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nand.h

/*
 * mach-davinci/nand.h
 *
 * Copyright © 2006 Texas Instruments.
 *
 * Ported to 2.6.23 Copyright © 2008 by
 *   Sander Huijsen <Shuijsen@optelecom-nkf.com>
 *   Troy Kisky <troy.kisky@boundarydevices.com>
 *   Dirk Behme <Dirk.Behme@gmail.com>
 *
 * --------------------------------------------------------------------------
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __ARCH_ARM_DAVINCI_NAND_H
#define __ARCH_ARM_DAVINCI_NAND_H

#include <linux/mtd/nand.h>

#define NANDFCR_OFFSET        0x60
#define NANDFSR_OFFSET        0x64
#define NANDF1ECC_OFFSET      0x70

/* 4-bit ECC syndrome registers */
#define NAND_4BIT_ECC_LOAD_OFFSET   0xbc
#define NAND_4BIT_ECC1_OFFSET       0xc0
#define NAND_4BIT_ECC2_OFFSET       0xc4
#define NAND_4BIT_ECC3_OFFSET       0xc8
#define NAND_4BIT_ECC4_OFFSET       0xcc
#define NAND_ERR_ADD1_OFFSET        0xd0
#define NAND_ERR_ADD2_OFFSET        0xd4
#define NAND_ERR_ERRVAL1_OFFSET           0xd8
#define NAND_ERR_ERRVAL2_OFFSET           0xdc

/* NOTE:  boards don't need to use these address bits
 * for ALE/CLE unless they support booting from NAND.
 * They're used unless platform data overrides them.
 */
#define     MASK_ALE          0x08
#define     MASK_CLE          0x10

00055 struct davinci_nand_pdata {         /* platform_data */
      uint32_t          mask_ale;
      uint32_t          mask_cle;

      /* for packages using two chipselects */
      uint32_t          mask_chipsel;

      /* board's default static partition info */
      struct mtd_partition    *parts;
      unsigned          nr_parts;

      /* none  == NAND_ECC_NONE (strongly *not* advised!!)
       * soft  == NAND_ECC_SOFT
       * else  == NAND_ECC_HW, according to ecc_bits
       *
       * All DaVinci-family chips support 1-bit hardware ECC.
       * Newer ones also support 4-bit ECC, but are awkward
       * using it with large page chips.
       */
      nand_ecc_modes_t  ecc_mode;
      u8                ecc_bits;

      /* e.g. NAND_BUSWIDTH_16 or NAND_USE_FLASH_BBT */
      unsigned          options;

      /* Main and mirror bbt descriptor overrides */
      struct nand_bbt_descr   *bbt_td;
      struct nand_bbt_descr   *bbt_md;

      /* Access timings */
      struct davinci_aemif_timing   *timing;
};

#endif      /* __ARCH_ARM_DAVINCI_NAND_H */

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