LXR uboot/drivers/mtd/nand/nand

   1/*
   2 * Genericish driver for memory mapped NAND devices
   3 *
   4 * Copyright (c) 2006-2009 Analog Devices Inc.
   5 * Licensed under the GPL-2 or later.
   6 */
   7
   8/* Your board must implement the following macros:
   9 *  NAND_PLAT_WRITE_CMD(chip, cmd)
  10 *  NAND_PLAT_WRITE_ADR(chip, cmd)
  11 *  NAND_PLAT_INIT()
  12 *
  13 * It may also implement the following:
  14 *  NAND_PLAT_DEV_READY(chip)
  15 */
  16
  17#include <common.h>
  18#include <asm/io.h>
  19
  20#include <nand.h>
  21
  22static void plat_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
  23{
  24        struct nand_chip *this = mtd->priv;
  25
  26        if (cmd == NAND_CMD_NONE)
  27                return;
  28
  29        if (ctrl & NAND_CLE)
  30                NAND_PLAT_WRITE_CMD(this, cmd);
  31        else
  32                NAND_PLAT_WRITE_ADR(this, cmd);
  33}
  34
  35#ifdef NAND_PLAT_DEV_READY
  36static int plat_dev_ready(struct mtd_info *mtd)
  37{
  38        return NAND_PLAT_DEV_READY((struct nand_chip *)mtd->priv);
  39}
  40#else
  41# define plat_dev_ready NULL
  42#endif
  43
  44int board_nand_init(struct nand_chip *nand)
  45{
  46        NAND_PLAT_INIT();
  47
  48        nand->cmd_ctrl = plat_cmd_ctrl;
  49        nand->dev_ready = plat_dev_ready;
  50        nand->ecc.mode = NAND_ECC_SOFT;
  51
  52        return 0;
  53}
  54