sys/dev/mcd/mcd_isa.c

   1 /*
   2  */
   3
   4 #include <sys/cdefs.h>
   5 __FBSDID("$FreeBSD$");
   6
   7 #include <sys/param.h>
   8 #include <sys/systm.h>
   9 #include <sys/kernel.h>
  10 #include <sys/module.h>
  11 #include <sys/conf.h>
  12 #include <sys/fcntl.h>
  13 #include <sys/bio.h>
  14 #include <sys/cdio.h>
  15 #include <sys/bus.h>
  16
  17 #include <sys/lock.h>
  18 #include <sys/mutex.h>
  19
  20 #include <machine/bus.h>
  21 #include <machine/resource.h>
  22 #include <sys/rman.h>
  23
  24 #include <isa/isavar.h>
  25
  26 #include <dev/mcd/mcdreg.h>
  27 #include <dev/mcd/mcdvar.h>
  28
  29 static int      mcd_isa_probe   (device_t);
  30 static int      mcd_isa_attach  (device_t);
  31 static int      mcd_isa_detach  (device_t);
  32
  33 static int      mcd_alloc_resources     (device_t);
  34 static void     mcd_release_resources   (device_t);
  35
  36 static int
  37 mcd_isa_probe (device_t dev)
  38 {
  39         struct mcd_softc *      sc;
  40         int                     error;
  41
  42         /* No pnp support */
  43         if (isa_get_vendorid(dev))
  44                 return (ENXIO);
  45
  46         /* IO port must be configured. */
  47         if (bus_get_resource_start(dev, SYS_RES_IOPORT, 0) == 0)
  48                 return (ENXIO);
  49
  50         sc = device_get_softc(dev);
  51         sc->dev = dev;
  52         sc->port_rid = 0;
  53         sc->port_type = SYS_RES_IOPORT;
  54         error = mcd_alloc_resources(dev);
  55         if (error)
  56                 goto fail;
  57
  58         error = mcd_probe(sc);
  59         if (error) {
  60                 device_printf(dev, "Probe failed.\n");
  61                 goto fail;
  62         }
  63
  64         device_set_desc(dev, sc->data.name);
  65
  66 fail:
  67         mcd_release_resources(dev);
  68         return (error);
  69 }
  70
  71 static int
  72 mcd_isa_attach (device_t dev)
  73 {
  74         struct mcd_softc *      sc;
  75         int                     error;
  76
  77         sc = device_get_softc(dev);
  78         error = 0;
  79
  80         sc->dev = dev;
  81         sc->port_rid = 0;
  82         sc->port_type = SYS_RES_IOPORT;
  83         error = mcd_alloc_resources(dev);
  84         if (error)
  85                 goto fail;
  86
  87         error = mcd_probe(sc);
  88         if (error) {
  89                 device_printf(dev, "Re-Probe failed.\n");
  90                 goto fail;
  91         }
  92
  93         error = mcd_attach(sc);
  94         if (error) {
  95                 device_printf(dev, "Attach failed.\n");
  96                 goto fail;
  97         }
  98
  99         return (0);
 100 fail:
 101         mcd_release_resources(dev);
 102         return (error);
 103 }
 104
 105 static int
 106 mcd_isa_detach (device_t dev)
 107 {
 108         struct mcd_softc *      sc;
 109         int                     error;
 110
 111         sc = device_get_softc(dev);
 112         error = 0;
 113
 114         destroy_dev(sc->mcd_dev_t);
 115
 116         mcd_release_resources(dev);
 117
 118         return (error);
 119 }
 120
 121 static int
 122 mcd_alloc_resources (device_t dev)
 123 {
 124         struct mcd_softc *      sc;
 125         int                     error;
 126
 127         sc = device_get_softc(dev);
 128         error = 0;
 129         mtx_init(&sc->mtx, "mcd", NULL, MTX_DEF);
 130
 131         if (sc->port_type) {
 132                 sc->port = bus_alloc_resource_any(dev, sc->port_type,
 133                                 &sc->port_rid, RF_ACTIVE);
 134                 if (sc->port == NULL) {
 135                         device_printf(dev, "Unable to allocate PORT resource.\n");
 136                         error = ENOMEM;
 137                         goto bad;
 138                 }
 139         }
 140
 141         if (sc->irq_type) {
 142                 sc->irq = bus_alloc_resource_any(dev, sc->irq_type,
 143                                 &sc->irq_rid, RF_ACTIVE);
 144                 if (sc->irq == NULL) {
 145                         device_printf(dev, "Unable to allocate IRQ resource.\n");
 146                         error = ENOMEM;
 147                         goto bad;
 148                 }
 149         }
 150
 151         if (sc->drq_type) {
 152                 sc->drq = bus_alloc_resource_any(dev, sc->drq_type,
 153                                 &sc->drq_rid, RF_ACTIVE);
 154                 if (sc->drq == NULL) {
 155                         device_printf(dev, "Unable to allocate DRQ resource.\n");
 156                         error = ENOMEM;
 157                         goto bad;
 158                 }
 159         }
 160
 161 bad:
 162         return (error);
 163 }
 164
 165 static void
 166 mcd_release_resources (device_t dev)
 167 {
 168         struct mcd_softc *      sc;
 169
 170         sc = device_get_softc(dev);
 171
 172         if (sc->irq_ih)
 173                 bus_teardown_intr(dev, sc->irq, sc->irq_ih);
 174         if (sc->port)
 175                 bus_release_resource(dev, sc->port_type, sc->port_rid, sc->port);
 176         if (sc->irq)
 177                 bus_release_resource(dev, sc->irq_type, sc->irq_rid, sc->irq);
 178         if (sc->drq)
 179                 bus_release_resource(dev, sc->drq_type, sc->drq_rid, sc->drq);
 180
 181         mtx_destroy(&sc->mtx);
 182
 183         return;
 184 }
 185
 186 static device_method_t mcd_isa_methods[] = {
 187         DEVMETHOD(device_probe,         mcd_isa_probe),
 188         DEVMETHOD(device_attach,        mcd_isa_attach),
 189         DEVMETHOD(device_detach,        mcd_isa_detach),
 190
 191         { 0, 0 }
 192 };
 193
 194 static driver_t mcd_isa_driver = {
 195         "mcd",
 196         mcd_isa_methods,
 197         sizeof(struct mcd_softc)
 198 };
 199
 200 static devclass_t       mcd_devclass;
 201
 202 DRIVER_MODULE(mcd, isa, mcd_isa_driver, mcd_devclass, NULL, 0);