0fce92f5c4
and amd64. The optimization is a trivial on recent machines. Reviewed by: -arch (imp, marcel, dfr)
184 lines
3.2 KiB
C
184 lines
3.2 KiB
C
/*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#include <sys/bio.h>
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#include <sys/cdio.h>
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#include <sys/bus.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <isa/isavar.h>
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#include <dev/scd/scdreg.h>
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#include <dev/scd/scdvar.h>
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static int scd_isa_probe (device_t);
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static int scd_isa_attach (device_t);
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static int scd_isa_detach (device_t);
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static int scd_alloc_resources (device_t);
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static void scd_release_resources (device_t);
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static int
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scd_isa_probe (device_t dev)
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{
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struct scd_softc * sc;
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int error;
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/* No pnp support */
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if (isa_get_vendorid(dev))
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return (ENXIO);
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/* IO port must be configured. */
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if (bus_get_resource_start(dev, SYS_RES_IOPORT, 0) == 0)
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return (ENXIO);
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sc = device_get_softc(dev);
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sc->dev = dev;
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sc->port_rid = 0;
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sc->port_type = SYS_RES_IOPORT;
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error = scd_alloc_resources(dev);
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if (error)
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goto fail;
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error = scd_probe(sc);
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if (error) {
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device_printf(dev, "Probe failed.\n");
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goto fail;
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}
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device_set_desc(dev, sc->data.name);
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fail:
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scd_release_resources(dev);
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return (error);
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}
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static int
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scd_isa_attach (device_t dev)
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{
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struct scd_softc * sc;
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int error;
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sc = device_get_softc(dev);
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error = 0;
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sc->dev = dev;
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sc->port_rid = 0;
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sc->port_type = SYS_RES_IOPORT;
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error = scd_alloc_resources(dev);
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if (error)
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goto fail;
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error = scd_probe(sc);
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if (error) {
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device_printf(dev, "Re-Probe failed.\n");
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goto fail;
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}
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error = scd_attach(sc);
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if (error) {
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device_printf(dev, "Attach failed.\n");
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goto fail;
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}
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return (0);
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fail:
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scd_release_resources(dev);
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return (error);
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}
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static int
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scd_isa_detach (device_t dev)
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{
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struct scd_softc * sc;
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int error;
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sc = device_get_softc(dev);
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error = 0;
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destroy_dev(sc->scd_dev_t);
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scd_release_resources(dev);
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return (error);
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}
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static int
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scd_alloc_resources (device_t dev)
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{
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struct scd_softc * sc;
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int error;
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sc = device_get_softc(dev);
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error = 0;
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if (sc->port_type) {
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sc->port = bus_alloc_resource_any(dev, sc->port_type,
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&sc->port_rid, RF_ACTIVE);
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if (sc->port == NULL) {
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device_printf(dev, "Unable to allocate PORT resource.\n");
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error = ENOMEM;
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goto bad;
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}
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sc->port_bst = rman_get_bustag(sc->port);
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sc->port_bsh = rman_get_bushandle(sc->port);
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}
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mtx_init(&sc->mtx, device_get_nameunit(dev),
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"Interrupt lock", MTX_DEF | MTX_RECURSE);
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bad:
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return (error);
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}
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void
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scd_release_resources (device_t dev)
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{
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struct scd_softc * sc;
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sc = device_get_softc(dev);
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if (sc->port) {
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bus_release_resource(dev, sc->port_type, sc->port_rid, sc->port);
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sc->port_bst = 0;
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sc->port_bsh = 0;
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}
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if (mtx_initialized(&sc->mtx) != 0)
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mtx_destroy(&sc->mtx);
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return;
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}
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static device_method_t scd_isa_methods[] = {
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DEVMETHOD(device_probe, scd_isa_probe),
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DEVMETHOD(device_attach, scd_isa_attach),
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DEVMETHOD(device_detach, scd_isa_detach),
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{ 0, 0 }
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};
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static driver_t scd_isa_driver = {
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"scd",
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scd_isa_methods,
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sizeof(struct scd_softc)
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};
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static devclass_t scd_devclass;
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DRIVER_MODULE(scd, isa, scd_isa_driver, scd_devclass, NULL, 0);
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