4 * Copyright (c) 2004-2007 Reyk Floeter <reyk@openbsd.org>
5 * Copyright (c) 2006-2009 Nick Kossifidis <mickflemm@gmail.com>
6 * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
7 * Copyright (c) 2008-2009 Felix Fietkau <nbd@openwrt.org>
9 * Permission to use, copy, modify, and distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 #include <linux/delay.h>
24 #include <linux/slab.h>
25 #include <asm/unaligned.h>
39 * Get the PHY Chip revision
41 u16 ath5k_hw_radio_revision(struct ath5k_hw *ah, unsigned int chan)
48 * Set the radio chip access register
52 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_2GHZ, AR5K_PHY(0));
55 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
63 /* ...wait until PHY is ready and read the selected radio revision */
64 ath5k_hw_reg_write(ah, 0x00001c16, AR5K_PHY(0x34));
66 for (i = 0; i < 8; i++)
67 ath5k_hw_reg_write(ah, 0x00010000, AR5K_PHY(0x20));
69 if (ah->ah_version == AR5K_AR5210) {
70 srev = ath5k_hw_reg_read(ah, AR5K_PHY(256) >> 28) & 0xf;
71 ret = (u16)ath5k_hw_bitswap(srev, 4) + 1;
73 srev = (ath5k_hw_reg_read(ah, AR5K_PHY(0x100)) >> 24) & 0xff;
74 ret = (u16)ath5k_hw_bitswap(((srev & 0xf0) >> 4) |
75 ((srev & 0x0f) << 4), 8);
78 /* Reset to the 5GHz mode */
79 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
85 * Check if a channel is supported
87 bool ath5k_channel_ok(struct ath5k_hw *ah, u16 freq, unsigned int flags)
89 /* Check if the channel is in our supported range */
90 if (flags & CHANNEL_2GHZ) {
91 if ((freq >= ah->ah_capabilities.cap_range.range_2ghz_min) &&
92 (freq <= ah->ah_capabilities.cap_range.range_2ghz_max))
94 } else if (flags & CHANNEL_5GHZ)
95 if ((freq >= ah->ah_capabilities.cap_range.range_5ghz_min) &&
96 (freq <= ah->ah_capabilities.cap_range.range_5ghz_max))
102 bool ath5k_hw_chan_has_spur_noise(struct ath5k_hw *ah,
103 struct ieee80211_channel *channel)
107 if ((ah->ah_radio == AR5K_RF5112) ||
108 (ah->ah_radio == AR5K_RF5413) ||
109 (ah->ah_radio == AR5K_RF2413) ||
110 (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4)))
115 if ((channel->center_freq % refclk_freq != 0) &&
116 ((channel->center_freq % refclk_freq < 10) ||
117 (channel->center_freq % refclk_freq > 22)))
124 * Used to modify RF Banks before writing them to AR5K_RF_BUFFER
126 static unsigned int ath5k_hw_rfb_op(struct ath5k_hw *ah,
127 const struct ath5k_rf_reg *rf_regs,
128 u32 val, u8 reg_id, bool set)
130 const struct ath5k_rf_reg *rfreg = NULL;
131 u8 offset, bank, num_bits, col, position;
133 u32 mask, data, last_bit, bits_shifted, first_bit;
139 rfb = ah->ah_rf_banks;
141 for (i = 0; i < ah->ah_rf_regs_count; i++) {
142 if (rf_regs[i].index == reg_id) {
148 if (rfb == NULL || rfreg == NULL) {
149 ATH5K_PRINTF("Rf register not found!\n");
150 /* should not happen */
155 num_bits = rfreg->field.len;
156 first_bit = rfreg->field.pos;
157 col = rfreg->field.col;
159 /* first_bit is an offset from bank's
160 * start. Since we have all banks on
161 * the same array, we use this offset
162 * to mark each bank's start */
163 offset = ah->ah_offset[bank];
166 if (!(col <= 3 && num_bits <= 32 && first_bit + num_bits <= 319)) {
167 ATH5K_PRINTF("invalid values at offset %u\n", offset);
171 entry = ((first_bit - 1) / 8) + offset;
172 position = (first_bit - 1) % 8;
175 data = ath5k_hw_bitswap(val, num_bits);
177 for (bits_shifted = 0, bits_left = num_bits; bits_left > 0;
178 position = 0, entry++) {
180 last_bit = (position + bits_left > 8) ? 8 :
181 position + bits_left;
183 mask = (((1 << last_bit) - 1) ^ ((1 << position) - 1)) <<
188 rfb[entry] |= ((data << position) << (col * 8)) & mask;
189 data >>= (8 - position);
191 data |= (((rfb[entry] & mask) >> (col * 8)) >> position)
193 bits_shifted += last_bit - position;
196 bits_left -= 8 - position;
199 data = set ? 1 : ath5k_hw_bitswap(data, num_bits);
205 * ath5k_hw_write_ofdm_timings - set OFDM timings on AR5212
207 * @ah: the &struct ath5k_hw
208 * @channel: the currently set channel upon reset
210 * Write the delta slope coefficient (used on pilot tracking ?) for OFDM
211 * operation on the AR5212 upon reset. This is a helper for ath5k_hw_phy_init.
213 * Since delta slope is floating point we split it on its exponent and
214 * mantissa and provide these values on hw.
216 * For more infos i think this patent is related
217 * http://www.freepatentsonline.com/7184495.html
219 static inline int ath5k_hw_write_ofdm_timings(struct ath5k_hw *ah,
220 struct ieee80211_channel *channel)
222 /* Get exponent and mantissa and set it */
223 u32 coef_scaled, coef_exp, coef_man,
224 ds_coef_exp, ds_coef_man, clock;
226 BUG_ON(!(ah->ah_version == AR5K_AR5212) ||
227 !(channel->hw_value & CHANNEL_OFDM));
230 * ALGO: coef = (5 * clock / carrier_freq) / 2
231 * we scale coef by shifting clock value by 24 for
232 * better precision since we use integers */
233 switch (ah->ah_bwmode) {
234 case AR5K_BWMODE_40MHZ:
237 case AR5K_BWMODE_10MHZ:
240 case AR5K_BWMODE_5MHZ:
247 coef_scaled = ((5 * (clock << 24)) / 2) / channel->center_freq;
250 * ALGO: coef_exp = 14 - highest set bit position */
251 coef_exp = ilog2(coef_scaled);
253 /* Doesn't make sense if it's zero*/
254 if (!coef_scaled || !coef_exp)
257 /* Note: we've shifted coef_scaled by 24 */
258 coef_exp = 14 - (coef_exp - 24);
261 /* Get mantissa (significant digits)
262 * ALGO: coef_mant = floor(coef_scaled* 2^coef_exp+0.5) */
263 coef_man = coef_scaled +
264 (1 << (24 - coef_exp - 1));
266 /* Calculate delta slope coefficient exponent
267 * and mantissa (remove scaling) and set them on hw */
268 ds_coef_man = coef_man >> (24 - coef_exp);
269 ds_coef_exp = coef_exp - 16;
271 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_3,
272 AR5K_PHY_TIMING_3_DSC_MAN, ds_coef_man);
273 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_3,
274 AR5K_PHY_TIMING_3_DSC_EXP, ds_coef_exp);
279 int ath5k_hw_phy_disable(struct ath5k_hw *ah)
282 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT);
288 * Wait for synth to settle
290 static void ath5k_hw_wait_for_synth(struct ath5k_hw *ah,
291 struct ieee80211_channel *channel)
294 * On 5211+ read activation -> rx delay
295 * and use it (100ns steps).
297 if (ah->ah_version != AR5K_AR5210) {
299 delay = ath5k_hw_reg_read(ah, AR5K_PHY_RX_DELAY) &
301 delay = (channel->hw_value & CHANNEL_CCK) ?
302 ((delay << 2) / 22) : (delay / 10);
303 if (ah->ah_bwmode == AR5K_BWMODE_10MHZ)
305 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ)
307 /* XXX: /2 on turbo ? Let's be safe
316 /**********************\
317 * RF Gain optimization *
318 \**********************/
321 * This code is used to optimize RF gain on different environments
322 * (temperature mostly) based on feedback from a power detector.
324 * It's only used on RF5111 and RF5112, later RF chips seem to have
325 * auto adjustment on hw -notice they have a much smaller BANK 7 and
326 * no gain optimization ladder-.
328 * For more infos check out this patent doc
329 * http://www.freepatentsonline.com/7400691.html
331 * This paper describes power drops as seen on the receiver due to
333 * http://www.cnri.dit.ie/publications/ICT08%20-%20Practical%20Issues
334 * %20of%20Power%20Control.pdf
336 * And this is the MadWiFi bug entry related to the above
337 * http://madwifi-project.org/ticket/1659
338 * with various measurements and diagrams
340 * TODO: Deal with power drops due to probes by setting an appropriate
341 * tx power on the probe packets ! Make this part of the calibration process.
344 /* Initialize ah_gain during attach */
345 int ath5k_hw_rfgain_opt_init(struct ath5k_hw *ah)
347 /* Initialize the gain optimization values */
348 switch (ah->ah_radio) {
350 ah->ah_gain.g_step_idx = rfgain_opt_5111.go_default;
351 ah->ah_gain.g_low = 20;
352 ah->ah_gain.g_high = 35;
353 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
356 ah->ah_gain.g_step_idx = rfgain_opt_5112.go_default;
357 ah->ah_gain.g_low = 20;
358 ah->ah_gain.g_high = 85;
359 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
368 /* Schedule a gain probe check on the next transmitted packet.
369 * That means our next packet is going to be sent with lower
370 * tx power and a Peak to Average Power Detector (PAPD) will try
371 * to measure the gain.
373 * XXX: How about forcing a tx packet (bypassing PCU arbitrator etc)
374 * just after we enable the probe so that we don't mess with
375 * standard traffic ? Maybe it's time to use sw interrupts and
376 * a probe tasklet !!!
378 static void ath5k_hw_request_rfgain_probe(struct ath5k_hw *ah)
381 /* Skip if gain calibration is inactive or
382 * we already handle a probe request */
383 if (ah->ah_gain.g_state != AR5K_RFGAIN_ACTIVE)
386 /* Send the packet with 2dB below max power as
387 * patent doc suggest */
388 ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txpower.txp_ofdm - 4,
389 AR5K_PHY_PAPD_PROBE_TXPOWER) |
390 AR5K_PHY_PAPD_PROBE_TX_NEXT, AR5K_PHY_PAPD_PROBE);
392 ah->ah_gain.g_state = AR5K_RFGAIN_READ_REQUESTED;
396 /* Calculate gain_F measurement correction
397 * based on the current step for RF5112 rev. 2 */
398 static u32 ath5k_hw_rf_gainf_corr(struct ath5k_hw *ah)
402 const struct ath5k_gain_opt *go;
403 const struct ath5k_gain_opt_step *g_step;
404 const struct ath5k_rf_reg *rf_regs;
406 /* Only RF5112 Rev. 2 supports it */
407 if ((ah->ah_radio != AR5K_RF5112) ||
408 (ah->ah_radio_5ghz_revision <= AR5K_SREV_RAD_5112A))
411 go = &rfgain_opt_5112;
412 rf_regs = rf_regs_5112a;
413 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112a);
415 g_step = &go->go_step[ah->ah_gain.g_step_idx];
417 if (ah->ah_rf_banks == NULL)
420 rf = ah->ah_rf_banks;
421 ah->ah_gain.g_f_corr = 0;
423 /* No VGA (Variable Gain Amplifier) override, skip */
424 if (ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXVGA_OVR, false) != 1)
427 /* Mix gain stepping */
428 step = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXGAIN_STEP, false);
430 /* Mix gain override */
431 mix = g_step->gos_param[0];
435 ah->ah_gain.g_f_corr = step * 2;
438 ah->ah_gain.g_f_corr = (step - 5) * 2;
441 ah->ah_gain.g_f_corr = step;
444 ah->ah_gain.g_f_corr = 0;
448 return ah->ah_gain.g_f_corr;
451 /* Check if current gain_F measurement is in the range of our
452 * power detector windows. If we get a measurement outside range
453 * we know it's not accurate (detectors can't measure anything outside
454 * their detection window) so we must ignore it */
455 static bool ath5k_hw_rf_check_gainf_readback(struct ath5k_hw *ah)
457 const struct ath5k_rf_reg *rf_regs;
458 u32 step, mix_ovr, level[4];
461 if (ah->ah_rf_banks == NULL)
464 rf = ah->ah_rf_banks;
466 if (ah->ah_radio == AR5K_RF5111) {
468 rf_regs = rf_regs_5111;
469 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5111);
471 step = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_RFGAIN_STEP,
475 level[1] = (step == 63) ? 50 : step + 4;
476 level[2] = (step != 63) ? 64 : level[0];
477 level[3] = level[2] + 50;
479 ah->ah_gain.g_high = level[3] -
480 (step == 63 ? AR5K_GAIN_DYN_ADJUST_HI_MARGIN : -5);
481 ah->ah_gain.g_low = level[0] +
482 (step == 63 ? AR5K_GAIN_DYN_ADJUST_LO_MARGIN : 0);
485 rf_regs = rf_regs_5112;
486 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112);
488 mix_ovr = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXVGA_OVR,
491 level[0] = level[2] = 0;
494 level[1] = level[3] = 83;
496 level[1] = level[3] = 107;
497 ah->ah_gain.g_high = 55;
501 return (ah->ah_gain.g_current >= level[0] &&
502 ah->ah_gain.g_current <= level[1]) ||
503 (ah->ah_gain.g_current >= level[2] &&
504 ah->ah_gain.g_current <= level[3]);
507 /* Perform gain_F adjustment by choosing the right set
508 * of parameters from RF gain optimization ladder */
509 static s8 ath5k_hw_rf_gainf_adjust(struct ath5k_hw *ah)
511 const struct ath5k_gain_opt *go;
512 const struct ath5k_gain_opt_step *g_step;
515 switch (ah->ah_radio) {
517 go = &rfgain_opt_5111;
520 go = &rfgain_opt_5112;
526 g_step = &go->go_step[ah->ah_gain.g_step_idx];
528 if (ah->ah_gain.g_current >= ah->ah_gain.g_high) {
530 /* Reached maximum */
531 if (ah->ah_gain.g_step_idx == 0)
534 for (ah->ah_gain.g_target = ah->ah_gain.g_current;
535 ah->ah_gain.g_target >= ah->ah_gain.g_high &&
536 ah->ah_gain.g_step_idx > 0;
537 g_step = &go->go_step[ah->ah_gain.g_step_idx])
538 ah->ah_gain.g_target -= 2 *
539 (go->go_step[--(ah->ah_gain.g_step_idx)].gos_gain -
546 if (ah->ah_gain.g_current <= ah->ah_gain.g_low) {
548 /* Reached minimum */
549 if (ah->ah_gain.g_step_idx == (go->go_steps_count - 1))
552 for (ah->ah_gain.g_target = ah->ah_gain.g_current;
553 ah->ah_gain.g_target <= ah->ah_gain.g_low &&
554 ah->ah_gain.g_step_idx < go->go_steps_count - 1;
555 g_step = &go->go_step[ah->ah_gain.g_step_idx])
556 ah->ah_gain.g_target -= 2 *
557 (go->go_step[++ah->ah_gain.g_step_idx].gos_gain -
565 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
566 "ret %d, gain step %u, current gain %u, target gain %u\n",
567 ret, ah->ah_gain.g_step_idx, ah->ah_gain.g_current,
568 ah->ah_gain.g_target);
573 /* Main callback for thermal RF gain calibration engine
574 * Check for a new gain reading and schedule an adjustment
577 * TODO: Use sw interrupt to schedule reset if gain_F needs
579 enum ath5k_rfgain ath5k_hw_gainf_calibrate(struct ath5k_hw *ah)
582 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
584 if (ah->ah_rf_banks == NULL ||
585 ah->ah_gain.g_state == AR5K_RFGAIN_INACTIVE)
586 return AR5K_RFGAIN_INACTIVE;
588 /* No check requested, either engine is inactive
589 * or an adjustment is already requested */
590 if (ah->ah_gain.g_state != AR5K_RFGAIN_READ_REQUESTED)
593 /* Read the PAPD (Peak to Average Power Detector)
595 data = ath5k_hw_reg_read(ah, AR5K_PHY_PAPD_PROBE);
597 /* No probe is scheduled, read gain_F measurement */
598 if (!(data & AR5K_PHY_PAPD_PROBE_TX_NEXT)) {
599 ah->ah_gain.g_current = data >> AR5K_PHY_PAPD_PROBE_GAINF_S;
600 type = AR5K_REG_MS(data, AR5K_PHY_PAPD_PROBE_TYPE);
602 /* If tx packet is CCK correct the gain_F measurement
603 * by cck ofdm gain delta */
604 if (type == AR5K_PHY_PAPD_PROBE_TYPE_CCK) {
605 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A)
606 ah->ah_gain.g_current +=
607 ee->ee_cck_ofdm_gain_delta;
609 ah->ah_gain.g_current +=
610 AR5K_GAIN_CCK_PROBE_CORR;
613 /* Further correct gain_F measurement for
615 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) {
616 ath5k_hw_rf_gainf_corr(ah);
617 ah->ah_gain.g_current =
618 ah->ah_gain.g_current >= ah->ah_gain.g_f_corr ?
619 (ah->ah_gain.g_current - ah->ah_gain.g_f_corr) :
623 /* Check if measurement is ok and if we need
624 * to adjust gain, schedule a gain adjustment,
625 * else switch back to the active state */
626 if (ath5k_hw_rf_check_gainf_readback(ah) &&
627 AR5K_GAIN_CHECK_ADJUST(&ah->ah_gain) &&
628 ath5k_hw_rf_gainf_adjust(ah)) {
629 ah->ah_gain.g_state = AR5K_RFGAIN_NEED_CHANGE;
631 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
636 return ah->ah_gain.g_state;
639 /* Write initial RF gain table to set the RF sensitivity
640 * this one works on all RF chips and has nothing to do
641 * with gain_F calibration */
642 static int ath5k_hw_rfgain_init(struct ath5k_hw *ah, enum ieee80211_band band)
644 const struct ath5k_ini_rfgain *ath5k_rfg;
645 unsigned int i, size, index;
647 switch (ah->ah_radio) {
649 ath5k_rfg = rfgain_5111;
650 size = ARRAY_SIZE(rfgain_5111);
653 ath5k_rfg = rfgain_5112;
654 size = ARRAY_SIZE(rfgain_5112);
657 ath5k_rfg = rfgain_2413;
658 size = ARRAY_SIZE(rfgain_2413);
661 ath5k_rfg = rfgain_2316;
662 size = ARRAY_SIZE(rfgain_2316);
665 ath5k_rfg = rfgain_5413;
666 size = ARRAY_SIZE(rfgain_5413);
670 ath5k_rfg = rfgain_2425;
671 size = ARRAY_SIZE(rfgain_2425);
677 index = (band == IEEE80211_BAND_2GHZ) ? 1 : 0;
679 for (i = 0; i < size; i++) {
681 ath5k_hw_reg_write(ah, ath5k_rfg[i].rfg_value[index],
682 (u32)ath5k_rfg[i].rfg_register);
690 /********************\
691 * RF Registers setup *
692 \********************/
695 * Setup RF registers by writing RF buffer on hw
697 static int ath5k_hw_rfregs_init(struct ath5k_hw *ah,
698 struct ieee80211_channel *channel, unsigned int mode)
700 const struct ath5k_rf_reg *rf_regs;
701 const struct ath5k_ini_rfbuffer *ini_rfb;
702 const struct ath5k_gain_opt *go = NULL;
703 const struct ath5k_gain_opt_step *g_step;
704 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
707 int i, obdb = -1, bank = -1;
709 switch (ah->ah_radio) {
711 rf_regs = rf_regs_5111;
712 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5111);
714 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5111);
715 go = &rfgain_opt_5111;
718 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) {
719 rf_regs = rf_regs_5112a;
720 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112a);
722 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5112a);
724 rf_regs = rf_regs_5112;
725 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112);
727 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5112);
729 go = &rfgain_opt_5112;
732 rf_regs = rf_regs_2413;
733 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2413);
735 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2413);
738 rf_regs = rf_regs_2316;
739 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2316);
741 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2316);
744 rf_regs = rf_regs_5413;
745 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5413);
747 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5413);
750 rf_regs = rf_regs_2425;
751 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2425);
753 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2317);
756 rf_regs = rf_regs_2425;
757 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2425);
758 if (ah->ah_mac_srev < AR5K_SREV_AR2417) {
760 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2425);
763 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2417);
770 /* If it's the first time we set RF buffer, allocate
771 * ah->ah_rf_banks based on ah->ah_rf_banks_size
773 if (ah->ah_rf_banks == NULL) {
774 ah->ah_rf_banks = kmalloc(sizeof(u32) * ah->ah_rf_banks_size,
776 if (ah->ah_rf_banks == NULL) {
777 ATH5K_ERR(ah, "out of memory\n");
782 /* Copy values to modify them */
783 rfb = ah->ah_rf_banks;
785 for (i = 0; i < ah->ah_rf_banks_size; i++) {
786 if (ini_rfb[i].rfb_bank >= AR5K_MAX_RF_BANKS) {
787 ATH5K_ERR(ah, "invalid bank\n");
791 /* Bank changed, write down the offset */
792 if (bank != ini_rfb[i].rfb_bank) {
793 bank = ini_rfb[i].rfb_bank;
794 ah->ah_offset[bank] = i;
797 rfb[i] = ini_rfb[i].rfb_mode_data[mode];
800 /* Set Output and Driver bias current (OB/DB) */
801 if (channel->hw_value & CHANNEL_2GHZ) {
803 if (channel->hw_value & CHANNEL_CCK)
804 ee_mode = AR5K_EEPROM_MODE_11B;
806 ee_mode = AR5K_EEPROM_MODE_11G;
808 /* For RF511X/RF211X combination we
809 * use b_OB and b_DB parameters stored
810 * in eeprom on ee->ee_ob[ee_mode][0]
812 * For all other chips we use OB/DB for 2GHz
813 * stored in the b/g modal section just like
814 * 802.11a on ee->ee_ob[ee_mode][1] */
815 if ((ah->ah_radio == AR5K_RF5111) ||
816 (ah->ah_radio == AR5K_RF5112))
821 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb],
822 AR5K_RF_OB_2GHZ, true);
824 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb],
825 AR5K_RF_DB_2GHZ, true);
827 /* RF5111 always needs OB/DB for 5GHz, even if we use 2GHz */
828 } else if ((channel->hw_value & CHANNEL_5GHZ) ||
829 (ah->ah_radio == AR5K_RF5111)) {
831 /* For 11a, Turbo and XR we need to choose
832 * OB/DB based on frequency range */
833 ee_mode = AR5K_EEPROM_MODE_11A;
834 obdb = channel->center_freq >= 5725 ? 3 :
835 (channel->center_freq >= 5500 ? 2 :
836 (channel->center_freq >= 5260 ? 1 :
837 (channel->center_freq > 4000 ? 0 : -1)));
842 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb],
843 AR5K_RF_OB_5GHZ, true);
845 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb],
846 AR5K_RF_DB_5GHZ, true);
849 g_step = &go->go_step[ah->ah_gain.g_step_idx];
851 /* Set turbo mode (N/A on RF5413) */
852 if ((ah->ah_bwmode == AR5K_BWMODE_40MHZ) &&
853 (ah->ah_radio != AR5K_RF5413))
854 ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_TURBO, false);
856 /* Bank Modifications (chip-specific) */
857 if (ah->ah_radio == AR5K_RF5111) {
859 /* Set gain_F settings according to current step */
860 if (channel->hw_value & CHANNEL_OFDM) {
862 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_FRAME_CTL,
863 AR5K_PHY_FRAME_CTL_TX_CLIP,
864 g_step->gos_param[0]);
866 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1],
867 AR5K_RF_PWD_90, true);
869 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2],
870 AR5K_RF_PWD_84, true);
872 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3],
873 AR5K_RF_RFGAIN_SEL, true);
875 /* We programmed gain_F parameters, switch back
877 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
883 ath5k_hw_rfb_op(ah, rf_regs, !ee->ee_xpd[ee_mode],
884 AR5K_RF_PWD_XPD, true);
886 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_x_gain[ee_mode],
887 AR5K_RF_XPD_GAIN, true);
889 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode],
890 AR5K_RF_GAIN_I, true);
892 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode],
893 AR5K_RF_PLO_SEL, true);
895 /* Tweak power detectors for half/quarter rate support */
896 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ ||
897 ah->ah_bwmode == AR5K_BWMODE_10MHZ) {
900 ath5k_hw_rfb_op(ah, rf_regs, 0x1f,
901 AR5K_RF_WAIT_S, true);
903 wait_i = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ?
906 ath5k_hw_rfb_op(ah, rf_regs, wait_i,
907 AR5K_RF_WAIT_I, true);
908 ath5k_hw_rfb_op(ah, rf_regs, 3,
909 AR5K_RF_MAX_TIME, true);
914 if (ah->ah_radio == AR5K_RF5112) {
916 /* Set gain_F settings according to current step */
917 if (channel->hw_value & CHANNEL_OFDM) {
919 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[0],
920 AR5K_RF_MIXGAIN_OVR, true);
922 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1],
923 AR5K_RF_PWD_138, true);
925 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2],
926 AR5K_RF_PWD_137, true);
928 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3],
929 AR5K_RF_PWD_136, true);
931 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[4],
932 AR5K_RF_PWD_132, true);
934 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[5],
935 AR5K_RF_PWD_131, true);
937 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[6],
938 AR5K_RF_PWD_130, true);
940 /* We programmed gain_F parameters, switch back
942 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
947 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode],
948 AR5K_RF_XPD_SEL, true);
950 if (ah->ah_radio_5ghz_revision < AR5K_SREV_RAD_5112A) {
951 /* Rev. 1 supports only one xpd */
952 ath5k_hw_rfb_op(ah, rf_regs,
953 ee->ee_x_gain[ee_mode],
954 AR5K_RF_XPD_GAIN, true);
957 u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode];
958 if (ee->ee_pd_gains[ee_mode] > 1) {
959 ath5k_hw_rfb_op(ah, rf_regs,
961 AR5K_RF_PD_GAIN_LO, true);
962 ath5k_hw_rfb_op(ah, rf_regs,
964 AR5K_RF_PD_GAIN_HI, true);
966 ath5k_hw_rfb_op(ah, rf_regs,
968 AR5K_RF_PD_GAIN_LO, true);
969 ath5k_hw_rfb_op(ah, rf_regs,
971 AR5K_RF_PD_GAIN_HI, true);
974 /* Lower synth voltage on Rev 2 */
975 if (ah->ah_radio == AR5K_RF5112 &&
976 (ah->ah_radio_5ghz_revision & AR5K_SREV_REV) > 0) {
977 ath5k_hw_rfb_op(ah, rf_regs, 2,
978 AR5K_RF_HIGH_VC_CP, true);
980 ath5k_hw_rfb_op(ah, rf_regs, 2,
981 AR5K_RF_MID_VC_CP, true);
983 ath5k_hw_rfb_op(ah, rf_regs, 2,
984 AR5K_RF_LOW_VC_CP, true);
986 ath5k_hw_rfb_op(ah, rf_regs, 2,
987 AR5K_RF_PUSH_UP, true);
990 /* Decrease power consumption on 5213+ BaseBand */
991 if (ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) {
992 ath5k_hw_rfb_op(ah, rf_regs, 1,
993 AR5K_RF_PAD2GND, true);
995 ath5k_hw_rfb_op(ah, rf_regs, 1,
996 AR5K_RF_XB2_LVL, true);
998 ath5k_hw_rfb_op(ah, rf_regs, 1,
999 AR5K_RF_XB5_LVL, true);
1001 ath5k_hw_rfb_op(ah, rf_regs, 1,
1002 AR5K_RF_PWD_167, true);
1004 ath5k_hw_rfb_op(ah, rf_regs, 1,
1005 AR5K_RF_PWD_166, true);
1009 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode],
1010 AR5K_RF_GAIN_I, true);
1012 /* Tweak power detector for half/quarter rates */
1013 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ ||
1014 ah->ah_bwmode == AR5K_BWMODE_10MHZ) {
1017 pd_delay = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ?
1020 ath5k_hw_rfb_op(ah, rf_regs, pd_delay,
1021 AR5K_RF_PD_PERIOD_A, true);
1022 ath5k_hw_rfb_op(ah, rf_regs, 0xf,
1023 AR5K_RF_PD_DELAY_A, true);
1028 if (ah->ah_radio == AR5K_RF5413 &&
1029 channel->hw_value & CHANNEL_2GHZ) {
1031 ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_DERBY_CHAN_SEL_MODE,
1034 /* Set optimum value for early revisions (on pci-e chips) */
1035 if (ah->ah_mac_srev >= AR5K_SREV_AR5424 &&
1036 ah->ah_mac_srev < AR5K_SREV_AR5413)
1037 ath5k_hw_rfb_op(ah, rf_regs, ath5k_hw_bitswap(6, 3),
1038 AR5K_RF_PWD_ICLOBUF_2G, true);
1042 /* Write RF banks on hw */
1043 for (i = 0; i < ah->ah_rf_banks_size; i++) {
1045 ath5k_hw_reg_write(ah, rfb[i], ini_rfb[i].rfb_ctrl_register);
1052 /**************************\
1053 PHY/RF channel functions
1054 \**************************/
1057 * Conversion needed for RF5110
1059 static u32 ath5k_hw_rf5110_chan2athchan(struct ieee80211_channel *channel)
1064 * Convert IEEE channel/MHz to an internal channel value used
1065 * by the AR5210 chipset. This has not been verified with
1066 * newer chipsets like the AR5212A who have a completely
1067 * different RF/PHY part.
1069 athchan = (ath5k_hw_bitswap(
1070 (ieee80211_frequency_to_channel(
1071 channel->center_freq) - 24) / 2, 5)
1072 << 1) | (1 << 6) | 0x1;
1077 * Set channel on RF5110
1079 static int ath5k_hw_rf5110_channel(struct ath5k_hw *ah,
1080 struct ieee80211_channel *channel)
1085 * Set the channel and wait
1087 data = ath5k_hw_rf5110_chan2athchan(channel);
1088 ath5k_hw_reg_write(ah, data, AR5K_RF_BUFFER);
1089 ath5k_hw_reg_write(ah, 0, AR5K_RF_BUFFER_CONTROL_0);
1096 * Conversion needed for 5111
1098 static int ath5k_hw_rf5111_chan2athchan(unsigned int ieee,
1099 struct ath5k_athchan_2ghz *athchan)
1103 /* Cast this value to catch negative channel numbers (>= -19) */
1104 channel = (int)ieee;
1107 * Map 2GHz IEEE channel to 5GHz Atheros channel
1109 if (channel <= 13) {
1110 athchan->a2_athchan = 115 + channel;
1111 athchan->a2_flags = 0x46;
1112 } else if (channel == 14) {
1113 athchan->a2_athchan = 124;
1114 athchan->a2_flags = 0x44;
1115 } else if (channel >= 15 && channel <= 26) {
1116 athchan->a2_athchan = ((channel - 14) * 4) + 132;
1117 athchan->a2_flags = 0x46;
1125 * Set channel on 5111
1127 static int ath5k_hw_rf5111_channel(struct ath5k_hw *ah,
1128 struct ieee80211_channel *channel)
1130 struct ath5k_athchan_2ghz ath5k_channel_2ghz;
1131 unsigned int ath5k_channel =
1132 ieee80211_frequency_to_channel(channel->center_freq);
1133 u32 data0, data1, clock;
1137 * Set the channel on the RF5111 radio
1141 if (channel->hw_value & CHANNEL_2GHZ) {
1142 /* Map 2GHz channel to 5GHz Atheros channel ID */
1143 ret = ath5k_hw_rf5111_chan2athchan(
1144 ieee80211_frequency_to_channel(channel->center_freq),
1145 &ath5k_channel_2ghz);
1149 ath5k_channel = ath5k_channel_2ghz.a2_athchan;
1150 data0 = ((ath5k_hw_bitswap(ath5k_channel_2ghz.a2_flags, 8) & 0xff)
1154 if (ath5k_channel < 145 || !(ath5k_channel & 1)) {
1156 data1 = ((ath5k_hw_bitswap(ath5k_channel - 24, 8) & 0xff) << 2) |
1157 (clock << 1) | (1 << 10) | 1;
1160 data1 = ((ath5k_hw_bitswap((ath5k_channel - 24) / 2, 8) & 0xff)
1161 << 2) | (clock << 1) | (1 << 10) | 1;
1164 ath5k_hw_reg_write(ah, (data1 & 0xff) | ((data0 & 0xff) << 8),
1166 ath5k_hw_reg_write(ah, ((data1 >> 8) & 0xff) | (data0 & 0xff00),
1167 AR5K_RF_BUFFER_CONTROL_3);
1173 * Set channel on 5112 and newer
1175 static int ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
1176 struct ieee80211_channel *channel)
1178 u32 data, data0, data1, data2;
1181 data = data0 = data1 = data2 = 0;
1182 c = channel->center_freq;
1185 if (!((c - 2224) % 5)) {
1186 data0 = ((2 * (c - 704)) - 3040) / 10;
1188 } else if (!((c - 2192) % 5)) {
1189 data0 = ((2 * (c - 672)) - 3040) / 10;
1194 data0 = ath5k_hw_bitswap((data0 << 2) & 0xff, 8);
1195 } else if ((c % 5) != 2 || c > 5435) {
1196 if (!(c % 20) && c >= 5120) {
1197 data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
1198 data2 = ath5k_hw_bitswap(3, 2);
1199 } else if (!(c % 10)) {
1200 data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
1201 data2 = ath5k_hw_bitswap(2, 2);
1202 } else if (!(c % 5)) {
1203 data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
1204 data2 = ath5k_hw_bitswap(1, 2);
1208 data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8);
1209 data2 = ath5k_hw_bitswap(0, 2);
1212 data = (data0 << 4) | (data1 << 1) | (data2 << 2) | 0x1001;
1214 ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
1215 ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
1221 * Set the channel on the RF2425
1223 static int ath5k_hw_rf2425_channel(struct ath5k_hw *ah,
1224 struct ieee80211_channel *channel)
1226 u32 data, data0, data2;
1229 data = data0 = data2 = 0;
1230 c = channel->center_freq;
1233 data0 = ath5k_hw_bitswap((c - 2272), 8);
1236 } else if ((c % 5) != 2 || c > 5435) {
1237 if (!(c % 20) && c < 5120)
1238 data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
1240 data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
1242 data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
1245 data2 = ath5k_hw_bitswap(1, 2);
1247 data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8);
1248 data2 = ath5k_hw_bitswap(0, 2);
1251 data = (data0 << 4) | data2 << 2 | 0x1001;
1253 ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
1254 ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
1260 * Set a channel on the radio chip
1262 static int ath5k_hw_channel(struct ath5k_hw *ah,
1263 struct ieee80211_channel *channel)
1267 * Check bounds supported by the PHY (we don't care about regulatory
1268 * restrictions at this point). Note: hw_value already has the band
1269 * (CHANNEL_2GHZ, or CHANNEL_5GHZ) so we inform ath5k_channel_ok()
1270 * of the band by that */
1271 if (!ath5k_channel_ok(ah, channel->center_freq, channel->hw_value)) {
1273 "channel frequency (%u MHz) out of supported "
1275 channel->center_freq);
1280 * Set the channel and wait
1282 switch (ah->ah_radio) {
1284 ret = ath5k_hw_rf5110_channel(ah, channel);
1287 ret = ath5k_hw_rf5111_channel(ah, channel);
1291 ret = ath5k_hw_rf2425_channel(ah, channel);
1294 ret = ath5k_hw_rf5112_channel(ah, channel);
1301 /* Set JAPAN setting for channel 14 */
1302 if (channel->center_freq == 2484) {
1303 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
1304 AR5K_PHY_CCKTXCTL_JAPAN);
1306 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
1307 AR5K_PHY_CCKTXCTL_WORLD);
1310 ah->ah_current_channel = channel;
1319 static s32 ath5k_hw_read_measured_noise_floor(struct ath5k_hw *ah)
1323 val = ath5k_hw_reg_read(ah, AR5K_PHY_NF);
1324 return sign_extend32(AR5K_REG_MS(val, AR5K_PHY_NF_MINCCA_PWR), 8);
1327 void ath5k_hw_init_nfcal_hist(struct ath5k_hw *ah)
1331 ah->ah_nfcal_hist.index = 0;
1332 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++)
1333 ah->ah_nfcal_hist.nfval[i] = AR5K_TUNE_CCA_MAX_GOOD_VALUE;
1336 static void ath5k_hw_update_nfcal_hist(struct ath5k_hw *ah, s16 noise_floor)
1338 struct ath5k_nfcal_hist *hist = &ah->ah_nfcal_hist;
1339 hist->index = (hist->index + 1) & (ATH5K_NF_CAL_HIST_MAX - 1);
1340 hist->nfval[hist->index] = noise_floor;
1343 static s16 ath5k_hw_get_median_noise_floor(struct ath5k_hw *ah)
1345 s16 sort[ATH5K_NF_CAL_HIST_MAX];
1349 memcpy(sort, ah->ah_nfcal_hist.nfval, sizeof(sort));
1350 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX - 1; i++) {
1351 for (j = 1; j < ATH5K_NF_CAL_HIST_MAX - i; j++) {
1352 if (sort[j] > sort[j - 1]) {
1354 sort[j] = sort[j - 1];
1359 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++) {
1360 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1361 "cal %d:%d\n", i, sort[i]);
1363 return sort[(ATH5K_NF_CAL_HIST_MAX - 1) / 2];
1367 * When we tell the hardware to perform a noise floor calibration
1368 * by setting the AR5K_PHY_AGCCTL_NF bit, it will periodically
1369 * sample-and-hold the minimum noise level seen at the antennas.
1370 * This value is then stored in a ring buffer of recently measured
1371 * noise floor values so we have a moving window of the last few
1374 * The median of the values in the history is then loaded into the
1375 * hardware for its own use for RSSI and CCA measurements.
1377 void ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
1379 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1384 /* keep last value if calibration hasn't completed */
1385 if (ath5k_hw_reg_read(ah, AR5K_PHY_AGCCTL) & AR5K_PHY_AGCCTL_NF) {
1386 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1387 "NF did not complete in calibration window\n");
1392 ee_mode = ath5k_eeprom_mode_from_channel(ah->ah_current_channel);
1394 /* completed NF calibration, test threshold */
1395 nf = ath5k_hw_read_measured_noise_floor(ah);
1396 threshold = ee->ee_noise_floor_thr[ee_mode];
1398 if (nf > threshold) {
1399 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1400 "noise floor failure detected; "
1401 "read %d, threshold %d\n",
1404 nf = AR5K_TUNE_CCA_MAX_GOOD_VALUE;
1407 ath5k_hw_update_nfcal_hist(ah, nf);
1408 nf = ath5k_hw_get_median_noise_floor(ah);
1410 /* load noise floor (in .5 dBm) so the hardware will use it */
1411 val = ath5k_hw_reg_read(ah, AR5K_PHY_NF) & ~AR5K_PHY_NF_M;
1412 val |= (nf * 2) & AR5K_PHY_NF_M;
1413 ath5k_hw_reg_write(ah, val, AR5K_PHY_NF);
1415 AR5K_REG_MASKED_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF,
1416 ~(AR5K_PHY_AGCCTL_NF_EN | AR5K_PHY_AGCCTL_NF_NOUPDATE));
1418 ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF,
1422 * Load a high max CCA Power value (-50 dBm in .5 dBm units)
1423 * so that we're not capped by the median we just loaded.
1424 * This will be used as the initial value for the next noise
1425 * floor calibration.
1427 val = (val & ~AR5K_PHY_NF_M) | ((-50 * 2) & AR5K_PHY_NF_M);
1428 ath5k_hw_reg_write(ah, val, AR5K_PHY_NF);
1429 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
1430 AR5K_PHY_AGCCTL_NF_EN |
1431 AR5K_PHY_AGCCTL_NF_NOUPDATE |
1432 AR5K_PHY_AGCCTL_NF);
1434 ah->ah_noise_floor = nf;
1436 ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE,
1437 "noise floor calibrated: %d\n", nf);
1441 * Perform a PHY calibration on RF5110
1442 * -Fix BPSK/QAM Constellation (I/Q correction)
1444 static int ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah,
1445 struct ieee80211_channel *channel)
1447 u32 phy_sig, phy_agc, phy_sat, beacon;
1451 * Disable beacons and RX/TX queues, wait
1453 AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW_5210,
1454 AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210);
1455 beacon = ath5k_hw_reg_read(ah, AR5K_BEACON_5210);
1456 ath5k_hw_reg_write(ah, beacon & ~AR5K_BEACON_ENABLE, AR5K_BEACON_5210);
1461 * Set the channel (with AGC turned off)
1463 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1465 ret = ath5k_hw_channel(ah, channel);
1468 * Activate PHY and wait
1470 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
1473 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1479 * Calibrate the radio chip
1482 /* Remember normal state */
1483 phy_sig = ath5k_hw_reg_read(ah, AR5K_PHY_SIG);
1484 phy_agc = ath5k_hw_reg_read(ah, AR5K_PHY_AGCCOARSE);
1485 phy_sat = ath5k_hw_reg_read(ah, AR5K_PHY_ADCSAT);
1487 /* Update radio registers */
1488 ath5k_hw_reg_write(ah, (phy_sig & ~(AR5K_PHY_SIG_FIRPWR)) |
1489 AR5K_REG_SM(-1, AR5K_PHY_SIG_FIRPWR), AR5K_PHY_SIG);
1491 ath5k_hw_reg_write(ah, (phy_agc & ~(AR5K_PHY_AGCCOARSE_HI |
1492 AR5K_PHY_AGCCOARSE_LO)) |
1493 AR5K_REG_SM(-1, AR5K_PHY_AGCCOARSE_HI) |
1494 AR5K_REG_SM(-127, AR5K_PHY_AGCCOARSE_LO), AR5K_PHY_AGCCOARSE);
1496 ath5k_hw_reg_write(ah, (phy_sat & ~(AR5K_PHY_ADCSAT_ICNT |
1497 AR5K_PHY_ADCSAT_THR)) |
1498 AR5K_REG_SM(2, AR5K_PHY_ADCSAT_ICNT) |
1499 AR5K_REG_SM(12, AR5K_PHY_ADCSAT_THR), AR5K_PHY_ADCSAT);
1503 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1505 ath5k_hw_reg_write(ah, AR5K_PHY_RFSTG_DISABLE, AR5K_PHY_RFSTG);
1506 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1511 * Enable calibration and wait until completion
1513 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_CAL);
1515 ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
1516 AR5K_PHY_AGCCTL_CAL, 0, false);
1518 /* Reset to normal state */
1519 ath5k_hw_reg_write(ah, phy_sig, AR5K_PHY_SIG);
1520 ath5k_hw_reg_write(ah, phy_agc, AR5K_PHY_AGCCOARSE);
1521 ath5k_hw_reg_write(ah, phy_sat, AR5K_PHY_ADCSAT);
1524 ATH5K_ERR(ah, "calibration timeout (%uMHz)\n",
1525 channel->center_freq);
1530 * Re-enable RX/TX and beacons
1532 AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW_5210,
1533 AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210);
1534 ath5k_hw_reg_write(ah, beacon, AR5K_BEACON_5210);
1540 * Perform I/Q calibration on RF5111/5112 and newer chips
1543 ath5k_hw_rf511x_iq_calibrate(struct ath5k_hw *ah)
1546 s32 iq_corr, i_coff, i_coffd, q_coff, q_coffd;
1549 if (!ah->ah_calibration ||
1550 ath5k_hw_reg_read(ah, AR5K_PHY_IQ) & AR5K_PHY_IQ_RUN)
1553 /* Calibration has finished, get the results and re-run */
1554 /* work around empty results which can apparently happen on 5212 */
1555 for (i = 0; i <= 10; i++) {
1556 iq_corr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_CORR);
1557 i_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_I);
1558 q_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_Q);
1559 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1560 "iq_corr:%x i_pwr:%x q_pwr:%x", iq_corr, i_pwr, q_pwr);
1565 i_coffd = ((i_pwr >> 1) + (q_pwr >> 1)) >> 7;
1567 if (ah->ah_version == AR5K_AR5211)
1568 q_coffd = q_pwr >> 6;
1570 q_coffd = q_pwr >> 7;
1572 /* protect against divide by 0 and loss of sign bits */
1573 if (i_coffd == 0 || q_coffd < 2)
1576 i_coff = (-iq_corr) / i_coffd;
1577 i_coff = clamp(i_coff, -32, 31); /* signed 6 bit */
1579 if (ah->ah_version == AR5K_AR5211)
1580 q_coff = (i_pwr / q_coffd) - 64;
1582 q_coff = (i_pwr / q_coffd) - 128;
1583 q_coff = clamp(q_coff, -16, 15); /* signed 5 bit */
1585 ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE,
1586 "new I:%d Q:%d (i_coffd:%x q_coffd:%x)",
1587 i_coff, q_coff, i_coffd, q_coffd);
1589 /* Commit new I/Q values (set enable bit last to match HAL sources) */
1590 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF, i_coff);
1591 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF, q_coff);
1592 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE);
1594 /* Re-enable calibration -if we don't we'll commit
1595 * the same values again and again */
1596 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
1597 AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
1598 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_RUN);
1604 * Perform a PHY calibration
1606 int ath5k_hw_phy_calibrate(struct ath5k_hw *ah,
1607 struct ieee80211_channel *channel)
1611 if (ah->ah_radio == AR5K_RF5110)
1612 return ath5k_hw_rf5110_calibrate(ah, channel);
1614 ret = ath5k_hw_rf511x_iq_calibrate(ah);
1616 if ((ah->ah_radio == AR5K_RF5111 || ah->ah_radio == AR5K_RF5112) &&
1617 (channel->hw_value & CHANNEL_OFDM))
1618 ath5k_hw_request_rfgain_probe(ah);
1624 /***************************\
1625 * Spur mitigation functions *
1626 \***************************/
1629 ath5k_hw_set_spur_mitigation_filter(struct ath5k_hw *ah,
1630 struct ieee80211_channel *channel)
1632 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1633 u32 mag_mask[4] = {0, 0, 0, 0};
1634 u32 pilot_mask[2] = {0, 0};
1635 /* Note: fbin values are scaled up by 2 */
1636 u16 spur_chan_fbin, chan_fbin, symbol_width, spur_detection_window;
1637 s32 spur_delta_phase, spur_freq_sigma_delta;
1638 s32 spur_offset, num_symbols_x16;
1639 u8 num_symbol_offsets, i, freq_band;
1641 /* Convert current frequency to fbin value (the same way channels
1642 * are stored on EEPROM, check out ath5k_eeprom_bin2freq) and scale
1643 * up by 2 so we can compare it later */
1644 if (channel->hw_value & CHANNEL_2GHZ) {
1645 chan_fbin = (channel->center_freq - 2300) * 10;
1646 freq_band = AR5K_EEPROM_BAND_2GHZ;
1648 chan_fbin = (channel->center_freq - 4900) * 10;
1649 freq_band = AR5K_EEPROM_BAND_5GHZ;
1652 /* Check if any spur_chan_fbin from EEPROM is
1653 * within our current channel's spur detection range */
1654 spur_chan_fbin = AR5K_EEPROM_NO_SPUR;
1655 spur_detection_window = AR5K_SPUR_CHAN_WIDTH;
1656 /* XXX: Half/Quarter channels ?*/
1657 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
1658 spur_detection_window *= 2;
1660 for (i = 0; i < AR5K_EEPROM_N_SPUR_CHANS; i++) {
1661 spur_chan_fbin = ee->ee_spur_chans[i][freq_band];
1663 /* Note: mask cleans AR5K_EEPROM_NO_SPUR flag
1664 * so it's zero if we got nothing from EEPROM */
1665 if (spur_chan_fbin == AR5K_EEPROM_NO_SPUR) {
1666 spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK;
1670 if ((chan_fbin - spur_detection_window <=
1671 (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK)) &&
1672 (chan_fbin + spur_detection_window >=
1673 (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK))) {
1674 spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK;
1679 /* We need to enable spur filter for this channel */
1680 if (spur_chan_fbin) {
1681 spur_offset = spur_chan_fbin - chan_fbin;
1684 * spur_freq_sigma_delta -> spur_offset / sample_freq << 21
1685 * spur_delta_phase -> spur_offset / chip_freq << 11
1686 * Note: Both values have 100Hz resolution
1688 switch (ah->ah_bwmode) {
1689 case AR5K_BWMODE_40MHZ:
1690 /* Both sample_freq and chip_freq are 80MHz */
1691 spur_delta_phase = (spur_offset << 16) / 25;
1692 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1693 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz * 2;
1695 case AR5K_BWMODE_10MHZ:
1696 /* Both sample_freq and chip_freq are 20MHz (?) */
1697 spur_delta_phase = (spur_offset << 18) / 25;
1698 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1699 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 2;
1700 case AR5K_BWMODE_5MHZ:
1701 /* Both sample_freq and chip_freq are 10MHz (?) */
1702 spur_delta_phase = (spur_offset << 19) / 25;
1703 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1704 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 4;
1706 if (channel->hw_value == CHANNEL_A) {
1707 /* Both sample_freq and chip_freq are 40MHz */
1708 spur_delta_phase = (spur_offset << 17) / 25;
1709 spur_freq_sigma_delta =
1710 (spur_delta_phase >> 10);
1712 AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz;
1714 /* sample_freq -> 40MHz chip_freq -> 44MHz
1715 * (for b compatibility) */
1716 spur_delta_phase = (spur_offset << 17) / 25;
1717 spur_freq_sigma_delta =
1718 (spur_offset << 8) / 55;
1720 AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz;
1725 /* Calculate pilot and magnitude masks */
1727 /* Scale up spur_offset by 1000 to switch to 100HZ resolution
1728 * and divide by symbol_width to find how many symbols we have
1729 * Note: number of symbols is scaled up by 16 */
1730 num_symbols_x16 = ((spur_offset * 1000) << 4) / symbol_width;
1732 /* Spur is on a symbol if num_symbols_x16 % 16 is zero */
1733 if (!(num_symbols_x16 & 0xF))
1735 num_symbol_offsets = 3;
1738 num_symbol_offsets = 4;
1740 for (i = 0; i < num_symbol_offsets; i++) {
1742 /* Calculate pilot mask */
1744 (num_symbols_x16 / 16) + i + 25;
1746 /* Pilot magnitude mask seems to be a way to
1747 * declare the boundaries for our detection
1748 * window or something, it's 2 for the middle
1749 * value(s) where the symbol is expected to be
1750 * and 1 on the boundary values */
1752 (i == 0 || i == (num_symbol_offsets - 1))
1755 if (curr_sym_off >= 0 && curr_sym_off <= 32) {
1756 if (curr_sym_off <= 25)
1757 pilot_mask[0] |= 1 << curr_sym_off;
1758 else if (curr_sym_off >= 27)
1759 pilot_mask[0] |= 1 << (curr_sym_off - 1);
1760 } else if (curr_sym_off >= 33 && curr_sym_off <= 52)
1761 pilot_mask[1] |= 1 << (curr_sym_off - 33);
1763 /* Calculate magnitude mask (for viterbi decoder) */
1764 if (curr_sym_off >= -1 && curr_sym_off <= 14)
1766 plt_mag_map << (curr_sym_off + 1) * 2;
1767 else if (curr_sym_off >= 15 && curr_sym_off <= 30)
1769 plt_mag_map << (curr_sym_off - 15) * 2;
1770 else if (curr_sym_off >= 31 && curr_sym_off <= 46)
1772 plt_mag_map << (curr_sym_off - 31) * 2;
1773 else if (curr_sym_off >= 47 && curr_sym_off <= 53)
1775 plt_mag_map << (curr_sym_off - 47) * 2;
1779 /* Write settings on hw to enable spur filter */
1780 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
1781 AR5K_PHY_BIN_MASK_CTL_RATE, 0xff);
1782 /* XXX: Self correlator also ? */
1783 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
1784 AR5K_PHY_IQ_PILOT_MASK_EN |
1785 AR5K_PHY_IQ_CHAN_MASK_EN |
1786 AR5K_PHY_IQ_SPUR_FILT_EN);
1788 /* Set delta phase and freq sigma delta */
1789 ath5k_hw_reg_write(ah,
1790 AR5K_REG_SM(spur_delta_phase,
1791 AR5K_PHY_TIMING_11_SPUR_DELTA_PHASE) |
1792 AR5K_REG_SM(spur_freq_sigma_delta,
1793 AR5K_PHY_TIMING_11_SPUR_FREQ_SD) |
1794 AR5K_PHY_TIMING_11_USE_SPUR_IN_AGC,
1795 AR5K_PHY_TIMING_11);
1797 /* Write pilot masks */
1798 ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_7);
1799 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8,
1800 AR5K_PHY_TIMING_8_PILOT_MASK_2,
1803 ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_9);
1804 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10,
1805 AR5K_PHY_TIMING_10_PILOT_MASK_2,
1808 /* Write magnitude masks */
1809 ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK_1);
1810 ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK_2);
1811 ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK_3);
1812 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
1813 AR5K_PHY_BIN_MASK_CTL_MASK_4,
1816 ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK2_1);
1817 ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK2_2);
1818 ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK2_3);
1819 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4,
1820 AR5K_PHY_BIN_MASK2_4_MASK_4,
1823 } else if (ath5k_hw_reg_read(ah, AR5K_PHY_IQ) &
1824 AR5K_PHY_IQ_SPUR_FILT_EN) {
1825 /* Clean up spur mitigation settings and disable filter */
1826 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
1827 AR5K_PHY_BIN_MASK_CTL_RATE, 0);
1828 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_IQ,
1829 AR5K_PHY_IQ_PILOT_MASK_EN |
1830 AR5K_PHY_IQ_CHAN_MASK_EN |
1831 AR5K_PHY_IQ_SPUR_FILT_EN);
1832 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_11);
1834 /* Clear pilot masks */
1835 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_7);
1836 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8,
1837 AR5K_PHY_TIMING_8_PILOT_MASK_2,
1840 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_9);
1841 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10,
1842 AR5K_PHY_TIMING_10_PILOT_MASK_2,
1845 /* Clear magnitude masks */
1846 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_1);
1847 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_2);
1848 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_3);
1849 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
1850 AR5K_PHY_BIN_MASK_CTL_MASK_4,
1853 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_1);
1854 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_2);
1855 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_3);
1856 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4,
1857 AR5K_PHY_BIN_MASK2_4_MASK_4,
1867 static void /*TODO:Boundary check*/
1868 ath5k_hw_set_def_antenna(struct ath5k_hw *ah, u8 ant)
1870 if (ah->ah_version != AR5K_AR5210)
1871 ath5k_hw_reg_write(ah, ant & 0x7, AR5K_DEFAULT_ANTENNA);
1875 * Enable/disable fast rx antenna diversity
1878 ath5k_hw_set_fast_div(struct ath5k_hw *ah, u8 ee_mode, bool enable)
1881 case AR5K_EEPROM_MODE_11G:
1882 /* XXX: This is set to
1883 * disabled on initvals !!! */
1884 case AR5K_EEPROM_MODE_11A:
1886 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGCCTL,
1887 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
1889 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
1890 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
1892 case AR5K_EEPROM_MODE_11B:
1893 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
1894 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
1901 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
1902 AR5K_PHY_RESTART_DIV_GC, 4);
1904 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
1905 AR5K_PHY_FAST_ANT_DIV_EN);
1907 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
1908 AR5K_PHY_RESTART_DIV_GC, 0);
1910 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
1911 AR5K_PHY_FAST_ANT_DIV_EN);
1916 ath5k_hw_set_antenna_switch(struct ath5k_hw *ah, u8 ee_mode)
1921 * In case a fixed antenna was set as default
1922 * use the same switch table twice.
1924 if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_A)
1925 ant0 = ant1 = AR5K_ANT_SWTABLE_A;
1926 else if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_B)
1927 ant0 = ant1 = AR5K_ANT_SWTABLE_B;
1929 ant0 = AR5K_ANT_SWTABLE_A;
1930 ant1 = AR5K_ANT_SWTABLE_B;
1933 /* Set antenna idle switch table */
1934 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_ANT_CTL,
1935 AR5K_PHY_ANT_CTL_SWTABLE_IDLE,
1936 (ah->ah_ant_ctl[ee_mode][AR5K_ANT_CTL] |
1937 AR5K_PHY_ANT_CTL_TXRX_EN));
1939 /* Set antenna switch tables */
1940 ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant0],
1941 AR5K_PHY_ANT_SWITCH_TABLE_0);
1942 ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant1],
1943 AR5K_PHY_ANT_SWITCH_TABLE_1);
1947 * Set antenna operating mode
1950 ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode)
1952 struct ieee80211_channel *channel = ah->ah_current_channel;
1953 bool use_def_for_tx, update_def_on_tx, use_def_for_rts, fast_div;
1954 bool use_def_for_sg;
1959 /* if channel is not initialized yet we can't set the antennas
1960 * so just store the mode. it will be set on the next reset */
1961 if (channel == NULL) {
1962 ah->ah_ant_mode = ant_mode;
1966 def_ant = ah->ah_def_ant;
1968 ee_mode = ath5k_eeprom_mode_from_channel(channel);
1971 "invalid channel: %d\n", channel->center_freq);
1976 case AR5K_ANTMODE_DEFAULT:
1978 use_def_for_tx = false;
1979 update_def_on_tx = false;
1980 use_def_for_rts = false;
1981 use_def_for_sg = false;
1984 case AR5K_ANTMODE_FIXED_A:
1987 use_def_for_tx = true;
1988 update_def_on_tx = false;
1989 use_def_for_rts = true;
1990 use_def_for_sg = true;
1993 case AR5K_ANTMODE_FIXED_B:
1996 use_def_for_tx = true;
1997 update_def_on_tx = false;
1998 use_def_for_rts = true;
1999 use_def_for_sg = true;
2002 case AR5K_ANTMODE_SINGLE_AP:
2003 def_ant = 1; /* updated on tx */
2005 use_def_for_tx = true;
2006 update_def_on_tx = true;
2007 use_def_for_rts = true;
2008 use_def_for_sg = true;
2011 case AR5K_ANTMODE_SECTOR_AP:
2012 tx_ant = 1; /* variable */
2013 use_def_for_tx = false;
2014 update_def_on_tx = false;
2015 use_def_for_rts = true;
2016 use_def_for_sg = false;
2019 case AR5K_ANTMODE_SECTOR_STA:
2020 tx_ant = 1; /* variable */
2021 use_def_for_tx = true;
2022 update_def_on_tx = false;
2023 use_def_for_rts = true;
2024 use_def_for_sg = false;
2027 case AR5K_ANTMODE_DEBUG:
2030 use_def_for_tx = false;
2031 update_def_on_tx = false;
2032 use_def_for_rts = false;
2033 use_def_for_sg = false;
2040 ah->ah_tx_ant = tx_ant;
2041 ah->ah_ant_mode = ant_mode;
2042 ah->ah_def_ant = def_ant;
2044 sta_id1 |= use_def_for_tx ? AR5K_STA_ID1_DEFAULT_ANTENNA : 0;
2045 sta_id1 |= update_def_on_tx ? AR5K_STA_ID1_DESC_ANTENNA : 0;
2046 sta_id1 |= use_def_for_rts ? AR5K_STA_ID1_RTS_DEF_ANTENNA : 0;
2047 sta_id1 |= use_def_for_sg ? AR5K_STA_ID1_SELFGEN_DEF_ANT : 0;
2049 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_ANTENNA_SETTINGS);
2052 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1, sta_id1);
2054 ath5k_hw_set_antenna_switch(ah, ee_mode);
2055 /* Note: set diversity before default antenna
2056 * because it won't work correctly */
2057 ath5k_hw_set_fast_div(ah, ee_mode, fast_div);
2058 ath5k_hw_set_def_antenna(ah, def_ant);
2071 * Do linear interpolation between two given (x, y) points
2074 ath5k_get_interpolated_value(s16 target, s16 x_left, s16 x_right,
2075 s16 y_left, s16 y_right)
2079 /* Avoid divide by zero and skip interpolation
2080 * if we have the same point */
2081 if ((x_left == x_right) || (y_left == y_right))
2085 * Since we use ints and not fps, we need to scale up in
2086 * order to get a sane ratio value (or else we 'll eg. get
2087 * always 1 instead of 1.25, 1.75 etc). We scale up by 100
2088 * to have some accuracy both for 0.5 and 0.25 steps.
2090 ratio = ((100 * y_right - 100 * y_left) / (x_right - x_left));
2092 /* Now scale down to be in range */
2093 result = y_left + (ratio * (target - x_left) / 100);
2099 * Find vertical boundary (min pwr) for the linear PCDAC curve.
2101 * Since we have the top of the curve and we draw the line below
2102 * until we reach 1 (1 pcdac step) we need to know which point
2103 * (x value) that is so that we don't go below y axis and have negative
2104 * pcdac values when creating the curve, or fill the table with zeroes.
2107 ath5k_get_linear_pcdac_min(const u8 *stepL, const u8 *stepR,
2108 const s16 *pwrL, const s16 *pwrR)
2111 s16 min_pwrL, min_pwrR;
2114 /* Some vendors write the same pcdac value twice !!! */
2115 if (stepL[0] == stepL[1] || stepR[0] == stepR[1])
2116 return max(pwrL[0], pwrR[0]);
2118 if (pwrL[0] == pwrL[1])
2124 tmp = (s8) ath5k_get_interpolated_value(pwr_i,
2126 stepL[0], stepL[1]);
2132 if (pwrR[0] == pwrR[1])
2138 tmp = (s8) ath5k_get_interpolated_value(pwr_i,
2140 stepR[0], stepR[1]);
2146 /* Keep the right boundary so that it works for both curves */
2147 return max(min_pwrL, min_pwrR);
2151 * Interpolate (pwr,vpd) points to create a Power to PDADC or a
2152 * Power to PCDAC curve.
2154 * Each curve has power on x axis (in 0.5dB units) and PCDAC/PDADC
2155 * steps (offsets) on y axis. Power can go up to 31.5dB and max
2156 * PCDAC/PDADC step for each curve is 64 but we can write more than
2157 * one curves on hw so we can go up to 128 (which is the max step we
2158 * can write on the final table).
2160 * We write y values (PCDAC/PDADC steps) on hw.
2163 ath5k_create_power_curve(s16 pmin, s16 pmax,
2164 const s16 *pwr, const u8 *vpd,
2166 u8 *vpd_table, u8 type)
2168 u8 idx[2] = { 0, 1 };
2169 s16 pwr_i = 2 * pmin;
2175 /* We want the whole line, so adjust boundaries
2176 * to cover the entire power range. Note that
2177 * power values are already 0.25dB so no need
2178 * to multiply pwr_i by 2 */
2179 if (type == AR5K_PWRTABLE_LINEAR_PCDAC) {
2185 /* Find surrounding turning points (TPs)
2186 * and interpolate between them */
2187 for (i = 0; (i <= (u16) (pmax - pmin)) &&
2188 (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) {
2190 /* We passed the right TP, move to the next set of TPs
2191 * if we pass the last TP, extrapolate above using the last
2192 * two TPs for ratio */
2193 if ((pwr_i > pwr[idx[1]]) && (idx[1] < num_points - 1)) {
2198 vpd_table[i] = (u8) ath5k_get_interpolated_value(pwr_i,
2199 pwr[idx[0]], pwr[idx[1]],
2200 vpd[idx[0]], vpd[idx[1]]);
2202 /* Increase by 0.5dB
2203 * (0.25 dB units) */
2209 * Get the surrounding per-channel power calibration piers
2210 * for a given frequency so that we can interpolate between
2211 * them and come up with an appropriate dataset for our current
2215 ath5k_get_chan_pcal_surrounding_piers(struct ath5k_hw *ah,
2216 struct ieee80211_channel *channel,
2217 struct ath5k_chan_pcal_info **pcinfo_l,
2218 struct ath5k_chan_pcal_info **pcinfo_r)
2220 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2221 struct ath5k_chan_pcal_info *pcinfo;
2224 u32 target = channel->center_freq;
2229 if (!(channel->hw_value & CHANNEL_OFDM)) {
2230 pcinfo = ee->ee_pwr_cal_b;
2231 mode = AR5K_EEPROM_MODE_11B;
2232 } else if (channel->hw_value & CHANNEL_2GHZ) {
2233 pcinfo = ee->ee_pwr_cal_g;
2234 mode = AR5K_EEPROM_MODE_11G;
2236 pcinfo = ee->ee_pwr_cal_a;
2237 mode = AR5K_EEPROM_MODE_11A;
2239 max = ee->ee_n_piers[mode] - 1;
2241 /* Frequency is below our calibrated
2242 * range. Use the lowest power curve
2244 if (target < pcinfo[0].freq) {
2249 /* Frequency is above our calibrated
2250 * range. Use the highest power curve
2252 if (target > pcinfo[max].freq) {
2253 idx_l = idx_r = max;
2257 /* Frequency is inside our calibrated
2258 * channel range. Pick the surrounding
2259 * calibration piers so that we can
2261 for (i = 0; i <= max; i++) {
2263 /* Frequency matches one of our calibration
2264 * piers, no need to interpolate, just use
2265 * that calibration pier */
2266 if (pcinfo[i].freq == target) {
2271 /* We found a calibration pier that's above
2272 * frequency, use this pier and the previous
2273 * one to interpolate */
2274 if (target < pcinfo[i].freq) {
2282 *pcinfo_l = &pcinfo[idx_l];
2283 *pcinfo_r = &pcinfo[idx_r];
2287 * Get the surrounding per-rate power calibration data
2288 * for a given frequency and interpolate between power
2289 * values to set max target power supported by hw for
2293 ath5k_get_rate_pcal_data(struct ath5k_hw *ah,
2294 struct ieee80211_channel *channel,
2295 struct ath5k_rate_pcal_info *rates)
2297 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2298 struct ath5k_rate_pcal_info *rpinfo;
2301 u32 target = channel->center_freq;
2306 if (!(channel->hw_value & CHANNEL_OFDM)) {
2307 rpinfo = ee->ee_rate_tpwr_b;
2308 mode = AR5K_EEPROM_MODE_11B;
2309 } else if (channel->hw_value & CHANNEL_2GHZ) {
2310 rpinfo = ee->ee_rate_tpwr_g;
2311 mode = AR5K_EEPROM_MODE_11G;
2313 rpinfo = ee->ee_rate_tpwr_a;
2314 mode = AR5K_EEPROM_MODE_11A;
2316 max = ee->ee_rate_target_pwr_num[mode] - 1;
2318 /* Get the surrounding calibration
2319 * piers - same as above */
2320 if (target < rpinfo[0].freq) {
2325 if (target > rpinfo[max].freq) {
2326 idx_l = idx_r = max;
2330 for (i = 0; i <= max; i++) {
2332 if (rpinfo[i].freq == target) {
2337 if (target < rpinfo[i].freq) {
2345 /* Now interpolate power value, based on the frequency */
2346 rates->freq = target;
2348 rates->target_power_6to24 =
2349 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2351 rpinfo[idx_l].target_power_6to24,
2352 rpinfo[idx_r].target_power_6to24);
2354 rates->target_power_36 =
2355 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2357 rpinfo[idx_l].target_power_36,
2358 rpinfo[idx_r].target_power_36);
2360 rates->target_power_48 =
2361 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2363 rpinfo[idx_l].target_power_48,
2364 rpinfo[idx_r].target_power_48);
2366 rates->target_power_54 =
2367 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2369 rpinfo[idx_l].target_power_54,
2370 rpinfo[idx_r].target_power_54);
2374 * Get the max edge power for this channel if
2375 * we have such data from EEPROM's Conformance Test
2376 * Limits (CTL), and limit max power if needed.
2379 ath5k_get_max_ctl_power(struct ath5k_hw *ah,
2380 struct ieee80211_channel *channel)
2382 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
2383 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2384 struct ath5k_edge_power *rep = ee->ee_ctl_pwr;
2385 u8 *ctl_val = ee->ee_ctl;
2386 s16 max_chan_pwr = ah->ah_txpower.txp_max_pwr / 4;
2391 u32 target = channel->center_freq;
2393 ctl_mode = ath_regd_get_band_ctl(regulatory, channel->band);
2395 switch (channel->hw_value & CHANNEL_MODES) {
2397 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
2398 ctl_mode |= AR5K_CTL_TURBO;
2400 ctl_mode |= AR5K_CTL_11A;
2403 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
2404 ctl_mode |= AR5K_CTL_TURBOG;
2406 ctl_mode |= AR5K_CTL_11G;
2409 ctl_mode |= AR5K_CTL_11B;
2415 for (i = 0; i < ee->ee_ctls; i++) {
2416 if (ctl_val[i] == ctl_mode) {
2422 /* If we have a CTL dataset available grab it and find the
2423 * edge power for our frequency */
2424 if (ctl_idx == 0xFF)
2427 /* Edge powers are sorted by frequency from lower
2428 * to higher. Each CTL corresponds to 8 edge power
2430 rep_idx = ctl_idx * AR5K_EEPROM_N_EDGES;
2432 /* Don't do boundaries check because we
2433 * might have more that one bands defined
2436 /* Get the edge power that's closer to our
2438 for (i = 0; i < AR5K_EEPROM_N_EDGES; i++) {
2440 if (target <= rep[rep_idx].freq)
2441 edge_pwr = (s16) rep[rep_idx].edge;
2445 ah->ah_txpower.txp_max_pwr = 4 * min(edge_pwr, max_chan_pwr);
2450 * Power to PCDAC table functions
2454 * Fill Power to PCDAC table on RF5111
2456 * No further processing is needed for RF5111, the only thing we have to
2457 * do is fill the values below and above calibration range since eeprom data
2458 * may not cover the entire PCDAC table.
2461 ath5k_fill_pwr_to_pcdac_table(struct ath5k_hw *ah, s16* table_min,
2464 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2465 u8 *pcdac_tmp = ah->ah_txpower.tmpL[0];
2466 u8 pcdac_0, pcdac_n, pcdac_i, pwr_idx, i;
2467 s16 min_pwr, max_pwr;
2469 /* Get table boundaries */
2470 min_pwr = table_min[0];
2471 pcdac_0 = pcdac_tmp[0];
2473 max_pwr = table_max[0];
2474 pcdac_n = pcdac_tmp[table_max[0] - table_min[0]];
2476 /* Extrapolate below minimum using pcdac_0 */
2478 for (i = 0; i < min_pwr; i++)
2479 pcdac_out[pcdac_i++] = pcdac_0;
2481 /* Copy values from pcdac_tmp */
2483 for (i = 0; pwr_idx <= max_pwr &&
2484 pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE; i++) {
2485 pcdac_out[pcdac_i++] = pcdac_tmp[i];
2489 /* Extrapolate above maximum */
2490 while (pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE)
2491 pcdac_out[pcdac_i++] = pcdac_n;
2496 * Combine available XPD Curves and fill Linear Power to PCDAC table
2499 * RFX112 can have up to 2 curves (one for low txpower range and one for
2500 * higher txpower range). We need to put them both on pcdac_out and place
2501 * them in the correct location. In case we only have one curve available
2502 * just fit it on pcdac_out (it's supposed to cover the entire range of
2503 * available pwr levels since it's always the higher power curve). Extrapolate
2504 * below and above final table if needed.
2507 ath5k_combine_linear_pcdac_curves(struct ath5k_hw *ah, s16* table_min,
2508 s16 *table_max, u8 pdcurves)
2510 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2517 s16 mid_pwr_idx = 0;
2518 /* Edge flag turns on the 7nth bit on the PCDAC
2519 * to declare the higher power curve (force values
2520 * to be greater than 64). If we only have one curve
2521 * we don't need to set this, if we have 2 curves and
2522 * fill the table backwards this can also be used to
2523 * switch from higher power curve to lower power curve */
2527 /* When we have only one curve available
2528 * that's the higher power curve. If we have
2529 * two curves the first is the high power curve
2530 * and the next is the low power curve. */
2532 pcdac_low_pwr = ah->ah_txpower.tmpL[1];
2533 pcdac_high_pwr = ah->ah_txpower.tmpL[0];
2534 mid_pwr_idx = table_max[1] - table_min[1] - 1;
2535 max_pwr_idx = (table_max[0] - table_min[0]) / 2;
2537 /* If table size goes beyond 31.5dB, keep the
2538 * upper 31.5dB range when setting tx power.
2539 * Note: 126 = 31.5 dB in quarter dB steps */
2540 if (table_max[0] - table_min[1] > 126)
2541 min_pwr_idx = table_max[0] - 126;
2543 min_pwr_idx = table_min[1];
2545 /* Since we fill table backwards
2546 * start from high power curve */
2547 pcdac_tmp = pcdac_high_pwr;
2551 pcdac_low_pwr = ah->ah_txpower.tmpL[1]; /* Zeroed */
2552 pcdac_high_pwr = ah->ah_txpower.tmpL[0];
2553 min_pwr_idx = table_min[0];
2554 max_pwr_idx = (table_max[0] - table_min[0]) / 2;
2555 pcdac_tmp = pcdac_high_pwr;
2559 /* This is used when setting tx power*/
2560 ah->ah_txpower.txp_min_idx = min_pwr_idx / 2;
2562 /* Fill Power to PCDAC table backwards */
2564 for (i = 63; i >= 0; i--) {
2565 /* Entering lower power range, reset
2566 * edge flag and set pcdac_tmp to lower
2568 if (edge_flag == 0x40 &&
2569 (2 * pwr <= (table_max[1] - table_min[0]) || pwr == 0)) {
2571 pcdac_tmp = pcdac_low_pwr;
2572 pwr = mid_pwr_idx / 2;
2575 /* Don't go below 1, extrapolate below if we have
2576 * already switched to the lower power curve -or
2577 * we only have one curve and edge_flag is zero
2579 if (pcdac_tmp[pwr] < 1 && (edge_flag == 0x00)) {
2581 pcdac_out[i] = pcdac_out[i + 1];
2587 pcdac_out[i] = pcdac_tmp[pwr] | edge_flag;
2589 /* Extrapolate above if pcdac is greater than
2590 * 126 -this can happen because we OR pcdac_out
2591 * value with edge_flag on high power curve */
2592 if (pcdac_out[i] > 126)
2595 /* Decrease by a 0.5dB step */
2600 /* Write PCDAC values on hw */
2602 ath5k_write_pcdac_table(struct ath5k_hw *ah)
2604 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2608 * Write TX power values
2610 for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
2611 ath5k_hw_reg_write(ah,
2612 (((pcdac_out[2 * i + 0] << 8 | 0xff) & 0xffff) << 0) |
2613 (((pcdac_out[2 * i + 1] << 8 | 0xff) & 0xffff) << 16),
2614 AR5K_PHY_PCDAC_TXPOWER(i));
2620 * Power to PDADC table functions
2624 * Set the gain boundaries and create final Power to PDADC table
2626 * We can have up to 4 pd curves, we need to do a similar process
2627 * as we do for RF5112. This time we don't have an edge_flag but we
2628 * set the gain boundaries on a separate register.
2631 ath5k_combine_pwr_to_pdadc_curves(struct ath5k_hw *ah,
2632 s16 *pwr_min, s16 *pwr_max, u8 pdcurves)
2634 u8 gain_boundaries[AR5K_EEPROM_N_PD_GAINS];
2635 u8 *pdadc_out = ah->ah_txpower.txp_pd_table;
2638 u8 pdadc_i, pdadc_n, pwr_step, pdg, max_idx, table_size;
2641 /* Note: Register value is initialized on initvals
2642 * there is no feedback from hw.
2643 * XXX: What about pd_gain_overlap from EEPROM ? */
2644 pd_gain_overlap = (u8) ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG5) &
2645 AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP;
2647 /* Create final PDADC table */
2648 for (pdg = 0, pdadc_i = 0; pdg < pdcurves; pdg++) {
2649 pdadc_tmp = ah->ah_txpower.tmpL[pdg];
2651 if (pdg == pdcurves - 1)
2652 /* 2 dB boundary stretch for last
2653 * (higher power) curve */
2654 gain_boundaries[pdg] = pwr_max[pdg] + 4;
2656 /* Set gain boundary in the middle
2657 * between this curve and the next one */
2658 gain_boundaries[pdg] =
2659 (pwr_max[pdg] + pwr_min[pdg + 1]) / 2;
2661 /* Sanity check in case our 2 db stretch got out of
2663 if (gain_boundaries[pdg] > AR5K_TUNE_MAX_TXPOWER)
2664 gain_boundaries[pdg] = AR5K_TUNE_MAX_TXPOWER;
2666 /* For the first curve (lower power)
2667 * start from 0 dB */
2671 /* For the other curves use the gain overlap */
2672 pdadc_0 = (gain_boundaries[pdg - 1] - pwr_min[pdg]) -
2675 /* Force each power step to be at least 0.5 dB */
2676 if ((pdadc_tmp[1] - pdadc_tmp[0]) > 1)
2677 pwr_step = pdadc_tmp[1] - pdadc_tmp[0];
2681 /* If pdadc_0 is negative, we need to extrapolate
2682 * below this pdgain by a number of pwr_steps */
2683 while ((pdadc_0 < 0) && (pdadc_i < 128)) {
2684 s16 tmp = pdadc_tmp[0] + pdadc_0 * pwr_step;
2685 pdadc_out[pdadc_i++] = (tmp < 0) ? 0 : (u8) tmp;
2689 /* Set last pwr level, using gain boundaries */
2690 pdadc_n = gain_boundaries[pdg] + pd_gain_overlap - pwr_min[pdg];
2691 /* Limit it to be inside pwr range */
2692 table_size = pwr_max[pdg] - pwr_min[pdg];
2693 max_idx = (pdadc_n < table_size) ? pdadc_n : table_size;
2695 /* Fill pdadc_out table */
2696 while (pdadc_0 < max_idx && pdadc_i < 128)
2697 pdadc_out[pdadc_i++] = pdadc_tmp[pdadc_0++];
2699 /* Need to extrapolate above this pdgain? */
2700 if (pdadc_n <= max_idx)
2703 /* Force each power step to be at least 0.5 dB */
2704 if ((pdadc_tmp[table_size - 1] - pdadc_tmp[table_size - 2]) > 1)
2705 pwr_step = pdadc_tmp[table_size - 1] -
2706 pdadc_tmp[table_size - 2];
2710 /* Extrapolate above */
2711 while ((pdadc_0 < (s16) pdadc_n) &&
2712 (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2)) {
2713 s16 tmp = pdadc_tmp[table_size - 1] +
2714 (pdadc_0 - max_idx) * pwr_step;
2715 pdadc_out[pdadc_i++] = (tmp > 127) ? 127 : (u8) tmp;
2720 while (pdg < AR5K_EEPROM_N_PD_GAINS) {
2721 gain_boundaries[pdg] = gain_boundaries[pdg - 1];
2725 while (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2) {
2726 pdadc_out[pdadc_i] = pdadc_out[pdadc_i - 1];
2730 /* Set gain boundaries */
2731 ath5k_hw_reg_write(ah,
2732 AR5K_REG_SM(pd_gain_overlap,
2733 AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP) |
2734 AR5K_REG_SM(gain_boundaries[0],
2735 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_1) |
2736 AR5K_REG_SM(gain_boundaries[1],
2737 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_2) |
2738 AR5K_REG_SM(gain_boundaries[2],
2739 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_3) |
2740 AR5K_REG_SM(gain_boundaries[3],
2741 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_4),
2744 /* Used for setting rate power table */
2745 ah->ah_txpower.txp_min_idx = pwr_min[0];
2749 /* Write PDADC values on hw */
2751 ath5k_write_pwr_to_pdadc_table(struct ath5k_hw *ah, u8 ee_mode)
2753 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2754 u8 *pdadc_out = ah->ah_txpower.txp_pd_table;
2755 u8 *pdg_to_idx = ee->ee_pdc_to_idx[ee_mode];
2756 u8 pdcurves = ee->ee_pd_gains[ee_mode];
2760 /* Select the right pdgain curves */
2762 /* Clear current settings */
2763 reg = ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG1);
2764 reg &= ~(AR5K_PHY_TPC_RG1_PDGAIN_1 |
2765 AR5K_PHY_TPC_RG1_PDGAIN_2 |
2766 AR5K_PHY_TPC_RG1_PDGAIN_3 |
2767 AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
2770 * Use pd_gains curve from eeprom
2772 * This overrides the default setting from initvals
2773 * in case some vendors (e.g. Zcomax) don't use the default
2774 * curves. If we don't honor their settings we 'll get a
2775 * 5dB (1 * gain overlap ?) drop.
2777 reg |= AR5K_REG_SM(pdcurves, AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
2781 reg |= AR5K_REG_SM(pdg_to_idx[2], AR5K_PHY_TPC_RG1_PDGAIN_3);
2784 reg |= AR5K_REG_SM(pdg_to_idx[1], AR5K_PHY_TPC_RG1_PDGAIN_2);
2787 reg |= AR5K_REG_SM(pdg_to_idx[0], AR5K_PHY_TPC_RG1_PDGAIN_1);
2790 ath5k_hw_reg_write(ah, reg, AR5K_PHY_TPC_RG1);
2793 * Write TX power values
2795 for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
2796 u32 val = get_unaligned_le32(&pdadc_out[4 * i]);
2797 ath5k_hw_reg_write(ah, val, AR5K_PHY_PDADC_TXPOWER(i));
2803 * Common code for PCDAC/PDADC tables
2807 * This is the main function that uses all of the above
2808 * to set PCDAC/PDADC table on hw for the current channel.
2809 * This table is used for tx power calibration on the baseband,
2810 * without it we get weird tx power levels and in some cases
2811 * distorted spectral mask
2814 ath5k_setup_channel_powertable(struct ath5k_hw *ah,
2815 struct ieee80211_channel *channel,
2816 u8 ee_mode, u8 type)
2818 struct ath5k_pdgain_info *pdg_L, *pdg_R;
2819 struct ath5k_chan_pcal_info *pcinfo_L;
2820 struct ath5k_chan_pcal_info *pcinfo_R;
2821 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2822 u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode];
2823 s16 table_min[AR5K_EEPROM_N_PD_GAINS];
2824 s16 table_max[AR5K_EEPROM_N_PD_GAINS];
2827 u32 target = channel->center_freq;
2830 /* Get surrounding freq piers for this channel */
2831 ath5k_get_chan_pcal_surrounding_piers(ah, channel,
2835 /* Loop over pd gain curves on
2836 * surrounding freq piers by index */
2837 for (pdg = 0; pdg < ee->ee_pd_gains[ee_mode]; pdg++) {
2839 /* Fill curves in reverse order
2840 * from lower power (max gain)
2841 * to higher power. Use curve -> idx
2842 * backmapping we did on eeprom init */
2843 u8 idx = pdg_curve_to_idx[pdg];
2845 /* Grab the needed curves by index */
2846 pdg_L = &pcinfo_L->pd_curves[idx];
2847 pdg_R = &pcinfo_R->pd_curves[idx];
2849 /* Initialize the temp tables */
2850 tmpL = ah->ah_txpower.tmpL[pdg];
2851 tmpR = ah->ah_txpower.tmpR[pdg];
2853 /* Set curve's x boundaries and create
2854 * curves so that they cover the same
2855 * range (if we don't do that one table
2856 * will have values on some range and the
2857 * other one won't have any so interpolation
2859 table_min[pdg] = min(pdg_L->pd_pwr[0],
2860 pdg_R->pd_pwr[0]) / 2;
2862 table_max[pdg] = max(pdg_L->pd_pwr[pdg_L->pd_points - 1],
2863 pdg_R->pd_pwr[pdg_R->pd_points - 1]) / 2;
2865 /* Now create the curves on surrounding channels
2866 * and interpolate if needed to get the final
2867 * curve for this gain on this channel */
2869 case AR5K_PWRTABLE_LINEAR_PCDAC:
2870 /* Override min/max so that we don't loose
2871 * accuracy (don't divide by 2) */
2872 table_min[pdg] = min(pdg_L->pd_pwr[0],
2876 max(pdg_L->pd_pwr[pdg_L->pd_points - 1],
2877 pdg_R->pd_pwr[pdg_R->pd_points - 1]);
2879 /* Override minimum so that we don't get
2880 * out of bounds while extrapolating
2881 * below. Don't do this when we have 2
2882 * curves and we are on the high power curve
2883 * because table_min is ok in this case */
2884 if (!(ee->ee_pd_gains[ee_mode] > 1 && pdg == 0)) {
2887 ath5k_get_linear_pcdac_min(pdg_L->pd_step,
2892 /* Don't go too low because we will
2893 * miss the upper part of the curve.
2894 * Note: 126 = 31.5dB (max power supported)
2895 * in 0.25dB units */
2896 if (table_max[pdg] - table_min[pdg] > 126)
2897 table_min[pdg] = table_max[pdg] - 126;
2901 case AR5K_PWRTABLE_PWR_TO_PCDAC:
2902 case AR5K_PWRTABLE_PWR_TO_PDADC:
2904 ath5k_create_power_curve(table_min[pdg],
2908 pdg_L->pd_points, tmpL, type);
2910 /* We are in a calibration
2911 * pier, no need to interpolate
2912 * between freq piers */
2913 if (pcinfo_L == pcinfo_R)
2916 ath5k_create_power_curve(table_min[pdg],
2920 pdg_R->pd_points, tmpR, type);
2926 /* Interpolate between curves
2927 * of surrounding freq piers to
2928 * get the final curve for this
2929 * pd gain. Re-use tmpL for interpolation
2931 for (i = 0; (i < (u16) (table_max[pdg] - table_min[pdg])) &&
2932 (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) {
2933 tmpL[i] = (u8) ath5k_get_interpolated_value(target,
2934 (s16) pcinfo_L->freq,
2935 (s16) pcinfo_R->freq,
2941 /* Now we have a set of curves for this
2942 * channel on tmpL (x range is table_max - table_min
2943 * and y values are tmpL[pdg][]) sorted in the same
2944 * order as EEPROM (because we've used the backmapping).
2945 * So for RF5112 it's from higher power to lower power
2946 * and for RF2413 it's from lower power to higher power.
2947 * For RF5111 we only have one curve. */
2949 /* Fill min and max power levels for this
2950 * channel by interpolating the values on
2951 * surrounding channels to complete the dataset */
2952 ah->ah_txpower.txp_min_pwr = ath5k_get_interpolated_value(target,
2953 (s16) pcinfo_L->freq,
2954 (s16) pcinfo_R->freq,
2955 pcinfo_L->min_pwr, pcinfo_R->min_pwr);
2957 ah->ah_txpower.txp_max_pwr = ath5k_get_interpolated_value(target,
2958 (s16) pcinfo_L->freq,
2959 (s16) pcinfo_R->freq,
2960 pcinfo_L->max_pwr, pcinfo_R->max_pwr);
2962 /* Fill PCDAC/PDADC table */
2964 case AR5K_PWRTABLE_LINEAR_PCDAC:
2965 /* For RF5112 we can have one or two curves
2966 * and each curve covers a certain power lvl
2967 * range so we need to do some more processing */
2968 ath5k_combine_linear_pcdac_curves(ah, table_min, table_max,
2969 ee->ee_pd_gains[ee_mode]);
2971 /* Set txp.offset so that we can
2972 * match max power value with max
2974 ah->ah_txpower.txp_offset = 64 - (table_max[0] / 2);
2976 case AR5K_PWRTABLE_PWR_TO_PCDAC:
2977 /* We are done for RF5111 since it has only
2978 * one curve, just fit the curve on the table */
2979 ath5k_fill_pwr_to_pcdac_table(ah, table_min, table_max);
2981 /* No rate powertable adjustment for RF5111 */
2982 ah->ah_txpower.txp_min_idx = 0;
2983 ah->ah_txpower.txp_offset = 0;
2985 case AR5K_PWRTABLE_PWR_TO_PDADC:
2986 /* Set PDADC boundaries and fill
2987 * final PDADC table */
2988 ath5k_combine_pwr_to_pdadc_curves(ah, table_min, table_max,
2989 ee->ee_pd_gains[ee_mode]);
2991 /* Set txp.offset, note that table_min
2992 * can be negative */
2993 ah->ah_txpower.txp_offset = table_min[0];
2999 ah->ah_txpower.txp_setup = true;
3004 /* Write power table for current channel to hw */
3006 ath5k_write_channel_powertable(struct ath5k_hw *ah, u8 ee_mode, u8 type)
3008 if (type == AR5K_PWRTABLE_PWR_TO_PDADC)
3009 ath5k_write_pwr_to_pdadc_table(ah, ee_mode);
3011 ath5k_write_pcdac_table(ah);
3015 * Per-rate tx power setting
3017 * This is the code that sets the desired tx power (below
3018 * maximum) on hw for each rate (we also have TPC that sets
3019 * power per packet). We do that by providing an index on the
3020 * PCDAC/PDADC table we set up.
3024 * Set rate power table
3026 * For now we only limit txpower based on maximum tx power
3027 * supported by hw (what's inside rate_info). We need to limit
3028 * this even more, based on regulatory domain etc.
3030 * Rate power table contains indices to PCDAC/PDADC table (0.5dB steps)
3031 * and is indexed as follows:
3032 * rates[0] - rates[7] -> OFDM rates
3033 * rates[8] - rates[14] -> CCK rates
3034 * rates[15] -> XR rates (they all have the same power)
3037 ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr,
3038 struct ath5k_rate_pcal_info *rate_info,
3044 /* max_pwr is power level we got from driver/user in 0.5dB
3045 * units, switch to 0.25dB units so we can compare */
3047 max_pwr = min(max_pwr, (u16) ah->ah_txpower.txp_max_pwr) / 2;
3049 /* apply rate limits */
3050 rates = ah->ah_txpower.txp_rates_power_table;
3052 /* OFDM rates 6 to 24Mb/s */
3053 for (i = 0; i < 5; i++)
3054 rates[i] = min(max_pwr, rate_info->target_power_6to24);
3056 /* Rest OFDM rates */
3057 rates[5] = min(rates[0], rate_info->target_power_36);
3058 rates[6] = min(rates[0], rate_info->target_power_48);
3059 rates[7] = min(rates[0], rate_info->target_power_54);
3063 rates[8] = min(rates[0], rate_info->target_power_6to24);
3065 rates[9] = min(rates[0], rate_info->target_power_36);
3067 rates[10] = min(rates[0], rate_info->target_power_36);
3069 rates[11] = min(rates[0], rate_info->target_power_48);
3071 rates[12] = min(rates[0], rate_info->target_power_48);
3073 rates[13] = min(rates[0], rate_info->target_power_54);
3075 rates[14] = min(rates[0], rate_info->target_power_54);
3078 rates[15] = min(rates[0], rate_info->target_power_6to24);
3080 /* CCK rates have different peak to average ratio
3081 * so we have to tweak their power so that gainf
3082 * correction works ok. For this we use OFDM to
3083 * CCK delta from eeprom */
3084 if ((ee_mode == AR5K_EEPROM_MODE_11G) &&
3085 (ah->ah_phy_revision < AR5K_SREV_PHY_5212A))
3086 for (i = 8; i <= 15; i++)
3087 rates[i] -= ah->ah_txpower.txp_cck_ofdm_gainf_delta;
3089 /* Now that we have all rates setup use table offset to
3090 * match the power range set by user with the power indices
3091 * on PCDAC/PDADC table */
3092 for (i = 0; i < 16; i++) {
3093 rates[i] += ah->ah_txpower.txp_offset;
3094 /* Don't get out of bounds */
3099 /* Min/max in 0.25dB units */
3100 ah->ah_txpower.txp_min_pwr = 2 * rates[7];
3101 ah->ah_txpower.txp_cur_pwr = 2 * rates[0];
3102 ah->ah_txpower.txp_ofdm = rates[7];
3107 * Set transmission power
3110 ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
3113 struct ath5k_rate_pcal_info rate_info;
3114 struct ieee80211_channel *curr_channel = ah->ah_current_channel;
3119 if (txpower > AR5K_TUNE_MAX_TXPOWER) {
3120 ATH5K_ERR(ah, "invalid tx power: %u\n", txpower);
3124 ee_mode = ath5k_eeprom_mode_from_channel(channel);
3127 "invalid channel: %d\n", channel->center_freq);
3131 /* Initialize TX power table */
3132 switch (ah->ah_radio) {
3137 type = AR5K_PWRTABLE_PWR_TO_PCDAC;
3140 type = AR5K_PWRTABLE_LINEAR_PCDAC;
3147 type = AR5K_PWRTABLE_PWR_TO_PDADC;
3154 * If we don't change channel/mode skip tx powertable calculation
3155 * and use the cached one.
3157 if (!ah->ah_txpower.txp_setup ||
3158 (channel->hw_value != curr_channel->hw_value) ||
3159 (channel->center_freq != curr_channel->center_freq)) {
3160 /* Reset TX power values */
3161 memset(&ah->ah_txpower, 0, sizeof(ah->ah_txpower));
3162 ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER;
3164 /* Calculate the powertable */
3165 ret = ath5k_setup_channel_powertable(ah, channel,
3171 /* Write table on hw */
3172 ath5k_write_channel_powertable(ah, ee_mode, type);
3174 /* Limit max power if we have a CTL available */
3175 ath5k_get_max_ctl_power(ah, channel);
3177 /* FIXME: Antenna reduction stuff */
3179 /* FIXME: Limit power on turbo modes */
3181 /* FIXME: TPC scale reduction */
3183 /* Get surrounding channels for per-rate power table
3185 ath5k_get_rate_pcal_data(ah, channel, &rate_info);
3187 /* Setup rate power table */
3188 ath5k_setup_rate_powertable(ah, txpower, &rate_info, ee_mode);
3190 /* Write rate power table on hw */
3191 ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(3, 24) |
3192 AR5K_TXPOWER_OFDM(2, 16) | AR5K_TXPOWER_OFDM(1, 8) |
3193 AR5K_TXPOWER_OFDM(0, 0), AR5K_PHY_TXPOWER_RATE1);
3195 ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(7, 24) |
3196 AR5K_TXPOWER_OFDM(6, 16) | AR5K_TXPOWER_OFDM(5, 8) |
3197 AR5K_TXPOWER_OFDM(4, 0), AR5K_PHY_TXPOWER_RATE2);
3199 ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(10, 24) |
3200 AR5K_TXPOWER_CCK(9, 16) | AR5K_TXPOWER_CCK(15, 8) |
3201 AR5K_TXPOWER_CCK(8, 0), AR5K_PHY_TXPOWER_RATE3);
3203 ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(14, 24) |
3204 AR5K_TXPOWER_CCK(13, 16) | AR5K_TXPOWER_CCK(12, 8) |
3205 AR5K_TXPOWER_CCK(11, 0), AR5K_PHY_TXPOWER_RATE4);
3207 /* FIXME: TPC support */
3208 if (ah->ah_txpower.txp_tpc) {
3209 ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX_TPC_ENABLE |
3210 AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
3212 ath5k_hw_reg_write(ah,
3213 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_ACK) |
3214 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CTS) |
3215 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CHIRP),
3218 ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX |
3219 AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
3225 int ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, u8 txpower)
3227 ATH5K_DBG(ah, ATH5K_DEBUG_TXPOWER,
3228 "changing txpower to %d\n", txpower);
3230 return ath5k_hw_txpower(ah, ah->ah_current_channel, txpower);
3237 int ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
3240 struct ieee80211_channel *curr_channel;
3246 * Sanity check for fast flag
3247 * Don't try fast channel change when changing modulation
3248 * mode/band. We check for chip compatibility on
3251 curr_channel = ah->ah_current_channel;
3252 if (fast && (channel->hw_value != curr_channel->hw_value))
3256 * On fast channel change we only set the synth parameters
3257 * while PHY is running, enable calibration and skip the rest.
3260 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_RFBUS_REQ,
3261 AR5K_PHY_RFBUS_REQ_REQUEST);
3262 for (i = 0; i < 100; i++) {
3263 if (ath5k_hw_reg_read(ah, AR5K_PHY_RFBUS_GRANT))
3271 /* Set channel and wait for synth */
3272 ret = ath5k_hw_channel(ah, channel);
3276 ath5k_hw_wait_for_synth(ah, channel);
3282 * Note: We need to do that before we set
3283 * RF buffer settings on 5211/5212+ so that we
3284 * properly set curve indices.
3286 ret = ath5k_hw_txpower(ah, channel, ah->ah_txpower.txp_cur_pwr ?
3287 ah->ah_txpower.txp_cur_pwr / 2 : AR5K_TUNE_MAX_TXPOWER);
3291 /* Write OFDM timings on 5212*/
3292 if (ah->ah_version == AR5K_AR5212 &&
3293 channel->hw_value & CHANNEL_OFDM) {
3295 ret = ath5k_hw_write_ofdm_timings(ah, channel);
3299 /* Spur info is available only from EEPROM versions
3300 * greater than 5.3, but the EEPROM routines will use
3301 * static values for older versions */
3302 if (ah->ah_mac_srev >= AR5K_SREV_AR5424)
3303 ath5k_hw_set_spur_mitigation_filter(ah,
3307 /* If we used fast channel switching
3308 * we are done, release RF bus and
3309 * fire up NF calibration.
3311 * Note: Only NF calibration due to
3312 * channel change, not AGC calibration
3313 * since AGC is still running !
3317 * Release RF Bus grant
3319 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_RFBUS_REQ,
3320 AR5K_PHY_RFBUS_REQ_REQUEST);
3323 * Start NF calibration
3325 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
3326 AR5K_PHY_AGCCTL_NF);
3332 * For 5210 we do all initialization using
3333 * initvals, so we don't have to modify
3334 * any settings (5210 also only supports
3337 if (ah->ah_version != AR5K_AR5210) {
3340 * Write initial RF gain settings
3341 * This should work for both 5111/5112
3343 ret = ath5k_hw_rfgain_init(ah, channel->band);
3352 ret = ath5k_hw_rfregs_init(ah, channel, mode);
3356 /*Enable/disable 802.11b mode on 5111
3357 (enable 2111 frequency converter + CCK)*/
3358 if (ah->ah_radio == AR5K_RF5111) {
3359 if (mode == AR5K_MODE_11B)
3360 AR5K_REG_ENABLE_BITS(ah, AR5K_TXCFG,
3363 AR5K_REG_DISABLE_BITS(ah, AR5K_TXCFG,
3367 } else if (ah->ah_version == AR5K_AR5210) {
3369 /* Disable phy and wait */
3370 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT);
3374 /* Set channel on PHY */
3375 ret = ath5k_hw_channel(ah, channel);
3380 * Enable the PHY and wait until completion
3381 * This includes BaseBand and Synthesizer
3384 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
3386 ath5k_hw_wait_for_synth(ah, channel);
3389 * Perform ADC test to see if baseband is ready
3390 * Set tx hold and check adc test register
3392 phy_tst1 = ath5k_hw_reg_read(ah, AR5K_PHY_TST1);
3393 ath5k_hw_reg_write(ah, AR5K_PHY_TST1_TXHOLD, AR5K_PHY_TST1);
3394 for (i = 0; i <= 20; i++) {
3395 if (!(ath5k_hw_reg_read(ah, AR5K_PHY_ADC_TEST) & 0x10))
3399 ath5k_hw_reg_write(ah, phy_tst1, AR5K_PHY_TST1);
3402 * Start automatic gain control calibration
3404 * During AGC calibration RX path is re-routed to
3405 * a power detector so we don't receive anything.
3407 * This method is used to calibrate some static offsets
3408 * used together with on-the fly I/Q calibration (the
3409 * one performed via ath5k_hw_phy_calibrate), which doesn't
3410 * interrupt rx path.
3412 * While rx path is re-routed to the power detector we also
3413 * start a noise floor calibration to measure the
3414 * card's noise floor (the noise we measure when we are not
3415 * transmitting or receiving anything).
3417 * If we are in a noisy environment, AGC calibration may time
3418 * out and/or noise floor calibration might timeout.
3420 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
3421 AR5K_PHY_AGCCTL_CAL | AR5K_PHY_AGCCTL_NF);
3423 /* At the same time start I/Q calibration for QAM constellation
3424 * -no need for CCK- */
3425 ah->ah_calibration = false;
3426 if (!(mode == AR5K_MODE_11B)) {
3427 ah->ah_calibration = true;
3428 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
3429 AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
3430 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
3434 /* Wait for gain calibration to finish (we check for I/Q calibration
3435 * during ath5k_phy_calibrate) */
3436 if (ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
3437 AR5K_PHY_AGCCTL_CAL, 0, false)) {
3438 ATH5K_ERR(ah, "gain calibration timeout (%uMHz)\n",
3439 channel->center_freq);
3442 /* Restore antenna mode */
3443 ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode);