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/*
* Freescale i.MX28 Boot setup
*
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <config.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/sys_proto.h>
#include <asm/gpio.h>
#include <linux/compiler.h>
#include "mxs_init.h"
DECLARE_GLOBAL_DATA_PTR;
static gd_t gdata __section(".data");
#ifdef CONFIG_SPL_SERIAL_SUPPORT
static bd_t bdata __section(".data");
#endif
/*
* This delay function is intended to be used only in early stage of boot, where
* clock are not set up yet. The timer used here is reset on every boot and
* takes a few seconds to roll. The boot doesn't take that long, so to keep the
* code simple, it doesn't take rolling into consideration.
*/
void early_delay(int delay)
{
struct mxs_digctl_regs *digctl_regs =
(struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
uint32_t st = readl(&digctl_regs->hw_digctl_microseconds);
st += delay;
while (st > readl(&digctl_regs->hw_digctl_microseconds))
;
}
#define MUX_CONFIG_BOOTMODE_PAD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
static const iomux_cfg_t iomux_boot[] = {
#if defined(CONFIG_MX23)
MX23_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
MX23_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
MX23_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
MX23_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
MX23_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
MX23_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
#endif
};
static uint8_t mxs_get_bootmode_index(void)
{
uint8_t bootmode = 0;
int i;
uint8_t masked;
#if defined(CONFIG_MX23)
/* Setup IOMUX of bootmode pads to GPIO */
mxs_iomux_setup_multiple_pads(iomux_boot, ARRAY_SIZE(iomux_boot));
/* Setup bootmode pins as GPIO input */
gpio_direction_input(MX23_PAD_LCD_D00__GPIO_1_0);
gpio_direction_input(MX23_PAD_LCD_D01__GPIO_1_1);
gpio_direction_input(MX23_PAD_LCD_D02__GPIO_1_2);
gpio_direction_input(MX23_PAD_LCD_D03__GPIO_1_3);
gpio_direction_input(MX23_PAD_LCD_D05__GPIO_1_5);
/* Read bootmode pads */
bootmode |= (gpio_get_value(MX23_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
bootmode |= (gpio_get_value(MX23_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
bootmode |= (gpio_get_value(MX23_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
bootmode |= (gpio_get_value(MX23_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
bootmode |= (gpio_get_value(MX23_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
#elif defined(CONFIG_MX28)
/* The global boot mode will be detected by ROM code and its value
* is stored at the fixed address 0x00019BF0 in OCRAM.
*/
#define GLOBAL_BOOT_MODE_ADDR 0x00019BF0
bootmode = __raw_readl(GLOBAL_BOOT_MODE_ADDR);
#endif
for (i = 0; i < ARRAY_SIZE(mxs_boot_modes); i++) {
masked = bootmode & mxs_boot_modes[i].boot_mask;
if (masked == mxs_boot_modes[i].boot_pads)
break;
}
return i;
}
static void mxs_spl_fixup_vectors(void)
{
/*
* Copy our vector table to 0x0, since due to HAB, we cannot
* be loaded to 0x0. We want to have working vectoring though,
* thus this fixup. Our vectoring table is PIC, so copying is
* fine.
*/
extern uint32_t _start;
/* cppcheck-suppress nullPointer */
memcpy(0x0, &_start, 0x60);
}
static void mxs_spl_console_init(void)
{
#ifdef CONFIG_SPL_SERIAL_SUPPORT
gd->bd = &bdata;
gd->baudrate = CONFIG_BAUDRATE;
serial_init();
gd->have_console = 1;
#endif
}
void mxs_common_spl_init(const uint32_t arg, const uint32_t *resptr,
const iomux_cfg_t *iomux_setup,
const unsigned int iomux_size)
{
struct mxs_spl_data *data = (struct mxs_spl_data *)
((CONFIG_SYS_TEXT_BASE - sizeof(struct mxs_spl_data)) & ~0xf);
uint8_t bootmode = mxs_get_bootmode_index();
gd = &gdata;
mxs_spl_fixup_vectors();
mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
mxs_spl_console_init();
debug("SPL: Serial Console Initialised\n");
mxs_power_init();
mxs_mem_init();
data->mem_dram_size = mxs_mem_get_size();
data->boot_mode_idx = bootmode;
mxs_power_wait_pswitch();
if (mxs_boot_modes[data->boot_mode_idx].boot_pads == MXS_BM_JTAG) {
debug("SPL: Waiting for JTAG user\n");
asm volatile ("x: b x");
}
}
/* Support aparatus */
inline void board_init_f(unsigned long bootflag)
{
for (;;)
;
}
inline void board_init_r(gd_t *id, ulong dest_addr)
{
for (;;)
;
}
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