[PATCH V5 1/2] ASoC: STA529: Add support for STA529 Audio Codec

[PATCH V5 1/2] ASoC: STA529: Add support for STA529 Audio Codec

[Rajeev Kumar]

The STA529 is a digital stereo class-D audio amplifier. It includes an
audio DSP, an ST proprietary high-efficiency class-D driver and CMOS
power output stage. It is intended for high-efficiency
digital-to-power-audio conversion for portable applications.

Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
---
 sound/soc/codecs/Kconfig  |    4 +
 sound/soc/codecs/Makefile |    2 +
 sound/soc/codecs/sta529.c |  441 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 447 insertions(+), 0 deletions(-)
 create mode 100644 sound/soc/codecs/sta529.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 1de24cc..bbcb038 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -57,6 +57,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_SPDIF
 	select SND_SOC_SSM2602 if SND_SOC_I2C_AND_SPI
 	select SND_SOC_STA32X if I2C
+	select SND_SOC_STA529 if I2C
 	select SND_SOC_STAC9766 if SND_SOC_AC97_BUS
 	select SND_SOC_TLV320AIC23 if I2C
 	select SND_SOC_TLV320AIC26 if SPI_MASTER
@@ -284,6 +285,9 @@ config SND_SOC_SSM2602
 config SND_SOC_STA32X
 	tristate
 
+config SND_SOC_STA529
+	tristate
+
 config SND_SOC_STAC9766
 	tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index acf8088..8da3d22 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -49,6 +49,7 @@ snd-soc-spdif-tx-objs := spdif_transciever.o
 snd-soc-spdif-rx-objs := spdif_receiver.o
 snd-soc-ssm2602-objs := ssm2602.o
 snd-soc-sta32x-objs := sta32x.o
+snd-soc-sta529-objs := sta529.o
 snd-soc-stac9766-objs := stac9766.o
 snd-soc-tlv320aic23-objs := tlv320aic23.o
 snd-soc-tlv320aic26-objs := tlv320aic26.o
@@ -163,6 +164,7 @@ obj-$(CONFIG_SND_SOC_SN95031)	+=snd-soc-sn95031.o
 obj-$(CONFIG_SND_SOC_SPDIF)	+= snd-soc-spdif-rx.o snd-soc-spdif-tx.o
 obj-$(CONFIG_SND_SOC_SSM2602)	+= snd-soc-ssm2602.o
 obj-$(CONFIG_SND_SOC_STA32X)   += snd-soc-sta32x.o
+obj-$(CONFIG_SND_SOC_STA529)   += snd-soc-sta529.o
 obj-$(CONFIG_SND_SOC_STAC9766)	+= snd-soc-stac9766.o
 obj-$(CONFIG_SND_SOC_TLV320AIC23)	+= snd-soc-tlv320aic23.o
 obj-$(CONFIG_SND_SOC_TLV320AIC26)	+= snd-soc-tlv320aic26.o
diff --git a/sound/soc/codecs/sta529.c b/sound/soc/codecs/sta529.c
new file mode 100644
index 0000000..a9f34c7
--- /dev/null
+++ b/sound/soc/codecs/sta529.c
@@ -0,0 +1,441 @@
+/*
+ * ASoC codec driver for spear platform
+ *
+ * sound/soc/codecs/sta529.c -- spear ALSA Soc codec driver
+ *
+ * Copyright (C) 2012 ST Microelectronics
+ * Rajeev Kumar <rajeev-dlh.kumar@st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/pm.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+
+/* STA529 Register offsets */
+#define	 STA529_FFXCFG0		0x00
+#define	 STA529_FFXCFG1		0x01
+#define	 STA529_MVOL		0x02
+#define	 STA529_LVOL		0x03
+#define	 STA529_RVOL		0x04
+#define	 STA529_TTF0		0x05
+#define	 STA529_TTF1		0x06
+#define	 STA529_TTP0		0x07
+#define	 STA529_TTP1		0x08
+#define	 STA529_S2PCFG0		0x0A
+#define	 STA529_S2PCFG1		0x0B
+#define	 STA529_P2SCFG0		0x0C
+#define	 STA529_P2SCFG1		0x0D
+#define	 STA529_PLLCFG0		0x14
+#define	 STA529_PLLCFG1		0x15
+#define	 STA529_PLLCFG2		0x16
+#define	 STA529_PLLCFG3		0x17
+#define	 STA529_PLLPFE		0x18
+#define	 STA529_PLLST		0x19
+#define	 STA529_ADCCFG		0x1E /*mic_select*/
+#define	 STA529_CKOCFG		0x1F
+#define	 STA529_MISC		0x20
+#define	 STA529_PADST0		0x21
+#define	 STA529_PADST1		0x22
+#define	 STA529_FFXST		0x23
+#define	 STA529_PWMIN1		0x2D
+#define	 STA529_PWMIN2		0x2E
+#define	 STA529_POWST		0x32
+
+#define STA529_MAX_REGISTER	0x32
+
+#define STA529_RATES		(SNDRV_PCM_RATE_8000 | \
+				SNDRV_PCM_RATE_11025 | \
+				SNDRV_PCM_RATE_16000 | \
+				SNDRV_PCM_RATE_22050 | \
+				SNDRV_PCM_RATE_32000 | \
+				SNDRV_PCM_RATE_44100 | \
+				SNDRV_PCM_RATE_48000)
+
+#define STA529_FORMAT		(SNDRV_PCM_FMTBIT_S16_LE | \
+				SNDRV_PCM_FMTBIT_S24_LE | \
+				SNDRV_PCM_FMTBIT_S32_LE)
+#define	S2PC_VALUE		0x98
+#define CLOCK_OUT		0x60
+#define LEFT_J_DATA_FORMAT	0x10
+#define I2S_DATA_FORMAT		0x12
+#define RIGHT_J_DATA_FORMAT	0x14
+#define CODEC_MUTE_VAL		0x80
+
+#define POWER_CNTLMSAK		0x40
+#define POWER_STDBY		0x40
+#define FFX_MASK		0x80
+#define FFX_OFF			0x80
+#define POWER_UP		0x00
+#define FFX_CLK_ENB		0x01
+#define FFX_CLK_DIS		0x00
+#define FFX_CLK_MSK		0x01
+#define PLAY_FREQ_RANGE_MSK	0x70
+#define CAP_FREQ_RANGE_MSK	0x0C
+#define PDATA_LEN_MSK		0xC0
+#define BCLK_TO_FS_MSK		0x30
+#define AUDIO_MUTE_MSK		0x80
+
+static const struct reg_default sta529_reg_defaults[] = {
+	{ 0,  0x35 },     /* R0   - FFX Configuration reg 0 */
+	{ 1,  0xc8 },     /* R1   - FFX Configuration reg 1 */
+	{ 2,  0x50 },     /* R2   - Master Volume */
+	{ 3,  0x00 },     /* R3   - Left Volume */
+	{ 4,  0x00 },     /* R4  -  Right Volume */
+	{ 10, 0xb2 },     /* R10  - S2P Config Reg 0 */
+	{ 11, 0x41 },     /* R11  - S2P Config Reg 1 */
+	{ 12, 0x92 },     /* R12  - P2S Config Reg 0 */
+	{ 13, 0x41 },     /* R13  - P2S Config Reg 1 */
+	{ 30, 0xd2 },     /* R30  - ADC Config Reg */
+	{ 31, 0x40 },     /* R31  - clock Out Reg */
+	{ 32, 0x21 },     /* R32  - Misc Register */
+};
+
+struct sta529 {
+	struct regmap *regmap;
+};
+
+static bool sta529_readable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+
+	case STA529_FFXCFG0:
+	case STA529_FFXCFG1:
+	case STA529_MVOL:
+	case STA529_LVOL:
+	case STA529_RVOL:
+	case STA529_S2PCFG0:
+	case STA529_S2PCFG1:
+	case STA529_P2SCFG0:
+	case STA529_P2SCFG1:
+	case STA529_ADCCFG:
+	case STA529_CKOCFG:
+	case STA529_MISC:
+		return true;
+	default:
+		return false;
+	}
+}
+
+
+static const char *pwm_mode_text[] = { "Binary", "Headphone", "Ternary",
+	"Phase-shift"};
+
+static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -9150, 50, 0);
+static const DECLARE_TLV_DB_SCALE(master_vol_tlv, -12750, 50, 0);
+static const SOC_ENUM_SINGLE_DECL(pwm_src, STA529_FFXCFG1, 4, pwm_mode_text);
+
+static const struct snd_kcontrol_new sta529_snd_controls[] = {
+	SOC_DOUBLE_R_TLV("Digital Playback Volume", STA529_LVOL, STA529_RVOL, 0,
+			127, 0, out_gain_tlv),
+	SOC_SINGLE_TLV("Master Playback Volume", STA529_MVOL, 0, 127, 1,
+			master_vol_tlv),
+	SOC_ENUM("PWM Select", pwm_src),
+};
+
+static int sta529_set_bias_level(struct snd_soc_codec *codec, enum
+		snd_soc_bias_level level)
+{
+	struct sta529 *sta529 = snd_soc_codec_get_drvdata(codec);
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+	case SND_SOC_BIAS_PREPARE:
+		snd_soc_update_bits(codec, STA529_FFXCFG0, POWER_CNTLMSAK,
+				POWER_UP);
+		snd_soc_update_bits(codec, STA529_MISC,	FFX_CLK_MSK,
+				FFX_CLK_ENB);
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+			regcache_sync(sta529->regmap);
+		snd_soc_update_bits(codec, STA529_FFXCFG0,
+					POWER_CNTLMSAK, POWER_STDBY);
+		/* Making FFX output to zero */
+		snd_soc_update_bits(codec, STA529_FFXCFG0, FFX_MASK,
+				FFX_OFF);
+		snd_soc_update_bits(codec, STA529_MISC, FFX_CLK_MSK,
+				FFX_CLK_DIS);
+		break;
+	case SND_SOC_BIAS_OFF:
+		break;
+	}
+
+	/*
+	 * store the label for powers down audio subsystem for suspend.This is
+	 * used by soc core layer
+	 */
+	codec->dapm.bias_level = level;
+
+	return 0;
+
+}
+
+static int sta529_hw_params(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params,
+		struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	int pdata, play_freq_val, record_freq_val;
+	int bclk_to_fs_ratio;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		pdata = 1;
+		bclk_to_fs_ratio = 0;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		pdata = 2;
+		bclk_to_fs_ratio = 1;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		pdata = 3;
+		bclk_to_fs_ratio = 2;
+		break;
+	default:
+		dev_err(codec->dev, "Unsupported format\n");
+		return -EINVAL;
+	}
+
+	switch (params_rate(params)) {
+	case 8000:
+	case 11025:
+		play_freq_val = 0;
+		record_freq_val = 2;
+		break;
+	case 16000:
+	case 22050:
+		play_freq_val = 1;
+		record_freq_val = 0;
+		break;
+
+	case 32000:
+	case 44100:
+	case 48000:
+		play_freq_val = 2;
+		record_freq_val = 0;
+		break;
+	default:
+		dev_err(codec->dev, "Unsupported rate\n");
+		return -EINVAL;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		snd_soc_update_bits(codec, STA529_S2PCFG1, PDATA_LEN_MSK,
+				pdata << 6);
+		snd_soc_update_bits(codec, STA529_S2PCFG1, BCLK_TO_FS_MSK,
+				bclk_to_fs_ratio << 4);
+		snd_soc_update_bits(codec, STA529_MISC, PLAY_FREQ_RANGE_MSK,
+				play_freq_val << 4);
+	} else {
+		snd_soc_update_bits(codec, STA529_P2SCFG1, PDATA_LEN_MSK,
+				pdata << 6);
+		snd_soc_update_bits(codec, STA529_P2SCFG1, BCLK_TO_FS_MSK,
+				bclk_to_fs_ratio << 4);
+		snd_soc_update_bits(codec, STA529_MISC, CAP_FREQ_RANGE_MSK,
+				record_freq_val << 2);
+	}
+
+	return 0;
+}
+
+static int sta529_mute(struct snd_soc_dai *dai, int mute)
+{
+	u8 val = 0;
+
+	if (mute)
+		val |= CODEC_MUTE_VAL;
+
+	snd_soc_update_bits(dai->codec, STA529_FFXCFG0, AUDIO_MUTE_MSK, val);
+
+	return 0;
+}
+
+static int sta529_set_dai_fmt(struct snd_soc_dai *codec_dai, u32 fmt)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	u8 mode = 0;
+
+	/* interface format */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_LEFT_J:
+		mode = LEFT_J_DATA_FORMAT;
+		break;
+	case SND_SOC_DAIFMT_I2S:
+		mode = I2S_DATA_FORMAT;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		mode = RIGHT_J_DATA_FORMAT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_update_bits(codec, STA529_S2PCFG0, 0x0D, mode);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops sta529_dai_ops = {
+	.hw_params	=	sta529_hw_params,
+	.set_fmt	=	sta529_set_dai_fmt,
+	.digital_mute	=	sta529_mute,
+};
+
+static struct snd_soc_dai_driver sta529_dai = {
+	.name = "sta529-audio",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = STA529_RATES,
+		.formats = STA529_FORMAT,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = STA529_RATES,
+		.formats = STA529_FORMAT,
+	},
+	.ops	= &sta529_dai_ops,
+};
+
+static int sta529_probe(struct snd_soc_codec *codec)
+{
+	struct sta529 *sta529 = snd_soc_codec_get_drvdata(codec);
+	int ret;
+
+	codec->control_data = sta529->regmap;
+	ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);
+
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+		return ret;
+	}
+	sta529_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+	return 0;
+}
+
+/* power down chip */
+static int sta529_remove(struct snd_soc_codec *codec)
+{
+	sta529_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+	return 0;
+}
+
+static int sta529_suspend(struct snd_soc_codec *codec)
+{
+	sta529_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+	return 0;
+}
+
+static int sta529_resume(struct snd_soc_codec *codec)
+{
+	sta529_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+	return 0;
+}
+
+struct snd_soc_codec_driver sta529_codec_driver = {
+	.probe = sta529_probe,
+	.remove = sta529_remove,
+	.set_bias_level = sta529_set_bias_level,
+	.suspend = sta529_suspend,
+	.resume = sta529_resume,
+	.controls = sta529_snd_controls,
+	.num_controls = ARRAY_SIZE(sta529_snd_controls),
+};
+
+static const struct regmap_config sta529_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = STA529_MAX_REGISTER,
+	.readable_reg = sta529_readable,
+
+	.cache_type = REGCACHE_RBTREE,
+	.reg_defaults = sta529_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(sta529_reg_defaults),
+};
+
+static __devinit int sta529_i2c_probe(struct i2c_client *i2c,
+		const struct i2c_device_id *id)
+{
+	struct sta529 *sta529;
+	int ret;
+
+	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EINVAL;
+
+	sta529 = devm_kzalloc(&i2c->dev, sizeof(struct sta529), GFP_KERNEL);
+	if (sta529 == NULL) {
+		dev_err(&i2c->dev, "Can not allocate memory\n");
+		return -ENOMEM;
+	}
+
+	sta529->regmap = devm_regmap_init_i2c(i2c, &sta529_regmap);
+	if (IS_ERR(sta529->regmap)) {
+		dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
+		return PTR_ERR(sta529->regmap);
+	}
+
+	i2c_set_clientdata(i2c, sta529);
+
+	ret = snd_soc_register_codec(&i2c->dev,
+			&sta529_codec_driver, &sta529_dai, 1);
+	if (ret != 0)
+		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
+
+	return ret;
+}
+
+static int __devexit sta529_i2c_remove(struct i2c_client *client)
+{
+	snd_soc_unregister_codec(&client->dev);
+
+	return 0;
+}
+
+static const struct i2c_device_id sta529_i2c_id[] = {
+	{ "sta529", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, sta529_i2c_id);
+
+static struct i2c_driver sta529_i2c_driver = {
+	.driver = {
+		.name = "sta529",
+		.owner = THIS_MODULE,
+	},
+	.probe		= sta529_i2c_probe,
+	.remove		= __devexit_p(sta529_i2c_remove),
+	.id_table	= sta529_i2c_id,
+};
+
+module_i2c_driver(sta529_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC STA529 codec driver");
+MODULE_AUTHOR("Rajeev Kumar <rajeev-dlh.kumar@st.com>");
+MODULE_LICENSE("GPL");
-- 
1.7.0.4

[PATCH V5 2/2] ASoC: SPEAr spdif_out: Add spdif out support

[Rajeev Kumar]

From: Vipin Kumar <vipin.kumar@st.com>

This patch implements the spdif out driver for ST peripheral. This
peripheral implements IEC60958 standard

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com>
---
 sound/soc/spear/spdif_out.c      |  389 ++++++++++++++++++++++++++++++++++++++
 sound/soc/spear/spdif_out_regs.h |   79 ++++++++
 2 files changed, 468 insertions(+), 0 deletions(-)
 create mode 100644 sound/soc/spear/spdif_out.c
 create mode 100644 sound/soc/spear/spdif_out_regs.h

diff --git a/sound/soc/spear/spdif_out.c b/sound/soc/spear/spdif_out.c
new file mode 100644
index 0000000..5eac4cd
--- /dev/null
+++ b/sound/soc/spear/spdif_out.c
@@ -0,0 +1,389 @@
+/*
+ * ALSA SoC SPDIF Out Audio Layer for spear processors
+ *
+ * Copyright (C) 2012 ST Microelectronics
+ * Vipin Kumar <vipin.kumar@st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <sound/soc.h>
+#include <sound/spear_dma.h>
+#include <sound/spear_spdif.h>
+#include "spdif_out_regs.h"
+
+struct spdif_out_params {
+	u32 rate;
+	u32 core_freq;
+	u32 mute;
+};
+
+struct spdif_out_dev {
+	struct clk *clk;
+	struct spear_dma_data dma_params;
+	struct spdif_out_params saved_params;
+	u32 running;
+	void __iomem *io_base;
+};
+
+static void spdif_out_configure(struct spdif_out_dev *host)
+{
+	writel(SPDIF_OUT_RESET, host->io_base + SPDIF_OUT_SOFT_RST);
+	mdelay(1);
+	writel(readl(host->io_base + SPDIF_OUT_SOFT_RST) & ~SPDIF_OUT_RESET,
+			host->io_base + SPDIF_OUT_SOFT_RST);
+
+	writel(SPDIF_OUT_FDMA_TRIG_16 | SPDIF_OUT_MEMFMT_16_16 |
+			SPDIF_OUT_VALID_HW | SPDIF_OUT_USER_HW |
+			SPDIF_OUT_CHNLSTA_HW | SPDIF_OUT_PARITY_HW,
+			host->io_base + SPDIF_OUT_CFG);
+
+	writel(0x7F, host->io_base + SPDIF_OUT_INT_STA_CLR);
+	writel(0x7F, host->io_base + SPDIF_OUT_INT_EN_CLR);
+}
+
+static int spdif_out_startup(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *cpu_dai)
+{
+	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
+	int ret;
+
+	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+		return -EINVAL;
+
+	snd_soc_dai_set_dma_data(cpu_dai, substream, (void *)&host->dma_params);
+
+	ret = clk_enable(host->clk);
+	if (ret)
+		return ret;
+
+	host->running = true;
+	spdif_out_configure(host);
+
+	return 0;
+}
+
+static void spdif_out_shutdown(struct snd_pcm_substream *substream,
+		struct snd_soc_dai *dai)
+{
+	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
+
+	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+		return;
+
+	clk_disable(host->clk);
+	host->running = false;
+	snd_soc_dai_set_dma_data(dai, substream, NULL);
+}
+
+static void spdif_out_clock(struct spdif_out_dev *host, u32 core_freq,
+		u32 rate)
+{
+	u32 divider, ctrl;
+
+	clk_set_rate(host->clk, core_freq);
+	divider = DIV_ROUND_CLOSEST(clk_get_rate(host->clk), (rate * 128));
+
+	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
+	ctrl &= ~SPDIF_DIVIDER_MASK;
+	ctrl |= (divider << SPDIF_DIVIDER_SHIFT) & SPDIF_DIVIDER_MASK;
+	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
+}
+
+static int spdif_out_hw_params(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params,
+		struct snd_soc_dai *dai)
+{
+	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
+	u32 rate, core_freq;
+
+	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+		return -EINVAL;
+
+	rate = params_rate(params);
+
+	switch (rate) {
+	case 8000:
+	case 16000:
+	case 32000:
+	case 64000:
+		/*
+		 * The clock is multiplied by 10 to bring it to feasible range
+		 * of frequencies for sscg
+		 */
+		core_freq = 64000 * 128 * 10;	/* 81.92 MHz */
+		break;
+	case 5512:
+	case 11025:
+	case 22050:
+	case 44100:
+	case 88200:
+	case 176400:
+		core_freq = 176400 * 128;	/* 22.5792 MHz */
+		break;
+	case 48000:
+	case 96000:
+	case 192000:
+	default:
+		core_freq = 192000 * 128;	/* 24.576 MHz */
+		break;
+	}
+
+	spdif_out_clock(host, core_freq, rate);
+	host->saved_params.core_freq = core_freq;
+	host->saved_params.rate = rate;
+
+	return 0;
+}
+
+static int spdif_out_trigger(struct snd_pcm_substream *substream, int cmd,
+		struct snd_soc_dai *dai)
+{
+	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
+	u32 ctrl;
+	int ret = 0;
+
+	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+		return -EINVAL;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+			ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
+			ctrl &= ~SPDIF_OPMODE_MASK;
+			if (!host->saved_params.mute)
+				ctrl |= SPDIF_OPMODE_AUD_DATA |
+					SPDIF_STATE_NORMAL;
+			else
+				ctrl |= SPDIF_OPMODE_MUTE_PCM;
+			writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
+		ctrl &= ~SPDIF_OPMODE_MASK;
+		ctrl |= SPDIF_OPMODE_OFF;
+		writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
+		break;
+
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int spdif_digital_mute(struct snd_soc_dai *dai, int mute)
+{
+	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
+	u32 val;
+
+	host->saved_params.mute = mute;
+	val = readl(host->io_base + SPDIF_OUT_CTRL);
+	val &= ~SPDIF_OPMODE_MASK;
+
+	if (mute)
+		val |= SPDIF_OPMODE_MUTE_PCM;
+	else {
+		if (host->running)
+			val |= SPDIF_OPMODE_AUD_DATA | SPDIF_STATE_NORMAL;
+		else
+			val |= SPDIF_OPMODE_OFF;
+	}
+
+	writel(val, host->io_base + SPDIF_OUT_CTRL);
+	return 0;
+}
+
+static int spdif_mute_get(struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+	struct snd_soc_card *card = codec->card;
+	struct snd_soc_pcm_runtime *rtd = card->rtd;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
+
+	ucontrol->value.integer.value[0] = host->saved_params.mute;
+	return 0;
+}
+
+static int spdif_mute_put(struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+	struct snd_soc_card *card = codec->card;
+	struct snd_soc_pcm_runtime *rtd = card->rtd;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
+
+	if (host->saved_params.mute == ucontrol->value.integer.value[0])
+		return 0;
+
+	spdif_digital_mute(cpu_dai, ucontrol->value.integer.value[0]);
+
+	return 1;
+}
+static const struct snd_kcontrol_new spdif_out_controls[] = {
+	SOC_SINGLE_BOOL_EXT("IEC958 Playback Switch", 0,
+			spdif_mute_get, spdif_mute_put),
+};
+
+int spdif_soc_dai_probe(struct snd_soc_dai *dai)
+{
+	return snd_soc_add_dai_controls(dai, spdif_out_controls,
+				ARRAY_SIZE(spdif_out_controls));
+}
+
+static const struct snd_soc_dai_ops spdif_out_dai_ops = {
+	.digital_mute	= spdif_digital_mute,
+	.startup	= spdif_out_startup,
+	.shutdown	= spdif_out_shutdown,
+	.trigger	= spdif_out_trigger,
+	.hw_params	= spdif_out_hw_params,
+};
+
+static struct snd_soc_dai_driver spdif_out_dai = {
+	.playback = {
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+				 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \
+				 SNDRV_PCM_RATE_192000),
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	},
+	.probe = spdif_soc_dai_probe,
+	.ops = &spdif_out_dai_ops,
+};
+
+static int spdif_out_probe(struct platform_device *pdev)
+{
+	struct spdif_out_dev *host;
+	struct spear_spdif_platform_data *pdata;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
+
+	if (!devm_request_mem_region(&pdev->dev, res->start,
+				resource_size(res), pdev->name)) {
+		dev_warn(&pdev->dev, "Failed to get memory resourse\n");
+		return -ENOENT;
+	}
+
+	host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
+	if (!host) {
+		dev_warn(&pdev->dev, "kzalloc fail\n");
+		return -ENOMEM;
+	}
+
+	host->io_base = devm_ioremap(&pdev->dev, res->start,
+				resource_size(res));
+	if (!host->io_base) {
+		dev_warn(&pdev->dev, "ioremap failed\n");
+		return -ENOMEM;
+	}
+
+	host->clk = clk_get(&pdev->dev, NULL);
+	if (IS_ERR(host->clk))
+		return PTR_ERR(host->clk);
+
+	pdata = dev_get_platdata(&pdev->dev);
+
+	host->dma_params.data = pdata->dma_params;
+	host->dma_params.addr = res->start + SPDIF_OUT_FIFO_DATA;
+	host->dma_params.max_burst = 16;
+	host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	host->dma_params.filter = pdata->filter;
+
+	dev_set_drvdata(&pdev->dev, host);
+
+	ret = snd_soc_register_dai(&pdev->dev, &spdif_out_dai);
+	if (ret != 0) {
+		clk_put(host->clk);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int spdif_out_remove(struct platform_device *pdev)
+{
+	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);
+
+	snd_soc_unregister_dai(&pdev->dev);
+	dev_set_drvdata(&pdev->dev, NULL);
+
+	clk_put(host->clk);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int spdif_out_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);
+
+	if (host->running)
+		clk_disable(host->clk);
+
+	return 0;
+}
+
+static int spdif_out_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);
+
+	if (host->running) {
+		clk_enable(host->clk);
+		spdif_out_configure(host);
+		spdif_out_clock(host, host->saved_params.core_freq,
+				host->saved_params.rate);
+	}
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(spdif_out_dev_pm_ops, spdif_out_suspend, \
+		spdif_out_resume);
+
+#define SPDIF_OUT_DEV_PM_OPS (&spdif_out_dev_pm_ops)
+
+#else
+#define SPDIF_OUT_DEV_PM_OPS NULL
+
+#endif
+
+static struct platform_driver spdif_out_driver = {
+	.probe		= spdif_out_probe,
+	.remove		= spdif_out_remove,
+	.driver		= {
+		.name	= "spdif-out",
+		.owner	= THIS_MODULE,
+		.pm	= SPDIF_OUT_DEV_PM_OPS,
+	},
+};
+
+module_platform_driver(spdif_out_driver);
+
+MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
+MODULE_DESCRIPTION("SPEAr SPDIF OUT SoC Interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:spdif_out");
diff --git a/sound/soc/spear/spdif_out_regs.h b/sound/soc/spear/spdif_out_regs.h
new file mode 100644
index 0000000..a5e5332
--- /dev/null
+++ b/sound/soc/spear/spdif_out_regs.h
@@ -0,0 +1,79 @@
+/*
+ * SPEAr SPDIF OUT controller header file
+ *
+ * Copyright (ST) 2011 Vipin Kumar (vipin.kumar@st.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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef SPDIF_OUT_REGS_H
+#define SPDIF_OUT_REGS_H
+
+#define SPDIF_OUT_SOFT_RST	0x00
+	#define SPDIF_OUT_RESET		(1 << 0)
+#define SPDIF_OUT_FIFO_DATA	0x04
+#define SPDIF_OUT_INT_STA	0x08
+#define SPDIF_OUT_INT_STA_CLR	0x0C
+	#define SPDIF_INT_UNDERFLOW	(1 << 0)
+	#define SPDIF_INT_EODATA	(1 << 1)
+	#define SPDIF_INT_EOBLOCK	(1 << 2)
+	#define SPDIF_INT_EOLATENCY	(1 << 3)
+	#define SPDIF_INT_EOPD_DATA	(1 << 4)
+	#define SPDIF_INT_MEMFULLREAD	(1 << 5)
+	#define SPDIF_INT_EOPD_PAUSE	(1 << 6)
+
+#define SPDIF_OUT_INT_EN	0x10
+#define SPDIF_OUT_INT_EN_SET	0x14
+#define SPDIF_OUT_INT_EN_CLR	0x18
+#define SPDIF_OUT_CTRL		0x1C
+	#define SPDIF_OPMODE_MASK	(7 << 0)
+	#define SPDIF_OPMODE_OFF	(0 << 0)
+	#define SPDIF_OPMODE_MUTE_PCM	(1 << 0)
+	#define SPDIF_OPMODE_MUTE_PAUSE	(2 << 0)
+	#define SPDIF_OPMODE_AUD_DATA	(3 << 0)
+	#define SPDIF_OPMODE_ENCODE	(4 << 0)
+	#define SPDIF_STATE_NORMAL	(1 << 3)
+	#define SPDIF_DIVIDER_MASK	(0xff << 5)
+	#define SPDIF_DIVIDER_SHIFT	(5)
+	#define SPDIF_SAMPLEREAD_MASK	(0x1ffff << 15)
+	#define SPDIF_SAMPLEREAD_SHIFT	(15)
+#define SPDIF_OUT_STA		0x20
+#define SPDIF_OUT_PA_PB		0x24
+#define SPDIF_OUT_PC_PD		0x28
+#define SPDIF_OUT_CL1		0x2C
+#define SPDIF_OUT_CR1		0x30
+#define SPDIF_OUT_CL2_CR2_UV	0x34
+#define SPDIF_OUT_PAUSE_LAT	0x38
+#define SPDIF_OUT_FRMLEN_BRST	0x3C
+#define SPDIF_OUT_CFG		0x40
+	#define SPDIF_OUT_MEMFMT_16_0	(0 << 5)
+	#define SPDIF_OUT_MEMFMT_16_16	(1 << 5)
+	#define SPDIF_OUT_VALID_DMA	(0 << 3)
+	#define SPDIF_OUT_VALID_HW	(1 << 3)
+	#define SPDIF_OUT_USER_DMA	(0 << 2)
+	#define SPDIF_OUT_USER_HW	(1 << 2)
+	#define SPDIF_OUT_CHNLSTA_DMA	(0 << 1)
+	#define SPDIF_OUT_CHNLSTA_HW	(1 << 1)
+	#define SPDIF_OUT_PARITY_HW	(0 << 0)
+	#define SPDIF_OUT_PARITY_DMA	(1 << 0)
+	#define SPDIF_OUT_FDMA_TRIG_2	(2 << 8)
+	#define SPDIF_OUT_FDMA_TRIG_6	(6 << 8)
+	#define SPDIF_OUT_FDMA_TRIG_8	(8 << 8)
+	#define SPDIF_OUT_FDMA_TRIG_10	(10 << 8)
+	#define SPDIF_OUT_FDMA_TRIG_12	(12 << 8)
+	#define SPDIF_OUT_FDMA_TRIG_16	(16 << 8)
+	#define SPDIF_OUT_FDMA_TRIG_18	(18 << 8)
+
+#endif /* SPDIF_OUT_REGS_H */
-- 
1.7.0.4

Re: [PATCH V5 2/2] ASoC: SPEAr spdif_out: Add spdif out support

[Mark Brown]

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On Wed, Jul 04, 2012 at 04:11:13PM +0530, Rajeev Kumar wrote:
> From: Vipin Kumar <vipin.kumar@st.com>
> 
> This patch implements the spdif out driver for ST peripheral. This
> peripheral implements IEC60958 standard

Applied, thanks.

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Re: [PATCH V5 1/2] ASoC: STA529: Add support for STA529 Audio Codec

[Mark Brown]

[-- Attachment #1.1: Type: text/plain, Size: 344 bytes --]

On Wed, Jul 04, 2012 at 04:11:12PM +0530, Rajeev Kumar wrote:
> The STA529 is a digital stereo class-D audio amplifier. It includes an
> audio DSP, an ST proprietary high-efficiency class-D driver and CMOS
> power output stage. It is intended for high-efficiency
> digital-to-power-audio conversion for portable applications.

Applied, thanks.

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