->dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver jz4740_pcm_driver = {
|
||||
.probe = jz4740_pcm_probe,
|
||||
.remove = jz4740_pcm_remove,
|
||||
.driver = {
|
||||
.name = "jz4740-pcm-audio",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(jz4740_pcm_driver);
|
||||
|
||||
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
|
||||
MODULE_DESCRIPTION("Ingenic SoC JZ4740 PCM driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
@ -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
|
||||
@ -73,7 +73,7 @@ static struct snd_soc_dai_link qi_lb60_dai = {
|
||||
.name = "jz4740",
|
||||
.stream_name = "jz4740",
|
||||
.cpu_dai_name = "jz4740-i2s",
|
||||
.platform_name = "jz4740-pcm-audio",
|
||||
.platform_name = "jz4740-i2s",
|
||||
.codec_dai_name = "jz4740-hifi",
|
||||
.codec_name = "jz4740-codec",
|
||||
.init = qi_lb60_codec_init,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user