152 lines
3.9 KiB
C
152 lines
3.9 KiB
C
/* $NetBSD: vga_pci.c,v 1.8 1997/09/02 13:20:01 thorpej Exp $ */
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: vga_pci.c,v 1.8 1997/09/02 13:20:01 thorpej Exp $");
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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/device.h>
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#include <sys/malloc.h>
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#include <machine/autoconf.h>
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#include <machine/pte.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/pcidevs.h>
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#include <alpha/common/vgavar.h>
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#include <alpha/pci/vga_pcivar.h>
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struct vga_pci_softc {
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struct device sc_dev;
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pcitag_t sc_pcitag; /* PCI tag, in case we need it. */
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struct vga_config *sc_vc; /* VGA configuration */
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};
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int vga_pci_match __P((struct device *, struct cfdata *, void *));
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void vga_pci_attach __P((struct device *, struct device *, void *));
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struct cfattach vga_pci_ca = {
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sizeof(struct vga_pci_softc), vga_pci_match, vga_pci_attach,
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};
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pcitag_t vga_pci_console_tag;
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struct vga_config vga_pci_console_vc;
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int
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vga_pci_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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int potential;
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potential = 0;
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/*
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* If it's prehistoric/vga or display/vga, we might match.
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* For the console device, this is jut a sanity check.
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*/
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if (PCI_CLASS(pa->pa_class) == PCI_CLASS_PREHISTORIC &&
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PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_PREHISTORIC_VGA)
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potential = 1;
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if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY &&
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PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA)
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potential = 1;
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if (!potential)
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return (0);
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/* If it's the console, we have a winner! */
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if (pa->pa_tag == vga_pci_console_tag)
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return (1);
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/*
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* If we might match, make sure that the card actually looks OK.
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*/
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if (!vga_common_probe(pa->pa_iot, pa->pa_memt))
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return (0);
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return (1);
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}
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void
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vga_pci_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 pci_attach_args *pa = aux;
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struct vga_pci_softc *sc = (struct vga_pci_softc *)self;
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struct vga_config *vc;
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char devinfo[256];
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int console;
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console = (pa->pa_tag == vga_pci_console_tag);
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if (console)
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vc = sc->sc_vc = &vga_pci_console_vc;
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else {
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vc = sc->sc_vc = (struct vga_config *)
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malloc(sizeof(struct vga_config), M_DEVBUF, M_WAITOK);
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/* set up bus-independent VGA configuration */
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vga_common_setup(pa->pa_iot, pa->pa_memt, vc);
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}
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sc->sc_pcitag = pa->pa_tag;
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pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
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printf(": %s (rev. 0x%02x)\n", devinfo,
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PCI_REVISION(pa->pa_class));
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vga_wscons_attach(self, vc, console);
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}
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void
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vga_pci_console(iot, memt, pc, bus, device, function)
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bus_space_tag_t iot, memt;
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pci_chipset_tag_t pc;
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int bus, device, function;
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{
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struct vga_config *vc = &vga_pci_console_vc;
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/* for later recognition */
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vga_pci_console_tag = pci_make_tag(pc, bus, device, function);
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/* set up bus-independent VGA configuration */
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vga_common_setup(iot, memt, vc);
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vga_wscons_console(vc);
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}
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