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Merge tag 'v3.2-rc2' into staging/for_v3.3
[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / ath / ath9k / ar9003_paprd.c
CommitLineData
717f6bed 1/*
5b68138e 2 * Copyright (c) 2010-2011 Atheros Communications Inc.
717f6bed
FF		 3 *
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.
7 *
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.
15 */
16
ee40fa06 17#include <linux/export.h>
717f6bed
FF		 18#include "hw.h"
19#include "ar9003_phy.h"
20
21void ar9003_paprd_enable(struct ath_hw *ah, bool val)
22{
45ef6a0b 23 struct ath9k_channel *chan = ah->curchan;
331c5ea2
MSS		 24 struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;
25
26 /*
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,
30 * middle, lower.
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
37 */
38
39 if (IS_CHAN_5GHZ(chan)) {
40 if (chan->channel >= UPPER_5G_SUB_BAND_START) {
41 if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
42 & BIT(30))
43 val = false;
44 } else if (chan->channel >= MID_5G_SUB_BAND_START) {
45 if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
46 & BIT(29))
47 val = false;
48 } else {
49 if (le32_to_cpu(eep->modalHeader5G.papdRateMaskHt20)
50 & BIT(28))
51 val = false;
52 }
53 }
45ef6a0b
VT		 54
55 if (val) {
56 ah->paprd_table_write_done = true;
ca2c68cc 57 ath9k_hw_apply_txpower(ah, chan);
45ef6a0b
VT		 58 }
59
717f6bed
FF		 60 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B0,
61 AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val);
11441fb8
VT		 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);
717f6bed
FF		 68}
69EXPORT_SYMBOL(ar9003_paprd_enable);
70
1bf38661 71static int ar9003_get_training_power_2g(struct ath_hw *ah)
717f6bed 72{
931749bf 73 struct ath9k_channel *chan = ah->curchan;
1bf38661
FF		 74 unsigned int power, scale, delta;
75
931749bf 76 scale = ar9003_get_paprd_scale_factor(ah, chan);
1bf38661
FF		 77 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5,
78 AR_PHY_POWERTX_RATE5_POWERTXHT20_0);
79
80 delta = abs((int) ah->paprd_target_power - (int) power);
81 if (delta > scale)
82 return -1;
83
84 if (delta < 4)
85 power -= 4 - delta;
86
87 return power;
88}
89
1bf38661
FF		 90static int ar9003_get_training_power_5g(struct ath_hw *ah)
91{
92 struct ath_common *common = ath9k_hw_common(ah);
1bf38661
FF		 93 struct ath9k_channel *chan = ah->curchan;
94 unsigned int power, scale, delta;
95
931749bf 96 scale = ar9003_get_paprd_scale_factor(ah, chan);
1bf38661
FF		 97
98 if (IS_CHAN_HT40(chan))
99 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE8,
100 AR_PHY_POWERTX_RATE8_POWERTXHT40_5);
101 else
102 power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE6,
103 AR_PHY_POWERTX_RATE6_POWERTXHT20_5);
104
105 power += scale;
106 delta = abs((int) ah->paprd_target_power - (int) power);
107 if (delta > scale)
108 return -1;
109
82b2d334 110 switch (get_streams(ah->txchainmask)) {
7952ca5b
MSS		 111 case 1:
112 delta = 6;
113 break;
114 case 2:
115 delta = 4;
116 break;
117 case 3:
118 delta = 2;
119 break;
120 default:
121 delta = 0;
122 ath_dbg(common, ATH_DBG_CALIBRATE,
82b2d334 123 "Invalid tx-chainmask: %u\n", ah->txchainmask);
7952ca5b
MSS		 124 }
125
126 power += delta;
1bf38661
FF		 127 return power;
128}
129
130static int ar9003_paprd_setup_single_table(struct ath_hw *ah)
131{
132 struct ath_common *common = ath9k_hw_common(ah);
07b2fa5a 133 static const u32 ctrl0[3] = {
717f6bed
FF		 134 AR_PHY_PAPRD_CTRL0_B0,
135 AR_PHY_PAPRD_CTRL0_B1,
136 AR_PHY_PAPRD_CTRL0_B2
137 };
07b2fa5a 138 static const u32 ctrl1[3] = {
717f6bed
FF		 139 AR_PHY_PAPRD_CTRL1_B0,
140 AR_PHY_PAPRD_CTRL1_B1,
141 AR_PHY_PAPRD_CTRL1_B2
142 };
1bf38661 143 int training_power;
2577c6e8 144 int i, val;
717f6bed 145
1bf38661
FF		 146 if (IS_CHAN_2GHZ(ah->curchan))
147 training_power = ar9003_get_training_power_2g(ah);
148 else
149 training_power = ar9003_get_training_power_5g(ah);
150
84288044
MSS		 151 ath_dbg(common, ATH_DBG_CALIBRATE,
152 "Training power: %d, Target power: %d\n",
153 training_power, ah->paprd_target_power);
154
1bf38661
FF		 155 if (training_power < 0) {
156 ath_dbg(common, ATH_DBG_CALIBRATE,
157 "PAPRD target power delta out of range");
158 return -ERANGE;
159 }
160 ah->paprd_training_power = training_power;
1bf38661 161
7072bf62
VT		 162 REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK,
163 ah->paprd_ratemask);
164 REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK,
165 ah->paprd_ratemask);
166 REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK,
f1a8abb0 167 ah->paprd_ratemask_ht40);
717f6bed 168
11441fb8 169 for (i = 0; i < ah->caps.max_txchains; i++) {
717f6bed
FF		 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);
186 }
187
188 ar9003_paprd_enable(ah, false);
189
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);
423e38e8 204 val = AR_SREV_9462(ah) ? 0x91 : 147;
717f6bed 205 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL2,
2577c6e8 206 AR_PHY_PAPRD_TRAINER_CNTL2_CF_PAPRD_INIT_RX_BB_GAIN, val);
717f6bed
FF		 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);
423e38e8 215 if (AR_SREV_9485(ah) || AR_SREV_9462(ah))
11441fb8
VT		 216 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
217 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP,
218 -3);
219 else
220 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
221 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP,
222 -6);
423e38e8 223 val = AR_SREV_9462(ah) ? -10 : -15;
717f6bed
FF		 224 REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3,
225 AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_ADC_DESIRED_SIZE,
2577c6e8 226 val);
717f6bed
FF		 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,
235 100);
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);
1bf38661 252 return 0;
717f6bed
FF		 253}
254
255static void ar9003_paprd_get_gain_table(struct ath_hw *ah)
256{
257 u32 *entry = ah->paprd_gain_table_entries;
258 u8 *index = ah->paprd_gain_table_index;
259 u32 reg = AR_PHY_TXGAIN_TABLE;
260 int i;
261
262 memset(entry, 0, sizeof(ah->paprd_gain_table_entries));
263 memset(index, 0, sizeof(ah->paprd_gain_table_index));
264
05b60d4e 265 for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
717f6bed
FF		 266 entry[i] = REG_READ(ah, reg);
267 index[i] = (entry[i] >> 24) & 0xff;
268 reg += 4;
269 }
270}
271
272static unsigned int ar9003_get_desired_gain(struct ath_hw *ah, int chain,
273 int target_power)
274{
f68e20f0 275 int olpc_gain_delta = 0, cl_gain_mod;
717f6bed
FF		 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;
f68e20f0 281 u32 reg_olpc = 0, reg_cl_gain = 0;
717f6bed
FF		 282
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);
299
f68e20f0
MSS		 300 switch (chain) {
301 case 0:
302 reg_olpc = AR_PHY_TPC_11_B0;
303 reg_cl_gain = AR_PHY_CL_TAB_0;
304 break;
305 case 1:
306 reg_olpc = AR_PHY_TPC_11_B1;
307 reg_cl_gain = AR_PHY_CL_TAB_1;
308 break;
309 case 2:
310 reg_olpc = AR_PHY_TPC_11_B2;
311 reg_cl_gain = AR_PHY_CL_TAB_2;
312 break;
313 default:
314 ath_dbg(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
315 "Invalid chainmask: %d\n", chain);
316 break;
317 }
717f6bed 318
f68e20f0 319 olpc_gain_delta = REG_READ_FIELD(ah, reg_olpc,
717f6bed 320 AR_PHY_TPC_11_OLPC_GAIN_DELTA);
f68e20f0
MSS		 321 cl_gain_mod = REG_READ_FIELD(ah, reg_cl_gain,
322 AR_PHY_CL_TAB_CL_GAIN_MOD);
717f6bed
FF		 323
324 if (olpc_gain_delta >= 128)
325 olpc_gain_delta = olpc_gain_delta - 256;
326
327 thermal_gain_corr = (alpha_therm * (therm_value - therm_cal_value) +
328 (256 / 2)) / 256;
329 voltage_gain_corr = (alpha_volt * (volt_value - volt_cal_value) +
330 (128 / 2)) / 128;
331 desired_gain = target_power - olpc_gain_delta - thermal_gain_corr -
f68e20f0 332 voltage_gain_corr + desired_scale + cl_gain_mod;
717f6bed
FF		 333
334 return desired_gain;
335}
336
337static void ar9003_tx_force_gain(struct ath_hw *ah, unsigned int gain_index)
338{
339 int selected_gain_entry, txbb1dbgain, txbb6dbgain, txmxrgain;
340 int padrvgnA, padrvgnB, padrvgnC, padrvgnD;
341 u32 *gain_table_entries = ah->paprd_gain_table_entries;
342
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;
351
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);
372}
373
374static inline int find_expn(int num)
375{
376 return fls(num) - 1;
377}
378
379static inline int find_proper_scale(int expn, int N)
380{
381 return (expn > N) ? expn - 10 : 0;
382}
383
384#define NUM_BIN 23
385
386static bool create_pa_curve(u32 *data_L, u32 *data_U, u32 *pa_table, u16 *gain)
387{
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;
401 int y5, y3, tmp;
402 int theta_low_bin = 0;
403 int i;
404
405 /* disregard any bin that contains <= 16 samples */
406 thresh_accum_cnt = 16;
407 scale_factor = 5;
408 max_index = 0;
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));
414
415 for (i = 0; i < NUM_BIN; i++) {
416 s32 accum_cnt, accum_tx, accum_rx, accum_ang;
417
418 /* number of samples */
419 accum_cnt = data_L[i] & 0xffff;
420
421 if (accum_cnt <= thresh_accum_cnt)
422 continue;
423
424 /* sum(tx amplitude) */
425 accum_tx = ((data_L[i] >> 16) & 0xffff) |
426 ((data_U[i] & 0x7ff) << 16);
427
428 /* sum(rx amplitude distance to lower bin edge) */
429 accum_rx = ((data_U[i] >> 11) & 0x1f) |
430 ((data_L[i + 23] & 0xffff) << 5);
431
432 /* sum(angles) */
433 accum_ang = ((data_L[i + 23] >> 16) & 0xffff) |
434 ((data_U[i + 23] & 0x7ff) << 16);
435
436 accum_tx <<= scale_factor;
437 accum_rx <<= scale_factor;
438 x_est[i + 1] = (((accum_tx + accum_cnt) / accum_cnt) + 32) >>
439 scale_factor;
440
441 Y[i + 1] = ((((accum_rx + accum_cnt) / accum_cnt) + 32) >>
442 scale_factor) +
443 (1 << scale_factor) * max_index + 16;
444
445 if (accum_ang >= (1 << 26))
446 accum_ang -= 1 << 27;
447
448 theta[i + 1] = ((accum_ang * (1 << scale_factor)) + accum_cnt) /
449 accum_cnt;
450
451 max_index++;
452 }
453
454 /*
455 * Find average theta of first 5 bin and all of those to same value.
456 * Curve is linear at that range.
457 */
458 for (i = 1; i < 6; i++)
459 theta_low_bin += theta[i];
460
461 theta_low_bin = theta_low_bin / 5;
462 for (i = 1; i < 6; i++)
463 theta[i] = theta_low_bin;
464
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;
469
470 x_est[0] = 0;
471 Y[0] = 0;
472 scale_factor = 8;
473
474 /* low signal gain */
475 if (x_est[6] == x_est[3])
476 return false;
477
478 G_fxp =
479 (((Y[6] - Y[3]) * 1 << scale_factor) +
480 (x_est[6] - x_est[3])) / (x_est[6] - x_est[3]);
481
2d3fca18
SB		 482 /* prevent division by zero */
483 if (G_fxp == 0)
484 return false;
485
717f6bed
FF		 486 Y_intercept =
487 (G_fxp * (x_est[0] - x_est[3]) +
488 (1 << scale_factor)) / (1 << scale_factor) + Y[3];
489
490 for (i = 0; i <= max_index; i++)
491 y_est[i] = Y[i] - Y_intercept;
492
493 for (i = 0; i <= 3; i++) {
494 y_est[i] = i * 32;
717f6bed
FF		 495 x_est[i] = ((y_est[i] * 1 << scale_factor) + G_fxp) / G_fxp;
496 }
497
2d3fca18
SB		 498 if (y_est[max_index] == 0)
499 return false;
500
717f6bed
FF		 501 x_est_fxp1_nonlin =
502 x_est[max_index] - ((1 << scale_factor) * y_est[max_index] +
503 G_fxp) / G_fxp;
504
505 order_x_by_y =
506 (x_est_fxp1_nonlin + y_est[max_index]) / y_est[max_index];
507
508 if (order_x_by_y == 0)
509 M = 10;
510 else if (order_x_by_y == 1)
511 M = 9;
512 else
513 M = 8;
514
515 I = (max_index > 15) ? 7 : max_index >> 1;
516 L = max_index - I;
517 scale_factor = 8;
518 sum_y_sqr = 0;
519 sum_y_quad = 0;
520 x_tilde_abs = 0;
521
522 for (i = 0; i <= L; i++) {
523 unsigned int y_sqr;
524 unsigned int y_quad;
525 unsigned int tmp_abs;
526
527 /* prevent division by zero */
528 if (y_est[i + I] == 0)
529 return false;
530
531 x_est_fxp1_nonlin =
532 x_est[i + I] - ((1 << scale_factor) * y_est[i + I] +
533 G_fxp) / G_fxp;
534
535 x_tilde[i] =
536 (x_est_fxp1_nonlin * (1 << M) + y_est[i + I]) / y_est[i +
537 I];
538 x_tilde[i] =
539 (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
540 x_tilde[i] =
541 (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I];
542 y_sqr =
543 (y_est[i + I] * y_est[i + I] +
544 (scale_factor * scale_factor)) / (scale_factor *
545 scale_factor);
546 tmp_abs = abs(x_tilde[i]);
547 if (tmp_abs > x_tilde_abs)
548 x_tilde_abs = tmp_abs;
549
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);
554 B2_tmp[i] = y_sqr;
555 }
556
557 B1_abs_max = 0;
558 B2_abs_max = 0;
559 for (i = 0; i <= L; i++) {
560 int abs_val;
561
562 B1_tmp[i] -= sum_y_sqr;
563 B2_tmp[i] = sum_y_quad - sum_y_sqr * B2_tmp[i];
564
565 abs_val = abs(B1_tmp[i]);
566 if (abs_val > B1_abs_max)
567 B1_abs_max = abs_val;
568
569 abs_val = abs(B2_tmp[i]);
570 if (abs_val > B2_abs_max)
571 B2_abs_max = abs_val;
572 }
573
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);
577
578 beta_raw = 0;
579 alpha_raw = 0;
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];
586 }
587
588 scale_B =
589 ((sum_y_quad / scale_factor) * (L + 1) -
590 (sum_y_sqr / scale_factor) * sum_y_sqr) * scale_factor;
591
592 Q_scale_B = find_proper_scale(find_expn(abs(scale_B)), 10);
593 scale_B = scale_B / (1 << Q_scale_B);
2d3fca18
SB		 594 if (scale_B == 0)
595 return false;
717f6bed
FF		 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;
608
609 for (i = 0; i < PAPRD_TABLE_SZ; i++) {
610 tmp = i * 32;
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;
622
623 if (i >= 2) {
624 tmp = PA_in[i] - PA_in[i - 1];
625 if (tmp < 0)
626 PA_in[i] =
627 PA_in[i - 1] + (PA_in[i - 1] -
628 PA_in[i - 2]);
629 }
630
631 PA_in[i] = (PA_in[i] < 1400) ? PA_in[i] : 1400;
632 }
633
634 beta_raw = 0;
635 alpha_raw = 0;
636
637 for (i = 0; i <= L; i++) {
638 int theta_tilde =
639 ((theta[i + I] << M) + y_est[i + I]) / y_est[i + I];
640 theta_tilde =
641 ((theta_tilde << M) + y_est[i + I]) / y_est[i + I];
642 theta_tilde =
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;
646 }
647
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);
652
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;
661
662 for (i = 0; i < PAPRD_TABLE_SZ; i++) {
663 int PA_angle;
664
665 /* pa_table[4] is calculated from PA_angle for i=5 */
666 if (i == 4)
667 continue;
668
669 tmp = i * 32;
670 if (beta > 0)
671 y5 = (((beta * tmp - 64) >> 6) -
672 (1 << order1_5x)) / (1 << order1_5x);
673 else
674 y5 = ((((beta * tmp - 64) >> 6) +
675 (1 << order1_5x)) / (1 << order1_5x));
676
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);
682
683 if (beta > 0)
684 y3 = (alpha * tmp -
685 (1 << order2_3x)) / (1 << order2_3x);
686 else
687 y3 = (alpha * tmp +
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);
692
693 if (i < 4) {
694 PA_angle = 0;
695 } else {
696 PA_angle = y5 + y3;
697 if (PA_angle < -150)
698 PA_angle = -150;
699 else if (PA_angle > 150)
700 PA_angle = 150;
701 }
702
703 pa_table[i] = ((PA_in[i] & 0x7ff) << 11) + (PA_angle & 0x7ff);
704 if (i == 5) {
705 PA_angle = (PA_angle + 2) >> 1;
706 pa_table[i - 1] = ((PA_in[i - 1] & 0x7ff) << 11) +
707 (PA_angle & 0x7ff);
708 }
709 }
710
711 *gain = G_fxp;
712 return true;
713}
714
715void ar9003_paprd_populate_single_table(struct ath_hw *ah,
20bd2a09
FF		 716 struct ath9k_hw_cal_data *caldata,
717 int chain)
717f6bed 718{
20bd2a09
FF		 719 u32 *paprd_table_val = caldata->pa_table[chain];
720 u32 small_signal_gain = caldata->small_signal_gain[chain];
1bf38661 721 u32 training_power = ah->paprd_training_power;
717f6bed
FF		 722 u32 reg = 0;
723 int i;
724
717f6bed
FF		 725 if (chain == 0)
726 reg = AR_PHY_PAPRD_MEM_TAB_B0;
727 else if (chain == 1)
728 reg = AR_PHY_PAPRD_MEM_TAB_B1;
729 else if (chain == 2)
730 reg = AR_PHY_PAPRD_MEM_TAB_B2;
731
732 for (i = 0; i < PAPRD_TABLE_SZ; i++) {
733 REG_WRITE(ah, reg, paprd_table_val[i]);
734 reg = reg + 4;
735 }
736
737 if (chain == 0)
738 reg = AR_PHY_PA_GAIN123_B0;
739 else if (chain == 1)
740 reg = AR_PHY_PA_GAIN123_B1;
741 else
742 reg = AR_PHY_PA_GAIN123_B2;
743
744 REG_RMW_FIELD(ah, reg, AR_PHY_PA_GAIN123_PA_GAIN1, small_signal_gain);
745
746 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B0,
747 AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
748 training_power);
749
11441fb8
VT		 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,
753 training_power);
717f6bed 754
11441fb8 755 if (ah->caps.tx_chainmask & BIT(2))
2577c6e8 756 /* val AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL correct? */
11441fb8
VT		 757 REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B2,
758 AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL,
759 training_power);
717f6bed
FF		 760}
761EXPORT_SYMBOL(ar9003_paprd_populate_single_table);
762
763int ar9003_paprd_setup_gain_table(struct ath_hw *ah, int chain)
764{
717f6bed 765 unsigned int i, desired_gain, gain_index;
1bf38661 766 unsigned int train_power = ah->paprd_training_power;
717f6bed
FF		 767
768 desired_gain = ar9003_get_desired_gain(ah, chain, train_power);
769
770 gain_index = 0;
05b60d4e 771 for (i = 0; i < PAPRD_GAIN_TABLE_ENTRIES; i++) {
717f6bed
FF		 772 if (ah->paprd_gain_table_index[i] >= desired_gain)
773 break;
774 gain_index++;
775 }
776
777 ar9003_tx_force_gain(ah, gain_index);
778
779 REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
780 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
781
782 return 0;
783}
784EXPORT_SYMBOL(ar9003_paprd_setup_gain_table);
785
20bd2a09
FF		 786int ar9003_paprd_create_curve(struct ath_hw *ah,
787 struct ath9k_hw_cal_data *caldata, int chain)
717f6bed 788{
20bd2a09
FF		 789 u16 *small_signal_gain = &caldata->small_signal_gain[chain];
790 u32 *pa_table = caldata->pa_table[chain];
717f6bed
FF		 791 u32 *data_L, *data_U;
792 int i, status = 0;
793 u32 *buf;
794 u32 reg;
795
20bd2a09 796 memset(caldata->pa_table[chain], 0, sizeof(caldata->pa_table[chain]));
717f6bed
FF		 797
798 buf = kmalloc(2 * 48 * sizeof(u32), GFP_ATOMIC);
799 if (!buf)
800 return -ENOMEM;
801
802 data_L = &buf[0];
803 data_U = &buf[48];
804
805 REG_CLR_BIT(ah, AR_PHY_CHAN_INFO_MEMORY,
806 AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
807
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));
811
812 REG_SET_BIT(ah, AR_PHY_CHAN_INFO_MEMORY,
813 AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ);
814
815 for (i = 0; i < 48; i++)
816 data_U[i] = REG_READ(ah, reg + (i << 2));
817
818 if (!create_pa_curve(data_L, data_U, pa_table, small_signal_gain))
819 status = -2;
820
821 REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1,
822 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
823
824 kfree(buf);
825
826 return status;
827}
828EXPORT_SYMBOL(ar9003_paprd_create_curve);
829
830int ar9003_paprd_init_table(struct ath_hw *ah)
831{
1bf38661
FF		 832 int ret;
833
834 ret = ar9003_paprd_setup_single_table(ah);
835 if (ret < 0)
836 return ret;
837
717f6bed
FF		 838 ar9003_paprd_get_gain_table(ah);
839 return 0;
840}
841EXPORT_SYMBOL(ar9003_paprd_init_table);
842
843bool ar9003_paprd_is_done(struct ath_hw *ah)
844{
0e44d48c
MSS		 845 int paprd_done, agc2_pwr;
846 paprd_done = REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1,
717f6bed 847 AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE);
0e44d48c
MSS		 848
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);
852
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);
856 /*
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
860 */
861 if (agc2_pwr <= PAPRD_IDEAL_AGC2_PWR_RANGE)
862 paprd_done = 0;
863 }
864
865 return !!paprd_done;
717f6bed
FF		 866}
867EXPORT_SYMBOL(ar9003_paprd_is_done);
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