drivers/mtd/onenand/onenand_uboot.c

   1 /*
   2  *  drivers/mtd/onenand/onenand_uboot.c
   3  *
   4  *  Copyright (C) 2005-2008 Samsung Electronics
   5  *  Kyungmin Park <kyungmin.park@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 /*
  13  * OneNAND initialization at U-Boot
  14  */
  15
  16 #include <common.h>
  17 #include <linux/compat.h>
  18 #include <linux/mtd/mtd.h>
  19 #include <linux/mtd/onenand.h>
  20
  21 struct mtd_info onenand_mtd;
  22 struct onenand_chip onenand_chip;
  23 static __attribute__((unused)) char dev_name[] = "onenand0";
  24
  25 void onenand_init(void)
  26 {
  27         int err = 0;
  28         memset(&onenand_mtd, 0, sizeof(struct mtd_info));
  29         memset(&onenand_chip, 0, sizeof(struct onenand_chip));
  30
  31         onenand_mtd.priv = &onenand_chip;
  32
  33 #ifdef CONFIG_USE_ONENAND_BOARD_INIT
  34         /* It's used for some board init required */
  35         err = onenand_board_init(&onenand_mtd);
  36 #else
  37         onenand_chip.base = (void *) CONFIG_SYS_ONENAND_BASE;
  38 #endif
  39
  40         if (!err && !(onenand_scan(&onenand_mtd, 1))) {
  41
  42                 if (onenand_chip.device_id & DEVICE_IS_FLEXONENAND)
  43                         puts("Flex-");
  44                 puts("OneNAND: ");
  45
  46 #ifdef CONFIG_MTD_DEVICE
  47                 /*
  48                  * Add MTD device so that we can reference it later
  49                  * via the mtdcore infrastructure (e.g. ubi).
  50                  */
  51                 onenand_mtd.name = dev_name;
  52                 add_mtd_device(&onenand_mtd);
  53 #endif
  54         }
  55         print_size(onenand_chip.chipsize, "\n");
  56 }