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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,5,"%X",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");
}
strncpy(vpd->bios_build_id,q+0x0D, 9);
strncpy(vpd->box_serial_number,q+0x16, 7);
strncpy(vpd->motherboard_serial_number,q+0x1D, 11);
strncpy(vpd->machine_type_model,q+0x28, 7);
if (q[5] < 0x44)
return VPD_TABLE_PRESENT;
strncpy(vpd->bios_release_date,q+0x30, 8);
strncpy(vpd->default_flash_filename,q+0x38, 12);
if (q[5] >= 0x46 && q[0x44] != 0x00) {
strncpy(vpd->bios_version,q+0x44, 255);
}
return VPD_TABLE_PRESENT;
}
}
return -ENOVPDTABLE;
}
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