summaryrefslogtreecommitdiffstats
path: root/drivers/video/aty/atyfb_base.c
blob: 5e4523ae85b108b0fc3e2fd61ea0ea1101a4ab08 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
/*
 *  ATI Frame Buffer Device Driver Core
 *
 *	Copyright (C) 2004  Alex Kern <alex.kern@gmx.de>
 *	Copyright (C) 1997-2001  Geert Uytterhoeven
 *	Copyright (C) 1998  Bernd Harries
 *	Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
 *
 *  This driver supports the following ATI graphics chips:
 *    - ATI Mach64
 *
 *  To do: add support for
 *    - ATI Rage128 (from aty128fb.c)
 *    - ATI Radeon (from radeonfb.c)
 *
 *  This driver is partly based on the PowerMac console driver:
 *
 *	Copyright (C) 1996 Paul Mackerras
 *
 *  and on the PowerMac ATI/mach64 display driver:
 *
 *	Copyright (C) 1997 Michael AK Tesch
 *
 *	      with work by Jon Howell
 *			   Harry AC Eaton
 *			   Anthony Tong <atong@uiuc.edu>
 *
 *  Generic LCD support written by Daniel Mantione, ported from 2.4.20 by Alex Kern
 *  Many Thanks to Ville Syrjälä for patches and fixing nasting 16 bit color bug.
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License. See the file COPYING in the main directory of this archive for
 *  more details.
 *
 *  Many thanks to Nitya from ATI devrel for support and patience !
 */

/******************************************************************************

  TODO:

    - cursor support on all cards and all ramdacs.
    - cursor parameters controlable via ioctl()s.
    - guess PLL and MCLK based on the original PLL register values initialized
      by Open Firmware (if they are initialized). BIOS is done

    (Anyone with Mac to help with this?)

******************************************************************************/


#include <linux/config.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/console.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/wait.h>

#include <asm/io.h>
#include <asm/uaccess.h>

#include <video/mach64.h>
#include "atyfb.h"
#include "ati_ids.h"

#ifdef __powerpc__
#include <asm/prom.h>
#include "../macmodes.h"
#endif
#ifdef __sparc__
#include <asm/pbm.h>
#include <asm/fbio.h>
#endif

#ifdef CONFIG_ADB_PMU
#include <linux/adb.h>
#include <linux/pmu.h>
#endif
#ifdef CONFIG_BOOTX_TEXT
#include <asm/btext.h>
#endif
#ifdef CONFIG_PMAC_BACKLIGHT
#include <asm/backlight.h>
#endif
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif

/*
 * Debug flags.
 */
#undef DEBUG
/*#define DEBUG*/

/* Make sure n * PAGE_SIZE is protected at end of Aperture for GUI-regs */
/*  - must be large enough to catch all GUI-Regs   */
/*  - must be aligned to a PAGE boundary           */
#define GUI_RESERVE	(1 * PAGE_SIZE)

/* FIXME: remove the FAIL definition */
#define FAIL(msg) do { printk(KERN_CRIT "atyfb: " msg "\n"); return -EINVAL; } while (0)
#define FAIL_MAX(msg, x, _max_) do { if(x > _max_) { printk(KERN_CRIT "atyfb: " msg " %x(%x)\n", x, _max_); return -EINVAL; } } while (0)

#ifdef DEBUG
#define DPRINTK(fmt, args...)	printk(KERN_DEBUG "atyfb: " fmt, ## args)
#else
#define DPRINTK(fmt, args...)
#endif

#define PRINTKI(fmt, args...)	printk(KERN_INFO "atyfb: " fmt, ## args)
#define PRINTKE(fmt, args...)	 printk(KERN_ERR "atyfb: " fmt, ## args)

#if defined(CONFIG_PM) || defined(CONFIG_PMAC_BACKLIGHT) || defined (CONFIG_FB_ATY_GENERIC_LCD)
static const u32 lt_lcd_regs[] = {
	CONFIG_PANEL_LG,
	LCD_GEN_CNTL_LG,
	DSTN_CONTROL_LG,
	HFB_PITCH_ADDR_LG,
	HORZ_STRETCHING_LG,
	VERT_STRETCHING_LG,
	0, /* EXT_VERT_STRETCH */
	LT_GIO_LG,
	POWER_MANAGEMENT_LG
};

void aty_st_lcd(int index, u32 val, const struct atyfb_par *par)
{
	if (M64_HAS(LT_LCD_REGS)) {
		aty_st_le32(lt_lcd_regs[index], val, par);
	} else {
		unsigned long temp;

		/* write addr byte */
		temp = aty_ld_le32(LCD_INDEX, par);
		aty_st_le32(LCD_INDEX, (temp & ~LCD_INDEX_MASK) | index, par);
		/* write the register value */
		aty_st_le32(LCD_DATA, val, par);
	}
}

u32 aty_ld_lcd(int index, const struct atyfb_par *par)
{
	if (M64_HAS(LT_LCD_REGS)) {
		return aty_ld_le32(lt_lcd_regs[index], par);
	} else {
		unsigned long temp;

		/* write addr byte */
		temp = aty_ld_le32(LCD_INDEX, par);
		aty_st_le32(LCD_INDEX, (temp & ~LCD_INDEX_MASK) | index, par);
		/* read the register value */
		return aty_ld_le32(LCD_DATA, par);
	}
}
#endif /* defined(CONFIG_PM) || defined(CONFIG_PMAC_BACKLIGHT) || defined (CONFIG_FB_ATY_GENERIC_LCD) */

#ifdef CONFIG_FB_ATY_GENERIC_LCD
/*
 * ATIReduceRatio --
 *
 * Reduce a fraction by factoring out the largest common divider of the
 * fraction's numerator and denominator.
 */
static void ATIReduceRatio(int *Numerator, int *Denominator)
{
    int Multiplier, Divider, Remainder;

    Multiplier = *Numerator;
    Divider = *Denominator;

    while ((Remainder = Multiplier % Divider))
    {
        Multiplier = Divider;
        Divider = Remainder;
    }

    *Numerator /= Divider;
    *Denominator /= Divider;
}
#endif
    /*
     *  The Hardware parameters for each card
     */

struct aty_cmap_regs {
	u8 windex;
	u8 lut;
	u8 mask;
	u8 rindex;
	u8 cntl;
};

struct pci_mmap_map {
	unsigned long voff;
	unsigned long poff;
	unsigned long size;
	unsigned long prot_flag;
	unsigned long prot_mask;
};

static struct fb_fix_screeninfo atyfb_fix __devinitdata = {
	.id		= "ATY Mach64",
	.type		= FB_TYPE_PACKED_PIXELS,
	.visual		= FB_VISUAL_PSEUDOCOLOR,
	.xpanstep	= 8,
	.ypanstep	= 1,
};

    /*
     *  Frame buffer device API
     */

static int atyfb_open(struct fb_info *info, int user);
static int atyfb_release(struct fb_info *info, int user);
static int atyfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
static int atyfb_set_par(struct fb_info *info);
static int atyfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	u_int transp, struct fb_info *info);
static int atyfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);
static int atyfb_blank(int blank, struct fb_info *info);
static int atyfb_ioctl(struct inode *inode, struct file *file, u_int cmd,
	u_long arg, struct fb_info *info);
extern void atyfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
extern void atyfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
extern void atyfb_imageblit(struct fb_info *info, const struct fb_image *image);
#ifdef __sparc__
static int atyfb_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma);
#endif
static int atyfb_sync(struct fb_info *info);

    /*
     *  Internal routines
     */

static int aty_init(struct fb_info *info, const char *name);
#ifdef CONFIG_ATARI
static int store_video_par(char *videopar, unsigned char m64_num);
#endif

static struct crtc saved_crtc;
static union aty_pll saved_pll;
static void aty_get_crtc(const struct atyfb_par *par, struct crtc *crtc);

static void aty_set_crtc(const struct atyfb_par *par, const struct crtc *crtc);
static int aty_var_to_crtc(const struct fb_info *info, const struct fb_var_screeninfo *var, struct crtc *crtc);
static int aty_crtc_to_var(const struct crtc *crtc, struct fb_var_screeninfo *var);
static void set_off_pitch(struct atyfb_par *par, const struct fb_info *info);
#ifdef CONFIG_PPC
static int read_aty_sense(const struct atyfb_par *par);
#endif


    /*
     *  Interface used by the world
     */

static struct fb_var_screeninfo default_var = {
	/* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
	640, 480, 640, 480, 0, 0, 8, 0,
	{0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
	0, 0, -1, -1, 0, 39722, 48, 16, 33, 10, 96, 2,
	0, FB_VMODE_NONINTERLACED
};

static struct fb_videomode defmode = {
	/* 640x480 @ 60 Hz, 31.5 kHz hsync */
	NULL, 60, 640, 480, 39721, 40, 24, 32, 11, 96, 2,
	0, FB_VMODE_NONINTERLACED
};

static struct fb_ops atyfb_ops = {
	.owner		= THIS_MODULE,
	.fb_open	= atyfb_open,
	.fb_release	= atyfb_release,
	.fb_check_var	= atyfb_check_var,
	.fb_set_par	= atyfb_set_par,
	.fb_setcolreg	= atyfb_setcolreg,
	.fb_pan_display	= atyfb_pan_display,
	.fb_blank	= atyfb_blank,
	.fb_ioctl	= atyfb_ioctl,
	.fb_fillrect	= atyfb_fillrect,
	.fb_copyarea	= atyfb_copyarea,
	.fb_imageblit	= atyfb_imageblit,
#ifdef __sparc__
	.fb_mmap	= atyfb_mmap,
#endif
	.fb_sync	= atyfb_sync,
};

static int noaccel;
#ifdef CONFIG_MTRR
static int nomtrr;
#endif
static int vram;
static int pll;
static int mclk;
static int xclk;
static int comp_sync __initdata = -1;
static char *mode;

#ifdef CONFIG_PPC
static int default_vmode __initdata = VMODE_CHOOSE;
static int default_cmode __initdata = CMODE_CHOOSE;

module_param_named(vmode, default_vmode, int, 0);
MODULE_PARM_DESC(vmode, "int: video mode for mac");
module_param_named(cmode, default_cmode, int, 0);
MODULE_PARM_DESC(cmode, "int: color mode for mac");
#endif

#ifdef CONFIG_ATARI
static unsigned int mach64_count __initdata = 0;
static unsigned long phys_vmembase[FB_MAX] __initdata = { 0, };
static unsigned long phys_size[FB_MAX] __initdata = { 0, };
static unsigned long phys_guiregbase[FB_MAX] __initdata = { 0, };
#endif

/* top -> down is an evolution of mach64 chipset, any corrections? */
#define ATI_CHIP_88800GX   (M64F_GX)
#define ATI_CHIP_88800CX   (M64F_GX)

#define ATI_CHIP_264CT     (M64F_CT | M64F_INTEGRATED | M64F_CT_BUS | M64F_MAGIC_FIFO)
#define ATI_CHIP_264ET     (M64F_CT | M64F_INTEGRATED | M64F_CT_BUS | M64F_MAGIC_FIFO)

#define ATI_CHIP_264VT     (M64F_VT | M64F_INTEGRATED | M64F_VT_BUS | M64F_MAGIC_FIFO)
#define ATI_CHIP_264GT     (M64F_GT | M64F_INTEGRATED               | M64F_MAGIC_FIFO | M64F_EXTRA_BRIGHT)

#define ATI_CHIP_264VTB    (M64F_VT | M64F_INTEGRATED | M64F_VT_BUS | M64F_GTB_DSP)
#define ATI_CHIP_264VT3    (M64F_VT | M64F_INTEGRATED | M64F_VT_BUS | M64F_GTB_DSP | M64F_SDRAM_MAGIC_PLL)
#define ATI_CHIP_264VT4    (M64F_VT | M64F_INTEGRATED               | M64F_GTB_DSP)

#define ATI_CHIP_264LT     (M64F_GT | M64F_INTEGRATED               | M64F_GTB_DSP)

/* make sets shorter */
#define ATI_MODERN_SET     (M64F_GT | M64F_INTEGRATED               | M64F_GTB_DSP | M64F_EXTRA_BRIGHT)

#define ATI_CHIP_264GTB    (ATI_MODERN_SET | M64F_SDRAM_MAGIC_PLL)
/*#define ATI_CHIP_264GTDVD  ?*/
#define ATI_CHIP_264LTG    (ATI_MODERN_SET | M64F_SDRAM_MAGIC_PLL)

#define ATI_CHIP_264GT2C   (ATI_MODERN_SET | M64F_SDRAM_MAGIC_PLL | M64F_HW_TRIPLE)
#define ATI_CHIP_264GTPRO  (ATI_MODERN_SET | M64F_SDRAM_MAGIC_PLL | M64F_HW_TRIPLE | M64F_FIFO_32 | M64F_RESET_3D)
#define ATI_CHIP_264LTPRO  (ATI_MODERN_SET | M64F_HW_TRIPLE | M64F_FIFO_32 | M64F_RESET_3D)

#define ATI_CHIP_264XL     (ATI_MODERN_SET | M64F_HW_TRIPLE | M64F_FIFO_32 | M64F_RESET_3D | M64F_XL_DLL | M64F_MFB_FORCE_4)
#define ATI_CHIP_MOBILITY  (ATI_MODERN_SET | M64F_HW_TRIPLE | M64F_FIFO_32 | M64F_RESET_3D | M64F_XL_DLL | M64F_MFB_FORCE_4 | M64F_MOBIL_BUS)

static struct {
	u16 pci_id;
	const char *name;
	int pll, mclk, xclk;
	u32 features;
} aty_chips[] __devinitdata = {
#ifdef CONFIG_FB_ATY_GX
	/* Mach64 GX */
	{ PCI_CHIP_MACH64GX, "ATI888GX00 (Mach64 GX)", 135, 50, 50, ATI_CHIP_88800GX },
	{ PCI_CHIP_MACH64CX, "ATI888CX00 (Mach64 CX)", 135, 50, 50, ATI_CHIP_88800CX },
#endif /* CONFIG_FB_ATY_GX */

#ifdef CONFIG_FB_ATY_CT
	{ PCI_CHIP_MACH64CT, "ATI264CT (Mach64 CT)", 135, 60, 60, ATI_CHIP_264CT },
	{ PCI_CHIP_MACH64ET, "ATI264ET (Mach64 ET)", 135, 60, 60, ATI_CHIP_264ET },
	{ PCI_CHIP_MACH64VT, "ATI264VT? (Mach64 VT)", 170, 67, 67, ATI_CHIP_264VT },
	{ PCI_CHIP_MACH64GT, "3D RAGE (Mach64 GT)", 135, 63, 63, ATI_CHIP_264GT },
	/* FIXME { ...ATI_264GU, maybe ATI_CHIP_264GTDVD }, */
	{ PCI_CHIP_MACH64GU, "3D RAGE II+ (Mach64 GTB)", 200, 67, 67, ATI_CHIP_264GTB  },
	{ PCI_CHIP_MACH64VU, "ATI264VTB (Mach64 VU)", 200, 67, 67, ATI_CHIP_264VT3 },

	{ PCI_CHIP_MACH64LT, "3D RAGE LT (Mach64 LT)", 135, 63, 63, ATI_CHIP_264LT },
	 /* FIXME chipset maybe ATI_CHIP_264LTPRO ? */
	{ PCI_CHIP_MACH64LG, "3D RAGE LT-G (Mach64 LG)", 230, 63, 63, ATI_CHIP_264LTG | M64F_LT_LCD_REGS | M64F_G3_PB_1024x768 },

	{ PCI_CHIP_MACH64VV, "ATI264VT4 (Mach64 VV)", 230, 83, 83, ATI_CHIP_264VT4 },

	{ PCI_CHIP_MACH64GV, "3D RAGE IIC (Mach64 GV, PCI)", 230, 83, 83, ATI_CHIP_264GT2C },
	{ PCI_CHIP_MACH64GW, "3D RAGE IIC (Mach64 GW, AGP)", 230, 83, 83, ATI_CHIP_264GT2C },
	{ PCI_CHIP_MACH64GY, "3D RAGE IIC (Mach64 GY, PCI)", 230, 83, 83, ATI_CHIP_264GT2C },
	{ PCI_CHIP_MACH64GZ, "3D RAGE IIC (Mach64 GZ, AGP)", 230, 83, 83, ATI_CHIP_264GT2C },

	{ PCI_CHIP_MACH64GB, "3D RAGE PRO (Mach64 GB, BGA, AGP)", 230, 100, 100, ATI_CHIP_264GTPRO },
	{ PCI_CHIP_MACH64GD, "3D RAGE PRO (Mach64 GD, BGA, AGP 1x)", 230, 100, 100, ATI_CHIP_264GTPRO },
	{ PCI_CHIP_MACH64GI, "3D RAGE PRO (Mach64 GI, BGA, PCI)", 230, 100, 100, ATI_CHIP_264GTPRO | M64F_MAGIC_VRAM_SIZE },
	{ PCI_CHIP_MACH64GP, "3D RAGE PRO (Mach64 GP, PQFP, PCI)", 230, 100, 100, ATI_CHIP_264GTPRO },
	{ PCI_CHIP_MACH64GQ, "3D RAGE PRO (Mach64 GQ, PQFP, PCI, limited 3D)", 230, 100, 100, ATI_CHIP_264GTPRO },

	{ PCI_CHIP_MACH64LB, "3D RAGE LT PRO (Mach64 LB, AGP)", 236, 75, 100, ATI_CHIP_264LTPRO },
	{ PCI_CHIP_MACH64LD, "3D RAGE LT PRO (Mach64 LD, AGP)", 230, 100, 100, ATI_CHIP_264LTPRO },
	{ PCI_CHIP_MACH64LI, "3D RAGE LT PRO (Mach64 LI, PCI)", 230, 100, 100, ATI_CHIP_264LTPRO | M64F_G3_PB_1_1 | M64F_G3_PB_1024x768 },
	{ PCI_CHIP_MACH64LP, "3D RAGE LT PRO (Mach64 LP, PCI)", 230, 100, 100, ATI_CHIP_264LTPRO },
	{ PCI_CHIP_MACH64LQ, "3D RAGE LT PRO (Mach64 LQ, PCI)", 230, 100, 100, ATI_CHIP_264LTPRO },

	{ PCI_CHIP_MACH64GM, "3D RAGE XL (Mach64 GM, AGP)", 230, 83, 63, ATI_CHIP_264XL },
	{ PCI_CHIP_MACH64GN, "3D RAGE XL (Mach64 GN, AGP)", 230, 83, 63, ATI_CHIP_264XL },
	{ PCI_CHIP_MACH64GO, "3D RAGE XL (Mach64 GO, PCI-66/BGA)", 230, 83, 63, ATI_CHIP_264XL },
	{ PCI_CHIP_MACH64GR, "3D RAGE XL (Mach64 GR, PCI-33MHz)", 230, 83, 63, ATI_CHIP_264XL },
	{ PCI_CHIP_MACH64GL, "3D RAGE XL (Mach64 GL, PCI)", 230, 83, 63, ATI_CHIP_264XL },
	{ PCI_CHIP_MACH64GS, "3D RAGE XL (Mach64 GS, PCI)", 230, 83, 63, ATI_CHIP_264XL },

	{ PCI_CHIP_MACH64LM, "3D RAGE Mobility P/M (Mach64 LM, AGP 2x)", 230, 83, 125, ATI_CHIP_MOBILITY },
	{ PCI_CHIP_MACH64LN, "3D RAGE Mobility L (Mach64 LN, AGP 2x)", 230, 83, 125, ATI_CHIP_MOBILITY },
	{ PCI_CHIP_MACH64LR, "3D RAGE Mobility P/M (Mach64 LR, PCI)", 230, 83, 125, ATI_CHIP_MOBILITY },
	{ PCI_CHIP_MACH64LS, "3D RAGE Mobility L (Mach64 LS, PCI)", 230, 83, 125, ATI_CHIP_MOBILITY },
#endif /* CONFIG_FB_ATY_CT */
};

/* can not fail */
static int __devinit correct_chipset(struct atyfb_par *par)
{
	u8 rev;
	u16 type;
	u32 chip_id;
	const char *name;
	int i;

	for (i = sizeof(aty_chips) / sizeof(*aty_chips) - 1; i >= 0; i--)
		if (par->pci_id == aty_chips[i].pci_id)
			break;

	name = aty_chips[i].name;
	par->pll_limits.pll_max = aty_chips[i].pll;
	par->pll_limits.mclk = aty_chips[i].mclk;
	par->pll_limits.xclk = aty_chips[i].xclk;
	par->features = aty_chips[i].features;

	chip_id = aty_ld_le32(CONFIG_CHIP_ID, par);
	type = chip_id & CFG_CHIP_TYPE;
	rev = (chip_id & CFG_CHIP_REV) >> 24;

	switch(par->pci_id) {
#ifdef CONFIG_FB_ATY_GX
	case PCI_CHIP_MACH64GX:
		if(type != 0x00d7)
			return -ENODEV;
		break;
	case PCI_CHIP_MACH64CX:
		if(type != 0x0057)
			return -ENODEV;
		break;
#endif
#ifdef CONFIG_FB_ATY_CT
	case PCI_CHIP_MACH64VT:
		rev &= 0xc7;
		if(rev == 0x00) {
			name = "ATI264VTA3 (Mach64 VT)";
			par->pll_limits.pll_max = 170;
			par->pll_limits.mclk = 67;
			par->pll_limits.xclk = 67;
			par->features = ATI_CHIP_264VT;
		} else if(rev == 0x40) {
			name = "ATI264VTA4 (Mach64 VT)";
			par->pll_limits.pll_max = 200;
			par->pll_limits.mclk = 67;
			par->pll_limits.xclk = 67;
			par->features = ATI_CHIP_264VT | M64F_MAGIC_POSTDIV;
		} else {
			name = "ATI264VTB (Mach64 VT)";
			par->pll_limits.pll_max = 200;
			par->pll_limits.mclk = 67;
			par->pll_limits.xclk = 67;
			par->features = ATI_CHIP_264VTB;
		}
		break;
	case PCI_CHIP_MACH64GT:
		rev &= 0x07;
		if(rev == 0x01) {
			par->pll_limits.pll_max = 170;
			par->pll_limits.mclk = 67;
			par->pll_limits.xclk = 67;
			par->features = ATI_CHIP_264GTB;
		} else if(rev == 0x02) {
			par->pll_limits.pll_max = 200;
			par->pll_limits.mclk = 67;
			par->pll_limits.xclk = 67;
			par->features = ATI_CHIP_264GTB;
		}
		break;
#endif
	}

	PRINTKI("%s [0x%04x rev 0x%02x]\n", name, type, rev);
	return 0;
}

static char ram_dram[] __devinitdata = "DRAM";
static char ram_resv[] __devinitdata = "RESV";
#ifdef CONFIG_FB_ATY_GX
static char ram_vram[] __devinitdata = "VRAM";
#endif /* CONFIG_FB_ATY_GX */
#ifdef CONFIG_FB_ATY_CT
static char ram_edo[] __devinitdata = "EDO";
static char ram_sdram[] __devinitdata = "SDRAM (1:1)";
static char ram_sgram[] __devinitdata = "SGRAM (1:1)";
static char ram_sdram32[] __devinitdata = "SDRAM (2:1) (32-bit)";
static char ram_off[] __devinitdata = "OFF";
#endif /* CONFIG_FB_ATY_CT */


static u32 pseudo_palette[17];

#ifdef CONFIG_FB_ATY_GX
static char *aty_gx_ram[8] __devinitdata = {
	ram_dram, ram_vram, ram_vram, ram_dram,
	ram_dram, ram_vram, ram_vram, ram_resv
};
#endif /* CONFIG_FB_ATY_GX */

#ifdef CONFIG_FB_ATY_CT
static char *aty_ct_ram[8] __devinitdata = {
	ram_off, ram_dram, ram_edo, ram_edo,
	ram_sdram, ram_sgram, ram_sdram32, ram_resv
};
#endif /* CONFIG_FB_ATY_CT */

static u32 atyfb_get_pixclock(struct fb_var_screeninfo *var, struct atyfb_par *par)
{
	u32 pixclock = var->pixclock;
#ifdef CONFIG_FB_ATY_GENERIC_LCD
	u32 lcd_on_off;
	par->pll.ct.xres = 0;
	if (par->lcd_table != 0) {
		lcd_on_off = aty_ld_lcd(LCD_GEN_CNTL, par);
		if(lcd_on_off & LCD_ON) {
			par->pll.ct.xres = var->xres;
			pixclock = par->lcd_pixclock;
		}
	}
#endif
	return pixclock;
}

#if defined(CONFIG_PPC)

/*
 *  Apple monitor sense
 */

static int __init read_aty_sense(const struct atyfb_par *par)
{
	int sense, i;

	aty_st_le32(GP_IO, 0x31003100, par); /* drive outputs high */
	__delay(200);
	aty_st_le32(GP_IO, 0, par); /* turn off outputs */
	__delay(2000);
	i = aty_ld_le32(GP_IO, par); /* get primary sense value */
	sense = ((i & 0x3000) >> 3) | (i & 0x100);

	/* drive each sense line low in turn and collect the other 2 */
	aty_st_le32(GP_IO, 0x20000000, par); /* drive A low */
	__delay(2000);
	i = aty_ld_le32(GP_IO, par);
	sense |= ((i & 0x1000) >> 7) | ((i & 0x100) >> 4);
	aty_st_le32(GP_IO, 0x20002000, par); /* drive A high again */
	__delay(200);

	aty_st_le32(GP_IO, 0x10000000, par); /* drive B low */
	__delay(2000);
	i = aty_ld_le32(GP_IO, par);
	sense |= ((i & 0x2000) >> 10) | ((i & 0x100) >> 6);
	aty_st_le32(GP_IO, 0x10001000, par); /* drive B high again */
	__delay(200);

	aty_st_le32(GP_IO, 0x01000000, par); /* drive C low */
	__delay(2000);
	sense |= (aty_ld_le32(GP_IO, par) & 0x3000) >> 12;
	aty_st_le32(GP_IO, 0, par); /* turn off outputs */
	return sense;
}

#endif /* defined(CONFIG_PPC) */

/* ------------------------------------------------------------------------- */

/*
 *  CRTC programming
 */

static void aty_get_crtc(const struct atyfb_par *par, struct crtc *crtc)
{
#ifdef CONFIG_FB_ATY_GENERIC_LCD
	if (par->lcd_table != 0) {
		if(!M64_HAS(LT_LCD_REGS)) {
		    crtc->lcd_index = aty_ld_le32(LCD_INDEX, par);
		    aty_st_le32(LCD_INDEX, crtc->lcd_index, par);
		}
		crtc->lcd_config_panel = aty_ld_lcd(CONFIG_PANEL, par);
		crtc->lcd_gen_cntl = aty_ld_lcd(LCD_GEN_CNTL, par);


		/* switch to non shadow registers */
		aty_st_lcd(LCD_GEN_CNTL, crtc->lcd_gen_cntl &
                    ~(CRTC_RW_SELECT | SHADOW_EN | SHADOW_RW_EN), par);

		/* save stretching */
		crtc->horz_stretching = aty_ld_lcd(HORZ_STRETCHING, par);
		crtc->vert_stretching = aty_ld_lcd(VERT_STRETCHING, par);
		if (!M64_HAS(LT_LCD_REGS))
			crtc->ext_vert_stretch = aty_ld_lcd(EXT_VERT_STRETCH, par);
	}
#endif
	crtc->h_tot_disp = aty_ld_le32(CRTC_H_TOTAL_DISP, par);
	crtc->h_sync_strt_wid = aty_ld_le32(CRTC_H_SYNC_STRT_WID, par);
	crtc->v_tot_disp = aty_ld_le32(CRTC_V_TOTAL_DISP, par);
	crtc->v_sync_strt_wid = aty_ld_le32(CRTC_V_SYNC_STRT_WID, par);
	crtc->vline_crnt_vline = aty_ld_le32(CRTC_VLINE_CRNT_VLINE, par);
	crtc->off_pitch = aty_ld_le32(CRTC_OFF_PITCH, par);
	crtc->gen_cntl = aty_ld_le32(CRTC_GEN_CNTL, par);

#ifdef CONFIG_FB_ATY_GENERIC_LCD
	if (par->lcd_table != 0) {
		/* switch to shadow registers */
		aty_st_lcd(LCD_GEN_CNTL, (crtc->lcd_gen_cntl & ~CRTC_RW_SELECT) |
			SHADOW_EN | SHADOW_RW_EN, par);

		crtc->shadow_h_tot_disp = aty_ld_le32(CRTC_H_TOTAL_DISP, par);
		crtc->shadow_h_sync_strt_wid = aty_ld_le32(CRTC_H_SYNC_STRT_WID, par);
		crtc->shadow_v_tot_disp = aty_ld_le32(CRTC_V_TOTAL_DISP, par);
		crtc->shadow_v_sync_strt_wid = aty_ld_le32(CRTC_V_SYNC_STRT_WID, par);

		aty_st_le32(LCD_GEN_CNTL, crtc->lcd_gen_cntl, par);
	}
#endif /* CONFIG_FB_ATY_GENERIC_LCD */
}

static void aty_set_crtc(const struct atyfb_par *par, const struct crtc *crtc)
{
#ifdef CONFIG_FB_ATY_GENERIC_LCD
	if (par->lcd_table != 0) {
		/* stop CRTC */
		aty_st_le32(CRTC_GEN_CNTL, crtc->gen_cntl & ~(CRTC_EXT_DISP_EN | CRTC_EN), par);

		/* update non-shadow registers first */
		aty_st_lcd(CONFIG_PANEL, crtc->lcd_config_panel, par);
		aty_st_lcd(LCD_GEN_CNTL, crtc->lcd_gen_cntl &
			~(CRTC_RW_SELECT | SHADOW_EN | SHADOW_RW_EN), par);

		/* temporarily disable stretching */
		aty_st_lcd(HORZ_STRETCHING,
			crtc->horz_stretching &
			~(HORZ_STRETCH_MODE | HORZ_STRETCH_EN), par);
		aty_st_lcd(VERT_STRETCHING,
			crtc->vert_stretching &
			~(VERT_STRETCH_RATIO1 | VERT_STRETCH_RATIO2 |
			VERT_STRETCH_USE0 | VERT_STRETCH_EN), par);
	}
#endif
	/* turn off CRT */
	aty_st_le32(CRTC_GEN_CNTL, crtc->gen_cntl & ~CRTC_EN, par);

	DPRINTK("setting up CRTC\n");
	DPRINTK("set primary CRT to %ix%i %c%c composite %c\n",
	    ((((crtc->h_tot_disp>>16) & 0xff) + 1)<<3), (((crtc->v_tot_disp>>16) & 0x7ff) + 1),
	    (crtc->h_sync_strt_wid & 0x200000)?'N':'P', (crtc->v_sync_strt_wid & 0x200000)?'N':'P',
	    (crtc->gen_cntl & CRTC_CSYNC_EN)?'P':'N');

	DPRINTK("CRTC_H_TOTAL_DISP: %x\n",crtc->h_tot_disp);
	DPRINTK("CRTC_H_SYNC_STRT_WID: %x\n",crtc->h_sync_strt_wid);
	DPRINTK("CRTC_V_TOTAL_DISP: %x\n",crtc->v_tot_disp);
	DPRINTK("CRTC_V_SYNC_STRT_WID: %x\n",crtc->v_sync_strt_wid);
	DPRINTK("CRTC_OFF_PITCH: %x\n", crtc->off_pitch);
	DPRINTK("CRTC_VLINE_CRNT_VLINE: %x\n", crtc->vline_crnt_vline);
	DPRINTK("CRTC_GEN_CNTL: %x\n",crtc->gen_cntl);

	aty_st_le32(CRTC_H_TOTAL_DISP, crtc->h_tot_disp, par);
	aty_st_le32(CRTC_H_SYNC_STRT_WID, crtc->h_sync_strt_wid, par);
	aty_st_le32(CRTC_V_TOTAL_DISP, crtc->v_tot_disp, par);
	aty_st_le32(CRTC_V_SYNC_STRT_WID, crtc->v_sync_strt_wid, par);
	aty_st_le32(CRTC_OFF_PITCH, crtc->off_pitch, par);
	aty_st_le32(CRTC_VLINE_CRNT_VLINE, crtc->vline_crnt_vline, par);

	aty_st_le32(CRTC_GEN_CNTL, crtc->gen_cntl, par);
#if 0
	FIXME
	if (par->accel_flags & FB_ACCELF_TEXT)
		aty_init_engine(par, info);
#endif
#ifdef CONFIG_FB_ATY_GENERIC_LCD
	/* after setting the CRTC registers we should set the LCD registers. */
	if (par->lcd_table != 0) {
		/* switch to shadow registers */
		aty_st_lcd(LCD_GEN_CNTL, (crtc->lcd_gen_cntl & ~CRTC_RW_SELECT) |
			(SHADOW_EN | SHADOW_RW_EN), par);

		DPRINTK("set secondary CRT to %ix%i %c%c\n",
		    ((((crtc->shadow_h_tot_disp>>16) & 0xff) + 1)<<3), (((crtc->shadow_v_tot_disp>>16) & 0x7ff) + 1),
		    (crtc->shadow_h_sync_strt_wid & 0x200000)?'N':'P', (crtc->shadow_v_sync_strt_wid & 0x200000)?'N':'P');

		DPRINTK("SHADOW CRTC_H_TOTAL_DISP: %x\n", crtc->shadow_h_tot_disp);
		DPRINTK("SHADOW CRTC_H_SYNC_STRT_WID: %x\n", crtc->shadow_h_sync_strt_wid);
		DPRINTK("SHADOW CRTC_V_TOTAL_DISP: %x\n", crtc->shadow_v_tot_disp);
		DPRINTK("SHADOW CRTC_V_SYNC_STRT_WID: %x\n", crtc->shadow_v_sync_strt_wid);

		aty_st_le32(CRTC_H_TOTAL_DISP, crtc->shadow_h_tot_disp, par);
		aty_st_le32(CRTC_H_SYNC_STRT_WID, crtc->shadow_h_sync_strt_wid, par);
		aty_st_le32(CRTC_V_TOTAL_DISP, crtc->shadow_v_tot_disp, par);
		aty_st_le32(CRTC_V_SYNC_STRT_WID, crtc->shadow_v_sync_strt_wid, par);

		/* restore CRTC selection & shadow state and enable stretching */
		DPRINTK("LCD_GEN_CNTL: %x\n", crtc->lcd_gen_cntl);
		DPRINTK("HORZ_STRETCHING: %x\n", crtc->horz_stretching);
		DPRINTK("VERT_STRETCHING: %x\n", crtc->vert_stretching);
		if(!M64_HAS(LT_LCD_REGS))
		    DPRINTK("EXT_VERT_STRETCH: %x\n", crtc->ext_vert_stretch);

		aty_st_lcd(LCD_GEN_CNTL, crtc->lcd_gen_cntl, par);
		aty_st_lcd(HORZ_STRETCHING, crtc->horz_stretching, par);
		aty_st_lcd(VERT_STRETCHING, crtc->vert_stretching, par);
		if(!M64_HAS(LT_LCD_REGS)) {
		    aty_st_lcd(EXT_VERT_STRETCH, crtc->ext_vert_stretch, par);
		    aty_ld_le32(LCD_INDEX, par);
		    aty_st_le32(LCD_INDEX, crtc->lcd_index, par);
		}
	}
#endif /* CONFIG_FB_ATY_GENERIC_LCD */
}

static int aty_var_to_crtc(const struct fb_info *info,
	const struct fb_var_screeninfo *var, struct crtc *crtc)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	u32 xres, yres, vxres, vyres, xoffset, yoffset, bpp;
	u32 sync, vmode, vdisplay;
	u32 h_total, h_disp, h_sync_strt, h_sync_end, h_sync_dly, h_sync_wid, h_sync_pol;
	u32 v_total, v_disp, v_sync_strt, v_sync_end, v_sync_wid, v_sync_pol, c_sync;
	u32 pix_width, dp_pix_width, dp_chain_mask;

	/* input */
	xres = var->xres;
	yres = var->yres;
	vxres = var->xres_virtual;
	vyres = var->yres_virtual;
	xoffset = var->xoffset;
	yoffset = var->yoffset;
	bpp = var->bits_per_pixel;
	if (bpp == 16)
		bpp = (var->green.length == 5) ? 15 : 16;
	sync = var->sync;
	vmode = var->vmode;

	/* convert (and round up) and validate */
	if (vxres < xres + xoffset)
		vxres = xres + xoffset;
	h_disp = xres;

	if (vyres < yres + yoffset)
		vyres = yres + yoffset;
	v_disp = yres;

	if (bpp <= 8) {
		bpp = 8;
		pix_width = CRTC_PIX_WIDTH_8BPP;
		dp_pix_width =
		    HOST_8BPP | SRC_8BPP | DST_8BPP |
		    BYTE_ORDER_LSB_TO_MSB;
		dp_chain_mask = DP_CHAIN_8BPP;
	} else if (bpp <= 15) {
		bpp = 16;
		pix_width = CRTC_PIX_WIDTH_15BPP;
		dp_pix_width = HOST_15BPP | SRC_15BPP | DST_15BPP |
		    BYTE_ORDER_LSB_TO_MSB;
		dp_chain_mask = DP_CHAIN_15BPP;
	} else if (bpp <= 16) {
		bpp = 16;
		pix_width = CRTC_PIX_WIDTH_16BPP;
		dp_pix_width = HOST_16BPP | SRC_16BPP | DST_16BPP |
		    BYTE_ORDER_LSB_TO_MSB;
		dp_chain_mask = DP_CHAIN_16BPP;
	} else if (bpp <= 24 && M64_HAS(INTEGRATED)) {
		bpp = 24;
		pix_width = CRTC_PIX_WIDTH_24BPP;
		dp_pix_width =
		    HOST_8BPP | SRC_8BPP | DST_8BPP |
		    BYTE_ORDER_LSB_TO_MSB;
		dp_chain_mask = DP_CHAIN_24BPP;
	} else if (bpp <= 32) {
		bpp = 32;
		pix_width = CRTC_PIX_WIDTH_32BPP;
		dp_pix_width = HOST_32BPP | SRC_32BPP | DST_32BPP |
		    BYTE_ORDER_LSB_TO_MSB;
		dp_chain_mask = DP_CHAIN_32BPP;
	} else
		FAIL("invalid bpp");

	if (vxres * vyres * bpp / 8 > info->fix.smem_len)
		FAIL("not enough video RAM");

	h_sync_pol = sync & FB_SYNC_HOR_HIGH_ACT ? 0 : 1;
	v_sync_pol = sync & FB_SYNC_VERT_HIGH_ACT ? 0 : 1;

	if((xres > 1600) || (yres > 1200)) {
		FAIL("MACH64 chips are designed for max 1600x1200\n"
		"select anoter resolution.");
	}
	h_sync_strt = h_disp + var->right_margin;
	h_sync_end = h_sync_strt + var->hsync_len;
	h_sync_dly  = var->right_margin & 7;
	h_total = h_sync_end + h_sync_dly + var->left_margin;

	v_sync_strt = v_disp + var->lower_margin;
	v_sync_end = v_sync_strt + var->vsync_len;
	v_total = v_sync_end + var->upper_margin;

#ifdef CONFIG_FB_ATY_GENERIC_LCD
	if (par->lcd_table != 0) {
		if(!M64_HAS(LT_LCD_REGS)) {
		    u32 lcd_index = aty_ld_le32(LCD_INDEX, par);
		    crtc->lcd_index = lcd_index &
			~(LCD_INDEX_MASK | LCD_DISPLAY_DIS | LCD_SRC_SEL | CRTC2_DISPLAY_DIS);
		    aty_st_le32(LCD_INDEX, lcd_index, par);
		}

		if (!M64_HAS(MOBIL_BUS))
			crtc->lcd_index |= CRTC2_DISPLAY_DIS;

		crtc->lcd_config_panel = aty_ld_lcd(CONFIG_PANEL, par) | 0x4000;
		crtc->lcd_gen_cntl = aty_ld_lcd(LCD_GEN_CNTL, par) & ~CRTC_RW_SELECT;

		crtc->lcd_gen_cntl &=
			~(HORZ_DIVBY2_EN | DIS_HOR_CRT_DIVBY2 | TVCLK_PM_EN |
			/*VCLK_DAC_PM_EN | USE_SHADOWED_VEND |*/
			USE_SHADOWED_ROWCUR | SHADOW_EN | SHADOW_RW_EN);
		crtc->lcd_gen_cntl |= DONT_SHADOW_VPAR | LOCK_8DOT;

		if((crtc->lcd_gen_cntl & LCD_ON) &&
			((xres > par->lcd_width) || (yres > par->lcd_height))) {
			/* We cannot display the mode on the LCD. If the CRT is enabled
			   we can turn off the LCD.
			   If the CRT is off, it isn't a good idea to switch it on; we don't
			   know if one is connected. So it's better to fail then.
			 */
			if (crtc->lcd_gen_cntl & CRT_ON) {
				PRINTKI("Disable lcd panel, because video mode does not fit.\n");
				crtc->lcd_gen_cntl &= ~LCD_ON;
				/*aty_st_lcd(LCD_GEN_CNTL, crtc->lcd_gen_cntl, par);*/
			} else {
				FAIL("Video mode exceeds size of lcd panel.\nConnect this computer to a conventional monitor if you really need this mode.");
			}
		}
	}

	if ((par->lcd_table != 0) && (crtc->lcd_gen_cntl & LCD_ON)) {
		int VScan = 1;
		/* bpp -> bytespp, 1,4 -> 0; 8 -> 2; 15,16 -> 1; 24 -> 6; 32 -> 5
		const u8 DFP_h_sync_dly_LT[] = { 0, 2, 1, 6, 5 };
		const u8 ADD_to_strt_wid_and_dly_LT_DAC[] = { 0, 5, 6, 9, 9, 12, 12 };  */

		vmode &= ~(FB_VMODE_DOUBLE | FB_VMODE_INTERLACED);

		/* This is horror! When we simulate, say 640x480 on an 800x600
		   lcd monitor, the CRTC should be programmed 800x600 values for
		   the non visible part, but 640x480 for the visible part.
		   This code has been tested on a laptop with it's 1400x1050 lcd
		   monitor and a conventional monitor both switched on.
		   Tested modes: 1280x1024, 1152x864, 1024x768, 800x600,
		    works with little glitches also with DOUBLESCAN modes
		 */
		if (yres < par->lcd_height) {
			VScan = par->lcd_height / yres;
			if(VScan > 1) {
				VScan = 2;
				vmode |= FB_VMODE_DOUBLE;
			}
		}

		h_sync_strt = h_disp + par->lcd_right_margin;
		h_sync_end = h_sync_strt + par->lcd_hsync_len;
		h_sync_dly = /*DFP_h_sync_dly[ ( bpp + 1 ) / 3 ]; */par->lcd_hsync_dly;
		h_total = h_disp + par->lcd_hblank_len;

		v_sync_strt = v_disp + par->lcd_lower_margin / VScan;
		v_sync_end = v_sync_strt + par->lcd_vsync_len / VScan;
		v_total = v_disp + par->lcd_vblank_len / VScan;
	}
#endif /* CONFIG_FB_ATY_GENERIC_LCD */

	h_disp = (h_disp >> 3) - 1;
	h_sync_strt = (h_sync_strt >> 3) - 1;
	h_sync_end = (h_sync_end >> 3) - 1;
	h_total = (h_total >> 3) - 1;
	h_sync_wid = h_sync_end - h_sync_strt;

	FAIL_MAX("h_disp too large", h_disp, 0xff);
	FAIL_MAX("h_sync_strt too large", h_sync_strt, 0x1ff);
	/*FAIL_MAX("h_sync_wid too large", h_sync_wid, 0x1f);*/
	if(h_sync_wid > 0x1f)
		h_sync_wid = 0x1f;
	FAIL_MAX("h_total too large", h_total, 0x1ff);

	if (vmode & FB_VMODE_DOUBLE) {
		v_disp <<= 1;
		v_sync_strt <<= 1;
		v_sync_end <<= 1;
		v_total <<= 1;
	}

	vdisplay = yres;
#ifdef CONFIG_FB_ATY_GENERIC_LCD
	if ((par->lcd_table != 0) && (crtc->lcd_gen_cntl & LCD_ON))
		vdisplay  = par->lcd_height;
#endif

	v_disp--;
	v_sync_strt--;
	v_sync_end--;
	v_total--;
	v_sync_wid = v_sync_end - v_sync_strt;

	FAIL_MAX("v_disp too large", v_disp, 0x7ff);
	FAIL_MAX("v_sync_stsrt too large", v_sync_strt, 0x7ff);
	/*FAIL_MAX("v_sync_wid too large", v_sync_wid, 0x1f);*/
	if(v_sync_wid > 0x1f)
		v_sync_wid = 0x1f;
	FAIL_MAX("v_total too large", v_total, 0x7ff);

	c_sync = sync & FB_SYNC_COMP_HIGH_ACT ? CRTC_CSYNC_EN : 0;

	/* output */
	crtc->vxres = vxres;
	crtc->vyres = vyres;
	crtc->xoffset = xoffset;
	crtc->yoffset = yoffset;
	crtc->bpp = bpp;
	crtc->off_pitch = ((yoffset*vxres+xoffset)*bpp/64) | (vxres<<19);
	crtc->vline_crnt_vline = 0;

	crtc->h_tot_disp = h_total | (h_disp<<16);
	crtc->h_sync_strt_wid = (h_sync_strt & 0xff) | (h_sync_dly<<8) |
		((h_sync_strt & 0x100)<<4) | (h_sync_wid<<16) | (h_sync_pol<<21);
	crtc->v_tot_disp = v_total | (v_disp<<16);
	crtc->v_sync_strt_wid = v_sync_strt | (v_sync_wid<<16) | (v_sync_pol<<21);

	/* crtc->gen_cntl = aty_ld_le32(CRTC_GEN_CNTL, par) & CRTC_PRESERVED_MASK; */
	crtc->gen_cntl = CRTC_EXT_DISP_EN | CRTC_EN | pix_width | c_sync;
	crtc->gen_cntl |= CRTC_VGA_LINEAR;

	/* Enable doublescan mode if requested */
	if (vmode & FB_VMODE_DOUBLE)
		crtc->gen_cntl |= CRTC_DBL_SCAN_EN;
	/* Enable interlaced mode if requested */
	if (vmode & FB_VMODE_INTERLACED)
		crtc->gen_cntl |= CRTC_INTERLACE_EN;
#ifdef CONFIG_FB_ATY_GENERIC_LCD
	if (par->lcd_table != 0) {
		vdisplay = yres;
		if(vmode & FB_VMODE_DOUBLE)
			vdisplay <<= 1;
		if(vmode & FB_VMODE_INTERLACED) {
			vdisplay >>= 1;

			/* The prefered mode for the lcd is not interlaced, so disable it if
			   it was enabled. For doublescan there is no problem, because we can
			   compensate for it in the hardware stretching (we stretch half as much)
			 */
			vmode &= ~FB_VMODE_INTERLACED;
			/*crtc->gen_cntl &= ~CRTC_INTERLACE_EN;*/
		}
		crtc->gen_cntl &= ~(CRTC2_EN | CRTC2_PIX_WIDTH);
		crtc->lcd_gen_cntl &= ~(HORZ_DIVBY2_EN | DIS_HOR_CRT_DIVBY2 |
			/*TVCLK_PM_EN | VCLK_DAC_PM_EN |*/
			USE_SHADOWED_VEND | USE_SHADOWED_ROWCUR | SHADOW_EN | SHADOW_RW_EN);
		crtc->lcd_gen_cntl |= (DONT_SHADOW_VPAR/* | LOCK_8DOT*/);

		/* MOBILITY M1 tested, FIXME: LT */
		crtc->horz_stretching = aty_ld_lcd(HORZ_STRETCHING, par);
		if (!M64_HAS(LT_LCD_REGS))
			crtc->ext_vert_stretch = aty_ld_lcd(EXT_VERT_STRETCH, par) &
				~(AUTO_VERT_RATIO | VERT_STRETCH_MODE | VERT_STRETCH_RATIO3);

		crtc->horz_stretching &=
			~(HORZ_STRETCH_RATIO | HORZ_STRETCH_LOOP | AUTO_HORZ_RATIO |
			HORZ_STRETCH_MODE | HORZ_STRETCH_EN);
		if (xres < par->lcd_width) {
			do {
				/*
				* The horizontal blender misbehaves when HDisplay is less than a
				* a certain threshold (440 for a 1024-wide panel).  It doesn't
				* stretch such modes enough.  Use pixel replication instead of
				* blending to stretch modes that can be made to exactly fit the
				* panel width.  The undocumented "NoLCDBlend" option allows the
				* pixel-replicated mode to be slightly wider or narrower than the
				* panel width.  It also causes a mode that is exactly half as wide
				* as the panel to be pixel-replicated, rather than blended.
				*/
				int HDisplay  = xres & ~7;
				int nStretch  = par->lcd_width / HDisplay;
				int Remainder = par->lcd_width % HDisplay;

				if ((!Remainder && ((nStretch > 2))) ||
					(((HDisplay * 16) / par->lcd_width) < 7)) {
					static const char StretchLoops[] = {10, 12, 13, 15, 16};
					int horz_stretch_loop = -1, BestRemainder;
					int Numerator = HDisplay, Denominator = par->lcd_width;
					int Index = 5;
					ATIReduceRatio(&Numerator, &Denominator);

					BestRemainder = (Numerator * 16) / Denominator;
					while (--Index >= 0) {
						Remainder = ((Denominator - Numerator) * StretchLoops[Index]) %
							Denominator;
						if (Remainder < BestRemainder) {
							horz_stretch_loop = Index;
							if (!(BestRemainder = Remainder))
								break;
						}
					}

					if ((horz_stretch_loop >= 0) && !BestRemainder) {
						int horz_stretch_ratio = 0, Accumulator = 0;
						int reuse_previous = 1;

						Index = StretchLoops[horz_stretch_loop];

						while (--Index >= 0) {
							if (Accumulator > 0)
								horz_stretch_ratio |= reuse_previous;
							else
								Accumulator += Denominator;
							Accumulator -= Numerator;
							reuse_previous <<= 1;
						}

						crtc->horz_stretching |= (HORZ_STRETCH_EN |
							((horz_stretch_loop & HORZ_STRETCH_LOOP) << 16) |
							(horz_stretch_ratio & HORZ_STRETCH_RATIO));
						break;      /* Out of the do { ... } while (0) */
					}
				}

				crtc->horz_stretching |= (HORZ_STRETCH_MODE | HORZ_STRETCH_EN |
					(((HDisplay * (HORZ_STRETCH_BLEND + 1)) / par->lcd_width) & HORZ_STRETCH_BLEND));
			} while (0);
		}

		if (vdisplay < par->lcd_height) {
			crtc->vert_stretching = (VERT_STRETCH_USE0 | VERT_STRETCH_EN |
				(((vdisplay * (VERT_STRETCH_RATIO0 + 1)) / par->lcd_height) & VERT_STRETCH_RATIO0));

			if (!M64_HAS(LT_LCD_REGS) &&
			    xres <= (M64_HAS(MOBIL_BUS)?1024:800))
				crtc->ext_vert_stretch |= VERT_STRETCH_MODE;
		} else {
			/*
			 * Don't use vertical blending if the mode is too wide or not
			 * vertically stretched.
			 */
			crtc->vert_stretching = 0;
		}
		/* copy to shadow crtc */
		crtc->shadow_h_tot_disp = crtc->h_tot_disp;
		crtc->shadow_h_sync_strt_wid = crtc->h_sync_strt_wid;
		crtc->shadow_v_tot_disp = crtc->v_tot_disp;
		crtc->shadow_v_sync_strt_wid = crtc->v_sync_strt_wid;
	}
#endif /* CONFIG_FB_ATY_GENERIC_LCD */

	if (M64_HAS(MAGIC_FIFO)) {
		/* Not VTB/GTB */
		/* FIXME: magic FIFO values */
		crtc->gen_cntl |= (aty_ld_le32(CRTC_GEN_CNTL, par) & CRTC2_PIX_WIDTH);
	}
	crtc->dp_pix_width = dp_pix_width;
	crtc->dp_chain_mask = dp_chain_mask;

	return 0;
}

static int aty_crtc_to_var(const struct crtc *crtc, struct fb_var_screeninfo *var)
{
	u32 xres, yres, bpp, left, right, upper, lower, hslen, vslen, sync;
	u32 h_total, h_disp, h_sync_strt, h_sync_dly, h_sync_wid,
	    h_sync_pol;
	u32 v_total, v_disp, v_sync_strt, v_sync_wid, v_sync_pol, c_sync;
	u32 pix_width;
	u32 double_scan, interlace;

	/* input */
	h_total = crtc->h_tot_disp & 0x1ff;
	h_disp = (crtc->h_tot_disp >> 16) & 0xff;
	h_sync_strt = (crtc->h_sync_strt_wid & 0xff) | ((crtc->h_sync_strt_wid >> 4) & 0x100);
	h_sync_dly = (crtc->h_sync_strt_wid >> 8) & 0x7;
	h_sync_wid = (crtc->h_sync_strt_wid >> 16) & 0x1f;
	h_sync_pol = (crtc->h_sync_strt_wid >> 21) & 0x1;
	v_total = crtc->v_tot_disp & 0x7ff;
	v_disp = (crtc->v_tot_disp >> 16) & 0x7ff;
	v_sync_strt = crtc->v_sync_strt_wid & 0x7ff;
	v_sync_wid = (crtc->v_sync_strt_wid >> 16) & 0x1f;
	v_sync_pol = (crtc->v_sync_strt_wid >> 21) & 0x1;
	c_sync = crtc->gen_cntl & CRTC_CSYNC_EN ? 1 : 0;
	pix_width = crtc->gen_cntl & CRTC_PIX_WIDTH_MASK;
	double_scan = crtc->gen_cntl & CRTC_DBL_SCAN_EN;
	interlace = crtc->gen_cntl & CRTC_INTERLACE_EN;

	/* convert */
	xres = (h_disp + 1) * 8;
	yres = v_disp + 1;
	left = (h_total - h_sync_strt - h_sync_wid) * 8 - h_sync_dly;
	right = (h_sync_strt - h_disp) * 8 + h_sync_dly;
	hslen = h_sync_wid * 8;
	upper = v_total - v_sync_strt - v_sync_wid;
	lower = v_sync_strt - v_disp;
	vslen = v_sync_wid;
	sync = (h_sync_pol ? 0 : FB_SYNC_HOR_HIGH_ACT) |
	    (v_sync_pol ? 0 : FB_SYNC_VERT_HIGH_ACT) |
	    (c_sync ? FB_SYNC_COMP_HIGH_ACT : 0);

	switch (pix_width) {
#if 0
	case CRTC_PIX_WIDTH_4BPP:
		bpp = 4;
		var->red.offset = 0;
		var->red.length = 8;
		var->green.offset = 0;
		var->green.length = 8;
		var->blue.offset = 0;
		var->blue.length = 8;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
#endif
	case CRTC_PIX_WIDTH_8BPP:
		bpp = 8;
		var->red.offset = 0;
		var->red.length = 8;
		var->green.offset = 0;
		var->green.length = 8;
		var->blue.offset = 0;
		var->blue.length = 8;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
	case CRTC_PIX_WIDTH_15BPP:	/* RGB 555 */
		bpp = 16;
		var->red.offset = 10;
		var->red.length = 5;
		var->green.offset = 5;
		var->green.length = 5;
		var->blue.offset = 0;
		var->blue.length = 5;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
	case CRTC_PIX_WIDTH_16BPP:	/* RGB 565 */
		bpp = 16;
		var->red.offset = 11;
		var->red.length = 5;
		var->green.offset = 5;
		var->green.length = 6;
		var->blue.offset = 0;
		var->blue.length = 5;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
	case CRTC_PIX_WIDTH_24BPP:	/* RGB 888 */
		bpp = 24;
		var->red.offset = 16;
		var->red.length = 8;
		var->green.offset = 8;
		var->green.length = 8;
		var->blue.offset = 0;
		var->blue.length = 8;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
	case CRTC_PIX_WIDTH_32BPP:	/* ARGB 8888 */
		bpp = 32;
		var->red.offset = 16;
		var->red.length = 8;
		var->green.offset = 8;
		var->green.length = 8;
		var->blue.offset = 0;
		var->blue.length = 8;
		var->transp.offset = 24;
		var->transp.length = 8;
		break;
	default:
		FAIL("Invalid pixel width");
	}

	/* output */
	var->xres = xres;
	var->yres = yres;
	var->xres_virtual = crtc->vxres;
	var->yres_virtual = crtc->vyres;
	var->bits_per_pixel = bpp;
	var->left_margin = left;
	var->right_margin = right;
	var->upper_margin = upper;
	var->lower_margin = lower;
	var->hsync_len = hslen;
	var->vsync_len = vslen;
	var->sync = sync;
	var->vmode = FB_VMODE_NONINTERLACED;
	/* In double scan mode, the vertical parameters are doubled, so we need to
	   half them to get the right values.
	   In interlaced mode the values are already correct, so no correction is
	   necessary.
	 */
	if (interlace)
		var->vmode = FB_VMODE_INTERLACED;

	if (double_scan) {
		var->vmode = FB_VMODE_DOUBLE;
		var->yres>>=1;
		var->upper_margin>>=1;
		var->lower_margin>>=1;
		var->vsync_len>>=1;
	}

	return 0;
}

/* ------------------------------------------------------------------------- */

static int atyfb_set_par(struct fb_info *info)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	struct fb_var_screeninfo *var = &info->var;
	u32 tmp, pixclock;
	int err;
#ifdef DEBUG
	struct fb_var_screeninfo debug;
	u32 pixclock_in_ps;
#endif
	if (par->asleep)
		return 0;

	if ((err = aty_var_to_crtc(info, var, &par->crtc)))
		return err;

	pixclock = atyfb_get_pixclock(var, par);

	if (pixclock == 0) {
		FAIL("Invalid pixclock");
	} else {
		if((err = par->pll_ops->var_to_pll(info, pixclock, var->bits_per_pixel, &par->pll)))
			return err;
	}

	par->accel_flags = var->accel_flags; /* hack */

	if (par->blitter_may_be_busy)
		wait_for_idle(par);

	aty_set_crtc(par, &par->crtc);
	par->dac_ops->set_dac(info, &par->pll, var->bits_per_pixel, par->accel_flags);
	par->pll_ops->set_pll(info, &par->pll);

#ifdef DEBUG
	if(par->pll_ops && par->pll_ops->pll_to_var)
		pixclock_in_ps = par->pll_ops->pll_to_var(info, &(par->pll));
	else
		pixclock_in_ps = 0;

	if(0 == pixclock_in_ps) {
		PRINTKE("ALERT ops->pll_to_var get 0\n");
		pixclock_in_ps = pixclock;
	}

	memset(&debug, 0, sizeof(debug));
	if(!aty_crtc_to_var(&(par->crtc), &debug)) {
		u32 hSync, vRefresh;
		u32 h_disp, h_sync_strt, h_sync_end, h_total;
		u32 v_disp, v_sync_strt, v_sync_end, v_total;

		h_disp = debug.xres;
		h_sync_strt = h_disp + debug.right_margin;
		h_sync_end = h_sync_strt + debug.hsync_len;
		h_total = h_sync_end + debug.left_margin;
		v_disp = debug.yres;
		v_sync_strt = v_disp + debug.lower_margin;
		v_sync_end = v_sync_strt + debug.vsync_len;
		v_total = v_sync_end + debug.upper_margin;

		hSync = 1000000000 / (pixclock_in_ps * h_total);
		vRefresh = (hSync * 1000) / v_total;
        	if (par->crtc.gen_cntl & CRTC_INTERLACE_EN)
            	vRefresh *= 2;
        	if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN)
            	vRefresh /= 2;

		DPRINTK("atyfb_set_par\n");
		DPRINTK(" Set Visible Mode to %ix%i-%i\n", var->xres, var->yres, var->bits_per_pixel);
		DPRINTK(" Virtual resolution %ix%i, pixclock_in_ps %i (calculated %i)\n",
			var->xres_virtual, var->yres_virtual, pixclock, pixclock_in_ps);
		DPRINTK(" Dot clock:           %i MHz\n", 1000000 / pixclock_in_ps);
		DPRINTK(" Horizontal sync:     %i kHz\n", hSync);
		DPRINTK(" Vertical refresh:    %i Hz\n", vRefresh);
		DPRINTK(" x  style: %i.%03i %i %i %i %i   %i %i %i %i\n",
			1000000 / pixclock_in_ps, 1000000 % pixclock_in_ps,
			h_disp, h_sync_strt, h_sync_end, h_total,
			v_disp, v_sync_strt, v_sync_end, v_total);
		DPRINTK(" fb style: %i  %i %i %i %i %i %i %i %i\n",
			pixclock_in_ps,
			debug.left_margin, h_disp, debug.right_margin, debug.hsync_len,
			debug.upper_margin, v_disp, debug.lower_margin, debug.vsync_len);
	}
#endif /* DEBUG */

	if (!M64_HAS(INTEGRATED)) {
		/* Don't forget MEM_CNTL */
		tmp = aty_ld_le32(MEM_CNTL, par) & 0xf0ffffff;
		switch (var->bits_per_pixel) {
		case 8:
			tmp |= 0x02000000;
			break;
		case 16:
			tmp |= 0x03000000;
			break;
		case 32:
			tmp |= 0x06000000;
			break;
		}
		aty_st_le32(MEM_CNTL, tmp, par);
	} else {
		tmp = aty_ld_le32(MEM_CNTL, par) & 0xf00fffff;
		if (!M64_HAS(MAGIC_POSTDIV))
			tmp |= par->mem_refresh_rate << 20;
		switch (var->bits_per_pixel) {
		case 8:
		case 24:
			tmp |= 0x00000000;
			break;
		case 16:
			tmp |= 0x04000000;
			break;
		case 32:
			tmp |= 0x08000000;
			break;
		}
		if (M64_HAS(CT_BUS)) {
			aty_st_le32(DAC_CNTL, 0x87010184, par);
			aty_st_le32(BUS_CNTL, 0x680000f9, par);
		} else if (M64_HAS(VT_BUS)) {
			aty_st_le32(DAC_CNTL, 0x87010184, par);
			aty_st_le32(BUS_CNTL, 0x680000f9, par);
		} else if (M64_HAS(MOBIL_BUS)) {
			aty_st_le32(DAC_CNTL, 0x80010102, par);
			aty_st_le32(BUS_CNTL, 0x7b33a040 | (par->aux_start ? BUS_APER_REG_DIS : 0), par);
		} else {
			/* GT */
			aty_st_le32(DAC_CNTL, 0x86010102, par);
			aty_st_le32(BUS_CNTL, 0x7b23a040 | (par->aux_start ? BUS_APER_REG_DIS : 0), par);
			aty_st_le32(EXT_MEM_CNTL, aty_ld_le32(EXT_MEM_CNTL, par) | 0x5000001, par);
		}
		aty_st_le32(MEM_CNTL, tmp, par);
	}
	aty_st_8(DAC_MASK, 0xff, par);

	info->fix.line_length = var->xres_virtual * var->bits_per_pixel/8;
	info->fix.visual = var->bits_per_pixel <= 8 ?
		FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;

	/* Initialize the graphics engine */
	if (par->accel_flags & FB_ACCELF_TEXT)
		aty_init_engine(par, info);

#ifdef CONFIG_BOOTX_TEXT
	btext_update_display(info->fix.smem_start,
		(((par->crtc.h_tot_disp >> 16) & 0xff) + 1) * 8,
		((par->crtc.v_tot_disp >> 16) & 0x7ff) + 1,
		var->bits_per_pixel,
		par->crtc.vxres * var->bits_per_pixel / 8);
#endif /* CONFIG_BOOTX_TEXT */
#if 0
	/* switch to accelerator mode */
	if (!(par->crtc.gen_cntl & CRTC_EXT_DISP_EN))
		aty_st_le32(CRTC_GEN_CNTL, par->crtc.gen_cntl | CRTC_EXT_DISP_EN, par);
#endif
#ifdef DEBUG
{
	/* dump non shadow CRTC, pll, LCD registers */
	int i; u32 base;

	/* CRTC registers */
	base = 0x2000;
	printk("debug atyfb: Mach64 non-shadow register values:");
	for (i = 0; i < 256; i = i+4) {
		if(i%16 == 0) printk("\ndebug atyfb: 0x%04X: ", base + i);
		printk(" %08X", aty_ld_le32(i, par));
	}
	printk("\n\n");

#ifdef CONFIG_FB_ATY_CT
	/* PLL registers */
	base = 0x00;
	printk("debug atyfb: Mach64 PLL register values:");
	for (i = 0; i < 64; i++) {
		if(i%16 == 0) printk("\ndebug atyfb: 0x%02X: ", base + i);
		if(i%4 == 0)  printk(" ");
		printk("%02X", aty_ld_pll_ct(i, par));
	}
	printk("\n\n");
#endif	/* CONFIG_FB_ATY_CT */

#ifdef CONFIG_FB_ATY_GENERIC_LCD
	if (par->lcd_table != 0) {
		/* LCD registers */
		base = 0x00;
		printk("debug atyfb: LCD register values:");
		if(M64_HAS(LT_LCD_REGS)) {
		    for(i = 0; i <= POWER_MANAGEMENT; i++) {
			if(i == EXT_VERT_STRETCH)
			    continue;
			printk("\ndebug atyfb: 0x%04X: ", lt_lcd_regs[i]);
			printk(" %08X", aty_ld_lcd(i, par));
		    }

		} else {
		    for (i = 0; i < 64; i++) {
			if(i%4 == 0) printk("\ndebug atyfb: 0x%02X: ", base + i);
			printk(" %08X", aty_ld_lcd(i, par));
		    }
		}
		printk("\n\n");
	}
#endif /* CONFIG_FB_ATY_GENERIC_LCD */
}
#endif /* DEBUG */
	return 0;
}

static int atyfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	int err;
	struct crtc crtc;
	union aty_pll pll;
	u32 pixclock;

	memcpy(&pll, &(par->pll), sizeof(pll));

	if((err = aty_var_to_crtc(info, var, &crtc)))
		return err;

	pixclock = atyfb_get_pixclock(var, par);

	if (pixclock == 0) {
		FAIL("Invalid pixclock");
	} else {
		if((err = par->pll_ops->var_to_pll(info, pixclock, var->bits_per_pixel, &pll)))
			return err;
	}

	if (var->accel_flags & FB_ACCELF_TEXT)
		info->var.accel_flags = FB_ACCELF_TEXT;
	else
		info->var.accel_flags = 0;

#if 0 /* fbmon is not done. uncomment for 2.5.x -brad */
	if (!fbmon_valid_timings(pixclock, htotal, vtotal, info))
		return -EINVAL;
#endif
	aty_crtc_to_var(&crtc, var);
	var->pixclock = par->pll_ops->pll_to_var(info, &pll);
	return 0;
}

static void set_off_pitch(struct atyfb_par *par, const struct fb_info *info)
{
	u32 xoffset = info->var.xoffset;
	u32 yoffset = info->var.yoffset;
	u32 vxres = par->crtc.vxres;
	u32 bpp = info->var.bits_per_pixel;

	par->crtc.off_pitch = ((yoffset * vxres + xoffset) * bpp / 64) | (vxres << 19);
}


    /*
     *  Open/Release the frame buffer device
     */

static int atyfb_open(struct fb_info *info, int user)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;

	if (user) {
		par->open++;
#ifdef __sparc__
		par->mmaped = 0;
#endif
	}
	return (0);
}

static irqreturn_t aty_irq(int irq, void *dev_id, struct pt_regs *fp)
{
	struct atyfb_par *par = dev_id;
	int handled = 0;
	u32 int_cntl;

	spin_lock(&par->int_lock);

	int_cntl = aty_ld_le32(CRTC_INT_CNTL, par);

	if (int_cntl & CRTC_VBLANK_INT) {
		/* clear interrupt */
		aty_st_le32(CRTC_INT_CNTL, (int_cntl & CRTC_INT_EN_MASK) | CRTC_VBLANK_INT_AK, par);
		par->vblank.count++;
		if (par->vblank.pan_display) {
			par->vblank.pan_display = 0;
			aty_st_le32(CRTC_OFF_PITCH, par->crtc.off_pitch, par);
		}
		wake_up_interruptible(&par->vblank.wait);
		handled = 1;
	}

	spin_unlock(&par->int_lock);

	return IRQ_RETVAL(handled);
}

static int aty_enable_irq(struct atyfb_par *par, int reenable)
{
	u32 int_cntl;

	if (!test_and_set_bit(0, &par->irq_flags)) {
		if (request_irq(par->irq, aty_irq, SA_SHIRQ, "atyfb", par)) {
			clear_bit(0, &par->irq_flags);
			return -EINVAL;
		}
		spin_lock_irq(&par->int_lock);
		int_cntl = aty_ld_le32(CRTC_INT_CNTL, par) & CRTC_INT_EN_MASK;
		/* clear interrupt */
		aty_st_le32(CRTC_INT_CNTL, int_cntl | CRTC_VBLANK_INT_AK, par);
		/* enable interrupt */
		aty_st_le32(CRTC_INT_CNTL, int_cntl | CRTC_VBLANK_INT_EN, par);
		spin_unlock_irq(&par->int_lock);
	} else if (reenable) {
		spin_lock_irq(&par->int_lock);
		int_cntl = aty_ld_le32(CRTC_INT_CNTL, par) & CRTC_INT_EN_MASK;
		if (!(int_cntl & CRTC_VBLANK_INT_EN)) {
			printk("atyfb: someone disabled IRQ [%08x]\n", int_cntl);
			/* re-enable interrupt */
			aty_st_le32(CRTC_INT_CNTL, int_cntl | CRTC_VBLANK_INT_EN, par );
		}
		spin_unlock_irq(&par->int_lock);
	}

	return 0;
}

static int aty_disable_irq(struct atyfb_par *par)
{
	u32 int_cntl;

	if (test_and_clear_bit(0, &par->irq_flags)) {
		if (par->vblank.pan_display) {
			par->vblank.pan_display = 0;
			aty_st_le32(CRTC_OFF_PITCH, par->crtc.off_pitch, par);
		}
		spin_lock_irq(&par->int_lock);
		int_cntl = aty_ld_le32(CRTC_INT_CNTL, par) & CRTC_INT_EN_MASK;
		/* disable interrupt */
		aty_st_le32(CRTC_INT_CNTL, int_cntl & ~CRTC_VBLANK_INT_EN, par );
		spin_unlock_irq(&par->int_lock);
		free_irq(par->irq, par);
	}

	return 0;
}

static int atyfb_release(struct fb_info *info, int user)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	if (user) {
		par->open--;
		mdelay(1);
		wait_for_idle(par);
		if (!par->open) {
#ifdef __sparc__
			int was_mmaped = par->mmaped;

			par->mmaped = 0;

			if (was_mmaped) {
				struct fb_var_screeninfo var;

				/* Now reset the default display config, we have no
				 * idea what the program(s) which mmap'd the chip did
				 * to the configuration, nor whether it restored it
				 * correctly.
				 */
				var = default_var;
				if (noaccel)
					var.accel_flags &= ~FB_ACCELF_TEXT;
				else
					var.accel_flags |= FB_ACCELF_TEXT;
				if (var.yres == var.yres_virtual) {
					u32 videoram = (info->fix.smem_len - (PAGE_SIZE << 2));
					var.yres_virtual = ((videoram * 8) / var.bits_per_pixel) / var.xres_virtual;
					if (var.yres_virtual < var.yres)
						var.yres_virtual = var.yres;
				}
			}
#endif
			aty_disable_irq(par);
		}
	}
	return (0);
}

    /*
     *  Pan or Wrap the Display
     *
     *  This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
     */

static int atyfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	u32 xres, yres, xoffset, yoffset;

	xres = (((par->crtc.h_tot_disp >> 16) & 0xff) + 1) * 8;
	yres = ((par->crtc.v_tot_disp >> 16) & 0x7ff) + 1;
	if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN)
		yres >>= 1;
	xoffset = (var->xoffset + 7) & ~7;
	yoffset = var->yoffset;
	if (xoffset + xres > par->crtc.vxres || yoffset + yres > par->crtc.vyres)
		return -EINVAL;
	info->var.xoffset = xoffset;
	info->var.yoffset = yoffset;
	if (par->asleep)
		return 0;

	set_off_pitch(par, info);
	if ((var->activate & FB_ACTIVATE_VBL) && !aty_enable_irq(par, 0)) {
		par->vblank.pan_display = 1;
	} else {
		par->vblank.pan_display = 0;
		aty_st_le32(CRTC_OFF_PITCH, par->crtc.off_pitch, par);
	}

	return 0;
}

static int aty_waitforvblank(struct atyfb_par *par, u32 crtc)
{
	struct aty_interrupt *vbl;
	unsigned int count;
	int ret;

	switch (crtc) {
	case 0:
		vbl = &par->vblank;
		break;
	default:
		return -ENODEV;
	}

	ret = aty_enable_irq(par, 0);
	if (ret)
		return ret;

	count = vbl->count;
	ret = wait_event_interruptible_timeout(vbl->wait, count != vbl->count, HZ/10);
	if (ret < 0) {
		return ret;
	}
	if (ret == 0) {
		aty_enable_irq(par, 1);
		return -ETIMEDOUT;
	}

	return 0;
}


#ifdef DEBUG
#define ATYIO_CLKR		0x41545900	/* ATY\00 */
#define ATYIO_CLKW		0x41545901	/* ATY\01 */

struct atyclk {
	u32 ref_clk_per;
	u8 pll_ref_div;
	u8 mclk_fb_div;
	u8 mclk_post_div;	/* 1,2,3,4,8 */
	u8 mclk_fb_mult;	/* 2 or 4 */
	u8 xclk_post_div;	/* 1,2,3,4,8 */
	u8 vclk_fb_div;
	u8 vclk_post_div;	/* 1,2,3,4,6,8,12 */
	u32 dsp_xclks_per_row;	/* 0-16383 */
	u32 dsp_loop_latency;	/* 0-15 */
	u32 dsp_precision;	/* 0-7 */
	u32 dsp_on;		/* 0-2047 */
	u32 dsp_off;		/* 0-2047 */
};

#define ATYIO_FEATR		0x41545902	/* ATY\02 */
#define ATYIO_FEATW		0x41545903	/* ATY\03 */
#endif

#ifndef FBIO_WAITFORVSYNC
#define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32)
#endif

static int atyfb_ioctl(struct inode *inode, struct file *file, u_int cmd,
	u_long arg, struct fb_info *info)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
#ifdef __sparc__
	struct fbtype fbtyp;
#endif

	switch (cmd) {
#ifdef __sparc__
	case FBIOGTYPE:
		fbtyp.fb_type = FBTYPE_PCI_GENERIC;
		fbtyp.fb_width = par->crtc.vxres;
		fbtyp.fb_height = par->crtc.vyres;
		fbtyp.fb_depth = info->var.bits_per_pixel;
		fbtyp.fb_cmsize = info->cmap.len;
		fbtyp.fb_size = info->fix.smem_len;
		if (copy_to_user((struct fbtype __user *) arg, &fbtyp, sizeof(fbtyp)))
			return -EFAULT;
		break;
#endif /* __sparc__ */

	case FBIO_WAITFORVSYNC:
		{
			u32 crtc;

			if (get_user(crtc, (__u32 __user *) arg))
				return -EFAULT;

			return aty_waitforvblank(par, crtc);
		}
		break;

#if defined(DEBUG) && defined(CONFIG_FB_ATY_CT)
	case ATYIO_CLKR:
		if (M64_HAS(INTEGRATED)) {
			struct atyclk clk;
			union aty_pll *pll = &(par->pll);
			u32 dsp_config = pll->ct.dsp_config;
			u32 dsp_on_off = pll->ct.dsp_on_off;
			clk.ref_clk_per = par->ref_clk_per;
			clk.pll_ref_div = pll->ct.pll_ref_div;
			clk.mclk_fb_div = pll->ct.mclk_fb_div;
			clk.mclk_post_div = pll->ct.mclk_post_div_real;
			clk.mclk_fb_mult = pll->ct.mclk_fb_mult;
			clk.xclk_post_div = pll->ct.xclk_post_div_real;
			clk.vclk_fb_div = pll->ct.vclk_fb_div;
			clk.vclk_post_div = pll->ct.vclk_post_div_real;
			clk.dsp_xclks_per_row = dsp_config & 0x3fff;
			clk.dsp_loop_latency = (dsp_config >> 16) & 0xf;
			clk.dsp_precision = (dsp_config >> 20) & 7;
			clk.dsp_off = dsp_on_off & 0x7ff;
			clk.dsp_on = (dsp_on_off >> 16) & 0x7ff;
			if (copy_to_user((struct atyclk __user *) arg, &clk,
					 sizeof(clk)))
				return -EFAULT;
		} else
			return -EINVAL;
		break;
	case ATYIO_CLKW:
		if (M64_HAS(INTEGRATED)) {
			struct atyclk clk;
			union aty_pll *pll = &(par->pll);
			if (copy_from_user(&clk, (struct atyclk __user *) arg, sizeof(clk)))
				return -EFAULT;
			par->ref_clk_per = clk.ref_clk_per;
			pll->ct.pll_ref_div = clk.pll_ref_div;
			pll->ct.mclk_fb_div = clk.mclk_fb_div;
			pll->ct.mclk_post_div_real = clk.mclk_post_div;
			pll->ct.mclk_fb_mult = clk.mclk_fb_mult;
			pll->ct.xclk_post_div_real = clk.xclk_post_div;
			pll->ct.vclk_fb_div = clk.vclk_fb_div;
			pll->ct.vclk_post_div_real = clk.vclk_post_div;
			pll->ct.dsp_config = (clk.dsp_xclks_per_row & 0x3fff) |
				((clk.dsp_loop_latency & 0xf)<<16)| ((clk.dsp_precision & 7)<<20);
			pll->ct.dsp_on_off = (clk.dsp_off & 0x7ff) | ((clk.dsp_on & 0x7ff)<<16);
			/*aty_calc_pll_ct(info, &pll->ct);*/
			aty_set_pll_ct(info, pll);
		} else
			return -EINVAL;
		break;
	case ATYIO_FEATR:
		if (get_user(par->features, (u32 __user *) arg))
			return -EFAULT;
		break;
	case ATYIO_FEATW:
		if (put_user(par->features, (u32 __user *) arg))
			return -EFAULT;
		break;
#endif /* DEBUG && CONFIG_FB_ATY_CT */
	default:
		return -EINVAL;
	}
	return 0;
}

static int atyfb_sync(struct fb_info *info)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;

	if (par->blitter_may_be_busy)
		wait_for_idle(par);
	return 0;
}

#ifdef __sparc__
static int atyfb_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	unsigned int size, page, map_size = 0;
	unsigned long map_offset = 0;
	unsigned long off;
	int i;

	if (!par->mmap_map)
		return -ENXIO;

	if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
		return -EINVAL;

	off = vma->vm_pgoff << PAGE_SHIFT;
	size = vma->vm_end - vma->vm_start;

	/* To stop the swapper from even considering these pages. */
	vma->vm_flags |= (VM_IO | VM_RESERVED);

	if (((vma->vm_pgoff == 0) && (size == info->fix.smem_len)) ||
	    ((off == info->fix.smem_len) && (size == PAGE_SIZE)))
		off += 0x8000000000000000UL;

	vma->vm_pgoff = off >> PAGE_SHIFT;	/* propagate off changes */

	/* Each page, see which map applies */
	for (page = 0; page < size;) {
		map_size = 0;
		for (i = 0; par->mmap_map[i].size; i++) {
			unsigned long start = par->mmap_map[i].voff;
			unsigned long end = start + par->mmap_map[i].size;
			unsigned long offset = off + page;

			if (start > offset)
				continue;
			if (offset >= end)
				continue;

			map_size = par->mmap_map[i].size - (offset - start);
			map_offset =
			    par->mmap_map[i].poff + (offset - start);
			break;
		}
		if (!map_size) {
			page += PAGE_SIZE;
			continue;
		}
		if (page + map_size > size)
			map_size = size - page;

		pgprot_val(vma->vm_page_prot) &=
		    ~(par->mmap_map[i].prot_mask);
		pgprot_val(vma->vm_page_prot) |= par->mmap_map[i].prot_flag;

		if (remap_pfn_range(vma, vma->vm_start + page,
			map_offset >> PAGE_SHIFT, map_size, vma->vm_page_prot))
			return -EAGAIN;

		page += map_size;
	}

	if (!map_size)
		return -EINVAL;

	if (!par->mmaped)
		par->mmaped = 1;
	return 0;
}

static struct {
	u32 yoffset;
	u8 r[2][256];
	u8 g[2][256];
	u8 b[2][256];
} atyfb_save;

static void atyfb_save_palette(struct atyfb_par *par, int enter)
{
	int i, tmp;

	for (i = 0; i < 256; i++) {
		tmp = aty_ld_8(DAC_CNTL, par) & 0xfc;
		if (M64_HAS(EXTRA_BRIGHT))
			tmp |= 0x2;
		aty_st_8(DAC_CNTL, tmp, par);
		aty_st_8(DAC_MASK, 0xff, par);

		writeb(i, &par->aty_cmap_regs->rindex);
		atyfb_save.r[enter][i] = readb(&par->aty_cmap_regs->lut);
		atyfb_save.g[enter][i] = readb(&par->aty_cmap_regs->lut);
		atyfb_save.b[enter][i] = readb(&par->aty_cmap_regs->lut);
		writeb(i, &par->aty_cmap_regs->windex);
		writeb(atyfb_save.r[1 - enter][i],
		       &par->aty_cmap_regs->lut);
		writeb(atyfb_save.g[1 - enter][i],
		       &par->aty_cmap_regs->lut);
		writeb(atyfb_save.b[1 - enter][i],
		       &par->aty_cmap_regs->lut);
	}
}

static void atyfb_palette(int enter)
{
	struct atyfb_par *par;
	struct fb_info *info;
	int i;

	for (i = 0; i < FB_MAX; i++) {
		info = registered_fb[i];
		if (info && info->fbops == &atyfb_ops) {
			par = (struct atyfb_par *) info->par;
			
			atyfb_save_palette(par, enter);
			if (enter) {
				atyfb_save.yoffset = info->var.yoffset;
				info->var.yoffset = 0;
				set_off_pitch(par, info);
			} else {
				info->var.yoffset = atyfb_save.yoffset;
				set_off_pitch(par, info);
			}
			aty_st_le32(CRTC_OFF_PITCH, par->crtc.off_pitch, par);
			break;
		}
	}
}
#endif /* __sparc__ */



#if defined(CONFIG_PM) && defined(CONFIG_PCI)

/* Power management routines. Those are used for PowerBook sleep.
 */
static int aty_power_mgmt(int sleep, struct atyfb_par *par)
{
	u32 pm;
	int timeout;

	pm = aty_ld_lcd(POWER_MANAGEMENT, par);
	pm = (pm & ~PWR_MGT_MODE_MASK) | PWR_MGT_MODE_REG;
	aty_st_lcd(POWER_MANAGEMENT, pm, par);
	pm = aty_ld_lcd(POWER_MANAGEMENT, par);

	timeout = 2000;
	if (sleep) {
		/* Sleep */
		pm &= ~PWR_MGT_ON;
		aty_st_lcd(POWER_MANAGEMENT, pm, par);
		pm = aty_ld_lcd(POWER_MANAGEMENT, par);
		udelay(10);
		pm &= ~(PWR_BLON | AUTO_PWR_UP);
		pm |= SUSPEND_NOW;
		aty_st_lcd(POWER_MANAGEMENT, pm, par);
		pm = aty_ld_lcd(POWER_MANAGEMENT, par);
		udelay(10);
		pm |= PWR_MGT_ON;
		aty_st_lcd(POWER_MANAGEMENT, pm, par);
		do {
			pm = aty_ld_lcd(POWER_MANAGEMENT, par);
			mdelay(1);
			if ((--timeout) == 0)
				break;
		} while ((pm & PWR_MGT_STATUS_MASK) != PWR_MGT_STATUS_SUSPEND);
	} else {
		/* Wakeup */
		pm &= ~PWR_MGT_ON;
		aty_st_lcd(POWER_MANAGEMENT, pm, par);
		pm = aty_ld_lcd(POWER_MANAGEMENT, par);
		udelay(10);
		pm &= ~SUSPEND_NOW;
		pm |= (PWR_BLON | AUTO_PWR_UP);
		aty_st_lcd(POWER_MANAGEMENT, pm, par);
		pm = aty_ld_lcd(POWER_MANAGEMENT, par);
		udelay(10);
		pm |= PWR_MGT_ON;
		aty_st_lcd(POWER_MANAGEMENT, pm, par);
		do {
			pm = aty_ld_lcd(POWER_MANAGEMENT, par);
			mdelay(1);
			if ((--timeout) == 0)
				break;
		} while ((pm & PWR_MGT_STATUS_MASK) != 0);
	}
	mdelay(500);

	return timeout ? 0 : -EIO;
}

static int atyfb_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct fb_info *info = pci_get_drvdata(pdev);
	struct atyfb_par *par = (struct atyfb_par *) info->par;

#ifndef CONFIG_PPC_PMAC
	/* HACK ALERT ! Once I find a proper way to say to each driver
	 * individually what will happen with it's PCI slot, I'll change
	 * that. On laptops, the AGP slot is just unclocked, so D2 is
	 * expected, while on desktops, the card is powered off
	 */
	return 0;
#endif /* CONFIG_PPC_PMAC */

	if (state.event == pdev->dev.power.power_state.event)
		return 0;

	acquire_console_sem();

	fb_set_suspend(info, 1);

	/* Idle & reset engine */
	wait_for_idle(par);
	aty_reset_engine(par);

	/* Blank display and LCD */
	atyfb_blank(FB_BLANK_POWERDOWN, info);

	par->asleep = 1;
	par->lock_blank = 1;

	/* Set chip to "suspend" mode */
	if (aty_power_mgmt(1, par)) {
		par->asleep = 0;
		par->lock_blank = 0;
		atyfb_blank(FB_BLANK_UNBLANK, info);
		fb_set_suspend(info, 0);
		release_console_sem();
		return -EIO;
	}

	release_console_sem();

	pdev->dev.power.power_state = state;

	return 0;
}

static int atyfb_pci_resume(struct pci_dev *pdev)
{
	struct fb_info *info = pci_get_drvdata(pdev);
	struct atyfb_par *par = (struct atyfb_par *) info->par;

	if (pdev->dev.power.power_state.event == PM_EVENT_ON)
		return 0;

	acquire_console_sem();

	if (pdev->dev.power.power_state.event == 2)
		aty_power_mgmt(0, par);
	par->asleep = 0;

	/* Restore display */
	atyfb_set_par(info);

	/* Refresh */
	fb_set_suspend(info, 0);

	/* Unblank */
	par->lock_blank = 0;
	atyfb_blank(FB_BLANK_UNBLANK, info);

	release_console_sem();

	pdev->dev.power.power_state = PMSG_ON;

	return 0;
}

#endif /*  defined(CONFIG_PM) && defined(CONFIG_PCI) */

#ifdef CONFIG_PMAC_BACKLIGHT

    /*
     *   LCD backlight control
     */

static int backlight_conv[] = {
	0x00, 0x3f, 0x4c, 0x59, 0x66, 0x73, 0x80, 0x8d,
	0x9a, 0xa7, 0xb4, 0xc1, 0xcf, 0xdc, 0xe9, 0xff
};

static int aty_set_backlight_enable(int on, int level, void *data)
{
	struct fb_info *info = (struct fb_info *) data;
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	unsigned int reg = aty_ld_lcd(LCD_MISC_CNTL, par);

	reg |= (BLMOD_EN | BIASMOD_EN);
	if (on && level > BACKLIGHT_OFF) {
		reg &= ~BIAS_MOD_LEVEL_MASK;
		reg |= (backlight_conv[level] << BIAS_MOD_LEVEL_SHIFT);
	} else {
		reg &= ~BIAS_MOD_LEVEL_MASK;
		reg |= (backlight_conv[0] << BIAS_MOD_LEVEL_SHIFT);
	}
	aty_st_lcd(LCD_MISC_CNTL, reg, par);
	return 0;
}

static int aty_set_backlight_level(int level, void *data)
{
	return aty_set_backlight_enable(1, level, data);
}

static struct backlight_controller aty_backlight_controller = {
	aty_set_backlight_enable,
	aty_set_backlight_level
};
#endif /* CONFIG_PMAC_BACKLIGHT */

static void __init aty_calc_mem_refresh(struct atyfb_par *par, int xclk)
{
	const int ragepro_tbl[] = {
		44, 50, 55, 66, 75, 80, 100
	};
	const int ragexl_tbl[] = {
		50, 66, 75, 83, 90, 95, 100, 105,
		110, 115, 120, 125, 133, 143, 166
	};
	const int *refresh_tbl;
	int i, size;

	if (IS_XL(par->pci_id) || IS_MOBILITY(par->pci_id)) {
		refresh_tbl = ragexl_tbl;
		size = sizeof(ragexl_tbl)/sizeof(int);
	} else {
		refresh_tbl = ragepro_tbl;
		size = sizeof(ragepro_tbl)/sizeof(int);
	}

	for (i=0; i < size; i++) {
		if (xclk < refresh_tbl[i])
		break;
	}
	par->mem_refresh_rate = i;
}

    /*
     *  Initialisation
     */

static struct fb_info *fb_list = NULL;

static int __init aty_init(struct fb_info *info, const char *name)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	const char *ramname = NULL, *xtal;
	int gtb_memsize;
	struct fb_var_screeninfo var;
	u8 pll_ref_div;
	u32 i;
#if defined(CONFIG_PPC)
	int sense;
#endif

	init_waitqueue_head(&par->vblank.wait);
	spin_lock_init(&par->int_lock);

	par->aty_cmap_regs =
	    (struct aty_cmap_regs __iomem *) (par->ati_regbase + 0xc0);

#ifdef CONFIG_PPC_PMAC
	/* The Apple iBook1 uses non-standard memory frequencies. We detect it
	 * and set the frequency manually. */
	if (machine_is_compatible("PowerBook2,1")) {
		par->pll_limits.mclk = 70;
		par->pll_limits.xclk = 53;
	}
#endif
	if (pll)
		par->pll_limits.pll_max = pll;
	if (mclk)
		par->pll_limits.mclk = mclk;
	if (xclk)
		par->pll_limits.xclk = xclk;

	aty_calc_mem_refresh(par, par->pll_limits.xclk);
	par->pll_per = 1000000/par->pll_limits.pll_max;
	par->mclk_per = 1000000/par->pll_limits.mclk;
	par->xclk_per = 1000000/par->pll_limits.xclk;

	par->ref_clk_per = 1000000000000ULL / 14318180;
	xtal = "14.31818";

#ifdef CONFIG_FB_ATY_GX
	if (!M64_HAS(INTEGRATED)) {
		u32 stat0;
		u8 dac_type, dac_subtype, clk_type;
		stat0 = aty_ld_le32(CONFIG_STAT0, par);
		par->bus_type = (stat0 >> 0) & 0x07;
		par->ram_type = (stat0 >> 3) & 0x07;
		ramname = aty_gx_ram[par->ram_type];
		/* FIXME: clockchip/RAMDAC probing? */
		dac_type = (aty_ld_le32(DAC_CNTL, par) >> 16) & 0x07;
#ifdef CONFIG_ATARI
		clk_type = CLK_ATI18818_1;
		dac_type = (stat0 >> 9) & 0x07;
		if (dac_type == 0x07)
			dac_subtype = DAC_ATT20C408;
		else
			dac_subtype = (aty_ld_8(SCRATCH_REG1 + 1, par) & 0xF0) | dac_type;
#else
		dac_type = DAC_IBMRGB514;
		dac_subtype = DAC_IBMRGB514;
		clk_type = CLK_IBMRGB514;
#endif
		switch (dac_subtype) {
		case DAC_IBMRGB514:
			par->dac_ops = &aty_dac_ibm514;
			break;
		case DAC_ATI68860_B:
		case DAC_ATI68860_C:
			par->dac_ops = &aty_dac_ati68860b;
			break;
		case DAC_ATT20C408:
		case DAC_ATT21C498:
			par->dac_ops = &aty_dac_att21c498;
			break;
		default:
			PRINTKI("aty_init: DAC type not implemented yet!\n");
			par->dac_ops = &aty_dac_unsupported;
			break;
		}
		switch (clk_type) {
		case CLK_ATI18818_1:
			par->pll_ops = &aty_pll_ati18818_1;
			break;
		case CLK_STG1703:
			par->pll_ops = &aty_pll_stg1703;
			break;
		case CLK_CH8398:
			par->pll_ops = &aty_pll_ch8398;
			break;
		case CLK_ATT20C408:
			par->pll_ops = &aty_pll_att20c408;
			break;
		case CLK_IBMRGB514:
			par->pll_ops = &aty_pll_ibm514;
			break;
		default:
			PRINTKI("aty_init: CLK type not implemented yet!");
			par->pll_ops = &aty_pll_unsupported;
			break;
		}
	}
#endif /* CONFIG_FB_ATY_GX */
#ifdef CONFIG_FB_ATY_CT
	if (M64_HAS(INTEGRATED)) {
		par->dac_ops = &aty_dac_ct;
		par->pll_ops = &aty_pll_ct;
		par->bus_type = PCI;
#ifdef CONFIG_FB_ATY_XL_INIT
		if (IS_XL(par->pci_id))
			atyfb_xl_init(info);
#endif
		par->ram_type = (aty_ld_le32(CONFIG_STAT0, par) & 0x07);
		ramname = aty_ct_ram[par->ram_type];
		/* for many chips, the mclk is 67 MHz for SDRAM, 63 MHz otherwise */
		if (par->pll_limits.mclk == 67 && par->ram_type < SDRAM)
			par->pll_limits.mclk = 63;
	}

	if (M64_HAS(GTB_DSP)
	    && (pll_ref_div = aty_ld_pll_ct(PLL_REF_DIV, par))) {
		int diff1, diff2;
		diff1 = 510 * 14 / pll_ref_div - par->pll_limits.pll_max;
		diff2 = 510 * 29 / pll_ref_div - par->pll_limits.pll_max;
		if (diff1 < 0)
			diff1 = -diff1;
		if (diff2 < 0)
			diff2 = -diff2;
		if (diff2 < diff1) {
			par->ref_clk_per = 1000000000000ULL / 29498928;
			xtal = "29.498928";
		}
	}
#endif /* CONFIG_FB_ATY_CT */

	/* save previous video mode */
	aty_get_crtc(par, &saved_crtc);
	if(par->pll_ops->get_pll)
		par->pll_ops->get_pll(info, &saved_pll);

	i = aty_ld_le32(MEM_CNTL, par);
	gtb_memsize = M64_HAS(GTB_DSP);
	if (gtb_memsize)
		switch (i & 0xF) {	/* 0xF used instead of MEM_SIZE_ALIAS */
		case MEM_SIZE_512K:
			info->fix.smem_len = 0x80000;
			break;
		case MEM_SIZE_1M:
			info->fix.smem_len = 0x100000;
			break;
		case MEM_SIZE_2M_GTB:
			info->fix.smem_len = 0x200000;
			break;
		case MEM_SIZE_4M_GTB:
			info->fix.smem_len = 0x400000;
			break;
		case MEM_SIZE_6M_GTB:
			info->fix.smem_len = 0x600000;
			break;
		case MEM_SIZE_8M_GTB:
			info->fix.smem_len = 0x800000;
			break;
		default:
			info->fix.smem_len = 0x80000;
	} else
		switch (i & MEM_SIZE_ALIAS) {
		case MEM_SIZE_512K:
			info->fix.smem_len = 0x80000;
			break;
		case MEM_SIZE_1M:
			info->fix.smem_len = 0x100000;
			break;
		case MEM_SIZE_2M:
			info->fix.smem_len = 0x200000;
			break;
		case MEM_SIZE_4M:
			info->fix.smem_len = 0x400000;
			break;
		case MEM_SIZE_6M:
			info->fix.smem_len = 0x600000;
			break;
		case MEM_SIZE_8M:
			info->fix.smem_len = 0x800000;
			break;
		default:
			info->fix.smem_len = 0x80000;
		}

	if (M64_HAS(MAGIC_VRAM_SIZE)) {
		if (aty_ld_le32(CONFIG_STAT1, par) & 0x40000000)
			info->fix.smem_len += 0x400000;
	}

	if (vram) {
		info->fix.smem_len = vram * 1024;
		i = i & ~(gtb_memsize ? 0xF : MEM_SIZE_ALIAS);
		if (info->fix.smem_len <= 0x80000)
			i |= MEM_SIZE_512K;
		else if (info->fix.smem_len <= 0x100000)
			i |= MEM_SIZE_1M;
		else if (info->fix.smem_len <= 0x200000)
			i |= gtb_memsize ? MEM_SIZE_2M_GTB : MEM_SIZE_2M;
		else if (info->fix.smem_len <= 0x400000)
			i |= gtb_memsize ? MEM_SIZE_4M_GTB : MEM_SIZE_4M;
		else if (info->fix.smem_len <= 0x600000)
			i |= gtb_memsize ? MEM_SIZE_6M_GTB : MEM_SIZE_6M;
		else
			i |= gtb_memsize ? MEM_SIZE_8M_GTB : MEM_SIZE_8M;
		aty_st_le32(MEM_CNTL, i, par);
	}

	/*
	 *  Reg Block 0 (CT-compatible block) is at mmio_start
	 *  Reg Block 1 (multimedia extensions) is at mmio_start - 0x400
	 */
	if (M64_HAS(GX)) {
		info->fix.mmio_len = 0x400;
		info->fix.accel = FB_ACCEL_ATI_MACH64GX;
	} else if (M64_HAS(CT)) {
		info->fix.mmio_len = 0x400;
		info->fix.accel = FB_ACCEL_ATI_MACH64CT;
	} else if (M64_HAS(VT)) {
		info->fix.mmio_start -= 0x400;
		info->fix.mmio_len = 0x800;
		info->fix.accel = FB_ACCEL_ATI_MACH64VT;
	} else {/* GT */
		info->fix.mmio_start -= 0x400;
		info->fix.mmio_len = 0x800;
		info->fix.accel = FB_ACCEL_ATI_MACH64GT;
	}

	PRINTKI("%d%c %s, %s MHz XTAL, %d MHz PLL, %d Mhz MCLK, %d MHz XCLK\n",
	       info->fix.smem_len == 0x80000 ? 512 : (info->fix.smem_len >> 20),
	       info->fix.smem_len == 0x80000 ? 'K' : 'M', ramname, xtal, par->pll_limits.pll_max,
	       par->pll_limits.mclk, par->pll_limits.xclk);

#if defined(DEBUG) && defined(CONFIG_ATY_CT)
	if (M64_HAS(INTEGRATED)) {
		int i;
		printk("debug atyfb: BUS_CNTL DAC_CNTL MEM_CNTL EXT_MEM_CNTL CRTC_GEN_CNTL "
		       "DSP_CONFIG DSP_ON_OFF CLOCK_CNTL\n"
		       "debug atyfb: %08x %08x %08x %08x     %08x      %08x   %08x   %08x\n"
		       "debug atyfb: PLL",
			aty_ld_le32(BUS_CNTL, par), aty_ld_le32(DAC_CNTL, par),
			aty_ld_le32(MEM_CNTL, par), aty_ld_le32(EXT_MEM_CNTL, par),
			aty_ld_le32(CRTC_GEN_CNTL, par), aty_ld_le32(DSP_CONFIG, par),
			aty_ld_le32(DSP_ON_OFF, par), aty_ld_le32(CLOCK_CNTL, par));
		for (i = 0; i < 40; i++)
			printk(" %02x", aty_ld_pll_ct(i, par));
		printk("\n");
	}
#endif
	if(par->pll_ops->init_pll)
		par->pll_ops->init_pll(info, &par->pll);

	/*
	 *  Last page of 8 MB (4 MB on ISA) aperture is MMIO
	 *  FIXME: we should use the auxiliary aperture instead so we can access
	 *  the full 8 MB of video RAM on 8 MB boards
	 */

	if (!par->aux_start &&
		(info->fix.smem_len == 0x800000 || (par->bus_type == ISA && info->fix.smem_len == 0x400000)))
		info->fix.smem_len -= GUI_RESERVE;

	/*
	 *  Disable register access through the linear aperture
	 *  if the auxiliary aperture is used so we can access
	 *  the full 8 MB of video RAM on 8 MB boards.
	 */
	if (par->aux_start)
		aty_st_le32(BUS_CNTL, aty_ld_le32(BUS_CNTL, par) | BUS_APER_REG_DIS, par);

#ifdef CONFIG_MTRR
	par->mtrr_aper = -1;
	par->mtrr_reg = -1;
	if (!nomtrr) {
		/* Cover the whole resource. */
		 par->mtrr_aper = mtrr_add(par->res_start, par->res_size, MTRR_TYPE_WRCOMB, 1);
		 if (par->mtrr_aper >= 0 && !par->aux_start) {
			/* Make a hole for mmio. */
			par->mtrr_reg = mtrr_add(par->res_start + 0x800000 - GUI_RESERVE,
				GUI_RESERVE, MTRR_TYPE_UNCACHABLE, 1);
			if (par->mtrr_reg < 0) {
				mtrr_del(par->mtrr_aper, 0, 0);
				par->mtrr_aper = -1;
			}
		 }
	}
#endif

	info->fbops = &atyfb_ops;
	info->pseudo_palette = pseudo_palette;
	info->flags = FBINFO_FLAG_DEFAULT;

#ifdef CONFIG_PMAC_BACKLIGHT
	if (M64_HAS(G3_PB_1_1) && machine_is_compatible("PowerBook1,1")) {
		/* these bits let the 101 powerbook wake up from sleep -- paulus */
		aty_st_lcd(POWER_MANAGEMENT, aty_ld_lcd(POWER_MANAGEMENT, par)
			   | (USE_F32KHZ | TRISTATE_MEM_EN), par);
	} else if (M64_HAS(MOBIL_BUS))
		register_backlight_controller(&aty_backlight_controller, info, "ati");
#endif /* CONFIG_PMAC_BACKLIGHT */

	memset(&var, 0, sizeof(var));
#ifdef CONFIG_PPC
	if (_machine == _MACH_Pmac) {
		/*
		 *  FIXME: The NVRAM stuff should be put in a Mac-specific file, as it
		 *         applies to all Mac video cards
		 */
		if (mode) {
			if (!mac_find_mode(&var, info, mode, 8))
				var = default_var;
		} else {
			if (default_vmode == VMODE_CHOOSE) {
				if (M64_HAS(G3_PB_1024x768))
					/* G3 PowerBook with 1024x768 LCD */
					default_vmode = VMODE_1024_768_60;
				else if (machine_is_compatible("iMac"))
					default_vmode = VMODE_1024_768_75;
				else if (machine_is_compatible
					 ("PowerBook2,1"))
					/* iBook with 800x600 LCD */
					default_vmode = VMODE_800_600_60;
				else
					default_vmode = VMODE_640_480_67;
				sense = read_aty_sense(par);
				PRINTKI("monitor sense=%x, mode %d\n",
					sense,  mac_map_monitor_sense(sense));
			}
			if (default_vmode <= 0 || default_vmode > VMODE_MAX)
				default_vmode = VMODE_640_480_60;
			if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
				default_cmode = CMODE_8;
			if (mac_vmode_to_var(default_vmode, default_cmode, &var))
				var = default_var;
		}
	} else
#endif /* !CONFIG_PPC */
	if (
#if defined(CONFIG_SPARC32) || defined(CONFIG_SPARC64)
	   /* On Sparc, unless the user gave a specific mode
	    * specification, use the PROM probed values in
	    * default_var.
	    */
	    !mode ||
#endif
	    !fb_find_mode(&var, info, mode, NULL, 0, &defmode, 8))
		var = default_var;

	if (noaccel)
		var.accel_flags &= ~FB_ACCELF_TEXT;
	else
		var.accel_flags |= FB_ACCELF_TEXT;

	if (comp_sync != -1) {
		if (!comp_sync)
			var.sync &= ~FB_SYNC_COMP_HIGH_ACT;
		else
			var.sync |= FB_SYNC_COMP_HIGH_ACT;
	}

	if (var.yres == var.yres_virtual) {
		u32 videoram = (info->fix.smem_len - (PAGE_SIZE << 2));
		var.yres_virtual = ((videoram * 8) / var.bits_per_pixel) / var.xres_virtual;
		if (var.yres_virtual < var.yres)
			var.yres_virtual = var.yres;
	}

	if (atyfb_check_var(&var, info)) {
		PRINTKE("can't set default video mode\n");
		goto aty_init_exit;
	}

#ifdef __sparc__
	atyfb_save_palette(par, 0);
#endif

#ifdef CONFIG_FB_ATY_CT
	if (!noaccel && M64_HAS(INTEGRATED))
		aty_init_cursor(info);
#endif /* CONFIG_FB_ATY_CT */
	info->var = var;

	fb_alloc_cmap(&info->cmap, 256, 0);

	if (register_framebuffer(info) < 0)
		goto aty_init_exit;

	fb_list = info;

	PRINTKI("fb%d: %s frame buffer device on %s\n",
	       info->node, info->fix.id, name);
	return 0;

aty_init_exit:
	/* restore video mode */
	aty_set_crtc(par, &saved_crtc);
	par->pll_ops->set_pll(info, &saved_pll);

#ifdef CONFIG_MTRR
	if (par->mtrr_reg >= 0) {
	    mtrr_del(par->mtrr_reg, 0, 0);
	    par->mtrr_reg = -1;
	}
	if (par->mtrr_aper >= 0) {
	    mtrr_del(par->mtrr_aper, 0, 0);
	    par->mtrr_aper = -1;
	}
#endif
	return -1;
}

#ifdef CONFIG_ATARI
static int __init store_video_par(char *video_str, unsigned char m64_num)
{
	char *p;
	unsigned long vmembase, size, guiregbase;

	PRINTKI("store_video_par() '%s' \n", video_str);

	if (!(p = strsep(&video_str, ";")) || !*p)
		goto mach64_invalid;
	vmembase = simple_strtoul(p, NULL, 0);
	if (!(p = strsep(&video_str, ";")) || !*p)
		goto mach64_invalid;
	size = simple_strtoul(p, NULL, 0);
	if (!(p = strsep(&video_str, ";")) || !*p)
		goto mach64_invalid;
	guiregbase = simple_strtoul(p, NULL, 0);

	phys_vmembase[m64_num] = vmembase;
	phys_size[m64_num] = size;
	phys_guiregbase[m64_num] = guiregbase;
	PRINTKI("stored them all: $%08lX $%08lX $%08lX \n", vmembase, size,
	       guiregbase);
	return 0;

      mach64_invalid:
	phys_vmembase[m64_num] = 0;
	return -1;
}
#endif /* CONFIG_ATARI */

    /*
     *  Blank the display.
     */

static int atyfb_blank(int blank, struct fb_info *info)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	u8 gen_cntl;

	if (par->lock_blank || par->asleep)
		return 0;

#ifdef CONFIG_PMAC_BACKLIGHT
	if ((_machine == _MACH_Pmac) && blank)
		set_backlight_enable(0);
#elif defined(CONFIG_FB_ATY_GENERIC_LCD)
	if (par->lcd_table && blank &&
	    (aty_ld_lcd(LCD_GEN_CNTL, par) & LCD_ON)) {
		u32 pm = aty_ld_lcd(POWER_MANAGEMENT, par);
		pm &= ~PWR_BLON;
		aty_st_lcd(POWER_MANAGEMENT, pm, par);
	}
#endif

	gen_cntl = aty_ld_8(CRTC_GEN_CNTL, par);
	switch (blank) {
        	case FB_BLANK_UNBLANK:
			gen_cntl &= ~(0x4c);
			break;
		case FB_BLANK_NORMAL:
			gen_cntl |= 0x40;
			break;
		case FB_BLANK_VSYNC_SUSPEND:
			gen_cntl |= 0x8;
			break;
		case FB_BLANK_HSYNC_SUSPEND:
			gen_cntl |= 0x4;
			break;
		case FB_BLANK_POWERDOWN:
			gen_cntl |= 0x4c;
			break;
	}
	aty_st_8(CRTC_GEN_CNTL, gen_cntl, par);

#ifdef CONFIG_PMAC_BACKLIGHT
	if ((_machine == _MACH_Pmac) && !blank)
		set_backlight_enable(1);
#elif defined(CONFIG_FB_ATY_GENERIC_LCD)
	if (par->lcd_table && !blank &&
	    (aty_ld_lcd(LCD_GEN_CNTL, par) & LCD_ON)) {
		u32 pm = aty_ld_lcd(POWER_MANAGEMENT, par);
		pm |= PWR_BLON;
		aty_st_lcd(POWER_MANAGEMENT, pm, par);
	}
#endif

	return 0;
}

static void aty_st_pal(u_int regno, u_int red, u_int green, u_int blue,
		       const struct atyfb_par *par)
{
#ifdef CONFIG_ATARI
	out_8(&par->aty_cmap_regs->windex, regno);
	out_8(&par->aty_cmap_regs->lut, red);
	out_8(&par->aty_cmap_regs->lut, green);
	out_8(&par->aty_cmap_regs->lut, blue);
#else
	writeb(regno, &par->aty_cmap_regs->windex);
	writeb(red, &par->aty_cmap_regs->lut);
	writeb(green, &par->aty_cmap_regs->lut);
	writeb(blue, &par->aty_cmap_regs->lut);
#endif
}

    /*
     *  Set a single color register. The values supplied are already
     *  rounded down to the hardware's capabilities (according to the
     *  entries in the var structure). Return != 0 for invalid regno.
     *  !! 4 & 8 =  PSEUDO, > 8 = DIRECTCOLOR
     */

static int atyfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
	u_int transp, struct fb_info *info)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	int i, depth;
	u32 *pal = info->pseudo_palette;

	depth = info->var.bits_per_pixel;
	if (depth == 16)
		depth = (info->var.green.length == 5) ? 15 : 16;

	if (par->asleep)
		return 0;

	if (regno > 255 ||
	    (depth == 16 && regno > 63) ||
	    (depth == 15 && regno > 31))
		return 1;

	red >>= 8;
	green >>= 8;
	blue >>= 8;

	par->palette[regno].red = red;
	par->palette[regno].green = green;
	par->palette[regno].blue = blue;

	if (regno < 16) {
		switch (depth) {
		case 15:
			pal[regno] = (regno << 10) | (regno << 5) | regno;
			break;
		case 16:
			pal[regno] = (regno << 11) | (regno << 5) | regno;
			break;
		case 24:
			pal[regno] = (regno << 16) | (regno << 8) | regno;
			break;
		case 32:
			i = (regno << 8) | regno;
			pal[regno] = (i << 16) | i;
			break;
		}
	}

	i = aty_ld_8(DAC_CNTL, par) & 0xfc;
	if (M64_HAS(EXTRA_BRIGHT))
		i |= 0x2; /* DAC_CNTL | 0x2 turns off the extra brightness for gt */
	aty_st_8(DAC_CNTL, i, par);
	aty_st_8(DAC_MASK, 0xff, par);

	if (M64_HAS(INTEGRATED)) {
		if (depth == 16) {
			if (regno < 32)
				aty_st_pal(regno << 3, red,
					   par->palette[regno<<1].green,
					   blue, par);
			red = par->palette[regno>>1].red;
			blue = par->palette[regno>>1].blue;
			regno <<= 2;
		} else if (depth == 15) {
			regno <<= 3;
			for(i = 0; i < 8; i++) {
			    aty_st_pal(regno + i, red, green, blue, par);
			}
		}
	}
	aty_st_pal(regno, red, green, blue, par);

	return 0;
}

#ifdef CONFIG_PCI

#ifdef __sparc__

extern void (*prom_palette) (int);

static int __devinit atyfb_setup_sparc(struct pci_dev *pdev,
			struct fb_info *info, unsigned long addr)
{
	extern int con_is_present(void);

	struct atyfb_par *par = info->par;
	struct pcidev_cookie *pcp;
	char prop[128];
	int node, len, i, j, ret;
	u32 mem, chip_id;

	/* Do not attach when we have a serial console. */
	if (!con_is_present())
		return -ENXIO;

	/*
	 * Map memory-mapped registers.
	 */
	par->ati_regbase = (void *)addr + 0x7ffc00UL;
	info->fix.mmio_start = addr + 0x7ffc00UL;

	/*
	 * Map in big-endian aperture.
	 */
	info->screen_base = (char *) (addr + 0x800000UL);
	info->fix.smem_start = addr + 0x800000UL;

	/*
	 * Figure mmap addresses from PCI config space.
	 * Split Framebuffer in big- and little-endian halfs.
	 */
	for (i = 0; i < 6 && pdev->resource[i].start; i++)
		/* nothing */ ;
	j = i + 4;

	par->mmap_map = kmalloc(j * sizeof(*par->mmap_map), GFP_ATOMIC);
	if (!par->mmap_map) {
		PRINTKE("atyfb_setup_sparc() can't alloc mmap_map\n");
		return -ENOMEM;
	}
	memset(par->mmap_map, 0, j * sizeof(*par->mmap_map));

	for (i = 0, j = 2; i < 6 && pdev->resource[i].start; i++) {
		struct resource *rp = &pdev->resource[i];
		int io, breg = PCI_BASE_ADDRESS_0 + (i << 2);
		unsigned long base;
		u32 size, pbase;

		base = rp->start;

		io = (rp->flags & IORESOURCE_IO);

		size = rp->end - base + 1;

		pci_read_config_dword(pdev, breg, &pbase);

		if (io)
			size &= ~1;

		/*
		 * Map the framebuffer a second time, this time without
		 * the braindead _PAGE_IE setting. This is used by the
		 * fixed Xserver, but we need to maintain the old mapping
		 * to stay compatible with older ones...
		 */
		if (base == addr) {
			par->mmap_map[j].voff = (pbase + 0x10000000) & PAGE_MASK;
			par->mmap_map[j].poff = base & PAGE_MASK;
			par->mmap_map[j].size = (size + ~PAGE_MASK) & PAGE_MASK;
			par->mmap_map[j].prot_mask = _PAGE_CACHE;
			par->mmap_map[j].prot_flag = _PAGE_E;
			j++;
		}

		/*
		 * Here comes the old framebuffer mapping with _PAGE_IE
		 * set for the big endian half of the framebuffer...
		 */
		if (base == addr) {
			par->mmap_map[j].voff = (pbase + 0x800000) & PAGE_MASK;
			par->mmap_map[j].poff = (base + 0x800000) & PAGE_MASK;
			par->mmap_map[j].size = 0x800000;
			par->mmap_map[j].prot_mask = _PAGE_CACHE;
			par->mmap_map[j].prot_flag = _PAGE_E | _PAGE_IE;
			size -= 0x800000;
			j++;
		}

		par->mmap_map[j].voff = pbase & PAGE_MASK;
		par->mmap_map[j].poff = base & PAGE_MASK;
		par->mmap_map[j].size = (size + ~PAGE_MASK) & PAGE_MASK;
		par->mmap_map[j].prot_mask = _PAGE_CACHE;
		par->mmap_map[j].prot_flag = _PAGE_E;
		j++;
	}

	if((ret = correct_chipset(par)))
		return ret;

	if (IS_XL(pdev->device)) {
		/*
		 * Fix PROMs idea of MEM_CNTL settings...
		 */
		mem = aty_ld_le32(MEM_CNTL, par);
		chip_id = aty_ld_le32(CONFIG_CHIP_ID, par);
		if (((chip_id & CFG_CHIP_TYPE) == VT_CHIP_ID) && !((chip_id >> 24) & 1)) {
			switch (mem & 0x0f) {
			case 3:
				mem = (mem & ~(0x0f)) | 2;
				break;
			case 7:
				mem = (mem & ~(0x0f)) | 3;
				break;
			case 9:
				mem = (mem & ~(0x0f)) | 4;
				break;
			case 11:
				mem = (mem & ~(0x0f)) | 5;
				break;
			default:
				break;
			}
			if ((aty_ld_le32(CONFIG_STAT0, par) & 7) >= SDRAM)
				mem &= ~(0x00700000);
		}
		mem &= ~(0xcf80e000);	/* Turn off all undocumented bits. */
		aty_st_le32(MEM_CNTL, mem, par);
	}

	/*
	 * If this is the console device, we will set default video
	 * settings to what the PROM left us with.
	 */
	node = prom_getchild(prom_root_node);
	node = prom_searchsiblings(node, "aliases");
	if (node) {
		len = prom_getproperty(node, "screen", prop, sizeof(prop));
		if (len > 0) {
			prop[len] = '\0';
			node = prom_finddevice(prop);
		} else
			node = 0;
	}

	pcp = pdev->sysdata;
	if (node == pcp->prom_node) {
		struct fb_var_screeninfo *var = &default_var;
		unsigned int N, P, Q, M, T, R;
		u32 v_total, h_total;
		struct crtc crtc;
		u8 pll_regs[16];
		u8 clock_cntl;

		crtc.vxres = prom_getintdefault(node, "width", 1024);
		crtc.vyres = prom_getintdefault(node, "height", 768);
		var->bits_per_pixel = prom_getintdefault(node, "depth", 8);
		var->xoffset = var->yoffset = 0;
		crtc.h_tot_disp = aty_ld_le32(CRTC_H_TOTAL_DISP, par);
		crtc.h_sync_strt_wid = aty_ld_le32(CRTC_H_SYNC_STRT_WID, par);
		crtc.v_tot_disp = aty_ld_le32(CRTC_V_TOTAL_DISP, par);
		crtc.v_sync_strt_wid = aty_ld_le32(CRTC_V_SYNC_STRT_WID, par);
		crtc.gen_cntl = aty_ld_le32(CRTC_GEN_CNTL, par);
		aty_crtc_to_var(&crtc, var);

		h_total = var->xres + var->right_margin + var->hsync_len + var->left_margin;
		v_total = var->yres + var->lower_margin + var->vsync_len + var->upper_margin;

		/*
		 * Read the PLL to figure actual Refresh Rate.
		 */
		clock_cntl = aty_ld_8(CLOCK_CNTL, par);
		/* DPRINTK("CLOCK_CNTL %02x\n", clock_cntl); */
		for (i = 0; i < 16; i++)
			pll_regs[i] = aty_ld_pll_ct(i, par);

		/*
		 * PLL Reference Divider M:
		 */
		M = pll_regs[2];

		/*
		 * PLL Feedback Divider N (Dependant on CLOCK_CNTL):
		 */
		N = pll_regs[7 + (clock_cntl & 3)];

		/*
		 * PLL Post Divider P (Dependant on CLOCK_CNTL):
		 */
		P = 1 << (pll_regs[6] >> ((clock_cntl & 3) << 1));

		/*
		 * PLL Divider Q:
		 */
		Q = N / P;

		/*
		 * Target Frequency:
		 *
		 *      T * M
		 * Q = -------
		 *      2 * R
		 *
		 * where R is XTALIN (= 14318 or 29498 kHz).
		 */
		if (IS_XL(pdev->device))
			R = 29498;
		else
			R = 14318;

		T = 2 * Q * R / M;

		default_var.pixclock = 1000000000 / T;
	}

	return 0;
}

#else /* __sparc__ */

#ifdef __i386__
#ifdef CONFIG_FB_ATY_GENERIC_LCD
static void aty_init_lcd(struct atyfb_par *par, u32 bios_base)
{
	u32 driv_inf_tab, sig;
	u16 lcd_ofs;

	/* To support an LCD panel, we should know it's dimensions and
	 *  it's desired pixel clock.
	 * There are two ways to do it:
	 *  - Check the startup video mode and calculate the panel
	 *    size from it. This is unreliable.
	 *  - Read it from the driver information table in the video BIOS.
	*/
	/* Address of driver information table is at offset 0x78. */
	driv_inf_tab = bios_base + *((u16 *)(bios_base+0x78));

	/* Check for the driver information table signature. */
	sig = (*(u32 *)driv_inf_tab);
	if ((sig == 0x54504c24) || /* Rage LT pro */
		(sig == 0x544d5224) || /* Rage mobility */
		(sig == 0x54435824) || /* Rage XC */
		(sig == 0x544c5824)) { /* Rage XL */
		PRINTKI("BIOS contains driver information table.\n");
		lcd_ofs = (*(u16 *)(driv_inf_tab + 10));
		par->lcd_table = 0;
		if (lcd_ofs != 0) {
			par->lcd_table = bios_base + lcd_ofs;
		}
	}

	if (par->lcd_table != 0) {
		char model[24];
		char strbuf[16];
		char refresh_rates_buf[100];
		int id, tech, f, i, m, default_refresh_rate;
		char *txtcolour;
		char *txtmonitor;
		char *txtdual;
		char *txtformat;
		u16 width, height, panel_type, refresh_rates;
		u16 *lcdmodeptr;
		u32 format;
		u8 lcd_refresh_rates[16] = {50,56,60,67,70,72,75,76,85,90,100,120,140,150,160,200};
		/* The most important information is the panel size at
		 * offset 25 and 27, but there's some other nice information
		 * which we print to the screen.
		 */
		id = *(u8 *)par->lcd_table;
		strncpy(model,(char *)par->lcd_table+1,24);
		model[23]=0;

		width = par->lcd_width = *(u16 *)(par->lcd_table+25);
		height = par->lcd_height = *(u16 *)(par->lcd_table+27);
		panel_type = *(u16 *)(par->lcd_table+29);
		if (panel_type & 1)
			txtcolour = "colour";
		else
			txtcolour = "monochrome";
		if (panel_type & 2)
			txtdual = "dual (split) ";
		else
			txtdual = "";
		tech = (panel_type>>2) & 63;
		switch (tech) {
		case 0:
			txtmonitor = "passive matrix";
			break;
		case 1:
			txtmonitor = "active matrix";
			break;
		case 2:
			txtmonitor = "active addressed STN";
			break;
		case 3:
			txtmonitor = "EL";
			break;
		case 4:
			txtmonitor = "plasma";
			break;
		default:
			txtmonitor = "unknown";
		}
		format = *(u32 *)(par->lcd_table+57);
		if (tech == 0 || tech == 2) {
			switch (format & 7) {
			case 0:
				txtformat = "12 bit interface";
				break;
			case 1:
				txtformat = "16 bit interface";
				break;
			case 2:
				txtformat = "24 bit interface";
				break;
			default:
				txtformat = "unkown format";
			}
		} else {
			switch (format & 7) {
			case 0:
				txtformat = "8 colours";
				break;
			case 1:
				txtformat = "512 colours";
				break;
			case 2:
				txtformat = "4096 colours";
				break;
			case 4:
				txtformat = "262144 colours (LT mode)";
				break;
			case 5:
				txtformat = "16777216 colours";
				break;
			case 6:
				txtformat = "262144 colours (FDPI-2 mode)";
				break;
			default:
				txtformat = "unkown format";
			}
		}
		PRINTKI("%s%s %s monitor detected: %s\n",
			txtdual ,txtcolour, txtmonitor, model);
		PRINTKI("       id=%d, %dx%d pixels, %s\n",
			id, width, height, txtformat);
		refresh_rates_buf[0] = 0;
		refresh_rates = *(u16 *)(par->lcd_table+62);
		m = 1;
		f = 0;
		for (i=0;i<16;i++) {
			if (refresh_rates & m) {
				if (f == 0) {
					sprintf(strbuf, "%d", lcd_refresh_rates[i]);
					f++;
				} else {
					sprintf(strbuf, ",%d", lcd_refresh_rates[i]);
				}
				strcat(refresh_rates_buf,strbuf);
			}
			m = m << 1;
		}
		default_refresh_rate = (*(u8 *)(par->lcd_table+61) & 0xf0) >> 4;
		PRINTKI("       supports refresh rates [%s], default %d Hz\n",
			refresh_rates_buf, lcd_refresh_rates[default_refresh_rate]);
		par->lcd_refreshrate = lcd_refresh_rates[default_refresh_rate];
		/* We now need to determine the crtc parameters for the
		 * lcd monitor. This is tricky, because they are not stored
		 * individually in the BIOS. Instead, the BIOS contains a
		 * table of display modes that work for this monitor.
		 *
		 * The idea is that we search for a mode of the same dimensions
		 * as the dimensions of the lcd monitor. Say our lcd monitor
		 * is 800x600 pixels, we search for a 800x600 monitor.
		 * The CRTC parameters we find here are the ones that we need
		 * to use to simulate other resolutions on the lcd screen.
		 */
		lcdmodeptr = (u16 *)(par->lcd_table + 64);
		while (*lcdmodeptr != 0) {
			u32 modeptr;
			u16 mwidth, mheight, lcd_hsync_start, lcd_vsync_start;
			modeptr = bios_base + *lcdmodeptr;

			mwidth = *((u16 *)(modeptr+0));
			mheight = *((u16 *)(modeptr+2));

			if (mwidth == width && mheight == height) {
				par->lcd_pixclock = 100000000 / *((u16 *)(modeptr+9));
				par->lcd_htotal = *((u16 *)(modeptr+17)) & 511;
				par->lcd_hdisp = *((u16 *)(modeptr+19)) & 511;
				lcd_hsync_start = *((u16 *)(modeptr+21)) & 511;
				par->lcd_hsync_dly = (*((u16 *)(modeptr+21)) >> 9) & 7;
				par->lcd_hsync_len = *((u8 *)(modeptr+23)) & 63;

				par->lcd_vtotal = *((u16 *)(modeptr+24)) & 2047;
				par->lcd_vdisp = *((u16 *)(modeptr+26)) & 2047;
				lcd_vsync_start = *((u16 *)(modeptr+28)) & 2047;
				par->lcd_vsync_len = (*((u16 *)(modeptr+28)) >> 11) & 31;

				par->lcd_htotal = (par->lcd_htotal + 1) * 8;
				par->lcd_hdisp = (par->lcd_hdisp + 1) * 8;
				lcd_hsync_start = (lcd_hsync_start + 1) * 8;
				par->lcd_hsync_len = par->lcd_hsync_len * 8;

				par->lcd_vtotal++;
				par->lcd_vdisp++;
				lcd_vsync_start++;

				par->lcd_right_margin = lcd_hsync_start - par->lcd_hdisp;
				par->lcd_lower_margin = lcd_vsync_start - par->lcd_vdisp;
				par->lcd_hblank_len = par->lcd_htotal - par->lcd_hdisp;
				par->lcd_vblank_len = par->lcd_vtotal - par->lcd_vdisp;
				break;
			}

			lcdmodeptr++;
		}
		if (*lcdmodeptr == 0) {
			PRINTKE("LCD monitor CRTC parameters not found!!!\n");
			/* To do: Switch to CRT if possible. */
		} else {
			PRINTKI("       LCD CRTC parameters: %d.%d  %d %d %d %d  %d %d %d %d\n",
				1000000 / par->lcd_pixclock, 1000000 % par->lcd_pixclock,
				par->lcd_hdisp,
				par->lcd_hdisp + par->lcd_right_margin,
				par->lcd_hdisp + par->lcd_right_margin
					+ par->lcd_hsync_dly + par->lcd_hsync_len,
				par->lcd_htotal,
				par->lcd_vdisp,
				par->lcd_vdisp + par->lcd_lower_margin,
				par->lcd_vdisp + par->lcd_lower_margin + par->lcd_vsync_len,
				par->lcd_vtotal);
			PRINTKI("                          : %d %d %d %d %d %d %d %d %d\n",
				par->lcd_pixclock,
				par->lcd_hblank_len - (par->lcd_right_margin +
					par->lcd_hsync_dly + par->lcd_hsync_len),
				par->lcd_hdisp,
				par->lcd_right_margin,
				par->lcd_hsync_len,
				par->lcd_vblank_len - (par->lcd_lower_margin + par->lcd_vsync_len),
				par->lcd_vdisp,
				par->lcd_lower_margin,
				par->lcd_vsync_len);
		}
	}
}
#endif /* CONFIG_FB_ATY_GENERIC_LCD */

static int __devinit init_from_bios(struct atyfb_par *par)
{
	u32 bios_base, rom_addr;
	int ret;

	rom_addr = 0xc0000 + ((aty_ld_le32(SCRATCH_REG1, par) & 0x7f) << 11);
	bios_base = (unsigned long)ioremap(rom_addr, 0x10000);

	/* The BIOS starts with 0xaa55. */
	if (*((u16 *)bios_base) == 0xaa55) {

		u8 *bios_ptr;
		u16 rom_table_offset, freq_table_offset;
		PLL_BLOCK_MACH64 pll_block;

		PRINTKI("Mach64 BIOS is located at %x, mapped at %x.\n", rom_addr, bios_base);

		/* check for frequncy table */
		bios_ptr = (u8*)bios_base;
		rom_table_offset = (u16)(bios_ptr[0x48] | (bios_ptr[0x49] << 8));
		freq_table_offset = bios_ptr[rom_table_offset + 16] | (bios_ptr[rom_table_offset + 17] << 8);
		memcpy(&pll_block, bios_ptr + freq_table_offset, sizeof(PLL_BLOCK_MACH64));

		PRINTKI("BIOS frequency table:\n");
		PRINTKI("PCLK_min_freq %d, PCLK_max_freq %d, ref_freq %d, ref_divider %d\n",
			pll_block.PCLK_min_freq, pll_block.PCLK_max_freq,
			pll_block.ref_freq, pll_block.ref_divider);
		PRINTKI("MCLK_pwd %d, MCLK_max_freq %d, XCLK_max_freq %d, SCLK_freq %d\n",
			pll_block.MCLK_pwd, pll_block.MCLK_max_freq,
			pll_block.XCLK_max_freq, pll_block.SCLK_freq);

		par->pll_limits.pll_min = pll_block.PCLK_min_freq/100;
		par->pll_limits.pll_max = pll_block.PCLK_max_freq/100;
		par->pll_limits.ref_clk = pll_block.ref_freq/100;
		par->pll_limits.ref_div = pll_block.ref_divider;
		par->pll_limits.sclk = pll_block.SCLK_freq/100;
		par->pll_limits.mclk = pll_block.MCLK_max_freq/100;
		par->pll_limits.mclk_pm = pll_block.MCLK_pwd/100;
		par->pll_limits.xclk = pll_block.XCLK_max_freq/100;
#ifdef CONFIG_FB_ATY_GENERIC_LCD
		aty_init_lcd(par, bios_base);
#endif
		ret = 0;
	} else {
		PRINTKE("no BIOS frequency table found, use parameters\n");
		ret = -ENXIO;
	}
	iounmap((void* __iomem )bios_base);

	return ret;
}
#endif /* __i386__ */

static int __devinit atyfb_setup_generic(struct pci_dev *pdev, struct fb_info *info, unsigned long addr)
{
	struct atyfb_par *par = info->par;
	u16 tmp;
	unsigned long raddr;
	struct resource *rrp;
	int ret = 0;

	raddr = addr + 0x7ff000UL;
	rrp = &pdev->resource[2];
	if ((rrp->flags & IORESOURCE_MEM) && request_mem_region(rrp->start, rrp->end - rrp->start + 1, "atyfb")) {
		par->aux_start = rrp->start;
		par->aux_size = rrp->end - rrp->start + 1;
		raddr = rrp->start;
		PRINTKI("using auxiliary register aperture\n");
	}

	info->fix.mmio_start = raddr;
	par->ati_regbase = ioremap(info->fix.mmio_start, 0x1000);
	if (par->ati_regbase == 0)
		return -ENOMEM;

	info->fix.mmio_start += par->aux_start ? 0x400 : 0xc00;
	par->ati_regbase += par->aux_start ? 0x400 : 0xc00;

	/*
	 * Enable memory-space accesses using config-space
	 * command register.
	 */
	pci_read_config_word(pdev, PCI_COMMAND, &tmp);
	if (!(tmp & PCI_COMMAND_MEMORY)) {
		tmp |= PCI_COMMAND_MEMORY;
		pci_write_config_word(pdev, PCI_COMMAND, tmp);
	}
#ifdef __BIG_ENDIAN
	/* Use the big-endian aperture */
	addr += 0x800000;
#endif

	/* Map in frame buffer */
	info->fix.smem_start = addr;
	info->screen_base = ioremap(addr, 0x800000);
	if (info->screen_base == NULL) {
		ret = -ENOMEM;
		goto atyfb_setup_generic_fail;
	}

	if((ret = correct_chipset(par)))
		goto atyfb_setup_generic_fail;
#ifdef __i386__
	if((ret = init_from_bios(par)))
		goto atyfb_setup_generic_fail;
#endif
	if (!(aty_ld_le32(CRTC_GEN_CNTL, par) & CRTC_EXT_DISP_EN))
		par->clk_wr_offset = (inb(R_GENMO) & 0x0CU) >> 2;
	else
		par->clk_wr_offset = aty_ld_8(CLOCK_CNTL, par) & 0x03U;

	/* according to ATI, we should use clock 3 for acelerated mode */
	par->clk_wr_offset = 3;

	return 0;

atyfb_setup_generic_fail:
	iounmap(par->ati_regbase);
	par->ati_regbase = NULL;
	return ret;
}

#endif /* !__sparc__ */

static int __devinit atyfb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	unsigned long addr, res_start, res_size;
	struct fb_info *info;
	struct resource *rp;
	struct atyfb_par *par;
	int i, rc = -ENOMEM;

	for (i = sizeof(aty_chips) / sizeof(*aty_chips) - 1; i >= 0; i--)
		if (pdev->device == aty_chips[i].pci_id)
			break;

	if (i < 0)
		return -ENODEV;

	/* Enable device in PCI config */
	if (pci_enable_device(pdev)) {
		PRINTKE("Cannot enable PCI device\n");
		return -ENXIO;
	}

	/* Find which resource to use */
	rp = &pdev->resource[0];
	if (rp->flags & IORESOURCE_IO)
		rp = &pdev->resource[1];
	addr = rp->start;
	if (!addr)
		return -ENXIO;

	/* Reserve space */
	res_start = rp->start;
	res_size = rp->end - rp->start + 1;
	if (!request_mem_region (res_start, res_size, "atyfb"))
		return -EBUSY;

        /* Allocate framebuffer */
	info = framebuffer_alloc(sizeof(struct atyfb_par), &pdev->dev);
	if (!info) {
		PRINTKE("atyfb_pci_probe() can't alloc fb_info\n");
		return -ENOMEM;
	}
	par = info->par;
	info->fix = atyfb_fix;
	info->device = &pdev->dev;
	par->pci_id = aty_chips[i].pci_id;
	par->res_start = res_start;
	par->res_size = res_size;
	par->irq = pdev->irq;

	/* Setup "info" structure */
#ifdef __sparc__
	rc = atyfb_setup_sparc(pdev, info, addr);
#else
	rc = atyfb_setup_generic(pdev, info, addr);
#endif
	if (rc)
		goto err_release_mem;

	pci_set_drvdata(pdev, info);

	/* Init chip & register framebuffer */
	if (aty_init(info, "PCI"))
		goto err_release_io;

#ifdef __sparc__
	if (!prom_palette)
		prom_palette = atyfb_palette;

	/*
	 * Add /dev/fb mmap values.
	 */
	par->mmap_map[0].voff = 0x8000000000000000UL;
	par->mmap_map[0].poff = (unsigned long) info->screen_base & PAGE_MASK;
	par->mmap_map[0].size = info->fix.smem_len;
	par->mmap_map[0].prot_mask = _PAGE_CACHE;
	par->mmap_map[0].prot_flag = _PAGE_E;
	par->mmap_map[1].voff = par->mmap_map[0].voff + info->fix.smem_len;
	par->mmap_map[1].poff = (long)par->ati_regbase & PAGE_MASK;
	par->mmap_map[1].size = PAGE_SIZE;
	par->mmap_map[1].prot_mask = _PAGE_CACHE;
	par->mmap_map[1].prot_flag = _PAGE_E;
#endif /* __sparc__ */

	return 0;

err_release_io:
#ifdef __sparc__
	kfree(par->mmap_map);
#else
	if (par->ati_regbase)
		iounmap(par->ati_regbase);
	if (info->screen_base)
		iounmap(info->screen_base);
#endif
err_release_mem:
	if (par->aux_start)
		release_mem_region(par->aux_start, par->aux_size);

	release_mem_region(par->res_start, par->res_size);
	framebuffer_release(info);

	return rc;
}

#endif /* CONFIG_PCI */

#ifdef CONFIG_ATARI

static int __devinit atyfb_atari_probe(void)
{
	struct aty_par *par;
	struct fb_info *info;
	int m64_num;
	u32 clock_r;

	for (m64_num = 0; m64_num < mach64_count; m64_num++) {
		if (!phys_vmembase[m64_num] || !phys_size[m64_num] ||
		    !phys_guiregbase[m64_num]) {
		    PRINTKI("phys_*[%d] parameters not set => returning early. \n", m64_num);
			continue;
		}

		info = framebuffer_alloc(sizeof(struct atyfb_par), NULL);
		if (!info) {
			PRINTKE("atyfb_atari_probe() can't alloc fb_info\n");
			return -ENOMEM;
		}
		par = info->par;

		info->fix = atyfb_fix;

		par->irq = (unsigned int) -1; /* something invalid */

		/*
		 *  Map the video memory (physical address given) to somewhere in the
		 *  kernel address space.
		 */
		info->screen_base = ioremap(phys_vmembase[m64_num], phys_size[m64_num]);
		info->fix.smem_start = (unsigned long)info->screen_base; /* Fake! */
		par->ati_regbase = ioremap(phys_guiregbase[m64_num], 0x10000) +
						0xFC00ul;
		info->fix.mmio_start = (unsigned long)par->ati_regbase; /* Fake! */

		aty_st_le32(CLOCK_CNTL, 0x12345678, par);
		clock_r = aty_ld_le32(CLOCK_CNTL, par);

		switch (clock_r & 0x003F) {
		case 0x12:
			par->clk_wr_offset = 3; /*  */
			break;
		case 0x34:
			par->clk_wr_offset = 2; /* Medusa ST-IO ISA Adapter etc. */
			break;
		case 0x16:
			par->clk_wr_offset = 1; /*  */
			break;
		case 0x38:
			par->clk_wr_offset = 0; /* Panther 1 ISA Adapter (Gerald) */
			break;
		}

		if (aty_init(info, "ISA bus")) {
			framebuffer_release(info);
			/* This is insufficient! kernel_map has added two large chunks!! */
			return -ENXIO;
		}
	}
}

#endif /* CONFIG_ATARI */

static void __devexit atyfb_remove(struct fb_info *info)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;

	/* restore video mode */
	aty_set_crtc(par, &saved_crtc);
	par->pll_ops->set_pll(info, &saved_pll);

	unregister_framebuffer(info);

#ifdef CONFIG_MTRR
	if (par->mtrr_reg >= 0) {
	    mtrr_del(par->mtrr_reg, 0, 0);
	    par->mtrr_reg = -1;
	}
	if (par->mtrr_aper >= 0) {
	    mtrr_del(par->mtrr_aper, 0, 0);
	    par->mtrr_aper = -1;
	}
#endif
#ifndef __sparc__
	if (par->ati_regbase)
		iounmap(par->ati_regbase);
	if (info->screen_base)
		iounmap(info->screen_base);
#ifdef __BIG_ENDIAN
	if (info->sprite.addr)
		iounmap(info->sprite.addr);
#endif
#endif
#ifdef __sparc__
	kfree(par->mmap_map);
#endif
	if (par->aux_start)
		release_mem_region(par->aux_start, par->aux_size);

	if (par->res_start)
		release_mem_region(par->res_start, par->res_size);

	framebuffer_release(info);
}

#ifdef CONFIG_PCI

static void __devexit atyfb_pci_remove(struct pci_dev *pdev)
{
	struct fb_info *info = pci_get_drvdata(pdev);

	atyfb_remove(info);
}

/*
 * This driver uses its own matching table. That will be more difficult
 * to fix, so for now, we just match against any ATI ID and let the
 * probe() function find out what's up. That also mean we don't have
 * a module ID table though.
 */
static struct pci_device_id atyfb_pci_tbl[] = {
	{ PCI_VENDOR_ID_ATI, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
	  PCI_BASE_CLASS_DISPLAY << 16, 0xff0000, 0 },
	{ 0, }
};

static struct pci_driver atyfb_driver = {
	.name		= "atyfb",
	.id_table	= atyfb_pci_tbl,
	.probe		= atyfb_pci_probe,
	.remove		= __devexit_p(atyfb_pci_remove),
#ifdef CONFIG_PM
	.suspend	= atyfb_pci_suspend,
	.resume		= atyfb_pci_resume,
#endif /* CONFIG_PM */
};

#endif /* CONFIG_PCI */

#ifndef MODULE
static int __init atyfb_setup(char *options)
{
	char *this_opt;

	if (!options || !*options)
		return 0;

	while ((this_opt = strsep(&options, ",")) != NULL) {
		if (!strncmp(this_opt, "noaccel", 7)) {
			noaccel = 1;
#ifdef CONFIG_MTRR
		} else if (!strncmp(this_opt, "nomtrr", 6)) {
			nomtrr = 1;
#endif
		} else if (!strncmp(this_opt, "vram:", 5))
			vram = simple_strtoul(this_opt + 5, NULL, 0);
		else if (!strncmp(this_opt, "pll:", 4))
			pll = simple_strtoul(this_opt + 4, NULL, 0);
		else if (!strncmp(this_opt, "mclk:", 5))
			mclk = simple_strtoul(this_opt + 5, NULL, 0);
		else if (!strncmp(this_opt, "xclk:", 5))
			xclk = simple_strtoul(this_opt+5, NULL, 0);
		else if (!strncmp(this_opt, "comp_sync:", 10))
			comp_sync = simple_strtoul(this_opt+10, NULL, 0);
#ifdef CONFIG_PPC
		else if (!strncmp(this_opt, "vmode:", 6)) {
			unsigned int vmode =
			    simple_strtoul(this_opt + 6, NULL, 0);
			if (vmode > 0 && vmode <= VMODE_MAX)
				default_vmode = vmode;
		} else if (!strncmp(this_opt, "cmode:", 6)) {
			unsigned int cmode =
			    simple_strtoul(this_opt + 6, NULL, 0);
			switch (cmode) {
			case 0:
			case 8:
				default_cmode = CMODE_8;
				break;
			case 15:
			case 16:
				default_cmode = CMODE_16;
				break;
			case 24:
			case 32:
				default_cmode = CMODE_32;
				break;
			}
		}
#endif
#ifdef CONFIG_ATARI
		/*
		 * Why do we need this silly Mach64 argument?
		 * We are already here because of mach64= so its redundant.
		 */
		else if (MACH_IS_ATARI
			 && (!strncmp(this_opt, "Mach64:", 7))) {
			static unsigned char m64_num;
			static char mach64_str[80];
			strlcpy(mach64_str, this_opt + 7, sizeof(mach64_str));
			if (!store_video_par(mach64_str, m64_num)) {
				m64_num++;
				mach64_count = m64_num;
			}
		}
#endif
		else
			mode = this_opt;
	}
	return 0;
}
#endif  /*  MODULE  */

static int __init atyfb_init(void)
{
#ifndef MODULE
    char *option = NULL;

    if (fb_get_options("atyfb", &option))
	return -ENODEV;
    atyfb_setup(option);
#endif

#ifdef CONFIG_PCI
    pci_register_driver(&atyfb_driver);
#endif
#ifdef CONFIG_ATARI
    atyfb_atari_probe();
#endif
    return 0;
}

static void __exit atyfb_exit(void)
{
#ifdef CONFIG_PCI
	pci_unregister_driver(&atyfb_driver);
#endif
}

module_init(atyfb_init);
module_exit(atyfb_exit);

MODULE_DESCRIPTION("FBDev driver for ATI Mach64 cards");
MODULE_LICENSE("GPL");
module_param(noaccel, bool, 0);
MODULE_PARM_DESC(noaccel, "bool: disable acceleration");
module_param(vram, int, 0);
MODULE_PARM_DESC(vram, "int: override size of video ram");
module_param(pll, int, 0);
MODULE_PARM_DESC(pll, "int: override video clock");
module_param(mclk, int, 0);
MODULE_PARM_DESC(mclk, "int: override memory clock");
module_param(xclk, int, 0);
MODULE_PARM_DESC(xclk, "int: override accelerated engine clock");
module_param(comp_sync, int, 0);
MODULE_PARM_DESC(comp_sync,
		 "Set composite sync signal to low (0) or high (1)");
module_param(mode, charp, 0);
MODULE_PARM_DESC(mode, "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
#ifdef CONFIG_MTRR
module_param(nomtrr, bool, 0);
MODULE_PARM_DESC(nomtrr, "bool: disable use of MTRR registers");
#endif