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);
210 sc->sc_keytype = hk.kv_type;
214 static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key)
216 #define ATH_MAX_NUM_KEYS 4
219 freeslot = (key->keyidx >= ATH_MAX_NUM_KEYS) ? 1 : 0;
220 ath_key_reset(sc, key->keyidx, freeslot);
221 #undef ATH_MAX_NUM_KEYS
224 static void setup_ht_cap(struct ieee80211_ht_info *ht_info)
226 /* Until mac80211 includes these fields */
228 #define IEEE80211_HT_CAP_DSSSCCK40 0x1000
229 #define IEEE80211_HT_CAP_MAXRXAMPDU_65536 0x3 /* 2 ^ 16 */
230 #define IEEE80211_HT_CAP_MPDUDENSITY_8 0x6 /* 8 usec */
232 ht_info->ht_supported = 1;
233 ht_info->cap = (u16)IEEE80211_HT_CAP_SUP_WIDTH
234 |(u16)IEEE80211_HT_CAP_MIMO_PS
235 |(u16)IEEE80211_HT_CAP_SGI_40
236 |(u16)IEEE80211_HT_CAP_DSSSCCK40;
238 ht_info->ampdu_factor = IEEE80211_HT_CAP_MAXRXAMPDU_65536;
239 ht_info->ampdu_density = IEEE80211_HT_CAP_MPDUDENSITY_8;
240 /* setup supported mcs set */
241 memset(ht_info->supp_mcs_set, 0, 16);
242 ht_info->supp_mcs_set[0] = 0xff;
243 ht_info->supp_mcs_set[1] = 0xff;
244 ht_info->supp_mcs_set[12] = IEEE80211_HT_CAP_MCS_TX_DEFINED;
247 static int ath_rate2idx(struct ath_softc *sc, int rate)
249 int i = 0, cur_band, n_rates;
250 struct ieee80211_hw *hw = sc->hw;
252 cur_band = hw->conf.channel->band;
253 n_rates = sc->sbands[cur_band].n_bitrates;
255 for (i = 0; i < n_rates; i++) {
256 if (sc->sbands[cur_band].bitrates[i].bitrate == rate)
261 * NB:mac80211 validates rx rate index against the supported legacy rate
262 * index only (should be done against ht rates also), return the highest
263 * legacy rate index for rx rate which does not match any one of the
264 * supported basic and extended rates to make mac80211 happy.
265 * The following hack will be cleaned up once the issue with
266 * the rx rate index validation in mac80211 is fixed.
273 static void ath9k_rx_prepare(struct ath_softc *sc,
275 struct ath_recv_status *status,
276 struct ieee80211_rx_status *rx_status)
278 struct ieee80211_hw *hw = sc->hw;
279 struct ieee80211_channel *curchan = hw->conf.channel;
281 memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
283 rx_status->mactime = status->tsf;
284 rx_status->band = curchan->band;
285 rx_status->freq = curchan->center_freq;
286 rx_status->noise = ATH_DEFAULT_NOISE_FLOOR;
287 rx_status->signal = rx_status->noise + status->rssi;
288 rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100));
289 rx_status->antenna = status->antenna;
290 rx_status->qual = status->rssi * 100 / 64;
292 if (status->flags & ATH_RX_MIC_ERROR)
293 rx_status->flag |= RX_FLAG_MMIC_ERROR;
294 if (status->flags & ATH_RX_FCS_ERROR)
295 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
297 rx_status->flag |= RX_FLAG_TSFT;
300 static u8 parse_mpdudensity(u8 mpdudensity)
303 * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
304 * 0 for no restriction
313 switch (mpdudensity) {
319 /* Our lower layer calculations limit our precision to
335 static int ath9k_start(struct ieee80211_hw *hw)
337 struct ath_softc *sc = hw->priv;
338 struct ieee80211_channel *curchan = hw->conf.channel;
341 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with "
342 "initial channel: %d MHz\n", __func__, curchan->center_freq);
344 /* setup initial channel */
346 pos = ath_get_channel(sc, curchan);
348 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
352 sc->sc_ah->ah_channels[pos].chanmode =
353 (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;
356 error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);
358 DPRINTF(sc, ATH_DBG_FATAL,
359 "%s: Unable to complete ath_open\n", __func__);
363 ieee80211_wake_queues(hw);
367 static int ath9k_tx(struct ieee80211_hw *hw,
370 struct ath_softc *sc = hw->priv;
373 /* Add the padding after the header if this is not already done */
374 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
376 padsize = hdrlen % 4;
377 if (skb_headroom(skb) < padsize)
379 skb_push(skb, padsize);
380 memmove(skb->data, skb->data + padsize, hdrlen);
383 DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n",
387 if (ath_tx_start(sc, skb) != 0) {
388 DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__);
389 dev_kfree_skb_any(skb);
390 /* FIXME: Check for proper return value from ATH_DEV */
397 static void ath9k_stop(struct ieee80211_hw *hw)
399 struct ath_softc *sc = hw->priv;
402 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);
404 error = ath_suspend(sc);
406 DPRINTF(sc, ATH_DBG_CONFIG,
407 "%s: Device is no longer present\n", __func__);
409 ieee80211_stop_queues(hw);
412 static int ath9k_add_interface(struct ieee80211_hw *hw,
413 struct ieee80211_if_init_conf *conf)
415 struct ath_softc *sc = hw->priv;
416 int error, ic_opmode = 0;
418 /* Support only vap for now */
423 switch (conf->type) {
424 case IEEE80211_IF_TYPE_STA:
425 ic_opmode = ATH9K_M_STA;
427 case IEEE80211_IF_TYPE_IBSS:
428 ic_opmode = ATH9K_M_IBSS;
431 DPRINTF(sc, ATH_DBG_FATAL,
432 "%s: Only STA and IBSS are supported currently\n",
437 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n",
441 error = ath_vap_attach(sc, 0, conf->vif, ic_opmode);
443 DPRINTF(sc, ATH_DBG_FATAL,
444 "%s: Unable to attach vap, error: %d\n",
452 static void ath9k_remove_interface(struct ieee80211_hw *hw,
453 struct ieee80211_if_init_conf *conf)
455 struct ath_softc *sc = hw->priv;
459 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__);
461 avp = sc->sc_vaps[0];
463 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
468 #ifdef CONFIG_SLOW_ANT_DIV
469 ath_slow_ant_div_stop(&sc->sc_antdiv);
472 /* Update ratectrl */
473 ath_rate_newstate(sc, avp);
475 /* Reclaim beacon resources */
476 if (sc->sc_opmode == ATH9K_M_HOSTAP || sc->sc_opmode == ATH9K_M_IBSS) {
477 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
478 ath_beacon_return(sc, avp);
481 /* Set interrupt mask */
482 sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
483 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask & ~ATH9K_INT_GLOBAL);
486 error = ath_vap_detach(sc, 0);
488 DPRINTF(sc, ATH_DBG_FATAL,
489 "%s: Unable to detach vap, error: %d\n",
493 static int ath9k_config(struct ieee80211_hw *hw,
494 struct ieee80211_conf *conf)
496 struct ath_softc *sc = hw->priv;
497 struct ieee80211_channel *curchan = hw->conf.channel;
500 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
502 curchan->center_freq);
504 pos = ath_get_channel(sc, curchan);
506 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);
510 sc->sc_ah->ah_channels[pos].chanmode =
511 (curchan->band == IEEE80211_BAND_2GHZ) ?
512 CHANNEL_G : CHANNEL_A;
514 if (sc->sc_curaid && hw->conf.ht_conf.ht_supported)
515 sc->sc_ah->ah_channels[pos].chanmode =
516 ath_get_extchanmode(sc, curchan);
518 sc->sc_config.txpowlimit = 2 * conf->power_level;
520 /* set h/w channel */
521 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
522 DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n",
528 static int ath9k_config_interface(struct ieee80211_hw *hw,
529 struct ieee80211_vif *vif,
530 struct ieee80211_if_conf *conf)
532 struct ath_softc *sc = hw->priv;
536 DECLARE_MAC_BUF(mac);
538 avp = sc->sc_vaps[0];
540 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
545 if ((conf->changed & IEEE80211_IFCC_BSSID) &&
546 !is_zero_ether_addr(conf->bssid)) {
548 case IEEE80211_IF_TYPE_STA:
549 case IEEE80211_IF_TYPE_IBSS:
550 /* Update ratectrl about the new state */
551 ath_rate_newstate(sc, avp);
554 rfilt = ath_calcrxfilter(sc);
555 ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
558 memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN);
560 ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
563 /* Set aggregation protection mode parameters */
564 sc->sc_config.ath_aggr_prot = 0;
567 * Reset our TSF so that its value is lower than the
568 * beacon that we are trying to catch.
569 * Only then hw will update its TSF register with the
570 * new beacon. Reset the TSF before setting the BSSID
571 * to avoid allowing in any frames that would update
572 * our TSF only to have us clear it
573 * immediately thereafter.
575 ath9k_hw_reset_tsf(sc->sc_ah);
577 /* Disable BMISS interrupt when we're not associated */
578 ath9k_hw_set_interrupts(sc->sc_ah,
580 ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS));
581 sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
583 DPRINTF(sc, ATH_DBG_CONFIG,
584 "%s: RX filter 0x%x bssid %s aid 0x%x\n",
586 print_mac(mac, sc->sc_curbssid), sc->sc_curaid);
588 /* need to reconfigure the beacon */
597 if ((conf->changed & IEEE80211_IFCC_BEACON) &&
598 (vif->type == IEEE80211_IF_TYPE_IBSS)) {
600 * Allocate and setup the beacon frame.
602 * Stop any previous beacon DMA. This may be
603 * necessary, for example, when an ibss merge
604 * causes reconfiguration; we may be called
605 * with beacon transmission active.
607 ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq);
609 error = ath_beacon_alloc(sc, 0);
613 ath_beacon_sync(sc, 0);
616 /* Check for WLAN_CAPABILITY_PRIVACY ? */
617 if ((avp->av_opmode != IEEE80211_IF_TYPE_STA)) {
618 for (i = 0; i < IEEE80211_WEP_NKID; i++)
619 if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i))
620 ath9k_hw_keysetmac(sc->sc_ah,
625 /* Only legacy IBSS for now */
626 if (vif->type == IEEE80211_IF_TYPE_IBSS)
627 ath_update_chainmask(sc, 0);
632 #define SUPPORTED_FILTERS \
633 (FIF_PROMISC_IN_BSS | \
637 FIF_BCN_PRBRESP_PROMISC | \
640 /* Accept unicast, bcast and mcast frames */
642 static void ath9k_configure_filter(struct ieee80211_hw *hw,
643 unsigned int changed_flags,
644 unsigned int *total_flags,
646 struct dev_mc_list *mclist)
648 struct ath_softc *sc = hw->priv;
650 changed_flags &= SUPPORTED_FILTERS;
651 *total_flags &= SUPPORTED_FILTERS;
653 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
654 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
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 if (key->alg == ALG_TKIP)
761 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
765 ath_key_delete(sc, key);
766 clear_bit(key->keyidx, sc->sc_keymap);
767 sc->sc_keytype = ATH9K_CIPHER_CLR;
776 static void ath9k_ht_conf(struct ath_softc *sc,
777 struct ieee80211_bss_conf *bss_conf)
779 #define IEEE80211_HT_CAP_40MHZ_INTOLERANT BIT(14)
780 struct ath_ht_info *ht_info = &sc->sc_ht_info;
782 if (bss_conf->assoc_ht) {
783 ht_info->ext_chan_offset =
784 bss_conf->ht_bss_conf->bss_cap &
785 IEEE80211_HT_IE_CHA_SEC_OFFSET;
787 if (!(bss_conf->ht_conf->cap &
788 IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
789 (bss_conf->ht_bss_conf->bss_cap &
790 IEEE80211_HT_IE_CHA_WIDTH))
791 ht_info->tx_chan_width = ATH9K_HT_MACMODE_2040;
793 ht_info->tx_chan_width = ATH9K_HT_MACMODE_20;
795 ath9k_hw_set11nmac2040(sc->sc_ah, ht_info->tx_chan_width);
796 ht_info->maxampdu = 1 << (IEEE80211_HTCAP_MAXRXAMPDU_FACTOR +
797 bss_conf->ht_conf->ampdu_factor);
798 ht_info->mpdudensity =
799 parse_mpdudensity(bss_conf->ht_conf->ampdu_density);
803 #undef IEEE80211_HT_CAP_40MHZ_INTOLERANT
806 static void ath9k_bss_assoc_info(struct ath_softc *sc,
807 struct ieee80211_bss_conf *bss_conf)
809 struct ieee80211_hw *hw = sc->hw;
810 struct ieee80211_channel *curchan = hw->conf.channel;
813 DECLARE_MAC_BUF(mac);
815 if (bss_conf->assoc) {
816 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n",
820 avp = sc->sc_vaps[0];
822 DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n",
827 /* New association, store aid */
828 if (avp->av_opmode == ATH9K_M_STA) {
829 sc->sc_curaid = bss_conf->aid;
830 ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid,
834 /* Configure the beacon */
835 ath_beacon_config(sc, 0);
838 /* Reset rssi stats */
839 sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER;
840 sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER;
841 sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER;
842 sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER;
844 /* Update chainmask */
845 ath_update_chainmask(sc, bss_conf->assoc_ht);
847 DPRINTF(sc, ATH_DBG_CONFIG,
848 "%s: bssid %s aid 0x%x\n",
850 print_mac(mac, sc->sc_curbssid), sc->sc_curaid);
852 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n",
854 curchan->center_freq);
856 pos = ath_get_channel(sc, curchan);
858 DPRINTF(sc, ATH_DBG_FATAL,
859 "%s: Invalid channel\n", __func__);
863 if (hw->conf.ht_conf.ht_supported)
864 sc->sc_ah->ah_channels[pos].chanmode =
865 ath_get_extchanmode(sc, curchan);
867 sc->sc_ah->ah_channels[pos].chanmode =
868 (curchan->band == IEEE80211_BAND_2GHZ) ?
869 CHANNEL_G : CHANNEL_A;
871 /* set h/w channel */
872 if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0)
873 DPRINTF(sc, ATH_DBG_FATAL,
874 "%s: Unable to set channel\n",
877 ath_rate_newstate(sc, avp);
878 /* Update ratectrl about the new state */
879 ath_rc_node_update(hw, avp->rc_node);
881 DPRINTF(sc, ATH_DBG_CONFIG,
882 "%s: Bss Info DISSOC\n", __func__);
887 static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
888 struct ieee80211_vif *vif,
889 struct ieee80211_bss_conf *bss_conf,
892 struct ath_softc *sc = hw->priv;
894 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
895 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n",
897 bss_conf->use_short_preamble);
898 if (bss_conf->use_short_preamble)
899 sc->sc_flags |= ATH_PREAMBLE_SHORT;
901 sc->sc_flags &= ~ATH_PREAMBLE_SHORT;
904 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
905 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n",
907 bss_conf->use_cts_prot);
908 if (bss_conf->use_cts_prot &&
909 hw->conf.channel->band != IEEE80211_BAND_5GHZ)
910 sc->sc_flags |= ATH_PROTECT_ENABLE;
912 sc->sc_flags &= ~ATH_PROTECT_ENABLE;
915 if (changed & BSS_CHANGED_HT) {
916 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT %d\n",
919 ath9k_ht_conf(sc, bss_conf);
922 if (changed & BSS_CHANGED_ASSOC) {
923 DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n",
926 ath9k_bss_assoc_info(sc, bss_conf);
930 static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
933 struct ath_softc *sc = hw->priv;
934 struct ath_hal *ah = sc->sc_ah;
936 tsf = ath9k_hw_gettsf64(ah);
941 static void ath9k_reset_tsf(struct ieee80211_hw *hw)
943 struct ath_softc *sc = hw->priv;
944 struct ath_hal *ah = sc->sc_ah;
946 ath9k_hw_reset_tsf(ah);
949 static int ath9k_ampdu_action(struct ieee80211_hw *hw,
950 enum ieee80211_ampdu_mlme_action action,
955 struct ath_softc *sc = hw->priv;
959 case IEEE80211_AMPDU_RX_START:
960 ret = ath_rx_aggr_start(sc, addr, tid, ssn);
962 DPRINTF(sc, ATH_DBG_FATAL,
963 "%s: Unable to start RX aggregation\n",
966 case IEEE80211_AMPDU_RX_STOP:
967 ret = ath_rx_aggr_stop(sc, addr, tid);
969 DPRINTF(sc, ATH_DBG_FATAL,
970 "%s: Unable to stop RX aggregation\n",
973 case IEEE80211_AMPDU_TX_START:
974 ret = ath_tx_aggr_start(sc, addr, tid, ssn);
976 DPRINTF(sc, ATH_DBG_FATAL,
977 "%s: Unable to start TX aggregation\n",
980 ieee80211_start_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid);
982 case IEEE80211_AMPDU_TX_STOP:
983 ret = ath_tx_aggr_stop(sc, addr, tid);
985 DPRINTF(sc, ATH_DBG_FATAL,
986 "%s: Unable to stop TX aggregation\n",
989 ieee80211_stop_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid);
992 DPRINTF(sc, ATH_DBG_FATAL,
993 "%s: Unknown AMPDU action\n", __func__);
999 static struct ieee80211_ops ath9k_ops = {
1001 .start = ath9k_start,
1003 .add_interface = ath9k_add_interface,
1004 .remove_interface = ath9k_remove_interface,
1005 .config = ath9k_config,
1006 .config_interface = ath9k_config_interface,
1007 .configure_filter = ath9k_configure_filter,
1009 .sta_notify = ath9k_sta_notify,
1010 .conf_tx = ath9k_conf_tx,
1011 .get_tx_stats = NULL,
1012 .bss_info_changed = ath9k_bss_info_changed,
1014 .set_key = ath9k_set_key,
1016 .get_tkip_seq = NULL,
1017 .set_rts_threshold = NULL,
1018 .set_frag_threshold = NULL,
1019 .set_retry_limit = NULL,
1020 .get_tsf = ath9k_get_tsf,
1021 .reset_tsf = ath9k_reset_tsf,
1022 .tx_last_beacon = NULL,
1023 .ampdu_action = ath9k_ampdu_action
1026 void ath_get_beaconconfig(struct ath_softc *sc,
1028 struct ath_beacon_config *conf)
1030 struct ieee80211_hw *hw = sc->hw;
1032 /* fill in beacon config data */
1034 conf->beacon_interval = hw->conf.beacon_int;
1035 conf->listen_interval = 100;
1036 conf->dtim_count = 1;
1037 conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval;
1040 int ath_update_beacon(struct ath_softc *sc,
1042 struct ath_beacon_offset *bo,
1043 struct sk_buff *skb,
1049 void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
1050 struct ath_xmit_status *tx_status, struct ath_node *an)
1052 struct ieee80211_hw *hw = sc->hw;
1053 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
1055 DPRINTF(sc, ATH_DBG_XMIT,
1056 "%s: TX complete: skb: %p\n", __func__, skb);
1058 if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK ||
1059 tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1060 /* free driver's private data area of tx_info */
1061 if (tx_info->driver_data[0] != NULL)
1062 kfree(tx_info->driver_data[0]);
1063 tx_info->driver_data[0] = NULL;
1066 if (tx_status->flags & ATH_TX_BAR) {
1067 tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1068 tx_status->flags &= ~ATH_TX_BAR;
1071 if (tx_status->flags & (ATH_TX_ERROR | ATH_TX_XRETRY)) {
1072 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
1073 /* Frame was not ACKed, but an ACK was expected */
1074 tx_info->status.excessive_retries = 1;
1077 /* Frame was ACKed */
1078 tx_info->flags |= IEEE80211_TX_STAT_ACK;
1081 tx_info->status.retry_count = tx_status->retries;
1083 ieee80211_tx_status(hw, skb);
1085 ath_node_put(sc, an, ATH9K_BH_STATUS_CHANGE);
1088 int ath__rx_indicate(struct ath_softc *sc,
1089 struct sk_buff *skb,
1090 struct ath_recv_status *status,
1093 struct ieee80211_hw *hw = sc->hw;
1094 struct ath_node *an = NULL;
1095 struct ieee80211_rx_status rx_status;
1096 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1097 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1099 enum ATH_RX_TYPE st;
1101 /* see if any padding is done by the hw and remove it */
1103 padsize = hdrlen % 4;
1104 memmove(skb->data + padsize, skb->data, hdrlen);
1105 skb_pull(skb, padsize);
1108 /* remove FCS before passing up to protocol stack */
1109 skb_trim(skb, (skb->len - FCS_LEN));
1111 /* Prepare rx status */
1112 ath9k_rx_prepare(sc, skb, status, &rx_status);
1114 if (!(keyix == ATH9K_RXKEYIX_INVALID) &&
1115 !(status->flags & ATH_RX_DECRYPT_ERROR)) {
1116 rx_status.flag |= RX_FLAG_DECRYPTED;
1117 } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED)
1118 && !(status->flags & ATH_RX_DECRYPT_ERROR)
1119 && skb->len >= hdrlen + 4) {
1120 keyix = skb->data[hdrlen + 3] >> 6;
1122 if (test_bit(keyix, sc->sc_keymap))
1123 rx_status.flag |= RX_FLAG_DECRYPTED;
1126 spin_lock_bh(&sc->node_lock);
1127 an = ath_node_find(sc, hdr->addr2);
1128 spin_unlock_bh(&sc->node_lock);
1131 ath_rx_input(sc, an,
1132 hw->conf.ht_conf.ht_supported,
1135 if (!an || (st != ATH_RX_CONSUMED))
1136 __ieee80211_rx(hw, skb, &rx_status);
1141 int ath_rx_subframe(struct ath_node *an,
1142 struct sk_buff *skb,
1143 struct ath_recv_status *status)
1145 struct ath_softc *sc = an->an_sc;
1146 struct ieee80211_hw *hw = sc->hw;
1147 struct ieee80211_rx_status rx_status;
1149 /* Prepare rx status */
1150 ath9k_rx_prepare(sc, skb, status, &rx_status);
1151 if (!(status->flags & ATH_RX_DECRYPT_ERROR))
1152 rx_status.flag |= RX_FLAG_DECRYPTED;
1154 __ieee80211_rx(hw, skb, &rx_status);
1159 enum ath9k_ht_macmode ath_cwm_macmode(struct ath_softc *sc)
1161 return sc->sc_ht_info.tx_chan_width;
1164 static int ath_detach(struct ath_softc *sc)
1166 struct ieee80211_hw *hw = sc->hw;
1168 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);
1172 ieee80211_unregister_hw(hw);
1174 /* unregister Rate control */
1175 ath_rate_control_unregister();
1189 static int ath_attach(u16 devid,
1190 struct ath_softc *sc)
1192 struct ieee80211_hw *hw = sc->hw;
1195 DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__);
1197 error = ath_init(devid, sc);
1203 INIT_LIST_HEAD(&sc->node_list);
1204 spin_lock_init(&sc->node_lock);
1206 /* get mac address from hardware and set in mac80211 */
1208 SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);
1210 /* setup channels and rates */
1212 sc->sbands[IEEE80211_BAND_2GHZ].channels =
1213 sc->channels[IEEE80211_BAND_2GHZ];
1214 sc->sbands[IEEE80211_BAND_2GHZ].bitrates =
1215 sc->rates[IEEE80211_BAND_2GHZ];
1216 sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
1218 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
1219 /* Setup HT capabilities for 2.4Ghz*/
1220 setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_info);
1222 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1223 &sc->sbands[IEEE80211_BAND_2GHZ];
1225 if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {
1226 sc->sbands[IEEE80211_BAND_5GHZ].channels =
1227 sc->channels[IEEE80211_BAND_5GHZ];
1228 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
1229 sc->rates[IEEE80211_BAND_5GHZ];
1230 sc->sbands[IEEE80211_BAND_5GHZ].band =
1231 IEEE80211_BAND_5GHZ;
1233 if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
1234 /* Setup HT capabilities for 5Ghz*/
1235 setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_info);
1237 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1238 &sc->sbands[IEEE80211_BAND_5GHZ];
1241 /* FIXME: Have to figure out proper hw init values later */
1244 hw->ampdu_queues = 1;
1246 /* Register rate control */
1247 hw->rate_control_algorithm = "ath9k_rate_control";
1248 error = ath_rate_control_register();
1250 DPRINTF(sc, ATH_DBG_FATAL,
1251 "%s: Unable to register rate control "
1252 "algorithm:%d\n", __func__, error);
1253 ath_rate_control_unregister();
1257 error = ieee80211_register_hw(hw);
1259 ath_rate_control_unregister();
1263 /* initialize tx/rx engine */
1265 error = ath_tx_init(sc, ATH_TXBUF);
1269 error = ath_rx_init(sc, ATH_RXBUF);
1280 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1283 struct ath_softc *sc;
1284 struct ieee80211_hw *hw;
1285 const char *athname;
1290 if (pci_enable_device(pdev))
1293 /* XXX 32-bit addressing only */
1294 if (pci_set_dma_mask(pdev, 0xffffffff)) {
1295 printk(KERN_ERR "ath_pci: 32-bit DMA not available\n");
1301 * Cache line size is used to size and align various
1302 * structures used to communicate with the hardware.
1304 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
1307 * Linux 2.4.18 (at least) writes the cache line size
1308 * register as a 16-bit wide register which is wrong.
1309 * We must have this setup properly for rx buffer
1310 * DMA to work so force a reasonable value here if it
1313 csz = L1_CACHE_BYTES / sizeof(u32);
1314 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
1317 * The default setting of latency timer yields poor results,
1318 * set it to the value used by other systems. It may be worth
1319 * tweaking this setting more.
1321 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
1323 pci_set_master(pdev);
1326 * Disable the RETRY_TIMEOUT register (0x41) to keep
1327 * PCI Tx retries from interfering with C3 CPU state.
1329 pci_read_config_dword(pdev, 0x40, &val);
1330 if ((val & 0x0000ff00) != 0)
1331 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1333 ret = pci_request_region(pdev, 0, "ath9k");
1335 dev_err(&pdev->dev, "PCI memory region reserve error\n");
1340 mem = pci_iomap(pdev, 0, 0);
1342 printk(KERN_ERR "PCI memory map error\n") ;
1347 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
1349 printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
1353 hw->flags = IEEE80211_HW_SIGNAL_DBM |
1354 IEEE80211_HW_NOISE_DBM;
1356 SET_IEEE80211_DEV(hw, &pdev->dev);
1357 pci_set_drvdata(pdev, hw);
1364 if (ath_attach(id->device, sc) != 0) {
1369 /* setup interrupt service routine */
1371 if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
1372 printk(KERN_ERR "%s: request_irq failed\n",
1373 wiphy_name(hw->wiphy));
1378 athname = ath9k_hw_probe(id->vendor, id->device);
1380 printk(KERN_INFO "%s: %s: mem=0x%lx, irq=%d\n",
1381 wiphy_name(hw->wiphy),
1382 athname ? athname : "Atheros ???",
1383 (unsigned long)mem, pdev->irq);
1389 ieee80211_free_hw(hw);
1391 pci_iounmap(pdev, mem);
1393 pci_release_region(pdev, 0);
1395 pci_disable_device(pdev);
1399 static void ath_pci_remove(struct pci_dev *pdev)
1401 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
1402 struct ath_softc *sc = hw->priv;
1405 free_irq(pdev->irq, sc);
1407 pci_iounmap(pdev, sc->mem);
1408 pci_release_region(pdev, 0);
1409 pci_disable_device(pdev);
1410 ieee80211_free_hw(hw);
1415 static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
1417 pci_save_state(pdev);
1418 pci_disable_device(pdev);
1419 pci_set_power_state(pdev, 3);
1424 static int ath_pci_resume(struct pci_dev *pdev)
1429 err = pci_enable_device(pdev);
1432 pci_restore_state(pdev);
1434 * Suspend/Resume resets the PCI configuration space, so we have to
1435 * re-disable the RETRY_TIMEOUT register (0x41) to keep
1436 * PCI Tx retries from interfering with C3 CPU state
1438 pci_read_config_dword(pdev, 0x40, &val);
1439 if ((val & 0x0000ff00) != 0)
1440 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
1445 #endif /* CONFIG_PM */
1447 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
1449 static struct pci_driver ath_pci_driver = {
1451 .id_table = ath_pci_id_table,
1452 .probe = ath_pci_probe,
1453 .remove = ath_pci_remove,
1455 .suspend = ath_pci_suspend,
1456 .resume = ath_pci_resume,
1457 #endif /* CONFIG_PM */
1460 static int __init init_ath_pci(void)
1462 printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION);
1464 if (pci_register_driver(&ath_pci_driver) < 0) {
1466 "ath_pci: No devices found, driver not installed.\n");
1467 pci_unregister_driver(&ath_pci_driver);
1473 module_init(init_ath_pci);
1475 static void __exit exit_ath_pci(void)
1477 pci_unregister_driver(&ath_pci_driver);
1478 printk(KERN_INFO "%s: driver unloaded\n", dev_info);
1480 module_exit(exit_ath_pci);