board/netstar/nand.c

   1 /*
   2  * (C) Copyright 2005 2N TELEKOMUNIKACE, Ladislav Michl
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <common.h>
  24
  25 #if (CONFIG_COMMANDS & CFG_CMD_NAND) || defined(CONFIG_CMD_NAND)
  26
  27 #include <nand.h>
  28
  29 /*
  30  *      hardware specific access to control-lines
  31  */
  32 #define MASK_CLE        0x02
  33 #define MASK_ALE        0x04
  34
  35 static void netstar_nand_hwcontrol(struct mtd_info *mtd, int cmd)
  36 {
  37         struct nand_chip *this = mtd->priv;
  38         ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
  39
  40         IO_ADDR_W &= ~(MASK_ALE|MASK_CLE);
  41         switch (cmd) {
  42                 case NAND_CTL_SETCLE: IO_ADDR_W |= MASK_CLE; break;
  43                 case NAND_CTL_SETALE: IO_ADDR_W |= MASK_ALE; break;
  44         }
  45         this->IO_ADDR_W = (void *) IO_ADDR_W;
  46 }
  47
  48 /*
  49  *      chip R/B detection
  50  */
  51 /***
  52 static int netstar_nand_ready(struct mtd_info *mtd)
  53 {
  54         return (*(volatile ushort *)GPIO_DATA_INPUT_REG) & 0x02;
  55 }
  56 ***/
  57
  58 int board_nand_init(struct nand_chip *nand)
  59 {
  60         nand->options = NAND_SAMSUNG_LP_OPTIONS;
  61         nand->eccmode = NAND_ECC_SOFT;
  62         nand->hwcontrol = netstar_nand_hwcontrol;
  63 /*      nand->dev_ready = netstar_nand_ready; */
  64         nand->chip_delay = 18;
  65         return 0;
  66 }
  67 #endif