diff options
author | Jonas Gorski <jonas.gorski@gmail.com> | 2012-11-07 03:25:28 -0500 |
---|---|---|
committer | John Crispin <blogic@openwrt.org> | 2012-11-09 05:37:18 -0500 |
commit | e7e333cb22e5e34e7a0792f262df52026815662e (patch) | |
tree | cad138b38d58b55f72106a50f0cba7eebb3148ef /arch/mips/bcm63xx/nvram.c | |
parent | ba00e2e5c24f447fb09437a99df697787103f0cd (diff) |
MIPS: BCM63XX: move nvram functions into their own file
Refactor nvram related functions into its own unit for easier expansion
and exposure of the values to other drivers.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/4516
Signed-off-by: John Crispin <blogic@openwrt.org>
Diffstat (limited to 'arch/mips/bcm63xx/nvram.c')
-rw-r--r-- | arch/mips/bcm63xx/nvram.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/arch/mips/bcm63xx/nvram.c b/arch/mips/bcm63xx/nvram.c new file mode 100644 index 000000000000..b57a10db7c98 --- /dev/null +++ b/arch/mips/bcm63xx/nvram.c | |||
@@ -0,0 +1,104 @@ | |||
1 | /* | ||
2 | * This file is subject to the terms and conditions of the GNU General Public | ||
3 | * License. See the file "COPYING" in the main directory of this archive | ||
4 | * for more details. | ||
5 | * | ||
6 | * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> | ||
7 | * Copyright (C) 2008 Florian Fainelli <florian@openwrt.org> | ||
8 | * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com> | ||
9 | */ | ||
10 | |||
11 | #define pr_fmt(fmt) "bcm63xx_nvram: " fmt | ||
12 | |||
13 | #include <linux/init.h> | ||
14 | #include <linux/export.h> | ||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/if_ether.h> | ||
17 | |||
18 | #include <bcm63xx_nvram.h> | ||
19 | |||
20 | /* | ||
21 | * nvram structure | ||
22 | */ | ||
23 | struct bcm963xx_nvram { | ||
24 | u32 version; | ||
25 | u8 reserved1[256]; | ||
26 | u8 name[16]; | ||
27 | u32 main_tp_number; | ||
28 | u32 psi_size; | ||
29 | u32 mac_addr_count; | ||
30 | u8 mac_addr_base[ETH_ALEN]; | ||
31 | u8 reserved2[2]; | ||
32 | u32 checksum_old; | ||
33 | u8 reserved3[720]; | ||
34 | u32 checksum_high; | ||
35 | }; | ||
36 | |||
37 | static struct bcm963xx_nvram nvram; | ||
38 | static int mac_addr_used; | ||
39 | |||
40 | int __init bcm63xx_nvram_init(void *addr) | ||
41 | { | ||
42 | unsigned int check_len; | ||
43 | u8 *p; | ||
44 | u32 val; | ||
45 | |||
46 | /* extract nvram data */ | ||
47 | memcpy(&nvram, addr, sizeof(nvram)); | ||
48 | |||
49 | /* check checksum before using data */ | ||
50 | if (nvram.version <= 4) | ||
51 | check_len = offsetof(struct bcm963xx_nvram, checksum_old); | ||
52 | else | ||
53 | check_len = sizeof(nvram); | ||
54 | val = 0; | ||
55 | p = (u8 *)&nvram; | ||
56 | |||
57 | while (check_len--) | ||
58 | val += *p; | ||
59 | if (val) | ||
60 | return -EINVAL; | ||
61 | |||
62 | return 0; | ||
63 | } | ||
64 | |||
65 | u8 *bcm63xx_nvram_get_name(void) | ||
66 | { | ||
67 | return nvram.name; | ||
68 | } | ||
69 | EXPORT_SYMBOL(bcm63xx_nvram_get_name); | ||
70 | |||
71 | int bcm63xx_nvram_get_mac_address(u8 *mac) | ||
72 | { | ||
73 | u8 *oui; | ||
74 | int count; | ||
75 | |||
76 | if (mac_addr_used >= nvram.mac_addr_count) { | ||
77 | pr_err("not enough mac addresses\n"); | ||
78 | return -ENODEV; | ||
79 | } | ||
80 | |||
81 | memcpy(mac, nvram.mac_addr_base, ETH_ALEN); | ||
82 | oui = mac + ETH_ALEN/2 - 1; | ||
83 | count = mac_addr_used; | ||
84 | |||
85 | while (count--) { | ||
86 | u8 *p = mac + ETH_ALEN - 1; | ||
87 | |||
88 | do { | ||
89 | (*p)++; | ||
90 | if (*p != 0) | ||
91 | break; | ||
92 | p--; | ||
93 | } while (p != oui); | ||
94 | |||
95 | if (p == oui) { | ||
96 | pr_err("unable to fetch mac address\n"); | ||
97 | return -ENODEV; | ||
98 | } | ||
99 | } | ||
100 | |||
101 | mac_addr_used++; | ||
102 | return 0; | ||
103 | } | ||
104 | EXPORT_SYMBOL(bcm63xx_nvram_get_mac_address); | ||