LXR uboot/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
  43static 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
  54static 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
  63int 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
  80int 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
  91int checkboard(void)
  92{
  93        printf("Board:   SMDK6400\n");
  94        return 0;
  95}
  96#endif
  97
  98#ifdef CONFIG_ENABLE_MMU
  99ulong 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>
 112extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE];
 113void 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
 121ulong 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}
 131