diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/ar9003_paprd.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ar9003_paprd.c | 714 |
1 files changed, 714 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_paprd.c b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c new file mode 100644 index 000000000000..49e0c865ce5c --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/ar9003_paprd.c @@ -0,0 +1,714 @@ +/* + * Copyright (c) 2010 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "hw.h" +#include "ar9003_phy.h" + +void ar9003_paprd_enable(struct ath_hw *ah, bool val) +{ + REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B0, + AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B1, + AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL0_B2, + AR_PHY_PAPRD_CTRL0_PAPRD_ENABLE, !!val); +} +EXPORT_SYMBOL(ar9003_paprd_enable); + +static void ar9003_paprd_setup_single_table(struct ath_hw *ah) +{ + struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep; + struct ar9300_modal_eep_header *hdr; + const u32 ctrl0[3] = { + AR_PHY_PAPRD_CTRL0_B0, + AR_PHY_PAPRD_CTRL0_B1, + AR_PHY_PAPRD_CTRL0_B2 + }; + const u32 ctrl1[3] = { + AR_PHY_PAPRD_CTRL1_B0, + AR_PHY_PAPRD_CTRL1_B1, + AR_PHY_PAPRD_CTRL1_B2 + }; + u32 am_mask, ht40_mask; + int i; + + if (ah->curchan && IS_CHAN_5GHZ(ah->curchan)) + hdr = &eep->modalHeader5G; + else + hdr = &eep->modalHeader2G; + + am_mask = le32_to_cpu(hdr->papdRateMaskHt20); + ht40_mask = le32_to_cpu(hdr->papdRateMaskHt40); + + REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2AM, AR_PHY_PAPRD_AM2AM_MASK, am_mask); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_AM2PM, AR_PHY_PAPRD_AM2PM_MASK, am_mask); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_HT40, AR_PHY_PAPRD_HT40_MASK, ht40_mask); + + for (i = 0; i < 3; i++) { + REG_RMW_FIELD(ah, ctrl0[i], + AR_PHY_PAPRD_CTRL0_USE_SINGLE_TABLE_MASK, 1); + REG_RMW_FIELD(ah, ctrl1[i], + AR_PHY_PAPRD_CTRL1_ADAPTIVE_AM2PM_ENABLE, 1); + REG_RMW_FIELD(ah, ctrl1[i], + AR_PHY_PAPRD_CTRL1_ADAPTIVE_AM2AM_ENABLE, 1); + REG_RMW_FIELD(ah, ctrl1[i], + AR_PHY_PAPRD_CTRL1_ADAPTIVE_SCALING_ENA, 0); + REG_RMW_FIELD(ah, ctrl1[i], + AR_PHY_PAPRD_CTRL1_PA_GAIN_SCALE_FACT_MASK, 181); + REG_RMW_FIELD(ah, ctrl1[i], + AR_PHY_PAPRD_CTRL1_PAPRD_MAG_SCALE_FACT, 361); + REG_RMW_FIELD(ah, ctrl1[i], + AR_PHY_PAPRD_CTRL1_ADAPTIVE_SCALING_ENA, 0); + REG_RMW_FIELD(ah, ctrl0[i], + AR_PHY_PAPRD_CTRL0_PAPRD_MAG_THRSH, 3); + } + + ar9003_paprd_enable(ah, false); + + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1, + AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_LB_SKIP, 0x30); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1, + AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_LB_ENABLE, 1); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1, + AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_TX_GAIN_FORCE, 1); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1, + AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_RX_BB_GAIN_FORCE, 0); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1, + AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_IQCORR_ENABLE, 0); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1, + AR_PHY_PAPRD_TRAINER_CNTL1_CF_PAPRD_AGC2_SETTLING, 28); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL1, + AR_PHY_PAPRD_TRAINER_CNTL1_CF_CF_PAPRD_TRAIN_ENABLE, 1); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL2, + AR_PHY_PAPRD_TRAINER_CNTL2_CF_PAPRD_INIT_RX_BB_GAIN, 147); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3, + AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_FINE_CORR_LEN, 4); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3, + AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_COARSE_CORR_LEN, 4); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3, + AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_NUM_CORR_STAGES, 7); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3, + AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_MIN_LOOPBACK_DEL, 1); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3, + AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_QUICK_DROP, -6); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3, + AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_ADC_DESIRED_SIZE, + -15); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL3, + AR_PHY_PAPRD_TRAINER_CNTL3_CF_PAPRD_BBTXMIX_DISABLE, 1); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4, + AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_SAFETY_DELTA, 0); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4, + AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_MIN_CORR, 400); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_TRAINER_CNTL4, + AR_PHY_PAPRD_TRAINER_CNTL4_CF_PAPRD_NUM_TRAIN_SAMPLES, + 100); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_0_B0, + AR_PHY_PAPRD_PRE_POST_SCALING, 261376); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_1_B0, + AR_PHY_PAPRD_PRE_POST_SCALING, 248079); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_2_B0, + AR_PHY_PAPRD_PRE_POST_SCALING, 233759); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_3_B0, + AR_PHY_PAPRD_PRE_POST_SCALING, 220464); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_4_B0, + AR_PHY_PAPRD_PRE_POST_SCALING, 208194); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_5_B0, + AR_PHY_PAPRD_PRE_POST_SCALING, 196949); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_6_B0, + AR_PHY_PAPRD_PRE_POST_SCALING, 185706); + REG_RMW_FIELD(ah, AR_PHY_PAPRD_PRE_POST_SCALE_7_B0, + AR_PHY_PAPRD_PRE_POST_SCALING, 175487); +} + +static void ar9003_paprd_get_gain_table(struct ath_hw *ah) +{ + u32 *entry = ah->paprd_gain_table_entries; + u8 *index = ah->paprd_gain_table_index; + u32 reg = AR_PHY_TXGAIN_TABLE; + int i; + + memset(entry, 0, sizeof(ah->paprd_gain_table_entries)); + memset(index, 0, sizeof(ah->paprd_gain_table_index)); + + for (i = 0; i < 32; i++) { + entry[i] = REG_READ(ah, reg); + index[i] = (entry[i] >> 24) & 0xff; + reg += 4; + } +} + +static unsigned int ar9003_get_desired_gain(struct ath_hw *ah, int chain, + int target_power) +{ + int olpc_gain_delta = 0; + int alpha_therm, alpha_volt; + int therm_cal_value, volt_cal_value; + int therm_value, volt_value; + int thermal_gain_corr, voltage_gain_corr; + int desired_scale, desired_gain = 0; + u32 reg; + + REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1, + AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE); + desired_scale = REG_READ_FIELD(ah, AR_PHY_TPC_12, + AR_PHY_TPC_12_DESIRED_SCALE_HT40_5); + alpha_therm = REG_READ_FIELD(ah, AR_PHY_TPC_19, + AR_PHY_TPC_19_ALPHA_THERM); + alpha_volt = REG_READ_FIELD(ah, AR_PHY_TPC_19, + AR_PHY_TPC_19_ALPHA_VOLT); + therm_cal_value = REG_READ_FIELD(ah, AR_PHY_TPC_18, + AR_PHY_TPC_18_THERM_CAL_VALUE); + volt_cal_value = REG_READ_FIELD(ah, AR_PHY_TPC_18, + AR_PHY_TPC_18_VOLT_CAL_VALUE); + therm_value = REG_READ_FIELD(ah, AR_PHY_BB_THERM_ADC_4, + AR_PHY_BB_THERM_ADC_4_LATEST_THERM_VALUE); + volt_value = REG_READ_FIELD(ah, AR_PHY_BB_THERM_ADC_4, + AR_PHY_BB_THERM_ADC_4_LATEST_VOLT_VALUE); + + if (chain == 0) + reg = AR_PHY_TPC_11_B0; + else if (chain == 1) + reg = AR_PHY_TPC_11_B1; + else + reg = AR_PHY_TPC_11_B2; + + olpc_gain_delta = REG_READ_FIELD(ah, reg, + AR_PHY_TPC_11_OLPC_GAIN_DELTA); + + if (olpc_gain_delta >= 128) + olpc_gain_delta = olpc_gain_delta - 256; + + thermal_gain_corr = (alpha_therm * (therm_value - therm_cal_value) + + (256 / 2)) / 256; + voltage_gain_corr = (alpha_volt * (volt_value - volt_cal_value) + + (128 / 2)) / 128; + desired_gain = target_power - olpc_gain_delta - thermal_gain_corr - + voltage_gain_corr + desired_scale; + + return desired_gain; +} + +static void ar9003_tx_force_gain(struct ath_hw *ah, unsigned int gain_index) +{ + int selected_gain_entry, txbb1dbgain, txbb6dbgain, txmxrgain; + int padrvgnA, padrvgnB, padrvgnC, padrvgnD; + u32 *gain_table_entries = ah->paprd_gain_table_entries; + + selected_gain_entry = gain_table_entries[gain_index]; + txbb1dbgain = selected_gain_entry & 0x7; + txbb6dbgain = (selected_gain_entry >> 3) & 0x3; + txmxrgain = (selected_gain_entry >> 5) & 0xf; + padrvgnA = (selected_gain_entry >> 9) & 0xf; + padrvgnB = (selected_gain_entry >> 13) & 0xf; + padrvgnC = (selected_gain_entry >> 17) & 0xf; + padrvgnD = (selected_gain_entry >> 21) & 0x3; + + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCED_TXBB1DBGAIN, txbb1dbgain); + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCED_TXBB6DBGAIN, txbb6dbgain); + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCED_TXMXRGAIN, txmxrgain); + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNA, padrvgnA); + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNB, padrvgnB); + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGNC, padrvgnC); + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCED_PADRVGND, padrvgnD); + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCED_ENABLE_PAL, 0); + REG_RMW_FIELD(ah, AR_PHY_TX_FORCED_GAIN, + AR_PHY_TX_FORCED_GAIN_FORCE_TX_GAIN, 0); + REG_RMW_FIELD(ah, AR_PHY_TPC_1, AR_PHY_TPC_1_FORCED_DAC_GAIN, 0); + REG_RMW_FIELD(ah, AR_PHY_TPC_1, AR_PHY_TPC_1_FORCE_DAC_GAIN, 0); +} + +static inline int find_expn(int num) +{ + return fls(num) - 1; +} + +static inline int find_proper_scale(int expn, int N) +{ + return (expn > N) ? expn - 10 : 0; +} + +#define NUM_BIN 23 + +static bool create_pa_curve(u32 *data_L, u32 *data_U, u32 *pa_table, u16 *gain) +{ + unsigned int thresh_accum_cnt; + int x_est[NUM_BIN + 1], Y[NUM_BIN + 1], theta[NUM_BIN + 1]; + int PA_in[NUM_BIN + 1]; + int B1_tmp[NUM_BIN + 1], B2_tmp[NUM_BIN + 1]; + unsigned int B1_abs_max, B2_abs_max; + int max_index, scale_factor; + int y_est[NUM_BIN + 1]; + int x_est_fxp1_nonlin, x_tilde[NUM_BIN + 1]; + unsigned int x_tilde_abs; + int G_fxp, Y_intercept, order_x_by_y, M, I, L, sum_y_sqr, sum_y_quad; + int Q_x, Q_B1, Q_B2, beta_raw, alpha_raw, scale_B; + int Q_scale_B, Q_beta, Q_alpha, alpha, beta, order_1, order_2; + int order1_5x, order2_3x, order1_5x_rem, order2_3x_rem; + int y5, y3, tmp; + int theta_low_bin = 0; + int i; + + /* disregard any bin that contains <= 16 samples */ + thresh_accum_cnt = 16; + scale_factor = 5; + max_index = 0; + memset(theta, 0, sizeof(theta)); + memset(x_est, 0, sizeof(x_est)); + memset(Y, 0, sizeof(Y)); + memset(y_est, 0, sizeof(y_est)); + memset(x_tilde, 0, sizeof(x_tilde)); + + for (i = 0; i < NUM_BIN; i++) { + s32 accum_cnt, accum_tx, accum_rx, accum_ang; + + /* number of samples */ + accum_cnt = data_L[i] & 0xffff; + + if (accum_cnt <= thresh_accum_cnt) + continue; + + /* sum(tx amplitude) */ + accum_tx = ((data_L[i] >> 16) & 0xffff) | + ((data_U[i] & 0x7ff) << 16); + + /* sum(rx amplitude distance to lower bin edge) */ + accum_rx = ((data_U[i] >> 11) & 0x1f) | + ((data_L[i + 23] & 0xffff) << 5); + + /* sum(angles) */ + accum_ang = ((data_L[i + 23] >> 16) & 0xffff) | + ((data_U[i + 23] & 0x7ff) << 16); + + accum_tx <<= scale_factor; + accum_rx <<= scale_factor; + x_est[i + 1] = (((accum_tx + accum_cnt) / accum_cnt) + 32) >> + scale_factor; + + Y[i + 1] = ((((accum_rx + accum_cnt) / accum_cnt) + 32) >> + scale_factor) + + (1 << scale_factor) * max_index + 16; + + if (accum_ang >= (1 << 26)) + accum_ang -= 1 << 27; + + theta[i + 1] = ((accum_ang * (1 << scale_factor)) + accum_cnt) / + accum_cnt; + + max_index++; + } + + /* + * Find average theta of first 5 bin and all of those to same value. + * Curve is linear at that range. + */ + for (i = 1; i < 6; i++) + theta_low_bin += theta[i]; + + theta_low_bin = theta_low_bin / 5; + for (i = 1; i < 6; i++) + theta[i] = theta_low_bin; + + /* Set values at origin */ + theta[0] = theta_low_bin; + for (i = 0; i <= max_index; i++) + theta[i] -= theta_low_bin; + + x_est[0] = 0; + Y[0] = 0; + scale_factor = 8; + + /* low signal gain */ + if (x_est[6] == x_est[3]) + return false; + + G_fxp = + (((Y[6] - Y[3]) * 1 << scale_factor) + + (x_est[6] - x_est[3])) / (x_est[6] - x_est[3]); + + Y_intercept = + (G_fxp * (x_est[0] - x_est[3]) + + (1 << scale_factor)) / (1 << scale_factor) + Y[3]; + + for (i = 0; i <= max_index; i++) + y_est[i] = Y[i] - Y_intercept; + + for (i = 0; i <= 3; i++) { + y_est[i] = i * 32; + + /* prevent division by zero */ + if (G_fxp == 0) + return false; + + x_est[i] = ((y_est[i] * 1 << scale_factor) + G_fxp) / G_fxp; + } + + x_est_fxp1_nonlin = + x_est[max_index] - ((1 << scale_factor) * y_est[max_index] + + G_fxp) / G_fxp; + + order_x_by_y = + (x_est_fxp1_nonlin + y_est[max_index]) / y_est[max_index]; + + if (order_x_by_y == 0) + M = 10; + else if (order_x_by_y == 1) + M = 9; + else + M = 8; + + I = (max_index > 15) ? 7 : max_index >> 1; + L = max_index - I; + scale_factor = 8; + sum_y_sqr = 0; + sum_y_quad = 0; + x_tilde_abs = 0; + + for (i = 0; i <= L; i++) { + unsigned int y_sqr; + unsigned int y_quad; + unsigned int tmp_abs; + + /* prevent division by zero */ + if (y_est[i + I] == 0) + return false; + + x_est_fxp1_nonlin = + x_est[i + I] - ((1 << scale_factor) * y_est[i + I] + + G_fxp) / G_fxp; + + x_tilde[i] = + (x_est_fxp1_nonlin * (1 << M) + y_est[i + I]) / y_est[i + + I]; + x_tilde[i] = + (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I]; + x_tilde[i] = + (x_tilde[i] * (1 << M) + y_est[i + I]) / y_est[i + I]; + y_sqr = + (y_est[i + I] * y_est[i + I] + + (scale_factor * scale_factor)) / (scale_factor * + scale_factor); + tmp_abs = abs(x_tilde[i]); + if (tmp_abs > x_tilde_abs) + x_tilde_abs = tmp_abs; + + y_quad = y_sqr * y_sqr; + sum_y_sqr = sum_y_sqr + y_sqr; + sum_y_quad = sum_y_quad + y_quad; + B1_tmp[i] = y_sqr * (L + 1); + B2_tmp[i] = y_sqr; + } + + B1_abs_max = 0; + B2_abs_max = 0; + for (i = 0; i <= L; i++) { + int abs_val; + + B1_tmp[i] -= sum_y_sqr; + B2_tmp[i] = sum_y_quad - sum_y_sqr * B2_tmp[i]; + + abs_val = abs(B1_tmp[i]); + if (abs_val > B1_abs_max) + B1_abs_max = abs_val; + + abs_val = abs(B2_tmp[i]); + if (abs_val > B2_abs_max) + B2_abs_max = abs_val; + } + + Q_x = find_proper_scale(find_expn(x_tilde_abs), 10); + Q_B1 = find_proper_scale(find_expn(B1_abs_max), 10); + Q_B2 = find_proper_scale(find_expn(B2_abs_max), 10); + + beta_raw = 0; + alpha_raw = 0; + for (i = 0; i <= L; i++) { + x_tilde[i] = x_tilde[i] / (1 << Q_x); + B1_tmp[i] = B1_tmp[i] / (1 << Q_B1); + B2_tmp[i] = B2_tmp[i] / (1 << Q_B2); + beta_raw = beta_raw + B1_tmp[i] * x_tilde[i]; + alpha_raw = alpha_raw + B2_tmp[i] * x_tilde[i]; + } + + scale_B = + ((sum_y_quad / scale_factor) * (L + 1) - + (sum_y_sqr / scale_factor) * sum_y_sqr) * scale_factor; + + Q_scale_B = find_proper_scale(find_expn(abs(scale_B)), 10); + scale_B = scale_B / (1 << Q_scale_B); + Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10); + Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10); + beta_raw = beta_raw / (1 << Q_beta); + alpha_raw = alpha_raw / (1 << Q_alpha); + alpha = (alpha_raw << 10) / scale_B; + beta = (beta_raw << 10) / scale_B; + order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B; + order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B; + order1_5x = order_1 / 5; + order2_3x = order_2 / 3; + order1_5x_rem = order_1 - 5 * order1_5x; + order2_3x_rem = order_2 - 3 * order2_3x; + + for (i = 0; i < PAPRD_TABLE_SZ; i++) { + tmp = i * 32; + y5 = ((beta * tmp) >> 6) >> order1_5x; + y5 = (y5 * tmp) >> order1_5x; + y5 = (y5 * tmp) >> order1_5x; + y5 = (y5 * tmp) >> order1_5x; + y5 = (y5 * tmp) >> order1_5x; + y5 = y5 >> order1_5x_rem; + y3 = (alpha * tmp) >> order2_3x; + y3 = (y3 * tmp) >> order2_3x; + y3 = (y3 * tmp) >> order2_3x; + y3 = y3 >> order2_3x_rem; + PA_in[i] = y5 + y3 + (256 * tmp) / G_fxp; + + if (i >= 2) { + tmp = PA_in[i] - PA_in[i - 1]; + if (tmp < 0) + PA_in[i] = + PA_in[i - 1] + (PA_in[i - 1] - + PA_in[i - 2]); + } + + PA_in[i] = (PA_in[i] < 1400) ? PA_in[i] : 1400; + } + + beta_raw = 0; + alpha_raw = 0; + + for (i = 0; i <= L; i++) { + int theta_tilde = + ((theta[i + I] << M) + y_est[i + I]) / y_est[i + I]; + theta_tilde = + ((theta_tilde << M) + y_est[i + I]) / y_est[i + I]; + theta_tilde = + ((theta_tilde << M) + y_est[i + I]) / y_est[i + I]; + beta_raw = beta_raw + B1_tmp[i] * theta_tilde; + alpha_raw = alpha_raw + B2_tmp[i] * theta_tilde; + } + + Q_beta = find_proper_scale(find_expn(abs(beta_raw)), 10); + Q_alpha = find_proper_scale(find_expn(abs(alpha_raw)), 10); + beta_raw = beta_raw / (1 << Q_beta); + alpha_raw = alpha_raw / (1 << Q_alpha); + + alpha = (alpha_raw << 10) / scale_B; + beta = (beta_raw << 10) / scale_B; + order_1 = 3 * M - Q_x - Q_B1 - Q_beta + 10 + Q_scale_B + 5; + order_2 = 3 * M - Q_x - Q_B2 - Q_alpha + 10 + Q_scale_B + 5; + order1_5x = order_1 / 5; + order2_3x = order_2 / 3; + order1_5x_rem = order_1 - 5 * order1_5x; + order2_3x_rem = order_2 - 3 * order2_3x; + + for (i = 0; i < PAPRD_TABLE_SZ; i++) { + int PA_angle; + + /* pa_table[4] is calculated from PA_angle for i=5 */ + if (i == 4) + continue; + + tmp = i * 32; + if (beta > 0) + y5 = (((beta * tmp - 64) >> 6) - + (1 << order1_5x)) / (1 << order1_5x); + else + y5 = ((((beta * tmp - 64) >> 6) + + (1 << order1_5x)) / (1 << order1_5x)); + + y5 = (y5 * tmp) / (1 << order1_5x); + y5 = (y5 * tmp) / (1 << order1_5x); + y5 = (y5 * tmp) / (1 << order1_5x); + y5 = (y5 * tmp) / (1 << order1_5x); + y5 = y5 / (1 << order1_5x_rem); + + if (beta > 0) + y3 = (alpha * tmp - + (1 << order2_3x)) / (1 << order2_3x); + else + y3 = (alpha * tmp + + (1 << order2_3x)) / (1 << order2_3x); + y3 = (y3 * tmp) / (1 << order2_3x); + y3 = (y3 * tmp) / (1 << order2_3x); + y3 = y3 / (1 << order2_3x_rem); + + if (i < 4) { + PA_angle = 0; + } else { + PA_angle = y5 + y3; + if (PA_angle < -150) + PA_angle = -150; + else if (PA_angle > 150) + PA_angle = 150; + } + + pa_table[i] = ((PA_in[i] & 0x7ff) << 11) + (PA_angle & 0x7ff); + if (i == 5) { + PA_angle = (PA_angle + 2) >> 1; + pa_table[i - 1] = ((PA_in[i - 1] & 0x7ff) << 11) + + (PA_angle & 0x7ff); + } + } + + *gain = G_fxp; + return true; +} + +void ar9003_paprd_populate_single_table(struct ath_hw *ah, + struct ath9k_channel *chan, int chain) +{ + u32 *paprd_table_val = chan->pa_table[chain]; + u32 small_signal_gain = chan->small_signal_gain[chain]; + u32 training_power; + u32 reg = 0; + int i; + + training_power = + REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5, + AR_PHY_POWERTX_RATE5_POWERTXHT20_0); + training_power -= 4; + + if (chain == 0) + reg = AR_PHY_PAPRD_MEM_TAB_B0; + else if (chain == 1) + reg = AR_PHY_PAPRD_MEM_TAB_B1; + else if (chain == 2) + reg = AR_PHY_PAPRD_MEM_TAB_B2; + + for (i = 0; i < PAPRD_TABLE_SZ; i++) { + REG_WRITE(ah, reg, paprd_table_val[i]); + reg = reg + 4; + } + + if (chain == 0) + reg = AR_PHY_PA_GAIN123_B0; + else if (chain == 1) + reg = AR_PHY_PA_GAIN123_B1; + else + reg = AR_PHY_PA_GAIN123_B2; + + REG_RMW_FIELD(ah, reg, AR_PHY_PA_GAIN123_PA_GAIN1, small_signal_gain); + + REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B0, + AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL, + training_power); + + REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B1, + AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL, + training_power); + + REG_RMW_FIELD(ah, AR_PHY_PAPRD_CTRL1_B2, + AR_PHY_PAPRD_CTRL1_PAPRD_POWER_AT_AM2AM_CAL, + training_power); +} +EXPORT_SYMBOL(ar9003_paprd_populate_single_table); + +int ar9003_paprd_setup_gain_table(struct ath_hw *ah, int chain) +{ + + unsigned int i, desired_gain, gain_index; + unsigned int train_power; + + train_power = REG_READ_FIELD(ah, AR_PHY_POWERTX_RATE5, + AR_PHY_POWERTX_RATE5_POWERTXHT20_0); + + train_power = train_power - 4; + + desired_gain = ar9003_get_desired_gain(ah, chain, train_power); + + gain_index = 0; + for (i = 0; i < 32; i++) { + if (ah->paprd_gain_table_index[i] >= desired_gain) + break; + gain_index++; + } + + ar9003_tx_force_gain(ah, gain_index); + + REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1, + AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE); + + return 0; +} +EXPORT_SYMBOL(ar9003_paprd_setup_gain_table); + +int ar9003_paprd_create_curve(struct ath_hw *ah, struct ath9k_channel *chan, + int chain) +{ + u16 *small_signal_gain = &chan->small_signal_gain[chain]; + u32 *pa_table = chan->pa_table[chain]; + u32 *data_L, *data_U; + int i, status = 0; + u32 *buf; + u32 reg; + + memset(chan->pa_table[chain], 0, sizeof(chan->pa_table[chain])); + + buf = kmalloc(2 * 48 * sizeof(u32), GFP_ATOMIC); + if (!buf) + return -ENOMEM; + + data_L = &buf[0]; + data_U = &buf[48]; + + REG_CLR_BIT(ah, AR_PHY_CHAN_INFO_MEMORY, + AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ); + + reg = AR_PHY_CHAN_INFO_TAB_0; + for (i = 0; i < 48; i++) + data_L[i] = REG_READ(ah, reg + (i << 2)); + + REG_SET_BIT(ah, AR_PHY_CHAN_INFO_MEMORY, + AR_PHY_CHAN_INFO_MEMORY_CHANINFOMEM_S2_READ); + + for (i = 0; i < 48; i++) + data_U[i] = REG_READ(ah, reg + (i << 2)); + + if (!create_pa_curve(data_L, data_U, pa_table, small_signal_gain)) + status = -2; + + REG_CLR_BIT(ah, AR_PHY_PAPRD_TRAINER_STAT1, + AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE); + + kfree(buf); + + return status; +} +EXPORT_SYMBOL(ar9003_paprd_create_curve); + +int ar9003_paprd_init_table(struct ath_hw *ah) +{ + ar9003_paprd_setup_single_table(ah); + ar9003_paprd_get_gain_table(ah); + return 0; +} +EXPORT_SYMBOL(ar9003_paprd_init_table); + +bool ar9003_paprd_is_done(struct ath_hw *ah) +{ + return !!REG_READ_FIELD(ah, AR_PHY_PAPRD_TRAINER_STAT1, + AR_PHY_PAPRD_TRAINER_STAT1_PAPRD_TRAIN_DONE); +} +EXPORT_SYMBOL(ar9003_paprd_is_done); |