2 * Copyright (c) 2010-2011 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <linux/export.h>
19 #include "ar9003_phy.h"
21 void ar9003_paprd_enable(struct ath_hw *ah, bool val)
23 struct ath9k_channel *chan = ah->curchan;
24 struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
27 * 3 bits for modalHeader5G.papdRateMaskHt20
28 * is used for sub-band disabling of PAPRD.
29 * 5G band is divided into 3 sub-bands -- upper,
31 * if bit 30 of modalHeader5G.papdRateMaskHt20 is set
32 * -- disable PAPRD for upper band 5GHz
33 * if bit 29 of modalHeader5G.papdRateMaskHt20 is set
34 * -- disable PAPRD for middle band 5GHz
35 * if bit 28 of modalHeader5G.papdRateMaskHt20 is set
36 * -- disable PAPRD for lower band 5GHz
39 if (IS_CHAN_5GHZ(chan)) {
40 if (chan->channel >= UPPER_5G_SUB_BAND_START) {
41 if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
44 } else if (chan->channel >= MID_5G_SUB_BAND_START) {
45 if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
49 if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
56 ah->paprd_table_write_done = true;
57 ath9k_hw_apply_txpower(ah, chan);
60 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B0,
61 AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
62 if (ah->caps.tx_chainmask & BIT(1))
63 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B1,
64 AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
65 if (ah->caps.tx_chainmask & BIT(2))
66 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B2,
67 AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
69 EXPORT_SYMBOL(ar9003_paprd_enable);
71 static int ar9003_get_training_power_2g(struct ath_hw *ah)
73 struct ath9k_channel *chan = ah->curchan;
74 unsigned int power, scale, delta;
76 scale = ar9003_get_paprd_scale_factor(ah, chan);
77 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5,
78 AR_PHY_POWERTX_RATE5_POWERTXHT20_0);
80 delta = abs((int) ah->paprd_target_power - (int) power);
90 static int ar9003_get_training_power_5g(struct ath_hw *ah)
92 struct ath_common *common = ath9k_hw_common(ah);
93 struct ath9k_channel *chan = ah->curchan;
94 unsigned int power, scale, delta;
96 scale = ar9003_get_paprd_scale_factor(ah, chan);
98 if (IS_CHAN_HT40(chan))
99 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE8,
100 AR_PHY_POWERTX_RATE8_POWERTXHT40_5);
102 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE6,
103 AR_PHY_POWERTX_RATE6_POWERTXHT20_5);
106 delta = abs((int) ah->paprd_target_power - (int) power);
110 switch (get_streams(ah->txchainmask)) {
122 ath_dbg(common, ATH_DBG_CALIBRATE,
123 "Invalid tx-chainmask: %u\n", ah->txchainmask);
130 static int ar9003_paprd_setup_single_table(struct ath_hw *ah)
132 struct ath_common *common = ath9k_hw_common(ah);
133 static const u32 ctrl0[3] = {
134 AR_PHY_PAPRD_CTRL0_B0,
135 AR_PHY_PAPRD_CTRL0_B1,
136 AR_PHY_PAPRD_CTRL0_B2
138 static const u32 ctrl1[3] = {
139 AR_PHY_PAPRD_CTRL1_B0,
140 AR_PHY_PAPRD_CTRL1_B1,
141 AR_PHY_PAPRD_CTRL1_B2
146 if (IS_CHAN_2GHZ(ah->curchan))
147 training_power = ar9003_get_training_power_2g(ah);
149 training_power = ar9003_get_training_power_5g(ah);
151 ath_dbg(common, ATH_DBG_CALIBRATE,
152 "Training power: %d, Target power: %d\n",
153 training_power, ah->paprd_target_power);
155 if (training_power < 0) {
156 ath_dbg(common, ATH_DBG_CALIBRATE,
157 "PAPRD target power delta out of range");
160 ah->paprd_training_power = training_power;
162 REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK,
164 REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK,
166 REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK,
167 ah->paprd_ratemask_ht40);
169 for (i = 0; i < ah->caps.max_txchains; i++) {
170 REG_RMW_FIELD(ah, ctrl0[i],
171 AR_PHY_PAPRD_CTRL0_USE_SINGLE_TABLE_MASK, 1);
172 REG_RMW_FIELD(ah, ctrl1[i],
173 AR_PHY_PAPRD_CTRL1_ADAPTIVE_AM2PM_ENABLE, 1);
174 REG_RMW_FIELD(ah, ctrl1[i],
175 AR_PHY_PAPRD_CTRL1_ADAPTIVE_AM2AM_ENABLE, 1);
176 REG_RMW_FIELD(ah, ctrl1[i],
177 AR_PHY_PAPRD_CTRL1_ADAPTIVE_SCALING_ENA, 0);
178 REG_RMW_FIELD(ah, ctrl1[i],
179 AR_PHY_PAPRD_CTRL1_PA_GAIN_SCALE_FACT_MASK, 181);
180 REG_RMW_FIELD(ah, ctrl1[i],
181 AR_PHY_PAPRD_CTRL1_PAPRD_MAG_SCALE_FACT, 361);
182 REG_RMW_FIELD(ah, ctrl1[i],
183 AR_PHY_PAPRD_CTRL1_ADAPTIVE_SCALING_ENA, 0);
184 REG_RMW_FIELD(ah, ctrl0[i],
185 AR_PHY_PAPRD_CTRL0_PAPRD_MAG_THRSH, 3);
188 ar9003_paprd_enable(ah, false);
190 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
191 AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_LB_SKIP, 0x30);
192 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
193 AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_LB_ENABLE, 1);
194 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
195 AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_TX_GAIN_FORCE, 1);
196 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
197 AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_RX_BB_GAIN_FORCE, 0);
198 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
199 AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_IQCORR_ENABLE, 0);
200 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
201 AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_AGC2_SETTLING, 28);
202 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1,
203 AR_PHY_PAPRD_TRAINER_CNTL1_CF_CF_PAPRD_TRAIN_ENABLE, 1);
204 val = AR_SREV_9462(ah) ? 0x91 : 147;
205 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL2,
206 AR_PHY_PAPRD_TRAINER_CNTL2_CF_PAPRD_INIT_RX_BB_GAIN, val);
207 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
208 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_FINE_CORR_LEN, 4);
209 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
210 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_COARSE_CORR_LEN, 4);
211 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
212 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_NUM_CORR_STAGES, 7);
213 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
214 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_MIN_LOOPBACK_DEL, 1);
215 if (AR_SREV_9485(ah) || AR_SREV_9462(ah))
216 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
217 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP,
220 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
221 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP,
223 val = AR_SREV_9462(ah) ? -10 : -15;
224 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
225 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_ADC_DESIRED_SIZE,
227 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
228 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_BBTXMIX_DISABLE, 1);
229 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4,
230 AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_SAFETY_DELTA, 0);
231 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4,
232 AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_MIN_CORR, 400);
233 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4,
234 AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_NUM_TRAIN_SAMPLES,
236 REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_0_B0,
237 AR_PHY_PAPRD_PRE_POST_SCALING, 261376);
238 REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_1_B0,
239 AR_PHY_PAPRD_PRE_POST_SCALING, 248079);
240 REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_2_B0,
241 AR_PHY_PAPRD_PRE_POST_SCALING, 233759);
242 REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_3_B0,
243 AR_PHY_PAPRD_PRE_POST_SCALING, 220464);
244 REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_4_B0,
245 AR_PHY_PAPRD_PRE_POST_SCALING, 208194);
246 REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_5_B0,
247 AR_PHY_PAPRD_PRE_POST_SCALING, 196949);
248 REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_6_B0,
249 AR_PHY_PAPRD_PRE_POST_SCALING, 185706);
250 REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_7_B0,
251 AR_PHY_PAPRD_PRE_POST_SCALING, 175487);
255 static void ar9003_paprd_get_gain_table(struct ath_hw *ah)
257 u32 *entry = ah->paprd_gain_table_entries;
258 u8 *index = ah->paprd_gain_table_index;
259 u32 reg = AR_PHY_TXGAIN_TABLE;
262 memset(entry, 0, sizeof(ah->paprd_gain_table_entries));
263 memset(index, 0, sizeof(ah->paprd_gain_table_index));
265 for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
266 entry[i] = REG_READ(ah, reg);
267 index[i] = (entry[i] >> 24) & 0xff;
272 static unsigned int ar9003_get_desired_gain(struct ath_hw *ah, int chain,
275 int olpc_gain_delta = 0, cl_gain_mod;
276 int alpha_therm, alpha_volt;
277 int therm_cal_value, volt_cal_value;
278 int therm_value, volt_value;
279 int thermal_gain_corr, voltage_gain_corr;
280 int desired_scale, desired_gain = 0;
281 u32 reg_olpc = 0, reg_cl_gain = 0;
283 REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
284 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
285 desired_scale = REG_READ_FIELD(ah, AR_PHY_TPC_12,
286 AR_PHY_TPC_12_DESIRED_SCALE_HT40_5);
287 alpha_therm = REG_READ_FIELD(ah, AR_PHY_TPC_19,
288 AR_PHY_TPC_19_ALPHA_THERM);
289 alpha_volt = REG_READ_FIELD(ah, AR_PHY_TPC_19,
290 AR_PHY_TPC_19_ALPHA_VOLT);
291 therm_cal_value = REG_READ_FIELD(ah, AR_PHY_TPC_18,
292 AR_PHY_TPC_18_THERM_CAL_VALUE);
293 volt_cal_value = REG_READ_FIELD(ah, AR_PHY_TPC_18,
294 AR_PHY_TPC_18_VOLT_CAL_VALUE);
295 therm_value = REG_READ_FIELD(ah, AR_PHY_BB_THERM_ADC_4,
296 AR_PHY_BB_THERM_ADC_4_LATEST_THERM_VALUE);
297 volt_value = REG_READ_FIELD(ah, AR_PHY_BB_THERM_ADC_4,
298 AR_PHY_BB_THERM_ADC_4_LATEST_VOLT_VALUE);
302 reg_olpc = AR_PHY_TPC_11_B0;
303 reg_cl_gain = AR_PHY_CL_TAB_0;
306 reg_olpc = AR_PHY_TPC_11_B1;
307 reg_cl_gain = AR_PHY_CL_TAB_1;
310 reg_olpc = AR_PHY_TPC_11_B2;
311 reg_cl_gain = AR_PHY_CL_TAB_2;
314 ath_dbg(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
315 "Invalid chainmask: %d\n", chain);
319 olpc_gain_delta = REG_READ_FIELD(ah, reg_olpc,
320 AR_PHY_TPC_11_OLPC_GAIN_DELTA);
321 cl_gain_mod = REG_READ_FIELD(ah, reg_cl_gain,
322 AR_PHY_CL_TAB_CL_GAIN_MOD);
324 if (olpc_gain_delta >= 128)
325 olpc_gain_delta = olpc_gain_delta - 256;
327 thermal_gain_corr = (alpha_therm * (therm_value - therm_cal_value) +
329 voltage_gain_corr = (alpha_volt * (volt_value - volt_cal_value) +
331 desired_gain = target_power - olpc_gain_delta - thermal_gain_corr -
332 voltage_gain_corr + desired_scale + cl_gain_mod;
337 static void ar9003_tx_force_gain(struct ath_hw *ah, unsigned int gain_index)
339 int selected_gain_entry, txbb1dbgain, txbb6dbgain, txmxrgain;
340 int padrvgnA, padrvgnB, padrvgnC, padrvgnD;
341 u32 *gain_table_entries = ah->paprd_gain_table_entries;
343 selected_gain_entry = gain_table_entries[gain_index];
344 txbb1dbgain = selected_gain_entry & 0x7;
345 txbb6dbgain = (selected_gain_entry >> 3) & 0x3;
346 txmxrgain = (selected_gain_entry >> 5) & 0xf;
347 padrvgnA = (selected_gain_entry >> 9) & 0xf;
348 padrvgnB = (selected_gain_entry >> 13) & 0xf;
349 padrvgnC = (selected_gain_entry >> 17) & 0xf;
350 padrvgnD = (selected_gain_entry >> 21) & 0x3;
352 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
353 AR_PHY_TX_FORCED_GAIN_FORCED_TXBB1DBGAIN, txbb1dbgain);
354 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
355 AR_PHY_TX_FORCED_GAIN_FORCED_TXBB6DBGAIN, txbb6dbgain);
356 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
357 AR_PHY_TX_FORCED_GAIN_FORCED_TXMXRGAIN, txmxrgain);
358 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
359 AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNA, padrvgnA);
360 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
361 AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNB, padrvgnB);
362 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
363 AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNC, padrvgnC);
364 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
365 AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGND, padrvgnD);
366 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
367 AR_PHY_TX_FORCED_GAIN_FORCED_ENABLE_PAL, 0);
368 REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN,
369 AR_PHY_TX_FORCED_GAIN_FORCE_TX_GAIN, 0);
370 REG_RMW_FIELD(ah, AR_PHY_TPC_1, AR_PHY_TPC_1_FORCED_DAC_GAIN, 0);
371 REG_RMW_FIELD(ah, AR_PHY_TPC_1, AR_PHY_TPC_1_FORCE_DAC_GAIN, 0);
374 static inline int find_expn(int num)
379 static inline int find_proper_scale(int expn, int N)
381 return (expn > N) ? expn - 10 : 0;
386 static bool create_pa_curve(u32 *data_L, u32 *data_U, u32 *pa_table, u16 *gain)
388 unsigned int thresh_accum_cnt;
389 int x_est[NUM_BIN + 1], Y[NUM_BIN + 1], theta[NUM_BIN + 1];
390 int PA_in[NUM_BIN + 1];
391 int B1_tmp[NUM_BIN + 1], B2_tmp[NUM_BIN + 1];
392 unsigned int B1_abs_max, B2_abs_max;
393 int max_index, scale_factor;
394 int y_est[NUM_BIN + 1];
395 int x_est_fxp1_nonlin, x_tilde[NUM_BIN + 1];
396 unsigned int x_tilde_abs;
397 int G_fxp, Y_intercept, order_x_by_y, M, I, L, sum_y_sqr, sum_y_quad;
398 int Q_x, Q_B1, Q_B2, beta_raw, alpha_raw, scale_B;
399 int Q_scale_B, Q_beta, Q_alpha, alpha, beta, order_1, order_2;
400 int order1_5x, order2_3x, order1_5x_rem, order2_3x_rem;
402 int theta_low_bin = 0;
405 /* disregard any bin that contains <= 16 samples */
406 thresh_accum_cnt = 16;
409 memset(theta, 0, sizeof(theta));
410 memset(x_est, 0, sizeof(x_est));
411 memset(Y, 0, sizeof(Y));
412 memset(y_est, 0, sizeof(y_est));
413 memset(x_tilde, 0, sizeof(x_tilde));
415 for (i = 0; i < NUM_BIN; i++) {
416 s32 accum_cnt, accum_tx, accum_rx, accum_ang;
418 /* number of samples */
419 accum_cnt = data_L[i] & 0xffff;
421 if (accum_cnt <= thresh_accum_cnt)
424 /* sum(tx amplitude) */
425 accum_tx = ((data_L[i] >> 16) & 0xffff) |
426 ((data_U[i] & 0x7ff) << 16);
428 /* sum(rx amplitude distance to lower bin edge) */
429 accum_rx = ((data_U[i] >> 11) & 0x1f) |
430 ((data_L[i + 23] & 0xffff) << 5);
433 accum_ang = ((data_L[i + 23] >> 16) & 0xffff) |
434 ((data_U[i + 23] & 0x7ff) << 16);
436 accum_tx <<= scale_factor;
437 accum_rx <<= scale_factor;
438 x_est[i + 1] = (((accum_tx + accum_cnt) / accum_cnt) + 32) >>
441 Y[i + 1] = ((((accum_rx + accum_cnt) / accum_cnt) + 32) >>
443 (1 << scale_factor) * max_index + 16;
445 if (accum_ang >= (1 << 26))
446 accum_ang -= 1 << 27;
448 theta[i + 1] = ((accum_ang * (1 << scale_factor)) + accum_cnt) /
455 * Find average theta of first 5 bin and all of those to same value.
456 * Curve is linear at that range.
458 for (i = 1; i < 6; i++)
459 theta_low_bin += theta[i];
461 theta_low_bin = theta_low_bin / 5;
462 for (i = 1; i < 6; i++)
463 theta[i] = theta_low_bin;
465 /* Set values at origin */
466 theta[0] = theta_low_bin;
467 for (i = 0; i <= max_index; i++)
468 theta[i] -= theta_low_bin;
474 /* low signal gain */
475 if (x_est[6] == x_est[3])
479 (((Y[6] - Y[3]) * 1 << scale_factor) +
480 (x_est[6] - x_est[3])) / (x_est[6] - x_est[3]);
482 /* prevent division by zero */
487 (G_fxp * (x_est[0] - x_est[3]) +
488 (1 << scale_factor)) / (1 << scale_factor) + Y[3];
490 for (i = 0; i <= max_index; i++)
491 y_est[i] = Y[i] - Y_intercept;
493 for (i = 0; i <= 3; i++) {
495 x_est[i] = ((y_est[i] * 1 << scale_factor) + G_fxp) / G_fxp;
498 if (y_est[max_index] == 0)
502 x_est[max_index] - ((1 << scale_factor) * y_est[max_index] +
506 (x_est_fxp1_nonlin + y_est[max_index]) / y_est[max_index];
508 if (order_x_by_y == 0)
510 else if (order_x_by_y == 1)
515 I = (max_index > 15) ? 7 : max_index >> 1;
522 for (i = 0; i <= L; i++) {
525 unsigned int tmp_abs;
527 /* prevent division by zero */
528 if (y_est[i + I] == 0)
532 x_est[i + I] - ((1 << scale_factor) * y_est[i + I] +
536 (x_est_fxp1_nonlin * (1 << M) + y_est[i + I]) / y_est[i +
539 (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
541 (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
543 (y_est[i + I] * y_est[i + I] +
544 (scale_factor * scale_factor)) / (scale_factor *
546 tmp_abs = abs(x_tilde[i]);
547 if (tmp_abs > x_tilde_abs)
548 x_tilde_abs = tmp_abs;
550 y_quad = y_sqr * y_sqr;
551 sum_y_sqr = sum_y_sqr + y_sqr;
552 sum_y_quad = sum_y_quad + y_quad;
553 B1_tmp[i] = y_sqr * (L + 1);
559 for (i = 0; i <= L; i++) {
562 B1_tmp[i] -= sum_y_sqr;
563 B2_tmp[i] = sum_y_quad - sum_y_sqr * B2_tmp[i];
565 abs_val = abs(B1_tmp[i]);
566 if (abs_val > B1_abs_max)
567 B1_abs_max = abs_val;
569 abs_val = abs(B2_tmp[i]);
570 if (abs_val > B2_abs_max)
571 B2_abs_max = abs_val;
574 Q_x = find_proper_scale(find_expn(x_tilde_abs), 10);
575 Q_B1 = find_proper_scale(find_expn(B1_abs_max), 10);
576 Q_B2 = find_proper_scale(find_expn(B2_abs_max), 10);
580 for (i = 0; i <= L; i++) {
581 x_tilde[i] = x_tilde[i] / (1 << Q_x);
582 B1_tmp[i] = B1_tmp[i] / (1 << Q_B1);
583 B2_tmp[i] = B2_tmp[i] / (1 << Q_B2);
584 beta_raw = beta_raw + B1_tmp[i] * x_tilde[i];
585 alpha_raw = alpha_raw + B2_tmp[i] * x_tilde[i];
589 ((sum_y_quad / scale_factor) * (L + 1) -
590 (sum_y_sqr / scale_factor) * sum_y_sqr) * scale_factor;
592 Q_scale_B = find_proper_scale(find_expn(abs(scale_B)), 10);
593 scale_B = scale_B / (1 << Q_scale_B);
596 Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10);
597 Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10);
598 beta_raw = beta_raw / (1 << Q_beta);
599 alpha_raw = alpha_raw / (1 << Q_alpha);
600 alpha = (alpha_raw << 10) / scale_B;
601 beta = (beta_raw << 10) / scale_B;
602 order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B;
603 order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B;
604 order1_5x = order_1 / 5;
605 order2_3x = order_2 / 3;
606 order1_5x_rem = order_1 - 5 * order1_5x;
607 order2_3x_rem = order_2 - 3 * order2_3x;
609 for (i = 0; i < PAPRD_TABLE_SZ; i++) {
611 y5 = ((beta * tmp) >> 6) >> order1_5x;
612 y5 = (y5 * tmp) >> order1_5x;
613 y5 = (y5 * tmp) >> order1_5x;
614 y5 = (y5 * tmp) >> order1_5x;
615 y5 = (y5 * tmp) >> order1_5x;
616 y5 = y5 >> order1_5x_rem;
617 y3 = (alpha * tmp) >> order2_3x;
618 y3 = (y3 * tmp) >> order2_3x;
619 y3 = (y3 * tmp) >> order2_3x;
620 y3 = y3 >> order2_3x_rem;
621 PA_in[i] = y5 + y3 + (256 * tmp) / G_fxp;
624 tmp = PA_in[i] - PA_in[i - 1];
627 PA_in[i - 1] + (PA_in[i - 1] -
631 PA_in[i] = (PA_in[i] < 1400) ? PA_in[i] : 1400;
637 for (i = 0; i <= L; i++) {
639 ((theta[i + I] << M) + y_est[i + I]) / y_est[i + I];
641 ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
643 ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
644 beta_raw = beta_raw + B1_tmp[i] * theta_tilde;
645 alpha_raw = alpha_raw + B2_tmp[i] * theta_tilde;
648 Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10);
649 Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10);
650 beta_raw = beta_raw / (1 << Q_beta);
651 alpha_raw = alpha_raw / (1 << Q_alpha);
653 alpha = (alpha_raw << 10) / scale_B;
654 beta = (beta_raw << 10) / scale_B;
655 order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B + 5;
656 order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B + 5;
657 order1_5x = order_1 / 5;
658 order2_3x = order_2 / 3;
659 order1_5x_rem = order_1 - 5 * order1_5x;
660 order2_3x_rem = order_2 - 3 * order2_3x;
662 for (i = 0; i < PAPRD_TABLE_SZ; i++) {
665 /* pa_table[4] is calculated from PA_angle for i=5 */
671 y5 = (((beta * tmp - 64) >> 6) -
672 (1 << order1_5x)) / (1 << order1_5x);
674 y5 = ((((beta * tmp - 64) >> 6) +
675 (1 << order1_5x)) / (1 << order1_5x));
677 y5 = (y5 * tmp) / (1 << order1_5x);
678 y5 = (y5 * tmp) / (1 << order1_5x);
679 y5 = (y5 * tmp) / (1 << order1_5x);
680 y5 = (y5 * tmp) / (1 << order1_5x);
681 y5 = y5 / (1 << order1_5x_rem);
685 (1 << order2_3x)) / (1 << order2_3x);
688 (1 << order2_3x)) / (1 << order2_3x);
689 y3 = (y3 * tmp) / (1 << order2_3x);
690 y3 = (y3 * tmp) / (1 << order2_3x);
691 y3 = y3 / (1 << order2_3x_rem);
699 else if (PA_angle > 150)
703 pa_table[i] = ((PA_in[i] & 0x7ff) << 11) + (PA_angle & 0x7ff);
705 PA_angle = (PA_angle + 2) >> 1;
706 pa_table[i - 1] = ((PA_in[i - 1] & 0x7ff) << 11) +
715 void ar9003_paprd_populate_single_table(struct ath_hw *ah,
716 struct ath9k_hw_cal_data *caldata,
719 u32 *paprd_table_val = caldata->pa_table[chain];
720 u32 small_signal_gain = caldata->small_signal_gain[chain];
721 u32 training_power = ah->paprd_training_power;
726 reg = AR_PHY_PAPRD_MEM_TAB_B0;
728 reg = AR_PHY_PAPRD_MEM_TAB_B1;
730 reg = AR_PHY_PAPRD_MEM_TAB_B2;
732 for (i = 0; i < PAPRD_TABLE_SZ; i++) {
733 REG_WRITE(ah, reg, paprd_table_val[i]);
738 reg = AR_PHY_PA_GAIN123_B0;
740 reg = AR_PHY_PA_GAIN123_B1;
742 reg = AR_PHY_PA_GAIN123_B2;
744 REG_RMW_FIELD(ah, reg, AR_PHY_PA_GAIN123_PA_GAIN1, small_signal_gain);
746 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B0,
747 AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
750 if (ah->caps.tx_chainmask & BIT(1))
751 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B1,
752 AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
755 if (ah->caps.tx_chainmask & BIT(2))
756 /* val AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL correct? */
757 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B2,
758 AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
761 EXPORT_SYMBOL(ar9003_paprd_populate_single_table);
763 int ar9003_paprd_setup_gain_table(struct ath_hw *ah, int chain)
765 unsigned int i, desired_gain, gain_index;
766 unsigned int train_power = ah->paprd_training_power;
768 desired_gain = ar9003_get_desired_gain(ah, chain, train_power);
771 for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
772 if (ah->paprd_gain_table_index[i] >= desired_gain)
777 ar9003_tx_force_gain(ah, gain_index);
779 REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
780 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
784 EXPORT_SYMBOL(ar9003_paprd_setup_gain_table);
786 int ar9003_paprd_create_curve(struct ath_hw *ah,
787 struct ath9k_hw_cal_data *caldata, int chain)
789 u16 *small_signal_gain = &caldata->small_signal_gain[chain];
790 u32 *pa_table = caldata->pa_table[chain];
791 u32 *data_L, *data_U;
796 memset(caldata->pa_table[chain], 0, sizeof(caldata->pa_table[chain]));
798 buf = kmalloc(2 * 48 * sizeof(u32), GFP_ATOMIC);
805 REG_CLR_BIT(ah, AR_PHY_CHAN_INFO_MEMORY,
806 AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
808 reg = AR_PHY_CHAN_INFO_TAB_0;
809 for (i = 0; i < 48; i++)
810 data_L[i] = REG_READ(ah, reg + (i << 2));
812 REG_SET_BIT(ah, AR_PHY_CHAN_INFO_MEMORY,
813 AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
815 for (i = 0; i < 48; i++)
816 data_U[i] = REG_READ(ah, reg + (i << 2));
818 if (!create_pa_curve(data_L, data_U, pa_table, small_signal_gain))
821 REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
822 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
828 EXPORT_SYMBOL(ar9003_paprd_create_curve);
830 int ar9003_paprd_init_table(struct ath_hw *ah)
834 ret = ar9003_paprd_setup_single_table(ah);
838 ar9003_paprd_get_gain_table(ah);
841 EXPORT_SYMBOL(ar9003_paprd_init_table);
843 bool ar9003_paprd_is_done(struct ath_hw *ah)
845 int paprd_done, agc2_pwr;
846 paprd_done = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1,
847 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
849 if (paprd_done == 0x1) {
850 agc2_pwr = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1,
851 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_AGC2_PWR);
853 ath_dbg(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
854 "AGC2_PWR = 0x%x training done = 0x%x\n",
855 agc2_pwr, paprd_done);
857 * agc2_pwr range should not be less than 'IDEAL_AGC2_PWR_CHANGE'
858 * when the training is completely done, otherwise retraining is
859 * done to make sure the value is in ideal range
861 if (agc2_pwr <= PAPRD_IDEAL_AGC2_PWR_RANGE)
867 EXPORT_SYMBOL(ar9003_paprd_is_done);