1 /* $NetBSD: gpiovar.h,v 1.5 2008/04/29 14:07:36 cegger 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 /* GPIO controller description */ 24 typedef struct gpio_chipset_tag { 25 void *gp_cookie; 26 27 int (*gp_gc_open)(void *, device_t); 28 void (*gp_gc_close)(void *, device_t); 29 int (*gp_pin_read)(void *, int); 30 void (*gp_pin_write)(void *, int, int); 31 void (*gp_pin_ctl)(void *, int, int); 32 } *gpio_chipset_tag_t; 33 34 /* GPIO pin description */ 35 typedef struct gpio_pin { 36 int pin_num; /* number */ 37 int pin_caps; /* capabilities */ 38 int pin_flags; /* current configuration */ 39 int pin_state; /* current state */ 40 int pin_mapped; /* is mapped */ 41 } gpio_pin_t; 42 43 /* Attach GPIO framework to the controller */ 44 struct gpiobus_attach_args { 45 gpio_chipset_tag_t gba_gc; /* underlying controller */ 46 gpio_pin_t *gba_pins; /* pins array */ 47 int gba_npins; /* total number of pins */ 48 }; 49 50 int gpiobus_print(void *, const char *); 51 52 /* GPIO framework private methods */ 53 #define gpiobus_open(gc, dev) \ 54 ((gc)->gp_gc_open ? ((gc)->gp_gc_open((gc)->gp_cookie, dev)) : 0) 55 #define gpiobus_close(gc, dev) \ 56 ((gc)->gp_gc_close ? ((gc)->gp_gc_close((gc)->gp_cookie, dev)) : 0) 57 #define gpiobus_pin_read(gc, pin) \ 58 ((gc)->gp_pin_read((gc)->gp_cookie, (pin))) 59 #define gpiobus_pin_write(gc, pin, value) \ 60 ((gc)->gp_pin_write((gc)->gp_cookie, (pin), (value))) 61 #define gpiobus_pin_ctl(gc, pin, flags) \ 62 ((gc)->gp_pin_ctl((gc)->gp_cookie, (pin), (flags))) 63 64 /* Attach devices connected to the GPIO pins */ 65 struct gpio_attach_args { 66 void * ga_gpio; 67 int ga_offset; 68 u_int32_t ga_mask; 69 }; 70 71 /* GPIO pin map */ 72 struct gpio_pinmap { 73 int * pm_map; /* pin map */ 74 int pm_size; /* map size */ 75 }; 76 77 int gpio_pin_map(void *, int, u_int32_t, struct gpio_pinmap *); 78 void gpio_pin_unmap(void *, struct gpio_pinmap *); 79 int gpio_pin_read(void *, struct gpio_pinmap *, int); 80 void gpio_pin_write(void *, struct gpio_pinmap *, int, int); 81 void gpio_pin_ctl(void *, struct gpio_pinmap *, int, int); 82 int gpio_pin_caps(void *, struct gpio_pinmap *, int); 83 84 int gpio_npins(u_int32_t); 85 86 #endif /* !_DEV_GPIO_GPIOVAR_H_ */ 87