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gerrit-public.fairphone.software / kernel / msm / 05c78d6d3ec5a8325398b3866e7e6bb88940d4fd / . / drivers / net / wireless / ath / ath9k / main.c
blob: adb0edf2c8b02cb563bfc72fcfddb4922dceb125 [file] [log] [blame]
/*
* Copyright (c) 2008-2009 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 <linux/nl80211.h>
#include "ath9k.h"
#include "btcoex.h"
static char *dev_info = "ath9k";
MODULE_AUTHOR("Atheros Communications");
MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
MODULE_LICENSE("Dual BSD/GPL");
static int modparam_nohwcrypt;
module_param_named(nohwcrypt, modparam_nohwcrypt, int, 0444);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption");
static unsigned int ath9k_debug = ATH_DBG_DEFAULT;
module_param_named(debug, ath9k_debug, uint, 0);
MODULE_PARM_DESC(debug, "Debugging mask");
/* We use the hw_value as an index into our private channel structure */
#define CHAN2G(_freq, _idx) { \
.center_freq = (_freq), \
.hw_value = (_idx), \
.max_power = 20, \
}
#define CHAN5G(_freq, _idx) { \
.band = IEEE80211_BAND_5GHZ, \
.center_freq = (_freq), \
.hw_value = (_idx), \
.max_power = 20, \
}
/* Some 2 GHz radios are actually tunable on 2312-2732
* on 5 MHz steps, we support the channels which we know
* we have calibration data for all cards though to make
* this static */
static struct ieee80211_channel ath9k_2ghz_chantable[] = {
CHAN2G(2412, 0), /* Channel 1 */
CHAN2G(2417, 1), /* Channel 2 */
CHAN2G(2422, 2), /* Channel 3 */
CHAN2G(2427, 3), /* Channel 4 */
CHAN2G(2432, 4), /* Channel 5 */
CHAN2G(2437, 5), /* Channel 6 */
CHAN2G(2442, 6), /* Channel 7 */
CHAN2G(2447, 7), /* Channel 8 */
CHAN2G(2452, 8), /* Channel 9 */
CHAN2G(2457, 9), /* Channel 10 */
CHAN2G(2462, 10), /* Channel 11 */
CHAN2G(2467, 11), /* Channel 12 */
CHAN2G(2472, 12), /* Channel 13 */
CHAN2G(2484, 13), /* Channel 14 */
};
/* Some 5 GHz radios are actually tunable on XXXX-YYYY
* on 5 MHz steps, we support the channels which we know
* we have calibration data for all cards though to make
* this static */
static struct ieee80211_channel ath9k_5ghz_chantable[] = {
/* _We_ call this UNII 1 */
CHAN5G(5180, 14), /* Channel 36 */
CHAN5G(5200, 15), /* Channel 40 */
CHAN5G(5220, 16), /* Channel 44 */
CHAN5G(5240, 17), /* Channel 48 */
/* _We_ call this UNII 2 */
CHAN5G(5260, 18), /* Channel 52 */
CHAN5G(5280, 19), /* Channel 56 */
CHAN5G(5300, 20), /* Channel 60 */
CHAN5G(5320, 21), /* Channel 64 */
/* _We_ call this "Middle band" */
CHAN5G(5500, 22), /* Channel 100 */
CHAN5G(5520, 23), /* Channel 104 */
CHAN5G(5540, 24), /* Channel 108 */
CHAN5G(5560, 25), /* Channel 112 */
CHAN5G(5580, 26), /* Channel 116 */
CHAN5G(5600, 27), /* Channel 120 */
CHAN5G(5620, 28), /* Channel 124 */
CHAN5G(5640, 29), /* Channel 128 */
CHAN5G(5660, 30), /* Channel 132 */
CHAN5G(5680, 31), /* Channel 136 */
CHAN5G(5700, 32), /* Channel 140 */
/* _We_ call this UNII 3 */
CHAN5G(5745, 33), /* Channel 149 */
CHAN5G(5765, 34), /* Channel 153 */
CHAN5G(5785, 35), /* Channel 157 */
CHAN5G(5805, 36), /* Channel 161 */
CHAN5G(5825, 37), /* Channel 165 */
};
/* Atheros hardware rate code addition for short premble */
#define SHPCHECK(__hw_rate, __flags) \
((__flags & IEEE80211_RATE_SHORT_PREAMBLE) ? (__hw_rate | 0x04 ) : 0)
#define RATE(_bitrate, _hw_rate, _flags) { \
.bitrate = (_bitrate), \
.flags = (_flags), \
.hw_value = (_hw_rate), \
.hw_value_short = (SHPCHECK(_hw_rate, _flags)) \
}
static struct ieee80211_rate ath9k_legacy_rates[] = {
RATE(10, 0x1b, 0),
RATE(20, 0x1a, IEEE80211_RATE_SHORT_PREAMBLE),
RATE(55, 0x19, IEEE80211_RATE_SHORT_PREAMBLE),
RATE(110, 0x18, IEEE80211_RATE_SHORT_PREAMBLE),
RATE(60, 0x0b, 0),
RATE(90, 0x0f, 0),
RATE(120, 0x0a, 0),
RATE(180, 0x0e, 0),
RATE(240, 0x09, 0),
RATE(360, 0x0d, 0),
RATE(480, 0x08, 0),
RATE(540, 0x0c, 0),
};
static void ath_cache_conf_rate(struct ath_softc *sc,
struct ieee80211_conf *conf)
{
switch (conf->channel->band) {
case IEEE80211_BAND_2GHZ:
if (conf_is_ht20(conf))
sc->cur_rate_mode = ATH9K_MODE_11NG_HT20;
else if (conf_is_ht40_minus(conf))
sc->cur_rate_mode = ATH9K_MODE_11NG_HT40MINUS;
else if (conf_is_ht40_plus(conf))
sc->cur_rate_mode = ATH9K_MODE_11NG_HT40PLUS;
else
sc->cur_rate_mode = ATH9K_MODE_11G;
break;
case IEEE80211_BAND_5GHZ:
if (conf_is_ht20(conf))
sc->cur_rate_mode = ATH9K_MODE_11NA_HT20;
else if (conf_is_ht40_minus(conf))
sc->cur_rate_mode = ATH9K_MODE_11NA_HT40MINUS;
else if (conf_is_ht40_plus(conf))
sc->cur_rate_mode = ATH9K_MODE_11NA_HT40PLUS;
else
sc->cur_rate_mode = ATH9K_MODE_11A;
break;
default:
BUG_ON(1);
break;
}
}
static void ath_update_txpow(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
u32 txpow;
if (sc->curtxpow != sc->config.txpowlimit) {
ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit);
/* read back in case value is clamped */
ath9k_hw_getcapability(ah, ATH9K_CAP_TXPOW, 1, &txpow);
sc->curtxpow = txpow;
}
}
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;
}
}
static struct ath9k_channel *ath_get_curchannel(struct ath_softc *sc,
struct ieee80211_hw *hw)
{
struct ieee80211_channel *curchan = hw->conf.channel;
struct ath9k_channel *channel;
u8 chan_idx;
chan_idx = curchan->hw_value;
channel = &sc->sc_ah->channels[chan_idx];
ath9k_update_ichannel(sc, hw, channel);
return channel;
}
static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
{
unsigned long flags;
bool ret;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
ret = ath9k_hw_setpower(sc->sc_ah, mode);
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
return ret;
}
void ath9k_ps_wakeup(struct ath_softc *sc)
{
unsigned long flags;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (++sc->ps_usecount != 1)
goto unlock;
ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
unlock:
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
void ath9k_ps_restore(struct ath_softc *sc)
{
unsigned long flags;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (--sc->ps_usecount != 0)
goto unlock;
if (sc->ps_enabled &&
!(sc->sc_flags & (SC_OP_WAIT_FOR_BEACON |
SC_OP_WAIT_FOR_CAB |
SC_OP_WAIT_FOR_PSPOLL_DATA |
SC_OP_WAIT_FOR_TX_ACK)))
ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
unlock:
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
/*
* 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.
*/
int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
struct ath9k_channel *hchan)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_conf *conf = &common->hw->conf;
bool fastcc = true, stopped;
struct ieee80211_channel *channel = hw->conf.channel;
int r;
if (sc->sc_flags & SC_OP_INVALID)
return -EIO;
ath9k_ps_wakeup(sc);
/*
* 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);
ath_drain_all_txq(sc, false);
stopped = ath_stoprecv(sc);
/* 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;
ath_print(common, ATH_DBG_CONFIG,
"(%u MHz) -> (%u MHz), conf_is_ht40: %d\n",
sc->sc_ah->curchan->channel,
channel->center_freq, conf_is_ht40(conf));
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, hchan, fastcc);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to reset channel (%u Mhz) "
"reset status %d\n",
channel->center_freq, r);
spin_unlock_bh(&sc->sc_resetlock);
goto ps_restore;
}
spin_unlock_bh(&sc->sc_resetlock);
sc->sc_flags &= ~SC_OP_FULL_RESET;
if (ath_startrecv(sc) != 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to restart recv logic\n");
r = -EIO;
goto ps_restore;
}
ath_cache_conf_rate(sc, &hw->conf);
ath_update_txpow(sc);
ath9k_hw_set_interrupts(ah, sc->imask);
ps_restore:
ath9k_ps_restore(sc);
return r;
}
/*
* 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_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;
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) >= ATH_LONG_CALINTERVAL) {
longcal = true;
ath_print(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_print(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) >= ATH_ANI_POLLINTERVAL) {
aniflag = true;
common->ani.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, ah->curchan);
/* Perform calibration if necessary */
if (longcal || shortcal) {
common->ani.caldone =
ath9k_hw_calibrate(ah,
ah->curchan,
common->rx_chainmask,
longcal);
if (longcal)
common->ani.noise_floor = ath9k_hw_getchan_noise(ah,
ah->curchan);
ath_print(common, ATH_DBG_ANI,
" calibrate chan %u/%x nf: %d\n",
ah->curchan->channel,
ah->curchan->channelFlags,
common->ani.noise_floor);
}
}
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)ATH_ANI_POLLINTERVAL);
if (!common->ani.caldone)
cal_interval = min(cal_interval, (u32)short_cal_interval);
mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
}
static void ath_start_ani(struct ath_common *common)
{
unsigned long timestamp = jiffies_to_msecs(jiffies);
common->ani.longcal_timer = timestamp;
common->ani.shortcal_timer = timestamp;
common->ani.checkani_timer = timestamp;
mod_timer(&common->ani.timer,
jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
}
/*
* Update tx/rx chainmask. For legacy association,
* hard code chainmask to 1x1, for 11n association, use
* the chainmask configuration, for bt coexistence, use
* the chainmask configuration even in legacy mode.
*/
void ath_update_chainmask(struct ath_softc *sc, int is_ht)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
if ((sc->sc_flags & SC_OP_SCANNING) || is_ht ||
(ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE)) {
common->tx_chainmask = ah->caps.tx_chainmask;
common->rx_chainmask = ah->caps.rx_chainmask;
} else {
common->tx_chainmask = 1;
common->rx_chainmask = 1;
}
ath_print(common, ATH_DBG_CONFIG,
"tx chmask: %d, rx chmask: %d\n",
common->tx_chainmask,
common->rx_chainmask);
}
static 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_HT_MAX_AMPDU_FACTOR +
sta->ht_cap.ampdu_factor);
an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
an->last_rssi = ATH_RSSI_DUMMY_MARKER;
}
}
static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
{
struct ath_node *an = (struct ath_node *)sta->drv_priv;
if (sc->sc_flags & SC_OP_TXAGGR)
ath_tx_node_cleanup(sc, an);
}
static void ath9k_tasklet(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);
u32 status = sc->intrstatus;
ath9k_ps_wakeup(sc);
if (status & ATH9K_INT_FATAL) {
ath_reset(sc, false);
ath9k_ps_restore(sc);
return;
}
if (status & (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN)) {
spin_lock_bh(&sc->rx.rxflushlock);
ath_rx_tasklet(sc, 0);
spin_unlock_bh(&sc->rx.rxflushlock);
}
if (status & ATH9K_INT_TX)
ath_tx_tasklet(sc);
if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
/*
* TSF sync does not look correct; remain awake to sync with
* the next Beacon.
*/
ath_print(common, ATH_DBG_PS,
"TSFOOR - Sync with next Beacon\n");
sc->sc_flags |= SC_OP_WAIT_FOR_BEACON | SC_OP_BEACON_SYNC;
}
if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
if (status & ATH9K_INT_GENTIMER)
ath_gen_timer_isr(sc->sc_ah);
/* re-enable hardware interrupt */
ath9k_hw_set_interrupts(ah, sc->imask);
ath9k_ps_restore(sc);
}
irqreturn_t ath_isr(int irq, void *dev)
{
#define SCHED_INTR ( \
ATH9K_INT_FATAL | \
ATH9K_INT_RXORN | \
ATH9K_INT_RXEOL | \
ATH9K_INT_RX | \
ATH9K_INT_TX | \
ATH9K_INT_BMISS | \
ATH9K_INT_CST | \
ATH9K_INT_TSFOOR | \
ATH9K_INT_GENTIMER)
struct ath_softc *sc = dev;
struct ath_hw *ah = sc->sc_ah;
enum ath9k_int status;
bool sched = false;
/*
* The hardware is not ready/present, don't
* touch anything. Note this can happen early
* on if the IRQ is shared.
*/
if (sc->sc_flags & SC_OP_INVALID)
return IRQ_NONE;
/* shared irq, not for us */
if (!ath9k_hw_intrpend(ah))
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->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;
/* Cache the status */
sc->intrstatus = status;
if (status & SCHED_INTR)
sched = true;
/*
* If a FATAL or RXORN interrupt is received, we have to reset the
* chip immediately.
*/
if (status & (ATH9K_INT_FATAL | ATH9K_INT_RXORN))
goto chip_reset;
if (status & ATH9K_INT_SWBA)
tasklet_schedule(&sc->bcon_tasklet);
if (status & ATH9K_INT_TXURN)
ath9k_hw_updatetxtriglevel(ah, 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);
ath9k_hw_set_interrupts(ah, sc->imask);
}
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
if (status & ATH9K_INT_TIM_TIMER) {
/* Clear RxAbort bit so that we can
* receive frames */
ath9k_setpower(sc, ATH9K_PM_AWAKE);
ath9k_hw_setrxabort(sc->sc_ah, 0);
sc->sc_flags |= SC_OP_WAIT_FOR_BEACON;
}
chip_reset:
ath_debug_stat_interrupt(sc, status);
if (sched) {
/* turn off every interrupt except SWBA */
ath9k_hw_set_interrupts(ah, (sc->imask & ATH9K_INT_SWBA));
tasklet_schedule(&sc->intr_tq);
}
return IRQ_HANDLED;
#undef SCHED_INTR
}
static u32 ath_get_extchanmode(struct ath_softc *sc,
struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type)
{
u32 chanmode = 0;
switch (chan->band) {
case IEEE80211_BAND_2GHZ:
switch(channel_type) {
case NL80211_CHAN_NO_HT:
case NL80211_CHAN_HT20:
chanmode = CHANNEL_G_HT20;
break;
case NL80211_CHAN_HT40PLUS:
chanmode = CHANNEL_G_HT40PLUS;
break;
case NL80211_CHAN_HT40MINUS:
chanmode = CHANNEL_G_HT40MINUS;
break;
}
break;
case IEEE80211_BAND_5GHZ:
switch(channel_type) {
case NL80211_CHAN_NO_HT:
case NL80211_CHAN_HT20:
chanmode = CHANNEL_A_HT20;
break;
case NL80211_CHAN_HT40PLUS:
chanmode = CHANNEL_A_HT40PLUS;
break;
case NL80211_CHAN_HT40MINUS:
chanmode = CHANNEL_A_HT40MINUS;
break;
}
break;
default:
break;
}
return chanmode;
}
static int ath_setkey_tkip(struct ath_common *common, u16 keyix, const u8 *key,
struct ath9k_keyval *hk, const u8 *addr,
bool authenticator)
{
struct ath_hw *ah = common->ah;
const u8 *key_rxmic;
const u8 *key_txmic;
key_txmic = key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
if (addr == NULL) {
/*
* Group key installation - only two key cache entries are used
* regardless of splitmic capability since group key is only
* used either for TX or RX.
*/
if (authenticator) {
memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_mic));
} else {
memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
memcpy(hk->kv_txmic, key_rxmic, sizeof(hk->kv_mic));
}
return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr);
}
if (!common->splitmic) {
/* TX and RX keys share the same key cache entry. */
memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr);
}
/* Separate key cache entries for TX and RX */
/* TX key goes at first index, RX key at +32. */
memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
if (!ath9k_hw_set_keycache_entry(ah, keyix, hk, NULL)) {
/* TX MIC entry failed. No need to proceed further */
ath_print(common, ATH_DBG_FATAL,
"Setting TX MIC Key Failed\n");
return 0;
}
memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
/* XXX delete tx key on failure? */
return ath9k_hw_set_keycache_entry(ah, keyix + 32, hk, addr);
}
static int ath_reserve_key_cache_slot_tkip(struct ath_common *common)
{
int i;
for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) {
if (test_bit(i, common->keymap) ||
test_bit(i + 64, common->keymap))
continue; /* At least one part of TKIP key allocated */
if (common->splitmic &&
(test_bit(i + 32, common->keymap) ||
test_bit(i + 64 + 32, common->keymap)))
continue; /* At least one part of TKIP key allocated */
/* Found a free slot for a TKIP key */
return i;
}
return -1;
}
static int ath_reserve_key_cache_slot(struct ath_common *common)
{
int i;
/* First, try to find slots that would not be available for TKIP. */
if (common->splitmic) {
for (i = IEEE80211_WEP_NKID; i < common->keymax / 4; i++) {
if (!test_bit(i, common->keymap) &&
(test_bit(i + 32, common->keymap) ||
test_bit(i + 64, common->keymap) ||
test_bit(i + 64 + 32, common->keymap)))
return i;
if (!test_bit(i + 32, common->keymap) &&
(test_bit(i, common->keymap) ||
test_bit(i + 64, common->keymap) ||
test_bit(i + 64 + 32, common->keymap)))
return i + 32;
if (!test_bit(i + 64, common->keymap) &&
(test_bit(i , common->keymap) ||
test_bit(i + 32, common->keymap) ||
test_bit(i + 64 + 32, common->keymap)))
return i + 64;
if (!test_bit(i + 64 + 32, common->keymap) &&
(test_bit(i, common->keymap) ||
test_bit(i + 32, common->keymap) ||
test_bit(i + 64, common->keymap)))
return i + 64 + 32;
}
} else {
for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) {
if (!test_bit(i, common->keymap) &&
test_bit(i + 64, common->keymap))
return i;
if (test_bit(i, common->keymap) &&
!test_bit(i + 64, common->keymap))
return i + 64;
}
}
/* No partially used TKIP slots, pick any available slot */
for (i = IEEE80211_WEP_NKID; i < common->keymax; i++) {
/* Do not allow slots that could be needed for TKIP group keys
* to be used. This limitation could be removed if we know that
* TKIP will not be used. */
if (i >= 64 && i < 64 + IEEE80211_WEP_NKID)
continue;
if (common->splitmic) {
if (i >= 32 && i < 32 + IEEE80211_WEP_NKID)
continue;
if (i >= 64 + 32 && i < 64 + 32 + IEEE80211_WEP_NKID)
continue;
}
if (!test_bit(i, common->keymap))
return i; /* Found a free slot for a key */
}
/* No free slot found */
return -1;
}
static int ath_key_config(struct ath_common *common,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct ath_hw *ah = common->ah;
struct ath9k_keyval hk;
const u8 *mac = NULL;
int ret = 0;
int idx;
memset(&hk, 0, sizeof(hk));
switch (key->alg) {
case ALG_WEP:
hk.kv_type = ATH9K_CIPHER_WEP;
break;
case ALG_TKIP:
hk.kv_type = ATH9K_CIPHER_TKIP;
break;
case ALG_CCMP:
hk.kv_type = ATH9K_CIPHER_AES_CCM;
break;
default:
return -EOPNOTSUPP;
}
hk.kv_len = key->keylen;
memcpy(hk.kv_val, key->key, key->keylen);
if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
/* For now, use the default keys for broadcast keys. This may
* need to change with virtual interfaces. */
idx = key->keyidx;
} else if (key->keyidx) {
if (WARN_ON(!sta))
return -EOPNOTSUPP;
mac = sta->addr;
if (vif->type != NL80211_IFTYPE_AP) {
/* Only keyidx 0 should be used with unicast key, but
* allow this for client mode for now. */
idx = key->keyidx;
} else
return -EIO;
} else {
if (WARN_ON(!sta))
return -EOPNOTSUPP;
mac = sta->addr;
if (key->alg == ALG_TKIP)
idx = ath_reserve_key_cache_slot_tkip(common);
else
idx = ath_reserve_key_cache_slot(common);
if (idx < 0)
return -ENOSPC; /* no free key cache entries */
}
if (key->alg == ALG_TKIP)
ret = ath_setkey_tkip(common, idx, key->key, &hk, mac,
vif->type == NL80211_IFTYPE_AP);
else
ret = ath9k_hw_set_keycache_entry(ah, idx, &hk, mac);
if (!ret)
return -EIO;
set_bit(idx, common->keymap);
if (key->alg == ALG_TKIP) {
set_bit(idx + 64, common->keymap);
if (common->splitmic) {
set_bit(idx + 32, common->keymap);
set_bit(idx + 64 + 32, common->keymap);
}
}
return idx;
}
static void ath_key_delete(struct ath_common *common, struct ieee80211_key_conf *key)
{
struct ath_hw *ah = common->ah;
ath9k_hw_keyreset(ah, key->hw_key_idx);
if (key->hw_key_idx < IEEE80211_WEP_NKID)
return;
clear_bit(key->hw_key_idx, common->keymap);
if (key->alg != ALG_TKIP)
return;
clear_bit(key->hw_key_idx + 64, common->keymap);
if (common->splitmic) {
clear_bit(key->hw_key_idx + 32, common->keymap);
clear_bit(key->hw_key_idx + 64 + 32, common->keymap);
}
}
static void setup_ht_cap(struct ath_softc *sc,
struct ieee80211_sta_ht_cap *ht_info)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
u8 tx_streams, rx_streams;
ht_info->ht_supported = true;
ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
IEEE80211_HT_CAP_SM_PS |
IEEE80211_HT_CAP_SGI_40 |
IEEE80211_HT_CAP_DSSSCCK40;
ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;
/* set up supported mcs set */
memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
tx_streams = !(common->tx_chainmask & (common->tx_chainmask - 1)) ?
1 : 2;
rx_streams = !(common->rx_chainmask & (common->rx_chainmask - 1)) ?
1 : 2;
if (tx_streams != rx_streams) {
ath_print(common, ATH_DBG_CONFIG,
"TX streams %d, RX streams: %d\n",
tx_streams, rx_streams);
ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
ht_info->mcs.tx_params |= ((tx_streams - 1) <<
IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
}
ht_info->mcs.rx_mask[0] = 0xff;
if (rx_streams >= 2)
ht_info->mcs.rx_mask[1] = 0xff;
ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
}
static void ath9k_bss_assoc_info(struct ath_softc *sc,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
if (bss_conf->assoc) {
ath_print(common, ATH_DBG_CONFIG,
"Bss Info ASSOC %d, bssid: %pM\n",
bss_conf->aid, common->curbssid);
/* New association, store aid */
common->curaid = bss_conf->aid;
ath9k_hw_write_associd(ah);
/*
* Request a re-configuration of Beacon related timers
* on the receipt of the first Beacon frame (i.e.,
* after time sync with the AP).
*/
sc->sc_flags |= SC_OP_BEACON_SYNC;
/* Configure the beacon */
ath_beacon_config(sc, vif);
/* Reset rssi stats */
sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
ath_start_ani(common);
} else {
ath_print(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
common->curaid = 0;
/* Stop ANI */
del_timer_sync(&common->ani.timer);
}
}
/********************************/
/* LED functions */
/********************************/
static void ath_led_blink_work(struct work_struct *work)
{
struct ath_softc *sc = container_of(work, struct ath_softc,
ath_led_blink_work.work);
if (!(sc->sc_flags & SC_OP_LED_ASSOCIATED))
return;
if ((sc->led_on_duration == ATH_LED_ON_DURATION_IDLE) ||
(sc->led_off_duration == ATH_LED_OFF_DURATION_IDLE))
ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 0);
else
ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin,
(sc->sc_flags & SC_OP_LED_ON) ? 1 : 0);
ieee80211_queue_delayed_work(sc->hw,
&sc->ath_led_blink_work,
(sc->sc_flags & SC_OP_LED_ON) ?
msecs_to_jiffies(sc->led_off_duration) :
msecs_to_jiffies(sc->led_on_duration));
sc->led_on_duration = sc->led_on_cnt ?
max((ATH_LED_ON_DURATION_IDLE - sc->led_on_cnt), 25) :
ATH_LED_ON_DURATION_IDLE;
sc->led_off_duration = sc->led_off_cnt ?
max((ATH_LED_OFF_DURATION_IDLE - sc->led_off_cnt), 10) :
ATH_LED_OFF_DURATION_IDLE;
sc->led_on_cnt = sc->led_off_cnt = 0;
if (sc->sc_flags & SC_OP_LED_ON)
sc->sc_flags &= ~SC_OP_LED_ON;
else
sc->sc_flags |= SC_OP_LED_ON;
}
static void ath_led_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct ath_led *led = container_of(led_cdev, struct ath_led, led_cdev);
struct ath_softc *sc = led->sc;
switch (brightness) {
case LED_OFF:
if (led->led_type == ATH_LED_ASSOC ||
led->led_type == ATH_LED_RADIO) {
ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin,
(led->led_type == ATH_LED_RADIO));
sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
if (led->led_type == ATH_LED_RADIO)
sc->sc_flags &= ~SC_OP_LED_ON;
} else {
sc->led_off_cnt++;
}
break;
case LED_FULL:
if (led->led_type == ATH_LED_ASSOC) {
sc->sc_flags |= SC_OP_LED_ASSOCIATED;
ieee80211_queue_delayed_work(sc->hw,
&sc->ath_led_blink_work, 0);
} else if (led->led_type == ATH_LED_RADIO) {
ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 0);
sc->sc_flags |= SC_OP_LED_ON;
} else {
sc->led_on_cnt++;
}
break;
default:
break;
}
}
static int ath_register_led(struct ath_softc *sc, struct ath_led *led,
char *trigger)
{
int ret;
led->sc = sc;
led->led_cdev.name = led->name;
led->led_cdev.default_trigger = trigger;
led->led_cdev.brightness_set = ath_led_brightness;
ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &led->led_cdev);
if (ret)
ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
"Failed to register led:%s", led->name);
else
led->registered = 1;
return ret;
}
static void ath_unregister_led(struct ath_led *led)
{
if (led->registered) {
led_classdev_unregister(&led->led_cdev);
led->registered = 0;
}
}
static void ath_deinit_leds(struct ath_softc *sc)
{
ath_unregister_led(&sc->assoc_led);
sc->sc_flags &= ~SC_OP_LED_ASSOCIATED;
ath_unregister_led(&sc->tx_led);
ath_unregister_led(&sc->rx_led);
ath_unregister_led(&sc->radio_led);
ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
}
static void ath_init_leds(struct ath_softc *sc)
{
char *trigger;
int ret;
if (AR_SREV_9287(sc->sc_ah))
sc->sc_ah->led_pin = ATH_LED_PIN_9287;
else
sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
/* Configure gpio 1 for output */
ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
/* LED off, active low */
ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
INIT_DELAYED_WORK(&sc->ath_led_blink_work, ath_led_blink_work);
trigger = ieee80211_get_radio_led_name(sc->hw);
snprintf(sc->radio_led.name, sizeof(sc->radio_led.name),
"ath9k-%s::radio", wiphy_name(sc->hw->wiphy));
ret = ath_register_led(sc, &sc->radio_led, trigger);
sc->radio_led.led_type = ATH_LED_RADIO;
if (ret)
goto fail;
trigger = ieee80211_get_assoc_led_name(sc->hw);
snprintf(sc->assoc_led.name, sizeof(sc->assoc_led.name),
"ath9k-%s::assoc", wiphy_name(sc->hw->wiphy));
ret = ath_register_led(sc, &sc->assoc_led, trigger);
sc->assoc_led.led_type = ATH_LED_ASSOC;
if (ret)
goto fail;
trigger = ieee80211_get_tx_led_name(sc->hw);
snprintf(sc->tx_led.name, sizeof(sc->tx_led.name),
"ath9k-%s::tx", wiphy_name(sc->hw->wiphy));
ret = ath_register_led(sc, &sc->tx_led, trigger);
sc->tx_led.led_type = ATH_LED_TX;
if (ret)
goto fail;
trigger = ieee80211_get_rx_led_name(sc->hw);
snprintf(sc->rx_led.name, sizeof(sc->rx_led.name),
"ath9k-%s::rx", wiphy_name(sc->hw->wiphy));
ret = ath_register_led(sc, &sc->rx_led, trigger);
sc->rx_led.led_type = ATH_LED_RX;
if (ret)
goto fail;
return;
fail:
cancel_delayed_work_sync(&sc->ath_led_blink_work);
ath_deinit_leds(sc);
}
void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_channel *channel = hw->conf.channel;
int r;
ath9k_ps_wakeup(sc);
ath9k_hw_configpcipowersave(ah, 0, 0);
if (!ah->curchan)
ah->curchan = ath_get_curchannel(sc, sc->hw);
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, ah->curchan, false);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to reset channel %u (%uMhz) ",
"reset status %d\n",
channel->center_freq, r);
}
spin_unlock_bh(&sc->sc_resetlock);
ath_update_txpow(sc);
if (ath_startrecv(sc) != 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to restart recv logic\n");
return;
}
if (sc->sc_flags & SC_OP_BEACONS)
ath_beacon_config(sc, NULL); /* restart beacons */
/* Re-Enable interrupts */
ath9k_hw_set_interrupts(ah, sc->imask);
/* Enable LED */
ath9k_hw_cfg_output(ah, ah->led_pin,
AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
ath9k_hw_set_gpio(ah, ah->led_pin, 0);
ieee80211_wake_queues(hw);
ath9k_ps_restore(sc);
}
void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
{
struct ath_hw *ah = sc->sc_ah;
struct ieee80211_channel *channel = hw->conf.channel;
int r;
ath9k_ps_wakeup(sc);
ieee80211_stop_queues(hw);
/* Disable LED */
ath9k_hw_set_gpio(ah, ah->led_pin, 1);
ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
/* Disable interrupts */
ath9k_hw_set_interrupts(ah, 0);
ath_drain_all_txq(sc, false); /* clear pending tx frames */
ath_stoprecv(sc); /* turn off frame recv */
ath_flushrecv(sc); /* flush recv queue */
if (!ah->curchan)
ah->curchan = ath_get_curchannel(sc, hw);
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, ah->curchan, false);
if (r) {
ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
"Unable to reset channel %u (%uMhz) "
"reset status %d\n",
channel->center_freq, r);
}
spin_unlock_bh(&sc->sc_resetlock);
ath9k_hw_phy_disable(ah);
ath9k_hw_configpcipowersave(ah, 1, 1);
ath9k_ps_restore(sc);
ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
}
/*******************/
/* Rfkill */
/*******************/
static bool ath_is_rfkill_set(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
return ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
ah->rfkill_polarity;
}
static void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
bool blocked = !!ath_is_rfkill_set(sc);
wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
}
static void ath_start_rfkill_poll(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
wiphy_rfkill_start_polling(sc->hw->wiphy);
}
static void ath9k_uninit_hw(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
BUG_ON(!ah);
ath9k_exit_debug(ah);
ath9k_hw_detach(ah);
sc->sc_ah = NULL;
}
static void ath_clean_core(struct ath_softc *sc)
{
struct ieee80211_hw *hw = sc->hw;
struct ath_hw *ah = sc->sc_ah;
int i = 0;
ath9k_ps_wakeup(sc);
dev_dbg(sc->dev, "Detach ATH hw\n");
ath_deinit_leds(sc);
wiphy_rfkill_stop_polling(sc->hw->wiphy);
for (i = 0; i < sc->num_sec_wiphy; i++) {
struct ath_wiphy *aphy = sc->sec_wiphy[i];
if (aphy == NULL)
continue;
sc->sec_wiphy[i] = NULL;
ieee80211_unregister_hw(aphy->hw);
ieee80211_free_hw(aphy->hw);
}
ieee80211_unregister_hw(hw);
ath_rx_cleanup(sc);
ath_tx_cleanup(sc);
tasklet_kill(&sc->intr_tq);
tasklet_kill(&sc->bcon_tasklet);
if (!(sc->sc_flags & SC_OP_INVALID))
ath9k_setpower(sc, ATH9K_PM_AWAKE);
/* cleanup tx queues */
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
if (ATH_TXQ_SETUP(sc, i))
ath_tx_cleanupq(sc, &sc->tx.txq[i]);
if ((sc->btcoex.no_stomp_timer) &&
ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
ath_gen_timer_free(ah, sc->btcoex.no_stomp_timer);
}
void ath_detach(struct ath_softc *sc)
{
ath_clean_core(sc);
ath9k_uninit_hw(sc);
}
void ath_cleanup(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
ath_clean_core(sc);
free_irq(sc->irq, sc);
ath_bus_cleanup(common);
kfree(sc->sec_wiphy);
ieee80211_free_hw(sc->hw);
ath9k_uninit_hw(sc);
}
static int ath9k_reg_notifier(struct wiphy *wiphy,
struct regulatory_request *request)
{
struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_regulatory *reg = ath9k_hw_regulatory(sc->sc_ah);
return ath_reg_notifier_apply(wiphy, request, reg);
}
/*
* Detects if there is any priority bt traffic
*/
static void ath_detect_bt_priority(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_hw *ah = sc->sc_ah;
if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
btcoex->bt_priority_cnt++;
if (time_after(jiffies, btcoex->bt_priority_time +
msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
"BT priority traffic detected");
sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED;
} else {
sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
}
btcoex->bt_priority_cnt = 0;
btcoex->bt_priority_time = jiffies;
}
}
/*
* Configures appropriate weight based on stomp type.
*/
static void ath9k_btcoex_bt_stomp(struct ath_softc *sc,
enum ath_stomp_type stomp_type)
{
struct ath_hw *ah = sc->sc_ah;
switch (stomp_type) {
case ATH_BTCOEX_STOMP_ALL:
ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
AR_STOMP_ALL_WLAN_WGHT);
break;
case ATH_BTCOEX_STOMP_LOW:
ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
AR_STOMP_LOW_WLAN_WGHT);
break;
case ATH_BTCOEX_STOMP_NONE:
ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
AR_STOMP_NONE_WLAN_WGHT);
break;
default:
ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
"Invalid Stomptype\n");
break;
}
ath9k_hw_btcoex_enable(ah);
}
static void ath9k_gen_timer_start(struct ath_hw *ah,
struct ath_gen_timer *timer,
u32 timer_next,
u32 timer_period)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath_softc *sc = (struct ath_softc *) common->priv;
ath9k_hw_gen_timer_start(ah, timer, timer_next, timer_period);
if ((sc->imask & ATH9K_INT_GENTIMER) == 0) {
ath9k_hw_set_interrupts(ah, 0);
sc->imask |= ATH9K_INT_GENTIMER;
ath9k_hw_set_interrupts(ah, sc->imask);
}
}
static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath_softc *sc = (struct ath_softc *) common->priv;
struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
ath9k_hw_gen_timer_stop(ah, timer);
/* if no timer is enabled, turn off interrupt mask */
if (timer_table->timer_mask.val == 0) {
ath9k_hw_set_interrupts(ah, 0);
sc->imask &= ~ATH9K_INT_GENTIMER;
ath9k_hw_set_interrupts(ah, sc->imask);
}
}
/*
* This is the master bt coex timer which runs for every
* 45ms, bt traffic will be given priority during 55% of this
* period while wlan gets remaining 45%
*/
static void ath_btcoex_period_timer(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *) data;
struct ath_hw *ah = sc->sc_ah;
struct ath_btcoex *btcoex = &sc->btcoex;
ath_detect_bt_priority(sc);
spin_lock_bh(&btcoex->btcoex_lock);
ath9k_btcoex_bt_stomp(sc, btcoex->bt_stomp_type);
spin_unlock_bh(&btcoex->btcoex_lock);
if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
if (btcoex->hw_timer_enabled)
ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
ath9k_gen_timer_start(ah,
btcoex->no_stomp_timer,
(ath9k_hw_gettsf32(ah) +
btcoex->btcoex_no_stomp),
btcoex->btcoex_no_stomp * 10);
btcoex->hw_timer_enabled = true;
}
mod_timer(&btcoex->period_timer, jiffies +
msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD));
}
/*
* Generic tsf based hw timer which configures weight
* registers to time slice between wlan and bt traffic
*/
static void ath_btcoex_no_stomp_timer(void *arg)
{
struct ath_softc *sc = (struct ath_softc *)arg;
struct ath_hw *ah = sc->sc_ah;
struct ath_btcoex *btcoex = &sc->btcoex;
ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
"no stomp timer running \n");
spin_lock_bh(&btcoex->btcoex_lock);
if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW)
ath9k_btcoex_bt_stomp(sc, ATH_BTCOEX_STOMP_NONE);
else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
ath9k_btcoex_bt_stomp(sc, ATH_BTCOEX_STOMP_LOW);
spin_unlock_bh(&btcoex->btcoex_lock);
}
static int ath_init_btcoex_timer(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
btcoex->btcoex_period / 100;
setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
(unsigned long) sc);
spin_lock_init(&btcoex->btcoex_lock);
btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
ath_btcoex_no_stomp_timer,
ath_btcoex_no_stomp_timer,
(void *) sc, AR_FIRST_NDP_TIMER);
if (!btcoex->no_stomp_timer)
return -ENOMEM;
return 0;
}
/*
* Read and write, they both share the same lock. We do this to serialize
* reads and writes on Atheros 802.11n PCI devices only. This is required
* as the FIFO on these devices can only accept sanely 2 requests. After
* that the device goes bananas. Serializing the reads/writes prevents this
* from happening.
*/
static void ath9k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
{
struct ath_hw *ah = (struct ath_hw *) hw_priv;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_softc *sc = (struct ath_softc *) common->priv;
if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
unsigned long flags;
spin_lock_irqsave(&sc->sc_serial_rw, flags);
iowrite32(val, sc->mem + reg_offset);
spin_unlock_irqrestore(&sc->sc_serial_rw, flags);
} else
iowrite32(val, sc->mem + reg_offset);
}
static unsigned int ath9k_ioread32(void *hw_priv, u32 reg_offset)
{
struct ath_hw *ah = (struct ath_hw *) hw_priv;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_softc *sc = (struct ath_softc *) common->priv;
u32 val;
if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
unsigned long flags;
spin_lock_irqsave(&sc->sc_serial_rw, flags);
val = ioread32(sc->mem + reg_offset);
spin_unlock_irqrestore(&sc->sc_serial_rw, flags);
} else
val = ioread32(sc->mem + reg_offset);
return val;
}
static const struct ath_ops ath9k_common_ops = {
.read = ath9k_ioread32,
.write = ath9k_iowrite32,
};
/*
* Initialize and fill ath_softc, ath_sofct is the
* "Software Carrier" struct. Historically it has existed
* to allow the separation between hardware specific
* variables (now in ath_hw) and driver specific variables.
*/
static int ath_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
const struct ath_bus_ops *bus_ops)
{
struct ath_hw *ah = NULL;
struct ath_common *common;
int r = 0, i;
int csz = 0;
int qnum;
/* XXX: hardware will not be ready until ath_open() being called */
sc->sc_flags |= SC_OP_INVALID;
spin_lock_init(&sc->wiphy_lock);
spin_lock_init(&sc->sc_resetlock);
spin_lock_init(&sc->sc_serial_rw);
spin_lock_init(&sc->sc_pm_lock);
mutex_init(&sc->mutex);
tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
tasklet_init(&sc->bcon_tasklet, ath_beacon_tasklet,
(unsigned long)sc);
ah = kzalloc(sizeof(struct ath_hw), GFP_KERNEL);
if (!ah)
return -ENOMEM;
ah->hw_version.devid = devid;
ah->hw_version.subsysid = subsysid;
sc->sc_ah = ah;
common = ath9k_hw_common(ah);
common->ops = &ath9k_common_ops;
common->bus_ops = bus_ops;
common->ah = ah;
common->hw = sc->hw;
common->priv = sc;
common->debug_mask = ath9k_debug;
/*
* Cache line size is used to size and align various
* structures used to communicate with the hardware.
*/
ath_read_cachesize(common, &csz);
/* XXX assert csz is non-zero */
common->cachelsz = csz << 2; /* convert to bytes */
r = ath9k_hw_init(ah);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to initialize hardware; "
"initialization status: %d\n", r);
goto bad_free_hw;
}
if (ath9k_init_debug(ah) < 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to create debugfs files\n");
goto bad_free_hw;
}
/* Get the hardware key cache size. */
common->keymax = ah->caps.keycache_size;
if (common->keymax > ATH_KEYMAX) {
ath_print(common, ATH_DBG_ANY,
"Warning, using only %u entries in %u key cache\n",
ATH_KEYMAX, common->keymax);
common->keymax = ATH_KEYMAX;
}
/*
* Reset the key cache since some parts do not
* reset the contents on initial power up.
*/
for (i = 0; i < common->keymax; i++)
ath9k_hw_keyreset(ah, (u16) i);
/* default to MONITOR mode */
sc->sc_ah->opmode = NL80211_IFTYPE_MONITOR;
/*
* 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->beacon.beaconq = ath9k_hw_beaconq_setup(ah);
if (sc->beacon.beaconq == -1) {
ath_print(common, ATH_DBG_FATAL,
"Unable to setup a beacon xmit queue\n");
r = -EIO;
goto bad2;
}
sc->beacon.cabq = ath_txq_setup(sc, ATH9K_TX_QUEUE_CAB, 0);
if (sc->beacon.cabq == NULL) {
ath_print(common, ATH_DBG_FATAL,
"Unable to setup CAB xmit queue\n");
r = -EIO;
goto bad2;
}
sc->config.cabqReadytime = ATH_CABQ_READY_TIME;
ath_cabq_update(sc);
for (i = 0; i < ARRAY_SIZE(sc->tx.hwq_map); i++)
sc->tx.hwq_map[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)) {
ath_print(common, ATH_DBG_FATAL,
"Unable to setup xmit queue for BK traffic\n");
r = -EIO;
goto bad2;
}
if (!ath_tx_setup(sc, ATH9K_WME_AC_BE)) {
ath_print(common, ATH_DBG_FATAL,
"Unable to setup xmit queue for BE traffic\n");
r = -EIO;
goto bad2;
}
if (!ath_tx_setup(sc, ATH9K_WME_AC_VI)) {
ath_print(common, ATH_DBG_FATAL,
"Unable to setup xmit queue for VI traffic\n");
r = -EIO;
goto bad2;
}
if (!ath_tx_setup(sc, ATH9K_WME_AC_VO)) {
ath_print(common, ATH_DBG_FATAL,
"Unable to setup xmit queue for VO traffic\n");
r = -EIO;
goto bad2;
}
/* Initializes the noise floor to a reasonable default value.
* Later on this will be updated during ANI processing. */
common->ani.noise_floor = ATH_DEFAULT_NOISE_FLOOR;
setup_timer(&common->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))
common->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->config.txpowlimit = ATH_TXPOWER_MAX;
/* 11n Capabilities */
if (ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
sc->sc_flags |= SC_OP_TXAGGR;
sc->sc_flags |= SC_OP_RXAGGR;
}
common->tx_chainmask = ah->caps.tx_chainmask;
common->rx_chainmask = ah->caps.rx_chainmask;
ath9k_hw_setcapability(ah, ATH9K_CAP_DIVERSITY, 1, true, NULL);
sc->rx.defant = ath9k_hw_getdefantenna(ah);
if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
memcpy(common->bssidmask, ath_bcast_mac, ETH_ALEN);
sc->beacon.slottime = ATH9K_SLOT_TIME_9; /* default to short slot time */
/* initialize beacon slots */
for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
sc->beacon.bslot[i] = NULL;
sc->beacon.bslot_aphy[i] = NULL;
}
/* setup channels and rates */
if (test_bit(ATH9K_MODE_11G, sc->sc_ah->caps.wireless_modes)) {
sc->sbands[IEEE80211_BAND_2GHZ].channels = ath9k_2ghz_chantable;
sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
sc->sbands[IEEE80211_BAND_2GHZ].n_channels =
ARRAY_SIZE(ath9k_2ghz_chantable);
sc->sbands[IEEE80211_BAND_2GHZ].bitrates = ath9k_legacy_rates;
sc->sbands[IEEE80211_BAND_2GHZ].n_bitrates =
ARRAY_SIZE(ath9k_legacy_rates);
}
if (test_bit(ATH9K_MODE_11A, sc->sc_ah->caps.wireless_modes)) {
sc->sbands[IEEE80211_BAND_5GHZ].channels = ath9k_5ghz_chantable;
sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;
sc->sbands[IEEE80211_BAND_5GHZ].n_channels =
ARRAY_SIZE(ath9k_5ghz_chantable);
sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
ath9k_legacy_rates + 4;
sc->sbands[IEEE80211_BAND_5GHZ].n_bitrates =
ARRAY_SIZE(ath9k_legacy_rates) - 4;
}
switch (ah->btcoex_hw.scheme) {
case ATH_BTCOEX_CFG_NONE:
break;
case ATH_BTCOEX_CFG_2WIRE:
ath9k_hw_btcoex_init_2wire(ah);
break;
case ATH_BTCOEX_CFG_3WIRE:
ath9k_hw_btcoex_init_3wire(ah);
r = ath_init_btcoex_timer(sc);
if (r)
goto bad2;
qnum = ath_tx_get_qnum(sc, ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BE);
ath9k_hw_init_btcoex_hw(ah, qnum);
sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
break;
default:
WARN_ON(1);
break;
}
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->tx.txq[i]);
bad_free_hw:
ath9k_uninit_hw(sc);
return r;
}
void ath_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
{
hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_AMPDU_AGGREGATION |
IEEE80211_HW_SUPPORTS_PS |
IEEE80211_HW_PS_NULLFUNC_STACK |
IEEE80211_HW_SPECTRUM_MGMT;
if (AR_SREV_9160_10_OR_LATER(sc->sc_ah) || modparam_nohwcrypt)
hw->flags |= IEEE80211_HW_MFP_CAPABLE;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC) |
BIT(NL80211_IFTYPE_MESH_POINT);
hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
hw->queues = 4;
hw->max_rates = 4;
hw->channel_change_time = 5000;
hw->max_listen_interval = 10;
/* Hardware supports 10 but we use 4 */
hw->max_rate_tries = 4;
hw->sta_data_size = sizeof(struct ath_node);
hw->vif_data_size = sizeof(struct ath_vif);
hw->rate_control_algorithm = "ath9k_rate_control";
if (test_bit(ATH9K_MODE_11G, sc->sc_ah->caps.wireless_modes))
hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&sc->sbands[IEEE80211_BAND_2GHZ];
if (test_bit(ATH9K_MODE_11A, sc->sc_ah->caps.wireless_modes))
hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
&sc->sbands[IEEE80211_BAND_5GHZ];
}
/* Device driver core initialization */
int ath_init_device(u16 devid, struct ath_softc *sc, u16 subsysid,
const struct ath_bus_ops *bus_ops)
{
struct ieee80211_hw *hw = sc->hw;
struct ath_common *common;
struct ath_hw *ah;
int error = 0, i;
struct ath_regulatory *reg;
dev_dbg(sc->dev, "Attach ATH hw\n");
error = ath_init_softc(devid, sc, subsysid, bus_ops);
if (error != 0)
return error;
ah = sc->sc_ah;
common = ath9k_hw_common(ah);
/* get mac address from hardware and set in mac80211 */
SET_IEEE80211_PERM_ADDR(hw, common->macaddr);
ath_set_hw_capab(sc, hw);
error = ath_regd_init(&common->regulatory, sc->hw->wiphy,
ath9k_reg_notifier);
if (error)
return error;
reg = &common->regulatory;
if (ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
if (test_bit(ATH9K_MODE_11G, ah->caps.wireless_modes))
setup_ht_cap(sc,
&sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);
if (test_bit(ATH9K_MODE_11A, ah->caps.wireless_modes))
setup_ht_cap(sc,
&sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
}
/* initialize tx/rx engine */
error = ath_tx_init(sc, ATH_TXBUF);
if (error != 0)
goto error_attach;
error = ath_rx_init(sc, ATH_RXBUF);
if (error != 0)
goto error_attach;
INIT_WORK(&sc->chan_work, ath9k_wiphy_chan_work);
INIT_DELAYED_WORK(&sc->wiphy_work, ath9k_wiphy_work);
sc->wiphy_scheduler_int = msecs_to_jiffies(500);
error = ieee80211_register_hw(hw);
if (!ath_is_world_regd(reg)) {
error = regulatory_hint(hw->wiphy, reg->alpha2);
if (error)
goto error_attach;
}
/* Initialize LED control */
ath_init_leds(sc);
ath_start_rfkill_poll(sc);
return 0;
error_attach:
/* cleanup tx queues */
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
if (ATH_TXQ_SETUP(sc, i))
ath_tx_cleanupq(sc, &sc->tx.txq[i]);
ath9k_uninit_hw(sc);
return error;
}
int ath_reset(struct ath_softc *sc, bool retry_tx)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_hw *hw = sc->hw;
int r;
ath9k_hw_set_interrupts(ah, 0);
ath_drain_all_txq(sc, retry_tx);
ath_stoprecv(sc);
ath_flushrecv(sc);
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, sc->sc_ah->curchan, false);
if (r)
ath_print(common, ATH_DBG_FATAL,
"Unable to reset hardware; reset status %d\n", r);
spin_unlock_bh(&sc->sc_resetlock);
if (ath_startrecv(sc) != 0)
ath_print(common, ATH_DBG_FATAL,
"Unable to start recv logic\n");
/*
* 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_cache_conf_rate(sc, &hw->conf);
ath_update_txpow(sc);
if (sc->sc_flags & SC_OP_BEACONS)
ath_beacon_config(sc, NULL); /* restart beacons */
ath9k_hw_set_interrupts(ah, sc->imask);
if (retry_tx) {
int i;
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
if (ATH_TXQ_SETUP(sc, i)) {
spin_lock_bh(&sc->tx.txq[i].axq_lock);
ath_txq_schedule(sc, &sc->tx.txq[i]);
spin_unlock_bh(&sc->tx.txq[i].axq_lock);
}
}
}
return r;
}
/*
* 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_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_desc *ds;
struct ath_buf *bf;
int i, bsize, error;
ath_print(common, ATH_DBG_CONFIG, "%s DMA: %u buffers %u desc/buf\n",
name, nbuf, ndesc);
INIT_LIST_HEAD(head);
/* ath_desc must be a multiple of DWORDs */
if ((sizeof(struct ath_desc) % 4) != 0) {
ath_print(common, ATH_DBG_FATAL,
"ath_desc not DWORD aligned\n");
BUG_ON((sizeof(struct ath_desc) % 4) != 0);
error = -ENOMEM;
goto fail;
}
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->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 = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
&dd->dd_desc_paddr, GFP_KERNEL);
if (dd->dd_desc == NULL) {
error = -ENOMEM;
goto fail;
}
ds = dd->dd_desc;
ath_print(common, ATH_DBG_CONFIG, "%s DMA map: %p (%u) -> %llx (%u)\n",
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 = kzalloc(bsize, GFP_KERNEL);
if (bf == NULL) {
error = -ENOMEM;
goto fail2;
}
dd->dd_bufptr = bf;
for (i = 0; i < nbuf; i++, bf++, ds += ndesc) {
bf->bf_desc = ds;
bf->bf_daddr = DS2PHYS(dd, ds);
if (!(sc->sc_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)) {
BUG_ON((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:
dma_free_coherent(sc->dev, 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
}
void ath_descdma_cleanup(struct ath_softc *sc,
struct ath_descdma *dd,
struct list_head *head)
{
dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
dd->dd_desc_paddr);
INIT_LIST_HEAD(head);
kfree(dd->dd_bufptr);
memset(dd, 0, sizeof(*dd));
}
int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
{
int qnum;
switch (queue) {
case 0:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_VO];
break;
case 1:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_VI];
break;
case 2:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_BE];
break;
case 3:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_BK];
break;
default:
qnum = sc->tx.hwq_map[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;
}
/* XXX: Remove me once we don't depend on ath9k_channel for all
* this redundant data */
void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
struct ath9k_channel *ichan)
{
struct ieee80211_channel *chan = hw->conf.channel;
struct ieee80211_conf *conf = &hw->conf;
ichan->channel = chan->center_freq;
ichan->chan = chan;
if (chan->band == IEEE80211_BAND_2GHZ) {
ichan->chanmode = CHANNEL_G;
ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
} else {
ichan->chanmode = CHANNEL_A;
ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
}
if (conf_is_ht(conf))
ichan->chanmode = ath_get_extchanmode(sc, chan,
conf->channel_type);
}
/**********************/
/* mac80211 callbacks */
/**********************/
/*
* (Re)start btcoex timers
*/
static void ath9k_btcoex_timer_resume(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_hw *ah = sc->sc_ah;
ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
"Starting btcoex timers");
/* make sure duty cycle timer is also stopped when resuming */
if (btcoex->hw_timer_enabled)
ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
btcoex->bt_priority_cnt = 0;
btcoex->bt_priority_time = jiffies;
sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
mod_timer(&btcoex->period_timer, jiffies);
}
static int ath9k_start(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_channel *curchan = hw->conf.channel;
struct ath9k_channel *init_channel;
int r;
ath_print(common, ATH_DBG_CONFIG,
"Starting driver with initial channel: %d MHz\n",
curchan->center_freq);
mutex_lock(&sc->mutex);
if (ath9k_wiphy_started(sc)) {
if (sc->chan_idx == curchan->hw_value) {
/*
* Already on the operational channel, the new wiphy
* can be marked active.
*/
aphy->state = ATH_WIPHY_ACTIVE;
ieee80211_wake_queues(hw);
} else {
/*
* Another wiphy is on another channel, start the new
* wiphy in paused state.
*/
aphy->state = ATH_WIPHY_PAUSED;
ieee80211_stop_queues(hw);
}
mutex_unlock(&sc->mutex);
return 0;
}
aphy->state = ATH_WIPHY_ACTIVE;
/* setup initial channel */
sc->chan_idx = curchan->hw_value;
init_channel = ath_get_curchannel(sc, hw);
/* Reset SERDES registers */
ath9k_hw_configpcipowersave(ah, 0, 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);
r = ath9k_hw_reset(ah, init_channel, false);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to reset hardware; reset status %d "
"(freq %u MHz)\n", r,
curchan->center_freq);
spin_unlock_bh(&sc->sc_resetlock);
goto mutex_unlock;
}
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) {
ath_print(common, ATH_DBG_FATAL,
"Unable to start recv logic\n");
r = -EIO;
goto mutex_unlock;
}
/* Setup our intr mask. */
sc->imask = ATH9K_INT_RX | ATH9K_INT_TX
| ATH9K_INT_RXEOL | ATH9K_INT_RXORN
| ATH9K_INT_FATAL | ATH9K_INT_GLOBAL;
if (ah->caps.hw_caps & ATH9K_HW_CAP_GTT)
sc->imask |= ATH9K_INT_GTT;
if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
sc->imask |= ATH9K_INT_CST;
ath_cache_conf_rate(sc, &hw->conf);
sc->sc_flags &= ~SC_OP_INVALID;
/* Disable BMISS interrupt when we're not associated */
sc->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
ath9k_hw_set_interrupts(ah, sc->imask);
ieee80211_wake_queues(hw);
ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
!ah->btcoex_hw.enabled) {
ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
AR_STOMP_LOW_WLAN_WGHT);
ath9k_hw_btcoex_enable(ah);
if (common->bus_ops->bt_coex_prep)
common->bus_ops->bt_coex_prep(common);
if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
ath9k_btcoex_timer_resume(sc);
}
mutex_unlock:
mutex_unlock(&sc->mutex);
return r;
}
static int ath9k_tx(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_tx_control txctl;
int padpos, padsize;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
ath_print(common, ATH_DBG_XMIT,
"ath9k: %s: TX in unexpected wiphy state "
"%d\n", wiphy_name(hw->wiphy), aphy->state);
goto exit;
}
if (sc->ps_enabled) {
/*
* mac80211 does not set PM field for normal data frames, so we
* need to update that based on the current PS mode.
*/
if (ieee80211_is_data(hdr->frame_control) &&
!ieee80211_is_nullfunc(hdr->frame_control) &&
!ieee80211_has_pm(hdr->frame_control)) {
ath_print(common, ATH_DBG_PS, "Add PM=1 for a TX frame "
"while in PS mode\n");
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
}
}
if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) {
/*
* We are using PS-Poll and mac80211 can request TX while in
* power save mode. Need to wake up hardware for the TX to be
* completed and if needed, also for RX of buffered frames.
*/
ath9k_ps_wakeup(sc);
ath9k_hw_setrxabort(sc->sc_ah, 0);
if (ieee80211_is_pspoll(hdr->frame_control)) {
ath_print(common, ATH_DBG_PS,
"Sending PS-Poll to pick a buffered frame\n");
sc->sc_flags |= SC_OP_WAIT_FOR_PSPOLL_DATA;
} else {
ath_print(common, ATH_DBG_PS,
"Wake up to complete TX\n");
sc->sc_flags |= SC_OP_WAIT_FOR_TX_ACK;
}
/*
* The actual restore operation will happen only after
* the sc_flags bit is cleared. We are just dropping
* the ps_usecount here.
*/
ath9k_ps_restore(sc);
}
memset(&txctl, 0, sizeof(struct ath_tx_control));
/*
* As a temporary workaround, assign seq# here; this will likely need
* to be cleaned up to work better with Beacon transmission and virtual
* BSSes.
*/
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
sc->tx.seq_no += 0x10;
hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
}
/* Add the padding after the header if this is not already done */
padpos = ath9k_cmn_padpos(hdr->frame_control);
padsize = padpos & 3;
if (padsize && skb->len>padpos) {
if (skb_headroom(skb) < padsize)
return -1;
skb_push(skb, padsize);
memmove(skb->data, skb->data + padsize, padpos);
}
/* Check if a tx queue is available */
txctl.txq = ath_test_get_txq(sc, skb);
if (!txctl.txq)
goto exit;
ath_print(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
if (ath_tx_start(hw, skb, &txctl) != 0) {
ath_print(common, ATH_DBG_XMIT, "TX failed\n");
goto exit;
}
return 0;
exit:
dev_kfree_skb_any(skb);
return 0;
}
/*
* Pause btcoex timer and bt duty cycle timer
*/
static void ath9k_btcoex_timer_pause(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_hw *ah = sc->sc_ah;
del_timer_sync(&btcoex->period_timer);
if (btcoex->hw_timer_enabled)
ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
btcoex->hw_timer_enabled = false;
}
static void ath9k_stop(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
mutex_lock(&sc->mutex);
aphy->state = ATH_WIPHY_INACTIVE;
cancel_delayed_work_sync(&sc->ath_led_blink_work);
cancel_delayed_work_sync(&sc->tx_complete_work);
if (!sc->num_sec_wiphy) {
cancel_delayed_work_sync(&sc->wiphy_work);
cancel_work_sync(&sc->chan_work);
}
if (sc->sc_flags & SC_OP_INVALID) {
ath_print(common, ATH_DBG_ANY, "Device not present\n");
mutex_unlock(&sc->mutex);
return;
}
if (ath9k_wiphy_started(sc)) {
mutex_unlock(&sc->mutex);
return; /* another wiphy still in use */
}
if (ah->btcoex_hw.enabled) {
ath9k_hw_btcoex_disable(ah);
if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
ath9k_btcoex_timer_pause(sc);
}
/* 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_drain_all_txq(sc, false);
ath_stoprecv(sc);
ath9k_hw_phy_disable(ah);
} else
sc->rx.rxlink = NULL;
/* disable HAL and put h/w to sleep */
ath9k_hw_disable(ah);
ath9k_hw_configpcipowersave(ah, 1, 1);
ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
sc->sc_flags |= SC_OP_INVALID;
mutex_unlock(&sc->mutex);
ath_print(common, ATH_DBG_CONFIG, "Driver halt\n");
}
static int ath9k_add_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_vif *avp = (void *)conf->vif->drv_priv;
enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
int ret = 0;
mutex_lock(&sc->mutex);
if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) &&
sc->nvifs > 0) {
ret = -ENOBUFS;
goto out;
}
switch (conf->type) {
case NL80211_IFTYPE_STATION:
ic_opmode = NL80211_IFTYPE_STATION;
break;
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_MESH_POINT:
if (sc->nbcnvifs >= ATH_BCBUF) {
ret = -ENOBUFS;
goto out;
}
ic_opmode = conf->type;
break;
default:
ath_print(common, ATH_DBG_FATAL,
"Interface type %d not yet supported\n", conf->type);
ret = -EOPNOTSUPP;
goto out;
}
ath_print(common, ATH_DBG_CONFIG,
"Attach a VIF of type: %d\n", ic_opmode);
/* Set the VIF opmode */
avp->av_opmode = ic_opmode;
avp->av_bslot = -1;
sc->nvifs++;
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
ath9k_set_bssid_mask(hw);
if (sc->nvifs > 1)
goto out; /* skip global settings for secondary vif */
if (ic_opmode == NL80211_IFTYPE_AP) {
ath9k_hw_set_tsfadjust(sc->sc_ah, 1);
sc->sc_flags |= SC_OP_TSF_RESET;
}
/* Set the device opmode */
sc->sc_ah->opmode = ic_opmode;
/*
* Enable MIB interrupts when there are hardware phy counters.
* Note we only do this (at the moment) for station mode.
*/
if ((conf->type == NL80211_IFTYPE_STATION) ||
(conf->type == NL80211_IFTYPE_ADHOC) ||
(conf->type == NL80211_IFTYPE_MESH_POINT)) {
sc->imask |= ATH9K_INT_MIB;
sc->imask |= ATH9K_INT_TSFOOR;
}
ath9k_hw_set_interrupts(sc->sc_ah, sc->imask);
if (conf->type == NL80211_IFTYPE_AP ||
conf->type == NL80211_IFTYPE_ADHOC ||
conf->type == NL80211_IFTYPE_MONITOR)
ath_start_ani(common);
out:
mutex_unlock(&sc->mutex);
return ret;
}
static void ath9k_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_vif *avp = (void *)conf->vif->drv_priv;
int i;
ath_print(common, ATH_DBG_CONFIG, "Detach Interface\n");
mutex_lock(&sc->mutex);
/* Stop ANI */
del_timer_sync(&common->ani.timer);
/* Reclaim beacon resources */
if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
(sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
(sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
ath_beacon_return(sc, avp);
}
sc->sc_flags &= ~SC_OP_BEACONS;
for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
if (sc->beacon.bslot[i] == conf->vif) {
printk(KERN_DEBUG "%s: vif had allocated beacon "
"slot\n", __func__);
sc->beacon.bslot[i] = NULL;
sc->beacon.bslot_aphy[i] = NULL;
}
}
sc->nvifs--;
mutex_unlock(&sc->mutex);
}
static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_conf *conf = &hw->conf;
struct ath_hw *ah = sc->sc_ah;
bool disable_radio;
mutex_lock(&sc->mutex);
/*
* Leave this as the first check because we need to turn on the
* radio if it was disabled before prior to processing the rest
* of the changes. Likewise we must only disable the radio towards
* the end.
*/
if (changed & IEEE80211_CONF_CHANGE_IDLE) {
bool enable_radio;
bool all_wiphys_idle;
bool idle = !!(conf->flags & IEEE80211_CONF_IDLE);
spin_lock_bh(&sc->wiphy_lock);
all_wiphys_idle = ath9k_all_wiphys_idle(sc);
ath9k_set_wiphy_idle(aphy, idle);
if (!idle && all_wiphys_idle)
enable_radio = true;
/*
* After we unlock here its possible another wiphy
* can be re-renabled so to account for that we will
* only disable the radio toward the end of this routine
* if by then all wiphys are still idle.
*/
spin_unlock_bh(&sc->wiphy_lock);
if (enable_radio) {
ath_radio_enable(sc, hw);
ath_print(common, ATH_DBG_CONFIG,
"not-idle: enabling radio\n");
}
}
/*
* We just prepare to enable PS. We have to wait until our AP has
* ACK'd our null data frame to disable RX otherwise we'll ignore
* those ACKs and end up retransmitting the same null data frames.
* IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
*/
if (changed & IEEE80211_CONF_CHANGE_PS) {
if (conf->flags & IEEE80211_CONF_PS) {
sc->sc_flags |= SC_OP_PS_ENABLED;
if (!(ah->caps.hw_caps &
ATH9K_HW_CAP_AUTOSLEEP)) {
if ((sc->imask & ATH9K_INT_TIM_TIMER) == 0) {
sc->imask |= ATH9K_INT_TIM_TIMER;
ath9k_hw_set_interrupts(sc->sc_ah,
sc->imask);
}
}
/*
* At this point we know hardware has received an ACK
* of a previously sent null data frame.
*/
if ((sc->sc_flags & SC_OP_NULLFUNC_COMPLETED)) {
sc->sc_flags &= ~SC_OP_NULLFUNC_COMPLETED;
sc->ps_enabled = true;
ath9k_hw_setrxabort(sc->sc_ah, 1);
}
} else {
sc->ps_enabled = false;
sc->sc_flags &= ~(SC_OP_PS_ENABLED |
SC_OP_NULLFUNC_COMPLETED);
ath9k_setpower(sc, ATH9K_PM_AWAKE);
if (!(ah->caps.hw_caps &
ATH9K_HW_CAP_AUTOSLEEP)) {
ath9k_hw_setrxabort(sc->sc_ah, 0);
sc->sc_flags &= ~(SC_OP_WAIT_FOR_BEACON |
SC_OP_WAIT_FOR_CAB |
SC_OP_WAIT_FOR_PSPOLL_DATA |
SC_OP_WAIT_FOR_TX_ACK);
if (sc->imask & ATH9K_INT_TIM_TIMER) {
sc->imask &= ~ATH9K_INT_TIM_TIMER;
ath9k_hw_set_interrupts(sc->sc_ah,
sc->imask);
}
}
}
}
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
struct ieee80211_channel *curchan = hw->conf.channel;
int pos = curchan->hw_value;
aphy->chan_idx = pos;
aphy->chan_is_ht = conf_is_ht(conf);
if (aphy->state == ATH_WIPHY_SCAN ||
aphy->state == ATH_WIPHY_ACTIVE)
ath9k_wiphy_pause_all_forced(sc, aphy);
else {
/*
* Do not change operational channel based on a paused
* wiphy changes.
*/
goto skip_chan_change;
}
ath_print(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
curchan->center_freq);
/* XXX: remove me eventualy */
ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
ath_update_chainmask(sc, conf_is_ht(conf));
if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to set channel\n");
mutex_unlock(&sc->mutex);
return -EINVAL;
}
}
skip_chan_change:
if (changed & IEEE80211_CONF_CHANGE_POWER)
sc->config.txpowlimit = 2 * conf->power_level;
spin_lock_bh(&sc->wiphy_lock);
disable_radio = ath9k_all_wiphys_idle(sc);
spin_unlock_bh(&sc->wiphy_lock);
if (disable_radio) {
ath_print(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
ath_radio_disable(sc, hw);
}
mutex_unlock(&sc->mutex);
return 0;
}
#define SUPPORTED_FILTERS \
(FIF_PROMISC_IN_BSS | \
FIF_ALLMULTI | \
FIF_CONTROL | \
FIF_PSPOLL | \
FIF_OTHER_BSS | \
FIF_BCN_PRBRESP_PROMISC | \
FIF_FCSFAIL)
/* FIXME: sc->sc_full_reset ? */
static void ath9k_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
u64 multicast)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
u32 rfilt;
changed_flags &= SUPPORTED_FILTERS;
*total_flags &= SUPPORTED_FILTERS;
sc->rx.rxfilter = *total_flags;
ath9k_ps_wakeup(sc);
rfilt = ath_calcrxfilter(sc);
ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
ath9k_ps_restore(sc);
ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
"Set HW RX filter: 0x%x\n", rfilt);
}
static void ath9k_sta_notify(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum sta_notify_cmd cmd,
struct ieee80211_sta *sta)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
switch (cmd) {
case STA_NOTIFY_ADD:
ath_node_attach(sc, sta);
break;
case STA_NOTIFY_REMOVE:
ath_node_detach(sc, sta);
break;
default:
break;
}
}
static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath9k_tx_queue_info qi;
int ret = 0, qnum;
if (queue >= WME_NUM_AC)
return 0;
mutex_lock(&sc->mutex);
memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
qi.tqi_aifs = params->aifs;
qi.tqi_cwmin = params->cw_min;
qi.tqi_cwmax = params->cw_max;
qi.tqi_burstTime = params->txop;
qnum = ath_get_hal_qnum(queue, sc);
ath_print(common, ATH_DBG_CONFIG,
"Configure tx [queue/halq] [%d/%d], "
"aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
queue, qnum, params->aifs, params->cw_min,
params->cw_max, params->txop);
ret = ath_txq_update(sc, qnum, &qi);
if (ret)
ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
if ((qnum == sc->tx.hwq_map[ATH9K_WME_AC_BE]) && !ret)
ath_beaconq_config(sc);
mutex_unlock(&sc->mutex);
return ret;
}
static int ath9k_set_key(struct ieee80211_hw *hw,
enum set_key_cmd cmd,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
int ret = 0;
if (modparam_nohwcrypt)
return -ENOSPC;
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
ath_print(common, ATH_DBG_CONFIG, "Set HW Key\n");
switch (cmd) {
case SET_KEY:
ret = ath_key_config(common, vif, sta, key);
if (ret >= 0) {
key->hw_key_idx = ret;
/* push IV and Michael MIC generation to stack */
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
if (key->alg == ALG_TKIP)
key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
if (sc->sc_ah->sw_mgmt_crypto && key->alg == ALG_CCMP)
key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
ret = 0;
}
break;
case DISABLE_KEY:
ath_key_delete(common, key);
break;
default:
ret = -EINVAL;
}
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
return ret;
}
static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_vif *avp = (void *)vif->drv_priv;
int error;
mutex_lock(&sc->mutex);
if (changed & BSS_CHANGED_BSSID) {
/* Set BSSID */
memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
common->curaid = 0;
ath9k_hw_write_associd(ah);
/* Set aggregation protection mode parameters */
sc->config.ath_aggr_prot = 0;
/* Only legacy IBSS for now */
if (vif->type == NL80211_IFTYPE_ADHOC)
ath_update_chainmask(sc, 0);
ath_print(common, ATH_DBG_CONFIG,
"BSSID: %pM aid: 0x%x\n",
common->curbssid, common->curaid);
/* need to reconfigure the beacon */
sc->sc_flags &= ~SC_OP_BEACONS ;
}
/* Enable transmission of beacons (AP, IBSS, MESH) */
if ((changed & BSS_CHANGED_BEACON) ||
((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
error = ath_beacon_alloc(aphy, vif);
if (!error)
ath_beacon_config(sc, vif);
}
/* Disable transmission of beacons */
if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
if (changed & BSS_CHANGED_BEACON_INT) {
sc->beacon_interval = bss_conf->beacon_int;
/*
* In case of AP mode, the HW TSF has to be reset
* when the beacon interval changes.
*/
if (vif->type == NL80211_IFTYPE_AP) {
sc->sc_flags |= SC_OP_TSF_RESET;
ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
error = ath_beacon_alloc(aphy, vif);
if (!error)
ath_beacon_config(sc, vif);
} else {
ath_beacon_config(sc, vif);
}
}
if (changed & BSS_CHANGED_ERP_PREAMBLE) {
ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
bss_conf->use_short_preamble);
if (bss_conf->use_short_preamble)
sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
else
sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
}
if (changed & BSS_CHANGED_ERP_CTS_PROT) {
ath_print(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
bss_conf->use_cts_prot);
if (bss_conf->use_cts_prot &&
hw->conf.channel->band != IEEE80211_BAND_5GHZ)
sc->sc_flags |= SC_OP_PROTECT_ENABLE;
else
sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
}
if (changed & BSS_CHANGED_ASSOC) {
ath_print(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
bss_conf->assoc);
ath9k_bss_assoc_info(sc, vif, bss_conf);
}
mutex_unlock(&sc->mutex);
}
static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
{
u64 tsf;
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
mutex_lock(&sc->mutex);
tsf = ath9k_hw_gettsf64(sc->sc_ah);
mutex_unlock(&sc->mutex);
return tsf;
}
static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
mutex_lock(&sc->mutex);
ath9k_hw_settsf64(sc->sc_ah, tsf);
mutex_unlock(&sc->mutex);
}
static void ath9k_reset_tsf(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
ath9k_hw_reset_tsf(sc->sc_ah);
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
}
static int ath9k_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum ieee80211_ampdu_mlme_action action,
struct ieee80211_sta *sta,
u16 tid, u16 *ssn)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
int ret = 0;
switch (action) {
case IEEE80211_AMPDU_RX_START:
if (!(sc->sc_flags & SC_OP_RXAGGR))
ret = -ENOTSUPP;
break;
case IEEE80211_AMPDU_RX_STOP:
break;
case IEEE80211_AMPDU_TX_START:
ath_tx_aggr_start(sc, sta, tid, ssn);
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
break;
case IEEE80211_AMPDU_TX_STOP:
ath_tx_aggr_stop(sc, sta, tid);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
ath_tx_aggr_resume(sc, sta, tid);
break;
default:
ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
"Unknown AMPDU action\n");
}
return ret;
}
static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
mutex_lock(&sc->mutex);
if (ath9k_wiphy_scanning(sc)) {
printk(KERN_DEBUG "ath9k: Two wiphys trying to scan at the "
"same time\n");
/*
* Do not allow the concurrent scanning state for now. This
* could be improved with scanning control moved into ath9k.
*/
mutex_unlock(&sc->mutex);
return;
}
aphy->state = ATH_WIPHY_SCAN;
ath9k_wiphy_pause_all_forced(sc, aphy);
sc->sc_flags |= SC_OP_SCANNING;
del_timer_sync(&common->ani.timer);
mutex_unlock(&sc->mutex);
}
static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
mutex_lock(&sc->mutex);
aphy->state = ATH_WIPHY_ACTIVE;
sc->sc_flags &= ~SC_OP_SCANNING;
sc->sc_flags |= SC_OP_FULL_RESET;
ath_start_ani(common);
ath_beacon_config(sc, NULL);
mutex_unlock(&sc->mutex);
}
struct ieee80211_ops ath9k_ops = {
.tx = ath9k_tx,
.start = ath9k_start,
.stop = ath9k_stop,
.add_interface = ath9k_add_interface,
.remove_interface = ath9k_remove_interface,
.config = ath9k_config,
.configure_filter = ath9k_configure_filter,
.sta_notify = ath9k_sta_notify,
.conf_tx = ath9k_conf_tx,
.bss_info_changed = ath9k_bss_info_changed,
.set_key = ath9k_set_key,
.get_tsf = ath9k_get_tsf,
.set_tsf = ath9k_set_tsf,
.reset_tsf = ath9k_reset_tsf,
.ampdu_action = ath9k_ampdu_action,
.sw_scan_start = ath9k_sw_scan_start,
.sw_scan_complete = ath9k_sw_scan_complete,
.rfkill_poll = ath9k_rfkill_poll_state,
};
static int __init ath9k_init(void)
{
int error;
/* Register rate control algorithm */
error = ath_rate_control_register();
if (error != 0) {
printk(KERN_ERR
"ath9k: Unable to register rate control "
"algorithm: %d\n",
error);
goto err_out;
}
error = ath9k_debug_create_root();
if (error) {
printk(KERN_ERR
"ath9k: Unable to create debugfs root: %d\n",
error);
goto err_rate_unregister;
}
error = ath_pci_init();
if (error < 0) {
printk(KERN_ERR
"ath9k: No PCI devices found, driver not installed.\n");
error = -ENODEV;
goto err_remove_root;
}
error = ath_ahb_init();
if (error < 0) {
error = -ENODEV;
goto err_pci_exit;
}
return 0;
err_pci_exit:
ath_pci_exit();
err_remove_root:
ath9k_debug_remove_root();
err_rate_unregister:
ath_rate_control_unregister();
err_out:
return error;
}
module_init(ath9k_init);
static void __exit ath9k_exit(void)
{
ath_ahb_exit();
ath_pci_exit();
ath9k_debug_remove_root();
ath_rate_control_unregister();
printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
}
module_exit(ath9k_exit);