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
ar9002_hw_rx_enable(struct ath_hw * ah)22 static void ar9002_hw_rx_enable(struct ath_hw *ah)
23 {
24 REG_WRITE(ah, AR_CR, AR_CR_RXE);
25 }
26
ar9002_hw_set_desc_link(void * ds,u32 ds_link)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
ar9002_hw_get_isr(struct ath_hw * ah,enum ath9k_int * masked)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
ar9002_set_txdesc(struct ath_hw * ah,void * ds,struct ath_tx_info * i)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
ar9002_hw_proc_txdesc(struct ath_hw * ah,void * ds,struct ath_tx_status * ts)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
ath9k_hw_setuprxdesc(struct ath_hw * ah,struct ath_desc * ds,u32 size,u32 flags)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
ar9002_hw_attach_mac_ops(struct ath_hw * ah)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 }
370