1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public
3*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive
4*4882a593Smuzhiyun * for more details.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
7*4882a593Smuzhiyun * Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
8*4882a593Smuzhiyun * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #define pr_fmt(fmt) "bcm63xx_nvram: " fmt
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <linux/bcm963xx_nvram.h>
14*4882a593Smuzhiyun #include <linux/init.h>
15*4882a593Smuzhiyun #include <linux/crc32.h>
16*4882a593Smuzhiyun #include <linux/export.h>
17*4882a593Smuzhiyun #include <linux/kernel.h>
18*4882a593Smuzhiyun #include <linux/if_ether.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include <bcm63xx_nvram.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #define BCM63XX_DEFAULT_PSI_SIZE 64
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun static struct bcm963xx_nvram nvram;
25*4882a593Smuzhiyun static int mac_addr_used;
26*4882a593Smuzhiyun
bcm63xx_nvram_init(void * addr)27*4882a593Smuzhiyun void __init bcm63xx_nvram_init(void *addr)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun u32 crc, expected_crc;
30*4882a593Smuzhiyun u8 hcs_mac_addr[ETH_ALEN] = { 0x00, 0x10, 0x18, 0xff, 0xff, 0xff };
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun /* extract nvram data */
33*4882a593Smuzhiyun memcpy(&nvram, addr, BCM963XX_NVRAM_V5_SIZE);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun /* check checksum before using data */
36*4882a593Smuzhiyun if (bcm963xx_nvram_checksum(&nvram, &expected_crc, &crc))
37*4882a593Smuzhiyun pr_warn("nvram checksum failed, contents may be invalid (expected %08x, got %08x)\n",
38*4882a593Smuzhiyun expected_crc, crc);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun /* Cable modems have a different NVRAM which is embedded in the eCos
41*4882a593Smuzhiyun * firmware and not easily extractible, give at least a MAC address
42*4882a593Smuzhiyun * pool.
43*4882a593Smuzhiyun */
44*4882a593Smuzhiyun if (BCMCPU_IS_3368()) {
45*4882a593Smuzhiyun memcpy(nvram.mac_addr_base, hcs_mac_addr, ETH_ALEN);
46*4882a593Smuzhiyun nvram.mac_addr_count = 2;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
bcm63xx_nvram_get_name(void)50*4882a593Smuzhiyun u8 *bcm63xx_nvram_get_name(void)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun return nvram.name;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun EXPORT_SYMBOL(bcm63xx_nvram_get_name);
55*4882a593Smuzhiyun
bcm63xx_nvram_get_mac_address(u8 * mac)56*4882a593Smuzhiyun int bcm63xx_nvram_get_mac_address(u8 *mac)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun u8 *oui;
59*4882a593Smuzhiyun int count;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun if (mac_addr_used >= nvram.mac_addr_count) {
62*4882a593Smuzhiyun pr_err("not enough mac addresses\n");
63*4882a593Smuzhiyun return -ENODEV;
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun memcpy(mac, nvram.mac_addr_base, ETH_ALEN);
67*4882a593Smuzhiyun oui = mac + ETH_ALEN/2 - 1;
68*4882a593Smuzhiyun count = mac_addr_used;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun while (count--) {
71*4882a593Smuzhiyun u8 *p = mac + ETH_ALEN - 1;
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun do {
74*4882a593Smuzhiyun (*p)++;
75*4882a593Smuzhiyun if (*p != 0)
76*4882a593Smuzhiyun break;
77*4882a593Smuzhiyun p--;
78*4882a593Smuzhiyun } while (p != oui);
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun if (p == oui) {
81*4882a593Smuzhiyun pr_err("unable to fetch mac address\n");
82*4882a593Smuzhiyun return -ENODEV;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun mac_addr_used++;
87*4882a593Smuzhiyun return 0;
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun EXPORT_SYMBOL(bcm63xx_nvram_get_mac_address);
90*4882a593Smuzhiyun
bcm63xx_nvram_get_psi_size(void)91*4882a593Smuzhiyun int bcm63xx_nvram_get_psi_size(void)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun if (nvram.psi_size > 0)
94*4882a593Smuzhiyun return nvram.psi_size;
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun return BCM63XX_DEFAULT_PSI_SIZE;
97*4882a593Smuzhiyun }
98*4882a593Smuzhiyun EXPORT_SYMBOL(bcm63xx_nvram_get_psi_size);
99