[linux-2.6-block.git] / drivers / mfd / 88pm8607.c

/*
 * Base driver for Marvell 88PM8607
 *
 * Copyright (C) 2009 Marvell International Ltd.
 * 	Haojian Zhuang <haojian.zhuang@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/core.h>
#include <linux/mfd/88pm8607.h>


#define PM8607_REG_RESOURCE(_start, _end)		\
{							\
	.start	= PM8607_##_start,			\
	.end	= PM8607_##_end,			\
	.flags	= IORESOURCE_IO,			\
}

static struct resource pm8607_regulator_resources[] = {
	PM8607_REG_RESOURCE(BUCK1, BUCK1),
	PM8607_REG_RESOURCE(BUCK2, BUCK2),
	PM8607_REG_RESOURCE(BUCK3, BUCK3),
	PM8607_REG_RESOURCE(LDO1,  LDO1),
	PM8607_REG_RESOURCE(LDO2,  LDO2),
	PM8607_REG_RESOURCE(LDO3,  LDO3),
	PM8607_REG_RESOURCE(LDO4,  LDO4),
	PM8607_REG_RESOURCE(LDO5,  LDO5),
	PM8607_REG_RESOURCE(LDO6,  LDO6),
	PM8607_REG_RESOURCE(LDO7,  LDO7),
	PM8607_REG_RESOURCE(LDO8,  LDO8),
	PM8607_REG_RESOURCE(LDO9,  LDO9),
	PM8607_REG_RESOURCE(LDO10, LDO10),
	PM8607_REG_RESOURCE(LDO12, LDO12),
	PM8607_REG_RESOURCE(LDO14, LDO14),
};

#define PM8607_REG_DEVS(_name, _id)					\
{									\
	.name		= "88pm8607-" #_name,				\
	.num_resources	= 1,						\
	.resources	= &pm8607_regulator_resources[PM8607_ID_##_id],	\
}

static struct mfd_cell pm8607_devs[] = {
	PM8607_REG_DEVS(buck1, BUCK1),
	PM8607_REG_DEVS(buck2, BUCK2),
	PM8607_REG_DEVS(buck3, BUCK3),
	PM8607_REG_DEVS(ldo1,  LDO1),
	PM8607_REG_DEVS(ldo2,  LDO2),
	PM8607_REG_DEVS(ldo3,  LDO3),
	PM8607_REG_DEVS(ldo4,  LDO4),
	PM8607_REG_DEVS(ldo5,  LDO5),
	PM8607_REG_DEVS(ldo6,  LDO6),
	PM8607_REG_DEVS(ldo7,  LDO7),
	PM8607_REG_DEVS(ldo8,  LDO8),
	PM8607_REG_DEVS(ldo9,  LDO9),
	PM8607_REG_DEVS(ldo10, LDO10),
	PM8607_REG_DEVS(ldo12, LDO12),
	PM8607_REG_DEVS(ldo14, LDO14),
};

static inline int pm8607_read_device(struct pm8607_chip *chip,
				     int reg, int bytes, void *dest)
{
	struct i2c_client *i2c = chip->client;
	unsigned char data;
	int ret;

	data = (unsigned char)reg;
	ret = i2c_master_send(i2c, &data, 1);
	if (ret < 0)
		return ret;

	ret = i2c_master_recv(i2c, dest, bytes);
	if (ret < 0)
		return ret;
	return 0;
}

static inline int pm8607_write_device(struct pm8607_chip *chip,
				      int reg, int bytes, void *src)
{
	struct i2c_client *i2c = chip->client;
	unsigned char buf[bytes + 1];
	int ret;

	buf[0] = (unsigned char)reg;
	memcpy(&buf[1], src, bytes);

	ret = i2c_master_send(i2c, buf, bytes + 1);
	if (ret < 0)
		return ret;
	return 0;
}

int pm8607_reg_read(struct pm8607_chip *chip, int reg)
{
	unsigned char data;
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, 1, &data);
	mutex_unlock(&chip->io_lock);

	if (ret < 0)
		return ret;
	else
		return (int)data;
}
EXPORT_SYMBOL(pm8607_reg_read);

int pm8607_reg_write(struct pm8607_chip *chip, int reg,
		     unsigned char data)
{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->write(chip, reg, 1, &data);
	mutex_unlock(&chip->io_lock);

	return ret;
}
EXPORT_SYMBOL(pm8607_reg_write);

int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
		     int count, unsigned char *buf)
{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, count, buf);
	mutex_unlock(&chip->io_lock);

	return ret;
}
EXPORT_SYMBOL(pm8607_bulk_read);

int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
		      int count, unsigned char *buf)
{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->write(chip, reg, count, buf);
	mutex_unlock(&chip->io_lock);

	return ret;
}
EXPORT_SYMBOL(pm8607_bulk_write);

int pm8607_set_bits(struct pm8607_chip *chip, int reg,
		    unsigned char mask, unsigned char data)
{
	unsigned char value;
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, 1, &value);
	if (ret < 0)
		goto out;
	value &= ~mask;
	value |= data;
	ret = chip->write(chip, reg, 1, &value);
out:
	mutex_unlock(&chip->io_lock);
	return ret;
}
EXPORT_SYMBOL(pm8607_set_bits);


static const struct i2c_device_id pm8607_id_table[] = {
	{ "88PM8607", 0 },
	{}
};
MODULE_DEVICE_TABLE(i2c, pm8607_id_table);


static int __devinit pm8607_probe(struct i2c_client *client,
				  const struct i2c_device_id *id)
{
	struct pm8607_platform_data *pdata = client->dev.platform_data;
	struct pm8607_chip *chip;
	int i, count;
	int ret;

	chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
	if (chip == NULL)
		return -ENOMEM;

	chip->client = client;
	chip->dev = &client->dev;
	chip->read = pm8607_read_device;
	chip->write = pm8607_write_device;
	i2c_set_clientdata(client, chip);

	mutex_init(&chip->io_lock);
	dev_set_drvdata(chip->dev, chip);

	ret = pm8607_reg_read(chip, PM8607_CHIP_ID);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
		goto out;
	}
	if ((ret & CHIP_ID_MASK) == CHIP_ID)
		dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
			 ret);
	else {
		dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
			"Chip ID: %02x\n", ret);
		goto out;
	}
	chip->chip_id = ret;

	ret = pm8607_reg_read(chip, PM8607_BUCK3);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
		goto out;
	}
	if (ret & PM8607_BUCK3_DOUBLE)
		chip->buck3_double = 1;

	ret = pm8607_reg_read(chip, PM8607_MISC1);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
		goto out;
	}
	if (pdata->i2c_port == PI2C_PORT)
		ret |= PM8607_MISC1_PI2C;
	else
		ret &= ~PM8607_MISC1_PI2C;
	ret = pm8607_reg_write(chip, PM8607_MISC1, ret);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to write MISC1 register: %d\n", ret);
		goto out;
	}


	count = ARRAY_SIZE(pm8607_devs);
	for (i = 0; i < count; i++) {
		ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
				      1, NULL, 0);
		if (ret != 0) {
			dev_err(chip->dev, "Failed to add subdevs\n");
			goto out;
		}
	}

	return 0;

out:
	i2c_set_clientdata(client, NULL);
	kfree(chip);
	return ret;
}

static int __devexit pm8607_remove(struct i2c_client *client)
{
	struct pm8607_chip *chip = i2c_get_clientdata(client);

	mfd_remove_devices(chip->dev);
	kfree(chip);
	return 0;
}

static struct i2c_driver pm8607_driver = {
	.driver	= {
		.name	= "88PM8607",
		.owner	= THIS_MODULE,
	},
	.probe		= pm8607_probe,
	.remove		= __devexit_p(pm8607_remove),
	.id_table	= pm8607_id_table,
};

static int __init pm8607_init(void)
{
	int ret;
	ret = i2c_add_driver(&pm8607_driver);
	if (ret != 0)
		pr_err("Failed to register 88PM8607 I2C driver: %d\n", ret);
	return ret;
}
subsys_initcall(pm8607_init);

static void __exit pm8607_exit(void)
{
	i2c_del_driver(&pm8607_driver);
}
module_exit(pm8607_exit);

MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM8607");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
4107da2a HZ	1	/*
	2	* Base driver for Marvell 88PM8607
	3	*
	4	* Copyright (C) 2009 Marvell International Ltd.
	5	* Haojian Zhuang <haojian.zhuang@marvell.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/module.h>
	14	#include <linux/interrupt.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/i2c.h>
	17	#include <linux/mfd/core.h>
	18	#include <linux/mfd/88pm8607.h>
	19
	20
	21	#define PM8607_REG_RESOURCE(_start, _end) \
	22	{ \
	23	.start = PM8607_##_start, \
	24	.end = PM8607_##_end, \
	25	.flags = IORESOURCE_IO, \
	26	}
	27
	28	static struct resource pm8607_regulator_resources[] = {
	29	PM8607_REG_RESOURCE(BUCK1, BUCK1),
	30	PM8607_REG_RESOURCE(BUCK2, BUCK2),
	31	PM8607_REG_RESOURCE(BUCK3, BUCK3),
	32	PM8607_REG_RESOURCE(LDO1, LDO1),
	33	PM8607_REG_RESOURCE(LDO2, LDO2),
	34	PM8607_REG_RESOURCE(LDO3, LDO3),
	35	PM8607_REG_RESOURCE(LDO4, LDO4),
	36	PM8607_REG_RESOURCE(LDO5, LDO5),
	37	PM8607_REG_RESOURCE(LDO6, LDO6),
	38	PM8607_REG_RESOURCE(LDO7, LDO7),
	39	PM8607_REG_RESOURCE(LDO8, LDO8),
	40	PM8607_REG_RESOURCE(LDO9, LDO9),
	41	PM8607_REG_RESOURCE(LDO10, LDO10),
	42	PM8607_REG_RESOURCE(LDO12, LDO12),
	43	PM8607_REG_RESOURCE(LDO14, LDO14),
	44	};
	45
	46	#define PM8607_REG_DEVS(_name, _id) \
	47	{ \
	48	.name = "88pm8607-" #_name, \
	49	.num_resources = 1, \
	50	.resources = &pm8607_regulator_resources[PM8607_ID_##_id], \
	51	}
	52
	53	static struct mfd_cell pm8607_devs[] = {
	54	PM8607_REG_DEVS(buck1, BUCK1),
	55	PM8607_REG_DEVS(buck2, BUCK2),
	56	PM8607_REG_DEVS(buck3, BUCK3),
	57	PM8607_REG_DEVS(ldo1, LDO1),
	58	PM8607_REG_DEVS(ldo2, LDO2),
	59	PM8607_REG_DEVS(ldo3, LDO3),
	60	PM8607_REG_DEVS(ldo4, LDO4),
	61	PM8607_REG_DEVS(ldo5, LDO5),
	62	PM8607_REG_DEVS(ldo6, LDO6),
	63	PM8607_REG_DEVS(ldo7, LDO7),
	64	PM8607_REG_DEVS(ldo8, LDO8),
65	PM8607_REG_DEVS(ldo9, LDO9),
66	PM8607_REG_DEVS(ldo10, LDO10),
67	PM8607_REG_DEVS(ldo12, LDO12),
68	PM8607_REG_DEVS(ldo14, LDO14),
69	};
70
71	static inline int pm8607_read_device(struct pm8607_chip *chip,
72	int reg, int bytes, void *dest)
73	{
74	struct i2c_client *i2c = chip->client;
75	unsigned char data;
76	int ret;
77
78	data = (unsigned char)reg;
79	ret = i2c_master_send(i2c, &data, 1);
80	if (ret < 0)
81	return ret;
82
83	ret = i2c_master_recv(i2c, dest, bytes);
84	if (ret < 0)
85	return ret;
86	return 0;
87	}
88
89	static inline int pm8607_write_device(struct pm8607_chip *chip,
90	int reg, int bytes, void *src)
91	{
92	struct i2c_client *i2c = chip->client;
93	unsigned char buf[bytes + 1];
94	int ret;
95
96	buf[0] = (unsigned char)reg;
97	memcpy(&buf[1], src, bytes);
98
99	ret = i2c_master_send(i2c, buf, bytes + 1);
100	if (ret < 0)
101	return ret;
102	return 0;
103	}
104
105	int pm8607_reg_read(struct pm8607_chip *chip, int reg)
106	{
107	unsigned char data;
108	int ret;
109
110	mutex_lock(&chip->io_lock);
111	ret = chip->read(chip, reg, 1, &data);
112	mutex_unlock(&chip->io_lock);
113
114	if (ret < 0)
115	return ret;
116	else
117	return (int)data;
118	}
119	EXPORT_SYMBOL(pm8607_reg_read);
120
121	int pm8607_reg_write(struct pm8607_chip *chip, int reg,
122	unsigned char data)
123	{
124	int ret;
125
126	mutex_lock(&chip->io_lock);
127	ret = chip->write(chip, reg, 1, &data);
128	mutex_unlock(&chip->io_lock);
129
130	return ret;
131	}
132	EXPORT_SYMBOL(pm8607_reg_write);
133
134	int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
135	int count, unsigned char *buf)
136	{
137	int ret;
138
139	mutex_lock(&chip->io_lock);
140	ret = chip->read(chip, reg, count, buf);
141	mutex_unlock(&chip->io_lock);
142
143	return ret;
144	}
145	EXPORT_SYMBOL(pm8607_bulk_read);
146
147	int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
148	int count, unsigned char *buf)
149	{
150	int ret;
151
152	mutex_lock(&chip->io_lock);
153	ret = chip->write(chip, reg, count, buf);
154	mutex_unlock(&chip->io_lock);
155
156	return ret;
157	}
158	EXPORT_SYMBOL(pm8607_bulk_write);
159
160	int pm8607_set_bits(struct pm8607_chip *chip, int reg,
161	unsigned char mask, unsigned char data)
162	{
163	unsigned char value;
164	int ret;
165
166	mutex_lock(&chip->io_lock);
167	ret = chip->read(chip, reg, 1, &value);
168	if (ret < 0)
169	goto out;
170	value &= ~mask;
171	value \|= data;
172	ret = chip->write(chip, reg, 1, &value);
173	out:
174	mutex_unlock(&chip->io_lock);
175	return ret;
176	}
177	EXPORT_SYMBOL(pm8607_set_bits);
178
179
180	static const struct i2c_device_id pm8607_id_table[] = {
181	{ "88PM8607", 0 },
182	{}
183	};
184	MODULE_DEVICE_TABLE(i2c, pm8607_id_table);
185
186
187	static int __devinit pm8607_probe(struct i2c_client *client,
188	const struct i2c_device_id *id)
189	{
190	struct pm8607_platform_data *pdata = client->dev.platform_data;
191	struct pm8607_chip *chip;
192	int i, count;
193	int ret;
194
195	chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
196	if (chip == NULL)
197	return -ENOMEM;
198
199	chip->client = client;
200	chip->dev = &client->dev;
201	chip->read = pm8607_read_device;
202	chip->write = pm8607_write_device;
203	i2c_set_clientdata(client, chip);
204
205	mutex_init(&chip->io_lock);
206	dev_set_drvdata(chip->dev, chip);
207
208	ret = pm8607_reg_read(chip, PM8607_CHIP_ID);
209	if (ret < 0) {
210	dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
211	goto out;
212	}
213	if ((ret & CHIP_ID_MASK) == CHIP_ID)
214	dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
215	ret);
216	else {
217	dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
218	"Chip ID: %02x\n", ret);
219	goto out;
220	}
221	chip->chip_id = ret;
222
223	ret = pm8607_reg_read(chip, PM8607_BUCK3);
224	if (ret < 0) {
225	dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
226	goto out;
227	}
228	if (ret & PM8607_BUCK3_DOUBLE)
229	chip->buck3_double = 1;
230
231	ret = pm8607_reg_read(chip, PM8607_MISC1);
232	if (ret < 0) {
233	dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
234	goto out;
235	}
236	if (pdata->i2c_port == PI2C_PORT)
237	ret \|= PM8607_MISC1_PI2C;
238	else
239	ret &= ~PM8607_MISC1_PI2C;
240	ret = pm8607_reg_write(chip, PM8607_MISC1, ret);
241	if (ret < 0) {
242	dev_err(chip->dev, "Failed to write MISC1 register: %d\n", ret);
243	goto out;
244	}
245
246
247	count = ARRAY_SIZE(pm8607_devs);
248	for (i = 0; i < count; i++) {
249	ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
250	1, NULL, 0);
251	if (ret != 0) {
252	dev_err(chip->dev, "Failed to add subdevs\n");
253	goto out;
254	}
255	}
256
257	return 0;
258
259	out:
260	i2c_set_clientdata(client, NULL);
261	kfree(chip);
262	return ret;
263	}
264
265	static int __devexit pm8607_remove(struct i2c_client *client)
266	{
267	struct pm8607_chip *chip = i2c_get_clientdata(client);
268
269	mfd_remove_devices(chip->dev);
270	kfree(chip);
271	return 0;
272	}
273
274	static struct i2c_driver pm8607_driver = {
275	.driver = {
276	.name = "88PM8607",
277	.owner = THIS_MODULE,
278	},
279	.probe = pm8607_probe,
280	.remove = __devexit_p(pm8607_remove),
281	.id_table = pm8607_id_table,
282	};
283
284	static int __init pm8607_init(void)
285	{
286	int ret;
287	ret = i2c_add_driver(&pm8607_driver);
288	if (ret != 0)
289	pr_err("Failed to register 88PM8607 I2C driver: %d\n", ret);
290	return ret;
291	}
292	subsys_initcall(pm8607_init);
293
294	static void __exit pm8607_exit(void)
295	{
296	i2c_del_driver(&pm8607_driver);
297	}
298	module_exit(pm8607_exit);
299
300	MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM8607");
301	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
302	MODULE_LICENSE("GPL");