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>
38 * Get the PHY Chip revision
40 u16 ath5k_hw_radio_revision(struct ath5k_hw *ah, unsigned int chan)
47 * Set the radio chip access register
51 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_2GHZ, AR5K_PHY(0));
54 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
62 /* ...wait until PHY is ready and read the selected radio revision */
63 ath5k_hw_reg_write(ah, 0x00001c16, AR5K_PHY(0x34));
65 for (i = 0; i < 8; i++)
66 ath5k_hw_reg_write(ah, 0x00010000, AR5K_PHY(0x20));
68 if (ah->ah_version == AR5K_AR5210) {
69 srev = ath5k_hw_reg_read(ah, AR5K_PHY(256) >> 28) & 0xf;
70 ret = (u16)ath5k_hw_bitswap(srev, 4) + 1;
72 srev = (ath5k_hw_reg_read(ah, AR5K_PHY(0x100)) >> 24) & 0xff;
73 ret = (u16)ath5k_hw_bitswap(((srev & 0xf0) >> 4) |
74 ((srev & 0x0f) << 4), 8);
77 /* Reset to the 5GHz mode */
78 ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
84 * Check if a channel is supported
86 bool ath5k_channel_ok(struct ath5k_hw *ah, u16 freq, unsigned int flags)
88 /* Check if the channel is in our supported range */
89 if (flags & CHANNEL_2GHZ) {
90 if ((freq >= ah->ah_capabilities.cap_range.range_2ghz_min) &&
91 (freq <= ah->ah_capabilities.cap_range.range_2ghz_max))
93 } else if (flags & CHANNEL_5GHZ)
94 if ((freq >= ah->ah_capabilities.cap_range.range_5ghz_min) &&
95 (freq <= ah->ah_capabilities.cap_range.range_5ghz_max))
101 bool ath5k_hw_chan_has_spur_noise(struct ath5k_hw *ah,
102 struct ieee80211_channel *channel)
106 if ((ah->ah_radio == AR5K_RF5112) ||
107 (ah->ah_radio == AR5K_RF5413) ||
108 (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4)))
113 if ((channel->center_freq % refclk_freq != 0) &&
114 ((channel->center_freq % refclk_freq < 10) ||
115 (channel->center_freq % refclk_freq > 22)))
122 * Used to modify RF Banks before writing them to AR5K_RF_BUFFER
124 static unsigned int ath5k_hw_rfb_op(struct ath5k_hw *ah,
125 const struct ath5k_rf_reg *rf_regs,
126 u32 val, u8 reg_id, bool set)
128 const struct ath5k_rf_reg *rfreg = NULL;
129 u8 offset, bank, num_bits, col, position;
131 u32 mask, data, last_bit, bits_shifted, first_bit;
137 rfb = ah->ah_rf_banks;
139 for (i = 0; i < ah->ah_rf_regs_count; i++) {
140 if (rf_regs[i].index == reg_id) {
146 if (rfb == NULL || rfreg == NULL) {
147 ATH5K_PRINTF("Rf register not found!\n");
148 /* should not happen */
153 num_bits = rfreg->field.len;
154 first_bit = rfreg->field.pos;
155 col = rfreg->field.col;
157 /* first_bit is an offset from bank's
158 * start. Since we have all banks on
159 * the same array, we use this offset
160 * to mark each bank's start */
161 offset = ah->ah_offset[bank];
164 if (!(col <= 3 && num_bits <= 32 && first_bit + num_bits <= 319)) {
165 ATH5K_PRINTF("invalid values at offset %u\n", offset);
169 entry = ((first_bit - 1) / 8) + offset;
170 position = (first_bit - 1) % 8;
173 data = ath5k_hw_bitswap(val, num_bits);
175 for (bits_shifted = 0, bits_left = num_bits; bits_left > 0;
176 position = 0, entry++) {
178 last_bit = (position + bits_left > 8) ? 8 :
179 position + bits_left;
181 mask = (((1 << last_bit) - 1) ^ ((1 << position) - 1)) <<
186 rfb[entry] |= ((data << position) << (col * 8)) & mask;
187 data >>= (8 - position);
189 data |= (((rfb[entry] & mask) >> (col * 8)) >> position)
191 bits_shifted += last_bit - position;
194 bits_left -= 8 - position;
197 data = set ? 1 : ath5k_hw_bitswap(data, num_bits);
203 * ath5k_hw_write_ofdm_timings - set OFDM timings on AR5212
205 * @ah: the &struct ath5k_hw
206 * @channel: the currently set channel upon reset
208 * Write the delta slope coefficient (used on pilot tracking ?) for OFDM
209 * operation on the AR5212 upon reset. This is a helper for ath5k_hw_phy_init.
211 * Since delta slope is floating point we split it on its exponent and
212 * mantissa and provide these values on hw.
214 * For more infos i think this patent is related
215 * http://www.freepatentsonline.com/7184495.html
217 static inline int ath5k_hw_write_ofdm_timings(struct ath5k_hw *ah,
218 struct ieee80211_channel *channel)
220 /* Get exponent and mantissa and set it */
221 u32 coef_scaled, coef_exp, coef_man,
222 ds_coef_exp, ds_coef_man, clock;
224 BUG_ON(!(ah->ah_version == AR5K_AR5212) ||
225 !(channel->hw_value & CHANNEL_OFDM));
228 * ALGO: coef = (5 * clock / carrier_freq) / 2
229 * we scale coef by shifting clock value by 24 for
230 * better precision since we use integers */
231 /* TODO: Half/quarter rate */
232 clock = (channel->hw_value & CHANNEL_TURBO) ? 80 : 40;
233 coef_scaled = ((5 * (clock << 24)) / 2) / channel->center_freq;
236 * ALGO: coef_exp = 14 - highest set bit position */
237 coef_exp = ilog2(coef_scaled);
239 /* Doesn't make sense if it's zero*/
240 if (!coef_scaled || !coef_exp)
243 /* Note: we've shifted coef_scaled by 24 */
244 coef_exp = 14 - (coef_exp - 24);
247 /* Get mantissa (significant digits)
248 * ALGO: coef_mant = floor(coef_scaled* 2^coef_exp+0.5) */
249 coef_man = coef_scaled +
250 (1 << (24 - coef_exp - 1));
252 /* Calculate delta slope coefficient exponent
253 * and mantissa (remove scaling) and set them on hw */
254 ds_coef_man = coef_man >> (24 - coef_exp);
255 ds_coef_exp = coef_exp - 16;
257 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_3,
258 AR5K_PHY_TIMING_3_DSC_MAN, ds_coef_man);
259 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_3,
260 AR5K_PHY_TIMING_3_DSC_EXP, ds_coef_exp);
265 int ath5k_hw_phy_disable(struct ath5k_hw *ah)
268 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT);
274 /**********************\
275 * RF Gain optimization *
276 \**********************/
279 * This code is used to optimize RF gain on different environments
280 * (temperature mostly) based on feedback from a power detector.
282 * It's only used on RF5111 and RF5112, later RF chips seem to have
283 * auto adjustment on hw -notice they have a much smaller BANK 7 and
284 * no gain optimization ladder-.
286 * For more infos check out this patent doc
287 * http://www.freepatentsonline.com/7400691.html
289 * This paper describes power drops as seen on the receiver due to
291 * http://www.cnri.dit.ie/publications/ICT08%20-%20Practical%20Issues
292 * %20of%20Power%20Control.pdf
294 * And this is the MadWiFi bug entry related to the above
295 * http://madwifi-project.org/ticket/1659
296 * with various measurements and diagrams
298 * TODO: Deal with power drops due to probes by setting an apropriate
299 * tx power on the probe packets ! Make this part of the calibration process.
302 /* Initialize ah_gain durring attach */
303 int ath5k_hw_rfgain_opt_init(struct ath5k_hw *ah)
305 /* Initialize the gain optimization values */
306 switch (ah->ah_radio) {
308 ah->ah_gain.g_step_idx = rfgain_opt_5111.go_default;
309 ah->ah_gain.g_low = 20;
310 ah->ah_gain.g_high = 35;
311 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
314 ah->ah_gain.g_step_idx = rfgain_opt_5112.go_default;
315 ah->ah_gain.g_low = 20;
316 ah->ah_gain.g_high = 85;
317 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
326 /* Schedule a gain probe check on the next transmited packet.
327 * That means our next packet is going to be sent with lower
328 * tx power and a Peak to Average Power Detector (PAPD) will try
329 * to measure the gain.
331 * XXX: How about forcing a tx packet (bypassing PCU arbitrator etc)
332 * just after we enable the probe so that we don't mess with
333 * standard traffic ? Maybe it's time to use sw interrupts and
334 * a probe tasklet !!!
336 static void ath5k_hw_request_rfgain_probe(struct ath5k_hw *ah)
339 /* Skip if gain calibration is inactive or
340 * we already handle a probe request */
341 if (ah->ah_gain.g_state != AR5K_RFGAIN_ACTIVE)
344 /* Send the packet with 2dB below max power as
345 * patent doc suggest */
346 ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txpower.txp_ofdm - 4,
347 AR5K_PHY_PAPD_PROBE_TXPOWER) |
348 AR5K_PHY_PAPD_PROBE_TX_NEXT, AR5K_PHY_PAPD_PROBE);
350 ah->ah_gain.g_state = AR5K_RFGAIN_READ_REQUESTED;
354 /* Calculate gain_F measurement correction
355 * based on the current step for RF5112 rev. 2 */
356 static u32 ath5k_hw_rf_gainf_corr(struct ath5k_hw *ah)
360 const struct ath5k_gain_opt *go;
361 const struct ath5k_gain_opt_step *g_step;
362 const struct ath5k_rf_reg *rf_regs;
364 /* Only RF5112 Rev. 2 supports it */
365 if ((ah->ah_radio != AR5K_RF5112) ||
366 (ah->ah_radio_5ghz_revision <= AR5K_SREV_RAD_5112A))
369 go = &rfgain_opt_5112;
370 rf_regs = rf_regs_5112a;
371 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112a);
373 g_step = &go->go_step[ah->ah_gain.g_step_idx];
375 if (ah->ah_rf_banks == NULL)
378 rf = ah->ah_rf_banks;
379 ah->ah_gain.g_f_corr = 0;
381 /* No VGA (Variable Gain Amplifier) override, skip */
382 if (ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXVGA_OVR, false) != 1)
385 /* Mix gain stepping */
386 step = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXGAIN_STEP, false);
388 /* Mix gain override */
389 mix = g_step->gos_param[0];
393 ah->ah_gain.g_f_corr = step * 2;
396 ah->ah_gain.g_f_corr = (step - 5) * 2;
399 ah->ah_gain.g_f_corr = step;
402 ah->ah_gain.g_f_corr = 0;
406 return ah->ah_gain.g_f_corr;
409 /* Check if current gain_F measurement is in the range of our
410 * power detector windows. If we get a measurement outside range
411 * we know it's not accurate (detectors can't measure anything outside
412 * their detection window) so we must ignore it */
413 static bool ath5k_hw_rf_check_gainf_readback(struct ath5k_hw *ah)
415 const struct ath5k_rf_reg *rf_regs;
416 u32 step, mix_ovr, level[4];
419 if (ah->ah_rf_banks == NULL)
422 rf = ah->ah_rf_banks;
424 if (ah->ah_radio == AR5K_RF5111) {
426 rf_regs = rf_regs_5111;
427 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5111);
429 step = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_RFGAIN_STEP,
433 level[1] = (step == 63) ? 50 : step + 4;
434 level[2] = (step != 63) ? 64 : level[0];
435 level[3] = level[2] + 50 ;
437 ah->ah_gain.g_high = level[3] -
438 (step == 63 ? AR5K_GAIN_DYN_ADJUST_HI_MARGIN : -5);
439 ah->ah_gain.g_low = level[0] +
440 (step == 63 ? AR5K_GAIN_DYN_ADJUST_LO_MARGIN : 0);
443 rf_regs = rf_regs_5112;
444 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112);
446 mix_ovr = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXVGA_OVR,
449 level[0] = level[2] = 0;
452 level[1] = level[3] = 83;
454 level[1] = level[3] = 107;
455 ah->ah_gain.g_high = 55;
459 return (ah->ah_gain.g_current >= level[0] &&
460 ah->ah_gain.g_current <= level[1]) ||
461 (ah->ah_gain.g_current >= level[2] &&
462 ah->ah_gain.g_current <= level[3]);
465 /* Perform gain_F adjustment by choosing the right set
466 * of parameters from RF gain optimization ladder */
467 static s8 ath5k_hw_rf_gainf_adjust(struct ath5k_hw *ah)
469 const struct ath5k_gain_opt *go;
470 const struct ath5k_gain_opt_step *g_step;
473 switch (ah->ah_radio) {
475 go = &rfgain_opt_5111;
478 go = &rfgain_opt_5112;
484 g_step = &go->go_step[ah->ah_gain.g_step_idx];
486 if (ah->ah_gain.g_current >= ah->ah_gain.g_high) {
488 /* Reached maximum */
489 if (ah->ah_gain.g_step_idx == 0)
492 for (ah->ah_gain.g_target = ah->ah_gain.g_current;
493 ah->ah_gain.g_target >= ah->ah_gain.g_high &&
494 ah->ah_gain.g_step_idx > 0;
495 g_step = &go->go_step[ah->ah_gain.g_step_idx])
496 ah->ah_gain.g_target -= 2 *
497 (go->go_step[--(ah->ah_gain.g_step_idx)].gos_gain -
504 if (ah->ah_gain.g_current <= ah->ah_gain.g_low) {
506 /* Reached minimum */
507 if (ah->ah_gain.g_step_idx == (go->go_steps_count - 1))
510 for (ah->ah_gain.g_target = ah->ah_gain.g_current;
511 ah->ah_gain.g_target <= ah->ah_gain.g_low &&
512 ah->ah_gain.g_step_idx < go->go_steps_count-1;
513 g_step = &go->go_step[ah->ah_gain.g_step_idx])
514 ah->ah_gain.g_target -= 2 *
515 (go->go_step[++ah->ah_gain.g_step_idx].gos_gain -
523 ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
524 "ret %d, gain step %u, current gain %u, target gain %u\n",
525 ret, ah->ah_gain.g_step_idx, ah->ah_gain.g_current,
526 ah->ah_gain.g_target);
531 /* Main callback for thermal RF gain calibration engine
532 * Check for a new gain reading and schedule an adjustment
535 * TODO: Use sw interrupt to schedule reset if gain_F needs
537 enum ath5k_rfgain ath5k_hw_gainf_calibrate(struct ath5k_hw *ah)
540 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
542 if (ah->ah_rf_banks == NULL ||
543 ah->ah_gain.g_state == AR5K_RFGAIN_INACTIVE)
544 return AR5K_RFGAIN_INACTIVE;
546 /* No check requested, either engine is inactive
547 * or an adjustment is already requested */
548 if (ah->ah_gain.g_state != AR5K_RFGAIN_READ_REQUESTED)
551 /* Read the PAPD (Peak to Average Power Detector)
553 data = ath5k_hw_reg_read(ah, AR5K_PHY_PAPD_PROBE);
555 /* No probe is scheduled, read gain_F measurement */
556 if (!(data & AR5K_PHY_PAPD_PROBE_TX_NEXT)) {
557 ah->ah_gain.g_current = data >> AR5K_PHY_PAPD_PROBE_GAINF_S;
558 type = AR5K_REG_MS(data, AR5K_PHY_PAPD_PROBE_TYPE);
560 /* If tx packet is CCK correct the gain_F measurement
561 * by cck ofdm gain delta */
562 if (type == AR5K_PHY_PAPD_PROBE_TYPE_CCK) {
563 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A)
564 ah->ah_gain.g_current +=
565 ee->ee_cck_ofdm_gain_delta;
567 ah->ah_gain.g_current +=
568 AR5K_GAIN_CCK_PROBE_CORR;
571 /* Further correct gain_F measurement for
573 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) {
574 ath5k_hw_rf_gainf_corr(ah);
575 ah->ah_gain.g_current =
576 ah->ah_gain.g_current >= ah->ah_gain.g_f_corr ?
577 (ah->ah_gain.g_current-ah->ah_gain.g_f_corr) :
581 /* Check if measurement is ok and if we need
582 * to adjust gain, schedule a gain adjustment,
583 * else switch back to the acive state */
584 if (ath5k_hw_rf_check_gainf_readback(ah) &&
585 AR5K_GAIN_CHECK_ADJUST(&ah->ah_gain) &&
586 ath5k_hw_rf_gainf_adjust(ah)) {
587 ah->ah_gain.g_state = AR5K_RFGAIN_NEED_CHANGE;
589 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
594 return ah->ah_gain.g_state;
597 /* Write initial RF gain table to set the RF sensitivity
598 * this one works on all RF chips and has nothing to do
599 * with gain_F calibration */
600 static int ath5k_hw_rfgain_init(struct ath5k_hw *ah, unsigned int freq)
602 const struct ath5k_ini_rfgain *ath5k_rfg;
603 unsigned int i, size;
605 switch (ah->ah_radio) {
607 ath5k_rfg = rfgain_5111;
608 size = ARRAY_SIZE(rfgain_5111);
611 ath5k_rfg = rfgain_5112;
612 size = ARRAY_SIZE(rfgain_5112);
615 ath5k_rfg = rfgain_2413;
616 size = ARRAY_SIZE(rfgain_2413);
619 ath5k_rfg = rfgain_2316;
620 size = ARRAY_SIZE(rfgain_2316);
623 ath5k_rfg = rfgain_5413;
624 size = ARRAY_SIZE(rfgain_5413);
628 ath5k_rfg = rfgain_2425;
629 size = ARRAY_SIZE(rfgain_2425);
636 case AR5K_INI_RFGAIN_2GHZ:
637 case AR5K_INI_RFGAIN_5GHZ:
643 for (i = 0; i < size; i++) {
645 ath5k_hw_reg_write(ah, ath5k_rfg[i].rfg_value[freq],
646 (u32)ath5k_rfg[i].rfg_register);
654 /********************\
655 * RF Registers setup *
656 \********************/
659 * Setup RF registers by writing RF buffer on hw
661 static int ath5k_hw_rfregs_init(struct ath5k_hw *ah,
662 struct ieee80211_channel *channel, unsigned int mode)
664 const struct ath5k_rf_reg *rf_regs;
665 const struct ath5k_ini_rfbuffer *ini_rfb;
666 const struct ath5k_gain_opt *go = NULL;
667 const struct ath5k_gain_opt_step *g_step;
668 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
671 int i, obdb = -1, bank = -1;
673 switch (ah->ah_radio) {
675 rf_regs = rf_regs_5111;
676 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5111);
678 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5111);
679 go = &rfgain_opt_5111;
682 if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) {
683 rf_regs = rf_regs_5112a;
684 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112a);
686 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5112a);
688 rf_regs = rf_regs_5112;
689 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112);
691 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5112);
693 go = &rfgain_opt_5112;
696 rf_regs = rf_regs_2413;
697 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2413);
699 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2413);
702 rf_regs = rf_regs_2316;
703 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2316);
705 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2316);
708 rf_regs = rf_regs_5413;
709 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5413);
711 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5413);
714 rf_regs = rf_regs_2425;
715 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2425);
717 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2317);
720 rf_regs = rf_regs_2425;
721 ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2425);
722 if (ah->ah_mac_srev < AR5K_SREV_AR2417) {
724 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2425);
727 ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2417);
734 /* If it's the first time we set RF buffer, allocate
735 * ah->ah_rf_banks based on ah->ah_rf_banks_size
737 if (ah->ah_rf_banks == NULL) {
738 ah->ah_rf_banks = kmalloc(sizeof(u32) * ah->ah_rf_banks_size,
740 if (ah->ah_rf_banks == NULL) {
741 ATH5K_ERR(ah->ah_sc, "out of memory\n");
746 /* Copy values to modify them */
747 rfb = ah->ah_rf_banks;
749 for (i = 0; i < ah->ah_rf_banks_size; i++) {
750 if (ini_rfb[i].rfb_bank >= AR5K_MAX_RF_BANKS) {
751 ATH5K_ERR(ah->ah_sc, "invalid bank\n");
755 /* Bank changed, write down the offset */
756 if (bank != ini_rfb[i].rfb_bank) {
757 bank = ini_rfb[i].rfb_bank;
758 ah->ah_offset[bank] = i;
761 rfb[i] = ini_rfb[i].rfb_mode_data[mode];
764 /* Set Output and Driver bias current (OB/DB) */
765 if (channel->hw_value & CHANNEL_2GHZ) {
767 if (channel->hw_value & CHANNEL_CCK)
768 ee_mode = AR5K_EEPROM_MODE_11B;
770 ee_mode = AR5K_EEPROM_MODE_11G;
772 /* For RF511X/RF211X combination we
773 * use b_OB and b_DB parameters stored
774 * in eeprom on ee->ee_ob[ee_mode][0]
776 * For all other chips we use OB/DB for 2Ghz
777 * stored in the b/g modal section just like
778 * 802.11a on ee->ee_ob[ee_mode][1] */
779 if ((ah->ah_radio == AR5K_RF5111) ||
780 (ah->ah_radio == AR5K_RF5112))
785 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb],
786 AR5K_RF_OB_2GHZ, true);
788 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb],
789 AR5K_RF_DB_2GHZ, true);
791 /* RF5111 always needs OB/DB for 5GHz, even if we use 2GHz */
792 } else if ((channel->hw_value & CHANNEL_5GHZ) ||
793 (ah->ah_radio == AR5K_RF5111)) {
795 /* For 11a, Turbo and XR we need to choose
796 * OB/DB based on frequency range */
797 ee_mode = AR5K_EEPROM_MODE_11A;
798 obdb = channel->center_freq >= 5725 ? 3 :
799 (channel->center_freq >= 5500 ? 2 :
800 (channel->center_freq >= 5260 ? 1 :
801 (channel->center_freq > 4000 ? 0 : -1)));
806 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb],
807 AR5K_RF_OB_5GHZ, true);
809 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb],
810 AR5K_RF_DB_5GHZ, true);
813 g_step = &go->go_step[ah->ah_gain.g_step_idx];
815 /* Bank Modifications (chip-specific) */
816 if (ah->ah_radio == AR5K_RF5111) {
818 /* Set gain_F settings according to current step */
819 if (channel->hw_value & CHANNEL_OFDM) {
821 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_FRAME_CTL,
822 AR5K_PHY_FRAME_CTL_TX_CLIP,
823 g_step->gos_param[0]);
825 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1],
826 AR5K_RF_PWD_90, true);
828 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2],
829 AR5K_RF_PWD_84, true);
831 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3],
832 AR5K_RF_RFGAIN_SEL, true);
834 /* We programmed gain_F parameters, switch back
836 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
842 ath5k_hw_rfb_op(ah, rf_regs, !ee->ee_xpd[ee_mode],
843 AR5K_RF_PWD_XPD, true);
845 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_x_gain[ee_mode],
846 AR5K_RF_XPD_GAIN, true);
848 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode],
849 AR5K_RF_GAIN_I, true);
851 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode],
852 AR5K_RF_PLO_SEL, true);
854 /* Tweak power detectors for half/quarter rate support */
855 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ ||
856 ah->ah_bwmode == AR5K_BWMODE_10MHZ) {
859 ath5k_hw_rfb_op(ah, rf_regs, 0x1f,
860 AR5K_RF_WAIT_S, true);
862 wait_i = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ?
865 ath5k_hw_rfb_op(ah, rf_regs, wait_i,
866 AR5K_RF_WAIT_I, true);
867 ath5k_hw_rfb_op(ah, rf_regs, 3,
868 AR5K_RF_MAX_TIME, true);
873 if (ah->ah_radio == AR5K_RF5112) {
875 /* Set gain_F settings according to current step */
876 if (channel->hw_value & CHANNEL_OFDM) {
878 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[0],
879 AR5K_RF_MIXGAIN_OVR, true);
881 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1],
882 AR5K_RF_PWD_138, true);
884 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2],
885 AR5K_RF_PWD_137, true);
887 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3],
888 AR5K_RF_PWD_136, true);
890 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[4],
891 AR5K_RF_PWD_132, true);
893 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[5],
894 AR5K_RF_PWD_131, true);
896 ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[6],
897 AR5K_RF_PWD_130, true);
899 /* We programmed gain_F parameters, switch back
901 ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE;
906 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode],
907 AR5K_RF_XPD_SEL, true);
909 if (ah->ah_radio_5ghz_revision < AR5K_SREV_RAD_5112A) {
910 /* Rev. 1 supports only one xpd */
911 ath5k_hw_rfb_op(ah, rf_regs,
912 ee->ee_x_gain[ee_mode],
913 AR5K_RF_XPD_GAIN, true);
916 u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode];
917 if (ee->ee_pd_gains[ee_mode] > 1) {
918 ath5k_hw_rfb_op(ah, rf_regs,
920 AR5K_RF_PD_GAIN_LO, true);
921 ath5k_hw_rfb_op(ah, rf_regs,
923 AR5K_RF_PD_GAIN_HI, true);
925 ath5k_hw_rfb_op(ah, rf_regs,
927 AR5K_RF_PD_GAIN_LO, true);
928 ath5k_hw_rfb_op(ah, rf_regs,
930 AR5K_RF_PD_GAIN_HI, true);
933 /* Lower synth voltage on Rev 2 */
934 ath5k_hw_rfb_op(ah, rf_regs, 2,
935 AR5K_RF_HIGH_VC_CP, true);
937 ath5k_hw_rfb_op(ah, rf_regs, 2,
938 AR5K_RF_MID_VC_CP, true);
940 ath5k_hw_rfb_op(ah, rf_regs, 2,
941 AR5K_RF_LOW_VC_CP, true);
943 ath5k_hw_rfb_op(ah, rf_regs, 2,
944 AR5K_RF_PUSH_UP, true);
946 /* Decrease power consumption on 5213+ BaseBand */
947 if (ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) {
948 ath5k_hw_rfb_op(ah, rf_regs, 1,
949 AR5K_RF_PAD2GND, true);
951 ath5k_hw_rfb_op(ah, rf_regs, 1,
952 AR5K_RF_XB2_LVL, true);
954 ath5k_hw_rfb_op(ah, rf_regs, 1,
955 AR5K_RF_XB5_LVL, true);
957 ath5k_hw_rfb_op(ah, rf_regs, 1,
958 AR5K_RF_PWD_167, true);
960 ath5k_hw_rfb_op(ah, rf_regs, 1,
961 AR5K_RF_PWD_166, true);
965 ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode],
966 AR5K_RF_GAIN_I, true);
968 /* Tweak power detector for half/quarter rates */
969 if (ah->ah_bwmode == AR5K_BWMODE_5MHZ ||
970 ah->ah_bwmode == AR5K_BWMODE_10MHZ) {
973 pd_delay = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ?
976 ath5k_hw_rfb_op(ah, rf_regs, pd_delay,
977 AR5K_RF_PD_PERIOD_A, true);
978 ath5k_hw_rfb_op(ah, rf_regs, 0xf,
979 AR5K_RF_PD_DELAY_A, true);
984 if (ah->ah_radio == AR5K_RF5413 &&
985 channel->hw_value & CHANNEL_2GHZ) {
987 ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_DERBY_CHAN_SEL_MODE,
990 /* Set optimum value for early revisions (on pci-e chips) */
991 if (ah->ah_mac_srev >= AR5K_SREV_AR5424 &&
992 ah->ah_mac_srev < AR5K_SREV_AR5413)
993 ath5k_hw_rfb_op(ah, rf_regs, ath5k_hw_bitswap(6, 3),
994 AR5K_RF_PWD_ICLOBUF_2G, true);
998 /* Write RF banks on hw */
999 for (i = 0; i < ah->ah_rf_banks_size; i++) {
1001 ath5k_hw_reg_write(ah, rfb[i], ini_rfb[i].rfb_ctrl_register);
1008 /**************************\
1009 PHY/RF channel functions
1010 \**************************/
1013 * Convertion needed for RF5110
1015 static u32 ath5k_hw_rf5110_chan2athchan(struct ieee80211_channel *channel)
1020 * Convert IEEE channel/MHz to an internal channel value used
1021 * by the AR5210 chipset. This has not been verified with
1022 * newer chipsets like the AR5212A who have a completely
1023 * different RF/PHY part.
1025 athchan = (ath5k_hw_bitswap(
1026 (ieee80211_frequency_to_channel(
1027 channel->center_freq) - 24) / 2, 5)
1028 << 1) | (1 << 6) | 0x1;
1033 * Set channel on RF5110
1035 static int ath5k_hw_rf5110_channel(struct ath5k_hw *ah,
1036 struct ieee80211_channel *channel)
1041 * Set the channel and wait
1043 data = ath5k_hw_rf5110_chan2athchan(channel);
1044 ath5k_hw_reg_write(ah, data, AR5K_RF_BUFFER);
1045 ath5k_hw_reg_write(ah, 0, AR5K_RF_BUFFER_CONTROL_0);
1052 * Convertion needed for 5111
1054 static int ath5k_hw_rf5111_chan2athchan(unsigned int ieee,
1055 struct ath5k_athchan_2ghz *athchan)
1059 /* Cast this value to catch negative channel numbers (>= -19) */
1060 channel = (int)ieee;
1063 * Map 2GHz IEEE channel to 5GHz Atheros channel
1065 if (channel <= 13) {
1066 athchan->a2_athchan = 115 + channel;
1067 athchan->a2_flags = 0x46;
1068 } else if (channel == 14) {
1069 athchan->a2_athchan = 124;
1070 athchan->a2_flags = 0x44;
1071 } else if (channel >= 15 && channel <= 26) {
1072 athchan->a2_athchan = ((channel - 14) * 4) + 132;
1073 athchan->a2_flags = 0x46;
1081 * Set channel on 5111
1083 static int ath5k_hw_rf5111_channel(struct ath5k_hw *ah,
1084 struct ieee80211_channel *channel)
1086 struct ath5k_athchan_2ghz ath5k_channel_2ghz;
1087 unsigned int ath5k_channel =
1088 ieee80211_frequency_to_channel(channel->center_freq);
1089 u32 data0, data1, clock;
1093 * Set the channel on the RF5111 radio
1097 if (channel->hw_value & CHANNEL_2GHZ) {
1098 /* Map 2GHz channel to 5GHz Atheros channel ID */
1099 ret = ath5k_hw_rf5111_chan2athchan(
1100 ieee80211_frequency_to_channel(channel->center_freq),
1101 &ath5k_channel_2ghz);
1105 ath5k_channel = ath5k_channel_2ghz.a2_athchan;
1106 data0 = ((ath5k_hw_bitswap(ath5k_channel_2ghz.a2_flags, 8) & 0xff)
1110 if (ath5k_channel < 145 || !(ath5k_channel & 1)) {
1112 data1 = ((ath5k_hw_bitswap(ath5k_channel - 24, 8) & 0xff) << 2) |
1113 (clock << 1) | (1 << 10) | 1;
1116 data1 = ((ath5k_hw_bitswap((ath5k_channel - 24) / 2, 8) & 0xff)
1117 << 2) | (clock << 1) | (1 << 10) | 1;
1120 ath5k_hw_reg_write(ah, (data1 & 0xff) | ((data0 & 0xff) << 8),
1122 ath5k_hw_reg_write(ah, ((data1 >> 8) & 0xff) | (data0 & 0xff00),
1123 AR5K_RF_BUFFER_CONTROL_3);
1129 * Set channel on 5112 and newer
1131 static int ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
1132 struct ieee80211_channel *channel)
1134 u32 data, data0, data1, data2;
1137 data = data0 = data1 = data2 = 0;
1138 c = channel->center_freq;
1141 if (!((c - 2224) % 5)) {
1142 data0 = ((2 * (c - 704)) - 3040) / 10;
1144 } else if (!((c - 2192) % 5)) {
1145 data0 = ((2 * (c - 672)) - 3040) / 10;
1150 data0 = ath5k_hw_bitswap((data0 << 2) & 0xff, 8);
1151 } else if ((c % 5) != 2 || c > 5435) {
1152 if (!(c % 20) && c >= 5120) {
1153 data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
1154 data2 = ath5k_hw_bitswap(3, 2);
1155 } else if (!(c % 10)) {
1156 data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
1157 data2 = ath5k_hw_bitswap(2, 2);
1158 } else if (!(c % 5)) {
1159 data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
1160 data2 = ath5k_hw_bitswap(1, 2);
1164 data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8);
1165 data2 = ath5k_hw_bitswap(0, 2);
1168 data = (data0 << 4) | (data1 << 1) | (data2 << 2) | 0x1001;
1170 ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
1171 ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
1177 * Set the channel on the RF2425
1179 static int ath5k_hw_rf2425_channel(struct ath5k_hw *ah,
1180 struct ieee80211_channel *channel)
1182 u32 data, data0, data2;
1185 data = data0 = data2 = 0;
1186 c = channel->center_freq;
1189 data0 = ath5k_hw_bitswap((c - 2272), 8);
1192 } else if ((c % 5) != 2 || c > 5435) {
1193 if (!(c % 20) && c < 5120)
1194 data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
1196 data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
1198 data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
1201 data2 = ath5k_hw_bitswap(1, 2);
1203 data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8);
1204 data2 = ath5k_hw_bitswap(0, 2);
1207 data = (data0 << 4) | data2 << 2 | 0x1001;
1209 ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
1210 ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
1216 * Set a channel on the radio chip
1218 static int ath5k_hw_channel(struct ath5k_hw *ah,
1219 struct ieee80211_channel *channel)
1223 * Check bounds supported by the PHY (we don't care about regultory
1224 * restrictions at this point). Note: hw_value already has the band
1225 * (CHANNEL_2GHZ, or CHANNEL_5GHZ) so we inform ath5k_channel_ok()
1226 * of the band by that */
1227 if (!ath5k_channel_ok(ah, channel->center_freq, channel->hw_value)) {
1228 ATH5K_ERR(ah->ah_sc,
1229 "channel frequency (%u MHz) out of supported "
1231 channel->center_freq);
1236 * Set the channel and wait
1238 switch (ah->ah_radio) {
1240 ret = ath5k_hw_rf5110_channel(ah, channel);
1243 ret = ath5k_hw_rf5111_channel(ah, channel);
1246 ret = ath5k_hw_rf2425_channel(ah, channel);
1249 ret = ath5k_hw_rf5112_channel(ah, channel);
1256 /* Set JAPAN setting for channel 14 */
1257 if (channel->center_freq == 2484) {
1258 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
1259 AR5K_PHY_CCKTXCTL_JAPAN);
1261 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
1262 AR5K_PHY_CCKTXCTL_WORLD);
1265 ah->ah_current_channel = channel;
1274 static s32 ath5k_hw_read_measured_noise_floor(struct ath5k_hw *ah)
1278 val = ath5k_hw_reg_read(ah, AR5K_PHY_NF);
1279 return sign_extend32(AR5K_REG_MS(val, AR5K_PHY_NF_MINCCA_PWR), 8);
1282 void ath5k_hw_init_nfcal_hist(struct ath5k_hw *ah)
1286 ah->ah_nfcal_hist.index = 0;
1287 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++)
1288 ah->ah_nfcal_hist.nfval[i] = AR5K_TUNE_CCA_MAX_GOOD_VALUE;
1291 static void ath5k_hw_update_nfcal_hist(struct ath5k_hw *ah, s16 noise_floor)
1293 struct ath5k_nfcal_hist *hist = &ah->ah_nfcal_hist;
1294 hist->index = (hist->index + 1) & (ATH5K_NF_CAL_HIST_MAX-1);
1295 hist->nfval[hist->index] = noise_floor;
1298 static s16 ath5k_hw_get_median_noise_floor(struct ath5k_hw *ah)
1300 s16 sort[ATH5K_NF_CAL_HIST_MAX];
1304 memcpy(sort, ah->ah_nfcal_hist.nfval, sizeof(sort));
1305 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX - 1; i++) {
1306 for (j = 1; j < ATH5K_NF_CAL_HIST_MAX - i; j++) {
1307 if (sort[j] > sort[j-1]) {
1309 sort[j] = sort[j-1];
1314 for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++) {
1315 ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
1316 "cal %d:%d\n", i, sort[i]);
1318 return sort[(ATH5K_NF_CAL_HIST_MAX-1) / 2];
1322 * When we tell the hardware to perform a noise floor calibration
1323 * by setting the AR5K_PHY_AGCCTL_NF bit, it will periodically
1324 * sample-and-hold the minimum noise level seen at the antennas.
1325 * This value is then stored in a ring buffer of recently measured
1326 * noise floor values so we have a moving window of the last few
1329 * The median of the values in the history is then loaded into the
1330 * hardware for its own use for RSSI and CCA measurements.
1332 void ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
1334 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1339 /* keep last value if calibration hasn't completed */
1340 if (ath5k_hw_reg_read(ah, AR5K_PHY_AGCCTL) & AR5K_PHY_AGCCTL_NF) {
1341 ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
1342 "NF did not complete in calibration window\n");
1347 switch (ah->ah_current_channel->hw_value & CHANNEL_MODES) {
1351 ee_mode = AR5K_EEPROM_MODE_11A;
1355 ee_mode = AR5K_EEPROM_MODE_11G;
1359 ee_mode = AR5K_EEPROM_MODE_11B;
1364 /* completed NF calibration, test threshold */
1365 nf = ath5k_hw_read_measured_noise_floor(ah);
1366 threshold = ee->ee_noise_floor_thr[ee_mode];
1368 if (nf > threshold) {
1369 ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
1370 "noise floor failure detected; "
1371 "read %d, threshold %d\n",
1374 nf = AR5K_TUNE_CCA_MAX_GOOD_VALUE;
1377 ath5k_hw_update_nfcal_hist(ah, nf);
1378 nf = ath5k_hw_get_median_noise_floor(ah);
1380 /* load noise floor (in .5 dBm) so the hardware will use it */
1381 val = ath5k_hw_reg_read(ah, AR5K_PHY_NF) & ~AR5K_PHY_NF_M;
1382 val |= (nf * 2) & AR5K_PHY_NF_M;
1383 ath5k_hw_reg_write(ah, val, AR5K_PHY_NF);
1385 AR5K_REG_MASKED_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF,
1386 ~(AR5K_PHY_AGCCTL_NF_EN | AR5K_PHY_AGCCTL_NF_NOUPDATE));
1388 ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF,
1392 * Load a high max CCA Power value (-50 dBm in .5 dBm units)
1393 * so that we're not capped by the median we just loaded.
1394 * This will be used as the initial value for the next noise
1395 * floor calibration.
1397 val = (val & ~AR5K_PHY_NF_M) | ((-50 * 2) & AR5K_PHY_NF_M);
1398 ath5k_hw_reg_write(ah, val, AR5K_PHY_NF);
1399 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
1400 AR5K_PHY_AGCCTL_NF_EN |
1401 AR5K_PHY_AGCCTL_NF_NOUPDATE |
1402 AR5K_PHY_AGCCTL_NF);
1404 ah->ah_noise_floor = nf;
1406 ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
1407 "noise floor calibrated: %d\n", nf);
1411 * Perform a PHY calibration on RF5110
1412 * -Fix BPSK/QAM Constellation (I/Q correction)
1414 static int ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah,
1415 struct ieee80211_channel *channel)
1417 u32 phy_sig, phy_agc, phy_sat, beacon;
1421 * Disable beacons and RX/TX queues, wait
1423 AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW_5210,
1424 AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210);
1425 beacon = ath5k_hw_reg_read(ah, AR5K_BEACON_5210);
1426 ath5k_hw_reg_write(ah, beacon & ~AR5K_BEACON_ENABLE, AR5K_BEACON_5210);
1431 * Set the channel (with AGC turned off)
1433 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1435 ret = ath5k_hw_channel(ah, channel);
1438 * Activate PHY and wait
1440 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
1443 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1449 * Calibrate the radio chip
1452 /* Remember normal state */
1453 phy_sig = ath5k_hw_reg_read(ah, AR5K_PHY_SIG);
1454 phy_agc = ath5k_hw_reg_read(ah, AR5K_PHY_AGCCOARSE);
1455 phy_sat = ath5k_hw_reg_read(ah, AR5K_PHY_ADCSAT);
1457 /* Update radio registers */
1458 ath5k_hw_reg_write(ah, (phy_sig & ~(AR5K_PHY_SIG_FIRPWR)) |
1459 AR5K_REG_SM(-1, AR5K_PHY_SIG_FIRPWR), AR5K_PHY_SIG);
1461 ath5k_hw_reg_write(ah, (phy_agc & ~(AR5K_PHY_AGCCOARSE_HI |
1462 AR5K_PHY_AGCCOARSE_LO)) |
1463 AR5K_REG_SM(-1, AR5K_PHY_AGCCOARSE_HI) |
1464 AR5K_REG_SM(-127, AR5K_PHY_AGCCOARSE_LO), AR5K_PHY_AGCCOARSE);
1466 ath5k_hw_reg_write(ah, (phy_sat & ~(AR5K_PHY_ADCSAT_ICNT |
1467 AR5K_PHY_ADCSAT_THR)) |
1468 AR5K_REG_SM(2, AR5K_PHY_ADCSAT_ICNT) |
1469 AR5K_REG_SM(12, AR5K_PHY_ADCSAT_THR), AR5K_PHY_ADCSAT);
1473 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1475 ath5k_hw_reg_write(ah, AR5K_PHY_RFSTG_DISABLE, AR5K_PHY_RFSTG);
1476 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
1481 * Enable calibration and wait until completion
1483 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_CAL);
1485 ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
1486 AR5K_PHY_AGCCTL_CAL, 0, false);
1488 /* Reset to normal state */
1489 ath5k_hw_reg_write(ah, phy_sig, AR5K_PHY_SIG);
1490 ath5k_hw_reg_write(ah, phy_agc, AR5K_PHY_AGCCOARSE);
1491 ath5k_hw_reg_write(ah, phy_sat, AR5K_PHY_ADCSAT);
1494 ATH5K_ERR(ah->ah_sc, "calibration timeout (%uMHz)\n",
1495 channel->center_freq);
1500 * Re-enable RX/TX and beacons
1502 AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW_5210,
1503 AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210);
1504 ath5k_hw_reg_write(ah, beacon, AR5K_BEACON_5210);
1510 * Perform I/Q calibration on RF5111/5112 and newer chips
1513 ath5k_hw_rf511x_iq_calibrate(struct ath5k_hw *ah)
1516 s32 iq_corr, i_coff, i_coffd, q_coff, q_coffd;
1519 if (!ah->ah_calibration ||
1520 ath5k_hw_reg_read(ah, AR5K_PHY_IQ) & AR5K_PHY_IQ_RUN)
1523 /* Calibration has finished, get the results and re-run */
1524 /* work around empty results which can apparently happen on 5212 */
1525 for (i = 0; i <= 10; i++) {
1526 iq_corr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_CORR);
1527 i_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_I);
1528 q_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_Q);
1529 ATH5K_DBG_UNLIMIT(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
1530 "iq_corr:%x i_pwr:%x q_pwr:%x", iq_corr, i_pwr, q_pwr);
1535 i_coffd = ((i_pwr >> 1) + (q_pwr >> 1)) >> 7;
1537 if (ah->ah_version == AR5K_AR5211)
1538 q_coffd = q_pwr >> 6;
1540 q_coffd = q_pwr >> 7;
1542 /* protect against divide by 0 and loss of sign bits */
1543 if (i_coffd == 0 || q_coffd < 2)
1546 i_coff = (-iq_corr) / i_coffd;
1547 i_coff = clamp(i_coff, -32, 31); /* signed 6 bit */
1549 if (ah->ah_version == AR5K_AR5211)
1550 q_coff = (i_pwr / q_coffd) - 64;
1552 q_coff = (i_pwr / q_coffd) - 128;
1553 q_coff = clamp(q_coff, -16, 15); /* signed 5 bit */
1555 ATH5K_DBG_UNLIMIT(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
1556 "new I:%d Q:%d (i_coffd:%x q_coffd:%x)",
1557 i_coff, q_coff, i_coffd, q_coffd);
1559 /* Commit new I/Q values (set enable bit last to match HAL sources) */
1560 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF, i_coff);
1561 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF, q_coff);
1562 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE);
1564 /* Re-enable calibration -if we don't we'll commit
1565 * the same values again and again */
1566 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
1567 AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
1568 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_RUN);
1574 * Perform a PHY calibration
1576 int ath5k_hw_phy_calibrate(struct ath5k_hw *ah,
1577 struct ieee80211_channel *channel)
1581 if (ah->ah_radio == AR5K_RF5110)
1582 ret = ath5k_hw_rf5110_calibrate(ah, channel);
1584 ret = ath5k_hw_rf511x_iq_calibrate(ah);
1585 ath5k_hw_request_rfgain_probe(ah);
1592 /***************************\
1593 * Spur mitigation functions *
1594 \***************************/
1597 ath5k_hw_set_spur_mitigation_filter(struct ath5k_hw *ah,
1598 struct ieee80211_channel *channel)
1600 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
1601 u32 mag_mask[4] = {0, 0, 0, 0};
1602 u32 pilot_mask[2] = {0, 0};
1603 /* Note: fbin values are scaled up by 2 */
1604 u16 spur_chan_fbin, chan_fbin, symbol_width, spur_detection_window;
1605 s32 spur_delta_phase, spur_freq_sigma_delta;
1606 s32 spur_offset, num_symbols_x16;
1607 u8 num_symbol_offsets, i, freq_band;
1609 /* Convert current frequency to fbin value (the same way channels
1610 * are stored on EEPROM, check out ath5k_eeprom_bin2freq) and scale
1611 * up by 2 so we can compare it later */
1612 if (channel->hw_value & CHANNEL_2GHZ) {
1613 chan_fbin = (channel->center_freq - 2300) * 10;
1614 freq_band = AR5K_EEPROM_BAND_2GHZ;
1616 chan_fbin = (channel->center_freq - 4900) * 10;
1617 freq_band = AR5K_EEPROM_BAND_5GHZ;
1620 /* Check if any spur_chan_fbin from EEPROM is
1621 * within our current channel's spur detection range */
1622 spur_chan_fbin = AR5K_EEPROM_NO_SPUR;
1623 spur_detection_window = AR5K_SPUR_CHAN_WIDTH;
1624 /* XXX: Half/Quarter channels ?*/
1625 if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
1626 spur_detection_window *= 2;
1628 for (i = 0; i < AR5K_EEPROM_N_SPUR_CHANS; i++) {
1629 spur_chan_fbin = ee->ee_spur_chans[i][freq_band];
1631 /* Note: mask cleans AR5K_EEPROM_NO_SPUR flag
1632 * so it's zero if we got nothing from EEPROM */
1633 if (spur_chan_fbin == AR5K_EEPROM_NO_SPUR) {
1634 spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK;
1638 if ((chan_fbin - spur_detection_window <=
1639 (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK)) &&
1640 (chan_fbin + spur_detection_window >=
1641 (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK))) {
1642 spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK;
1647 /* We need to enable spur filter for this channel */
1648 if (spur_chan_fbin) {
1649 spur_offset = spur_chan_fbin - chan_fbin;
1652 * spur_freq_sigma_delta -> spur_offset / sample_freq << 21
1653 * spur_delta_phase -> spur_offset / chip_freq << 11
1654 * Note: Both values have 100Hz resolution
1656 switch (ah->ah_bwmode) {
1657 case AR5K_BWMODE_40MHZ:
1658 /* Both sample_freq and chip_freq are 80MHz */
1659 spur_delta_phase = (spur_offset << 16) / 25;
1660 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1661 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz * 2;
1663 case AR5K_BWMODE_10MHZ:
1664 /* Both sample_freq and chip_freq are 20MHz (?) */
1665 spur_delta_phase = (spur_offset << 18) / 25;
1666 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1667 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 2;
1668 case AR5K_BWMODE_5MHZ:
1669 /* Both sample_freq and chip_freq are 10MHz (?) */
1670 spur_delta_phase = (spur_offset << 19) / 25;
1671 spur_freq_sigma_delta = (spur_delta_phase >> 10);
1672 symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 4;
1674 if (channel->hw_value == CHANNEL_A) {
1675 /* Both sample_freq and chip_freq are 40MHz */
1676 spur_delta_phase = (spur_offset << 17) / 25;
1677 spur_freq_sigma_delta =
1678 (spur_delta_phase >> 10);
1680 AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz;
1682 /* sample_freq -> 40MHz chip_freq -> 44MHz
1683 * (for b compatibility) */
1684 spur_delta_phase = (spur_offset << 17) / 25;
1685 spur_freq_sigma_delta =
1686 (spur_offset << 8) / 55;
1688 AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz;
1693 /* Calculate pilot and magnitude masks */
1695 /* Scale up spur_offset by 1000 to switch to 100HZ resolution
1696 * and divide by symbol_width to find how many symbols we have
1697 * Note: number of symbols is scaled up by 16 */
1698 num_symbols_x16 = ((spur_offset * 1000) << 4) / symbol_width;
1700 /* Spur is on a symbol if num_symbols_x16 % 16 is zero */
1701 if (!(num_symbols_x16 & 0xF))
1703 num_symbol_offsets = 3;
1706 num_symbol_offsets = 4;
1708 for (i = 0; i < num_symbol_offsets; i++) {
1710 /* Calculate pilot mask */
1712 (num_symbols_x16 / 16) + i + 25;
1714 /* Pilot magnitude mask seems to be a way to
1715 * declare the boundaries for our detection
1716 * window or something, it's 2 for the middle
1717 * value(s) where the symbol is expected to be
1718 * and 1 on the boundary values */
1720 (i == 0 || i == (num_symbol_offsets - 1))
1723 if (curr_sym_off >= 0 && curr_sym_off <= 32) {
1724 if (curr_sym_off <= 25)
1725 pilot_mask[0] |= 1 << curr_sym_off;
1726 else if (curr_sym_off >= 27)
1727 pilot_mask[0] |= 1 << (curr_sym_off - 1);
1728 } else if (curr_sym_off >= 33 && curr_sym_off <= 52)
1729 pilot_mask[1] |= 1 << (curr_sym_off - 33);
1731 /* Calculate magnitude mask (for viterbi decoder) */
1732 if (curr_sym_off >= -1 && curr_sym_off <= 14)
1734 plt_mag_map << (curr_sym_off + 1) * 2;
1735 else if (curr_sym_off >= 15 && curr_sym_off <= 30)
1737 plt_mag_map << (curr_sym_off - 15) * 2;
1738 else if (curr_sym_off >= 31 && curr_sym_off <= 46)
1740 plt_mag_map << (curr_sym_off - 31) * 2;
1741 else if (curr_sym_off >= 47 && curr_sym_off <= 53)
1743 plt_mag_map << (curr_sym_off - 47) * 2;
1747 /* Write settings on hw to enable spur filter */
1748 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
1749 AR5K_PHY_BIN_MASK_CTL_RATE, 0xff);
1750 /* XXX: Self correlator also ? */
1751 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
1752 AR5K_PHY_IQ_PILOT_MASK_EN |
1753 AR5K_PHY_IQ_CHAN_MASK_EN |
1754 AR5K_PHY_IQ_SPUR_FILT_EN);
1756 /* Set delta phase and freq sigma delta */
1757 ath5k_hw_reg_write(ah,
1758 AR5K_REG_SM(spur_delta_phase,
1759 AR5K_PHY_TIMING_11_SPUR_DELTA_PHASE) |
1760 AR5K_REG_SM(spur_freq_sigma_delta,
1761 AR5K_PHY_TIMING_11_SPUR_FREQ_SD) |
1762 AR5K_PHY_TIMING_11_USE_SPUR_IN_AGC,
1763 AR5K_PHY_TIMING_11);
1765 /* Write pilot masks */
1766 ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_7);
1767 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8,
1768 AR5K_PHY_TIMING_8_PILOT_MASK_2,
1771 ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_9);
1772 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10,
1773 AR5K_PHY_TIMING_10_PILOT_MASK_2,
1776 /* Write magnitude masks */
1777 ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK_1);
1778 ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK_2);
1779 ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK_3);
1780 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
1781 AR5K_PHY_BIN_MASK_CTL_MASK_4,
1784 ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK2_1);
1785 ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK2_2);
1786 ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK2_3);
1787 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4,
1788 AR5K_PHY_BIN_MASK2_4_MASK_4,
1791 } else if (ath5k_hw_reg_read(ah, AR5K_PHY_IQ) &
1792 AR5K_PHY_IQ_SPUR_FILT_EN) {
1793 /* Clean up spur mitigation settings and disable fliter */
1794 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
1795 AR5K_PHY_BIN_MASK_CTL_RATE, 0);
1796 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_IQ,
1797 AR5K_PHY_IQ_PILOT_MASK_EN |
1798 AR5K_PHY_IQ_CHAN_MASK_EN |
1799 AR5K_PHY_IQ_SPUR_FILT_EN);
1800 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_11);
1802 /* Clear pilot masks */
1803 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_7);
1804 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8,
1805 AR5K_PHY_TIMING_8_PILOT_MASK_2,
1808 ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_9);
1809 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10,
1810 AR5K_PHY_TIMING_10_PILOT_MASK_2,
1813 /* Clear magnitude masks */
1814 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_1);
1815 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_2);
1816 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_3);
1817 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL,
1818 AR5K_PHY_BIN_MASK_CTL_MASK_4,
1821 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_1);
1822 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_2);
1823 ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_3);
1824 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4,
1825 AR5K_PHY_BIN_MASK2_4_MASK_4,
1835 static void /*TODO:Boundary check*/
1836 ath5k_hw_set_def_antenna(struct ath5k_hw *ah, u8 ant)
1838 if (ah->ah_version != AR5K_AR5210)
1839 ath5k_hw_reg_write(ah, ant & 0x7, AR5K_DEFAULT_ANTENNA);
1843 * Enable/disable fast rx antenna diversity
1846 ath5k_hw_set_fast_div(struct ath5k_hw *ah, u8 ee_mode, bool enable)
1849 case AR5K_EEPROM_MODE_11G:
1850 /* XXX: This is set to
1851 * disabled on initvals !!! */
1852 case AR5K_EEPROM_MODE_11A:
1854 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGCCTL,
1855 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
1857 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
1858 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
1860 case AR5K_EEPROM_MODE_11B:
1861 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
1862 AR5K_PHY_AGCCTL_OFDM_DIV_DIS);
1869 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
1870 AR5K_PHY_RESTART_DIV_GC, 4);
1872 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
1873 AR5K_PHY_FAST_ANT_DIV_EN);
1875 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART,
1876 AR5K_PHY_RESTART_DIV_GC, 0);
1878 AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV,
1879 AR5K_PHY_FAST_ANT_DIV_EN);
1884 ath5k_hw_set_antenna_switch(struct ath5k_hw *ah, u8 ee_mode)
1889 * In case a fixed antenna was set as default
1890 * use the same switch table twice.
1892 if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_A)
1893 ant0 = ant1 = AR5K_ANT_SWTABLE_A;
1894 else if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_B)
1895 ant0 = ant1 = AR5K_ANT_SWTABLE_B;
1897 ant0 = AR5K_ANT_SWTABLE_A;
1898 ant1 = AR5K_ANT_SWTABLE_B;
1901 /* Set antenna idle switch table */
1902 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_ANT_CTL,
1903 AR5K_PHY_ANT_CTL_SWTABLE_IDLE,
1904 (ah->ah_ant_ctl[ee_mode][AR5K_ANT_CTL] |
1905 AR5K_PHY_ANT_CTL_TXRX_EN));
1907 /* Set antenna switch tables */
1908 ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant0],
1909 AR5K_PHY_ANT_SWITCH_TABLE_0);
1910 ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant1],
1911 AR5K_PHY_ANT_SWITCH_TABLE_1);
1915 * Set antenna operating mode
1918 ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode)
1920 struct ieee80211_channel *channel = ah->ah_current_channel;
1921 bool use_def_for_tx, update_def_on_tx, use_def_for_rts, fast_div;
1922 bool use_def_for_sg;
1923 u8 def_ant, tx_ant, ee_mode;
1926 /* if channel is not initialized yet we can't set the antennas
1927 * so just store the mode. it will be set on the next reset */
1928 if (channel == NULL) {
1929 ah->ah_ant_mode = ant_mode;
1933 def_ant = ah->ah_def_ant;
1935 switch (channel->hw_value & CHANNEL_MODES) {
1939 ee_mode = AR5K_EEPROM_MODE_11A;
1943 ee_mode = AR5K_EEPROM_MODE_11G;
1946 ee_mode = AR5K_EEPROM_MODE_11B;
1949 ATH5K_ERR(ah->ah_sc,
1950 "invalid channel: %d\n", channel->center_freq);
1955 case AR5K_ANTMODE_DEFAULT:
1957 use_def_for_tx = false;
1958 update_def_on_tx = false;
1959 use_def_for_rts = false;
1960 use_def_for_sg = false;
1963 case AR5K_ANTMODE_FIXED_A:
1966 use_def_for_tx = true;
1967 update_def_on_tx = false;
1968 use_def_for_rts = true;
1969 use_def_for_sg = true;
1972 case AR5K_ANTMODE_FIXED_B:
1975 use_def_for_tx = true;
1976 update_def_on_tx = false;
1977 use_def_for_rts = true;
1978 use_def_for_sg = true;
1981 case AR5K_ANTMODE_SINGLE_AP:
1982 def_ant = 1; /* updated on tx */
1984 use_def_for_tx = true;
1985 update_def_on_tx = true;
1986 use_def_for_rts = true;
1987 use_def_for_sg = true;
1990 case AR5K_ANTMODE_SECTOR_AP:
1991 tx_ant = 1; /* variable */
1992 use_def_for_tx = false;
1993 update_def_on_tx = false;
1994 use_def_for_rts = true;
1995 use_def_for_sg = false;
1998 case AR5K_ANTMODE_SECTOR_STA:
1999 tx_ant = 1; /* variable */
2000 use_def_for_tx = true;
2001 update_def_on_tx = false;
2002 use_def_for_rts = true;
2003 use_def_for_sg = false;
2006 case AR5K_ANTMODE_DEBUG:
2009 use_def_for_tx = false;
2010 update_def_on_tx = false;
2011 use_def_for_rts = false;
2012 use_def_for_sg = false;
2019 ah->ah_tx_ant = tx_ant;
2020 ah->ah_ant_mode = ant_mode;
2021 ah->ah_def_ant = def_ant;
2023 sta_id1 |= use_def_for_tx ? AR5K_STA_ID1_DEFAULT_ANTENNA : 0;
2024 sta_id1 |= update_def_on_tx ? AR5K_STA_ID1_DESC_ANTENNA : 0;
2025 sta_id1 |= use_def_for_rts ? AR5K_STA_ID1_RTS_DEF_ANTENNA : 0;
2026 sta_id1 |= use_def_for_sg ? AR5K_STA_ID1_SELFGEN_DEF_ANT : 0;
2028 AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_ANTENNA_SETTINGS);
2031 AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1, sta_id1);
2033 ath5k_hw_set_antenna_switch(ah, ee_mode);
2034 /* Note: set diversity before default antenna
2035 * because it won't work correctly */
2036 ath5k_hw_set_fast_div(ah, ee_mode, fast_div);
2037 ath5k_hw_set_def_antenna(ah, def_ant);
2050 * Do linear interpolation between two given (x, y) points
2053 ath5k_get_interpolated_value(s16 target, s16 x_left, s16 x_right,
2054 s16 y_left, s16 y_right)
2058 /* Avoid divide by zero and skip interpolation
2059 * if we have the same point */
2060 if ((x_left == x_right) || (y_left == y_right))
2064 * Since we use ints and not fps, we need to scale up in
2065 * order to get a sane ratio value (or else we 'll eg. get
2066 * always 1 instead of 1.25, 1.75 etc). We scale up by 100
2067 * to have some accuracy both for 0.5 and 0.25 steps.
2069 ratio = ((100 * y_right - 100 * y_left)/(x_right - x_left));
2071 /* Now scale down to be in range */
2072 result = y_left + (ratio * (target - x_left) / 100);
2078 * Find vertical boundary (min pwr) for the linear PCDAC curve.
2080 * Since we have the top of the curve and we draw the line below
2081 * until we reach 1 (1 pcdac step) we need to know which point
2082 * (x value) that is so that we don't go below y axis and have negative
2083 * pcdac values when creating the curve, or fill the table with zeroes.
2086 ath5k_get_linear_pcdac_min(const u8 *stepL, const u8 *stepR,
2087 const s16 *pwrL, const s16 *pwrR)
2090 s16 min_pwrL, min_pwrR;
2093 /* Some vendors write the same pcdac value twice !!! */
2094 if (stepL[0] == stepL[1] || stepR[0] == stepR[1])
2095 return max(pwrL[0], pwrR[0]);
2097 if (pwrL[0] == pwrL[1])
2103 tmp = (s8) ath5k_get_interpolated_value(pwr_i,
2105 stepL[0], stepL[1]);
2111 if (pwrR[0] == pwrR[1])
2117 tmp = (s8) ath5k_get_interpolated_value(pwr_i,
2119 stepR[0], stepR[1]);
2125 /* Keep the right boundary so that it works for both curves */
2126 return max(min_pwrL, min_pwrR);
2130 * Interpolate (pwr,vpd) points to create a Power to PDADC or a
2131 * Power to PCDAC curve.
2133 * Each curve has power on x axis (in 0.5dB units) and PCDAC/PDADC
2134 * steps (offsets) on y axis. Power can go up to 31.5dB and max
2135 * PCDAC/PDADC step for each curve is 64 but we can write more than
2136 * one curves on hw so we can go up to 128 (which is the max step we
2137 * can write on the final table).
2139 * We write y values (PCDAC/PDADC steps) on hw.
2142 ath5k_create_power_curve(s16 pmin, s16 pmax,
2143 const s16 *pwr, const u8 *vpd,
2145 u8 *vpd_table, u8 type)
2147 u8 idx[2] = { 0, 1 };
2154 /* We want the whole line, so adjust boundaries
2155 * to cover the entire power range. Note that
2156 * power values are already 0.25dB so no need
2157 * to multiply pwr_i by 2 */
2158 if (type == AR5K_PWRTABLE_LINEAR_PCDAC) {
2164 /* Find surrounding turning points (TPs)
2165 * and interpolate between them */
2166 for (i = 0; (i <= (u16) (pmax - pmin)) &&
2167 (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) {
2169 /* We passed the right TP, move to the next set of TPs
2170 * if we pass the last TP, extrapolate above using the last
2171 * two TPs for ratio */
2172 if ((pwr_i > pwr[idx[1]]) && (idx[1] < num_points - 1)) {
2177 vpd_table[i] = (u8) ath5k_get_interpolated_value(pwr_i,
2178 pwr[idx[0]], pwr[idx[1]],
2179 vpd[idx[0]], vpd[idx[1]]);
2181 /* Increase by 0.5dB
2182 * (0.25 dB units) */
2188 * Get the surrounding per-channel power calibration piers
2189 * for a given frequency so that we can interpolate between
2190 * them and come up with an apropriate dataset for our current
2194 ath5k_get_chan_pcal_surrounding_piers(struct ath5k_hw *ah,
2195 struct ieee80211_channel *channel,
2196 struct ath5k_chan_pcal_info **pcinfo_l,
2197 struct ath5k_chan_pcal_info **pcinfo_r)
2199 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2200 struct ath5k_chan_pcal_info *pcinfo;
2203 u32 target = channel->center_freq;
2208 if (!(channel->hw_value & CHANNEL_OFDM)) {
2209 pcinfo = ee->ee_pwr_cal_b;
2210 mode = AR5K_EEPROM_MODE_11B;
2211 } else if (channel->hw_value & CHANNEL_2GHZ) {
2212 pcinfo = ee->ee_pwr_cal_g;
2213 mode = AR5K_EEPROM_MODE_11G;
2215 pcinfo = ee->ee_pwr_cal_a;
2216 mode = AR5K_EEPROM_MODE_11A;
2218 max = ee->ee_n_piers[mode] - 1;
2220 /* Frequency is below our calibrated
2221 * range. Use the lowest power curve
2223 if (target < pcinfo[0].freq) {
2228 /* Frequency is above our calibrated
2229 * range. Use the highest power curve
2231 if (target > pcinfo[max].freq) {
2232 idx_l = idx_r = max;
2236 /* Frequency is inside our calibrated
2237 * channel range. Pick the surrounding
2238 * calibration piers so that we can
2240 for (i = 0; i <= max; i++) {
2242 /* Frequency matches one of our calibration
2243 * piers, no need to interpolate, just use
2244 * that calibration pier */
2245 if (pcinfo[i].freq == target) {
2250 /* We found a calibration pier that's above
2251 * frequency, use this pier and the previous
2252 * one to interpolate */
2253 if (target < pcinfo[i].freq) {
2261 *pcinfo_l = &pcinfo[idx_l];
2262 *pcinfo_r = &pcinfo[idx_r];
2266 * Get the surrounding per-rate power calibration data
2267 * for a given frequency and interpolate between power
2268 * values to set max target power supported by hw for
2272 ath5k_get_rate_pcal_data(struct ath5k_hw *ah,
2273 struct ieee80211_channel *channel,
2274 struct ath5k_rate_pcal_info *rates)
2276 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2277 struct ath5k_rate_pcal_info *rpinfo;
2280 u32 target = channel->center_freq;
2285 if (!(channel->hw_value & CHANNEL_OFDM)) {
2286 rpinfo = ee->ee_rate_tpwr_b;
2287 mode = AR5K_EEPROM_MODE_11B;
2288 } else if (channel->hw_value & CHANNEL_2GHZ) {
2289 rpinfo = ee->ee_rate_tpwr_g;
2290 mode = AR5K_EEPROM_MODE_11G;
2292 rpinfo = ee->ee_rate_tpwr_a;
2293 mode = AR5K_EEPROM_MODE_11A;
2295 max = ee->ee_rate_target_pwr_num[mode] - 1;
2297 /* Get the surrounding calibration
2298 * piers - same as above */
2299 if (target < rpinfo[0].freq) {
2304 if (target > rpinfo[max].freq) {
2305 idx_l = idx_r = max;
2309 for (i = 0; i <= max; i++) {
2311 if (rpinfo[i].freq == target) {
2316 if (target < rpinfo[i].freq) {
2324 /* Now interpolate power value, based on the frequency */
2325 rates->freq = target;
2327 rates->target_power_6to24 =
2328 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2330 rpinfo[idx_l].target_power_6to24,
2331 rpinfo[idx_r].target_power_6to24);
2333 rates->target_power_36 =
2334 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2336 rpinfo[idx_l].target_power_36,
2337 rpinfo[idx_r].target_power_36);
2339 rates->target_power_48 =
2340 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2342 rpinfo[idx_l].target_power_48,
2343 rpinfo[idx_r].target_power_48);
2345 rates->target_power_54 =
2346 ath5k_get_interpolated_value(target, rpinfo[idx_l].freq,
2348 rpinfo[idx_l].target_power_54,
2349 rpinfo[idx_r].target_power_54);
2353 * Get the max edge power for this channel if
2354 * we have such data from EEPROM's Conformance Test
2355 * Limits (CTL), and limit max power if needed.
2358 ath5k_get_max_ctl_power(struct ath5k_hw *ah,
2359 struct ieee80211_channel *channel)
2361 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
2362 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2363 struct ath5k_edge_power *rep = ee->ee_ctl_pwr;
2364 u8 *ctl_val = ee->ee_ctl;
2365 s16 max_chan_pwr = ah->ah_txpower.txp_max_pwr / 4;
2370 u32 target = channel->center_freq;
2372 ctl_mode = ath_regd_get_band_ctl(regulatory, channel->band);
2374 switch (channel->hw_value & CHANNEL_MODES) {
2376 ctl_mode |= AR5K_CTL_11A;
2379 ctl_mode |= AR5K_CTL_11G;
2382 ctl_mode |= AR5K_CTL_11B;
2385 ctl_mode |= AR5K_CTL_TURBO;
2388 ctl_mode |= AR5K_CTL_TURBOG;
2396 for (i = 0; i < ee->ee_ctls; i++) {
2397 if (ctl_val[i] == ctl_mode) {
2403 /* If we have a CTL dataset available grab it and find the
2404 * edge power for our frequency */
2405 if (ctl_idx == 0xFF)
2408 /* Edge powers are sorted by frequency from lower
2409 * to higher. Each CTL corresponds to 8 edge power
2411 rep_idx = ctl_idx * AR5K_EEPROM_N_EDGES;
2413 /* Don't do boundaries check because we
2414 * might have more that one bands defined
2417 /* Get the edge power that's closer to our
2419 for (i = 0; i < AR5K_EEPROM_N_EDGES; i++) {
2421 if (target <= rep[rep_idx].freq)
2422 edge_pwr = (s16) rep[rep_idx].edge;
2426 ah->ah_txpower.txp_max_pwr = 4*min(edge_pwr, max_chan_pwr);
2431 * Power to PCDAC table functions
2435 * Fill Power to PCDAC table on RF5111
2437 * No further processing is needed for RF5111, the only thing we have to
2438 * do is fill the values below and above calibration range since eeprom data
2439 * may not cover the entire PCDAC table.
2442 ath5k_fill_pwr_to_pcdac_table(struct ath5k_hw *ah, s16* table_min,
2445 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2446 u8 *pcdac_tmp = ah->ah_txpower.tmpL[0];
2447 u8 pcdac_0, pcdac_n, pcdac_i, pwr_idx, i;
2448 s16 min_pwr, max_pwr;
2450 /* Get table boundaries */
2451 min_pwr = table_min[0];
2452 pcdac_0 = pcdac_tmp[0];
2454 max_pwr = table_max[0];
2455 pcdac_n = pcdac_tmp[table_max[0] - table_min[0]];
2457 /* Extrapolate below minimum using pcdac_0 */
2459 for (i = 0; i < min_pwr; i++)
2460 pcdac_out[pcdac_i++] = pcdac_0;
2462 /* Copy values from pcdac_tmp */
2464 for (i = 0 ; pwr_idx <= max_pwr &&
2465 pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE; i++) {
2466 pcdac_out[pcdac_i++] = pcdac_tmp[i];
2470 /* Extrapolate above maximum */
2471 while (pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE)
2472 pcdac_out[pcdac_i++] = pcdac_n;
2477 * Combine available XPD Curves and fill Linear Power to PCDAC table
2480 * RFX112 can have up to 2 curves (one for low txpower range and one for
2481 * higher txpower range). We need to put them both on pcdac_out and place
2482 * them in the correct location. In case we only have one curve available
2483 * just fit it on pcdac_out (it's supposed to cover the entire range of
2484 * available pwr levels since it's always the higher power curve). Extrapolate
2485 * below and above final table if needed.
2488 ath5k_combine_linear_pcdac_curves(struct ath5k_hw *ah, s16* table_min,
2489 s16 *table_max, u8 pdcurves)
2491 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2498 s16 mid_pwr_idx = 0;
2499 /* Edge flag turs on the 7nth bit on the PCDAC
2500 * to delcare the higher power curve (force values
2501 * to be greater than 64). If we only have one curve
2502 * we don't need to set this, if we have 2 curves and
2503 * fill the table backwards this can also be used to
2504 * switch from higher power curve to lower power curve */
2508 /* When we have only one curve available
2509 * that's the higher power curve. If we have
2510 * two curves the first is the high power curve
2511 * and the next is the low power curve. */
2513 pcdac_low_pwr = ah->ah_txpower.tmpL[1];
2514 pcdac_high_pwr = ah->ah_txpower.tmpL[0];
2515 mid_pwr_idx = table_max[1] - table_min[1] - 1;
2516 max_pwr_idx = (table_max[0] - table_min[0]) / 2;
2518 /* If table size goes beyond 31.5dB, keep the
2519 * upper 31.5dB range when setting tx power.
2520 * Note: 126 = 31.5 dB in quarter dB steps */
2521 if (table_max[0] - table_min[1] > 126)
2522 min_pwr_idx = table_max[0] - 126;
2524 min_pwr_idx = table_min[1];
2526 /* Since we fill table backwards
2527 * start from high power curve */
2528 pcdac_tmp = pcdac_high_pwr;
2532 pcdac_low_pwr = ah->ah_txpower.tmpL[1]; /* Zeroed */
2533 pcdac_high_pwr = ah->ah_txpower.tmpL[0];
2534 min_pwr_idx = table_min[0];
2535 max_pwr_idx = (table_max[0] - table_min[0]) / 2;
2536 pcdac_tmp = pcdac_high_pwr;
2540 /* This is used when setting tx power*/
2541 ah->ah_txpower.txp_min_idx = min_pwr_idx/2;
2543 /* Fill Power to PCDAC table backwards */
2545 for (i = 63; i >= 0; i--) {
2546 /* Entering lower power range, reset
2547 * edge flag and set pcdac_tmp to lower
2549 if (edge_flag == 0x40 &&
2550 (2*pwr <= (table_max[1] - table_min[0]) || pwr == 0)) {
2552 pcdac_tmp = pcdac_low_pwr;
2553 pwr = mid_pwr_idx/2;
2556 /* Don't go below 1, extrapolate below if we have
2557 * already swithced to the lower power curve -or
2558 * we only have one curve and edge_flag is zero
2560 if (pcdac_tmp[pwr] < 1 && (edge_flag == 0x00)) {
2562 pcdac_out[i] = pcdac_out[i + 1];
2568 pcdac_out[i] = pcdac_tmp[pwr] | edge_flag;
2570 /* Extrapolate above if pcdac is greater than
2571 * 126 -this can happen because we OR pcdac_out
2572 * value with edge_flag on high power curve */
2573 if (pcdac_out[i] > 126)
2576 /* Decrease by a 0.5dB step */
2581 /* Write PCDAC values on hw */
2583 ath5k_setup_pcdac_table(struct ath5k_hw *ah)
2585 u8 *pcdac_out = ah->ah_txpower.txp_pd_table;
2589 * Write TX power values
2591 for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
2592 ath5k_hw_reg_write(ah,
2593 (((pcdac_out[2*i + 0] << 8 | 0xff) & 0xffff) << 0) |
2594 (((pcdac_out[2*i + 1] << 8 | 0xff) & 0xffff) << 16),
2595 AR5K_PHY_PCDAC_TXPOWER(i));
2601 * Power to PDADC table functions
2605 * Set the gain boundaries and create final Power to PDADC table
2607 * We can have up to 4 pd curves, we need to do a simmilar process
2608 * as we do for RF5112. This time we don't have an edge_flag but we
2609 * set the gain boundaries on a separate register.
2612 ath5k_combine_pwr_to_pdadc_curves(struct ath5k_hw *ah,
2613 s16 *pwr_min, s16 *pwr_max, u8 pdcurves)
2615 u8 gain_boundaries[AR5K_EEPROM_N_PD_GAINS];
2616 u8 *pdadc_out = ah->ah_txpower.txp_pd_table;
2619 u8 pdadc_i, pdadc_n, pwr_step, pdg, max_idx, table_size;
2622 /* Note: Register value is initialized on initvals
2623 * there is no feedback from hw.
2624 * XXX: What about pd_gain_overlap from EEPROM ? */
2625 pd_gain_overlap = (u8) ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG5) &
2626 AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP;
2628 /* Create final PDADC table */
2629 for (pdg = 0, pdadc_i = 0; pdg < pdcurves; pdg++) {
2630 pdadc_tmp = ah->ah_txpower.tmpL[pdg];
2632 if (pdg == pdcurves - 1)
2633 /* 2 dB boundary stretch for last
2634 * (higher power) curve */
2635 gain_boundaries[pdg] = pwr_max[pdg] + 4;
2637 /* Set gain boundary in the middle
2638 * between this curve and the next one */
2639 gain_boundaries[pdg] =
2640 (pwr_max[pdg] + pwr_min[pdg + 1]) / 2;
2642 /* Sanity check in case our 2 db stretch got out of
2644 if (gain_boundaries[pdg] > AR5K_TUNE_MAX_TXPOWER)
2645 gain_boundaries[pdg] = AR5K_TUNE_MAX_TXPOWER;
2647 /* For the first curve (lower power)
2648 * start from 0 dB */
2652 /* For the other curves use the gain overlap */
2653 pdadc_0 = (gain_boundaries[pdg - 1] - pwr_min[pdg]) -
2656 /* Force each power step to be at least 0.5 dB */
2657 if ((pdadc_tmp[1] - pdadc_tmp[0]) > 1)
2658 pwr_step = pdadc_tmp[1] - pdadc_tmp[0];
2662 /* If pdadc_0 is negative, we need to extrapolate
2663 * below this pdgain by a number of pwr_steps */
2664 while ((pdadc_0 < 0) && (pdadc_i < 128)) {
2665 s16 tmp = pdadc_tmp[0] + pdadc_0 * pwr_step;
2666 pdadc_out[pdadc_i++] = (tmp < 0) ? 0 : (u8) tmp;
2670 /* Set last pwr level, using gain boundaries */
2671 pdadc_n = gain_boundaries[pdg] + pd_gain_overlap - pwr_min[pdg];
2672 /* Limit it to be inside pwr range */
2673 table_size = pwr_max[pdg] - pwr_min[pdg];
2674 max_idx = (pdadc_n < table_size) ? pdadc_n : table_size;
2676 /* Fill pdadc_out table */
2677 while (pdadc_0 < max_idx && pdadc_i < 128)
2678 pdadc_out[pdadc_i++] = pdadc_tmp[pdadc_0++];
2680 /* Need to extrapolate above this pdgain? */
2681 if (pdadc_n <= max_idx)
2684 /* Force each power step to be at least 0.5 dB */
2685 if ((pdadc_tmp[table_size - 1] - pdadc_tmp[table_size - 2]) > 1)
2686 pwr_step = pdadc_tmp[table_size - 1] -
2687 pdadc_tmp[table_size - 2];
2691 /* Extrapolate above */
2692 while ((pdadc_0 < (s16) pdadc_n) &&
2693 (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2)) {
2694 s16 tmp = pdadc_tmp[table_size - 1] +
2695 (pdadc_0 - max_idx) * pwr_step;
2696 pdadc_out[pdadc_i++] = (tmp > 127) ? 127 : (u8) tmp;
2701 while (pdg < AR5K_EEPROM_N_PD_GAINS) {
2702 gain_boundaries[pdg] = gain_boundaries[pdg - 1];
2706 while (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2) {
2707 pdadc_out[pdadc_i] = pdadc_out[pdadc_i - 1];
2711 /* Set gain boundaries */
2712 ath5k_hw_reg_write(ah,
2713 AR5K_REG_SM(pd_gain_overlap,
2714 AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP) |
2715 AR5K_REG_SM(gain_boundaries[0],
2716 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_1) |
2717 AR5K_REG_SM(gain_boundaries[1],
2718 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_2) |
2719 AR5K_REG_SM(gain_boundaries[2],
2720 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_3) |
2721 AR5K_REG_SM(gain_boundaries[3],
2722 AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_4),
2725 /* Used for setting rate power table */
2726 ah->ah_txpower.txp_min_idx = pwr_min[0];
2730 /* Write PDADC values on hw */
2732 ath5k_setup_pwr_to_pdadc_table(struct ath5k_hw *ah,
2733 u8 pdcurves, u8 *pdg_to_idx)
2735 u8 *pdadc_out = ah->ah_txpower.txp_pd_table;
2739 /* Select the right pdgain curves */
2741 /* Clear current settings */
2742 reg = ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG1);
2743 reg &= ~(AR5K_PHY_TPC_RG1_PDGAIN_1 |
2744 AR5K_PHY_TPC_RG1_PDGAIN_2 |
2745 AR5K_PHY_TPC_RG1_PDGAIN_3 |
2746 AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
2749 * Use pd_gains curve from eeprom
2751 * This overrides the default setting from initvals
2752 * in case some vendors (e.g. Zcomax) don't use the default
2753 * curves. If we don't honor their settings we 'll get a
2754 * 5dB (1 * gain overlap ?) drop.
2756 reg |= AR5K_REG_SM(pdcurves, AR5K_PHY_TPC_RG1_NUM_PD_GAIN);
2760 reg |= AR5K_REG_SM(pdg_to_idx[2], AR5K_PHY_TPC_RG1_PDGAIN_3);
2763 reg |= AR5K_REG_SM(pdg_to_idx[1], AR5K_PHY_TPC_RG1_PDGAIN_2);
2766 reg |= AR5K_REG_SM(pdg_to_idx[0], AR5K_PHY_TPC_RG1_PDGAIN_1);
2769 ath5k_hw_reg_write(ah, reg, AR5K_PHY_TPC_RG1);
2772 * Write TX power values
2774 for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
2775 ath5k_hw_reg_write(ah,
2776 ((pdadc_out[4*i + 0] & 0xff) << 0) |
2777 ((pdadc_out[4*i + 1] & 0xff) << 8) |
2778 ((pdadc_out[4*i + 2] & 0xff) << 16) |
2779 ((pdadc_out[4*i + 3] & 0xff) << 24),
2780 AR5K_PHY_PDADC_TXPOWER(i));
2786 * Common code for PCDAC/PDADC tables
2790 * This is the main function that uses all of the above
2791 * to set PCDAC/PDADC table on hw for the current channel.
2792 * This table is used for tx power calibration on the basband,
2793 * without it we get weird tx power levels and in some cases
2794 * distorted spectral mask
2797 ath5k_setup_channel_powertable(struct ath5k_hw *ah,
2798 struct ieee80211_channel *channel,
2799 u8 ee_mode, u8 type)
2801 struct ath5k_pdgain_info *pdg_L, *pdg_R;
2802 struct ath5k_chan_pcal_info *pcinfo_L;
2803 struct ath5k_chan_pcal_info *pcinfo_R;
2804 struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
2805 u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode];
2806 s16 table_min[AR5K_EEPROM_N_PD_GAINS];
2807 s16 table_max[AR5K_EEPROM_N_PD_GAINS];
2810 u32 target = channel->center_freq;
2813 /* Get surounding freq piers for this channel */
2814 ath5k_get_chan_pcal_surrounding_piers(ah, channel,
2818 /* Loop over pd gain curves on
2819 * surounding freq piers by index */
2820 for (pdg = 0; pdg < ee->ee_pd_gains[ee_mode]; pdg++) {
2822 /* Fill curves in reverse order
2823 * from lower power (max gain)
2824 * to higher power. Use curve -> idx
2825 * backmapping we did on eeprom init */
2826 u8 idx = pdg_curve_to_idx[pdg];
2828 /* Grab the needed curves by index */
2829 pdg_L = &pcinfo_L->pd_curves[idx];
2830 pdg_R = &pcinfo_R->pd_curves[idx];
2832 /* Initialize the temp tables */
2833 tmpL = ah->ah_txpower.tmpL[pdg];
2834 tmpR = ah->ah_txpower.tmpR[pdg];
2836 /* Set curve's x boundaries and create
2837 * curves so that they cover the same
2838 * range (if we don't do that one table
2839 * will have values on some range and the
2840 * other one won't have any so interpolation
2842 table_min[pdg] = min(pdg_L->pd_pwr[0],
2843 pdg_R->pd_pwr[0]) / 2;
2845 table_max[pdg] = max(pdg_L->pd_pwr[pdg_L->pd_points - 1],
2846 pdg_R->pd_pwr[pdg_R->pd_points - 1]) / 2;
2848 /* Now create the curves on surrounding channels
2849 * and interpolate if needed to get the final
2850 * curve for this gain on this channel */
2852 case AR5K_PWRTABLE_LINEAR_PCDAC:
2853 /* Override min/max so that we don't loose
2854 * accuracy (don't divide by 2) */
2855 table_min[pdg] = min(pdg_L->pd_pwr[0],
2859 max(pdg_L->pd_pwr[pdg_L->pd_points - 1],
2860 pdg_R->pd_pwr[pdg_R->pd_points - 1]);
2862 /* Override minimum so that we don't get
2863 * out of bounds while extrapolating
2864 * below. Don't do this when we have 2
2865 * curves and we are on the high power curve
2866 * because table_min is ok in this case */
2867 if (!(ee->ee_pd_gains[ee_mode] > 1 && pdg == 0)) {
2870 ath5k_get_linear_pcdac_min(pdg_L->pd_step,
2875 /* Don't go too low because we will
2876 * miss the upper part of the curve.
2877 * Note: 126 = 31.5dB (max power supported)
2878 * in 0.25dB units */
2879 if (table_max[pdg] - table_min[pdg] > 126)
2880 table_min[pdg] = table_max[pdg] - 126;
2884 case AR5K_PWRTABLE_PWR_TO_PCDAC:
2885 case AR5K_PWRTABLE_PWR_TO_PDADC:
2887 ath5k_create_power_curve(table_min[pdg],
2891 pdg_L->pd_points, tmpL, type);
2893 /* We are in a calibration
2894 * pier, no need to interpolate
2895 * between freq piers */
2896 if (pcinfo_L == pcinfo_R)
2899 ath5k_create_power_curve(table_min[pdg],
2903 pdg_R->pd_points, tmpR, type);
2909 /* Interpolate between curves
2910 * of surounding freq piers to
2911 * get the final curve for this
2912 * pd gain. Re-use tmpL for interpolation
2914 for (i = 0; (i < (u16) (table_max[pdg] - table_min[pdg])) &&
2915 (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) {
2916 tmpL[i] = (u8) ath5k_get_interpolated_value(target,
2917 (s16) pcinfo_L->freq,
2918 (s16) pcinfo_R->freq,
2924 /* Now we have a set of curves for this
2925 * channel on tmpL (x range is table_max - table_min
2926 * and y values are tmpL[pdg][]) sorted in the same
2927 * order as EEPROM (because we've used the backmapping).
2928 * So for RF5112 it's from higher power to lower power
2929 * and for RF2413 it's from lower power to higher power.
2930 * For RF5111 we only have one curve. */
2932 /* Fill min and max power levels for this
2933 * channel by interpolating the values on
2934 * surounding channels to complete the dataset */
2935 ah->ah_txpower.txp_min_pwr = ath5k_get_interpolated_value(target,
2936 (s16) pcinfo_L->freq,
2937 (s16) pcinfo_R->freq,
2938 pcinfo_L->min_pwr, pcinfo_R->min_pwr);
2940 ah->ah_txpower.txp_max_pwr = ath5k_get_interpolated_value(target,
2941 (s16) pcinfo_L->freq,
2942 (s16) pcinfo_R->freq,
2943 pcinfo_L->max_pwr, pcinfo_R->max_pwr);
2945 /* We are ready to go, fill PCDAC/PDADC
2946 * table and write settings on hardware */
2948 case AR5K_PWRTABLE_LINEAR_PCDAC:
2949 /* For RF5112 we can have one or two curves
2950 * and each curve covers a certain power lvl
2951 * range so we need to do some more processing */
2952 ath5k_combine_linear_pcdac_curves(ah, table_min, table_max,
2953 ee->ee_pd_gains[ee_mode]);
2955 /* Set txp.offset so that we can
2956 * match max power value with max
2958 ah->ah_txpower.txp_offset = 64 - (table_max[0] / 2);
2960 /* Write settings on hw */
2961 ath5k_setup_pcdac_table(ah);
2963 case AR5K_PWRTABLE_PWR_TO_PCDAC:
2964 /* We are done for RF5111 since it has only
2965 * one curve, just fit the curve on the table */
2966 ath5k_fill_pwr_to_pcdac_table(ah, table_min, table_max);
2968 /* No rate powertable adjustment for RF5111 */
2969 ah->ah_txpower.txp_min_idx = 0;
2970 ah->ah_txpower.txp_offset = 0;
2972 /* Write settings on hw */
2973 ath5k_setup_pcdac_table(ah);
2975 case AR5K_PWRTABLE_PWR_TO_PDADC:
2976 /* Set PDADC boundaries and fill
2977 * final PDADC table */
2978 ath5k_combine_pwr_to_pdadc_curves(ah, table_min, table_max,
2979 ee->ee_pd_gains[ee_mode]);
2981 /* Write settings on hw */
2982 ath5k_setup_pwr_to_pdadc_table(ah, pdg, pdg_curve_to_idx);
2984 /* Set txp.offset, note that table_min
2985 * can be negative */
2986 ah->ah_txpower.txp_offset = table_min[0];
2997 * Per-rate tx power setting
2999 * This is the code that sets the desired tx power (below
3000 * maximum) on hw for each rate (we also have TPC that sets
3001 * power per packet). We do that by providing an index on the
3002 * PCDAC/PDADC table we set up.
3006 * Set rate power table
3008 * For now we only limit txpower based on maximum tx power
3009 * supported by hw (what's inside rate_info). We need to limit
3010 * this even more, based on regulatory domain etc.
3012 * Rate power table contains indices to PCDAC/PDADC table (0.5dB steps)
3013 * and is indexed as follows:
3014 * rates[0] - rates[7] -> OFDM rates
3015 * rates[8] - rates[14] -> CCK rates
3016 * rates[15] -> XR rates (they all have the same power)
3019 ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr,
3020 struct ath5k_rate_pcal_info *rate_info,
3026 /* max_pwr is power level we got from driver/user in 0.5dB
3027 * units, switch to 0.25dB units so we can compare */
3029 max_pwr = min(max_pwr, (u16) ah->ah_txpower.txp_max_pwr) / 2;
3031 /* apply rate limits */
3032 rates = ah->ah_txpower.txp_rates_power_table;
3034 /* OFDM rates 6 to 24Mb/s */
3035 for (i = 0; i < 5; i++)
3036 rates[i] = min(max_pwr, rate_info->target_power_6to24);
3038 /* Rest OFDM rates */
3039 rates[5] = min(rates[0], rate_info->target_power_36);
3040 rates[6] = min(rates[0], rate_info->target_power_48);
3041 rates[7] = min(rates[0], rate_info->target_power_54);
3045 rates[8] = min(rates[0], rate_info->target_power_6to24);
3047 rates[9] = min(rates[0], rate_info->target_power_36);
3049 rates[10] = min(rates[0], rate_info->target_power_36);
3051 rates[11] = min(rates[0], rate_info->target_power_48);
3053 rates[12] = min(rates[0], rate_info->target_power_48);
3055 rates[13] = min(rates[0], rate_info->target_power_54);
3057 rates[14] = min(rates[0], rate_info->target_power_54);
3060 rates[15] = min(rates[0], rate_info->target_power_6to24);
3062 /* CCK rates have different peak to average ratio
3063 * so we have to tweak their power so that gainf
3064 * correction works ok. For this we use OFDM to
3065 * CCK delta from eeprom */
3066 if ((ee_mode == AR5K_EEPROM_MODE_11G) &&
3067 (ah->ah_phy_revision < AR5K_SREV_PHY_5212A))
3068 for (i = 8; i <= 15; i++)
3069 rates[i] -= ah->ah_txpower.txp_cck_ofdm_gainf_delta;
3071 /* Now that we have all rates setup use table offset to
3072 * match the power range set by user with the power indices
3073 * on PCDAC/PDADC table */
3074 for (i = 0; i < 16; i++) {
3075 rates[i] += ah->ah_txpower.txp_offset;
3076 /* Don't get out of bounds */
3081 /* Min/max in 0.25dB units */
3082 ah->ah_txpower.txp_min_pwr = 2 * rates[7];
3083 ah->ah_txpower.txp_max_pwr = 2 * rates[0];
3084 ah->ah_txpower.txp_ofdm = rates[7];
3089 * Set transmission power
3092 ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
3093 u8 ee_mode, u8 txpower)
3095 struct ath5k_rate_pcal_info rate_info;
3099 if (txpower > AR5K_TUNE_MAX_TXPOWER) {
3100 ATH5K_ERR(ah->ah_sc, "invalid tx power: %u\n", txpower);
3104 /* Reset TX power values */
3105 memset(&ah->ah_txpower, 0, sizeof(ah->ah_txpower));
3106 ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER;
3107 ah->ah_txpower.txp_min_pwr = 0;
3108 ah->ah_txpower.txp_max_pwr = AR5K_TUNE_MAX_TXPOWER;
3110 /* Initialize TX power table */
3111 switch (ah->ah_radio) {
3113 type = AR5K_PWRTABLE_PWR_TO_PCDAC;
3116 type = AR5K_PWRTABLE_LINEAR_PCDAC;
3123 type = AR5K_PWRTABLE_PWR_TO_PDADC;
3129 /* FIXME: Only on channel/mode change */
3130 ret = ath5k_setup_channel_powertable(ah, channel, ee_mode, type);
3134 /* Limit max power if we have a CTL available */
3135 ath5k_get_max_ctl_power(ah, channel);
3137 /* FIXME: Antenna reduction stuff */
3139 /* FIXME: Limit power on turbo modes */
3141 /* FIXME: TPC scale reduction */
3143 /* Get surounding channels for per-rate power table
3145 ath5k_get_rate_pcal_data(ah, channel, &rate_info);
3147 /* Setup rate power table */
3148 ath5k_setup_rate_powertable(ah, txpower, &rate_info, ee_mode);
3150 /* Write rate power table on hw */
3151 ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(3, 24) |
3152 AR5K_TXPOWER_OFDM(2, 16) | AR5K_TXPOWER_OFDM(1, 8) |
3153 AR5K_TXPOWER_OFDM(0, 0), AR5K_PHY_TXPOWER_RATE1);
3155 ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(7, 24) |
3156 AR5K_TXPOWER_OFDM(6, 16) | AR5K_TXPOWER_OFDM(5, 8) |
3157 AR5K_TXPOWER_OFDM(4, 0), AR5K_PHY_TXPOWER_RATE2);
3159 ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(10, 24) |
3160 AR5K_TXPOWER_CCK(9, 16) | AR5K_TXPOWER_CCK(15, 8) |
3161 AR5K_TXPOWER_CCK(8, 0), AR5K_PHY_TXPOWER_RATE3);
3163 ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(14, 24) |
3164 AR5K_TXPOWER_CCK(13, 16) | AR5K_TXPOWER_CCK(12, 8) |
3165 AR5K_TXPOWER_CCK(11, 0), AR5K_PHY_TXPOWER_RATE4);
3167 /* FIXME: TPC support */
3168 if (ah->ah_txpower.txp_tpc) {
3169 ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX_TPC_ENABLE |
3170 AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
3172 ath5k_hw_reg_write(ah,
3173 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_ACK) |
3174 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CTS) |
3175 AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CHIRP),
3178 ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX |
3179 AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
3185 int ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, u8 txpower)
3188 struct ieee80211_channel *channel = ah->ah_current_channel;
3191 switch (channel->hw_value & CHANNEL_MODES) {
3195 ee_mode = AR5K_EEPROM_MODE_11A;
3199 ee_mode = AR5K_EEPROM_MODE_11G;
3202 ee_mode = AR5K_EEPROM_MODE_11B;
3205 ATH5K_ERR(ah->ah_sc,
3206 "invalid channel: %d\n", channel->center_freq);
3210 ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_TXPOWER,
3211 "changing txpower to %d\n", txpower);
3213 return ath5k_hw_txpower(ah, channel, ee_mode, txpower);
3220 int ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
3221 u8 mode, u8 ee_mode, u8 freq)
3229 * 5211/5212 Specific
3231 if (ah->ah_version != AR5K_AR5210) {
3234 * Write initial RF gain settings
3235 * This should work for both 5111/5112
3237 ret = ath5k_hw_rfgain_init(ah, freq);
3246 ret = ath5k_hw_txpower(ah, channel, ee_mode,
3247 ah->ah_txpower.txp_max_pwr / 2);
3254 ret = ath5k_hw_rfregs_init(ah, channel, mode);
3259 /* Write OFDM timings on 5212*/
3260 if (ah->ah_version == AR5K_AR5212 &&
3261 channel->hw_value & CHANNEL_OFDM) {
3263 ret = ath5k_hw_write_ofdm_timings(ah, channel);
3267 /* Spur info is available only from EEPROM versions
3268 * greater than 5.3, but the EEPROM routines will use
3269 * static values for older versions */
3270 if (ah->ah_mac_srev >= AR5K_SREV_AR5424)
3271 ath5k_hw_set_spur_mitigation_filter(ah,
3275 /*Enable/disable 802.11b mode on 5111
3276 (enable 2111 frequency converter + CCK)*/
3277 if (ah->ah_radio == AR5K_RF5111) {
3278 if (mode == AR5K_MODE_11B)
3279 AR5K_REG_ENABLE_BITS(ah, AR5K_TXCFG,
3282 AR5K_REG_DISABLE_BITS(ah, AR5K_TXCFG,
3288 * For 5210 we do all initialization using
3289 * initvals, so we don't have to modify
3290 * any settings (5210 also only supports
3294 /* Disable phy and wait */
3295 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT);
3299 /* Set channel on PHY */
3300 ret = ath5k_hw_channel(ah, channel);
3305 * Enable the PHY and wait until completion
3306 * This includes BaseBand and Synthesizer
3309 ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
3312 * On 5211+ read activation -> rx delay
3315 * TODO: Half/quarter rate support
3317 if (ah->ah_version != AR5K_AR5210) {
3319 delay = ath5k_hw_reg_read(ah, AR5K_PHY_RX_DELAY) &
3320 AR5K_PHY_RX_DELAY_M;
3321 delay = (channel->hw_value & CHANNEL_CCK) ?
3322 ((delay << 2) / 22) : (delay / 10);
3324 udelay(100 + (2 * delay));
3330 * Perform ADC test to see if baseband is ready
3331 * Set TX hold and check ADC test register
3333 phy_tst1 = ath5k_hw_reg_read(ah, AR5K_PHY_TST1);
3334 ath5k_hw_reg_write(ah, AR5K_PHY_TST1_TXHOLD, AR5K_PHY_TST1);
3335 for (i = 0; i <= 20; i++) {
3336 if (!(ath5k_hw_reg_read(ah, AR5K_PHY_ADC_TEST) & 0x10))
3340 ath5k_hw_reg_write(ah, phy_tst1, AR5K_PHY_TST1);
3343 * Start automatic gain control calibration
3345 * During AGC calibration RX path is re-routed to
3346 * a power detector so we don't receive anything.
3348 * This method is used to calibrate some static offsets
3349 * used together with on-the fly I/Q calibration (the
3350 * one performed via ath5k_hw_phy_calibrate), which doesn't
3351 * interrupt rx path.
3353 * While rx path is re-routed to the power detector we also
3354 * start a noise floor calibration to measure the
3355 * card's noise floor (the noise we measure when we are not
3356 * transmitting or receiving anything).
3358 * If we are in a noisy environment, AGC calibration may time
3359 * out and/or noise floor calibration might timeout.
3361 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
3362 AR5K_PHY_AGCCTL_CAL | AR5K_PHY_AGCCTL_NF);
3364 /* At the same time start I/Q calibration for QAM constellation
3365 * -no need for CCK- */
3366 ah->ah_calibration = false;
3367 if (!(mode == AR5K_MODE_11B)) {
3368 ah->ah_calibration = true;
3369 AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
3370 AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
3371 AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
3375 /* Wait for gain calibration to finish (we check for I/Q calibration
3376 * during ath5k_phy_calibrate) */
3377 if (ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
3378 AR5K_PHY_AGCCTL_CAL, 0, false)) {
3379 ATH5K_ERR(ah->ah_sc, "gain calibration timeout (%uMHz)\n",
3380 channel->center_freq);
3383 /* Restore antenna mode */
3384 ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode);