1 /* $NetBSD: gpiovar.h,v 1.16 2016/05/11 18:33:40 bouyer Exp $ */ 2 /* $OpenBSD: gpiovar.h,v 1.3 2006/01/14 12:33:49 grange Exp $ */ 3 4 /* 5 * Copyright (c) 2004, 2006 Alexander Yurchenko <grange@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #ifndef _DEV_GPIO_GPIOVAR_H_ 21 #define _DEV_GPIO_GPIOVAR_H_ 22 23 #include <sys/device.h> 24 25 /* GPIO controller description */ 26 typedef struct gpio_chipset_tag { 27 void *gp_cookie; 28 29 int (*gp_gc_open)(void *, device_t); 30 void (*gp_gc_close)(void *, device_t); 31 int (*gp_pin_read)(void *, int); 32 void (*gp_pin_write)(void *, int, int); 33 void (*gp_pin_ctl)(void *, int, int); 34 void (*gp_pin_irqen)(void *, int, bool); 35 } *gpio_chipset_tag_t; 36 37 /* GPIO pin description */ 38 typedef struct gpio_pin { 39 int pin_num; /* number */ 40 int pin_caps; /* capabilities */ 41 int pin_flags; /* current configuration */ 42 int pin_state; /* current state */ 43 int pin_mapped; /* is mapped */ 44 gpio_chipset_tag_t pin_gc; /* reference the controller */ 45 void (*pin_callback)(void *); /* irq callback */ 46 void * pin_callback_arg; /* callback arg */ 47 } gpio_pin_t; 48 49 /* Attach GPIO framework to the controller */ 50 struct gpiobus_attach_args { 51 gpio_chipset_tag_t gba_gc; /* underlying controller */ 52 gpio_pin_t *gba_pins; /* pins array */ 53 int gba_npins; /* total number of pins */ 54 }; 55 56 int gpiobus_print(void *, const char *); 57 58 /* GPIO framework private methods */ 59 #define gpiobus_open(gc, dev) \ 60 ((gc)->gp_gc_open ? ((gc)->gp_gc_open((gc)->gp_cookie, dev)) : 0) 61 #define gpiobus_close(gc, dev) \ 62 ((gc)->gp_gc_close ? ((gc)->gp_gc_close((gc)->gp_cookie, dev)), 1 : 0) 63 #define gpiobus_pin_read(gc, pin) \ 64 ((gc)->gp_pin_read((gc)->gp_cookie, (pin))) 65 #define gpiobus_pin_write(gc, pin, value) \ 66 ((gc)->gp_pin_write((gc)->gp_cookie, (pin), (value))) 67 #define gpiobus_pin_ctl(gc, pin, flags) \ 68 ((gc)->gp_pin_ctl((gc)->gp_cookie, (pin), (flags))) 69 #define gpiobus_pin_irqen(gc, pin, en) \ 70 ((gc)->gp_pin_irqen((gc)->gp_cookie, (pin), (en))) 71 72 /* Attach devices connected to the GPIO pins */ 73 struct gpio_attach_args { 74 void *ga_gpio; 75 int ga_offset; 76 uint32_t ga_mask; 77 char *ga_dvname; 78 uint32_t ga_flags; 79 }; 80 81 /* GPIO pin map */ 82 struct gpio_pinmap { 83 int *pm_map; /* pin map */ 84 int pm_size; /* map size */ 85 }; 86 87 struct gpio_dev { 88 device_t sc_dev; /* the gpio device */ 89 LIST_ENTRY(gpio_dev) sc_next; 90 }; 91 92 struct gpio_name { 93 char gp_name[GPIOMAXNAME]; 94 int gp_pin; 95 LIST_ENTRY(gpio_name) gp_next; 96 }; 97 98 void * gpio_find_device(const char *); 99 const char * gpio_get_name(void *gpio); 100 int gpio_pin_can_map(void *, int, uint32_t); 101 int gpio_pin_map(void *, int, uint32_t, struct gpio_pinmap *); 102 void gpio_pin_unmap(void *, struct gpio_pinmap *); 103 int gpio_pin_read(void *, struct gpio_pinmap *, int); 104 void gpio_pin_write(void *, struct gpio_pinmap *, int, int); 105 void gpio_pin_ctl(void *, struct gpio_pinmap *, int, int); 106 int gpio_pin_ctl_intr(void *, struct gpio_pinmap *, int, int, 107 int, void (*)(void *), void *); 108 void gpio_pin_irqen(void *, struct gpio_pinmap *, int, bool); 109 int gpio_pin_caps(void *, struct gpio_pinmap *, int); 110 int gpio_pin_wait(void *, int); 111 int gpio_npins(uint32_t); 112 113 int gpio_lock(void *); 114 void gpio_unlock(void *); 115 116 void gpio_intr(device_t, u_int32_t); 117 118 #endif /* !_DEV_GPIO_GPIOVAR_H_ */ 119