LXR uboot/include/linux/mtd/omap

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * (C) Copyright 2010-2011 Texas Instruments, <www.ti.com>
   4 * Mansoor Ahamed <mansoor.ahamed@ti.com>
   5 *
   6 * Derived from work done by Rohit Choraria <rohitkc@ti.com> for omap3
   7 */
   8#ifndef __ASM_ARCH_ELM_H
   9#define __ASM_ARCH_ELM_H
  10/*
  11 * ELM Module Registers
  12 */
  13
  14/* ELM registers bit fields */
  15#define ELM_SYSCONFIG_SOFTRESET_MASK                    (0x2)
  16#define ELM_SYSCONFIG_SOFTRESET                 (0x2)
  17#define ELM_SYSSTATUS_RESETDONE_MASK                    (0x1)
  18#define ELM_SYSSTATUS_RESETDONE                 (0x1)
  19#define ELM_LOCATION_CONFIG_ECC_BCH_LEVEL_MASK          (0x3)
  20#define ELM_LOCATION_CONFIG_ECC_SIZE_MASK               (0x7FF0000)
  21#define ELM_LOCATION_CONFIG_ECC_SIZE_POS                (16)
  22#define ELM_SYNDROME_FRAGMENT_6_SYNDROME_VALID          (0x00010000)
  23#define ELM_LOCATION_STATUS_ECC_CORRECTABLE_MASK        (0x100)
  24#define ELM_LOCATION_STATUS_ECC_NB_ERRORS_MASK          (0x1F)
  25
  26#define ELM_MAX_CHANNELS                                8
  27#define ELM_MAX_ERROR_COUNT                             16
  28
  29#ifndef __ASSEMBLY__
  30
  31enum bch_level {
  32        BCH_4_BIT = 0,
  33        BCH_8_BIT,
  34        BCH_16_BIT
  35};
  36
  37
  38/* BCH syndrome registers */
  39struct syndrome {
  40        u32 syndrome_fragment_x[7];     /* 0x400, 0x404.... 0x418 */
  41        u8 res1[36];                    /* 0x41c */
  42};
  43
  44/* BCH error status & location register */
  45struct location {
  46        u32 location_status;            /* 0x800 */
  47        u8 res1[124];                   /* 0x804 */
  48        u32 error_location_x[ELM_MAX_ERROR_COUNT]; /* 0x880, 0x980, .. */
  49        u8 res2[64];                    /* 0x8c0 */
  50};
  51
  52/* BCH ELM register map - do not try to allocate memmory for this structure.
  53 * We have used plenty of reserved variables to fill the slots in the ELM
  54 * register memory map.
  55 * Directly initialize the struct pointer to ELM base address.
  56 */
  57struct elm {
  58        u32 rev;                                /* 0x000 */
  59        u8 res1[12];                            /* 0x004 */
  60        u32 sysconfig;                          /* 0x010 */
  61        u32 sysstatus;                          /* 0x014 */
  62        u32 irqstatus;                          /* 0x018 */
  63        u32 irqenable;                          /* 0x01c */
  64        u32 location_config;                    /* 0x020 */
  65        u8 res2[92];                            /* 0x024 */
  66        u32 page_ctrl;                          /* 0x080 */
  67        u8 res3[892];                           /* 0x084 */
  68        struct  syndrome syndrome_fragments[ELM_MAX_CHANNELS]; /* 0x400,0x420 */
  69        u8 res4[512];                           /* 0x600 */
  70        struct location  error_location[ELM_MAX_CHANNELS]; /* 0x800,0x900 ... */
  71};
  72
  73int elm_check_error(u8 *syndrome, enum bch_level bch_type, u32 *error_count,
  74                u32 *error_locations);
  75int elm_config(enum bch_level level);
  76void elm_reset(void);
  77void elm_init(void);
  78#endif /* __ASSEMBLY__ */
  79#endif /* __ASM_ARCH_ELM_H */
  80