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>
32 #include <sys/types.h>
36 #include <sys/ioccom.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/queue.h>
41 #include <machine/bus.h>
42 #include <machine/resource.h>
49 #define dprintf printf
51 #define dprintf(x, arg...)
54 static int gpioc_probe(device_t dev);
55 static int gpioc_attach(device_t dev);
56 static int gpioc_detach(device_t dev);
58 static d_ioctl_t gpioc_ioctl;
60 static struct cdevsw gpioc_cdevsw = {
61 .d_version = D_VERSION,
62 .d_ioctl = gpioc_ioctl,
64 #if __FreeBSD_version >= 800039
65 .d_flags = D_PSEUDO | D_NEEDMINOR
70 device_t sc_dev; /* gpiocX dev */
71 device_t sc_pdev; /* gpioX dev */
72 struct cdev *sc_ctl_dev; /* controller device */
77 gpioc_probe(device_t dev)
79 device_set_desc(dev, "GPIO controller");
84 gpioc_attach(device_t dev)
86 struct gpioc_softc *sc = device_get_softc(dev);
89 sc->sc_pdev = device_get_parent(dev);
90 sc->sc_unit = device_get_unit(dev);
91 sc->sc_ctl_dev = make_dev(&gpioc_cdevsw, sc->sc_unit,
92 UID_ROOT, GID_WHEEL, 0600, "gpioc%d", sc->sc_unit);
93 if (!sc->sc_ctl_dev) {
94 printf("Failed to create gpioc%d", sc->sc_unit);
97 sc->sc_ctl_dev->si_drv1 = sc;
103 gpioc_detach(device_t dev)
105 struct gpioc_softc *sc = device_get_softc(dev);
109 destroy_dev(sc->sc_ctl_dev);
111 if ((err = bus_generic_detach(dev)) != 0)
118 gpioc_ioctl(struct cdev *cdev, u_long cmd, caddr_t arg, int fflag,
122 struct gpioc_softc *sc = cdev->si_drv1;
129 res = GPIO_PIN_MAX(sc->sc_pdev, &max_pin);
130 bcopy(&max_pin, arg, sizeof(max_pin));
133 bcopy(arg, &pin, sizeof(pin));
134 dprintf("get config pin %d\n", pin.gp_pin);
135 res = GPIO_PIN_GETFLAGS(sc->sc_pdev, pin.gp_pin,
140 GPIO_PIN_GETCAPS(sc->sc_pdev, pin.gp_pin, &pin.gp_caps);
141 GPIO_PIN_GETNAME(sc->sc_pdev, pin.gp_pin, pin.gp_name);
142 bcopy(&pin, arg, sizeof(pin));
145 bcopy(arg, &pin, sizeof(pin));
146 dprintf("set config pin %d\n", pin.gp_pin);
147 res = GPIO_PIN_SETFLAGS(sc->sc_pdev, pin.gp_pin,
151 bcopy(arg, &req, sizeof(req));
152 res = GPIO_PIN_GET(sc->sc_pdev, req.gp_pin,
154 dprintf("read pin %d -> %d\n",
155 req.gp_pin, req.gp_value);
156 bcopy(&req, arg, sizeof(req));
159 bcopy(arg, &req, sizeof(req));
160 res = GPIO_PIN_SET(sc->sc_pdev, req.gp_pin,
162 dprintf("write pin %d -> %d\n",
163 req.gp_pin, req.gp_value);
166 bcopy(arg, &req, sizeof(req));
167 dprintf("toggle pin %d\n",
169 res = GPIO_PIN_TOGGLE(sc->sc_pdev, req.gp_pin);
179 static device_method_t gpioc_methods[] = {
180 /* Device interface */
181 DEVMETHOD(device_probe, gpioc_probe),
182 DEVMETHOD(device_attach, gpioc_attach),
183 DEVMETHOD(device_detach, gpioc_detach),
184 DEVMETHOD(device_shutdown, bus_generic_shutdown),
185 DEVMETHOD(device_suspend, bus_generic_suspend),
186 DEVMETHOD(device_resume, bus_generic_resume),
191 driver_t gpioc_driver = {
194 sizeof(struct gpioc_softc)
197 devclass_t gpioc_devclass;
199 DRIVER_MODULE(gpioc, gpio, gpioc_driver, gpioc_devclass, 0, 0);
200 MODULE_VERSION(gpioc, 1);