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);
212 static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key)
214 #define ATH_MAX_NUM_KEYS 4
217 freeslot = (key->keyidx >= ATH_MAX_NUM_KEYS) ? 1 : 0;
218 ath_key_reset(sc, key->keyidx, freeslot);
219 #undef ATH_MAX_NUM_KEYS
222 static void setup_ht_cap(struct ieee80211_ht_info *ht_info)
224 /* Until mac80211 includes these fields */
226 #define IEEE80211_HT_CAP_DSSSCCK40 0x1000
227 #define IEEE80211_HT_CAP_MAXRXAMPDU_65536 0x3 /* 2 ^ 16 */
228 #define IEEE80211_HT_CAP_MPDUDENSITY_8 0x6 /* 8 usec */
230 ht_info->ht_supported = 1;
231 ht_info->cap = (u16)IEEE80211_HT_CAP_SUP_WIDTH
232 |(u16)IEEE80211_HT_CAP_MIMO_PS
233 |(u16)IEEE80211_HT_CAP_SGI_40
234 |(u16)IEEE80211_HT_CAP_DSSSCCK40;
236 ht_info->ampdu_factor = IEEE80211_HT_CAP_MAXRXAMPDU_65536;
237 ht_info->ampdu_density = IEEE80211_HT_CAP_MPDUDENSITY_8;
238 /* setup supported mcs set */
239 memset(ht_info->supp_mcs_set, 0, 16);
240 ht_info->supp_mcs_set[0] = 0xff;
241 ht_info->supp_mcs_set[1] = 0xff;
242 ht_info->supp_mcs_set[12] = IEEE80211_HT_CAP_MCS_TX_DEFINED;
245 static int ath_rate2idx(struct ath_softc *sc, int rate)
247 int i = 0, cur_band, n_rates;
248 struct ieee80211_hw *hw = sc->hw;
250 cur_band = hw->conf.channel->band;
251 n_rates = sc->sbands[cur_band].n_bitrates;
253 for (i = 0; i < n_rates; i++) {
254 if (sc->sbands[cur_band].bitrates[i].bitrate == rate)
259 * NB:mac80211 validates rx rate index against the supported legacy rate
260 * index only (should be done against ht rates also), return the highest
261 * legacy rate index for rx rate which does not match any one of the
262 * supported basic and extended rates to make mac80211 happy.
263 * The following hack will be cleaned up once the issue with
264 * the rx rate index validation in mac80211 is fixed.
271 static void ath9k_rx_prepare(struct ath_softc *sc,
273 struct ath_recv_status *status,
274 struct ieee80211_rx_status *rx_status)
276 struct ieee80211_hw *hw = sc->hw;
277 struct ieee80211_channel *curchan = hw->conf.channel;
279 memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
281 rx_status->mactime = status->tsf;
282 rx_status->band = curchan->band;
283 rx_status->freq = curchan->center_freq;
284 rx_status->noise = ATH_DEFAULT_NOISE_FLOOR;
285 rx_status->signal = rx_status->noise + status->rssi;
286 rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100));
287 rx_status->antenna = status->antenna;
288 rx_status->qual = status->rssi * 100 / 64;
290 if (status->flags & ATH_RX_MIC_ERROR)
291 rx_status->flag |= RX_FLAG_MMIC_ERROR;
292 if (status->flags & ATH_RX_FCS_ERROR)
293 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
295 rx_status->flag |= RX_FLAG_TSFT;
298 static u8 parse_mpdudensity(u8 mpdudensity)
301 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
302 * 0 for no restriction
311 switch (mpdudensity) {
317 /* Our lower layer calculations limit our precision to
333 static int ath9k_start(struct ieee80211_hw *hw)
335 struct ath_softc *sc = hw->priv;
336 struct ieee80211_channel *curchan = hw->conf.channel;
339 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with "
340 "initial channel: %d MHz\n", __func__, curchan->center_freq);
342 /* setup initial channel */
344 pos = ath_get_channel(sc, curchan);
346 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
350 sc->sc_ah->ah_channels[pos].chanmode =
351 (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;
354 error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);
356 DPRINTF(sc, ATH_DBG_FATAL,
357 "%s: Unable to complete ath_open\n", __func__);
361 ieee80211_wake_queues(hw);
365 static int ath9k_tx(struct ieee80211_hw *hw,
368 struct ath_softc *sc = hw->priv;
370 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
373 * As a temporary workaround, assign seq# here; this will likely need
374 * to be cleaned up to work better with Beacon transmission and virtual
377 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
378 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
379 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
381 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
382 hdr->seq_ctrl |= cpu_to_le16(sc->seq_no);
385 /* Add the padding after the header if this is not already done */
386 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
388 padsize = hdrlen % 4;
389 if (skb_headroom(skb) < padsize)
391 skb_push(skb, padsize);
392 memmove(skb->data, skb->data + padsize, hdrlen);
395 DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
399 if (ath_tx_start(sc, skb) != 0) {
400 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
401 dev_kfree_skb_any(skb);
402 /* FIXME: Check for proper return value from ATH_DEV */
409 static void ath9k_stop(struct ieee80211_hw *hw)
411 struct ath_softc *sc = hw->priv;
414 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);
416 error = ath_suspend(sc);
418 DPRINTF(sc, ATH_DBG_CONFIG,
419 "%s: Device is no longer present\n", __func__);
421 ieee80211_stop_queues(hw);
424 static int ath9k_add_interface(struct ieee80211_hw *hw,
425 struct ieee80211_if_init_conf *conf)
427 struct ath_softc *sc = hw->priv;
428 int error, ic_opmode = 0;
430 /* Support only vap for now */
435 switch (conf->type) {
436 case IEEE80211_IF_TYPE_STA:
437 ic_opmode = ATH9K_M_STA;
439 case IEEE80211_IF_TYPE_IBSS:
440 ic_opmode = ATH9K_M_IBSS;
443 DPRINTF(sc, ATH_DBG_FATAL,
444 "%s: Only STA and IBSS are supported currently\n",
449 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n",
453 error = ath_vap_attach(sc, 0, conf->vif, ic_opmode);
455 DPRINTF(sc, ATH_DBG_FATAL,
456 "%s: Unable to attach vap, error: %d\n",
464 static void ath9k_remove_interface(struct ieee80211_hw *hw,
465 struct ieee80211_if_init_conf *conf)
467 struct ath_softc *sc = hw->priv;
471 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__);
473 avp = sc->sc_vaps[0];
475 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
480 #ifdef CONFIG_SLOW_ANT_DIV
481 ath_slow_ant_div_stop(&sc->sc_antdiv);
484 /* Update ratectrl */
485 ath_rate_newstate(sc, avp);
487 /* Reclaim beacon resources */
488 if (sc->sc_opmode == ATH9K_M_HOSTAP || sc->sc_opmode == ATH9K_M_IBSS) {
489 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
490 ath_beacon_return(sc, avp);
493 /* Set interrupt mask */
494 sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
495 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask & ~ATH9K_INT_GLOBAL);
498 error = ath_vap_detach(sc, 0);
500 DPRINTF(sc, ATH_DBG_FATAL,
501 "%s: Unable to detach vap, error: %d\n",
505 static int ath9k_config(struct ieee80211_hw *hw,
506 struct ieee80211_conf *conf)
508 struct ath_softc *sc = hw->priv;
509 struct ieee80211_channel *curchan = hw->conf.channel;
512 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
514 curchan->center_freq);
516 pos = ath_get_channel(sc, curchan);
518 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
522 sc->sc_ah->ah_channels[pos].chanmode =
523 (curchan->band == IEEE80211_BAND_2GHZ) ?
524 CHANNEL_G : CHANNEL_A;
526 if (sc->sc_curaid && hw->conf.ht_conf.ht_supported)
527 sc->sc_ah->ah_channels[pos].chanmode =
528 ath_get_extchanmode(sc, curchan);
530 sc->sc_config.txpowlimit = 2 * conf->power_level;
532 /* set h/w channel */
533 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
534 DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n",
540 static int ath9k_config_interface(struct ieee80211_hw *hw,
541 struct ieee80211_vif *vif,
542 struct ieee80211_if_conf *conf)
544 struct ath_softc *sc = hw->priv;
548 DECLARE_MAC_BUF(mac);
550 avp = sc->sc_vaps[0];
552 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
557 if ((conf->changed & IEEE80211_IFCC_BSSID) &&
558 !is_zero_ether_addr(conf->bssid)) {
560 case IEEE80211_IF_TYPE_STA:
561 case IEEE80211_IF_TYPE_IBSS:
562 /* Update ratectrl about the new state */
563 ath_rate_newstate(sc, avp);
566 rfilt = ath_calcrxfilter(sc);
567 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
570 memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
572 ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
575 /* Set aggregation protection mode parameters */
576 sc->sc_config.ath_aggr_prot = 0;
579 * Reset our TSF so that its value is lower than the
580 * beacon that we are trying to catch.
581 * Only then hw will update its TSF register with the
582 * new beacon. Reset the TSF before setting the BSSID
583 * to avoid allowing in any frames that would update
584 * our TSF only to have us clear it
585 * immediately thereafter.
587 ath9k_hw_reset_tsf(sc->sc_ah);
589 /* Disable BMISS interrupt when we're not associated */
590 ath9k_hw_set_interrupts(sc->sc_ah,
592 ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS));
593 sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
595 DPRINTF(sc, ATH_DBG_CONFIG,
596 "%s: RX filter 0x%x bssid %s aid 0x%x\n",
598 print_mac(mac, sc->sc_curbssid), sc->sc_curaid);
600 /* need to reconfigure the beacon */
609 if ((conf->changed & IEEE80211_IFCC_BEACON) &&
610 (vif->type == IEEE80211_IF_TYPE_IBSS)) {
612 * Allocate and setup the beacon frame.
614 * Stop any previous beacon DMA. This may be
615 * necessary, for example, when an ibss merge
616 * causes reconfiguration; we may be called
617 * with beacon transmission active.
619 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
621 error = ath_beacon_alloc(sc, 0);
625 ath_beacon_sync(sc, 0);
628 /* Check for WLAN_CAPABILITY_PRIVACY ? */
629 if ((avp->av_opmode != IEEE80211_IF_TYPE_STA)) {
630 for (i = 0; i < IEEE80211_WEP_NKID; i++)
631 if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
632 ath9k_hw_keysetmac(sc->sc_ah,
637 /* Only legacy IBSS for now */
638 if (vif->type == IEEE80211_IF_TYPE_IBSS)
639 ath_update_chainmask(sc, 0);
644 #define SUPPORTED_FILTERS \
645 (FIF_PROMISC_IN_BSS | \
649 FIF_BCN_PRBRESP_PROMISC | \
652 /* Accept unicast, bcast and mcast frames */
654 static void ath9k_configure_filter(struct ieee80211_hw *hw,
655 unsigned int changed_flags,
656 unsigned int *total_flags,
658 struct dev_mc_list *mclist)
660 struct ath_softc *sc = hw->priv;
662 changed_flags &= SUPPORTED_FILTERS;
663 *total_flags &= SUPPORTED_FILTERS;
665 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
666 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
673 static void ath9k_sta_notify(struct ieee80211_hw *hw,
674 struct ieee80211_vif *vif,
675 enum sta_notify_cmd cmd,
678 struct ath_softc *sc = hw->priv;
681 DECLARE_MAC_BUF(mac);
683 spin_lock_irqsave(&sc->node_lock, flags);
684 an = ath_node_find(sc, (u8 *) addr);
685 spin_unlock_irqrestore(&sc->node_lock, flags);
689 spin_lock_irqsave(&sc->node_lock, flags);
691 ath_node_attach(sc, (u8 *)addr, 0);
692 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a node: %s\n",
694 print_mac(mac, addr));
696 ath_node_get(sc, (u8 *)addr);
698 spin_unlock_irqrestore(&sc->node_lock, flags);
700 case STA_NOTIFY_REMOVE:
702 DPRINTF(sc, ATH_DBG_FATAL,
703 "%s: Removal of a non-existent node\n",
706 ath_node_put(sc, an, ATH9K_BH_STATUS_INTACT);
707 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Put a node: %s\n",
709 print_mac(mac, addr));
717 static int ath9k_conf_tx(struct ieee80211_hw *hw,
719 const struct ieee80211_tx_queue_params *params)
721 struct ath_softc *sc = hw->priv;
722 struct ath9k_tx_queue_info qi;
725 if (queue >= WME_NUM_AC)
728 qi.tqi_aifs = params->aifs;
729 qi.tqi_cwmin = params->cw_min;
730 qi.tqi_cwmax = params->cw_max;
731 qi.tqi_burstTime = params->txop;
732 qnum = ath_get_hal_qnum(queue, sc);
734 DPRINTF(sc, ATH_DBG_CONFIG,
735 "%s: Configure tx [queue/halq] [%d/%d], "
736 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
745 ret = ath_txq_update(sc, qnum, &qi);
747 DPRINTF(sc, ATH_DBG_FATAL,
748 "%s: TXQ Update failed\n", __func__);
753 static int ath9k_set_key(struct ieee80211_hw *hw,
754 enum set_key_cmd cmd,
755 const u8 *local_addr,
757 struct ieee80211_key_conf *key)
759 struct ath_softc *sc = hw->priv;
762 DPRINTF(sc, ATH_DBG_KEYCACHE, " %s: Set HW Key\n", __func__);
766 ret = ath_key_config(sc, addr, key);
768 set_bit(key->keyidx, sc->sc_keymap);
769 key->hw_key_idx = key->keyidx;
770 /* push IV and Michael MIC generation to stack */
771 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
772 if (key->alg == ALG_TKIP)
773 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
777 ath_key_delete(sc, key);
778 clear_bit(key->keyidx, sc->sc_keymap);
787 static void ath9k_ht_conf(struct ath_softc *sc,
788 struct ieee80211_bss_conf *bss_conf)
790 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT BIT(14)
791 struct ath_ht_info *ht_info = &sc->sc_ht_info;
793 if (bss_conf->assoc_ht) {
794 ht_info->ext_chan_offset =
795 bss_conf->ht_bss_conf->bss_cap &
796 IEEE80211_HT_IE_CHA_SEC_OFFSET;
798 if (!(bss_conf->ht_conf->cap &
799 IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
800 (bss_conf->ht_bss_conf->bss_cap &
801 IEEE80211_HT_IE_CHA_WIDTH))
802 ht_info->tx_chan_width = ATH9K_HT_MACMODE_2040;
804 ht_info->tx_chan_width = ATH9K_HT_MACMODE_20;
806 ath9k_hw_set11nmac2040(sc->sc_ah, ht_info->tx_chan_width);
807 ht_info->maxampdu = 1 << (IEEE80211_HTCAP_MAXRXAMPDU_FACTOR +
808 bss_conf->ht_conf->ampdu_factor);
809 ht_info->mpdudensity =
810 parse_mpdudensity(bss_conf->ht_conf->ampdu_density);
814 #undef IEEE80211_HT_CAP_40MHZ_INTOLERANT
817 static void ath9k_bss_assoc_info(struct ath_softc *sc,
818 struct ieee80211_bss_conf *bss_conf)
820 struct ieee80211_hw *hw = sc->hw;
821 struct ieee80211_channel *curchan = hw->conf.channel;
824 DECLARE_MAC_BUF(mac);
826 if (bss_conf->assoc) {
827 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n",
831 avp = sc->sc_vaps[0];
833 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
838 /* New association, store aid */
839 if (avp->av_opmode == ATH9K_M_STA) {
840 sc->sc_curaid = bss_conf->aid;
841 ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
845 /* Configure the beacon */
846 ath_beacon_config(sc, 0);
849 /* Reset rssi stats */
850 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
851 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
852 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
853 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
855 /* Update chainmask */
856 ath_update_chainmask(sc, bss_conf->assoc_ht);
858 DPRINTF(sc, ATH_DBG_CONFIG,
859 "%s: bssid %s aid 0x%x\n",
861 print_mac(mac, sc->sc_curbssid), sc->sc_curaid);
863 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
865 curchan->center_freq);
867 pos = ath_get_channel(sc, curchan);
869 DPRINTF(sc, ATH_DBG_FATAL,
870 "%s: Invalid channel\n", __func__);
874 if (hw->conf.ht_conf.ht_supported)
875 sc->sc_ah->ah_channels[pos].chanmode =
876 ath_get_extchanmode(sc, curchan);
878 sc->sc_ah->ah_channels[pos].chanmode =
879 (curchan->band == IEEE80211_BAND_2GHZ) ?
880 CHANNEL_G : CHANNEL_A;
882 /* set h/w channel */
883 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
884 DPRINTF(sc, ATH_DBG_FATAL,
885 "%s: Unable to set channel\n",
888 ath_rate_newstate(sc, avp);
889 /* Update ratectrl about the new state */
890 ath_rc_node_update(hw, avp->rc_node);
892 DPRINTF(sc, ATH_DBG_CONFIG,
893 "%s: Bss Info DISSOC\n", __func__);
898 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
899 struct ieee80211_vif *vif,
900 struct ieee80211_bss_conf *bss_conf,
903 struct ath_softc *sc = hw->priv;
905 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
906 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n",
908 bss_conf->use_short_preamble);
909 if (bss_conf->use_short_preamble)
910 sc->sc_flags |= ATH_PREAMBLE_SHORT;
912 sc->sc_flags &= ~ATH_PREAMBLE_SHORT;
915 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
916 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n",
918 bss_conf->use_cts_prot);
919 if (bss_conf->use_cts_prot &&
920 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
921 sc->sc_flags |= ATH_PROTECT_ENABLE;
923 sc->sc_flags &= ~ATH_PROTECT_ENABLE;
926 if (changed & BSS_CHANGED_HT) {
927 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT %d\n",
930 ath9k_ht_conf(sc, bss_conf);
933 if (changed & BSS_CHANGED_ASSOC) {
934 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n",
937 ath9k_bss_assoc_info(sc, bss_conf);
941 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
944 struct ath_softc *sc = hw->priv;
945 struct ath_hal *ah = sc->sc_ah;
947 tsf = ath9k_hw_gettsf64(ah);
952 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
954 struct ath_softc *sc = hw->priv;
955 struct ath_hal *ah = sc->sc_ah;
957 ath9k_hw_reset_tsf(ah);
960 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
961 enum ieee80211_ampdu_mlme_action action,
966 struct ath_softc *sc = hw->priv;
970 case IEEE80211_AMPDU_RX_START:
971 ret = ath_rx_aggr_start(sc, addr, tid, ssn);
973 DPRINTF(sc, ATH_DBG_FATAL,
974 "%s: Unable to start RX aggregation\n",
977 case IEEE80211_AMPDU_RX_STOP:
978 ret = ath_rx_aggr_stop(sc, addr, tid);
980 DPRINTF(sc, ATH_DBG_FATAL,
981 "%s: Unable to stop RX aggregation\n",
984 case IEEE80211_AMPDU_TX_START:
985 ret = ath_tx_aggr_start(sc, addr, tid, ssn);
987 DPRINTF(sc, ATH_DBG_FATAL,
988 "%s: Unable to start TX aggregation\n",
991 ieee80211_start_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid);
993 case IEEE80211_AMPDU_TX_STOP:
994 ret = ath_tx_aggr_stop(sc, addr, tid);
996 DPRINTF(sc, ATH_DBG_FATAL,
997 "%s: Unable to stop TX aggregation\n",
1000 ieee80211_stop_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid);
1003 DPRINTF(sc, ATH_DBG_FATAL,
1004 "%s: Unknown AMPDU action\n", __func__);
1010 static struct ieee80211_ops ath9k_ops = {
1012 .start = ath9k_start,
1014 .add_interface = ath9k_add_interface,
1015 .remove_interface = ath9k_remove_interface,
1016 .config = ath9k_config,
1017 .config_interface = ath9k_config_interface,
1018 .configure_filter = ath9k_configure_filter,
1020 .sta_notify = ath9k_sta_notify,
1021 .conf_tx = ath9k_conf_tx,
1022 .get_tx_stats = NULL,
1023 .bss_info_changed = ath9k_bss_info_changed,
1025 .set_key = ath9k_set_key,
1027 .get_tkip_seq = NULL,
1028 .set_rts_threshold = NULL,
1029 .set_frag_threshold = NULL,
1030 .set_retry_limit = NULL,
1031 .get_tsf = ath9k_get_tsf,
1032 .reset_tsf = ath9k_reset_tsf,
1033 .tx_last_beacon = NULL,
1034 .ampdu_action = ath9k_ampdu_action
1037 void ath_get_beaconconfig(struct ath_softc *sc,
1039 struct ath_beacon_config *conf)
1041 struct ieee80211_hw *hw = sc->hw;
1043 /* fill in beacon config data */
1045 conf->beacon_interval = hw->conf.beacon_int;
1046 conf->listen_interval = 100;
1047 conf->dtim_count = 1;
1048 conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
1051 int ath_update_beacon(struct ath_softc *sc,
1053 struct ath_beacon_offset *bo,
1054 struct sk_buff *skb,
1060 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
1061 struct ath_xmit_status *tx_status, struct ath_node *an)
1063 struct ieee80211_hw *hw = sc->hw;
1064 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1066 DPRINTF(sc, ATH_DBG_XMIT,
1067 "%s: TX complete: skb: %p\n", __func__, skb);
1069 if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
1070 tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1071 /* free driver's private data area of tx_info */
1072 if (tx_info->driver_data[0] != NULL)
1073 kfree(tx_info->driver_data[0]);
1074 tx_info->driver_data[0] = NULL;
1077 if (tx_status->flags & ATH_TX_BAR) {
1078 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1079 tx_status->flags &= ~ATH_TX_BAR;
1082 if (tx_status->flags & (ATH_TX_ERROR | ATH_TX_XRETRY)) {
1083 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1084 /* Frame was not ACKed, but an ACK was expected */
1085 tx_info->status.excessive_retries = 1;
1088 /* Frame was ACKed */
1089 tx_info->flags |= IEEE80211_TX_STAT_ACK;
1092 tx_info->status.retry_count = tx_status->retries;
1094 ieee80211_tx_status(hw, skb);
1096 ath_node_put(sc, an, ATH9K_BH_STATUS_CHANGE);
1099 int ath__rx_indicate(struct ath_softc *sc,
1100 struct sk_buff *skb,
1101 struct ath_recv_status *status,
1104 struct ieee80211_hw *hw = sc->hw;
1105 struct ath_node *an = NULL;
1106 struct ieee80211_rx_status rx_status;
1107 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1108 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1110 enum ATH_RX_TYPE st;
1112 /* see if any padding is done by the hw and remove it */
1114 padsize = hdrlen % 4;
1115 memmove(skb->data + padsize, skb->data, hdrlen);
1116 skb_pull(skb, padsize);
1119 /* remove FCS before passing up to protocol stack */
1120 skb_trim(skb, (skb->len - FCS_LEN));
1122 /* Prepare rx status */
1123 ath9k_rx_prepare(sc, skb, status, &rx_status);
1125 if (!(keyix == ATH9K_RXKEYIX_INVALID) &&
1126 !(status->flags & ATH_RX_DECRYPT_ERROR)) {
1127 rx_status.flag |= RX_FLAG_DECRYPTED;
1128 } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED)
1129 && !(status->flags & ATH_RX_DECRYPT_ERROR)
1130 && skb->len >= hdrlen + 4) {
1131 keyix = skb->data[hdrlen + 3] >> 6;
1133 if (test_bit(keyix, sc->sc_keymap))
1134 rx_status.flag |= RX_FLAG_DECRYPTED;
1137 spin_lock_bh(&sc->node_lock);
1138 an = ath_node_find(sc, hdr->addr2);
1139 spin_unlock_bh(&sc->node_lock);
1142 ath_rx_input(sc, an,
1143 hw->conf.ht_conf.ht_supported,
1146 if (!an || (st != ATH_RX_CONSUMED))
1147 __ieee80211_rx(hw, skb, &rx_status);
1152 int ath_rx_subframe(struct ath_node *an,
1153 struct sk_buff *skb,
1154 struct ath_recv_status *status)
1156 struct ath_softc *sc = an->an_sc;
1157 struct ieee80211_hw *hw = sc->hw;
1158 struct ieee80211_rx_status rx_status;
1160 /* Prepare rx status */
1161 ath9k_rx_prepare(sc, skb, status, &rx_status);
1162 if (!(status->flags & ATH_RX_DECRYPT_ERROR))
1163 rx_status.flag |= RX_FLAG_DECRYPTED;
1165 __ieee80211_rx(hw, skb, &rx_status);
1170 enum ath9k_ht_macmode ath_cwm_macmode(struct ath_softc *sc)
1172 return sc->sc_ht_info.tx_chan_width;
1175 static int ath_detach(struct ath_softc *sc)
1177 struct ieee80211_hw *hw = sc->hw;
1179 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);
1183 ieee80211_unregister_hw(hw);
1185 /* unregister Rate control */
1186 ath_rate_control_unregister();
1200 static int ath_attach(u16 devid,
1201 struct ath_softc *sc)
1203 struct ieee80211_hw *hw = sc->hw;
1206 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__);
1208 error = ath_init(devid, sc);
1214 INIT_LIST_HEAD(&sc->node_list);
1215 spin_lock_init(&sc->node_lock);
1217 /* get mac address from hardware and set in mac80211 */
1219 SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
1221 /* setup channels and rates */
1223 sc->sbands[IEEE80211_BAND_2GHZ].channels =
1224 sc->channels[IEEE80211_BAND_2GHZ];
1225 sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
1226 sc->rates[IEEE80211_BAND_2GHZ];
1227 sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
1229 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
1230 /* Setup HT capabilities for 2.4Ghz*/
1231 setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_info);
1233 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1234 &sc->sbands[IEEE80211_BAND_2GHZ];
1236 if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {
1237 sc->sbands[IEEE80211_BAND_5GHZ].channels =
1238 sc->channels[IEEE80211_BAND_5GHZ];
1239 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
1240 sc->rates[IEEE80211_BAND_5GHZ];
1241 sc->sbands[IEEE80211_BAND_5GHZ].band =
1242 IEEE80211_BAND_5GHZ;
1244 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
1245 /* Setup HT capabilities for 5Ghz*/
1246 setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_info);
1248 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1249 &sc->sbands[IEEE80211_BAND_5GHZ];
1252 /* FIXME: Have to figure out proper hw init values later */
1255 hw->ampdu_queues = 1;
1257 /* Register rate control */
1258 hw->rate_control_algorithm = "ath9k_rate_control";
1259 error = ath_rate_control_register();
1261 DPRINTF(sc, ATH_DBG_FATAL,
1262 "%s: Unable to register rate control "
1263 "algorithm:%d\n", __func__, error);
1264 ath_rate_control_unregister();
1268 error = ieee80211_register_hw(hw);
1270 ath_rate_control_unregister();
1274 /* initialize tx/rx engine */
1276 error = ath_tx_init(sc, ATH_TXBUF);
1280 error = ath_rx_init(sc, ATH_RXBUF);
1291 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1294 struct ath_softc *sc;
1295 struct ieee80211_hw *hw;
1296 const char *athname;
1301 if (pci_enable_device(pdev))
1304 /* XXX 32-bit addressing only */
1305 if (pci_set_dma_mask(pdev, 0xffffffff)) {
1306 printk(KERN_ERR "ath_pci: 32-bit DMA not available\n");
1312 * Cache line size is used to size and align various
1313 * structures used to communicate with the hardware.
1315 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
1318 * Linux 2.4.18 (at least) writes the cache line size
1319 * register as a 16-bit wide register which is wrong.
1320 * We must have this setup properly for rx buffer
1321 * DMA to work so force a reasonable value here if it
1324 csz = L1_CACHE_BYTES / sizeof(u32);
1325 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
1328 * The default setting of latency timer yields poor results,
1329 * set it to the value used by other systems. It may be worth
1330 * tweaking this setting more.
1332 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
1334 pci_set_master(pdev);
1337 * Disable the RETRY_TIMEOUT register (0x41) to keep
1338 * PCI Tx retries from interfering with C3 CPU state.
1340 pci_read_config_dword(pdev, 0x40, &val);
1341 if ((val & 0x0000ff00) != 0)
1342 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1344 ret = pci_request_region(pdev, 0, "ath9k");
1346 dev_err(&pdev->dev, "PCI memory region reserve error\n");
1351 mem = pci_iomap(pdev, 0, 0);
1353 printk(KERN_ERR "PCI memory map error\n") ;
1358 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
1360 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
1364 hw->flags = IEEE80211_HW_SIGNAL_DBM |
1365 IEEE80211_HW_NOISE_DBM;
1367 SET_IEEE80211_DEV(hw, &pdev->dev);
1368 pci_set_drvdata(pdev, hw);
1375 if (ath_attach(id->device, sc) != 0) {
1380 /* setup interrupt service routine */
1382 if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
1383 printk(KERN_ERR "%s: request_irq failed\n",
1384 wiphy_name(hw->wiphy));
1389 athname = ath9k_hw_probe(id->vendor, id->device);
1391 printk(KERN_INFO "%s: %s: mem=0x%lx, irq=%d\n",
1392 wiphy_name(hw->wiphy),
1393 athname ? athname : "Atheros ???",
1394 (unsigned long)mem, pdev->irq);
1400 ieee80211_free_hw(hw);
1402 pci_iounmap(pdev, mem);
1404 pci_release_region(pdev, 0);
1406 pci_disable_device(pdev);
1410 static void ath_pci_remove(struct pci_dev *pdev)
1412 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1413 struct ath_softc *sc = hw->priv;
1414 enum ath9k_int status;
1417 ath9k_hw_set_interrupts(sc->sc_ah, 0);
1419 ath9k_hw_getisr(sc->sc_ah, &status);
1421 free_irq(pdev->irq, sc);
1425 pci_iounmap(pdev, sc->mem);
1426 pci_release_region(pdev, 0);
1427 pci_disable_device(pdev);
1428 ieee80211_free_hw(hw);
1433 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1435 pci_save_state(pdev);
1436 pci_disable_device(pdev);
1437 pci_set_power_state(pdev, 3);
1442 static int ath_pci_resume(struct pci_dev *pdev)
1447 err = pci_enable_device(pdev);
1450 pci_restore_state(pdev);
1452 * Suspend/Resume resets the PCI configuration space, so we have to
1453 * re-disable the RETRY_TIMEOUT register (0x41) to keep
1454 * PCI Tx retries from interfering with C3 CPU state
1456 pci_read_config_dword(pdev, 0x40, &val);
1457 if ((val & 0x0000ff00) != 0)
1458 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1463 #endif /* CONFIG_PM */
1465 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
1467 static struct pci_driver ath_pci_driver = {
1469 .id_table = ath_pci_id_table,
1470 .probe = ath_pci_probe,
1471 .remove = ath_pci_remove,
1473 .suspend = ath_pci_suspend,
1474 .resume = ath_pci_resume,
1475 #endif /* CONFIG_PM */
1478 static int __init init_ath_pci(void)
1480 printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION);
1482 if (pci_register_driver(&ath_pci_driver) < 0) {
1484 "ath_pci: No devices found, driver not installed.\n");
1485 pci_unregister_driver(&ath_pci_driver);
1491 module_init(init_ath_pci);
1493 static void __exit exit_ath_pci(void)
1495 pci_unregister_driver(&ath_pci_driver);
1496 printk(KERN_INFO "%s: driver unloaded\n", dev_info);
1498 module_exit(exit_ath_pci);