Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
   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
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
/*
 *  FM Driver for Connectivity chip of Texas Instruments.
 *
 *  This sub-module of FM driver is common for FM RX and TX
 *  functionality. This module is responsible for:
 *  1) Forming group of Channel-8 commands to perform particular
 *     functionality (eg., frequency set require more than
 *     one Channel-8 command to be sent to the chip).
 *  2) Sending each Channel-8 command to the chip and reading
 *     response back over Shared Transport.
 *  3) Managing TX and RX Queues and Tasklets.
 *  4) Handling FM Interrupt packet and taking appropriate action.
 *  5) Loading FM firmware to the chip (common, FM TX, and FM RX
 *     firmware files based on mode selection)
 *
 *  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 <linux/module.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include "fmdrv.h"
#include "fmdrv_v4l2.h"
#include "fmdrv_common.h"
#include <linux/ti_wilink_st.h>
#include "fmdrv_rx.h"
#include "fmdrv_tx.h"

/* Region info */
static struct region_info region_configs[] = {
	/* Europe/US */
	{
	 .chanl_space = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL,
	 .bot_freq = 87500,	/* 87.5 MHz */
	 .top_freq = 108000,	/* 108 MHz */
	 .fm_band = 0,
	 },
	/* Japan */
	{
	 .chanl_space = FM_CHANNEL_SPACING_200KHZ * FM_FREQ_MUL,
	 .bot_freq = 76000,	/* 76 MHz */
	 .top_freq = 90000,	/* 90 MHz */
	 .fm_band = 1,
	 },
};

/* Band selection */
static u8 default_radio_region;	/* Europe/US */
module_param(default_radio_region, byte, 0);
MODULE_PARM_DESC(default_radio_region, "Region: 0=Europe/US, 1=Japan");

/* RDS buffer blocks */
static u32 default_rds_buf = 300;
module_param(default_rds_buf, uint, 0444);
MODULE_PARM_DESC(rds_buf, "RDS buffer entries");

/* Radio Nr */
static u32 radio_nr = -1;
module_param(radio_nr, int, 0444);
MODULE_PARM_DESC(radio_nr, "Radio Nr");

/* FM irq handlers forward declaration */
static void fm_irq_send_flag_getcmd(struct fmdev *);
static void fm_irq_handle_flag_getcmd_resp(struct fmdev *);
static void fm_irq_handle_hw_malfunction(struct fmdev *);
static void fm_irq_handle_rds_start(struct fmdev *);
static void fm_irq_send_rdsdata_getcmd(struct fmdev *);
static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *);
static void fm_irq_handle_rds_finish(struct fmdev *);
static void fm_irq_handle_tune_op_ended(struct fmdev *);
static void fm_irq_handle_power_enb(struct fmdev *);
static void fm_irq_handle_low_rssi_start(struct fmdev *);
static void fm_irq_afjump_set_pi(struct fmdev *);
static void fm_irq_handle_set_pi_resp(struct fmdev *);
static void fm_irq_afjump_set_pimask(struct fmdev *);
static void fm_irq_handle_set_pimask_resp(struct fmdev *);
static void fm_irq_afjump_setfreq(struct fmdev *);
static void fm_irq_handle_setfreq_resp(struct fmdev *);
static void fm_irq_afjump_enableint(struct fmdev *);
static void fm_irq_afjump_enableint_resp(struct fmdev *);
static void fm_irq_start_afjump(struct fmdev *);
static void fm_irq_handle_start_afjump_resp(struct fmdev *);
static void fm_irq_afjump_rd_freq(struct fmdev *);
static void fm_irq_afjump_rd_freq_resp(struct fmdev *);
static void fm_irq_handle_low_rssi_finish(struct fmdev *);
static void fm_irq_send_intmsk_cmd(struct fmdev *);
static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *);

/*
 * When FM common module receives interrupt packet, following handlers
 * will be executed one after another to service the interrupt(s)
 */
enum fmc_irq_handler_index {
	FM_SEND_FLAG_GETCMD_IDX,
	FM_HANDLE_FLAG_GETCMD_RESP_IDX,

	/* HW malfunction irq handler */
	FM_HW_MAL_FUNC_IDX,

	/* RDS threshold reached irq handler */
	FM_RDS_START_IDX,
	FM_RDS_SEND_RDS_GETCMD_IDX,
	FM_RDS_HANDLE_RDS_GETCMD_RESP_IDX,
	FM_RDS_FINISH_IDX,

	/* Tune operation ended irq handler */
	FM_HW_TUNE_OP_ENDED_IDX,

	/* TX power enable irq handler */
	FM_HW_POWER_ENB_IDX,

	/* Low RSSI irq handler */
	FM_LOW_RSSI_START_IDX,
	FM_AF_JUMP_SETPI_IDX,
	FM_AF_JUMP_HANDLE_SETPI_RESP_IDX,
	FM_AF_JUMP_SETPI_MASK_IDX,
	FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX,
	FM_AF_JUMP_SET_AF_FREQ_IDX,
	FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX,
	FM_AF_JUMP_ENABLE_INT_IDX,
	FM_AF_JUMP_ENABLE_INT_RESP_IDX,
	FM_AF_JUMP_START_AFJUMP_IDX,
	FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX,
	FM_AF_JUMP_RD_FREQ_IDX,
	FM_AF_JUMP_RD_FREQ_RESP_IDX,
	FM_LOW_RSSI_FINISH_IDX,

	/* Interrupt process post action */
	FM_SEND_INTMSK_CMD_IDX,
	FM_HANDLE_INTMSK_CMD_RESP_IDX,
};

/* FM interrupt handler table */
static int_handler_prototype int_handler_table[] = {
	fm_irq_send_flag_getcmd,
	fm_irq_handle_flag_getcmd_resp,
	fm_irq_handle_hw_malfunction,
	fm_irq_handle_rds_start, /* RDS threshold reached irq handler */
	fm_irq_send_rdsdata_getcmd,
	fm_irq_handle_rdsdata_getcmd_resp,
	fm_irq_handle_rds_finish,
	fm_irq_handle_tune_op_ended,
	fm_irq_handle_power_enb, /* TX power enable irq handler */
	fm_irq_handle_low_rssi_start,
	fm_irq_afjump_set_pi,
	fm_irq_handle_set_pi_resp,
	fm_irq_afjump_set_pimask,
	fm_irq_handle_set_pimask_resp,
	fm_irq_afjump_setfreq,
	fm_irq_handle_setfreq_resp,
	fm_irq_afjump_enableint,
	fm_irq_afjump_enableint_resp,
	fm_irq_start_afjump,
	fm_irq_handle_start_afjump_resp,
	fm_irq_afjump_rd_freq,
	fm_irq_afjump_rd_freq_resp,
	fm_irq_handle_low_rssi_finish,
	fm_irq_send_intmsk_cmd, /* Interrupt process post action */
	fm_irq_handle_intmsk_cmd_resp
};

long (*g_st_write) (struct sk_buff *skb);
static struct completion wait_for_fmdrv_reg_comp;

static inline void fm_irq_call(struct fmdev *fmdev)
{
	fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev);
}

/* Continue next function in interrupt handler table */
static inline void fm_irq_call_stage(struct fmdev *fmdev, u8 stage)
{
	fmdev->irq_info.stage = stage;
	fm_irq_call(fmdev);
}

static inline void fm_irq_timeout_stage(struct fmdev *fmdev, u8 stage)
{
	fmdev->irq_info.stage = stage;
	mod_timer(&fmdev->irq_info.timer, jiffies + FM_DRV_TX_TIMEOUT);
}

#ifdef FM_DUMP_TXRX_PKT
 /* To dump outgoing FM Channel-8 packets */
inline void dump_tx_skb_data(struct sk_buff *skb)
{
	int len, len_org;
	u8 index;
	struct fm_cmd_msg_hdr *cmd_hdr;

	cmd_hdr = (struct fm_cmd_msg_hdr *)skb->data;
	printk(KERN_INFO "<<%shdr:%02x len:%02x opcode:%02x type:%s dlen:%02x",
	       fm_cb(skb)->completion ? " " : "*", cmd_hdr->hdr,
	       cmd_hdr->len, cmd_hdr->op,
	       cmd_hdr->rd_wr ? "RD" : "WR", cmd_hdr->dlen);

	len_org = skb->len - FM_CMD_MSG_HDR_SIZE;
	if (len_org > 0) {
		printk("\n   data(%d): ", cmd_hdr->dlen);
		len = min(len_org, 14);
		for (index = 0; index < len; index++)
			printk("%x ",
			       skb->data[FM_CMD_MSG_HDR_SIZE + index]);
		printk("%s", (len_org > 14) ? ".." : "");
	}
	printk("\n");
}

 /* To dump incoming FM Channel-8 packets */
inline void dump_rx_skb_data(struct sk_buff *skb)
{
	int len, len_org;
	u8 index;
	struct fm_event_msg_hdr *evt_hdr;

	evt_hdr = (struct fm_event_msg_hdr *)skb->data;
	printk(KERN_INFO ">> hdr:%02x len:%02x sts:%02x numhci:%02x "
	    "opcode:%02x type:%s dlen:%02x", evt_hdr->hdr, evt_hdr->len,
	    evt_hdr->status, evt_hdr->num_fm_hci_cmds, evt_hdr->op,
	    (evt_hdr->rd_wr) ? "RD" : "WR", evt_hdr->dlen);

	len_org = skb->len - FM_EVT_MSG_HDR_SIZE;
	if (len_org > 0) {
		printk("\n   data(%d): ", evt_hdr->dlen);
		len = min(len_org, 14);
		for (index = 0; index < len; index++)
			printk("%x ",
			       skb->data[FM_EVT_MSG_HDR_SIZE + index]);
		printk("%s", (len_org > 14) ? ".." : "");
	}
	printk("\n");
}
#endif

void fmc_update_region_info(struct fmdev *fmdev, u8 region_to_set)
{
	fmdev->rx.region = region_configs[region_to_set];
}

/*
 * FM common sub-module will schedule this tasklet whenever it receives
 * FM packet from ST driver.
 */
static void recv_tasklet(unsigned long arg)
{
	struct fmdev *fmdev;
	struct fm_irq *irq_info;
	struct fm_event_msg_hdr *evt_hdr;
	struct sk_buff *skb;
	u8 num_fm_hci_cmds;
	unsigned long flags;

	fmdev = (struct fmdev *)arg;
	irq_info = &fmdev->irq_info;
	/* Process all packets in the RX queue */
	while ((skb = skb_dequeue(&fmdev->rx_q))) {
		if (skb->len < sizeof(struct fm_event_msg_hdr)) {
			fmerr("skb(%p) has only %d bytes, "
				"at least need %zu bytes to decode\n", skb,
				skb->len, sizeof(struct fm_event_msg_hdr));
			kfree_skb(skb);
			continue;
		}

		evt_hdr = (void *)skb->data;
		num_fm_hci_cmds = evt_hdr->num_fm_hci_cmds;

		/* FM interrupt packet? */
		if (evt_hdr->op == FM_INTERRUPT) {
			/* FM interrupt handler started already? */
			if (!test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) {
				set_bit(FM_INTTASK_RUNNING, &fmdev->flag);
				if (irq_info->stage != 0) {
					fmerr("Inval stage resetting to zero\n");
					irq_info->stage = 0;
				}

				/*
				 * Execute first function in interrupt handler
				 * table.
				 */
				irq_info->handlers[irq_info->stage](fmdev);
			} else {
				set_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag);
			}
			kfree_skb(skb);
		}
		/* Anyone waiting for this with completion handler? */
		else if (evt_hdr->op == fmdev->pre_op && fmdev->resp_comp != NULL) {

			spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
			fmdev->resp_skb = skb;
			spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);
			complete(fmdev->resp_comp);

			fmdev->resp_comp = NULL;
			atomic_set(&fmdev->tx_cnt, 1);
		}
		/* Is this for interrupt handler? */
		else if (evt_hdr->op == fmdev->pre_op && fmdev->resp_comp == NULL) {
			if (fmdev->resp_skb != NULL)
				fmerr("Response SKB ptr not NULL\n");

			spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
			fmdev->resp_skb = skb;
			spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);

			/* Execute interrupt handler where state index points */
			irq_info->handlers[irq_info->stage](fmdev);

			kfree_skb(skb);
			atomic_set(&fmdev->tx_cnt, 1);
		} else {
			fmerr("Nobody claimed SKB(%p),purging\n", skb);
		}

		/*
		 * Check flow control field. If Num_FM_HCI_Commands field is
		 * not zero, schedule FM TX tasklet.
		 */
		if (num_fm_hci_cmds && atomic_read(&fmdev->tx_cnt))
			if (!skb_queue_empty(&fmdev->tx_q))
				tasklet_schedule(&fmdev->tx_task);
	}
}

/* FM send tasklet: is scheduled when FM packet has to be sent to chip */
static void send_tasklet(unsigned long arg)
{
	struct fmdev *fmdev;
	struct sk_buff *skb;
	int len;

	fmdev = (struct fmdev *)arg;

	if (!atomic_read(&fmdev->tx_cnt))
		return;

	/* Check, is there any timeout happened to last transmitted packet */
	if ((jiffies - fmdev->last_tx_jiffies) > FM_DRV_TX_TIMEOUT) {
		fmerr("TX timeout occurred\n");
		atomic_set(&fmdev->tx_cnt, 1);
	}

	/* Send queued FM TX packets */
	skb = skb_dequeue(&fmdev->tx_q);
	if (!skb)
		return;

	atomic_dec(&fmdev->tx_cnt);
	fmdev->pre_op = fm_cb(skb)->fm_op;

	if (fmdev->resp_comp != NULL)
		fmerr("Response completion handler is not NULL\n");

	fmdev->resp_comp = fm_cb(skb)->completion;

	/* Write FM packet to ST driver */
	len = g_st_write(skb);
	if (len < 0) {
		kfree_skb(skb);
		fmdev->resp_comp = NULL;
		fmerr("TX tasklet failed to send skb(%p)\n", skb);
		atomic_set(&fmdev->tx_cnt, 1);
	} else {
		fmdev->last_tx_jiffies = jiffies;
	}
}

/*
 * Queues FM Channel-8 packet to FM TX queue and schedules FM TX tasklet for
 * transmission
 */
static u32 fm_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type,	void *payload,
		int payload_len, struct completion *wait_completion)
{
	struct sk_buff *skb;
	struct fm_cmd_msg_hdr *hdr;
	int size;

	if (fm_op >= FM_INTERRUPT) {
		fmerr("Invalid fm opcode - %d\n", fm_op);
		return -EINVAL;
	}
	if (test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag) && payload == NULL) {
		fmerr("Payload data is NULL during fw download\n");
		return -EINVAL;
	}
	if (!test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag))
		size =
		    FM_CMD_MSG_HDR_SIZE + ((payload == NULL) ? 0 : payload_len);
	else
		size = payload_len;

	skb = alloc_skb(size, GFP_ATOMIC);
	if (!skb) {
		fmerr("No memory to create new SKB\n");
		return -ENOMEM;
	}
	/*
	 * Don't fill FM header info for the commands which come from
	 * FM firmware file.
	 */
	if (!test_bit(FM_FW_DW_INPROGRESS, &fmdev->flag) ||
			test_bit(FM_INTTASK_RUNNING, &fmdev->flag)) {
		/* Fill command header info */
		hdr = (struct fm_cmd_msg_hdr *)skb_put(skb, FM_CMD_MSG_HDR_SIZE);
		hdr->hdr = FM_PKT_LOGICAL_CHAN_NUMBER;	/* 0x08 */

		/* 3 (fm_opcode,rd_wr,dlen) + payload len) */
		hdr->len = ((payload == NULL) ? 0 : payload_len) + 3;

		/* FM opcode */
		hdr->op = fm_op;

		/* read/write type */
		hdr->rd_wr = type;
		hdr->dlen = payload_len;
		fm_cb(skb)->fm_op = fm_op;

		/*
		 * If firmware download has finished and the command is
		 * not a read command then payload is != NULL - a write
		 * command with u16 payload - convert to be16
		 */
		if (payload != NULL)
			*(u16 *)payload = cpu_to_be16(*(u16 *)payload);

	} else if (payload != NULL) {
		fm_cb(skb)->fm_op = *((u8 *)payload + 2);
	}
	if (payload != NULL)
		memcpy(skb_put(skb, payload_len), payload, payload_len);

	fm_cb(skb)->completion = wait_completion;
	skb_queue_tail(&fmdev->tx_q, skb);
	tasklet_schedule(&fmdev->tx_task);

	return 0;
}

/* Sends FM Channel-8 command to the chip and waits for the response */
u32 fmc_send_cmd(struct fmdev *fmdev, u8 fm_op, u16 type, void *payload,
		unsigned int payload_len, void *response, int *response_len)
{
	struct sk_buff *skb;
	struct fm_event_msg_hdr *evt_hdr;
	unsigned long flags;
	u32 ret;

	init_completion(&fmdev->maintask_comp);
	ret = fm_send_cmd(fmdev, fm_op, type, payload, payload_len,
			    &fmdev->maintask_comp);
	if (ret)
		return ret;

	ret = wait_for_completion_timeout(&fmdev->maintask_comp, FM_DRV_TX_TIMEOUT);
	if (!ret) {
		fmerr("Timeout(%d sec),didn't get reg"
			   "completion signal from RX tasklet\n",
			   jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
		return -ETIMEDOUT;
	}
	if (!fmdev->resp_skb) {
		fmerr("Response SKB is missing\n");
		return -EFAULT;
	}
	spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
	skb = fmdev->resp_skb;
	fmdev->resp_skb = NULL;
	spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);

	evt_hdr = (void *)skb->data;
	if (evt_hdr->status != 0) {
		fmerr("Received event pkt status(%d) is not zero\n",
			   evt_hdr->status);
		kfree_skb(skb);
		return -EIO;
	}
	/* Send response data to caller */
	if (response != NULL && response_len != NULL && evt_hdr->dlen) {
		/* Skip header info and copy only response data */
		skb_pull(skb, sizeof(struct fm_event_msg_hdr));
		memcpy(response, skb->data, evt_hdr->dlen);
		*response_len = evt_hdr->dlen;
	} else if (response_len != NULL && evt_hdr->dlen == 0) {
		*response_len = 0;
	}
	kfree_skb(skb);

	return 0;
}

/* --- Helper functions used in FM interrupt handlers ---*/
static inline u32 check_cmdresp_status(struct fmdev *fmdev,
		struct sk_buff **skb)
{
	struct fm_event_msg_hdr *fm_evt_hdr;
	unsigned long flags;

	del_timer(&fmdev->irq_info.timer);

	spin_lock_irqsave(&fmdev->resp_skb_lock, flags);
	*skb = fmdev->resp_skb;
	fmdev->resp_skb = NULL;
	spin_unlock_irqrestore(&fmdev->resp_skb_lock, flags);

	fm_evt_hdr = (void *)(*skb)->data;
	if (fm_evt_hdr->status != 0) {
		fmerr("irq: opcode %x response status is not zero "
				"Initiating irq recovery process\n",
				fm_evt_hdr->op);

		mod_timer(&fmdev->irq_info.timer, jiffies + FM_DRV_TX_TIMEOUT);
		return -1;
	}

	return 0;
}

static inline void fm_irq_common_cmd_resp_helper(struct fmdev *fmdev, u8 stage)
{
	struct sk_buff *skb;

	if (!check_cmdresp_status(fmdev, &skb))
		fm_irq_call_stage(fmdev, stage);
}

/*
 * Interrupt process timeout handler.
 * One of the irq handler did not get proper response from the chip. So take
 * recovery action here. FM interrupts are disabled in the beginning of
 * interrupt process. Therefore reset stage index to re-enable default
 * interrupts. So that next interrupt will be processed as usual.
 */
static void int_timeout_handler(unsigned long data)
{
	struct fmdev *fmdev;
	struct fm_irq *fmirq;

	fmdbg("irq: timeout,trying to re-enable fm interrupts\n");
	fmdev = (struct fmdev *)data;
	fmirq = &fmdev->irq_info;
	fmirq->retry++;

	if (fmirq->retry > FM_IRQ_TIMEOUT_RETRY_MAX) {
		/* Stop recovery action (interrupt reenable process) and
		 * reset stage index & retry count values */
		fmirq->stage = 0;
		fmirq->retry = 0;
		fmerr("Recovery action failed during"
				"irq processing, max retry reached\n");
		return;
	}
	fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX);
}

/* --------- FM interrupt handlers ------------*/
static void fm_irq_send_flag_getcmd(struct fmdev *fmdev)
{
	u16 flag;

	/* Send FLAG_GET command , to know the source of interrupt */
	if (!fm_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, sizeof(flag), NULL))
		fm_irq_timeout_stage(fmdev, FM_HANDLE_FLAG_GETCMD_RESP_IDX);
}

static void fm_irq_handle_flag_getcmd_resp(struct fmdev *fmdev)
{
	struct sk_buff *skb;
	struct fm_event_msg_hdr *fm_evt_hdr;

	if (check_cmdresp_status(fmdev, &skb))
		return;

	fm_evt_hdr = (void *)skb->data;

	/* Skip header info and copy only response data */
	skb_pull(skb, sizeof(struct fm_event_msg_hdr));
	memcpy(&fmdev->irq_info.flag, skb->data, fm_evt_hdr->dlen);

	fmdev->irq_info.flag = be16_to_cpu(fmdev->irq_info.flag);
	fmdbg("irq: flag register(0x%x)\n", fmdev->irq_info.flag);

	/* Continue next function in interrupt handler table */
	fm_irq_call_stage(fmdev, FM_HW_MAL_FUNC_IDX);
}

static void fm_irq_handle_hw_malfunction(struct fmdev *fmdev)
{
	if (fmdev->irq_info.flag & FM_MAL_EVENT & fmdev->irq_info.mask)
		fmerr("irq: HW MAL int received - do nothing\n");

	/* Continue next function in interrupt handler table */
	fm_irq_call_stage(fmdev, FM_RDS_START_IDX);
}

static void fm_irq_handle_rds_start(struct fmdev *fmdev)
{
	if (fmdev->irq_info.flag & FM_RDS_EVENT & fmdev->irq_info.mask) {
		fmdbg("irq: rds threshold reached\n");
		fmdev->irq_info.stage = FM_RDS_SEND_RDS_GETCMD_IDX;
	} else {
		/* Continue next function in interrupt handler table */
		fmdev->irq_info.stage = FM_HW_TUNE_OP_ENDED_IDX;
	}

	fm_irq_call(fmdev);
}

static void fm_irq_send_rdsdata_getcmd(struct fmdev *fmdev)
{
	/* Send the command to read RDS data from the chip */
	if (!fm_send_cmd(fmdev, RDS_DATA_GET, REG_RD, NULL,
			    (FM_RX_RDS_FIFO_THRESHOLD * 3), NULL))
		fm_irq_timeout_stage(fmdev, FM_RDS_HANDLE_RDS_GETCMD_RESP_IDX);
}

/* Keeps track of current RX channel AF (Alternate Frequency) */
static void fm_rx_update_af_cache(struct fmdev *fmdev, u8 af)
{
	struct tuned_station_info *stat_info = &fmdev->rx.stat_info;
	u8 reg_idx = fmdev->rx.region.fm_band;
	u8 index;
	u32 freq;

	/* First AF indicates the number of AF follows. Reset the list */
	if ((af >= FM_RDS_1_AF_FOLLOWS) && (af <= FM_RDS_25_AF_FOLLOWS)) {
		fmdev->rx.stat_info.af_list_max = (af - FM_RDS_1_AF_FOLLOWS + 1);
		fmdev->rx.stat_info.afcache_size = 0;
		fmdbg("No of expected AF : %d\n", fmdev->rx.stat_info.af_list_max);
		return;
	}

	if (af < FM_RDS_MIN_AF)
		return;
	if (reg_idx == FM_BAND_EUROPE_US && af > FM_RDS_MAX_AF)
		return;
	if (reg_idx == FM_BAND_JAPAN && af > FM_RDS_MAX_AF_JAPAN)
		return;

	freq = fmdev->rx.region.bot_freq + (af * 100);
	if (freq == fmdev->rx.freq) {
		fmdbg("Current freq(%d) is matching with received AF(%d)\n",
				fmdev->rx.freq, freq);
		return;
	}
	/* Do check in AF cache */
	for (index = 0; index < stat_info->afcache_size; index++) {
		if (stat_info->af_cache[index] == freq)
			break;
	}
	/* Reached the limit of the list - ignore the next AF */
	if (index == stat_info->af_list_max) {
		fmdbg("AF cache is full\n");
		return;
	}
	/*
	 * If we reached the end of the list then this AF is not
	 * in the list - add it.
	 */
	if (index == stat_info->afcache_size) {
		fmdbg("Storing AF %d to cache index %d\n", freq, index);
		stat_info->af_cache[index] = freq;
		stat_info->afcache_size++;
	}
}

/*
 * Converts RDS buffer data from big endian format
 * to little endian format.
 */
static void fm_rdsparse_swapbytes(struct fmdev *fmdev,
		struct fm_rdsdata_format *rds_format)
{
	u8 byte1;
	u8 index = 0;
	u8 *rds_buff;

	/*
	 * Since in Orca the 2 RDS Data bytes are in little endian and
	 * in Dolphin they are in big endian, the parsing of the RDS data
	 * is chip dependent
	 */
	if (fmdev->asci_id != 0x6350) {
		rds_buff = &rds_format->data.groupdatabuff.buff[0];
		while (index + 1 < FM_RX_RDS_INFO_FIELD_MAX) {
			byte1 = rds_buff[index];
			rds_buff[index] = rds_buff[index + 1];
			rds_buff[index + 1] = byte1;
			index += 2;
		}
	}
}

static void fm_irq_handle_rdsdata_getcmd_resp(struct fmdev *fmdev)
{
	struct sk_buff *skb;
	struct fm_rdsdata_format rds_fmt;
	struct fm_rds *rds = &fmdev->rx.rds;
	unsigned long group_idx, flags;
	u8 *rds_data, meta_data, tmpbuf[3];
	u8 type, blk_idx;
	u16 cur_picode;
	u32 rds_len;

	if (check_cmdresp_status(fmdev, &skb))
		return;

	/* Skip header info */
	skb_pull(skb, sizeof(struct fm_event_msg_hdr));
	rds_data = skb->data;
	rds_len = skb->len;

	/* Parse the RDS data */
	while (rds_len >= FM_RDS_BLK_SIZE) {
		meta_data = rds_data[2];
		/* Get the type: 0=A, 1=B, 2=C, 3=C', 4=D, 5=E */
		type = (meta_data & 0x07);

		/* Transform the blk type into index sequence (0, 1, 2, 3, 4) */
		blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1));
		fmdbg("Block index:%d(%s)\n", blk_idx,
			   (meta_data & FM_RDS_STATUS_ERR_MASK) ? "Bad" : "Ok");

		if ((meta_data & FM_RDS_STATUS_ERR_MASK) != 0)
			break;

		if (blk_idx < FM_RDS_BLK_IDX_A || blk_idx > FM_RDS_BLK_IDX_D) {
			fmdbg("Block sequence mismatch\n");
			rds->last_blk_idx = -1;
			break;
		}

		/* Skip checkword (control) byte and copy only data byte */
		memcpy(&rds_fmt.data.groupdatabuff.
				buff[blk_idx * (FM_RDS_BLK_SIZE - 1)],
				rds_data, (FM_RDS_BLK_SIZE - 1));

		rds->last_blk_idx = blk_idx;

		/* If completed a whole group then handle it */
		if (blk_idx == FM_RDS_BLK_IDX_D) {
			fmdbg("Good block received\n");
			fm_rdsparse_swapbytes(fmdev, &rds_fmt);

			/*
			 * Extract PI code and store in local cache.
			 * We need this during AF switch processing.
			 */
			cur_picode = be16_to_cpu(rds_fmt.data.groupgeneral.pidata);
			if (fmdev->rx.stat_info.picode != cur_picode)
				fmdev->rx.stat_info.picode = cur_picode;

			fmdbg("picode:%d\n", cur_picode);

			group_idx = (rds_fmt.data.groupgeneral.blk_b[0] >> 3);
			fmdbg("(fmdrv):Group:%ld%s\n", group_idx/2,
					(group_idx % 2) ? "B" : "A");

			group_idx = 1 << (rds_fmt.data.groupgeneral.blk_b[0] >> 3);
			if (group_idx == FM_RDS_GROUP_TYPE_MASK_0A) {
				fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[0]);
				fm_rx_update_af_cache(fmdev, rds_fmt.data.group0A.af[1]);
			}
		}
		rds_len -= FM_RDS_BLK_SIZE;
		rds_data += FM_RDS_BLK_SIZE;
	}

	/* Copy raw rds data to internal rds buffer */
	rds_data = skb->data;
	rds_len = skb->len;

	spin_lock_irqsave(&fmdev->rds_buff_lock, flags);
	while (rds_len > 0) {
		/*
		 * Fill RDS buffer as per V4L2 specification.
		 * Store control byte
		 */
		type = (rds_data[2] & 0x07);
		blk_idx = (type <= FM_RDS_BLOCK_C ? type : (type - 1));
		tmpbuf[2] = blk_idx;	/* Offset name */
		tmpbuf[2] |= blk_idx << 3;	/* Received offset */

		/* Store data byte */
		tmpbuf[0] = rds_data[0];
		tmpbuf[1] = rds_data[1];

		memcpy(&rds->buff[rds->wr_idx], &tmpbuf, FM_RDS_BLK_SIZE);
		rds->wr_idx = (rds->wr_idx + FM_RDS_BLK_SIZE) % rds->buf_size;

		/* Check for overflow & start over */
		if (rds->wr_idx == rds->rd_idx) {
			fmdbg("RDS buffer overflow\n");
			rds->wr_idx = 0;
			rds->rd_idx = 0;
			break;
		}
		rds_len -= FM_RDS_BLK_SIZE;
		rds_data += FM_RDS_BLK_SIZE;
	}
	spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);

	/* Wakeup read queue */
	if (rds->wr_idx != rds->rd_idx)
		wake_up_interruptible(&rds->read_queue);

	fm_irq_call_stage(fmdev, FM_RDS_FINISH_IDX);
}

static void fm_irq_handle_rds_finish(struct fmdev *fmdev)
{
	fm_irq_call_stage(fmdev, FM_HW_TUNE_OP_ENDED_IDX);
}

static void fm_irq_handle_tune_op_ended(struct fmdev *fmdev)
{
	if (fmdev->irq_info.flag & (FM_FR_EVENT | FM_BL_EVENT) & fmdev->
	    irq_info.mask) {
		fmdbg("irq: tune ended/bandlimit reached\n");
		if (test_and_clear_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag)) {
			fmdev->irq_info.stage = FM_AF_JUMP_RD_FREQ_IDX;
		} else {
			complete(&fmdev->maintask_comp);
			fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX;
		}
	} else
		fmdev->irq_info.stage = FM_HW_POWER_ENB_IDX;

	fm_irq_call(fmdev);
}

static void fm_irq_handle_power_enb(struct fmdev *fmdev)
{
	if (fmdev->irq_info.flag & FM_POW_ENB_EVENT) {
		fmdbg("irq: Power Enabled/Disabled\n");
		complete(&fmdev->maintask_comp);
	}

	fm_irq_call_stage(fmdev, FM_LOW_RSSI_START_IDX);
}

static void fm_irq_handle_low_rssi_start(struct fmdev *fmdev)
{
	if ((fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON) &&
	    (fmdev->irq_info.flag & FM_LEV_EVENT & fmdev->irq_info.mask) &&
	    (fmdev->rx.freq != FM_UNDEFINED_FREQ) &&
	    (fmdev->rx.stat_info.afcache_size != 0)) {
		fmdbg("irq: rssi level has fallen below threshold level\n");

		/* Disable further low RSSI interrupts */
		fmdev->irq_info.mask &= ~FM_LEV_EVENT;

		fmdev->rx.afjump_idx = 0;
		fmdev->rx.freq_before_jump = fmdev->rx.freq;
		fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX;
	} else {
		/* Continue next function in interrupt handler table */
		fmdev->irq_info.stage = FM_SEND_INTMSK_CMD_IDX;
	}

	fm_irq_call(fmdev);
}

static void fm_irq_afjump_set_pi(struct fmdev *fmdev)
{
	u16 payload;

	/* Set PI code - must be updated if the AF list is not empty */
	payload = fmdev->rx.stat_info.picode;
	if (!fm_send_cmd(fmdev, RDS_PI_SET, REG_WR, &payload, sizeof(payload), NULL))
		fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_RESP_IDX);
}

static void fm_irq_handle_set_pi_resp(struct fmdev *fmdev)
{
	fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SETPI_MASK_IDX);
}

/*
 * Set PI mask.
 * 0xFFFF = Enable PI code matching
 * 0x0000 = Disable PI code matching
 */
static void fm_irq_afjump_set_pimask(struct fmdev *fmdev)
{
	u16 payload;

	payload = 0x0000;
	if (!fm_send_cmd(fmdev, RDS_PI_MASK_SET, REG_WR, &payload, sizeof(payload), NULL))
		fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SETPI_MASK_RESP_IDX);
}

static void fm_irq_handle_set_pimask_resp(struct fmdev *fmdev)
{
	fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_SET_AF_FREQ_IDX);
}

static void fm_irq_afjump_setfreq(struct fmdev *fmdev)
{
	u16 frq_index;
	u16 payload;

	fmdbg("Swtich to %d KHz\n", fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx]);
	frq_index = (fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx] -
	     fmdev->rx.region.bot_freq) / FM_FREQ_MUL;

	payload = frq_index;
	if (!fm_send_cmd(fmdev, AF_FREQ_SET, REG_WR, &payload, sizeof(payload), NULL))
		fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_SET_AFFREQ_RESP_IDX);
}

static void fm_irq_handle_setfreq_resp(struct fmdev *fmdev)
{
	fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_ENABLE_INT_IDX);
}

static void fm_irq_afjump_enableint(struct fmdev *fmdev)
{
	u16 payload;

	/* Enable FR (tuning operation ended) interrupt */
	payload = FM_FR_EVENT;
	if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload, sizeof(payload), NULL))
		fm_irq_timeout_stage(fmdev, FM_AF_JUMP_ENABLE_INT_RESP_IDX);
}

static void fm_irq_afjump_enableint_resp(struct fmdev *fmdev)
{
	fm_irq_common_cmd_resp_helper(fmdev, FM_AF_JUMP_START_AFJUMP_IDX);
}

static void fm_irq_start_afjump(struct fmdev *fmdev)
{
	u16 payload;

	payload = FM_TUNER_AF_JUMP_MODE;
	if (!fm_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
			sizeof(payload), NULL))
		fm_irq_timeout_stage(fmdev, FM_AF_JUMP_HANDLE_START_AFJUMP_RESP_IDX);
}

static void fm_irq_handle_start_afjump_resp(struct fmdev *fmdev)
{
	struct sk_buff *skb;

	if (check_cmdresp_status(fmdev, &skb))
		return;

	fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX;
	set_bit(FM_AF_SWITCH_INPROGRESS, &fmdev->flag);
	clear_bit(FM_INTTASK_RUNNING, &fmdev->flag);
}

static void fm_irq_afjump_rd_freq(struct fmdev *fmdev)
{
	u16 payload;

	if (!fm_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, sizeof(payload), NULL))
		fm_irq_timeout_stage(fmdev, FM_AF_JUMP_RD_FREQ_RESP_IDX);
}

static void fm_irq_afjump_rd_freq_resp(struct fmdev *fmdev)
{
	struct sk_buff *skb;
	u16 read_freq;
	u32 curr_freq, jumped_freq;

	if (check_cmdresp_status(fmdev, &skb))
		return;

	/* Skip header info and copy only response data */
	skb_pull(skb, sizeof(struct fm_event_msg_hdr));
	memcpy(&read_freq, skb->data, sizeof(read_freq));
	read_freq = be16_to_cpu(read_freq);
	curr_freq = fmdev->rx.region.bot_freq + ((u32)read_freq * FM_FREQ_MUL);

	jumped_freq = fmdev->rx.stat_info.af_cache[fmdev->rx.afjump_idx];

	/* If the frequency was changed the jump succeeded */
	if ((curr_freq != fmdev->rx.freq_before_jump) && (curr_freq == jumped_freq)) {
		fmdbg("Successfully switched to alternate freq %d\n", curr_freq);
		fmdev->rx.freq = curr_freq;
		fm_rx_reset_rds_cache(fmdev);

		/* AF feature is on, enable low level RSSI interrupt */
		if (fmdev->rx.af_mode == FM_RX_RDS_AF_SWITCH_MODE_ON)
			fmdev->irq_info.mask |= FM_LEV_EVENT;

		fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX;
	} else {		/* jump to the next freq in the AF list */
		fmdev->rx.afjump_idx++;

		/* If we reached the end of the list - stop searching */
		if (fmdev->rx.afjump_idx >= fmdev->rx.stat_info.afcache_size) {
			fmdbg("AF switch processing failed\n");
			fmdev->irq_info.stage = FM_LOW_RSSI_FINISH_IDX;
		} else {	/* AF List is not over - try next one */

			fmdbg("Trying next freq in AF cache\n");
			fmdev->irq_info.stage = FM_AF_JUMP_SETPI_IDX;
		}
	}
	fm_irq_call(fmdev);
}

static void fm_irq_handle_low_rssi_finish(struct fmdev *fmdev)
{
	fm_irq_call_stage(fmdev, FM_SEND_INTMSK_CMD_IDX);
}

static void fm_irq_send_intmsk_cmd(struct fmdev *fmdev)
{
	u16 payload;

	/* Re-enable FM interrupts */
	payload = fmdev->irq_info.mask;

	if (!fm_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
			sizeof(payload), NULL))
		fm_irq_timeout_stage(fmdev, FM_HANDLE_INTMSK_CMD_RESP_IDX);
}

static void fm_irq_handle_intmsk_cmd_resp(struct fmdev *fmdev)
{
	struct sk_buff *skb;

	if (check_cmdresp_status(fmdev, &skb))
		return;
	/*
	 * This is last function in interrupt table to be executed.
	 * So, reset stage index to 0.
	 */
	fmdev->irq_info.stage = FM_SEND_FLAG_GETCMD_IDX;

	/* Start processing any pending interrupt */
	if (test_and_clear_bit(FM_INTTASK_SCHEDULE_PENDING, &fmdev->flag))
		fmdev->irq_info.handlers[fmdev->irq_info.stage](fmdev);
	else
		clear_bit(FM_INTTASK_RUNNING, &fmdev->flag);
}

/* Returns availability of RDS data in internel buffer */
u32 fmc_is_rds_data_available(struct fmdev *fmdev, struct file *file,
				struct poll_table_struct *pts)
{
	poll_wait(file, &fmdev->rx.rds.read_queue, pts);
	if (fmdev->rx.rds.rd_idx != fmdev->rx.rds.wr_idx)
		return 0;

	return -EAGAIN;
}

/* Copies RDS data from internal buffer to user buffer */
u32 fmc_transfer_rds_from_internal_buff(struct fmdev *fmdev, struct file *file,
		u8 __user *buf, size_t count)
{
	u32 block_count;
	unsigned long flags;
	int ret;

	if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx) {
		if (file->f_flags & O_NONBLOCK)
			return -EWOULDBLOCK;

		ret = wait_event_interruptible(fmdev->rx.rds.read_queue,
				(fmdev->rx.rds.wr_idx != fmdev->rx.rds.rd_idx));
		if (ret)
			return -EINTR;
	}

	/* Calculate block count from byte count */
	count /= 3;
	block_count = 0;
	ret = 0;

	spin_lock_irqsave(&fmdev->rds_buff_lock, flags);

	while (block_count < count) {
		if (fmdev->rx.rds.wr_idx == fmdev->rx.rds.rd_idx)
			break;

		if (copy_to_user(buf, &fmdev->rx.rds.buff[fmdev->rx.rds.rd_idx],
					FM_RDS_BLK_SIZE))
			break;

		fmdev->rx.rds.rd_idx += FM_RDS_BLK_SIZE;
		if (fmdev->rx.rds.rd_idx >= fmdev->rx.rds.buf_size)
			fmdev->rx.rds.rd_idx = 0;

		block_count++;
		buf += FM_RDS_BLK_SIZE;
		ret += FM_RDS_BLK_SIZE;
	}
	spin_unlock_irqrestore(&fmdev->rds_buff_lock, flags);
	return ret;
}

u32 fmc_set_freq(struct fmdev *fmdev, u32 freq_to_set)
{
	switch (fmdev->curr_fmmode) {
	case FM_MODE_RX:
		return fm_rx_set_freq(fmdev, freq_to_set);

	case FM_MODE_TX:
		return fm_tx_set_freq(fmdev, freq_to_set);

	default:
		return -EINVAL;
	}
}

u32 fmc_get_freq(struct fmdev *fmdev, u32 *cur_tuned_frq)
{
	if (fmdev->rx.freq == FM_UNDEFINED_FREQ) {
		fmerr("RX frequency is not set\n");
		return -EPERM;
	}
	if (cur_tuned_frq == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	switch (fmdev->curr_fmmode) {
	case FM_MODE_RX:
		*cur_tuned_frq = fmdev->rx.freq;
		return 0;

	case FM_MODE_TX:
		*cur_tuned_frq = 0;	/* TODO : Change this later */
		return 0;

	default:
		return -EINVAL;
	}

}

u32 fmc_set_region(struct fmdev *fmdev, u8 region_to_set)
{
	switch (fmdev->curr_fmmode) {
	case FM_MODE_RX:
		return fm_rx_set_region(fmdev, region_to_set);

	case FM_MODE_TX:
		return fm_tx_set_region(fmdev, region_to_set);

	default:
		return -EINVAL;
	}
}

u32 fmc_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
{
	switch (fmdev->curr_fmmode) {
	case FM_MODE_RX:
		return fm_rx_set_mute_mode(fmdev, mute_mode_toset);

	case FM_MODE_TX:
		return fm_tx_set_mute_mode(fmdev, mute_mode_toset);

	default:
		return -EINVAL;
	}
}

u32 fmc_set_stereo_mono(struct fmdev *fmdev, u16 mode)
{
	switch (fmdev->curr_fmmode) {
	case FM_MODE_RX:
		return fm_rx_set_stereo_mono(fmdev, mode);

	case FM_MODE_TX:
		return fm_tx_set_stereo_mono(fmdev, mode);

	default:
		return -EINVAL;
	}
}

u32 fmc_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
{
	switch (fmdev->curr_fmmode) {
	case FM_MODE_RX:
		return fm_rx_set_rds_mode(fmdev, rds_en_dis);

	case FM_MODE_TX:
		return fm_tx_set_rds_mode(fmdev, rds_en_dis);

	default:
		return -EINVAL;
	}
}

/* Sends power off command to the chip */
static u32 fm_power_down(struct fmdev *fmdev)
{
	u16 payload;
	u32 ret;

	if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
		fmerr("FM core is not ready\n");
		return -EPERM;
	}
	if (fmdev->curr_fmmode == FM_MODE_OFF) {
		fmdbg("FM chip is already in OFF state\n");
		return 0;
	}

	payload = 0x0;
	ret = fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload,
		sizeof(payload), NULL, NULL);
	if (ret < 0)
		return ret;

	return fmc_release(fmdev);
}

/* Reads init command from FM firmware file and loads to the chip */
static u32 fm_download_firmware(struct fmdev *fmdev, const u8 *fw_name)
{
	const struct firmware *fw_entry;
	struct bts_header *fw_header;
	struct bts_action *action;
	struct bts_action_delay *delay;
	u8 *fw_data;
	int ret, fw_len, cmd_cnt;

	cmd_cnt = 0;
	set_bit(FM_FW_DW_INPROGRESS, &fmdev->flag);

	ret = request_firmware(&fw_entry, fw_name,
				&fmdev->radio_dev->dev);
	if (ret < 0) {
		fmerr("Unable to read firmware(%s) content\n", fw_name);
		return ret;
	}
	fmdbg("Firmware(%s) length : %d bytes\n", fw_name, fw_entry->size);

	fw_data = (void *)fw_entry->data;
	fw_len = fw_entry->size;

	fw_header = (struct bts_header *)fw_data;
	if (fw_header->magic != FM_FW_FILE_HEADER_MAGIC) {
		fmerr("%s not a legal TI firmware file\n", fw_name);
		ret = -EINVAL;
		goto rel_fw;
	}
	fmdbg("FW(%s) magic number : 0x%x\n", fw_name, fw_header->magic);

	/* Skip file header info , we already verified it */
	fw_data += sizeof(struct bts_header);
	fw_len -= sizeof(struct bts_header);

	while (fw_data && fw_len > 0) {
		action = (struct bts_action *)fw_data;

		switch (action->type) {
		case ACTION_SEND_COMMAND:	/* Send */
			if (fmc_send_cmd(fmdev, 0, 0, action->data,
						action->size, NULL, NULL))
				goto rel_fw;

			cmd_cnt++;
			break;

		case ACTION_DELAY:	/* Delay */
			delay = (struct bts_action_delay *)action->data;
			mdelay(delay->msec);
			break;
		}

		fw_data += (sizeof(struct bts_action) + (action->size));
		fw_len -= (sizeof(struct bts_action) + (action->size));
	}
	fmdbg("Firmware commands(%d) loaded to chip\n", cmd_cnt);
rel_fw:
	release_firmware(fw_entry);
	clear_bit(FM_FW_DW_INPROGRESS, &fmdev->flag);

	return ret;
}

/* Loads default RX configuration to the chip */
static u32 load_default_rx_configuration(struct fmdev *fmdev)
{
	int ret;

	ret = fm_rx_set_volume(fmdev, FM_DEFAULT_RX_VOLUME);
	if (ret < 0)
		return ret;

	return fm_rx_set_rssi_threshold(fmdev, FM_DEFAULT_RSSI_THRESHOLD);
}

/* Does FM power on sequence */
static u32 fm_power_up(struct fmdev *fmdev, u8 mode)
{
	u16 payload, asic_id, asic_ver;
	int resp_len, ret;
	u8 fw_name[50];

	if (mode >= FM_MODE_ENTRY_MAX) {
		fmerr("Invalid firmware download option\n");
		return -EINVAL;
	}

	/*
	 * Initialize FM common module. FM GPIO toggling is
	 * taken care in Shared Transport driver.
	 */
	ret = fmc_prepare(fmdev);
	if (ret < 0) {
		fmerr("Unable to prepare FM Common\n");
		return ret;
	}

	payload = FM_ENABLE;
	if (fmc_send_cmd(fmdev, FM_POWER_MODE, REG_WR, &payload,
			sizeof(payload), NULL, NULL))
		goto rel;

	/* Allow the chip to settle down in Channel-8 mode */
	msleep(20);

	if (fmc_send_cmd(fmdev, ASIC_ID_GET, REG_RD, NULL,
			sizeof(asic_id), &asic_id, &resp_len))
		goto rel;

	if (fmc_send_cmd(fmdev, ASIC_VER_GET, REG_RD, NULL,
			sizeof(asic_ver), &asic_ver, &resp_len))
		goto rel;

	fmdbg("ASIC ID: 0x%x , ASIC Version: %d\n",
		be16_to_cpu(asic_id), be16_to_cpu(asic_ver));

	sprintf(fw_name, "%s_%x.%d.bts", FM_FMC_FW_FILE_START,
		be16_to_cpu(asic_id), be16_to_cpu(asic_ver));

	ret = fm_download_firmware(fmdev, fw_name);
	if (ret < 0) {
		fmdbg("Failed to download firmware file %s\n", fw_name);
		goto rel;
	}
	sprintf(fw_name, "%s_%x.%d.bts", (mode == FM_MODE_RX) ?
			FM_RX_FW_FILE_START : FM_TX_FW_FILE_START,
			be16_to_cpu(asic_id), be16_to_cpu(asic_ver));

	ret = fm_download_firmware(fmdev, fw_name);
	if (ret < 0) {
		fmdbg("Failed to download firmware file %s\n", fw_name);
		goto rel;
	} else
		return ret;
rel:
	return fmc_release(fmdev);
}

/* Set FM Modes(TX, RX, OFF) */
u32 fmc_set_mode(struct fmdev *fmdev, u8 fm_mode)
{
	int ret = 0;

	if (fm_mode >= FM_MODE_ENTRY_MAX) {
		fmerr("Invalid FM mode\n");
		return -EINVAL;
	}
	if (fmdev->curr_fmmode == fm_mode) {
		fmdbg("Already fm is in mode(%d)\n", fm_mode);
		return ret;
	}

	switch (fm_mode) {
	case FM_MODE_OFF:	/* OFF Mode */
		ret = fm_power_down(fmdev);
		if (ret < 0) {
			fmerr("Failed to set OFF mode\n");
			return ret;
		}
		break;

	case FM_MODE_TX:	/* TX Mode */
	case FM_MODE_RX:	/* RX Mode */
		/* Power down before switching to TX or RX mode */
		if (fmdev->curr_fmmode != FM_MODE_OFF) {
			ret = fm_power_down(fmdev);
			if (ret < 0) {
				fmerr("Failed to set OFF mode\n");
				return ret;
			}
			msleep(30);
		}
		ret = fm_power_up(fmdev, fm_mode);
		if (ret < 0) {
			fmerr("Failed to load firmware\n");
			return ret;
		}
	}
	fmdev->curr_fmmode = fm_mode;

	/* Set default configuration */
	if (fmdev->curr_fmmode == FM_MODE_RX) {
		fmdbg("Loading default rx configuration..\n");
		ret = load_default_rx_configuration(fmdev);
		if (ret < 0)
			fmerr("Failed to load default values\n");
	}

	return ret;
}

/* Returns current FM mode (TX, RX, OFF) */
u32 fmc_get_mode(struct fmdev *fmdev, u8 *fmmode)
{
	if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
		fmerr("FM core is not ready\n");
		return -EPERM;
	}
	if (fmmode == NULL) {
		fmerr("Invalid memory\n");
		return -ENOMEM;
	}

	*fmmode = fmdev->curr_fmmode;
	return 0;
}

/* Called by ST layer when FM packet is available */
static long fm_st_receive(void *arg, struct sk_buff *skb)
{
	struct fmdev *fmdev;

	fmdev = (struct fmdev *)arg;

	if (skb == NULL) {
		fmerr("Invalid SKB received from ST\n");
		return -EFAULT;
	}

	if (skb->cb[0] != FM_PKT_LOGICAL_CHAN_NUMBER) {
		fmerr("Received SKB (%p) is not FM Channel 8 pkt\n", skb);
		return -EINVAL;
	}

	memcpy(skb_push(skb, 1), &skb->cb[0], 1);
	skb_queue_tail(&fmdev->rx_q, skb);
	tasklet_schedule(&fmdev->rx_task);

	return 0;
}

/*
 * Called by ST layer to indicate protocol registration completion
 * status.
 */
static void fm_st_reg_comp_cb(void *arg, char data)
{
	struct fmdev *fmdev;

	fmdev = (struct fmdev *)arg;
	fmdev->streg_cbdata = data;
	complete(&wait_for_fmdrv_reg_comp);
}

/*
 * This function will be called from FM V4L2 open function.
 * Register with ST driver and initialize driver data.
 */
u32 fmc_prepare(struct fmdev *fmdev)
{
	static struct st_proto_s fm_st_proto;
	u32 ret;

	if (test_bit(FM_CORE_READY, &fmdev->flag)) {
		fmdbg("FM Core is already up\n");
		return 0;
	}

	memset(&fm_st_proto, 0, sizeof(fm_st_proto));
	fm_st_proto.recv = fm_st_receive;
	fm_st_proto.match_packet = NULL;
	fm_st_proto.reg_complete_cb = fm_st_reg_comp_cb;
	fm_st_proto.write = NULL; /* TI ST driver will fill write pointer */
	fm_st_proto.priv_data = fmdev;
	fm_st_proto.chnl_id = 0x08;
	fm_st_proto.max_frame_size = 0xff;
	fm_st_proto.hdr_len = 1;
	fm_st_proto.offset_len_in_hdr = 0;
	fm_st_proto.len_size = 1;
	fm_st_proto.reserve = 1;

	ret = st_register(&fm_st_proto);
	if (ret == -EINPROGRESS) {
		init_completion(&wait_for_fmdrv_reg_comp);
		fmdev->streg_cbdata = -EINPROGRESS;
		fmdbg("%s waiting for ST reg completion signal\n", __func__);

		ret = wait_for_completion_timeout(&wait_for_fmdrv_reg_comp,
				FM_ST_REG_TIMEOUT);

		if (!ret) {
			fmerr("Timeout(%d sec), didn't get reg "
					"completion signal from ST\n",
					jiffies_to_msecs(FM_ST_REG_TIMEOUT) / 1000);
			return -ETIMEDOUT;
		}
		if (fmdev->streg_cbdata != 0) {
			fmerr("ST reg comp CB called with error "
					"status %d\n", fmdev->streg_cbdata);
			return -EAGAIN;
		}

		ret = 0;
	} else if (ret == -1) {
		fmerr("st_register failed %d\n", ret);
		return -EAGAIN;
	}

	if (fm_st_proto.write != NULL) {
		g_st_write = fm_st_proto.write;
	} else {
		fmerr("Failed to get ST write func pointer\n");
		ret = st_unregister(&fm_st_proto);
		if (ret < 0)
			fmerr("st_unregister failed %d\n", ret);
		return -EAGAIN;
	}

	spin_lock_init(&fmdev->rds_buff_lock);
	spin_lock_init(&fmdev->resp_skb_lock);

	/* Initialize TX queue and TX tasklet */
	skb_queue_head_init(&fmdev->tx_q);
	tasklet_init(&fmdev->tx_task, send_tasklet, (unsigned long)fmdev);

	/* Initialize RX Queue and RX tasklet */
	skb_queue_head_init(&fmdev->rx_q);
	tasklet_init(&fmdev->rx_task, recv_tasklet, (unsigned long)fmdev);

	fmdev->irq_info.stage = 0;
	atomic_set(&fmdev->tx_cnt, 1);
	fmdev->resp_comp = NULL;

	init_timer(&fmdev->irq_info.timer);
	fmdev->irq_info.timer.function = &int_timeout_handler;
	fmdev->irq_info.timer.data = (unsigned long)fmdev;
	/*TODO: add FM_STIC_EVENT later */
	fmdev->irq_info.mask = FM_MAL_EVENT;

	/* Region info */
	memcpy(&fmdev->rx.region, &region_configs[default_radio_region],
			sizeof(struct region_info));

	fmdev->rx.mute_mode = FM_MUTE_OFF;
	fmdev->rx.rf_depend_mute = FM_RX_RF_DEPENDENT_MUTE_OFF;
	fmdev->rx.rds.flag = FM_RDS_DISABLE;
	fmdev->rx.freq = FM_UNDEFINED_FREQ;
	fmdev->rx.rds_mode = FM_RDS_SYSTEM_RDS;
	fmdev->rx.af_mode = FM_RX_RDS_AF_SWITCH_MODE_OFF;
	fmdev->irq_info.retry = 0;

	fm_rx_reset_rds_cache(fmdev);
	init_waitqueue_head(&fmdev->rx.rds.read_queue);

	fm_rx_reset_station_info(fmdev);
	set_bit(FM_CORE_READY, &fmdev->flag);

	return ret;
}

/*
 * This function will be called from FM V4L2 release function.
 * Unregister from ST driver.
 */
u32 fmc_release(struct fmdev *fmdev)
{
	static struct st_proto_s fm_st_proto;
	u32 ret;

	if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
		fmdbg("FM Core is already down\n");
		return 0;
	}
	/* Service pending read */
	wake_up_interruptible(&fmdev->rx.rds.read_queue);

	tasklet_kill(&fmdev->tx_task);
	tasklet_kill(&fmdev->rx_task);

	skb_queue_purge(&fmdev->tx_q);
	skb_queue_purge(&fmdev->rx_q);

	fmdev->resp_comp = NULL;
	fmdev->rx.freq = 0;

	memset(&fm_st_proto, 0, sizeof(fm_st_proto));
	fm_st_proto.chnl_id = 0x08;

	ret = st_unregister(&fm_st_proto);

	if (ret < 0)
		fmerr("Failed to de-register FM from ST %d\n", ret);
	else
		fmdbg("Successfully unregistered from ST\n");

	clear_bit(FM_CORE_READY, &fmdev->flag);
	return ret;
}

/*
 * Module init function. Ask FM V4L module to register video device.
 * Allocate memory for FM driver context and RX RDS buffer.
 */
static int __init fm_drv_init(void)
{
	struct fmdev *fmdev = NULL;
	u32 ret = -ENOMEM;

	fmdbg("FM driver version %s\n", FM_DRV_VERSION);

	fmdev = kzalloc(sizeof(struct fmdev), GFP_KERNEL);
	if (NULL == fmdev) {
		fmerr("Can't allocate operation structure memory\n");
		return ret;
	}
	fmdev->rx.rds.buf_size = default_rds_buf * FM_RDS_BLK_SIZE;
	fmdev->rx.rds.buff = kzalloc(fmdev->rx.rds.buf_size, GFP_KERNEL);
	if (NULL == fmdev->rx.rds.buff) {
		fmerr("Can't allocate rds ring buffer\n");
		goto rel_dev;
	}

	ret = fm_v4l2_init_video_device(fmdev, radio_nr);
	if (ret < 0)
		goto rel_rdsbuf;

	fmdev->irq_info.handlers = int_handler_table;
	fmdev->curr_fmmode = FM_MODE_OFF;
	fmdev->tx_data.pwr_lvl = FM_PWR_LVL_DEF;
	fmdev->tx_data.preemph = FM_TX_PREEMPH_50US;
	return ret;

rel_rdsbuf:
	kfree(fmdev->rx.rds.buff);
rel_dev:
	kfree(fmdev);

	return ret;
}

/* Module exit function. Ask FM V4L module to unregister video device */
static void __exit fm_drv_exit(void)
{
	struct fmdev *fmdev = NULL;

	fmdev = fm_v4l2_deinit_video_device();
	if (fmdev != NULL) {
		kfree(fmdev->rx.rds.buff);
		kfree(fmdev);
	}
}

module_init(fm_drv_init);
module_exit(fm_drv_exit);

/* ------------- Module Info ------------- */
MODULE_AUTHOR("Manjunatha Halli <manjunatha_halli@ti.com>");
MODULE_DESCRIPTION("FM Driver for TI's Connectivity chip. " FM_DRV_VERSION);
MODULE_VERSION(FM_DRV_VERSION);
MODULE_LICENSE("GPL");