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      1 /*	$NetBSD: epled.c,v 1.5 2021/11/21 08:25:26 skrll 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 1.5 2021/11/21 08:25:26 skrll 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 	int			sc_port;
     41 	int			sc_green;
     42 	int			sc_red;
     43 	struct epgpio_softc	*sc_gpio;
     44 };
     45 
     46 static int epled_match(device_t, cfdata_t, void *);
     47 static void epled_attach(device_t, device_t, void *);
     48 
     49 CFATTACH_DECL_NEW(epled, sizeof(struct epled_softc),
     50 	      epled_match, epled_attach, NULL, NULL);
     51 
     52 static struct epled_softc *the_epled_sc = 0;
     53 
     54 int
     55 epled_match(device_t parent, cfdata_t cf, void *aux)
     56 {
     57 	return 1;
     58 }
     59 
     60 void
     61 epled_attach(device_t parent, device_t self, void *aux)
     62 {
     63 	struct epled_softc *sc = device_private(self);
     64 	struct epgpio_attach_args *ga = aux;
     65 
     66 	sc->sc_port = ga->ga_port;
     67 	sc->sc_green = ga->ga_bit1;
     68 	sc->sc_red = ga->ga_bit2;
     69 	sc->sc_gpio = (struct epgpio_softc *)parent;
     70 	printf("\n");
     71 
     72 	if (!the_epled_sc)
     73 		the_epled_sc = sc;
     74 #ifdef DIAGNOSTIC
     75 	else
     76 		printf("%s is already configured\n", device_xname(self));
     77 #endif
     78 
     79 	epgpio_out(sc->sc_gpio, sc->sc_port, sc->sc_green);
     80 	epgpio_out(sc->sc_gpio, sc->sc_port, sc->sc_red);
     81 }
     82 
     83 int
     84 epled_red_on(void)
     85 {
     86 	struct epled_softc *sc = the_epled_sc;
     87 
     88 #ifdef DIAGNOSTIC
     89 	if (!sc) {
     90 		printf("epled not configured\n");
     91 		return (ENXIO);
     92 	}
     93 #endif
     94 	epgpio_set(sc->sc_gpio, sc->sc_port, sc->sc_red);
     95 	return 0;
     96 }
     97 
     98 int
     99 epled_red_off(void)
    100 {
    101 	struct epled_softc *sc = the_epled_sc;
    102 
    103 #ifdef DIAGNOSTIC
    104 	if (!sc) {
    105 		printf("epled not configured\n");
    106 		return (ENXIO);
    107 	}
    108 #endif
    109 	epgpio_clear(sc->sc_gpio, sc->sc_port, sc->sc_red);
    110 	return 0;
    111 }
    112 
    113 int
    114 epled_green_on(void)
    115 {
    116 	struct epled_softc *sc = the_epled_sc;
    117 
    118 #ifdef DIAGNOSTIC
    119 	if (!sc) {
    120 		printf("epled not configured\n");
    121 		return (ENXIO);
    122 	}
    123 #endif
    124 	epgpio_set(sc->sc_gpio, sc->sc_port, sc->sc_green);
    125 	return 0;
    126 }
    127 
    128 int
    129 epled_green_off(void)
    130 {
    131 	struct epled_softc *sc = the_epled_sc;
    132 
    133 #ifdef DIAGNOSTIC
    134 	if (!sc) {
    135 		printf("epled not configured\n");
    136 		return (ENXIO);
    137 	}
    138 #endif
    139 	epgpio_clear(sc->sc_gpio, sc->sc_port, sc->sc_green);
    140 	return 0;
    141 }
    142