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;
52 ATH5K_TRACE(ah->ah_sc);
54 switch (ah->ah_op_mode) {
55 case NL80211_IFTYPE_ADHOC:
56 pcu_reg |= AR5K_STA_ID1_ADHOC | AR5K_STA_ID1_DESC_ANTENNA |
57 (ah->ah_version == AR5K_AR5210 ?
58 AR5K_STA_ID1_NO_PSPOLL : 0);
59 beacon_reg |= AR5K_BCR_ADHOC;
62 case NL80211_IFTYPE_AP:
63 case NL80211_IFTYPE_MESH_POINT:
64 pcu_reg |= AR5K_STA_ID1_AP | AR5K_STA_ID1_RTS_DEF_ANTENNA |
65 (ah->ah_version == AR5K_AR5210 ?
66 AR5K_STA_ID1_NO_PSPOLL : 0);
67 beacon_reg |= AR5K_BCR_AP;
70 case NL80211_IFTYPE_STATION:
71 pcu_reg |= AR5K_STA_ID1_DEFAULT_ANTENNA |
72 (ah->ah_version == AR5K_AR5210 ?
73 AR5K_STA_ID1_PWR_SV : 0);
74 case NL80211_IFTYPE_MONITOR:
75 pcu_reg |= AR5K_STA_ID1_DEFAULT_ANTENNA |
76 (ah->ah_version == AR5K_AR5210 ?
77 AR5K_STA_ID1_NO_PSPOLL : 0);
87 low_id = AR5K_LOW_ID(ah->ah_sta_id);
88 high_id = AR5K_HIGH_ID(ah->ah_sta_id);
89 ath5k_hw_reg_write(ah, low_id, AR5K_STA_ID0);
90 ath5k_hw_reg_write(ah, pcu_reg | high_id, AR5K_STA_ID1);
93 * Set Beacon Control Register on 5210
95 if (ah->ah_version == AR5K_AR5210)
96 ath5k_hw_reg_write(ah, beacon_reg, AR5K_BCR);
102 * ath5k_hw_update - Update mib counters (mac layer statistics)
104 * @ah: The &struct ath5k_hw
105 * @stats: The &struct ieee80211_low_level_stats we use to track
106 * statistics on the driver
108 * Reads MIB counters from PCU and updates sw statistics. Must be
109 * called after a MIB interrupt.
111 void ath5k_hw_update_mib_counters(struct ath5k_hw *ah,
112 struct ieee80211_low_level_stats *stats)
114 ATH5K_TRACE(ah->ah_sc);
117 stats->dot11ACKFailureCount += ath5k_hw_reg_read(ah, AR5K_ACK_FAIL);
118 stats->dot11RTSFailureCount += ath5k_hw_reg_read(ah, AR5K_RTS_FAIL);
119 stats->dot11RTSSuccessCount += ath5k_hw_reg_read(ah, AR5K_RTS_OK);
120 stats->dot11FCSErrorCount += ath5k_hw_reg_read(ah, AR5K_FCS_FAIL);
122 /* XXX: Should we use this to track beacon count ?
123 * -we read it anyway to clear the register */
124 ath5k_hw_reg_read(ah, AR5K_BEACON_CNT);
126 /* Reset profile count registers on 5212*/
127 if (ah->ah_version == AR5K_AR5212) {
128 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_TX);
129 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_RX);
130 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_RXCLR);
131 ath5k_hw_reg_write(ah, 0, AR5K_PROFCNT_CYCLE);
136 * ath5k_hw_set_ack_bitrate - set bitrate for ACKs
138 * @ah: The &struct ath5k_hw
139 * @high: Flag to determine if we want to use high transmition rate
142 * If high flag is set, we tell hw to use a set of control rates based on
143 * the current transmition rate (check out control_rates array inside reset.c).
144 * If not hw just uses the lowest rate available for the current modulation
145 * scheme being used (1Mbit for CCK and 6Mbits for OFDM).
147 void ath5k_hw_set_ack_bitrate_high(struct ath5k_hw *ah, bool high)
149 if (ah->ah_version != AR5K_AR5212)
152 u32 val = AR5K_STA_ID1_BASE_RATE_11B | AR5K_STA_ID1_ACKCTS_6MB;
154 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1, val);
156 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, val);
166 * ath5k_hw_het_ack_timeout - Get ACK timeout from PCU in usec
168 * @ah: The &struct ath5k_hw
170 unsigned int ath5k_hw_get_ack_timeout(struct ath5k_hw *ah)
172 ATH5K_TRACE(ah->ah_sc);
174 return ath5k_hw_clocktoh(AR5K_REG_MS(ath5k_hw_reg_read(ah,
175 AR5K_TIME_OUT), AR5K_TIME_OUT_ACK), ah->ah_turbo);
179 * ath5k_hw_set_ack_timeout - Set ACK timeout on PCU
181 * @ah: The &struct ath5k_hw
182 * @timeout: Timeout in usec
184 int ath5k_hw_set_ack_timeout(struct ath5k_hw *ah, unsigned int timeout)
186 ATH5K_TRACE(ah->ah_sc);
187 if (ath5k_hw_clocktoh(AR5K_REG_MS(0xffffffff, AR5K_TIME_OUT_ACK),
188 ah->ah_turbo) <= timeout)
191 AR5K_REG_WRITE_BITS(ah, AR5K_TIME_OUT, AR5K_TIME_OUT_ACK,
192 ath5k_hw_htoclock(timeout, ah->ah_turbo));
198 * ath5k_hw_get_cts_timeout - Get CTS timeout from PCU in usec
200 * @ah: The &struct ath5k_hw
202 unsigned int ath5k_hw_get_cts_timeout(struct ath5k_hw *ah)
204 ATH5K_TRACE(ah->ah_sc);
205 return ath5k_hw_clocktoh(AR5K_REG_MS(ath5k_hw_reg_read(ah,
206 AR5K_TIME_OUT), AR5K_TIME_OUT_CTS), ah->ah_turbo);
210 * ath5k_hw_set_cts_timeout - Set CTS timeout on PCU
212 * @ah: The &struct ath5k_hw
213 * @timeout: Timeout in usec
215 int ath5k_hw_set_cts_timeout(struct ath5k_hw *ah, unsigned int timeout)
217 ATH5K_TRACE(ah->ah_sc);
218 if (ath5k_hw_clocktoh(AR5K_REG_MS(0xffffffff, AR5K_TIME_OUT_CTS),
219 ah->ah_turbo) <= timeout)
222 AR5K_REG_WRITE_BITS(ah, AR5K_TIME_OUT, AR5K_TIME_OUT_CTS,
223 ath5k_hw_htoclock(timeout, ah->ah_turbo));
234 * ath5k_hw_get_lladdr - Get station id
236 * @ah: The &struct ath5k_hw
237 * @mac: The card's mac address
239 * Initialize ah->ah_sta_id using the mac address provided
242 * TODO: Remove it once we merge ath5k_softc and ath5k_hw
244 void ath5k_hw_get_lladdr(struct ath5k_hw *ah, u8 *mac)
246 ATH5K_TRACE(ah->ah_sc);
247 memcpy(mac, ah->ah_sta_id, ETH_ALEN);
251 * ath5k_hw_set_lladdr - Set station id
253 * @ah: The &struct ath5k_hw
254 * @mac: The card's mac address
256 * Set station id on hw using the provided mac address
258 int ath5k_hw_set_lladdr(struct ath5k_hw *ah, const u8 *mac)
262 ATH5K_TRACE(ah->ah_sc);
263 /* Set new station ID */
264 memcpy(ah->ah_sta_id, mac, ETH_ALEN);
266 low_id = AR5K_LOW_ID(mac);
267 high_id = AR5K_HIGH_ID(mac);
269 ath5k_hw_reg_write(ah, low_id, AR5K_STA_ID0);
270 ath5k_hw_reg_write(ah, high_id, AR5K_STA_ID1);
276 * ath5k_hw_set_associd - Set BSSID for association
278 * @ah: The &struct ath5k_hw
280 * @assoc_id: Assoc id
282 * Sets the BSSID which trigers the "SME Join" operation
284 void ath5k_hw_set_associd(struct ath5k_hw *ah, const u8 *bssid, u16 assoc_id)
290 * Set simple BSSID mask on 5212
292 if (ah->ah_version == AR5K_AR5212) {
293 ath5k_hw_reg_write(ah, 0xffffffff, AR5K_BSS_IDM0);
294 ath5k_hw_reg_write(ah, 0xffffffff, AR5K_BSS_IDM1);
298 * Set BSSID which triggers the "SME Join" operation
300 low_id = AR5K_LOW_ID(bssid);
301 high_id = AR5K_HIGH_ID(bssid);
302 ath5k_hw_reg_write(ah, low_id, AR5K_BSS_ID0);
303 ath5k_hw_reg_write(ah, high_id | ((assoc_id & 0x3fff) <<
304 AR5K_BSS_ID1_AID_S), AR5K_BSS_ID1);
307 ath5k_hw_disable_pspoll(ah);
311 AR5K_REG_WRITE_BITS(ah, AR5K_BEACON, AR5K_BEACON_TIM,
312 tim_offset ? tim_offset + 4 : 0);
314 ath5k_hw_enable_pspoll(ah, NULL, 0);
318 * ath5k_hw_set_bssid_mask - filter out bssids we listen
320 * @ah: the &struct ath5k_hw
321 * @mask: the bssid_mask, a u8 array of size ETH_ALEN
323 * BSSID masking is a method used by AR5212 and newer hardware to inform PCU
324 * which bits of the interface's MAC address should be looked at when trying
325 * to decide which packets to ACK. In station mode and AP mode with a single
326 * BSS every bit matters since we lock to only one BSS. In AP mode with
327 * multiple BSSes (virtual interfaces) not every bit matters because hw must
328 * accept frames for all BSSes and so we tweak some bits of our mac address
329 * in order to have multiple BSSes.
331 * NOTE: This is a simple filter and does *not* filter out all
332 * relevant frames. Some frames that are not for us might get ACKed from us
333 * by PCU because they just match the mask.
335 * When handling multiple BSSes you can get the BSSID mask by computing the
336 * set of ~ ( MAC XOR BSSID ) for all bssids we handle.
338 * When you do this you are essentially computing the common bits of all your
339 * BSSes. Later it is assumed the harware will "and" (&) the BSSID mask with
340 * the MAC address to obtain the relevant bits and compare the result with
341 * (frame's BSSID & mask) to see if they match.
344 * Simple example: on your card you have have two BSSes you have created with
345 * BSSID-01 and BSSID-02. Lets assume BSSID-01 will not use the MAC address.
346 * There is another BSSID-03 but you are not part of it. For simplicity's sake,
347 * assuming only 4 bits for a mac address and for BSSIDs you can then have:
351 * BSSID-01: 0100 | --> Belongs to us
354 * -------------------
355 * BSSID-03: 0110 | --> External
356 * -------------------
358 * Our bssid_mask would then be:
360 * On loop iteration for BSSID-01:
361 * ~(0001 ^ 0100) -> ~(0101)
365 * On loop iteration for BSSID-02:
366 * bssid_mask &= ~(0001 ^ 1001)
367 * bssid_mask = (1010) & ~(0001 ^ 1001)
368 * bssid_mask = (1010) & ~(1001)
369 * bssid_mask = (1010) & (0110)
372 * A bssid_mask of 0010 means "only pay attention to the second least
373 * significant bit". This is because its the only bit common
374 * amongst the MAC and all BSSIDs we support. To findout what the real
375 * common bit is we can simply "&" the bssid_mask now with any BSSID we have
376 * or our MAC address (we assume the hardware uses the MAC address).
378 * Now, suppose there's an incoming frame for BSSID-03:
382 * An easy eye-inspeciton of this already should tell you that this frame
383 * will not pass our check. This is beacuse the bssid_mask tells the
384 * hardware to only look at the second least significant bit and the
385 * common bit amongst the MAC and BSSIDs is 0, this frame has the 2nd LSB
386 * as 1, which does not match 0.
388 * So with IFRAME-01 we *assume* the hardware will do:
390 * allow = (IFRAME-01 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
391 * --> allow = (0110 & 0010) == (0010 & 0001) ? 1 : 0;
392 * --> allow = (0010) == 0000 ? 1 : 0;
395 * Lets now test a frame that should work:
397 * IFRAME-02: 0001 (we should allow)
399 * allow = (0001 & 1010) == 1010
401 * allow = (IFRAME-02 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
402 * --> allow = (0001 & 0010) == (0010 & 0001) ? 1 :0;
403 * --> allow = (0010) == (0010)
408 * IFRAME-03: 0100 --> allowed
409 * IFRAME-04: 1001 --> allowed
410 * IFRAME-05: 1101 --> allowed but its not for us!!!
413 int ath5k_hw_set_bssid_mask(struct ath5k_hw *ah, const u8 *mask)
416 ATH5K_TRACE(ah->ah_sc);
418 if (ah->ah_version == AR5K_AR5212) {
419 low_id = AR5K_LOW_ID(mask);
420 high_id = AR5K_HIGH_ID(mask);
422 ath5k_hw_reg_write(ah, low_id, AR5K_BSS_IDM0);
423 ath5k_hw_reg_write(ah, high_id, AR5K_BSS_IDM1);
437 * ath5k_hw_start_rx_pcu - Start RX engine
439 * @ah: The &struct ath5k_hw
441 * Starts RX engine on PCU so that hw can process RXed frames
444 * NOTE: RX DMA should be already enabled using ath5k_hw_start_rx_dma
445 * TODO: Init ANI here
447 void ath5k_hw_start_rx_pcu(struct ath5k_hw *ah)
449 ATH5K_TRACE(ah->ah_sc);
450 AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW, AR5K_DIAG_SW_DIS_RX);
454 * at5k_hw_stop_rx_pcu - Stop RX engine
456 * @ah: The &struct ath5k_hw
458 * Stops RX engine on PCU
460 * TODO: Detach ANI here
462 void ath5k_hw_stop_rx_pcu(struct ath5k_hw *ah)
464 ATH5K_TRACE(ah->ah_sc);
465 AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW, AR5K_DIAG_SW_DIS_RX);
469 * Set multicast filter
471 void ath5k_hw_set_mcast_filter(struct ath5k_hw *ah, u32 filter0, u32 filter1)
473 ATH5K_TRACE(ah->ah_sc);
474 /* Set the multicat filter */
475 ath5k_hw_reg_write(ah, filter0, AR5K_MCAST_FILTER0);
476 ath5k_hw_reg_write(ah, filter1, AR5K_MCAST_FILTER1);
480 * Set multicast filter by index
482 int ath5k_hw_set_mcast_filter_idx(struct ath5k_hw *ah, u32 index)
485 ATH5K_TRACE(ah->ah_sc);
488 else if (index >= 32)
489 AR5K_REG_ENABLE_BITS(ah, AR5K_MCAST_FILTER1,
490 (1 << (index - 32)));
492 AR5K_REG_ENABLE_BITS(ah, AR5K_MCAST_FILTER0, (1 << index));
498 * Clear Multicast filter by index
500 int ath5k_hw_clear_mcast_filter_idx(struct ath5k_hw *ah, u32 index)
503 ATH5K_TRACE(ah->ah_sc);
506 else if (index >= 32)
507 AR5K_REG_DISABLE_BITS(ah, AR5K_MCAST_FILTER1,
508 (1 << (index - 32)));
510 AR5K_REG_DISABLE_BITS(ah, AR5K_MCAST_FILTER0, (1 << index));
516 * ath5k_hw_get_rx_filter - Get current rx filter
518 * @ah: The &struct ath5k_hw
520 * Returns the RX filter by reading rx filter and
521 * phy error filter registers. RX filter is used
522 * to set the allowed frame types that PCU will accept
523 * and pass to the driver. For a list of frame types
526 u32 ath5k_hw_get_rx_filter(struct ath5k_hw *ah)
528 u32 data, filter = 0;
530 ATH5K_TRACE(ah->ah_sc);
531 filter = ath5k_hw_reg_read(ah, AR5K_RX_FILTER);
533 /*Radar detection for 5212*/
534 if (ah->ah_version == AR5K_AR5212) {
535 data = ath5k_hw_reg_read(ah, AR5K_PHY_ERR_FIL);
537 if (data & AR5K_PHY_ERR_FIL_RADAR)
538 filter |= AR5K_RX_FILTER_RADARERR;
539 if (data & (AR5K_PHY_ERR_FIL_OFDM | AR5K_PHY_ERR_FIL_CCK))
540 filter |= AR5K_RX_FILTER_PHYERR;
547 * ath5k_hw_set_rx_filter - Set rx filter
549 * @ah: The &struct ath5k_hw
550 * @filter: RX filter mask (see reg.h)
552 * Sets RX filter register and also handles PHY error filter
553 * register on 5212 and newer chips so that we have proper PHY
556 void ath5k_hw_set_rx_filter(struct ath5k_hw *ah, u32 filter)
560 ATH5K_TRACE(ah->ah_sc);
562 /* Set PHY error filter register on 5212*/
563 if (ah->ah_version == AR5K_AR5212) {
564 if (filter & AR5K_RX_FILTER_RADARERR)
565 data |= AR5K_PHY_ERR_FIL_RADAR;
566 if (filter & AR5K_RX_FILTER_PHYERR)
567 data |= AR5K_PHY_ERR_FIL_OFDM | AR5K_PHY_ERR_FIL_CCK;
571 * The AR5210 uses promiscous mode to detect radar activity
573 if (ah->ah_version == AR5K_AR5210 &&
574 (filter & AR5K_RX_FILTER_RADARERR)) {
575 filter &= ~AR5K_RX_FILTER_RADARERR;
576 filter |= AR5K_RX_FILTER_PROM;
581 AR5K_REG_ENABLE_BITS(ah, AR5K_RXCFG, AR5K_RXCFG_ZLFDMA);
583 AR5K_REG_DISABLE_BITS(ah, AR5K_RXCFG, AR5K_RXCFG_ZLFDMA);
585 /*Write RX Filter register*/
586 ath5k_hw_reg_write(ah, filter & 0xff, AR5K_RX_FILTER);
588 /*Write PHY error filter register on 5212*/
589 if (ah->ah_version == AR5K_AR5212)
590 ath5k_hw_reg_write(ah, data, AR5K_PHY_ERR_FIL);
600 * ath5k_hw_get_tsf32 - Get a 32bit TSF
602 * @ah: The &struct ath5k_hw
604 * Returns lower 32 bits of current TSF
606 u32 ath5k_hw_get_tsf32(struct ath5k_hw *ah)
608 ATH5K_TRACE(ah->ah_sc);
609 return ath5k_hw_reg_read(ah, AR5K_TSF_L32);
613 * ath5k_hw_get_tsf64 - Get the full 64bit TSF
615 * @ah: The &struct ath5k_hw
617 * Returns the current TSF
619 u64 ath5k_hw_get_tsf64(struct ath5k_hw *ah)
621 u64 tsf = ath5k_hw_reg_read(ah, AR5K_TSF_U32);
622 ATH5K_TRACE(ah->ah_sc);
624 return ath5k_hw_reg_read(ah, AR5K_TSF_L32) | (tsf << 32);
628 * ath5k_hw_reset_tsf - Force a TSF reset
630 * @ah: The &struct ath5k_hw
632 * Forces a TSF reset on PCU
634 void ath5k_hw_reset_tsf(struct ath5k_hw *ah)
638 ATH5K_TRACE(ah->ah_sc);
640 val = ath5k_hw_reg_read(ah, AR5K_BEACON) | AR5K_BEACON_RESET_TSF;
643 * Each write to the RESET_TSF bit toggles a hardware internal
644 * signal to reset TSF, but if left high it will cause a TSF reset
645 * on the next chip reset as well. Thus we always write the value
646 * twice to clear the signal.
648 ath5k_hw_reg_write(ah, val, AR5K_BEACON);
649 ath5k_hw_reg_write(ah, val, AR5K_BEACON);
653 * Initialize beacon timers
655 void ath5k_hw_init_beacon(struct ath5k_hw *ah, u32 next_beacon, u32 interval)
657 u32 timer1, timer2, timer3;
659 ATH5K_TRACE(ah->ah_sc);
661 * Set the additional timers by mode
663 switch (ah->ah_op_mode) {
664 case NL80211_IFTYPE_STATION:
665 if (ah->ah_version == AR5K_AR5210) {
675 timer1 = (next_beacon - AR5K_TUNE_DMA_BEACON_RESP) << 3;
676 timer2 = (next_beacon - AR5K_TUNE_SW_BEACON_RESP) << 3;
679 timer3 = next_beacon + (ah->ah_atim_window ? ah->ah_atim_window : 1);
682 * Set the beacon register and enable all timers.
683 * (next beacon, DMA beacon, software beacon, ATIM window time)
685 ath5k_hw_reg_write(ah, next_beacon, AR5K_TIMER0);
686 ath5k_hw_reg_write(ah, timer1, AR5K_TIMER1);
687 ath5k_hw_reg_write(ah, timer2, AR5K_TIMER2);
688 ath5k_hw_reg_write(ah, timer3, AR5K_TIMER3);
690 ath5k_hw_reg_write(ah, interval & (AR5K_BEACON_PERIOD |
691 AR5K_BEACON_RESET_TSF | AR5K_BEACON_ENABLE),
699 int ath5k_hw_set_beacon_timers(struct ath5k_hw *ah,
700 const struct ath5k_beacon_state *state)
702 u32 cfp_period, next_cfp, dtim, interval, next_beacon;
705 * TODO: should be changed through *state
706 * review struct ath5k_beacon_state struct
708 * XXX: These are used for cfp period bellow, are they
709 * ok ? Is it O.K. for tsf here to be 0 or should we use
712 u32 dtim_count = 0; /* XXX */
713 u32 cfp_count = 0; /* XXX */
714 u32 tsf = 0; /* XXX */
716 ATH5K_TRACE(ah->ah_sc);
717 /* Return on an invalid beacon state */
718 if (state->bs_interval < 1)
721 interval = state->bs_interval;
722 dtim = state->bs_dtim_period;
727 if (state->bs_cfp_period > 0) {
729 * Enable PCF mode and set the CFP
730 * (Contention Free Period) and timer registers
732 cfp_period = state->bs_cfp_period * state->bs_dtim_period *
734 next_cfp = (cfp_count * state->bs_dtim_period + dtim_count) *
737 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1,
738 AR5K_STA_ID1_DEFAULT_ANTENNA |
740 ath5k_hw_reg_write(ah, cfp_period, AR5K_CFP_PERIOD);
741 ath5k_hw_reg_write(ah, state->bs_cfp_max_duration,
743 ath5k_hw_reg_write(ah, (tsf + (next_cfp == 0 ? cfp_period :
744 next_cfp)) << 3, AR5K_TIMER2);
746 /* Disable PCF mode */
747 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
748 AR5K_STA_ID1_DEFAULT_ANTENNA |
753 * Enable the beacon timer register
755 ath5k_hw_reg_write(ah, state->bs_next_beacon, AR5K_TIMER0);
758 * Start the beacon timers
760 ath5k_hw_reg_write(ah, (ath5k_hw_reg_read(ah, AR5K_BEACON) &
761 ~(AR5K_BEACON_PERIOD | AR5K_BEACON_TIM)) |
762 AR5K_REG_SM(state->bs_tim_offset ? state->bs_tim_offset + 4 : 0,
763 AR5K_BEACON_TIM) | AR5K_REG_SM(state->bs_interval,
764 AR5K_BEACON_PERIOD), AR5K_BEACON);
767 * Write new beacon miss threshold, if it appears to be valid
768 * XXX: Figure out right values for min <= bs_bmiss_threshold <= max
769 * and return if its not in range. We can test this by reading value and
770 * setting value to a largest value and seeing which values register.
773 AR5K_REG_WRITE_BITS(ah, AR5K_RSSI_THR, AR5K_RSSI_THR_BMISS,
774 state->bs_bmiss_threshold);
777 * Set sleep control register
778 * XXX: Didn't find this in 5210 code but since this register
779 * exists also in ar5k's 5210 headers i leave it as common code.
781 AR5K_REG_WRITE_BITS(ah, AR5K_SLEEP_CTL, AR5K_SLEEP_CTL_SLDUR,
782 (state->bs_sleep_duration - 3) << 3);
785 * Set enhanced sleep registers on 5212
787 if (ah->ah_version == AR5K_AR5212) {
788 if (state->bs_sleep_duration > state->bs_interval &&
789 roundup(state->bs_sleep_duration, interval) ==
790 state->bs_sleep_duration)
791 interval = state->bs_sleep_duration;
793 if (state->bs_sleep_duration > dtim && (dtim == 0 ||
794 roundup(state->bs_sleep_duration, dtim) ==
795 state->bs_sleep_duration))
796 dtim = state->bs_sleep_duration;
801 next_beacon = interval == dtim ? state->bs_next_dtim :
802 state->bs_next_beacon;
804 ath5k_hw_reg_write(ah,
805 AR5K_REG_SM((state->bs_next_dtim - 3) << 3,
806 AR5K_SLEEP0_NEXT_DTIM) |
807 AR5K_REG_SM(10, AR5K_SLEEP0_CABTO) |
808 AR5K_SLEEP0_ENH_SLEEP_EN |
809 AR5K_SLEEP0_ASSUME_DTIM, AR5K_SLEEP0);
811 ath5k_hw_reg_write(ah, AR5K_REG_SM((next_beacon - 3) << 3,
812 AR5K_SLEEP1_NEXT_TIM) |
813 AR5K_REG_SM(10, AR5K_SLEEP1_BEACON_TO), AR5K_SLEEP1);
815 ath5k_hw_reg_write(ah,
816 AR5K_REG_SM(interval, AR5K_SLEEP2_TIM_PER) |
817 AR5K_REG_SM(dtim, AR5K_SLEEP2_DTIM_PER), AR5K_SLEEP2);
824 * Reset beacon timers
826 void ath5k_hw_reset_beacon(struct ath5k_hw *ah)
828 ATH5K_TRACE(ah->ah_sc);
830 * Disable beacon timer
832 ath5k_hw_reg_write(ah, 0, AR5K_TIMER0);
835 * Disable some beacon register values
837 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
838 AR5K_STA_ID1_DEFAULT_ANTENNA | AR5K_STA_ID1_PCF);
839 ath5k_hw_reg_write(ah, AR5K_BEACON_PERIOD, AR5K_BEACON);
843 * Wait for beacon queue to finish
845 int ath5k_hw_beaconq_finish(struct ath5k_hw *ah, unsigned long phys_addr)
850 ATH5K_TRACE(ah->ah_sc);
852 /* 5210 doesn't have QCU*/
853 if (ah->ah_version == AR5K_AR5210) {
855 * Wait for beaconn queue to finish by checking
856 * Control Register and Beacon Status Register.
858 for (i = AR5K_TUNE_BEACON_INTERVAL / 2; i > 0; i--) {
859 if (!(ath5k_hw_reg_read(ah, AR5K_BSR) & AR5K_BSR_TXQ1F)
861 !(ath5k_hw_reg_read(ah, AR5K_CR) & AR5K_BSR_TXQ1F))
869 * Re-schedule the beacon queue
871 ath5k_hw_reg_write(ah, phys_addr, AR5K_NOQCU_TXDP1);
872 ath5k_hw_reg_write(ah, AR5K_BCR_TQ1V | AR5K_BCR_BDMAE,
880 ret = ath5k_hw_register_timeout(ah,
881 AR5K_QUEUE_STATUS(AR5K_TX_QUEUE_ID_BEACON),
882 AR5K_QCU_STS_FRMPENDCNT, 0, false);
884 if (AR5K_REG_READ_Q(ah, AR5K_QCU_TXE, AR5K_TX_QUEUE_ID_BEACON))
893 /*********************\
894 * Key table functions *
895 \*********************/
898 * Reset a key entry on the table
900 int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry)
904 ATH5K_TRACE(ah->ah_sc);
905 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
907 for (i = 0; i < AR5K_KEYCACHE_SIZE; i++)
908 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_OFF(entry, i));
911 * Set NULL encryption on AR5212+
913 * Note: AR5K_KEYTABLE_TYPE -> AR5K_KEYTABLE_OFF(entry, 5)
914 * AR5K_KEYTABLE_TYPE_NULL -> 0x00000007
916 * Note2: Windows driver (ndiswrapper) sets this to
917 * 0x00000714 instead of 0x00000007
919 if (ah->ah_version > AR5K_AR5211)
920 ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
921 AR5K_KEYTABLE_TYPE(entry));
927 * Check if a table entry is valid
929 int ath5k_hw_is_key_valid(struct ath5k_hw *ah, u16 entry)
931 ATH5K_TRACE(ah->ah_sc);
932 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
934 /* Check the validation flag at the end of the entry */
935 return ath5k_hw_reg_read(ah, AR5K_KEYTABLE_MAC1(entry)) &
940 * Set a key entry on the table
942 int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry,
943 const struct ieee80211_key_conf *key, const u8 *mac)
946 __le32 key_v[5] = {};
949 ATH5K_TRACE(ah->ah_sc);
951 /* key->keylen comes in from mac80211 in bytes */
953 if (key->keylen > AR5K_KEYTABLE_SIZE / 8)
956 switch (key->keylen) {
957 /* WEP 40-bit = 40-bit entered key + 24 bit IV = 64-bit */
959 memcpy(&key_v[0], key->key, 5);
960 keytype = AR5K_KEYTABLE_TYPE_40;
963 /* WEP 104-bit = 104-bit entered key + 24-bit IV = 128-bit */
965 memcpy(&key_v[0], &key->key[0], 6);
966 memcpy(&key_v[2], &key->key[6], 6);
967 memcpy(&key_v[4], &key->key[12], 1);
968 keytype = AR5K_KEYTABLE_TYPE_104;
970 /* WEP 128-bit = 128-bit entered key + 24 bit IV = 152-bit */
972 memcpy(&key_v[0], &key->key[0], 6);
973 memcpy(&key_v[2], &key->key[6], 6);
974 memcpy(&key_v[4], &key->key[12], 4);
975 keytype = AR5K_KEYTABLE_TYPE_128;
979 return -EINVAL; /* shouldn't happen */
982 for (i = 0; i < ARRAY_SIZE(key_v); i++)
983 ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
984 AR5K_KEYTABLE_OFF(entry, i));
986 ath5k_hw_reg_write(ah, keytype, AR5K_KEYTABLE_TYPE(entry));
988 return ath5k_hw_set_key_lladdr(ah, entry, mac);
991 int ath5k_hw_set_key_lladdr(struct ath5k_hw *ah, u16 entry, const u8 *mac)
995 ATH5K_TRACE(ah->ah_sc);
996 /* Invalid entry (key table overflow) */
997 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
999 /* MAC may be NULL if it's a broadcast key. In this case no need to
1000 * to compute AR5K_LOW_ID and AR5K_HIGH_ID as we already know it. */
1001 if (unlikely(mac == NULL)) {
1002 low_id = 0xffffffff;
1003 high_id = 0xffff | AR5K_KEYTABLE_VALID;
1005 low_id = AR5K_LOW_ID(mac);
1006 high_id = AR5K_HIGH_ID(mac) | AR5K_KEYTABLE_VALID;
1009 ath5k_hw_reg_write(ah, low_id, AR5K_KEYTABLE_MAC0(entry));
1010 ath5k_hw_reg_write(ah, high_id, AR5K_KEYTABLE_MAC1(entry));