/*
* This routine performs the periodic noise floor calibration function
* that is used to adjust and optimize the chip performance. This
* takes environmental changes (location, temperature) into account.
* When the task is complete, it reschedules itself depending on the
* appropriate interval that was calculated.
*/
void ath_ani_calibrate(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *)data;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
bool longcal = false;
bool shortcal = false;
bool aniflag = false;
unsigned int timestamp = jiffies_to_msecs(jiffies);
u32 cal_interval, short_cal_interval, long_cal_interval;
unsigned long flags;
if (ah->caldata && ah->caldata->nfcal_interference)
long_cal_interval = ATH_LONG_CALINTERVAL_INT;
else
long_cal_interval = ATH_LONG_CALINTERVAL;
short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
/* Only calibrate if awake */
if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
goto set_timer;
ath9k_ps_wakeup(sc);
/* Long calibration runs independently of short calibration. */
if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
longcal = true;
ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
common->ani.longcal_timer = timestamp;
}
/* Short calibration applies only while caldone is false */
if (!common->ani.caldone) {
if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
shortcal = true;
ath_dbg(common, ATH_DBG_ANI,
"shortcal @%lu\n", jiffies);
common->ani.shortcal_timer = timestamp;
common->ani.resetcal_timer = timestamp;
}
} else {
if ((timestamp - common->ani.resetcal_timer) >=
ATH_RESTART_CALINTERVAL) {
common->ani.caldone = ath9k_hw_reset_calvalid(ah);
if (common->ani.caldone)
common->ani.resetcal_timer = timestamp;
}
}
/* Verify whether we must check ANI */
if ((timestamp - common->ani.checkani_timer) >=
ah->config.ani_poll_interval) {
aniflag = true;
common->ani.checkani_timer = timestamp;
}
/* Call ANI routine if necessary */
if (aniflag) {
spin_lock_irqsave(&common->cc_lock, flags);
ath9k_hw_ani_monitor(ah, ah->curchan);
ath_update_survey_stats(sc);
spin_unlock_irqrestore(&common->cc_lock, flags);
}
/* Perform calibration if necessary */
if (longcal || shortcal) {
common->ani.caldone =
ath9k_hw_calibrate(ah, ah->curchan,
common->rx_chainmask, longcal);
}
ath9k_ps_restore(sc);
set_timer:
/*
* Set timer interval based on previous results.
* The interval must be the shortest necessary to satisfy ANI,
* short calibration and long calibration.
*/
cal_interval = ATH_LONG_CALINTERVAL;
if (sc->sc_ah->config.enable_ani)
cal_interval = min(cal_interval,
(u32)ah->config.ani_poll_interval);
if (!common->ani.caldone)
cal_interval = min(cal_interval, (u32)short_cal_interval);
mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) {
if (!ah->caldata->paprd_done)
ieee80211_queue_work(sc->hw, &sc->paprd_work);
else if (!ah->paprd_table_write_done)
ath_paprd_activate(sc);
}
}
/*
* ANI performs periodic noise floor calibration
* that is used to adjust and optimize the chip performance. This
* takes environmental changes (location, temperature) into account.
* When the task is complete, it reschedules itself depending on the
* appropriate interval that was calculated.
*/
void ath_ani_calibrate(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *)data;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
bool longcal = false;
bool shortcal = false;
bool aniflag = false;
unsigned int timestamp = jiffies_to_msecs(jiffies);
u32 cal_interval, short_cal_interval, long_cal_interval;
unsigned long flags;
if (ah->caldata && test_bit(NFCAL_INTF, &ah->caldata->cal_flags))
long_cal_interval = ATH_LONG_CALINTERVAL_INT;
else
long_cal_interval = ATH_LONG_CALINTERVAL;
short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
/* Only calibrate if awake */
if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE) {
if (++ah->ani_skip_count >= ATH_ANI_MAX_SKIP_COUNT) {
spin_lock_irqsave(&sc->sc_pm_lock, flags);
sc->ps_flags |= PS_WAIT_FOR_ANI;
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
goto set_timer;
}
ah->ani_skip_count = 0;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
sc->ps_flags &= ~PS_WAIT_FOR_ANI;
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
ath9k_ps_wakeup(sc);
/* Long calibration runs independently of short calibration. */
if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) {
longcal = true;
common->ani.longcal_timer = timestamp;
}
/* Short calibration applies only while caldone is false */
if (!common->ani.caldone) {
if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
shortcal = true;
common->ani.shortcal_timer = timestamp;
common->ani.resetcal_timer = timestamp;
}
} else {
if ((timestamp - common->ani.resetcal_timer) >=
ATH_RESTART_CALINTERVAL) {
common->ani.caldone = ath9k_hw_reset_calvalid(ah);
if (common->ani.caldone)
common->ani.resetcal_timer = timestamp;
}
}
/* Verify whether we must check ANI */
if ((timestamp - common->ani.checkani_timer) >= ah->config.ani_poll_interval) {
aniflag = true;
common->ani.checkani_timer = timestamp;
}
/* Call ANI routine if necessary */
if (aniflag) {
spin_lock_irqsave(&common->cc_lock, flags);
ath9k_hw_ani_monitor(ah, ah->curchan);
ath_update_survey_stats(sc);
spin_unlock_irqrestore(&common->cc_lock, flags);
}
/* Perform calibration if necessary */
if (longcal || shortcal) {
common->ani.caldone =
ath9k_hw_calibrate(ah, ah->curchan,
ah->rxchainmask, longcal);
}
ath_dbg(common, ANI,
"Calibration @%lu finished: %s %s %s, caldone: %s\n",
jiffies,
longcal ? "long" : "", shortcal ? "short" : "",
aniflag ? "ani" : "", common->ani.caldone ? "true" : "false");
ath9k_ps_restore(sc);
set_timer:
/*
* Set timer interval based on previous results.
* The interval must be the shortest necessary to satisfy ANI,
* short calibration and long calibration.
*/
cal_interval = ATH_LONG_CALINTERVAL;
cal_interval = min(cal_interval, (u32)ah->config.ani_poll_interval);
if (!common->ani.caldone)
cal_interval = min(cal_interval, (u32)short_cal_interval);
mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
if (ar9003_is_paprd_enabled(ah) && ah->caldata) {
if (!test_bit(PAPRD_DONE, &ah->caldata->cal_flags)) {
ieee80211_queue_work(sc->hw, &sc->paprd_work);
} else if (!ah->paprd_table_write_done) {
ath9k_ps_wakeup(sc);
ath_paprd_activate(sc);
ath9k_ps_restore(sc);
}
}
}
void ath_paprd_calibrate(struct work_struct *work)
{
struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
struct ieee80211_hw *hw = sc->hw;
struct ath_hw *ah = sc->sc_ah;
struct ieee80211_hdr *hdr;
struct sk_buff *skb = NULL;
struct ath9k_hw_cal_data *caldata = ah->caldata;
struct ath_common *common = ath9k_hw_common(ah);
int ftype;
int chain_ok = 0;
int chain;
int len = 1800;
if (!caldata)
return;
ath9k_ps_wakeup(sc);
if (ar9003_paprd_init_table(ah) < 0)
goto fail_paprd;
skb = alloc_skb(len, GFP_KERNEL);
if (!skb)
goto fail_paprd;
skb_put(skb, len);
memset(skb->data, 0, len);
hdr = (struct ieee80211_hdr *)skb->data;
ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
hdr->frame_control = cpu_to_le16(ftype);
hdr->duration_id = cpu_to_le16(10);
memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
if (!(common->tx_chainmask & BIT(chain)))
continue;
chain_ok = 0;
ath_dbg(common, ATH_DBG_CALIBRATE,
"Sending PAPRD frame for thermal measurement "
"on chain %d\n", chain);
if (!ath_paprd_send_frame(sc, skb, chain))
goto fail_paprd;
ar9003_paprd_setup_gain_table(ah, chain);
ath_dbg(common, ATH_DBG_CALIBRATE,
"Sending PAPRD training frame on chain %d\n", chain);
if (!ath_paprd_send_frame(sc, skb, chain))
goto fail_paprd;
if (!ar9003_paprd_is_done(ah)) {
ath_dbg(common, ATH_DBG_CALIBRATE,
"PAPRD not yet done on chain %d\n", chain);
break;
}
if (ar9003_paprd_create_curve(ah, caldata, chain)) {
ath_dbg(common, ATH_DBG_CALIBRATE,
"PAPRD create curve failed on chain %d\n",
chain);
break;
}
chain_ok = 1;
}
kfree_skb(skb);
if (chain_ok) {
caldata->paprd_done = true;
ath_paprd_activate(sc);
}
fail_paprd:
ath9k_ps_restore(sc);
}
void ath_paprd_calibrate(struct work_struct *work)
{
struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work);
struct ieee80211_hw *hw = sc->hw;
struct ath_hw *ah = sc->sc_ah;
struct ieee80211_hdr *hdr;
struct sk_buff *skb = NULL;
struct ath9k_hw_cal_data *caldata = ah->caldata;
struct ath_common *common = ath9k_hw_common(ah);
int ftype;
int chain_ok = 0;
int chain;
int len = 1800;
int ret;
if (!caldata ||
!test_bit(PAPRD_PACKET_SENT, &caldata->cal_flags) ||
test_bit(PAPRD_DONE, &caldata->cal_flags)) {
ath_dbg(common, CALIBRATE, "Skipping PAPRD calibration\n");
return;
}
ath9k_ps_wakeup(sc);
if (ar9003_paprd_init_table(ah) < 0)
goto fail_paprd;
skb = alloc_skb(len, GFP_KERNEL);
if (!skb)
goto fail_paprd;
skb_put(skb, len);
memset(skb->data, 0, len);
hdr = (struct ieee80211_hdr *)skb->data;
ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC;
hdr->frame_control = cpu_to_le16(ftype);
hdr->duration_id = cpu_to_le16(10);
memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
if (!(ah->txchainmask & BIT(chain)))
continue;
chain_ok = 0;
ar9003_paprd_setup_gain_table(ah, chain);
ath_dbg(common, CALIBRATE,
"Sending PAPRD training frame on chain %d\n", chain);
if (!ath_paprd_send_frame(sc, skb, chain))
goto fail_paprd;
if (!ar9003_paprd_is_done(ah)) {
ath_dbg(common, CALIBRATE,
"PAPRD not yet done on chain %d\n", chain);
break;
}
ret = ar9003_paprd_create_curve(ah, caldata, chain);
if (ret == -EINPROGRESS) {
ath_dbg(common, CALIBRATE,
"PAPRD curve on chain %d needs to be re-trained\n",
chain);
break;
} else if (ret) {
ath_dbg(common, CALIBRATE,
"PAPRD create curve failed on chain %d\n",
chain);
break;
}
chain_ok = 1;
}
kfree_skb(skb);
if (chain_ok) {
set_bit(PAPRD_DONE, &caldata->cal_flags);
ath_paprd_activate(sc);
}
fail_paprd:
ath9k_ps_restore(sc);
}
