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// SPDX-License-Identifier: GPL-2.0+
/*
* board.c
*
* Board functions for EETS PDU001 board
*
* Copyright (C) 2018, EETS GmbH, http://www.eets.ch/
*
* Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
*/
#include <common.h>
#include <env.h>
#include <errno.h>
#include <spl.h>
#include <i2c.h>
#include <watchdog.h>
#include <debug_uart.h>
#include <dm/ofnode.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <asm/arch/cpu.h>
#include <asm/arch/hardware.h>
#include <asm/arch/omap.h>
#include <asm/arch/ddr_defs.h>
#include <asm/arch/clock.h>
#include <asm/arch/gpio.h>
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/mem.h>
#include <asm/io.h>
#include <asm/emif.h>
#include <asm/gpio.h>
#include "board.h"
DECLARE_GLOBAL_DATA_PTR;
#define I2C_ADDR_NODE_ID 0x50
#define I2C_REG_NODE_ID_BASE 0xfa
#define NODE_ID_BYTE_COUNT 6
#define I2C_ADDR_LEDS 0x60
#define I2C_REG_RUN_LED 0x06
#define RUN_LED_OFF 0x0
#define RUN_LED_RED 0x1
#define RUN_LED_GREEN (0x1 << 2)
#define VDD_MPU_REGULATOR "regulator@2"
#define VDD_CORE_REGULATOR "regulator@3"
#define DEFAULT_CORE_VOLTAGE 1137500
/*
* boot device save register
* -------------------------
* The boot device can be quired by 'spl_boot_device()' in
* 'am33xx_spl_board_init'. However it can't be saved in the u-boot
* environment here. In turn 'spl_boot_device' can't be called in
* 'board_late_init' which allows writing to u-boot environment.
* To get the boot device from 'am33xx_spl_board_init' to
* 'board_late_init' we therefore use a scratch register from the RTC.
*/
#define CONFIG_SYS_RTC_SCRATCH0 0x60
#define BOOT_DEVICE_SAVE_REGISTER (RTC_BASE + CONFIG_SYS_RTC_SCRATCH0)
#ifdef CONFIG_SPL_BUILD
static void save_boot_device(void)
{
*((u32 *)(BOOT_DEVICE_SAVE_REGISTER)) = spl_boot_device();
}
#endif
u32 boot_device(void)
{
return *((u32 *)(BOOT_DEVICE_SAVE_REGISTER));
}
/* Store the boot device in the environment variable 'boot_device' */
static void env_set_boot_device(void)
{
switch (boot_device()) {
case BOOT_DEVICE_MMC1: {
env_set("boot_device", "emmc");
break;
}
case BOOT_DEVICE_MMC2: {
env_set("boot_device", "sdcard");
break;
}
default: {
env_set("boot_device", "unknown");
break;
}
}
}
static void set_run_led(struct udevice *dev)
{
int val = RUN_LED_OFF;
if (IS_ENABLED(CONFIG_RUN_LED_RED))
val = RUN_LED_RED;
else if (IS_ENABLED(CONFIG_RUN_LED_GREEN))
val = RUN_LED_GREEN;
dm_i2c_reg_write(dev, I2C_REG_RUN_LED, val);
}
/* Set 'serial#' to the EUI-48 value of board node ID chip */
static void env_set_serial(struct udevice *dev)
{
int val;
char serial[2 * NODE_ID_BYTE_COUNT + 1];
int n;
for (n = 0; n < sizeof(serial); n += 2) {
val = dm_i2c_reg_read(dev, I2C_REG_NODE_ID_BASE + n / 2);
sprintf(serial + n, "%02X", val);
}
serial[2 * NODE_ID_BYTE_COUNT] = '\0';
env_set("serial#", serial);
}
static void set_mpu_and_core_voltage(void)
{
int mpu_vdd;
int sil_rev;
struct udevice *dev;
struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
/*
* The PDU001 (more precisely the computing module m2) uses a
* TPS65910 PMIC. For all MPU frequencies we support we use a CORE
* voltage of 1.1375V. For MPU voltage we need to switch based on
* the frequency we are running at.
*/
/*
* Depending on MPU clock and PG we will need a different VDD
* to drive at that speed.
*/
sil_rev = readl(&cdev->deviceid) >> 28;
mpu_vdd = am335x_get_mpu_vdd(sil_rev, dpll_mpu_opp100.m);
/* first update the MPU voltage */
if (!regulator_get_by_devname(VDD_MPU_REGULATOR, &dev)) {
if (regulator_set_value(dev, mpu_vdd))
debug("failed to set MPU voltage\n");
} else {
debug("invalid MPU voltage ragulator %s\n", VDD_MPU_REGULATOR);
}
/* second update the CORE voltage */
if (!regulator_get_by_devname(VDD_CORE_REGULATOR, &dev)) {
if (regulator_set_value(dev, DEFAULT_CORE_VOLTAGE))
debug("failed to set CORE voltage\n");
} else {
debug("invalid CORE voltage ragulator %s\n",
VDD_CORE_REGULATOR);
}
}
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
static const struct ddr_data ddr2_data = {
.datardsratio0 = MT47H128M16RT25E_RD_DQS,
.datafwsratio0 = MT47H128M16RT25E_PHY_FIFO_WE,
.datawrsratio0 = MT47H128M16RT25E_PHY_WR_DATA,
};
static const struct cmd_control ddr2_cmd_ctrl_data = {
.cmd0csratio = MT47H128M16RT25E_RATIO,
.cmd1csratio = MT47H128M16RT25E_RATIO,
.cmd2csratio = MT47H128M16RT25E_RATIO,
};
static const struct emif_regs ddr2_emif_reg_data = {
.sdram_config = MT47H128M16RT25E_EMIF_SDCFG,
.ref_ctrl = MT47H128M16RT25E_EMIF_SDREF,
.sdram_tim1 = MT47H128M16RT25E_EMIF_TIM1,
.sdram_tim2 = MT47H128M16RT25E_EMIF_TIM2,
.sdram_tim3 = MT47H128M16RT25E_EMIF_TIM3,
.emif_ddr_phy_ctlr_1 = MT47H128M16RT25E_EMIF_READ_LATENCY,
};
#define OSC (V_OSCK / 1000000)
const struct dpll_params dpll_ddr = {
266, OSC - 1, 1, -1, -1, -1, -1};
const struct dpll_params dpll_ddr_evm_sk = {
303, OSC - 1, 1, -1, -1, -1, -1};
const struct dpll_params dpll_ddr_bone_black = {
400, OSC - 1, 1, -1, -1, -1, -1};
void am33xx_spl_board_init(void)
{
struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
/* Get the frequency */
dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev);
/* Set CORE Frequencies to OPP100 */
do_setup_dpll(&dpll_core_regs, &dpll_core_opp100);
/* Set MPU Frequency to what we detected now that voltages are set */
do_setup_dpll(&dpll_mpu_regs, &dpll_mpu_opp100);
/* save boot device for later use by 'board_late_init' */
save_boot_device();
}
const struct dpll_params *get_dpll_ddr_params(void)
{
enable_i2c0_pin_mux();
return &dpll_ddr;
}
void set_mux_conf_regs(void)
{
/* done first by the ROM and afterwards by the pin controller driver */
enable_i2c0_pin_mux();
}
const struct ctrl_ioregs ioregs = {
.cm0ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
.cm1ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
.cm2ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
.dt0ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
.dt1ioctl = MT47H128M16RT25E_IOCTRL_VALUE,
};
void sdram_init(void)
{
config_ddr(266, &ioregs, &ddr2_data,
&ddr2_cmd_ctrl_data, &ddr2_emif_reg_data, 0);
}
#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
#ifdef CONFIG_DEBUG_UART
void board_debug_uart_init(void)
{
/* done by pin controller driver if not debugging */
enable_uart_pin_mux(CONFIG_DEBUG_UART_BASE);
}
#endif
/*
* Basic board specific setup. Pinmux has been handled already.
*/
int board_init(void)
{
#ifdef CONFIG_HW_WATCHDOG
hw_watchdog_init();
#endif
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
return 0;
}
#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
struct udevice *dev;
set_mpu_and_core_voltage();
env_set_boot_device();
/* second I2C bus connects to node ID and front panel LED chip */
if (!i2c_get_chip_for_busnum(1, I2C_ADDR_LEDS, 1, &dev))
set_run_led(dev);
if (!i2c_get_chip_for_busnum(1, I2C_ADDR_NODE_ID, 1, &dev))
env_set_serial(dev);
return 0;
}
#endif