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Diffstat (limited to 'sound/soc/omap/gta04-voice.c')
-rw-r--r-- | sound/soc/omap/gta04-voice.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/sound/soc/omap/gta04-voice.c b/sound/soc/omap/gta04-voice.c new file mode 100644 index 0000000..4c475edf --- /dev/null +++ b/sound/soc/omap/gta04-voice.c @@ -0,0 +1,181 @@ +/* + * Copyright (C) 2011 John Ogness + * Author: John Ogness <john.ogness@linutronix.de> + * + * based on sound/soc/omap/omap3beagle.c by + * 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 as published by the + * Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, + * whether express or implied; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include <linux/platform_device.h> + +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> + +#include "omap-mcbsp.h" +#include "omap-pcm.h" +#include "../codecs/gtm601.h" + +static int gta04_voice_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + /* setup codec dai and cpu dai hardware params */ + struct snd_soc_pcm_runtime *rtd = substream->private_data; +// struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + unsigned int fmt; + int ret; + + fmt = SND_SOC_DAIFMT_I2S | // I2S + // SND_SOC_DAIFMT_GATED | // try to power down if not needed + SND_SOC_DAIFMT_IB_IF | // positive sync pulse, driven on rising, sampled on falling clock + SND_SOC_DAIFMT_CBM_CFM; // clocks come from GSM modem + +#if 0 // set clocks to be outputs + + fmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_IB_IF | + SND_SOC_DAIFMT_CBS_CFS; + +#endif + /* 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; + } + +#if 0 // for testing we switch to output - don't use on a board with GTM601 installed!!! + ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLK, 26000000, + SND_SOC_CLOCK_OUT); + // set divider... +#else + ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKX_EXT, 0, + SND_SOC_CLOCK_IN); + if(cpu_dai == 0) { + /* + * could be necessary if we connect to McBSP1 - but we are on McBSP4 + * see http://mailman.alsa-project.org/pipermail/alsa-devel/2009-August/020771.html + */ + if(ret >= 0) + ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_CLKR_SRC_CLKX, 0, + SND_SOC_CLOCK_IN); + if(ret >= 0) + ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_FSR_SRC_FSX, 0, + SND_SOC_CLOCK_IN); + } +#endif + if (ret < 0) { + printk(KERN_ERR "can't set cpu system clock\n"); + return ret; + } + + return 0; +} + +static int gta04_voice_init(struct snd_soc_codec *codec) +{ + /* add controls */ + /* add routes */ + /* setup pins */ + struct snd_soc_dapm_context *dapm = &codec->dapm; + snd_soc_dapm_sync(dapm); + return 0; +} + +static int gta04_voice_startup(struct snd_pcm_substream *substream) +{ + /* enable clock used by codec */ + /* clock is provided by the GTM601 */ + return 0; +} + +static void gta04_voice_shutdown(struct snd_pcm_substream *substream) +{ + /* disable clock used by codec */ + /* clock is provided by the GTM601 */ +} + +static struct snd_soc_ops gta04_voice_ops = { + .startup = gta04_voice_startup, + .hw_params = gta04_voice_hw_params, + .shutdown = gta04_voice_shutdown, +}; + +/* digital voice interface glue - connects codec <--> cpu */ +static struct snd_soc_dai_link gta04_voice_dai = { + .name = "GTM601", + .stream_name = "GTM601", +// .cpu_dai = &omap_mcbsp_dai[1], + .cpu_dai_name = "omap-mcpdm-dai.1", +// .codec_dai = >m601_dai, + .codec_dai_name = "gtm601_codec_audio", + .init = gta04_voice_init, + .ops = >a04_voice_ops, +}; + +/* voice machine driver */ +static struct snd_soc_card gta04_voice_card = { + .name = "gta04-voice", +// .platform = &omap_soc_platform, + .dai_link = >a04_voice_dai, + .num_links = 1, +}; + +/* voice subsystem */ +/*static struct snd_soc_device gta04_voice_devdata = { + .card = >a04_voice_card, + .codec_dev = &soc_codec_dev_gtm601, +};*/ + +static struct platform_device *gta04_voice_snd_device; + +static int __init gta04_voice_soc_init(void) +{ + struct device *dev; + int ret; + + pr_info("gta04-voice SoC init\n"); + + gta04_voice_snd_device = platform_device_alloc("soc-audio", 1); + if (!gta04_voice_snd_device) { + printk(KERN_ERR "platform device allocation failed\n"); + return -ENOMEM; + } + + dev = >a04_voice_snd_device->dev; + + platform_set_drvdata(gta04_voice_snd_device, >a04_voice_card); +// gta04_voice_devdata.dev = >a04_voice_snd_device->dev; +// *(unsigned int *)gta04_voice_dai.cpu_dai->private_data = 3; // McBSP4 + + ret = platform_device_add(gta04_voice_snd_device); + if (ret) { + printk(KERN_ERR "unable to add platform device\n"); + platform_device_put(gta04_voice_snd_device); + } + + return ret; +} + +static void __exit gta04_voice_soc_exit(void) +{ + platform_device_unregister(gta04_voice_snd_device); +} + +module_init(gta04_voice_soc_init); +module_exit(gta04_voice_soc_exit); + +MODULE_AUTHOR("John Ogness <john.ogness@linutronix.de>"); +MODULE_DESCRIPTION("ALSA SoC GTA04 Voice"); +MODULE_LICENSE("GPL v2"); |