[ALSA] Davinci ASoC support

Add ASoC support for the TI Davinci SoC and the Davicni-EVM reference board.
It includes:
- ASoC Davinci DMA driver
- ASoC Davinci I2S (Davinci McBSP module based) driver
- ASoC Davinci-EVM reference board

Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 208 insertions, 0 deletions

diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c
new file mode 100644
index 000000000000..fcd165240333
--- /dev/null
+++ b/sound/soc/davinci/davinci-evm.c
@@ -0,0 +1,208 @@
+/*
+ * ASoC driver for TI DAVINCI EVM platform
+ *
+ * Author:      Vladimir Barinov, <vbarinov@ru.mvista.com>
+ * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.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.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/mach-types.h>
+#include <asm/dma.h>
+#include <asm/arch/hardware.h>
+
+#include "../codecs/tlv320aic3x.h"
+#include "davinci-pcm.h"
+#include "davinci-i2s.h"
+
+#define EVM_CODEC_CLOCK 22579200
+
+static int evm_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_codec_dai *codec_dai = rtd->dai->codec_dai;
+        struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
+        int ret = 0;
+
+        /* set codec DAI configuration */
+        ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
+                                         SND_SOC_DAIFMT_CBM_CFM);
+        if (ret < 0)
+                return ret;
+
+        /* set cpu DAI configuration */
+        ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM |
+                                       SND_SOC_DAIFMT_IB_NF);
+        if (ret < 0)
+                return ret;
+
+        /* set the codec system clock */
+        ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, EVM_CODEC_CLOCK,
+                                            SND_SOC_CLOCK_OUT);
+        if (ret < 0)
+                return ret;
+
+        return 0;
+}
+
+static struct snd_soc_ops evm_ops = {
+        .hw_params = evm_hw_params,
+};
+
+/* davinci-evm machine dapm widgets */
+static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
+        SND_SOC_DAPM_HP("Headphone Jack", NULL),
+        SND_SOC_DAPM_LINE("Line Out", NULL),
+        SND_SOC_DAPM_MIC("Mic Jack", NULL),
+        SND_SOC_DAPM_LINE("Line In", NULL),
+};
+
+/* davinci-evm machine audio_mapnections to the codec pins */
+static const char *audio_map[][3] = {
+        /* Headphone connected to HPLOUT, HPROUT */
+        {"Headphone Jack", NULL, "HPLOUT"},
+        {"Headphone Jack", NULL, "HPROUT"},
+
+        /* Line Out connected to LLOUT, RLOUT */
+        {"Line Out", NULL, "LLOUT"},
+        {"Line Out", NULL, "RLOUT"},
+
+        /* Mic connected to (MIC3L | MIC3R) */
+        {"MIC3L", NULL, "Mic Bias 2V"},
+        {"MIC3R", NULL, "Mic Bias 2V"},
+        {"Mic Bias 2V", NULL, "Mic Jack"},
+
+        /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
+        {"LINE1L", NULL, "Line In"},
+        {"LINE2L", NULL, "Line In"},
+        {"LINE1R", NULL, "Line In"},
+        {"LINE2R", NULL, "Line In"},
+
+        {NULL, NULL, NULL},
+};
+
+/* Logic for a aic3x as connected on a davinci-evm */
+static int evm_aic3x_init(struct snd_soc_codec *codec)
+{
+        int i;
+
+        /* Add davinci-evm specific widgets */
+        for (i = 0; i < ARRAY_SIZE(aic3x_dapm_widgets); i++)
+                snd_soc_dapm_new_control(codec, &aic3x_dapm_widgets[i]);
+
+        /* Set up davinci-evm specific audio path audio_map */
+        for (i = 0; audio_map[i][0] != NULL; i++)
+                snd_soc_dapm_connect_input(codec, audio_map[i][0],
+                                           audio_map[i][1], audio_map[i][2]);
+
+        /* not connected */
+        snd_soc_dapm_set_endpoint(codec, "MONO_LOUT", 0);
+        snd_soc_dapm_set_endpoint(codec, "HPLCOM", 0);
+        snd_soc_dapm_set_endpoint(codec, "HPRCOM", 0);
+
+        /* always connected */
+        snd_soc_dapm_set_endpoint(codec, "Headphone Jack", 1);
+        snd_soc_dapm_set_endpoint(codec, "Line Out", 1);
+        snd_soc_dapm_set_endpoint(codec, "Mic Jack", 1);
+        snd_soc_dapm_set_endpoint(codec, "Line In", 1);
+
+        snd_soc_dapm_sync_endpoints(codec);
+
+        return 0;
+}
+
+/* davinci-evm digital audio interface glue - connects codec <--> CPU */
+static struct snd_soc_dai_link evm_dai = {
+        .name = "TLV320AIC3X",
+        .stream_name = "AIC3X",
+        .cpu_dai = &davinci_i2s_dai,
+        .codec_dai = &aic3x_dai,
+        .init = evm_aic3x_init,
+        .ops = &evm_ops,
+};
+
+/* davinci-evm audio machine driver */
+static struct snd_soc_machine snd_soc_machine_evm = {
+        .name = "DaVinci EVM",
+        .dai_link = &evm_dai,
+        .num_links = 1,
+};
+
+/* evm audio private data */
+static struct aic3x_setup_data evm_aic3x_setup = {
+        .i2c_address = 0x1b,
+};
+
+/* evm audio subsystem */
+static struct snd_soc_device evm_snd_devdata = {
+        .machine = &snd_soc_machine_evm,
+        .platform = &davinci_soc_platform,
+        .codec_dev = &soc_codec_dev_aic3x,
+        .codec_data = &evm_aic3x_setup,
+};
+
+static struct resource evm_snd_resources[] = {
+        {
+                .start = DAVINCI_MCBSP_BASE,
+                .end = DAVINCI_MCBSP_BASE + SZ_8K - 1,
+                .flags = IORESOURCE_MEM,
+        },
+};
+
+static struct evm_snd_platform_data evm_snd_data = {
+        .tx_dma_ch      = DM644X_DMACH_MCBSP_TX,
+        .rx_dma_ch      = DM644X_DMACH_MCBSP_RX,
+};
+
+static struct platform_device *evm_snd_device;
+
+static int __init evm_init(void)
+{
+        int ret;
+
+        evm_snd_device = platform_device_alloc("soc-audio", 0);
+        if (!evm_snd_device)
+                return -ENOMEM;
+
+        platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
+        evm_snd_devdata.dev = &evm_snd_device->dev;
+        evm_snd_device->dev.platform_data = &evm_snd_data;
+
+        ret = platform_device_add_resources(evm_snd_device, evm_snd_resources,
+                                            ARRAY_SIZE(evm_snd_resources));
+        if (ret) {
+                platform_device_put(evm_snd_device);
+                return ret;
+        }
+
+        ret = platform_device_add(evm_snd_device);
+        if (ret)
+                platform_device_put(evm_snd_device);
+
+        return ret;
+}
+
+static void __exit evm_exit(void)
+{
+        platform_device_unregister(evm_snd_device);
+}
+
+module_init(evm_init);
+module_exit(evm_exit);
+
+MODULE_AUTHOR("Vladimir Barinov");
+MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
+MODULE_LICENSE("GPL");