179 lines
4.3 KiB
C
179 lines
4.3 KiB
C
/*
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* ASoC driver for Lyrtech SFFSDR board.
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*
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* Author: Hugo Villeneuve
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* Copyright (C) 2008 Lyrtech inc
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*
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* Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow:
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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 <linux/gpio.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/dma.h>
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#include <asm/mach-types.h>
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#ifdef CONFIG_SFFSDR_FPGA
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#include <asm/plat-sffsdr/sffsdr-fpga.h>
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#endif
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#include <mach/mcbsp.h>
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#include <mach/edma.h>
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#include "../codecs/pcm3008.h"
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#include "davinci-pcm.h"
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#include "davinci-i2s.h"
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/*
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* CLKX and CLKR are the inputs for the Sample Rate Generator.
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* FSX and FSR are outputs, driven by the sample Rate Generator.
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*/
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#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
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SND_SOC_DAIFMT_CBM_CFS | \
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SND_SOC_DAIFMT_IB_NF)
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static int sffsdr_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_dai *cpu_dai = rtd->dai->cpu_dai;
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int fs;
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int ret = 0;
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/* Fsref can be 32000, 44100 or 48000. */
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fs = params_rate(params);
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#ifndef CONFIG_SFFSDR_FPGA
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/* Without the FPGA module, the Fs is fixed at 44100 Hz */
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if (fs != 44100) {
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pr_debug("warning: only 44.1 kHz is supported without SFFSDR FPGA module\n");
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return -EINVAL;
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}
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#endif
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/* set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
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if (ret < 0)
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return ret;
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pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
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#ifndef CONFIG_SFFSDR_FPGA
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return 0;
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#else
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return sffsdr_fpga_set_codec_fs(fs);
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#endif
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}
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static struct snd_soc_ops sffsdr_ops = {
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.hw_params = sffsdr_hw_params,
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};
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/* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */
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static struct snd_soc_dai_link sffsdr_dai = {
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.name = "PCM3008", /* Codec name */
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.stream_name = "PCM3008 HiFi",
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.cpu_dai = &davinci_i2s_dai,
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.codec_dai = &pcm3008_dai,
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.ops = &sffsdr_ops,
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};
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/* davinci-sffsdr audio machine driver */
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static struct snd_soc_card snd_soc_sffsdr = {
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.name = "DaVinci SFFSDR",
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.platform = &davinci_soc_platform,
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.dai_link = &sffsdr_dai,
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.num_links = 1,
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};
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/* sffsdr audio private data */
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static struct pcm3008_setup_data sffsdr_pcm3008_setup = {
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.dem0_pin = GPIO(45),
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.dem1_pin = GPIO(46),
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.pdad_pin = GPIO(47),
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.pdda_pin = GPIO(38),
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};
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/* sffsdr audio subsystem */
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static struct snd_soc_device sffsdr_snd_devdata = {
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.card = &snd_soc_sffsdr,
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.codec_dev = &soc_codec_dev_pcm3008,
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.codec_data = &sffsdr_pcm3008_setup,
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};
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static struct resource sffsdr_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 sffsdr_snd_data = {
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.tx_dma_ch = DAVINCI_DMA_MCBSP_TX,
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.rx_dma_ch = DAVINCI_DMA_MCBSP_RX,
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};
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static struct platform_device *sffsdr_snd_device;
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static int __init sffsdr_init(void)
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{
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int ret;
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if (!machine_is_sffsdr())
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return -EINVAL;
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sffsdr_snd_device = platform_device_alloc("soc-audio", 0);
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if (!sffsdr_snd_device) {
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printk(KERN_ERR "platform device allocation failed\n");
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return -ENOMEM;
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}
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platform_set_drvdata(sffsdr_snd_device, &sffsdr_snd_devdata);
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sffsdr_snd_devdata.dev = &sffsdr_snd_device->dev;
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platform_device_add_data(sffsdr_snd_device, &sffsdr_snd_data,
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sizeof(sffsdr_snd_data));
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ret = platform_device_add_resources(sffsdr_snd_device,
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sffsdr_snd_resources,
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ARRAY_SIZE(sffsdr_snd_resources));
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if (ret) {
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printk(KERN_ERR "platform device add ressources failed\n");
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goto error;
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}
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ret = platform_device_add(sffsdr_snd_device);
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if (ret)
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goto error;
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return ret;
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error:
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platform_device_put(sffsdr_snd_device);
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return ret;
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}
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static void __exit sffsdr_exit(void)
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{
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platform_device_unregister(sffsdr_snd_device);
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}
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module_init(sffsdr_init);
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module_exit(sffsdr_exit);
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MODULE_AUTHOR("Hugo Villeneuve");
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MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver");
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MODULE_LICENSE("GPL");
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