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
  31DECLARE_GLOBAL_DATA_PTR;
  32
  33int nand_curr_device = -1;
  34nand_info_t nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
  35
  36static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
  37static ulong base_address[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST;
  38
  39static const char default_nand_name[] = "nand";
  40static __attribute__((unused)) char dev_name[CONFIG_SYS_MAX_NAND_DEVICE][8];
  41
  42static void nand_init_chip(struct mtd_info *mtd, struct nand_chip *nand,
  43                           ulong base_addr)
  44{
  45        int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
  46        static int __attribute__((unused)) i = 0;
  47
  48        if (maxchips < 1)
  49                maxchips = 1;
  50        mtd->priv = nand;
  51
  52        nand->IO_ADDR_R = nand->IO_ADDR_W = (void  __iomem *)base_addr;
  53        if (board_nand_init(nand) == 0) {
  54                if (nand_scan(mtd, maxchips) == 0) {
  55                        if (!mtd->name)
  56                                mtd->name = (char *)default_nand_name;
  57#ifdef CONFIG_NEEDS_MANUAL_RELOC
  58                        else
  59                                mtd->name += gd->reloc_off;
  60#endif
  61
  62#ifdef CONFIG_MTD_DEVICE
  63                        /*
  64                         * Add MTD device so that we can reference it later
  65                         * via the mtdcore infrastructure (e.g. ubi).
  66                         */
  67                        sprintf(dev_name[i], "nand%d", i);
  68                        mtd->name = dev_name[i++];
  69                        add_mtd_device(mtd);
  70#endif
  71                } else
  72                        mtd->name = NULL;
  73        } else {
  74                mtd->name = NULL;
  75                mtd->size = 0;
  76        }
  77
  78}
  79
  80void nand_init(void)
  81{
  82        int i;
  83        unsigned int size = 0;
  84        for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
  85                nand_init_chip(&nand_info[i], &nand_chip[i], base_address[i]);
  86                size += nand_info[i].size / 1024;
  87                if (nand_curr_device == -1)
  88                        nand_curr_device = i;
  89        }
  90        printf("%u MiB\n", size / 1024);
  91
  92#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
  93        /*
  94         * Select the chip in the board/cpu specific driver
  95         */
  96        board_nand_select_device(nand_info[nand_curr_device].priv, nand_curr_device);
  97#endif
  98}
  99