drivers/net/wireless/ath/ath9k/phy.c

   1 /*
   2  * Copyright (c) 2008-2009 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 "hw.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         struct ath_common *common = ath9k_hw_common(ah);
  30         u32 channelSel = 0;
  31         u32 bModeSynth = 0;
  32         u32 aModeRefSel = 0;
  33         u32 reg32 = 0;
  34         u16 freq;
  35         struct chan_centers centers;
  36
  37         ath9k_hw_get_channel_centers(ah, chan, &centers);
  38         freq = centers.synth_center;
  39
  40         if (freq < 4800) {
  41                 u32 txctl;
  42
  43                 if (((freq - 2192) % 5) == 0) {
  44                         channelSel = ((freq - 672) * 2 - 3040) / 10;
  45                         bModeSynth = 0;
  46                 } else if (((freq - 2224) % 5) == 0) {
  47                         channelSel = ((freq - 704) * 2 - 3040) / 10;
  48                         bModeSynth = 1;
  49                 } else {
  50                         ath_print(common, ATH_DBG_FATAL,
  51                                   "Invalid channel %u MHz\n", freq);
  52                         return false;
  53                 }
  54
  55                 channelSel = (channelSel << 2) & 0xff;
  56                 channelSel = ath9k_hw_reverse_bits(channelSel, 8);
  57
  58                 txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
  59                 if (freq == 2484) {
  60
  61                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
  62                                   txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
  63                 } else {
  64                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
  65                                   txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
  66                 }
  67
  68         } else if ((freq % 20) == 0 && freq >= 5120) {
  69                 channelSel =
  70                     ath9k_hw_reverse_bits(((freq - 4800) / 20 << 2), 8);
  71                 aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  72         } else if ((freq % 10) == 0) {
  73                 channelSel =
  74                     ath9k_hw_reverse_bits(((freq - 4800) / 10 << 1), 8);
  75                 if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah))
  76                         aModeRefSel = ath9k_hw_reverse_bits(2, 2);
  77                 else
  78                         aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  79         } else if ((freq % 5) == 0) {
  80                 channelSel = ath9k_hw_reverse_bits((freq - 4800) / 5, 8);
  81                 aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  82         } else {
  83                 ath_print(common, ATH_DBG_FATAL,
  84                           "Invalid channel %u MHz\n", freq);
  85                 return false;
  86         }
  87
  88         reg32 =
  89             (channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) |
  90             (1 << 5) | 0x1;
  91
  92         REG_WRITE(ah, AR_PHY(0x37), reg32);
  93
  94         ah->curchan = chan;
  95         ah->curchan_rad_index = -1;
  96
  97         return true;
  98 }
  99
 100 void 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                 int regWrites = 0;
 117
 118                 bMode = 1;
 119                 fracMode = 1;
 120                 aModeRefSel = 0;
 121                 channelSel = (freq * 0x10000) / 15;
 122
 123                 if (AR_SREV_9287_11_OR_LATER(ah)) {
 124                         if (freq == 2484) {
 125                                 REG_WRITE_ARRAY(&ah->iniCckfirJapan2484,
 126                                                 1, regWrites);
 127                         } else {
 128                                 REG_WRITE_ARRAY(&ah->iniCckfirNormal,
 129                                                 1, regWrites);
 130                         }
 131                 } else {
 132                         txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
 133                         if (freq == 2484) {
 134                                 /* Enable channel spreading for channel 14 */
 135                                 REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 136                                           txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
 137                         } else {
 138                                 REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 139                                           txctl &~ AR_PHY_CCK_TX_CTRL_JAPAN);
 140                         }
 141                 }
 142         } else {
 143                 bMode = 0;
 144                 fracMode = 0;
 145
 146                 switch(ah->eep_ops->get_eeprom(ah, EEP_FRAC_N_5G)) {
 147                 case 0:
 148                         if ((freq % 20) == 0) {
 149                                 aModeRefSel = 3;
 150                         } else if ((freq % 10) == 0) {
 151                                 aModeRefSel = 2;
 152                         }
 153                         if (aModeRefSel)
 154                                 break;
 155                 case 1:
 156                 default:
 157                         aModeRefSel = 0;
 158                         fracMode = 1;
 159                         refDivA = 1;
 160                         channelSel = (freq * 0x8000) / 15;
 161
 162                         REG_RMW_FIELD(ah, AR_AN_SYNTH9,
 163                                       AR_AN_SYNTH9_REFDIVA, refDivA);
 164
 165                 }
 166
 167                 if (!fracMode) {
 168                         ndiv = (freq * (refDivA >> aModeRefSel)) / 60;
 169                         channelSel = ndiv & 0x1ff;
 170                         channelFrac = (ndiv & 0xfffffe00) * 2;
 171                         channelSel = (channelSel << 17) | channelFrac;
 172                 }
 173         }
 174
 175         reg32 = reg32 |
 176             (bMode << 29) |
 177             (fracMode << 28) | (aModeRefSel << 26) | (channelSel);
 178
 179         REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
 180
 181         ah->curchan = chan;
 182         ah->curchan_rad_index = -1;
 183 }
 184
 185 static void
 186 ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
 187                            u32 numBits, u32 firstBit,
 188                            u32 column)
 189 {
 190         u32 tmp32, mask, arrayEntry, lastBit;
 191         int32_t bitPosition, bitsLeft;
 192
 193         tmp32 = ath9k_hw_reverse_bits(reg32, numBits);
 194         arrayEntry = (firstBit - 1) / 8;
 195         bitPosition = (firstBit - 1) % 8;
 196         bitsLeft = numBits;
 197         while (bitsLeft > 0) {
 198                 lastBit = (bitPosition + bitsLeft > 8) ?
 199                     8 : bitPosition + bitsLeft;
 200                 mask = (((1 << lastBit) - 1) ^ ((1 << bitPosition) - 1)) <<
 201                     (column * 8);
 202                 rfBuf[arrayEntry] &= ~mask;
 203                 rfBuf[arrayEntry] |= ((tmp32 << bitPosition) <<
 204                                       (column * 8)) & mask;
 205                 bitsLeft -= 8 - bitPosition;
 206                 tmp32 = tmp32 >> (8 - bitPosition);
 207                 bitPosition = 0;
 208                 arrayEntry++;
 209         }
 210 }
 211
 212 bool
 213 ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
 214                      u16 modesIndex)
 215 {
 216         u32 eepMinorRev;
 217         u32 ob5GHz = 0, db5GHz = 0;
 218         u32 ob2GHz = 0, db2GHz = 0;
 219         int regWrites = 0;
 220
 221         if (AR_SREV_9280_10_OR_LATER(ah))
 222                 return true;
 223
 224         eepMinorRev = ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV);
 225
 226         RF_BANK_SETUP(ah->analogBank0Data, &ah->iniBank0, 1);
 227
 228         RF_BANK_SETUP(ah->analogBank1Data, &ah->iniBank1, 1);
 229
 230         RF_BANK_SETUP(ah->analogBank2Data, &ah->iniBank2, 1);
 231
 232         RF_BANK_SETUP(ah->analogBank3Data, &ah->iniBank3,
 233                       modesIndex);
 234         {
 235                 int i;
 236                 for (i = 0; i < ah->iniBank6TPC.ia_rows; i++) {
 237                         ah->analogBank6Data[i] =
 238                             INI_RA(&ah->iniBank6TPC, i, modesIndex);
 239                 }
 240         }
 241
 242         if (eepMinorRev >= 2) {
 243                 if (IS_CHAN_2GHZ(chan)) {
 244                         ob2GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_2);
 245                         db2GHz = ah->eep_ops->get_eeprom(ah, EEP_DB_2);
 246                         ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 247                                                    ob2GHz, 3, 197, 0);
 248                         ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 249                                                    db2GHz, 3, 194, 0);
 250                 } else {
 251                         ob5GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_5);
 252                         db5GHz = ah->eep_ops->get_eeprom(ah, EEP_DB_5);
 253                         ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 254                                                    ob5GHz, 3, 203, 0);
 255                         ath9k_phy_modify_rx_buffer(ah->analogBank6Data,
 256                                                    db5GHz, 3, 200, 0);
 257                 }
 258         }
 259
 260         RF_BANK_SETUP(ah->analogBank7Data, &ah->iniBank7, 1);
 261
 262         REG_WRITE_RF_ARRAY(&ah->iniBank0, ah->analogBank0Data,
 263                            regWrites);
 264         REG_WRITE_RF_ARRAY(&ah->iniBank1, ah->analogBank1Data,
 265                            regWrites);
 266         REG_WRITE_RF_ARRAY(&ah->iniBank2, ah->analogBank2Data,
 267                            regWrites);
 268         REG_WRITE_RF_ARRAY(&ah->iniBank3, ah->analogBank3Data,
 269                            regWrites);
 270         REG_WRITE_RF_ARRAY(&ah->iniBank6TPC, ah->analogBank6Data,
 271                            regWrites);
 272         REG_WRITE_RF_ARRAY(&ah->iniBank7, ah->analogBank7Data,
 273                            regWrites);
 274
 275         return true;
 276 }
 277
 278 void
 279 ath9k_hw_rf_free(struct ath_hw *ah)
 280 {
 281 #define ATH_FREE_BANK(bank) do { \
 282                 kfree(bank); \
 283                 bank = NULL; \
 284         } while (0);
 285
 286         ATH_FREE_BANK(ah->analogBank0Data);
 287         ATH_FREE_BANK(ah->analogBank1Data);
 288         ATH_FREE_BANK(ah->analogBank2Data);
 289         ATH_FREE_BANK(ah->analogBank3Data);
 290         ATH_FREE_BANK(ah->analogBank6Data);
 291         ATH_FREE_BANK(ah->analogBank6TPCData);
 292         ATH_FREE_BANK(ah->analogBank7Data);
 293         ATH_FREE_BANK(ah->addac5416_21);
 294         ATH_FREE_BANK(ah->bank6Temp);
 295 #undef ATH_FREE_BANK
 296 }
 297
 298 bool ath9k_hw_init_rf(struct ath_hw *ah, int *status)
 299 {
 300         struct ath_common *common = ath9k_hw_common(ah);
 301
 302         if (!AR_SREV_9280_10_OR_LATER(ah)) {
 303                 ah->analogBank0Data =
 304                     kzalloc((sizeof(u32) *
 305                              ah->iniBank0.ia_rows), GFP_KERNEL);
 306                 ah->analogBank1Data =
 307                     kzalloc((sizeof(u32) *
 308                              ah->iniBank1.ia_rows), GFP_KERNEL);
 309                 ah->analogBank2Data =
 310                     kzalloc((sizeof(u32) *
 311                              ah->iniBank2.ia_rows), GFP_KERNEL);
 312                 ah->analogBank3Data =
 313                     kzalloc((sizeof(u32) *
 314                              ah->iniBank3.ia_rows), GFP_KERNEL);
 315                 ah->analogBank6Data =
 316                     kzalloc((sizeof(u32) *
 317                              ah->iniBank6.ia_rows), GFP_KERNEL);
 318                 ah->analogBank6TPCData =
 319                     kzalloc((sizeof(u32) *
 320                              ah->iniBank6TPC.ia_rows), GFP_KERNEL);
 321                 ah->analogBank7Data =
 322                     kzalloc((sizeof(u32) *
 323                              ah->iniBank7.ia_rows), GFP_KERNEL);
 324
 325                 if (ah->analogBank0Data == NULL
 326                     || ah->analogBank1Data == NULL
 327                     || ah->analogBank2Data == NULL
 328                     || ah->analogBank3Data == NULL
 329                     || ah->analogBank6Data == NULL
 330                     || ah->analogBank6TPCData == NULL
 331                     || ah->analogBank7Data == NULL) {
 332                         ath_print(common, ATH_DBG_FATAL,
 333                                   "Cannot allocate RF banks\n");
 334                         *status = -ENOMEM;
 335                         return false;
 336                 }
 337
 338                 ah->addac5416_21 =
 339                     kzalloc((sizeof(u32) *
 340                              ah->iniAddac.ia_rows *
 341                              ah->iniAddac.ia_columns), GFP_KERNEL);
 342                 if (ah->addac5416_21 == NULL) {
 343                         ath_print(common, ATH_DBG_FATAL,
 344                                   "Cannot allocate addac5416_21\n");
 345                         *status = -ENOMEM;
 346                         return false;
 347                 }
 348
 349                 ah->bank6Temp =
 350                     kzalloc((sizeof(u32) *
 351                              ah->iniBank6.ia_rows), GFP_KERNEL);
 352                 if (ah->bank6Temp == NULL) {
 353                         ath_print(common, ATH_DBG_FATAL,
 354                                   "Cannot allocate bank6Temp\n");
 355                         *status = -ENOMEM;
 356                         return false;
 357                 }
 358         }
 359
 360         return true;
 361 }
 362
 363 void
 364 ath9k_hw_decrease_chain_power(struct ath_hw *ah, struct ath9k_channel *chan)
 365 {
 366         int i, regWrites = 0;
 367         u32 bank6SelMask;
 368         u32 *bank6Temp = ah->bank6Temp;
 369
 370         switch (ah->config.diversity_control) {
 371         case ATH9K_ANT_FIXED_A:
 372                 bank6SelMask =
 373                     (ah->config.antenna_switch_swap & ANTSWAP_AB) ?
 374                         REDUCE_CHAIN_0 : REDUCE_CHAIN_1;
 375                 break;
 376         case ATH9K_ANT_FIXED_B:
 377                 bank6SelMask =
 378                     (ah->config.antenna_switch_swap & ANTSWAP_AB) ?
 379                         REDUCE_CHAIN_1 : REDUCE_CHAIN_0;
 380                 break;
 381         case ATH9K_ANT_VARIABLE:
 382                 return;
 383                 break;
 384         default:
 385                 return;
 386                 break;
 387         }
 388
 389         for (i = 0; i < ah->iniBank6.ia_rows; i++)
 390                 bank6Temp[i] = ah->analogBank6Data[i];
 391
 392         REG_WRITE(ah, AR_PHY_BASE + 0xD8, bank6SelMask);
 393
 394         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 189, 0);
 395         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 190, 0);
 396         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 191, 0);
 397         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 192, 0);
 398         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 193, 0);
 399         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 222, 0);
 400         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 245, 0);
 401         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 246, 0);
 402         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 247, 0);
 403
 404         REG_WRITE_RF_ARRAY(&ah->iniBank6, bank6Temp, regWrites);
 405
 406         REG_WRITE(ah, AR_PHY_BASE + 0xD8, 0x00000053);
 407 #ifdef ALTER_SWITCH
 408         REG_WRITE(ah, PHY_SWITCH_CHAIN_0,
 409                   (REG_READ(ah, PHY_SWITCH_CHAIN_0) & ~0x38)
 410                   | ((REG_READ(ah, PHY_SWITCH_CHAIN_0) >> 3) & 0x38));
 411 #endif
 412 }