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ofw_pwm.c
(2.94 KB)
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ofw_pwm.h
(2.09 KB)
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ofw_pwmbus.c
(6.22 KB)
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pwm_backlight.c
(8.44 KB)
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pwmbus.c
(7.25 KB)
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pwmbus.h
(2.31 KB)
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pwmbus_if.m
(2.6 KB)
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pwmc.c
(4.84 KB)
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pwmc.h
(1.68 KB)
Editing: pwmc.c
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org> * * 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 "opt_platform.h" #include <sys/param.h> #include <sys/systm.h> #include <sys/bus.h> #include <sys/conf.h> #include <sys/kernel.h> #include <sys/module.h> #include <sys/time.h> #include <dev/pwm/pwmbus.h> #include <dev/pwm/pwmc.h> #include "pwmbus_if.h" #ifdef FDT #include <dev/ofw/openfirm.h> #include <dev/ofw/ofw_bus.h> #include <dev/ofw/ofw_bus_subr.h> static struct ofw_compat_data compat_data[] = { {"freebsd,pwmc", true}, {NULL, false}, }; PWMBUS_FDT_PNP_INFO(compat_data); #endif struct pwmc_softc { device_t dev; struct cdev *cdev; u_int chan; }; static int pwm_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td) { struct pwmc_softc *sc; struct pwm_state state; device_t bus; int rv = 0; sc = dev->si_drv1; bus = device_get_parent(sc->dev); switch (cmd) { case PWMSETSTATE: bcopy(data, &state, sizeof(state)); rv = PWMBUS_CHANNEL_CONFIG(bus, sc->chan, state.period, state.duty); if (rv == 0) rv = PWMBUS_CHANNEL_ENABLE(bus, sc->chan, state.enable); break; case PWMGETSTATE: bcopy(data, &state, sizeof(state)); rv = PWMBUS_CHANNEL_GET_CONFIG(bus, sc->chan, &state.period, &state.duty); if (rv != 0) return (rv); rv = PWMBUS_CHANNEL_IS_ENABLED(bus, sc->chan, &state.enable); if (rv != 0) return (rv); bcopy(&state, data, sizeof(state)); break; } return (rv); } static struct cdevsw pwm_cdevsw = { .d_version = D_VERSION, .d_name = "pwmc", .d_ioctl = pwm_ioctl }; static void pwmc_setup_label(struct pwmc_softc *sc) { const char *hintlabel; #ifdef FDT void *label; if (OF_getprop_alloc(ofw_bus_get_node(sc->dev), "label", &label) > 0) { make_dev_alias(sc->cdev, "pwm/%s", (char *)label); OF_prop_free(label); } #endif if (resource_string_value(device_get_name(sc->dev), device_get_unit(sc->dev), "label", &hintlabel) == 0) { make_dev_alias(sc->cdev, "pwm/%s", hintlabel); } } static int pwmc_probe(device_t dev) { int rv; rv = BUS_PROBE_NOWILDCARD; #ifdef FDT if (!ofw_bus_status_okay(dev)) return (ENXIO); if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { rv = BUS_PROBE_DEFAULT; } #endif device_set_desc(dev, "PWM Control"); return (rv); } static int pwmc_attach(device_t dev) { struct pwmc_softc *sc; struct make_dev_args args; int error; sc = device_get_softc(dev); sc->dev = dev; if ((error = pwmbus_get_channel(dev, &sc->chan)) != 0) return (error); make_dev_args_init(&args); args.mda_flags = MAKEDEV_CHECKNAME | MAKEDEV_WAITOK; args.mda_devsw = &pwm_cdevsw; args.mda_uid = UID_ROOT; args.mda_gid = GID_OPERATOR; args.mda_mode = 0660; args.mda_si_drv1 = sc; error = make_dev_s(&args, &sc->cdev, "pwm/pwmc%d.%d", device_get_unit(device_get_parent(dev)), sc->chan); if (error != 0) { device_printf(dev, "Failed to make PWM device\n"); return (error); } pwmc_setup_label(sc); return (0); } static int pwmc_detach(device_t dev) { struct pwmc_softc *sc; sc = device_get_softc(dev); destroy_dev(sc->cdev); return (0); } static device_method_t pwmc_methods[] = { /* device_if */ DEVMETHOD(device_probe, pwmc_probe), DEVMETHOD(device_attach, pwmc_attach), DEVMETHOD(device_detach, pwmc_detach), DEVMETHOD_END }; static driver_t pwmc_driver = { "pwmc", pwmc_methods, sizeof(struct pwmc_softc), }; static devclass_t pwmc_devclass; DRIVER_MODULE(pwmc, pwmbus, pwmc_driver, pwmc_devclass, 0, 0); MODULE_DEPEND(pwmc, pwmbus, 1, 1, 1); MODULE_VERSION(pwmc, 1);
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