io_ti.c 83.4 KB
Newer Older
L
Linus Torvalds 已提交
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
/*
 * Edgeport USB Serial Converter driver
 *
 * Copyright (C) 2000-2002 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:
 *	EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
 *
 * 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>.
 *
 * Version history:
 *
 *	July 11, 2002 	Removed 4 port device structure since all TI UMP 
 *			chips have only 2 ports 
 *			David Iacovelli (davidi@ionetworks.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 <asm/uaccess.h>
#include <asm/semaphore.h>
#include <linux/usb.h>
42
#include <linux/usb/serial.h>
L
Linus Torvalds 已提交
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

#include "io_16654.h"
#include "io_usbvend.h"
#include "io_ti.h"

/*
 * Version Information
 */
#define DRIVER_VERSION "v0.7"
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
#define DRIVER_DESC "Edgeport USB Serial Driver"


/* firmware image code */
#define IMAGE_VERSION_NAME	PagableOperationalCodeImageVersion
#define IMAGE_ARRAY_NAME	PagableOperationalCodeImage
#define IMAGE_SIZE		PagableOperationalCodeSize
#include "io_fw_down3.h"	/* Define array OperationalCodeImage[] */

#define EPROM_PAGE_SIZE		64


struct edgeport_uart_buf_desc {
	__u32 count;		// Number of bytes currently in buffer
};

/* different hardware types */
#define HARDWARE_TYPE_930	0
#define HARDWARE_TYPE_TIUMP	1

// IOCTL_PRIVATE_TI_GET_MODE Definitions
#define	TI_MODE_CONFIGURING	0   // Device has not entered start device 
#define	TI_MODE_BOOT		1   // Staying in boot mode
#define TI_MODE_DOWNLOAD	2   // Made it to download mode
#define TI_MODE_TRANSITIONING	3   // Currently in boot mode but transitioning to download mode

/* read urb state */
#define EDGE_READ_URB_RUNNING	0
#define EDGE_READ_URB_STOPPING	1
#define EDGE_READ_URB_STOPPED	2

#define EDGE_LOW_LATENCY	1
#define EDGE_CLOSING_WAIT	4000	/* in .01 sec */

#define EDGE_OUT_BUF_SIZE	1024


/* Product information read from the Edgeport */
struct product_info
{
	int	TiMode;			// Current TI Mode
	__u8	hardware_type;		// Type of hardware
} __attribute__((packed));

/* circular buffer */
struct edge_buf {
	unsigned int	buf_size;
	char		*buf_buf;
	char		*buf_get;
	char		*buf_put;
};

struct edgeport_port {
	__u16 uart_base;
	__u16 dma_address;
	__u8 shadow_msr;
	__u8 shadow_mcr;
	__u8 shadow_lsr;
	__u8 lsr_mask;
	__u32 ump_read_timeout;		/* Number of miliseconds the UMP will
					   wait without data before completing
					   a read short */
	int baud_rate;
	int close_pending;
	int lsr_event;
	struct edgeport_uart_buf_desc tx;
	struct async_icount	icount;
	wait_queue_head_t	delta_msr_wait;	/* for handling sleeping while
						   waiting for msr change to
						   happen */
	struct edgeport_serial	*edge_serial;
	struct usb_serial_port	*port;
	__u8 bUartMode;		/* Port type, 0: RS232, etc. */ 
	spinlock_t ep_lock;
	int ep_read_urb_state;
	int ep_write_urb_in_use;
	struct edge_buf *ep_out_buf;
};

struct edgeport_serial {
	struct product_info product_info;
	u8 TI_I2C_Type;			// Type of I2C in UMP
	u8 TiReadI2C;			// Set to TRUE if we have read the I2c in Boot Mode
	struct semaphore es_sem;
	int num_ports_open;
	struct usb_serial *serial;
};


/* Devices that this driver supports */
static struct usb_device_id edgeport_1port_id_table [] = {
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
	{ }
};

static struct usb_device_id edgeport_2port_id_table [] = {
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
// The 4-port shows up as two 2-port devices
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
	{ }
};

/* Devices that this driver supports */
static struct usb_device_id id_table_combined [] = {
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
	{ }
};

MODULE_DEVICE_TABLE (usb, id_table_combined);

static struct usb_driver io_driver = {
	.name =		"io_ti",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table_combined,
222
	.no_dynamic_id = 	1,
L
Linus Torvalds 已提交
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
};


static struct EDGE_FIRMWARE_VERSION_INFO OperationalCodeImageVersion;

static int debug;

static int TIStayInBootMode = 0;
static int low_latency = EDGE_LOW_LATENCY;
static int closing_wait = EDGE_CLOSING_WAIT;
static int ignore_cpu_rev = 0;


static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length);

static void stop_read(struct edgeport_port *edge_port);
static int restart_read(struct edgeport_port *edge_port);

static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios);
static void edge_send(struct usb_serial_port *port);

/* circular buffer */
static struct edge_buf *edge_buf_alloc(unsigned int size);
static void edge_buf_free(struct edge_buf *eb);
static void edge_buf_clear(struct edge_buf *eb);
static unsigned int edge_buf_data_avail(struct edge_buf *eb);
static unsigned int edge_buf_space_avail(struct edge_buf *eb);
static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
	unsigned int count);
static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
	unsigned int count);


static int TIReadVendorRequestSync (struct usb_device *dev,
				__u8		request,
				__u16		value,
				__u16		index,
				u8 		*data,
				int		size)
{
	int status;

	status = usb_control_msg (dev,
				usb_rcvctrlpipe(dev, 0),
				request,
				(USB_TYPE_VENDOR | 
				 USB_RECIP_DEVICE | 
				 USB_DIR_IN),
				value,
				index,
				data,
				size,
				1000);
	if (status < 0)
		return status;
	if (status != size) {
		dbg ("%s - wanted to write %d, but only wrote %d",
		     __FUNCTION__, size, status);
		return -ECOMM;
	}
	return 0;
}

static int TISendVendorRequestSync (struct usb_device *dev,
				__u8		request,
				__u16		value,
				__u16		index,
				u8 		*data,
				int		size)
{
	int status;

	status = usb_control_msg (dev,
				usb_sndctrlpipe(dev, 0),
				request,
				(USB_TYPE_VENDOR | 
				 USB_RECIP_DEVICE | 
				 USB_DIR_OUT),
				value,
				index,
				data,
				size,
				1000);
	if (status < 0)
		return status;
	if (status != size) {
		dbg ("%s - wanted to write %d, but only wrote %d",
		     __FUNCTION__, size, status);
		return -ECOMM;
	}
	return 0;
}

static int TIWriteCommandSync (struct usb_device *dev, __u8 command,
				__u8 moduleid, __u16 value, u8 *data,
				int size)
{
	return TISendVendorRequestSync (dev,
					  command,	  		// Request
					  value,			// wValue 
					  moduleid,			// wIndex
					  data,				// TransferBuffer
					  size);			// TransferBufferLength

}

/* clear tx/rx buffers and fifo in TI UMP */
static int TIPurgeDataSync (struct usb_serial_port *port, __u16 mask)
{
	int port_number = port->number - port->serial->minor;

	dbg ("%s - port %d, mask %x", __FUNCTION__, port_number, mask);

	return TIWriteCommandSync (port->serial->dev,
					UMPC_PURGE_PORT,
					(__u8)(UMPM_UART1_PORT + port_number),
					mask,
					NULL,
					0);
}

/**
 * TIReadDownloadMemory - Read edgeport memory from TI chip
 * @dev: usb device pointer
 * @start_address: Device CPU address at which to read
 * @length: Length of above data
 * @address_type: Can read both XDATA and I2C
 * @buffer: pointer to input data buffer
 */
static int TIReadDownloadMemory(struct usb_device *dev, int start_address,
				int length, __u8 address_type, __u8 *buffer)
{
	int status = 0;
	__u8 read_length;
	__be16 be_start_address;
	
	dbg ("%s - @ %x for %d", __FUNCTION__, start_address, length);

	/* Read in blocks of 64 bytes
	 * (TI firmware can't handle more than 64 byte reads)
	 */
	while (length) {
		if (length > 64)
			read_length= 64;
		else
			read_length = (__u8)length;

		if (read_length > 1) {
			dbg ("%s - @ %x for %d", __FUNCTION__, 
			     start_address, read_length);
		}
		be_start_address = cpu_to_be16 (start_address);
		status = TIReadVendorRequestSync (dev,
						  UMPC_MEMORY_READ,	// Request
						  (__u16)address_type,	// wValue (Address type)
						  (__force __u16)be_start_address,	// wIndex (Address to read)
						  buffer,		// TransferBuffer
						  read_length);	// TransferBufferLength

		if (status) {
			dbg ("%s - ERROR %x", __FUNCTION__, status);
			return status;
		}

		if (read_length > 1) {
			usb_serial_debug_data(debug, &dev->dev, __FUNCTION__,
					      read_length, buffer);
		}

		/* Update pointers/length */
		start_address += read_length;
		buffer += read_length;
		length -= read_length;
	}
	
	return status;
}

static int TIReadRam (struct usb_device *dev, int start_address, int length, __u8 *buffer)
{
	return TIReadDownloadMemory (dev,
				     start_address,
				     length,
				     DTK_ADDR_SPACE_XDATA,
				     buffer);
}

/* Read edgeport memory to a given block */
static int TIReadBootMemory (struct edgeport_serial *serial, int start_address, int length, __u8 * buffer)
{
	int status = 0;
	int i;

	for (i=0; i< length; i++) {
		status = TIReadVendorRequestSync (serial->serial->dev,
					UMPC_MEMORY_READ,		// Request
					serial->TI_I2C_Type,		// wValue (Address type)
					(__u16)(start_address+i),	// wIndex
					&buffer[i],			// TransferBuffer
					0x01);				// TransferBufferLength
		if (status) {
			dbg ("%s - ERROR %x", __FUNCTION__, status);
			return status;
		}
	}

	dbg ("%s - start_address = %x, length = %d", __FUNCTION__, start_address, length);
	usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, length, buffer);

	serial->TiReadI2C = 1;

	return status;
}

/* Write given block to TI EPROM memory */
static int TIWriteBootMemory (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
{
	int status = 0;
	int i;
	__u8 temp;

	/* Must do a read before write */
	if (!serial->TiReadI2C) {
		status = TIReadBootMemory(serial, 0, 1, &temp);
		if (status)
			return status;
	}

	for (i=0; i < length; ++i) {
		status = TISendVendorRequestSync (serial->serial->dev,
						UMPC_MEMORY_WRITE,		// Request
						buffer[i],			// wValue
						(__u16)(i+start_address),	// wIndex
						NULL,				// TransferBuffer
						0);				// TransferBufferLength
		if (status)
			return status;
	}

  	dbg ("%s - start_sddr = %x, length = %d", __FUNCTION__, start_address, length);
	usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, length, buffer);

	return status;
}


/* Write edgeport I2C memory to TI chip	*/
static int TIWriteDownloadI2C (struct edgeport_serial *serial, int start_address, int length, __u8 address_type, __u8 *buffer)
{
	int status = 0;
	int write_length;
	__be16 be_start_address;

	/* We can only send a maximum of 1 aligned byte page at a time */
	
	/* calulate the number of bytes left in the first page */
	write_length = EPROM_PAGE_SIZE - (start_address & (EPROM_PAGE_SIZE - 1));

	if (write_length > length)
		write_length = length;

	dbg ("%s - BytesInFirstPage Addr = %x, length = %d", __FUNCTION__, start_address, write_length);
	usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, write_length, buffer);

	/* Write first page */
	be_start_address = cpu_to_be16 (start_address);
	status = TISendVendorRequestSync (serial->serial->dev,
					UMPC_MEMORY_WRITE,	// Request
					(__u16)address_type,	// wValue
					(__force __u16)be_start_address,	// wIndex
					buffer,			// TransferBuffer
					write_length);
	if (status) {
		dbg ("%s - ERROR %d", __FUNCTION__, status);
		return status;
	}

	length		-= write_length;
	start_address	+= write_length;
	buffer		+= write_length;

	/* We should be aligned now -- can write max page size bytes at a time */
	while (length) {
		if (length > EPROM_PAGE_SIZE)
			write_length = EPROM_PAGE_SIZE;
		else
			write_length = length;

		dbg ("%s - Page Write Addr = %x, length = %d", __FUNCTION__, start_address, write_length);
		usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, write_length, buffer);

		/* Write next page */
		be_start_address = cpu_to_be16 (start_address);
		status = TISendVendorRequestSync (serial->serial->dev,
						UMPC_MEMORY_WRITE,	// Request
						(__u16)address_type,	// wValue
						(__force __u16)be_start_address,	// wIndex
						buffer,	  		// TransferBuffer
						write_length);		// TransferBufferLength
		if (status) {
			dev_err (&serial->serial->dev->dev, "%s - ERROR %d\n", __FUNCTION__, status);
			return status;
		}
		
		length		-= write_length;
		start_address	+= write_length;
		buffer		+= write_length;
	}
	return status;
}

/* Examine the UMP DMA registers and LSR
 * 
 * Check the MSBit of the X and Y DMA byte count registers.
 * A zero in this bit indicates that the TX DMA buffers are empty
 * then check the TX Empty bit in the UART.
 */
static int TIIsTxActive (struct edgeport_port *port)
{
	int status;
	struct out_endpoint_desc_block *oedb;
	__u8 *lsr;
	int bytes_left = 0;

	oedb = kmalloc (sizeof (* oedb), GFP_KERNEL);
	if (!oedb) {
		dev_err (&port->port->dev, "%s - out of memory\n", __FUNCTION__);
		return -ENOMEM;
	}

	lsr = kmalloc (1, GFP_KERNEL);	/* Sigh, that's right, just one byte,
					   as not all platforms can do DMA
					   from stack */
	if (!lsr) {
		kfree(oedb);
		return -ENOMEM;
	}
	/* Read the DMA Count Registers */
	status = TIReadRam (port->port->serial->dev,
			    port->dma_address,
			    sizeof( *oedb),
			    (void *)oedb);

	if (status)
		goto exit_is_tx_active;

	dbg ("%s - XByteCount    0x%X", __FUNCTION__, oedb->XByteCount);

	/* and the LSR */
	status = TIReadRam (port->port->serial->dev, 
			    port->uart_base + UMPMEM_OFFS_UART_LSR,
			    1,
			    lsr);

	if (status)
		goto exit_is_tx_active;
	dbg ("%s - LSR = 0x%X", __FUNCTION__, *lsr);
	
	/* If either buffer has data or we are transmitting then return TRUE */
	if ((oedb->XByteCount & 0x80 ) != 0 )
		bytes_left += 64;

	if ((*lsr & UMP_UART_LSR_TX_MASK ) == 0 )
		bytes_left += 1;

	/* We return Not Active if we get any kind of error */
exit_is_tx_active:
	dbg ("%s - return %d", __FUNCTION__, bytes_left );

	kfree(lsr);
	kfree(oedb);
	return bytes_left;
}

static void TIChasePort(struct edgeport_port *port, unsigned long timeout, int flush)
{
	int baud_rate;
	struct tty_struct *tty = port->port->tty;
	wait_queue_t wait;
	unsigned long flags;

	if (!timeout)
		timeout = (HZ*EDGE_CLOSING_WAIT)/100;

	/* wait for data to drain from the buffer */
	spin_lock_irqsave(&port->ep_lock, flags);
	init_waitqueue_entry(&wait, current);
	add_wait_queue(&tty->write_wait, &wait);
	for (;;) {
		set_current_state(TASK_INTERRUPTIBLE);
		if (edge_buf_data_avail(port->ep_out_buf) == 0
		|| timeout == 0 || signal_pending(current)
		|| !usb_get_intfdata(port->port->serial->interface))  /* disconnect */
			break;
		spin_unlock_irqrestore(&port->ep_lock, flags);
		timeout = schedule_timeout(timeout);
		spin_lock_irqsave(&port->ep_lock, flags);
	}
	set_current_state(TASK_RUNNING);
	remove_wait_queue(&tty->write_wait, &wait);
	if (flush)
		edge_buf_clear(port->ep_out_buf);
	spin_unlock_irqrestore(&port->ep_lock, flags);

	/* wait for data to drain from the device */
	timeout += jiffies;
	while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
	&& usb_get_intfdata(port->port->serial->interface)) {  /* not disconnected */
		if (!TIIsTxActive(port))
			break;
		msleep(10);
	}

	/* disconnected */
	if (!usb_get_intfdata(port->port->serial->interface))
		return;

	/* wait one more character time, based on baud rate */
	/* (TIIsTxActive doesn't seem to wait for the last byte) */
	if ((baud_rate=port->baud_rate) == 0)
		baud_rate = 50;
	msleep(max(1,(10000+baud_rate-1)/baud_rate));
}

static int TIChooseConfiguration (struct usb_device *dev)
{
	// There may be multiple configurations on this device, in which case
	// we would need to read and parse all of them to find out which one
	// we want. However, we just support one config at this point,
	// configuration # 1, which is Config Descriptor 0.

	dbg ("%s - Number of Interfaces = %d", __FUNCTION__, dev->config->desc.bNumInterfaces);
	dbg ("%s - MAX Power            = %d", __FUNCTION__, dev->config->desc.bMaxPower*2);

	if (dev->config->desc.bNumInterfaces != 1) {
		dev_err (&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __FUNCTION__);
		return -ENODEV;
	}

	return 0;
}

static int TIReadRom (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
{
	int status;

	if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
		status = TIReadDownloadMemory (serial->serial->dev,
					       start_address,
					       length,
					       serial->TI_I2C_Type,
					       buffer);
	} else {
		status = TIReadBootMemory (serial,
					   start_address,
					   length,
					   buffer);
	}

	return status;
}

static int TIWriteRom (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
{
	if (serial->product_info.TiMode == TI_MODE_BOOT)
		return TIWriteBootMemory (serial,
					  start_address,
					  length,
					  buffer);

	if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
		return TIWriteDownloadI2C (serial,
					   start_address,
					   length,
					   serial->TI_I2C_Type,
					   buffer);

	return -EINVAL;
}



/* Read a descriptor header from I2C based on type */
static int TIGetDescriptorAddress (struct edgeport_serial *serial, int desc_type, struct ti_i2c_desc *rom_desc)
{
	int start_address;
	int status;

	/* Search for requested descriptor in I2C */
	start_address = 2;
	do {
		status = TIReadRom (serial,
				   start_address,
				   sizeof(struct ti_i2c_desc),
				   (__u8 *)rom_desc );
		if (status)
			return 0;

		if (rom_desc->Type == desc_type)
			return start_address;

		start_address = start_address + sizeof(struct ti_i2c_desc) +  rom_desc->Size;

	} while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
	
	return 0;
}

/* Validate descriptor checksum */
static int ValidChecksum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
{
	__u16 i;
	__u8 cs = 0;

	for (i=0; i < rom_desc->Size; i++) {
		cs = (__u8)(cs + buffer[i]);
	}
	if (cs != rom_desc->CheckSum) {
		dbg ("%s - Mismatch %x - %x", __FUNCTION__, rom_desc->CheckSum, cs);
		return -EINVAL;
	}
	return 0;
}

/* Make sure that the I2C image is good */
static int TiValidateI2cImage (struct edgeport_serial *serial)
{
	struct device *dev = &serial->serial->dev->dev;
	int status = 0;
	struct ti_i2c_desc *rom_desc;
	int start_address = 2;
	__u8 *buffer;
	__u16 ttype;

	rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
	if (!rom_desc) {
		dev_err (dev, "%s - out of memory\n", __FUNCTION__);
		return -ENOMEM;
	}
	buffer = kmalloc (TI_MAX_I2C_SIZE, GFP_KERNEL);
	if (!buffer) {
		dev_err (dev, "%s - out of memory when allocating buffer\n", __FUNCTION__);
		kfree (rom_desc);
		return -ENOMEM;
	}

	// Read the first byte (Signature0) must be 0x52 or 0x10
	status = TIReadRom (serial, 0, 1, buffer);
	if (status)
		goto ExitTiValidateI2cImage; 

	if (*buffer != UMP5152 && *buffer != UMP3410) {
		dev_err (dev, "%s - invalid buffer signature\n", __FUNCTION__);
		status = -ENODEV;
		goto ExitTiValidateI2cImage;
	}

	do {
		// Validate the I2C
		status = TIReadRom (serial,
				start_address,
				sizeof(struct ti_i2c_desc),
				(__u8 *)rom_desc);
		if (status)
			break;

		if ((start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size) > TI_MAX_I2C_SIZE) {
			status = -ENODEV;
			dbg ("%s - structure too big, erroring out.", __FUNCTION__);
			break;
		}

		dbg ("%s Type = 0x%x", __FUNCTION__, rom_desc->Type);

		// Skip type 2 record
		ttype = rom_desc->Type & 0x0f;
		if ( ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
			&& ttype != I2C_DESC_TYPE_FIRMWARE_AUTO ) {
			// Read the descriptor data
			status = TIReadRom(serial,
						start_address+sizeof(struct ti_i2c_desc),
						rom_desc->Size,
						buffer);
			if (status)
				break;

			status = ValidChecksum(rom_desc, buffer);
			if (status)
				break;
		}
		start_address = start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size;

	} while ((rom_desc->Type != I2C_DESC_TYPE_ION) && (start_address < TI_MAX_I2C_SIZE));

	if ((rom_desc->Type != I2C_DESC_TYPE_ION) || (start_address > TI_MAX_I2C_SIZE))
		status = -ENODEV;

ExitTiValidateI2cImage:	
	kfree (buffer);
	kfree (rom_desc);
	return status;
}

static int TIReadManufDescriptor (struct edgeport_serial *serial, __u8 *buffer)
{
	int status;
	int start_address;
	struct ti_i2c_desc *rom_desc;
	struct edge_ti_manuf_descriptor *desc;

	rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
	if (!rom_desc) {
		dev_err (&serial->serial->dev->dev, "%s - out of memory\n", __FUNCTION__);
		return -ENOMEM;
	}
	start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_ION, rom_desc);

	if (!start_address) {
		dbg ("%s - Edge Descriptor not found in I2C", __FUNCTION__);
		status = -ENODEV;
		goto exit;
	}

	// Read the descriptor data
	status = TIReadRom (serial,
				start_address+sizeof(struct ti_i2c_desc),
				rom_desc->Size,
				buffer);
	if (status)
		goto exit;
	
	status = ValidChecksum(rom_desc, buffer);
	
	desc = (struct edge_ti_manuf_descriptor *)buffer;
	dbg ( "%s - IonConfig      0x%x", __FUNCTION__, desc->IonConfig 	);
	dbg ( "%s - Version          %d", __FUNCTION__, desc->Version	  	);
	dbg ( "%s - Cpu/Board      0x%x", __FUNCTION__, desc->CpuRev_BoardRev	);
	dbg ( "%s - NumPorts         %d", __FUNCTION__, desc->NumPorts  	);	
	dbg ( "%s - NumVirtualPorts  %d", __FUNCTION__, desc->NumVirtualPorts	);	
	dbg ( "%s - TotalPorts       %d", __FUNCTION__, desc->TotalPorts  	);	

exit:
	kfree (rom_desc);
	return status;
}

/* Build firmware header used for firmware update */
static int BuildI2CFirmwareHeader (__u8 *header, struct device *dev)
{
	__u8 *buffer;
	int buffer_size;
	int i;
	__u8 cs = 0;
	struct ti_i2c_desc *i2c_header;
	struct ti_i2c_image_header *img_header;
	struct ti_i2c_firmware_rec *firmware_rec;

	// In order to update the I2C firmware we must change the type 2 record to type 0xF2.
	// This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver 
	// will download the latest firmware (padded to 15.5k) into the UMP ram. 
	// And finally when the device comes back up in download mode the driver will cause 
	// the new firmware to be copied from the UMP Ram to I2C and the firmware will update
	// the record type from 0xf2 to 0x02.
	
	// Allocate a 15.5k buffer + 2 bytes for version number (Firmware Record)
	buffer_size = (((1024 * 16) - 512 )+ sizeof(struct ti_i2c_firmware_rec));

	buffer = kmalloc (buffer_size, GFP_KERNEL);
	if (!buffer) {
		dev_err (dev, "%s - out of memory\n", __FUNCTION__);
		return -ENOMEM;
	}
	
	// Set entire image of 0xffs
	memset (buffer, 0xff, buffer_size);

	// Copy version number into firmware record
	firmware_rec = (struct ti_i2c_firmware_rec *)buffer;

	firmware_rec->Ver_Major	= OperationalCodeImageVersion.MajorVersion;
	firmware_rec->Ver_Minor	= OperationalCodeImageVersion.MinorVersion;

	// Pointer to fw_down memory image
	img_header = (struct ti_i2c_image_header *)&PagableOperationalCodeImage[0];

	memcpy (buffer + sizeof(struct ti_i2c_firmware_rec),
		&PagableOperationalCodeImage[sizeof(struct ti_i2c_image_header)],
		le16_to_cpu(img_header->Length));

	for (i=0; i < buffer_size; i++) {
		cs = (__u8)(cs + buffer[i]);
	}

	kfree (buffer);

	// Build new header
	i2c_header =  (struct ti_i2c_desc *)header;
	firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
	
	i2c_header->Type	= I2C_DESC_TYPE_FIRMWARE_BLANK;
	i2c_header->Size	= (__u16)buffer_size;
	i2c_header->CheckSum	= cs;
	firmware_rec->Ver_Major	= OperationalCodeImageVersion.MajorVersion;
	firmware_rec->Ver_Minor	= OperationalCodeImageVersion.MinorVersion;

	return 0;
}

/* Try to figure out what type of I2c we have */
static int TIGetI2cTypeInBootMode (struct edgeport_serial *serial)
{
	int status;
	__u8 data;
		
	// Try to read type 2
	status = TIReadVendorRequestSync (serial->serial->dev,
					UMPC_MEMORY_READ,		// Request
					DTK_ADDR_SPACE_I2C_TYPE_II,	// wValue (Address type)
					0,		 		// wIndex
					&data,				// TransferBuffer
					0x01);				// TransferBufferLength
	if (status)
		dbg ("%s - read 2 status error = %d", __FUNCTION__, status);
	else
		dbg ("%s - read 2 data = 0x%x", __FUNCTION__, data);
	if ((!status) && (data == UMP5152 || data == UMP3410)) {
		dbg ("%s - ROM_TYPE_II", __FUNCTION__);
		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
		return 0;
	}

	// Try to read type 3
	status = TIReadVendorRequestSync (serial->serial->dev,
					UMPC_MEMORY_READ,		// Request
					DTK_ADDR_SPACE_I2C_TYPE_III,	// wValue (Address type)
					0,				// wIndex
					&data,				// TransferBuffer
					0x01);				// TransferBufferLength
	if (status)
		dbg ("%s - read 3 status error = %d", __FUNCTION__, status);
	else
		dbg ("%s - read 2 data = 0x%x", __FUNCTION__, data);
	if ((!status) && (data == UMP5152 || data == UMP3410)) {
		dbg ("%s - ROM_TYPE_III", __FUNCTION__);
		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
		return 0;
	}

	dbg ("%s - Unknown", __FUNCTION__);
	serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
	return -ENODEV;
}

static int TISendBulkTransferSync (struct usb_serial *serial, void *buffer, int length, int *num_sent)
{
	int status;

	status = usb_bulk_msg (serial->dev,
				usb_sndbulkpipe(serial->dev,
						serial->port[0]->bulk_out_endpointAddress),
				buffer,
				length,
				num_sent,
				1000);
	return status;
}

/* Download given firmware image to the device (IN BOOT MODE) */
static int TIDownloadCodeImage (struct edgeport_serial *serial, __u8 *image, int image_length)
{
	int status = 0;
	int pos;
	int transfer;
	int done;

	// Transfer firmware image
	for (pos = 0; pos < image_length; ) {
		// Read the next buffer from file
		transfer = image_length - pos;
		if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
			transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;

		// Transfer data
		status = TISendBulkTransferSync (serial->serial, &image[pos], transfer, &done);
		if (status)
			break;
		// Advance buffer pointer
		pos += done;
	}

	return status;
}

// FIXME!!!
static int TIConfigureBootDevice (struct usb_device *dev)
{
	return 0;
}

/**
 * DownloadTIFirmware - Download run-time operating firmware to the TI5052
 * 
 * This routine downloads the main operating code into the TI5052, using the
 * boot code already burned into E2PROM or ROM.
 */
static int TIDownloadFirmware (struct edgeport_serial *serial)
{
	struct device *dev = &serial->serial->dev->dev;
	int status = 0;
	int start_address;
	struct edge_ti_manuf_descriptor *ti_manuf_desc;
	struct usb_interface_descriptor *interface;
	int download_cur_ver;
	int download_new_ver;

	/* This routine is entered by both the BOOT mode and the Download mode
	 * We can determine which code is running by the reading the config
	 * descriptor and if we have only one bulk pipe it is in boot mode
	 */
	serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;

	/* Default to type 2 i2c */
	serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;

	status = TIChooseConfiguration (serial->serial->dev);
	if (status)
		return status;

	interface = &serial->serial->interface->cur_altsetting->desc;
	if (!interface) {
		dev_err (dev, "%s - no interface set, error!\n", __FUNCTION__);
		return -ENODEV;
	}

	// Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
	// if we have more than one endpoint we are definitely in download mode
	if (interface->bNumEndpoints > 1)
		serial->product_info.TiMode = TI_MODE_DOWNLOAD;
	else
		// Otherwise we will remain in configuring mode
		serial->product_info.TiMode = TI_MODE_CONFIGURING;

	// Save Download Version Number
	OperationalCodeImageVersion.MajorVersion = PagableOperationalCodeImageVersion.MajorVersion;
	OperationalCodeImageVersion.MinorVersion = PagableOperationalCodeImageVersion.MinorVersion;
	OperationalCodeImageVersion.BuildNumber	 = PagableOperationalCodeImageVersion.BuildNumber;

	/********************************************************************/
	/* Download Mode */
	/********************************************************************/
	if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
		struct ti_i2c_desc *rom_desc;

		dbg ("%s - <<<<<<<<<<<<<<<RUNNING IN DOWNLOAD MODE>>>>>>>>>>", __FUNCTION__);

		status = TiValidateI2cImage (serial);
		if (status) {
			dbg ("%s - <<<<<<<<<<<<<<<DOWNLOAD MODE -- BAD I2C >>>>>>>>>>",
			     __FUNCTION__);
			return status;
		}
		
		/* Validate Hardware version number
		 * Read Manufacturing Descriptor from TI Based Edgeport
		 */
		ti_manuf_desc = kmalloc (sizeof (*ti_manuf_desc), GFP_KERNEL);
		if (!ti_manuf_desc) {
			dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
			return -ENOMEM;
		}
		status = TIReadManufDescriptor (serial, (__u8 *)ti_manuf_desc);
		if (status) {
			kfree (ti_manuf_desc);
			return status;
		}

		// Check version number of ION descriptor
		if (!ignore_cpu_rev && TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev) < 2) {
			dbg ( "%s - Wrong CPU Rev %d (Must be 2)", __FUNCTION__, 
			     TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev));
			kfree (ti_manuf_desc);
		   	return -EINVAL;
		}

		rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
		if (!rom_desc) {
			dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
			kfree (ti_manuf_desc);
			return -ENOMEM;
		}

		// Search for type 2 record (firmware record)
		if ((start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc)) != 0) {
			struct ti_i2c_firmware_rec *firmware_version;
			__u8 record;

			dbg ("%s - Found Type FIRMWARE (Type 2) record", __FUNCTION__);

			firmware_version = kmalloc (sizeof (*firmware_version), GFP_KERNEL);
			if (!firmware_version) {
				dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return -ENOMEM;
			}

			// Validate version number				
			// Read the descriptor data
			status = TIReadRom (serial,
					start_address+sizeof(struct ti_i2c_desc),
					sizeof(struct ti_i2c_firmware_rec),
					(__u8 *)firmware_version);
			if (status) {
				kfree (firmware_version);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return status;
			}

			// Check version number of download with current version in I2c
			download_cur_ver = (firmware_version->Ver_Major << 8) + 
					   (firmware_version->Ver_Minor);
			download_new_ver = (OperationalCodeImageVersion.MajorVersion << 8) +
					   (OperationalCodeImageVersion.MinorVersion);

			dbg ("%s - >>>Firmware Versions Device %d.%d  Driver %d.%d",
			     __FUNCTION__,
			     firmware_version->Ver_Major,
			     firmware_version->Ver_Minor,
			     OperationalCodeImageVersion.MajorVersion,
			     OperationalCodeImageVersion.MinorVersion);

			// Check if we have an old version in the I2C and update if necessary
			if (download_cur_ver != download_new_ver) {
				dbg ("%s - Update I2C Download from %d.%d to %d.%d",
				     __FUNCTION__,
				     firmware_version->Ver_Major,
				     firmware_version->Ver_Minor,
				     OperationalCodeImageVersion.MajorVersion,
				     OperationalCodeImageVersion.MinorVersion);

				// In order to update the I2C firmware we must change the type 2 record to type 0xF2.
				// This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver 
				// will download the latest firmware (padded to 15.5k) into the UMP ram. 
				// And finally when the device comes back up in download mode the driver will cause 
				// the new firmware to be copied from the UMP Ram to I2C and the firmware will update
				// the record type from 0xf2 to 0x02.

				record = I2C_DESC_TYPE_FIRMWARE_BLANK;

				// Change the I2C Firmware record type to 0xf2 to trigger an update
				status = TIWriteRom (serial,
							start_address,
							sizeof(record),
							&record);
				if (status) {
					kfree (firmware_version);
					kfree (rom_desc);
					kfree (ti_manuf_desc);
					return status;
				}

				// verify the write -- must do this in order for write to 
				// complete before we do the hardware reset
				status = TIReadRom (serial,
							start_address,
							sizeof(record),
							&record);

				if (status) {
					kfree (firmware_version);
					kfree (rom_desc);
					kfree (ti_manuf_desc);
					return status;
				}

				if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
					dev_err (dev, "%s - error resetting device\n", __FUNCTION__);
					kfree (firmware_version);
					kfree (rom_desc);
					kfree (ti_manuf_desc);
					return -ENODEV;
				}

				dbg ("%s - HARDWARE RESET", __FUNCTION__);

				// Reset UMP -- Back to BOOT MODE
				status = TISendVendorRequestSync (serial->serial->dev,
								UMPC_HARDWARE_RESET,	// Request
								0,			// wValue
								0,			// wIndex
								NULL,			// TransferBuffer
								0);			// TransferBufferLength

				dbg ( "%s - HARDWARE RESET return %d", __FUNCTION__, status);

				/* return an error on purpose. */
				kfree (firmware_version);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return -ENODEV;
			}
			kfree (firmware_version);
		}
		// Search for type 0xF2 record (firmware blank record)
		else if ((start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
			#define HEADER_SIZE	(sizeof(struct ti_i2c_desc) + sizeof(struct ti_i2c_firmware_rec))
			__u8 *header;
			__u8 *vheader;

			header  = kmalloc (HEADER_SIZE, GFP_KERNEL);
			if (!header) {
				dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return -ENOMEM;
			}
				
			vheader = kmalloc (HEADER_SIZE, GFP_KERNEL);
			if (!vheader) {
				dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
				kfree (header);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return -ENOMEM;
			}
			
			dbg ("%s - Found Type BLANK FIRMWARE (Type F2) record", __FUNCTION__);

			// In order to update the I2C firmware we must change the type 2 record to type 0xF2.
			// This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver 
			// will download the latest firmware (padded to 15.5k) into the UMP ram. 
			// And finally when the device comes back up in download mode the driver will cause 
			// the new firmware to be copied from the UMP Ram to I2C and the firmware will update
			// the record type from 0xf2 to 0x02.
			status = BuildI2CFirmwareHeader(header, dev);
			if (status) {
				kfree (vheader);
				kfree (header);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return status;
			}

			// Update I2C with type 0xf2 record with correct size and checksum
			status = TIWriteRom (serial,
						start_address,
						HEADER_SIZE,
						header);
			if (status) {
				kfree (vheader);
				kfree (header);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return status;
			}

			// verify the write -- must do this in order for write to 
			// complete before we do the hardware reset
			status = TIReadRom (serial,
						start_address,
						HEADER_SIZE,
						vheader);

			if (status) {
				dbg ("%s - can't read header back", __FUNCTION__);
				kfree (vheader);
				kfree (header);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return status;
			}
			if (memcmp(vheader, header, HEADER_SIZE)) {
				dbg ("%s - write download record failed", __FUNCTION__);
				kfree (vheader);
				kfree (header);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return status;
			}

			kfree (vheader);
			kfree (header);

			dbg ("%s - Start firmware update", __FUNCTION__);

			// Tell firmware to copy download image into I2C 
			status = TISendVendorRequestSync (serial->serial->dev,
						UMPC_COPY_DNLD_TO_I2C,	// Request
						0,			// wValue 
						0,			// wIndex
						NULL,			// TransferBuffer
						0);			// TransferBufferLength

		  	dbg ("%s - Update complete 0x%x", __FUNCTION__, status);
			if (status) {
				dev_err (dev, "%s - UMPC_COPY_DNLD_TO_I2C failed\n", __FUNCTION__);
				kfree (rom_desc);
				kfree (ti_manuf_desc);
				return status;
			}
		}

		// The device is running the download code
		kfree (rom_desc);
		kfree (ti_manuf_desc);
		return 0;
	}

	/********************************************************************/
	/* Boot Mode */
	/********************************************************************/
	dbg ("%s - <<<<<<<<<<<<<<<RUNNING IN BOOT MODE>>>>>>>>>>>>>>>",
	     __FUNCTION__);

	// Configure the TI device so we can use the BULK pipes for download
	status = TIConfigureBootDevice (serial->serial->dev);
	if (status)
		return status;

	if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) != USB_VENDOR_ID_ION) {
		dbg ("%s - VID = 0x%x", __FUNCTION__,
		     le16_to_cpu(serial->serial->dev->descriptor.idVendor));
		serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
		goto StayInBootMode;
	}

	// We have an ION device (I2c Must be programmed)
	// Determine I2C image type
	if (TIGetI2cTypeInBootMode(serial)) {
		goto StayInBootMode;
	}

	// Registry variable set?
	if (TIStayInBootMode) {
		dbg ("%s - TIStayInBootMode", __FUNCTION__);
		goto StayInBootMode;
	}

	// Check for ION Vendor ID and that the I2C is valid
	if (!TiValidateI2cImage(serial)) {
		struct ti_i2c_image_header *header;
		int i;
		__u8 cs = 0;
		__u8 *buffer;
		int buffer_size;

		/* Validate Hardware version number
		 * Read Manufacturing Descriptor from TI Based Edgeport
		 */
		ti_manuf_desc = kmalloc (sizeof (*ti_manuf_desc), GFP_KERNEL);
		if (!ti_manuf_desc) {
			dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
			return -ENOMEM;
		}
		status = TIReadManufDescriptor (serial, (__u8 *)ti_manuf_desc);
		if (status) {
			kfree (ti_manuf_desc);
			goto StayInBootMode;
		}

		// Check for version 2
		if (!ignore_cpu_rev && TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev) < 2) {
			dbg ("%s - Wrong CPU Rev %d (Must be 2)", __FUNCTION__,
			     TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev));
			kfree (ti_manuf_desc);
			goto StayInBootMode;
		}

		kfree (ti_manuf_desc);

		// In order to update the I2C firmware we must change the type 2 record to type 0xF2.
		// This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver 
		// will download the latest firmware (padded to 15.5k) into the UMP ram. 
		// And finally when the device comes back up in download mode the driver will cause 
		// the new firmware to be copied from the UMP Ram to I2C and the firmware will update
		// the record type from 0xf2 to 0x02.
		
		/*
		 * Do we really have to copy the whole firmware image,
		 * or could we do this in place!
		 */

		// Allocate a 15.5k buffer + 3 byte header
		buffer_size = (((1024 * 16) - 512) + sizeof(struct ti_i2c_image_header));
		buffer = kmalloc (buffer_size, GFP_KERNEL);
		if (!buffer) {
			dev_err (dev, "%s - out of memory\n", __FUNCTION__);
			return -ENOMEM;
		}
		
		// Initialize the buffer to 0xff (pad the buffer)
		memset (buffer, 0xff, buffer_size);

		memcpy (buffer, &PagableOperationalCodeImage[0], PagableOperationalCodeSize);

		for(i = sizeof(struct ti_i2c_image_header); i < buffer_size; i++) {
			cs = (__u8)(cs + buffer[i]);
		}
		
		header = (struct ti_i2c_image_header *)buffer;
		
		// update length and checksum after padding
		header->Length 	 = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_i2c_image_header)));
		header->CheckSum = cs;

		// Download the operational code 
		dbg ("%s - Downloading operational code image (TI UMP)", __FUNCTION__);
		status = TIDownloadCodeImage (serial, buffer, buffer_size);

		kfree (buffer);

		if (status) {
	  		dbg ("%s - Error downloading operational code image", __FUNCTION__);
			return status;
		}

		// Device will reboot
		serial->product_info.TiMode = TI_MODE_TRANSITIONING;

  		dbg ("%s - Download successful -- Device rebooting...", __FUNCTION__);

		/* return an error on purpose */
		return -ENODEV;
	}

StayInBootMode:
	// Eprom is invalid or blank stay in boot mode
	dbg ("%s - <<<<<<<<<<<<<<<STAYING IN BOOT MODE>>>>>>>>>>>>", __FUNCTION__);
	serial->product_info.TiMode = TI_MODE_BOOT;

	return 0;
}


static int TISetDtr (struct edgeport_port *port)
{
	int port_number = port->port->number - port->port->serial->minor;

	dbg ("%s", __FUNCTION__);
	port->shadow_mcr |= MCR_DTR;

	return TIWriteCommandSync (port->port->serial->dev,
				UMPC_SET_CLR_DTR,
				(__u8)(UMPM_UART1_PORT + port_number),
				1,	/* set */
				NULL,
				0);
}

static int TIClearDtr (struct edgeport_port *port)
{
	int port_number = port->port->number - port->port->serial->minor;

	dbg ("%s", __FUNCTION__);
	port->shadow_mcr &= ~MCR_DTR;

	return TIWriteCommandSync (port->port->serial->dev,
				UMPC_SET_CLR_DTR,
				(__u8)(UMPM_UART1_PORT + port_number),
				0,	/* clear */
				NULL,
				0);
}

static int TISetRts (struct edgeport_port *port)
{
	int port_number = port->port->number - port->port->serial->minor;

	dbg ("%s", __FUNCTION__);
	port->shadow_mcr |= MCR_RTS;

	return TIWriteCommandSync (port->port->serial->dev,
				UMPC_SET_CLR_RTS,
				(__u8)(UMPM_UART1_PORT + port_number),
				1,	/* set */
				NULL,
				0);
}

static int TIClearRts (struct edgeport_port *port)
{
	int port_number = port->port->number - port->port->serial->minor;

	dbg ("%s", __FUNCTION__);
	port->shadow_mcr &= ~MCR_RTS;

	return TIWriteCommandSync (port->port->serial->dev,
				UMPC_SET_CLR_RTS,
				(__u8)(UMPM_UART1_PORT + port_number),
				0,	/* clear */
				NULL,
				0);
}

static int TISetLoopBack (struct edgeport_port *port)
{
	int port_number = port->port->number - port->port->serial->minor;

	dbg ("%s", __FUNCTION__);

	return TIWriteCommandSync (port->port->serial->dev,
				UMPC_SET_CLR_LOOPBACK,
				(__u8)(UMPM_UART1_PORT + port_number),
				1,	/* set */
				NULL,
				0);
}

static int TIClearLoopBack (struct edgeport_port *port)
{
	int port_number = port->port->number - port->port->serial->minor;

	dbg ("%s", __FUNCTION__);

	return TIWriteCommandSync (port->port->serial->dev,
				UMPC_SET_CLR_LOOPBACK,
				(__u8)(UMPM_UART1_PORT + port_number),
				0,	/* clear */
				NULL,
				0);
}

static int TISetBreak (struct edgeport_port *port)
{
	int port_number = port->port->number - port->port->serial->minor;

	dbg ("%s", __FUNCTION__);

	return TIWriteCommandSync (port->port->serial->dev,
				UMPC_SET_CLR_BREAK,
				(__u8)(UMPM_UART1_PORT + port_number),
				1,	/* set */
				NULL,
				0);
}

static int TIClearBreak (struct edgeport_port *port)
{
	int port_number = port->port->number - port->port->serial->minor;

	dbg ("%s", __FUNCTION__);

	return TIWriteCommandSync (port->port->serial->dev,
				UMPC_SET_CLR_BREAK,
				(__u8)(UMPM_UART1_PORT + port_number),
				0,	/* clear */
				NULL,
				0);
}

static int TIRestoreMCR (struct edgeport_port *port, __u8 mcr)
{
	int status = 0;

	dbg ("%s - %x", __FUNCTION__, mcr);

	if (mcr & MCR_DTR)
		status = TISetDtr (port);
	else
		status = TIClearDtr (port);

	if (status)
		return status;

	if (mcr & MCR_RTS)
		status = TISetRts (port);
	else
		status = TIClearRts (port);

	if (status)
		return status;

	if (mcr & MCR_LOOPBACK)
		status = TISetLoopBack (port);
	else
		status = TIClearLoopBack (port);

	return status;
}



/* Convert TI LSR to standard UART flags */
static __u8 MapLineStatus (__u8 ti_lsr)
{
	__u8 lsr = 0;

#define MAP_FLAG(flagUmp, flagUart)    \
	if (ti_lsr & flagUmp) \
		lsr |= flagUart;

	MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)	/* overrun */
	MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)	/* parity error */
	MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)	/* framing error */
	MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)	/* break detected */
	MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)	/* receive data available */
	MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)	/* transmit holding register empty */

#undef MAP_FLAG

	return lsr;
}

static void handle_new_msr (struct edgeport_port *edge_port, __u8 msr)
{
	struct async_icount *icount;
	struct tty_struct *tty;

	dbg ("%s - %02x", __FUNCTION__, msr);

	if (msr & (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 (msr & EDGEPORT_MSR_DELTA_CTS)
			icount->cts++;
		if (msr & EDGEPORT_MSR_DELTA_DSR)
			icount->dsr++;
		if (msr & EDGEPORT_MSR_DELTA_CD)
			icount->dcd++;
		if (msr & EDGEPORT_MSR_DELTA_RI)
			icount->rng++;
		wake_up_interruptible (&edge_port->delta_msr_wait);
	}

	/* Save the new modem status */
	edge_port->shadow_msr = msr & 0xf0;

	tty = edge_port->port->tty;
	/* handle CTS flow control */
	if (tty && C_CRTSCTS(tty)) {
		if (msr & EDGEPORT_MSR_CTS) {
			tty->hw_stopped = 0;
			tty_wakeup(tty);
		} else {
			tty->hw_stopped = 1;
		}
	}

	return;
}

static void handle_new_lsr (struct edgeport_port *edge_port, int lsr_data, __u8 lsr, __u8 data)
{
	struct async_icount *icount;
	__u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));

	dbg ("%s - %02x", __FUNCTION__, new_lsr);

	edge_port->shadow_lsr = lsr;

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

	/* Place LSR data byte into Rx buffer */
	if (lsr_data && edge_port->port->tty)
		edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);

	/* update input line counters */
	icount = &edge_port->icount;
	if (new_lsr & LSR_BREAK)
		icount->brk++;
	if (new_lsr & LSR_OVER_ERR)
		icount->overrun++;
	if (new_lsr & LSR_PAR_ERR)
		icount->parity++;
	if (new_lsr & LSR_FRM_ERR)
		icount->frame++;
}


static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs)
{
	struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
	struct usb_serial_port *port;
	struct edgeport_port *edge_port;
	unsigned char *data = urb->transfer_buffer;
	int length = urb->actual_length;
	int port_number;
	int function;
	int status;
	__u8 lsr;
	__u8 msr;

	dbg("%s", __FUNCTION__);

	switch (urb->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", __FUNCTION__, urb->status);
		return;
	default:
		dev_err(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __FUNCTION__, urb->status);
		goto exit;
	}

	if (!length) {
		dbg ("%s - no data in urb", __FUNCTION__);
		goto exit;
	}
		
	usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
		
	if (length != 2) {
		dbg ("%s - expecting packet of size 2, got %d", __FUNCTION__, length);
		goto exit;
	}

	port_number = TIUMP_GET_PORT_FROM_CODE (data[0]);
	function    = TIUMP_GET_FUNC_FROM_CODE (data[0]);
	dbg ("%s - port_number %d, function %d, info 0x%x",
	     __FUNCTION__, port_number, function, data[1]);
	port = edge_serial->serial->port[port_number];
	edge_port = usb_get_serial_port_data(port);
	if (!edge_port) {
		dbg ("%s - edge_port not found", __FUNCTION__);
		return;
	}
	switch (function) {
	case TIUMP_INTERRUPT_CODE_LSR:
		lsr = MapLineStatus(data[1]);
		if (lsr & UMP_UART_LSR_DATA_MASK) {
			/* Save the LSR event for bulk read completion routine */
			dbg ("%s - LSR Event Port %u LSR Status = %02x",
			     __FUNCTION__, port_number, lsr);
			edge_port->lsr_event = 1;
			edge_port->lsr_mask = lsr;
		} else {
			dbg ("%s - ===== Port %d LSR Status = %02x ======",
			     __FUNCTION__, port_number, lsr);
			handle_new_lsr (edge_port, 0, lsr, 0);
		}
		break;

	case TIUMP_INTERRUPT_CODE_MSR:	// MSR
		/* Copy MSR from UMP */
		msr = data[1];
		dbg ("%s - ===== Port %u MSR Status = %02x ======\n",
		     __FUNCTION__, port_number, msr);
		handle_new_msr (edge_port, msr);
		break;

	default:
		dev_err (&urb->dev->dev, "%s - Unknown Interrupt code from UMP %x\n",
			 __FUNCTION__, data[1]);
		break;
		
	}

exit:
	status = usb_submit_urb (urb, GFP_ATOMIC);
	if (status)
		dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
			 __FUNCTION__, status);
}

static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs)
{
	struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
	unsigned char *data = urb->transfer_buffer;
	struct tty_struct *tty;
	int status = 0;
	int port_number;

	dbg("%s", __FUNCTION__);

	switch (urb->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", __FUNCTION__, urb->status);
		return;
	default:
		dev_err (&urb->dev->dev,"%s - nonzero read bulk status received: %d\n",
		     __FUNCTION__, urb->status );
	}

	if (urb->status == -EPIPE)
		goto exit;

	if (urb->status) {
		dev_err(&urb->dev->dev,"%s - stopping read!\n", __FUNCTION__);
		return;
	}

	port_number = edge_port->port->number - edge_port->port->serial->minor;

	if (edge_port->lsr_event) {
		edge_port->lsr_event = 0;
		dbg ("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
		     __FUNCTION__, port_number, edge_port->lsr_mask, *data);
		handle_new_lsr (edge_port, 1, edge_port->lsr_mask, *data);
		/* Adjust buffer length/pointer */
		--urb->actual_length;
		++data;
	}

	tty = edge_port->port->tty;
	if (tty && urb->actual_length) {
		usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, urb->actual_length, data);

		if (edge_port->close_pending) {
			dbg ("%s - close is pending, dropping data on the floor.", __FUNCTION__);
		} else {
			edge_tty_recv(&edge_port->port->dev, tty, data, urb->actual_length);
		}
		edge_port->icount.rx += urb->actual_length;
	}

exit:
	/* continue read unless stopped */
	spin_lock(&edge_port->ep_lock);
	if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
		urb->dev = edge_port->port->serial->dev;
		status = usb_submit_urb(urb, GFP_ATOMIC);
	} else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
		edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
	}
	spin_unlock(&edge_port->ep_lock);
	if (status)
		dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
			 __FUNCTION__, status);
}

static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
{
	int cnt;

	do {
A
Alan Cox 已提交
1867 1868 1869 1870 1871 1872
		cnt = tty_buffer_request_room(tty, length);
		if (cnt < length) {
			dev_err(dev, "%s - dropping data, %d bytes lost\n",
				__FUNCTION__, length - cnt);
			if(cnt == 0)
				break;
L
Linus Torvalds 已提交
1873
		}
A
Alan Cox 已提交
1874
		tty_insert_flip_string(tty, data, cnt);
L
Linus Torvalds 已提交
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
		data += cnt;
		length -= cnt;
	} while (length > 0);

	tty_flip_buffer_push(tty);
}

static void edge_bulk_out_callback (struct urb *urb, struct pt_regs *regs)
{
	struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);

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

	edge_port->ep_write_urb_in_use = 0;

	switch (urb->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", __FUNCTION__, urb->status);
		return;
	default:
		dev_err (&urb->dev->dev,"%s - nonzero write bulk status received: %d\n",
		     __FUNCTION__, urb->status);
	}

	/* send any buffered data */
	edge_send(port);
}

static int edge_open (struct usb_serial_port *port, struct file * filp)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct edgeport_serial *edge_serial;
	struct usb_device *dev;
	struct urb *urb;
	int port_number;
	int status;
	u16 open_settings;
	u8 transaction_timeout;

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

	if (edge_port == NULL)
		return -ENODEV;

	if (port->tty)
		port->tty->low_latency = low_latency;

	port_number = port->number - port->serial->minor;
	switch (port_number) {
		case 0:
			edge_port->uart_base = UMPMEM_BASE_UART1;
			edge_port->dma_address = UMPD_OEDB1_ADDRESS;
			break;
		case 1:
			edge_port->uart_base = UMPMEM_BASE_UART2;
			edge_port->dma_address = UMPD_OEDB2_ADDRESS;
			break;
		default:
			dev_err (&port->dev, "Unknown port number!!!\n");
			return -ENODEV;
	}

	dbg ("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
	     __FUNCTION__, port_number, edge_port->uart_base, edge_port->dma_address);

	dev = port->serial->dev;

	memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
	init_waitqueue_head (&edge_port->delta_msr_wait);

	/* turn off loopback */
	status = TIClearLoopBack (edge_port);
	if (status) {
		dev_err(&port->dev,"%s - cannot send clear loopback command, %d\n",
			__FUNCTION__, status);
		return status;
	}
	
	/* set up the port settings */
	edge_set_termios (port, NULL);

	/* open up the port */

	/* milliseconds to timeout for DMA transfer */
	transaction_timeout = 2;

	edge_port->ump_read_timeout = max (20, ((transaction_timeout * 3) / 2) );

	// milliseconds to timeout for DMA transfer
	open_settings = (u8)(UMP_DMA_MODE_CONTINOUS | 
			     UMP_PIPE_TRANS_TIMEOUT_ENA | 
			     (transaction_timeout << 2));

	dbg ("%s - Sending UMPC_OPEN_PORT", __FUNCTION__);

	/* Tell TI to open and start the port */
	status = TIWriteCommandSync (dev,
					UMPC_OPEN_PORT,
					(u8)(UMPM_UART1_PORT + port_number),
					open_settings,
					NULL,
					0);
	if (status) {
		dev_err(&port->dev,"%s - cannot send open command, %d\n", __FUNCTION__, status);
		return status;
	}

	/* Start the DMA? */
	status = TIWriteCommandSync (dev,
					UMPC_START_PORT,
					(u8)(UMPM_UART1_PORT + port_number),
					0,
					NULL,
					0);
	if (status) {
		dev_err(&port->dev,"%s - cannot send start DMA command, %d\n", __FUNCTION__, status);
		return status;
	}

	/* Clear TX and RX buffers in UMP */
	status = TIPurgeDataSync (port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
	if (status) {
		dev_err(&port->dev,"%s - cannot send clear buffers command, %d\n", __FUNCTION__, status);
		return status;
	}

	/* Read Initial MSR */
	status = TIReadVendorRequestSync (dev,
					UMPC_READ_MSR,	// Request
					0,		// wValue
					(__u16)(UMPM_UART1_PORT + port_number),	// wIndex (Address)
					&edge_port->shadow_msr,			// TransferBuffer
					1);					// TransferBufferLength
	if (status) {
 		dev_err(&port->dev,"%s - cannot send read MSR command, %d\n", __FUNCTION__, status);
		return status;
	}

	dbg ("ShadowMSR 0x%X", edge_port->shadow_msr);
 
	/* Set Initial MCR */
	edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
	dbg ("ShadowMCR 0x%X", edge_port->shadow_mcr);

	edge_serial = edge_port->edge_serial;
	if (down_interruptible(&edge_serial->es_sem))
		return -ERESTARTSYS;
	if (edge_serial->num_ports_open == 0) {
		/* we are the first port to be opened, let's post the interrupt urb */
		urb = edge_serial->serial->port[0]->interrupt_in_urb;
		if (!urb) {
			dev_err (&port->dev, "%s - no interrupt urb present, exiting\n", __FUNCTION__);
			status = -EINVAL;
			goto up_es_sem;
		}
		urb->complete = edge_interrupt_callback;
		urb->context = edge_serial;
		urb->dev = dev;
		status = usb_submit_urb (urb, GFP_KERNEL);
		if (status) {
			dev_err (&port->dev, "%s - usb_submit_urb failed with value %d\n", __FUNCTION__, status);
			goto up_es_sem;
		}
	}

	/*
	 * reset the data toggle on the bulk endpoints to work around bug in
	 * host controllers where things get out of sync some times
	 */
	usb_clear_halt (dev, port->write_urb->pipe);
	usb_clear_halt (dev, port->read_urb->pipe);

	/* start up our bulk read urb */
	urb = port->read_urb;
	if (!urb) {
		dev_err (&port->dev, "%s - no read urb present, exiting\n", __FUNCTION__);
		status = -EINVAL;
		goto unlink_int_urb;
	}
	edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
	urb->complete = edge_bulk_in_callback;
	urb->context = edge_port;
	urb->dev = dev;
	status = usb_submit_urb (urb, GFP_KERNEL);
	if (status) {
		dev_err (&port->dev, "%s - read bulk usb_submit_urb failed with value %d\n", __FUNCTION__, status);
		goto unlink_int_urb;
	}

	++edge_serial->num_ports_open;

	dbg("%s - exited", __FUNCTION__);

	goto up_es_sem;

unlink_int_urb:
	if (edge_port->edge_serial->num_ports_open == 0)
		usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
up_es_sem:
	up(&edge_serial->es_sem);
	return status;
}

static void edge_close (struct usb_serial_port *port, struct file *filp)
{
	struct edgeport_serial *edge_serial;
	struct edgeport_port *edge_port;
	int port_number;
	int status;

	dbg("%s - port %d", __FUNCTION__, 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;
	
	/* The bulkreadcompletion routine will check 
	 * this flag and dump add read data */
	edge_port->close_pending = 1;

	/* chase the port close and flush */
	TIChasePort (edge_port, (HZ*closing_wait)/100, 1);

	usb_kill_urb(port->read_urb);
	usb_kill_urb(port->write_urb);
	edge_port->ep_write_urb_in_use = 0;

	/* assuming we can still talk to the device,
	 * send a close port command to it */
	dbg("%s - send umpc_close_port", __FUNCTION__);
	port_number = port->number - port->serial->minor;
	status = TIWriteCommandSync (port->serial->dev,
				     UMPC_CLOSE_PORT,
				     (__u8)(UMPM_UART1_PORT + port_number),
				     0,
				     NULL,
				     0);
	down(&edge_serial->es_sem);
	--edge_port->edge_serial->num_ports_open;
	if (edge_port->edge_serial->num_ports_open <= 0) {
		/* last port is now closed, let's shut down our interrupt urb */
		usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
		edge_port->edge_serial->num_ports_open = 0;
	}
	up(&edge_serial->es_sem);
	edge_port->close_pending = 0;

	dbg("%s - exited", __FUNCTION__);
}

static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	unsigned long flags;

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

	if (count == 0) {
		dbg("%s - write request of 0 bytes", __FUNCTION__);
		return 0;
	}

	if (edge_port == NULL)
		return -ENODEV;
	if (edge_port->close_pending == 1)
		return -ENODEV;

	spin_lock_irqsave(&edge_port->ep_lock, flags);
	count = edge_buf_put(edge_port->ep_out_buf, data, count);
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

	edge_send(port);

	return count;
}

static void edge_send(struct usb_serial_port *port)
{
	int count, result;
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct tty_struct *tty = port->tty;
	unsigned long flags;


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

	spin_lock_irqsave(&edge_port->ep_lock, flags);

	if (edge_port->ep_write_urb_in_use) {
		spin_unlock_irqrestore(&edge_port->ep_lock, flags);
		return;
	}

	count = edge_buf_get(edge_port->ep_out_buf,
				port->write_urb->transfer_buffer,
				port->bulk_out_size);

	if (count == 0) {
		spin_unlock_irqrestore(&edge_port->ep_lock, flags);
		return;
	}

	edge_port->ep_write_urb_in_use = 1;

	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

	usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);

	/* set up our urb */
	usb_fill_bulk_urb (port->write_urb, port->serial->dev,
			   usb_sndbulkpipe (port->serial->dev,
					    port->bulk_out_endpointAddress),
			   port->write_urb->transfer_buffer, count,
			   edge_bulk_out_callback,
			   port);

	/* send the data out the bulk port */
	result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
	if (result) {
		dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
		edge_port->ep_write_urb_in_use = 0;
		// TODO: reschedule edge_send
	} else {
		edge_port->icount.tx += count;
	}

	/* wakeup any process waiting for writes to complete */
	/* there is now more room in the buffer for new writes */
	if (tty) {
		/* let the tty driver wakeup if it has a special write_wakeup function */
		tty_wakeup(tty);
	}
}

static int edge_write_room (struct usb_serial_port *port)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int room = 0;
	unsigned long flags;

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

	if (edge_port == NULL)
		return -ENODEV;
	if (edge_port->close_pending == 1)
		return -ENODEV;

	spin_lock_irqsave(&edge_port->ep_lock, flags);
	room = edge_buf_space_avail(edge_port->ep_out_buf);
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

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

static int edge_chars_in_buffer (struct usb_serial_port *port)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int chars = 0;
	unsigned long flags;

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

	if (edge_port == NULL)
		return -ENODEV;
	if (edge_port->close_pending == 1)
		return -ENODEV;

	spin_lock_irqsave(&edge_port->ep_lock, flags);
	chars = edge_buf_data_avail(edge_port->ep_out_buf);
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

	dbg ("%s - returns %d", __FUNCTION__, chars);
	return chars;
}

static void edge_throttle (struct usb_serial_port *port)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct tty_struct *tty;
	int status;

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

	if (edge_port == NULL)
		return;

	tty = port->tty;
	if (!tty) {
		dbg ("%s - no tty available", __FUNCTION__);
		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 (port, &stop_char, 1);
		if (status <= 0) {
			dev_err(&port->dev, "%s - failed to write stop character, %d\n", __FUNCTION__, status);
		}
	}

	/* if we are implementing RTS/CTS, stop reads */
	/* and the Edgeport will clear the RTS line */
	if (C_CRTSCTS(tty))
		stop_read(edge_port);

}

static void edge_unthrottle (struct usb_serial_port *port)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct tty_struct *tty;
	int status;

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

	if (edge_port == NULL)
		return;

	tty = port->tty;
	if (!tty) {
		dbg ("%s - no tty available", __FUNCTION__);
		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 (port, &start_char, 1);
		if (status <= 0) {
			dev_err(&port->dev, "%s - failed to write start character, %d\n", __FUNCTION__, status);
		}
	}

	/* if we are implementing RTS/CTS, restart reads */
	/* are the Edgeport will assert the RTS line */
	if (C_CRTSCTS(tty)) {
		status = restart_read(edge_port);
		if (status)
			dev_err(&port->dev, "%s - read bulk usb_submit_urb failed with value %d\n", __FUNCTION__, status);
	}

}

static void stop_read(struct edgeport_port *edge_port)
{
	unsigned long flags;

	spin_lock_irqsave(&edge_port->ep_lock, flags);

	if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
		edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
	edge_port->shadow_mcr &= ~MCR_RTS;

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

static int restart_read(struct edgeport_port *edge_port)
{
	struct urb *urb;
	int status = 0;
	unsigned long flags;

	spin_lock_irqsave(&edge_port->ep_lock, flags);

	if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
		urb = edge_port->port->read_urb;
		urb->complete = edge_bulk_in_callback;
		urb->context = edge_port;
		urb->dev = edge_port->port->serial->dev;
		status = usb_submit_urb(urb, GFP_KERNEL);
	}
	edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
	edge_port->shadow_mcr |= MCR_RTS;

	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

	return status;
}

static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios)
{
	struct ump_uart_config *config;
	struct tty_struct *tty;
	int baud;
	unsigned cflag;
	int status;
	int port_number = edge_port->port->number - edge_port->port->serial->minor;

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

	tty = edge_port->port->tty;
	if ((!tty) ||
	    (!tty->termios)) {
		dbg("%s - no tty structures", __FUNCTION__);
		return;
	}

	config = kmalloc (sizeof (*config), GFP_KERNEL);
	if (!config) {
		dev_err (&edge_port->port->dev, "%s - out of memory\n", __FUNCTION__);
		return;
	}

	cflag = tty->termios->c_cflag;

	config->wFlags = 0;

	/* These flags must be set */
	config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
	config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
	config->bUartMode = (__u8)(edge_port->bUartMode);

	switch (cflag & CSIZE) {
		case CS5:
			    config->bDataBits = UMP_UART_CHAR5BITS;
			    dbg ("%s - data bits = 5", __FUNCTION__);
			    break;
		case CS6:
			    config->bDataBits = UMP_UART_CHAR6BITS;
			    dbg ("%s - data bits = 6", __FUNCTION__);
			    break;
		case CS7:
			    config->bDataBits = UMP_UART_CHAR7BITS;
			    dbg ("%s - data bits = 7", __FUNCTION__);
			    break;
		default:
		case CS8:
			    config->bDataBits = UMP_UART_CHAR8BITS;
			    dbg ("%s - data bits = 8", __FUNCTION__);
			    break;
	}

	if (cflag & PARENB) {
		if (cflag & PARODD) {
			config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
			config->bParity = UMP_UART_ODDPARITY;
			dbg("%s - parity = odd", __FUNCTION__);
		} else {
			config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
			config->bParity = UMP_UART_EVENPARITY;
			dbg("%s - parity = even", __FUNCTION__);
		}
	} else {
		config->bParity = UMP_UART_NOPARITY; 	
		dbg("%s - parity = none", __FUNCTION__);
	}

	if (cflag & CSTOPB) {
		config->bStopBits = UMP_UART_STOPBIT2;
		dbg("%s - stop bits = 2", __FUNCTION__);
	} else {
		config->bStopBits = UMP_UART_STOPBIT1;
		dbg("%s - stop bits = 1", __FUNCTION__);
	}

	/* figure out the flow control settings */
	if (cflag & CRTSCTS) {
		config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
		config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
		dbg("%s - RTS/CTS is enabled", __FUNCTION__);
	} else {
		dbg("%s - RTS/CTS is disabled", __FUNCTION__);
		tty->hw_stopped = 0;
		restart_read(edge_port);
	}

	/* if we are implementing XON/XOFF, set the start and stop character in the device */
	if (I_IXOFF(tty) || I_IXON(tty)) {
		config->cXon  = START_CHAR(tty);
		config->cXoff = STOP_CHAR(tty);

		/* if we are implementing INBOUND XON/XOFF */
		if (I_IXOFF(tty)) {
			config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
			dbg ("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
			     __FUNCTION__, config->cXon, config->cXoff);
		} else {
			dbg ("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
		}

		/* if we are implementing OUTBOUND XON/XOFF */
		if (I_IXON(tty)) {
			config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
			dbg ("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
			     __FUNCTION__, config->cXon, config->cXoff);
		} else {
			dbg ("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
		}
	}

	/* Round the baud rate */
	baud = tty_get_baud_rate(tty);
	if (!baud) {
		/* pick a default, any default... */
		baud = 9600;
	}
	edge_port->baud_rate = baud;
	config->wBaudRate = (__u16)((461550L + baud/2) / baud);

	dbg ("%s - baud rate = %d, wBaudRate = %d", __FUNCTION__, baud, config->wBaudRate);

	dbg ("wBaudRate:   %d", (int)(461550L / config->wBaudRate));
	dbg ("wFlags:    0x%x", config->wFlags);
	dbg ("bDataBits:   %d", config->bDataBits);
	dbg ("bParity:     %d", config->bParity);
	dbg ("bStopBits:   %d", config->bStopBits);
	dbg ("cXon:        %d", config->cXon);
	dbg ("cXoff:       %d", config->cXoff);
	dbg ("bUartMode:   %d", config->bUartMode);

	/* move the word values into big endian mode */
	cpu_to_be16s (&config->wFlags);
	cpu_to_be16s (&config->wBaudRate);

	status = TIWriteCommandSync (edge_port->port->serial->dev,
				UMPC_SET_CONFIG,
				(__u8)(UMPM_UART1_PORT + port_number),
				0,
				(__u8 *)config,
				sizeof(*config));
	if (status) {
		dbg ("%s - error %d when trying to write config to device",
		     __FUNCTION__, status);
	}

	kfree (config);
	
	return;
}

static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct tty_struct *tty = port->tty;
	unsigned int cflag;

	if (!port->tty || !port->tty->termios) {
		dbg ("%s - no tty or termios", __FUNCTION__);
		return;
	}

	cflag = tty->termios->c_cflag;
	/* check that they really want us to change something */
	if (old_termios) {
		if (cflag == old_termios->c_cflag &&
		    tty->termios->c_iflag == old_termios->c_iflag) {
			dbg ("%s - nothing to change", __FUNCTION__);
			return;
		}
	}

	dbg("%s - clfag %08x iflag %08x", __FUNCTION__, 
	    tty->termios->c_cflag, tty->termios->c_iflag);
	if (old_termios) {
		dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
		    old_termios->c_cflag, old_termios->c_iflag);
	}

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

	if (edge_port == NULL)
		return;

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

	return;
}

static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	unsigned int mcr;

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

	mcr = edge_port->shadow_mcr;
	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->shadow_mcr = mcr;

	TIRestoreMCR (edge_port, mcr);

	return 0;
}

static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
{
	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", __FUNCTION__, port->number);

	msr = edge_port->shadow_msr;
	mcr = edge_port->shadow_mcr;
	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", __FUNCTION__, result);

	return result;
}

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->port->bulk_out_size;
	tmp.baud_base		= 9600;
	tmp.close_delay		= 5*HZ;
	tmp.closing_wait	= closing_wait;
//	tmp.custom_divisor	= state->custom_divisor;
//	tmp.hub6		= state->hub6;
//	tmp.io_type		= state->io_type;


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

static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
{
	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", __FUNCTION__, port->number, cmd);

	switch (cmd) {
		case TIOCINQ:
			dbg("%s - (%d) TIOCINQ", __FUNCTION__, port->number);
//			return get_number_bytes_avail(edge_port, (unsigned int *) arg);
			break;

		case TIOCSERGETLSR:
			dbg("%s - (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
//			return get_lsr_info(edge_port, (unsigned int *) arg);
			break;

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

		case TIOCSSERIAL:
			dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
			break;

		case TIOCMIWAIT:
			dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
			cprev = edge_port->icount;
			while (1) {
				interruptible_sleep_on(&edge_port->delta_msr_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;
			}
			/* not reached */
			break;

		case TIOCGICOUNT:
			dbg ("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
			     port->number, edge_port->icount.rx, edge_port->icount.tx);
			if (copy_to_user((void __user *)arg, &edge_port->icount, sizeof(edge_port->icount)))
				return -EFAULT;
			return 0;
	}

	return -ENOIOCTLCMD;
}

static void edge_break (struct usb_serial_port *port, int break_state)
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int status;

	dbg ("%s - state = %d", __FUNCTION__, break_state);

	/* chase the port close */
	TIChasePort (edge_port, 0, 0);

	if (break_state == -1) {
		status = TISetBreak (edge_port);
	} else {
		status = TIClearBreak (edge_port);
	}
	if (status) {
		dbg ("%s - error %d sending break set/clear command.",
		     __FUNCTION__, status);
	}
}

static int edge_startup (struct usb_serial *serial)
{
	struct edgeport_serial *edge_serial;
	struct edgeport_port *edge_port;
	struct usb_device *dev;
	int status;
	int i;

	dev = serial->dev;

	/* create our private serial structure */
2729
	edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
L
Linus Torvalds 已提交
2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745
	if (edge_serial == NULL) {
		dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
		return -ENOMEM;
	}
	sema_init(&edge_serial->es_sem, 1);
	edge_serial->serial = serial;
	usb_set_serial_data(serial, edge_serial);

	status = TIDownloadFirmware (edge_serial);
	if (status) {
		kfree (edge_serial);
		return status;
	}

	/* set up our port private structures */
	for (i = 0; i < serial->num_ports; ++i) {
2746
		edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
L
Linus Torvalds 已提交
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
		if (edge_port == NULL) {
			dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
			goto cleanup;
		}
		spin_lock_init(&edge_port->ep_lock);
		edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
		if (edge_port->ep_out_buf == NULL) {
			dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
			kfree(edge_port);
			goto cleanup;
		}
		edge_port->port = serial->port[i];
		edge_port->edge_serial = edge_serial;
		usb_set_serial_port_data(serial->port[i], edge_port);
		edge_port->bUartMode = 0;	/* Default is RS232 */
	}
	
	return 0;

cleanup:
	for (--i; i>=0; --i) {
		edge_port = usb_get_serial_port_data(serial->port[i]);
		edge_buf_free(edge_port->ep_out_buf);
		kfree(edge_port);
		usb_set_serial_port_data(serial->port[i], NULL);
	}
	kfree (edge_serial);
	usb_set_serial_data(serial, NULL);
	return -ENOMEM;
}

static void edge_shutdown (struct usb_serial *serial)
{
	int i;
	struct edgeport_port *edge_port;

	dbg ("%s", __FUNCTION__);

	for (i=0; i < serial->num_ports; ++i) {
		edge_port = usb_get_serial_port_data(serial->port[i]);
		if (edge_port) {
			edge_buf_free(edge_port->ep_out_buf);
			kfree(edge_port);
		}
		usb_set_serial_port_data(serial->port[i], NULL);
	}
	kfree (usb_get_serial_data(serial));
	usb_set_serial_data(serial, NULL);
}


/* Circular Buffer */

/*
 * edge_buf_alloc
 *
 * Allocate a circular buffer and all associated memory.
 */

static struct edge_buf *edge_buf_alloc(unsigned int size)
{
	struct edge_buf *eb;


	if (size == 0)
		return NULL;

	eb = (struct edge_buf *)kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
	if (eb == NULL)
		return NULL;

	eb->buf_buf = kmalloc(size, GFP_KERNEL);
	if (eb->buf_buf == NULL) {
		kfree(eb);
		return NULL;
	}

	eb->buf_size = size;
	eb->buf_get = eb->buf_put = eb->buf_buf;

	return eb;
}


/*
 * edge_buf_free
 *
 * Free the buffer and all associated memory.
 */

A
Adrian Bunk 已提交
2837
static void edge_buf_free(struct edge_buf *eb)
L
Linus Torvalds 已提交
2838
{
2839 2840
	if (eb) {
		kfree(eb->buf_buf);
L
Linus Torvalds 已提交
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
		kfree(eb);
	}
}


/*
 * edge_buf_clear
 *
 * Clear out all data in the circular buffer.
 */

static void edge_buf_clear(struct edge_buf *eb)
{
        if (eb != NULL)
                eb->buf_get = eb->buf_put;
                /* equivalent to a get of all data available */
}


/*
 * edge_buf_data_avail
 *
 * Return the number of bytes of data available in the circular
 * buffer.
 */

static unsigned int edge_buf_data_avail(struct edge_buf *eb)
{
	if (eb != NULL)
		return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
	else
		return 0;
}


/*
 * edge_buf_space_avail
 *
 * Return the number of bytes of space available in the circular
 * buffer.
 */

static unsigned int edge_buf_space_avail(struct edge_buf *eb)
{
	if (eb != NULL)
		return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
	else
		return 0;
}


/*
 * edge_buf_put
 *
 * Copy data data from a user buffer and put it into the circular buffer.
 * Restrict to the amount of space available.
 *
 * Return the number of bytes copied.
 */

static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
	unsigned int count)
{
	unsigned int len;


	if (eb == NULL)
		return 0;

	len  = edge_buf_space_avail(eb);
	if (count > len)
		count = len;

	if (count == 0)
		return 0;

	len = eb->buf_buf + eb->buf_size - eb->buf_put;
	if (count > len) {
		memcpy(eb->buf_put, buf, len);
		memcpy(eb->buf_buf, buf+len, count - len);
		eb->buf_put = eb->buf_buf + count - len;
	} else {
		memcpy(eb->buf_put, buf, count);
		if (count < len)
			eb->buf_put += count;
		else /* count == len */
			eb->buf_put = eb->buf_buf;
	}

	return count;
}


/*
 * edge_buf_get
 *
 * Get data from the circular buffer and copy to the given buffer.
 * Restrict to the amount of data available.
 *
 * Return the number of bytes copied.
 */

static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
	unsigned int count)
{
	unsigned int len;


	if (eb == NULL)
		return 0;

	len = edge_buf_data_avail(eb);
	if (count > len)
		count = len;

	if (count == 0)
		return 0;

	len = eb->buf_buf + eb->buf_size - eb->buf_get;
	if (count > len) {
		memcpy(buf, eb->buf_get, len);
		memcpy(buf+len, eb->buf_buf, count - len);
		eb->buf_get = eb->buf_buf + count - len;
	} else {
		memcpy(buf, eb->buf_get, count);
		if (count < len)
			eb->buf_get += count;
		else /* count == len */
			eb->buf_get = eb->buf_buf;
	}

	return count;
}


2976
static struct usb_serial_driver edgeport_1port_device = {
2977
	.driver = {
2978 2979
		.owner		= THIS_MODULE,
		.name		= "edgeport_ti_1",
2980
	},
2981
	.description		= "Edgeport TI 1 port adapter",
L
Linus Torvalds 已提交
2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005
	.id_table		= edgeport_1port_id_table,
	.num_interrupt_in	= 1,
	.num_bulk_in		= 1,
	.num_bulk_out		= 1,
	.num_ports		= 1,
	.open			= edge_open,
	.close			= edge_close,
	.throttle		= edge_throttle,
	.unthrottle		= edge_unthrottle,
	.attach			= edge_startup,
	.shutdown		= edge_shutdown,
	.ioctl			= edge_ioctl,
	.set_termios		= edge_set_termios,
	.tiocmget		= edge_tiocmget,
	.tiocmset		= edge_tiocmset,
	.write			= edge_write,
	.write_room		= edge_write_room,
	.chars_in_buffer	= edge_chars_in_buffer,
	.break_ctl		= edge_break,
	.read_int_callback	= edge_interrupt_callback,
	.read_bulk_callback	= edge_bulk_in_callback,
	.write_bulk_callback	= edge_bulk_out_callback,
};

3006
static struct usb_serial_driver edgeport_2port_device = {
3007
	.driver = {
3008 3009
		.owner		= THIS_MODULE,
		.name		= "edgeport_ti_2",
3010
	},
3011
	.description		= "Edgeport TI 2 port adapter",
L
Linus Torvalds 已提交
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
	.id_table		= edgeport_2port_id_table,
	.num_interrupt_in	= 1,
	.num_bulk_in		= 2,
	.num_bulk_out		= 2,
	.num_ports		= 2,
	.open			= edge_open,
	.close			= edge_close,
	.throttle		= edge_throttle,
	.unthrottle		= edge_unthrottle,
	.attach			= edge_startup,
	.shutdown		= edge_shutdown,
	.ioctl			= edge_ioctl,
	.set_termios		= edge_set_termios,
	.tiocmget		= edge_tiocmget,
	.tiocmset		= edge_tiocmset,
	.write			= edge_write,
	.write_room		= edge_write_room,
	.chars_in_buffer	= edge_chars_in_buffer,
	.break_ctl		= edge_break,
	.read_int_callback	= edge_interrupt_callback,
	.read_bulk_callback	= edge_bulk_in_callback,
	.write_bulk_callback	= edge_bulk_out_callback,
};


static int __init edgeport_init(void)
{
	int retval;
	retval = usb_serial_register(&edgeport_1port_device);
	if (retval)
		goto failed_1port_device_register;
	retval = usb_serial_register(&edgeport_2port_device);
	if (retval)
		goto failed_2port_device_register;
	retval = usb_register(&io_driver);
	if (retval) 
		goto failed_usb_register;
	info(DRIVER_DESC " " DRIVER_VERSION);
	return 0;
failed_usb_register:
	usb_serial_deregister(&edgeport_2port_device);
failed_2port_device_register:
	usb_serial_deregister(&edgeport_1port_device);
failed_1port_device_register:
	return retval;
}

static void __exit edgeport_exit (void)
{
	usb_deregister (&io_driver);
	usb_serial_deregister (&edgeport_1port_device);
	usb_serial_deregister (&edgeport_2port_device);
}

module_init(edgeport_init);
module_exit(edgeport_exit);

/* Module information */
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

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

module_param(low_latency, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(low_latency, "Low latency enabled or not");

module_param(closing_wait, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");

module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ignore_cpu_rev, "Ignore the cpu revision when connecting to a device");