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obsled.c revision 1.1 
      1 /*	$NetBSD: obsled.c,v 1.1 2005/01/24 18:47:37 shige Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2004 Shigeyuki Fukushima.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above
     13  *    copyright notice, this list of conditions and the following
     14  *    disclaimer in the documentation and/or other materials provided
     15  *    with the distribution.
     16  * 3. The name of the author may not be used to endorse or promote
     17  *    products derived from this software without specific prior
     18  *    written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     21  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     23  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     24  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
     26  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     28  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: obsled.c,v 1.1 2005/01/24 18:47:37 shige Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/device.h>
     38 #include <sys/queue.h>
     39 #include <sys/systm.h>
     40 
     41 #include <machine/obs405.h>
     42 
     43 #include <powerpc/ibm4xx/dev/gpiovar.h>
     44 
     45 struct obsled_softc {
     46         struct device sc_dev;
     47 	gpio_tag_t sc_tag;
     48         int sc_addr;
     49 };
     50 
     51 static void	obsled_attach(struct device *, struct device *, void *);
     52 static int	obsled_match(struct device *, struct cfdata *, void *);
     53 
     54 CFATTACH_DECL(obsled, sizeof(struct obsled_softc),
     55 	obsled_match, obsled_attach, NULL, NULL);
     56 
     57 static int
     58 obsled_match(struct device *parent, struct cfdata *cf, void *aux)
     59 {
     60         struct gpio_attach_args *ga = aux;
     61 
     62 	/* XXX: support only OpenBlockS266 LED */
     63         if (ga->ga_addr == OBS405_GPIO_LED1)
     64                 return (1);
     65         else if (ga->ga_addr == OBS405_GPIO_LED2)
     66                 return (1);
     67         else if (ga->ga_addr == OBS405_GPIO_LED4)
     68                 return (1);
     69 
     70         return (0);
     71 }
     72 
     73 static void
     74 obsled_attach(struct device *parent, struct device *self, void *aux)
     75 {
     76         struct obsled_softc *sc = (struct obsled_softc *)self;
     77         struct gpio_attach_args *ga = aux;
     78 	int led = (1 << sc->sc_dev.dv_unit);
     79 
     80         aprint_naive(": OpenBlockS LED%d\n", led);
     81         aprint_normal(": OpenBlockS LED%d\n", led);
     82 
     83         sc->sc_tag = ga->ga_tag;
     84         sc->sc_addr = ga->ga_addr;
     85 
     86 	obs405_led_set(OBS405_LED_OFF);
     87 #if 0
     88 	{
     89 		gpio_tag_t tag = sc->sc_tag;
     90 	 	(*(tag)->io_or_write)((tag)->cookie, sc->sc_addr, 0);
     91 	}
     92 #endif
     93 }
     94 
     95 void
     96 obs405_led_set(int led)
     97 {
     98 	struct device *dp = NULL;
     99 	struct devicelist *dlp = &alldevs;
    100 
    101         for (dp = TAILQ_FIRST(dlp); dp != NULL; dp = TAILQ_NEXT(dp, dv_list)) {
    102 		if (dp->dv_cfdata != NULL
    103 			&& strcmp(dp->dv_cfdata->cf_name, "obsled") == 0) {
    104 			struct obsled_softc *sc = (struct obsled_softc *)dp;
    105 			gpio_tag_t tag = sc->sc_tag;
    106 			int bit = (led & (1 << dp->dv_unit)) >> dp->dv_unit;
    107 	 		(*(tag)->io_or_write)((tag)->cookie,
    108 					sc->sc_addr, (~bit & 1));
    109 		}
    110 	}
    111 }
    112