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 u32 *sync_cause_p) 34 { 35 u32 isr = 0; 36 u32 mask2 = 0; 37 struct ath9k_hw_capabilities *pCap = &ah->caps; 38 u32 sync_cause = 0; 39 bool fatal_int = false; 40 struct ath_common *common = ath9k_hw_common(ah); 41 42 if (!AR_SREV_9100(ah)) { 43 if (REG_READ(ah, AR_INTR_ASYNC_CAUSE) & AR_INTR_MAC_IRQ) { 44 if ((REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M) 45 == AR_RTC_STATUS_ON) { 46 isr = REG_READ(ah, AR_ISR); 47 } 48 } 49 50 sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE) & 51 AR_INTR_SYNC_DEFAULT; 52 53 *masked = 0; 54 55 if (!isr && !sync_cause) 56 return false; 57 } else { 58 *masked = 0; 59 isr = REG_READ(ah, AR_ISR); 60 } 61 62 if (isr) { 63 if (isr & AR_ISR_BCNMISC) { 64 u32 isr2; 65 isr2 = REG_READ(ah, AR_ISR_S2); 66 if (isr2 & AR_ISR_S2_TIM) 67 mask2 |= ATH9K_INT_TIM; 68 if (isr2 & AR_ISR_S2_DTIM) 69 mask2 |= ATH9K_INT_DTIM; 70 if (isr2 & AR_ISR_S2_DTIMSYNC) 71 mask2 |= ATH9K_INT_DTIMSYNC; 72 if (isr2 & (AR_ISR_S2_CABEND)) 73 mask2 |= ATH9K_INT_CABEND; 74 if (isr2 & AR_ISR_S2_GTT) 75 mask2 |= ATH9K_INT_GTT; 76 if (isr2 & AR_ISR_S2_CST) 77 mask2 |= ATH9K_INT_CST; 78 if (isr2 & AR_ISR_S2_TSFOOR) 79 mask2 |= ATH9K_INT_TSFOOR; 80 81 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) { 82 REG_WRITE(ah, AR_ISR_S2, isr2); 83 isr &= ~AR_ISR_BCNMISC; 84 } 85 } 86 87 if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED) 88 isr = REG_READ(ah, AR_ISR_RAC); 89 90 if (isr == 0xffffffff) { 91 *masked = 0; 92 return false; 93 } 94 95 *masked = isr & ATH9K_INT_COMMON; 96 97 if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM | 98 AR_ISR_RXOK | AR_ISR_RXERR)) 99 *masked |= ATH9K_INT_RX; 100 101 if (isr & 102 (AR_ISR_TXOK | AR_ISR_TXDESC | AR_ISR_TXERR | 103 AR_ISR_TXEOL)) { 104 u32 s0_s, s1_s; 105 106 *masked |= ATH9K_INT_TX; 107 108 if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED) { 109 s0_s = REG_READ(ah, AR_ISR_S0_S); 110 s1_s = REG_READ(ah, AR_ISR_S1_S); 111 } else { 112 s0_s = REG_READ(ah, AR_ISR_S0); 113 REG_WRITE(ah, AR_ISR_S0, s0_s); 114 s1_s = REG_READ(ah, AR_ISR_S1); 115 REG_WRITE(ah, AR_ISR_S1, s1_s); 116 117 isr &= ~(AR_ISR_TXOK | 118 AR_ISR_TXDESC | 119 AR_ISR_TXERR | 120 AR_ISR_TXEOL); 121 } 122 123 ah->intr_txqs = MS(s0_s, AR_ISR_S0_QCU_TXOK); 124 ah->intr_txqs |= MS(s0_s, AR_ISR_S0_QCU_TXDESC); 125 ah->intr_txqs |= MS(s1_s, AR_ISR_S1_QCU_TXERR); 126 ah->intr_txqs |= MS(s1_s, AR_ISR_S1_QCU_TXEOL); 127 } 128 129 if (isr & AR_ISR_RXORN) { 130 ath_dbg(common, INTERRUPT, 131 "receive FIFO overrun interrupt\n"); 132 } 133 134 *masked |= mask2; 135 } 136 137 if (!AR_SREV_9100(ah) && (isr & AR_ISR_GENTMR)) { 138 u32 s5_s; 139 140 if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED) { 141 s5_s = REG_READ(ah, AR_ISR_S5_S); 142 } else { 143 s5_s = REG_READ(ah, AR_ISR_S5); 144 } 145 146 ah->intr_gen_timer_trigger = 147 MS(s5_s, AR_ISR_S5_GENTIMER_TRIG); 148 149 ah->intr_gen_timer_thresh = 150 MS(s5_s, AR_ISR_S5_GENTIMER_THRESH); 151 152 if (ah->intr_gen_timer_trigger) 153 *masked |= ATH9K_INT_GENTIMER; 154 155 if ((s5_s & AR_ISR_S5_TIM_TIMER) && 156 !(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) 157 *masked |= ATH9K_INT_TIM_TIMER; 158 159 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) { 160 REG_WRITE(ah, AR_ISR_S5, s5_s); 161 isr &= ~AR_ISR_GENTMR; 162 } 163 } 164 165 if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) { 166 REG_WRITE(ah, AR_ISR, isr); 167 REG_READ(ah, AR_ISR); 168 } 169 170 if (AR_SREV_9100(ah)) 171 return true; 172 173 if (sync_cause) { 174 if (sync_cause_p) 175 *sync_cause_p = sync_cause; 176 fatal_int = 177 (sync_cause & 178 (AR_INTR_SYNC_HOST1_FATAL | AR_INTR_SYNC_HOST1_PERR)) 179 ? true : false; 180 181 if (fatal_int) { 182 if (sync_cause & AR_INTR_SYNC_HOST1_FATAL) { 183 ath_dbg(common, ANY, 184 "received PCI FATAL interrupt\n"); 185 } 186 if (sync_cause & AR_INTR_SYNC_HOST1_PERR) { 187 ath_dbg(common, ANY, 188 "received PCI PERR interrupt\n"); 189 } 190 *masked |= ATH9K_INT_FATAL; 191 } 192 if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) { 193 ath_dbg(common, INTERRUPT, 194 "AR_INTR_SYNC_RADM_CPL_TIMEOUT\n"); 195 REG_WRITE(ah, AR_RC, AR_RC_HOSTIF); 196 REG_WRITE(ah, AR_RC, 0); 197 *masked |= ATH9K_INT_FATAL; 198 } 199 if (sync_cause & AR_INTR_SYNC_LOCAL_TIMEOUT) { 200 ath_dbg(common, INTERRUPT, 201 "AR_INTR_SYNC_LOCAL_TIMEOUT\n"); 202 } 203 204 REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause); 205 (void) REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR); 206 } 207 208 return true; 209 } 210 211 static void 212 ar9002_set_txdesc(struct ath_hw *ah, void *ds, struct ath_tx_info *i) 213 { 214 struct ar5416_desc *ads = AR5416DESC(ds); 215 u32 ctl1, ctl6; 216 217 ads->ds_txstatus0 = ads->ds_txstatus1 = 0; 218 ads->ds_txstatus2 = ads->ds_txstatus3 = 0; 219 ads->ds_txstatus4 = ads->ds_txstatus5 = 0; 220 ads->ds_txstatus6 = ads->ds_txstatus7 = 0; 221 ads->ds_txstatus8 = ads->ds_txstatus9 = 0; 222 223 WRITE_ONCE(ads->ds_link, i->link); 224 WRITE_ONCE(ads->ds_data, i->buf_addr[0]); 225 226 ctl1 = i->buf_len[0] | (i->is_last ? 0 : AR_TxMore); 227 ctl6 = SM(i->keytype, AR_EncrType); 228 229 if (AR_SREV_9285(ah)) { 230 ads->ds_ctl8 = 0; 231 ads->ds_ctl9 = 0; 232 ads->ds_ctl10 = 0; 233 ads->ds_ctl11 = 0; 234 } 235 236 if ((i->is_first || i->is_last) && 237 i->aggr != AGGR_BUF_MIDDLE && i->aggr != AGGR_BUF_LAST) { 238 WRITE_ONCE(ads->ds_ctl2, set11nTries(i->rates, 0) 239 | set11nTries(i->rates, 1) 240 | set11nTries(i->rates, 2) 241 | set11nTries(i->rates, 3) 242 | (i->dur_update ? AR_DurUpdateEna : 0) 243 | SM(0, AR_BurstDur)); 244 245 WRITE_ONCE(ads->ds_ctl3, set11nRate(i->rates, 0) 246 | set11nRate(i->rates, 1) 247 | set11nRate(i->rates, 2) 248 | set11nRate(i->rates, 3)); 249 } else { 250 WRITE_ONCE(ads->ds_ctl2, 0); 251 WRITE_ONCE(ads->ds_ctl3, 0); 252 } 253 254 if (!i->is_first) { 255 WRITE_ONCE(ads->ds_ctl0, 0); 256 WRITE_ONCE(ads->ds_ctl1, ctl1); 257 WRITE_ONCE(ads->ds_ctl6, ctl6); 258 return; 259 } 260 261 ctl1 |= (i->keyix != ATH9K_TXKEYIX_INVALID ? SM(i->keyix, AR_DestIdx) : 0) 262 | SM(i->type, AR_FrameType) 263 | (i->flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0) 264 | (i->flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0) 265 | (i->flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0); 266 267 switch (i->aggr) { 268 case AGGR_BUF_FIRST: 269 ctl6 |= SM(i->aggr_len, AR_AggrLen); 270 fallthrough; 271 case AGGR_BUF_MIDDLE: 272 ctl1 |= AR_IsAggr | AR_MoreAggr; 273 ctl6 |= SM(i->ndelim, AR_PadDelim); 274 break; 275 case AGGR_BUF_LAST: 276 ctl1 |= AR_IsAggr; 277 break; 278 case AGGR_BUF_NONE: 279 break; 280 } 281 282 WRITE_ONCE(ads->ds_ctl0, (i->pkt_len & AR_FrameLen) 283 | (i->flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0) 284 | SM(i->txpower[0], AR_XmitPower0) 285 | (i->flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0) 286 | (i->flags & ATH9K_TXDESC_INTREQ ? AR_TxIntrReq : 0) 287 | (i->keyix != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0) 288 | (i->flags & ATH9K_TXDESC_CLRDMASK ? AR_ClrDestMask : 0) 289 | (i->flags & ATH9K_TXDESC_RTSENA ? AR_RTSEnable : 290 (i->flags & ATH9K_TXDESC_CTSENA ? AR_CTSEnable : 0))); 291 292 WRITE_ONCE(ads->ds_ctl1, ctl1); 293 WRITE_ONCE(ads->ds_ctl6, ctl6); 294 295 if (i->aggr == AGGR_BUF_MIDDLE || i->aggr == AGGR_BUF_LAST) 296 return; 297 298 WRITE_ONCE(ads->ds_ctl4, set11nPktDurRTSCTS(i->rates, 0) 299 | set11nPktDurRTSCTS(i->rates, 1)); 300 301 WRITE_ONCE(ads->ds_ctl5, set11nPktDurRTSCTS(i->rates, 2) 302 | set11nPktDurRTSCTS(i->rates, 3)); 303 304 WRITE_ONCE(ads->ds_ctl7, 305 set11nRateFlags(i->rates, 0) | set11nChainSel(i->rates, 0) 306 | set11nRateFlags(i->rates, 1) | set11nChainSel(i->rates, 1) 307 | set11nRateFlags(i->rates, 2) | set11nChainSel(i->rates, 2) 308 | set11nRateFlags(i->rates, 3) | set11nChainSel(i->rates, 3) 309 | SM(i->rtscts_rate, AR_RTSCTSRate)); 310 311 WRITE_ONCE(ads->ds_ctl9, SM(i->txpower[1], AR_XmitPower1)); 312 WRITE_ONCE(ads->ds_ctl10, SM(i->txpower[2], AR_XmitPower2)); 313 WRITE_ONCE(ads->ds_ctl11, SM(i->txpower[3], AR_XmitPower3)); 314 } 315 316 static int ar9002_hw_proc_txdesc(struct ath_hw *ah, void *ds, 317 struct ath_tx_status *ts) 318 { 319 struct ar5416_desc *ads = AR5416DESC(ds); 320 u32 status; 321 322 status = READ_ONCE(ads->ds_txstatus9); 323 if ((status & AR_TxDone) == 0) 324 return -EINPROGRESS; 325 326 ts->ts_tstamp = ads->AR_SendTimestamp; 327 ts->ts_status = 0; 328 ts->ts_flags = 0; 329 330 if (status & AR_TxOpExceeded) 331 ts->ts_status |= ATH9K_TXERR_XTXOP; 332 ts->tid = MS(status, AR_TxTid); 333 ts->ts_rateindex = MS(status, AR_FinalTxIdx); 334 ts->ts_seqnum = MS(status, AR_SeqNum); 335 336 status = READ_ONCE(ads->ds_txstatus0); 337 ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00); 338 ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01); 339 ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02); 340 if (status & AR_TxBaStatus) { 341 ts->ts_flags |= ATH9K_TX_BA; 342 ts->ba_low = ads->AR_BaBitmapLow; 343 ts->ba_high = ads->AR_BaBitmapHigh; 344 } 345 346 status = READ_ONCE(ads->ds_txstatus1); 347 if (status & AR_FrmXmitOK) 348 ts->ts_status |= ATH9K_TX_ACKED; 349 else { 350 if (status & AR_ExcessiveRetries) 351 ts->ts_status |= ATH9K_TXERR_XRETRY; 352 if (status & AR_Filtered) 353 ts->ts_status |= ATH9K_TXERR_FILT; 354 if (status & AR_FIFOUnderrun) { 355 ts->ts_status |= ATH9K_TXERR_FIFO; 356 ath9k_hw_updatetxtriglevel(ah, true); 357 } 358 } 359 if (status & AR_TxTimerExpired) 360 ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED; 361 if (status & AR_DescCfgErr) 362 ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR; 363 if (status & AR_TxDataUnderrun) { 364 ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN; 365 ath9k_hw_updatetxtriglevel(ah, true); 366 } 367 if (status & AR_TxDelimUnderrun) { 368 ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN; 369 ath9k_hw_updatetxtriglevel(ah, true); 370 } 371 ts->ts_shortretry = MS(status, AR_RTSFailCnt); 372 ts->ts_longretry = MS(status, AR_DataFailCnt); 373 ts->ts_virtcol = MS(status, AR_VirtRetryCnt); 374 375 status = READ_ONCE(ads->ds_txstatus5); 376 ts->ts_rssi = MS(status, AR_TxRSSICombined); 377 ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10); 378 ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11); 379 ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12); 380 381 ts->evm0 = ads->AR_TxEVM0; 382 ts->evm1 = ads->AR_TxEVM1; 383 ts->evm2 = ads->AR_TxEVM2; 384 385 return 0; 386 } 387 388 static int ar9002_hw_get_duration(struct ath_hw *ah, const void *ds, int index) 389 { 390 struct ar5416_desc *ads = AR5416DESC(ds); 391 392 switch (index) { 393 case 0: 394 return MS(READ_ONCE(ads->ds_ctl4), AR_PacketDur0); 395 case 1: 396 return MS(READ_ONCE(ads->ds_ctl4), AR_PacketDur1); 397 case 2: 398 return MS(READ_ONCE(ads->ds_ctl5), AR_PacketDur2); 399 case 3: 400 return MS(READ_ONCE(ads->ds_ctl5), AR_PacketDur3); 401 default: 402 return -1; 403 } 404 } 405 406 void ath9k_hw_setuprxdesc(struct ath_hw *ah, struct ath_desc *ds, 407 u32 size, u32 flags) 408 { 409 struct ar5416_desc *ads = AR5416DESC(ds); 410 411 ads->ds_ctl1 = size & AR_BufLen; 412 if (flags & ATH9K_RXDESC_INTREQ) 413 ads->ds_ctl1 |= AR_RxIntrReq; 414 415 memset(&ads->u.rx, 0, sizeof(ads->u.rx)); 416 } 417 EXPORT_SYMBOL(ath9k_hw_setuprxdesc); 418 419 void ar9002_hw_attach_mac_ops(struct ath_hw *ah) 420 { 421 struct ath_hw_ops *ops = ath9k_hw_ops(ah); 422 423 ops->rx_enable = ar9002_hw_rx_enable; 424 ops->set_desc_link = ar9002_hw_set_desc_link; 425 ops->get_isr = ar9002_hw_get_isr; 426 ops->set_txdesc = ar9002_set_txdesc; 427 ops->proc_txdesc = ar9002_hw_proc_txdesc; 428 ops->get_duration = ar9002_hw_get_duration; 429 } 430