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