summaryrefslogtreecommitdiffstats
path: root/drivers/net/ieee802154/adf7242.c
blob: 400fdbd3a12097f827781e3e1978dd2097f5af70 (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
/*
 * Analog Devices ADF7242 Low-Power IEEE 802.15.4 Transceiver
 *
 * Copyright 2009-2015 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 *
 * http://www.analog.com/ADF7242
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/firmware.h>
#include <linux/spi/spi.h>
#include <linux/skbuff.h>
#include <linux/of.h>
#include <linux/irq.h>
#include <linux/debugfs.h>
#include <linux/bitops.h>
#include <linux/ieee802154.h>
#include <net/mac802154.h>
#include <net/cfg802154.h>

#define FIRMWARE "adf7242_firmware.bin"
#define MAX_POLL_LOOPS 200

/* All Registers */

#define REG_EXT_CTRL	0x100	/* RW External LNA/PA and internal PA control */
#define REG_TX_FSK_TEST 0x101	/* RW TX FSK test mode configuration */
#define REG_CCA1	0x105	/* RW RSSI threshold for CCA */
#define REG_CCA2	0x106	/* RW CCA mode configuration */
#define REG_BUFFERCFG	0x107	/* RW RX_BUFFER overwrite control */
#define REG_PKT_CFG	0x108	/* RW FCS evaluation configuration */
#define REG_DELAYCFG0	0x109	/* RW RC_RX command to SFD or sync word delay */
#define REG_DELAYCFG1	0x10A	/* RW RC_TX command to TX state */
#define REG_DELAYCFG2	0x10B	/* RW Mac delay extension */
#define REG_SYNC_WORD0	0x10C	/* RW sync word bits [7:0] of [23:0]  */
#define REG_SYNC_WORD1	0x10D	/* RW sync word bits [15:8] of [23:0]  */
#define REG_SYNC_WORD2	0x10E	/* RW sync word bits [23:16] of [23:0]	*/
#define REG_SYNC_CONFIG	0x10F	/* RW sync word configuration */
#define REG_RC_CFG	0x13E	/* RW RX / TX packet configuration */
#define REG_RC_VAR44	0x13F	/* RW RESERVED */
#define REG_CH_FREQ0	0x300	/* RW Channel Frequency Settings - Low */
#define REG_CH_FREQ1	0x301	/* RW Channel Frequency Settings - Middle */
#define REG_CH_FREQ2	0x302	/* RW Channel Frequency Settings - High */
#define REG_TX_FD	0x304	/* RW TX Frequency Deviation Register */
#define REG_DM_CFG0	0x305	/* RW RX Discriminator BW Register */
#define REG_TX_M	0x306	/* RW TX Mode Register */
#define REG_RX_M	0x307	/* RW RX Mode Register */
#define REG_RRB		0x30C	/* R RSSI Readback Register */
#define REG_LRB		0x30D	/* R Link Quality Readback Register */
#define REG_DR0		0x30E	/* RW bits [15:8] of [15:0] data rate setting */
#define REG_DR1		0x30F	/* RW bits [7:0] of [15:0] data rate setting */
#define REG_PRAMPG	0x313	/* RW RESERVED */
#define REG_TXPB	0x314	/* RW TX Packet Storage Base Address */
#define REG_RXPB	0x315	/* RW RX Packet Storage Base Address */
#define REG_TMR_CFG0	0x316	/* RW Wake up Timer Conf Register - High */
#define REG_TMR_CFG1	0x317	/* RW Wake up Timer Conf Register - Low */
#define REG_TMR_RLD0	0x318	/* RW Wake up Timer Value Register - High */
#define REG_TMR_RLD1	0x319	/* RW Wake up Timer Value Register - Low  */
#define REG_TMR_CTRL	0x31A	/* RW Wake up Timer Timeout flag */
#define REG_PD_AUX	0x31E	/* RW Battmon enable */
#define REG_GP_CFG	0x32C	/* RW GPIO Configuration */
#define REG_GP_OUT	0x32D	/* RW GPIO Configuration */
#define REG_GP_IN	0x32E	/* R GPIO Configuration */
#define REG_SYNT	0x335	/* RW bandwidth calibration timers */
#define REG_CAL_CFG	0x33D	/* RW Calibration Settings */
#define REG_PA_BIAS	0x36E	/* RW PA BIAS */
#define REG_SYNT_CAL	0x371	/* RW Oscillator and Doubler Configuration */
#define REG_IIRF_CFG	0x389	/* RW BB Filter Decimation Rate */
#define REG_CDR_CFG	0x38A	/* RW CDR kVCO */
#define REG_DM_CFG1	0x38B	/* RW Postdemodulator Filter */
#define REG_AGCSTAT	0x38E	/* R RXBB Ref Osc Calibration Engine Readback */
#define REG_RXCAL0	0x395	/* RW RX BB filter tuning, LSB */
#define REG_RXCAL1	0x396	/* RW RX BB filter tuning, MSB */
#define REG_RXFE_CFG	0x39B	/* RW RXBB Ref Osc & RXFE Calibration */
#define REG_PA_RR	0x3A7	/* RW Set PA ramp rate */
#define REG_PA_CFG	0x3A8	/* RW PA enable */
#define REG_EXTPA_CFG	0x3A9	/* RW External PA BIAS DAC */
#define REG_EXTPA_MSC	0x3AA	/* RW PA Bias Mode */
#define REG_ADC_RBK	0x3AE	/* R Readback temp */
#define REG_AGC_CFG1	0x3B2	/* RW GC Parameters */
#define REG_AGC_MAX	0x3B4	/* RW Slew rate	 */
#define REG_AGC_CFG2	0x3B6	/* RW RSSI Parameters */
#define REG_AGC_CFG3	0x3B7	/* RW RSSI Parameters */
#define REG_AGC_CFG4	0x3B8	/* RW RSSI Parameters */
#define REG_AGC_CFG5	0x3B9	/* RW RSSI & NDEC Parameters */
#define REG_AGC_CFG6	0x3BA	/* RW NDEC Parameters */
#define REG_OCL_CFG1	0x3C4	/* RW OCL System Parameters */
#define REG_IRQ1_EN0	0x3C7	/* RW Interrupt Mask set bits for IRQ1 */
#define REG_IRQ1_EN1	0x3C8	/* RW Interrupt Mask set bits for IRQ1 */
#define REG_IRQ2_EN0	0x3C9	/* RW Interrupt Mask set bits for IRQ2 */
#define REG_IRQ2_EN1	0x3CA	/* RW Interrupt Mask set bits for IRQ2 */
#define REG_IRQ1_SRC0	0x3CB	/* RW Interrupt Source bits for IRQ */
#define REG_IRQ1_SRC1	0x3CC	/* RW Interrupt Source bits for IRQ */
#define REG_OCL_BW0	0x3D2	/* RW OCL System Parameters */
#define REG_OCL_BW1	0x3D3	/* RW OCL System Parameters */
#define REG_OCL_BW2	0x3D4	/* RW OCL System Parameters */
#define REG_OCL_BW3	0x3D5	/* RW OCL System Parameters */
#define REG_OCL_BW4	0x3D6	/* RW OCL System Parameters */
#define REG_OCL_BWS	0x3D7	/* RW OCL System Parameters */
#define REG_OCL_CFG13	0x3E0	/* RW OCL System Parameters */
#define REG_GP_DRV	0x3E3	/* RW I/O pads Configuration and bg trim */
#define REG_BM_CFG	0x3E6	/* RW Batt. Monitor Threshold Voltage setting */
#define REG_SFD_15_4	0x3F4	/* RW Option to set non standard SFD */
#define REG_AFC_CFG	0x3F7	/* RW AFC mode and polarity */
#define REG_AFC_KI_KP	0x3F8	/* RW AFC ki and kp */
#define REG_AFC_RANGE	0x3F9	/* RW AFC range */
#define REG_AFC_READ	0x3FA	/* RW Readback frequency error */

/* REG_EXTPA_MSC */
#define PA_PWR(x)		(((x) & 0xF) << 4)
#define EXTPA_BIAS_SRC		BIT(3)
#define EXTPA_BIAS_MODE(x)	(((x) & 0x7) << 0)

/* REG_PA_CFG */
#define PA_BRIDGE_DBIAS(x)	(((x) & 0x1F) << 0)
#define PA_DBIAS_HIGH_POWER	21
#define PA_DBIAS_LOW_POWER	13

/* REG_PA_BIAS */
#define PA_BIAS_CTRL(x)		(((x) & 0x1F) << 1)
#define REG_PA_BIAS_DFL		BIT(0)
#define PA_BIAS_HIGH_POWER	63
#define PA_BIAS_LOW_POWER	55

#define REG_PAN_ID0		0x112
#define REG_PAN_ID1		0x113
#define REG_SHORT_ADDR_0	0x114
#define REG_SHORT_ADDR_1	0x115
#define REG_IEEE_ADDR_0		0x116
#define REG_IEEE_ADDR_1		0x117
#define REG_IEEE_ADDR_2		0x118
#define REG_IEEE_ADDR_3		0x119
#define REG_IEEE_ADDR_4		0x11A
#define REG_IEEE_ADDR_5		0x11B
#define REG_IEEE_ADDR_6		0x11C
#define REG_IEEE_ADDR_7		0x11D
#define REG_FFILT_CFG		0x11E
#define REG_AUTO_CFG		0x11F
#define REG_AUTO_TX1		0x120
#define REG_AUTO_TX2		0x121
#define REG_AUTO_STATUS		0x122

/* REG_FFILT_CFG */
#define ACCEPT_BEACON_FRAMES   BIT(0)
#define ACCEPT_DATA_FRAMES     BIT(1)
#define ACCEPT_ACK_FRAMES      BIT(2)
#define ACCEPT_MACCMD_FRAMES   BIT(3)
#define ACCEPT_RESERVED_FRAMES BIT(4)
#define ACCEPT_ALL_ADDRESS     BIT(5)

/* REG_AUTO_CFG */
#define AUTO_ACK_FRAMEPEND     BIT(0)
#define IS_PANCOORD	       BIT(1)
#define RX_AUTO_ACK_EN	       BIT(3)
#define CSMA_CA_RX_TURNAROUND  BIT(4)

/* REG_AUTO_TX1 */
#define MAX_FRAME_RETRIES(x)   ((x) & 0xF)
#define MAX_CCA_RETRIES(x)     (((x) & 0x7) << 4)

/* REG_AUTO_TX2 */
#define CSMA_MAX_BE(x)	       ((x) & 0xF)
#define CSMA_MIN_BE(x)	       (((x) & 0xF) << 4)

#define CMD_SPI_NOP		0xFF /* No operation. Use for dummy writes */
#define CMD_SPI_PKT_WR		0x10 /* Write telegram to the Packet RAM
				      * starting from the TX packet base address
				      * pointer tx_packet_base
				      */
#define CMD_SPI_PKT_RD		0x30 /* Read telegram from the Packet RAM
				      * starting from RX packet base address
				      * pointer rxpb.rx_packet_base
				      */
#define CMD_SPI_MEM_WR(x)	(0x18 + (x >> 8)) /* Write data to MCR or
						   * Packet RAM sequentially
						   */
#define CMD_SPI_MEM_RD(x)	(0x38 + (x >> 8)) /* Read data from MCR or
						   * Packet RAM sequentially
						   */
#define CMD_SPI_MEMR_WR(x)	(0x08 + (x >> 8)) /* Write data to MCR or Packet
						   * RAM as random block
						   */
#define CMD_SPI_MEMR_RD(x)	(0x28 + (x >> 8)) /* Read data from MCR or
						   * Packet RAM random block
						   */
#define CMD_SPI_PRAM_WR		0x1E /* Write data sequentially to current
				      * PRAM page selected
				      */
#define CMD_SPI_PRAM_RD		0x3E /* Read data sequentially from current
				      * PRAM page selected
				      */
#define CMD_RC_SLEEP		0xB1 /* Invoke transition of radio controller
				      * into SLEEP state
				      */
#define CMD_RC_IDLE		0xB2 /* Invoke transition of radio controller
				      * into IDLE state
				      */
#define CMD_RC_PHY_RDY		0xB3 /* Invoke transition of radio controller
				      * into PHY_RDY state
				      */
#define CMD_RC_RX		0xB4 /* Invoke transition of radio controller
				      * into RX state
				      */
#define CMD_RC_TX		0xB5 /* Invoke transition of radio controller
				      * into TX state
				      */
#define CMD_RC_MEAS		0xB6 /* Invoke transition of radio controller
				      * into MEAS state
				      */
#define CMD_RC_CCA		0xB7 /* Invoke Clear channel assessment */
#define CMD_RC_CSMACA		0xC1 /* initiates CSMA-CA channel access
				      * sequence and frame transmission
				      */
#define CMD_RC_PC_RESET		0xC7 /* Program counter reset */
#define CMD_RC_RESET		0xC8 /* Resets the ADF7242 and puts it in
				      * the sleep state
				      */
#define CMD_RC_PC_RESET_NO_WAIT (CMD_RC_PC_RESET | BIT(31))

/* STATUS */

#define STAT_SPI_READY		BIT(7)
#define STAT_IRQ_STATUS		BIT(6)
#define STAT_RC_READY		BIT(5)
#define STAT_CCA_RESULT		BIT(4)
#define RC_STATUS_IDLE		1
#define RC_STATUS_MEAS		2
#define RC_STATUS_PHY_RDY	3
#define RC_STATUS_RX		4
#define RC_STATUS_TX		5
#define RC_STATUS_MASK		0xF

/* AUTO_STATUS */

#define SUCCESS			0
#define SUCCESS_DATPEND		1
#define FAILURE_CSMACA		2
#define FAILURE_NOACK		3
#define AUTO_STATUS_MASK	0x3

#define PRAM_PAGESIZE		256

/* IRQ1 */

#define IRQ_CCA_COMPLETE	BIT(0)
#define IRQ_SFD_RX		BIT(1)
#define IRQ_SFD_TX		BIT(2)
#define IRQ_RX_PKT_RCVD		BIT(3)
#define IRQ_TX_PKT_SENT		BIT(4)
#define IRQ_FRAME_VALID		BIT(5)
#define IRQ_ADDRESS_VALID	BIT(6)
#define IRQ_CSMA_CA		BIT(7)

#define AUTO_TX_TURNAROUND	BIT(3)
#define ADDON_EN		BIT(4)

#define FLAG_XMIT		0
#define FLAG_START		1

#define ADF7242_REPORT_CSMA_CA_STAT 0 /* framework doesn't handle yet */

struct adf7242_local {
	struct spi_device *spi;
	struct completion tx_complete;
	struct ieee802154_hw *hw;
	struct mutex bmux; /* protect SPI messages */
	struct spi_message stat_msg;
	struct spi_transfer stat_xfer;
	struct dentry *debugfs_root;
	unsigned long flags;
	int tx_stat;
	bool promiscuous;
	s8 rssi;
	u8 max_frame_retries;
	u8 max_cca_retries;
	u8 max_be;
	u8 min_be;

	/* DMA (thus cache coherency maintenance) requires the
	 * transfer buffers to live in their own cache lines.
	 */

	u8 buf[3] ____cacheline_aligned;
	u8 buf_reg_tx[3];
	u8 buf_read_tx[4];
	u8 buf_read_rx[4];
	u8 buf_stat_rx;
	u8 buf_stat_tx;
	u8 buf_cmd;
};

static int adf7242_soft_reset(struct adf7242_local *lp, int line);

static int adf7242_status(struct adf7242_local *lp, u8 *stat)
{
	int status;

	mutex_lock(&lp->bmux);
	status = spi_sync(lp->spi, &lp->stat_msg);
	*stat = lp->buf_stat_rx;
	mutex_unlock(&lp->bmux);

	return status;
}

static int adf7242_wait_status(struct adf7242_local *lp, unsigned int status,
			       unsigned int mask, int line)
{
	int cnt = 0, ret = 0;
	u8 stat;

	do {
		adf7242_status(lp, &stat);
		cnt++;
	} while (((stat & mask) != status) && (cnt < MAX_POLL_LOOPS));

	if (cnt >= MAX_POLL_LOOPS) {
		ret = -ETIMEDOUT;

		if (!(stat & STAT_RC_READY)) {
			adf7242_soft_reset(lp, line);
			adf7242_status(lp, &stat);

			if ((stat & mask) == status)
				ret = 0;
		}

		if (ret < 0)
			dev_warn(&lp->spi->dev,
				 "%s:line %d Timeout status 0x%x (%d)\n",
				 __func__, line, stat, cnt);
	}

	dev_vdbg(&lp->spi->dev, "%s : loops=%d line %d\n", __func__, cnt, line);

	return ret;
}

static int adf7242_wait_ready(struct adf7242_local *lp, int line)
{
	return adf7242_wait_status(lp, STAT_RC_READY | STAT_SPI_READY,
				   STAT_RC_READY | STAT_SPI_READY, line);
}

static int adf7242_write_fbuf(struct adf7242_local *lp, u8 *data, u8 len)
{
	u8 *buf = lp->buf;
	int status;
	struct spi_message msg;
	struct spi_transfer xfer_head = {
		.len = 2,
		.tx_buf = buf,

	};
	struct spi_transfer xfer_buf = {
		.len = len,
		.tx_buf = data,
	};

	spi_message_init(&msg);
	spi_message_add_tail(&xfer_head, &msg);
	spi_message_add_tail(&xfer_buf, &msg);

	adf7242_wait_ready(lp, __LINE__);

	mutex_lock(&lp->bmux);
	buf[0] = CMD_SPI_PKT_WR;
	buf[1] = len + 2;

	status = spi_sync(lp->spi, &msg);
	mutex_unlock(&lp->bmux);

	return status;
}

static int adf7242_read_fbuf(struct adf7242_local *lp,
			     u8 *data, size_t len, bool packet_read)
{
	u8 *buf = lp->buf;
	int status;
	struct spi_message msg;
	struct spi_transfer xfer_head = {
		.len = 3,
		.tx_buf = buf,
		.rx_buf = buf,
	};
	struct spi_transfer xfer_buf = {
		.len = len,
		.rx_buf = data,
	};

	spi_message_init(&msg);
	spi_message_add_tail(&xfer_head, &msg);
	spi_message_add_tail(&xfer_buf, &msg);

	adf7242_wait_ready(lp, __LINE__);

	mutex_lock(&lp->bmux);
	if (packet_read) {
		buf[0] = CMD_SPI_PKT_RD;
		buf[1] = CMD_SPI_NOP;
		buf[2] = 0;	/* PHR */
	} else {
		buf[0] = CMD_SPI_PRAM_RD;
		buf[1] = 0;
		buf[2] = CMD_SPI_NOP;
	}

	status = spi_sync(lp->spi, &msg);

	mutex_unlock(&lp->bmux);

	return status;
}

static int adf7242_read_reg(struct adf7242_local *lp, u16 addr, u8 *data)
{
	int status;
	struct spi_message msg;

	struct spi_transfer xfer = {
		.len = 4,
		.tx_buf = lp->buf_read_tx,
		.rx_buf = lp->buf_read_rx,
	};

	adf7242_wait_ready(lp, __LINE__);

	mutex_lock(&lp->bmux);
	lp->buf_read_tx[0] = CMD_SPI_MEM_RD(addr);
	lp->buf_read_tx[1] = addr;
	lp->buf_read_tx[2] = CMD_SPI_NOP;
	lp->buf_read_tx[3] = CMD_SPI_NOP;

	spi_message_init(&msg);
	spi_message_add_tail(&xfer, &msg);

	status = spi_sync(lp->spi, &msg);
	if (msg.status)
		status = msg.status;

	if (!status)
		*data = lp->buf_read_rx[3];

	mutex_unlock(&lp->bmux);

	dev_vdbg(&lp->spi->dev, "%s : REG 0x%X, VAL 0x%X\n", __func__,
		 addr, *data);

	return status;
}

static int adf7242_write_reg(struct adf7242_local *lp, u16 addr, u8 data)
{
	int status;

	adf7242_wait_ready(lp, __LINE__);

	mutex_lock(&lp->bmux);
	lp->buf_reg_tx[0] = CMD_SPI_MEM_WR(addr);
	lp->buf_reg_tx[1] = addr;
	lp->buf_reg_tx[2] = data;
	status = spi_write(lp->spi, lp->buf_reg_tx, 3);
	mutex_unlock(&lp->bmux);

	dev_vdbg(&lp->spi->dev, "%s : REG 0x%X, VAL 0x%X\n",
		 __func__, addr, data);

	return status;
}

static int adf7242_cmd(struct adf7242_local *lp, unsigned int cmd)
{
	int status;

	dev_vdbg(&lp->spi->dev, "%s : CMD=0x%X\n", __func__, cmd);

	if (cmd != CMD_RC_PC_RESET_NO_WAIT)
		adf7242_wait_ready(lp, __LINE__);

	mutex_lock(&lp->bmux);
	lp->buf_cmd = cmd;
	status = spi_write(lp->spi, &lp->buf_cmd, 1);
	mutex_unlock(&lp->bmux);

	return status;
}

static int adf7242_upload_firmware(struct adf7242_local *lp, u8 *data, u16 len)
{
	struct spi_message msg;
	struct spi_transfer xfer_buf = { };
	int status, i, page = 0;
	u8 *buf = lp->buf;

	struct spi_transfer xfer_head = {
		.len = 2,
		.tx_buf = buf,
	};

	buf[0] = CMD_SPI_PRAM_WR;
	buf[1] = 0;

	spi_message_init(&msg);
	spi_message_add_tail(&xfer_head, &msg);
	spi_message_add_tail(&xfer_buf, &msg);

	for (i = len; i >= 0; i -= PRAM_PAGESIZE) {
		adf7242_write_reg(lp, REG_PRAMPG, page);

		xfer_buf.len = (i >= PRAM_PAGESIZE) ? PRAM_PAGESIZE : i;
		xfer_buf.tx_buf = &data[page * PRAM_PAGESIZE];

		mutex_lock(&lp->bmux);
		status = spi_sync(lp->spi, &msg);
		mutex_unlock(&lp->bmux);
		page++;
	}

	return status;
}

static int adf7242_verify_firmware(struct adf7242_local *lp,
				   const u8 *data, size_t len)
{
#ifdef DEBUG
	int i, j;
	unsigned int page;
	u8 *buf = kmalloc(PRAM_PAGESIZE, GFP_KERNEL);

	if (!buf)
		return -ENOMEM;

	for (page = 0, i = len; i >= 0; i -= PRAM_PAGESIZE, page++) {
		size_t nb = (i >= PRAM_PAGESIZE) ? PRAM_PAGESIZE : i;

		adf7242_write_reg(lp, REG_PRAMPG, page);
		adf7242_read_fbuf(lp, buf, nb, false);

		for (j = 0; j < nb; j++) {
			if (buf[j] != data[page * PRAM_PAGESIZE + j]) {
				kfree(buf);
				return -EIO;
			}
		}
	}
	kfree(buf);
#endif
	return 0;
}

static int adf7242_set_txpower(struct ieee802154_hw *hw, int mbm)
{
	struct adf7242_local *lp = hw->priv;
	u8 pwr, bias_ctrl, dbias, tmp;
	int db = mbm / 100;

	dev_vdbg(&lp->spi->dev, "%s : Power %d dB\n", __func__, db);

	if (db > 5 || db < -26)
		return -EINVAL;

	db = DIV_ROUND_CLOSEST(db + 29, 2);

	if (db > 15) {
		dbias = PA_DBIAS_HIGH_POWER;
		bias_ctrl = PA_BIAS_HIGH_POWER;
	} else {
		dbias = PA_DBIAS_LOW_POWER;
		bias_ctrl = PA_BIAS_LOW_POWER;
	}

	pwr = clamp_t(u8, db, 3, 15);

	adf7242_read_reg(lp, REG_PA_CFG, &tmp);
	tmp &= ~PA_BRIDGE_DBIAS(~0);
	tmp |= PA_BRIDGE_DBIAS(dbias);
	adf7242_write_reg(lp, REG_PA_CFG, tmp);

	adf7242_read_reg(lp, REG_PA_BIAS, &tmp);
	tmp &= ~PA_BIAS_CTRL(~0);
	tmp |= PA_BIAS_CTRL(bias_ctrl);
	adf7242_write_reg(lp, REG_PA_BIAS, tmp);

	adf7242_read_reg(lp, REG_EXTPA_MSC, &tmp);
	tmp &= ~PA_PWR(~0);
	tmp |= PA_PWR(pwr);

	return adf7242_write_reg(lp, REG_EXTPA_MSC, tmp);
}

static int adf7242_set_csma_params(struct ieee802154_hw *hw, u8 min_be,
				   u8 max_be, u8 retries)
{
	struct adf7242_local *lp = hw->priv;
	int ret;

	dev_vdbg(&lp->spi->dev, "%s : min_be=%d max_be=%d retries=%d\n",
		 __func__, min_be, max_be, retries);

	if (min_be > max_be || max_be > 8 || retries > 5)
		return -EINVAL;

	ret = adf7242_write_reg(lp, REG_AUTO_TX1,
				MAX_FRAME_RETRIES(lp->max_frame_retries) |
				MAX_CCA_RETRIES(retries));
	if (ret)
		return ret;

	lp->max_cca_retries = retries;
	lp->max_be = max_be;
	lp->min_be = min_be;

	return adf7242_write_reg(lp, REG_AUTO_TX2, CSMA_MAX_BE(max_be) |
			CSMA_MIN_BE(min_be));
}

static int adf7242_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
{
	struct adf7242_local *lp = hw->priv;
	int ret = 0;

	dev_vdbg(&lp->spi->dev, "%s : Retries = %d\n", __func__, retries);

	if (retries < -1 || retries > 15)
		return -EINVAL;

	if (retries >= 0)
		ret = adf7242_write_reg(lp, REG_AUTO_TX1,
					MAX_FRAME_RETRIES(retries) |
					MAX_CCA_RETRIES(lp->max_cca_retries));

	lp->max_frame_retries = retries;

	return ret;
}

static int adf7242_ed(struct ieee802154_hw *hw, u8 *level)
{
	struct adf7242_local *lp = hw->priv;

	*level = lp->rssi;

	dev_vdbg(&lp->spi->dev, "%s :Exit level=%d\n",
		 __func__, *level);

	return 0;
}

static int adf7242_start(struct ieee802154_hw *hw)
{
	struct adf7242_local *lp = hw->priv;

	adf7242_cmd(lp, CMD_RC_PHY_RDY);
	adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF);
	enable_irq(lp->spi->irq);
	set_bit(FLAG_START, &lp->flags);

	return adf7242_cmd(lp, CMD_RC_RX);
}

static void adf7242_stop(struct ieee802154_hw *hw)
{
	struct adf7242_local *lp = hw->priv;

	adf7242_cmd(lp, CMD_RC_IDLE);
	clear_bit(FLAG_START, &lp->flags);
	disable_irq(lp->spi->irq);
	adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF);
}

static int adf7242_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
{
	struct adf7242_local *lp = hw->priv;
	unsigned long freq;

	dev_dbg(&lp->spi->dev, "%s :Channel=%d\n", __func__, channel);

	might_sleep();

	WARN_ON(page != 0);
	WARN_ON(channel < 11);
	WARN_ON(channel > 26);

	freq = (2405 + 5 * (channel - 11)) * 100;
	adf7242_cmd(lp, CMD_RC_PHY_RDY);

	adf7242_write_reg(lp, REG_CH_FREQ0, freq);
	adf7242_write_reg(lp, REG_CH_FREQ1, freq >> 8);
	adf7242_write_reg(lp, REG_CH_FREQ2, freq >> 16);

	return adf7242_cmd(lp, CMD_RC_RX);
}

static int adf7242_set_hw_addr_filt(struct ieee802154_hw *hw,
				    struct ieee802154_hw_addr_filt *filt,
				    unsigned long changed)
{
	struct adf7242_local *lp = hw->priv;
	u8 reg;

	dev_dbg(&lp->spi->dev, "%s :Changed=0x%lX\n", __func__, changed);

	might_sleep();

	if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
		u8 addr[8], i;

		memcpy(addr, &filt->ieee_addr, 8);

		for (i = 0; i < 8; i++)
			adf7242_write_reg(lp, REG_IEEE_ADDR_0 + i, addr[i]);
	}

	if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
		u16 saddr = le16_to_cpu(filt->short_addr);

		adf7242_write_reg(lp, REG_SHORT_ADDR_0, saddr);
		adf7242_write_reg(lp, REG_SHORT_ADDR_1, saddr >> 8);
	}

	if (changed & IEEE802154_AFILT_PANID_CHANGED) {
		u16 pan_id = le16_to_cpu(filt->pan_id);

		adf7242_write_reg(lp, REG_PAN_ID0, pan_id);
		adf7242_write_reg(lp, REG_PAN_ID1, pan_id >> 8);
	}

	if (changed & IEEE802154_AFILT_PANC_CHANGED) {
		adf7242_read_reg(lp, REG_AUTO_CFG, &reg);
		if (filt->pan_coord)
			reg |= IS_PANCOORD;
		else
			reg &= ~IS_PANCOORD;
		adf7242_write_reg(lp, REG_AUTO_CFG, reg);
	}

	return 0;
}

static int adf7242_set_promiscuous_mode(struct ieee802154_hw *hw, bool on)
{
	struct adf7242_local *lp = hw->priv;

	dev_dbg(&lp->spi->dev, "%s : mode %d\n", __func__, on);

	lp->promiscuous = on;

	if (on) {
		adf7242_write_reg(lp, REG_AUTO_CFG, 0);
		return adf7242_write_reg(lp, REG_FFILT_CFG,
				  ACCEPT_BEACON_FRAMES |
				  ACCEPT_DATA_FRAMES |
				  ACCEPT_MACCMD_FRAMES |
				  ACCEPT_ALL_ADDRESS |
				  ACCEPT_ACK_FRAMES |
				  ACCEPT_RESERVED_FRAMES);
	} else {
		adf7242_write_reg(lp, REG_FFILT_CFG,
				  ACCEPT_BEACON_FRAMES |
				  ACCEPT_DATA_FRAMES |
				  ACCEPT_MACCMD_FRAMES |
				  ACCEPT_RESERVED_FRAMES);

		return adf7242_write_reg(lp, REG_AUTO_CFG, RX_AUTO_ACK_EN);
	}
}

static int adf7242_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
{
	struct adf7242_local *lp = hw->priv;
	s8 level = clamp_t(s8, mbm / 100, S8_MIN, S8_MAX);

	dev_dbg(&lp->spi->dev, "%s : level %d\n", __func__, level);

	return adf7242_write_reg(lp, REG_CCA1, level);
}

static int adf7242_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
{
	struct adf7242_local *lp = hw->priv;
	int ret;

	set_bit(FLAG_XMIT, &lp->flags);
	reinit_completion(&lp->tx_complete);
	adf7242_cmd(lp, CMD_RC_PHY_RDY);

	ret = adf7242_write_fbuf(lp, skb->data, skb->len);
	if (ret)
		goto err;

	ret = adf7242_cmd(lp, CMD_RC_CSMACA);
	if (ret)
		goto err;

	ret = wait_for_completion_interruptible_timeout(&lp->tx_complete,
							HZ / 10);
	if (ret < 0)
		goto err;
	if (ret == 0) {
		dev_dbg(&lp->spi->dev, "Timeout waiting for TX interrupt\n");
		ret = -ETIMEDOUT;
		goto err;
	}

	if (lp->tx_stat != SUCCESS) {
		dev_dbg(&lp->spi->dev,
			"Error xmit: Retry count exceeded Status=0x%x\n",
			lp->tx_stat);
		ret = -ECOMM;
	} else {
		ret = 0;
	}

err:
	clear_bit(FLAG_XMIT, &lp->flags);
	adf7242_cmd(lp, CMD_RC_RX);

	return ret;
}

static int adf7242_rx(struct adf7242_local *lp)
{
	struct sk_buff *skb;
	size_t len;
	int ret;
	u8 lqi, len_u8, *data;

	adf7242_read_reg(lp, 0, &len_u8);

	len = len_u8;

	if (!ieee802154_is_valid_psdu_len(len)) {
		dev_dbg(&lp->spi->dev,
			"corrupted frame received len %d\n", (int)len);
		len = IEEE802154_MTU;
	}

	skb = dev_alloc_skb(len);
	if (!skb) {
		adf7242_cmd(lp, CMD_RC_RX);
		return -ENOMEM;
	}

	data = skb_put(skb, len);
	ret = adf7242_read_fbuf(lp, data, len, true);
	if (ret < 0) {
		kfree_skb(skb);
		adf7242_cmd(lp, CMD_RC_RX);
		return ret;
	}

	lqi = data[len - 2];
	lp->rssi = data[len - 1];

	adf7242_cmd(lp, CMD_RC_RX);

	skb_trim(skb, len - 2);	/* Don't put RSSI/LQI or CRC into the frame */

	ieee802154_rx_irqsafe(lp->hw, skb, lqi);

	dev_dbg(&lp->spi->dev, "%s: ret=%d len=%d lqi=%d rssi=%d\n",
		__func__, ret, (int)len, (int)lqi, lp->rssi);

	return 0;
}

static const struct ieee802154_ops adf7242_ops = {
	.owner = THIS_MODULE,
	.xmit_sync = adf7242_xmit,
	.ed = adf7242_ed,
	.set_channel = adf7242_channel,
	.set_hw_addr_filt = adf7242_set_hw_addr_filt,
	.start = adf7242_start,
	.stop = adf7242_stop,
	.set_csma_params = adf7242_set_csma_params,
	.set_frame_retries = adf7242_set_frame_retries,
	.set_txpower = adf7242_set_txpower,
	.set_promiscuous_mode = adf7242_set_promiscuous_mode,
	.set_cca_ed_level = adf7242_set_cca_ed_level,
};

static void adf7242_debug(u8 irq1)
{
#ifdef DEBUG
	u8 stat;

	adf7242_status(lp, &stat);

	dev_dbg(&lp->spi->dev, "%s IRQ1 = %X:\n%s%s%s%s%s%s%s%s\n",
		__func__, irq1,
		irq1 & IRQ_CCA_COMPLETE ? "IRQ_CCA_COMPLETE\n" : "",
		irq1 & IRQ_SFD_RX ? "IRQ_SFD_RX\n" : "",
		irq1 & IRQ_SFD_TX ? "IRQ_SFD_TX\n" : "",
		irq1 & IRQ_RX_PKT_RCVD ? "IRQ_RX_PKT_RCVD\n" : "",
		irq1 & IRQ_TX_PKT_SENT ? "IRQ_TX_PKT_SENT\n" : "",
		irq1 & IRQ_CSMA_CA ? "IRQ_CSMA_CA\n" : "",
		irq1 & IRQ_FRAME_VALID ? "IRQ_FRAME_VALID\n" : "",
		irq1 & IRQ_ADDRESS_VALID ? "IRQ_ADDRESS_VALID\n" : "");

	dev_dbg(&lp->spi->dev, "%s STATUS = %X:\n%s\n%s%s%s%s%s\n",
		__func__, stat,
		stat & STAT_RC_READY ? "RC_READY" : "RC_BUSY",
		(stat & 0xf) == RC_STATUS_IDLE ? "RC_STATUS_IDLE" : "",
		(stat & 0xf) == RC_STATUS_MEAS ? "RC_STATUS_MEAS" : "",
		(stat & 0xf) == RC_STATUS_PHY_RDY ? "RC_STATUS_PHY_RDY" : "",
		(stat & 0xf) == RC_STATUS_RX ? "RC_STATUS_RX" : "",
		(stat & 0xf) == RC_STATUS_TX ? "RC_STATUS_TX" : "");
#endif
}

static irqreturn_t adf7242_isr(int irq, void *data)
{
	struct adf7242_local *lp = data;
	unsigned int xmit;
	u8 irq1;

	adf7242_wait_status(lp, RC_STATUS_PHY_RDY, RC_STATUS_MASK, __LINE__);

	adf7242_read_reg(lp, REG_IRQ1_SRC1, &irq1);
	adf7242_write_reg(lp, REG_IRQ1_SRC1, irq1);

	if (!(irq1 & (IRQ_RX_PKT_RCVD | IRQ_CSMA_CA)))
		dev_err(&lp->spi->dev, "%s :ERROR IRQ1 = 0x%X\n",
			__func__, irq1);

	adf7242_debug(irq1);

	xmit = test_bit(FLAG_XMIT, &lp->flags);

	if (xmit && (irq1 & IRQ_CSMA_CA)) {
		if (ADF7242_REPORT_CSMA_CA_STAT) {
			u8 astat;

			adf7242_read_reg(lp, REG_AUTO_STATUS, &astat);
			astat &= AUTO_STATUS_MASK;

			dev_dbg(&lp->spi->dev, "AUTO_STATUS = %X:\n%s%s%s%s\n",
				astat,
				astat == SUCCESS ? "SUCCESS" : "",
				astat ==
				SUCCESS_DATPEND ? "SUCCESS_DATPEND" : "",
				astat == FAILURE_CSMACA ? "FAILURE_CSMACA" : "",
				astat == FAILURE_NOACK ? "FAILURE_NOACK" : "");

			/* save CSMA-CA completion status */
			lp->tx_stat = astat;
		} else {
			lp->tx_stat = SUCCESS;
		}
		complete(&lp->tx_complete);
	} else if (!xmit && (irq1 & IRQ_RX_PKT_RCVD) &&
		   (irq1 & IRQ_FRAME_VALID)) {
		adf7242_rx(lp);
	} else if (!xmit && test_bit(FLAG_START, &lp->flags)) {
		/* Invalid packet received - drop it and restart */
		dev_dbg(&lp->spi->dev, "%s:%d : ERROR IRQ1 = 0x%X\n",
			__func__, __LINE__, irq1);
		adf7242_cmd(lp, CMD_RC_PHY_RDY);
		adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF);
		adf7242_cmd(lp, CMD_RC_RX);
	} else {
		/* This can only be xmit without IRQ, likely a RX packet.
		 * we get an TX IRQ shortly - do nothing or let the xmit
		 * timeout handle this
		 */
		dev_dbg(&lp->spi->dev, "%s:%d : ERROR IRQ1 = 0x%X, xmit %d\n",
			__func__, __LINE__, irq1, xmit);
		complete(&lp->tx_complete);
	}

	return IRQ_HANDLED;
}

static int adf7242_soft_reset(struct adf7242_local *lp, int line)
{
	dev_warn(&lp->spi->dev, "%s (line %d)\n", __func__, line);

	if (test_bit(FLAG_START, &lp->flags))
		disable_irq_nosync(lp->spi->irq);

	adf7242_cmd(lp, CMD_RC_PC_RESET_NO_WAIT);
	usleep_range(200, 250);
	adf7242_write_reg(lp, REG_PKT_CFG, ADDON_EN | BIT(2));
	adf7242_cmd(lp, CMD_RC_PHY_RDY);
	adf7242_set_promiscuous_mode(lp->hw, lp->promiscuous);
	adf7242_set_csma_params(lp->hw, lp->min_be, lp->max_be,
				lp->max_cca_retries);
	adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF);

	if (test_bit(FLAG_START, &lp->flags)) {
		enable_irq(lp->spi->irq);
		return adf7242_cmd(lp, CMD_RC_RX);
	}

	return 0;
}

static int adf7242_hw_init(struct adf7242_local *lp)
{
	int ret;
	const struct firmware *fw;

	adf7242_cmd(lp, CMD_RC_RESET);
	adf7242_cmd(lp, CMD_RC_IDLE);

	/* get ADF7242 addon firmware
	 * build this driver as module
	 * and place under /lib/firmware/adf7242_firmware.bin
	 * or compile firmware into the kernel.
	 */
	ret = request_firmware(&fw, FIRMWARE, &lp->spi->dev);
	if (ret) {
		dev_err(&lp->spi->dev,
			"request_firmware() failed with %d\n", ret);
		return ret;
	}

	ret = adf7242_upload_firmware(lp, (u8 *)fw->data, fw->size);
	if (ret) {
		dev_err(&lp->spi->dev,
			"upload firmware failed with %d\n", ret);
		release_firmware(fw);
		return ret;
	}

	ret = adf7242_verify_firmware(lp, (u8 *)fw->data, fw->size);
	if (ret) {
		dev_err(&lp->spi->dev,
			"verify firmware failed with %d\n", ret);
		release_firmware(fw);
		return ret;
	}

	adf7242_cmd(lp, CMD_RC_PC_RESET);

	release_firmware(fw);

	adf7242_write_reg(lp, REG_FFILT_CFG,
			  ACCEPT_BEACON_FRAMES |
			  ACCEPT_DATA_FRAMES |
			  ACCEPT_MACCMD_FRAMES |
			  ACCEPT_RESERVED_FRAMES);

	adf7242_write_reg(lp, REG_AUTO_CFG, RX_AUTO_ACK_EN);

	adf7242_write_reg(lp, REG_PKT_CFG, ADDON_EN | BIT(2));

	adf7242_write_reg(lp, REG_EXTPA_MSC, 0xF1);
	adf7242_write_reg(lp, REG_RXFE_CFG, 0x1D);

	adf7242_write_reg(lp, REG_IRQ1_EN0, 0);
	adf7242_write_reg(lp, REG_IRQ1_EN1, IRQ_RX_PKT_RCVD | IRQ_CSMA_CA);

	adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF);
	adf7242_write_reg(lp, REG_IRQ1_SRC0, 0xFF);

	adf7242_cmd(lp, CMD_RC_IDLE);

	return 0;
}

static int adf7242_stats_show(struct seq_file *file, void *offset)
{
	struct adf7242_local *lp = spi_get_drvdata(file->private);
	u8 stat, irq1;

	adf7242_status(lp, &stat);
	adf7242_read_reg(lp, REG_IRQ1_SRC1, &irq1);

	seq_printf(file, "IRQ1 = %X:\n%s%s%s%s%s%s%s%s\n", irq1,
		   irq1 & IRQ_CCA_COMPLETE ? "IRQ_CCA_COMPLETE\n" : "",
		   irq1 & IRQ_SFD_RX ? "IRQ_SFD_RX\n" : "",
		   irq1 & IRQ_SFD_TX ? "IRQ_SFD_TX\n" : "",
		   irq1 & IRQ_RX_PKT_RCVD ? "IRQ_RX_PKT_RCVD\n" : "",
		   irq1 & IRQ_TX_PKT_SENT ? "IRQ_TX_PKT_SENT\n" : "",
		   irq1 & IRQ_CSMA_CA ? "IRQ_CSMA_CA\n" : "",
		   irq1 & IRQ_FRAME_VALID ? "IRQ_FRAME_VALID\n" : "",
		   irq1 & IRQ_ADDRESS_VALID ? "IRQ_ADDRESS_VALID\n" : "");

	seq_printf(file, "STATUS = %X:\n%s\n%s%s%s%s%s\n", stat,
		   stat & STAT_RC_READY ? "RC_READY" : "RC_BUSY",
		   (stat & 0xf) == RC_STATUS_IDLE ? "RC_STATUS_IDLE" : "",
		   (stat & 0xf) == RC_STATUS_MEAS ? "RC_STATUS_MEAS" : "",
		   (stat & 0xf) == RC_STATUS_PHY_RDY ? "RC_STATUS_PHY_RDY" : "",
		   (stat & 0xf) == RC_STATUS_RX ? "RC_STATUS_RX" : "",
		   (stat & 0xf) == RC_STATUS_TX ? "RC_STATUS_TX" : "");

	seq_printf(file, "RSSI = %d\n", lp->rssi);

	return 0;
}

static int adf7242_debugfs_init(struct adf7242_local *lp)
{
	char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "adf7242-";
	struct dentry *stats;

	strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN);

	lp->debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
	if (IS_ERR_OR_NULL(lp->debugfs_root))
		return PTR_ERR_OR_ZERO(lp->debugfs_root);

	stats = debugfs_create_devm_seqfile(&lp->spi->dev, "status",
					    lp->debugfs_root,
					    adf7242_stats_show);
	return PTR_ERR_OR_ZERO(stats);

	return 0;
}

static const s32 adf7242_powers[] = {
	500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700,
	-800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700,
	-1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600,
};

static const s32 adf7242_ed_levels[] = {
	-9000, -8900, -8800, -8700, -8600, -8500, -8400, -8300, -8200, -8100,
	-8000, -7900, -7800, -7700, -7600, -7500, -7400, -7300, -7200, -7100,
	-7000, -6900, -6800, -6700, -6600, -6500, -6400, -6300, -6200, -6100,
	-6000, -5900, -5800, -5700, -5600, -5500, -5400, -5300, -5200, -5100,
	-5000, -4900, -4800, -4700, -4600, -4500, -4400, -4300, -4200, -4100,
	-4000, -3900, -3800, -3700, -3600, -3500, -3400, -3200, -3100, -3000
};

static int adf7242_probe(struct spi_device *spi)
{
	struct ieee802154_hw *hw;
	struct adf7242_local *lp;
	int ret, irq_type;

	if (!spi->irq) {
		dev_err(&spi->dev, "no IRQ specified\n");
		return -EINVAL;
	}

	hw = ieee802154_alloc_hw(sizeof(*lp), &adf7242_ops);
	if (!hw)
		return -ENOMEM;

	lp = hw->priv;
	lp->hw = hw;
	lp->spi = spi;

	hw->priv = lp;
	hw->parent = &spi->dev;
	hw->extra_tx_headroom = 0;

	/* We support only 2.4 Ghz */
	hw->phy->supported.channels[0] = 0x7FFF800;

	hw->flags = IEEE802154_HW_OMIT_CKSUM |
		    IEEE802154_HW_CSMA_PARAMS |
		    IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT |
		    IEEE802154_HW_PROMISCUOUS;

	hw->phy->flags = WPAN_PHY_FLAG_TXPOWER |
			 WPAN_PHY_FLAG_CCA_ED_LEVEL |
			 WPAN_PHY_FLAG_CCA_MODE;

	hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY);

	hw->phy->supported.cca_ed_levels = adf7242_ed_levels;
	hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(adf7242_ed_levels);

	hw->phy->cca.mode = NL802154_CCA_ENERGY;

	hw->phy->supported.tx_powers = adf7242_powers;
	hw->phy->supported.tx_powers_size = ARRAY_SIZE(adf7242_powers);

	hw->phy->supported.min_minbe = 0;
	hw->phy->supported.max_minbe = 8;

	hw->phy->supported.min_maxbe = 3;
	hw->phy->supported.max_maxbe = 8;

	hw->phy->supported.min_frame_retries = 0;
	hw->phy->supported.max_frame_retries = 15;

	hw->phy->supported.min_csma_backoffs = 0;
	hw->phy->supported.max_csma_backoffs = 5;

	ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);

	mutex_init(&lp->bmux);
	init_completion(&lp->tx_complete);

	/* Setup Status Message */
	lp->stat_xfer.len = 1;
	lp->stat_xfer.tx_buf = &lp->buf_stat_tx;
	lp->stat_xfer.rx_buf = &lp->buf_stat_rx;
	lp->buf_stat_tx = CMD_SPI_NOP;

	spi_message_init(&lp->stat_msg);
	spi_message_add_tail(&lp->stat_xfer, &lp->stat_msg);

	spi_set_drvdata(spi, lp);

	ret = adf7242_hw_init(lp);
	if (ret)
		goto err_hw_init;

	irq_type = irq_get_trigger_type(spi->irq);
	if (!irq_type)
		irq_type = IRQF_TRIGGER_HIGH;

	ret = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, adf7242_isr,
					irq_type | IRQF_ONESHOT,
					dev_name(&spi->dev), lp);
	if (ret)
		goto err_hw_init;

	disable_irq(spi->irq);

	ret = ieee802154_register_hw(lp->hw);
	if (ret)
		goto err_hw_init;

	dev_set_drvdata(&spi->dev, lp);

	adf7242_debugfs_init(lp);

	dev_info(&spi->dev, "mac802154 IRQ-%d registered\n", spi->irq);

	return ret;

err_hw_init:
	mutex_destroy(&lp->bmux);
	ieee802154_free_hw(lp->hw);

	return ret;
}

static int adf7242_remove(struct spi_device *spi)
{
	struct adf7242_local *lp = spi_get_drvdata(spi);

	if (!IS_ERR_OR_NULL(lp->debugfs_root))
		debugfs_remove_recursive(lp->debugfs_root);

	ieee802154_unregister_hw(lp->hw);
	mutex_destroy(&lp->bmux);
	ieee802154_free_hw(lp->hw);

	return 0;
}

static const struct of_device_id adf7242_of_match[] = {
	{ .compatible = "adi,adf7242", },
	{ },
};
MODULE_DEVICE_TABLE(of, adf7242_of_match);

static const struct spi_device_id adf7242_device_id[] = {
	{ .name = "adf7242", },
	{ },
};
MODULE_DEVICE_TABLE(spi, adf7242_device_id);

static struct spi_driver adf7242_driver = {
	.id_table = adf7242_device_id,
	.driver = {
		   .of_match_table = of_match_ptr(adf7242_of_match),
		   .name = "adf7242",
		   .owner = THIS_MODULE,
		   },
	.probe = adf7242_probe,
	.remove = adf7242_remove,
};

module_spi_driver(adf7242_driver);

MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
MODULE_DESCRIPTION("ADF7242 IEEE802.15.4 Transceiver Driver");
MODULE_LICENSE("GPL");