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 #ifdef CONFIG_SHOW_BOOT_PROGRESS
  31 # define SHOW_BOOT_PROGRESS(arg)        show_boot_progress(arg)
  32 #else
  33 # define SHOW_BOOT_PROGRESS(arg)
  34 #endif
  35
  36 /**
  37  * i2c_init_board - reset i2c bus. When the board is powercycled during a
  38  * bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
  39  * The Innokom board has GPIO70 connected to SCLK which can be toggled
  40  * until all chips think that their current cycles are finished.
  41  */
  42 int i2c_init_board(void)
  43 {
  44         int i, icr;
  45
  46         /* disable I2C controller first, otherwhise it thinks we want to    */
  47         /* talk to the slave port...                                        */
  48         icr = ICR; ICR &= ~(ICR_SCLE | ICR_IUE);
  49
  50         /* set gpio pin low _before_ we change direction to output          */
  51         GPCR(70) = GPIO_bit(70);
  52
  53         /* now toggle between output=low and high-impedance                 */
  54         for (i = 0; i < 20; i++) {
  55                 GPDR(70) |= GPIO_bit(70);  /* output */
  56                 udelay(10);
  57                 GPDR(70) &= ~GPIO_bit(70); /* input  */
  58                 udelay(10);
  59         }
  60
  61         ICR = icr;
  62
  63         return 0;
  64 }
  65
  66
  67 /**
  68  * misc_init_r: - misc initialisation routines
  69  */
  70
  71 int misc_init_r(void)
  72 {
  73         uchar *str;
  74
  75         /* determine if the software update key is pressed during startup   */
  76         if (GPLR0 & 0x00000800) {
  77                 printf("using bootcmd_normal (sw-update button not pressed)\n");
  78                 str = getenv("bootcmd_normal");
  79         } else {
  80                 printf("using bootcmd_update (sw-update button pressed)\n");
  81                 str = getenv("bootcmd_update");
  82         }
  83
  84         setenv("bootcmd",str);
  85
  86         return 0;
  87 }
  88
  89
  90 /**
  91  * board_init: - setup some data structures
  92  *
  93  * @return: 0 in case of success
  94  */
  95
  96 int board_init (void)
  97 {
  98         DECLARE_GLOBAL_DATA_PTR;
  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         DECLARE_GLOBAL_DATA_PTR;
 120
 121         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
 122         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
 123
 124         return 0;
 125 }
 126
 127
 128 /**
 129  * innokom_set_led: - switch LEDs on or off
 130  *
 131  * @param led:   LED to switch (0,1,2)
 132  * @param state: switch on (1) or off (0)
 133  */
 134
 135 void innokom_set_led(int led, int state)
 136 {
 137         switch(led) {
 138 /*
 139                 case 0: if (state==1) {
 140                                 GPCR0 |= CSB226_USER_LED0;
 141                         } else if (state==0) {
 142                                 GPSR0 |= CSB226_USER_LED0;
 143                         }
 144                         break;
 145
 146                 case 1: if (state==1) {
 147                                 GPCR0 |= CSB226_USER_LED1;
 148                         } else if (state==0) {
 149                                 GPSR0 |= CSB226_USER_LED1;
 150                         }
 151                         break;
 152
 153                 case 2: if (state==1) {
 154                                 GPCR0 |= CSB226_USER_LED2;
 155                         } else if (state==0) {
 156                                 GPSR0 |= CSB226_USER_LED2;
 157                         }
 158                         break;
 159 */
 160         }
 161
 162         return;
 163 }
 164
 165
 166 /**
 167  * show_boot_progress: - indicate state of the boot process
 168  *
 169  * @param status: Status number - see README for details.
 170  *
 171  * The CSB226 does only have 3 LEDs, so we switch them on at the most
 172  * important states (1, 5, 15).
 173  */
 174
 175 void show_boot_progress (int status)
 176 {
 177         switch(status) {
 178 /*
 179                 case  1: csb226_set_led(0,1); break;
 180                 case  5: csb226_set_led(1,1); break;
 181                 case 15: csb226_set_led(2,1); break;
 182 */
 183         }
 184
 185         return;
 186 }