7154b3e802
Add Voice DAI to support the PCM voice interface of the twl4030 codec.
The PCM voice interface can be used with 8-kHz(voice narrowband) or
16-kHz(voice wideband) sampling rates, and 16bits, and mono RX and mono
TX or stereo TX.
The PCM voice interface has two modes
- PCM mode1 : This uses the normal FS polarity and the rising edge of
the clock signal.
- PCM mode2 : This uses the FS polarity inverted and the falling edge
of the clock signal.
If the system master clock is not 26MHz or the twl4030 codec mode is not
option2, the voice PCM interface is not available.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
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[TWL4030_DAI_HIFI],
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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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.platform = &omap_soc_platform,
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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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.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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