/* $OpenBSD: isagpio.c,v 1.4 2009/03/29 21:53:52 sthen Exp $ */ /* * Copyright (c) 2006 Oleg Safiullin * 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 unmodified, 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 #include #include #include #include #include #include #include #define ISAGPIO_IOSIZE 1 #define ISAGPIO_NPINS 8 struct isagpio_softc { struct device sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; struct gpio_chipset_tag sc_gpio_gc; struct gpio_pin sc_gpio_pins[ISAGPIO_NPINS]; u_int8_t sc_gpio_mask; }; int isagpio_match(struct device *, void *, void *); void isagpio_attach(struct device *, struct device *, void *); int isagpio_pin_read(void *, int); void isagpio_pin_write(void *, int, int); void isagpio_pin_ctl(void *, int, int); struct cfattach isagpio_ca = { sizeof(struct isagpio_softc), isagpio_match, isagpio_attach }; struct cfdriver isagpio_cd = { NULL, "isagpio", DV_DULL }; int isagpio_match(struct device *parent, void *match, void *aux) { struct isa_attach_args *ia = aux; bus_space_handle_t ioh; if (ia->ia_iobase == -1 || bus_space_map(ia->ia_iot, ia->ia_iobase, ISAGPIO_IOSIZE, 0, &ioh) != 0) return (0); bus_space_unmap(ia->ia_iot, ioh, ISAGPIO_IOSIZE); ia->ia_iosize = ISAGPIO_IOSIZE; ia->ipa_nio = 1; ia->ipa_nmem = 0; ia->ipa_nirq = 0; ia->ipa_ndrq = 0; return (1); } void isagpio_attach(struct device *parent, struct device *self, void *aux) { struct isagpio_softc *sc = (void *)self; struct isa_attach_args *ia = aux; struct gpiobus_attach_args gba; int i; if (bus_space_map(ia->ia_iot, ia->ia_iobase, ia->ia_iosize, 0, &sc->sc_ioh) != 0) { printf(": can't map i/o space\n"); return; } printf("\n"); sc->sc_iot = ia->ia_iot; sc->sc_gpio_mask = 0; for (i = 0; i < ISAGPIO_NPINS; i++) { sc->sc_gpio_pins[i].pin_num = i; sc->sc_gpio_pins[i].pin_caps = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT; sc->sc_gpio_pins[i].pin_state = GPIO_PIN_LOW; } sc->sc_gpio_gc.gp_cookie = sc; sc->sc_gpio_gc.gp_pin_read = isagpio_pin_read; sc->sc_gpio_gc.gp_pin_write = isagpio_pin_write; sc->sc_gpio_gc.gp_pin_ctl = isagpio_pin_ctl; gba.gba_name = "gpio"; gba.gba_gc = &sc->sc_gpio_gc; gba.gba_pins = sc->sc_gpio_pins; gba.gba_npins = ISAGPIO_NPINS; (void)config_found(&sc->sc_dev, &gba, gpiobus_print); } int isagpio_pin_read(void *arg, int pin) { struct isagpio_softc *sc = arg; u_int8_t mask; mask = bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0); return ((mask >> pin) & 0x01); } void isagpio_pin_write(void *arg, int pin, int value) { struct isagpio_softc *sc = arg; if (value == GPIO_PIN_LOW) sc->sc_gpio_mask &= ~(0x01 << pin); else if (value == GPIO_PIN_HIGH) sc->sc_gpio_mask |= 0x01 << pin; bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, sc->sc_gpio_mask); } void isagpio_pin_ctl(void *arg, int pin, int flags) { }