2  * linux/drivers/video/hgafb.c -- Hercules graphics adaptor frame buffer device
10  * - Revision 0.1.8 (23 Oct 2002): Ported to new framebuffer api.
12  * - Revision 0.1.7 (23 Jan 2001): fix crash resulting from MDA only cards
14  * - Revision 0.1.6 (17 Aug 2000): new style structs
16  * - Revision 0.1.5 (13 Mar 2000): spinlocks instead of saveflags();cli();etc
18  * - Revision 0.1.4 (24 Jan 2000): fixed a bug in hga_card_detect() for
19  *                                  HGA-only systems
20  * - Revision 0.1.3 (22 Jan 2000): modified for the new fb_info structure
25  * - Revision 0.1.0  (6 Dec 1999): faster scrolling and minor fixes
26  * - First release  (25 Nov 1999)
70 	return info->screen_base + HGA_ROWADDR(row);  in rowaddr()
73 static int hga_mode = -1;			/* 0 = txt, 1 = gfx mode */
119 	.height 	= -1,
120 	.width 		= -1,
138 /* -------------------------------------------------------------------------
142  * ------------------------------------------------------------------------- */
289 		return -ENOMEM;  in hga_card_detect()
360 	return -EINVAL;  in hga_card_detect()
364  *	hgafb_open - open the framebuffer device
380  *	hgafb_release - open the framebuffer device
395  *	hgafb_setcolreg - set color registers
419  *	hgafb_pan_display - pan or wrap the display
425  *	program the hardware. @info->var is updated to the new values.
427  *	Returns: %0 on success or %-EINVAL for failure.
433 	if (var->vmode & FB_VMODE_YWRAP) {  in hgafb_pan_display()
434 		if (var->yoffset >= info->var.yres_virtual ||  in hgafb_pan_display()
435 		    var->xoffset)  in hgafb_pan_display()
436 			return -EINVAL;  in hgafb_pan_display()
438 		if (var->xoffset + info->var.xres > info->var.xres_virtual  in hgafb_pan_display()
439 		 || var->yoffset + info->var.yres > info->var.yres_virtual  in hgafb_pan_display()
440 		 || var->yoffset % 8)  in hgafb_pan_display()
441 			return -EINVAL;  in hgafb_pan_display()
444 	hga_pan(var->xoffset, var->yoffset);  in hgafb_pan_display()
449  *	hgafb_blank - (un)blank the screen
474 	u_int rows, y;  in hgafb_fillrect()  local
477 	y = rect->dy;  in hgafb_fillrect()
479 	for (rows = rect->height; rows--; y++) {  in hgafb_fillrect()
480 		dest = rowaddr(info, y) + (rect->dx >> 3);  in hgafb_fillrect()
481 		switch (rect->rop) {  in hgafb_fillrect()
483 			memset_io(dest, rect->color, (rect->width >> 3));  in hgafb_fillrect()
494 	u_int rows, y1, y2;  in hgafb_copyarea()  local
498 	if (area->dy <= area->sy) {  in hgafb_copyarea()
499 		y1 = area->sy;  in hgafb_copyarea()
500 		y2 = area->dy;  in hgafb_copyarea()
502 		for (rows = area->height; rows--; ) {  in hgafb_copyarea()
503 			src = rowaddr(info, y1) + (area->sx >> 3);  in hgafb_copyarea()
504 			dest = rowaddr(info, y2) + (area->dx >> 3);  in hgafb_copyarea()
505 			memmove(dest, src, (area->width >> 3));  in hgafb_copyarea()
510 		y1 = area->sy + area->height - 1;  in hgafb_copyarea()
511 		y2 = area->dy + area->height - 1;  in hgafb_copyarea()
513 		for (rows = area->height; rows--;) {  in hgafb_copyarea()
514 			src = rowaddr(info, y1) + (area->sx >> 3);  in hgafb_copyarea()
515 			dest = rowaddr(info, y2) + (area->dx >> 3);  in hgafb_copyarea()
516 			memmove(dest, src, (area->width >> 3));  in hgafb_copyarea()
517 			y1--;  in hgafb_copyarea()
518 			y2--;  in hgafb_copyarea()
526 	u8 *cdat = (u8 *) image->data;  in hgafb_imageblit()
527 	u_int rows, y = image->dy;  in hgafb_imageblit()  local
531 	for (rows = image->height; rows--; y++) {  in hgafb_imageblit()
532 		for (x = 0; x < image->width; x+= 8) {  in hgafb_imageblit()
534 			dest = rowaddr(info, y) + ((image->dx + x)>> 3);  in hgafb_imageblit()
554 /* ------------------------------------------------------------------------- *
558  * ------------------------------------------------------------------------- */
560 /* ------------------------------------------------------------------------- */
578 	info = framebuffer_alloc(0, &pdev->dev);  in hgafb_probe()
581 		return -ENOMEM;  in hgafb_probe()
587 	info->flags = FBINFO_HWACCEL_YPAN;  in hgafb_probe()
588 	info->var = hga_default_var;  in hgafb_probe()
589 	info->fix = hga_fix;  in hgafb_probe()
590 	info->monspecs.hfmin = 0;  in hgafb_probe()
591 	info->monspecs.hfmax = 0;  in hgafb_probe()
592 	info->monspecs.vfmin = 10000;  in hgafb_probe()
593 	info->monspecs.vfmax = 10000;  in hgafb_probe()
594 	info->monspecs.dpms = 0;  in hgafb_probe()
595 	info->fbops = &hgafb_ops;  in hgafb_probe()
596 	info->screen_base = hga_vram;  in hgafb_probe()
601 		return -EINVAL;  in hgafb_probe()
604 	fb_info(info, "%s frame buffer device\n", info->fix.id);  in hgafb_probe()
645 		return -ENODEV;  in hgafb_init()
667 /* -------------------------------------------------------------------------
671  * ------------------------------------------------------------------------- */