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 31 enum bch_level { 32 BCH_4_BIT = 0, 33 BCH_8_BIT, 34 BCH_16_BIT 35 }; 36 37 38 /* BCH syndrome registers */ 39 struct syndrome { 40 u32 syndrome_fragment_x[7]; /* 0x400, 0x404.... 0x418 */ 41 u8 res1[36]; /* 0x41c */ 42 }; 43 44 /* BCH error status & location register */ 45 struct 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 */ 57 struct 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 73 int elm_check_error(u8 *syndrome, enum bch_level bch_type, u32 *error_count, 74 u32 *error_locations); 75 int elm_config(enum bch_level level); 76 void elm_reset(void); 77 void elm_init(void); 78 #endif /* __ASSEMBLY__ */ 79 #endif /* __ASM_ARCH_ELM_H */ 80