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 ieee80211_band
80 * Returns the revision number of a 2GHz, 5GHz or single chip
84 ath5k_hw_radio_revision(struct ath5k_hw *ah, enum ieee80211_band band)
91 * Set the radio chip access register
94 case IEEE80211_BAND_2GHZ:
95 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_2GHZ, AR5K_PHY(0));
97 case IEEE80211_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 == IEEE80211_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 == IEEE80211_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 ieee80211_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 ieee80211_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 == IEEE80211_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(sizeof(u32) * ah->ah_rf_banks_size,
895 if (ah->ah_rf_banks == NULL) {
896 ATH5K_ERR(ah, "out of memory\n");
901 /* Copy values to modify them */
902 rfb = ah->ah_rf_banks;
904 for (i = 0; i < ah->ah_rf_banks_size; i++) {
905 if (ini_rfb[i].rfb_bank >= AR5K_MAX_RF_BANKS) {
906 ATH5K_ERR(ah, "invalid bank\n");
910 /* Bank changed, write down the offset */
911 if (bank != ini_rfb[i].rfb_bank) {
912 bank = ini_rfb[i].rfb_bank;
913 ah->ah_offset[bank] = i;
916 rfb[i] = ini_rfb[i].rfb_mode_data[mode];
919 /* Set Output and Driver bias current (OB/DB) */
920 if (channel->band == IEEE80211_BAND_2GHZ) {
922 if (channel->hw_value == AR5K_MODE_11B)
923 ee_mode = AR5K_EEPROM_MODE_11B;
925 ee_mode = AR5K_EEPROM_MODE_11G;
927 /* For RF511X/RF211X combination we
928 * use b_OB and b_DB parameters stored
929 * in eeprom on ee->ee_ob[ee_mode][0]
931 * For all other chips we use OB/DB for 2GHz
932 * stored in the b/g modal section just like
933 * 802.11a on ee->ee_ob[ee_mode][1] */
934 if ((ah->ah_radio == AR5K_RF5111) ||
935 (ah->ah_radio == AR5K_RF5112))
940 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb],
941 AR5K_RF_OB_2GHZ, true);
943 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb],
944 AR5K_RF_DB_2GHZ, true);
946 /* RF5111 always needs OB/DB for 5GHz, even if we use 2GHz */
947 } else if ((channel->band == IEEE80211_BAND_5GHZ) ||
948 (ah->ah_radio == AR5K_RF5111)) {
950 /* For 11a, Turbo and XR we need to choose
951 * OB/DB based on frequency range */
952 ee_mode = AR5K_EEPROM_MODE_11A;
953 obdb = channel->center_freq >= 5725 ? 3 :
954 (channel->center_freq >= 5500 ? 2 :
955 (channel->center_freq >= 5260 ? 1 :
956 (channel->center_freq > 4000 ? 0 : -1)));
961 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb],
962 AR5K_RF_OB_5GHZ, true);
964 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb],
965 AR5K_RF_DB_5GHZ, true);
968 g_step = &go->go_step[ah->ah_gain.g_step_idx];
970 /* Set turbo mode (N/A on RF5413) */
971 if ((ah->ah_bwmode == AR5K_BWMODE_40MHZ) &&
972 (ah->ah_radio != AR5K_RF5413))
973 ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_TURBO, false);
975 /* Bank Modifications (chip-specific) */
976 if (ah->ah_radio == AR5K_RF5111) {
978 /* Set gain_F settings according to current step */
979 if (channel->hw_value != AR5K_MODE_11B) {
981 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_FRAME_CTL,
982 AR5K_PHY_FRAME_CTL_TX_CLIP,
983 g_step->gos_param[0]);
985 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1],
986 AR5K_RF_PWD_90, true);
988 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2],
989 AR5K_RF_PWD_84, true);
991 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3],
992 AR5K_RF_RFGAIN_SEL, true);
994 /* We programmed gain_F parameters, switch back
996 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
1000 /* Bank 6/7 setup */
1002 ath5k_hw_rfb_op(ah, rf_regs, !ee->ee_xpd[ee_mode],
1003 AR5K_RF_PWD_XPD, true);
1005 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_x_gain[ee_mode],
1006 AR5K_RF_XPD_GAIN, true);
1008 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode],
1009 AR5K_RF_GAIN_I, true);
1011 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode],
1012 AR5K_RF_PLO_SEL, true);
1014 /* Tweak power detectors for half/quarter rate support */
1015 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ ||
1016 ah->ah_bwmode == AR5K_BWMODE_10MHZ) {
1019 ath5k_hw_rfb_op(ah, rf_regs, 0x1f,
1020 AR5K_RF_WAIT_S, true);
1022 wait_i = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ?
1025 ath5k_hw_rfb_op(ah, rf_regs, wait_i,
1026 AR5K_RF_WAIT_I, true);
1027 ath5k_hw_rfb_op(ah, rf_regs, 3,
1028 AR5K_RF_MAX_TIME, true);
1033 if (ah->ah_radio == AR5K_RF5112) {
1035 /* Set gain_F settings according to current step */
1036 if (channel->hw_value != AR5K_MODE_11B) {
1038 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[0],
1039 AR5K_RF_MIXGAIN_OVR, true);
1041 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1],
1042 AR5K_RF_PWD_138, true);
1044 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2],
1045 AR5K_RF_PWD_137, true);
1047 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3],
1048 AR5K_RF_PWD_136, true);
1050 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[4],
1051 AR5K_RF_PWD_132, true);
1053 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[5],
1054 AR5K_RF_PWD_131, true);
1056 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[6],
1057 AR5K_RF_PWD_130, true);
1059 /* We programmed gain_F parameters, switch back
1060 * to active state */
1061 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
1064 /* Bank 6/7 setup */
1066 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode],
1067 AR5K_RF_XPD_SEL, true);
1069 if (ah->ah_radio_5ghz_revision < AR5K_SREV_RAD_5112A) {
1070 /* Rev. 1 supports only one xpd */
1071 ath5k_hw_rfb_op(ah, rf_regs,
1072 ee->ee_x_gain[ee_mode],
1073 AR5K_RF_XPD_GAIN, true);
1076 u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode];
1077 if (ee->ee_pd_gains[ee_mode] > 1) {
1078 ath5k_hw_rfb_op(ah, rf_regs,
1079 pdg_curve_to_idx[0],
1080 AR5K_RF_PD_GAIN_LO, true);
1081 ath5k_hw_rfb_op(ah, rf_regs,
1082 pdg_curve_to_idx[1],
1083 AR5K_RF_PD_GAIN_HI, true);
1085 ath5k_hw_rfb_op(ah, rf_regs,
1086 pdg_curve_to_idx[0],
1087 AR5K_RF_PD_GAIN_LO, true);
1088 ath5k_hw_rfb_op(ah, rf_regs,
1089 pdg_curve_to_idx[0],
1090 AR5K_RF_PD_GAIN_HI, true);
1093 /* Lower synth voltage on Rev 2 */
1094 if (ah->ah_radio == AR5K_RF5112 &&
1095 (ah->ah_radio_5ghz_revision & AR5K_SREV_REV) > 0) {
1096 ath5k_hw_rfb_op(ah, rf_regs, 2,
1097 AR5K_RF_HIGH_VC_CP, true);
1099 ath5k_hw_rfb_op(ah, rf_regs, 2,
1100 AR5K_RF_MID_VC_CP, true);
1102 ath5k_hw_rfb_op(ah, rf_regs, 2,
1103 AR5K_RF_LOW_VC_CP, true);
1105 ath5k_hw_rfb_op(ah, rf_regs, 2,
1106 AR5K_RF_PUSH_UP, true);
1109 /* Decrease power consumption on 5213+ BaseBand */
1110 if (ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) {
1111 ath5k_hw_rfb_op(ah, rf_regs, 1,
1112 AR5K_RF_PAD2GND, true);
1114 ath5k_hw_rfb_op(ah, rf_regs, 1,
1115 AR5K_RF_XB2_LVL, true);
1117 ath5k_hw_rfb_op(ah, rf_regs, 1,
1118 AR5K_RF_XB5_LVL, true);
1120 ath5k_hw_rfb_op(ah, rf_regs, 1,
1121 AR5K_RF_PWD_167, true);
1123 ath5k_hw_rfb_op(ah, rf_regs, 1,
1124 AR5K_RF_PWD_166, true);
1128 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode],
1129 AR5K_RF_GAIN_I, true);
1131 /* Tweak power detector for half/quarter rates */
1132 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ ||
1133 ah->ah_bwmode == AR5K_BWMODE_10MHZ) {
1136 pd_delay = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ?
1139 ath5k_hw_rfb_op(ah, rf_regs, pd_delay,
1140 AR5K_RF_PD_PERIOD_A, true);
1141 ath5k_hw_rfb_op(ah, rf_regs, 0xf,
1142 AR5K_RF_PD_DELAY_A, true);
1147 if (ah->ah_radio == AR5K_RF5413 &&
1148 channel->band == IEEE80211_BAND_2GHZ) {
1150 ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_DERBY_CHAN_SEL_MODE,
1153 /* Set optimum value for early revisions (on pci-e chips) */
1154 if (ah->ah_mac_srev >= AR5K_SREV_AR5424 &&
1155 ah->ah_mac_srev < AR5K_SREV_AR5413)
1156 ath5k_hw_rfb_op(ah, rf_regs, ath5k_hw_bitswap(6, 3),
1157 AR5K_RF_PWD_ICLOBUF_2G, true);
1161 /* Write RF banks on hw */
1162 for (i = 0; i < ah->ah_rf_banks_size; i++) {
1164 ath5k_hw_reg_write(ah, rfb[i], ini_rfb[i].rfb_ctrl_register);
1171 /**************************\
1172 PHY/RF channel functions
1173 \**************************/
1176 * ath5k_hw_rf5110_chan2athchan() - Convert channel freq on RF5110
1177 * @channel: The &struct ieee80211_channel
1179 * Map channel frequency to IEEE channel number and convert it
1180 * to an internal channel value used by the RF5110 chipset.
1183 ath5k_hw_rf5110_chan2athchan(struct ieee80211_channel *channel)
1187 athchan = (ath5k_hw_bitswap(
1188 (ieee80211_frequency_to_channel(
1189 channel->center_freq) - 24) / 2, 5)
1190 << 1) | (1 << 6) | 0x1;
1195 * ath5k_hw_rf5110_channel() - Set channel frequency on RF5110
1196 * @ah: The &struct ath5k_hw
1197 * @channel: The &struct ieee80211_channel
1200 ath5k_hw_rf5110_channel(struct ath5k_hw *ah,
1201 struct ieee80211_channel *channel)
1206 * Set the channel and wait
1208 data = ath5k_hw_rf5110_chan2athchan(channel);
1209 ath5k_hw_reg_write(ah, data, AR5K_RF_BUFFER);
1210 ath5k_hw_reg_write(ah, 0, AR5K_RF_BUFFER_CONTROL_0);
1211 usleep_range(1000, 1500);
1217 * ath5k_hw_rf5111_chan2athchan() - Handle 2GHz channels on RF5111/2111
1218 * @ieee: IEEE channel number
1219 * @athchan: The &struct ath5k_athchan_2ghz
1221 * In order to enable the RF2111 frequency converter on RF5111/2111 setups
1222 * we need to add some offsets and extra flags to the data values we pass
1223 * on to the PHY. So for every 2GHz channel this function gets called
1224 * to do the conversion.
1227 ath5k_hw_rf5111_chan2athchan(unsigned int ieee,
1228 struct ath5k_athchan_2ghz *athchan)
1232 /* Cast this value to catch negative channel numbers (>= -19) */
1233 channel = (int)ieee;
1236 * Map 2GHz IEEE channel to 5GHz Atheros channel
1238 if (channel <= 13) {
1239 athchan->a2_athchan = 115 + channel;
1240 athchan->a2_flags = 0x46;
1241 } else if (channel == 14) {
1242 athchan->a2_athchan = 124;
1243 athchan->a2_flags = 0x44;
1244 } else if (channel >= 15 && channel <= 26) {
1245 athchan->a2_athchan = ((channel - 14) * 4) + 132;
1246 athchan->a2_flags = 0x46;
1254 * ath5k_hw_rf5111_channel() - Set channel frequency on RF5111/2111
1255 * @ah: The &struct ath5k_hw
1256 * @channel: The &struct ieee80211_channel
1259 ath5k_hw_rf5111_channel(struct ath5k_hw *ah,
1260 struct ieee80211_channel *channel)
1262 struct ath5k_athchan_2ghz ath5k_channel_2ghz;
1263 unsigned int ath5k_channel =
1264 ieee80211_frequency_to_channel(channel->center_freq);
1265 u32 data0, data1, clock;
1269 * Set the channel on the RF5111 radio
1273 if (channel->band == IEEE80211_BAND_2GHZ) {
1274 /* Map 2GHz channel to 5GHz Atheros channel ID */
1275 ret = ath5k_hw_rf5111_chan2athchan(
1276 ieee80211_frequency_to_channel(channel->center_freq),
1277 &ath5k_channel_2ghz);
1281 ath5k_channel = ath5k_channel_2ghz.a2_athchan;
1282 data0 = ((ath5k_hw_bitswap(ath5k_channel_2ghz.a2_flags, 8) & 0xff)
1286 if (ath5k_channel < 145 || !(ath5k_channel & 1)) {
1288 data1 = ((ath5k_hw_bitswap(ath5k_channel - 24, 8) & 0xff) << 2) |
1289 (clock << 1) | (1 << 10) | 1;
1292 data1 = ((ath5k_hw_bitswap((ath5k_channel - 24) / 2, 8) & 0xff)
1293 << 2) | (clock << 1) | (1 << 10) | 1;
1296 ath5k_hw_reg_write(ah, (data1 & 0xff) | ((data0 & 0xff) << 8),
1298 ath5k_hw_reg_write(ah, ((data1 >> 8) & 0xff) | (data0 & 0xff00),
1299 AR5K_RF_BUFFER_CONTROL_3);
1305 * ath5k_hw_rf5112_channel() - Set channel frequency on 5112 and newer
1306 * @ah: The &struct ath5k_hw
1307 * @channel: The &struct ieee80211_channel
1309 * On RF5112/2112 and newer we don't need to do any conversion.
1310 * We pass the frequency value after a few modifications to the
1313 * NOTE: Make sure channel frequency given is within our range or else
1314 * we might damage the chip ! Use ath5k_channel_ok before calling this one.
1317 ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
1318 struct ieee80211_channel *channel)
1320 u32 data, data0, data1, data2;
1323 data = data0 = data1 = data2 = 0;
1324 c = channel->center_freq;
1326 /* My guess based on code:
1327 * 2GHz RF has 2 synth modes, one with a Local Oscillator
1328 * at 2224Hz and one with a LO at 2192Hz. IF is 1520Hz
1329 * (3040/2). data0 is used to set the PLL divider and data1
1330 * selects synth mode. */
1332 /* Channel 14 and all frequencies with 2Hz spacing
1333 * below/above (non-standard channels) */
1334 if (!((c - 2224) % 5)) {
1335 /* Same as (c - 2224) / 5 */
1336 data0 = ((2 * (c - 704)) - 3040) / 10;
1338 /* Channel 1 and all frequencies with 5Hz spacing
1339 * below/above (standard channels without channel 14) */
1340 } else if (!((c - 2192) % 5)) {
1341 /* Same as (c - 2192) / 5 */
1342 data0 = ((2 * (c - 672)) - 3040) / 10;
1347 data0 = ath5k_hw_bitswap((data0 << 2) & 0xff, 8);
1348 /* This is more complex, we have a single synthesizer with
1349 * 4 reference clock settings (?) based on frequency spacing
1350 * and set using data2. LO is at 4800Hz and data0 is again used
1351 * to set some divider.
1353 * NOTE: There is an old atheros presentation at Stanford
1354 * that mentions a method called dual direct conversion
1355 * with 1GHz sliding IF for RF5110. Maybe that's what we
1356 * have here, or an updated version. */
1357 } else if ((c % 5) != 2 || c > 5435) {
1358 if (!(c % 20) && c >= 5120) {
1359 data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
1360 data2 = ath5k_hw_bitswap(3, 2);
1361 } else if (!(c % 10)) {
1362 data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
1363 data2 = ath5k_hw_bitswap(2, 2);
1364 } else if (!(c % 5)) {
1365 data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
1366 data2 = ath5k_hw_bitswap(1, 2);
1370 data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8);
1371 data2 = ath5k_hw_bitswap(0, 2);
1374 data = (data0 << 4) | (data1 << 1) | (data2 << 2) | 0x1001;
1376 ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
1377 ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
1383 * ath5k_hw_rf2425_channel() - Set channel frequency on RF2425
1384 * @ah: The &struct ath5k_hw
1385 * @channel: The &struct ieee80211_channel
1387 * AR2425/2417 have a different 2GHz RF so code changes
1388 * a little bit from RF5112.
1391 ath5k_hw_rf2425_channel(struct ath5k_hw *ah,
1392 struct ieee80211_channel *channel)
1394 u32 data, data0, data2;
1397 data = data0 = data2 = 0;
1398 c = channel->center_freq;
1401 data0 = ath5k_hw_bitswap((c - 2272), 8);
1404 } else if ((c % 5) != 2 || c > 5435) {
1405 if (!(c % 20) && c < 5120)
1406 data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
1408 data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
1410 data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
1413 data2 = ath5k_hw_bitswap(1, 2);
1415 data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8);
1416 data2 = ath5k_hw_bitswap(0, 2);
1419 data = (data0 << 4) | data2 << 2 | 0x1001;
1421 ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
1422 ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
1428 * ath5k_hw_channel() - Set a channel on the radio chip
1429 * @ah: The &struct ath5k_hw
1430 * @channel: The &struct ieee80211_channel
1432 * This is the main function called to set a channel on the
1433 * radio chip based on the radio chip version.
1436 ath5k_hw_channel(struct ath5k_hw *ah,
1437 struct ieee80211_channel *channel)
1441 * Check bounds supported by the PHY (we don't care about regulatory
1442 * restrictions at this point).
1444 if (!ath5k_channel_ok(ah, channel)) {
1446 "channel frequency (%u MHz) out of supported "
1448 channel->center_freq);
1453 * Set the channel and wait
1455 switch (ah->ah_radio) {
1457 ret = ath5k_hw_rf5110_channel(ah, channel);
1460 ret = ath5k_hw_rf5111_channel(ah, channel);
1464 ret = ath5k_hw_rf2425_channel(ah, channel);
1467 ret = ath5k_hw_rf5112_channel(ah, channel);
1474 /* Set JAPAN setting for channel 14 */
1475 if (channel->center_freq == 2484) {
1476 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
1477 AR5K_PHY_CCKTXCTL_JAPAN);
1479 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
1480 AR5K_PHY_CCKTXCTL_WORLD);
1483 ah->ah_current_channel = channel;
1494 * DOC: PHY Calibration routines
1496 * Noise floor calibration: When we tell the hardware to
1497 * perform a noise floor calibration by setting the
1498 * AR5K_PHY_AGCCTL_NF bit on AR5K_PHY_AGCCTL, it will periodically
1499 * sample-and-hold the minimum noise level seen at the antennas.
1500 * This value is then stored in a ring buffer of recently measured
1501 * noise floor values so we have a moving window of the last few
1502 * samples. The median of the values in the history is then loaded
1503 * into the hardware for its own use for RSSI and CCA measurements.
1504 * This type of calibration doesn't interfere with traffic.
1506 * AGC calibration: When we tell the hardware to perform
1507 * an AGC (Automatic Gain Control) calibration by setting the
1508 * AR5K_PHY_AGCCTL_CAL, hw disconnects the antennas and does
1509 * a calibration on the DC offsets of ADCs. During this period
1510 * rx/tx gets disabled so we have to deal with it on the driver
1513 * I/Q calibration: When we tell the hardware to perform
1514 * an I/Q calibration, it tries to correct I/Q imbalance and
1515 * fix QAM constellation by sampling data from rxed frames.
1516 * It doesn't interfere with traffic.
1518 * For more infos on AGC and I/Q calibration check out patent doc
1523 * ath5k_hw_read_measured_noise_floor() - Read measured NF from hw
1524 * @ah: The &struct ath5k_hw
1527 ath5k_hw_read_measured_noise_floor(struct ath5k_hw *ah)
1531 val = ath5k_hw_reg_read(ah, AR5K_PHY_NF);
1532 return sign_extend32(AR5K_REG_MS(val, AR5K_PHY_NF_MINCCA_PWR), 8);
1536 * ath5k_hw_init_nfcal_hist() - Initialize NF calibration history buffer
1537 * @ah: The &struct ath5k_hw
1540 ath5k_hw_init_nfcal_hist(struct ath5k_hw *ah)
1544 ah->ah_nfcal_hist.index = 0;
1545 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++)
1546 ah->ah_nfcal_hist.nfval[i] = AR5K_TUNE_CCA_MAX_GOOD_VALUE;
1550 * ath5k_hw_update_nfcal_hist() - Update NF calibration history buffer
1551 * @ah: The &struct ath5k_hw
1552 * @noise_floor: The NF we got from hw
1554 static void ath5k_hw_update_nfcal_hist(struct ath5k_hw *ah, s16 noise_floor)
1556 struct ath5k_nfcal_hist *hist = &ah->ah_nfcal_hist;
1557 hist->index = (hist->index + 1) & (ATH5K_NF_CAL_HIST_MAX - 1);
1558 hist->nfval[hist->index] = noise_floor;
1562 * ath5k_hw_get_median_noise_floor() - Get median NF from history buffer
1563 * @ah: The &struct ath5k_hw
1566 ath5k_hw_get_median_noise_floor(struct ath5k_hw *ah)
1568 s16 sort[ATH5K_NF_CAL_HIST_MAX];
1572 memcpy(sort, ah->ah_nfcal_hist.nfval, sizeof(sort));
1573 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX - 1; i++) {
1574 for (j = 1; j < ATH5K_NF_CAL_HIST_MAX - i; j++) {
1575 if (sort[j] > sort[j - 1]) {
1577 sort[j] = sort[j - 1];
1582 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++) {
1583 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1584 "cal %d:%d\n", i, sort[i]);
1586 return sort[(ATH5K_NF_CAL_HIST_MAX - 1) / 2];
1590 * ath5k_hw_update_noise_floor() - Update NF on hardware
1591 * @ah: The &struct ath5k_hw
1593 * This is the main function we call to perform a NF calibration,
1594 * it reads NF from hardware, calculates the median and updates
1598 ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
1600 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1605 /* keep last value if calibration hasn't completed */
1606 if (ath5k_hw_reg_read(ah, AR5K_PHY_AGCCTL) & AR5K_PHY_AGCCTL_NF) {
1607 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1608 "NF did not complete in calibration window\n");
1613 ah->ah_cal_mask |= AR5K_CALIBRATION_NF;
1615 ee_mode = ath5k_eeprom_mode_from_channel(ah->ah_current_channel);
1616 if (WARN_ON(ee_mode < 0)) {
1617 ah->ah_cal_mask &= ~AR5K_CALIBRATION_NF;
1621 /* completed NF calibration, test threshold */
1622 nf = ath5k_hw_read_measured_noise_floor(ah);
1623 threshold = ee->ee_noise_floor_thr[ee_mode];
1625 if (nf > threshold) {
1626 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1627 "noise floor failure detected; "
1628 "read %d, threshold %d\n",
1631 nf = AR5K_TUNE_CCA_MAX_GOOD_VALUE;
1634 ath5k_hw_update_nfcal_hist(ah, nf);
1635 nf = ath5k_hw_get_median_noise_floor(ah);
1637 /* load noise floor (in .5 dBm) so the hardware will use it */
1638 val = ath5k_hw_reg_read(ah, AR5K_PHY_NF) & ~AR5K_PHY_NF_M;
1639 val |= (nf * 2) & AR5K_PHY_NF_M;
1640 ath5k_hw_reg_write(ah, val, AR5K_PHY_NF);
1642 AR5K_REG_MASKED_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF,
1643 ~(AR5K_PHY_AGCCTL_NF_EN | AR5K_PHY_AGCCTL_NF_NOUPDATE));
1645 ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF,
1649 * Load a high max CCA Power value (-50 dBm in .5 dBm units)
1650 * so that we're not capped by the median we just loaded.
1651 * This will be used as the initial value for the next noise
1652 * floor calibration.
1654 val = (val & ~AR5K_PHY_NF_M) | ((-50 * 2) & AR5K_PHY_NF_M);
1655 ath5k_hw_reg_write(ah, val, AR5K_PHY_NF);
1656 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
1657 AR5K_PHY_AGCCTL_NF_EN |
1658 AR5K_PHY_AGCCTL_NF_NOUPDATE |
1659 AR5K_PHY_AGCCTL_NF);
1661 ah->ah_noise_floor = nf;
1663 ah->ah_cal_mask &= ~AR5K_CALIBRATION_NF;
1665 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1666 "noise floor calibrated: %d\n", nf);
1670 * ath5k_hw_rf5110_calibrate() - Perform a PHY calibration on RF5110
1671 * @ah: The &struct ath5k_hw
1672 * @channel: The &struct ieee80211_channel
1674 * Do a complete PHY calibration (AGC + NF + I/Q) on RF5110
1677 ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah,
1678 struct ieee80211_channel *channel)
1680 u32 phy_sig, phy_agc, phy_sat, beacon;
1683 if (!(ah->ah_cal_mask & AR5K_CALIBRATION_FULL))
1687 * Disable beacons and RX/TX queues, wait
1689 AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW_5210,
1690 AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210);
1691 beacon = ath5k_hw_reg_read(ah, AR5K_BEACON_5210);
1692 ath5k_hw_reg_write(ah, beacon & ~AR5K_BEACON_ENABLE, AR5K_BEACON_5210);
1694 usleep_range(2000, 2500);
1697 * Set the channel (with AGC turned off)
1699 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1701 ret = ath5k_hw_channel(ah, channel);
1704 * Activate PHY and wait
1706 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
1707 usleep_range(1000, 1500);
1709 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1715 * Calibrate the radio chip
1718 /* Remember normal state */
1719 phy_sig = ath5k_hw_reg_read(ah, AR5K_PHY_SIG);
1720 phy_agc = ath5k_hw_reg_read(ah, AR5K_PHY_AGCCOARSE);
1721 phy_sat = ath5k_hw_reg_read(ah, AR5K_PHY_ADCSAT);
1723 /* Update radio registers */
1724 ath5k_hw_reg_write(ah, (phy_sig & ~(AR5K_PHY_SIG_FIRPWR)) |
1725 AR5K_REG_SM(-1, AR5K_PHY_SIG_FIRPWR), AR5K_PHY_SIG);
1727 ath5k_hw_reg_write(ah, (phy_agc & ~(AR5K_PHY_AGCCOARSE_HI |
1728 AR5K_PHY_AGCCOARSE_LO)) |
1729 AR5K_REG_SM(-1, AR5K_PHY_AGCCOARSE_HI) |
1730 AR5K_REG_SM(-127, AR5K_PHY_AGCCOARSE_LO), AR5K_PHY_AGCCOARSE);
1732 ath5k_hw_reg_write(ah, (phy_sat & ~(AR5K_PHY_ADCSAT_ICNT |
1733 AR5K_PHY_ADCSAT_THR)) |
1734 AR5K_REG_SM(2, AR5K_PHY_ADCSAT_ICNT) |
1735 AR5K_REG_SM(12, AR5K_PHY_ADCSAT_THR), AR5K_PHY_ADCSAT);
1739 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1741 ath5k_hw_reg_write(ah, AR5K_PHY_RFSTG_DISABLE, AR5K_PHY_RFSTG);
1742 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1744 usleep_range(1000, 1500);
1747 * Enable calibration and wait until completion
1749 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_CAL);
1751 ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
1752 AR5K_PHY_AGCCTL_CAL, 0, false);
1754 /* Reset to normal state */
1755 ath5k_hw_reg_write(ah, phy_sig, AR5K_PHY_SIG);
1756 ath5k_hw_reg_write(ah, phy_agc, AR5K_PHY_AGCCOARSE);
1757 ath5k_hw_reg_write(ah, phy_sat, AR5K_PHY_ADCSAT);
1760 ATH5K_ERR(ah, "calibration timeout (%uMHz)\n",
1761 channel->center_freq);
1766 * Re-enable RX/TX and beacons
1768 AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW_5210,
1769 AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210);
1770 ath5k_hw_reg_write(ah, beacon, AR5K_BEACON_5210);
1776 * ath5k_hw_rf511x_iq_calibrate() - Perform I/Q calibration on RF5111 and newer
1777 * @ah: The &struct ath5k_hw
1780 ath5k_hw_rf511x_iq_calibrate(struct ath5k_hw *ah)
1783 s32 iq_corr, i_coff, i_coffd, q_coff, q_coffd;
1786 /* Skip if I/Q calibration is not needed or if it's still running */
1787 if (!ah->ah_iq_cal_needed)
1789 else if (ath5k_hw_reg_read(ah, AR5K_PHY_IQ) & AR5K_PHY_IQ_RUN) {
1790 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1791 "I/Q calibration still running");
1795 /* Calibration has finished, get the results and re-run */
1797 /* Work around for empty results which can apparently happen on 5212:
1798 * Read registers up to 10 times until we get both i_pr and q_pwr */
1799 for (i = 0; i <= 10; i++) {
1800 iq_corr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_CORR);
1801 i_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_I);
1802 q_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_Q);
1803 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1804 "iq_corr:%x i_pwr:%x q_pwr:%x", iq_corr, i_pwr, q_pwr);
1809 i_coffd = ((i_pwr >> 1) + (q_pwr >> 1)) >> 7;
1811 if (ah->ah_version == AR5K_AR5211)
1812 q_coffd = q_pwr >> 6;
1814 q_coffd = q_pwr >> 7;
1816 /* In case i_coffd became zero, cancel calibration
1817 * not only it's too small, it'll also result a divide
1818 * by zero later on. */
1819 if (i_coffd == 0 || q_coffd < 2)
1822 /* Protect against loss of sign bits */
1824 i_coff = (-iq_corr) / i_coffd;
1825 i_coff = clamp(i_coff, -32, 31); /* signed 6 bit */
1827 if (ah->ah_version == AR5K_AR5211)
1828 q_coff = (i_pwr / q_coffd) - 64;
1830 q_coff = (i_pwr / q_coffd) - 128;
1831 q_coff = clamp(q_coff, -16, 15); /* signed 5 bit */
1833 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1834 "new I:%d Q:%d (i_coffd:%x q_coffd:%x)",
1835 i_coff, q_coff, i_coffd, q_coffd);
1837 /* Commit new I/Q values (set enable bit last to match HAL sources) */
1838 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF, i_coff);
1839 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF, q_coff);
1840 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE);
1842 /* Re-enable calibration -if we don't we'll commit
1843 * the same values again and again */
1844 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
1845 AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
1846 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_RUN);
1852 * ath5k_hw_phy_calibrate() - Perform a PHY calibration
1853 * @ah: The &struct ath5k_hw
1854 * @channel: The &struct ieee80211_channel
1856 * The main function we call from above to perform
1857 * a short or full PHY calibration based on RF chip
1858 * and current channel
1861 ath5k_hw_phy_calibrate(struct ath5k_hw *ah,
1862 struct ieee80211_channel *channel)
1866 if (ah->ah_radio == AR5K_RF5110)
1867 return ath5k_hw_rf5110_calibrate(ah, channel);
1869 ret = ath5k_hw_rf511x_iq_calibrate(ah);
1871 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1872 "No I/Q correction performed (%uMHz)\n",
1873 channel->center_freq);
1875 /* Happens all the time if there is not much
1876 * traffic, consider it normal behaviour. */
1880 /* On full calibration request a PAPD probe for
1881 * gainf calibration if needed */
1882 if ((ah->ah_cal_mask & AR5K_CALIBRATION_FULL) &&
1883 (ah->ah_radio == AR5K_RF5111 ||
1884 ah->ah_radio == AR5K_RF5112) &&
1885 channel->hw_value != AR5K_MODE_11B)
1886 ath5k_hw_request_rfgain_probe(ah);
1888 /* Update noise floor */
1889 if (!(ah->ah_cal_mask & AR5K_CALIBRATION_NF))
1890 ath5k_hw_update_noise_floor(ah);
1896 /***************************\
1897 * Spur mitigation functions *
1898 \***************************/
1901 * ath5k_hw_set_spur_mitigation_filter() - Configure SPUR filter
1902 * @ah: The &struct ath5k_hw
1903 * @channel: The &struct ieee80211_channel
1905 * This function gets called during PHY initialization to
1906 * configure the spur filter for the given channel. Spur is noise
1907 * generated due to "reflection" effects, for more information on this
1908 * method check out patent US7643810
1911 ath5k_hw_set_spur_mitigation_filter(struct ath5k_hw *ah,
1912 struct ieee80211_channel *channel)
1914 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1915 u32 mag_mask[4] = {0, 0, 0, 0};
1916 u32 pilot_mask[2] = {0, 0};
1917 /* Note: fbin values are scaled up by 2 */
1918 u16 spur_chan_fbin, chan_fbin, symbol_width, spur_detection_window;
1919 s32 spur_delta_phase, spur_freq_sigma_delta;
1920 s32 spur_offset, num_symbols_x16;
1921 u8 num_symbol_offsets, i, freq_band;
1923 /* Convert current frequency to fbin value (the same way channels
1924 * are stored on EEPROM, check out ath5k_eeprom_bin2freq) and scale
1925 * up by 2 so we can compare it later */
1926 if (channel->band == IEEE80211_BAND_2GHZ) {
1927 chan_fbin = (channel->center_freq - 2300) * 10;
1928 freq_band = AR5K_EEPROM_BAND_2GHZ;
1930 chan_fbin = (channel->center_freq - 4900) * 10;
1931 freq_band = AR5K_EEPROM_BAND_5GHZ;
1934 /* Check if any spur_chan_fbin from EEPROM is
1935 * within our current channel's spur detection range */
1936 spur_chan_fbin = AR5K_EEPROM_NO_SPUR;
1937 spur_detection_window = AR5K_SPUR_CHAN_WIDTH;
1938 /* XXX: Half/Quarter channels ?*/
1939 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
1940 spur_detection_window *= 2;
1942 for (i = 0; i < AR5K_EEPROM_N_SPUR_CHANS; i++) {
1943 spur_chan_fbin = ee->ee_spur_chans[i][freq_band];
1945 /* Note: mask cleans AR5K_EEPROM_NO_SPUR flag
1946 * so it's zero if we got nothing from EEPROM */
1947 if (spur_chan_fbin == AR5K_EEPROM_NO_SPUR) {
1948 spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK;
1952 if ((chan_fbin - spur_detection_window <=
1953 (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK)) &&
1954 (chan_fbin + spur_detection_window >=
1955 (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK))) {
1956 spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK;
1961 /* We need to enable spur filter for this channel */
1962 if (spur_chan_fbin) {
1963 spur_offset = spur_chan_fbin - chan_fbin;
1966 * spur_freq_sigma_delta -> spur_offset / sample_freq << 21
1967 * spur_delta_phase -> spur_offset / chip_freq << 11
1968 * Note: Both values have 100Hz resolution
1970 switch (ah->ah_bwmode) {
1971 case AR5K_BWMODE_40MHZ:
1972 /* Both sample_freq and chip_freq are 80MHz */
1973 spur_delta_phase = (spur_offset << 16) / 25;
1974 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1975 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz * 2;
1977 case AR5K_BWMODE_10MHZ:
1978 /* Both sample_freq and chip_freq are 20MHz (?) */
1979 spur_delta_phase = (spur_offset << 18) / 25;
1980 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1981 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 2;
1983 case AR5K_BWMODE_5MHZ:
1984 /* Both sample_freq and chip_freq are 10MHz (?) */
1985 spur_delta_phase = (spur_offset << 19) / 25;
1986 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1987 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 4;
1990 if (channel->band == IEEE80211_BAND_5GHZ) {
1991 /* Both sample_freq and chip_freq are 40MHz */
1992 spur_delta_phase = (spur_offset << 17) / 25;
1993 spur_freq_sigma_delta =
1994 (spur_delta_phase >> 10);
1996 AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz;
1998 /* sample_freq -> 40MHz chip_freq -> 44MHz
1999 * (for b compatibility) */
2000 spur_delta_phase = (spur_offset << 17) / 25;
2001 spur_freq_sigma_delta =
2002 (spur_offset << 8) / 55;
2004 AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz;
2009 /* Calculate pilot and magnitude masks */
2011 /* Scale up spur_offset by 1000 to switch to 100HZ resolution
2012 * and divide by symbol_width to find how many symbols we have
2013 * Note: number of symbols is scaled up by 16 */
2014 num_symbols_x16 = ((spur_offset * 1000) << 4) / symbol_width;
2016 /* Spur is on a symbol if num_symbols_x16 % 16 is zero */
2017 if (!(num_symbols_x16 & 0xF))
2019 num_symbol_offsets = 3;
2022 num_symbol_offsets = 4;
2024 for (i = 0; i < num_symbol_offsets; i++) {
2026 /* Calculate pilot mask */
2028 (num_symbols_x16 / 16) + i + 25;
2030 /* Pilot magnitude mask seems to be a way to
2031 * declare the boundaries for our detection
2032 * window or something, it's 2 for the middle
2033 * value(s) where the symbol is expected to be
2034 * and 1 on the boundary values */
2036 (i == 0 || i == (num_symbol_offsets - 1))
2039 if (curr_sym_off >= 0 && curr_sym_off <= 32) {
2040 if (curr_sym_off <= 25)
2041 pilot_mask[0] |= 1 << curr_sym_off;
2042 else if (curr_sym_off >= 27)
2043 pilot_mask[0] |= 1 << (curr_sym_off - 1);
2044 } else if (curr_sym_off >= 33 && curr_sym_off <= 52)
2045 pilot_mask[1] |= 1 << (curr_sym_off - 33);
2047 /* Calculate magnitude mask (for viterbi decoder) */
2048 if (curr_sym_off >= -1 && curr_sym_off <= 14)
2050 plt_mag_map << (curr_sym_off + 1) * 2;
2051 else if (curr_sym_off >= 15 && curr_sym_off <= 30)
2053 plt_mag_map << (curr_sym_off - 15) * 2;
2054 else if (curr_sym_off >= 31 && curr_sym_off <= 46)
2056 plt_mag_map << (curr_sym_off - 31) * 2;
2057 else if (curr_sym_off >= 47 && curr_sym_off <= 53)
2059 plt_mag_map << (curr_sym_off - 47) * 2;
2063 /* Write settings on hw to enable spur filter */
2064 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
2065 AR5K_PHY_BIN_MASK_CTL_RATE, 0xff);
2066 /* XXX: Self correlator also ? */
2067 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
2068 AR5K_PHY_IQ_PILOT_MASK_EN |
2069 AR5K_PHY_IQ_CHAN_MASK_EN |
2070 AR5K_PHY_IQ_SPUR_FILT_EN);
2072 /* Set delta phase and freq sigma delta */
2073 ath5k_hw_reg_write(ah,
2074 AR5K_REG_SM(spur_delta_phase,
2075 AR5K_PHY_TIMING_11_SPUR_DELTA_PHASE) |
2076 AR5K_REG_SM(spur_freq_sigma_delta,
2077 AR5K_PHY_TIMING_11_SPUR_FREQ_SD) |
2078 AR5K_PHY_TIMING_11_USE_SPUR_IN_AGC,
2079 AR5K_PHY_TIMING_11);
2081 /* Write pilot masks */
2082 ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_7);
2083 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8,
2084 AR5K_PHY_TIMING_8_PILOT_MASK_2,
2087 ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_9);
2088 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10,
2089 AR5K_PHY_TIMING_10_PILOT_MASK_2,
2092 /* Write magnitude masks */
2093 ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK_1);
2094 ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK_2);
2095 ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK_3);
2096 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
2097 AR5K_PHY_BIN_MASK_CTL_MASK_4,
2100 ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK2_1);
2101 ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK2_2);
2102 ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK2_3);
2103 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4,
2104 AR5K_PHY_BIN_MASK2_4_MASK_4,
2107 } else if (ath5k_hw_reg_read(ah, AR5K_PHY_IQ) &
2108 AR5K_PHY_IQ_SPUR_FILT_EN) {
2109 /* Clean up spur mitigation settings and disable filter */
2110 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
2111 AR5K_PHY_BIN_MASK_CTL_RATE, 0);
2112 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_IQ,
2113 AR5K_PHY_IQ_PILOT_MASK_EN |
2114 AR5K_PHY_IQ_CHAN_MASK_EN |
2115 AR5K_PHY_IQ_SPUR_FILT_EN);
2116 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_11);
2118 /* Clear pilot masks */
2119 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_7);
2120 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8,
2121 AR5K_PHY_TIMING_8_PILOT_MASK_2,
2124 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_9);
2125 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10,
2126 AR5K_PHY_TIMING_10_PILOT_MASK_2,
2129 /* Clear magnitude masks */
2130 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_1);
2131 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_2);
2132 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_3);
2133 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
2134 AR5K_PHY_BIN_MASK_CTL_MASK_4,
2137 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_1);
2138 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_2);
2139 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_3);
2140 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4,
2141 AR5K_PHY_BIN_MASK2_4_MASK_4,
2152 * DOC: Antenna control
2154 * Hw supports up to 14 antennas ! I haven't found any card that implements
2155 * that. The maximum number of antennas I've seen is up to 4 (2 for 2GHz and 2
2156 * for 5GHz). Antenna 1 (MAIN) should be omnidirectional, 2 (AUX)
2157 * omnidirectional or sectorial and antennas 3-14 sectorial (or directional).
2159 * We can have a single antenna for RX and multiple antennas for TX.
2160 * RX antenna is our "default" antenna (usually antenna 1) set on
2161 * DEFAULT_ANTENNA register and TX antenna is set on each TX control descriptor
2162 * (0 for automatic selection, 1 - 14 antenna number).
2164 * We can let hw do all the work doing fast antenna diversity for both
2165 * tx and rx or we can do things manually. Here are the options we have
2166 * (all are bits of STA_ID1 register):
2168 * AR5K_STA_ID1_DEFAULT_ANTENNA -> When 0 is set as the TX antenna on TX
2169 * control descriptor, use the default antenna to transmit or else use the last
2170 * antenna on which we received an ACK.
2172 * AR5K_STA_ID1_DESC_ANTENNA -> Update default antenna after each TX frame to
2173 * the antenna on which we got the ACK for that frame.
2175 * AR5K_STA_ID1_RTS_DEF_ANTENNA -> Use default antenna for RTS or else use the
2176 * one on the TX descriptor.
2178 * AR5K_STA_ID1_SELFGEN_DEF_ANT -> Use default antenna for self generated frames
2179 * (ACKs etc), or else use current antenna (the one we just used for TX).
2181 * Using the above we support the following scenarios:
2183 * AR5K_ANTMODE_DEFAULT -> Hw handles antenna diversity etc automatically
2185 * AR5K_ANTMODE_FIXED_A -> Only antenna A (MAIN) is present
2187 * AR5K_ANTMODE_FIXED_B -> Only antenna B (AUX) is present
2189 * AR5K_ANTMODE_SINGLE_AP -> Sta locked on a single ap
2191 * AR5K_ANTMODE_SECTOR_AP -> AP with tx antenna set on tx desc
2193 * AR5K_ANTMODE_SECTOR_STA -> STA with tx antenna set on tx desc
2195 * AR5K_ANTMODE_DEBUG Debug mode -A -> Rx, B-> Tx-
2197 * Also note that when setting antenna to F on tx descriptor card inverts
2198 * current tx antenna.
2202 * ath5k_hw_set_def_antenna() - Set default rx antenna on AR5211/5212 and newer
2203 * @ah: The &struct ath5k_hw
2204 * @ant: Antenna number
2207 ath5k_hw_set_def_antenna(struct ath5k_hw *ah, u8 ant)
2209 if (ah->ah_version != AR5K_AR5210)
2210 ath5k_hw_reg_write(ah, ant & 0x7, AR5K_DEFAULT_ANTENNA);
2214 * ath5k_hw_set_fast_div() - Enable/disable fast rx antenna diversity
2215 * @ah: The &struct ath5k_hw
2216 * @ee_mode: One of enum ath5k_driver_mode
2217 * @enable: True to enable, false to disable
2220 ath5k_hw_set_fast_div(struct ath5k_hw *ah, u8 ee_mode, bool enable)
2223 case AR5K_EEPROM_MODE_11G:
2224 /* XXX: This is set to
2225 * disabled on initvals !!! */
2226 case AR5K_EEPROM_MODE_11A:
2228 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGCCTL,
2229 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
2231 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
2232 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
2234 case AR5K_EEPROM_MODE_11B:
2235 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
2236 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
2243 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
2244 AR5K_PHY_RESTART_DIV_GC, 4);
2246 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
2247 AR5K_PHY_FAST_ANT_DIV_EN);
2249 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
2250 AR5K_PHY_RESTART_DIV_GC, 0);
2252 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
2253 AR5K_PHY_FAST_ANT_DIV_EN);
2258 * ath5k_hw_set_antenna_switch() - Set up antenna switch table
2259 * @ah: The &struct ath5k_hw
2260 * @ee_mode: One of enum ath5k_driver_mode
2262 * Switch table comes from EEPROM and includes information on controlling
2263 * the 2 antenna RX attenuators
2266 ath5k_hw_set_antenna_switch(struct ath5k_hw *ah, u8 ee_mode)
2271 * In case a fixed antenna was set as default
2272 * use the same switch table twice.
2274 if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_A)
2275 ant0 = ant1 = AR5K_ANT_SWTABLE_A;
2276 else if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_B)
2277 ant0 = ant1 = AR5K_ANT_SWTABLE_B;
2279 ant0 = AR5K_ANT_SWTABLE_A;
2280 ant1 = AR5K_ANT_SWTABLE_B;
2283 /* Set antenna idle switch table */
2284 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_ANT_CTL,
2285 AR5K_PHY_ANT_CTL_SWTABLE_IDLE,
2286 (ah->ah_ant_ctl[ee_mode][AR5K_ANT_CTL] |
2287 AR5K_PHY_ANT_CTL_TXRX_EN));
2289 /* Set antenna switch tables */
2290 ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant0],
2291 AR5K_PHY_ANT_SWITCH_TABLE_0);
2292 ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant1],
2293 AR5K_PHY_ANT_SWITCH_TABLE_1);
2297 * ath5k_hw_set_antenna_mode() - Set antenna operating mode
2298 * @ah: The &struct ath5k_hw
2299 * @ant_mode: One of enum ath5k_ant_mode
2302 ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode)
2304 struct ieee80211_channel *channel = ah->ah_current_channel;
2305 bool use_def_for_tx, update_def_on_tx, use_def_for_rts, fast_div;
2306 bool use_def_for_sg;
2311 /* if channel is not initialized yet we can't set the antennas
2312 * so just store the mode. it will be set on the next reset */
2313 if (channel == NULL) {
2314 ah->ah_ant_mode = ant_mode;
2318 def_ant = ah->ah_def_ant;
2320 ee_mode = ath5k_eeprom_mode_from_channel(channel);
2323 "invalid channel: %d\n", channel->center_freq);
2328 case AR5K_ANTMODE_DEFAULT:
2330 use_def_for_tx = false;
2331 update_def_on_tx = false;
2332 use_def_for_rts = false;
2333 use_def_for_sg = false;
2336 case AR5K_ANTMODE_FIXED_A:
2339 use_def_for_tx = true;
2340 update_def_on_tx = false;
2341 use_def_for_rts = true;
2342 use_def_for_sg = true;
2345 case AR5K_ANTMODE_FIXED_B:
2348 use_def_for_tx = true;
2349 update_def_on_tx = false;
2350 use_def_for_rts = true;
2351 use_def_for_sg = true;
2354 case AR5K_ANTMODE_SINGLE_AP:
2355 def_ant = 1; /* updated on tx */
2357 use_def_for_tx = true;
2358 update_def_on_tx = true;
2359 use_def_for_rts = true;
2360 use_def_for_sg = true;
2363 case AR5K_ANTMODE_SECTOR_AP:
2364 tx_ant = 1; /* variable */
2365 use_def_for_tx = false;
2366 update_def_on_tx = false;
2367 use_def_for_rts = true;
2368 use_def_for_sg = false;
2371 case AR5K_ANTMODE_SECTOR_STA:
2372 tx_ant = 1; /* variable */
2373 use_def_for_tx = true;
2374 update_def_on_tx = false;
2375 use_def_for_rts = true;
2376 use_def_for_sg = false;
2379 case AR5K_ANTMODE_DEBUG:
2382 use_def_for_tx = false;
2383 update_def_on_tx = false;
2384 use_def_for_rts = false;
2385 use_def_for_sg = false;
2392 ah->ah_tx_ant = tx_ant;
2393 ah->ah_ant_mode = ant_mode;
2394 ah->ah_def_ant = def_ant;
2396 sta_id1 |= use_def_for_tx ? AR5K_STA_ID1_DEFAULT_ANTENNA : 0;
2397 sta_id1 |= update_def_on_tx ? AR5K_STA_ID1_DESC_ANTENNA : 0;
2398 sta_id1 |= use_def_for_rts ? AR5K_STA_ID1_RTS_DEF_ANTENNA : 0;
2399 sta_id1 |= use_def_for_sg ? AR5K_STA_ID1_SELFGEN_DEF_ANT : 0;
2401 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_ANTENNA_SETTINGS);
2404 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1, sta_id1);
2406 ath5k_hw_set_antenna_switch(ah, ee_mode);
2407 /* Note: set diversity before default antenna
2408 * because it won't work correctly */
2409 ath5k_hw_set_fast_div(ah, ee_mode, fast_div);
2410 ath5k_hw_set_def_antenna(ah, def_ant);
2423 * ath5k_get_interpolated_value() - Get interpolated Y val between two points
2424 * @target: X value of the middle point
2425 * @x_left: X value of the left point
2426 * @x_right: X value of the right point
2427 * @y_left: Y value of the left point
2428 * @y_right: Y value of the right point
2431 ath5k_get_interpolated_value(s16 target, s16 x_left, s16 x_right,
2432 s16 y_left, s16 y_right)
2436 /* Avoid divide by zero and skip interpolation
2437 * if we have the same point */
2438 if ((x_left == x_right) || (y_left == y_right))
2442 * Since we use ints and not fps, we need to scale up in
2443 * order to get a sane ratio value (or else we 'll eg. get
2444 * always 1 instead of 1.25, 1.75 etc). We scale up by 100
2445 * to have some accuracy both for 0.5 and 0.25 steps.
2447 ratio = ((100 * y_right - 100 * y_left) / (x_right - x_left));
2449 /* Now scale down to be in range */
2450 result = y_left + (ratio * (target - x_left) / 100);
2456 * ath5k_get_linear_pcdac_min() - Find vertical boundary (min pwr) for the
2457 * linear PCDAC curve
2458 * @stepL: Left array with y values (pcdac steps)
2459 * @stepR: Right array with y values (pcdac steps)
2460 * @pwrL: Left array with x values (power steps)
2461 * @pwrR: Right array with x values (power steps)
2463 * Since we have the top of the curve and we draw the line below
2464 * until we reach 1 (1 pcdac step) we need to know which point
2465 * (x value) that is so that we don't go below x axis and have negative
2466 * pcdac values when creating the curve, or fill the table with zeros.
2469 ath5k_get_linear_pcdac_min(const u8 *stepL, const u8 *stepR,
2470 const s16 *pwrL, const s16 *pwrR)
2473 s16 min_pwrL, min_pwrR;
2476 /* Some vendors write the same pcdac value twice !!! */
2477 if (stepL[0] == stepL[1] || stepR[0] == stepR[1])
2478 return max(pwrL[0], pwrR[0]);
2480 if (pwrL[0] == pwrL[1])
2486 tmp = (s8) ath5k_get_interpolated_value(pwr_i,
2488 stepL[0], stepL[1]);
2494 if (pwrR[0] == pwrR[1])
2500 tmp = (s8) ath5k_get_interpolated_value(pwr_i,
2502 stepR[0], stepR[1]);
2508 /* Keep the right boundary so that it works for both curves */
2509 return max(min_pwrL, min_pwrR);
2513 * ath5k_create_power_curve() - Create a Power to PDADC or PCDAC curve
2514 * @pmin: Minimum power value (xmin)
2515 * @pmax: Maximum power value (xmax)
2516 * @pwr: Array of power steps (x values)
2517 * @vpd: Array of matching PCDAC/PDADC steps (y values)
2518 * @num_points: Number of provided points
2519 * @vpd_table: Array to fill with the full PCDAC/PDADC values (y values)
2520 * @type: One of enum ath5k_powertable_type (eeprom.h)
2522 * Interpolate (pwr,vpd) points to create a Power to PDADC or a
2523 * Power to PCDAC curve.
2525 * Each curve has power on x axis (in 0.5dB units) and PCDAC/PDADC
2526 * steps (offsets) on y axis. Power can go up to 31.5dB and max
2527 * PCDAC/PDADC step for each curve is 64 but we can write more than
2528 * one curves on hw so we can go up to 128 (which is the max step we
2529 * can write on the final table).
2531 * We write y values (PCDAC/PDADC steps) on hw.
2534 ath5k_create_power_curve(s16 pmin, s16 pmax,
2535 const s16 *pwr, const u8 *vpd,
2537 u8 *vpd_table, u8 type)
2539 u8 idx[2] = { 0, 1 };
2540 s16 pwr_i = 2 * pmin;
2546 /* We want the whole line, so adjust boundaries
2547 * to cover the entire power range. Note that
2548 * power values are already 0.25dB so no need
2549 * to multiply pwr_i by 2 */
2550 if (type == AR5K_PWRTABLE_LINEAR_PCDAC) {
2556 /* Find surrounding turning points (TPs)
2557 * and interpolate between them */
2558 for (i = 0; (i <= (u16) (pmax - pmin)) &&
2559 (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) {
2561 /* We passed the right TP, move to the next set of TPs
2562 * if we pass the last TP, extrapolate above using the last
2563 * two TPs for ratio */
2564 if ((pwr_i > pwr[idx[1]]) && (idx[1] < num_points - 1)) {
2569 vpd_table[i] = (u8) ath5k_get_interpolated_value(pwr_i,
2570 pwr[idx[0]], pwr[idx[1]],
2571 vpd[idx[0]], vpd[idx[1]]);
2573 /* Increase by 0.5dB
2574 * (0.25 dB units) */
2580 * ath5k_get_chan_pcal_surrounding_piers() - Get surrounding calibration piers
2581 * for a given channel.
2582 * @ah: The &struct ath5k_hw
2583 * @channel: The &struct ieee80211_channel
2584 * @pcinfo_l: The &struct ath5k_chan_pcal_info to put the left cal. pier
2585 * @pcinfo_r: The &struct ath5k_chan_pcal_info to put the right cal. pier
2587 * Get the surrounding per-channel power calibration piers
2588 * for a given frequency so that we can interpolate between
2589 * them and come up with an appropriate dataset for our current
2593 ath5k_get_chan_pcal_surrounding_piers(struct ath5k_hw *ah,
2594 struct ieee80211_channel *channel,
2595 struct ath5k_chan_pcal_info **pcinfo_l,
2596 struct ath5k_chan_pcal_info **pcinfo_r)
2598 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2599 struct ath5k_chan_pcal_info *pcinfo;
2602 u32 target = channel->center_freq;
2607 switch (channel->hw_value) {
2608 case AR5K_EEPROM_MODE_11A:
2609 pcinfo = ee->ee_pwr_cal_a;
2610 mode = AR5K_EEPROM_MODE_11A;
2612 case AR5K_EEPROM_MODE_11B:
2613 pcinfo = ee->ee_pwr_cal_b;
2614 mode = AR5K_EEPROM_MODE_11B;
2616 case AR5K_EEPROM_MODE_11G:
2618 pcinfo = ee->ee_pwr_cal_g;
2619 mode = AR5K_EEPROM_MODE_11G;
2622 max = ee->ee_n_piers[mode] - 1;
2624 /* Frequency is below our calibrated
2625 * range. Use the lowest power curve
2627 if (target < pcinfo[0].freq) {
2632 /* Frequency is above our calibrated
2633 * range. Use the highest power curve
2635 if (target > pcinfo[max].freq) {
2636 idx_l = idx_r = max;
2640 /* Frequency is inside our calibrated
2641 * channel range. Pick the surrounding
2642 * calibration piers so that we can
2644 for (i = 0; i <= max; i++) {
2646 /* Frequency matches one of our calibration
2647 * piers, no need to interpolate, just use
2648 * that calibration pier */
2649 if (pcinfo[i].freq == target) {
2654 /* We found a calibration pier that's above
2655 * frequency, use this pier and the previous
2656 * one to interpolate */
2657 if (target < pcinfo[i].freq) {
2665 *pcinfo_l = &pcinfo[idx_l];
2666 *pcinfo_r = &pcinfo[idx_r];
2670 * ath5k_get_rate_pcal_data() - Get the interpolated per-rate power
2672 * @ah: The &struct ath5k_hw *ah,
2673 * @channel: The &struct ieee80211_channel
2674 * @rates: The &struct ath5k_rate_pcal_info to fill
2676 * Get the surrounding per-rate power calibration data
2677 * for a given frequency and interpolate between power
2678 * values to set max target power supported by hw for
2679 * each rate on this frequency.
2682 ath5k_get_rate_pcal_data(struct ath5k_hw *ah,
2683 struct ieee80211_channel *channel,
2684 struct ath5k_rate_pcal_info *rates)
2686 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2687 struct ath5k_rate_pcal_info *rpinfo;
2690 u32 target = channel->center_freq;
2695 switch (channel->hw_value) {
2697 rpinfo = ee->ee_rate_tpwr_a;
2698 mode = AR5K_EEPROM_MODE_11A;
2701 rpinfo = ee->ee_rate_tpwr_b;
2702 mode = AR5K_EEPROM_MODE_11B;
2706 rpinfo = ee->ee_rate_tpwr_g;
2707 mode = AR5K_EEPROM_MODE_11G;
2710 max = ee->ee_rate_target_pwr_num[mode] - 1;
2712 /* Get the surrounding calibration
2713 * piers - same as above */
2714 if (target < rpinfo[0].freq) {
2719 if (target > rpinfo[max].freq) {
2720 idx_l = idx_r = max;
2724 for (i = 0; i <= max; i++) {
2726 if (rpinfo[i].freq == target) {
2731 if (target < rpinfo[i].freq) {
2739 /* Now interpolate power value, based on the frequency */
2740 rates->freq = target;
2742 rates->target_power_6to24 =
2743 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2745 rpinfo[idx_l].target_power_6to24,
2746 rpinfo[idx_r].target_power_6to24);
2748 rates->target_power_36 =
2749 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2751 rpinfo[idx_l].target_power_36,
2752 rpinfo[idx_r].target_power_36);
2754 rates->target_power_48 =
2755 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2757 rpinfo[idx_l].target_power_48,
2758 rpinfo[idx_r].target_power_48);
2760 rates->target_power_54 =
2761 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2763 rpinfo[idx_l].target_power_54,
2764 rpinfo[idx_r].target_power_54);
2768 * ath5k_get_max_ctl_power() - Get max edge power for a given frequency
2769 * @ah: the &struct ath5k_hw
2770 * @channel: The &struct ieee80211_channel
2772 * Get the max edge power for this channel if
2773 * we have such data from EEPROM's Conformance Test
2774 * Limits (CTL), and limit max power if needed.
2777 ath5k_get_max_ctl_power(struct ath5k_hw *ah,
2778 struct ieee80211_channel *channel)
2780 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
2781 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2782 struct ath5k_edge_power *rep = ee->ee_ctl_pwr;
2783 u8 *ctl_val = ee->ee_ctl;
2784 s16 max_chan_pwr = ah->ah_txpower.txp_max_pwr / 4;
2789 u32 target = channel->center_freq;
2791 ctl_mode = ath_regd_get_band_ctl(regulatory, channel->band);
2793 switch (channel->hw_value) {
2795 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
2796 ctl_mode |= AR5K_CTL_TURBO;
2798 ctl_mode |= AR5K_CTL_11A;
2801 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
2802 ctl_mode |= AR5K_CTL_TURBOG;
2804 ctl_mode |= AR5K_CTL_11G;
2807 ctl_mode |= AR5K_CTL_11B;
2813 for (i = 0; i < ee->ee_ctls; i++) {
2814 if (ctl_val[i] == ctl_mode) {
2820 /* If we have a CTL dataset available grab it and find the
2821 * edge power for our frequency */
2822 if (ctl_idx == 0xFF)
2825 /* Edge powers are sorted by frequency from lower
2826 * to higher. Each CTL corresponds to 8 edge power
2828 rep_idx = ctl_idx * AR5K_EEPROM_N_EDGES;
2830 /* Don't do boundaries check because we
2831 * might have more that one bands defined
2834 /* Get the edge power that's closer to our
2836 for (i = 0; i < AR5K_EEPROM_N_EDGES; i++) {
2838 if (target <= rep[rep_idx].freq)
2839 edge_pwr = (s16) rep[rep_idx].edge;
2843 ah->ah_txpower.txp_max_pwr = 4 * min(edge_pwr, max_chan_pwr);
2848 * Power to PCDAC table functions
2852 * DOC: Power to PCDAC table functions
2854 * For RF5111 we have an XPD -eXternal Power Detector- curve
2855 * for each calibrated channel. Each curve has 0,5dB Power steps
2856 * on x axis and PCDAC steps (offsets) on y axis and looks like an
2857 * exponential function. To recreate the curve we read 11 points
2858 * from eeprom (eeprom.c) and interpolate here.
2860 * For RF5112 we have 4 XPD -eXternal Power Detector- curves
2861 * for each calibrated channel on 0, -6, -12 and -18dBm but we only
2862 * use the higher (3) and the lower (0) curves. Each curve again has 0.5dB
2863 * power steps on x axis and PCDAC steps on y axis and looks like a
2864 * linear function. To recreate the curve and pass the power values
2865 * on hw, we get 4 points for xpd 0 (lower gain -> max power)
2866 * and 3 points for xpd 3 (higher gain -> lower power) from eeprom (eeprom.c)
2867 * and interpolate here.
2869 * For a given channel we get the calibrated points (piers) for it or
2870 * -if we don't have calibration data for this specific channel- from the
2871 * available surrounding channels we have calibration data for, after we do a
2872 * linear interpolation between them. Then since we have our calibrated points
2873 * for this channel, we do again a linear interpolation between them to get the
2876 * We finally write the Y values of the curve(s) (the PCDAC values) on hw
2880 * ath5k_fill_pwr_to_pcdac_table() - Fill Power to PCDAC table on RF5111
2881 * @ah: The &struct ath5k_hw
2882 * @table_min: Minimum power (x min)
2883 * @table_max: Maximum power (x max)
2885 * No further processing is needed for RF5111, the only thing we have to
2886 * do is fill the values below and above calibration range since eeprom data
2887 * may not cover the entire PCDAC table.
2890 ath5k_fill_pwr_to_pcdac_table(struct ath5k_hw *ah, s16* table_min,
2893 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2894 u8 *pcdac_tmp = ah->ah_txpower.tmpL[0];
2895 u8 pcdac_0, pcdac_n, pcdac_i, pwr_idx, i;
2896 s16 min_pwr, max_pwr;
2898 /* Get table boundaries */
2899 min_pwr = table_min[0];
2900 pcdac_0 = pcdac_tmp[0];
2902 max_pwr = table_max[0];
2903 pcdac_n = pcdac_tmp[table_max[0] - table_min[0]];
2905 /* Extrapolate below minimum using pcdac_0 */
2907 for (i = 0; i < min_pwr; i++)
2908 pcdac_out[pcdac_i++] = pcdac_0;
2910 /* Copy values from pcdac_tmp */
2912 for (i = 0; pwr_idx <= max_pwr &&
2913 pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE; i++) {
2914 pcdac_out[pcdac_i++] = pcdac_tmp[i];
2918 /* Extrapolate above maximum */
2919 while (pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE)
2920 pcdac_out[pcdac_i++] = pcdac_n;
2925 * ath5k_combine_linear_pcdac_curves() - Combine available PCDAC Curves
2926 * @ah: The &struct ath5k_hw
2927 * @table_min: Minimum power (x min)
2928 * @table_max: Maximum power (x max)
2929 * @pdcurves: Number of pd curves
2931 * Combine available XPD Curves and fill Linear Power to PCDAC table on RF5112
2932 * RFX112 can have up to 2 curves (one for low txpower range and one for
2933 * higher txpower range). We need to put them both on pcdac_out and place
2934 * them in the correct location. In case we only have one curve available
2935 * just fit it on pcdac_out (it's supposed to cover the entire range of
2936 * available pwr levels since it's always the higher power curve). Extrapolate
2937 * below and above final table if needed.
2940 ath5k_combine_linear_pcdac_curves(struct ath5k_hw *ah, s16* table_min,
2941 s16 *table_max, u8 pdcurves)
2943 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2950 s16 mid_pwr_idx = 0;
2951 /* Edge flag turns on the 7nth bit on the PCDAC
2952 * to declare the higher power curve (force values
2953 * to be greater than 64). If we only have one curve
2954 * we don't need to set this, if we have 2 curves and
2955 * fill the table backwards this can also be used to
2956 * switch from higher power curve to lower power curve */
2960 /* When we have only one curve available
2961 * that's the higher power curve. If we have
2962 * two curves the first is the high power curve
2963 * and the next is the low power curve. */
2965 pcdac_low_pwr = ah->ah_txpower.tmpL[1];
2966 pcdac_high_pwr = ah->ah_txpower.tmpL[0];
2967 mid_pwr_idx = table_max[1] - table_min[1] - 1;
2968 max_pwr_idx = (table_max[0] - table_min[0]) / 2;
2970 /* If table size goes beyond 31.5dB, keep the
2971 * upper 31.5dB range when setting tx power.
2972 * Note: 126 = 31.5 dB in quarter dB steps */
2973 if (table_max[0] - table_min[1] > 126)
2974 min_pwr_idx = table_max[0] - 126;
2976 min_pwr_idx = table_min[1];
2978 /* Since we fill table backwards
2979 * start from high power curve */
2980 pcdac_tmp = pcdac_high_pwr;
2984 pcdac_low_pwr = ah->ah_txpower.tmpL[1]; /* Zeroed */
2985 pcdac_high_pwr = ah->ah_txpower.tmpL[0];
2986 min_pwr_idx = table_min[0];
2987 max_pwr_idx = (table_max[0] - table_min[0]) / 2;
2988 pcdac_tmp = pcdac_high_pwr;
2992 /* This is used when setting tx power*/
2993 ah->ah_txpower.txp_min_idx = min_pwr_idx / 2;
2995 /* Fill Power to PCDAC table backwards */
2997 for (i = 63; i >= 0; i--) {
2998 /* Entering lower power range, reset
2999 * edge flag and set pcdac_tmp to lower
3001 if (edge_flag == 0x40 &&
3002 (2 * pwr <= (table_max[1] - table_min[0]) || pwr == 0)) {
3004 pcdac_tmp = pcdac_low_pwr;
3005 pwr = mid_pwr_idx / 2;
3008 /* Don't go below 1, extrapolate below if we have
3009 * already switched to the lower power curve -or
3010 * we only have one curve and edge_flag is zero
3012 if (pcdac_tmp[pwr] < 1 && (edge_flag == 0x00)) {
3014 pcdac_out[i] = pcdac_out[i + 1];
3020 pcdac_out[i] = pcdac_tmp[pwr] | edge_flag;
3022 /* Extrapolate above if pcdac is greater than
3023 * 126 -this can happen because we OR pcdac_out
3024 * value with edge_flag on high power curve */
3025 if (pcdac_out[i] > 126)
3028 /* Decrease by a 0.5dB step */
3034 * ath5k_write_pcdac_table() - Write the PCDAC values on hw
3035 * @ah: The &struct ath5k_hw
3038 ath5k_write_pcdac_table(struct ath5k_hw *ah)
3040 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
3044 * Write TX power values
3046 for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
3047 ath5k_hw_reg_write(ah,
3048 (((pcdac_out[2 * i + 0] << 8 | 0xff) & 0xffff) << 0) |
3049 (((pcdac_out[2 * i + 1] << 8 | 0xff) & 0xffff) << 16),
3050 AR5K_PHY_PCDAC_TXPOWER(i));
3056 * Power to PDADC table functions
3060 * DOC: Power to PDADC table functions
3062 * For RF2413 and later we have a Power to PDADC table (Power Detector)
3063 * instead of a PCDAC (Power Control) and 4 pd gain curves for each
3064 * calibrated channel. Each curve has power on x axis in 0.5 db steps and
3065 * PDADC steps on y axis and looks like an exponential function like the
3068 * To recreate the curves we read the points from eeprom (eeprom.c)
3069 * and interpolate here. Note that in most cases only 2 (higher and lower)
3070 * curves are used (like RF5112) but vendors have the opportunity to include
3071 * all 4 curves on eeprom. The final curve (higher power) has an extra
3072 * point for better accuracy like RF5112.
3074 * The process is similar to what we do above for RF5111/5112
3078 * ath5k_combine_pwr_to_pdadc_curves() - Combine the various PDADC curves
3079 * @ah: The &struct ath5k_hw
3080 * @pwr_min: Minimum power (x min)
3081 * @pwr_max: Maximum power (x max)
3082 * @pdcurves: Number of available curves
3084 * Combine the various pd curves and create the final Power to PDADC table
3085 * We can have up to 4 pd curves, we need to do a similar process
3086 * as we do for RF5112. This time we don't have an edge_flag but we
3087 * set the gain boundaries on a separate register.
3090 ath5k_combine_pwr_to_pdadc_curves(struct ath5k_hw *ah,
3091 s16 *pwr_min, s16 *pwr_max, u8 pdcurves)
3093 u8 gain_boundaries[AR5K_EEPROM_N_PD_GAINS];
3094 u8 *pdadc_out = ah->ah_txpower.txp_pd_table;
3097 u8 pdadc_i, pdadc_n, pwr_step, pdg, max_idx, table_size;
3100 /* Note: Register value is initialized on initvals
3101 * there is no feedback from hw.
3102 * XXX: What about pd_gain_overlap from EEPROM ? */
3103 pd_gain_overlap = (u8) ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG5) &
3104 AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP;
3106 /* Create final PDADC table */
3107 for (pdg = 0, pdadc_i = 0; pdg < pdcurves; pdg++) {
3108 pdadc_tmp = ah->ah_txpower.tmpL[pdg];
3110 if (pdg == pdcurves - 1)
3111 /* 2 dB boundary stretch for last
3112 * (higher power) curve */
3113 gain_boundaries[pdg] = pwr_max[pdg] + 4;
3115 /* Set gain boundary in the middle
3116 * between this curve and the next one */
3117 gain_boundaries[pdg] =
3118 (pwr_max[pdg] + pwr_min[pdg + 1]) / 2;
3120 /* Sanity check in case our 2 db stretch got out of
3122 if (gain_boundaries[pdg] > AR5K_TUNE_MAX_TXPOWER)
3123 gain_boundaries[pdg] = AR5K_TUNE_MAX_TXPOWER;
3125 /* For the first curve (lower power)
3126 * start from 0 dB */
3130 /* For the other curves use the gain overlap */
3131 pdadc_0 = (gain_boundaries[pdg - 1] - pwr_min[pdg]) -
3134 /* Force each power step to be at least 0.5 dB */
3135 if ((pdadc_tmp[1] - pdadc_tmp[0]) > 1)
3136 pwr_step = pdadc_tmp[1] - pdadc_tmp[0];
3140 /* If pdadc_0 is negative, we need to extrapolate
3141 * below this pdgain by a number of pwr_steps */
3142 while ((pdadc_0 < 0) && (pdadc_i < 128)) {
3143 s16 tmp = pdadc_tmp[0] + pdadc_0 * pwr_step;
3144 pdadc_out[pdadc_i++] = (tmp < 0) ? 0 : (u8) tmp;
3148 /* Set last pwr level, using gain boundaries */
3149 pdadc_n = gain_boundaries[pdg] + pd_gain_overlap - pwr_min[pdg];
3150 /* Limit it to be inside pwr range */
3151 table_size = pwr_max[pdg] - pwr_min[pdg];
3152 max_idx = (pdadc_n < table_size) ? pdadc_n : table_size;
3154 /* Fill pdadc_out table */
3155 while (pdadc_0 < max_idx && pdadc_i < 128)
3156 pdadc_out[pdadc_i++] = pdadc_tmp[pdadc_0++];
3158 /* Need to extrapolate above this pdgain? */
3159 if (pdadc_n <= max_idx)
3162 /* Force each power step to be at least 0.5 dB */
3163 if ((pdadc_tmp[table_size - 1] - pdadc_tmp[table_size - 2]) > 1)
3164 pwr_step = pdadc_tmp[table_size - 1] -
3165 pdadc_tmp[table_size - 2];
3169 /* Extrapolate above */
3170 while ((pdadc_0 < (s16) pdadc_n) &&
3171 (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2)) {
3172 s16 tmp = pdadc_tmp[table_size - 1] +
3173 (pdadc_0 - max_idx) * pwr_step;
3174 pdadc_out[pdadc_i++] = (tmp > 127) ? 127 : (u8) tmp;
3179 while (pdg < AR5K_EEPROM_N_PD_GAINS) {
3180 gain_boundaries[pdg] = gain_boundaries[pdg - 1];
3184 while (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2) {
3185 pdadc_out[pdadc_i] = pdadc_out[pdadc_i - 1];
3189 /* Set gain boundaries */
3190 ath5k_hw_reg_write(ah,
3191 AR5K_REG_SM(pd_gain_overlap,
3192 AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP) |
3193 AR5K_REG_SM(gain_boundaries[0],
3194 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_1) |
3195 AR5K_REG_SM(gain_boundaries[1],
3196 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_2) |
3197 AR5K_REG_SM(gain_boundaries[2],
3198 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_3) |
3199 AR5K_REG_SM(gain_boundaries[3],
3200 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_4),
3203 /* Used for setting rate power table */
3204 ah->ah_txpower.txp_min_idx = pwr_min[0];
3209 * ath5k_write_pwr_to_pdadc_table() - Write the PDADC values on hw
3210 * @ah: The &struct ath5k_hw
3211 * @ee_mode: One of enum ath5k_driver_mode
3214 ath5k_write_pwr_to_pdadc_table(struct ath5k_hw *ah, u8 ee_mode)
3216 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
3217 u8 *pdadc_out = ah->ah_txpower.txp_pd_table;
3218 u8 *pdg_to_idx = ee->ee_pdc_to_idx[ee_mode];
3219 u8 pdcurves = ee->ee_pd_gains[ee_mode];
3223 /* Select the right pdgain curves */
3225 /* Clear current settings */
3226 reg = ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG1);
3227 reg &= ~(AR5K_PHY_TPC_RG1_PDGAIN_1 |
3228 AR5K_PHY_TPC_RG1_PDGAIN_2 |
3229 AR5K_PHY_TPC_RG1_PDGAIN_3 |
3230 AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
3233 * Use pd_gains curve from eeprom
3235 * This overrides the default setting from initvals
3236 * in case some vendors (e.g. Zcomax) don't use the default
3237 * curves. If we don't honor their settings we 'll get a
3238 * 5dB (1 * gain overlap ?) drop.
3240 reg |= AR5K_REG_SM(pdcurves, AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
3244 reg |= AR5K_REG_SM(pdg_to_idx[2], AR5K_PHY_TPC_RG1_PDGAIN_3);
3247 reg |= AR5K_REG_SM(pdg_to_idx[1], AR5K_PHY_TPC_RG1_PDGAIN_2);
3250 reg |= AR5K_REG_SM(pdg_to_idx[0], AR5K_PHY_TPC_RG1_PDGAIN_1);
3253 ath5k_hw_reg_write(ah, reg, AR5K_PHY_TPC_RG1);
3256 * Write TX power values
3258 for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
3259 u32 val = get_unaligned_le32(&pdadc_out[4 * i]);
3260 ath5k_hw_reg_write(ah, val, AR5K_PHY_PDADC_TXPOWER(i));
3266 * Common code for PCDAC/PDADC tables
3270 * ath5k_setup_channel_powertable() - Set up power table for this channel
3271 * @ah: The &struct ath5k_hw
3272 * @channel: The &struct ieee80211_channel
3273 * @ee_mode: One of enum ath5k_driver_mode
3274 * @type: One of enum ath5k_powertable_type (eeprom.h)
3276 * This is the main function that uses all of the above
3277 * to set PCDAC/PDADC table on hw for the current channel.
3278 * This table is used for tx power calibration on the baseband,
3279 * without it we get weird tx power levels and in some cases
3280 * distorted spectral mask
3283 ath5k_setup_channel_powertable(struct ath5k_hw *ah,
3284 struct ieee80211_channel *channel,
3285 u8 ee_mode, u8 type)
3287 struct ath5k_pdgain_info *pdg_L, *pdg_R;
3288 struct ath5k_chan_pcal_info *pcinfo_L;
3289 struct ath5k_chan_pcal_info *pcinfo_R;
3290 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
3291 u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode];
3292 s16 table_min[AR5K_EEPROM_N_PD_GAINS];
3293 s16 table_max[AR5K_EEPROM_N_PD_GAINS];
3296 u32 target = channel->center_freq;
3299 /* Get surrounding freq piers for this channel */
3300 ath5k_get_chan_pcal_surrounding_piers(ah, channel,
3304 /* Loop over pd gain curves on
3305 * surrounding freq piers by index */
3306 for (pdg = 0; pdg < ee->ee_pd_gains[ee_mode]; pdg++) {
3308 /* Fill curves in reverse order
3309 * from lower power (max gain)
3310 * to higher power. Use curve -> idx
3311 * backmapping we did on eeprom init */
3312 u8 idx = pdg_curve_to_idx[pdg];
3314 /* Grab the needed curves by index */
3315 pdg_L = &pcinfo_L->pd_curves[idx];
3316 pdg_R = &pcinfo_R->pd_curves[idx];
3318 /* Initialize the temp tables */
3319 tmpL = ah->ah_txpower.tmpL[pdg];
3320 tmpR = ah->ah_txpower.tmpR[pdg];
3322 /* Set curve's x boundaries and create
3323 * curves so that they cover the same
3324 * range (if we don't do that one table
3325 * will have values on some range and the
3326 * other one won't have any so interpolation
3328 table_min[pdg] = min(pdg_L->pd_pwr[0],
3329 pdg_R->pd_pwr[0]) / 2;
3331 table_max[pdg] = max(pdg_L->pd_pwr[pdg_L->pd_points - 1],
3332 pdg_R->pd_pwr[pdg_R->pd_points - 1]) / 2;
3334 /* Now create the curves on surrounding channels
3335 * and interpolate if needed to get the final
3336 * curve for this gain on this channel */
3338 case AR5K_PWRTABLE_LINEAR_PCDAC:
3339 /* Override min/max so that we don't loose
3340 * accuracy (don't divide by 2) */
3341 table_min[pdg] = min(pdg_L->pd_pwr[0],
3345 max(pdg_L->pd_pwr[pdg_L->pd_points - 1],
3346 pdg_R->pd_pwr[pdg_R->pd_points - 1]);
3348 /* Override minimum so that we don't get
3349 * out of bounds while extrapolating
3350 * below. Don't do this when we have 2
3351 * curves and we are on the high power curve
3352 * because table_min is ok in this case */
3353 if (!(ee->ee_pd_gains[ee_mode] > 1 && pdg == 0)) {
3356 ath5k_get_linear_pcdac_min(pdg_L->pd_step,
3361 /* Don't go too low because we will
3362 * miss the upper part of the curve.
3363 * Note: 126 = 31.5dB (max power supported)
3364 * in 0.25dB units */
3365 if (table_max[pdg] - table_min[pdg] > 126)
3366 table_min[pdg] = table_max[pdg] - 126;
3370 case AR5K_PWRTABLE_PWR_TO_PCDAC:
3371 case AR5K_PWRTABLE_PWR_TO_PDADC:
3373 ath5k_create_power_curve(table_min[pdg],
3377 pdg_L->pd_points, tmpL, type);
3379 /* We are in a calibration
3380 * pier, no need to interpolate
3381 * between freq piers */
3382 if (pcinfo_L == pcinfo_R)
3385 ath5k_create_power_curve(table_min[pdg],
3389 pdg_R->pd_points, tmpR, type);
3395 /* Interpolate between curves
3396 * of surrounding freq piers to
3397 * get the final curve for this
3398 * pd gain. Re-use tmpL for interpolation
3400 for (i = 0; (i < (u16) (table_max[pdg] - table_min[pdg])) &&
3401 (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) {
3402 tmpL[i] = (u8) ath5k_get_interpolated_value(target,
3403 (s16) pcinfo_L->freq,
3404 (s16) pcinfo_R->freq,
3410 /* Now we have a set of curves for this
3411 * channel on tmpL (x range is table_max - table_min
3412 * and y values are tmpL[pdg][]) sorted in the same
3413 * order as EEPROM (because we've used the backmapping).
3414 * So for RF5112 it's from higher power to lower power
3415 * and for RF2413 it's from lower power to higher power.
3416 * For RF5111 we only have one curve. */
3418 /* Fill min and max power levels for this
3419 * channel by interpolating the values on
3420 * surrounding channels to complete the dataset */
3421 ah->ah_txpower.txp_min_pwr = ath5k_get_interpolated_value(target,
3422 (s16) pcinfo_L->freq,
3423 (s16) pcinfo_R->freq,
3424 pcinfo_L->min_pwr, pcinfo_R->min_pwr);
3426 ah->ah_txpower.txp_max_pwr = ath5k_get_interpolated_value(target,
3427 (s16) pcinfo_L->freq,
3428 (s16) pcinfo_R->freq,
3429 pcinfo_L->max_pwr, pcinfo_R->max_pwr);
3431 /* Fill PCDAC/PDADC table */
3433 case AR5K_PWRTABLE_LINEAR_PCDAC:
3434 /* For RF5112 we can have one or two curves
3435 * and each curve covers a certain power lvl
3436 * range so we need to do some more processing */
3437 ath5k_combine_linear_pcdac_curves(ah, table_min, table_max,
3438 ee->ee_pd_gains[ee_mode]);
3440 /* Set txp.offset so that we can
3441 * match max power value with max
3443 ah->ah_txpower.txp_offset = 64 - (table_max[0] / 2);
3445 case AR5K_PWRTABLE_PWR_TO_PCDAC:
3446 /* We are done for RF5111 since it has only
3447 * one curve, just fit the curve on the table */
3448 ath5k_fill_pwr_to_pcdac_table(ah, table_min, table_max);
3450 /* No rate powertable adjustment for RF5111 */
3451 ah->ah_txpower.txp_min_idx = 0;
3452 ah->ah_txpower.txp_offset = 0;
3454 case AR5K_PWRTABLE_PWR_TO_PDADC:
3455 /* Set PDADC boundaries and fill
3456 * final PDADC table */
3457 ath5k_combine_pwr_to_pdadc_curves(ah, table_min, table_max,
3458 ee->ee_pd_gains[ee_mode]);
3460 /* Set txp.offset, note that table_min
3461 * can be negative */
3462 ah->ah_txpower.txp_offset = table_min[0];
3468 ah->ah_txpower.txp_setup = true;
3474 * ath5k_write_channel_powertable() - Set power table for current channel on hw
3475 * @ah: The &struct ath5k_hw
3476 * @ee_mode: One of enum ath5k_driver_mode
3477 * @type: One of enum ath5k_powertable_type (eeprom.h)
3480 ath5k_write_channel_powertable(struct ath5k_hw *ah, u8 ee_mode, u8 type)
3482 if (type == AR5K_PWRTABLE_PWR_TO_PDADC)
3483 ath5k_write_pwr_to_pdadc_table(ah, ee_mode);
3485 ath5k_write_pcdac_table(ah);
3490 * DOC: Per-rate tx power setting
3492 * This is the code that sets the desired tx power limit (below
3493 * maximum) on hw for each rate (we also have TPC that sets
3494 * power per packet type). We do that by providing an index on the
3495 * PCDAC/PDADC table we set up above, for each rate.
3497 * For now we only limit txpower based on maximum tx power
3498 * supported by hw (what's inside rate_info) + conformance test
3499 * limits. We need to limit this even more, based on regulatory domain
3500 * etc to be safe. Normally this is done from above so we don't care
3501 * here, all we care is that the tx power we set will be O.K.
3502 * for the hw (e.g. won't create noise on PA etc).
3504 * Rate power table contains indices to PCDAC/PDADC table (0.5dB steps -
3505 * x values) and is indexed as follows:
3506 * rates[0] - rates[7] -> OFDM rates
3507 * rates[8] - rates[14] -> CCK rates
3508 * rates[15] -> XR rates (they all have the same power)
3512 * ath5k_setup_rate_powertable() - Set up rate power table for a given tx power
3513 * @ah: The &struct ath5k_hw
3514 * @max_pwr: The maximum tx power requested in 0.5dB steps
3515 * @rate_info: The &struct ath5k_rate_pcal_info to fill
3516 * @ee_mode: One of enum ath5k_driver_mode
3519 ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr,
3520 struct ath5k_rate_pcal_info *rate_info,
3525 s16 rate_idx_scaled = 0;
3527 /* max_pwr is power level we got from driver/user in 0.5dB
3528 * units, switch to 0.25dB units so we can compare */
3530 max_pwr = min(max_pwr, (u16) ah->ah_txpower.txp_max_pwr) / 2;
3532 /* apply rate limits */
3533 rates = ah->ah_txpower.txp_rates_power_table;
3535 /* OFDM rates 6 to 24Mb/s */
3536 for (i = 0; i < 5; i++)
3537 rates[i] = min(max_pwr, rate_info->target_power_6to24);
3539 /* Rest OFDM rates */
3540 rates[5] = min(rates[0], rate_info->target_power_36);
3541 rates[6] = min(rates[0], rate_info->target_power_48);
3542 rates[7] = min(rates[0], rate_info->target_power_54);
3546 rates[8] = min(rates[0], rate_info->target_power_6to24);
3548 rates[9] = min(rates[0], rate_info->target_power_36);
3550 rates[10] = min(rates[0], rate_info->target_power_36);
3552 rates[11] = min(rates[0], rate_info->target_power_48);
3554 rates[12] = min(rates[0], rate_info->target_power_48);
3556 rates[13] = min(rates[0], rate_info->target_power_54);
3558 rates[14] = min(rates[0], rate_info->target_power_54);
3561 rates[15] = min(rates[0], rate_info->target_power_6to24);
3563 /* CCK rates have different peak to average ratio
3564 * so we have to tweak their power so that gainf
3565 * correction works ok. For this we use OFDM to
3566 * CCK delta from eeprom */
3567 if ((ee_mode == AR5K_EEPROM_MODE_11G) &&
3568 (ah->ah_phy_revision < AR5K_SREV_PHY_5212A))
3569 for (i = 8; i <= 15; i++)
3570 rates[i] -= ah->ah_txpower.txp_cck_ofdm_gainf_delta;
3572 /* Save min/max and current tx power for this channel
3575 * Note: We use rates[0] for current tx power because
3576 * it covers most of the rates, in most cases. It's our
3577 * tx power limit and what the user expects to see. */
3578 ah->ah_txpower.txp_min_pwr = 2 * rates[7];
3579 ah->ah_txpower.txp_cur_pwr = 2 * rates[0];
3581 /* Set max txpower for correct OFDM operation on all rates
3582 * -that is the txpower for 54Mbit-, it's used for the PAPD
3583 * gain probe and it's in 0.5dB units */
3584 ah->ah_txpower.txp_ofdm = rates[7];
3586 /* Now that we have all rates setup use table offset to
3587 * match the power range set by user with the power indices
3588 * on PCDAC/PDADC table */
3589 for (i = 0; i < 16; i++) {
3590 rate_idx_scaled = rates[i] + ah->ah_txpower.txp_offset;
3591 /* Don't get out of bounds */
3592 if (rate_idx_scaled > 63)
3593 rate_idx_scaled = 63;
3594 if (rate_idx_scaled < 0)
3595 rate_idx_scaled = 0;
3596 rates[i] = rate_idx_scaled;
3602 * ath5k_hw_txpower() - Set transmission power limit for a given channel
3603 * @ah: The &struct ath5k_hw
3604 * @channel: The &struct ieee80211_channel
3605 * @txpower: Requested tx power in 0.5dB steps
3607 * Combines all of the above to set the requested tx power limit
3611 ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
3614 struct ath5k_rate_pcal_info rate_info;
3615 struct ieee80211_channel *curr_channel = ah->ah_current_channel;
3620 if (txpower > AR5K_TUNE_MAX_TXPOWER) {
3621 ATH5K_ERR(ah, "invalid tx power: %u\n", txpower);
3625 ee_mode = ath5k_eeprom_mode_from_channel(channel);
3628 "invalid channel: %d\n", channel->center_freq);
3632 /* Initialize TX power table */
3633 switch (ah->ah_radio) {
3638 type = AR5K_PWRTABLE_PWR_TO_PCDAC;
3641 type = AR5K_PWRTABLE_LINEAR_PCDAC;
3648 type = AR5K_PWRTABLE_PWR_TO_PDADC;
3655 * If we don't change channel/mode skip tx powertable calculation
3656 * and use the cached one.
3658 if (!ah->ah_txpower.txp_setup ||
3659 (channel->hw_value != curr_channel->hw_value) ||
3660 (channel->center_freq != curr_channel->center_freq)) {
3661 /* Reset TX power values but preserve requested
3662 * tx power from above */
3663 int requested_txpower = ah->ah_txpower.txp_requested;
3665 memset(&ah->ah_txpower, 0, sizeof(ah->ah_txpower));
3667 /* Restore TPC setting and requested tx power */
3668 ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER;
3670 ah->ah_txpower.txp_requested = requested_txpower;
3672 /* Calculate the powertable */
3673 ret = ath5k_setup_channel_powertable(ah, channel,
3679 /* Write table on hw */
3680 ath5k_write_channel_powertable(ah, ee_mode, type);
3682 /* Limit max power if we have a CTL available */
3683 ath5k_get_max_ctl_power(ah, channel);
3685 /* FIXME: Antenna reduction stuff */
3687 /* FIXME: Limit power on turbo modes */
3689 /* FIXME: TPC scale reduction */
3691 /* Get surrounding channels for per-rate power table
3693 ath5k_get_rate_pcal_data(ah, channel, &rate_info);
3695 /* Setup rate power table */
3696 ath5k_setup_rate_powertable(ah, txpower, &rate_info, ee_mode);
3698 /* Write rate power table on hw */
3699 ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(3, 24) |
3700 AR5K_TXPOWER_OFDM(2, 16) | AR5K_TXPOWER_OFDM(1, 8) |
3701 AR5K_TXPOWER_OFDM(0, 0), AR5K_PHY_TXPOWER_RATE1);
3703 ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(7, 24) |
3704 AR5K_TXPOWER_OFDM(6, 16) | AR5K_TXPOWER_OFDM(5, 8) |
3705 AR5K_TXPOWER_OFDM(4, 0), AR5K_PHY_TXPOWER_RATE2);
3707 ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(10, 24) |
3708 AR5K_TXPOWER_CCK(9, 16) | AR5K_TXPOWER_CCK(15, 8) |
3709 AR5K_TXPOWER_CCK(8, 0), AR5K_PHY_TXPOWER_RATE3);
3711 ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(14, 24) |
3712 AR5K_TXPOWER_CCK(13, 16) | AR5K_TXPOWER_CCK(12, 8) |
3713 AR5K_TXPOWER_CCK(11, 0), AR5K_PHY_TXPOWER_RATE4);
3715 /* FIXME: TPC support */
3716 if (ah->ah_txpower.txp_tpc) {
3717 ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX_TPC_ENABLE |
3718 AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
3720 ath5k_hw_reg_write(ah,
3721 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_ACK) |
3722 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CTS) |
3723 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CHIRP),
3726 ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX |
3727 AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
3734 * ath5k_hw_set_txpower_limit() - Set txpower limit for the current channel
3735 * @ah: The &struct ath5k_hw
3736 * @txpower: The requested tx power limit in 0.5dB steps
3738 * This function provides access to ath5k_hw_txpower to the driver in
3739 * case user or an application changes it while PHY is running.
3742 ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, u8 txpower)
3744 ATH5K_DBG(ah, ATH5K_DEBUG_TXPOWER,
3745 "changing txpower to %d\n", txpower);
3747 return ath5k_hw_txpower(ah, ah->ah_current_channel, txpower);
3756 * ath5k_hw_phy_init() - Initialize PHY
3757 * @ah: The &struct ath5k_hw
3758 * @channel: The @struct ieee80211_channel
3759 * @mode: One of enum ath5k_driver_mode
3760 * @fast: Try a fast channel switch instead
3762 * This is the main function used during reset to initialize PHY
3763 * or do a fast channel change if possible.
3765 * NOTE: Do not call this one from the driver, it assumes PHY is in a
3766 * warm reset state !
3769 ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
3772 struct ieee80211_channel *curr_channel;
3778 * Sanity check for fast flag
3779 * Don't try fast channel change when changing modulation
3780 * mode/band. We check for chip compatibility on
3783 curr_channel = ah->ah_current_channel;
3784 if (fast && (channel->hw_value != curr_channel->hw_value))
3788 * On fast channel change we only set the synth parameters
3789 * while PHY is running, enable calibration and skip the rest.
3792 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_RFBUS_REQ,
3793 AR5K_PHY_RFBUS_REQ_REQUEST);
3794 for (i = 0; i < 100; i++) {
3795 if (ath5k_hw_reg_read(ah, AR5K_PHY_RFBUS_GRANT))
3803 /* Set channel and wait for synth */
3804 ret = ath5k_hw_channel(ah, channel);
3808 ath5k_hw_wait_for_synth(ah, channel);
3814 * Note: We need to do that before we set
3815 * RF buffer settings on 5211/5212+ so that we
3816 * properly set curve indices.
3818 ret = ath5k_hw_txpower(ah, channel, ah->ah_txpower.txp_requested ?
3819 ah->ah_txpower.txp_requested * 2 :
3820 AR5K_TUNE_MAX_TXPOWER);
3824 /* Write OFDM timings on 5212*/
3825 if (ah->ah_version == AR5K_AR5212 &&
3826 channel->hw_value != AR5K_MODE_11B) {
3828 ret = ath5k_hw_write_ofdm_timings(ah, channel);
3832 /* Spur info is available only from EEPROM versions
3833 * greater than 5.3, but the EEPROM routines will use
3834 * static values for older versions */
3835 if (ah->ah_mac_srev >= AR5K_SREV_AR5424)
3836 ath5k_hw_set_spur_mitigation_filter(ah,
3840 /* If we used fast channel switching
3841 * we are done, release RF bus and
3842 * fire up NF calibration.
3844 * Note: Only NF calibration due to
3845 * channel change, not AGC calibration
3846 * since AGC is still running !
3850 * Release RF Bus grant
3852 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_RFBUS_REQ,
3853 AR5K_PHY_RFBUS_REQ_REQUEST);
3856 * Start NF calibration
3858 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
3859 AR5K_PHY_AGCCTL_NF);
3865 * For 5210 we do all initialization using
3866 * initvals, so we don't have to modify
3867 * any settings (5210 also only supports
3870 if (ah->ah_version != AR5K_AR5210) {
3873 * Write initial RF gain settings
3874 * This should work for both 5111/5112
3876 ret = ath5k_hw_rfgain_init(ah, channel->band);
3880 usleep_range(1000, 1500);
3885 ret = ath5k_hw_rfregs_init(ah, channel, mode);
3889 /*Enable/disable 802.11b mode on 5111
3890 (enable 2111 frequency converter + CCK)*/
3891 if (ah->ah_radio == AR5K_RF5111) {
3892 if (mode == AR5K_MODE_11B)
3893 AR5K_REG_ENABLE_BITS(ah, AR5K_TXCFG,
3896 AR5K_REG_DISABLE_BITS(ah, AR5K_TXCFG,
3900 } else if (ah->ah_version == AR5K_AR5210) {
3901 usleep_range(1000, 1500);
3902 /* Disable phy and wait */
3903 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT);
3904 usleep_range(1000, 1500);
3907 /* Set channel on PHY */
3908 ret = ath5k_hw_channel(ah, channel);
3913 * Enable the PHY and wait until completion
3914 * This includes BaseBand and Synthesizer
3917 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
3919 ath5k_hw_wait_for_synth(ah, channel);
3922 * Perform ADC test to see if baseband is ready
3923 * Set tx hold and check adc test register
3925 phy_tst1 = ath5k_hw_reg_read(ah, AR5K_PHY_TST1);
3926 ath5k_hw_reg_write(ah, AR5K_PHY_TST1_TXHOLD, AR5K_PHY_TST1);
3927 for (i = 0; i <= 20; i++) {
3928 if (!(ath5k_hw_reg_read(ah, AR5K_PHY_ADC_TEST) & 0x10))
3930 usleep_range(200, 250);
3932 ath5k_hw_reg_write(ah, phy_tst1, AR5K_PHY_TST1);
3935 * Start automatic gain control calibration
3937 * During AGC calibration RX path is re-routed to
3938 * a power detector so we don't receive anything.
3940 * This method is used to calibrate some static offsets
3941 * used together with on-the fly I/Q calibration (the
3942 * one performed via ath5k_hw_phy_calibrate), which doesn't
3943 * interrupt rx path.
3945 * While rx path is re-routed to the power detector we also
3946 * start a noise floor calibration to measure the
3947 * card's noise floor (the noise we measure when we are not
3948 * transmitting or receiving anything).
3950 * If we are in a noisy environment, AGC calibration may time
3951 * out and/or noise floor calibration might timeout.
3953 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
3954 AR5K_PHY_AGCCTL_CAL | AR5K_PHY_AGCCTL_NF);
3956 /* At the same time start I/Q calibration for QAM constellation
3957 * -no need for CCK- */
3958 ah->ah_iq_cal_needed = false;
3959 if (!(mode == AR5K_MODE_11B)) {
3960 ah->ah_iq_cal_needed = true;
3961 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
3962 AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
3963 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
3967 /* Wait for gain calibration to finish (we check for I/Q calibration
3968 * during ath5k_phy_calibrate) */
3969 if (ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
3970 AR5K_PHY_AGCCTL_CAL, 0, false)) {
3971 ATH5K_ERR(ah, "gain calibration timeout (%uMHz)\n",
3972 channel->center_freq);
3975 /* Restore antenna mode */
3976 ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode);