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37a107a407
freebsd-dev/sys/dev/fb/vesa.c
Glen Barber 37a107a407 Revert r267961, r267973: 
These changes prevent sysctl(8) from returning proper output,
such as:

 1) no output from sysctl(8)
 2) erroneously returning ENOMEM with tools like truss(1)
    or uname(1)
 truss: can not get etype: Cannot allocate memory
2014-06-27 22:05:21 +00:00

1985 lines
47 KiB
C
Raw Blame History

/*-
* Copyright (c) 1998 Kazutaka YOKOTA and Michael Smith
* Copyright (c) 2009-2013 Jung-uk Kim <jkim@FreeBSD.org>
* 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.
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_vga.h"
#include "opt_vesa.h"
#ifndef VGA_NO_MODE_CHANGE
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/fbio.h>
#include <sys/sysctl.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/vm_kern.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <machine/pc/bios.h>
#include <dev/fb/vesa.h>
#include <dev/fb/fbreg.h>
#include <dev/fb/vgareg.h>
#include <dev/pci/pcivar.h>
#include <isa/isareg.h>
#include <compat/x86bios/x86bios.h>
#define VESA_BIOS_OFFSET 0xc0000
#define VESA_PALETTE_SIZE (256 * 4)
#define VESA_VIA_CLE266 "VIA CLE266\r\n"
#ifndef VESA_DEBUG
#define VESA_DEBUG 0
#endif
/* VESA video adapter state buffer stub */
struct adp_state {
int sig;
#define V_STATE_SIG 0x61736576
u_char regs[1];
};
typedef struct adp_state adp_state_t;
static struct mtx vesa_lock;
static int vesa_state;
static void *vesa_state_buf;
static uint32_t vesa_state_buf_offs;
static size_t vesa_state_buf_size;
static u_char *vesa_palette;
static uint32_t vesa_palette_offs;
static void *vesa_vmem_buf;
static size_t vesa_vmem_max;
static void *vesa_bios;
static uint32_t vesa_bios_offs;
static uint32_t vesa_bios_int10;
static size_t vesa_bios_size;
/* VESA video adapter */
static video_adapter_t *vesa_adp;
static SYSCTL_NODE(_debug, OID_AUTO, vesa, CTLFLAG_RD, NULL, "VESA debugging");
static int vesa_shadow_rom;
TUNABLE_INT("debug.vesa.shadow_rom", &vesa_shadow_rom);
SYSCTL_INT(_debug_vesa, OID_AUTO, shadow_rom, CTLFLAG_RDTUN, &vesa_shadow_rom,
0, "Enable video BIOS shadow");
/* VESA functions */
#if 0
static int vesa_nop(void);
#endif
static int vesa_error(void);
static vi_probe_t vesa_probe;
static vi_init_t vesa_init;
static vi_get_info_t vesa_get_info;
static vi_query_mode_t vesa_query_mode;
static vi_set_mode_t vesa_set_mode;
static vi_save_font_t vesa_save_font;
static vi_load_font_t vesa_load_font;
static vi_show_font_t vesa_show_font;
static vi_save_palette_t vesa_save_palette;
static vi_load_palette_t vesa_load_palette;
static vi_set_border_t vesa_set_border;
static vi_save_state_t vesa_save_state;
static vi_load_state_t vesa_load_state;
static vi_set_win_org_t vesa_set_origin;
static vi_read_hw_cursor_t vesa_read_hw_cursor;
static vi_set_hw_cursor_t vesa_set_hw_cursor;
static vi_set_hw_cursor_shape_t vesa_set_hw_cursor_shape;
static vi_blank_display_t vesa_blank_display;
static vi_mmap_t vesa_mmap;
static vi_ioctl_t vesa_ioctl;
static vi_clear_t vesa_clear;
static vi_fill_rect_t vesa_fill_rect;
static vi_bitblt_t vesa_bitblt;
static vi_diag_t vesa_diag;
static int vesa_bios_info(int level);
static video_switch_t vesavidsw = {
vesa_probe,
vesa_init,
vesa_get_info,
vesa_query_mode,
vesa_set_mode,
vesa_save_font,
vesa_load_font,
vesa_show_font,
vesa_save_palette,
vesa_load_palette,
vesa_set_border,
vesa_save_state,
vesa_load_state,
vesa_set_origin,
vesa_read_hw_cursor,
vesa_set_hw_cursor,
vesa_set_hw_cursor_shape,
vesa_blank_display,
vesa_mmap,
vesa_ioctl,
vesa_clear,
vesa_fill_rect,
vesa_bitblt,
vesa_error,
vesa_error,
vesa_diag,
};
static video_switch_t *prevvidsw;
/* VESA BIOS video modes */
#define VESA_MAXMODES 64
#define EOT (-1)
#define NA (-2)
#define MODE_TABLE_DELTA 8
static int vesa_vmode_max;
static video_info_t *vesa_vmode;
static int vesa_init_done;
static struct vesa_info *vesa_adp_info;
static u_int16_t *vesa_vmodetab;
static char *vesa_oemstr;
static char *vesa_venderstr;
static char *vesa_prodstr;
static char *vesa_revstr;
/* local macros and functions */
#define BIOS_SADDRTOLADDR(p) ((((p) & 0xffff0000) >> 12) + ((p) & 0x0000ffff))
static int int10_set_mode(int mode);
static int vesa_bios_post(void);
static int vesa_bios_get_mode(int mode, struct vesa_mode *vmode, int flags);
static int vesa_bios_set_mode(int mode);
#if 0
static int vesa_bios_get_dac(void);
#endif
static int vesa_bios_set_dac(int bits);
static int vesa_bios_save_palette(int start, int colors, u_char *palette,
int bits);
static int vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g,
u_char *b, int bits);
static int vesa_bios_load_palette(int start, int colors, u_char *palette,
int bits);
static int vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g,
u_char *b, int bits);
#define STATE_SIZE 0
#define STATE_SAVE 1
#define STATE_LOAD 2
static size_t vesa_bios_state_buf_size(int);
static int vesa_bios_save_restore(int code, void *p);
#ifdef MODE_TABLE_BROKEN
static int vesa_bios_get_line_length(void);
#endif
static int vesa_bios_set_line_length(int pixel, int *bytes, int *lines);
#if 0
static int vesa_bios_get_start(int *x, int *y);
#endif
static int vesa_bios_set_start(int x, int y);
static int vesa_map_gen_mode_num(int type, int color, int mode);
static int vesa_translate_flags(u_int16_t vflags);
static int vesa_translate_mmodel(u_int8_t vmodel);
static int vesa_get_bpscanline(struct vesa_mode *vmode);
static int vesa_bios_init(void);
static void vesa_bios_uninit(void);
static void vesa_clear_modes(video_info_t *info, int color);
#if 0
static int vesa_get_origin(video_adapter_t *adp, off_t *offset);
#endif
/* INT 10 BIOS calls */
static int
int10_set_mode(int mode)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AL = mode;
x86bios_intr(&regs, 0x10);
return (0);
}
static int
vesa_bios_post(void)
{
x86regs_t regs;
devclass_t dc;
device_t *devs;
device_t dev;
int count, i, is_pci;
if (x86bios_get_orm(vesa_bios_offs) == NULL)
return (1);
dev = NULL;
is_pci = 0;
/* Find the matching PCI video controller. */
dc = devclass_find("vgapci");
if (dc != NULL && devclass_get_devices(dc, &devs, &count) == 0) {
for (i = 0; i < count; i++)
if (device_get_flags(devs[i]) != 0 &&
x86bios_match_device(vesa_bios_offs, devs[i])) {
dev = devs[i];
is_pci = 1;
break;
}
free(devs, M_TEMP);
}
/* Try VGA if a PCI device is not found. */
if (dev == NULL) {
dc = devclass_find(VGA_DRIVER_NAME);
if (dc != NULL)
dev = devclass_get_device(dc, 0);
}
if (bootverbose)
printf("%s: calling BIOS POST\n",
dev == NULL ? "VESA" : device_get_nameunit(dev));
x86bios_init_regs(&regs);
if (is_pci) {
regs.R_AH = pci_get_bus(dev);
regs.R_AL = (pci_get_slot(dev) << 3) |
(pci_get_function(dev) & 0x07);
}
regs.R_DL = 0x80;
x86bios_call(&regs, X86BIOS_PHYSTOSEG(vesa_bios_offs + 3),
X86BIOS_PHYSTOOFF(vesa_bios_offs + 3));
if (x86bios_get_intr(0x10) == 0)
return (1);
return (0);
}
/* VESA BIOS calls */
static int
vesa_bios_get_mode(int mode, struct vesa_mode *vmode, int flags)
{
x86regs_t regs;
uint32_t offs;
void *buf;
buf = x86bios_alloc(&offs, sizeof(*vmode), flags);
if (buf == NULL)
return (1);
x86bios_init_regs(&regs);
regs.R_AX = 0x4f01;
regs.R_CX = mode;
regs.R_ES = X86BIOS_PHYSTOSEG(offs);
regs.R_DI = X86BIOS_PHYSTOOFF(offs);
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f) {
x86bios_free(buf, sizeof(*vmode));
return (1);
}
bcopy(buf, vmode, sizeof(*vmode));
x86bios_free(buf, sizeof(*vmode));
return (0);
}
static int
vesa_bios_set_mode(int mode)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f02;
regs.R_BX = mode;
x86bios_intr(&regs, 0x10);
return (regs.R_AX != 0x004f);
}
#if 0
static int
vesa_bios_get_dac(void)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f08;
regs.R_BL = 1;
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f)
return (6);
return (regs.R_BH);
}
#endif
static int
vesa_bios_set_dac(int bits)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f08;
/* regs.R_BL = 0; */
regs.R_BH = bits;
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f)
return (6);
return (regs.R_BH);
}
static int
vesa_bios_save_palette(int start, int colors, u_char *palette, int bits)
{
x86regs_t regs;
int i;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f09;
regs.R_BL = 1;
regs.R_CX = colors;
regs.R_DX = start;
regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
bits = 8 - bits;
mtx_lock(&vesa_lock);
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f) {
mtx_unlock(&vesa_lock);
return (1);
}
for (i = 0; i < colors; ++i) {
palette[i * 3] = vesa_palette[i * 4 + 2] << bits;
palette[i * 3 + 1] = vesa_palette[i * 4 + 1] << bits;
palette[i * 3 + 2] = vesa_palette[i * 4] << bits;
}
mtx_unlock(&vesa_lock);
return (0);
}
static int
vesa_bios_save_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
int bits)
{
x86regs_t regs;
int i;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f09;
regs.R_BL = 1;
regs.R_CX = colors;
regs.R_DX = start;
regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
bits = 8 - bits;
mtx_lock(&vesa_lock);
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f) {
mtx_unlock(&vesa_lock);
return (1);
}
for (i = 0; i < colors; ++i) {
r[i] = vesa_palette[i * 4 + 2] << bits;
g[i] = vesa_palette[i * 4 + 1] << bits;
b[i] = vesa_palette[i * 4] << bits;
}
mtx_unlock(&vesa_lock);
return (0);
}
static int
vesa_bios_load_palette(int start, int colors, u_char *palette, int bits)
{
x86regs_t regs;
int i;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f09;
/* regs.R_BL = 0; */
regs.R_CX = colors;
regs.R_DX = start;
regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
bits = 8 - bits;
mtx_lock(&vesa_lock);
for (i = 0; i < colors; ++i) {
vesa_palette[i * 4] = palette[i * 3 + 2] >> bits;
vesa_palette[i * 4 + 1] = palette[i * 3 + 1] >> bits;
vesa_palette[i * 4 + 2] = palette[i * 3] >> bits;
vesa_palette[i * 4 + 3] = 0;
}
x86bios_intr(&regs, 0x10);
mtx_unlock(&vesa_lock);
return (regs.R_AX != 0x004f);
}
static int
vesa_bios_load_palette2(int start, int colors, u_char *r, u_char *g, u_char *b,
int bits)
{
x86regs_t regs;
int i;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f09;
/* regs.R_BL = 0; */
regs.R_CX = colors;
regs.R_DX = start;
regs.R_ES = X86BIOS_PHYSTOSEG(vesa_palette_offs);
regs.R_DI = X86BIOS_PHYSTOOFF(vesa_palette_offs);
bits = 8 - bits;
mtx_lock(&vesa_lock);
for (i = 0; i < colors; ++i) {
vesa_palette[i * 4] = b[i] >> bits;
vesa_palette[i * 4 + 1] = g[i] >> bits;
vesa_palette[i * 4 + 2] = r[i] >> bits;
vesa_palette[i * 4 + 3] = 0;
}
x86bios_intr(&regs, 0x10);
mtx_unlock(&vesa_lock);
return (regs.R_AX != 0x004f);
}
static size_t
vesa_bios_state_buf_size(int state)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f04;
/* regs.R_DL = STATE_SIZE; */
regs.R_CX = state;
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f)
return (0);
return (regs.R_BX * 64);
}
static int
vesa_bios_save_restore(int code, void *p)
{
x86regs_t regs;
if (code != STATE_SAVE && code != STATE_LOAD)
return (1);
x86bios_init_regs(&regs);
regs.R_AX = 0x4f04;
regs.R_DL = code;
regs.R_CX = vesa_state;
regs.R_ES = X86BIOS_PHYSTOSEG(vesa_state_buf_offs);
regs.R_BX = X86BIOS_PHYSTOOFF(vesa_state_buf_offs);
mtx_lock(&vesa_lock);
switch (code) {
case STATE_SAVE:
x86bios_intr(&regs, 0x10);
if (regs.R_AX == 0x004f)
bcopy(vesa_state_buf, p, vesa_state_buf_size);
break;
case STATE_LOAD:
bcopy(p, vesa_state_buf, vesa_state_buf_size);
x86bios_intr(&regs, 0x10);
break;
}
mtx_unlock(&vesa_lock);
return (regs.R_AX != 0x004f);
}
#ifdef MODE_TABLE_BROKEN
static int
vesa_bios_get_line_length(void)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f06;
regs.R_BL = 1;
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f)
return (-1);
return (regs.R_BX);
}
#endif
static int
vesa_bios_set_line_length(int pixel, int *bytes, int *lines)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f06;
/* regs.R_BL = 0; */
regs.R_CX = pixel;
x86bios_intr(&regs, 0x10);
#if VESA_DEBUG > 1
printf("bx:%d, cx:%d, dx:%d\n", regs.R_BX, regs.R_CX, regs.R_DX);
#endif
if (regs.R_AX != 0x004f)
return (-1);
if (bytes != NULL)
*bytes = regs.R_BX;
if (lines != NULL)
*lines = regs.R_DX;
return (0);
}
#if 0
static int
vesa_bios_get_start(int *x, int *y)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f07;
regs.R_BL = 1;
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f)
return (-1);
*x = regs.R_CX;
*y = regs.R_DX;
return (0);
}
#endif
static int
vesa_bios_set_start(int x, int y)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f07;
regs.R_BL = 0x80;
regs.R_CX = x;
regs.R_DX = y;
x86bios_intr(&regs, 0x10);
return (regs.R_AX != 0x004f);
}
/* map a generic video mode to a known mode */
static int
vesa_map_gen_mode_num(int type, int color, int mode)
{
static struct {
int from;
int to;
} mode_map[] = {
{ M_TEXT_132x25, M_VESA_C132x25 },
{ M_TEXT_132x43, M_VESA_C132x43 },
{ M_TEXT_132x50, M_VESA_C132x50 },
{ M_TEXT_132x60, M_VESA_C132x60 },
};
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);
}
static int
vesa_translate_flags(u_int16_t vflags)
{
static struct {
u_int16_t mask;
int set;
int reset;
} ftable[] = {
{ V_MODECOLOR, V_INFO_COLOR, 0 },
{ V_MODEGRAPHICS, V_INFO_GRAPHICS, 0 },
{ V_MODELFB, V_INFO_LINEAR, 0 },
{ V_MODENONVGA, V_INFO_NONVGA, 0 },
};
int flags;
int i;
for (flags = 0, i = 0; i < sizeof(ftable)/sizeof(ftable[0]); ++i) {
flags |= (vflags & ftable[i].mask) ?
ftable[i].set : ftable[i].reset;
}
return (flags);
}
static int
vesa_translate_mmodel(u_int8_t vmodel)
{
static struct {
u_int8_t vmodel;
int mmodel;
} mtable[] = {
{ V_MMTEXT, V_INFO_MM_TEXT },
{ V_MMCGA, V_INFO_MM_CGA },
{ V_MMHGC, V_INFO_MM_HGC },
{ V_MMEGA, V_INFO_MM_PLANAR },
{ V_MMPACKED, V_INFO_MM_PACKED },
{ V_MMDIRCOLOR, V_INFO_MM_DIRECT },
};
int i;
for (i = 0; mtable[i].mmodel >= 0; ++i) {
if (mtable[i].vmodel == vmodel)
return (mtable[i].mmodel);
}
return (V_INFO_MM_OTHER);
}
static int
vesa_get_bpscanline(struct vesa_mode *vmode)
{
int bpsl;
if ((vmode->v_modeattr & V_MODEGRAPHICS) != 0) {
/* Find the minimum length. */
switch (vmode->v_bpp / vmode->v_planes) {
case 1:
bpsl = vmode->v_width / 8;
break;
case 2:
bpsl = vmode->v_width / 4;
break;
case 4:
bpsl = vmode->v_width / 2;
break;
default:
bpsl = vmode->v_width * ((vmode->v_bpp + 7) / 8);
bpsl /= vmode->v_planes;
break;
}
/* Use VBE 3.0 information if it looks sane. */
if ((vmode->v_modeattr & V_MODELFB) != 0 &&
vesa_adp_info->v_version >= 0x0300 &&
vmode->v_linbpscanline > bpsl)
return (vmode->v_linbpscanline);
/* Return the minimum if the mode table looks absurd. */
if (vmode->v_bpscanline < bpsl)
return (bpsl);
}
return (vmode->v_bpscanline);
}
#define VESA_MAXSTR 256
#define VESA_STRCPY(dst, src) do { \
char *str; \
int i; \
dst = malloc(VESA_MAXSTR, M_DEVBUF, M_WAITOK); \
str = x86bios_offset(BIOS_SADDRTOLADDR(src)); \
for (i = 0; i < VESA_MAXSTR - 1 && str[i] != '\0'; i++) \
dst[i] = str[i]; \
dst[i] = '\0'; \
} while (0)
static int
vesa_bios_init(void)
{
struct vesa_mode vmode;
struct vesa_info *buf;
video_info_t *p;
x86regs_t regs;
size_t bsize;
size_t msize;
void *vmbuf;
uint8_t *vbios;
uint32_t offs;
uint16_t vers;
int is_via_cle266;
int modes;
int i;
if (vesa_init_done)
return (0);
vesa_bios_offs = VESA_BIOS_OFFSET;
/*
* If the VBE real mode interrupt vector is not found, try BIOS POST.
*/
vesa_bios_int10 = x86bios_get_intr(0x10);
if (vesa_bios_int10 == 0) {
if (vesa_bios_post() != 0)
return (1);
vesa_bios_int10 = x86bios_get_intr(0x10);
if (vesa_bios_int10 == 0)
return (1);
}
/*
* Shadow video ROM.
*/
offs = vesa_bios_int10;
if (vesa_shadow_rom) {
vbios = x86bios_get_orm(vesa_bios_offs);
if (vbios != NULL) {
vesa_bios_size = vbios[2] * 512;
if (((VESA_BIOS_OFFSET << 12) & 0xffff0000) ==
(vesa_bios_int10 & 0xffff0000) &&
vesa_bios_size > (vesa_bios_int10 & 0xffff)) {
vesa_bios = x86bios_alloc(&vesa_bios_offs,
vesa_bios_size, M_WAITOK);
bcopy(vbios, vesa_bios, vesa_bios_size);
offs = ((vesa_bios_offs << 12) & 0xffff0000) +
(vesa_bios_int10 & 0xffff);
x86bios_set_intr(0x10, offs);
}
}
if (vesa_bios == NULL)
printf("VESA: failed to shadow video ROM\n");
}
if (bootverbose)
printf("VESA: INT 0x10 vector 0x%04x:0x%04x\n",
(offs >> 16) & 0xffff, offs & 0xffff);
x86bios_init_regs(&regs);
regs.R_AX = 0x4f00;
vmbuf = x86bios_alloc(&offs, sizeof(*buf), M_WAITOK);
regs.R_ES = X86BIOS_PHYSTOSEG(offs);
regs.R_DI = X86BIOS_PHYSTOOFF(offs);
bcopy("VBE2", vmbuf, 4); /* try for VBE2 data */
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f || bcmp("VESA", vmbuf, 4) != 0)
goto fail;
vesa_adp_info = buf = malloc(sizeof(*buf), M_DEVBUF, M_WAITOK);
bcopy(vmbuf, buf, sizeof(*buf));
if (bootverbose) {
printf("VESA: information block\n");
hexdump(buf, sizeof(*buf), NULL, HD_OMIT_CHARS);
}
vers = buf->v_version = le16toh(buf->v_version);
buf->v_oemstr = le32toh(buf->v_oemstr);
buf->v_flags = le32toh(buf->v_flags);
buf->v_modetable = le32toh(buf->v_modetable);
buf->v_memsize = le16toh(buf->v_memsize);
buf->v_revision = le16toh(buf->v_revision);
buf->v_venderstr = le32toh(buf->v_venderstr);
buf->v_prodstr = le32toh(buf->v_prodstr);
buf->v_revstr = le32toh(buf->v_revstr);
if (vers < 0x0102) {
printf("VESA: VBE version %d.%d is not supported; "
"version 1.2 or later is required.\n",
((vers & 0xf000) >> 12) * 10 + ((vers & 0x0f00) >> 8),
((vers & 0x00f0) >> 4) * 10 + (vers & 0x000f));
goto fail;
}
VESA_STRCPY(vesa_oemstr, buf->v_oemstr);
if (vers >= 0x0200) {
VESA_STRCPY(vesa_venderstr, buf->v_venderstr);
VESA_STRCPY(vesa_prodstr, buf->v_prodstr);
VESA_STRCPY(vesa_revstr, buf->v_revstr);
}
is_via_cle266 = strncmp(vesa_oemstr, VESA_VIA_CLE266,
sizeof(VESA_VIA_CLE266)) == 0;
if (buf->v_modetable == 0)
goto fail;
msize = (size_t)buf->v_memsize * 64 * 1024;
vesa_vmodetab = x86bios_offset(BIOS_SADDRTOLADDR(buf->v_modetable));
for (i = 0, modes = 0; (i < (M_VESA_MODE_MAX - M_VESA_BASE + 1)) &&
(vesa_vmodetab[i] != 0xffff); ++i) {
vesa_vmodetab[i] = le16toh(vesa_vmodetab[i]);
if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode, M_WAITOK))
continue;
vmode.v_modeattr = le16toh(vmode.v_modeattr);
vmode.v_wgran = le16toh(vmode.v_wgran);
vmode.v_wsize = le16toh(vmode.v_wsize);
vmode.v_waseg = le16toh(vmode.v_waseg);
vmode.v_wbseg = le16toh(vmode.v_wbseg);
vmode.v_posfunc = le32toh(vmode.v_posfunc);
vmode.v_bpscanline = le16toh(vmode.v_bpscanline);
vmode.v_width = le16toh(vmode.v_width);
vmode.v_height = le16toh(vmode.v_height);
vmode.v_lfb = le32toh(vmode.v_lfb);
vmode.v_offscreen = le32toh(vmode.v_offscreen);
vmode.v_offscreensize = le16toh(vmode.v_offscreensize);
vmode.v_linbpscanline = le16toh(vmode.v_linbpscanline);
vmode.v_maxpixelclock = le32toh(vmode.v_maxpixelclock);
/* reject unsupported modes */
#if 0
if ((vmode.v_modeattr &
(V_MODESUPP | V_MODEOPTINFO | V_MODENONVGA)) !=
(V_MODESUPP | V_MODEOPTINFO))
continue;
#else
if ((vmode.v_modeattr & V_MODEOPTINFO) == 0) {
#if VESA_DEBUG > 1
printf("Rejecting VESA %s mode: %d x %d x %d bpp "
" attr = %x\n",
vmode.v_modeattr & V_MODEGRAPHICS ?
"graphics" : "text",
vmode.v_width, vmode.v_height, vmode.v_bpp,
vmode.v_modeattr);
#endif
continue;
}
#endif
bsize = vesa_get_bpscanline(&vmode) * vmode.v_height;
if ((vmode.v_modeattr & V_MODEGRAPHICS) != 0)
bsize *= vmode.v_planes;
/* Does it have enough memory to support this mode? */
if (msize < bsize) {
#if VESA_DEBUG > 1
printf("Rejecting VESA %s mode: %d x %d x %d bpp "
" attr = %x, not enough memory\n",
vmode.v_modeattr & V_MODEGRAPHICS ?
"graphics" : "text",
vmode.v_width, vmode.v_height, vmode.v_bpp,
vmode.v_modeattr);
#endif
continue;
}
if (bsize > vesa_vmem_max)
vesa_vmem_max = bsize;
/* expand the array if necessary */
if (modes >= vesa_vmode_max) {
vesa_vmode_max += MODE_TABLE_DELTA;
p = malloc(sizeof(*vesa_vmode) * (vesa_vmode_max + 1),
M_DEVBUF, M_WAITOK);
#if VESA_DEBUG > 1
printf("vesa_bios_init(): modes:%d, vesa_mode_max:%d\n",
modes, vesa_vmode_max);
#endif
if (modes > 0) {
bcopy(vesa_vmode, p, sizeof(*vesa_vmode)*modes);
free(vesa_vmode, M_DEVBUF);
}
vesa_vmode = p;
}
#if VESA_DEBUG > 1
printf("Found VESA %s mode: %d x %d x %d bpp\n",
vmode.v_modeattr & V_MODEGRAPHICS ? "graphics" : "text",
vmode.v_width, vmode.v_height, vmode.v_bpp);
#endif
if (is_via_cle266) {
if ((vmode.v_width & 0xff00) >> 8 == vmode.v_height - 1) {
vmode.v_width &= 0xff;
vmode.v_waseg = 0xb8000 >> 4;
}
}
/* copy some fields */
bzero(&vesa_vmode[modes], sizeof(vesa_vmode[modes]));
vesa_vmode[modes].vi_mode = vesa_vmodetab[i];
vesa_vmode[modes].vi_width = vmode.v_width;
vesa_vmode[modes].vi_height = vmode.v_height;
vesa_vmode[modes].vi_depth = vmode.v_bpp;
vesa_vmode[modes].vi_planes = vmode.v_planes;
vesa_vmode[modes].vi_cwidth = vmode.v_cwidth;
vesa_vmode[modes].vi_cheight = vmode.v_cheight;
vesa_vmode[modes].vi_window = (vm_offset_t)vmode.v_waseg << 4;
/* XXX window B */
vesa_vmode[modes].vi_window_size = vmode.v_wsize * 1024;
vesa_vmode[modes].vi_window_gran = vmode.v_wgran * 1024;
if (vmode.v_modeattr & V_MODELFB)
vesa_vmode[modes].vi_buffer = vmode.v_lfb;
vesa_vmode[modes].vi_buffer_size = bsize;
vesa_vmode[modes].vi_mem_model =
vesa_translate_mmodel(vmode.v_memmodel);
switch (vesa_vmode[modes].vi_mem_model) {
case V_INFO_MM_DIRECT:
if ((vmode.v_modeattr & V_MODELFB) != 0 &&
vers >= 0x0300) {
vesa_vmode[modes].vi_pixel_fields[0] =
vmode.v_linredfieldpos;
vesa_vmode[modes].vi_pixel_fields[1] =
vmode.v_lingreenfieldpos;
vesa_vmode[modes].vi_pixel_fields[2] =
vmode.v_linbluefieldpos;
vesa_vmode[modes].vi_pixel_fields[3] =
vmode.v_linresfieldpos;
vesa_vmode[modes].vi_pixel_fsizes[0] =
vmode.v_linredmasksize;
vesa_vmode[modes].vi_pixel_fsizes[1] =
vmode.v_lingreenmasksize;
vesa_vmode[modes].vi_pixel_fsizes[2] =
vmode.v_linbluemasksize;
vesa_vmode[modes].vi_pixel_fsizes[3] =
vmode.v_linresmasksize;
} else {
vesa_vmode[modes].vi_pixel_fields[0] =
vmode.v_redfieldpos;
vesa_vmode[modes].vi_pixel_fields[1] =
vmode.v_greenfieldpos;
vesa_vmode[modes].vi_pixel_fields[2] =
vmode.v_bluefieldpos;
vesa_vmode[modes].vi_pixel_fields[3] =
vmode.v_resfieldpos;
vesa_vmode[modes].vi_pixel_fsizes[0] =
vmode.v_redmasksize;
vesa_vmode[modes].vi_pixel_fsizes[1] =
vmode.v_greenmasksize;
vesa_vmode[modes].vi_pixel_fsizes[2] =
vmode.v_bluemasksize;
vesa_vmode[modes].vi_pixel_fsizes[3] =
vmode.v_resmasksize;
}
/* FALLTHROUGH */
case V_INFO_MM_PACKED:
vesa_vmode[modes].vi_pixel_size = (vmode.v_bpp + 7) / 8;
break;
}
vesa_vmode[modes].vi_flags =
vesa_translate_flags(vmode.v_modeattr) | V_INFO_VESA;
++modes;
}
vesa_vmode[modes].vi_mode = EOT;
if (bootverbose)
printf("VESA: %d mode(s) found\n", modes);
if (modes == 0)
goto fail;
x86bios_free(vmbuf, sizeof(*buf));
/* Probe supported save/restore states. */
for (i = 0; i < 4; i++)
if (vesa_bios_state_buf_size(1 << i) > 0)
vesa_state |= 1 << i;
if (vesa_state != 0)
vesa_state_buf_size = vesa_bios_state_buf_size(vesa_state);
vesa_palette = x86bios_alloc(&vesa_palette_offs,
VESA_PALETTE_SIZE + vesa_state_buf_size, M_WAITOK);
if (vesa_state_buf_size > 0) {
vesa_state_buf = vesa_palette + VESA_PALETTE_SIZE;
vesa_state_buf_offs = vesa_palette_offs + VESA_PALETTE_SIZE;
}
return (0);
fail:
x86bios_free(vmbuf, sizeof(buf));
vesa_bios_uninit();
return (1);
}
static void
vesa_bios_uninit(void)
{
if (vesa_bios != NULL) {
x86bios_set_intr(0x10, vesa_bios_int10);
vesa_bios_offs = VESA_BIOS_OFFSET;
x86bios_free(vesa_bios, vesa_bios_size);
vesa_bios = NULL;
}
if (vesa_adp_info != NULL) {
free(vesa_adp_info, M_DEVBUF);
vesa_adp_info = NULL;
}
if (vesa_oemstr != NULL) {
free(vesa_oemstr, M_DEVBUF);
vesa_oemstr = NULL;
}
if (vesa_venderstr != NULL) {
free(vesa_venderstr, M_DEVBUF);
vesa_venderstr = NULL;
}
if (vesa_prodstr != NULL) {
free(vesa_prodstr, M_DEVBUF);
vesa_prodstr = NULL;
}
if (vesa_revstr != NULL) {
free(vesa_revstr, M_DEVBUF);
vesa_revstr = NULL;
}
if (vesa_vmode != NULL) {
free(vesa_vmode, M_DEVBUF);
vesa_vmode = NULL;
}
if (vesa_palette != NULL) {
x86bios_free(vesa_palette,
VESA_PALETTE_SIZE + vesa_state_buf_size);
vesa_palette = NULL;
}
}
static void
vesa_clear_modes(video_info_t *info, int color)
{
while (info->vi_mode != EOT) {
if ((info->vi_flags & V_INFO_COLOR) != color)
info->vi_mode = NA;
++info;
}
}
/* entry points */
static int
vesa_configure(int flags)
{
video_adapter_t *adp;
int adapters;
int error;
int i;
if (vesa_init_done)
return (0);
if (flags & VIO_PROBE_ONLY)
return (0);
/*
* If the VESA module has already been loaded, abort loading
* the module this time.
*/
for (i = 0; (adp = vid_get_adapter(i)) != NULL; ++i) {
if (adp->va_flags & V_ADP_VESA)
return (ENXIO);
if (adp->va_type == KD_VGA)
break;
}
/*
* The VGA adapter is not found. This is because either
* 1) the VGA driver has not been initialized, or 2) the VGA card
* is not present. If 1) is the case, we shall defer
* initialization for now and try again later.
*/
if (adp == NULL) {
vga_sub_configure = vesa_configure;
return (ENODEV);
}
/* count number of registered adapters */
for (++i; vid_get_adapter(i) != NULL; ++i)
;
adapters = i;
/* call VESA BIOS */
vesa_adp = adp;
if (vesa_bios_init()) {
vesa_adp = NULL;
return (ENXIO);
}
vesa_adp->va_flags |= V_ADP_VESA;
/* remove conflicting modes if we have more than one adapter */
if (adapters > 1) {
vesa_clear_modes(vesa_vmode,
(vesa_adp->va_flags & V_ADP_COLOR) ?
V_INFO_COLOR : 0);
}
if ((error = vesa_load_ioctl()) == 0) {
prevvidsw = vidsw[vesa_adp->va_index];
vidsw[vesa_adp->va_index] = &vesavidsw;
vesa_init_done = TRUE;
} else {
vesa_adp = NULL;
return (error);
}
return (0);
}
#if 0
static int
vesa_nop(void)
{
return (0);
}
#endif
static int
vesa_error(void)
{
return (1);
}
static int
vesa_probe(int unit, video_adapter_t **adpp, void *arg, int flags)
{
return ((*prevvidsw->probe)(unit, adpp, arg, flags));
}
static int
vesa_init(int unit, video_adapter_t *adp, int flags)
{
return ((*prevvidsw->init)(unit, adp, flags));
}
static int
vesa_get_info(video_adapter_t *adp, int mode, video_info_t *info)
{
int i;
if ((*prevvidsw->get_info)(adp, mode, info) == 0)
return (0);
if (adp != vesa_adp)
return (1);
mode = vesa_map_gen_mode_num(vesa_adp->va_type,
vesa_adp->va_flags & V_ADP_COLOR, mode);
for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
if (vesa_vmode[i].vi_mode == NA)
continue;
if (vesa_vmode[i].vi_mode == mode) {
*info = vesa_vmode[i];
return (0);
}
}
return (1);
}
static int
vesa_query_mode(video_adapter_t *adp, video_info_t *info)
{
int i;
if ((*prevvidsw->query_mode)(adp, info) == 0)
return (0);
if (adp != vesa_adp)
return (ENODEV);
for (i = 0; vesa_vmode[i].vi_mode != EOT; ++i) {
if ((info->vi_width != 0)
&& (info->vi_width != vesa_vmode[i].vi_width))
continue;
if ((info->vi_height != 0)
&& (info->vi_height != vesa_vmode[i].vi_height))
continue;
if ((info->vi_cwidth != 0)
&& (info->vi_cwidth != vesa_vmode[i].vi_cwidth))
continue;
if ((info->vi_cheight != 0)
&& (info->vi_cheight != vesa_vmode[i].vi_cheight))
continue;
if ((info->vi_depth != 0)
&& (info->vi_depth != vesa_vmode[i].vi_depth))
continue;
if ((info->vi_planes != 0)
&& (info->vi_planes != vesa_vmode[i].vi_planes))
continue;
/* pixel format, memory model */
if ((info->vi_flags != 0)
&& (info->vi_flags != vesa_vmode[i].vi_flags))
continue;
*info = vesa_vmode[i];
return (0);
}
return (ENODEV);
}
static int
vesa_set_mode(video_adapter_t *adp, int mode)
{
video_info_t info;
if (adp != vesa_adp)
return ((*prevvidsw->set_mode)(adp, mode));
mode = vesa_map_gen_mode_num(adp->va_type,
adp->va_flags & V_ADP_COLOR, mode);
#if VESA_DEBUG > 0
printf("VESA: set_mode(): %d(%x) -> %d(%x)\n",
adp->va_mode, adp->va_mode, mode, mode);
#endif
/*
* If the current mode is a VESA mode and the new mode is not,
* restore the state of the adapter first by setting one of the
* standard VGA mode, so that non-standard, extended SVGA registers
* are set to the state compatible with the standard VGA modes.
* Otherwise (*prevvidsw->set_mode)() may not be able to set up
* the new mode correctly.
*/
if (VESA_MODE(adp->va_mode)) {
if (!VESA_MODE(mode) &&
(*prevvidsw->get_info)(adp, mode, &info) == 0) {
if ((adp->va_flags & V_ADP_DAC8) != 0) {
vesa_bios_set_dac(6);
adp->va_flags &= ~V_ADP_DAC8;
}
int10_set_mode(adp->va_initial_bios_mode);
if (adp->va_info.vi_flags & V_INFO_LINEAR)
pmap_unmapdev(adp->va_buffer, vesa_vmem_max);
/*
* Once (*prevvidsw->get_info)() succeeded,
* (*prevvidsw->set_mode)() below won't fail...
*/
}
}
/* we may not need to handle this mode after all... */
if (!VESA_MODE(mode) && (*prevvidsw->set_mode)(adp, mode) == 0)
return (0);
/* is the new mode supported? */
if (vesa_get_info(adp, mode, &info))
return (1);
/* assert(VESA_MODE(mode)); */
#if VESA_DEBUG > 0
printf("VESA: about to set a VESA mode...\n");
#endif
/* don't use the linear frame buffer for text modes. XXX */
if (!(info.vi_flags & V_INFO_GRAPHICS))
info.vi_flags &= ~V_INFO_LINEAR;
if ((info.vi_flags & V_INFO_LINEAR) != 0)
mode |= 0x4000;
if (vesa_bios_set_mode(mode | 0x8000))
return (1);
/* Palette format is reset by the above VBE function call. */
adp->va_flags &= ~V_ADP_DAC8;
if ((vesa_adp_info->v_flags & V_DAC8) != 0 &&
(info.vi_flags & V_INFO_GRAPHICS) != 0 &&
vesa_bios_set_dac(8) > 6)
adp->va_flags |= V_ADP_DAC8;
if (adp->va_info.vi_flags & V_INFO_LINEAR)
pmap_unmapdev(adp->va_buffer, vesa_vmem_max);
#if VESA_DEBUG > 0
printf("VESA: mode set!\n");
#endif
vesa_adp->va_mode = mode & 0x1ff; /* Mode number is 9-bit. */
vesa_adp->va_flags &= ~V_ADP_COLOR;
vesa_adp->va_flags |=
(info.vi_flags & V_INFO_COLOR) ? V_ADP_COLOR : 0;
vesa_adp->va_crtc_addr =
(vesa_adp->va_flags & V_ADP_COLOR) ? COLOR_CRTC : MONO_CRTC;
vesa_adp->va_line_width = info.vi_buffer_size / info.vi_height;
if ((info.vi_flags & V_INFO_GRAPHICS) != 0)
vesa_adp->va_line_width /= info.vi_planes;
#ifdef MODE_TABLE_BROKEN
/* If VBE function returns bigger bytes per scan line, use it. */
{
int bpsl = vesa_bios_get_line_length();
if (bpsl > vesa_adp->va_line_width) {
vesa_adp->va_line_width = bpsl;
info.vi_buffer_size = bpsl * info.vi_height;
if ((info.vi_flags & V_INFO_GRAPHICS) != 0)
info.vi_buffer_size *= info.vi_planes;
}
}
#endif
if (info.vi_flags & V_INFO_LINEAR) {
#if VESA_DEBUG > 1
printf("VESA: setting up LFB\n");
#endif
vesa_adp->va_buffer =
(vm_offset_t)pmap_mapdev_attr(info.vi_buffer,
vesa_vmem_max, PAT_WRITE_COMBINING);
vesa_adp->va_window = vesa_adp->va_buffer;
vesa_adp->va_window_size = info.vi_buffer_size / info.vi_planes;
vesa_adp->va_window_gran = info.vi_buffer_size / info.vi_planes;
} else {
vesa_adp->va_buffer = 0;
vesa_adp->va_window = (vm_offset_t)x86bios_offset(info.vi_window);
vesa_adp->va_window_size = info.vi_window_size;
vesa_adp->va_window_gran = info.vi_window_gran;
}
vesa_adp->va_buffer_size = info.vi_buffer_size;
vesa_adp->va_window_orig = 0;
vesa_adp->va_disp_start.x = 0;
vesa_adp->va_disp_start.y = 0;
#if VESA_DEBUG > 0
printf("vesa_set_mode(): vi_width:%d, line_width:%d\n",
info.vi_width, vesa_adp->va_line_width);
#endif
bcopy(&info, &vesa_adp->va_info, sizeof(vesa_adp->va_info));
/* move hardware cursor out of the way */
(*vidsw[vesa_adp->va_index]->set_hw_cursor)(vesa_adp, -1, -1);
return (0);
}
static int
vesa_save_font(video_adapter_t *adp, int page, int fontsize, int fontwidth,
u_char *data, int ch, int count)
{
return ((*prevvidsw->save_font)(adp, page, fontsize, fontwidth, data,
ch, count));
}
static int
vesa_load_font(video_adapter_t *adp, int page, int fontsize, int fontwidth,
u_char *data, int ch, int count)
{
return ((*prevvidsw->load_font)(adp, page, fontsize, fontwidth, data,
ch, count));
}
static int
vesa_show_font(video_adapter_t *adp, int page)
{
return ((*prevvidsw->show_font)(adp, page));
}
static int
vesa_save_palette(video_adapter_t *adp, u_char *palette)
{
int bits;
if (adp == vesa_adp && VESA_MODE(adp->va_mode)) {
bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
if (vesa_bios_save_palette(0, 256, palette, bits) == 0)
return (0);
}
return ((*prevvidsw->save_palette)(adp, palette));
}
static int
vesa_load_palette(video_adapter_t *adp, u_char *palette)
{
int bits;
if (adp == vesa_adp && VESA_MODE(adp->va_mode)) {
bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
if (vesa_bios_load_palette(0, 256, palette, bits) == 0)
return (0);
}
return ((*prevvidsw->load_palette)(adp, palette));
}
static int
vesa_set_border(video_adapter_t *adp, int color)
{
return ((*prevvidsw->set_border)(adp, color));
}
static int
vesa_save_state(video_adapter_t *adp, void *p, size_t size)
{
void *buf;
size_t bsize;
if (adp != vesa_adp || (size == 0 && vesa_state_buf_size == 0))
return ((*prevvidsw->save_state)(adp, p, size));
bsize = offsetof(adp_state_t, regs) + vesa_state_buf_size;
if (size == 0)
return (bsize);
if (vesa_state_buf_size > 0 && size < bsize)
return (EINVAL);
if (vesa_vmem_buf != NULL) {
free(vesa_vmem_buf, M_DEVBUF);
vesa_vmem_buf = NULL;
}
if (VESA_MODE(adp->va_mode)) {
buf = (void *)adp->va_buffer;
if (buf != NULL) {
bsize = adp->va_buffer_size;
vesa_vmem_buf = malloc(bsize, M_DEVBUF, M_NOWAIT);
if (vesa_vmem_buf != NULL)
bcopy(buf, vesa_vmem_buf, bsize);
}
}
if (vesa_state_buf_size == 0)
return ((*prevvidsw->save_state)(adp, p, size));
((adp_state_t *)p)->sig = V_STATE_SIG;
return (vesa_bios_save_restore(STATE_SAVE, ((adp_state_t *)p)->regs));
}
static int
vesa_load_state(video_adapter_t *adp, void *p)
{
void *buf;
size_t bsize;
int error, mode;
if (adp != vesa_adp)
return ((*prevvidsw->load_state)(adp, p));
/* Try BIOS POST to restore a sane state. */
(void)vesa_bios_post();
bsize = adp->va_buffer_size;
mode = adp->va_mode;
error = vesa_set_mode(adp, adp->va_initial_mode);
if (mode != adp->va_initial_mode)
error = vesa_set_mode(adp, mode);
if (vesa_vmem_buf != NULL) {
if (error == 0 && VESA_MODE(mode)) {
buf = (void *)adp->va_buffer;
if (buf != NULL)
bcopy(vesa_vmem_buf, buf, bsize);
}
free(vesa_vmem_buf, M_DEVBUF);
vesa_vmem_buf = NULL;
}
if (((adp_state_t *)p)->sig != V_STATE_SIG)
return ((*prevvidsw->load_state)(adp, p));
return (vesa_bios_save_restore(STATE_LOAD, ((adp_state_t *)p)->regs));
}
#if 0
static int
vesa_get_origin(video_adapter_t *adp, off_t *offset)
{
x86regs_t regs;
x86bios_init_regs(&regs);
regs.R_AX = 0x4f05;
regs.R_BL = 0x10;
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f)
return (1);
*offset = regs.DX * adp->va_window_gran;
return (0);
}
#endif
static int
vesa_set_origin(video_adapter_t *adp, off_t offset)
{
x86regs_t regs;
/*
* This function should return as quickly as possible to
* maintain good performance of the system. For this reason,
* error checking is kept minimal and let the VESA BIOS to
* detect error.
*/
if (adp != vesa_adp)
return ((*prevvidsw->set_win_org)(adp, offset));
/* if this is a linear frame buffer, do nothing */
if (adp->va_info.vi_flags & V_INFO_LINEAR)
return (0);
/* XXX */
if (adp->va_window_gran == 0)
return (1);
x86bios_init_regs(&regs);
regs.R_AX = 0x4f05;
regs.R_DX = offset / adp->va_window_gran;
x86bios_intr(&regs, 0x10);
if (regs.R_AX != 0x004f)
return (1);
x86bios_init_regs(&regs);
regs.R_AX = 0x4f05;
regs.R_BL = 1;
regs.R_DX = offset / adp->va_window_gran;
x86bios_intr(&regs, 0x10);
adp->va_window_orig = (offset/adp->va_window_gran)*adp->va_window_gran;
return (0); /* XXX */
}
static int
vesa_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
{
return ((*prevvidsw->read_hw_cursor)(adp, col, row));
}
static int
vesa_set_hw_cursor(video_adapter_t *adp, int col, int row)
{
return ((*prevvidsw->set_hw_cursor)(adp, col, row));
}
static int
vesa_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
int celsize, int blink)
{
return ((*prevvidsw->set_hw_cursor_shape)(adp, base, height, celsize,
blink));
}
static int
vesa_blank_display(video_adapter_t *adp, int mode)
{
/* XXX: use VESA DPMS */
return ((*prevvidsw->blank_display)(adp, mode));
}
static int
vesa_mmap(video_adapter_t *adp, vm_ooffset_t offset, vm_paddr_t *paddr,
int prot, vm_memattr_t *memattr)
{
#if VESA_DEBUG > 0
printf("vesa_mmap(): window:0x%tx, buffer:0x%tx, offset:0x%jx\n",
adp->va_info.vi_window, adp->va_info.vi_buffer, offset);
#endif
if ((adp == vesa_adp) &&
(adp->va_info.vi_flags & V_INFO_LINEAR) != 0) {
/* va_window_size == va_buffer_size/vi_planes */
/* XXX: is this correct? */
if (offset > adp->va_window_size - PAGE_SIZE)
return (-1);
*paddr = adp->va_info.vi_buffer + offset;
return (0);
}
return ((*prevvidsw->mmap)(adp, offset, paddr, prot, memattr));
}
static int
vesa_clear(video_adapter_t *adp)
{
return ((*prevvidsw->clear)(adp));
}
static int
vesa_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
{
return ((*prevvidsw->fill_rect)(adp, val, x, y, cx, cy));
}
static int
vesa_bitblt(video_adapter_t *adp,...)
{
/* FIXME */
return (1);
}
static int
get_palette(video_adapter_t *adp, int base, int count,
u_char *red, u_char *green, u_char *blue, u_char *trans)
{
u_char *r;
u_char *g;
u_char *b;
int bits;
int error;
if (base < 0 || base >= 256 || count < 0 || count > 256)
return (1);
if ((base + count) > 256)
return (1);
if (!VESA_MODE(adp->va_mode))
return (1);
bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
r = malloc(count * 3, M_DEVBUF, M_WAITOK);
g = r + count;
b = g + count;
error = vesa_bios_save_palette2(base, count, r, g, b, bits);
if (error == 0) {
copyout(r, red, count);
copyout(g, green, count);
copyout(b, blue, count);
if (trans != NULL) {
bzero(r, count);
copyout(r, trans, count);
}
}
free(r, M_DEVBUF);
return (error);
}
static int
set_palette(video_adapter_t *adp, int base, int count,
u_char *red, u_char *green, u_char *blue, u_char *trans)
{
u_char *r;
u_char *g;
u_char *b;
int bits;
int error;
if (base < 0 || base >= 256 || count < 0 || count > 256)
return (1);
if ((base + count) > 256)
return (1);
if (!VESA_MODE(adp->va_mode))
return (1);
bits = (adp->va_flags & V_ADP_DAC8) != 0 ? 8 : 6;
r = malloc(count * 3, M_DEVBUF, M_WAITOK);
g = r + count;
b = g + count;
copyin(red, r, count);
copyin(green, g, count);
copyin(blue, b, count);
error = vesa_bios_load_palette2(base, count, r, g, b, bits);
free(r, M_DEVBUF);
return (error);
}
static int
vesa_ioctl(video_adapter_t *adp, u_long cmd, caddr_t arg)
{
int bytes;
if (adp != vesa_adp)
return ((*prevvidsw->ioctl)(adp, cmd, arg));
switch (cmd) {
case FBIO_SETWINORG: /* set frame buffer window origin */
if (!VESA_MODE(adp->va_mode))
return (*prevvidsw->ioctl)(adp, cmd, arg);
return (vesa_set_origin(adp, *(off_t *)arg) ? ENODEV : 0);
case FBIO_SETDISPSTART: /* set display start address */
if (!VESA_MODE(adp->va_mode))
return ((*prevvidsw->ioctl)(adp, cmd, arg));
if (vesa_bios_set_start(((video_display_start_t *)arg)->x,
((video_display_start_t *)arg)->y))
return (ENODEV);
adp->va_disp_start.x = ((video_display_start_t *)arg)->x;
adp->va_disp_start.y = ((video_display_start_t *)arg)->y;
return (0);
case FBIO_SETLINEWIDTH: /* set line length in pixel */
if (!VESA_MODE(adp->va_mode))
return ((*prevvidsw->ioctl)(adp, cmd, arg));
if (vesa_bios_set_line_length(*(u_int *)arg, &bytes, NULL))
return (ENODEV);
adp->va_line_width = bytes;
#if VESA_DEBUG > 1
printf("new line width:%d\n", adp->va_line_width);
#endif
return (0);
case FBIO_GETPALETTE: /* get color palette */
if (get_palette(adp, ((video_color_palette_t *)arg)->index,
((video_color_palette_t *)arg)->count,
((video_color_palette_t *)arg)->red,
((video_color_palette_t *)arg)->green,
((video_color_palette_t *)arg)->blue,
((video_color_palette_t *)arg)->transparent))
return ((*prevvidsw->ioctl)(adp, cmd, arg));
return (0);
case FBIO_SETPALETTE: /* set color palette */
if (set_palette(adp, ((video_color_palette_t *)arg)->index,
((video_color_palette_t *)arg)->count,
((video_color_palette_t *)arg)->red,
((video_color_palette_t *)arg)->green,
((video_color_palette_t *)arg)->blue,
((video_color_palette_t *)arg)->transparent))
return ((*prevvidsw->ioctl)(adp, cmd, arg));
return (0);
case FBIOGETCMAP: /* get color palette */
if (get_palette(adp, ((struct fbcmap *)arg)->index,
((struct fbcmap *)arg)->count,
((struct fbcmap *)arg)->red,
((struct fbcmap *)arg)->green,
((struct fbcmap *)arg)->blue, NULL))
return ((*prevvidsw->ioctl)(adp, cmd, arg));
return (0);
case FBIOPUTCMAP: /* set color palette */
if (set_palette(adp, ((struct fbcmap *)arg)->index,
((struct fbcmap *)arg)->count,
((struct fbcmap *)arg)->red,
((struct fbcmap *)arg)->green,
((struct fbcmap *)arg)->blue, NULL))
return ((*prevvidsw->ioctl)(adp, cmd, arg));
return (0);
default:
return ((*prevvidsw->ioctl)(adp, cmd, arg));
}
}
static int
vesa_diag(video_adapter_t *adp, int level)
{
int error;
/* call the previous handler first */
error = (*prevvidsw->diag)(adp, level);
if (error)
return (error);
if (adp != vesa_adp)
return (1);
if (level <= 0)
return (0);
return (0);
}
static int
vesa_bios_info(int level)
{
#if VESA_DEBUG > 1
struct vesa_mode vmode;
int i;
#endif
uint16_t vers;
vers = vesa_adp_info->v_version;
if (bootverbose) {
/* general adapter information */
printf(
"VESA: v%d.%d, %dk memory, flags:0x%x, mode table:%p (%x)\n",
(vers >> 12) * 10 + ((vers & 0x0f00) >> 8),
((vers & 0x00f0) >> 4) * 10 + (vers & 0x000f),
vesa_adp_info->v_memsize * 64, vesa_adp_info->v_flags,
vesa_vmodetab, vesa_adp_info->v_modetable);
/* OEM string */
if (vesa_oemstr != NULL)
printf("VESA: %s\n", vesa_oemstr);
}
if (level <= 0)
return (0);
if (vers >= 0x0200 && bootverbose) {
/* vender name, product name, product revision */
printf("VESA: %s %s %s\n",
(vesa_venderstr != NULL) ? vesa_venderstr : "unknown",
(vesa_prodstr != NULL) ? vesa_prodstr : "unknown",
(vesa_revstr != NULL) ? vesa_revstr : "?");
}
#if VESA_DEBUG > 1
/* mode information */
for (i = 0;
(i < (M_VESA_MODE_MAX - M_VESA_BASE + 1))
&& (vesa_vmodetab[i] != 0xffff); ++i) {
if (vesa_bios_get_mode(vesa_vmodetab[i], &vmode, M_NOWAIT))
continue;
/* print something for diagnostic purpose */
printf("VESA: mode:0x%03x, flags:0x%04x",
vesa_vmodetab[i], vmode.v_modeattr);
if (vmode.v_modeattr & V_MODEOPTINFO) {
if (vmode.v_modeattr & V_MODEGRAPHICS) {
printf(", G %dx%dx%d %d, ",
vmode.v_width, vmode.v_height,
vmode.v_bpp, vmode.v_planes);
} else {
printf(", T %dx%d, ",
vmode.v_width, vmode.v_height);
}
printf("font:%dx%d, ",
vmode.v_cwidth, vmode.v_cheight);
printf("pages:%d, mem:%d",
vmode.v_ipages + 1, vmode.v_memmodel);
}
if (vmode.v_modeattr & V_MODELFB) {
printf("\nVESA: LFB:0x%x, off:0x%x, off_size:0x%x",
vmode.v_lfb, vmode.v_offscreen,
vmode.v_offscreensize*1024);
}
printf("\n");
printf("VESA: window A:0x%x (%x), window B:0x%x (%x), ",
vmode.v_waseg, vmode.v_waattr,
vmode.v_wbseg, vmode.v_wbattr);
printf("size:%dk, gran:%dk\n",
vmode.v_wsize, vmode.v_wgran);
}
#endif /* VESA_DEBUG > 1 */
return (0);
}
/* module loading */
static int
vesa_load(void)
{
int error;
if (vesa_init_done)
return (0);
mtx_init(&vesa_lock, "VESA lock", NULL, MTX_DEF);
/* locate a VGA adapter */
vesa_adp = NULL;
error = vesa_configure(0);
if (error == 0)
vesa_bios_info(bootverbose);
return (error);
}
static int
vesa_unload(void)
{
u_char palette[256*3];
int error;
/* if the adapter is currently in a VESA mode, don't unload */
if ((vesa_adp != NULL) && VESA_MODE(vesa_adp->va_mode))
return (EBUSY);
/*
* FIXME: if there is at least one vty which is in a VESA mode,
* we shouldn't be unloading! XXX
*/
if ((error = vesa_unload_ioctl()) == 0) {
if (vesa_adp != NULL) {
if ((vesa_adp->va_flags & V_ADP_DAC8) != 0) {
vesa_bios_save_palette(0, 256, palette, 8);
vesa_bios_set_dac(6);
vesa_adp->va_flags &= ~V_ADP_DAC8;
vesa_bios_load_palette(0, 256, palette, 6);
}
vesa_adp->va_flags &= ~V_ADP_VESA;
vidsw[vesa_adp->va_index] = prevvidsw;
}
}
vesa_bios_uninit();
mtx_destroy(&vesa_lock);
return (error);
}
static int
vesa_mod_event(module_t mod, int type, void *data)
{
switch (type) {
case MOD_LOAD:
return (vesa_load());
case MOD_UNLOAD:
return (vesa_unload());
}
return (EOPNOTSUPP);
}
static moduledata_t vesa_mod = {
"vesa",
vesa_mod_event,
NULL,
};
DECLARE_MODULE(vesa, vesa_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
MODULE_DEPEND(vesa, x86bios, 1, 1, 1);
#endif /* VGA_NO_MODE_CHANGE */
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