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 device_t 36 gpio_default_get_bus(void) 37 { 38 39 return (NULL); 40 } 41 42 static int 43 gpio_default_nosupport(void) 44 { 45 46 return (EOPNOTSUPP); 47 } 48 49 static int 50 gpio_default_map_gpios(device_t bus, phandle_t dev, 51 phandle_t gparent, int gcells, pcell_t *gpios, uint32_t *pin, 52 uint32_t *flags) 53 { 54 /* Propagate up the bus hierarchy until someone handles it. */ 55 if (device_get_parent(bus) != NULL) 56 return (GPIO_MAP_GPIOS(device_get_parent(bus), dev, 57 gparent, gcells, gpios, pin, flags)); 58 59 /* If that fails, then assume the FreeBSD defaults. */ 60 *pin = gpios[0]; 61 if (gcells == 2 || gcells == 3) 62 *flags = gpios[gcells - 1]; 63 64 return (0); 65 } 66}; 67 68HEADER { 69 #include <dev/ofw/openfirm.h> 70}; 71 72# 73# Return the gpiobus device reference 74# 75METHOD device_t get_bus { 76 device_t dev; 77} DEFAULT gpio_default_get_bus; 78 79# 80# Get maximum pin number 81# 82METHOD int pin_max { 83 device_t dev; 84 int *maxpin; 85}; 86 87# 88# Set value of pin specifed by pin_num 89# 90METHOD int pin_set { 91 device_t dev; 92 uint32_t pin_num; 93 uint32_t pin_value; 94}; 95 96# 97# Get value of pin specifed by pin_num 98# 99METHOD int pin_get { 100 device_t dev; 101 uint32_t pin_num; 102 uint32_t *pin_value; 103}; 104 105# 106# Toggle value of pin specifed by pin_num 107# 108METHOD int pin_toggle { 109 device_t dev; 110 uint32_t pin_num; 111}; 112 113# 114# Get pin capabilities 115# 116METHOD int pin_getcaps { 117 device_t dev; 118 uint32_t pin_num; 119 uint32_t *caps; 120}; 121 122# 123# Get pin flags 124# 125METHOD int pin_getflags { 126 device_t dev; 127 uint32_t pin_num; 128 uint32_t *flags; 129}; 130 131# 132# Get pin name 133# 134METHOD int pin_getname { 135 device_t dev; 136 uint32_t pin_num; 137 char *name; 138}; 139 140# 141# Set current configuration and capabilities 142# 143METHOD int pin_setflags { 144 device_t dev; 145 uint32_t pin_num; 146 uint32_t flags; 147}; 148 149# 150# Allow the GPIO controller to map the gpio-specifier on its own. 151# 152METHOD int map_gpios { 153 device_t bus; 154 phandle_t dev; 155 phandle_t gparent; 156 int gcells; 157 pcell_t *gpios; 158 uint32_t *pin; 159 uint32_t *flags; 160} DEFAULT gpio_default_map_gpios; 161 162# 163# Simultaneously read and/or change up to 32 adjacent pins. 164# If the device cannot change the pins simultaneously, returns EOPNOTSUPP. 165# 166# More details about using this interface can be found in sys/gpio.h 167# 168METHOD int pin_access_32 { 169 device_t dev; 170 uint32_t first_pin; 171 uint32_t clear_pins; 172 uint32_t change_pins; 173 uint32_t *orig_pins; 174} DEFAULT gpio_default_nosupport; 175 176# 177# Simultaneously configure up to 32 adjacent pins. 178# This is intended to change the configuration of all the pins simultaneously, 179# but unlike pin_access_32, this will not fail if the hardware can't do so. 180# 181# More details about using this interface can be found in sys/gpio.h 182# 183METHOD int pin_config_32 { 184 device_t dev; 185 uint32_t first_pin; 186 uint32_t num_pins; 187 uint32_t *pin_flags; 188} DEFAULT gpio_default_nosupport; 189