LXR uboot/board/innokom/innokom.c

   1/*
   2 * (C) Copyright 2002
   3 * Robert Schwebel, Pengutronix, r.schwebel@pengutronix.de
   4 * Kyle Harris, Nexus Technologies, Inc., kharris@nexus-tech.net
   5 * Marius Groeger, Sysgo Real-Time Solutions GmbH, mgroeger@sysgo.de
   6 *
   7 * See file CREDITS for list of people who contributed to this
   8 * project.
   9 *
  10 * This program is free software; you can redistribute it and/or
  11 * modify it under the terms of the GNU General Public License as
  12 * published by the Free Software Foundation; either version 2 of
  13 * the License, or (at your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 * GNU General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License
  21 * along with this program; if not, write to the Free Software
  22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23 * MA 02111-1307 USA
  24 */
  25
  26#include <common.h>
  27#include <asm/arch/pxa-regs.h>
  28#include <asm/mach-types.h>
  29
  30DECLARE_GLOBAL_DATA_PTR;
  31
  32#ifdef CONFIG_SHOW_BOOT_PROGRESS
  33# define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
  34#else
  35# define SHOW_BOOT_PROGRESS(arg)
  36#endif
  37
  38/**
  39 * i2c_init_board - reset i2c bus. When the board is powercycled during a
  40 * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
  41 * The Innokom board has GPIO70 connected to SCLK which can be toggled
  42 * until all chips think that their current cycles are finished.
  43 */
  44int i2c_init_board(void)
  45{
  46        int i, icr;
  47
  48        /* disable I2C controller first, otherwhise it thinks we want to    */
  49        /* talk to the slave port...                                        */
  50        icr = ICR; ICR &= ~(ICR_SCLE | ICR_IUE);
  51
  52        /* set gpio pin low _before_ we change direction to output          */
  53        GPCR(70) = GPIO_bit(70);
  54
  55        /* now toggle between output=low and high-impedance                 */
  56        for (i = 0; i < 20; i++) {
  57                GPDR(70) |= GPIO_bit(70);  /* output */
  58                udelay(10);
  59                GPDR(70) &= ~GPIO_bit(70); /* input  */
  60                udelay(10);
  61        }
  62
  63        ICR = icr;
  64
  65        return 0;
  66}
  67
  68
  69/**
  70 * misc_init_r: - misc initialisation routines
  71 */
  72
  73int misc_init_r(void)
  74{
  75        char *str;
  76
  77        /* determine if the software update key is pressed during startup   */
  78        if (GPLR0 & 0x00000800) {
  79                printf("using bootcmd_normal (sw-update button not pressed)\n");
  80                str = getenv("bootcmd_normal");
  81        } else {
  82                printf("using bootcmd_update (sw-update button pressed)\n");
  83                str = getenv("bootcmd_update");
  84        }
  85
  86        setenv("bootcmd",str);
  87
  88        return 0;
  89}
  90
  91
  92/**
  93 * board_init: - setup some data structures
  94 *
  95 * @return: 0 in case of success
  96 */
  97
  98int board_init (void)
  99{
 100        /* memory and cpu-speed are setup before relocation */
 101        /* so we do _nothing_ here */
 102
 103        gd->bd->bi_arch_number = MACH_TYPE_INNOKOM;
 104        gd->bd->bi_boot_params = 0xa0000100;
 105        gd->bd->bi_baudrate = CONFIG_BAUDRATE;
 106
 107        return 0;
 108}
 109
 110
 111/**
 112 * dram_init: - setup dynamic RAM
 113 *
 114 * @return: 0 in case of success
 115 */
 116
 117int dram_init (void)
 118{
 119        gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
 120        gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
 121
 122        return 0;
 123}
 124
 125
 126/**
 127 * innokom_set_led: - switch LEDs on or off
 128 *
 129 * @param led:   LED to switch (0,1,2)
 130 * @param state: switch on (1) or off (0)
 131 */
 132
 133void innokom_set_led(int led, int state)
 134{
 135        switch(led) {
 136/*
 137                case 0: if (state==1) {
 138                                GPCR0 |= CSB226_USER_LED0;
 139                        } else if (state==0) {
 140                                GPSR0 |= CSB226_USER_LED0;
 141                        }
 142                        break;
 143
 144                case 1: if (state==1) {
 145                                GPCR0 |= CSB226_USER_LED1;
 146                        } else if (state==0) {
 147                                GPSR0 |= CSB226_USER_LED1;
 148                        }
 149                        break;
 150
 151                case 2: if (state==1) {
 152                                GPCR0 |= CSB226_USER_LED2;
 153                        } else if (state==0) {
 154                                GPSR0 |= CSB226_USER_LED2;
 155                        }
 156                        break;
 157*/
 158        }
 159
 160        return;
 161}
 162
 163
 164/**
 165 * show_boot_progress: - indicate state of the boot process
 166 *
 167 * @param status: Status number - see README for details.
 168 *
 169 * The CSB226 does only have 3 LEDs, so we switch them on at the most
 170 * important states (1, 5, 15).
 171 */
 172
 173void show_boot_progress (int status)
 174{
 175        switch(status) {
 176/*
 177                case  1: csb226_set_led(0,1); break;
 178                case  5: csb226_set_led(1,1); break;
 179                case 15: csb226_set_led(2,1); break;
 180*/
 181        }
 182
 183        return;
 184}
 185