2 * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
35 #include <sys/ioccom.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/module.h>
40 #include <dev/gpio/gpiobusvar.h>
46 #define dprintf printf
48 #define dprintf(x, arg...)
51 static int gpioc_probe(device_t dev);
52 static int gpioc_attach(device_t dev);
53 static int gpioc_detach(device_t dev);
55 static d_ioctl_t gpioc_ioctl;
57 static struct cdevsw gpioc_cdevsw = {
58 .d_version = D_VERSION,
59 .d_ioctl = gpioc_ioctl,
64 device_t sc_dev; /* gpiocX dev */
65 device_t sc_pdev; /* gpioX dev */
66 struct cdev *sc_ctl_dev; /* controller device */
71 gpioc_probe(device_t dev)
73 device_set_desc(dev, "GPIO controller");
78 gpioc_attach(device_t dev)
80 struct gpioc_softc *sc = device_get_softc(dev);
83 sc->sc_pdev = device_get_parent(dev);
84 sc->sc_unit = device_get_unit(dev);
85 sc->sc_ctl_dev = make_dev(&gpioc_cdevsw, sc->sc_unit,
86 UID_ROOT, GID_WHEEL, 0600, "gpioc%d", sc->sc_unit);
87 if (!sc->sc_ctl_dev) {
88 printf("Failed to create gpioc%d", sc->sc_unit);
91 sc->sc_ctl_dev->si_drv1 = sc;
97 gpioc_detach(device_t dev)
99 struct gpioc_softc *sc = device_get_softc(dev);
103 destroy_dev(sc->sc_ctl_dev);
105 if ((err = bus_generic_detach(dev)) != 0)
112 gpioc_ioctl(struct cdev *cdev, u_long cmd, caddr_t arg, int fflag,
116 struct gpioc_softc *sc = cdev->si_drv1;
124 res = GPIO_PIN_MAX(sc->sc_pdev, &max_pin);
125 bcopy(&max_pin, arg, sizeof(max_pin));
128 bcopy(arg, &pin, sizeof(pin));
129 dprintf("get config pin %d\n", pin.gp_pin);
130 res = GPIO_PIN_GETFLAGS(sc->sc_pdev, pin.gp_pin,
135 GPIO_PIN_GETCAPS(sc->sc_pdev, pin.gp_pin, &pin.gp_caps);
136 GPIO_PIN_GETNAME(sc->sc_pdev, pin.gp_pin, pin.gp_name);
137 bcopy(&pin, arg, sizeof(pin));
140 bcopy(arg, &pin, sizeof(pin));
141 dprintf("set config pin %d\n", pin.gp_pin);
142 res = GPIO_PIN_GETCAPS(sc->sc_pdev, pin.gp_pin, &caps);
144 res = gpio_check_flags(caps, pin.gp_flags);
146 res = GPIO_PIN_SETFLAGS(sc->sc_pdev, pin.gp_pin,
150 bcopy(arg, &req, sizeof(req));
151 res = GPIO_PIN_GET(sc->sc_pdev, req.gp_pin,
153 dprintf("read pin %d -> %d\n",
154 req.gp_pin, req.gp_value);
155 bcopy(&req, arg, sizeof(req));
158 bcopy(arg, &req, sizeof(req));
159 res = GPIO_PIN_SET(sc->sc_pdev, req.gp_pin,
161 dprintf("write pin %d -> %d\n",
162 req.gp_pin, req.gp_value);
165 bcopy(arg, &req, sizeof(req));
166 dprintf("toggle pin %d\n",
168 res = GPIO_PIN_TOGGLE(sc->sc_pdev, req.gp_pin);
178 static device_method_t gpioc_methods[] = {
179 /* Device interface */
180 DEVMETHOD(device_probe, gpioc_probe),
181 DEVMETHOD(device_attach, gpioc_attach),
182 DEVMETHOD(device_detach, gpioc_detach),
183 DEVMETHOD(device_shutdown, bus_generic_shutdown),
184 DEVMETHOD(device_suspend, bus_generic_suspend),
185 DEVMETHOD(device_resume, bus_generic_resume),
190 driver_t gpioc_driver = {
193 sizeof(struct gpioc_softc)
196 devclass_t gpioc_devclass;
198 DRIVER_MODULE(gpioc, gpio, gpioc_driver, gpioc_devclass, 0, 0);
199 MODULE_VERSION(gpioc, 1);