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