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epled.c revision 1.3 
      1 /*	$NetBSD: epled.c,v 1.3 2011/07/01 19:31:17 dyoung Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2005 HAMAJIMA Katsuomi. All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: epled.c,v 1.3 2011/07/01 19:31:17 dyoung Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/systm.h>
     33 #include <sys/kernel.h>
     34 #include <sys/device.h>
     35 #include <sys/bus.h>
     36 #include <arm/ep93xx/epgpiovar.h>
     37 #include <arm/ep93xx/epledvar.h>
     38 
     39 struct epled_softc {
     40 	struct device		sc_dev;
     41 	int			sc_port;
     42 	int			sc_green;
     43 	int			sc_red;
     44 	struct epgpio_softc	*sc_gpio;
     45 };
     46 
     47 static int epled_match(struct device *, struct cfdata *, void *);
     48 static void epled_attach(struct device *, struct device *, void *);
     49 
     50 CFATTACH_DECL(epled, sizeof(struct epled_softc),
     51 	      epled_match, epled_attach, NULL, NULL);
     52 
     53 static struct epled_softc *the_epled_sc = 0;
     54 
     55 int
     56 epled_match(struct device *parent, struct cfdata *cf, void *aux)
     57 {
     58 	return 1;
     59 }
     60 
     61 void
     62 epled_attach(struct device *parent, struct device *self, void *aux)
     63 {
     64 	struct epled_softc *sc = (struct epled_softc *)self;
     65 	struct epgpio_attach_args *ga = aux;
     66 
     67 	sc->sc_port = ga->ga_port;
     68 	sc->sc_green = ga->ga_bit1;
     69 	sc->sc_red = ga->ga_bit2;
     70 	sc->sc_gpio = (struct epgpio_softc *)parent;
     71 	printf("\n");
     72 
     73 	if (!the_epled_sc)
     74 		the_epled_sc = sc;
     75 #ifdef DIAGNOSTIC
     76 	else
     77 		printf("%s is already configured\n", sc->sc_dev.dv_xname);
     78 #endif
     79 
     80 	epgpio_out(sc->sc_gpio, sc->sc_port, sc->sc_green);
     81 	epgpio_out(sc->sc_gpio, sc->sc_port, sc->sc_red);
     82 }
     83 
     84 int
     85 epled_red_on(void)
     86 {
     87 	struct epled_softc *sc = the_epled_sc;
     88 
     89 #ifdef DIAGNOSTIC
     90 	if (!sc) {
     91 		printf("epled not configured\n");
     92 		return (ENXIO);
     93 	}
     94 #endif
     95 	epgpio_set(sc->sc_gpio, sc->sc_port, sc->sc_red);
     96 	return 0;
     97 }
     98 
     99 int
    100 epled_red_off(void)
    101 {
    102 	struct epled_softc *sc = the_epled_sc;
    103 
    104 #ifdef DIAGNOSTIC
    105 	if (!sc) {
    106 		printf("epled not configured\n");
    107 		return (ENXIO);
    108 	}
    109 #endif
    110 	epgpio_clear(sc->sc_gpio, sc->sc_port, sc->sc_red);
    111 	return 0;
    112 }
    113 
    114 int
    115 epled_green_on(void)
    116 {
    117 	struct epled_softc *sc = the_epled_sc;
    118 
    119 #ifdef DIAGNOSTIC
    120 	if (!sc) {
    121 		printf("epled not configured\n");
    122 		return (ENXIO);
    123 	}
    124 #endif
    125 	epgpio_set(sc->sc_gpio, sc->sc_port, sc->sc_green);
    126 	return 0;
    127 }
    128 
    129 int
    130 epled_green_off(void)
    131 {
    132 	struct epled_softc *sc = the_epled_sc;
    133 
    134 #ifdef DIAGNOSTIC
    135 	if (!sc) {
    136 		printf("epled not configured\n");
    137 		return (ENXIO);
    138 	}
    139 #endif
    140 	epgpio_clear(sc->sc_gpio, sc->sc_port, sc->sc_green);
    141 	return 0;
    142 }
    143