Stuck at home?

Check our new online training!

Stuck at home?

All Bootlin training courses
are now available
through on-line seminars

Bootlin logo

Elixir Cross Referencer

   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
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
/*
 * Marvell Wireless LAN device driver: SDIO specific handling
 *
 * Copyright (C) 2011, 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/firmware.h>

#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"
#include "11n.h"
#include "sdio.h"


#define SDIO_VERSION	"1.0"

/* The mwifiex_sdio_remove() callback function is called when
 * user removes this module from kernel space or ejects
 * the card from the slot. The driver handles these 2 cases
 * differently.
 * If the user is removing the module, the few commands (FUNC_SHUTDOWN,
 * HS_CANCEL etc.) are sent to the firmware.
 * If the card is removed, there is no need to send these command.
 *
 * The variable 'user_rmmod' is used to distinguish these two
 * scenarios. This flag is initialized as FALSE in case the card
 * is removed, and will be set to TRUE for module removal when
 * module_exit function is called.
 */
static u8 user_rmmod;

static struct mwifiex_if_ops sdio_ops;

static struct semaphore add_remove_card_sem;

/*
 * SDIO probe.
 *
 * This function probes an mwifiex device and registers it. It allocates
 * the card structure, enables SDIO function number and initiates the
 * device registration and initialization procedure by adding a logical
 * interface.
 */
static int
mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
{
	int ret;
	struct sdio_mmc_card *card = NULL;

	pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
		 func->vendor, func->device, func->class, func->num);

	card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
	if (!card)
		return -ENOMEM;

	card->func = func;

	func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;

	if (id->driver_data) {
		struct mwifiex_sdio_device *data = (void *)id->driver_data;

		card->firmware = data->firmware;
		card->reg = data->reg;
		card->max_ports = data->max_ports;
		card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
		card->supports_sdio_new_mode = data->supports_sdio_new_mode;
		card->has_control_mask = data->has_control_mask;
	}

	sdio_claim_host(func);
	ret = sdio_enable_func(func);
	sdio_release_host(func);

	if (ret) {
		pr_err("%s: failed to enable function\n", __func__);
		kfree(card);
		return -EIO;
	}

	if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
			     MWIFIEX_SDIO)) {
		pr_err("%s: add card failed\n", __func__);
		kfree(card);
		sdio_claim_host(func);
		ret = sdio_disable_func(func);
		sdio_release_host(func);
		ret = -1;
	}

	return ret;
}

/*
 * SDIO resume.
 *
 * Kernel needs to suspend all functions separately. Therefore all
 * registered functions must have drivers with suspend and resume
 * methods. Failing that the kernel simply removes the whole card.
 *
 * If already not resumed, this function turns on the traffic and
 * sends a host sleep cancel request to the firmware.
 */
static int mwifiex_sdio_resume(struct device *dev)
{
	struct sdio_func *func = dev_to_sdio_func(dev);
	struct sdio_mmc_card *card;
	struct mwifiex_adapter *adapter;
	mmc_pm_flag_t pm_flag = 0;

	if (func) {
		pm_flag = sdio_get_host_pm_caps(func);
		card = sdio_get_drvdata(func);
		if (!card || !card->adapter) {
			pr_err("resume: invalid card or adapter\n");
			return 0;
		}
	} else {
		pr_err("resume: sdio_func is not specified\n");
		return 0;
	}

	adapter = card->adapter;

	if (!adapter->is_suspended) {
		dev_warn(adapter->dev, "device already resumed\n");
		return 0;
	}

	adapter->is_suspended = false;

	/* Disable Host Sleep */
	mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
			  MWIFIEX_ASYNC_CMD);

	return 0;
}

/*
 * SDIO remove.
 *
 * This function removes the interface and frees up the card structure.
 */
static void
mwifiex_sdio_remove(struct sdio_func *func)
{
	struct sdio_mmc_card *card;
	struct mwifiex_adapter *adapter;
	struct mwifiex_private *priv;
	int i;

	pr_debug("info: SDIO func num=%d\n", func->num);

	card = sdio_get_drvdata(func);
	if (!card)
		return;

	adapter = card->adapter;
	if (!adapter || !adapter->priv_num)
		return;

	/* In case driver is removed when asynchronous FW load is in progress */
	wait_for_completion(&adapter->fw_load);

	if (user_rmmod) {
		if (adapter->is_suspended)
			mwifiex_sdio_resume(adapter->dev);

		for (i = 0; i < adapter->priv_num; i++)
			if ((GET_BSS_ROLE(adapter->priv[i]) ==
						MWIFIEX_BSS_ROLE_STA) &&
			    adapter->priv[i]->media_connected)
				mwifiex_deauthenticate(adapter->priv[i], NULL);

		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
		mwifiex_disable_auto_ds(priv);
		mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
	}

	mwifiex_remove_card(card->adapter, &add_remove_card_sem);
}

/*
 * SDIO suspend.
 *
 * Kernel needs to suspend all functions separately. Therefore all
 * registered functions must have drivers with suspend and resume
 * methods. Failing that the kernel simply removes the whole card.
 *
 * If already not suspended, this function allocates and sends a host
 * sleep activate request to the firmware and turns off the traffic.
 */
static int mwifiex_sdio_suspend(struct device *dev)
{
	struct sdio_func *func = dev_to_sdio_func(dev);
	struct sdio_mmc_card *card;
	struct mwifiex_adapter *adapter;
	mmc_pm_flag_t pm_flag = 0;
	int ret = 0;

	if (func) {
		pm_flag = sdio_get_host_pm_caps(func);
		pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
			 sdio_func_id(func), pm_flag);
		if (!(pm_flag & MMC_PM_KEEP_POWER)) {
			pr_err("%s: cannot remain alive while host is"
				" suspended\n", sdio_func_id(func));
			return -ENOSYS;
		}

		card = sdio_get_drvdata(func);
		if (!card || !card->adapter) {
			pr_err("suspend: invalid card or adapter\n");
			return 0;
		}
	} else {
		pr_err("suspend: sdio_func is not specified\n");
		return 0;
	}

	adapter = card->adapter;

	/* Enable the Host Sleep */
	if (!mwifiex_enable_hs(adapter)) {
		dev_err(adapter->dev, "cmd: failed to suspend\n");
		return -EFAULT;
	}

	dev_dbg(adapter->dev, "cmd: suspend with MMC_PM_KEEP_POWER\n");
	ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);

	/* Indicate device suspended */
	adapter->is_suspended = true;

	return ret;
}

/* Device ID for SD8786 */
#define SDIO_DEVICE_ID_MARVELL_8786   (0x9116)
/* Device ID for SD8787 */
#define SDIO_DEVICE_ID_MARVELL_8787   (0x9119)
/* Device ID for SD8797 */
#define SDIO_DEVICE_ID_MARVELL_8797   (0x9129)
/* Device ID for SD8897 */
#define SDIO_DEVICE_ID_MARVELL_8897   (0x912d)

/* WLAN IDs */
static const struct sdio_device_id mwifiex_ids[] = {
	{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
		.driver_data = (unsigned long) &mwifiex_sdio_sd8786},
	{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
		.driver_data = (unsigned long) &mwifiex_sdio_sd8787},
	{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
		.driver_data = (unsigned long) &mwifiex_sdio_sd8797},
	{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
		.driver_data = (unsigned long) &mwifiex_sdio_sd8897},
	{},
};

MODULE_DEVICE_TABLE(sdio, mwifiex_ids);

static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
	.suspend = mwifiex_sdio_suspend,
	.resume = mwifiex_sdio_resume,
};

static struct sdio_driver mwifiex_sdio = {
	.name = "mwifiex_sdio",
	.id_table = mwifiex_ids,
	.probe = mwifiex_sdio_probe,
	.remove = mwifiex_sdio_remove,
	.drv = {
		.owner = THIS_MODULE,
		.pm = &mwifiex_sdio_pm_ops,
	}
};

/* Write data into SDIO card register. Caller claims SDIO device. */
static int
mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
{
	int ret = -1;
	sdio_writeb(func, data, reg, &ret);
	return ret;
}

/*
 * This function writes data into SDIO card register.
 */
static int
mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret;

	sdio_claim_host(card->func);
	ret = mwifiex_write_reg_locked(card->func, reg, data);
	sdio_release_host(card->func);

	return ret;
}

/*
 * This function reads data from SDIO card register.
 */
static int
mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret = -1;
	u8 val;

	sdio_claim_host(card->func);
	val = sdio_readb(card->func, reg, &ret);
	sdio_release_host(card->func);

	*data = val;

	return ret;
}

/*
 * This function writes multiple data into SDIO card memory.
 *
 * This does not work in suspended mode.
 */
static int
mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
			u8 *buffer, u32 pkt_len, u32 port)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret;
	u8 blk_mode =
		(port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
	u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
	u32 blk_cnt =
		(blk_mode ==
		 BLOCK_MODE) ? (pkt_len /
				MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
	u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);

	if (adapter->is_suspended) {
		dev_err(adapter->dev,
			"%s: not allowed while suspended\n", __func__);
		return -1;
	}

	sdio_claim_host(card->func);

	ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);

	sdio_release_host(card->func);

	return ret;
}

/*
 * This function reads multiple data from SDIO card memory.
 */
static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
				  u32 len, u32 port, u8 claim)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret;
	u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
		       : BLOCK_MODE;
	u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
	u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
			: len;
	u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);

	if (claim)
		sdio_claim_host(card->func);

	ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);

	if (claim)
		sdio_release_host(card->func);

	return ret;
}

/*
 * This function wakes up the card.
 *
 * A host power up command is written to the card configuration
 * register to wake up the card.
 */
static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
{
	dev_dbg(adapter->dev, "event: wakeup device...\n");

	return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
}

/*
 * This function is called after the card has woken up.
 *
 * The card configuration register is reset.
 */
static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
{
	dev_dbg(adapter->dev, "cmd: wakeup device completed\n");

	return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
}

/*
 * This function is used to initialize IO ports for the
 * chipsets supporting SDIO new mode eg SD8897.
 */
static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
{
	u8 reg;

	adapter->ioport = MEM_PORT;

	/* enable sdio new mode */
	if (mwifiex_read_reg(adapter, CARD_CONFIG_2_1_REG, &reg))
		return -1;
	if (mwifiex_write_reg(adapter, CARD_CONFIG_2_1_REG,
			      reg | CMD53_NEW_MODE))
		return -1;

	/* Configure cmd port and enable reading rx length from the register */
	if (mwifiex_read_reg(adapter, CMD_CONFIG_0, &reg))
		return -1;
	if (mwifiex_write_reg(adapter, CMD_CONFIG_0, reg | CMD_PORT_RD_LEN_EN))
		return -1;

	/* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
	 * completed
	 */
	if (mwifiex_read_reg(adapter, CMD_CONFIG_1, &reg))
		return -1;
	if (mwifiex_write_reg(adapter, CMD_CONFIG_1, reg | CMD_PORT_AUTO_EN))
		return -1;

	return 0;
}

/* This function initializes the IO ports.
 *
 * The following operations are performed -
 *      - Read the IO ports (0, 1 and 2)
 *      - Set host interrupt Reset-To-Read to clear
 *      - Set auto re-enable interrupt
 */
static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
{
	u8 reg;
	struct sdio_mmc_card *card = adapter->card;

	adapter->ioport = 0;

	if (card->supports_sdio_new_mode) {
		if (mwifiex_init_sdio_new_mode(adapter))
			return -1;
		goto cont;
	}

	/* Read the IO port */
	if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, &reg))
		adapter->ioport |= (reg & 0xff);
	else
		return -1;

	if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, &reg))
		adapter->ioport |= ((reg & 0xff) << 8);
	else
		return -1;

	if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, &reg))
		adapter->ioport |= ((reg & 0xff) << 16);
	else
		return -1;
cont:
	pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);

	/* Set Host interrupt reset to read to clear */
	if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, &reg))
		mwifiex_write_reg(adapter, HOST_INT_RSR_REG,
				  reg | card->reg->sdio_int_mask);
	else
		return -1;

	/* Dnld/Upld ready set to auto reset */
	if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
		mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
				  reg | AUTO_RE_ENABLE_INT);
	else
		return -1;

	return 0;
}

/*
 * This function sends data to the card.
 */
static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
				      u8 *payload, u32 pkt_len, u32 port)
{
	u32 i = 0;
	int ret;

	do {
		ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
		if (ret) {
			i++;
			dev_err(adapter->dev, "host_to_card, write iomem"
					" (%d) failed: %d\n", i, ret);
			if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
				dev_err(adapter->dev, "write CFG reg failed\n");

			ret = -1;
			if (i > MAX_WRITE_IOMEM_RETRY)
				return ret;
		}
	} while (ret == -1);

	return ret;
}

/*
 * This function gets the read port.
 *
 * If control port bit is set in MP read bitmap, the control port
 * is returned, otherwise the current read port is returned and
 * the value is increased (provided it does not reach the maximum
 * limit, in which case it is reset to 1)
 */
static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
{
	struct sdio_mmc_card *card = adapter->card;
	const struct mwifiex_sdio_card_reg *reg = card->reg;
	u32 rd_bitmap = card->mp_rd_bitmap;

	dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);

	if (card->supports_sdio_new_mode) {
		if (!(rd_bitmap & reg->data_port_mask))
			return -1;
	} else {
		if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
			return -1;
	}

	if ((card->has_control_mask) &&
	    (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
		card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
		*port = CTRL_PORT;
		dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%08x\n",
			*port, card->mp_rd_bitmap);
		return 0;
	}

	if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
		return -1;

	/* We are now handling the SDIO data ports */
	card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
	*port = card->curr_rd_port;

	if (++card->curr_rd_port == card->max_ports)
		card->curr_rd_port = reg->start_rd_port;

	dev_dbg(adapter->dev,
		"data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
		*port, rd_bitmap, card->mp_rd_bitmap);

	return 0;
}

/*
 * This function gets the write port for data.
 *
 * The current write port is returned if available and the value is
 * increased (provided it does not reach the maximum limit, in which
 * case it is reset to 1)
 */
static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
{
	struct sdio_mmc_card *card = adapter->card;
	const struct mwifiex_sdio_card_reg *reg = card->reg;
	u32 wr_bitmap = card->mp_wr_bitmap;

	dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);

	if (card->supports_sdio_new_mode &&
	    !(wr_bitmap & reg->data_port_mask)) {
		adapter->data_sent = true;
		return -EBUSY;
	} else if (!card->supports_sdio_new_mode &&
		   !(wr_bitmap & card->mp_data_port_mask)) {
		return -1;
	}

	if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
		card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
		*port = card->curr_wr_port;
		if (((card->supports_sdio_new_mode) &&
		     (++card->curr_wr_port == card->max_ports)) ||
		    ((!card->supports_sdio_new_mode) &&
		     (++card->curr_wr_port == card->mp_end_port)))
			card->curr_wr_port = reg->start_wr_port;
	} else {
		adapter->data_sent = true;
		return -EBUSY;
	}

	if ((card->has_control_mask) && (*port == CTRL_PORT)) {
		dev_err(adapter->dev,
			"invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
			*port, card->curr_wr_port, wr_bitmap,
			card->mp_wr_bitmap);
		return -1;
	}

	dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
		*port, wr_bitmap, card->mp_wr_bitmap);

	return 0;
}

/*
 * This function polls the card status.
 */
static int
mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
{
	struct sdio_mmc_card *card = adapter->card;
	u32 tries;
	u8 cs;

	for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
		if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
			break;
		else if ((cs & bits) == bits)
			return 0;

		usleep_range(10, 20);
	}

	dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);

	return -1;
}

/*
 * This function reads the firmware status.
 */
static int
mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
{
	struct sdio_mmc_card *card = adapter->card;
	const struct mwifiex_sdio_card_reg *reg = card->reg;
	u8 fws0, fws1;

	if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
		return -1;

	if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
		return -1;

	*dat = (u16) ((fws1 << 8) | fws0);

	return 0;
}

/*
 * This function disables the host interrupt.
 *
 * The host interrupt mask is read, the disable bit is reset and
 * written back to the card host interrupt mask register.
 */
static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;
	struct sdio_func *func = card->func;

	sdio_claim_host(func);
	mwifiex_write_reg_locked(func, HOST_INT_MASK_REG, 0);
	sdio_release_irq(func);
	sdio_release_host(func);
}

/*
 * This function reads the interrupt status from card.
 */
static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;
	u8 sdio_ireg;
	unsigned long flags;

	if (mwifiex_read_data_sync(adapter, card->mp_regs,
				   card->reg->max_mp_regs,
				   REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
		dev_err(adapter->dev, "read mp_regs failed\n");
		return;
	}

	sdio_ireg = card->mp_regs[HOST_INTSTATUS_REG];
	if (sdio_ireg) {
		/*
		 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
		 * For SDIO new mode CMD port interrupts
		 *	DN_LD_CMD_PORT_HOST_INT_STATUS and/or
		 *	UP_LD_CMD_PORT_HOST_INT_STATUS
		 * Clear the interrupt status register
		 */
		dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg);
		spin_lock_irqsave(&adapter->int_lock, flags);
		adapter->int_status |= sdio_ireg;
		spin_unlock_irqrestore(&adapter->int_lock, flags);
	}
}

/*
 * SDIO interrupt handler.
 *
 * This function reads the interrupt status from firmware and handles
 * the interrupt in current thread (ksdioirqd) right away.
 */
static void
mwifiex_sdio_interrupt(struct sdio_func *func)
{
	struct mwifiex_adapter *adapter;
	struct sdio_mmc_card *card;

	card = sdio_get_drvdata(func);
	if (!card || !card->adapter) {
		pr_debug("int: func=%p card=%p adapter=%p\n",
			 func, card, card ? card->adapter : NULL);
		return;
	}
	adapter = card->adapter;

	if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
		adapter->ps_state = PS_STATE_AWAKE;

	mwifiex_interrupt_status(adapter);
	mwifiex_main_process(adapter);
}

/*
 * This function enables the host interrupt.
 *
 * The host interrupt enable mask is written to the card
 * host interrupt mask register.
 */
static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;
	struct sdio_func *func = card->func;
	int ret;

	sdio_claim_host(func);

	/* Request the SDIO IRQ */
	ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
	if (ret) {
		dev_err(adapter->dev, "claim irq failed: ret=%d\n", ret);
		goto out;
	}

	/* Simply write the mask to the register */
	ret = mwifiex_write_reg_locked(func, HOST_INT_MASK_REG,
				       card->reg->host_int_enable);
	if (ret) {
		dev_err(adapter->dev, "enable host interrupt failed\n");
		sdio_release_irq(func);
	}

out:
	sdio_release_host(func);
	return ret;
}

/*
 * This function sends a data buffer to the card.
 */
static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
				     u32 *type, u8 *buffer,
				     u32 npayload, u32 ioport)
{
	int ret;
	u32 nb;

	if (!buffer) {
		dev_err(adapter->dev, "%s: buffer is NULL\n", __func__);
		return -1;
	}

	ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);

	if (ret) {
		dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__,
			ret);
		return -1;
	}

	nb = le16_to_cpu(*(__le16 *) (buffer));
	if (nb > npayload) {
		dev_err(adapter->dev, "%s: invalid packet, nb=%d npayload=%d\n",
			__func__, nb, npayload);
		return -1;
	}

	*type = le16_to_cpu(*(__le16 *) (buffer + 2));

	return ret;
}

/*
 * This function downloads the firmware to the card.
 *
 * Firmware is downloaded to the card in blocks. Every block download
 * is tested for CRC errors, and retried a number of times before
 * returning failure.
 */
static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
				    struct mwifiex_fw_image *fw)
{
	struct sdio_mmc_card *card = adapter->card;
	const struct mwifiex_sdio_card_reg *reg = card->reg;
	int ret;
	u8 *firmware = fw->fw_buf;
	u32 firmware_len = fw->fw_len;
	u32 offset = 0;
	u8 base0, base1;
	u8 *fwbuf;
	u16 len = 0;
	u32 txlen, tx_blocks = 0, tries;
	u32 i = 0;

	if (!firmware_len) {
		dev_err(adapter->dev,
			"firmware image not found! Terminating download\n");
		return -1;
	}

	dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
		firmware_len);

	/* Assume that the allocated buffer is 8-byte aligned */
	fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
	if (!fwbuf)
		return -ENOMEM;

	/* Perform firmware data transfer */
	do {
		/* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
		   bits */
		ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
						    DN_LD_CARD_RDY);
		if (ret) {
			dev_err(adapter->dev, "FW download with helper:"
				" poll status timeout @ %d\n", offset);
			goto done;
		}

		/* More data? */
		if (offset >= firmware_len)
			break;

		for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
			ret = mwifiex_read_reg(adapter, reg->base_0_reg,
					       &base0);
			if (ret) {
				dev_err(adapter->dev,
					"dev BASE0 register read failed: "
					"base0=%#04X(%d). Terminating dnld\n",
					base0, base0);
				goto done;
			}
			ret = mwifiex_read_reg(adapter, reg->base_1_reg,
					       &base1);
			if (ret) {
				dev_err(adapter->dev,
					"dev BASE1 register read failed: "
					"base1=%#04X(%d). Terminating dnld\n",
					base1, base1);
				goto done;
			}
			len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));

			if (len)
				break;

			usleep_range(10, 20);
		}

		if (!len) {
			break;
		} else if (len > MWIFIEX_UPLD_SIZE) {
			dev_err(adapter->dev,
				"FW dnld failed @ %d, invalid length %d\n",
				offset, len);
			ret = -1;
			goto done;
		}

		txlen = len;

		if (len & BIT(0)) {
			i++;
			if (i > MAX_WRITE_IOMEM_RETRY) {
				dev_err(adapter->dev,
					"FW dnld failed @ %d, over max retry\n",
					offset);
				ret = -1;
				goto done;
			}
			dev_err(adapter->dev, "CRC indicated by the helper:"
				" len = 0x%04X, txlen = %d\n", len, txlen);
			len &= ~BIT(0);
			/* Setting this to 0 to resend from same offset */
			txlen = 0;
		} else {
			i = 0;

			/* Set blocksize to transfer - checking for last
			   block */
			if (firmware_len - offset < txlen)
				txlen = firmware_len - offset;

			tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
				    / MWIFIEX_SDIO_BLOCK_SIZE;

			/* Copy payload to buffer */
			memmove(fwbuf, &firmware[offset], txlen);
		}

		ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
					      MWIFIEX_SDIO_BLOCK_SIZE,
					      adapter->ioport);
		if (ret) {
			dev_err(adapter->dev,
				"FW download, write iomem (%d) failed @ %d\n",
				i, offset);
			if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
				dev_err(adapter->dev, "write CFG reg failed\n");

			ret = -1;
			goto done;
		}

		offset += txlen;
	} while (true);

	dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n",
		offset);

	ret = 0;
done:
	kfree(fwbuf);
	return ret;
}

/*
 * This function checks the firmware status in card.
 *
 * The winner interface is also determined by this function.
 */
static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
				   u32 poll_num)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret = 0;
	u16 firmware_stat;
	u32 tries;
	u8 winner_status;

	/* Wait for firmware initialization event */
	for (tries = 0; tries < poll_num; tries++) {
		ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
		if (ret)
			continue;
		if (firmware_stat == FIRMWARE_READY_SDIO) {
			ret = 0;
			break;
		} else {
			msleep(100);
			ret = -1;
		}
	}

	if (ret) {
		if (mwifiex_read_reg
		    (adapter, card->reg->status_reg_0, &winner_status))
			winner_status = 0;

		if (winner_status)
			adapter->winner = 0;
		else
			adapter->winner = 1;
	}
	return ret;
}

/*
 * This function decodes a received packet.
 *
 * Based on the type, the packet is treated as either a data, or
 * a command response, or an event, and the correct handler
 * function is invoked.
 */
static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
				    struct sk_buff *skb, u32 upld_typ)
{
	u8 *cmd_buf;
	__le16 *curr_ptr = (__le16 *)skb->data;
	u16 pkt_len = le16_to_cpu(*curr_ptr);

	skb_trim(skb, pkt_len);
	skb_pull(skb, INTF_HEADER_LEN);

	switch (upld_typ) {
	case MWIFIEX_TYPE_DATA:
		dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
		mwifiex_handle_rx_packet(adapter, skb);
		break;

	case MWIFIEX_TYPE_CMD:
		dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
		/* take care of curr_cmd = NULL case */
		if (!adapter->curr_cmd) {
			cmd_buf = adapter->upld_buf;

			if (adapter->ps_state == PS_STATE_SLEEP_CFM)
				mwifiex_process_sleep_confirm_resp(adapter,
								   skb->data,
								   skb->len);

			memcpy(cmd_buf, skb->data,
			       min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
				     skb->len));

			dev_kfree_skb_any(skb);
		} else {
			adapter->cmd_resp_received = true;
			adapter->curr_cmd->resp_skb = skb;
		}
		break;

	case MWIFIEX_TYPE_EVENT:
		dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
		adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);

		if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
			memcpy(adapter->event_body,
			       skb->data + MWIFIEX_EVENT_HEADER_LEN,
			       skb->len);

		/* event cause has been saved to adapter->event_cause */
		adapter->event_received = true;
		adapter->event_skb = skb;

		break;

	default:
		dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
		dev_kfree_skb_any(skb);
		break;
	}

	return 0;
}

/*
 * This function transfers received packets from card to driver, performing
 * aggregation if required.
 *
 * For data received on control port, or if aggregation is disabled, the
 * received buffers are uploaded as separate packets. However, if aggregation
 * is enabled and required, the buffers are copied onto an aggregation buffer,
 * provided there is space left, processed and finally uploaded.
 */
static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
					     struct sk_buff *skb, u8 port)
{
	struct sdio_mmc_card *card = adapter->card;
	s32 f_do_rx_aggr = 0;
	s32 f_do_rx_cur = 0;
	s32 f_aggr_cur = 0;
	struct sk_buff *skb_deaggr;
	u32 pind;
	u32 pkt_len, pkt_type, mport;
	u8 *curr_ptr;
	u32 rx_len = skb->len;

	if ((card->has_control_mask) && (port == CTRL_PORT)) {
		/* Read the command Resp without aggr */
		dev_dbg(adapter->dev, "info: %s: no aggregation for cmd "
			"response\n", __func__);

		f_do_rx_cur = 1;
		goto rx_curr_single;
	}

	if (!card->mpa_rx.enabled) {
		dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n",
			__func__);

		f_do_rx_cur = 1;
		goto rx_curr_single;
	}

	if ((!card->has_control_mask && (card->mp_rd_bitmap &
					 card->reg->data_port_mask)) ||
	    (card->has_control_mask && (card->mp_rd_bitmap &
					(~((u32) CTRL_PORT_MASK))))) {
		/* Some more data RX pending */
		dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__);

		if (MP_RX_AGGR_IN_PROGRESS(card)) {
			if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) {
				f_aggr_cur = 1;
			} else {
				/* No room in Aggr buf, do rx aggr now */
				f_do_rx_aggr = 1;
				f_do_rx_cur = 1;
			}
		} else {
			/* Rx aggr not in progress */
			f_aggr_cur = 1;
		}

	} else {
		/* No more data RX pending */
		dev_dbg(adapter->dev, "info: %s: last packet\n", __func__);

		if (MP_RX_AGGR_IN_PROGRESS(card)) {
			f_do_rx_aggr = 1;
			if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len))
				f_aggr_cur = 1;
			else
				/* No room in Aggr buf, do rx aggr now */
				f_do_rx_cur = 1;
		} else {
			f_do_rx_cur = 1;
		}
	}

	if (f_aggr_cur) {
		dev_dbg(adapter->dev, "info: current packet aggregation\n");
		/* Curr pkt can be aggregated */
		mp_rx_aggr_setup(card, skb, port);

		if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
		    mp_rx_aggr_port_limit_reached(card)) {
			dev_dbg(adapter->dev, "info: %s: aggregated packet "
				"limit reached\n", __func__);
			/* No more pkts allowed in Aggr buf, rx it */
			f_do_rx_aggr = 1;
		}
	}

	if (f_do_rx_aggr) {
		/* do aggr RX now */
		dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n",
			card->mpa_rx.pkt_cnt);

		if (card->supports_sdio_new_mode) {
			int i;
			u32 port_count;

			for (i = 0, port_count = 0; i < card->max_ports; i++)
				if (card->mpa_rx.ports & BIT(i))
					port_count++;

			/* Reading data from "start_port + 0" to "start_port +
			 * port_count -1", so decrease the count by 1
			 */
			port_count--;
			mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
				 (port_count << 8)) + card->mpa_rx.start_port;
		} else {
			mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
				 (card->mpa_rx.ports << 4)) +
				 card->mpa_rx.start_port;
		}

		if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
					   card->mpa_rx.buf_len, mport, 1))
			goto error;

		curr_ptr = card->mpa_rx.buf;

		for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {

			/* get curr PKT len & type */
			pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
			pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);

			/* copy pkt to deaggr buf */
			skb_deaggr = card->mpa_rx.skb_arr[pind];

			if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <=
					 card->mpa_rx.len_arr[pind])) {

				memcpy(skb_deaggr->data, curr_ptr, pkt_len);

				skb_trim(skb_deaggr, pkt_len);

				/* Process de-aggr packet */
				mwifiex_decode_rx_packet(adapter, skb_deaggr,
							 pkt_type);
			} else {
				dev_err(adapter->dev, "wrong aggr pkt:"
					" type=%d len=%d max_len=%d\n",
					pkt_type, pkt_len,
					card->mpa_rx.len_arr[pind]);
				dev_kfree_skb_any(skb_deaggr);
			}
			curr_ptr += card->mpa_rx.len_arr[pind];
		}
		MP_RX_AGGR_BUF_RESET(card);
	}

rx_curr_single:
	if (f_do_rx_cur) {
		dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n",
			port, rx_len);

		if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
					      skb->data, skb->len,
					      adapter->ioport + port))
			goto error;

		mwifiex_decode_rx_packet(adapter, skb, pkt_type);
	}

	return 0;

error:
	if (MP_RX_AGGR_IN_PROGRESS(card)) {
		/* Multiport-aggregation transfer failed - cleanup */
		for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
			/* copy pkt to deaggr buf */
			skb_deaggr = card->mpa_rx.skb_arr[pind];
			dev_kfree_skb_any(skb_deaggr);
		}
		MP_RX_AGGR_BUF_RESET(card);
	}

	if (f_do_rx_cur)
		/* Single transfer pending. Free curr buff also */
		dev_kfree_skb_any(skb);

	return -1;
}

/*
 * This function checks the current interrupt status.
 *
 * The following interrupts are checked and handled by this function -
 *      - Data sent
 *      - Command sent
 *      - Packets received
 *
 * Since the firmware does not generate download ready interrupt if the
 * port updated is command port only, command sent interrupt checking
 * should be done manually, and for every SDIO interrupt.
 *
 * In case of Rx packets received, the packets are uploaded from card to
 * host and processed accordingly.
 */
static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;
	const struct mwifiex_sdio_card_reg *reg = card->reg;
	int ret = 0;
	u8 sdio_ireg;
	struct sk_buff *skb;
	u8 port = CTRL_PORT;
	u32 len_reg_l, len_reg_u;
	u32 rx_blocks;
	u16 rx_len;
	unsigned long flags;
	u32 bitmap;
	u8 cr;

	spin_lock_irqsave(&adapter->int_lock, flags);
	sdio_ireg = adapter->int_status;
	adapter->int_status = 0;
	spin_unlock_irqrestore(&adapter->int_lock, flags);

	if (!sdio_ireg)
		return ret;

	/* Following interrupt is only for SDIO new mode */
	if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
		adapter->cmd_sent = false;

	/* Following interrupt is only for SDIO new mode */
	if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
		u32 pkt_type;

		/* read the len of control packet */
		rx_len = card->mp_regs[CMD_RD_LEN_1] << 8;
		rx_len |= (u16) card->mp_regs[CMD_RD_LEN_0];
		rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
		if (rx_len <= INTF_HEADER_LEN ||
		    (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
		     MWIFIEX_RX_DATA_BUF_SIZE)
			return -1;
		rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);

		skb = dev_alloc_skb(rx_len);
		if (!skb)
			return -1;

		skb_put(skb, rx_len);

		if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
					      skb->len, adapter->ioport |
							CMD_PORT_SLCT)) {
			dev_err(adapter->dev,
				"%s: failed to card_to_host", __func__);
			dev_kfree_skb_any(skb);
			goto term_cmd;
		}

		if ((pkt_type != MWIFIEX_TYPE_CMD) &&
		    (pkt_type != MWIFIEX_TYPE_EVENT))
			dev_err(adapter->dev,
				"%s:Received wrong packet on cmd port",
				__func__);

		mwifiex_decode_rx_packet(adapter, skb, pkt_type);
	}

	if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
		bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
		bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
		if (card->supports_sdio_new_mode) {
			bitmap |=
				((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
			bitmap |=
				((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
		}
		card->mp_wr_bitmap = bitmap;

		dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%x\n",
			card->mp_wr_bitmap);
		if (adapter->data_sent &&
		    (card->mp_wr_bitmap & card->mp_data_port_mask)) {
			dev_dbg(adapter->dev,
				"info:  <--- Tx DONE Interrupt --->\n");
			adapter->data_sent = false;
		}
	}

	/* As firmware will not generate download ready interrupt if the port
	   updated is command port only, cmd_sent should be done for any SDIO
	   interrupt. */
	if (card->has_control_mask && adapter->cmd_sent) {
		/* Check if firmware has attach buffer at command port and
		   update just that in wr_bit_map. */
		card->mp_wr_bitmap |=
			(u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
		if (card->mp_wr_bitmap & CTRL_PORT_MASK)
			adapter->cmd_sent = false;
	}

	dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
		adapter->cmd_sent, adapter->data_sent);
	if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
		bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
		bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
		if (card->supports_sdio_new_mode) {
			bitmap |=
				((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
			bitmap |=
				((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
		}
		card->mp_rd_bitmap = bitmap;
		dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%x\n",
			card->mp_rd_bitmap);

		while (true) {
			ret = mwifiex_get_rd_port(adapter, &port);
			if (ret) {
				dev_dbg(adapter->dev,
					"info: no more rd_port available\n");
				break;
			}
			len_reg_l = reg->rd_len_p0_l + (port << 1);
			len_reg_u = reg->rd_len_p0_u + (port << 1);
			rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
			rx_len |= (u16) card->mp_regs[len_reg_l];
			dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
				port, rx_len);
			rx_blocks =
				(rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
				 1) / MWIFIEX_SDIO_BLOCK_SIZE;
			if (rx_len <= INTF_HEADER_LEN ||
			    (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
			     MWIFIEX_RX_DATA_BUF_SIZE) {
				dev_err(adapter->dev, "invalid rx_len=%d\n",
					rx_len);
				return -1;
			}
			rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);

			skb = dev_alloc_skb(rx_len);

			if (!skb) {
				dev_err(adapter->dev, "%s: failed to alloc skb",
					__func__);
				return -1;
			}

			skb_put(skb, rx_len);

			dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
				rx_len, skb->len);

			if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
							      port)) {
				dev_err(adapter->dev, "card_to_host_mpa failed:"
					" int status=%#x\n", sdio_ireg);
				goto term_cmd;
			}
		}
	}

	return 0;

term_cmd:
	/* terminate cmd */
	if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
		dev_err(adapter->dev, "read CFG reg failed\n");
	else
		dev_dbg(adapter->dev, "info: CFG reg val = %d\n", cr);

	if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
		dev_err(adapter->dev, "write CFG reg failed\n");
	else
		dev_dbg(adapter->dev, "info: write success\n");

	if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
		dev_err(adapter->dev, "read CFG reg failed\n");
	else
		dev_dbg(adapter->dev, "info: CFG reg val =%x\n", cr);

	return -1;
}

/*
 * This function aggregates transmission buffers in driver and downloads
 * the aggregated packet to card.
 *
 * The individual packets are aggregated by copying into an aggregation
 * buffer and then downloaded to the card. Previous unsent packets in the
 * aggregation buffer are pre-copied first before new packets are added.
 * Aggregation is done till there is space left in the aggregation buffer,
 * or till new packets are available.
 *
 * The function will only download the packet to the card when aggregation
 * stops, otherwise it will just aggregate the packet in aggregation buffer
 * and return.
 */
static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
					u8 *payload, u32 pkt_len, u32 port,
					u32 next_pkt_len)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret = 0;
	s32 f_send_aggr_buf = 0;
	s32 f_send_cur_buf = 0;
	s32 f_precopy_cur_buf = 0;
	s32 f_postcopy_cur_buf = 0;
	u32 mport;

	if (!card->mpa_tx.enabled ||
	    (card->has_control_mask && (port == CTRL_PORT)) ||
	    (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
		dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n",
			__func__);

		f_send_cur_buf = 1;
		goto tx_curr_single;
	}

	if (next_pkt_len) {
		/* More pkt in TX queue */
		dev_dbg(adapter->dev, "info: %s: more packets in queue.\n",
			__func__);

		if (MP_TX_AGGR_IN_PROGRESS(card)) {
			if (!mp_tx_aggr_port_limit_reached(card) &&
			    MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
				f_precopy_cur_buf = 1;

				if (!(card->mp_wr_bitmap &
				      (1 << card->curr_wr_port)) ||
				    !MP_TX_AGGR_BUF_HAS_ROOM(
					    card, pkt_len + next_pkt_len))
					f_send_aggr_buf = 1;
			} else {
				/* No room in Aggr buf, send it */
				f_send_aggr_buf = 1;

				if (mp_tx_aggr_port_limit_reached(card) ||
				    !(card->mp_wr_bitmap &
				      (1 << card->curr_wr_port)))
					f_send_cur_buf = 1;
				else
					f_postcopy_cur_buf = 1;
			}
		} else {
			if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
			    (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
				f_precopy_cur_buf = 1;
			else
				f_send_cur_buf = 1;
		}
	} else {
		/* Last pkt in TX queue */
		dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n",
			__func__);

		if (MP_TX_AGGR_IN_PROGRESS(card)) {
			/* some packs in Aggr buf already */
			f_send_aggr_buf = 1;

			if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
				f_precopy_cur_buf = 1;
			else
				/* No room in Aggr buf, send it */
				f_send_cur_buf = 1;
		} else {
			f_send_cur_buf = 1;
		}
	}

	if (f_precopy_cur_buf) {
		dev_dbg(adapter->dev, "data: %s: precopy current buffer\n",
			__func__);
		MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);

		if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
		    mp_tx_aggr_port_limit_reached(card))
			/* No more pkts allowed in Aggr buf, send it */
			f_send_aggr_buf = 1;
	}

	if (f_send_aggr_buf) {
		dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n",
			__func__,
				card->mpa_tx.start_port, card->mpa_tx.ports);
		if (card->supports_sdio_new_mode) {
			u32 port_count;
			int i;

			for (i = 0, port_count = 0; i < card->max_ports; i++)
				if (card->mpa_tx.ports & BIT(i))
					port_count++;

			/* Writing data from "start_port + 0" to "start_port +
			 * port_count -1", so decrease the count by 1
			 */
			port_count--;
			mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
				 (port_count << 8)) + card->mpa_tx.start_port;
		} else {
			mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
				 (card->mpa_tx.ports << 4)) +
				 card->mpa_tx.start_port;
		}

		ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
						 card->mpa_tx.buf_len, mport);

		MP_TX_AGGR_BUF_RESET(card);
	}

tx_curr_single:
	if (f_send_cur_buf) {
		dev_dbg(adapter->dev, "data: %s: send current buffer %d\n",
			__func__, port);
		ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
						 adapter->ioport + port);
	}

	if (f_postcopy_cur_buf) {
		dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n",
			__func__);
		MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
	}

	return ret;
}

/*
 * This function downloads data from driver to card.
 *
 * Both commands and data packets are transferred to the card by this
 * function.
 *
 * This function adds the SDIO specific header to the front of the buffer
 * before transferring. The header contains the length of the packet and
 * the type. The firmware handles the packets based upon this set type.
 */
static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
				     u8 type, struct sk_buff *skb,
				     struct mwifiex_tx_param *tx_param)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret;
	u32 buf_block_len;
	u32 blk_size;
	u32 port = CTRL_PORT;
	u8 *payload = (u8 *)skb->data;
	u32 pkt_len = skb->len;

	/* Allocate buffer and copy payload */
	blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
	buf_block_len = (pkt_len + blk_size - 1) / blk_size;
	*(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
	*(__le16 *)&payload[2] = cpu_to_le16(type);

	/*
	 * This is SDIO specific header
	 *  u16 length,
	 *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
	 *  MWIFIEX_TYPE_EVENT = 3)
	 */
	if (type == MWIFIEX_TYPE_DATA) {
		ret = mwifiex_get_wr_port_data(adapter, &port);
		if (ret) {
			dev_err(adapter->dev, "%s: no wr_port available\n",
				__func__);
			return ret;
		}
	} else {
		adapter->cmd_sent = true;
		/* Type must be MWIFIEX_TYPE_CMD */

		if (pkt_len <= INTF_HEADER_LEN ||
		    pkt_len > MWIFIEX_UPLD_SIZE)
			dev_err(adapter->dev, "%s: payload=%p, nb=%d\n",
				__func__, payload, pkt_len);

		if (card->supports_sdio_new_mode)
			port = CMD_PORT_SLCT;
	}

	/* Transfer data to card */
	pkt_len = buf_block_len * blk_size;

	if (tx_param)
		ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
						   port, tx_param->next_pkt_len
						   );
	else
		ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
						   port, 0);

	if (ret) {
		if (type == MWIFIEX_TYPE_CMD)
			adapter->cmd_sent = false;
		if (type == MWIFIEX_TYPE_DATA)
			adapter->data_sent = false;
	} else {
		if (type == MWIFIEX_TYPE_DATA) {
			if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
				adapter->data_sent = true;
			else
				adapter->data_sent = false;
		}
	}

	return ret;
}

/*
 * This function allocates the MPA Tx and Rx buffers.
 */
static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
				   u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
{
	struct sdio_mmc_card *card = adapter->card;
	int ret = 0;

	card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
	if (!card->mpa_tx.buf) {
		ret = -1;
		goto error;
	}

	card->mpa_tx.buf_size = mpa_tx_buf_size;

	card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
	if (!card->mpa_rx.buf) {
		ret = -1;
		goto error;
	}

	card->mpa_rx.buf_size = mpa_rx_buf_size;

error:
	if (ret) {
		kfree(card->mpa_tx.buf);
		kfree(card->mpa_rx.buf);
	}

	return ret;
}

/*
 * This function unregisters the SDIO device.
 *
 * The SDIO IRQ is released, the function is disabled and driver
 * data is set to null.
 */
static void
mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;

	if (adapter->card) {
		sdio_claim_host(card->func);
		sdio_disable_func(card->func);
		sdio_release_host(card->func);
	}
}

/*
 * This function registers the SDIO device.
 *
 * SDIO IRQ is claimed, block size is set and driver data is initialized.
 */
static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
{
	int ret;
	struct sdio_mmc_card *card = adapter->card;
	struct sdio_func *func = card->func;

	/* save adapter pointer in card */
	card->adapter = adapter;

	sdio_claim_host(func);

	/* Set block size */
	ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
	sdio_release_host(func);
	if (ret) {
		pr_err("cannot set SDIO block size\n");
		return ret;
	}


	adapter->dev = &func->dev;

	strcpy(adapter->fw_name, card->firmware);

	return 0;
}

/*
 * This function initializes the SDIO driver.
 *
 * The following initializations steps are followed -
 *      - Read the Host interrupt status register to acknowledge
 *        the first interrupt got from bootloader
 *      - Disable host interrupt mask register
 *      - Get SDIO port
 *      - Initialize SDIO variables in card
 *      - Allocate MP registers
 *      - Allocate MPA Tx and Rx buffers
 */
static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;
	const struct mwifiex_sdio_card_reg *reg = card->reg;
	int ret;
	u8 sdio_ireg;

	sdio_set_drvdata(card->func, card);

	/*
	 * Read the HOST_INT_STATUS_REG for ACK the first interrupt got
	 * from the bootloader. If we don't do this we get a interrupt
	 * as soon as we register the irq.
	 */
	mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg);

	/* Get SDIO ioport */
	mwifiex_init_sdio_ioport(adapter);

	/* Initialize SDIO variables in card */
	card->mp_rd_bitmap = 0;
	card->mp_wr_bitmap = 0;
	card->curr_rd_port = reg->start_rd_port;
	card->curr_wr_port = reg->start_wr_port;

	card->mp_data_port_mask = reg->data_port_mask;

	card->mpa_tx.buf_len = 0;
	card->mpa_tx.pkt_cnt = 0;
	card->mpa_tx.start_port = 0;

	card->mpa_tx.enabled = 1;
	card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;

	card->mpa_rx.buf_len = 0;
	card->mpa_rx.pkt_cnt = 0;
	card->mpa_rx.start_port = 0;

	card->mpa_rx.enabled = 1;
	card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;

	/* Allocate buffers for SDIO MP-A */
	card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
	if (!card->mp_regs)
		return -ENOMEM;

	/* Allocate skb pointer buffers */
	card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
				       card->mp_agg_pkt_limit, GFP_KERNEL);
	card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
				       card->mp_agg_pkt_limit, GFP_KERNEL);
	ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
					     SDIO_MP_TX_AGGR_DEF_BUF_SIZE,
					     SDIO_MP_RX_AGGR_DEF_BUF_SIZE);
	if (ret) {
		dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
		kfree(card->mp_regs);
		return -1;
	}

	return ret;
}

/*
 * This function resets the MPA Tx and Rx buffers.
 */
static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;

	MP_TX_AGGR_BUF_RESET(card);
	MP_RX_AGGR_BUF_RESET(card);
}

/*
 * This function cleans up the allocated card buffers.
 *
 * The following are freed by this function -
 *      - MP registers
 *      - MPA Tx buffer
 *      - MPA Rx buffer
 */
static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;

	kfree(card->mp_regs);
	kfree(card->mpa_rx.skb_arr);
	kfree(card->mpa_rx.len_arr);
	kfree(card->mpa_tx.buf);
	kfree(card->mpa_rx.buf);
	sdio_set_drvdata(card->func, NULL);
	kfree(card);
}

/*
 * This function updates the MP end port in card.
 */
static void
mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
{
	struct sdio_mmc_card *card = adapter->card;
	const struct mwifiex_sdio_card_reg *reg = card->reg;
	int i;

	card->mp_end_port = port;

	card->mp_data_port_mask = reg->data_port_mask;

	if (reg->start_wr_port) {
		for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
			card->mp_data_port_mask &=
					~(1 << (card->max_ports - i));
	}

	card->curr_wr_port = reg->start_wr_port;

	dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
		port, card->mp_data_port_mask);
}

static struct mmc_host *reset_host;
static void sdio_card_reset_worker(struct work_struct *work)
{
	struct mmc_host *target = reset_host;

	/* The actual reset operation must be run outside of driver thread.
	 * This is because mmc_remove_host() will cause the device to be
	 * instantly destroyed, and the driver then needs to end its thread,
	 * leading to a deadlock.
	 *
	 * We run it in a totally independent workqueue.
	 */

	pr_err("Resetting card...\n");
	mmc_remove_host(target);
	/* 20ms delay is based on experiment with sdhci controller */
	mdelay(20);
	mmc_add_host(target);
}
static DECLARE_WORK(card_reset_work, sdio_card_reset_worker);

/* This function resets the card */
static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
{
	struct sdio_mmc_card *card = adapter->card;

	reset_host = card->func->card->host;
	schedule_work(&card_reset_work);
}

static struct mwifiex_if_ops sdio_ops = {
	.init_if = mwifiex_init_sdio,
	.cleanup_if = mwifiex_cleanup_sdio,
	.check_fw_status = mwifiex_check_fw_status,
	.prog_fw = mwifiex_prog_fw_w_helper,
	.register_dev = mwifiex_register_dev,
	.unregister_dev = mwifiex_unregister_dev,
	.enable_int = mwifiex_sdio_enable_host_int,
	.disable_int = mwifiex_sdio_disable_host_int,
	.process_int_status = mwifiex_process_int_status,
	.host_to_card = mwifiex_sdio_host_to_card,
	.wakeup = mwifiex_pm_wakeup_card,
	.wakeup_complete = mwifiex_pm_wakeup_card_complete,

	/* SDIO specific */
	.update_mp_end_port = mwifiex_update_mp_end_port,
	.cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
	.cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
	.event_complete = mwifiex_sdio_event_complete,
	.card_reset = mwifiex_sdio_card_reset,
};

/*
 * This function initializes the SDIO driver.
 *
 * This initiates the semaphore and registers the device with
 * SDIO bus.
 */
static int
mwifiex_sdio_init_module(void)
{
	sema_init(&add_remove_card_sem, 1);

	/* Clear the flag in case user removes the card. */
	user_rmmod = 0;

	return sdio_register_driver(&mwifiex_sdio);
}

/*
 * This function cleans up the SDIO driver.
 *
 * The following major steps are followed for cleanup -
 *      - Resume the device if its suspended
 *      - Disconnect the device if connected
 *      - Shutdown the firmware
 *      - Unregister the device from SDIO bus.
 */
static void
mwifiex_sdio_cleanup_module(void)
{
	if (!down_interruptible(&add_remove_card_sem))
		up(&add_remove_card_sem);

	/* Set the flag as user is removing this module. */
	user_rmmod = 1;

	cancel_work_sync(&card_reset_work);
	sdio_unregister_driver(&mwifiex_sdio);
}

module_init(mwifiex_sdio_init_module);
module_exit(mwifiex_sdio_cleanup_module);

MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
MODULE_VERSION(SDIO_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);