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/* ----------------------------------------------------------------------- *
*
* Copyright 2006 Erwan Velu - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* -----------------------------------------------------------------------
*/
#include <stdio.h>
#include <string.h>
#include "vpd/vpd.h"
int vpd_checksum(char *buf, int len)
{
uint8_t sum = 0;
int a;
for (a = 0; a < len; a++)
sum += buf[a];
return (sum == 0);
}
int vpd_decode(s_vpd * vpd)
{
uint8_t buf[16];
char *p, *q;
/* Cleaning structures */
memset(&vpd->base_address, 0, sizeof(vpd->base_address));
memset(&vpd->bios_build_id, 0, sizeof(vpd->bios_build_id));
memset(&vpd->box_serial_number, 0, sizeof(vpd->box_serial_number));
memset(&vpd->motherboard_serial_number, 0,
sizeof(vpd->motherboard_serial_number));
memset(&vpd->machine_type_model, 0, sizeof(vpd->machine_type_model));
memset(&vpd->bios_release_date, 0, sizeof(vpd->bios_release_date));
memset(&vpd->default_flash_filename, 0,
sizeof(vpd->default_flash_filename));
memset(&vpd->bios_version, 0, sizeof(vpd->bios_version));
/* Until we found elements in the vpdtable, we consider them as not filled */
vpd->filled = false;
p = (char *)0xF0000; /* The start address to look at the dmi table */
for (q = p; q < p + 0x10000; q += 4) {
memcpy(buf, q, 5);
if (memcmp(buf, "\252\125VPD", 5) == 0) {
snprintf(vpd->base_address, sizeof(vpd->base_address), "%p", q);
if (q[5] < 0x30)
return -ENOVPDTABLE;
vpd->filled = true;
/* XSeries have longer records, exact length seems to vary. */
if (!(q[5] >= 0x45 && vpd_checksum(q, q[5]))
/* Some Netvista seem to work with this. */
&& !(vpd_checksum(q, 0x30))
/* The Thinkpad/Thinkcentre checksum does *not* include the first 13 bytes. */
&& !(vpd_checksum(q + 0x0D, 0x30 - 0x0D))) {
/* A few systems have a bad checksum (xSeries 325, 330, 335
and 345 with early BIOS) but the record is otherwise
valid. */
printf("VPD: Bad checksum!\n");
}
strlcpy(vpd->bios_build_id, q + 0x0D, 9);
strlcpy(vpd->box_serial_number, q + 0x16, 7);
strlcpy(vpd->motherboard_serial_number, q + 0x1D, 11);
strlcpy(vpd->machine_type_model, q + 0x28, 7);
if (q[5] < 0x44)
return VPD_TABLE_PRESENT;
strlcpy(vpd->bios_release_date, q + 0x30, 8);
strlcpy(vpd->default_flash_filename, q + 0x38, 12);
if (q[5] >= 0x46 && q[0x44] != 0x00) {
strlcpy(vpd->bios_version, q + 0x44, 255);
}
return VPD_TABLE_PRESENT;
}
}
return -ENOVPDTABLE;
}
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