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/* $OpenBSD: ofw_gpio.h,v 1.5 2020/12/18 22:14:13 kettenis Exp $ */
/*
* Copyright (c) 2016 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _DEV_OFW_GPIO_H_
#define _DEV_OFW_GPIO_H_
#define GPIO_ACTIVE_HIGH (0 << 0)
#define GPIO_ACTIVE_LOW (1 << 0)
#define GPIO_PUSH_PULL (0 << 1)
#define GPIO_SINGLE_ENDED (1 << 1)
#define GPIO_LINE_OPEN_SOURCE (0 << 2)
#define GPIO_LINE_OPEN_DRAIN (1 << 2)
#define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_DRAIN)
#define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_SOURCE)
struct gpio_controller {
int gc_node;
void *gc_cookie;
void (*gc_config_pin)(void *, uint32_t *, int);
int (*gc_get_pin)(void *, uint32_t *);
void (*gc_set_pin)(void *, uint32_t *, int);
LIST_ENTRY(gpio_controller) gc_list;
uint32_t gc_phandle;
uint32_t gc_cells;
};
void gpio_controller_register(struct gpio_controller *);
#define GPIO_CONFIG_INPUT 0x0000
#define GPIO_CONFIG_OUTPUT 0x0001
#define GPIO_CONFIG_PULL_UP 0x0010
#define GPIO_CONFIG_PULL_DOWN 0x0020
#define GPIO_CONFIG_MD0 0x1000
#define GPIO_CONFIG_MD1 0x2000
#define GPIO_CONFIG_MD2 0x4000
#define GPIO_CONFIG_MD3 0x8000
void gpio_controller_config_pin(uint32_t *, int);
int gpio_controller_get_pin(uint32_t *);
void gpio_controller_set_pin(uint32_t *, int);
uint32_t *gpio_controller_next_pin(uint32_t *);
#endif /* _DEV_OFW_GPIO_H_ */
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