[deliverable/linux.git] / drivers / mfd / da903x.c

/*
 * Base driver for Dialog Semiconductor DA9030/DA9034
 *
 * Copyright (C) 2008 Compulab, Ltd.
 * 	Mike Rapoport <mike@compulab.co.il>
 *
 * Copyright (C) 2006-2008 Marvell International Ltd.
 * 	Eric Miao <eric.miao@marvell.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.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/mfd/da903x.h>

#define DA9030_CHIP_ID		0x00
#define DA9030_EVENT_A		0x01
#define DA9030_EVENT_B		0x02
#define DA9030_EVENT_C		0x03
#define DA9030_STATUS		0x04
#define DA9030_IRQ_MASK_A	0x05
#define DA9030_IRQ_MASK_B	0x06
#define DA9030_IRQ_MASK_C	0x07
#define DA9030_SYS_CTRL_A	0x08
#define DA9030_SYS_CTRL_B	0x09
#define DA9030_FAULT_LOG	0x0a

#define DA9034_CHIP_ID		0x00
#define DA9034_EVENT_A		0x01
#define DA9034_EVENT_B		0x02
#define DA9034_EVENT_C		0x03
#define DA9034_EVENT_D		0x04
#define DA9034_STATUS_A		0x05
#define DA9034_STATUS_B		0x06
#define DA9034_IRQ_MASK_A	0x07
#define DA9034_IRQ_MASK_B	0x08
#define DA9034_IRQ_MASK_C	0x09
#define DA9034_IRQ_MASK_D	0x0a
#define DA9034_SYS_CTRL_A	0x0b
#define DA9034_SYS_CTRL_B	0x0c
#define DA9034_FAULT_LOG	0x0d

struct da903x_chip;

struct da903x_chip_ops {
	int	(*init_chip)(struct da903x_chip *);
	int	(*unmask_events)(struct da903x_chip *, unsigned int events);
	int	(*mask_events)(struct da903x_chip *, unsigned int events);
	int	(*read_events)(struct da903x_chip *, unsigned int *events);
	int	(*read_status)(struct da903x_chip *, unsigned int *status);
};

struct da903x_chip {
	struct i2c_client	*client;
	struct device		*dev;
	struct da903x_chip_ops	*ops;

	int			type;
	uint32_t		events_mask;

	struct mutex		lock;
	struct work_struct	irq_work;

	struct blocking_notifier_head notifier_list;
};

static inline int __da903x_read(struct i2c_client *client,
				int reg, uint8_t *val)
{
	int ret;

	ret = i2c_smbus_read_byte_data(client, reg);
	if (ret < 0) {
		dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
		return ret;
	}

	*val = (uint8_t)ret;
	return 0;
}

static inline int __da903x_reads(struct i2c_client *client, int reg,
				 int len, uint8_t *val)
{
	int ret;

	ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
		return ret;
	}
	return 0;
}

static inline int __da903x_write(struct i2c_client *client,
				 int reg, uint8_t val)
{
	int ret;

	ret = i2c_smbus_write_byte_data(client, reg, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
				val, reg);
		return ret;
	}
	return 0;
}

static inline int __da903x_writes(struct i2c_client *client, int reg,
				  int len, uint8_t *val)
{
	int ret;

	ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
	if (ret < 0) {
		dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
		return ret;
	}
	return 0;
}

int da903x_register_notifier(struct device *dev, struct notifier_block *nb,
				unsigned int events)
{
	struct da903x_chip *chip = dev_get_drvdata(dev);

	chip->ops->unmask_events(chip, events);
	return blocking_notifier_chain_register(&chip->notifier_list, nb);
}
EXPORT_SYMBOL_GPL(da903x_register_notifier);

int da903x_unregister_notifier(struct device *dev, struct notifier_block *nb,
				unsigned int events)
{
	struct da903x_chip *chip = dev_get_drvdata(dev);

	chip->ops->mask_events(chip, events);
	return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
}
EXPORT_SYMBOL_GPL(da903x_unregister_notifier);

int da903x_write(struct device *dev, int reg, uint8_t val)
{
	return __da903x_write(to_i2c_client(dev), reg, val);
}
EXPORT_SYMBOL_GPL(da903x_write);

int da903x_read(struct device *dev, int reg, uint8_t *val)
{
	return __da903x_read(to_i2c_client(dev), reg, val);
}
EXPORT_SYMBOL_GPL(da903x_read);

int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
{
	struct da903x_chip *chip = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&chip->lock);

	ret = __da903x_read(chip->client, reg, &reg_val);
	if (ret)
		goto out;

	if ((reg_val & bit_mask) == 0) {
		reg_val |= bit_mask;
		ret = __da903x_write(chip->client, reg, reg_val);
	}
out:
	mutex_unlock(&chip->lock);
	return ret;
}
EXPORT_SYMBOL_GPL(da903x_set_bits);

int da903x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
{
	struct da903x_chip *chip = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&chip->lock);

	ret = __da903x_read(chip->client, reg, &reg_val);
	if (ret)
		goto out;

	if (reg_val & bit_mask) {
		reg_val &= ~bit_mask;
		ret = __da903x_write(chip->client, reg, reg_val);
	}
out:
	mutex_unlock(&chip->lock);
	return ret;
}
EXPORT_SYMBOL_GPL(da903x_clr_bits);

int da903x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
{
	struct da903x_chip *chip = dev_get_drvdata(dev);
	uint8_t reg_val;
	int ret = 0;

	mutex_lock(&chip->lock);

	ret = __da903x_read(chip->client, reg, &reg_val);
	if (ret)
		goto out;

	if ((reg_val & mask) != val) {
		reg_val = (reg_val & ~mask) | val;
		ret = __da903x_write(chip->client, reg, reg_val);
	}
out:
	mutex_unlock(&chip->lock);
	return ret;
}
EXPORT_SYMBOL_GPL(da903x_update);

int da903x_query_status(struct device *dev, unsigned int sbits)
{
	struct da903x_chip *chip = dev_get_drvdata(dev);
	unsigned int status = 0;

	chip->ops->read_status(chip, &status);
	return ((status & sbits) == sbits);
}
EXPORT_SYMBOL(da903x_query_status);

static int __devinit da9030_init_chip(struct da903x_chip *chip)
{
	uint8_t chip_id;
	int err;

	err = __da903x_read(chip->client, DA9030_CHIP_ID, &chip_id);
	if (err)
		return err;

	err = __da903x_write(chip->client, DA9030_SYS_CTRL_A, 0xE8);
	if (err)
		return err;

	dev_info(chip->dev, "DA9030 (CHIP ID: 0x%02x) detected\n", chip_id);
	return 0;
}

static int da9030_unmask_events(struct da903x_chip *chip, unsigned int events)
{
	uint8_t v[3];

	chip->events_mask &= ~events;

	v[0] = (chip->events_mask & 0xff);
	v[1] = (chip->events_mask >> 8) & 0xff;
	v[2] = (chip->events_mask >> 16) & 0xff;

	return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
}

static int da9030_mask_events(struct da903x_chip *chip, unsigned int events)
{
	uint8_t v[3];

	chip->events_mask &= ~events;

	v[0] = (chip->events_mask & 0xff);
	v[1] = (chip->events_mask >> 8) & 0xff;
	v[2] = (chip->events_mask >> 16) & 0xff;

	return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
}

static int da9030_read_events(struct da903x_chip *chip, unsigned int *events)
{
	uint8_t v[3] = {0, 0, 0};
	int ret;

	ret = __da903x_reads(chip->client, DA9030_EVENT_A, 3, v);
	if (ret < 0)
		return ret;

	*events = (v[2] << 16) | (v[1] << 8) | v[0];
	return 0;
}

static int da9030_read_status(struct da903x_chip *chip, unsigned int *status)
{
	return __da903x_read(chip->client, DA9030_STATUS, (uint8_t *)status);
}

static int da9034_init_chip(struct da903x_chip *chip)
{
	uint8_t chip_id;
	int err;

	err = __da903x_read(chip->client, DA9034_CHIP_ID, &chip_id);
	if (err)
		return err;

	err = __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0xE8);
	if (err)
		return err;

	/* avoid SRAM power off during sleep*/
	__da903x_write(chip->client, 0x10, 0x07);
	__da903x_write(chip->client, 0x11, 0xff);
	__da903x_write(chip->client, 0x12, 0xff);

	/* Enable the ONKEY power down functionality */
	__da903x_write(chip->client, DA9034_SYS_CTRL_B, 0x20);
	__da903x_write(chip->client, DA9034_SYS_CTRL_A, 0x60);

	/* workaround to make LEDs work */
	__da903x_write(chip->client, 0x90, 0x01);
	__da903x_write(chip->client, 0xB0, 0x08);

	/* make ADTV1 and SDTV1 effective */
	__da903x_write(chip->client, 0x20, 0x00);

	dev_info(chip->dev, "DA9034 (CHIP ID: 0x%02x) detected\n", chip_id);
	return 0;
}

static int da9034_unmask_events(struct da903x_chip *chip, unsigned int events)
{
	uint8_t v[4];

	chip->events_mask &= ~events;

	v[0] = (chip->events_mask & 0xff);
	v[1] = (chip->events_mask >> 8) & 0xff;
	v[2] = (chip->events_mask >> 16) & 0xff;
	v[3] = (chip->events_mask >> 24) & 0xff;

	return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
}

static int da9034_mask_events(struct da903x_chip *chip, unsigned int events)
{
	uint8_t v[4];

	chip->events_mask |= events;

	v[0] = (chip->events_mask & 0xff);
	v[1] = (chip->events_mask >> 8) & 0xff;
	v[2] = (chip->events_mask >> 16) & 0xff;
	v[3] = (chip->events_mask >> 24) & 0xff;

	return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
}

static int da9034_read_events(struct da903x_chip *chip, unsigned int *events)
{
	uint8_t v[4] = {0, 0, 0, 0};
	int ret;

	ret = __da903x_reads(chip->client, DA9034_EVENT_A, 4, v);
	if (ret < 0)
		return ret;

	*events = (v[3] << 24) | (v[2] << 16) | (v[1] << 8) | v[0];
	return 0;
}

static int da9034_read_status(struct da903x_chip *chip, unsigned int *status)
{
	uint8_t v[2] = {0, 0};
	int ret = 0;

	ret = __da903x_reads(chip->client, DA9034_STATUS_A, 2, v);
	if (ret)
		return ret;

	*status = (v[1] << 8) | v[0];
	return 0;
}

static void da903x_irq_work(struct work_struct *work)
{
	struct da903x_chip *chip =
		container_of(work, struct da903x_chip, irq_work);
	unsigned int events = 0;

	while (1) {
		if (chip->ops->read_events(chip, &events))
			break;

		events &= ~chip->events_mask;
		if (events == 0)
			break;

		blocking_notifier_call_chain(
				&chip->notifier_list, events, NULL);
	}
	enable_irq(chip->client->irq);
}

static int da903x_irq_handler(int irq, void *data)
{
	struct da903x_chip *chip = data;

	disable_irq_nosync(irq);
	(void)schedule_work(&chip->irq_work);

	return IRQ_HANDLED;
}

static struct da903x_chip_ops da903x_ops[] = {
	[0] = {
		.init_chip	= da9030_init_chip,
		.unmask_events	= da9030_unmask_events,
		.mask_events	= da9030_mask_events,
		.read_events	= da9030_read_events,
		.read_status	= da9030_read_status,
	},
	[1] = {
		.init_chip	= da9034_init_chip,
		.unmask_events	= da9034_unmask_events,
		.mask_events	= da9034_mask_events,
		.read_events	= da9034_read_events,
		.read_status	= da9034_read_status,
	}
};

static const struct i2c_device_id da903x_id_table[] = {
	{ "da9030", 0 },
	{ "da9034", 1 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, da903x_id_table);

static int __devexit __remove_subdev(struct device *dev, void *unused)
{
	platform_device_unregister(to_platform_device(dev));
	return 0;
}

static int __devexit da903x_remove_subdevs(struct da903x_chip *chip)
{
	return device_for_each_child(chip->dev, NULL, __remove_subdev);
}

static int __devinit da903x_add_subdevs(struct da903x_chip *chip,
					struct da903x_platform_data *pdata)
{
	struct da903x_subdev_info *subdev;
	struct platform_device *pdev;
	int i, ret = 0;

	for (i = 0; i < pdata->num_subdevs; i++) {
		subdev = &pdata->subdevs[i];

		pdev = platform_device_alloc(subdev->name, subdev->id);

		pdev->dev.parent = chip->dev;
		pdev->dev.platform_data = subdev->platform_data;

		ret = platform_device_add(pdev);
		if (ret)
			goto failed;
	}
	return 0;

failed:
	da903x_remove_subdevs(chip);
	return ret;
}

static int __devinit da903x_probe(struct i2c_client *client,
				  const struct i2c_device_id *id)
{
	struct da903x_platform_data *pdata = client->dev.platform_data;
	struct da903x_chip *chip;
	unsigned int tmp;
	int ret;

	chip = kzalloc(sizeof(struct da903x_chip), GFP_KERNEL);
	if (chip == NULL)
		return -ENOMEM;

	chip->client = client;
	chip->dev = &client->dev;
	chip->ops = &da903x_ops[id->driver_data];

	mutex_init(&chip->lock);
	INIT_WORK(&chip->irq_work, da903x_irq_work);
	BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);

	i2c_set_clientdata(client, chip);

	ret = chip->ops->init_chip(chip);
	if (ret)
		goto out_free_chip;

	/* mask and clear all IRQs */
	chip->events_mask = 0xffffffff;
	chip->ops->mask_events(chip, chip->events_mask);
	chip->ops->read_events(chip, &tmp);

	ret = request_irq(client->irq, da903x_irq_handler,
			IRQF_DISABLED | IRQF_TRIGGER_FALLING,
			"da903x", chip);
	if (ret) {
		dev_err(&client->dev, "failed to request irq %d\n",
				client->irq);
		goto out_free_chip;
	}

	ret = da903x_add_subdevs(chip, pdata);
	if (ret)
		goto out_free_irq;

	return 0;

out_free_irq:
	free_irq(client->irq, chip);
out_free_chip:
	i2c_set_clientdata(client, NULL);
	kfree(chip);
	return ret;
}

static int __devexit da903x_remove(struct i2c_client *client)
{
	struct da903x_chip *chip = i2c_get_clientdata(client);

	da903x_remove_subdevs(chip);
	kfree(chip);
	return 0;
}

static struct i2c_driver da903x_driver = {
	.driver	= {
		.name	= "da903x",
		.owner	= THIS_MODULE,
	},
	.probe		= da903x_probe,
	.remove		= __devexit_p(da903x_remove),
	.id_table	= da903x_id_table,
};

static int __init da903x_init(void)
{
	return i2c_add_driver(&da903x_driver);
}
module_init(da903x_init);

static void __exit da903x_exit(void)
{
	i2c_del_driver(&da903x_driver);
}
module_exit(da903x_exit);

MODULE_DESCRIPTION("PMIC Driver for Dialog Semiconductor DA9034");
MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
	      "Mike Rapoport <mike@compulab.co.il>");
MODULE_LICENSE("GPL");
Commit	Line	Data
26b8f5e1 EM	1	/*
	2	* Base driver for Dialog Semiconductor DA9030/DA9034
	3	*
	4	* Copyright (C) 2008 Compulab, Ltd.
	5	* Mike Rapoport <mike@compulab.co.il>
	6	*
	7	* Copyright (C) 2006-2008 Marvell International Ltd.
	8	* Eric Miao <eric.miao@marvell.com>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
	15	#include <linux/kernel.h>
	16	#include <linux/module.h>
	17	#include <linux/interrupt.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/i2c.h>
	20	#include <linux/mfd/da903x.h>
	21
	22	#define DA9030_CHIP_ID 0x00
	23	#define DA9030_EVENT_A 0x01
	24	#define DA9030_EVENT_B 0x02
	25	#define DA9030_EVENT_C 0x03
	26	#define DA9030_STATUS 0x04
	27	#define DA9030_IRQ_MASK_A 0x05
	28	#define DA9030_IRQ_MASK_B 0x06
	29	#define DA9030_IRQ_MASK_C 0x07
	30	#define DA9030_SYS_CTRL_A 0x08
	31	#define DA9030_SYS_CTRL_B 0x09
	32	#define DA9030_FAULT_LOG 0x0a
	33
	34	#define DA9034_CHIP_ID 0x00
	35	#define DA9034_EVENT_A 0x01
	36	#define DA9034_EVENT_B 0x02
	37	#define DA9034_EVENT_C 0x03
	38	#define DA9034_EVENT_D 0x04
	39	#define DA9034_STATUS_A 0x05
	40	#define DA9034_STATUS_B 0x06
	41	#define DA9034_IRQ_MASK_A 0x07
	42	#define DA9034_IRQ_MASK_B 0x08
	43	#define DA9034_IRQ_MASK_C 0x09
	44	#define DA9034_IRQ_MASK_D 0x0a
	45	#define DA9034_SYS_CTRL_A 0x0b
	46	#define DA9034_SYS_CTRL_B 0x0c
	47	#define DA9034_FAULT_LOG 0x0d
	48
	49	struct da903x_chip;
	50
	51	struct da903x_chip_ops {
	52	int (init_chip)(struct da903x_chip );
	53	int (unmask_events)(struct da903x_chip , unsigned int events);
	54	int (mask_events)(struct da903x_chip , unsigned int events);
	55	int (read_events)(struct da903x_chip , unsigned int *events);
	56	int (read_status)(struct da903x_chip , unsigned int *status);
	57	};
	58
	59	struct da903x_chip {
	60	struct i2c_client *client;
	61	struct device *dev;
	62	struct da903x_chip_ops *ops;
	63
	64	int type;
65	uint32_t events_mask;
66
67	struct mutex lock;
68	struct work_struct irq_work;
69
70	struct blocking_notifier_head notifier_list;
71	};
72
73	static inline int __da903x_read(struct i2c_client *client,
74	int reg, uint8_t *val)
75	{
76	int ret;
77
78	ret = i2c_smbus_read_byte_data(client, reg);
79	if (ret < 0) {
80	dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
81	return ret;
82	}
83
84	*val = (uint8_t)ret;
85	return 0;
86	}
87
88	static inline int __da903x_reads(struct i2c_client *client, int reg,
89	int len, uint8_t *val)
90	{
91	int ret;
92
93	ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
94	if (ret < 0) {
95	dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
96	return ret;
97	}
98	return 0;
99	}
100
101	static inline int __da903x_write(struct i2c_client *client,
102	int reg, uint8_t val)
103	{
104	int ret;
105
106	ret = i2c_smbus_write_byte_data(client, reg, val);
107	if (ret < 0) {
108	dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
109	val, reg);
110	return ret;
111	}
112	return 0;
113	}
114
115	static inline int __da903x_writes(struct i2c_client *client, int reg,
116	int len, uint8_t *val)
117	{
118	int ret;
119
120	ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
121	if (ret < 0) {
122	dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
123	return ret;
124	}
125	return 0;
126	}
127
128	int da903x_register_notifier(struct device dev, struct notifier_block nb,
129	unsigned int events)
130	{
131	struct da903x_chip *chip = dev_get_drvdata(dev);
132
133	chip->ops->unmask_events(chip, events);
134	return blocking_notifier_chain_register(&chip->notifier_list, nb);
135	}
136	EXPORT_SYMBOL_GPL(da903x_register_notifier);
137
138	int da903x_unregister_notifier(struct device dev, struct notifier_block nb,
139	unsigned int events)
140	{
141	struct da903x_chip *chip = dev_get_drvdata(dev);
142
143	chip->ops->mask_events(chip, events);
144	return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
145	}
146	EXPORT_SYMBOL_GPL(da903x_unregister_notifier);
147
148	int da903x_write(struct device *dev, int reg, uint8_t val)
149	{
150	return __da903x_write(to_i2c_client(dev), reg, val);
151	}
152	EXPORT_SYMBOL_GPL(da903x_write);
153
154	int da903x_read(struct device dev, int reg, uint8_t val)
155	{
156	return __da903x_read(to_i2c_client(dev), reg, val);
157	}
158	EXPORT_SYMBOL_GPL(da903x_read);
159
160	int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
161	{
162	struct da903x_chip *chip = dev_get_drvdata(dev);
163	uint8_t reg_val;
164	int ret = 0;
165
166	mutex_lock(&chip->lock);
167
168	ret = __da903x_read(chip->client, reg, &reg_val);
169	if (ret)
170	goto out;
171
172	if ((reg_val & bit_mask) == 0) {
173	reg_val \|= bit_mask;
174	ret = __da903x_write(chip->client, reg, reg_val);
175	}
176	out:
177	mutex_unlock(&chip->lock);
178	return ret;
179	}
180	EXPORT_SYMBOL_GPL(da903x_set_bits);
181
182	int da903x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
183	{
184	struct da903x_chip *chip = dev_get_drvdata(dev);
185	uint8_t reg_val;
186	int ret = 0;
187
188	mutex_lock(&chip->lock);
189
190	ret = __da903x_read(chip->client, reg, &reg_val);
191	if (ret)
192	goto out;
193
194	if (reg_val & bit_mask) {
195	reg_val &= ~bit_mask;
196	ret = __da903x_write(chip->client, reg, reg_val);
197	}
198	out:
199	mutex_unlock(&chip->lock);
200	return ret;
201	}
202	EXPORT_SYMBOL_GPL(da903x_clr_bits);
203
204	int da903x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
205	{
206	struct da903x_chip *chip = dev_get_drvdata(dev);
207	uint8_t reg_val;
208	int ret = 0;
209
210	mutex_lock(&chip->lock);
211
212	ret = __da903x_read(chip->client, reg, &reg_val);
213	if (ret)
214	goto out;
215
216	if ((reg_val & mask) != val) {
217	reg_val = (reg_val & ~mask) \| val;
218	ret = __da903x_write(chip->client, reg, reg_val);
219	}
220	out:
221	mutex_unlock(&chip->lock);
222	return ret;
223	}
224	EXPORT_SYMBOL_GPL(da903x_update);
225
226	int da903x_query_status(struct device *dev, unsigned int sbits)
227	{
228	struct da903x_chip *chip = dev_get_drvdata(dev);
229	unsigned int status = 0;
230
231	chip->ops->read_status(chip, &status);
232	return ((status & sbits) == sbits);
233	}
234	EXPORT_SYMBOL(da903x_query_status);
235
236	static int __devinit da9030_init_chip(struct da903x_chip *chip)
237	{
238	uint8_t chip_id;
239	int err;
240
241	err = __da903x_read(chip->client, DA9030_CHIP_ID, &chip_id);
242	if (err)
243	return err;
244
245	err = __da903x_write(chip->client, DA9030_SYS_CTRL_A, 0xE8);
246	if (err)
247	return err;
248
249	dev_info(chip->dev, "DA9030 (CHIP ID: 0x%02x) detected\n", chip_id);
250	return 0;
251	}
252
253	static int da9030_unmask_events(struct da903x_chip *chip, unsigned int events)
254	{
255	uint8_t v[3];
256
257	chip->events_mask &= ~events;
258
259	v[0] = (chip->events_mask & 0xff);
260	v[1] = (chip->events_mask >> 8) & 0xff;
261	v[2] = (chip->events_mask >> 16) & 0xff;
262
263	return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
264	}
265
266	static int da9030_mask_events(struct da903x_chip *chip, unsigned int events)
267	{
268	uint8_t v[3];
269
270	chip->events_mask &= ~events;
271
272	v[0] = (chip->events_mask & 0xff);
273	v[1] = (chip->events_mask >> 8) & 0xff;
274	v[2] = (chip->events_mask >> 16) & 0xff;
275
276	return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
277	}
278
279	static int da9030_read_events(struct da903x_chip chip, unsigned int events)
280	{
281	uint8_t v[3] = {0, 0, 0};
282	int ret;
283
284	ret = __da903x_reads(chip->client, DA9030_EVENT_A, 3, v);
285	if (ret < 0)
286	return ret;
287
288	*events = (v[2] << 16) \| (v[1] << 8) \| v[0];
289	return 0;
290	}
291
292	static int da9030_read_status(struct da903x_chip chip, unsigned int status)
293	{
294	return __da903x_read(chip->client, DA9030_STATUS, (uint8_t *)status);
295	}
296
297	static int da9034_init_chip(struct da903x_chip *chip)
298	{
299	uint8_t chip_id;
300	int err;
301
302	err = __da903x_read(chip->client, DA9034_CHIP_ID, &chip_id);
303	if (err)
304	return err;
305
306	err = __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0xE8);
307	if (err)
308	return err;
309
310	/* avoid SRAM power off during sleep*/
311	__da903x_write(chip->client, 0x10, 0x07);
312	__da903x_write(chip->client, 0x11, 0xff);
313	__da903x_write(chip->client, 0x12, 0xff);
314
315	/* Enable the ONKEY power down functionality */
316	__da903x_write(chip->client, DA9034_SYS_CTRL_B, 0x20);
317	__da903x_write(chip->client, DA9034_SYS_CTRL_A, 0x60);
318
319	/* workaround to make LEDs work */
320	__da903x_write(chip->client, 0x90, 0x01);
321	__da903x_write(chip->client, 0xB0, 0x08);
322
323	/* make ADTV1 and SDTV1 effective */
324	__da903x_write(chip->client, 0x20, 0x00);
325
326	dev_info(chip->dev, "DA9034 (CHIP ID: 0x%02x) detected\n", chip_id);
327	return 0;
328	}
329
330	static int da9034_unmask_events(struct da903x_chip *chip, unsigned int events)
331	{
332	uint8_t v[4];
333
334	chip->events_mask &= ~events;
335
336	v[0] = (chip->events_mask & 0xff);
337	v[1] = (chip->events_mask >> 8) & 0xff;
338	v[2] = (chip->events_mask >> 16) & 0xff;
339	v[3] = (chip->events_mask >> 24) & 0xff;
340
341	return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
342	}
343
344	static int da9034_mask_events(struct da903x_chip *chip, unsigned int events)
345	{
346	uint8_t v[4];
347
348	chip->events_mask \|= events;
349
350	v[0] = (chip->events_mask & 0xff);
351	v[1] = (chip->events_mask >> 8) & 0xff;
352	v[2] = (chip->events_mask >> 16) & 0xff;
353	v[3] = (chip->events_mask >> 24) & 0xff;
354
355	return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
356	}
357
358	static int da9034_read_events(struct da903x_chip chip, unsigned int events)
359	{
360	uint8_t v[4] = {0, 0, 0, 0};
361	int ret;
362
363	ret = __da903x_reads(chip->client, DA9034_EVENT_A, 4, v);
364	if (ret < 0)
365	return ret;
366
367	*events = (v[3] << 24) \| (v[2] << 16) \| (v[1] << 8) \| v[0];
368	return 0;
369	}
370
371	static int da9034_read_status(struct da903x_chip chip, unsigned int status)
372	{
373	uint8_t v[2] = {0, 0};
374	int ret = 0;
375
376	ret = __da903x_reads(chip->client, DA9034_STATUS_A, 2, v);
377	if (ret)
378	return ret;
379
380	*status = (v[1] << 8) \| v[0];
381	return 0;
382	}
383
384	static void da903x_irq_work(struct work_struct *work)
385	{
386	struct da903x_chip *chip =
387	container_of(work, struct da903x_chip, irq_work);
388	unsigned int events = 0;
389
390	while (1) {
391	if (chip->ops->read_events(chip, &events))
392	break;
393
394	events &= ~chip->events_mask;
395	if (events == 0)
396	break;
397
398	blocking_notifier_call_chain(
399	&chip->notifier_list, events, NULL);
400	}
401	enable_irq(chip->client->irq);
402	}
403
404	static int da903x_irq_handler(int irq, void *data)
405	{
406	struct da903x_chip *chip = data;
407
408	disable_irq_nosync(irq);
409	(void)schedule_work(&chip->irq_work);
410
411	return IRQ_HANDLED;
412	}
413
414	static struct da903x_chip_ops da903x_ops[] = {
415	[0] = {
416	.init_chip = da9030_init_chip,
417	.unmask_events = da9030_unmask_events,
418	.mask_events = da9030_mask_events,
419	.read_events = da9030_read_events,
420	.read_status = da9030_read_status,
421	},
422	[1] = {
423	.init_chip = da9034_init_chip,
424	.unmask_events = da9034_unmask_events,
425	.mask_events = da9034_mask_events,
426	.read_events = da9034_read_events,
427	.read_status = da9034_read_status,
428	}
429	};
430
431	static const struct i2c_device_id da903x_id_table[] = {
432	{ "da9030", 0 },
433	{ "da9034", 1 },
434	{ },
435	};
436	MODULE_DEVICE_TABLE(i2c, da903x_id_table);
437
438	static int __devexit __remove_subdev(struct device dev, void unused)
439	{
440	platform_device_unregister(to_platform_device(dev));
441	return 0;
442	}
443
444	static int __devexit da903x_remove_subdevs(struct da903x_chip *chip)
445	{
446	return device_for_each_child(chip->dev, NULL, __remove_subdev);
447	}
448
449	static int __devinit da903x_add_subdevs(struct da903x_chip *chip,
450	struct da903x_platform_data *pdata)
451	{
452	struct da903x_subdev_info *subdev;
453	struct platform_device *pdev;
454	int i, ret = 0;
455
456	for (i = 0; i < pdata->num_subdevs; i++) {
457	subdev = &pdata->subdevs[i];
458
459	pdev = platform_device_alloc(subdev->name, subdev->id);
460
461	pdev->dev.parent = chip->dev;
462	pdev->dev.platform_data = subdev->platform_data;
463
464	ret = platform_device_add(pdev);
465	if (ret)
466	goto failed;
467	}
468	return 0;
469
470	failed:
471	da903x_remove_subdevs(chip);
472	return ret;
473	}
474
475	static int __devinit da903x_probe(struct i2c_client *client,
476	const struct i2c_device_id *id)
477	{
478	struct da903x_platform_data *pdata = client->dev.platform_data;
479	struct da903x_chip *chip;
480	unsigned int tmp;
481	int ret;
482
483	chip = kzalloc(sizeof(struct da903x_chip), GFP_KERNEL);
484	if (chip == NULL)
485	return -ENOMEM;
486
487	chip->client = client;
488	chip->dev = &client->dev;
489	chip->ops = &da903x_ops[id->driver_data];
490
491	mutex_init(&chip->lock);
492	INIT_WORK(&chip->irq_work, da903x_irq_work);
493	BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);
494
495	i2c_set_clientdata(client, chip);
496
497	ret = chip->ops->init_chip(chip);
498	if (ret)
499	goto out_free_chip;
500
501	/* mask and clear all IRQs */
502	chip->events_mask = 0xffffffff;
503	chip->ops->mask_events(chip, chip->events_mask);
504	chip->ops->read_events(chip, &tmp);
505
506	ret = request_irq(client->irq, da903x_irq_handler,
507	IRQF_DISABLED \| IRQF_TRIGGER_FALLING,
508	"da903x", chip);
509	if (ret) {
510	dev_err(&client->dev, "failed to request irq %d\n",
511	client->irq);
512	goto out_free_chip;
513	}
514
515	ret = da903x_add_subdevs(chip, pdata);
516	if (ret)
517	goto out_free_irq;
518
519	return 0;
520
521	out_free_irq:
522	free_irq(client->irq, chip);
523	out_free_chip:
524	i2c_set_clientdata(client, NULL);
525	kfree(chip);
526	return ret;
527	}
528
529	static int __devexit da903x_remove(struct i2c_client *client)
530	{
531	struct da903x_chip *chip = i2c_get_clientdata(client);
532
533	da903x_remove_subdevs(chip);
534	kfree(chip);
535	return 0;
536	}
537
538	static struct i2c_driver da903x_driver = {
539	.driver = {
540	.name = "da903x",
541	.owner = THIS_MODULE,
542	},
543	.probe = da903x_probe,
544	.remove = __devexit_p(da903x_remove),
545	.id_table = da903x_id_table,
546	};
547
548	static int __init da903x_init(void)
549	{
550	return i2c_add_driver(&da903x_driver);
551	}
552	module_init(da903x_init);
553
554	static void __exit da903x_exit(void)
555	{
556	i2c_del_driver(&da903x_driver);
557	}
558	module_exit(da903x_exit);
559
560	MODULE_DESCRIPTION("PMIC Driver for Dialog Semiconductor DA9034");
561	MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
562	"Mike Rapoport <mike@compulab.co.il>");
563	MODULE_LICENSE("GPL");