[deliverable/linux.git] / drivers / mfd / wm8994-core.c

/*
 * wm8994-core.c  --  Device access for Wolfson WM8994
 *
 * Copyright 2009 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 as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/machine.h>

#include <linux/mfd/wm8994/core.h>
#include <linux/mfd/wm8994/pdata.h>
#include <linux/mfd/wm8994/registers.h>

#include "wm8994.h"

/**
 * wm8994_reg_read: Read a single WM8994 register.
 *
 * @wm8994: Device to read from.
 * @reg: Register to read.
 */
int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg)
{
	unsigned int val;
	int ret;

	ret = regmap_read(wm8994->regmap, reg, &val);

	if (ret < 0)
		return ret;
	else
		return val;
}
EXPORT_SYMBOL_GPL(wm8994_reg_read);

/**
 * wm8994_bulk_read: Read multiple WM8994 registers
 *
 * @wm8994: Device to read from
 * @reg: First register
 * @count: Number of registers
 * @buf: Buffer to fill.  The data will be returned big endian.
 */
int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
		     int count, u16 *buf)
{
	return regmap_bulk_read(wm8994->regmap, reg, buf, count);
}

/**
 * wm8994_reg_write: Write a single WM8994 register.
 *
 * @wm8994: Device to write to.
 * @reg: Register to write to.
 * @val: Value to write.
 */
int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
		     unsigned short val)
{
	return regmap_write(wm8994->regmap, reg, val);
}
EXPORT_SYMBOL_GPL(wm8994_reg_write);

/**
 * wm8994_bulk_write: Write multiple WM8994 registers
 *
 * @wm8994: Device to write to
 * @reg: First register
 * @count: Number of registers
 * @buf: Buffer to write from.  Data must be big-endian formatted.
 */
int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
		      int count, const u16 *buf)
{
	return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16));
}
EXPORT_SYMBOL_GPL(wm8994_bulk_write);

/**
 * wm8994_set_bits: Set the value of a bitfield in a WM8994 register
 *
 * @wm8994: Device to write to.
 * @reg: Register to write to.
 * @mask: Mask of bits to set.
 * @val: Value to set (unshifted)
 */
int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
		    unsigned short mask, unsigned short val)
{
	return regmap_update_bits(wm8994->regmap, reg, mask, val);
}
EXPORT_SYMBOL_GPL(wm8994_set_bits);

static struct mfd_cell wm8994_regulator_devs[] = {
	{
		.name = "wm8994-ldo",
		.id = 1,
		.pm_runtime_no_callbacks = true,
	},
	{
		.name = "wm8994-ldo",
		.id = 2,
		.pm_runtime_no_callbacks = true,
	},
};

static struct resource wm8994_codec_resources[] = {
	{
		.start = WM8994_IRQ_TEMP_SHUT,
		.end   = WM8994_IRQ_TEMP_WARN,
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource wm8994_gpio_resources[] = {
	{
		.start = WM8994_IRQ_GPIO(1),
		.end   = WM8994_IRQ_GPIO(11),
		.flags = IORESOURCE_IRQ,
	},
};

static struct mfd_cell wm8994_devs[] = {
	{
		.name = "wm8994-codec",
		.num_resources = ARRAY_SIZE(wm8994_codec_resources),
		.resources = wm8994_codec_resources,
	},

	{
		.name = "wm8994-gpio",
		.num_resources = ARRAY_SIZE(wm8994_gpio_resources),
		.resources = wm8994_gpio_resources,
		.pm_runtime_no_callbacks = true,
	},
};

/*
 * Supplies for the main bulk of CODEC; the LDO supplies are ignored
 * and should be handled via the standard regulator API supply
 * management.
 */
static const char *wm1811_main_supplies[] = {
	"DBVDD1",
	"DBVDD2",
	"DBVDD3",
	"DCVDD",
	"AVDD1",
	"AVDD2",
	"CPVDD",
	"SPKVDD1",
	"SPKVDD2",
};

static const char *wm8994_main_supplies[] = {
	"DBVDD",
	"DCVDD",
	"AVDD1",
	"AVDD2",
	"CPVDD",
	"SPKVDD1",
	"SPKVDD2",
};

static const char *wm8958_main_supplies[] = {
	"DBVDD1",
	"DBVDD2",
	"DBVDD3",
	"DCVDD",
	"AVDD1",
	"AVDD2",
	"CPVDD",
	"SPKVDD1",
	"SPKVDD2",
};

#ifdef CONFIG_PM
static int wm8994_suspend(struct device *dev)
{
	struct wm8994 *wm8994 = dev_get_drvdata(dev);
	int ret;

	/* Don't actually go through with the suspend if the CODEC is
	 * still active (eg, for audio passthrough from CP. */
	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1);
	if (ret < 0) {
		dev_err(dev, "Failed to read power status: %d\n", ret);
	} else if (ret & WM8994_VMID_SEL_MASK) {
		dev_dbg(dev, "CODEC still active, ignoring suspend\n");
		return 0;
	}

	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4);
	if (ret < 0) {
		dev_err(dev, "Failed to read power status: %d\n", ret);
	} else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA |
			  WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA |
			  WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) {
		dev_dbg(dev, "CODEC still active, ignoring suspend\n");
		return 0;
	}

	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5);
	if (ret < 0) {
		dev_err(dev, "Failed to read power status: %d\n", ret);
	} else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA |
			  WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA |
			  WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) {
		dev_dbg(dev, "CODEC still active, ignoring suspend\n");
		return 0;
	}

	switch (wm8994->type) {
	case WM8958:
		ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
		if (ret < 0) {
			dev_err(dev, "Failed to read power status: %d\n", ret);
		} else if (ret & WM8958_MICD_ENA) {
			dev_dbg(dev, "CODEC still active, ignoring suspend\n");
			return 0;
		}
		break;
	default:
		break;
	}

	/* Disable LDO pulldowns while the device is suspended if we
	 * don't know that something will be driving them. */
	if (!wm8994->ldo_ena_always_driven)
		wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
				WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
				WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD);

	/* Explicitly put the device into reset in case regulators
	 * don't get disabled in order to ensure consistent restart.
	 */
	wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
			 wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));

	regcache_mark_dirty(wm8994->regmap);

	wm8994->suspended = true;

	ret = regulator_bulk_disable(wm8994->num_supplies,
				     wm8994->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to disable supplies: %d\n", ret);
		return ret;
	}

	return 0;
}

static int wm8994_resume(struct device *dev)
{
	struct wm8994 *wm8994 = dev_get_drvdata(dev);
	int ret;

	/* We may have lied to the PM core about suspending */
	if (!wm8994->suspended)
		return 0;

	ret = regulator_bulk_enable(wm8994->num_supplies,
				    wm8994->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to enable supplies: %d\n", ret);
		return ret;
	}

	ret = regcache_sync(wm8994->regmap);
	if (ret != 0) {
		dev_err(dev, "Failed to restore register map: %d\n", ret);
		goto err_enable;
	}

	/* Disable LDO pulldowns while the device is active */
	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
			WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
			0);

	wm8994->suspended = false;

	return 0;

err_enable:
	regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);

	return ret;
}
#endif

#ifdef CONFIG_REGULATOR
static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
{
	struct wm8994_ldo_pdata *ldo_pdata;

	if (!pdata)
		return 0;

	ldo_pdata = &pdata->ldo[ldo];

	if (!ldo_pdata->init_data)
		return 0;

	return ldo_pdata->init_data->num_consumer_supplies != 0;
}
#else
static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
{
	return 0;
}
#endif

/*
 * Instantiate the generic non-control parts of the device.
 */
static int wm8994_device_init(struct wm8994 *wm8994, int irq)
{
	struct wm8994_pdata *pdata = wm8994->dev->platform_data;
	struct regmap_config *regmap_config;
	const char *devname;
	int ret, i;
	int pulls = 0;

	dev_set_drvdata(wm8994->dev, wm8994);

	/* Add the on-chip regulators first for bootstrapping */
	ret = mfd_add_devices(wm8994->dev, -1,
			      wm8994_regulator_devs,
			      ARRAY_SIZE(wm8994_regulator_devs),
			      NULL, 0);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
		goto err_regmap;
	}

	switch (wm8994->type) {
	case WM1811:
		wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
		break;
	case WM8994:
		wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
		break;
	case WM8958:
		wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
		break;
	default:
		BUG();
		goto err_regmap;
	}

	wm8994->supplies = devm_kzalloc(wm8994->dev,
					sizeof(struct regulator_bulk_data) *
					wm8994->num_supplies, GFP_KERNEL);
	if (!wm8994->supplies) {
		ret = -ENOMEM;
		goto err_regmap;
	}

	switch (wm8994->type) {
	case WM1811:
		for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
			wm8994->supplies[i].supply = wm1811_main_supplies[i];
		break;
	case WM8994:
		for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
			wm8994->supplies[i].supply = wm8994_main_supplies[i];
		break;
	case WM8958:
		for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
			wm8994->supplies[i].supply = wm8958_main_supplies[i];
		break;
	default:
		BUG();
		goto err_regmap;
	}
		
	ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
				 wm8994->supplies);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
		goto err_regmap;
	}

	ret = regulator_bulk_enable(wm8994->num_supplies,
				    wm8994->supplies);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
		goto err_get;
	}

	ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
	if (ret < 0) {
		dev_err(wm8994->dev, "Failed to read ID register\n");
		goto err_enable;
	}
	switch (ret) {
	case 0x1811:
		devname = "WM1811";
		if (wm8994->type != WM1811)
			dev_warn(wm8994->dev, "Device registered as type %d\n",
				 wm8994->type);
		wm8994->type = WM1811;
		break;
	case 0x8994:
		devname = "WM8994";
		if (wm8994->type != WM8994)
			dev_warn(wm8994->dev, "Device registered as type %d\n",
				 wm8994->type);
		wm8994->type = WM8994;
		break;
	case 0x8958:
		devname = "WM8958";
		if (wm8994->type != WM8958)
			dev_warn(wm8994->dev, "Device registered as type %d\n",
				 wm8994->type);
		wm8994->type = WM8958;
		break;
	default:
		dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
			ret);
		ret = -EINVAL;
		goto err_enable;
	}

	ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
	if (ret < 0) {
		dev_err(wm8994->dev, "Failed to read revision register: %d\n",
			ret);
		goto err_enable;
	}
	wm8994->revision = ret;

	switch (wm8994->type) {
	case WM8994:
		switch (wm8994->revision) {
		case 0:
		case 1:
			dev_warn(wm8994->dev,
				 "revision %c not fully supported\n",
				 'A' + wm8994->revision);
			break;
		default:
			break;
		}
		break;
	case WM1811:
		/* Revision C did not change the relevant layer */
		if (wm8994->revision > 1)
			wm8994->revision++;
		break;
	default:
		break;
	}

	dev_info(wm8994->dev, "%s revision %c\n", devname,
		 'A' + wm8994->revision);

	switch (wm8994->type) {
	case WM1811:
		regmap_config = &wm1811_regmap_config;
		break;
	case WM8994:
		regmap_config = &wm8994_regmap_config;
		break;
	case WM8958:
		regmap_config = &wm8958_regmap_config;
		break;
	default:
		dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
		return -EINVAL;
	}

	ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
			ret);
		return ret;
	}

	if (pdata) {
		wm8994->irq_base = pdata->irq_base;
		wm8994->gpio_base = pdata->gpio_base;

		/* GPIO configuration is only applied if it's non-zero */
		for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
			if (pdata->gpio_defaults[i]) {
				wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
						0xffff,
						pdata->gpio_defaults[i]);
			}
		}

		wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;

		if (pdata->spkmode_pu)
			pulls |= WM8994_SPKMODE_PU;
	}

	/* Disable unneeded pulls */
	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
			WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD |
			WM8994_SPKMODE_PU | WM8994_CSNADDR_PD,
			pulls);

	/* In some system designs where the regulators are not in use,
	 * we can achieve a small reduction in leakage currents by
	 * floating LDO outputs.  This bit makes no difference if the
	 * LDOs are enabled, it only affects cases where the LDOs were
	 * in operation and are then disabled.
	 */
	for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
		if (wm8994_ldo_in_use(pdata, i))
			wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
					WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
		else
			wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
					WM8994_LDO1_DISCH, 0);
	}

	wm8994_irq_init(wm8994);

	ret = mfd_add_devices(wm8994->dev, -1,
			      wm8994_devs, ARRAY_SIZE(wm8994_devs),
			      NULL, 0);
	if (ret != 0) {
		dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
		goto err_irq;
	}

	pm_runtime_enable(wm8994->dev);
	pm_runtime_resume(wm8994->dev);

	return 0;

err_irq:
	wm8994_irq_exit(wm8994);
err_enable:
	regulator_bulk_disable(wm8994->num_supplies,
			       wm8994->supplies);
err_get:
	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
err_regmap:
	regmap_exit(wm8994->regmap);
	mfd_remove_devices(wm8994->dev);
	return ret;
}

static void wm8994_device_exit(struct wm8994 *wm8994)
{
	pm_runtime_disable(wm8994->dev);
	mfd_remove_devices(wm8994->dev);
	wm8994_irq_exit(wm8994);
	regulator_bulk_disable(wm8994->num_supplies,
			       wm8994->supplies);
	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
	regmap_exit(wm8994->regmap);
}

static const struct of_device_id wm8994_of_match[] = {
	{ .compatible = "wlf,wm1811", },
	{ .compatible = "wlf,wm8994", },
	{ .compatible = "wlf,wm8958", },
	{ }
};
MODULE_DEVICE_TABLE(of, wm8994_of_match);

static int wm8994_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct wm8994 *wm8994;
	int ret;

	wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
	if (wm8994 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, wm8994);
	wm8994->dev = &i2c->dev;
	wm8994->irq = i2c->irq;
	wm8994->type = id->driver_data;

	wm8994->regmap = regmap_init_i2c(i2c, &wm8994_base_regmap_config);
	if (IS_ERR(wm8994->regmap)) {
		ret = PTR_ERR(wm8994->regmap);
		dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	return wm8994_device_init(wm8994, i2c->irq);
}

static int wm8994_i2c_remove(struct i2c_client *i2c)
{
	struct wm8994 *wm8994 = i2c_get_clientdata(i2c);

	wm8994_device_exit(wm8994);

	return 0;
}

static const struct i2c_device_id wm8994_i2c_id[] = {
	{ "wm1811", WM1811 },
	{ "wm1811a", WM1811 },
	{ "wm8994", WM8994 },
	{ "wm8958", WM8958 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);

static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume,
			    NULL);

static struct i2c_driver wm8994_i2c_driver = {
	.driver = {
		.name = "wm8994",
		.owner = THIS_MODULE,
		.pm = &wm8994_pm_ops,
		.of_match_table = wm8994_of_match,
	},
	.probe = wm8994_i2c_probe,
	.remove = wm8994_i2c_remove,
	.id_table = wm8994_i2c_id,
};

static int __init wm8994_i2c_init(void)
{
	int ret;

	ret = i2c_add_driver(&wm8994_i2c_driver);
	if (ret != 0)
		pr_err("Failed to register wm8994 I2C driver: %d\n", ret);

	return ret;
}
module_init(wm8994_i2c_init);

static void __exit wm8994_i2c_exit(void)
{
	i2c_del_driver(&wm8994_i2c_driver);
}
module_exit(wm8994_i2c_exit);

MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
Commit	Line	Data
9e501086 MB	1	/*
	2	* wm8994-core.c -- Device access for Wolfson WM8994
	3	*
	4	* Copyright 2009 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
5a0e3ad6	17	#include <linux/slab.h>
9e501086	18	#include <linux/i2c.h>
d6c645fc	19	#include <linux/err.h>
9e501086 MB	20	#include <linux/delay.h>
9e501086 MB	21	#include <linux/mfd/core.h>
d450f19e	22	#include <linux/pm_runtime.h>
d6c645fc	23	#include <linux/regmap.h>
9e501086 MB	24	#include <linux/regulator/consumer.h>
	25	#include <linux/regulator/machine.h>
	26
	27	#include <linux/mfd/wm8994/core.h>
	28	#include <linux/mfd/wm8994/pdata.h>
	29	#include <linux/mfd/wm8994/registers.h>
	30
c3f13861	31	#include "wm8994.h"
9e501086 MB	32
	33	/**
	34	* wm8994_reg_read: Read a single WM8994 register.
	35	*
	36	* @wm8994: Device to read from.
	37	* @reg: Register to read.
	38	*/
	39	int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg)
	40	{
d6c645fc	41	unsigned int val;
9e501086 MB	42	int ret;
9e501086 MB	43
d6c645fc	44	ret = regmap_read(wm8994->regmap, reg, &val);
9e501086 MB	45
	46	if (ret < 0)
	47	return ret;
	48	else
d6c645fc	49	return val;
9e501086 MB	50	}
	51	EXPORT_SYMBOL_GPL(wm8994_reg_read);
	52
	53	/**
	54	* wm8994_bulk_read: Read multiple WM8994 registers
	55	*
	56	* @wm8994: Device to read from
	57	* @reg: First register
	58	* @count: Number of registers
316b6cc0	59	* @buf: Buffer to fill. The data will be returned big endian.
9e501086 MB	60	*/
	61	int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
	62	int count, u16 *buf)
	63	{
d6c645fc	64	return regmap_bulk_read(wm8994->regmap, reg, buf, count);
9e501086	65	}
9e501086	66
9e501086 MB	67	/**
	68	* wm8994_reg_write: Write a single WM8994 register.
	69	*
	70	* @wm8994: Device to write to.
	71	* @reg: Register to write to.
	72	* @val: Value to write.
	73	*/
	74	int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
	75	unsigned short val)
	76	{
d6c645fc	77	return regmap_write(wm8994->regmap, reg, val);
9e501086 MB	78	}
	79	EXPORT_SYMBOL_GPL(wm8994_reg_write);
	80
e93c5387 MB	81	/**
	82	* wm8994_bulk_write: Write multiple WM8994 registers
	83	*
	84	* @wm8994: Device to write to
	85	* @reg: First register
	86	* @count: Number of registers
4277163c	87	* @buf: Buffer to write from. Data must be big-endian formatted.
e93c5387 MB	88	*/
e93c5387 MB	89	int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
07e73fbb	90	int count, const u16 *buf)
e93c5387	91	{
d6c645fc	92	return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16));
e93c5387 MB	93	}
	94	EXPORT_SYMBOL_GPL(wm8994_bulk_write);
	95
9e501086 MB	96	/**
	97	* wm8994_set_bits: Set the value of a bitfield in a WM8994 register
	98	*
	99	* @wm8994: Device to write to.
	100	* @reg: Register to write to.
	101	* @mask: Mask of bits to set.
	102	* @val: Value to set (unshifted)
	103	*/
	104	int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
	105	unsigned short mask, unsigned short val)
	106	{
d6c645fc	107	return regmap_update_bits(wm8994->regmap, reg, mask, val);
9e501086 MB	108	}
	109	EXPORT_SYMBOL_GPL(wm8994_set_bits);
	110
	111	static struct mfd_cell wm8994_regulator_devs[] = {
d450f19e MB	112	{
	113	.name = "wm8994-ldo",
	114	.id = 1,
	115	.pm_runtime_no_callbacks = true,
	116	},
	117	{
	118	.name = "wm8994-ldo",
	119	.id = 2,
	120	.pm_runtime_no_callbacks = true,
	121	},
9e501086 MB	122	};
9e501086 MB	123
c9fbf7e0 MB	124	static struct resource wm8994_codec_resources[] = {
	125	{
	126	.start = WM8994_IRQ_TEMP_SHUT,
	127	.end = WM8994_IRQ_TEMP_WARN,
	128	.flags = IORESOURCE_IRQ,
	129	},
	130	};
	131
	132	static struct resource wm8994_gpio_resources[] = {
	133	{
	134	.start = WM8994_IRQ_GPIO(1),
	135	.end = WM8994_IRQ_GPIO(11),
	136	.flags = IORESOURCE_IRQ,
	137	},
	138	};
	139
9e501086	140	static struct mfd_cell wm8994_devs[] = {
c9fbf7e0 MB	141	{
	142	.name = "wm8994-codec",
	143	.num_resources = ARRAY_SIZE(wm8994_codec_resources),
	144	.resources = wm8994_codec_resources,
	145	},
	146
	147	{
	148	.name = "wm8994-gpio",
	149	.num_resources = ARRAY_SIZE(wm8994_gpio_resources),
	150	.resources = wm8994_gpio_resources,
d450f19e	151	.pm_runtime_no_callbacks = true,
c9fbf7e0	152	},
9e501086 MB	153	};
	154
	155	/*
	156	* Supplies for the main bulk of CODEC; the LDO supplies are ignored
	157	* and should be handled via the standard regulator API supply
	158	* management.
	159	*/
b1f43bf3 MB	160	static const char *wm1811_main_supplies[] = {
	161	"DBVDD1",
	162	"DBVDD2",
	163	"DBVDD3",
	164	"DCVDD",
	165	"AVDD1",
	166	"AVDD2",
	167	"CPVDD",
	168	"SPKVDD1",
	169	"SPKVDD2",
	170	};
	171
9e501086 MB	172	static const char *wm8994_main_supplies[] = {
	173	"DBVDD",
	174	"DCVDD",
	175	"AVDD1",
	176	"AVDD2",
	177	"CPVDD",
	178	"SPKVDD1",
	179	"SPKVDD2",
	180	};
	181
559e0df6 MB	182	static const char *wm8958_main_supplies[] = {
	183	"DBVDD1",
	184	"DBVDD2",
	185	"DBVDD3",
	186	"DCVDD",
	187	"AVDD1",
	188	"AVDD2",
	189	"CPVDD",
	190	"SPKVDD1",
	191	"SPKVDD2",
	192	};
	193
9e501086	194	#ifdef CONFIG_PM
d450f19e	195	static int wm8994_suspend(struct device *dev)
9e501086 MB	196	{
	197	struct wm8994 *wm8994 = dev_get_drvdata(dev);
	198	int ret;
	199
77bd70e9 MB	200	/* Don't actually go through with the suspend if the CODEC is
	201	* still active (eg, for audio passthrough from CP. */
	202	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1);
	203	if (ret < 0) {
	204	dev_err(dev, "Failed to read power status: %d\n", ret);
	205	} else if (ret & WM8994_VMID_SEL_MASK) {
	206	dev_dbg(dev, "CODEC still active, ignoring suspend\n");
	207	return 0;
	208	}
	209
5f40c6b6 MB	210	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4);
	211	if (ret < 0) {
	212	dev_err(dev, "Failed to read power status: %d\n", ret);
	213	} else if (ret & (WM8994_AIF2ADCL_ENA \| WM8994_AIF2ADCR_ENA \|
	214	WM8994_AIF1ADC2L_ENA \| WM8994_AIF1ADC2R_ENA \|
	215	WM8994_AIF1ADC1L_ENA \| WM8994_AIF1ADC1R_ENA)) {
	216	dev_dbg(dev, "CODEC still active, ignoring suspend\n");
	217	return 0;
	218	}
	219
	220	ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5);
	221	if (ret < 0) {
	222	dev_err(dev, "Failed to read power status: %d\n", ret);
	223	} else if (ret & (WM8994_AIF2DACL_ENA \| WM8994_AIF2DACR_ENA \|
	224	WM8994_AIF1DAC2L_ENA \| WM8994_AIF1DAC2R_ENA \|
	225	WM8994_AIF1DAC1L_ENA \| WM8994_AIF1DAC1R_ENA)) {
	226	dev_dbg(dev, "CODEC still active, ignoring suspend\n");
	227	return 0;
	228	}
	229
	230	switch (wm8994->type) {
	231	case WM8958:
	232	ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
	233	if (ret < 0) {
	234	dev_err(dev, "Failed to read power status: %d\n", ret);
	235	} else if (ret & WM8958_MICD_ENA) {
	236	dev_dbg(dev, "CODEC still active, ignoring suspend\n");
	237	return 0;
	238	}
	239	break;
	240	default:
	241	break;
	242	}
	243
881de670 MB	244	/* Disable LDO pulldowns while the device is suspended if we
	245	* don't know that something will be driving them. */
	246	if (!wm8994->ldo_ena_always_driven)
	247	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
	248	WM8994_LDO1ENA_PD \| WM8994_LDO2ENA_PD,
	249	WM8994_LDO1ENA_PD \| WM8994_LDO2ENA_PD);
	250
f40dff9e MB	251	/* Explicitly put the device into reset in case regulators
	252	* don't get disabled in order to ensure consistent restart.
	253	*/
be79cf2f MB	254	wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
be79cf2f MB	255	wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
f40dff9e	256
c3f13861 MB	257	regcache_mark_dirty(wm8994->regmap);
c3f13861 MB	258
77bd70e9 MB	259	wm8994->suspended = true;
77bd70e9 MB	260
559e0df6	261	ret = regulator_bulk_disable(wm8994->num_supplies,
9e501086 MB	262	wm8994->supplies);
	263	if (ret != 0) {
	264	dev_err(dev, "Failed to disable supplies: %d\n", ret);
	265	return ret;
	266	}
	267
	268	return 0;
	269	}
	270
d450f19e	271	static int wm8994_resume(struct device *dev)
9e501086 MB	272	{
9e501086 MB	273	struct wm8994 *wm8994 = dev_get_drvdata(dev);
c3f13861	274	int ret;
9e501086	275
77bd70e9 MB	276	/* We may have lied to the PM core about suspending */
	277	if (!wm8994->suspended)
	278	return 0;
	279
559e0df6	280	ret = regulator_bulk_enable(wm8994->num_supplies,
9e501086 MB	281	wm8994->supplies);
	282	if (ret != 0) {
	283	dev_err(dev, "Failed to enable supplies: %d\n", ret);
	284	return ret;
	285	}
	286
c3f13861 MB	287	ret = regcache_sync(wm8994->regmap);
	288	if (ret != 0) {
	289	dev_err(dev, "Failed to restore register map: %d\n", ret);
	290	goto err_enable;
98ae1cca	291	}
c9fbf7e0	292
881de670 MB	293	/* Disable LDO pulldowns while the device is active */
	294	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
	295	WM8994_LDO1ENA_PD \| WM8994_LDO2ENA_PD,
	296	0);
	297
77bd70e9 MB	298	wm8994->suspended = false;
77bd70e9 MB	299
9e501086	300	return 0;
c3f13861 MB	301
	302	err_enable:
	303	regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
	304
	305	return ret;
9e501086 MB	306	}
	307	#endif
	308
	309	#ifdef CONFIG_REGULATOR
	310	static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
	311	{
	312	struct wm8994_ldo_pdata *ldo_pdata;
	313
	314	if (!pdata)
	315	return 0;
	316
	317	ldo_pdata = &pdata->ldo[ldo];
	318
	319	if (!ldo_pdata->init_data)
	320	return 0;
	321
	322	return ldo_pdata->init_data->num_consumer_supplies != 0;
	323	}
	324	#else
	325	static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
	326	{
	327	return 0;
	328	}
	329	#endif
	330
	331	/*
	332	* Instantiate the generic non-control parts of the device.
	333	*/
559e0df6	334	static int wm8994_device_init(struct wm8994 *wm8994, int irq)
9e501086 MB	335	{
9e501086 MB	336	struct wm8994_pdata *pdata = wm8994->dev->platform_data;
34697898	337	struct regmap_config *regmap_config;
559e0df6	338	const char *devname;
9e501086	339	int ret, i;
26c34c25	340	int pulls = 0;
9e501086	341
9e501086 MB	342	dev_set_drvdata(wm8994->dev, wm8994);
	343
	344	/* Add the on-chip regulators first for bootstrapping */
	345	ret = mfd_add_devices(wm8994->dev, -1,
	346	wm8994_regulator_devs,
	347	ARRAY_SIZE(wm8994_regulator_devs),
	348	NULL, 0);
	349	if (ret != 0) {
	350	dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
d6c645fc	351	goto err_regmap;
9e501086 MB	352	}
9e501086 MB	353
559e0df6	354	switch (wm8994->type) {
b1f43bf3 MB	355	case WM1811:
	356	wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
	357	break;
559e0df6 MB	358	case WM8994:
	359	wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
	360	break;
	361	case WM8958:
	362	wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
	363	break;
	364	default:
	365	BUG();
d6c645fc	366	goto err_regmap;
559e0df6 MB	367	}
559e0df6 MB	368
2fa33494 MB	369	wm8994->supplies = devm_kzalloc(wm8994->dev,
	370	sizeof(struct regulator_bulk_data) *
	371	wm8994->num_supplies, GFP_KERNEL);
fccbd21f AL	372	if (!wm8994->supplies) {
fccbd21f AL	373	ret = -ENOMEM;
d6c645fc	374	goto err_regmap;
fccbd21f	375	}
9e501086	376
559e0df6	377	switch (wm8994->type) {
b1f43bf3 MB	378	case WM1811:
	379	for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
	380	wm8994->supplies[i].supply = wm1811_main_supplies[i];
	381	break;
559e0df6 MB	382	case WM8994:
	383	for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
	384	wm8994->supplies[i].supply = wm8994_main_supplies[i];
	385	break;
	386	case WM8958:
	387	for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
	388	wm8994->supplies[i].supply = wm8958_main_supplies[i];
	389	break;
	390	default:
	391	BUG();
d6c645fc	392	goto err_regmap;
559e0df6 MB	393	}
	394
	395	ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
9e501086 MB	396	wm8994->supplies);
	397	if (ret != 0) {
	398	dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
2fa33494	399	goto err_regmap;
9e501086 MB	400	}
9e501086 MB	401
559e0df6	402	ret = regulator_bulk_enable(wm8994->num_supplies,
9e501086 MB	403	wm8994->supplies);
	404	if (ret != 0) {
	405	dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
7731074a	406	goto err_get;
9e501086 MB	407	}
	408
	409	ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
	410	if (ret < 0) {
	411	dev_err(wm8994->dev, "Failed to read ID register\n");
	412	goto err_enable;
	413	}
559e0df6	414	switch (ret) {
b1f43bf3 MB	415	case 0x1811:
	416	devname = "WM1811";
	417	if (wm8994->type != WM1811)
	418	dev_warn(wm8994->dev, "Device registered as type %d\n",
	419	wm8994->type);
	420	wm8994->type = WM1811;
	421	break;
559e0df6 MB	422	case 0x8994:
	423	devname = "WM8994";
	424	if (wm8994->type != WM8994)
	425	dev_warn(wm8994->dev, "Device registered as type %d\n",
	426	wm8994->type);
	427	wm8994->type = WM8994;
	428	break;
	429	case 0x8958:
	430	devname = "WM8958";
	431	if (wm8994->type != WM8958)
	432	dev_warn(wm8994->dev, "Device registered as type %d\n",
	433	wm8994->type);
	434	wm8994->type = WM8958;
	435	break;
	436	default:
9e501086 MB	437	dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
	438	ret);
	439	ret = -EINVAL;
	440	goto err_enable;
	441	}
	442
	443	ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
	444	if (ret < 0) {
	445	dev_err(wm8994->dev, "Failed to read revision register: %d\n",
	446	ret);
	447	goto err_enable;
	448	}
7ed5849c	449	wm8994->revision = ret;
9e501086	450
a2495bc7 MB	451	switch (wm8994->type) {
a2495bc7 MB	452	case WM8994:
7ed5849c	453	switch (wm8994->revision) {
a2495bc7 MB	454	case 0:
a2495bc7 MB	455	case 1:
559e0df6 MB	456	dev_warn(wm8994->dev,
559e0df6 MB	457	"revision %c not fully supported\n",
7ed5849c	458	'A' + wm8994->revision);
a2495bc7 MB	459	break;
	460	default:
	461	break;
	462	}
9e501086	463	break;
443e67ed MB	464	case WM1811:
443e67ed MB	465	/* Revision C did not change the relevant layer */
7ed5849c MB	466	if (wm8994->revision > 1)
7ed5849c MB	467	wm8994->revision++;
443e67ed	468	break;
9e501086	469	default:
9e501086 MB	470	break;
	471	}
	472
7ed5849c MB	473	dev_info(wm8994->dev, "%s revision %c\n", devname,
7ed5849c MB	474	'A' + wm8994->revision);
9e501086	475
34697898 MB	476	switch (wm8994->type) {
	477	case WM1811:
	478	regmap_config = &wm1811_regmap_config;
	479	break;
	480	case WM8994:
	481	regmap_config = &wm8994_regmap_config;
	482	break;
	483	case WM8958:
	484	regmap_config = &wm8958_regmap_config;
	485	break;
	486	default:
	487	dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
	488	return -EINVAL;
	489	}
	490
	491	ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
	492	if (ret != 0) {
	493	dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
	494	ret);
	495	return ret;
	496	}
	497
9e501086	498	if (pdata) {
c9fbf7e0	499	wm8994->irq_base = pdata->irq_base;
9e501086 MB	500	wm8994->gpio_base = pdata->gpio_base;
	501
	502	/* GPIO configuration is only applied if it's non-zero */
	503	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
	504	if (pdata->gpio_defaults[i]) {
	505	wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
	506	0xffff,
	507	pdata->gpio_defaults[i]);
	508	}
	509	}
881de670 MB	510
881de670 MB	511	wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;
26c34c25 MB	512
	513	if (pdata->spkmode_pu)
	514	pulls \|= WM8994_SPKMODE_PU;
9e501086 MB	515	}
9e501086 MB	516
26c34c25	517	/* Disable unneeded pulls */
881de670	518	wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
26c34c25 MB	519	WM8994_LDO1ENA_PD \| WM8994_LDO2ENA_PD \|
	520	WM8994_SPKMODE_PU \| WM8994_CSNADDR_PD,
	521	pulls);
881de670	522
9e501086 MB	523	/* In some system designs where the regulators are not in use,
	524	* we can achieve a small reduction in leakage currents by
	525	* floating LDO outputs. This bit makes no difference if the
	526	* LDOs are enabled, it only affects cases where the LDOs were
	527	* in operation and are then disabled.
	528	*/
	529	for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
	530	if (wm8994_ldo_in_use(pdata, i))
	531	wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
	532	WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
	533	else
	534	wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
	535	WM8994_LDO1_DISCH, 0);
	536	}
	537
c9fbf7e0 MB	538	wm8994_irq_init(wm8994);
c9fbf7e0 MB	539
9e501086 MB	540	ret = mfd_add_devices(wm8994->dev, -1,
	541	wm8994_devs, ARRAY_SIZE(wm8994_devs),
	542	NULL, 0);
	543	if (ret != 0) {
	544	dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
c9fbf7e0	545	goto err_irq;
9e501086 MB	546	}
9e501086 MB	547
d450f19e MB	548	pm_runtime_enable(wm8994->dev);
	549	pm_runtime_resume(wm8994->dev);
	550
9e501086 MB	551	return 0;
9e501086 MB	552
c9fbf7e0 MB	553	err_irq:
c9fbf7e0 MB	554	wm8994_irq_exit(wm8994);
9e501086	555	err_enable:
559e0df6	556	regulator_bulk_disable(wm8994->num_supplies,
9e501086 MB	557	wm8994->supplies);
9e501086 MB	558	err_get:
559e0df6	559	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
d6c645fc MB	560	err_regmap:
d6c645fc MB	561	regmap_exit(wm8994->regmap);
9e501086	562	mfd_remove_devices(wm8994->dev);
9e501086 MB	563	return ret;
	564	}
	565
	566	static void wm8994_device_exit(struct wm8994 *wm8994)
	567	{
d450f19e	568	pm_runtime_disable(wm8994->dev);
9e501086	569	mfd_remove_devices(wm8994->dev);
c9fbf7e0	570	wm8994_irq_exit(wm8994);
559e0df6	571	regulator_bulk_disable(wm8994->num_supplies,
9e501086	572	wm8994->supplies);
559e0df6	573	regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
d6c645fc	574	regmap_exit(wm8994->regmap);
9e501086 MB	575	}
9e501086 MB	576
cf763c2e MB	577	static const struct of_device_id wm8994_of_match[] = {
	578	{ .compatible = "wlf,wm1811", },
	579	{ .compatible = "wlf,wm8994", },
	580	{ .compatible = "wlf,wm8958", },
	581	{ }
	582	};
	583	MODULE_DEVICE_TABLE(of, wm8994_of_match);
	584
9e501086 MB	585	static int wm8994_i2c_probe(struct i2c_client *i2c,
	586	const struct i2c_device_id *id)
	587	{
	588	struct wm8994 *wm8994;
d6c645fc	589	int ret;
9e501086	590
2fa33494	591	wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
d0a11693	592	if (wm8994 == NULL)
9e501086	593	return -ENOMEM;
9e501086 MB	594
	595	i2c_set_clientdata(i2c, wm8994);
	596	wm8994->dev = &i2c->dev;
c9fbf7e0	597	wm8994->irq = i2c->irq;
559e0df6	598	wm8994->type = id->driver_data;
9e501086	599
34697898	600	wm8994->regmap = regmap_init_i2c(i2c, &wm8994_base_regmap_config);
d6c645fc MB	601	if (IS_ERR(wm8994->regmap)) {
	602	ret = PTR_ERR(wm8994->regmap);
	603	dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
	604	ret);
d6c645fc MB	605	return ret;
	606	}
	607
559e0df6	608	return wm8994_device_init(wm8994, i2c->irq);
9e501086 MB	609	}
	610
	611	static int wm8994_i2c_remove(struct i2c_client *i2c)
	612	{
	613	struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
	614
	615	wm8994_device_exit(wm8994);
	616
	617	return 0;
	618	}
	619
9e501086	620	static const struct i2c_device_id wm8994_i2c_id[] = {
b1f43bf3	621	{ "wm1811", WM1811 },
71d17184	622	{ "wm1811a", WM1811 },
559e0df6 MB	623	{ "wm8994", WM8994 },
559e0df6 MB	624	{ "wm8958", WM8958 },
9e501086 MB	625	{ }
	626	};
	627	MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
	628
aad34310 MB	629	static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume,
aad34310 MB	630	NULL);
d450f19e	631
9e501086 MB	632	static struct i2c_driver wm8994_i2c_driver = {
9e501086 MB	633	.driver = {
d450f19e MB	634	.name = "wm8994",
	635	.owner = THIS_MODULE,
	636	.pm = &wm8994_pm_ops,
cf763c2e	637	.of_match_table = wm8994_of_match,
9e501086 MB	638	},
	639	.probe = wm8994_i2c_probe,
	640	.remove = wm8994_i2c_remove,
9e501086 MB	641	.id_table = wm8994_i2c_id,
	642	};
	643
	644	static int __init wm8994_i2c_init(void)
	645	{
	646	int ret;
	647
	648	ret = i2c_add_driver(&wm8994_i2c_driver);
	649	if (ret != 0)
	650	pr_err("Failed to register wm8994 I2C driver: %d\n", ret);
	651
	652	return ret;
	653	}
	654	module_init(wm8994_i2c_init);
	655
	656	static void __exit wm8994_i2c_exit(void)
	657	{
	658	i2c_del_driver(&wm8994_i2c_driver);
	659	}
	660	module_exit(wm8994_i2c_exit);
	661
	662	MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
	663	MODULE_LICENSE("GPL");
	664	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");