2 * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
3 * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
4 * Copyright (c) 2007-2008 Matthew W. S. Bell <mentor@madwifi.org>
5 * Copyright (c) 2007-2008 Luis Rodriguez <mcgrof@winlab.rutgers.edu>
6 * Copyright (c) 2007-2008 Pavel Roskin <proski@gnu.org>
7 * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
9 * Permission to use, copy, modify, and distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 /*********************************\
24 * Protocol Control Unit Functions *
25 \*********************************/
27 #include <asm/unaligned.h>
39 * ath5k_hw_set_opmode - Set PCU operating mode
41 * @ah: The &struct ath5k_hw
43 * Initialize PCU for the various operating modes (AP/STA etc)
45 * NOTE: ah->ah_op_mode must be set before calling this.
47 int ath5k_hw_set_opmode(struct ath5k_hw *ah)
49 struct ath_common *common = ath5k_hw_common(ah);
50 u32 pcu_reg, beacon_reg, low_id, high_id;
53 /* Preserve rest settings */
54 pcu_reg = ath5k_hw_reg_read(ah, AR5K_STA_ID1) & 0xffff0000;
55 pcu_reg &= ~(AR5K_STA_ID1_ADHOC | AR5K_STA_ID1_AP
56 | AR5K_STA_ID1_KEYSRCH_MODE
57 | (ah->ah_version == AR5K_AR5210 ?
58 (AR5K_STA_ID1_PWR_SV | AR5K_STA_ID1_NO_PSPOLL) : 0));
62 ATH5K_TRACE(ah->ah_sc);
64 switch (ah->ah_op_mode) {
65 case NL80211_IFTYPE_ADHOC:
66 pcu_reg |= AR5K_STA_ID1_ADHOC | AR5K_STA_ID1_KEYSRCH_MODE;
67 beacon_reg |= AR5K_BCR_ADHOC;
68 if (ah->ah_version == AR5K_AR5210)
69 pcu_reg |= AR5K_STA_ID1_NO_PSPOLL;
71 AR5K_REG_ENABLE_BITS(ah, AR5K_CFG, AR5K_CFG_IBSS);
74 case NL80211_IFTYPE_AP:
75 case NL80211_IFTYPE_MESH_POINT:
76 pcu_reg |= AR5K_STA_ID1_AP | AR5K_STA_ID1_KEYSRCH_MODE;
77 beacon_reg |= AR5K_BCR_AP;
78 if (ah->ah_version == AR5K_AR5210)
79 pcu_reg |= AR5K_STA_ID1_NO_PSPOLL;
81 AR5K_REG_DISABLE_BITS(ah, AR5K_CFG, AR5K_CFG_IBSS);
84 case NL80211_IFTYPE_STATION:
85 pcu_reg |= AR5K_STA_ID1_KEYSRCH_MODE
86 | (ah->ah_version == AR5K_AR5210 ?
87 AR5K_STA_ID1_PWR_SV : 0);
88 case NL80211_IFTYPE_MONITOR:
89 pcu_reg |= AR5K_STA_ID1_KEYSRCH_MODE
90 | (ah->ah_version == AR5K_AR5210 ?
91 AR5K_STA_ID1_NO_PSPOLL : 0);
101 low_id = get_unaligned_le32(common->macaddr);
102 high_id = get_unaligned_le16(common->macaddr + 4);
103 ath5k_hw_reg_write(ah, low_id, AR5K_STA_ID0);
104 ath5k_hw_reg_write(ah, pcu_reg | high_id, AR5K_STA_ID1);
107 * Set Beacon Control Register on 5210
109 if (ah->ah_version == AR5K_AR5210)
110 ath5k_hw_reg_write(ah, beacon_reg, AR5K_BCR);
116 * ath5k_hw_update - Update mib counters (mac layer statistics)
118 * @ah: The &struct ath5k_hw
119 * @stats: The &struct ieee80211_low_level_stats we use to track
120 * statistics on the driver
122 * Reads MIB counters from PCU and updates sw statistics. Must be
123 * called after a MIB interrupt.
125 void ath5k_hw_update_mib_counters(struct ath5k_hw *ah,
126 struct ieee80211_low_level_stats *stats)
128 ATH5K_TRACE(ah->ah_sc);
131 stats->dot11ACKFailureCount += ath5k_hw_reg_read(ah, AR5K_ACK_FAIL);
132 stats->dot11RTSFailureCount += ath5k_hw_reg_read(ah, AR5K_RTS_FAIL);
133 stats->dot11RTSSuccessCount += ath5k_hw_reg_read(ah, AR5K_RTS_OK);
134 stats->dot11FCSErrorCount += ath5k_hw_reg_read(ah, AR5K_FCS_FAIL);
136 /* XXX: Should we use this to track beacon count ?
137 * -we read it anyway to clear the register */
138 ath5k_hw_reg_read(ah, AR5K_BEACON_CNT);
140 /* Reset profile count registers on 5212*/
141 if (ah->ah_version == AR5K_AR5212) {
142 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_TX);
143 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_RX);
144 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_RXCLR);
145 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_CYCLE);
148 /* TODO: Handle ANI stats */
152 * ath5k_hw_set_ack_bitrate - set bitrate for ACKs
154 * @ah: The &struct ath5k_hw
155 * @high: Flag to determine if we want to use high transmition rate
158 * If high flag is set, we tell hw to use a set of control rates based on
159 * the current transmition rate (check out control_rates array inside reset.c).
160 * If not hw just uses the lowest rate available for the current modulation
161 * scheme being used (1Mbit for CCK and 6Mbits for OFDM).
163 void ath5k_hw_set_ack_bitrate_high(struct ath5k_hw *ah, bool high)
165 if (ah->ah_version != AR5K_AR5212)
168 u32 val = AR5K_STA_ID1_BASE_RATE_11B | AR5K_STA_ID1_ACKCTS_6MB;
170 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1, val);
172 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, val);
182 * ath5k_hw_het_ack_timeout - Get ACK timeout from PCU in usec
184 * @ah: The &struct ath5k_hw
186 unsigned int ath5k_hw_get_ack_timeout(struct ath5k_hw *ah)
188 ATH5K_TRACE(ah->ah_sc);
190 return ath5k_hw_clocktoh(ah, AR5K_REG_MS(ath5k_hw_reg_read(ah,
191 AR5K_TIME_OUT), AR5K_TIME_OUT_ACK));
195 * ath5k_hw_set_ack_timeout - Set ACK timeout on PCU
197 * @ah: The &struct ath5k_hw
198 * @timeout: Timeout in usec
200 int ath5k_hw_set_ack_timeout(struct ath5k_hw *ah, unsigned int timeout)
202 ATH5K_TRACE(ah->ah_sc);
203 if (ath5k_hw_clocktoh(ah, AR5K_REG_MS(0xffffffff, AR5K_TIME_OUT_ACK))
207 AR5K_REG_WRITE_BITS(ah, AR5K_TIME_OUT, AR5K_TIME_OUT_ACK,
208 ath5k_hw_htoclock(ah, timeout));
214 * ath5k_hw_get_cts_timeout - Get CTS timeout from PCU in usec
216 * @ah: The &struct ath5k_hw
218 unsigned int ath5k_hw_get_cts_timeout(struct ath5k_hw *ah)
220 ATH5K_TRACE(ah->ah_sc);
221 return ath5k_hw_clocktoh(ah, AR5K_REG_MS(ath5k_hw_reg_read(ah,
222 AR5K_TIME_OUT), AR5K_TIME_OUT_CTS));
226 * ath5k_hw_set_cts_timeout - Set CTS timeout on PCU
228 * @ah: The &struct ath5k_hw
229 * @timeout: Timeout in usec
231 int ath5k_hw_set_cts_timeout(struct ath5k_hw *ah, unsigned int timeout)
233 ATH5K_TRACE(ah->ah_sc);
234 if (ath5k_hw_clocktoh(ah, AR5K_REG_MS(0xffffffff, AR5K_TIME_OUT_CTS))
238 AR5K_REG_WRITE_BITS(ah, AR5K_TIME_OUT, AR5K_TIME_OUT_CTS,
239 ath5k_hw_htoclock(ah, timeout));
245 * ath5k_hw_htoclock - Translate usec to hw clock units
247 * @ah: The &struct ath5k_hw
248 * @usec: value in microseconds
250 unsigned int ath5k_hw_htoclock(struct ath5k_hw *ah, unsigned int usec)
252 return usec * ath5k_hw_get_clockrate(ah);
256 * ath5k_hw_clocktoh - Translate hw clock units to usec
257 * @clock: value in hw clock units
259 unsigned int ath5k_hw_clocktoh(struct ath5k_hw *ah, unsigned int clock)
261 return clock / ath5k_hw_get_clockrate(ah);
265 * ath5k_hw_get_clockrate - Get the clock rate for current mode
267 * @ah: The &struct ath5k_hw
269 unsigned int ath5k_hw_get_clockrate(struct ath5k_hw *ah)
271 struct ieee80211_channel *channel = ah->ah_current_channel;
274 if (channel->hw_value & CHANNEL_5GHZ)
275 clock = 40; /* 802.11a */
276 else if (channel->hw_value & CHANNEL_CCK)
277 clock = 22; /* 802.11b */
279 clock = 44; /* 802.11g */
281 /* Clock rate in turbo modes is twice the normal rate */
282 if (channel->hw_value & CHANNEL_TURBO)
289 * ath5k_hw_get_default_slottime - Get the default slot time for current mode
291 * @ah: The &struct ath5k_hw
293 unsigned int ath5k_hw_get_default_slottime(struct ath5k_hw *ah)
295 struct ieee80211_channel *channel = ah->ah_current_channel;
297 if (channel->hw_value & CHANNEL_TURBO)
298 return 6; /* both turbo modes */
300 if (channel->hw_value & CHANNEL_CCK)
301 return 20; /* 802.11b */
303 return 9; /* 802.11 a/g */
307 * ath5k_hw_get_default_sifs - Get the default SIFS for current mode
309 * @ah: The &struct ath5k_hw
311 unsigned int ath5k_hw_get_default_sifs(struct ath5k_hw *ah)
313 struct ieee80211_channel *channel = ah->ah_current_channel;
315 if (channel->hw_value & CHANNEL_TURBO)
316 return 8; /* both turbo modes */
318 if (channel->hw_value & CHANNEL_5GHZ)
319 return 16; /* 802.11a */
321 return 10; /* 802.11 b/g */
325 * ath5k_hw_set_lladdr - Set station id
327 * @ah: The &struct ath5k_hw
328 * @mac: The card's mac address
330 * Set station id on hw using the provided mac address
332 int ath5k_hw_set_lladdr(struct ath5k_hw *ah, const u8 *mac)
334 struct ath_common *common = ath5k_hw_common(ah);
338 ATH5K_TRACE(ah->ah_sc);
339 /* Set new station ID */
340 memcpy(common->macaddr, mac, ETH_ALEN);
342 pcu_reg = ath5k_hw_reg_read(ah, AR5K_STA_ID1) & 0xffff0000;
344 low_id = get_unaligned_le32(mac);
345 high_id = get_unaligned_le16(mac + 4);
347 ath5k_hw_reg_write(ah, low_id, AR5K_STA_ID0);
348 ath5k_hw_reg_write(ah, pcu_reg | high_id, AR5K_STA_ID1);
354 * ath5k_hw_set_associd - Set BSSID for association
356 * @ah: The &struct ath5k_hw
358 * @assoc_id: Assoc id
360 * Sets the BSSID which trigers the "SME Join" operation
362 void ath5k_hw_set_associd(struct ath5k_hw *ah)
364 struct ath_common *common = ath5k_hw_common(ah);
368 * Set simple BSSID mask on 5212
370 if (ah->ah_version == AR5K_AR5212)
371 ath_hw_setbssidmask(common);
374 * Set BSSID which triggers the "SME Join" operation
376 ath5k_hw_reg_write(ah,
377 get_unaligned_le32(common->curbssid),
379 ath5k_hw_reg_write(ah,
380 get_unaligned_le16(common->curbssid + 4) |
381 ((common->curaid & 0x3fff) << AR5K_BSS_ID1_AID_S),
384 if (common->curaid == 0) {
385 ath5k_hw_disable_pspoll(ah);
389 AR5K_REG_WRITE_BITS(ah, AR5K_BEACON, AR5K_BEACON_TIM,
390 tim_offset ? tim_offset + 4 : 0);
392 ath5k_hw_enable_pspoll(ah, NULL, 0);
395 void ath5k_hw_set_bssid_mask(struct ath5k_hw *ah, const u8 *mask)
397 struct ath_common *common = ath5k_hw_common(ah);
398 ATH5K_TRACE(ah->ah_sc);
400 /* Cache bssid mask so that we can restore it
402 memcpy(common->bssidmask, mask, ETH_ALEN);
403 if (ah->ah_version == AR5K_AR5212)
404 ath_hw_setbssidmask(common);
412 * ath5k_hw_start_rx_pcu - Start RX engine
414 * @ah: The &struct ath5k_hw
416 * Starts RX engine on PCU so that hw can process RXed frames
419 * NOTE: RX DMA should be already enabled using ath5k_hw_start_rx_dma
420 * TODO: Init ANI here
422 void ath5k_hw_start_rx_pcu(struct ath5k_hw *ah)
424 ATH5K_TRACE(ah->ah_sc);
425 AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW, AR5K_DIAG_SW_DIS_RX);
429 * at5k_hw_stop_rx_pcu - Stop RX engine
431 * @ah: The &struct ath5k_hw
433 * Stops RX engine on PCU
435 * TODO: Detach ANI here
437 void ath5k_hw_stop_rx_pcu(struct ath5k_hw *ah)
439 ATH5K_TRACE(ah->ah_sc);
440 AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW, AR5K_DIAG_SW_DIS_RX);
444 * Set multicast filter
446 void ath5k_hw_set_mcast_filter(struct ath5k_hw *ah, u32 filter0, u32 filter1)
448 ATH5K_TRACE(ah->ah_sc);
449 /* Set the multicat filter */
450 ath5k_hw_reg_write(ah, filter0, AR5K_MCAST_FILTER0);
451 ath5k_hw_reg_write(ah, filter1, AR5K_MCAST_FILTER1);
455 * Set multicast filter by index
457 int ath5k_hw_set_mcast_filter_idx(struct ath5k_hw *ah, u32 index)
460 ATH5K_TRACE(ah->ah_sc);
463 else if (index >= 32)
464 AR5K_REG_ENABLE_BITS(ah, AR5K_MCAST_FILTER1,
465 (1 << (index - 32)));
467 AR5K_REG_ENABLE_BITS(ah, AR5K_MCAST_FILTER0, (1 << index));
473 * Clear Multicast filter by index
475 int ath5k_hw_clear_mcast_filter_idx(struct ath5k_hw *ah, u32 index)
478 ATH5K_TRACE(ah->ah_sc);
481 else if (index >= 32)
482 AR5K_REG_DISABLE_BITS(ah, AR5K_MCAST_FILTER1,
483 (1 << (index - 32)));
485 AR5K_REG_DISABLE_BITS(ah, AR5K_MCAST_FILTER0, (1 << index));
491 * ath5k_hw_get_rx_filter - Get current rx filter
493 * @ah: The &struct ath5k_hw
495 * Returns the RX filter by reading rx filter and
496 * phy error filter registers. RX filter is used
497 * to set the allowed frame types that PCU will accept
498 * and pass to the driver. For a list of frame types
501 u32 ath5k_hw_get_rx_filter(struct ath5k_hw *ah)
503 u32 data, filter = 0;
505 ATH5K_TRACE(ah->ah_sc);
506 filter = ath5k_hw_reg_read(ah, AR5K_RX_FILTER);
508 /*Radar detection for 5212*/
509 if (ah->ah_version == AR5K_AR5212) {
510 data = ath5k_hw_reg_read(ah, AR5K_PHY_ERR_FIL);
512 if (data & AR5K_PHY_ERR_FIL_RADAR)
513 filter |= AR5K_RX_FILTER_RADARERR;
514 if (data & (AR5K_PHY_ERR_FIL_OFDM | AR5K_PHY_ERR_FIL_CCK))
515 filter |= AR5K_RX_FILTER_PHYERR;
522 * ath5k_hw_set_rx_filter - Set rx filter
524 * @ah: The &struct ath5k_hw
525 * @filter: RX filter mask (see reg.h)
527 * Sets RX filter register and also handles PHY error filter
528 * register on 5212 and newer chips so that we have proper PHY
531 void ath5k_hw_set_rx_filter(struct ath5k_hw *ah, u32 filter)
535 ATH5K_TRACE(ah->ah_sc);
537 /* Set PHY error filter register on 5212*/
538 if (ah->ah_version == AR5K_AR5212) {
539 if (filter & AR5K_RX_FILTER_RADARERR)
540 data |= AR5K_PHY_ERR_FIL_RADAR;
541 if (filter & AR5K_RX_FILTER_PHYERR)
542 data |= AR5K_PHY_ERR_FIL_OFDM | AR5K_PHY_ERR_FIL_CCK;
546 * The AR5210 uses promiscous mode to detect radar activity
548 if (ah->ah_version == AR5K_AR5210 &&
549 (filter & AR5K_RX_FILTER_RADARERR)) {
550 filter &= ~AR5K_RX_FILTER_RADARERR;
551 filter |= AR5K_RX_FILTER_PROM;
554 /*Zero length DMA (phy error reporting) */
556 AR5K_REG_ENABLE_BITS(ah, AR5K_RXCFG, AR5K_RXCFG_ZLFDMA);
558 AR5K_REG_DISABLE_BITS(ah, AR5K_RXCFG, AR5K_RXCFG_ZLFDMA);
560 /*Write RX Filter register*/
561 ath5k_hw_reg_write(ah, filter & 0xff, AR5K_RX_FILTER);
563 /*Write PHY error filter register on 5212*/
564 if (ah->ah_version == AR5K_AR5212)
565 ath5k_hw_reg_write(ah, data, AR5K_PHY_ERR_FIL);
575 * ath5k_hw_get_tsf32 - Get a 32bit TSF
577 * @ah: The &struct ath5k_hw
579 * Returns lower 32 bits of current TSF
581 u32 ath5k_hw_get_tsf32(struct ath5k_hw *ah)
583 ATH5K_TRACE(ah->ah_sc);
584 return ath5k_hw_reg_read(ah, AR5K_TSF_L32);
588 * ath5k_hw_get_tsf64 - Get the full 64bit TSF
590 * @ah: The &struct ath5k_hw
592 * Returns the current TSF
594 u64 ath5k_hw_get_tsf64(struct ath5k_hw *ah)
596 u64 tsf = ath5k_hw_reg_read(ah, AR5K_TSF_U32);
597 ATH5K_TRACE(ah->ah_sc);
599 return ath5k_hw_reg_read(ah, AR5K_TSF_L32) | (tsf << 32);
603 * ath5k_hw_set_tsf64 - Set a new 64bit TSF
605 * @ah: The &struct ath5k_hw
606 * @tsf64: The new 64bit TSF
610 void ath5k_hw_set_tsf64(struct ath5k_hw *ah, u64 tsf64)
612 ATH5K_TRACE(ah->ah_sc);
614 ath5k_hw_reg_write(ah, tsf64 & 0xffffffff, AR5K_TSF_L32);
615 ath5k_hw_reg_write(ah, (tsf64 >> 32) & 0xffffffff, AR5K_TSF_U32);
619 * ath5k_hw_reset_tsf - Force a TSF reset
621 * @ah: The &struct ath5k_hw
623 * Forces a TSF reset on PCU
625 void ath5k_hw_reset_tsf(struct ath5k_hw *ah)
629 ATH5K_TRACE(ah->ah_sc);
631 val = ath5k_hw_reg_read(ah, AR5K_BEACON) | AR5K_BEACON_RESET_TSF;
634 * Each write to the RESET_TSF bit toggles a hardware internal
635 * signal to reset TSF, but if left high it will cause a TSF reset
636 * on the next chip reset as well. Thus we always write the value
637 * twice to clear the signal.
639 ath5k_hw_reg_write(ah, val, AR5K_BEACON);
640 ath5k_hw_reg_write(ah, val, AR5K_BEACON);
644 * Initialize beacon timers
646 void ath5k_hw_init_beacon(struct ath5k_hw *ah, u32 next_beacon, u32 interval)
648 u32 timer1, timer2, timer3;
650 ATH5K_TRACE(ah->ah_sc);
652 * Set the additional timers by mode
654 switch (ah->ah_op_mode) {
655 case NL80211_IFTYPE_MONITOR:
656 case NL80211_IFTYPE_STATION:
657 /* In STA mode timer1 is used as next wakeup
658 * timer and timer2 as next CFP duration start
659 * timer. Both in 1/8TUs. */
660 /* TODO: PCF handling */
661 if (ah->ah_version == AR5K_AR5210) {
668 /* Mark associated AP as PCF incapable for now */
669 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_PCF);
671 case NL80211_IFTYPE_ADHOC:
672 AR5K_REG_ENABLE_BITS(ah, AR5K_TXCFG, AR5K_TXCFG_ADHOC_BCN_ATIM);
674 /* On non-STA modes timer1 is used as next DMA
675 * beacon alert (DBA) timer and timer2 as next
676 * software beacon alert. Both in 1/8TUs. */
677 timer1 = (next_beacon - AR5K_TUNE_DMA_BEACON_RESP) << 3;
678 timer2 = (next_beacon - AR5K_TUNE_SW_BEACON_RESP) << 3;
682 /* Timer3 marks the end of our ATIM window
683 * a zero length window is not allowed because
684 * we 'll get no beacons */
685 timer3 = next_beacon + (ah->ah_atim_window ? ah->ah_atim_window : 1);
688 * Set the beacon register and enable all timers.
690 /* When in AP or Mesh Point mode zero timer0 to start TSF */
691 if (ah->ah_op_mode == NL80211_IFTYPE_AP ||
692 ah->ah_op_mode == NL80211_IFTYPE_MESH_POINT)
693 ath5k_hw_reg_write(ah, 0, AR5K_TIMER0);
695 ath5k_hw_reg_write(ah, next_beacon, AR5K_TIMER0);
696 ath5k_hw_reg_write(ah, timer1, AR5K_TIMER1);
697 ath5k_hw_reg_write(ah, timer2, AR5K_TIMER2);
698 ath5k_hw_reg_write(ah, timer3, AR5K_TIMER3);
700 /* Force a TSF reset if requested and enable beacons */
701 if (interval & AR5K_BEACON_RESET_TSF)
702 ath5k_hw_reset_tsf(ah);
704 ath5k_hw_reg_write(ah, interval & (AR5K_BEACON_PERIOD |
708 /* Flush any pending BMISS interrupts on ISR by
709 * performing a clear-on-write operation on PISR
710 * register for the BMISS bit (writing a bit on
711 * ISR togles a reset for that bit and leaves
712 * the rest bits intact) */
713 if (ah->ah_version == AR5K_AR5210)
714 ath5k_hw_reg_write(ah, AR5K_ISR_BMISS, AR5K_ISR);
716 ath5k_hw_reg_write(ah, AR5K_ISR_BMISS, AR5K_PISR);
718 /* TODO: Set enchanced sleep registers on AR5212
719 * based on vif->bss_conf params, until then
720 * disable power save reporting.*/
721 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_PWR_SV);
729 int ath5k_hw_set_beacon_timers(struct ath5k_hw *ah,
730 const struct ath5k_beacon_state *state)
732 u32 cfp_period, next_cfp, dtim, interval, next_beacon;
735 * TODO: should be changed through *state
736 * review struct ath5k_beacon_state struct
738 * XXX: These are used for cfp period bellow, are they
739 * ok ? Is it O.K. for tsf here to be 0 or should we use
742 u32 dtim_count = 0; /* XXX */
743 u32 cfp_count = 0; /* XXX */
744 u32 tsf = 0; /* XXX */
746 ATH5K_TRACE(ah->ah_sc);
747 /* Return on an invalid beacon state */
748 if (state->bs_interval < 1)
751 interval = state->bs_interval;
752 dtim = state->bs_dtim_period;
757 if (state->bs_cfp_period > 0) {
759 * Enable PCF mode and set the CFP
760 * (Contention Free Period) and timer registers
762 cfp_period = state->bs_cfp_period * state->bs_dtim_period *
764 next_cfp = (cfp_count * state->bs_dtim_period + dtim_count) *
767 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1,
768 AR5K_STA_ID1_DEFAULT_ANTENNA |
770 ath5k_hw_reg_write(ah, cfp_period, AR5K_CFP_PERIOD);
771 ath5k_hw_reg_write(ah, state->bs_cfp_max_duration,
773 ath5k_hw_reg_write(ah, (tsf + (next_cfp == 0 ? cfp_period :
774 next_cfp)) << 3, AR5K_TIMER2);
776 /* Disable PCF mode */
777 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
778 AR5K_STA_ID1_DEFAULT_ANTENNA |
783 * Enable the beacon timer register
785 ath5k_hw_reg_write(ah, state->bs_next_beacon, AR5K_TIMER0);
788 * Start the beacon timers
790 ath5k_hw_reg_write(ah, (ath5k_hw_reg_read(ah, AR5K_BEACON) &
791 ~(AR5K_BEACON_PERIOD | AR5K_BEACON_TIM)) |
792 AR5K_REG_SM(state->bs_tim_offset ? state->bs_tim_offset + 4 : 0,
793 AR5K_BEACON_TIM) | AR5K_REG_SM(state->bs_interval,
794 AR5K_BEACON_PERIOD), AR5K_BEACON);
797 * Write new beacon miss threshold, if it appears to be valid
798 * XXX: Figure out right values for min <= bs_bmiss_threshold <= max
799 * and return if its not in range. We can test this by reading value and
800 * setting value to a largest value and seeing which values register.
803 AR5K_REG_WRITE_BITS(ah, AR5K_RSSI_THR, AR5K_RSSI_THR_BMISS,
804 state->bs_bmiss_threshold);
807 * Set sleep control register
808 * XXX: Didn't find this in 5210 code but since this register
809 * exists also in ar5k's 5210 headers i leave it as common code.
811 AR5K_REG_WRITE_BITS(ah, AR5K_SLEEP_CTL, AR5K_SLEEP_CTL_SLDUR,
812 (state->bs_sleep_duration - 3) << 3);
815 * Set enhanced sleep registers on 5212
817 if (ah->ah_version == AR5K_AR5212) {
818 if (state->bs_sleep_duration > state->bs_interval &&
819 roundup(state->bs_sleep_duration, interval) ==
820 state->bs_sleep_duration)
821 interval = state->bs_sleep_duration;
823 if (state->bs_sleep_duration > dtim && (dtim == 0 ||
824 roundup(state->bs_sleep_duration, dtim) ==
825 state->bs_sleep_duration))
826 dtim = state->bs_sleep_duration;
831 next_beacon = interval == dtim ? state->bs_next_dtim :
832 state->bs_next_beacon;
834 ath5k_hw_reg_write(ah,
835 AR5K_REG_SM((state->bs_next_dtim - 3) << 3,
836 AR5K_SLEEP0_NEXT_DTIM) |
837 AR5K_REG_SM(10, AR5K_SLEEP0_CABTO) |
838 AR5K_SLEEP0_ENH_SLEEP_EN |
839 AR5K_SLEEP0_ASSUME_DTIM, AR5K_SLEEP0);
841 ath5k_hw_reg_write(ah, AR5K_REG_SM((next_beacon - 3) << 3,
842 AR5K_SLEEP1_NEXT_TIM) |
843 AR5K_REG_SM(10, AR5K_SLEEP1_BEACON_TO), AR5K_SLEEP1);
845 ath5k_hw_reg_write(ah,
846 AR5K_REG_SM(interval, AR5K_SLEEP2_TIM_PER) |
847 AR5K_REG_SM(dtim, AR5K_SLEEP2_DTIM_PER), AR5K_SLEEP2);
854 * Reset beacon timers
856 void ath5k_hw_reset_beacon(struct ath5k_hw *ah)
858 ATH5K_TRACE(ah->ah_sc);
860 * Disable beacon timer
862 ath5k_hw_reg_write(ah, 0, AR5K_TIMER0);
865 * Disable some beacon register values
867 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
868 AR5K_STA_ID1_DEFAULT_ANTENNA | AR5K_STA_ID1_PCF);
869 ath5k_hw_reg_write(ah, AR5K_BEACON_PERIOD, AR5K_BEACON);
873 * Wait for beacon queue to finish
875 int ath5k_hw_beaconq_finish(struct ath5k_hw *ah, unsigned long phys_addr)
880 ATH5K_TRACE(ah->ah_sc);
882 /* 5210 doesn't have QCU*/
883 if (ah->ah_version == AR5K_AR5210) {
885 * Wait for beaconn queue to finish by checking
886 * Control Register and Beacon Status Register.
888 for (i = AR5K_TUNE_BEACON_INTERVAL / 2; i > 0; i--) {
889 if (!(ath5k_hw_reg_read(ah, AR5K_BSR) & AR5K_BSR_TXQ1F)
891 !(ath5k_hw_reg_read(ah, AR5K_CR) & AR5K_BSR_TXQ1F))
899 * Re-schedule the beacon queue
901 ath5k_hw_reg_write(ah, phys_addr, AR5K_NOQCU_TXDP1);
902 ath5k_hw_reg_write(ah, AR5K_BCR_TQ1V | AR5K_BCR_BDMAE,
910 ret = ath5k_hw_register_timeout(ah,
911 AR5K_QUEUE_STATUS(AR5K_TX_QUEUE_ID_BEACON),
912 AR5K_QCU_STS_FRMPENDCNT, 0, false);
914 if (AR5K_REG_READ_Q(ah, AR5K_QCU_TXE, AR5K_TX_QUEUE_ID_BEACON))
923 /*********************\
924 * Key table functions *
925 \*********************/
928 * Reset a key entry on the table
930 int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry)
932 unsigned int i, type;
933 u16 micentry = entry + AR5K_KEYTABLE_MIC_OFFSET;
935 ATH5K_TRACE(ah->ah_sc);
936 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
938 type = ath5k_hw_reg_read(ah, AR5K_KEYTABLE_TYPE(entry));
940 for (i = 0; i < AR5K_KEYCACHE_SIZE; i++)
941 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_OFF(entry, i));
943 /* Reset associated MIC entry if TKIP
944 * is enabled located at offset (entry + 64) */
945 if (type == AR5K_KEYTABLE_TYPE_TKIP) {
946 AR5K_ASSERT_ENTRY(micentry, AR5K_KEYTABLE_SIZE);
947 for (i = 0; i < AR5K_KEYCACHE_SIZE / 2 ; i++)
948 ath5k_hw_reg_write(ah, 0,
949 AR5K_KEYTABLE_OFF(micentry, i));
953 * Set NULL encryption on AR5212+
955 * Note: AR5K_KEYTABLE_TYPE -> AR5K_KEYTABLE_OFF(entry, 5)
956 * AR5K_KEYTABLE_TYPE_NULL -> 0x00000007
958 * Note2: Windows driver (ndiswrapper) sets this to
959 * 0x00000714 instead of 0x00000007
961 if (ah->ah_version >= AR5K_AR5211) {
962 ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
963 AR5K_KEYTABLE_TYPE(entry));
965 if (type == AR5K_KEYTABLE_TYPE_TKIP) {
966 ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
967 AR5K_KEYTABLE_TYPE(micentry));
975 * Check if a table entry is valid
977 int ath5k_hw_is_key_valid(struct ath5k_hw *ah, u16 entry)
979 ATH5K_TRACE(ah->ah_sc);
980 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
982 /* Check the validation flag at the end of the entry */
983 return ath5k_hw_reg_read(ah, AR5K_KEYTABLE_MAC1(entry)) &
988 int ath5k_keycache_type(const struct ieee80211_key_conf *key)
992 return AR5K_KEYTABLE_TYPE_TKIP;
994 return AR5K_KEYTABLE_TYPE_CCM;
996 if (key->keylen == WLAN_KEY_LEN_WEP40)
997 return AR5K_KEYTABLE_TYPE_40;
998 else if (key->keylen == WLAN_KEY_LEN_WEP104)
999 return AR5K_KEYTABLE_TYPE_104;
1008 * Set a key entry on the table
1010 int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry,
1011 const struct ieee80211_key_conf *key, const u8 *mac)
1015 __le32 key_v[5] = {};
1016 __le32 key0 = 0, key1 = 0;
1017 __le32 *rxmic, *txmic;
1019 u16 micentry = entry + AR5K_KEYTABLE_MIC_OFFSET;
1023 ATH5K_TRACE(ah->ah_sc);
1025 is_tkip = (key->alg == ALG_TKIP);
1028 * key->keylen comes in from mac80211 in bytes.
1029 * TKIP is 128 bit + 128 bit mic
1031 keylen = (is_tkip) ? (128 / 8) : key->keylen;
1033 if (entry > AR5K_KEYTABLE_SIZE ||
1034 (is_tkip && micentry > AR5K_KEYTABLE_SIZE))
1037 if (unlikely(keylen > 16))
1040 keytype = ath5k_keycache_type(key);
1045 * each key block is 6 bytes wide, written as pairs of
1046 * alternating 32 and 16 bit le values.
1049 for (i = 0; keylen >= 6; keylen -= 6) {
1050 memcpy(&key_v[i], key_ptr, 6);
1055 memcpy(&key_v[i], key_ptr, keylen);
1057 /* intentionally corrupt key until mic is installed */
1059 key0 = key_v[0] = ~key_v[0];
1060 key1 = key_v[1] = ~key_v[1];
1063 for (i = 0; i < ARRAY_SIZE(key_v); i++)
1064 ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
1065 AR5K_KEYTABLE_OFF(entry, i));
1067 ath5k_hw_reg_write(ah, keytype, AR5K_KEYTABLE_TYPE(entry));
1070 /* Install rx/tx MIC */
1071 rxmic = (__le32 *) &key->key[16];
1072 txmic = (__le32 *) &key->key[24];
1074 if (ah->ah_combined_mic) {
1075 key_v[0] = rxmic[0];
1076 key_v[1] = cpu_to_le32(le32_to_cpu(txmic[0]) >> 16);
1077 key_v[2] = rxmic[1];
1078 key_v[3] = cpu_to_le32(le32_to_cpu(txmic[0]) & 0xffff);
1079 key_v[4] = txmic[1];
1081 key_v[0] = rxmic[0];
1083 key_v[2] = rxmic[1];
1087 for (i = 0; i < ARRAY_SIZE(key_v); i++)
1088 ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
1089 AR5K_KEYTABLE_OFF(micentry, i));
1091 ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
1092 AR5K_KEYTABLE_TYPE(micentry));
1093 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_MAC0(micentry));
1094 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_MAC1(micentry));
1096 /* restore first 2 words of key */
1097 ath5k_hw_reg_write(ah, le32_to_cpu(~key0),
1098 AR5K_KEYTABLE_OFF(entry, 0));
1099 ath5k_hw_reg_write(ah, le32_to_cpu(~key1),
1100 AR5K_KEYTABLE_OFF(entry, 1));
1103 return ath5k_hw_set_key_lladdr(ah, entry, mac);
1106 int ath5k_hw_set_key_lladdr(struct ath5k_hw *ah, u16 entry, const u8 *mac)
1108 u32 low_id, high_id;
1110 ATH5K_TRACE(ah->ah_sc);
1111 /* Invalid entry (key table overflow) */
1112 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
1115 * MAC may be NULL if it's a broadcast key. In this case no need to
1116 * to compute get_unaligned_le32 and get_unaligned_le16 as we
1120 low_id = 0xffffffff;
1121 high_id = 0xffff | AR5K_KEYTABLE_VALID;
1123 low_id = get_unaligned_le32(mac);
1124 high_id = get_unaligned_le16(mac + 4) | AR5K_KEYTABLE_VALID;
1127 ath5k_hw_reg_write(ah, low_id, AR5K_KEYTABLE_MAC0(entry));
1128 ath5k_hw_reg_write(ah, high_id, AR5K_KEYTABLE_MAC1(entry));
1134 * ath5k_hw_set_coverage_class - Set IEEE 802.11 coverage class
1136 * @ah: The &struct ath5k_hw
1137 * @coverage_class: IEEE 802.11 coverage class number
1139 * Sets slot time, ACK timeout and CTS timeout for given coverage class.
1141 void ath5k_hw_set_coverage_class(struct ath5k_hw *ah, u8 coverage_class)
1143 /* As defined by IEEE 802.11-2007 17.3.8.6 */
1144 int slot_time = ath5k_hw_get_default_slottime(ah) + 3 * coverage_class;
1145 int ack_timeout = ath5k_hw_get_default_sifs(ah) + slot_time;
1146 int cts_timeout = ack_timeout;
1148 ath5k_hw_set_slot_time(ah, slot_time);
1149 ath5k_hw_set_ack_timeout(ah, ack_timeout);
1150 ath5k_hw_set_cts_timeout(ah, cts_timeout);
1152 ah->ah_coverage_class = coverage_class;