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/*
* This file is part of the coreboot project.
*
* Copyright 2019 Google Inc.
*
* 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 <console/console.h>
#include <drivers/vpd/vpd.h>
#include <stdint.h>
#include <string.h>
#include <types.h>
#include <vendorcode/google/chromeos/chromeos.h>
#define DSM_BUF_LEN 128
#define DSM_PREFIX "dsm_calib_"
enum cb_err get_dsm_calibration_from_key(const char *key, uint64_t *value)
{
static char buf[DSM_BUF_LEN];
char *ret;
long value_from_vpd;
if (strncmp(key, DSM_PREFIX, strlen(DSM_PREFIX))) {
printk(BIOS_ERR, "got invalid dsm_calib key: %s\n", key);
return CB_ERR;
}
ret = vpd_gets(key, buf, DSM_BUF_LEN, VPD_RO);
if (!ret) {
printk(BIOS_ERR, "failed to find key in VPD: %s\n", key);
return CB_ERR;
}
value_from_vpd = atol(buf);
if (value_from_vpd <= 0) {
printk(BIOS_ERR, "got invalid dsm_calib from VPD: %ld\n", value_from_vpd);
return CB_ERR;
}
*value = value_from_vpd;
return CB_SUCCESS;
}
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