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Implement TGUI DDC

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This commit is contained in:
RichardG867
2021-03-07 22:37:52 -03:00
parent 1f3f204301
commit 2cd3fc23e4
1 changed files with 30 additions and 2 deletions
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32
src/video/vid_tgui9440.c
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@@ -70,6 +70,8 @@
#include "cpu.h"
#include <86box/plat.h>
#include <86box/video.h>
#include <86box/i2c.h>
#include <86box/vid_ddc.h>
#include <86box/vid_svga.h>
#include <86box/vid_svga_render.h>
@@ -208,6 +210,8 @@ typedef struct tgui_t
uint64_t status_time;
volatile int write_blitter;
void *i2c, *ddc;
} tgui_t;
video_timings_t timing_tgui_vlb = {VIDEO_BUS, 4, 8, 16, 4, 8, 16};
@@ -381,6 +385,10 @@ void tgui_out(uint16_t addr, uint8_t val, void *p)
}
break;
case 0x37:
i2c_gpio_set(tgui->i2c, (val & 0x02) || !(val & 0x04), (val & 0x01) || !(val & 0x08));
break;
case 0x40: case 0x41: case 0x42: case 0x43:
case 0x44: case 0x45: case 0x46: case 0x47:
if (tgui->type >= TGUI_9440)
@@ -434,6 +442,7 @@ uint8_t tgui_in(uint16_t addr, void *p)
{
tgui_t *tgui = (tgui_t *)p;
svga_t *svga = &tgui->svga;
uint8_t temp;
if (((addr&0xFFF0) == 0x3D0 || (addr&0xFFF0) == 0x3B0) && !(svga->miscout & 1)) addr ^= 0x60;
@@ -482,7 +491,20 @@ uint8_t tgui_in(uint16_t addr, void *p)
case 0x3D4:
return svga->crtcreg;
case 0x3D5:
return svga->crtc[svga->crtcreg];
temp = svga->crtc[svga->crtcreg];
if (svga->crtcreg == 0x37) {
if (!(svga->crtc[0x37] & 0x04)) {
temp &= 0xfd;
if (i2c_gpio_get_scl(tgui->i2c))
temp |= 0x02;
}
if (!(svga->crtc[0x37] & 0x08)) {
temp &= 0xfe;
if (i2c_gpio_get_sda(tgui->i2c))
temp |= 0x01;
}
}
return temp;
case 0x3d8:
return tgui->tgui_3d8;
case 0x3d9:
@@ -1715,6 +1737,9 @@ static void *tgui_init(const device_t *info)
if ((info->flags & DEVICE_PCI) && (tgui->type >= TGUI_9440))
pci_add_card(PCI_ADD_VIDEO, tgui_pci_read, tgui_pci_write, tgui);
tgui->i2c = i2c_gpio_init("ddc_tgui9440");
tgui->ddc = ddc_init(i2c_gpio_get_bus(tgui->i2c));
tgui->wake_fifo_thread = thread_create_event();
tgui->fifo_not_full_event = thread_create_event();
tgui->fifo_thread = thread_create(fifo_thread, tgui);
@@ -1737,7 +1762,10 @@ void tgui_close(void *p)
tgui_t *tgui = (tgui_t *)p;
svga_close(&tgui->svga);
ddc_close(tgui->ddc);
i2c_gpio_close(tgui->i2c);
thread_kill(tgui->fifo_thread);
thread_destroy_event(tgui->wake_fifo_thread);
thread_destroy_event(tgui->fifo_not_full_event);