Free Electrons

Embedded Linux Experts

   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
/*
 * Edgeport USB Serial Converter driver
 *
 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 * Supports the following devices:
 *	Edgeport/4
 *	Edgeport/4t
 *	Edgeport/2
 *	Edgeport/4i
 *	Edgeport/2i
 *	Edgeport/421
 *	Edgeport/21
 *	Rapidport/4
 *	Edgeport/8
 *	Edgeport/2D8
 *	Edgeport/4D8
 *	Edgeport/8i
 *
 * For questions or problems with this driver, contact Inside Out
 * Networks technical support, or Peter Berger <pberger@brimson.com>,
 * or Al Borchers <alborchers@steinerpoint.com>.
 *
 */

#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/serial.h>
#include <linux/ioctl.h>
#include <linux/wait.h>
#include <linux/firmware.h>
#include <linux/ihex.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include "io_edgeport.h"
#include "io_ionsp.h"		/* info for the iosp messages */
#include "io_16654.h"		/* 16654 UART defines */

/*
 * Version Information
 */
#define DRIVER_VERSION "v2.7"
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
#define DRIVER_DESC "Edgeport USB Serial Driver"

#define MAX_NAME_LEN		64

#define CHASE_TIMEOUT		(5*HZ)		/* 5 seconds */
#define OPEN_TIMEOUT		(5*HZ)		/* 5 seconds */
#define COMMAND_TIMEOUT		(5*HZ)		/* 5 seconds */

/* receive port state */
enum RXSTATE {
	EXPECT_HDR1 = 0,    /* Expect header byte 1 */
	EXPECT_HDR2 = 1,    /* Expect header byte 2 */
	EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
	EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
};


/* Transmit Fifo
 * This Transmit queue is an extension of the edgeport Rx buffer.
 * The maximum amount of data buffered in both the edgeport
 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
 */
struct TxFifo {
	unsigned int	head;	/* index to head pointer (write) */
	unsigned int	tail;	/* index to tail pointer (read)  */
	unsigned int	count;	/* Bytes in queue */
	unsigned int	size;	/* Max size of queue (equal to Max number of TxCredits) */
	unsigned char	*fifo;	/* allocated Buffer */
};

/* This structure holds all of the local port information */
struct edgeport_port {
	__u16			txCredits;		/* our current credits for this port */
	__u16			maxTxCredits;		/* the max size of the port */

	struct TxFifo		txfifo;			/* transmit fifo -- size will be maxTxCredits */
	struct urb		*write_urb;		/* write URB for this port */
	bool			write_in_progress;	/* 'true' while a write URB is outstanding */
	spinlock_t		ep_lock;

	__u8			shadowLCR;		/* last LCR value received */
	__u8			shadowMCR;		/* last MCR value received */
	__u8			shadowMSR;		/* last MSR value received */
	__u8			shadowLSR;		/* last LSR value received */
	__u8			shadowXonChar;		/* last value set as XON char in Edgeport */
	__u8			shadowXoffChar;		/* last value set as XOFF char in Edgeport */
	__u8			validDataMask;
	__u32			baudRate;

	bool			open;
	bool			openPending;
	bool			commandPending;
	bool			closePending;
	bool			chaseResponsePending;

	wait_queue_head_t	wait_chase;		/* for handling sleeping while waiting for chase to finish */
	wait_queue_head_t	wait_open;		/* for handling sleeping while waiting for open to finish */
	wait_queue_head_t	wait_command;		/* for handling sleeping while waiting for command to finish */
	wait_queue_head_t	delta_msr_wait;		/* for handling sleeping while waiting for msr change to happen */

	struct async_icount	icount;
	struct usb_serial_port	*port;			/* loop back to the owner of this object */
};


/* This structure holds all of the individual device information */
struct edgeport_serial {
	char			name[MAX_NAME_LEN+2];		/* string name of this device */

	struct edge_manuf_descriptor	manuf_descriptor;	/* the manufacturer descriptor */
	struct edge_boot_descriptor	boot_descriptor;	/* the boot firmware descriptor */
	struct edgeport_product_info	product_info;		/* Product Info */
	struct edge_compatibility_descriptor epic_descriptor;	/* Edgeport compatible descriptor */
	int			is_epic;			/* flag if EPiC device or not */

	__u8			interrupt_in_endpoint;		/* the interrupt endpoint handle */
	unsigned char		*interrupt_in_buffer;		/* the buffer we use for the interrupt endpoint */
	struct urb		*interrupt_read_urb;		/* our interrupt urb */

	__u8			bulk_in_endpoint;		/* the bulk in endpoint handle */
	unsigned char		*bulk_in_buffer;		/* the buffer we use for the bulk in endpoint */
	struct urb		*read_urb;			/* our bulk read urb */
	bool			read_in_progress;
	spinlock_t		es_lock;

	__u8			bulk_out_endpoint;		/* the bulk out endpoint handle */

	__s16			rxBytesAvail;			/* the number of bytes that we need to read from this device */

	enum RXSTATE		rxState;			/* the current state of the bulk receive processor */
	__u8			rxHeader1;			/* receive header byte 1 */
	__u8			rxHeader2;			/* receive header byte 2 */
	__u8			rxHeader3;			/* receive header byte 3 */
	__u8			rxPort;				/* the port that we are currently receiving data for */
	__u8			rxStatusCode;			/* the receive status code */
	__u8			rxStatusParam;			/* the receive status paramater */
	__s16			rxBytesRemaining;		/* the number of port bytes left to read */
	struct usb_serial	*serial;			/* loop back to the owner of this object */
};

/* baud rate information */
struct divisor_table_entry {
	__u32   BaudRate;
	__u16  Divisor;
};

/*
 * Define table of divisors for Rev A EdgePort/4 hardware
 * These assume a 3.6864MHz crystal, the standard /16, and
 * MCR.7 = 0.
 */

static const struct divisor_table_entry divisor_table[] = {
	{   50,		4608},
	{   75,		3072},
	{   110,	2095},	/* 2094.545455 => 230450   => .0217 % over */
	{   134,	1713},	/* 1713.011152 => 230398.5 => .00065% under */
	{   150,	1536},
	{   300,	768},
	{   600,	384},
	{   1200,	192},
	{   1800,	128},
	{   2400,	96},
	{   4800,	48},
	{   7200,	32},
	{   9600,	24},
	{   14400,	16},
	{   19200,	12},
	{   38400,	6},
	{   57600,	4},
	{   115200,	2},
	{   230400,	1},
};

/* local variables */
static bool debug;

/* Number of outstanding Command Write Urbs */
static atomic_t CmdUrbs = ATOMIC_INIT(0);


/* local function prototypes */

/* function prototypes for all URB callbacks */
static void edge_interrupt_callback(struct urb *urb);
static void edge_bulk_in_callback(struct urb *urb);
static void edge_bulk_out_data_callback(struct urb *urb);
static void edge_bulk_out_cmd_callback(struct urb *urb);

/* function prototypes for the usbserial callbacks */
static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
static void edge_close(struct usb_serial_port *port);
static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
					const unsigned char *buf, int count);
static int edge_write_room(struct tty_struct *tty);
static int edge_chars_in_buffer(struct tty_struct *tty);
static void edge_throttle(struct tty_struct *tty);
static void edge_unthrottle(struct tty_struct *tty);
static void edge_set_termios(struct tty_struct *tty,
					struct usb_serial_port *port,
					struct ktermios *old_termios);
static int  edge_ioctl(struct tty_struct *tty,
					unsigned int cmd, unsigned long arg);
static void edge_break(struct tty_struct *tty, int break_state);
static int  edge_tiocmget(struct tty_struct *tty);
static int  edge_tiocmset(struct tty_struct *tty,
					unsigned int set, unsigned int clear);
static int  edge_get_icount(struct tty_struct *tty,
				struct serial_icounter_struct *icount);
static int  edge_startup(struct usb_serial *serial);
static void edge_disconnect(struct usb_serial *serial);
static void edge_release(struct usb_serial *serial);

#include "io_tables.h"	/* all of the devices that this driver supports */

/* function prototypes for all of our local functions */

static void  process_rcvd_data(struct edgeport_serial *edge_serial,
				unsigned char *buffer, __u16 bufferLength);
static void process_rcvd_status(struct edgeport_serial *edge_serial,
				__u8 byte2, __u8 byte3);
static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
				unsigned char *data, int length);
static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
				__u8 lsr, __u8 data);
static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
				__u8 param);
static int  calc_baud_rate_divisor(int baud_rate, int *divisor);
static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
				int baudRate);
static void change_port_settings(struct tty_struct *tty,
				struct edgeport_port *edge_port,
				struct ktermios *old_termios);
static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
				__u8 regNum, __u8 regValue);
static int  write_cmd_usb(struct edgeport_port *edge_port,
				unsigned char *buffer, int writeLength);
static void send_more_port_data(struct edgeport_serial *edge_serial,
				struct edgeport_port *edge_port);

static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
					__u16 length, const __u8 *data);
static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
						__u16 length, __u8 *data);
static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
					__u16 length, const __u8 *data);
static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
static void get_boot_desc(struct edgeport_serial *edge_serial);
static void load_application_firmware(struct edgeport_serial *edge_serial);

static void unicode_to_ascii(char *string, int buflen,
				__le16 *unicode, int unicode_size);


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

/************************************************************************
 *									*
 * update_edgeport_E2PROM()	Compare current versions of		*
 *				Boot ROM and Manufacture 		*
 *				Descriptors with versions		*
 *				embedded in this driver			*
 *									*
 ************************************************************************/
static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
{
	__u32 BootCurVer;
	__u32 BootNewVer;
	__u8 BootMajorVersion;
	__u8 BootMinorVersion;
	__u16 BootBuildNumber;
	__u32 Bootaddr;
	const struct ihex_binrec *rec;
	const struct firmware *fw;
	const char *fw_name;
	int response;

	switch (edge_serial->product_info.iDownloadFile) {
	case EDGE_DOWNLOAD_FILE_I930:
		fw_name	= "edgeport/boot.fw";
		break;
	case EDGE_DOWNLOAD_FILE_80251:
		fw_name	= "edgeport/boot2.fw";
		break;
	default:
		return;
	}

	response = request_ihex_firmware(&fw, fw_name,
					 &edge_serial->serial->dev->dev);
	if (response) {
		printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
		       fw_name, response);
		return;
	}

	rec = (const struct ihex_binrec *)fw->data;
	BootMajorVersion = rec->data[0];
	BootMinorVersion = rec->data[1];
	BootBuildNumber = (rec->data[2] << 8) | rec->data[3];

	/* Check Boot Image Version */
	BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
		     (edge_serial->boot_descriptor.MinorVersion << 16) +
		      le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);

	BootNewVer = (BootMajorVersion << 24) +
		     (BootMinorVersion << 16) +
		      BootBuildNumber;

	dbg("Current Boot Image version %d.%d.%d",
	    edge_serial->boot_descriptor.MajorVersion,
	    edge_serial->boot_descriptor.MinorVersion,
	    le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));


	if (BootNewVer > BootCurVer) {
		dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
		    edge_serial->boot_descriptor.MajorVersion,
		    edge_serial->boot_descriptor.MinorVersion,
		    le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
		    BootMajorVersion, BootMinorVersion, BootBuildNumber);

		dbg("Downloading new Boot Image");

		for (rec = ihex_next_binrec(rec); rec;
		     rec = ihex_next_binrec(rec)) {
			Bootaddr = be32_to_cpu(rec->addr);
			response = rom_write(edge_serial->serial,
					     Bootaddr >> 16,
					     Bootaddr & 0xFFFF,
					     be16_to_cpu(rec->len),
					     &rec->data[0]);
			if (response < 0) {
				dev_err(&edge_serial->serial->dev->dev,
					"rom_write failed (%x, %x, %d)\n",
					Bootaddr >> 16, Bootaddr & 0xFFFF,
					be16_to_cpu(rec->len));
				break;
			}
		}
	} else {
		dbg("Boot Image -- already up to date");
	}
	release_firmware(fw);
}

#if 0
/************************************************************************
 *
 *  Get string descriptor from device
 *
 ************************************************************************/
static int get_string_desc(struct usb_device *dev, int Id,
				struct usb_string_descriptor **pRetDesc)
{
	struct usb_string_descriptor StringDesc;
	struct usb_string_descriptor *pStringDesc;

	dbg("%s - USB String ID = %d", __func__, Id);

	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
						sizeof(StringDesc)))
		return 0;

	pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
	if (!pStringDesc)
		return -1;

	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
							StringDesc.bLength)) {
		kfree(pStringDesc);
		return -1;
	}

	*pRetDesc = pStringDesc;
	return 0;
}
#endif

static void dump_product_info(struct edgeport_product_info *product_info)
{
	/* Dump Product Info structure */
	dbg("**Product Information:");
	dbg("  ProductId             %x", product_info->ProductId);
	dbg("  NumPorts              %d", product_info->NumPorts);
	dbg("  ProdInfoVer           %d", product_info->ProdInfoVer);
	dbg("  IsServer              %d", product_info->IsServer);
	dbg("  IsRS232               %d", product_info->IsRS232);
	dbg("  IsRS422               %d", product_info->IsRS422);
	dbg("  IsRS485               %d", product_info->IsRS485);
	dbg("  RomSize               %d", product_info->RomSize);
	dbg("  RamSize               %d", product_info->RamSize);
	dbg("  CpuRev                %x", product_info->CpuRev);
	dbg("  BoardRev              %x", product_info->BoardRev);
	dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
	    product_info->BootMinorVersion,
	    le16_to_cpu(product_info->BootBuildNumber));
	dbg("  FirmwareMajorVersion  %d.%d.%d",
			product_info->FirmwareMajorVersion,
			product_info->FirmwareMinorVersion,
			le16_to_cpu(product_info->FirmwareBuildNumber));
	dbg("  ManufactureDescDate   %d/%d/%d",
			product_info->ManufactureDescDate[0],
			product_info->ManufactureDescDate[1],
			product_info->ManufactureDescDate[2]+1900);
	dbg("  iDownloadFile         0x%x", product_info->iDownloadFile);
	dbg("  EpicVer               %d", product_info->EpicVer);
}

static void get_product_info(struct edgeport_serial *edge_serial)
{
	struct edgeport_product_info *product_info = &edge_serial->product_info;

	memset(product_info, 0, sizeof(struct edgeport_product_info));

	product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
	product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
	product_info->ProdInfoVer = 0;

	product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
	product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
	product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
	product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;

	product_info->BootMajorVersion =
				edge_serial->boot_descriptor.MajorVersion;
	product_info->BootMinorVersion =
				edge_serial->boot_descriptor.MinorVersion;
	product_info->BootBuildNumber =
				edge_serial->boot_descriptor.BuildNumber;

	memcpy(product_info->ManufactureDescDate,
			edge_serial->manuf_descriptor.DescDate,
			sizeof(edge_serial->manuf_descriptor.DescDate));

	/* check if this is 2nd generation hardware */
	if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
					    & ION_DEVICE_ID_80251_NETCHIP)
		product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
	else
		product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 
	/* Determine Product type and set appropriate flags */
	switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
	case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
	case ION_DEVICE_ID_EDGEPORT_4T:
	case ION_DEVICE_ID_EDGEPORT_4:
	case ION_DEVICE_ID_EDGEPORT_2:
	case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
	case ION_DEVICE_ID_EDGEPORT_8:
	case ION_DEVICE_ID_EDGEPORT_421:
	case ION_DEVICE_ID_EDGEPORT_21:
	case ION_DEVICE_ID_EDGEPORT_2_DIN:
	case ION_DEVICE_ID_EDGEPORT_4_DIN:
	case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
		product_info->IsRS232 = 1;
		break;

	case ION_DEVICE_ID_EDGEPORT_2I:	/* Edgeport/2 RS422/RS485 */
		product_info->IsRS422 = 1;
		product_info->IsRS485 = 1;
		break;

	case ION_DEVICE_ID_EDGEPORT_8I:	/* Edgeport/4 RS422 */
	case ION_DEVICE_ID_EDGEPORT_4I:	/* Edgeport/4 RS422 */
		product_info->IsRS422 = 1;
		break;
	}

	dump_product_info(product_info);
}

static int get_epic_descriptor(struct edgeport_serial *ep)
{
	int result;
	struct usb_serial *serial = ep->serial;
	struct edgeport_product_info *product_info = &ep->product_info;
	struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
	struct edge_compatibility_bits *bits;

	ep->is_epic = 0;
	result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
				 USB_REQUEST_ION_GET_EPIC_DESC,
				 0xC0, 0x00, 0x00,
				 &ep->epic_descriptor,
				 sizeof(struct edge_compatibility_descriptor),
				 300);

	dbg("%s result = %d", __func__, result);

	if (result > 0) {
		ep->is_epic = 1;
		memset(product_info, 0, sizeof(struct edgeport_product_info));

		product_info->NumPorts = epic->NumPorts;
		product_info->ProdInfoVer = 0;
		product_info->FirmwareMajorVersion = epic->MajorVersion;
		product_info->FirmwareMinorVersion = epic->MinorVersion;
		product_info->FirmwareBuildNumber = epic->BuildNumber;
		product_info->iDownloadFile = epic->iDownloadFile;
		product_info->EpicVer = epic->EpicVer;
		product_info->Epic = epic->Supports;
		product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
		dump_product_info(product_info);

		bits = &ep->epic_descriptor.Supports;
		dbg("**EPIC descriptor:");
		dbg("  VendEnableSuspend: %s", bits->VendEnableSuspend	? "TRUE": "FALSE");
		dbg("  IOSPOpen         : %s", bits->IOSPOpen		? "TRUE": "FALSE");
		dbg("  IOSPClose        : %s", bits->IOSPClose		? "TRUE": "FALSE");
		dbg("  IOSPChase        : %s", bits->IOSPChase		? "TRUE": "FALSE");
		dbg("  IOSPSetRxFlow    : %s", bits->IOSPSetRxFlow	? "TRUE": "FALSE");
		dbg("  IOSPSetTxFlow    : %s", bits->IOSPSetTxFlow	? "TRUE": "FALSE");
		dbg("  IOSPSetXChar     : %s", bits->IOSPSetXChar	? "TRUE": "FALSE");
		dbg("  IOSPRxCheck      : %s", bits->IOSPRxCheck	? "TRUE": "FALSE");
		dbg("  IOSPSetClrBreak  : %s", bits->IOSPSetClrBreak	? "TRUE": "FALSE");
		dbg("  IOSPWriteMCR     : %s", bits->IOSPWriteMCR	? "TRUE": "FALSE");
		dbg("  IOSPWriteLCR     : %s", bits->IOSPWriteLCR	? "TRUE": "FALSE");
		dbg("  IOSPSetBaudRate  : %s", bits->IOSPSetBaudRate	? "TRUE": "FALSE");
		dbg("  TrueEdgeport     : %s", bits->TrueEdgeport	? "TRUE": "FALSE");
	}

	return result;
}


/************************************************************************/
/************************************************************************/
/*            U S B  C A L L B A C K   F U N C T I O N S                */
/*            U S B  C A L L B A C K   F U N C T I O N S                */
/************************************************************************/
/************************************************************************/

/*****************************************************************************
 * edge_interrupt_callback
 *	this is the callback function for when we have received data on the
 *	interrupt endpoint.
 *****************************************************************************/
static void edge_interrupt_callback(struct urb *urb)
{
	struct edgeport_serial	*edge_serial = urb->context;
	struct edgeport_port *edge_port;
	struct usb_serial_port *port;
	struct tty_struct *tty;
	unsigned char *data = urb->transfer_buffer;
	int length = urb->actual_length;
	int bytes_avail;
	int position;
	int txCredits;
	int portNumber;
	int result;
	int status = urb->status;

	dbg("%s", __func__);

	switch (status) {
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
		dbg("%s - urb shutting down with status: %d",
						__func__, status);
		return;
	default:
		dbg("%s - nonzero urb status received: %d", __func__, status);
		goto exit;
	}

	/* process this interrupt-read even if there are no ports open */
	if (length) {
		usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
						__func__, length, data);

		if (length > 1) {
			bytes_avail = data[0] | (data[1] << 8);
			if (bytes_avail) {
				spin_lock(&edge_serial->es_lock);
				edge_serial->rxBytesAvail += bytes_avail;
				dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);

				if (edge_serial->rxBytesAvail > 0 &&
				    !edge_serial->read_in_progress) {
					dbg("%s - posting a read", __func__);
					edge_serial->read_in_progress = true;

					/* we have pending bytes on the
					   bulk in pipe, send a request */
					result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
					if (result) {
						dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
						edge_serial->read_in_progress = false;
					}
				}
				spin_unlock(&edge_serial->es_lock);
			}
		}
		/* grab the txcredits for the ports if available */
		position = 2;
		portNumber = 0;
		while ((position < length) &&
				(portNumber < edge_serial->serial->num_ports)) {
			txCredits = data[position] | (data[position+1] << 8);
			if (txCredits) {
				port = edge_serial->serial->port[portNumber];
				edge_port = usb_get_serial_port_data(port);
				if (edge_port->open) {
					spin_lock(&edge_port->ep_lock);
					edge_port->txCredits += txCredits;
					spin_unlock(&edge_port->ep_lock);
					dbg("%s - txcredits for port%d = %d",
							__func__, portNumber,
							edge_port->txCredits);

					/* tell the tty driver that something
					   has changed */
					tty = tty_port_tty_get(
						&edge_port->port->port);
					if (tty) {
						tty_wakeup(tty);
						tty_kref_put(tty);
					}
					/* Since we have more credit, check
					   if more data can be sent */
					send_more_port_data(edge_serial,
								edge_port);
				}
			}
			position += 2;
			++portNumber;
		}
	}

exit:
	result = usb_submit_urb(urb, GFP_ATOMIC);
	if (result)
		dev_err(&urb->dev->dev,
			"%s - Error %d submitting control urb\n",
						__func__, result);
}


/*****************************************************************************
 * edge_bulk_in_callback
 *	this is the callback function for when we have received data on the
 *	bulk in endpoint.
 *****************************************************************************/
static void edge_bulk_in_callback(struct urb *urb)
{
	struct edgeport_serial	*edge_serial = urb->context;
	unsigned char		*data = urb->transfer_buffer;
	int			retval;
	__u16			raw_data_length;
	int status = urb->status;

	dbg("%s", __func__);

	if (status) {
		dbg("%s - nonzero read bulk status received: %d",
		    __func__, status);
		edge_serial->read_in_progress = false;
		return;
	}

	if (urb->actual_length == 0) {
		dbg("%s - read bulk callback with no data", __func__);
		edge_serial->read_in_progress = false;
		return;
	}

	raw_data_length = urb->actual_length;

	usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
					__func__, raw_data_length, data);

	spin_lock(&edge_serial->es_lock);

	/* decrement our rxBytes available by the number that we just got */
	edge_serial->rxBytesAvail -= raw_data_length;

	dbg("%s - Received = %d, rxBytesAvail %d", __func__,
				raw_data_length, edge_serial->rxBytesAvail);

	process_rcvd_data(edge_serial, data, urb->actual_length);

	/* check to see if there's any more data for us to read */
	if (edge_serial->rxBytesAvail > 0) {
		dbg("%s - posting a read", __func__);
		retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
		if (retval) {
			dev_err(&urb->dev->dev,
				"%s - usb_submit_urb(read bulk) failed, "
				"retval = %d\n", __func__, retval);
			edge_serial->read_in_progress = false;
		}
	} else {
		edge_serial->read_in_progress = false;
	}

	spin_unlock(&edge_serial->es_lock);
}


/*****************************************************************************
 * edge_bulk_out_data_callback
 *	this is the callback function for when we have finished sending
 *	serial data on the bulk out endpoint.
 *****************************************************************************/
static void edge_bulk_out_data_callback(struct urb *urb)
{
	struct edgeport_port *edge_port = urb->context;
	struct tty_struct *tty;
	int status = urb->status;

	dbg("%s", __func__);

	if (status) {
		dbg("%s - nonzero write bulk status received: %d",
		    __func__, status);
	}

	tty = tty_port_tty_get(&edge_port->port->port);

	if (tty && edge_port->open) {
		/* let the tty driver wakeup if it has a special
		   write_wakeup function */
		tty_wakeup(tty);
	}
	tty_kref_put(tty);

	/* Release the Write URB */
	edge_port->write_in_progress = false;

	/* Check if more data needs to be sent */
	send_more_port_data((struct edgeport_serial *)
		(usb_get_serial_data(edge_port->port->serial)), edge_port);
}


/*****************************************************************************
 * BulkOutCmdCallback
 *	this is the callback function for when we have finished sending a
 *	command	on the bulk out endpoint.
 *****************************************************************************/
static void edge_bulk_out_cmd_callback(struct urb *urb)
{
	struct edgeport_port *edge_port = urb->context;
	struct tty_struct *tty;
	int status = urb->status;

	dbg("%s", __func__);

	atomic_dec(&CmdUrbs);
	dbg("%s - FREE URB %p (outstanding %d)", __func__,
					urb, atomic_read(&CmdUrbs));


	/* clean up the transfer buffer */
	kfree(urb->transfer_buffer);

	/* Free the command urb */
	usb_free_urb(urb);

	if (status) {
		dbg("%s - nonzero write bulk status received: %d",
							__func__, status);
		return;
	}

	/* Get pointer to tty */
	tty = tty_port_tty_get(&edge_port->port->port);

	/* tell the tty driver that something has changed */
	if (tty && edge_port->open)
		tty_wakeup(tty);
	tty_kref_put(tty);

	/* we have completed the command */
	edge_port->commandPending = false;
	wake_up(&edge_port->wait_command);
}


/*****************************************************************************
 * Driver tty interface functions
 *****************************************************************************/

/*****************************************************************************
 * SerialOpen
 *	this function is called by the tty driver when a port is opened
 *	If successful, we return 0
 *	Otherwise we return a negative error number.
 *****************************************************************************/
static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct usb_serial *serial;
	struct edgeport_serial *edge_serial;
	int response;

	dbg("%s - port %d", __func__, port->number);

	if (edge_port == NULL)
		return -ENODEV;

	/* see if we've set up our endpoint info yet (can't set it up
	   in edge_startup as the structures were not set up at that time.) */
	serial = port->serial;
	edge_serial = usb_get_serial_data(serial);
	if (edge_serial == NULL)
		return -ENODEV;
	if (edge_serial->interrupt_in_buffer == NULL) {
		struct usb_serial_port *port0 = serial->port[0];

		/* not set up yet, so do it now */
		edge_serial->interrupt_in_buffer =
					port0->interrupt_in_buffer;
		edge_serial->interrupt_in_endpoint =
					port0->interrupt_in_endpointAddress;
		edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
		edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
		edge_serial->bulk_in_endpoint =
					port0->bulk_in_endpointAddress;
		edge_serial->read_urb = port0->read_urb;
		edge_serial->bulk_out_endpoint =
					port0->bulk_out_endpointAddress;

		/* set up our interrupt urb */
		usb_fill_int_urb(edge_serial->interrupt_read_urb,
		      serial->dev,
		      usb_rcvintpipe(serial->dev,
				port0->interrupt_in_endpointAddress),
		      port0->interrupt_in_buffer,
		      edge_serial->interrupt_read_urb->transfer_buffer_length,
		      edge_interrupt_callback, edge_serial,
		      edge_serial->interrupt_read_urb->interval);

		/* set up our bulk in urb */
		usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
			usb_rcvbulkpipe(serial->dev,
				port0->bulk_in_endpointAddress),
			port0->bulk_in_buffer,
			edge_serial->read_urb->transfer_buffer_length,
			edge_bulk_in_callback, edge_serial);
		edge_serial->read_in_progress = false;

		/* start interrupt read for this edgeport
		 * this interrupt will continue as long
		 * as the edgeport is connected */
		response = usb_submit_urb(edge_serial->interrupt_read_urb,
								GFP_KERNEL);
		if (response) {
			dev_err(&port->dev,
				"%s - Error %d submitting control urb\n",
							__func__, response);
		}
	}

	/* initialize our wait queues */
	init_waitqueue_head(&edge_port->wait_open);
	init_waitqueue_head(&edge_port->wait_chase);
	init_waitqueue_head(&edge_port->delta_msr_wait);
	init_waitqueue_head(&edge_port->wait_command);

	/* initialize our icount structure */
	memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));

	/* initialize our port settings */
	edge_port->txCredits = 0;	/* Can't send any data yet */
	/* Must always set this bit to enable ints! */
	edge_port->shadowMCR = MCR_MASTER_IE;
	edge_port->chaseResponsePending = false;

	/* send a open port command */
	edge_port->openPending = true;
	edge_port->open        = false;
	response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);

	if (response < 0) {
		dev_err(&port->dev, "%s - error sending open port command\n",
								__func__);
		edge_port->openPending = false;
		return -ENODEV;
	}

	/* now wait for the port to be completely opened */
	wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
								OPEN_TIMEOUT);

	if (!edge_port->open) {
		/* open timed out */
		dbg("%s - open timedout", __func__);
		edge_port->openPending = false;
		return -ENODEV;
	}

	/* create the txfifo */
	edge_port->txfifo.head	= 0;
	edge_port->txfifo.tail	= 0;
	edge_port->txfifo.count	= 0;
	edge_port->txfifo.size	= edge_port->maxTxCredits;
	edge_port->txfifo.fifo	= kmalloc(edge_port->maxTxCredits, GFP_KERNEL);

	if (!edge_port->txfifo.fifo) {
		dbg("%s - no memory", __func__);
		edge_close(port);
		return -ENOMEM;
	}

	/* Allocate a URB for the write */
	edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
	edge_port->write_in_progress = false;

	if (!edge_port->write_urb) {
		dbg("%s - no memory", __func__);
		edge_close(port);
		return -ENOMEM;
	}

	dbg("%s(%d) - Initialize TX fifo to %d bytes",
			__func__, port->number, edge_port->maxTxCredits);

	dbg("%s exited", __func__);

	return 0;
}


/************************************************************************
 *
 * block_until_chase_response
 *
 *	This function will block the close until one of the following:
 *		1. Response to our Chase comes from Edgeport
 *		2. A timeout of 10 seconds without activity has expired
 *		   (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 *
 ************************************************************************/
static void block_until_chase_response(struct edgeport_port *edge_port)
{
	DEFINE_WAIT(wait);
	__u16 lastCredits;
	int timeout = 1*HZ;
	int loop = 10;

	while (1) {
		/* Save Last credits */
		lastCredits = edge_port->txCredits;

		/* Did we get our Chase response */
		if (!edge_port->chaseResponsePending) {
			dbg("%s - Got Chase Response", __func__);

			/* did we get all of our credit back? */
			if (edge_port->txCredits == edge_port->maxTxCredits) {
				dbg("%s - Got all credits", __func__);
				return;
			}
		}

		/* Block the thread for a while */
		prepare_to_wait(&edge_port->wait_chase, &wait,
						TASK_UNINTERRUPTIBLE);
		schedule_timeout(timeout);
		finish_wait(&edge_port->wait_chase, &wait);

		if (lastCredits == edge_port->txCredits) {
			/* No activity.. count down. */
			loop--;
			if (loop == 0) {
				edge_port->chaseResponsePending = false;
				dbg("%s - Chase TIMEOUT", __func__);
				return;
			}
		} else {
			/* Reset timeout value back to 10 seconds */
			dbg("%s - Last %d, Current %d", __func__,
					lastCredits, edge_port->txCredits);
			loop = 10;
		}
	}
}


/************************************************************************
 *
 * block_until_tx_empty
 *
 *	This function will block the close until one of the following:
 *		1. TX count are 0
 *		2. The edgeport has stopped
 *		3. A timeout of 3 seconds without activity has expired
 *
 ************************************************************************/
static void block_until_tx_empty(struct edgeport_port *edge_port)
{
	DEFINE_WAIT(wait);
	struct TxFifo *fifo = &edge_port->txfifo;
	__u32 lastCount;
	int timeout = HZ/10;
	int loop = 30;

	while (1) {
		/* Save Last count */
		lastCount = fifo->count;

		/* Is the Edgeport Buffer empty? */
		if (lastCount == 0) {
			dbg("%s - TX Buffer Empty", __func__);
			return;
		}

		/* Block the thread for a while */
		prepare_to_wait(&edge_port->wait_chase, &wait,
						TASK_UNINTERRUPTIBLE);
		schedule_timeout(timeout);
		finish_wait(&edge_port->wait_chase, &wait);

		dbg("%s wait", __func__);

		if (lastCount == fifo->count) {
			/* No activity.. count down. */
			loop--;
			if (loop == 0) {
				dbg("%s - TIMEOUT", __func__);
				return;
			}
		} else {
			/* Reset timeout value back to seconds */
			loop = 30;
		}
	}
}


/*****************************************************************************
 * edge_close
 *	this function is called by the tty driver when a port is closed
 *****************************************************************************/
static void edge_close(struct usb_serial_port *port)
{
	struct edgeport_serial *edge_serial;
	struct edgeport_port *edge_port;
	int status;

	dbg("%s - port %d", __func__, port->number);

	edge_serial = usb_get_serial_data(port->serial);
	edge_port = usb_get_serial_port_data(port);
	if (edge_serial == NULL || edge_port == NULL)
		return;

	/* block until tx is empty */
	block_until_tx_empty(edge_port);

	edge_port->closePending = true;

	if ((!edge_serial->is_epic) ||
	    ((edge_serial->is_epic) &&
	     (edge_serial->epic_descriptor.Supports.IOSPChase))) {
		/* flush and chase */
		edge_port->chaseResponsePending = true;

		dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
		if (status == 0)
			/* block until chase finished */
			block_until_chase_response(edge_port);
		else
			edge_port->chaseResponsePending = false;
	}

	if ((!edge_serial->is_epic) ||
	    ((edge_serial->is_epic) &&
	     (edge_serial->epic_descriptor.Supports.IOSPClose))) {
	       /* close the port */
		dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
		send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
	}

	/* port->close = true; */
	edge_port->closePending = false;
	edge_port->open = false;
	edge_port->openPending = false;

	usb_kill_urb(edge_port->write_urb);

	if (edge_port->write_urb) {
		/* if this urb had a transfer buffer already
				(old transfer) free it */
		kfree(edge_port->write_urb->transfer_buffer);
		usb_free_urb(edge_port->write_urb);
		edge_port->write_urb = NULL;
	}
	kfree(edge_port->txfifo.fifo);
	edge_port->txfifo.fifo = NULL;

	dbg("%s exited", __func__);
}

/*****************************************************************************
 * SerialWrite
 *	this function is called by the tty driver when data should be written
 *	to the port.
 *	If successful, we return the number of bytes written, otherwise we
 *	return a negative error number.
 *****************************************************************************/
static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
					const unsigned char *data, int count)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct TxFifo *fifo;
	int copySize;
	int bytesleft;
	int firsthalf;
	int secondhalf;
	unsigned long flags;

	dbg("%s - port %d", __func__, port->number);

	if (edge_port == NULL)
		return -ENODEV;

	/* get a pointer to the Tx fifo */
	fifo = &edge_port->txfifo;

	spin_lock_irqsave(&edge_port->ep_lock, flags);

	/* calculate number of bytes to put in fifo */
	copySize = min((unsigned int)count,
				(edge_port->txCredits - fifo->count));

	dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes",
			__func__, port->number, count,
			edge_port->txCredits - fifo->count, copySize);

	/* catch writes of 0 bytes which the tty driver likes to give us,
	   and when txCredits is empty */
	if (copySize == 0) {
		dbg("%s - copySize = Zero", __func__);
		goto finish_write;
	}

	/* queue the data
	 * since we can never overflow the buffer we do not have to check for a
	 * full condition
	 *
	 * the copy is done is two parts -- first fill to the end of the buffer
	 * then copy the reset from the start of the buffer
	 */
	bytesleft = fifo->size - fifo->head;
	firsthalf = min(bytesleft, copySize);
	dbg("%s - copy %d bytes of %d into fifo ", __func__,
					firsthalf, bytesleft);

	/* now copy our data */
	memcpy(&fifo->fifo[fifo->head], data, firsthalf);
	usb_serial_debug_data(debug, &port->dev, __func__,
					firsthalf, &fifo->fifo[fifo->head]);

	/* update the index and size */
	fifo->head  += firsthalf;
	fifo->count += firsthalf;

	/* wrap the index */
	if (fifo->head == fifo->size)
		fifo->head = 0;

	secondhalf = copySize-firsthalf;

	if (secondhalf) {
		dbg("%s - copy rest of data %d", __func__, secondhalf);
		memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
		usb_serial_debug_data(debug, &port->dev, __func__,
					secondhalf, &fifo->fifo[fifo->head]);
		/* update the index and size */
		fifo->count += secondhalf;
		fifo->head  += secondhalf;
		/* No need to check for wrap since we can not get to end of
		 * the fifo in this part
		 */
	}

finish_write:
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

	send_more_port_data((struct edgeport_serial *)
			usb_get_serial_data(port->serial), edge_port);

	dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
				copySize, edge_port->txCredits, fifo->count);

	return copySize;
}


/************************************************************************
 *
 * send_more_port_data()
 *
 *	This routine attempts to write additional UART transmit data
 *	to a port over the USB bulk pipe. It is called (1) when new
 *	data has been written to a port's TxBuffer from higher layers
 *	(2) when the peripheral sends us additional TxCredits indicating
 *	that it can accept more	Tx data for a given port; and (3) when
 *	a bulk write completes successfully and we want to see if we
 *	can transmit more.
 *
 ************************************************************************/
static void send_more_port_data(struct edgeport_serial *edge_serial,
					struct edgeport_port *edge_port)
{
	struct TxFifo	*fifo = &edge_port->txfifo;
	struct urb	*urb;
	unsigned char	*buffer;
	int		status;
	int		count;
	int		bytesleft;
	int		firsthalf;
	int		secondhalf;
	unsigned long	flags;

	dbg("%s(%d)", __func__, edge_port->port->number);

	spin_lock_irqsave(&edge_port->ep_lock, flags);

	if (edge_port->write_in_progress ||
	    !edge_port->open             ||
	    (fifo->count == 0)) {
		dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
				__func__, edge_port->port->number,
				fifo->count, edge_port->write_in_progress);
		goto exit_send;
	}

	/* since the amount of data in the fifo will always fit into the
	 * edgeport buffer we do not need to check the write length
	 *
	 * Do we have enough credits for this port to make it worthwhile
	 * to bother queueing a write. If it's too small, say a few bytes,
	 * it's better to wait for more credits so we can do a larger write.
	 */
	if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
		dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
			__func__, edge_port->port->number, fifo->count,
			edge_port->txCredits);
		goto exit_send;
	}

	/* lock this write */
	edge_port->write_in_progress = true;

	/* get a pointer to the write_urb */
	urb = edge_port->write_urb;

	/* make sure transfer buffer is freed */
	kfree(urb->transfer_buffer);
	urb->transfer_buffer = NULL;

	/* build the data header for the buffer and port that we are about
	   to send out */
	count = fifo->count;
	buffer = kmalloc(count+2, GFP_ATOMIC);
	if (buffer == NULL) {
		dev_err_console(edge_port->port,
				"%s - no more kernel memory...\n", __func__);
		edge_port->write_in_progress = false;
		goto exit_send;
	}
	buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
				- edge_port->port->serial->minor, count);
	buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
				- edge_port->port->serial->minor, count);

	/* now copy our data */
	bytesleft =  fifo->size - fifo->tail;
	firsthalf = min(bytesleft, count);
	memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
	fifo->tail  += firsthalf;
	fifo->count -= firsthalf;
	if (fifo->tail == fifo->size)
		fifo->tail = 0;

	secondhalf = count-firsthalf;
	if (secondhalf) {
		memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
								secondhalf);
		fifo->tail  += secondhalf;
		fifo->count -= secondhalf;
	}

	if (count)
		usb_serial_debug_data(debug, &edge_port->port->dev,
						__func__, count, &buffer[2]);

	/* fill up the urb with all of our data and submit it */
	usb_fill_bulk_urb(urb, edge_serial->serial->dev,
			usb_sndbulkpipe(edge_serial->serial->dev,
					edge_serial->bulk_out_endpoint),
			buffer, count+2,
			edge_bulk_out_data_callback, edge_port);

	/* decrement the number of credits we have by the number we just sent */
	edge_port->txCredits -= count;
	edge_port->icount.tx += count;

	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status) {
		/* something went wrong */
		dev_err_console(edge_port->port,
			"%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
				__func__, status);
		edge_port->write_in_progress = false;

		/* revert the credits as something bad happened. */
		edge_port->txCredits += count;
		edge_port->icount.tx -= count;
	}
	dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
			__func__, count, edge_port->txCredits, fifo->count);

exit_send:
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
}


/*****************************************************************************
 * edge_write_room
 *	this function is called by the tty driver when it wants to know how
 *	many bytes of data we can accept for a specific port. If successful,
 *	we return the amount of room that we have for this port	(the txCredits)
 *	otherwise we return a negative error number.
 *****************************************************************************/
static int edge_write_room(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int room;
	unsigned long flags;

	dbg("%s", __func__);

	if (edge_port == NULL)
		return 0;
	if (edge_port->closePending)
		return 0;

	dbg("%s - port %d", __func__, port->number);

	if (!edge_port->open) {
		dbg("%s - port not opened", __func__);
		return 0;
	}

	/* total of both buffers is still txCredit */
	spin_lock_irqsave(&edge_port->ep_lock, flags);
	room = edge_port->txCredits - edge_port->txfifo.count;
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

	dbg("%s - returns %d", __func__, room);
	return room;
}


/*****************************************************************************
 * edge_chars_in_buffer
 *	this function is called by the tty driver when it wants to know how
 *	many bytes of data we currently have outstanding in the port (data that
 *	has been written, but hasn't made it out the port yet)
 *	If successful, we return the number of bytes left to be written in the
 *	system,
 *	Otherwise we return a negative error number.
 *****************************************************************************/
static int edge_chars_in_buffer(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int num_chars;
	unsigned long flags;

	dbg("%s", __func__);

	if (edge_port == NULL)
		return 0;
	if (edge_port->closePending)
		return 0;

	if (!edge_port->open) {
		dbg("%s - port not opened", __func__);
		return 0;
	}

	spin_lock_irqsave(&edge_port->ep_lock, flags);
	num_chars = edge_port->maxTxCredits - edge_port->txCredits +
						edge_port->txfifo.count;
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
	if (num_chars) {
		dbg("%s(port %d) - returns %d", __func__,
						port->number, num_chars);
	}

	return num_chars;
}


/*****************************************************************************
 * SerialThrottle
 *	this function is called by the tty driver when it wants to stop the data
 *	being read from the port.
 *****************************************************************************/
static void edge_throttle(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int status;

	dbg("%s - port %d", __func__, port->number);

	if (edge_port == NULL)
		return;

	if (!edge_port->open) {
		dbg("%s - port not opened", __func__);
		return;
	}

	/* if we are implementing XON/XOFF, send the stop character */
	if (I_IXOFF(tty)) {
		unsigned char stop_char = STOP_CHAR(tty);
		status = edge_write(tty, port, &stop_char, 1);
		if (status <= 0)
			return;
	}

	/* if we are implementing RTS/CTS, toggle that line */
	if (tty->termios->c_cflag & CRTSCTS) {
		edge_port->shadowMCR &= ~MCR_RTS;
		status = send_cmd_write_uart_register(edge_port, MCR,
							edge_port->shadowMCR);
		if (status != 0)
			return;
	}
}


/*****************************************************************************
 * edge_unthrottle
 *	this function is called by the tty driver when it wants to resume the
 *	data being read from the port (called after SerialThrottle is called)
 *****************************************************************************/
static void edge_unthrottle(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int status;

	dbg("%s - port %d", __func__, port->number);

	if (edge_port == NULL)
		return;

	if (!edge_port->open) {
		dbg("%s - port not opened", __func__);
		return;
	}

	/* if we are implementing XON/XOFF, send the start character */
	if (I_IXOFF(tty)) {
		unsigned char start_char = START_CHAR(tty);
		status = edge_write(tty, port, &start_char, 1);
		if (status <= 0)
			return;
	}
	/* if we are implementing RTS/CTS, toggle that line */
	if (tty->termios->c_cflag & CRTSCTS) {
		edge_port->shadowMCR |= MCR_RTS;
		send_cmd_write_uart_register(edge_port, MCR,
						edge_port->shadowMCR);
	}
}


/*****************************************************************************
 * SerialSetTermios
 *	this function is called by the tty driver when it wants to change
 * the termios structure
 *****************************************************************************/
static void edge_set_termios(struct tty_struct *tty,
	struct usb_serial_port *port, struct ktermios *old_termios)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	unsigned int cflag;

	cflag = tty->termios->c_cflag;
	dbg("%s - clfag %08x iflag %08x", __func__,
	    tty->termios->c_cflag, tty->termios->c_iflag);
	dbg("%s - old clfag %08x old iflag %08x", __func__,
	    old_termios->c_cflag, old_termios->c_iflag);

	dbg("%s - port %d", __func__, port->number);

	if (edge_port == NULL)
		return;

	if (!edge_port->open) {
		dbg("%s - port not opened", __func__);
		return;
	}

	/* change the port settings to the new ones specified */
	change_port_settings(tty, edge_port, old_termios);
}


/*****************************************************************************
 * get_lsr_info - get line status register info
 *
 * Purpose: Let user call ioctl() to get info when the UART physically
 * 	    is emptied.  On bus types like RS485, the transmitter must
 * 	    release the bus after transmitting. This must be done when
 * 	    the transmit shift register is empty, not be done when the
 * 	    transmit holding register is empty.  This functionality
 * 	    allows an RS485 driver to be written in user space.
 *****************************************************************************/
static int get_lsr_info(struct edgeport_port *edge_port,
						unsigned int __user *value)
{
	unsigned int result = 0;
	unsigned long flags;

	spin_lock_irqsave(&edge_port->ep_lock, flags);
	if (edge_port->maxTxCredits == edge_port->txCredits &&
	    edge_port->txfifo.count == 0) {
		dbg("%s -- Empty", __func__);
		result = TIOCSER_TEMT;
	}
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

	if (copy_to_user(value, &result, sizeof(int)))
		return -EFAULT;
	return 0;
}

static int edge_tiocmset(struct tty_struct *tty,
					unsigned int set, unsigned int clear)
{
	struct usb_serial_port *port = tty->driver_data;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	unsigned int mcr;

	dbg("%s - port %d", __func__, port->number);

	mcr = edge_port->shadowMCR;
	if (set & TIOCM_RTS)
		mcr |= MCR_RTS;
	if (set & TIOCM_DTR)
		mcr |= MCR_DTR;
	if (set & TIOCM_LOOP)
		mcr |= MCR_LOOPBACK;

	if (clear & TIOCM_RTS)
		mcr &= ~MCR_RTS;
	if (clear & TIOCM_DTR)
		mcr &= ~MCR_DTR;
	if (clear & TIOCM_LOOP)
		mcr &= ~MCR_LOOPBACK;

	edge_port->shadowMCR = mcr;

	send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);

	return 0;
}

static int edge_tiocmget(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	unsigned int result = 0;
	unsigned int msr;
	unsigned int mcr;

	dbg("%s - port %d", __func__, port->number);

	msr = edge_port->shadowMSR;
	mcr = edge_port->shadowMCR;
	result = ((mcr & MCR_DTR)	? TIOCM_DTR: 0)	  /* 0x002 */
		  | ((mcr & MCR_RTS)	? TIOCM_RTS: 0)   /* 0x004 */
		  | ((msr & EDGEPORT_MSR_CTS)	? TIOCM_CTS: 0)   /* 0x020 */
		  | ((msr & EDGEPORT_MSR_CD)	? TIOCM_CAR: 0)   /* 0x040 */
		  | ((msr & EDGEPORT_MSR_RI)	? TIOCM_RI:  0)   /* 0x080 */
		  | ((msr & EDGEPORT_MSR_DSR)	? TIOCM_DSR: 0);  /* 0x100 */


	dbg("%s -- %x", __func__, result);

	return result;
}

static int edge_get_icount(struct tty_struct *tty,
				struct serial_icounter_struct *icount)
{
	struct usb_serial_port *port = tty->driver_data;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct async_icount cnow;
	cnow = edge_port->icount;

	icount->cts = cnow.cts;
	icount->dsr = cnow.dsr;
	icount->rng = cnow.rng;
	icount->dcd = cnow.dcd;
	icount->rx = cnow.rx;
	icount->tx = cnow.tx;
	icount->frame = cnow.frame;
	icount->overrun = cnow.overrun;
	icount->parity = cnow.parity;
	icount->brk = cnow.brk;
	icount->buf_overrun = cnow.buf_overrun;

	dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
			__func__,  port->number, icount->rx, icount->tx);
	return 0;
}

static int get_serial_info(struct edgeport_port *edge_port,
				struct serial_struct __user *retinfo)
{
	struct serial_struct tmp;

	if (!retinfo)
		return -EFAULT;

	memset(&tmp, 0, sizeof(tmp));

	tmp.type		= PORT_16550A;
	tmp.line		= edge_port->port->serial->minor;
	tmp.port		= edge_port->port->number;
	tmp.irq			= 0;
	tmp.flags		= ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
	tmp.xmit_fifo_size	= edge_port->maxTxCredits;
	tmp.baud_base		= 9600;
	tmp.close_delay		= 5*HZ;
	tmp.closing_wait	= 30*HZ;

	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
		return -EFAULT;
	return 0;
}


/*****************************************************************************
 * SerialIoctl
 *	this function handles any ioctl calls to the driver
 *****************************************************************************/
static int edge_ioctl(struct tty_struct *tty,
					unsigned int cmd, unsigned long arg)
{
	struct usb_serial_port *port = tty->driver_data;
	DEFINE_WAIT(wait);
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct async_icount cnow;
	struct async_icount cprev;

	dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);

	switch (cmd) {
	case TIOCSERGETLSR:
		dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
		return get_lsr_info(edge_port, (unsigned int __user *) arg);

	case TIOCGSERIAL:
		dbg("%s (%d) TIOCGSERIAL", __func__,  port->number);
		return get_serial_info(edge_port, (struct serial_struct __user *) arg);

	case TIOCMIWAIT:
		dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
		cprev = edge_port->icount;
		while (1) {
			prepare_to_wait(&edge_port->delta_msr_wait,
						&wait, TASK_INTERRUPTIBLE);
			schedule();
			finish_wait(&edge_port->delta_msr_wait, &wait);
			/* see if a signal did it */
			if (signal_pending(current))
				return -ERESTARTSYS;
			cnow = edge_port->icount;
			if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
			    cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
				return -EIO; /* no change => error */
			if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
			    ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
			    ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
			    ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
				return 0;
			}
			cprev = cnow;
		}
		/* NOTREACHED */
		break;

	}
	return -ENOIOCTLCMD;
}


/*****************************************************************************
 * SerialBreak
 *	this function sends a break to the port
 *****************************************************************************/
static void edge_break(struct tty_struct *tty, int break_state)
{
	struct usb_serial_port *port = tty->driver_data;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
	int status;

	if ((!edge_serial->is_epic) ||
	    ((edge_serial->is_epic) &&
	     (edge_serial->epic_descriptor.Supports.IOSPChase))) {
		/* flush and chase */
		edge_port->chaseResponsePending = true;

		dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
		if (status == 0) {
			/* block until chase finished */
			block_until_chase_response(edge_port);
		} else {
			edge_port->chaseResponsePending = false;
		}
	}

	if ((!edge_serial->is_epic) ||
	    ((edge_serial->is_epic) &&
	     (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
		if (break_state == -1) {
			dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
			status = send_iosp_ext_cmd(edge_port,
						IOSP_CMD_SET_BREAK, 0);
		} else {
			dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
			status = send_iosp_ext_cmd(edge_port,
						IOSP_CMD_CLEAR_BREAK, 0);
		}
		if (status)
			dbg("%s - error sending break set/clear command.",
				__func__);
	}
}


/*****************************************************************************
 * process_rcvd_data
 *	this function handles the data received on the bulk in pipe.
 *****************************************************************************/
static void process_rcvd_data(struct edgeport_serial *edge_serial,
				unsigned char *buffer, __u16 bufferLength)
{
	struct usb_serial_port *port;
	struct edgeport_port *edge_port;
	struct tty_struct *tty;
	__u16 lastBufferLength;
	__u16 rxLen;

	dbg("%s", __func__);

	lastBufferLength = bufferLength + 1;

	while (bufferLength > 0) {
		/* failsafe incase we get a message that we don't understand */
		if (lastBufferLength == bufferLength) {
			dbg("%s - stuck in loop, exiting it.", __func__);
			break;
		}
		lastBufferLength = bufferLength;

		switch (edge_serial->rxState) {
		case EXPECT_HDR1:
			edge_serial->rxHeader1 = *buffer;
			++buffer;
			--bufferLength;

			if (bufferLength == 0) {
				edge_serial->rxState = EXPECT_HDR2;
				break;
			}
			/* otherwise, drop on through */
		case EXPECT_HDR2:
			edge_serial->rxHeader2 = *buffer;
			++buffer;
			--bufferLength;

			dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
			    edge_serial->rxHeader1, edge_serial->rxHeader2);
			/* Process depending on whether this header is
			 * data or status */

			if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
				/* Decode this status header and go to
				 * EXPECT_HDR1 (if we can process the status
				 * with only 2 bytes), or go to EXPECT_HDR3 to
				 * get the third byte. */
				edge_serial->rxPort =
				    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
				edge_serial->rxStatusCode =
				    IOSP_GET_STATUS_CODE(
						edge_serial->rxHeader1);

				if (!IOSP_STATUS_IS_2BYTE(
						edge_serial->rxStatusCode)) {
					/* This status needs additional bytes.
					 * Save what we have and then wait for
					 * more data.
					 */
					edge_serial->rxStatusParam
						= edge_serial->rxHeader2;
					edge_serial->rxState = EXPECT_HDR3;
					break;
				}
				/* We have all the header bytes, process the
				   status now */
				process_rcvd_status(edge_serial,
						edge_serial->rxHeader2, 0);
				edge_serial->rxState = EXPECT_HDR1;
				break;
			} else {
				edge_serial->rxPort =
				    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
				edge_serial->rxBytesRemaining =
				    IOSP_GET_HDR_DATA_LEN(
						edge_serial->rxHeader1,
						edge_serial->rxHeader2);
				dbg("%s - Data for Port %u Len %u",
						__func__,
						edge_serial->rxPort,
						edge_serial->rxBytesRemaining);

				/* ASSERT(DevExt->RxPort < DevExt->NumPorts);
				 * ASSERT(DevExt->RxBytesRemaining <
				 *		IOSP_MAX_DATA_LENGTH);
				 */

				if (bufferLength == 0) {
					edge_serial->rxState = EXPECT_DATA;
					break;
				}
				/* Else, drop through */
			}
		case EXPECT_DATA: /* Expect data */
			if (bufferLength < edge_serial->rxBytesRemaining) {
				rxLen = bufferLength;
				/* Expect data to start next buffer */
				edge_serial->rxState = EXPECT_DATA;
			} else {
				/* BufLen >= RxBytesRemaining */
				rxLen = edge_serial->rxBytesRemaining;
				/* Start another header next time */
				edge_serial->rxState = EXPECT_HDR1;
			}

			bufferLength -= rxLen;
			edge_serial->rxBytesRemaining -= rxLen;

			/* spit this data back into the tty driver if this
			   port is open */
			if (rxLen) {
				port = edge_serial->serial->port[
							edge_serial->rxPort];
				edge_port = usb_get_serial_port_data(port);
				if (edge_port->open) {
					tty = tty_port_tty_get(
						&edge_port->port->port);
					if (tty) {
						dbg("%s - Sending %d bytes to TTY for port %d",
							__func__, rxLen, edge_serial->rxPort);
						edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
						tty_kref_put(tty);
					}
					edge_port->icount.rx += rxLen;
				}
				buffer += rxLen;
			}
			break;

		case EXPECT_HDR3:	/* Expect 3rd byte of status header */
			edge_serial->rxHeader3 = *buffer;
			++buffer;
			--bufferLength;

			/* We have all the header bytes, process the
			   status now */
			process_rcvd_status(edge_serial,
				edge_serial->rxStatusParam,
				edge_serial->rxHeader3);
			edge_serial->rxState = EXPECT_HDR1;
			break;
		}
	}
}


/*****************************************************************************
 * process_rcvd_status
 *	this function handles the any status messages received on the
 *	bulk in pipe.
 *****************************************************************************/
static void process_rcvd_status(struct edgeport_serial *edge_serial,
						__u8 byte2, __u8 byte3)
{
	struct usb_serial_port *port;
	struct edgeport_port *edge_port;
	struct tty_struct *tty;
	__u8 code = edge_serial->rxStatusCode;

	/* switch the port pointer to the one being currently talked about */
	port = edge_serial->serial->port[edge_serial->rxPort];
	edge_port = usb_get_serial_port_data(port);
	if (edge_port == NULL) {
		dev_err(&edge_serial->serial->dev->dev,
			"%s - edge_port == NULL for port %d\n",
					__func__, edge_serial->rxPort);
		return;
	}

	dbg("%s - port %d", __func__, edge_serial->rxPort);

	if (code == IOSP_EXT_STATUS) {
		switch (byte2) {
		case IOSP_EXT_STATUS_CHASE_RSP:
			/* we want to do EXT status regardless of port
			 * open/closed */
			dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
					__func__, edge_serial->rxPort, byte3);
			/* Currently, the only EXT_STATUS is Chase, so process
			 * here instead of one more call to one more subroutine
			 * If/when more EXT_STATUS, there'll be more work to do
			 * Also, we currently clear flag and close the port
			 * regardless of content of above's Byte3.
			 * We could choose to do something else when Byte3 says
			 * Timeout on Chase from Edgeport, like wait longer in
			 * block_until_chase_response, but for now we don't.
			 */
			edge_port->chaseResponsePending = false;
			wake_up(&edge_port->wait_chase);
			return;

		case IOSP_EXT_STATUS_RX_CHECK_RSP:
			dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============", __func__, edge_serial->rxPort, byte3);
			/* Port->RxCheckRsp = true; */
			return;
		}
	}

	if (code == IOSP_STATUS_OPEN_RSP) {
		edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
		edge_port->maxTxCredits = edge_port->txCredits;
		dbg("%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
		handle_new_msr(edge_port, byte2);

		/* send the current line settings to the port so we are
		   in sync with any further termios calls */
		tty = tty_port_tty_get(&edge_port->port->port);
		if (tty) {
			change_port_settings(tty,
				edge_port, tty->termios);
			tty_kref_put(tty);
		}

		/* we have completed the open */
		edge_port->openPending = false;
		edge_port->open = true;
		wake_up(&edge_port->wait_open);
		return;
	}

	/* If port is closed, silently discard all rcvd status. We can
	 * have cases where buffered status is received AFTER the close
	 * port command is sent to the Edgeport.
	 */
	if (!edge_port->open || edge_port->closePending)
		return;

	switch (code) {
	/* Not currently sent by Edgeport */
	case IOSP_STATUS_LSR:
		dbg("%s - Port %u LSR Status = %02x",
					__func__, edge_serial->rxPort, byte2);
		handle_new_lsr(edge_port, false, byte2, 0);
		break;

	case IOSP_STATUS_LSR_DATA:
		dbg("%s - Port %u LSR Status = %02x, Data = %02x",
				__func__, edge_serial->rxPort, byte2, byte3);
		/* byte2 is LSR Register */
		/* byte3 is broken data byte */
		handle_new_lsr(edge_port, true, byte2, byte3);
		break;
	/*
	 *	case IOSP_EXT_4_STATUS:
	 *		dbg("%s - Port %u LSR Status = %02x Data = %02x",
	 *			__func__, edge_serial->rxPort, byte2, byte3);
	 *		break;
	 */
	case IOSP_STATUS_MSR:
		dbg("%s - Port %u MSR Status = %02x",
					__func__, edge_serial->rxPort, byte2);
		/*
		 * Process this new modem status and generate appropriate
		 * events, etc, based on the new status. This routine
		 * also saves the MSR in Port->ShadowMsr.
		 */
		handle_new_msr(edge_port, byte2);
		break;

	default:
		dbg("%s - Unrecognized IOSP status code %u", __func__, code);
		break;
	}
}


/*****************************************************************************
 * edge_tty_recv
 *	this function passes data on to the tty flip buffer
 *****************************************************************************/
static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
					unsigned char *data, int length)
{
	int cnt;

	cnt = tty_insert_flip_string(tty, data, length);
	if (cnt < length) {
		dev_err(dev, "%s - dropping data, %d bytes lost\n",
				__func__, length - cnt);
	}
	data += cnt;
	length -= cnt;

	tty_flip_buffer_push(tty);
}


/*****************************************************************************
 * handle_new_msr
 *	this function handles any change to the msr register for a port.
 *****************************************************************************/
static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
{
	struct  async_icount *icount;

	dbg("%s %02x", __func__, newMsr);

	if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
			EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
		icount = &edge_port->icount;

		/* update input line counters */
		if (newMsr & EDGEPORT_MSR_DELTA_CTS)
			icount->cts++;
		if (newMsr & EDGEPORT_MSR_DELTA_DSR)
			icount->dsr++;
		if (newMsr & EDGEPORT_MSR_DELTA_CD)
			icount->dcd++;
		if (newMsr & EDGEPORT_MSR_DELTA_RI)
			icount->rng++;
		wake_up_interruptible(&edge_port->delta_msr_wait);
	}

	/* Save the new modem status */
	edge_port->shadowMSR = newMsr & 0xf0;
}


/*****************************************************************************
 * handle_new_lsr
 *	this function handles any change to the lsr register for a port.
 *****************************************************************************/
static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
							__u8 lsr, __u8 data)
{
	__u8 newLsr = (__u8) (lsr & (__u8)
		(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
	struct async_icount *icount;

	dbg("%s - %02x", __func__, newLsr);

	edge_port->shadowLSR = lsr;

	if (newLsr & LSR_BREAK) {
		/*
		 * Parity and Framing errors only count if they
		 * occur exclusive of a break being
		 * received.
		 */
		newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
	}

	/* Place LSR data byte into Rx buffer */
	if (lsrData) {
		struct tty_struct *tty =
				tty_port_tty_get(&edge_port->port->port);
		if (tty) {
			edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
			tty_kref_put(tty);
		}
	}
	/* update input line counters */
	icount = &edge_port->icount;
	if (newLsr & LSR_BREAK)
		icount->brk++;
	if (newLsr & LSR_OVER_ERR)
		icount->overrun++;
	if (newLsr & LSR_PAR_ERR)
		icount->parity++;
	if (newLsr & LSR_FRM_ERR)
		icount->frame++;
}


/****************************************************************************
 * sram_write
 *	writes a number of bytes to the Edgeport device's sram starting at the
 *	given address.
 *	If successful returns the number of bytes written, otherwise it returns
 *	a negative error number of the problem.
 ****************************************************************************/
static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
					__u16 length, const __u8 *data)
{
	int result;
	__u16 current_length;
	unsigned char *transfer_buffer;

	dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);

	transfer_buffer =  kmalloc(64, GFP_KERNEL);
	if (!transfer_buffer) {
		dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
							__func__, 64);
		return -ENOMEM;
	}

	/* need to split these writes up into 64 byte chunks */
	result = 0;
	while (length > 0) {
		if (length > 64)
			current_length = 64;
		else
			current_length = length;

/*		dbg("%s - writing %x, %x, %d", __func__,
					extAddr, addr, current_length); */
		memcpy(transfer_buffer, data, current_length);
		result = usb_control_msg(serial->dev,
					usb_sndctrlpipe(serial->dev, 0),
					USB_REQUEST_ION_WRITE_RAM,
					0x40, addr, extAddr, transfer_buffer,
					current_length, 300);
		if (result < 0)
			break;
		length -= current_length;
		addr += current_length;
		data += current_length;
	}

	kfree(transfer_buffer);
	return result;
}


/****************************************************************************
 * rom_write
 *	writes a number of bytes to the Edgeport device's ROM starting at the
 *	given address.
 *	If successful returns the number of bytes written, otherwise it returns
 *	a negative error number of the problem.
 ****************************************************************************/
static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
					__u16 length, const __u8 *data)
{
	int result;
	__u16 current_length;
	unsigned char *transfer_buffer;

/*	dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */

	transfer_buffer =  kmalloc(64, GFP_KERNEL);
	if (!transfer_buffer) {
		dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
								__func__, 64);
		return -ENOMEM;
	}

	/* need to split these writes up into 64 byte chunks */
	result = 0;
	while (length > 0) {
		if (length > 64)
			current_length = 64;
		else
			current_length = length;
/*		dbg("%s - writing %x, %x, %d", __func__,
					extAddr, addr, current_length); */
		memcpy(transfer_buffer, data, current_length);
		result = usb_control_msg(serial->dev,
					usb_sndctrlpipe(serial->dev, 0),
					USB_REQUEST_ION_WRITE_ROM, 0x40,
					addr, extAddr,
					transfer_buffer, current_length, 300);
		if (result < 0)
			break;
		length -= current_length;
		addr += current_length;
		data += current_length;
	}

	kfree(transfer_buffer);
	return result;
}


/****************************************************************************
 * rom_read
 *	reads a number of bytes from the Edgeport device starting at the given
 *	address.
 *	If successful returns the number of bytes read, otherwise it returns
 *	a negative error number of the problem.
 ****************************************************************************/
static int rom_read(struct usb_serial *serial, __u16 extAddr,
					__u16 addr, __u16 length, __u8 *data)
{
	int result;
	__u16 current_length;
	unsigned char *transfer_buffer;

	dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);

	transfer_buffer =  kmalloc(64, GFP_KERNEL);
	if (!transfer_buffer) {
		dev_err(&serial->dev->dev,
			"%s - kmalloc(%d) failed.\n", __func__, 64);
		return -ENOMEM;
	}

	/* need to split these reads up into 64 byte chunks */
	result = 0;
	while (length > 0) {
		if (length > 64)
			current_length = 64;
		else
			current_length = length;
/*		dbg("%s - %x, %x, %d", __func__,
				extAddr, addr, current_length); */
		result = usb_control_msg(serial->dev,
					usb_rcvctrlpipe(serial->dev, 0),
					USB_REQUEST_ION_READ_ROM,
					0xC0, addr, extAddr, transfer_buffer,
					current_length, 300);
		if (result < 0)
			break;
		memcpy(data, transfer_buffer, current_length);
		length -= current_length;
		addr += current_length;
		data += current_length;
	}

	kfree(transfer_buffer);
	return result;
}


/****************************************************************************
 * send_iosp_ext_cmd
 *	Is used to send a IOSP message to the Edgeport device
 ****************************************************************************/
static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
						__u8 command, __u8 param)
{
	unsigned char   *buffer;
	unsigned char   *currentCommand;
	int             length = 0;
	int             status = 0;

	dbg("%s - %d, %d", __func__, command, param);

	buffer = kmalloc(10, GFP_ATOMIC);
	if (!buffer) {
		dev_err(&edge_port->port->dev,
				"%s - kmalloc(%d) failed.\n", __func__, 10);
		return -ENOMEM;
	}

	currentCommand = buffer;

	MAKE_CMD_EXT_CMD(&currentCommand, &length,
		edge_port->port->number - edge_port->port->serial->minor,
		command, param);

	status = write_cmd_usb(edge_port, buffer, length);
	if (status) {
		/* something bad happened, let's free up the memory */
		kfree(buffer);
	}

	return status;
}


/*****************************************************************************
 * write_cmd_usb
 *	this function writes the given buffer out to the bulk write endpoint.
 *****************************************************************************/
static int write_cmd_usb(struct edgeport_port *edge_port,
					unsigned char *buffer, int length)
{
	struct edgeport_serial *edge_serial =
				usb_get_serial_data(edge_port->port->serial);
	int status = 0;
	struct urb *urb;

	usb_serial_debug_data(debug, &edge_port->port->dev,
						__func__, length, buffer);

	/* Allocate our next urb */
	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!urb)
		return -ENOMEM;

	atomic_inc(&CmdUrbs);
	dbg("%s - ALLOCATE URB %p (outstanding %d)",
				__func__, urb, atomic_read(&CmdUrbs));

	usb_fill_bulk_urb(urb, edge_serial->serial->dev,
			usb_sndbulkpipe(edge_serial->serial->dev,
					edge_serial->bulk_out_endpoint),
			buffer, length, edge_bulk_out_cmd_callback, edge_port);

	edge_port->commandPending = true;
	status = usb_submit_urb(urb, GFP_ATOMIC);

	if (status) {
		/* something went wrong */
		dev_err(&edge_port->port->dev,
		    "%s - usb_submit_urb(write command) failed, status = %d\n",
							__func__, status);
		usb_kill_urb(urb);
		usb_free_urb(urb);
		atomic_dec(&CmdUrbs);
		return status;
	}

#if 0
	wait_event(&edge_port->wait_command, !edge_port->commandPending);

	if (edge_port->commandPending) {
		/* command timed out */
		dbg("%s - command timed out", __func__);
		status = -EINVAL;
	}
#endif
	return status;
}


/*****************************************************************************
 * send_cmd_write_baud_rate
 *	this function sends the proper command to change the baud rate of the
 *	specified port.
 *****************************************************************************/
static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
								int baudRate)
{
	struct edgeport_serial *edge_serial =
				usb_get_serial_data(edge_port->port->serial);
	unsigned char *cmdBuffer;
	unsigned char *currCmd;
	int cmdLen = 0;
	int divisor;
	int status;
	unsigned char number =
		edge_port->port->number - edge_port->port->serial->minor;

	if (edge_serial->is_epic &&
	    !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
		dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
		    edge_port->port->number, baudRate);
		return 0;
	}

	dbg("%s - port = %d, baud = %d", __func__,
					edge_port->port->number, baudRate);

	status = calc_baud_rate_divisor(baudRate, &divisor);
	if (status) {
		dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
								__func__);
		return status;
	}

	/* Alloc memory for the string of commands. */
	cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
	if (!cmdBuffer) {
		dev_err(&edge_port->port->dev,
			"%s - kmalloc(%d) failed.\n", __func__, 0x100);
		return -ENOMEM;
	}
	currCmd = cmdBuffer;

	/* Enable access to divisor latch */
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);

	/* Write the divisor itself */
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));

	/* Restore original value to disable access to divisor latch */
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
						edge_port->shadowLCR);

	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
	if (status) {
		/* something bad happened, let's free up the memory */
		kfree(cmdBuffer);
	}

	return status;
}


/*****************************************************************************
 * calc_baud_rate_divisor
 *	this function calculates the proper baud rate divisor for the specified
 *	baud rate.
 *****************************************************************************/
static int calc_baud_rate_divisor(int baudrate, int *divisor)
{
	int i;
	__u16 custom;


	dbg("%s - %d", __func__, baudrate);

	for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
		if (divisor_table[i].BaudRate == baudrate) {
			*divisor = divisor_table[i].Divisor;
			return 0;
		}
	}

	/* We have tried all of the standard baud rates
	 * lets try to calculate the divisor for this baud rate
	 * Make sure the baud rate is reasonable */
	if (baudrate > 50 && baudrate < 230400) {
		/* get divisor */
		custom = (__u16)((230400L + baudrate/2) / baudrate);

		*divisor = custom;

		dbg("%s - Baud %d = %d", __func__, baudrate, custom);
		return 0;
	}

	return -1;
}


/*****************************************************************************
 * send_cmd_write_uart_register
 *  this function builds up a uart register message and sends to the device.
 *****************************************************************************/
static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
						__u8 regNum, __u8 regValue)
{
	struct edgeport_serial *edge_serial =
				usb_get_serial_data(edge_port->port->serial);
	unsigned char *cmdBuffer;
	unsigned char *currCmd;
	unsigned long cmdLen = 0;
	int status;

	dbg("%s - write to %s register 0x%02x",
			(regNum == MCR) ? "MCR" : "LCR", __func__, regValue);

	if (edge_serial->is_epic &&
	    !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
	    regNum == MCR) {
		dbg("SendCmdWriteUartReg - Not writing to MCR Register");
		return 0;
	}

	if (edge_serial->is_epic &&
	    !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
	    regNum == LCR) {
		dbg("SendCmdWriteUartReg - Not writing to LCR Register");
		return 0;
	}

	/* Alloc memory for the string of commands. */
	cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
	if (cmdBuffer == NULL)
		return -ENOMEM;

	currCmd = cmdBuffer;

	/* Build a cmd in the buffer to write the given register */
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
		edge_port->port->number - edge_port->port->serial->minor,
		regNum, regValue);

	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
	if (status) {
		/* something bad happened, let's free up the memory */
		kfree(cmdBuffer);
	}

	return status;
}


/*****************************************************************************
 * change_port_settings
 *	This routine is called to set the UART on the device to match the
 *	specified new settings.
 *****************************************************************************/

static void change_port_settings(struct tty_struct *tty,
	struct edgeport_port *edge_port, struct ktermios *old_termios)
{
	struct edgeport_serial *edge_serial =
			usb_get_serial_data(edge_port->port->serial);
	int baud;
	unsigned cflag;
	__u8 mask = 0xff;
	__u8 lData;
	__u8 lParity;
	__u8 lStop;
	__u8 rxFlow;
	__u8 txFlow;
	int status;

	dbg("%s - port %d", __func__, edge_port->port->number);

	if (!edge_port->open &&
	    !edge_port->openPending) {
		dbg("%s - port not opened", __func__);
		return;
	}

	cflag = tty->termios->c_cflag;

	switch (cflag & CSIZE) {
	case CS5:
		lData = LCR_BITS_5; mask = 0x1f;
		dbg("%s - data bits = 5", __func__);
		break;
	case CS6:
		lData = LCR_BITS_6; mask = 0x3f;
		dbg("%s - data bits = 6", __func__);
		break;
	case CS7:
		lData = LCR_BITS_7; mask = 0x7f;
		dbg("%s - data bits = 7", __func__);
		break;
	default:
	case CS8:
		lData = LCR_BITS_8;
		dbg("%s - data bits = 8", __func__);
		break;
	}

	lParity = LCR_PAR_NONE;
	if (cflag & PARENB) {
		if (cflag & CMSPAR) {
			if (cflag & PARODD) {
				lParity = LCR_PAR_MARK;
				dbg("%s - parity = mark", __func__);
			} else {
				lParity = LCR_PAR_SPACE;
				dbg("%s - parity = space", __func__);
			}
		} else if (cflag & PARODD) {
			lParity = LCR_PAR_ODD;
			dbg("%s - parity = odd", __func__);
		} else {
			lParity = LCR_PAR_EVEN;
			dbg("%s - parity = even", __func__);
		}
	} else {
		dbg("%s - parity = none", __func__);
	}

	if (cflag & CSTOPB) {
		lStop = LCR_STOP_2;
		dbg("%s - stop bits = 2", __func__);
	} else {
		lStop = LCR_STOP_1;
		dbg("%s - stop bits = 1", __func__);
	}

	/* figure out the flow control settings */
	rxFlow = txFlow = 0x00;
	if (cflag & CRTSCTS) {
		rxFlow |= IOSP_RX_FLOW_RTS;
		txFlow |= IOSP_TX_FLOW_CTS;
		dbg("%s - RTS/CTS is enabled", __func__);
	} else {
		dbg("%s - RTS/CTS is disabled", __func__);
	}

	/* if we are implementing XON/XOFF, set the start and stop character
	   in the device */
	if (I_IXOFF(tty) || I_IXON(tty)) {
		unsigned char stop_char  = STOP_CHAR(tty);
		unsigned char start_char = START_CHAR(tty);

		if ((!edge_serial->is_epic) ||
		    ((edge_serial->is_epic) &&
		     (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
			send_iosp_ext_cmd(edge_port,
					IOSP_CMD_SET_XON_CHAR, start_char);
			send_iosp_ext_cmd(edge_port,
					IOSP_CMD_SET_XOFF_CHAR, stop_char);
		}

		/* if we are implementing INBOUND XON/XOFF */
		if (I_IXOFF(tty)) {
			rxFlow |= IOSP_RX_FLOW_XON_XOFF;
			dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
					__func__, start_char, stop_char);
		} else {
			dbg("%s - INBOUND XON/XOFF is disabled", __func__);
		}

		/* if we are implementing OUTBOUND XON/XOFF */
		if (I_IXON(tty)) {
			txFlow |= IOSP_TX_FLOW_XON_XOFF;
			dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
					__func__, start_char, stop_char);
		} else {
			dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
		}
	}

	/* Set flow control to the configured value */
	if ((!edge_serial->is_epic) ||
	    ((edge_serial->is_epic) &&
	     (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
	if ((!edge_serial->is_epic) ||
	    ((edge_serial->is_epic) &&
	     (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);


	edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
	edge_port->shadowLCR |= (lData | lParity | lStop);

	edge_port->validDataMask = mask;

	/* Send the updated LCR value to the EdgePort */
	status = send_cmd_write_uart_register(edge_port, LCR,
							edge_port->shadowLCR);
	if (status != 0)
		return;

	/* set up the MCR register and send it to the EdgePort */
	edge_port->shadowMCR = MCR_MASTER_IE;
	if (cflag & CBAUD)
		edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);

	status = send_cmd_write_uart_register(edge_port, MCR,
						edge_port->shadowMCR);
	if (status != 0)
		return;

	/* Determine divisor based on baud rate */
	baud = tty_get_baud_rate(tty);
	if (!baud) {
		/* pick a default, any default... */
		baud = 9600;
	}

	dbg("%s - baud rate = %d", __func__, baud);
	status = send_cmd_write_baud_rate(edge_port, baud);
	if (status == -1) {
		/* Speed change was not possible - put back the old speed */
		baud = tty_termios_baud_rate(old_termios);
		tty_encode_baud_rate(tty, baud, baud);
	}
}


/****************************************************************************
 * unicode_to_ascii
 *	Turns a string from Unicode into ASCII.
 *	Doesn't do a good job with any characters that are outside the normal
 *	ASCII range, but it's only for debugging...
 *	NOTE: expects the unicode in LE format
 ****************************************************************************/
static void unicode_to_ascii(char *string, int buflen,
					__le16 *unicode, int unicode_size)
{
	int i;

	if (buflen <= 0)	/* never happens, but... */
		return;
	--buflen;		/* space for nul */

	for (i = 0; i < unicode_size; i++) {
		if (i >= buflen)
			break;
		string[i] = (char)(le16_to_cpu(unicode[i]));
	}
	string[i] = 0x00;
}


/****************************************************************************
 * get_manufacturing_desc
 *	reads in the manufacturing descriptor and stores it into the serial
 *	structure.
 ****************************************************************************/
static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
{
	int response;

	dbg("getting manufacturer descriptor");

	response = rom_read(edge_serial->serial,
				(EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
				(__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
				EDGE_MANUF_DESC_LEN,
				(__u8 *)(&edge_serial->manuf_descriptor));

	if (response < 1)
		dev_err(&edge_serial->serial->dev->dev,
			"error in getting manufacturer descriptor\n");
	else {
		char string[30];
		dbg("**Manufacturer Descriptor");
		dbg("  RomSize:        %dK",
			edge_serial->manuf_descriptor.RomSize);
		dbg("  RamSize:        %dK",
			edge_serial->manuf_descriptor.RamSize);
		dbg("  CpuRev:         %d",
			edge_serial->manuf_descriptor.CpuRev);
		dbg("  BoardRev:       %d",
			edge_serial->manuf_descriptor.BoardRev);
		dbg("  NumPorts:       %d",
			edge_serial->manuf_descriptor.NumPorts);
		dbg("  DescDate:       %d/%d/%d",
			edge_serial->manuf_descriptor.DescDate[0],
			edge_serial->manuf_descriptor.DescDate[1],
			edge_serial->manuf_descriptor.DescDate[2]+1900);
		unicode_to_ascii(string, sizeof(string),
			edge_serial->manuf_descriptor.SerialNumber,
			edge_serial->manuf_descriptor.SerNumLength/2);
		dbg("  SerialNumber: %s", string);
		unicode_to_ascii(string, sizeof(string),
			edge_serial->manuf_descriptor.AssemblyNumber,
			edge_serial->manuf_descriptor.AssemblyNumLength/2);
		dbg("  AssemblyNumber: %s", string);
		unicode_to_ascii(string, sizeof(string),
		    edge_serial->manuf_descriptor.OemAssyNumber,
		    edge_serial->manuf_descriptor.OemAssyNumLength/2);
		dbg("  OemAssyNumber:  %s", string);
		dbg("  UartType:       %d",
			edge_serial->manuf_descriptor.UartType);
		dbg("  IonPid:         %d",
			edge_serial->manuf_descriptor.IonPid);
		dbg("  IonConfig:      %d",
			edge_serial->manuf_descriptor.IonConfig);
	}
}


/****************************************************************************
 * get_boot_desc
 *	reads in the bootloader descriptor and stores it into the serial
 *	structure.
 ****************************************************************************/
static void get_boot_desc(struct edgeport_serial *edge_serial)
{
	int response;

	dbg("getting boot descriptor");

	response = rom_read(edge_serial->serial,
				(EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
				(__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
				EDGE_BOOT_DESC_LEN,
				(__u8 *)(&edge_serial->boot_descriptor));

	if (response < 1)
		dev_err(&edge_serial->serial->dev->dev,
				"error in getting boot descriptor\n");
	else {
		dbg("**Boot Descriptor:");
		dbg("  BootCodeLength: %d",
		    le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
		dbg("  MajorVersion:   %d",
			edge_serial->boot_descriptor.MajorVersion);
		dbg("  MinorVersion:   %d",
			edge_serial->boot_descriptor.MinorVersion);
		dbg("  BuildNumber:    %d",
			le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
		dbg("  Capabilities:   0x%x",
		      le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
		dbg("  UConfig0:       %d",
			edge_serial->boot_descriptor.UConfig0);
		dbg("  UConfig1:       %d",
			edge_serial->boot_descriptor.UConfig1);
	}
}


/****************************************************************************
 * load_application_firmware
 *	This is called to load the application firmware to the device
 ****************************************************************************/
static void load_application_firmware(struct edgeport_serial *edge_serial)
{
	const struct ihex_binrec *rec;
	const struct firmware *fw;
	const char *fw_name;
	const char *fw_info;
	int response;
	__u32 Operaddr;
	__u16 build;

	switch (edge_serial->product_info.iDownloadFile) {
		case EDGE_DOWNLOAD_FILE_I930:
			fw_info = "downloading firmware version (930)";
			fw_name	= "edgeport/down.fw";
			break;

		case EDGE_DOWNLOAD_FILE_80251:
			fw_info = "downloading firmware version (80251)";
			fw_name	= "edgeport/down2.fw";
			break;

		case EDGE_DOWNLOAD_FILE_NONE:
			dbg("No download file specified, skipping download");
			return;

		default:
			return;
	}

	response = request_ihex_firmware(&fw, fw_name,
				    &edge_serial->serial->dev->dev);
	if (response) {
		printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
		       fw_name, response);
		return;
	}

	rec = (const struct ihex_binrec *)fw->data;
	build = (rec->data[2] << 8) | rec->data[3];

	dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);

	edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
	edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
	edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);

	for (rec = ihex_next_binrec(rec); rec;
	     rec = ihex_next_binrec(rec)) {
		Operaddr = be32_to_cpu(rec->addr);
		response = sram_write(edge_serial->serial,
				     Operaddr >> 16,
				     Operaddr & 0xFFFF,
				     be16_to_cpu(rec->len),
				     &rec->data[0]);
		if (response < 0) {
			dev_err(&edge_serial->serial->dev->dev,
				"sram_write failed (%x, %x, %d)\n",
				Operaddr >> 16, Operaddr & 0xFFFF,
				be16_to_cpu(rec->len));
			break;
		}
	}

	dbg("sending exec_dl_code");
	response = usb_control_msg (edge_serial->serial->dev, 
				    usb_sndctrlpipe(edge_serial->serial->dev, 0), 
				    USB_REQUEST_ION_EXEC_DL_CODE, 
				    0x40, 0x4000, 0x0001, NULL, 0, 3000);

	release_firmware(fw);
}


/****************************************************************************
 * edge_startup
 ****************************************************************************/
static int edge_startup(struct usb_serial *serial)
{
	struct edgeport_serial *edge_serial;
	struct edgeport_port *edge_port;
	struct usb_device *dev;
	int i, j;
	int response;
	bool interrupt_in_found;
	bool bulk_in_found;
	bool bulk_out_found;
	static __u32 descriptor[3] = {	EDGE_COMPATIBILITY_MASK0,
					EDGE_COMPATIBILITY_MASK1,
					EDGE_COMPATIBILITY_MASK2 };

	dev = serial->dev;

	/* create our private serial structure */
	edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
	if (edge_serial == NULL) {
		dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
		return -ENOMEM;
	}
	spin_lock_init(&edge_serial->es_lock);
	edge_serial->serial = serial;
	usb_set_serial_data(serial, edge_serial);

	/* get the name for the device from the device */
	i = usb_string(dev, dev->descriptor.iManufacturer,
	    &edge_serial->name[0], MAX_NAME_LEN+1);
	if (i < 0)
		i = 0;
	edge_serial->name[i++] = ' ';
	usb_string(dev, dev->descriptor.iProduct,
	    &edge_serial->name[i], MAX_NAME_LEN+2 - i);

	dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);

	/* Read the epic descriptor */
	if (get_epic_descriptor(edge_serial) <= 0) {
		/* memcpy descriptor to Supports structures */
		memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
		       sizeof(struct edge_compatibility_bits));

		/* get the manufacturing descriptor for this device */
		get_manufacturing_desc(edge_serial);

		/* get the boot descriptor */
		get_boot_desc(edge_serial);

		get_product_info(edge_serial);
	}

	/* set the number of ports from the manufacturing description */
	/* serial->num_ports = serial->product_info.NumPorts; */
	if ((!edge_serial->is_epic) &&
	    (edge_serial->product_info.NumPorts != serial->num_ports)) {
		dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
			 "vs. core thinking we have %d ports, email "
			 "greg@kroah.com this information.\n",
			 edge_serial->product_info.NumPorts,
			 serial->num_ports);
	}

	dbg("%s - time 1 %ld", __func__, jiffies);

	/* If not an EPiC device */
	if (!edge_serial->is_epic) {
		/* now load the application firmware into this device */
		load_application_firmware(edge_serial);

		dbg("%s - time 2 %ld", __func__, jiffies);

		/* Check current Edgeport EEPROM and update if necessary */
		update_edgeport_E2PROM(edge_serial);

		dbg("%s - time 3 %ld", __func__, jiffies);

		/* set the configuration to use #1 */
/*		dbg("set_configuration 1"); */
/*		usb_set_configuration (dev, 1); */
	}
	dbg("  FirmwareMajorVersion  %d.%d.%d",
	    edge_serial->product_info.FirmwareMajorVersion,
	    edge_serial->product_info.FirmwareMinorVersion,
	    le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));

	/* we set up the pointers to the endpoints in the edge_open function,
	 * as the structures aren't created yet. */

	/* set up our port private structures */
	for (i = 0; i < serial->num_ports; ++i) {
		edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
		if (edge_port == NULL) {
			dev_err(&serial->dev->dev, "%s - Out of memory\n",
								   __func__);
			for (j = 0; j < i; ++j) {
				kfree(usb_get_serial_port_data(serial->port[j]));
				usb_set_serial_port_data(serial->port[j],
									NULL);
			}
			usb_set_serial_data(serial, NULL);
			kfree(edge_serial);
			return -ENOMEM;
		}
		spin_lock_init(&edge_port->ep_lock);
		edge_port->port = serial->port[i];
		usb_set_serial_port_data(serial->port[i], edge_port);
	}

	response = 0;

	if (edge_serial->is_epic) {
		/* EPIC thing, set up our interrupt polling now and our read
		 * urb, so that the device knows it really is connected. */
		interrupt_in_found = bulk_in_found = bulk_out_found = false;
		for (i = 0; i < serial->interface->altsetting[0]
						.desc.bNumEndpoints; ++i) {
			struct usb_endpoint_descriptor *endpoint;
			int buffer_size;

			endpoint = &serial->interface->altsetting[0].
							endpoint[i].desc;
			buffer_size = usb_endpoint_maxp(endpoint);
			if (!interrupt_in_found &&
			    (usb_endpoint_is_int_in(endpoint))) {
				/* we found a interrupt in endpoint */
				dbg("found interrupt in");

				/* not set up yet, so do it now */
				edge_serial->interrupt_read_urb =
						usb_alloc_urb(0, GFP_KERNEL);
				if (!edge_serial->interrupt_read_urb) {
					dev_err(&dev->dev, "out of memory\n");
					return -ENOMEM;
				}
				edge_serial->interrupt_in_buffer =
					kmalloc(buffer_size, GFP_KERNEL);
				if (!edge_serial->interrupt_in_buffer) {
					dev_err(&dev->dev, "out of memory\n");
					usb_free_urb(edge_serial->interrupt_read_urb);
					return -ENOMEM;
				}
				edge_serial->interrupt_in_endpoint =
						endpoint->bEndpointAddress;

				/* set up our interrupt urb */
				usb_fill_int_urb(
					edge_serial->interrupt_read_urb,
					dev,
					usb_rcvintpipe(dev,
						endpoint->bEndpointAddress),
					edge_serial->interrupt_in_buffer,
					buffer_size,
					edge_interrupt_callback,
					edge_serial,
					endpoint->bInterval);

				interrupt_in_found = true;
			}

			if (!bulk_in_found &&
				(usb_endpoint_is_bulk_in(endpoint))) {
				/* we found a bulk in endpoint */
				dbg("found bulk in");

				/* not set up yet, so do it now */
				edge_serial->read_urb =
						usb_alloc_urb(0, GFP_KERNEL);
				if (!edge_serial->read_urb) {
					dev_err(&dev->dev, "out of memory\n");
					return -ENOMEM;
				}
				edge_serial->bulk_in_buffer =
					kmalloc(buffer_size, GFP_KERNEL);
				if (!edge_serial->bulk_in_buffer) {
					dev_err(&dev->dev, "out of memory\n");
					usb_free_urb(edge_serial->read_urb);
					return -ENOMEM;
				}
				edge_serial->bulk_in_endpoint =
						endpoint->bEndpointAddress;

				/* set up our bulk in urb */
				usb_fill_bulk_urb(edge_serial->read_urb, dev,
					usb_rcvbulkpipe(dev,
						endpoint->bEndpointAddress),
					edge_serial->bulk_in_buffer,
					usb_endpoint_maxp(endpoint),
					edge_bulk_in_callback,
					edge_serial);
				bulk_in_found = true;
			}

			if (!bulk_out_found &&
			    (usb_endpoint_is_bulk_out(endpoint))) {
				/* we found a bulk out endpoint */
				dbg("found bulk out");
				edge_serial->bulk_out_endpoint =
						endpoint->bEndpointAddress;
				bulk_out_found = true;
			}
		}

		if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
			dev_err(&dev->dev, "Error - the proper endpoints "
				"were not found!\n");
			return -ENODEV;
		}

		/* start interrupt read for this edgeport this interrupt will
		 * continue as long as the edgeport is connected */
		response = usb_submit_urb(edge_serial->interrupt_read_urb,
								GFP_KERNEL);
		if (response)
			dev_err(&dev->dev,
				"%s - Error %d submitting control urb\n",
				__func__, response);
	}
	return response;
}


/****************************************************************************
 * edge_disconnect
 *	This function is called whenever the device is removed from the usb bus.
 ****************************************************************************/
static void edge_disconnect(struct usb_serial *serial)
{
	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);

	dbg("%s", __func__);

	/* stop reads and writes on all ports */
	/* free up our endpoint stuff */
	if (edge_serial->is_epic) {
		usb_kill_urb(edge_serial->interrupt_read_urb);
		usb_free_urb(edge_serial->interrupt_read_urb);
		kfree(edge_serial->interrupt_in_buffer);

		usb_kill_urb(edge_serial->read_urb);
		usb_free_urb(edge_serial->read_urb);
		kfree(edge_serial->bulk_in_buffer);
	}
}


/****************************************************************************
 * edge_release
 *	This function is called when the device structure is deallocated.
 ****************************************************************************/
static void edge_release(struct usb_serial *serial)
{
	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
	int i;

	dbg("%s", __func__);

	for (i = 0; i < serial->num_ports; ++i)
		kfree(usb_get_serial_port_data(serial->port[i]));

	kfree(edge_serial);
}

module_usb_serial_driver(io_driver, serial_drivers);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("edgeport/boot.fw");
MODULE_FIRMWARE("edgeport/boot2.fw");
MODULE_FIRMWARE("edgeport/down.fw");
MODULE_FIRMWARE("edgeport/down2.fw");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");