1 /* $NetBSD: i80312_gpio.c,v 1.1 2001/11/29 08:27:11 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Intel i80312 Companion I/O general purpose I/O support. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 45 #include <machine/bus.h> 46 47 #include <arm/xscale/i80312reg.h> 48 #include <arm/xscale/i80312var.h> 49 50 /* 51 * i80312_gpio_set_direction: 52 * 53 * Set the direction of the indicated GPIO pins (1 == output). 54 */ 55 void 56 i80312_gpio_set_direction(uint8_t which, uint8_t val) 57 { 58 struct i80312_softc *sc = i80312_softc; 59 60 sc->sc_gpio_dir = (sc->sc_gpio_dir & ~which) | val; 61 bus_space_write_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GOE, 62 ~sc->sc_gpio_dir); 63 } 64 65 /* 66 * i80312_gpio_set_val: 67 * 68 * Set the value of the indicated GPIO pins. 69 */ 70 void 71 i80312_gpio_set_val(uint8_t which, uint8_t val) 72 { 73 struct i80312_softc *sc = i80312_softc; 74 75 sc->sc_gpio_val = (sc->sc_gpio_val & ~which) | val; 76 bus_space_write_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GOD, 77 ~sc->sc_gpio_val); 78 } 79 80 /* 81 * i80312_gpio_get_val: 82 * 83 * Get the current state of the GPIO pins. 84 */ 85 uint8_t 86 i80312_gpio_get_val(void) 87 { 88 struct i80312_softc *sc = i80312_softc; 89 90 return (bus_space_read_1(sc->sc_st, sc->sc_intc_sh, I80312_INTC_GID)); 91 } 92