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(AR5K_REG_MS(ath5k_hw_reg_read(ah,
191 AR5K_TIME_OUT), AR5K_TIME_OUT_ACK), ah->ah_turbo);
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(AR5K_REG_MS(0xffffffff, AR5K_TIME_OUT_ACK),
204 ah->ah_turbo) <= timeout)
207 AR5K_REG_WRITE_BITS(ah, AR5K_TIME_OUT, AR5K_TIME_OUT_ACK,
208 ath5k_hw_htoclock(timeout, ah->ah_turbo));
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(AR5K_REG_MS(ath5k_hw_reg_read(ah,
222 AR5K_TIME_OUT), AR5K_TIME_OUT_CTS), ah->ah_turbo);
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(AR5K_REG_MS(0xffffffff, AR5K_TIME_OUT_CTS),
235 ah->ah_turbo) <= timeout)
238 AR5K_REG_WRITE_BITS(ah, AR5K_TIME_OUT, AR5K_TIME_OUT_CTS,
239 ath5k_hw_htoclock(timeout, ah->ah_turbo));
245 * ath5k_hw_set_lladdr - Set station id
247 * @ah: The &struct ath5k_hw
248 * @mac: The card's mac address
250 * Set station id on hw using the provided mac address
252 int ath5k_hw_set_lladdr(struct ath5k_hw *ah, const u8 *mac)
254 struct ath_common *common = ath5k_hw_common(ah);
258 ATH5K_TRACE(ah->ah_sc);
259 /* Set new station ID */
260 memcpy(common->macaddr, mac, ETH_ALEN);
262 pcu_reg = ath5k_hw_reg_read(ah, AR5K_STA_ID1) & 0xffff0000;
264 low_id = get_unaligned_le32(mac);
265 high_id = get_unaligned_le16(mac + 4);
267 ath5k_hw_reg_write(ah, low_id, AR5K_STA_ID0);
268 ath5k_hw_reg_write(ah, pcu_reg | high_id, AR5K_STA_ID1);
274 * ath5k_hw_set_associd - Set BSSID for association
276 * @ah: The &struct ath5k_hw
278 * @assoc_id: Assoc id
280 * Sets the BSSID which trigers the "SME Join" operation
282 void ath5k_hw_set_associd(struct ath5k_hw *ah, const u8 *bssid, u16 assoc_id)
284 struct ath_common *common = ath5k_hw_common(ah);
289 * Set simple BSSID mask on 5212
291 if (ah->ah_version == AR5K_AR5212) {
292 ath5k_hw_reg_write(ah, get_unaligned_le32(common->bssidmask),
294 ath5k_hw_reg_write(ah,
295 get_unaligned_le16(common->curbssid + 4),
300 * Set BSSID which triggers the "SME Join" operation
302 low_id = get_unaligned_le32(bssid);
303 high_id = get_unaligned_le16(bssid);
304 ath5k_hw_reg_write(ah, low_id, AR5K_BSS_ID0);
305 ath5k_hw_reg_write(ah, high_id | ((assoc_id & 0x3fff) <<
306 AR5K_BSS_ID1_AID_S), AR5K_BSS_ID1);
309 ath5k_hw_disable_pspoll(ah);
313 AR5K_REG_WRITE_BITS(ah, AR5K_BEACON, AR5K_BEACON_TIM,
314 tim_offset ? tim_offset + 4 : 0);
316 ath5k_hw_enable_pspoll(ah, NULL, 0);
320 * ath5k_hw_set_bssid_mask - filter out bssids we listen
322 * @ah: the &struct ath5k_hw
323 * @mask: the bssid_mask, a u8 array of size ETH_ALEN
325 * BSSID masking is a method used by AR5212 and newer hardware to inform PCU
326 * which bits of the interface's MAC address should be looked at when trying
327 * to decide which packets to ACK. In station mode and AP mode with a single
328 * BSS every bit matters since we lock to only one BSS. In AP mode with
329 * multiple BSSes (virtual interfaces) not every bit matters because hw must
330 * accept frames for all BSSes and so we tweak some bits of our mac address
331 * in order to have multiple BSSes.
333 * NOTE: This is a simple filter and does *not* filter out all
334 * relevant frames. Some frames that are not for us might get ACKed from us
335 * by PCU because they just match the mask.
337 * When handling multiple BSSes you can get the BSSID mask by computing the
338 * set of ~ ( MAC XOR BSSID ) for all bssids we handle.
340 * When you do this you are essentially computing the common bits of all your
341 * BSSes. Later it is assumed the harware will "and" (&) the BSSID mask with
342 * the MAC address to obtain the relevant bits and compare the result with
343 * (frame's BSSID & mask) to see if they match.
346 * Simple example: on your card you have have two BSSes you have created with
347 * BSSID-01 and BSSID-02. Lets assume BSSID-01 will not use the MAC address.
348 * There is another BSSID-03 but you are not part of it. For simplicity's sake,
349 * assuming only 4 bits for a mac address and for BSSIDs you can then have:
353 * BSSID-01: 0100 | --> Belongs to us
356 * -------------------
357 * BSSID-03: 0110 | --> External
358 * -------------------
360 * Our bssid_mask would then be:
362 * On loop iteration for BSSID-01:
363 * ~(0001 ^ 0100) -> ~(0101)
367 * On loop iteration for BSSID-02:
368 * bssid_mask &= ~(0001 ^ 1001)
369 * bssid_mask = (1010) & ~(0001 ^ 1001)
370 * bssid_mask = (1010) & ~(1001)
371 * bssid_mask = (1010) & (0110)
374 * A bssid_mask of 0010 means "only pay attention to the second least
375 * significant bit". This is because its the only bit common
376 * amongst the MAC and all BSSIDs we support. To findout what the real
377 * common bit is we can simply "&" the bssid_mask now with any BSSID we have
378 * or our MAC address (we assume the hardware uses the MAC address).
380 * Now, suppose there's an incoming frame for BSSID-03:
384 * An easy eye-inspeciton of this already should tell you that this frame
385 * will not pass our check. This is beacuse the bssid_mask tells the
386 * hardware to only look at the second least significant bit and the
387 * common bit amongst the MAC and BSSIDs is 0, this frame has the 2nd LSB
388 * as 1, which does not match 0.
390 * So with IFRAME-01 we *assume* the hardware will do:
392 * allow = (IFRAME-01 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
393 * --> allow = (0110 & 0010) == (0010 & 0001) ? 1 : 0;
394 * --> allow = (0010) == 0000 ? 1 : 0;
397 * Lets now test a frame that should work:
399 * IFRAME-02: 0001 (we should allow)
401 * allow = (0001 & 1010) == 1010
403 * allow = (IFRAME-02 & bssid_mask) == (bssid_mask & MAC) ? 1 : 0;
404 * --> allow = (0001 & 0010) == (0010 & 0001) ? 1 :0;
405 * --> allow = (0010) == (0010)
410 * IFRAME-03: 0100 --> allowed
411 * IFRAME-04: 1001 --> allowed
412 * IFRAME-05: 1101 --> allowed but its not for us!!!
415 int ath5k_hw_set_bssid_mask(struct ath5k_hw *ah, const u8 *mask)
417 struct ath_common *common = ath5k_hw_common(ah);
419 ATH5K_TRACE(ah->ah_sc);
421 /* Cache bssid mask so that we can restore it
423 memcpy(common->bssidmask, mask, ETH_ALEN);
424 if (ah->ah_version == AR5K_AR5212) {
425 low_id = get_unaligned_le32(mask);
426 high_id = get_unaligned_le16(mask + 4);
428 ath5k_hw_reg_write(ah, low_id, AR5K_BSS_IDM0);
429 ath5k_hw_reg_write(ah, high_id, AR5K_BSS_IDM1);
443 * ath5k_hw_start_rx_pcu - Start RX engine
445 * @ah: The &struct ath5k_hw
447 * Starts RX engine on PCU so that hw can process RXed frames
450 * NOTE: RX DMA should be already enabled using ath5k_hw_start_rx_dma
451 * TODO: Init ANI here
453 void ath5k_hw_start_rx_pcu(struct ath5k_hw *ah)
455 ATH5K_TRACE(ah->ah_sc);
456 AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW, AR5K_DIAG_SW_DIS_RX);
460 * at5k_hw_stop_rx_pcu - Stop RX engine
462 * @ah: The &struct ath5k_hw
464 * Stops RX engine on PCU
466 * TODO: Detach ANI here
468 void ath5k_hw_stop_rx_pcu(struct ath5k_hw *ah)
470 ATH5K_TRACE(ah->ah_sc);
471 AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW, AR5K_DIAG_SW_DIS_RX);
475 * Set multicast filter
477 void ath5k_hw_set_mcast_filter(struct ath5k_hw *ah, u32 filter0, u32 filter1)
479 ATH5K_TRACE(ah->ah_sc);
480 /* Set the multicat filter */
481 ath5k_hw_reg_write(ah, filter0, AR5K_MCAST_FILTER0);
482 ath5k_hw_reg_write(ah, filter1, AR5K_MCAST_FILTER1);
486 * Set multicast filter by index
488 int ath5k_hw_set_mcast_filter_idx(struct ath5k_hw *ah, u32 index)
491 ATH5K_TRACE(ah->ah_sc);
494 else if (index >= 32)
495 AR5K_REG_ENABLE_BITS(ah, AR5K_MCAST_FILTER1,
496 (1 << (index - 32)));
498 AR5K_REG_ENABLE_BITS(ah, AR5K_MCAST_FILTER0, (1 << index));
504 * Clear Multicast filter by index
506 int ath5k_hw_clear_mcast_filter_idx(struct ath5k_hw *ah, u32 index)
509 ATH5K_TRACE(ah->ah_sc);
512 else if (index >= 32)
513 AR5K_REG_DISABLE_BITS(ah, AR5K_MCAST_FILTER1,
514 (1 << (index - 32)));
516 AR5K_REG_DISABLE_BITS(ah, AR5K_MCAST_FILTER0, (1 << index));
522 * ath5k_hw_get_rx_filter - Get current rx filter
524 * @ah: The &struct ath5k_hw
526 * Returns the RX filter by reading rx filter and
527 * phy error filter registers. RX filter is used
528 * to set the allowed frame types that PCU will accept
529 * and pass to the driver. For a list of frame types
532 u32 ath5k_hw_get_rx_filter(struct ath5k_hw *ah)
534 u32 data, filter = 0;
536 ATH5K_TRACE(ah->ah_sc);
537 filter = ath5k_hw_reg_read(ah, AR5K_RX_FILTER);
539 /*Radar detection for 5212*/
540 if (ah->ah_version == AR5K_AR5212) {
541 data = ath5k_hw_reg_read(ah, AR5K_PHY_ERR_FIL);
543 if (data & AR5K_PHY_ERR_FIL_RADAR)
544 filter |= AR5K_RX_FILTER_RADARERR;
545 if (data & (AR5K_PHY_ERR_FIL_OFDM | AR5K_PHY_ERR_FIL_CCK))
546 filter |= AR5K_RX_FILTER_PHYERR;
553 * ath5k_hw_set_rx_filter - Set rx filter
555 * @ah: The &struct ath5k_hw
556 * @filter: RX filter mask (see reg.h)
558 * Sets RX filter register and also handles PHY error filter
559 * register on 5212 and newer chips so that we have proper PHY
562 void ath5k_hw_set_rx_filter(struct ath5k_hw *ah, u32 filter)
566 ATH5K_TRACE(ah->ah_sc);
568 /* Set PHY error filter register on 5212*/
569 if (ah->ah_version == AR5K_AR5212) {
570 if (filter & AR5K_RX_FILTER_RADARERR)
571 data |= AR5K_PHY_ERR_FIL_RADAR;
572 if (filter & AR5K_RX_FILTER_PHYERR)
573 data |= AR5K_PHY_ERR_FIL_OFDM | AR5K_PHY_ERR_FIL_CCK;
577 * The AR5210 uses promiscous mode to detect radar activity
579 if (ah->ah_version == AR5K_AR5210 &&
580 (filter & AR5K_RX_FILTER_RADARERR)) {
581 filter &= ~AR5K_RX_FILTER_RADARERR;
582 filter |= AR5K_RX_FILTER_PROM;
585 /*Zero length DMA (phy error reporting) */
587 AR5K_REG_ENABLE_BITS(ah, AR5K_RXCFG, AR5K_RXCFG_ZLFDMA);
589 AR5K_REG_DISABLE_BITS(ah, AR5K_RXCFG, AR5K_RXCFG_ZLFDMA);
591 /*Write RX Filter register*/
592 ath5k_hw_reg_write(ah, filter & 0xff, AR5K_RX_FILTER);
594 /*Write PHY error filter register on 5212*/
595 if (ah->ah_version == AR5K_AR5212)
596 ath5k_hw_reg_write(ah, data, AR5K_PHY_ERR_FIL);
606 * ath5k_hw_get_tsf32 - Get a 32bit TSF
608 * @ah: The &struct ath5k_hw
610 * Returns lower 32 bits of current TSF
612 u32 ath5k_hw_get_tsf32(struct ath5k_hw *ah)
614 ATH5K_TRACE(ah->ah_sc);
615 return ath5k_hw_reg_read(ah, AR5K_TSF_L32);
619 * ath5k_hw_get_tsf64 - Get the full 64bit TSF
621 * @ah: The &struct ath5k_hw
623 * Returns the current TSF
625 u64 ath5k_hw_get_tsf64(struct ath5k_hw *ah)
627 u64 tsf = ath5k_hw_reg_read(ah, AR5K_TSF_U32);
628 ATH5K_TRACE(ah->ah_sc);
630 return ath5k_hw_reg_read(ah, AR5K_TSF_L32) | (tsf << 32);
634 * ath5k_hw_set_tsf64 - Set a new 64bit TSF
636 * @ah: The &struct ath5k_hw
637 * @tsf64: The new 64bit TSF
641 void ath5k_hw_set_tsf64(struct ath5k_hw *ah, u64 tsf64)
643 ATH5K_TRACE(ah->ah_sc);
645 ath5k_hw_reg_write(ah, tsf64 & 0xffffffff, AR5K_TSF_L32);
646 ath5k_hw_reg_write(ah, (tsf64 >> 32) & 0xffffffff, AR5K_TSF_U32);
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 or Mesh Point mode zero timer0 to start TSF */
722 if (ah->ah_op_mode == NL80211_IFTYPE_AP ||
723 ah->ah_op_mode == NL80211_IFTYPE_MESH_POINT)
724 ath5k_hw_reg_write(ah, 0, AR5K_TIMER0);
726 ath5k_hw_reg_write(ah, next_beacon, AR5K_TIMER0);
727 ath5k_hw_reg_write(ah, timer1, AR5K_TIMER1);
728 ath5k_hw_reg_write(ah, timer2, AR5K_TIMER2);
729 ath5k_hw_reg_write(ah, timer3, AR5K_TIMER3);
731 /* Force a TSF reset if requested and enable beacons */
732 if (interval & AR5K_BEACON_RESET_TSF)
733 ath5k_hw_reset_tsf(ah);
735 ath5k_hw_reg_write(ah, interval & (AR5K_BEACON_PERIOD |
739 /* Flush any pending BMISS interrupts on ISR by
740 * performing a clear-on-write operation on PISR
741 * register for the BMISS bit (writing a bit on
742 * ISR togles a reset for that bit and leaves
743 * the rest bits intact) */
744 if (ah->ah_version == AR5K_AR5210)
745 ath5k_hw_reg_write(ah, AR5K_ISR_BMISS, AR5K_ISR);
747 ath5k_hw_reg_write(ah, AR5K_ISR_BMISS, AR5K_PISR);
749 /* TODO: Set enchanced sleep registers on AR5212
750 * based on vif->bss_conf params, until then
751 * disable power save reporting.*/
752 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_PWR_SV);
760 int ath5k_hw_set_beacon_timers(struct ath5k_hw *ah,
761 const struct ath5k_beacon_state *state)
763 u32 cfp_period, next_cfp, dtim, interval, next_beacon;
766 * TODO: should be changed through *state
767 * review struct ath5k_beacon_state struct
769 * XXX: These are used for cfp period bellow, are they
770 * ok ? Is it O.K. for tsf here to be 0 or should we use
773 u32 dtim_count = 0; /* XXX */
774 u32 cfp_count = 0; /* XXX */
775 u32 tsf = 0; /* XXX */
777 ATH5K_TRACE(ah->ah_sc);
778 /* Return on an invalid beacon state */
779 if (state->bs_interval < 1)
782 interval = state->bs_interval;
783 dtim = state->bs_dtim_period;
788 if (state->bs_cfp_period > 0) {
790 * Enable PCF mode and set the CFP
791 * (Contention Free Period) and timer registers
793 cfp_period = state->bs_cfp_period * state->bs_dtim_period *
795 next_cfp = (cfp_count * state->bs_dtim_period + dtim_count) *
798 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1,
799 AR5K_STA_ID1_DEFAULT_ANTENNA |
801 ath5k_hw_reg_write(ah, cfp_period, AR5K_CFP_PERIOD);
802 ath5k_hw_reg_write(ah, state->bs_cfp_max_duration,
804 ath5k_hw_reg_write(ah, (tsf + (next_cfp == 0 ? cfp_period :
805 next_cfp)) << 3, AR5K_TIMER2);
807 /* Disable PCF mode */
808 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
809 AR5K_STA_ID1_DEFAULT_ANTENNA |
814 * Enable the beacon timer register
816 ath5k_hw_reg_write(ah, state->bs_next_beacon, AR5K_TIMER0);
819 * Start the beacon timers
821 ath5k_hw_reg_write(ah, (ath5k_hw_reg_read(ah, AR5K_BEACON) &
822 ~(AR5K_BEACON_PERIOD | AR5K_BEACON_TIM)) |
823 AR5K_REG_SM(state->bs_tim_offset ? state->bs_tim_offset + 4 : 0,
824 AR5K_BEACON_TIM) | AR5K_REG_SM(state->bs_interval,
825 AR5K_BEACON_PERIOD), AR5K_BEACON);
828 * Write new beacon miss threshold, if it appears to be valid
829 * XXX: Figure out right values for min <= bs_bmiss_threshold <= max
830 * and return if its not in range. We can test this by reading value and
831 * setting value to a largest value and seeing which values register.
834 AR5K_REG_WRITE_BITS(ah, AR5K_RSSI_THR, AR5K_RSSI_THR_BMISS,
835 state->bs_bmiss_threshold);
838 * Set sleep control register
839 * XXX: Didn't find this in 5210 code but since this register
840 * exists also in ar5k's 5210 headers i leave it as common code.
842 AR5K_REG_WRITE_BITS(ah, AR5K_SLEEP_CTL, AR5K_SLEEP_CTL_SLDUR,
843 (state->bs_sleep_duration - 3) << 3);
846 * Set enhanced sleep registers on 5212
848 if (ah->ah_version == AR5K_AR5212) {
849 if (state->bs_sleep_duration > state->bs_interval &&
850 roundup(state->bs_sleep_duration, interval) ==
851 state->bs_sleep_duration)
852 interval = state->bs_sleep_duration;
854 if (state->bs_sleep_duration > dtim && (dtim == 0 ||
855 roundup(state->bs_sleep_duration, dtim) ==
856 state->bs_sleep_duration))
857 dtim = state->bs_sleep_duration;
862 next_beacon = interval == dtim ? state->bs_next_dtim :
863 state->bs_next_beacon;
865 ath5k_hw_reg_write(ah,
866 AR5K_REG_SM((state->bs_next_dtim - 3) << 3,
867 AR5K_SLEEP0_NEXT_DTIM) |
868 AR5K_REG_SM(10, AR5K_SLEEP0_CABTO) |
869 AR5K_SLEEP0_ENH_SLEEP_EN |
870 AR5K_SLEEP0_ASSUME_DTIM, AR5K_SLEEP0);
872 ath5k_hw_reg_write(ah, AR5K_REG_SM((next_beacon - 3) << 3,
873 AR5K_SLEEP1_NEXT_TIM) |
874 AR5K_REG_SM(10, AR5K_SLEEP1_BEACON_TO), AR5K_SLEEP1);
876 ath5k_hw_reg_write(ah,
877 AR5K_REG_SM(interval, AR5K_SLEEP2_TIM_PER) |
878 AR5K_REG_SM(dtim, AR5K_SLEEP2_DTIM_PER), AR5K_SLEEP2);
885 * Reset beacon timers
887 void ath5k_hw_reset_beacon(struct ath5k_hw *ah)
889 ATH5K_TRACE(ah->ah_sc);
891 * Disable beacon timer
893 ath5k_hw_reg_write(ah, 0, AR5K_TIMER0);
896 * Disable some beacon register values
898 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
899 AR5K_STA_ID1_DEFAULT_ANTENNA | AR5K_STA_ID1_PCF);
900 ath5k_hw_reg_write(ah, AR5K_BEACON_PERIOD, AR5K_BEACON);
904 * Wait for beacon queue to finish
906 int ath5k_hw_beaconq_finish(struct ath5k_hw *ah, unsigned long phys_addr)
911 ATH5K_TRACE(ah->ah_sc);
913 /* 5210 doesn't have QCU*/
914 if (ah->ah_version == AR5K_AR5210) {
916 * Wait for beaconn queue to finish by checking
917 * Control Register and Beacon Status Register.
919 for (i = AR5K_TUNE_BEACON_INTERVAL / 2; i > 0; i--) {
920 if (!(ath5k_hw_reg_read(ah, AR5K_BSR) & AR5K_BSR_TXQ1F)
922 !(ath5k_hw_reg_read(ah, AR5K_CR) & AR5K_BSR_TXQ1F))
930 * Re-schedule the beacon queue
932 ath5k_hw_reg_write(ah, phys_addr, AR5K_NOQCU_TXDP1);
933 ath5k_hw_reg_write(ah, AR5K_BCR_TQ1V | AR5K_BCR_BDMAE,
941 ret = ath5k_hw_register_timeout(ah,
942 AR5K_QUEUE_STATUS(AR5K_TX_QUEUE_ID_BEACON),
943 AR5K_QCU_STS_FRMPENDCNT, 0, false);
945 if (AR5K_REG_READ_Q(ah, AR5K_QCU_TXE, AR5K_TX_QUEUE_ID_BEACON))
954 /*********************\
955 * Key table functions *
956 \*********************/
959 * Reset a key entry on the table
961 int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry)
963 unsigned int i, type;
964 u16 micentry = entry + AR5K_KEYTABLE_MIC_OFFSET;
966 ATH5K_TRACE(ah->ah_sc);
967 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
969 type = ath5k_hw_reg_read(ah, AR5K_KEYTABLE_TYPE(entry));
971 for (i = 0; i < AR5K_KEYCACHE_SIZE; i++)
972 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_OFF(entry, i));
974 /* Reset associated MIC entry if TKIP
975 * is enabled located at offset (entry + 64) */
976 if (type == AR5K_KEYTABLE_TYPE_TKIP) {
977 AR5K_ASSERT_ENTRY(micentry, AR5K_KEYTABLE_SIZE);
978 for (i = 0; i < AR5K_KEYCACHE_SIZE / 2 ; i++)
979 ath5k_hw_reg_write(ah, 0,
980 AR5K_KEYTABLE_OFF(micentry, i));
984 * Set NULL encryption on AR5212+
986 * Note: AR5K_KEYTABLE_TYPE -> AR5K_KEYTABLE_OFF(entry, 5)
987 * AR5K_KEYTABLE_TYPE_NULL -> 0x00000007
989 * Note2: Windows driver (ndiswrapper) sets this to
990 * 0x00000714 instead of 0x00000007
992 if (ah->ah_version >= AR5K_AR5211) {
993 ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
994 AR5K_KEYTABLE_TYPE(entry));
996 if (type == AR5K_KEYTABLE_TYPE_TKIP) {
997 ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
998 AR5K_KEYTABLE_TYPE(micentry));
1006 * Check if a table entry is valid
1008 int ath5k_hw_is_key_valid(struct ath5k_hw *ah, u16 entry)
1010 ATH5K_TRACE(ah->ah_sc);
1011 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
1013 /* Check the validation flag at the end of the entry */
1014 return ath5k_hw_reg_read(ah, AR5K_KEYTABLE_MAC1(entry)) &
1015 AR5K_KEYTABLE_VALID;
1019 int ath5k_keycache_type(const struct ieee80211_key_conf *key)
1023 return AR5K_KEYTABLE_TYPE_TKIP;
1025 return AR5K_KEYTABLE_TYPE_CCM;
1027 if (key->keylen == WLAN_KEY_LEN_WEP40)
1028 return AR5K_KEYTABLE_TYPE_40;
1029 else if (key->keylen == WLAN_KEY_LEN_WEP104)
1030 return AR5K_KEYTABLE_TYPE_104;
1039 * Set a key entry on the table
1041 int ath5k_hw_set_key(struct ath5k_hw *ah, u16 entry,
1042 const struct ieee80211_key_conf *key, const u8 *mac)
1046 __le32 key_v[5] = {};
1047 __le32 key0 = 0, key1 = 0;
1048 __le32 *rxmic, *txmic;
1050 u16 micentry = entry + AR5K_KEYTABLE_MIC_OFFSET;
1054 ATH5K_TRACE(ah->ah_sc);
1056 is_tkip = (key->alg == ALG_TKIP);
1059 * key->keylen comes in from mac80211 in bytes.
1060 * TKIP is 128 bit + 128 bit mic
1062 keylen = (is_tkip) ? (128 / 8) : key->keylen;
1064 if (entry > AR5K_KEYTABLE_SIZE ||
1065 (is_tkip && micentry > AR5K_KEYTABLE_SIZE))
1068 if (unlikely(keylen > 16))
1071 keytype = ath5k_keycache_type(key);
1076 * each key block is 6 bytes wide, written as pairs of
1077 * alternating 32 and 16 bit le values.
1080 for (i = 0; keylen >= 6; keylen -= 6) {
1081 memcpy(&key_v[i], key_ptr, 6);
1086 memcpy(&key_v[i], key_ptr, keylen);
1088 /* intentionally corrupt key until mic is installed */
1090 key0 = key_v[0] = ~key_v[0];
1091 key1 = key_v[1] = ~key_v[1];
1094 for (i = 0; i < ARRAY_SIZE(key_v); i++)
1095 ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
1096 AR5K_KEYTABLE_OFF(entry, i));
1098 ath5k_hw_reg_write(ah, keytype, AR5K_KEYTABLE_TYPE(entry));
1101 /* Install rx/tx MIC */
1102 rxmic = (__le32 *) &key->key[16];
1103 txmic = (__le32 *) &key->key[24];
1105 if (ah->ah_combined_mic) {
1106 key_v[0] = rxmic[0];
1107 key_v[1] = cpu_to_le32(le32_to_cpu(txmic[0]) >> 16);
1108 key_v[2] = rxmic[1];
1109 key_v[3] = cpu_to_le32(le32_to_cpu(txmic[0]) & 0xffff);
1110 key_v[4] = txmic[1];
1112 key_v[0] = rxmic[0];
1114 key_v[2] = rxmic[1];
1118 for (i = 0; i < ARRAY_SIZE(key_v); i++)
1119 ath5k_hw_reg_write(ah, le32_to_cpu(key_v[i]),
1120 AR5K_KEYTABLE_OFF(micentry, i));
1122 ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
1123 AR5K_KEYTABLE_TYPE(micentry));
1124 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_MAC0(micentry));
1125 ath5k_hw_reg_write(ah, 0, AR5K_KEYTABLE_MAC1(micentry));
1127 /* restore first 2 words of key */
1128 ath5k_hw_reg_write(ah, le32_to_cpu(~key0),
1129 AR5K_KEYTABLE_OFF(entry, 0));
1130 ath5k_hw_reg_write(ah, le32_to_cpu(~key1),
1131 AR5K_KEYTABLE_OFF(entry, 1));
1134 return ath5k_hw_set_key_lladdr(ah, entry, mac);
1137 int ath5k_hw_set_key_lladdr(struct ath5k_hw *ah, u16 entry, const u8 *mac)
1139 u32 low_id, high_id;
1141 ATH5K_TRACE(ah->ah_sc);
1142 /* Invalid entry (key table overflow) */
1143 AR5K_ASSERT_ENTRY(entry, AR5K_KEYTABLE_SIZE);
1146 * MAC may be NULL if it's a broadcast key. In this case no need to
1147 * to compute get_unaligned_le32 and get_unaligned_le16 as we
1151 low_id = 0xffffffff;
1152 high_id = 0xffff | AR5K_KEYTABLE_VALID;
1154 low_id = get_unaligned_le32(mac);
1155 high_id = get_unaligned_le16(mac + 4) | AR5K_KEYTABLE_VALID;
1158 ath5k_hw_reg_write(ah, low_id, AR5K_KEYTABLE_MAC0(entry));
1159 ath5k_hw_reg_write(ah, high_id, AR5K_KEYTABLE_MAC1(entry));