2 * Copyright (c) 2004-2007 Reyk Floeter <reyk@openbsd.org>
3 * Copyright (c) 2006-2009 Nick Kossifidis <mickflemm@gmail.com>
4 * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
5 * Copyright (c) 2008-2009 Felix Fietkau <nbd@openwrt.org>
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 /***********************\
22 * PHY related functions *
23 \***********************/
25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27 #include <linux/delay.h>
28 #include <linux/slab.h>
29 #include <asm/unaligned.h>
39 * DOC: PHY related functions
41 * Here we handle the low-level functions related to baseband
42 * and analog frontend (RF) parts. This is by far the most complex
43 * part of the hw code so make sure you know what you are doing.
45 * Here is a list of what this is all about:
47 * - Channel setting/switching
49 * - Automatic Gain Control (AGC) calibration
51 * - Noise Floor calibration
53 * - I/Q imbalance calibration (QAM correction)
55 * - Calibration due to thermal changes (gain_F)
57 * - Spur noise mitigation
59 * - RF/PHY initialization for the various operating modes and bwmodes
63 * - TX power control per channel/rate/packet type
65 * Also have in mind we never got documentation for most of these
66 * functions, what we have comes mostly from Atheros's code, reverse
67 * engineering and patent docs/presentations etc.
76 * ath5k_hw_radio_revision() - Get the PHY Chip revision
77 * @ah: The &struct ath5k_hw
78 * @band: One of enum nl80211_band
80 * Returns the revision number of a 2GHz, 5GHz or single chip
84 ath5k_hw_radio_revision(struct ath5k_hw *ah, enum nl80211_band band)
91 * Set the radio chip access register
94 case NL80211_BAND_2GHZ:
95 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_2GHZ, AR5K_PHY(0));
97 case NL80211_BAND_5GHZ:
98 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
104 usleep_range(2000, 2500);
106 /* ...wait until PHY is ready and read the selected radio revision */
107 ath5k_hw_reg_write(ah, 0x00001c16, AR5K_PHY(0x34));
109 for (i = 0; i < 8; i++)
110 ath5k_hw_reg_write(ah, 0x00010000, AR5K_PHY(0x20));
112 if (ah->ah_version == AR5K_AR5210) {
113 srev = (ath5k_hw_reg_read(ah, AR5K_PHY(256)) >> 28) & 0xf;
114 ret = (u16)ath5k_hw_bitswap(srev, 4) + 1;
116 srev = (ath5k_hw_reg_read(ah, AR5K_PHY(0x100)) >> 24) & 0xff;
117 ret = (u16)ath5k_hw_bitswap(((srev & 0xf0) >> 4) |
118 ((srev & 0x0f) << 4), 8);
121 /* Reset to the 5GHz mode */
122 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
128 * ath5k_channel_ok() - Check if a channel is supported by the hw
129 * @ah: The &struct ath5k_hw
130 * @channel: The &struct ieee80211_channel
132 * Note: We don't do any regulatory domain checks here, it's just
136 ath5k_channel_ok(struct ath5k_hw *ah, struct ieee80211_channel *channel)
138 u16 freq = channel->center_freq;
140 /* Check if the channel is in our supported range */
141 if (channel->band == NL80211_BAND_2GHZ) {
142 if ((freq >= ah->ah_capabilities.cap_range.range_2ghz_min) &&
143 (freq <= ah->ah_capabilities.cap_range.range_2ghz_max))
145 } else if (channel->band == NL80211_BAND_5GHZ)
146 if ((freq >= ah->ah_capabilities.cap_range.range_5ghz_min) &&
147 (freq <= ah->ah_capabilities.cap_range.range_5ghz_max))
154 * ath5k_hw_chan_has_spur_noise() - Check if channel is sensitive to spur noise
155 * @ah: The &struct ath5k_hw
156 * @channel: The &struct ieee80211_channel
159 ath5k_hw_chan_has_spur_noise(struct ath5k_hw *ah,
160 struct ieee80211_channel *channel)
164 if ((ah->ah_radio == AR5K_RF5112) ||
165 (ah->ah_radio == AR5K_RF5413) ||
166 (ah->ah_radio == AR5K_RF2413) ||
167 (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4)))
172 if ((channel->center_freq % refclk_freq != 0) &&
173 ((channel->center_freq % refclk_freq < 10) ||
174 (channel->center_freq % refclk_freq > 22)))
181 * ath5k_hw_rfb_op() - Perform an operation on the given RF Buffer
182 * @ah: The &struct ath5k_hw
183 * @rf_regs: The struct ath5k_rf_reg
185 * @reg_id: RF register ID
186 * @set: Indicate we need to swap data
188 * This is an internal function used to modify RF Banks before
189 * writing them to AR5K_RF_BUFFER. Check out rfbuffer.h for more
193 ath5k_hw_rfb_op(struct ath5k_hw *ah, const struct ath5k_rf_reg *rf_regs,
194 u32 val, u8 reg_id, bool set)
196 const struct ath5k_rf_reg *rfreg = NULL;
197 u8 offset, bank, num_bits, col, position;
199 u32 mask, data, last_bit, bits_shifted, first_bit;
205 rfb = ah->ah_rf_banks;
207 for (i = 0; i < ah->ah_rf_regs_count; i++) {
208 if (rf_regs[i].index == reg_id) {
214 if (rfb == NULL || rfreg == NULL) {
215 ATH5K_PRINTF("Rf register not found!\n");
216 /* should not happen */
221 num_bits = rfreg->field.len;
222 first_bit = rfreg->field.pos;
223 col = rfreg->field.col;
225 /* first_bit is an offset from bank's
226 * start. Since we have all banks on
227 * the same array, we use this offset
228 * to mark each bank's start */
229 offset = ah->ah_offset[bank];
232 if (!(col <= 3 && num_bits <= 32 && first_bit + num_bits <= 319)) {
233 ATH5K_PRINTF("invalid values at offset %u\n", offset);
237 entry = ((first_bit - 1) / 8) + offset;
238 position = (first_bit - 1) % 8;
241 data = ath5k_hw_bitswap(val, num_bits);
243 for (bits_shifted = 0, bits_left = num_bits; bits_left > 0;
244 position = 0, entry++) {
246 last_bit = (position + bits_left > 8) ? 8 :
247 position + bits_left;
249 mask = (((1 << last_bit) - 1) ^ ((1 << position) - 1)) <<
254 rfb[entry] |= ((data << position) << (col * 8)) & mask;
255 data >>= (8 - position);
257 data |= (((rfb[entry] & mask) >> (col * 8)) >> position)
259 bits_shifted += last_bit - position;
262 bits_left -= 8 - position;
265 data = set ? 1 : ath5k_hw_bitswap(data, num_bits);
271 * ath5k_hw_write_ofdm_timings() - set OFDM timings on AR5212
272 * @ah: the &struct ath5k_hw
273 * @channel: the currently set channel upon reset
275 * Write the delta slope coefficient (used on pilot tracking ?) for OFDM
276 * operation on the AR5212 upon reset. This is a helper for ath5k_hw_phy_init.
278 * Since delta slope is floating point we split it on its exponent and
279 * mantissa and provide these values on hw.
281 * For more infos i think this patent is related
282 * "http://www.freepatentsonline.com/7184495.html"
285 ath5k_hw_write_ofdm_timings(struct ath5k_hw *ah,
286 struct ieee80211_channel *channel)
288 /* Get exponent and mantissa and set it */
289 u32 coef_scaled, coef_exp, coef_man,
290 ds_coef_exp, ds_coef_man, clock;
292 BUG_ON(!(ah->ah_version == AR5K_AR5212) ||
293 (channel->hw_value == AR5K_MODE_11B));
296 * ALGO: coef = (5 * clock / carrier_freq) / 2
297 * we scale coef by shifting clock value by 24 for
298 * better precision since we use integers */
299 switch (ah->ah_bwmode) {
300 case AR5K_BWMODE_40MHZ:
303 case AR5K_BWMODE_10MHZ:
306 case AR5K_BWMODE_5MHZ:
313 coef_scaled = ((5 * (clock << 24)) / 2) / channel->center_freq;
316 * ALGO: coef_exp = 14 - highest set bit position */
317 coef_exp = ilog2(coef_scaled);
319 /* Doesn't make sense if it's zero*/
320 if (!coef_scaled || !coef_exp)
323 /* Note: we've shifted coef_scaled by 24 */
324 coef_exp = 14 - (coef_exp - 24);
327 /* Get mantissa (significant digits)
328 * ALGO: coef_mant = floor(coef_scaled* 2^coef_exp+0.5) */
329 coef_man = coef_scaled +
330 (1 << (24 - coef_exp - 1));
332 /* Calculate delta slope coefficient exponent
333 * and mantissa (remove scaling) and set them on hw */
334 ds_coef_man = coef_man >> (24 - coef_exp);
335 ds_coef_exp = coef_exp - 16;
337 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_3,
338 AR5K_PHY_TIMING_3_DSC_MAN, ds_coef_man);
339 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_3,
340 AR5K_PHY_TIMING_3_DSC_EXP, ds_coef_exp);
346 * ath5k_hw_phy_disable() - Disable PHY
347 * @ah: The &struct ath5k_hw
349 int ath5k_hw_phy_disable(struct ath5k_hw *ah)
352 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT);
358 * ath5k_hw_wait_for_synth() - Wait for synth to settle
359 * @ah: The &struct ath5k_hw
360 * @channel: The &struct ieee80211_channel
363 ath5k_hw_wait_for_synth(struct ath5k_hw *ah,
364 struct ieee80211_channel *channel)
367 * On 5211+ read activation -> rx delay
368 * and use it (100ns steps).
370 if (ah->ah_version != AR5K_AR5210) {
372 delay = ath5k_hw_reg_read(ah, AR5K_PHY_RX_DELAY) &
374 delay = (channel->hw_value == AR5K_MODE_11B) ?
375 ((delay << 2) / 22) : (delay / 10);
376 if (ah->ah_bwmode == AR5K_BWMODE_10MHZ)
378 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ)
380 /* XXX: /2 on turbo ? Let's be safe
382 usleep_range(100 + delay, 100 + (2 * delay));
384 usleep_range(1000, 1500);
389 /**********************\
390 * RF Gain optimization *
391 \**********************/
394 * DOC: RF Gain optimization
396 * This code is used to optimize RF gain on different environments
397 * (temperature mostly) based on feedback from a power detector.
399 * It's only used on RF5111 and RF5112, later RF chips seem to have
400 * auto adjustment on hw -notice they have a much smaller BANK 7 and
401 * no gain optimization ladder-.
403 * For more infos check out this patent doc
404 * "http://www.freepatentsonline.com/7400691.html"
406 * This paper describes power drops as seen on the receiver due to
408 * "http://www.cnri.dit.ie/publications/ICT08%20-%20Practical%20Issues
409 * %20of%20Power%20Control.pdf"
411 * And this is the MadWiFi bug entry related to the above
412 * "http://madwifi-project.org/ticket/1659"
413 * with various measurements and diagrams
417 * ath5k_hw_rfgain_opt_init() - Initialize ah_gain during attach
418 * @ah: The &struct ath5k_hw
420 int ath5k_hw_rfgain_opt_init(struct ath5k_hw *ah)
422 /* Initialize the gain optimization values */
423 switch (ah->ah_radio) {
425 ah->ah_gain.g_step_idx = rfgain_opt_5111.go_default;
426 ah->ah_gain.g_low = 20;
427 ah->ah_gain.g_high = 35;
428 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
431 ah->ah_gain.g_step_idx = rfgain_opt_5112.go_default;
432 ah->ah_gain.g_low = 20;
433 ah->ah_gain.g_high = 85;
434 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
444 * ath5k_hw_request_rfgain_probe() - Request a PAPD probe packet
445 * @ah: The &struct ath5k_hw
447 * Schedules a gain probe check on the next transmitted packet.
448 * That means our next packet is going to be sent with lower
449 * tx power and a Peak to Average Power Detector (PAPD) will try
450 * to measure the gain.
452 * TODO: Force a tx packet (bypassing PCU arbitrator etc)
453 * just after we enable the probe so that we don't mess with
457 ath5k_hw_request_rfgain_probe(struct ath5k_hw *ah)
460 /* Skip if gain calibration is inactive or
461 * we already handle a probe request */
462 if (ah->ah_gain.g_state != AR5K_RFGAIN_ACTIVE)
465 /* Send the packet with 2dB below max power as
466 * patent doc suggest */
467 ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txpower.txp_ofdm - 4,
468 AR5K_PHY_PAPD_PROBE_TXPOWER) |
469 AR5K_PHY_PAPD_PROBE_TX_NEXT, AR5K_PHY_PAPD_PROBE);
471 ah->ah_gain.g_state = AR5K_RFGAIN_READ_REQUESTED;
476 * ath5k_hw_rf_gainf_corr() - Calculate Gain_F measurement correction
477 * @ah: The &struct ath5k_hw
479 * Calculate Gain_F measurement correction
480 * based on the current step for RF5112 rev. 2
483 ath5k_hw_rf_gainf_corr(struct ath5k_hw *ah)
487 const struct ath5k_gain_opt *go;
488 const struct ath5k_gain_opt_step *g_step;
489 const struct ath5k_rf_reg *rf_regs;
491 /* Only RF5112 Rev. 2 supports it */
492 if ((ah->ah_radio != AR5K_RF5112) ||
493 (ah->ah_radio_5ghz_revision <= AR5K_SREV_RAD_5112A))
496 go = &rfgain_opt_5112;
497 rf_regs = rf_regs_5112a;
498 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112a);
500 g_step = &go->go_step[ah->ah_gain.g_step_idx];
502 if (ah->ah_rf_banks == NULL)
505 rf = ah->ah_rf_banks;
506 ah->ah_gain.g_f_corr = 0;
508 /* No VGA (Variable Gain Amplifier) override, skip */
509 if (ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXVGA_OVR, false) != 1)
512 /* Mix gain stepping */
513 step = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXGAIN_STEP, false);
515 /* Mix gain override */
516 mix = g_step->gos_param[0];
520 ah->ah_gain.g_f_corr = step * 2;
523 ah->ah_gain.g_f_corr = (step - 5) * 2;
526 ah->ah_gain.g_f_corr = step;
529 ah->ah_gain.g_f_corr = 0;
533 return ah->ah_gain.g_f_corr;
537 * ath5k_hw_rf_check_gainf_readback() - Validate Gain_F feedback from detector
538 * @ah: The &struct ath5k_hw
540 * Check if current gain_F measurement is in the range of our
541 * power detector windows. If we get a measurement outside range
542 * we know it's not accurate (detectors can't measure anything outside
543 * their detection window) so we must ignore it.
545 * Returns true if readback was O.K. or false on failure
548 ath5k_hw_rf_check_gainf_readback(struct ath5k_hw *ah)
550 const struct ath5k_rf_reg *rf_regs;
551 u32 step, mix_ovr, level[4];
554 if (ah->ah_rf_banks == NULL)
557 rf = ah->ah_rf_banks;
559 if (ah->ah_radio == AR5K_RF5111) {
561 rf_regs = rf_regs_5111;
562 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5111);
564 step = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_RFGAIN_STEP,
568 level[1] = (step == 63) ? 50 : step + 4;
569 level[2] = (step != 63) ? 64 : level[0];
570 level[3] = level[2] + 50;
572 ah->ah_gain.g_high = level[3] -
573 (step == 63 ? AR5K_GAIN_DYN_ADJUST_HI_MARGIN : -5);
574 ah->ah_gain.g_low = level[0] +
575 (step == 63 ? AR5K_GAIN_DYN_ADJUST_LO_MARGIN : 0);
578 rf_regs = rf_regs_5112;
579 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112);
581 mix_ovr = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXVGA_OVR,
584 level[0] = level[2] = 0;
587 level[1] = level[3] = 83;
589 level[1] = level[3] = 107;
590 ah->ah_gain.g_high = 55;
594 return (ah->ah_gain.g_current >= level[0] &&
595 ah->ah_gain.g_current <= level[1]) ||
596 (ah->ah_gain.g_current >= level[2] &&
597 ah->ah_gain.g_current <= level[3]);
601 * ath5k_hw_rf_gainf_adjust() - Perform Gain_F adjustment
602 * @ah: The &struct ath5k_hw
604 * Choose the right target gain based on current gain
605 * and RF gain optimization ladder
608 ath5k_hw_rf_gainf_adjust(struct ath5k_hw *ah)
610 const struct ath5k_gain_opt *go;
611 const struct ath5k_gain_opt_step *g_step;
614 switch (ah->ah_radio) {
616 go = &rfgain_opt_5111;
619 go = &rfgain_opt_5112;
625 g_step = &go->go_step[ah->ah_gain.g_step_idx];
627 if (ah->ah_gain.g_current >= ah->ah_gain.g_high) {
629 /* Reached maximum */
630 if (ah->ah_gain.g_step_idx == 0)
633 for (ah->ah_gain.g_target = ah->ah_gain.g_current;
634 ah->ah_gain.g_target >= ah->ah_gain.g_high &&
635 ah->ah_gain.g_step_idx > 0;
636 g_step = &go->go_step[ah->ah_gain.g_step_idx])
637 ah->ah_gain.g_target -= 2 *
638 (go->go_step[--(ah->ah_gain.g_step_idx)].gos_gain -
645 if (ah->ah_gain.g_current <= ah->ah_gain.g_low) {
647 /* Reached minimum */
648 if (ah->ah_gain.g_step_idx == (go->go_steps_count - 1))
651 for (ah->ah_gain.g_target = ah->ah_gain.g_current;
652 ah->ah_gain.g_target <= ah->ah_gain.g_low &&
653 ah->ah_gain.g_step_idx < go->go_steps_count - 1;
654 g_step = &go->go_step[ah->ah_gain.g_step_idx])
655 ah->ah_gain.g_target -= 2 *
656 (go->go_step[++ah->ah_gain.g_step_idx].gos_gain -
664 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
665 "ret %d, gain step %u, current gain %u, target gain %u\n",
666 ret, ah->ah_gain.g_step_idx, ah->ah_gain.g_current,
667 ah->ah_gain.g_target);
673 * ath5k_hw_gainf_calibrate() - Do a gain_F calibration
674 * @ah: The &struct ath5k_hw
676 * Main callback for thermal RF gain calibration engine
677 * Check for a new gain reading and schedule an adjustment
680 * Returns one of enum ath5k_rfgain codes
683 ath5k_hw_gainf_calibrate(struct ath5k_hw *ah)
686 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
688 if (ah->ah_rf_banks == NULL ||
689 ah->ah_gain.g_state == AR5K_RFGAIN_INACTIVE)
690 return AR5K_RFGAIN_INACTIVE;
692 /* No check requested, either engine is inactive
693 * or an adjustment is already requested */
694 if (ah->ah_gain.g_state != AR5K_RFGAIN_READ_REQUESTED)
697 /* Read the PAPD (Peak to Average Power Detector)
699 data = ath5k_hw_reg_read(ah, AR5K_PHY_PAPD_PROBE);
701 /* No probe is scheduled, read gain_F measurement */
702 if (!(data & AR5K_PHY_PAPD_PROBE_TX_NEXT)) {
703 ah->ah_gain.g_current = data >> AR5K_PHY_PAPD_PROBE_GAINF_S;
704 type = AR5K_REG_MS(data, AR5K_PHY_PAPD_PROBE_TYPE);
706 /* If tx packet is CCK correct the gain_F measurement
707 * by cck ofdm gain delta */
708 if (type == AR5K_PHY_PAPD_PROBE_TYPE_CCK) {
709 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A)
710 ah->ah_gain.g_current +=
711 ee->ee_cck_ofdm_gain_delta;
713 ah->ah_gain.g_current +=
714 AR5K_GAIN_CCK_PROBE_CORR;
717 /* Further correct gain_F measurement for
719 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) {
720 ath5k_hw_rf_gainf_corr(ah);
721 ah->ah_gain.g_current =
722 ah->ah_gain.g_current >= ah->ah_gain.g_f_corr ?
723 (ah->ah_gain.g_current - ah->ah_gain.g_f_corr) :
727 /* Check if measurement is ok and if we need
728 * to adjust gain, schedule a gain adjustment,
729 * else switch back to the active state */
730 if (ath5k_hw_rf_check_gainf_readback(ah) &&
731 AR5K_GAIN_CHECK_ADJUST(&ah->ah_gain) &&
732 ath5k_hw_rf_gainf_adjust(ah)) {
733 ah->ah_gain.g_state = AR5K_RFGAIN_NEED_CHANGE;
735 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
740 return ah->ah_gain.g_state;
744 * ath5k_hw_rfgain_init() - Write initial RF gain settings to hw
745 * @ah: The &struct ath5k_hw
746 * @band: One of enum nl80211_band
748 * Write initial RF gain table to set the RF sensitivity.
750 * NOTE: This one works on all RF chips and has nothing to do
751 * with Gain_F calibration
754 ath5k_hw_rfgain_init(struct ath5k_hw *ah, enum nl80211_band band)
756 const struct ath5k_ini_rfgain *ath5k_rfg;
757 unsigned int i, size, index;
759 switch (ah->ah_radio) {
761 ath5k_rfg = rfgain_5111;
762 size = ARRAY_SIZE(rfgain_5111);
765 ath5k_rfg = rfgain_5112;
766 size = ARRAY_SIZE(rfgain_5112);
769 ath5k_rfg = rfgain_2413;
770 size = ARRAY_SIZE(rfgain_2413);
773 ath5k_rfg = rfgain_2316;
774 size = ARRAY_SIZE(rfgain_2316);
777 ath5k_rfg = rfgain_5413;
778 size = ARRAY_SIZE(rfgain_5413);
782 ath5k_rfg = rfgain_2425;
783 size = ARRAY_SIZE(rfgain_2425);
789 index = (band == NL80211_BAND_2GHZ) ? 1 : 0;
791 for (i = 0; i < size; i++) {
793 ath5k_hw_reg_write(ah, ath5k_rfg[i].rfg_value[index],
794 (u32)ath5k_rfg[i].rfg_register);
801 /********************\
802 * RF Registers setup *
803 \********************/
806 * ath5k_hw_rfregs_init() - Initialize RF register settings
807 * @ah: The &struct ath5k_hw
808 * @channel: The &struct ieee80211_channel
809 * @mode: One of enum ath5k_driver_mode
811 * Setup RF registers by writing RF buffer on hw. For
812 * more infos on this, check out rfbuffer.h
815 ath5k_hw_rfregs_init(struct ath5k_hw *ah,
816 struct ieee80211_channel *channel,
819 const struct ath5k_rf_reg *rf_regs;
820 const struct ath5k_ini_rfbuffer *ini_rfb;
821 const struct ath5k_gain_opt *go = NULL;
822 const struct ath5k_gain_opt_step *g_step;
823 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
826 int i, obdb = -1, bank = -1;
828 switch (ah->ah_radio) {
830 rf_regs = rf_regs_5111;
831 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5111);
833 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5111);
834 go = &rfgain_opt_5111;
837 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) {
838 rf_regs = rf_regs_5112a;
839 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112a);
841 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5112a);
843 rf_regs = rf_regs_5112;
844 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112);
846 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5112);
848 go = &rfgain_opt_5112;
851 rf_regs = rf_regs_2413;
852 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2413);
854 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2413);
857 rf_regs = rf_regs_2316;
858 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2316);
860 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2316);
863 rf_regs = rf_regs_5413;
864 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5413);
866 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5413);
869 rf_regs = rf_regs_2425;
870 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2425);
872 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2317);
875 rf_regs = rf_regs_2425;
876 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2425);
877 if (ah->ah_mac_srev < AR5K_SREV_AR2417) {
879 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2425);
882 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2417);
889 /* If it's the first time we set RF buffer, allocate
890 * ah->ah_rf_banks based on ah->ah_rf_banks_size
892 if (ah->ah_rf_banks == NULL) {
893 ah->ah_rf_banks = kmalloc_array(ah->ah_rf_banks_size,
896 if (ah->ah_rf_banks == NULL) {
897 ATH5K_ERR(ah, "out of memory\n");
902 /* Copy values to modify them */
903 rfb = ah->ah_rf_banks;
905 for (i = 0; i < ah->ah_rf_banks_size; i++) {
906 if (ini_rfb[i].rfb_bank >= AR5K_MAX_RF_BANKS) {
907 ATH5K_ERR(ah, "invalid bank\n");
911 /* Bank changed, write down the offset */
912 if (bank != ini_rfb[i].rfb_bank) {
913 bank = ini_rfb[i].rfb_bank;
914 ah->ah_offset[bank] = i;
917 rfb[i] = ini_rfb[i].rfb_mode_data[mode];
920 /* Set Output and Driver bias current (OB/DB) */
921 if (channel->band == NL80211_BAND_2GHZ) {
923 if (channel->hw_value == AR5K_MODE_11B)
924 ee_mode = AR5K_EEPROM_MODE_11B;
926 ee_mode = AR5K_EEPROM_MODE_11G;
928 /* For RF511X/RF211X combination we
929 * use b_OB and b_DB parameters stored
930 * in eeprom on ee->ee_ob[ee_mode][0]
932 * For all other chips we use OB/DB for 2GHz
933 * stored in the b/g modal section just like
934 * 802.11a on ee->ee_ob[ee_mode][1] */
935 if ((ah->ah_radio == AR5K_RF5111) ||
936 (ah->ah_radio == AR5K_RF5112))
941 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb],
942 AR5K_RF_OB_2GHZ, true);
944 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb],
945 AR5K_RF_DB_2GHZ, true);
947 /* RF5111 always needs OB/DB for 5GHz, even if we use 2GHz */
948 } else if ((channel->band == NL80211_BAND_5GHZ) ||
949 (ah->ah_radio == AR5K_RF5111)) {
951 /* For 11a, Turbo and XR we need to choose
952 * OB/DB based on frequency range */
953 ee_mode = AR5K_EEPROM_MODE_11A;
954 obdb = channel->center_freq >= 5725 ? 3 :
955 (channel->center_freq >= 5500 ? 2 :
956 (channel->center_freq >= 5260 ? 1 :
957 (channel->center_freq > 4000 ? 0 : -1)));
962 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb],
963 AR5K_RF_OB_5GHZ, true);
965 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb],
966 AR5K_RF_DB_5GHZ, true);
969 g_step = &go->go_step[ah->ah_gain.g_step_idx];
971 /* Set turbo mode (N/A on RF5413) */
972 if ((ah->ah_bwmode == AR5K_BWMODE_40MHZ) &&
973 (ah->ah_radio != AR5K_RF5413))
974 ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_TURBO, false);
976 /* Bank Modifications (chip-specific) */
977 if (ah->ah_radio == AR5K_RF5111) {
979 /* Set gain_F settings according to current step */
980 if (channel->hw_value != AR5K_MODE_11B) {
982 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_FRAME_CTL,
983 AR5K_PHY_FRAME_CTL_TX_CLIP,
984 g_step->gos_param[0]);
986 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1],
987 AR5K_RF_PWD_90, true);
989 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2],
990 AR5K_RF_PWD_84, true);
992 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3],
993 AR5K_RF_RFGAIN_SEL, true);
995 /* We programmed gain_F parameters, switch back
997 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
1001 /* Bank 6/7 setup */
1003 ath5k_hw_rfb_op(ah, rf_regs, !ee->ee_xpd[ee_mode],
1004 AR5K_RF_PWD_XPD, true);
1006 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_x_gain[ee_mode],
1007 AR5K_RF_XPD_GAIN, true);
1009 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode],
1010 AR5K_RF_GAIN_I, true);
1012 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode],
1013 AR5K_RF_PLO_SEL, true);
1015 /* Tweak power detectors for half/quarter rate support */
1016 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ ||
1017 ah->ah_bwmode == AR5K_BWMODE_10MHZ) {
1020 ath5k_hw_rfb_op(ah, rf_regs, 0x1f,
1021 AR5K_RF_WAIT_S, true);
1023 wait_i = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ?
1026 ath5k_hw_rfb_op(ah, rf_regs, wait_i,
1027 AR5K_RF_WAIT_I, true);
1028 ath5k_hw_rfb_op(ah, rf_regs, 3,
1029 AR5K_RF_MAX_TIME, true);
1034 if (ah->ah_radio == AR5K_RF5112) {
1036 /* Set gain_F settings according to current step */
1037 if (channel->hw_value != AR5K_MODE_11B) {
1039 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[0],
1040 AR5K_RF_MIXGAIN_OVR, true);
1042 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1],
1043 AR5K_RF_PWD_138, true);
1045 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2],
1046 AR5K_RF_PWD_137, true);
1048 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3],
1049 AR5K_RF_PWD_136, true);
1051 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[4],
1052 AR5K_RF_PWD_132, true);
1054 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[5],
1055 AR5K_RF_PWD_131, true);
1057 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[6],
1058 AR5K_RF_PWD_130, true);
1060 /* We programmed gain_F parameters, switch back
1061 * to active state */
1062 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
1065 /* Bank 6/7 setup */
1067 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode],
1068 AR5K_RF_XPD_SEL, true);
1070 if (ah->ah_radio_5ghz_revision < AR5K_SREV_RAD_5112A) {
1071 /* Rev. 1 supports only one xpd */
1072 ath5k_hw_rfb_op(ah, rf_regs,
1073 ee->ee_x_gain[ee_mode],
1074 AR5K_RF_XPD_GAIN, true);
1077 u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode];
1078 if (ee->ee_pd_gains[ee_mode] > 1) {
1079 ath5k_hw_rfb_op(ah, rf_regs,
1080 pdg_curve_to_idx[0],
1081 AR5K_RF_PD_GAIN_LO, true);
1082 ath5k_hw_rfb_op(ah, rf_regs,
1083 pdg_curve_to_idx[1],
1084 AR5K_RF_PD_GAIN_HI, true);
1086 ath5k_hw_rfb_op(ah, rf_regs,
1087 pdg_curve_to_idx[0],
1088 AR5K_RF_PD_GAIN_LO, true);
1089 ath5k_hw_rfb_op(ah, rf_regs,
1090 pdg_curve_to_idx[0],
1091 AR5K_RF_PD_GAIN_HI, true);
1094 /* Lower synth voltage on Rev 2 */
1095 if (ah->ah_radio == AR5K_RF5112 &&
1096 (ah->ah_radio_5ghz_revision & AR5K_SREV_REV) > 0) {
1097 ath5k_hw_rfb_op(ah, rf_regs, 2,
1098 AR5K_RF_HIGH_VC_CP, true);
1100 ath5k_hw_rfb_op(ah, rf_regs, 2,
1101 AR5K_RF_MID_VC_CP, true);
1103 ath5k_hw_rfb_op(ah, rf_regs, 2,
1104 AR5K_RF_LOW_VC_CP, true);
1106 ath5k_hw_rfb_op(ah, rf_regs, 2,
1107 AR5K_RF_PUSH_UP, true);
1110 /* Decrease power consumption on 5213+ BaseBand */
1111 if (ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) {
1112 ath5k_hw_rfb_op(ah, rf_regs, 1,
1113 AR5K_RF_PAD2GND, true);
1115 ath5k_hw_rfb_op(ah, rf_regs, 1,
1116 AR5K_RF_XB2_LVL, true);
1118 ath5k_hw_rfb_op(ah, rf_regs, 1,
1119 AR5K_RF_XB5_LVL, true);
1121 ath5k_hw_rfb_op(ah, rf_regs, 1,
1122 AR5K_RF_PWD_167, true);
1124 ath5k_hw_rfb_op(ah, rf_regs, 1,
1125 AR5K_RF_PWD_166, true);
1129 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode],
1130 AR5K_RF_GAIN_I, true);
1132 /* Tweak power detector for half/quarter rates */
1133 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ ||
1134 ah->ah_bwmode == AR5K_BWMODE_10MHZ) {
1137 pd_delay = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ?
1140 ath5k_hw_rfb_op(ah, rf_regs, pd_delay,
1141 AR5K_RF_PD_PERIOD_A, true);
1142 ath5k_hw_rfb_op(ah, rf_regs, 0xf,
1143 AR5K_RF_PD_DELAY_A, true);
1148 if (ah->ah_radio == AR5K_RF5413 &&
1149 channel->band == NL80211_BAND_2GHZ) {
1151 ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_DERBY_CHAN_SEL_MODE,
1154 /* Set optimum value for early revisions (on pci-e chips) */
1155 if (ah->ah_mac_srev >= AR5K_SREV_AR5424 &&
1156 ah->ah_mac_srev < AR5K_SREV_AR5413)
1157 ath5k_hw_rfb_op(ah, rf_regs, ath5k_hw_bitswap(6, 3),
1158 AR5K_RF_PWD_ICLOBUF_2G, true);
1162 /* Write RF banks on hw */
1163 for (i = 0; i < ah->ah_rf_banks_size; i++) {
1165 ath5k_hw_reg_write(ah, rfb[i], ini_rfb[i].rfb_ctrl_register);
1172 /**************************\
1173 PHY/RF channel functions
1174 \**************************/
1177 * ath5k_hw_rf5110_chan2athchan() - Convert channel freq on RF5110
1178 * @channel: The &struct ieee80211_channel
1180 * Map channel frequency to IEEE channel number and convert it
1181 * to an internal channel value used by the RF5110 chipset.
1184 ath5k_hw_rf5110_chan2athchan(struct ieee80211_channel *channel)
1188 athchan = (ath5k_hw_bitswap(
1189 (ieee80211_frequency_to_channel(
1190 channel->center_freq) - 24) / 2, 5)
1191 << 1) | (1 << 6) | 0x1;
1196 * ath5k_hw_rf5110_channel() - Set channel frequency on RF5110
1197 * @ah: The &struct ath5k_hw
1198 * @channel: The &struct ieee80211_channel
1201 ath5k_hw_rf5110_channel(struct ath5k_hw *ah,
1202 struct ieee80211_channel *channel)
1207 * Set the channel and wait
1209 data = ath5k_hw_rf5110_chan2athchan(channel);
1210 ath5k_hw_reg_write(ah, data, AR5K_RF_BUFFER);
1211 ath5k_hw_reg_write(ah, 0, AR5K_RF_BUFFER_CONTROL_0);
1212 usleep_range(1000, 1500);
1218 * ath5k_hw_rf5111_chan2athchan() - Handle 2GHz channels on RF5111/2111
1219 * @ieee: IEEE channel number
1220 * @athchan: The &struct ath5k_athchan_2ghz
1222 * In order to enable the RF2111 frequency converter on RF5111/2111 setups
1223 * we need to add some offsets and extra flags to the data values we pass
1224 * on to the PHY. So for every 2GHz channel this function gets called
1225 * to do the conversion.
1228 ath5k_hw_rf5111_chan2athchan(unsigned int ieee,
1229 struct ath5k_athchan_2ghz *athchan)
1233 /* Cast this value to catch negative channel numbers (>= -19) */
1234 channel = (int)ieee;
1237 * Map 2GHz IEEE channel to 5GHz Atheros channel
1239 if (channel <= 13) {
1240 athchan->a2_athchan = 115 + channel;
1241 athchan->a2_flags = 0x46;
1242 } else if (channel == 14) {
1243 athchan->a2_athchan = 124;
1244 athchan->a2_flags = 0x44;
1245 } else if (channel >= 15 && channel <= 26) {
1246 athchan->a2_athchan = ((channel - 14) * 4) + 132;
1247 athchan->a2_flags = 0x46;
1255 * ath5k_hw_rf5111_channel() - Set channel frequency on RF5111/2111
1256 * @ah: The &struct ath5k_hw
1257 * @channel: The &struct ieee80211_channel
1260 ath5k_hw_rf5111_channel(struct ath5k_hw *ah,
1261 struct ieee80211_channel *channel)
1263 struct ath5k_athchan_2ghz ath5k_channel_2ghz;
1264 unsigned int ath5k_channel =
1265 ieee80211_frequency_to_channel(channel->center_freq);
1266 u32 data0, data1, clock;
1270 * Set the channel on the RF5111 radio
1274 if (channel->band == NL80211_BAND_2GHZ) {
1275 /* Map 2GHz channel to 5GHz Atheros channel ID */
1276 ret = ath5k_hw_rf5111_chan2athchan(
1277 ieee80211_frequency_to_channel(channel->center_freq),
1278 &ath5k_channel_2ghz);
1282 ath5k_channel = ath5k_channel_2ghz.a2_athchan;
1283 data0 = ((ath5k_hw_bitswap(ath5k_channel_2ghz.a2_flags, 8) & 0xff)
1287 if (ath5k_channel < 145 || !(ath5k_channel & 1)) {
1289 data1 = ((ath5k_hw_bitswap(ath5k_channel - 24, 8) & 0xff) << 2) |
1290 (clock << 1) | (1 << 10) | 1;
1293 data1 = ((ath5k_hw_bitswap((ath5k_channel - 24) / 2, 8) & 0xff)
1294 << 2) | (clock << 1) | (1 << 10) | 1;
1297 ath5k_hw_reg_write(ah, (data1 & 0xff) | ((data0 & 0xff) << 8),
1299 ath5k_hw_reg_write(ah, ((data1 >> 8) & 0xff) | (data0 & 0xff00),
1300 AR5K_RF_BUFFER_CONTROL_3);
1306 * ath5k_hw_rf5112_channel() - Set channel frequency on 5112 and newer
1307 * @ah: The &struct ath5k_hw
1308 * @channel: The &struct ieee80211_channel
1310 * On RF5112/2112 and newer we don't need to do any conversion.
1311 * We pass the frequency value after a few modifications to the
1314 * NOTE: Make sure channel frequency given is within our range or else
1315 * we might damage the chip ! Use ath5k_channel_ok before calling this one.
1318 ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
1319 struct ieee80211_channel *channel)
1321 u32 data, data0, data1, data2;
1324 data = data0 = data1 = data2 = 0;
1325 c = channel->center_freq;
1327 /* My guess based on code:
1328 * 2GHz RF has 2 synth modes, one with a Local Oscillator
1329 * at 2224Hz and one with a LO at 2192Hz. IF is 1520Hz
1330 * (3040/2). data0 is used to set the PLL divider and data1
1331 * selects synth mode. */
1333 /* Channel 14 and all frequencies with 2Hz spacing
1334 * below/above (non-standard channels) */
1335 if (!((c - 2224) % 5)) {
1336 /* Same as (c - 2224) / 5 */
1337 data0 = ((2 * (c - 704)) - 3040) / 10;
1339 /* Channel 1 and all frequencies with 5Hz spacing
1340 * below/above (standard channels without channel 14) */
1341 } else if (!((c - 2192) % 5)) {
1342 /* Same as (c - 2192) / 5 */
1343 data0 = ((2 * (c - 672)) - 3040) / 10;
1348 data0 = ath5k_hw_bitswap((data0 << 2) & 0xff, 8);
1349 /* This is more complex, we have a single synthesizer with
1350 * 4 reference clock settings (?) based on frequency spacing
1351 * and set using data2. LO is at 4800Hz and data0 is again used
1352 * to set some divider.
1354 * NOTE: There is an old atheros presentation at Stanford
1355 * that mentions a method called dual direct conversion
1356 * with 1GHz sliding IF for RF5110. Maybe that's what we
1357 * have here, or an updated version. */
1358 } else if ((c % 5) != 2 || c > 5435) {
1359 if (!(c % 20) && c >= 5120) {
1360 data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
1361 data2 = ath5k_hw_bitswap(3, 2);
1362 } else if (!(c % 10)) {
1363 data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
1364 data2 = ath5k_hw_bitswap(2, 2);
1365 } else if (!(c % 5)) {
1366 data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
1367 data2 = ath5k_hw_bitswap(1, 2);
1371 data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8);
1372 data2 = ath5k_hw_bitswap(0, 2);
1375 data = (data0 << 4) | (data1 << 1) | (data2 << 2) | 0x1001;
1377 ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
1378 ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
1384 * ath5k_hw_rf2425_channel() - Set channel frequency on RF2425
1385 * @ah: The &struct ath5k_hw
1386 * @channel: The &struct ieee80211_channel
1388 * AR2425/2417 have a different 2GHz RF so code changes
1389 * a little bit from RF5112.
1392 ath5k_hw_rf2425_channel(struct ath5k_hw *ah,
1393 struct ieee80211_channel *channel)
1395 u32 data, data0, data2;
1398 data = data0 = data2 = 0;
1399 c = channel->center_freq;
1402 data0 = ath5k_hw_bitswap((c - 2272), 8);
1405 } else if ((c % 5) != 2 || c > 5435) {
1406 if (!(c % 20) && c < 5120)
1407 data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
1409 data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
1411 data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
1414 data2 = ath5k_hw_bitswap(1, 2);
1416 data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8);
1417 data2 = ath5k_hw_bitswap(0, 2);
1420 data = (data0 << 4) | data2 << 2 | 0x1001;
1422 ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
1423 ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
1429 * ath5k_hw_channel() - Set a channel on the radio chip
1430 * @ah: The &struct ath5k_hw
1431 * @channel: The &struct ieee80211_channel
1433 * This is the main function called to set a channel on the
1434 * radio chip based on the radio chip version.
1437 ath5k_hw_channel(struct ath5k_hw *ah,
1438 struct ieee80211_channel *channel)
1442 * Check bounds supported by the PHY (we don't care about regulatory
1443 * restrictions at this point).
1445 if (!ath5k_channel_ok(ah, channel)) {
1447 "channel frequency (%u MHz) out of supported "
1449 channel->center_freq);
1454 * Set the channel and wait
1456 switch (ah->ah_radio) {
1458 ret = ath5k_hw_rf5110_channel(ah, channel);
1461 ret = ath5k_hw_rf5111_channel(ah, channel);
1465 ret = ath5k_hw_rf2425_channel(ah, channel);
1468 ret = ath5k_hw_rf5112_channel(ah, channel);
1475 /* Set JAPAN setting for channel 14 */
1476 if (channel->center_freq == 2484) {
1477 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
1478 AR5K_PHY_CCKTXCTL_JAPAN);
1480 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
1481 AR5K_PHY_CCKTXCTL_WORLD);
1484 ah->ah_current_channel = channel;
1495 * DOC: PHY Calibration routines
1497 * Noise floor calibration: When we tell the hardware to
1498 * perform a noise floor calibration by setting the
1499 * AR5K_PHY_AGCCTL_NF bit on AR5K_PHY_AGCCTL, it will periodically
1500 * sample-and-hold the minimum noise level seen at the antennas.
1501 * This value is then stored in a ring buffer of recently measured
1502 * noise floor values so we have a moving window of the last few
1503 * samples. The median of the values in the history is then loaded
1504 * into the hardware for its own use for RSSI and CCA measurements.
1505 * This type of calibration doesn't interfere with traffic.
1507 * AGC calibration: When we tell the hardware to perform
1508 * an AGC (Automatic Gain Control) calibration by setting the
1509 * AR5K_PHY_AGCCTL_CAL, hw disconnects the antennas and does
1510 * a calibration on the DC offsets of ADCs. During this period
1511 * rx/tx gets disabled so we have to deal with it on the driver
1514 * I/Q calibration: When we tell the hardware to perform
1515 * an I/Q calibration, it tries to correct I/Q imbalance and
1516 * fix QAM constellation by sampling data from rxed frames.
1517 * It doesn't interfere with traffic.
1519 * For more infos on AGC and I/Q calibration check out patent doc
1524 * ath5k_hw_read_measured_noise_floor() - Read measured NF from hw
1525 * @ah: The &struct ath5k_hw
1528 ath5k_hw_read_measured_noise_floor(struct ath5k_hw *ah)
1532 val = ath5k_hw_reg_read(ah, AR5K_PHY_NF);
1533 return sign_extend32(AR5K_REG_MS(val, AR5K_PHY_NF_MINCCA_PWR), 8);
1537 * ath5k_hw_init_nfcal_hist() - Initialize NF calibration history buffer
1538 * @ah: The &struct ath5k_hw
1541 ath5k_hw_init_nfcal_hist(struct ath5k_hw *ah)
1545 ah->ah_nfcal_hist.index = 0;
1546 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++)
1547 ah->ah_nfcal_hist.nfval[i] = AR5K_TUNE_CCA_MAX_GOOD_VALUE;
1551 * ath5k_hw_update_nfcal_hist() - Update NF calibration history buffer
1552 * @ah: The &struct ath5k_hw
1553 * @noise_floor: The NF we got from hw
1555 static void ath5k_hw_update_nfcal_hist(struct ath5k_hw *ah, s16 noise_floor)
1557 struct ath5k_nfcal_hist *hist = &ah->ah_nfcal_hist;
1558 hist->index = (hist->index + 1) & (ATH5K_NF_CAL_HIST_MAX - 1);
1559 hist->nfval[hist->index] = noise_floor;
1563 * ath5k_hw_get_median_noise_floor() - Get median NF from history buffer
1564 * @ah: The &struct ath5k_hw
1567 ath5k_hw_get_median_noise_floor(struct ath5k_hw *ah)
1569 s16 sort[ATH5K_NF_CAL_HIST_MAX];
1573 memcpy(sort, ah->ah_nfcal_hist.nfval, sizeof(sort));
1574 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX - 1; i++) {
1575 for (j = 1; j < ATH5K_NF_CAL_HIST_MAX - i; j++) {
1576 if (sort[j] > sort[j - 1]) {
1578 sort[j] = sort[j - 1];
1583 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++) {
1584 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1585 "cal %d:%d\n", i, sort[i]);
1587 return sort[(ATH5K_NF_CAL_HIST_MAX - 1) / 2];
1591 * ath5k_hw_update_noise_floor() - Update NF on hardware
1592 * @ah: The &struct ath5k_hw
1594 * This is the main function we call to perform a NF calibration,
1595 * it reads NF from hardware, calculates the median and updates
1599 ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
1601 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1606 /* keep last value if calibration hasn't completed */
1607 if (ath5k_hw_reg_read(ah, AR5K_PHY_AGCCTL) & AR5K_PHY_AGCCTL_NF) {
1608 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1609 "NF did not complete in calibration window\n");
1614 ah->ah_cal_mask |= AR5K_CALIBRATION_NF;
1616 ee_mode = ath5k_eeprom_mode_from_channel(ah, ah->ah_current_channel);
1618 /* completed NF calibration, test threshold */
1619 nf = ath5k_hw_read_measured_noise_floor(ah);
1620 threshold = ee->ee_noise_floor_thr[ee_mode];
1622 if (nf > threshold) {
1623 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1624 "noise floor failure detected; "
1625 "read %d, threshold %d\n",
1628 nf = AR5K_TUNE_CCA_MAX_GOOD_VALUE;
1631 ath5k_hw_update_nfcal_hist(ah, nf);
1632 nf = ath5k_hw_get_median_noise_floor(ah);
1634 /* load noise floor (in .5 dBm) so the hardware will use it */
1635 val = ath5k_hw_reg_read(ah, AR5K_PHY_NF) & ~AR5K_PHY_NF_M;
1636 val |= (nf * 2) & AR5K_PHY_NF_M;
1637 ath5k_hw_reg_write(ah, val, AR5K_PHY_NF);
1639 AR5K_REG_MASKED_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF,
1640 ~(AR5K_PHY_AGCCTL_NF_EN | AR5K_PHY_AGCCTL_NF_NOUPDATE));
1642 ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF,
1646 * Load a high max CCA Power value (-50 dBm in .5 dBm units)
1647 * so that we're not capped by the median we just loaded.
1648 * This will be used as the initial value for the next noise
1649 * floor calibration.
1651 val = (val & ~AR5K_PHY_NF_M) | ((-50 * 2) & AR5K_PHY_NF_M);
1652 ath5k_hw_reg_write(ah, val, AR5K_PHY_NF);
1653 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
1654 AR5K_PHY_AGCCTL_NF_EN |
1655 AR5K_PHY_AGCCTL_NF_NOUPDATE |
1656 AR5K_PHY_AGCCTL_NF);
1658 ah->ah_noise_floor = nf;
1660 ah->ah_cal_mask &= ~AR5K_CALIBRATION_NF;
1662 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1663 "noise floor calibrated: %d\n", nf);
1667 * ath5k_hw_rf5110_calibrate() - Perform a PHY calibration on RF5110
1668 * @ah: The &struct ath5k_hw
1669 * @channel: The &struct ieee80211_channel
1671 * Do a complete PHY calibration (AGC + NF + I/Q) on RF5110
1674 ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah,
1675 struct ieee80211_channel *channel)
1677 u32 phy_sig, phy_agc, phy_sat, beacon;
1680 if (!(ah->ah_cal_mask & AR5K_CALIBRATION_FULL))
1684 * Disable beacons and RX/TX queues, wait
1686 AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW_5210,
1687 AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210);
1688 beacon = ath5k_hw_reg_read(ah, AR5K_BEACON_5210);
1689 ath5k_hw_reg_write(ah, beacon & ~AR5K_BEACON_ENABLE, AR5K_BEACON_5210);
1691 usleep_range(2000, 2500);
1694 * Set the channel (with AGC turned off)
1696 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1698 ret = ath5k_hw_channel(ah, channel);
1701 * Activate PHY and wait
1703 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
1704 usleep_range(1000, 1500);
1706 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1712 * Calibrate the radio chip
1715 /* Remember normal state */
1716 phy_sig = ath5k_hw_reg_read(ah, AR5K_PHY_SIG);
1717 phy_agc = ath5k_hw_reg_read(ah, AR5K_PHY_AGCCOARSE);
1718 phy_sat = ath5k_hw_reg_read(ah, AR5K_PHY_ADCSAT);
1720 /* Update radio registers */
1721 ath5k_hw_reg_write(ah, (phy_sig & ~(AR5K_PHY_SIG_FIRPWR)) |
1722 AR5K_REG_SM(-1, AR5K_PHY_SIG_FIRPWR), AR5K_PHY_SIG);
1724 ath5k_hw_reg_write(ah, (phy_agc & ~(AR5K_PHY_AGCCOARSE_HI |
1725 AR5K_PHY_AGCCOARSE_LO)) |
1726 AR5K_REG_SM(-1, AR5K_PHY_AGCCOARSE_HI) |
1727 AR5K_REG_SM(-127, AR5K_PHY_AGCCOARSE_LO), AR5K_PHY_AGCCOARSE);
1729 ath5k_hw_reg_write(ah, (phy_sat & ~(AR5K_PHY_ADCSAT_ICNT |
1730 AR5K_PHY_ADCSAT_THR)) |
1731 AR5K_REG_SM(2, AR5K_PHY_ADCSAT_ICNT) |
1732 AR5K_REG_SM(12, AR5K_PHY_ADCSAT_THR), AR5K_PHY_ADCSAT);
1736 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1738 ath5k_hw_reg_write(ah, AR5K_PHY_RFSTG_DISABLE, AR5K_PHY_RFSTG);
1739 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1741 usleep_range(1000, 1500);
1744 * Enable calibration and wait until completion
1746 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_CAL);
1748 ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
1749 AR5K_PHY_AGCCTL_CAL, 0, false);
1751 /* Reset to normal state */
1752 ath5k_hw_reg_write(ah, phy_sig, AR5K_PHY_SIG);
1753 ath5k_hw_reg_write(ah, phy_agc, AR5K_PHY_AGCCOARSE);
1754 ath5k_hw_reg_write(ah, phy_sat, AR5K_PHY_ADCSAT);
1757 ATH5K_ERR(ah, "calibration timeout (%uMHz)\n",
1758 channel->center_freq);
1763 * Re-enable RX/TX and beacons
1765 AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW_5210,
1766 AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210);
1767 ath5k_hw_reg_write(ah, beacon, AR5K_BEACON_5210);
1773 * ath5k_hw_rf511x_iq_calibrate() - Perform I/Q calibration on RF5111 and newer
1774 * @ah: The &struct ath5k_hw
1777 ath5k_hw_rf511x_iq_calibrate(struct ath5k_hw *ah)
1780 s32 iq_corr, i_coff, i_coffd, q_coff, q_coffd;
1783 /* Skip if I/Q calibration is not needed or if it's still running */
1784 if (!ah->ah_iq_cal_needed)
1786 else if (ath5k_hw_reg_read(ah, AR5K_PHY_IQ) & AR5K_PHY_IQ_RUN) {
1787 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1788 "I/Q calibration still running");
1792 /* Calibration has finished, get the results and re-run */
1794 /* Work around for empty results which can apparently happen on 5212:
1795 * Read registers up to 10 times until we get both i_pr and q_pwr */
1796 for (i = 0; i <= 10; i++) {
1797 iq_corr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_CORR);
1798 i_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_I);
1799 q_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_Q);
1800 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1801 "iq_corr:%x i_pwr:%x q_pwr:%x", iq_corr, i_pwr, q_pwr);
1806 i_coffd = ((i_pwr >> 1) + (q_pwr >> 1)) >> 7;
1808 if (ah->ah_version == AR5K_AR5211)
1809 q_coffd = q_pwr >> 6;
1811 q_coffd = q_pwr >> 7;
1813 /* In case i_coffd became zero, cancel calibration
1814 * not only it's too small, it'll also result a divide
1815 * by zero later on. */
1816 if (i_coffd == 0 || q_coffd < 2)
1819 /* Protect against loss of sign bits */
1821 i_coff = (-iq_corr) / i_coffd;
1822 i_coff = clamp(i_coff, -32, 31); /* signed 6 bit */
1824 if (ah->ah_version == AR5K_AR5211)
1825 q_coff = (i_pwr / q_coffd) - 64;
1827 q_coff = (i_pwr / q_coffd) - 128;
1828 q_coff = clamp(q_coff, -16, 15); /* signed 5 bit */
1830 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1831 "new I:%d Q:%d (i_coffd:%x q_coffd:%x)",
1832 i_coff, q_coff, i_coffd, q_coffd);
1834 /* Commit new I/Q values (set enable bit last to match HAL sources) */
1835 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF, i_coff);
1836 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF, q_coff);
1837 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE);
1839 /* Re-enable calibration -if we don't we'll commit
1840 * the same values again and again */
1841 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
1842 AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
1843 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_RUN);
1849 * ath5k_hw_phy_calibrate() - Perform a PHY calibration
1850 * @ah: The &struct ath5k_hw
1851 * @channel: The &struct ieee80211_channel
1853 * The main function we call from above to perform
1854 * a short or full PHY calibration based on RF chip
1855 * and current channel
1858 ath5k_hw_phy_calibrate(struct ath5k_hw *ah,
1859 struct ieee80211_channel *channel)
1863 if (ah->ah_radio == AR5K_RF5110)
1864 return ath5k_hw_rf5110_calibrate(ah, channel);
1866 ret = ath5k_hw_rf511x_iq_calibrate(ah);
1868 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1869 "No I/Q correction performed (%uMHz)\n",
1870 channel->center_freq);
1872 /* Happens all the time if there is not much
1873 * traffic, consider it normal behaviour. */
1877 /* On full calibration request a PAPD probe for
1878 * gainf calibration if needed */
1879 if ((ah->ah_cal_mask & AR5K_CALIBRATION_FULL) &&
1880 (ah->ah_radio == AR5K_RF5111 ||
1881 ah->ah_radio == AR5K_RF5112) &&
1882 channel->hw_value != AR5K_MODE_11B)
1883 ath5k_hw_request_rfgain_probe(ah);
1885 /* Update noise floor */
1886 if (!(ah->ah_cal_mask & AR5K_CALIBRATION_NF))
1887 ath5k_hw_update_noise_floor(ah);
1893 /***************************\
1894 * Spur mitigation functions *
1895 \***************************/
1898 * ath5k_hw_set_spur_mitigation_filter() - Configure SPUR filter
1899 * @ah: The &struct ath5k_hw
1900 * @channel: The &struct ieee80211_channel
1902 * This function gets called during PHY initialization to
1903 * configure the spur filter for the given channel. Spur is noise
1904 * generated due to "reflection" effects, for more information on this
1905 * method check out patent US7643810
1908 ath5k_hw_set_spur_mitigation_filter(struct ath5k_hw *ah,
1909 struct ieee80211_channel *channel)
1911 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1912 u32 mag_mask[4] = {0, 0, 0, 0};
1913 u32 pilot_mask[2] = {0, 0};
1914 /* Note: fbin values are scaled up by 2 */
1915 u16 spur_chan_fbin, chan_fbin, symbol_width, spur_detection_window;
1916 s32 spur_delta_phase, spur_freq_sigma_delta;
1917 s32 spur_offset, num_symbols_x16;
1918 u8 num_symbol_offsets, i, freq_band;
1920 /* Convert current frequency to fbin value (the same way channels
1921 * are stored on EEPROM, check out ath5k_eeprom_bin2freq) and scale
1922 * up by 2 so we can compare it later */
1923 if (channel->band == NL80211_BAND_2GHZ) {
1924 chan_fbin = (channel->center_freq - 2300) * 10;
1925 freq_band = AR5K_EEPROM_BAND_2GHZ;
1927 chan_fbin = (channel->center_freq - 4900) * 10;
1928 freq_band = AR5K_EEPROM_BAND_5GHZ;
1931 /* Check if any spur_chan_fbin from EEPROM is
1932 * within our current channel's spur detection range */
1933 spur_chan_fbin = AR5K_EEPROM_NO_SPUR;
1934 spur_detection_window = AR5K_SPUR_CHAN_WIDTH;
1935 /* XXX: Half/Quarter channels ?*/
1936 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
1937 spur_detection_window *= 2;
1939 for (i = 0; i < AR5K_EEPROM_N_SPUR_CHANS; i++) {
1940 spur_chan_fbin = ee->ee_spur_chans[i][freq_band];
1942 /* Note: mask cleans AR5K_EEPROM_NO_SPUR flag
1943 * so it's zero if we got nothing from EEPROM */
1944 if (spur_chan_fbin == AR5K_EEPROM_NO_SPUR) {
1945 spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK;
1949 if ((chan_fbin - spur_detection_window <=
1950 (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK)) &&
1951 (chan_fbin + spur_detection_window >=
1952 (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK))) {
1953 spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK;
1958 /* We need to enable spur filter for this channel */
1959 if (spur_chan_fbin) {
1960 spur_offset = spur_chan_fbin - chan_fbin;
1963 * spur_freq_sigma_delta -> spur_offset / sample_freq << 21
1964 * spur_delta_phase -> spur_offset / chip_freq << 11
1965 * Note: Both values have 100Hz resolution
1967 switch (ah->ah_bwmode) {
1968 case AR5K_BWMODE_40MHZ:
1969 /* Both sample_freq and chip_freq are 80MHz */
1970 spur_delta_phase = (spur_offset << 16) / 25;
1971 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1972 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz * 2;
1974 case AR5K_BWMODE_10MHZ:
1975 /* Both sample_freq and chip_freq are 20MHz (?) */
1976 spur_delta_phase = (spur_offset << 18) / 25;
1977 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1978 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 2;
1980 case AR5K_BWMODE_5MHZ:
1981 /* Both sample_freq and chip_freq are 10MHz (?) */
1982 spur_delta_phase = (spur_offset << 19) / 25;
1983 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1984 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 4;
1987 if (channel->band == NL80211_BAND_5GHZ) {
1988 /* Both sample_freq and chip_freq are 40MHz */
1989 spur_delta_phase = (spur_offset << 17) / 25;
1990 spur_freq_sigma_delta =
1991 (spur_delta_phase >> 10);
1993 AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz;
1995 /* sample_freq -> 40MHz chip_freq -> 44MHz
1996 * (for b compatibility) */
1997 spur_delta_phase = (spur_offset << 17) / 25;
1998 spur_freq_sigma_delta =
1999 (spur_offset << 8) / 55;
2001 AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz;
2006 /* Calculate pilot and magnitude masks */
2008 /* Scale up spur_offset by 1000 to switch to 100HZ resolution
2009 * and divide by symbol_width to find how many symbols we have
2010 * Note: number of symbols is scaled up by 16 */
2011 num_symbols_x16 = ((spur_offset * 1000) << 4) / symbol_width;
2013 /* Spur is on a symbol if num_symbols_x16 % 16 is zero */
2014 if (!(num_symbols_x16 & 0xF))
2016 num_symbol_offsets = 3;
2019 num_symbol_offsets = 4;
2021 for (i = 0; i < num_symbol_offsets; i++) {
2023 /* Calculate pilot mask */
2025 (num_symbols_x16 / 16) + i + 25;
2027 /* Pilot magnitude mask seems to be a way to
2028 * declare the boundaries for our detection
2029 * window or something, it's 2 for the middle
2030 * value(s) where the symbol is expected to be
2031 * and 1 on the boundary values */
2033 (i == 0 || i == (num_symbol_offsets - 1))
2036 if (curr_sym_off >= 0 && curr_sym_off <= 32) {
2037 if (curr_sym_off <= 25)
2038 pilot_mask[0] |= 1 << curr_sym_off;
2039 else if (curr_sym_off >= 27)
2040 pilot_mask[0] |= 1 << (curr_sym_off - 1);
2041 } else if (curr_sym_off >= 33 && curr_sym_off <= 52)
2042 pilot_mask[1] |= 1 << (curr_sym_off - 33);
2044 /* Calculate magnitude mask (for viterbi decoder) */
2045 if (curr_sym_off >= -1 && curr_sym_off <= 14)
2047 plt_mag_map << (curr_sym_off + 1) * 2;
2048 else if (curr_sym_off >= 15 && curr_sym_off <= 30)
2050 plt_mag_map << (curr_sym_off - 15) * 2;
2051 else if (curr_sym_off >= 31 && curr_sym_off <= 46)
2053 plt_mag_map << (curr_sym_off - 31) * 2;
2054 else if (curr_sym_off >= 47 && curr_sym_off <= 53)
2056 plt_mag_map << (curr_sym_off - 47) * 2;
2060 /* Write settings on hw to enable spur filter */
2061 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
2062 AR5K_PHY_BIN_MASK_CTL_RATE, 0xff);
2063 /* XXX: Self correlator also ? */
2064 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
2065 AR5K_PHY_IQ_PILOT_MASK_EN |
2066 AR5K_PHY_IQ_CHAN_MASK_EN |
2067 AR5K_PHY_IQ_SPUR_FILT_EN);
2069 /* Set delta phase and freq sigma delta */
2070 ath5k_hw_reg_write(ah,
2071 AR5K_REG_SM(spur_delta_phase,
2072 AR5K_PHY_TIMING_11_SPUR_DELTA_PHASE) |
2073 AR5K_REG_SM(spur_freq_sigma_delta,
2074 AR5K_PHY_TIMING_11_SPUR_FREQ_SD) |
2075 AR5K_PHY_TIMING_11_USE_SPUR_IN_AGC,
2076 AR5K_PHY_TIMING_11);
2078 /* Write pilot masks */
2079 ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_7);
2080 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8,
2081 AR5K_PHY_TIMING_8_PILOT_MASK_2,
2084 ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_9);
2085 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10,
2086 AR5K_PHY_TIMING_10_PILOT_MASK_2,
2089 /* Write magnitude masks */
2090 ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK_1);
2091 ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK_2);
2092 ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK_3);
2093 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
2094 AR5K_PHY_BIN_MASK_CTL_MASK_4,
2097 ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK2_1);
2098 ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK2_2);
2099 ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK2_3);
2100 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4,
2101 AR5K_PHY_BIN_MASK2_4_MASK_4,
2104 } else if (ath5k_hw_reg_read(ah, AR5K_PHY_IQ) &
2105 AR5K_PHY_IQ_SPUR_FILT_EN) {
2106 /* Clean up spur mitigation settings and disable filter */
2107 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
2108 AR5K_PHY_BIN_MASK_CTL_RATE, 0);
2109 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_IQ,
2110 AR5K_PHY_IQ_PILOT_MASK_EN |
2111 AR5K_PHY_IQ_CHAN_MASK_EN |
2112 AR5K_PHY_IQ_SPUR_FILT_EN);
2113 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_11);
2115 /* Clear pilot masks */
2116 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_7);
2117 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8,
2118 AR5K_PHY_TIMING_8_PILOT_MASK_2,
2121 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_9);
2122 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10,
2123 AR5K_PHY_TIMING_10_PILOT_MASK_2,
2126 /* Clear magnitude masks */
2127 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_1);
2128 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_2);
2129 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_3);
2130 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
2131 AR5K_PHY_BIN_MASK_CTL_MASK_4,
2134 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_1);
2135 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_2);
2136 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_3);
2137 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4,
2138 AR5K_PHY_BIN_MASK2_4_MASK_4,
2149 * DOC: Antenna control
2151 * Hw supports up to 14 antennas ! I haven't found any card that implements
2152 * that. The maximum number of antennas I've seen is up to 4 (2 for 2GHz and 2
2153 * for 5GHz). Antenna 1 (MAIN) should be omnidirectional, 2 (AUX)
2154 * omnidirectional or sectorial and antennas 3-14 sectorial (or directional).
2156 * We can have a single antenna for RX and multiple antennas for TX.
2157 * RX antenna is our "default" antenna (usually antenna 1) set on
2158 * DEFAULT_ANTENNA register and TX antenna is set on each TX control descriptor
2159 * (0 for automatic selection, 1 - 14 antenna number).
2161 * We can let hw do all the work doing fast antenna diversity for both
2162 * tx and rx or we can do things manually. Here are the options we have
2163 * (all are bits of STA_ID1 register):
2165 * AR5K_STA_ID1_DEFAULT_ANTENNA -> When 0 is set as the TX antenna on TX
2166 * control descriptor, use the default antenna to transmit or else use the last
2167 * antenna on which we received an ACK.
2169 * AR5K_STA_ID1_DESC_ANTENNA -> Update default antenna after each TX frame to
2170 * the antenna on which we got the ACK for that frame.
2172 * AR5K_STA_ID1_RTS_DEF_ANTENNA -> Use default antenna for RTS or else use the
2173 * one on the TX descriptor.
2175 * AR5K_STA_ID1_SELFGEN_DEF_ANT -> Use default antenna for self generated frames
2176 * (ACKs etc), or else use current antenna (the one we just used for TX).
2178 * Using the above we support the following scenarios:
2180 * AR5K_ANTMODE_DEFAULT -> Hw handles antenna diversity etc automatically
2182 * AR5K_ANTMODE_FIXED_A -> Only antenna A (MAIN) is present
2184 * AR5K_ANTMODE_FIXED_B -> Only antenna B (AUX) is present
2186 * AR5K_ANTMODE_SINGLE_AP -> Sta locked on a single ap
2188 * AR5K_ANTMODE_SECTOR_AP -> AP with tx antenna set on tx desc
2190 * AR5K_ANTMODE_SECTOR_STA -> STA with tx antenna set on tx desc
2192 * AR5K_ANTMODE_DEBUG Debug mode -A -> Rx, B-> Tx-
2194 * Also note that when setting antenna to F on tx descriptor card inverts
2195 * current tx antenna.
2199 * ath5k_hw_set_def_antenna() - Set default rx antenna on AR5211/5212 and newer
2200 * @ah: The &struct ath5k_hw
2201 * @ant: Antenna number
2204 ath5k_hw_set_def_antenna(struct ath5k_hw *ah, u8 ant)
2206 if (ah->ah_version != AR5K_AR5210)
2207 ath5k_hw_reg_write(ah, ant & 0x7, AR5K_DEFAULT_ANTENNA);
2211 * ath5k_hw_set_fast_div() - Enable/disable fast rx antenna diversity
2212 * @ah: The &struct ath5k_hw
2213 * @ee_mode: One of enum ath5k_driver_mode
2214 * @enable: True to enable, false to disable
2217 ath5k_hw_set_fast_div(struct ath5k_hw *ah, u8 ee_mode, bool enable)
2220 case AR5K_EEPROM_MODE_11G:
2221 /* XXX: This is set to
2222 * disabled on initvals !!! */
2223 case AR5K_EEPROM_MODE_11A:
2225 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGCCTL,
2226 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
2228 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
2229 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
2231 case AR5K_EEPROM_MODE_11B:
2232 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
2233 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
2240 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
2241 AR5K_PHY_RESTART_DIV_GC, 4);
2243 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
2244 AR5K_PHY_FAST_ANT_DIV_EN);
2246 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
2247 AR5K_PHY_RESTART_DIV_GC, 0);
2249 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
2250 AR5K_PHY_FAST_ANT_DIV_EN);
2255 * ath5k_hw_set_antenna_switch() - Set up antenna switch table
2256 * @ah: The &struct ath5k_hw
2257 * @ee_mode: One of enum ath5k_driver_mode
2259 * Switch table comes from EEPROM and includes information on controlling
2260 * the 2 antenna RX attenuators
2263 ath5k_hw_set_antenna_switch(struct ath5k_hw *ah, u8 ee_mode)
2268 * In case a fixed antenna was set as default
2269 * use the same switch table twice.
2271 if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_A)
2272 ant0 = ant1 = AR5K_ANT_SWTABLE_A;
2273 else if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_B)
2274 ant0 = ant1 = AR5K_ANT_SWTABLE_B;
2276 ant0 = AR5K_ANT_SWTABLE_A;
2277 ant1 = AR5K_ANT_SWTABLE_B;
2280 /* Set antenna idle switch table */
2281 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_ANT_CTL,
2282 AR5K_PHY_ANT_CTL_SWTABLE_IDLE,
2283 (ah->ah_ant_ctl[ee_mode][AR5K_ANT_CTL] |
2284 AR5K_PHY_ANT_CTL_TXRX_EN));
2286 /* Set antenna switch tables */
2287 ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant0],
2288 AR5K_PHY_ANT_SWITCH_TABLE_0);
2289 ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant1],
2290 AR5K_PHY_ANT_SWITCH_TABLE_1);
2294 * ath5k_hw_set_antenna_mode() - Set antenna operating mode
2295 * @ah: The &struct ath5k_hw
2296 * @ant_mode: One of enum ath5k_ant_mode
2299 ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode)
2301 struct ieee80211_channel *channel = ah->ah_current_channel;
2302 bool use_def_for_tx, update_def_on_tx, use_def_for_rts, fast_div;
2303 bool use_def_for_sg;
2308 /* if channel is not initialized yet we can't set the antennas
2309 * so just store the mode. it will be set on the next reset */
2310 if (channel == NULL) {
2311 ah->ah_ant_mode = ant_mode;
2315 def_ant = ah->ah_def_ant;
2317 ee_mode = ath5k_eeprom_mode_from_channel(ah, channel);
2320 case AR5K_ANTMODE_DEFAULT:
2322 use_def_for_tx = false;
2323 update_def_on_tx = false;
2324 use_def_for_rts = false;
2325 use_def_for_sg = false;
2328 case AR5K_ANTMODE_FIXED_A:
2331 use_def_for_tx = true;
2332 update_def_on_tx = false;
2333 use_def_for_rts = true;
2334 use_def_for_sg = true;
2337 case AR5K_ANTMODE_FIXED_B:
2340 use_def_for_tx = true;
2341 update_def_on_tx = false;
2342 use_def_for_rts = true;
2343 use_def_for_sg = true;
2346 case AR5K_ANTMODE_SINGLE_AP:
2347 def_ant = 1; /* updated on tx */
2349 use_def_for_tx = true;
2350 update_def_on_tx = true;
2351 use_def_for_rts = true;
2352 use_def_for_sg = true;
2355 case AR5K_ANTMODE_SECTOR_AP:
2356 tx_ant = 1; /* variable */
2357 use_def_for_tx = false;
2358 update_def_on_tx = false;
2359 use_def_for_rts = true;
2360 use_def_for_sg = false;
2363 case AR5K_ANTMODE_SECTOR_STA:
2364 tx_ant = 1; /* variable */
2365 use_def_for_tx = true;
2366 update_def_on_tx = false;
2367 use_def_for_rts = true;
2368 use_def_for_sg = false;
2371 case AR5K_ANTMODE_DEBUG:
2374 use_def_for_tx = false;
2375 update_def_on_tx = false;
2376 use_def_for_rts = false;
2377 use_def_for_sg = false;
2384 ah->ah_tx_ant = tx_ant;
2385 ah->ah_ant_mode = ant_mode;
2386 ah->ah_def_ant = def_ant;
2388 sta_id1 |= use_def_for_tx ? AR5K_STA_ID1_DEFAULT_ANTENNA : 0;
2389 sta_id1 |= update_def_on_tx ? AR5K_STA_ID1_DESC_ANTENNA : 0;
2390 sta_id1 |= use_def_for_rts ? AR5K_STA_ID1_RTS_DEF_ANTENNA : 0;
2391 sta_id1 |= use_def_for_sg ? AR5K_STA_ID1_SELFGEN_DEF_ANT : 0;
2393 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_ANTENNA_SETTINGS);
2396 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1, sta_id1);
2398 ath5k_hw_set_antenna_switch(ah, ee_mode);
2399 /* Note: set diversity before default antenna
2400 * because it won't work correctly */
2401 ath5k_hw_set_fast_div(ah, ee_mode, fast_div);
2402 ath5k_hw_set_def_antenna(ah, def_ant);
2415 * ath5k_get_interpolated_value() - Get interpolated Y val between two points
2416 * @target: X value of the middle point
2417 * @x_left: X value of the left point
2418 * @x_right: X value of the right point
2419 * @y_left: Y value of the left point
2420 * @y_right: Y value of the right point
2423 ath5k_get_interpolated_value(s16 target, s16 x_left, s16 x_right,
2424 s16 y_left, s16 y_right)
2428 /* Avoid divide by zero and skip interpolation
2429 * if we have the same point */
2430 if ((x_left == x_right) || (y_left == y_right))
2434 * Since we use ints and not fps, we need to scale up in
2435 * order to get a sane ratio value (or else we 'll eg. get
2436 * always 1 instead of 1.25, 1.75 etc). We scale up by 100
2437 * to have some accuracy both for 0.5 and 0.25 steps.
2439 ratio = ((100 * y_right - 100 * y_left) / (x_right - x_left));
2441 /* Now scale down to be in range */
2442 result = y_left + (ratio * (target - x_left) / 100);
2448 * ath5k_get_linear_pcdac_min() - Find vertical boundary (min pwr) for the
2449 * linear PCDAC curve
2450 * @stepL: Left array with y values (pcdac steps)
2451 * @stepR: Right array with y values (pcdac steps)
2452 * @pwrL: Left array with x values (power steps)
2453 * @pwrR: Right array with x values (power steps)
2455 * Since we have the top of the curve and we draw the line below
2456 * until we reach 1 (1 pcdac step) we need to know which point
2457 * (x value) that is so that we don't go below x axis and have negative
2458 * pcdac values when creating the curve, or fill the table with zeros.
2461 ath5k_get_linear_pcdac_min(const u8 *stepL, const u8 *stepR,
2462 const s16 *pwrL, const s16 *pwrR)
2465 s16 min_pwrL, min_pwrR;
2468 /* Some vendors write the same pcdac value twice !!! */
2469 if (stepL[0] == stepL[1] || stepR[0] == stepR[1])
2470 return max(pwrL[0], pwrR[0]);
2472 if (pwrL[0] == pwrL[1])
2478 tmp = (s8) ath5k_get_interpolated_value(pwr_i,
2480 stepL[0], stepL[1]);
2486 if (pwrR[0] == pwrR[1])
2492 tmp = (s8) ath5k_get_interpolated_value(pwr_i,
2494 stepR[0], stepR[1]);
2500 /* Keep the right boundary so that it works for both curves */
2501 return max(min_pwrL, min_pwrR);
2505 * ath5k_create_power_curve() - Create a Power to PDADC or PCDAC curve
2506 * @pmin: Minimum power value (xmin)
2507 * @pmax: Maximum power value (xmax)
2508 * @pwr: Array of power steps (x values)
2509 * @vpd: Array of matching PCDAC/PDADC steps (y values)
2510 * @num_points: Number of provided points
2511 * @vpd_table: Array to fill with the full PCDAC/PDADC values (y values)
2512 * @type: One of enum ath5k_powertable_type (eeprom.h)
2514 * Interpolate (pwr,vpd) points to create a Power to PDADC or a
2515 * Power to PCDAC curve.
2517 * Each curve has power on x axis (in 0.5dB units) and PCDAC/PDADC
2518 * steps (offsets) on y axis. Power can go up to 31.5dB and max
2519 * PCDAC/PDADC step for each curve is 64 but we can write more than
2520 * one curves on hw so we can go up to 128 (which is the max step we
2521 * can write on the final table).
2523 * We write y values (PCDAC/PDADC steps) on hw.
2526 ath5k_create_power_curve(s16 pmin, s16 pmax,
2527 const s16 *pwr, const u8 *vpd,
2529 u8 *vpd_table, u8 type)
2531 u8 idx[2] = { 0, 1 };
2532 s16 pwr_i = 2 * pmin;
2538 /* We want the whole line, so adjust boundaries
2539 * to cover the entire power range. Note that
2540 * power values are already 0.25dB so no need
2541 * to multiply pwr_i by 2 */
2542 if (type == AR5K_PWRTABLE_LINEAR_PCDAC) {
2548 /* Find surrounding turning points (TPs)
2549 * and interpolate between them */
2550 for (i = 0; (i <= (u16) (pmax - pmin)) &&
2551 (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) {
2553 /* We passed the right TP, move to the next set of TPs
2554 * if we pass the last TP, extrapolate above using the last
2555 * two TPs for ratio */
2556 if ((pwr_i > pwr[idx[1]]) && (idx[1] < num_points - 1)) {
2561 vpd_table[i] = (u8) ath5k_get_interpolated_value(pwr_i,
2562 pwr[idx[0]], pwr[idx[1]],
2563 vpd[idx[0]], vpd[idx[1]]);
2565 /* Increase by 0.5dB
2566 * (0.25 dB units) */
2572 * ath5k_get_chan_pcal_surrounding_piers() - Get surrounding calibration piers
2573 * for a given channel.
2574 * @ah: The &struct ath5k_hw
2575 * @channel: The &struct ieee80211_channel
2576 * @pcinfo_l: The &struct ath5k_chan_pcal_info to put the left cal. pier
2577 * @pcinfo_r: The &struct ath5k_chan_pcal_info to put the right cal. pier
2579 * Get the surrounding per-channel power calibration piers
2580 * for a given frequency so that we can interpolate between
2581 * them and come up with an appropriate dataset for our current
2585 ath5k_get_chan_pcal_surrounding_piers(struct ath5k_hw *ah,
2586 struct ieee80211_channel *channel,
2587 struct ath5k_chan_pcal_info **pcinfo_l,
2588 struct ath5k_chan_pcal_info **pcinfo_r)
2590 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2591 struct ath5k_chan_pcal_info *pcinfo;
2594 u32 target = channel->center_freq;
2599 switch (channel->hw_value) {
2600 case AR5K_EEPROM_MODE_11A:
2601 pcinfo = ee->ee_pwr_cal_a;
2602 mode = AR5K_EEPROM_MODE_11A;
2604 case AR5K_EEPROM_MODE_11B:
2605 pcinfo = ee->ee_pwr_cal_b;
2606 mode = AR5K_EEPROM_MODE_11B;
2608 case AR5K_EEPROM_MODE_11G:
2610 pcinfo = ee->ee_pwr_cal_g;
2611 mode = AR5K_EEPROM_MODE_11G;
2614 max = ee->ee_n_piers[mode] - 1;
2616 /* Frequency is below our calibrated
2617 * range. Use the lowest power curve
2619 if (target < pcinfo[0].freq) {
2624 /* Frequency is above our calibrated
2625 * range. Use the highest power curve
2627 if (target > pcinfo[max].freq) {
2628 idx_l = idx_r = max;
2632 /* Frequency is inside our calibrated
2633 * channel range. Pick the surrounding
2634 * calibration piers so that we can
2636 for (i = 0; i <= max; i++) {
2638 /* Frequency matches one of our calibration
2639 * piers, no need to interpolate, just use
2640 * that calibration pier */
2641 if (pcinfo[i].freq == target) {
2646 /* We found a calibration pier that's above
2647 * frequency, use this pier and the previous
2648 * one to interpolate */
2649 if (target < pcinfo[i].freq) {
2657 *pcinfo_l = &pcinfo[idx_l];
2658 *pcinfo_r = &pcinfo[idx_r];
2662 * ath5k_get_rate_pcal_data() - Get the interpolated per-rate power
2664 * @ah: The &struct ath5k_hw *ah,
2665 * @channel: The &struct ieee80211_channel
2666 * @rates: The &struct ath5k_rate_pcal_info to fill
2668 * Get the surrounding per-rate power calibration data
2669 * for a given frequency and interpolate between power
2670 * values to set max target power supported by hw for
2671 * each rate on this frequency.
2674 ath5k_get_rate_pcal_data(struct ath5k_hw *ah,
2675 struct ieee80211_channel *channel,
2676 struct ath5k_rate_pcal_info *rates)
2678 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2679 struct ath5k_rate_pcal_info *rpinfo;
2682 u32 target = channel->center_freq;
2687 switch (channel->hw_value) {
2689 rpinfo = ee->ee_rate_tpwr_a;
2690 mode = AR5K_EEPROM_MODE_11A;
2693 rpinfo = ee->ee_rate_tpwr_b;
2694 mode = AR5K_EEPROM_MODE_11B;
2698 rpinfo = ee->ee_rate_tpwr_g;
2699 mode = AR5K_EEPROM_MODE_11G;
2702 max = ee->ee_rate_target_pwr_num[mode] - 1;
2704 /* Get the surrounding calibration
2705 * piers - same as above */
2706 if (target < rpinfo[0].freq) {
2711 if (target > rpinfo[max].freq) {
2712 idx_l = idx_r = max;
2716 for (i = 0; i <= max; i++) {
2718 if (rpinfo[i].freq == target) {
2723 if (target < rpinfo[i].freq) {
2731 /* Now interpolate power value, based on the frequency */
2732 rates->freq = target;
2734 rates->target_power_6to24 =
2735 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2737 rpinfo[idx_l].target_power_6to24,
2738 rpinfo[idx_r].target_power_6to24);
2740 rates->target_power_36 =
2741 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2743 rpinfo[idx_l].target_power_36,
2744 rpinfo[idx_r].target_power_36);
2746 rates->target_power_48 =
2747 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2749 rpinfo[idx_l].target_power_48,
2750 rpinfo[idx_r].target_power_48);
2752 rates->target_power_54 =
2753 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2755 rpinfo[idx_l].target_power_54,
2756 rpinfo[idx_r].target_power_54);
2760 * ath5k_get_max_ctl_power() - Get max edge power for a given frequency
2761 * @ah: the &struct ath5k_hw
2762 * @channel: The &struct ieee80211_channel
2764 * Get the max edge power for this channel if
2765 * we have such data from EEPROM's Conformance Test
2766 * Limits (CTL), and limit max power if needed.
2769 ath5k_get_max_ctl_power(struct ath5k_hw *ah,
2770 struct ieee80211_channel *channel)
2772 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
2773 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2774 struct ath5k_edge_power *rep = ee->ee_ctl_pwr;
2775 u8 *ctl_val = ee->ee_ctl;
2776 s16 max_chan_pwr = ah->ah_txpower.txp_max_pwr / 4;
2781 u32 target = channel->center_freq;
2783 ctl_mode = ath_regd_get_band_ctl(regulatory, channel->band);
2785 switch (channel->hw_value) {
2787 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
2788 ctl_mode |= AR5K_CTL_TURBO;
2790 ctl_mode |= AR5K_CTL_11A;
2793 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
2794 ctl_mode |= AR5K_CTL_TURBOG;
2796 ctl_mode |= AR5K_CTL_11G;
2799 ctl_mode |= AR5K_CTL_11B;
2805 for (i = 0; i < ee->ee_ctls; i++) {
2806 if (ctl_val[i] == ctl_mode) {
2812 /* If we have a CTL dataset available grab it and find the
2813 * edge power for our frequency */
2814 if (ctl_idx == 0xFF)
2817 /* Edge powers are sorted by frequency from lower
2818 * to higher. Each CTL corresponds to 8 edge power
2820 rep_idx = ctl_idx * AR5K_EEPROM_N_EDGES;
2822 /* Don't do boundaries check because we
2823 * might have more that one bands defined
2826 /* Get the edge power that's closer to our
2828 for (i = 0; i < AR5K_EEPROM_N_EDGES; i++) {
2830 if (target <= rep[rep_idx].freq)
2831 edge_pwr = (s16) rep[rep_idx].edge;
2835 ah->ah_txpower.txp_max_pwr = 4 * min(edge_pwr, max_chan_pwr);
2840 * Power to PCDAC table functions
2844 * DOC: Power to PCDAC table functions
2846 * For RF5111 we have an XPD -eXternal Power Detector- curve
2847 * for each calibrated channel. Each curve has 0,5dB Power steps
2848 * on x axis and PCDAC steps (offsets) on y axis and looks like an
2849 * exponential function. To recreate the curve we read 11 points
2850 * from eeprom (eeprom.c) and interpolate here.
2852 * For RF5112 we have 4 XPD -eXternal Power Detector- curves
2853 * for each calibrated channel on 0, -6, -12 and -18dBm but we only
2854 * use the higher (3) and the lower (0) curves. Each curve again has 0.5dB
2855 * power steps on x axis and PCDAC steps on y axis and looks like a
2856 * linear function. To recreate the curve and pass the power values
2857 * on hw, we get 4 points for xpd 0 (lower gain -> max power)
2858 * and 3 points for xpd 3 (higher gain -> lower power) from eeprom (eeprom.c)
2859 * and interpolate here.
2861 * For a given channel we get the calibrated points (piers) for it or
2862 * -if we don't have calibration data for this specific channel- from the
2863 * available surrounding channels we have calibration data for, after we do a
2864 * linear interpolation between them. Then since we have our calibrated points
2865 * for this channel, we do again a linear interpolation between them to get the
2868 * We finally write the Y values of the curve(s) (the PCDAC values) on hw
2872 * ath5k_fill_pwr_to_pcdac_table() - Fill Power to PCDAC table on RF5111
2873 * @ah: The &struct ath5k_hw
2874 * @table_min: Minimum power (x min)
2875 * @table_max: Maximum power (x max)
2877 * No further processing is needed for RF5111, the only thing we have to
2878 * do is fill the values below and above calibration range since eeprom data
2879 * may not cover the entire PCDAC table.
2882 ath5k_fill_pwr_to_pcdac_table(struct ath5k_hw *ah, s16* table_min,
2885 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2886 u8 *pcdac_tmp = ah->ah_txpower.tmpL[0];
2887 u8 pcdac_0, pcdac_n, pcdac_i, pwr_idx, i;
2888 s16 min_pwr, max_pwr;
2890 /* Get table boundaries */
2891 min_pwr = table_min[0];
2892 pcdac_0 = pcdac_tmp[0];
2894 max_pwr = table_max[0];
2895 pcdac_n = pcdac_tmp[table_max[0] - table_min[0]];
2897 /* Extrapolate below minimum using pcdac_0 */
2899 for (i = 0; i < min_pwr; i++)
2900 pcdac_out[pcdac_i++] = pcdac_0;
2902 /* Copy values from pcdac_tmp */
2904 for (i = 0; pwr_idx <= max_pwr &&
2905 pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE; i++) {
2906 pcdac_out[pcdac_i++] = pcdac_tmp[i];
2910 /* Extrapolate above maximum */
2911 while (pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE)
2912 pcdac_out[pcdac_i++] = pcdac_n;
2917 * ath5k_combine_linear_pcdac_curves() - Combine available PCDAC Curves
2918 * @ah: The &struct ath5k_hw
2919 * @table_min: Minimum power (x min)
2920 * @table_max: Maximum power (x max)
2921 * @pdcurves: Number of pd curves
2923 * Combine available XPD Curves and fill Linear Power to PCDAC table on RF5112
2924 * RFX112 can have up to 2 curves (one for low txpower range and one for
2925 * higher txpower range). We need to put them both on pcdac_out and place
2926 * them in the correct location. In case we only have one curve available
2927 * just fit it on pcdac_out (it's supposed to cover the entire range of
2928 * available pwr levels since it's always the higher power curve). Extrapolate
2929 * below and above final table if needed.
2932 ath5k_combine_linear_pcdac_curves(struct ath5k_hw *ah, s16* table_min,
2933 s16 *table_max, u8 pdcurves)
2935 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2942 s16 mid_pwr_idx = 0;
2943 /* Edge flag turns on the 7nth bit on the PCDAC
2944 * to declare the higher power curve (force values
2945 * to be greater than 64). If we only have one curve
2946 * we don't need to set this, if we have 2 curves and
2947 * fill the table backwards this can also be used to
2948 * switch from higher power curve to lower power curve */
2952 /* When we have only one curve available
2953 * that's the higher power curve. If we have
2954 * two curves the first is the high power curve
2955 * and the next is the low power curve. */
2957 pcdac_low_pwr = ah->ah_txpower.tmpL[1];
2958 pcdac_high_pwr = ah->ah_txpower.tmpL[0];
2959 mid_pwr_idx = table_max[1] - table_min[1] - 1;
2960 max_pwr_idx = (table_max[0] - table_min[0]) / 2;
2962 /* If table size goes beyond 31.5dB, keep the
2963 * upper 31.5dB range when setting tx power.
2964 * Note: 126 = 31.5 dB in quarter dB steps */
2965 if (table_max[0] - table_min[1] > 126)
2966 min_pwr_idx = table_max[0] - 126;
2968 min_pwr_idx = table_min[1];
2970 /* Since we fill table backwards
2971 * start from high power curve */
2972 pcdac_tmp = pcdac_high_pwr;
2976 pcdac_low_pwr = ah->ah_txpower.tmpL[1]; /* Zeroed */
2977 pcdac_high_pwr = ah->ah_txpower.tmpL[0];
2978 min_pwr_idx = table_min[0];
2979 max_pwr_idx = (table_max[0] - table_min[0]) / 2;
2980 pcdac_tmp = pcdac_high_pwr;
2984 /* This is used when setting tx power*/
2985 ah->ah_txpower.txp_min_idx = min_pwr_idx / 2;
2987 /* Fill Power to PCDAC table backwards */
2989 for (i = 63; i >= 0; i--) {
2990 /* Entering lower power range, reset
2991 * edge flag and set pcdac_tmp to lower
2993 if (edge_flag == 0x40 &&
2994 (2 * pwr <= (table_max[1] - table_min[0]) || pwr == 0)) {
2996 pcdac_tmp = pcdac_low_pwr;
2997 pwr = mid_pwr_idx / 2;
3000 /* Don't go below 1, extrapolate below if we have
3001 * already switched to the lower power curve -or
3002 * we only have one curve and edge_flag is zero
3004 if (pcdac_tmp[pwr] < 1 && (edge_flag == 0x00)) {
3006 pcdac_out[i] = pcdac_out[i + 1];
3012 pcdac_out[i] = pcdac_tmp[pwr] | edge_flag;
3014 /* Extrapolate above if pcdac is greater than
3015 * 126 -this can happen because we OR pcdac_out
3016 * value with edge_flag on high power curve */
3017 if (pcdac_out[i] > 126)
3020 /* Decrease by a 0.5dB step */
3026 * ath5k_write_pcdac_table() - Write the PCDAC values on hw
3027 * @ah: The &struct ath5k_hw
3030 ath5k_write_pcdac_table(struct ath5k_hw *ah)
3032 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
3036 * Write TX power values
3038 for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
3039 ath5k_hw_reg_write(ah,
3040 (((pcdac_out[2 * i + 0] << 8 | 0xff) & 0xffff) << 0) |
3041 (((pcdac_out[2 * i + 1] << 8 | 0xff) & 0xffff) << 16),
3042 AR5K_PHY_PCDAC_TXPOWER(i));
3048 * Power to PDADC table functions
3052 * DOC: Power to PDADC table functions
3054 * For RF2413 and later we have a Power to PDADC table (Power Detector)
3055 * instead of a PCDAC (Power Control) and 4 pd gain curves for each
3056 * calibrated channel. Each curve has power on x axis in 0.5 db steps and
3057 * PDADC steps on y axis and looks like an exponential function like the
3060 * To recreate the curves we read the points from eeprom (eeprom.c)
3061 * and interpolate here. Note that in most cases only 2 (higher and lower)
3062 * curves are used (like RF5112) but vendors have the opportunity to include
3063 * all 4 curves on eeprom. The final curve (higher power) has an extra
3064 * point for better accuracy like RF5112.
3066 * The process is similar to what we do above for RF5111/5112
3070 * ath5k_combine_pwr_to_pdadc_curves() - Combine the various PDADC curves
3071 * @ah: The &struct ath5k_hw
3072 * @pwr_min: Minimum power (x min)
3073 * @pwr_max: Maximum power (x max)
3074 * @pdcurves: Number of available curves
3076 * Combine the various pd curves and create the final Power to PDADC table
3077 * We can have up to 4 pd curves, we need to do a similar process
3078 * as we do for RF5112. This time we don't have an edge_flag but we
3079 * set the gain boundaries on a separate register.
3082 ath5k_combine_pwr_to_pdadc_curves(struct ath5k_hw *ah,
3083 s16 *pwr_min, s16 *pwr_max, u8 pdcurves)
3085 u8 gain_boundaries[AR5K_EEPROM_N_PD_GAINS];
3086 u8 *pdadc_out = ah->ah_txpower.txp_pd_table;
3089 u8 pdadc_i, pdadc_n, pwr_step, pdg, max_idx, table_size;
3092 /* Note: Register value is initialized on initvals
3093 * there is no feedback from hw.
3094 * XXX: What about pd_gain_overlap from EEPROM ? */
3095 pd_gain_overlap = (u8) ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG5) &
3096 AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP;
3098 /* Create final PDADC table */
3099 for (pdg = 0, pdadc_i = 0; pdg < pdcurves; pdg++) {
3100 pdadc_tmp = ah->ah_txpower.tmpL[pdg];
3102 if (pdg == pdcurves - 1)
3103 /* 2 dB boundary stretch for last
3104 * (higher power) curve */
3105 gain_boundaries[pdg] = pwr_max[pdg] + 4;
3107 /* Set gain boundary in the middle
3108 * between this curve and the next one */
3109 gain_boundaries[pdg] =
3110 (pwr_max[pdg] + pwr_min[pdg + 1]) / 2;
3112 /* Sanity check in case our 2 db stretch got out of
3114 if (gain_boundaries[pdg] > AR5K_TUNE_MAX_TXPOWER)
3115 gain_boundaries[pdg] = AR5K_TUNE_MAX_TXPOWER;
3117 /* For the first curve (lower power)
3118 * start from 0 dB */
3122 /* For the other curves use the gain overlap */
3123 pdadc_0 = (gain_boundaries[pdg - 1] - pwr_min[pdg]) -
3126 /* Force each power step to be at least 0.5 dB */
3127 if ((pdadc_tmp[1] - pdadc_tmp[0]) > 1)
3128 pwr_step = pdadc_tmp[1] - pdadc_tmp[0];
3132 /* If pdadc_0 is negative, we need to extrapolate
3133 * below this pdgain by a number of pwr_steps */
3134 while ((pdadc_0 < 0) && (pdadc_i < 128)) {
3135 s16 tmp = pdadc_tmp[0] + pdadc_0 * pwr_step;
3136 pdadc_out[pdadc_i++] = (tmp < 0) ? 0 : (u8) tmp;
3140 /* Set last pwr level, using gain boundaries */
3141 pdadc_n = gain_boundaries[pdg] + pd_gain_overlap - pwr_min[pdg];
3142 /* Limit it to be inside pwr range */
3143 table_size = pwr_max[pdg] - pwr_min[pdg];
3144 max_idx = (pdadc_n < table_size) ? pdadc_n : table_size;
3146 /* Fill pdadc_out table */
3147 while (pdadc_0 < max_idx && pdadc_i < 128)
3148 pdadc_out[pdadc_i++] = pdadc_tmp[pdadc_0++];
3150 /* Need to extrapolate above this pdgain? */
3151 if (pdadc_n <= max_idx)
3154 /* Force each power step to be at least 0.5 dB */
3155 if ((pdadc_tmp[table_size - 1] - pdadc_tmp[table_size - 2]) > 1)
3156 pwr_step = pdadc_tmp[table_size - 1] -
3157 pdadc_tmp[table_size - 2];
3161 /* Extrapolate above */
3162 while ((pdadc_0 < (s16) pdadc_n) &&
3163 (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2)) {
3164 s16 tmp = pdadc_tmp[table_size - 1] +
3165 (pdadc_0 - max_idx) * pwr_step;
3166 pdadc_out[pdadc_i++] = (tmp > 127) ? 127 : (u8) tmp;
3171 while (pdg < AR5K_EEPROM_N_PD_GAINS) {
3172 gain_boundaries[pdg] = gain_boundaries[pdg - 1];
3176 while (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2) {
3177 pdadc_out[pdadc_i] = pdadc_out[pdadc_i - 1];
3181 /* Set gain boundaries */
3182 ath5k_hw_reg_write(ah,
3183 AR5K_REG_SM(pd_gain_overlap,
3184 AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP) |
3185 AR5K_REG_SM(gain_boundaries[0],
3186 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_1) |
3187 AR5K_REG_SM(gain_boundaries[1],
3188 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_2) |
3189 AR5K_REG_SM(gain_boundaries[2],
3190 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_3) |
3191 AR5K_REG_SM(gain_boundaries[3],
3192 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_4),
3195 /* Used for setting rate power table */
3196 ah->ah_txpower.txp_min_idx = pwr_min[0];
3201 * ath5k_write_pwr_to_pdadc_table() - Write the PDADC values on hw
3202 * @ah: The &struct ath5k_hw
3203 * @ee_mode: One of enum ath5k_driver_mode
3206 ath5k_write_pwr_to_pdadc_table(struct ath5k_hw *ah, u8 ee_mode)
3208 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
3209 u8 *pdadc_out = ah->ah_txpower.txp_pd_table;
3210 u8 *pdg_to_idx = ee->ee_pdc_to_idx[ee_mode];
3211 u8 pdcurves = ee->ee_pd_gains[ee_mode];
3215 /* Select the right pdgain curves */
3217 /* Clear current settings */
3218 reg = ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG1);
3219 reg &= ~(AR5K_PHY_TPC_RG1_PDGAIN_1 |
3220 AR5K_PHY_TPC_RG1_PDGAIN_2 |
3221 AR5K_PHY_TPC_RG1_PDGAIN_3 |
3222 AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
3225 * Use pd_gains curve from eeprom
3227 * This overrides the default setting from initvals
3228 * in case some vendors (e.g. Zcomax) don't use the default
3229 * curves. If we don't honor their settings we 'll get a
3230 * 5dB (1 * gain overlap ?) drop.
3232 reg |= AR5K_REG_SM(pdcurves, AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
3236 reg |= AR5K_REG_SM(pdg_to_idx[2], AR5K_PHY_TPC_RG1_PDGAIN_3);
3239 reg |= AR5K_REG_SM(pdg_to_idx[1], AR5K_PHY_TPC_RG1_PDGAIN_2);
3242 reg |= AR5K_REG_SM(pdg_to_idx[0], AR5K_PHY_TPC_RG1_PDGAIN_1);
3245 ath5k_hw_reg_write(ah, reg, AR5K_PHY_TPC_RG1);
3248 * Write TX power values
3250 for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
3251 u32 val = get_unaligned_le32(&pdadc_out[4 * i]);
3252 ath5k_hw_reg_write(ah, val, AR5K_PHY_PDADC_TXPOWER(i));
3258 * Common code for PCDAC/PDADC tables
3262 * ath5k_setup_channel_powertable() - Set up power table for this channel
3263 * @ah: The &struct ath5k_hw
3264 * @channel: The &struct ieee80211_channel
3265 * @ee_mode: One of enum ath5k_driver_mode
3266 * @type: One of enum ath5k_powertable_type (eeprom.h)
3268 * This is the main function that uses all of the above
3269 * to set PCDAC/PDADC table on hw for the current channel.
3270 * This table is used for tx power calibration on the baseband,
3271 * without it we get weird tx power levels and in some cases
3272 * distorted spectral mask
3275 ath5k_setup_channel_powertable(struct ath5k_hw *ah,
3276 struct ieee80211_channel *channel,
3277 u8 ee_mode, u8 type)
3279 struct ath5k_pdgain_info *pdg_L, *pdg_R;
3280 struct ath5k_chan_pcal_info *pcinfo_L;
3281 struct ath5k_chan_pcal_info *pcinfo_R;
3282 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
3283 u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode];
3284 s16 table_min[AR5K_EEPROM_N_PD_GAINS];
3285 s16 table_max[AR5K_EEPROM_N_PD_GAINS];
3288 u32 target = channel->center_freq;
3291 /* Get surrounding freq piers for this channel */
3292 ath5k_get_chan_pcal_surrounding_piers(ah, channel,
3296 /* Loop over pd gain curves on
3297 * surrounding freq piers by index */
3298 for (pdg = 0; pdg < ee->ee_pd_gains[ee_mode]; pdg++) {
3300 /* Fill curves in reverse order
3301 * from lower power (max gain)
3302 * to higher power. Use curve -> idx
3303 * backmapping we did on eeprom init */
3304 u8 idx = pdg_curve_to_idx[pdg];
3306 /* Grab the needed curves by index */
3307 pdg_L = &pcinfo_L->pd_curves[idx];
3308 pdg_R = &pcinfo_R->pd_curves[idx];
3310 /* Initialize the temp tables */
3311 tmpL = ah->ah_txpower.tmpL[pdg];
3312 tmpR = ah->ah_txpower.tmpR[pdg];
3314 /* Set curve's x boundaries and create
3315 * curves so that they cover the same
3316 * range (if we don't do that one table
3317 * will have values on some range and the
3318 * other one won't have any so interpolation
3320 table_min[pdg] = min(pdg_L->pd_pwr[0],
3321 pdg_R->pd_pwr[0]) / 2;
3323 table_max[pdg] = max(pdg_L->pd_pwr[pdg_L->pd_points - 1],
3324 pdg_R->pd_pwr[pdg_R->pd_points - 1]) / 2;
3326 /* Now create the curves on surrounding channels
3327 * and interpolate if needed to get the final
3328 * curve for this gain on this channel */
3330 case AR5K_PWRTABLE_LINEAR_PCDAC:
3331 /* Override min/max so that we don't loose
3332 * accuracy (don't divide by 2) */
3333 table_min[pdg] = min(pdg_L->pd_pwr[0],
3337 max(pdg_L->pd_pwr[pdg_L->pd_points - 1],
3338 pdg_R->pd_pwr[pdg_R->pd_points - 1]);
3340 /* Override minimum so that we don't get
3341 * out of bounds while extrapolating
3342 * below. Don't do this when we have 2
3343 * curves and we are on the high power curve
3344 * because table_min is ok in this case */
3345 if (!(ee->ee_pd_gains[ee_mode] > 1 && pdg == 0)) {
3348 ath5k_get_linear_pcdac_min(pdg_L->pd_step,
3353 /* Don't go too low because we will
3354 * miss the upper part of the curve.
3355 * Note: 126 = 31.5dB (max power supported)
3356 * in 0.25dB units */
3357 if (table_max[pdg] - table_min[pdg] > 126)
3358 table_min[pdg] = table_max[pdg] - 126;
3362 case AR5K_PWRTABLE_PWR_TO_PCDAC:
3363 case AR5K_PWRTABLE_PWR_TO_PDADC:
3365 ath5k_create_power_curve(table_min[pdg],
3369 pdg_L->pd_points, tmpL, type);
3371 /* We are in a calibration
3372 * pier, no need to interpolate
3373 * between freq piers */
3374 if (pcinfo_L == pcinfo_R)
3377 ath5k_create_power_curve(table_min[pdg],
3381 pdg_R->pd_points, tmpR, type);
3387 /* Interpolate between curves
3388 * of surrounding freq piers to
3389 * get the final curve for this
3390 * pd gain. Re-use tmpL for interpolation
3392 for (i = 0; (i < (u16) (table_max[pdg] - table_min[pdg])) &&
3393 (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) {
3394 tmpL[i] = (u8) ath5k_get_interpolated_value(target,
3395 (s16) pcinfo_L->freq,
3396 (s16) pcinfo_R->freq,
3402 /* Now we have a set of curves for this
3403 * channel on tmpL (x range is table_max - table_min
3404 * and y values are tmpL[pdg][]) sorted in the same
3405 * order as EEPROM (because we've used the backmapping).
3406 * So for RF5112 it's from higher power to lower power
3407 * and for RF2413 it's from lower power to higher power.
3408 * For RF5111 we only have one curve. */
3410 /* Fill min and max power levels for this
3411 * channel by interpolating the values on
3412 * surrounding channels to complete the dataset */
3413 ah->ah_txpower.txp_min_pwr = ath5k_get_interpolated_value(target,
3414 (s16) pcinfo_L->freq,
3415 (s16) pcinfo_R->freq,
3416 pcinfo_L->min_pwr, pcinfo_R->min_pwr);
3418 ah->ah_txpower.txp_max_pwr = ath5k_get_interpolated_value(target,
3419 (s16) pcinfo_L->freq,
3420 (s16) pcinfo_R->freq,
3421 pcinfo_L->max_pwr, pcinfo_R->max_pwr);
3423 /* Fill PCDAC/PDADC table */
3425 case AR5K_PWRTABLE_LINEAR_PCDAC:
3426 /* For RF5112 we can have one or two curves
3427 * and each curve covers a certain power lvl
3428 * range so we need to do some more processing */
3429 ath5k_combine_linear_pcdac_curves(ah, table_min, table_max,
3430 ee->ee_pd_gains[ee_mode]);
3432 /* Set txp.offset so that we can
3433 * match max power value with max
3435 ah->ah_txpower.txp_offset = 64 - (table_max[0] / 2);
3437 case AR5K_PWRTABLE_PWR_TO_PCDAC:
3438 /* We are done for RF5111 since it has only
3439 * one curve, just fit the curve on the table */
3440 ath5k_fill_pwr_to_pcdac_table(ah, table_min, table_max);
3442 /* No rate powertable adjustment for RF5111 */
3443 ah->ah_txpower.txp_min_idx = 0;
3444 ah->ah_txpower.txp_offset = 0;
3446 case AR5K_PWRTABLE_PWR_TO_PDADC:
3447 /* Set PDADC boundaries and fill
3448 * final PDADC table */
3449 ath5k_combine_pwr_to_pdadc_curves(ah, table_min, table_max,
3450 ee->ee_pd_gains[ee_mode]);
3452 /* Set txp.offset, note that table_min
3453 * can be negative */
3454 ah->ah_txpower.txp_offset = table_min[0];
3460 ah->ah_txpower.txp_setup = true;
3466 * ath5k_write_channel_powertable() - Set power table for current channel on hw
3467 * @ah: The &struct ath5k_hw
3468 * @ee_mode: One of enum ath5k_driver_mode
3469 * @type: One of enum ath5k_powertable_type (eeprom.h)
3472 ath5k_write_channel_powertable(struct ath5k_hw *ah, u8 ee_mode, u8 type)
3474 if (type == AR5K_PWRTABLE_PWR_TO_PDADC)
3475 ath5k_write_pwr_to_pdadc_table(ah, ee_mode);
3477 ath5k_write_pcdac_table(ah);
3482 * DOC: Per-rate tx power setting
3484 * This is the code that sets the desired tx power limit (below
3485 * maximum) on hw for each rate (we also have TPC that sets
3486 * power per packet type). We do that by providing an index on the
3487 * PCDAC/PDADC table we set up above, for each rate.
3489 * For now we only limit txpower based on maximum tx power
3490 * supported by hw (what's inside rate_info) + conformance test
3491 * limits. We need to limit this even more, based on regulatory domain
3492 * etc to be safe. Normally this is done from above so we don't care
3493 * here, all we care is that the tx power we set will be O.K.
3494 * for the hw (e.g. won't create noise on PA etc).
3496 * Rate power table contains indices to PCDAC/PDADC table (0.5dB steps -
3497 * x values) and is indexed as follows:
3498 * rates[0] - rates[7] -> OFDM rates
3499 * rates[8] - rates[14] -> CCK rates
3500 * rates[15] -> XR rates (they all have the same power)
3504 * ath5k_setup_rate_powertable() - Set up rate power table for a given tx power
3505 * @ah: The &struct ath5k_hw
3506 * @max_pwr: The maximum tx power requested in 0.5dB steps
3507 * @rate_info: The &struct ath5k_rate_pcal_info to fill
3508 * @ee_mode: One of enum ath5k_driver_mode
3511 ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr,
3512 struct ath5k_rate_pcal_info *rate_info,
3517 s16 rate_idx_scaled = 0;
3519 /* max_pwr is power level we got from driver/user in 0.5dB
3520 * units, switch to 0.25dB units so we can compare */
3522 max_pwr = min(max_pwr, (u16) ah->ah_txpower.txp_max_pwr) / 2;
3524 /* apply rate limits */
3525 rates = ah->ah_txpower.txp_rates_power_table;
3527 /* OFDM rates 6 to 24Mb/s */
3528 for (i = 0; i < 5; i++)
3529 rates[i] = min(max_pwr, rate_info->target_power_6to24);
3531 /* Rest OFDM rates */
3532 rates[5] = min(rates[0], rate_info->target_power_36);
3533 rates[6] = min(rates[0], rate_info->target_power_48);
3534 rates[7] = min(rates[0], rate_info->target_power_54);
3538 rates[8] = min(rates[0], rate_info->target_power_6to24);
3540 rates[9] = min(rates[0], rate_info->target_power_36);
3542 rates[10] = min(rates[0], rate_info->target_power_36);
3544 rates[11] = min(rates[0], rate_info->target_power_48);
3546 rates[12] = min(rates[0], rate_info->target_power_48);
3548 rates[13] = min(rates[0], rate_info->target_power_54);
3550 rates[14] = min(rates[0], rate_info->target_power_54);
3553 rates[15] = min(rates[0], rate_info->target_power_6to24);
3555 /* CCK rates have different peak to average ratio
3556 * so we have to tweak their power so that gainf
3557 * correction works ok. For this we use OFDM to
3558 * CCK delta from eeprom */
3559 if ((ee_mode == AR5K_EEPROM_MODE_11G) &&
3560 (ah->ah_phy_revision < AR5K_SREV_PHY_5212A))
3561 for (i = 8; i <= 15; i++)
3562 rates[i] -= ah->ah_txpower.txp_cck_ofdm_gainf_delta;
3564 /* Save min/max and current tx power for this channel
3567 * Note: We use rates[0] for current tx power because
3568 * it covers most of the rates, in most cases. It's our
3569 * tx power limit and what the user expects to see. */
3570 ah->ah_txpower.txp_min_pwr = 2 * rates[7];
3571 ah->ah_txpower.txp_cur_pwr = 2 * rates[0];
3573 /* Set max txpower for correct OFDM operation on all rates
3574 * -that is the txpower for 54Mbit-, it's used for the PAPD
3575 * gain probe and it's in 0.5dB units */
3576 ah->ah_txpower.txp_ofdm = rates[7];
3578 /* Now that we have all rates setup use table offset to
3579 * match the power range set by user with the power indices
3580 * on PCDAC/PDADC table */
3581 for (i = 0; i < 16; i++) {
3582 rate_idx_scaled = rates[i] + ah->ah_txpower.txp_offset;
3583 /* Don't get out of bounds */
3584 if (rate_idx_scaled > 63)
3585 rate_idx_scaled = 63;
3586 if (rate_idx_scaled < 0)
3587 rate_idx_scaled = 0;
3588 rates[i] = rate_idx_scaled;
3594 * ath5k_hw_txpower() - Set transmission power limit for a given channel
3595 * @ah: The &struct ath5k_hw
3596 * @channel: The &struct ieee80211_channel
3597 * @txpower: Requested tx power in 0.5dB steps
3599 * Combines all of the above to set the requested tx power limit
3603 ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
3606 struct ath5k_rate_pcal_info rate_info;
3607 struct ieee80211_channel *curr_channel = ah->ah_current_channel;
3612 if (txpower > AR5K_TUNE_MAX_TXPOWER) {
3613 ATH5K_ERR(ah, "invalid tx power: %u\n", txpower);
3617 ee_mode = ath5k_eeprom_mode_from_channel(ah, channel);
3619 /* Initialize TX power table */
3620 switch (ah->ah_radio) {
3625 type = AR5K_PWRTABLE_PWR_TO_PCDAC;
3628 type = AR5K_PWRTABLE_LINEAR_PCDAC;
3635 type = AR5K_PWRTABLE_PWR_TO_PDADC;
3642 * If we don't change channel/mode skip tx powertable calculation
3643 * and use the cached one.
3645 if (!ah->ah_txpower.txp_setup ||
3646 (channel->hw_value != curr_channel->hw_value) ||
3647 (channel->center_freq != curr_channel->center_freq)) {
3648 /* Reset TX power values but preserve requested
3649 * tx power from above */
3650 int requested_txpower = ah->ah_txpower.txp_requested;
3652 memset(&ah->ah_txpower, 0, sizeof(ah->ah_txpower));
3654 /* Restore TPC setting and requested tx power */
3655 ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER;
3657 ah->ah_txpower.txp_requested = requested_txpower;
3659 /* Calculate the powertable */
3660 ret = ath5k_setup_channel_powertable(ah, channel,
3666 /* Write table on hw */
3667 ath5k_write_channel_powertable(ah, ee_mode, type);
3669 /* Limit max power if we have a CTL available */
3670 ath5k_get_max_ctl_power(ah, channel);
3672 /* FIXME: Antenna reduction stuff */
3674 /* FIXME: Limit power on turbo modes */
3676 /* FIXME: TPC scale reduction */
3678 /* Get surrounding channels for per-rate power table
3680 ath5k_get_rate_pcal_data(ah, channel, &rate_info);
3682 /* Setup rate power table */
3683 ath5k_setup_rate_powertable(ah, txpower, &rate_info, ee_mode);
3685 /* Write rate power table on hw */
3686 ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(3, 24) |
3687 AR5K_TXPOWER_OFDM(2, 16) | AR5K_TXPOWER_OFDM(1, 8) |
3688 AR5K_TXPOWER_OFDM(0, 0), AR5K_PHY_TXPOWER_RATE1);
3690 ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(7, 24) |
3691 AR5K_TXPOWER_OFDM(6, 16) | AR5K_TXPOWER_OFDM(5, 8) |
3692 AR5K_TXPOWER_OFDM(4, 0), AR5K_PHY_TXPOWER_RATE2);
3694 ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(10, 24) |
3695 AR5K_TXPOWER_CCK(9, 16) | AR5K_TXPOWER_CCK(15, 8) |
3696 AR5K_TXPOWER_CCK(8, 0), AR5K_PHY_TXPOWER_RATE3);
3698 ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(14, 24) |
3699 AR5K_TXPOWER_CCK(13, 16) | AR5K_TXPOWER_CCK(12, 8) |
3700 AR5K_TXPOWER_CCK(11, 0), AR5K_PHY_TXPOWER_RATE4);
3702 /* FIXME: TPC support */
3703 if (ah->ah_txpower.txp_tpc) {
3704 ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX_TPC_ENABLE |
3705 AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
3707 ath5k_hw_reg_write(ah,
3708 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_ACK) |
3709 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CTS) |
3710 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CHIRP),
3713 ath5k_hw_reg_write(ah, AR5K_TUNE_MAX_TXPOWER,
3714 AR5K_PHY_TXPOWER_RATE_MAX);
3721 * ath5k_hw_set_txpower_limit() - Set txpower limit for the current channel
3722 * @ah: The &struct ath5k_hw
3723 * @txpower: The requested tx power limit in 0.5dB steps
3725 * This function provides access to ath5k_hw_txpower to the driver in
3726 * case user or an application changes it while PHY is running.
3729 ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, u8 txpower)
3731 ATH5K_DBG(ah, ATH5K_DEBUG_TXPOWER,
3732 "changing txpower to %d\n", txpower);
3734 return ath5k_hw_txpower(ah, ah->ah_current_channel, txpower);
3743 * ath5k_hw_phy_init() - Initialize PHY
3744 * @ah: The &struct ath5k_hw
3745 * @channel: The @struct ieee80211_channel
3746 * @mode: One of enum ath5k_driver_mode
3747 * @fast: Try a fast channel switch instead
3749 * This is the main function used during reset to initialize PHY
3750 * or do a fast channel change if possible.
3752 * NOTE: Do not call this one from the driver, it assumes PHY is in a
3753 * warm reset state !
3756 ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
3759 struct ieee80211_channel *curr_channel;
3765 * Sanity check for fast flag
3766 * Don't try fast channel change when changing modulation
3767 * mode/band. We check for chip compatibility on
3770 curr_channel = ah->ah_current_channel;
3771 if (fast && (channel->hw_value != curr_channel->hw_value))
3775 * On fast channel change we only set the synth parameters
3776 * while PHY is running, enable calibration and skip the rest.
3779 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_RFBUS_REQ,
3780 AR5K_PHY_RFBUS_REQ_REQUEST);
3781 for (i = 0; i < 100; i++) {
3782 if (ath5k_hw_reg_read(ah, AR5K_PHY_RFBUS_GRANT))
3790 /* Set channel and wait for synth */
3791 ret = ath5k_hw_channel(ah, channel);
3795 ath5k_hw_wait_for_synth(ah, channel);
3801 * Note: We need to do that before we set
3802 * RF buffer settings on 5211/5212+ so that we
3803 * properly set curve indices.
3805 ret = ath5k_hw_txpower(ah, channel, ah->ah_txpower.txp_requested ?
3806 ah->ah_txpower.txp_requested * 2 :
3807 AR5K_TUNE_MAX_TXPOWER);
3811 /* Write OFDM timings on 5212*/
3812 if (ah->ah_version == AR5K_AR5212 &&
3813 channel->hw_value != AR5K_MODE_11B) {
3815 ret = ath5k_hw_write_ofdm_timings(ah, channel);
3819 /* Spur info is available only from EEPROM versions
3820 * greater than 5.3, but the EEPROM routines will use
3821 * static values for older versions */
3822 if (ah->ah_mac_srev >= AR5K_SREV_AR5424)
3823 ath5k_hw_set_spur_mitigation_filter(ah,
3827 /* If we used fast channel switching
3828 * we are done, release RF bus and
3829 * fire up NF calibration.
3831 * Note: Only NF calibration due to
3832 * channel change, not AGC calibration
3833 * since AGC is still running !
3837 * Release RF Bus grant
3839 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_RFBUS_REQ,
3840 AR5K_PHY_RFBUS_REQ_REQUEST);
3843 * Start NF calibration
3845 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
3846 AR5K_PHY_AGCCTL_NF);
3852 * For 5210 we do all initialization using
3853 * initvals, so we don't have to modify
3854 * any settings (5210 also only supports
3857 if (ah->ah_version != AR5K_AR5210) {
3860 * Write initial RF gain settings
3861 * This should work for both 5111/5112
3863 ret = ath5k_hw_rfgain_init(ah, channel->band);
3867 usleep_range(1000, 1500);
3872 ret = ath5k_hw_rfregs_init(ah, channel, mode);
3876 /*Enable/disable 802.11b mode on 5111
3877 (enable 2111 frequency converter + CCK)*/
3878 if (ah->ah_radio == AR5K_RF5111) {
3879 if (mode == AR5K_MODE_11B)
3880 AR5K_REG_ENABLE_BITS(ah, AR5K_TXCFG,
3883 AR5K_REG_DISABLE_BITS(ah, AR5K_TXCFG,
3887 } else if (ah->ah_version == AR5K_AR5210) {
3888 usleep_range(1000, 1500);
3889 /* Disable phy and wait */
3890 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT);
3891 usleep_range(1000, 1500);
3894 /* Set channel on PHY */
3895 ret = ath5k_hw_channel(ah, channel);
3900 * Enable the PHY and wait until completion
3901 * This includes BaseBand and Synthesizer
3904 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
3906 ath5k_hw_wait_for_synth(ah, channel);
3909 * Perform ADC test to see if baseband is ready
3910 * Set tx hold and check adc test register
3912 phy_tst1 = ath5k_hw_reg_read(ah, AR5K_PHY_TST1);
3913 ath5k_hw_reg_write(ah, AR5K_PHY_TST1_TXHOLD, AR5K_PHY_TST1);
3914 for (i = 0; i <= 20; i++) {
3915 if (!(ath5k_hw_reg_read(ah, AR5K_PHY_ADC_TEST) & 0x10))
3917 usleep_range(200, 250);
3919 ath5k_hw_reg_write(ah, phy_tst1, AR5K_PHY_TST1);
3922 * Start automatic gain control calibration
3924 * During AGC calibration RX path is re-routed to
3925 * a power detector so we don't receive anything.
3927 * This method is used to calibrate some static offsets
3928 * used together with on-the fly I/Q calibration (the
3929 * one performed via ath5k_hw_phy_calibrate), which doesn't
3930 * interrupt rx path.
3932 * While rx path is re-routed to the power detector we also
3933 * start a noise floor calibration to measure the
3934 * card's noise floor (the noise we measure when we are not
3935 * transmitting or receiving anything).
3937 * If we are in a noisy environment, AGC calibration may time
3938 * out and/or noise floor calibration might timeout.
3940 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
3941 AR5K_PHY_AGCCTL_CAL | AR5K_PHY_AGCCTL_NF);
3943 /* At the same time start I/Q calibration for QAM constellation
3944 * -no need for CCK- */
3945 ah->ah_iq_cal_needed = false;
3946 if (!(mode == AR5K_MODE_11B)) {
3947 ah->ah_iq_cal_needed = true;
3948 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
3949 AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
3950 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
3954 /* Wait for gain calibration to finish (we check for I/Q calibration
3955 * during ath5k_phy_calibrate) */
3956 if (ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
3957 AR5K_PHY_AGCCTL_CAL, 0, false)) {
3958 ATH5K_ERR(ah, "gain calibration timeout (%uMHz)\n",
3959 channel->center_freq);
3962 /* Restore antenna mode */
3963 ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode);