include/linux/platform_data/mtd-davinci.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * mach-davinci/nand.h
   4  *
   5  * Copyright © 2006 Texas Instruments.
   6  *
   7  * Ported to 2.6.23 Copyright © 2008 by
   8  *   Sander Huijsen <Shuijsen@optelecom-nkf.com>
   9  *   Troy Kisky <troy.kisky@boundarydevices.com>
  10  *   Dirk Behme <Dirk.Behme@gmail.com>
  11  *
  12  * --------------------------------------------------------------------------
  13  */
  14
  15 #ifndef __ARCH_ARM_DAVINCI_NAND_H
  16 #define __ARCH_ARM_DAVINCI_NAND_H
  17
  18 #include <linux/mtd/rawnand.h>
  19
  20 #define NANDFCR_OFFSET          0x60
  21 #define NANDFSR_OFFSET          0x64
  22 #define NANDF1ECC_OFFSET        0x70
  23
  24 /* 4-bit ECC syndrome registers */
  25 #define NAND_4BIT_ECC_LOAD_OFFSET       0xbc
  26 #define NAND_4BIT_ECC1_OFFSET           0xc0
  27 #define NAND_4BIT_ECC2_OFFSET           0xc4
  28 #define NAND_4BIT_ECC3_OFFSET           0xc8
  29 #define NAND_4BIT_ECC4_OFFSET           0xcc
  30 #define NAND_ERR_ADD1_OFFSET            0xd0
  31 #define NAND_ERR_ADD2_OFFSET            0xd4
  32 #define NAND_ERR_ERRVAL1_OFFSET         0xd8
  33 #define NAND_ERR_ERRVAL2_OFFSET         0xdc
  34
  35 /* NOTE:  boards don't need to use these address bits
  36  * for ALE/CLE unless they support booting from NAND.
  37  * They're used unless platform data overrides them.
  38  */
  39 #define MASK_ALE                0x08
  40 #define MASK_CLE                0x10
  41
  42 struct davinci_nand_pdata {             /* platform_data */
  43         uint32_t                mask_ale;
  44         uint32_t                mask_cle;
  45
  46         /*
  47          * 0-indexed chip-select number of the asynchronous
  48          * interface to which the NAND device has been connected.
  49          *
  50          * So, if you have NAND connected to CS3 of DA850, you
  51          * will pass '1' here. Since the asynchronous interface
  52          * on DA850 starts from CS2.
  53          */
  54         uint32_t                core_chipsel;
  55
  56         /* for packages using two chipselects */
  57         uint32_t                mask_chipsel;
  58
  59         /* board's default static partition info */
  60         struct mtd_partition    *parts;
  61         unsigned                nr_parts;
  62
  63         /* none  == NAND_ECC_ENGINE_TYPE_NONE (strongly *not* advised!!)
  64          * soft  == NAND_ECC_ENGINE_TYPE_SOFT
  65          * else  == NAND_ECC_ENGINE_TYPE_ON_HOST, according to ecc_bits
  66          *
  67          * All DaVinci-family chips support 1-bit hardware ECC.
  68          * Newer ones also support 4-bit ECC, but are awkward
  69          * using it with large page chips.
  70          */
  71         enum nand_ecc_engine_type engine_type;
  72         enum nand_ecc_placement ecc_placement;
  73         u8                      ecc_bits;
  74
  75         /* e.g. NAND_BUSWIDTH_16 */
  76         unsigned                options;
  77         /* e.g. NAND_BBT_USE_FLASH */
  78         unsigned                bbt_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 */