2 * Atheros AR71xx minimal nvram support
4 * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/vmalloc.h>
13 #include <linux/errno.h>
14 #include <linux/init.h>
15 #include <linux/string.h>
19 char *ath79_nvram_find_var(const char *name, const char *buf, unsigned buf_len)
21 unsigned len = strlen(name);
24 if (buf_len == 0 || len == 0)
31 return memchr(buf, (int) *name, buf_len);
33 last = (char *) buf + buf_len - len;
34 for (cur = (char *) buf; cur <= last; cur++)
35 if (cur[0] == name[0] && memcmp(cur, name, len) == 0)
41 int ath79_nvram_parse_mac_addr(const char *nvram, unsigned nvram_len,
42 const char *name, char *mac)
49 buf = vmalloc(nvram_len);
53 memcpy(buf, nvram, nvram_len);
54 buf[nvram_len - 1] = '\0';
56 mac_str = ath79_nvram_find_var(name, buf, nvram_len);
62 if (strlen(mac_str) == 19 && mac_str[0] == '"' && mac_str[18] == '"') {
67 t = sscanf(mac_str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
68 &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]);