346 lines
10 KiB
C
346 lines
10 KiB
C
/* $NetBSD: puc.c,v 1.3 1999/02/06 06:29:54 cgd Exp $ */
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/*
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* Copyright (c) 1996, 1998, 1999
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* Christopher G. Demetriou. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* PCI "universal" communication card device driver, glues com, lpt,
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* and similar ports to PCI via bridge chip often much larger than
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* the devices being glued.
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*
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* Author: Christopher G. Demetriou, May 14, 1998 (derived from NetBSD
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* sys/dev/pci/pciide.c, revision 1.6).
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*
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* These devices could be (and some times are) described as
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* communications/{serial,parallel}, etc. devices with known
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* programming interfaces, but those programming interfaces (in
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* particular the BAR assignments for devices, etc.) in fact are not
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* particularly well defined.
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*
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* After I/we have seen more of these devices, it may be possible
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* to generalize some of these bits. In particular, devices which
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* describe themselves as communications/serial/16[45]50, and
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* communications/parallel/??? might be attached via direct
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* 'com' and 'lpt' attachments to pci.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pucvar.h>
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struct puc_softc {
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struct device sc_dev;
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/* static configuration data */
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const struct puc_device_description *sc_desc;
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/* card-global dynamic data */
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void *sc_ih;
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struct {
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int mapped;
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bus_addr_t a;
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bus_size_t s;
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bus_space_tag_t t;
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bus_space_handle_t h;
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} sc_bar_mappings[6]; /* XXX constant */
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/* per-port dynamic data */
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struct {
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struct device *dev;
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/* filled in by port attachments */
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int (*ihand) __P((void *));
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void *ihandarg;
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} sc_ports[PUC_MAX_PORTS];
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};
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int puc_match __P((struct device *, struct cfdata *, void *));
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void puc_attach __P((struct device *, struct device *, void *));
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int puc_print __P((void *, const char *));
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int puc_submatch __P((struct device *, struct cfdata *, void *));
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struct cfattach puc_ca = {
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sizeof(struct puc_softc), puc_match, puc_attach
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};
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static const struct puc_device_description *
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puc_find_description __P((pcireg_t, pcireg_t, pcireg_t, pcireg_t));
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static const char *
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puc_port_type_name __P((int));
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int
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puc_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct pci_attach_args *pa = aux;
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const struct puc_device_description *desc;
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pcireg_t bhlc, subsys;
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bhlc = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_BHLC_REG);
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if (PCI_HDRTYPE_TYPE(bhlc) != 0)
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return (0);
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subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
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desc = puc_find_description(PCI_VENDOR(pa->pa_id),
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PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys));
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if (desc != NULL)
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return (10);
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/*
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* Match class/subclass, so we can tell people to compile kernel
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* with options that cause this driver to spew.
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*/
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if (PCI_CLASS(pa->pa_class) == PCI_CLASS_COMMUNICATIONS &&
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PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_PCI)
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return (1);
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return (0);
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}
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void
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puc_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct puc_softc *sc = (struct puc_softc *)self;
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struct pci_attach_args *pa = aux;
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struct puc_attach_args paa;
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pci_intr_handle_t intrhandle;
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pcireg_t subsys;
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int i, barindex;
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subsys = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
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sc->sc_desc = puc_find_description(PCI_VENDOR(pa->pa_id),
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PCI_PRODUCT(pa->pa_id), PCI_VENDOR(subsys), PCI_PRODUCT(subsys));
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if (sc->sc_desc == NULL) {
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/*
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* This was a class/subclass match, so tell people to compile
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* kernel with options that cause this driver to spew.
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*/
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#ifdef PUC_PRINT_REGS
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printf(":\n");
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pci_conf_print(pa->pa_pc, pa->pa_tag, NULL);
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#else
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printf(": unknown PCI communications device\n");
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printf("%s: compile kernel with PUC_PRINT_REGS and larger\n",
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sc->sc_dev.dv_xname);
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printf("%s: mesage buffer (via 'options MSGBUFSIZE=...'),\n",
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sc->sc_dev.dv_xname);
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printf("%s: and report the result with send-pr\n",
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sc->sc_dev.dv_xname);
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#endif
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return;
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}
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printf(": %s (", sc->sc_desc->name);
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for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++)
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printf("%s%s", i ? ", " : "",
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puc_port_type_name(sc->sc_desc->ports[i].type));
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printf(")\n");
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/*
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* XXX This driver assumes that 'com' ports attached to it
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* XXX can not be console. That isn't unreasonable, because PCI
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* XXX devices are supposed to be dynamically mapped, and com
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* XXX console ports want fixed addresses. When/if baseboard
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* XXX 'com' ports are identified as PCI/communications/serial
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* XXX devices and are known to be mapped at the standard
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* XXX addresses, if they can be the system console then we have
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* XXX to cope with doing the mapping right. Then this will get
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* XXX really ugly. Of course, by then we might know the real
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* XXX definition of PCI/communications/serial, and attach 'com'
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* XXX directly on PCI.
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*/
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for (i = 0; i < 6; i++) {
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pcireg_t bar, type;
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sc->sc_bar_mappings[i].mapped = 0;
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bar = pci_conf_read(pa->pa_pc, pa->pa_tag,
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PCI_MAPREG_START + 4 * i); /* XXX const */
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if (bar == 0) /* BAR not implemented(?) */
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continue;
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type = (PCI_MAPREG_TYPE(bar) == PCI_MAPREG_TYPE_IO ?
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PCI_MAPREG_TYPE_IO : PCI_MAPREG_MEM_TYPE(bar));
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sc->sc_bar_mappings[i].mapped = (pci_mapreg_map(pa,
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PCI_MAPREG_START + 4 * i, type, 0,
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&sc->sc_bar_mappings[i].t, &sc->sc_bar_mappings[i].h,
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&sc->sc_bar_mappings[i].a, &sc->sc_bar_mappings[i].s)
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== 0);
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if (sc->sc_bar_mappings[i].mapped)
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continue;
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printf("%s: couldn't map BAR at offset 0x%lx\n",
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sc->sc_dev.dv_xname, (long)(PCI_MAPREG_START + 4 * i));
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}
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/* Map interrupt. */
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if (pci_intr_map(pa->pa_pc, pa->pa_intrtag, pa->pa_intrpin,
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pa->pa_intrline, &intrhandle)) {
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printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
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return;
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}
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/*
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* XXX the sub-devices establish the interrupts, for the
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* XXX following reasons:
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* XXX
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* XXX * we can't really know what IPLs they'd want
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* XXX
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* XXX * the MD dispatching code can ("should") dispatch
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* XXX chained interrupts better than we can.
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* XXX
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* XXX It would be nice if we could indicate to the MD interrupt
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* XXX handling code that the interrupt line used by the device
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* XXX was a PCI (level triggered) interrupt.
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* XXX
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* XXX It's not pretty, but hey, what is?
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*/
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/* Configure each port. */
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for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
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bus_space_handle_t subregion_handle;
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/* make sure the base address register is mapped */
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barindex = PUC_PORT_BAR_INDEX(sc->sc_desc->ports[i].bar);
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if (!sc->sc_bar_mappings[barindex].mapped) {
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printf("%s: %s port uses unmapped BAR (0x%x)\n",
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sc->sc_dev.dv_xname,
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puc_port_type_name(sc->sc_desc->ports[i].type),
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sc->sc_desc->ports[i].bar);
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continue;
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}
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/* set up to configure the child device */
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paa.port = i;
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paa.type = sc->sc_desc->ports[i].type;
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paa.pc = pa->pa_pc;
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paa.intrhandle = intrhandle;
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paa.a = sc->sc_bar_mappings[barindex].a;
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paa.t = sc->sc_bar_mappings[barindex].t;
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if (bus_space_subregion(sc->sc_bar_mappings[barindex].t,
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sc->sc_bar_mappings[barindex].h,
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sc->sc_desc->ports[i].offset,
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sc->sc_bar_mappings[barindex].s -
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sc->sc_desc->ports[i].offset,
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&subregion_handle)) {
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printf("%s: couldn't get subregion for port %d\n",
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sc->sc_dev.dv_xname, i);
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continue;
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}
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paa.h = subregion_handle;
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#if 0
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printf("%s: port %d: %s @ (index %d) 0x%x (0x%lx, 0x%lx)\n",
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sc->sc_dev.dv_xname, paa.port,
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puc_port_type_name(paa.type), barindex, (int)paa.a,
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(long)paa.t, (long)paa.h);
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#endif
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/* and configure it */
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sc->sc_ports[i].dev = config_found_sm(self, &paa, puc_print,
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puc_submatch);
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}
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}
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int
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puc_print(aux, pnp)
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void *aux;
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const char *pnp;
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{
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struct puc_attach_args *paa = aux;
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if (pnp)
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printf("%s at %s", puc_port_type_name(paa->type), pnp);
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printf(" port %d", paa->port);
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return (UNCONF);
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}
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int
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puc_submatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct puc_attach_args *aa = aux;
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if (cf->cf_loc[PUCCF_PORT] != PUCCF_PORT_DEFAULT &&
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cf->cf_loc[PUCCF_PORT] != aa->port)
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return 0;
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return ((*cf->cf_attach->ca_match)(parent, cf, aux));
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}
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static const struct puc_device_description *
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puc_find_description(vend, prod, svend, sprod)
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pcireg_t vend, prod, svend, sprod;
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{
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int i;
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#define checkreg(val, index) \
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(((val) & puc_devices[i].rmask[(index)]) == puc_devices[i].rval[(index)])
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for (i = 0; puc_devices[i].name != NULL; i++) {
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if (checkreg(vend, PUC_REG_VEND) &&
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checkreg(prod, PUC_REG_PROD) &&
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checkreg(svend, PUC_REG_SVEND) &&
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checkreg(sprod, PUC_REG_SPROD))
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return (&puc_devices[i]);
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}
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#undef checkreg
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return (NULL);
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}
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static const char *
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puc_port_type_name(type)
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int type;
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{
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switch (type) {
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case PUC_PORT_TYPE_COM:
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return "com";
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case PUC_PORT_TYPE_LPT:
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return "lpt";
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default:
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panic("puc_port_type_name %d", type);
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}
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}
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