[ARM] sound: soc: tegra: wm8753 codec interface

Adding support for Audio codec wm8753.
This is an interface between sound and codec driver.

Change-Id: Iabf5ab17b40617d62cfebda93a0742f77f4f9013
Reviewed-on: http://git-master/r/16014
Tested-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

2 files changed, 239 insertions, 0 deletions

diff --git a/sound/soc/tegra/Makefile b/sound/soc/tegra/Makefile
index afd353f62f9e..d7fa52bc28f2 100644
--- a/sound/soc/tegra/Makefile
+++ b/sound/soc/tegra/Makefile
@@ -3,5 +3,6 @@ obj-$(CONFIG_TEGRA_PCM)         += tegra_pcm.o
 obj-$(CONFIG_TEGRA_I2S)         += tegra_i2s.o
 obj-$(CONFIG_TEGRA_ALSA)        += tegra_soc_controls.o
 obj-${CONFIG_SND_SOC_WM8903}    += tegra_soc_wm8903.o
+obj-${CONFIG_SND_SOC_WM8753}    += tegra_soc_wm8753.o
 
 
diff --git a/sound/soc/tegra/tegra_soc_wm8753.c b/sound/soc/tegra/tegra_soc_wm8753.c
new file mode 100644
index 000000000000..8817776327ce
--- /dev/null
+++ b/sound/soc/tegra/tegra_soc_wm8753.c
@@ -0,0 +1,238 @@
+/*
+ * tegra_soc_wm8753.c
+ *
+ * Author: Sachin Nikam
+ *         snikam@nvidia.com
+ *
+ * Copyright (c) 2010, NVIDIA Corporation.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include "tegra_soc.h"
+#include "../codecs/wm8753.h"
+
+#define WM8753_PWR1_VMIDSEL_EN	0x80 /* Vmid divider enable and select */
+#define WM8753_PWR1_VREF_EN		0x40 /* VREF Enable */
+#define WM8753_PWR1_DACL_EN		0x08 /* DAC Left Enable */
+#define WM8753_PWR1_DACR_EN		0x04 /* VREF Enable */
+
+#define WM8753_PWR3_LOU1_EN		0x100 /* LOUT1 Enable */
+#define WM8753_PWR3_ROU1_EN		0x70 /* ROUT1 Enable */
+
+#define WM8753_PWR4_RIGHTMIX_EN	0x02 /* Right mixer enable */
+#define WM8753_PWR4_LEFTMIX_EN	0x01 /* Left mixer enable */
+
+#define WM8753_LOUTM1_LD2LO		0x100 /* Left DAC to Left Mixer */
+#define WM8753_LOUTM1_LM2LO		0x80
+#define WM8753_LOUTM1_LM2LOVOL	0x70 /* LM Signal to Left Mixer Volume */
+
+#define WM8753_ROUTM1_RD2RO		0x100 /* Right DAC to Right Mixer */
+#define WM8753_ROUTM1_RM2RO		0x80
+#define WM8753_ROUTM1_RM2ROVOL	0x70 /* RM Signal to Right Mixer Volume */
+
+static struct platform_device *tegra_snd_device;
+
+extern struct snd_soc_dai tegra_i2s_dai;
+extern struct snd_soc_platform tegra_soc_platform;
+
+static int tegra_hifi_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->dai->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+	int ret = 0, value = 0;
+
+	/* set codec DAI configuration */
+	ret = snd_soc_dai_set_fmt(codec_dai,
+		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+		SND_SOC_DAIFMT_CBM_CFM);
+	if (ret < 0) {
+		printk(KERN_ERR "codec_dai fmt not set\n");
+		return ret;
+	}
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai,
+		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+		SND_SOC_DAIFMT_CBM_CFM);
+	if (ret < 0) {
+		printk(KERN_ERR "cpu_dai fmt not set\n");
+		return ret;
+	}
+
+	/* set the codec system clock for DAC and ADC */
+	ret = snd_soc_dai_set_sysclk(codec_dai, 0, I2S_CLK,
+		SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		printk(KERN_ERR "codec_dai clock not set\n");
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, I2S_CLK,
+		SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		printk(KERN_ERR "cpu_dai clock not set\n");
+		return ret;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		value = snd_soc_read(codec_dai->codec, WM8753_PWR1);
+		value |= WM8753_PWR1_VMIDSEL_EN | WM8753_PWR1_VREF_EN |
+					WM8753_PWR1_DACL_EN |WM8753_PWR1_DACR_EN;
+		snd_soc_write(codec_dai->codec, WM8753_PWR1, value);
+
+		value = snd_soc_read(codec_dai->codec, WM8753_PWR3);
+		value |= WM8753_PWR3_LOU1_EN | WM8753_PWR3_ROU1_EN;
+		snd_soc_write(codec_dai->codec, WM8753_PWR3, value);
+
+		value = snd_soc_read(codec_dai->codec, WM8753_PWR4);
+		value |= WM8753_PWR4_RIGHTMIX_EN | WM8753_PWR4_LEFTMIX_EN;
+		snd_soc_write(codec_dai->codec, WM8753_PWR4, value);
+
+		value = snd_soc_read(codec_dai->codec, WM8753_LOUTM1);
+		value |= WM8753_LOUTM1_LD2LO | WM8753_LOUTM1_LM2LO |
+				WM8753_LOUTM1_LM2LOVOL;
+		snd_soc_write(codec_dai->codec, WM8753_LOUTM1, value);
+
+		value = snd_soc_read(codec_dai->codec, WM8753_ROUTM1);
+		value |= WM8753_ROUTM1_RD2RO | WM8753_ROUTM1_RM2RO |
+				WM8753_ROUTM1_RM2ROVOL;
+		snd_soc_write(codec_dai->codec, WM8753_ROUTM1, value);
+	}
+
+	return 0;
+}
+
+
+static int tegra_hifi_hw_free(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static struct snd_soc_ops tegra_hifi_ops = {
+	.hw_params = tegra_hifi_hw_params,
+	.hw_free = tegra_hifi_hw_free,
+};
+
+static int tegra_voice_hw_params(
+	struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params)
+{
+	return 0;
+}
+
+static int tegra_voice_hw_free(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static struct snd_soc_ops tegra_voice_ops = {
+	.hw_params = tegra_voice_hw_params,
+	.hw_free = tegra_voice_hw_free,
+};
+
+static int tegra_codec_init(struct snd_soc_codec *codec)
+{
+	return tegra_controls_init(codec);
+}
+
+static struct snd_soc_dai bt_dai = {
+	.name = "Bluetooth",
+	.id = 0,
+	.playback = {
+		.channels_min = 1,
+		.channels_max = 1,
+		.rates = SNDRV_PCM_RATE_8000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+	.capture = {
+		.channels_min = 1,
+		.channels_max = 1,
+		.rates = SNDRV_PCM_RATE_8000,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+};
+
+static struct snd_soc_dai_link tegra_soc_dai[] = {
+	{ /* Hifi Playback - for similatious use with voice below */
+		.name = "WM8753",
+		.stream_name = "WM8753 HiFi",
+		.cpu_dai = &tegra_i2s_dai,
+		.codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
+		.init = tegra_codec_init,
+		.ops = &tegra_hifi_ops,
+	},
+	{ /* Voice via BT */
+		.name = "Bluetooth",
+		.stream_name = "Voice",
+		.cpu_dai = &bt_dai,
+		.codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
+		.ops = &tegra_voice_ops,
+	},
+};
+
+static struct snd_soc_card tegra_snd_soc = {
+	.name = "tegra",
+	.platform = &tegra_soc_platform,
+	.dai_link = tegra_soc_dai,
+	.num_links = 1,
+};
+
+static struct snd_soc_device tegra_snd_devdata = {
+	.card = &tegra_snd_soc,
+	.codec_dev = &soc_codec_dev_wm8753,
+};
+
+static int __init tegra_init(void)
+{
+	int ret = 0;
+
+	tegra_snd_device = platform_device_alloc("soc-audio", -1);
+	if (!tegra_snd_device) {
+		pr_err("failed to allocate soc-audio \n");
+		return ENOMEM;
+	}
+
+	platform_set_drvdata(tegra_snd_device, &tegra_snd_devdata);
+	tegra_snd_devdata.dev = &tegra_snd_device->dev;
+	ret = platform_device_add(tegra_snd_device);
+	if (ret) {
+		pr_err("audio device could not be added \n");
+		goto fail;
+	}
+
+	return 0;
+
+fail:
+	if (tegra_snd_device) {
+		platform_device_put(tegra_snd_device);
+		tegra_snd_device = 0;
+	}
+
+	return ret;
+}
+
+static void __exit tegra_exit(void)
+{
+	tegra_controls_exit();
+	platform_device_unregister(tegra_snd_device);
+}
+
+module_init(tegra_init);
+module_exit(tegra_exit);
+
+/* Module information */
+MODULE_DESCRIPTION("Tegra ALSA SoC");
+MODULE_LICENSE("GPL");