include/linux/platform_data/mtd-nand-omap2.h

   1 /*
   2  * arch/arm/plat-omap/include/mach/nand.h
   3  *
   4  * Copyright (C) 2006 Micron Technology Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef _MTD_NAND_OMAP2_H
  12 #define _MTD_NAND_OMAP2_H
  13
  14 #include <linux/mtd/partitions.h>
  15
  16 #define GPMC_BCH_NUM_REMAINDER  8
  17
  18 enum nand_io {
  19         NAND_OMAP_PREFETCH_POLLED = 0,  /* prefetch polled mode, default */
  20         NAND_OMAP_POLLED,               /* polled mode, without prefetch */
  21         NAND_OMAP_PREFETCH_DMA,         /* prefetch enabled sDMA mode */
  22         NAND_OMAP_PREFETCH_IRQ          /* prefetch enabled irq mode */
  23 };
  24
  25 enum omap_ecc {
  26                 /* 1-bit ecc: stored at end of spare area */
  27         OMAP_ECC_HAMMING_CODE_DEFAULT = 0, /* Default, s/w method */
  28         OMAP_ECC_HAMMING_CODE_HW, /* gpmc to detect the error */
  29                 /* 1-bit ecc: stored at beginning of spare area as romcode */
  30         OMAP_ECC_HAMMING_CODE_HW_ROMCODE, /* gpmc method & romcode layout */
  31         OMAP_ECC_BCH4_CODE_HW, /* 4-bit BCH ecc code */
  32         OMAP_ECC_BCH8_CODE_HW, /* 8-bit BCH ecc code */
  33 };
  34
  35 struct gpmc_nand_regs {
  36         void __iomem    *gpmc_status;
  37         void __iomem    *gpmc_nand_command;
  38         void __iomem    *gpmc_nand_address;
  39         void __iomem    *gpmc_nand_data;
  40         void __iomem    *gpmc_prefetch_config1;
  41         void __iomem    *gpmc_prefetch_config2;
  42         void __iomem    *gpmc_prefetch_control;
  43         void __iomem    *gpmc_prefetch_status;
  44         void __iomem    *gpmc_ecc_config;
  45         void __iomem    *gpmc_ecc_control;
  46         void __iomem    *gpmc_ecc_size_config;
  47         void __iomem    *gpmc_ecc1_result;
  48         void __iomem    *gpmc_bch_result0[GPMC_BCH_NUM_REMAINDER];
  49         void __iomem    *gpmc_bch_result1[GPMC_BCH_NUM_REMAINDER];
  50         void __iomem    *gpmc_bch_result2[GPMC_BCH_NUM_REMAINDER];
  51         void __iomem    *gpmc_bch_result3[GPMC_BCH_NUM_REMAINDER];
  52 };
  53
  54 struct omap_nand_platform_data {
  55         int                     cs;
  56         struct mtd_partition    *parts;
  57         int                     nr_parts;
  58         bool                    dev_ready;
  59         enum nand_io            xfer_type;
  60         int                     devsize;
  61         enum omap_ecc           ecc_opt;
  62         struct gpmc_nand_regs   reg;
  63
  64         /* for passing the partitions */
  65         struct device_node      *of_node;
  66 };
  67 #endif