diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/soc/omap/omap3beagle.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/soc/omap/omap3beagle.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/sound/soc/omap/omap3beagle.c b/ANDROID_3.4.5/sound/soc/omap/omap3beagle.c new file mode 100644 index 00000000..2830dfd0 --- /dev/null +++ b/ANDROID_3.4.5/sound/soc/omap/omap3beagle.c @@ -0,0 +1,150 @@ +/* + * omap3beagle.c -- SoC audio for OMAP3 Beagle + * + * Author: Steve Sakoman <steve@sakoman.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <linux/clk.h> +#include <linux/platform_device.h> +#include <linux/module.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> + +#include <asm/mach-types.h> +#include <mach/hardware.h> +#include <mach/gpio.h> +#include <plat/mcbsp.h> + +#include "omap-mcbsp.h" +#include "omap-pcm.h" + +static int omap3beagle_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *codec_dai = rtd->codec_dai; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + unsigned int fmt; + int ret; + + switch (params_channels(params)) { + case 2: /* Stereo I2S mode */ + fmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM; + break; + case 4: /* Four channel TDM mode */ + fmt = SND_SOC_DAIFMT_DSP_A | + SND_SOC_DAIFMT_IB_NF | + SND_SOC_DAIFMT_CBM_CFM; + break; + default: + return -EINVAL; + } + + /* Set codec DAI configuration */ + ret = snd_soc_dai_set_fmt(codec_dai, fmt); + if (ret < 0) { + printk(KERN_ERR "can't set codec DAI configuration\n"); + return ret; + } + + /* Set cpu DAI configuration */ + ret = snd_soc_dai_set_fmt(cpu_dai, fmt); + if (ret < 0) { + printk(KERN_ERR "can't set cpu DAI configuration\n"); + return ret; + } + + /* Set the codec system clock for DAC and ADC */ + ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000, + SND_SOC_CLOCK_IN); + if (ret < 0) { + printk(KERN_ERR "can't set codec system clock\n"); + return ret; + } + + return 0; +} + +static struct snd_soc_ops omap3beagle_ops = { + .hw_params = omap3beagle_hw_params, +}; + +/* Digital audio interface glue - connects codec <--> CPU */ +static struct snd_soc_dai_link omap3beagle_dai = { + .name = "TWL4030", + .stream_name = "TWL4030", + .cpu_dai_name = "omap-mcbsp.2", + .platform_name = "omap-pcm-audio", + .codec_dai_name = "twl4030-hifi", + .codec_name = "twl4030-codec", + .ops = &omap3beagle_ops, +}; + +/* Audio machine driver */ +static struct snd_soc_card snd_soc_omap3beagle = { + .name = "omap3beagle", + .owner = THIS_MODULE, + .dai_link = &omap3beagle_dai, + .num_links = 1, +}; + +static struct platform_device *omap3beagle_snd_device; + +static int __init omap3beagle_soc_init(void) +{ + int ret; + + if (!(machine_is_omap3_beagle() || machine_is_devkit8000())) + return -ENODEV; + pr_info("OMAP3 Beagle/Devkit8000 SoC init\n"); + + omap3beagle_snd_device = platform_device_alloc("soc-audio", -1); + if (!omap3beagle_snd_device) { + printk(KERN_ERR "Platform device allocation failed\n"); + return -ENOMEM; + } + + platform_set_drvdata(omap3beagle_snd_device, &snd_soc_omap3beagle); + + ret = platform_device_add(omap3beagle_snd_device); + if (ret) + goto err1; + + return 0; + +err1: + printk(KERN_ERR "Unable to add platform device\n"); + platform_device_put(omap3beagle_snd_device); + + return ret; +} + +static void __exit omap3beagle_soc_exit(void) +{ + platform_device_unregister(omap3beagle_snd_device); +} + +module_init(omap3beagle_soc_init); +module_exit(omap3beagle_soc_exit); + +MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>"); +MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle"); +MODULE_LICENSE("GPL"); |