diff options
Diffstat (limited to 'drivers/mfd/max8997.c')
| -rw-r--r-- | drivers/mfd/max8997.c | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c new file mode 100644 index 00000000..cb83a7ab --- /dev/null +++ b/drivers/mfd/max8997.c @@ -0,0 +1,459 @@ +/* + * max8997.c - mfd core driver for the Maxim 8966 and 8997 + * + * Copyright (C) 2011 Samsung Electronics + * MyungJoo Ham <myungjoo.ham@smasung.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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * This driver is based on max8998.c + */ + +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/pm_runtime.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/mfd/core.h> +#include <linux/mfd/max8997.h> +#include <linux/mfd/max8997-private.h> + +#define I2C_ADDR_PMIC (0xCC >> 1) +#define I2C_ADDR_MUIC (0x4A >> 1) +#define I2C_ADDR_BATTERY (0x6C >> 1) +#define I2C_ADDR_RTC (0x0C >> 1) +#define I2C_ADDR_HAPTIC (0x90 >> 1) + +static struct mfd_cell max8997_devs[] = { + { .name = "max8997-pmic", }, + { .name = "max8997-rtc", }, + { .name = "max8997-battery", }, + { .name = "max8997-haptic", }, + { .name = "max8997-muic", }, + { .name = "max8997-led", .id = 1 }, + { .name = "max8997-led", .id = 2 }, +}; + +int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) +{ + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + int ret; + + mutex_lock(&max8997->iolock); + ret = i2c_smbus_read_byte_data(i2c, reg); + mutex_unlock(&max8997->iolock); + if (ret < 0) + return ret; + + ret &= 0xff; + *dest = ret; + return 0; +} +EXPORT_SYMBOL_GPL(max8997_read_reg); + +int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf) +{ + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + int ret; + + mutex_lock(&max8997->iolock); + ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf); + mutex_unlock(&max8997->iolock); + if (ret < 0) + return ret; + + return 0; +} +EXPORT_SYMBOL_GPL(max8997_bulk_read); + +int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value) +{ + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + int ret; + + mutex_lock(&max8997->iolock); + ret = i2c_smbus_write_byte_data(i2c, reg, value); + mutex_unlock(&max8997->iolock); + return ret; +} +EXPORT_SYMBOL_GPL(max8997_write_reg); + +int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf) +{ + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + int ret; + + mutex_lock(&max8997->iolock); + ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf); + mutex_unlock(&max8997->iolock); + if (ret < 0) + return ret; + + return 0; +} +EXPORT_SYMBOL_GPL(max8997_bulk_write); + +int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) +{ + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + int ret; + + mutex_lock(&max8997->iolock); + ret = i2c_smbus_read_byte_data(i2c, reg); + if (ret >= 0) { + u8 old_val = ret & 0xff; + u8 new_val = (val & mask) | (old_val & (~mask)); + ret = i2c_smbus_write_byte_data(i2c, reg, new_val); + } + mutex_unlock(&max8997->iolock); + return ret; +} +EXPORT_SYMBOL_GPL(max8997_update_reg); + +static int max8997_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct max8997_dev *max8997; + struct max8997_platform_data *pdata = i2c->dev.platform_data; + int ret = 0; + + max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL); + if (max8997 == NULL) + return -ENOMEM; + + i2c_set_clientdata(i2c, max8997); + max8997->dev = &i2c->dev; + max8997->i2c = i2c; + max8997->type = id->driver_data; + max8997->irq = i2c->irq; + + if (!pdata) + goto err; + + max8997->irq_base = pdata->irq_base; + max8997->ono = pdata->ono; + + mutex_init(&max8997->iolock); + + max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC); + i2c_set_clientdata(max8997->rtc, max8997); + max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); + i2c_set_clientdata(max8997->haptic, max8997); + max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); + i2c_set_clientdata(max8997->muic, max8997); + + pm_runtime_set_active(max8997->dev); + + max8997_irq_init(max8997); + + mfd_add_devices(max8997->dev, -1, max8997_devs, + ARRAY_SIZE(max8997_devs), + NULL, 0); + + /* + * TODO: enable others (flash, muic, rtc, battery, ...) and + * check the return value + */ + + if (ret < 0) + goto err_mfd; + + /* MAX8997 has a power button input. */ + device_init_wakeup(max8997->dev, pdata->wakeup); + + return ret; + +err_mfd: + mfd_remove_devices(max8997->dev); + i2c_unregister_device(max8997->muic); + i2c_unregister_device(max8997->haptic); + i2c_unregister_device(max8997->rtc); +err: + kfree(max8997); + return ret; +} + +static int max8997_i2c_remove(struct i2c_client *i2c) +{ + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + + mfd_remove_devices(max8997->dev); + i2c_unregister_device(max8997->muic); + i2c_unregister_device(max8997->haptic); + i2c_unregister_device(max8997->rtc); + kfree(max8997); + + return 0; +} + +static const struct i2c_device_id max8997_i2c_id[] = { + { "max8997", TYPE_MAX8997 }, + { "max8966", TYPE_MAX8966 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max8998_i2c_id); + +u8 max8997_dumpaddr_pmic[] = { + MAX8997_REG_INT1MSK, + MAX8997_REG_INT2MSK, + MAX8997_REG_INT3MSK, + MAX8997_REG_INT4MSK, + MAX8997_REG_MAINCON1, + MAX8997_REG_MAINCON2, + MAX8997_REG_BUCKRAMP, + MAX8997_REG_BUCK1CTRL, + MAX8997_REG_BUCK1DVS1, + MAX8997_REG_BUCK1DVS2, + MAX8997_REG_BUCK1DVS3, + MAX8997_REG_BUCK1DVS4, + MAX8997_REG_BUCK1DVS5, + MAX8997_REG_BUCK1DVS6, + MAX8997_REG_BUCK1DVS7, + MAX8997_REG_BUCK1DVS8, + MAX8997_REG_BUCK2CTRL, + MAX8997_REG_BUCK2DVS1, + MAX8997_REG_BUCK2DVS2, + MAX8997_REG_BUCK2DVS3, + MAX8997_REG_BUCK2DVS4, + MAX8997_REG_BUCK2DVS5, + MAX8997_REG_BUCK2DVS6, + MAX8997_REG_BUCK2DVS7, + MAX8997_REG_BUCK2DVS8, + MAX8997_REG_BUCK3CTRL, + MAX8997_REG_BUCK3DVS, + MAX8997_REG_BUCK4CTRL, + MAX8997_REG_BUCK4DVS, + MAX8997_REG_BUCK5CTRL, + MAX8997_REG_BUCK5DVS1, + MAX8997_REG_BUCK5DVS2, + MAX8997_REG_BUCK5DVS3, + MAX8997_REG_BUCK5DVS4, + MAX8997_REG_BUCK5DVS5, + MAX8997_REG_BUCK5DVS6, + MAX8997_REG_BUCK5DVS7, + MAX8997_REG_BUCK5DVS8, + MAX8997_REG_BUCK6CTRL, + MAX8997_REG_BUCK6BPSKIPCTRL, + MAX8997_REG_BUCK7CTRL, + MAX8997_REG_BUCK7DVS, + MAX8997_REG_LDO1CTRL, + MAX8997_REG_LDO2CTRL, + MAX8997_REG_LDO3CTRL, + MAX8997_REG_LDO4CTRL, + MAX8997_REG_LDO5CTRL, + MAX8997_REG_LDO6CTRL, + MAX8997_REG_LDO7CTRL, + MAX8997_REG_LDO8CTRL, + MAX8997_REG_LDO9CTRL, + MAX8997_REG_LDO10CTRL, + MAX8997_REG_LDO11CTRL, + MAX8997_REG_LDO12CTRL, + MAX8997_REG_LDO13CTRL, + MAX8997_REG_LDO14CTRL, + MAX8997_REG_LDO15CTRL, + MAX8997_REG_LDO16CTRL, + MAX8997_REG_LDO17CTRL, + MAX8997_REG_LDO18CTRL, + MAX8997_REG_LDO21CTRL, + MAX8997_REG_MBCCTRL1, + MAX8997_REG_MBCCTRL2, + MAX8997_REG_MBCCTRL3, + MAX8997_REG_MBCCTRL4, + MAX8997_REG_MBCCTRL5, + MAX8997_REG_MBCCTRL6, + MAX8997_REG_OTPCGHCVS, + MAX8997_REG_SAFEOUTCTRL, + MAX8997_REG_LBCNFG1, + MAX8997_REG_LBCNFG2, + MAX8997_REG_BBCCTRL, + + MAX8997_REG_FLASH1_CUR, + MAX8997_REG_FLASH2_CUR, + MAX8997_REG_MOVIE_CUR, + MAX8997_REG_GSMB_CUR, + MAX8997_REG_BOOST_CNTL, + MAX8997_REG_LEN_CNTL, + MAX8997_REG_FLASH_CNTL, + MAX8997_REG_WDT_CNTL, + MAX8997_REG_MAXFLASH1, + MAX8997_REG_MAXFLASH2, + MAX8997_REG_FLASHSTATUSMASK, + + MAX8997_REG_GPIOCNTL1, + MAX8997_REG_GPIOCNTL2, + MAX8997_REG_GPIOCNTL3, + MAX8997_REG_GPIOCNTL4, + MAX8997_REG_GPIOCNTL5, + MAX8997_REG_GPIOCNTL6, + MAX8997_REG_GPIOCNTL7, + MAX8997_REG_GPIOCNTL8, + MAX8997_REG_GPIOCNTL9, + MAX8997_REG_GPIOCNTL10, + MAX8997_REG_GPIOCNTL11, + MAX8997_REG_GPIOCNTL12, + + MAX8997_REG_LDO1CONFIG, + MAX8997_REG_LDO2CONFIG, + MAX8997_REG_LDO3CONFIG, + MAX8997_REG_LDO4CONFIG, + MAX8997_REG_LDO5CONFIG, + MAX8997_REG_LDO6CONFIG, + MAX8997_REG_LDO7CONFIG, + MAX8997_REG_LDO8CONFIG, + MAX8997_REG_LDO9CONFIG, + MAX8997_REG_LDO10CONFIG, + MAX8997_REG_LDO11CONFIG, + MAX8997_REG_LDO12CONFIG, + MAX8997_REG_LDO13CONFIG, + MAX8997_REG_LDO14CONFIG, + MAX8997_REG_LDO15CONFIG, + MAX8997_REG_LDO16CONFIG, + MAX8997_REG_LDO17CONFIG, + MAX8997_REG_LDO18CONFIG, + MAX8997_REG_LDO21CONFIG, + + MAX8997_REG_DVSOKTIMER1, + MAX8997_REG_DVSOKTIMER2, + MAX8997_REG_DVSOKTIMER4, + MAX8997_REG_DVSOKTIMER5, +}; + +u8 max8997_dumpaddr_muic[] = { + MAX8997_MUIC_REG_INTMASK1, + MAX8997_MUIC_REG_INTMASK2, + MAX8997_MUIC_REG_INTMASK3, + MAX8997_MUIC_REG_CDETCTRL, + MAX8997_MUIC_REG_CONTROL1, + MAX8997_MUIC_REG_CONTROL2, + MAX8997_MUIC_REG_CONTROL3, +}; + +u8 max8997_dumpaddr_haptic[] = { + MAX8997_HAPTIC_REG_CONF1, + MAX8997_HAPTIC_REG_CONF2, + MAX8997_HAPTIC_REG_DRVCONF, + MAX8997_HAPTIC_REG_CYCLECONF1, + MAX8997_HAPTIC_REG_CYCLECONF2, + MAX8997_HAPTIC_REG_SIGCONF1, + MAX8997_HAPTIC_REG_SIGCONF2, + MAX8997_HAPTIC_REG_SIGCONF3, + MAX8997_HAPTIC_REG_SIGCONF4, + MAX8997_HAPTIC_REG_SIGDC1, + MAX8997_HAPTIC_REG_SIGDC2, + MAX8997_HAPTIC_REG_SIGPWMDC1, + MAX8997_HAPTIC_REG_SIGPWMDC2, + MAX8997_HAPTIC_REG_SIGPWMDC3, + MAX8997_HAPTIC_REG_SIGPWMDC4, +}; + +static int max8997_freeze(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + int i; + + for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++) + max8997_read_reg(i2c, max8997_dumpaddr_pmic[i], + &max8997->reg_dump[i]); + + for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++) + max8997_read_reg(i2c, max8997_dumpaddr_muic[i], + &max8997->reg_dump[i + MAX8997_REG_PMIC_END]); + + for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++) + max8997_read_reg(i2c, max8997_dumpaddr_haptic[i], + &max8997->reg_dump[i + MAX8997_REG_PMIC_END + + MAX8997_MUIC_REG_END]); + + return 0; +} + +static int max8997_restore(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + int i; + + for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++) + max8997_write_reg(i2c, max8997_dumpaddr_pmic[i], + max8997->reg_dump[i]); + + for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++) + max8997_write_reg(i2c, max8997_dumpaddr_muic[i], + max8997->reg_dump[i + MAX8997_REG_PMIC_END]); + + for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++) + max8997_write_reg(i2c, max8997_dumpaddr_haptic[i], + max8997->reg_dump[i + MAX8997_REG_PMIC_END + + MAX8997_MUIC_REG_END]); + + return 0; +} + +static int max8997_suspend(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) + irq_set_irq_wake(max8997->irq, 1); + return 0; +} + +static int max8997_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct max8997_dev *max8997 = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) + irq_set_irq_wake(max8997->irq, 0); + return max8997_irq_resume(max8997); +} + +const struct dev_pm_ops max8997_pm = { + .suspend = max8997_suspend, + .resume = max8997_resume, + .freeze = max8997_freeze, + .restore = max8997_restore, +}; + +static struct i2c_driver max8997_i2c_driver = { + .driver = { + .name = "max8997", + .owner = THIS_MODULE, + .pm = &max8997_pm, + }, + .probe = max8997_i2c_probe, + .remove = max8997_i2c_remove, + .id_table = max8997_i2c_id, +}; + +static int __init max8997_i2c_init(void) +{ + return i2c_add_driver(&max8997_i2c_driver); +} +/* init early so consumer devices can complete system boot */ +subsys_initcall(max8997_i2c_init); + +static void __exit max8997_i2c_exit(void) +{ + i2c_del_driver(&max8997_i2c_driver); +} +module_exit(max8997_i2c_exit); + +MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver"); +MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); +MODULE_LICENSE("GPL"); |