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>
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/*
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* overo.c -- SoC audio for Gumstix Overo
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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 <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/mach-types.h>
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#include <mach/hardware.h>
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#include <mach/gpio.h>
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#include <mach/mcbsp.h>
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#include "omap-mcbsp.h"
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#include "omap-pcm.h"
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#include "../codecs/twl4030.h"
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static int overo_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->dai->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
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int ret;
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/* Set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai,
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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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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,
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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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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 overo_ops = {
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.hw_params = overo_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 overo_dai = {
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.name = "TWL4030",
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.stream_name = "TWL4030",
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.cpu_dai = &omap_mcbsp_dai[0],
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.codec_dai = &twl4030_dai,
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.ops = &overo_ops,
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};
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/* Audio machine driver */
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static struct snd_soc_card snd_soc_card_overo = {
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.name = "overo",
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.dai_link = &overo_dai,
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.num_links = 1,
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};
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/* Audio subsystem */
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static struct snd_soc_device overo_snd_devdata = {
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.card = &snd_soc_card_overo,
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.platform = &omap_soc_platform,
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.codec_dev = &soc_codec_dev_twl4030,
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};
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static struct platform_device *overo_snd_device;
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static int __init overo_soc_init(void)
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{
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int ret;
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if (!machine_is_overo()) {
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pr_debug("Not Overo!\n");
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return -ENODEV;
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}
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printk(KERN_INFO "overo SoC init\n");
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overo_snd_device = platform_device_alloc("soc-audio", -1);
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if (!overo_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(overo_snd_device, &overo_snd_devdata);
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overo_snd_devdata.dev = &overo_snd_device->dev;
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*(unsigned int *)overo_dai.cpu_dai->private_data = 1; /* McBSP2 */
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ret = platform_device_add(overo_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(overo_snd_device);
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return ret;
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}
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module_init(overo_soc_init);
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static void __exit overo_soc_exit(void)
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{
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platform_device_unregister(overo_snd_device);
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}
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module_exit(overo_soc_exit);
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MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
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MODULE_DESCRIPTION("ALSA SoC overo");
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MODULE_LICENSE("GPL");
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