mirror of
https://github.com/AsahiLinux/u-boot
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184 lines
4.1 KiB
C
184 lines
4.1 KiB
C
/*
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* (C) Copyright 2002
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* Robert Schwebel, Pengutronix, r.schwebel@pengutronix.de
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* Kyle Harris, Nexus Technologies, Inc., kharris@nexus-tech.net
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* Marius Groeger, Sysgo Real-Time Solutions GmbH, mgroeger@sysgo.de
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/mach-types.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_SHOW_BOOT_PROGRESS
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# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
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#else
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# define SHOW_BOOT_PROGRESS(arg)
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#endif
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/**
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* i2c_init_board - reset i2c bus. When the board is powercycled during a
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* bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
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* The Innokom board has GPIO70 connected to SCLK which can be toggled
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* until all chips think that their current cycles are finished.
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*/
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int i2c_init_board(void)
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{
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int i, icr;
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/* disable I2C controller first, otherwhise it thinks we want to */
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/* talk to the slave port... */
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icr = ICR; ICR &= ~(ICR_SCLE | ICR_IUE);
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/* set gpio pin low _before_ we change direction to output */
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GPCR(70) = GPIO_bit(70);
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/* now toggle between output=low and high-impedance */
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for (i = 0; i < 20; i++) {
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GPDR(70) |= GPIO_bit(70); /* output */
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udelay(10);
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GPDR(70) &= ~GPIO_bit(70); /* input */
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udelay(10);
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}
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ICR = icr;
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return 0;
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}
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/**
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* misc_init_r: - misc initialisation routines
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*/
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int misc_init_r(void)
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{
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char *str;
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/* determine if the software update key is pressed during startup */
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if (GPLR0 & 0x00000800) {
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printf("using bootcmd_normal (sw-update button not pressed)\n");
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str = getenv("bootcmd_normal");
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} else {
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printf("using bootcmd_update (sw-update button pressed)\n");
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str = getenv("bootcmd_update");
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}
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setenv("bootcmd",str);
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return 0;
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}
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/**
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* board_init: - setup some data structures
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*
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* @return: 0 in case of success
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*/
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int board_init (void)
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{
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/* memory and cpu-speed are setup before relocation */
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/* so we do _nothing_ here */
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gd->bd->bi_arch_number = MACH_TYPE_INNOKOM;
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gd->bd->bi_boot_params = 0xa0000100;
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gd->bd->bi_baudrate = CONFIG_BAUDRATE;
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return 0;
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}
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/**
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* dram_init: - setup dynamic RAM
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*
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* @return: 0 in case of success
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*/
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int dram_init (void)
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{
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gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
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gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
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return 0;
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}
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/**
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* innokom_set_led: - switch LEDs on or off
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*
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* @param led: LED to switch (0,1,2)
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* @param state: switch on (1) or off (0)
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*/
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void innokom_set_led(int led, int state)
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{
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switch(led) {
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/*
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case 0: if (state==1) {
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GPCR0 |= CSB226_USER_LED0;
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} else if (state==0) {
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GPSR0 |= CSB226_USER_LED0;
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}
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break;
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case 1: if (state==1) {
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GPCR0 |= CSB226_USER_LED1;
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} else if (state==0) {
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GPSR0 |= CSB226_USER_LED1;
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}
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break;
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case 2: if (state==1) {
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GPCR0 |= CSB226_USER_LED2;
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} else if (state==0) {
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GPSR0 |= CSB226_USER_LED2;
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}
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break;
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*/
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}
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return;
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}
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/**
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* show_boot_progress: - indicate state of the boot process
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*
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* @param status: Status number - see README for details.
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*
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* The CSB226 does only have 3 LEDs, so we switch them on at the most
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* important states (1, 5, 15).
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*/
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void show_boot_progress (int status)
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{
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switch(status) {
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/*
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case 1: csb226_set_led(0,1); break;
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case 5: csb226_set_led(1,1); break;
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case 15: csb226_set_led(2,1); break;
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*/
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}
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return;
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}
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