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NetBSD/sys/dev/ic/vga_raster.c

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/* $NetBSD: vga_raster.c,v 1.5 2002/11/28 07:02:20 junyoung Exp $ */
/*
* Copyright (c) 2001, 2002 Bang Jun-Young
* 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. 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 AUTHOR ``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 AUTHOR 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) 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/callout.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <machine/bus.h>
#include <dev/ic/mc6845reg.h>
#include <dev/ic/pcdisplayvar.h>
#include <dev/ic/vgareg.h>
#include <dev/ic/vgavar.h>
#include <dev/ic/videomode.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wsfont/wsfont.h>
#include <dev/ic/pcdisplay.h>
u_int8_t builtinfont_data[256 * 16];
struct wsdisplay_font builtinfont = {
"builtin", /* typeface name */
0, /* firstchar */
256, /* numchars */
WSDISPLAY_FONTENC_IBM, /* encoding */
8, /* width */
16, /* height */
1, /* stride */
WSDISPLAY_FONTORDER_L2R, /* bit order */
WSDISPLAY_FONTORDER_L2R, /* byte order */
builtinfont_data /* data */
};
struct vga_scrmem {
u_int16_t ch;
u_int8_t attr;
u_int8_t second; /* XXXBJY should be u_int8_t len; */
u_int8_t enc;
};
#ifdef VGA_CONSOLE_SCREENTYPE
#define VGA_SCRMEM_SIZE (80 * 30)
#else
#define VGA_SCRMEM_SIZE (80 * 25)
#endif
struct vga_scrmem boot_scrmem[VGA_SCRMEM_SIZE];
struct vga_raster_font {
LIST_ENTRY(vga_raster_font) next;
struct wsdisplay_font *font;
};
struct vgascreen {
LIST_ENTRY(vgascreen) next;
struct vga_config *cfg;
struct vga_handle *hdl;
const struct wsscreen_descr *type;
int active;
struct vga_scrmem *mem;
int encoding;
int dispoffset;
int mindispoffset;
int maxdispoffset;
int cursoron; /* Is cursor displayed? */
int cursorcol; /* Current cursor column */
int cursorrow; /* Current cursor row */
struct vga_scrmem cursortmp;
int cursorstride;
LIST_HEAD(, vga_raster_font) fontset;
};
struct vga_moderegs {
u_int8_t miscout; /* Misc. output */
u_int8_t crtc[VGA_CRTC_NREGS]; /* CRTC controller */
u_int8_t atc[VGA_ATC_NREGS]; /* Attribute controller */
u_int8_t ts[VGA_TS_NREGS]; /* Time sequencer */
u_int8_t gdc[VGA_GDC_NREGS]; /* Graphics display controller */
};
static int vgaconsole, vga_console_type, vga_console_attached;
static struct vgascreen vga_console_screen;
static struct vga_config vga_console_vc;
static struct vga_raster_font vga_console_fontset_ascii;
static struct videomode vga_console_modes[2] = {
/* 640x400 for 80x25, 80x40 and 80x50 modes */
{
25175, 640, 664, 760, 800, 400, 409, 411, 450, 0
},
/* 640x480 for 80x30 mode */
{
25175, 640, 664, 760, 800, 480, 491, 493, 525, 0
}
};
static void vga_raster_init(struct vga_config *, bus_space_tag_t,
bus_space_tag_t);
static void vga_raster_init_screen(struct vga_config *, struct vgascreen *,
const struct wsscreen_descr *, int, long *);
static void vga_raster_setup_font(struct vga_config *, struct vgascreen *);
static void vga_setup_regs(struct videomode *, struct vga_moderegs *);
static void vga_set_mode(struct vga_handle *, struct vga_moderegs *);
static void vga_restore_screen(struct vgascreen *,
const struct wsscreen_descr *, struct vga_scrmem *);
static void vga_raster_cursor_init(struct vgascreen *, int);
static void _vga_raster_putchar(void *, int, int, u_int, long,
struct vga_raster_font *);
static void vga_raster_cursor(void *, int, int, int);
static int vga_raster_mapchar(void *, int, u_int *);
static void vga_raster_putchar(void *, int, int, u_int, long);
static void vga_raster_copycols(void *, int, int, int, int);
static void vga_raster_erasecols(void *, int, int, int, long);
static void vga_raster_copyrows(void *, int, int, int);
static void vga_raster_eraserows(void *, int, int, long);
static int vga_raster_allocattr(void *, int, int, int, long *);
const struct wsdisplay_emulops vga_raster_emulops = {
vga_raster_cursor,
vga_raster_mapchar,
vga_raster_putchar,
vga_raster_copycols,
vga_raster_erasecols,
vga_raster_copyrows,
vga_raster_eraserows,
vga_raster_allocattr,
};
/*
* translate WS(=ANSI) color codes to standard pc ones
*/
static const unsigned char fgansitopc[] = {
#ifdef __alpha__
/*
* XXX DEC HAS SWITCHED THE CODES FOR BLUE AND RED!!!
* XXX We should probably not bother with this
* XXX (reinitialize the palette registers).
*/
FG_BLACK, FG_BLUE, FG_GREEN, FG_CYAN, FG_RED,
FG_MAGENTA, FG_BROWN, FG_LIGHTGREY
#else
FG_BLACK, FG_RED, FG_GREEN, FG_BROWN, FG_BLUE,
FG_MAGENTA, FG_CYAN, FG_LIGHTGREY
#endif
}, bgansitopc[] = {
#ifdef __alpha__
BG_BLACK, BG_BLUE, BG_GREEN, BG_CYAN, BG_RED,
BG_MAGENTA, BG_BROWN, BG_LIGHTGREY
#else
BG_BLACK, BG_RED, BG_GREEN, BG_BROWN, BG_BLUE,
BG_MAGENTA, BG_CYAN, BG_LIGHTGREY
#endif
};
const struct wsscreen_descr vga_25lscreen = {
"80x25", 80, 25,
&vga_raster_emulops,
8, 16,
WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_BLINK,
&vga_console_modes[0]
}, vga_25lscreen_mono = {
"80x25", 80, 25,
&vga_raster_emulops,
8, 16,
WSSCREEN_HILIT | WSSCREEN_UNDERLINE | WSSCREEN_BLINK | WSSCREEN_REVERSE,
&vga_console_modes[0]
}, vga_30lscreen = {
"80x30", 80, 30,
&vga_raster_emulops,
8, 16,
WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_BLINK,
&vga_console_modes[1]
}, vga_30lscreen_mono = {
"80x30", 80, 30,
&vga_raster_emulops,
8, 16,
WSSCREEN_HILIT | WSSCREEN_UNDERLINE | WSSCREEN_BLINK | WSSCREEN_REVERSE,
&vga_console_modes[1]
}, vga_40lscreen = {
"80x40", 80, 40,
&vga_raster_emulops,
8, 10,
WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_BLINK,
&vga_console_modes[0]
}, vga_40lscreen_mono = {
"80x40", 80, 40,
&vga_raster_emulops,
8, 10,
WSSCREEN_HILIT | WSSCREEN_UNDERLINE | WSSCREEN_BLINK | WSSCREEN_REVERSE,
&vga_console_modes[0]
}, vga_50lscreen = {
"80x50", 80, 50,
&vga_raster_emulops,
8, 8,
WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_BLINK,
&vga_console_modes[0]
}, vga_50lscreen_mono = {
"80x50", 80, 50,
&vga_raster_emulops,
8, 8,
WSSCREEN_HILIT | WSSCREEN_UNDERLINE | WSSCREEN_BLINK | WSSCREEN_REVERSE,
&vga_console_modes[0]
};
const struct wsscreen_descr *_vga_scrlist[] = {
&vga_25lscreen,
&vga_30lscreen,
&vga_40lscreen,
&vga_50lscreen,
}, *_vga_scrlist_mono[] = {
&vga_25lscreen_mono,
&vga_30lscreen_mono,
&vga_40lscreen_mono,
&vga_50lscreen_mono,
};
const struct wsscreen_list vga_screenlist = {
sizeof(_vga_scrlist) / sizeof(struct wsscreen_descr *),
_vga_scrlist
}, vga_screenlist_mono = {
sizeof(_vga_scrlist_mono) / sizeof(struct wsscreen_descr *),
_vga_scrlist_mono
};
static int vga_raster_ioctl(void *, u_long, caddr_t, int, struct proc *);
static paddr_t vga_raster_mmap(void *, off_t, int);
static int vga_raster_alloc_screen(void *, const struct wsscreen_descr *,
void **, int *, int *, long *);
static void vga_raster_free_screen(void *, void *);
static int vga_raster_show_screen(void *, void *, int,
void (*)(void *, int, int), void *);
static int vga_raster_load_font(void *, void *, struct wsdisplay_font *);
static void vga_switch_screen(struct vga_config *);
static void vga_raster_setscreentype(struct vga_config *,
const struct wsscreen_descr *);
const struct wsdisplay_accessops vga_raster_accessops = {
vga_raster_ioctl,
vga_raster_mmap,
vga_raster_alloc_screen,
vga_raster_free_screen,
vga_raster_show_screen,
vga_raster_load_font,
};
int
vga_cnattach(bus_space_tag_t iot, bus_space_tag_t memt, int type, int check)
{
long defattr;
const struct wsscreen_descr *scr;
#ifdef VGA_CONSOLE_SCREENTYPE
char *typestr;
#endif
if (check && !vga_common_probe(iot, memt))
return (ENXIO);
/* set up bus-independent VGA configuration */
vga_raster_init(&vga_console_vc, iot, memt);
#ifdef VGA_CONSOLE_SCREENTYPE
scr = wsdisplay_screentype_pick(vga_console_vc.hdl.vh_mono ?
&vga_screenlist_mono : &vga_screenlist, VGA_CONSOLE_SCREENTYPE);
if (!scr)
/* Invalid screen type, continue with the default mode. */
typestr = "80x25";
else if (scr->nrows > 30)
/* Unsupported screen type, try 80x30. */
typestr = "80x30";
scr = wsdisplay_screentype_pick(vga_console_vc.hdl.vh_mono ?
&vga_screenlist_mono : &vga_screenlist, typestr);
if (scr != vga_console_vc.currenttype)
vga_console_vc.currenttype = scr;
#else
scr = vga_console_vc.currenttype;
#endif
vga_raster_init_screen(&vga_console_vc, &vga_console_screen, scr, 1,
&defattr);
vga_console_screen.active = 1;
vga_console_vc.active = &vga_console_screen;
wsdisplay_cnattach(scr, &vga_console_screen,
vga_console_screen.cursorcol, vga_console_screen.cursorrow,
defattr);
vgaconsole = 1;
vga_console_type = type;
return (0);
}
void
vga_raster_init(struct vga_config *vc, bus_space_tag_t iot,
bus_space_tag_t memt)
{
struct vga_handle *vh = &vc->hdl;
u_int8_t mor;
struct vga_raster_font *vf;
vh->vh_iot = iot;
vh->vh_memt = memt;
if (bus_space_map(vh->vh_iot, 0x3c0, 0x10, 0, &vh->vh_ioh_vga))
panic("vga_raster_init: couldn't map vga io");
/* read "misc output register" */
mor = bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, 0xc);
vh->vh_mono = !(mor & 1);
if (bus_space_map(vh->vh_iot, (vh->vh_mono ? 0x3b0 : 0x3d0), 0x10, 0,
&vh->vh_ioh_6845))
panic("vga_raster_init: couldn't map 6845 io");
if (bus_space_map(vh->vh_memt, 0xa0000, 0x20000, 0, &vh->vh_allmemh))
panic("vga_raster_init: couldn't map memory");
if (bus_space_subregion(vh->vh_memt, vh->vh_allmemh, 0, 0x10000,
&vh->vh_memh))
panic("vga_raster_init: mem subrange failed");
/* should only reserve the space (no need to map - save KVM) */
vc->vc_biostag = memt;
if (bus_space_map(vc->vc_biostag, 0xc0000, 0x8000, 0, &vc->vc_bioshdl))
vc->vc_biosmapped = 0;
else
vc->vc_biosmapped = 1;
vc->nscreens = 0;
LIST_INIT(&vc->screens);
vc->active = NULL;
vc->currenttype = vh->vh_mono ? &vga_25lscreen_mono : &vga_25lscreen;
callout_init(&vc->vc_switch_callout);
vc->nfonts = 1;
LIST_INIT(&vc->vc_fontlist);
vf = &vga_console_fontset_ascii;
vga_load_builtinfont(vh, builtinfont_data, 0, 256);
vf->font = &builtinfont;
LIST_INSERT_HEAD(&vc->vc_fontlist, vf, next);
}
void
vga_raster_init_screen(struct vga_config *vc, struct vgascreen *scr,
const struct wsscreen_descr *type, int existing, long *attrp)
{
int cpos;
int res;
struct vga_handle *vh;
scr->cfg = vc;
scr->hdl = &vc->hdl;
scr->type = type;
scr->mindispoffset = 0;
scr->maxdispoffset = 0x10000;
scr->encoding = WSDISPLAY_FONTENC_IBM;
vh = &vc->hdl;
wsfont_init();
LIST_INIT(&scr->fontset);
vga_raster_setup_font(vc, scr);
if (existing) {
int i;
cpos = vga_6845_read(vh, cursorh) << 8;
cpos |= vga_6845_read(vh, cursorl);
/* make sure we have a valid cursor position */
if (cpos < 0 || cpos >= type->nrows * type->ncols)
cpos = 0;
scr->dispoffset = vga_6845_read(vh, startadrh) << 9;
scr->dispoffset |= vga_6845_read(vh, startadrl) << 1;
/* make sure we have a valid memory offset */
if (scr->dispoffset < scr->mindispoffset ||
scr->dispoffset > scr->maxdispoffset)
scr->dispoffset = scr->mindispoffset;
scr->mem = boot_scrmem;
scr->active = 1;
/* Save the current screen to memory. XXXBJY assume 80x25 */
for (i = 0; i < 80 * 25; i++) {
scr->mem[i].ch = bus_space_read_1(vh->vh_memt,
vh->vh_allmemh, 0x18000 + i * 2);
scr->mem[i].attr = bus_space_read_1(vh->vh_memt,
vh->vh_allmemh, 0x18000 + i * 2 + 1);
scr->mem[i].enc = WSDISPLAY_FONTENC_IBM;
}
vga_raster_setscreentype(vc, type);
/* Clear the entire screen. */
vga_gdc_write(vh, mode, 0x02);
bus_space_set_region_4(vh->vh_memt, vh->vh_allmemh, 0, 0,
0x4000);
vga_restore_screen(scr, type, scr->mem);
/* Delay to prevent the boot screen from being too
fast scrolled up. */
delay(1000000);
} else {
cpos = 0;
scr->dispoffset = scr->mindispoffset;
scr->mem = NULL;
scr->active = 0;
}
scr->cursorrow = cpos / type->ncols;
scr->cursorcol = cpos % type->ncols;
vga_raster_cursor_init(scr, existing);
#ifdef __alpha__
if (!vc->hdl.vh_mono)
/*
* DEC firmware uses a blue background.
*/
res = vga_raster_allocattr(scr, WSCOL_WHITE, WSCOL_BLUE,
WSATTR_WSCOLORS, attrp);
else
#endif
res = vga_raster_allocattr(scr, 0, 0, 0, attrp);
#ifdef DIAGNOSTIC
if (res)
panic("vga_raster_init_screen: attribute botch");
#endif
vc->nscreens++;
LIST_INSERT_HEAD(&vc->screens, scr, next);
}
void
vga_common_attach(struct vga_softc *sc, bus_space_tag_t iot,
bus_space_tag_t memt, int type, int quirks, const struct vga_funcs *vf)
{
int console;
struct vga_config *vc;
struct wsemuldisplaydev_attach_args aa;
console = vga_is_console(iot, type);
if (console) {
vc = &vga_console_vc;
vga_console_attached = 1;
} else {
vc = malloc(sizeof(struct vga_config), M_DEVBUF,
M_WAITOK);
vga_raster_init(vc, iot, memt);
}
vc->vc_type = type;
vc->vc_funcs = vf;
sc->sc_vc = vc;
vc->softc = sc;
aa.console = console;
aa.scrdata = (vc->hdl.vh_mono ? &vga_screenlist_mono : &vga_screenlist);
aa.accessops = &vga_raster_accessops;
aa.accesscookie = vc;
config_found(&sc->sc_dev, &aa, wsemuldisplaydevprint);
}
int
vga_is_console(bus_space_tag_t iot, int type)
{
if (vgaconsole &&
!vga_console_attached &&
iot == vga_console_vc.hdl.vh_iot &&
(vga_console_type == -1 || (type == vga_console_type)))
return (1);
return (0);
}
#define VGA_TS_BLANK 0x20
static int
vga_get_video(struct vga_config *vc)
{
return (vga_ts_read(&vc->hdl, mode) & VGA_TS_BLANK) == 0;
}
static void
vga_set_video(struct vga_config *vc, int state)
{
int val;
vga_ts_write(&vc->hdl, syncreset, 0x01);
if (state) { /* unblank screen */
val = vga_ts_read(&vc->hdl, mode);
vga_ts_write(&vc->hdl, mode, val & ~VGA_TS_BLANK);
#ifndef VGA_NO_VBLANK
val = vga_6845_read(&vc->hdl, mode);
vga_6845_write(&vc->hdl, mode, val | 0x80);
#endif
} else { /* blank screen */
val = vga_ts_read(&vc->hdl, mode);
vga_ts_write(&vc->hdl, mode, val | VGA_TS_BLANK);
#ifndef VGA_NO_VBLANK
val = vga_6845_read(&vc->hdl, mode);
vga_6845_write(&vc->hdl, mode, val & ~0x80);
#endif
}
vga_ts_write(&vc->hdl, syncreset, 0x03);
}
int
vga_raster_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
{
struct vga_config *vc = v;
const struct vga_funcs *vf = vc->vc_funcs;
switch (cmd) {
case WSDISPLAYIO_GTYPE:
*(int *)data = vc->vc_type;
return 0;
case WSDISPLAYIO_GINFO:
/* XXX should get detailed hardware information here */
return EPASSTHROUGH;
case WSDISPLAYIO_GVIDEO:
#if 1
*(int *)data = (vga_get_video(vc) ? WSDISPLAYIO_VIDEO_ON :
WSDISPLAYIO_VIDEO_OFF);
return 0;
#endif
case WSDISPLAYIO_SVIDEO:
#if 1
vga_set_video(vc, *(int *)data == WSDISPLAYIO_VIDEO_ON);
return 0;
#endif
case WSDISPLAYIO_GETCMAP:
case WSDISPLAYIO_PUTCMAP:
case WSDISPLAYIO_GCURPOS:
case WSDISPLAYIO_SCURPOS:
case WSDISPLAYIO_GCURMAX:
case WSDISPLAYIO_GCURSOR:
case WSDISPLAYIO_SCURSOR:
/* NONE of these operations are by the generic VGA driver. */
return EPASSTHROUGH;
}
if (vc->vc_funcs == NULL)
return (EPASSTHROUGH);
if (vf->vf_ioctl == NULL)
return (EPASSTHROUGH);
return ((*vf->vf_ioctl)(v, cmd, data, flag, p));
}
static paddr_t
vga_raster_mmap(void *v, off_t offset, int prot)
{
struct vga_config *vc = v;
const struct vga_funcs *vf = vc->vc_funcs;
if (vc->vc_funcs == NULL)
return (-1);
if (vf->vf_mmap == NULL)
return (-1);
return ((*vf->vf_mmap)(v, offset, prot));
}
int
vga_raster_alloc_screen(void *v, const struct wsscreen_descr *type,
void **cookiep, int *curxp, int *curyp, long *defattrp)
{
struct vga_config *vc = v;
struct vgascreen *scr;
if (vc->nscreens == 1) {
vc->screens.lh_first->mem = boot_scrmem;
}
scr = malloc(sizeof(struct vgascreen), M_DEVBUF, M_WAITOK);
vga_raster_init_screen(vc, scr, type, vc->nscreens == 0, defattrp);
if (vc->nscreens == 1) {
scr->active = 1;
vc->active = scr;
vc->currenttype = type;
} else {
scr->mem = malloc(sizeof(struct vga_scrmem) *
type->ncols * type->nrows, M_DEVBUF, M_WAITOK);
vga_raster_eraserows(scr, 0, type->nrows, *defattrp);
}
*cookiep = scr;
*curxp = scr->cursorcol;
*curyp = scr->cursorrow;
return (0);
}
void
vga_raster_free_screen(void *v, void *cookie)
{
struct vgascreen *vs = cookie;
struct vga_config *vc = vs->cfg;
LIST_REMOVE(vs, next);
if (vs != &vga_console_screen)
free(vs, M_DEVBUF);
else
panic("vga_raster_free_screen: console");
if (vc->active == vs)
vc->active = 0;
}
int
vga_raster_show_screen(void *v, void *cookie, int waitok,
void (*cb)(void *, int, int), void *cbarg)
{
struct vgascreen *scr = cookie, *oldscr;
struct vga_config *vc = scr->cfg;
oldscr = vc->active; /* can be NULL! */
if (scr == oldscr) {
return (0);
}
vc->wantedscreen = cookie;
vc->switchcb = cb;
vc->switchcbarg = cbarg;
if (cb) {
callout_reset(&vc->vc_switch_callout, 0,
(void(*)(void *))vga_switch_screen, vc);
return (EAGAIN);
}
vga_switch_screen(vc);
return (0);
}
void
vga_switch_screen(struct vga_config *vc)
{
struct vgascreen *scr, *oldscr;
struct vga_handle *vh = &vc->hdl;
const struct wsscreen_descr *type;
scr = vc->wantedscreen;
if (!scr) {
printf("vga_switch_screen: disappeared\n");
(*vc->switchcb)(vc->switchcbarg, EIO, 0);
return;
}
type = scr->type;
oldscr = vc->active; /* can be NULL! */
#ifdef DIAGNOSTIC
if (oldscr) {
if (!oldscr->active)
panic("vga_raster_show_screen: not active");
if (oldscr->type != vc->currenttype)
panic("vga_raster_show_screen: bad type");
}
#endif
if (scr == oldscr) {
return;
}
#ifdef DIAGNOSTIC
if (scr->active)
panic("vga_raster_show_screen: active");
#endif
if (oldscr)
oldscr->active = 0;
if (vc->currenttype != type) {
vga_raster_setscreentype(vc, type);
vc->currenttype = type;
}
scr->dispoffset = scr->mindispoffset;
if (!oldscr || (scr->dispoffset != oldscr->dispoffset)) {
vga_6845_write(vh, startadrh, scr->dispoffset >> 8);
vga_6845_write(vh, startadrl, scr->dispoffset);
}
/* Clear the entire screen. */
vga_gdc_write(vh, mode, 0x02);
bus_space_set_region_4(vh->vh_memt, vh->vh_allmemh, 0, 0, 0x2000);
scr->active = 1;
vga_restore_screen(scr, type, scr->mem);
vc->active = scr;
vga_raster_cursor(scr, scr->cursoron, scr->cursorrow, scr->cursorcol);
vc->wantedscreen = 0;
if (vc->switchcb)
(*vc->switchcb)(vc->switchcbarg, 0, 0);
}
static int
vga_raster_load_font(void *v, void *id, struct wsdisplay_font *data)
{
/* XXX */
return (0);
}
void
vga_raster_setup_font(struct vga_config *vc, struct vgascreen *scr)
{
struct vga_raster_font *vf;
struct wsdisplay_font *wf;
int cookie;
LIST_FOREACH(vf, &vc->vc_fontlist, next) {
if (wsfont_matches(vf->font, 0, 0, scr->type->fontheight, 0)) {
LIST_INSERT_HEAD(&scr->fontset, vf, next);
return;
}
}
cookie = wsfont_find(0, 0, scr->type->fontheight, 0,
WSDISPLAY_FONTORDER_L2R, 0);
if (cookie == -1)
return;
if (wsfont_lock(cookie, &wf))
return;
vf = malloc(sizeof(struct vga_raster_font), M_DEVBUF, M_NOWAIT);
if (!vf) {
wsfont_unlock(cookie);
return;
}
vf->font = wf;
LIST_INSERT_HEAD(&scr->fontset, vf, next);
}
void
vga_setup_regs(struct videomode *mode, struct vga_moderegs *regs)
{
int i;
int depth = 4; /* XXXBJY hardcoded for now */
int palette[16] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07,
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f
};
/*
* Compute hsync and vsync polarity.
*/
if ((mode->flags & (VID_PHSYNC | VID_NHSYNC))
&& (mode->flags & (VID_PVSYNC | VID_NVSYNC))) {
regs->miscout = 0x23;
if (mode->flags & VID_NHSYNC)
regs->miscout |= 0x40;
if (mode->flags & VID_NVSYNC)
regs->miscout |= 0x80;
} else {
if (mode->flags & VID_DBLSCAN)
mode->vdisplay *= 2;
if (mode->vdisplay < 400)
regs->miscout = 0xa3;
if (mode->vdisplay < 480)
regs->miscout = 0x63;
if (mode->vdisplay < 768)
regs->miscout = 0xe3;
else
regs->miscout = 0x23;
}
/*
* Time sequencer
*/
if (depth == 4)
regs->ts[0] = 0x02;
else
regs->ts[0] = 0x00;
if (mode->flags & VID_CLKDIV2)
regs->ts[1] = 0x09;
else
regs->ts[1] = 0x01;
regs->ts[2] = 0x0f;
regs->ts[3] = 0x00;
if (depth < 8)
regs->ts[4] = 0x06;
else
regs->ts[4] = 0x0e;
/*
* CRTC controller
*/
regs->crtc[0] = (mode->htotal >> 3) - 5;
regs->crtc[1] = (mode->hdisplay >> 3) - 1;
regs->crtc[2] = (mode->hsync_start >> 3) - 1;
regs->crtc[3] = (((mode->hsync_end >> 3) - 1) & 0x1f) | 0x80;
regs->crtc[4] = mode->hsync_start >> 3;
regs->crtc[5] = ((((mode->hsync_end >> 3) - 1) & 0x20) << 2)
| (((mode->hsync_end >> 3)) & 0x1f);
regs->crtc[6] = (mode->vtotal - 2) & 0xff;
regs->crtc[7] = (((mode->vtotal - 2) & 0x100) >> 8)
| (((mode->vdisplay - 1) & 0x100) >> 7)
| ((mode->vsync_start & 0x100) >> 6)
| (((mode->vsync_start - 1) & 0x100) >> 5)
| 0x10
| (((mode->vtotal - 2) & 0x200) >> 4)
| (((mode->vdisplay - 1) & 0x200) >> 3)
| ((mode->vsync_start & 0x200) >> 2);
regs->crtc[8] = 0x00;
regs->crtc[9] = (((mode->vsync_start - 1) & 0x200) >> 4) | 0x40;
if (mode->flags & VID_DBLSCAN)
regs->crtc[9] |= 0x80;
regs->crtc[10] = 0x00;
regs->crtc[11] = 0x00;
regs->crtc[12] = 0x00;
regs->crtc[13] = 0x00;
regs->crtc[14] = 0x00;
regs->crtc[15] = 0x00;
regs->crtc[16] = mode->vsync_start & 0xff;
regs->crtc[17] = (mode->vsync_end & 0x0f) | 0x20;
regs->crtc[18] = (mode->vdisplay - 1) & 0xff;
regs->crtc[19] = mode->hdisplay >> 4; /* XXXBJY */
regs->crtc[20] = 0x00;
regs->crtc[21] = (mode->vsync_start - 1) & 0xff;
regs->crtc[22] = (mode->vsync_end - 1) & 0xff;
if (depth < 8)
regs->crtc[23] = 0xe3;
else
regs->crtc[23] = 0xc3;
regs->crtc[24] = 0xff;
/*
* Graphics display controller
*/
regs->gdc[0] = 0x00;
regs->gdc[1] = 0x00;
regs->gdc[2] = 0x00;
regs->gdc[3] = 0x00;
regs->gdc[4] = 0x00;
if (depth == 4)
regs->gdc[5] = 0x02;
else
regs->gdc[5] = 0x40;
regs->gdc[6] = 0x01;
regs->gdc[7] = 0x0f;
regs->gdc[8] = 0xff;
/*
* Attribute controller
*/
/* Set palette registers. */
for (i = 0; i < 16; i++)
regs->atc[i] = palette[i];
if (depth == 4)
regs->atc[16] = 0x01; /* XXXBJY was 0x81 in XFree86 */
else
regs->atc[16] = 0x41;
regs->atc[17] = 0x00; /* XXXBJY just a guess */
regs->atc[18] = 0x0f;
regs->atc[19] = 0x00;
regs->atc[20] = 0x00;
}
void
vga_set_mode(struct vga_handle *vh, struct vga_moderegs *regs)
{
int i;
/* Disable display. */
vga_ts_write(vh, mode, vga_ts_read(vh, mode) | 0x20);
/* Write misc output register. */
bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_MISC_DATAW,
regs->miscout);
/* Set synchronous reset. */
vga_ts_write(vh, syncreset, 0x01);
vga_ts_write(vh, mode, regs->ts[1] | 0x20);
for (i = 2; i < VGA_TS_NREGS; i++)
_vga_ts_write(vh, i, regs->ts[i]);
/* Clear synchronous reset. */
vga_ts_write(vh, syncreset, 0x03);
/* Unprotect CRTC registers 0-7. */
_vga_crtc_write(vh, 17, _vga_crtc_read(vh, 17) & 0x7f);
/* Write CRTC registers. */
for (i = 0; i < VGA_CRTC_NREGS; i++)
_vga_crtc_write(vh, i, regs->crtc[i]);
/* Write graphics display registers. */
for (i = 0; i < VGA_GDC_NREGS; i++)
_vga_gdc_write(vh, i, regs->gdc[i]);
/* Write attribute controller registers. */
for (i = 0; i < VGA_ATC_NREGS; i++)
_vga_attr_write(vh, i, regs->atc[i]);
/* Enable display. */
vga_ts_write(vh, mode, vga_ts_read(vh, mode) & 0xdf);
}
void
vga_raster_cursor_init(struct vgascreen *scr, int existing)
{
struct vga_handle *vh = scr->hdl;
bus_space_tag_t memt;
bus_space_handle_t memh;
int off;
if (existing) {
/*
* This is the first screen. At this point, scr->active is
* false, so we can't use vga_raster_cursor() to do this.
*/
memt = vh->vh_memt;
memh = vh->vh_memh;
off = (scr->cursorrow * scr->type->ncols + scr->cursorcol) +
scr->dispoffset / 8;
scr->cursortmp = scr->mem[off];
vga_raster_putchar(scr, scr->cursorrow, scr->cursorcol,
scr->cursortmp.ch, scr->cursortmp.attr ^ 0x77);
} else {
scr->cursortmp.ch = 0;
scr->cursortmp.attr = 0;
scr->cursortmp.second = 0;
scr->cursortmp.enc = WSDISPLAY_FONTENC_IBM;
}
scr->cursoron = 1;
}
void
vga_raster_cursor(void *id, int on, int row, int col)
{
struct vgascreen *scr = id;
int off, tmp;
/* Remove old cursor image */
if (scr->cursoron) {
off = scr->cursorrow * scr->type->ncols + scr->cursorcol;
if (scr->active) {
tmp = scr->encoding;
scr->encoding = scr->cursortmp.enc;
if (scr->cursortmp.second)
vga_raster_putchar(id, scr->cursorrow,
scr->cursorcol - 1, scr->cursortmp.ch,
scr->cursortmp.attr);
else
vga_raster_putchar(id, scr->cursorrow,
scr->cursorcol, scr->cursortmp.ch,
scr->cursortmp.attr);
scr->encoding = tmp;
}
}
scr->cursorrow = row;
scr->cursorcol = col;
if ((scr->cursoron = on) == 0)
return;
off = scr->cursorrow * scr->type->ncols + scr->cursorcol;
scr->cursortmp = scr->mem[off];
if (scr->active) {
tmp = scr->encoding;
scr->encoding = scr->cursortmp.enc;
if (scr->cursortmp.second)
vga_raster_putchar(id, scr->cursorrow,
scr->cursorcol - 1, scr->cursortmp.ch,
scr->cursortmp.attr ^ 0x77);
else
vga_raster_putchar(id, scr->cursorrow,
scr->cursorcol, scr->cursortmp.ch,
scr->cursortmp.attr ^ 0x77);
scr->encoding = tmp;
}
}
static int
vga_raster_mapchar(void *id, int uni, u_int *index)
{
struct vgascreen *scr = id;
if (scr->encoding == WSDISPLAY_FONTENC_IBM)
return pcdisplay_mapchar(id, uni, index);
else {
*index = uni;
return 5;
}
}
void
vga_raster_putchar(void *id, int row, int col, u_int c, long attr)
{
struct vgascreen *scr = id;
int off;
struct vga_raster_font *fs;
u_int tmp_ch;
off = row * scr->type->ncols + col;
LIST_FOREACH(fs, &scr->fontset, next) {
if ((scr->encoding == fs->font->encoding) &&
(c >= fs->font->firstchar) &&
(c < fs->font->firstchar + fs->font->numchars) &&
(scr->type->fontheight == fs->font->fontheight)) {
if (scr->active) {
tmp_ch = c - fs->font->firstchar;
_vga_raster_putchar(scr, row, col, tmp_ch,
attr, fs);
}
scr->mem[off].ch = c;
scr->mem[off].attr = attr;
scr->mem[off].second = 0;
scr->mem[off].enc = fs->font->encoding;
if (fs->font->stride == 2) {
scr->mem[off + 1].ch = c;
scr->mem[off + 1].attr = attr;
scr->mem[off + 1].second = 1;
scr->mem[off + 1].enc = fs->font->encoding;
}
return;
}
}
/*
* No match found.
*/
if (scr->active)
/* Put a single width space character no matter what the
actual width of the character is. */
_vga_raster_putchar(scr, row, col, 0x20, attr,
&vga_console_fontset_ascii);
scr->mem[off].ch = c;
scr->mem[off].attr = attr;
scr->mem[off].second = 0;
scr->mem[off].enc = WSDISPLAY_FONTENC_IBM;
}
static void
_vga_raster_putchar(void *id, int row, int col, u_int c, long attr,
struct vga_raster_font *fs)
{
struct vgascreen *scr = id;
struct vga_handle *vh = scr->hdl;
bus_space_tag_t memt = vh->vh_memt;
bus_space_handle_t memh = vh->vh_memh;
int i;
int rasoff, rasoff2;
int fheight = scr->type->fontheight;
volatile u_int8_t dummy, pattern;
u_int8_t fgcolor, bgcolor;
rasoff = scr->dispoffset + row * scr->type->ncols * fheight + col;
rasoff2 = rasoff;
#if 0
bgcolor = bgansitopc[attr >> 4];
fgcolor = fgansitopc[attr & 0x0f];
#else
bgcolor = ((attr >> 4) & 0x0f);
fgcolor = attr & 0x0f;
#endif
if (fs->font->stride == 1) {
/* Paint background. */
vga_gdc_write(vh, mode, 0x02);
for (i = 0; i < fheight; i++) {
bus_space_write_1(memt, memh, rasoff, bgcolor);
rasoff += scr->type->ncols;
}
/* Draw a single width character. */
vga_gdc_write(vh, mode, 0x03);
vga_gdc_write(vh, setres, fgcolor);
for (i = 0; i < fheight; i++) {
pattern = ((u_int8_t *)fs->font->data)[c * fheight + i];
/* When pattern is 0, skip output for speed-up. */
if (pattern != 0) {
dummy = bus_space_read_1(memt, memh, rasoff2);
bus_space_write_1(memt, memh, rasoff2, pattern);
}
rasoff2 += scr->type->ncols;
}
} else if (fs->font->stride == 2) {
/* Paint background. */
vga_gdc_write(vh, mode, 0x02);
for (i = 0; i < fheight; i++) {
bus_space_write_1(memt, memh, rasoff, bgcolor);
bus_space_write_1(memt, memh, rasoff + 1, bgcolor);
rasoff += scr->type->ncols;
}
/* Draw a double width character. */
vga_gdc_write(vh, mode, 0x03);
vga_gdc_write(vh, setres, fgcolor);
for (i = 0; i < fheight; i++) {
pattern = ((u_int8_t *)fs->font->data)
[(c * fheight + i) * 2];
if (pattern != 0) {
dummy = bus_space_read_1(memt, memh, rasoff2);
bus_space_write_1(memt, memh, rasoff2, pattern);
}
pattern = ((u_int8_t *)fs->font->data)
[(c * fheight + i) * 2 + 1];
if (pattern != 0) {
rasoff2++;
dummy = bus_space_read_1(memt, memh, rasoff2);
bus_space_write_1(memt, memh, rasoff2, pattern);
rasoff2--;
}
rasoff2 += scr->type->ncols;
}
}
}
void
vga_raster_copycols(void *id, int row, int srccol, int dstcol, int ncols)
{
struct vgascreen *scr = id;
struct vga_handle *vh = scr->hdl;
bus_space_tag_t memt = vh->vh_memt;
bus_space_handle_t memh = vh->vh_memh;
bus_size_t srcoff, dstoff;
bus_size_t rassrcoff, rasdstoff;
int i;
int fheight = scr->type->fontheight;
srcoff = row * scr->type->ncols + srccol;
dstoff = row * scr->type->ncols + dstcol;
rassrcoff = scr->dispoffset + row * scr->type->ncols * fheight + srccol;
rasdstoff = scr->dispoffset + row * scr->type->ncols * fheight + dstcol;
memcpy(&scr->mem[dstoff], &scr->mem[srcoff],
ncols * sizeof(struct vga_scrmem));
vga_gdc_write(vh, mode, 0x01);
if (scr->active) {
for (i = 0; i < fheight; i++) {
bus_space_copy_region_1(memt, memh,
rassrcoff + i * scr->type->ncols, memh,
rasdstoff + i * scr->type->ncols, ncols);
}
}
}
void
vga_raster_erasecols(void *id, int row, int startcol, int ncols, long fillattr)
{
struct vgascreen *scr = id;
int i;
if (scr->active == 0)
return;
for (i = startcol; i < startcol + ncols; i++)
vga_raster_putchar(id, row, i, ' ', fillattr);
}
void
vga_raster_copyrows(void *id, int srcrow, int dstrow, int nrows)
{
struct vgascreen *scr = id;
struct vga_handle *vh = scr->hdl;
bus_space_tag_t memt = vh->vh_memt;
bus_space_handle_t memh = vh->vh_memh;
int ncols;
bus_size_t srcoff, dstoff;
bus_size_t rassrcoff, rasdstoff;
int fheight;
ncols = scr->type->ncols;
fheight = scr->type->fontheight;
srcoff = srcrow * ncols;
dstoff = dstrow * ncols;
rassrcoff = srcoff * fheight;
rasdstoff = dstoff * fheight;
if (scr->active) {
vga_gdc_write(vh, mode, 0x01);
if (dstrow == 0 && (srcrow + nrows == scr->type->nrows)) {
int cursoron = scr->cursoron;
if (cursoron)
/* Disable cursor. */
vga_raster_cursor(scr, 0,
scr->cursorrow, scr->cursorcol);
/* scroll up whole screen */
if ((scr->dispoffset + srcrow * ncols * fheight)
<= scr->maxdispoffset)
scr->dispoffset += srcrow * ncols * fheight;
else {
bus_space_copy_region_1(memt, memh,
scr->dispoffset + rassrcoff,
memh, scr->mindispoffset,
nrows * ncols * fheight);
scr->dispoffset = scr->mindispoffset;
}
vga_6845_write(vh, startadrh, scr->dispoffset >> 8);
vga_6845_write(vh, startadrl, scr->dispoffset);
if (cursoron)
/* Enable cursor. */
vga_raster_cursor(scr, 1, scr->cursorrow,
scr->cursorcol);
} else
bus_space_copy_region_1(memt, memh,
scr->dispoffset + rassrcoff, memh,
scr->dispoffset + rasdstoff,
nrows * ncols * fheight);
}
memcpy(&scr->mem[dstoff], &scr->mem[srcoff],
nrows * ncols * sizeof(struct vga_scrmem));
}
void
vga_raster_eraserows(void *id, int startrow, int nrows, long fillattr)
{
struct vgascreen *scr = id;
struct vga_handle *vh = scr->hdl;
bus_space_tag_t memt = vh->vh_memt;
bus_space_handle_t memh = vh->vh_memh;
bus_size_t off, count;
bus_size_t rasoff, rascount;
int i;
off = startrow * scr->type->ncols;
count = nrows * scr->type->ncols;
rasoff = off * scr->type->fontheight;
rascount = count * scr->type->fontheight;
if (scr->active) {
/* Paint background. */
vga_gdc_write(vh, mode, 0x02);
if (scr->type->ncols % 4 == 0)
/* We can speed up I/O */
for (i = rasoff; i < rasoff + rascount; i += 4)
bus_space_write_4(memt, memh,
scr->dispoffset + i, fillattr >> 4);
else
for (i = rasoff; i < rasoff + rascount; i += 2)
bus_space_write_2(memt, memh,
scr->dispoffset + i, fillattr >> 4);
}
for (i = 0; i < count; i++) {
scr->mem[off + i].ch = ' ';
scr->mem[off + i].attr = fillattr;
scr->mem[off + i].second = 0;
scr->mem[off + i].enc = WSDISPLAY_FONTENC_IBM;
}
}
static int
vga_raster_allocattr(void *id, int fg, int bg, int flags, long *attrp)
{
struct vgascreen *scr = id;
struct vga_config *vc = scr->cfg;
if (vc->hdl.vh_mono) {
if (flags & WSATTR_WSCOLORS)
return (EINVAL);
if (flags & WSATTR_REVERSE)
*attrp = 0x70;
else
*attrp = 0x07;
if (flags & WSATTR_UNDERLINE)
*attrp |= FG_UNDERLINE;
if (flags & WSATTR_HILIT)
*attrp |= FG_INTENSE;
} else {
if (flags & (WSATTR_UNDERLINE | WSATTR_REVERSE))
return (EINVAL);
if (flags & WSATTR_WSCOLORS)
*attrp = fgansitopc[fg] | bgansitopc[bg];
else
*attrp = 7;
if (flags & WSATTR_HILIT)
*attrp += 8;
}
if (flags & WSATTR_BLINK)
*attrp |= FG_BLINK;
return (0);
}
void
vga_restore_screen(struct vgascreen *scr,
const struct wsscreen_descr *type, struct vga_scrmem *mem)
{
int i, j, off, tmp;
tmp = scr->encoding;
for (i = 0; i < type->nrows; i++) {
for (j = 0; j < type->ncols; j++) {
off = i * type->ncols + j;
if (mem[off].second != 1) {
scr->encoding = mem[off].enc;
vga_raster_putchar(scr, i, j, mem[off].ch,
mem[off].attr);
}
}
}
scr->encoding = tmp;
}
void
vga_raster_setscreentype(struct vga_config *vc,
const struct wsscreen_descr *type)
{
struct vga_handle *vh = &vc->hdl;
struct vga_moderegs moderegs;
vga_setup_regs((struct videomode *)type->modecookie, &moderegs);
vga_set_mode(vh, &moderegs);
}
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