arch/arm/mach-mt8127/include/mach/bmt.h

   1 #ifndef __BMT_H__
   2 #define __BMT_H__
   3
   4 #include <linux/mtd/mtd.h>
   5 #include <linux/mtd/nand.h>
   6 #include <mach/mtk_nand.h>
   7
   8 #define MAX_BMT_SIZE        (0x200) //0x80
   9 #define BMT_VERSION         (1) // initial version
  10
  11 #define MAIN_SIGNATURE_OFFSET   (0)
  12 #define OOB_SIGNATURE_OFFSET    (1)
  13 #define OOB_INDEX_OFFSET        (29)
  14 #define OOB_INDEX_SIZE          (2)
  15 #define FAKE_INDEX              (0xAAAA)
  16
  17 typedef struct _bmt_entry_
  18 {
  19     u16 bad_index;              // bad block index
  20     u16 mapped_index;           // mapping block index in the replace pool
  21 } bmt_entry;
  22
  23 typedef enum
  24 {
  25     UPDATE_ERASE_FAIL,
  26     UPDATE_WRITE_FAIL,
  27     UPDATE_UNMAPPED_BLOCK,
  28     UPDATE_REASON_COUNT,
  29 } update_reason_t;
  30
  31 typedef struct
  32 {
  33     bmt_entry table[MAX_BMT_SIZE];
  34     u8 version;
  35     u8 mapped_count;            // mapped block count in pool
  36     u8 bad_count;               // bad block count in pool. Not used in V1
  37 } bmt_struct;
  38
  39 /***************************************************************
  40 *                                                              *
  41 * Interface BMT need to use                                    *
  42 *                                                              *
  43 ***************************************************************/
  44 //extern bool mtk_nand_exec_read_page(struct mtd_info *mtd, u32 row, u32 page_size, u8 * dat, u8 * oob);
  45 extern int mtk_nand_exec_read_page(struct mtd_info *mtd, u32 u4RowAddr, u32 u4PageSize, u8 * pPageBuf, u8 * pFDMBuf);
  46 extern int mtk_nand_block_bad_hw(struct mtd_info *mtd, loff_t ofs);
  47 extern int mtk_nand_erase_hw(struct mtd_info *mtd, int page);
  48 extern int mtk_nand_block_markbad_hw(struct mtd_info *mtd, loff_t ofs);
  49 extern int mtk_nand_exec_write_page(struct mtd_info *mtd, u32 row, u32 page_size, u8 * dat, u8 * oob);
  50
  51
  52 /***************************************************************
  53 *                                                              *
  54 * Different function interface for preloader/uboot/kernel      *
  55 *                                                              *
  56 ***************************************************************/
  57 void set_bad_index_to_oob(u8 * oob, u16 index);
  58
  59
  60 bmt_struct *init_bmt(struct nand_chip *nand, int size);
  61 bool update_bmt(u64 offset, update_reason_t reason, u8 * dat, u8 * oob);
  62 unsigned short get_mapping_block_index(int index);
  63
  64 #endif                          // #ifndef __BMT_H__