summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/mwifiex/debugfs.c
blob: 2713f7acd35e6d45081482c36b983a8a92af89a3 (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
/*
 * Marvell Wireless LAN device driver: debugfs
 *
 * Copyright (C) 2011-2014, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include <linux/debugfs.h>

#include "main.h"
#include "11n.h"


static struct dentry *mwifiex_dfs_dir;

static char *bss_modes[] = {
	"UNSPECIFIED",
	"ADHOC",
	"STATION",
	"AP",
	"AP_VLAN",
	"WDS",
	"MONITOR",
	"MESH_POINT",
	"P2P_CLIENT",
	"P2P_GO",
	"P2P_DEVICE",
};

/* size/addr for mwifiex_debug_info */
#define item_size(n)		(FIELD_SIZEOF(struct mwifiex_debug_info, n))
#define item_addr(n)		(offsetof(struct mwifiex_debug_info, n))

/* size/addr for struct mwifiex_adapter */
#define adapter_item_size(n)	(FIELD_SIZEOF(struct mwifiex_adapter, n))
#define adapter_item_addr(n)	(offsetof(struct mwifiex_adapter, n))

struct mwifiex_debug_data {
	char name[32];		/* variable/array name */
	u32 size;		/* size of the variable/array */
	size_t addr;		/* address of the variable/array */
	int num;		/* number of variables in an array */
};

static struct mwifiex_debug_data items[] = {
	{"int_counter", item_size(int_counter),
	 item_addr(int_counter), 1},
	{"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
	 item_addr(packets_out[WMM_AC_VO]), 1},
	{"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
	 item_addr(packets_out[WMM_AC_VI]), 1},
	{"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
	 item_addr(packets_out[WMM_AC_BE]), 1},
	{"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
	 item_addr(packets_out[WMM_AC_BK]), 1},
	{"tx_buf_size", item_size(tx_buf_size),
	 item_addr(tx_buf_size), 1},
	{"curr_tx_buf_size", item_size(curr_tx_buf_size),
	 item_addr(curr_tx_buf_size), 1},
	{"ps_mode", item_size(ps_mode),
	 item_addr(ps_mode), 1},
	{"ps_state", item_size(ps_state),
	 item_addr(ps_state), 1},
	{"is_deep_sleep", item_size(is_deep_sleep),
	 item_addr(is_deep_sleep), 1},
	{"wakeup_dev_req", item_size(pm_wakeup_card_req),
	 item_addr(pm_wakeup_card_req), 1},
	{"wakeup_tries", item_size(pm_wakeup_fw_try),
	 item_addr(pm_wakeup_fw_try), 1},
	{"hs_configured", item_size(is_hs_configured),
	 item_addr(is_hs_configured), 1},
	{"hs_activated", item_size(hs_activated),
	 item_addr(hs_activated), 1},
	{"num_tx_timeout", item_size(num_tx_timeout),
	 item_addr(num_tx_timeout), 1},
	{"is_cmd_timedout", item_size(is_cmd_timedout),
	 item_addr(is_cmd_timedout), 1},
	{"timeout_cmd_id", item_size(timeout_cmd_id),
	 item_addr(timeout_cmd_id), 1},
	{"timeout_cmd_act", item_size(timeout_cmd_act),
	 item_addr(timeout_cmd_act), 1},
	{"last_cmd_id", item_size(last_cmd_id),
	 item_addr(last_cmd_id), DBG_CMD_NUM},
	{"last_cmd_act", item_size(last_cmd_act),
	 item_addr(last_cmd_act), DBG_CMD_NUM},
	{"last_cmd_index", item_size(last_cmd_index),
	 item_addr(last_cmd_index), 1},
	{"last_cmd_resp_id", item_size(last_cmd_resp_id),
	 item_addr(last_cmd_resp_id), DBG_CMD_NUM},
	{"last_cmd_resp_index", item_size(last_cmd_resp_index),
	 item_addr(last_cmd_resp_index), 1},
	{"last_event", item_size(last_event),
	 item_addr(last_event), DBG_CMD_NUM},
	{"last_event_index", item_size(last_event_index),
	 item_addr(last_event_index), 1},
	{"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
	 item_addr(num_cmd_host_to_card_failure), 1},
	{"num_cmd_sleep_cfm_fail",
	 item_size(num_cmd_sleep_cfm_host_to_card_failure),
	 item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
	{"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
	 item_addr(num_tx_host_to_card_failure), 1},
	{"num_evt_deauth", item_size(num_event_deauth),
	 item_addr(num_event_deauth), 1},
	{"num_evt_disassoc", item_size(num_event_disassoc),
	 item_addr(num_event_disassoc), 1},
	{"num_evt_link_lost", item_size(num_event_link_lost),
	 item_addr(num_event_link_lost), 1},
	{"num_cmd_deauth", item_size(num_cmd_deauth),
	 item_addr(num_cmd_deauth), 1},
	{"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
	 item_addr(num_cmd_assoc_success), 1},
	{"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
	 item_addr(num_cmd_assoc_failure), 1},
	{"cmd_sent", item_size(cmd_sent),
	 item_addr(cmd_sent), 1},
	{"data_sent", item_size(data_sent),
	 item_addr(data_sent), 1},
	{"cmd_resp_received", item_size(cmd_resp_received),
	 item_addr(cmd_resp_received), 1},
	{"event_received", item_size(event_received),
	 item_addr(event_received), 1},

	/* variables defined in struct mwifiex_adapter */
	{"cmd_pending", adapter_item_size(cmd_pending),
	 adapter_item_addr(cmd_pending), 1},
	{"tx_pending", adapter_item_size(tx_pending),
	 adapter_item_addr(tx_pending), 1},
	{"rx_pending", adapter_item_size(rx_pending),
	 adapter_item_addr(rx_pending), 1},
};

static int num_of_items = ARRAY_SIZE(items);

/*
 * Proc info file read handler.
 *
 * This function is called when the 'info' file is opened for reading.
 * It prints the following driver related information -
 *      - Driver name
 *      - Driver version
 *      - Driver extended version
 *      - Interface name
 *      - BSS mode
 *      - Media state (connected or disconnected)
 *      - MAC address
 *      - Total number of Tx bytes
 *      - Total number of Rx bytes
 *      - Total number of Tx packets
 *      - Total number of Rx packets
 *      - Total number of dropped Tx packets
 *      - Total number of dropped Rx packets
 *      - Total number of corrupted Tx packets
 *      - Total number of corrupted Rx packets
 *      - Carrier status (on or off)
 *      - Tx queue status (started or stopped)
 *
 * For STA mode drivers, it also prints the following extra -
 *      - ESSID
 *      - BSSID
 *      - Channel
 *      - Region code
 *      - Multicast count
 *      - Multicast addresses
 */
static ssize_t
mwifiex_info_read(struct file *file, char __user *ubuf,
		  size_t count, loff_t *ppos)
{
	struct mwifiex_private *priv =
		(struct mwifiex_private *) file->private_data;
	struct net_device *netdev = priv->netdev;
	struct netdev_hw_addr *ha;
	struct netdev_queue *txq;
	unsigned long page = get_zeroed_page(GFP_KERNEL);
	char *p = (char *) page, fmt[64];
	struct mwifiex_bss_info info;
	ssize_t ret;
	int i = 0;

	if (!p)
		return -ENOMEM;

	memset(&info, 0, sizeof(info));
	ret = mwifiex_get_bss_info(priv, &info);
	if (ret)
		goto free_and_exit;

	mwifiex_drv_get_driver_version(priv->adapter, fmt, sizeof(fmt) - 1);

	if (!priv->version_str[0])
		mwifiex_get_ver_ext(priv);

	p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
	p += sprintf(p, "driver_version = %s", fmt);
	p += sprintf(p, "\nverext = %s", priv->version_str);
	p += sprintf(p, "\ninterface_name=\"%s\"\n", netdev->name);

	if (info.bss_mode >= ARRAY_SIZE(bss_modes))
		p += sprintf(p, "bss_mode=\"%d\"\n", info.bss_mode);
	else
		p += sprintf(p, "bss_mode=\"%s\"\n", bss_modes[info.bss_mode]);

	p += sprintf(p, "media_state=\"%s\"\n",
		     (!priv->media_connected ? "Disconnected" : "Connected"));
	p += sprintf(p, "mac_address=\"%pM\"\n", netdev->dev_addr);

	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
		p += sprintf(p, "multicast_count=\"%d\"\n",
			     netdev_mc_count(netdev));
		p += sprintf(p, "essid=\"%s\"\n", info.ssid.ssid);
		p += sprintf(p, "bssid=\"%pM\"\n", info.bssid);
		p += sprintf(p, "channel=\"%d\"\n", (int) info.bss_chan);
		p += sprintf(p, "country_code = \"%s\"\n", info.country_code);

		netdev_for_each_mc_addr(ha, netdev)
			p += sprintf(p, "multicast_address[%d]=\"%pM\"\n",
					i++, ha->addr);
	}

	p += sprintf(p, "num_tx_bytes = %lu\n", priv->stats.tx_bytes);
	p += sprintf(p, "num_rx_bytes = %lu\n", priv->stats.rx_bytes);
	p += sprintf(p, "num_tx_pkts = %lu\n", priv->stats.tx_packets);
	p += sprintf(p, "num_rx_pkts = %lu\n", priv->stats.rx_packets);
	p += sprintf(p, "num_tx_pkts_dropped = %lu\n", priv->stats.tx_dropped);
	p += sprintf(p, "num_rx_pkts_dropped = %lu\n", priv->stats.rx_dropped);
	p += sprintf(p, "num_tx_pkts_err = %lu\n", priv->stats.tx_errors);
	p += sprintf(p, "num_rx_pkts_err = %lu\n", priv->stats.rx_errors);
	p += sprintf(p, "carrier %s\n", ((netif_carrier_ok(priv->netdev))
					 ? "on" : "off"));
	p += sprintf(p, "tx queue");
	for (i = 0; i < netdev->num_tx_queues; i++) {
		txq = netdev_get_tx_queue(netdev, i);
		p += sprintf(p, " %d:%s", i, netif_tx_queue_stopped(txq) ?
			     "stopped" : "started");
	}
	p += sprintf(p, "\n");

	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
				      (unsigned long) p - page);

free_and_exit:
	free_page(page);
	return ret;
}

/*
 * Proc firmware dump read handler.
 *
 * This function is called when the 'fw_dump' file is opened for
 * reading.
 * This function dumps firmware memory in different files
 * (ex. DTCM, ITCM, SQRAM etc.) based on the the segments for
 * debugging.
 */
static ssize_t
mwifiex_fw_dump_read(struct file *file, char __user *ubuf,
		     size_t count, loff_t *ppos)
{
	struct mwifiex_private *priv = file->private_data;

	if (!priv->adapter->if_ops.fw_dump)
		return -EIO;

	priv->adapter->if_ops.fw_dump(priv->adapter);

	return 0;
}

/*
 * Proc getlog file read handler.
 *
 * This function is called when the 'getlog' file is opened for reading
 * It prints the following log information -
 *      - Number of multicast Tx frames
 *      - Number of failed packets
 *      - Number of Tx retries
 *      - Number of multicast Tx retries
 *      - Number of duplicate frames
 *      - Number of RTS successes
 *      - Number of RTS failures
 *      - Number of ACK failures
 *      - Number of fragmented Rx frames
 *      - Number of multicast Rx frames
 *      - Number of FCS errors
 *      - Number of Tx frames
 *      - WEP ICV error counts
 */
static ssize_t
mwifiex_getlog_read(struct file *file, char __user *ubuf,
		    size_t count, loff_t *ppos)
{
	struct mwifiex_private *priv =
		(struct mwifiex_private *) file->private_data;
	unsigned long page = get_zeroed_page(GFP_KERNEL);
	char *p = (char *) page;
	ssize_t ret;
	struct mwifiex_ds_get_stats stats;

	if (!p)
		return -ENOMEM;

	memset(&stats, 0, sizeof(stats));
	ret = mwifiex_get_stats_info(priv, &stats);
	if (ret)
		goto free_and_exit;

	p += sprintf(p, "\n"
		     "mcasttxframe     %u\n"
		     "failed           %u\n"
		     "retry            %u\n"
		     "multiretry       %u\n"
		     "framedup         %u\n"
		     "rtssuccess       %u\n"
		     "rtsfailure       %u\n"
		     "ackfailure       %u\n"
		     "rxfrag           %u\n"
		     "mcastrxframe     %u\n"
		     "fcserror         %u\n"
		     "txframe          %u\n"
		     "wepicverrcnt-1   %u\n"
		     "wepicverrcnt-2   %u\n"
		     "wepicverrcnt-3   %u\n"
		     "wepicverrcnt-4   %u\n",
		     stats.mcast_tx_frame,
		     stats.failed,
		     stats.retry,
		     stats.multi_retry,
		     stats.frame_dup,
		     stats.rts_success,
		     stats.rts_failure,
		     stats.ack_failure,
		     stats.rx_frag,
		     stats.mcast_rx_frame,
		     stats.fcs_error,
		     stats.tx_frame,
		     stats.wep_icv_error[0],
		     stats.wep_icv_error[1],
		     stats.wep_icv_error[2],
		     stats.wep_icv_error[3]);


	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
				      (unsigned long) p - page);

free_and_exit:
	free_page(page);
	return ret;
}

static struct mwifiex_debug_info info;

/*
 * Proc debug file read handler.
 *
 * This function is called when the 'debug' file is opened for reading
 * It prints the following log information -
 *      - Interrupt count
 *      - WMM AC VO packets count
 *      - WMM AC VI packets count
 *      - WMM AC BE packets count
 *      - WMM AC BK packets count
 *      - Maximum Tx buffer size
 *      - Tx buffer size
 *      - Current Tx buffer size
 *      - Power Save mode
 *      - Power Save state
 *      - Deep Sleep status
 *      - Device wakeup required status
 *      - Number of wakeup tries
 *      - Host Sleep configured status
 *      - Host Sleep activated status
 *      - Number of Tx timeouts
 *      - Number of command timeouts
 *      - Last timed out command ID
 *      - Last timed out command action
 *      - Last command ID
 *      - Last command action
 *      - Last command index
 *      - Last command response ID
 *      - Last command response index
 *      - Last event
 *      - Last event index
 *      - Number of host to card command failures
 *      - Number of sleep confirm command failures
 *      - Number of host to card data failure
 *      - Number of deauthentication events
 *      - Number of disassociation events
 *      - Number of link lost events
 *      - Number of deauthentication commands
 *      - Number of association success commands
 *      - Number of association failure commands
 *      - Number of commands sent
 *      - Number of data packets sent
 *      - Number of command responses received
 *      - Number of events received
 *      - Tx BA stream table (TID, RA)
 *      - Rx reorder table (TID, TA, Start window, Window size, Buffer)
 */
static ssize_t
mwifiex_debug_read(struct file *file, char __user *ubuf,
		   size_t count, loff_t *ppos)
{
	struct mwifiex_private *priv =
		(struct mwifiex_private *) file->private_data;
	struct mwifiex_debug_data *d = &items[0];
	unsigned long page = get_zeroed_page(GFP_KERNEL);
	char *p = (char *) page;
	ssize_t ret;
	size_t size, addr;
	long val;
	int i, j;

	if (!p)
		return -ENOMEM;

	ret = mwifiex_get_debug_info(priv, &info);
	if (ret)
		goto free_and_exit;

	for (i = 0; i < num_of_items; i++) {
		p += sprintf(p, "%s=", d[i].name);

		size = d[i].size / d[i].num;

		if (i < (num_of_items - 3))
			addr = d[i].addr + (size_t) &info;
		else /* The last 3 items are struct mwifiex_adapter variables */
			addr = d[i].addr + (size_t) priv->adapter;

		for (j = 0; j < d[i].num; j++) {
			switch (size) {
			case 1:
				val = *((u8 *) addr);
				break;
			case 2:
				val = *((u16 *) addr);
				break;
			case 4:
				val = *((u32 *) addr);
				break;
			case 8:
				val = *((long long *) addr);
				break;
			default:
				val = -1;
				break;
			}

			p += sprintf(p, "%#lx ", val);
			addr += size;
		}

		p += sprintf(p, "\n");
	}

	if (info.tx_tbl_num) {
		p += sprintf(p, "Tx BA stream table:\n");
		for (i = 0; i < info.tx_tbl_num; i++)
			p += sprintf(p, "tid = %d, ra = %pM\n",
				     info.tx_tbl[i].tid, info.tx_tbl[i].ra);
	}

	if (info.rx_tbl_num) {
		p += sprintf(p, "Rx reorder table:\n");
		for (i = 0; i < info.rx_tbl_num; i++) {
			p += sprintf(p, "tid = %d, ta = %pM, "
				     "start_win = %d, "
				     "win_size = %d, buffer: ",
				     info.rx_tbl[i].tid,
				     info.rx_tbl[i].ta,
				     info.rx_tbl[i].start_win,
				     info.rx_tbl[i].win_size);

			for (j = 0; j < info.rx_tbl[i].win_size; j++)
				p += sprintf(p, "%c ",
					     info.rx_tbl[i].buffer[j] ?
					     '1' : '0');

			p += sprintf(p, "\n");
		}
	}

	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
				      (unsigned long) p - page);

free_and_exit:
	free_page(page);
	return ret;
}

static u32 saved_reg_type, saved_reg_offset, saved_reg_value;

/*
 * Proc regrdwr file write handler.
 *
 * This function is called when the 'regrdwr' file is opened for writing
 *
 * This function can be used to write to a register.
 */
static ssize_t
mwifiex_regrdwr_write(struct file *file,
		      const char __user *ubuf, size_t count, loff_t *ppos)
{
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *) addr;
	size_t buf_size = min_t(size_t, count, PAGE_SIZE - 1);
	int ret;
	u32 reg_type = 0, reg_offset = 0, reg_value = UINT_MAX;

	if (!buf)
		return -ENOMEM;


	if (copy_from_user(buf, ubuf, buf_size)) {
		ret = -EFAULT;
		goto done;
	}

	sscanf(buf, "%u %x %x", &reg_type, &reg_offset, &reg_value);

	if (reg_type == 0 || reg_offset == 0) {
		ret = -EINVAL;
		goto done;
	} else {
		saved_reg_type = reg_type;
		saved_reg_offset = reg_offset;
		saved_reg_value = reg_value;
		ret = count;
	}
done:
	free_page(addr);
	return ret;
}

/*
 * Proc regrdwr file read handler.
 *
 * This function is called when the 'regrdwr' file is opened for reading
 *
 * This function can be used to read from a register.
 */
static ssize_t
mwifiex_regrdwr_read(struct file *file, char __user *ubuf,
		     size_t count, loff_t *ppos)
{
	struct mwifiex_private *priv =
		(struct mwifiex_private *) file->private_data;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *) addr;
	int pos = 0, ret = 0;
	u32 reg_value;

	if (!buf)
		return -ENOMEM;

	if (!saved_reg_type) {
		/* No command has been given */
		pos += snprintf(buf, PAGE_SIZE, "0");
		goto done;
	}
	/* Set command has been given */
	if (saved_reg_value != UINT_MAX) {
		ret = mwifiex_reg_write(priv, saved_reg_type, saved_reg_offset,
					saved_reg_value);

		pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n",
				saved_reg_type, saved_reg_offset,
				saved_reg_value);

		ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);

		goto done;
	}
	/* Get command has been given */
	ret = mwifiex_reg_read(priv, saved_reg_type,
			       saved_reg_offset, &reg_value);
	if (ret) {
		ret = -EINVAL;
		goto done;
	}

	pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", saved_reg_type,
			saved_reg_offset, reg_value);

	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);

done:
	free_page(addr);
	return ret;
}

static u32 saved_offset = -1, saved_bytes = -1;

/*
 * Proc rdeeprom file write handler.
 *
 * This function is called when the 'rdeeprom' file is opened for writing
 *
 * This function can be used to write to a RDEEPROM location.
 */
static ssize_t
mwifiex_rdeeprom_write(struct file *file,
		       const char __user *ubuf, size_t count, loff_t *ppos)
{
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *) addr;
	size_t buf_size = min_t(size_t, count, PAGE_SIZE - 1);
	int ret = 0;
	int offset = -1, bytes = -1;

	if (!buf)
		return -ENOMEM;


	if (copy_from_user(buf, ubuf, buf_size)) {
		ret = -EFAULT;
		goto done;
	}

	sscanf(buf, "%d %d", &offset, &bytes);

	if (offset == -1 || bytes == -1) {
		ret = -EINVAL;
		goto done;
	} else {
		saved_offset = offset;
		saved_bytes = bytes;
		ret = count;
	}
done:
	free_page(addr);
	return ret;
}

/*
 * Proc rdeeprom read write handler.
 *
 * This function is called when the 'rdeeprom' file is opened for reading
 *
 * This function can be used to read from a RDEEPROM location.
 */
static ssize_t
mwifiex_rdeeprom_read(struct file *file, char __user *ubuf,
		      size_t count, loff_t *ppos)
{
	struct mwifiex_private *priv =
		(struct mwifiex_private *) file->private_data;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *) addr;
	int pos = 0, ret = 0, i;
	u8 value[MAX_EEPROM_DATA];

	if (!buf)
		return -ENOMEM;

	if (saved_offset == -1) {
		/* No command has been given */
		pos += snprintf(buf, PAGE_SIZE, "0");
		goto done;
	}

	/* Get command has been given */
	ret = mwifiex_eeprom_read(priv, (u16) saved_offset,
				  (u16) saved_bytes, value);
	if (ret) {
		ret = -EINVAL;
		goto done;
	}

	pos += snprintf(buf, PAGE_SIZE, "%d %d ", saved_offset, saved_bytes);

	for (i = 0; i < saved_bytes; i++)
		pos += snprintf(buf + strlen(buf), PAGE_SIZE, "%d ", value[i]);

	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);

done:
	free_page(addr);
	return ret;
}

/* Proc hscfg file write handler
 * This function can be used to configure the host sleep parameters.
 */
static ssize_t
mwifiex_hscfg_write(struct file *file, const char __user *ubuf,
		    size_t count, loff_t *ppos)
{
	struct mwifiex_private *priv = (void *)file->private_data;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;
	size_t buf_size = min_t(size_t, count, PAGE_SIZE - 1);
	int ret, arg_num;
	struct mwifiex_ds_hs_cfg hscfg;
	int conditions = HS_CFG_COND_DEF;
	u32 gpio = HS_CFG_GPIO_DEF, gap = HS_CFG_GAP_DEF;

	if (!buf)
		return -ENOMEM;

	if (copy_from_user(buf, ubuf, buf_size)) {
		ret = -EFAULT;
		goto done;
	}

	arg_num = sscanf(buf, "%d %x %x", &conditions, &gpio, &gap);

	memset(&hscfg, 0, sizeof(struct mwifiex_ds_hs_cfg));

	if (arg_num > 3) {
		dev_err(priv->adapter->dev, "Too many arguments\n");
		ret = -EINVAL;
		goto done;
	}

	if (arg_num >= 1 && arg_num < 3)
		mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_GET,
				      MWIFIEX_SYNC_CMD, &hscfg);

	if (arg_num) {
		if (conditions == HS_CFG_CANCEL) {
			mwifiex_cancel_hs(priv, MWIFIEX_ASYNC_CMD);
			ret = count;
			goto done;
		}
		hscfg.conditions = conditions;
	}
	if (arg_num >= 2)
		hscfg.gpio = gpio;
	if (arg_num == 3)
		hscfg.gap = gap;

	hscfg.is_invoke_hostcmd = false;
	mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_SET,
			      MWIFIEX_SYNC_CMD, &hscfg);

	mwifiex_enable_hs(priv->adapter);
	priv->adapter->hs_enabling = false;
	ret = count;
done:
	free_page(addr);
	return ret;
}

/* Proc hscfg file read handler
 * This function can be used to read host sleep configuration
 * parameters from driver.
 */
static ssize_t
mwifiex_hscfg_read(struct file *file, char __user *ubuf,
		   size_t count, loff_t *ppos)
{
	struct mwifiex_private *priv = (void *)file->private_data;
	unsigned long addr = get_zeroed_page(GFP_KERNEL);
	char *buf = (char *)addr;
	int pos, ret;
	struct mwifiex_ds_hs_cfg hscfg;

	if (!buf)
		return -ENOMEM;

	mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_GET,
			      MWIFIEX_SYNC_CMD, &hscfg);

	pos = snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", hscfg.conditions,
		       hscfg.gpio, hscfg.gap);

	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);

	free_page(addr);
	return ret;
}

#define MWIFIEX_DFS_ADD_FILE(name) do {                                 \
	if (!debugfs_create_file(#name, 0644, priv->dfs_dev_dir,        \
			priv, &mwifiex_dfs_##name##_fops))              \
		return;                                                 \
} while (0);

#define MWIFIEX_DFS_FILE_OPS(name)                                      \
static const struct file_operations mwifiex_dfs_##name##_fops = {       \
	.read = mwifiex_##name##_read,                                  \
	.write = mwifiex_##name##_write,                                \
	.open = simple_open,                                            \
};

#define MWIFIEX_DFS_FILE_READ_OPS(name)                                 \
static const struct file_operations mwifiex_dfs_##name##_fops = {       \
	.read = mwifiex_##name##_read,                                  \
	.open = simple_open,                                            \
};

#define MWIFIEX_DFS_FILE_WRITE_OPS(name)                                \
static const struct file_operations mwifiex_dfs_##name##_fops = {       \
	.write = mwifiex_##name##_write,                                \
	.open = simple_open,                                            \
};


MWIFIEX_DFS_FILE_READ_OPS(info);
MWIFIEX_DFS_FILE_READ_OPS(debug);
MWIFIEX_DFS_FILE_READ_OPS(getlog);
MWIFIEX_DFS_FILE_READ_OPS(fw_dump);
MWIFIEX_DFS_FILE_OPS(regrdwr);
MWIFIEX_DFS_FILE_OPS(rdeeprom);
MWIFIEX_DFS_FILE_OPS(hscfg);

/*
 * This function creates the debug FS directory structure and the files.
 */
void
mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
{
	if (!mwifiex_dfs_dir || !priv)
		return;

	priv->dfs_dev_dir = debugfs_create_dir(priv->netdev->name,
					       mwifiex_dfs_dir);

	if (!priv->dfs_dev_dir)
		return;

	MWIFIEX_DFS_ADD_FILE(info);
	MWIFIEX_DFS_ADD_FILE(debug);
	MWIFIEX_DFS_ADD_FILE(getlog);
	MWIFIEX_DFS_ADD_FILE(regrdwr);
	MWIFIEX_DFS_ADD_FILE(rdeeprom);
	MWIFIEX_DFS_ADD_FILE(fw_dump);
	MWIFIEX_DFS_ADD_FILE(hscfg);
}

/*
 * This function removes the debug FS directory structure and the files.
 */
void
mwifiex_dev_debugfs_remove(struct mwifiex_private *priv)
{
	if (!priv)
		return;

	debugfs_remove_recursive(priv->dfs_dev_dir);
}

/*
 * This function creates the top level proc directory.
 */
void
mwifiex_debugfs_init(void)
{
	if (!mwifiex_dfs_dir)
		mwifiex_dfs_dir = debugfs_create_dir("mwifiex", NULL);
}

/*
 * This function removes the top level proc directory.
 */
void
mwifiex_debugfs_remove(void)
{
	if (mwifiex_dfs_dir)
		debugfs_remove(mwifiex_dfs_dir);
}