1 /* $NetBSD: amdpcib_hpet.c,v 1.1 2007/10/26 22:17:14 xtraeme Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Nicolas Joly 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 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: amdpcib_hpet.c,v 1.1 2007/10/26 22:17:14 xtraeme Exp $"); 33 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 37 #include <sys/time.h> 38 #include <sys/timetc.h> 39 40 #include <machine/bus.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcidevs.h> 45 46 #include <dev/ic/hpetvar.h> 47 48 49 static int amdpcib_hpet_match(struct device *, struct cfdata *, void *); 50 static void amdpcib_hpet_attach(struct device *, struct device *, void *); 51 52 CFATTACH_DECL(amdpcib_hpet, sizeof(struct hpet_softc), amdpcib_hpet_match, 53 amdpcib_hpet_attach, NULL, NULL); 54 55 static int 56 amdpcib_hpet_match(struct device *parent, struct cfdata *match, void *aux) 57 { 58 return 1; 59 } 60 61 static void 62 amdpcib_hpet_attach(struct device *parent, struct device *self, void *aux) 63 { 64 struct hpet_softc *sc; 65 struct pci_attach_args *pa; 66 pcireg_t conf, addr; 67 68 sc = (struct hpet_softc *)self; 69 pa = (struct pci_attach_args *)aux; 70 71 aprint_naive("\n"); 72 aprint_normal(": HPET timer\n"); 73 74 conf = pci_conf_read(pa->pa_pc, pa->pa_tag, 0xa0); 75 if ((conf & 1) == 0) { 76 printf("%s: HPET timer is disabled\n", sc->sc_dev.dv_xname); 77 return; 78 } 79 80 sc->sc_memt = pa->pa_memt; 81 82 addr = conf & 0xfffffc00; 83 if (bus_space_map(sc->sc_memt, addr, 1024, 0, 84 &sc->sc_memh)) { 85 printf("%s: failed to map mem\n", sc->sc_dev.dv_xname); 86 return; 87 } 88 89 #ifdef __HAVE_TIMECOUNTER 90 hpet_attach_subr(sc); 91 #endif 92 } 93