summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/intel/iwlegacy/4965.h
blob: 8ab8706f942267fcd2467928b1cbdf248a05921f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

#ifndef __il_4965_h__
#define __il_4965_h__

struct il_rx_queue;
struct il_rx_buf;
struct il_rx_pkt;
struct il_tx_queue;
struct il_rxon_context;

/* configuration for the _4965 devices */
extern struct il_cfg il4965_cfg;
extern const struct il_ops il4965_ops;

extern struct il_mod_params il4965_mod_params;

/* tx queue */
void il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid,
			       int freed);

/* RXON */
void il4965_set_rxon_chain(struct il_priv *il);

/* uCode */
int il4965_verify_ucode(struct il_priv *il);

/* lib */
void il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status);

void il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq);
int il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq);
int il4965_hw_nic_init(struct il_priv *il);
int il4965_dump_fh(struct il_priv *il, char **buf, bool display);

void il4965_nic_config(struct il_priv *il);

/* rx */
void il4965_rx_queue_restock(struct il_priv *il);
void il4965_rx_replenish(struct il_priv *il);
void il4965_rx_replenish_now(struct il_priv *il);
void il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq);
int il4965_rxq_stop(struct il_priv *il);
int il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band);
void il4965_rx_handle(struct il_priv *il);

/* tx */
void il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq);
int il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
				    dma_addr_t addr, u16 len, u8 reset, u8 pad);
int il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq);
void il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
				 struct ieee80211_tx_info *info);
int il4965_tx_skb(struct il_priv *il,
		  struct ieee80211_sta *sta,
		  struct sk_buff *skb);
int il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
			struct ieee80211_sta *sta, u16 tid, u16 * ssn);
int il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
		       struct ieee80211_sta *sta, u16 tid);
int il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id);
int il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx);
void il4965_hw_txq_ctx_free(struct il_priv *il);
int il4965_txq_ctx_alloc(struct il_priv *il);
void il4965_txq_ctx_reset(struct il_priv *il);
void il4965_txq_ctx_stop(struct il_priv *il);
void il4965_txq_set_sched(struct il_priv *il, u32 mask);

/*
 * Acquire il->lock before calling this function !
 */
void il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx);
/**
 * il4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
 * @scd_retry: (1) Indicates queue will be used in aggregation mode
 *
 * NOTE:  Acquire il->lock before calling this function !
 */
void il4965_tx_queue_set_status(struct il_priv *il, struct il_tx_queue *txq,
				int tx_fifo_id, int scd_retry);

/* scan */
int il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif);

/* station mgmt */
int il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
			       bool add);

/* hcmd */
int il4965_send_beacon_cmd(struct il_priv *il);

#ifdef CONFIG_IWLEGACY_DEBUG
const char *il4965_get_tx_fail_reason(u32 status);
#else
static inline const char *
il4965_get_tx_fail_reason(u32 status)
{
	return "";
}
#endif

/* station management */
int il4965_alloc_bcast_station(struct il_priv *il);
int il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r);
int il4965_remove_default_wep_key(struct il_priv *il,
				  struct ieee80211_key_conf *key);
int il4965_set_default_wep_key(struct il_priv *il,
			       struct ieee80211_key_conf *key);
int il4965_restore_default_wep_keys(struct il_priv *il);
int il4965_set_dynamic_key(struct il_priv *il,
			   struct ieee80211_key_conf *key, u8 sta_id);
int il4965_remove_dynamic_key(struct il_priv *il,
			      struct ieee80211_key_conf *key, u8 sta_id);
void il4965_update_tkip_key(struct il_priv *il,
			    struct ieee80211_key_conf *keyconf,
			    struct ieee80211_sta *sta, u32 iv32,
			    u16 *phase1key);
int il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid);
int il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta,
			    int tid, u16 ssn);
int il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta,
			   int tid);
void il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt);
int il4965_update_bcast_stations(struct il_priv *il);

/* rate */
static inline u8
il4965_hw_get_rate(__le32 rate_n_flags)
{
	return le32_to_cpu(rate_n_flags) & 0xFF;
}

/* eeprom */
void il4965_eeprom_get_mac(const struct il_priv *il, u8 * mac);
int il4965_eeprom_acquire_semaphore(struct il_priv *il);
void il4965_eeprom_release_semaphore(struct il_priv *il);
int il4965_eeprom_check_version(struct il_priv *il);

/* mac80211 handlers (for 4965) */
void il4965_mac_tx(struct ieee80211_hw *hw,
		   struct ieee80211_tx_control *control,
		   struct sk_buff *skb);
int il4965_mac_start(struct ieee80211_hw *hw);
void il4965_mac_stop(struct ieee80211_hw *hw);
void il4965_configure_filter(struct ieee80211_hw *hw,
			     unsigned int changed_flags,
			     unsigned int *total_flags, u64 multicast);
int il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
		       struct ieee80211_vif *vif, struct ieee80211_sta *sta,
		       struct ieee80211_key_conf *key);
void il4965_mac_update_tkip_key(struct ieee80211_hw *hw,
				struct ieee80211_vif *vif,
				struct ieee80211_key_conf *keyconf,
				struct ieee80211_sta *sta, u32 iv32,
				u16 *phase1key);
int il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			    enum ieee80211_ampdu_mlme_action action,
			    struct ieee80211_sta *sta, u16 tid, u16 * ssn,
			    u8 buf_size, bool amsdu);
int il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		       struct ieee80211_sta *sta);
void
il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			  struct ieee80211_channel_switch *ch_switch);

void il4965_led_enable(struct il_priv *il);

/* EEPROM */
#define IL4965_EEPROM_IMG_SIZE			1024

/*
 * uCode queue management definitions ...
 * The first queue used for block-ack aggregation is #7 (4965 only).
 * All block-ack aggregation queues should map to Tx DMA/FIFO channel 7.
 */
#define IL49_FIRST_AMPDU_QUEUE	7

/* Sizes and addresses for instruction and data memory (SRAM) in
 * 4965's embedded processor.  Driver access is via HBUS_TARG_MEM_* regs. */
#define IL49_RTC_INST_LOWER_BOUND		(0x000000)
#define IL49_RTC_INST_UPPER_BOUND		(0x018000)

#define IL49_RTC_DATA_LOWER_BOUND		(0x800000)
#define IL49_RTC_DATA_UPPER_BOUND		(0x80A000)

#define IL49_RTC_INST_SIZE  (IL49_RTC_INST_UPPER_BOUND - \
				IL49_RTC_INST_LOWER_BOUND)
#define IL49_RTC_DATA_SIZE  (IL49_RTC_DATA_UPPER_BOUND - \
				IL49_RTC_DATA_LOWER_BOUND)

#define IL49_MAX_INST_SIZE IL49_RTC_INST_SIZE
#define IL49_MAX_DATA_SIZE IL49_RTC_DATA_SIZE

/* Size of uCode instruction memory in bootstrap state machine */
#define IL49_MAX_BSM_SIZE BSM_SRAM_SIZE

static inline int
il4965_hw_valid_rtc_data_addr(u32 addr)
{
	return (addr >= IL49_RTC_DATA_LOWER_BOUND &&
		addr < IL49_RTC_DATA_UPPER_BOUND);
}

/********************* START TEMPERATURE *************************************/

/**
 * 4965 temperature calculation.
 *
 * The driver must calculate the device temperature before calculating
 * a txpower setting (amplifier gain is temperature dependent).  The
 * calculation uses 4 measurements, 3 of which (R1, R2, R3) are calibration
 * values used for the life of the driver, and one of which (R4) is the
 * real-time temperature indicator.
 *
 * uCode provides all 4 values to the driver via the "initialize alive"
 * notification (see struct il4965_init_alive_resp).  After the runtime uCode
 * image loads, uCode updates the R4 value via stats notifications
 * (see N_STATS), which occur after each received beacon
 * when associated, or can be requested via C_STATS.
 *
 * NOTE:  uCode provides the R4 value as a 23-bit signed value.  Driver
 *        must sign-extend to 32 bits before applying formula below.
 *
 * Formula:
 *
 * degrees Kelvin = ((97 * 259 * (R4 - R2) / (R3 - R1)) / 100) + 8
 *
 * NOTE:  The basic formula is 259 * (R4-R2) / (R3-R1).  The 97/100 is
 * an additional correction, which should be centered around 0 degrees
 * Celsius (273 degrees Kelvin).  The 8 (3 percent of 273) compensates for
 * centering the 97/100 correction around 0 degrees K.
 *
 * Add 273 to Kelvin value to find degrees Celsius, for comparing current
 * temperature with factory-measured temperatures when calculating txpower
 * settings.
 */
#define TEMPERATURE_CALIB_KELVIN_OFFSET 8
#define TEMPERATURE_CALIB_A_VAL 259

/* Limit range of calculated temperature to be between these Kelvin values */
#define IL_TX_POWER_TEMPERATURE_MIN  (263)
#define IL_TX_POWER_TEMPERATURE_MAX  (410)

#define IL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(t) \
	((t) < IL_TX_POWER_TEMPERATURE_MIN || \
	 (t) > IL_TX_POWER_TEMPERATURE_MAX)

void il4965_temperature_calib(struct il_priv *il);
/********************* END TEMPERATURE ***************************************/

/********************* START TXPOWER *****************************************/

/**
 * 4965 txpower calculations rely on information from three sources:
 *
 *     1) EEPROM
 *     2) "initialize" alive notification
 *     3) stats notifications
 *
 * EEPROM data consists of:
 *
 * 1)  Regulatory information (max txpower and channel usage flags) is provided
 *     separately for each channel that can possibly supported by 4965.
 *     40 MHz wide (.11n HT40) channels are listed separately from 20 MHz
 *     (legacy) channels.
 *
 *     See struct il4965_eeprom_channel for format, and struct il4965_eeprom
 *     for locations in EEPROM.
 *
 * 2)  Factory txpower calibration information is provided separately for
 *     sub-bands of contiguous channels.  2.4GHz has just one sub-band,
 *     but 5 GHz has several sub-bands.
 *
 *     In addition, per-band (2.4 and 5 Ghz) saturation txpowers are provided.
 *
 *     See struct il4965_eeprom_calib_info (and the tree of structures
 *     contained within it) for format, and struct il4965_eeprom for
 *     locations in EEPROM.
 *
 * "Initialization alive" notification (see struct il4965_init_alive_resp)
 * consists of:
 *
 * 1)  Temperature calculation parameters.
 *
 * 2)  Power supply voltage measurement.
 *
 * 3)  Tx gain compensation to balance 2 transmitters for MIMO use.
 *
 * Statistics notifications deliver:
 *
 * 1)  Current values for temperature param R4.
 */

/**
 * To calculate a txpower setting for a given desired target txpower, channel,
 * modulation bit rate, and transmitter chain (4965 has 2 transmitters to
 * support MIMO and transmit diversity), driver must do the following:
 *
 * 1)  Compare desired txpower vs. (EEPROM) regulatory limit for this channel.
 *     Do not exceed regulatory limit; reduce target txpower if necessary.
 *
 *     If setting up txpowers for MIMO rates (rate idxes 8-15, 24-31),
 *     2 transmitters will be used simultaneously; driver must reduce the
 *     regulatory limit by 3 dB (half-power) for each transmitter, so the
 *     combined total output of the 2 transmitters is within regulatory limits.
 *
 *
 * 2)  Compare target txpower vs. (EEPROM) saturation txpower *reduced by
 *     backoff for this bit rate*.  Do not exceed (saturation - backoff[rate]);
 *     reduce target txpower if necessary.
 *
 *     Backoff values below are in 1/2 dB units (equivalent to steps in
 *     txpower gain tables):
 *
 *     OFDM 6 - 36 MBit:  10 steps (5 dB)
 *     OFDM 48 MBit:      15 steps (7.5 dB)
 *     OFDM 54 MBit:      17 steps (8.5 dB)
 *     OFDM 60 MBit:      20 steps (10 dB)
 *     CCK all rates:     10 steps (5 dB)
 *
 *     Backoff values apply to saturation txpower on a per-transmitter basis;
 *     when using MIMO (2 transmitters), each transmitter uses the same
 *     saturation level provided in EEPROM, and the same backoff values;
 *     no reduction (such as with regulatory txpower limits) is required.
 *
 *     Saturation and Backoff values apply equally to 20 Mhz (legacy) channel
 *     widths and 40 Mhz (.11n HT40) channel widths; there is no separate
 *     factory measurement for ht40 channels.
 *
 *     The result of this step is the final target txpower.  The rest of
 *     the steps figure out the proper settings for the device to achieve
 *     that target txpower.
 *
 *
 * 3)  Determine (EEPROM) calibration sub band for the target channel, by
 *     comparing against first and last channels in each sub band
 *     (see struct il4965_eeprom_calib_subband_info).
 *
 *
 * 4)  Linearly interpolate (EEPROM) factory calibration measurement sets,
 *     referencing the 2 factory-measured (sample) channels within the sub band.
 *
 *     Interpolation is based on difference between target channel's frequency
 *     and the sample channels' frequencies.  Since channel numbers are based
 *     on frequency (5 MHz between each channel number), this is equivalent
 *     to interpolating based on channel number differences.
 *
 *     Note that the sample channels may or may not be the channels at the
 *     edges of the sub band.  The target channel may be "outside" of the
 *     span of the sampled channels.
 *
 *     Driver may choose the pair (for 2 Tx chains) of measurements (see
 *     struct il4965_eeprom_calib_ch_info) for which the actual measured
 *     txpower comes closest to the desired txpower.  Usually, though,
 *     the middle set of measurements is closest to the regulatory limits,
 *     and is therefore a good choice for all txpower calculations (this
 *     assumes that high accuracy is needed for maximizing legal txpower,
 *     while lower txpower configurations do not need as much accuracy).
 *
 *     Driver should interpolate both members of the chosen measurement pair,
 *     i.e. for both Tx chains (radio transmitters), unless the driver knows
 *     that only one of the chains will be used (e.g. only one tx antenna
 *     connected, but this should be unusual).  The rate scaling algorithm
 *     switches antennas to find best performance, so both Tx chains will
 *     be used (although only one at a time) even for non-MIMO transmissions.
 *
 *     Driver should interpolate factory values for temperature, gain table
 *     idx, and actual power.  The power amplifier detector values are
 *     not used by the driver.
 *
 *     Sanity check:  If the target channel happens to be one of the sample
 *     channels, the results should agree with the sample channel's
 *     measurements!
 *
 *
 * 5)  Find difference between desired txpower and (interpolated)
 *     factory-measured txpower.  Using (interpolated) factory gain table idx
 *     (shown elsewhere) as a starting point, adjust this idx lower to
 *     increase txpower, or higher to decrease txpower, until the target
 *     txpower is reached.  Each step in the gain table is 1/2 dB.
 *
 *     For example, if factory measured txpower is 16 dBm, and target txpower
 *     is 13 dBm, add 6 steps to the factory gain idx to reduce txpower
 *     by 3 dB.
 *
 *
 * 6)  Find difference between current device temperature and (interpolated)
 *     factory-measured temperature for sub-band.  Factory values are in
 *     degrees Celsius.  To calculate current temperature, see comments for
 *     "4965 temperature calculation".
 *
 *     If current temperature is higher than factory temperature, driver must
 *     increase gain (lower gain table idx), and vice verse.
 *
 *     Temperature affects gain differently for different channels:
 *
 *     2.4 GHz all channels:  3.5 degrees per half-dB step
 *     5 GHz channels 34-43:  4.5 degrees per half-dB step
 *     5 GHz channels >= 44:  4.0 degrees per half-dB step
 *
 *     NOTE:  Temperature can increase rapidly when transmitting, especially
 *            with heavy traffic at high txpowers.  Driver should update
 *            temperature calculations often under these conditions to
 *            maintain strong txpower in the face of rising temperature.
 *
 *
 * 7)  Find difference between current power supply voltage indicator
 *     (from "initialize alive") and factory-measured power supply voltage
 *     indicator (EEPROM).
 *
 *     If the current voltage is higher (indicator is lower) than factory
 *     voltage, gain should be reduced (gain table idx increased) by:
 *
 *     (eeprom - current) / 7
 *
 *     If the current voltage is lower (indicator is higher) than factory
 *     voltage, gain should be increased (gain table idx decreased) by:
 *
 *     2 * (current - eeprom) / 7
 *
 *     If number of idx steps in either direction turns out to be > 2,
 *     something is wrong ... just use 0.
 *
 *     NOTE:  Voltage compensation is independent of band/channel.
 *
 *     NOTE:  "Initialize" uCode measures current voltage, which is assumed
 *            to be constant after this initial measurement.  Voltage
 *            compensation for txpower (number of steps in gain table)
 *            may be calculated once and used until the next uCode bootload.
 *
 *
 * 8)  If setting up txpowers for MIMO rates (rate idxes 8-15, 24-31),
 *     adjust txpower for each transmitter chain, so txpower is balanced
 *     between the two chains.  There are 5 pairs of tx_atten[group][chain]
 *     values in "initialize alive", one pair for each of 5 channel ranges:
 *
 *     Group 0:  5 GHz channel 34-43
 *     Group 1:  5 GHz channel 44-70
 *     Group 2:  5 GHz channel 71-124
 *     Group 3:  5 GHz channel 125-200
 *     Group 4:  2.4 GHz all channels
 *
 *     Add the tx_atten[group][chain] value to the idx for the target chain.
 *     The values are signed, but are in pairs of 0 and a non-negative number,
 *     so as to reduce gain (if necessary) of the "hotter" channel.  This
 *     avoids any need to double-check for regulatory compliance after
 *     this step.
 *
 *
 * 9)  If setting up for a CCK rate, lower the gain by adding a CCK compensation
 *     value to the idx:
 *
 *     Hardware rev B:  9 steps (4.5 dB)
 *     Hardware rev C:  5 steps (2.5 dB)
 *
 *     Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG,
 *     bits [3:2], 1 = B, 2 = C.
 *
 *     NOTE:  This compensation is in addition to any saturation backoff that
 *            might have been applied in an earlier step.
 *
 *
 * 10) Select the gain table, based on band (2.4 vs 5 GHz).
 *
 *     Limit the adjusted idx to stay within the table!
 *
 *
 * 11) Read gain table entries for DSP and radio gain, place into appropriate
 *     location(s) in command (struct il4965_txpowertable_cmd).
 */

/**
 * When MIMO is used (2 transmitters operating simultaneously), driver should
 * limit each transmitter to deliver a max of 3 dB below the regulatory limit
 * for the device.  That is, use half power for each transmitter, so total
 * txpower is within regulatory limits.
 *
 * The value "6" represents number of steps in gain table to reduce power 3 dB.
 * Each step is 1/2 dB.
 */
#define IL_TX_POWER_MIMO_REGULATORY_COMPENSATION (6)

/**
 * CCK gain compensation.
 *
 * When calculating txpowers for CCK, after making sure that the target power
 * is within regulatory and saturation limits, driver must additionally
 * back off gain by adding these values to the gain table idx.
 *
 * Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG,
 * bits [3:2], 1 = B, 2 = C.
 */
#define IL_TX_POWER_CCK_COMPENSATION_B_STEP (9)
#define IL_TX_POWER_CCK_COMPENSATION_C_STEP (5)

/*
 * 4965 power supply voltage compensation for txpower
 */
#define TX_POWER_IL_VOLTAGE_CODES_PER_03V   (7)

/**
 * Gain tables.
 *
 * The following tables contain pair of values for setting txpower, i.e.
 * gain settings for the output of the device's digital signal processor (DSP),
 * and for the analog gain structure of the transmitter.
 *
 * Each entry in the gain tables represents a step of 1/2 dB.  Note that these
 * are *relative* steps, not indications of absolute output power.  Output
 * power varies with temperature, voltage, and channel frequency, and also
 * requires consideration of average power (to satisfy regulatory constraints),
 * and peak power (to avoid distortion of the output signal).
 *
 * Each entry contains two values:
 * 1)  DSP gain (or sometimes called DSP attenuation).  This is a fine-grained
 *     linear value that multiplies the output of the digital signal processor,
 *     before being sent to the analog radio.
 * 2)  Radio gain.  This sets the analog gain of the radio Tx path.
 *     It is a coarser setting, and behaves in a logarithmic (dB) fashion.
 *
 * EEPROM contains factory calibration data for txpower.  This maps actual
 * measured txpower levels to gain settings in the "well known" tables
 * below ("well-known" means here that both factory calibration *and* the
 * driver work with the same table).
 *
 * There are separate tables for 2.4 GHz and 5 GHz bands.  The 5 GHz table
 * has an extension (into negative idxes), in case the driver needs to
 * boost power setting for high device temperatures (higher than would be
 * present during factory calibration).  A 5 Ghz EEPROM idx of "40"
 * corresponds to the 49th entry in the table used by the driver.
 */
#define MIN_TX_GAIN_IDX		(0)	/* highest gain, lowest idx, 2.4 */
#define MIN_TX_GAIN_IDX_52GHZ_EXT	(-9)	/* highest gain, lowest idx, 5 */

/**
 * 2.4 GHz gain table
 *
 * Index    Dsp gain   Radio gain
 *   0        110         0x3f      (highest gain)
 *   1        104         0x3f
 *   2         98         0x3f
 *   3        110         0x3e
 *   4        104         0x3e
 *   5         98         0x3e
 *   6        110         0x3d
 *   7        104         0x3d
 *   8         98         0x3d
 *   9        110         0x3c
 *  10        104         0x3c
 *  11         98         0x3c
 *  12        110         0x3b
 *  13        104         0x3b
 *  14         98         0x3b
 *  15        110         0x3a
 *  16        104         0x3a
 *  17         98         0x3a
 *  18        110         0x39
 *  19        104         0x39
 *  20         98         0x39
 *  21        110         0x38
 *  22        104         0x38
 *  23         98         0x38
 *  24        110         0x37
 *  25        104         0x37
 *  26         98         0x37
 *  27        110         0x36
 *  28        104         0x36
 *  29         98         0x36
 *  30        110         0x35
 *  31        104         0x35
 *  32         98         0x35
 *  33        110         0x34
 *  34        104         0x34
 *  35         98         0x34
 *  36        110         0x33
 *  37        104         0x33
 *  38         98         0x33
 *  39        110         0x32
 *  40        104         0x32
 *  41         98         0x32
 *  42        110         0x31
 *  43        104         0x31
 *  44         98         0x31
 *  45        110         0x30
 *  46        104         0x30
 *  47         98         0x30
 *  48        110          0x6
 *  49        104          0x6
 *  50         98          0x6
 *  51        110          0x5
 *  52        104          0x5
 *  53         98          0x5
 *  54        110          0x4
 *  55        104          0x4
 *  56         98          0x4
 *  57        110          0x3
 *  58        104          0x3
 *  59         98          0x3
 *  60        110          0x2
 *  61        104          0x2
 *  62         98          0x2
 *  63        110          0x1
 *  64        104          0x1
 *  65         98          0x1
 *  66        110          0x0
 *  67        104          0x0
 *  68         98          0x0
 *  69         97            0
 *  70         96            0
 *  71         95            0
 *  72         94            0
 *  73         93            0
 *  74         92            0
 *  75         91            0
 *  76         90            0
 *  77         89            0
 *  78         88            0
 *  79         87            0
 *  80         86            0
 *  81         85            0
 *  82         84            0
 *  83         83            0
 *  84         82            0
 *  85         81            0
 *  86         80            0
 *  87         79            0
 *  88         78            0
 *  89         77            0
 *  90         76            0
 *  91         75            0
 *  92         74            0
 *  93         73            0
 *  94         72            0
 *  95         71            0
 *  96         70            0
 *  97         69            0
 *  98         68            0
 */

/**
 * 5 GHz gain table
 *
 * Index    Dsp gain   Radio gain
 *  -9 	      123         0x3F      (highest gain)
 *  -8 	      117         0x3F
 *  -7        110         0x3F
 *  -6        104         0x3F
 *  -5         98         0x3F
 *  -4        110         0x3E
 *  -3        104         0x3E
 *  -2         98         0x3E
 *  -1        110         0x3D
 *   0        104         0x3D
 *   1         98         0x3D
 *   2        110         0x3C
 *   3        104         0x3C
 *   4         98         0x3C
 *   5        110         0x3B
 *   6        104         0x3B
 *   7         98         0x3B
 *   8        110         0x3A
 *   9        104         0x3A
 *  10         98         0x3A
 *  11        110         0x39
 *  12        104         0x39
 *  13         98         0x39
 *  14        110         0x38
 *  15        104         0x38
 *  16         98         0x38
 *  17        110         0x37
 *  18        104         0x37
 *  19         98         0x37
 *  20        110         0x36
 *  21        104         0x36
 *  22         98         0x36
 *  23        110         0x35
 *  24        104         0x35
 *  25         98         0x35
 *  26        110         0x34
 *  27        104         0x34
 *  28         98         0x34
 *  29        110         0x33
 *  30        104         0x33
 *  31         98         0x33
 *  32        110         0x32
 *  33        104         0x32
 *  34         98         0x32
 *  35        110         0x31
 *  36        104         0x31
 *  37         98         0x31
 *  38        110         0x30
 *  39        104         0x30
 *  40         98         0x30
 *  41        110         0x25
 *  42        104         0x25
 *  43         98         0x25
 *  44        110         0x24
 *  45        104         0x24
 *  46         98         0x24
 *  47        110         0x23
 *  48        104         0x23
 *  49         98         0x23
 *  50        110         0x22
 *  51        104         0x18
 *  52         98         0x18
 *  53        110         0x17
 *  54        104         0x17
 *  55         98         0x17
 *  56        110         0x16
 *  57        104         0x16
 *  58         98         0x16
 *  59        110         0x15
 *  60        104         0x15
 *  61         98         0x15
 *  62        110         0x14
 *  63        104         0x14
 *  64         98         0x14
 *  65        110         0x13
 *  66        104         0x13
 *  67         98         0x13
 *  68        110         0x12
 *  69        104         0x08
 *  70         98         0x08
 *  71        110         0x07
 *  72        104         0x07
 *  73         98         0x07
 *  74        110         0x06
 *  75        104         0x06
 *  76         98         0x06
 *  77        110         0x05
 *  78        104         0x05
 *  79         98         0x05
 *  80        110         0x04
 *  81        104         0x04
 *  82         98         0x04
 *  83        110         0x03
 *  84        104         0x03
 *  85         98         0x03
 *  86        110         0x02
 *  87        104         0x02
 *  88         98         0x02
 *  89        110         0x01
 *  90        104         0x01
 *  91         98         0x01
 *  92        110         0x00
 *  93        104         0x00
 *  94         98         0x00
 *  95         93         0x00
 *  96         88         0x00
 *  97         83         0x00
 *  98         78         0x00
 */

/**
 * Sanity checks and default values for EEPROM regulatory levels.
 * If EEPROM values fall outside MIN/MAX range, use default values.
 *
 * Regulatory limits refer to the maximum average txpower allowed by
 * regulatory agencies in the geographies in which the device is meant
 * to be operated.  These limits are SKU-specific (i.e. geography-specific),
 * and channel-specific; each channel has an individual regulatory limit
 * listed in the EEPROM.
 *
 * Units are in half-dBm (i.e. "34" means 17 dBm).
 */
#define IL_TX_POWER_DEFAULT_REGULATORY_24   (34)
#define IL_TX_POWER_DEFAULT_REGULATORY_52   (34)
#define IL_TX_POWER_REGULATORY_MIN          (0)
#define IL_TX_POWER_REGULATORY_MAX          (34)

/**
 * Sanity checks and default values for EEPROM saturation levels.
 * If EEPROM values fall outside MIN/MAX range, use default values.
 *
 * Saturation is the highest level that the output power amplifier can produce
 * without significant clipping distortion.  This is a "peak" power level.
 * Different types of modulation (i.e. various "rates", and OFDM vs. CCK)
 * require differing amounts of backoff, relative to their average power output,
 * in order to avoid clipping distortion.
 *
 * Driver must make sure that it is violating neither the saturation limit,
 * nor the regulatory limit, when calculating Tx power settings for various
 * rates.
 *
 * Units are in half-dBm (i.e. "38" means 19 dBm).
 */
#define IL_TX_POWER_DEFAULT_SATURATION_24   (38)
#define IL_TX_POWER_DEFAULT_SATURATION_52   (38)
#define IL_TX_POWER_SATURATION_MIN          (20)
#define IL_TX_POWER_SATURATION_MAX          (50)

/**
 * Channel groups used for Tx Attenuation calibration (MIMO tx channel balance)
 * and thermal Txpower calibration.
 *
 * When calculating txpower, driver must compensate for current device
 * temperature; higher temperature requires higher gain.  Driver must calculate
 * current temperature (see "4965 temperature calculation"), then compare vs.
 * factory calibration temperature in EEPROM; if current temperature is higher
 * than factory temperature, driver must *increase* gain by proportions shown
 * in table below.  If current temperature is lower than factory, driver must
 * *decrease* gain.
 *
 * Different frequency ranges require different compensation, as shown below.
 */
/* Group 0, 5.2 GHz ch 34-43:  4.5 degrees per 1/2 dB. */
#define CALIB_IL_TX_ATTEN_GR1_FCH 34
#define CALIB_IL_TX_ATTEN_GR1_LCH 43

/* Group 1, 5.3 GHz ch 44-70:  4.0 degrees per 1/2 dB. */
#define CALIB_IL_TX_ATTEN_GR2_FCH 44
#define CALIB_IL_TX_ATTEN_GR2_LCH 70

/* Group 2, 5.5 GHz ch 71-124:  4.0 degrees per 1/2 dB. */
#define CALIB_IL_TX_ATTEN_GR3_FCH 71
#define CALIB_IL_TX_ATTEN_GR3_LCH 124

/* Group 3, 5.7 GHz ch 125-200:  4.0 degrees per 1/2 dB. */
#define CALIB_IL_TX_ATTEN_GR4_FCH 125
#define CALIB_IL_TX_ATTEN_GR4_LCH 200

/* Group 4, 2.4 GHz all channels:  3.5 degrees per 1/2 dB. */
#define CALIB_IL_TX_ATTEN_GR5_FCH 1
#define CALIB_IL_TX_ATTEN_GR5_LCH 20

enum {
	CALIB_CH_GROUP_1 = 0,
	CALIB_CH_GROUP_2 = 1,
	CALIB_CH_GROUP_3 = 2,
	CALIB_CH_GROUP_4 = 3,
	CALIB_CH_GROUP_5 = 4,
	CALIB_CH_GROUP_MAX
};

/********************* END TXPOWER *****************************************/

/**
 * Tx/Rx Queues
 *
 * Most communication between driver and 4965 is via queues of data buffers.
 * For example, all commands that the driver issues to device's embedded
 * controller (uCode) are via the command queue (one of the Tx queues).  All
 * uCode command responses/replies/notifications, including Rx frames, are
 * conveyed from uCode to driver via the Rx queue.
 *
 * Most support for these queues, including handshake support, resides in
 * structures in host DRAM, shared between the driver and the device.  When
 * allocating this memory, the driver must make sure that data written by
 * the host CPU updates DRAM immediately (and does not get "stuck" in CPU's
 * cache memory), so DRAM and cache are consistent, and the device can
 * immediately see changes made by the driver.
 *
 * 4965 supports up to 16 DRAM-based Tx queues, and services these queues via
 * up to 7 DMA channels (FIFOs).  Each Tx queue is supported by a circular array
 * in DRAM containing 256 Transmit Frame Descriptors (TFDs).
 */
#define IL49_NUM_FIFOS	7
#define IL49_CMD_FIFO_NUM	4
#define IL49_NUM_QUEUES	16
#define IL49_NUM_AMPDU_QUEUES	8

/**
 * struct il4965_schedq_bc_tbl
 *
 * Byte Count table
 *
 * Each Tx queue uses a byte-count table containing 320 entries:
 * one 16-bit entry for each of 256 TFDs, plus an additional 64 entries that
 * duplicate the first 64 entries (to avoid wrap-around within a Tx win;
 * max Tx win is 64 TFDs).
 *
 * When driver sets up a new TFD, it must also enter the total byte count
 * of the frame to be transmitted into the corresponding entry in the byte
 * count table for the chosen Tx queue.  If the TFD idx is 0-63, the driver
 * must duplicate the byte count entry in corresponding idx 256-319.
 *
 * padding puts each byte count table on a 1024-byte boundary;
 * 4965 assumes tables are separated by 1024 bytes.
 */
struct il4965_scd_bc_tbl {
	__le16 tfd_offset[TFD_QUEUE_BC_SIZE];
	u8 pad[1024 - (TFD_QUEUE_BC_SIZE) * sizeof(__le16)];
} __packed;

#define IL4965_RTC_INST_LOWER_BOUND		(0x000000)

/* RSSI to dBm */
#define IL4965_RSSI_OFFSET	44

/* PCI registers */
#define PCI_CFG_RETRY_TIMEOUT	0x041

#define IL4965_DEFAULT_TX_RETRY  15

/* EEPROM */
#define IL4965_FIRST_AMPDU_QUEUE	10

/* Calibration */
void il4965_chain_noise_calibration(struct il_priv *il, void *stat_resp);
void il4965_sensitivity_calibration(struct il_priv *il, void *resp);
void il4965_init_sensitivity(struct il_priv *il);
void il4965_reset_run_time_calib(struct il_priv *il);

/* Debug */
#ifdef CONFIG_IWLEGACY_DEBUGFS
extern const struct il_debugfs_ops il4965_debugfs_ops;
#endif

/****************************/
/* Flow Handler Definitions */
/****************************/

/**
 * This I/O area is directly read/writable by driver (e.g. Linux uses writel())
 * Addresses are offsets from device's PCI hardware base address.
 */
#define FH49_MEM_LOWER_BOUND                   (0x1000)
#define FH49_MEM_UPPER_BOUND                   (0x2000)

/**
 * Keep-Warm (KW) buffer base address.
 *
 * Driver must allocate a 4KByte buffer that is used by 4965 for keeping the
 * host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency
 * DRAM access when 4965 is Txing or Rxing.  The dummy accesses prevent host
 * from going into a power-savings mode that would cause higher DRAM latency,
 * and possible data over/under-runs, before all Tx/Rx is complete.
 *
 * Driver loads FH49_KW_MEM_ADDR_REG with the physical address (bits 35:4)
 * of the buffer, which must be 4K aligned.  Once this is set up, the 4965
 * automatically invokes keep-warm accesses when normal accesses might not
 * be sufficient to maintain fast DRAM response.
 *
 * Bit fields:
 *  31-0:  Keep-warm buffer physical base address [35:4], must be 4K aligned
 */
#define FH49_KW_MEM_ADDR_REG		     (FH49_MEM_LOWER_BOUND + 0x97C)

/**
 * TFD Circular Buffers Base (CBBC) addresses
 *
 * 4965 has 16 base pointer registers, one for each of 16 host-DRAM-resident
 * circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs)
 * (see struct il_tfd_frame).  These 16 pointer registers are offset by 0x04
 * bytes from one another.  Each TFD circular buffer in DRAM must be 256-byte
 * aligned (address bits 0-7 must be 0).
 *
 * Bit fields in each pointer register:
 *  27-0: TFD CB physical base address [35:8], must be 256-byte aligned
 */
#define FH49_MEM_CBBC_LOWER_BOUND          (FH49_MEM_LOWER_BOUND + 0x9D0)
#define FH49_MEM_CBBC_UPPER_BOUND          (FH49_MEM_LOWER_BOUND + 0xA10)

/* Find TFD CB base pointer for given queue (range 0-15). */
#define FH49_MEM_CBBC_QUEUE(x)  (FH49_MEM_CBBC_LOWER_BOUND + (x) * 0x4)

/**
 * Rx SRAM Control and Status Registers (RSCSR)
 *
 * These registers provide handshake between driver and 4965 for the Rx queue
 * (this queue handles *all* command responses, notifications, Rx data, etc.
 * sent from 4965 uCode to host driver).  Unlike Tx, there is only one Rx
 * queue, and only one Rx DMA/FIFO channel.  Also unlike Tx, which can
 * concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer
 * Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1
 * mapping between RBDs and RBs.
 *
 * Driver must allocate host DRAM memory for the following, and set the
 * physical address of each into 4965 registers:
 *
 * 1)  Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256
 *     entries (although any power of 2, up to 4096, is selectable by driver).
 *     Each entry (1 dword) points to a receive buffer (RB) of consistent size
 *     (typically 4K, although 8K or 16K are also selectable by driver).
 *     Driver sets up RB size and number of RBDs in the CB via Rx config
 *     register FH49_MEM_RCSR_CHNL0_CONFIG_REG.
 *
 *     Bit fields within one RBD:
 *     27-0:  Receive Buffer physical address bits [35:8], 256-byte aligned
 *
 *     Driver sets physical address [35:8] of base of RBD circular buffer
 *     into FH49_RSCSR_CHNL0_RBDCB_BASE_REG [27:0].
 *
 * 2)  Rx status buffer, 8 bytes, in which 4965 indicates which Rx Buffers
 *     (RBs) have been filled, via a "write pointer", actually the idx of
 *     the RB's corresponding RBD within the circular buffer.  Driver sets
 *     physical address [35:4] into FH49_RSCSR_CHNL0_STTS_WPTR_REG [31:0].
 *
 *     Bit fields in lower dword of Rx status buffer (upper dword not used
 *     by driver; see struct il4965_shared, val0):
 *     31-12:  Not used by driver
 *     11- 0:  Index of last filled Rx buffer descriptor
 *             (4965 writes, driver reads this value)
 *
 * As the driver prepares Receive Buffers (RBs) for 4965 to fill, driver must
 * enter pointers to these RBs into contiguous RBD circular buffer entries,
 * and update the 4965's "write" idx register,
 * FH49_RSCSR_CHNL0_RBDCB_WPTR_REG.
 *
 * This "write" idx corresponds to the *next* RBD that the driver will make
 * available, i.e. one RBD past the tail of the ready-to-fill RBDs within
 * the circular buffer.  This value should initially be 0 (before preparing any
 * RBs), should be 8 after preparing the first 8 RBs (for example), and must
 * wrap back to 0 at the end of the circular buffer (but don't wrap before
 * "read" idx has advanced past 1!  See below).
 * NOTE:  4965 EXPECTS THE WRITE IDX TO BE INCREMENTED IN MULTIPLES OF 8.
 *
 * As the 4965 fills RBs (referenced from contiguous RBDs within the circular
 * buffer), it updates the Rx status buffer in host DRAM, 2) described above,
 * to tell the driver the idx of the latest filled RBD.  The driver must
 * read this "read" idx from DRAM after receiving an Rx interrupt from 4965.
 *
 * The driver must also internally keep track of a third idx, which is the
 * next RBD to process.  When receiving an Rx interrupt, driver should process
 * all filled but unprocessed RBs up to, but not including, the RB
 * corresponding to the "read" idx.  For example, if "read" idx becomes "1",
 * driver may process the RB pointed to by RBD 0.  Depending on volume of
 * traffic, there may be many RBs to process.
 *
 * If read idx == write idx, 4965 thinks there is no room to put new data.
 * Due to this, the maximum number of filled RBs is 255, instead of 256.  To
 * be safe, make sure that there is a gap of at least 2 RBDs between "write"
 * and "read" idxes; that is, make sure that there are no more than 254
 * buffers waiting to be filled.
 */
#define FH49_MEM_RSCSR_LOWER_BOUND	(FH49_MEM_LOWER_BOUND + 0xBC0)
#define FH49_MEM_RSCSR_UPPER_BOUND	(FH49_MEM_LOWER_BOUND + 0xC00)
#define FH49_MEM_RSCSR_CHNL0		(FH49_MEM_RSCSR_LOWER_BOUND)

/**
 * Physical base address of 8-byte Rx Status buffer.
 * Bit fields:
 *  31-0: Rx status buffer physical base address [35:4], must 16-byte aligned.
 */
#define FH49_RSCSR_CHNL0_STTS_WPTR_REG	(FH49_MEM_RSCSR_CHNL0)

/**
 * Physical base address of Rx Buffer Descriptor Circular Buffer.
 * Bit fields:
 *  27-0:  RBD CD physical base address [35:8], must be 256-byte aligned.
 */
#define FH49_RSCSR_CHNL0_RBDCB_BASE_REG	(FH49_MEM_RSCSR_CHNL0 + 0x004)

/**
 * Rx write pointer (idx, really!).
 * Bit fields:
 *  11-0:  Index of driver's most recent prepared-to-be-filled RBD, + 1.
 *         NOTE:  For 256-entry circular buffer, use only bits [7:0].
 */
#define FH49_RSCSR_CHNL0_RBDCB_WPTR_REG	(FH49_MEM_RSCSR_CHNL0 + 0x008)
#define FH49_RSCSR_CHNL0_WPTR        (FH49_RSCSR_CHNL0_RBDCB_WPTR_REG)

/**
 * Rx Config/Status Registers (RCSR)
 * Rx Config Reg for channel 0 (only channel used)
 *
 * Driver must initialize FH49_MEM_RCSR_CHNL0_CONFIG_REG as follows for
 * normal operation (see bit fields).
 *
 * Clearing FH49_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA.
 * Driver should poll FH49_MEM_RSSR_RX_STATUS_REG	for
 * FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing.
 *
 * Bit fields:
 * 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame,
 *        '10' operate normally
 * 29-24: reserved
 * 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal),
 *        min "5" for 32 RBDs, max "12" for 4096 RBDs.
 * 19-18: reserved
 * 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K,
 *        '10' 12K, '11' 16K.
 * 15-14: reserved
 * 13-12: IRQ destination; '00' none, '01' host driver (normal operation)
 * 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec)
 *        typical value 0x10 (about 1/2 msec)
 *  3- 0: reserved
 */
#define FH49_MEM_RCSR_LOWER_BOUND      (FH49_MEM_LOWER_BOUND + 0xC00)
#define FH49_MEM_RCSR_UPPER_BOUND      (FH49_MEM_LOWER_BOUND + 0xCC0)
#define FH49_MEM_RCSR_CHNL0            (FH49_MEM_RCSR_LOWER_BOUND)

#define FH49_MEM_RCSR_CHNL0_CONFIG_REG	(FH49_MEM_RCSR_CHNL0)

#define FH49_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MSK (0x00000FF0)	/* bits 4-11 */
#define FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MSK   (0x00001000)	/* bits 12 */
#define FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK (0x00008000)	/* bit 15 */
#define FH49_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MSK   (0x00030000)	/* bits 16-17 */
#define FH49_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MSK (0x00F00000)	/* bits 20-23 */
#define FH49_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MSK (0xC0000000)	/* bits 30-31 */

#define FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS	(20)
#define FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS	(4)
#define RX_RB_TIMEOUT	(0x10)

#define FH49_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL         (0x00000000)
#define FH49_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL     (0x40000000)
#define FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL        (0x80000000)

#define FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K    (0x00000000)
#define FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K    (0x00010000)
#define FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K   (0x00020000)
#define FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K   (0x00030000)

#define FH49_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY              (0x00000004)
#define FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL    (0x00000000)
#define FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL  (0x00001000)

/**
 * Rx Shared Status Registers (RSSR)
 *
 * After stopping Rx DMA channel (writing 0 to
 * FH49_MEM_RCSR_CHNL0_CONFIG_REG), driver must poll
 * FH49_MEM_RSSR_RX_STATUS_REG until Rx channel is idle.
 *
 * Bit fields:
 *  24:  1 = Channel 0 is idle
 *
 * FH49_MEM_RSSR_SHARED_CTRL_REG and FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV
 * contain default values that should not be altered by the driver.
 */
#define FH49_MEM_RSSR_LOWER_BOUND           (FH49_MEM_LOWER_BOUND + 0xC40)
#define FH49_MEM_RSSR_UPPER_BOUND           (FH49_MEM_LOWER_BOUND + 0xD00)

#define FH49_MEM_RSSR_SHARED_CTRL_REG       (FH49_MEM_RSSR_LOWER_BOUND)
#define FH49_MEM_RSSR_RX_STATUS_REG	(FH49_MEM_RSSR_LOWER_BOUND + 0x004)
#define FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV\
					(FH49_MEM_RSSR_LOWER_BOUND + 0x008)

#define FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE	(0x01000000)

#define FH49_MEM_TFDIB_REG1_ADDR_BITSHIFT	28

/* TFDB  Area - TFDs buffer table */
#define FH49_MEM_TFDIB_DRAM_ADDR_LSB_MSK      (0xFFFFFFFF)
#define FH49_TFDIB_LOWER_BOUND       (FH49_MEM_LOWER_BOUND + 0x900)
#define FH49_TFDIB_UPPER_BOUND       (FH49_MEM_LOWER_BOUND + 0x958)
#define FH49_TFDIB_CTRL0_REG(_chnl)  (FH49_TFDIB_LOWER_BOUND + 0x8 * (_chnl))
#define FH49_TFDIB_CTRL1_REG(_chnl)  (FH49_TFDIB_LOWER_BOUND + 0x8 * (_chnl) + 0x4)

/**
 * Transmit DMA Channel Control/Status Registers (TCSR)
 *
 * 4965 has one configuration register for each of 8 Tx DMA/FIFO channels
 * supported in hardware (don't confuse these with the 16 Tx queues in DRAM,
 * which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes.
 *
 * To use a Tx DMA channel, driver must initialize its
 * FH49_TCSR_CHNL_TX_CONFIG_REG(chnl) with:
 *
 * FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
 * FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
 *
 * All other bits should be 0.
 *
 * Bit fields:
 * 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame,
 *        '10' operate normally
 * 29- 4: Reserved, set to "0"
 *     3: Enable internal DMA requests (1, normal operation), disable (0)
 *  2- 0: Reserved, set to "0"
 */
#define FH49_TCSR_LOWER_BOUND  (FH49_MEM_LOWER_BOUND + 0xD00)
#define FH49_TCSR_UPPER_BOUND  (FH49_MEM_LOWER_BOUND + 0xE60)

/* Find Control/Status reg for given Tx DMA/FIFO channel */
#define FH49_TCSR_CHNL_NUM                            (7)
#define FH50_TCSR_CHNL_NUM                            (8)

/* TCSR: tx_config register values */
#define FH49_TCSR_CHNL_TX_CONFIG_REG(_chnl)	\
		(FH49_TCSR_LOWER_BOUND + 0x20 * (_chnl))
#define FH49_TCSR_CHNL_TX_CREDIT_REG(_chnl)	\
		(FH49_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x4)
#define FH49_TCSR_CHNL_TX_BUF_STS_REG(_chnl)	\
		(FH49_TCSR_LOWER_BOUND + 0x20 * (_chnl) + 0x8)

#define FH49_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_TXF		(0x00000000)
#define FH49_TCSR_TX_CONFIG_REG_VAL_MSG_MODE_DRV		(0x00000001)

#define FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE	(0x00000000)
#define FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE	(0x00000008)

#define FH49_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_NOINT	(0x00000000)
#define FH49_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD	(0x00100000)
#define FH49_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD	(0x00200000)

#define FH49_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_NOINT	(0x00000000)
#define FH49_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_ENDTFD	(0x00400000)
#define FH49_TCSR_TX_CONFIG_REG_VAL_CIRQ_RTC_IFTFD	(0x00800000)

#define FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE	(0x00000000)
#define FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF	(0x40000000)
#define FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE	(0x80000000)

#define FH49_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_EMPTY	(0x00000000)
#define FH49_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_WAIT	(0x00002000)
#define FH49_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID	(0x00000003)

#define FH49_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM		(20)
#define FH49_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX		(12)

/**
 * Tx Shared Status Registers (TSSR)
 *
 * After stopping Tx DMA channel (writing 0 to
 * FH49_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll
 * FH49_TSSR_TX_STATUS_REG until selected Tx channel is idle
 * (channel's buffers empty | no pending requests).
 *
 * Bit fields:
 * 31-24:  1 = Channel buffers empty (channel 7:0)
 * 23-16:  1 = No pending requests (channel 7:0)
 */
#define FH49_TSSR_LOWER_BOUND		(FH49_MEM_LOWER_BOUND + 0xEA0)
#define FH49_TSSR_UPPER_BOUND		(FH49_MEM_LOWER_BOUND + 0xEC0)

#define FH49_TSSR_TX_STATUS_REG		(FH49_TSSR_LOWER_BOUND + 0x010)

/**
 * Bit fields for TSSR(Tx Shared Status & Control) error status register:
 * 31:  Indicates an address error when accessed to internal memory
 *	uCode/driver must write "1" in order to clear this flag
 * 30:  Indicates that Host did not send the expected number of dwords to FH
 *	uCode/driver must write "1" in order to clear this flag
 * 16-9:Each status bit is for one channel. Indicates that an (Error) ActDMA
 *	command was received from the scheduler while the TRB was already full
 *	with previous command
 *	uCode/driver must write "1" in order to clear this flag
 * 7-0: Each status bit indicates a channel's TxCredit error. When an error
 *	bit is set, it indicates that the FH has received a full indication
 *	from the RTC TxFIFO and the current value of the TxCredit counter was
 *	not equal to zero. This mean that the credit mechanism was not
 *	synchronized to the TxFIFO status
 *	uCode/driver must write "1" in order to clear this flag
 */
#define FH49_TSSR_TX_ERROR_REG		(FH49_TSSR_LOWER_BOUND + 0x018)

#define FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) ((1 << (_chnl)) << 16)

/* Tx service channels */
#define FH49_SRVC_CHNL		(9)
#define FH49_SRVC_LOWER_BOUND	(FH49_MEM_LOWER_BOUND + 0x9C8)
#define FH49_SRVC_UPPER_BOUND	(FH49_MEM_LOWER_BOUND + 0x9D0)
#define FH49_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \
		(FH49_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4)

#define FH49_TX_CHICKEN_BITS_REG	(FH49_MEM_LOWER_BOUND + 0xE98)
/* Instruct FH to increment the retry count of a packet when
 * it is brought from the memory to TX-FIFO
 */
#define FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN	(0x00000002)

/* Keep Warm Size */
#define IL_KW_SIZE 0x1000	/* 4k */

#endif /* __il_4965_h__ */