summaryrefslogtreecommitdiff
path: root/board/w7o/vpd.c
blob: fc2cd98321528ab29491525720ad18735cf49b21 (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
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/*
 * (C) Copyright 2001
 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.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
 */

#if defined(VXWORKS)
# include <stdio.h>
# include <string.h>
# define CFG_DEF_EEPROM_ADDR 0xa0
extern char iicReadByte( char, char );
extern ulong_t crc32( unsigned char *, unsigned long );
#else
#include <common.h>
#endif

#include "vpd.h"

/*
 * vpd_reader() - reads VPD data from I2C EEPROMS.
 *                returns pointer to buffer or NULL.
 */
static unsigned char *
vpd_reader(unsigned char *buf, unsigned dev_addr, unsigned off, unsigned count)
{
    unsigned offset = off;			/* Calculated offset */

    /*
     * The main board EEPROM contains
     * SDRAM SPD in the first 128 bytes,
     * so skew the offset.
     */
    if (dev_addr == CFG_DEF_EEPROM_ADDR)
	offset += SDRAM_SPD_DATA_SIZE;

    /* Try to read the I2C EEPROM */
#if defined(VXWORKS)
    {
	int i;
	for( i = 0; i < count; ++i ) {
	    buf[ i ] = iicReadByte( dev_addr, offset+i );
	}
    }
#else
    if (eeprom_read(dev_addr, offset, buf, count)) {
	printf("Failed to read %d bytes from VPD EEPROM 0x%x @ 0x%x\n",
	       count, dev_addr, offset);
	return NULL;
    }
#endif

    return buf;
} /* vpd_reader() */


/*
 * vpd_get_packet() - returns next VPD packet or NULL.
 */
static vpd_packet_t *vpd_get_packet(vpd_packet_t *vpd_packet)
{
    vpd_packet_t *packet = vpd_packet;

    if (packet != NULL) {
	if (packet->identifier == VPD_PID_TERM)
	    return NULL;
	else
	    packet = (vpd_packet_t *)((char *)packet + packet->size + 2);
    }

    return packet;
} /* vpd_get_packet() */


/*
 * vpd_find_packet() - Locates and returns the specified
 *		       VPD packet or NULL on error.
 */
static vpd_packet_t *vpd_find_packet(vpd_t *vpd, unsigned char ident)
{
    vpd_packet_t *packet = (vpd_packet_t *)&vpd->packets;

    /* Guaranteed illegal */
    if (ident == VPD_PID_GI)
	return NULL;

    /* Scan tuples looking for a match */
    while ((packet->identifier != ident) &&
	   (packet->identifier != VPD_PID_TERM))
	packet = vpd_get_packet(packet);

    /* Did we find it? */
    if ((packet->identifier) && (packet->identifier != ident))
	return NULL;
    return packet;
}


/*
 * vpd_is_valid() - Validates contents of VPD data
 *		    in I2C EEPROM.  Returns 1 for
 *		    success or 0 for failure.
 */
static int vpd_is_valid(unsigned dev_addr, unsigned char *buf)
{
    unsigned	    num_bytes;
    vpd_packet_t    *packet;
    vpd_t	    *vpd = (vpd_t *)buf;
    unsigned short  stored_crc16, calc_crc16 = 0xffff;

    /* Check Eyecatcher */
    if (strncmp(vpd->header.eyecatcher, VPD_EYECATCHER, VPD_EYE_SIZE) != 0) {
	unsigned offset = 0;
	if (dev_addr == CFG_DEF_EEPROM_ADDR)
	    offset += SDRAM_SPD_DATA_SIZE;
	printf("Error: VPD EEPROM 0x%x corrupt @ 0x%x\n", dev_addr, offset);

	return 0;
    }

    /* Check Length */
    if (vpd->header.size> VPD_MAX_EEPROM_SIZE) {
	printf("Error: VPD EEPROM 0x%x contains bad size 0x%x\n",
	       dev_addr, vpd->header.size);
	return 0;
    }

    /* Now find the termination packet */
    if ((packet = vpd_find_packet(vpd, VPD_PID_TERM)) == NULL) {
	printf("Error: VPD EEPROM 0x%x missing termination packet\n",
	       dev_addr);
	return 0;
    }

    /* Calculate data size */
    num_bytes = (unsigned long)((unsigned char *)packet -
				(unsigned char *)vpd + sizeof(vpd_packet_t));

    /* Find stored CRC and clear it */
    if ((packet = vpd_find_packet(vpd, VPD_PID_CRC)) == NULL) {
	printf("Error: VPD EEPROM 0x%x missing CRC\n", dev_addr);
	return 0;
    }
    stored_crc16 = *((ushort *)packet->data);
    *(ushort *)packet->data = 0;

    /* OK, lets calculate the CRC and check it */
#if defined(VXWORKS)
    calc_crc16 = (0xffff & crc32(buf, num_bytes));
#else
    calc_crc16 = (0xffff & crc32(0, buf, num_bytes));
#endif
    *(ushort *)packet->data = stored_crc16;     /* Now restore the CRC */
    if (stored_crc16 != calc_crc16) {
	printf("Error: VPD EEPROM 0x%x has bad CRC 0x%x\n",
	       dev_addr, stored_crc16);
	return 0;
    }

    return 1;
} /* vpd_is_valid() */


/*
 * size_ok() - Check to see if packet size matches
 *	       size of data we want. Returns 1 for
 *	       good match or 0 for failure.
 */
static int size_ok(vpd_packet_t *packet, unsigned long size)
{
    if (packet->size != size) {
	printf("VPD Packet 0x%x corrupt.\n", packet->identifier);
	return 0;
    }
    return 1;
} /* size_ok() */


/*
 * strlen_ok() - Check to see if packet size matches
 *		 strlen of the string we want to populate.
 *		 Returns 1 for valid length or 0 for failure.
 */
static int strlen_ok(vpd_packet_t *packet, unsigned long length)
{
    if (packet->size >= length) {
	printf("VPD Packet 0x%x corrupt.\n", packet->identifier);
	return 0;
    }
    return 1;
} /* strlen_ok() */


/*
 * get_vpd_data() - populates the passed VPD structure 'vpdInfo'
 *		    with data obtained from the specified
 *		    I2C EEPROM 'dev_addr'.  Returns 0 for
 *		    success or 1 for failure.
 */
int vpd_get_data(unsigned char dev_addr, VPD *vpdInfo)
{
    unsigned char buf[VPD_EEPROM_SIZE];
    vpd_t *vpd = (vpd_t *)buf;
    vpd_packet_t *packet;

    if (vpdInfo == NULL)
	return 1;

     /*
      * Fill vpdInfo with 0s to blank out
      * unused fields, fill vpdInfo->ethAddrs
      * with all 0xffs so that other's code can
      * determine how many real Ethernet addresses
      * there are.  OUIs starting with 0xff are
      * broadcast addresses, and would never be
      * permantely stored.
      */
    memset((void *)vpdInfo, 0, sizeof(VPD));
    memset((void *)&vpdInfo->ethAddrs, 0xff, sizeof(vpdInfo->ethAddrs));
    vpdInfo->_devAddr = dev_addr;

    /* Read the minimum size first */
    if (vpd_reader(buf, dev_addr, 0, VPD_EEPROM_SIZE) == NULL) {
	return 1;
    }

    /* Check validity of VPD data */
    if (!vpd_is_valid(dev_addr, buf)) {
	printf("VPD Data is INVALID!\n");
	return 1;
    }

    /*
      * Walk all the packets and populate
      * the VPD info structure.
      */
    packet = (vpd_packet_t *)&vpd->packets;
    do {
	switch (packet->identifier) {
	    case VPD_PID_GI:
		printf("Error: Illegal VPD value\n");
		break;
	    case VPD_PID_PID:
		if (strlen_ok(packet, MAX_PROD_ID)) {
		    strncpy(vpdInfo->productId,
			    packet->data, packet->size);
		}
		break;
	    case VPD_PID_REV:
		if (size_ok(packet, sizeof(char)))
		    vpdInfo->revisionId = *packet->data;
		break;
	    case VPD_PID_SN:
		if (size_ok(packet, sizeof(unsigned long))) {
		    vpdInfo->serialNum =
			*(unsigned long *)packet->data;
		}
		break;
	    case VPD_PID_MANID:
		if (size_ok(packet, sizeof(unsigned char)))
		    vpdInfo->manuID = *packet->data;
		break;
	    case VPD_PID_PCO:
		if (size_ok(packet, sizeof(unsigned long))) {
		    vpdInfo->configOpt =
			*(unsigned long *)packet->data;
		}
		break;
	    case VPD_PID_SYSCLK:
		if (size_ok(packet, sizeof(unsigned long)))
		    vpdInfo->sysClk = *(unsigned long *)packet->data;
		break;
	    case VPD_PID_SERCLK:
		if (size_ok(packet, sizeof(unsigned long)))
		    vpdInfo->serClk = *(unsigned long *)packet->data;
		break;
	    case VPD_PID_FLASH:
		if (size_ok(packet, 9)) {	/* XXX - hardcoded,
						   padding in struct */
		    memcpy(&vpdInfo->flashCfg, packet->data, 9);
		}
		break;
	    case VPD_PID_ETHADDR:
		memcpy(vpdInfo->ethAddrs, packet->data, packet->size);
		break;
	    case VPD_PID_POTS:
		if (size_ok(packet, sizeof(char)))
		    vpdInfo->numPOTS = (unsigned)*packet->data;
		break;
	    case VPD_PID_DS1:
		if (size_ok(packet, sizeof(char)))
		    vpdInfo->numDS1 = (unsigned)*packet->data;
	    case VPD_PID_GAL:
	    case VPD_PID_CRC:
	    case VPD_PID_TERM:
		break;
	    default:
		printf("Warning: Found unknown VPD packet ID 0x%x\n",
		       packet->identifier);
		break;
	}
    } while ((packet = vpd_get_packet(packet)));

    return 0;
} /* end get_vpd_data() */


/*
 * vpd_init() - Initialize default VPD environment
 */
int vpd_init(unsigned char dev_addr)
{
    return (0);
} /* vpd_init() */


/*
 * vpd_print() - Pretty print the VPD data.
 */
void vpd_print(VPD *vpdInfo)
{
    const char *const sp    = "";
    const char *const sfmt  = "%4s%-20s: \"%s\"\n";
    const char *const cfmt  = "%4s%-20s: '%c'\n";
    const char *const dfmt  = "%4s%-20s: %ld\n";
    const char *const hfmt  = "%4s%-20s: %08lX\n";
    const char *const dsfmt = "%4s%-20s: %d\n";
    const char *const hsfmt = "%4s%-20s: %04X\n";
    const char *const dhfmt = "%4s%-20s: %ld (%lX)\n";

    printf("VPD read from I2C device: %02X\n", vpdInfo->_devAddr);

    if (vpdInfo->productId[0])
	printf(sfmt, sp, "Product ID", vpdInfo->productId);
    else
	printf(sfmt, sp, "Product ID", "UNKNOWN");

    if (vpdInfo->revisionId)
	printf(cfmt, sp, "Revision ID", vpdInfo->revisionId);

    if (vpdInfo->serialNum)
	printf(dfmt, sp, "Serial Number", vpdInfo->serialNum);

    if (vpdInfo->manuID)
	printf(dfmt, sp, "Manufacture ID", (long)vpdInfo->manuID);

    if (vpdInfo->configOpt)
	printf(hfmt, sp, "Configuration", vpdInfo->configOpt);

    if (vpdInfo->sysClk)
	printf(dhfmt, sp, "System Clock", vpdInfo->sysClk, vpdInfo->sysClk);

    if (vpdInfo->serClk)
	printf(dhfmt, sp, "Serial Clock", vpdInfo->serClk, vpdInfo->serClk);

    if (vpdInfo->numPOTS)
	printf(dfmt, sp, "Number of POTS lines", vpdInfo->numPOTS);

    if (vpdInfo->numDS1)
	printf(dfmt, sp, "Number of DS1s", vpdInfo->numDS1);

    /* Print Ethernet Addresses */
    if (vpdInfo->ethAddrs[0][0] != 0xff) {
	int i, j;
	printf("%4sEtherNet Address(es): ", sp);
	for (i = 0; i < MAX_ETH_ADDRS; i++) {
	    if (vpdInfo->ethAddrs[i][0] != 0xff) {
		for (j = 0; j < 6; j++) {
		    printf("%02X", vpdInfo->ethAddrs[i][j]);
		    if (((j + 1) % 6) != 0)
			printf(":");
		    else
			printf(" ");
		}
		if (((i + 1) % 3) == 0) printf("\n%24s: ", sp);
	    }
	}
	printf("\n");
    }

    if (vpdInfo->flashCfg.mfg && vpdInfo->flashCfg.dev) {
	printf("Main Flash Configuration:\n");
	printf(hsfmt, sp, "Manufacture ID", vpdInfo->flashCfg.mfg);
	printf(hsfmt, sp, "Device ID",      vpdInfo->flashCfg.dev);
	printf(dsfmt, sp, "Device Width",   vpdInfo->flashCfg.devWidth);
	printf(dsfmt, sp, "Num. Devices",   vpdInfo->flashCfg.numDevs);
	printf(dsfmt, sp, "Num. Columns",   vpdInfo->flashCfg.numCols);
	printf(dsfmt, sp, "Column Width",   vpdInfo->flashCfg.colWidth);
	printf(dsfmt, sp, "WE Data Width",  vpdInfo->flashCfg.weDataWidth);
    }
} /* vpd_print() */