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 #ifdef ELM_BASE
78 void elm_init(void);
79 #else
elm_init(void)80 static inline void elm_init(void)
81 {
82 }
83 #endif
84 #endif /* __ASSEMBLY__ */
85 #endif /* __ASM_ARCH_ELM_H */
86