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      1 /* $NetBSD: ichlpcib_hpet.c,v 1.3 2011/07/01 18:22:08 dyoung Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2004 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Minoura Makoto and Matthew R. Green.
      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 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: ichlpcib_hpet.c,v 1.3 2011/07/01 18:22:08 dyoung Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/bus.h>
     36 #include <sys/device.h>
     37 #include <sys/time.h>
     38 #include <sys/timetc.h>
     39 
     40 #include <dev/ic/hpetreg.h>
     41 #include <dev/ic/hpetvar.h>
     42 #include <dev/ic/i82801lpcreg.h>
     43 #include <dev/ic/i82801lpcvar.h>
     44 
     45 static int	lpcib_hpet_match(device_t , cfdata_t , void *);
     46 static void	lpcib_hpet_attach(device_t, device_t, void *);
     47 static int	lpcib_hpet_detach(device_t, int);
     48 
     49 CFATTACH_DECL_NEW(ichlpcib_hpet, sizeof(struct hpet_softc),
     50     lpcib_hpet_match, lpcib_hpet_attach, lpcib_hpet_detach, NULL);
     51 
     52 static int
     53 lpcib_hpet_match(device_t parent, cfdata_t match, void *aux)
     54 {
     55 	struct lpcib_hpet_attach_args *arg = aux;
     56 	bus_space_handle_t bh;
     57 	bus_space_tag_t bt;
     58 
     59 	bt = arg->hpet_mem_t;
     60 
     61 	if (bus_space_map(bt, arg->hpet_reg, HPET_WINDOW_SIZE, 0, &bh) != 0)
     62 		return 0;
     63 
     64 	bus_space_unmap(bt, bh, HPET_WINDOW_SIZE);
     65 
     66 	return 1;
     67 }
     68 
     69 
     70 static void
     71 lpcib_hpet_attach(device_t parent, device_t self, void *aux)
     72 {
     73 	struct hpet_softc *sc = device_private(self);
     74 	struct lpcib_hpet_attach_args *arg = aux;
     75 
     76 	sc->sc_mapped = false;
     77 	sc->sc_memt = arg->hpet_mem_t;
     78 	sc->sc_mems = HPET_WINDOW_SIZE;
     79 
     80 	if (bus_space_map(sc->sc_memt, arg->hpet_reg,
     81 		sc->sc_mems, 0, &sc->sc_memh) != 0) {
     82 		aprint_error(": failed to map mem space\n");
     83 		return;
     84 	}
     85 
     86 	aprint_naive("\n");
     87 	aprint_normal(": high precision event timer (mem 0x%08x-0x%08x)\n",
     88 	    arg->hpet_reg, arg->hpet_reg + HPET_WINDOW_SIZE);
     89 
     90 	sc->sc_mapped = true;
     91 	hpet_attach_subr(self);
     92 }
     93 
     94 static int
     95 lpcib_hpet_detach(device_t self, int flags)
     96 {
     97 	struct hpet_softc *sc = device_private(self);
     98 	int rv;
     99 
    100 	if (sc->sc_mapped != true)
    101 		return 0;
    102 
    103 	rv = hpet_detach(self, flags);
    104 
    105 	if (rv != 0)
    106 		return rv;
    107 
    108 	bus_space_unmap(sc->sc_memt, sc->sc_memh, sc->sc_mems);
    109 
    110 	return 0;
    111 }
    112