diff options
Diffstat (limited to 'contrib/syslinux-4.02/com32/gpllib/vpd/vpd.c')
| -rw-r--r-- | contrib/syslinux-4.02/com32/gpllib/vpd/vpd.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/gpllib/vpd/vpd.c b/contrib/syslinux-4.02/com32/gpllib/vpd/vpd.c new file mode 100644 index 0000000..0e2b148 --- /dev/null +++ b/contrib/syslinux-4.02/com32/gpllib/vpd/vpd.c @@ -0,0 +1,103 @@ +/* ----------------------------------------------------------------------- * + * + * 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; +} |