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 static bd_t bdata __section(".data");
25 * This delay function is intended to be used only in early stage of boot, where
26 * clock are not set up yet. The timer used here is reset on every boot and
27 * takes a few seconds to roll. The boot doesn't take that long, so to keep the
28 * code simple, it doesn't take rolling into consideration.
30 void early_delay(int delay)
32 struct mxs_digctl_regs *digctl_regs =
33 (struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
35 uint32_t st = readl(&digctl_regs->hw_digctl_microseconds);
37 while (st > readl(&digctl_regs->hw_digctl_microseconds))
41 #define MUX_CONFIG_BOOTMODE_PAD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
42 static const iomux_cfg_t iomux_boot[] = {
43 #if defined(CONFIG_MX23)
44 MX23_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
45 MX23_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
46 MX23_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
47 MX23_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
48 MX23_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
49 MX23_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
50 #elif defined(CONFIG_MX28)
51 MX28_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
52 MX28_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
53 MX28_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
54 MX28_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
55 MX28_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
56 MX28_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
60 static uint8_t mxs_get_bootmode_index(void)
66 /* Setup IOMUX of bootmode pads to GPIO */
67 mxs_iomux_setup_multiple_pads(iomux_boot, ARRAY_SIZE(iomux_boot));
69 #if defined(CONFIG_MX23)
70 /* Setup bootmode pins as GPIO input */
71 gpio_direction_input(MX23_PAD_LCD_D00__GPIO_1_0);
72 gpio_direction_input(MX23_PAD_LCD_D01__GPIO_1_1);
73 gpio_direction_input(MX23_PAD_LCD_D02__GPIO_1_2);
74 gpio_direction_input(MX23_PAD_LCD_D03__GPIO_1_3);
75 gpio_direction_input(MX23_PAD_LCD_D05__GPIO_1_5);
77 /* Read bootmode pads */
78 bootmode |= (gpio_get_value(MX23_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
79 bootmode |= (gpio_get_value(MX23_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
80 bootmode |= (gpio_get_value(MX23_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
81 bootmode |= (gpio_get_value(MX23_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
82 bootmode |= (gpio_get_value(MX23_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
83 #elif defined(CONFIG_MX28)
84 /* Setup bootmode pins as GPIO input */
85 gpio_direction_input(MX28_PAD_LCD_D00__GPIO_1_0);
86 gpio_direction_input(MX28_PAD_LCD_D01__GPIO_1_1);
87 gpio_direction_input(MX28_PAD_LCD_D02__GPIO_1_2);
88 gpio_direction_input(MX28_PAD_LCD_D03__GPIO_1_3);
89 gpio_direction_input(MX28_PAD_LCD_D04__GPIO_1_4);
90 gpio_direction_input(MX28_PAD_LCD_D05__GPIO_1_5);
92 /* Read bootmode pads */
93 bootmode |= (gpio_get_value(MX28_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
94 bootmode |= (gpio_get_value(MX28_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
95 bootmode |= (gpio_get_value(MX28_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
96 bootmode |= (gpio_get_value(MX28_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
97 bootmode |= (gpio_get_value(MX28_PAD_LCD_D04__GPIO_1_4) ? 1 : 0) << 4;
98 bootmode |= (gpio_get_value(MX28_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
101 for (i = 0; i < ARRAY_SIZE(mxs_boot_modes); i++) {
102 masked = bootmode & mxs_boot_modes[i].boot_mask;
103 if (masked == mxs_boot_modes[i].boot_pads)
110 static void mxs_spl_fixup_vectors(void)
113 * Copy our vector table to 0x0, since due to HAB, we cannot
114 * be loaded to 0x0. We want to have working vectoring though,
115 * thus this fixup. Our vectoring table is PIC, so copying is
118 extern uint32_t _start;
119 memcpy(0x0, &_start, 0x60);
122 static void mxs_spl_console_init(void)
124 #ifdef CONFIG_SPL_SERIAL_SUPPORT
126 gd->baudrate = CONFIG_BAUDRATE;
128 gd->have_console = 1;
132 void mxs_common_spl_init(const uint32_t arg, const uint32_t *resptr,
133 const iomux_cfg_t *iomux_setup,
134 const unsigned int iomux_size)
136 struct mxs_spl_data *data = (struct mxs_spl_data *)
137 ((CONFIG_SYS_TEXT_BASE - sizeof(struct mxs_spl_data)) & ~0xf);
138 uint8_t bootmode = mxs_get_bootmode_index();
141 mxs_spl_fixup_vectors();
143 mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
145 mxs_spl_console_init();
150 data->mem_dram_size = mxs_mem_get_size();
152 data->boot_mode_idx = bootmode;
154 mxs_power_wait_pswitch();
157 /* Support aparatus */
158 inline void board_init_f(unsigned long bootflag)
164 inline void board_init_r(gd_t *id, ulong dest_addr)