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 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/11/sys/dev/gpio/gpioc.c 324755 2017-10-19 16:07:57Z ian $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/bus.h> 33#include <sys/conf.h> 34#include <sys/gpio.h> 35#include <sys/ioccom.h> 36#include <sys/kernel.h> 37#include <sys/malloc.h> 38#include <sys/module.h> 39 40#include <dev/gpio/gpiobusvar.h> 41 42#include "gpio_if.h" 43#include "gpiobus_if.h" 44 45#undef GPIOC_DEBUG 46#ifdef GPIOC_DEBUG 47#define dprintf printf 48#else 49#define dprintf(x, arg...) 50#endif 51 52static int gpioc_probe(device_t dev); 53static int gpioc_attach(device_t dev); 54static int gpioc_detach(device_t dev); 55 56static d_ioctl_t gpioc_ioctl; 57 58static struct cdevsw gpioc_cdevsw = { 59 .d_version = D_VERSION, 60 .d_ioctl = gpioc_ioctl, 61 .d_name = "gpioc", 62}; 63 64struct gpioc_softc { 65 device_t sc_dev; /* gpiocX dev */ 66 device_t sc_pdev; /* gpioX dev */ 67 struct cdev *sc_ctl_dev; /* controller device */ 68 int sc_unit; 69}; 70 71static int 72gpioc_probe(device_t dev) 73{ 74 device_set_desc(dev, "GPIO controller"); 75 return (0); 76} 77 78static int 79gpioc_attach(device_t dev) 80{ 81 int err; 82 struct gpioc_softc *sc; 83 struct make_dev_args devargs; 84 85 sc = device_get_softc(dev); 86 sc->sc_dev = dev; 87 sc->sc_pdev = device_get_parent(dev); 88 sc->sc_unit = device_get_unit(dev); 89 make_dev_args_init(&devargs); 90 devargs.mda_devsw = &gpioc_cdevsw; 91 devargs.mda_uid = UID_ROOT; 92 devargs.mda_gid = GID_WHEEL; 93 devargs.mda_mode = 0600; 94 devargs.mda_si_drv1 = sc; 95 err = make_dev_s(&devargs, &sc->sc_ctl_dev, "gpioc%d", sc->sc_unit); 96 if (err != 0) { 97 printf("Failed to create gpioc%d", sc->sc_unit); 98 return (ENXIO); 99 } 100 101 return (0); 102} 103 104static int 105gpioc_detach(device_t dev) 106{ 107 struct gpioc_softc *sc = device_get_softc(dev); 108 int err; 109 110 if (sc->sc_ctl_dev) 111 destroy_dev(sc->sc_ctl_dev); 112 113 if ((err = bus_generic_detach(dev)) != 0) 114 return (err); 115 116 return (0); 117} 118 119static int 120gpioc_ioctl(struct cdev *cdev, u_long cmd, caddr_t arg, int fflag, 121 struct thread *td) 122{ 123 device_t bus; 124 int max_pin, res; 125 struct gpioc_softc *sc = cdev->si_drv1; 126 struct gpio_pin pin; 127 struct gpio_req req; 128 struct gpio_access_32 *a32; 129 struct gpio_config_32 *c32; 130 uint32_t caps; 131 132 bus = GPIO_GET_BUS(sc->sc_pdev); 133 if (bus == NULL) 134 return (EINVAL); 135 switch (cmd) { 136 case GPIOMAXPIN: 137 max_pin = -1; 138 res = GPIO_PIN_MAX(sc->sc_pdev, &max_pin); 139 bcopy(&max_pin, arg, sizeof(max_pin)); 140 break; 141 case GPIOGETCONFIG: 142 bcopy(arg, &pin, sizeof(pin)); 143 dprintf("get config pin %d\n", pin.gp_pin); 144 res = GPIO_PIN_GETFLAGS(sc->sc_pdev, pin.gp_pin, 145 &pin.gp_flags); 146 /* Fail early */ 147 if (res) 148 break; 149 GPIO_PIN_GETCAPS(sc->sc_pdev, pin.gp_pin, &pin.gp_caps); 150 GPIOBUS_PIN_GETNAME(bus, pin.gp_pin, pin.gp_name); 151 bcopy(&pin, arg, sizeof(pin)); 152 break; 153 case GPIOSETCONFIG: 154 bcopy(arg, &pin, sizeof(pin)); 155 dprintf("set config pin %d\n", pin.gp_pin); 156 res = GPIO_PIN_GETCAPS(sc->sc_pdev, pin.gp_pin, &caps); 157 if (res == 0) 158 res = gpio_check_flags(caps, pin.gp_flags); 159 if (res == 0) 160 res = GPIO_PIN_SETFLAGS(sc->sc_pdev, pin.gp_pin, 161 pin.gp_flags); 162 break; 163 case GPIOGET: 164 bcopy(arg, &req, sizeof(req)); 165 res = GPIO_PIN_GET(sc->sc_pdev, req.gp_pin, 166 &req.gp_value); 167 dprintf("read pin %d -> %d\n", 168 req.gp_pin, req.gp_value); 169 bcopy(&req, arg, sizeof(req)); 170 break; 171 case GPIOSET: 172 bcopy(arg, &req, sizeof(req)); 173 res = GPIO_PIN_SET(sc->sc_pdev, req.gp_pin, 174 req.gp_value); 175 dprintf("write pin %d -> %d\n", 176 req.gp_pin, req.gp_value); 177 break; 178 case GPIOTOGGLE: 179 bcopy(arg, &req, sizeof(req)); 180 dprintf("toggle pin %d\n", 181 req.gp_pin); 182 res = GPIO_PIN_TOGGLE(sc->sc_pdev, req.gp_pin); 183 break; 184 case GPIOSETNAME: 185 bcopy(arg, &pin, sizeof(pin)); 186 dprintf("set name on pin %d\n", pin.gp_pin); 187 res = GPIOBUS_PIN_SETNAME(bus, pin.gp_pin, 188 pin.gp_name); 189 break; 190 case GPIOACCESS32: 191 a32 = (struct gpio_access_32 *)arg; 192 res = GPIO_PIN_ACCESS_32(sc->sc_pdev, a32->first_pin, 193 a32->clear_pins, a32->orig_pins, &a32->orig_pins); 194 break; 195 case GPIOCONFIG32: 196 c32 = (struct gpio_config_32 *)arg; 197 res = GPIO_PIN_CONFIG_32(sc->sc_pdev, c32->first_pin, 198 c32->num_pins, c32->pin_flags); 199 break; 200 default: 201 return (ENOTTY); 202 break; 203 } 204 205 return (res); 206} 207 208static device_method_t gpioc_methods[] = { 209 /* Device interface */ 210 DEVMETHOD(device_probe, gpioc_probe), 211 DEVMETHOD(device_attach, gpioc_attach), 212 DEVMETHOD(device_detach, gpioc_detach), 213 DEVMETHOD(device_shutdown, bus_generic_shutdown), 214 DEVMETHOD(device_suspend, bus_generic_suspend), 215 DEVMETHOD(device_resume, bus_generic_resume), 216 217 DEVMETHOD_END 218}; 219 220driver_t gpioc_driver = { 221 "gpioc", 222 gpioc_methods, 223 sizeof(struct gpioc_softc) 224}; 225 226devclass_t gpioc_devclass; 227 228DRIVER_MODULE(gpioc, gpio, gpioc_driver, gpioc_devclass, 0, 0); 229MODULE_VERSION(gpioc, 1); 230