LXR uboot/drivers/mtd/nand/nand.c

   1/*
   2 * (C) Copyright 2005
   3 * 2N Telekomunikace, a.s. <www.2n.cz>
   4 * Ladislav Michl <michl@2n.cz>
   5 *
   6 * See file CREDITS for list of people who contributed to this
   7 * project.
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License
  11 * version 2 as published by the Free Software Foundation.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <common.h>
  25#include <nand.h>
  26
  27#ifndef CONFIG_SYS_NAND_BASE_LIST
  28#define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
  29#endif
  30
  31int nand_curr_device = -1;
  32nand_info_t nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
  33
  34static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
  35static ulong base_address[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST;
  36
  37static const char default_nand_name[] = "nand";
  38
  39extern int board_nand_init(struct nand_chip *nand);
  40
  41static void nand_init_chip(struct mtd_info *mtd, struct nand_chip *nand,
  42                           ulong base_addr)
  43{
  44        mtd->priv = nand;
  45
  46        nand->IO_ADDR_R = nand->IO_ADDR_W = (void  __iomem *)base_addr;
  47        if (board_nand_init(nand) == 0) {
  48                if (nand_scan(mtd, 1) == 0) {
  49                        if (!mtd->name)
  50                                mtd->name = (char *)default_nand_name;
  51                } else
  52                        mtd->name = NULL;
  53        } else {
  54                mtd->name = NULL;
  55                mtd->size = 0;
  56        }
  57
  58}
  59
  60void nand_init(void)
  61{
  62        int i;
  63        unsigned int size = 0;
  64        for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
  65                nand_init_chip(&nand_info[i], &nand_chip[i], base_address[i]);
  66                size += nand_info[i].size / 1024;
  67                if (nand_curr_device == -1)
  68                        nand_curr_device = i;
  69        }
  70        printf("%u MiB\n", size / 1024);
  71
  72#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
  73        /*
  74         * Select the chip in the board/cpu specific driver
  75         */
  76        board_nand_select_device(nand_info[nand_curr_device].priv, nand_curr_device);
  77#endif
  78}
  79