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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Intel Corp.
*
* 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.
*/
#include <console/console.h>
#include <soc/gpio.h>
/*
* Return family number and internal pad number in that community by pad number
* and which community it is in.
*/
uint16_t gpio_family_number(uint8_t community, uint8_t pad)
{
/*
* Refer to BSW BIOS Writers Guide, Table "Family Number".
* BSW has 4 GPIO communities. Each community has up to 7 families and
* each family contains a range of Pad numbers. The number in the array
* is the maximum no. of that range.
* For example: East community, family 0, Pad 0~11.
*/
static const uint8_t community_base[GPIO_COMMUNITY_COUNT]
[GPIO_FAMILIES_MAX_PER_COMM + 1] = {
{0, 8, 16, 24, 32, 40, 48, 56}, /* Southwest */
{0, 9, 22, 34, 46, 59, 59, 59}, /* North */
{0, 12, 24, 24, 24, 24, 24, 24}, /* East */
{0, 8, 20, 26, 34, 44, 55, 55} /* Southeast */
};
const uint8_t *base;
uint8_t i;
/* Validate the pad number */
if (pad > community_base[community][7])
die("Pad number is out of range!");
/* Locate the family number for the pad */
base = &community_base[community][0];
for (i = 0; i < 7; i++) {
if ((pad >= base[0]) && (pad < base[1]))
break;
base++;
}
/* Family number in high byte and inner pad number in lowest byte */
return (i << 8) + pad - *base;
}
/*
* Return pad configuration register offset by pad number and which community
* it is in.
*/
uint32_t *gpio_pad_config_reg(uint8_t community, uint8_t pad)
{
uint16_t fpad;
uint32_t *pad_config_reg;
/* Get the GPIO family number */
fpad = gpio_family_number(community, pad);
/*
* Refer to BSW BIOS Writers Guide, Table "Per Pad Memory Space
* Registers Addresses" for the Pad configuration register calculation.
*/
pad_config_reg = (uint32_t *)(COMMUNITY_BASE(community) + 0x4400 +
(0x400 * (fpad >> 8)) + (8 * (fpad & 0xff)));
return pad_config_reg;
}
int get_gpio(int community_base, int pad0_offset)
{
return (read32((void *)(community_base + pad0_offset))) & PAD_RX_BIT;
}
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