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/*
* 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;
rsb_init();
ret = rsb_set_device_mode(AXP223_DEVICE_MODE_DATA);
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_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;
}
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);
}
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