#include <sys/types.h>
#include <sys/io.h>
#include <sys/mman.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <limits.h>
#include <ctype.h>
#include "lrmi.h"
#include "vesamode.h"
#include "vbe.h"
#ident "$Id: vbe.c,v 1.6 1999/08/24 01:08:47 nalin Exp $"
/* Return information about a particular video mode. */
struct vbe_mode_info *vbe_get_mode_info(u_int16_t mode)
{
struct LRMI_regs regs;
char *mem;
struct vbe_mode_info *ret = NULL;
/* Initialize LRMI. */
if(LRMI_init() == 0) {
return NULL;
}
/* Allocate a chunk of memory. */
mem = LRMI_alloc_real(sizeof(struct vbe_mode_info));
if(mem == NULL) {
return NULL;
}
memset(mem, 0, sizeof(struct vbe_mode_info));
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f01;
regs.ecx = mode;
regs.es = ((u_int32_t)mem) >> 4;
regs.edi = ((u_int32_t)mem) & 0x0f;
/* Do it. */
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
LRMI_free_real(mem);
return NULL;
}
/* Check for successful return. */
if((regs.eax & 0xffff) != 0x004f) {
LRMI_free_real(mem);
return NULL;
}
/* Get memory for return. */
ret = malloc(sizeof(struct vbe_mode_info));
if(ret == NULL) {
LRMI_free_real(mem);
return NULL;
}
/* Copy the buffer for return. */
memcpy(ret, mem, sizeof(struct vbe_mode_info));
/* Clean up and return. */
LRMI_free_real(mem);
return ret;
}
/* Get VBE info. */
struct vbe_info *vbe_get_vbe_info()
{
struct LRMI_regs regs;
unsigned char *mem;
struct vbe_info *ret = NULL;
int i;
/* Initialize LRMI. */
if(LRMI_init() == 0) {
return NULL;
}
/* Allocate a chunk of memory. */
mem = LRMI_alloc_real(sizeof(struct vbe_mode_info));
if(mem == NULL) {
return NULL;
}
memset(mem, 0, sizeof(struct vbe_mode_info));
/* Set up registers for the interrupt call. */
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f00;
regs.es = ((u_int32_t)mem) >> 4;
regs.edi = ((u_int32_t)mem) & 0x0f;
memcpy(mem, "VBE2", 4);
/* Do it. */
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
LRMI_free_real(mem);
return NULL;
}
/* Check for successful return code. */
if((regs.eax & 0xffff) != 0x004f) {
LRMI_free_real(mem);
return NULL;
}
/* Get memory to return the information. */
ret = malloc(sizeof(struct vbe_info));
if(ret == NULL) {
LRMI_free_real(mem);
return NULL;
}
memcpy(ret, mem, sizeof(struct vbe_info));
/* Set up pointers to usable memory. */
ret->mode_list.list = (u_int16_t*) ((ret->mode_list.addr.seg << 4) +
(ret->mode_list.addr.ofs));
ret->oem_name.string = (char*) ((ret->oem_name.addr.seg << 4) +
(ret->oem_name.addr.ofs));
/* Snip, snip. */
mem = strdup(ret->oem_name.string); /* leak */
while(((i = strlen(mem)) > 0) && isspace(mem[i - 1])) {
mem[i - 1] = '\0';
}
ret->oem_name.string = mem;
/* Set up pointers for VESA 3.0+ strings. */
if(ret->version[1] >= 3) {
/* Vendor name. */
ret->vendor_name.string = (char*)
((ret->vendor_name.addr.seg << 4)
+ (ret->vendor_name.addr.ofs));
mem = strdup(ret->vendor_name.string); /* leak */
while(((i = strlen(mem)) > 0) && isspace(mem[i - 1])) {
mem[i - 1] = '\0';
}
ret->vendor_name.string = mem;
/* Product name. */
ret->product_name.string = (char*)
((ret->product_name.addr.seg << 4)
+ (ret->product_name.addr.ofs));
mem = strdup(ret->product_name.string); /* leak */
while(((i = strlen(mem)) > 0) && isspace(mem[i - 1])) {
mem[i - 1] = '\0';
}
ret->product_name.string = mem;
/* Product revision. */
ret->product_revision.string = (char*)
((ret->product_revision.addr.seg << 4)
+ (ret->product_revision.addr.ofs));
mem = strdup(ret->product_revision.string); /* leak */
while(((i = strlen(mem)) > 0) && isspace(mem[i - 1])) {
mem[i - 1] = '\0';
}
ret->product_revision.string = mem;
}
/* Cleanup. */
LRMI_free_real(mem);
return ret;
}
/* Check if EDID queries are suorted. */
int vbe_get_edid_supported()
{
struct LRMI_regs regs;
int ret = 0;
/* Initialize LRMI. */
if(LRMI_init() == 0) {
return 0;
}
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f15;
regs.ebx = 0x0000;
regs.es = 0x3000;
regs.edi = 0x3000;
/* Do it. */
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
return 0;
}
/* Check for successful return. */
if((regs.eax & 0xff) == 0x4f) {
/* Supported. */
ret = 1;
} else {
/* Not supported. */
ret = 0;
}
/* Clean up and return. */
return ret;
}
/* Get EDID info. */
struct vbe_edid1_info *vbe_get_edid_info()
{
struct LRMI_regs regs;
unsigned char *mem;
struct vbe_edid1_info *ret = NULL;
u_int16_t man;
/* Initialize LRMI. */
if(LRMI_init() == 0) {
return NULL;
}
/* Allocate a chunk of memory. */
mem = LRMI_alloc_real(sizeof(struct vbe_edid1_info));
if(mem == NULL) {
return NULL;
}
memset(mem, 0, sizeof(struct vbe_edid1_info));
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f15;
regs.ebx = 0x0001;
regs.es = ((u_int32_t)mem) >> 4;
regs.edi = ((u_int32_t)mem) & 0x0f;
/* Do it. */
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
LRMI_free_real(mem);
return NULL;
}
#if 0
/* Check for successful return. */
if((regs.eax & 0xffff) != 0x004f) {
LRMI_free_real(mem);
return NULL;
}
#elseif
/* Check for successful return. */
if((regs.eax & 0xff) != 0x4f) {
LRMI_free_real(mem);
return NULL;
}
#endif
/* Get memory for return. */
ret = malloc(sizeof(struct vbe_edid1_info));
if(ret == NULL) {
LRMI_free_real(mem);
return NULL;
}
/* Copy the buffer for return. */
memcpy(ret, mem, sizeof(struct vbe_edid1_info));
memcpy(&man, &ret->manufacturer_name, 2);
man = ntohs(man);
memcpy(&ret->manufacturer_name, &man, 2);
LRMI_free_real(mem);
return ret;
}
/* Figure out what the current video mode is. */
int32_t vbe_get_mode()
{
struct LRMI_regs regs;
int32_t ret = -1;
/* Initialize LRMI. */
if(LRMI_init() == 0) {
return -1;
}
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f03;
/* Do it. */
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
return -1;
}
/* Save the returned value. */
if((regs.eax & 0xffff) == 0x004f) {
ret = regs.ebx & 0xffff;
} else {
ret = -1;
}
/* Clean up and return. */
return ret;
}
/* Set the video mode. */
void vbe_set_mode(u_int16_t mode)
{
struct LRMI_regs regs;
/* Initialize LRMI. */
if(LRMI_init() == 0) {
return;
}
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f02;
regs.ebx = mode;
/* Do it. */
iopl(3);
ioperm(0, 0x400, 1);
LRMI_int(0x10, ®s);
/* Return. */
return;
}
/* Just read ranges from the EDID. */
void vbe_get_edid_ranges(unsigned char *hmin, unsigned char *hmax,
unsigned char *vmin, unsigned char *vmax)
{
struct vbe_edid1_info *edid;
struct vbe_edid_monitor_descriptor *monitor;
int i;
*hmin = *hmax = *vmin = *vmax = 0;
if((edid = vbe_get_edid_info()) == NULL) {
return;
}
for(i = 0; i < 4; i++) {
monitor = &edid->monitor_details.monitor_descriptor[i];
if(monitor->type == vbe_edid_monitor_descriptor_range) {
*hmin = monitor->data.range_data.horizontal_min;
*hmax = monitor->data.range_data.horizontal_max;
*vmin = monitor->data.range_data.vertical_min;
*vmax = monitor->data.range_data.vertical_max;
}
}
}
static int compare_vbe_modelines(const void *m1, const void *m2)
{
const struct vbe_modeline *M1 = (const struct vbe_modeline*) m1;
const struct vbe_modeline *M2 = (const struct vbe_modeline*) m2;
if(M1->width < M2->width) return -1;
if(M1->width > M2->width) return 1;
return 0;
}
struct vbe_modeline *vbe_get_edid_modelines()
{
struct vbe_edid1_info *edid;
struct vbe_modeline *ret;
char buf[LINE_MAX];
int modeline_count = 0, i, j;
if((edid = vbe_get_edid_info()) == NULL) {
return NULL;
}
memcpy(buf, &edid->established_timings,
sizeof(edid->established_timings));
for(i = 0; i < (8 * sizeof(edid->established_timings)); i++) {
if(buf[i / 8] & (1 << (i % 8))) {
modeline_count++;
}
}
/* Count the number of standard timings. */
for(i = 0; i < 8; i++) {
int x, v;
x = edid->standard_timing[i].xresolution;
v = edid->standard_timing[i].vfreq;
if(((edid->standard_timing[i].xresolution & 0x01) != x) &&
((edid->standard_timing[i].vfreq & 0x01) != v)) {
modeline_count++;
}
}
ret = malloc(sizeof(struct vbe_modeline) * (modeline_count + 1));
if(ret == NULL) {
return NULL;
}
memset(ret, 0, sizeof(struct vbe_modeline) * (modeline_count + 1));
modeline_count = 0;
/* Fill out established timings. */
if(edid->established_timings.timing_720x400_70) {
ret[modeline_count].width = 720;
ret[modeline_count].height = 400;
ret[modeline_count].refresh = 70;
modeline_count++;
}
if(edid->established_timings.timing_720x400_88) {
ret[modeline_count].width = 720;
ret[modeline_count].height = 400;
ret[modeline_count].refresh = 88;
modeline_count++;
}
if(edid->established_timings.timing_640x480_60) {
ret[modeline_count].width = 640;
ret[modeline_count].height = 480;
ret[modeline_count].refresh = 60;
modeline_count++;
}
if(edid->established_timings.timing_640x480_67) {
ret[modeline_count].width = 640;
ret[modeline_count].height = 480;
ret[modeline_count].refresh = 67;
modeline_count++;
}
if(edid->established_timings.timing_640x480_72) {
ret[modeline_count].width = 640;
ret[modeline_count].height = 480;
ret[modeline_count].refresh = 72;
modeline_count++;
}
if(edid->established_timings.timing_640x480_75) {
ret[modeline_count].width = 640;
ret[modeline_count].height = 480;
ret[modeline_count].refresh = 75;
modeline_count++;
}
if(edid->established_timings.timing_800x600_56) {
ret[modeline_count].width = 800;
ret[modeline_count].height = 600;
ret[modeline_count].refresh = 56;
modeline_count++;
}
if(edid->established_timings.timing_800x600_60) {
ret[modeline_count].width = 800;
ret[modeline_count].height = 600;
ret[modeline_count].refresh = 60;
modeline_count++;
}
if(edid->established_timings.timing_800x600_72) {
ret[modeline_count].width = 800;
ret[modeline_count].height = 600;
ret[modeline_count].refresh = 72;
modeline_count++;
}
if(edid->established_timings.timing_800x600_75) {
ret[modeline_count].width = 800;
ret[modeline_count].height = 600;
ret[modeline_count].refresh = 75;
modeline_count++;
}
if(edid->established_timings.timing_832x624_75) {
ret[modeline_count].width = 832;
ret[modeline_count].height = 624;
ret[modeline_count].refresh = 75;
modeline_count++;
}
if(edid->established_timings.timing_1024x768_87i) {
ret[modeline_count].width = 1024;
ret[modeline_count].height = 768;
ret[modeline_count].refresh = 87;
ret[modeline_count].interlaced = 1;
modeline_count++;
}
if(edid->established_timings.timing_1024x768_60){
ret[modeline_count].width = 1024;
ret[modeline_count].height = 768;
ret[modeline_count].refresh = 60;
modeline_count++;
}
if(edid->established_timings.timing_1024x768_70){
ret[modeline_count].width = 1024;
ret[modeline_count].height = 768;
ret[modeline_count].refresh = 70;
modeline_count++;
}
if(edid->established_timings.timing_1024x768_75){
ret[modeline_count].width = 1024;
ret[modeline_count].height = 768;
ret[modeline_count].refresh = 75;
modeline_count++;
}
if(edid->established_timings.timing_1280x1024_75) {
ret[modeline_count].width = 1280;
ret[modeline_count].height = 1024;
ret[modeline_count].refresh = 75;
modeline_count++;
}
/* Add in standard timings. */
for(i = 0; i < 8; i++) {
float aspect = 1;
int x, v;
x = edid->standard_timing[i].xresolution;
v = edid->standard_timing[i].vfreq;
if(((edid->standard_timing[i].xresolution & 0x01) != x) &&
((edid->standard_timing[i].vfreq & 0x01) != v)) {
switch(edid->standard_timing[i].aspect) {
case aspect_75: aspect = 0.7500; break;
case aspect_8: aspect = 0.8000; break;
case aspect_5625: aspect = 0.5625; break;
default: aspect = 1; break;
}
x = (edid->standard_timing[i].xresolution + 31) * 8;
ret[modeline_count].width = x;
ret[modeline_count].height = x * aspect;
ret[modeline_count].refresh =
edid->standard_timing[i].vfreq + 60;
modeline_count++;
}
}
/* Now tack on any matching modelines. */
for(i = 0; ret[i].refresh != 0; i++) {
struct vesa_timing_t *t = NULL;
for(j = 0; known_vesa_timings[j].refresh != 0; j++) {
t = &known_vesa_timings[j];
if(ret[i].width == t->x)
if(ret[i].height == t->y)
if(ret[i].refresh == t->refresh) {
snprintf(buf, sizeof(buf),
"ModeLine \"%dx%d\"\t%6.2f "
"%4d %4d %4d %4d %4d %4d %4d %4d %s %s"
, t->x, t->y, t->dotclock,
t->timings[0],
t->timings[0] + t->timings[1],
t->timings[0] + t->timings[1] +
t->timings[2],
t->timings[0] + t->timings[1] +
t->timings[2] + t->timings[3],
t->timings[4],
t->timings[4] + t->timings[5],
t->timings[4] + t->timings[5] +
t->timings[6],
t->timings[4] + t->timings[5] +
t->timings[6] + t->timings[7],
t->hsync == hsync_pos ?
"+hsync" : "-hsync",
t->vsync == vsync_pos ?
"+vsync" : "-vsync");
ret[i].modeline = strdup(buf);
ret[i].hfreq = t->hfreq;
ret[i].vfreq = t->vfreq;
}
}
}
modeline_count = 0;
for(i = 0; ret[i].refresh != 0; i++) {
modeline_count++;
}
qsort(ret, modeline_count, sizeof(ret[0]), compare_vbe_modelines);
return ret;
}
const void *vbe_save_svga_state()
{
struct LRMI_regs regs;
unsigned char *mem;
u_int16_t block_size;
void *data;
/* Initialize LRMI. */
if(LRMI_init() == 0) {
return NULL;
}
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f04;
regs.ecx = 0xffff;
regs.edx = 0;
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
return NULL;
}
if((regs.eax & 0xff) != 0x4f) {
fprintf(stderr, "Get SuperVGA Video State not supported.\n");
return NULL;
}
if((regs.eax & 0xffff) != 0x004f) {
fprintf(stderr, "Get SuperVGA Video State Info failed.\n");
return NULL;
}
block_size = 64 * (regs.ebx & 0xffff);
/* Allocate a chunk of memory. */
mem = LRMI_alloc_real(block_size);
if(mem == NULL) {
return NULL;
}
memset(mem, 0, sizeof(block_size));
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f04;
regs.ecx = 0x000f;
regs.edx = 0x0001;
regs.es = ((u_int32_t)mem) >> 4;
regs.ebx = ((u_int32_t)mem) & 0x0f;
memset(mem, 0, block_size);
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
LRMI_free_real(mem);
return NULL;
}
if((regs.eax & 0xffff) != 0x004f) {
fprintf(stderr, "Get SuperVGA Video State Save failed.\n");
return NULL;
}
data = malloc(block_size);
if(data == NULL) {
LRMI_free_real(mem);
return NULL;
}
/* Clean up and return. */
memcpy(data, mem, block_size);
LRMI_free_real(mem);
return data;
}
void vbe_restore_svga_state(const void *state)
{
struct LRMI_regs regs;
unsigned char *mem;
u_int16_t block_size;
/* Initialize LRMI. */
if(LRMI_init() == 0) {
return;
}
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f04;
regs.ecx = 0x000f;
regs.edx = 0;
/* Find out how much memory we need. */
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
return;
}
if((regs.eax & 0xff) != 0x4f) {
fprintf(stderr, "Get SuperVGA Video State not supported.\n");
return;
}
if((regs.eax & 0xffff) != 0x004f) {
fprintf(stderr, "Get SuperVGA Video State Info failed.\n");
return;
}
block_size = 64 * (regs.ebx & 0xffff);
/* Allocate a chunk of memory. */
mem = LRMI_alloc_real(block_size);
if(mem == NULL) {
return;
}
memset(mem, 0, sizeof(block_size));
memset(®s, 0, sizeof(regs));
regs.eax = 0x4f04;
regs.ecx = 0x000f;
regs.edx = 0x0002;
regs.es = 0x2000;
regs.ebx = 0x0000;
memcpy(mem, state, block_size);
iopl(3);
ioperm(0, 0x400, 1);
if(LRMI_int(0x10, ®s) == 0) {
LRMI_free_real(mem);
return;
}
if((regs.eax & 0xffff) != 0x004f) {
fprintf(stderr, "Get SuperVGA Video State Restore failed.\n");
return;
}
}