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