aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/radio/wl128x/fmdrv_rx.c
blob: 3dd9fc097c473f5974034fdce141079e242e915e (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
/*
 *  FM Driver for Connectivity chip of Texas Instruments.
 *  This sub-module of FM driver implements FM RX functionality.
 *
 *  Copyright (C) 2011 Texas Instruments
 *  Author: Raja Mani <raja_mani@ti.com>
 *  Author: Manjunatha Halli <manjunatha_halli@ti.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "fmdrv.h"
#include "fmdrv_common.h"
#include "fmdrv_rx.h"

void fm_rx_reset_rds_cache(struct fmdev *fmdev)
{
	fmdev->rx.rds.flag = FM_RDS_DISABLE;
	fmdev->rx.rds.last_blk_idx = 0;
	fmdev->rx.rds.wr_idx = 0;
	fmdev->rx.rds.rd_idx = 0;

	if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)
		fmdev->irq_info.mask |= FM_LEV_EVENT;
}

void fm_rx_reset_station_info(struct fmdev *fmdev)
{
	fmdev->rx.stat_info.picode = FM_NO_PI_CODE;
	fmdev->rx.stat_info.afcache_size = 0;
	fmdev->rx.stat_info.af_list_max = 0;
}

int fm_rx_set_freq(struct fmdev *fmdev, u32 freq)
{
	unsigned long timeleft;
	u16 payload, curr_frq, intr_flag;
	u32 curr_frq_in_khz;
	u32 resp_len;
	int ret;

	if (freq < fmdev->rx.region.bot_freq || freq > fmdev->rx.region.top_freq) {
		fmerr("Invalid frequency %d\n", freq);
		return -EINVAL;
	}

	/* Set audio enable */
	payload = FM_RX_AUDIO_ENABLE_I2S_AND_ANALOG;

	ret = fmc_send_cmd(fmdev, AUDIO_ENABLE_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Set hilo to automatic selection */
	payload = FM_RX_IFFREQ_HILO_AUTOMATIC;
	ret = fmc_send_cmd(fmdev, HILO_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Calculate frequency index and set*/
	payload = (freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;

	ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Read flags - just to clear any pending interrupts if we had */
	ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);
	if (ret < 0)
		return ret;

	/* Enable FR, BL interrupts */
	intr_flag = fmdev->irq_info.mask;
	fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);
	payload = fmdev->irq_info.mask;
	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Start tune */
	payload = FM_TUNER_PRESET_MODE;
	ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		goto exit;

	/* Wait for tune ended interrupt */
	init_completion(&fmdev->maintask_comp);
	timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
			FM_DRV_TX_TIMEOUT);
	if (!timeleft) {
		fmerr("Timeout(%d sec),didn't get tune ended int\n",
			   jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
		ret = -ETIMEDOUT;
		goto exit;
	}

	/* Read freq back to confirm */
	ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2, &curr_frq, &resp_len);
	if (ret < 0)
		goto exit;

	curr_frq = be16_to_cpu(curr_frq);
	curr_frq_in_khz = (fmdev->rx.region.bot_freq + ((u32)curr_frq * FM_FREQ_MUL));

	if (curr_frq_in_khz != freq) {
		pr_info("Frequency is set to (%d) but "
			   "requested freq is (%d)\n", curr_frq_in_khz, freq);
	}

	/* Update local cache  */
	fmdev->rx.freq = curr_frq_in_khz;
exit:
	/* Re-enable default FM interrupts */
	fmdev->irq_info.mask = intr_flag;
	payload = fmdev->irq_info.mask;
	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Reset RDS cache and current station pointers */
	fm_rx_reset_rds_cache(fmdev);
	fm_rx_reset_station_info(fmdev);

	return ret;
}

static int fm_rx_set_channel_spacing(struct fmdev *fmdev, u32 spacing)
{
	u16 payload;
	int ret;

	if (spacing > 0 && spacing <= 50000)
		spacing = FM_CHANNEL_SPACING_50KHZ;
	else if (spacing > 50000 && spacing <= 100000)
		spacing = FM_CHANNEL_SPACING_100KHZ;
	else
		spacing = FM_CHANNEL_SPACING_200KHZ;

	/* set channel spacing */
	payload = spacing;
	ret = fmc_send_cmd(fmdev, CHANL_BW_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	fmdev->rx.region.chanl_space = spacing * FM_FREQ_MUL;

	return ret;
}

int fm_rx_seek(struct fmdev *fmdev, u32 seek_upward,
		u32 wrap_around, u32 spacing)
{
	u32 resp_len;
	u16 curr_frq, next_frq, last_frq;
	u16 payload, int_reason, intr_flag;
	u16 offset, space_idx;
	unsigned long timeleft;
	int ret;

	/* Set channel spacing */
	ret = fm_rx_set_channel_spacing(fmdev, spacing);
	if (ret < 0) {
		fmerr("Failed to set channel spacing\n");
		return ret;
	}

	/* Read the current frequency from chip */
	ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL,
			sizeof(curr_frq), &curr_frq, &resp_len);
	if (ret < 0)
		return ret;

	curr_frq = be16_to_cpu(curr_frq);
	last_frq = (fmdev->rx.region.top_freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;

	/* Check the offset in order to be aligned to the channel spacing*/
	space_idx = fmdev->rx.region.chanl_space / FM_FREQ_MUL;
	offset = curr_frq % space_idx;

	next_frq = seek_upward ? curr_frq + space_idx /* Seek Up */ :
				curr_frq - space_idx /* Seek Down */ ;

	/*
	 * Add or subtract offset in order to stay aligned to the channel
	 * spacing.
	 */
	if ((short)next_frq < 0)
		next_frq = last_frq - offset;
	else if (next_frq > last_frq)
		next_frq = 0 + offset;

again:
	/* Set calculated next frequency to perform seek */
	payload = next_frq;
	ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Set search direction (0:Seek Down, 1:Seek Up) */
	payload = (seek_upward ? FM_SEARCH_DIRECTION_UP : FM_SEARCH_DIRECTION_DOWN);
	ret = fmc_send_cmd(fmdev, SEARCH_DIR_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Read flags - just to clear any pending interrupts if we had */
	ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);
	if (ret < 0)
		return ret;

	/* Enable FR, BL interrupts */
	intr_flag = fmdev->irq_info.mask;
	fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);
	payload = fmdev->irq_info.mask;
	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Start seek */
	payload = FM_TUNER_AUTONOMOUS_SEARCH_MODE;
	ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Wait for tune ended/band limit reached interrupt */
	init_completion(&fmdev->maintask_comp);
	timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
			FM_DRV_RX_SEEK_TIMEOUT);
	if (!timeleft) {
		fmerr("Timeout(%d sec),didn't get tune ended int\n",
			   jiffies_to_msecs(FM_DRV_RX_SEEK_TIMEOUT) / 1000);
		return -ENODATA;
	}

	int_reason = fmdev->irq_info.flag & (FM_TUNE_COMPLETE | FM_BAND_LIMIT);

	/* Re-enable default FM interrupts */
	fmdev->irq_info.mask = intr_flag;
	payload = fmdev->irq_info.mask;
	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	if (int_reason & FM_BL_EVENT) {
		if (wrap_around == 0) {
			fmdev->rx.freq = seek_upward ?
				fmdev->rx.region.top_freq :
				fmdev->rx.region.bot_freq;
		} else {
			fmdev->rx.freq = seek_upward ?
				fmdev->rx.region.bot_freq :
				fmdev->rx.region.top_freq;
			/* Calculate frequency index to write */
			next_frq = (fmdev->rx.freq -
					fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
			goto again;
		}
	} else {
		/* Read freq to know where operation tune operation stopped */
		ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2,
				&curr_frq, &resp_len);
		if (ret < 0)
			return ret;

		curr_frq = be16_to_cpu(curr_frq);
		fmdev->rx.freq = (fmdev->rx.region.bot_freq +
				((u32)curr_frq * FM_FREQ_MUL));

	}
	/* Reset RDS cache and current station pointers */
	fm_rx_reset_rds_cache(fmdev);
	fm_rx_reset_station_info(fmdev);

	return ret;
}

int fm_rx_set_volume(struct fmdev *fmdev, u16 vol_to_set)
{
	u16 payload;
	int ret;

	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (vol_to_set < FM_RX_VOLUME_MIN || vol_to_set > FM_RX_VOLUME_MAX) {
		fmerr("Volume is not within(%d-%d) range\n",
			   FM_RX_VOLUME_MIN, FM_RX_VOLUME_MAX);
		return -EINVAL;
	}
	vol_to_set *= FM_RX_VOLUME_GAIN_STEP;

	payload = vol_to_set;
	ret = fmc_send_cmd(fmdev, VOLUME_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	fmdev->rx.volume = vol_to_set;
	return ret;
}

/* Get volume */
int fm_rx_get_volume(struct fmdev *fmdev, u16 *curr_vol)
{
	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (curr_vol == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*curr_vol = fmdev->rx.volume / FM_RX_VOLUME_GAIN_STEP;

	return 0;
}

/* To get current band's bottom and top frequency */
int fm_rx_get_band_freq_range(struct fmdev *fmdev, u32 *bot_freq, u32 *top_freq)
{
	if (bot_freq != NULL)
		*bot_freq = fmdev->rx.region.bot_freq;

	if (top_freq != NULL)
		*top_freq = fmdev->rx.region.top_freq;

	return 0;
}

/* Returns current band index (0-Europe/US; 1-Japan) */
void fm_rx_get_region(struct fmdev *fmdev, u8 *region)
{
	*region = fmdev->rx.region.fm_band;
}

/* Sets band (0-Europe/US; 1-Japan) */
int fm_rx_set_region(struct fmdev *fmdev, u8 region_to_set)
{
	u16 payload;
	u32 new_frq = 0;
	int ret;

	if (region_to_set != FM_BAND_EUROPE_US &&
	    region_to_set != FM_BAND_JAPAN) {
		fmerr("Invalid band\n");
		return -EINVAL;
	}

	if (fmdev->rx.region.fm_band == region_to_set) {
		fmerr("Requested band is already configured\n");
		return 0;
	}

	/* Send cmd to set the band  */
	payload = (u16)region_to_set;
	ret = fmc_send_cmd(fmdev, BAND_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	fmc_update_region_info(fmdev, region_to_set);

	/* Check whether current RX frequency is within band boundary */
	if (fmdev->rx.freq < fmdev->rx.region.bot_freq)
		new_frq = fmdev->rx.region.bot_freq;
	else if (fmdev->rx.freq > fmdev->rx.region.top_freq)
		new_frq = fmdev->rx.region.top_freq;

	if (new_frq) {
		fmdbg("Current freq is not within band limit boundary,"
				"switching to %d KHz\n", new_frq);
		 /* Current RX frequency is not in range. So, update it */
		ret = fm_rx_set_freq(fmdev, new_frq);
	}

	return ret;
}

/* Reads current mute mode (Mute Off/On/Attenuate)*/
int fm_rx_get_mute_mode(struct fmdev *fmdev, u8 *curr_mute_mode)
{
	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (curr_mute_mode == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*curr_mute_mode = fmdev->rx.mute_mode;

	return 0;
}

static int fm_config_rx_mute_reg(struct fmdev *fmdev)
{
	u16 payload, muteval;
	int ret;

	muteval = 0;
	switch (fmdev->rx.mute_mode) {
	case FM_MUTE_ON:
		muteval = FM_RX_AC_MUTE_MODE;
		break;

	case FM_MUTE_OFF:
		muteval = FM_RX_UNMUTE_MODE;
		break;

	case FM_MUTE_ATTENUATE:
		muteval = FM_RX_SOFT_MUTE_FORCE_MODE;
		break;
	}
	if (fmdev->rx.rf_depend_mute == FM_RX_RF_DEPENDENT_MUTE_ON)
		muteval |= FM_RX_RF_DEP_MODE;
	else
		muteval &= ~FM_RX_RF_DEP_MODE;

	payload = muteval;
	ret = fmc_send_cmd(fmdev, MUTE_STATUS_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	return 0;
}

/* Configures mute mode (Mute Off/On/Attenuate) */
int fm_rx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
{
	u8 org_state;
	int ret;

	if (fmdev->rx.mute_mode == mute_mode_toset)
		return 0;

	org_state = fmdev->rx.mute_mode;
	fmdev->rx.mute_mode = mute_mode_toset;

	ret = fm_config_rx_mute_reg(fmdev);
	if (ret < 0) {
		fmdev->rx.mute_mode = org_state;
		return ret;
	}

	return 0;
}

/* Gets RF dependent soft mute mode enable/disable status */
int fm_rx_get_rfdepend_softmute(struct fmdev *fmdev, u8 *curr_mute_mode)
{
	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (curr_mute_mode == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*curr_mute_mode = fmdev->rx.rf_depend_mute;

	return 0;
}

/* Sets RF dependent soft mute mode */
int fm_rx_set_rfdepend_softmute(struct fmdev *fmdev, u8 rfdepend_mute)
{
	u8 org_state;
	int ret;

	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (rfdepend_mute != FM_RX_RF_DEPENDENT_MUTE_ON &&
	    rfdepend_mute != FM_RX_RF_DEPENDENT_MUTE_OFF) {
		fmerr("Invalid RF dependent soft mute\n");
		return -EINVAL;
	}
	if (fmdev->rx.rf_depend_mute == rfdepend_mute)
		return 0;

	org_state = fmdev->rx.rf_depend_mute;
	fmdev->rx.rf_depend_mute = rfdepend_mute;

	ret = fm_config_rx_mute_reg(fmdev);
	if (ret < 0) {
		fmdev->rx.rf_depend_mute = org_state;
		return ret;
	}

	return 0;
}

/* Returns the signal strength level of current channel */
int fm_rx_get_rssi_level(struct fmdev *fmdev, u16 *rssilvl)
{
	u16 curr_rssi_lel;
	u32 resp_len;
	int ret;

	if (rssilvl == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}
	/* Read current RSSI level */
	ret = fmc_send_cmd(fmdev, RSSI_LVL_GET, REG_RD, NULL, 2,
			&curr_rssi_lel, &resp_len);
	if (ret < 0)
		return ret;

	*rssilvl = be16_to_cpu(curr_rssi_lel);

	return 0;
}

/*
 * Sets the signal strength level that once reached
 * will stop the auto search process
 */
int fm_rx_set_rssi_threshold(struct fmdev *fmdev, short rssi_lvl_toset)
{
	u16 payload;
	int ret;

	if (rssi_lvl_toset < FM_RX_RSSI_THRESHOLD_MIN ||
			rssi_lvl_toset > FM_RX_RSSI_THRESHOLD_MAX) {
		fmerr("Invalid RSSI threshold level\n");
		return -EINVAL;
	}
	payload = (u16)rssi_lvl_toset;
	ret = fmc_send_cmd(fmdev, SEARCH_LVL_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	fmdev->rx.rssi_threshold = rssi_lvl_toset;

	return 0;
}

/* Returns current RX RSSI threshold value */
int fm_rx_get_rssi_threshold(struct fmdev *fmdev, short *curr_rssi_lvl)
{
	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (curr_rssi_lvl == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*curr_rssi_lvl = fmdev->rx.rssi_threshold;

	return 0;
}

/* Sets RX stereo/mono modes */
int fm_rx_set_stereo_mono(struct fmdev *fmdev, u16 mode)
{
	u16 payload;
	int ret;

	if (mode != FM_STEREO_MODE && mode != FM_MONO_MODE) {
		fmerr("Invalid mode\n");
		return -EINVAL;
	}

	/* Set stereo/mono mode */
	payload = (u16)mode;
	ret = fmc_send_cmd(fmdev, MOST_MODE_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	/* Set stereo blending mode */
	payload = FM_STEREO_SOFT_BLEND;
	ret = fmc_send_cmd(fmdev, MOST_BLEND_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	return 0;
}

/* Gets current RX stereo/mono mode */
int fm_rx_get_stereo_mono(struct fmdev *fmdev, u16 *mode)
{
	u16 curr_mode;
	u32 resp_len;
	int ret;

	if (mode == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	ret = fmc_send_cmd(fmdev, MOST_MODE_SET, REG_RD, NULL, 2,
			&curr_mode, &resp_len);
	if (ret < 0)
		return ret;

	*mode = be16_to_cpu(curr_mode);

	return 0;
}

/* Choose RX de-emphasis filter mode (50us/75us) */
int fm_rx_set_deemphasis_mode(struct fmdev *fmdev, u16 mode)
{
	u16 payload;
	int ret;

	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (mode != FM_RX_EMPHASIS_FILTER_50_USEC &&
			mode != FM_RX_EMPHASIS_FILTER_75_USEC) {
		fmerr("Invalid rx de-emphasis mode (%d)\n", mode);
		return -EINVAL;
	}

	payload = mode;
	ret = fmc_send_cmd(fmdev, DEMPH_MODE_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	fmdev->rx.deemphasis_mode = mode;

	return 0;
}

/* Gets current RX de-emphasis filter mode */
int fm_rx_get_deemph_mode(struct fmdev *fmdev, u16 *curr_deemphasis_mode)
{
	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (curr_deemphasis_mode == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*curr_deemphasis_mode = fmdev->rx.deemphasis_mode;

	return 0;
}

/* Enable/Disable RX RDS */
int fm_rx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
{
	u16 payload;
	int ret;

	if (rds_en_dis != FM_RDS_ENABLE && rds_en_dis != FM_RDS_DISABLE) {
		fmerr("Invalid rds option\n");
		return -EINVAL;
	}

	if (rds_en_dis == FM_RDS_ENABLE
	    && fmdev->rx.rds.flag == FM_RDS_DISABLE) {
		/* Turn on RX RDS and RDS circuit */
		payload = FM_RX_PWR_SET_FM_AND_RDS_BLK_ON;
		ret = fmc_send_cmd(fmdev, POWER_SET, REG_WR, &payload,
				sizeof(payload), NULL, NULL);
		if (ret < 0)
			return ret;

		/* Clear and reset RDS FIFO */
		payload = FM_RX_RDS_FLUSH_FIFO;
		ret = fmc_send_cmd(fmdev, RDS_CNTRL_SET, REG_WR, &payload,
		sizeof(payload), NULL, NULL);
		if (ret < 0)
			return ret;

		/* Read flags - just to clear any pending interrupts. */
		ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2,
				NULL, NULL);
		if (ret < 0)
			return ret;

		/* Set RDS FIFO threshold value */
		payload = FM_RX_RDS_FIFO_THRESHOLD;
		ret = fmc_send_cmd(fmdev, RDS_MEM_SET, REG_WR, &payload,
		sizeof(payload), NULL, NULL);
		if (ret < 0)
			return ret;

		/* Enable RDS interrupt */
		fmdev->irq_info.mask |= FM_RDS_EVENT;
		payload = fmdev->irq_info.mask;
		ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
				sizeof(payload), NULL, NULL);
		if (ret < 0) {
			fmdev->irq_info.mask &= ~FM_RDS_EVENT;
			return ret;
		}

		/* Update our local flag */
		fmdev->rx.rds.flag = FM_RDS_ENABLE;
	} else if (rds_en_dis == FM_RDS_DISABLE
		   && fmdev->rx.rds.flag == FM_RDS_ENABLE) {
		/* Turn off RX RDS */
		payload = FM_RX_PWR_SET_FM_ON_RDS_OFF;
		ret = fmc_send_cmd(fmdev, POWER_SET, REG_WR, &payload,
				sizeof(payload), NULL, NULL);
		if (ret < 0)
			return ret;

		/* Reset RDS pointers */
		fmdev->rx.rds.last_blk_idx = 0;
		fmdev->rx.rds.wr_idx = 0;
		fmdev->rx.rds.rd_idx = 0;
		fm_rx_reset_station_info(fmdev);

		/* Update RDS local cache */
		fmdev->irq_info.mask &= ~(FM_RDS_EVENT);
		fmdev->rx.rds.flag = FM_RDS_DISABLE;
	}

	return 0;
}

/* Returns current RX RDS enable/disable status */
int fm_rx_get_rds_mode(struct fmdev *fmdev, u8 *curr_rds_en_dis)
{
	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (curr_rds_en_dis == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*curr_rds_en_dis = fmdev->rx.rds.flag;

	return 0;
}

/* Sets RDS operation mode (RDS/RDBS) */
int fm_rx_set_rds_system(struct fmdev *fmdev, u8 rds_mode)
{
	u16 payload;
	int ret;

	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (rds_mode != FM_RDS_SYSTEM_RDS && rds_mode != FM_RDS_SYSTEM_RBDS) {
		fmerr("Invalid rds mode\n");
		return -EINVAL;
	}
	/* Set RDS operation mode */
	payload = (u16)rds_mode;
	ret = fmc_send_cmd(fmdev, RDS_SYSTEM_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	fmdev->rx.rds_mode = rds_mode;

	return 0;
}

/* Returns current RDS operation mode */
int fm_rx_get_rds_system(struct fmdev *fmdev, u8 *rds_mode)
{
	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (rds_mode == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*rds_mode = fmdev->rx.rds_mode;

	return 0;
}

/* Configures Alternate Frequency switch mode */
int fm_rx_set_af_switch(struct fmdev *fmdev, u8 af_mode)
{
	u16 payload;
	int ret;

	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (af_mode != FM_RX_RDS_AF_SWITCH_MODE_ON &&
	    af_mode != FM_RX_RDS_AF_SWITCH_MODE_OFF) {
		fmerr("Invalid af mode\n");
		return -EINVAL;
	}
	/* Enable/disable low RSSI interrupt based on af_mode */
	if (af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)
		fmdev->irq_info.mask |= FM_LEV_EVENT;
	else
		fmdev->irq_info.mask &= ~FM_LEV_EVENT;

	payload = fmdev->irq_info.mask;
	ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
			sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	fmdev->rx.af_mode = af_mode;

	return 0;
}

/* Returns Alternate Frequency switch status */
int fm_rx_get_af_switch(struct fmdev *fmdev, u8 *af_mode)
{
	if (fmdev->curr_fmmode != FM_MODE_RX)
		return -EPERM;

	if (af_mode == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*af_mode = fmdev->rx.af_mode;

	return 0;
}