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ixdp425_led.c revision 1.5 
      1 /*	$NetBSD: ixdp425_led.c,v 1.5 2011/07/01 20:42:36 dyoung Exp $ */
      2 /*
      3  * Copyright (c) 2003
      4  *	Ichiro FUKUHARA <ichiro (at) ichiro.org>.
      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 copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
     20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: ixdp425_led.c,v 1.5 2011/07/01 20:42:36 dyoung Exp $");
     30 
     31 /*
     32  * LED support for IXDP425
     33  */
     34 
     35 #include <sys/param.h>
     36 #include <sys/types.h>
     37 #include <sys/callout.h>
     38 #include <sys/device.h>
     39 #include <sys/kernel.h>
     40 #include <sys/systm.h>
     41 
     42 #include <sys/bus.h>
     43 
     44 #include <arm/xscale/ixp425_sipvar.h>
     45 #include <arm/xscale/ixp425var.h>
     46 
     47 static int	ixdpled_match(struct device *, struct cfdata *, void *);
     48 static void	ixdpled_attach(struct device *, struct device *, void *);
     49 static void	ixdpled_callout(void *);
     50 
     51 extern void	ixp425_expbus_init(void);
     52 
     53 struct ixdpled_softc {
     54 	struct device		sc_dev;
     55 	bus_space_tag_t		sc_iot;
     56 	bus_space_handle_t	sc_ioh;
     57 	bus_addr_t		sc_baseaddr;
     58 	bus_space_handle_t	sc_pos;
     59 	struct callout		sc_co;
     60 };
     61 
     62 CFATTACH_DECL(ixdpled, sizeof(struct ixdpled_softc),
     63     ixdpled_match, ixdpled_attach, NULL, NULL);
     64 
     65 static int
     66 ixdpled_match(struct device *parent, struct cfdata *match, void *aux)
     67 {
     68 	return (1);
     69 }
     70 
     71 static void
     72 ixdpled_attach(struct device *parent, struct device *self, void *aux)
     73 {
     74 	struct ixdpled_softc*		sc = (struct ixdpled_softc*) self;
     75 	struct ixpsip_attach_args*	sa = aux;
     76 
     77 	printf("\n");
     78 
     79   	sc->sc_iot = sa->sa_iot;
     80   	sc->sc_baseaddr = sa->sa_addr;
     81 
     82 	if(bus_space_map(sc->sc_iot, sa->sa_addr, sa->sa_size, 0,
     83 			 &sc->sc_ioh)) {
     84 		printf("%s: unable to map registers\n", self->dv_xname);
     85 		return;
     86 	}
     87 
     88 	IXPREG(IXP425_EXP_VBASE + EXP_TIMING_CS2_OFFSET) =
     89 		IXP425_EXP_ADDR_T(3) | IXP425_EXP_SETUP_T(3) |
     90 		IXP425_EXP_STROBE_T(15) | IXP425_EXP_HOLD_T(3) |
     91 		IXP425_EXP_RECOVERY_T(15) | EXP_SZ_512 | EXP_WR_EN |
     92 		IXP425_EXP_CS_EN;
     93 
     94 	callout_init(&sc->sc_co, 0);
     95         callout_reset(&sc->sc_co, hz / 5, ixdpled_callout, sc);
     96 
     97 }
     98 
     99 static void
    100 ixdpled_callout(void *arg)
    101 {
    102 	struct ixdpled_softc*	sc = arg;
    103 
    104 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, 0,
    105 			  0x1000 + (sc->sc_pos++ % 16));
    106 
    107         callout_reset(&sc->sc_co, hz / 5, ixdpled_callout, sc);
    108 }
    109 
    110