release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-davinci/include/mach/nand.h

   1 /*
   2  * mach-davinci/nand.h
   3  *
   4  * Copyright © 2006 Texas Instruments.
   5  *
   6  * Ported to 2.6.23 Copyright © 2008 by
   7  *   Sander Huijsen <Shuijsen@optelecom-nkf.com>
   8  *   Troy Kisky <troy.kisky@boundarydevices.com>
   9  *   Dirk Behme <Dirk.Behme@gmail.com>
  10  *
  11  * --------------------------------------------------------------------------
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #ifndef __ARCH_ARM_DAVINCI_NAND_H
  29 #define __ARCH_ARM_DAVINCI_NAND_H
  30
  31 #include <linux/mtd/nand.h>
  32
  33 #define NRCSR_OFFSET            0x00
  34 #define AWCCR_OFFSET            0x04
  35 #define A1CR_OFFSET             0x10
  36 #define NANDFCR_OFFSET          0x60
  37 #define NANDFSR_OFFSET          0x64
  38 #define NANDF1ECC_OFFSET        0x70
  39
  40 /* 4-bit ECC syndrome registers */
  41 #define NAND_4BIT_ECC_LOAD_OFFSET       0xbc
  42 #define NAND_4BIT_ECC1_OFFSET           0xc0
  43 #define NAND_4BIT_ECC2_OFFSET           0xc4
  44 #define NAND_4BIT_ECC3_OFFSET           0xc8
  45 #define NAND_4BIT_ECC4_OFFSET           0xcc
  46 #define NAND_ERR_ADD1_OFFSET            0xd0
  47 #define NAND_ERR_ADD2_OFFSET            0xd4
  48 #define NAND_ERR_ERRVAL1_OFFSET         0xd8
  49 #define NAND_ERR_ERRVAL2_OFFSET         0xdc
  50
  51 /* NOTE:  boards don't need to use these address bits
  52  * for ALE/CLE unless they support booting from NAND.
  53  * They're used unless platform data overrides them.
  54  */
  55 #define MASK_ALE                0x08
  56 #define MASK_CLE                0x10
  57
  58 struct davinci_nand_pdata {             /* platform_data */
  59         uint32_t                mask_ale;
  60         uint32_t                mask_cle;
  61
  62         /* for packages using two chipselects */
  63         uint32_t                mask_chipsel;
  64
  65         /* board's default static partition info */
  66         struct mtd_partition    *parts;
  67         unsigned                nr_parts;
  68
  69         /* none  == NAND_ECC_NONE (strongly *not* advised!!)
  70          * soft  == NAND_ECC_SOFT
  71          * else  == NAND_ECC_HW, according to ecc_bits
  72          *
  73          * All DaVinci-family chips support 1-bit hardware ECC.
  74          * Newer ones also support 4-bit ECC, but are awkward
  75          * using it with large page chips.
  76          */
  77         nand_ecc_modes_t        ecc_mode;
  78         u8                      ecc_bits;
  79
  80         /* e.g. NAND_BUSWIDTH_16 or NAND_USE_FLASH_BBT */
  81         unsigned                options;
  82
  83         /* Main and mirror bbt descriptor overrides */
  84         struct nand_bbt_descr   *bbt_td;
  85         struct nand_bbt_descr   *bbt_md;
  86 };
  87
  88 #endif  /* __ARCH_ARM_DAVINCI_NAND_H */