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 <s3c6400.h>
  33
  34 /* ------------------------------------------------------------------------- */
  35 #define CS8900_Tacs     0x0     /* 0clk         address set-up          */
  36 #define CS8900_Tcos     0x4     /* 4clk         chip selection set-up   */
  37 #define CS8900_Tacc     0xE     /* 14clk        access cycle            */
  38 #define CS8900_Tcoh     0x1     /* 1clk         chip selection hold     */
  39 #define CS8900_Tah      0x4     /* 4clk         address holding time    */
  40 #define CS8900_Tacp     0x6     /* 6clk         page mode access cycle  */
  41 #define CS8900_PMC      0x0     /* normal(1data)page mode configuration */
  42
  43 static inline void delay(unsigned long loops)
  44 {
  45         __asm__ volatile ("1:\n" "subs %0, %1, #1\n"
  46                           "bne 1b"
  47                           : "=r" (loops) : "0" (loops));
  48 }
  49
  50 /*
  51  * Miscellaneous platform dependent initialisations
  52  */
  53
  54 static void cs8900_pre_init(void)
  55 {
  56         SROM_BW_REG &= ~(0xf << 4);
  57         SROM_BW_REG |= (1 << 7) | (1 << 6) | (1 << 4);
  58         SROM_BC1_REG = ((CS8900_Tacs << 28) + (CS8900_Tcos << 24) +
  59                         (CS8900_Tacc << 16) + (CS8900_Tcoh << 12) +
  60                         (CS8900_Tah << 8) + (CS8900_Tacp << 4) + CS8900_PMC);
  61 }
  62
  63 int board_init(void)
  64 {
  65         DECLARE_GLOBAL_DATA_PTR;
  66
  67         cs8900_pre_init();
  68
  69         /* NOR-flash in SROM0 */
  70
  71         /* Enable WAIT */
  72         SROM_BW_REG |= 4 | 8 | 1;
  73
  74         gd->bd->bi_arch_number = MACH_TYPE;
  75         gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
  76
  77         return 0;
  78 }
  79
  80 int dram_init(void)
  81 {
  82         DECLARE_GLOBAL_DATA_PTR;
  83
  84         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  85         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
  86
  87         return 0;
  88 }
  89
  90 #ifdef CONFIG_DISPLAY_BOARDINFO
  91 int checkboard(void)
  92 {
  93         printf("Board:   SMDK6400\n");
  94         return 0;
  95 }
  96 #endif
  97
  98 #ifdef CONFIG_ENABLE_MMU
  99 ulong virt_to_phy_smdk6400(ulong addr)
 100 {
 101         if ((0xc0000000 <= addr) && (addr < 0xc8000000))
 102                 return addr - 0xc0000000 + 0x50000000;
 103         else
 104                 printf("do not support this address : %08lx\n", addr);
 105
 106         return addr;
 107 }
 108 #endif
 109
 110 #if defined(CONFIG_CMD_NAND) && defined(CONFIG_SYS_NAND_LEGACY)
 111 #include <linux/mtd/nand.h>
 112 extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE];
 113 void nand_init(void)
 114 {
 115         nand_probe(CONFIG_SYS_NAND_BASE);
 116         if (nand_dev_desc[0].ChipID != NAND_ChipID_UNKNOWN)
 117                 print_size(nand_dev_desc[0].totlen, "\n");
 118 }
 119 #endif
 120
 121 ulong board_flash_get_legacy (ulong base, int banknum, flash_info_t *info)
 122 {
 123         if (banknum == 0) {     /* non-CFI boot flash */
 124                 info->portwidth = FLASH_CFI_16BIT;
 125                 info->chipwidth = FLASH_CFI_BY16;
 126                 info->interface = FLASH_CFI_X16;
 127                 return 1;
 128         } else
 129                 return 0;
 130 }