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litex/software/videomixer/dvisamplerX.c

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#include <stdio.h>
#include <stdlib.h>
#include <irq.h>
#include <uart.h>
#include <time.h>
#include <hw/csr.h>
#include <hw/flags.h>
#include "dvisamplerX.h"
int dvisamplerX_debug;
#define FRAMEBUFFER_COUNT 4
#define FRAMEBUFFER_MASK (FRAMEBUFFER_COUNT - 1)
static unsigned int dvisamplerX_framebuffers[FRAMEBUFFER_COUNT][1280*720] __attribute__((aligned(16)));
static int dvisamplerX_fb_slot_indexes[2];
static int dvisamplerX_next_fb_index;
void dvisamplerX_isr(void)
{
int fb_index = -1;
if(dvisamplerX_dma_slot0_status_read() == DVISAMPLER_SLOT_PENDING) {
fb_index = dvisamplerX_fb_slot_indexes[0];
dvisamplerX_fb_slot_indexes[0] = dvisamplerX_next_fb_index;
dvisamplerX_dma_slot0_address_write((unsigned int)dvisamplerX_framebuffers[dvisamplerX_next_fb_index]);
dvisamplerX_dma_slot0_status_write(DVISAMPLER_SLOT_LOADED);
dvisamplerX_next_fb_index = (dvisamplerX_next_fb_index + 1) & FRAMEBUFFER_MASK;
}
if(dvisamplerX_dma_slot1_status_read() == DVISAMPLER_SLOT_PENDING) {
fb_index = dvisamplerX_fb_slot_indexes[1];
dvisamplerX_fb_slot_indexes[1] = dvisamplerX_next_fb_index;
dvisamplerX_dma_slot1_address_write((unsigned int)dvisamplerX_framebuffers[dvisamplerX_next_fb_index]);
dvisamplerX_dma_slot1_status_write(DVISAMPLER_SLOT_LOADED);
dvisamplerX_next_fb_index = (dvisamplerX_next_fb_index + 1) & FRAMEBUFFER_MASK;
}
if(fb_index != -1)
fb_dmaX_base_write((unsigned int)dvisamplerX_framebuffers[fb_index]);
}
static int dvisamplerX_connected;
static int dvisamplerX_locked;
void dvisamplerX_init_video(int hres, int vres)
{
unsigned int mask;
dvisamplerX_clocking_pll_reset_write(1);
dvisamplerX_connected = dvisamplerX_locked = 0;
dvisamplerX_dma_ev_pending_write(dvisamplerX_dma_ev_pending_read());
dvisamplerX_dma_ev_enable_write(0x3);
mask = irq_getmask();
mask |= 1 << DVISAMPLERX_INTERRUPT;
irq_setmask(mask);
dvisamplerX_dma_frame_size_write(hres*vres*4);
dvisamplerX_fb_slot_indexes[0] = 0;
dvisamplerX_dma_slot0_address_write((unsigned int)dvisamplerX_framebuffers[0]);
dvisamplerX_dma_slot0_status_write(DVISAMPLER_SLOT_LOADED);
dvisamplerX_fb_slot_indexes[1] = 1;
dvisamplerX_dma_slot1_address_write((unsigned int)dvisamplerX_framebuffers[1]);
dvisamplerX_dma_slot1_status_write(DVISAMPLER_SLOT_LOADED);
dvisamplerX_next_fb_index = 2;
fb_dmaX_base_write((unsigned int)dvisamplerX_framebuffers[3]);
}
static int dvisamplerX_d0, dvisamplerX_d1, dvisamplerX_d2;
void dvisamplerX_print_status(void)
{
dvisamplerX_data0_wer_update_write(1);
dvisamplerX_data1_wer_update_write(1);
dvisamplerX_data2_wer_update_write(1);
printf("dvisamplerX: ph:%4d %4d %4d // charsync:%d%d%d [%d %d %d] // WER:%3d %3d %3d // chansync:%d // res:%dx%d\n",
dvisamplerX_d0, dvisamplerX_d1, dvisamplerX_d2,
dvisamplerX_data0_charsync_char_synced_read(),
dvisamplerX_data1_charsync_char_synced_read(),
dvisamplerX_data2_charsync_char_synced_read(),
dvisamplerX_data0_charsync_ctl_pos_read(),
dvisamplerX_data1_charsync_ctl_pos_read(),
dvisamplerX_data2_charsync_ctl_pos_read(),
dvisamplerX_data0_wer_value_read(),
dvisamplerX_data1_wer_value_read(),
dvisamplerX_data2_wer_value_read(),
dvisamplerX_chansync_channels_synced_read(),
dvisamplerX_resdetection_hres_read(),
dvisamplerX_resdetection_vres_read());
}
static int wait_idelays(void)
{
int ev;
ev = 0;
elapsed(&ev, 1);
while(dvisamplerX_data0_cap_dly_busy_read()
|| dvisamplerX_data1_cap_dly_busy_read()
|| dvisamplerX_data2_cap_dly_busy_read()) {
if(elapsed(&ev, identifier_frequency_read() >> 6) == 0) {
printf("dvisamplerX: IDELAY busy timeout\n");
return 0;
}
}
return 1;
}
int dvisamplerX_calibrate_delays(void)
{
dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_MASTER_CAL|DVISAMPLER_DELAY_SLAVE_CAL);
dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_MASTER_CAL|DVISAMPLER_DELAY_SLAVE_CAL);
dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_MASTER_CAL|DVISAMPLER_DELAY_SLAVE_CAL);
if(!wait_idelays())
return 0;
dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_MASTER_RST|DVISAMPLER_DELAY_SLAVE_RST);
dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_MASTER_RST|DVISAMPLER_DELAY_SLAVE_RST);
dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_MASTER_RST|DVISAMPLER_DELAY_SLAVE_RST);
dvisamplerX_data0_cap_phase_reset_write(1);
dvisamplerX_data1_cap_phase_reset_write(1);
dvisamplerX_data2_cap_phase_reset_write(1);
dvisamplerX_d0 = dvisamplerX_d1 = dvisamplerX_d2 = 0;
return 1;
}
int dvisamplerX_adjust_phase(void)
{
switch(dvisamplerX_data0_cap_phase_read()) {
case DVISAMPLER_TOO_LATE:
dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
if(!wait_idelays())
return 0;
dvisamplerX_d0--;
dvisamplerX_data0_cap_phase_reset_write(1);
break;
case DVISAMPLER_TOO_EARLY:
dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
if(!wait_idelays())
return 0;
dvisamplerX_d0++;
dvisamplerX_data0_cap_phase_reset_write(1);
break;
}
switch(dvisamplerX_data1_cap_phase_read()) {
case DVISAMPLER_TOO_LATE:
dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
if(!wait_idelays())
return 0;
dvisamplerX_d1--;
dvisamplerX_data1_cap_phase_reset_write(1);
break;
case DVISAMPLER_TOO_EARLY:
dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
if(!wait_idelays())
return 0;
dvisamplerX_d1++;
dvisamplerX_data1_cap_phase_reset_write(1);
break;
}
switch(dvisamplerX_data2_cap_phase_read()) {
case DVISAMPLER_TOO_LATE:
dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
if(!wait_idelays())
return 0;
dvisamplerX_d2--;
dvisamplerX_data2_cap_phase_reset_write(1);
break;
case DVISAMPLER_TOO_EARLY:
dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
if(!wait_idelays())
return 0;
dvisamplerX_d2++;
dvisamplerX_data2_cap_phase_reset_write(1);
break;
}
return 1;
}
int dvisamplerX_init_phase(void)
{
int o_d0, o_d1, o_d2;
int i, j;
for(i=0;i<100;i++) {
o_d0 = dvisamplerX_d0;
o_d1 = dvisamplerX_d1;
o_d2 = dvisamplerX_d2;
for(j=0;j<1000;j++) {
if(!dvisamplerX_adjust_phase())
return 0;
}
if((abs(dvisamplerX_d0 - o_d0) < 4) && (abs(dvisamplerX_d1 - o_d1) < 4) && (abs(dvisamplerX_d2 - o_d2) < 4))
return 1;
}
return 0;
}
int dvisamplerX_phase_startup(void)
{
int ret;
int attempts;
attempts = 0;
while(1) {
attempts++;
dvisamplerX_calibrate_delays();
if(dvisamplerX_debug)
printf("dvisamplerX: delays calibrated\n");
ret = dvisamplerX_init_phase();
if(ret) {
if(dvisamplerX_debug)
printf("dvisamplerX: phase init OK\n");
return 1;
} else {
printf("dvisamplerX: phase init failed\n");
if(attempts > 3) {
printf("dvisamplerX: giving up\n");
dvisamplerX_calibrate_delays();
return 0;
}
}
}
}
static void dvisamplerX_check_overflow(void)
{
if(dvisamplerX_frame_overflow_read()) {
printf("dvisamplerX: FIFO overflow\n");
dvisamplerX_frame_overflow_write(1);
}
}
static int dvisamplerX_clocking_locked_filtered(void)
{
static int lock_start_time;
static int lock_status;
if(dvisamplerX_clocking_locked_read()) {
switch(lock_status) {
case 0:
elapsed(&lock_start_time, -1);
lock_status = 1;
break;
case 1:
if(elapsed(&lock_start_time, identifier_frequency_read()/4))
lock_status = 2;
break;
case 2:
return 1;
}
} else
lock_status = 0;
return 0;
}
void dvisamplerX_service(void)
{
static int last_event;
if(dvisamplerX_connected) {
if(!dvisamplerX_edid_hpd_notif_read()) {
if(dvisamplerX_debug)
printf("dvisamplerX: disconnected\n");
dvisamplerX_connected = 0;
dvisamplerX_locked = 0;
dvisamplerX_clocking_pll_reset_write(1);
} else {
if(dvisamplerX_locked) {
if(dvisamplerX_clocking_locked_filtered()) {
if(elapsed(&last_event, identifier_frequency_read()/2)) {
dvisamplerX_adjust_phase();
if(dvisamplerX_debug)
dvisamplerX_print_status();
}
} else {
if(dvisamplerX_debug)
printf("dvisamplerX: lost PLL lock\n");
dvisamplerX_locked = 0;
}
} else {
if(dvisamplerX_clocking_locked_filtered()) {
if(dvisamplerX_debug)
printf("dvisamplerX: PLL locked\n");
dvisamplerX_phase_startup();
if(dvisamplerX_debug)
dvisamplerX_print_status();
dvisamplerX_locked = 1;
}
}
}
} else {
if(dvisamplerX_edid_hpd_notif_read()) {
if(dvisamplerX_debug)
printf("dvisamplerX: connected\n");
dvisamplerX_connected = 1;
dvisamplerX_clocking_pll_reset_write(0);
}
}
dvisamplerX_check_overflow();
}
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