mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-22 04:30:31 +09:00
![Lukasz Majewski](/assets/img/avatar_default.png)
This patch provides information regarding the boot stage with using LEDs. On the very beginning of U-Boot execution the GREEN LED is turned on. When the execution is passed to Linux kernel the GREEN LED is off and RED one is ON. Afterwards, when Linux takes over the execution, the "heartbeat" driver provides indication if the board is still alive. Please also note that this patch uses {set|clr}bits_le32 macros as turning ON GREEN LED is performed in a _very_ early stage of U-Boot execution before DM_GPIOs are initialized. Signed-off-by: Lukasz Majewski <lukma@denx.de>
205 lines
4.1 KiB
C
205 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018
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* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
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*/
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#include <common.h>
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#include <init.h>
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#include <asm/io.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/crm_regs.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/iomux-mx53.h>
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#include <asm/arch/clock.h>
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#include <asm/gpio.h>
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#include <env.h>
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#include <power/pmic.h>
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#include <fsl_pmic.h>
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#include <bootstage.h>
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#include "kp_id_rev.h"
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#define BOOSTER_OFF IMX_GPIO_NR(2, 23)
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#define LCD_BACKLIGHT IMX_GPIO_NR(1, 1)
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#define KEY1 IMX_GPIO_NR(2, 26)
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#define LED_RED IMX_GPIO_NR(3, 28)
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DECLARE_GLOBAL_DATA_PTR;
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int dram_init(void)
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{
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u32 size;
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size = get_ram_size((void *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
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gd->ram_size = size;
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return 0;
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}
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int dram_init_banksize(void)
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{
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gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
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gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
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return 0;
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}
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static int power_init(void)
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{
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struct udevice *dev;
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int ret;
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ret = pmic_get("mc34708@8", &dev);
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if (ret) {
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printf("%s: mc34708 not found !\n", __func__);
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return ret;
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}
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/* Set VDDGP to 1.110V for 800 MHz on SW1 */
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pmic_clrsetbits(dev, REG_SW_0, SWx_VOLT_MASK_MC34708,
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SWx_1_110V_MC34708);
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/* Set VCC as 1.30V on SW2 */
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pmic_clrsetbits(dev, REG_SW_1, SWx_VOLT_MASK_MC34708,
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SWx_1_300V_MC34708);
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/* Set global reset timer to 4s */
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pmic_clrsetbits(dev, REG_POWER_CTL2, TIMER_MASK_MC34708,
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TIMER_4S_MC34708);
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return ret;
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}
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static void setup_clocks(void)
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{
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int ret;
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u32 ref_clk = MXC_HCLK;
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/*
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* CPU clock set to 800MHz and DDR to 400MHz
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*/
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ret = mxc_set_clock(ref_clk, 800, MXC_ARM_CLK);
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if (ret)
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printf("CPU: Switch CPU clock to 800MHZ failed\n");
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ret = mxc_set_clock(ref_clk, 400, MXC_PERIPH_CLK);
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ret |= mxc_set_clock(ref_clk, 400, MXC_DDR_CLK);
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if (ret)
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printf("CPU: Switch DDR clock to 400MHz failed\n");
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}
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static void setup_ups(void)
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{
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gpio_request(BOOSTER_OFF, "BOOSTER_OFF");
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gpio_direction_output(BOOSTER_OFF, 0);
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}
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int board_early_init_f(void)
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{
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return 0;
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}
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/*
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* Do not overwrite the console
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* Use always serial for U-Boot console
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*/
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int overwrite_console(void)
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{
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return 1;
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}
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int board_init(void)
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{
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gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
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return 0;
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}
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void board_disable_display(void)
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{
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gpio_request(LCD_BACKLIGHT, "LCD_BACKLIGHT");
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gpio_direction_output(LCD_BACKLIGHT, 0);
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}
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void board_misc_setup(void)
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{
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gpio_request(KEY1, "KEY1_GPIO");
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gpio_direction_input(KEY1);
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if (gpio_get_value(KEY1))
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env_set("key1", "off");
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else
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env_set("key1", "on");
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}
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int board_late_init(void)
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{
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int ret = 0;
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board_disable_display();
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setup_ups();
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if (!power_init())
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setup_clocks();
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ret = read_eeprom();
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if (ret)
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printf("Error %d reading EEPROM content!\n", ret);
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show_eeprom();
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read_board_id();
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board_misc_setup();
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return ret;
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}
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#define GPIO_DR 0x0
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#define GPIO_GDIR 0x4
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#define GPIO_ALT1 0x1
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#define GPIO5_BASE 0x53FDC000
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#define IOMUXC_EIM_WAIT 0x53FA81E4
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/* Green LED: GPIO5_0 */
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#define GPIO_GREEN BIT(0)
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void show_boot_progress(int status)
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{
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/*
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* This BOOTSTAGE_ID is called at very early stage of execution. DM gpio
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* is not yet initialized.
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*/
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if (status == BOOTSTAGE_ID_START_UBOOT_F) {
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/*
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* After ROM execution the EIM_WAIT PAD is set as ALT0
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* (according to RM it shall be ALT1 after reset). To use it as
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* GPIO we need to set it to ALT1.
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*/
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setbits_le32(((uint32_t *)(IOMUXC_EIM_WAIT)), GPIO_ALT1);
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/* Configure green LED GPIO pin direction */
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setbits_le32(((uint32_t *)(GPIO5_BASE + GPIO_GDIR)),
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GPIO_GREEN);
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/* Turn on green LED */
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setbits_le32(((uint32_t *)(GPIO5_BASE + GPIO_DR)), GPIO_GREEN);
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}
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/*
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* This BOOTSTAGE_ID is called just before handling execution to kernel
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* - i.e. gpio subsystem is already initialized
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*/
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if (status == BOOTSTAGE_ID_BOOTM_HANDOFF) {
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/*
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* Off green LED - the same approach - i.e. non dm gpio
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* (*bits_le32) is used as in the very early stage.
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*/
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clrbits_le32(((uint32_t *)(GPIO5_BASE + GPIO_DR)),
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GPIO_GREEN);
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/*
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* On red LED
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*/
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gpio_request(LED_RED, "LED_RED_ERROR");
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gpio_direction_output(LED_RED, 1);
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}
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}
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