2 * Freescale i.MX28 Boot setup
4 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
5 * on behalf of DENX Software Engineering GmbH
7 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch/imx-regs.h>
14 #include <asm/arch/sys_proto.h>
16 #include <linux/compiler.h>
20 DECLARE_GLOBAL_DATA_PTR;
21 static gd_t gdata __section(".data");
22 #ifdef CONFIG_SPL_SERIAL_SUPPORT
23 static bd_t bdata __section(".data");
26 #define MUX_CONFIG_BOOTMODE_PAD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
27 static const iomux_cfg_t iomux_boot[] = {
28 #if defined(CONFIG_SOC_MX23)
29 MX23_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
30 MX23_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
31 MX23_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
32 MX23_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
33 MX23_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
34 MX23_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
38 static uint8_t mxs_get_bootmode_index(void)
44 #if defined(CONFIG_SOC_MX23)
45 /* Setup IOMUX of bootmode pads to GPIO */
46 mxs_iomux_setup_multiple_pads(iomux_boot, ARRAY_SIZE(iomux_boot));
48 /* Setup bootmode pins as GPIO input */
49 gpio_direction_input(MX23_PAD_LCD_D00__GPIO_1_0);
50 gpio_direction_input(MX23_PAD_LCD_D01__GPIO_1_1);
51 gpio_direction_input(MX23_PAD_LCD_D02__GPIO_1_2);
52 gpio_direction_input(MX23_PAD_LCD_D03__GPIO_1_3);
53 gpio_direction_input(MX23_PAD_LCD_D05__GPIO_1_5);
55 /* Read bootmode pads */
56 bootmode |= (gpio_get_value(MX23_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
57 bootmode |= (gpio_get_value(MX23_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
58 bootmode |= (gpio_get_value(MX23_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
59 bootmode |= (gpio_get_value(MX23_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
60 bootmode |= (gpio_get_value(MX23_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
61 #elif defined(CONFIG_SOC_MX28)
62 /* The global boot mode will be detected by ROM code and its value
63 * is stored at the fixed address 0x00019BF0 in OCRAM.
65 #define GLOBAL_BOOT_MODE_ADDR 0x00019BF0
66 bootmode = __raw_readl(GLOBAL_BOOT_MODE_ADDR);
69 for (i = 0; i < ARRAY_SIZE(mxs_boot_modes); i++) {
70 masked = bootmode & mxs_boot_modes[i].boot_mask;
71 if (masked == mxs_boot_modes[i].boot_pads)
78 static void mxs_spl_fixup_vectors(void)
81 * Copy our vector table to 0x0, since due to HAB, we cannot
82 * be loaded to 0x0. We want to have working vectoring though,
83 * thus this fixup. Our vectoring table is PIC, so copying is
86 extern uint32_t _start;
88 /* cppcheck-suppress nullPointer */
89 memcpy(0x0, &_start, 0x60);
92 static void mxs_spl_console_init(void)
94 #ifdef CONFIG_SPL_SERIAL_SUPPORT
96 gd->baudrate = CONFIG_BAUDRATE;
102 void mxs_common_spl_init(const uint32_t arg, const uint32_t *resptr,
103 const iomux_cfg_t *iomux_setup,
104 const unsigned int iomux_size)
106 struct mxs_spl_data *data = (struct mxs_spl_data *)
107 ((CONFIG_SYS_TEXT_BASE - sizeof(struct mxs_spl_data)) & ~0xf);
108 uint8_t bootmode = mxs_get_bootmode_index();
111 mxs_spl_fixup_vectors();
113 mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
115 mxs_spl_console_init();
116 debug("SPL: Serial Console Initialised\n");
121 data->mem_dram_size = mxs_mem_get_size();
123 data->boot_mode_idx = bootmode;
125 mxs_power_wait_pswitch();
127 if (mxs_boot_modes[data->boot_mode_idx].boot_pads == MXS_BM_JTAG) {
128 debug("SPL: Waiting for JTAG user\n");
129 asm volatile ("x: b x");
133 /* Support apparatus */
134 inline void board_init_f(unsigned long bootflag)
140 inline void board_init_r(gd_t *id, ulong dest_addr)