aboutsummaryrefslogtreecommitdiff
path: root/sound/pci/ac97/ac97_codec.c
blob: 78288dbfc17a039cc4b9b417bf6ae56bbf2f1419 (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
/*
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *  Universal interface for Audio Codec '97
 *
 *  For more details look to AC '97 component specification revision 2.2
 *  by Intel Corporation (http://developer.intel.com).
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/tlv.h>
#include <sound/ac97_codec.h>
#include <sound/asoundef.h>
#include <sound/initval.h>
#include "ac97_id.h"

#include "ac97_patch.c"

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Universal interface for Audio Codec '97");
MODULE_LICENSE("GPL");

static int enable_loopback;

module_param(enable_loopback, bool, 0444);
MODULE_PARM_DESC(enable_loopback, "Enable AC97 ADC/DAC Loopback Control");

#ifdef CONFIG_SND_AC97_POWER_SAVE
static int power_save = CONFIG_SND_AC97_POWER_SAVE_DEFAULT;
module_param(power_save, int, 0644);
MODULE_PARM_DESC(power_save, "Automatic power-saving timeout "
		 "(in second, 0 = disable).");
#endif
/*

 */

struct ac97_codec_id {
	unsigned int id;
	unsigned int mask;
	const char *name;
	int (*patch)(struct snd_ac97 *ac97);
	int (*mpatch)(struct snd_ac97 *ac97);
	unsigned int flags;
};

static const struct ac97_codec_id snd_ac97_codec_id_vendors[] = {
{ 0x41445300, 0xffffff00, "Analog Devices",	NULL,	NULL },
{ 0x414b4d00, 0xffffff00, "Asahi Kasei",	NULL,	NULL },
{ 0x414c4300, 0xffffff00, "Realtek",		NULL,	NULL },
{ 0x414c4700, 0xffffff00, "Realtek",		NULL,	NULL },
{ 0x434d4900, 0xffffff00, "C-Media Electronics", NULL,	NULL },
{ 0x43525900, 0xffffff00, "Cirrus Logic",	NULL,	NULL },
{ 0x43585400, 0xffffff00, "Conexant",           NULL,	NULL },
{ 0x44543000, 0xffffff00, "Diamond Technology", NULL,	NULL },
{ 0x454d4300, 0xffffff00, "eMicro",		NULL,	NULL },
{ 0x45838300, 0xffffff00, "ESS Technology",	NULL,	NULL },
{ 0x48525300, 0xffffff00, "Intersil",		NULL,	NULL },
{ 0x49434500, 0xffffff00, "ICEnsemble",		NULL,	NULL },
{ 0x49544500, 0xffffff00, "ITE Tech.Inc",	NULL,	NULL },
{ 0x4e534300, 0xffffff00, "National Semiconductor", NULL, NULL },
{ 0x50534300, 0xffffff00, "Philips",		NULL,	NULL },
{ 0x53494c00, 0xffffff00, "Silicon Laboratory",	NULL,	NULL },
{ 0x54524100, 0xffffff00, "TriTech",		NULL,	NULL },
{ 0x54584e00, 0xffffff00, "Texas Instruments",	NULL,	NULL },
{ 0x56494100, 0xffffff00, "VIA Technologies",   NULL,	NULL },
{ 0x57454300, 0xffffff00, "Winbond",		NULL,	NULL },
{ 0x574d4c00, 0xffffff00, "Wolfson",		NULL,	NULL },
{ 0x594d4800, 0xffffff00, "Yamaha",		NULL,	NULL },
{ 0x83847600, 0xffffff00, "SigmaTel",		NULL,	NULL },
{ 0,	      0, 	  NULL,			NULL,	NULL }
};

static const struct ac97_codec_id snd_ac97_codec_ids[] = {
{ 0x41445303, 0xffffffff, "AD1819",		patch_ad1819,	NULL },
{ 0x41445340, 0xffffffff, "AD1881",		patch_ad1881,	NULL },
{ 0x41445348, 0xffffffff, "AD1881A",		patch_ad1881,	NULL },
{ 0x41445360, 0xffffffff, "AD1885",		patch_ad1885,	NULL },
{ 0x41445361, 0xffffffff, "AD1886",		patch_ad1886,	NULL },
{ 0x41445362, 0xffffffff, "AD1887",		patch_ad1881,	NULL },
{ 0x41445363, 0xffffffff, "AD1886A",		patch_ad1881,	NULL },
{ 0x41445368, 0xffffffff, "AD1888",		patch_ad1888,	NULL },
{ 0x41445370, 0xffffffff, "AD1980",		patch_ad1980,	NULL },
{ 0x41445372, 0xffffffff, "AD1981A",		patch_ad1981a,	NULL },
{ 0x41445374, 0xffffffff, "AD1981B",		patch_ad1981b,	NULL },
{ 0x41445375, 0xffffffff, "AD1985",		patch_ad1985,	NULL },
{ 0x41445378, 0xffffffff, "AD1986",		patch_ad1986,	NULL },
{ 0x414b4d00, 0xffffffff, "AK4540",		NULL,		NULL },
{ 0x414b4d01, 0xffffffff, "AK4542",		NULL,		NULL },
{ 0x414b4d02, 0xffffffff, "AK4543",		NULL,		NULL },
{ 0x414b4d06, 0xffffffff, "AK4544A",		NULL,		NULL },
{ 0x414b4d07, 0xffffffff, "AK4545",		NULL,		NULL },
{ 0x414c4300, 0xffffff00, "ALC100,100P", 	NULL,		NULL },
{ 0x414c4710, 0xfffffff0, "ALC200,200P",	NULL,		NULL },
{ 0x414c4721, 0xffffffff, "ALC650D",		NULL,	NULL }, /* already patched */
{ 0x414c4722, 0xffffffff, "ALC650E",		NULL,	NULL }, /* already patched */
{ 0x414c4723, 0xffffffff, "ALC650F",		NULL,	NULL }, /* already patched */
{ 0x414c4720, 0xfffffff0, "ALC650",		patch_alc650,	NULL },
{ 0x414c4730, 0xffffffff, "ALC101",		NULL,		NULL },
{ 0x414c4740, 0xfffffff0, "ALC202",		NULL,		NULL },
{ 0x414c4750, 0xfffffff0, "ALC250",		NULL,		NULL },
{ 0x414c4760, 0xfffffff0, "ALC655",		patch_alc655,	NULL },
{ 0x414c4770, 0xfffffff0, "ALC203",		patch_alc203,	NULL },
{ 0x414c4781, 0xffffffff, "ALC658D",		NULL,	NULL }, /* already patched */
{ 0x414c4780, 0xfffffff0, "ALC658",		patch_alc655,	NULL },
{ 0x414c4790, 0xfffffff0, "ALC850",		patch_alc850,	NULL },
{ 0x434d4941, 0xffffffff, "CMI9738",		patch_cm9738,	NULL },
{ 0x434d4961, 0xffffffff, "CMI9739",		patch_cm9739,	NULL },
{ 0x434d4969, 0xffffffff, "CMI9780",		patch_cm9780,	NULL },
{ 0x434d4978, 0xffffffff, "CMI9761A",		patch_cm9761,	NULL },
{ 0x434d4982, 0xffffffff, "CMI9761B",		patch_cm9761,	NULL },
{ 0x434d4983, 0xffffffff, "CMI9761A+",		patch_cm9761,	NULL },
{ 0x43525900, 0xfffffff8, "CS4297",		NULL,		NULL },
{ 0x43525910, 0xfffffff8, "CS4297A",		patch_cirrus_spdif,	NULL },
{ 0x43525920, 0xfffffff8, "CS4298",		patch_cirrus_spdif,		NULL },
{ 0x43525928, 0xfffffff8, "CS4294",		NULL,		NULL },
{ 0x43525930, 0xfffffff8, "CS4299",		patch_cirrus_cs4299,	NULL },
{ 0x43525948, 0xfffffff8, "CS4201",		NULL,		NULL },
{ 0x43525958, 0xfffffff8, "CS4205",		patch_cirrus_spdif,	NULL },
{ 0x43525960, 0xfffffff8, "CS4291",		NULL,		NULL },
{ 0x43525970, 0xfffffff8, "CS4202",		NULL,		NULL },
{ 0x43585421, 0xffffffff, "HSD11246",		NULL,		NULL },	// SmartMC II
{ 0x43585428, 0xfffffff8, "Cx20468",		patch_conexant,	NULL }, // SmartAMC fixme: the mask might be different
{ 0x43585430, 0xffffffff, "Cx20468-31",		patch_conexant, NULL },
{ 0x43585431, 0xffffffff, "Cx20551",           patch_cx20551,  NULL },
{ 0x44543031, 0xfffffff0, "DT0398",		NULL,		NULL },
{ 0x454d4328, 0xffffffff, "EM28028",		NULL,		NULL },  // same as TR28028?
{ 0x45838308, 0xffffffff, "ESS1988",		NULL,		NULL },
{ 0x48525300, 0xffffff00, "HMP9701",		NULL,		NULL },
{ 0x49434501, 0xffffffff, "ICE1230",		NULL,		NULL },
{ 0x49434511, 0xffffffff, "ICE1232",		NULL,		NULL }, // alias VIA VT1611A?
{ 0x49434514, 0xffffffff, "ICE1232A",		NULL,		NULL },
{ 0x49434551, 0xffffffff, "VT1616", 		patch_vt1616,	NULL }, 
{ 0x49434552, 0xffffffff, "VT1616i",		patch_vt1616,	NULL }, // VT1616 compatible (chipset integrated)
{ 0x49544520, 0xffffffff, "IT2226E",		NULL,		NULL },
{ 0x49544561, 0xffffffff, "IT2646E",		patch_it2646,	NULL },
{ 0x4e534300, 0xffffffff, "LM4540,43,45,46,48",	NULL,		NULL }, // only guess --jk
{ 0x4e534331, 0xffffffff, "LM4549",		NULL,		NULL },
{ 0x4e534350, 0xffffffff, "LM4550",		patch_lm4550,  	NULL }, // volume wrap fix 
{ 0x50534304, 0xffffffff, "UCB1400",		patch_ucb1400,	NULL },
{ 0x53494c20, 0xffffffe0, "Si3036,8",		mpatch_si3036,	mpatch_si3036, AC97_MODEM_PATCH },
{ 0x54524102, 0xffffffff, "TR28022",		NULL,		NULL },
{ 0x54524103, 0xffffffff, "TR28023",		NULL,		NULL },
{ 0x54524106, 0xffffffff, "TR28026",		NULL,		NULL },
{ 0x54524108, 0xffffffff, "TR28028",		patch_tritech_tr28028,	NULL }, // added by xin jin [07/09/99]
{ 0x54524123, 0xffffffff, "TR28602",		NULL,		NULL }, // only guess --jk [TR28023 = eMicro EM28023 (new CT1297)]
{ 0x54584e20, 0xffffffff, "TLC320AD9xC",	NULL,		NULL },
{ 0x56494161, 0xffffffff, "VIA1612A",		NULL,		NULL }, // modified ICE1232 with S/PDIF
{ 0x56494170, 0xffffffff, "VIA1617A",		patch_vt1617a,	NULL }, // modified VT1616 with S/PDIF
{ 0x56494182, 0xffffffff, "VIA1618",		patch_vt1618,   NULL },
{ 0x57454301, 0xffffffff, "W83971D",		NULL,		NULL },
{ 0x574d4c00, 0xffffffff, "WM9701,WM9701A",	NULL,		NULL },
{ 0x574d4C03, 0xffffffff, "WM9703,WM9707,WM9708,WM9717", patch_wolfson03, NULL},
{ 0x574d4C04, 0xffffffff, "WM9704M,WM9704Q",	patch_wolfson04, NULL},
{ 0x574d4C05, 0xffffffff, "WM9705,WM9710",	patch_wolfson05, NULL},
{ 0x574d4C09, 0xffffffff, "WM9709",		NULL,		NULL},
{ 0x574d4C12, 0xffffffff, "WM9711,WM9712,WM9715",	patch_wolfson11, NULL},
{ 0x574d4c13, 0xffffffff, "WM9713,WM9714",	patch_wolfson13, NULL, AC97_DEFAULT_POWER_OFF},
{ 0x594d4800, 0xffffffff, "YMF743",		patch_yamaha_ymf743,	NULL },
{ 0x594d4802, 0xffffffff, "YMF752",		NULL,		NULL },
{ 0x594d4803, 0xffffffff, "YMF753",		patch_yamaha_ymf753,	NULL },
{ 0x83847600, 0xffffffff, "STAC9700,83,84",	patch_sigmatel_stac9700,	NULL },
{ 0x83847604, 0xffffffff, "STAC9701,3,4,5",	NULL,		NULL },
{ 0x83847605, 0xffffffff, "STAC9704",		NULL,		NULL },
{ 0x83847608, 0xffffffff, "STAC9708,11",	patch_sigmatel_stac9708,	NULL },
{ 0x83847609, 0xffffffff, "STAC9721,23",	patch_sigmatel_stac9721,	NULL },
{ 0x83847644, 0xffffffff, "STAC9744",		patch_sigmatel_stac9744,	NULL },
{ 0x83847650, 0xffffffff, "STAC9750,51",	NULL,		NULL },	// patch?
{ 0x83847652, 0xffffffff, "STAC9752,53",	NULL,		NULL }, // patch?
{ 0x83847656, 0xffffffff, "STAC9756,57",	patch_sigmatel_stac9756,	NULL },
{ 0x83847658, 0xffffffff, "STAC9758,59",	patch_sigmatel_stac9758,	NULL },
{ 0x83847666, 0xffffffff, "STAC9766,67",	NULL,		NULL }, // patch?
{ 0, 	      0,	  NULL,			NULL,		NULL }
};


static void update_power_regs(struct snd_ac97 *ac97);
#ifdef CONFIG_SND_AC97_POWER_SAVE
#define ac97_is_power_save_mode(ac97) \
	((ac97->scaps & AC97_SCAP_POWER_SAVE) && power_save)
#else
#define ac97_is_power_save_mode(ac97) 0
#endif


/*
 *  I/O routines
 */

static int snd_ac97_valid_reg(struct snd_ac97 *ac97, unsigned short reg)
{
	/* filter some registers for buggy codecs */
	switch (ac97->id) {
	case AC97_ID_AK4540:
	case AC97_ID_AK4542:
		if (reg <= 0x1c || reg == 0x20 || reg == 0x26 || reg >= 0x7c)
			return 1;
		return 0;
	case AC97_ID_AD1819:	/* AD1819 */
	case AC97_ID_AD1881:	/* AD1881 */
	case AC97_ID_AD1881A:	/* AD1881A */
		if (reg >= 0x3a && reg <= 0x6e)	/* 0x59 */
			return 0;
		return 1;
	case AC97_ID_AD1885:	/* AD1885 */
	case AC97_ID_AD1886:	/* AD1886 */
	case AC97_ID_AD1886A:	/* AD1886A - !!verify!! --jk */
	case AC97_ID_AD1887:	/* AD1887 - !!verify!! --jk */
		if (reg == 0x5a)
			return 1;
		if (reg >= 0x3c && reg <= 0x6e)	/* 0x59 */
			return 0;
		return 1;
	case AC97_ID_STAC9700:
	case AC97_ID_STAC9704:
	case AC97_ID_STAC9705:
	case AC97_ID_STAC9708:
	case AC97_ID_STAC9721:
	case AC97_ID_STAC9744:
	case AC97_ID_STAC9756:
		if (reg <= 0x3a || reg >= 0x5a)
			return 1;
		return 0;
	}
	return 1;
}

/**
 * snd_ac97_write - write a value on the given register
 * @ac97: the ac97 instance
 * @reg: the register to change
 * @value: the value to set
 *
 * Writes a value on the given register.  This will invoke the write
 * callback directly after the register check.
 * This function doesn't change the register cache unlike
 * #snd_ca97_write_cache(), so use this only when you don't want to
 * reflect the change to the suspend/resume state.
 */
void snd_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short value)
{
	if (!snd_ac97_valid_reg(ac97, reg))
		return;
	if ((ac97->id & 0xffffff00) == AC97_ID_ALC100) {
		/* Fix H/W bug of ALC100/100P */
		if (reg == AC97_MASTER || reg == AC97_HEADPHONE)
			ac97->bus->ops->write(ac97, AC97_RESET, 0);	/* reset audio codec */
	}
	ac97->bus->ops->write(ac97, reg, value);
}

EXPORT_SYMBOL(snd_ac97_write);

/**
 * snd_ac97_read - read a value from the given register
 * 
 * @ac97: the ac97 instance
 * @reg: the register to read
 *
 * Reads a value from the given register.  This will invoke the read
 * callback directly after the register check.
 *
 * Returns the read value.
 */
unsigned short snd_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
{
	if (!snd_ac97_valid_reg(ac97, reg))
		return 0;
	return ac97->bus->ops->read(ac97, reg);
}

/* read a register - return the cached value if already read */
static inline unsigned short snd_ac97_read_cache(struct snd_ac97 *ac97, unsigned short reg)
{
	if (! test_bit(reg, ac97->reg_accessed)) {
		ac97->regs[reg] = ac97->bus->ops->read(ac97, reg);
		// set_bit(reg, ac97->reg_accessed);
	}
	return ac97->regs[reg];
}

EXPORT_SYMBOL(snd_ac97_read);

/**
 * snd_ac97_write_cache - write a value on the given register and update the cache
 * @ac97: the ac97 instance
 * @reg: the register to change
 * @value: the value to set
 *
 * Writes a value on the given register and updates the register
 * cache.  The cached values are used for the cached-read and the
 * suspend/resume.
 */
void snd_ac97_write_cache(struct snd_ac97 *ac97, unsigned short reg, unsigned short value)
{
	if (!snd_ac97_valid_reg(ac97, reg))
		return;
	mutex_lock(&ac97->reg_mutex);
	ac97->regs[reg] = value;
	ac97->bus->ops->write(ac97, reg, value);
	set_bit(reg, ac97->reg_accessed);
	mutex_unlock(&ac97->reg_mutex);
}

EXPORT_SYMBOL(snd_ac97_write_cache);

/**
 * snd_ac97_update - update the value on the given register
 * @ac97: the ac97 instance
 * @reg: the register to change
 * @value: the value to set
 *
 * Compares the value with the register cache and updates the value
 * only when the value is changed.
 *
 * Returns 1 if the value is changed, 0 if no change, or a negative
 * code on failure.
 */
int snd_ac97_update(struct snd_ac97 *ac97, unsigned short reg, unsigned short value)
{
	int change;

	if (!snd_ac97_valid_reg(ac97, reg))
		return -EINVAL;
	mutex_lock(&ac97->reg_mutex);
	change = ac97->regs[reg] != value;
	if (change) {
		ac97->regs[reg] = value;
		ac97->bus->ops->write(ac97, reg, value);
	}
	set_bit(reg, ac97->reg_accessed);
	mutex_unlock(&ac97->reg_mutex);
	return change;
}

EXPORT_SYMBOL(snd_ac97_update);

/**
 * snd_ac97_update_bits - update the bits on the given register
 * @ac97: the ac97 instance
 * @reg: the register to change
 * @mask: the bit-mask to change
 * @value: the value to set
 *
 * Updates the masked-bits on the given register only when the value
 * is changed.
 *
 * Returns 1 if the bits are changed, 0 if no change, or a negative
 * code on failure.
 */
int snd_ac97_update_bits(struct snd_ac97 *ac97, unsigned short reg, unsigned short mask, unsigned short value)
{
	int change;

	if (!snd_ac97_valid_reg(ac97, reg))
		return -EINVAL;
	mutex_lock(&ac97->reg_mutex);
	change = snd_ac97_update_bits_nolock(ac97, reg, mask, value);
	mutex_unlock(&ac97->reg_mutex);
	return change;
}

EXPORT_SYMBOL(snd_ac97_update_bits);

/* no lock version - see snd_ac97_update_bits() */
int snd_ac97_update_bits_nolock(struct snd_ac97 *ac97, unsigned short reg,
				unsigned short mask, unsigned short value)
{
	int change;
	unsigned short old, new;

	old = snd_ac97_read_cache(ac97, reg);
	new = (old & ~mask) | (value & mask);
	change = old != new;
	if (change) {
		ac97->regs[reg] = new;
		ac97->bus->ops->write(ac97, reg, new);
	}
	set_bit(reg, ac97->reg_accessed);
	return change;
}

static int snd_ac97_ad18xx_update_pcm_bits(struct snd_ac97 *ac97, int codec, unsigned short mask, unsigned short value)
{
	int change;
	unsigned short old, new, cfg;

	mutex_lock(&ac97->page_mutex);
	old = ac97->spec.ad18xx.pcmreg[codec];
	new = (old & ~mask) | (value & mask);
	change = old != new;
	if (change) {
		mutex_lock(&ac97->reg_mutex);
		cfg = snd_ac97_read_cache(ac97, AC97_AD_SERIAL_CFG);
		ac97->spec.ad18xx.pcmreg[codec] = new;
		/* select single codec */
		ac97->bus->ops->write(ac97, AC97_AD_SERIAL_CFG,
				 (cfg & ~0x7000) |
				 ac97->spec.ad18xx.unchained[codec] | ac97->spec.ad18xx.chained[codec]);
		/* update PCM bits */
		ac97->bus->ops->write(ac97, AC97_PCM, new);
		/* select all codecs */
		ac97->bus->ops->write(ac97, AC97_AD_SERIAL_CFG,
				 cfg | 0x7000);
		mutex_unlock(&ac97->reg_mutex);
	}
	mutex_unlock(&ac97->page_mutex);
	return change;
}

/*
 * Controls
 */

static int snd_ac97_info_enum_double(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_info *uinfo)
{
	struct ac97_enum *e = (struct ac97_enum *)kcontrol->private_value;
	
	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
	uinfo->value.enumerated.items = e->mask;
	
	if (uinfo->value.enumerated.item > e->mask - 1)
		uinfo->value.enumerated.item = e->mask - 1;
	strcpy(uinfo->value.enumerated.name, e->texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_ac97_get_enum_double(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	struct ac97_enum *e = (struct ac97_enum *)kcontrol->private_value;
	unsigned short val, bitmask;
	
	for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
		;
	val = snd_ac97_read_cache(ac97, e->reg);
	ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
	if (e->shift_l != e->shift_r)
		ucontrol->value.enumerated.item[1] = (val >> e->shift_r) & (bitmask - 1);

	return 0;
}

static int snd_ac97_put_enum_double(struct snd_kcontrol *kcontrol,
				    struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	struct ac97_enum *e = (struct ac97_enum *)kcontrol->private_value;
	unsigned short val;
	unsigned short mask, bitmask;
	
	for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
		;
	if (ucontrol->value.enumerated.item[0] > e->mask - 1)
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
		if (ucontrol->value.enumerated.item[1] > e->mask - 1)
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}
	return snd_ac97_update_bits(ac97, e->reg, mask, val);
}

/* save/restore ac97 v2.3 paging */
static int snd_ac97_page_save(struct snd_ac97 *ac97, int reg, struct snd_kcontrol *kcontrol)
{
	int page_save = -1;
	if ((kcontrol->private_value & (1<<25)) &&
	    (ac97->ext_id & AC97_EI_REV_MASK) >= AC97_EI_REV_23 &&
	    (reg >= 0x60 && reg < 0x70)) {
		unsigned short page = (kcontrol->private_value >> 26) & 0x0f;
		mutex_lock(&ac97->page_mutex); /* lock paging */
		page_save = snd_ac97_read(ac97, AC97_INT_PAGING) & AC97_PAGE_MASK;
		snd_ac97_update_bits(ac97, AC97_INT_PAGING, AC97_PAGE_MASK, page);
	}
	return page_save;
}

static void snd_ac97_page_restore(struct snd_ac97 *ac97, int page_save)
{
	if (page_save >= 0) {
		snd_ac97_update_bits(ac97, AC97_INT_PAGING, AC97_PAGE_MASK, page_save);
		mutex_unlock(&ac97->page_mutex); /* unlock paging */
	}
}

/* volume and switch controls */
static int snd_ac97_info_volsw(struct snd_kcontrol *kcontrol,
			       struct snd_ctl_elem_info *uinfo)
{
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0x0f;
	int rshift = (kcontrol->private_value >> 12) & 0x0f;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_ac97_get_volsw(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0x0f;
	int rshift = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0x01;
	int page_save;

	page_save = snd_ac97_page_save(ac97, reg, kcontrol);
	ucontrol->value.integer.value[0] = (snd_ac97_read_cache(ac97, reg) >> shift) & mask;
	if (shift != rshift)
		ucontrol->value.integer.value[1] = (snd_ac97_read_cache(ac97, reg) >> rshift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
		if (shift != rshift)
			ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
	}
	snd_ac97_page_restore(ac97, page_save);
	return 0;
}

static int snd_ac97_put_volsw(struct snd_kcontrol *kcontrol,
			      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0x0f;
	int rshift = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	int invert = (kcontrol->private_value >> 24) & 0x01;
	int err, page_save;
	unsigned short val, val2, val_mask;
	
	page_save = snd_ac97_page_save(ac97, reg, kcontrol);
	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
		val = mask - val;
	val_mask = mask << shift;
	val = val << shift;
	if (shift != rshift) {
		val2 = (ucontrol->value.integer.value[1] & mask);
		if (invert)
			val2 = mask - val2;
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
	err = snd_ac97_update_bits(ac97, reg, val_mask, val);
	snd_ac97_page_restore(ac97, page_save);
#ifdef CONFIG_SND_AC97_POWER_SAVE
	/* check analog mixer power-down */
	if ((val_mask & 0x8000) &&
	    (kcontrol->private_value & (1<<30))) {
		if (val & 0x8000)
			ac97->power_up &= ~(1 << (reg>>1));
		else
			ac97->power_up |= 1 << (reg>>1);
		update_power_regs(ac97);
	}
#endif
	return err;
}

static const struct snd_kcontrol_new snd_ac97_controls_master_mono[2] = {
AC97_SINGLE("Master Mono Playback Switch", AC97_MASTER_MONO, 15, 1, 1),
AC97_SINGLE("Master Mono Playback Volume", AC97_MASTER_MONO, 0, 31, 1)
};

static const struct snd_kcontrol_new snd_ac97_controls_tone[2] = {
AC97_SINGLE("Tone Control - Bass", AC97_MASTER_TONE, 8, 15, 1),
AC97_SINGLE("Tone Control - Treble", AC97_MASTER_TONE, 0, 15, 1)
};

static const struct snd_kcontrol_new snd_ac97_controls_pc_beep[2] = {
AC97_SINGLE("PC Speaker Playback Switch", AC97_PC_BEEP, 15, 1, 1),
AC97_SINGLE("PC Speaker Playback Volume", AC97_PC_BEEP, 1, 15, 1)
};

static const struct snd_kcontrol_new snd_ac97_controls_mic_boost =
	AC97_SINGLE("Mic Boost (+20dB)", AC97_MIC, 6, 1, 0);


static const char* std_rec_sel[] = {"Mic", "CD", "Video", "Aux", "Line", "Mix", "Mix Mono", "Phone"};
static const char* std_3d_path[] = {"pre 3D", "post 3D"};
static const char* std_mix[] = {"Mix", "Mic"};
static const char* std_mic[] = {"Mic1", "Mic2"};

static const struct ac97_enum std_enum[] = {
AC97_ENUM_DOUBLE(AC97_REC_SEL, 8, 0, 8, std_rec_sel),
AC97_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 15, 2, std_3d_path),
AC97_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 9, 2, std_mix),
AC97_ENUM_SINGLE(AC97_GENERAL_PURPOSE, 8, 2, std_mic),
};

static const struct snd_kcontrol_new snd_ac97_control_capture_src = 
AC97_ENUM("Capture Source", std_enum[0]); 

static const struct snd_kcontrol_new snd_ac97_control_capture_vol =
AC97_DOUBLE("Capture Volume", AC97_REC_GAIN, 8, 0, 15, 0);

static const struct snd_kcontrol_new snd_ac97_controls_mic_capture[2] = {
AC97_SINGLE("Mic Capture Switch", AC97_REC_GAIN_MIC, 15, 1, 1),
AC97_SINGLE("Mic Capture Volume", AC97_REC_GAIN_MIC, 0, 15, 0)
};

enum {
	AC97_GENERAL_PCM_OUT = 0,
	AC97_GENERAL_STEREO_ENHANCEMENT,
	AC97_GENERAL_3D,
	AC97_GENERAL_LOUDNESS,
	AC97_GENERAL_MONO,
	AC97_GENERAL_MIC,
	AC97_GENERAL_LOOPBACK
};

static const struct snd_kcontrol_new snd_ac97_controls_general[7] = {
AC97_ENUM("PCM Out Path & Mute", std_enum[1]),
AC97_SINGLE("Simulated Stereo Enhancement", AC97_GENERAL_PURPOSE, 14, 1, 0),
AC97_SINGLE("3D Control - Switch", AC97_GENERAL_PURPOSE, 13, 1, 0),
AC97_SINGLE("Loudness (bass boost)", AC97_GENERAL_PURPOSE, 12, 1, 0),
AC97_ENUM("Mono Output Select", std_enum[2]),
AC97_ENUM("Mic Select", std_enum[3]),
AC97_SINGLE("ADC/DAC Loopback", AC97_GENERAL_PURPOSE, 7, 1, 0)
};

static const struct snd_kcontrol_new snd_ac97_controls_3d[2] = {
AC97_SINGLE("3D Control - Center", AC97_3D_CONTROL, 8, 15, 0),
AC97_SINGLE("3D Control - Depth", AC97_3D_CONTROL, 0, 15, 0)
};

static const struct snd_kcontrol_new snd_ac97_controls_center[2] = {
AC97_SINGLE("Center Playback Switch", AC97_CENTER_LFE_MASTER, 7, 1, 1),
AC97_SINGLE("Center Playback Volume", AC97_CENTER_LFE_MASTER, 0, 31, 1)
};

static const struct snd_kcontrol_new snd_ac97_controls_lfe[2] = {
AC97_SINGLE("LFE Playback Switch", AC97_CENTER_LFE_MASTER, 15, 1, 1),
AC97_SINGLE("LFE Playback Volume", AC97_CENTER_LFE_MASTER, 8, 31, 1)
};

static const struct snd_kcontrol_new snd_ac97_control_eapd =
AC97_SINGLE("External Amplifier", AC97_POWERDOWN, 15, 1, 1);

static const struct snd_kcontrol_new snd_ac97_controls_modem_switches[2] = {
AC97_SINGLE("Off-hook Switch", AC97_GPIO_STATUS, 0, 1, 0),
AC97_SINGLE("Caller ID Switch", AC97_GPIO_STATUS, 2, 1, 0)
};

/* change the existing EAPD control as inverted */
static void set_inv_eapd(struct snd_ac97 *ac97, struct snd_kcontrol *kctl)
{
	kctl->private_value = AC97_SINGLE_VALUE(AC97_POWERDOWN, 15, 1, 0);
	snd_ac97_update_bits(ac97, AC97_POWERDOWN, (1<<15), (1<<15)); /* EAPD up */
	ac97->scaps |= AC97_SCAP_INV_EAPD;
}

static int snd_ac97_spdif_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	uinfo->count = 1;
	return 0;
}
                        
static int snd_ac97_spdif_cmask_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.iec958.status[0] = IEC958_AES0_PROFESSIONAL |
					   IEC958_AES0_NONAUDIO |
					   IEC958_AES0_CON_EMPHASIS_5015 |
					   IEC958_AES0_CON_NOT_COPYRIGHT;
	ucontrol->value.iec958.status[1] = IEC958_AES1_CON_CATEGORY |
					   IEC958_AES1_CON_ORIGINAL;
	ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS;
	return 0;
}
                        
static int snd_ac97_spdif_pmask_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	/* FIXME: AC'97 spec doesn't say which bits are used for what */
	ucontrol->value.iec958.status[0] = IEC958_AES0_PROFESSIONAL |
					   IEC958_AES0_NONAUDIO |
					   IEC958_AES0_PRO_FS |
					   IEC958_AES0_PRO_EMPHASIS_5015;
	return 0;
}

static int snd_ac97_spdif_default_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);

	mutex_lock(&ac97->reg_mutex);
	ucontrol->value.iec958.status[0] = ac97->spdif_status & 0xff;
	ucontrol->value.iec958.status[1] = (ac97->spdif_status >> 8) & 0xff;
	ucontrol->value.iec958.status[2] = (ac97->spdif_status >> 16) & 0xff;
	ucontrol->value.iec958.status[3] = (ac97->spdif_status >> 24) & 0xff;
	mutex_unlock(&ac97->reg_mutex);
	return 0;
}
                        
static int snd_ac97_spdif_default_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	unsigned int new = 0;
	unsigned short val = 0;
	int change;

	new = val = ucontrol->value.iec958.status[0] & (IEC958_AES0_PROFESSIONAL|IEC958_AES0_NONAUDIO);
	if (ucontrol->value.iec958.status[0] & IEC958_AES0_PROFESSIONAL) {
		new |= ucontrol->value.iec958.status[0] & (IEC958_AES0_PRO_FS|IEC958_AES0_PRO_EMPHASIS_5015);
		switch (new & IEC958_AES0_PRO_FS) {
		case IEC958_AES0_PRO_FS_44100: val |= 0<<12; break;
		case IEC958_AES0_PRO_FS_48000: val |= 2<<12; break;
		case IEC958_AES0_PRO_FS_32000: val |= 3<<12; break;
		default:		       val |= 1<<12; break;
		}
		if ((new & IEC958_AES0_PRO_EMPHASIS) == IEC958_AES0_PRO_EMPHASIS_5015)
			val |= 1<<3;
	} else {
		new |= ucontrol->value.iec958.status[0] & (IEC958_AES0_CON_EMPHASIS_5015|IEC958_AES0_CON_NOT_COPYRIGHT);
		new |= ((ucontrol->value.iec958.status[1] & (IEC958_AES1_CON_CATEGORY|IEC958_AES1_CON_ORIGINAL)) << 8);
		new |= ((ucontrol->value.iec958.status[3] & IEC958_AES3_CON_FS) << 24);
		if ((new & IEC958_AES0_CON_EMPHASIS) == IEC958_AES0_CON_EMPHASIS_5015)
			val |= 1<<3;
		if (!(new & IEC958_AES0_CON_NOT_COPYRIGHT))
			val |= 1<<2;
		val |= ((new >> 8) & 0xff) << 4;	// category + original
		switch ((new >> 24) & 0xff) {
		case IEC958_AES3_CON_FS_44100: val |= 0<<12; break;
		case IEC958_AES3_CON_FS_48000: val |= 2<<12; break;
		case IEC958_AES3_CON_FS_32000: val |= 3<<12; break;
		default:		       val |= 1<<12; break;
		}
	}

	mutex_lock(&ac97->reg_mutex);
	change = ac97->spdif_status != new;
	ac97->spdif_status = new;

	if (ac97->flags & AC97_CS_SPDIF) {
		int x = (val >> 12) & 0x03;
		switch (x) {
		case 0: x = 1; break;  // 44.1
		case 2: x = 0; break;  // 48.0
		default: x = 0; break; // illegal.
		}
		change |= snd_ac97_update_bits_nolock(ac97, AC97_CSR_SPDIF, 0x3fff, ((val & 0xcfff) | (x << 12)));
	} else if (ac97->flags & AC97_CX_SPDIF) {
		int v;
		v = new & (IEC958_AES0_CON_EMPHASIS_5015|IEC958_AES0_CON_NOT_COPYRIGHT) ? 0 : AC97_CXR_COPYRGT;
		v |= new & IEC958_AES0_NONAUDIO ? AC97_CXR_SPDIF_AC3 : AC97_CXR_SPDIF_PCM;
		change |= snd_ac97_update_bits_nolock(ac97, AC97_CXR_AUDIO_MISC, 
						      AC97_CXR_SPDIF_MASK | AC97_CXR_COPYRGT,
						      v);
	} else if (ac97->id == AC97_ID_YMF743) {
		change |= snd_ac97_update_bits_nolock(ac97,
						      AC97_YMF7X3_DIT_CTRL,
						      0xff38,
						      ((val << 4) & 0xff00) |
						      ((val << 2) & 0x0038));
	} else {
		unsigned short extst = snd_ac97_read_cache(ac97, AC97_EXTENDED_STATUS);
		snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); /* turn off */

		change |= snd_ac97_update_bits_nolock(ac97, AC97_SPDIF, 0x3fff, val);
		if (extst & AC97_EA_SPDIF) {
			snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF); /* turn on again */
                }
	}
	mutex_unlock(&ac97->reg_mutex);

	return change;
}

static int snd_ac97_put_spsa(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 8) & 0xff;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	// int invert = (kcontrol->private_value >> 24) & 0xff;
	unsigned short value, old, new;
	int change;

	value = (ucontrol->value.integer.value[0] & mask);

	mutex_lock(&ac97->reg_mutex);
	mask <<= shift;
	value <<= shift;
	old = snd_ac97_read_cache(ac97, reg);
	new = (old & ~mask) | value;
	change = old != new;

	if (change) {
		unsigned short extst = snd_ac97_read_cache(ac97, AC97_EXTENDED_STATUS);
		snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0); /* turn off */
		change = snd_ac97_update_bits_nolock(ac97, reg, mask, value);
		if (extst & AC97_EA_SPDIF)
			snd_ac97_update_bits_nolock(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF); /* turn on again */
	}
	mutex_unlock(&ac97->reg_mutex);
	return change;
}

static const struct snd_kcontrol_new snd_ac97_controls_spdif[5] = {
	{
		.access = SNDRV_CTL_ELEM_ACCESS_READ,
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,CON_MASK),
		.info = snd_ac97_spdif_mask_info,
		.get = snd_ac97_spdif_cmask_get,
	},
	{
		.access = SNDRV_CTL_ELEM_ACCESS_READ,
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,PRO_MASK),
		.info = snd_ac97_spdif_mask_info,
		.get = snd_ac97_spdif_pmask_get,
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
		.info = snd_ac97_spdif_mask_info,
		.get = snd_ac97_spdif_default_get,
		.put = snd_ac97_spdif_default_put,
	},

	AC97_SINGLE(SNDRV_CTL_NAME_IEC958("",PLAYBACK,SWITCH),AC97_EXTENDED_STATUS, 2, 1, 0),
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = SNDRV_CTL_NAME_IEC958("",PLAYBACK,NONE) "AC97-SPSA",
		.info = snd_ac97_info_volsw,
		.get = snd_ac97_get_volsw,
		.put = snd_ac97_put_spsa,
		.private_value = AC97_SINGLE_VALUE(AC97_EXTENDED_STATUS, 4, 3, 0)
	},
};

#define AD18XX_PCM_BITS(xname, codec, lshift, rshift, mask) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .info = snd_ac97_ad18xx_pcm_info_bits, \
  .get = snd_ac97_ad18xx_pcm_get_bits, .put = snd_ac97_ad18xx_pcm_put_bits, \
  .private_value = (codec) | ((lshift) << 8) | ((rshift) << 12) | ((mask) << 16) }

static int snd_ac97_ad18xx_pcm_info_bits(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	int mask = (kcontrol->private_value >> 16) & 0x0f;
	int lshift = (kcontrol->private_value >> 8) & 0x0f;
	int rshift = (kcontrol->private_value >> 12) & 0x0f;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	if (lshift != rshift && (ac97->flags & AC97_STEREO_MUTES))
		uinfo->count = 2;
	else
		uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_ac97_ad18xx_pcm_get_bits(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	int codec = kcontrol->private_value & 3;
	int lshift = (kcontrol->private_value >> 8) & 0x0f;
	int rshift = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	
	ucontrol->value.integer.value[0] = mask - ((ac97->spec.ad18xx.pcmreg[codec] >> lshift) & mask);
	if (lshift != rshift && (ac97->flags & AC97_STEREO_MUTES))
		ucontrol->value.integer.value[1] = mask - ((ac97->spec.ad18xx.pcmreg[codec] >> rshift) & mask);
	return 0;
}

static int snd_ac97_ad18xx_pcm_put_bits(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	int codec = kcontrol->private_value & 3;
	int lshift = (kcontrol->private_value >> 8) & 0x0f;
	int rshift = (kcontrol->private_value >> 12) & 0x0f;
	int mask = (kcontrol->private_value >> 16) & 0xff;
	unsigned short val, valmask;
	
	val = (mask - (ucontrol->value.integer.value[0] & mask)) << lshift;
	valmask = mask << lshift;
	if (lshift != rshift && (ac97->flags & AC97_STEREO_MUTES)) {
		val |= (mask - (ucontrol->value.integer.value[1] & mask)) << rshift;
		valmask |= mask << rshift;
	}
	return snd_ac97_ad18xx_update_pcm_bits(ac97, codec, valmask, val);
}

#define AD18XX_PCM_VOLUME(xname, codec) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .info = snd_ac97_ad18xx_pcm_info_volume, \
  .get = snd_ac97_ad18xx_pcm_get_volume, .put = snd_ac97_ad18xx_pcm_put_volume, \
  .private_value = codec }

static int snd_ac97_ad18xx_pcm_info_volume(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 31;
	return 0;
}

static int snd_ac97_ad18xx_pcm_get_volume(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	int codec = kcontrol->private_value & 3;
	
	mutex_lock(&ac97->page_mutex);
	ucontrol->value.integer.value[0] = 31 - ((ac97->spec.ad18xx.pcmreg[codec] >> 0) & 31);
	ucontrol->value.integer.value[1] = 31 - ((ac97->spec.ad18xx.pcmreg[codec] >> 8) & 31);
	mutex_unlock(&ac97->page_mutex);
	return 0;
}

static int snd_ac97_ad18xx_pcm_put_volume(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
	int codec = kcontrol->private_value & 3;
	unsigned short val1, val2;
	
	val1 = 31 - (ucontrol->value.integer.value[0] & 31);
	val2 = 31 - (ucontrol->value.integer.value[1] & 31);
	return snd_ac97_ad18xx_update_pcm_bits(ac97, codec, 0x1f1f, (val1 << 8) | val2);
}

static const struct snd_kcontrol_new snd_ac97_controls_ad18xx_pcm[2] = {
AD18XX_PCM_BITS("PCM Playback Switch", 0, 15, 7, 1),
AD18XX_PCM_VOLUME("PCM Playback Volume", 0)
};

static const struct snd_kcontrol_new snd_ac97_controls_ad18xx_surround[2] = {
AD18XX_PCM_BITS("Surround Playback Switch", 1, 15, 7, 1),
AD18XX_PCM_VOLUME("Surround Playback Volume", 1)
};

static const struct snd_kcontrol_new snd_ac97_controls_ad18xx_center[2] = {
AD18XX_PCM_BITS("Center Playback Switch", 2, 15, 15, 1),
AD18XX_PCM_BITS("Center Playback Volume", 2, 8, 8, 31)
};

static const struct snd_kcontrol_new snd_ac97_controls_ad18xx_lfe[2] = {
AD18XX_PCM_BITS("LFE Playback Switch", 2, 7, 7, 1),
AD18XX_PCM_BITS("LFE Playback Volume", 2, 0, 0, 31)
};

/*
 *
 */

static void snd_ac97_powerdown(struct snd_ac97 *ac97);

static int snd_ac97_bus_free(struct snd_ac97_bus *bus)
{
	if (bus) {
		snd_ac97_bus_proc_done(bus);
		kfree(bus->pcms);
		if (bus->private_free)
			bus->private_free(bus);
		kfree(bus);
	}
	return 0;
}

static int snd_ac97_bus_dev_free(struct snd_device *device)
{
	struct snd_ac97_bus *bus = device->device_data;
	return snd_ac97_bus_free(bus);
}

static int snd_ac97_free(struct snd_ac97 *ac97)
{
	if (ac97) {
#ifdef CONFIG_SND_AC97_POWER_SAVE
		cancel_delayed_work(&ac97->power_work);
		flush_scheduled_work();
#endif
		snd_ac97_proc_done(ac97);
		if (ac97->bus)
			ac97->bus->codec[ac97->num] = NULL;
		if (ac97->private_free)
			ac97->private_free(ac97);
		kfree(ac97);
	}
	return 0;
}

static int snd_ac97_dev_free(struct snd_device *device)
{
	struct snd_ac97 *ac97 = device->device_data;
	snd_ac97_powerdown(ac97); /* for avoiding click noises during shut down */
	return snd_ac97_free(ac97);
}

static int snd_ac97_try_volume_mix(struct snd_ac97 * ac97, int reg)
{
	unsigned short val, mask = 0x8000;

	if (! snd_ac97_valid_reg(ac97, reg))
		return 0;

	switch (reg) {
	case AC97_MASTER_TONE:
		return ac97->caps & 0x04 ? 1 : 0;
	case AC97_HEADPHONE:
		return ac97->caps & 0x10 ? 1 : 0;
	case AC97_REC_GAIN_MIC:
		return ac97->caps & 0x01 ? 1 : 0;
	case AC97_3D_CONTROL:
		if (ac97->caps & 0x7c00) {
			val = snd_ac97_read(ac97, reg);
			/* if nonzero - fixed and we can't set it */
			return val == 0;
		}
		return 0;
	case AC97_CENTER_LFE_MASTER:	/* center */
		if ((ac97->ext_id & AC97_EI_CDAC) == 0)
			return 0;
		break;
	case AC97_CENTER_LFE_MASTER+1:	/* lfe */
		if ((ac97->ext_id & AC97_EI_LDAC) == 0)
			return 0;
		reg = AC97_CENTER_LFE_MASTER;
		mask = 0x0080;
		break;
	case AC97_SURROUND_MASTER:
		if ((ac97->ext_id & AC97_EI_SDAC) == 0)
			return 0;
		break;
	}

	val = snd_ac97_read(ac97, reg);
	if (!(val & mask)) {
		/* nothing seems to be here - mute flag is not set */
		/* try another test */
		snd_ac97_write_cache(ac97, reg, val | mask);
		val = snd_ac97_read(ac97, reg);
		val = snd_ac97_read(ac97, reg);
		if (!(val & mask))
			return 0;	/* nothing here */
	}
	return 1;		/* success, useable */
}

static void check_volume_resolution(struct snd_ac97 *ac97, int reg, unsigned char *lo_max, unsigned char *hi_max)
{
	unsigned short cbit[3] = { 0x20, 0x10, 0x01 };
	unsigned char max[3] = { 63, 31, 15 };
	int i;

	/* first look up the static resolution table */
	if (ac97->res_table) {
		const struct snd_ac97_res_table *tbl;
		for (tbl = ac97->res_table; tbl->reg; tbl++) {
			if (tbl->reg == reg) {
				*lo_max = tbl->bits & 0xff;
				*hi_max = (tbl->bits >> 8) & 0xff;
				return;
			}
		}
	}

	*lo_max = *hi_max = 0;
	for (i = 0 ; i < ARRAY_SIZE(cbit); i++) {
		unsigned short val;
		snd_ac97_write(ac97, reg, 0x8080 | cbit[i] | (cbit[i] << 8));
		/* Do the read twice due to buffers on some ac97 codecs.
		 * e.g. The STAC9704 returns exactly what you wrote to the register
		 * if you read it immediately. This causes the detect routine to fail.
		 */
		val = snd_ac97_read(ac97, reg);
		val = snd_ac97_read(ac97, reg);
		if (! *lo_max && (val & 0x7f) == cbit[i])
			*lo_max = max[i];
		if (! *hi_max && ((val >> 8) & 0x7f) == cbit[i])
			*hi_max = max[i];
		if (*lo_max && *hi_max)
			break;
	}
}

static int snd_ac97_try_bit(struct snd_ac97 * ac97, int reg, int bit)
{
	unsigned short mask, val, orig, res;

	mask = 1 << bit;
	orig = snd_ac97_read(ac97, reg);
	val = orig ^ mask;
	snd_ac97_write(ac97, reg, val);
	res = snd_ac97_read(ac97, reg);
	snd_ac97_write_cache(ac97, reg, orig);
	return res == val;
}

/* check the volume resolution of center/lfe */
static void snd_ac97_change_volume_params2(struct snd_ac97 * ac97, int reg, int shift, unsigned char *max)
{
	unsigned short val, val1;

	*max = 63;
	val = 0x8080 | (0x20 << shift);
	snd_ac97_write(ac97, reg, val);
	val1 = snd_ac97_read(ac97, reg);
	if (val != val1) {
		*max = 31;
	}
	/* reset volume to zero */
	snd_ac97_write_cache(ac97, reg, 0x8080);
}

static inline int printable(unsigned int x)
{
	x &= 0xff;
	if (x < ' ' || x >= 0x71) {
		if (x <= 0x89)
			return x - 0x71 + 'A';
		return '?';
	}
	return x;
}

static struct snd_kcontrol *snd_ac97_cnew(const struct snd_kcontrol_new *_template,
					  struct snd_ac97 * ac97)
{
	struct snd_kcontrol_new template;
	memcpy(&template, _template, sizeof(template));
	template.index = ac97->num;
	return snd_ctl_new1(&template, ac97);
}

/*
 * create mute switch(es) for normal stereo controls
 */
static int snd_ac97_cmute_new_stereo(struct snd_card *card, char *name, int reg,
				     int check_stereo, int check_amix,
				     struct snd_ac97 *ac97)
{
	struct snd_kcontrol *kctl;
	int err;
	unsigned short val, val1, mute_mask;

	if (! snd_ac97_valid_reg(ac97, reg))
		return 0;

	mute_mask = 0x8000;
	val = snd_ac97_read(ac97, reg);
	if (check_stereo || (ac97->flags & AC97_STEREO_MUTES)) {
		/* check whether both mute bits work */
		val1 = val | 0x8080;
		snd_ac97_write(ac97, reg, val1);
		if (val1 == snd_ac97_read(ac97, reg))
			mute_mask = 0x8080;
	}
	if (mute_mask == 0x8080) {
		struct snd_kcontrol_new tmp = AC97_DOUBLE(name, reg, 15, 7, 1, 1);
		if (check_amix)
			tmp.private_value |= (1 << 30);
		tmp.index = ac97->num;
		kctl = snd_ctl_new1(&tmp, ac97);
	} else {
		struct snd_kcontrol_new tmp = AC97_SINGLE(name, reg, 15, 1, 1);
		if (check_amix)
			tmp.private_value |= (1 << 30);
		tmp.index = ac97->num;
		kctl = snd_ctl_new1(&tmp, ac97);
	}
	err = snd_ctl_add(card, kctl);
	if (err < 0)
		return err;
	/* mute as default */
	snd_ac97_write_cache(ac97, reg, val | mute_mask);
	return 0;
}

/*
 * set dB information
 */
static const DECLARE_TLV_DB_SCALE(db_scale_4bit, -4500, 300, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_5bit, -4650, 150, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_6bit, -9450, 150, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_5bit_12db_max, -3450, 150, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_rec_gain, 0, 150, 0);

static const unsigned int *find_db_scale(unsigned int maxval)
{
	switch (maxval) {
	case 0x0f: return db_scale_4bit;
	case 0x1f: return db_scale_5bit;
	case 0x3f: return db_scale_6bit;
	}
	return NULL;
}

static void set_tlv_db_scale(struct snd_kcontrol *kctl, const unsigned int *tlv)
{
	kctl->tlv.p = tlv;
	if (tlv)
		kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
}

/*
 * create a volume for normal stereo/mono controls
 */
static int snd_ac97_cvol_new(struct snd_card *card, char *name, int reg, unsigned int lo_max,
			     unsigned int hi_max, struct snd_ac97 *ac97)
{
	int err;
	struct snd_kcontrol *kctl;

	if (! snd_ac97_valid_reg(ac97, reg))
		return 0;
	if (hi_max) {
		/* invert */
		struct snd_kcontrol_new tmp = AC97_DOUBLE(name, reg, 8, 0, lo_max, 1);
		tmp.index = ac97->num;
		kctl = snd_ctl_new1(&tmp, ac97);
	} else {
		/* invert */
		struct snd_kcontrol_new tmp = AC97_SINGLE(name, reg, 0, lo_max, 1);
		tmp.index = ac97->num;
		kctl = snd_ctl_new1(&tmp, ac97);
	}
	if (reg >= AC97_PHONE && reg <= AC97_PCM)
		set_tlv_db_scale(kctl, db_scale_5bit_12db_max);
	else
		set_tlv_db_scale(kctl, find_db_scale(lo_max));
	err = snd_ctl_add(card, kctl);
	if (err < 0)
		return err;
	snd_ac97_write_cache(ac97, reg,
			     (snd_ac97_read(ac97, reg) & 0x8080) |
			     lo_max | (hi_max << 8));
	return 0;
}

/*
 * create a mute-switch and a volume for normal stereo/mono controls
 */
static int snd_ac97_cmix_new_stereo(struct snd_card *card, const char *pfx,
				    int reg, int check_stereo, int check_amix,
				    struct snd_ac97 *ac97)
{
	int err;
	char name[44];
	unsigned char lo_max, hi_max;

	if (! snd_ac97_valid_reg(ac97, reg))
		return 0;

	if (snd_ac97_try_bit(ac97, reg, 15)) {
		sprintf(name, "%s Switch", pfx);
		if ((err = snd_ac97_cmute_new_stereo(card, name, reg,
						     check_stereo, check_amix,
						     ac97)) < 0)
			return err;
	}
	check_volume_resolution(ac97, reg, &lo_max, &hi_max);
	if (lo_max) {
		sprintf(name, "%s Volume", pfx);
		if ((err = snd_ac97_cvol_new(card, name, reg, lo_max, hi_max, ac97)) < 0)
			return err;
	}
	return 0;
}

#define snd_ac97_cmix_new(card, pfx, reg, acheck, ac97) \
	snd_ac97_cmix_new_stereo(card, pfx, reg, 0, acheck, ac97)
#define snd_ac97_cmute_new(card, name, reg, acheck, ac97) \
	snd_ac97_cmute_new_stereo(card, name, reg, 0, acheck, ac97)

static unsigned int snd_ac97_determine_spdif_rates(struct snd_ac97 *ac97);

static int snd_ac97_mixer_build(struct snd_ac97 * ac97)
{
	struct snd_card *card = ac97->bus->card;
	struct snd_kcontrol *kctl;
	int err;
	unsigned int idx;
	unsigned char max;

	/* build master controls */
	/* AD claims to remove this control from AD1887, although spec v2.2 does not allow this */
	if (snd_ac97_try_volume_mix(ac97, AC97_MASTER)) {
		if (ac97->flags & AC97_HAS_NO_MASTER_VOL)
			err = snd_ac97_cmute_new(card, "Master Playback Switch",
						 AC97_MASTER, 0, ac97);
		else
			err = snd_ac97_cmix_new(card, "Master Playback",
						AC97_MASTER, 0, ac97);
		if (err < 0)
			return err;
	}

	ac97->regs[AC97_CENTER_LFE_MASTER] = 0x8080;

	/* build center controls */
	if ((snd_ac97_try_volume_mix(ac97, AC97_CENTER_LFE_MASTER)) 
		&& !(ac97->flags & AC97_AD_MULTI)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_center[0], ac97))) < 0)
			return err;
		if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_center[1], ac97))) < 0)
			return err;
		snd_ac97_change_volume_params2(ac97, AC97_CENTER_LFE_MASTER, 0, &max);
		kctl->private_value &= ~(0xff << 16);
		kctl->private_value |= (int)max << 16;
		set_tlv_db_scale(kctl, find_db_scale(max));
		snd_ac97_write_cache(ac97, AC97_CENTER_LFE_MASTER, ac97->regs[AC97_CENTER_LFE_MASTER] | max);
	}

	/* build LFE controls */
	if ((snd_ac97_try_volume_mix(ac97, AC97_CENTER_LFE_MASTER+1))
		&& !(ac97->flags & AC97_AD_MULTI)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_lfe[0], ac97))) < 0)
			return err;
		if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_lfe[1], ac97))) < 0)
			return err;
		snd_ac97_change_volume_params2(ac97, AC97_CENTER_LFE_MASTER, 8, &max);
		kctl->private_value &= ~(0xff << 16);
		kctl->private_value |= (int)max << 16;
		set_tlv_db_scale(kctl, find_db_scale(max));
		snd_ac97_write_cache(ac97, AC97_CENTER_LFE_MASTER, ac97->regs[AC97_CENTER_LFE_MASTER] | max << 8);
	}

	/* build surround controls */
	if ((snd_ac97_try_volume_mix(ac97, AC97_SURROUND_MASTER)) 
		&& !(ac97->flags & AC97_AD_MULTI)) {
		/* Surround Master (0x38) is with stereo mutes */
		if ((err = snd_ac97_cmix_new_stereo(card, "Surround Playback",
						    AC97_SURROUND_MASTER, 1, 0,
						    ac97)) < 0)
			return err;
	}

	/* build headphone controls */
	if (snd_ac97_try_volume_mix(ac97, AC97_HEADPHONE)) {
		if ((err = snd_ac97_cmix_new(card, "Headphone Playback",
					     AC97_HEADPHONE, 0, ac97)) < 0)
			return err;
	}
	
	/* build master mono controls */
	if (snd_ac97_try_volume_mix(ac97, AC97_MASTER_MONO)) {
		if ((err = snd_ac97_cmix_new(card, "Master Mono Playback",
					     AC97_MASTER_MONO, 0, ac97)) < 0)
			return err;
	}
	
	/* build master tone controls */
	if (!(ac97->flags & AC97_HAS_NO_TONE)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_MASTER_TONE)) {
			for (idx = 0; idx < 2; idx++) {
				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_tone[idx], ac97))) < 0)
					return err;
				if (ac97->id == AC97_ID_YMF743 ||
				    ac97->id == AC97_ID_YMF753) {
					kctl->private_value &= ~(0xff << 16);
					kctl->private_value |= 7 << 16;
				}
			}
			snd_ac97_write_cache(ac97, AC97_MASTER_TONE, 0x0f0f);
		}
	}
	
	/* build PC Speaker controls */
	if (!(ac97->flags & AC97_HAS_NO_PC_BEEP) && 
		((ac97->flags & AC97_HAS_PC_BEEP) ||
	    snd_ac97_try_volume_mix(ac97, AC97_PC_BEEP))) {
		for (idx = 0; idx < 2; idx++)
			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_pc_beep[idx], ac97))) < 0)
				return err;
		set_tlv_db_scale(kctl, db_scale_4bit);
		snd_ac97_write_cache(ac97, AC97_PC_BEEP,
				     snd_ac97_read(ac97, AC97_PC_BEEP) | 0x801e);
	}
	
	/* build Phone controls */
	if (!(ac97->flags & AC97_HAS_NO_PHONE)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_PHONE)) {
			if ((err = snd_ac97_cmix_new(card, "Phone Playback",
						     AC97_PHONE, 1, ac97)) < 0)
				return err;
		}
	}
	
	/* build MIC controls */
	if (!(ac97->flags & AC97_HAS_NO_MIC)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_MIC)) {
			if ((err = snd_ac97_cmix_new(card, "Mic Playback",
						     AC97_MIC, 1, ac97)) < 0)
				return err;
			if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_mic_boost, ac97))) < 0)
				return err;
		}
	}

	/* build Line controls */
	if (snd_ac97_try_volume_mix(ac97, AC97_LINE)) {
		if ((err = snd_ac97_cmix_new(card, "Line Playback",
					     AC97_LINE, 1, ac97)) < 0)
			return err;
	}
	
	/* build CD controls */
	if (!(ac97->flags & AC97_HAS_NO_CD)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_CD)) {
			if ((err = snd_ac97_cmix_new(card, "CD Playback",
						     AC97_CD, 1, ac97)) < 0)
				return err;
		}
	}
	
	/* build Video controls */
	if (!(ac97->flags & AC97_HAS_NO_VIDEO)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_VIDEO)) {
			if ((err = snd_ac97_cmix_new(card, "Video Playback",
						     AC97_VIDEO, 1, ac97)) < 0)
				return err;
		}
	}

	/* build Aux controls */
	if (!(ac97->flags & AC97_HAS_NO_AUX)) {
		if (snd_ac97_try_volume_mix(ac97, AC97_AUX)) {
			if ((err = snd_ac97_cmix_new(card, "Aux Playback",
						     AC97_AUX, 1, ac97)) < 0)
				return err;
		}
	}

	/* build PCM controls */
	if (ac97->flags & AC97_AD_MULTI) {
		unsigned short init_val;
		if (ac97->flags & AC97_STEREO_MUTES)
			init_val = 0x9f9f;
		else
			init_val = 0x9f1f;
		for (idx = 0; idx < 2; idx++)
			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_pcm[idx], ac97))) < 0)
				return err;
		set_tlv_db_scale(kctl, db_scale_5bit);
		ac97->spec.ad18xx.pcmreg[0] = init_val;
		if (ac97->scaps & AC97_SCAP_SURROUND_DAC) {
			for (idx = 0; idx < 2; idx++)
				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_surround[idx], ac97))) < 0)
					return err;
			set_tlv_db_scale(kctl, db_scale_5bit);
			ac97->spec.ad18xx.pcmreg[1] = init_val;
		}
		if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC) {
			for (idx = 0; idx < 2; idx++)
				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_center[idx], ac97))) < 0)
					return err;
			set_tlv_db_scale(kctl, db_scale_5bit);
			for (idx = 0; idx < 2; idx++)
				if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_ad18xx_lfe[idx], ac97))) < 0)
					return err;
			set_tlv_db_scale(kctl, db_scale_5bit);
			ac97->spec.ad18xx.pcmreg[2] = init_val;
		}
		snd_ac97_write_cache(ac97, AC97_PCM, init_val);
	} else {
		if (!(ac97->flags & AC97_HAS_NO_STD_PCM)) {
			if (ac97->flags & AC97_HAS_NO_PCM_VOL)
				err = snd_ac97_cmute_new(card,
							 "PCM Playback Switch",
							 AC97_PCM, 0, ac97);
			else
				err = snd_ac97_cmix_new(card, "PCM Playback",
							AC97_PCM, 0, ac97);
			if (err < 0)
				return err;
		}
	}

	/* build Capture controls */
	if (!(ac97->flags & AC97_HAS_NO_REC_GAIN)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_control_capture_src, ac97))) < 0)
			return err;
		if (snd_ac97_try_bit(ac97, AC97_REC_GAIN, 15)) {
			err = snd_ac97_cmute_new(card, "Capture Switch",
						 AC97_REC_GAIN, 0, ac97);
			if (err < 0)
				return err;
		}
		if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_control_capture_vol, ac97))) < 0)
			return err;
		set_tlv_db_scale(kctl, db_scale_rec_gain);
		snd_ac97_write_cache(ac97, AC97_REC_SEL, 0x0000);
		snd_ac97_write_cache(ac97, AC97_REC_GAIN, 0x0000);
	}
	/* build MIC Capture controls */
	if (snd_ac97_try_volume_mix(ac97, AC97_REC_GAIN_MIC)) {
		for (idx = 0; idx < 2; idx++)
			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_mic_capture[idx], ac97))) < 0)
				return err;
		set_tlv_db_scale(kctl, db_scale_rec_gain);
		snd_ac97_write_cache(ac97, AC97_REC_GAIN_MIC, 0x0000);
	}

	/* build PCM out path & mute control */
	if (snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 15)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_PCM_OUT], ac97))) < 0)
			return err;
	}

	/* build Simulated Stereo Enhancement control */
	if (ac97->caps & 0x0008) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_STEREO_ENHANCEMENT], ac97))) < 0)
			return err;
	}

	/* build 3D Stereo Enhancement control */
	if (snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 13)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_3D], ac97))) < 0)
			return err;
	}

	/* build Loudness control */
	if (ac97->caps & 0x0020) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_LOUDNESS], ac97))) < 0)
			return err;
	}

	/* build Mono output select control */
	if (snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 9)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_MONO], ac97))) < 0)
			return err;
	}

	/* build Mic select control */
	if (snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 8)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_MIC], ac97))) < 0)
			return err;
	}

	/* build ADC/DAC loopback control */
	if (enable_loopback && snd_ac97_try_bit(ac97, AC97_GENERAL_PURPOSE, 7)) {
		if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_general[AC97_GENERAL_LOOPBACK], ac97))) < 0)
			return err;
	}

	snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE, ~AC97_GP_DRSS_MASK, 0x0000);

	/* build 3D controls */
	if (ac97->build_ops->build_3d) {
		ac97->build_ops->build_3d(ac97);
	} else {
		if (snd_ac97_try_volume_mix(ac97, AC97_3D_CONTROL)) {
			unsigned short val;
			val = 0x0707;
			snd_ac97_write(ac97, AC97_3D_CONTROL, val);
			val = snd_ac97_read(ac97, AC97_3D_CONTROL);
			val = val == 0x0606;
			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_3d[0], ac97))) < 0)
				return err;
			if (val)
				kctl->private_value = AC97_3D_CONTROL | (9 << 8) | (7 << 16);
			if ((err = snd_ctl_add(card, kctl = snd_ac97_cnew(&snd_ac97_controls_3d[1], ac97))) < 0)
				return err;
			if (val)
				kctl->private_value = AC97_3D_CONTROL | (1 << 8) | (7 << 16);
			snd_ac97_write_cache(ac97, AC97_3D_CONTROL, 0x0000);
		}
	}

	/* build S/PDIF controls */

	/* Hack for ASUS P5P800-VM, which does not indicate S/PDIF capability */
	if (ac97->subsystem_vendor == 0x1043 &&
	    ac97->subsystem_device == 0x810f)
		ac97->ext_id |= AC97_EI_SPDIF;

	if ((ac97->ext_id & AC97_EI_SPDIF) && !(ac97->scaps & AC97_SCAP_NO_SPDIF)) {
		if (ac97->build_ops->build_spdif) {
			if ((err = ac97->build_ops->build_spdif(ac97)) < 0)
				return err;
		} else {
			for (idx = 0; idx < 5; idx++)
				if ((err = snd_ctl_add(card, snd_ac97_cnew(&snd_ac97_controls_spdif[idx], ac97))) < 0)
					return err;
			if (ac97->build_ops->build_post_spdif) {
				if ((err = ac97->build_ops->build_post_spdif(ac97)) < 0)
					return err;
			}
			/* set default PCM S/PDIF params */
			/* consumer,PCM audio,no copyright,no preemphasis,PCM coder,original,48000Hz */
			snd_ac97_write_cache(ac97, AC97_SPDIF, 0x2a20);
			ac97->rates[AC97_RATES_SPDIF] = snd_ac97_determine_spdif_rates(ac97);
		}
		ac97->spdif_status = SNDRV_PCM_DEFAULT_CON_SPDIF;
	}
	
	/* build chip specific controls */
	if (ac97->build_ops->build_specific)
		if ((err = ac97->build_ops->build_specific(ac97)) < 0)
			return err;

	if (snd_ac97_try_bit(ac97, AC97_POWERDOWN, 15)) {
		kctl = snd_ac97_cnew(&snd_ac97_control_eapd, ac97);
		if (! kctl)
			return -ENOMEM;
		if (ac97->scaps & AC97_SCAP_INV_EAPD)
			set_inv_eapd(ac97, kctl);
		if ((err = snd_ctl_add(card, kctl)) < 0)
			return err;
	}

	return 0;
}

static int snd_ac97_modem_build(struct snd_card *card, struct snd_ac97 * ac97)
{
	int err, idx;

	/*
	printk(KERN_DEBUG "AC97_GPIO_CFG = %x\n",
	       snd_ac97_read(ac97,AC97_GPIO_CFG));
	*/
	snd_ac97_write(ac97, AC97_GPIO_CFG, 0xffff & ~(AC97_GPIO_LINE1_OH));
	snd_ac97_write(ac97, AC97_GPIO_POLARITY, 0xffff & ~(AC97_GPIO_LINE1_OH));
	snd_ac97_write(ac97, AC97_GPIO_STICKY, 0xffff);
	snd_ac97_write(ac97, AC97_GPIO_WAKEUP, 0x0);
	snd_ac97_write(ac97, AC97_MISC_AFE, 0x0);

	/* build modem switches */
	for (idx = 0; idx < ARRAY_SIZE(snd_ac97_controls_modem_switches); idx++)
		if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ac97_controls_modem_switches[idx], ac97))) < 0)
			return err;

	/* build chip specific controls */
	if (ac97->build_ops->build_specific)
		if ((err = ac97->build_ops->build_specific(ac97)) < 0)
			return err;

	return 0;
}

static int snd_ac97_test_rate(struct snd_ac97 *ac97, int reg, int shadow_reg, int rate)
{
	unsigned short val;
	unsigned int tmp;

	tmp = ((unsigned int)rate * ac97->bus->clock) / 48000;
	snd_ac97_write_cache(ac97, reg, tmp & 0xffff);
	if (shadow_reg)
		snd_ac97_write_cache(ac97, shadow_reg, tmp & 0xffff);
	val = snd_ac97_read(ac97, reg);
	return val == (tmp & 0xffff);
}

static void snd_ac97_determine_rates(struct snd_ac97 *ac97, int reg, int shadow_reg, unsigned int *r_result)
{
	unsigned int result = 0;
	unsigned short saved;

	if (ac97->bus->no_vra) {
		*r_result = SNDRV_PCM_RATE_48000;
		if ((ac97->flags & AC97_DOUBLE_RATE) &&
		    reg == AC97_PCM_FRONT_DAC_RATE)
			*r_result |= SNDRV_PCM_RATE_96000;
		return;
	}

	saved = snd_ac97_read(ac97, reg);
	if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE)
		snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,
				     AC97_EA_DRA, 0);
	/* test a non-standard rate */
	if (snd_ac97_test_rate(ac97, reg, shadow_reg, 11000))
		result |= SNDRV_PCM_RATE_CONTINUOUS;
	/* let's try to obtain standard rates */
	if (snd_ac97_test_rate(ac97, reg, shadow_reg, 8000))
		result |= SNDRV_PCM_RATE_8000;
	if (snd_ac97_test_rate(ac97, reg, shadow_reg, 11025))
		result |= SNDRV_PCM_RATE_11025;
	if (snd_ac97_test_rate(ac97, reg, shadow_reg, 16000))
		result |= SNDRV_PCM_RATE_16000;
	if (snd_ac97_test_rate(ac97, reg, shadow_reg, 22050))
		result |= SNDRV_PCM_RATE_22050;
	if (snd_ac97_test_rate(ac97, reg, shadow_reg, 32000))
		result |= SNDRV_PCM_RATE_32000;
	if (snd_ac97_test_rate(ac97, reg, shadow_reg, 44100))
		result |= SNDRV_PCM_RATE_44100;
	if (snd_ac97_test_rate(ac97, reg, shadow_reg, 48000))
		result |= SNDRV_PCM_RATE_48000;
	if ((ac97->flags & AC97_DOUBLE_RATE) &&
	    reg == AC97_PCM_FRONT_DAC_RATE) {
		/* test standard double rates */
		snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,
				     AC97_EA_DRA, AC97_EA_DRA);
		if (snd_ac97_test_rate(ac97, reg, shadow_reg, 64000 / 2))
			result |= SNDRV_PCM_RATE_64000;
		if (snd_ac97_test_rate(ac97, reg, shadow_reg, 88200 / 2))
			result |= SNDRV_PCM_RATE_88200;
		if (snd_ac97_test_rate(ac97, reg, shadow_reg, 96000 / 2))
			result |= SNDRV_PCM_RATE_96000;
		/* some codecs don't support variable double rates */
		if (!snd_ac97_test_rate(ac97, reg, shadow_reg, 76100 / 2))
			result &= ~SNDRV_PCM_RATE_CONTINUOUS;
		snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS,
				     AC97_EA_DRA, 0);
	}
	/* restore the default value */
	snd_ac97_write_cache(ac97, reg, saved);
	if (shadow_reg)
		snd_ac97_write_cache(ac97, shadow_reg, saved);
	*r_result = result;
}

/* check AC97_SPDIF register to accept which sample rates */
static unsigned int snd_ac97_determine_spdif_rates(struct snd_ac97 *ac97)
{
	unsigned int result = 0;
	int i;
	static unsigned short ctl_bits[] = {
		AC97_SC_SPSR_44K, AC97_SC_SPSR_32K, AC97_SC_SPSR_48K
	};
	static unsigned int rate_bits[] = {
		SNDRV_PCM_RATE_44100, SNDRV_PCM_RATE_32000, SNDRV_PCM_RATE_48000
	};

	for (i = 0; i < (int)ARRAY_SIZE(ctl_bits); i++) {
		snd_ac97_update_bits(ac97, AC97_SPDIF, AC97_SC_SPSR_MASK, ctl_bits[i]);
		if ((snd_ac97_read(ac97, AC97_SPDIF) & AC97_SC_SPSR_MASK) == ctl_bits[i])
			result |= rate_bits[i];
	}
	return result;
}

/* look for the codec id table matching with the given id */
static const struct ac97_codec_id *look_for_codec_id(const struct ac97_codec_id *table,
						     unsigned int id)
{
	const struct ac97_codec_id *pid;

	for (pid = table; pid->id; pid++)
		if (pid->id == (id & pid->mask))
			return pid;
	return NULL;
}

void snd_ac97_get_name(struct snd_ac97 *ac97, unsigned int id, char *name, int modem)
{
	const struct ac97_codec_id *pid;

	sprintf(name, "0x%x %c%c%c", id,
		printable(id >> 24),
		printable(id >> 16),
		printable(id >> 8));
	pid = look_for_codec_id(snd_ac97_codec_id_vendors, id);
	if (! pid)
		return;

	strcpy(name, pid->name);
	if (ac97 && pid->patch) {
		if ((modem && (pid->flags & AC97_MODEM_PATCH)) ||
		    (! modem && ! (pid->flags & AC97_MODEM_PATCH)))
			pid->patch(ac97);
	} 

	pid = look_for_codec_id(snd_ac97_codec_ids, id);
	if (pid) {
		strcat(name, " ");
		strcat(name, pid->name);
		if (pid->mask != 0xffffffff)
			sprintf(name + strlen(name), " rev %d", id & ~pid->mask);
		if (ac97 && pid->patch) {
			if ((modem && (pid->flags & AC97_MODEM_PATCH)) ||
			    (! modem && ! (pid->flags & AC97_MODEM_PATCH)))
				pid->patch(ac97);
		}
	} else
		sprintf(name + strlen(name), " id %x", id & 0xff);
}

/**
 * snd_ac97_get_short_name - retrieve codec name
 * @ac97: the codec instance
 *
 * Returns the short identifying name of the codec.
 */
const char *snd_ac97_get_short_name(struct snd_ac97 *ac97)
{
	const struct ac97_codec_id *pid;

	for (pid = snd_ac97_codec_ids; pid->id; pid++)
		if (pid->id == (ac97->id & pid->mask))
			return pid->name;
	return "unknown codec";
}

EXPORT_SYMBOL(snd_ac97_get_short_name);

/* wait for a while until registers are accessible after RESET
 * return 0 if ok, negative not ready
 */
static int ac97_reset_wait(struct snd_ac97 *ac97, int timeout, int with_modem)
{
	unsigned long end_time;
	unsigned short val;

	end_time = jiffies + timeout;
	do {
		
		/* use preliminary reads to settle the communication */
		snd_ac97_read(ac97, AC97_RESET);
		snd_ac97_read(ac97, AC97_VENDOR_ID1);
		snd_ac97_read(ac97, AC97_VENDOR_ID2);
		/* modem? */
		if (with_modem) {
			val = snd_ac97_read(ac97, AC97_EXTENDED_MID);
			if (val != 0xffff && (val & 1) != 0)
				return 0;
		}
		if (ac97->scaps & AC97_SCAP_DETECT_BY_VENDOR) {
			/* probably only Xbox issue - all registers are read as zero */
			val = snd_ac97_read(ac97, AC97_VENDOR_ID1);
			if (val != 0 && val != 0xffff)
				return 0;
		} else {
			/* because the PCM or MASTER volume registers can be modified,
			 * the REC_GAIN register is used for tests
			 */
			/* test if we can write to the record gain volume register */
			snd_ac97_write_cache(ac97, AC97_REC_GAIN, 0x8a05);
			if ((snd_ac97_read(ac97, AC97_REC_GAIN) & 0x7fff) == 0x0a05)
				return 0;
		}
		schedule_timeout_uninterruptible(1);
	} while (time_after_eq(end_time, jiffies));
	return -ENODEV;
}

/**
 * snd_ac97_bus - create an AC97 bus component
 * @card: the card instance
 * @num: the bus number
 * @ops: the bus callbacks table
 * @private_data: private data pointer for the new instance
 * @rbus: the pointer to store the new AC97 bus instance.
 *
 * Creates an AC97 bus component.  An struct snd_ac97_bus instance is newly
 * allocated and initialized.
 *
 * The ops table must include valid callbacks (at least read and
 * write).  The other callbacks, wait and reset, are not mandatory.
 * 
 * The clock is set to 48000.  If another clock is needed, set
 * (*rbus)->clock manually.
 *
 * The AC97 bus instance is registered as a low-level device, so you don't
 * have to release it manually.
 *
 * Returns zero if successful, or a negative error code on failure.
 */
int snd_ac97_bus(struct snd_card *card, int num, struct snd_ac97_bus_ops *ops,
		 void *private_data, struct snd_ac97_bus **rbus)
{
	int err;
	struct snd_ac97_bus *bus;
	static struct snd_device_ops dev_ops = {
		.dev_free =	snd_ac97_bus_dev_free,
	};

	if (snd_BUG_ON(!card))
		return -EINVAL;
	bus = kzalloc(sizeof(*bus), GFP_KERNEL);
	if (bus == NULL)
		return -ENOMEM;
	bus->card = card;
	bus->num = num;
	bus->ops = ops;
	bus->private_data = private_data;
	bus->clock = 48000;
	spin_lock_init(&bus->bus_lock);
	snd_ac97_bus_proc_init(bus);
	if ((err = snd_device_new(card, SNDRV_DEV_BUS, bus, &dev_ops)) < 0) {
		snd_ac97_bus_free(bus);
		return err;
	}
	if (rbus)
		*rbus = bus;
	return 0;
}

EXPORT_SYMBOL(snd_ac97_bus);

/* stop no dev release warning */
static void ac97_device_release(struct device * dev)
{
}

/* register ac97 codec to bus */
static int snd_ac97_dev_register(struct snd_device *device)
{
	struct snd_ac97 *ac97 = device->device_data;
	int err;

	ac97->dev.bus = &ac97_bus_type;
	ac97->dev.parent = ac97->bus->card->dev;
	ac97->dev.release = ac97_device_release;
	dev_set_name(&ac97->dev, "%d-%d:%s",
		     ac97->bus->card->number, ac97->num,
		     snd_ac97_get_short_name(ac97));
	if ((err = device_register(&ac97->dev)) < 0) {
		snd_printk(KERN_ERR "Can't register ac97 bus\n");
		ac97->dev.bus = NULL;
		return err;
	}
	return 0;
}

/* disconnect ac97 codec */
static int snd_ac97_dev_disconnect(struct snd_device *device)
{
	struct snd_ac97 *ac97 = device->device_data;
	if (ac97->dev.bus)
		device_unregister(&ac97->dev);
	return 0;
}

/* build_ops to do nothing */
static struct snd_ac97_build_ops null_build_ops;

#ifdef CONFIG_SND_AC97_POWER_SAVE
static void do_update_power(struct work_struct *work)
{
	update_power_regs(
		container_of(work, struct snd_ac97, power_work.work));
}
#endif

/**
 * snd_ac97_mixer - create an Codec97 component
 * @bus: the AC97 bus which codec is attached to
 * @template: the template of ac97, including index, callbacks and
 *         the private data.
 * @rac97: the pointer to store the new ac97 instance.
 *
 * Creates an Codec97 component.  An struct snd_ac97 instance is newly
 * allocated and initialized from the template.  The codec
 * is then initialized by the standard procedure.
 *
 * The template must include the codec number (num) and address (addr),
 * and the private data (private_data).
 * 
 * The ac97 instance is registered as a low-level device, so you don't
 * have to release it manually.
 *
 * Returns zero if successful, or a negative error code on failure.
 */
int snd_ac97_mixer(struct snd_ac97_bus *bus, struct snd_ac97_template *template, struct snd_ac97 **rac97)
{
	int err;
	struct snd_ac97 *ac97;
	struct snd_card *card;
	char name[64];
	unsigned long end_time;
	unsigned int reg;
	const struct ac97_codec_id *pid;
	static struct snd_device_ops ops = {
		.dev_free =	snd_ac97_dev_free,
		.dev_register =	snd_ac97_dev_register,
		.dev_disconnect =	snd_ac97_dev_disconnect,
	};

	if (rac97)
		*rac97 = NULL;
	if (snd_BUG_ON(!bus || !template))
		return -EINVAL;
	if (snd_BUG_ON(template->num >= 4))
		return -EINVAL;
	if (bus->codec[template->num])
		return -EBUSY;

	card = bus->card;
	ac97 = kzalloc(sizeof(*ac97), GFP_KERNEL);
	if (ac97 == NULL)
		return -ENOMEM;
	ac97->private_data = template->private_data;
	ac97->private_free = template->private_free;
	ac97->bus = bus;
	ac97->pci = template->pci;
	ac97->num = template->num;
	ac97->addr = template->addr;
	ac97->scaps = template->scaps;
	ac97->res_table = template->res_table;
	bus->codec[ac97->num] = ac97;
	mutex_init(&ac97->reg_mutex);
	mutex_init(&ac97->page_mutex);
#ifdef CONFIG_SND_AC97_POWER_SAVE
	INIT_DELAYED_WORK(&ac97->power_work, do_update_power);
#endif

#ifdef CONFIG_PCI
	if (ac97->pci) {
		pci_read_config_word(ac97->pci, PCI_SUBSYSTEM_VENDOR_ID, &ac97->subsystem_vendor);
		pci_read_config_word(ac97->pci, PCI_SUBSYSTEM_ID, &ac97->subsystem_device);
	}
#endif
	if (bus->ops->reset) {
		bus->ops->reset(ac97);
		goto __access_ok;
	}

	ac97->id = snd_ac97_read(ac97, AC97_VENDOR_ID1) << 16;
	ac97->id |= snd_ac97_read(ac97, AC97_VENDOR_ID2);
	if (ac97->id && ac97->id != (unsigned int)-1) {
		pid = look_for_codec_id(snd_ac97_codec_ids, ac97->id);
		if (pid && (pid->flags & AC97_DEFAULT_POWER_OFF))
			goto __access_ok;
	}

	/* reset to defaults */
	if (!(ac97->scaps & AC97_SCAP_SKIP_AUDIO))
		snd_ac97_write(ac97, AC97_RESET, 0);
	if (!(ac97->scaps & AC97_SCAP_SKIP_MODEM))
		snd_ac97_write(ac97, AC97_EXTENDED_MID, 0);
	if (bus->ops->wait)
		bus->ops->wait(ac97);
	else {
		udelay(50);
		if (ac97->scaps & AC97_SCAP_SKIP_AUDIO)
			err = ac97_reset_wait(ac97, msecs_to_jiffies(500), 1);
		else {
			err = ac97_reset_wait(ac97, msecs_to_jiffies(500), 0);
			if (err < 0)
				err = ac97_reset_wait(ac97,
						      msecs_to_jiffies(500), 1);
		}
		if (err < 0) {
			snd_printk(KERN_WARNING "AC'97 %d does not respond - RESET\n", ac97->num);
			/* proceed anyway - it's often non-critical */
		}
	}
      __access_ok:
	ac97->id = snd_ac97_read(ac97, AC97_VENDOR_ID1) << 16;
	ac97->id |= snd_ac97_read(ac97, AC97_VENDOR_ID2);
	if (! (ac97->scaps & AC97_SCAP_DETECT_BY_VENDOR) &&
	    (ac97->id == 0x00000000 || ac97->id == 0xffffffff)) {
		snd_printk(KERN_ERR "AC'97 %d access is not valid [0x%x], removing mixer.\n", ac97->num, ac97->id);
		snd_ac97_free(ac97);
		return -EIO;
	}
	pid = look_for_codec_id(snd_ac97_codec_ids, ac97->id);
	if (pid)
		ac97->flags |= pid->flags;
	
	/* test for AC'97 */
	if (!(ac97->scaps & AC97_SCAP_SKIP_AUDIO) && !(ac97->scaps & AC97_SCAP_AUDIO)) {
		/* test if we can write to the record gain volume register */
		snd_ac97_write_cache(ac97, AC97_REC_GAIN, 0x8a06);
		if (((err = snd_ac97_read(ac97, AC97_REC_GAIN)) & 0x7fff) == 0x0a06)
			ac97->scaps |= AC97_SCAP_AUDIO;
	}
	if (ac97->scaps & AC97_SCAP_AUDIO) {
		ac97->caps = snd_ac97_read(ac97, AC97_RESET);
		ac97->ext_id = snd_ac97_read(ac97, AC97_EXTENDED_ID);
		if (ac97->ext_id == 0xffff)	/* invalid combination */
			ac97->ext_id = 0;
	}

	/* test for MC'97 */
	if (!(ac97->scaps & AC97_SCAP_SKIP_MODEM) && !(ac97->scaps & AC97_SCAP_MODEM)) {
		ac97->ext_mid = snd_ac97_read(ac97, AC97_EXTENDED_MID);
		if (ac97->ext_mid == 0xffff)	/* invalid combination */
			ac97->ext_mid = 0;
		if (ac97->ext_mid & 1)
			ac97->scaps |= AC97_SCAP_MODEM;
	}

	if (!ac97_is_audio(ac97) && !ac97_is_modem(ac97)) {
		if (!(ac97->scaps & (AC97_SCAP_SKIP_AUDIO|AC97_SCAP_SKIP_MODEM)))
			snd_printk(KERN_ERR "AC'97 %d access error (not audio or modem codec)\n", ac97->num);
		snd_ac97_free(ac97);
		return -EACCES;
	}

	if (bus->ops->reset) // FIXME: always skipping?
		goto __ready_ok;

	/* FIXME: add powerdown control */
	if (ac97_is_audio(ac97)) {
		/* nothing should be in powerdown mode */
		snd_ac97_write_cache(ac97, AC97_POWERDOWN, 0);
		if (! (ac97->flags & AC97_DEFAULT_POWER_OFF)) {
			snd_ac97_write_cache(ac97, AC97_RESET, 0); /* reset to defaults */
			udelay(100);
			snd_ac97_write_cache(ac97, AC97_POWERDOWN, 0);
		}
		/* nothing should be in powerdown mode */
		snd_ac97_write_cache(ac97, AC97_GENERAL_PURPOSE, 0);
		end_time = jiffies + msecs_to_jiffies(120);
		do {
			if ((snd_ac97_read(ac97, AC97_POWERDOWN) & 0x0f) == 0x0f)
				goto __ready_ok;
			schedule_timeout_uninterruptible(1);
		} while (time_after_eq(end_time, jiffies));
		snd_printk(KERN_WARNING "AC'97 %d analog subsections not ready\n", ac97->num);
	}

	/* FIXME: add powerdown control */
	if (ac97_is_modem(ac97)) {
		unsigned char tmp;

		/* nothing should be in powerdown mode */
		/* note: it's important to set the rate at first */
		tmp = AC97_MEA_GPIO;
		if (ac97->ext_mid & AC97_MEI_LINE1) {
			snd_ac97_write_cache(ac97, AC97_LINE1_RATE, 8000);
			tmp |= AC97_MEA_ADC1 | AC97_MEA_DAC1;
		}
		if (ac97->ext_mid & AC97_MEI_LINE2) {
			snd_ac97_write_cache(ac97, AC97_LINE2_RATE, 8000);
			tmp |= AC97_MEA_ADC2 | AC97_MEA_DAC2;
		}
		if (ac97->ext_mid & AC97_MEI_HANDSET) {
			snd_ac97_write_cache(ac97, AC97_HANDSET_RATE, 8000);
			tmp |= AC97_MEA_HADC | AC97_MEA_HDAC;
		}
		snd_ac97_write_cache(ac97, AC97_EXTENDED_MSTATUS, 0);
		udelay(100);
		/* nothing should be in powerdown mode */
		snd_ac97_write_cache(ac97, AC97_EXTENDED_MSTATUS, 0);
		end_time = jiffies + msecs_to_jiffies(100);
		do {
			if ((snd_ac97_read(ac97, AC97_EXTENDED_MSTATUS) & tmp) == tmp)
				goto __ready_ok;
			schedule_timeout_uninterruptible(1);
		} while (time_after_eq(end_time, jiffies));
		snd_printk(KERN_WARNING "MC'97 %d converters and GPIO not ready (0x%x)\n", ac97->num, snd_ac97_read(ac97, AC97_EXTENDED_MSTATUS));
	}
	
      __ready_ok:
	if (ac97_is_audio(ac97))
		ac97->addr = (ac97->ext_id & AC97_EI_ADDR_MASK) >> AC97_EI_ADDR_SHIFT;
	else
		ac97->addr = (ac97->ext_mid & AC97_MEI_ADDR_MASK) >> AC97_MEI_ADDR_SHIFT;
	if (ac97->ext_id & 0x01c9) {	/* L/R, MIC, SDAC, LDAC VRA support */
		reg = snd_ac97_read(ac97, AC97_EXTENDED_STATUS);
		reg |= ac97->ext_id & 0x01c0; /* LDAC/SDAC/CDAC */
		if (! bus->no_vra)
			reg |= ac97->ext_id & 0x0009; /* VRA/VRM */
		snd_ac97_write_cache(ac97, AC97_EXTENDED_STATUS, reg);
	}
	if ((ac97->ext_id & AC97_EI_DRA) && bus->dra) {
		/* Intel controllers require double rate data to be put in
		 * slots 7+8, so let's hope the codec supports it. */
		snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE, AC97_GP_DRSS_MASK, AC97_GP_DRSS_78);
		if ((snd_ac97_read(ac97, AC97_GENERAL_PURPOSE) & AC97_GP_DRSS_MASK) == AC97_GP_DRSS_78)
			ac97->flags |= AC97_DOUBLE_RATE;
		/* restore to slots 10/11 to avoid the confliction with surrounds */
		snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE, AC97_GP_DRSS_MASK, 0);
	}
	if (ac97->ext_id & AC97_EI_VRA) {	/* VRA support */
		snd_ac97_determine_rates(ac97, AC97_PCM_FRONT_DAC_RATE, 0, &ac97->rates[AC97_RATES_FRONT_DAC]);
		snd_ac97_determine_rates(ac97, AC97_PCM_LR_ADC_RATE, 0, &ac97->rates[AC97_RATES_ADC]);
	} else {
		ac97->rates[AC97_RATES_FRONT_DAC] = SNDRV_PCM_RATE_48000;
		if (ac97->flags & AC97_DOUBLE_RATE)
			ac97->rates[AC97_RATES_FRONT_DAC] |= SNDRV_PCM_RATE_96000;
		ac97->rates[AC97_RATES_ADC] = SNDRV_PCM_RATE_48000;
	}
	if (ac97->ext_id & AC97_EI_SPDIF) {
		/* codec specific code (patch) should override these values */
		ac97->rates[AC97_RATES_SPDIF] = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_32000;
	}
	if (ac97->ext_id & AC97_EI_VRM) {	/* MIC VRA support */
		snd_ac97_determine_rates(ac97, AC97_PCM_MIC_ADC_RATE, 0, &ac97->rates[AC97_RATES_MIC_ADC]);
	} else {
		ac97->rates[AC97_RATES_MIC_ADC] = SNDRV_PCM_RATE_48000;
	}
	if (ac97->ext_id & AC97_EI_SDAC) {	/* SDAC support */
		snd_ac97_determine_rates(ac97, AC97_PCM_SURR_DAC_RATE, AC97_PCM_FRONT_DAC_RATE, &ac97->rates[AC97_RATES_SURR_DAC]);
		ac97->scaps |= AC97_SCAP_SURROUND_DAC;
	}
	if (ac97->ext_id & AC97_EI_LDAC) {	/* LDAC support */
		snd_ac97_determine_rates(ac97, AC97_PCM_LFE_DAC_RATE, AC97_PCM_FRONT_DAC_RATE, &ac97->rates[AC97_RATES_LFE_DAC]);
		ac97->scaps |= AC97_SCAP_CENTER_LFE_DAC;
	}
	/* additional initializations */
	if (bus->ops->init)
		bus->ops->init(ac97);
	snd_ac97_get_name(ac97, ac97->id, name, !ac97_is_audio(ac97));
	snd_ac97_get_name(NULL, ac97->id, name, !ac97_is_audio(ac97));  // ac97->id might be changed in the special setup code
	if (! ac97->build_ops)
		ac97->build_ops = &null_build_ops;

	if (ac97_is_audio(ac97)) {
		char comp[16];
		if (card->mixername[0] == '\0') {
			strcpy(card->mixername, name);
		} else {
			if (strlen(card->mixername) + 1 + strlen(name) + 1 <= sizeof(card->mixername)) {
				strcat(card->mixername, ",");
				strcat(card->mixername, name);
			}
		}
		sprintf(comp, "AC97a:%08x", ac97->id);
		if ((err = snd_component_add(card, comp)) < 0) {
			snd_ac97_free(ac97);
			return err;
		}
		if (snd_ac97_mixer_build(ac97) < 0) {
			snd_ac97_free(ac97);
			return -ENOMEM;
		}
	}
	if (ac97_is_modem(ac97)) {
		char comp[16];
		if (card->mixername[0] == '\0') {
			strcpy(card->mixername, name);
		} else {
			if (strlen(card->mixername) + 1 + strlen(name) + 1 <= sizeof(card->mixername)) {
				strcat(card->mixername, ",");
				strcat(card->mixername, name);
			}
		}
		sprintf(comp, "AC97m:%08x", ac97->id);
		if ((err = snd_component_add(card, comp)) < 0) {
			snd_ac97_free(ac97);
			return err;
		}
		if (snd_ac97_modem_build(card, ac97) < 0) {
			snd_ac97_free(ac97);
			return -ENOMEM;
		}
	}
	if (ac97_is_audio(ac97))
		update_power_regs(ac97);
	snd_ac97_proc_init(ac97);
	if ((err = snd_device_new(card, SNDRV_DEV_CODEC, ac97, &ops)) < 0) {
		snd_ac97_free(ac97);
		return err;
	}
	*rac97 = ac97;
	return 0;
}

EXPORT_SYMBOL(snd_ac97_mixer);

/*
 * Power down the chip.
 *
 * MASTER and HEADPHONE registers are muted but the register cache values
 * are not changed, so that the values can be restored in snd_ac97_resume().
 */
static void snd_ac97_powerdown(struct snd_ac97 *ac97)
{
	unsigned short power;

	if (ac97_is_audio(ac97)) {
		/* some codecs have stereo mute bits */
		snd_ac97_write(ac97, AC97_MASTER, 0x9f9f);
		snd_ac97_write(ac97, AC97_HEADPHONE, 0x9f9f);
	}

	/* surround, CLFE, mic powerdown */
	power = ac97->regs[AC97_EXTENDED_STATUS];
	if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
		power |= AC97_EA_PRJ;
	if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
		power |= AC97_EA_PRI | AC97_EA_PRK;
	power |= AC97_EA_PRL;
	snd_ac97_write(ac97, AC97_EXTENDED_STATUS, power);

	/* powerdown external amplifier */
	if (ac97->scaps & AC97_SCAP_INV_EAPD)
		power = ac97->regs[AC97_POWERDOWN] & ~AC97_PD_EAPD;
	else if (! (ac97->scaps & AC97_SCAP_EAPD_LED))
		power = ac97->regs[AC97_POWERDOWN] | AC97_PD_EAPD;
	power |= AC97_PD_PR6;	/* Headphone amplifier powerdown */
	power |= AC97_PD_PR0 | AC97_PD_PR1;	/* ADC & DAC powerdown */
	snd_ac97_write(ac97, AC97_POWERDOWN, power);
	udelay(100);
	power |= AC97_PD_PR2;	/* Analog Mixer powerdown (Vref on) */
	snd_ac97_write(ac97, AC97_POWERDOWN, power);
	if (ac97_is_power_save_mode(ac97)) {
		power |= AC97_PD_PR3;	/* Analog Mixer powerdown */
		snd_ac97_write(ac97, AC97_POWERDOWN, power);
		udelay(100);
		/* AC-link powerdown, internal Clk disable */
		/* FIXME: this may cause click noises on some boards */
		power |= AC97_PD_PR4 | AC97_PD_PR5;
		snd_ac97_write(ac97, AC97_POWERDOWN, power);
	}
}


struct ac97_power_reg {
	unsigned short reg;
	unsigned short power_reg;
	unsigned short mask;
};

enum { PWIDX_ADC, PWIDX_FRONT, PWIDX_CLFE, PWIDX_SURR, PWIDX_MIC, PWIDX_SIZE };

static struct ac97_power_reg power_regs[PWIDX_SIZE] = {
	[PWIDX_ADC] = { AC97_PCM_LR_ADC_RATE, AC97_POWERDOWN, AC97_PD_PR0},
	[PWIDX_FRONT] = { AC97_PCM_FRONT_DAC_RATE, AC97_POWERDOWN, AC97_PD_PR1},
	[PWIDX_CLFE] = { AC97_PCM_LFE_DAC_RATE, AC97_EXTENDED_STATUS,
			 AC97_EA_PRI | AC97_EA_PRK},
	[PWIDX_SURR] = { AC97_PCM_SURR_DAC_RATE, AC97_EXTENDED_STATUS,
			 AC97_EA_PRJ},
	[PWIDX_MIC] = { AC97_PCM_MIC_ADC_RATE, AC97_EXTENDED_STATUS,
			AC97_EA_PRL},
};

#ifdef CONFIG_SND_AC97_POWER_SAVE
/**
 * snd_ac97_update_power - update the powerdown register
 * @ac97: the codec instance
 * @reg: the rate register, e.g. AC97_PCM_FRONT_DAC_RATE
 * @powerup: non-zero when power up the part
 *
 * Update the AC97 powerdown register bits of the given part.
 */
int snd_ac97_update_power(struct snd_ac97 *ac97, int reg, int powerup)
{
	int i;

	if (! ac97)
		return 0;

	if (reg) {
		/* SPDIF requires DAC power, too */
		if (reg == AC97_SPDIF)
			reg = AC97_PCM_FRONT_DAC_RATE;
		for (i = 0; i < PWIDX_SIZE; i++) {
			if (power_regs[i].reg == reg) {
				if (powerup)
					ac97->power_up |= (1 << i);
				else
					ac97->power_up &= ~(1 << i);
				break;
			}
		}
	}

	if (ac97_is_power_save_mode(ac97) && !powerup)
		/* adjust power-down bits after two seconds delay
		 * (for avoiding loud click noises for many (OSS) apps
		 *  that open/close frequently)
		 */
		schedule_delayed_work(&ac97->power_work,
				      msecs_to_jiffies(power_save * 1000));
	else {
		cancel_delayed_work(&ac97->power_work);
		update_power_regs(ac97);
	}

	return 0;
}

EXPORT_SYMBOL(snd_ac97_update_power);
#endif /* CONFIG_SND_AC97_POWER_SAVE */

static void update_power_regs(struct snd_ac97 *ac97)
{
	unsigned int power_up, bits;
	int i;

	power_up = (1 << PWIDX_FRONT) | (1 << PWIDX_ADC);
	power_up |= (1 << PWIDX_MIC);
	if (ac97->scaps & AC97_SCAP_SURROUND_DAC)
		power_up |= (1 << PWIDX_SURR);
	if (ac97->scaps & AC97_SCAP_CENTER_LFE_DAC)
		power_up |= (1 << PWIDX_CLFE);
#ifdef CONFIG_SND_AC97_POWER_SAVE
	if (ac97_is_power_save_mode(ac97))
		power_up = ac97->power_up;
#endif
	if (power_up) {
		if (ac97->regs[AC97_POWERDOWN] & AC97_PD_PR2) {
			/* needs power-up analog mix and vref */
			snd_ac97_update_bits(ac97, AC97_POWERDOWN,
					     AC97_PD_PR3, 0);
			msleep(1);
			snd_ac97_update_bits(ac97, AC97_POWERDOWN,
					     AC97_PD_PR2, 0);
		}
	}
	for (i = 0; i < PWIDX_SIZE; i++) {
		if (power_up & (1 << i))
			bits = 0;
		else
			bits = power_regs[i].mask;
		snd_ac97_update_bits(ac97, power_regs[i].power_reg,
				     power_regs[i].mask, bits);
	}
	if (! power_up) {
		if (! (ac97->regs[AC97_POWERDOWN] & AC97_PD_PR2)) {
			/* power down analog mix and vref */
			snd_ac97_update_bits(ac97, AC97_POWERDOWN,
					     AC97_PD_PR2, AC97_PD_PR2);
			snd_ac97_update_bits(ac97, AC97_POWERDOWN,
					     AC97_PD_PR3, AC97_PD_PR3);
		}
	}
}


#ifdef CONFIG_PM
/**
 * snd_ac97_suspend - General suspend function for AC97 codec
 * @ac97: the ac97 instance
 *
 * Suspends the codec, power down the chip.
 */
void snd_ac97_suspend(struct snd_ac97 *ac97)
{
	if (! ac97)
		return;
	if (ac97->build_ops->suspend)
		ac97->build_ops->suspend(ac97);
#ifdef CONFIG_SND_AC97_POWER_SAVE
	cancel_delayed_work(&ac97->power_work);
	flush_scheduled_work();
#endif
	snd_ac97_powerdown(ac97);
}

EXPORT_SYMBOL(snd_ac97_suspend);

/*
 * restore ac97 status
 */
static void snd_ac97_restore_status(struct snd_ac97 *ac97)
{
	int i;

	for (i = 2; i < 0x7c ; i += 2) {
		if (i == AC97_POWERDOWN || i == AC97_EXTENDED_ID)
			continue;
		/* restore only accessible registers
		 * some chip (e.g. nm256) may hang up when unsupported registers
		 * are accessed..!
		 */
		if (test_bit(i, ac97->reg_accessed)) {
			snd_ac97_write(ac97, i, ac97->regs[i]);
			snd_ac97_read(ac97, i);
		}
	}
}

/*
 * restore IEC958 status
 */
static void snd_ac97_restore_iec958(struct snd_ac97 *ac97)
{
	if (ac97->ext_id & AC97_EI_SPDIF) {
		if (ac97->regs[AC97_EXTENDED_STATUS] & AC97_EA_SPDIF) {
			/* reset spdif status */
			snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, 0);
			snd_ac97_write(ac97, AC97_EXTENDED_STATUS, ac97->regs[AC97_EXTENDED_STATUS]);
			if (ac97->flags & AC97_CS_SPDIF)
				snd_ac97_write(ac97, AC97_CSR_SPDIF, ac97->regs[AC97_CSR_SPDIF]);
			else
				snd_ac97_write(ac97, AC97_SPDIF, ac97->regs[AC97_SPDIF]);
			snd_ac97_update_bits(ac97, AC97_EXTENDED_STATUS, AC97_EA_SPDIF, AC97_EA_SPDIF); /* turn on again */
		}
	}
}

/**
 * snd_ac97_resume - General resume function for AC97 codec
 * @ac97: the ac97 instance
 *
 * Do the standard resume procedure, power up and restoring the
 * old register values.
 */
void snd_ac97_resume(struct snd_ac97 *ac97)
{
	unsigned long end_time;

	if (! ac97)
		return;

	if (ac97->bus->ops->reset) {
		ac97->bus->ops->reset(ac97);
		goto  __reset_ready;
	}

	snd_ac97_write(ac97, AC97_POWERDOWN, 0);
	if (! (ac97->flags & AC97_DEFAULT_POWER_OFF)) {
		if (!(ac97->scaps & AC97_SCAP_SKIP_AUDIO))
			snd_ac97_write(ac97, AC97_RESET, 0);
		else if (!(ac97->scaps & AC97_SCAP_SKIP_MODEM))
			snd_ac97_write(ac97, AC97_EXTENDED_MID, 0);
		udelay(100);
		snd_ac97_write(ac97, AC97_POWERDOWN, 0);
	}
	snd_ac97_write(ac97, AC97_GENERAL_PURPOSE, 0);

	snd_ac97_write(ac97, AC97_POWERDOWN, ac97->regs[AC97_POWERDOWN]);
	if (ac97_is_audio(ac97)) {
		ac97->bus->ops->write(ac97, AC97_MASTER, 0x8101);
		end_time = jiffies + msecs_to_jiffies(100);
		do {
			if (snd_ac97_read(ac97, AC97_MASTER) == 0x8101)
				break;
			schedule_timeout_uninterruptible(1);
		} while (time_after_eq(end_time, jiffies));
		/* FIXME: extra delay */
		ac97->bus->ops->write(ac97, AC97_MASTER, 0x8000);
		if (snd_ac97_read(ac97, AC97_MASTER) != 0x8000)
			msleep(250);
	} else {
		end_time = jiffies + msecs_to_jiffies(100);
		do {
			unsigned short val = snd_ac97_read(ac97, AC97_EXTENDED_MID);
			if (val != 0xffff && (val & 1) != 0)
				break;
			schedule_timeout_uninterruptible(1);
		} while (time_after_eq(end_time, jiffies));
	}
__reset_ready:

	if (ac97->bus->ops->init)
		ac97->bus->ops->init(ac97);

	if (ac97->build_ops->resume)
		ac97->build_ops->resume(ac97);
	else {
		snd_ac97_restore_status(ac97);
		snd_ac97_restore_iec958(ac97);
	}
}

EXPORT_SYMBOL(snd_ac97_resume);
#endif


/*
 * Hardware tuning
 */
static void set_ctl_name(char *dst, const char *src, const char *suffix)
{
	if (suffix)
		sprintf(dst, "%s %s", src, suffix);
	else
		strcpy(dst, src);
}	

/* remove the control with the given name and optional suffix */
static int snd_ac97_remove_ctl(struct snd_ac97 *ac97, const char *name,
			       const char *suffix)
{
	struct snd_ctl_elem_id id;
	memset(&id, 0, sizeof(id));
	set_ctl_name(id.name, name, suffix);
	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	return snd_ctl_remove_id(ac97->bus->card, &id);
}

static struct snd_kcontrol *ctl_find(struct snd_ac97 *ac97, const char *name, const char *suffix)
{
	struct snd_ctl_elem_id sid;
	memset(&sid, 0, sizeof(sid));
	set_ctl_name(sid.name, name, suffix);
	sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	return snd_ctl_find_id(ac97->bus->card, &sid);
}

/* rename the control with the given name and optional suffix */
static int snd_ac97_rename_ctl(struct snd_ac97 *ac97, const char *src,
			       const char *dst, const char *suffix)
{
	struct snd_kcontrol *kctl = ctl_find(ac97, src, suffix);
	if (kctl) {
		set_ctl_name(kctl->id.name, dst, suffix);
		return 0;
	}
	return -ENOENT;
}

/* rename both Volume and Switch controls - don't check the return value */
static void snd_ac97_rename_vol_ctl(struct snd_ac97 *ac97, const char *src,
				    const char *dst)
{
	snd_ac97_rename_ctl(ac97, src, dst, "Switch");
	snd_ac97_rename_ctl(ac97, src, dst, "Volume");
}

/* swap controls */
static int snd_ac97_swap_ctl(struct snd_ac97 *ac97, const char *s1,
			     const char *s2, const char *suffix)
{
	struct snd_kcontrol *kctl1, *kctl2;
	kctl1 = ctl_find(ac97, s1, suffix);
	kctl2 = ctl_find(ac97, s2, suffix);
	if (kctl1 && kctl2) {
		set_ctl_name(kctl1->id.name, s2, suffix);
		set_ctl_name(kctl2->id.name, s1, suffix);
		return 0;
	}
	return -ENOENT;
}

#if 1
/* bind hp and master controls instead of using only hp control */
static int bind_hp_volsw_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	int err = snd_ac97_put_volsw(kcontrol, ucontrol);
	if (err > 0) {
		unsigned long priv_saved = kcontrol->private_value;
		kcontrol->private_value = (kcontrol->private_value & ~0xff) | AC97_HEADPHONE;
		snd_ac97_put_volsw(kcontrol, ucontrol);
		kcontrol->private_value = priv_saved;
	}
	return err;
}

/* ac97 tune: bind Master and Headphone controls */
static int tune_hp_only(struct snd_ac97 *ac97)
{
	struct snd_kcontrol *msw = ctl_find(ac97, "Master Playback Switch", NULL);
	struct snd_kcontrol *mvol = ctl_find(ac97, "Master Playback Volume", NULL);
	if (! msw || ! mvol)
		return -ENOENT;
	msw->put = bind_hp_volsw_put;
	mvol->put = bind_hp_volsw_put;
	snd_ac97_remove_ctl(ac97, "Headphone Playback", "Switch");
	snd_ac97_remove_ctl(ac97, "Headphone Playback", "Volume");
	return 0;
}

#else
/* ac97 tune: use Headphone control as master */
static int tune_hp_only(struct snd_ac97 *ac97)
{
	if (ctl_find(ac97, "Headphone Playback Switch", NULL) == NULL)
		return -ENOENT;
	snd_ac97_remove_ctl(ac97, "Master Playback", "Switch");
	snd_ac97_remove_ctl(ac97, "Master Playback", "Volume");
	snd_ac97_rename_vol_ctl(ac97, "Headphone Playback", "Master Playback");
	return 0;
}
#endif

/* ac97 tune: swap Headphone and Master controls */
static int tune_swap_hp(struct snd_ac97 *ac97)
{
	if (ctl_find(ac97, "Headphone Playback Switch", NULL) == NULL)
		return -ENOENT;
	snd_ac97_rename_vol_ctl(ac97, "Master Playback", "Line-Out Playback");
	snd_ac97_rename_vol_ctl(ac97, "Headphone Playback", "Master Playback");
	return 0;
}

/* ac97 tune: swap Surround and Master controls */
static int tune_swap_surround(struct snd_ac97 *ac97)
{
	if (snd_ac97_swap_ctl(ac97, "Master Playback", "Surround Playback", "Switch") ||
	    snd_ac97_swap_ctl(ac97, "Master Playback", "Surround Playback", "Volume"))
		return -ENOENT;
	return 0;
}

/* ac97 tune: set up mic sharing for AD codecs */
static int tune_ad_sharing(struct snd_ac97 *ac97)
{
	unsigned short scfg;
	if ((ac97->id & 0xffffff00) != 0x41445300) {
		snd_printk(KERN_ERR "ac97_quirk AD_SHARING is only for AD codecs\n");
		return -EINVAL;
	}
	/* Turn on OMS bit to route microphone to back panel */
	scfg = snd_ac97_read(ac97, AC97_AD_SERIAL_CFG);
	snd_ac97_write_cache(ac97, AC97_AD_SERIAL_CFG, scfg | 0x0200);
	return 0;
}

static const struct snd_kcontrol_new snd_ac97_alc_jack_detect = 
AC97_SINGLE("Jack Detect", AC97_ALC650_CLOCK, 5, 1, 0);

/* ac97 tune: set up ALC jack-select */
static int tune_alc_jack(struct snd_ac97 *ac97)
{
	if ((ac97->id & 0xffffff00) != 0x414c4700) {
		snd_printk(KERN_ERR "ac97_quirk ALC_JACK is only for Realtek codecs\n");
		return -EINVAL;
	}
	snd_ac97_update_bits(ac97, 0x7a, 0x20, 0x20); /* select jack detect function */
	snd_ac97_update_bits(ac97, 0x7a, 0x01, 0x01); /* Line-out auto mute */
	if (ac97->id == AC97_ID_ALC658D)
		snd_ac97_update_bits(ac97, 0x74, 0x0800, 0x0800);
	return snd_ctl_add(ac97->bus->card, snd_ac97_cnew(&snd_ac97_alc_jack_detect, ac97));
}

/* ac97 tune: inversed EAPD bit */
static int tune_inv_eapd(struct snd_ac97 *ac97)
{
	struct snd_kcontrol *kctl = ctl_find(ac97, "External Amplifier", NULL);
	if (! kctl)
		return -ENOENT;
	set_inv_eapd(ac97, kctl);
	return 0;
}

static int master_mute_sw_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	int err = snd_ac97_put_volsw(kcontrol, ucontrol);
	if (err > 0) {
		struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
		int shift = (kcontrol->private_value >> 8) & 0x0f;
		int rshift = (kcontrol->private_value >> 12) & 0x0f;
		unsigned short mask;
		if (shift != rshift)
			mask = 0x8080;
		else
			mask = 0x8000;
		snd_ac97_update_bits(ac97, AC97_POWERDOWN, 0x8000,
				     (ac97->regs[AC97_MASTER] & mask) == mask ?
				     0x8000 : 0);
	}
	return err;
}

/* ac97 tune: EAPD controls mute LED bound with the master mute */
static int tune_mute_led(struct snd_ac97 *ac97)
{
	struct snd_kcontrol *msw = ctl_find(ac97, "Master Playback Switch", NULL);
	if (! msw)
		return -ENOENT;
	msw->put = master_mute_sw_put;
	snd_ac97_remove_ctl(ac97, "External Amplifier", NULL);
	snd_ac97_update_bits(ac97, AC97_POWERDOWN, 0x8000, 0x8000); /* mute LED on */
	ac97->scaps |= AC97_SCAP_EAPD_LED;
	return 0;
}

static int hp_master_mute_sw_put(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
	int err = bind_hp_volsw_put(kcontrol, ucontrol);
	if (err > 0) {
		struct snd_ac97 *ac97 = snd_kcontrol_chip(kcontrol);
		int shift = (kcontrol->private_value >> 8) & 0x0f;
		int rshift = (kcontrol->private_value >> 12) & 0x0f;
		unsigned short mask;
		if (shift != rshift)
			mask = 0x8080;
		else
			mask = 0x8000;
		snd_ac97_update_bits(ac97, AC97_POWERDOWN, 0x8000,
				     (ac97->regs[AC97_MASTER] & mask) == mask ?
				     0x8000 : 0);
	}
	return err;
}

static int tune_hp_mute_led(struct snd_ac97 *ac97)
{
	struct snd_kcontrol *msw = ctl_find(ac97, "Master Playback Switch", NULL);
	struct snd_kcontrol *mvol = ctl_find(ac97, "Master Playback Volume", NULL);
	if (! msw || ! mvol)
		return -ENOENT;
	msw->put = hp_master_mute_sw_put;
	mvol->put = bind_hp_volsw_put;
	snd_ac97_remove_ctl(ac97, "External Amplifier", NULL);
	snd_ac97_remove_ctl(ac97, "Headphone Playback", "Switch");
	snd_ac97_remove_ctl(ac97, "Headphone Playback", "Volume");
	snd_ac97_update_bits(ac97, AC97_POWERDOWN, 0x8000, 0x8000); /* mute LED on */
	return 0;
}

struct quirk_table {
	const char *name;
	int (*func)(struct snd_ac97 *);
};

static struct quirk_table applicable_quirks[] = {
	{ "none", NULL },
	{ "hp_only", tune_hp_only },
	{ "swap_hp", tune_swap_hp },
	{ "swap_surround", tune_swap_surround },
	{ "ad_sharing", tune_ad_sharing },
	{ "alc_jack", tune_alc_jack },
	{ "inv_eapd", tune_inv_eapd },
	{ "mute_led", tune_mute_led },
	{ "hp_mute_led", tune_hp_mute_led },
};

/* apply the quirk with the given type */
static int apply_quirk(struct snd_ac97 *ac97, int type)
{
	if (type <= 0)
		return 0;
	else if (type >= ARRAY_SIZE(applicable_quirks))
		return -EINVAL;
	if (applicable_quirks[type].func)
		return applicable_quirks[type].func(ac97);
	return 0;
}

/* apply the quirk with the given name */
static int apply_quirk_str(struct snd_ac97 *ac97, const char *typestr)
{
	int i;
	struct quirk_table *q;

	for (i = 0; i < ARRAY_SIZE(applicable_quirks); i++) {
		q = &applicable_quirks[i];
		if (q->name && ! strcmp(typestr, q->name))
			return apply_quirk(ac97, i);
	}
	/* for compatibility, accept the numbers, too */
	if (*typestr >= '0' && *typestr <= '9')
		return apply_quirk(ac97, (int)simple_strtoul(typestr, NULL, 10));
	return -EINVAL;
}

/**
 * snd_ac97_tune_hardware - tune up the hardware
 * @ac97: the ac97 instance
 * @quirk: quirk list
 * @override: explicit quirk value (overrides the list if non-NULL)
 *
 * Do some workaround for each pci device, such as renaming of the
 * headphone (true line-out) control as "Master".
 * The quirk-list must be terminated with a zero-filled entry.
 *
 * Returns zero if successful, or a negative error code on failure.
 */

int snd_ac97_tune_hardware(struct snd_ac97 *ac97, struct ac97_quirk *quirk, const char *override)
{
	int result;

	/* quirk overriden? */
	if (override && strcmp(override, "-1") && strcmp(override, "default")) {
		result = apply_quirk_str(ac97, override);
		if (result < 0)
			snd_printk(KERN_ERR "applying quirk type %s failed (%d)\n", override, result);
		return result;
	}

	if (! quirk)
		return -EINVAL;

	for (; quirk->subvendor; quirk++) {
		if (quirk->subvendor != ac97->subsystem_vendor)
			continue;
		if ((! quirk->mask && quirk->subdevice == ac97->subsystem_device) ||
		    quirk->subdevice == (quirk->mask & ac97->subsystem_device)) {
			if (quirk->codec_id && quirk->codec_id != ac97->id)
				continue;
			snd_printdd("ac97 quirk for %s (%04x:%04x)\n", quirk->name, ac97->subsystem_vendor, ac97->subsystem_device);
			result = apply_quirk(ac97, quirk->type);
			if (result < 0)
				snd_printk(KERN_ERR "applying quirk type %d for %s failed (%d)\n", quirk->type, quirk->name, result);
			return result;
		}
	}
	return 0;
}

EXPORT_SYMBOL(snd_ac97_tune_hardware);

/*
 *  INIT part
 */

static int __init alsa_ac97_init(void)
{
	return 0;
}

static void __exit alsa_ac97_exit(void)
{
}

module_init(alsa_ac97_init)
module_exit(alsa_ac97_exit)