2 * Copyright (c) 2008 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 /* mac80211 and PCI callbacks */
19 #include <linux/nl80211.h>
22 #define ATH_PCI_VERSION "0.1"
24 #define IEEE80211_HTCAP_MAXRXAMPDU_FACTOR 13
25 #define IEEE80211_ACTION_CAT_HT 7
26 #define IEEE80211_ACTION_HT_TXCHWIDTH 0
28 static char *dev_info = "ath9k";
30 MODULE_AUTHOR("Atheros Communications");
31 MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
32 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
33 MODULE_LICENSE("Dual BSD/GPL");
35 static struct pci_device_id ath_pci_id_table[] __devinitdata = {
36 { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI */
37 { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
38 { PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI */
39 { PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI */
40 { PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
44 static int ath_get_channel(struct ath_softc *sc,
45 struct ieee80211_channel *chan)
49 for (i = 0; i < sc->sc_ah->ah_nchan; i++) {
50 if (sc->sc_ah->ah_channels[i].channel == chan->center_freq)
57 static u32 ath_get_extchanmode(struct ath_softc *sc,
58 struct ieee80211_channel *chan)
61 u8 ext_chan_offset = sc->sc_ht_info.ext_chan_offset;
62 enum ath9k_ht_macmode tx_chan_width = sc->sc_ht_info.tx_chan_width;
65 case IEEE80211_BAND_2GHZ:
66 if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_NONE) &&
67 (tx_chan_width == ATH9K_HT_MACMODE_20))
68 chanmode = CHANNEL_G_HT20;
69 if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_ABOVE) &&
70 (tx_chan_width == ATH9K_HT_MACMODE_2040))
71 chanmode = CHANNEL_G_HT40PLUS;
72 if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_BELOW) &&
73 (tx_chan_width == ATH9K_HT_MACMODE_2040))
74 chanmode = CHANNEL_G_HT40MINUS;
76 case IEEE80211_BAND_5GHZ:
77 if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_NONE) &&
78 (tx_chan_width == ATH9K_HT_MACMODE_20))
79 chanmode = CHANNEL_A_HT20;
80 if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_ABOVE) &&
81 (tx_chan_width == ATH9K_HT_MACMODE_2040))
82 chanmode = CHANNEL_A_HT40PLUS;
83 if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_BELOW) &&
84 (tx_chan_width == ATH9K_HT_MACMODE_2040))
85 chanmode = CHANNEL_A_HT40MINUS;
95 static int ath_setkey_tkip(struct ath_softc *sc,
96 struct ieee80211_key_conf *key,
97 struct ath9k_keyval *hk,
100 u8 *key_rxmic = NULL;
101 u8 *key_txmic = NULL;
103 key_txmic = key->key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
104 key_rxmic = key->key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
107 /* Group key installation */
108 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
109 return ath_keyset(sc, key->keyidx, hk, addr);
111 if (!sc->sc_splitmic) {
113 * data key goes at first index,
114 * the hal handles the MIC keys at index+64.
116 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
117 memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
118 return ath_keyset(sc, key->keyidx, hk, addr);
121 * TX key goes at first index, RX key at +32.
122 * The hal handles the MIC keys at index+64.
124 memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
125 if (!ath_keyset(sc, key->keyidx, hk, NULL)) {
126 /* Txmic entry failed. No need to proceed further */
127 DPRINTF(sc, ATH_DBG_KEYCACHE,
128 "%s Setting TX MIC Key Failed\n", __func__);
132 memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
133 /* XXX delete tx key on failure? */
134 return ath_keyset(sc, key->keyidx+32, hk, addr);
137 static int ath_key_config(struct ath_softc *sc,
139 struct ieee80211_key_conf *key)
141 struct ieee80211_vif *vif;
142 struct ath9k_keyval hk;
143 const u8 *mac = NULL;
145 enum ieee80211_if_types opmode;
147 memset(&hk, 0, sizeof(hk));
151 hk.kv_type = ATH9K_CIPHER_WEP;
154 hk.kv_type = ATH9K_CIPHER_TKIP;
157 hk.kv_type = ATH9K_CIPHER_AES_CCM;
163 hk.kv_len = key->keylen;
164 memcpy(hk.kv_val, key->key, key->keylen);
169 vif = sc->sc_vaps[0]->av_if_data;
174 * For _M_STA mc tx, we will not setup a key at all since we never
176 * _M_STA mc rx, we will use the keyID.
177 * for _M_IBSS mc tx, we will use the keyID, and no macaddr.
178 * for _M_IBSS mc rx, we will alloc a slot and plumb the mac of the
179 * peer node. BUT we will plumb a cleartext key so that we can do
180 * perSta default key table lookup in software.
182 if (is_broadcast_ether_addr(addr)) {
184 case IEEE80211_IF_TYPE_STA:
185 /* default key: could be group WPA key
186 * or could be static WEP key */
189 case IEEE80211_IF_TYPE_IBSS:
191 case IEEE80211_IF_TYPE_AP:
201 if (key->alg == ALG_TKIP)
202 ret = ath_setkey_tkip(sc, key, &hk, mac);
204 ret = ath_keyset(sc, key->keyidx, &hk, mac);
209 sc->sc_keytype = hk.kv_type;
213 static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key)
215 #define ATH_MAX_NUM_KEYS 4
218 freeslot = (key->keyidx >= ATH_MAX_NUM_KEYS) ? 1 : 0;
219 ath_key_reset(sc, key->keyidx, freeslot);
220 #undef ATH_MAX_NUM_KEYS
223 static void setup_ht_cap(struct ieee80211_ht_info *ht_info)
225 /* Until mac80211 includes these fields */
227 #define IEEE80211_HT_CAP_DSSSCCK40 0x1000
228 #define IEEE80211_HT_CAP_MAXRXAMPDU_65536 0x3 /* 2 ^ 16 */
229 #define IEEE80211_HT_CAP_MPDUDENSITY_8 0x6 /* 8 usec */
231 ht_info->ht_supported = 1;
232 ht_info->cap = (u16)IEEE80211_HT_CAP_SUP_WIDTH
233 |(u16)IEEE80211_HT_CAP_MIMO_PS
234 |(u16)IEEE80211_HT_CAP_SGI_40
235 |(u16)IEEE80211_HT_CAP_DSSSCCK40;
237 ht_info->ampdu_factor = IEEE80211_HT_CAP_MAXRXAMPDU_65536;
238 ht_info->ampdu_density = IEEE80211_HT_CAP_MPDUDENSITY_8;
239 /* setup supported mcs set */
240 memset(ht_info->supp_mcs_set, 0, 16);
241 ht_info->supp_mcs_set[0] = 0xff;
242 ht_info->supp_mcs_set[1] = 0xff;
243 ht_info->supp_mcs_set[12] = IEEE80211_HT_CAP_MCS_TX_DEFINED;
246 static int ath_rate2idx(struct ath_softc *sc, int rate)
248 int i = 0, cur_band, n_rates;
249 struct ieee80211_hw *hw = sc->hw;
251 cur_band = hw->conf.channel->band;
252 n_rates = sc->sbands[cur_band].n_bitrates;
254 for (i = 0; i < n_rates; i++) {
255 if (sc->sbands[cur_band].bitrates[i].bitrate == rate)
260 * NB:mac80211 validates rx rate index against the supported legacy rate
261 * index only (should be done against ht rates also), return the highest
262 * legacy rate index for rx rate which does not match any one of the
263 * supported basic and extended rates to make mac80211 happy.
264 * The following hack will be cleaned up once the issue with
265 * the rx rate index validation in mac80211 is fixed.
272 static void ath9k_rx_prepare(struct ath_softc *sc,
274 struct ath_recv_status *status,
275 struct ieee80211_rx_status *rx_status)
277 struct ieee80211_hw *hw = sc->hw;
278 struct ieee80211_channel *curchan = hw->conf.channel;
280 memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
282 rx_status->mactime = status->tsf;
283 rx_status->band = curchan->band;
284 rx_status->freq = curchan->center_freq;
285 rx_status->noise = ATH_DEFAULT_NOISE_FLOOR;
286 rx_status->signal = rx_status->noise + status->rssi;
287 rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100));
288 rx_status->antenna = status->antenna;
289 rx_status->qual = status->rssi * 100 / 64;
291 if (status->flags & ATH_RX_MIC_ERROR)
292 rx_status->flag |= RX_FLAG_MMIC_ERROR;
293 if (status->flags & ATH_RX_FCS_ERROR)
294 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
296 rx_status->flag |= RX_FLAG_TSFT;
299 static u8 parse_mpdudensity(u8 mpdudensity)
302 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
303 * 0 for no restriction
312 switch (mpdudensity) {
318 /* Our lower layer calculations limit our precision to
334 static int ath9k_start(struct ieee80211_hw *hw)
336 struct ath_softc *sc = hw->priv;
337 struct ieee80211_channel *curchan = hw->conf.channel;
340 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with "
341 "initial channel: %d MHz\n", __func__, curchan->center_freq);
343 /* setup initial channel */
345 pos = ath_get_channel(sc, curchan);
347 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
351 sc->sc_ah->ah_channels[pos].chanmode =
352 (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;
355 error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);
357 DPRINTF(sc, ATH_DBG_FATAL,
358 "%s: Unable to complete ath_open\n", __func__);
362 ieee80211_wake_queues(hw);
366 static int ath9k_tx(struct ieee80211_hw *hw,
369 struct ath_softc *sc = hw->priv;
372 /* Add the padding after the header if this is not already done */
373 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
375 padsize = hdrlen % 4;
376 if (skb_headroom(skb) < padsize)
378 skb_push(skb, padsize);
379 memmove(skb->data, skb->data + padsize, hdrlen);
382 DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
386 if (ath_tx_start(sc, skb) != 0) {
387 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
388 dev_kfree_skb_any(skb);
389 /* FIXME: Check for proper return value from ATH_DEV */
396 static void ath9k_stop(struct ieee80211_hw *hw)
398 struct ath_softc *sc = hw->priv;
401 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);
403 error = ath_suspend(sc);
405 DPRINTF(sc, ATH_DBG_CONFIG,
406 "%s: Device is no longer present\n", __func__);
408 ieee80211_stop_queues(hw);
411 static int ath9k_add_interface(struct ieee80211_hw *hw,
412 struct ieee80211_if_init_conf *conf)
414 struct ath_softc *sc = hw->priv;
415 int error, ic_opmode = 0;
417 /* Support only vap for now */
422 switch (conf->type) {
423 case IEEE80211_IF_TYPE_STA:
424 ic_opmode = ATH9K_M_STA;
426 case IEEE80211_IF_TYPE_IBSS:
427 ic_opmode = ATH9K_M_IBSS;
430 DPRINTF(sc, ATH_DBG_FATAL,
431 "%s: Only STA and IBSS are supported currently\n",
436 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n",
440 error = ath_vap_attach(sc, 0, conf->vif, ic_opmode);
442 DPRINTF(sc, ATH_DBG_FATAL,
443 "%s: Unable to attach vap, error: %d\n",
451 static void ath9k_remove_interface(struct ieee80211_hw *hw,
452 struct ieee80211_if_init_conf *conf)
454 struct ath_softc *sc = hw->priv;
458 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__);
460 avp = sc->sc_vaps[0];
462 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
467 #ifdef CONFIG_SLOW_ANT_DIV
468 ath_slow_ant_div_stop(&sc->sc_antdiv);
471 /* Update ratectrl */
472 ath_rate_newstate(sc, avp);
474 /* Reclaim beacon resources */
475 if (sc->sc_opmode == ATH9K_M_HOSTAP || sc->sc_opmode == ATH9K_M_IBSS) {
476 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
477 ath_beacon_return(sc, avp);
480 /* Set interrupt mask */
481 sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
482 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask & ~ATH9K_INT_GLOBAL);
485 error = ath_vap_detach(sc, 0);
487 DPRINTF(sc, ATH_DBG_FATAL,
488 "%s: Unable to detach vap, error: %d\n",
492 static int ath9k_config(struct ieee80211_hw *hw,
493 struct ieee80211_conf *conf)
495 struct ath_softc *sc = hw->priv;
496 struct ieee80211_channel *curchan = hw->conf.channel;
499 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
501 curchan->center_freq);
503 pos = ath_get_channel(sc, curchan);
505 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
509 sc->sc_ah->ah_channels[pos].chanmode =
510 (curchan->band == IEEE80211_BAND_2GHZ) ?
511 CHANNEL_G : CHANNEL_A;
513 if (sc->sc_curaid && hw->conf.ht_conf.ht_supported)
514 sc->sc_ah->ah_channels[pos].chanmode =
515 ath_get_extchanmode(sc, curchan);
517 sc->sc_config.txpowlimit = 2 * conf->power_level;
519 /* set h/w channel */
520 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
521 DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n",
527 static int ath9k_config_interface(struct ieee80211_hw *hw,
528 struct ieee80211_vif *vif,
529 struct ieee80211_if_conf *conf)
531 struct ath_softc *sc = hw->priv;
535 DECLARE_MAC_BUF(mac);
537 avp = sc->sc_vaps[0];
539 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
544 if ((conf->changed & IEEE80211_IFCC_BSSID) &&
545 !is_zero_ether_addr(conf->bssid)) {
547 case IEEE80211_IF_TYPE_STA:
548 case IEEE80211_IF_TYPE_IBSS:
549 /* Update ratectrl about the new state */
550 ath_rate_newstate(sc, avp);
553 memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
555 ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
558 /* Set aggregation protection mode parameters */
559 sc->sc_config.ath_aggr_prot = 0;
562 * Reset our TSF so that its value is lower than the
563 * beacon that we are trying to catch.
564 * Only then hw will update its TSF register with the
565 * new beacon. Reset the TSF before setting the BSSID
566 * to avoid allowing in any frames that would update
567 * our TSF only to have us clear it
568 * immediately thereafter.
570 ath9k_hw_reset_tsf(sc->sc_ah);
572 /* Disable BMISS interrupt when we're not associated */
573 ath9k_hw_set_interrupts(sc->sc_ah,
575 ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS));
576 sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
578 DPRINTF(sc, ATH_DBG_CONFIG,
579 "%s: RX filter 0x%x bssid %s aid 0x%x\n",
581 print_mac(mac, sc->sc_curbssid), sc->sc_curaid);
583 /* need to reconfigure the beacon */
592 if ((conf->changed & IEEE80211_IFCC_BEACON) &&
593 (vif->type == IEEE80211_IF_TYPE_IBSS)) {
595 * Allocate and setup the beacon frame.
597 * Stop any previous beacon DMA. This may be
598 * necessary, for example, when an ibss merge
599 * causes reconfiguration; we may be called
600 * with beacon transmission active.
602 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
604 error = ath_beacon_alloc(sc, 0);
608 ath_beacon_sync(sc, 0);
611 /* Check for WLAN_CAPABILITY_PRIVACY ? */
612 if ((avp->av_opmode != IEEE80211_IF_TYPE_STA)) {
613 for (i = 0; i < IEEE80211_WEP_NKID; i++)
614 if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
615 ath9k_hw_keysetmac(sc->sc_ah,
620 /* Only legacy IBSS for now */
621 if (vif->type == IEEE80211_IF_TYPE_IBSS)
622 ath_update_chainmask(sc, 0);
627 #define SUPPORTED_FILTERS \
628 (FIF_PROMISC_IN_BSS | \
632 FIF_BCN_PRBRESP_PROMISC | \
635 /* FIXME: sc->sc_full_reset ? */
636 static void ath9k_configure_filter(struct ieee80211_hw *hw,
637 unsigned int changed_flags,
638 unsigned int *total_flags,
640 struct dev_mc_list *mclist)
642 struct ath_softc *sc = hw->priv;
645 changed_flags &= SUPPORTED_FILTERS;
646 *total_flags &= SUPPORTED_FILTERS;
648 sc->rx_filter = *total_flags;
649 rfilt = ath_calcrxfilter(sc);
650 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
652 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
653 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
654 ath9k_hw_write_associd(sc->sc_ah, ath_bcast_mac, 0);
657 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set HW RX filter: 0x%x\n",
658 __func__, sc->rx_filter);
661 static void ath9k_sta_notify(struct ieee80211_hw *hw,
662 struct ieee80211_vif *vif,
663 enum sta_notify_cmd cmd,
666 struct ath_softc *sc = hw->priv;
669 DECLARE_MAC_BUF(mac);
671 spin_lock_irqsave(&sc->node_lock, flags);
672 an = ath_node_find(sc, (u8 *) addr);
673 spin_unlock_irqrestore(&sc->node_lock, flags);
677 spin_lock_irqsave(&sc->node_lock, flags);
679 ath_node_attach(sc, (u8 *)addr, 0);
680 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a node: %s\n",
682 print_mac(mac, addr));
684 ath_node_get(sc, (u8 *)addr);
686 spin_unlock_irqrestore(&sc->node_lock, flags);
688 case STA_NOTIFY_REMOVE:
690 DPRINTF(sc, ATH_DBG_FATAL,
691 "%s: Removal of a non-existent node\n",
694 ath_node_put(sc, an, ATH9K_BH_STATUS_INTACT);
695 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Put a node: %s\n",
697 print_mac(mac, addr));
705 static int ath9k_conf_tx(struct ieee80211_hw *hw,
707 const struct ieee80211_tx_queue_params *params)
709 struct ath_softc *sc = hw->priv;
710 struct ath9k_tx_queue_info qi;
713 if (queue >= WME_NUM_AC)
716 qi.tqi_aifs = params->aifs;
717 qi.tqi_cwmin = params->cw_min;
718 qi.tqi_cwmax = params->cw_max;
719 qi.tqi_burstTime = params->txop;
720 qnum = ath_get_hal_qnum(queue, sc);
722 DPRINTF(sc, ATH_DBG_CONFIG,
723 "%s: Configure tx [queue/halq] [%d/%d], "
724 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
733 ret = ath_txq_update(sc, qnum, &qi);
735 DPRINTF(sc, ATH_DBG_FATAL,
736 "%s: TXQ Update failed\n", __func__);
741 static int ath9k_set_key(struct ieee80211_hw *hw,
742 enum set_key_cmd cmd,
743 const u8 *local_addr,
745 struct ieee80211_key_conf *key)
747 struct ath_softc *sc = hw->priv;
750 DPRINTF(sc, ATH_DBG_KEYCACHE, " %s: Set HW Key\n", __func__);
754 ret = ath_key_config(sc, addr, key);
756 set_bit(key->keyidx, sc->sc_keymap);
757 key->hw_key_idx = key->keyidx;
758 /* push IV and Michael MIC generation to stack */
759 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
760 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
764 ath_key_delete(sc, key);
765 clear_bit(key->keyidx, sc->sc_keymap);
766 sc->sc_keytype = ATH9K_CIPHER_CLR;
775 static void ath9k_ht_conf(struct ath_softc *sc,
776 struct ieee80211_bss_conf *bss_conf)
778 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT BIT(14)
779 struct ath_ht_info *ht_info = &sc->sc_ht_info;
781 if (bss_conf->assoc_ht) {
782 ht_info->ext_chan_offset =
783 bss_conf->ht_bss_conf->bss_cap &
784 IEEE80211_HT_IE_CHA_SEC_OFFSET;
786 if (!(bss_conf->ht_conf->cap &
787 IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
788 (bss_conf->ht_bss_conf->bss_cap &
789 IEEE80211_HT_IE_CHA_WIDTH))
790 ht_info->tx_chan_width = ATH9K_HT_MACMODE_2040;
792 ht_info->tx_chan_width = ATH9K_HT_MACMODE_20;
794 ath9k_hw_set11nmac2040(sc->sc_ah, ht_info->tx_chan_width);
795 ht_info->maxampdu = 1 << (IEEE80211_HTCAP_MAXRXAMPDU_FACTOR +
796 bss_conf->ht_conf->ampdu_factor);
797 ht_info->mpdudensity =
798 parse_mpdudensity(bss_conf->ht_conf->ampdu_density);
802 #undef IEEE80211_HT_CAP_40MHZ_INTOLERANT
805 static void ath9k_bss_assoc_info(struct ath_softc *sc,
806 struct ieee80211_bss_conf *bss_conf)
808 struct ieee80211_hw *hw = sc->hw;
809 struct ieee80211_channel *curchan = hw->conf.channel;
812 DECLARE_MAC_BUF(mac);
814 if (bss_conf->assoc) {
815 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n",
819 avp = sc->sc_vaps[0];
821 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
826 /* New association, store aid */
827 if (avp->av_opmode == ATH9K_M_STA) {
828 sc->sc_curaid = bss_conf->aid;
829 ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
833 /* Configure the beacon */
834 ath_beacon_config(sc, 0);
837 /* Reset rssi stats */
838 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
839 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
840 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
841 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
843 /* Update chainmask */
844 ath_update_chainmask(sc, bss_conf->assoc_ht);
846 DPRINTF(sc, ATH_DBG_CONFIG,
847 "%s: bssid %s aid 0x%x\n",
849 print_mac(mac, sc->sc_curbssid), sc->sc_curaid);
851 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
853 curchan->center_freq);
855 pos = ath_get_channel(sc, curchan);
857 DPRINTF(sc, ATH_DBG_FATAL,
858 "%s: Invalid channel\n", __func__);
862 if (hw->conf.ht_conf.ht_supported)
863 sc->sc_ah->ah_channels[pos].chanmode =
864 ath_get_extchanmode(sc, curchan);
866 sc->sc_ah->ah_channels[pos].chanmode =
867 (curchan->band == IEEE80211_BAND_2GHZ) ?
868 CHANNEL_G : CHANNEL_A;
870 /* set h/w channel */
871 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
872 DPRINTF(sc, ATH_DBG_FATAL,
873 "%s: Unable to set channel\n",
876 ath_rate_newstate(sc, avp);
877 /* Update ratectrl about the new state */
878 ath_rc_node_update(hw, avp->rc_node);
880 DPRINTF(sc, ATH_DBG_CONFIG,
881 "%s: Bss Info DISSOC\n", __func__);
886 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
887 struct ieee80211_vif *vif,
888 struct ieee80211_bss_conf *bss_conf,
891 struct ath_softc *sc = hw->priv;
893 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
894 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n",
896 bss_conf->use_short_preamble);
897 if (bss_conf->use_short_preamble)
898 sc->sc_flags |= ATH_PREAMBLE_SHORT;
900 sc->sc_flags &= ~ATH_PREAMBLE_SHORT;
903 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
904 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n",
906 bss_conf->use_cts_prot);
907 if (bss_conf->use_cts_prot &&
908 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
909 sc->sc_flags |= ATH_PROTECT_ENABLE;
911 sc->sc_flags &= ~ATH_PROTECT_ENABLE;
914 if (changed & BSS_CHANGED_HT) {
915 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT %d\n",
918 ath9k_ht_conf(sc, bss_conf);
921 if (changed & BSS_CHANGED_ASSOC) {
922 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n",
925 ath9k_bss_assoc_info(sc, bss_conf);
929 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
932 struct ath_softc *sc = hw->priv;
933 struct ath_hal *ah = sc->sc_ah;
935 tsf = ath9k_hw_gettsf64(ah);
940 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
942 struct ath_softc *sc = hw->priv;
943 struct ath_hal *ah = sc->sc_ah;
945 ath9k_hw_reset_tsf(ah);
948 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
949 enum ieee80211_ampdu_mlme_action action,
954 struct ath_softc *sc = hw->priv;
958 case IEEE80211_AMPDU_RX_START:
959 ret = ath_rx_aggr_start(sc, addr, tid, ssn);
961 DPRINTF(sc, ATH_DBG_FATAL,
962 "%s: Unable to start RX aggregation\n",
965 case IEEE80211_AMPDU_RX_STOP:
966 ret = ath_rx_aggr_stop(sc, addr, tid);
968 DPRINTF(sc, ATH_DBG_FATAL,
969 "%s: Unable to stop RX aggregation\n",
972 case IEEE80211_AMPDU_TX_START:
973 ret = ath_tx_aggr_start(sc, addr, tid, ssn);
975 DPRINTF(sc, ATH_DBG_FATAL,
976 "%s: Unable to start TX aggregation\n",
979 ieee80211_start_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid);
981 case IEEE80211_AMPDU_TX_STOP:
982 ret = ath_tx_aggr_stop(sc, addr, tid);
984 DPRINTF(sc, ATH_DBG_FATAL,
985 "%s: Unable to stop TX aggregation\n",
988 ieee80211_stop_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid);
991 DPRINTF(sc, ATH_DBG_FATAL,
992 "%s: Unknown AMPDU action\n", __func__);
998 static struct ieee80211_ops ath9k_ops = {
1000 .start = ath9k_start,
1002 .add_interface = ath9k_add_interface,
1003 .remove_interface = ath9k_remove_interface,
1004 .config = ath9k_config,
1005 .config_interface = ath9k_config_interface,
1006 .configure_filter = ath9k_configure_filter,
1008 .sta_notify = ath9k_sta_notify,
1009 .conf_tx = ath9k_conf_tx,
1010 .get_tx_stats = NULL,
1011 .bss_info_changed = ath9k_bss_info_changed,
1013 .set_key = ath9k_set_key,
1015 .get_tkip_seq = NULL,
1016 .set_rts_threshold = NULL,
1017 .set_frag_threshold = NULL,
1018 .set_retry_limit = NULL,
1019 .get_tsf = ath9k_get_tsf,
1020 .reset_tsf = ath9k_reset_tsf,
1021 .tx_last_beacon = NULL,
1022 .ampdu_action = ath9k_ampdu_action
1025 void ath_get_beaconconfig(struct ath_softc *sc,
1027 struct ath_beacon_config *conf)
1029 struct ieee80211_hw *hw = sc->hw;
1031 /* fill in beacon config data */
1033 conf->beacon_interval = hw->conf.beacon_int;
1034 conf->listen_interval = 100;
1035 conf->dtim_count = 1;
1036 conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
1039 int ath_update_beacon(struct ath_softc *sc,
1041 struct ath_beacon_offset *bo,
1042 struct sk_buff *skb,
1048 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
1049 struct ath_xmit_status *tx_status, struct ath_node *an)
1051 struct ieee80211_hw *hw = sc->hw;
1052 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1054 DPRINTF(sc, ATH_DBG_XMIT,
1055 "%s: TX complete: skb: %p\n", __func__, skb);
1057 if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
1058 tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1059 /* free driver's private data area of tx_info */
1060 if (tx_info->driver_data[0] != NULL)
1061 kfree(tx_info->driver_data[0]);
1062 tx_info->driver_data[0] = NULL;
1065 if (tx_status->flags & ATH_TX_BAR) {
1066 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1067 tx_status->flags &= ~ATH_TX_BAR;
1069 if (tx_status->flags)
1070 tx_info->status.excessive_retries = 1;
1072 tx_info->status.retry_count = tx_status->retries;
1074 ieee80211_tx_status(hw, skb);
1076 ath_node_put(sc, an, ATH9K_BH_STATUS_CHANGE);
1079 int ath__rx_indicate(struct ath_softc *sc,
1080 struct sk_buff *skb,
1081 struct ath_recv_status *status,
1084 struct ieee80211_hw *hw = sc->hw;
1085 struct ath_node *an = NULL;
1086 struct ieee80211_rx_status rx_status;
1087 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1088 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1090 enum ATH_RX_TYPE st;
1092 /* see if any padding is done by the hw and remove it */
1094 padsize = hdrlen % 4;
1095 memmove(skb->data + padsize, skb->data, hdrlen);
1096 skb_pull(skb, padsize);
1099 /* remove FCS before passing up to protocol stack */
1100 skb_trim(skb, (skb->len - FCS_LEN));
1102 /* Prepare rx status */
1103 ath9k_rx_prepare(sc, skb, status, &rx_status);
1105 if (!(keyix == ATH9K_RXKEYIX_INVALID) &&
1106 !(status->flags & ATH_RX_DECRYPT_ERROR)) {
1107 rx_status.flag |= RX_FLAG_DECRYPTED;
1108 } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED)
1109 && !(status->flags & ATH_RX_DECRYPT_ERROR)
1110 && skb->len >= hdrlen + 4) {
1111 keyix = skb->data[hdrlen + 3] >> 6;
1113 if (test_bit(keyix, sc->sc_keymap))
1114 rx_status.flag |= RX_FLAG_DECRYPTED;
1117 spin_lock_bh(&sc->node_lock);
1118 an = ath_node_find(sc, hdr->addr2);
1119 spin_unlock_bh(&sc->node_lock);
1122 ath_rx_input(sc, an,
1123 hw->conf.ht_conf.ht_supported,
1126 if (!an || (st != ATH_RX_CONSUMED))
1127 __ieee80211_rx(hw, skb, &rx_status);
1132 int ath_rx_subframe(struct ath_node *an,
1133 struct sk_buff *skb,
1134 struct ath_recv_status *status)
1136 struct ath_softc *sc = an->an_sc;
1137 struct ieee80211_hw *hw = sc->hw;
1138 struct ieee80211_rx_status rx_status;
1140 /* Prepare rx status */
1141 ath9k_rx_prepare(sc, skb, status, &rx_status);
1142 if (!(status->flags & ATH_RX_DECRYPT_ERROR))
1143 rx_status.flag |= RX_FLAG_DECRYPTED;
1145 __ieee80211_rx(hw, skb, &rx_status);
1150 enum ath9k_ht_macmode ath_cwm_macmode(struct ath_softc *sc)
1152 return sc->sc_ht_info.tx_chan_width;
1155 static int ath_detach(struct ath_softc *sc)
1157 struct ieee80211_hw *hw = sc->hw;
1159 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);
1163 ieee80211_unregister_hw(hw);
1165 /* unregister Rate control */
1166 ath_rate_control_unregister();
1180 static int ath_attach(u16 devid,
1181 struct ath_softc *sc)
1183 struct ieee80211_hw *hw = sc->hw;
1186 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__);
1188 error = ath_init(devid, sc);
1194 INIT_LIST_HEAD(&sc->node_list);
1195 spin_lock_init(&sc->node_lock);
1197 /* get mac address from hardware and set in mac80211 */
1199 SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
1201 /* setup channels and rates */
1203 sc->sbands[IEEE80211_BAND_2GHZ].channels =
1204 sc->channels[IEEE80211_BAND_2GHZ];
1205 sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
1206 sc->rates[IEEE80211_BAND_2GHZ];
1207 sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
1209 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
1210 /* Setup HT capabilities for 2.4Ghz*/
1211 setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_info);
1213 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1214 &sc->sbands[IEEE80211_BAND_2GHZ];
1216 if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {
1217 sc->sbands[IEEE80211_BAND_5GHZ].channels =
1218 sc->channels[IEEE80211_BAND_5GHZ];
1219 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
1220 sc->rates[IEEE80211_BAND_5GHZ];
1221 sc->sbands[IEEE80211_BAND_5GHZ].band =
1222 IEEE80211_BAND_5GHZ;
1224 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
1225 /* Setup HT capabilities for 5Ghz*/
1226 setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_info);
1228 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1229 &sc->sbands[IEEE80211_BAND_5GHZ];
1232 /* FIXME: Have to figure out proper hw init values later */
1235 hw->ampdu_queues = 1;
1237 /* Register rate control */
1238 hw->rate_control_algorithm = "ath9k_rate_control";
1239 error = ath_rate_control_register();
1241 DPRINTF(sc, ATH_DBG_FATAL,
1242 "%s: Unable to register rate control "
1243 "algorithm:%d\n", __func__, error);
1244 ath_rate_control_unregister();
1248 error = ieee80211_register_hw(hw);
1250 ath_rate_control_unregister();
1254 /* initialize tx/rx engine */
1256 error = ath_tx_init(sc, ATH_TXBUF);
1260 error = ath_rx_init(sc, ATH_RXBUF);
1271 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1274 struct ath_softc *sc;
1275 struct ieee80211_hw *hw;
1276 const char *athname;
1281 if (pci_enable_device(pdev))
1284 /* XXX 32-bit addressing only */
1285 if (pci_set_dma_mask(pdev, 0xffffffff)) {
1286 printk(KERN_ERR "ath_pci: 32-bit DMA not available\n");
1292 * Cache line size is used to size and align various
1293 * structures used to communicate with the hardware.
1295 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
1298 * Linux 2.4.18 (at least) writes the cache line size
1299 * register as a 16-bit wide register which is wrong.
1300 * We must have this setup properly for rx buffer
1301 * DMA to work so force a reasonable value here if it
1304 csz = L1_CACHE_BYTES / sizeof(u32);
1305 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
1308 * The default setting of latency timer yields poor results,
1309 * set it to the value used by other systems. It may be worth
1310 * tweaking this setting more.
1312 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
1314 pci_set_master(pdev);
1317 * Disable the RETRY_TIMEOUT register (0x41) to keep
1318 * PCI Tx retries from interfering with C3 CPU state.
1320 pci_read_config_dword(pdev, 0x40, &val);
1321 if ((val & 0x0000ff00) != 0)
1322 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1324 ret = pci_request_region(pdev, 0, "ath9k");
1326 dev_err(&pdev->dev, "PCI memory region reserve error\n");
1331 mem = pci_iomap(pdev, 0, 0);
1333 printk(KERN_ERR "PCI memory map error\n") ;
1338 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
1340 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
1344 hw->flags = IEEE80211_HW_SIGNAL_DBM |
1345 IEEE80211_HW_NOISE_DBM;
1347 SET_IEEE80211_DEV(hw, &pdev->dev);
1348 pci_set_drvdata(pdev, hw);
1355 if (ath_attach(id->device, sc) != 0) {
1360 /* setup interrupt service routine */
1362 if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
1363 printk(KERN_ERR "%s: request_irq failed\n",
1364 wiphy_name(hw->wiphy));
1369 athname = ath9k_hw_probe(id->vendor, id->device);
1371 printk(KERN_INFO "%s: %s: mem=0x%lx, irq=%d\n",
1372 wiphy_name(hw->wiphy),
1373 athname ? athname : "Atheros ???",
1374 (unsigned long)mem, pdev->irq);
1380 ieee80211_free_hw(hw);
1382 pci_iounmap(pdev, mem);
1384 pci_release_region(pdev, 0);
1386 pci_disable_device(pdev);
1390 static void ath_pci_remove(struct pci_dev *pdev)
1392 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1393 struct ath_softc *sc = hw->priv;
1396 free_irq(pdev->irq, sc);
1398 pci_iounmap(pdev, sc->mem);
1399 pci_release_region(pdev, 0);
1400 pci_disable_device(pdev);
1401 ieee80211_free_hw(hw);
1406 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1408 pci_save_state(pdev);
1409 pci_disable_device(pdev);
1410 pci_set_power_state(pdev, 3);
1415 static int ath_pci_resume(struct pci_dev *pdev)
1420 err = pci_enable_device(pdev);
1423 pci_restore_state(pdev);
1425 * Suspend/Resume resets the PCI configuration space, so we have to
1426 * re-disable the RETRY_TIMEOUT register (0x41) to keep
1427 * PCI Tx retries from interfering with C3 CPU state
1429 pci_read_config_dword(pdev, 0x40, &val);
1430 if ((val & 0x0000ff00) != 0)
1431 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1436 #endif /* CONFIG_PM */
1438 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
1440 static struct pci_driver ath_pci_driver = {
1442 .id_table = ath_pci_id_table,
1443 .probe = ath_pci_probe,
1444 .remove = ath_pci_remove,
1446 .suspend = ath_pci_suspend,
1447 .resume = ath_pci_resume,
1448 #endif /* CONFIG_PM */
1451 static int __init init_ath_pci(void)
1453 printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION);
1455 if (pci_register_driver(&ath_pci_driver) < 0) {
1457 "ath_pci: No devices found, driver not installed.\n");
1458 pci_unregister_driver(&ath_pci_driver);
1464 module_init(init_ath_pci);
1466 static void __exit exit_ath_pci(void)
1468 pci_unregister_driver(&ath_pci_driver);
1469 printk(KERN_INFO "%s: driver unloaded\n", dev_info);
1471 module_exit(exit_ath_pci);