static void rda5802_set_frequency(int freq)
{
int i;
uint16_t readchan;
/* check BAND and spacings */
int start = CHANNEL_BANDr(cache[CHANNEL]) & 1 ? 76000000 : 87000000;
int chan = (freq - start) / 50000;
for (i = 0; i < 5; i++) {
/* tune and wait a bit */
rda5802_write_masked(CHANNEL, CHANNEL_CHANw(chan) | CHANNEL_TUNE,
CHANNEL_CHAN | CHANNEL_TUNE);
rda5802_write_cache();
sleep(HZ * 70 / 1000);
rda5802_write_clear(CHANNEL, CHANNEL_TUNE);
rda5802_write_cache();
/* check if tuning was successful */
readchan = rda5802_read_reg(READCHAN);
if (readchan & READCHAN_STC) {
if (READCHAN_READCHANr(readchan) == chan) {
break;
}
}
}
}
static void rda5802_set_frequency(int freq)
{
int i;
uint16_t readchan;
static const int spacings[] = {100000, 200000, 50000, 50000};
static const int bandstart[] = {87000000, 76000000, 76000000, 65000000};
/* calculate channel number */
int start = bandstart[CHANNEL_BANDr(cache[CHANNEL])];
int space = spacings[CHANNEL_SPACEr(cache[CHANNEL])];
int chan = (freq - start) / space;
for (i = 0; i < 5; i++) {
/* tune and wait a bit */
rda5802_write_masked(CHANNEL, CHANNEL_CHANw(chan) | CHANNEL_TUNE,
CHANNEL_CHAN | CHANNEL_TUNE);
rda5802_write_cache();
sleep(HZ * 70 / 1000);
rda5802_write_clear(CHANNEL, CHANNEL_TUNE);
rda5802_write_cache();
/* check if tuning was successful */
readchan = rda5802_read_reg(READCHAN);
if (readchan & READCHAN_STC) {
if (READCHAN_READCHANr(readchan) == chan) {
break;
}
}
}
}
static void rda5802_sleep(int snooze)
{
if (snooze) {
rda5802_write_clear(POWERCFG, POWERCFG_ENABLE);
}
else {
rda5802_write_set(POWERCFG, POWERCFG_ENABLE);
}
rda5802_write_cache();
}
void rda5802_init(void)
{
if (rda5802_detect()) {
tuner_present = true;
/* soft-reset */
rda5802_write_set(POWERCFG, POWERCFG_SOFT_RESET);
rda5802_write(1);
rda5802_write_clear(POWERCFG, POWERCFG_SOFT_RESET);
sleep(HZ * 10 / 1000);
/* write initialisation values */
rda5802_write(8);
sleep(HZ * 70 / 1000);
}
}
