mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-28 13:53:44 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
162 lines
4.2 KiB
C
162 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Freescale i.MX28 Boot setup
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*
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* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
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* on behalf of DENX Software Engineering GmbH
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*/
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#include <common.h>
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#include <config.h>
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#include <asm/io.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/gpio.h>
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#include <linux/compiler.h>
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#include "mxs_init.h"
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DECLARE_GLOBAL_DATA_PTR;
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static gd_t gdata __section(".data");
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#ifdef CONFIG_SPL_SERIAL_SUPPORT
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static bd_t bdata __section(".data");
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#endif
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/*
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* This delay function is intended to be used only in early stage of boot, where
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* clock are not set up yet. The timer used here is reset on every boot and
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* takes a few seconds to roll. The boot doesn't take that long, so to keep the
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* code simple, it doesn't take rolling into consideration.
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*/
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void early_delay(int delay)
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{
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struct mxs_digctl_regs *digctl_regs =
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(struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
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uint32_t st = readl(&digctl_regs->hw_digctl_microseconds);
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st += delay;
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while (st > readl(&digctl_regs->hw_digctl_microseconds))
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;
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}
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#if defined(CONFIG_MX23)
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#define MUX_CONFIG_BOOTMODE_PAD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
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static const iomux_cfg_t iomux_boot[] = {
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MX23_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
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MX23_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
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};
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#endif
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static uint8_t mxs_get_bootmode_index(void)
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{
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uint8_t bootmode = 0;
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int i;
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uint8_t masked;
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#if defined(CONFIG_MX23)
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/* Setup IOMUX of bootmode pads to GPIO */
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mxs_iomux_setup_multiple_pads(iomux_boot, ARRAY_SIZE(iomux_boot));
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/* Setup bootmode pins as GPIO input */
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gpio_direction_input(MX23_PAD_LCD_D00__GPIO_1_0);
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gpio_direction_input(MX23_PAD_LCD_D01__GPIO_1_1);
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gpio_direction_input(MX23_PAD_LCD_D02__GPIO_1_2);
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gpio_direction_input(MX23_PAD_LCD_D03__GPIO_1_3);
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gpio_direction_input(MX23_PAD_LCD_D05__GPIO_1_5);
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/* Read bootmode pads */
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
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bootmode |= (gpio_get_value(MX23_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
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#elif defined(CONFIG_MX28)
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/* The global boot mode will be detected by ROM code and its value
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* is stored at the fixed address 0x00019BF0 in OCRAM.
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*/
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#define GLOBAL_BOOT_MODE_ADDR 0x00019BF0
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bootmode = __raw_readl(GLOBAL_BOOT_MODE_ADDR);
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#endif
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for (i = 0; i < ARRAY_SIZE(mxs_boot_modes); i++) {
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masked = bootmode & mxs_boot_modes[i].boot_mask;
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if (masked == mxs_boot_modes[i].boot_pads)
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break;
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}
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return i;
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}
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static void mxs_spl_fixup_vectors(void)
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{
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/*
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* Copy our vector table to 0x0, since due to HAB, we cannot
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* be loaded to 0x0. We want to have working vectoring though,
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* thus this fixup. Our vectoring table is PIC, so copying is
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* fine.
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*/
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extern uint32_t _start;
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/* cppcheck-suppress nullPointer */
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memcpy(0x0, &_start, 0x60);
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}
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static void mxs_spl_console_init(void)
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{
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#ifdef CONFIG_SPL_SERIAL_SUPPORT
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gd->bd = &bdata;
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gd->baudrate = CONFIG_BAUDRATE;
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serial_init();
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gd->have_console = 1;
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#endif
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}
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void mxs_common_spl_init(const uint32_t arg, const uint32_t *resptr,
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const iomux_cfg_t *iomux_setup,
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const unsigned int iomux_size)
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{
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struct mxs_spl_data *data = MXS_SPL_DATA;
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uint8_t bootmode = mxs_get_bootmode_index();
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gd = &gdata;
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mxs_spl_fixup_vectors();
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mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
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mxs_spl_console_init();
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debug("SPL: Serial Console Initialised\n");
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mxs_power_init();
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mxs_mem_init();
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data->mem_dram_size = mxs_mem_get_size();
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data->boot_mode_idx = bootmode;
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mxs_power_wait_pswitch();
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if (mxs_boot_modes[data->boot_mode_idx].boot_pads == MXS_BM_JTAG) {
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debug("SPL: Waiting for JTAG user\n");
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asm volatile ("x: b x");
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}
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}
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#ifndef CONFIG_SPL_FRAMEWORK
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/* Support aparatus */
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inline void board_init_f(unsigned long bootflag)
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{
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for (;;)
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;
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}
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inline void board_init_r(gd_t *id, ulong dest_addr)
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{
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for (;;)
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;
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}
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#endif
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