281 lines
7.2 KiB
C
281 lines
7.2 KiB
C
/* $NetBSD: vga_pci.c,v 1.23 2003/06/29 22:30:29 fvdl 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/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: vga_pci.c,v 1.23 2003/06/29 22:30:29 fvdl Exp $");
|
|
|
|
#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/pci/pciio.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/isa/isareg.h> /* For legacy VGA address ranges */
|
|
|
|
#include <dev/wscons/wsconsio.h>
|
|
#include <dev/wscons/wsdisplayvar.h>
|
|
|
|
#define NBARS 6 /* number of PCI BARs */
|
|
|
|
struct vga_bar {
|
|
bus_addr_t vb_base;
|
|
bus_size_t vb_size;
|
|
pcireg_t vb_type;
|
|
int vb_flags;
|
|
};
|
|
|
|
struct vga_pci_softc {
|
|
struct vga_softc sc_vga;
|
|
|
|
pci_chipset_tag_t sc_pc;
|
|
pcitag_t sc_pcitag;
|
|
|
|
struct vga_bar sc_bars[NBARS];
|
|
struct vga_bar sc_rom;
|
|
};
|
|
|
|
int vga_pci_match(struct device *, struct cfdata *, void *);
|
|
void vga_pci_attach(struct device *, struct device *, void *);
|
|
static int vga_pci_lookup_quirks(struct pci_attach_args *);
|
|
|
|
CFATTACH_DECL(vga_pci, sizeof(struct vga_pci_softc),
|
|
vga_pci_match, vga_pci_attach, NULL, NULL);
|
|
|
|
int vga_pci_ioctl(void *, u_long, caddr_t, int, struct proc *);
|
|
paddr_t vga_pci_mmap(void *, off_t, int);
|
|
|
|
const struct vga_funcs vga_pci_funcs = {
|
|
vga_pci_ioctl,
|
|
vga_pci_mmap,
|
|
};
|
|
|
|
static const struct {
|
|
int id;
|
|
int quirks;
|
|
} vga_pci_quirks[] = {
|
|
{PCI_ID_CODE(PCI_VENDOR_SILMOTION, PCI_PRODUCT_SILMOTION_SM712),
|
|
VGA_QUIRK_NOFASTSCROLL},
|
|
};
|
|
|
|
static const struct {
|
|
int vid;
|
|
int quirks;
|
|
} vga_pci_vquirks[] = {
|
|
{PCI_VENDOR_ATI, VGA_QUIRK_ONEFONT},
|
|
};
|
|
|
|
static int
|
|
vga_pci_lookup_quirks(pa)
|
|
struct pci_attach_args *pa;
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(vga_pci_quirks) / sizeof (vga_pci_quirks[0]);
|
|
i++) {
|
|
if (vga_pci_quirks[i].id == pa->pa_id)
|
|
return (vga_pci_quirks[i].quirks);
|
|
}
|
|
for (i = 0; i < sizeof(vga_pci_vquirks) / sizeof (vga_pci_vquirks[0]);
|
|
i++) {
|
|
if (vga_pci_vquirks[i].vid == PCI_VENDOR(pa->pa_id))
|
|
return (vga_pci_vquirks[i].quirks);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
vga_pci_match(struct device *parent, struct cfdata *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(struct device *parent, struct device *self, void *aux)
|
|
{
|
|
struct vga_pci_softc *psc = (void *) self;
|
|
struct vga_softc *sc = &psc->sc_vga;
|
|
struct pci_attach_args *pa = aux;
|
|
char devinfo[256];
|
|
int bar, reg;
|
|
|
|
psc->sc_pc = pa->pa_pc;
|
|
psc->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));
|
|
|
|
/*
|
|
* Gather info about all the BARs. These are used to allow
|
|
* the X server to map the VGA device.
|
|
*/
|
|
for (bar = 0; bar < NBARS; bar++) {
|
|
reg = PCI_MAPREG_START + (bar * 4);
|
|
if (!pci_mapreg_probe(psc->sc_pc, psc->sc_pcitag, reg,
|
|
&psc->sc_bars[bar].vb_type)) {
|
|
/* there is no valid mapping register */
|
|
continue;
|
|
}
|
|
if (PCI_MAPREG_TYPE(psc->sc_bars[bar].vb_type) ==
|
|
PCI_MAPREG_TYPE_IO) {
|
|
/* Don't bother fetching I/O BARs. */
|
|
continue;
|
|
}
|
|
if (PCI_MAPREG_MEM_TYPE(psc->sc_bars[bar].vb_type) ==
|
|
PCI_MAPREG_MEM_TYPE_64BIT) {
|
|
/* XXX */
|
|
printf("%s: WARNING: ignoring 64-bit BAR @ 0x%02x\n",
|
|
sc->sc_dev.dv_xname, reg);
|
|
bar++;
|
|
continue;
|
|
}
|
|
if (pci_mapreg_info(psc->sc_pc, psc->sc_pcitag, reg,
|
|
psc->sc_bars[bar].vb_type,
|
|
&psc->sc_bars[bar].vb_base,
|
|
&psc->sc_bars[bar].vb_size,
|
|
&psc->sc_bars[bar].vb_flags))
|
|
printf("%s: WARNING: strange BAR @ 0x%02x\n",
|
|
sc->sc_dev.dv_xname, reg);
|
|
}
|
|
|
|
/* XXX Expansion ROM? */
|
|
|
|
vga_common_attach(sc, pa->pa_iot, pa->pa_memt, WSDISPLAY_TYPE_PCIVGA,
|
|
vga_pci_lookup_quirks(pa), &vga_pci_funcs);
|
|
}
|
|
|
|
int
|
|
vga_pci_cnattach(bus_space_tag_t iot, bus_space_tag_t memt,
|
|
pci_chipset_tag_t pc, int bus, int device, int function)
|
|
{
|
|
|
|
return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_PCIVGA, 0));
|
|
}
|
|
|
|
int
|
|
vga_pci_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
|
|
{
|
|
struct vga_config *vc = v;
|
|
struct vga_pci_softc *psc = (void *) vc->softc;
|
|
|
|
switch (cmd) {
|
|
/* PCI config read/write passthrough. */
|
|
case PCI_IOC_CFGREAD:
|
|
case PCI_IOC_CFGWRITE:
|
|
return (pci_devioctl(psc->sc_pc, psc->sc_pcitag,
|
|
cmd, data, flag, p));
|
|
|
|
default:
|
|
return (EPASSTHROUGH);
|
|
}
|
|
}
|
|
|
|
paddr_t
|
|
vga_pci_mmap(void *v, off_t offset, int prot)
|
|
{
|
|
struct vga_config *vc = v;
|
|
struct vga_pci_softc *psc = (void *) vc->softc;
|
|
struct vga_bar *vb;
|
|
int bar;
|
|
|
|
for (bar = 0; bar < NBARS; bar++) {
|
|
vb = &psc->sc_bars[bar];
|
|
if (vb->vb_size == 0)
|
|
continue;
|
|
if (offset >= vb->vb_base &&
|
|
offset < (vb->vb_base + vb->vb_size)) {
|
|
/* XXX This the right thing to do with flags? */
|
|
return (bus_space_mmap(vc->hdl.vh_memt, vb->vb_base,
|
|
(offset - vb->vb_base), prot, vb->vb_flags));
|
|
}
|
|
}
|
|
|
|
/* XXX Expansion ROM? */
|
|
|
|
/*
|
|
* Allow mmap access to the legacy ISA hole. This is where
|
|
* the legacy video BIOS will be located, and also where
|
|
* the legacy VGA display buffer is located.
|
|
*
|
|
* XXX Security implications, here?
|
|
*/
|
|
if (offset >= IOM_BEGIN && offset < IOM_END)
|
|
return (bus_space_mmap(vc->hdl.vh_memt, IOM_BEGIN,
|
|
(offset - IOM_BEGIN), prot, 0));
|
|
|
|
/* Range not found. */
|
|
return (-1);
|
|
}
|