Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 949 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm2000.c b/sound/soc/codecs/wm2000.c
new file mode 100644
index 000000000..cad39f63b
--- /dev/null
+++ b/sound/soc/codecs/wm2000.c
@@ -0,0 +1,949 @@
+/*
+ * wm2000.c  --  WM2000 ALSA Soc Audio driver
+ *
+ * Copyright 2008-2011 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.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.
+ *
+ * The download image for the WM2000 will be requested as
+ * 'wm2000_anc.bin' by default (overridable via platform data) at
+ * runtime and is expected to be in flat binary format.  This is
+ * generated by Wolfson configuration tools and includes
+ * system-specific calibration information.  If supplied as a
+ * sequence of ASCII-encoded hexidecimal bytes this can be converted
+ * into a flat binary with a command such as this on the command line:
+ *
+ * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }'
+ *                 < file  > wm2000_anc.bin
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/firmware.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/debugfs.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#include <sound/wm2000.h>
+
+#include "wm2000.h"
+
+#define WM2000_NUM_SUPPLIES 3
+
+static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {
+	"SPKVDD",
+	"DBVDD",
+	"DCVDD",
+};
+
+enum wm2000_anc_mode {
+	ANC_ACTIVE = 0,
+	ANC_BYPASS = 1,
+	ANC_STANDBY = 2,
+	ANC_OFF = 3,
+};
+
+struct wm2000_priv {
+	struct i2c_client *i2c;
+	struct regmap *regmap;
+	struct clk *mclk;
+
+	struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES];
+
+	enum wm2000_anc_mode anc_mode;
+
+	unsigned int anc_active:1;
+	unsigned int anc_eng_ena:1;
+	unsigned int spk_ena:1;
+
+	unsigned int speech_clarity:1;
+
+	int anc_download_size;
+	char *anc_download;
+
+	struct mutex lock;
+};
+
+static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
+			unsigned int value)
+{
+	struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
+	return regmap_write(wm2000->regmap, reg, value);
+}
+
+static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
+{
+	struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(wm2000->regmap, r, &val);
+	if (ret < 0)
+		return -1;
+
+	return val;
+}
+
+static void wm2000_reset(struct wm2000_priv *wm2000)
+{
+	struct i2c_client *i2c = wm2000->i2c;
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
+	wm2000_write(i2c, WM2000_REG_ID1, 0);
+
+	wm2000->anc_mode = ANC_OFF;
+}
+
+static int wm2000_poll_bit(struct i2c_client *i2c,
+			   unsigned int reg, u8 mask)
+{
+	int timeout = 4000;
+	int val;
+
+	val = wm2000_read(i2c, reg);
+
+	while (!(val & mask) && --timeout) {
+		msleep(1);
+		val = wm2000_read(i2c, reg);
+	}
+
+	if (timeout == 0)
+		return 0;
+	else
+		return 1;
+}
+
+static int wm2000_power_up(struct i2c_client *i2c, int analogue)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+	unsigned long rate;
+	int ret;
+
+	if (WARN_ON(wm2000->anc_mode != ANC_OFF))
+		return -EINVAL;
+
+	dev_dbg(&i2c->dev, "Beginning power up\n");
+
+	ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
+	rate = clk_get_rate(wm2000->mclk);
+	if (rate <= 13500000) {
+		dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
+		wm2000_write(i2c, WM2000_REG_SYS_CTL2,
+			     WM2000_MCLK_DIV2_ENA_CLR);
+	} else {
+		dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
+		wm2000_write(i2c, WM2000_REG_SYS_CTL2,
+			     WM2000_MCLK_DIV2_ENA_SET);
+	}
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
+
+	/* Wait for ANC engine to become ready */
+	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
+			     WM2000_ANC_ENG_IDLE)) {
+		dev_err(&i2c->dev, "ANC engine failed to reset\n");
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+		return -ETIMEDOUT;
+	}
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+			     WM2000_STATUS_BOOT_COMPLETE)) {
+		dev_err(&i2c->dev, "ANC engine failed to initialise\n");
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+		return -ETIMEDOUT;
+	}
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
+
+	/* Open code download of the data since it is the only bulk
+	 * write we do. */
+	dev_dbg(&i2c->dev, "Downloading %d bytes\n",
+		wm2000->anc_download_size - 2);
+
+	ret = i2c_master_send(i2c, wm2000->anc_download,
+			      wm2000->anc_download_size);
+	if (ret < 0) {
+		dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+		return ret;
+	}
+	if (ret != wm2000->anc_download_size) {
+		dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
+			ret, wm2000->anc_download_size);
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+		return -EIO;
+	}
+
+	dev_dbg(&i2c->dev, "Download complete\n");
+
+	if (analogue) {
+		wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
+
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_ANA_SEQ_INCLUDE |
+			     WM2000_MODE_MOUSE_ENABLE |
+			     WM2000_MODE_THERMAL_ENABLE);
+	} else {
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_MOUSE_ENABLE |
+			     WM2000_MODE_THERMAL_ENABLE);
+	}
+
+	ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
+	if (wm2000->speech_clarity)
+		ret |= WM2000_SPEECH_CLARITY;
+	else
+		ret &= ~WM2000_SPEECH_CLARITY;
+	wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
+
+	wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
+	wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+			     WM2000_STATUS_MOUSE_ACTIVE)) {
+		dev_err(&i2c->dev, "Timed out waiting for device\n");
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+		return -ETIMEDOUT;
+	}
+
+	dev_dbg(&i2c->dev, "ANC active\n");
+	if (analogue)
+		dev_dbg(&i2c->dev, "Analogue active\n");
+	wm2000->anc_mode = ANC_ACTIVE;
+
+	return 0;
+}
+
+static int wm2000_power_down(struct i2c_client *i2c, int analogue)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+	if (analogue) {
+		wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_ANA_SEQ_INCLUDE |
+			     WM2000_MODE_POWER_DOWN);
+	} else {
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_POWER_DOWN);
+	}
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+			     WM2000_STATUS_POWER_DOWN_COMPLETE)) {
+		dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
+		return -ETIMEDOUT;
+	}
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
+			     WM2000_ANC_ENG_IDLE)) {
+		dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
+		return -ETIMEDOUT;
+	}
+
+	regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+
+	dev_dbg(&i2c->dev, "powered off\n");
+	wm2000->anc_mode = ANC_OFF;
+
+	return 0;
+}
+
+static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+	if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE))
+		return -EINVAL;
+
+	if (analogue) {
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_ANA_SEQ_INCLUDE |
+			     WM2000_MODE_THERMAL_ENABLE |
+			     WM2000_MODE_BYPASS_ENTRY);
+	} else {
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_THERMAL_ENABLE |
+			     WM2000_MODE_BYPASS_ENTRY);
+	}
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+			     WM2000_STATUS_ANC_DISABLED)) {
+		dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
+		return -ETIMEDOUT;
+	}
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
+			     WM2000_ANC_ENG_IDLE)) {
+		dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
+		return -ETIMEDOUT;
+	}
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
+
+	wm2000->anc_mode = ANC_BYPASS;
+	dev_dbg(&i2c->dev, "bypass enabled\n");
+
+	return 0;
+}
+
+static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+	if (WARN_ON(wm2000->anc_mode != ANC_BYPASS))
+		return -EINVAL;
+	
+	wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
+
+	if (analogue) {
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_ANA_SEQ_INCLUDE |
+			     WM2000_MODE_MOUSE_ENABLE |
+			     WM2000_MODE_THERMAL_ENABLE);
+	} else {
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_MOUSE_ENABLE |
+			     WM2000_MODE_THERMAL_ENABLE);
+	}
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+			     WM2000_STATUS_MOUSE_ACTIVE)) {
+		dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
+		return -ETIMEDOUT;
+	}
+
+	wm2000->anc_mode = ANC_ACTIVE;
+	dev_dbg(&i2c->dev, "MOUSE active\n");
+
+	return 0;
+}
+
+static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+	if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE))
+		return -EINVAL;
+
+	if (analogue) {
+		wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
+
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_ANA_SEQ_INCLUDE |
+			     WM2000_MODE_THERMAL_ENABLE |
+			     WM2000_MODE_STANDBY_ENTRY);
+	} else {
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_THERMAL_ENABLE |
+			     WM2000_MODE_STANDBY_ENTRY);
+	}
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+			     WM2000_STATUS_ANC_DISABLED)) {
+		dev_err(&i2c->dev,
+			"Timed out waiting for ANC disable after 1ms\n");
+		return -ETIMEDOUT;
+	}
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE)) {
+		dev_err(&i2c->dev,
+			"Timed out waiting for standby\n");
+		return -ETIMEDOUT;
+	}
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
+
+	wm2000->anc_mode = ANC_STANDBY;
+	dev_dbg(&i2c->dev, "standby\n");
+	if (analogue)
+		dev_dbg(&i2c->dev, "Analogue disabled\n");
+
+	return 0;
+}
+
+static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
+
+	if (WARN_ON(wm2000->anc_mode != ANC_STANDBY))
+		return -EINVAL;
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
+
+	if (analogue) {
+		wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
+
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_ANA_SEQ_INCLUDE |
+			     WM2000_MODE_THERMAL_ENABLE |
+			     WM2000_MODE_MOUSE_ENABLE);
+	} else {
+		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
+			     WM2000_MODE_THERMAL_ENABLE |
+			     WM2000_MODE_MOUSE_ENABLE);
+	}
+
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
+	wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
+
+	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
+			     WM2000_STATUS_MOUSE_ACTIVE)) {
+		dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
+		return -ETIMEDOUT;
+	}
+
+	wm2000->anc_mode = ANC_ACTIVE;
+	dev_dbg(&i2c->dev, "MOUSE active\n");
+	if (analogue)
+		dev_dbg(&i2c->dev, "Analogue enabled\n");
+
+	return 0;
+}
+
+typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
+
+static struct {
+	enum wm2000_anc_mode source;
+	enum wm2000_anc_mode dest;
+	int analogue;
+	wm2000_mode_fn step[2];
+} anc_transitions[] = {
+	{
+		.source = ANC_OFF,
+		.dest = ANC_ACTIVE,
+		.analogue = 1,
+		.step = {
+			wm2000_power_up,
+		},
+	},
+	{
+		.source = ANC_OFF,
+		.dest = ANC_STANDBY,
+		.step = {
+			wm2000_power_up,
+			wm2000_enter_standby,
+		},
+	},
+	{
+		.source = ANC_OFF,
+		.dest = ANC_BYPASS,
+		.analogue = 1,
+		.step = {
+			wm2000_power_up,
+			wm2000_enter_bypass,
+		},
+	},
+	{
+		.source = ANC_ACTIVE,
+		.dest = ANC_BYPASS,
+		.analogue = 1,
+		.step = {
+			wm2000_enter_bypass,
+		},
+	},
+	{
+		.source = ANC_ACTIVE,
+		.dest = ANC_STANDBY,
+		.analogue = 1,
+		.step = {
+			wm2000_enter_standby,
+		},
+	},
+	{
+		.source = ANC_ACTIVE,
+		.dest = ANC_OFF,
+		.analogue = 1,
+		.step = {
+			wm2000_power_down,
+		},
+	},
+	{
+		.source = ANC_BYPASS,
+		.dest = ANC_ACTIVE,
+		.analogue = 1,
+		.step = {
+			wm2000_exit_bypass,
+		},
+	},
+	{
+		.source = ANC_BYPASS,
+		.dest = ANC_STANDBY,
+		.analogue = 1,
+		.step = {
+			wm2000_exit_bypass,
+			wm2000_enter_standby,
+		},
+	},
+	{
+		.source = ANC_BYPASS,
+		.dest = ANC_OFF,
+		.step = {
+			wm2000_exit_bypass,
+			wm2000_power_down,
+		},
+	},
+	{
+		.source = ANC_STANDBY,
+		.dest = ANC_ACTIVE,
+		.analogue = 1,
+		.step = {
+			wm2000_exit_standby,
+		},
+	},
+	{
+		.source = ANC_STANDBY,
+		.dest = ANC_BYPASS,
+		.analogue = 1,
+		.step = {
+			wm2000_exit_standby,
+			wm2000_enter_bypass,
+		},
+	},
+	{
+		.source = ANC_STANDBY,
+		.dest = ANC_OFF,
+		.step = {
+			wm2000_exit_standby,
+			wm2000_power_down,
+		},
+	},
+};
+
+static int wm2000_anc_transition(struct wm2000_priv *wm2000,
+				 enum wm2000_anc_mode mode)
+{
+	struct i2c_client *i2c = wm2000->i2c;
+	int i, j;
+	int ret = 0;
+
+	if (wm2000->anc_mode == mode)
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
+		if (anc_transitions[i].source == wm2000->anc_mode &&
+		    anc_transitions[i].dest == mode)
+			break;
+	if (i == ARRAY_SIZE(anc_transitions)) {
+		dev_err(&i2c->dev, "No transition for %d->%d\n",
+			wm2000->anc_mode, mode);
+		return -EINVAL;
+	}
+
+	/* Maintain clock while active */
+	if (anc_transitions[i].source == ANC_OFF) {
+		ret = clk_prepare_enable(wm2000->mclk);
+		if (ret != 0) {
+			dev_err(&i2c->dev, "Failed to enable MCLK: %d\n", ret);
+			return ret;
+		}
+	}
+
+	for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
+		if (!anc_transitions[i].step[j])
+			break;
+		ret = anc_transitions[i].step[j](i2c,
+						 anc_transitions[i].analogue);
+		if (ret != 0)
+			break;
+	}
+
+	if (anc_transitions[i].dest == ANC_OFF)
+		clk_disable_unprepare(wm2000->mclk);
+
+	return ret;
+}
+
+static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
+{
+	struct i2c_client *i2c = wm2000->i2c;
+	enum wm2000_anc_mode mode;
+
+	if (wm2000->anc_eng_ena && wm2000->spk_ena)
+		if (wm2000->anc_active)
+			mode = ANC_ACTIVE;
+		else
+			mode = ANC_BYPASS;
+	else
+		mode = ANC_STANDBY;
+
+	dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
+		mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
+		wm2000->anc_active);
+
+	return wm2000_anc_transition(wm2000, mode);
+}
+
+static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+
+	ucontrol->value.integer.value[0] = wm2000->anc_active;
+
+	return 0;
+}
+
+static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+	unsigned int anc_active = ucontrol->value.integer.value[0];
+	int ret;
+
+	if (anc_active > 1)
+		return -EINVAL;
+
+	mutex_lock(&wm2000->lock);
+
+	wm2000->anc_active = anc_active;
+
+	ret = wm2000_anc_set_mode(wm2000);
+
+	mutex_unlock(&wm2000->lock);
+
+	return ret;
+}
+
+static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+
+	ucontrol->value.integer.value[0] = wm2000->spk_ena;
+
+	return 0;
+}
+
+static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+	unsigned int val = ucontrol->value.integer.value[0];
+	int ret;
+
+	if (val > 1)
+		return -EINVAL;
+
+	mutex_lock(&wm2000->lock);
+
+	wm2000->spk_ena = val;
+
+	ret = wm2000_anc_set_mode(wm2000);
+
+	mutex_unlock(&wm2000->lock);
+
+	return ret;
+}
+
+static const struct snd_kcontrol_new wm2000_controls[] = {
+	SOC_SINGLE("ANC Volume", WM2000_REG_ANC_GAIN_CTRL, 0, 255, 0),
+	SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
+			    wm2000_anc_mode_get,
+			    wm2000_anc_mode_put),
+	SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
+			    wm2000_speaker_get,
+			    wm2000_speaker_put),
+};
+
+static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
+				  struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+	int ret;
+
+	mutex_lock(&wm2000->lock);
+
+	if (SND_SOC_DAPM_EVENT_ON(event))
+		wm2000->anc_eng_ena = 1;
+
+	if (SND_SOC_DAPM_EVENT_OFF(event))
+		wm2000->anc_eng_ena = 0;
+
+	ret = wm2000_anc_set_mode(wm2000);
+
+	mutex_unlock(&wm2000->lock);
+
+	return ret;
+}
+
+static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
+/* Externally visible pins */
+SND_SOC_DAPM_OUTPUT("SPKN"),
+SND_SOC_DAPM_OUTPUT("SPKP"),
+
+SND_SOC_DAPM_INPUT("LINN"),
+SND_SOC_DAPM_INPUT("LINP"),
+
+SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
+		   wm2000_anc_power_event,
+		   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+};
+
+/* Target, Path, Source */
+static const struct snd_soc_dapm_route wm2000_audio_map[] = {
+	{ "SPKN", NULL, "ANC Engine" },
+	{ "SPKP", NULL, "ANC Engine" },
+	{ "ANC Engine", NULL, "LINN" },
+	{ "ANC Engine", NULL, "LINP" },
+};
+
+#ifdef CONFIG_PM
+static int wm2000_suspend(struct snd_soc_component *component)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+
+	return wm2000_anc_transition(wm2000, ANC_OFF);
+}
+
+static int wm2000_resume(struct snd_soc_component *component)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+
+	return wm2000_anc_set_mode(wm2000);
+}
+#else
+#define wm2000_suspend NULL
+#define wm2000_resume NULL
+#endif
+
+static bool wm2000_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case WM2000_REG_SYS_START:
+	case WM2000_REG_ANC_GAIN_CTRL:
+	case WM2000_REG_MSE_TH1:
+	case WM2000_REG_MSE_TH2:
+	case WM2000_REG_SPEECH_CLARITY:
+	case WM2000_REG_SYS_WATCHDOG:
+	case WM2000_REG_ANA_VMID_PD_TIME:
+	case WM2000_REG_ANA_VMID_PU_TIME:
+	case WM2000_REG_CAT_FLTR_INDX:
+	case WM2000_REG_CAT_GAIN_0:
+	case WM2000_REG_SYS_STATUS:
+	case WM2000_REG_SYS_MODE_CNTRL:
+	case WM2000_REG_SYS_START0:
+	case WM2000_REG_SYS_START1:
+	case WM2000_REG_ID1:
+	case WM2000_REG_ID2:
+	case WM2000_REG_REVISON:
+	case WM2000_REG_SYS_CTL1:
+	case WM2000_REG_SYS_CTL2:
+	case WM2000_REG_ANC_STAT:
+	case WM2000_REG_IF_CTL:
+	case WM2000_REG_ANA_MIC_CTL:
+	case WM2000_REG_SPK_CTL:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config wm2000_regmap = {
+	.reg_bits = 16,
+	.val_bits = 8,
+
+	.max_register = WM2000_REG_SPK_CTL,
+	.readable_reg = wm2000_readable_reg,
+};
+
+static int wm2000_probe(struct snd_soc_component *component)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+
+	/* This will trigger a transition to standby mode by default */
+	wm2000_anc_set_mode(wm2000);
+
+	return 0;
+}
+
+static void wm2000_remove(struct snd_soc_component *component)
+{
+	struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
+
+	wm2000_anc_transition(wm2000, ANC_OFF);
+}
+
+static const struct snd_soc_component_driver soc_component_dev_wm2000 = {
+	.probe			= wm2000_probe,
+	.remove			= wm2000_remove,
+	.suspend		= wm2000_suspend,
+	.resume			= wm2000_resume,
+	.controls		= wm2000_controls,
+	.num_controls		= ARRAY_SIZE(wm2000_controls),
+	.dapm_widgets		= wm2000_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(wm2000_dapm_widgets),
+	.dapm_routes		= wm2000_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(wm2000_audio_map),
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
+static int wm2000_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *i2c_id)
+{
+	struct wm2000_priv *wm2000;
+	struct wm2000_platform_data *pdata;
+	const char *filename;
+	const struct firmware *fw = NULL;
+	int ret, i;
+	int reg;
+	u16 id;
+
+	wm2000 = devm_kzalloc(&i2c->dev, sizeof(*wm2000), GFP_KERNEL);
+	if (!wm2000)
+		return -ENOMEM;
+
+	mutex_init(&wm2000->lock);
+
+	dev_set_drvdata(&i2c->dev, wm2000);
+
+	wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap);
+	if (IS_ERR(wm2000->regmap)) {
+		ret = PTR_ERR(wm2000->regmap);
+		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+			ret);
+		goto out;
+	}
+
+	for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
+		wm2000->supplies[i].supply = wm2000_supplies[i];
+
+	ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
+				      wm2000->supplies);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
+	/* Verify that this is a WM2000 */
+	reg = wm2000_read(i2c, WM2000_REG_ID1);
+	id = reg << 8;
+	reg = wm2000_read(i2c, WM2000_REG_ID2);
+	id |= reg & 0xff;
+
+	if (id != 0x2000) {
+		dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
+		ret = -ENODEV;
+		goto err_supplies;
+	}
+
+	reg = wm2000_read(i2c, WM2000_REG_REVISON);
+	dev_info(&i2c->dev, "revision %c\n", reg + 'A');
+
+	wm2000->mclk = devm_clk_get(&i2c->dev, "MCLK");
+	if (IS_ERR(wm2000->mclk)) {
+		ret = PTR_ERR(wm2000->mclk);
+		dev_err(&i2c->dev, "Failed to get MCLK: %d\n", ret);
+		goto err_supplies;
+	}
+
+	filename = "wm2000_anc.bin";
+	pdata = dev_get_platdata(&i2c->dev);
+	if (pdata) {
+		wm2000->speech_clarity = !pdata->speech_enh_disable;
+
+		if (pdata->download_file)
+			filename = pdata->download_file;
+	}
+
+	ret = request_firmware(&fw, filename, &i2c->dev);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
+		goto err_supplies;
+	}
+
+	/* Pre-cook the concatenation of the register address onto the image */
+	wm2000->anc_download_size = fw->size + 2;
+	wm2000->anc_download = devm_kzalloc(&i2c->dev,
+					    wm2000->anc_download_size,
+					    GFP_KERNEL);
+	if (wm2000->anc_download == NULL) {
+		ret = -ENOMEM;
+		goto err_supplies;
+	}
+
+	wm2000->anc_download[0] = 0x80;
+	wm2000->anc_download[1] = 0x00;
+	memcpy(wm2000->anc_download + 2, fw->data, fw->size);
+
+	wm2000->anc_eng_ena = 1;
+	wm2000->anc_active = 1;
+	wm2000->spk_ena = 1;
+	wm2000->i2c = i2c;
+
+	wm2000_reset(wm2000);
+
+	ret = devm_snd_soc_register_component(&i2c->dev,
+					&soc_component_dev_wm2000, NULL, 0);
+
+err_supplies:
+	regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+
+out:
+	release_firmware(fw);
+	return ret;
+}
+
+static const struct i2c_device_id wm2000_i2c_id[] = {
+	{ "wm2000", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
+
+static struct i2c_driver wm2000_i2c_driver = {
+	.driver = {
+		.name = "wm2000",
+	},
+	.probe = wm2000_i2c_probe,
+	.id_table = wm2000_i2c_id,
+};
+
+module_i2c_driver(wm2000_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC WM2000 driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
+MODULE_LICENSE("GPL");