drivers/net/wireless/realtek/rtlwifi/rtl8192se/rf.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2012  Realtek Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * wlanfae <wlanfae@realtek.com>
  23  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  24  * Hsinchu 300, Taiwan.
  25  *
  26  * Larry Finger <Larry.Finger@lwfinger.net>
  27  *
  28  *****************************************************************************/
  29
  30 #include "../wifi.h"
  31 #include "reg.h"
  32 #include "def.h"
  33 #include "phy.h"
  34 #include "rf.h"
  35 #include "dm.h"
  36
  37
  38 static void _rtl92s_get_powerbase(struct ieee80211_hw *hw, u8 *p_pwrlevel,
  39                                   u8 chnl, u32 *ofdmbase, u32 *mcsbase,
  40                                   u8 *p_final_pwridx)
  41 {
  42         struct rtl_priv *rtlpriv = rtl_priv(hw);
  43         struct rtl_phy *rtlphy = &(rtlpriv->phy);
  44         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
  45         u32 pwrbase0, pwrbase1;
  46         u8 legacy_pwrdiff = 0, ht20_pwrdiff = 0;
  47         u8 i, pwrlevel[4];
  48
  49         for (i = 0; i < 2; i++)
  50                 pwrlevel[i] = p_pwrlevel[i];
  51
  52         /* We only care about the path A for legacy. */
  53         if (rtlefuse->eeprom_version < 2) {
  54                 pwrbase0 = pwrlevel[0] + (rtlefuse->legacy_httxpowerdiff & 0xf);
  55         } else {
  56                 legacy_pwrdiff = rtlefuse->txpwr_legacyhtdiff
  57                                                 [RF90_PATH_A][chnl - 1];
  58
  59                 /* For legacy OFDM, tx pwr always > HT OFDM pwr.
  60                  * We do not care Path B
  61                  * legacy OFDM pwr diff. NO BB register
  62                  * to notify HW. */
  63                 pwrbase0 = pwrlevel[0] + legacy_pwrdiff;
  64         }
  65
  66         pwrbase0 = (pwrbase0 << 24) | (pwrbase0 << 16) | (pwrbase0 << 8) |
  67                     pwrbase0;
  68         *ofdmbase = pwrbase0;
  69
  70         /* MCS rates */
  71         if (rtlefuse->eeprom_version >= 2) {
  72                 /* Check HT20 to HT40 diff      */
  73                 if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_20) {
  74                         for (i = 0; i < 2; i++) {
  75                                 /* rf-A, rf-B */
  76                                 /* HT 20<->40 pwr diff */
  77                                 ht20_pwrdiff = rtlefuse->txpwr_ht20diff
  78                                                         [i][chnl - 1];
  79
  80                                 if (ht20_pwrdiff < 8) /* 0~+7 */
  81                                         pwrlevel[i] += ht20_pwrdiff;
  82                                 else /* index8-15=-8~-1 */
  83                                         pwrlevel[i] -= (16 - ht20_pwrdiff);
  84                         }
  85                 }
  86         }
  87
  88         /* use index of rf-A */
  89         pwrbase1 = pwrlevel[0];
  90         pwrbase1 = (pwrbase1 << 24) | (pwrbase1 << 16) | (pwrbase1 << 8) |
  91                                 pwrbase1;
  92         *mcsbase = pwrbase1;
  93
  94         /* The following is for Antenna
  95          * diff from Ant-B to Ant-A */
  96         p_final_pwridx[0] = pwrlevel[0];
  97         p_final_pwridx[1] = pwrlevel[1];
  98
  99         switch (rtlefuse->eeprom_regulatory) {
 100         case 3:
 101                 /* The following is for calculation
 102                  * of the power diff for Ant-B to Ant-A. */
 103                 if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_20_40) {
 104                         p_final_pwridx[0] += rtlefuse->pwrgroup_ht40
 105                                                 [RF90_PATH_A][
 106                                                 chnl - 1];
 107                         p_final_pwridx[1] += rtlefuse->pwrgroup_ht40
 108                                                 [RF90_PATH_B][
 109                                                 chnl - 1];
 110                 } else {
 111                         p_final_pwridx[0] += rtlefuse->pwrgroup_ht20
 112                                                 [RF90_PATH_A][
 113                                                 chnl - 1];
 114                         p_final_pwridx[1] += rtlefuse->pwrgroup_ht20
 115                                                 [RF90_PATH_B][
 116                                                 chnl - 1];
 117                 }
 118                 break;
 119         default:
 120                 break;
 121         }
 122
 123         if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_20_40) {
 124                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 125                          "40MHz finalpwr_idx (A / B) = 0x%x / 0x%x\n",
 126                          p_final_pwridx[0], p_final_pwridx[1]);
 127         } else {
 128                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 129                          "20MHz finalpwr_idx (A / B) = 0x%x / 0x%x\n",
 130                          p_final_pwridx[0], p_final_pwridx[1]);
 131         }
 132 }
 133
 134 static void _rtl92s_set_antennadiff(struct ieee80211_hw *hw,
 135                                     u8 *p_final_pwridx)
 136 {
 137         struct rtl_priv *rtlpriv = rtl_priv(hw);
 138         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
 139         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 140         s8 ant_pwr_diff = 0;
 141         u32     u4reg_val = 0;
 142
 143         if (rtlphy->rf_type == RF_2T2R) {
 144                 ant_pwr_diff = p_final_pwridx[1] - p_final_pwridx[0];
 145
 146                 /* range is from 7~-8,
 147                  * index = 0x0~0xf */
 148                 if (ant_pwr_diff > 7)
 149                         ant_pwr_diff = 7;
 150                 if (ant_pwr_diff < -8)
 151                         ant_pwr_diff = -8;
 152
 153                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 154                          "Antenna Diff from RF-B to RF-A = %d (0x%x)\n",
 155                          ant_pwr_diff, ant_pwr_diff & 0xf);
 156
 157                 ant_pwr_diff &= 0xf;
 158         }
 159
 160         /* Antenna TX power difference */
 161         rtlefuse->antenna_txpwdiff[2] = 0;/* RF-D, don't care */
 162         rtlefuse->antenna_txpwdiff[1] = 0;/* RF-C, don't care */
 163         rtlefuse->antenna_txpwdiff[0] = (u8)(ant_pwr_diff);     /* RF-B */
 164
 165         u4reg_val = rtlefuse->antenna_txpwdiff[2] << 8 |
 166                                 rtlefuse->antenna_txpwdiff[1] << 4 |
 167                                 rtlefuse->antenna_txpwdiff[0];
 168
 169         rtl_set_bbreg(hw, RFPGA0_TXGAINSTAGE, (BXBTXAGC | BXCTXAGC | BXDTXAGC),
 170                       u4reg_val);
 171
 172         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD, "Write BCD-Diff(0x%x) = 0x%x\n",
 173                  RFPGA0_TXGAINSTAGE, u4reg_val);
 174 }
 175
 176 static void _rtl92s_get_txpower_writeval_byregulatory(struct ieee80211_hw *hw,
 177                                                       u8 chnl, u8 index,
 178                                                       u32 pwrbase0,
 179                                                       u32 pwrbase1,
 180                                                       u32 *p_outwrite_val)
 181 {
 182         struct rtl_priv *rtlpriv = rtl_priv(hw);
 183         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 184         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
 185         u8 i, chnlgroup, pwrdiff_limit[4];
 186         u32 writeval, customer_limit;
 187
 188         /* Index 0 & 1= legacy OFDM, 2-5=HT_MCS rate */
 189         switch (rtlefuse->eeprom_regulatory) {
 190         case 0:
 191                 /* Realtek better performance increase power diff
 192                  * defined by Realtek for large power */
 193                 chnlgroup = 0;
 194
 195                 writeval = rtlphy->mcs_offset[chnlgroup][index] +
 196                                 ((index < 2) ? pwrbase0 : pwrbase1);
 197
 198                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 199                          "RTK better performance, writeval = 0x%x\n", writeval);
 200                 break;
 201         case 1:
 202                 /* Realtek regulatory increase power diff defined
 203                  * by Realtek for regulatory */
 204                 if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_20_40) {
 205                         writeval = ((index < 2) ? pwrbase0 : pwrbase1);
 206
 207                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 208                                  "Realtek regulatory, 40MHz, writeval = 0x%x\n",
 209                                  writeval);
 210                 } else {
 211                         chnlgroup = 0;
 212
 213                         if (rtlphy->pwrgroup_cnt >= 3) {
 214                                 if (chnl <= 3)
 215                                         chnlgroup = 0;
 216                                 else if (chnl >= 4 && chnl <= 8)
 217                                         chnlgroup = 1;
 218                                 else if (chnl > 8)
 219                                         chnlgroup = 2;
 220                                 if (rtlphy->pwrgroup_cnt == 4)
 221                                         chnlgroup++;
 222                         }
 223
 224                         writeval = rtlphy->mcs_offset[chnlgroup][index]
 225                                         + ((index < 2) ?
 226                                         pwrbase0 : pwrbase1);
 227
 228                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 229                                  "Realtek regulatory, 20MHz, writeval = 0x%x\n",
 230                                  writeval);
 231                 }
 232                 break;
 233         case 2:
 234                 /* Better regulatory don't increase any power diff */
 235                 writeval = ((index < 2) ? pwrbase0 : pwrbase1);
 236                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 237                          "Better regulatory, writeval = 0x%x\n", writeval);
 238                 break;
 239         case 3:
 240                 /* Customer defined power diff. increase power diff
 241                   defined by customer. */
 242                 chnlgroup = 0;
 243
 244                 if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_20_40) {
 245                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 246                                  "customer's limit, 40MHz = 0x%x\n",
 247                                  rtlefuse->pwrgroup_ht40
 248                                  [RF90_PATH_A][chnl - 1]);
 249                 } else {
 250                         RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 251                                  "customer's limit, 20MHz = 0x%x\n",
 252                                  rtlefuse->pwrgroup_ht20
 253                                  [RF90_PATH_A][chnl - 1]);
 254                 }
 255
 256                 for (i = 0; i < 4; i++) {
 257                         pwrdiff_limit[i] = (u8)((rtlphy->mcs_offset
 258                                 [chnlgroup][index] & (0x7f << (i * 8)))
 259                                 >> (i * 8));
 260
 261                         if (rtlphy->current_chan_bw ==
 262                             HT_CHANNEL_WIDTH_20_40) {
 263                                 if (pwrdiff_limit[i] >
 264                                     rtlefuse->pwrgroup_ht40
 265                                     [RF90_PATH_A][chnl - 1]) {
 266                                         pwrdiff_limit[i] =
 267                                           rtlefuse->pwrgroup_ht40
 268                                           [RF90_PATH_A][chnl - 1];
 269                                 }
 270                         } else {
 271                                 if (pwrdiff_limit[i] >
 272                                     rtlefuse->pwrgroup_ht20
 273                                     [RF90_PATH_A][chnl - 1]) {
 274                                         pwrdiff_limit[i] =
 275                                             rtlefuse->pwrgroup_ht20
 276                                             [RF90_PATH_A][chnl - 1];
 277                                 }
 278                         }
 279                 }
 280
 281                 customer_limit = (pwrdiff_limit[3] << 24) |
 282                                 (pwrdiff_limit[2] << 16) |
 283                                 (pwrdiff_limit[1] << 8) |
 284                                 (pwrdiff_limit[0]);
 285                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 286                          "Customer's limit = 0x%x\n", customer_limit);
 287
 288                 writeval = customer_limit + ((index < 2) ?
 289                                              pwrbase0 : pwrbase1);
 290                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 291                          "Customer, writeval = 0x%x\n", writeval);
 292                 break;
 293         default:
 294                 chnlgroup = 0;
 295                 writeval = rtlphy->mcs_offset[chnlgroup][index] +
 296                                 ((index < 2) ? pwrbase0 : pwrbase1);
 297                 RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD,
 298                          "RTK better performance, writeval = 0x%x\n", writeval);
 299                 break;
 300         }
 301
 302         if (rtlpriv->dm.dynamic_txhighpower_lvl == TX_HIGH_PWR_LEVEL_LEVEL1)
 303                 writeval = 0x10101010;
 304         else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
 305                  TX_HIGH_PWR_LEVEL_LEVEL2)
 306                 writeval = 0x0;
 307
 308         *p_outwrite_val = writeval;
 309
 310 }
 311
 312 static void _rtl92s_write_ofdm_powerreg(struct ieee80211_hw *hw,
 313                                         u8 index, u32 val)
 314 {
 315         struct rtl_priv *rtlpriv = rtl_priv(hw);
 316         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 317         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
 318         u16 regoffset[6] = {0xe00, 0xe04, 0xe10, 0xe14, 0xe18, 0xe1c};
 319         u8 i, rfa_pwr[4];
 320         u8 rfa_lower_bound = 0, rfa_upper_bound = 0, rf_pwr_diff = 0;
 321         u32 writeval = val;
 322
 323         /* If path A and Path B coexist, we must limit Path A tx power.
 324          * Protect Path B pwr over or under flow. We need to calculate
 325          * upper and lower bound of path A tx power. */
 326         if (rtlphy->rf_type == RF_2T2R) {
 327                 rf_pwr_diff = rtlefuse->antenna_txpwdiff[0];
 328
 329                 /* Diff=-8~-1 */
 330                 if (rf_pwr_diff >= 8) {
 331                         /* Prevent underflow!! */
 332                         rfa_lower_bound = 0x10 - rf_pwr_diff;
 333                 /* if (rf_pwr_diff >= 0) Diff = 0-7 */
 334                 } else {
 335                         rfa_upper_bound = RF6052_MAX_TX_PWR - rf_pwr_diff;
 336                 }
 337         }
 338
 339         for (i = 0; i < 4; i++) {
 340                 rfa_pwr[i] = (u8)((writeval & (0x7f << (i * 8))) >> (i * 8));
 341                 if (rfa_pwr[i]  > RF6052_MAX_TX_PWR)
 342                         rfa_pwr[i]  = RF6052_MAX_TX_PWR;
 343
 344                 /* If path A and Path B coexist, we must limit Path A tx power.
 345                  * Protect Path B pwr over or under flow. We need to calculate
 346                  * upper and lower bound of path A tx power. */
 347                 if (rtlphy->rf_type == RF_2T2R) {
 348                         /* Diff=-8~-1 */
 349                         if (rf_pwr_diff >= 8) {
 350                                 /* Prevent underflow!! */
 351                                 if (rfa_pwr[i] < rfa_lower_bound)
 352                                         rfa_pwr[i] = rfa_lower_bound;
 353                         /* Diff = 0-7 */
 354                         } else if (rf_pwr_diff >= 1) {
 355                                 /* Prevent overflow */
 356                                 if (rfa_pwr[i] > rfa_upper_bound)
 357                                         rfa_pwr[i] = rfa_upper_bound;
 358                         }
 359                 }
 360
 361         }
 362
 363         writeval = (rfa_pwr[3] << 24) | (rfa_pwr[2] << 16) | (rfa_pwr[1] << 8) |
 364                                 rfa_pwr[0];
 365
 366         rtl_set_bbreg(hw, regoffset[index], 0x7f7f7f7f, writeval);
 367 }
 368
 369 void rtl92s_phy_rf6052_set_ofdmtxpower(struct ieee80211_hw *hw,
 370                                        u8 *p_pwrlevel, u8 chnl)
 371 {
 372         u32 writeval, pwrbase0, pwrbase1;
 373         u8 index = 0;
 374         u8 finalpwr_idx[4];
 375
 376         _rtl92s_get_powerbase(hw, p_pwrlevel, chnl, &pwrbase0, &pwrbase1,
 377                         &finalpwr_idx[0]);
 378         _rtl92s_set_antennadiff(hw, &finalpwr_idx[0]);
 379
 380         for (index = 0; index < 6; index++) {
 381                 _rtl92s_get_txpower_writeval_byregulatory(hw, chnl, index,
 382                                 pwrbase0, pwrbase1, &writeval);
 383
 384                 _rtl92s_write_ofdm_powerreg(hw, index, writeval);
 385         }
 386 }
 387
 388 void rtl92s_phy_rf6052_set_ccktxpower(struct ieee80211_hw *hw, u8 pwrlevel)
 389 {
 390         struct rtl_priv *rtlpriv = rtl_priv(hw);
 391         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 392         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
 393         u32 txagc = 0;
 394         bool dont_inc_cck_or_turboscanoff = false;
 395
 396         if (((rtlefuse->eeprom_version >= 2) &&
 397               (rtlefuse->txpwr_safetyflag == 1)) ||
 398               ((rtlefuse->eeprom_version >= 2) &&
 399               (rtlefuse->eeprom_regulatory != 0)))
 400                 dont_inc_cck_or_turboscanoff = true;
 401
 402         if (mac->act_scanning) {
 403                 txagc = 0x3f;
 404                 if (dont_inc_cck_or_turboscanoff)
 405                         txagc = pwrlevel;
 406         } else {
 407                 txagc = pwrlevel;
 408
 409                 if (rtlpriv->dm.dynamic_txhighpower_lvl ==
 410                     TX_HIGH_PWR_LEVEL_LEVEL1)
 411                         txagc = 0x10;
 412                 else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
 413                         TX_HIGH_PWR_LEVEL_LEVEL2)
 414                         txagc = 0x0;
 415         }
 416
 417         if (txagc > RF6052_MAX_TX_PWR)
 418                 txagc = RF6052_MAX_TX_PWR;
 419
 420         rtl_set_bbreg(hw, RTXAGC_CCK_MCS32, BTX_AGCRATECCK, txagc);
 421
 422 }
 423
 424 bool rtl92s_phy_rf6052_config(struct ieee80211_hw *hw)
 425 {
 426         struct rtl_priv *rtlpriv = rtl_priv(hw);
 427         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 428         u32 u4reg_val = 0;
 429         u8 rfpath;
 430         bool rtstatus = true;
 431         struct bb_reg_def *pphyreg;
 432
 433         /* Initialize RF */
 434         for (rfpath = 0; rfpath < rtlphy->num_total_rfpath; rfpath++) {
 435
 436                 pphyreg = &rtlphy->phyreg_def[rfpath];
 437
 438                 /* Store original RFENV control type */
 439                 switch (rfpath) {
 440                 case RF90_PATH_A:
 441                 case RF90_PATH_C:
 442                         u4reg_val = rtl92s_phy_query_bb_reg(hw,
 443                                                             pphyreg->rfintfs,
 444                                                             BRFSI_RFENV);
 445                         break;
 446                 case RF90_PATH_B:
 447                 case RF90_PATH_D:
 448                         u4reg_val = rtl92s_phy_query_bb_reg(hw,
 449                                                             pphyreg->rfintfs,
 450                                                             BRFSI_RFENV << 16);
 451                         break;
 452                 }
 453
 454                 /* Set RF_ENV enable */
 455                 rtl92s_phy_set_bb_reg(hw, pphyreg->rfintfe,
 456                                       BRFSI_RFENV << 16, 0x1);
 457
 458                 /* Set RF_ENV output high */
 459                 rtl92s_phy_set_bb_reg(hw, pphyreg->rfintfo, BRFSI_RFENV, 0x1);
 460
 461                 /* Set bit number of Address and Data for RF register */
 462                 rtl92s_phy_set_bb_reg(hw, pphyreg->rfhssi_para2,
 463                                 B3WIRE_ADDRESSLENGTH, 0x0);
 464                 rtl92s_phy_set_bb_reg(hw, pphyreg->rfhssi_para2,
 465                                 B3WIRE_DATALENGTH, 0x0);
 466
 467                 /* Initialize RF fom connfiguration file */
 468                 switch (rfpath) {
 469                 case RF90_PATH_A:
 470                         rtstatus = rtl92s_phy_config_rf(hw,
 471                                                 (enum radio_path)rfpath);
 472                         break;
 473                 case RF90_PATH_B:
 474                         rtstatus = rtl92s_phy_config_rf(hw,
 475                                                 (enum radio_path)rfpath);
 476                         break;
 477                 case RF90_PATH_C:
 478                         break;
 479                 case RF90_PATH_D:
 480                         break;
 481                 }
 482
 483                 /* Restore RFENV control type */
 484                 switch (rfpath) {
 485                 case RF90_PATH_A:
 486                 case RF90_PATH_C:
 487                         rtl92s_phy_set_bb_reg(hw, pphyreg->rfintfs, BRFSI_RFENV,
 488                                               u4reg_val);
 489                         break;
 490                 case RF90_PATH_B:
 491                 case RF90_PATH_D:
 492                         rtl92s_phy_set_bb_reg(hw, pphyreg->rfintfs,
 493                                               BRFSI_RFENV << 16,
 494                                               u4reg_val);
 495                         break;
 496                 }
 497
 498                 if (!rtstatus) {
 499                         pr_err("Radio[%d] Fail!!\n", rfpath);
 500                         goto fail;
 501                 }
 502
 503         }
 504
 505         return rtstatus;
 506
 507 fail:
 508         return rtstatus;
 509 }
 510
 511 void rtl92s_phy_rf6052_set_bandwidth(struct ieee80211_hw *hw, u8 bandwidth)
 512 {
 513         struct rtl_priv *rtlpriv = rtl_priv(hw);
 514         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 515
 516         switch (bandwidth) {
 517         case HT_CHANNEL_WIDTH_20:
 518                 rtlphy->rfreg_chnlval[0] = ((rtlphy->rfreg_chnlval[0] &
 519                                            0xfffff3ff) | 0x0400);
 520                 rtl_set_rfreg(hw, RF90_PATH_A, RF_CHNLBW, RFREG_OFFSET_MASK,
 521                                         rtlphy->rfreg_chnlval[0]);
 522                 break;
 523         case HT_CHANNEL_WIDTH_20_40:
 524                 rtlphy->rfreg_chnlval[0] = ((rtlphy->rfreg_chnlval[0] &
 525                                             0xfffff3ff));
 526                 rtl_set_rfreg(hw, RF90_PATH_A, RF_CHNLBW, RFREG_OFFSET_MASK,
 527                                         rtlphy->rfreg_chnlval[0]);
 528                 break;
 529         default:
 530                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 531                          "unknown bandwidth: %#X\n", bandwidth);
 532                 break;
 533         }
 534 }