summaryrefslogtreecommitdiffstats
path: root/target/linux/brcm-2.4/files/arch/mips/bcm947xx/bcmutils.c
blob: c7b0b3d3c81409c98d65b4b94a55b261122b43d8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
/*
 * Misc useful OS-independent routines.
 *
 * Copyright 2006, Broadcom Corporation
 * All Rights Reserved.
 * 
 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 * $Id: bcmutils.c,v 1.1.1.12 2006/02/27 03:43:16 honor Exp $
 */

#include <typedefs.h>
#include <bcmdefs.h>
#include <stdarg.h>
#include <bcmutils.h>
#include <osl.h>
#include <sbutils.h>
#include <bcmnvram.h>
#include <bcmendian.h>
#include <bcmdevs.h>

unsigned char bcm_ctype[] = {
	_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,			/* 0-7 */
	_BCM_C, _BCM_C|_BCM_S, _BCM_C|_BCM_S, _BCM_C|_BCM_S, _BCM_C|_BCM_S, _BCM_C|_BCM_S, _BCM_C,
	_BCM_C,	/* 8-15 */
	_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,			/* 16-23 */
	_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,_BCM_C,			/* 24-31 */
	_BCM_S|_BCM_SP,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,		/* 32-39 */
	_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,			/* 40-47 */
	_BCM_D,_BCM_D,_BCM_D,_BCM_D,_BCM_D,_BCM_D,_BCM_D,_BCM_D,			/* 48-55 */
	_BCM_D,_BCM_D,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,			/* 56-63 */
	_BCM_P, _BCM_U|_BCM_X, _BCM_U|_BCM_X, _BCM_U|_BCM_X, _BCM_U|_BCM_X, _BCM_U|_BCM_X,
	_BCM_U|_BCM_X, _BCM_U, /* 64-71 */
	_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,			/* 72-79 */
	_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,_BCM_U,			/* 80-87 */
	_BCM_U,_BCM_U,_BCM_U,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_P,			/* 88-95 */
	_BCM_P, _BCM_L|_BCM_X, _BCM_L|_BCM_X, _BCM_L|_BCM_X, _BCM_L|_BCM_X, _BCM_L|_BCM_X,
	_BCM_L|_BCM_X, _BCM_L, /* 96-103 */
	_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L, /* 104-111 */
	_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L,_BCM_L, /* 112-119 */
	_BCM_L,_BCM_L,_BCM_L,_BCM_P,_BCM_P,_BCM_P,_BCM_P,_BCM_C, /* 120-127 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,		/* 128-143 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,		/* 144-159 */
	_BCM_S|_BCM_SP, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P,
	_BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P,	/* 160-175 */
	_BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P,
	_BCM_P, _BCM_P, _BCM_P, _BCM_P, _BCM_P,	/* 176-191 */
	_BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U,
	_BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U,	/* 192-207 */
	_BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_P, _BCM_U, _BCM_U, _BCM_U,
	_BCM_U, _BCM_U, _BCM_U, _BCM_U, _BCM_L,	/* 208-223 */
	_BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L,
	_BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L,	/* 224-239 */
	_BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_P, _BCM_L, _BCM_L, _BCM_L,
	_BCM_L, _BCM_L, _BCM_L, _BCM_L, _BCM_L /* 240-255 */
};


ulong
bcm_strtoul(char *cp, char **endp, uint base)
{
	ulong result, value;
	bool minus;

	minus = FALSE;

	while (bcm_isspace(*cp))
		cp++;

	if (cp[0] == '+')
		cp++;
	else if (cp[0] == '-') {
		minus = TRUE;
		cp++;
	}

	if (base == 0) {
		if (cp[0] == '0') {
			if ((cp[1] == 'x') || (cp[1] == 'X')) {
				base = 16;
				cp = &cp[2];
			} else {
				base = 8;
				cp = &cp[1];
			}
		} else
			base = 10;
	} else if (base == 16 && (cp[0] == '0') && ((cp[1] == 'x') || (cp[1] == 'X'))) {
		cp = &cp[2];
	}

	result = 0;

	while (bcm_isxdigit(*cp) &&
	       (value = bcm_isdigit(*cp) ? *cp-'0' : bcm_toupper(*cp)-'A'+10) < base) {
		result = result*base + value;
		cp++;
	}

	if (minus)
		result = (ulong)(result * -1);

	if (endp)
		*endp = (char *)cp;

	return (result);
}

uchar
bcm_toupper(uchar c)
{
	if (bcm_islower(c))
		c -= 'a'-'A';
	return (c);
}

char*
bcm_ether_ntoa(struct ether_addr *ea, char *buf)
{
	sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
		ea->octet[0]&0xff, ea->octet[1]&0xff, ea->octet[2]&0xff,
		ea->octet[3]&0xff, ea->octet[4]&0xff, ea->octet[5]&0xff);
	return (buf);
}


/*
 * Search the name=value vars for a specific one and return its value.
 * Returns NULL if not found.
 */
char*
getvar(char *vars, char *name)
{
	char *s;
	int len;

	len = strlen(name);

	/* first look in vars[] */
	for (s = vars; s && *s;) {
		/* CSTYLED */
		if ((memcmp(s, name, len) == 0) && (s[len] == '='))
			return (&s[len+1]);

		while (*s++)
			;
	}

	/* then query nvram */
	return (nvram_get(name));
}

/*
 * Search the vars for a specific one and return its value as
 * an integer. Returns 0 if not found.
 */
int
getintvar(char *vars, char *name)
{
	char *val;

	if ((val = getvar(vars, name)) == NULL)
		return (0);

	return (bcm_strtoul(val, NULL, 0));
}


/*******************************************************************************
 * crc8
 *
 * Computes a crc8 over the input data using the polynomial:
 *
 *       x^8 + x^7 +x^6 + x^4 + x^2 + 1
 *
 * The caller provides the initial value (either CRC8_INIT_VALUE
 * or the previous returned value) to allow for processing of
 * discontiguous blocks of data.  When generating the CRC the
 * caller is responsible for complementing the final return value
 * and inserting it into the byte stream.  When checking, a final
 * return value of CRC8_GOOD_VALUE indicates a valid CRC.
 *
 * Reference: Dallas Semiconductor Application Note 27
 *   Williams, Ross N., "A Painless Guide to CRC Error Detection Algorithms",
 *     ver 3, Aug 1993, ross@guest.adelaide.edu.au, Rocksoft Pty Ltd.,
 *     ftp://ftp.rocksoft.com/clients/rocksoft/papers/crc_v3.txt
 *
 * ****************************************************************************
 */

static uint8 crc8_table[256] = {
    0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
    0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
    0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
    0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
    0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
    0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
    0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
    0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
    0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
    0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
    0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
    0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
    0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
    0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
    0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
    0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
    0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
    0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
    0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
    0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
    0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
    0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
    0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
    0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
    0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
    0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
    0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
    0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
    0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
    0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
    0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
    0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F
};

#define CRC_INNER_LOOP(n, c, x) \
	(c) = ((c) >> 8) ^ crc##n##_table[((c) ^ (x)) & 0xff]

uint8
hndcrc8(
	uint8 *pdata,	/* pointer to array of data to process */
	uint  nbytes,	/* number of input data bytes to process */
	uint8 crc	/* either CRC8_INIT_VALUE or previous return value */
)
{
	/* hard code the crc loop instead of using CRC_INNER_LOOP macro
	 * to avoid the undefined and unnecessary (uint8 >> 8) operation.
	 */
	while (nbytes-- > 0)
		crc = crc8_table[(crc ^ *pdata++) & 0xff];

	return crc;
}