1 /* $NetBSD: gpiovar.h,v 1.10 2009/08/21 12:53:42 mbalmer 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 } *gpio_chipset_tag_t; 35 36 /* GPIO pin description */ 37 typedef struct gpio_pin { 38 int pin_num; /* number */ 39 int pin_caps; /* capabilities */ 40 int pin_flags; /* current configuration */ 41 int pin_state; /* current state */ 42 int pin_mapped; /* is mapped */ 43 } gpio_pin_t; 44 45 /* Attach GPIO framework to the controller */ 46 struct gpiobus_attach_args { 47 gpio_chipset_tag_t gba_gc; /* underlying controller */ 48 gpio_pin_t *gba_pins; /* pins array */ 49 int gba_npins; /* total number of pins */ 50 }; 51 52 int gpiobus_print(void *, const char *); 53 54 /* GPIO framework private methods */ 55 #define gpiobus_open(gc, dev) \ 56 ((gc)->gp_gc_open ? ((gc)->gp_gc_open((gc)->gp_cookie, dev)) : 0) 57 #define gpiobus_close(gc, dev) \ 58 ((gc)->gp_gc_close ? ((gc)->gp_gc_close((gc)->gp_cookie, dev)), 1 : 0) 59 #define gpiobus_pin_read(gc, pin) \ 60 ((gc)->gp_pin_read((gc)->gp_cookie, (pin))) 61 #define gpiobus_pin_write(gc, pin, value) \ 62 ((gc)->gp_pin_write((gc)->gp_cookie, (pin), (value))) 63 #define gpiobus_pin_ctl(gc, pin, flags) \ 64 ((gc)->gp_pin_ctl((gc)->gp_cookie, (pin), (flags))) 65 66 /* Attach devices connected to the GPIO pins */ 67 struct gpio_attach_args { 68 void * ga_gpio; 69 int ga_offset; 70 u_int32_t ga_mask; 71 char *ga_dvname; 72 }; 73 74 /* GPIO pin map */ 75 struct gpio_pinmap { 76 int * pm_map; /* pin map */ 77 int pm_size; /* map size */ 78 }; 79 80 struct gpio_dev { 81 device_t sc_dev; /* the gpio device */ 82 LIST_ENTRY(gpio_dev) sc_next; 83 }; 84 85 struct gpio_name { 86 char gp_name[GPIOMAXNAME]; 87 int gp_pin; 88 LIST_ENTRY(gpio_name) gp_next; 89 }; 90 91 int gpio_pin_can_map(void *, int, u_int32_t); 92 int gpio_pin_map(void *, int, u_int32_t, struct gpio_pinmap *); 93 void gpio_pin_unmap(void *, struct gpio_pinmap *); 94 int gpio_pin_read(void *, struct gpio_pinmap *, int); 95 void gpio_pin_write(void *, struct gpio_pinmap *, int, int); 96 void gpio_pin_ctl(void *, struct gpio_pinmap *, int, int); 97 int gpio_pin_caps(void *, struct gpio_pinmap *, int); 98 99 int gpio_npins(u_int32_t); 100 101 #endif /* !_DEV_GPIO_GPIOVAR_H_ */ 102