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 #ifndef __ASSEMBLY__ 28 29 enum bch_level { 30 BCH_4_BIT = 0, 31 BCH_8_BIT, 32 BCH_16_BIT 33 }; 34 35 36 /* BCH syndrome registers */ 37 struct syndrome { 38 u32 syndrome_fragment_x[7]; /* 0x400, 0x404.... 0x418 */ 39 u8 res1[36]; /* 0x41c */ 40 }; 41 42 /* BCH error status & location register */ 43 struct location { 44 u32 location_status; /* 0x800 */ 45 u8 res1[124]; /* 0x804 */ 46 u32 error_location_x[16]; /* 0x880.... */ 47 u8 res2[64]; /* 0x8c0 */ 48 }; 49 50 /* BCH ELM register map - do not try to allocate memmory for this structure. 51 * We have used plenty of reserved variables to fill the slots in the ELM 52 * register memory map. 53 * Directly initialize the struct pointer to ELM base address. 54 */ 55 struct elm { 56 u32 rev; /* 0x000 */ 57 u8 res1[12]; /* 0x004 */ 58 u32 sysconfig; /* 0x010 */ 59 u32 sysstatus; /* 0x014 */ 60 u32 irqstatus; /* 0x018 */ 61 u32 irqenable; /* 0x01c */ 62 u32 location_config; /* 0x020 */ 63 u8 res2[92]; /* 0x024 */ 64 u32 page_ctrl; /* 0x080 */ 65 u8 res3[892]; /* 0x084 */ 66 struct syndrome syndrome_fragments[8]; /* 0x400 */ 67 u8 res4[512]; /* 0x600 */ 68 struct location error_location[8]; /* 0x800 */ 69 }; 70 71 int elm_check_error(u8 *syndrome, u32 nibbles, u32 *error_count, 72 u32 *error_locations); 73 int elm_config(enum bch_level level); 74 void elm_reset(void); 75 void elm_init(void); 76 #endif /* __ASSEMBLY__ */ 77 #endif /* __ASM_ARCH_ELM_H */ 78