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 \*********************************/
37 * ath5k_hw_set_opmode - Set PCU operating mode
39 * @ah: The &struct ath5k_hw
41 * Initialize PCU for the various operating modes (AP/STA etc)
43 * NOTE: ah->ah_op_mode must be set before calling this.
45 int ath5k_hw_set_opmode(struct ath5k_hw *ah)
47 u32 pcu_reg, beacon_reg, low_id, high_id;
50 /* Preserve rest settings */
51 pcu_reg = ath5k_hw_reg_read(ah, AR5K_STA_ID1) & 0xffff0000;
52 pcu_reg &= ~(AR5K_STA_ID1_ADHOC | AR5K_STA_ID1_AP
53 | AR5K_STA_ID1_KEYSRCH_MODE
54 | (ah->ah_version == AR5K_AR5210 ?
55 (AR5K_STA_ID1_PWR_SV | AR5K_STA_ID1_NO_PSPOLL) : 0));
59 ATH5K_TRACE(ah->ah_sc);
61 switch (ah->ah_op_mode) {
62 case NL80211_IFTYPE_ADHOC:
63 pcu_reg |= AR5K_STA_ID1_ADHOC | AR5K_STA_ID1_KEYSRCH_MODE;
64 beacon_reg |= AR5K_BCR_ADHOC;
65 if (ah->ah_version == AR5K_AR5210)
66 pcu_reg |= AR5K_STA_ID1_NO_PSPOLL;
68 AR5K_REG_DISABLE_BITS(ah, AR5K_CFG, AR5K_CFG_ADHOC);
71 case NL80211_IFTYPE_AP:
72 case NL80211_IFTYPE_MESH_POINT:
73 pcu_reg |= AR5K_STA_ID1_AP | AR5K_STA_ID1_KEYSRCH_MODE;
74 beacon_reg |= AR5K_BCR_AP;
75 if (ah->ah_version == AR5K_AR5210)
76 pcu_reg |= AR5K_STA_ID1_NO_PSPOLL;
78 AR5K_REG_ENABLE_BITS(ah, AR5K_CFG, AR5K_CFG_ADHOC);
81 case NL80211_IFTYPE_STATION:
82 pcu_reg |= AR5K_STA_ID1_KEYSRCH_MODE
83 | (ah->ah_version == AR5K_AR5210 ?
84 AR5K_STA_ID1_PWR_SV : 0);
85 case NL80211_IFTYPE_MONITOR:
86 pcu_reg |= AR5K_STA_ID1_KEYSRCH_MODE
87 | (ah->ah_version == AR5K_AR5210 ?
88 AR5K_STA_ID1_NO_PSPOLL : 0);
98 low_id = AR5K_LOW_ID(ah->ah_sta_id);
99 high_id = AR5K_HIGH_ID(ah->ah_sta_id);
100 ath5k_hw_reg_write(ah, low_id, AR5K_STA_ID0);
101 ath5k_hw_reg_write(ah, pcu_reg | high_id, AR5K_STA_ID1);
104 * Set Beacon Control Register on 5210
106 if (ah->ah_version == AR5K_AR5210)
107 ath5k_hw_reg_write(ah, beacon_reg, AR5K_BCR);
113 * ath5k_hw_update - Update mib counters (mac layer statistics)
115 * @ah: The &struct ath5k_hw
116 * @stats: The &struct ieee80211_low_level_stats we use to track
117 * statistics on the driver
119 * Reads MIB counters from PCU and updates sw statistics. Must be
120 * called after a MIB interrupt.
122 void ath5k_hw_update_mib_counters(struct ath5k_hw *ah,
123 struct ieee80211_low_level_stats *stats)
125 ATH5K_TRACE(ah->ah_sc);
128 stats->dot11ACKFailureCount += ath5k_hw_reg_read(ah, AR5K_ACK_FAIL);
129 stats->dot11RTSFailureCount += ath5k_hw_reg_read(ah, AR5K_RTS_FAIL);
130 stats->dot11RTSSuccessCount += ath5k_hw_reg_read(ah, AR5K_RTS_OK);
131 stats->dot11FCSErrorCount += ath5k_hw_reg_read(ah, AR5K_FCS_FAIL);
133 /* XXX: Should we use this to track beacon count ?
134 * -we read it anyway to clear the register */
135 ath5k_hw_reg_read(ah, AR5K_BEACON_CNT);
137 /* Reset profile count registers on 5212*/
138 if (ah->ah_version == AR5K_AR5212) {
139 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_TX);
140 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_RX);
141 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_RXCLR);
142 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_CYCLE);
145 /* TODO: Handle ANI stats */
149 * ath5k_hw_set_ack_bitrate - set bitrate for ACKs
151 * @ah: The &struct ath5k_hw
152 * @high: Flag to determine if we want to use high transmition rate
155 * If high flag is set, we tell hw to use a set of control rates based on
156 * the current transmition rate (check out control_rates array inside reset.c).
157 * If not hw just uses the lowest rate available for the current modulation
158 * scheme being used (1Mbit for CCK and 6Mbits for OFDM).
160 void ath5k_hw_set_ack_bitrate_high(struct ath5k_hw *ah, bool high)
162 if (ah->ah_version != AR5K_AR5212)
165 u32 val = AR5K_STA_ID1_BASE_RATE_11B | AR5K_STA_ID1_ACKCTS_6MB;
167 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1, val);
169 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, val);
179 * ath5k_hw_het_ack_timeout - Get ACK timeout from PCU in usec
181 * @ah: The &struct ath5k_hw
183 unsigned int ath5k_hw_get_ack_timeout(struct ath5k_hw *ah)
185 ATH5K_TRACE(ah->ah_sc);
187 return ath5k_hw_clocktoh(AR5K_REG_MS(ath5k_hw_reg_read(ah,
188 AR5K_TIME_OUT), AR5K_TIME_OUT_ACK), ah->ah_turbo);
192 * ath5k_hw_set_ack_timeout - Set ACK timeout on PCU
194 * @ah: The &struct ath5k_hw
195 * @timeout: Timeout in usec
197 int ath5k_hw_set_ack_timeout(struct ath5k_hw *ah, unsigned int timeout)
199 ATH5K_TRACE(ah->ah_sc);
200 if (ath5k_hw_clocktoh(AR5K_REG_MS(0xffffffff, AR5K_TIME_OUT_ACK),
201 ah->ah_turbo) <= timeout)
204 AR5K_REG_WRITE_BITS(ah, AR5K_TIME_OUT, AR5K_TIME_OUT_ACK,
205 ath5k_hw_htoclock(timeout, ah->ah_turbo));
211 * ath5k_hw_get_cts_timeout - Get CTS timeout from PCU in usec
213 * @ah: The &struct ath5k_hw
215 unsigned int ath5k_hw_get_cts_timeout(struct ath5k_hw *ah)
217 ATH5K_TRACE(ah->ah_sc);
218 return ath5k_hw_clocktoh(AR5K_REG_MS(ath5k_hw_reg_read(ah,
219 AR5K_TIME_OUT), AR5K_TIME_OUT_CTS), ah->ah_turbo);
223 * ath5k_hw_set_cts_timeout - Set CTS timeout on PCU
225 * @ah: The &struct ath5k_hw
226 * @timeout: Timeout in usec
228 int ath5k_hw_set_cts_timeout(struct ath5k_hw *ah, unsigned int timeout)
230 ATH5K_TRACE(ah->ah_sc);
231 if (ath5k_hw_clocktoh(AR5K_REG_MS(0xffffffff, AR5K_TIME_OUT_CTS),
232 ah->ah_turbo) <= timeout)
235 AR5K_REG_WRITE_BITS(ah, AR5K_TIME_OUT, AR5K_TIME_OUT_CTS,
236 ath5k_hw_htoclock(timeout, ah->ah_turbo));
247 * ath5k_hw_get_lladdr - Get station id
249 * @ah: The &struct ath5k_hw
250 * @mac: The card's mac address
252 * Initialize ah->ah_sta_id using the mac address provided
255 * TODO: Remove it once we merge ath5k_softc and ath5k_hw
257 void ath5k_hw_get_lladdr(struct ath5k_hw *ah, u8 *mac)
259 ATH5K_TRACE(ah->ah_sc);
260 memcpy(mac, ah->ah_sta_id, ETH_ALEN);
264 * ath5k_hw_set_lladdr - Set station id
266 * @ah: The &struct ath5k_hw
267 * @mac: The card's mac address
269 * Set station id on hw using the provided mac address
271 * NOTE: This is only called during attach, don't call it
272 * on reset because it overwrites all AR5K_STA_ID1 settings.
273 * We have set_opmode (above) for reset.
275 int ath5k_hw_set_lladdr(struct ath5k_hw *ah, const u8 *mac)
279 ATH5K_TRACE(ah->ah_sc);
280 /* Set new station ID */
281 memcpy(ah->ah_sta_id, mac, ETH_ALEN);
283 low_id = AR5K_LOW_ID(mac);
284 high_id = AR5K_HIGH_ID(mac);
286 ath5k_hw_reg_write(ah, low_id, AR5K_STA_ID0);
287 ath5k_hw_reg_write(ah, high_id, AR5K_STA_ID1);
293 * ath5k_hw_set_associd - Set BSSID for association
295 * @ah: The &struct ath5k_hw
297 * @assoc_id: Assoc id
299 * Sets the BSSID which trigers the "SME Join" operation
301 void ath5k_hw_set_associd(struct ath5k_hw *ah, const u8 *bssid, u16 assoc_id)
307 * Set simple BSSID mask on 5212
309 if (ah->ah_version == AR5K_AR5212) {
310 ath5k_hw_reg_write(ah, AR5K_LOW_ID(ah->ah_bssid_mask),
312 ath5k_hw_reg_write(ah, AR5K_HIGH_ID(ah->ah_bssid_mask),
317 * Set BSSID which triggers the "SME Join" operation
319 low_id = AR5K_LOW_ID(bssid);
320 high_id = AR5K_HIGH_ID(bssid);
321 ath5k_hw_reg_write(ah, low_id, AR5K_BSS_ID0);
322 ath5k_hw_reg_write(ah, high_id | ((assoc_id & 0x3fff) <<
323 AR5K_BSS_ID1_AID_S), AR5K_BSS_ID1);
326 ath5k_hw_disable_pspoll(ah);
330 AR5K_REG_WRITE_BITS(ah, AR5K_BEACON, AR5K_BEACON_TIM,
331 tim_offset ? tim_offset + 4 : 0);
333 ath5k_hw_enable_pspoll(ah, NULL, 0);
337 * ath5k_hw_set_bssid_mask - filter out bssids we listen
339 * @ah: the &struct ath5k_hw
340 * @mask: the bssid_mask, a u8 array of size ETH_ALEN
342 * BSSID masking is a method used by AR5212 and newer hardware to inform PCU
343 * which bits of the interface's MAC address should be looked at when trying
344 * to decide which packets to ACK. In station mode and AP mode with a single
345 * BSS every bit matters since we lock to only one BSS. In AP mode with
346 * multiple BSSes (virtual interfaces) not every bit matters because hw must
347 * accept frames for all BSSes and so we tweak some bits of our mac address
348 * in order to have multiple BSSes.
350 * NOTE: This is a simple filter and does *not* filter out all
351 * relevant frames. Some frames that are not for us might get ACKed from us
352 * by PCU because they just match the mask.
354 * When handling multiple BSSes you can get the BSSID mask by computing the
355 * set of ~ ( MAC XOR BSSID ) for all bssids we handle.
357 * When you do this you are essentially computing the common bits of all your
358 * BSSes. Later it is assumed the harware will "and" (&) the BSSID mask with
359 * the MAC address to obtain the relevant bits and compare the result with
360 * (frame's BSSID & mask) to see if they match.
363 * Simple example: on your card you have have two BSSes you have created with
364 * BSSID-01 and BSSID-02. Lets assume BSSID-01 will not use the MAC address.
365 * There is another BSSID-03 but you are not part of it. For simplicity's sake,
366 * assuming only 4 bits for a mac address and for BSSIDs you can then have:
370 * BSSID-01: 0100 | --> Belongs to us
373 * -------------------
374 * BSSID-03: 0110 | --> External
375 * -------------------
377 * Our bssid_mask would then be:
379 * On loop iteration for BSSID-01:
380 * ~(0001 ^ 0100) -> ~(0101)
384 * On loop iteration for BSSID-02:
385 * bssid_mask &= ~(0001 ^ 1001)
386 * bssid_mask = (1010) & ~(0001 ^ 1001)
387 * bssid_mask = (1010) & ~(1001)
388 * bssid_mask = (1010) & (0110)
391 * A bssid_mask of 0010 means "only pay attention to the second least
392 * significant bit". This is because its the only bit common
393 * amongst the MAC and all BSSIDs we support. To findout what the real
394 * common bit is we can simply "&" the bssid_mask now with any BSSID we have
395 * or our MAC address (we assume the hardware uses the MAC address).
397 * Now, suppose there's an incoming frame for BSSID-03:
401 * An easy eye-inspeciton of this already should tell you that this frame
402 * will not pass our check. This is beacuse the bssid_mask tells the
403 * hardware to only look at the second least significant bit and the
404 * common bit amongst the MAC and BSSIDs is 0, this frame has the 2nd LSB
405 * as 1, which does not match 0.
407 * So with IFRAME-01 we *assume* the hardware will do:
409 * allow = (IFRAME-01 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
410 * --> allow = (0110 & 0010) == (0010 & 0001) ? 1 : 0;
411 * --> allow = (0010) == 0000 ? 1 : 0;
414 * Lets now test a frame that should work:
416 * IFRAME-02: 0001 (we should allow)
418 * allow = (0001 & 1010) == 1010
420 * allow = (IFRAME-02 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
421 * --> allow = (0001 & 0010) == (0010 & 0001) ? 1 :0;
422 * --> allow = (0010) == (0010)
427 * IFRAME-03: 0100 --> allowed
428 * IFRAME-04: 1001 --> allowed
429 * IFRAME-05: 1101 --> allowed but its not for us!!!
432 int ath5k_hw_set_bssid_mask(struct ath5k_hw *ah, const u8 *mask)
435 ATH5K_TRACE(ah->ah_sc);
437 /* Cache bssid mask so that we can restore it
439 memcpy(ah->ah_bssid_mask, mask, ETH_ALEN);
440 if (ah->ah_version == AR5K_AR5212) {
441 low_id = AR5K_LOW_ID(mask);
442 high_id = AR5K_HIGH_ID(mask);
444 ath5k_hw_reg_write(ah, low_id, AR5K_BSS_IDM0);
445 ath5k_hw_reg_write(ah, high_id, AR5K_BSS_IDM1);
459 * ath5k_hw_start_rx_pcu - Start RX engine
461 * @ah: The &struct ath5k_hw
463 * Starts RX engine on PCU so that hw can process RXed frames
466 * NOTE: RX DMA should be already enabled using ath5k_hw_start_rx_dma
467 * TODO: Init ANI here
469 void ath5k_hw_start_rx_pcu(struct ath5k_hw *ah)
471 ATH5K_TRACE(ah->ah_sc);
472 AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW, AR5K_DIAG_SW_DIS_RX);
476 * at5k_hw_stop_rx_pcu - Stop RX engine
478 * @ah: The &struct ath5k_hw
480 * Stops RX engine on PCU
482 * TODO: Detach ANI here
484 void ath5k_hw_stop_rx_pcu(struct ath5k_hw *ah)
486 ATH5K_TRACE(ah->ah_sc);
487 AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW, AR5K_DIAG_SW_DIS_RX);
491 * Set multicast filter
493 void ath5k_hw_set_mcast_filter(struct ath5k_hw *ah, u32 filter0, u32 filter1)
495 ATH5K_TRACE(ah->ah_sc);
496 /* Set the multicat filter */
497 ath5k_hw_reg_write(ah, filter0, AR5K_MCAST_FILTER0);
498 ath5k_hw_reg_write(ah, filter1, AR5K_MCAST_FILTER1);
502 * Set multicast filter by index
504 int ath5k_hw_set_mcast_filter_idx(struct ath5k_hw *ah, u32 index)
507 ATH5K_TRACE(ah->ah_sc);
510 else if (index >= 32)
511 AR5K_REG_ENABLE_BITS(ah, AR5K_MCAST_FILTER1,
512 (1 << (index - 32)));
514 AR5K_REG_ENABLE_BITS(ah, AR5K_MCAST_FILTER0, (1 << index));
520 * Clear Multicast filter by index
522 int ath5k_hw_clear_mcast_filter_idx(struct ath5k_hw *ah, u32 index)
525 ATH5K_TRACE(ah->ah_sc);
528 else if (index >= 32)
529 AR5K_REG_DISABLE_BITS(ah, AR5K_MCAST_FILTER1,
530 (1 << (index - 32)));
532 AR5K_REG_DISABLE_BITS(ah, AR5K_MCAST_FILTER0, (1 << index));
538 * ath5k_hw_get_rx_filter - Get current rx filter
540 * @ah: The &struct ath5k_hw
542 * Returns the RX filter by reading rx filter and
543 * phy error filter registers. RX filter is used
544 * to set the allowed frame types that PCU will accept
545 * and pass to the driver. For a list of frame types
548 u32 ath5k_hw_get_rx_filter(struct ath5k_hw *ah)
550 u32 data, filter = 0;
552 ATH5K_TRACE(ah->ah_sc);
553 filter = ath5k_hw_reg_read(ah, AR5K_RX_FILTER);
555 /*Radar detection for 5212*/
556 if (ah->ah_version == AR5K_AR5212) {
557 data = ath5k_hw_reg_read(ah, AR5K_PHY_ERR_FIL);
559 if (data & AR5K_PHY_ERR_FIL_RADAR)
560 filter |= AR5K_RX_FILTER_RADARERR;
561 if (data & (AR5K_PHY_ERR_FIL_OFDM | AR5K_PHY_ERR_FIL_CCK))
562 filter |= AR5K_RX_FILTER_PHYERR;
569 * ath5k_hw_set_rx_filter - Set rx filter
571 * @ah: The &struct ath5k_hw
572 * @filter: RX filter mask (see reg.h)
574 * Sets RX filter register and also handles PHY error filter
575 * register on 5212 and newer chips so that we have proper PHY
578 void ath5k_hw_set_rx_filter(struct ath5k_hw *ah, u32 filter)
582 ATH5K_TRACE(ah->ah_sc);
584 /* Set PHY error filter register on 5212*/
585 if (ah->ah_version == AR5K_AR5212) {
586 if (filter & AR5K_RX_FILTER_RADARERR)
587 data |= AR5K_PHY_ERR_FIL_RADAR;
588 if (filter & AR5K_RX_FILTER_PHYERR)
589 data |= AR5K_PHY_ERR_FIL_OFDM | AR5K_PHY_ERR_FIL_CCK;
593 * The AR5210 uses promiscous mode to detect radar activity
595 if (ah->ah_version == AR5K_AR5210 &&
596 (filter & AR5K_RX_FILTER_RADARERR)) {
597 filter &= ~AR5K_RX_FILTER_RADARERR;
598 filter |= AR5K_RX_FILTER_PROM;
601 /*Zero length DMA (phy error reporting) */
603 AR5K_REG_ENABLE_BITS(ah, AR5K_RXCFG, AR5K_RXCFG_ZLFDMA);
605 AR5K_REG_DISABLE_BITS(ah, AR5K_RXCFG, AR5K_RXCFG_ZLFDMA);
607 /*Write RX Filter register*/
608 ath5k_hw_reg_write(ah, filter & 0xff, AR5K_RX_FILTER);
610 /*Write PHY error filter register on 5212*/
611 if (ah->ah_version == AR5K_AR5212)
612 ath5k_hw_reg_write(ah, data, AR5K_PHY_ERR_FIL);
622 * ath5k_hw_get_tsf32 - Get a 32bit TSF
624 * @ah: The &struct ath5k_hw
626 * Returns lower 32 bits of current TSF
628 u32 ath5k_hw_get_tsf32(struct ath5k_hw *ah)
630 ATH5K_TRACE(ah->ah_sc);
631 return ath5k_hw_reg_read(ah, AR5K_TSF_L32);
635 * ath5k_hw_get_tsf64 - Get the full 64bit TSF
637 * @ah: The &struct ath5k_hw
639 * Returns the current TSF
641 u64 ath5k_hw_get_tsf64(struct ath5k_hw *ah)
643 u64 tsf = ath5k_hw_reg_read(ah, AR5K_TSF_U32);
644 ATH5K_TRACE(ah->ah_sc);
646 return ath5k_hw_reg_read(ah, AR5K_TSF_L32) | (tsf << 32);
650 * ath5k_hw_reset_tsf - Force a TSF reset
652 * @ah: The &struct ath5k_hw
654 * Forces a TSF reset on PCU
656 void ath5k_hw_reset_tsf(struct ath5k_hw *ah)
660 ATH5K_TRACE(ah->ah_sc);
662 val = ath5k_hw_reg_read(ah, AR5K_BEACON) | AR5K_BEACON_RESET_TSF;
665 * Each write to the RESET_TSF bit toggles a hardware internal
666 * signal to reset TSF, but if left high it will cause a TSF reset
667 * on the next chip reset as well. Thus we always write the value
668 * twice to clear the signal.
670 ath5k_hw_reg_write(ah, val, AR5K_BEACON);
671 ath5k_hw_reg_write(ah, val, AR5K_BEACON);
675 * Initialize beacon timers
677 void ath5k_hw_init_beacon(struct ath5k_hw *ah, u32 next_beacon, u32 interval)
679 u32 timer1, timer2, timer3;
681 ATH5K_TRACE(ah->ah_sc);
683 * Set the additional timers by mode
685 switch (ah->ah_op_mode) {
686 case NL80211_IFTYPE_MONITOR:
687 case NL80211_IFTYPE_STATION:
688 /* In STA mode timer1 is used as next wakeup
689 * timer and timer2 as next CFP duration start
690 * timer. Both in 1/8TUs. */
691 /* TODO: PCF handling */
692 if (ah->ah_version == AR5K_AR5210) {
699 /* Mark associated AP as PCF incapable for now */
700 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_PCF);
702 case NL80211_IFTYPE_ADHOC:
703 AR5K_REG_ENABLE_BITS(ah, AR5K_TXCFG, AR5K_TXCFG_ADHOC_BCN_ATIM);
705 /* On non-STA modes timer1 is used as next DMA
706 * beacon alert (DBA) timer and timer2 as next
707 * software beacon alert. Both in 1/8TUs. */
708 timer1 = (next_beacon - AR5K_TUNE_DMA_BEACON_RESP) << 3;
709 timer2 = (next_beacon - AR5K_TUNE_SW_BEACON_RESP) << 3;
713 /* Timer3 marks the end of our ATIM window
714 * a zero length window is not allowed because
715 * we 'll get no beacons */
716 timer3 = next_beacon + (ah->ah_atim_window ? ah->ah_atim_window : 1);
719 * Set the beacon register and enable all timers.
721 /* When in AP mode zero timer0 to start TSF */
722 if (ah->ah_op_mode == NL80211_IFTYPE_AP)
723 ath5k_hw_reg_write(ah, 0, AR5K_TIMER0);
725 ath5k_hw_reg_write(ah, next_beacon, AR5K_TIMER0);
726 ath5k_hw_reg_write(ah, timer1, AR5K_TIMER1);
727 ath5k_hw_reg_write(ah, timer2, AR5K_TIMER2);
728 ath5k_hw_reg_write(ah, timer3, AR5K_TIMER3);
730 /* Force a TSF reset if requested and enable beacons */
731 if (interval & AR5K_BEACON_RESET_TSF)
732 ath5k_hw_reset_tsf(ah);
734 ath5k_hw_reg_write(ah, interval & (AR5K_BEACON_PERIOD |
738 /* Flush any pending BMISS interrupts on ISR by
739 * performing a clear-on-write operation on PISR
740 * register for the BMISS bit (writing a bit on
741 * ISR togles a reset for that bit and leaves
742 * the rest bits intact) */
743 if (ah->ah_version == AR5K_AR5210)
744 ath5k_hw_reg_write(ah, AR5K_ISR_BMISS, AR5K_ISR);
746 ath5k_hw_reg_write(ah, AR5K_ISR_BMISS, AR5K_PISR);
748 /* TODO: Set enchanced sleep registers on AR5212
749 * based on vif->bss_conf params, until then
750 * disable power save reporting.*/
751 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_PWR_SV);
759 int ath5k_hw_set_beacon_timers(struct ath5k_hw *ah,
760 const struct ath5k_beacon_state *state)
762 u32 cfp_period, next_cfp, dtim, interval, next_beacon;
765 * TODO: should be changed through *state
766 * review struct ath5k_beacon_state struct
768 * XXX: These are used for cfp period bellow, are they
769 * ok ? Is it O.K. for tsf here to be 0 or should we use
772 u32 dtim_count = 0; /* XXX */
773 u32 cfp_count = 0; /* XXX */
774 u32 tsf = 0; /* XXX */
776 ATH5K_TRACE(ah->ah_sc);
777 /* Return on an invalid beacon state */
778 if (state->bs_interval < 1)
781 interval = state->bs_interval;
782 dtim = state->bs_dtim_period;
787 if (state->bs_cfp_period > 0) {
789 * Enable PCF mode and set the CFP
790 * (Contention Free Period) and timer registers
792 cfp_period = state->bs_cfp_period * state->bs_dtim_period *
794 next_cfp = (cfp_count * state->bs_dtim_period + dtim_count) *
797 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1,
798 AR5K_STA_ID1_DEFAULT_ANTENNA |
800 ath5k_hw_reg_write(ah, cfp_period, AR5K_CFP_PERIOD);
801 ath5k_hw_reg_write(ah, state->bs_cfp_max_duration,
803 ath5k_hw_reg_write(ah, (tsf + (next_cfp == 0 ? cfp_period :
804 next_cfp)) << 3, AR5K_TIMER2);
806 /* Disable PCF mode */
807 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
808 AR5K_STA_ID1_DEFAULT_ANTENNA |
813 * Enable the beacon timer register
815 ath5k_hw_reg_write(ah, state->bs_next_beacon, AR5K_TIMER0);
818 * Start the beacon timers
820 ath5k_hw_reg_write(ah, (ath5k_hw_reg_read(ah, AR5K_BEACON) &
821 ~(AR5K_BEACON_PERIOD | AR5K_BEACON_TIM)) |
822 AR5K_REG_SM(state->bs_tim_offset ? state->bs_tim_offset + 4 : 0,
823 AR5K_BEACON_TIM) | AR5K_REG_SM(state->bs_interval,
824 AR5K_BEACON_PERIOD), AR5K_BEACON);
827 * Write new beacon miss threshold, if it appears to be valid
828 * XXX: Figure out right values for min <= bs_bmiss_threshold <= max
829 * and return if its not in range. We can test this by reading value and
830 * setting value to a largest value and seeing which values register.
833 AR5K_REG_WRITE_BITS(ah, AR5K_RSSI_THR, AR5K_RSSI_THR_BMISS,
834 state->bs_bmiss_threshold);
837 * Set sleep control register
838 * XXX: Didn't find this in 5210 code but since this register
839 * exists also in ar5k's 5210 headers i leave it as common code.
841 AR5K_REG_WRITE_BITS(ah, AR5K_SLEEP_CTL, AR5K_SLEEP_CTL_SLDUR,
842 (state->bs_sleep_duration - 3) << 3);
845 * Set enhanced sleep registers on 5212
847 if (ah->ah_version == AR5K_AR5212) {
848 if (state->bs_sleep_duration > state->bs_interval &&
849 roundup(state->bs_sleep_duration, interval) ==
850 state->bs_sleep_duration)
851 interval = state->bs_sleep_duration;
853 if (state->bs_sleep_duration > dtim && (dtim == 0 ||
854 roundup(state->bs_sleep_duration, dtim) ==
855 state->bs_sleep_duration))
856 dtim = state->bs_sleep_duration;
861 next_beacon = interval == dtim ? state->bs_next_dtim :
862 state->bs_next_beacon;
864 ath5k_hw_reg_write(ah,
865 AR5K_REG_SM((state->bs_next_dtim - 3) << 3,
866 AR5K_SLEEP0_NEXT_DTIM) |
867 AR5K_REG_SM(10, AR5K_SLEEP0_CABTO) |
868 AR5K_SLEEP0_ENH_SLEEP_EN |
869 AR5K_SLEEP0_ASSUME_DTIM, AR5K_SLEEP0);
871 ath5k_hw_reg_write(ah, AR5K_REG_SM((next_beacon - 3) << 3,
872 AR5K_SLEEP1_NEXT_TIM) |
873 AR5K_REG_SM(10, AR5K_SLEEP1_BEACON_TO), AR5K_SLEEP1);
875 ath5k_hw_reg_write(ah,
876 AR5K_REG_SM(interval, AR5K_SLEEP2_TIM_PER) |
877 AR5K_REG_SM(dtim, AR5K_SLEEP2_DTIM_PER), AR5K_SLEEP2);
884 * Reset beacon timers
886 void ath5k_hw_reset_beacon(struct ath5k_hw *ah)
888 ATH5K_TRACE(ah->ah_sc);
890 * Disable beacon timer
892 ath5k_hw_reg_write(ah, 0, AR5K_TIMER0);
895 * Disable some beacon register values
897 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
898 AR5K_STA_ID1_DEFAULT_ANTENNA | AR5K_STA_ID1_PCF);
899 ath5k_hw_reg_write(ah, AR5K_BEACON_PERIOD, AR5K_BEACON);
903 * Wait for beacon queue to finish
905 int ath5k_hw_beaconq_finish(struct ath5k_hw *ah, unsigned long phys_addr)
910 ATH5K_TRACE(ah->ah_sc);
912 /* 5210 doesn't have QCU*/
913 if (ah->ah_version == AR5K_AR5210) {
915 * Wait for beaconn queue to finish by checking
916 * Control Register and Beacon Status Register.
918 for (i = AR5K_TUNE_BEACON_INTERVAL / 2; i > 0; i--) {
919 if (!(ath5k_hw_reg_read(ah, AR5K_BSR) & AR5K_BSR_TXQ1F)
921 !(ath5k_hw_reg_read(ah, AR5K_CR) & AR5K_BSR_TXQ1F))
929 * Re-schedule the beacon queue
931 ath5k_hw_reg_write(ah, phys_addr, AR5K_NOQCU_TXDP1);
932 ath5k_hw_reg_write(ah, AR5K_BCR_TQ1V | AR5K_BCR_BDMAE,
940 ret = ath5k_hw_register_timeout(ah,
941 AR5K_QUEUE_STATUS(AR5K_TX_QUEUE_ID_BEACON),
942 AR5K_QCU_STS_FRMPENDCNT, 0, false);
944 if (AR5K_REG_READ_Q(ah, AR5K_QCU_TXE, AR5K_TX_QUEUE_ID_BEACON))
953 /*********************\
954 * Key table functions *
955 \*********************/
958 * Reset a key entry on the table
960 int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry)
962 unsigned int i, type;
964 ATH5K_TRACE(ah->ah_sc);
965 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
967 type = ath5k_hw_reg_read(ah, AR5K_KEYTABLE_TYPE(entry));
969 for (i = 0; i < AR5K_KEYCACHE_SIZE; i++)
970 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_OFF(entry, i));
972 /* Reset associated MIC entry if TKIP
973 * is enabled located at offset (entry + 64) */
974 if (type == AR5K_KEYTABLE_TYPE_TKIP) {
975 entry = entry + AR5K_KEYTABLE_MIC_OFFSET;
976 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
977 for (i = 0; i < AR5K_KEYCACHE_SIZE / 2 ; i++)
978 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_OFF(entry, i));
982 * Set NULL encryption on AR5212+
984 * Note: AR5K_KEYTABLE_TYPE -> AR5K_KEYTABLE_OFF(entry, 5)
985 * AR5K_KEYTABLE_TYPE_NULL -> 0x00000007
987 * Note2: Windows driver (ndiswrapper) sets this to
988 * 0x00000714 instead of 0x00000007
990 if (ah->ah_version > AR5K_AR5211)
991 ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
992 AR5K_KEYTABLE_TYPE(entry));
998 * Check if a table entry is valid
1000 int ath5k_hw_is_key_valid(struct ath5k_hw *ah, u16 entry)
1002 ATH5K_TRACE(ah->ah_sc);
1003 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
1005 /* Check the validation flag at the end of the entry */
1006 return ath5k_hw_reg_read(ah, AR5K_KEYTABLE_MAC1(entry)) &
1007 AR5K_KEYTABLE_VALID;
1011 * Set a key entry on the table
1013 int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry,
1014 const struct ieee80211_key_conf *key, const u8 *mac)
1017 __le32 key_v[5] = {};
1020 ATH5K_TRACE(ah->ah_sc);
1022 /* key->keylen comes in from mac80211 in bytes */
1024 if (key->keylen > AR5K_KEYTABLE_SIZE / 8)
1027 switch (key->keylen) {
1028 /* WEP 40-bit = 40-bit entered key + 24 bit IV = 64-bit */
1030 memcpy(&key_v[0], key->key, 5);
1031 keytype = AR5K_KEYTABLE_TYPE_40;
1034 /* WEP 104-bit = 104-bit entered key + 24-bit IV = 128-bit */
1036 memcpy(&key_v[0], &key->key[0], 6);
1037 memcpy(&key_v[2], &key->key[6], 6);
1038 memcpy(&key_v[4], &key->key[12], 1);
1039 keytype = AR5K_KEYTABLE_TYPE_104;
1041 /* WEP 128-bit = 128-bit entered key + 24 bit IV = 152-bit */
1043 memcpy(&key_v[0], &key->key[0], 6);
1044 memcpy(&key_v[2], &key->key[6], 6);
1045 memcpy(&key_v[4], &key->key[12], 4);
1046 keytype = AR5K_KEYTABLE_TYPE_128;
1050 return -EINVAL; /* shouldn't happen */
1053 for (i = 0; i < ARRAY_SIZE(key_v); i++)
1054 ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
1055 AR5K_KEYTABLE_OFF(entry, i));
1057 ath5k_hw_reg_write(ah, keytype, AR5K_KEYTABLE_TYPE(entry));
1059 return ath5k_hw_set_key_lladdr(ah, entry, mac);
1062 int ath5k_hw_set_key_lladdr(struct ath5k_hw *ah, u16 entry, const u8 *mac)
1064 u32 low_id, high_id;
1066 ATH5K_TRACE(ah->ah_sc);
1067 /* Invalid entry (key table overflow) */
1068 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
1070 /* MAC may be NULL if it's a broadcast key. In this case no need to
1071 * to compute AR5K_LOW_ID and AR5K_HIGH_ID as we already know it. */
1072 if (unlikely(mac == NULL)) {
1073 low_id = 0xffffffff;
1074 high_id = 0xffff | AR5K_KEYTABLE_VALID;
1076 low_id = AR5K_LOW_ID(mac);
1077 high_id = AR5K_HIGH_ID(mac) | AR5K_KEYTABLE_VALID;
1080 ath5k_hw_reg_write(ah, low_id, AR5K_KEYTABLE_MAC0(entry));
1081 ath5k_hw_reg_write(ah, high_id, AR5K_KEYTABLE_MAC1(entry));