sys/dev/pci/hdaudio/hdaudio_pci.c

   1 /* $NetBSD: hdaudio_pci.c,v 1.3 2009/12/04 11:13:05 njoly Exp $ */
   2
   3 /*
   4  * Copyright (c) 2009 Precedence Technologies Ltd <support@precedence.co.uk>
   5  * Copyright (c) 2009 Jared D. McNeill <jmcneill@invisible.ca>
   6  * All rights reserved.
   7  *
   8  * This code is derived from software contributed to The NetBSD Foundation
   9  * by Precedence Technologies Ltd
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Intel High Definition Audio (Revision 1.0) device driver.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: hdaudio_pci.c,v 1.3 2009/12/04 11:13:05 njoly Exp $");
  38
  39 #include <sys/types.h>
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/device.h>
  43 #include <sys/conf.h>
  44 #include <sys/bus.h>
  45 #include <sys/intr.h>
  46
  47 #include <dev/pci/pcidevs.h>
  48 #include <dev/pci/pcivar.h>
  49
  50 #include <dev/pci/hdaudio/hdaudioreg.h>
  51 #include <dev/pci/hdaudio/hdaudiovar.h>
  52
  53 struct hdaudio_pci_softc {
  54         struct hdaudio_softc    sc_hdaudio;     /* must be first */
  55         pcitag_t                sc_tag;
  56         pci_chipset_tag_t       sc_pc;
  57         void                    *sc_ih;
  58 };
  59
  60 static int              hdaudio_pci_match(device_t, cfdata_t, void *);
  61 static void             hdaudio_pci_attach(device_t, device_t, void *);
  62 static int              hdaudio_pci_detach(device_t, int);
  63 static void             hdaudio_pci_childdet(device_t, device_t);
  64
  65 static int              hdaudio_pci_intr(void *);
  66
  67 /* power management */
  68 static bool             hdaudio_pci_resume(device_t, pmf_qual_t);
  69
  70 CFATTACH_DECL2_NEW(
  71     hdaudio_pci,
  72     sizeof(struct hdaudio_pci_softc),
  73     hdaudio_pci_match,
  74     hdaudio_pci_attach,
  75     hdaudio_pci_detach,
  76     NULL,
  77     NULL,
  78     hdaudio_pci_childdet
  79 );
  80
  81 /*
  82  * NetBSD autoconfiguration
  83  */
  84
  85 static int
  86 hdaudio_pci_match(device_t parent, cfdata_t match, void *opaque)
  87 {
  88         struct pci_attach_args *pa = opaque;
  89
  90         if (PCI_CLASS(pa->pa_class) != PCI_CLASS_MULTIMEDIA)
  91                 return 0;
  92         if (PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_MULTIMEDIA_HDAUDIO)
  93                 return 0;
  94
  95         return 10;
  96 }
  97
  98 static void
  99 hdaudio_pci_attach(device_t parent, device_t self, void *opaque)
 100 {
 101         struct hdaudio_pci_softc *sc = device_private(self);
 102         struct pci_attach_args *pa = opaque;
 103         pci_intr_handle_t ih;
 104         const char *intrstr;
 105         pcireg_t csr;
 106         int err;
 107
 108         aprint_naive("\n");
 109         aprint_normal(": HD Audio Controller\n");
 110
 111         sc->sc_pc = pa->pa_pc;
 112         sc->sc_tag = pa->pa_tag;
 113
 114         sc->sc_hdaudio.sc_subsystem = pci_conf_read(sc->sc_pc, sc->sc_tag,
 115             PCI_SUBSYS_ID_REG);
 116
 117         /* Enable busmastering and MMIO access */
 118         csr = pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG);
 119         csr |= PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_BACKTOBACK_ENABLE;
 120         pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG, csr);
 121
 122         /* Map MMIO registers */
 123         err = pci_mapreg_map(pa, HDAUDIO_PCI_AZBARL, PCI_MAPREG_TYPE_MEM, 0,
 124                              &sc->sc_hdaudio.sc_memt,
 125                              &sc->sc_hdaudio.sc_memh,
 126                              &sc->sc_hdaudio.sc_membase,
 127                              &sc->sc_hdaudio.sc_memsize);
 128         if (err) {
 129                 aprint_error_dev(self, "couldn't map mmio space\n");
 130                 return;
 131         }
 132         sc->sc_hdaudio.sc_memvalid = true;
 133         sc->sc_hdaudio.sc_dmat = pa->pa_dmat;
 134
 135         /* Map interrupt and establish handler */
 136         err = pci_intr_map(pa, &ih);
 137         if (err) {
 138                 aprint_error_dev(self, "couldn't map interrupt\n");
 139                 return;
 140         }
 141         intrstr = pci_intr_string(pa->pa_pc, ih);
 142         sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_AUDIO,
 143             hdaudio_pci_intr, sc);
 144         if (sc->sc_ih == NULL) {
 145                 aprint_error_dev(self, "couldn't establish interrupt");
 146                 if (intrstr)
 147                         aprint_error(" at %s", intrstr);
 148                 aprint_error("\n");
 149                 return;
 150         }
 151         aprint_normal_dev(self, "interrupting at %s\n", intrstr);
 152
 153         if (!pmf_device_register(self, NULL, hdaudio_pci_resume))
 154                 aprint_error_dev(self, "couldn't establish power handler\n");
 155
 156         /* Attach bus-independent HD audio layer */
 157         hdaudio_attach(self, &sc->sc_hdaudio);
 158 }
 159
 160 void
 161 hdaudio_pci_childdet(device_t self, device_t child)
 162 {
 163 #if notyet
 164         struct hdaudio_pci_softc *sc = device_private(self);
 165
 166         hdaudio_childdet(&sc->sc_hdaudio, child);
 167 #endif
 168 }
 169
 170 static int
 171 hdaudio_pci_detach(device_t self, int flags)
 172 {
 173         struct hdaudio_pci_softc *sc = device_private(self);
 174         pcireg_t csr;
 175
 176         hdaudio_detach(&sc->sc_hdaudio, flags);
 177
 178         if (sc->sc_ih != NULL) {
 179                 pci_intr_disestablish(sc->sc_pc, sc->sc_ih);
 180                 sc->sc_ih = NULL;
 181         }
 182         if (sc->sc_hdaudio.sc_memvalid == true) {
 183                 bus_space_unmap(sc->sc_hdaudio.sc_memt,
 184                                 sc->sc_hdaudio.sc_memh,
 185                                 sc->sc_hdaudio.sc_memsize);
 186                 sc->sc_hdaudio.sc_memvalid = false;
 187         }
 188
 189         /* Disable busmastering and MMIO access */
 190         csr = pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG);
 191         csr &= ~(PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_BACKTOBACK_ENABLE);
 192         pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_COMMAND_STATUS_REG, csr);
 193
 194         pmf_device_deregister(self);
 195
 196         return 0;
 197 }
 198
 199 static int
 200 hdaudio_pci_intr(void *opaque)
 201 {
 202         struct hdaudio_pci_softc *sc = opaque;
 203
 204         return hdaudio_intr(&sc->sc_hdaudio);
 205 }
 206
 207 static bool
 208 hdaudio_pci_resume(device_t self, pmf_qual_t qual)
 209 {
 210         struct hdaudio_pci_softc *sc = device_private(self);
 211
 212         return hdaudio_resume(&sc->sc_hdaudio);
 213 }