| /* |
| * Copyright (c) 2010 Broadcom Corporation |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #ifndef _bcmnvram_h_ |
| #define _bcmnvram_h_ |
| |
| #ifndef _LANGUAGE_ASSEMBLY |
| |
| #include <typedefs.h> |
| #include <bcmdefs.h> |
| |
| struct nvram_header { |
| u32 magic; |
| u32 len; |
| u32 crc_ver_init; /* 0:7 crc, 8:15 ver, 16:31 sdram_init */ |
| u32 config_refresh; /* 0:15 sdram_config, 16:31 sdram_refresh */ |
| u32 config_ncdl; /* ncdl values for memc */ |
| }; |
| |
| struct nvram_tuple { |
| char *name; |
| char *value; |
| struct nvram_tuple *next; |
| }; |
| |
| /* |
| * Get default value for an NVRAM variable |
| */ |
| extern char *nvram_default_get(const char *name); |
| |
| /* |
| * Initialize NVRAM access. May be unnecessary or undefined on certain |
| * platforms. |
| */ |
| extern int nvram_init(void *sih); |
| |
| /* |
| * Append a chunk of nvram variables to the global list |
| */ |
| extern int nvram_append(void *si, char *vars, uint varsz); |
| |
| /* |
| * Check for reset button press for restoring factory defaults. |
| */ |
| extern int nvram_reset(void *sih); |
| |
| /* |
| * Disable NVRAM access. May be unnecessary or undefined on certain |
| * platforms. |
| */ |
| extern void nvram_exit(void *sih); |
| |
| /* |
| * Get the value of an NVRAM variable. The pointer returned may be |
| * invalid after a set. |
| * @param name name of variable to get |
| * @return value of variable or NULL if undefined |
| */ |
| extern char *nvram_get(const char *name); |
| |
| /* |
| * Read the reset GPIO value from the nvram and set the GPIO |
| * as input |
| */ |
| extern int nvram_resetgpio_init(void *sih); |
| |
| /* |
| * Get the value of an NVRAM variable. |
| * @param name name of variable to get |
| * @return value of variable or NUL if undefined |
| */ |
| #define nvram_safe_get(name) (nvram_get(name) ? : "") |
| |
| /* |
| * Match an NVRAM variable. |
| * @param name name of variable to match |
| * @param match value to compare against value of variable |
| * @return true if variable is defined and its value is string equal |
| * to match or false otherwise |
| */ |
| static inline int nvram_match(char *name, char *match) |
| { |
| const char *value = nvram_get(name); |
| return value && !strcmp(value, match); |
| } |
| |
| /* |
| * Inversely match an NVRAM variable. |
| * @param name name of variable to match |
| * @param match value to compare against value of variable |
| * @return true if variable is defined and its value is not string |
| * equal to invmatch or false otherwise |
| */ |
| static inline int nvram_invmatch(char *name, char *invmatch) |
| { |
| const char *value = nvram_get(name); |
| return value && strcmp(value, invmatch); |
| } |
| |
| /* |
| * Set the value of an NVRAM variable. The name and value strings are |
| * copied into private storage. Pointers to previously set values |
| * may become invalid. The new value may be immediately |
| * retrieved but will not be permanently stored until a commit. |
| * @param name name of variable to set |
| * @param value value of variable |
| * @return 0 on success and errno on failure |
| */ |
| extern int nvram_set(const char *name, const char *value); |
| |
| /* |
| * Unset an NVRAM variable. Pointers to previously set values |
| * remain valid until a set. |
| * @param name name of variable to unset |
| * @return 0 on success and errno on failure |
| * NOTE: use nvram_commit to commit this change to flash. |
| */ |
| extern int nvram_unset(const char *name); |
| |
| /* |
| * Commit NVRAM variables to permanent storage. All pointers to values |
| * may be invalid after a commit. |
| * NVRAM values are undefined after a commit. |
| * @return 0 on success and errno on failure |
| */ |
| extern int nvram_commit(void); |
| |
| /* |
| * Get all NVRAM variables (format name=value\0 ... \0\0). |
| * @param buf buffer to store variables |
| * @param count size of buffer in bytes |
| * @return 0 on success and errno on failure |
| */ |
| extern int nvram_getall(char *nvram_buf, int count); |
| |
| /* |
| * returns the crc value of the nvram |
| * @param nvh nvram header pointer |
| */ |
| u8 nvram_calc_crc(struct nvram_header *nvh); |
| |
| #endif /* _LANGUAGE_ASSEMBLY */ |
| |
| /* The NVRAM version number stored as an NVRAM variable */ |
| #define NVRAM_SOFTWARE_VERSION "1" |
| |
| #define NVRAM_MAGIC 0x48534C46 /* 'FLSH' */ |
| #define NVRAM_CLEAR_MAGIC 0x0 |
| #define NVRAM_INVALID_MAGIC 0xFFFFFFFF |
| #define NVRAM_VERSION 1 |
| #define NVRAM_HEADER_SIZE 20 |
| #define NVRAM_SPACE 0x8000 |
| |
| #define NVRAM_MAX_VALUE_LEN 255 |
| #define NVRAM_MAX_PARAM_LEN 64 |
| |
| #define NVRAM_CRC_START_POSITION 9 /* magic, len, crc8 to be skipped */ |
| #define NVRAM_CRC_VER_MASK 0xffffff00 /* for crc_ver_init */ |
| |
| #endif /* _bcmnvram_h_ */ |