diff options
Diffstat (limited to 'drivers/mxc/mcu_pmic/mcu_pmic_core.c')
| -rw-r--r-- | drivers/mxc/mcu_pmic/mcu_pmic_core.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/drivers/mxc/mcu_pmic/mcu_pmic_core.c b/drivers/mxc/mcu_pmic/mcu_pmic_core.c new file mode 100644 index 000000000000..47c16d1659ca --- /dev/null +++ b/drivers/mxc/mcu_pmic/mcu_pmic_core.c @@ -0,0 +1,226 @@ +/* + * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @file mc9s08dz60/mcu_pmic_core.c + * @brief This is the main file of mc9s08dz60 Power Control driver. + * + * @ingroup PMIC_POWER + */ + +/* + * Includes + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/mfd/mc9s08dz60/pmic.h> +#include <asm/ioctl.h> +#include <asm/uaccess.h> +#include <mach/gpio.h> + +#include "mcu_pmic_core.h" +#include "mc9s08dz60.h" +#include "max8660.h" + +/* bitfield macros for mcu pmic*/ +#define SET_BIT_IN_BYTE(byte, pos) (byte |= (0x01 << pos)) +#define CLEAR_BIT_IN_BYTE(byte, pos) (byte &= ~(0x01 << pos)) + + +/* map reg names (enum pmic_reg in pmic_external.h) to real addr*/ +const static u8 mcu_pmic_reg_addr_table[] = { + MCU_VERSION, + MCU_SECS, + MCU_MINS, + MCU_HRS, + MCU_DAY, + MCU_DATE, + MCU_MONTH, + MCU_YEAR, + MCU_ALARM_SECS, + MCU_ALARM_MINS, + MCU_ALARM_HRS, + MCU_TS_CONTROL, + MCU_X_LOW, + MCU_Y_LOW, + MCU_XY_HIGH, + MCU_X_LEFT_LOW, + MCU_X_LEFT_HIGH, + MCU_X_RIGHT, + MCU_Y_TOP_LOW, + MCU_Y_TOP_HIGH, + MCU_Y_BOTTOM, + MCU_RESET_1, + MCU_RESET_2, + MCU_POWER_CTL, + MCU_DELAY_CONFIG, + MCU_GPIO_1, + MCU_GPIO_2, + MCU_KPD_1, + MCU_KPD_2, + MCU_KPD_CONTROL, + MCU_INT_ENABLE_1, + MCU_INT_ENABLE_2, + MCU_INT_FLAG_1, + MCU_INT_FLAG_2, + MCU_DES_FLAG, + MAX8660_OUTPUT_ENABLE_1, + MAX8660_OUTPUT_ENABLE_2, + MAX8660_VOLT_CHANGE_CONTROL, + MAX8660_V3_TARGET_VOLT_1, + MAX8660_V3_TARGET_VOLT_2, + MAX8660_V4_TARGET_VOLT_1, + MAX8660_V4_TARGET_VOLT_2, + MAX8660_V5_TARGET_VOLT_1, + MAX8660_V5_TARGET_VOLT_2, + MAX8660_V6V7_TARGET_VOLT, + MAX8660_FORCE_PWM +}; + +static int mcu_pmic_read(int reg_num, unsigned int *reg_val) +{ + int ret; + u8 value = 0; + /* mcu ops */ + if (reg_num >= REG_MCU_VERSION && reg_num <= REG_MCU_DES_FLAG) + ret = mc9s08dz60_read_reg(mcu_pmic_reg_addr_table[reg_num], + &value); + else if (reg_num >= REG_MAX8660_OUTPUT_ENABLE_1 + && reg_num <= REG_MAX8660_FORCE_PWM) + ret = max8660_get_buffered_reg_val(reg_num, &value); + else + return -1; + + if (ret < 0) + return -1; + *reg_val = value; + + return 0; +} + +static int mcu_pmic_write(int reg_num, const unsigned int reg_val) +{ + int ret; + u8 value = reg_val; + /* mcu ops */ + if (reg_num >= REG_MCU_VERSION && reg_num <= REG_MCU_DES_FLAG) { + + ret = + mc9s08dz60_write_reg( + mcu_pmic_reg_addr_table[reg_num], value); + if (ret < 0) + return -1; + } else if (reg_num >= REG_MAX8660_OUTPUT_ENABLE_1 + && reg_num <= REG_MAX8660_FORCE_PWM) { + ret = + max8660_write_reg(mcu_pmic_reg_addr_table[reg_num], value); + + if (ret < 0) + return -1; + + ret = max8660_save_buffered_reg_val(reg_num, value); + } else + return -1; + + return 0; +} + +int mcu_pmic_read_reg(int reg, unsigned int *reg_value, + unsigned int reg_mask) +{ + int ret = 0; + unsigned int temp = 0; + + ret = mcu_pmic_read(reg, &temp); + if (ret != 0) + return -1; + *reg_value = (temp & reg_mask); + + pr_debug("Read REG[ %d ] = 0x%x\n", reg, *reg_value); + + return ret; +} + + +int mcu_pmic_write_reg(int reg, unsigned int reg_value, + unsigned int reg_mask) +{ + int ret = 0; + unsigned int temp = 0; + + ret = mcu_pmic_read(reg, &temp); + if (ret != 0) + return -1; + temp = (temp & (~reg_mask)) | reg_value; + + ret = mcu_pmic_write(reg, temp); + if (ret != 0) + return -1; + + pr_debug("Write REG[ %d ] = 0x%x\n", reg, reg_value); + + return ret; +} + +/*! + * make max8660 - mc9s08dz60 enter low-power mode + */ +static void pmic_power_off(void) +{ + mcu_pmic_write_reg(REG_MCU_POWER_CTL, 0x10, 0x10); +} + +static int __init mcu_pmic_init(void) +{ + int err; + + /* init chips */ + err = max8660_init(); + if (err) + goto fail1; + + err = mc9s08dz60_init(); + if (err) + goto fail1; + + if (is_max8660_present()) { + pr_info("max8660 is present \n"); + pm_power_off = pmic_power_off; + } else + pr_debug("max8660 is not present\n"); + pr_info("mcu_pmic_init completed!\n"); + return 0; + +fail1: + pr_err("mcu_pmic_init failed!\n"); + return err; +} + +static void __exit mcu_pmic_exit(void) +{ + reg_max8660_remove(); + mc9s08dz60_exit(); + max8660_exit(); +} + +subsys_initcall_sync(mcu_pmic_init); +module_exit(mcu_pmic_exit); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("mcu pmic driver"); +MODULE_LICENSE("GPL"); |