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>
20 * This delay function is intended to be used only in early stage of boot, where
21 * clock are not set up yet. The timer used here is reset on every boot and
22 * takes a few seconds to roll. The boot doesn't take that long, so to keep the
23 * code simple, it doesn't take rolling into consideration.
25 void early_delay(int delay)
27 struct mxs_digctl_regs *digctl_regs =
28 (struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
30 uint32_t st = readl(&digctl_regs->hw_digctl_microseconds);
32 while (st > readl(&digctl_regs->hw_digctl_microseconds))
36 #define MUX_CONFIG_BOOTMODE_PAD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
37 static const iomux_cfg_t iomux_boot[] = {
38 #if defined(CONFIG_MX23)
39 MX23_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
40 MX23_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
41 MX23_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
42 MX23_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
43 MX23_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
44 MX23_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
45 #elif defined(CONFIG_MX28)
46 MX28_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
47 MX28_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
48 MX28_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
49 MX28_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
50 MX28_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
51 MX28_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
55 static uint8_t mxs_get_bootmode_index(void)
61 /* Setup IOMUX of bootmode pads to GPIO */
62 mxs_iomux_setup_multiple_pads(iomux_boot, ARRAY_SIZE(iomux_boot));
64 #if defined(CONFIG_MX23)
65 /* Setup bootmode pins as GPIO input */
66 gpio_direction_input(MX23_PAD_LCD_D00__GPIO_1_0);
67 gpio_direction_input(MX23_PAD_LCD_D01__GPIO_1_1);
68 gpio_direction_input(MX23_PAD_LCD_D02__GPIO_1_2);
69 gpio_direction_input(MX23_PAD_LCD_D03__GPIO_1_3);
70 gpio_direction_input(MX23_PAD_LCD_D05__GPIO_1_5);
72 /* Read bootmode pads */
73 bootmode |= (gpio_get_value(MX23_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
74 bootmode |= (gpio_get_value(MX23_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
75 bootmode |= (gpio_get_value(MX23_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
76 bootmode |= (gpio_get_value(MX23_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
77 bootmode |= (gpio_get_value(MX23_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
78 #elif defined(CONFIG_MX28)
79 /* Setup bootmode pins as GPIO input */
80 gpio_direction_input(MX28_PAD_LCD_D00__GPIO_1_0);
81 gpio_direction_input(MX28_PAD_LCD_D01__GPIO_1_1);
82 gpio_direction_input(MX28_PAD_LCD_D02__GPIO_1_2);
83 gpio_direction_input(MX28_PAD_LCD_D03__GPIO_1_3);
84 gpio_direction_input(MX28_PAD_LCD_D04__GPIO_1_4);
85 gpio_direction_input(MX28_PAD_LCD_D05__GPIO_1_5);
87 /* Read bootmode pads */
88 bootmode |= (gpio_get_value(MX28_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
89 bootmode |= (gpio_get_value(MX28_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
90 bootmode |= (gpio_get_value(MX28_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
91 bootmode |= (gpio_get_value(MX28_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
92 bootmode |= (gpio_get_value(MX28_PAD_LCD_D04__GPIO_1_4) ? 1 : 0) << 4;
93 bootmode |= (gpio_get_value(MX28_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
96 for (i = 0; i < ARRAY_SIZE(mxs_boot_modes); i++) {
97 masked = bootmode & mxs_boot_modes[i].boot_mask;
98 if (masked == mxs_boot_modes[i].boot_pads)
105 void mxs_common_spl_init(const iomux_cfg_t *iomux_setup,
106 const unsigned int iomux_size)
108 struct mxs_spl_data *data = (struct mxs_spl_data *)
109 ((CONFIG_SYS_TEXT_BASE - sizeof(struct mxs_spl_data)) & ~0xf);
110 uint8_t bootmode = mxs_get_bootmode_index();
112 mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
116 data->mem_dram_size = mxs_mem_get_size();
118 data->boot_mode_idx = bootmode;
120 mxs_power_wait_pswitch();
123 /* Support aparatus */
124 inline void board_init_f(unsigned long bootflag)
130 inline void board_init_r(gd_t *id, ulong dest_addr)