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 NANDFCR_OFFSET          0x60
  34 #define NANDFSR_OFFSET          0x64
  35 #define NANDF1ECC_OFFSET        0x70
  36
  37 /* 4-bit ECC syndrome registers */
  38 #define NAND_4BIT_ECC_LOAD_OFFSET       0xbc
  39 #define NAND_4BIT_ECC1_OFFSET           0xc0
  40 #define NAND_4BIT_ECC2_OFFSET           0xc4
  41 #define NAND_4BIT_ECC3_OFFSET           0xc8
  42 #define NAND_4BIT_ECC4_OFFSET           0xcc
  43 #define NAND_ERR_ADD1_OFFSET            0xd0
  44 #define NAND_ERR_ADD2_OFFSET            0xd4
  45 #define NAND_ERR_ERRVAL1_OFFSET         0xd8
  46 #define NAND_ERR_ERRVAL2_OFFSET         0xdc
  47
  48 /* NOTE:  boards don't need to use these address bits
  49  * for ALE/CLE unless they support booting from NAND.
  50  * They're used unless platform data overrides them.
  51  */
  52 #define MASK_ALE                0x08
  53 #define MASK_CLE                0x10
  54
  55 struct davinci_nand_pdata {             /* platform_data */
  56         uint32_t                mask_ale;
  57         uint32_t                mask_cle;
  58
  59         /* for packages using two chipselects */
  60         uint32_t                mask_chipsel;
  61
  62         /* board's default static partition info */
  63         struct mtd_partition    *parts;
  64         unsigned                nr_parts;
  65
  66         /* none  == NAND_ECC_NONE (strongly *not* advised!!)
  67          * soft  == NAND_ECC_SOFT
  68          * else  == NAND_ECC_HW, according to ecc_bits
  69          *
  70          * All DaVinci-family chips support 1-bit hardware ECC.
  71          * Newer ones also support 4-bit ECC, but are awkward
  72          * using it with large page chips.
  73          */
  74         nand_ecc_modes_t        ecc_mode;
  75         u8                      ecc_bits;
  76
  77         /* e.g. NAND_BUSWIDTH_16 or NAND_USE_FLASH_BBT */
  78         unsigned                options;
  79
  80         /* Main and mirror bbt descriptor overrides */
  81         struct nand_bbt_descr   *bbt_td;
  82         struct nand_bbt_descr   *bbt_md;
  83
  84         /* Access timings */
  85         struct davinci_aemif_timing     *timing;
  86 };
  87
  88 #endif  /* __ARCH_ARM_DAVINCI_NAND_H */