sys/arch/evbarm/ixdp425/ixdp425_led.c

   1 /*      $NetBSD: ixdp425_led.c,v 1.3 2007/10/17 19:54:13 garbled Exp $ */
   2 /*
   3  * Copyright (c) 2003
   4  *      Ichiro FUKUHARA <ichiro@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 1.3 2007/10/17 19:54:13 garbled 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 <machine/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