Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | /*
* 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 <asm/dma.h>
#include <asm/mach-types.h>
#ifdef CONFIG_SFFSDR_FPGA
#include <asm/plat-sffsdr/sffsdr-fpga.h>
#endif
#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->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_name = "davinci-mcbsp",
.codec_dai_name = "pcm3008-hifi",
.codec_name = "pcm3008-codec",
.platform_name = "davinci-pcm-audio",
.ops = &sffsdr_ops,
};
/* davinci-sffsdr audio machine driver */
static struct snd_soc_card snd_soc_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),
};
struct platform_device pcm3008_codec = {
.name = "pcm3008-codec",
.id = 0,
.dev = {
.platform_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;
platform_device_register(&pcm3008_codec);
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, &snd_soc_sffsdr);
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 resources 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);
platform_device_unregister(&pcm3008_codec);
}
module_init(sffsdr_init);
module_exit(sffsdr_exit);
MODULE_AUTHOR("Hugo Villeneuve");
MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver");
MODULE_LICENSE("GPL");
|