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