104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
#include <stdio.h>
|
|
|
|
#include <hw/csr.h>
|
|
#include <hw/flags.h>
|
|
|
|
#include "fb.h"
|
|
|
|
int fb_hres = 640;
|
|
int fb_vres = 480;
|
|
|
|
static void fb_clkgen_write(int cmd, int data)
|
|
{
|
|
int word;
|
|
|
|
word = (data << 2) | cmd;
|
|
crg_cmd_data_write(word);
|
|
crg_send_cmd_data_write(1);
|
|
while(crg_status_read() & CLKGEN_STATUS_BUSY);
|
|
}
|
|
|
|
void fb_set_mode(int mode)
|
|
{
|
|
int clock_m, clock_d;
|
|
|
|
switch(mode) {
|
|
default:
|
|
case FB_MODE_640_480: // Pixel clock: 25MHz
|
|
fb_hres = 640;
|
|
fb_vres = 480;
|
|
clock_m = 2;
|
|
clock_d = 4;
|
|
fb_fi_hres_write(640);
|
|
fb_fi_hsync_start_write(656);
|
|
fb_fi_hsync_end_write(752);
|
|
fb_fi_hscan_write(800);
|
|
fb_fi_vres_write(480);
|
|
fb_fi_vsync_start_write(492);
|
|
fb_fi_vsync_end_write(494);
|
|
fb_fi_vscan_write(525);
|
|
break;
|
|
case FB_MODE_800_600: // Pixel clock: 50MHz
|
|
fb_hres = 800;
|
|
fb_vres = 600;
|
|
clock_m = 2;
|
|
clock_d = 2;
|
|
fb_fi_hres_write(800);
|
|
fb_fi_hsync_start_write(848);
|
|
fb_fi_hsync_end_write(976);
|
|
fb_fi_hscan_write(1040);
|
|
fb_fi_vres_write(600);
|
|
fb_fi_vsync_start_write(636);
|
|
fb_fi_vsync_end_write(642);
|
|
fb_fi_vscan_write(665);
|
|
break;
|
|
case FB_MODE_1024_768: // Pixel clock: 65MHz
|
|
fb_hres = 1024;
|
|
fb_vres = 768;
|
|
clock_m = 13;
|
|
clock_d = 10;
|
|
fb_fi_hres_write(1024);
|
|
fb_fi_hsync_start_write(1048);
|
|
fb_fi_hsync_end_write(1184);
|
|
fb_fi_hscan_write(1344);
|
|
fb_fi_vres_write(768);
|
|
fb_fi_vsync_start_write(772);
|
|
fb_fi_vsync_end_write(778);
|
|
fb_fi_vscan_write(807);
|
|
break;
|
|
case FB_MODE_1920_1080: // Pixel clock: 148MHz
|
|
fb_hres = 1920;
|
|
fb_vres = 1080;
|
|
clock_m = 74;
|
|
clock_d = 25;
|
|
fb_fi_hres_write(1920);
|
|
fb_fi_hsync_start_write(2008);
|
|
fb_fi_hsync_end_write(2052);
|
|
fb_fi_hscan_write(2200);
|
|
fb_fi_vres_write(1080);
|
|
fb_fi_vsync_start_write(1084);
|
|
fb_fi_vsync_end_write(1089);
|
|
fb_fi_vscan_write(1125);
|
|
break;
|
|
}
|
|
fb_dma0_length_write(fb_hres*fb_vres*4);
|
|
fb_dma1_length_write(fb_hres*fb_vres*4);
|
|
|
|
fb_clkgen_write(0x1, clock_d-1);
|
|
fb_clkgen_write(0x3, clock_m-1);
|
|
crg_send_go_write(1);
|
|
printf("waiting for PROGDONE...");
|
|
while(!(crg_status_read() & CLKGEN_STATUS_PROGDONE));
|
|
printf("ok\n");
|
|
printf("waiting for LOCKED...");
|
|
while(!(crg_status_read() & CLKGEN_STATUS_LOCKED));
|
|
printf("ok\n");
|
|
|
|
printf("VGA: mode set to %dx%d\n", fb_hres, fb_vres);
|
|
}
|
|
|
|
void fb_enable(int en)
|
|
{
|
|
fb_enable_write(!!en);
|
|
}
|