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#include <errno.h>
  27
  28#ifndef CONFIG_SYS_NAND_BASE_LIST
  29#define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
  30#endif
  31
  32DECLARE_GLOBAL_DATA_PTR;
  33
  34int nand_curr_device = -1;
  35
  36
  37nand_info_t nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
  38
  39#ifndef CONFIG_SYS_NAND_SELF_INIT
  40static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
  41static ulong base_address[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST;
  42#endif
  43
  44static char dev_name[CONFIG_SYS_MAX_NAND_DEVICE][8];
  45
  46static unsigned long total_nand_size; /* in kiB */
  47
  48/* Register an initialized NAND mtd device with the U-Boot NAND command. */
  49int nand_register(int devnum)
  50{
  51        struct mtd_info *mtd;
  52
  53        if (devnum >= CONFIG_SYS_MAX_NAND_DEVICE)
  54                return -EINVAL;
  55
  56        mtd = &nand_info[devnum];
  57
  58        sprintf(dev_name[devnum], "nand%d", devnum);
  59        mtd->name = dev_name[devnum];
  60
  61#ifdef CONFIG_MTD_DEVICE
  62        /*
  63         * Add MTD device so that we can reference it later
  64         * via the mtdcore infrastructure (e.g. ubi).
  65         */
  66        add_mtd_device(mtd);
  67#endif
  68
  69        total_nand_size += mtd->size / 1024;
  70
  71        if (nand_curr_device == -1)
  72                nand_curr_device = devnum;
  73
  74        return 0;
  75}
  76
  77#ifndef CONFIG_SYS_NAND_SELF_INIT
  78static void nand_init_chip(int i)
  79{
  80        struct mtd_info *mtd = &nand_info[i];
  81        struct nand_chip *nand = &nand_chip[i];
  82        ulong base_addr = base_address[i];
  83        int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
  84
  85        if (maxchips < 1)
  86                maxchips = 1;
  87
  88        mtd->priv = nand;
  89        nand->IO_ADDR_R = nand->IO_ADDR_W = (void  __iomem *)base_addr;
  90
  91        if (board_nand_init(nand))
  92                return;
  93
  94        if (nand_scan(mtd, maxchips))
  95                return;
  96
  97        nand_register(i);
  98}
  99#endif
 100
 101void nand_init(void)
 102{
 103#ifdef CONFIG_SYS_NAND_SELF_INIT
 104        board_nand_init();
 105#else
 106        int i;
 107
 108        for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
 109                nand_init_chip(i);
 110#endif
 111
 112        printf("%lu MiB\n", total_nand_size / 1024);
 113
 114#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 115        /*
 116         * Select the chip in the board/cpu specific driver
 117         */
 118        board_nand_select_device(nand_info[nand_curr_device].priv, nand_curr_device);
 119#endif
 120}
 121