projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e7e333cb JG |
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 | ||
| 5a8b0b13 | 13 | #include <linux/bcm963xx_nvram.h> |
| e7e333cb | 14 | #include <linux/init.h> |
| ce8f0d06 | 15 | #include <linux/crc32.h> |
| e7e333cb JG |
16 | #include <linux/export.h> |
| 17 | #include <linux/kernel.h> | |
| 18 | #include <linux/if_ether.h> | |
| 19 | ||
| 20 | #include <bcm63xx_nvram.h> | |
| 21 | ||
| b0a119fd RB |
22 | #define BCM63XX_DEFAULT_PSI_SIZE 64 |
| 23 | ||
| e7e333cb JG |
24 | static struct bcm963xx_nvram nvram; |
| 25 | static int mac_addr_used; | |
| 26 | ||
| 97367519 | 27 | void __init bcm63xx_nvram_init(void *addr) |
| e7e333cb | 28 | { |
| ce8f0d06 | 29 | u32 crc, expected_crc; |
| 0680dc86 | 30 | u8 hcs_mac_addr[ETH_ALEN] = { 0x00, 0x10, 0x18, 0xff, 0xff, 0xff }; |
| e7e333cb JG |
31 | |
| 32 | /* extract nvram data */ | |
| 5a8b0b13 | 33 | memcpy(&nvram, addr, BCM963XX_NVRAM_V5_SIZE); |
| e7e333cb JG |
34 | |
| 35 | /* check checksum before using data */ | |
| 5a8b0b13 | 36 | if (bcm963xx_nvram_checksum(&nvram, &expected_crc, &crc)) |
| 97367519 JG |
37 | pr_warn("nvram checksum failed, contents may be invalid (expected %08x, got %08x)\n", |
| 38 | expected_crc, crc); | |
| 0680dc86 FF |
39 | |
| 40 | /* Cable modems have a different NVRAM which is embedded in the eCos | |
| 41 | * firmware and not easily extractible, give at least a MAC address | |
| 42 | * pool. | |
| 43 | */ | |
| 44 | if (BCMCPU_IS_3368()) { | |
| 45 | memcpy(nvram.mac_addr_base, hcs_mac_addr, ETH_ALEN); | |
| 46 | nvram.mac_addr_count = 2; | |
| 47 | } | |
| e7e333cb JG |
48 | } |
| 49 | ||
| 50 | u8 *bcm63xx_nvram_get_name(void) | |
| 51 | { | |
| 52 | return nvram.name; | |
| 53 | } | |
| 54 | EXPORT_SYMBOL(bcm63xx_nvram_get_name); | |
| 55 | ||
| 56 | int bcm63xx_nvram_get_mac_address(u8 *mac) | |
| 57 | { | |
| 58 | u8 *oui; | |
| 59 | int count; | |
| 60 | ||
| 61 | if (mac_addr_used >= nvram.mac_addr_count) { | |
| 62 | pr_err("not enough mac addresses\n"); | |
| 63 | return -ENODEV; | |
| 64 | } | |
| 65 | ||
| 66 | memcpy(mac, nvram.mac_addr_base, ETH_ALEN); | |
| 67 | oui = mac + ETH_ALEN/2 - 1; | |
| 68 | count = mac_addr_used; | |
| 69 | ||
| 70 | while (count--) { | |
| 71 | u8 *p = mac + ETH_ALEN - 1; | |
| 72 | ||
| 73 | do { | |
| 74 | (*p)++; | |
| 75 | if (*p != 0) | |
| 76 | break; | |
| 77 | p--; | |
| 78 | } while (p != oui); | |
| 79 | ||
| 80 | if (p == oui) { | |
| 81 | pr_err("unable to fetch mac address\n"); | |
| 82 | return -ENODEV; | |
| 83 | } | |
| 84 | } | |
| 85 | ||
| 86 | mac_addr_used++; | |
| 87 | return 0; | |
| 88 | } | |
| 89 | EXPORT_SYMBOL(bcm63xx_nvram_get_mac_address); | |
| b0a119fd RB |
90 | |
| 91 | int bcm63xx_nvram_get_psi_size(void) | |
| 92 | { | |
| 93 | if (nvram.psi_size > 0) | |
| 94 | return nvram.psi_size; | |
| 95 | ||
| 96 | return BCM63XX_DEFAULT_PSI_SIZE; | |
| 97 | } | |
| 98 | EXPORT_SYMBOL(bcm63xx_nvram_get_psi_size); |