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/*
* This file is part of the coreboot project.
*
* Copyright 2014 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <boardid.h>
#include <console/console.h>
#include <soc/gpio.h>
#include <stdlib.h>
#include "gpio.h"
/*
* +------------------+---------+
* | BD_ID_STRAP[1:0] | PHASE |
* +------------------+---------+
* | 00 | PROTO0 |
* +------------------+---------+
* | 01 | PROTO1 |
* +------------------+---------+
* | 0Z | EVT |
* +------------------+---------+
* | 10 | DVT |
* +------------------+---------+
* | 11 | PVT |
* +------------------+---------+
* | 1Z | MP |
* +------------------+---------+
* | Z0 | |
* +------------------+---------+
* | Z1 | |
* +------------------+---------+
* | ZZ | |
* +------------------+---------+
*/
struct id_to_str {
const char *str;
int tri_state_value;
int normalized_id;
};
static const struct id_to_str bdid_map[] = {
{ "PROTO 0", 0x00, BOARD_ID_PROTO_0 },
{ "PROTO 1", 0x01, BOARD_ID_PROTO_1 },
{ "EVT", 0x02, BOARD_ID_EVT },
{ "DVT", 0x04, BOARD_ID_DVT },
{ "PVT", 0x05, BOARD_ID_PVT },
{ "MP", 0x06, BOARD_ID_MP },
{ "Z0", 0x08, -1 },
{ "Z1", 0x09, -1 },
{ "ZZ", 0x0a, -1 },
};
uint8_t board_id(void)
{
static int id = -1;
if (id < 0) {
const char *idstr = "Unknown";
int i;
int tristate_id;
gpio_t gpio[] = { BD_ID0, BD_ID1 };
tristate_id = gpio_get_in_tristate_values(gpio,
ARRAY_SIZE(gpio), 0);
for (i = 0; i < ARRAY_SIZE(bdid_map); i++) {
if (tristate_id != bdid_map[i].tri_state_value)
continue;
idstr = bdid_map[i].str;
id = bdid_map[i].normalized_id;
break;
}
printk(BIOS_SPEW, "Board ID: '%s' %d (%#x)\n", idstr, id,
tristate_id);
}
return id;
}
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