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-rw-r--r--sys/dev/pci/isa_pci.c239
1 files changed, 239 insertions, 0 deletions
diff --git a/sys/dev/pci/isa_pci.c b/sys/dev/pci/isa_pci.c
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index 0000000..5690df1
--- /dev/null
+++ b/sys/dev/pci/isa_pci.c
@@ -0,0 +1,239 @@
+/*-
+ * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
+ * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
+ * Copyright (c) 2000 BSDi
+ * 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. 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 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * PCI:ISA bridge support
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <pci/pcivar.h>
+#include <pci/pcireg.h>
+
+#define ELCR_IOADDR 0x4d0 /* Interrupt Edge/Level Control Registers */
+#define ELCR_IOLEN 2
+
+struct isab_softc {
+ struct resource *elcr_res;
+ u_char saved_elcr[ELCR_IOLEN];
+};
+
+static int isab_probe(device_t dev);
+static int isab_attach(device_t dev);
+static int isab_detach(device_t dev);
+static int isab_resume(device_t dev);
+static int isab_suspend(device_t dev);
+
+static device_method_t isab_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, isab_probe),
+ DEVMETHOD(device_attach, isab_attach),
+ DEVMETHOD(device_detach, isab_detach),
+ DEVMETHOD(device_shutdown, bus_generic_shutdown),
+ DEVMETHOD(device_suspend, isab_suspend),
+ DEVMETHOD(device_resume, isab_resume),
+
+ /* Bus interface */
+ DEVMETHOD(bus_print_child, bus_generic_print_child),
+ DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
+ DEVMETHOD(bus_release_resource, bus_generic_release_resource),
+ DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+ DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+ DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
+ DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
+
+ { 0, 0 }
+};
+
+static driver_t isab_driver = {
+ "isab",
+ isab_methods,
+ sizeof(struct isab_softc),
+};
+
+static devclass_t isab_devclass;
+
+DRIVER_MODULE(isab, pci, isab_driver, isab_devclass, 0, 0);
+
+/*
+ * XXX we need to add a quirk list here for bridges that don't correctly
+ * report themselves.
+ */
+static int
+isab_probe(device_t dev)
+{
+ int matched = 0;
+
+ /*
+ * Try for a generic match based on class/subclass.
+ */
+ if ((pci_get_class(dev) == PCIC_BRIDGE) &&
+ (pci_get_subclass(dev) == PCIS_BRIDGE_ISA)) {
+ matched = 1;
+ } else {
+ /*
+ * These are devices that we *know* are PCI:ISA bridges.
+ * Sometimes, however, they don't report themselves as
+ * such. Check in case one of them is pretending to be
+ * something else.
+ */
+ switch (pci_get_devid(dev)) {
+ case 0x04848086: /* Intel 82378ZB/82378IB */
+ case 0x122e8086: /* Intel 82371FB */
+ case 0x70008086: /* Intel 82371SB */
+ case 0x71108086: /* Intel 82371AB */
+ case 0x71988086: /* Intel 82443MX */
+ case 0x24108086: /* Intel 82801AA (ICH) */
+ case 0x24208086: /* Intel 82801AB (ICH0) */
+ case 0x24408086: /* Intel 82801AB (ICH2) */
+ case 0x00061004: /* VLSI 82C593 */
+ case 0x05861106: /* VIA 82C586 */
+ case 0x05961106: /* VIA 82C596 */
+ case 0x06861106: /* VIA 82C686 */
+ case 0x153310b9: /* AcerLabs M1533 */
+ case 0x154310b9: /* AcerLabs M1543 */
+ case 0x00081039: /* SiS 85c503 */
+ case 0x00001078: /* Cyrix Cx5510 */
+ case 0x01001078: /* Cyrix Cx5530 */
+ case 0xc7001045: /* OPTi 82C700 (FireStar) */
+ case 0x00011033: /* NEC 0001 (C-bus) */
+ case 0x002c1033: /* NEC 002C (C-bus) */
+ case 0x003b1033: /* NEC 003B (C-bus) */
+ case 0x886a1060: /* UMC UM8886 ISA */
+ case 0x02001166: /* ServerWorks IB6566 PCI */
+ if (bootverbose)
+ printf("PCI-ISA bridge with incorrect subclass 0x%x\n",
+ pci_get_subclass(dev));
+ matched = 1;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ if (matched) {
+ device_set_desc(dev, "PCI-ISA bridge");
+ return(-10000);
+ }
+ return(ENXIO);
+}
+
+static int
+isab_attach(device_t dev)
+{
+ device_t child;
+ struct isab_softc *sc = device_get_softc(dev);
+ int error, rid;
+
+ /*
+ * Attach an ISA bus. Note that we can only have one ISA bus.
+ */
+ child = device_add_child(dev, "isa", 0);
+ if (child != NULL) {
+ error = bus_generic_attach(dev);
+ if (error)
+ return (error);
+ }
+
+ switch (pci_get_devid(dev)) {
+ case 0x71108086: /* Intel 82371AB */
+ /*
+ * Sometimes the ELCR (Edge/Level Control Register) is not restored
+ * correctly on resume by the BIOS, so we handle it ourselves.
+ */
+ rid = 0;
+ bus_set_resource(dev, SYS_RES_IOPORT, rid, ELCR_IOADDR, ELCR_IOLEN);
+ sc->elcr_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1,
+ RF_ACTIVE);
+ if (sc->elcr_res == NULL)
+ device_printf(dev, "failed to allocate ELCR resource\n");
+ break;
+ }
+
+ return(0);
+}
+
+static int
+isab_detach(device_t dev)
+{
+ struct isab_softc *sc = device_get_softc(dev);
+
+ if (sc->elcr_res != NULL)
+ bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->elcr_res);
+
+ return (bus_generic_detach(dev));
+}
+
+static int
+isab_suspend(device_t dev)
+{
+ struct isab_softc *sc = device_get_softc(dev);
+ bus_space_tag_t bst;
+ bus_space_handle_t bsh;
+ int i;
+
+ /* Save the ELCR if required. */
+ if (sc->elcr_res != NULL) {
+ bst = rman_get_bustag(sc->elcr_res);
+ bsh = rman_get_bushandle(sc->elcr_res);
+ for (i = 0; i < ELCR_IOLEN; i++)
+ sc->saved_elcr[i] = bus_space_read_1(bst, bsh, i);
+ }
+
+ return (bus_generic_suspend(dev));
+}
+
+static int
+isab_resume(device_t dev)
+{
+ struct isab_softc *sc = device_get_softc(dev);
+ bus_space_tag_t bst;
+ bus_space_handle_t bsh;
+ int i;
+
+ /* Restore the ELCR if required. */
+ if (sc->elcr_res != NULL) {
+ bst = rman_get_bustag(sc->elcr_res);
+ bsh = rman_get_bushandle(sc->elcr_res);
+ for (i = 0; i < ELCR_IOLEN; i++)
+ bus_space_write_1(bst, bsh, i, sc->saved_elcr[i]);
+ }
+
+ return (bus_generic_resume(dev));
+}
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