mirror of
https://github.com/AsahiLinux/u-boot
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161 lines
4.1 KiB
C
161 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Freescale i.MX28 Boot setup
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*
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* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
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* on behalf of DENX Software Engineering GmbH
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*/
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#include <common.h>
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#include <config.h>
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#include <init.h>
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#include <log.h>
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#include <serial.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/gpio.h>
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#include <linux/compiler.h>
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#include "mxs_init.h"
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DECLARE_GLOBAL_DATA_PTR;
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static gd_t gdata __section(".data");
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#ifdef CONFIG_SPL_SERIAL_SUPPORT
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static bd_t bdata __section(".data");
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#endif
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/*
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* This delay function is intended to be used only in early stage of boot, where
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* clock are not set up yet.
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*/
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void early_delay(int delay)
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{
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struct mxs_digctl_regs *digctl_regs =
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(struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
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uint32_t st = readl(&digctl_regs->hw_digctl_microseconds);
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while (readl(&digctl_regs->hw_digctl_microseconds) - st <= delay)
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;
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}
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#if defined(CONFIG_MX23)
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#define MUX_CONFIG_BOOTMODE_PAD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
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static const iomux_cfg_t iomux_boot[] = {
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MX23_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
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};
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#endif
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static uint8_t mxs_get_bootmode_index(void)
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{
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uint8_t bootmode = 0;
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int i;
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uint8_t masked;
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#if defined(CONFIG_MX23)
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/* Setup IOMUX of bootmode pads to GPIO */
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mxs_iomux_setup_multiple_pads(iomux_boot, ARRAY_SIZE(iomux_boot));
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/* Setup bootmode pins as GPIO input */
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gpio_direction_input(MX23_PAD_LCD_D00__GPIO_1_0);
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gpio_direction_input(MX23_PAD_LCD_D01__GPIO_1_1);
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gpio_direction_input(MX23_PAD_LCD_D02__GPIO_1_2);
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gpio_direction_input(MX23_PAD_LCD_D03__GPIO_1_3);
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gpio_direction_input(MX23_PAD_LCD_D05__GPIO_1_5);
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/* Read bootmode pads */
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
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#elif defined(CONFIG_MX28)
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/* The global boot mode will be detected by ROM code and its value
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* is stored at the fixed address 0x00019BF0 in OCRAM.
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*/
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#define GLOBAL_BOOT_MODE_ADDR 0x00019BF0
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bootmode = __raw_readl(GLOBAL_BOOT_MODE_ADDR);
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#endif
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for (i = 0; i < ARRAY_SIZE(mxs_boot_modes); i++) {
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masked = bootmode & mxs_boot_modes[i].boot_mask;
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if (masked == mxs_boot_modes[i].boot_pads)
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break;
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}
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return i;
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}
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static void mxs_spl_fixup_vectors(void)
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{
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/*
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* Copy our vector table to 0x0, since due to HAB, we cannot
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* be loaded to 0x0. We want to have working vectoring though,
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* thus this fixup. Our vectoring table is PIC, so copying is
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* fine.
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*/
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extern uint32_t _start;
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/* cppcheck-suppress nullPointer */
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memcpy(0x0, &_start, 0x60);
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}
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static void mxs_spl_console_init(void)
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{
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#ifdef CONFIG_SPL_SERIAL_SUPPORT
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gd->bd = &bdata;
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gd->baudrate = CONFIG_BAUDRATE;
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serial_init();
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gd->have_console = 1;
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#endif
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}
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void mxs_common_spl_init(const uint32_t arg, const uint32_t *resptr,
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const iomux_cfg_t *iomux_setup,
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const unsigned int iomux_size)
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{
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struct mxs_spl_data *data = MXS_SPL_DATA;
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uint8_t bootmode = mxs_get_bootmode_index();
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gd = &gdata;
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mxs_spl_fixup_vectors();
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mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
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mxs_spl_console_init();
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debug("SPL: Serial Console Initialised\n");
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mxs_power_init();
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mxs_mem_init();
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data->mem_dram_size = mxs_mem_get_size();
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data->boot_mode_idx = bootmode;
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mxs_power_wait_pswitch();
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if (mxs_boot_modes[data->boot_mode_idx].boot_pads == MXS_BM_JTAG) {
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debug("SPL: Waiting for JTAG user\n");
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asm volatile ("x: b x");
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}
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}
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#ifndef CONFIG_SPL_FRAMEWORK
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/* Support aparatus */
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inline void board_init_f(unsigned long bootflag)
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{
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for (;;)
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;
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}
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inline void board_init_r(gd_t *id, ulong dest_addr)
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{
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for (;;)
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;
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}
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#endif
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