151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/*
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* omap3beagle.c -- SoC audio for OMAP3 Beagle
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*
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* Author: Steve Sakoman <steve@sakoman.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <linux/module.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 <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <mach/gpio.h>
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#include <plat/mcbsp.h>
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#include "omap-mcbsp.h"
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#include "omap-pcm.h"
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static int omap3beagle_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 *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned int fmt;
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int ret;
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switch (params_channels(params)) {
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case 2: /* Stereo I2S mode */
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fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBM_CFM;
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break;
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case 4: /* Four channel TDM mode */
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fmt = SND_SOC_DAIFMT_DSP_A |
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SND_SOC_DAIFMT_IB_NF |
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SND_SOC_DAIFMT_CBM_CFM;
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break;
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default:
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return -EINVAL;
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}
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/* Set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai, fmt);
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if (ret < 0) {
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printk(KERN_ERR "can't set codec DAI configuration\n");
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return ret;
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}
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/* Set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
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if (ret < 0) {
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printk(KERN_ERR "can't set cpu DAI configuration\n");
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return ret;
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}
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/* Set the codec system clock for DAC and ADC */
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
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SND_SOC_CLOCK_IN);
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if (ret < 0) {
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printk(KERN_ERR "can't set codec system clock\n");
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return ret;
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}
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return 0;
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}
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static struct snd_soc_ops omap3beagle_ops = {
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.hw_params = omap3beagle_hw_params,
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};
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/* Digital audio interface glue - connects codec <--> CPU */
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static struct snd_soc_dai_link omap3beagle_dai = {
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.name = "TWL4030",
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.stream_name = "TWL4030",
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.cpu_dai_name = "omap-mcbsp.2",
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.platform_name = "omap-pcm-audio",
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.codec_dai_name = "twl4030-hifi",
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.codec_name = "twl4030-codec",
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.ops = &omap3beagle_ops,
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};
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/* Audio machine driver */
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static struct snd_soc_card snd_soc_omap3beagle = {
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.name = "omap3beagle",
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.owner = THIS_MODULE,
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.dai_link = &omap3beagle_dai,
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.num_links = 1,
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};
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static struct platform_device *omap3beagle_snd_device;
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static int __init omap3beagle_soc_init(void)
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{
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int ret;
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if (!(machine_is_omap3_beagle() || machine_is_devkit8000()))
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return -ENODEV;
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pr_info("OMAP3 Beagle/Devkit8000 SoC init\n");
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omap3beagle_snd_device = platform_device_alloc("soc-audio", -1);
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if (!omap3beagle_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(omap3beagle_snd_device, &snd_soc_omap3beagle);
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ret = platform_device_add(omap3beagle_snd_device);
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if (ret)
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goto err1;
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return 0;
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err1:
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printk(KERN_ERR "Unable to add platform device\n");
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platform_device_put(omap3beagle_snd_device);
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return ret;
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}
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static void __exit omap3beagle_soc_exit(void)
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{
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platform_device_unregister(omap3beagle_snd_device);
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}
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module_init(omap3beagle_soc_init);
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module_exit(omap3beagle_soc_exit);
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MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
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MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle");
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MODULE_LICENSE("GPL");
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