1#- 2# Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org> 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24# SUCH DAMAGE. 25# 26# $FreeBSD$ 27# 28 29#include <sys/bus.h> 30#include <sys/gpio.h> 31 32INTERFACE gpio; 33 34CODE { 35 static int 36 gpio_default_map_gpios(device_t bus, phandle_t dev, 37 phandle_t gparent, int gcells, pcell_t *gpios, uint32_t *pin, 38 uint32_t *flags) 39 { 40 /* Propagate up the bus hierarchy until someone handles it. */ 41 if (device_get_parent(bus) != NULL) 42 return (GPIO_MAP_GPIOS(device_get_parent(bus), dev, 43 gparent, gcells, gpios, pin, flags)); 44 45 /* If that fails, then assume the FreeBSD defaults. */ 46 *pin = gpios[0]; 47 if (gcells == 2 || gcells == 3) 48 *flags = gpios[gcells - 1]; 49 50 return (0); 51 } 52}; 53 54HEADER { 55 #include <dev/ofw/openfirm.h> 56}; 57 58# 59# Get maximum pin number 60# 61METHOD int pin_max { 62 device_t dev; 63 int *maxpin; 64}; 65 66# 67# Set value of pin specifed by pin_num 68# 69METHOD int pin_set { 70 device_t dev; 71 uint32_t pin_num; 72 uint32_t pin_value; 73}; 74 75# 76# Get value of pin specifed by pin_num 77# 78METHOD int pin_get { 79 device_t dev; 80 uint32_t pin_num; 81 uint32_t *pin_value; 82}; 83 84# 85# Toggle value of pin specifed by pin_num 86# 87METHOD int pin_toggle { 88 device_t dev; 89 uint32_t pin_num; 90}; 91 92# 93# Get pin capabilities 94# 95METHOD int pin_getcaps { 96 device_t dev; 97 uint32_t pin_num; 98 uint32_t *caps; 99}; 100 101# 102# Get pin flags 103# 104METHOD int pin_getflags { 105 device_t dev; 106 uint32_t pin_num; 107 uint32_t *flags; 108}; 109 110# 111# Get pin name 112# 113METHOD int pin_getname { 114 device_t dev; 115 uint32_t pin_num; 116 char *name; 117}; 118 119# 120# Set current configuration and capabilities 121# 122METHOD int pin_setflags { 123 device_t dev; 124 uint32_t pin_num; 125 uint32_t flags; 126}; 127 128# 129# Allow the GPIO controller to map the gpio-specifier on its own. 130# 131METHOD int map_gpios { 132 device_t bus; 133 phandle_t dev; 134 phandle_t gparent; 135 int gcells; 136 pcell_t *gpios; 137 uint32_t *pin; 138 uint32_t *flags; 139} DEFAULT gpio_default_map_gpios; 140