| 1 | /* |
| 2 | * Driver O/S-independent utility routines |
| 3 | * |
| 4 | * Copyright 2007, Broadcom Corporation |
| 5 | * All Rights Reserved. |
| 6 | * |
| 7 | * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY |
| 8 | * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM |
| 9 | * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS |
| 10 | * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. |
| 11 | */ |
| 12 | |
| 13 | #include <typedefs.h> |
| 14 | #include <bcmdefs.h> |
| 15 | #include <stdarg.h> |
| 16 | #include <osl.h> |
| 17 | #include <sbutils.h> |
| 18 | #include <bcmendian.h> |
| 19 | #include "utils.h" |
| 20 | |
| 21 | /******************************************************************************* |
| 22 | * crc8 |
| 23 | * |
| 24 | * Computes a crc8 over the input data using the polynomial: |
| 25 | * |
| 26 | * x^8 + x^7 +x^6 + x^4 + x^2 + 1 |
| 27 | * |
| 28 | * The caller provides the initial value (either CRC8_INIT_VALUE |
| 29 | * or the previous returned value) to allow for processing of |
| 30 | * discontiguous blocks of data. When generating the CRC the |
| 31 | * caller is responsible for complementing the final return value |
| 32 | * and inserting it into the byte stream. When checking, a final |
| 33 | * return value of CRC8_GOOD_VALUE indicates a valid CRC. |
| 34 | * |
| 35 | * Reference: Dallas Semiconductor Application Note 27 |
| 36 | * Williams, Ross N., "A Painless Guide to CRC Error Detection Algorithms", |
| 37 | * ver 3, Aug 1993, ross@guest.adelaide.edu.au, Rocksoft Pty Ltd., |
| 38 | * ftp://ftp.rocksoft.com/clients/rocksoft/papers/crc_v3.txt |
| 39 | * |
| 40 | * **************************************************************************** |
| 41 | */ |
| 42 | |
| 43 | static const uint8 crc8_table[256] = { |
| 44 | 0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B, |
| 45 | 0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21, |
| 46 | 0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF, |
| 47 | 0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5, |
| 48 | 0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14, |
| 49 | 0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E, |
| 50 | 0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80, |
| 51 | 0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA, |
| 52 | 0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95, |
| 53 | 0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF, |
| 54 | 0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01, |
| 55 | 0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B, |
| 56 | 0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA, |
| 57 | 0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0, |
| 58 | 0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E, |
| 59 | 0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34, |
| 60 | 0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0, |
| 61 | 0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A, |
| 62 | 0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54, |
| 63 | 0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E, |
| 64 | 0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF, |
| 65 | 0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5, |
| 66 | 0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B, |
| 67 | 0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61, |
| 68 | 0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E, |
| 69 | 0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74, |
| 70 | 0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA, |
| 71 | 0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0, |
| 72 | 0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41, |
| 73 | 0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B, |
| 74 | 0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5, |
| 75 | 0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F |
| 76 | }; |
| 77 | |
| 78 | #define CRC_INNER_LOOP(n, c, x) \ |
| 79 | (c) = ((c) >> 8) ^ crc##n##_table[((c) ^ (x)) & 0xff] |
| 80 | |
| 81 | |
| 82 | uint8 hndcrc8 (uint8 * pdata, /* pointer to array of data to process */ |
| 83 | uint nbytes, /* number of input data bytes to process */ |
| 84 | uint8 crc /* either CRC8_INIT_VALUE or previous return value */ |
| 85 | ) |
| 86 | { |
| 87 | /* hard code the crc loop instead of using CRC_INNER_LOOP macro |
| 88 | * to avoid the undefined and unnecessary (uint8 >> 8) operation. |
| 89 | */ |
| 90 | while (nbytes-- > 0) |
| 91 | crc = crc8_table[(crc ^ *pdata++) & 0xff]; |
| 92 | |
| 93 | return crc; |
| 94 | } |
| 95 | |
| 96 | char * |
| 97 | bcm_ether_ntoa (struct ether_addr *ea, char *buf) |
| 98 | { |
| 99 | snprintf (buf, 18, "%02x:%02x:%02x:%02x:%02x:%02x", |
| 100 | ea->octet[0] & 0xff, ea->octet[1] & 0xff, ea->octet[2] & 0xff, |
| 101 | ea->octet[3] & 0xff, ea->octet[4] & 0xff, ea->octet[5] & 0xff); |
| 102 | return (buf); |
| 103 | } |
| 104 | |
| 105 | |
