ASoC: Add WM2000 driver

The WM2000 is a low power, high quality handset receiver speaker
driver with Wolfson myZone™ Ambient Noise Cancellation (ANC). It
provides enhanced voice communication quality in a noisy environment
if the handset acoustics are designed appropriately.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

include/sound/wm2000.h

+/*
+ * linux/sound/wm2000.h -- Platform data for WM2000
+ *
+ * Copyright 2010 Wolfson Microelectronics. PLC.
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_SND_WM2000_H
+#define __LINUX_SND_WM2000_H
+
+struct wm2000_platform_data {
+	/** Filename for system-specific image to download to device. */
+	const char *download_file;
+
+	/** Divide MCLK by 2 for system clock? */
+	unsigned int mclkdiv2:1;
+
+	/** Disable speech clarity enhancement, for use when an
+	 * external algorithm is used. */
+	unsigned int speech_enh_disable:1;
+};
+
+#endif

sound/soc/codecs/Kconfig

@@ -36,6 +36,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_TWL4030 if TWL4030_CORE
 	select SND_SOC_UDA134X
 	select SND_SOC_UDA1380 if I2C
+	select SND_SOC_WM2000 if I2C
 	select SND_SOC_WM8350 if MFD_WM8350
 	select SND_SOC_WM8400 if MFD_WM8400
 	select SND_SOC_WM8510 if SND_SOC_I2C_AND_SPI
@@ -265,3 +266,6 @@ config SND_SOC_MAX9877
 
 config SND_SOC_TPA6130A2
 	tristate
+
+config SND_SOC_WM2000
+	tristate

sound/soc/codecs/Makefile

@@ -58,6 +58,7 @@ snd-soc-wm-hubs-objs := wm_hubs.o
 # Amp
 snd-soc-max9877-objs := max9877.o
 snd-soc-tpa6130a2-objs := tpa6130a2.o
+snd-soc-wm2000-objs := wm2000.o
 
 obj-$(CONFIG_SND_SOC_AC97_CODEC)	+= snd-soc-ac97.o
 obj-$(CONFIG_SND_SOC_AD1836)	+= snd-soc-ad1836.o
@@ -119,3 +120,4 @@ obj-$(CONFIG_SND_SOC_WM_HUBS)	+= snd-soc-wm-hubs.o
 # Amp
 obj-$(CONFIG_SND_SOC_MAX9877)	+= snd-soc-max9877.o
 obj-$(CONFIG_SND_SOC_TPA6130A2)	+= snd-soc-tpa6130a2.o
+obj-$(CONFIG_SND_SOC_WM2000)	+= snd-soc-wm2000.o

sound/soc/codecs/wm2000.h

+/*
+ * wm2000.h  --  WM2000 Soc Audio driver
+ *
+ * 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.
+ */
+
+#ifndef _WM2000_H
+#define _WM2000_H
+
+struct wm2000_setup_data {
+	unsigned short i2c_address;
+	int mclk_div;   /* Set to a non-zero value if MCLK_DIV_2 required */
+};
+
+extern int wm2000_add_controls(struct snd_soc_codec *codec);
+
+extern struct snd_soc_dai wm2000_dai;
+extern struct snd_soc_codec_device soc_codec_dev_wm2000;
+
+#define WM2000_REG_SYS_START	    0x8000
+#define WM2000_REG_SPEECH_CLARITY   0x8fef
+#define WM2000_REG_SYS_WATCHDOG     0x8ff6
+#define WM2000_REG_ANA_VMID_PD_TIME 0x8ff7
+#define WM2000_REG_ANA_VMID_PU_TIME 0x8ff8
+#define WM2000_REG_CAT_FLTR_INDX    0x8ff9
+#define WM2000_REG_CAT_GAIN_0       0x8ffa
+#define WM2000_REG_SYS_STATUS       0x8ffc
+#define WM2000_REG_SYS_MODE_CNTRL   0x8ffd
+#define WM2000_REG_SYS_START0       0x8ffe
+#define WM2000_REG_SYS_START1       0x8fff
+#define WM2000_REG_ID1              0xf000
+#define WM2000_REG_ID2              0xf001
+#define WM2000_REG_REVISON          0xf002
+#define WM2000_REG_SYS_CTL1         0xf003
+#define WM2000_REG_SYS_CTL2         0xf004
+#define WM2000_REG_ANC_STAT         0xf005
+#define WM2000_REG_IF_CTL           0xf006
+
+/* SPEECH_CLARITY */
+#define WM2000_SPEECH_CLARITY   0x01
+
+/* SYS_STATUS */
+#define WM2000_STATUS_MOUSE_ACTIVE              0x40
+#define WM2000_STATUS_CAT_FREQ_COMPLETE         0x20
+#define WM2000_STATUS_CAT_GAIN_COMPLETE         0x10
+#define WM2000_STATUS_THERMAL_SHUTDOWN_COMPLETE 0x08
+#define WM2000_STATUS_ANC_DISABLED              0x04
+#define WM2000_STATUS_POWER_DOWN_COMPLETE       0x02
+#define WM2000_STATUS_BOOT_COMPLETE             0x01
+
+/* SYS_MODE_CNTRL */
+#define WM2000_MODE_ANA_SEQ_INCLUDE 0x80
+#define WM2000_MODE_MOUSE_ENABLE    0x40
+#define WM2000_MODE_CAT_FREQ_ENABLE 0x20
+#define WM2000_MODE_CAT_GAIN_ENABLE 0x10
+#define WM2000_MODE_BYPASS_ENTRY    0x08
+#define WM2000_MODE_STANDBY_ENTRY   0x04
+#define WM2000_MODE_THERMAL_ENABLE  0x02
+#define WM2000_MODE_POWER_DOWN      0x01
+
+/* SYS_CTL1 */
+#define WM2000_SYS_STBY          0x01
+
+/* SYS_CTL2 */
+#define WM2000_MCLK_DIV2_ENA_CLR 0x80
+#define WM2000_MCLK_DIV2_ENA_SET 0x40
+#define WM2000_ANC_ENG_CLR       0x20
+#define WM2000_ANC_ENG_SET       0x10
+#define WM2000_ANC_INT_N_CLR     0x08
+#define WM2000_ANC_INT_N_SET     0x04
+#define WM2000_RAM_CLR           0x02
+#define WM2000_RAM_SET           0x01
+
+/* ANC_STAT */
+#define WM2000_ANC_ENG_IDLE      0x01
+
+#endif