[ALSA] Davinci ASoC support
Add ASoC support for the TI Davinci SoC and the Davicni-EVM reference board. It includes: - ASoC Davinci DMA driver - ASoC Davinci I2S (Davinci McBSP module based) driver - ASoC Davinci-EVM reference board Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>hifive-unleashed-5.1
Vladimir Barinov
Takashi Iwai
parent
b40b04ad38
commit
310355c111
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@ -29,6 +29,7 @@ source "sound/soc/pxa/Kconfig"
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source "sound/soc/s3c24xx/Kconfig"
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source "sound/soc/sh/Kconfig"
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source "sound/soc/fsl/Kconfig"
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source "sound/soc/davinci/Kconfig"
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# Supported codecs
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source "sound/soc/codecs/Kconfig"
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@ -1,4 +1,4 @@
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snd-soc-core-objs := soc-core.o soc-dapm.o
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obj-$(CONFIG_SND_SOC) += snd-soc-core.o
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obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/ fsl/
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obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/ fsl/ davinci/
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@ -0,0 +1,19 @@
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config SND_DAVINCI_SOC
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tristate "SoC Audio for the TI DAVINCI chip"
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depends on ARCH_DAVINCI && SND_SOC
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help
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Say Y or M if you want to add support for codecs attached to
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the DAVINCI AC97 or I2S interface. You will also need
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to select the audio interfaces to support below.
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config SND_DAVINCI_SOC_I2S
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tristate
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config SND_DAVINCI_SOC_EVM
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tristate "SoC Audio support for DaVinci EVM"
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depends on SND_DAVINCI_SOC && MACH_DAVINCI_EVM
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select SND_DAVINCI_SOC_I2S
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select SND_SOC_TLV320AIC3X
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help
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Say Y if you want to add support for SoC audio on TI
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DaVinci EVM platform.
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@ -0,0 +1,11 @@
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# DAVINCI Platform Support
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snd-soc-davinci-objs := davinci-pcm.o
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snd-soc-davinci-i2s-objs := davinci-i2s.o
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obj-$(CONFIG_SND_DAVINCI_SOC) += snd-soc-davinci.o
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obj-$(CONFIG_SND_DAVINCI_SOC_I2S) += snd-soc-davinci-i2s.o
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# DAVINCI Machine Support
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snd-soc-evm-objs := davinci-evm.o
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obj-$(CONFIG_SND_DAVINCI_SOC_EVM) += snd-soc-evm.o
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@ -0,0 +1,208 @@
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/*
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* ASoC driver for TI DAVINCI EVM platform
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*
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* Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
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* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <asm/mach-types.h>
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#include <asm/dma.h>
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#include <asm/arch/hardware.h>
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#include "../codecs/tlv320aic3x.h"
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#include "davinci-pcm.h"
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#include "davinci-i2s.h"
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#define EVM_CODEC_CLOCK 22579200
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static int evm_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_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
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struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
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int ret = 0;
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/* set codec DAI configuration */
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ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_CBM_CFM);
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if (ret < 0)
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return ret;
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/* set cpu DAI configuration */
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ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
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SND_SOC_DAIFMT_IB_NF);
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if (ret < 0)
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return ret;
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/* set the codec system clock */
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ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, EVM_CODEC_CLOCK,
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SND_SOC_CLOCK_OUT);
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if (ret < 0)
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return ret;
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return 0;
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}
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static struct snd_soc_ops evm_ops = {
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.hw_params = evm_hw_params,
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};
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/* davinci-evm machine dapm widgets */
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static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_LINE("Line Out", NULL),
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SND_SOC_DAPM_MIC("Mic Jack", NULL),
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SND_SOC_DAPM_LINE("Line In", NULL),
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};
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/* davinci-evm machine audio_mapnections to the codec pins */
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static const char *audio_map[][3] = {
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/* Headphone connected to HPLOUT, HPROUT */
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{"Headphone Jack", NULL, "HPLOUT"},
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{"Headphone Jack", NULL, "HPROUT"},
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/* Line Out connected to LLOUT, RLOUT */
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{"Line Out", NULL, "LLOUT"},
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{"Line Out", NULL, "RLOUT"},
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/* Mic connected to (MIC3L | MIC3R) */
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{"MIC3L", NULL, "Mic Bias 2V"},
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{"MIC3R", NULL, "Mic Bias 2V"},
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{"Mic Bias 2V", NULL, "Mic Jack"},
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/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
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{"LINE1L", NULL, "Line In"},
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{"LINE2L", NULL, "Line In"},
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{"LINE1R", NULL, "Line In"},
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{"LINE2R", NULL, "Line In"},
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{NULL, NULL, NULL},
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};
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/* Logic for a aic3x as connected on a davinci-evm */
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static int evm_aic3x_init(struct snd_soc_codec *codec)
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{
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int i;
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/* Add davinci-evm specific widgets */
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for (i = 0; i < ARRAY_SIZE(aic3x_dapm_widgets); i++)
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snd_soc_dapm_new_control(codec, &aic3x_dapm_widgets[i]);
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/* Set up davinci-evm specific audio path audio_map */
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for (i = 0; audio_map[i][0] != NULL; i++)
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snd_soc_dapm_connect_input(codec, audio_map[i][0],
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audio_map[i][1], audio_map[i][2]);
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/* not connected */
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snd_soc_dapm_set_endpoint(codec, "MONO_LOUT", 0);
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snd_soc_dapm_set_endpoint(codec, "HPLCOM", 0);
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snd_soc_dapm_set_endpoint(codec, "HPRCOM", 0);
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/* always connected */
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snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 1);
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snd_soc_dapm_set_endpoint(codec, "Line Out", 1);
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snd_soc_dapm_set_endpoint(codec, "Mic Jack", 1);
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snd_soc_dapm_set_endpoint(codec, "Line In", 1);
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snd_soc_dapm_sync_endpoints(codec);
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return 0;
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}
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/* davinci-evm digital audio interface glue - connects codec <--> CPU */
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static struct snd_soc_dai_link evm_dai = {
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.name = "TLV320AIC3X",
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.stream_name = "AIC3X",
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.cpu_dai = &davinci_i2s_dai,
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.codec_dai = &aic3x_dai,
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.init = evm_aic3x_init,
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.ops = &evm_ops,
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};
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/* davinci-evm audio machine driver */
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static struct snd_soc_machine snd_soc_machine_evm = {
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.name = "DaVinci EVM",
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.dai_link = &evm_dai,
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.num_links = 1,
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};
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/* evm audio private data */
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static struct aic3x_setup_data evm_aic3x_setup = {
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.i2c_address = 0x1b,
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};
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/* evm audio subsystem */
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static struct snd_soc_device evm_snd_devdata = {
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.machine = &snd_soc_machine_evm,
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.platform = &davinci_soc_platform,
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.codec_dev = &soc_codec_dev_aic3x,
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.codec_data = &evm_aic3x_setup,
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};
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static struct resource evm_snd_resources[] = {
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{
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.start = DAVINCI_MCBSP_BASE,
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.end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct evm_snd_platform_data evm_snd_data = {
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.tx_dma_ch = DM644X_DMACH_MCBSP_TX,
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.rx_dma_ch = DM644X_DMACH_MCBSP_RX,
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};
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static struct platform_device *evm_snd_device;
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static int __init evm_init(void)
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{
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int ret;
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evm_snd_device = platform_device_alloc("soc-audio", 0);
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if (!evm_snd_device)
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return -ENOMEM;
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platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
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evm_snd_devdata.dev = &evm_snd_device->dev;
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evm_snd_device->dev.platform_data = &evm_snd_data;
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ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
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ARRAY_SIZE(evm_snd_resources));
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if (ret) {
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platform_device_put(evm_snd_device);
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return ret;
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}
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ret = platform_device_add(evm_snd_device);
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if (ret)
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platform_device_put(evm_snd_device);
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return ret;
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}
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static void __exit evm_exit(void)
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{
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platform_device_unregister(evm_snd_device);
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}
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module_init(evm_init);
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module_exit(evm_exit);
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MODULE_AUTHOR("Vladimir Barinov");
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MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
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MODULE_LICENSE("GPL");
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@ -0,0 +1,407 @@
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/*
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* ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
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*
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* Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
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* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/clk.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/initval.h>
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#include <sound/soc.h>
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#include "davinci-pcm.h"
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#define DAVINCI_MCBSP_DRR_REG 0x00
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#define DAVINCI_MCBSP_DXR_REG 0x04
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#define DAVINCI_MCBSP_SPCR_REG 0x08
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#define DAVINCI_MCBSP_RCR_REG 0x0c
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#define DAVINCI_MCBSP_XCR_REG 0x10
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#define DAVINCI_MCBSP_SRGR_REG 0x14
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#define DAVINCI_MCBSP_PCR_REG 0x24
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#define DAVINCI_MCBSP_SPCR_RRST (1 << 0)
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#define DAVINCI_MCBSP_SPCR_RINTM(v) ((v) << 4)
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#define DAVINCI_MCBSP_SPCR_XRST (1 << 16)
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#define DAVINCI_MCBSP_SPCR_XINTM(v) ((v) << 20)
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#define DAVINCI_MCBSP_SPCR_GRST (1 << 22)
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#define DAVINCI_MCBSP_SPCR_FRST (1 << 23)
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#define DAVINCI_MCBSP_SPCR_FREE (1 << 25)
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#define DAVINCI_MCBSP_RCR_RWDLEN1(v) ((v) << 5)
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#define DAVINCI_MCBSP_RCR_RFRLEN1(v) ((v) << 8)
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#define DAVINCI_MCBSP_RCR_RDATDLY(v) ((v) << 16)
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#define DAVINCI_MCBSP_RCR_RWDLEN2(v) ((v) << 21)
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#define DAVINCI_MCBSP_XCR_XWDLEN1(v) ((v) << 5)
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#define DAVINCI_MCBSP_XCR_XFRLEN1(v) ((v) << 8)
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#define DAVINCI_MCBSP_XCR_XDATDLY(v) ((v) << 16)
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#define DAVINCI_MCBSP_XCR_XFIG (1 << 18)
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#define DAVINCI_MCBSP_XCR_XWDLEN2(v) ((v) << 21)
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#define DAVINCI_MCBSP_SRGR_FWID(v) ((v) << 8)
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#define DAVINCI_MCBSP_SRGR_FPER(v) ((v) << 16)
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#define DAVINCI_MCBSP_SRGR_FSGM (1 << 28)
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#define DAVINCI_MCBSP_PCR_CLKRP (1 << 0)
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#define DAVINCI_MCBSP_PCR_CLKXP (1 << 1)
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#define DAVINCI_MCBSP_PCR_FSRP (1 << 2)
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#define DAVINCI_MCBSP_PCR_FSXP (1 << 3)
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#define DAVINCI_MCBSP_PCR_CLKRM (1 << 8)
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#define DAVINCI_MCBSP_PCR_CLKXM (1 << 9)
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#define DAVINCI_MCBSP_PCR_FSRM (1 << 10)
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#define DAVINCI_MCBSP_PCR_FSXM (1 << 11)
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#define MOD_REG_BIT(val, mask, set) do { \
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if (set) { \
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val |= mask; \
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} else { \
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val &= ~mask; \
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} \
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} while (0)
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enum {
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DAVINCI_MCBSP_WORD_8 = 0,
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DAVINCI_MCBSP_WORD_12,
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DAVINCI_MCBSP_WORD_16,
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DAVINCI_MCBSP_WORD_20,
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DAVINCI_MCBSP_WORD_24,
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DAVINCI_MCBSP_WORD_32,
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};
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static struct davinci_pcm_dma_params davinci_i2s_pcm_out = {
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.name = "I2S PCM Stereo out",
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};
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static struct davinci_pcm_dma_params davinci_i2s_pcm_in = {
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.name = "I2S PCM Stereo in",
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};
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struct davinci_mcbsp_dev {
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void __iomem *base;
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struct clk *clk;
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struct davinci_pcm_dma_params *dma_params[2];
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};
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static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev,
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int reg, u32 val)
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{
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__raw_writel(val, dev->base + reg);
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}
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static inline u32 davinci_mcbsp_read_reg(struct davinci_mcbsp_dev *dev, int reg)
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{
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return __raw_readl(dev->base + reg);
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}
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static void davinci_mcbsp_start(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
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u32 w;
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/* Start the sample generator and enable transmitter/receiver */
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w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
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MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST, 1);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 1);
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else
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MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 1);
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davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
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/* Start frame sync */
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w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
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MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_FRST, 1);
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davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
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}
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static void davinci_mcbsp_stop(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
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u32 w;
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/* Reset transmitter/receiver and sample rate/frame sync generators */
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w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
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MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST |
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DAVINCI_MCBSP_SPCR_FRST, 0);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 0);
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else
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MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 0);
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davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
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}
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|
||||
static int davinci_i2s_startup(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
|
||||
struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
|
||||
|
||||
cpu_dai->dma_data = dev->dma_params[substream->stream];
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int davinci_i2s_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
|
||||
unsigned int fmt)
|
||||
{
|
||||
struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
|
||||
u32 w;
|
||||
|
||||
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
|
||||
case SND_SOC_DAIFMT_CBS_CFS:
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG,
|
||||
DAVINCI_MCBSP_PCR_FSXM |
|
||||
DAVINCI_MCBSP_PCR_FSRM |
|
||||
DAVINCI_MCBSP_PCR_CLKXM |
|
||||
DAVINCI_MCBSP_PCR_CLKRM);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG,
|
||||
DAVINCI_MCBSP_SRGR_FSGM);
|
||||
break;
|
||||
case SND_SOC_DAIFMT_CBM_CFM:
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, 0);
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
|
||||
case SND_SOC_DAIFMT_IB_NF:
|
||||
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
|
||||
MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_CLKXP |
|
||||
DAVINCI_MCBSP_PCR_CLKRP, 1);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
|
||||
break;
|
||||
case SND_SOC_DAIFMT_NB_IF:
|
||||
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
|
||||
MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_FSXP |
|
||||
DAVINCI_MCBSP_PCR_FSRP, 1);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
|
||||
break;
|
||||
case SND_SOC_DAIFMT_IB_IF:
|
||||
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_PCR_REG);
|
||||
MOD_REG_BIT(w, DAVINCI_MCBSP_PCR_CLKXP |
|
||||
DAVINCI_MCBSP_PCR_CLKRP |
|
||||
DAVINCI_MCBSP_PCR_FSXP |
|
||||
DAVINCI_MCBSP_PCR_FSRP, 1);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, w);
|
||||
break;
|
||||
case SND_SOC_DAIFMT_NB_NF:
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int davinci_i2s_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params)
|
||||
{
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
struct davinci_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data;
|
||||
struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
|
||||
struct snd_interval *i = NULL;
|
||||
int mcbsp_word_length;
|
||||
u32 w;
|
||||
|
||||
/* general line settings */
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG,
|
||||
DAVINCI_MCBSP_SPCR_RINTM(3) |
|
||||
DAVINCI_MCBSP_SPCR_XINTM(3) |
|
||||
DAVINCI_MCBSP_SPCR_FREE);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG,
|
||||
DAVINCI_MCBSP_RCR_RFRLEN1(1) |
|
||||
DAVINCI_MCBSP_RCR_RDATDLY(1));
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG,
|
||||
DAVINCI_MCBSP_XCR_XFRLEN1(1) |
|
||||
DAVINCI_MCBSP_XCR_XDATDLY(1) |
|
||||
DAVINCI_MCBSP_XCR_XFIG);
|
||||
|
||||
i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
|
||||
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SRGR_REG);
|
||||
MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FWID(snd_interval_value(i) - 1), 1);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, w);
|
||||
|
||||
i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_FRAME_BITS);
|
||||
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SRGR_REG);
|
||||
MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1), 1);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, w);
|
||||
|
||||
/* Determine xfer data type */
|
||||
switch (params_format(params)) {
|
||||
case SNDRV_PCM_FORMAT_S8:
|
||||
dma_params->data_type = 1;
|
||||
mcbsp_word_length = DAVINCI_MCBSP_WORD_8;
|
||||
break;
|
||||
case SNDRV_PCM_FORMAT_S16_LE:
|
||||
dma_params->data_type = 2;
|
||||
mcbsp_word_length = DAVINCI_MCBSP_WORD_16;
|
||||
break;
|
||||
case SNDRV_PCM_FORMAT_S32_LE:
|
||||
dma_params->data_type = 4;
|
||||
mcbsp_word_length = DAVINCI_MCBSP_WORD_32;
|
||||
break;
|
||||
default:
|
||||
printk(KERN_WARNING "davinci-i2s: unsupported PCM format");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_RCR_REG);
|
||||
MOD_REG_BIT(w, DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) |
|
||||
DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length), 1);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, w);
|
||||
|
||||
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_XCR_REG);
|
||||
MOD_REG_BIT(w, DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) |
|
||||
DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length), 1);
|
||||
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, w);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int davinci_i2s_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
||||
davinci_mcbsp_start(substream);
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
davinci_mcbsp_stop(substream);
|
||||
break;
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_i2s_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
||||
struct snd_soc_machine *machine = socdev->machine;
|
||||
struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[pdev->id].cpu_dai;
|
||||
struct davinci_mcbsp_dev *dev;
|
||||
struct resource *mem, *ioarea;
|
||||
struct evm_snd_platform_data *pdata;
|
||||
int ret;
|
||||
|
||||
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!mem) {
|
||||
dev_err(&pdev->dev, "no mem resource?\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
ioarea = request_mem_region(mem->start, (mem->end - mem->start) + 1,
|
||||
pdev->name);
|
||||
if (!ioarea) {
|
||||
dev_err(&pdev->dev, "McBSP region already claimed\n");
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
dev = kzalloc(sizeof(struct davinci_mcbsp_dev), GFP_KERNEL);
|
||||
if (!dev) {
|
||||
ret = -ENOMEM;
|
||||
goto err_release_region;
|
||||
}
|
||||
|
||||
cpu_dai->private_data = dev;
|
||||
|
||||
dev->clk = clk_get(&pdev->dev, "McBSPCLK");
|
||||
if (IS_ERR(dev->clk)) {
|
||||
ret = -ENODEV;
|
||||
goto err_free_mem;
|
||||
}
|
||||
clk_enable(dev->clk);
|
||||
|
||||
dev->base = (void __iomem *)IO_ADDRESS(mem->start);
|
||||
pdata = pdev->dev.platform_data;
|
||||
|
||||
dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK] = &davinci_i2s_pcm_out;
|
||||
dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->channel = pdata->tx_dma_ch;
|
||||
dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->dma_addr =
|
||||
(dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DXR_REG);
|
||||
|
||||
dev->dma_params[SNDRV_PCM_STREAM_CAPTURE] = &davinci_i2s_pcm_in;
|
||||
dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->channel = pdata->rx_dma_ch;
|
||||
dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->dma_addr =
|
||||
(dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DRR_REG);
|
||||
|
||||
return 0;
|
||||
|
||||
err_free_mem:
|
||||
kfree(dev);
|
||||
err_release_region:
|
||||
release_mem_region(mem->start, (mem->end - mem->start) + 1);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void davinci_i2s_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
||||
struct snd_soc_machine *machine = socdev->machine;
|
||||
struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[pdev->id].cpu_dai;
|
||||
struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
|
||||
struct resource *mem;
|
||||
|
||||
clk_disable(dev->clk);
|
||||
clk_put(dev->clk);
|
||||
dev->clk = NULL;
|
||||
|
||||
kfree(dev);
|
||||
|
||||
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
release_mem_region(mem->start, (mem->end - mem->start) + 1);
|
||||
}
|
||||
|
||||
#define DAVINCI_I2S_RATES SNDRV_PCM_RATE_8000_96000
|
||||
|
||||
struct snd_soc_cpu_dai davinci_i2s_dai = {
|
||||
.name = "davinci-i2s",
|
||||
.id = 0,
|
||||
.type = SND_SOC_DAI_I2S,
|
||||
.probe = davinci_i2s_probe,
|
||||
.remove = davinci_i2s_remove,
|
||||
.playback = {
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
.rates = DAVINCI_I2S_RATES,
|
||||
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
|
||||
.capture = {
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
.rates = DAVINCI_I2S_RATES,
|
||||
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
|
||||
.ops = {
|
||||
.startup = davinci_i2s_startup,
|
||||
.trigger = davinci_i2s_trigger,
|
||||
.hw_params = davinci_i2s_hw_params,},
|
||||
.dai_ops = {
|
||||
.set_fmt = davinci_i2s_set_dai_fmt,
|
||||
},
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(davinci_i2s_dai);
|
||||
|
||||
MODULE_AUTHOR("Vladimir Barinov");
|
||||
MODULE_DESCRIPTION("TI DAVINCI I2S (McBSP) SoC Interface");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -0,0 +1,17 @@
|
|||
/*
|
||||
* ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
|
||||
*
|
||||
* Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
|
||||
* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
|
||||
*
|
||||
* 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 _DAVINCI_I2S_H
|
||||
#define _DAVINCI_I2S_H
|
||||
|
||||
extern struct snd_soc_cpu_dai davinci_i2s_dai;
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,389 @@
|
|||
/*
|
||||
* ALSA PCM interface for the TI DAVINCI processor
|
||||
*
|
||||
* Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
|
||||
* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
|
||||
#include <sound/core.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/pcm_params.h>
|
||||
#include <sound/soc.h>
|
||||
|
||||
#include <asm/dma.h>
|
||||
|
||||
#include "davinci-pcm.h"
|
||||
|
||||
#define DAVINCI_PCM_DEBUG 0
|
||||
#if DAVINCI_PCM_DEBUG
|
||||
#define DPRINTK(x...) printk(KERN_DEBUG x)
|
||||
#else
|
||||
#define DPRINTK(x...)
|
||||
#endif
|
||||
|
||||
static struct snd_pcm_hardware davinci_pcm_hardware = {
|
||||
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
|
||||
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
|
||||
SNDRV_PCM_INFO_PAUSE),
|
||||
.formats = (SNDRV_PCM_FMTBIT_S16_LE),
|
||||
.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
|
||||
SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
|
||||
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
|
||||
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
|
||||
SNDRV_PCM_RATE_KNOT),
|
||||
.rate_min = 8000,
|
||||
.rate_max = 96000,
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
.buffer_bytes_max = 128 * 1024,
|
||||
.period_bytes_min = 32,
|
||||
.period_bytes_max = 8 * 1024,
|
||||
.periods_min = 16,
|
||||
.periods_max = 255,
|
||||
.fifo_size = 0,
|
||||
};
|
||||
|
||||
struct davinci_runtime_data {
|
||||
spinlock_t lock;
|
||||
int period; /* current DMA period */
|
||||
int master_lch; /* Master DMA channel */
|
||||
int slave_lch; /* Slave DMA channel */
|
||||
struct davinci_pcm_dma_params *params; /* DMA params */
|
||||
};
|
||||
|
||||
static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
int lch = prtd->slave_lch;
|
||||
unsigned int period_size;
|
||||
unsigned int dma_offset;
|
||||
dma_addr_t dma_pos;
|
||||
dma_addr_t src, dst;
|
||||
unsigned short src_bidx, dst_bidx;
|
||||
unsigned int data_type;
|
||||
unsigned int count;
|
||||
|
||||
period_size = snd_pcm_lib_period_bytes(substream);
|
||||
dma_offset = prtd->period * period_size;
|
||||
dma_pos = runtime->dma_addr + dma_offset;
|
||||
|
||||
DPRINTK("audio_set_dma_params_play channel = %d dma_ptr = %x "
|
||||
"period_size=%x\n", lch, dma_pos, period_size);
|
||||
|
||||
data_type = prtd->params->data_type;
|
||||
count = period_size / data_type;
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||||
src = dma_pos;
|
||||
dst = prtd->params->dma_addr;
|
||||
src_bidx = data_type;
|
||||
dst_bidx = 0;
|
||||
} else {
|
||||
src = prtd->params->dma_addr;
|
||||
dst = dma_pos;
|
||||
src_bidx = 0;
|
||||
dst_bidx = data_type;
|
||||
}
|
||||
|
||||
davinci_set_dma_src_params(lch, src, INCR, W8BIT);
|
||||
davinci_set_dma_dest_params(lch, dst, INCR, W8BIT);
|
||||
davinci_set_dma_src_index(lch, src_bidx, 0);
|
||||
davinci_set_dma_dest_index(lch, dst_bidx, 0);
|
||||
davinci_set_dma_transfer_params(lch, data_type, count, 1, 0, ASYNC);
|
||||
|
||||
prtd->period++;
|
||||
if (unlikely(prtd->period >= runtime->periods))
|
||||
prtd->period = 0;
|
||||
}
|
||||
|
||||
static void davinci_pcm_dma_irq(int lch, u16 ch_status, void *data)
|
||||
{
|
||||
struct snd_pcm_substream *substream = data;
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
|
||||
DPRINTK("lch=%d, status=0x%x\n", lch, ch_status);
|
||||
|
||||
if (unlikely(ch_status != DMA_COMPLETE))
|
||||
return;
|
||||
|
||||
if (snd_pcm_running(substream)) {
|
||||
snd_pcm_period_elapsed(substream);
|
||||
|
||||
spin_lock(&prtd->lock);
|
||||
davinci_pcm_enqueue_dma(substream);
|
||||
spin_unlock(&prtd->lock);
|
||||
}
|
||||
}
|
||||
|
||||
static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
struct davinci_pcm_dma_params *dma_data = rtd->dai->cpu_dai->dma_data;
|
||||
int tcc = TCC_ANY;
|
||||
int ret;
|
||||
|
||||
if (!dma_data)
|
||||
return -ENODEV;
|
||||
|
||||
prtd->params = dma_data;
|
||||
|
||||
/* Request master DMA channel */
|
||||
ret = davinci_request_dma(prtd->params->channel, prtd->params->name,
|
||||
davinci_pcm_dma_irq, substream,
|
||||
&prtd->master_lch, &tcc, EVENTQ_0);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* Request slave DMA channel */
|
||||
ret = davinci_request_dma(PARAM_ANY, "Link",
|
||||
NULL, NULL, &prtd->slave_lch, &tcc, EVENTQ_0);
|
||||
if (ret) {
|
||||
davinci_free_dma(prtd->master_lch);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Link slave DMA channel in loopback */
|
||||
davinci_dma_link_lch(prtd->slave_lch, prtd->slave_lch);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
int ret = 0;
|
||||
|
||||
spin_lock(&prtd->lock);
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
||||
davinci_start_dma(prtd->master_lch);
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
davinci_stop_dma(prtd->master_lch);
|
||||
break;
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
spin_unlock(&prtd->lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_pcm_prepare(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct davinci_runtime_data *prtd = substream->runtime->private_data;
|
||||
struct paramentry_descriptor temp;
|
||||
|
||||
prtd->period = 0;
|
||||
davinci_pcm_enqueue_dma(substream);
|
||||
|
||||
/* Get slave channel dma params for master channel startup */
|
||||
davinci_get_dma_params(prtd->slave_lch, &temp);
|
||||
davinci_set_dma_params(prtd->master_lch, &temp);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t
|
||||
davinci_pcm_pointer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct davinci_runtime_data *prtd = runtime->private_data;
|
||||
unsigned int offset;
|
||||
dma_addr_t count;
|
||||
dma_addr_t src, dst;
|
||||
|
||||
spin_lock(&prtd->lock);
|
||||
|
||||
davinci_dma_getposition(prtd->master_lch, &src, &dst);
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
||||
count = src - runtime->dma_addr;
|
||||
else
|
||||
count = dst - runtime->dma_addr;;
|
||||
|
||||
spin_unlock(&prtd->lock);
|
||||
|
||||
offset = bytes_to_frames(runtime, count);
|
||||
if (offset >= runtime->buffer_size)
|
||||
offset = 0;
|
||||
|
||||
return offset;
|
||||
}
|
||||
|
||||
static int davinci_pcm_open(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct davinci_runtime_data *prtd;
|
||||
int ret = 0;
|
||||
|
||||
snd_soc_set_runtime_hwparams(substream, &davinci_pcm_hardware);
|
||||
|
||||
prtd = kzalloc(sizeof(struct davinci_runtime_data), GFP_KERNEL);
|
||||
if (prtd == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
spin_lock_init(&prtd->lock);
|
||||
|
||||
runtime->private_data = prtd;
|
||||
|
||||
ret = davinci_pcm_dma_request(substream);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "davinci_pcm: Failed to get dma channels\n");
|
||||
kfree(prtd);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int davinci_pcm_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct davinci_runtime_data *prtd = runtime->private_data;
|
||||
|
||||
davinci_dma_unlink_lch(prtd->slave_lch, prtd->slave_lch);
|
||||
|
||||
davinci_free_dma(prtd->slave_lch);
|
||||
davinci_free_dma(prtd->master_lch);
|
||||
|
||||
kfree(prtd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int davinci_pcm_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *hw_params)
|
||||
{
|
||||
return snd_pcm_lib_malloc_pages(substream,
|
||||
params_buffer_bytes(hw_params));
|
||||
}
|
||||
|
||||
static int davinci_pcm_hw_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
return snd_pcm_lib_free_pages(substream);
|
||||
}
|
||||
|
||||
static int davinci_pcm_mmap(struct snd_pcm_substream *substream,
|
||||
struct vm_area_struct *vma)
|
||||
{
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
|
||||
return dma_mmap_writecombine(substream->pcm->card->dev, vma,
|
||||
runtime->dma_area,
|
||||
runtime->dma_addr,
|
||||
runtime->dma_bytes);
|
||||
}
|
||||
|
||||
struct snd_pcm_ops davinci_pcm_ops = {
|
||||
.open = davinci_pcm_open,
|
||||
.close = davinci_pcm_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = davinci_pcm_hw_params,
|
||||
.hw_free = davinci_pcm_hw_free,
|
||||
.prepare = davinci_pcm_prepare,
|
||||
.trigger = davinci_pcm_trigger,
|
||||
.pointer = davinci_pcm_pointer,
|
||||
.mmap = davinci_pcm_mmap,
|
||||
};
|
||||
|
||||
static int davinci_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 = davinci_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_writecombine(pcm->card->dev, size,
|
||||
&buf->addr, GFP_KERNEL);
|
||||
|
||||
DPRINTK("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
|
||||
(void *) buf->area, (void *) buf->addr, size);
|
||||
|
||||
if (!buf->area)
|
||||
return -ENOMEM;
|
||||
|
||||
buf->bytes = size;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void davinci_pcm_free(struct snd_pcm *pcm)
|
||||
{
|
||||
struct snd_pcm_substream *substream;
|
||||
struct snd_dma_buffer *buf;
|
||||
int stream;
|
||||
|
||||
for (stream = 0; stream < 2; stream++) {
|
||||
substream = pcm->streams[stream].substream;
|
||||
if (!substream)
|
||||
continue;
|
||||
|
||||
buf = &substream->dma_buffer;
|
||||
if (!buf->area)
|
||||
continue;
|
||||
|
||||
dma_free_writecombine(pcm->card->dev, buf->bytes,
|
||||
buf->area, buf->addr);
|
||||
buf->area = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static u64 davinci_pcm_dmamask = 0xffffffff;
|
||||
|
||||
static int davinci_pcm_new(struct snd_card *card,
|
||||
struct snd_soc_codec_dai *dai, struct snd_pcm *pcm)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (!card->dev->dma_mask)
|
||||
card->dev->dma_mask = &davinci_pcm_dmamask;
|
||||
if (!card->dev->coherent_dma_mask)
|
||||
card->dev->coherent_dma_mask = 0xffffffff;
|
||||
|
||||
if (dai->playback.channels_min) {
|
||||
ret = davinci_pcm_preallocate_dma_buffer(pcm,
|
||||
SNDRV_PCM_STREAM_PLAYBACK);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (dai->capture.channels_min) {
|
||||
ret = davinci_pcm_preallocate_dma_buffer(pcm,
|
||||
SNDRV_PCM_STREAM_CAPTURE);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct snd_soc_platform davinci_soc_platform = {
|
||||
.name = "davinci-audio",
|
||||
.pcm_ops = &davinci_pcm_ops,
|
||||
.pcm_new = davinci_pcm_new,
|
||||
.pcm_free = davinci_pcm_free,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(davinci_soc_platform);
|
||||
|
||||
MODULE_AUTHOR("Vladimir Barinov");
|
||||
MODULE_DESCRIPTION("TI DAVINCI PCM DMA module");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -0,0 +1,29 @@
|
|||
/*
|
||||
* ALSA PCM interface for the TI DAVINCI processor
|
||||
*
|
||||
* Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
|
||||
* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
|
||||
*
|
||||
* 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 _DAVINCI_PCM_H
|
||||
#define _DAVINCI_PCM_H
|
||||
|
||||
struct davinci_pcm_dma_params {
|
||||
char *name; /* stream identifier */
|
||||
int channel; /* sync dma channel ID */
|
||||
dma_addr_t dma_addr; /* device physical address for DMA */
|
||||
unsigned int data_type; /* xfer data type */
|
||||
};
|
||||
|
||||
struct evm_snd_platform_data {
|
||||
int tx_dma_ch;
|
||||
int rx_dma_ch;
|
||||
};
|
||||
|
||||
extern struct snd_soc_platform davinci_soc_platform;
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue