summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
blob: 4469321c0eb3ea3924f68b02ff6863516ec9b333 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
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
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/printk.h>
#include <linux/pci_ids.h>
#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/card.h>
#include <linux/semaphore.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/bcma/bcma.h>
#include <linux/debugfs.h>
#include <linux/vmalloc.h>
#include <asm/unaligned.h>
#include <defs.h>
#include <brcmu_wifi.h>
#include <brcmu_utils.h>
#include <brcm_hw_ids.h>
#include <soc.h>
#include "sdio_host.h"
#include "sdio_chip.h"

#define DCMD_RESP_TIMEOUT  2000	/* In milli second */

#ifdef DEBUG

#define BRCMF_TRAP_INFO_SIZE	80

#define CBUF_LEN	(128)

/* Device console log buffer state */
#define CONSOLE_BUFFER_MAX	2024

struct rte_log_le {
	__le32 buf;		/* Can't be pointer on (64-bit) hosts */
	__le32 buf_size;
	__le32 idx;
	char *_buf_compat;	/* Redundant pointer for backward compat. */
};

struct rte_console {
	/* Virtual UART
	 * When there is no UART (e.g. Quickturn),
	 * the host should write a complete
	 * input line directly into cbuf and then write
	 * the length into vcons_in.
	 * This may also be used when there is a real UART
	 * (at risk of conflicting with
	 * the real UART).  vcons_out is currently unused.
	 */
	uint vcons_in;
	uint vcons_out;

	/* Output (logging) buffer
	 * Console output is written to a ring buffer log_buf at index log_idx.
	 * The host may read the output when it sees log_idx advance.
	 * Output will be lost if the output wraps around faster than the host
	 * polls.
	 */
	struct rte_log_le log_le;

	/* Console input line buffer
	 * Characters are read one at a time into cbuf
	 * until <CR> is received, then
	 * the buffer is processed as a command line.
	 * Also used for virtual UART.
	 */
	uint cbuf_idx;
	char cbuf[CBUF_LEN];
};

#endif				/* DEBUG */
#include <chipcommon.h>

#include "dhd_bus.h"
#include "dhd_dbg.h"

#define TXQLEN		2048	/* bulk tx queue length */
#define TXHI		(TXQLEN - 256)	/* turn on flow control above TXHI */
#define TXLOW		(TXHI - 256)	/* turn off flow control below TXLOW */
#define PRIOMASK	7

#define TXRETRIES	2	/* # of retries for tx frames */

#define BRCMF_RXBOUND	50	/* Default for max rx frames in
				 one scheduling */

#define BRCMF_TXBOUND	20	/* Default for max tx frames in
				 one scheduling */

#define BRCMF_TXMINMAX	1	/* Max tx frames if rx still pending */

#define MEMBLOCK	2048	/* Block size used for downloading
				 of dongle image */
#define MAX_DATA_BUF	(32 * 1024)	/* Must be large enough to hold
				 biggest possible glom */

#define BRCMF_FIRSTREAD	(1 << 6)


/* SBSDIO_DEVICE_CTL */

/* 1: device will assert busy signal when receiving CMD53 */
#define SBSDIO_DEVCTL_SETBUSY		0x01
/* 1: assertion of sdio interrupt is synchronous to the sdio clock */
#define SBSDIO_DEVCTL_SPI_INTR_SYNC	0x02
/* 1: mask all interrupts to host except the chipActive (rev 8) */
#define SBSDIO_DEVCTL_CA_INT_ONLY	0x04
/* 1: isolate internal sdio signals, put external pads in tri-state; requires
 * sdio bus power cycle to clear (rev 9) */
#define SBSDIO_DEVCTL_PADS_ISO		0x08
/* Force SD->SB reset mapping (rev 11) */
#define SBSDIO_DEVCTL_SB_RST_CTL	0x30
/*   Determined by CoreControl bit */
#define SBSDIO_DEVCTL_RST_CORECTL	0x00
/*   Force backplane reset */
#define SBSDIO_DEVCTL_RST_BPRESET	0x10
/*   Force no backplane reset */
#define SBSDIO_DEVCTL_RST_NOBPRESET	0x20

/* direct(mapped) cis space */

/* MAPPED common CIS address */
#define SBSDIO_CIS_BASE_COMMON		0x1000
/* maximum bytes in one CIS */
#define SBSDIO_CIS_SIZE_LIMIT		0x200
/* cis offset addr is < 17 bits */
#define SBSDIO_CIS_OFT_ADDR_MASK	0x1FFFF

/* manfid tuple length, include tuple, link bytes */
#define SBSDIO_CIS_MANFID_TUPLE_LEN	6

/* intstatus */
#define I_SMB_SW0	(1 << 0)	/* To SB Mail S/W interrupt 0 */
#define I_SMB_SW1	(1 << 1)	/* To SB Mail S/W interrupt 1 */
#define I_SMB_SW2	(1 << 2)	/* To SB Mail S/W interrupt 2 */
#define I_SMB_SW3	(1 << 3)	/* To SB Mail S/W interrupt 3 */
#define I_SMB_SW_MASK	0x0000000f	/* To SB Mail S/W interrupts mask */
#define I_SMB_SW_SHIFT	0	/* To SB Mail S/W interrupts shift */
#define I_HMB_SW0	(1 << 4)	/* To Host Mail S/W interrupt 0 */
#define I_HMB_SW1	(1 << 5)	/* To Host Mail S/W interrupt 1 */
#define I_HMB_SW2	(1 << 6)	/* To Host Mail S/W interrupt 2 */
#define I_HMB_SW3	(1 << 7)	/* To Host Mail S/W interrupt 3 */
#define I_HMB_SW_MASK	0x000000f0	/* To Host Mail S/W interrupts mask */
#define I_HMB_SW_SHIFT	4	/* To Host Mail S/W interrupts shift */
#define I_WR_OOSYNC	(1 << 8)	/* Write Frame Out Of Sync */
#define I_RD_OOSYNC	(1 << 9)	/* Read Frame Out Of Sync */
#define	I_PC		(1 << 10)	/* descriptor error */
#define	I_PD		(1 << 11)	/* data error */
#define	I_DE		(1 << 12)	/* Descriptor protocol Error */
#define	I_RU		(1 << 13)	/* Receive descriptor Underflow */
#define	I_RO		(1 << 14)	/* Receive fifo Overflow */
#define	I_XU		(1 << 15)	/* Transmit fifo Underflow */
#define	I_RI		(1 << 16)	/* Receive Interrupt */
#define I_BUSPWR	(1 << 17)	/* SDIO Bus Power Change (rev 9) */
#define I_XMTDATA_AVAIL (1 << 23)	/* bits in fifo */
#define	I_XI		(1 << 24)	/* Transmit Interrupt */
#define I_RF_TERM	(1 << 25)	/* Read Frame Terminate */
#define I_WF_TERM	(1 << 26)	/* Write Frame Terminate */
#define I_PCMCIA_XU	(1 << 27)	/* PCMCIA Transmit FIFO Underflow */
#define I_SBINT		(1 << 28)	/* sbintstatus Interrupt */
#define I_CHIPACTIVE	(1 << 29)	/* chip from doze to active state */
#define I_SRESET	(1 << 30)	/* CCCR RES interrupt */
#define I_IOE2		(1U << 31)	/* CCCR IOE2 Bit Changed */
#define	I_ERRORS	(I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
#define I_DMA		(I_RI | I_XI | I_ERRORS)

/* corecontrol */
#define CC_CISRDY		(1 << 0)	/* CIS Ready */
#define CC_BPRESEN		(1 << 1)	/* CCCR RES signal */
#define CC_F2RDY		(1 << 2)	/* set CCCR IOR2 bit */
#define CC_CLRPADSISO		(1 << 3)	/* clear SDIO pads isolation */
#define CC_XMTDATAAVAIL_MODE	(1 << 4)
#define CC_XMTDATAAVAIL_CTRL	(1 << 5)

/* SDA_FRAMECTRL */
#define SFC_RF_TERM	(1 << 0)	/* Read Frame Terminate */
#define SFC_WF_TERM	(1 << 1)	/* Write Frame Terminate */
#define SFC_CRC4WOOS	(1 << 2)	/* CRC error for write out of sync */
#define SFC_ABORTALL	(1 << 3)	/* Abort all in-progress frames */

/* HW frame tag */
#define SDPCM_FRAMETAG_LEN	4	/* 2 bytes len, 2 bytes check val */

/* Total length of frame header for dongle protocol */
#define SDPCM_HDRLEN	(SDPCM_FRAMETAG_LEN + SDPCM_SWHEADER_LEN)
#define SDPCM_RESERVE	(SDPCM_HDRLEN + BRCMF_SDALIGN)

/*
 * Software allocation of To SB Mailbox resources
 */

/* tosbmailbox bits corresponding to intstatus bits */
#define SMB_NAK		(1 << 0)	/* Frame NAK */
#define SMB_INT_ACK	(1 << 1)	/* Host Interrupt ACK */
#define SMB_USE_OOB	(1 << 2)	/* Use OOB Wakeup */
#define SMB_DEV_INT	(1 << 3)	/* Miscellaneous Interrupt */

/* tosbmailboxdata */
#define SMB_DATA_VERSION_SHIFT	16	/* host protocol version */

/*
 * Software allocation of To Host Mailbox resources
 */

/* intstatus bits */
#define I_HMB_FC_STATE	I_HMB_SW0	/* Flow Control State */
#define I_HMB_FC_CHANGE	I_HMB_SW1	/* Flow Control State Changed */
#define I_HMB_FRAME_IND	I_HMB_SW2	/* Frame Indication */
#define I_HMB_HOST_INT	I_HMB_SW3	/* Miscellaneous Interrupt */

/* tohostmailboxdata */
#define HMB_DATA_NAKHANDLED	1	/* retransmit NAK'd frame */
#define HMB_DATA_DEVREADY	2	/* talk to host after enable */
#define HMB_DATA_FC		4	/* per prio flowcontrol update flag */
#define HMB_DATA_FWREADY	8	/* fw ready for protocol activity */

#define HMB_DATA_FCDATA_MASK	0xff000000
#define HMB_DATA_FCDATA_SHIFT	24

#define HMB_DATA_VERSION_MASK	0x00ff0000
#define HMB_DATA_VERSION_SHIFT	16

/*
 * Software-defined protocol header
 */

/* Current protocol version */
#define SDPCM_PROT_VERSION	4

/* SW frame header */
#define SDPCM_PACKET_SEQUENCE(p)	(((u8 *)p)[0] & 0xff)

#define SDPCM_CHANNEL_MASK		0x00000f00
#define SDPCM_CHANNEL_SHIFT		8
#define SDPCM_PACKET_CHANNEL(p)		(((u8 *)p)[1] & 0x0f)

#define SDPCM_NEXTLEN_OFFSET		2

/* Data Offset from SOF (HW Tag, SW Tag, Pad) */
#define SDPCM_DOFFSET_OFFSET		3	/* Data Offset */
#define SDPCM_DOFFSET_VALUE(p)		(((u8 *)p)[SDPCM_DOFFSET_OFFSET] & 0xff)
#define SDPCM_DOFFSET_MASK		0xff000000
#define SDPCM_DOFFSET_SHIFT		24
#define SDPCM_FCMASK_OFFSET		4	/* Flow control */
#define SDPCM_FCMASK_VALUE(p)		(((u8 *)p)[SDPCM_FCMASK_OFFSET] & 0xff)
#define SDPCM_WINDOW_OFFSET		5	/* Credit based fc */
#define SDPCM_WINDOW_VALUE(p)		(((u8 *)p)[SDPCM_WINDOW_OFFSET] & 0xff)

#define SDPCM_SWHEADER_LEN	8	/* SW header is 64 bits */

/* logical channel numbers */
#define SDPCM_CONTROL_CHANNEL	0	/* Control channel Id */
#define SDPCM_EVENT_CHANNEL	1	/* Asyc Event Indication Channel Id */
#define SDPCM_DATA_CHANNEL	2	/* Data Xmit/Recv Channel Id */
#define SDPCM_GLOM_CHANNEL	3	/* For coalesced packets */
#define SDPCM_TEST_CHANNEL	15	/* Reserved for test/debug packets */

#define SDPCM_SEQUENCE_WRAP	256	/* wrap-around val for 8bit frame seq */

#define SDPCM_GLOMDESC(p)	(((u8 *)p)[1] & 0x80)

/*
 * Shared structure between dongle and the host.
 * The structure contains pointers to trap or assert information.
 */
#define SDPCM_SHARED_VERSION       0x0003
#define SDPCM_SHARED_VERSION_MASK  0x00FF
#define SDPCM_SHARED_ASSERT_BUILT  0x0100
#define SDPCM_SHARED_ASSERT        0x0200
#define SDPCM_SHARED_TRAP          0x0400

/* Space for header read, limit for data packets */
#define MAX_HDR_READ	(1 << 6)
#define MAX_RX_DATASZ	2048

/* Maximum milliseconds to wait for F2 to come up */
#define BRCMF_WAIT_F2RDY	3000

/* Bump up limit on waiting for HT to account for first startup;
 * if the image is doing a CRC calculation before programming the PMU
 * for HT availability, it could take a couple hundred ms more, so
 * max out at a 1 second (1000000us).
 */
#undef PMU_MAX_TRANSITION_DLY
#define PMU_MAX_TRANSITION_DLY 1000000

/* Value for ChipClockCSR during initial setup */
#define BRCMF_INIT_CLKCTL1	(SBSDIO_FORCE_HW_CLKREQ_OFF |	\
					SBSDIO_ALP_AVAIL_REQ)

/* Flags for SDH calls */
#define F2SYNC	(SDIO_REQ_4BYTE | SDIO_REQ_FIXED)

#define BRCMF_SDIO_FW_NAME	"brcm/brcmfmac-sdio.bin"
#define BRCMF_SDIO_NV_NAME	"brcm/brcmfmac-sdio.txt"
MODULE_FIRMWARE(BRCMF_SDIO_FW_NAME);
MODULE_FIRMWARE(BRCMF_SDIO_NV_NAME);

#define BRCMF_IDLE_IMMEDIATE	(-1)	/* Enter idle immediately */
#define BRCMF_IDLE_ACTIVE	0	/* Do not request any SD clock change
					 * when idle
					 */
#define BRCMF_IDLE_INTERVAL	1

/*
 * Conversion of 802.1D priority to precedence level
 */
static uint prio2prec(u32 prio)
{
	return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
	       (prio^2) : prio;
}

/* core registers */
struct sdpcmd_regs {
	u32 corecontrol;		/* 0x00, rev8 */
	u32 corestatus;			/* rev8 */
	u32 PAD[1];
	u32 biststatus;			/* rev8 */

	/* PCMCIA access */
	u16 pcmciamesportaladdr;	/* 0x010, rev8 */
	u16 PAD[1];
	u16 pcmciamesportalmask;	/* rev8 */
	u16 PAD[1];
	u16 pcmciawrframebc;		/* rev8 */
	u16 PAD[1];
	u16 pcmciaunderflowtimer;	/* rev8 */
	u16 PAD[1];

	/* interrupt */
	u32 intstatus;			/* 0x020, rev8 */
	u32 hostintmask;		/* rev8 */
	u32 intmask;			/* rev8 */
	u32 sbintstatus;		/* rev8 */
	u32 sbintmask;			/* rev8 */
	u32 funcintmask;		/* rev4 */
	u32 PAD[2];
	u32 tosbmailbox;		/* 0x040, rev8 */
	u32 tohostmailbox;		/* rev8 */
	u32 tosbmailboxdata;		/* rev8 */
	u32 tohostmailboxdata;		/* rev8 */

	/* synchronized access to registers in SDIO clock domain */
	u32 sdioaccess;			/* 0x050, rev8 */
	u32 PAD[3];

	/* PCMCIA frame control */
	u8 pcmciaframectrl;		/* 0x060, rev8 */
	u8 PAD[3];
	u8 pcmciawatermark;		/* rev8 */
	u8 PAD[155];

	/* interrupt batching control */
	u32 intrcvlazy;			/* 0x100, rev8 */
	u32 PAD[3];

	/* counters */
	u32 cmd52rd;			/* 0x110, rev8 */
	u32 cmd52wr;			/* rev8 */
	u32 cmd53rd;			/* rev8 */
	u32 cmd53wr;			/* rev8 */
	u32 abort;			/* rev8 */
	u32 datacrcerror;		/* rev8 */
	u32 rdoutofsync;		/* rev8 */
	u32 wroutofsync;		/* rev8 */
	u32 writebusy;			/* rev8 */
	u32 readwait;			/* rev8 */
	u32 readterm;			/* rev8 */
	u32 writeterm;			/* rev8 */
	u32 PAD[40];
	u32 clockctlstatus;		/* rev8 */
	u32 PAD[7];

	u32 PAD[128];			/* DMA engines */

	/* SDIO/PCMCIA CIS region */
	char cis[512];			/* 0x400-0x5ff, rev6 */

	/* PCMCIA function control registers */
	char pcmciafcr[256];		/* 0x600-6ff, rev6 */
	u16 PAD[55];

	/* PCMCIA backplane access */
	u16 backplanecsr;		/* 0x76E, rev6 */
	u16 backplaneaddr0;		/* rev6 */
	u16 backplaneaddr1;		/* rev6 */
	u16 backplaneaddr2;		/* rev6 */
	u16 backplaneaddr3;		/* rev6 */
	u16 backplanedata0;		/* rev6 */
	u16 backplanedata1;		/* rev6 */
	u16 backplanedata2;		/* rev6 */
	u16 backplanedata3;		/* rev6 */
	u16 PAD[31];

	/* sprom "size" & "blank" info */
	u16 spromstatus;		/* 0x7BE, rev2 */
	u32 PAD[464];

	u16 PAD[0x80];
};

#ifdef DEBUG
/* Device console log buffer state */
struct brcmf_console {
	uint count;		/* Poll interval msec counter */
	uint log_addr;		/* Log struct address (fixed) */
	struct rte_log_le log_le;	/* Log struct (host copy) */
	uint bufsize;		/* Size of log buffer */
	u8 *buf;		/* Log buffer (host copy) */
	uint last;		/* Last buffer read index */
};

struct brcmf_trap_info {
	__le32		type;
	__le32		epc;
	__le32		cpsr;
	__le32		spsr;
	__le32		r0;	/* a1 */
	__le32		r1;	/* a2 */
	__le32		r2;	/* a3 */
	__le32		r3;	/* a4 */
	__le32		r4;	/* v1 */
	__le32		r5;	/* v2 */
	__le32		r6;	/* v3 */
	__le32		r7;	/* v4 */
	__le32		r8;	/* v5 */
	__le32		r9;	/* sb/v6 */
	__le32		r10;	/* sl/v7 */
	__le32		r11;	/* fp/v8 */
	__le32		r12;	/* ip */
	__le32		r13;	/* sp */
	__le32		r14;	/* lr */
	__le32		pc;	/* r15 */
};
#endif				/* DEBUG */

struct sdpcm_shared {
	u32 flags;
	u32 trap_addr;
	u32 assert_exp_addr;
	u32 assert_file_addr;
	u32 assert_line;
	u32 console_addr;	/* Address of struct rte_console */
	u32 msgtrace_addr;
	u8 tag[32];
	u32 brpt_addr;
};

struct sdpcm_shared_le {
	__le32 flags;
	__le32 trap_addr;
	__le32 assert_exp_addr;
	__le32 assert_file_addr;
	__le32 assert_line;
	__le32 console_addr;	/* Address of struct rte_console */
	__le32 msgtrace_addr;
	u8 tag[32];
	__le32 brpt_addr;
};

/* SDIO read frame info */
struct brcmf_sdio_read {
	u8 seq_num;
	u8 channel;
	u16 len;
	u16 len_left;
	u16 len_nxtfrm;
	u8 dat_offset;
};

/* misc chip info needed by some of the routines */
/* Private data for SDIO bus interaction */
struct brcmf_sdio {
	struct brcmf_sdio_dev *sdiodev;	/* sdio device handler */
	struct chip_info *ci;	/* Chip info struct */
	char *vars;		/* Variables (from CIS and/or other) */
	uint varsz;		/* Size of variables buffer */

	u32 ramsize;		/* Size of RAM in SOCRAM (bytes) */

	u32 hostintmask;	/* Copy of Host Interrupt Mask */
	atomic_t intstatus;	/* Intstatus bits (events) pending */
	atomic_t fcstate;	/* State of dongle flow-control */

	uint blocksize;		/* Block size of SDIO transfers */
	uint roundup;		/* Max roundup limit */

	struct pktq txq;	/* Queue length used for flow-control */
	u8 flowcontrol;	/* per prio flow control bitmask */
	u8 tx_seq;		/* Transmit sequence number (next) */
	u8 tx_max;		/* Maximum transmit sequence allowed */

	u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN];
	u8 *rxhdr;		/* Header of current rx frame (in hdrbuf) */
	u8 rx_seq;		/* Receive sequence number (expected) */
	struct brcmf_sdio_read cur_read;
				/* info of current read frame */
	bool rxskip;		/* Skip receive (awaiting NAK ACK) */
	bool rxpending;		/* Data frame pending in dongle */

	uint rxbound;		/* Rx frames to read before resched */
	uint txbound;		/* Tx frames to send before resched */
	uint txminmax;

	struct sk_buff *glomd;	/* Packet containing glomming descriptor */
	struct sk_buff_head glom; /* Packet list for glommed superframe */
	uint glomerr;		/* Glom packet read errors */

	u8 *rxbuf;		/* Buffer for receiving control packets */
	uint rxblen;		/* Allocated length of rxbuf */
	u8 *rxctl;		/* Aligned pointer into rxbuf */
	u8 *rxctl_orig;		/* pointer for freeing rxctl */
	u8 *databuf;		/* Buffer for receiving big glom packet */
	u8 *dataptr;		/* Aligned pointer into databuf */
	uint rxlen;		/* Length of valid data in buffer */
	spinlock_t rxctl_lock;	/* protection lock for ctrl frame resources */

	u8 sdpcm_ver;	/* Bus protocol reported by dongle */

	bool intr;		/* Use interrupts */
	bool poll;		/* Use polling */
	atomic_t ipend;		/* Device interrupt is pending */
	uint spurious;		/* Count of spurious interrupts */
	uint pollrate;		/* Ticks between device polls */
	uint polltick;		/* Tick counter */

#ifdef DEBUG
	uint console_interval;
	struct brcmf_console console;	/* Console output polling support */
	uint console_addr;	/* Console address from shared struct */
#endif				/* DEBUG */

	uint clkstate;		/* State of sd and backplane clock(s) */
	bool activity;		/* Activity flag for clock down */
	s32 idletime;		/* Control for activity timeout */
	s32 idlecount;	/* Activity timeout counter */
	s32 idleclock;	/* How to set bus driver when idle */
	s32 sd_rxchain;
	bool use_rxchain;	/* If brcmf should use PKT chains */
	bool rxflow_mode;	/* Rx flow control mode */
	bool rxflow;		/* Is rx flow control on */
	bool alp_only;		/* Don't use HT clock (ALP only) */

	u8 *ctrl_frame_buf;
	u32 ctrl_frame_len;
	bool ctrl_frame_stat;

	spinlock_t txqlock;
	wait_queue_head_t ctrl_wait;
	wait_queue_head_t dcmd_resp_wait;

	struct timer_list timer;
	struct completion watchdog_wait;
	struct task_struct *watchdog_tsk;
	bool wd_timer_valid;
	uint save_ms;

	struct workqueue_struct *brcmf_wq;
	struct work_struct datawork;
	struct list_head dpc_tsklst;
	spinlock_t dpc_tl_lock;

	const struct firmware *firmware;
	u32 fw_ptr;

	bool txoff;		/* Transmit flow-controlled */
	struct brcmf_sdio_count sdcnt;
};

/* clkstate */
#define CLK_NONE	0
#define CLK_SDONLY	1
#define CLK_PENDING	2	/* Not used yet */
#define CLK_AVAIL	3

#ifdef DEBUG
static int qcount[NUMPRIO];
static int tx_packets[NUMPRIO];
#endif				/* DEBUG */

#define SDIO_DRIVE_STRENGTH	6	/* in milliamps */

#define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)

/* Retry count for register access failures */
static const uint retry_limit = 2;

/* Limit on rounding up frames */
static const uint max_roundup = 512;

#define ALIGNMENT  4

enum brcmf_sdio_frmtype {
	BRCMF_SDIO_FT_NORMAL,
	BRCMF_SDIO_FT_SUPER,
	BRCMF_SDIO_FT_SUB,
};

static void pkt_align(struct sk_buff *p, int len, int align)
{
	uint datalign;
	datalign = (unsigned long)(p->data);
	datalign = roundup(datalign, (align)) - datalign;
	if (datalign)
		skb_pull(p, datalign);
	__skb_trim(p, len);
}

/* To check if there's window offered */
static bool data_ok(struct brcmf_sdio *bus)
{
	return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
	       ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
}

/*
 * Reads a register in the SDIO hardware block. This block occupies a series of
 * adresses on the 32 bit backplane bus.
 */
static int
r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset)
{
	u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
	int ret;

	*regvar = brcmf_sdio_regrl(bus->sdiodev,
				   bus->ci->c_inf[idx].base + offset, &ret);

	return ret;
}

static int
w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
{
	u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
	int ret;

	brcmf_sdio_regwl(bus->sdiodev,
			 bus->ci->c_inf[idx].base + reg_offset,
			 regval, &ret);

	return ret;
}

#define PKT_AVAILABLE()		(intstatus & I_HMB_FRAME_IND)

#define HOSTINTMASK		(I_HMB_SW_MASK | I_CHIPACTIVE)

/* Turn backplane clock on or off */
static int brcmf_sdbrcm_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
{
	int err;
	u8 clkctl, clkreq, devctl;
	unsigned long timeout;

	brcmf_dbg(TRACE, "Enter\n");

	clkctl = 0;

	if (on) {
		/* Request HT Avail */
		clkreq =
		    bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;

		brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
				 clkreq, &err);
		if (err) {
			brcmf_err("HT Avail request error: %d\n", err);
			return -EBADE;
		}

		/* Check current status */
		clkctl = brcmf_sdio_regrb(bus->sdiodev,
					  SBSDIO_FUNC1_CHIPCLKCSR, &err);
		if (err) {
			brcmf_err("HT Avail read error: %d\n", err);
			return -EBADE;
		}

		/* Go to pending and await interrupt if appropriate */
		if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
			/* Allow only clock-available interrupt */
			devctl = brcmf_sdio_regrb(bus->sdiodev,
						  SBSDIO_DEVICE_CTL, &err);
			if (err) {
				brcmf_err("Devctl error setting CA: %d\n",
					  err);
				return -EBADE;
			}

			devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
			brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
					 devctl, &err);
			brcmf_dbg(INFO, "CLKCTL: set PENDING\n");
			bus->clkstate = CLK_PENDING;

			return 0;
		} else if (bus->clkstate == CLK_PENDING) {
			/* Cancel CA-only interrupt filter */
			devctl = brcmf_sdio_regrb(bus->sdiodev,
						  SBSDIO_DEVICE_CTL, &err);
			devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
			brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
					 devctl, &err);
		}

		/* Otherwise, wait here (polling) for HT Avail */
		timeout = jiffies +
			  msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
		while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
			clkctl = brcmf_sdio_regrb(bus->sdiodev,
						  SBSDIO_FUNC1_CHIPCLKCSR,
						  &err);
			if (time_after(jiffies, timeout))
				break;
			else
				usleep_range(5000, 10000);
		}
		if (err) {
			brcmf_err("HT Avail request error: %d\n", err);
			return -EBADE;
		}
		if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
			brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n",
				  PMU_MAX_TRANSITION_DLY, clkctl);
			return -EBADE;
		}

		/* Mark clock available */
		bus->clkstate = CLK_AVAIL;
		brcmf_dbg(INFO, "CLKCTL: turned ON\n");

#if defined(DEBUG)
		if (!bus->alp_only) {
			if (SBSDIO_ALPONLY(clkctl))
				brcmf_err("HT Clock should be on\n");
		}
#endif				/* defined (DEBUG) */

		bus->activity = true;
	} else {
		clkreq = 0;

		if (bus->clkstate == CLK_PENDING) {
			/* Cancel CA-only interrupt filter */
			devctl = brcmf_sdio_regrb(bus->sdiodev,
						  SBSDIO_DEVICE_CTL, &err);
			devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
			brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
					 devctl, &err);
		}

		bus->clkstate = CLK_SDONLY;
		brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
				 clkreq, &err);
		brcmf_dbg(INFO, "CLKCTL: turned OFF\n");
		if (err) {
			brcmf_err("Failed access turning clock off: %d\n",
				  err);
			return -EBADE;
		}
	}
	return 0;
}

/* Change idle/active SD state */
static int brcmf_sdbrcm_sdclk(struct brcmf_sdio *bus, bool on)
{
	brcmf_dbg(TRACE, "Enter\n");

	if (on)
		bus->clkstate = CLK_SDONLY;
	else
		bus->clkstate = CLK_NONE;

	return 0;
}

/* Transition SD and backplane clock readiness */
static int brcmf_sdbrcm_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
{
#ifdef DEBUG
	uint oldstate = bus->clkstate;
#endif				/* DEBUG */

	brcmf_dbg(TRACE, "Enter\n");

	/* Early exit if we're already there */
	if (bus->clkstate == target) {
		if (target == CLK_AVAIL) {
			brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
			bus->activity = true;
		}
		return 0;
	}

	switch (target) {
	case CLK_AVAIL:
		/* Make sure SD clock is available */
		if (bus->clkstate == CLK_NONE)
			brcmf_sdbrcm_sdclk(bus, true);
		/* Now request HT Avail on the backplane */
		brcmf_sdbrcm_htclk(bus, true, pendok);
		brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
		bus->activity = true;
		break;

	case CLK_SDONLY:
		/* Remove HT request, or bring up SD clock */
		if (bus->clkstate == CLK_NONE)
			brcmf_sdbrcm_sdclk(bus, true);
		else if (bus->clkstate == CLK_AVAIL)
			brcmf_sdbrcm_htclk(bus, false, false);
		else
			brcmf_err("request for %d -> %d\n",
				  bus->clkstate, target);
		brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
		break;

	case CLK_NONE:
		/* Make sure to remove HT request */
		if (bus->clkstate == CLK_AVAIL)
			brcmf_sdbrcm_htclk(bus, false, false);
		/* Now remove the SD clock */
		brcmf_sdbrcm_sdclk(bus, false);
		brcmf_sdbrcm_wd_timer(bus, 0);
		break;
	}
#ifdef DEBUG
	brcmf_dbg(INFO, "%d -> %d\n", oldstate, bus->clkstate);
#endif				/* DEBUG */

	return 0;
}

static u32 brcmf_sdbrcm_hostmail(struct brcmf_sdio *bus)
{
	u32 intstatus = 0;
	u32 hmb_data;
	u8 fcbits;
	int ret;

	brcmf_dbg(TRACE, "Enter\n");

	/* Read mailbox data and ack that we did so */
	ret = r_sdreg32(bus, &hmb_data,
			offsetof(struct sdpcmd_regs, tohostmailboxdata));

	if (ret == 0)
		w_sdreg32(bus, SMB_INT_ACK,
			  offsetof(struct sdpcmd_regs, tosbmailbox));
	bus->sdcnt.f1regdata += 2;

	/* Dongle recomposed rx frames, accept them again */
	if (hmb_data & HMB_DATA_NAKHANDLED) {
		brcmf_dbg(INFO, "Dongle reports NAK handled, expect rtx of %d\n",
			  bus->rx_seq);
		if (!bus->rxskip)
			brcmf_err("unexpected NAKHANDLED!\n");

		bus->rxskip = false;
		intstatus |= I_HMB_FRAME_IND;
	}

	/*
	 * DEVREADY does not occur with gSPI.
	 */
	if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
		bus->sdpcm_ver =
		    (hmb_data & HMB_DATA_VERSION_MASK) >>
		    HMB_DATA_VERSION_SHIFT;
		if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
			brcmf_err("Version mismatch, dongle reports %d, "
				  "expecting %d\n",
				  bus->sdpcm_ver, SDPCM_PROT_VERSION);
		else
			brcmf_dbg(INFO, "Dongle ready, protocol version %d\n",
				  bus->sdpcm_ver);
	}

	/*
	 * Flow Control has been moved into the RX headers and this out of band
	 * method isn't used any more.
	 * remaining backward compatible with older dongles.
	 */
	if (hmb_data & HMB_DATA_FC) {
		fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
							HMB_DATA_FCDATA_SHIFT;

		if (fcbits & ~bus->flowcontrol)
			bus->sdcnt.fc_xoff++;

		if (bus->flowcontrol & ~fcbits)
			bus->sdcnt.fc_xon++;

		bus->sdcnt.fc_rcvd++;
		bus->flowcontrol = fcbits;
	}

	/* Shouldn't be any others */
	if (hmb_data & ~(HMB_DATA_DEVREADY |
			 HMB_DATA_NAKHANDLED |
			 HMB_DATA_FC |
			 HMB_DATA_FWREADY |
			 HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
		brcmf_err("Unknown mailbox data content: 0x%02x\n",
			  hmb_data);

	return intstatus;
}

static void brcmf_sdbrcm_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
{
	uint retries = 0;
	u16 lastrbc;
	u8 hi, lo;
	int err;

	brcmf_err("%sterminate frame%s\n",
		  abort ? "abort command, " : "",
		  rtx ? ", send NAK" : "");

	if (abort)
		brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);

	brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
			 SFC_RF_TERM, &err);
	bus->sdcnt.f1regdata++;

	/* Wait until the packet has been flushed (device/FIFO stable) */
	for (lastrbc = retries = 0xffff; retries > 0; retries--) {
		hi = brcmf_sdio_regrb(bus->sdiodev,
				      SBSDIO_FUNC1_RFRAMEBCHI, &err);
		lo = brcmf_sdio_regrb(bus->sdiodev,
				      SBSDIO_FUNC1_RFRAMEBCLO, &err);
		bus->sdcnt.f1regdata += 2;

		if ((hi == 0) && (lo == 0))
			break;

		if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
			brcmf_err("count growing: last 0x%04x now 0x%04x\n",
				  lastrbc, (hi << 8) + lo);
		}
		lastrbc = (hi << 8) + lo;
	}

	if (!retries)
		brcmf_err("count never zeroed: last 0x%04x\n", lastrbc);
	else
		brcmf_dbg(INFO, "flush took %d iterations\n", 0xffff - retries);

	if (rtx) {
		bus->sdcnt.rxrtx++;
		err = w_sdreg32(bus, SMB_NAK,
				offsetof(struct sdpcmd_regs, tosbmailbox));

		bus->sdcnt.f1regdata++;
		if (err == 0)
			bus->rxskip = true;
	}

	/* Clear partial in any case */
	bus->cur_read.len = 0;

	/* If we can't reach the device, signal failure */
	if (err)
		bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
}

/* copy a buffer into a pkt buffer chain */
static uint brcmf_sdbrcm_glom_from_buf(struct brcmf_sdio *bus, uint len)
{
	uint n, ret = 0;
	struct sk_buff *p;
	u8 *buf;

	buf = bus->dataptr;

	/* copy the data */
	skb_queue_walk(&bus->glom, p) {
		n = min_t(uint, p->len, len);
		memcpy(p->data, buf, n);
		buf += n;
		len -= n;
		ret += n;
		if (!len)
			break;
	}

	return ret;
}

/* return total length of buffer chain */
static uint brcmf_sdbrcm_glom_len(struct brcmf_sdio *bus)
{
	struct sk_buff *p;
	uint total;

	total = 0;
	skb_queue_walk(&bus->glom, p)
		total += p->len;
	return total;
}

static void brcmf_sdbrcm_free_glom(struct brcmf_sdio *bus)
{
	struct sk_buff *cur, *next;

	skb_queue_walk_safe(&bus->glom, cur, next) {
		skb_unlink(cur, &bus->glom);
		brcmu_pkt_buf_free_skb(cur);
	}
}

static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
			       struct brcmf_sdio_read *rd,
			       enum brcmf_sdio_frmtype type)
{
	u16 len, checksum;
	u8 rx_seq, fc, tx_seq_max;

	/*
	 * 4 bytes hardware header (frame tag)
	 * Byte 0~1: Frame length
	 * Byte 2~3: Checksum, bit-wise inverse of frame length
	 */
	len = get_unaligned_le16(header);
	checksum = get_unaligned_le16(header + sizeof(u16));
	/* All zero means no more to read */
	if (!(len | checksum)) {
		bus->rxpending = false;
		return -ENODATA;
	}
	if ((u16)(~(len ^ checksum))) {
		brcmf_err("HW header checksum error\n");
		bus->sdcnt.rx_badhdr++;
		brcmf_sdbrcm_rxfail(bus, false, false);
		return -EIO;
	}
	if (len < SDPCM_HDRLEN) {
		brcmf_err("HW header length error\n");
		return -EPROTO;
	}
	if (type == BRCMF_SDIO_FT_SUPER &&
	    (roundup(len, bus->blocksize) != rd->len)) {
		brcmf_err("HW superframe header length error\n");
		return -EPROTO;
	}
	if (type == BRCMF_SDIO_FT_SUB && len > rd->len) {
		brcmf_err("HW subframe header length error\n");
		return -EPROTO;
	}
	rd->len = len;

	/*
	 * 8 bytes hardware header
	 * Byte 0: Rx sequence number
	 * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
	 * Byte 2: Length of next data frame
	 * Byte 3: Data offset
	 * Byte 4: Flow control bits
	 * Byte 5: Maximum Sequence number allow for Tx
	 * Byte 6~7: Reserved
	 */
	if (type == BRCMF_SDIO_FT_SUPER &&
	    SDPCM_GLOMDESC(&header[SDPCM_FRAMETAG_LEN])) {
		brcmf_err("Glom descriptor found in superframe head\n");
		rd->len = 0;
		return -EINVAL;
	}
	rx_seq = SDPCM_PACKET_SEQUENCE(&header[SDPCM_FRAMETAG_LEN]);
	rd->channel = SDPCM_PACKET_CHANNEL(&header[SDPCM_FRAMETAG_LEN]);
	if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
	    type != BRCMF_SDIO_FT_SUPER) {
		brcmf_err("HW header length too long\n");
		bus->sdcnt.rx_toolong++;
		brcmf_sdbrcm_rxfail(bus, false, false);
		rd->len = 0;
		return -EPROTO;
	}
	if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) {
		brcmf_err("Wrong channel for superframe\n");
		rd->len = 0;
		return -EINVAL;
	}
	if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL &&
	    rd->channel != SDPCM_EVENT_CHANNEL) {
		brcmf_err("Wrong channel for subframe\n");
		rd->len = 0;
		return -EINVAL;
	}
	rd->dat_offset = SDPCM_DOFFSET_VALUE(&header[SDPCM_FRAMETAG_LEN]);
	if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
		brcmf_err("seq %d: bad data offset\n", rx_seq);
		bus->sdcnt.rx_badhdr++;
		brcmf_sdbrcm_rxfail(bus, false, false);
		rd->len = 0;
		return -ENXIO;
	}
	if (rd->seq_num != rx_seq) {
		brcmf_err("seq %d: sequence number error, expect %d\n",
			  rx_seq, rd->seq_num);
		bus->sdcnt.rx_badseq++;
		rd->seq_num = rx_seq;
	}
	/* no need to check the reset for subframe */
	if (type == BRCMF_SDIO_FT_SUB)
		return 0;
	rd->len_nxtfrm = header[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
	if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
		/* only warm for NON glom packet */
		if (rd->channel != SDPCM_GLOM_CHANNEL)
			brcmf_err("seq %d: next length error\n", rx_seq);
		rd->len_nxtfrm = 0;
	}
	fc = SDPCM_FCMASK_VALUE(&header[SDPCM_FRAMETAG_LEN]);
	if (bus->flowcontrol != fc) {
		if (~bus->flowcontrol & fc)
			bus->sdcnt.fc_xoff++;
		if (bus->flowcontrol & ~fc)
			bus->sdcnt.fc_xon++;
		bus->sdcnt.fc_rcvd++;
		bus->flowcontrol = fc;
	}
	tx_seq_max = SDPCM_WINDOW_VALUE(&header[SDPCM_FRAMETAG_LEN]);
	if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
		brcmf_err("seq %d: max tx seq number error\n", rx_seq);
		tx_seq_max = bus->tx_seq + 2;
	}
	bus->tx_max = tx_seq_max;

	return 0;
}

static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
{
	u16 dlen, totlen;
	u8 *dptr, num = 0;

	u16 sublen;
	struct sk_buff *pfirst, *pnext;

	int errcode;
	u8 doff, sfdoff;

	bool usechain = bus->use_rxchain;

	struct brcmf_sdio_read rd_new;

	/* If packets, issue read(s) and send up packet chain */
	/* Return sequence numbers consumed? */

	brcmf_dbg(TRACE, "start: glomd %p glom %p\n",
		  bus->glomd, skb_peek(&bus->glom));

	/* If there's a descriptor, generate the packet chain */
	if (bus->glomd) {
		pfirst = pnext = NULL;
		dlen = (u16) (bus->glomd->len);
		dptr = bus->glomd->data;
		if (!dlen || (dlen & 1)) {
			brcmf_err("bad glomd len(%d), ignore descriptor\n",
				  dlen);
			dlen = 0;
		}

		for (totlen = num = 0; dlen; num++) {
			/* Get (and move past) next length */
			sublen = get_unaligned_le16(dptr);
			dlen -= sizeof(u16);
			dptr += sizeof(u16);
			if ((sublen < SDPCM_HDRLEN) ||
			    ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
				brcmf_err("descriptor len %d bad: %d\n",
					  num, sublen);
				pnext = NULL;
				break;
			}
			if (sublen % BRCMF_SDALIGN) {
				brcmf_err("sublen %d not multiple of %d\n",
					  sublen, BRCMF_SDALIGN);
				usechain = false;
			}
			totlen += sublen;

			/* For last frame, adjust read len so total
				 is a block multiple */
			if (!dlen) {
				sublen +=
				    (roundup(totlen, bus->blocksize) - totlen);
				totlen = roundup(totlen, bus->blocksize);
			}

			/* Allocate/chain packet for next subframe */
			pnext = brcmu_pkt_buf_get_skb(sublen + BRCMF_SDALIGN);
			if (pnext == NULL) {
				brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
					  num, sublen);
				break;
			}
			skb_queue_tail(&bus->glom, pnext);

			/* Adhere to start alignment requirements */
			pkt_align(pnext, sublen, BRCMF_SDALIGN);
		}

		/* If all allocations succeeded, save packet chain
			 in bus structure */
		if (pnext) {
			brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
				  totlen, num);
			if (BRCMF_GLOM_ON() && bus->cur_read.len &&
			    totlen != bus->cur_read.len) {
				brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
					  bus->cur_read.len, totlen, rxseq);
			}
			pfirst = pnext = NULL;
		} else {
			brcmf_sdbrcm_free_glom(bus);
			num = 0;
		}

		/* Done with descriptor packet */
		brcmu_pkt_buf_free_skb(bus->glomd);
		bus->glomd = NULL;
		bus->cur_read.len = 0;
	}

	/* Ok -- either we just generated a packet chain,
		 or had one from before */
	if (!skb_queue_empty(&bus->glom)) {
		if (BRCMF_GLOM_ON()) {
			brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
			skb_queue_walk(&bus->glom, pnext) {
				brcmf_dbg(GLOM, "    %p: %p len 0x%04x (%d)\n",
					  pnext, (u8 *) (pnext->data),
					  pnext->len, pnext->len);
			}
		}

		pfirst = skb_peek(&bus->glom);
		dlen = (u16) brcmf_sdbrcm_glom_len(bus);

		/* Do an SDIO read for the superframe.  Configurable iovar to
		 * read directly into the chained packet, or allocate a large
		 * packet and and copy into the chain.
		 */
		sdio_claim_host(bus->sdiodev->func[1]);
		if (usechain) {
			errcode = brcmf_sdcard_recv_chain(bus->sdiodev,
					bus->sdiodev->sbwad,
					SDIO_FUNC_2, F2SYNC, &bus->glom);
		} else if (bus->dataptr) {
			errcode = brcmf_sdcard_recv_buf(bus->sdiodev,
					bus->sdiodev->sbwad,
					SDIO_FUNC_2, F2SYNC,
					bus->dataptr, dlen);
			sublen = (u16) brcmf_sdbrcm_glom_from_buf(bus, dlen);
			if (sublen != dlen) {
				brcmf_err("FAILED TO COPY, dlen %d sublen %d\n",
					  dlen, sublen);
				errcode = -1;
			}
			pnext = NULL;
		} else {
			brcmf_err("COULDN'T ALLOC %d-BYTE GLOM, FORCE FAILURE\n",
				  dlen);
			errcode = -1;
		}
		sdio_release_host(bus->sdiodev->func[1]);
		bus->sdcnt.f2rxdata++;

		/* On failure, kill the superframe, allow a couple retries */
		if (errcode < 0) {
			brcmf_err("glom read of %d bytes failed: %d\n",
				  dlen, errcode);

			sdio_claim_host(bus->sdiodev->func[1]);
			if (bus->glomerr++ < 3) {
				brcmf_sdbrcm_rxfail(bus, true, true);
			} else {
				bus->glomerr = 0;
				brcmf_sdbrcm_rxfail(bus, true, false);
				bus->sdcnt.rxglomfail++;
				brcmf_sdbrcm_free_glom(bus);
			}
			sdio_release_host(bus->sdiodev->func[1]);
			return 0;
		}

		brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
				   pfirst->data, min_t(int, pfirst->len, 48),
				   "SUPERFRAME:\n");

		rd_new.seq_num = rxseq;
		rd_new.len = dlen;
		sdio_claim_host(bus->sdiodev->func[1]);
		errcode = brcmf_sdio_hdparser(bus, pfirst->data, &rd_new,
					      BRCMF_SDIO_FT_SUPER);
		sdio_release_host(bus->sdiodev->func[1]);
		bus->cur_read.len = rd_new.len_nxtfrm << 4;

		/* Remove superframe header, remember offset */
		skb_pull(pfirst, rd_new.dat_offset);
		sfdoff = rd_new.dat_offset;
		num = 0;

		/* Validate all the subframe headers */
		skb_queue_walk(&bus->glom, pnext) {
			/* leave when invalid subframe is found */
			if (errcode)
				break;

			rd_new.len = pnext->len;
			rd_new.seq_num = rxseq++;
			sdio_claim_host(bus->sdiodev->func[1]);
			errcode = brcmf_sdio_hdparser(bus, pnext->data, &rd_new,
						      BRCMF_SDIO_FT_SUB);
			sdio_release_host(bus->sdiodev->func[1]);
			brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
					   pnext->data, 32, "subframe:\n");

			num++;
		}

		if (errcode) {
			/* Terminate frame on error, request
				 a couple retries */
			sdio_claim_host(bus->sdiodev->func[1]);
			if (bus->glomerr++ < 3) {
				/* Restore superframe header space */
				skb_push(pfirst, sfdoff);
				brcmf_sdbrcm_rxfail(bus, true, true);
			} else {
				bus->glomerr = 0;
				brcmf_sdbrcm_rxfail(bus, true, false);
				bus->sdcnt.rxglomfail++;
				brcmf_sdbrcm_free_glom(bus);
			}
			sdio_release_host(bus->sdiodev->func[1]);
			bus->cur_read.len = 0;
			return 0;
		}

		/* Basic SD framing looks ok - process each packet (header) */

		skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
			dptr = (u8 *) (pfirst->data);
			sublen = get_unaligned_le16(dptr);
			doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);

			brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
					   dptr, pfirst->len,
					   "Rx Subframe Data:\n");

			__skb_trim(pfirst, sublen);
			skb_pull(pfirst, doff);

			if (pfirst->len == 0) {
				skb_unlink(pfirst, &bus->glom);
				brcmu_pkt_buf_free_skb(pfirst);
				continue;
			}

			brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
					   pfirst->data,
					   min_t(int, pfirst->len, 32),
					   "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
					   bus->glom.qlen, pfirst, pfirst->data,
					   pfirst->len, pfirst->next,
					   pfirst->prev);
		}
		/* sent any remaining packets up */
		if (bus->glom.qlen)
			brcmf_rx_frames(bus->sdiodev->dev, &bus->glom);

		bus->sdcnt.rxglomframes++;
		bus->sdcnt.rxglompkts += bus->glom.qlen;
	}
	return num;
}

static int brcmf_sdbrcm_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
					bool *pending)
{
	DECLARE_WAITQUEUE(wait, current);
	int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT);

	/* Wait until control frame is available */
	add_wait_queue(&bus->dcmd_resp_wait, &wait);
	set_current_state(TASK_INTERRUPTIBLE);

	while (!(*condition) && (!signal_pending(current) && timeout))
		timeout = schedule_timeout(timeout);

	if (signal_pending(current))
		*pending = true;

	set_current_state(TASK_RUNNING);
	remove_wait_queue(&bus->dcmd_resp_wait, &wait);

	return timeout;
}

static int brcmf_sdbrcm_dcmd_resp_wake(struct brcmf_sdio *bus)
{
	if (waitqueue_active(&bus->dcmd_resp_wait))
		wake_up_interruptible(&bus->dcmd_resp_wait);

	return 0;
}
static void
brcmf_sdbrcm_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
{
	uint rdlen, pad;
	u8 *buf = NULL, *rbuf;
	int sdret;

	brcmf_dbg(TRACE, "Enter\n");

	if (bus->rxblen)
		buf = vzalloc(bus->rxblen);
	if (!buf)
		goto done;

	rbuf = bus->rxbuf;
	pad = ((unsigned long)rbuf % BRCMF_SDALIGN);
	if (pad)
		rbuf += (BRCMF_SDALIGN - pad);

	/* Copy the already-read portion over */
	memcpy(buf, hdr, BRCMF_FIRSTREAD);
	if (len <= BRCMF_FIRSTREAD)
		goto gotpkt;

	/* Raise rdlen to next SDIO block to avoid tail command */
	rdlen = len - BRCMF_FIRSTREAD;
	if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
		pad = bus->blocksize - (rdlen % bus->blocksize);
		if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
		    ((len + pad) < bus->sdiodev->bus_if->maxctl))
			rdlen += pad;
	} else if (rdlen % BRCMF_SDALIGN) {
		rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN);
	}

	/* Satisfy length-alignment requirements */
	if (rdlen & (ALIGNMENT - 1))
		rdlen = roundup(rdlen, ALIGNMENT);

	/* Drop if the read is too big or it exceeds our maximum */
	if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
		brcmf_err("%d-byte control read exceeds %d-byte buffer\n",
			  rdlen, bus->sdiodev->bus_if->maxctl);
		brcmf_sdbrcm_rxfail(bus, false, false);
		goto done;
	}

	if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
		brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
			  len, len - doff, bus->sdiodev->bus_if->maxctl);
		bus->sdcnt.rx_toolong++;
		brcmf_sdbrcm_rxfail(bus, false, false);
		goto done;
	}

	/* Read remain of frame body */
	sdret = brcmf_sdcard_recv_buf(bus->sdiodev,
				bus->sdiodev->sbwad,
				SDIO_FUNC_2,
				F2SYNC, rbuf, rdlen);
	bus->sdcnt.f2rxdata++;

	/* Control frame failures need retransmission */
	if (sdret < 0) {
		brcmf_err("read %d control bytes failed: %d\n",
			  rdlen, sdret);
		bus->sdcnt.rxc_errors++;
		brcmf_sdbrcm_rxfail(bus, true, true);
		goto done;
	} else
		memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen);

gotpkt:

	brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
			   buf, len, "RxCtrl:\n");

	/* Point to valid data and indicate its length */
	spin_lock_bh(&bus->rxctl_lock);
	if (bus->rxctl) {
		brcmf_err("last control frame is being processed.\n");
		spin_unlock_bh(&bus->rxctl_lock);
		vfree(buf);
		goto done;
	}
	bus->rxctl = buf + doff;
	bus->rxctl_orig = buf;
	bus->rxlen = len - doff;
	spin_unlock_bh(&bus->rxctl_lock);

done:
	/* Awake any waiters */
	brcmf_sdbrcm_dcmd_resp_wake(bus);
}

/* Pad read to blocksize for efficiency */
static void brcmf_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
{
	if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
		*pad = bus->blocksize - (*rdlen % bus->blocksize);
		if (*pad <= bus->roundup && *pad < bus->blocksize &&
		    *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
			*rdlen += *pad;
	} else if (*rdlen % BRCMF_SDALIGN) {
		*rdlen += BRCMF_SDALIGN - (*rdlen % BRCMF_SDALIGN);
	}
}

static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
{
	struct sk_buff *pkt;		/* Packet for event or data frames */
	struct sk_buff_head pktlist;	/* needed for bus interface */
	u16 pad;		/* Number of pad bytes to read */
	uint rxleft = 0;	/* Remaining number of frames allowed */
	int sdret;		/* Return code from calls */
	uint rxcount = 0;	/* Total frames read */
	struct brcmf_sdio_read *rd = &bus->cur_read, rd_new;
	u8 head_read = 0;

	brcmf_dbg(TRACE, "Enter\n");

	/* Not finished unless we encounter no more frames indication */
	bus->rxpending = true;

	for (rd->seq_num = bus->rx_seq, rxleft = maxframes;
	     !bus->rxskip && rxleft &&
	     bus->sdiodev->bus_if->state != BRCMF_BUS_DOWN;
	     rd->seq_num++, rxleft--) {

		/* Handle glomming separately */
		if (bus->glomd || !skb_queue_empty(&bus->glom)) {
			u8 cnt;
			brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
				  bus->glomd, skb_peek(&bus->glom));
			cnt = brcmf_sdbrcm_rxglom(bus, rd->seq_num);
			brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
			rd->seq_num += cnt - 1;
			rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
			continue;
		}

		rd->len_left = rd->len;
		/* read header first for unknow frame length */
		sdio_claim_host(bus->sdiodev->func[1]);
		if (!rd->len) {
			sdret = brcmf_sdcard_recv_buf(bus->sdiodev,
						      bus->sdiodev->sbwad,
						      SDIO_FUNC_2, F2SYNC,
						      bus->rxhdr,
						      BRCMF_FIRSTREAD);
			bus->sdcnt.f2rxhdrs++;
			if (sdret < 0) {
				brcmf_err("RXHEADER FAILED: %d\n",
					  sdret);
				bus->sdcnt.rx_hdrfail++;
				brcmf_sdbrcm_rxfail(bus, true, true);
				sdio_release_host(bus->sdiodev->func[1]);
				continue;
			}

			brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
					   bus->rxhdr, SDPCM_HDRLEN,
					   "RxHdr:\n");

			if (brcmf_sdio_hdparser(bus, bus->rxhdr, rd,
						BRCMF_SDIO_FT_NORMAL)) {
				sdio_release_host(bus->sdiodev->func[1]);
				if (!bus->rxpending)
					break;
				else
					continue;
			}

			if (rd->channel == SDPCM_CONTROL_CHANNEL) {
				brcmf_sdbrcm_read_control(bus, bus->rxhdr,
							  rd->len,
							  rd->dat_offset);
				/* prepare the descriptor for the next read */
				rd->len = rd->len_nxtfrm << 4;
				rd->len_nxtfrm = 0;
				/* treat all packet as event if we don't know */
				rd->channel = SDPCM_EVENT_CHANNEL;
				sdio_release_host(bus->sdiodev->func[1]);
				continue;
			}
			rd->len_left = rd->len > BRCMF_FIRSTREAD ?
				       rd->len - BRCMF_FIRSTREAD : 0;
			head_read = BRCMF_FIRSTREAD;
		}

		brcmf_pad(bus, &pad, &rd->len_left);

		pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read +
					    BRCMF_SDALIGN);
		if (!pkt) {
			/* Give up on data, request rtx of events */
			brcmf_err("brcmu_pkt_buf_get_skb failed\n");
			brcmf_sdbrcm_rxfail(bus, false,
					    RETRYCHAN(rd->channel));
			sdio_release_host(bus->sdiodev->func[1]);
			continue;
		}
		skb_pull(pkt, head_read);
		pkt_align(pkt, rd->len_left, BRCMF_SDALIGN);

		sdret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad,
					      SDIO_FUNC_2, F2SYNC, pkt);
		bus->sdcnt.f2rxdata++;
		sdio_release_host(bus->sdiodev->func[1]);

		if (sdret < 0) {
			brcmf_err("read %d bytes from channel %d failed: %d\n",
				  rd->len, rd->channel, sdret);
			brcmu_pkt_buf_free_skb(pkt);
			sdio_claim_host(bus->sdiodev->func[1]);
			brcmf_sdbrcm_rxfail(bus, true,
					    RETRYCHAN(rd->channel));
			sdio_release_host(bus->sdiodev->func[1]);
			continue;
		}

		if (head_read) {
			skb_push(pkt, head_read);
			memcpy(pkt->data, bus->rxhdr, head_read);
			head_read = 0;
		} else {
			memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
			rd_new.seq_num = rd->seq_num;
			sdio_claim_host(bus->sdiodev->func[1]);
			if (brcmf_sdio_hdparser(bus, bus->rxhdr, &rd_new,
						BRCMF_SDIO_FT_NORMAL)) {
				rd->len = 0;
				brcmu_pkt_buf_free_skb(pkt);
			}
			bus->sdcnt.rx_readahead_cnt++;
			if (rd->len != roundup(rd_new.len, 16)) {
				brcmf_err("frame length mismatch:read %d, should be %d\n",
					  rd->len,
					  roundup(rd_new.len, 16) >> 4);
				rd->len = 0;
				brcmf_sdbrcm_rxfail(bus, true, true);
				sdio_release_host(bus->sdiodev->func[1]);
				brcmu_pkt_buf_free_skb(pkt);
				continue;
			}
			sdio_release_host(bus->sdiodev->func[1]);
			rd->len_nxtfrm = rd_new.len_nxtfrm;
			rd->channel = rd_new.channel;
			rd->dat_offset = rd_new.dat_offset;

			brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
					     BRCMF_DATA_ON()) &&
					   BRCMF_HDRS_ON(),
					   bus->rxhdr, SDPCM_HDRLEN,
					   "RxHdr:\n");

			if (rd_new.channel == SDPCM_CONTROL_CHANNEL) {
				brcmf_err("readahead on control packet %d?\n",
					  rd_new.seq_num);
				/* Force retry w/normal header read */
				rd->len = 0;
				sdio_claim_host(bus->sdiodev->func[1]);
				brcmf_sdbrcm_rxfail(bus, false, true);
				sdio_release_host(bus->sdiodev->func[1]);
				brcmu_pkt_buf_free_skb(pkt);
				continue;
			}
		}

		brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
				   pkt->data, rd->len, "Rx Data:\n");

		/* Save superframe descriptor and allocate packet frame */
		if (rd->channel == SDPCM_GLOM_CHANNEL) {
			if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_FRAMETAG_LEN])) {
				brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
					  rd->len);
				brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
						   pkt->data, rd->len,
						   "Glom Data:\n");
				__skb_trim(pkt, rd->len);
				skb_pull(pkt, SDPCM_HDRLEN);
				bus->glomd = pkt;
			} else {
				brcmf_err("%s: glom superframe w/o "
					  "descriptor!\n", __func__);
				sdio_claim_host(bus->sdiodev->func[1]);
				brcmf_sdbrcm_rxfail(bus, false, false);
				sdio_release_host(bus->sdiodev->func[1]);
			}
			/* prepare the descriptor for the next read */
			rd->len = rd->len_nxtfrm << 4;
			rd->len_nxtfrm = 0;
			/* treat all packet as event if we don't know */
			rd->channel = SDPCM_EVENT_CHANNEL;
			continue;
		}

		/* Fill in packet len and prio, deliver upward */
		__skb_trim(pkt, rd->len);
		skb_pull(pkt, rd->dat_offset);

		/* prepare the descriptor for the next read */
		rd->len = rd->len_nxtfrm << 4;
		rd->len_nxtfrm = 0;
		/* treat all packet as event if we don't know */
		rd->channel = SDPCM_EVENT_CHANNEL;

		if (pkt->len == 0) {
			brcmu_pkt_buf_free_skb(pkt);
			continue;
		}

		skb_queue_head_init(&pktlist);
		skb_queue_tail(&pktlist, pkt);
		brcmf_rx_frames(bus->sdiodev->dev, &pktlist);
	}

	rxcount = maxframes - rxleft;
	/* Message if we hit the limit */
	if (!rxleft)
		brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes);
	else
		brcmf_dbg(DATA, "processed %d frames\n", rxcount);
	/* Back off rxseq if awaiting rtx, update rx_seq */
	if (bus->rxskip)
		rd->seq_num--;
	bus->rx_seq = rd->seq_num;

	return rxcount;
}

static void
brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus)
{
	if (waitqueue_active(&bus->ctrl_wait))
		wake_up_interruptible(&bus->ctrl_wait);
	return;
}

/* Writes a HW/SW header into the packet and sends it. */
/* Assumes: (a) header space already there, (b) caller holds lock */
static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
			      uint chan, bool free_pkt)
{
	int ret;
	u8 *frame;
	u16 len, pad = 0;
	u32 swheader;
	struct sk_buff *new;
	int i;

	brcmf_dbg(TRACE, "Enter\n");

	frame = (u8 *) (pkt->data);

	/* Add alignment padding, allocate new packet if needed */
	pad = ((unsigned long)frame % BRCMF_SDALIGN);
	if (pad) {
		if (skb_headroom(pkt) < pad) {
			brcmf_dbg(INFO, "insufficient headroom %d for %d pad\n",
				  skb_headroom(pkt), pad);
			bus->sdiodev->bus_if->tx_realloc++;
			new = brcmu_pkt_buf_get_skb(pkt->len + BRCMF_SDALIGN);
			if (!new) {
				brcmf_err("couldn't allocate new %d-byte packet\n",
					  pkt->len + BRCMF_SDALIGN);
				ret = -ENOMEM;
				goto done;
			}

			pkt_align(new, pkt->len, BRCMF_SDALIGN);
			memcpy(new->data, pkt->data, pkt->len);
			if (free_pkt)
				brcmu_pkt_buf_free_skb(pkt);
			/* free the pkt if canned one is not used */
			free_pkt = true;
			pkt = new;
			frame = (u8 *) (pkt->data);
			/* precondition: (frame % BRCMF_SDALIGN) == 0) */
			pad = 0;
		} else {
			skb_push(pkt, pad);
			frame = (u8 *) (pkt->data);
			/* precondition: pad + SDPCM_HDRLEN <= pkt->len */
			memset(frame, 0, pad + SDPCM_HDRLEN);
		}
	}
	/* precondition: pad < BRCMF_SDALIGN */

	/* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
	len = (u16) (pkt->len);
	*(__le16 *) frame = cpu_to_le16(len);
	*(((__le16 *) frame) + 1) = cpu_to_le16(~len);

	/* Software tag: channel, sequence number, data offset */
	swheader =
	    ((chan << SDPCM_CHANNEL_SHIFT) & SDPCM_CHANNEL_MASK) | bus->tx_seq |
	    (((pad +
	       SDPCM_HDRLEN) << SDPCM_DOFFSET_SHIFT) & SDPCM_DOFFSET_MASK);

	put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
	put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));

#ifdef DEBUG
	tx_packets[pkt->priority]++;
#endif

	brcmf_dbg_hex_dump(BRCMF_BYTES_ON() &&
			   ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
			    (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)),
			   frame, len, "Tx Frame:\n");
	brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
			     ((BRCMF_CTL_ON() &&
			       chan == SDPCM_CONTROL_CHANNEL) ||
			      (BRCMF_DATA_ON() &&
			       chan != SDPCM_CONTROL_CHANNEL))) &&
			   BRCMF_HDRS_ON(),
			   frame, min_t(u16, len, 16), "TxHdr:\n");

	/* Raise len to next SDIO block to eliminate tail command */
	if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
		u16 pad = bus->blocksize - (len % bus->blocksize);
		if ((pad <= bus->roundup) && (pad < bus->blocksize))
				len += pad;
	} else if (len % BRCMF_SDALIGN) {
		len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
	}

	/* Some controllers have trouble with odd bytes -- round to even */
	if (len & (ALIGNMENT - 1))
			len = roundup(len, ALIGNMENT);

	sdio_claim_host(bus->sdiodev->func[1]);
	ret = brcmf_sdcard_send_pkt(bus->sdiodev, bus->sdiodev->sbwad,
				    SDIO_FUNC_2, F2SYNC, pkt);
	bus->sdcnt.f2txdata++;

	if (ret < 0) {
		/* On failure, abort the command and terminate the frame */
		brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
			  ret);
		bus->sdcnt.tx_sderrs++;

		brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
		brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
				 SFC_WF_TERM, NULL);
		bus->sdcnt.f1regdata++;

		for (i = 0; i < 3; i++) {
			u8 hi, lo;
			hi = brcmf_sdio_regrb(bus->sdiodev,
					      SBSDIO_FUNC1_WFRAMEBCHI, NULL);
			lo = brcmf_sdio_regrb(bus->sdiodev,
					      SBSDIO_FUNC1_WFRAMEBCLO, NULL);
			bus->sdcnt.f1regdata += 2;
			if ((hi == 0) && (lo == 0))
				break;
		}

	}
	sdio_release_host(bus->sdiodev->func[1]);
	if (ret == 0)
		bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;

done:
	/* restore pkt buffer pointer before calling tx complete routine */
	skb_pull(pkt, SDPCM_HDRLEN + pad);
	brcmf_txcomplete(bus->sdiodev->dev, pkt, ret != 0);

	if (free_pkt)
		brcmu_pkt_buf_free_skb(pkt);

	return ret;
}

static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes)
{
	struct sk_buff *pkt;
	u32 intstatus = 0;
	int ret = 0, prec_out;
	uint cnt = 0;
	uint datalen;
	u8 tx_prec_map;

	brcmf_dbg(TRACE, "Enter\n");

	tx_prec_map = ~bus->flowcontrol;

	/* Send frames until the limit or some other event */
	for (cnt = 0; (cnt < maxframes) && data_ok(bus); cnt++) {
		spin_lock_bh(&bus->txqlock);
		pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map, &prec_out);
		if (pkt == NULL) {
			spin_unlock_bh(&bus->txqlock);
			break;
		}
		spin_unlock_bh(&bus->txqlock);
		datalen = pkt->len - SDPCM_HDRLEN;

		ret = brcmf_sdbrcm_txpkt(bus, pkt, SDPCM_DATA_CHANNEL, true);

		/* In poll mode, need to check for other events */
		if (!bus->intr && cnt) {
			/* Check device status, signal pending interrupt */
			sdio_claim_host(bus->sdiodev->func[1]);
			ret = r_sdreg32(bus, &intstatus,
					offsetof(struct sdpcmd_regs,
						 intstatus));
			sdio_release_host(bus->sdiodev->func[1]);
			bus->sdcnt.f2txdata++;
			if (ret != 0)
				break;
			if (intstatus & bus->hostintmask)
				atomic_set(&bus->ipend, 1);
		}
	}

	/* Deflow-control stack if needed */
	if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) &&
	    bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
		bus->txoff = false;
		brcmf_txflowblock(bus->sdiodev->dev, false);
	}

	return cnt;
}

static void brcmf_sdbrcm_bus_stop(struct device *dev)
{
	u32 local_hostintmask;
	u8 saveclk;
	int err;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
	struct brcmf_sdio *bus = sdiodev->bus;

	brcmf_dbg(TRACE, "Enter\n");

	if (bus->watchdog_tsk) {
		send_sig(SIGTERM, bus->watchdog_tsk, 1);
		kthread_stop(bus->watchdog_tsk);
		bus->watchdog_tsk = NULL;
	}

	sdio_claim_host(bus->sdiodev->func[1]);

	/* Enable clock for device interrupts */
	brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);

	/* Disable and clear interrupts at the chip level also */
	w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask));
	local_hostintmask = bus->hostintmask;
	bus->hostintmask = 0;

	/* Change our idea of bus state */
	bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;

	/* Force clocks on backplane to be sure F2 interrupt propagates */
	saveclk = brcmf_sdio_regrb(bus->sdiodev,
				   SBSDIO_FUNC1_CHIPCLKCSR, &err);
	if (!err) {
		brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
				 (saveclk | SBSDIO_FORCE_HT), &err);
	}
	if (err)
		brcmf_err("Failed to force clock for F2: err %d\n", err);

	/* Turn off the bus (F2), free any pending packets */
	brcmf_dbg(INTR, "disable SDIO interrupts\n");
	brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, SDIO_FUNC_ENABLE_1,
			 NULL);

	/* Clear any pending interrupts now that F2 is disabled */
	w_sdreg32(bus, local_hostintmask,
		  offsetof(struct sdpcmd_regs, intstatus));

	/* Turn off the backplane clock (only) */
	brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
	sdio_release_host(bus->sdiodev->func[1]);

	/* Clear the data packet queues */
	brcmu_pktq_flush(&bus->txq, true, NULL, NULL);

	/* Clear any held glomming stuff */
	if (bus->glomd)
		brcmu_pkt_buf_free_skb(bus->glomd);
	brcmf_sdbrcm_free_glom(bus);

	/* Clear rx control and wake any waiters */
	spin_lock_bh(&bus->rxctl_lock);
	bus->rxlen = 0;
	spin_unlock_bh(&bus->rxctl_lock);
	brcmf_sdbrcm_dcmd_resp_wake(bus);

	/* Reset some F2 state stuff */
	bus->rxskip = false;
	bus->tx_seq = bus->rx_seq = 0;
}

#ifdef CONFIG_BRCMFMAC_SDIO_OOB
static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus)
{
	unsigned long flags;

	spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags);
	if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) {
		enable_irq(bus->sdiodev->irq);
		bus->sdiodev->irq_en = true;
	}
	spin_unlock_irqrestore(&bus->sdiodev->irq_en_lock, flags);
}
#else
static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus)
{
}
#endif		/* CONFIG_BRCMFMAC_SDIO_OOB */

static inline void brcmf_sdbrcm_adddpctsk(struct brcmf_sdio *bus)
{
	struct list_head *new_hd;
	unsigned long flags;

	if (in_interrupt())
		new_hd = kzalloc(sizeof(struct list_head), GFP_ATOMIC);
	else
		new_hd = kzalloc(sizeof(struct list_head), GFP_KERNEL);
	if (new_hd == NULL)
		return;

	spin_lock_irqsave(&bus->dpc_tl_lock, flags);
	list_add_tail(new_hd, &bus->dpc_tsklst);
	spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
}

static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus)
{
	u8 idx;
	u32 addr;
	unsigned long val;
	int n, ret;

	idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
	addr = bus->ci->c_inf[idx].base +
	       offsetof(struct sdpcmd_regs, intstatus);

	ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, false);
	bus->sdcnt.f1regdata++;
	if (ret != 0)
		val = 0;

	val &= bus->hostintmask;
	atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE));

	/* Clear interrupts */
	if (val) {
		ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, true);
		bus->sdcnt.f1regdata++;
	}

	if (ret) {
		atomic_set(&bus->intstatus, 0);
	} else if (val) {
		for_each_set_bit(n, &val, 32)
			set_bit(n, (unsigned long *)&bus->intstatus.counter);
	}

	return ret;
}

static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
{
	u32 newstatus = 0;
	unsigned long intstatus;
	uint rxlimit = bus->rxbound;	/* Rx frames to read before resched */
	uint txlimit = bus->txbound;	/* Tx frames to send before resched */
	uint framecnt = 0;	/* Temporary counter of tx/rx frames */
	int err = 0, n;

	brcmf_dbg(TRACE, "Enter\n");

	sdio_claim_host(bus->sdiodev->func[1]);

	/* If waiting for HTAVAIL, check status */
	if (bus->clkstate == CLK_PENDING) {
		u8 clkctl, devctl = 0;

#ifdef DEBUG
		/* Check for inconsistent device control */
		devctl = brcmf_sdio_regrb(bus->sdiodev,
					  SBSDIO_DEVICE_CTL, &err);
		if (err) {
			brcmf_err("error reading DEVCTL: %d\n", err);
			bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
		}
#endif				/* DEBUG */

		/* Read CSR, if clock on switch to AVAIL, else ignore */
		clkctl = brcmf_sdio_regrb(bus->sdiodev,
					  SBSDIO_FUNC1_CHIPCLKCSR, &err);
		if (err) {
			brcmf_err("error reading CSR: %d\n",
				  err);
			bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
		}

		brcmf_dbg(INFO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
			  devctl, clkctl);

		if (SBSDIO_HTAV(clkctl)) {
			devctl = brcmf_sdio_regrb(bus->sdiodev,
						  SBSDIO_DEVICE_CTL, &err);
			if (err) {
				brcmf_err("error reading DEVCTL: %d\n",
					  err);
				bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
			}
			devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
			brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
					 devctl, &err);
			if (err) {
				brcmf_err("error writing DEVCTL: %d\n",
					  err);
				bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
			}
			bus->clkstate = CLK_AVAIL;
		}
	}

	/* Make sure backplane clock is on */
	brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, true);

	/* Pending interrupt indicates new device status */
	if (atomic_read(&bus->ipend) > 0) {
		atomic_set(&bus->ipend, 0);
		err = brcmf_sdio_intr_rstatus(bus);
	}

	/* Start with leftover status bits */
	intstatus = atomic_xchg(&bus->intstatus, 0);

	/* Handle flow-control change: read new state in case our ack
	 * crossed another change interrupt.  If change still set, assume
	 * FC ON for safety, let next loop through do the debounce.
	 */
	if (intstatus & I_HMB_FC_CHANGE) {
		intstatus &= ~I_HMB_FC_CHANGE;
		err = w_sdreg32(bus, I_HMB_FC_CHANGE,
				offsetof(struct sdpcmd_regs, intstatus));

		err = r_sdreg32(bus, &newstatus,
				offsetof(struct sdpcmd_regs, intstatus));
		bus->sdcnt.f1regdata += 2;
		atomic_set(&bus->fcstate,
			   !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)));
		intstatus |= (newstatus & bus->hostintmask);
	}

	/* Handle host mailbox indication */
	if (intstatus & I_HMB_HOST_INT) {
		intstatus &= ~I_HMB_HOST_INT;
		intstatus |= brcmf_sdbrcm_hostmail(bus);
	}

	sdio_release_host(bus->sdiodev->func[1]);

	/* Generally don't ask for these, can get CRC errors... */
	if (intstatus & I_WR_OOSYNC) {
		brcmf_err("Dongle reports WR_OOSYNC\n");
		intstatus &= ~I_WR_OOSYNC;
	}

	if (intstatus & I_RD_OOSYNC) {
		brcmf_err("Dongle reports RD_OOSYNC\n");
		intstatus &= ~I_RD_OOSYNC;
	}

	if (intstatus & I_SBINT) {
		brcmf_err("Dongle reports SBINT\n");
		intstatus &= ~I_SBINT;
	}

	/* Would be active due to wake-wlan in gSPI */
	if (intstatus & I_CHIPACTIVE) {
		brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
		intstatus &= ~I_CHIPACTIVE;
	}

	/* Ignore frame indications if rxskip is set */
	if (bus->rxskip)
		intstatus &= ~I_HMB_FRAME_IND;

	/* On frame indication, read available frames */
	if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) {
		framecnt = brcmf_sdio_readframes(bus, rxlimit);
		if (!bus->rxpending)
			intstatus &= ~I_HMB_FRAME_IND;
		rxlimit -= min(framecnt, rxlimit);
	}

	/* Keep still-pending events for next scheduling */
	if (intstatus) {
		for_each_set_bit(n, &intstatus, 32)
			set_bit(n, (unsigned long *)&bus->intstatus.counter);
	}

	brcmf_sdbrcm_clrintr(bus);

	if (data_ok(bus) && bus->ctrl_frame_stat &&
		(bus->clkstate == CLK_AVAIL)) {
		int i;

		sdio_claim_host(bus->sdiodev->func[1]);
		err = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
			SDIO_FUNC_2, F2SYNC, bus->ctrl_frame_buf,
			(u32) bus->ctrl_frame_len);

		if (err < 0) {
			/* On failure, abort the command and
				terminate the frame */
			brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
				  err);
			bus->sdcnt.tx_sderrs++;

			brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);

			brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
					 SFC_WF_TERM, &err);
			bus->sdcnt.f1regdata++;

			for (i = 0; i < 3; i++) {
				u8 hi, lo;
				hi = brcmf_sdio_regrb(bus->sdiodev,
						      SBSDIO_FUNC1_WFRAMEBCHI,
						      &err);
				lo = brcmf_sdio_regrb(bus->sdiodev,
						      SBSDIO_FUNC1_WFRAMEBCLO,
						      &err);
				bus->sdcnt.f1regdata += 2;
				if ((hi == 0) && (lo == 0))
					break;
			}

		} else {
			bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
		}
		sdio_release_host(bus->sdiodev->func[1]);
		bus->ctrl_frame_stat = false;
		brcmf_sdbrcm_wait_event_wakeup(bus);
	}
	/* Send queued frames (limit 1 if rx may still be pending) */
	else if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
		 brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit
		 && data_ok(bus)) {
		framecnt = bus->rxpending ? min(txlimit, bus->txminmax) :
					    txlimit;
		framecnt = brcmf_sdbrcm_sendfromq(bus, framecnt);
		txlimit -= framecnt;
	}

	if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) || (err != 0)) {
		brcmf_err("failed backplane access over SDIO, halting operation\n");
		bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
		atomic_set(&bus->intstatus, 0);
	} else if (atomic_read(&bus->intstatus) ||
		   atomic_read(&bus->ipend) > 0 ||
		   (!atomic_read(&bus->fcstate) &&
		    brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
		    data_ok(bus)) || PKT_AVAILABLE()) {
		brcmf_sdbrcm_adddpctsk(bus);
	}

	/* If we're done for now, turn off clock request. */
	if ((bus->clkstate != CLK_PENDING)
	    && bus->idletime == BRCMF_IDLE_IMMEDIATE) {
		bus->activity = false;
		sdio_claim_host(bus->sdiodev->func[1]);
		brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
		sdio_release_host(bus->sdiodev->func[1]);
	}
}

static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt)
{
	int ret = -EBADE;
	uint datalen, prec;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
	struct brcmf_sdio *bus = sdiodev->bus;
	unsigned long flags;

	brcmf_dbg(TRACE, "Enter\n");

	datalen = pkt->len;

	/* Add space for the header */
	skb_push(pkt, SDPCM_HDRLEN);
	/* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */

	prec = prio2prec((pkt->priority & PRIOMASK));

	/* Check for existing queue, current flow-control,
			 pending event, or pending clock */
	brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
	bus->sdcnt.fcqueued++;

	/* Priority based enq */
	spin_lock_bh(&bus->txqlock);
	if (!brcmf_c_prec_enq(bus->sdiodev->dev, &bus->txq, pkt, prec)) {
		skb_pull(pkt, SDPCM_HDRLEN);
		brcmf_txcomplete(bus->sdiodev->dev, pkt, false);
		brcmu_pkt_buf_free_skb(pkt);
		brcmf_err("out of bus->txq !!!\n");
		ret = -ENOSR;
	} else {
		ret = 0;
	}
	spin_unlock_bh(&bus->txqlock);

	if (pktq_len(&bus->txq) >= TXHI) {
		bus->txoff = true;
		brcmf_txflowblock(bus->sdiodev->dev, true);
	}

#ifdef DEBUG
	if (pktq_plen(&bus->txq, prec) > qcount[prec])
		qcount[prec] = pktq_plen(&bus->txq, prec);
#endif

	spin_lock_irqsave(&bus->dpc_tl_lock, flags);
	if (list_empty(&bus->dpc_tsklst)) {
		spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);

		brcmf_sdbrcm_adddpctsk(bus);
		queue_work(bus->brcmf_wq, &bus->datawork);
	} else {
		spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
	}

	return ret;
}

static int
brcmf_sdbrcm_membytes(struct brcmf_sdio *bus, bool write, u32 address, u8 *data,
		 uint size)
{
	int bcmerror = 0;
	u32 sdaddr;
	uint dsize;

	/* Determine initial transfer parameters */
	sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
	if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
		dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
	else
		dsize = size;

	sdio_claim_host(bus->sdiodev->func[1]);

	/* Set the backplane window to include the start address */
	bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev, address);
	if (bcmerror) {
		brcmf_err("window change failed\n");
		goto xfer_done;
	}

	/* Do the transfer(s) */
	while (size) {
		brcmf_dbg(INFO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
			  write ? "write" : "read", dsize,
			  sdaddr, address & SBSDIO_SBWINDOW_MASK);
		bcmerror = brcmf_sdcard_rwdata(bus->sdiodev, write,
					       sdaddr, data, dsize);
		if (bcmerror) {
			brcmf_err("membytes transfer failed\n");
			break;
		}

		/* Adjust for next transfer (if any) */
		size -= dsize;
		if (size) {
			data += dsize;
			address += dsize;
			bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev,
								  address);
			if (bcmerror) {
				brcmf_err("window change failed\n");
				break;
			}
			sdaddr = 0;
			dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
		}
	}

xfer_done:
	/* Return the window to backplane enumeration space for core access */
	if (brcmf_sdcard_set_sbaddr_window(bus->sdiodev, bus->sdiodev->sbwad))
		brcmf_err("FAILED to set window back to 0x%x\n",
			  bus->sdiodev->sbwad);

	sdio_release_host(bus->sdiodev->func[1]);

	return bcmerror;
}

#ifdef DEBUG
#define CONSOLE_LINE_MAX	192

static int brcmf_sdbrcm_readconsole(struct brcmf_sdio *bus)
{
	struct brcmf_console *c = &bus->console;
	u8 line[CONSOLE_LINE_MAX], ch;
	u32 n, idx, addr;
	int rv;

	/* Don't do anything until FWREADY updates console address */
	if (bus->console_addr == 0)
		return 0;

	/* Read console log struct */
	addr = bus->console_addr + offsetof(struct rte_console, log_le);
	rv = brcmf_sdbrcm_membytes(bus, false, addr, (u8 *)&c->log_le,
				   sizeof(c->log_le));
	if (rv < 0)
		return rv;

	/* Allocate console buffer (one time only) */
	if (c->buf == NULL) {
		c->bufsize = le32_to_cpu(c->log_le.buf_size);
		c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
		if (c->buf == NULL)
			return -ENOMEM;
	}

	idx = le32_to_cpu(c->log_le.idx);

	/* Protect against corrupt value */
	if (idx > c->bufsize)
		return -EBADE;

	/* Skip reading the console buffer if the index pointer
	 has not moved */
	if (idx == c->last)
		return 0;

	/* Read the console buffer */
	addr = le32_to_cpu(c->log_le.buf);
	rv = brcmf_sdbrcm_membytes(bus, false, addr, c->buf, c->bufsize);
	if (rv < 0)
		return rv;

	while (c->last != idx) {
		for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
			if (c->last == idx) {
				/* This would output a partial line.
				 * Instead, back up
				 * the buffer pointer and output this
				 * line next time around.
				 */
				if (c->last >= n)
					c->last -= n;
				else
					c->last = c->bufsize - n;
				goto break2;
			}
			ch = c->buf[c->last];
			c->last = (c->last + 1) % c->bufsize;
			if (ch == '\n')
				break;
			line[n] = ch;
		}

		if (n > 0) {
			if (line[n - 1] == '\r')
				n--;
			line[n] = 0;
			pr_debug("CONSOLE: %s\n", line);
		}
	}
break2:

	return 0;
}
#endif				/* DEBUG */

static int brcmf_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
{
	int i;
	int ret;

	bus->ctrl_frame_stat = false;
	ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
				    SDIO_FUNC_2, F2SYNC, frame, len);

	if (ret < 0) {
		/* On failure, abort the command and terminate the frame */
		brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
			  ret);
		bus->sdcnt.tx_sderrs++;

		brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);

		brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
				 SFC_WF_TERM, NULL);
		bus->sdcnt.f1regdata++;

		for (i = 0; i < 3; i++) {
			u8 hi, lo;
			hi = brcmf_sdio_regrb(bus->sdiodev,
					      SBSDIO_FUNC1_WFRAMEBCHI, NULL);
			lo = brcmf_sdio_regrb(bus->sdiodev,
					      SBSDIO_FUNC1_WFRAMEBCLO, NULL);
			bus->sdcnt.f1regdata += 2;
			if (hi == 0 && lo == 0)
				break;
		}
		return ret;
	}

	bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;

	return ret;
}

static int
brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
{
	u8 *frame;
	u16 len;
	u32 swheader;
	uint retries = 0;
	u8 doff = 0;
	int ret = -1;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
	struct brcmf_sdio *bus = sdiodev->bus;
	unsigned long flags;

	brcmf_dbg(TRACE, "Enter\n");

	/* Back the pointer to make a room for bus header */
	frame = msg - SDPCM_HDRLEN;
	len = (msglen += SDPCM_HDRLEN);

	/* Add alignment padding (optional for ctl frames) */
	doff = ((unsigned long)frame % BRCMF_SDALIGN);
	if (doff) {
		frame -= doff;
		len += doff;
		msglen += doff;
		memset(frame, 0, doff + SDPCM_HDRLEN);
	}
	/* precondition: doff < BRCMF_SDALIGN */
	doff += SDPCM_HDRLEN;

	/* Round send length to next SDIO block */
	if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
		u16 pad = bus->blocksize - (len % bus->blocksize);
		if ((pad <= bus->roundup) && (pad < bus->blocksize))
			len += pad;
	} else if (len % BRCMF_SDALIGN) {
		len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
	}

	/* Satisfy length-alignment requirements */
	if (len & (ALIGNMENT - 1))
		len = roundup(len, ALIGNMENT);

	/* precondition: IS_ALIGNED((unsigned long)frame, 2) */

	/* Make sure backplane clock is on */
	sdio_claim_host(bus->sdiodev->func[1]);
	brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
	sdio_release_host(bus->sdiodev->func[1]);

	/* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
	*(__le16 *) frame = cpu_to_le16((u16) msglen);
	*(((__le16 *) frame) + 1) = cpu_to_le16(~msglen);

	/* Software tag: channel, sequence number, data offset */
	swheader =
	    ((SDPCM_CONTROL_CHANNEL << SDPCM_CHANNEL_SHIFT) &
	     SDPCM_CHANNEL_MASK)
	    | bus->tx_seq | ((doff << SDPCM_DOFFSET_SHIFT) &
			     SDPCM_DOFFSET_MASK);
	put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
	put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));

	if (!data_ok(bus)) {
		brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
			  bus->tx_max, bus->tx_seq);
		bus->ctrl_frame_stat = true;
		/* Send from dpc */
		bus->ctrl_frame_buf = frame;
		bus->ctrl_frame_len = len;

		wait_event_interruptible_timeout(bus->ctrl_wait,
						 !bus->ctrl_frame_stat,
						 msecs_to_jiffies(2000));

		if (!bus->ctrl_frame_stat) {
			brcmf_dbg(INFO, "ctrl_frame_stat == false\n");
			ret = 0;
		} else {
			brcmf_dbg(INFO, "ctrl_frame_stat == true\n");
			ret = -1;
		}
	}

	if (ret == -1) {
		brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
				   frame, len, "Tx Frame:\n");
		brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
				   BRCMF_HDRS_ON(),
				   frame, min_t(u16, len, 16), "TxHdr:\n");

		do {
			sdio_claim_host(bus->sdiodev->func[1]);
			ret = brcmf_tx_frame(bus, frame, len);
			sdio_release_host(bus->sdiodev->func[1]);
		} while (ret < 0 && retries++ < TXRETRIES);
	}

	spin_lock_irqsave(&bus->dpc_tl_lock, flags);
	if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) &&
	    list_empty(&bus->dpc_tsklst)) {
		spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);

		bus->activity = false;
		sdio_claim_host(bus->sdiodev->func[1]);
		brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
		sdio_release_host(bus->sdiodev->func[1]);
	} else {
		spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
	}

	if (ret)
		bus->sdcnt.tx_ctlerrs++;
	else
		bus->sdcnt.tx_ctlpkts++;

	return ret ? -EIO : 0;
}

#ifdef DEBUG
static inline bool brcmf_sdio_valid_shared_address(u32 addr)
{
	return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
}

static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
				 struct sdpcm_shared *sh)
{
	u32 addr;
	int rv;
	u32 shaddr = 0;
	struct sdpcm_shared_le sh_le;
	__le32 addr_le;

	shaddr = bus->ramsize - 4;

	/*
	 * Read last word in socram to determine
	 * address of sdpcm_shared structure
	 */
	sdio_claim_host(bus->sdiodev->func[1]);
	brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
	rv = brcmf_sdbrcm_membytes(bus, false, shaddr,
				   (u8 *)&addr_le, 4);
	sdio_release_host(bus->sdiodev->func[1]);
	if (rv < 0)
		return rv;

	addr = le32_to_cpu(addr_le);

	brcmf_dbg(INFO, "sdpcm_shared address 0x%08X\n", addr);

	/*
	 * Check if addr is valid.
	 * NVRAM length at the end of memory should have been overwritten.
	 */
	if (!brcmf_sdio_valid_shared_address(addr)) {
			brcmf_err("invalid sdpcm_shared address 0x%08X\n",
				  addr);
			return -EINVAL;
	}

	/* Read hndrte_shared structure */
	rv = brcmf_sdbrcm_membytes(bus, false, addr, (u8 *)&sh_le,
				   sizeof(struct sdpcm_shared_le));
	if (rv < 0)
		return rv;

	/* Endianness */
	sh->flags = le32_to_cpu(sh_le.flags);
	sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
	sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
	sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
	sh->assert_line = le32_to_cpu(sh_le.assert_line);
	sh->console_addr = le32_to_cpu(sh_le.console_addr);
	sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);

	if ((sh->flags & SDPCM_SHARED_VERSION_MASK) != SDPCM_SHARED_VERSION) {
		brcmf_err("sdpcm_shared version mismatch: dhd %d dongle %d\n",
			  SDPCM_SHARED_VERSION,
			  sh->flags & SDPCM_SHARED_VERSION_MASK);
		return -EPROTO;
	}

	return 0;
}

static int brcmf_sdio_dump_console(struct brcmf_sdio *bus,
				   struct sdpcm_shared *sh, char __user *data,
				   size_t count)
{
	u32 addr, console_ptr, console_size, console_index;
	char *conbuf = NULL;
	__le32 sh_val;
	int rv;
	loff_t pos = 0;
	int nbytes = 0;

	/* obtain console information from device memory */
	addr = sh->console_addr + offsetof(struct rte_console, log_le);
	rv = brcmf_sdbrcm_membytes(bus, false, addr,
			(u8 *)&sh_val, sizeof(u32));
	if (rv < 0)
		return rv;
	console_ptr = le32_to_cpu(sh_val);

	addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
	rv = brcmf_sdbrcm_membytes(bus, false, addr,
			(u8 *)&sh_val, sizeof(u32));
	if (rv < 0)
		return rv;
	console_size = le32_to_cpu(sh_val);

	addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
	rv = brcmf_sdbrcm_membytes(bus, false, addr,
			(u8 *)&sh_val, sizeof(u32));
	if (rv < 0)
		return rv;
	console_index = le32_to_cpu(sh_val);

	/* allocate buffer for console data */
	if (console_size <= CONSOLE_BUFFER_MAX)
		conbuf = vzalloc(console_size+1);

	if (!conbuf)
		return -ENOMEM;

	/* obtain the console data from device */
	conbuf[console_size] = '\0';
	rv = brcmf_sdbrcm_membytes(bus, false, console_ptr, (u8 *)conbuf,
				   console_size);
	if (rv < 0)
		goto done;

	rv = simple_read_from_buffer(data, count, &pos,
				     conbuf + console_index,
				     console_size - console_index);
	if (rv < 0)
		goto done;

	nbytes = rv;
	if (console_index > 0) {
		pos = 0;
		rv = simple_read_from_buffer(data+nbytes, count, &pos,
					     conbuf, console_index - 1);
		if (rv < 0)
			goto done;
		rv += nbytes;
	}
done:
	vfree(conbuf);
	return rv;
}

static int brcmf_sdio_trap_info(struct brcmf_sdio *bus, struct sdpcm_shared *sh,
				char __user *data, size_t count)
{
	int error, res;
	char buf[350];
	struct brcmf_trap_info tr;
	int nbytes;
	loff_t pos = 0;

	if ((sh->flags & SDPCM_SHARED_TRAP) == 0)
		return 0;

	error = brcmf_sdbrcm_membytes(bus, false, sh->trap_addr, (u8 *)&tr,
				      sizeof(struct brcmf_trap_info));
	if (error < 0)
		return error;

	nbytes = brcmf_sdio_dump_console(bus, sh, data, count);
	if (nbytes < 0)
		return nbytes;

	res = scnprintf(buf, sizeof(buf),
			"dongle trap info: type 0x%x @ epc 0x%08x\n"
			"  cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
			"  lr   0x%08x pc   0x%08x offset 0x%x\n"
			"  r0   0x%08x r1   0x%08x r2 0x%08x r3 0x%08x\n"
			"  r4   0x%08x r5   0x%08x r6 0x%08x r7 0x%08x\n",
			le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
			le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
			le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
			le32_to_cpu(tr.pc), sh->trap_addr,
			le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
			le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
			le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
			le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));

	error = simple_read_from_buffer(data+nbytes, count, &pos, buf, res);
	if (error < 0)
		return error;

	nbytes += error;
	return nbytes;
}

static int brcmf_sdio_assert_info(struct brcmf_sdio *bus,
				  struct sdpcm_shared *sh, char __user *data,
				  size_t count)
{
	int error = 0;
	char buf[200];
	char file[80] = "?";
	char expr[80] = "<???>";
	int res;
	loff_t pos = 0;

	if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
		brcmf_dbg(INFO, "firmware not built with -assert\n");
		return 0;
	} else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
		brcmf_dbg(INFO, "no assert in dongle\n");
		return 0;
	}

	sdio_claim_host(bus->sdiodev->func[1]);
	if (sh->assert_file_addr != 0) {
		error = brcmf_sdbrcm_membytes(bus, false, sh->assert_file_addr,
					      (u8 *)file, 80);
		if (error < 0)
			return error;
	}
	if (sh->assert_exp_addr != 0) {
		error = brcmf_sdbrcm_membytes(bus, false, sh->assert_exp_addr,
					      (u8 *)expr, 80);
		if (error < 0)
			return error;
	}
	sdio_release_host(bus->sdiodev->func[1]);

	res = scnprintf(buf, sizeof(buf),
			"dongle assert: %s:%d: assert(%s)\n",
			file, sh->assert_line, expr);
	return simple_read_from_buffer(data, count, &pos, buf, res);
}

static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
{
	int error;
	struct sdpcm_shared sh;

	error = brcmf_sdio_readshared(bus, &sh);

	if (error < 0)
		return error;

	if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
		brcmf_dbg(INFO, "firmware not built with -assert\n");
	else if (sh.flags & SDPCM_SHARED_ASSERT)
		brcmf_err("assertion in dongle\n");

	if (sh.flags & SDPCM_SHARED_TRAP)
		brcmf_err("firmware trap in dongle\n");

	return 0;
}

static int brcmf_sdbrcm_died_dump(struct brcmf_sdio *bus, char __user *data,
				  size_t count, loff_t *ppos)
{
	int error = 0;
	struct sdpcm_shared sh;
	int nbytes = 0;
	loff_t pos = *ppos;

	if (pos != 0)
		return 0;

	error = brcmf_sdio_readshared(bus, &sh);
	if (error < 0)
		goto done;

	error = brcmf_sdio_assert_info(bus, &sh, data, count);
	if (error < 0)
		goto done;

	nbytes = error;
	error = brcmf_sdio_trap_info(bus, &sh, data, count);
	if (error < 0)
		goto done;

	error += nbytes;
	*ppos += error;
done:
	return error;
}

static ssize_t brcmf_sdio_forensic_read(struct file *f, char __user *data,
					size_t count, loff_t *ppos)
{
	struct brcmf_sdio *bus = f->private_data;
	int res;

	res = brcmf_sdbrcm_died_dump(bus, data, count, ppos);
	if (res > 0)
		*ppos += res;
	return (ssize_t)res;
}

static const struct file_operations brcmf_sdio_forensic_ops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read = brcmf_sdio_forensic_read
};

static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
{
	struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
	struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);

	if (IS_ERR_OR_NULL(dentry))
		return;

	debugfs_create_file("forensics", S_IRUGO, dentry, bus,
			    &brcmf_sdio_forensic_ops);
	brcmf_debugfs_create_sdio_count(drvr, &bus->sdcnt);
}
#else
static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
{
	return 0;
}

static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
{
}
#endif /* DEBUG */

static int
brcmf_sdbrcm_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
{
	int timeleft;
	uint rxlen = 0;
	bool pending;
	u8 *buf;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
	struct brcmf_sdio *bus = sdiodev->bus;

	brcmf_dbg(TRACE, "Enter\n");

	/* Wait until control frame is available */
	timeleft = brcmf_sdbrcm_dcmd_resp_wait(bus, &bus->rxlen, &pending);

	spin_lock_bh(&bus->rxctl_lock);
	rxlen = bus->rxlen;
	memcpy(msg, bus->rxctl, min(msglen, rxlen));
	bus->rxctl = NULL;
	buf = bus->rxctl_orig;
	bus->rxctl_orig = NULL;
	bus->rxlen = 0;
	spin_unlock_bh(&bus->rxctl_lock);
	vfree(buf);

	if (rxlen) {
		brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
			  rxlen, msglen);
	} else if (timeleft == 0) {
		brcmf_err("resumed on timeout\n");
		brcmf_sdbrcm_checkdied(bus);
	} else if (pending) {
		brcmf_dbg(CTL, "cancelled\n");
		return -ERESTARTSYS;
	} else {
		brcmf_dbg(CTL, "resumed for unknown reason?\n");
		brcmf_sdbrcm_checkdied(bus);
	}

	if (rxlen)
		bus->sdcnt.rx_ctlpkts++;
	else
		bus->sdcnt.rx_ctlerrs++;

	return rxlen ? (int)rxlen : -ETIMEDOUT;
}

static int brcmf_sdbrcm_write_vars(struct brcmf_sdio *bus)
{
	int bcmerror = 0;
	u32 varaddr;
	u32 varsizew;
	__le32 varsizew_le;
#ifdef DEBUG
	char *nvram_ularray;
#endif				/* DEBUG */

	/* Even if there are no vars are to be written, we still
		 need to set the ramsize. */
	varaddr = (bus->ramsize - 4) - bus->varsz;

	if (bus->vars) {
		/* Write the vars list */
		bcmerror = brcmf_sdbrcm_membytes(bus, true, varaddr,
						 bus->vars, bus->varsz);
#ifdef DEBUG
		/* Verify NVRAM bytes */
		brcmf_dbg(INFO, "Compare NVRAM dl & ul; varsize=%d\n",
			  bus->varsz);
		nvram_ularray = kmalloc(bus->varsz, GFP_ATOMIC);
		if (!nvram_ularray)
			return -ENOMEM;

		/* Upload image to verify downloaded contents. */
		memset(nvram_ularray, 0xaa, bus->varsz);

		/* Read the vars list to temp buffer for comparison */
		bcmerror = brcmf_sdbrcm_membytes(bus, false, varaddr,
						 nvram_ularray, bus->varsz);
		if (bcmerror) {
			brcmf_err("error %d on reading %d nvram bytes at 0x%08x\n",
				  bcmerror, bus->varsz, varaddr);
		}
		/* Compare the org NVRAM with the one read from RAM */
		if (memcmp(bus->vars, nvram_ularray, bus->varsz))
			brcmf_err("Downloaded NVRAM image is corrupted\n");
		else
			brcmf_err("Download/Upload/Compare of NVRAM ok\n");

		kfree(nvram_ularray);
#endif				/* DEBUG */
	}

	/* adjust to the user specified RAM */
	brcmf_dbg(INFO, "Physical memory size: %d\n", bus->ramsize);
	brcmf_dbg(INFO, "Vars are at %d, orig varsize is %d\n",
		  varaddr, bus->varsz);

	/*
	 * Determine the length token:
	 * Varsize, converted to words, in lower 16-bits, checksum
	 * in upper 16-bits.
	 */
	if (bcmerror) {
		varsizew = 0;
		varsizew_le = cpu_to_le32(0);
	} else {
		varsizew = bus->varsz / 4;
		varsizew = (~varsizew << 16) | (varsizew & 0x0000FFFF);
		varsizew_le = cpu_to_le32(varsizew);
	}

	brcmf_dbg(INFO, "New varsize is %d, length token=0x%08x\n",
		  bus->varsz, varsizew);

	/* Write the length token to the last word */
	bcmerror = brcmf_sdbrcm_membytes(bus, true, (bus->ramsize - 4),
					 (u8 *)&varsizew_le, 4);

	return bcmerror;
}

static int brcmf_sdbrcm_download_state(struct brcmf_sdio *bus, bool enter)
{
	int bcmerror = 0;
	struct chip_info *ci = bus->ci;

	/* To enter download state, disable ARM and reset SOCRAM.
	 * To exit download state, simply reset ARM (default is RAM boot).
	 */
	if (enter) {
		bus->alp_only = true;

		ci->coredisable(bus->sdiodev, ci, BCMA_CORE_ARM_CM3);

		ci->resetcore(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM);

		/* Clear the top bit of memory */
		if (bus->ramsize) {
			u32 zeros = 0;
			brcmf_sdbrcm_membytes(bus, true, bus->ramsize - 4,
					 (u8 *)&zeros, 4);
		}
	} else {
		if (!ci->iscoreup(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM)) {
			brcmf_err("SOCRAM core is down after reset?\n");
			bcmerror = -EBADE;
			goto fail;
		}

		bcmerror = brcmf_sdbrcm_write_vars(bus);
		if (bcmerror) {
			brcmf_err("no vars written to RAM\n");
			bcmerror = 0;
		}

		w_sdreg32(bus, 0xFFFFFFFF,
			  offsetof(struct sdpcmd_regs, intstatus));

		ci->resetcore(bus->sdiodev, ci, BCMA_CORE_ARM_CM3);

		/* Allow HT Clock now that the ARM is running. */
		bus->alp_only = false;

		bus->sdiodev->bus_if->state = BRCMF_BUS_LOAD;
	}
fail:
	return bcmerror;
}

static int brcmf_sdbrcm_get_image(char *buf, int len, struct brcmf_sdio *bus)
{
	if (bus->firmware->size < bus->fw_ptr + len)
		len = bus->firmware->size - bus->fw_ptr;

	memcpy(buf, &bus->firmware->data[bus->fw_ptr], len);
	bus->fw_ptr += len;
	return len;
}

static int brcmf_sdbrcm_download_code_file(struct brcmf_sdio *bus)
{
	int offset = 0;
	uint len;
	u8 *memblock = NULL, *memptr;
	int ret;

	brcmf_dbg(INFO, "Enter\n");

	ret = request_firmware(&bus->firmware, BRCMF_SDIO_FW_NAME,
			       &bus->sdiodev->func[2]->dev);
	if (ret) {
		brcmf_err("Fail to request firmware %d\n", ret);
		return ret;
	}
	bus->fw_ptr = 0;

	memptr = memblock = kmalloc(MEMBLOCK + BRCMF_SDALIGN, GFP_ATOMIC);
	if (memblock == NULL) {
		ret = -ENOMEM;
		goto err;
	}
	if ((u32)(unsigned long)memblock % BRCMF_SDALIGN)
		memptr += (BRCMF_SDALIGN -
			   ((u32)(unsigned long)memblock % BRCMF_SDALIGN));

	/* Download image */
	while ((len =
		brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus))) {
		ret = brcmf_sdbrcm_membytes(bus, true, offset, memptr, len);
		if (ret) {
			brcmf_err("error %d on writing %d membytes at 0x%08x\n",
				  ret, MEMBLOCK, offset);
			goto err;
		}

		offset += MEMBLOCK;
	}

err:
	kfree(memblock);

	release_firmware(bus->firmware);
	bus->fw_ptr = 0;

	return ret;
}

/*
 * ProcessVars:Takes a buffer of "<var>=<value>\n" lines read from a file
 * and ending in a NUL.
 * Removes carriage returns, empty lines, comment lines, and converts
 * newlines to NULs.
 * Shortens buffer as needed and pads with NULs.  End of buffer is marked
 * by two NULs.
*/

static int brcmf_process_nvram_vars(struct brcmf_sdio *bus)
{
	char *varbuf;
	char *dp;
	bool findNewline;
	int column;
	int ret = 0;
	uint buf_len, n, len;

	len = bus->firmware->size;
	varbuf = vmalloc(len);
	if (!varbuf)
		return -ENOMEM;

	memcpy(varbuf, bus->firmware->data, len);
	dp = varbuf;

	findNewline = false;
	column = 0;

	for (n = 0; n < len; n++) {
		if (varbuf[n] == 0)
			break;
		if (varbuf[n] == '\r')
			continue;
		if (findNewline && varbuf[n] != '\n')
			continue;
		findNewline = false;
		if (varbuf[n] == '#') {
			findNewline = true;
			continue;
		}
		if (varbuf[n] == '\n') {
			if (column == 0)
				continue;
			*dp++ = 0;
			column = 0;
			continue;
		}
		*dp++ = varbuf[n];
		column++;
	}
	buf_len = dp - varbuf;
	while (dp < varbuf + n)
		*dp++ = 0;

	kfree(bus->vars);
	/* roundup needed for download to device */
	bus->varsz = roundup(buf_len + 1, 4);
	bus->vars = kmalloc(bus->varsz, GFP_KERNEL);
	if (bus->vars == NULL) {
		bus->varsz = 0;
		ret = -ENOMEM;
		goto err;
	}

	/* copy the processed variables and add null termination */
	memcpy(bus->vars, varbuf, buf_len);
	bus->vars[buf_len] = 0;
err:
	vfree(varbuf);
	return ret;
}

static int brcmf_sdbrcm_download_nvram(struct brcmf_sdio *bus)
{
	int ret;

	ret = request_firmware(&bus->firmware, BRCMF_SDIO_NV_NAME,
			       &bus->sdiodev->func[2]->dev);
	if (ret) {
		brcmf_err("Fail to request nvram %d\n", ret);
		return ret;
	}

	ret = brcmf_process_nvram_vars(bus);

	release_firmware(bus->firmware);

	return ret;
}

static int _brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
{
	int bcmerror = -1;

	/* Keep arm in reset */
	if (brcmf_sdbrcm_download_state(bus, true)) {
		brcmf_err("error placing ARM core in reset\n");
		goto err;
	}

	/* External image takes precedence if specified */
	if (brcmf_sdbrcm_download_code_file(bus)) {
		brcmf_err("dongle image file download failed\n");
		goto err;
	}

	/* External nvram takes precedence if specified */
	if (brcmf_sdbrcm_download_nvram(bus))
		brcmf_err("dongle nvram file download failed\n");

	/* Take arm out of reset */
	if (brcmf_sdbrcm_download_state(bus, false)) {
		brcmf_err("error getting out of ARM core reset\n");
		goto err;
	}

	bcmerror = 0;

err:
	return bcmerror;
}

static bool
brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
{
	bool ret;

	sdio_claim_host(bus->sdiodev->func[1]);

	brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);

	ret = _brcmf_sdbrcm_download_firmware(bus) == 0;

	brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);

	sdio_release_host(bus->sdiodev->func[1]);

	return ret;
}

static int brcmf_sdbrcm_bus_init(struct device *dev)
{
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
	struct brcmf_sdio *bus = sdiodev->bus;
	unsigned long timeout;
	u8 ready, enable;
	int err, ret = 0;
	u8 saveclk;

	brcmf_dbg(TRACE, "Enter\n");

	/* try to download image and nvram to the dongle */
	if (bus_if->state == BRCMF_BUS_DOWN) {
		if (!(brcmf_sdbrcm_download_firmware(bus)))
			return -1;
	}

	if (!bus->sdiodev->bus_if->drvr)
		return 0;

	/* Start the watchdog timer */
	bus->sdcnt.tickcnt = 0;
	brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);

	sdio_claim_host(bus->sdiodev->func[1]);

	/* Make sure backplane clock is on, needed to generate F2 interrupt */
	brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
	if (bus->clkstate != CLK_AVAIL)
		goto exit;

	/* Force clocks on backplane to be sure F2 interrupt propagates */
	saveclk = brcmf_sdio_regrb(bus->sdiodev,
				   SBSDIO_FUNC1_CHIPCLKCSR, &err);
	if (!err) {
		brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
				 (saveclk | SBSDIO_FORCE_HT), &err);
	}
	if (err) {
		brcmf_err("Failed to force clock for F2: err %d\n", err);
		goto exit;
	}

	/* Enable function 2 (frame transfers) */
	w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
		  offsetof(struct sdpcmd_regs, tosbmailboxdata));
	enable = (SDIO_FUNC_ENABLE_1 | SDIO_FUNC_ENABLE_2);

	brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);

	timeout = jiffies + msecs_to_jiffies(BRCMF_WAIT_F2RDY);
	ready = 0;
	while (enable != ready) {
		ready = brcmf_sdio_regrb(bus->sdiodev,
					 SDIO_CCCR_IORx, NULL);
		if (time_after(jiffies, timeout))
			break;
		else if (time_after(jiffies, timeout - BRCMF_WAIT_F2RDY + 50))
			/* prevent busy waiting if it takes too long */
			msleep_interruptible(20);
	}

	brcmf_dbg(INFO, "enable 0x%02x, ready 0x%02x\n", enable, ready);

	/* If F2 successfully enabled, set core and enable interrupts */
	if (ready == enable) {
		/* Set up the interrupt mask and enable interrupts */
		bus->hostintmask = HOSTINTMASK;
		w_sdreg32(bus, bus->hostintmask,
			  offsetof(struct sdpcmd_regs, hostintmask));

		brcmf_sdio_regwb(bus->sdiodev, SBSDIO_WATERMARK, 8, &err);
	} else {
		/* Disable F2 again */
		enable = SDIO_FUNC_ENABLE_1;
		brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
		ret = -ENODEV;
	}

	/* Restore previous clock setting */
	brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, saveclk, &err);

	if (ret == 0) {
		ret = brcmf_sdio_intr_register(bus->sdiodev);
		if (ret != 0)
			brcmf_err("intr register failed:%d\n", ret);
	}

	/* If we didn't come up, turn off backplane clock */
	if (bus_if->state != BRCMF_BUS_DATA)
		brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);

exit:
	sdio_release_host(bus->sdiodev->func[1]);

	return ret;
}

void brcmf_sdbrcm_isr(void *arg)
{
	struct brcmf_sdio *bus = (struct brcmf_sdio *) arg;

	brcmf_dbg(TRACE, "Enter\n");

	if (!bus) {
		brcmf_err("bus is null pointer, exiting\n");
		return;
	}

	if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) {
		brcmf_err("bus is down. we have nothing to do\n");
		return;
	}
	/* Count the interrupt call */
	bus->sdcnt.intrcount++;
	if (in_interrupt())
		atomic_set(&bus->ipend, 1);
	else
		if (brcmf_sdio_intr_rstatus(bus)) {
			brcmf_err("failed backplane access\n");
			bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
		}

	/* Disable additional interrupts (is this needed now)? */
	if (!bus->intr)
		brcmf_err("isr w/o interrupt configured!\n");

	brcmf_sdbrcm_adddpctsk(bus);
	queue_work(bus->brcmf_wq, &bus->datawork);
}

static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus)
{
#ifdef DEBUG
	struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev);
#endif	/* DEBUG */
	unsigned long flags;

	brcmf_dbg(TIMER, "Enter\n");

	/* Poll period: check device if appropriate. */
	if (bus->poll && (++bus->polltick >= bus->pollrate)) {
		u32 intstatus = 0;

		/* Reset poll tick */
		bus->polltick = 0;

		/* Check device if no interrupts */
		if (!bus->intr ||
		    (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {

			spin_lock_irqsave(&bus->dpc_tl_lock, flags);
			if (list_empty(&bus->dpc_tsklst)) {
				u8 devpend;
				spin_unlock_irqrestore(&bus->dpc_tl_lock,
						       flags);
				sdio_claim_host(bus->sdiodev->func[1]);
				devpend = brcmf_sdio_regrb(bus->sdiodev,
							   SDIO_CCCR_INTx,
							   NULL);
				sdio_release_host(bus->sdiodev->func[1]);
				intstatus =
				    devpend & (INTR_STATUS_FUNC1 |
					       INTR_STATUS_FUNC2);
			} else {
				spin_unlock_irqrestore(&bus->dpc_tl_lock,
						       flags);
			}

			/* If there is something, make like the ISR and
				 schedule the DPC */
			if (intstatus) {
				bus->sdcnt.pollcnt++;
				atomic_set(&bus->ipend, 1);

				brcmf_sdbrcm_adddpctsk(bus);
				queue_work(bus->brcmf_wq, &bus->datawork);
			}
		}

		/* Update interrupt tracking */
		bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
	}
#ifdef DEBUG
	/* Poll for console output periodically */
	if (bus_if && bus_if->state == BRCMF_BUS_DATA &&
	    bus->console_interval != 0) {
		bus->console.count += BRCMF_WD_POLL_MS;
		if (bus->console.count >= bus->console_interval) {
			bus->console.count -= bus->console_interval;
			sdio_claim_host(bus->sdiodev->func[1]);
			/* Make sure backplane clock is on */
			brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
			if (brcmf_sdbrcm_readconsole(bus) < 0)
				/* stop on error */
				bus->console_interval = 0;
			sdio_release_host(bus->sdiodev->func[1]);
		}
	}
#endif				/* DEBUG */

	/* On idle timeout clear activity flag and/or turn off clock */
	if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
		if (++bus->idlecount >= bus->idletime) {
			bus->idlecount = 0;
			if (bus->activity) {
				bus->activity = false;
				brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
			} else {
				sdio_claim_host(bus->sdiodev->func[1]);
				brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
				sdio_release_host(bus->sdiodev->func[1]);
			}
		}
	}

	return (atomic_read(&bus->ipend) > 0);
}

static bool brcmf_sdbrcm_chipmatch(u16 chipid)
{
	if (chipid == BCM43241_CHIP_ID)
		return true;
	if (chipid == BCM4329_CHIP_ID)
		return true;
	if (chipid == BCM4330_CHIP_ID)
		return true;
	if (chipid == BCM4334_CHIP_ID)
		return true;
	return false;
}

static void brcmf_sdio_dataworker(struct work_struct *work)
{
	struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
					      datawork);
	struct list_head *cur_hd, *tmp_hd;
	unsigned long flags;

	spin_lock_irqsave(&bus->dpc_tl_lock, flags);
	list_for_each_safe(cur_hd, tmp_hd, &bus->dpc_tsklst) {
		spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);

		brcmf_sdbrcm_dpc(bus);

		spin_lock_irqsave(&bus->dpc_tl_lock, flags);
		list_del(cur_hd);
		kfree(cur_hd);
	}
	spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
}

static void brcmf_sdbrcm_release_malloc(struct brcmf_sdio *bus)
{
	brcmf_dbg(TRACE, "Enter\n");

	kfree(bus->rxbuf);
	bus->rxctl = bus->rxbuf = NULL;
	bus->rxlen = 0;

	kfree(bus->databuf);
	bus->databuf = NULL;
}

static bool brcmf_sdbrcm_probe_malloc(struct brcmf_sdio *bus)
{
	brcmf_dbg(TRACE, "Enter\n");

	if (bus->sdiodev->bus_if->maxctl) {
		bus->rxblen =
		    roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
			    ALIGNMENT) + BRCMF_SDALIGN;
		bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
		if (!(bus->rxbuf))
			goto fail;
	}

	/* Allocate buffer to receive glomed packet */
	bus->databuf = kmalloc(MAX_DATA_BUF, GFP_ATOMIC);
	if (!(bus->databuf)) {
		/* release rxbuf which was already located as above */
		if (!bus->rxblen)
			kfree(bus->rxbuf);
		goto fail;
	}

	/* Align the buffer */
	if ((unsigned long)bus->databuf % BRCMF_SDALIGN)
		bus->dataptr = bus->databuf + (BRCMF_SDALIGN -
			       ((unsigned long)bus->databuf % BRCMF_SDALIGN));
	else
		bus->dataptr = bus->databuf;

	return true;

fail:
	return false;
}

static bool
brcmf_sdbrcm_probe_attach(struct brcmf_sdio *bus, u32 regsva)
{
	u8 clkctl = 0;
	int err = 0;
	int reg_addr;
	u32 reg_val;
	u8 idx;

	bus->alp_only = true;

	sdio_claim_host(bus->sdiodev->func[1]);

	pr_debug("F1 signature read @0x18000000=0x%4x\n",
		 brcmf_sdio_regrl(bus->sdiodev, SI_ENUM_BASE, NULL));

	/*
	 * Force PLL off until brcmf_sdio_chip_attach()
	 * programs PLL control regs
	 */

	brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
			 BRCMF_INIT_CLKCTL1, &err);
	if (!err)
		clkctl = brcmf_sdio_regrb(bus->sdiodev,
					  SBSDIO_FUNC1_CHIPCLKCSR, &err);

	if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
		brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
			  err, BRCMF_INIT_CLKCTL1, clkctl);
		goto fail;
	}

	if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci, regsva)) {
		brcmf_err("brcmf_sdio_chip_attach failed!\n");
		goto fail;
	}

	if (!brcmf_sdbrcm_chipmatch((u16) bus->ci->chip)) {
		brcmf_err("unsupported chip: 0x%04x\n", bus->ci->chip);
		goto fail;
	}

	brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci,
					  SDIO_DRIVE_STRENGTH);

	/* Get info on the SOCRAM cores... */
	bus->ramsize = bus->ci->ramsize;
	if (!(bus->ramsize)) {
		brcmf_err("failed to find SOCRAM memory!\n");
		goto fail;
	}

	/* Set core control so an SDIO reset does a backplane reset */
	idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
	reg_addr = bus->ci->c_inf[idx].base +
		   offsetof(struct sdpcmd_regs, corecontrol);
	reg_val = brcmf_sdio_regrl(bus->sdiodev, reg_addr, NULL);
	brcmf_sdio_regwl(bus->sdiodev, reg_addr, reg_val | CC_BPRESEN, NULL);

	sdio_release_host(bus->sdiodev->func[1]);

	brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);

	/* Locate an appropriately-aligned portion of hdrbuf */
	bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
				    BRCMF_SDALIGN);

	/* Set the poll and/or interrupt flags */
	bus->intr = true;
	bus->poll = false;
	if (bus->poll)
		bus->pollrate = 1;

	return true;

fail:
	sdio_release_host(bus->sdiodev->func[1]);
	return false;
}

static bool brcmf_sdbrcm_probe_init(struct brcmf_sdio *bus)
{
	brcmf_dbg(TRACE, "Enter\n");

	sdio_claim_host(bus->sdiodev->func[1]);

	/* Disable F2 to clear any intermediate frame state on the dongle */
	brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx,
			 SDIO_FUNC_ENABLE_1, NULL);

	bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
	bus->rxflow = false;

	/* Done with backplane-dependent accesses, can drop clock... */
	brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);

	sdio_release_host(bus->sdiodev->func[1]);

	/* ...and initialize clock/power states */
	bus->clkstate = CLK_SDONLY;
	bus->idletime = BRCMF_IDLE_INTERVAL;
	bus->idleclock = BRCMF_IDLE_ACTIVE;

	/* Query the F2 block size, set roundup accordingly */
	bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
	bus->roundup = min(max_roundup, bus->blocksize);

	/* bus module does not support packet chaining */
	bus->use_rxchain = false;
	bus->sd_rxchain = false;

	return true;
}

static int
brcmf_sdbrcm_watchdog_thread(void *data)
{
	struct brcmf_sdio *bus = (struct brcmf_sdio *)data;

	allow_signal(SIGTERM);
	/* Run until signal received */
	while (1) {
		if (kthread_should_stop())
			break;
		if (!wait_for_completion_interruptible(&bus->watchdog_wait)) {
			brcmf_sdbrcm_bus_watchdog(bus);
			/* Count the tick for reference */
			bus->sdcnt.tickcnt++;
		} else
			break;
	}
	return 0;
}

static void
brcmf_sdbrcm_watchdog(unsigned long data)
{
	struct brcmf_sdio *bus = (struct brcmf_sdio *)data;

	if (bus->watchdog_tsk) {
		complete(&bus->watchdog_wait);
		/* Reschedule the watchdog */
		if (bus->wd_timer_valid)
			mod_timer(&bus->timer,
				  jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
	}
}

static void brcmf_sdbrcm_release_dongle(struct brcmf_sdio *bus)
{
	brcmf_dbg(TRACE, "Enter\n");

	if (bus->ci) {
		sdio_claim_host(bus->sdiodev->func[1]);
		brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
		brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
		sdio_release_host(bus->sdiodev->func[1]);
		brcmf_sdio_chip_detach(&bus->ci);
		if (bus->vars && bus->varsz)
			kfree(bus->vars);
		bus->vars = NULL;
	}

	brcmf_dbg(TRACE, "Disconnected\n");
}

/* Detach and free everything */
static void brcmf_sdbrcm_release(struct brcmf_sdio *bus)
{
	brcmf_dbg(TRACE, "Enter\n");

	if (bus) {
		/* De-register interrupt handler */
		brcmf_sdio_intr_unregister(bus->sdiodev);

		cancel_work_sync(&bus->datawork);
		if (bus->brcmf_wq)
			destroy_workqueue(bus->brcmf_wq);

		if (bus->sdiodev->bus_if->drvr) {
			brcmf_detach(bus->sdiodev->dev);
			brcmf_sdbrcm_release_dongle(bus);
		}

		brcmf_sdbrcm_release_malloc(bus);

		kfree(bus);
	}

	brcmf_dbg(TRACE, "Disconnected\n");
}

static struct brcmf_bus_ops brcmf_sdio_bus_ops = {
	.stop = brcmf_sdbrcm_bus_stop,
	.init = brcmf_sdbrcm_bus_init,
	.txdata = brcmf_sdbrcm_bus_txdata,
	.txctl = brcmf_sdbrcm_bus_txctl,
	.rxctl = brcmf_sdbrcm_bus_rxctl,
};

void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev)
{
	int ret;
	struct brcmf_sdio *bus;
	struct brcmf_bus_dcmd *dlst;
	u32 dngl_txglom;
	u32 dngl_txglomalign;
	u8 idx;

	brcmf_dbg(TRACE, "Enter\n");

	/* We make an assumption about address window mappings:
	 * regsva == SI_ENUM_BASE*/

	/* Allocate private bus interface state */
	bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
	if (!bus)
		goto fail;

	bus->sdiodev = sdiodev;
	sdiodev->bus = bus;
	skb_queue_head_init(&bus->glom);
	bus->txbound = BRCMF_TXBOUND;
	bus->rxbound = BRCMF_RXBOUND;
	bus->txminmax = BRCMF_TXMINMAX;
	bus->tx_seq = SDPCM_SEQUENCE_WRAP - 1;

	INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
	bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");
	if (bus->brcmf_wq == NULL) {
		brcmf_err("insufficient memory to create txworkqueue\n");
		goto fail;
	}

	/* attempt to attach to the dongle */
	if (!(brcmf_sdbrcm_probe_attach(bus, regsva))) {
		brcmf_err("brcmf_sdbrcm_probe_attach failed\n");
		goto fail;
	}

	spin_lock_init(&bus->rxctl_lock);
	spin_lock_init(&bus->txqlock);
	init_waitqueue_head(&bus->ctrl_wait);
	init_waitqueue_head(&bus->dcmd_resp_wait);

	/* Set up the watchdog timer */
	init_timer(&bus->timer);
	bus->timer.data = (unsigned long)bus;
	bus->timer.function = brcmf_sdbrcm_watchdog;

	/* Initialize watchdog thread */
	init_completion(&bus->watchdog_wait);
	bus->watchdog_tsk = kthread_run(brcmf_sdbrcm_watchdog_thread,
					bus, "brcmf_watchdog");
	if (IS_ERR(bus->watchdog_tsk)) {
		pr_warn("brcmf_watchdog thread failed to start\n");
		bus->watchdog_tsk = NULL;
	}
	/* Initialize DPC thread */
	INIT_LIST_HEAD(&bus->dpc_tsklst);
	spin_lock_init(&bus->dpc_tl_lock);

	/* Assign bus interface call back */
	bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
	bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops;
	bus->sdiodev->bus_if->chip = bus->ci->chip;
	bus->sdiodev->bus_if->chiprev = bus->ci->chiprev;

	/* Attach to the brcmf/OS/network interface */
	ret = brcmf_attach(SDPCM_RESERVE, bus->sdiodev->dev);
	if (ret != 0) {
		brcmf_err("brcmf_attach failed\n");
		goto fail;
	}

	/* Allocate buffers */
	if (!(brcmf_sdbrcm_probe_malloc(bus))) {
		brcmf_err("brcmf_sdbrcm_probe_malloc failed\n");
		goto fail;
	}

	if (!(brcmf_sdbrcm_probe_init(bus))) {
		brcmf_err("brcmf_sdbrcm_probe_init failed\n");
		goto fail;
	}

	brcmf_sdio_debugfs_create(bus);
	brcmf_dbg(INFO, "completed!!\n");

	/* sdio bus core specific dcmd */
	idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
	dlst = kzalloc(sizeof(struct brcmf_bus_dcmd), GFP_KERNEL);
	if (dlst) {
		if (bus->ci->c_inf[idx].rev < 12) {
			/* for sdio core rev < 12, disable txgloming */
			dngl_txglom = 0;
			dlst->name = "bus:txglom";
			dlst->param = (char *)&dngl_txglom;
			dlst->param_len = sizeof(u32);
		} else {
			/* otherwise, set txglomalign */
			dngl_txglomalign = bus->sdiodev->bus_if->align;
			dlst->name = "bus:txglomalign";
			dlst->param = (char *)&dngl_txglomalign;
			dlst->param_len = sizeof(u32);
		}
		list_add(&dlst->list, &bus->sdiodev->bus_if->dcmd_list);
	}

	/* if firmware path present try to download and bring up bus */
	ret = brcmf_bus_start(bus->sdiodev->dev);
	if (ret != 0) {
		brcmf_err("dongle is not responding\n");
		goto fail;
	}

	return bus;

fail:
	brcmf_sdbrcm_release(bus);
	return NULL;
}

void brcmf_sdbrcm_disconnect(void *ptr)
{
	struct brcmf_sdio *bus = (struct brcmf_sdio *)ptr;

	brcmf_dbg(TRACE, "Enter\n");

	if (bus)
		brcmf_sdbrcm_release(bus);

	brcmf_dbg(TRACE, "Disconnected\n");
}

void
brcmf_sdbrcm_wd_timer(struct brcmf_sdio *bus, uint wdtick)
{
	/* Totally stop the timer */
	if (!wdtick && bus->wd_timer_valid) {
		del_timer_sync(&bus->timer);
		bus->wd_timer_valid = false;
		bus->save_ms = wdtick;
		return;
	}

	/* don't start the wd until fw is loaded */
	if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN)
		return;

	if (wdtick) {
		if (bus->save_ms != BRCMF_WD_POLL_MS) {
			if (bus->wd_timer_valid)
				/* Stop timer and restart at new value */
				del_timer_sync(&bus->timer);

			/* Create timer again when watchdog period is
			   dynamically changed or in the first instance
			 */
			bus->timer.expires =
				jiffies + BRCMF_WD_POLL_MS * HZ / 1000;
			add_timer(&bus->timer);

		} else {
			/* Re arm the timer, at last watchdog period */
			mod_timer(&bus->timer,
				jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
		}

		bus->wd_timer_valid = true;
		bus->save_ms = wdtick;
	}
}