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Commit 08bd1686 authored by Hugo Villeneuve's avatar Hugo Villeneuve Committed by Mark Brown
Browse files

ASoC: Add driver for the Lyrtech SFFSDR board 



The PCM3008 is used on the Lyrtech SFFSDR board, in conjunction with an
FPGA that generates the bit clock and the master clock

[Downgraded the rate debug print to pr_debug() in hw_params, converted
asm/gpio.h to linux/gpio.h -- broonie]

Signed-off-by: default avatarHugo Villeneuve <hugo@hugovil.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 1c0090c2

sound/soc/davinci/Kconfig

+10 −0
Original line number Original line Diff line number Diff line
@@ -17,3 +17,13 @@ config SND_DAVINCI_SOC_EVM 
	help

	help

	  Say Y if you want to add support for SoC audio on TI

	  Say Y if you want to add support for SoC audio on TI

	  DaVinci EVM platform.

	  DaVinci EVM platform.



config SND_DAVINCI_SOC_SFFSDR

	tristate "SoC Audio support for SFFSDR"

	depends on SND_DAVINCI_SOC && MACH_DAVINCI_SFFSDR

	select SND_DAVINCI_SOC_I2S

	select SND_SOC_PCM3008

	select SFFSDR_FPGA

	help

	  Say Y if you want to add support for SoC audio on

	  Lyrtech SFFSDR board.

sound/soc/davinci/Makefile

+2 −0
Original line number Original line Diff line number Diff line
@@ -7,5 +7,7 @@ obj-$(CONFIG_SND_DAVINCI_SOC_I2S) += snd-soc-davinci-i2s.o 




# DAVINCI Machine Support

# DAVINCI Machine Support

snd-soc-evm-objs := davinci-evm.o

snd-soc-evm-objs := davinci-evm.o

snd-soc-sffsdr-objs := davinci-sffsdr.o





obj-$(CONFIG_SND_DAVINCI_SOC_EVM) += snd-soc-evm.o

obj-$(CONFIG_SND_DAVINCI_SOC_EVM) += snd-soc-evm.o

obj-$(CONFIG_SND_DAVINCI_SOC_SFFSDR) += snd-soc-sffsdr.o

sound/soc/davinci/davinci-sffsdr.c

0 → 100644
+156 −0
Original line number Original line Diff line number Diff line 
/*

 * ASoC driver for Lyrtech SFFSDR board.

 *

 * Author:	Hugo Villeneuve

 * Copyright (C) 2008 Lyrtech inc

 *

 * Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow:

 * 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 <linux/gpio.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>



#include <asm/dma.h>

#include <asm/plat-sffsdr/sffsdr-fpga.h>



#include <mach/mcbsp.h>

#include <mach/edma.h>



#include "../codecs/pcm3008.h"

#include "davinci-pcm.h"

#include "davinci-i2s.h"



static int sffsdr_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_dai *cpu_dai = rtd->dai->cpu_dai;

	int fs;

	int ret = 0;



	/* Set cpu DAI configuration:

	 * CLKX and CLKR are the inputs for the Sample Rate Generator.

	 * FSX and FSR are outputs, driven by the sample Rate Generator. */

	ret = snd_soc_dai_set_fmt(cpu_dai,

				  SND_SOC_DAIFMT_RIGHT_J |

				  SND_SOC_DAIFMT_CBM_CFS |

				  SND_SOC_DAIFMT_IB_NF);

	if (ret < 0)

		return ret;



	/* Fsref can be 32000, 44100 or 48000. */

	fs = params_rate(params);



	pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);



	return sffsdr_fpga_set_codec_fs(fs);

}



static struct snd_soc_ops sffsdr_ops = {

	.hw_params = sffsdr_hw_params,

};



/* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */

static struct snd_soc_dai_link sffsdr_dai = {

	.name = "PCM3008", /* Codec name */

	.stream_name = "PCM3008 HiFi",

	.cpu_dai = &davinci_i2s_dai,

	.codec_dai = &pcm3008_dai,

	.ops = &sffsdr_ops,

};



/* davinci-sffsdr audio machine driver */

static struct snd_soc_machine snd_soc_machine_sffsdr = {

	.name = "DaVinci SFFSDR",

	.dai_link = &sffsdr_dai,

	.num_links = 1,

};



/* sffsdr audio private data */

static struct pcm3008_setup_data sffsdr_pcm3008_setup = {

	.dem0_pin = GPIO(45),

	.dem1_pin = GPIO(46),

	.pdad_pin = GPIO(47),

	.pdda_pin = GPIO(38),

};



/* sffsdr audio subsystem */

static struct snd_soc_device sffsdr_snd_devdata = {

	.machine = &snd_soc_machine_sffsdr,

	.platform = &davinci_soc_platform,

	.codec_dev = &soc_codec_dev_pcm3008,

	.codec_data = &sffsdr_pcm3008_setup,

};



static struct resource sffsdr_snd_resources[] = {

	{

		.start = DAVINCI_MCBSP_BASE,

		.end = DAVINCI_MCBSP_BASE + SZ_8K - 1,

		.flags = IORESOURCE_MEM,

	},

};



static struct evm_snd_platform_data sffsdr_snd_data = {

	.tx_dma_ch	= DAVINCI_DMA_MCBSP_TX,

	.rx_dma_ch	= DAVINCI_DMA_MCBSP_RX,

};



static struct platform_device *sffsdr_snd_device;



static int __init sffsdr_init(void)

{

	int ret;



	sffsdr_snd_device = platform_device_alloc("soc-audio", 0);

	if (!sffsdr_snd_device) {

		printk(KERN_ERR "platform device allocation failed\n");

		return -ENOMEM;

	}



	platform_set_drvdata(sffsdr_snd_device, &sffsdr_snd_devdata);

	sffsdr_snd_devdata.dev = &sffsdr_snd_device->dev;

	sffsdr_snd_device->dev.platform_data = &sffsdr_snd_data;



	ret = platform_device_add_resources(sffsdr_snd_device,

					    sffsdr_snd_resources,

					    ARRAY_SIZE(sffsdr_snd_resources));

	if (ret) {

		printk(KERN_ERR "platform device add ressources failed\n");

		goto error;

	}



	ret = platform_device_add(sffsdr_snd_device);

	if (ret)

		goto error;



	return ret;



error:

	platform_device_put(sffsdr_snd_device);

	return ret;

}



static void __exit sffsdr_exit(void)

{

	platform_device_unregister(sffsdr_snd_device);

}



module_init(sffsdr_init);

module_exit(sffsdr_exit);



MODULE_AUTHOR("Hugo Villeneuve");

MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver");

MODULE_LICENSE("GPL");