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/* $NetBSD: vga_pci.c,v 1.4 1996/12/05 01:39:38 cgd 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 <machine/autoconf.h>
#include <machine/pte.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <alpha/dev/vgavar.h>
#include <alpha/pci/vga_pcivar.h>
struct vga_pci_softc {
struct device sc_dev;
pcitag_t sc_pcitag; /* PCI tag, in case we need it. */
struct vga_config *sc_vc; /* VGA configuration */
};
#ifdef __BROKEN_INDIRECT_CONFIG
int vga_pci_match __P((struct device *, void *, void *));
#else
int vga_pci_match __P((struct device *, struct cfdata *, void *));
#endif
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,
};
pcitag_t vga_pci_console_tag;
struct vga_config vga_pci_console_vc;
int
vga_pci_match(parent, match, aux)
struct device *parent;
#ifdef __BROKEN_INDIRECT_CONFIG
void *match;
#else
struct cfdata *match;
#endif
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);
/* If it's the console, we have a winner! */
if (pa->pa_tag == vga_pci_console_tag)
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;
struct vga_config *vc;
char devinfo[256];
int console;
console = (pa->pa_tag == vga_pci_console_tag);
if (console)
vc = sc->sc_vc = &vga_pci_console_vc;
else {
vc = sc->sc_vc = (struct vga_config *)
malloc(sizeof(struct vga_config), M_DEVBUF, M_WAITOK);
/* set up bus-independent VGA configuration */
vga_common_setup(pa->pa_iot, pa->pa_memt, vc);
}
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_wscons_attach(self, vc, console);
}
void
vga_pci_console(iot, memt, pc, bus, device, function)
bus_space_tag_t iot, memt;
pci_chipset_tag_t pc;
int bus, device, function;
{
struct vga_config *vc = &vga_pci_console_vc;
/* for later recognition */
vga_pci_console_tag = pci_make_tag(pc, bus, device, function);
/* set up bus-independent VGA configuration */
vga_common_setup(iot, memt, vc);
vga_wscons_console(vc);
}
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