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freebsd-nq/sys/i386/isa/vga_isa.c
Kazutaka YOKOTA 170f96bb1a This is a temporary workaround for kernel panic occurring when 
switching video modes.  People typically see the panic when the screen
saver has been running and is being stopped.

WARNING: this is not a real fix.  Something really funny must be
happening in the page table entries for the physical memory
0x0-0xa0000, which is mapped to the beginning of the kernel region.
1999-03-15 00:20:56 +00:00

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/*-
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
* Copyright (c) 1992-1998 Søren Schmidt
* 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 as
* the first lines of this file unmodified.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.
*
* $Id: vga_isa.c,v 1.4 1999/02/05 12:58:40 yokota Exp $
*/
#include "vga.h"
#include "opt_vga.h"
#include "opt_fb.h"
#include "opt_syscons.h" /* should be removed in the future, XXX */
#if NVGA > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/console.h>
#include <machine/md_var.h>
#include <machine/pc/bios.h>
#include <dev/fb/fbreg.h>
#include <dev/fb/vgareg.h>
#ifndef __i386__
#include <isa/isareg.h>
#include <isa/isavar.h>
#else
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#endif
#define DRIVER_NAME "vga"
/* cdev driver declaration */
#define ISAVGA_UNIT(dev) minor(dev)
#define ISAVGA_MKMINOR(unit) (unit)
typedef struct isavga_softc {
video_adapter_t *adp;
} isavga_softc_t;
#ifndef __i386__
#define ISAVGA_SOFTC(unit) \
((isavga_softc_t *)devclass_get_softc(isavga_devclass, unit))
devclass_t isavga_devclass;
static int isavga_probe(device_t dev);
static int isavga_attach(device_t dev);
static device_method_t isavga_methods[] = {
DEVMETHOD(device_probe, isavga_probe),
DEVMETHOD(device_attach, isavga_attach),
{ 0, 0 }
};
static driver_t isavga_driver = {
DRIVER_NAME,
isavga_methods,
DRIVER_TYPE_TTY,
sizeof(isavga_softc_t),
};
#else /* __i386__ */
#define ISAVGA_SOFTC(unit) (isavga_softc[unit])
static isavga_softc_t *isavga_softc[NVGA];
static int isavga_probe(struct isa_device *dev);
static int isavga_attach(struct isa_device *dev);
struct isa_driver vgadriver = {
isavga_probe,
isavga_attach,
DRIVER_NAME,
0,
};
#endif /* __i386__ */
static int isavga_probe_unit(int unit, isavga_softc_t *sc,
int flags);
static int isavga_attach_unit(int unit, isavga_softc_t *sc,
int flags);
#ifdef FB_INSTALL_CDEV
static d_open_t isavgaopen;
static d_close_t isavgaclose;
static d_read_t isavgaread;
static d_ioctl_t isavgaioctl;
static struct cdevsw vga_cdevsw = {
isavgaopen, isavgaclose, noread, nowrite, /* ?? */
isavgaioctl, nostop, nullreset, nodevtotty,
seltrue, nommap, NULL, DRIVER_NAME,
NULL, -1, nodump, nopsize,
};
#endif /* FB_INSTALL_CDEV */
#ifndef __i386__
static int
isavga_probe(device_t dev)
{
isavga_softc_t *sc;
sc = device_get_softc(dev);
return isavga_probe_unit(device_get_unit(dev), sc, isa_get_flags(dev));
}
static int
isavga_attach(device_t dev)
{
isavga_softc_t *sc;
sc = device_get_softc(dev);
return isavga_attach_unit(device_get_unit(dev), sc, isa_get_flags(dev));
}
#else /* __i386__ */
static int
isavga_probe(struct isa_device *dev)
{
isavga_softc_t *sc;
int error;
if (dev->id_unit >= sizeof(isavga_softc)/sizeof(isavga_softc[0]))
return 0;
sc = isavga_softc[dev->id_unit]
= malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT);
if (sc == NULL)
return 0;
error = isavga_probe_unit(dev->id_unit, sc, dev->id_flags);
if (error) {
isavga_softc[dev->id_unit] = NULL;
free(sc, M_DEVBUF);
return 0;
}
dev->id_iobase = sc->adp->va_io_base;
dev->id_maddr = (caddr_t)BIOS_PADDRTOVADDR(sc->adp->va_mem_base);
dev->id_msize = sc->adp->va_mem_size;
return sc->adp->va_io_size;
}
static int
isavga_attach(struct isa_device *dev)
{
isavga_softc_t *sc;
if (dev->id_unit >= sizeof(isavga_softc)/sizeof(isavga_softc[0]))
return 0;
sc = isavga_softc[dev->id_unit];
if (sc == NULL)
return 0;
return ((isavga_attach_unit(dev->id_unit, sc, dev->id_flags)) ? 0 : 1);
}
#endif /* __i386__ */
static int
isavga_probe_unit(int unit, isavga_softc_t *sc, int flags)
{
video_switch_t *sw;
bzero(sc, sizeof(*sc));
sw = vid_get_switch(DRIVER_NAME);
if (sw == NULL)
return 0;
return (*sw->probe)(unit, &sc->adp, NULL, flags);
}
static int
isavga_attach_unit(int unit, isavga_softc_t *sc, int flags)
{
video_switch_t *sw;
int error;
sw = vid_get_switch(DRIVER_NAME);
if (sw == NULL)
return ENXIO;
error = (*sw->init)(unit, sc->adp, flags);
if (error)
return ENXIO;
#ifdef FB_INSTALL_CDEV
/* attach a virtual frame buffer device */
error = fb_attach(makedev(0, ISAVGA_MKMINOR(unit)), scp->adp,
&vga_cdevsw);
if (error)
return error;
#endif /* FB_INSTALL_CDEV */
if (bootverbose)
(*vidsw[sc->adp->va_index]->diag)(sc->adp, bootverbose);
return 0;
}
/* LOW-LEVEL */
#include <machine/clock.h>
#include <machine/pc/vesa.h>
#define probe_done(adp) ((adp)->va_flags & V_ADP_PROBED)
#define init_done(adp) ((adp)->va_flags & V_ADP_INITIALIZED)
#define config_done(adp) ((adp)->va_flags & V_ADP_REGISTERED)
/* for compatibility with old kernel options */
#ifdef SC_ALT_SEQACCESS
#undef SC_ALT_SEQACCESS
#undef VGA_ALT_SEQACCESS
#define VGA_ALT_SEQACCESS 1
#endif
#ifdef SLOW_VGA
#undef SLOW_VGA
#undef VGA_SLOW_IOACCESS
#define VGA_SLOW_IOACCESS 1
#endif
/* architecture dependent option */
#ifdef __alpha__
#define VGA_NO_BIOS 1
#endif
/* this should really be in `rtc.h' */
#define RTC_EQUIPMENT 0x14
/* various sizes */
#define V_MODE_MAP_SIZE (M_VGA_CG320 + 1)
#define V_MODE_PARAM_SIZE 64
/* video adapter state buffer */
struct adp_state {
int sig;
#define V_STATE_SIG 0x736f6962
u_char regs[V_MODE_PARAM_SIZE];
};
typedef struct adp_state adp_state_t;
/* video adapter information */
#define DCC_MONO 0
#define DCC_CGA40 1
#define DCC_CGA80 2
#define DCC_EGAMONO 3
#define DCC_EGA40 4
#define DCC_EGA80 5
/*
* NOTE: `va_window' should have a virtual address, but is initialized
* with a physical address in the following table, as verify_adapter()
* will perform address conversion at run-time.
*/
static video_adapter_t adapter_init_value[] = {
/* DCC_MONO */
{ 0, KD_MONO, "mda", 0, 0, 0, IO_MDA, IO_MDASIZE, MONO_CRTC,
MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE,
0, 0, 0, 7, 0, },
/* DCC_CGA40 */
{ 0, KD_CGA, "cga", 0, 0, V_ADP_COLOR, IO_CGA, IO_CGASIZE, COLOR_CRTC,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE,
0, 0, 0, 3, 0, },
/* DCC_CGA80 */
{ 0, KD_CGA, "cga", 0, 0, V_ADP_COLOR, IO_CGA, IO_CGASIZE, COLOR_CRTC,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE,
0, 0, 0, 3, 0, },
/* DCC_EGAMONO */
{ 0, KD_EGA, "ega", 0, 0, 0, IO_MDA, 48, MONO_CRTC,
EGA_BUF_BASE, EGA_BUF_SIZE, MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE,
0, 0, 0, 7, 0, },
/* DCC_EGA40 */
{ 0, KD_EGA, "ega", 0, 0, V_ADP_COLOR, IO_MDA, 48, COLOR_CRTC,
EGA_BUF_BASE, EGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE,
0, 0, 0, 3, 0, },
/* DCC_EGA80 */
{ 0, KD_EGA, "ega", 0, 0, V_ADP_COLOR, IO_MDA, 48, COLOR_CRTC,
EGA_BUF_BASE, EGA_BUF_SIZE, CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE,
0, 0, 0, 3, 0, },
};
static video_adapter_t biosadapter[2];
static int biosadapters = 0;
/* video driver declarations */
static int vga_configure(int flags);
int (*vga_sub_configure)(int flags);
static int vga_nop(void);
static vi_probe_t vga_probe;
static vi_init_t vga_init;
static vi_get_info_t vga_get_info;
static vi_query_mode_t vga_query_mode;
static vi_set_mode_t vga_set_mode;
static vi_save_font_t vga_save_font;
static vi_load_font_t vga_load_font;
static vi_show_font_t vga_show_font;
static vi_save_palette_t vga_save_palette;
static vi_load_palette_t vga_load_palette;
static vi_set_border_t vga_set_border;
static vi_save_state_t vga_save_state;
static vi_load_state_t vga_load_state;
static vi_set_win_org_t vga_set_origin;
static vi_read_hw_cursor_t vga_read_hw_cursor;
static vi_set_hw_cursor_t vga_set_hw_cursor;
static vi_set_hw_cursor_shape_t vga_set_hw_cursor_shape;
static vi_mmap_t vga_mmap;
static vi_diag_t vga_diag;
static video_switch_t vgavidsw = {
vga_probe,
vga_init,
vga_get_info,
vga_query_mode,
vga_set_mode,
vga_save_font,
vga_load_font,
vga_show_font,
vga_save_palette,
vga_load_palette,
vga_set_border,
vga_save_state,
vga_load_state,
vga_set_origin,
vga_read_hw_cursor,
vga_set_hw_cursor,
vga_set_hw_cursor_shape,
(vi_blank_display_t *)vga_nop,
vga_mmap,
vga_diag,
};
VIDEO_DRIVER(mda, vgavidsw, NULL);
VIDEO_DRIVER(cga, vgavidsw, NULL);
VIDEO_DRIVER(ega, vgavidsw, NULL);
VIDEO_DRIVER(vga, vgavidsw, vga_configure);
/* VGA BIOS standard video modes */
#define EOT (-1)
#define NA (-2)
static video_info_t bios_vmode[] = {
/* CGA */
{ M_B40x25, V_INFO_COLOR, 40, 25, 8, 8, 2, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_C40x25, V_INFO_COLOR, 40, 25, 8, 8, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_B80x25, V_INFO_COLOR, 80, 25, 8, 8, 2, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_C80x25, V_INFO_COLOR, 80, 25, 8, 8, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
/* EGA */
{ M_ENH_B40x25, V_INFO_COLOR, 40, 25, 8, 14, 2, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_ENH_C40x25, V_INFO_COLOR, 40, 25, 8, 14, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_ENH_B80x25, V_INFO_COLOR, 80, 25, 8, 14, 2, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_ENH_C80x25, V_INFO_COLOR, 80, 25, 8, 14, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
/* VGA */
{ M_VGA_C40x25, V_INFO_COLOR, 40, 25, 8, 16, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_VGA_M80x25, 0, 80, 25, 8, 16, 2, 1,
MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
{ M_VGA_C80x25, V_INFO_COLOR, 80, 25, 8, 16, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
/* MDA */
{ M_EGAMONO80x25, 0, 80, 25, 8, 14, 2, 1,
MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
/* EGA */
{ M_ENH_B80x43, V_INFO_COLOR, 80, 43, 8, 8, 2, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_ENH_C80x43, V_INFO_COLOR, 80, 43, 8, 8, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
/* VGA */
{ M_VGA_M80x30, 0, 80, 30, 8, 16, 2, 1,
MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
{ M_VGA_C80x30, V_INFO_COLOR, 80, 30, 8, 16, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_VGA_M80x50, 0, 80, 50, 8, 8, 2, 1,
MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
{ M_VGA_C80x50, V_INFO_COLOR, 80, 50, 8, 8, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_VGA_M80x60, 0, 80, 60, 8, 8, 2, 1,
MDA_BUF_BASE, MDA_BUF_SIZE, MDA_BUF_SIZE, 0, 0 },
{ M_VGA_C80x60, V_INFO_COLOR, 80, 60, 8, 8, 4, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
#ifndef VGA_NO_MODE_CHANGE
/* CGA */
{ M_BG320, V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8, 8, 2, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_CG320, V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8, 8, 2, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
{ M_BG640, V_INFO_COLOR | V_INFO_GRAPHICS, 640, 200, 8, 8, 1, 1,
CGA_BUF_BASE, CGA_BUF_SIZE, CGA_BUF_SIZE, 0, 0 },
/* EGA */
{ M_CG320_D, V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8, 8, 4, 4,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
{ M_CG640_E, V_INFO_COLOR | V_INFO_GRAPHICS, 640, 200, 8, 8, 4, 4,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
{ M_EGAMONOAPA, V_INFO_GRAPHICS, 640, 350, 8, 14, 4, 4,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, 64*1024, 0, 0 },
{ M_ENHMONOAPA2,V_INFO_GRAPHICS, 640, 350, 8, 14, 4, 4,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
{ M_CG640x350, V_INFO_COLOR | V_INFO_GRAPHICS, 640, 350, 8, 14, 2, 2,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
{ M_ENH_CG640, V_INFO_COLOR | V_INFO_GRAPHICS, 640, 350, 8, 14, 4, 4,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
/* VGA */
{ M_BG640x480, V_INFO_COLOR | V_INFO_GRAPHICS, 640, 480, 8, 16, 4, 4,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
{ M_CG640x480, V_INFO_COLOR | V_INFO_GRAPHICS, 640, 480, 8, 16, 4, 4,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
{ M_VGA_CG320, V_INFO_COLOR | V_INFO_GRAPHICS, 320, 200, 8, 8, 8, 1,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
{ M_VGA_MODEX, V_INFO_COLOR | V_INFO_GRAPHICS, 320, 240, 8, 8, 8, 1,
GRAPHICS_BUF_BASE, GRAPHICS_BUF_SIZE, GRAPHICS_BUF_SIZE, 0, 0 },
#endif /* VGA_NO_MODE_CHANGE */
{ EOT },
};
static int init_done = FALSE;
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
static u_char *video_mode_ptr = NULL; /* EGA/VGA */
static u_char *video_mode_ptr2 = NULL; /* CGA/MDA */
#endif
static u_char *mode_map[V_MODE_MAP_SIZE];
static adp_state_t adpstate;
static adp_state_t adpstate2;
static int rows_offset = 1;
/* local macros and functions */
#define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
static void map_mode_table(u_char *map[], u_char *table, int max);
#endif
static void clear_mode_map(video_adapter_t *adp, u_char *map[], int max,
int color);
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
static int map_mode_num(int mode);
#endif
static int map_gen_mode_num(int type, int color, int mode);
static int map_bios_mode_num(int type, int color, int bios_mode);
static u_char *get_mode_param(int mode);
#ifndef VGA_NO_BIOS
static void fill_adapter_param(int code, video_adapter_t *adp);
#endif
static int verify_adapter(video_adapter_t *adp);
static void update_adapter_info(video_adapter_t *adp, video_info_t *info);
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
#define COMP_IDENTICAL 0
#define COMP_SIMILAR 1
#define COMP_DIFFERENT 2
static int comp_adpregs(u_char *buf1, u_char *buf2);
#endif
static int probe_adapters(void);
#ifndef VGA_NO_FONT_LOADING
#define PARAM_BUFSIZE 6
static void set_font_mode(video_adapter_t *adp, u_char *buf);
static void set_normal_mode(video_adapter_t *adp, u_char *buf);
#endif
static void dump_buffer(u_char *buf, size_t len);
#define ISMAPPED(pa, width) \
(((pa) <= (u_long)0x1000 - (width)) \
|| ((pa) >= ISA_HOLE_START && (pa) <= 0x100000 - (width)))
#define prologue(adp, flag, err) \
if (!init_done || !((adp)->va_flags & (flag))) \
return (err)
/* a backdoor for the console driver */
static int
vga_configure(int flags)
{
int i;
probe_adapters();
for (i = 0; i < biosadapters; ++i) {
if (!probe_done(&biosadapter[i]))
continue;
biosadapter[i].va_flags |= V_ADP_INITIALIZED;
if (!config_done(&biosadapter[i])) {
if (vid_register(&biosadapter[i]) < 0)
continue;
biosadapter[i].va_flags |= V_ADP_REGISTERED;
}
}
if (vga_sub_configure != NULL)
(*vga_sub_configure)(flags);
return biosadapters;
}
/* local subroutines */
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
/* construct the mode parameter map */
static void
map_mode_table(u_char *map[], u_char *table, int max)
{
int i;
for(i = 0; i < max; ++i)
map[i] = table + i*V_MODE_PARAM_SIZE;
for(; i < V_MODE_MAP_SIZE; ++i)
map[i] = NULL;
}
#endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
static void
clear_mode_map(video_adapter_t *adp, u_char *map[], int max, int color)
{
video_info_t info;
int i;
/*
* NOTE: we don't touch `bios_vmode[]' because it is shared
* by all adapters.
*/
for(i = 0; i < max; ++i) {
if (vga_get_info(adp, i, &info))
continue;
if ((info.vi_flags & V_INFO_COLOR) != color)
map[i] = NULL;
}
}
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
/* map the non-standard video mode to a known mode number */
static int
map_mode_num(int mode)
{
static struct {
int from;
int to;
} mode_map[] = {
{ M_ENH_B80x43, M_ENH_B80x25 },
{ M_ENH_C80x43, M_ENH_C80x25 },
{ M_VGA_M80x30, M_VGA_M80x25 },
{ M_VGA_C80x30, M_VGA_C80x25 },
{ M_VGA_M80x50, M_VGA_M80x25 },
{ M_VGA_C80x50, M_VGA_C80x25 },
{ M_VGA_M80x60, M_VGA_M80x25 },
{ M_VGA_C80x60, M_VGA_C80x25 },
{ M_VGA_MODEX, M_VGA_CG320 },
};
int i;
for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
if (mode_map[i].from == mode)
return mode_map[i].to;
}
return mode;
}
#endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
/* map a generic video mode to a known mode number */
static int
map_gen_mode_num(int type, int color, int mode)
{
static struct {
int from;
int to_color;
int to_mono;
} mode_map[] = {
{ M_TEXT_80x30, M_VGA_C80x30, M_VGA_M80x30, },
{ M_TEXT_80x43, M_ENH_C80x43, M_ENH_B80x43, },
{ M_TEXT_80x50, M_VGA_C80x50, M_VGA_M80x50, },
{ M_TEXT_80x60, M_VGA_C80x60, M_VGA_M80x60, },
};
int i;
if (mode == M_TEXT_80x25) {
switch (type) {
case KD_VGA:
if (color)
return M_VGA_C80x25;
else
return M_VGA_M80x25;
break;
case KD_EGA:
if (color)
return M_ENH_C80x25;
else
return M_EGAMONO80x25;
break;
case KD_CGA:
return M_C80x25;
case KD_MONO:
case KD_HERCULES:
return M_EGAMONO80x25; /* XXX: this name is confusing */
default:
return -1;
}
}
for (i = 0; i < sizeof(mode_map)/sizeof(mode_map[0]); ++i) {
if (mode_map[i].from == mode)
return ((color) ? mode_map[i].to_color : mode_map[i].to_mono);
}
return mode;
}
/* turn the BIOS video number into our video mode number */
static int
map_bios_mode_num(int type, int color, int bios_mode)
{
static int cga_modes[7] = {
M_B40x25, M_C40x25, /* 0, 1 */
M_B80x25, M_C80x25, /* 2, 3 */
M_BG320, M_CG320,
M_BG640,
};
static int ega_modes[17] = {
M_ENH_B40x25, M_ENH_C40x25, /* 0, 1 */
M_ENH_B80x25, M_ENH_C80x25, /* 2, 3 */
M_BG320, M_CG320,
M_BG640,
M_EGAMONO80x25, /* 7 */
8, 9, 10, 11, 12,
M_CG320_D,
M_CG640_E,
M_ENHMONOAPA2, /* XXX: video momery > 64K */
M_ENH_CG640, /* XXX: video momery > 64K */
};
static int vga_modes[20] = {
M_VGA_C40x25, M_VGA_C40x25, /* 0, 1 */
M_VGA_C80x25, M_VGA_C80x25, /* 2, 3 */
M_BG320, M_CG320,
M_BG640,
M_VGA_M80x25, /* 7 */
8, 9, 10, 11, 12,
M_CG320_D,
M_CG640_E,
M_ENHMONOAPA2,
M_ENH_CG640,
M_BG640x480, M_CG640x480,
M_VGA_CG320,
};
switch (type) {
case KD_VGA:
if (bios_mode < sizeof(vga_modes)/sizeof(vga_modes[0]))
return vga_modes[bios_mode];
else if (color)
return M_VGA_C80x25;
else
return M_VGA_M80x25;
break;
case KD_EGA:
if (bios_mode < sizeof(ega_modes)/sizeof(ega_modes[0]))
return ega_modes[bios_mode];
else if (color)
return M_ENH_C80x25;
else
return M_EGAMONO80x25;
break;
case KD_CGA:
if (bios_mode < sizeof(cga_modes)/sizeof(cga_modes[0]))
return cga_modes[bios_mode];
else
return M_C80x25;
break;
case KD_MONO:
case KD_HERCULES:
return M_EGAMONO80x25; /* XXX: this name is confusing */
default:
break;
}
return -1;
}
/* look up a parameter table entry */
static u_char
*get_mode_param(int mode)
{
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
if (mode >= V_MODE_MAP_SIZE)
mode = map_mode_num(mode);
#endif
if ((mode >= 0) && (mode < V_MODE_MAP_SIZE))
return mode_map[mode];
else
return NULL;
}
#ifndef VGA_NO_BIOS
static void
fill_adapter_param(int code, video_adapter_t *adp)
{
static struct {
int primary;
int secondary;
} dcc[] = {
{ DCC_MONO, DCC_EGA40 /* CGA monitor */ },
{ DCC_MONO, DCC_EGA80 /* CGA monitor */ },
{ DCC_MONO, DCC_EGA80 /* CGA emulation */ },
{ DCC_MONO, DCC_EGA80 },
{ DCC_CGA40, DCC_EGAMONO },
{ DCC_CGA80, DCC_EGAMONO },
{ DCC_EGA40 /* CGA monitor */, DCC_MONO},
{ DCC_EGA80 /* CGA monitor */, DCC_MONO},
{ DCC_EGA80 /* CGA emulation */,DCC_MONO },
{ DCC_EGA80, DCC_MONO },
{ DCC_EGAMONO, DCC_CGA40 },
{ DCC_EGAMONO, DCC_CGA40 },
};
if ((code < 0) || (code >= sizeof(dcc)/sizeof(dcc[0]))) {
adp[V_ADP_PRIMARY] = adapter_init_value[DCC_MONO];
adp[V_ADP_SECONDARY] = adapter_init_value[DCC_CGA80];
} else {
adp[V_ADP_PRIMARY] = adapter_init_value[dcc[code].primary];
adp[V_ADP_SECONDARY] = adapter_init_value[dcc[code].secondary];
}
}
#endif /* VGA_NO_BIOS */
static int
verify_adapter(video_adapter_t *adp)
{
volatile u_int16_t *buf;
u_int16_t v;
u_int32_t p;
buf = (u_int16_t *)BIOS_PADDRTOVADDR(adp->va_window);
v = readw(buf);
writew(buf, 0xA55A);
if (readw(buf) != 0xA55A)
return 1;
writew(buf, v);
switch (adp->va_type) {
case KD_EGA:
outb(adp->va_crtc_addr, 7);
if (inb(adp->va_crtc_addr) == 7) {
adp->va_type = KD_VGA;
adp->va_name = "vga";
adp->va_flags |= V_ADP_STATESAVE | V_ADP_PALETTE;
}
adp->va_flags |= V_ADP_STATELOAD | V_ADP_BORDER;
/* the color adapter may be in the 40x25 mode... XXX */
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
/* get the BIOS video mode pointer */
p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x4a8);
p = BIOS_SADDRTOLADDR(p);
if (ISMAPPED(p, sizeof(u_int32_t))) {
p = *(u_int32_t *)BIOS_PADDRTOVADDR(p);
p = BIOS_SADDRTOLADDR(p);
if (ISMAPPED(p, V_MODE_PARAM_SIZE))
video_mode_ptr = (u_char *)BIOS_PADDRTOVADDR(p);
}
#endif
break;
case KD_CGA:
adp->va_flags |= V_ADP_COLOR | V_ADP_BORDER;
/* may be in the 40x25 mode... XXX */
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
/* get the BIOS video mode pointer */
p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x1d*4);
p = BIOS_SADDRTOLADDR(p);
video_mode_ptr2 = (u_char *)BIOS_PADDRTOVADDR(p);
#endif
break;
case KD_MONO:
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
/* get the BIOS video mode pointer */
p = *(u_int32_t *)BIOS_PADDRTOVADDR(0x1d*4);
p = BIOS_SADDRTOLADDR(p);
video_mode_ptr2 = (u_char *)BIOS_PADDRTOVADDR(p);
#endif
break;
}
return 0;
}
static void
update_adapter_info(video_adapter_t *adp, video_info_t *info)
{
adp->va_flags &= ~V_ADP_COLOR;
adp->va_flags |=
(info->vi_flags & V_INFO_COLOR) ? V_ADP_COLOR : 0;
adp->va_crtc_addr =
(adp->va_flags & V_ADP_COLOR) ? COLOR_CRTC : MONO_CRTC;
adp->va_window = BIOS_PADDRTOVADDR(info->vi_window);
adp->va_window_size = info->vi_window_size;
adp->va_window_gran = info->vi_window_gran;
if (info->vi_buffer_size == 0) {
adp->va_buffer = 0;
adp->va_buffer_size = 0;
} else {
adp->va_buffer = BIOS_PADDRTOVADDR(info->vi_buffer);
adp->va_buffer_size = info->vi_buffer_size;
}
if (info->vi_flags & V_INFO_GRAPHICS) {
switch (info->vi_depth/info->vi_planes) {
case 1:
adp->va_line_width = info->vi_width/8;
break;
case 2:
adp->va_line_width = info->vi_width/4;
break;
case 4:
adp->va_line_width = info->vi_width/2;
break;
case 8:
default: /* shouldn't happen */
adp->va_line_width = info->vi_width;
break;
}
} else {
adp->va_line_width = info->vi_width;
}
bcopy(info, &adp->va_info, sizeof(adp->va_info));
}
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
/* compare two parameter table entries */
static int
comp_adpregs(u_char *buf1, u_char *buf2)
{
static struct {
u_char mask;
} params[V_MODE_PARAM_SIZE] = {
0xff, 0x00, 0xff, /* COLS, ROWS, POINTS */
0x00, 0x00, /* page length */
0xfe, 0xff, 0xff, 0xff, /* sequencer registers */
0xf3, /* misc register */
0xff, 0xff, 0xff, 0x7f, 0xff, /* CRTC */
0xff, 0xff, 0xff, 0x7f, 0xff,
0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xff, 0x7f, 0xff, 0xff,
0x7f, 0xff, 0xff, 0xef, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, /* attribute controller registers */
0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xff, 0xff, 0xff, 0xff, /* GDC register */
0xff, 0xff, 0xff, 0xff,
};
int identical = TRUE;
int i;
if ((buf1 == NULL) || (buf2 == NULL))
return COMP_DIFFERENT;
for (i = 0; i < sizeof(params)/sizeof(params[0]); ++i) {
if (params[i].mask == 0) /* don't care */
continue;
if ((buf1[i] & params[i].mask) != (buf2[i] & params[i].mask))
return COMP_DIFFERENT;
if (buf1[i] != buf2[i])
identical = FALSE;
}
return (identical) ? COMP_IDENTICAL : COMP_SIMILAR;
}
#endif /* !VGA_NO_BIOS && !VGA_NO_MODE_CHANGE */
/* probe video adapters and return the number of detected adapters */
static int
probe_adapters(void)
{
video_adapter_t *adp;
video_info_t info;
u_char *mp;
int i;
/* do this test only once */
if (init_done)
return biosadapters;
init_done = TRUE;
/*
* Locate display adapters.
* The AT architecture supports upto two adapters. `syscons' allows
* the following combinations of adapters:
* 1) MDA + CGA
* 2) MDA + EGA/VGA color
* 3) CGA + EGA/VGA mono
* Note that `syscons' doesn't bother with MCGA as it is only
* avaiable for low end PS/2 models which has 80286 or earlier CPUs,
* thus, they are not running FreeBSD!
* When there are two adapaters in the system, one becomes `primary'
* and the other `secondary'. The EGA adapter has a set of DIP
* switches on board for this information and the EGA BIOS copies
* it in the BIOS data area BIOSDATA_VIDEOSWITCH (40:88).
* The VGA BIOS has more sophisticated mechanism and has this
* information in BIOSDATA_DCCINDEX (40:8a), but it also maintains
* compatibility with the EGA BIOS by updating BIOSDATA_VIDEOSWITCH.
*/
/*
* Check rtc and BIOS data area.
* XXX: we don't use BIOSDATA_EQUIPMENT, since it is not a dead
* copy of RTC_EQUIPMENT. Bits 4 and 5 of ETC_EQUIPMENT are
* zeros for EGA and VGA. However, the EGA/VGA BIOS sets
* these bits in BIOSDATA_EQUIPMENT according to the monitor
* type detected.
*/
#ifndef VGA_NO_BIOS
switch ((rtcin(RTC_EQUIPMENT) >> 4) & 3) { /* bit 4 and 5 */
case 0:
/* EGA/VGA */
fill_adapter_param(readb(BIOS_PADDRTOVADDR(0x488)) & 0x0f,
biosadapter);
break;
case 1:
/* CGA 40x25 */
/* FIXME: switch to the 80x25 mode? XXX */
biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_CGA40];
biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
break;
case 2:
/* CGA 80x25 */
biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_CGA80];
biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
break;
case 3:
/* MDA */
biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_MONO];
biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_CGA80];
break;
}
#else
/* assume EGA/VGA? XXX */
biosadapter[V_ADP_PRIMARY] = adapter_init_value[DCC_EGA80];
biosadapter[V_ADP_SECONDARY] = adapter_init_value[DCC_MONO];
#endif /* VGA_NO_BIOS */
biosadapters = 0;
if (verify_adapter(&biosadapter[V_ADP_SECONDARY]) == 0) {
++biosadapters;
biosadapter[V_ADP_SECONDARY].va_flags |= V_ADP_PROBED;
biosadapter[V_ADP_SECONDARY].va_mode =
biosadapter[V_ADP_SECONDARY].va_initial_mode =
map_bios_mode_num(biosadapter[V_ADP_SECONDARY].va_type,
biosadapter[V_ADP_SECONDARY].va_flags
& V_ADP_COLOR,
biosadapter[V_ADP_SECONDARY].va_initial_bios_mode);
} else {
biosadapter[V_ADP_SECONDARY].va_type = -1;
}
if (verify_adapter(&biosadapter[V_ADP_PRIMARY]) == 0) {
++biosadapters;
biosadapter[V_ADP_PRIMARY].va_flags |= V_ADP_PROBED;
#ifndef VGA_NO_BIOS
biosadapter[V_ADP_PRIMARY].va_initial_bios_mode =
readb(BIOS_PADDRTOVADDR(0x449));
#else
biosadapter[V_ADP_PRIMARY].va_initial_bios_mode = 3; /* XXX */
#endif
biosadapter[V_ADP_PRIMARY].va_mode =
biosadapter[V_ADP_PRIMARY].va_initial_mode =
map_bios_mode_num(biosadapter[V_ADP_PRIMARY].va_type,
biosadapter[V_ADP_PRIMARY].va_flags & V_ADP_COLOR,
biosadapter[V_ADP_PRIMARY].va_initial_bios_mode);
} else {
biosadapter[V_ADP_PRIMARY] = biosadapter[V_ADP_SECONDARY];
biosadapter[V_ADP_SECONDARY].va_type = -1;
}
if (biosadapters == 0)
return biosadapters;
biosadapter[V_ADP_PRIMARY].va_unit = V_ADP_PRIMARY;
biosadapter[V_ADP_SECONDARY].va_unit = V_ADP_SECONDARY;
#if 0 /* we don't need these... */
fb_init_struct(&biosadapter[V_ADP_PRIMARY], ...);
fb_init_struct(&biosadapter[V_ADP_SECONDARY], ...);
#endif
#if 0
/*
* We cannot have two video adapter of the same type; there must be
* only one of color or mono adapter, or one each of them.
*/
if (biosadapters > 1) {
if (!((biosadapter[0].va_flags ^ biosadapter[1].va_flags)
& V_ADP_COLOR))
/* we have two mono or color adapters!! */
return (biosadapters = 0);
}
#endif
/*
* Ensure a zero start address. This is mainly to recover after
* switching from pcvt using userconfig(). The registers are w/o
* for old hardware so it's too hard to relocate the active screen
* memory.
* This must be done before vga_save_state() for VGA.
*/
outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr, 12);
outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr + 1, 0);
outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr, 13);
outb(biosadapter[V_ADP_PRIMARY].va_crtc_addr + 1, 0);
/* the video mode parameter table in EGA/VGA BIOS */
/* NOTE: there can be only one EGA/VGA, wheather color or mono,
* recognized by the video BIOS.
*/
if ((biosadapter[V_ADP_PRIMARY].va_type == KD_EGA) ||
(biosadapter[V_ADP_PRIMARY].va_type == KD_VGA)) {
adp = &biosadapter[V_ADP_PRIMARY];
} else if ((biosadapter[V_ADP_SECONDARY].va_type == KD_EGA) ||
(biosadapter[V_ADP_SECONDARY].va_type == KD_VGA)) {
adp = &biosadapter[V_ADP_SECONDARY];
} else {
adp = NULL;
}
bzero(mode_map, sizeof(mode_map));
if (adp != NULL) {
if (adp->va_type == KD_VGA) {
vga_save_state(adp, &adpstate, sizeof(adpstate));
#if defined(VGA_NO_BIOS) || defined(VGA_NO_MODE_CHANGE)
mode_map[adp->va_initial_mode] = adpstate.regs;
rows_offset = 1;
#else /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
if (video_mode_ptr == NULL) {
mode_map[adp->va_initial_mode] = adpstate.regs;
rows_offset = 1;
} else {
/* discard the table if we are not familiar with it... */
map_mode_table(mode_map, video_mode_ptr, M_VGA_CG320 + 1);
mp = get_mode_param(adp->va_initial_mode);
if (mp != NULL)
bcopy(mp, adpstate2.regs, sizeof(adpstate2.regs));
switch (comp_adpregs(adpstate.regs, mp)) {
case COMP_IDENTICAL:
/*
* OK, this parameter table looks reasonably familiar
* to us...
*/
/*
* This is a kludge for Toshiba DynaBook SS433
* whose BIOS video mode table entry has the actual #
* of rows at the offset 1; BIOSes from other
* manufacturers store the # of rows - 1 there. XXX
*/
rows_offset = adpstate.regs[1] + 1 - mp[1];
break;
case COMP_SIMILAR:
/*
* Not exactly the same, but similar enough to be
* trusted. However, use the saved register values
* for the initial mode and other modes which are
* based on the initial mode.
*/
mode_map[adp->va_initial_mode] = adpstate.regs;
rows_offset = adpstate.regs[1] + 1 - mp[1];
adpstate.regs[1] -= rows_offset - 1;
break;
case COMP_DIFFERENT:
default:
/*
* Don't use the paramter table in BIOS. It doesn't
* look familiar to us. Video mode switching is allowed
* only if the new mode is the same as or based on
* the initial mode.
*/
video_mode_ptr = NULL;
bzero(mode_map, sizeof(mode_map));
mode_map[adp->va_initial_mode] = adpstate.regs;
rows_offset = 1;
break;
}
}
#endif /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
#ifndef VGA_NO_MODE_CHANGE
adp->va_flags |= V_ADP_MODECHANGE;
#endif
#ifndef VGA_NO_FONT_LOADING
adp->va_flags |= V_ADP_FONT;
#endif
} else if (adp->va_type == KD_EGA) {
#if defined(VGA_NO_BIOS) || defined(VGA_NO_MODE_CHANGE)
rows_offset = 1;
#else /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
if (video_mode_ptr == NULL) {
rows_offset = 1;
} else {
map_mode_table(mode_map, video_mode_ptr, M_ENH_C80x25 + 1);
/* XXX how can one validate the EGA table... */
mp = get_mode_param(adp->va_initial_mode);
if (mp != NULL) {
adp->va_flags |= V_ADP_MODECHANGE;
#ifndef VGA_NO_FONT_LOADING
adp->va_flags |= V_ADP_FONT;
#endif
rows_offset = 1;
} else {
/*
* This is serious. We will not be able to switch video
* modes at all...
*/
video_mode_ptr = NULL;
bzero(mode_map, sizeof(mode_map));
rows_offset = 1;
}
}
#endif /* VGA_NO_BIOS || VGA_NO_MODE_CHANGE */
}
}
/* remove conflicting modes if we have more than one adapter */
if (biosadapters > 1) {
for (i = 0; i < biosadapters; ++i) {
if (!(biosadapter[i].va_flags & V_ADP_MODECHANGE))
continue;
clear_mode_map(&biosadapter[i], mode_map, M_VGA_CG320 + 1,
(biosadapter[i].va_flags & V_ADP_COLOR) ?
V_INFO_COLOR : 0);
if ((biosadapter[i].va_type == KD_VGA)
|| (biosadapter[i].va_type == KD_EGA)) {
biosadapter[i].va_io_base =
(biosadapter[i].va_flags & V_ADP_COLOR) ?
IO_VGA : IO_MDA;
biosadapter[i].va_io_size = 32;
}
}
}
/* buffer address */
vga_get_info(&biosadapter[V_ADP_PRIMARY],
biosadapter[V_ADP_PRIMARY].va_initial_mode, &info);
update_adapter_info(&biosadapter[V_ADP_PRIMARY], &info);
if (biosadapters > 1) {
vga_get_info(&biosadapter[V_ADP_SECONDARY],
biosadapter[V_ADP_SECONDARY].va_initial_mode, &info);
update_adapter_info(&biosadapter[V_ADP_SECONDARY], &info);
}
/*
* XXX: we should verify the following values for the primary adapter...
* crtc I/O port address: *(u_int16_t *)BIOS_PADDRTOVADDR(0x463);
* color/mono display: (*(u_int8_t *)BIOS_PADDRTOVADDR(0x487) & 0x02)
* ? 0 : V_ADP_COLOR;
* columns: *(u_int8_t *)BIOS_PADDRTOVADDR(0x44a);
* rows: *(u_int8_t *)BIOS_PADDRTOVADDR(0x484);
* font size: *(u_int8_t *)BIOS_PADDRTOVADDR(0x485);
* buffer size: *(u_int16_t *)BIOS_PADDRTOVADDR(0x44c);
*/
return biosadapters;
}
/* entry points */
static int
vga_nop(void)
{
return 0;
}
static int
vga_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
{
probe_adapters();
if (unit >= biosadapters)
return ENXIO;
*adpp = &biosadapter[unit];
return 0;
}
static int
vga_init(int unit, video_adapter_t *adp, int flags)
{
if ((unit >= biosadapters) || (adp == NULL) || !probe_done(adp))
return ENXIO;
if (!init_done(adp)) {
/* nothing to do really... */
adp->va_flags |= V_ADP_INITIALIZED;
}
if (!config_done(adp)) {
if (vid_register(adp) < 0)
return ENXIO;
adp->va_flags |= V_ADP_REGISTERED;
}
if (vga_sub_configure != NULL)
(*vga_sub_configure)(0);
return 0;
}
/*
* get_info():
* Return the video_info structure of the requested video mode.
*
* all adapters
*/
static int
vga_get_info(video_adapter_t *adp, int mode, video_info_t *info)
{
int i;
if (!init_done)
return 1;
mode = map_gen_mode_num(adp->va_type, adp->va_flags & V_ADP_COLOR, mode);
#ifndef VGA_NO_MODE_CHANGE
if (adp->va_flags & V_ADP_MODECHANGE) {
/*
* If the parameter table entry for this mode is not found,
* the mode is not supported...
*/
if (get_mode_param(mode) == NULL)
return 1;
} else
#endif /* VGA_NO_MODE_CHANGE */
{
/*
* Even if we don't support video mode switching on this adapter,
* the information on the initial (thus current) video mode
* should be made available.
*/
if (mode != adp->va_initial_mode)
return 1;
}
for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
if (bios_vmode[i].vi_mode == NA)
continue;
if (mode == bios_vmode[i].vi_mode) {
*info = bios_vmode[i];
return 0;
}
}
return 1;
}
/*
* query_mode():
* Find a video mode matching the requested parameters.
* Fields filled with 0 are considered "don't care" fields and
* match any modes.
*
* all adapters
*/
static int
vga_query_mode(video_adapter_t *adp, video_info_t *info)
{
video_info_t buf;
int i;
if (!init_done)
return -1;
for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
if (bios_vmode[i].vi_mode == NA)
continue;
if ((info->vi_width != 0)
&& (info->vi_width != bios_vmode[i].vi_width))
continue;
if ((info->vi_height != 0)
&& (info->vi_height != bios_vmode[i].vi_height))
continue;
if ((info->vi_cwidth != 0)
&& (info->vi_cwidth != bios_vmode[i].vi_cwidth))
continue;
if ((info->vi_cheight != 0)
&& (info->vi_cheight != bios_vmode[i].vi_cheight))
continue;
if ((info->vi_depth != 0)
&& (info->vi_depth != bios_vmode[i].vi_depth))
continue;
if ((info->vi_planes != 0)
&& (info->vi_planes != bios_vmode[i].vi_planes))
continue;
/* XXX: should check pixel format, memory model */
if ((info->vi_flags != 0)
&& (info->vi_flags != bios_vmode[i].vi_flags))
continue;
/* verify if this mode is supported on this adapter */
if (vga_get_info(adp, bios_vmode[i].vi_mode, &buf))
continue;
return bios_vmode[i].vi_mode;
}
return -1;
}
/*
* set_mode():
* Change the video mode.
*
* EGA/VGA
*/
static int
vga_set_mode(video_adapter_t *adp, int mode)
{
#ifndef VGA_NO_MODE_CHANGE
video_info_t info;
adp_state_t params;
prologue(adp, V_ADP_MODECHANGE, 1);
mode = map_gen_mode_num(adp->va_type,
adp->va_flags & V_ADP_COLOR, mode);
if (vga_get_info(adp, mode, &info))
return 1;
params.sig = V_STATE_SIG;
bcopy(get_mode_param(mode), params.regs, sizeof(params.regs));
switch (mode) {
case M_VGA_C80x60: case M_VGA_M80x60:
params.regs[2] = 0x08;
params.regs[19] = 0x47;
goto special_480l;
case M_VGA_C80x30: case M_VGA_M80x30:
params.regs[19] = 0x4f;
special_480l:
params.regs[9] |= 0xc0;
params.regs[16] = 0x08;
params.regs[17] = 0x3e;
params.regs[26] = 0xea;
params.regs[28] = 0xdf;
params.regs[31] = 0xe7;
params.regs[32] = 0x04;
goto setup_mode;
case M_ENH_C80x43: case M_ENH_B80x43:
params.regs[28] = 87;
goto special_80x50;
case M_VGA_C80x50: case M_VGA_M80x50:
special_80x50:
params.regs[2] = 8;
params.regs[19] = 7;
goto setup_mode;
case M_VGA_C40x25: case M_VGA_C80x25:
case M_VGA_M80x25:
case M_B40x25: case M_C40x25:
case M_B80x25: case M_C80x25:
case M_ENH_B40x25: case M_ENH_C40x25:
case M_ENH_B80x25: case M_ENH_C80x25:
case M_EGAMONO80x25:
setup_mode:
vga_load_state(adp, &params);
break;
case M_VGA_MODEX:
/* "unchain" the VGA mode */
params.regs[5-1+0x04] &= 0xf7;
params.regs[5-1+0x04] |= 0x04;
/* turn off doubleword mode */
params.regs[10+0x14] &= 0xbf;
/* turn off word adressing */
params.regs[10+0x17] |= 0x40;
/* set logical screen width */
params.regs[10+0x13] = 80;
/* set 240 lines */
params.regs[10+0x11] = 0x2c;
params.regs[10+0x06] = 0x0d;
params.regs[10+0x07] = 0x3e;
params.regs[10+0x10] = 0xea;
params.regs[10+0x11] = 0xac;
params.regs[10+0x12] = 0xdf;
params.regs[10+0x15] = 0xe7;
params.regs[10+0x16] = 0x06;
/* set vertical sync polarity to reflect aspect ratio */
params.regs[9] = 0xe3;
goto setup_grmode;
case M_BG320: case M_CG320: case M_BG640:
case M_CG320_D: case M_CG640_E:
case M_CG640x350: case M_ENH_CG640:
case M_BG640x480: case M_CG640x480: case M_VGA_CG320:
setup_grmode:
vga_load_state(adp, &params);
break;
default:
return 1;
}
adp->va_mode = mode;
update_adapter_info(adp, &info);
/* move hardware cursor out of the way */
(*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
return 0;
#else /* VGA_NO_MODE_CHANGE */
return 1;
#endif /* VGA_NO_MODE_CHANGE */
}
#ifndef VGA_NO_FONT_LOADING
static void
set_font_mode(video_adapter_t *adp, u_char *buf)
{
u_char *mp;
int s;
s = splhigh();
/* save register values */
if (adp->va_type == KD_VGA) {
outb(TSIDX, 0x02); buf[0] = inb(TSREG);
outb(TSIDX, 0x04); buf[1] = inb(TSREG);
outb(GDCIDX, 0x04); buf[2] = inb(GDCREG);
outb(GDCIDX, 0x05); buf[3] = inb(GDCREG);
outb(GDCIDX, 0x06); buf[4] = inb(GDCREG);
inb(adp->va_crtc_addr + 6);
outb(ATC, 0x10); buf[5] = inb(ATC + 1);
} else /* if (adp->va_type == KD_EGA) */ {
/*
* EGA cannot be read; copy parameters from the mode parameter
* table.
*/
mp = get_mode_param(adp->va_mode);
buf[0] = mp[5 + 0x02 - 1];
buf[1] = mp[5 + 0x04 - 1];
buf[2] = mp[55 + 0x04];
buf[3] = mp[55 + 0x05];
buf[4] = mp[55 + 0x06];
buf[5] = mp[35 + 0x10];
}
/* setup vga for loading fonts */
inb(adp->va_crtc_addr + 6); /* reset flip-flop */
outb(ATC, 0x10); outb(ATC, buf[5] & ~0x01);
inb(adp->va_crtc_addr + 6); /* reset flip-flop */
outb(ATC, 0x20); /* enable palette */
#if VGA_SLOW_IOACCESS
#ifdef VGA_ALT_SEQACCESS
outb(TSIDX, 0x00); outb(TSREG, 0x01);
#endif
outb(TSIDX, 0x02); outb(TSREG, 0x04);
outb(TSIDX, 0x04); outb(TSREG, 0x07);
#ifdef VGA_ALT_SEQACCESS
outb(TSIDX, 0x00); outb(TSREG, 0x03);
#endif
outb(GDCIDX, 0x04); outb(GDCREG, 0x02);
outb(GDCIDX, 0x05); outb(GDCREG, 0x00);
outb(GDCIDX, 0x06); outb(GDCREG, 0x04);
#else /* VGA_SLOW_IOACCESS */
#ifdef VGA_ALT_SEQACCESS
outw(TSIDX, 0x0100);
#endif
outw(TSIDX, 0x0402);
outw(TSIDX, 0x0704);
#ifdef VGA_ALT_SEQACCESS
outw(TSIDX, 0x0300);
#endif
outw(GDCIDX, 0x0204);
outw(GDCIDX, 0x0005);
outw(GDCIDX, 0x0406); /* addr = a0000, 64kb */
#endif /* VGA_SLOW_IOACCESS */
splx(s);
}
static void
set_normal_mode(video_adapter_t *adp, u_char *buf)
{
int s;
s = splhigh();
/* setup vga for normal operation mode again */
inb(adp->va_crtc_addr + 6); /* reset flip-flop */
outb(ATC, 0x10); outb(ATC, buf[5]);
inb(adp->va_crtc_addr + 6); /* reset flip-flop */
outb(ATC, 0x20); /* enable palette */
#if VGA_SLOW_IOACCESS
#ifdef VGA_ALT_SEQACCESS
outb(TSIDX, 0x00); outb(TSREG, 0x01);
#endif
outb(TSIDX, 0x02); outb(TSREG, buf[0]);
outb(TSIDX, 0x04); outb(TSREG, buf[1]);
#ifdef VGA_ALT_SEQACCESS
outb(TSIDX, 0x00); outb(TSREG, 0x03);
#endif
outb(GDCIDX, 0x04); outb(GDCREG, buf[2]);
outb(GDCIDX, 0x05); outb(GDCREG, buf[3]);
if (adp->va_crtc_addr == MONO_CRTC) {
outb(GDCIDX, 0x06); outb(GDCREG,(buf[4] & 0x03) | 0x08);
} else {
outb(GDCIDX, 0x06); outb(GDCREG,(buf[4] & 0x03) | 0x0c);
}
#else /* VGA_SLOW_IOACCESS */
#ifdef VGA_ALT_SEQACCESS
outw(TSIDX, 0x0100);
#endif
outw(TSIDX, 0x0002 | (buf[0] << 8));
outw(TSIDX, 0x0004 | (buf[1] << 8));
#ifdef VGA_ALT_SEQACCESS
outw(TSIDX, 0x0300);
#endif
outw(GDCIDX, 0x0004 | (buf[2] << 8));
outw(GDCIDX, 0x0005 | (buf[3] << 8));
if (adp->va_crtc_addr == MONO_CRTC)
outw(GDCIDX, 0x0006 | (((buf[4] & 0x03) | 0x08)<<8));
else
outw(GDCIDX, 0x0006 | (((buf[4] & 0x03) | 0x0c)<<8));
#endif /* VGA_SLOW_IOACCESS */
splx(s);
}
#endif /* VGA_NO_FONT_LOADING */
/*
* save_font():
* Read the font data in the requested font page from the video adapter.
*
* EGA/VGA
*/
static int
vga_save_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
int ch, int count)
{
#ifndef VGA_NO_FONT_LOADING
u_char buf[PARAM_BUFSIZE];
u_int32_t segment;
int c;
#ifdef VGA_ALT_SEQACCESS
int s;
u_char val = 0;
#endif
prologue(adp, V_ADP_FONT, 1);
if (fontsize < 14) {
/* FONT_8 */
fontsize = 8;
} else if (fontsize >= 32) {
fontsize = 32;
} else if (fontsize >= 16) {
/* FONT_16 */
fontsize = 16;
} else {
/* FONT_14 */
fontsize = 14;
}
if (page < 0 || page >= 8)
return 1;
segment = FONT_BUF + 0x4000*page;
if (page > 3)
segment -= 0xe000;
#ifdef VGA_ALT_SEQACCESS
if (adp->va_type == KD_VGA) { /* what about EGA? XXX */
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01);
outb(TSIDX, 0x01); val = inb(TSREG); /* disable screen */
outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
outb(TSIDX, 0x00); outb(TSREG, 0x03);
splx(s);
}
#endif
set_font_mode(adp, buf);
if (fontsize == 32) {
bcopy_fromio((void *)(segment + ch*32), data, fontsize*count);
} else {
for (c = ch; count > 0; ++c, --count) {
bcopy_fromio((void *)(segment + c*32), data, fontsize);
data += fontsize;
}
}
set_normal_mode(adp, buf);
#ifdef VGA_ALT_SEQACCESS
if (adp->va_type == KD_VGA) {
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01);
outb(TSIDX, 0x01); outb(TSREG, val & 0xdf); /* enable screen */
outb(TSIDX, 0x00); outb(TSREG, 0x03);
splx(s);
}
#endif
return 0;
#else /* VGA_NO_FONT_LOADING */
return 1;
#endif /* VGA_NO_FONT_LOADING */
}
/*
* load_font():
* Set the font data in the requested font page.
* NOTE: it appears that some recent video adapters do not support
* the font page other than 0... XXX
*
* EGA/VGA
*/
static int
vga_load_font(video_adapter_t *adp, int page, int fontsize, u_char *data,
int ch, int count)
{
#ifndef VGA_NO_FONT_LOADING
u_char buf[PARAM_BUFSIZE];
u_int32_t segment;
int c;
#ifdef VGA_ALT_SEQACCESS
int s;
u_char val = 0;
#endif
prologue(adp, V_ADP_FONT, 1);
if (fontsize < 14) {
/* FONT_8 */
fontsize = 8;
} else if (fontsize >= 32) {
fontsize = 32;
} else if (fontsize >= 16) {
/* FONT_16 */
fontsize = 16;
} else {
/* FONT_14 */
fontsize = 14;
}
if (page < 0 || page >= 8)
return 1;
segment = FONT_BUF + 0x4000*page;
if (page > 3)
segment -= 0xe000;
#ifdef VGA_ALT_SEQACCESS
if (adp->va_type == KD_VGA) { /* what about EGA? XXX */
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01);
outb(TSIDX, 0x01); val = inb(TSREG); /* disable screen */
outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
outb(TSIDX, 0x00); outb(TSREG, 0x03);
splx(s);
}
#endif
set_font_mode(adp, buf);
if (fontsize == 32) {
bcopy_toio(data, (void *)(segment + ch*32), fontsize*count);
} else {
for (c = ch; count > 0; ++c, --count) {
bcopy_toio(data, (void *)(segment + c*32), fontsize);
data += fontsize;
}
}
set_normal_mode(adp, buf);
#ifdef VGA_ALT_SEQACCESS
if (adp->va_type == KD_VGA) {
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01);
outb(TSIDX, 0x01); outb(TSREG, val & 0xdf); /* enable screen */
outb(TSIDX, 0x00); outb(TSREG, 0x03);
splx(s);
}
#endif
return 0;
#else /* VGA_NO_FONT_LOADING */
return 1;
#endif /* VGA_NO_FONT_LOADING */
}
/*
* show_font():
* Activate the requested font page.
* NOTE: it appears that some recent video adapters do not support
* the font page other than 0... XXX
*
* EGA/VGA
*/
static int
vga_show_font(video_adapter_t *adp, int page)
{
#ifndef VGA_NO_FONT_LOADING
static u_char cg[] = { 0x00, 0x05, 0x0a, 0x0f, 0x30, 0x35, 0x3a, 0x3f };
int s;
prologue(adp, V_ADP_FONT, 1);
if (page < 0 || page >= 8)
return 1;
s = splhigh();
outb(TSIDX, 0x03); outb(TSREG, cg[page]);
splx(s);
return 0;
#else /* VGA_NO_FONT_LOADING */
return 1;
#endif /* VGA_NO_FONT_LOADING */
}
/*
* save_palette():
* Read DAC values. The values have expressed in 8 bits.
*
* VGA
*/
static int
vga_save_palette(video_adapter_t *adp, u_char *palette)
{
int i;
prologue(adp, V_ADP_PALETTE, 1);
/*
* We store 8 bit values in the palette buffer, while the standard
* VGA has 6 bit DAC .
*/
outb(PALRADR, 0x00);
for (i = 0; i < 256*3; ++i)
palette[i] = inb(PALDATA) << 2;
inb(adp->va_crtc_addr + 6); /* reset flip/flop */
return 0;
}
/*
* load_palette():
* Set DAC values.
*
* VGA
*/
static int
vga_load_palette(video_adapter_t *adp, u_char *palette)
{
int i;
prologue(adp, V_ADP_PALETTE, 1);
outb(PIXMASK, 0xff); /* no pixelmask */
outb(PALWADR, 0x00);
for (i = 0; i < 256*3; ++i)
outb(PALDATA, palette[i] >> 2);
inb(adp->va_crtc_addr + 6); /* reset flip/flop */
outb(ATC, 0x20); /* enable palette */
return 0;
}
/*
* set_border():
* Change the border color.
*
* CGA/EGA/VGA
*/
static int
vga_set_border(video_adapter_t *adp, int color)
{
prologue(adp, V_ADP_BORDER, 1);
switch (adp->va_type) {
case KD_EGA:
case KD_VGA:
inb(adp->va_crtc_addr + 6); /* reset flip-flop */
outb(ATC, 0x31); outb(ATC, color & 0xff);
break;
case KD_CGA:
outb(adp->va_crtc_addr + 5, color & 0x0f); /* color select register */
break;
case KD_MONO:
case KD_HERCULES:
default:
break;
}
return 0;
}
/*
* save_state():
* Read video register values.
* NOTE: this function only reads the standard EGA/VGA registers.
* any extra/extended registers of SVGA adapters are not saved.
*
* VGA
*/
static int
vga_save_state(video_adapter_t *adp, void *p, size_t size)
{
video_info_t info;
u_char *buf;
int crtc_addr;
int i, j;
int s;
if (size == 0) {
/* return the required buffer size */
prologue(adp, V_ADP_STATESAVE, 0);
return sizeof(adp_state_t);
} else {
prologue(adp, V_ADP_STATESAVE, 1);
if (size < sizeof(adp_state_t))
return 1;
}
((adp_state_t *)p)->sig = V_STATE_SIG;
buf = ((adp_state_t *)p)->regs;
bzero(buf, V_MODE_PARAM_SIZE);
crtc_addr = adp->va_crtc_addr;
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01); /* stop sequencer */
for (i = 0, j = 5; i < 4; i++) {
outb(TSIDX, i + 1);
buf[j++] = inb(TSREG);
}
buf[9] = inb(MISC + 10); /* dot-clock */
outb(TSIDX, 0x00); outb(TSREG, 0x03); /* start sequencer */
for (i = 0, j = 10; i < 25; i++) { /* crtc */
outb(crtc_addr, i);
buf[j++] = inb(crtc_addr + 1);
}
for (i = 0, j = 35; i < 20; i++) { /* attribute ctrl */
inb(crtc_addr + 6); /* reset flip-flop */
outb(ATC, i);
buf[j++] = inb(ATC + 1);
}
for (i = 0, j = 55; i < 9; i++) { /* graph data ctrl */
outb(GDCIDX, i);
buf[j++] = inb(GDCREG);
}
inb(crtc_addr + 6); /* reset flip-flop */
outb(ATC, 0x20); /* enable palette */
splx(s);
#if 1
if (vga_get_info(adp, adp->va_mode, &info) == 0) {
if (info.vi_flags & V_INFO_GRAPHICS) {
buf[0] = info.vi_width/info.vi_cwidth; /* COLS */
buf[1] = info.vi_height/info.vi_cheight - 1; /* ROWS */
} else {
buf[0] = info.vi_width; /* COLS */
buf[1] = info.vi_height - 1; /* ROWS */
}
buf[2] = info.vi_cheight; /* POINTS */
} else {
/* XXX: shouldn't be happening... */
printf("vga%d: %s: failed to obtain mode info. (vga_save_state())\n",
adp->va_unit, adp->va_name);
}
#else
buf[0] = readb(BIOS_PADDRTOVADDR(0x44a)); /* COLS */
buf[1] = readb(BIOS_PADDRTOVADDR(0x484)); /* ROWS */
buf[2] = readb(BIOS_PADDRTOVADDR(0x485)); /* POINTS */
buf[3] = readb(BIOS_PADDRTOVADDR(0x44c));
buf[4] = readb(BIOS_PADDRTOVADDR(0x44d));
#endif
return 0;
}
/*
* load_state():
* Set video registers at once.
* NOTE: this function only updates the standard EGA/VGA registers.
* any extra/extended registers of SVGA adapters are not changed.
*
* EGA/VGA
*/
static int
vga_load_state(video_adapter_t *adp, void *p)
{
u_char *buf;
int crtc_addr;
int s;
int i;
prologue(adp, V_ADP_STATELOAD, 1);
if (((adp_state_t *)p)->sig != V_STATE_SIG)
return 1;
buf = ((adp_state_t *)p)->regs;
crtc_addr = adp->va_crtc_addr;
s = splhigh();
outb(TSIDX, 0x00); outb(TSREG, 0x01); /* stop sequencer */
for (i = 0; i < 4; ++i) { /* program sequencer */
outb(TSIDX, i + 1);
outb(TSREG, buf[i + 5]);
}
outb(MISC, buf[9]); /* set dot-clock */
outb(TSIDX, 0x00); outb(TSREG, 0x03); /* start sequencer */
outb(crtc_addr, 0x11);
outb(crtc_addr + 1, inb(crtc_addr + 1) & 0x7F);
for (i = 0; i < 25; ++i) { /* program crtc */
outb(crtc_addr, i);
outb(crtc_addr + 1, buf[i + 10]);
}
inb(crtc_addr+6); /* reset flip-flop */
for (i = 0; i < 20; ++i) { /* program attribute ctrl */
outb(ATC, i);
outb(ATC, buf[i + 35]);
}
for (i = 0; i < 9; ++i) { /* program graph data ctrl */
outb(GDCIDX, i);
outb(GDCREG, buf[i + 55]);
}
inb(crtc_addr + 6); /* reset flip-flop */
outb(ATC, 0x20); /* enable palette */
#if notyet /* a temporary workaround for kernel panic, XXX */
#ifndef VGA_NO_BIOS
if (adp->va_unit == V_ADP_PRIMARY) {
writeb(BIOS_PADDRTOVADDR(0x44a), buf[0]); /* COLS */
writeb(BIOS_PADDRTOVADDR(0x484), buf[1] + rows_offset - 1); /* ROWS */
writeb(BIOS_PADDRTOVADDR(0x485), buf[2]); /* POINTS */
#if 0
writeb(BIOS_PADDRTOVADDR(0x44c), buf[3]);
writeb(BIOS_PADDRTOVADDR(0x44d), buf[4]);
#endif
}
#endif /* VGA_NO_BIOS */
#endif /* notyet */
splx(s);
return 0;
}
/*
* set_origin():
* Change the origin (window mapping) of the banked frame buffer.
*/
static int
vga_set_origin(video_adapter_t *adp, off_t offset)
{
/*
* The standard video modes do not require window mapping;
* always return error.
*/
return 1;
}
/*
* read_hw_cursor():
* Read the position of the hardware text cursor.
*
* all adapters
*/
static int
vga_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
{
u_int16_t off;
int s;
if (!init_done)
return 1;
if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
return 1;
s = spltty();
outb(adp->va_crtc_addr, 14);
off = inb(adp->va_crtc_addr + 1);
outb(adp->va_crtc_addr, 15);
off = (off << 8) | inb(adp->va_crtc_addr + 1);
splx(s);
*row = off / adp->va_info.vi_width;
*col = off % adp->va_info.vi_width;
return 0;
}
/*
* set_hw_cursor():
* Move the hardware text cursor. If col and row are both -1,
* the cursor won't be shown.
*
* all adapters
*/
static int
vga_set_hw_cursor(video_adapter_t *adp, int col, int row)
{
u_int16_t off;
int s;
if (!init_done)
return 1;
if ((col == -1) && (row == -1)) {
off = -1;
} else {
if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
return 1;
off = row*adp->va_info.vi_width + col;
}
s = spltty();
outb(adp->va_crtc_addr, 14);
outb(adp->va_crtc_addr + 1, off >> 8);
outb(adp->va_crtc_addr, 15);
outb(adp->va_crtc_addr + 1, off & 0x00ff);
splx(s);
return 0;
}
/*
* set_hw_cursor_shape():
* Change the shape of the hardware text cursor. If the height is
* zero or negative, the cursor won't be shown.
*
* all adapters
*/
static int
vga_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
int celsize, int blink)
{
int s;
if (!init_done)
return 1;
s = spltty();
switch (adp->va_type) {
case KD_VGA:
case KD_CGA:
case KD_MONO:
case KD_HERCULES:
default:
if (height <= 0) {
/* make the cursor invisible */
outb(adp->va_crtc_addr, 10);
outb(adp->va_crtc_addr + 1, 32);
outb(adp->va_crtc_addr, 11);
outb(adp->va_crtc_addr + 1, 0);
} else {
outb(adp->va_crtc_addr, 10);
outb(adp->va_crtc_addr + 1, celsize - base - height);
outb(adp->va_crtc_addr, 11);
outb(adp->va_crtc_addr + 1, celsize - base - 1);
}
break;
case KD_EGA:
if (height <= 0) {
/* make the cursor invisible */
outb(adp->va_crtc_addr, 10);
outb(adp->va_crtc_addr + 1, celsize);
outb(adp->va_crtc_addr, 11);
outb(adp->va_crtc_addr + 1, 0);
} else {
outb(adp->va_crtc_addr, 10);
outb(adp->va_crtc_addr + 1, celsize - base - height);
outb(adp->va_crtc_addr, 11);
outb(adp->va_crtc_addr + 1, celsize - base);
}
break;
}
splx(s);
return 0;
}
/*
* mmap():
* Mmap frame buffer.
*
* all adapters
*/
static int
vga_mmap(video_adapter_t *adp, vm_offset_t offset)
{
if (offset > 0x20000 - PAGE_SIZE)
return -1;
#ifdef __i386__
return i386_btop((VIDEO_BUF_BASE + offset));
#endif
#ifdef __alpha__
return alpha_btop((VIDEO_BUF_BASE + offset));
#endif
}
static void
dump_buffer(u_char *buf, size_t len)
{
int i;
for(i = 0; i < len;) {
printf("%02x ", buf[i]);
if ((++i % 16) == 0)
printf("\n");
}
}
/*
* diag():
* Print some information about the video adapter and video modes,
* with requested level of details.
*
* all adapters
*/
static int
vga_diag(video_adapter_t *adp, int level)
{
#if FB_DEBUG > 1
video_info_t info;
#endif
u_char *mp;
if (!init_done)
return 1;
#if FB_DEBUG > 1
#ifndef VGA_NO_BIOS
printf("vga: RTC equip. code:0x%02x, DCC code:0x%02x\n",
rtcin(RTC_EQUIPMENT), readb(BIOS_PADDRTOVADDR(0x488)));
printf("vga: CRTC:0x%x, video option:0x%02x, ",
readw(BIOS_PADDRTOVADDR(0x463)),
readb(BIOS_PADDRTOVADDR(0x487)));
printf("rows:%d, cols:%d, font height:%d\n",
readb(BIOS_PADDRTOVADDR(0x44a)),
readb(BIOS_PADDRTOVADDR(0x484)) + 1,
readb(BIOS_PADDRTOVADDR(0x485)));
#endif /* VGA_NO_BIOS */
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
printf("vga: param table EGA/VGA:%p", video_mode_ptr);
printf(", CGA/MDA:%p\n", video_mode_ptr2);
#endif
printf("vga: rows_offset:%d\n", rows_offset);
#endif /* FB_DEBUG > 1 */
fb_dump_adp_info(DRIVER_NAME, adp, level);
#if FB_DEBUG > 1
if (adp->va_flags & V_ADP_MODECHANGE) {
for (i = 0; bios_vmode[i].vi_mode != EOT; ++i) {
if (bios_vmode[i].vi_mode == NA)
continue;
if (get_mode_param(bios_vmode[i].vi_mode) == NULL)
continue;
fb_dump_mode_info(DRIVER_NAME, adp, &bios_vmode[i], level);
}
} else {
vga_get_info(adp, adp->va_initial_mode, &info); /* shouldn't fail */
fb_dump_mode_info(DRIVER_NAME, adp, &info, level);
}
#endif /* FB_DEBUG > 1 */
if ((adp->va_type != KD_EGA) && (adp->va_type != KD_VGA))
return 0;
#if !defined(VGA_NO_BIOS) && !defined(VGA_NO_MODE_CHANGE)
if (video_mode_ptr == NULL)
printf("vga%d: %s: WARNING: video mode switching is not "
"fully supported on this adapter\n",
adp->va_unit, adp->va_name);
#endif
if (level <= 0)
return 0;
if (adp->va_type == KD_VGA) {
printf("VGA parameters upon power-up\n");
dump_buffer(adpstate.regs, sizeof(adpstate.regs));
printf("VGA parameters in BIOS for mode %d\n", adp->va_initial_mode);
dump_buffer(adpstate2.regs, sizeof(adpstate2.regs));
}
mp = get_mode_param(adp->va_initial_mode);
if (mp == NULL) /* this shouldn't be happening */
return 0;
printf("EGA/VGA parameters to be used for mode %d\n", adp->va_initial_mode);
dump_buffer(mp, V_MODE_PARAM_SIZE);
return 0;
}
#endif /* NVGA > 0 */
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