/*
* 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/mach-types.h>
#ifdef CONFIG_SFFSDR_FPGA
#include <asm/plat-sffsdr/sffsdr-fpga.h>
#endif
#include <mach/mcbsp.h>
#include <mach/edma.h>
#include "../codecs/pcm3008.h"
#include "davinci-pcm.h"
#include "davinci-i2s.h"
/*
* CLKX and CLKR are the inputs for the Sample Rate Generator.
* FSX and FSR are outputs, driven by the sample Rate Generator.
*/
#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
SND_SOC_DAIFMT_CBM_CFS | \
SND_SOC_DAIFMT_IB_NF)
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;
/* Fsref can be 32000, 44100 or 48000. */
fs = params_rate(params);
#ifndef CONFIG_SFFSDR_FPGA
/* Without the FPGA module, the Fs is fixed at 44100 Hz */
if (fs != 44100) {
pr_debug("warning: only 44.1 kHz is supported without SFFSDR FPGA module\n");
return -EINVAL;
}
#endif
/* set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
if (ret < 0)
return ret;
pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
#ifndef CONFIG_SFFSDR_FPGA
return 0;
#else
return sffsdr_fpga_set_codec_fs(fs);
#endif
}
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_card snd_soc_sffsdr = {
.name = "DaVinci SFFSDR",
.platform = &davinci_soc_platform,
.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 = {
.card = &snd_soc_sffsdr,
.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;
if (!machine_is_sffsdr())
return -EINVAL;
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;
platform_device_add_data(sffsdr_snd_device, &sffsdr_snd_data,
sizeof(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");
