sys/arch/evbarm/ixm1200/nappi_nr.c

   1 /* $NetBSD: nappi_nr.c,v 1.7 2007/10/17 19:54:13 garbled Exp $ */
   2
   3 /*
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Ichiro FUKUHARA and Naoto Shimazaki.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: nappi_nr.c,v 1.7 2007/10/17 19:54:13 garbled Exp $");
  34
  35 /*
  36  * LED support for NAPPI.
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/types.h>
  41 #include <sys/callout.h>
  42 #include <sys/device.h>
  43 #include <sys/kernel.h>
  44 #include <sys/systm.h>
  45
  46 #include <machine/bus.h>
  47
  48 #include <arm/ixp12x0/ixpsipvar.h>
  49
  50 static int      nappinr_match(struct device *, struct cfdata *, void *);
  51 static void     nappinr_attach(struct device *, struct device *, void *);
  52 #if 0
  53 static int      nappinr_activate(struct device *, enum devact);
  54 #endif
  55 static void     nappinr_callout(void *);
  56
  57 struct nappinr_softc {
  58         struct device           sc_dev;
  59         bus_space_tag_t         sc_iot;
  60         bus_space_handle_t      sc_ioh;
  61         bus_addr_t              sc_baseaddr;
  62         bus_space_handle_t      sc_pos;
  63         struct callout          sc_co;
  64 };
  65
  66 CFATTACH_DECL(nappinr, sizeof(struct nappinr_softc),
  67     nappinr_match, nappinr_attach, NULL, NULL);
  68
  69 static int
  70 nappinr_match(struct device *parent, struct cfdata *match, void *aux)
  71 {
  72         return (1);
  73 }
  74
  75 static void
  76 nappinr_attach(struct device *parent, struct device *self, void *aux)
  77 {
  78         struct nappinr_softc*           sc = (struct nappinr_softc*) self;
  79         struct ixpsip_attach_args*      sa = aux;
  80
  81         printf("\n");
  82
  83         sc->sc_iot = sa->sa_iot;
  84         sc->sc_baseaddr = sa->sa_addr;
  85
  86         if(bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0,
  87                          &sc->sc_ioh)) {
  88                 printf("%s: unable to map registers\n", self->dv_xname);
  89                 return;
  90         }
  91
  92         callout_init(&sc->sc_co, 0);
  93         callout_reset(&sc->sc_co, hz / 10, nappinr_callout, sc);
  94 }
  95
  96 #if 0
  97 static int
  98 nappinr_activate(struct device *self, enum devact act)
  99 {
 100         printf("nappinr_activate act=%d\n", act);
 101         return 0;
 102 }
 103 #endif
 104
 105 static void
 106 nappinr_callout(void *arg)
 107 {
 108         static const int        ptn[] = { 1, 2, 4, 8, 4, 2 };
 109         struct nappinr_softc*   sc = arg;
 110
 111         bus_space_write_4(sc->sc_iot, sc->sc_ioh, 0,
 112                           ptn[sc->sc_pos++ % 6] | ptn[sc->sc_pos++ % 6]<< 4);
 113         callout_reset(&sc->sc_co, hz / 10, nappinr_callout, sc);
 114 }