mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 07:57:21 +00:00
3a0398d7b9
Most code can be shared between i.MX23 and i.MX28 as both are from i.MXS family; this source directory structure makes easy to share code among them. Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Acked-by: Stefano Babic <sbabic@denx.de>
135 lines
4 KiB
C
135 lines
4 KiB
C
/*
|
|
* Freescale i.MX28 Boot setup
|
|
*
|
|
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
|
|
* on behalf of DENX Software Engineering GmbH
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/iomux-mx28.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
#include <asm/arch/sys_proto.h>
|
|
#include <asm/gpio.h>
|
|
|
|
#include "mx28_init.h"
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
#define HW_DIGCTRL_MICROSECONDS 0x8001c0c0
|
|
void early_delay(int delay)
|
|
{
|
|
uint32_t st = readl(HW_DIGCTRL_MICROSECONDS);
|
|
st += delay;
|
|
while (st > readl(HW_DIGCTRL_MICROSECONDS))
|
|
;
|
|
}
|
|
|
|
#define MUX_CONFIG_BOOTMODE_PAD (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
|
|
const iomux_cfg_t iomux_boot[] = {
|
|
MX28_PAD_LCD_D00__GPIO_1_0 | MUX_CONFIG_BOOTMODE_PAD,
|
|
MX28_PAD_LCD_D01__GPIO_1_1 | MUX_CONFIG_BOOTMODE_PAD,
|
|
MX28_PAD_LCD_D02__GPIO_1_2 | MUX_CONFIG_BOOTMODE_PAD,
|
|
MX28_PAD_LCD_D03__GPIO_1_3 | MUX_CONFIG_BOOTMODE_PAD,
|
|
MX28_PAD_LCD_D04__GPIO_1_4 | MUX_CONFIG_BOOTMODE_PAD,
|
|
MX28_PAD_LCD_D05__GPIO_1_5 | MUX_CONFIG_BOOTMODE_PAD,
|
|
};
|
|
|
|
uint8_t mx28_get_bootmode_index(void)
|
|
{
|
|
uint8_t bootmode = 0;
|
|
int i;
|
|
uint8_t masked;
|
|
|
|
/* 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(MX28_PAD_LCD_D00__GPIO_1_0);
|
|
gpio_direction_input(MX28_PAD_LCD_D01__GPIO_1_1);
|
|
gpio_direction_input(MX28_PAD_LCD_D02__GPIO_1_2);
|
|
gpio_direction_input(MX28_PAD_LCD_D03__GPIO_1_3);
|
|
gpio_direction_input(MX28_PAD_LCD_D04__GPIO_1_4);
|
|
gpio_direction_input(MX28_PAD_LCD_D05__GPIO_1_5);
|
|
|
|
/* Read bootmode pads */
|
|
bootmode |= (gpio_get_value(MX28_PAD_LCD_D00__GPIO_1_0) ? 1 : 0) << 0;
|
|
bootmode |= (gpio_get_value(MX28_PAD_LCD_D01__GPIO_1_1) ? 1 : 0) << 1;
|
|
bootmode |= (gpio_get_value(MX28_PAD_LCD_D02__GPIO_1_2) ? 1 : 0) << 2;
|
|
bootmode |= (gpio_get_value(MX28_PAD_LCD_D03__GPIO_1_3) ? 1 : 0) << 3;
|
|
bootmode |= (gpio_get_value(MX28_PAD_LCD_D04__GPIO_1_4) ? 1 : 0) << 4;
|
|
bootmode |= (gpio_get_value(MX28_PAD_LCD_D05__GPIO_1_5) ? 1 : 0) << 5;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(mx28_boot_modes); i++) {
|
|
masked = bootmode & mx28_boot_modes[i].boot_mask;
|
|
if (masked == mx28_boot_modes[i].boot_pads)
|
|
break;
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
void mx28_common_spl_init(const iomux_cfg_t *iomux_setup,
|
|
const unsigned int iomux_size)
|
|
{
|
|
struct mx28_spl_data *data = (struct mx28_spl_data *)
|
|
((CONFIG_SYS_TEXT_BASE - sizeof(struct mx28_spl_data)) & ~0xf);
|
|
uint8_t bootmode = mx28_get_bootmode_index();
|
|
|
|
mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size);
|
|
mx28_power_init();
|
|
|
|
mx28_mem_init();
|
|
data->mem_dram_size = mx28_mem_get_size();
|
|
|
|
data->boot_mode_idx = bootmode;
|
|
|
|
mx28_power_wait_pswitch();
|
|
}
|
|
|
|
/* Support aparatus */
|
|
inline void board_init_f(unsigned long bootflag)
|
|
{
|
|
for (;;)
|
|
;
|
|
}
|
|
|
|
inline void board_init_r(gd_t *id, ulong dest_addr)
|
|
{
|
|
for (;;)
|
|
;
|
|
}
|
|
|
|
#ifndef CONFIG_SPL_SERIAL_SUPPORT
|
|
void serial_putc(const char c) {}
|
|
void serial_puts(const char *s) {}
|
|
#endif
|
|
void hang(void) __attribute__ ((noreturn));
|
|
void hang(void)
|
|
{
|
|
for (;;)
|
|
;
|
|
}
|