board/samsung/smdk6400/smdk6400.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * (C) Copyright 2002
   7  * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
   8  *
   9  * (C) Copyright 2008
  10  * Guennadi Liakhovetki, DENX Software Engineering, <lg@denx.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 <netdev.h>
  33 #include <asm/arch/s3c6400.h>
  34
  35 DECLARE_GLOBAL_DATA_PTR;
  36
  37 /* ------------------------------------------------------------------------- */
  38 #define CS8900_Tacs     0x0     /* 0clk         address set-up          */
  39 #define CS8900_Tcos     0x4     /* 4clk         chip selection set-up   */
  40 #define CS8900_Tacc     0xE     /* 14clk        access cycle            */
  41 #define CS8900_Tcoh     0x1     /* 1clk         chip selection hold     */
  42 #define CS8900_Tah      0x4     /* 4clk         address holding time    */
  43 #define CS8900_Tacp     0x6     /* 6clk         page mode access cycle  */
  44 #define CS8900_PMC      0x0     /* normal(1data)page mode configuration */
  45
  46 static inline void delay(unsigned long loops)
  47 {
  48         __asm__ volatile ("1:\n" "subs %0, %1, #1\n"
  49                           "bne 1b"
  50                           : "=r" (loops) : "0" (loops));
  51 }
  52
  53 /*
  54  * Miscellaneous platform dependent initialisations
  55  */
  56
  57 static void cs8900_pre_init(void)
  58 {
  59         SROM_BW_REG &= ~(0xf << 4);
  60         SROM_BW_REG |= (1 << 7) | (1 << 6) | (1 << 4);
  61         SROM_BC1_REG = ((CS8900_Tacs << 28) + (CS8900_Tcos << 24) +
  62                         (CS8900_Tacc << 16) + (CS8900_Tcoh << 12) +
  63                         (CS8900_Tah << 8) + (CS8900_Tacp << 4) + CS8900_PMC);
  64 }
  65
  66 int board_init(void)
  67 {
  68         cs8900_pre_init();
  69
  70         /* NOR-flash in SROM0 */
  71
  72         /* Enable WAIT */
  73         SROM_BW_REG |= 4 | 8 | 1;
  74
  75         gd->bd->bi_arch_number = MACH_TYPE;
  76         gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
  77
  78         return 0;
  79 }
  80
  81 int dram_init(void)
  82 {
  83         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  84         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
  85
  86         return 0;
  87 }
  88
  89 #ifdef CONFIG_DISPLAY_BOARDINFO
  90 int checkboard(void)
  91 {
  92         printf("Board:   SMDK6400\n");
  93         return 0;
  94 }
  95 #endif
  96
  97 #ifdef CONFIG_ENABLE_MMU
  98 ulong virt_to_phy_smdk6400(ulong addr)
  99 {
 100         if ((0xc0000000 <= addr) && (addr < 0xc8000000))
 101                 return addr - 0xc0000000 + 0x50000000;
 102         else
 103                 printf("do not support this address : %08lx\n", addr);
 104
 105         return addr;
 106 }
 107 #endif
 108
 109 ulong board_flash_get_legacy (ulong base, int banknum, flash_info_t *info)
 110 {
 111         if (banknum == 0) {     /* non-CFI boot flash */
 112                 info->portwidth = FLASH_CFI_16BIT;
 113                 info->chipwidth = FLASH_CFI_BY16;
 114                 info->interface = FLASH_CFI_X16;
 115                 return 1;
 116         } else
 117                 return 0;
 118 }
 119
 120 #ifdef CONFIG_CMD_NET
 121 int board_eth_init(bd_t *bis)
 122 {
 123         int rc = 0;
 124 #ifdef CONFIG_CS8900
 125         rc = cs8900_initialize(0, CONFIG_CS8900_BASE);
 126 #endif
 127         return rc;
 128 }
 129 #endif