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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Intel Corp.
* (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*/
#ifndef _SOC_APOLLOLAKE_GPIO_H_
#define _SOC_APOLLOLAKE_GPIO_H_
#include <types.h>
#include <soc/gpio_defs.h>
typedef uint32_t gpio_t;
#define PAD_FUNC(value) PAD_CFG0_MODE_##value
#define PAD_RESET(value) PAD_CFG0_RESET_##value
#define PAD_PULL(value) PAD_CFG1_PULL_##value
#define PAD_IRQ_CFG(route, trig, inv) \
(PAD_CFG0_ROUTE_##route | \
PAD_CFG0_TRIG_##trig | \
(PAD_CFG0_RX_POL_##inv))
#define _PAD_CFG_STRUCT(__pad, __config0, __config1) \
{ \
.pad = __pad, \
.config0 = __config0, \
.config1 = __config1, \
}
/* Native function configuration */
#define PAD_CFG_NF(pad, pull, rst, func) \
_PAD_CFG_STRUCT(pad, PAD_RESET(rst) | PAD_FUNC(func), PAD_PULL(pull))
/* General purpose output, no pullup/down. */
#define PAD_CFG_GPO(pad, val, rst) \
_PAD_CFG_STRUCT(pad, \
PAD_FUNC(GPIO) | PAD_RESET(rst) | PAD_CFG0_RX_DISABLE | !!val, \
PAD_PULL(NONE))
/* General purpose input */
#define PAD_CFG_GPI(pad, pull, rst) \
_PAD_CFG_STRUCT(pad, \
PAD_FUNC(GPIO) | PAD_RESET(rst) | PAD_CFG0_TX_DISABLE, \
PAD_PULL(pull))
/* No Connect configuration for unused pad.
* NC should be GPI with Term as PU20K, PD20K, NONE depending upon default Term
*/
#define PAD_NC(pad, pull) PAD_CFG_GPI(pad, pull, DEEP)
/* General purpose input, routed to APIC */
#define PAD_CFG_GPI_APIC(pad, pull, rst, trig, inv) \
_PAD_CFG_STRUCT(pad, \
PAD_FUNC(GPIO) | PAD_RESET(rst) | PAD_CFG0_TX_DISABLE | \
PAD_IRQ_CFG(IOAPIC, trig, inv), PAD_PULL(pull))
/* General purpose input, routed to SMI */
#define PAD_CFG_GPI_SMI(pad, pull, rst, trig, inv) \
_PAD_CFG_STRUCT(pad, \
PAD_FUNC(GPIO) | PAD_RESET(rst) | PAD_CFG0_TX_DISABLE | \
PAD_IRQ_CFG(SMI, trig, inv), PAD_PULL(pull))
/* General purpose input, routed to SCI */
#define PAD_CFG_GPI_SCI(pad, pull, rst, trig, inv) \
_PAD_CFG_STRUCT(pad, \
PAD_FUNC(GPIO) | PAD_RESET(rst) | PAD_CFG0_TX_DISABLE | \
PAD_IRQ_CFG(SCI, trig, inv), PAD_PULL(pull))
/* General purpose input, routed to NMI */
#define PAD_CFG_GPI_NMI(pad, pull, rst, trig, inv) \
_PAD_CFG_STRUCT(pad, \
PAD_FUNC(GPIO) | PAD_RESET(rst) | PAD_CFG0_TX_DISABLE | \
PAD_IRQ_CFG(NMI, trig, inv), PAD_PULL(pull))
struct pad_config {
uint32_t config0;
uint16_t config1;
uint16_t pad;
};
/*
* Configuration for raw pads. Some pads are designated as only special function
* pins, and don't have an associated GPIO number, so we need to expose the raw
* pad configuration functionality.
*/
void gpio_configure_pad(const struct pad_config *cfg);
void gpio_configure_pads(const struct pad_config *cfg, size_t num_pads);
#endif /* _SOC_APOLLOLAKE_GPIO_H_ */
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