static HAL_CHANNEL_INTERNAL *
getchannel(struct ath_hal *ah, const HAL_CHANNEL *c)
{
#define CHAN_FLAGS (CHANNEL_ALL | CHANNEL_HALF | CHANNEL_QUARTER)
HAL_CHANNEL_INTERNAL *base, *cc;
int flags = c->channel_flags & CHAN_FLAGS;
int n, lim;
/*
* Check current channel to avoid the lookup.
*/
cc = AH_PRIVATE(ah)->ah_curchan;
if (cc != AH_NULL && cc->channel == c->channel &&
(cc->channel_flags & CHAN_FLAGS) == flags) {
return cc;
}
/* binary search based on known sorting order */
base = AH_TABLES(ah)->ah_channels;
n = AH_PRIVATE(ah)->ah_nchan;
/* binary search based on known sorting order */
for (lim = n; lim != 0; lim >>= 1) {
int d;
cc = &base[lim >> 1];
d = c->channel - cc->channel;
if (d == 0) {
if ((cc->channel_flags & CHAN_FLAGS) == flags) {
return cc;
}
d = flags - (cc->channel_flags & CHAN_FLAGS);
}
HDPRINTF(ah, HAL_DBG_DFS, "%s: channel %u/0x%x d %d\n", __func__,
cc->channel, cc->channel_flags, d);
if (d > 0) {
base = cc + 1;
lim--;
}
}
HDPRINTF(ah, HAL_DBG_DFS, "%s: no match for %u/0x%x\n",
__func__, c->channel, c->channel_flags);
return AH_NULL;
#undef CHAN_FLAGS
}
HAL_CHANNEL *ar9300GetExtensionChannel(struct ath_hal *ah)
{
struct ath_hal_private *ahp = AH_PRIVATE(ah);
struct ath_hal_private_tables *aht = AH_TABLES(ah);
int i = 0;
HAL_CHANNEL_INTERNAL *ichan = AH_NULL;
CHAN_CENTERS centers;
ichan = ahp->ah_curchan;
ar9300GetChannelCenters(ah, ichan, ¢ers);
if (centers.ctl_center == centers.ext_center) {
return AH_NULL;
}
for (i = 0; i < ahp->ah_nchan; i++) {
ichan = &aht->ah_channels[i];
if (ichan->channel == centers.ext_center) {
return (HAL_CHANNEL*)ichan;
}
}
return AH_NULL;
}
