ASoC: tas2552: Support TI TAS2552 Amplifier

Support the TI TAS2552 Class D amplifier.

The TAS2552 is a high efficiency Class-D audio
power amplifier with advanced battery current
management and an integrated Class-G boost
The device constantly measures the
current and voltage across the load and provides a
digital stream of this information.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

Documentation/devicetree/bindings/sound/tas2552.txt

+Texas Instruments - tas2552 Codec module
+
+The tas2552 serial control bus communicates through I2C protocols
+
+Required properties:
+	- compatible - One of:
+		"ti,tas2552" - TAS2552
+	- reg -  I2C slave address
+	- supply-*: Required supply regulators are:
+		"vbat"		battery voltage
+		"iovdd"		I/O Voltage
+		"avdd"		Analog DAC Voltage
+
+Optional properties:
+	- enable-gpio - gpio pin to enable/disable the device
+
+Example:
+
+tas2552: tas2552@41 {
+	compatible = "ti,tas2552";
+	reg = <0x41>;
+	enable-gpio = <&gpio4 2 GPIO_ACTIVE_HIGH>;
+};
+
+For more product information please see the link below:
+http://www.ti.com/product/TAS2552

include/sound/tas2552-plat.h

+/*
+ * TAS2552 driver platform header
+ *
+ * Copyright (C) 2014 Texas Instruments Inc.
+ *
+ * Author: Dan Murphy <dmurphy@ti.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.
+ *
+ * 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.
+ */
+
+#ifndef TAS2552_PLAT_H
+#define TAS2552_PLAT_H
+
+struct tas2552_platform_data {
+	int enable_gpio;
+};
+
+#endif

sound/soc/codecs/Kconfig

@@ -91,6 +91,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_STA350 if I2C
 	select SND_SOC_STA529 if I2C
 	select SND_SOC_STAC9766 if SND_SOC_AC97_BUS
+	select SND_SOC_TAS2552 if I2C
 	select SND_SOC_TAS5086 if I2C
 	select SND_SOC_TLV320AIC23_I2C if I2C
 	select SND_SOC_TLV320AIC23_SPI if SPI_MASTER
@@ -513,6 +514,10 @@ config SND_SOC_STA529
 config SND_SOC_STAC9766
 	tristate
 
+config SND_SOC_TAS2552
+	tristate "Texas Instruments TAS2552 Mono Audio amplifier"
+	depends on I2C
+
 config SND_SOC_TAS5086
 	tristate "Texas Instruments TAS5086 speaker amplifier"
 	depends on I2C

sound/soc/codecs/Makefile

@@ -160,6 +160,7 @@ snd-soc-wm-hubs-objs := wm_hubs.o
 # Amp
 snd-soc-max9877-objs := max9877.o
 snd-soc-tpa6130a2-objs := tpa6130a2.o
+snd-soc-tas2552-objs := tas2552.o
 
 obj-$(CONFIG_SND_SOC_88PM860X)	+= snd-soc-88pm860x.o
 obj-$(CONFIG_SND_SOC_AB8500_CODEC)	+= snd-soc-ab8500-codec.o
@@ -251,6 +252,7 @@ obj-$(CONFIG_SND_SOC_STA32X)   += snd-soc-sta32x.o
 obj-$(CONFIG_SND_SOC_STA350)   += snd-soc-sta350.o
 obj-$(CONFIG_SND_SOC_STA529)   += snd-soc-sta529.o
 obj-$(CONFIG_SND_SOC_STAC9766)	+= snd-soc-stac9766.o
+obj-$(CONFIG_SND_SOC_TAS2552)	+= snd-soc-tas2552.o
 obj-$(CONFIG_SND_SOC_TAS5086)	+= snd-soc-tas5086.o
 obj-$(CONFIG_SND_SOC_TLV320AIC23)	+= snd-soc-tlv320aic23.o
 obj-$(CONFIG_SND_SOC_TLV320AIC23_I2C)	+= snd-soc-tlv320aic23-i2c.o

sound/soc/codecs/tas2552.h

+/*
+ * tas2552.h - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated -  http://www.ti.com
+ *
+ * Author: Dan Murphy <dmurphy@ti.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.
+ *
+ * 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.
+ */
+
+#ifndef __TAS2552_H__
+#define __TAS2552_H__
+
+/* Register Address Map */
+#define TAS2552_DEVICE_STATUS	0x00
+#define TAS2552_CFG_1			0x01
+#define TAS2552_CFG_2			0x02
+#define TAS2552_CFG_3			0x03
+#define TAS2552_DOUT			0x04
+#define TAS2552_SER_CTRL_1		0x05
+#define TAS2552_SER_CTRL_2		0x06
+#define TAS2552_OUTPUT_DATA		0x07
+#define TAS2552_PLL_CTRL_1		0x08
+#define TAS2552_PLL_CTRL_2		0x09
+#define TAS2552_PLL_CTRL_3		0x0a
+#define TAS2552_BTIP			0x0b
+#define TAS2552_BTS_CTRL		0x0c
+#define TAS2552_RESERVED_0D		0x0d
+#define TAS2552_LIMIT_RATE_HYS	0x0e
+#define TAS2552_LIMIT_RELEASE	0x0f
+#define TAS2552_LIMIT_INT_COUNT	0x10
+#define TAS2552_PDM_CFG			0x11
+#define TAS2552_PGA_GAIN		0x12
+#define TAS2552_EDGE_RATE_CTRL	0x13
+#define TAS2552_BOOST_PT_CTRL	0x14
+#define TAS2552_VER_NUM			0x16
+#define TAS2552_VBAT_DATA		0x19
+#define TAS2552_MAX_REG			0x20
+
+/* CFG1 Register Masks */
+#define TAS2552_MUTE_MASK		(1 << 2)
+#define TAS2552_SWS_MASK		(1 << 1)
+#define TAS2552_WCLK_MASK		0x07
+#define TAS2552_CLASSD_EN_MASK	(1 << 7)
+
+/* CFG2 Register Masks */
+#define TAS2552_CLASSD_EN		(1 << 7)
+#define TAS2552_BOOST_EN		(1 << 6)
+#define TAS2552_APT_EN			(1 << 5)
+#define TAS2552_PLL_ENABLE		(1 << 3)
+#define TAS2552_LIM_EN			(1 << 2)
+#define TAS2552_IVSENSE_EN		(1 << 1)
+
+/* CFG3 Register Masks */
+#define TAS2552_WORD_CLK_MASK		(1 << 7)
+#define TAS2552_BIT_CLK_MASK		(1 << 6)
+#define TAS2552_DATA_FORMAT_MASK	(0x11 << 2)
+
+#define TAS2552_DAIFMT_I2S_MASK		0xf3
+#define TAS2552_DAIFMT_DSP			(1 << 3)
+#define TAS2552_DAIFMT_RIGHT_J		(1 << 4)
+#define TAS2552_DAIFMT_LEFT_J		(0x11 << 3)
+
+#define TAS2552_PLL_SRC_MCLK	0x00
+#define TAS2552_PLL_SRC_BCLK	(1 << 3)
+#define TAS2552_PLL_SRC_IVCLKIN	(1 << 4)
+#define TAS2552_PLL_SRC_1_8_FIXED (0x11 << 3)
+
+#define TAS2552_DIN_SRC_SEL_MUTED	0x00
+#define TAS2552_DIN_SRC_SEL_LEFT	(1 << 4)
+#define TAS2552_DIN_SRC_SEL_RIGHT	(1 << 5)
+#define TAS2552_DIN_SRC_SEL_AVG_L_R	(0x11 << 4)
+
+#define TAS2552_PDM_IN_SEL		(1 << 5)
+#define TAS2552_I2S_OUT_SEL		(1 << 6)
+#define TAS2552_ANALOG_IN_SEL	(1 << 7)
+
+/* CFG3 WCLK Dividers */
+#define TAS2552_8KHZ		0x00
+#define TAS2552_11_12KHZ	(1 << 1)
+#define TAS2552_16KHZ		(1 << 2)
+#define TAS2552_22_24KHZ	(1 << 3)
+#define TAS2552_32KHZ		(1 << 4)
+#define TAS2552_44_48KHZ	(1 << 5)
+#define TAS2552_88_96KHZ	(1 << 6)
+#define TAS2552_176_192KHZ	(1 << 7)
+
+/* OUTPUT_DATA register */
+#define TAS2552_PDM_DATA_I		0x00
+#define TAS2552_PDM_DATA_V		(1 << 6)
+#define TAS2552_PDM_DATA_I_V	(1 << 7)
+#define TAS2552_PDM_DATA_V_I	(0x11 << 6)
+
+/* PDM CFG Register */
+#define TAS2552_PDM_DATA_ES_RISE 0x4
+
+#define TAS2552_PDM_PLL_CLK_SEL 0x00
+#define TAS2552_PDM_IV_CLK_SEL	(1 << 1)
+#define TAS2552_PDM_BCLK_SEL	(1 << 2)
+#define TAS2552_PDM_MCLK_SEL	(1 << 3)
+
+/* Boost pass-through register */
+#define TAS2552_APT_DELAY_50	0x00
+#define TAS2552_APT_DELAY_75	(1 << 1)
+#define TAS2552_APT_DELAY_125	(1 << 2)
+#define TAS2552_APT_DELAY_200	(1 << 3)
+
+#define TAS2552_APT_THRESH_2_5		0x00
+#define TAS2552_APT_THRESH_1_7		(1 << 3)
+#define TAS2552_APT_THRESH_1_4_1_1	(1 << 4)
+#define TAS2552_APT_THRESH_2_1_7	(0x11 << 2)
+
+/* PLL Control Register */
+#define TAS2552_245MHZ_CLK			24576000
+#define TAS2552_225MHZ_CLK			22579200
+#define TAS2552_PLL_J_MASK			0x7f
+#define TAS2552_PLL_D_UPPER_MASK	0x3f
+#define TAS2552_PLL_D_LOWER_MASK	0xff
+#define TAS2552_PLL_BYPASS_MASK		0x80
+#define TAS2552_PLL_BYPASS			0x80
+
+#endif