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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2010-2011 Texas Instruments, <www.ti.com>
* Mansoor Ahamed <mansoor.ahamed@ti.com>
*
* Derived from work done by Rohit Choraria <rohitkc@ti.com> for omap3
*/
#ifndef __ASM_ARCH_ELM_H
#define __ASM_ARCH_ELM_H
/*
* ELM Module Registers
*/
/* ELM registers bit fields */
#define ELM_SYSCONFIG_SOFTRESET_MASK (0x2)
#define ELM_SYSCONFIG_SOFTRESET (0x2)
#define ELM_SYSSTATUS_RESETDONE_MASK (0x1)
#define ELM_SYSSTATUS_RESETDONE (0x1)
#define ELM_LOCATION_CONFIG_ECC_BCH_LEVEL_MASK (0x3)
#define ELM_LOCATION_CONFIG_ECC_SIZE_MASK (0x7FF0000)
#define ELM_LOCATION_CONFIG_ECC_SIZE_POS (16)
#define ELM_SYNDROME_FRAGMENT_6_SYNDROME_VALID (0x00010000)
#define ELM_LOCATION_STATUS_ECC_CORRECTABLE_MASK (0x100)
#define ELM_LOCATION_STATUS_ECC_NB_ERRORS_MASK (0x1F)
#define ELM_MAX_CHANNELS 8
#define ELM_MAX_ERROR_COUNT 16
#ifndef __ASSEMBLY__
enum bch_level {
BCH_4_BIT = 0,
BCH_8_BIT,
BCH_16_BIT
};
/* BCH syndrome registers */
struct syndrome {
u32 syndrome_fragment_x[7]; /* 0x400, 0x404.... 0x418 */
u8 res1[36]; /* 0x41c */
};
/* BCH error status & location register */
struct location {
u32 location_status; /* 0x800 */
u8 res1[124]; /* 0x804 */
u32 error_location_x[ELM_MAX_ERROR_COUNT]; /* 0x880, 0x980, .. */
u8 res2[64]; /* 0x8c0 */
};
/* BCH ELM register map - do not try to allocate memmory for this structure.
* We have used plenty of reserved variables to fill the slots in the ELM
* register memory map.
* Directly initialize the struct pointer to ELM base address.
*/
struct elm {
u32 rev; /* 0x000 */
u8 res1[12]; /* 0x004 */
u32 sysconfig; /* 0x010 */
u32 sysstatus; /* 0x014 */
u32 irqstatus; /* 0x018 */
u32 irqenable; /* 0x01c */
u32 location_config; /* 0x020 */
u8 res2[92]; /* 0x024 */
u32 page_ctrl; /* 0x080 */
u8 res3[892]; /* 0x084 */
struct syndrome syndrome_fragments[ELM_MAX_CHANNELS]; /* 0x400,0x420 */
u8 res4[512]; /* 0x600 */
struct location error_location[ELM_MAX_CHANNELS]; /* 0x800,0x900 ... */
};
int elm_check_error(u8 *syndrome, enum bch_level bch_type, u32 *error_count,
u32 *error_locations);
int elm_config(enum bch_level level);
void elm_reset(void);
void elm_init(void);
#endif /* __ASSEMBLY__ */
#endif /* __ASM_ARCH_ELM_H */
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