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purism/librem13v2: Add reading of serial number from CBFS 

Check CBFS for 'serial_number' field, and use value if exists;
otherwise use value set at compile time.

Change-Id: I4b50f6310ca32b9dd372db075a5b5729e3b06619
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Signed-off-by: Youness Alaoui <youness.alaoui@puri.sm>
Reviewed-on: https://review.coreboot.org/22040
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Youness Alaoui 2017-06-12 13:05:36 -04:00 committed by Martin Roth
parent f68e3bab9f
commit c0a32cad28
1 changed files with 49 additions and 0 deletions
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49
src/mainboard/purism/librem13v2/mainboard.c Normal file
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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Purism SPC
*
* 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; version 2 of the License.
*
* 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.
*/
#include <smbios.h>
#include <string.h>
#include <cbfs.h>
#define MAX_SERIAL_LENGTH 0x100
const char *smbios_mainboard_serial_number(void)
{
static char serial_number[MAX_SERIAL_LENGTH + 1] = {0};
struct cbfsf file;
if (serial_number[0] != 0)
return serial_number;
if (cbfs_boot_locate(&file, "serial_number", NULL) == 0) {
struct region_device cbfs_region;
size_t serial_len;
cbfs_file_data(&cbfs_region, &file);
serial_len = region_device_sz(&cbfs_region);
if (serial_len <= MAX_SERIAL_LENGTH) {
if (rdev_readat(&cbfs_region, serial_number, 0,
serial_len) == serial_len) {
serial_number[serial_len] = 0;
return serial_number;
}
}
}
strncpy(serial_number, CONFIG_MAINBOARD_SERIAL_NUMBER, MAX_SERIAL_LENGTH);
return serial_number;
}