49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
|
/*
|
||
|
|
* 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 <stdlib.h>
|
||
|
|
#include <console/console.h>
|
||
|
|
#include <soc/rockchip/rk3288/gpio.h>
|
||
|
|
|
||
|
|
#include <boardid.h>
|
||
|
|
|
||
|
|
uint8_t board_id(void)
|
||
|
|
{
|
||
|
|
static int id = -1;
|
||
|
|
static const gpio_t pins[] = {
|
||
|
|
{ .port = 2, .bank = GPIO_A, .idx = 0 },
|
||
|
|
{ .port = 2, .bank = GPIO_A, .idx = 1 },
|
||
|
|
{ .port = 2, .bank = GPIO_A, .idx = 2 },
|
||
|
|
{ .port = 2, .bank = GPIO_A, .idx = 7 },
|
||
|
|
};
|
||
|
|
|
||
|
|
if (id < 0) {
|
||
|
|
int i;
|
||
|
|
|
||
|
|
id = 0;
|
||
|
|
for (i = 0; i < ARRAY_SIZE(pins); i++) {
|
||
|
|
gpio_input(pins[i]);
|
||
|
|
id |= gpio_get_in_value(pins[i]) << i;
|
||
|
|
}
|
||
|
|
printk(BIOS_SPEW, "Board ID: %#x.\n", id);
|
||
|
|
}
|
||
|
|
|
||
|
|
return id;
|
||
|
|
}
|