#include "stdvga.h" // stdvga_init
#include "ioport.h" // outb
#include "farptr.h" // SET_FARVAR
-#include "biosvar.h" // GET_BDA
-#include "vgabios.h" // VGAREG_*
+#include "biosvar.h" // GET_GLOBAL
+#include "util.h" // memcpy_far
+#include "vbe.h" // VBE_RETURN_STATUS_FAILED
+#include "vgabios.h" // find_vga_entry
// TODO
// * replace direct in/out calls with wrapper functions
* Attribute control
****************************************************************/
-void
+static void
stdvga_screen_disable(void)
{
inb(VGAREG_ACTL_RESET);
outb(0x00, VGAREG_ACTL_ADDRESS);
}
-void
+static void
stdvga_screen_enable(void)
{
inb(VGAREG_ACTL_RESET);
outb(GET_FARVAR(seg, info->peladdr), VGAREG_DAC_WRITE_ADDRESS);
}
+void
+stdvga_perform_gray_scale_summing(u16 start, u16 count)
+{
+ stdvga_screen_disable();
+ int i;
+ for (i = start; i < start+count; i++) {
+ u8 rgb[3];
+ stdvga_get_dac_regs(GET_SEG(SS), rgb, i, 1);
+
+ // intensity = ( 0.3 * Red ) + ( 0.59 * Green ) + ( 0.11 * Blue )
+ u16 intensity = ((77 * rgb[0] + 151 * rgb[1] + 28 * rgb[2]) + 0x80) >> 8;
+ if (intensity > 0x3f)
+ intensity = 0x3f;
+
+ stdvga_set_dac_regs(GET_SEG(SS), rgb, i, 1);
+ }
+ stdvga_screen_enable();
+}
+
/****************************************************************
* Memory control
outw((spec << 8) | 0x03, VGAREG_SEQU_ADDRESS);
}
-void
+
+/****************************************************************
+ * Font loading
+ ****************************************************************/
+
+static void
get_font_access(void)
{
outw(0x0100, VGAREG_SEQU_ADDRESS);
outw(0x0406, VGAREG_GRDC_ADDRESS);
}
-void
+static void
release_font_access(void)
{
outw(0x0100, VGAREG_SEQU_ADDRESS);
outw(0x0302, VGAREG_SEQU_ADDRESS);
outw(0x0304, VGAREG_SEQU_ADDRESS);
outw(0x0300, VGAREG_SEQU_ADDRESS);
- u16 v = (inw(VGAREG_READ_MISC_OUTPUT) & 0x01) ? 0x0e : 0x0a;
+ u16 v = (inb(VGAREG_READ_MISC_OUTPUT) & 0x01) ? 0x0e : 0x0a;
outw((v << 8) | 0x06, VGAREG_GRDC_ADDRESS);
outw(0x0004, VGAREG_GRDC_ADDRESS);
outw(0x1005, VGAREG_GRDC_ADDRESS);
}
+void
+stdvga_load_font(u16 seg, void *src_far, u16 count
+ , u16 start, u8 destflags, u8 fontsize)
+{
+ get_font_access();
+ u16 blockaddr = ((destflags & 0x03) << 14) + ((destflags & 0x04) << 11);
+ void *dest_far = (void*)(blockaddr + start*32);
+ u16 i;
+ for (i = 0; i < count; i++)
+ memcpy_far(SEG_GRAPH, dest_far + i*32
+ , seg, src_far + i*fontsize, fontsize);
+ release_font_access();
+}
+
/****************************************************************
* CRTC registers
****************************************************************/
-static u16
-get_crtc(void)
+u16
+stdvga_get_crtc(void)
{
- return GET_BDA(crtc_address);
+ if (inb(VGAREG_READ_MISC_OUTPUT) & 1)
+ return VGAREG_VGA_CRTC_ADDRESS;
+ return VGAREG_MDA_CRTC_ADDRESS;
}
void
stdvga_set_cursor_shape(u8 start, u8 end)
{
- u16 crtc_addr = get_crtc();
+ u16 crtc_addr = stdvga_get_crtc();
outb(0x0a, crtc_addr);
outb(start, crtc_addr + 1);
outb(0x0b, crtc_addr);
void
stdvga_set_active_page(u16 address)
{
- u16 crtc_addr = get_crtc();
+ u16 crtc_addr = stdvga_get_crtc();
outb(0x0c, crtc_addr);
outb((address & 0xff00) >> 8, crtc_addr + 1);
outb(0x0d, crtc_addr);
void
stdvga_set_cursor_pos(u16 address)
{
- u16 crtc_addr = get_crtc();
+ u16 crtc_addr = stdvga_get_crtc();
outb(0x0e, crtc_addr);
outb((address & 0xff00) >> 8, crtc_addr + 1);
outb(0x0f, crtc_addr);
void
stdvga_set_scan_lines(u8 lines)
{
- u16 crtc_addr = get_crtc();
+ u16 crtc_addr = stdvga_get_crtc();
outb(0x09, crtc_addr);
u8 crtc_r9 = inb(crtc_addr + 1);
crtc_r9 = (crtc_r9 & 0xe0) | (lines - 1);
u16
stdvga_get_vde(void)
{
- u16 crtc_addr = get_crtc();
+ u16 crtc_addr = stdvga_get_crtc();
outb(0x12, crtc_addr);
u16 vde = inb(crtc_addr + 1);
outb(0x07, crtc_addr);
void
stdvga_save_state(u16 seg, struct saveVideoHardware *info)
{
- u16 crtc_addr = get_crtc();
+ u16 crtc_addr = stdvga_get_crtc();
SET_FARVAR(seg, info->sequ_index, inb(VGAREG_SEQU_ADDRESS));
SET_FARVAR(seg, info->crtc_index, inb(crtc_addr));
SET_FARVAR(seg, info->grdc_index, inb(VGAREG_GRDC_ADDRESS));
outb(GET_FARVAR(seg, info->feature), crtc_addr - 0x4 + 0xa);
}
-void
-stdvga_set_mode(struct vgamode_s *vmode_g)
+static void
+clear_screen(struct vgamode_s *vmode_g)
+{
+ switch (GET_GLOBAL(vmode_g->memmodel)) {
+ case CTEXT:
+ case MTEXT:
+ memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0720, 32*1024);
+ break;
+ case CGA:
+ memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0000, 32*1024);
+ break;
+ default:
+ // XXX - old code gets/sets/restores sequ register 2 to 0xf -
+ // but it should always be 0xf anyway.
+ memset16_far(GET_GLOBAL(vmode_g->sstart), 0, 0x0000, 64*1024);
+ }
+}
+
+int
+stdvga_set_mode(int mode, int flags)
{
+ // find the entry in the video modes
+ struct vgamode_s *vmode_g = find_vga_entry(mode);
+ dprintf(1, "mode search %02x found %p\n", mode, vmode_g);
+ if (!vmode_g)
+ return VBE_RETURN_STATUS_FAILED;
+
+ // if palette loading (bit 3 of modeset ctl = 0)
+ if (!(flags & MF_NOPALETTE)) { // Set the PEL mask
+ stdvga_set_pel_mask(GET_GLOBAL(vmode_g->pelmask));
+
+ // From which palette
+ u8 *palette_g = GET_GLOBAL(vmode_g->dac);
+ u16 palsize = GET_GLOBAL(vmode_g->dacsize) / 3;
+
+ // Always 256*3 values
+ stdvga_set_dac_regs(get_global_seg(), palette_g, 0, palsize);
+ u16 i;
+ for (i = palsize; i < 0x0100; i++) {
+ static u8 rgb[3] VAR16;
+ stdvga_set_dac_regs(get_global_seg(), rgb, i, 1);
+ }
+
+ if (flags & MF_GRAYSUM)
+ stdvga_perform_gray_scale_summing(0x00, 0x100);
+ }
+
// Reset Attribute Ctl flip-flop
inb(VGAREG_ACTL_RESET);
// Enable video
outb(0x20, VGAREG_ACTL_ADDRESS);
inb(VGAREG_ACTL_RESET);
+
+ // Clear screen
+ if (!(flags & MF_NOCLEARMEM))
+ clear_screen(vmode_g);
+
+ // Write the fonts in memory
+ u8 memmodel = GET_GLOBAL(vmode_g->memmodel);
+ if (memmodel & TEXT)
+ stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, 0, 16);
+
+ // Setup BDA variables
+ modeswitch_set_bda(mode, flags, vmode_g);
+
+ return 0;
}
projects / seabios.git / blobdiff