nvram.h

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/*
 *  Copyright (C) 2005, Broadcom Corporation
 *  Copyright (C) 2006, Felix Fietkau <[email protected]>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#ifndef __NVRAM_H
#define __NVRAM_H

#include <linux/types.h>
#include <linux/kernel.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 */
};

#define NVRAM_HEADER        0x48534C46  /* 'FLSH' */
#define NVRAM_VERSION       1
#define NVRAM_HEADER_SIZE   20
#define NVRAM_SPACE     0x8000

#define FLASH_MIN       0x00020000  /* Minimum flash size */

#define NVRAM_MAX_VALUE_LEN 255
#define NVRAM_MAX_PARAM_LEN 64

#define NVRAM_ERR_INV_PARAM -8
#define NVRAM_ERR_ENVNOTFOUND   -9

extern int nvram_getenv(char *name, char *val, size_t val_len);

static inline void nvram_parse_macaddr(char *buf, u8 macaddr[6])
{
    if (strchr(buf, ':'))
        sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &macaddr[0],
            &macaddr[1], &macaddr[2], &macaddr[3], &macaddr[4],
            &macaddr[5]);
    else if (strchr(buf, '-'))
        sscanf(buf, "%hhx-%hhx-%hhx-%hhx-%hhx-%hhx", &macaddr[0],
            &macaddr[1], &macaddr[2], &macaddr[3], &macaddr[4],
            &macaddr[5]);
    else
        printk(KERN_WARNING "Can not parse mac address: %s\n", buf);
}

#endif