vgabios: Add support for vbe get/set line length function.

[seabios.git] / vgasrc / vbe.c

diff --git a/vgasrc/vbe.c b/vgasrc/vbe.c
index ee80e978b846c37fb2d47df31f32a415612b938d..68d20259827cd28aeda174fa69dd75265290624e 100644 (file)
--- a/vgasrc/vbe.c
+++ b/vgasrc/vbe.c
@@ -13,7 +13,6 @@
 #include "biosvar.h" // get_global_set
 #include "vgahw.h" // vgahw_set_mode
 
-int VBE_enabled VAR16;
 u32 VBE_total_memory VAR16 = 256 * 1024;
 u32 VBE_capabilities VAR16;
 u32 VBE_framebuffer VAR16;
@@ -101,17 +100,19 @@ vbe_104f01(struct bregs *regs)
     SET_FARVAR(seg, info->winB_attributes, 0);
     SET_FARVAR(seg, info->win_granularity, GET_GLOBAL(VBE_win_granularity));
     SET_FARVAR(seg, info->win_size, 64); /* Bank size 64K */
-    SET_FARVAR(seg, info->winA_seg, SEG_GRAPH);
+    SET_FARVAR(seg, info->winA_seg, GET_GLOBAL(vmode_g->sstart));
     SET_FARVAR(seg, info->winB_seg, 0x0);
-    SET_FARVAR(seg, info->win_func_ptr.segoff, 0x0);
+    extern void entry_104f05(void);
+    SET_FARVAR(seg, info->win_func_ptr
+               , SEGOFF(get_global_seg(), (u32)entry_104f05));
     int width = GET_GLOBAL(vmode_g->width);
     int height = GET_GLOBAL(vmode_g->height);
-    int linesize = width * DIV_ROUND_UP(depth, 8); // XXX - not always true
+    int linesize = width * DIV_ROUND_UP(depth, 8);
     SET_FARVAR(seg, info->bytes_per_scanline, linesize);
     SET_FARVAR(seg, info->xres, width);
     SET_FARVAR(seg, info->yres, height);
-    SET_FARVAR(seg, info->xcharsize, 8);
-    SET_FARVAR(seg, info->ycharsize, 16);
+    SET_FARVAR(seg, info->xcharsize, GET_GLOBAL(vmode_g->cwidth));
+    SET_FARVAR(seg, info->ycharsize, GET_GLOBAL(vmode_g->cheight));
     if (depth == 4)
         SET_FARVAR(seg, info->planes, 4);
     else
@@ -185,9 +186,9 @@ vbe_104f02(struct bregs *regs)
 {
     dprintf(1, "VBE mode set: %x\n", regs->bx);
 
-    int mode = regs->bx & 0x1ff;
-    int flags = regs->bx & (MF_CUSTOMCRTC|MF_LINEARFB|MF_NOCLEARMEM);
-    int ret = vgahw_set_mode(mode, flags);
+    int mode = regs->bx & ~MF_VBEFLAGS;
+    int flags = regs->bx & MF_VBEFLAGS;
+    int ret = vga_set_mode(mode, flags);
 
     regs->ah = ret;
     regs->al = 0x4f;
@@ -196,12 +197,8 @@ vbe_104f02(struct bregs *regs)
 static void
 vbe_104f03(struct bregs *regs)
 {
-    u16 mode = GET_BDA(vbe_mode);
-    if (!mode)
-        regs->bx = GET_BDA(video_mode);
-
+    regs->bx = GET_BDA(vbe_mode);
     dprintf(1, "VBE current mode=%x\n", regs->bx);
-
     regs->ax = 0x004f;
 }
 
@@ -212,18 +209,65 @@ vbe_104f04(struct bregs *regs)
     regs->ax = 0x0100;
 }
 
-static void
+void VISIBLE16
 vbe_104f05(struct bregs *regs)
 {
-    debug_stub(regs);
+    if (regs->bh > 1 || regs->bl > 1)
+        goto fail;
+    if (GET_BDA(vbe_mode) & MF_LINEARFB) {
+        regs->ah = VBE_RETURN_STATUS_INVALID;
+        return;
+    }
+    struct vgamode_s *vmode_g = get_current_mode();
+    if (! vmode_g)
+        goto fail;
+    if (regs->bh) {
+        int ret = vgahw_get_window(vmode_g, regs->bl);
+        if (ret < 0)
+            goto fail;
+        regs->dx = ret;
+        regs->ax = 0x004f;
+        return;
+    }
+    int ret = vgahw_set_window(vmode_g, regs->bl, regs->dx);
+    if (ret)
+        goto fail;
+    regs->ax = 0x004f;
+    return;
+fail:
     regs->ax = 0x0100;
 }
 
 static void
 vbe_104f06(struct bregs *regs)
 {
-    debug_stub(regs);
-    regs->ax = 0x0100;
+    if (regs->bl > 0x02)
+        goto fail;
+    struct vgamode_s *vmode_g = get_current_mode();
+    if (! vmode_g)
+        goto fail;
+    int bpp = vga_bpp(vmode_g);
+
+    if (regs->bl == 0x00) {
+        int ret = vgahw_set_linelength(vmode_g, DIV_ROUND_UP(regs->cx * bpp, 8));
+        if (ret)
+            goto fail;
+    } else if (regs->bl == 0x02) {
+        int ret = vgahw_set_linelength(vmode_g, regs->cx);
+        if (ret)
+            goto fail;
+    }
+    int linelength = vgahw_get_linelength(vmode_g);
+    if (linelength < 0)
+        goto fail;
+
+    regs->bx = linelength;
+    regs->cx = (linelength * 8) / bpp;
+    regs->dx = GET_GLOBAL(VBE_total_memory) / linelength;
+    regs->ax = 0x004f;
+    return;
+fail:
+    regs->ax = 0x014f;
 }
 
 static void
@@ -257,7 +301,7 @@ vbe_104fXX(struct bregs *regs)
 void
 handle_104f(struct bregs *regs)
 {
-    if (!GET_GLOBAL(VBE_enabled)) {
+    if (!CONFIG_VGA_VBE) {
         vbe_104fXX(regs);
         return;
     }