1 /* $OpenBSD: ofw_gpio.h,v 1.6 2025/01/09 19:38:13 kettenis Exp $ */ 2 /* 3 * Copyright (c) 2016 Mark Kettenis 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef _DEV_OFW_GPIO_H_ 19 #define _DEV_OFW_GPIO_H_ 20 21 #define GPIO_ACTIVE_HIGH (0 << 0) 22 #define GPIO_ACTIVE_LOW (1 << 0) 23 #define GPIO_PUSH_PULL (0 << 1) 24 #define GPIO_SINGLE_ENDED (1 << 1) 25 #define GPIO_LINE_OPEN_SOURCE (0 << 2) 26 #define GPIO_LINE_OPEN_DRAIN (1 << 2) 27 28 #define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_DRAIN) 29 #define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_SOURCE) 30 31 struct gpio_controller { 32 int gc_node; 33 void *gc_cookie; 34 void (*gc_config_pin)(void *, uint32_t *, int); 35 int (*gc_get_pin)(void *, uint32_t *); 36 void (*gc_set_pin)(void *, uint32_t *, int); 37 void *(*gc_intr_establish)(void *, uint32_t *, int, 38 struct cpu_info *, int (*)(void *), void *, char *); 39 40 LIST_ENTRY(gpio_controller) gc_list; 41 uint32_t gc_phandle; 42 uint32_t gc_cells; 43 }; 44 45 void gpio_controller_register(struct gpio_controller *); 46 47 #define GPIO_CONFIG_INPUT 0x0000 48 #define GPIO_CONFIG_OUTPUT 0x0001 49 #define GPIO_CONFIG_PULL_UP 0x0010 50 #define GPIO_CONFIG_PULL_DOWN 0x0020 51 #define GPIO_CONFIG_MD0 0x1000 52 #define GPIO_CONFIG_MD1 0x2000 53 #define GPIO_CONFIG_MD2 0x4000 54 #define GPIO_CONFIG_MD3 0x8000 55 void gpio_controller_config_pin(uint32_t *, int); 56 57 int gpio_controller_get_pin(uint32_t *); 58 void gpio_controller_set_pin(uint32_t *, int); 59 uint32_t *gpio_controller_next_pin(uint32_t *); 60 61 void *gpio_controller_intr_establish(uint32_t *, int, struct cpu_info *, 62 int (*)(void *), void *, char *); 63 void gpio_controller_intr_disestablish(void *); 64 65 #endif /* _DEV_OFW_GPIO_H_ */ 66