1 /* 2 * (C) Copyright 2010-2011 Texas Instruments, <www.ti.com> 3 * Mansoor Ahamed <mansoor.ahamed@ti.com> 4 * 5 * Derived from work done by Rohit Choraria <rohitkc@ti.com> for omap3 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 #ifndef __ASM_ARCH_ELM_H 10 #define __ASM_ARCH_ELM_H 11 /* 12 * ELM Module Registers 13 */ 14 15 /* ELM registers bit fields */ 16 #define ELM_SYSCONFIG_SOFTRESET_MASK (0x2) 17 #define ELM_SYSCONFIG_SOFTRESET (0x2) 18 #define ELM_SYSSTATUS_RESETDONE_MASK (0x1) 19 #define ELM_SYSSTATUS_RESETDONE (0x1) 20 #define ELM_LOCATION_CONFIG_ECC_BCH_LEVEL_MASK (0x3) 21 #define ELM_LOCATION_CONFIG_ECC_SIZE_MASK (0x7FF0000) 22 #define ELM_LOCATION_CONFIG_ECC_SIZE_POS (16) 23 #define ELM_SYNDROME_FRAGMENT_6_SYNDROME_VALID (0x00010000) 24 #define ELM_LOCATION_STATUS_ECC_CORRECTABLE_MASK (0x100) 25 #define ELM_LOCATION_STATUS_ECC_NB_ERRORS_MASK (0x1F) 26 27 #define ELM_MAX_CHANNELS 8 28 #define ELM_MAX_ERROR_COUNT 16 29 30 #ifndef __ASSEMBLY__ 31 32 enum bch_level { 33 BCH_4_BIT = 0, 34 BCH_8_BIT, 35 BCH_16_BIT 36 }; 37 38 39 /* BCH syndrome registers */ 40 struct syndrome { 41 u32 syndrome_fragment_x[7]; /* 0x400, 0x404.... 0x418 */ 42 u8 res1[36]; /* 0x41c */ 43 }; 44 45 /* BCH error status & location register */ 46 struct location { 47 u32 location_status; /* 0x800 */ 48 u8 res1[124]; /* 0x804 */ 49 u32 error_location_x[ELM_MAX_ERROR_COUNT]; /* 0x880, 0x980, .. */ 50 u8 res2[64]; /* 0x8c0 */ 51 }; 52 53 /* BCH ELM register map - do not try to allocate memmory for this structure. 54 * We have used plenty of reserved variables to fill the slots in the ELM 55 * register memory map. 56 * Directly initialize the struct pointer to ELM base address. 57 */ 58 struct elm { 59 u32 rev; /* 0x000 */ 60 u8 res1[12]; /* 0x004 */ 61 u32 sysconfig; /* 0x010 */ 62 u32 sysstatus; /* 0x014 */ 63 u32 irqstatus; /* 0x018 */ 64 u32 irqenable; /* 0x01c */ 65 u32 location_config; /* 0x020 */ 66 u8 res2[92]; /* 0x024 */ 67 u32 page_ctrl; /* 0x080 */ 68 u8 res3[892]; /* 0x084 */ 69 struct syndrome syndrome_fragments[ELM_MAX_CHANNELS]; /* 0x400,0x420 */ 70 u8 res4[512]; /* 0x600 */ 71 struct location error_location[ELM_MAX_CHANNELS]; /* 0x800,0x900 ... */ 72 }; 73 74 int elm_check_error(u8 *syndrome, enum bch_level bch_type, u32 *error_count, 75 u32 *error_locations); 76 int elm_config(enum bch_level level); 77 void elm_reset(void); 78 void elm_init(void); 79 #endif /* __ASSEMBLY__ */ 80 #endif /* __ASM_ARCH_ELM_H */ 81