*/
/*
- * DOS/DJGPP device driver v1.3 for Mesa
+ * DOS/DJGPP device driver v1.6 for Mesa
*
* Copyright (C) 2002 - Borca Daniel
- * Email : dborca@yahoo.com
+ * Email : dborca@users.sourceforge.net
* Web : http://www.geocities.com/dborca
*/
#include "vesa.h"
-
static vl_mode modes[128];
static word16 vesa_ver;
unsigned int vesa_gran_mask, vesa_gran_shift;
-
/*
* VESA info
*/
* VESA 3.0 CRTC timings structure
*/
typedef struct CRTCInfoBlock {
- unsigned short HorizontalTotal;
- unsigned short HorizontalSyncStart;
- unsigned short HorizontalSyncEnd;
- unsigned short VerticalTotal;
- unsigned short VerticalSyncStart;
- unsigned short VerticalSyncEnd;
- unsigned char Flags;
- unsigned long PixelClock; /* units of Hz */
- unsigned short RefreshRate; /* units of 0.01 Hz */
- unsigned char reserved[40];
+ unsigned short HorizontalTotal;
+ unsigned short HorizontalSyncStart;
+ unsigned short HorizontalSyncEnd;
+ unsigned short VerticalTotal;
+ unsigned short VerticalSyncStart;
+ unsigned short VerticalSyncEnd;
+ unsigned char Flags;
+ unsigned long PixelClock; /* units of Hz */
+ unsigned short RefreshRate; /* units of 0.01 Hz */
+ unsigned char reserved[40];
} __PACKED__ CRTCInfoBlock;
#define HNEG (1 << 2)
#define DOUBLESCAN (1 << 0)
-
/* Desc: Attempts to detect VESA, check video modes and create selectors.
*
* In : -
*
* Note: -
*/
-static vl_mode *vesa_init (void)
+static vl_mode *
+vesa_init (void)
{
- __dpmi_regs r;
- word16 *p;
- vl_mode *q;
- char vesa_info[512], tmp[512];
- int maxsize = 0;
- word32 linearfb = 0;
-
- if (vesa_ver) {
- return modes;
- }
-
- _farpokel(_stubinfo->ds_selector, 0, 0x32454256);
- r.x.ax = 0x4f00;
- r.x.di = 0;
- r.x.es = _stubinfo->ds_segment;
- __dpmi_int(0x10, &r);
- movedata(_stubinfo->ds_selector, 0, _my_ds(), (unsigned)vesa_info, 512);
- if ((r.x.ax!=0x004f) || ((_32_ vesa_info[V_SIGN])!=0x41534556)) {
- return NULL;
- }
-
- p = (word16 *)(((_16_ vesa_info[V_MODE_SEG])<<4) + (_16_ vesa_info[V_MODE_OFS]));
- q = modes;
- do {
- if ((q->mode=_farpeekw(__djgpp_dos_sel, (unsigned long)(p++)))==0xffff) {
- break;
- }
-
- r.x.ax = 0x4f01;
- r.x.cx = q->mode;
- r.x.di = 512;
- r.x.es = _stubinfo->ds_segment;
- __dpmi_int(0x10, &r);
- movedata(_stubinfo->ds_selector, 512, _my_ds(), (unsigned)tmp, 256);
- switch (tmp[M_BPP]) {
- case 16:
- q->bpp = tmp[M_RED] + tmp[M_GREEN] + tmp[M_BLUE];
- break;
- case 8:
- case 15:
- case 24:
- case 32:
- q->bpp = tmp[M_BPP];
- break;
- default:
- q->bpp = 0;
- }
- if ((r.x.ax==0x004f) && ((tmp[M_ATTR]&0x11)==0x11) && q->bpp) {
- q->xres = _16_ tmp[M_XRES];
- q->yres = _16_ tmp[M_YRES];
- q->scanlen = _16_ tmp[M_SCANLEN];
- q->gran = (_16_ tmp[M_GRAN])<<10;
- if (tmp[M_ATTR]&0x80) {
-#if 0
- *(q+1) = *q++;
-#else
- vl_mode *q1 = q + 1;
- *q1 = *q++;
-#endif
- linearfb = _32_ tmp[M_PHYS_PTR];
- q->mode |= 0x4000;
- }
- if (maxsize<(q->scanlen*q->yres)) {
- maxsize = q->scanlen*q->yres;
- }
- q++;
- }
- } while (TRUE);
-
- if (q==modes) {
- return NULL;
- }
- if (linearfb) {
- maxsize = ((maxsize+0xfffUL)&~0xfffUL);
- if (_create_selector(&linear_selector, linearfb, maxsize)) {
- return NULL;
- }
- }
- if (_create_selector(&banked_selector, 0xa0000, modes[0].gran)) {
- _remove_selector(&linear_selector);
- return NULL;
- }
-
- for (q=modes; q->mode!=0xffff; q++) {
- q->sel = (q->mode&0x4000) ? linear_selector : banked_selector;
- }
-
- if (vesa_info[V_MAJOR] >= 2) {
- r.x.ax = 0x4f0a;
- r.x.bx = 0;
- __dpmi_int(0x10, &r);
- if (r.x.ax == 0x004f) {
- vesa_pmcode = (word16 *)malloc(r.x.cx);
- movedata(__djgpp_dos_sel, (r.x.es << 4) + r.x.di, _my_ds(), (unsigned)vesa_pmcode, r.x.cx);
- if (vesa_pmcode[3]) {
- p = (word16 *)((long)vesa_pmcode + vesa_pmcode[3]);
- while (*p++ != 0xffff) ;
- } else {
- p = NULL;
- }
- if (p && (*p != 0xffff)) {
- free(vesa_pmcode);
- vesa_pmcode = NULL;
- } else {
- vesa_swbank = (void *)((long)vesa_pmcode + vesa_pmcode[0]);
- }
- }
- }
-
- vesa_ver = _16_ vesa_info[V_MINOR];
- return modes;
+ __dpmi_regs r;
+ word16 *p;
+ vl_mode *q;
+ char vesa_info[512], tmp[512];
+ int maxsize = 0;
+ word32 linearfb = 0;
+
+ if (vesa_ver) {
+ return modes;
+ }
+
+ _farpokel(_stubinfo->ds_selector, 0, 0x32454256);
+ r.x.ax = 0x4f00;
+ r.x.di = 0;
+ r.x.es = _stubinfo->ds_segment;
+ __dpmi_int(0x10, &r);
+ movedata(_stubinfo->ds_selector, 0, _my_ds(), (unsigned)vesa_info, 512);
+ if ((r.x.ax != 0x004f) || ((_32_ vesa_info[V_SIGN]) != 0x41534556)) {
+ return NULL;
+ }
+
+ p = (word16 *)(((_16_ vesa_info[V_MODE_SEG])<<4) + (_16_ vesa_info[V_MODE_OFS]));
+ q = modes;
+ do {
+ if ((q->mode=_farpeekw(__djgpp_dos_sel, (unsigned long)(p++))) == 0xffff) {
+ break;
+ }
+
+ r.x.ax = 0x4f01;
+ r.x.cx = q->mode;
+ r.x.di = 512;
+ r.x.es = _stubinfo->ds_segment;
+ __dpmi_int(0x10, &r);
+ movedata(_stubinfo->ds_selector, 512, _my_ds(), (unsigned)tmp, 256);
+ switch (tmp[M_BPP]) {
+ case 16:
+ q->bpp = tmp[M_RED] + tmp[M_GREEN] + tmp[M_BLUE];
+ break;
+ case 8:
+ case 15:
+ case 24:
+ case 32:
+ q->bpp = tmp[M_BPP];
+ break;
+ default:
+ q->bpp = 0;
+ }
+ if ((r.x.ax == 0x004f) && ((tmp[M_ATTR] & 0x11) == 0x11) && q->bpp) {
+ q->xres = _16_ tmp[M_XRES];
+ q->yres = _16_ tmp[M_YRES];
+ q->scanlen = _16_ tmp[M_SCANLEN];
+ q->gran = (_16_ tmp[M_GRAN])<<10;
+ if (tmp[M_ATTR] & 0x80) {
+ vl_mode *q1 = q + 1;
+ *q1 = *q++;
+ linearfb = _32_ tmp[M_PHYS_PTR];
+ q->mode |= 0x4000;
+ }
+ if (maxsize < (q->scanlen * q->yres)) {
+ maxsize = q->scanlen * q->yres;
+ }
+ q++;
+ }
+ } while (TRUE);
+
+ if (q == modes) {
+ return NULL;
+ }
+ if (linearfb) {
+ maxsize = (maxsize + 0xfffUL) & ~0xfffUL;
+ if (_create_selector(&linear_selector, linearfb, maxsize)) {
+ return NULL;
+ }
+ }
+ if (_create_selector(&banked_selector, 0xa0000, modes[0].gran)) {
+ _remove_selector(&linear_selector);
+ return NULL;
+ }
+
+ for (q = modes; q->mode != 0xffff; q++) {
+ q->sel = (q->mode & 0x4000) ? linear_selector : banked_selector;
+ }
+
+ if (vesa_info[V_MAJOR] >= 2) {
+ r.x.ax = 0x4f0a;
+ r.x.bx = 0;
+ __dpmi_int(0x10, &r);
+ if (r.x.ax == 0x004f) {
+ vesa_pmcode = (word16 *)malloc(r.x.cx);
+ if (vesa_pmcode != NULL) {
+ movedata(__djgpp_dos_sel, (r.x.es << 4) + r.x.di, _my_ds(), (unsigned)vesa_pmcode, r.x.cx);
+ if (vesa_pmcode[3]) {
+ p = (word16 *)((long)vesa_pmcode + vesa_pmcode[3]);
+ while (*p++ != 0xffff) {
+ }
+ } else {
+ p = NULL;
+ }
+ if (p && (*p != 0xffff)) {
+ free(vesa_pmcode);
+ vesa_pmcode = NULL;
+ } else {
+ vesa_swbank = (void *)((long)vesa_pmcode + vesa_pmcode[0]);
+ }
+ }
+ }
+ }
+
+ vesa_ver = _16_ vesa_info[V_MINOR];
+ return modes;
}
-
/* Desc: Frees all resources allocated by VESA init code.
*
* In : -
*
* Note: -
*/
-static void vesa_fini (void)
+static void
+vesa_fini (void)
{
- if (vesa_ver) {
- _remove_selector(&linear_selector);
- _remove_selector(&banked_selector);
- if (vesa_pmcode != NULL) {
- free(vesa_pmcode);
- vesa_pmcode = NULL;
- }
- }
+ if (vesa_ver) {
+ _remove_selector(&linear_selector);
+ _remove_selector(&banked_selector);
+ if (vesa_pmcode != NULL) {
+ free(vesa_pmcode);
+ vesa_pmcode = NULL;
+ }
+ }
}
-
/* Desc: Uses VESA 3.0 function 0x4F0B to find the closest pixel clock to the requested value.
*
* In : mode, clock
*
* Note: -
*/
-static unsigned long _closest_pixclk (int mode_no, unsigned long vclk)
+static unsigned long
+_closest_pixclk (int mode_no, unsigned long vclk)
{
- __dpmi_regs r;
+ __dpmi_regs r;
- r.x.ax = 0x4F0B;
- r.h.bl = 0;
- r.d.ecx = vclk;
- r.x.dx = mode_no;
- __dpmi_int(0x10, &r);
+ r.x.ax = 0x4F0B;
+ r.h.bl = 0;
+ r.d.ecx = vclk;
+ r.x.dx = mode_no;
+ __dpmi_int(0x10, &r);
- return (r.x.ax==0x004f) ? r.d.ecx : 0;
+ return (r.x.ax == 0x004f) ? r.d.ecx : 0;
}
-
/* Desc: Calculates CRTC mode timings.
*
* In : crtc block, geometry, adjust
*
* Note:
*/
-static void _crtc_timing (CRTCInfoBlock *crtc, int xres, int yres, int xadjust, int yadjust)
+static void
+_crtc_timing (CRTCInfoBlock *crtc, int xres, int yres, int xadjust, int yadjust)
{
- int HTotal, VTotal;
- int HDisp, VDisp;
- int HSS, VSS;
- int HSE, VSE;
- int HSWidth, VSWidth;
- int SS, SE;
- int doublescan = FALSE;
-
- if (yres < 400) {
- doublescan = TRUE;
- yres *= 2;
- }
-
- HDisp = xres;
- HTotal = (int)(HDisp * 1.27) & ~0x7;
- HSWidth = (int)((HTotal - HDisp) / 5) & ~0x7;
- HSS = HDisp + 16;
- HSE = HSS + HSWidth;
- VDisp = yres;
- VTotal = VDisp * 1.07;
- VSWidth = (VTotal / 100) + 1;
- VSS = VDisp + ((int)(VTotal - VDisp) / 5) + 1;
- VSE = VSS + VSWidth;
-
- SS = HSS + xadjust;
- SE = HSE + xadjust;
-
- if (xadjust < 0) {
- if (SS < (HDisp + 8)) {
- SS = HDisp + 8;
- SE = SS + HSWidth;
- }
- } else {
- if ((HTotal - 24) < SE) {
- SE = HTotal - 24;
- SS = SE - HSWidth;
- }
- }
-
- HSS = SS;
- HSE = SE;
-
- SS = VSS + yadjust;
- SE = VSE + yadjust;
-
- if (yadjust < 0) {
- if (SS < (VDisp + 3)) {
- SS = VDisp + 3;
- SE = SS + VSWidth;
- }
- } else {
- if ((VTotal - 4) < SE) {
- SE = VTotal - 4;
- SS = SE - VSWidth;
- }
- }
-
- VSS = SS;
- VSE = SE;
-
- crtc->HorizontalTotal = HTotal;
- crtc->HorizontalSyncStart = HSS;
- crtc->HorizontalSyncEnd = HSE;
- crtc->VerticalTotal = VTotal;
- crtc->VerticalSyncStart = VSS;
- crtc->VerticalSyncEnd = VSE;
- crtc->Flags = HNEG | VNEG;
-
- if (doublescan)
- crtc->Flags |= DOUBLESCAN;
+ int HTotal, VTotal;
+ int HDisp, VDisp;
+ int HSS, VSS;
+ int HSE, VSE;
+ int HSWidth, VSWidth;
+ int SS, SE;
+ int doublescan = FALSE;
+
+ if (yres < 400) {
+ doublescan = TRUE;
+ yres *= 2;
+ }
+
+ HDisp = xres;
+ HTotal = (int)(HDisp * 1.27) & ~0x7;
+ HSWidth = (int)((HTotal - HDisp) / 5) & ~0x7;
+ HSS = HDisp + 16;
+ HSE = HSS + HSWidth;
+ VDisp = yres;
+ VTotal = VDisp * 1.07;
+ VSWidth = (VTotal / 100) + 1;
+ VSS = VDisp + ((int)(VTotal - VDisp) / 5) + 1;
+ VSE = VSS + VSWidth;
+
+ SS = HSS + xadjust;
+ SE = HSE + xadjust;
+
+ if (xadjust < 0) {
+ if (SS < (HDisp + 8)) {
+ SS = HDisp + 8;
+ SE = SS + HSWidth;
+ }
+ } else {
+ if ((HTotal - 24) < SE) {
+ SE = HTotal - 24;
+ SS = SE - HSWidth;
+ }
+ }
+
+ HSS = SS;
+ HSE = SE;
+
+ SS = VSS + yadjust;
+ SE = VSE + yadjust;
+
+ if (yadjust < 0) {
+ if (SS < (VDisp + 3)) {
+ SS = VDisp + 3;
+ SE = SS + VSWidth;
+ }
+ } else {
+ if ((VTotal - 4) < SE) {
+ SE = VTotal - 4;
+ SS = SE - VSWidth;
+ }
+ }
+
+ VSS = SS;
+ VSE = SE;
+
+ crtc->HorizontalTotal = HTotal;
+ crtc->HorizontalSyncStart = HSS;
+ crtc->HorizontalSyncEnd = HSE;
+ crtc->VerticalTotal = VTotal;
+ crtc->VerticalSyncStart = VSS;
+ crtc->VerticalSyncEnd = VSE;
+ crtc->Flags = HNEG | VNEG;
+
+ if (doublescan) {
+ crtc->Flags |= DOUBLESCAN;
+ }
}
-
/* Desc: Attempts to enter specified video mode.
*
* In : ptr to mode structure, refresh rate
*
* Note: -
*/
-static int vesa_entermode (vl_mode *p, int refresh)
+static int
+vesa_entermode (vl_mode *p, int refresh)
{
- __dpmi_regs r;
-
- if (p->mode & 0x4000) {
- VESA.blit = _can_mmx() ? vesa_l_dump_virtual_mmx : vesa_l_dump_virtual;
- } else {
- VESA.blit = vesa_b_dump_virtual;
- { int n; for (vesa_gran_shift=0, n=p->gran; n; vesa_gran_shift++, n>>=1) ; }
- vesa_gran_mask = (1<<(--vesa_gran_shift)) - 1;
- if ((unsigned)p->gran != (vesa_gran_mask+1)) {
- return !0;
- }
- }
-
- if (oldmode == -1) {
- r.x.ax = 0x4f03;
- __dpmi_int(0x10, &r);
- oldmode = r.x.bx;
- }
-
- r.x.ax = 0x4f02;
- r.x.bx = p->mode;
-
- if (refresh && ((vesa_ver>>8) >= 3)) {
- /* VESA 3.0 stuff for controlling the refresh rate */
- CRTCInfoBlock crtc;
- unsigned long vclk;
- double f0;
-
- _crtc_timing(&crtc, p->xres, p->yres, 0, 0);
-
- vclk = (double)crtc.HorizontalTotal * crtc.VerticalTotal * refresh;
- vclk = _closest_pixclk(p->mode, vclk);
-
- if (vclk != 0) {
- f0 = (double)vclk / (crtc.HorizontalTotal * crtc.VerticalTotal);
- /*_current_refresh_rate = (int)(f0 + 0.5);*/
-
- crtc.PixelClock = vclk;
- crtc.RefreshRate = refresh * 100;
-
- movedata(_my_ds(), (unsigned)&crtc, _stubinfo->ds_selector, 0, sizeof(crtc));
-
- r.x.di = 0;
- r.x.es = _stubinfo->ds_segment;
- r.x.bx |= 0x0800;
- }
- }
-
- __dpmi_int(0x10, &r);
- if (r.x.ax != 0x004f) {
- return !0;
- }
-
- if (p->bpp == 8) {
- r.x.ax = 0x4f08;
- r.x.bx = 0x0800;
- __dpmi_int(0x10, &r);
- if (r.x.ax == 0x004f) {
- r.x.ax = 0x4f08;
- r.h.bl = 0x01;
- __dpmi_int(0x10, &r);
- vesa_color_precision = r.h.bh;
- }
- }
-
- return 0;
+ __dpmi_regs r;
+
+ if (p->mode & 0x4000) {
+ VESA.blit = _can_mmx() ? vesa_l_dump_virtual_mmx : vesa_l_dump_virtual;
+ } else {
+ VESA.blit = vesa_b_dump_virtual;
+ { int n; for (vesa_gran_shift=0, n=p->gran; n; vesa_gran_shift++, n>>=1) ; }
+ vesa_gran_mask = (1 << (--vesa_gran_shift)) - 1;
+ if ((unsigned)p->gran != (vesa_gran_mask+1)) {
+ return !0;
+ }
+ }
+
+ if (oldmode == -1) {
+ r.x.ax = 0x4f03;
+ __dpmi_int(0x10, &r);
+ oldmode = r.x.bx;
+ }
+
+ r.x.ax = 0x4f02;
+ r.x.bx = p->mode;
+
+ if (refresh && ((vesa_ver>>8) >= 3)) {
+ /* VESA 3.0 stuff for controlling the refresh rate */
+ CRTCInfoBlock crtc;
+ unsigned long vclk;
+ double f0;
+
+ _crtc_timing(&crtc, p->xres, p->yres, 0, 0);
+
+ vclk = (double)crtc.HorizontalTotal * crtc.VerticalTotal * refresh;
+ vclk = _closest_pixclk(p->mode, vclk);
+
+ if (vclk != 0) {
+ f0 = (double)vclk / (crtc.HorizontalTotal * crtc.VerticalTotal);
+ /*_current_refresh_rate = (int)(f0 + 0.5);*/
+
+ crtc.PixelClock = vclk;
+ crtc.RefreshRate = refresh * 100;
+
+ movedata(_my_ds(), (unsigned)&crtc, _stubinfo->ds_selector, 0, sizeof(crtc));
+
+ r.x.di = 0;
+ r.x.es = _stubinfo->ds_segment;
+ r.x.bx |= 0x0800;
+ }
+ }
+
+ __dpmi_int(0x10, &r);
+ if (r.x.ax != 0x004f) {
+ return !0;
+ }
+
+ if (p->bpp == 8) {
+ r.x.ax = 0x4f08;
+ r.x.bx = 0x0800;
+ __dpmi_int(0x10, &r);
+ if (r.x.ax == 0x004f) {
+ r.x.ax = 0x4f08;
+ r.h.bl = 0x01;
+ __dpmi_int(0x10, &r);
+ vesa_color_precision = r.h.bh;
+ }
+ }
+
+ return 0;
}
-
/* Desc: Restores to the mode prior to first call to vesa_entermode.
*
* In : -
*
* Note: -
*/
-static void vesa_restore (void)
+static void
+vesa_restore (void)
{
- __dpmi_regs r;
-
- if (oldmode != -1) {
- r.x.ax = 0x4f02;
- r.x.bx = oldmode;
- __dpmi_int(0x10, &r);
- }
+ __dpmi_regs r;
+
+ if (oldmode != -1) {
+ r.x.ax = 0x4f02;
+ r.x.bx = oldmode;
+ __dpmi_int(0x10, &r);
+ oldmode = -1;
+ }
}
-
/* Desc: set one palette entry
*
* In : color index, R, G, B
*
* Note: uses integer values
*/
-static void vesa_setCI_i (int index, int red, int green, int blue)
+static void
+vesa_setCI_i (int index, int red, int green, int blue)
{
#if 0
- __asm("\n\
- movw $0x1010, %%ax \n\
- movb %1, %%dh \n\
- movb %2, %%ch \n\
- int $0x10 \n\
- "::"b"(index), "m"(red), "m"(green), "c"(blue):"%eax", "%edx");
+ __asm("\n\
+ movw $0x1010, %%ax \n\
+ movb %1, %%dh \n\
+ movb %2, %%ch \n\
+ int $0x10 \n\
+ "::"b"(index), "m"(red), "m"(green), "c"(blue):"%eax", "%edx");
#else
- outportb(0x03C8, index);
- outportb(0x03C9, red);
- outportb(0x03C9, green);
- outportb(0x03C9, blue);
+ outportb(0x03C8, index);
+ outportb(0x03C9, red);
+ outportb(0x03C9, green);
+ outportb(0x03C9, blue);
#endif
}
-
/* Desc: set one palette entry
*
* In : color index, R, G, B
*
* Note: uses normalized values
*/
-static void vesa_setCI_f (int index, float red, float green, float blue)
+static void
+vesa_setCI_f (int index, float red, float green, float blue)
{
float max = (1 << vesa_color_precision) - 1;
}
-
/* Desc: state retrieval
*
* In : parameter name, ptr to storage
*
* Note: -
*/
-static int vesa_get (int pname, int *params)
+static int
+vesa_get (int pname, int *params)
{
- switch (pname) {
- case VL_GET_CI_PREC:
- params[0] = vesa_color_precision;
- break;
- default:
- return -1;
- }
- return 0;
+ switch (pname) {
+ case VL_GET_CI_PREC:
+ params[0] = vesa_color_precision;
+ break;
+ default:
+ return -1;
+ }
+ return 0;
}
-
/*
* the driver
*/
vl_driver VESA = {
- vesa_init,
- vesa_entermode,
- NULL,
- vesa_setCI_f,
- vesa_setCI_i,
- vesa_get,
- vesa_restore,
- vesa_fini
+ vesa_init,
+ vesa_entermode,
+ NULL,
+ vesa_setCI_f,
+ vesa_setCI_i,
+ vesa_get,
+ vesa_restore,
+ vesa_fini
};
projects / mesa.git / blobdiff