board/sx1/sx1.c

   1 /*
   2  * (C) Copyright 2004
   3  * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
   4  *
   5  * (C) Copyright 2003
   6  * Texas Instruments, <www.ti.com>
   7  * Kshitij Gupta <Kshitij@ti.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 #include <common.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 static void flash__init (void);
  33 static void ether__init (void);
  34
  35 static inline void delay (unsigned long loops)
  36 {
  37         __asm__ volatile ("1:\n"
  38                           "subs %0, %1, #1\n"
  39                           "bne 1b":"=r" (loops):"0" (loops));
  40 }
  41
  42 /*
  43  * Miscellaneous platform dependent initialisations
  44  */
  45
  46 int board_init (void)
  47 {
  48         /* arch number of SX1 Board */
  49         gd->bd->bi_arch_number = MACH_TYPE_SX1;
  50
  51         /* adress of boot parameters */
  52         gd->bd->bi_boot_params = 0x10000100;
  53
  54 /* kk - this speeds up your boot a quite a bit.  However to make it
  55  *  work, you need make sure your kernel startup flush bug is fixed.
  56  *  ... rkw ...
  57  */
  58         icache_enable ();
  59
  60         flash__init ();
  61         ether__init ();
  62         return 0;
  63 }
  64
  65
  66 int misc_init_r (void)
  67 {
  68         /* volatile ushort *gdir = (ushort *) (GPIO_DIR_CONTROL_REG); */
  69         /* volatile ushort *mdir = (ushort *) (MPUIO_DIR_CONTROL_REG); */
  70
  71         /* setup gpio direction to match board (no floats!) */
  72         /**gdir = 0xCFF9; */
  73         /**mdir = 0x103F; */
  74
  75         return (0);
  76 }
  77
  78 /******************************
  79  Routine:
  80  Description:
  81 ******************************/
  82 static void flash__init (void)
  83 {
  84 #define CS0_CHIP_SELECT_REG 0xfffecc10
  85 #define CS3_CHIP_SELECT_REG 0xfffecc1c
  86 #define EMIFS_GlB_Config_REG 0xfffecc0c
  87
  88         unsigned int regval;
  89
  90         regval = *((volatile unsigned int *) EMIFS_GlB_Config_REG);
  91         regval = regval | 0x0001;       /* Turn off write protection for flash devices. */
  92         if (regval & 0x0002) {
  93                 regval = regval & 0xfffd;       /* Swap CS0 and CS3 so that flash is visible at 0x0 and eeprom at 0x0c000000. */
  94                 /* If, instead, you want to reference flash at 0x0c000000, then it seemed the following were necessary. */
  95                 /* *((volatile unsigned int *)CS0_CHIP_SELECT_REG) = 0x202090; / * Overrides head.S setting of 0x212090 */
  96                 /* *((volatile unsigned int *)CS3_CHIP_SELECT_REG) = 0x202090; / * Let's flash chips be fully functional. */
  97         }
  98         *((volatile unsigned int *) EMIFS_GlB_Config_REG) = regval;
  99 }
 100
 101
 102 /******************************
 103  Routine:
 104  Description:
 105 ******************************/
 106 static void ether__init (void)
 107 {
 108 #define ETH_CONTROL_REG 0x0800000b
 109         /* take the Ethernet controller out of reset and wait
 110          * for the EEPROM load to complete.
 111          */
 112         *((volatile unsigned char *) ETH_CONTROL_REG) &= ~0x01;
 113         udelay (3);
 114 }
 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 }