2 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
3 * Copyright (c) 2004-2005 Atheros Communications, Inc.
4 * Copyright (c) 2006 Devicescape Software, Inc.
5 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
6 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer,
15 * without modification.
16 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
17 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
18 * redistribution must be conditioned upon including a substantially
19 * similar Disclaimer requirement for further binary redistribution.
20 * 3. Neither the names of the above-listed copyright holders nor the names
21 * of any contributors may be used to endorse or promote products derived
22 * from this software without specific prior written permission.
24 * Alternatively, this software may be distributed under the terms of the
25 * GNU General Public License ("GPL") version 2 as published by the Free
26 * Software Foundation.
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
32 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
33 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
34 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
37 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
39 * THE POSSIBILITY OF SUCH DAMAGES.
43 #include <linux/module.h>
44 #include <linux/delay.h>
45 #include <linux/hardirq.h>
48 #include <linux/netdevice.h>
49 #include <linux/cache.h>
50 #include <linux/ethtool.h>
51 #include <linux/uaccess.h>
52 #include <linux/slab.h>
53 #include <linux/etherdevice.h>
55 #include <net/ieee80211_radiotap.h>
57 #include <asm/unaligned.h>
64 int ath5k_modparam_nohwcrypt;
65 module_param_named(nohwcrypt, ath5k_modparam_nohwcrypt, bool, S_IRUGO);
66 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
68 static int modparam_all_channels;
69 module_param_named(all_channels, modparam_all_channels, bool, S_IRUGO);
70 MODULE_PARM_DESC(all_channels, "Expose all channels the device can use.");
73 MODULE_AUTHOR("Jiri Slaby");
74 MODULE_AUTHOR("Nick Kossifidis");
75 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
76 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
77 MODULE_LICENSE("Dual BSD/GPL");
79 static int ath5k_init(struct ieee80211_hw *hw);
80 static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan,
82 int ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
83 void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf);
86 static const struct ath5k_srev_name srev_names[] = {
87 #ifdef CONFIG_ATHEROS_AR231X
88 { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R2 },
89 { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R7 },
90 { "2313", AR5K_VERSION_MAC, AR5K_SREV_AR2313_R8 },
91 { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R6 },
92 { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R7 },
93 { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R1 },
94 { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R2 },
96 { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 },
97 { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 },
98 { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A },
99 { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B },
100 { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 },
101 { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 },
102 { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 },
103 { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A },
104 { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 },
105 { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 },
106 { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 },
107 { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 },
108 { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 },
109 { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 },
110 { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 },
111 { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 },
112 { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 },
113 { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 },
115 { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN },
116 { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 },
117 { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 },
118 { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A },
119 { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 },
120 { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 },
121 { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A },
122 { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B },
123 { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 },
124 { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A },
125 { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B },
126 { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 },
127 { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 },
128 { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 },
129 { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 },
130 #ifdef CONFIG_ATHEROS_AR231X
131 { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 },
132 { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 },
134 { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN },
137 static const struct ieee80211_rate ath5k_rates[] = {
139 .hw_value = ATH5K_RATE_CODE_1M, },
141 .hw_value = ATH5K_RATE_CODE_2M,
142 .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE,
143 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
145 .hw_value = ATH5K_RATE_CODE_5_5M,
146 .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE,
147 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
149 .hw_value = ATH5K_RATE_CODE_11M,
150 .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE,
151 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
153 .hw_value = ATH5K_RATE_CODE_6M,
156 .hw_value = ATH5K_RATE_CODE_9M,
159 .hw_value = ATH5K_RATE_CODE_12M,
162 .hw_value = ATH5K_RATE_CODE_18M,
165 .hw_value = ATH5K_RATE_CODE_24M,
168 .hw_value = ATH5K_RATE_CODE_36M,
171 .hw_value = ATH5K_RATE_CODE_48M,
174 .hw_value = ATH5K_RATE_CODE_54M,
179 static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
181 u64 tsf = ath5k_hw_get_tsf64(ah);
183 if ((tsf & 0x7fff) < rstamp)
186 return (tsf & ~0x7fff) | rstamp;
190 ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
192 const char *name = "xxxxx";
195 for (i = 0; i < ARRAY_SIZE(srev_names); i++) {
196 if (srev_names[i].sr_type != type)
199 if ((val & 0xf0) == srev_names[i].sr_val)
200 name = srev_names[i].sr_name;
202 if ((val & 0xff) == srev_names[i].sr_val) {
203 name = srev_names[i].sr_name;
210 static unsigned int ath5k_ioread32(void *hw_priv, u32 reg_offset)
212 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
213 return ath5k_hw_reg_read(ah, reg_offset);
216 static void ath5k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
218 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
219 ath5k_hw_reg_write(ah, val, reg_offset);
222 static const struct ath_ops ath5k_common_ops = {
223 .read = ath5k_ioread32,
224 .write = ath5k_iowrite32,
227 /***********************\
228 * Driver Initialization *
229 \***********************/
231 static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
233 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
234 struct ath5k_softc *sc = hw->priv;
235 struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah);
237 return ath_reg_notifier_apply(wiphy, request, regulatory);
240 /********************\
241 * Channel/mode setup *
242 \********************/
245 * Convert IEEE channel number to MHz frequency.
248 ath5k_ieee2mhz(short chan)
250 if (chan <= 14 || chan >= 27)
251 return ieee80211chan2mhz(chan);
253 return 2212 + chan * 20;
257 * Returns true for the channel numbers used without all_channels modparam.
259 static bool ath5k_is_standard_channel(short chan)
261 return ((chan <= 14) ||
263 ((chan & 3) == 0 && chan >= 36 && chan <= 64) ||
265 ((chan & 3) == 0 && chan >= 100 && chan <= 140) ||
267 ((chan & 3) == 1 && chan >= 149 && chan <= 165));
271 ath5k_copy_channels(struct ath5k_hw *ah,
272 struct ieee80211_channel *channels,
276 unsigned int i, count, size, chfreq, freq, ch;
278 if (!test_bit(mode, ah->ah_modes))
283 /* 1..220, but 2GHz frequencies are filtered by check_channel */
285 chfreq = CHANNEL_5GHZ;
290 chfreq = CHANNEL_2GHZ;
293 ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
297 for (i = 0, count = 0; i < size && max > 0; i++) {
299 freq = ath5k_ieee2mhz(ch);
301 /* Check if channel is supported by the chipset */
302 if (!ath5k_channel_ok(ah, freq, chfreq))
305 if (!modparam_all_channels && !ath5k_is_standard_channel(ch))
308 /* Write channel info and increment counter */
309 channels[count].center_freq = freq;
310 channels[count].band = (chfreq == CHANNEL_2GHZ) ?
311 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
315 channels[count].hw_value = chfreq | CHANNEL_OFDM;
318 channels[count].hw_value = CHANNEL_B;
329 ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
333 for (i = 0; i < AR5K_MAX_RATES; i++)
334 sc->rate_idx[b->band][i] = -1;
336 for (i = 0; i < b->n_bitrates; i++) {
337 sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
338 if (b->bitrates[i].hw_value_short)
339 sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
344 ath5k_setup_bands(struct ieee80211_hw *hw)
346 struct ath5k_softc *sc = hw->priv;
347 struct ath5k_hw *ah = sc->ah;
348 struct ieee80211_supported_band *sband;
349 int max_c, count_c = 0;
352 BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
353 max_c = ARRAY_SIZE(sc->channels);
356 sband = &sc->sbands[IEEE80211_BAND_2GHZ];
357 sband->band = IEEE80211_BAND_2GHZ;
358 sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
360 if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
362 memcpy(sband->bitrates, &ath5k_rates[0],
363 sizeof(struct ieee80211_rate) * 12);
364 sband->n_bitrates = 12;
366 sband->channels = sc->channels;
367 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
368 AR5K_MODE_11G, max_c);
370 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
371 count_c = sband->n_channels;
373 } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
375 memcpy(sband->bitrates, &ath5k_rates[0],
376 sizeof(struct ieee80211_rate) * 4);
377 sband->n_bitrates = 4;
379 /* 5211 only supports B rates and uses 4bit rate codes
380 * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
383 if (ah->ah_version == AR5K_AR5211) {
384 for (i = 0; i < 4; i++) {
385 sband->bitrates[i].hw_value =
386 sband->bitrates[i].hw_value & 0xF;
387 sband->bitrates[i].hw_value_short =
388 sband->bitrates[i].hw_value_short & 0xF;
392 sband->channels = sc->channels;
393 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
394 AR5K_MODE_11B, max_c);
396 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
397 count_c = sband->n_channels;
400 ath5k_setup_rate_idx(sc, sband);
402 /* 5GHz band, A mode */
403 if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
404 sband = &sc->sbands[IEEE80211_BAND_5GHZ];
405 sband->band = IEEE80211_BAND_5GHZ;
406 sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
408 memcpy(sband->bitrates, &ath5k_rates[4],
409 sizeof(struct ieee80211_rate) * 8);
410 sband->n_bitrates = 8;
412 sband->channels = &sc->channels[count_c];
413 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
414 AR5K_MODE_11A, max_c);
416 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
418 ath5k_setup_rate_idx(sc, sband);
420 ath5k_debug_dump_bands(sc);
426 * Set/change channels. We always reset the chip.
427 * To accomplish this we must first cleanup any pending DMA,
428 * then restart stuff after a la ath5k_init.
430 * Called with sc->lock.
433 ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
435 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
436 "channel set, resetting (%u -> %u MHz)\n",
437 sc->curchan->center_freq, chan->center_freq);
440 * To switch channels clear any pending DMA operations;
441 * wait long enough for the RX fifo to drain, reset the
442 * hardware at the new frequency, and then re-enable
443 * the relevant bits of the h/w.
445 return ath5k_reset(sc, chan, true);
449 ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
453 if (mode == AR5K_MODE_11A) {
454 sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ];
456 sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ];
460 struct ath_vif_iter_data {
461 const u8 *hw_macaddr;
463 u8 active_mac[ETH_ALEN]; /* first active MAC */
464 bool need_set_hw_addr;
467 enum nl80211_iftype opmode;
470 static void ath_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
472 struct ath_vif_iter_data *iter_data = data;
474 struct ath5k_vif *avf = (void *)vif->drv_priv;
476 if (iter_data->hw_macaddr)
477 for (i = 0; i < ETH_ALEN; i++)
478 iter_data->mask[i] &=
479 ~(iter_data->hw_macaddr[i] ^ mac[i]);
481 if (!iter_data->found_active) {
482 iter_data->found_active = true;
483 memcpy(iter_data->active_mac, mac, ETH_ALEN);
486 if (iter_data->need_set_hw_addr && iter_data->hw_macaddr)
487 if (compare_ether_addr(iter_data->hw_macaddr, mac) == 0)
488 iter_data->need_set_hw_addr = false;
490 if (!iter_data->any_assoc) {
492 iter_data->any_assoc = true;
495 /* Calculate combined mode - when APs are active, operate in AP mode.
496 * Otherwise use the mode of the new interface. This can currently
497 * only deal with combinations of APs and STAs. Only one ad-hoc
498 * interfaces is allowed.
500 if (avf->opmode == NL80211_IFTYPE_AP)
501 iter_data->opmode = NL80211_IFTYPE_AP;
503 if (iter_data->opmode == NL80211_IFTYPE_UNSPECIFIED)
504 iter_data->opmode = avf->opmode;
508 ath5k_update_bssid_mask_and_opmode(struct ath5k_softc *sc,
509 struct ieee80211_vif *vif)
511 struct ath_common *common = ath5k_hw_common(sc->ah);
512 struct ath_vif_iter_data iter_data;
515 * Use the hardware MAC address as reference, the hardware uses it
516 * together with the BSSID mask when matching addresses.
518 iter_data.hw_macaddr = common->macaddr;
519 memset(&iter_data.mask, 0xff, ETH_ALEN);
520 iter_data.found_active = false;
521 iter_data.need_set_hw_addr = true;
522 iter_data.opmode = NL80211_IFTYPE_UNSPECIFIED;
525 ath_vif_iter(&iter_data, vif->addr, vif);
527 /* Get list of all active MAC addresses */
528 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath_vif_iter,
530 memcpy(sc->bssidmask, iter_data.mask, ETH_ALEN);
532 sc->opmode = iter_data.opmode;
533 if (sc->opmode == NL80211_IFTYPE_UNSPECIFIED)
534 /* Nothing active, default to station mode */
535 sc->opmode = NL80211_IFTYPE_STATION;
537 ath5k_hw_set_opmode(sc->ah, sc->opmode);
538 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d (%s)\n",
539 sc->opmode, ath_opmode_to_string(sc->opmode));
541 if (iter_data.need_set_hw_addr && iter_data.found_active)
542 ath5k_hw_set_lladdr(sc->ah, iter_data.active_mac);
544 if (ath5k_hw_hasbssidmask(sc->ah))
545 ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
549 ath5k_mode_setup(struct ath5k_softc *sc, struct ieee80211_vif *vif)
551 struct ath5k_hw *ah = sc->ah;
554 /* configure rx filter */
555 rfilt = sc->filter_flags;
556 ath5k_hw_set_rx_filter(ah, rfilt);
557 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
559 ath5k_update_bssid_mask_and_opmode(sc, vif);
563 ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
567 /* return base rate on errors */
568 if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES,
569 "hw_rix out of bounds: %x\n", hw_rix))
572 rix = sc->rate_idx[sc->curband->band][hw_rix];
573 if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix))
584 struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr)
586 struct ath_common *common = ath5k_hw_common(sc->ah);
590 * Allocate buffer with headroom_needed space for the
591 * fake physical layer header at the start.
593 skb = ath_rxbuf_alloc(common,
598 ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
603 *skb_addr = dma_map_single(sc->dev,
604 skb->data, common->rx_bufsize,
607 if (unlikely(dma_mapping_error(sc->dev, *skb_addr))) {
608 ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
616 ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
618 struct ath5k_hw *ah = sc->ah;
619 struct sk_buff *skb = bf->skb;
620 struct ath5k_desc *ds;
624 skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
631 * Setup descriptors. For receive we always terminate
632 * the descriptor list with a self-linked entry so we'll
633 * not get overrun under high load (as can happen with a
634 * 5212 when ANI processing enables PHY error frames).
636 * To ensure the last descriptor is self-linked we create
637 * each descriptor as self-linked and add it to the end. As
638 * each additional descriptor is added the previous self-linked
639 * entry is "fixed" naturally. This should be safe even
640 * if DMA is happening. When processing RX interrupts we
641 * never remove/process the last, self-linked, entry on the
642 * descriptor list. This ensures the hardware always has
643 * someplace to write a new frame.
646 ds->ds_link = bf->daddr; /* link to self */
647 ds->ds_data = bf->skbaddr;
648 ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0);
650 ATH5K_ERR(sc, "%s: could not setup RX desc\n", __func__);
654 if (sc->rxlink != NULL)
655 *sc->rxlink = bf->daddr;
656 sc->rxlink = &ds->ds_link;
660 static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb)
662 struct ieee80211_hdr *hdr;
663 enum ath5k_pkt_type htype;
666 hdr = (struct ieee80211_hdr *)skb->data;
667 fc = hdr->frame_control;
669 if (ieee80211_is_beacon(fc))
670 htype = AR5K_PKT_TYPE_BEACON;
671 else if (ieee80211_is_probe_resp(fc))
672 htype = AR5K_PKT_TYPE_PROBE_RESP;
673 else if (ieee80211_is_atim(fc))
674 htype = AR5K_PKT_TYPE_ATIM;
675 else if (ieee80211_is_pspoll(fc))
676 htype = AR5K_PKT_TYPE_PSPOLL;
678 htype = AR5K_PKT_TYPE_NORMAL;
684 ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
685 struct ath5k_txq *txq, int padsize)
687 struct ath5k_hw *ah = sc->ah;
688 struct ath5k_desc *ds = bf->desc;
689 struct sk_buff *skb = bf->skb;
690 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
691 unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
692 struct ieee80211_rate *rate;
693 unsigned int mrr_rate[3], mrr_tries[3];
700 flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
703 bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len,
706 rate = ieee80211_get_tx_rate(sc->hw, info);
712 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
713 flags |= AR5K_TXDESC_NOACK;
715 rc_flags = info->control.rates[0].flags;
716 hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ?
717 rate->hw_value_short : rate->hw_value;
721 /* FIXME: If we are in g mode and rate is a CCK rate
722 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
723 * from tx power (value is in dB units already) */
724 if (info->control.hw_key) {
725 keyidx = info->control.hw_key->hw_key_idx;
726 pktlen += info->control.hw_key->icv_len;
728 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
729 flags |= AR5K_TXDESC_RTSENA;
730 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
731 duration = le16_to_cpu(ieee80211_rts_duration(sc->hw,
732 info->control.vif, pktlen, info));
734 if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
735 flags |= AR5K_TXDESC_CTSENA;
736 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
737 duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw,
738 info->control.vif, pktlen, info));
740 ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
741 ieee80211_get_hdrlen_from_skb(skb), padsize,
742 get_hw_packet_type(skb),
743 (sc->power_level * 2),
745 info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags,
750 memset(mrr_rate, 0, sizeof(mrr_rate));
751 memset(mrr_tries, 0, sizeof(mrr_tries));
752 for (i = 0; i < 3; i++) {
753 rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
757 mrr_rate[i] = rate->hw_value;
758 mrr_tries[i] = info->control.rates[i + 1].count;
761 ath5k_hw_setup_mrr_tx_desc(ah, ds,
762 mrr_rate[0], mrr_tries[0],
763 mrr_rate[1], mrr_tries[1],
764 mrr_rate[2], mrr_tries[2]);
767 ds->ds_data = bf->skbaddr;
769 spin_lock_bh(&txq->lock);
770 list_add_tail(&bf->list, &txq->q);
772 if (txq->link == NULL) /* is this first packet? */
773 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
774 else /* no, so only link it */
775 *txq->link = bf->daddr;
777 txq->link = &ds->ds_link;
778 ath5k_hw_start_tx_dma(ah, txq->qnum);
780 spin_unlock_bh(&txq->lock);
784 dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE);
788 /*******************\
789 * Descriptors setup *
790 \*******************/
793 ath5k_desc_alloc(struct ath5k_softc *sc)
795 struct ath5k_desc *ds;
796 struct ath5k_buf *bf;
801 /* allocate descriptors */
802 sc->desc_len = sizeof(struct ath5k_desc) *
803 (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
805 sc->desc = dma_alloc_coherent(sc->dev, sc->desc_len,
806 &sc->desc_daddr, GFP_KERNEL);
807 if (sc->desc == NULL) {
808 ATH5K_ERR(sc, "can't allocate descriptors\n");
814 ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
815 ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
817 bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
818 sizeof(struct ath5k_buf), GFP_KERNEL);
820 ATH5K_ERR(sc, "can't allocate bufptr\n");
826 INIT_LIST_HEAD(&sc->rxbuf);
827 for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
830 list_add_tail(&bf->list, &sc->rxbuf);
833 INIT_LIST_HEAD(&sc->txbuf);
834 sc->txbuf_len = ATH_TXBUF;
835 for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
839 list_add_tail(&bf->list, &sc->txbuf);
843 INIT_LIST_HEAD(&sc->bcbuf);
844 for (i = 0; i < ATH_BCBUF; i++, bf++, ds++, da += sizeof(*ds)) {
847 list_add_tail(&bf->list, &sc->bcbuf);
852 dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr);
859 ath5k_txbuf_free_skb(struct ath5k_softc *sc, struct ath5k_buf *bf)
864 dma_unmap_single(sc->dev, bf->skbaddr, bf->skb->len,
866 dev_kfree_skb_any(bf->skb);
869 bf->desc->ds_data = 0;
873 ath5k_rxbuf_free_skb(struct ath5k_softc *sc, struct ath5k_buf *bf)
875 struct ath5k_hw *ah = sc->ah;
876 struct ath_common *common = ath5k_hw_common(ah);
881 dma_unmap_single(sc->dev, bf->skbaddr, common->rx_bufsize,
883 dev_kfree_skb_any(bf->skb);
886 bf->desc->ds_data = 0;
890 ath5k_desc_free(struct ath5k_softc *sc)
892 struct ath5k_buf *bf;
894 list_for_each_entry(bf, &sc->txbuf, list)
895 ath5k_txbuf_free_skb(sc, bf);
896 list_for_each_entry(bf, &sc->rxbuf, list)
897 ath5k_rxbuf_free_skb(sc, bf);
898 list_for_each_entry(bf, &sc->bcbuf, list)
899 ath5k_txbuf_free_skb(sc, bf);
901 /* Free memory associated with all descriptors */
902 dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr);
915 static struct ath5k_txq *
916 ath5k_txq_setup(struct ath5k_softc *sc,
917 int qtype, int subtype)
919 struct ath5k_hw *ah = sc->ah;
920 struct ath5k_txq *txq;
921 struct ath5k_txq_info qi = {
922 .tqi_subtype = subtype,
923 /* XXX: default values not correct for B and XR channels,
925 .tqi_aifs = AR5K_TUNE_AIFS,
926 .tqi_cw_min = AR5K_TUNE_CWMIN,
927 .tqi_cw_max = AR5K_TUNE_CWMAX
932 * Enable interrupts only for EOL and DESC conditions.
933 * We mark tx descriptors to receive a DESC interrupt
934 * when a tx queue gets deep; otherwise we wait for the
935 * EOL to reap descriptors. Note that this is done to
936 * reduce interrupt load and this only defers reaping
937 * descriptors, never transmitting frames. Aside from
938 * reducing interrupts this also permits more concurrency.
939 * The only potential downside is if the tx queue backs
940 * up in which case the top half of the kernel may backup
941 * due to a lack of tx descriptors.
943 qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
944 AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
945 qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
948 * NB: don't print a message, this happens
949 * normally on parts with too few tx queues
951 return ERR_PTR(qnum);
953 if (qnum >= ARRAY_SIZE(sc->txqs)) {
954 ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
955 qnum, ARRAY_SIZE(sc->txqs));
956 ath5k_hw_release_tx_queue(ah, qnum);
957 return ERR_PTR(-EINVAL);
959 txq = &sc->txqs[qnum];
963 INIT_LIST_HEAD(&txq->q);
964 spin_lock_init(&txq->lock);
967 txq->txq_poll_mark = false;
970 return &sc->txqs[qnum];
974 ath5k_beaconq_setup(struct ath5k_hw *ah)
976 struct ath5k_txq_info qi = {
977 /* XXX: default values not correct for B and XR channels,
979 .tqi_aifs = AR5K_TUNE_AIFS,
980 .tqi_cw_min = AR5K_TUNE_CWMIN,
981 .tqi_cw_max = AR5K_TUNE_CWMAX,
982 /* NB: for dynamic turbo, don't enable any other interrupts */
983 .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
986 return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
990 ath5k_beaconq_config(struct ath5k_softc *sc)
992 struct ath5k_hw *ah = sc->ah;
993 struct ath5k_txq_info qi;
996 ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
1000 if (sc->opmode == NL80211_IFTYPE_AP ||
1001 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
1003 * Always burst out beacon and CAB traffic
1004 * (aifs = cwmin = cwmax = 0)
1009 } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
1011 * Adhoc mode; backoff between 0 and (2 * cw_min).
1015 qi.tqi_cw_max = 2 * AR5K_TUNE_CWMIN;
1018 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1019 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
1020 qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
1022 ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
1024 ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
1025 "hardware queue!\n", __func__);
1028 ret = ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */
1032 /* reconfigure cabq with ready time to 80% of beacon_interval */
1033 ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
1037 qi.tqi_ready_time = (sc->bintval * 80) / 100;
1038 ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
1042 ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB);
1048 * ath5k_drain_tx_buffs - Empty tx buffers
1050 * @sc The &struct ath5k_softc
1052 * Empty tx buffers from all queues in preparation
1053 * of a reset or during shutdown.
1055 * NB: this assumes output has been stopped and
1056 * we do not need to block ath5k_tx_tasklet
1059 ath5k_drain_tx_buffs(struct ath5k_softc *sc)
1061 struct ath5k_txq *txq;
1062 struct ath5k_buf *bf, *bf0;
1065 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
1066 if (sc->txqs[i].setup) {
1068 spin_lock_bh(&txq->lock);
1069 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1070 ath5k_debug_printtxbuf(sc, bf);
1072 ath5k_txbuf_free_skb(sc, bf);
1074 spin_lock_bh(&sc->txbuflock);
1075 list_move_tail(&bf->list, &sc->txbuf);
1078 spin_unlock_bh(&sc->txbuflock);
1081 txq->txq_poll_mark = false;
1082 spin_unlock_bh(&txq->lock);
1088 ath5k_txq_release(struct ath5k_softc *sc)
1090 struct ath5k_txq *txq = sc->txqs;
1093 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
1095 ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
1106 * Enable the receive h/w following a reset.
1109 ath5k_rx_start(struct ath5k_softc *sc)
1111 struct ath5k_hw *ah = sc->ah;
1112 struct ath_common *common = ath5k_hw_common(ah);
1113 struct ath5k_buf *bf;
1116 common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz);
1118 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n",
1119 common->cachelsz, common->rx_bufsize);
1121 spin_lock_bh(&sc->rxbuflock);
1123 list_for_each_entry(bf, &sc->rxbuf, list) {
1124 ret = ath5k_rxbuf_setup(sc, bf);
1126 spin_unlock_bh(&sc->rxbuflock);
1130 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1131 ath5k_hw_set_rxdp(ah, bf->daddr);
1132 spin_unlock_bh(&sc->rxbuflock);
1134 ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
1135 ath5k_mode_setup(sc, NULL); /* set filters, etc. */
1136 ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
1144 * Disable the receive logic on PCU (DRU)
1145 * In preparation for a shutdown.
1147 * Note: Doesn't stop rx DMA, ath5k_hw_dma_stop
1151 ath5k_rx_stop(struct ath5k_softc *sc)
1153 struct ath5k_hw *ah = sc->ah;
1155 ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */
1156 ath5k_hw_stop_rx_pcu(ah); /* disable PCU */
1158 ath5k_debug_printrxbuffs(sc, ah);
1162 ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb,
1163 struct ath5k_rx_status *rs)
1165 struct ath5k_hw *ah = sc->ah;
1166 struct ath_common *common = ath5k_hw_common(ah);
1167 struct ieee80211_hdr *hdr = (void *)skb->data;
1168 unsigned int keyix, hlen;
1170 if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1171 rs->rs_keyix != AR5K_RXKEYIX_INVALID)
1172 return RX_FLAG_DECRYPTED;
1174 /* Apparently when a default key is used to decrypt the packet
1175 the hw does not set the index used to decrypt. In such cases
1176 get the index from the packet. */
1177 hlen = ieee80211_hdrlen(hdr->frame_control);
1178 if (ieee80211_has_protected(hdr->frame_control) &&
1179 !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1180 skb->len >= hlen + 4) {
1181 keyix = skb->data[hlen + 3] >> 6;
1183 if (test_bit(keyix, common->keymap))
1184 return RX_FLAG_DECRYPTED;
1192 ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
1193 struct ieee80211_rx_status *rxs)
1195 struct ath_common *common = ath5k_hw_common(sc->ah);
1198 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1200 if (ieee80211_is_beacon(mgmt->frame_control) &&
1201 le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
1202 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) {
1204 * Received an IBSS beacon with the same BSSID. Hardware *must*
1205 * have updated the local TSF. We have to work around various
1206 * hardware bugs, though...
1208 tsf = ath5k_hw_get_tsf64(sc->ah);
1209 bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1210 hw_tu = TSF_TO_TU(tsf);
1212 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1213 "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
1214 (unsigned long long)bc_tstamp,
1215 (unsigned long long)rxs->mactime,
1216 (unsigned long long)(rxs->mactime - bc_tstamp),
1217 (unsigned long long)tsf);
1220 * Sometimes the HW will give us a wrong tstamp in the rx
1221 * status, causing the timestamp extension to go wrong.
1222 * (This seems to happen especially with beacon frames bigger
1223 * than 78 byte (incl. FCS))
1224 * But we know that the receive timestamp must be later than the
1225 * timestamp of the beacon since HW must have synced to that.
1227 * NOTE: here we assume mactime to be after the frame was
1228 * received, not like mac80211 which defines it at the start.
1230 if (bc_tstamp > rxs->mactime) {
1231 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1232 "fixing mactime from %llx to %llx\n",
1233 (unsigned long long)rxs->mactime,
1234 (unsigned long long)tsf);
1239 * Local TSF might have moved higher than our beacon timers,
1240 * in that case we have to update them to continue sending
1241 * beacons. This also takes care of synchronizing beacon sending
1242 * times with other stations.
1244 if (hw_tu >= sc->nexttbtt)
1245 ath5k_beacon_update_timers(sc, bc_tstamp);
1247 /* Check if the beacon timers are still correct, because a TSF
1248 * update might have created a window between them - for a
1249 * longer description see the comment of this function: */
1250 if (!ath5k_hw_check_beacon_timers(sc->ah, sc->bintval)) {
1251 ath5k_beacon_update_timers(sc, bc_tstamp);
1252 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1253 "fixed beacon timers after beacon receive\n");
1259 ath5k_update_beacon_rssi(struct ath5k_softc *sc, struct sk_buff *skb, int rssi)
1261 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1262 struct ath5k_hw *ah = sc->ah;
1263 struct ath_common *common = ath5k_hw_common(ah);
1265 /* only beacons from our BSSID */
1266 if (!ieee80211_is_beacon(mgmt->frame_control) ||
1267 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0)
1270 ewma_add(&ah->ah_beacon_rssi_avg, rssi);
1272 /* in IBSS mode we should keep RSSI statistics per neighbour */
1273 /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */
1277 * Compute padding position. skb must contain an IEEE 802.11 frame
1279 static int ath5k_common_padpos(struct sk_buff *skb)
1281 struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
1282 __le16 frame_control = hdr->frame_control;
1285 if (ieee80211_has_a4(frame_control)) {
1288 if (ieee80211_is_data_qos(frame_control)) {
1289 padpos += IEEE80211_QOS_CTL_LEN;
1296 * This function expects an 802.11 frame and returns the number of
1297 * bytes added, or -1 if we don't have enough header room.
1299 static int ath5k_add_padding(struct sk_buff *skb)
1301 int padpos = ath5k_common_padpos(skb);
1302 int padsize = padpos & 3;
1304 if (padsize && skb->len>padpos) {
1306 if (skb_headroom(skb) < padsize)
1309 skb_push(skb, padsize);
1310 memmove(skb->data, skb->data+padsize, padpos);
1318 * The MAC header is padded to have 32-bit boundary if the
1319 * packet payload is non-zero. The general calculation for
1320 * padsize would take into account odd header lengths:
1321 * padsize = 4 - (hdrlen & 3); however, since only
1322 * even-length headers are used, padding can only be 0 or 2
1323 * bytes and we can optimize this a bit. We must not try to
1324 * remove padding from short control frames that do not have a
1327 * This function expects an 802.11 frame and returns the number of
1330 static int ath5k_remove_padding(struct sk_buff *skb)
1332 int padpos = ath5k_common_padpos(skb);
1333 int padsize = padpos & 3;
1335 if (padsize && skb->len>=padpos+padsize) {
1336 memmove(skb->data + padsize, skb->data, padpos);
1337 skb_pull(skb, padsize);
1345 ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb,
1346 struct ath5k_rx_status *rs)
1348 struct ieee80211_rx_status *rxs;
1350 ath5k_remove_padding(skb);
1352 rxs = IEEE80211_SKB_RXCB(skb);
1355 if (unlikely(rs->rs_status & AR5K_RXERR_MIC))
1356 rxs->flag |= RX_FLAG_MMIC_ERROR;
1359 * always extend the mac timestamp, since this information is
1360 * also needed for proper IBSS merging.
1362 * XXX: it might be too late to do it here, since rs_tstamp is
1363 * 15bit only. that means TSF extension has to be done within
1364 * 32768usec (about 32ms). it might be necessary to move this to
1365 * the interrupt handler, like it is done in madwifi.
1367 * Unfortunately we don't know when the hardware takes the rx
1368 * timestamp (beginning of phy frame, data frame, end of rx?).
1369 * The only thing we know is that it is hardware specific...
1370 * On AR5213 it seems the rx timestamp is at the end of the
1371 * frame, but i'm not sure.
1373 * NOTE: mac80211 defines mactime at the beginning of the first
1374 * data symbol. Since we don't have any time references it's
1375 * impossible to comply to that. This affects IBSS merge only
1376 * right now, so it's not too bad...
1378 rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp);
1379 rxs->flag |= RX_FLAG_TSFT;
1381 rxs->freq = sc->curchan->center_freq;
1382 rxs->band = sc->curband->band;
1384 rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi;
1386 rxs->antenna = rs->rs_antenna;
1388 if (rs->rs_antenna > 0 && rs->rs_antenna < 5)
1389 sc->stats.antenna_rx[rs->rs_antenna]++;
1391 sc->stats.antenna_rx[0]++; /* invalid */
1393 rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate);
1394 rxs->flag |= ath5k_rx_decrypted(sc, skb, rs);
1396 if (rxs->rate_idx >= 0 && rs->rs_rate ==
1397 sc->curband->bitrates[rxs->rate_idx].hw_value_short)
1398 rxs->flag |= RX_FLAG_SHORTPRE;
1400 ath5k_debug_dump_skb(sc, skb, "RX ", 0);
1402 ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi);
1404 /* check beacons in IBSS mode */
1405 if (sc->opmode == NL80211_IFTYPE_ADHOC)
1406 ath5k_check_ibss_tsf(sc, skb, rxs);
1408 ieee80211_rx(sc->hw, skb);
1411 /** ath5k_frame_receive_ok() - Do we want to receive this frame or not?
1413 * Check if we want to further process this frame or not. Also update
1414 * statistics. Return true if we want this frame, false if not.
1417 ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs)
1419 sc->stats.rx_all_count++;
1420 sc->stats.rx_bytes_count += rs->rs_datalen;
1422 if (unlikely(rs->rs_status)) {
1423 if (rs->rs_status & AR5K_RXERR_CRC)
1424 sc->stats.rxerr_crc++;
1425 if (rs->rs_status & AR5K_RXERR_FIFO)
1426 sc->stats.rxerr_fifo++;
1427 if (rs->rs_status & AR5K_RXERR_PHY) {
1428 sc->stats.rxerr_phy++;
1429 if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32)
1430 sc->stats.rxerr_phy_code[rs->rs_phyerr]++;
1433 if (rs->rs_status & AR5K_RXERR_DECRYPT) {
1435 * Decrypt error. If the error occurred
1436 * because there was no hardware key, then
1437 * let the frame through so the upper layers
1438 * can process it. This is necessary for 5210
1439 * parts which have no way to setup a ``clear''
1442 * XXX do key cache faulting
1444 sc->stats.rxerr_decrypt++;
1445 if (rs->rs_keyix == AR5K_RXKEYIX_INVALID &&
1446 !(rs->rs_status & AR5K_RXERR_CRC))
1449 if (rs->rs_status & AR5K_RXERR_MIC) {
1450 sc->stats.rxerr_mic++;
1454 /* reject any frames with non-crypto errors */
1455 if (rs->rs_status & ~(AR5K_RXERR_DECRYPT))
1459 if (unlikely(rs->rs_more)) {
1460 sc->stats.rxerr_jumbo++;
1467 ath5k_tasklet_rx(unsigned long data)
1469 struct ath5k_rx_status rs = {};
1470 struct sk_buff *skb, *next_skb;
1471 dma_addr_t next_skb_addr;
1472 struct ath5k_softc *sc = (void *)data;
1473 struct ath5k_hw *ah = sc->ah;
1474 struct ath_common *common = ath5k_hw_common(ah);
1475 struct ath5k_buf *bf;
1476 struct ath5k_desc *ds;
1479 spin_lock(&sc->rxbuflock);
1480 if (list_empty(&sc->rxbuf)) {
1481 ATH5K_WARN(sc, "empty rx buf pool\n");
1485 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1486 BUG_ON(bf->skb == NULL);
1490 /* bail if HW is still using self-linked descriptor */
1491 if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr)
1494 ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
1495 if (unlikely(ret == -EINPROGRESS))
1497 else if (unlikely(ret)) {
1498 ATH5K_ERR(sc, "error in processing rx descriptor\n");
1499 sc->stats.rxerr_proc++;
1503 if (ath5k_receive_frame_ok(sc, &rs)) {
1504 next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr);
1507 * If we can't replace bf->skb with a new skb under
1508 * memory pressure, just skip this packet
1513 dma_unmap_single(sc->dev, bf->skbaddr,
1517 skb_put(skb, rs.rs_datalen);
1519 ath5k_receive_frame(sc, skb, &rs);
1522 bf->skbaddr = next_skb_addr;
1525 list_move_tail(&bf->list, &sc->rxbuf);
1526 } while (ath5k_rxbuf_setup(sc, bf) == 0);
1528 spin_unlock(&sc->rxbuflock);
1537 ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
1538 struct ath5k_txq *txq)
1540 struct ath5k_softc *sc = hw->priv;
1541 struct ath5k_buf *bf;
1542 unsigned long flags;
1545 ath5k_debug_dump_skb(sc, skb, "TX ", 1);
1548 * The hardware expects the header padded to 4 byte boundaries.
1549 * If this is not the case, we add the padding after the header.
1551 padsize = ath5k_add_padding(skb);
1553 ATH5K_ERR(sc, "tx hdrlen not %%4: not enough"
1554 " headroom to pad");
1558 if (txq->txq_len >= ATH5K_TXQ_LEN_MAX)
1559 ieee80211_stop_queue(hw, txq->qnum);
1561 spin_lock_irqsave(&sc->txbuflock, flags);
1562 if (list_empty(&sc->txbuf)) {
1563 ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
1564 spin_unlock_irqrestore(&sc->txbuflock, flags);
1565 ieee80211_stop_queues(hw);
1568 bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
1569 list_del(&bf->list);
1571 if (list_empty(&sc->txbuf))
1572 ieee80211_stop_queues(hw);
1573 spin_unlock_irqrestore(&sc->txbuflock, flags);
1577 if (ath5k_txbuf_setup(sc, bf, txq, padsize)) {
1579 spin_lock_irqsave(&sc->txbuflock, flags);
1580 list_add_tail(&bf->list, &sc->txbuf);
1582 spin_unlock_irqrestore(&sc->txbuflock, flags);
1585 return NETDEV_TX_OK;
1588 dev_kfree_skb_any(skb);
1589 return NETDEV_TX_OK;
1593 ath5k_tx_frame_completed(struct ath5k_softc *sc, struct sk_buff *skb,
1594 struct ath5k_tx_status *ts)
1596 struct ieee80211_tx_info *info;
1599 sc->stats.tx_all_count++;
1600 sc->stats.tx_bytes_count += skb->len;
1601 info = IEEE80211_SKB_CB(skb);
1603 ieee80211_tx_info_clear_status(info);
1604 for (i = 0; i < 4; i++) {
1605 struct ieee80211_tx_rate *r =
1606 &info->status.rates[i];
1608 if (ts->ts_rate[i]) {
1609 r->idx = ath5k_hw_to_driver_rix(sc, ts->ts_rate[i]);
1610 r->count = ts->ts_retry[i];
1617 /* count the successful attempt as well */
1618 info->status.rates[ts->ts_final_idx].count++;
1620 if (unlikely(ts->ts_status)) {
1621 sc->stats.ack_fail++;
1622 if (ts->ts_status & AR5K_TXERR_FILT) {
1623 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1624 sc->stats.txerr_filt++;
1626 if (ts->ts_status & AR5K_TXERR_XRETRY)
1627 sc->stats.txerr_retry++;
1628 if (ts->ts_status & AR5K_TXERR_FIFO)
1629 sc->stats.txerr_fifo++;
1631 info->flags |= IEEE80211_TX_STAT_ACK;
1632 info->status.ack_signal = ts->ts_rssi;
1636 * Remove MAC header padding before giving the frame
1639 ath5k_remove_padding(skb);
1641 if (ts->ts_antenna > 0 && ts->ts_antenna < 5)
1642 sc->stats.antenna_tx[ts->ts_antenna]++;
1644 sc->stats.antenna_tx[0]++; /* invalid */
1646 ieee80211_tx_status(sc->hw, skb);
1650 ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1652 struct ath5k_tx_status ts = {};
1653 struct ath5k_buf *bf, *bf0;
1654 struct ath5k_desc *ds;
1655 struct sk_buff *skb;
1658 spin_lock(&txq->lock);
1659 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1661 txq->txq_poll_mark = false;
1663 /* skb might already have been processed last time. */
1664 if (bf->skb != NULL) {
1667 ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
1668 if (unlikely(ret == -EINPROGRESS))
1670 else if (unlikely(ret)) {
1672 "error %d while processing "
1673 "queue %u\n", ret, txq->qnum);
1680 dma_unmap_single(sc->dev, bf->skbaddr, skb->len,
1682 ath5k_tx_frame_completed(sc, skb, &ts);
1686 * It's possible that the hardware can say the buffer is
1687 * completed when it hasn't yet loaded the ds_link from
1688 * host memory and moved on.
1689 * Always keep the last descriptor to avoid HW races...
1691 if (ath5k_hw_get_txdp(sc->ah, txq->qnum) != bf->daddr) {
1692 spin_lock(&sc->txbuflock);
1693 list_move_tail(&bf->list, &sc->txbuf);
1696 spin_unlock(&sc->txbuflock);
1699 spin_unlock(&txq->lock);
1700 if (txq->txq_len < ATH5K_TXQ_LEN_LOW && txq->qnum < 4)
1701 ieee80211_wake_queue(sc->hw, txq->qnum);
1705 ath5k_tasklet_tx(unsigned long data)
1708 struct ath5k_softc *sc = (void *)data;
1710 for (i=0; i < AR5K_NUM_TX_QUEUES; i++)
1711 if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i)))
1712 ath5k_tx_processq(sc, &sc->txqs[i]);
1721 * Setup the beacon frame for transmit.
1724 ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1726 struct sk_buff *skb = bf->skb;
1727 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1728 struct ath5k_hw *ah = sc->ah;
1729 struct ath5k_desc *ds;
1733 const int padsize = 0;
1735 bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len,
1737 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] "
1738 "skbaddr %llx\n", skb, skb->data, skb->len,
1739 (unsigned long long)bf->skbaddr);
1741 if (dma_mapping_error(sc->dev, bf->skbaddr)) {
1742 ATH5K_ERR(sc, "beacon DMA mapping failed\n");
1747 antenna = ah->ah_tx_ant;
1749 flags = AR5K_TXDESC_NOACK;
1750 if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) {
1751 ds->ds_link = bf->daddr; /* self-linked */
1752 flags |= AR5K_TXDESC_VEOL;
1757 * If we use multiple antennas on AP and use
1758 * the Sectored AP scenario, switch antenna every
1759 * 4 beacons to make sure everybody hears our AP.
1760 * When a client tries to associate, hw will keep
1761 * track of the tx antenna to be used for this client
1762 * automaticaly, based on ACKed packets.
1764 * Note: AP still listens and transmits RTS on the
1765 * default antenna which is supposed to be an omni.
1767 * Note2: On sectored scenarios it's possible to have
1768 * multiple antennas (1 omni -- the default -- and 14
1769 * sectors), so if we choose to actually support this
1770 * mode, we need to allow the user to set how many antennas
1771 * we have and tweak the code below to send beacons
1774 if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP)
1775 antenna = sc->bsent & 4 ? 2 : 1;
1778 /* FIXME: If we are in g mode and rate is a CCK rate
1779 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
1780 * from tx power (value is in dB units already) */
1781 ds->ds_data = bf->skbaddr;
1782 ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
1783 ieee80211_get_hdrlen_from_skb(skb), padsize,
1784 AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
1785 ieee80211_get_tx_rate(sc->hw, info)->hw_value,
1786 1, AR5K_TXKEYIX_INVALID,
1787 antenna, flags, 0, 0);
1793 dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE);
1798 * Updates the beacon that is sent by ath5k_beacon_send. For adhoc,
1799 * this is called only once at config_bss time, for AP we do it every
1800 * SWBA interrupt so that the TIM will reflect buffered frames.
1802 * Called with the beacon lock.
1805 ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1808 struct ath5k_softc *sc = hw->priv;
1809 struct ath5k_vif *avf = (void *)vif->drv_priv;
1810 struct sk_buff *skb;
1812 if (WARN_ON(!vif)) {
1817 skb = ieee80211_beacon_get(hw, vif);
1824 ath5k_debug_dump_skb(sc, skb, "BC ", 1);
1826 ath5k_txbuf_free_skb(sc, avf->bbuf);
1827 avf->bbuf->skb = skb;
1828 ret = ath5k_beacon_setup(sc, avf->bbuf);
1830 avf->bbuf->skb = NULL;
1836 * Transmit a beacon frame at SWBA. Dynamic updates to the
1837 * frame contents are done as needed and the slot time is
1838 * also adjusted based on current state.
1840 * This is called from software irq context (beacontq tasklets)
1841 * or user context from ath5k_beacon_config.
1844 ath5k_beacon_send(struct ath5k_softc *sc)
1846 struct ath5k_hw *ah = sc->ah;
1847 struct ieee80211_vif *vif;
1848 struct ath5k_vif *avf;
1849 struct ath5k_buf *bf;
1850 struct sk_buff *skb;
1852 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
1855 * Check if the previous beacon has gone out. If
1856 * not, don't don't try to post another: skip this
1857 * period and wait for the next. Missed beacons
1858 * indicate a problem and should not occur. If we
1859 * miss too many consecutive beacons reset the device.
1861 if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
1863 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1864 "missed %u consecutive beacons\n", sc->bmisscount);
1865 if (sc->bmisscount > 10) { /* NB: 10 is a guess */
1866 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1867 "stuck beacon time (%u missed)\n",
1869 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
1870 "stuck beacon, resetting\n");
1871 ieee80211_queue_work(sc->hw, &sc->reset_work);
1875 if (unlikely(sc->bmisscount != 0)) {
1876 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1877 "resume beacon xmit after %u misses\n",
1882 if ((sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) ||
1883 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
1884 u64 tsf = ath5k_hw_get_tsf64(ah);
1885 u32 tsftu = TSF_TO_TU(tsf);
1886 int slot = ((tsftu % sc->bintval) * ATH_BCBUF) / sc->bintval;
1887 vif = sc->bslot[(slot + 1) % ATH_BCBUF];
1888 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1889 "tsf %llx tsftu %x intval %u slot %u vif %p\n",
1890 (unsigned long long)tsf, tsftu, sc->bintval, slot, vif);
1891 } else /* only one interface */
1897 avf = (void *)vif->drv_priv;
1899 if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION ||
1900 sc->opmode == NL80211_IFTYPE_MONITOR)) {
1901 ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
1906 * Stop any current dma and put the new frame on the queue.
1907 * This should never fail since we check above that no frames
1908 * are still pending on the queue.
1910 if (unlikely(ath5k_hw_stop_beacon_queue(ah, sc->bhalq))) {
1911 ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq);
1912 /* NB: hw still stops DMA, so proceed */
1915 /* refresh the beacon for AP or MESH mode */
1916 if (sc->opmode == NL80211_IFTYPE_AP ||
1917 sc->opmode == NL80211_IFTYPE_MESH_POINT)
1918 ath5k_beacon_update(sc->hw, vif);
1920 ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
1921 ath5k_hw_start_tx_dma(ah, sc->bhalq);
1922 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
1923 sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
1925 skb = ieee80211_get_buffered_bc(sc->hw, vif);
1927 ath5k_tx_queue(sc->hw, skb, sc->cabq);
1928 skb = ieee80211_get_buffered_bc(sc->hw, vif);
1935 * ath5k_beacon_update_timers - update beacon timers
1937 * @sc: struct ath5k_softc pointer we are operating on
1938 * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
1939 * beacon timer update based on the current HW TSF.
1941 * Calculate the next target beacon transmit time (TBTT) based on the timestamp
1942 * of a received beacon or the current local hardware TSF and write it to the
1943 * beacon timer registers.
1945 * This is called in a variety of situations, e.g. when a beacon is received,
1946 * when a TSF update has been detected, but also when an new IBSS is created or
1947 * when we otherwise know we have to update the timers, but we keep it in this
1948 * function to have it all together in one place.
1951 ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
1953 struct ath5k_hw *ah = sc->ah;
1954 u32 nexttbtt, intval, hw_tu, bc_tu;
1957 intval = sc->bintval & AR5K_BEACON_PERIOD;
1958 if (sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) {
1959 intval /= ATH_BCBUF; /* staggered multi-bss beacons */
1961 ATH5K_WARN(sc, "intval %u is too low, min 15\n",
1964 if (WARN_ON(!intval))
1967 /* beacon TSF converted to TU */
1968 bc_tu = TSF_TO_TU(bc_tsf);
1970 /* current TSF converted to TU */
1971 hw_tsf = ath5k_hw_get_tsf64(ah);
1972 hw_tu = TSF_TO_TU(hw_tsf);
1974 #define FUDGE AR5K_TUNE_SW_BEACON_RESP + 3
1975 /* We use FUDGE to make sure the next TBTT is ahead of the current TU.
1976 * Since we later substract AR5K_TUNE_SW_BEACON_RESP (10) in the timer
1977 * configuration we need to make sure it is bigger than that. */
1981 * no beacons received, called internally.
1982 * just need to refresh timers based on HW TSF.
1984 nexttbtt = roundup(hw_tu + FUDGE, intval);
1985 } else if (bc_tsf == 0) {
1987 * no beacon received, probably called by ath5k_reset_tsf().
1988 * reset TSF to start with 0.
1991 intval |= AR5K_BEACON_RESET_TSF;
1992 } else if (bc_tsf > hw_tsf) {
1994 * beacon received, SW merge happend but HW TSF not yet updated.
1995 * not possible to reconfigure timers yet, but next time we
1996 * receive a beacon with the same BSSID, the hardware will
1997 * automatically update the TSF and then we need to reconfigure
2000 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2001 "need to wait for HW TSF sync\n");
2005 * most important case for beacon synchronization between STA.
2007 * beacon received and HW TSF has been already updated by HW.
2008 * update next TBTT based on the TSF of the beacon, but make
2009 * sure it is ahead of our local TSF timer.
2011 nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
2015 sc->nexttbtt = nexttbtt;
2017 intval |= AR5K_BEACON_ENA;
2018 ath5k_hw_init_beacon(ah, nexttbtt, intval);
2021 * debugging output last in order to preserve the time critical aspect
2025 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2026 "reconfigured timers based on HW TSF\n");
2027 else if (bc_tsf == 0)
2028 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2029 "reset HW TSF and timers\n");
2031 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2032 "updated timers based on beacon TSF\n");
2034 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2035 "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
2036 (unsigned long long) bc_tsf,
2037 (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
2038 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
2039 intval & AR5K_BEACON_PERIOD,
2040 intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
2041 intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
2045 * ath5k_beacon_config - Configure the beacon queues and interrupts
2047 * @sc: struct ath5k_softc pointer we are operating on
2049 * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
2050 * interrupts to detect TSF updates only.
2053 ath5k_beacon_config(struct ath5k_softc *sc)
2055 struct ath5k_hw *ah = sc->ah;
2056 unsigned long flags;
2058 spin_lock_irqsave(&sc->block, flags);
2060 sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
2062 if (sc->enable_beacon) {
2064 * In IBSS mode we use a self-linked tx descriptor and let the
2065 * hardware send the beacons automatically. We have to load it
2067 * We use the SWBA interrupt only to keep track of the beacon
2068 * timers in order to detect automatic TSF updates.
2070 ath5k_beaconq_config(sc);
2072 sc->imask |= AR5K_INT_SWBA;
2074 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2075 if (ath5k_hw_hasveol(ah))
2076 ath5k_beacon_send(sc);
2078 ath5k_beacon_update_timers(sc, -1);
2080 ath5k_hw_stop_beacon_queue(sc->ah, sc->bhalq);
2083 ath5k_hw_set_imr(ah, sc->imask);
2085 spin_unlock_irqrestore(&sc->block, flags);
2088 static void ath5k_tasklet_beacon(unsigned long data)
2090 struct ath5k_softc *sc = (struct ath5k_softc *) data;
2093 * Software beacon alert--time to send a beacon.
2095 * In IBSS mode we use this interrupt just to
2096 * keep track of the next TBTT (target beacon
2097 * transmission time) in order to detect wether
2098 * automatic TSF updates happened.
2100 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2101 /* XXX: only if VEOL suppported */
2102 u64 tsf = ath5k_hw_get_tsf64(sc->ah);
2103 sc->nexttbtt += sc->bintval;
2104 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2105 "SWBA nexttbtt: %x hw_tu: %x "
2109 (unsigned long long) tsf);
2111 spin_lock(&sc->block);
2112 ath5k_beacon_send(sc);
2113 spin_unlock(&sc->block);
2118 /********************\
2119 * Interrupt handling *
2120 \********************/
2123 ath5k_intr_calibration_poll(struct ath5k_hw *ah)
2125 if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) &&
2126 !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL)) {
2127 /* run ANI only when full calibration is not active */
2128 ah->ah_cal_next_ani = jiffies +
2129 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI);
2130 tasklet_schedule(&ah->ah_sc->ani_tasklet);
2132 } else if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) {
2133 ah->ah_cal_next_full = jiffies +
2134 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL);
2135 tasklet_schedule(&ah->ah_sc->calib);
2137 /* we could use SWI to generate enough interrupts to meet our
2138 * calibration interval requirements, if necessary:
2139 * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */
2143 ath5k_intr(int irq, void *dev_id)
2145 struct ath5k_softc *sc = dev_id;
2146 struct ath5k_hw *ah = sc->ah;
2147 enum ath5k_int status;
2148 unsigned int counter = 1000;
2150 if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
2151 ((ath5k_get_bus_type(ah) != ATH_AHB) &&
2152 !ath5k_hw_is_intr_pending(ah))))
2156 ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */
2157 ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
2159 if (unlikely(status & AR5K_INT_FATAL)) {
2161 * Fatal errors are unrecoverable.
2162 * Typically these are caused by DMA errors.
2164 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2165 "fatal int, resetting\n");
2166 ieee80211_queue_work(sc->hw, &sc->reset_work);
2167 } else if (unlikely(status & AR5K_INT_RXORN)) {
2169 * Receive buffers are full. Either the bus is busy or
2170 * the CPU is not fast enough to process all received
2172 * Older chipsets need a reset to come out of this
2173 * condition, but we treat it as RX for newer chips.
2174 * We don't know exactly which versions need a reset -
2175 * this guess is copied from the HAL.
2177 sc->stats.rxorn_intr++;
2178 if (ah->ah_mac_srev < AR5K_SREV_AR5212) {
2179 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2180 "rx overrun, resetting\n");
2181 ieee80211_queue_work(sc->hw, &sc->reset_work);
2184 tasklet_schedule(&sc->rxtq);
2186 if (status & AR5K_INT_SWBA) {
2187 tasklet_hi_schedule(&sc->beacontq);
2189 if (status & AR5K_INT_RXEOL) {
2191 * NB: the hardware should re-read the link when
2192 * RXE bit is written, but it doesn't work at
2193 * least on older hardware revs.
2195 sc->stats.rxeol_intr++;
2197 if (status & AR5K_INT_TXURN) {
2198 /* bump tx trigger level */
2199 ath5k_hw_update_tx_triglevel(ah, true);
2201 if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
2202 tasklet_schedule(&sc->rxtq);
2203 if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
2204 | AR5K_INT_TXERR | AR5K_INT_TXEOL))
2205 tasklet_schedule(&sc->txtq);
2206 if (status & AR5K_INT_BMISS) {
2209 if (status & AR5K_INT_MIB) {
2210 sc->stats.mib_intr++;
2211 ath5k_hw_update_mib_counters(ah);
2212 ath5k_ani_mib_intr(ah);
2214 if (status & AR5K_INT_GPIO)
2215 tasklet_schedule(&sc->rf_kill.toggleq);
2219 if (ath5k_get_bus_type(ah) == ATH_AHB)
2222 } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
2224 if (unlikely(!counter))
2225 ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
2227 ath5k_intr_calibration_poll(ah);
2233 * Periodically recalibrate the PHY to account
2234 * for temperature/environment changes.
2237 ath5k_tasklet_calibrate(unsigned long data)
2239 struct ath5k_softc *sc = (void *)data;
2240 struct ath5k_hw *ah = sc->ah;
2242 /* Only full calibration for now */
2243 ah->ah_cal_mask |= AR5K_CALIBRATION_FULL;
2245 ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
2246 ieee80211_frequency_to_channel(sc->curchan->center_freq),
2247 sc->curchan->hw_value);
2249 if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) {
2251 * Rfgain is out of bounds, reset the chip
2252 * to load new gain values.
2254 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
2255 ieee80211_queue_work(sc->hw, &sc->reset_work);
2257 if (ath5k_hw_phy_calibrate(ah, sc->curchan))
2258 ATH5K_ERR(sc, "calibration of channel %u failed\n",
2259 ieee80211_frequency_to_channel(
2260 sc->curchan->center_freq));
2262 /* Noise floor calibration interrupts rx/tx path while I/Q calibration
2264 * TODO: We should stop TX here, so that it doesn't interfere.
2265 * Note that stopping the queues is not enough to stop TX! */
2266 if (time_is_before_eq_jiffies(ah->ah_cal_next_nf)) {
2267 ah->ah_cal_next_nf = jiffies +
2268 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_NF);
2269 ath5k_hw_update_noise_floor(ah);
2272 ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL;
2277 ath5k_tasklet_ani(unsigned long data)
2279 struct ath5k_softc *sc = (void *)data;
2280 struct ath5k_hw *ah = sc->ah;
2282 ah->ah_cal_mask |= AR5K_CALIBRATION_ANI;
2283 ath5k_ani_calibration(ah);
2284 ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI;
2289 ath5k_tx_complete_poll_work(struct work_struct *work)
2291 struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
2292 tx_complete_work.work);
2293 struct ath5k_txq *txq;
2295 bool needreset = false;
2297 mutex_lock(&sc->lock);
2299 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
2300 if (sc->txqs[i].setup) {
2302 spin_lock_bh(&txq->lock);
2303 if (txq->txq_len > 1) {
2304 if (txq->txq_poll_mark) {
2305 ATH5K_DBG(sc, ATH5K_DEBUG_XMIT,
2306 "TX queue stuck %d\n",
2310 spin_unlock_bh(&txq->lock);
2313 txq->txq_poll_mark = true;
2316 spin_unlock_bh(&txq->lock);
2321 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2322 "TX queues stuck, resetting\n");
2323 ath5k_reset(sc, NULL, true);
2326 mutex_unlock(&sc->lock);
2328 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2329 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
2333 /*************************\
2334 * Initialization routines *
2335 \*************************/
2338 ath5k_init_softc(struct ath5k_softc *sc, const struct ath_bus_ops *bus_ops)
2340 struct ieee80211_hw *hw = sc->hw;
2341 struct ath_common *common;
2345 /* Initialize driver private data */
2346 SET_IEEE80211_DEV(hw, sc->dev);
2347 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
2348 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
2349 IEEE80211_HW_SIGNAL_DBM |
2350 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2352 hw->wiphy->interface_modes =
2353 BIT(NL80211_IFTYPE_AP) |
2354 BIT(NL80211_IFTYPE_STATION) |
2355 BIT(NL80211_IFTYPE_ADHOC) |
2356 BIT(NL80211_IFTYPE_MESH_POINT);
2358 /* both antennas can be configured as RX or TX */
2359 hw->wiphy->available_antennas_tx = 0x3;
2360 hw->wiphy->available_antennas_rx = 0x3;
2362 hw->extra_tx_headroom = 2;
2363 hw->channel_change_time = 5000;
2366 * Mark the device as detached to avoid processing
2367 * interrupts until setup is complete.
2369 __set_bit(ATH_STAT_INVALID, sc->status);
2371 sc->opmode = NL80211_IFTYPE_STATION;
2373 mutex_init(&sc->lock);
2374 spin_lock_init(&sc->rxbuflock);
2375 spin_lock_init(&sc->txbuflock);
2376 spin_lock_init(&sc->block);
2379 /* Setup interrupt handler */
2380 ret = request_irq(sc->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
2382 ATH5K_ERR(sc, "request_irq failed\n");
2386 /* If we passed the test, malloc an ath5k_hw struct */
2387 sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL);
2390 ATH5K_ERR(sc, "out of memory\n");
2395 sc->ah->ah_iobase = sc->iobase;
2396 common = ath5k_hw_common(sc->ah);
2397 common->ops = &ath5k_common_ops;
2398 common->bus_ops = bus_ops;
2399 common->ah = sc->ah;
2404 * Cache line size is used to size and align various
2405 * structures used to communicate with the hardware.
2407 ath5k_read_cachesize(common, &csz);
2408 common->cachelsz = csz << 2; /* convert to bytes */
2410 spin_lock_init(&common->cc_lock);
2412 /* Initialize device */
2413 ret = ath5k_hw_init(sc);
2417 /* set up multi-rate retry capabilities */
2418 if (sc->ah->ah_version == AR5K_AR5212) {
2420 hw->max_rate_tries = 11;
2423 hw->vif_data_size = sizeof(struct ath5k_vif);
2425 /* Finish private driver data initialization */
2426 ret = ath5k_init(hw);
2430 ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
2431 ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
2432 sc->ah->ah_mac_srev,
2433 sc->ah->ah_phy_revision);
2435 if (!sc->ah->ah_single_chip) {
2436 /* Single chip radio (!RF5111) */
2437 if (sc->ah->ah_radio_5ghz_revision &&
2438 !sc->ah->ah_radio_2ghz_revision) {
2439 /* No 5GHz support -> report 2GHz radio */
2440 if (!test_bit(AR5K_MODE_11A,
2441 sc->ah->ah_capabilities.cap_mode)) {
2442 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
2443 ath5k_chip_name(AR5K_VERSION_RAD,
2444 sc->ah->ah_radio_5ghz_revision),
2445 sc->ah->ah_radio_5ghz_revision);
2446 /* No 2GHz support (5110 and some
2447 * 5Ghz only cards) -> report 5Ghz radio */
2448 } else if (!test_bit(AR5K_MODE_11B,
2449 sc->ah->ah_capabilities.cap_mode)) {
2450 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
2451 ath5k_chip_name(AR5K_VERSION_RAD,
2452 sc->ah->ah_radio_5ghz_revision),
2453 sc->ah->ah_radio_5ghz_revision);
2454 /* Multiband radio */
2456 ATH5K_INFO(sc, "RF%s multiband radio found"
2458 ath5k_chip_name(AR5K_VERSION_RAD,
2459 sc->ah->ah_radio_5ghz_revision),
2460 sc->ah->ah_radio_5ghz_revision);
2463 /* Multi chip radio (RF5111 - RF2111) ->
2464 * report both 2GHz/5GHz radios */
2465 else if (sc->ah->ah_radio_5ghz_revision &&
2466 sc->ah->ah_radio_2ghz_revision){
2467 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
2468 ath5k_chip_name(AR5K_VERSION_RAD,
2469 sc->ah->ah_radio_5ghz_revision),
2470 sc->ah->ah_radio_5ghz_revision);
2471 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
2472 ath5k_chip_name(AR5K_VERSION_RAD,
2473 sc->ah->ah_radio_2ghz_revision),
2474 sc->ah->ah_radio_2ghz_revision);
2478 ath5k_debug_init_device(sc);
2480 /* ready to process interrupts */
2481 __clear_bit(ATH_STAT_INVALID, sc->status);
2485 ath5k_hw_deinit(sc->ah);
2489 free_irq(sc->irq, sc);
2495 ath5k_stop_locked(struct ath5k_softc *sc)
2497 struct ath5k_hw *ah = sc->ah;
2499 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
2500 test_bit(ATH_STAT_INVALID, sc->status));
2503 * Shutdown the hardware and driver:
2504 * stop output from above
2505 * disable interrupts
2507 * turn off the radio
2508 * clear transmit machinery
2509 * clear receive machinery
2510 * drain and release tx queues
2511 * reclaim beacon resources
2512 * power down hardware
2514 * Note that some of this work is not possible if the
2515 * hardware is gone (invalid).
2517 ieee80211_stop_queues(sc->hw);
2519 if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2521 ath5k_hw_set_imr(ah, 0);
2522 synchronize_irq(sc->irq);
2524 ath5k_hw_dma_stop(ah);
2525 ath5k_drain_tx_buffs(sc);
2526 ath5k_hw_phy_disable(ah);
2533 ath5k_init_hw(struct ath5k_softc *sc)
2535 struct ath5k_hw *ah = sc->ah;
2536 struct ath_common *common = ath5k_hw_common(ah);
2539 mutex_lock(&sc->lock);
2541 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
2544 * Stop anything previously setup. This is safe
2545 * no matter this is the first time through or not.
2547 ath5k_stop_locked(sc);
2550 * The basic interface to setting the hardware in a good
2551 * state is ``reset''. On return the hardware is known to
2552 * be powered up and with interrupts disabled. This must
2553 * be followed by initialization of the appropriate bits
2554 * and then setup of the interrupt mask.
2556 sc->curchan = sc->hw->conf.channel;
2557 sc->curband = &sc->sbands[sc->curchan->band];
2558 sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
2559 AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
2560 AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB;
2562 ret = ath5k_reset(sc, NULL, false);
2566 ath5k_rfkill_hw_start(ah);
2569 * Reset the key cache since some parts do not reset the
2570 * contents on initial power up or resume from suspend.
2572 for (i = 0; i < common->keymax; i++)
2573 ath_hw_keyreset(common, (u16) i);
2575 /* Use higher rates for acks instead of base
2577 ah->ah_ack_bitrate_high = true;
2579 for (i = 0; i < ARRAY_SIZE(sc->bslot); i++)
2580 sc->bslot[i] = NULL;
2585 mutex_unlock(&sc->lock);
2587 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2588 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
2593 static void stop_tasklets(struct ath5k_softc *sc)
2595 tasklet_kill(&sc->rxtq);
2596 tasklet_kill(&sc->txtq);
2597 tasklet_kill(&sc->calib);
2598 tasklet_kill(&sc->beacontq);
2599 tasklet_kill(&sc->ani_tasklet);
2603 * Stop the device, grabbing the top-level lock to protect
2604 * against concurrent entry through ath5k_init (which can happen
2605 * if another thread does a system call and the thread doing the
2606 * stop is preempted).
2609 ath5k_stop_hw(struct ath5k_softc *sc)
2613 mutex_lock(&sc->lock);
2614 ret = ath5k_stop_locked(sc);
2615 if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
2617 * Don't set the card in full sleep mode!
2619 * a) When the device is in this state it must be carefully
2620 * woken up or references to registers in the PCI clock
2621 * domain may freeze the bus (and system). This varies
2622 * by chip and is mostly an issue with newer parts
2623 * (madwifi sources mentioned srev >= 0x78) that go to
2624 * sleep more quickly.
2626 * b) On older chips full sleep results a weird behaviour
2627 * during wakeup. I tested various cards with srev < 0x78
2628 * and they don't wake up after module reload, a second
2629 * module reload is needed to bring the card up again.
2631 * Until we figure out what's going on don't enable
2632 * full chip reset on any chip (this is what Legacy HAL
2633 * and Sam's HAL do anyway). Instead Perform a full reset
2634 * on the device (same as initial state after attach) and
2635 * leave it idle (keep MAC/BB on warm reset) */
2636 ret = ath5k_hw_on_hold(sc->ah);
2638 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2639 "putting device to sleep\n");
2643 mutex_unlock(&sc->lock);
2647 cancel_delayed_work_sync(&sc->tx_complete_work);
2649 ath5k_rfkill_hw_stop(sc->ah);
2655 * Reset the hardware. If chan is not NULL, then also pause rx/tx
2656 * and change to the given channel.
2658 * This should be called with sc->lock.
2661 ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan,
2664 struct ath5k_hw *ah = sc->ah;
2665 struct ath_common *common = ath5k_hw_common(ah);
2668 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
2670 ath5k_hw_set_imr(ah, 0);
2671 synchronize_irq(sc->irq);
2674 /* Save ani mode and disable ANI durring
2675 * reset. If we don't we might get false
2676 * PHY error interrupts. */
2677 ani_mode = ah->ah_sc->ani_state.ani_mode;
2678 ath5k_ani_init(ah, ATH5K_ANI_MODE_OFF);
2680 /* We are going to empty hw queues
2681 * so we should also free any remaining
2683 ath5k_drain_tx_buffs(sc);
2686 sc->curband = &sc->sbands[chan->band];
2688 ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, chan != NULL,
2691 ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret);
2695 ret = ath5k_rx_start(sc);
2697 ATH5K_ERR(sc, "can't start recv logic\n");
2701 ath5k_ani_init(ah, ani_mode);
2703 ah->ah_cal_next_full = jiffies;
2704 ah->ah_cal_next_ani = jiffies;
2705 ah->ah_cal_next_nf = jiffies;
2706 ewma_init(&ah->ah_beacon_rssi_avg, 1024, 8);
2708 /* clear survey data and cycle counters */
2709 memset(&sc->survey, 0, sizeof(sc->survey));
2710 spin_lock_bh(&common->cc_lock);
2711 ath_hw_cycle_counters_update(common);
2712 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
2713 memset(&common->cc_ani, 0, sizeof(common->cc_ani));
2714 spin_unlock_bh(&common->cc_lock);
2717 * Change channels and update the h/w rate map if we're switching;
2718 * e.g. 11a to 11b/g.
2720 * We may be doing a reset in response to an ioctl that changes the
2721 * channel so update any state that might change as a result.
2725 /* ath5k_chan_change(sc, c); */
2727 ath5k_beacon_config(sc);
2728 /* intrs are enabled by ath5k_beacon_config */
2730 ieee80211_wake_queues(sc->hw);
2737 static void ath5k_reset_work(struct work_struct *work)
2739 struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
2742 mutex_lock(&sc->lock);
2743 ath5k_reset(sc, NULL, true);
2744 mutex_unlock(&sc->lock);
2748 ath5k_init(struct ieee80211_hw *hw)
2751 struct ath5k_softc *sc = hw->priv;
2752 struct ath5k_hw *ah = sc->ah;
2753 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
2754 struct ath5k_txq *txq;
2755 u8 mac[ETH_ALEN] = {};
2760 * Check if the MAC has multi-rate retry support.
2761 * We do this by trying to setup a fake extended
2762 * descriptor. MACs that don't have support will
2763 * return false w/o doing anything. MACs that do
2764 * support it will return true w/o doing anything.
2766 ret = ath5k_hw_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
2771 __set_bit(ATH_STAT_MRRETRY, sc->status);
2774 * Collect the channel list. The 802.11 layer
2775 * is resposible for filtering this list based
2776 * on settings like the phy mode and regulatory
2777 * domain restrictions.
2779 ret = ath5k_setup_bands(hw);
2781 ATH5K_ERR(sc, "can't get channels\n");
2785 /* NB: setup here so ath5k_rate_update is happy */
2786 if (test_bit(AR5K_MODE_11A, ah->ah_modes))
2787 ath5k_setcurmode(sc, AR5K_MODE_11A);
2789 ath5k_setcurmode(sc, AR5K_MODE_11B);
2792 * Allocate tx+rx descriptors and populate the lists.
2794 ret = ath5k_desc_alloc(sc);
2796 ATH5K_ERR(sc, "can't allocate descriptors\n");
2801 * Allocate hardware transmit queues: one queue for
2802 * beacon frames and one data queue for each QoS
2803 * priority. Note that hw functions handle resetting
2804 * these queues at the needed time.
2806 ret = ath5k_beaconq_setup(ah);
2808 ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
2812 sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0);
2813 if (IS_ERR(sc->cabq)) {
2814 ATH5K_ERR(sc, "can't setup cab queue\n");
2815 ret = PTR_ERR(sc->cabq);
2819 /* 5211 and 5212 usually support 10 queues but we better rely on the
2820 * capability information */
2821 if (ah->ah_capabilities.cap_queues.q_tx_num >= 6) {
2822 /* This order matches mac80211's queue priority, so we can
2823 * directly use the mac80211 queue number without any mapping */
2824 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VO);
2826 ATH5K_ERR(sc, "can't setup xmit queue\n");
2830 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VI);
2832 ATH5K_ERR(sc, "can't setup xmit queue\n");
2836 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
2838 ATH5K_ERR(sc, "can't setup xmit queue\n");
2842 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
2844 ATH5K_ERR(sc, "can't setup xmit queue\n");
2850 /* older hardware (5210) can only support one data queue */
2851 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
2853 ATH5K_ERR(sc, "can't setup xmit queue\n");
2860 tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
2861 tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
2862 tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc);
2863 tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc);
2864 tasklet_init(&sc->ani_tasklet, ath5k_tasklet_ani, (unsigned long)sc);
2866 INIT_WORK(&sc->reset_work, ath5k_reset_work);
2867 INIT_DELAYED_WORK(&sc->tx_complete_work, ath5k_tx_complete_poll_work);
2869 ret = ath5k_eeprom_read_mac(ah, mac);
2871 ATH5K_ERR(sc, "unable to read address from EEPROM\n");
2875 SET_IEEE80211_PERM_ADDR(hw, mac);
2876 memcpy(&sc->lladdr, mac, ETH_ALEN);
2877 /* All MAC address bits matter for ACKs */
2878 ath5k_update_bssid_mask_and_opmode(sc, NULL);
2880 regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain;
2881 ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier);
2883 ATH5K_ERR(sc, "can't initialize regulatory system\n");
2887 ret = ieee80211_register_hw(hw);
2889 ATH5K_ERR(sc, "can't register ieee80211 hw\n");
2893 if (!ath_is_world_regd(regulatory))
2894 regulatory_hint(hw->wiphy, regulatory->alpha2);
2896 ath5k_init_leds(sc);
2898 ath5k_sysfs_register(sc);
2902 ath5k_txq_release(sc);
2904 ath5k_hw_release_tx_queue(ah, sc->bhalq);
2906 ath5k_desc_free(sc);
2912 ath5k_deinit_softc(struct ath5k_softc *sc)
2914 struct ieee80211_hw *hw = sc->hw;
2917 * NB: the order of these is important:
2918 * o call the 802.11 layer before detaching ath5k_hw to
2919 * ensure callbacks into the driver to delete global
2920 * key cache entries can be handled
2921 * o reclaim the tx queue data structures after calling
2922 * the 802.11 layer as we'll get called back to reclaim
2923 * node state and potentially want to use them
2924 * o to cleanup the tx queues the hal is called, so detach
2926 * XXX: ??? detach ath5k_hw ???
2927 * Other than that, it's straightforward...
2929 ath5k_debug_finish_device(sc);
2930 ieee80211_unregister_hw(hw);
2931 ath5k_desc_free(sc);
2932 ath5k_txq_release(sc);
2933 ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
2934 ath5k_unregister_leds(sc);
2936 ath5k_sysfs_unregister(sc);
2938 * NB: can't reclaim these until after ieee80211_ifdetach
2939 * returns because we'll get called back to reclaim node
2940 * state and potentially want to use them.
2942 ath5k_hw_deinit(sc->ah);
2943 free_irq(sc->irq, sc);
2947 ath_any_vif_assoc(struct ath5k_softc *sc)
2949 struct ath_vif_iter_data iter_data;
2950 iter_data.hw_macaddr = NULL;
2951 iter_data.any_assoc = false;
2952 iter_data.need_set_hw_addr = false;
2953 iter_data.found_active = true;
2955 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath_vif_iter,
2957 return iter_data.any_assoc;
2961 set_beacon_filter(struct ieee80211_hw *hw, bool enable)
2963 struct ath5k_softc *sc = hw->priv;
2964 struct ath5k_hw *ah = sc->ah;
2966 rfilt = ath5k_hw_get_rx_filter(ah);
2968 rfilt |= AR5K_RX_FILTER_BEACON;
2970 rfilt &= ~AR5K_RX_FILTER_BEACON;
2971 ath5k_hw_set_rx_filter(ah, rfilt);
2972 sc->filter_flags = rfilt;