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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2012-2016 Toradex, Inc.
*/
#include <common.h>
#include <log.h>
#include <asm/io.h>
#include <asm/arch-tegra/tegra_i2c.h>
#include <linux/delay.h>
/* AS3722-PMIC-specific early init regs */
#define AS3722_I2C_ADDR 0x80
#define AS3722_SD0VOLTAGE_REG 0x00 /* CPU */
#define AS3722_SD1VOLTAGE_REG 0x01 /* CORE, already set by OTP */
#define AS3722_SD6VOLTAGE_REG 0x06 /* GPU */
#define AS3722_SDCONTROL_REG 0x4D
#define AS3722_LDO1VOLTAGE_REG 0x11 /* VDD_SDMMC1 */
#define AS3722_LDO2VOLTAGE_REG 0x12 /* VPP_FUSE */
#define AS3722_LDO6VOLTAGE_REG 0x16 /* VDD_SDMMC3 */
#define AS3722_LDCONTROL_REG 0x4E
#define AS3722_SD0VOLTAGE_DATA (0x3C00 | AS3722_SD0VOLTAGE_REG)
#define AS3722_SD0CONTROL_DATA (0x0100 | AS3722_SDCONTROL_REG)
#define AS3722_SD1VOLTAGE_DATA (0x3200 | AS3722_SD1VOLTAGE_REG)
#define AS3722_SD1CONTROL_DATA (0x0200 | AS3722_SDCONTROL_REG)
#define AS3722_SD6CONTROL_DATA (0x4000 | AS3722_SDCONTROL_REG)
#define AS3722_SD6VOLTAGE_DATA (0x2800 | AS3722_SD6VOLTAGE_REG)
#define AS3722_LDO1CONTROL_DATA (0x0200 | AS3722_LDCONTROL_REG)
#define AS3722_LDO1VOLTAGE_DATA (0x7F00 | AS3722_LDO1VOLTAGE_REG)
#define AS3722_LDO2CONTROL_DATA (0x0400 | AS3722_LDCONTROL_REG)
#define AS3722_LDO2VOLTAGE_DATA (0x1000 | AS3722_LDO2VOLTAGE_REG)
#define AS3722_LDO6CONTROL_DATA (0x4000 | AS3722_LDCONTROL_REG)
#define AS3722_LDO6VOLTAGE_DATA (0x3F00 | AS3722_LDO6VOLTAGE_REG)
/* AS3722-PMIC-specific early init code - get CPU rails up, etc */
void pmic_enable_cpu_vdd(void)
{
debug("%s entry\n", __func__);
#ifdef AS3722_SD1VOLTAGE_DATA
/* Set up VDD_CORE, for boards where OTP is incorrect*/
debug("%s: Setting VDD_CORE via AS3722 reg 1\n", __func__);
/* Configure VDD_CORE via the AS3722 PMIC on the PWR I2C bus */
tegra_i2c_ll_write(AS3722_I2C_ADDR,
AS3722_SD1VOLTAGE_DATA);
/*
* Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled.
* tegra_i2c_ll_write_data(AS3722_SD1CONTROL_DATA, I2C_SEND_2_BYTES);
*/
udelay(10 * 1000);
#endif
/*
* Make sure all non-fused regulators are down.
* That way we're in known state after software reboot from linux
*/
tegra_i2c_ll_write(AS3722_I2C_ADDR, 0x0003);
udelay(10 * 1000);
tegra_i2c_ll_write(AS3722_I2C_ADDR, 0x0004);
udelay(10 * 1000);
tegra_i2c_ll_write(AS3722_I2C_ADDR, 0x001b);
udelay(10 * 1000);
tegra_i2c_ll_write(AS3722_I2C_ADDR, 0x0014);
udelay(10 * 1000);
tegra_i2c_ll_write(AS3722_I2C_ADDR, 0x001a);
udelay(10 * 1000);
tegra_i2c_ll_write(AS3722_I2C_ADDR, 0x0019);
udelay(10 * 1000);
debug("%s: Setting VDD_CPU to 1.0V via AS3722 reg 0/4D\n", __func__);
/*
* Bring up VDD_CPU via the AS3722 PMIC on the PWR I2C bus.
* First set VDD to 1.0V, then enable the VDD regulator.
*/
tegra_i2c_ll_write(AS3722_I2C_ADDR,
AS3722_SD0VOLTAGE_DATA);
/*
* Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled.
* tegra_i2c_ll_write_data(AS3722_SD0CONTROL_DATA, I2C_SEND_2_BYTES);
*/
udelay(10 * 1000);
debug("%s: Setting VDD_GPU to 1.0V via AS3722 reg 6/4D\n", __func__);
/*
* Bring up VDD_GPU via the AS3722 PMIC on the PWR I2C bus.
* First set VDD to 1.0V, then enable the VDD regulator.
*/
tegra_i2c_ll_write(AS3722_I2C_ADDR,
AS3722_SD6VOLTAGE_DATA);
/*
* Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled.
* tegra_i2c_ll_write_data(AS3722_SD6CONTROL_DATA, I2C_SEND_2_BYTES);
*/
udelay(10 * 1000);
debug("%s: Set VPP_FUSE to 1.2V via AS3722 reg 0x12/4E\n", __func__);
/*
* Bring up VPP_FUSE via the AS3722 PMIC on the PWR I2C bus.
* First set VDD to 1.2V, then enable the VDD regulator.
*/
tegra_i2c_ll_write(AS3722_I2C_ADDR,
AS3722_LDO2VOLTAGE_DATA);
/*
* Don't write LDCONTROL - it's already 0xFF, i.e. all LDOs enabled.
* tegra_i2c_ll_write_data(AS3722_LDO2CONTROL_DATA, I2C_SEND_2_BYTES);
*/
udelay(10 * 1000);
debug("%s: Set VDD_SDMMC1 to 3.3V via AS3722 reg 0x11/4E\n", __func__);
/*
* Bring up VDD_SDMMC1 via the AS3722 PMIC on the PWR I2C bus.
* First set it to value closest to 3.3V, then enable the regulator
*
* NOTE: We do this early because doing it later seems to hose the CPU
* power rail/partition startup. Need to debug.
*/
tegra_i2c_ll_write(AS3722_I2C_ADDR,
AS3722_LDO1VOLTAGE_DATA);
/*
* Don't write LDCONTROL - it's already 0xFF, i.e. all LDOs enabled.
* tegra_i2c_ll_write_data(AS3722_LDO1CONTROL_DATA, I2C_SEND_2_BYTES);
*/
udelay(10 * 1000);
debug("%s: Set VDD_SDMMC3 to 3.3V via AS3722 reg 0x16/4E\n", __func__);
/*
* Bring up VDD_SDMMC3 via the AS3722 PMIC on the PWR I2C bus.
* First set it to bypass 3.3V straight thru, then enable the regulator
*
* NOTE: We do this early because doing it later seems to hose the CPU
* power rail/partition startup. Need to debug.
*/
tegra_i2c_ll_write(AS3722_I2C_ADDR,
AS3722_LDO6VOLTAGE_DATA);
/*
* Don't write LDCONTROL - it's already 0xFF, i.e. all LDOs enabled.
* tegra_i2c_ll_write_data(AS3722_LDO6CONTROL_DATA, I2C_SEND_2_BYTES);
*/
udelay(10 * 1000);
}
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