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
  30 DECLARE_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  */
  44 int 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
  73 int misc_init_r(void)
  74 {
  75         uchar *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
  98 int 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
 117 int 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
 133 void 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
 173 void 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 }