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/* $OpenBSD: vesafb.c,v 1.2 2006/12/02 20:20:55 matthieu Exp $ */
/*-
* Copyright (c) 2006 Jared D. McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 2006 Matthieu Herrb
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/bus.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/vesa/vesabiosreg.h>
#include <dev/vesa/vesabiosvar.h>
#include <machine/frame.h>
#include <machine/kvm86.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <uvm/uvm_extern.h>
void vesafb_set_mode(struct vga_pci_softc *, int);
int vesafb_get_mode(struct vga_pci_softc *);
void vesafb_get_mode_info(struct vga_pci_softc *, int, struct modeinfoblock *);
void vesafb_set_palette(struct vga_pci_softc *, int, struct paletteentry);
int vesafb_putcmap(struct vga_pci_softc *, struct wsdisplay_cmap *);
int vesafb_getcmap(struct vga_pci_softc *, struct wsdisplay_cmap *);
int
vesafb_get_mode(struct vga_pci_softc *sc)
{
struct trapframe tf;
int res;
bzero(&tf, sizeof(struct trapframe));
tf.tf_eax = 0x4f03;
res = kvm86_bioscall(0x10, &tf);
if (res || (tf.tf_eax & 0xff) != 0x4f) {
printf("%s: vbecall: res=%d, ax=%x\n",
sc->sc_dev.dv_xname, res, tf.tf_eax);
}
return tf.tf_ebx & 0xffff;
}
void
vesafb_get_mode_info(struct vga_pci_softc *sc, int mode,
struct modeinfoblock *mi)
{
struct trapframe tf;
unsigned char *buf;
int res;
buf = kvm86_bios_addpage(0x2000);
memset(&tf, 0, sizeof(struct trapframe));
tf.tf_eax = 0x4f01; /* function code */
tf.tf_ecx = mode;
tf.tf_vm86_es = 0;
tf.tf_edi = 0x2000; /* buf ptr */
res = kvm86_bioscall(0x10, &tf);
if (res || (tf.tf_eax & 0xff) != 0x4f) {
printf("%s: vbecall: res=%d, ax=%x\n",
sc->sc_dev.dv_xname, res, tf.tf_eax);
printf("%s: error getting info for mode %04x\n",
sc->sc_dev.dv_xname, mode);
return;
}
memcpy(mi, buf, sizeof(struct modeinfoblock));
kvm86_bios_delpage(0x2000, buf);
}
void
vesafb_set_palette(struct vga_pci_softc *sc, int reg, struct paletteentry pe)
{
struct trapframe tf;
int res;
char *buf;
buf = kvm86_bios_addpage(0x2000);
/*
* this function takes 8 bit per palette as input, but we're
* working in 6 bit mode here
*/
pe.Red >>= 2;
pe.Green >>= 2;
pe.Blue >>= 2;
memcpy(buf, &pe, sizeof(struct paletteentry));
/* set palette */
memset(&tf, 0, sizeof(struct trapframe));
tf.tf_eax = 0x4f09; /* function code */
tf.tf_ebx = 0x0600; /* 6 bit per primary, set format */
tf.tf_ecx = 1;
tf.tf_edx = reg;
tf.tf_vm86_es = 0;
tf.tf_edi = 0x2000;
res = kvm86_bioscall(0x10, &tf);
if (res || (tf.tf_eax & 0xff) != 0x4f)
printf("%s: vbecall: res=%d, ax=%x\n",
sc->sc_dev.dv_xname, res, tf.tf_eax);
kvm86_bios_delpage(0x2000, buf);
return;
}
void
vesafb_set_mode(struct vga_pci_softc *sc, int mode)
{
struct trapframe tf;
int res;
bzero(&tf, sizeof(struct trapframe));
tf.tf_eax = 0x4f02;
tf.tf_ebx = mode | 0x4000; /* flat */
res = kvm86_bioscall(0x10, &tf);
if (res || (tf.tf_eax & 0xff) != 0x4f) {
printf("%s: vbecall: res=%d, ax=%x\n",
sc->sc_dev.dv_xname, res, tf.tf_eax);
return;
}
}
int
vesafb_find_mode(struct vga_pci_softc *sc, int width, int height, int bpp)
{
struct modeinfoblock mi;
int i;
if (vesabios_softc == NULL || vesabios_softc->sc_nmodes == 0)
return -1;
#ifdef VESABIOSVERBOSE
printf("vesafb_find_mode %d %d %d\n", width, height, bpp);
#endif
/* Choose a graphics mode */
for (i = 0; i < vesabios_softc->sc_nmodes; i++) {
vesafb_get_mode_info(sc, vesabios_softc->sc_modes[i], &mi);
if (mi.XResolution == width &&
mi.YResolution == height &&
mi.BitsPerPixel == bpp) {
sc->sc_width = mi.XResolution;
sc->sc_height = mi.YResolution;
sc->sc_depth = mi.BitsPerPixel;
sc->sc_linebytes = mi.BytesPerScanLine;
sc->sc_base = mi.PhysBasePtr;
break;
}
}
if (i == vesabios_softc->sc_nmodes)
return -1;
else
return vesabios_softc->sc_modes[i];
}
int
vesafb_putcmap(struct vga_pci_softc *sc, struct wsdisplay_cmap *cm)
{
struct paletteentry pe;
u_int idx, cnt;
u_char r[256], g[256], b[256];
u_char *rp, *gp, *bp;
int rv, i;
idx = cm->index;
cnt = cm->count;
if (idx >= 255 || cnt > 256 || idx + cnt > 256)
return EINVAL;
rv = copyin(cm->red, &r[idx], cnt);
if (rv)
return rv;
rv = copyin(cm->green, &g[idx], cnt);
if (rv)
return rv;
rv = copyin(cm->blue, &b[idx], cnt);
if (rv)
return rv;
memcpy(&sc->sc_cmap_red[idx], &r[idx], cnt);
memcpy(&sc->sc_cmap_green[idx], &g[idx], cnt);
memcpy(&sc->sc_cmap_blue[idx], &b[idx], cnt);
rp = &sc->sc_cmap_red[idx];
gp = &sc->sc_cmap_green[idx];
bp = &sc->sc_cmap_blue[idx];
for (i = 0; i < cnt; i++) {
pe.Blue = *bp;
pe.Green = *gp;
pe.Red = *rp;
pe.Alignment = 0;
vesafb_set_palette(sc, idx, pe);
idx++;
rp++, gp++, bp++;
}
return 0;
}
int
vesafb_getcmap(struct vga_pci_softc *sc, struct wsdisplay_cmap *cm)
{
u_int idx, cnt;
int rv;
idx = cm->index;
cnt = cm->count;
if (idx >= 255 || cnt > 256 || idx + cnt > 256)
return EINVAL;
rv = copyout(&sc->sc_cmap_red[idx], cm->red, cnt);
if (rv)
return rv;
rv = copyout(&sc->sc_cmap_green[idx], cm->green, cnt);
if (rv)
return rv;
rv = copyout(&sc->sc_cmap_blue[idx], cm->blue, cnt);
if (rv)
return rv;
return 0;
}
static int
vesafb_getdepthflag(struct modeinfoblock *mi)
{
int bpp, depth;
depth = mi->RedMaskSize + mi->GreenMaskSize + mi->BlueMaskSize;
bpp = mi->BitsPerPixel;
switch (depth) {
case 1:
return WSDISPLAYIO_DEPTH_1;
case 4:
return WSDISPLAYIO_DEPTH_4;
case 8:
return WSDISPLAYIO_DEPTH_8;
case 15:
return WSDISPLAYIO_DEPTH_15;
case 16:
return WSDISPLAYIO_DEPTH_16;
case 24:
switch (bpp) {
case 24:
return WSDISPLAYIO_DEPTH_24_24;
case 32:
return WSDISPLAYIO_DEPTH_24_32;
}
}
return 0;
}
int
vesafb_get_supported_depth(struct vga_pci_softc *sc)
{
int i, depths;
struct modeinfoblock mi;
depths = 0;
if (vesabios_softc == NULL || vesabios_softc->sc_nmodes == 0)
return 0;
for (i = 0; i < vesabios_softc->sc_nmodes; i++) {
vesafb_get_mode_info(sc, vesabios_softc->sc_modes[i], &mi);
depths |= vesafb_getdepthflag(&mi);
}
return depths;
}
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