[alsa-devel] [PATCH 2/2] sound: asoc: Adding support for STA529 Audio Codec

Rajeev Kumar rajeev-dlh.kumar at st.com
Thu Mar 17 12:23:36 CET 2011


This patch adds the support for STA529 audio codec.
Details of the audio codec can be seen here:
http://www.st.com/internet/imag_video/product/159187.jsp

Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar at st.com>
---
 sound/soc/codecs/Kconfig  |    5 +
 sound/soc/codecs/Makefile |    2 +
 sound/soc/codecs/sta529.c |  366 +++++++++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/sta529.h |   61 ++++++++
 4 files changed, 434 insertions(+), 0 deletions(-)
 create mode 100644 sound/soc/codecs/sta529.c
 create mode 100644 sound/soc/codecs/sta529.h

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index d63c175..ceb85ff 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -40,6 +40,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_SN95031 if INTEL_SCU_IPC
 	select SND_SOC_SPDIF
 	select SND_SOC_SSM2602 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
@@ -206,6 +207,10 @@ config SND_SOC_SPDIF
 config SND_SOC_SSM2602
 	tristate
 
+config SND_SOC_STA529
+	tristate
+	depends on I2C
+
 config SND_SOC_STAC9766
 	tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 379bc55..971275b 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -26,6 +26,7 @@ snd-soc-alc5623-objs := alc5623.o
 snd-soc-sn95031-objs := sn95031.o
 snd-soc-spdif-objs := spdif_transciever.o
 snd-soc-ssm2602-objs := ssm2602.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
@@ -114,6 +115,7 @@ obj-$(CONFIG_SND_SOC_SGTL5000)  += snd-soc-sgtl5000.o
 obj-$(CONFIG_SND_SOC_SN95031)	+=snd-soc-sn95031.o
 obj-$(CONFIG_SND_SOC_SPDIF)	+= snd-soc-spdif.o
 obj-$(CONFIG_SND_SOC_SSM2602)	+= snd-soc-ssm2602.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..e1f88e3
--- /dev/null
+++ b/sound/soc/codecs/sta529.c
@@ -0,0 +1,366 @@
+/*
+ * ASoC codec driver for spear platform
+ *
+ * sound/soc/codecs/sta529.c -- spear ALSA Soc codec driver
+ *
+ * Copyright (C) 2010 ST Microelectronics
+ * Rajeev Kumar<rajeev-dlh.kumar at 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/init.h>
+#include <linux/i2c.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/pm.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 <mach/misc_regs.h>
+#include "sta529.h"
+
+#define STA529_VERSION "0.1"
+static const u8 sta529_reg[STA529_CACHEREGNUM] = {
+	0x35, 0xc8, 0x50, 0x00,
+	0x00, 0x00, 0x02, 0x00,
+	0x02, 0x05, 0x32, 0x41,
+	0x92, 0x41, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x80, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x52, 0x40,
+	0x21, 0xef, 0x04, 0x06,
+	0x41, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00,
+};
+
+struct sta529 {
+	unsigned int sysclk;
+	enum snd_soc_control_type control_type;
+	void *control_data;
+};
+static const struct snd_kcontrol_new sta529_snd_controls[] = {
+	SOC_SINGLE("Master Playback Volume", STA529_MVOL, 0, 127, 1),
+	SOC_SINGLE("Left Playback Volume", STA529_LVOL, 0, 127, 1),
+	SOC_SINGLE("Right Playback Volume", STA529_RVOL, 0, 127, 1),
+};
+
+/* reading from register cache: sta529 register value */
+static inline unsigned int
+sta529_read_reg_cache(struct snd_soc_codec *codec, u32 reg)
+{
+	u8 *cache = codec->reg_cache;
+
+	if (reg >= STA529_CACHEREGNUM)
+		return -EINVAL;
+
+	return cache[reg];
+}
+
+/* write register cache : sta529 register value. */
+static inline void
+sta529_write_reg_cache(struct snd_soc_codec *codec, u8 reg, int value)
+{
+	u8 *cache = codec->reg_cache;
+
+	if (reg >= STA529_CACHEREGNUM)
+		return;
+
+	cache[reg] = value;
+}
+
+/* write to the sta529 register space */
+static int
+sta529_write(struct snd_soc_codec *codec, u32 reg, u32 value)
+{
+	u8 data[2];
+
+	data[0] = reg & 0xff;
+	data[1] = value & 0xff;
+	sta529_write_reg_cache(codec, data[0], data[1]);
+	if (codec->hw_write(codec->control_data, data, NUM_OF_MSG)
+			== NUM_OF_MSG)
+		return 0;
+	else
+		return -EIO;
+}
+
+static int
+spear_sta529_set_dai_fmt(struct snd_soc_dai *codec_dai, u32 fmt)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	u8 mode = 0;
+	int val;
+
+	/* 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;
+	}
+
+	val = sta529_read_reg_cache(codec, STA529_S2PCFG0);
+	val |= mode;
+	/*this setting will be used with actual h/w */
+	sta529_write(codec, STA529_S2PCFG0, val);
+
+	return 0;
+}
+
+static int
+spear_sta_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id,
+		unsigned int freq, int dir)
+{
+	int ret = -EINVAL;
+	struct clk *clk;
+
+	clk = clk_get_sys(NULL, "i2s_ref_clk");
+	if (IS_ERR(clk)) {
+		ret = PTR_ERR(clk);
+		goto err_clk;
+	}
+	if (clk_set_rate(clk, freq))
+		goto err_put_clk;
+
+	ret = clk_enable(clk);
+	if (ret < 0)
+		goto err_put_clk;
+
+	return 0;
+
+err_put_clk:
+	clk_put(clk);
+err_clk:
+	return ret;
+}
+
+static int spear_sta529_mute(struct snd_soc_dai *dai, int mute)
+{
+	struct snd_soc_codec *codec = dai->codec;
+
+	u8 mute_reg = sta529_read_reg_cache(codec, STA529_FFXCFG0) &
+		~CODEC_MUTE_VAL;
+
+	if (mute)
+		mute_reg |= CODEC_MUTE_VAL;
+
+	sta529_write(codec, STA529_FFXCFG0, mute_reg);
+
+	return 0;
+}
+
+static int
+sta529_set_bias_level(struct snd_soc_codec *codec,
+		enum snd_soc_bias_level level)
+{
+	u16 sts;
+
+	sts = sta529_read_reg_cache(codec, STA529_FFXCFG0);
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+	case SND_SOC_BIAS_PREPARE:
+		sta529_write(codec, STA529_FFXCFG0, sts & POWER_STBY);
+		break;
+	case SND_SOC_BIAS_STANDBY:
+	case SND_SOC_BIAS_OFF:
+		sta529_write(codec, STA529_FFXCFG0, sts | ~POWER_STBY);
+
+		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 struct snd_soc_dai_ops sta529_dai_ops = {
+	.set_fmt	= spear_sta529_set_dai_fmt,
+	.digital_mute	= spear_sta529_mute,
+	.set_sysclk	= spear_sta_set_dai_sysclk,
+};
+
+static struct snd_soc_dai_driver sta529_dai = {
+	.name = "sta529-audio",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SPEAR_PCM_RATES,
+		.formats = SPEAR_PCM_FORMAT,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SPEAR_PCM_RATES,
+		.formats = SPEAR_PCM_FORMAT,
+	},
+	.ops	= &sta529_dai_ops,
+};
+
+static int spear_sta529_probe(struct snd_soc_codec *codec)
+{
+	struct sta529 *sta529 = snd_soc_codec_get_drvdata(codec);
+	int i ;
+	u8 *cache ;
+	u8 data[2];
+
+	dev_info(codec->dev, "spear Audio Codec %s", STA529_VERSION);
+
+	codec->control_data = sta529->control_data;
+	codec->hw_write = (hw_write_t)i2c_master_send;
+	codec->hw_read = NULL;
+	sta529_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+	snd_soc_add_controls(codec, sta529_snd_controls,
+			ARRAY_SIZE(sta529_snd_controls));
+
+	cache = codec->reg_cache;
+	for (i = 0; i < ARRAY_SIZE(sta529_reg); i++) {
+		data[0] = i;
+		data[1] = cache[i];
+		codec->hw_write(codec->control_data, data, NUM_OF_MSG);
+	}
+	return 0;
+}
+
+/* power down chip */
+static int spear_sta529_remove(struct snd_soc_codec *codec)
+{
+	sta529_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+	return 0;
+}
+
+static int spear_sta529_suspend(struct snd_soc_codec *codec, pm_message_t state)
+{
+	sta529_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+	return 0;
+}
+
+static int spear_sta529_resume(struct snd_soc_codec *codec)
+{
+	int i;
+	u8 data[2];
+	u8 *cache = codec->reg_cache;
+
+	for (i = 0; i < ARRAY_SIZE(sta529_reg); i++) {
+		data[0] = i;
+		data[1] = cache[i];
+		codec->hw_write(codec->control_data, data, NUM_OF_MSG);
+	}
+
+	sta529_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+	sta529_set_bias_level(codec, codec->dapm.suspend_bias_level);
+
+	return 0;
+}
+
+struct snd_soc_codec_driver soc_codec_dev_sta529 = {
+	.reg_cache_size = ARRAY_SIZE(sta529_reg),
+	.reg_word_size = sizeof(u8),
+	.reg_cache_default = sta529_reg,
+	.probe = spear_sta529_probe,
+	.remove = spear_sta529_remove,
+	.suspend = spear_sta529_suspend,
+	.resume = spear_sta529_resume,
+	.read = sta529_read_reg_cache,
+	.write = sta529_write,
+	.set_bias_level = sta529_set_bias_level,
+};
+
+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 = kzalloc(sizeof(struct sta529), GFP_KERNEL);
+	if (sta529 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, sta529);
+	sta529->control_data = i2c;
+	sta529->control_type = SND_SOC_I2C;
+
+	ret = snd_soc_register_codec(&i2c->dev,
+			&soc_codec_dev_sta529, &sta529_dai, 1);
+	if (ret < 0)
+		kfree(sta529);
+	return ret;
+}
+
+static int sta529_i2c_remove(struct i2c_client *client)
+{
+	snd_soc_unregister_codec(&client->dev);
+	kfree(i2c_get_clientdata(client));
+	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-codec",
+		.owner = THIS_MODULE,
+	},
+	.probe		= sta529_i2c_probe,
+	.remove		= __devexit_p(sta529_i2c_remove),
+	.id_table	= sta529_i2c_id,
+};
+
+static int __init sta529_modinit(void)
+{
+	int ret = 0;
+
+	ret = i2c_add_driver(&sta529_i2c_driver);
+	if (ret != 0)
+		printk(KERN_ERR "Failed to reg sta529 I2C driver: %d\n", ret);
+
+	return ret;
+
+}
+module_init(sta529_modinit);
+
+static void __exit sta529_exit(void)
+{
+	i2c_del_driver(&sta529_i2c_driver);
+}
+module_exit(sta529_exit);
+
+MODULE_DESCRIPTION("Soc STA529 driver");
+MODULE_AUTHOR("Rajeev Kumar");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/sta529.h b/sound/soc/codecs/sta529.h
new file mode 100644
index 0000000..58b1478
--- /dev/null
+++ b/sound/soc/codecs/sta529.h
@@ -0,0 +1,61 @@
+/*
+ * ASoC machine driver for spear platform
+ *
+ * sound/soc/codecs/sta529.h -- spear ALSA Soc Audio driver Header file
+ *
+ * Copyright (C) 2010 ST Microelectronics
+ * Rajeev Kumar<rajeev-dlh.kumar at 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.
+ */
+
+#ifndef STA529_H
+#define STA529_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_CACHEREGNUM	0x33 /*total num of reg. in sta529*/
+
+#define SPEAR_PCM_RATES		SNDRV_PCM_RATE_48000
+#define SPEAR_PCM_FORMAT	SNDRV_PCM_FMTBIT_S16_LE
+#define	S2PC_VALUE		0x98
+#define CLOCK_OUT		0x60
+#define LEFT_J_DATA_FORMAT	0x00
+#define I2S_DATA_FORMAT		0x02
+#define RIGHT_J_DATA_FORMAT	0x04
+#define RIGHT_J_DATA_FORMAT	0x04
+#define CODEC_MUTE_VAL		0x80
+#define NUM_OF_MSG		2
+#define POWER_STBY		0xBF
+
+#endif /* end of codec header file */
-- 
1.6.0.2



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