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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <console/console.h>
#include <cpu/cpu.h>
#include <types.h>
#include <string.h>
#include <wrdd.h>
#include <drivers/vpd/vpd.h>
#define CROS_VPD_REGION_NAME "region"
/*
* wrdd_domain_value is ISO 3166-2
* ISO 3166-2 code consists of two parts, separated by a hyphen
* The first part is the ISO 3166-1 alpha-2 code of the country;
* The second part is a string of up to three alphanumeric characters
*/
#define VARIANT_SEPARATOR '.'
struct wrdd_code_value_pair {
const char *code;
u16 value;
};
/* Retrieve the regulatory domain information from VPD and
* return it as an uint16.
* WARNING: if domain information is not found in the VPD,
* this function will fall back to the default value
*/
uint16_t wifi_regulatory_domain(void)
{
static struct wrdd_code_value_pair wrdd_table[] = {
{
/* Indonesia
* Alpha-2 code 'ID'
* Full name 'the Republic of Indonesia'
* Alpha-3 code 'IDN'
* Numeric code '360'
*/
.code = "id",
.value = WRDD_REGULATORY_DOMAIN_INDONESIA
}
};
const char *wrdd_domain_key = CROS_VPD_REGION_NAME;
int i;
struct wrdd_code_value_pair *p;
/* wrdd_domain_value is ISO 3166-2 */
char wrdd_domain_code[7];
char *separator;
/* If not found for any reason fall backto the default value */
if (!vpd_gets(wrdd_domain_key, wrdd_domain_code,
ARRAY_SIZE(wrdd_domain_code), VPD_ANY)) {
printk(BIOS_DEBUG,
"Error: Could not locate '%s' in VPD\n", wrdd_domain_key);
return WRDD_DEFAULT_REGULATORY_DOMAIN;
}
printk(BIOS_DEBUG, "Found '%s'='%s' in VPD\n",
wrdd_domain_key, wrdd_domain_code);
separator = memchr(wrdd_domain_code, VARIANT_SEPARATOR,
ARRAY_SIZE(wrdd_domain_code));
if (separator) {
*separator = '\0';
}
for (i = 0; i < ARRAY_SIZE(wrdd_table); i++) {
p = &wrdd_table[i];
if (strncmp(p->code, wrdd_domain_code,
ARRAY_SIZE(wrdd_domain_code)) == 0)
return p->value;
}
return WRDD_DEFAULT_REGULATORY_DOMAIN;
}
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