| /* |
| * AXP221 and AXP223 driver |
| * |
| * IMPORTANT when making changes to this file check that the registers |
| * used are the same for the axp221 and axp223. |
| * |
| * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com> |
| * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <errno.h> |
| #include <asm/arch/p2wi.h> |
| #include <asm/arch/rsb.h> |
| #include <axp221.h> |
| |
| /* |
| * The axp221 uses the p2wi bus, the axp223 is identical (for all registers |
| * used sofar) but uses the rsb bus. These functions abstract this. |
| */ |
| static int pmic_bus_init(void) |
| { |
| #ifdef CONFIG_MACH_SUN6I |
| p2wi_init(); |
| return p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR, |
| AXP221_INIT_DATA); |
| #else |
| int ret; |
| |
| ret = rsb_init(); |
| if (ret) |
| return ret; |
| |
| return rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR); |
| #endif |
| } |
| |
| static int pmic_bus_read(const u8 addr, u8 *data) |
| { |
| #ifdef CONFIG_MACH_SUN6I |
| return p2wi_read(addr, data); |
| #else |
| return rsb_read(AXP223_RUNTIME_ADDR, addr, data); |
| #endif |
| } |
| |
| static int pmic_bus_write(const u8 addr, u8 data) |
| { |
| #ifdef CONFIG_MACH_SUN6I |
| return p2wi_write(addr, data); |
| #else |
| return rsb_write(AXP223_RUNTIME_ADDR, addr, data); |
| #endif |
| } |
| |
| static u8 axp221_mvolt_to_cfg(int mvolt, int min, int max, int div) |
| { |
| if (mvolt < min) |
| mvolt = min; |
| else if (mvolt > max) |
| mvolt = max; |
| |
| return (mvolt - min) / div; |
| } |
| |
| static int axp221_setbits(u8 reg, u8 bits) |
| { |
| int ret; |
| u8 val; |
| |
| ret = pmic_bus_read(reg, &val); |
| if (ret) |
| return ret; |
| |
| val |= bits; |
| return pmic_bus_write(reg, val); |
| } |
| |
| static int axp221_clrbits(u8 reg, u8 bits) |
| { |
| int ret; |
| u8 val; |
| |
| ret = pmic_bus_read(reg, &val); |
| if (ret) |
| return ret; |
| |
| val &= ~bits; |
| return pmic_bus_write(reg, val); |
| } |
| |
| int axp221_set_dcdc1(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 1600, 3400, 100); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC1_EN); |
| |
| ret = pmic_bus_write(AXP221_DCDC1_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| ret = axp221_setbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DCDC1SW_EN); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC1_EN); |
| } |
| |
| int axp221_set_dcdc2(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC2_EN); |
| |
| ret = pmic_bus_write(AXP221_DCDC2_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC2_EN); |
| } |
| |
| int axp221_set_dcdc3(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1860, 20); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC3_EN); |
| |
| ret = pmic_bus_write(AXP221_DCDC3_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC3_EN); |
| } |
| |
| int axp221_set_dcdc4(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC4_EN); |
| |
| ret = pmic_bus_write(AXP221_DCDC4_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC4_EN); |
| } |
| |
| int axp221_set_dcdc5(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 1000, 2550, 50); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC5_EN); |
| |
| ret = pmic_bus_write(AXP221_DCDC5_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_DCDC5_EN); |
| } |
| |
| int axp221_set_dldo1(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DLDO1_EN); |
| |
| ret = pmic_bus_write(AXP221_DLDO1_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DLDO1_EN); |
| } |
| |
| int axp221_set_dldo2(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DLDO2_EN); |
| |
| ret = pmic_bus_write(AXP221_DLDO2_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DLDO2_EN); |
| } |
| |
| int axp221_set_dldo3(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DLDO3_EN); |
| |
| ret = pmic_bus_write(AXP221_DLDO3_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DLDO3_EN); |
| } |
| |
| int axp221_set_dldo4(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DLDO4_EN); |
| |
| ret = pmic_bus_write(AXP221_DLDO4_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL2, |
| AXP221_OUTPUT_CTRL2_DLDO4_EN); |
| } |
| |
| int axp221_set_aldo1(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_ALDO1_EN); |
| |
| ret = pmic_bus_write(AXP221_ALDO1_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_ALDO1_EN); |
| } |
| |
| int axp221_set_aldo2(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_ALDO2_EN); |
| |
| ret = pmic_bus_write(AXP221_ALDO2_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL1, |
| AXP221_OUTPUT_CTRL1_ALDO2_EN); |
| } |
| |
| int axp221_set_aldo3(unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL3, |
| AXP221_OUTPUT_CTRL3_ALDO3_EN); |
| |
| ret = pmic_bus_write(AXP221_ALDO3_CTRL, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL3, |
| AXP221_OUTPUT_CTRL3_ALDO3_EN); |
| } |
| |
| int axp221_set_eldo(int eldo_num, unsigned int mvolt) |
| { |
| int ret; |
| u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100); |
| u8 addr, bits; |
| |
| switch (eldo_num) { |
| case 3: |
| addr = AXP221_ELDO3_CTRL; |
| bits = AXP221_OUTPUT_CTRL2_ELDO3_EN; |
| break; |
| case 2: |
| addr = AXP221_ELDO2_CTRL; |
| bits = AXP221_OUTPUT_CTRL2_ELDO2_EN; |
| break; |
| case 1: |
| addr = AXP221_ELDO1_CTRL; |
| bits = AXP221_OUTPUT_CTRL2_ELDO1_EN; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (mvolt == 0) |
| return axp221_clrbits(AXP221_OUTPUT_CTRL2, bits); |
| |
| ret = pmic_bus_write(addr, cfg); |
| if (ret) |
| return ret; |
| |
| return axp221_setbits(AXP221_OUTPUT_CTRL2, bits); |
| } |
| |
| int axp221_init(void) |
| { |
| /* This cannot be 0 because it is used in SPL before BSS is ready */ |
| static int needs_init = 1; |
| u8 axp_chip_id; |
| int ret; |
| |
| if (!needs_init) |
| return 0; |
| |
| ret = pmic_bus_init(); |
| if (ret) |
| return ret; |
| |
| ret = pmic_bus_read(AXP221_CHIP_ID, &axp_chip_id); |
| if (ret) |
| return ret; |
| |
| if (!(axp_chip_id == 0x6 || axp_chip_id == 0x7 || axp_chip_id == 0x17)) |
| return -ENODEV; |
| |
| needs_init = 0; |
| return 0; |
| } |
| |
| int axp221_get_sid(unsigned int *sid) |
| { |
| u8 *dest = (u8 *)sid; |
| int i, ret; |
| |
| ret = axp221_init(); |
| if (ret) |
| return ret; |
| |
| ret = pmic_bus_write(AXP221_PAGE, 1); |
| if (ret) |
| return ret; |
| |
| for (i = 0; i < 16; i++) { |
| ret = pmic_bus_read(AXP221_SID + i, &dest[i]); |
| if (ret) |
| return ret; |
| } |
| |
| pmic_bus_write(AXP221_PAGE, 0); |
| |
| for (i = 0; i < 4; i++) |
| sid[i] = be32_to_cpu(sid[i]); |
| |
| return 0; |
| } |
| |
| int axp_get_vbus(void) |
| { |
| int ret; |
| u8 val; |
| |
| ret = axp221_init(); |
| if (ret) |
| return ret; |
| |
| ret = pmic_bus_read(AXP221_POWER_STATUS, &val); |
| if (ret) |
| return ret; |
| |
| return (val & AXP221_POWER_STATUS_VBUS_USABLE) ? 1 : 0; |
| } |
| |
| static int axp_drivebus_setup(void) |
| { |
| int ret; |
| |
| ret = axp221_init(); |
| if (ret) |
| return ret; |
| |
| /* Set N_VBUSEN pin to output / DRIVEBUS function */ |
| return axp221_clrbits(AXP221_MISC_CTRL, AXP221_MISC_CTRL_N_VBUSEN_FUNC); |
| } |
| |
| int axp_drivebus_enable(void) |
| { |
| int ret; |
| |
| ret = axp_drivebus_setup(); |
| if (ret) |
| return ret; |
| |
| /* Set DRIVEBUS high */ |
| return axp221_setbits(AXP221_VBUS_IPSOUT, AXP221_VBUS_IPSOUT_DRIVEBUS); |
| } |
| |
| int axp_drivebus_disable(void) |
| { |
| int ret; |
| |
| ret = axp_drivebus_setup(); |
| if (ret) |
| return ret; |
| |
| /* Set DRIVEBUS low */ |
| return axp221_clrbits(AXP221_VBUS_IPSOUT, AXP221_VBUS_IPSOUT_DRIVEBUS); |
| } |
