+++ /dev/null
-/*
- * Copyright (c) 2008, Atheros Communications Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include "core.h"
-#include "regd.h"
-
-static u32 ath_chainmask_sel_up_rssi_thres =
- ATH_CHAINMASK_SEL_UP_RSSI_THRES;
-static u32 ath_chainmask_sel_down_rssi_thres =
- ATH_CHAINMASK_SEL_DOWN_RSSI_THRES;
-static u32 ath_chainmask_sel_period =
- ATH_CHAINMASK_SEL_TIMEOUT;
-
-/* return bus cachesize in 4B word units */
-
-static void bus_read_cachesize(struct ath_softc *sc, int *csz)
-{
- u8 u8tmp;
-
- pci_read_config_byte(sc->pdev, PCI_CACHE_LINE_SIZE, (u8 *)&u8tmp);
- *csz = (int)u8tmp;
-
- /*
- * This check was put in to avoid "unplesant" consequences if
- * the bootrom has not fully initialized all PCI devices.
- * Sometimes the cache line size register is not set
- */
-
- if (*csz == 0)
- *csz = DEFAULT_CACHELINE >> 2; /* Use the default size */
-}
-
-static u8 parse_mpdudensity(u8 mpdudensity)
-{
- /*
- * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
- * 0 for no restriction
- * 1 for 1/4 us
- * 2 for 1/2 us
- * 3 for 1 us
- * 4 for 2 us
- * 5 for 4 us
- * 6 for 8 us
- * 7 for 16 us
- */
- switch (mpdudensity) {
- case 0:
- return 0;
- case 1:
- case 2:
- case 3:
- /* Our lower layer calculations limit our precision to
- 1 microsecond */
- return 1;
- case 4:
- return 2;
- case 5:
- return 4;
- case 6:
- return 8;
- case 7:
- return 16;
- default:
- return 0;
- }
-}
-
-/*
- * Set current operating mode
-*/
-static void ath_setcurmode(struct ath_softc *sc, enum wireless_mode mode)
-{
- sc->sc_curmode = mode;
- /*
- * All protection frames are transmited at 2Mb/s for
- * 11g, otherwise at 1Mb/s.
- * XXX select protection rate index from rate table.
- */
- sc->sc_protrix = (mode == ATH9K_MODE_11G ? 1 : 0);
-}
-
-/*
- * Set up rate table (legacy rates)
- */
-static void ath_setup_rates(struct ath_softc *sc, enum ieee80211_band band)
-{
- struct ath_rate_table *rate_table = NULL;
- struct ieee80211_supported_band *sband;
- struct ieee80211_rate *rate;
- int i, maxrates;
-
- switch (band) {
- case IEEE80211_BAND_2GHZ:
- rate_table = sc->hw_rate_table[ATH9K_MODE_11G];
- break;
- case IEEE80211_BAND_5GHZ:
- rate_table = sc->hw_rate_table[ATH9K_MODE_11A];
- break;
- default:
- break;
- }
-
- if (rate_table == NULL)
- return;
-
- sband = &sc->sbands[band];
- rate = sc->rates[band];
-
- if (rate_table->rate_cnt > ATH_RATE_MAX)
- maxrates = ATH_RATE_MAX;
- else
- maxrates = rate_table->rate_cnt;
-
- for (i = 0; i < maxrates; i++) {
- rate[i].bitrate = rate_table->info[i].ratekbps / 100;
- rate[i].hw_value = rate_table->info[i].ratecode;
- sband->n_bitrates++;
- DPRINTF(sc, ATH_DBG_CONFIG,
- "%s: Rate: %2dMbps, ratecode: %2d\n",
- __func__,
- rate[i].bitrate / 10,
- rate[i].hw_value);
- }
-}
-
-/*
- * Set up channel list
- */
-static int ath_setup_channels(struct ath_softc *sc)
-{
- struct ath_hal *ah = sc->sc_ah;
- int nchan, i, a = 0, b = 0;
- u8 regclassids[ATH_REGCLASSIDS_MAX];
- u32 nregclass = 0;
- struct ieee80211_supported_band *band_2ghz;
- struct ieee80211_supported_band *band_5ghz;
- struct ieee80211_channel *chan_2ghz;
- struct ieee80211_channel *chan_5ghz;
- struct ath9k_channel *c;
-
- /* Fill in ah->ah_channels */
- if (!ath9k_regd_init_channels(ah, ATH_CHAN_MAX, (u32 *)&nchan,
- regclassids, ATH_REGCLASSIDS_MAX,
- &nregclass, CTRY_DEFAULT, false, 1)) {
- u32 rd = ah->ah_currentRD;
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to collect channel list; "
- "regdomain likely %u country code %u\n",
- __func__, rd, CTRY_DEFAULT);
- return -EINVAL;
- }
-
- band_2ghz = &sc->sbands[IEEE80211_BAND_2GHZ];
- band_5ghz = &sc->sbands[IEEE80211_BAND_5GHZ];
- chan_2ghz = sc->channels[IEEE80211_BAND_2GHZ];
- chan_5ghz = sc->channels[IEEE80211_BAND_5GHZ];
-
- for (i = 0; i < nchan; i++) {
- c = &ah->ah_channels[i];
- if (IS_CHAN_2GHZ(c)) {
- chan_2ghz[a].band = IEEE80211_BAND_2GHZ;
- chan_2ghz[a].center_freq = c->channel;
- chan_2ghz[a].max_power = c->maxTxPower;
-
- if (c->privFlags & CHANNEL_DISALLOW_ADHOC)
- chan_2ghz[a].flags |= IEEE80211_CHAN_NO_IBSS;
- if (c->channelFlags & CHANNEL_PASSIVE)
- chan_2ghz[a].flags |= IEEE80211_CHAN_PASSIVE_SCAN;
-
- band_2ghz->n_channels = ++a;
-
- DPRINTF(sc, ATH_DBG_CONFIG,
- "%s: 2MHz channel: %d, "
- "channelFlags: 0x%x\n",
- __func__, c->channel, c->channelFlags);
- } else if (IS_CHAN_5GHZ(c)) {
- chan_5ghz[b].band = IEEE80211_BAND_5GHZ;
- chan_5ghz[b].center_freq = c->channel;
- chan_5ghz[b].max_power = c->maxTxPower;
-
- if (c->privFlags & CHANNEL_DISALLOW_ADHOC)
- chan_5ghz[b].flags |= IEEE80211_CHAN_NO_IBSS;
- if (c->channelFlags & CHANNEL_PASSIVE)
- chan_5ghz[b].flags |= IEEE80211_CHAN_PASSIVE_SCAN;
-
- band_5ghz->n_channels = ++b;
-
- DPRINTF(sc, ATH_DBG_CONFIG,
- "%s: 5MHz channel: %d, "
- "channelFlags: 0x%x\n",
- __func__, c->channel, c->channelFlags);
- }
- }
-
- return 0;
-}
-
-/*
- * Determine mode from channel flags
- *
- * This routine will provide the enumerated WIRELESSS_MODE value based
- * on the settings of the channel flags. If no valid set of flags
- * exist, the lowest mode (11b) is selected.
-*/
-
-static enum wireless_mode ath_chan2mode(struct ath9k_channel *chan)
-{
- if (chan->chanmode == CHANNEL_A)
- return ATH9K_MODE_11A;
- else if (chan->chanmode == CHANNEL_G)
- return ATH9K_MODE_11G;
- else if (chan->chanmode == CHANNEL_B)
- return ATH9K_MODE_11B;
- else if (chan->chanmode == CHANNEL_A_HT20)
- return ATH9K_MODE_11NA_HT20;
- else if (chan->chanmode == CHANNEL_G_HT20)
- return ATH9K_MODE_11NG_HT20;
- else if (chan->chanmode == CHANNEL_A_HT40PLUS)
- return ATH9K_MODE_11NA_HT40PLUS;
- else if (chan->chanmode == CHANNEL_A_HT40MINUS)
- return ATH9K_MODE_11NA_HT40MINUS;
- else if (chan->chanmode == CHANNEL_G_HT40PLUS)
- return ATH9K_MODE_11NG_HT40PLUS;
- else if (chan->chanmode == CHANNEL_G_HT40MINUS)
- return ATH9K_MODE_11NG_HT40MINUS;
-
- WARN_ON(1); /* should not get here */
-
- return ATH9K_MODE_11B;
-}
-
-/*
- * Set the current channel
- *
- * Set/change channels. If the channel is really being changed, it's done
- * by reseting the chip. To accomplish this we must first cleanup any pending
- * DMA, then restart stuff after a la ath_init.
-*/
-int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan)
-{
- struct ath_hal *ah = sc->sc_ah;
- bool fastcc = true, stopped;
-
- if (sc->sc_flags & SC_OP_INVALID) /* the device is invalid or removed */
- return -EIO;
-
- DPRINTF(sc, ATH_DBG_CONFIG,
- "%s: %u (%u MHz) -> %u (%u MHz), cflags:%x\n",
- __func__,
- ath9k_hw_mhz2ieee(ah, sc->sc_ah->ah_curchan->channel,
- sc->sc_ah->ah_curchan->channelFlags),
- sc->sc_ah->ah_curchan->channel,
- ath9k_hw_mhz2ieee(ah, hchan->channel, hchan->channelFlags),
- hchan->channel, hchan->channelFlags);
-
- if (hchan->channel != sc->sc_ah->ah_curchan->channel ||
- hchan->channelFlags != sc->sc_ah->ah_curchan->channelFlags ||
- (sc->sc_flags & SC_OP_CHAINMASK_UPDATE) ||
- (sc->sc_flags & SC_OP_FULL_RESET)) {
- int status;
- /*
- * This is only performed if the channel settings have
- * actually changed.
- *
- * To switch channels clear any pending DMA operations;
- * wait long enough for the RX fifo to drain, reset the
- * hardware at the new frequency, and then re-enable
- * the relevant bits of the h/w.
- */
- ath9k_hw_set_interrupts(ah, 0); /* disable interrupts */
- ath_draintxq(sc, false); /* clear pending tx frames */
- stopped = ath_stoprecv(sc); /* turn off frame recv */
-
- /* XXX: do not flush receive queue here. We don't want
- * to flush data frames already in queue because of
- * changing channel. */
-
- if (!stopped || (sc->sc_flags & SC_OP_FULL_RESET))
- fastcc = false;
-
- spin_lock_bh(&sc->sc_resetlock);
- if (!ath9k_hw_reset(ah, hchan,
- sc->sc_ht_info.tx_chan_width,
- sc->sc_tx_chainmask,
- sc->sc_rx_chainmask,
- sc->sc_ht_extprotspacing,
- fastcc, &status)) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to reset channel %u (%uMhz) "
- "flags 0x%x hal status %u\n", __func__,
- ath9k_hw_mhz2ieee(ah, hchan->channel,
- hchan->channelFlags),
- hchan->channel, hchan->channelFlags, status);
- spin_unlock_bh(&sc->sc_resetlock);
- return -EIO;
- }
- spin_unlock_bh(&sc->sc_resetlock);
-
- sc->sc_flags &= ~SC_OP_CHAINMASK_UPDATE;
- sc->sc_flags &= ~SC_OP_FULL_RESET;
-
- /* Re-enable rx framework */
- if (ath_startrecv(sc) != 0) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to restart recv logic\n", __func__);
- return -EIO;
- }
- /*
- * Change channels and update the h/w rate map
- * if we're switching; e.g. 11a to 11b/g.
- */
- ath_setcurmode(sc, ath_chan2mode(hchan));
-
- ath_update_txpow(sc); /* update tx power state */
- /*
- * Re-enable interrupts.
- */
- ath9k_hw_set_interrupts(ah, sc->sc_imask);
- }
- return 0;
-}
-
-/**********************/
-/* Chainmask Handling */
-/**********************/
-
-static void ath_chainmask_sel_timertimeout(unsigned long data)
-{
- struct ath_chainmask_sel *cm = (struct ath_chainmask_sel *)data;
- cm->switch_allowed = 1;
-}
-
-/* Start chainmask select timer */
-static void ath_chainmask_sel_timerstart(struct ath_chainmask_sel *cm)
-{
- cm->switch_allowed = 0;
- mod_timer(&cm->timer, ath_chainmask_sel_period);
-}
-
-/* Stop chainmask select timer */
-static void ath_chainmask_sel_timerstop(struct ath_chainmask_sel *cm)
-{
- cm->switch_allowed = 0;
- del_timer_sync(&cm->timer);
-}
-
-static void ath_chainmask_sel_init(struct ath_softc *sc, struct ath_node *an)
-{
- struct ath_chainmask_sel *cm = &an->an_chainmask_sel;
-
- memset(cm, 0, sizeof(struct ath_chainmask_sel));
-
- cm->cur_tx_mask = sc->sc_tx_chainmask;
- cm->cur_rx_mask = sc->sc_rx_chainmask;
- cm->tx_avgrssi = ATH_RSSI_DUMMY_MARKER;
- setup_timer(&cm->timer,
- ath_chainmask_sel_timertimeout, (unsigned long) cm);
-}
-
-int ath_chainmask_sel_logic(struct ath_softc *sc, struct ath_node *an)
-{
- struct ath_chainmask_sel *cm = &an->an_chainmask_sel;
-
- /*
- * Disable auto-swtiching in one of the following if conditions.
- * sc_chainmask_auto_sel is used for internal global auto-switching
- * enabled/disabled setting
- */
- if (sc->sc_ah->ah_caps.tx_chainmask != ATH_CHAINMASK_SEL_3X3) {
- cm->cur_tx_mask = sc->sc_tx_chainmask;
- return cm->cur_tx_mask;
- }
-
- if (cm->tx_avgrssi == ATH_RSSI_DUMMY_MARKER)
- return cm->cur_tx_mask;
-
- if (cm->switch_allowed) {
- /* Switch down from tx 3 to tx 2. */
- if (cm->cur_tx_mask == ATH_CHAINMASK_SEL_3X3 &&
- ATH_RSSI_OUT(cm->tx_avgrssi) >=
- ath_chainmask_sel_down_rssi_thres) {
- cm->cur_tx_mask = sc->sc_tx_chainmask;
-
- /* Don't let another switch happen until
- * this timer expires */
- ath_chainmask_sel_timerstart(cm);
- }
- /* Switch up from tx 2 to 3. */
- else if (cm->cur_tx_mask == sc->sc_tx_chainmask &&
- ATH_RSSI_OUT(cm->tx_avgrssi) <=
- ath_chainmask_sel_up_rssi_thres) {
- cm->cur_tx_mask = ATH_CHAINMASK_SEL_3X3;
-
- /* Don't let another switch happen
- * until this timer expires */
- ath_chainmask_sel_timerstart(cm);
- }
- }
-
- return cm->cur_tx_mask;
-}
-
-/*
- * Update tx/rx chainmask. For legacy association,
- * hard code chainmask to 1x1, for 11n association, use
- * the chainmask configuration.
- */
-
-void ath_update_chainmask(struct ath_softc *sc, int is_ht)
-{
- sc->sc_flags |= SC_OP_CHAINMASK_UPDATE;
- if (is_ht) {
- sc->sc_tx_chainmask = sc->sc_ah->ah_caps.tx_chainmask;
- sc->sc_rx_chainmask = sc->sc_ah->ah_caps.rx_chainmask;
- } else {
- sc->sc_tx_chainmask = 1;
- sc->sc_rx_chainmask = 1;
- }
-
- DPRINTF(sc, ATH_DBG_CONFIG, "%s: tx chmask: %d, rx chmask: %d\n",
- __func__, sc->sc_tx_chainmask, sc->sc_rx_chainmask);
-}
-
-/*******/
-/* ANI */
-/*******/
-
-/*
- * 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.
- */
-
-static void ath_ani_calibrate(unsigned long data)
-{
- struct ath_softc *sc;
- struct ath_hal *ah;
- bool longcal = false;
- bool shortcal = false;
- bool aniflag = false;
- unsigned int timestamp = jiffies_to_msecs(jiffies);
- u32 cal_interval;
-
- sc = (struct ath_softc *)data;
- ah = sc->sc_ah;
-
- /*
- * don't calibrate when we're scanning.
- * we are most likely not on our home channel.
- */
- if (sc->rx_filter & FIF_BCN_PRBRESP_PROMISC)
- return;
-
- /* Long calibration runs independently of short calibration. */
- if ((timestamp - sc->sc_ani.sc_longcal_timer) >= ATH_LONG_CALINTERVAL) {
- longcal = true;
- DPRINTF(sc, ATH_DBG_ANI, "%s: longcal @%lu\n",
- __func__, jiffies);
- sc->sc_ani.sc_longcal_timer = timestamp;
- }
-
- /* Short calibration applies only while sc_caldone is false */
- if (!sc->sc_ani.sc_caldone) {
- if ((timestamp - sc->sc_ani.sc_shortcal_timer) >=
- ATH_SHORT_CALINTERVAL) {
- shortcal = true;
- DPRINTF(sc, ATH_DBG_ANI, "%s: shortcal @%lu\n",
- __func__, jiffies);
- sc->sc_ani.sc_shortcal_timer = timestamp;
- sc->sc_ani.sc_resetcal_timer = timestamp;
- }
- } else {
- if ((timestamp - sc->sc_ani.sc_resetcal_timer) >=
- ATH_RESTART_CALINTERVAL) {
- ath9k_hw_reset_calvalid(ah, ah->ah_curchan,
- &sc->sc_ani.sc_caldone);
- if (sc->sc_ani.sc_caldone)
- sc->sc_ani.sc_resetcal_timer = timestamp;
- }
- }
-
- /* Verify whether we must check ANI */
- if ((timestamp - sc->sc_ani.sc_checkani_timer) >=
- ATH_ANI_POLLINTERVAL) {
- aniflag = true;
- sc->sc_ani.sc_checkani_timer = timestamp;
- }
-
- /* Skip all processing if there's nothing to do. */
- if (longcal || shortcal || aniflag) {
- /* Call ANI routine if necessary */
- if (aniflag)
- ath9k_hw_ani_monitor(ah, &sc->sc_halstats,
- ah->ah_curchan);
-
- /* Perform calibration if necessary */
- if (longcal || shortcal) {
- bool iscaldone = false;
-
- if (ath9k_hw_calibrate(ah, ah->ah_curchan,
- sc->sc_rx_chainmask, longcal,
- &iscaldone)) {
- if (longcal)
- sc->sc_ani.sc_noise_floor =
- ath9k_hw_getchan_noise(ah,
- ah->ah_curchan);
-
- DPRINTF(sc, ATH_DBG_ANI,
- "%s: calibrate chan %u/%x nf: %d\n",
- __func__,
- ah->ah_curchan->channel,
- ah->ah_curchan->channelFlags,
- sc->sc_ani.sc_noise_floor);
- } else {
- DPRINTF(sc, ATH_DBG_ANY,
- "%s: calibrate chan %u/%x failed\n",
- __func__,
- ah->ah_curchan->channel,
- ah->ah_curchan->channelFlags);
- }
- sc->sc_ani.sc_caldone = iscaldone;
- }
- }
-
- /*
- * 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_ANI_POLLINTERVAL;
- if (!sc->sc_ani.sc_caldone)
- cal_interval = min(cal_interval, (u32)ATH_SHORT_CALINTERVAL);
-
- mod_timer(&sc->sc_ani.timer, jiffies + msecs_to_jiffies(cal_interval));
-}
-
-/********/
-/* Core */
-/********/
-
-int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan)
-{
- struct ath_hal *ah = sc->sc_ah;
- int status;
- int error = 0;
-
- DPRINTF(sc, ATH_DBG_CONFIG, "%s: mode %d\n",
- __func__, sc->sc_ah->ah_opmode);
-
- /* Reset SERDES registers */
- ath9k_hw_configpcipowersave(ah, 0);
-
- /*
- * The basic interface to setting the hardware in a good
- * state is ``reset''. On return the hardware is known to
- * be powered up and with interrupts disabled. This must
- * be followed by initialization of the appropriate bits
- * and then setup of the interrupt mask.
- */
-
- spin_lock_bh(&sc->sc_resetlock);
- if (!ath9k_hw_reset(ah, initial_chan,
- sc->sc_ht_info.tx_chan_width,
- sc->sc_tx_chainmask, sc->sc_rx_chainmask,
- sc->sc_ht_extprotspacing, false, &status)) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to reset hardware; hal status %u "
- "(freq %u flags 0x%x)\n", __func__, status,
- initial_chan->channel, initial_chan->channelFlags);
- error = -EIO;
- spin_unlock_bh(&sc->sc_resetlock);
- goto done;
- }
- spin_unlock_bh(&sc->sc_resetlock);
-
- /*
- * This is needed only to setup initial state
- * but it's best done after a reset.
- */
- ath_update_txpow(sc);
-
- /*
- * Setup the hardware after reset:
- * The receive engine is set going.
- * Frame transmit is handled entirely
- * in the frame output path; there's nothing to do
- * here except setup the interrupt mask.
- */
- if (ath_startrecv(sc) != 0) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to start recv logic\n", __func__);
- error = -EIO;
- goto done;
- }
-
- /* Setup our intr mask. */
- sc->sc_imask = ATH9K_INT_RX | ATH9K_INT_TX
- | ATH9K_INT_RXEOL | ATH9K_INT_RXORN
- | ATH9K_INT_FATAL | ATH9K_INT_GLOBAL;
-
- if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_GTT)
- sc->sc_imask |= ATH9K_INT_GTT;
-
- if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
- sc->sc_imask |= ATH9K_INT_CST;
-
- /*
- * Enable MIB interrupts when there are hardware phy counters.
- * Note we only do this (at the moment) for station mode.
- */
- if (ath9k_hw_phycounters(ah) &&
- ((sc->sc_ah->ah_opmode == ATH9K_M_STA) ||
- (sc->sc_ah->ah_opmode == ATH9K_M_IBSS)))
- sc->sc_imask |= ATH9K_INT_MIB;
- /*
- * Some hardware processes the TIM IE and fires an
- * interrupt when the TIM bit is set. For hardware
- * that does, if not overridden by configuration,
- * enable the TIM interrupt when operating as station.
- */
- if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_ENHANCEDPM) &&
- (sc->sc_ah->ah_opmode == ATH9K_M_STA) &&
- !sc->sc_config.swBeaconProcess)
- sc->sc_imask |= ATH9K_INT_TIM;
-
- ath_setcurmode(sc, ath_chan2mode(initial_chan));
-
- sc->sc_flags &= ~SC_OP_INVALID;
-
- /* Disable BMISS interrupt when we're not associated */
- sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
- ath9k_hw_set_interrupts(sc->sc_ah,sc->sc_imask);
-
- ieee80211_wake_queues(sc->hw);
-done:
- return error;
-}
-
-void ath_stop(struct ath_softc *sc)
-{
- struct ath_hal *ah = sc->sc_ah;
-
- DPRINTF(sc, ATH_DBG_CONFIG, "%s: Cleaning up\n", __func__);
-
- ieee80211_stop_queues(sc->hw);
-
- /* make sure h/w will not generate any interrupt
- * before setting the invalid flag. */
- ath9k_hw_set_interrupts(ah, 0);
-
- if (!(sc->sc_flags & SC_OP_INVALID)) {
- ath_draintxq(sc, false);
- ath_stoprecv(sc);
- ath9k_hw_phy_disable(ah);
- } else
- sc->sc_rxlink = NULL;
-
-#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
- if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
- cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
-#endif
- /* disable HAL and put h/w to sleep */
- ath9k_hw_disable(sc->sc_ah);
- ath9k_hw_configpcipowersave(sc->sc_ah, 1);
-
- sc->sc_flags |= SC_OP_INVALID;
-}
-
-int ath_reset(struct ath_softc *sc, bool retry_tx)
-{
- struct ath_hal *ah = sc->sc_ah;
- int status;
- int error = 0;
-
- ath9k_hw_set_interrupts(ah, 0);
- ath_draintxq(sc, retry_tx);
- ath_stoprecv(sc);
- ath_flushrecv(sc);
-
- /* Reset chip */
- spin_lock_bh(&sc->sc_resetlock);
- if (!ath9k_hw_reset(ah, sc->sc_ah->ah_curchan,
- sc->sc_ht_info.tx_chan_width,
- sc->sc_tx_chainmask, sc->sc_rx_chainmask,
- sc->sc_ht_extprotspacing, false, &status)) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to reset hardware; hal status %u\n",
- __func__, status);
- error = -EIO;
- }
- spin_unlock_bh(&sc->sc_resetlock);
-
- if (ath_startrecv(sc) != 0)
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to start recv logic\n", __func__);
-
- /*
- * We may be doing a reset in response to a request
- * that changes the channel so update any state that
- * might change as a result.
- */
- ath_setcurmode(sc, ath_chan2mode(sc->sc_ah->ah_curchan));
-
- ath_update_txpow(sc);
-
- if (sc->sc_flags & SC_OP_BEACONS)
- ath_beacon_config(sc, ATH_IF_ID_ANY); /* restart beacons */
-
- ath9k_hw_set_interrupts(ah, sc->sc_imask);
-
- /* Restart the txq */
- if (retry_tx) {
- int i;
- for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
- if (ATH_TXQ_SETUP(sc, i)) {
- spin_lock_bh(&sc->sc_txq[i].axq_lock);
- ath_txq_schedule(sc, &sc->sc_txq[i]);
- spin_unlock_bh(&sc->sc_txq[i].axq_lock);
- }
- }
- }
-
- return error;
-}
-
-/* Interrupt handler. Most of the actual processing is deferred.
- * It's the caller's responsibility to ensure the chip is awake. */
-
-irqreturn_t ath_isr(int irq, void *dev)
-{
- struct ath_softc *sc = dev;
- struct ath_hal *ah = sc->sc_ah;
- enum ath9k_int status;
- bool sched = false;
-
- do {
- if (sc->sc_flags & SC_OP_INVALID) {
- /*
- * The hardware is not ready/present, don't
- * touch anything. Note this can happen early
- * on if the IRQ is shared.
- */
- return IRQ_NONE;
- }
- if (!ath9k_hw_intrpend(ah)) { /* shared irq, not for us */
- return IRQ_NONE;
- }
-
- /*
- * Figure out the reason(s) for the interrupt. Note
- * that the hal returns a pseudo-ISR that may include
- * bits we haven't explicitly enabled so we mask the
- * value to insure we only process bits we requested.
- */
- ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
-
- status &= sc->sc_imask; /* discard unasked-for bits */
-
- /*
- * If there are no status bits set, then this interrupt was not
- * for me (should have been caught above).
- */
-
- if (!status)
- return IRQ_NONE;
-
- sc->sc_intrstatus = status;
-
- if (status & ATH9K_INT_FATAL) {
- /* need a chip reset */
- sched = true;
- } else if (status & ATH9K_INT_RXORN) {
- /* need a chip reset */
- sched = true;
- } else {
- if (status & ATH9K_INT_SWBA) {
- /* schedule a tasklet for beacon handling */
- tasklet_schedule(&sc->bcon_tasklet);
- }
- if (status & ATH9K_INT_RXEOL) {
- /*
- * NB: the hardware should re-read the link when
- * RXE bit is written, but it doesn't work
- * at least on older hardware revs.
- */
- sched = true;
- }
-
- if (status & ATH9K_INT_TXURN)
- /* bump tx trigger level */
- ath9k_hw_updatetxtriglevel(ah, true);
- /* XXX: optimize this */
- if (status & ATH9K_INT_RX)
- sched = true;
- if (status & ATH9K_INT_TX)
- sched = true;
- if (status & ATH9K_INT_BMISS)
- sched = true;
- /* carrier sense timeout */
- if (status & ATH9K_INT_CST)
- sched = true;
- if (status & ATH9K_INT_MIB) {
- /*
- * Disable interrupts until we service the MIB
- * interrupt; otherwise it will continue to
- * fire.
- */
- ath9k_hw_set_interrupts(ah, 0);
- /*
- * Let the hal handle the event. We assume
- * it will clear whatever condition caused
- * the interrupt.
- */
- ath9k_hw_procmibevent(ah, &sc->sc_halstats);
- ath9k_hw_set_interrupts(ah, sc->sc_imask);
- }
- if (status & ATH9K_INT_TIM_TIMER) {
- if (!(ah->ah_caps.hw_caps &
- ATH9K_HW_CAP_AUTOSLEEP)) {
- /* Clear RxAbort bit so that we can
- * receive frames */
- ath9k_hw_setrxabort(ah, 0);
- sched = true;
- }
- }
- }
- } while (0);
-
- if (sched) {
- /* turn off every interrupt except SWBA */
- ath9k_hw_set_interrupts(ah, (sc->sc_imask & ATH9K_INT_SWBA));
- tasklet_schedule(&sc->intr_tq);
- }
-
- return IRQ_HANDLED;
-}
-
-/* Deferred interrupt processing */
-
-static void ath9k_tasklet(unsigned long data)
-{
- struct ath_softc *sc = (struct ath_softc *)data;
- u32 status = sc->sc_intrstatus;
-
- if (status & ATH9K_INT_FATAL) {
- /* need a chip reset */
- ath_reset(sc, false);
- return;
- } else {
-
- if (status &
- (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN)) {
- /* XXX: fill me in */
- /*
- if (status & ATH9K_INT_RXORN) {
- }
- if (status & ATH9K_INT_RXEOL) {
- }
- */
- spin_lock_bh(&sc->sc_rxflushlock);
- ath_rx_tasklet(sc, 0);
- spin_unlock_bh(&sc->sc_rxflushlock);
- }
- /* XXX: optimize this */
- if (status & ATH9K_INT_TX)
- ath_tx_tasklet(sc);
- /* XXX: fill me in */
- /*
- if (status & ATH9K_INT_BMISS) {
- }
- if (status & (ATH9K_INT_TIM | ATH9K_INT_DTIMSYNC)) {
- if (status & ATH9K_INT_TIM) {
- }
- if (status & ATH9K_INT_DTIMSYNC) {
- }
- }
- */
- }
-
- /* re-enable hardware interrupt */
- ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask);
-}
-
-int ath_init(u16 devid, struct ath_softc *sc)
-{
- struct ath_hal *ah = NULL;
- int status;
- int error = 0, i;
- int csz = 0;
-
- /* XXX: hardware will not be ready until ath_open() being called */
- sc->sc_flags |= SC_OP_INVALID;
- sc->sc_debug = DBG_DEFAULT;
-
- spin_lock_init(&sc->sc_resetlock);
- tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
- tasklet_init(&sc->bcon_tasklet, ath9k_beacon_tasklet,
- (unsigned long)sc);
-
- /*
- * Cache line size is used to size and align various
- * structures used to communicate with the hardware.
- */
- bus_read_cachesize(sc, &csz);
- /* XXX assert csz is non-zero */
- sc->sc_cachelsz = csz << 2; /* convert to bytes */
-
- ah = ath9k_hw_attach(devid, sc, sc->mem, &status);
- if (ah == NULL) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to attach hardware; HAL status %u\n",
- __func__, status);
- error = -ENXIO;
- goto bad;
- }
- sc->sc_ah = ah;
-
- /* Get the hardware key cache size. */
- sc->sc_keymax = ah->ah_caps.keycache_size;
- if (sc->sc_keymax > ATH_KEYMAX) {
- DPRINTF(sc, ATH_DBG_KEYCACHE,
- "%s: Warning, using only %u entries in %u key cache\n",
- __func__, ATH_KEYMAX, sc->sc_keymax);
- sc->sc_keymax = ATH_KEYMAX;
- }
-
- /*
- * Reset the key cache since some parts do not
- * reset the contents on initial power up.
- */
- for (i = 0; i < sc->sc_keymax; i++)
- ath9k_hw_keyreset(ah, (u16) i);
- /*
- * Mark key cache slots associated with global keys
- * as in use. If we knew TKIP was not to be used we
- * could leave the +32, +64, and +32+64 slots free.
- * XXX only for splitmic.
- */
- for (i = 0; i < IEEE80211_WEP_NKID; i++) {
- set_bit(i, sc->sc_keymap);
- set_bit(i + 32, sc->sc_keymap);
- set_bit(i + 64, sc->sc_keymap);
- set_bit(i + 32 + 64, sc->sc_keymap);
- }
-
- /* Collect the channel list using the default country code */
-
- error = ath_setup_channels(sc);
- if (error)
- goto bad;
-
- /* default to MONITOR mode */
- sc->sc_ah->ah_opmode = ATH9K_M_MONITOR;
-
- /* Setup rate tables */
-
- ath_rate_attach(sc);
- ath_setup_rates(sc, IEEE80211_BAND_2GHZ);
- ath_setup_rates(sc, IEEE80211_BAND_5GHZ);
-
- /*
- * Allocate hardware transmit queues: one queue for
- * beacon frames and one data queue for each QoS
- * priority. Note that the hal handles reseting
- * these queues at the needed time.
- */
- sc->sc_bhalq = ath_beaconq_setup(ah);
- if (sc->sc_bhalq == -1) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to setup a beacon xmit queue\n", __func__);
- error = -EIO;
- goto bad2;
- }
- sc->sc_cabq = ath_txq_setup(sc, ATH9K_TX_QUEUE_CAB, 0);
- if (sc->sc_cabq == NULL) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to setup CAB xmit queue\n", __func__);
- error = -EIO;
- goto bad2;
- }
-
- sc->sc_config.cabqReadytime = ATH_CABQ_READY_TIME;
- ath_cabq_update(sc);
-
- for (i = 0; i < ARRAY_SIZE(sc->sc_haltype2q); i++)
- sc->sc_haltype2q[i] = -1;
-
- /* Setup data queues */
- /* NB: ensure BK queue is the lowest priority h/w queue */
- if (!ath_tx_setup(sc, ATH9K_WME_AC_BK)) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to setup xmit queue for BK traffic\n",
- __func__);
- error = -EIO;
- goto bad2;
- }
-
- if (!ath_tx_setup(sc, ATH9K_WME_AC_BE)) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to setup xmit queue for BE traffic\n",
- __func__);
- error = -EIO;
- goto bad2;
- }
- if (!ath_tx_setup(sc, ATH9K_WME_AC_VI)) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to setup xmit queue for VI traffic\n",
- __func__);
- error = -EIO;
- goto bad2;
- }
- if (!ath_tx_setup(sc, ATH9K_WME_AC_VO)) {
- DPRINTF(sc, ATH_DBG_FATAL,
- "%s: unable to setup xmit queue for VO traffic\n",
- __func__);
- error = -EIO;
- goto bad2;
- }
-
- /* Initializes the noise floor to a reasonable default value.
- * Later on this will be updated during ANI processing. */
-
- sc->sc_ani.sc_noise_floor = ATH_DEFAULT_NOISE_FLOOR;
- setup_timer(&sc->sc_ani.timer, ath_ani_calibrate, (unsigned long)sc);
-
- if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
- ATH9K_CIPHER_TKIP, NULL)) {
- /*
- * Whether we should enable h/w TKIP MIC.
- * XXX: if we don't support WME TKIP MIC, then we wouldn't
- * report WMM capable, so it's always safe to turn on
- * TKIP MIC in this case.
- */
- ath9k_hw_setcapability(sc->sc_ah, ATH9K_CAP_TKIP_MIC,
- 0, 1, NULL);
- }
-
- /*
- * Check whether the separate key cache entries
- * are required to handle both tx+rx MIC keys.
- * With split mic keys the number of stations is limited
- * to 27 otherwise 59.
- */
- if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
- ATH9K_CIPHER_TKIP, NULL)
- && ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
- ATH9K_CIPHER_MIC, NULL)
- && ath9k_hw_getcapability(ah, ATH9K_CAP_TKIP_SPLIT,
- 0, NULL))
- sc->sc_splitmic = 1;
-
- /* turn on mcast key search if possible */
- if (!ath9k_hw_getcapability(ah, ATH9K_CAP_MCAST_KEYSRCH, 0, NULL))
- (void)ath9k_hw_setcapability(ah, ATH9K_CAP_MCAST_KEYSRCH, 1,
- 1, NULL);
-
- sc->sc_config.txpowlimit = ATH_TXPOWER_MAX;
- sc->sc_config.txpowlimit_override = 0;
-
- /* 11n Capabilities */
- if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) {
- sc->sc_flags |= SC_OP_TXAGGR;
- sc->sc_flags |= SC_OP_RXAGGR;
- }
-
- sc->sc_tx_chainmask = ah->ah_caps.tx_chainmask;
- sc->sc_rx_chainmask = ah->ah_caps.rx_chainmask;
-
- ath9k_hw_setcapability(ah, ATH9K_CAP_DIVERSITY, 1, true, NULL);
- sc->sc_defant = ath9k_hw_getdefantenna(ah);
-
- ath9k_hw_getmac(ah, sc->sc_myaddr);
- if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) {
- ath9k_hw_getbssidmask(ah, sc->sc_bssidmask);
- ATH_SET_VAP_BSSID_MASK(sc->sc_bssidmask);
- ath9k_hw_setbssidmask(ah, sc->sc_bssidmask);
- }
-
- sc->sc_slottime = ATH9K_SLOT_TIME_9; /* default to short slot time */
-
- /* initialize beacon slots */
- for (i = 0; i < ARRAY_SIZE(sc->sc_bslot); i++)
- sc->sc_bslot[i] = ATH_IF_ID_ANY;
-
- /* save MISC configurations */
- sc->sc_config.swBeaconProcess = 1;
-
-#ifdef CONFIG_SLOW_ANT_DIV
- /* range is 40 - 255, we use something in the middle */
- ath_slow_ant_div_init(&sc->sc_antdiv, sc, 0x127);
-#endif
-
- /* setup channels and rates */
-
- sc->sbands[IEEE80211_BAND_2GHZ].channels =
- sc->channels[IEEE80211_BAND_2GHZ];
- sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
- sc->rates[IEEE80211_BAND_2GHZ];
- sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
-
- if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {
- sc->sbands[IEEE80211_BAND_5GHZ].channels =
- sc->channels[IEEE80211_BAND_5GHZ];
- sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
- sc->rates[IEEE80211_BAND_5GHZ];
- sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;
- }
-
- return 0;
-bad2:
- /* cleanup tx queues */
- for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
- if (ATH_TXQ_SETUP(sc, i))
- ath_tx_cleanupq(sc, &sc->sc_txq[i]);
-bad:
- if (ah)
- ath9k_hw_detach(ah);
-
- return error;
-}
-
-/*******************/
-/* Node Management */
-/*******************/
-
-void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
-{
- struct ath_node *an;
-
- an = (struct ath_node *)sta->drv_priv;
-
- if (sc->sc_flags & SC_OP_TXAGGR)
- ath_tx_node_init(sc, an);
-
- an->maxampdu = 1 << (IEEE80211_HTCAP_MAXRXAMPDU_FACTOR +
- sta->ht_cap.ampdu_factor);
- an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
-
- ath_chainmask_sel_init(sc, an);
- ath_chainmask_sel_timerstart(&an->an_chainmask_sel);
-}
-
-void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
-{
- struct ath_node *an = (struct ath_node *)sta->drv_priv;
-
- ath_chainmask_sel_timerstop(&an->an_chainmask_sel);
-
- if (sc->sc_flags & SC_OP_TXAGGR)
- ath_tx_node_cleanup(sc, an);
-}
-
-/*
- * Set up New Node
- *
- * Setup driver-specific state for a newly associated node. This routine
- * really only applies if compression or XR are enabled, there is no code
- * covering any other cases.
-*/
-
-void ath_newassoc(struct ath_softc *sc,
- struct ath_node *an, int isnew, int isuapsd)
-{
- int tidno;
-
- /* if station reassociates, tear down the aggregation state. */
- if (!isnew) {
- for (tidno = 0; tidno < WME_NUM_TID; tidno++) {
- if (sc->sc_flags & SC_OP_TXAGGR)
- ath_tx_aggr_teardown(sc, an, tidno);
- }
- }
-}
-
-/**************/
-/* Encryption */
-/**************/
-
-void ath_key_reset(struct ath_softc *sc, u16 keyix, int freeslot)
-{
- ath9k_hw_keyreset(sc->sc_ah, keyix);
- if (freeslot)
- clear_bit(keyix, sc->sc_keymap);
-}
-
-int ath_keyset(struct ath_softc *sc,
- u16 keyix,
- struct ath9k_keyval *hk,
- const u8 mac[ETH_ALEN])
-{
- bool status;
-
- status = ath9k_hw_set_keycache_entry(sc->sc_ah,
- keyix, hk, mac, false);
-
- return status != false;
-}
-
-/***********************/
-/* TX Power/Regulatory */
-/***********************/
-
-/*
- * Set Transmit power in HAL
- *
- * This routine makes the actual HAL calls to set the new transmit power
- * limit.
-*/
-
-void ath_update_txpow(struct ath_softc *sc)
-{
- struct ath_hal *ah = sc->sc_ah;
- u32 txpow;
-
- if (sc->sc_curtxpow != sc->sc_config.txpowlimit) {
- ath9k_hw_set_txpowerlimit(ah, sc->sc_config.txpowlimit);
- /* read back in case value is clamped */
- ath9k_hw_getcapability(ah, ATH9K_CAP_TXPOW, 1, &txpow);
- sc->sc_curtxpow = txpow;
- }
-}
-
-/**************************/
-/* Slow Antenna Diversity */
-/**************************/
-
-void ath_slow_ant_div_init(struct ath_antdiv *antdiv,
- struct ath_softc *sc,
- int32_t rssitrig)
-{
- int trig;
-
- /* antdivf_rssitrig can range from 40 - 0xff */
- trig = (rssitrig > 0xff) ? 0xff : rssitrig;
- trig = (rssitrig < 40) ? 40 : rssitrig;
-
- antdiv->antdiv_sc = sc;
- antdiv->antdivf_rssitrig = trig;
-}
-
-void ath_slow_ant_div_start(struct ath_antdiv *antdiv,
- u8 num_antcfg,
- const u8 *bssid)
-{
- antdiv->antdiv_num_antcfg =
- num_antcfg < ATH_ANT_DIV_MAX_CFG ?
- num_antcfg : ATH_ANT_DIV_MAX_CFG;
- antdiv->antdiv_state = ATH_ANT_DIV_IDLE;
- antdiv->antdiv_curcfg = 0;
- antdiv->antdiv_bestcfg = 0;
- antdiv->antdiv_laststatetsf = 0;
-
- memcpy(antdiv->antdiv_bssid, bssid, sizeof(antdiv->antdiv_bssid));
-
- antdiv->antdiv_start = 1;
-}
-
-void ath_slow_ant_div_stop(struct ath_antdiv *antdiv)
-{
- antdiv->antdiv_start = 0;
-}
-
-static int32_t ath_find_max_val(int32_t *val,
- u8 num_val, u8 *max_index)
-{
- u32 MaxVal = *val++;
- u32 cur_index = 0;
-
- *max_index = 0;
- while (++cur_index < num_val) {
- if (*val > MaxVal) {
- MaxVal = *val;
- *max_index = cur_index;
- }
-
- val++;
- }
-
- return MaxVal;
-}
-
-void ath_slow_ant_div(struct ath_antdiv *antdiv,
- struct ieee80211_hdr *hdr,
- struct ath_rx_status *rx_stats)
-{
- struct ath_softc *sc = antdiv->antdiv_sc;
- struct ath_hal *ah = sc->sc_ah;
- u64 curtsf = 0;
- u8 bestcfg, curcfg = antdiv->antdiv_curcfg;
- __le16 fc = hdr->frame_control;
-
- if (antdiv->antdiv_start && ieee80211_is_beacon(fc)
- && !compare_ether_addr(hdr->addr3, antdiv->antdiv_bssid)) {
- antdiv->antdiv_lastbrssi[curcfg] = rx_stats->rs_rssi;
- antdiv->antdiv_lastbtsf[curcfg] = ath9k_hw_gettsf64(sc->sc_ah);
- curtsf = antdiv->antdiv_lastbtsf[curcfg];
- } else {
- return;
- }
-
- switch (antdiv->antdiv_state) {
- case ATH_ANT_DIV_IDLE:
- if ((antdiv->antdiv_lastbrssi[curcfg] <
- antdiv->antdivf_rssitrig)
- && ((curtsf - antdiv->antdiv_laststatetsf) >
- ATH_ANT_DIV_MIN_IDLE_US)) {
-
- curcfg++;
- if (curcfg == antdiv->antdiv_num_antcfg)
- curcfg = 0;
-
- if (!ath9k_hw_select_antconfig(ah, curcfg)) {
- antdiv->antdiv_bestcfg = antdiv->antdiv_curcfg;
- antdiv->antdiv_curcfg = curcfg;
- antdiv->antdiv_laststatetsf = curtsf;
- antdiv->antdiv_state = ATH_ANT_DIV_SCAN;
- }
- }
- break;
-
- case ATH_ANT_DIV_SCAN:
- if ((curtsf - antdiv->antdiv_laststatetsf) <
- ATH_ANT_DIV_MIN_SCAN_US)
- break;
-
- curcfg++;
- if (curcfg == antdiv->antdiv_num_antcfg)
- curcfg = 0;
-
- if (curcfg == antdiv->antdiv_bestcfg) {
- ath_find_max_val(antdiv->antdiv_lastbrssi,
- antdiv->antdiv_num_antcfg, &bestcfg);
- if (!ath9k_hw_select_antconfig(ah, bestcfg)) {
- antdiv->antdiv_bestcfg = bestcfg;
- antdiv->antdiv_curcfg = bestcfg;
- antdiv->antdiv_laststatetsf = curtsf;
- antdiv->antdiv_state = ATH_ANT_DIV_IDLE;
- }
- } else {
- if (!ath9k_hw_select_antconfig(ah, curcfg)) {
- antdiv->antdiv_curcfg = curcfg;
- antdiv->antdiv_laststatetsf = curtsf;
- antdiv->antdiv_state = ATH_ANT_DIV_SCAN;
- }
- }
-
- break;
- }
-}
-
-/***********************/
-/* Descriptor Handling */
-/***********************/
-
-/*
- * Set up DMA descriptors
- *
- * This function will allocate both the DMA descriptor structure, and the
- * buffers it contains. These are used to contain the descriptors used
- * by the system.
-*/
-
-int ath_descdma_setup(struct ath_softc *sc,
- struct ath_descdma *dd,
- struct list_head *head,
- const char *name,
- int nbuf,
- int ndesc)
-{
-#define DS2PHYS(_dd, _ds) \
- ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
-#define ATH_DESC_4KB_BOUND_CHECK(_daddr) ((((_daddr) & 0xFFF) > 0xF7F) ? 1 : 0)
-#define ATH_DESC_4KB_BOUND_NUM_SKIPPED(_len) ((_len) / 4096)
-
- struct ath_desc *ds;
- struct ath_buf *bf;
- int i, bsize, error;
-
- DPRINTF(sc, ATH_DBG_CONFIG, "%s: %s DMA: %u buffers %u desc/buf\n",
- __func__, name, nbuf, ndesc);
-
- /* ath_desc must be a multiple of DWORDs */
- if ((sizeof(struct ath_desc) % 4) != 0) {
- DPRINTF(sc, ATH_DBG_FATAL, "%s: ath_desc not DWORD aligned\n",
- __func__);
- ASSERT((sizeof(struct ath_desc) % 4) == 0);
- error = -ENOMEM;
- goto fail;
- }
-
- dd->dd_name = name;
- dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc;
-
- /*
- * Need additional DMA memory because we can't use
- * descriptors that cross the 4K page boundary. Assume
- * one skipped descriptor per 4K page.
- */
- if (!(sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_4KB_SPLITTRANS)) {
- u32 ndesc_skipped =
- ATH_DESC_4KB_BOUND_NUM_SKIPPED(dd->dd_desc_len);
- u32 dma_len;
-
- while (ndesc_skipped) {
- dma_len = ndesc_skipped * sizeof(struct ath_desc);
- dd->dd_desc_len += dma_len;
-
- ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
- };
- }
-
- /* allocate descriptors */
- dd->dd_desc = pci_alloc_consistent(sc->pdev,
- dd->dd_desc_len,
- &dd->dd_desc_paddr);
- if (dd->dd_desc == NULL) {
- error = -ENOMEM;
- goto fail;
- }
- ds = dd->dd_desc;
- DPRINTF(sc, ATH_DBG_CONFIG, "%s: %s DMA map: %p (%u) -> %llx (%u)\n",
- __func__, dd->dd_name, ds, (u32) dd->dd_desc_len,
- ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
-
- /* allocate buffers */
- bsize = sizeof(struct ath_buf) * nbuf;
- bf = kmalloc(bsize, GFP_KERNEL);
- if (bf == NULL) {
- error = -ENOMEM;
- goto fail2;
- }
- memset(bf, 0, bsize);
- dd->dd_bufptr = bf;
-
- INIT_LIST_HEAD(head);
- for (i = 0; i < nbuf; i++, bf++, ds += ndesc) {
- bf->bf_desc = ds;
- bf->bf_daddr = DS2PHYS(dd, ds);
-
- if (!(sc->sc_ah->ah_caps.hw_caps &
- ATH9K_HW_CAP_4KB_SPLITTRANS)) {
- /*
- * Skip descriptor addresses which can cause 4KB
- * boundary crossing (addr + length) with a 32 dword
- * descriptor fetch.
- */
- while (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr)) {
- ASSERT((caddr_t) bf->bf_desc <
- ((caddr_t) dd->dd_desc +
- dd->dd_desc_len));
-
- ds += ndesc;
- bf->bf_desc = ds;
- bf->bf_daddr = DS2PHYS(dd, ds);
- }
- }
- list_add_tail(&bf->list, head);
- }
- return 0;
-fail2:
- pci_free_consistent(sc->pdev,
- dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
-fail:
- memset(dd, 0, sizeof(*dd));
- return error;
-#undef ATH_DESC_4KB_BOUND_CHECK
-#undef ATH_DESC_4KB_BOUND_NUM_SKIPPED
-#undef DS2PHYS
-}
-
-/*
- * Cleanup DMA descriptors
- *
- * This function will free the DMA block that was allocated for the descriptor
- * pool. Since this was allocated as one "chunk", it is freed in the same
- * manner.
-*/
-
-void ath_descdma_cleanup(struct ath_softc *sc,
- struct ath_descdma *dd,
- struct list_head *head)
-{
- /* Free memory associated with descriptors */
- pci_free_consistent(sc->pdev,
- dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
-
- INIT_LIST_HEAD(head);
- kfree(dd->dd_bufptr);
- memset(dd, 0, sizeof(*dd));
-}
-
-/*************/
-/* Utilities */
-/*************/
-
-int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
-{
- int qnum;
-
- switch (queue) {
- case 0:
- qnum = sc->sc_haltype2q[ATH9K_WME_AC_VO];
- break;
- case 1:
- qnum = sc->sc_haltype2q[ATH9K_WME_AC_VI];
- break;
- case 2:
- qnum = sc->sc_haltype2q[ATH9K_WME_AC_BE];
- break;
- case 3:
- qnum = sc->sc_haltype2q[ATH9K_WME_AC_BK];
- break;
- default:
- qnum = sc->sc_haltype2q[ATH9K_WME_AC_BE];
- break;
- }
-
- return qnum;
-}
-
-int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
-{
- int qnum;
-
- switch (queue) {
- case ATH9K_WME_AC_VO:
- qnum = 0;
- break;
- case ATH9K_WME_AC_VI:
- qnum = 1;
- break;
- case ATH9K_WME_AC_BE:
- qnum = 2;
- break;
- case ATH9K_WME_AC_BK:
- qnum = 3;
- break;
- default:
- qnum = -1;
- break;
- }
-
- return qnum;
-}
-
-
-/*
- * Expand time stamp to TSF
- *
- * Extend 15-bit time stamp from rx descriptor to
- * a full 64-bit TSF using the current h/w TSF.
-*/
-
-u64 ath_extend_tsf(struct ath_softc *sc, u32 rstamp)
-{
- u64 tsf;
-
- tsf = ath9k_hw_gettsf64(sc->sc_ah);
- if ((tsf & 0x7fff) < rstamp)
- tsf -= 0x8000;
- return (tsf & ~0x7fff) | rstamp;
-}
-
-/*
- * Set Default Antenna
- *
- * Call into the HAL to set the default antenna to use. Not really valid for
- * MIMO technology.
-*/
-
-void ath_setdefantenna(void *context, u32 antenna)
-{
- struct ath_softc *sc = (struct ath_softc *)context;
- struct ath_hal *ah = sc->sc_ah;
-
- /* XXX block beacon interrupts */
- ath9k_hw_setantenna(ah, antenna);
- sc->sc_defant = antenna;
- sc->sc_rxotherant = 0;
-}
-
-/*
- * Set Slot Time
- *
- * This will wake up the chip if required, and set the slot time for the
- * frame (maximum transmit time). Slot time is assumed to be already set
- * in the ATH object member sc_slottime
-*/
-
-void ath_setslottime(struct ath_softc *sc)
-{
- ath9k_hw_setslottime(sc->sc_ah, sc->sc_slottime);
- sc->sc_updateslot = OK;
-}
git.openpandora.org / pandora-kernel.git / blobdiff