drivers/net/wireless/ath/ath9k/ar9002_mac.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 "hw.h"
  18 #include <linux/export.h>
  19
  20 #define AR_BufLen           0x00000fff
  21
  22 static void ar9002_hw_rx_enable(struct ath_hw *ah)
  23 {
  24         REG_WRITE(ah, AR_CR, AR_CR_RXE);
  25 }
  26
  27 static void ar9002_hw_set_desc_link(void *ds, u32 ds_link)
  28 {
  29         ((struct ath_desc*) ds)->ds_link = ds_link;
  30 }
  31
  32 static bool ar9002_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
  33 {
  34         u32 isr = 0;
  35         u32 mask2 = 0;
  36         struct ath9k_hw_capabilities *pCap = &ah->caps;
  37         u32 sync_cause = 0;
  38         bool fatal_int = false;
  39         struct ath_common *common = ath9k_hw_common(ah);
  40
  41         if (!AR_SREV_9100(ah)) {
  42                 if (REG_READ(ah, AR_INTR_ASYNC_CAUSE) & AR_INTR_MAC_IRQ) {
  43                         if ((REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M)
  44                             == AR_RTC_STATUS_ON) {
  45                                 isr = REG_READ(ah, AR_ISR);
  46                         }
  47                 }
  48
  49                 sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE) &
  50                         AR_INTR_SYNC_DEFAULT;
  51
  52                 *masked = 0;
  53
  54                 if (!isr && !sync_cause)
  55                         return false;
  56         } else {
  57                 *masked = 0;
  58                 isr = REG_READ(ah, AR_ISR);
  59         }
  60
  61         if (isr) {
  62                 if (isr & AR_ISR_BCNMISC) {
  63                         u32 isr2;
  64                         isr2 = REG_READ(ah, AR_ISR_S2);
  65                         if (isr2 & AR_ISR_S2_TIM)
  66                                 mask2 |= ATH9K_INT_TIM;
  67                         if (isr2 & AR_ISR_S2_DTIM)
  68                                 mask2 |= ATH9K_INT_DTIM;
  69                         if (isr2 & AR_ISR_S2_DTIMSYNC)
  70                                 mask2 |= ATH9K_INT_DTIMSYNC;
  71                         if (isr2 & (AR_ISR_S2_CABEND))
  72                                 mask2 |= ATH9K_INT_CABEND;
  73                         if (isr2 & AR_ISR_S2_GTT)
  74                                 mask2 |= ATH9K_INT_GTT;
  75                         if (isr2 & AR_ISR_S2_CST)
  76                                 mask2 |= ATH9K_INT_CST;
  77                         if (isr2 & AR_ISR_S2_TSFOOR)
  78                                 mask2 |= ATH9K_INT_TSFOOR;
  79                 }
  80
  81                 isr = REG_READ(ah, AR_ISR_RAC);
  82                 if (isr == 0xffffffff) {
  83                         *masked = 0;
  84                         return false;
  85                 }
  86
  87                 *masked = isr & ATH9K_INT_COMMON;
  88
  89                 if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM |
  90                            AR_ISR_RXOK | AR_ISR_RXERR))
  91                         *masked |= ATH9K_INT_RX;
  92
  93                 if (isr &
  94                     (AR_ISR_TXOK | AR_ISR_TXDESC | AR_ISR_TXERR |
  95                      AR_ISR_TXEOL)) {
  96                         u32 s0_s, s1_s;
  97
  98                         *masked |= ATH9K_INT_TX;
  99
 100                         s0_s = REG_READ(ah, AR_ISR_S0_S);
 101                         ah->intr_txqs |= MS(s0_s, AR_ISR_S0_QCU_TXOK);
 102                         ah->intr_txqs |= MS(s0_s, AR_ISR_S0_QCU_TXDESC);
 103
 104                         s1_s = REG_READ(ah, AR_ISR_S1_S);
 105                         ah->intr_txqs |= MS(s1_s, AR_ISR_S1_QCU_TXERR);
 106                         ah->intr_txqs |= MS(s1_s, AR_ISR_S1_QCU_TXEOL);
 107                 }
 108
 109                 if (isr & AR_ISR_RXORN) {
 110                         ath_dbg(common, INTERRUPT,
 111                                 "receive FIFO overrun interrupt\n");
 112                 }
 113
 114                 *masked |= mask2;
 115         }
 116
 117         if (AR_SREV_9100(ah))
 118                 return true;
 119
 120         if (isr & AR_ISR_GENTMR) {
 121                 u32 s5_s;
 122
 123                 s5_s = REG_READ(ah, AR_ISR_S5_S);
 124                 ah->intr_gen_timer_trigger =
 125                                 MS(s5_s, AR_ISR_S5_GENTIMER_TRIG);
 126
 127                 ah->intr_gen_timer_thresh =
 128                         MS(s5_s, AR_ISR_S5_GENTIMER_THRESH);
 129
 130                 if (ah->intr_gen_timer_trigger)
 131                         *masked |= ATH9K_INT_GENTIMER;
 132
 133                 if ((s5_s & AR_ISR_S5_TIM_TIMER) &&
 134                     !(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 135                         *masked |= ATH9K_INT_TIM_TIMER;
 136         }
 137
 138         if (sync_cause) {
 139                 ath9k_debug_sync_cause(common, sync_cause);
 140                 fatal_int =
 141                         (sync_cause &
 142                          (AR_INTR_SYNC_HOST1_FATAL | AR_INTR_SYNC_HOST1_PERR))
 143                         ? true : false;
 144
 145                 if (fatal_int) {
 146                         if (sync_cause & AR_INTR_SYNC_HOST1_FATAL) {
 147                                 ath_dbg(common, ANY,
 148                                         "received PCI FATAL interrupt\n");
 149                         }
 150                         if (sync_cause & AR_INTR_SYNC_HOST1_PERR) {
 151                                 ath_dbg(common, ANY,
 152                                         "received PCI PERR interrupt\n");
 153                         }
 154                         *masked |= ATH9K_INT_FATAL;
 155                 }
 156                 if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
 157                         ath_dbg(common, INTERRUPT,
 158                                 "AR_INTR_SYNC_RADM_CPL_TIMEOUT\n");
 159                         REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);
 160                         REG_WRITE(ah, AR_RC, 0);
 161                         *masked |= ATH9K_INT_FATAL;
 162                 }
 163                 if (sync_cause & AR_INTR_SYNC_LOCAL_TIMEOUT) {
 164                         ath_dbg(common, INTERRUPT,
 165                                 "AR_INTR_SYNC_LOCAL_TIMEOUT\n");
 166                 }
 167
 168                 REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause);
 169                 (void) REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR);
 170         }
 171
 172         return true;
 173 }
 174
 175 static void
 176 ar9002_set_txdesc(struct ath_hw *ah, void *ds, struct ath_tx_info *i)
 177 {
 178         struct ar5416_desc *ads = AR5416DESC(ds);
 179         u32 ctl1, ctl6;
 180
 181         ads->ds_txstatus0 = ads->ds_txstatus1 = 0;
 182         ads->ds_txstatus2 = ads->ds_txstatus3 = 0;
 183         ads->ds_txstatus4 = ads->ds_txstatus5 = 0;
 184         ads->ds_txstatus6 = ads->ds_txstatus7 = 0;
 185         ads->ds_txstatus8 = ads->ds_txstatus9 = 0;
 186
 187         ACCESS_ONCE(ads->ds_link) = i->link;
 188         ACCESS_ONCE(ads->ds_data) = i->buf_addr[0];
 189
 190         ctl1 = i->buf_len[0] | (i->is_last ? 0 : AR_TxMore);
 191         ctl6 = SM(i->keytype, AR_EncrType);
 192
 193         if (AR_SREV_9285(ah)) {
 194                 ads->ds_ctl8 = 0;
 195                 ads->ds_ctl9 = 0;
 196                 ads->ds_ctl10 = 0;
 197                 ads->ds_ctl11 = 0;
 198         }
 199
 200         if ((i->is_first || i->is_last) &&
 201             i->aggr != AGGR_BUF_MIDDLE && i->aggr != AGGR_BUF_LAST) {
 202                 ACCESS_ONCE(ads->ds_ctl2) = set11nTries(i->rates, 0)
 203                         | set11nTries(i->rates, 1)
 204                         | set11nTries(i->rates, 2)
 205                         | set11nTries(i->rates, 3)
 206                         | (i->dur_update ? AR_DurUpdateEna : 0)
 207                         | SM(0, AR_BurstDur);
 208
 209                 ACCESS_ONCE(ads->ds_ctl3) = set11nRate(i->rates, 0)
 210                         | set11nRate(i->rates, 1)
 211                         | set11nRate(i->rates, 2)
 212                         | set11nRate(i->rates, 3);
 213         } else {
 214                 ACCESS_ONCE(ads->ds_ctl2) = 0;
 215                 ACCESS_ONCE(ads->ds_ctl3) = 0;
 216         }
 217
 218         if (!i->is_first) {
 219                 ACCESS_ONCE(ads->ds_ctl0) = 0;
 220                 ACCESS_ONCE(ads->ds_ctl1) = ctl1;
 221                 ACCESS_ONCE(ads->ds_ctl6) = ctl6;
 222                 return;
 223         }
 224
 225         ctl1 |= (i->keyix != ATH9K_TXKEYIX_INVALID ? SM(i->keyix, AR_DestIdx) : 0)
 226                 | SM(i->type, AR_FrameType)
 227                 | (i->flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0)
 228                 | (i->flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0)
 229                 | (i->flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0);
 230
 231         switch (i->aggr) {
 232         case AGGR_BUF_FIRST:
 233                 ctl6 |= SM(i->aggr_len, AR_AggrLen);
 234                 /* fall through */
 235         case AGGR_BUF_MIDDLE:
 236                 ctl1 |= AR_IsAggr | AR_MoreAggr;
 237                 ctl6 |= SM(i->ndelim, AR_PadDelim);
 238                 break;
 239         case AGGR_BUF_LAST:
 240                 ctl1 |= AR_IsAggr;
 241                 break;
 242         case AGGR_BUF_NONE:
 243                 break;
 244         }
 245
 246         ACCESS_ONCE(ads->ds_ctl0) = (i->pkt_len & AR_FrameLen)
 247                 | (i->flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
 248                 | SM(i->txpower, AR_XmitPower)
 249                 | (i->flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0)
 250                 | (i->flags & ATH9K_TXDESC_INTREQ ? AR_TxIntrReq : 0)
 251                 | (i->keyix != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
 252                 | (i->flags & ATH9K_TXDESC_CLRDMASK ? AR_ClrDestMask : 0)
 253                 | (i->flags & ATH9K_TXDESC_RTSENA ? AR_RTSEnable :
 254                    (i->flags & ATH9K_TXDESC_CTSENA ? AR_CTSEnable : 0));
 255
 256         ACCESS_ONCE(ads->ds_ctl1) = ctl1;
 257         ACCESS_ONCE(ads->ds_ctl6) = ctl6;
 258
 259         if (i->aggr == AGGR_BUF_MIDDLE || i->aggr == AGGR_BUF_LAST)
 260                 return;
 261
 262         ACCESS_ONCE(ads->ds_ctl4) = set11nPktDurRTSCTS(i->rates, 0)
 263                 | set11nPktDurRTSCTS(i->rates, 1);
 264
 265         ACCESS_ONCE(ads->ds_ctl5) = set11nPktDurRTSCTS(i->rates, 2)
 266                 | set11nPktDurRTSCTS(i->rates, 3);
 267
 268         ACCESS_ONCE(ads->ds_ctl7) = set11nRateFlags(i->rates, 0)
 269                 | set11nRateFlags(i->rates, 1)
 270                 | set11nRateFlags(i->rates, 2)
 271                 | set11nRateFlags(i->rates, 3)
 272                 | SM(i->rtscts_rate, AR_RTSCTSRate);
 273 }
 274
 275 static int ar9002_hw_proc_txdesc(struct ath_hw *ah, void *ds,
 276                                  struct ath_tx_status *ts)
 277 {
 278         struct ar5416_desc *ads = AR5416DESC(ds);
 279         u32 status;
 280
 281         status = ACCESS_ONCE(ads->ds_txstatus9);
 282         if ((status & AR_TxDone) == 0)
 283                 return -EINPROGRESS;
 284
 285         ts->ts_tstamp = ads->AR_SendTimestamp;
 286         ts->ts_status = 0;
 287         ts->ts_flags = 0;
 288
 289         if (status & AR_TxOpExceeded)
 290                 ts->ts_status |= ATH9K_TXERR_XTXOP;
 291         ts->tid = MS(status, AR_TxTid);
 292         ts->ts_rateindex = MS(status, AR_FinalTxIdx);
 293         ts->ts_seqnum = MS(status, AR_SeqNum);
 294
 295         status = ACCESS_ONCE(ads->ds_txstatus0);
 296         ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
 297         ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
 298         ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
 299         if (status & AR_TxBaStatus) {
 300                 ts->ts_flags |= ATH9K_TX_BA;
 301                 ts->ba_low = ads->AR_BaBitmapLow;
 302                 ts->ba_high = ads->AR_BaBitmapHigh;
 303         }
 304
 305         status = ACCESS_ONCE(ads->ds_txstatus1);
 306         if (status & AR_FrmXmitOK)
 307                 ts->ts_status |= ATH9K_TX_ACKED;
 308         else {
 309                 if (status & AR_ExcessiveRetries)
 310                         ts->ts_status |= ATH9K_TXERR_XRETRY;
 311                 if (status & AR_Filtered)
 312                         ts->ts_status |= ATH9K_TXERR_FILT;
 313                 if (status & AR_FIFOUnderrun) {
 314                         ts->ts_status |= ATH9K_TXERR_FIFO;
 315                         ath9k_hw_updatetxtriglevel(ah, true);
 316                 }
 317         }
 318         if (status & AR_TxTimerExpired)
 319                 ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
 320         if (status & AR_DescCfgErr)
 321                 ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
 322         if (status & AR_TxDataUnderrun) {
 323                 ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
 324                 ath9k_hw_updatetxtriglevel(ah, true);
 325         }
 326         if (status & AR_TxDelimUnderrun) {
 327                 ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
 328                 ath9k_hw_updatetxtriglevel(ah, true);
 329         }
 330         ts->ts_shortretry = MS(status, AR_RTSFailCnt);
 331         ts->ts_longretry = MS(status, AR_DataFailCnt);
 332         ts->ts_virtcol = MS(status, AR_VirtRetryCnt);
 333
 334         status = ACCESS_ONCE(ads->ds_txstatus5);
 335         ts->ts_rssi = MS(status, AR_TxRSSICombined);
 336         ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
 337         ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
 338         ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);
 339
 340         ts->evm0 = ads->AR_TxEVM0;
 341         ts->evm1 = ads->AR_TxEVM1;
 342         ts->evm2 = ads->AR_TxEVM2;
 343
 344         return 0;
 345 }
 346
 347 void ath9k_hw_setuprxdesc(struct ath_hw *ah, struct ath_desc *ds,
 348                           u32 size, u32 flags)
 349 {
 350         struct ar5416_desc *ads = AR5416DESC(ds);
 351
 352         ads->ds_ctl1 = size & AR_BufLen;
 353         if (flags & ATH9K_RXDESC_INTREQ)
 354                 ads->ds_ctl1 |= AR_RxIntrReq;
 355
 356         memset(&ads->u.rx, 0, sizeof(ads->u.rx));
 357 }
 358 EXPORT_SYMBOL(ath9k_hw_setuprxdesc);
 359
 360 void ar9002_hw_attach_mac_ops(struct ath_hw *ah)
 361 {
 362         struct ath_hw_ops *ops = ath9k_hw_ops(ah);
 363
 364         ops->rx_enable = ar9002_hw_rx_enable;
 365         ops->set_desc_link = ar9002_hw_set_desc_link;
 366         ops->get_isr = ar9002_hw_get_isr;
 367         ops->set_txdesc = ar9002_set_txdesc;
 368         ops->proc_txdesc = ar9002_hw_proc_txdesc;
 369 }