mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-26 21:13:48 +00:00
184 lines
4.1 KiB
C
184 lines
4.1 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Robert Schwebel, Pengutronix, r.schwebel@pengutronix.de
|
|
* Kyle Harris, Nexus Technologies, Inc., kharris@nexus-tech.net
|
|
* Marius Groeger, Sysgo Real-Time Solutions GmbH, mgroeger@sysgo.de
|
|
*
|
|
* 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 <asm/arch/pxa-regs.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#ifdef CONFIG_SHOW_BOOT_PROGRESS
|
|
# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
|
|
#else
|
|
# define SHOW_BOOT_PROGRESS(arg)
|
|
#endif
|
|
|
|
/**
|
|
* i2c_init_board - reset i2c bus. When the board is powercycled during a
|
|
* bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
|
|
* The Innokom board has GPIO70 connected to SCLK which can be toggled
|
|
* until all chips think that their current cycles are finished.
|
|
*/
|
|
int i2c_init_board(void)
|
|
{
|
|
int i, icr;
|
|
|
|
/* disable I2C controller first, otherwhise it thinks we want to */
|
|
/* talk to the slave port... */
|
|
icr = ICR; ICR &= ~(ICR_SCLE | ICR_IUE);
|
|
|
|
/* set gpio pin low _before_ we change direction to output */
|
|
GPCR(70) = GPIO_bit(70);
|
|
|
|
/* now toggle between output=low and high-impedance */
|
|
for (i = 0; i < 20; i++) {
|
|
GPDR(70) |= GPIO_bit(70); /* output */
|
|
udelay(10);
|
|
GPDR(70) &= ~GPIO_bit(70); /* input */
|
|
udelay(10);
|
|
}
|
|
|
|
ICR = icr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* misc_init_r: - misc initialisation routines
|
|
*/
|
|
|
|
int misc_init_r(void)
|
|
{
|
|
char *str;
|
|
|
|
/* determine if the software update key is pressed during startup */
|
|
if (GPLR0 & 0x00000800) {
|
|
printf("using bootcmd_normal (sw-update button not pressed)\n");
|
|
str = getenv("bootcmd_normal");
|
|
} else {
|
|
printf("using bootcmd_update (sw-update button pressed)\n");
|
|
str = getenv("bootcmd_update");
|
|
}
|
|
|
|
setenv("bootcmd",str);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* board_init: - setup some data structures
|
|
*
|
|
* @return: 0 in case of success
|
|
*/
|
|
|
|
int board_init (void)
|
|
{
|
|
/* memory and cpu-speed are setup before relocation */
|
|
/* so we do _nothing_ here */
|
|
|
|
gd->bd->bi_arch_number = MACH_TYPE_INNOKOM;
|
|
gd->bd->bi_boot_params = 0xa0000100;
|
|
gd->bd->bi_baudrate = CONFIG_BAUDRATE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* dram_init: - setup dynamic RAM
|
|
*
|
|
* @return: 0 in case of success
|
|
*/
|
|
|
|
int dram_init (void)
|
|
{
|
|
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
|
|
gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* innokom_set_led: - switch LEDs on or off
|
|
*
|
|
* @param led: LED to switch (0,1,2)
|
|
* @param state: switch on (1) or off (0)
|
|
*/
|
|
|
|
void innokom_set_led(int led, int state)
|
|
{
|
|
switch(led) {
|
|
/*
|
|
case 0: if (state==1) {
|
|
GPCR0 |= CSB226_USER_LED0;
|
|
} else if (state==0) {
|
|
GPSR0 |= CSB226_USER_LED0;
|
|
}
|
|
break;
|
|
|
|
case 1: if (state==1) {
|
|
GPCR0 |= CSB226_USER_LED1;
|
|
} else if (state==0) {
|
|
GPSR0 |= CSB226_USER_LED1;
|
|
}
|
|
break;
|
|
|
|
case 2: if (state==1) {
|
|
GPCR0 |= CSB226_USER_LED2;
|
|
} else if (state==0) {
|
|
GPSR0 |= CSB226_USER_LED2;
|
|
}
|
|
break;
|
|
*/
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/**
|
|
* show_boot_progress: - indicate state of the boot process
|
|
*
|
|
* @param status: Status number - see README for details.
|
|
*
|
|
* The CSB226 does only have 3 LEDs, so we switch them on at the most
|
|
* important states (1, 5, 15).
|
|
*/
|
|
|
|
void show_boot_progress (int status)
|
|
{
|
|
switch(status) {
|
|
/*
|
|
case 1: csb226_set_led(0,1); break;
|
|
case 5: csb226_set_led(1,1); break;
|
|
case 15: csb226_set_led(2,1); break;
|
|
*/
|
|
}
|
|
|
|
return;
|
|
}
|