drivers/net/wireless/ath9k/phy.c

   1 /*
   2  * Copyright (c) 2008 Atheros Communications Inc.
   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
  17 #include "ath9k.h"
  18
  19 void
  20 ath9k_hw_write_regs(struct ath_hw *ah, u32 modesIndex, u32 freqIndex,
  21                     int regWrites)
  22 {
  23         REG_WRITE_ARRAY(&ah->iniBB_RfGain, freqIndex, regWrites);
  24 }
  25
  26 bool
  27 ath9k_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
  28 {
  29         u32 channelSel = 0;
  30         u32 bModeSynth = 0;
  31         u32 aModeRefSel = 0;
  32         u32 reg32 = 0;
  33         u16 freq;
  34         struct chan_centers centers;
  35
  36         ath9k_hw_get_channel_centers(ah, chan, &centers);
  37         freq = centers.synth_center;
  38
  39         if (freq < 4800) {
  40                 u32 txctl;
  41
  42                 if (((freq - 2192) % 5) == 0) {
  43                         channelSel = ((freq - 672) * 2 - 3040) / 10;
  44                         bModeSynth = 0;
  45                 } else if (((freq - 2224) % 5) == 0) {
  46                         channelSel = ((freq - 704) * 2 - 3040) / 10;
  47                         bModeSynth = 1;
  48                 } else {
  49                         DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
  50                                 "Invalid channel %u MHz\n", freq);
  51                         return false;
  52                 }
  53
  54                 channelSel = (channelSel << 2) & 0xff;
  55                 channelSel = ath9k_hw_reverse_bits(channelSel, 8);
  56
  57                 txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
  58                 if (freq == 2484) {
  59
  60                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
  61                                   txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
  62                 } else {
  63                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
  64                                   txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
  65                 }
  66
  67         } else if ((freq % 20) == 0 && freq >= 5120) {
  68                 channelSel =
  69                     ath9k_hw_reverse_bits(((freq - 4800) / 20 << 2), 8);
  70                 aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  71         } else if ((freq % 10) == 0) {
  72                 channelSel =
  73                     ath9k_hw_reverse_bits(((freq - 4800) / 10 << 1), 8);
  74                 if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah))
  75                         aModeRefSel = ath9k_hw_reverse_bits(2, 2);
  76                 else
  77                         aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  78         } else if ((freq % 5) == 0) {
  79                 channelSel = ath9k_hw_reverse_bits((freq - 4800) / 5, 8);
  80                 aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  81         } else {
  82                 DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
  83                         "Invalid channel %u MHz\n", freq);
  84                 return false;
  85         }
  86
  87         reg32 =
  88             (channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) |
  89             (1 << 5) | 0x1;
  90
  91         REG_WRITE(ah, AR_PHY(0x37), reg32);
  92
  93         ah->curchan = chan;
  94         ah->curchan_rad_index = -1;
  95
  96         return true;
  97 }
  98
  99 bool
 100 ath9k_hw_ar9280_set_channel(struct ath_hw *ah,
 101                             struct ath9k_channel *chan)
 102 {
 103         u16 bMode, fracMode, aModeRefSel = 0;
 104         u32 freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
 105         struct chan_centers centers;
 106         u32 refDivA = 24;
 107
 108         ath9k_hw_get_channel_centers(ah, chan, &centers);
 109         freq = centers.synth_center;
 110
 111         reg32 = REG_READ(ah, AR_PHY_SYNTH_CONTROL);
 112         reg32 &= 0xc0000000;
 113
 114         if (freq < 4800) {
 115                 u32 txctl;
 116
 117                 bMode = 1;
 118                 fracMode = 1;
 119                 aModeRefSel = 0;
 120                 channelSel = (freq * 0x10000) / 15;
 121
 122                 txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
 123                 if (freq == 2484) {
 124
 125                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 126                                   txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
 127                 } else {
 128                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 129                                   txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
 130                 }
 131         } else {
 132                 bMode = 0;
 133                 fracMode = 0;
 134
 135                 switch(ah->eep_ops->get_eeprom(ah, EEP_FRAC_N_5G)) {
 136                 case 0:
 137                         if ((freq % 20) == 0) {
 138                                 aModeRefSel = 3;
 139                         } else if ((freq % 10) == 0) {
 140                                 aModeRefSel = 2;
 141                         }
 142                         if (aModeRefSel)
 143                                 break;
 144                 case 1:
 145                 default:
 146                         aModeRefSel = 0;
 147                         fracMode = 1;
 148                         refDivA = 1;
 149                         channelSel = (freq * 0x8000) / 15;
 150
 151                         REG_RMW_FIELD(ah, AR_AN_SYNTH9,
 152                                       AR_AN_SYNTH9_REFDIVA, refDivA);
 153
 154                 }
 155
 156                 if (!fracMode) {
 157                         ndiv = (freq * (refDivA >> aModeRefSel)) / 60;
 158                         channelSel = ndiv & 0x1ff;
 159                         channelFrac = (ndiv & 0xfffffe00) * 2;
 160                         channelSel = (channelSel << 17) | channelFrac;
 161                 }
 162         }
 163
 164         reg32 = reg32 |
 165             (bMode << 29) |
 166             (fracMode << 28) | (aModeRefSel << 26) | (channelSel);
 167
 168         REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
 169
 170         ah->curchan = chan;
 171         ah->curchan_rad_index = -1;
 172
 173         return true;
 174 }
 175
 176 static void
 177 ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
 178                            u32 numBits, u32 firstBit,
 179                            u32 column)
 180 {
 181         u32 tmp32, mask, arrayEntry, lastBit;
 182         int32_t bitPosition, bitsLeft;
 183
 184         tmp32 = ath9k_hw_reverse_bits(reg32, numBits);
 185         arrayEntry = (firstBit - 1) / 8;
 186         bitPosition = (firstBit - 1) % 8;
 187         bitsLeft = numBits;
 188         while (bitsLeft > 0) {
 189                 lastBit = (bitPosition + bitsLeft > 8) ?
 190                     8 : bitPosition + bitsLeft;
 191                 mask = (((1 << lastBit) - 1) ^ ((1 << bitPosition) - 1)) <<
 192                     (column * 8);
 193                 rfBuf[arrayEntry] &= ~mask;
 194                 rfBuf[arrayEntry] |= ((tmp32 << bitPosition) <<
 195                                       (column * 8)) & mask;
 196                 bitsLeft -= 8 - bitPosition;
 197                 tmp32 = tmp32 >> (8 - bitPosition);
 198                 bitPosition = 0;
 199                 arrayEntry++;
 200         }
 201 }
 202
 203 bool
 204 ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
 205                      u16 modesIndex)
 206 {
 207         u32 eepMinorRev;
 208         u32 ob5GHz = 0, db5GHz = 0;
 209         u32 ob2GHz = 0, db2GHz = 0;
 210         int regWrites = 0;
 211
 212         if (AR_SREV_9280_10_OR_LATER(ah))
 213                 return true;
 214
 215         eepMinorRev = ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV);
 216
 217         RF_BANK_SETUP(ah->analogBank0Data, &ah->iniBank0, 1);
 218
 219         RF_BANK_SETUP(ah->analogBank1Data, &ah->iniBank1, 1);
 220
 221         RF_BANK_SETUP(ah->analogBank2Data, &ah->iniBank2, 1);
 222
 223         RF_BANK_SETUP(ah->analogBank3Data, &ah->iniBank3,
 224                       modesIndex);
 225         {
 226                 int i;
 227                 for (i = 0; i < ah->iniBank6TPC.ia_rows; i++) {
 228                         ah->analogBank6Data[i] =
 229                             INI_RA(&ah->iniBank6TPC, i, modesIndex);
 230                 }
 231         }
 232
 233         if (eepMinorRev >= 2) {
 234                 if (IS_CHAN_2GHZ(chan)) {
 235                         ob2GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_2);
 236                         db2GHz = ah->eep_ops->get_eeprom(ah, EEP_DB_2);
 237                         ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 238                                                    ob2GHz, 3, 197, 0);
 239                         ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 240                                                    db2GHz, 3, 194, 0);
 241                 } else {
 242                         ob5GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_5);
 243                         db5GHz = ah->eep_ops->get_eeprom(ah, EEP_DB_5);
 244                         ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 245                                                    ob5GHz, 3, 203, 0);
 246                         ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 247                                                    db5GHz, 3, 200, 0);
 248                 }
 249         }
 250
 251         RF_BANK_SETUP(ah->analogBank7Data, &ah->iniBank7, 1);
 252
 253         REG_WRITE_RF_ARRAY(&ah->iniBank0, ah->analogBank0Data,
 254                            regWrites);
 255         REG_WRITE_RF_ARRAY(&ah->iniBank1, ah->analogBank1Data,
 256                            regWrites);
 257         REG_WRITE_RF_ARRAY(&ah->iniBank2, ah->analogBank2Data,
 258                            regWrites);
 259         REG_WRITE_RF_ARRAY(&ah->iniBank3, ah->analogBank3Data,
 260                            regWrites);
 261         REG_WRITE_RF_ARRAY(&ah->iniBank6TPC, ah->analogBank6Data,
 262                            regWrites);
 263         REG_WRITE_RF_ARRAY(&ah->iniBank7, ah->analogBank7Data,
 264                            regWrites);
 265
 266         return true;
 267 }
 268
 269 void
 270 ath9k_hw_rfdetach(struct ath_hw *ah)
 271 {
 272         if (ah->analogBank0Data != NULL) {
 273                 kfree(ah->analogBank0Data);
 274                 ah->analogBank0Data = NULL;
 275         }
 276         if (ah->analogBank1Data != NULL) {
 277                 kfree(ah->analogBank1Data);
 278                 ah->analogBank1Data = NULL;
 279         }
 280         if (ah->analogBank2Data != NULL) {
 281                 kfree(ah->analogBank2Data);
 282                 ah->analogBank2Data = NULL;
 283         }
 284         if (ah->analogBank3Data != NULL) {
 285                 kfree(ah->analogBank3Data);
 286                 ah->analogBank3Data = NULL;
 287         }
 288         if (ah->analogBank6Data != NULL) {
 289                 kfree(ah->analogBank6Data);
 290                 ah->analogBank6Data = NULL;
 291         }
 292         if (ah->analogBank6TPCData != NULL) {
 293                 kfree(ah->analogBank6TPCData);
 294                 ah->analogBank6TPCData = NULL;
 295         }
 296         if (ah->analogBank7Data != NULL) {
 297                 kfree(ah->analogBank7Data);
 298                 ah->analogBank7Data = NULL;
 299         }
 300         if (ah->addac5416_21 != NULL) {
 301                 kfree(ah->addac5416_21);
 302                 ah->addac5416_21 = NULL;
 303         }
 304         if (ah->bank6Temp != NULL) {
 305                 kfree(ah->bank6Temp);
 306                 ah->bank6Temp = NULL;
 307         }
 308 }
 309
 310 bool ath9k_hw_init_rf(struct ath_hw *ah, int *status)
 311 {
 312         if (!AR_SREV_9280_10_OR_LATER(ah)) {
 313                 ah->analogBank0Data =
 314                     kzalloc((sizeof(u32) *
 315                              ah->iniBank0.ia_rows), GFP_KERNEL);
 316                 ah->analogBank1Data =
 317                     kzalloc((sizeof(u32) *
 318                              ah->iniBank1.ia_rows), GFP_KERNEL);
 319                 ah->analogBank2Data =
 320                     kzalloc((sizeof(u32) *
 321                              ah->iniBank2.ia_rows), GFP_KERNEL);
 322                 ah->analogBank3Data =
 323                     kzalloc((sizeof(u32) *
 324                              ah->iniBank3.ia_rows), GFP_KERNEL);
 325                 ah->analogBank6Data =
 326                     kzalloc((sizeof(u32) *
 327                              ah->iniBank6.ia_rows), GFP_KERNEL);
 328                 ah->analogBank6TPCData =
 329                     kzalloc((sizeof(u32) *
 330                              ah->iniBank6TPC.ia_rows), GFP_KERNEL);
 331                 ah->analogBank7Data =
 332                     kzalloc((sizeof(u32) *
 333                              ah->iniBank7.ia_rows), GFP_KERNEL);
 334
 335                 if (ah->analogBank0Data == NULL
 336                     || ah->analogBank1Data == NULL
 337                     || ah->analogBank2Data == NULL
 338                     || ah->analogBank3Data == NULL
 339                     || ah->analogBank6Data == NULL
 340                     || ah->analogBank6TPCData == NULL
 341                     || ah->analogBank7Data == NULL) {
 342                         DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 343                                 "Cannot allocate RF banks\n");
 344                         *status = -ENOMEM;
 345                         return false;
 346                 }
 347
 348                 ah->addac5416_21 =
 349                     kzalloc((sizeof(u32) *
 350                              ah->iniAddac.ia_rows *
 351                              ah->iniAddac.ia_columns), GFP_KERNEL);
 352                 if (ah->addac5416_21 == NULL) {
 353                         DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 354                                 "Cannot allocate addac5416_21\n");
 355                         *status = -ENOMEM;
 356                         return false;
 357                 }
 358
 359                 ah->bank6Temp =
 360                     kzalloc((sizeof(u32) *
 361                              ah->iniBank6.ia_rows), GFP_KERNEL);
 362                 if (ah->bank6Temp == NULL) {
 363                         DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 364                                 "Cannot allocate bank6Temp\n");
 365                         *status = -ENOMEM;
 366                         return false;
 367                 }
 368         }
 369
 370         return true;
 371 }
 372
 373 void
 374 ath9k_hw_decrease_chain_power(struct ath_hw *ah, struct ath9k_channel *chan)
 375 {
 376         int i, regWrites = 0;
 377         u32 bank6SelMask;
 378         u32 *bank6Temp = ah->bank6Temp;
 379
 380         switch (ah->diversity_control) {
 381         case ATH9K_ANT_FIXED_A:
 382                 bank6SelMask =
 383                     (ah->
 384                      antenna_switch_swap & ANTSWAP_AB) ? REDUCE_CHAIN_0 :
 385                     REDUCE_CHAIN_1;
 386                 break;
 387         case ATH9K_ANT_FIXED_B:
 388                 bank6SelMask =
 389                     (ah->
 390                      antenna_switch_swap & ANTSWAP_AB) ? REDUCE_CHAIN_1 :
 391                     REDUCE_CHAIN_0;
 392                 break;
 393         case ATH9K_ANT_VARIABLE:
 394                 return;
 395                 break;
 396         default:
 397                 return;
 398                 break;
 399         }
 400
 401         for (i = 0; i < ah->iniBank6.ia_rows; i++)
 402                 bank6Temp[i] = ah->analogBank6Data[i];
 403
 404         REG_WRITE(ah, AR_PHY_BASE + 0xD8, bank6SelMask);
 405
 406         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 189, 0);
 407         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 190, 0);
 408         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 191, 0);
 409         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 192, 0);
 410         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 193, 0);
 411         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 222, 0);
 412         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 245, 0);
 413         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 246, 0);
 414         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 247, 0);
 415
 416         REG_WRITE_RF_ARRAY(&ah->iniBank6, bank6Temp, regWrites);
 417
 418         REG_WRITE(ah, AR_PHY_BASE + 0xD8, 0x00000053);
 419 #ifdef ALTER_SWITCH
 420         REG_WRITE(ah, PHY_SWITCH_CHAIN_0,
 421                   (REG_READ(ah, PHY_SWITCH_CHAIN_0) & ~0x38)
 422                   | ((REG_READ(ah, PHY_SWITCH_CHAIN_0) >> 3) & 0x38));
 423 #endif
 424 }