diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/mfd/88pm860x-i2c.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/mfd/88pm860x-i2c.c | 390 |
1 files changed, 0 insertions, 390 deletions
diff --git a/ANDROID_3.4.5/drivers/mfd/88pm860x-i2c.c b/ANDROID_3.4.5/drivers/mfd/88pm860x-i2c.c deleted file mode 100644 index b2cfdc45..00000000 --- a/ANDROID_3.4.5/drivers/mfd/88pm860x-i2c.c +++ /dev/null @@ -1,390 +0,0 @@ -/* - * I2C driver for Marvell 88PM860x - * - * 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/platform_device.h> -#include <linux/i2c.h> -#include <linux/err.h> -#include <linux/regmap.h> -#include <linux/mfd/88pm860x.h> -#include <linux/slab.h> - -int pm860x_reg_read(struct i2c_client *i2c, int reg) -{ - struct pm860x_chip *chip = i2c_get_clientdata(i2c); - struct regmap *map = (i2c == chip->client) ? chip->regmap - : chip->regmap_companion; - unsigned int data; - int ret; - - ret = regmap_read(map, reg, &data); - if (ret < 0) - return ret; - else - return (int)data; -} -EXPORT_SYMBOL(pm860x_reg_read); - -int pm860x_reg_write(struct i2c_client *i2c, int reg, - unsigned char data) -{ - struct pm860x_chip *chip = i2c_get_clientdata(i2c); - struct regmap *map = (i2c == chip->client) ? chip->regmap - : chip->regmap_companion; - int ret; - - ret = regmap_write(map, reg, data); - return ret; -} -EXPORT_SYMBOL(pm860x_reg_write); - -int pm860x_bulk_read(struct i2c_client *i2c, int reg, - int count, unsigned char *buf) -{ - struct pm860x_chip *chip = i2c_get_clientdata(i2c); - struct regmap *map = (i2c == chip->client) ? chip->regmap - : chip->regmap_companion; - int ret; - - ret = regmap_raw_read(map, reg, buf, count); - return ret; -} -EXPORT_SYMBOL(pm860x_bulk_read); - -int pm860x_bulk_write(struct i2c_client *i2c, int reg, - int count, unsigned char *buf) -{ - struct pm860x_chip *chip = i2c_get_clientdata(i2c); - struct regmap *map = (i2c == chip->client) ? chip->regmap - : chip->regmap_companion; - int ret; - - ret = regmap_raw_write(map, reg, buf, count); - return ret; -} -EXPORT_SYMBOL(pm860x_bulk_write); - -int pm860x_set_bits(struct i2c_client *i2c, int reg, - unsigned char mask, unsigned char data) -{ - struct pm860x_chip *chip = i2c_get_clientdata(i2c); - struct regmap *map = (i2c == chip->client) ? chip->regmap - : chip->regmap_companion; - int ret; - - ret = regmap_update_bits(map, reg, mask, data); - return ret; -} -EXPORT_SYMBOL(pm860x_set_bits); - -static int read_device(struct i2c_client *i2c, int reg, - int bytes, void *dest) -{ - unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX + 3]; - unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX + 2]; - struct i2c_adapter *adap = i2c->adapter; - struct i2c_msg msg[2] = {{i2c->addr, 0, 1, msgbuf0}, - {i2c->addr, I2C_M_RD, 0, msgbuf1}, - }; - int num = 1, ret = 0; - - if (dest == NULL) - return -EINVAL; - msgbuf0[0] = (unsigned char)reg; /* command */ - msg[1].len = bytes; - - /* if data needs to read back, num should be 2 */ - if (bytes > 0) - num = 2; - ret = adap->algo->master_xfer(adap, msg, num); - memcpy(dest, msgbuf1, bytes); - if (ret < 0) - return ret; - return 0; -} - -static int write_device(struct i2c_client *i2c, int reg, - int bytes, void *src) -{ - unsigned char buf[bytes + 1]; - struct i2c_adapter *adap = i2c->adapter; - struct i2c_msg msg; - int ret; - - buf[0] = (unsigned char)reg; - memcpy(&buf[1], src, bytes); - msg.addr = i2c->addr; - msg.flags = 0; - msg.len = bytes + 1; - msg.buf = buf; - - ret = adap->algo->master_xfer(adap, &msg, 1); - if (ret < 0) - return ret; - return 0; -} - -int pm860x_page_reg_read(struct i2c_client *i2c, int reg) -{ - unsigned char zero = 0; - unsigned char data; - int ret; - - i2c_lock_adapter(i2c->adapter); - read_device(i2c, 0xFA, 0, &zero); - read_device(i2c, 0xFB, 0, &zero); - read_device(i2c, 0xFF, 0, &zero); - ret = read_device(i2c, reg, 1, &data); - if (ret >= 0) - ret = (int)data; - read_device(i2c, 0xFE, 0, &zero); - read_device(i2c, 0xFC, 0, &zero); - i2c_unlock_adapter(i2c->adapter); - return ret; -} -EXPORT_SYMBOL(pm860x_page_reg_read); - -int pm860x_page_reg_write(struct i2c_client *i2c, int reg, - unsigned char data) -{ - unsigned char zero; - int ret; - - i2c_lock_adapter(i2c->adapter); - read_device(i2c, 0xFA, 0, &zero); - read_device(i2c, 0xFB, 0, &zero); - read_device(i2c, 0xFF, 0, &zero); - ret = write_device(i2c, reg, 1, &data); - read_device(i2c, 0xFE, 0, &zero); - read_device(i2c, 0xFC, 0, &zero); - i2c_unlock_adapter(i2c->adapter); - return ret; -} -EXPORT_SYMBOL(pm860x_page_reg_write); - -int pm860x_page_bulk_read(struct i2c_client *i2c, int reg, - int count, unsigned char *buf) -{ - unsigned char zero = 0; - int ret; - - i2c_lock_adapter(i2c->adapter); - read_device(i2c, 0xfa, 0, &zero); - read_device(i2c, 0xfb, 0, &zero); - read_device(i2c, 0xff, 0, &zero); - ret = read_device(i2c, reg, count, buf); - read_device(i2c, 0xFE, 0, &zero); - read_device(i2c, 0xFC, 0, &zero); - i2c_unlock_adapter(i2c->adapter); - return ret; -} -EXPORT_SYMBOL(pm860x_page_bulk_read); - -int pm860x_page_bulk_write(struct i2c_client *i2c, int reg, - int count, unsigned char *buf) -{ - unsigned char zero = 0; - int ret; - - i2c_lock_adapter(i2c->adapter); - read_device(i2c, 0xFA, 0, &zero); - read_device(i2c, 0xFB, 0, &zero); - read_device(i2c, 0xFF, 0, &zero); - ret = write_device(i2c, reg, count, buf); - read_device(i2c, 0xFE, 0, &zero); - read_device(i2c, 0xFC, 0, &zero); - i2c_unlock_adapter(i2c->adapter); - i2c_unlock_adapter(i2c->adapter); - return ret; -} -EXPORT_SYMBOL(pm860x_page_bulk_write); - -int pm860x_page_set_bits(struct i2c_client *i2c, int reg, - unsigned char mask, unsigned char data) -{ - unsigned char zero; - unsigned char value; - int ret; - - i2c_lock_adapter(i2c->adapter); - read_device(i2c, 0xFA, 0, &zero); - read_device(i2c, 0xFB, 0, &zero); - read_device(i2c, 0xFF, 0, &zero); - ret = read_device(i2c, reg, 1, &value); - if (ret < 0) - goto out; - value &= ~mask; - value |= data; - ret = write_device(i2c, reg, 1, &value); -out: - read_device(i2c, 0xFE, 0, &zero); - read_device(i2c, 0xFC, 0, &zero); - i2c_unlock_adapter(i2c->adapter); - return ret; -} -EXPORT_SYMBOL(pm860x_page_set_bits); - -static const struct i2c_device_id pm860x_id_table[] = { - { "88PM860x", 0 }, - {} -}; -MODULE_DEVICE_TABLE(i2c, pm860x_id_table); - -static int verify_addr(struct i2c_client *i2c) -{ - unsigned short addr_8607[] = {0x30, 0x34}; - unsigned short addr_8606[] = {0x10, 0x11}; - int size, i; - - if (i2c == NULL) - return 0; - size = ARRAY_SIZE(addr_8606); - for (i = 0; i < size; i++) { - if (i2c->addr == *(addr_8606 + i)) - return CHIP_PM8606; - } - size = ARRAY_SIZE(addr_8607); - for (i = 0; i < size; i++) { - if (i2c->addr == *(addr_8607 + i)) - return CHIP_PM8607; - } - return 0; -} - -static struct regmap_config pm860x_regmap_config = { - .reg_bits = 8, - .val_bits = 8, -}; - -static int __devinit pm860x_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct pm860x_platform_data *pdata = client->dev.platform_data; - struct pm860x_chip *chip; - int ret; - - if (!pdata) { - pr_info("No platform data in %s!\n", __func__); - return -EINVAL; - } - - chip = kzalloc(sizeof(struct pm860x_chip), GFP_KERNEL); - if (chip == NULL) - return -ENOMEM; - - chip->id = verify_addr(client); - chip->regmap = regmap_init_i2c(client, &pm860x_regmap_config); - if (IS_ERR(chip->regmap)) { - ret = PTR_ERR(chip->regmap); - dev_err(&client->dev, "Failed to allocate register map: %d\n", - ret); - kfree(chip); - return ret; - } - chip->client = client; - i2c_set_clientdata(client, chip); - chip->dev = &client->dev; - dev_set_drvdata(chip->dev, chip); - - /* - * Both client and companion client shares same platform driver. - * Driver distinguishes them by pdata->companion_addr. - * pdata->companion_addr is only assigned if companion chip exists. - * At the same time, the companion_addr shouldn't equal to client - * address. - */ - if (pdata->companion_addr && (pdata->companion_addr != client->addr)) { - chip->companion_addr = pdata->companion_addr; - chip->companion = i2c_new_dummy(chip->client->adapter, - chip->companion_addr); - chip->regmap_companion = regmap_init_i2c(chip->companion, - &pm860x_regmap_config); - if (IS_ERR(chip->regmap_companion)) { - ret = PTR_ERR(chip->regmap_companion); - dev_err(&chip->companion->dev, - "Failed to allocate register map: %d\n", ret); - return ret; - } - i2c_set_clientdata(chip->companion, chip); - } - - pm860x_device_init(chip, pdata); - return 0; -} - -static int __devexit pm860x_remove(struct i2c_client *client) -{ - struct pm860x_chip *chip = i2c_get_clientdata(client); - - pm860x_device_exit(chip); - if (chip->companion) { - regmap_exit(chip->regmap_companion); - i2c_unregister_device(chip->companion); - } - regmap_exit(chip->regmap); - kfree(chip); - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int pm860x_suspend(struct device *dev) -{ - struct i2c_client *client = container_of(dev, struct i2c_client, dev); - struct pm860x_chip *chip = i2c_get_clientdata(client); - - if (device_may_wakeup(dev) && chip->wakeup_flag) - enable_irq_wake(chip->core_irq); - return 0; -} - -static int pm860x_resume(struct device *dev) -{ - struct i2c_client *client = container_of(dev, struct i2c_client, dev); - struct pm860x_chip *chip = i2c_get_clientdata(client); - - if (device_may_wakeup(dev) && chip->wakeup_flag) - disable_irq_wake(chip->core_irq); - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(pm860x_pm_ops, pm860x_suspend, pm860x_resume); - -static struct i2c_driver pm860x_driver = { - .driver = { - .name = "88PM860x", - .owner = THIS_MODULE, - .pm = &pm860x_pm_ops, - }, - .probe = pm860x_probe, - .remove = __devexit_p(pm860x_remove), - .id_table = pm860x_id_table, -}; - -static int __init pm860x_i2c_init(void) -{ - int ret; - ret = i2c_add_driver(&pm860x_driver); - if (ret != 0) - pr_err("Failed to register 88PM860x I2C driver: %d\n", ret); - return ret; -} -subsys_initcall(pm860x_i2c_init); - -static void __exit pm860x_i2c_exit(void) -{ - i2c_del_driver(&pm860x_driver); -} -module_exit(pm860x_i2c_exit); - -MODULE_DESCRIPTION("I2C Driver for Marvell 88PM860x"); -MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); -MODULE_LICENSE("GPL"); |