ISA PnP supporting code from NetBSD, and a pccom driver that supports ISA PnP.

1 files changed, 169 insertions, 0 deletions

diff --git a/sys/arch/i386/isa/isapnp_machdep.c b/sys/arch/i386/isa/isapnp_machdep.c
new file mode 100644
index 00000000000..ac41c667b9c
--- /dev/null
+++ b/sys/arch/i386/isa/isapnp_machdep.c
@@ -0,0 +1,169 @@
+/*	$OpenBSD: isapnp_machdep.c,v 1.1 1997/12/21 14:44:33 downsj Exp $	*/
+/*	$NetBSD: isapnp_machdep.c,v 1.5 1997/10/04 17:32:30 thorpej Exp $	*/
+
+/*-
+ * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
+ * NASA Ames Research Center.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the NetBSD
+ *	Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 1996 Christos Zoulas.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Christos Zoulas.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Machine-dependent portions of ISA PnP bus autoconfiguration.
+ *
+ * N.B. This file exists mostly to get around some lameness surrounding
+ * the PnP spec.  ISA PnP registers live where some `normal' ISA
+ * devices do, but are e.g. write-only registers where the normal
+ * device has a read-only register.  This breaks in the presence of
+ * i/o port accounting.  This file takes care of mapping ISA PnP
+ * registers without actually allocating them in extent maps.
+ *
+ * Since this is a machine-dependent file, we make all sorts of
+ * assumptions about bus.h's guts.  Beware!
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+
+#include <machine/bus.h>
+
+#include <dev/isa/isavar.h>
+
+#include <dev/isa/isapnpreg.h>
+#include <dev/isa/isapnpvar.h>
+
+/* isapnp_map():
+ *	Map I/O regions used by PnP
+ */
+int
+isapnp_map(sc)
+	struct isapnp_softc *sc;
+{
+
+#ifdef DIAGNOSTIC
+	if (sc->sc_iot != I386_BUS_SPACE_IO)
+		panic("isapnp_map: bogus bus space tag");
+#endif
+
+	sc->sc_addr_ioh = ISAPNP_ADDR;
+	sc->sc_wrdata_ioh = ISAPNP_WRDATA;
+	return (0);
+}
+
+/* isapnp_unmap():
+ *	Unmap I/O regions used by PnP
+ */
+void
+isapnp_unmap(sc)
+	struct isapnp_softc *sc;
+{
+
+	/* Do nothing. */
+}
+
+/* isapnp_map_readport():
+ *	Called to map the PnP `read port', which is mapped independently
+ *	of the `write' and `addr' ports.
+ *
+ *	NOTE: assumes the caller has filled in sc->sc_read_port!
+ */
+int
+isapnp_map_readport(sc)
+	struct isapnp_softc *sc;
+{
+#ifdef _KERNEL
+	int error;
+#endif
+
+#ifdef DIAGNOSTIC
+	if (sc->sc_iot != I386_BUS_SPACE_IO)
+		panic("isapnp_map_readport: bogus bus space tag");
+#endif
+
+#ifdef _KERNEL
+	/* Check if some other device has already claimed this port. */
+	if ((error = bus_space_map(sc->sc_iot, sc->sc_read_port, 1, 0,
+	    &sc->sc_read_ioh)) != 0)
+		return error;
+
+	/*
+	 * XXX: We unmap the port because it can and will be used by other
+	 *	devices such as a joystick. We need a better port accounting
+	 *	scheme with read and write ports.
+	 */
+	bus_space_unmap(sc->sc_iot, sc->sc_read_ioh, 1);
+#endif
+	return 0;
+}
+
+/* isapnp_unmap_readport():
+ *	Pretend to unmap a previously mapped `read port'.
+ */
+void
+isapnp_unmap_readport(sc)
+	struct isapnp_softc *sc;
+{
+
+	/* Do nothing */
+}