/*- * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/bus.h> #include <sys/conf.h> #include <sys/gpio.h> #include <sys/ioccom.h> #include <sys/kernel.h> #include <sys/malloc.h> #include <sys/module.h> #include <dev/gpio/gpiobusvar.h> #include "gpio_if.h" #include "gpiobus_if.h" #undef GPIOC_DEBUG #ifdef GPIOC_DEBUG #define dprintf printf #else #define dprintf(x, arg...) #endif static int gpioc_probe(device_t dev); static int gpioc_attach(device_t dev); static int gpioc_detach(device_t dev); static d_ioctl_t gpioc_ioctl; static struct cdevsw gpioc_cdevsw = { .d_version = D_VERSION, .d_ioctl = gpioc_ioctl, .d_name = "gpioc", }; struct gpioc_softc { device_t sc_dev; /* gpiocX dev */ device_t sc_pdev; /* gpioX dev */ struct cdev *sc_ctl_dev; /* controller device */ int sc_unit; }; static int gpioc_probe(device_t dev) { device_set_desc(dev, "GPIO controller"); return (0); } static int gpioc_attach(device_t dev) { struct gpioc_softc *sc = device_get_softc(dev); sc->sc_dev = dev; sc->sc_pdev = device_get_parent(dev); sc->sc_unit = device_get_unit(dev); sc->sc_ctl_dev = make_dev(&gpioc_cdevsw, sc->sc_unit, UID_ROOT, GID_WHEEL, 0600, "gpioc%d", sc->sc_unit); if (!sc->sc_ctl_dev) { printf("Failed to create gpioc%d", sc->sc_unit); return (ENXIO); } sc->sc_ctl_dev->si_drv1 = sc; return (0); } static int gpioc_detach(device_t dev) { struct gpioc_softc *sc = device_get_softc(dev); int err; if (sc->sc_ctl_dev) destroy_dev(sc->sc_ctl_dev); if ((err = bus_generic_detach(dev)) != 0) return (err); return (0); } static int gpioc_ioctl(struct cdev *cdev, u_long cmd, caddr_t arg, int fflag, struct thread *td) { device_t bus; int max_pin, res; struct gpioc_softc *sc = cdev->si_drv1; struct gpio_pin pin; struct gpio_req req; uint32_t caps; bus = GPIO_GET_BUS(sc->sc_pdev); if (bus == NULL) return (EINVAL); switch (cmd) { case GPIOMAXPIN: max_pin = -1; res = GPIO_PIN_MAX(sc->sc_pdev, &max_pin); bcopy(&max_pin, arg, sizeof(max_pin)); break; case GPIOGETCONFIG: bcopy(arg, &pin, sizeof(pin)); dprintf("get config pin %d\n", pin.gp_pin); res = GPIO_PIN_GETFLAGS(sc->sc_pdev, pin.gp_pin, &pin.gp_flags); /* Fail early */ if (res) break; GPIO_PIN_GETCAPS(sc->sc_pdev, pin.gp_pin, &pin.gp_caps); GPIOBUS_PIN_GETNAME(bus, pin.gp_pin, pin.gp_name); bcopy(&pin, arg, sizeof(pin)); break; case GPIOSETCONFIG: bcopy(arg, &pin, sizeof(pin)); dprintf("set config pin %d\n", pin.gp_pin); res = GPIO_PIN_GETCAPS(sc->sc_pdev, pin.gp_pin, &caps); if (res == 0) res = gpio_check_flags(caps, pin.gp_flags); if (res == 0) res = GPIO_PIN_SETFLAGS(sc->sc_pdev, pin.gp_pin, pin.gp_flags); break; case GPIOGET: bcopy(arg, &req, sizeof(req)); res = GPIO_PIN_GET(sc->sc_pdev, req.gp_pin, &req.gp_value); dprintf("read pin %d -> %d\n", req.gp_pin, req.gp_value); bcopy(&req, arg, sizeof(req)); break; case GPIOSET: bcopy(arg, &req, sizeof(req)); res = GPIO_PIN_SET(sc->sc_pdev, req.gp_pin, req.gp_value); dprintf("write pin %d -> %d\n", req.gp_pin, req.gp_value); break; case GPIOTOGGLE: bcopy(arg, &req, sizeof(req)); dprintf("toggle pin %d\n", req.gp_pin); res = GPIO_PIN_TOGGLE(sc->sc_pdev, req.gp_pin); break; case GPIOSETNAME: bcopy(arg, &pin, sizeof(pin)); dprintf("set name on pin %d\n", pin.gp_pin); res = GPIOBUS_PIN_SETNAME(bus, pin.gp_pin, pin.gp_name); break; default: return (ENOTTY); break; } return (res); } static device_method_t gpioc_methods[] = { /* Device interface */ DEVMETHOD(device_probe, gpioc_probe), DEVMETHOD(device_attach, gpioc_attach), DEVMETHOD(device_detach, gpioc_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), { 0, 0 } }; driver_t gpioc_driver = { "gpioc", gpioc_methods, sizeof(struct gpioc_softc) }; devclass_t gpioc_devclass; DRIVER_MODULE(gpioc, gpio, gpioc_driver, gpioc_devclass, 0, 0); MODULE_VERSION(gpioc, 1);