875065491f
One of the issues with the ASoC v1 API which has been addressed in the ASoC v2 work that Liam Girdwood has done is that the ALSA card provided by ASoC is distributed around the ASoC structures. For example, machine wide data such as the struct snd_card are maintained as part of the CODEC data structure, preventing the use of multiple codecs. This has been addressed by refactoring the data structures so that all the data for the ALSA card is contained in a single structure snd_soc_card which replaces the existing snd_soc_machine and snd_soc_device. Begin the process of backporting this by renaming struct snd_soc_machine to struct snd_soc_card, better reflecting its function and bringing it closer to standard ALSA terminology. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
157 lines
3.8 KiB
C
157 lines
3.8 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/plat-sffsdr/sffsdr-fpga.h>
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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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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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/* Set cpu DAI configuration:
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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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ret = snd_soc_dai_set_fmt(cpu_dai,
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SND_SOC_DAIFMT_RIGHT_J |
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SND_SOC_DAIFMT_CBM_CFS |
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SND_SOC_DAIFMT_IB_NF);
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if (ret < 0)
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return ret;
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/* Fsref can be 32000, 44100 or 48000. */
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fs = params_rate(params);
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pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs);
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return sffsdr_fpga_set_codec_fs(fs);
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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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.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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.platform = &davinci_soc_platform,
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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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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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sffsdr_snd_device->dev.platform_data = &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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