Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3a66d387 authored by Mark Brown's avatar Mark Brown
Browse files

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: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 6db29675

include/sound/wm2000.h

0 → 100644
+26 −0
Original line number Diff line number Diff line 
/*

 * 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

+4 −0
Original line number Diff line number Diff line
@@ -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

+2 −0
Original line number Diff line number Diff line
@@ -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.c

0 → 100644
+888 −0
Original line number Diff line number Diff line 
/*

 * wm2000.c  --  WM2000 ALSA Soc Audio driver

 *

 * Copyright 2008-2010 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 callibration 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/version.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/firmware.h>

#include <linux/delay.h>

#include <linux/pm.h>

#include <linux/i2c.h>

#include <linux/platform_device.h>

#include <linux/debugfs.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>

#include <sound/initval.h>

#include <sound/tlv.h>



#include <sound/wm2000.h>



#include "wm2000.h"



enum wm2000_anc_mode {

	ANC_ACTIVE = 0,

	ANC_BYPASS = 1,

	ANC_STANDBY = 2,

	ANC_OFF = 3,

};



struct wm2000_priv {

	struct i2c_client *i2c;



	enum wm2000_anc_mode anc_mode;



	unsigned int anc_active:1;

	unsigned int anc_eng_ena:1;

	unsigned int spk_ena:1;



	unsigned int mclk_div:1;

	unsigned int speech_clarity:1;



	int anc_download_size;

	char *anc_download;

};



static struct i2c_client *wm2000_i2c;



static int wm2000_write(struct i2c_client *i2c, unsigned int reg,

			unsigned int value)

{

	u8 data[3];

	int ret;



	data[0] = (reg >> 8) & 0xff;

	data[1] = reg & 0xff;

	data[2] = value & 0xff;



	dev_vdbg(&i2c->dev, "write %x = %x\n", reg, value);



	ret = i2c_master_send(i2c, data, 3);

	if (ret == 3)

		return 0;

	if (ret < 0)

		return ret;

	else

		return -EIO;

}



static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)

{

	struct i2c_msg xfer[2];

	u8 reg[2];

	u8 data;

	int ret;



	/* Write register */

	reg[0] = (r >> 8) & 0xff;

	reg[1] = r & 0xff;

	xfer[0].addr = i2c->addr;

	xfer[0].flags = 0;

	xfer[0].len = sizeof(reg);

	xfer[0].buf = &reg[0];



	/* Read data */

	xfer[1].addr = i2c->addr;

	xfer[1].flags = I2C_M_RD;

	xfer[1].len = 1;

	xfer[1].buf = &data;



	ret = i2c_transfer(i2c->adapter, xfer, 2);

	if (ret != 2) {

		dev_err(&i2c->dev, "i2c_transfer() returned %d\n", ret);

		return 0;

	}



	dev_vdbg(&i2c->dev, "read %x from %x\n", data, r);



	return data;

}



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)

{

	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);

	int ret, timeout;



	BUG_ON(wm2000->anc_mode != ANC_OFF);



	dev_dbg(&i2c->dev, "Beginning power up\n");



	if (!wm2000->mclk_div) {

		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, 1)) {

		dev_err(&i2c->dev, "ANC engine failed to reset\n");

		return -ETIMEDOUT;

	}



	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,

			     WM2000_STATUS_BOOT_COMPLETE, 1)) {

		dev_err(&i2c->dev, "ANC engine failed to initialise\n");

		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);

		return ret;

	}

	if (ret != wm2000->anc_download_size) {

		dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",

			ret, wm2000->anc_download_size);

		return -EIO;

	}



	dev_dbg(&i2c->dev, "Download complete\n");



	if (analogue) {

		timeout = 248;

		wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);



		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,

			     WM2000_MODE_ANA_SEQ_INCLUDE |

			     WM2000_MODE_MOUSE_ENABLE |

			     WM2000_MODE_THERMAL_ENABLE);

	} else {

		timeout = 10;



		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, timeout)) {

		dev_err(&i2c->dev, "Timed out waiting for device after %dms\n",

			timeout * 10);

		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);

	int timeout;



	if (analogue) {

		timeout = 248;

		wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);

		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,

			     WM2000_MODE_ANA_SEQ_INCLUDE |

			     WM2000_MODE_POWER_DOWN);

	} else {

		timeout = 10;

		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, timeout)) {

		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, 1)) {

		dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");

		return -ETIMEDOUT;

	}



	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);



	BUG_ON(wm2000->anc_mode != ANC_ACTIVE);



	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, 10)) {

		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, 1)) {

		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);



	BUG_ON(wm2000->anc_mode != ANC_BYPASS);

	

	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, 10)) {

		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);

	int timeout;



	BUG_ON(wm2000->anc_mode != ANC_ACTIVE);



	if (analogue) {

		timeout = 248;

		wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);



		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,

			     WM2000_MODE_ANA_SEQ_INCLUDE |

			     WM2000_MODE_THERMAL_ENABLE |

			     WM2000_MODE_STANDBY_ENTRY);

	} else {

		timeout = 10;



		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, timeout)) {

		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,

			     1)) {

		dev_err(&i2c->dev,

			"Timed out waiting for standby after %dms\n",

			timeout * 10);

		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);

	int timeout;



	BUG_ON(wm2000->anc_mode != ANC_STANDBY);



	wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);



	if (analogue) {

		timeout = 248;

		wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);



		wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,

			     WM2000_MODE_ANA_SEQ_INCLUDE |

			     WM2000_MODE_THERMAL_ENABLE |

			     WM2000_MODE_MOUSE_ENABLE);

	} else {

		timeout = 10;



		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, timeout)) {

		dev_err(&i2c->dev, "Timed out waiting for MOUSE after %dms\n",

			timeout * 10);

		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;



	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;

	}



	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)

			return ret;

	}



	return 0;

}



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 wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);



	ucontrol->value.enumerated.item[0] = wm2000->anc_active;



	return 0;

}



static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,

			       struct snd_ctl_elem_value *ucontrol)

{

	struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);

	int anc_active = ucontrol->value.enumerated.item[0];



	if (anc_active > 1)

		return -EINVAL;



	wm2000->anc_active = anc_active;



	return wm2000_anc_set_mode(wm2000);

}



static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,

			      struct snd_ctl_elem_value *ucontrol)

{

	struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);



	ucontrol->value.enumerated.item[0] = wm2000->spk_ena;



	return 0;

}



static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,

			      struct snd_ctl_elem_value *ucontrol)

{

	struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);

	int val = ucontrol->value.enumerated.item[0];



	if (val > 1)

		return -EINVAL;



	wm2000->spk_ena = val;



	return wm2000_anc_set_mode(wm2000);

}



static const struct snd_kcontrol_new wm2000_controls[] = {

	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 wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);



	if (SND_SOC_DAPM_EVENT_ON(event))

		wm2000->anc_eng_ena = 1;



	if (SND_SOC_DAPM_EVENT_OFF(event))

		wm2000->anc_eng_ena = 0;



	return wm2000_anc_set_mode(wm2000);

}



static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {

/* Externally visible pins */

SND_SOC_DAPM_OUTPUT("WM2000 SPKN"),

SND_SOC_DAPM_OUTPUT("WM2000 SPKP"),



SND_SOC_DAPM_INPUT("WM2000 LINN"),

SND_SOC_DAPM_INPUT("WM2000 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 audio_map[] = {

	{ "WM2000 SPKN", NULL, "ANC Engine" },

	{ "WM2000 SPKP", NULL, "ANC Engine" },

	{ "ANC Engine", NULL, "WM2000 LINN" },

	{ "ANC Engine", NULL, "WM2000 LINP" },

};



/* Called from the machine driver */

int wm2000_add_controls(struct snd_soc_codec *codec)

{

	int ret;



	if (!wm2000_i2c) {

		pr_err("WM2000 not yet probed\n");

		return -ENODEV;

	}



	ret = snd_soc_dapm_new_controls(codec, wm2000_dapm_widgets,

					ARRAY_SIZE(wm2000_dapm_widgets));

	if (ret < 0)

		return ret;



	ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

	if (ret < 0)

		return ret;



	return snd_soc_add_controls(codec, wm2000_controls,

			ARRAY_SIZE(wm2000_controls));

}

EXPORT_SYMBOL_GPL(wm2000_add_controls);



static int __devinit 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;

	int reg, ret;

	u16 id;



	if (wm2000_i2c) {

		dev_err(&i2c->dev, "Another WM2000 is already registered\n");

		return -EINVAL;

	}



	wm2000 = kzalloc(sizeof(struct wm2000_priv), GFP_KERNEL);

	if (wm2000 == NULL) {

		dev_err(&i2c->dev, "Unable to allocate private data\n");

		return -ENOMEM;

	}



	/* 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;

	}



	reg = wm2000_read(i2c, WM2000_REG_REVISON);

	dev_info(&i2c->dev, "revision %c\n", reg + 'A');



	filename = "wm2000_anc.bin";

	pdata = dev_get_platdata(&i2c->dev);

	if (pdata) {

		wm2000->mclk_div = pdata->mclkdiv2;

		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;

	}



	/* Pre-cook the concatenation of the register address onto the image */

	wm2000->anc_download_size = fw->size + 2;

	wm2000->anc_download = kmalloc(wm2000->anc_download_size, GFP_KERNEL);

	if (wm2000->anc_download == NULL) {

		dev_err(&i2c->dev, "Out of memory\n");

		ret = -ENOMEM;

		goto err_fw;

	}



	wm2000->anc_download[0] = 0x80;

	wm2000->anc_download[1] = 0x00;

	memcpy(wm2000->anc_download + 2, fw->data, fw->size);



	release_firmware(fw);



	dev_set_drvdata(&i2c->dev, wm2000);

	wm2000->anc_eng_ena = 1;

	wm2000->i2c = i2c;



	wm2000_reset(wm2000);



	/* This will trigger a transition to standby mode by default */

	wm2000_anc_set_mode(wm2000);	



	wm2000_i2c = i2c;



	return 0;



err_fw:

	release_firmware(fw);

err:

	kfree(wm2000);

	return ret;

}



static __devexit int wm2000_i2c_remove(struct i2c_client *i2c)

{

	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);



	wm2000_anc_transition(wm2000, ANC_OFF);



	wm2000_i2c = NULL;

	kfree(wm2000->anc_download);

	kfree(wm2000);



	return 0;

}



static void wm2000_i2c_shutdown(struct i2c_client *i2c)

{

	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);



	wm2000_anc_transition(wm2000, ANC_OFF);

}



#ifdef CONFIG_PM

static int wm2000_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg)

{

	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);



	return wm2000_anc_transition(wm2000, ANC_OFF);

}



static int wm2000_i2c_resume(struct i2c_client *i2c)

{

	struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);



	return wm2000_anc_set_mode(wm2000);

}

#else

#define wm2000_i2c_suspend NULL

#define wm2000_i2c_resume NULL

#endif



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",

		.owner = THIS_MODULE,

	},

	.probe = wm2000_i2c_probe,

	.remove = __devexit_p(wm2000_i2c_remove),

	.suspend = wm2000_i2c_suspend,

	.resume = wm2000_i2c_resume,

	.shutdown = wm2000_i2c_shutdown,

	.id_table = wm2000_i2c_id,

};



static int __init wm2000_init(void)

{

	return i2c_add_driver(&wm2000_i2c_driver);

}

module_init(wm2000_init);



static void __exit wm2000_exit(void)

{

	i2c_del_driver(&wm2000_i2c_driver);

}

module_exit(wm2000_exit);



MODULE_DESCRIPTION("ASoC WM2000 driver");

MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");

MODULE_LICENSE("GPL");