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