board/cm4008/cm4008.c

   1 /*
   2  * (C) Copyright 2005
   3  * Greg Ungerer, OpenGear Inc, <greg.ungerer@opengear.com>
   4  *
   5  * (C) Copyright 2002
   6  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
   7  *
   8  * (C) Copyright 2002
   9  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  10  * Marius Groeger <mgroeger@sysgo.de>
  11  *
  12  * See file CREDITS for list of people who contributed to this
  13  * project.
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of
  18  * the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  28  * MA 02111-1307 USA
  29  */
  30
  31 #include <common.h>
  32 #include <asm/arch/platform.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 /* ------------------------------------------------------------------------- */
  37
  38 #define ks8695_read(a)    *((volatile unsigned int *) (KS8695_IO_BASE+(a)))
  39 #define ks8695_write(a,b) *((volatile unsigned int *) (KS8695_IO_BASE+(a))) = (b)
  40
  41 /* ------------------------------------------------------------------------- */
  42
  43
  44 /*
  45  * Miscelaneous platform dependent initialisations
  46  */
  47 int env_flash_cmdline (void)
  48 {
  49         unsigned char *sp = (unsigned char *) 0x0201c020;
  50         unsigned char *ep;
  51         int len;
  52
  53         /* Check if "erase" push button is depressed */
  54         if ((ks8695_read(KS8695_GPIO_DATA) & 0x8) == 0) {
  55                 printf("### Entering network recovery mode...\n");
  56                 setenv("bootargs", "console=ttyAM0,115200 mem=16M initrd=0x400000,6M root=/dev/ram0");
  57                 setenv("bootcmd", "bootp 0x400000; gofsk 0x400000");
  58                 setenv("bootdelay", "2");
  59                 return 0;
  60         }
  61
  62         /* Check for flash based kernel boot args to use as default */
  63         for (ep = sp, len = 0; ((len < 1024) && (*ep != 0)); ep++, len++)
  64                 ;
  65
  66         if ((len > 0) && (len <1024))
  67                 setenv("bootargs", sp);
  68
  69         return 0;
  70 }
  71
  72 int board_late_init (void)
  73 {
  74         return 0;
  75 }
  76
  77
  78 int board_init (void)
  79 {
  80         /* arch number of CM4008 */
  81         gd->bd->bi_arch_number = 624;
  82
  83         /* adress of boot parameters */
  84         gd->bd->bi_boot_params = 0x00000100;
  85
  86         /* power down all but port 0 on the switch */
  87         ks8695_write(KS8695_SWITCH_LPPM12, 0x00000005);
  88         ks8695_write(KS8695_SWITCH_LPPM34, 0x00050005);
  89
  90         return 0;
  91 }
  92
  93 int dram_init (void)
  94 {
  95         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  96         gd->bd->bi_dram[0].size  = PHYS_SDRAM_1_SIZE;
  97
  98         return (0);
  99 }