git.oblomov.eu Git - linux-2.6/blob - 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 "core.h"
  18 #include "hw.h"
  19 #include "reg.h"
  20 #include "phy.h"
  21
  22 void
  23 ath9k_hw_write_regs(struct ath_hal *ah, u32 modesIndex, u32 freqIndex,
  24                     int regWrites)
  25 {
  26         struct ath_hal_5416 *ahp = AH5416(ah);
  27
  28         REG_WRITE_ARRAY(&ahp->ah_iniBB_RfGain, freqIndex, regWrites);
  29 }
  30
  31 bool
  32 ath9k_hw_set_channel(struct ath_hal *ah, struct ath9k_channel *chan)
  33 {
  34         u32 channelSel = 0;
  35         u32 bModeSynth = 0;
  36         u32 aModeRefSel = 0;
  37         u32 reg32 = 0;
  38         u16 freq;
  39         struct chan_centers centers;
  40
  41         ath9k_hw_get_channel_centers(ah, chan, &centers);
  42         freq = centers.synth_center;
  43
  44         if (freq < 4800) {
  45                 u32 txctl;
  46
  47                 if (((freq - 2192) % 5) == 0) {
  48                         channelSel = ((freq - 672) * 2 - 3040) / 10;
  49                         bModeSynth = 0;
  50                 } else if (((freq - 2224) % 5) == 0) {
  51                         channelSel = ((freq - 704) * 2 - 3040) / 10;
  52                         bModeSynth = 1;
  53                 } else {
  54                         DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
  55                                  "%s: invalid channel %u MHz\n", __func__,
  56                                  freq);
  57                         return false;
  58                 }
  59
  60                 channelSel = (channelSel << 2) & 0xff;
  61                 channelSel = ath9k_hw_reverse_bits(channelSel, 8);
  62
  63                 txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
  64                 if (freq == 2484) {
  65
  66                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
  67                                   txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
  68                 } else {
  69                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
  70                                   txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
  71                 }
  72
  73         } else if ((freq % 20) == 0 && freq >= 5120) {
  74                 channelSel =
  75                     ath9k_hw_reverse_bits(((freq - 4800) / 20 << 2), 8);
  76                 aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  77         } else if ((freq % 10) == 0) {
  78                 channelSel =
  79                     ath9k_hw_reverse_bits(((freq - 4800) / 10 << 1), 8);
  80                 if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah))
  81                         aModeRefSel = ath9k_hw_reverse_bits(2, 2);
  82                 else
  83                         aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  84         } else if ((freq % 5) == 0) {
  85                 channelSel = ath9k_hw_reverse_bits((freq - 4800) / 5, 8);
  86                 aModeRefSel = ath9k_hw_reverse_bits(1, 2);
  87         } else {
  88                 DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
  89                          "%s: invalid channel %u MHz\n", __func__, freq);
  90                 return false;
  91         }
  92
  93         reg32 =
  94             (channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) |
  95             (1 << 5) | 0x1;
  96
  97         REG_WRITE(ah, AR_PHY(0x37), reg32);
  98
  99         ah->ah_curchan = chan;
 100
 101         AH5416(ah)->ah_curchanRadIndex = -1;
 102
 103         return true;
 104 }
 105
 106 bool
 107 ath9k_hw_ar9280_set_channel(struct ath_hal *ah,
 108                             struct ath9k_channel *chan)
 109 {
 110         u16 bMode, fracMode, aModeRefSel = 0;
 111         u32 freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
 112         struct chan_centers centers;
 113         u32 refDivA = 24;
 114
 115         ath9k_hw_get_channel_centers(ah, chan, &centers);
 116         freq = centers.synth_center;
 117
 118         reg32 = REG_READ(ah, AR_PHY_SYNTH_CONTROL);
 119         reg32 &= 0xc0000000;
 120
 121         if (freq < 4800) {
 122                 u32 txctl;
 123
 124                 bMode = 1;
 125                 fracMode = 1;
 126                 aModeRefSel = 0;
 127                 channelSel = (freq * 0x10000) / 15;
 128
 129                 txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
 130                 if (freq == 2484) {
 131
 132                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 133                                   txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
 134                 } else {
 135                         REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
 136                                   txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
 137                 }
 138         } else {
 139                 bMode = 0;
 140                 fracMode = 0;
 141
 142                 if ((freq % 20) == 0) {
 143                         aModeRefSel = 3;
 144                 } else if ((freq % 10) == 0) {
 145                         aModeRefSel = 2;
 146                 } else {
 147                         aModeRefSel = 0;
 148
 149                         fracMode = 1;
 150                         refDivA = 1;
 151                         channelSel = (freq * 0x8000) / 15;
 152
 153                         REG_RMW_FIELD(ah, AR_AN_SYNTH9,
 154                                       AR_AN_SYNTH9_REFDIVA, refDivA);
 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->ah_curchan = chan;
 171
 172         AH5416(ah)->ah_curchanRadIndex = -1;
 173
 174         return true;
 175 }
 176
 177 static void
 178 ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
 179                            u32 numBits, u32 firstBit,
 180                            u32 column)
 181 {
 182         u32 tmp32, mask, arrayEntry, lastBit;
 183         int32_t bitPosition, bitsLeft;
 184
 185         tmp32 = ath9k_hw_reverse_bits(reg32, numBits);
 186         arrayEntry = (firstBit - 1) / 8;
 187         bitPosition = (firstBit - 1) % 8;
 188         bitsLeft = numBits;
 189         while (bitsLeft > 0) {
 190                 lastBit = (bitPosition + bitsLeft > 8) ?
 191                     8 : bitPosition + bitsLeft;
 192                 mask = (((1 << lastBit) - 1) ^ ((1 << bitPosition) - 1)) <<
 193                     (column * 8);
 194                 rfBuf[arrayEntry] &= ~mask;
 195                 rfBuf[arrayEntry] |= ((tmp32 << bitPosition) <<
 196                                       (column * 8)) & mask;
 197                 bitsLeft -= 8 - bitPosition;
 198                 tmp32 = tmp32 >> (8 - bitPosition);
 199                 bitPosition = 0;
 200                 arrayEntry++;
 201         }
 202 }
 203
 204 bool
 205 ath9k_hw_set_rf_regs(struct ath_hal *ah, struct ath9k_channel *chan,
 206                      u16 modesIndex)
 207 {
 208         struct ath_hal_5416 *ahp = AH5416(ah);
 209
 210         u32 eepMinorRev;
 211         u32 ob5GHz = 0, db5GHz = 0;
 212         u32 ob2GHz = 0, db2GHz = 0;
 213         int regWrites = 0;
 214
 215         if (AR_SREV_9280_10_OR_LATER(ah))
 216                 return true;
 217
 218         eepMinorRev = ath9k_hw_get_eeprom(ahp, EEP_MINOR_REV);
 219
 220         RF_BANK_SETUP(ahp->ah_analogBank0Data, &ahp->ah_iniBank0, 1);
 221
 222         RF_BANK_SETUP(ahp->ah_analogBank1Data, &ahp->ah_iniBank1, 1);
 223
 224         RF_BANK_SETUP(ahp->ah_analogBank2Data, &ahp->ah_iniBank2, 1);
 225
 226         RF_BANK_SETUP(ahp->ah_analogBank3Data, &ahp->ah_iniBank3,
 227                       modesIndex);
 228         {
 229                 int i;
 230                 for (i = 0; i < ahp->ah_iniBank6TPC.ia_rows; i++) {
 231                         ahp->ah_analogBank6Data[i] =
 232                             INI_RA(&ahp->ah_iniBank6TPC, i, modesIndex);
 233                 }
 234         }
 235
 236         if (eepMinorRev >= 2) {
 237                 if (IS_CHAN_2GHZ(chan)) {
 238                         ob2GHz = ath9k_hw_get_eeprom(ahp, EEP_OB_2);
 239                         db2GHz = ath9k_hw_get_eeprom(ahp, EEP_DB_2);
 240                         ath9k_phy_modify_rx_buffer(ahp->ah_analogBank6Data,
 241                                                    ob2GHz, 3, 197, 0);
 242                         ath9k_phy_modify_rx_buffer(ahp->ah_analogBank6Data,
 243                                                    db2GHz, 3, 194, 0);
 244                 } else {
 245                         ob5GHz = ath9k_hw_get_eeprom(ahp, EEP_OB_5);
 246                         db5GHz = ath9k_hw_get_eeprom(ahp, EEP_DB_5);
 247                         ath9k_phy_modify_rx_buffer(ahp->ah_analogBank6Data,
 248                                                    ob5GHz, 3, 203, 0);
 249                         ath9k_phy_modify_rx_buffer(ahp->ah_analogBank6Data,
 250                                                    db5GHz, 3, 200, 0);
 251                 }
 252         }
 253
 254         RF_BANK_SETUP(ahp->ah_analogBank7Data, &ahp->ah_iniBank7, 1);
 255
 256         REG_WRITE_RF_ARRAY(&ahp->ah_iniBank0, ahp->ah_analogBank0Data,
 257                            regWrites);
 258         REG_WRITE_RF_ARRAY(&ahp->ah_iniBank1, ahp->ah_analogBank1Data,
 259                            regWrites);
 260         REG_WRITE_RF_ARRAY(&ahp->ah_iniBank2, ahp->ah_analogBank2Data,
 261                            regWrites);
 262         REG_WRITE_RF_ARRAY(&ahp->ah_iniBank3, ahp->ah_analogBank3Data,
 263                            regWrites);
 264         REG_WRITE_RF_ARRAY(&ahp->ah_iniBank6TPC, ahp->ah_analogBank6Data,
 265                            regWrites);
 266         REG_WRITE_RF_ARRAY(&ahp->ah_iniBank7, ahp->ah_analogBank7Data,
 267                            regWrites);
 268
 269         return true;
 270 }
 271
 272 void
 273 ath9k_hw_rfdetach(struct ath_hal *ah)
 274 {
 275         struct ath_hal_5416 *ahp = AH5416(ah);
 276
 277         if (ahp->ah_analogBank0Data != NULL) {
 278                 kfree(ahp->ah_analogBank0Data);
 279                 ahp->ah_analogBank0Data = NULL;
 280         }
 281         if (ahp->ah_analogBank1Data != NULL) {
 282                 kfree(ahp->ah_analogBank1Data);
 283                 ahp->ah_analogBank1Data = NULL;
 284         }
 285         if (ahp->ah_analogBank2Data != NULL) {
 286                 kfree(ahp->ah_analogBank2Data);
 287                 ahp->ah_analogBank2Data = NULL;
 288         }
 289         if (ahp->ah_analogBank3Data != NULL) {
 290                 kfree(ahp->ah_analogBank3Data);
 291                 ahp->ah_analogBank3Data = NULL;
 292         }
 293         if (ahp->ah_analogBank6Data != NULL) {
 294                 kfree(ahp->ah_analogBank6Data);
 295                 ahp->ah_analogBank6Data = NULL;
 296         }
 297         if (ahp->ah_analogBank6TPCData != NULL) {
 298                 kfree(ahp->ah_analogBank6TPCData);
 299                 ahp->ah_analogBank6TPCData = NULL;
 300         }
 301         if (ahp->ah_analogBank7Data != NULL) {
 302                 kfree(ahp->ah_analogBank7Data);
 303                 ahp->ah_analogBank7Data = NULL;
 304         }
 305         if (ahp->ah_addac5416_21 != NULL) {
 306                 kfree(ahp->ah_addac5416_21);
 307                 ahp->ah_addac5416_21 = NULL;
 308         }
 309         if (ahp->ah_bank6Temp != NULL) {
 310                 kfree(ahp->ah_bank6Temp);
 311                 ahp->ah_bank6Temp = NULL;
 312         }
 313 }
 314
 315 bool ath9k_hw_init_rf(struct ath_hal *ah, int *status)
 316 {
 317         struct ath_hal_5416 *ahp = AH5416(ah);
 318
 319         if (!AR_SREV_9280_10_OR_LATER(ah)) {
 320
 321                 ahp->ah_analogBank0Data =
 322                     kzalloc((sizeof(u32) *
 323                              ahp->ah_iniBank0.ia_rows), GFP_KERNEL);
 324                 ahp->ah_analogBank1Data =
 325                     kzalloc((sizeof(u32) *
 326                              ahp->ah_iniBank1.ia_rows), GFP_KERNEL);
 327                 ahp->ah_analogBank2Data =
 328                     kzalloc((sizeof(u32) *
 329                              ahp->ah_iniBank2.ia_rows), GFP_KERNEL);
 330                 ahp->ah_analogBank3Data =
 331                     kzalloc((sizeof(u32) *
 332                              ahp->ah_iniBank3.ia_rows), GFP_KERNEL);
 333                 ahp->ah_analogBank6Data =
 334                     kzalloc((sizeof(u32) *
 335                              ahp->ah_iniBank6.ia_rows), GFP_KERNEL);
 336                 ahp->ah_analogBank6TPCData =
 337                     kzalloc((sizeof(u32) *
 338                              ahp->ah_iniBank6TPC.ia_rows), GFP_KERNEL);
 339                 ahp->ah_analogBank7Data =
 340                     kzalloc((sizeof(u32) *
 341                              ahp->ah_iniBank7.ia_rows), GFP_KERNEL);
 342
 343                 if (ahp->ah_analogBank0Data == NULL
 344                     || ahp->ah_analogBank1Data == NULL
 345                     || ahp->ah_analogBank2Data == NULL
 346                     || ahp->ah_analogBank3Data == NULL
 347                     || ahp->ah_analogBank6Data == NULL
 348                     || ahp->ah_analogBank6TPCData == NULL
 349                     || ahp->ah_analogBank7Data == NULL) {
 350                         DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 351                                  "%s: cannot allocate RF banks\n",
 352                                  __func__);
 353                         *status = -ENOMEM;
 354                         return false;
 355                 }
 356
 357                 ahp->ah_addac5416_21 =
 358                     kzalloc((sizeof(u32) *
 359                              ahp->ah_iniAddac.ia_rows *
 360                              ahp->ah_iniAddac.ia_columns), GFP_KERNEL);
 361                 if (ahp->ah_addac5416_21 == NULL) {
 362                         DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 363                                  "%s: cannot allocate ah_addac5416_21\n",
 364                                  __func__);
 365                         *status = -ENOMEM;
 366                         return false;
 367                 }
 368
 369                 ahp->ah_bank6Temp =
 370                     kzalloc((sizeof(u32) *
 371                              ahp->ah_iniBank6.ia_rows), GFP_KERNEL);
 372                 if (ahp->ah_bank6Temp == NULL) {
 373                         DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
 374                                  "%s: cannot allocate ah_bank6Temp\n",
 375                                  __func__);
 376                         *status = -ENOMEM;
 377                         return false;
 378                 }
 379         }
 380
 381         return true;
 382 }
 383
 384 void
 385 ath9k_hw_decrease_chain_power(struct ath_hal *ah, struct ath9k_channel *chan)
 386 {
 387         int i, regWrites = 0;
 388         struct ath_hal_5416 *ahp = AH5416(ah);
 389         u32 bank6SelMask;
 390         u32 *bank6Temp = ahp->ah_bank6Temp;
 391
 392         switch (ahp->ah_diversityControl) {
 393         case ATH9K_ANT_FIXED_A:
 394                 bank6SelMask =
 395                     (ahp->
 396                      ah_antennaSwitchSwap & ANTSWAP_AB) ? REDUCE_CHAIN_0 :
 397                     REDUCE_CHAIN_1;
 398                 break;
 399         case ATH9K_ANT_FIXED_B:
 400                 bank6SelMask =
 401                     (ahp->
 402                      ah_antennaSwitchSwap & ANTSWAP_AB) ? REDUCE_CHAIN_1 :
 403                     REDUCE_CHAIN_0;
 404                 break;
 405         case ATH9K_ANT_VARIABLE:
 406                 return;
 407                 break;
 408         default:
 409                 return;
 410                 break;
 411         }
 412
 413         for (i = 0; i < ahp->ah_iniBank6.ia_rows; i++)
 414                 bank6Temp[i] = ahp->ah_analogBank6Data[i];
 415
 416         REG_WRITE(ah, AR_PHY_BASE + 0xD8, bank6SelMask);
 417
 418         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 189, 0);
 419         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 190, 0);
 420         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 191, 0);
 421         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 192, 0);
 422         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 193, 0);
 423         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 222, 0);
 424         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 245, 0);
 425         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 246, 0);
 426         ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 247, 0);
 427
 428         REG_WRITE_RF_ARRAY(&ahp->ah_iniBank6, bank6Temp, regWrites);
 429
 430         REG_WRITE(ah, AR_PHY_BASE + 0xD8, 0x00000053);
 431 #ifdef ALTER_SWITCH
 432         REG_WRITE(ah, PHY_SWITCH_CHAIN_0,
 433                   (REG_READ(ah, PHY_SWITCH_CHAIN_0) & ~0x38)
 434                   | ((REG_READ(ah, PHY_SWITCH_CHAIN_0) >> 3) & 0x38));
 435 #endif
 436 }