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/* $OpenBSD: vga_pci.c,v 1.8 2000/11/15 20:17:38 aaron Exp $ */
/* $NetBSD: vga_pci.c,v 1.3 1998/06/08 06:55:58 thorpej Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/ic/mc6845reg.h>
#include <dev/ic/pcdisplayvar.h>
#include <dev/ic/vgareg.h>
#include <dev/ic/vgavar.h>
#include <dev/pci/vga_pcivar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
struct vga_pci_softc {
struct device sc_dev;
pcitag_t sc_pcitag; /* PCI tag, in case we need it. */
#if 0
struct vga_config *sc_vc; /* VGA configuration */
#endif
};
int vga_pci_match __P((struct device *, void *, void *));
void vga_pci_attach __P((struct device *, struct device *, void *));
struct cfattach vga_pci_ca = {
sizeof(struct vga_pci_softc), vga_pci_match, vga_pci_attach,
};
int
vga_pci_match(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
struct pci_attach_args *pa = aux;
int potential;
potential = 0;
/*
* If it's prehistoric/vga or display/vga, we might match.
* For the console device, this is jut a sanity check.
*/
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_PREHISTORIC &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_PREHISTORIC_VGA)
potential = 1;
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA)
potential = 1;
if (!potential)
return (0);
/* check whether it is disabled by firmware */
if ((pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG)
& (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE))
!= (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE))
return (0);
/* If it's the console, we have a winner! */
if (vga_is_console(pa->pa_iot, WSDISPLAY_TYPE_PCIVGA))
return (1);
/*
* If we might match, make sure that the card actually looks OK.
*/
if (!vga_common_probe(pa->pa_iot, pa->pa_memt))
return (0);
return (1);
}
void
vga_pci_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pci_attach_args *pa = aux;
struct vga_pci_softc *sc = (struct vga_pci_softc *)self;
char devinfo[256];
sc->sc_pcitag = pa->pa_tag;
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
printf(": %s (rev. 0x%02x)\n", devinfo,
PCI_REVISION(pa->pa_class));
vga_common_attach(self, pa->pa_iot, pa->pa_memt,
WSDISPLAY_TYPE_PCIVGA);
}
int
vga_pci_cnattach(iot, memt, pc, bus, device, function)
bus_space_tag_t iot, memt;
pci_chipset_tag_t pc;
int bus, device, function;
{
return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_PCIVGA, 0));
}
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