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 CFG_NAND_BASE_LIST
  28 #define CFG_NAND_BASE_LIST { CFG_NAND_BASE }
  29 #endif
  30
  31 int nand_curr_device = -1;
  32 nand_info_t nand_info[CFG_MAX_NAND_DEVICE];
  33
  34 static struct nand_chip nand_chip[CFG_MAX_NAND_DEVICE];
  35 static ulong base_address[CFG_MAX_NAND_DEVICE] = CFG_NAND_BASE_LIST;
  36
  37 static const char default_nand_name[] = "nand";
  38
  39 extern int board_nand_init(struct nand_chip *nand);
  40
  41 static 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
  60 void nand_init(void)
  61 {
  62         int i;
  63         unsigned int size = 0;
  64         for (i = 0; i < CFG_MAX_NAND_DEVICE; i++) {
  65                 nand_init_chip(&nand_info[i], &nand_chip[i], base_address[i]);
  66                 size += nand_info[i].size;
  67                 if (nand_curr_device == -1)
  68                         nand_curr_device = i;
  69         }
  70         printf("%u MiB\n", size / (1024 * 1024));
  71
  72 #ifdef CFG_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 }