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-rw-r--r--sound/soc/omap/gta04-voice.c181
1 files changed, 181 insertions, 0 deletions
diff --git a/sound/soc/omap/gta04-voice.c b/sound/soc/omap/gta04-voice.c
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+/*
+ * 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 = &gtm601_dai,
+ .codec_dai_name = "gtm601_codec_audio",
+ .init = gta04_voice_init,
+ .ops = &gta04_voice_ops,
+};
+
+/* voice machine driver */
+static struct snd_soc_card gta04_voice_card = {
+ .name = "gta04-voice",
+// .platform = &omap_soc_platform,
+ .dai_link = &gta04_voice_dai,
+ .num_links = 1,
+};
+
+/* voice subsystem */
+/*static struct snd_soc_device gta04_voice_devdata = {
+ .card = &gta04_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 = &gta04_voice_snd_device->dev;
+
+ platform_set_drvdata(gta04_voice_snd_device, &gta04_voice_card);
+// gta04_voice_devdata.dev = &gta04_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");