kernel/drivers/net/wireless/ath/ath9k/ar9002_hw.c

   1 /*
   2  * Copyright (c) 2008-2011 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 <linux/moduleparam.h>
  18 #include "hw.h"
  19 #include "ar5008_initvals.h"
  20 #include "ar9001_initvals.h"
  21 #include "ar9002_initvals.h"
  22 #include "ar9002_phy.h"
  23
  24 /* General hardware code for the A5008/AR9001/AR9002 hadware families */
  25
  26 static int ar9002_hw_init_mode_regs(struct ath_hw *ah)
  27 {
  28         if (AR_SREV_9271(ah)) {
  29                 INIT_INI_ARRAY(&ah->iniModes, ar9271Modes_9271);
  30                 INIT_INI_ARRAY(&ah->iniCommon, ar9271Common_9271);
  31                 INIT_INI_ARRAY(&ah->iniModes_9271_ANI_reg, ar9271Modes_9271_ANI_reg);
  32                 return 0;
  33         }
  34
  35         INIT_INI_ARRAY(&ah->iniPcieSerdes,
  36                        ar9280PciePhy_clkreq_always_on_L1_9280);
  37
  38         if (AR_SREV_9287_11_OR_LATER(ah)) {
  39                 INIT_INI_ARRAY(&ah->iniModes, ar9287Modes_9287_1_1);
  40                 INIT_INI_ARRAY(&ah->iniCommon, ar9287Common_9287_1_1);
  41         } else if (AR_SREV_9285_12_OR_LATER(ah)) {
  42                 INIT_INI_ARRAY(&ah->iniModes, ar9285Modes_9285_1_2);
  43                 INIT_INI_ARRAY(&ah->iniCommon, ar9285Common_9285_1_2);
  44         } else if (AR_SREV_9280_20_OR_LATER(ah)) {
  45                 INIT_INI_ARRAY(&ah->iniModes, ar9280Modes_9280_2);
  46                 INIT_INI_ARRAY(&ah->iniCommon, ar9280Common_9280_2);
  47
  48                 INIT_INI_ARRAY(&ah->iniModesFastClock,
  49                                ar9280Modes_fast_clock_9280_2);
  50         } else if (AR_SREV_9160_10_OR_LATER(ah)) {
  51                 INIT_INI_ARRAY(&ah->iniModes, ar5416Modes_9160);
  52                 INIT_INI_ARRAY(&ah->iniCommon, ar5416Common_9160);
  53                 if (AR_SREV_9160_11(ah)) {
  54                         INIT_INI_ARRAY(&ah->iniAddac,
  55                                        ar5416Addac_9160_1_1);
  56                 } else {
  57                         INIT_INI_ARRAY(&ah->iniAddac, ar5416Addac_9160);
  58                 }
  59         } else if (AR_SREV_9100_OR_LATER(ah)) {
  60                 INIT_INI_ARRAY(&ah->iniModes, ar5416Modes_9100);
  61                 INIT_INI_ARRAY(&ah->iniCommon, ar5416Common_9100);
  62                 INIT_INI_ARRAY(&ah->iniAddac, ar5416Addac_9100);
  63         } else {
  64                 INIT_INI_ARRAY(&ah->iniModes, ar5416Modes);
  65                 INIT_INI_ARRAY(&ah->iniCommon, ar5416Common);
  66                 INIT_INI_ARRAY(&ah->iniAddac, ar5416Addac);
  67         }
  68
  69         if (!AR_SREV_9280_20_OR_LATER(ah)) {
  70                 /* Common for AR5416, AR913x, AR9160 */
  71                 INIT_INI_ARRAY(&ah->iniBB_RfGain, ar5416BB_RfGain);
  72
  73                 /* Common for AR913x, AR9160 */
  74                 if (!AR_SREV_5416(ah))
  75                         INIT_INI_ARRAY(&ah->iniBank6, ar5416Bank6TPC_9100);
  76                 else
  77                         INIT_INI_ARRAY(&ah->iniBank6, ar5416Bank6TPC);
  78         }
  79
  80         /* iniAddac needs to be modified for these chips */
  81         if (AR_SREV_9160(ah) || !AR_SREV_5416_22_OR_LATER(ah)) {
  82                 struct ar5416IniArray *addac = &ah->iniAddac;
  83                 u32 size = sizeof(u32) * addac->ia_rows * addac->ia_columns;
  84                 u32 *data;
  85
  86                 data = devm_kzalloc(ah->dev, size, GFP_KERNEL);
  87                 if (!data)
  88                         return -ENOMEM;
  89
  90                 memcpy(data, addac->ia_array, size);
  91                 addac->ia_array = data;
  92
  93                 if (!AR_SREV_5416_22_OR_LATER(ah)) {
  94                         /* override CLKDRV value */
  95                         INI_RA(addac, 31,1) = 0;
  96                 }
  97         }
  98         if (AR_SREV_9287_11_OR_LATER(ah)) {
  99                 INIT_INI_ARRAY(&ah->iniCckfirNormal,
 100                        ar9287Common_normal_cck_fir_coeff_9287_1_1);
 101                 INIT_INI_ARRAY(&ah->iniCckfirJapan2484,
 102                        ar9287Common_japan_2484_cck_fir_coeff_9287_1_1);
 103         }
 104         return 0;
 105 }
 106
 107 static void ar9280_20_hw_init_rxgain_ini(struct ath_hw *ah)
 108 {
 109         u32 rxgain_type;
 110
 111         if (ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV) >=
 112             AR5416_EEP_MINOR_VER_17) {
 113                 rxgain_type = ah->eep_ops->get_eeprom(ah, EEP_RXGAIN_TYPE);
 114
 115                 if (rxgain_type == AR5416_EEP_RXGAIN_13DB_BACKOFF)
 116                         INIT_INI_ARRAY(&ah->iniModesRxGain,
 117                                        ar9280Modes_backoff_13db_rxgain_9280_2);
 118                 else if (rxgain_type == AR5416_EEP_RXGAIN_23DB_BACKOFF)
 119                         INIT_INI_ARRAY(&ah->iniModesRxGain,
 120                                        ar9280Modes_backoff_23db_rxgain_9280_2);
 121                 else
 122                         INIT_INI_ARRAY(&ah->iniModesRxGain,
 123                                        ar9280Modes_original_rxgain_9280_2);
 124         } else {
 125                 INIT_INI_ARRAY(&ah->iniModesRxGain,
 126                                ar9280Modes_original_rxgain_9280_2);
 127         }
 128 }
 129
 130 static void ar9280_20_hw_init_txgain_ini(struct ath_hw *ah, u32 txgain_type)
 131 {
 132         if (ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV) >=
 133             AR5416_EEP_MINOR_VER_19) {
 134                 if (txgain_type == AR5416_EEP_TXGAIN_HIGH_POWER)
 135                         INIT_INI_ARRAY(&ah->iniModesTxGain,
 136                                        ar9280Modes_high_power_tx_gain_9280_2);
 137                 else
 138                         INIT_INI_ARRAY(&ah->iniModesTxGain,
 139                                        ar9280Modes_original_tx_gain_9280_2);
 140         } else {
 141                 INIT_INI_ARRAY(&ah->iniModesTxGain,
 142                                ar9280Modes_original_tx_gain_9280_2);
 143         }
 144 }
 145
 146 static void ar9271_hw_init_txgain_ini(struct ath_hw *ah, u32 txgain_type)
 147 {
 148         if (txgain_type == AR5416_EEP_TXGAIN_HIGH_POWER)
 149                 INIT_INI_ARRAY(&ah->iniModesTxGain,
 150                                ar9271Modes_high_power_tx_gain_9271);
 151         else
 152                 INIT_INI_ARRAY(&ah->iniModesTxGain,
 153                                ar9271Modes_normal_power_tx_gain_9271);
 154 }
 155
 156 static void ar9002_hw_init_mode_gain_regs(struct ath_hw *ah)
 157 {
 158         u32 txgain_type = ah->eep_ops->get_eeprom(ah, EEP_TXGAIN_TYPE);
 159
 160         if (AR_SREV_9287_11_OR_LATER(ah))
 161                 INIT_INI_ARRAY(&ah->iniModesRxGain,
 162                                ar9287Modes_rx_gain_9287_1_1);
 163         else if (AR_SREV_9280_20(ah))
 164                 ar9280_20_hw_init_rxgain_ini(ah);
 165
 166         if (AR_SREV_9271(ah)) {
 167                 ar9271_hw_init_txgain_ini(ah, txgain_type);
 168         } else if (AR_SREV_9287_11_OR_LATER(ah)) {
 169                 INIT_INI_ARRAY(&ah->iniModesTxGain,
 170                                ar9287Modes_tx_gain_9287_1_1);
 171         } else if (AR_SREV_9280_20(ah)) {
 172                 ar9280_20_hw_init_txgain_ini(ah, txgain_type);
 173         } else if (AR_SREV_9285_12_OR_LATER(ah)) {
 174                 /* txgain table */
 175                 if (txgain_type == AR5416_EEP_TXGAIN_HIGH_POWER) {
 176                         if (AR_SREV_9285E_20(ah)) {
 177                                 INIT_INI_ARRAY(&ah->iniModesTxGain,
 178                                                ar9285Modes_XE2_0_high_power);
 179                         } else {
 180                                 INIT_INI_ARRAY(&ah->iniModesTxGain,
 181                                         ar9285Modes_high_power_tx_gain_9285_1_2);
 182                         }
 183                 } else {
 184                         if (AR_SREV_9285E_20(ah)) {
 185                                 INIT_INI_ARRAY(&ah->iniModesTxGain,
 186                                                ar9285Modes_XE2_0_normal_power);
 187                         } else {
 188                                 INIT_INI_ARRAY(&ah->iniModesTxGain,
 189                                         ar9285Modes_original_tx_gain_9285_1_2);
 190                         }
 191                 }
 192         }
 193 }
 194
 195 /*
 196  * Helper for ASPM support.
 197  *
 198  * Disable PLL when in L0s as well as receiver clock when in L1.
 199  * This power saving option must be enabled through the SerDes.
 200  *
 201  * Programming the SerDes must go through the same 288 bit serial shift
 202  * register as the other analog registers.  Hence the 9 writes.
 203  */
 204 static void ar9002_hw_configpcipowersave(struct ath_hw *ah,
 205                                          bool power_off)
 206 {
 207         u8 i;
 208         u32 val;
 209
 210         /* Nothing to do on restore for 11N */
 211         if (!power_off /* !restore */) {
 212                 if (AR_SREV_9280_20_OR_LATER(ah)) {
 213                         /*
 214                          * AR9280 2.0 or later chips use SerDes values from the
 215                          * initvals.h initialized depending on chipset during
 216                          * __ath9k_hw_init()
 217                          */
 218                         for (i = 0; i < ah->iniPcieSerdes.ia_rows; i++) {
 219                                 REG_WRITE(ah, INI_RA(&ah->iniPcieSerdes, i, 0),
 220                                           INI_RA(&ah->iniPcieSerdes, i, 1));
 221                         }
 222                 } else {
 223                         ENABLE_REGWRITE_BUFFER(ah);
 224
 225                         REG_WRITE(ah, AR_PCIE_SERDES, 0x9248fc00);
 226                         REG_WRITE(ah, AR_PCIE_SERDES, 0x24924924);
 227
 228                         /* RX shut off when elecidle is asserted */
 229                         REG_WRITE(ah, AR_PCIE_SERDES, 0x28000039);
 230                         REG_WRITE(ah, AR_PCIE_SERDES, 0x53160824);
 231                         REG_WRITE(ah, AR_PCIE_SERDES, 0xe5980579);
 232
 233                         /*
 234                          * Ignore ah->ah_config.pcie_clock_req setting for
 235                          * pre-AR9280 11n
 236                          */
 237                         REG_WRITE(ah, AR_PCIE_SERDES, 0x001defff);
 238
 239                         REG_WRITE(ah, AR_PCIE_SERDES, 0x1aaabe40);
 240                         REG_WRITE(ah, AR_PCIE_SERDES, 0xbe105554);
 241                         REG_WRITE(ah, AR_PCIE_SERDES, 0x000e3007);
 242
 243                         /* Load the new settings */
 244                         REG_WRITE(ah, AR_PCIE_SERDES2, 0x00000000);
 245
 246                         REGWRITE_BUFFER_FLUSH(ah);
 247                 }
 248
 249                 udelay(1000);
 250         }
 251
 252         if (power_off) {
 253                 /* clear bit 19 to disable L1 */
 254                 REG_CLR_BIT(ah, AR_PCIE_PM_CTRL, AR_PCIE_PM_CTRL_ENA);
 255
 256                 val = REG_READ(ah, AR_WA);
 257
 258                 /*
 259                  * Set PCIe workaround bits
 260                  * In AR9280 and AR9285, bit 14 in WA register (disable L1)
 261                  * should only  be set when device enters D3 and be
 262                  * cleared when device comes back to D0.
 263                  */
 264                 if (ah->config.pcie_waen) {
 265                         if (ah->config.pcie_waen & AR_WA_D3_L1_DISABLE)
 266                                 val |= AR_WA_D3_L1_DISABLE;
 267                 } else {
 268                         if (AR_SREV_9285(ah) || AR_SREV_9271(ah) || AR_SREV_9287(ah)) {
 269                                 if (AR9285_WA_DEFAULT & AR_WA_D3_L1_DISABLE)
 270                                         val |= AR_WA_D3_L1_DISABLE;
 271                         } else if (AR_SREV_9280(ah)) {
 272                                 if (AR9280_WA_DEFAULT & AR_WA_D3_L1_DISABLE)
 273                                         val |= AR_WA_D3_L1_DISABLE;
 274                         }
 275                 }
 276
 277                 if (AR_SREV_9280(ah) || AR_SREV_9285(ah) || AR_SREV_9287(ah)) {
 278                         /*
 279                          * Disable bit 6 and 7 before entering D3 to
 280                          * prevent system hang.
 281                          */
 282                         val &= ~(AR_WA_BIT6 | AR_WA_BIT7);
 283                 }
 284
 285                 if (AR_SREV_9280(ah))
 286                         val |= AR_WA_BIT22;
 287
 288                 if (AR_SREV_9285E_20(ah))
 289                         val |= AR_WA_BIT23;
 290
 291                 REG_WRITE(ah, AR_WA, val);
 292         } else {
 293                 if (ah->config.pcie_waen) {
 294                         val = ah->config.pcie_waen;
 295                         val &= (~AR_WA_D3_L1_DISABLE);
 296                 } else {
 297                         if (AR_SREV_9285(ah) || AR_SREV_9271(ah) || AR_SREV_9287(ah)) {
 298                                 val = AR9285_WA_DEFAULT;
 299                                 val &= (~AR_WA_D3_L1_DISABLE);
 300                         } else if (AR_SREV_9280(ah)) {
 301                                 /*
 302                                  * For AR9280 chips, bit 22 of 0x4004
 303                                  * needs to be set.
 304                                  */
 305                                 val = AR9280_WA_DEFAULT;
 306                                 val &= (~AR_WA_D3_L1_DISABLE);
 307                         } else {
 308                                 val = AR_WA_DEFAULT;
 309                         }
 310                 }
 311
 312                 /* WAR for ASPM system hang */
 313                 if (AR_SREV_9285(ah) || AR_SREV_9287(ah))
 314                         val |= (AR_WA_BIT6 | AR_WA_BIT7);
 315
 316                 if (AR_SREV_9285E_20(ah))
 317                         val |= AR_WA_BIT23;
 318
 319                 REG_WRITE(ah, AR_WA, val);
 320
 321                 /* set bit 19 to allow forcing of pcie core into L1 state */
 322                 REG_SET_BIT(ah, AR_PCIE_PM_CTRL, AR_PCIE_PM_CTRL_ENA);
 323         }
 324 }
 325
 326 static int ar9002_hw_get_radiorev(struct ath_hw *ah)
 327 {
 328         u32 val;
 329         int i;
 330
 331         ENABLE_REGWRITE_BUFFER(ah);
 332
 333         REG_WRITE(ah, AR_PHY(0x36), 0x00007058);
 334         for (i = 0; i < 8; i++)
 335                 REG_WRITE(ah, AR_PHY(0x20), 0x00010000);
 336
 337         REGWRITE_BUFFER_FLUSH(ah);
 338
 339         val = (REG_READ(ah, AR_PHY(256)) >> 24) & 0xff;
 340         val = ((val & 0xf0) >> 4) | ((val & 0x0f) << 4);
 341
 342         return ath9k_hw_reverse_bits(val, 8);
 343 }
 344
 345 int ar9002_hw_rf_claim(struct ath_hw *ah)
 346 {
 347         u32 val;
 348
 349         REG_WRITE(ah, AR_PHY(0), 0x00000007);
 350
 351         val = ar9002_hw_get_radiorev(ah);
 352         switch (val & AR_RADIO_SREV_MAJOR) {
 353         case 0:
 354                 val = AR_RAD5133_SREV_MAJOR;
 355                 break;
 356         case AR_RAD5133_SREV_MAJOR:
 357         case AR_RAD5122_SREV_MAJOR:
 358         case AR_RAD2133_SREV_MAJOR:
 359         case AR_RAD2122_SREV_MAJOR:
 360                 break;
 361         default:
 362                 ath_err(ath9k_hw_common(ah),
 363                         "Radio Chip Rev 0x%02X not supported\n",
 364                         val & AR_RADIO_SREV_MAJOR);
 365                 return -EOPNOTSUPP;
 366         }
 367
 368         ah->hw_version.analog5GhzRev = val;
 369
 370         return 0;
 371 }
 372
 373 void ar9002_hw_enable_async_fifo(struct ath_hw *ah)
 374 {
 375         if (AR_SREV_9287_13_OR_LATER(ah)) {
 376                 REG_SET_BIT(ah, AR_MAC_PCU_ASYNC_FIFO_REG3,
 377                                 AR_MAC_PCU_ASYNC_FIFO_REG3_DATAPATH_SEL);
 378                 REG_SET_BIT(ah, AR_PHY_MODE, AR_PHY_MODE_ASYNCFIFO);
 379                 REG_CLR_BIT(ah, AR_MAC_PCU_ASYNC_FIFO_REG3,
 380                                 AR_MAC_PCU_ASYNC_FIFO_REG3_SOFT_RESET);
 381                 REG_SET_BIT(ah, AR_MAC_PCU_ASYNC_FIFO_REG3,
 382                                 AR_MAC_PCU_ASYNC_FIFO_REG3_SOFT_RESET);
 383         }
 384 }
 385
 386 static void ar9002_hw_init_hang_checks(struct ath_hw *ah)
 387 {
 388         if (AR_SREV_9100(ah) || AR_SREV_9160(ah)) {
 389                 ah->config.hw_hang_checks |= HW_BB_RIFS_HANG;
 390                 ah->config.hw_hang_checks |= HW_BB_DFS_HANG;
 391         }
 392
 393         if (AR_SREV_9280(ah))
 394                 ah->config.hw_hang_checks |= HW_BB_RX_CLEAR_STUCK_HANG;
 395
 396         if (AR_SREV_5416(ah) || AR_SREV_9100(ah) || AR_SREV_9160(ah))
 397                 ah->config.hw_hang_checks |= HW_MAC_HANG;
 398 }
 399
 400 /* Sets up the AR5008/AR9001/AR9002 hardware familiy callbacks */
 401 int ar9002_hw_attach_ops(struct ath_hw *ah)
 402 {
 403         struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
 404         struct ath_hw_ops *ops = ath9k_hw_ops(ah);
 405         int ret;
 406
 407         ret = ar9002_hw_init_mode_regs(ah);
 408         if (ret)
 409                 return ret;
 410
 411         priv_ops->init_mode_gain_regs = ar9002_hw_init_mode_gain_regs;
 412         priv_ops->init_hang_checks = ar9002_hw_init_hang_checks;
 413
 414         ops->config_pci_powersave = ar9002_hw_configpcipowersave;
 415
 416         ret = ar5008_hw_attach_phy_ops(ah);
 417         if (ret)
 418                 return ret;
 419
 420         if (AR_SREV_9280_20_OR_LATER(ah))
 421                 ar9002_hw_attach_phy_ops(ah);
 422
 423         ar9002_hw_attach_calib_ops(ah);
 424         ar9002_hw_attach_mac_ops(ah);
 425         return 0;
 426 }
 427
 428 void ar9002_hw_load_ani_reg(struct ath_hw *ah, struct ath9k_channel *chan)
 429 {
 430         u32 modesIndex;
 431         int i;
 432
 433         if (IS_CHAN_5GHZ(chan))
 434                 modesIndex = IS_CHAN_HT40(chan) ? 2 : 1;
 435         else
 436                 modesIndex = IS_CHAN_HT40(chan) ? 3 : 4;
 437
 438         ENABLE_REGWRITE_BUFFER(ah);
 439
 440         for (i = 0; i < ah->iniModes_9271_ANI_reg.ia_rows; i++) {
 441                 u32 reg = INI_RA(&ah->iniModes_9271_ANI_reg, i, 0);
 442                 u32 val = INI_RA(&ah->iniModes_9271_ANI_reg, i, modesIndex);
 443                 u32 val_orig;
 444
 445                 if (reg == AR_PHY_CCK_DETECT) {
 446                         val_orig = REG_READ(ah, reg);
 447                         val &= AR_PHY_CCK_DETECT_WEAK_SIG_THR_CCK;
 448                         val_orig &= ~AR_PHY_CCK_DETECT_WEAK_SIG_THR_CCK;
 449
 450                         REG_WRITE(ah, reg, val|val_orig);
 451                 } else
 452                         REG_WRITE(ah, reg, val);
 453         }
 454
 455         REGWRITE_BUFFER_FLUSH(ah);
 456 }