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-/*
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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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-
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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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-
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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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-
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-#include <mach/edma.h>
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-
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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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-/*
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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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-
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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->cpu_dai;
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- int fs;
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- int ret = 0;
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-
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- /* Fsref can be 32000, 44100 or 48000. */
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- fs = params_rate(params);
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-
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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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-
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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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-
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- pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
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-
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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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-
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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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-
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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_name = "davinci-mcbsp",
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- .codec_dai_name = "pcm3008-hifi",
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- .codec_name = "pcm3008-codec",
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- .platform_name = "davinci-mcbsp",
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- .ops = &sffsdr_ops,
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-};
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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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- .owner = THIS_MODULE,
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- .dai_link = &sffsdr_dai,
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- .num_links = 1,
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-};
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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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-
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-struct platform_device pcm3008_codec = {
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- .name = "pcm3008-codec",
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- .id = 0,
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- .dev = {
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- .platform_data = &sffsdr_pcm3008_setup,
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- },
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-};
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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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-
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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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-
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-static struct platform_device *sffsdr_snd_device;
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-
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-static int __init sffsdr_init(void)
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-{
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- int ret;
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-
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- if (!machine_is_sffsdr())
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- return -EINVAL;
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-
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- platform_device_register(&pcm3008_codec);
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-
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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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-
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- platform_set_drvdata(sffsdr_snd_device, &snd_soc_sffsdr);
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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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-
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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 resources failed\n");
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- goto error;
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- }
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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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-
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- return ret;
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-
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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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-
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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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- platform_device_unregister(&pcm3008_codec);
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-}
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-
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-module_init(sffsdr_init);
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-module_exit(sffsdr_exit);
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-
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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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Mark Brown