summaryrefslogtreecommitdiff
path: root/board/keymile/common/ivm.c
blob: 918a6ab6398ff23c9fa501cee0f18ea397c96378 (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
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
/*
 * (C) Copyright 2011
 * Holger Brunck, Keymile GmbH Hannover, holger.brunck@keymile.com
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <hush.h>
#include <i2c.h>
#include "common.h"

int ivm_calc_crc(unsigned char *buf, int len)
{
	const unsigned short crc_tab[16] = {
		0x0000, 0xCC01, 0xD801, 0x1400,
		0xF001, 0x3C00, 0x2800, 0xE401,
		0xA001, 0x6C00, 0x7800, 0xB401,
		0x5000, 0x9C01, 0x8801, 0x4400};

	unsigned short crc     = 0;   /* final result */
	unsigned short r1      = 0;   /* temp */
	unsigned char  byte    = 0;   /* input buffer */
	int	i;

	/* calculate CRC from array data */
	for (i = 0; i < len; i++) {
		byte = buf[i];

		/* lower 4 bits */
		r1 = crc_tab[crc & 0xF];
		crc = ((crc) >> 4) & 0x0FFF;
		crc = crc ^ r1 ^ crc_tab[byte & 0xF];

		/* upper 4 bits */
		r1 = crc_tab[crc & 0xF];
		crc = (crc >> 4) & 0x0FFF;
		crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
	}
	return crc;
}

static int ivm_set_value(char *name, char *value)
{
	char tempbuf[256];

	if (value != NULL) {
		sprintf(tempbuf, "%s=%s", name, value);
		return set_local_var(tempbuf, 0);
	} else {
		unset_local_var(name);
	}
	return 0;
}

static int ivm_get_value(unsigned char *buf, int len, char *name, int off,
				int check)
{
	unsigned short	val;
	unsigned char	valbuf[30];

	if ((buf[off + 0] != buf[off + 2]) &&
	    (buf[off + 2] != buf[off + 4])) {
		printf("%s Error corrupted %s\n", __func__, name);
		val = -1;
	} else {
		val = buf[off + 0] + (buf[off + 1] << 8);
		if ((val == 0) && (check == 1))
			val = -1;
	}
	sprintf((char *)valbuf, "%x", val);
	ivm_set_value(name, (char *)valbuf);
	return val;
}

#define INV_BLOCKSIZE		0x100
#define INV_DATAADDRESS		0x21
#define INVENTORYDATASIZE	(INV_BLOCKSIZE - INV_DATAADDRESS - 3)

#define IVM_POS_SHORT_TEXT		0
#define IVM_POS_MANU_ID			1
#define IVM_POS_MANU_SERIAL		2
#define IVM_POS_PART_NUMBER		3
#define IVM_POS_BUILD_STATE		4
#define IVM_POS_SUPPLIER_PART_NUMBER	5
#define IVM_POS_DELIVERY_DATE		6
#define IVM_POS_SUPPLIER_BUILD_STATE	7
#define IVM_POS_CUSTOMER_ID		8
#define IVM_POS_CUSTOMER_PROD_ID	9
#define IVM_POS_HISTORY			10
#define IVM_POS_SYMBOL_ONLY		11

static char convert_char(char c)
{
	return (c < ' ' || c > '~') ? '.' : c;
}

static int ivm_findinventorystring(int type,
					unsigned char *const string,
					unsigned long maxlen,
					unsigned char *buf)
{
	int xcode = 0;
	unsigned long cr = 0;
	unsigned long addr = INV_DATAADDRESS;
	unsigned long size = 0;
	unsigned long nr = type;
	int stop = 0;	/* stop on semicolon */

	memset(string, '\0', maxlen);
	switch (type) {
	case IVM_POS_SYMBOL_ONLY:
		nr = 0;
		stop = 1;
	break;
	default:
		nr = type;
		stop = 0;
	}

	/* Look for the requested number of CR. */
	while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
		if ((buf[addr] == '\r'))
			cr++;
		addr++;
	}

	/*
	 * the expected number of CR was found until the end of the IVM
	 *  content --> fill string
	 */
	if (addr < INVENTORYDATASIZE) {
		/* Copy the IVM string in the corresponding string */
		for (; (buf[addr] != '\r')			&&
			((buf[addr] != ';') ||  (!stop))	&&
			(size < (maxlen - 1)			&&
			(addr < INVENTORYDATASIZE)); addr++) {
			size += sprintf((char *)string + size, "%c",
						convert_char (buf[addr]));
		}

		/*
		 * copy phase is done: check if everything is ok. If not,
		 * the inventory data is most probably corrupted: tell
		 * the world there is a problem!
		 */
		if (addr == INVENTORYDATASIZE) {
			xcode = -1;
			printf("Error end of string not found\n");
		} else if ((size > (maxlen - 1)) &&
			   (buf[addr] != '\r')) {
			xcode = -1;
			printf("string too long till next CR\n");
		}
	} else {
		/*
		 * some CR are missing...
		 * the inventory data is most probably corrupted
		 */
		xcode = -1;
		printf("not enough cr found\n");
	}
	return xcode;
}

#define GET_STRING(name, which, len) \
	if (ivm_findinventorystring(which, valbuf, len, buf) == 0) { \
		ivm_set_value(name, (char *)valbuf); \
	}

static int ivm_check_crc(unsigned char *buf, int block)
{
	unsigned long	crc;
	unsigned long	crceeprom;

	crc = ivm_calc_crc(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
	crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
			buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
	if (crc != crceeprom) {
		if (block == 0)
			printf("Error CRC Block: %d EEprom: calculated: \
			%lx EEprom: %lx\n", block, crc, crceeprom);
		return -1;
	}
	return 0;
}

static int calculate_mac_offset(unsigned char *valbuf, unsigned char *buf,
				int offset)
{
	unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];

	if (offset == 0)
		return 0;

	val += offset;
	buf[4] = (val >> 16) & 0xff;
	buf[5] = (val >> 8) & 0xff;
	buf[6] = val & 0xff;
	sprintf((char *)valbuf, "%pM", buf + 1);
	return 0;
}

static int ivm_analyze_block2(unsigned char *buf, int len)
{
	unsigned char	valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
	unsigned long	count;

	/* IVM_MAC Adress begins at offset 1 */
	sprintf((char *)valbuf, "%pM", buf + 1);
	ivm_set_value("IVM_MacAddress", (char *)valbuf);
	/* if an offset is defined, add it */
	calculate_mac_offset(buf, valbuf, CONFIG_PIGGY_MAC_ADRESS_OFFSET);
#ifdef MACH_TYPE_KM_KIRKWOOD
	setenv((char *)"ethaddr", (char *)valbuf);
#else
	if (getenv("ethaddr") == NULL)
		setenv((char *)"ethaddr", (char *)valbuf);
#endif
#ifdef CONFIG_KMVECT1
/* KMVECT1 has two ethernet interfaces */
	if (getenv("eth1addr") == NULL) {
		calculate_mac_offset(buf, valbuf, 1);
		setenv((char *)"eth1addr", (char *)valbuf);
	}
#endif
	/* IVM_MacCount */
	count = (buf[10] << 24) +
		   (buf[11] << 16) +
		   (buf[12] << 8)  +
		    buf[13];
	if (count == 0xffffffff)
		count = 1;
	sprintf((char *)valbuf, "%lx", count);
	ivm_set_value("IVM_MacCount", (char *)valbuf);
	return 0;
}

int ivm_analyze_eeprom(unsigned char *buf, int len)
{
	unsigned short	val;
	unsigned char	valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
	unsigned char	*tmp;

	if (ivm_check_crc(buf, 0) != 0)
		return -1;

	ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
			"IVM_BoardId", 0, 1);
	val = ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
			"IVM_HWKey", 6, 1);
	if (val != 0xffff) {
		sprintf((char *)valbuf, "%x", ((val / 100) % 10));
		ivm_set_value("IVM_HWVariant", (char *)valbuf);
		sprintf((char *)valbuf, "%x", (val % 100));
		ivm_set_value("IVM_HWVersion", (char *)valbuf);
	}
	ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
		"IVM_Functions", 12, 0);

	GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
	GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
	tmp = (unsigned char *) getenv("IVM_DeviceName");
	if (tmp) {
		int	len = strlen((char *)tmp);
		int	i = 0;

		while (i < len) {
			if (tmp[i] == ';') {
				ivm_set_value("IVM_ShortText",
					(char *)&tmp[i + 1]);
				break;
			}
			i++;
		}
		if (i >= len)
			ivm_set_value("IVM_ShortText", NULL);
	} else {
		ivm_set_value("IVM_ShortText", NULL);
	}
	GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
	GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
	GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
	GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
	GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
	GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
	GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
	GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
	GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)

	if (ivm_check_crc(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
		return 0;
	ivm_analyze_block2(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2],
		CONFIG_SYS_IVM_EEPROM_PAGE_LEN);

	return 0;
}

int ivm_read_eeprom(void)
{
#if defined(CONFIG_I2C_MUX)
	I2C_MUX_DEVICE *dev = NULL;
#endif
	uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
	char	*buf;
	unsigned long dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;
	int ret;

#if defined(CONFIG_SYS_I2C)
	buf = getenv("EEprom_ivm");
	i2c_set_bus_num(buf ? (int)simple_strtol(buf, NULL, 10) : 0);
#else
#if defined(CONFIG_I2C_MUX)
	/* First init the Bus, select the Bus */
	buf = (unsigned char *) getenv("EEprom_ivm");
	if (buf != NULL)
		dev = i2c_mux_ident_muxstring(buf);
	if (dev == NULL) {
		printf("Error couldnt add Bus for IVM\n");
		return -1;
	}
	i2c_set_bus_num(dev->busid);
#endif
	/* add deblocking here */
	i2c_make_abort();

	ret = i2c_read(dev_addr, 0, 1, i2c_buffer,
		CONFIG_SYS_IVM_EEPROM_MAX_LEN);
	if (ret != 0) {
		printf("Error reading EEprom\n");
		return -2;
	}

	return ivm_analyze_eeprom(i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
}