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142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
/* $NetBSD: amdpcib_hpet.c,v 1.8 2011/07/01 18:22:08 dyoung Exp $ */
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/*
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* Copyright (c) 2006 Nicolas Joly
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: amdpcib_hpet.c,v 1.8 2011/07/01 18:22:08 dyoung Exp $");
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/time.h>
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#include <sys/timetc.h>
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#include <sys/bus.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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#include <dev/ic/hpetreg.h>
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#include <dev/ic/hpetvar.h>
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static int amdpcib_hpet_match(device_t , cfdata_t , void *);
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static void amdpcib_hpet_attach(device_t, device_t, void *);
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static int amdpcib_hpet_detach(device_t, int);
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static pcireg_t amdpcib_hpet_addr(struct pci_attach_args *);
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CFATTACH_DECL_NEW(amdpcib_hpet, sizeof(struct hpet_softc),
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amdpcib_hpet_match, amdpcib_hpet_attach, amdpcib_hpet_detach, NULL);
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static int
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amdpcib_hpet_match(device_t parent, cfdata_t match, void *aux)
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{
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struct pci_attach_args *pa = aux;
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bus_space_handle_t bh;
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bus_space_tag_t bt;
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pcireg_t addr;
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addr = amdpcib_hpet_addr(pa);
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if (addr == 0)
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return 0;
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bt = pa->pa_memt;
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if (bus_space_map(bt, addr, HPET_WINDOW_SIZE, 0, &bh) != 0)
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return 0;
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bus_space_unmap(bt, bh, HPET_WINDOW_SIZE);
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return 1;
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}
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static void
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amdpcib_hpet_attach(device_t parent, device_t self, void *aux)
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{
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struct hpet_softc *sc = device_private(self);
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struct pci_attach_args *pa = aux;
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pcireg_t addr;
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sc->sc_mapped = false;
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addr = amdpcib_hpet_addr(pa);
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if (addr == 0) {
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aprint_error(": failed to get address\n");
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return;
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}
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sc->sc_memt = pa->pa_memt;
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sc->sc_mems = HPET_WINDOW_SIZE;
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if (bus_space_map(sc->sc_memt, addr, sc->sc_mems, 0, &sc->sc_memh)) {
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aprint_error(": failed to map mem space\n");
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return;
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}
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aprint_naive("\n");
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aprint_normal(": high precision event timer (mem 0x%08x-0x%08x)\n",
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addr, addr + HPET_WINDOW_SIZE);
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sc->sc_mapped = true;
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hpet_attach_subr(self);
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}
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static int
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amdpcib_hpet_detach(device_t self, int flags)
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{
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struct hpet_softc *sc = device_private(self);
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int rv;
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if (sc->sc_mapped != true)
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return 0;
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rv = hpet_detach(self, flags);
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if (rv != 0)
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return rv;
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bus_space_unmap(sc->sc_memt, sc->sc_memh, sc->sc_mems);
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return 0;
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}
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static pcireg_t
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amdpcib_hpet_addr(struct pci_attach_args *pa)
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{
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pcireg_t conf;
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conf = pci_conf_read(pa->pa_pc, pa->pa_tag, 0xa0);
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if ((conf & 1) == 0)
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return 0;
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return conf & 0xfffffc00;
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}
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