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[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>
This commit is contained in:
Vladimir Barinov 2008-02-18 11:40:22 +01:00 committed by Takashi Iwai
parent b40b04ad38
commit 310355c111
9 changed files with 1082 additions and 1 deletions
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1
sound/soc/Kconfig
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@ -29,6 +29,7 @@ source "sound/soc/pxa/Kconfig"
source "sound/soc/s3c24xx/Kconfig"
source "sound/soc/sh/Kconfig"
source "sound/soc/fsl/Kconfig"
source "sound/soc/davinci/Kconfig"
# Supported codecs
source "sound/soc/codecs/Kconfig"

2
sound/soc/Makefile
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@ -1,4 +1,4 @@
snd-soc-core-objs := soc-core.o soc-dapm.o
obj-$(CONFIG_SND_SOC) += snd-soc-core.o
obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/ fsl/
obj-$(CONFIG_SND_SOC) += codecs/ at91/ pxa/ s3c24xx/ sh/ fsl/ davinci/

19
sound/soc/davinci/Kconfig Normal file
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@ -0,0 +1,19 @@
config SND_DAVINCI_SOC
tristate "SoC Audio for the TI DAVINCI chip"
depends on ARCH_DAVINCI && SND_SOC
help
Say Y or M if you want to add support for codecs attached to
the DAVINCI AC97 or I2S interface. You will also need
to select the audio interfaces to support below.
config SND_DAVINCI_SOC_I2S
tristate
config SND_DAVINCI_SOC_EVM
tristate "SoC Audio support for DaVinci EVM"
depends on SND_DAVINCI_SOC && MACH_DAVINCI_EVM
select SND_DAVINCI_SOC_I2S
select SND_SOC_TLV320AIC3X
help
Say Y if you want to add support for SoC audio on TI
DaVinci EVM platform.

11
sound/soc/davinci/Makefile Normal file
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@ -0,0 +1,11 @@
# DAVINCI Platform Support
snd-soc-davinci-objs := davinci-pcm.o
snd-soc-davinci-i2s-objs := davinci-i2s.o
obj-$(CONFIG_SND_DAVINCI_SOC) += snd-soc-davinci.o
obj-$(CONFIG_SND_DAVINCI_SOC_I2S) += snd-soc-davinci-i2s.o
# DAVINCI Machine Support
snd-soc-evm-objs := davinci-evm.o
obj-$(CONFIG_SND_DAVINCI_SOC_EVM) += snd-soc-evm.o

208
sound/soc/davinci/davinci-evm.c Normal file
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@ -0,0 +1,208 @@
/*
* ASoC driver for TI DAVINCI EVM platform
*
* 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/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <asm/mach-types.h>
#include <asm/dma.h>
#include <asm/arch/hardware.h>
#include "../codecs/tlv320aic3x.h"
#include "davinci-pcm.h"
#include "davinci-i2s.h"
#define EVM_CODEC_CLOCK 22579200
static int evm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
int ret = 0;
/* set codec DAI configuration */
ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
/* set cpu DAI configuration */
ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
SND_SOC_DAIFMT_IB_NF);
if (ret < 0)
return ret;
/* set the codec system clock */
ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, EVM_CODEC_CLOCK,
SND_SOC_CLOCK_OUT);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops evm_ops = {
.hw_params = evm_hw_params,
};
/* davinci-evm machine dapm widgets */
static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_LINE("Line Out", NULL),
SND_SOC_DAPM_MIC("Mic Jack", NULL),
SND_SOC_DAPM_LINE("Line In", NULL),
};
/* davinci-evm machine audio_mapnections to the codec pins */
static const char *audio_map[][3] = {
/* Headphone connected to HPLOUT, HPROUT */
{"Headphone Jack", NULL, "HPLOUT"},
{"Headphone Jack", NULL, "HPROUT"},
/* Line Out connected to LLOUT, RLOUT */
{"Line Out", NULL, "LLOUT"},
{"Line Out", NULL, "RLOUT"},
/* Mic connected to (MIC3L | MIC3R) */
{"MIC3L", NULL, "Mic Bias 2V"},
{"MIC3R", NULL, "Mic Bias 2V"},
{"Mic Bias 2V", NULL, "Mic Jack"},
/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
{"LINE1L", NULL, "Line In"},
{"LINE2L", NULL, "Line In"},
{"LINE1R", NULL, "Line In"},
{"LINE2R", NULL, "Line In"},
{NULL, NULL, NULL},
};
/* Logic for a aic3x as connected on a davinci-evm */
static int evm_aic3x_init(struct snd_soc_codec *codec)
{
int i;
/* Add davinci-evm specific widgets */
for (i = 0; i < ARRAY_SIZE(aic3x_dapm_widgets); i++)
snd_soc_dapm_new_control(codec, &aic3x_dapm_widgets[i]);
/* Set up davinci-evm specific audio path audio_map */
for (i = 0; audio_map[i][0] != NULL; i++)
snd_soc_dapm_connect_input(codec, audio_map[i][0],
audio_map[i][1], audio_map[i][2]);
/* not connected */
snd_soc_dapm_set_endpoint(codec, "MONO_LOUT", 0);
snd_soc_dapm_set_endpoint(codec, "HPLCOM", 0);
snd_soc_dapm_set_endpoint(codec, "HPRCOM", 0);
/* always connected */
snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 1);
snd_soc_dapm_set_endpoint(codec, "Line Out", 1);
snd_soc_dapm_set_endpoint(codec, "Mic Jack", 1);
snd_soc_dapm_set_endpoint(codec, "Line In", 1);
snd_soc_dapm_sync_endpoints(codec);
return 0;
}
/* davinci-evm digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link evm_dai = {
.name = "TLV320AIC3X",
.stream_name = "AIC3X",
.cpu_dai = &davinci_i2s_dai,
.codec_dai = &aic3x_dai,
.init = evm_aic3x_init,
.ops = &evm_ops,
};
/* davinci-evm audio machine driver */
static struct snd_soc_machine snd_soc_machine_evm = {
.name = "DaVinci EVM",
.dai_link = &evm_dai,
.num_links = 1,
};
/* evm audio private data */
static struct aic3x_setup_data evm_aic3x_setup = {
.i2c_address = 0x1b,
};
/* evm audio subsystem */
static struct snd_soc_device evm_snd_devdata = {
.machine = &snd_soc_machine_evm,
.platform = &davinci_soc_platform,
.codec_dev = &soc_codec_dev_aic3x,
.codec_data = &evm_aic3x_setup,
};
static struct resource evm_snd_resources[] = {
{
.start = DAVINCI_MCBSP_BASE,
.end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
.flags = IORESOURCE_MEM,
},
};
static struct evm_snd_platform_data evm_snd_data = {
.tx_dma_ch = DM644X_DMACH_MCBSP_TX,
.rx_dma_ch = DM644X_DMACH_MCBSP_RX,
};
static struct platform_device *evm_snd_device;
static int __init evm_init(void)
{
int ret;
evm_snd_device = platform_device_alloc("soc-audio", 0);
if (!evm_snd_device)
return -ENOMEM;
platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
evm_snd_devdata.dev = &evm_snd_device->dev;
evm_snd_device->dev.platform_data = &evm_snd_data;
ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
ARRAY_SIZE(evm_snd_resources));
if (ret) {
platform_device_put(evm_snd_device);
return ret;
}
ret = platform_device_add(evm_snd_device);
if (ret)
platform_device_put(evm_snd_device);
return ret;
}
static void __exit evm_exit(void)
{
platform_device_unregister(evm_snd_device);
}
module_init(evm_init);
module_exit(evm_exit);
MODULE_AUTHOR("Vladimir Barinov");
MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
MODULE_LICENSE("GPL");

407
sound/soc/davinci/davinci-i2s.c Normal file
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@ -0,0 +1,407 @@
/*
* 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.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include "davinci-pcm.h"
#define DAVINCI_MCBSP_DRR_REG 0x00
#define DAVINCI_MCBSP_DXR_REG 0x04
#define DAVINCI_MCBSP_SPCR_REG 0x08
#define DAVINCI_MCBSP_RCR_REG 0x0c
#define DAVINCI_MCBSP_XCR_REG 0x10
#define DAVINCI_MCBSP_SRGR_REG 0x14
#define DAVINCI_MCBSP_PCR_REG 0x24
#define DAVINCI_MCBSP_SPCR_RRST (1 << 0)
#define DAVINCI_MCBSP_SPCR_RINTM(v) ((v) << 4)
#define DAVINCI_MCBSP_SPCR_XRST (1 << 16)
#define DAVINCI_MCBSP_SPCR_XINTM(v) ((v) << 20)
#define DAVINCI_MCBSP_SPCR_GRST (1 << 22)
#define DAVINCI_MCBSP_SPCR_FRST (1 << 23)
#define DAVINCI_MCBSP_SPCR_FREE (1 << 25)
#define DAVINCI_MCBSP_RCR_RWDLEN1(v) ((v) << 5)
#define DAVINCI_MCBSP_RCR_RFRLEN1(v) ((v) << 8)
#define DAVINCI_MCBSP_RCR_RDATDLY(v) ((v) << 16)
#define DAVINCI_MCBSP_RCR_RWDLEN2(v) ((v) << 21)
#define DAVINCI_MCBSP_XCR_XWDLEN1(v) ((v) << 5)
#define DAVINCI_MCBSP_XCR_XFRLEN1(v) ((v) << 8)
#define DAVINCI_MCBSP_XCR_XDATDLY(v) ((v) << 16)
#define DAVINCI_MCBSP_XCR_XFIG (1 << 18)
#define DAVINCI_MCBSP_XCR_XWDLEN2(v) ((v) << 21)
#define DAVINCI_MCBSP_SRGR_FWID(v) ((v) << 8)
#define DAVINCI_MCBSP_SRGR_FPER(v) ((v) << 16)
#define DAVINCI_MCBSP_SRGR_FSGM (1 << 28)
#define DAVINCI_MCBSP_PCR_CLKRP (1 << 0)
#define DAVINCI_MCBSP_PCR_CLKXP (1 << 1)
#define DAVINCI_MCBSP_PCR_FSRP (1 << 2)
#define DAVINCI_MCBSP_PCR_FSXP (1 << 3)
#define DAVINCI_MCBSP_PCR_CLKRM (1 << 8)
#define DAVINCI_MCBSP_PCR_CLKXM (1 << 9)
#define DAVINCI_MCBSP_PCR_FSRM (1 << 10)
#define DAVINCI_MCBSP_PCR_FSXM (1 << 11)
#define MOD_REG_BIT(val, mask, set) do { \
if (set) { \
val |= mask; \
} else { \
val &= ~mask; \
} \
} while (0)
enum {
DAVINCI_MCBSP_WORD_8 = 0,
DAVINCI_MCBSP_WORD_12,
DAVINCI_MCBSP_WORD_16,
DAVINCI_MCBSP_WORD_20,
DAVINCI_MCBSP_WORD_24,
DAVINCI_MCBSP_WORD_32,
};
static struct davinci_pcm_dma_params davinci_i2s_pcm_out = {
.name = "I2S PCM Stereo out",
};
static struct davinci_pcm_dma_params davinci_i2s_pcm_in = {
.name = "I2S PCM Stereo in",
};
struct davinci_mcbsp_dev {
void __iomem *base;
struct clk *clk;
struct davinci_pcm_dma_params *dma_params[2];
};
static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev,
int reg, u32 val)
{
__raw_writel(val, dev->base + reg);
}
static inline u32 davinci_mcbsp_read_reg(struct davinci_mcbsp_dev *dev, int reg)
{
return __raw_readl(dev->base + reg);
}
static void davinci_mcbsp_start(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
u32 w;
/* Start the sample generator and enable transmitter/receiver */
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST, 1);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 1);
else
MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 1);
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
/* Start frame sync */
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_FRST, 1);
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
}
static void davinci_mcbsp_stop(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
u32 w;
/* Reset transmitter/receiver and sample rate/frame sync generators */
w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST |
DAVINCI_MCBSP_SPCR_FRST, 0);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 0);
else
MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 0);
davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
}
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");

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/*
* 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

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/*
* 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");

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/*
* 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