drivers/net/wireless/ath/ath9k/eeprom.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 static inline u16 ath9k_hw_fbin2freq(u8 fbin, bool is2GHz)
  20 {
  21         if (fbin == AR5416_BCHAN_UNUSED)
  22                 return fbin;
  23
  24         return (u16) ((is2GHz) ? (2300 + fbin) : (4800 + 5 * fbin));
  25 }
  26
  27 void ath9k_hw_analog_shift_regwrite(struct ath_hw *ah, u32 reg, u32 val)
  28 {
  29         REG_WRITE(ah, reg, val);
  30
  31         if (ah->config.analog_shiftreg)
  32                 udelay(100);
  33 }
  34
  35 void ath9k_hw_analog_shift_rmw(struct ath_hw *ah, u32 reg, u32 mask,
  36                                u32 shift, u32 val)
  37 {
  38         u32 regVal;
  39
  40         regVal = REG_READ(ah, reg) & ~mask;
  41         regVal |= (val << shift) & mask;
  42
  43         REG_WRITE(ah, reg, regVal);
  44
  45         if (ah->config.analog_shiftreg)
  46                 udelay(100);
  47 }
  48
  49 int16_t ath9k_hw_interpolate(u16 target, u16 srcLeft, u16 srcRight,
  50                              int16_t targetLeft, int16_t targetRight)
  51 {
  52         int16_t rv;
  53
  54         if (srcRight == srcLeft) {
  55                 rv = targetLeft;
  56         } else {
  57                 rv = (int16_t) (((target - srcLeft) * targetRight +
  58                                  (srcRight - target) * targetLeft) /
  59                                 (srcRight - srcLeft));
  60         }
  61         return rv;
  62 }
  63
  64 bool ath9k_hw_get_lower_upper_index(u8 target, u8 *pList, u16 listSize,
  65                                     u16 *indexL, u16 *indexR)
  66 {
  67         u16 i;
  68
  69         if (target <= pList[0]) {
  70                 *indexL = *indexR = 0;
  71                 return true;
  72         }
  73         if (target >= pList[listSize - 1]) {
  74                 *indexL = *indexR = (u16) (listSize - 1);
  75                 return true;
  76         }
  77
  78         for (i = 0; i < listSize - 1; i++) {
  79                 if (pList[i] == target) {
  80                         *indexL = *indexR = i;
  81                         return true;
  82                 }
  83                 if (target < pList[i + 1]) {
  84                         *indexL = i;
  85                         *indexR = (u16) (i + 1);
  86                         return false;
  87                 }
  88         }
  89         return false;
  90 }
  91
  92 bool ath9k_hw_nvram_read(struct ath_common *common, u32 off, u16 *data)
  93 {
  94         return common->bus_ops->eeprom_read(common, off, data);
  95 }
  96
  97 void ath9k_hw_fill_vpd_table(u8 pwrMin, u8 pwrMax, u8 *pPwrList,
  98                              u8 *pVpdList, u16 numIntercepts,
  99                              u8 *pRetVpdList)
 100 {
 101         u16 i, k;
 102         u8 currPwr = pwrMin;
 103         u16 idxL = 0, idxR = 0;
 104
 105         for (i = 0; i <= (pwrMax - pwrMin) / 2; i++) {
 106                 ath9k_hw_get_lower_upper_index(currPwr, pPwrList,
 107                                                numIntercepts, &(idxL),
 108                                                &(idxR));
 109                 if (idxR < 1)
 110                         idxR = 1;
 111                 if (idxL == numIntercepts - 1)
 112                         idxL = (u16) (numIntercepts - 2);
 113                 if (pPwrList[idxL] == pPwrList[idxR])
 114                         k = pVpdList[idxL];
 115                 else
 116                         k = (u16)(((currPwr - pPwrList[idxL]) * pVpdList[idxR] +
 117                                    (pPwrList[idxR] - currPwr) * pVpdList[idxL]) /
 118                                   (pPwrList[idxR] - pPwrList[idxL]));
 119                 pRetVpdList[i] = (u8) k;
 120                 currPwr += 2;
 121         }
 122 }
 123
 124 void ath9k_hw_get_legacy_target_powers(struct ath_hw *ah,
 125                                        struct ath9k_channel *chan,
 126                                        struct cal_target_power_leg *powInfo,
 127                                        u16 numChannels,
 128                                        struct cal_target_power_leg *pNewPower,
 129                                        u16 numRates, bool isExtTarget)
 130 {
 131         struct chan_centers centers;
 132         u16 clo, chi;
 133         int i;
 134         int matchIndex = -1, lowIndex = -1;
 135         u16 freq;
 136
 137         ath9k_hw_get_channel_centers(ah, chan, &centers);
 138         freq = (isExtTarget) ? centers.ext_center : centers.ctl_center;
 139
 140         if (freq <= ath9k_hw_fbin2freq(powInfo[0].bChannel,
 141                                        IS_CHAN_2GHZ(chan))) {
 142                 matchIndex = 0;
 143         } else {
 144                 for (i = 0; (i < numChannels) &&
 145                              (powInfo[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 146                         if (freq == ath9k_hw_fbin2freq(powInfo[i].bChannel,
 147                                                        IS_CHAN_2GHZ(chan))) {
 148                                 matchIndex = i;
 149                                 break;
 150                         } else if (freq < ath9k_hw_fbin2freq(powInfo[i].bChannel,
 151                                                 IS_CHAN_2GHZ(chan)) && i > 0 &&
 152                                    freq > ath9k_hw_fbin2freq(powInfo[i - 1].bChannel,
 153                                                 IS_CHAN_2GHZ(chan))) {
 154                                 lowIndex = i - 1;
 155                                 break;
 156                         }
 157                 }
 158                 if ((matchIndex == -1) && (lowIndex == -1))
 159                         matchIndex = i - 1;
 160         }
 161
 162         if (matchIndex != -1) {
 163                 *pNewPower = powInfo[matchIndex];
 164         } else {
 165                 clo = ath9k_hw_fbin2freq(powInfo[lowIndex].bChannel,
 166                                          IS_CHAN_2GHZ(chan));
 167                 chi = ath9k_hw_fbin2freq(powInfo[lowIndex + 1].bChannel,
 168                                          IS_CHAN_2GHZ(chan));
 169
 170                 for (i = 0; i < numRates; i++) {
 171                         pNewPower->tPow2x[i] =
 172                                 (u8)ath9k_hw_interpolate(freq, clo, chi,
 173                                                 powInfo[lowIndex].tPow2x[i],
 174                                                 powInfo[lowIndex + 1].tPow2x[i]);
 175                 }
 176         }
 177 }
 178
 179 void ath9k_hw_get_target_powers(struct ath_hw *ah,
 180                                 struct ath9k_channel *chan,
 181                                 struct cal_target_power_ht *powInfo,
 182                                 u16 numChannels,
 183                                 struct cal_target_power_ht *pNewPower,
 184                                 u16 numRates, bool isHt40Target)
 185 {
 186         struct chan_centers centers;
 187         u16 clo, chi;
 188         int i;
 189         int matchIndex = -1, lowIndex = -1;
 190         u16 freq;
 191
 192         ath9k_hw_get_channel_centers(ah, chan, &centers);
 193         freq = isHt40Target ? centers.synth_center : centers.ctl_center;
 194
 195         if (freq <= ath9k_hw_fbin2freq(powInfo[0].bChannel, IS_CHAN_2GHZ(chan))) {
 196                 matchIndex = 0;
 197         } else {
 198                 for (i = 0; (i < numChannels) &&
 199                              (powInfo[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 200                         if (freq == ath9k_hw_fbin2freq(powInfo[i].bChannel,
 201                                                        IS_CHAN_2GHZ(chan))) {
 202                                 matchIndex = i;
 203                                 break;
 204                         } else
 205                                 if (freq < ath9k_hw_fbin2freq(powInfo[i].bChannel,
 206                                                 IS_CHAN_2GHZ(chan)) && i > 0 &&
 207                                     freq > ath9k_hw_fbin2freq(powInfo[i - 1].bChannel,
 208                                                 IS_CHAN_2GHZ(chan))) {
 209                                         lowIndex = i - 1;
 210                                         break;
 211                                 }
 212                 }
 213                 if ((matchIndex == -1) && (lowIndex == -1))
 214                         matchIndex = i - 1;
 215         }
 216
 217         if (matchIndex != -1) {
 218                 *pNewPower = powInfo[matchIndex];
 219         } else {
 220                 clo = ath9k_hw_fbin2freq(powInfo[lowIndex].bChannel,
 221                                          IS_CHAN_2GHZ(chan));
 222                 chi = ath9k_hw_fbin2freq(powInfo[lowIndex + 1].bChannel,
 223                                          IS_CHAN_2GHZ(chan));
 224
 225                 for (i = 0; i < numRates; i++) {
 226                         pNewPower->tPow2x[i] = (u8)ath9k_hw_interpolate(freq,
 227                                                 clo, chi,
 228                                                 powInfo[lowIndex].tPow2x[i],
 229                                                 powInfo[lowIndex + 1].tPow2x[i]);
 230                 }
 231         }
 232 }
 233
 234 u16 ath9k_hw_get_max_edge_power(u16 freq, struct cal_ctl_edges *pRdEdgesPower,
 235                                 bool is2GHz, int num_band_edges)
 236 {
 237         u16 twiceMaxEdgePower = AR5416_MAX_RATE_POWER;
 238         int i;
 239
 240         for (i = 0; (i < num_band_edges) &&
 241                      (pRdEdgesPower[i].bChannel != AR5416_BCHAN_UNUSED); i++) {
 242                 if (freq == ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel, is2GHz)) {
 243                         twiceMaxEdgePower = pRdEdgesPower[i].tPower;
 244                         break;
 245                 } else if ((i > 0) &&
 246                            (freq < ath9k_hw_fbin2freq(pRdEdgesPower[i].bChannel,
 247                                                       is2GHz))) {
 248                         if (ath9k_hw_fbin2freq(pRdEdgesPower[i - 1].bChannel,
 249                                                is2GHz) < freq &&
 250                             pRdEdgesPower[i - 1].flag) {
 251                                 twiceMaxEdgePower =
 252                                         pRdEdgesPower[i - 1].tPower;
 253                         }
 254                         break;
 255                 }
 256         }
 257
 258         return twiceMaxEdgePower;
 259 }
 260
 261 void ath9k_hw_update_regulatory_maxpower(struct ath_hw *ah)
 262 {
 263         struct ath_common *common = ath9k_hw_common(ah);
 264         struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
 265
 266         switch (ar5416_get_ntxchains(ah->txchainmask)) {
 267         case 1:
 268                 break;
 269         case 2:
 270                 regulatory->max_power_level += INCREASE_MAXPOW_BY_TWO_CHAIN;
 271                 break;
 272         case 3:
 273                 regulatory->max_power_level += INCREASE_MAXPOW_BY_THREE_CHAIN;
 274                 break;
 275         default:
 276                 ath_print(common, ATH_DBG_EEPROM,
 277                           "Invalid chainmask configuration\n");
 278                 break;
 279         }
 280 }
 281
 282 int ath9k_hw_eeprom_init(struct ath_hw *ah)
 283 {
 284         int status;
 285
 286         if (AR_SREV_9300_20_OR_LATER(ah))
 287                 ah->eep_ops = &eep_ar9300_ops;
 288         else if (AR_SREV_9287(ah)) {
 289                 ah->eep_ops = &eep_ar9287_ops;
 290         } else if (AR_SREV_9285(ah) || AR_SREV_9271(ah)) {
 291                 ah->eep_ops = &eep_4k_ops;
 292         } else {
 293                 ah->eep_ops = &eep_def_ops;
 294         }
 295
 296         if (!ah->eep_ops->fill_eeprom(ah))
 297                 return -EIO;
 298
 299         status = ah->eep_ops->check_eeprom(ah);
 300
 301         return status;
 302 }