cm4000_cs.c 51.4 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444
 /*
  * A driver for the PCMCIA Smartcard Reader "Omnikey CardMan Mobile 4000"
  *
  * cm4000_cs.c support.linux@omnikey.com
  *
  * Tue Oct 23 11:32:43 GMT 2001 herp - cleaned up header files
  * Sun Jan 20 10:11:15 MET 2002 herp - added modversion header files
  * Thu Nov 14 16:34:11 GMT 2002 mh   - added PPS functionality
  * Tue Nov 19 16:36:27 GMT 2002 mh   - added SUSPEND/RESUME functionailty
  * Wed Jul 28 12:55:01 CEST 2004 mh  - kernel 2.6 adjustments
  *
  * current version: 2.4.0gm4
  *
  * (C) 2000,2001,2002,2003,2004 Omnikey AG
  *
  * (C) 2005 Harald Welte <laforge@gnumonks.org>
  * 	- Adhere to Kernel CodingStyle
  * 	- Port to 2.6.13 "new" style PCMCIA
  * 	- Check for copy_{from,to}_user return values
  * 	- Use nonseekable_open()
  *
  * All rights reserved. Licensed under dual BSD/GPL license.
  */

/* #define PCMCIA_DEBUG 6 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/delay.h>
#include <asm/uaccess.h>
#include <asm/io.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>

#include <linux/cm4000_cs.h>

/* #define ATR_CSUM */

#ifdef PCMCIA_DEBUG
#define reader_to_dev(x)	(&handle_to_dev(x->link.handle))
static int pc_debug = PCMCIA_DEBUG;
module_param(pc_debug, int, 0600);
#define DEBUGP(n, rdr, x, args...) do { 				\
	if (pc_debug >= (n))						\
		dev_printk(KERN_DEBUG, reader_to_dev(rdr), "%s:" x, 	\
			   __FUNCTION__ , ## args);			\
	} while (0)
#else
#define DEBUGP(n, rdr, x, args...)
#endif
static char *version = "cm4000_cs.c v2.4.0gm5 - All bugs added by Harald Welte";

#define	T_1SEC		(HZ)
#define	T_10MSEC	msecs_to_jiffies(10)
#define	T_20MSEC	msecs_to_jiffies(20)
#define	T_40MSEC	msecs_to_jiffies(40)
#define	T_50MSEC	msecs_to_jiffies(50)
#define	T_100MSEC	msecs_to_jiffies(100)
#define	T_500MSEC	msecs_to_jiffies(500)

static void cm4000_release(dev_link_t *link);

static int major;		/* major number we get from the kernel */

/* note: the first state has to have number 0 always */

#define	M_FETCH_ATR	0
#define	M_TIMEOUT_WAIT	1
#define	M_READ_ATR_LEN	2
#define	M_READ_ATR	3
#define	M_ATR_PRESENT	4
#define	M_BAD_CARD	5
#define M_CARDOFF	6

#define	LOCK_IO			0
#define	LOCK_MONITOR		1

#define IS_AUTOPPS_ACT		 6
#define	IS_PROCBYTE_PRESENT	 7
#define	IS_INVREV		 8
#define IS_ANY_T0		 9
#define	IS_ANY_T1		10
#define	IS_ATR_PRESENT		11
#define	IS_ATR_VALID		12
#define	IS_CMM_ABSENT		13
#define	IS_BAD_LENGTH		14
#define	IS_BAD_CSUM		15
#define	IS_BAD_CARD		16

#define REG_FLAGS0(x)		(x + 0)
#define REG_FLAGS1(x)		(x + 1)
#define REG_NUM_BYTES(x)	(x + 2)
#define REG_BUF_ADDR(x)		(x + 3)
#define REG_BUF_DATA(x)		(x + 4)
#define REG_NUM_SEND(x)		(x + 5)
#define REG_BAUDRATE(x)		(x + 6)
#define REG_STOPBITS(x)		(x + 7)

struct cm4000_dev {
	dev_link_t link;		/* pcmcia link */
	dev_node_t node;		/* OS node (major,minor) */

	unsigned char atr[MAX_ATR];
	unsigned char rbuf[512];
	unsigned char sbuf[512];

	wait_queue_head_t devq;		/* when removing cardman must not be
					   zeroed! */

	wait_queue_head_t ioq;		/* if IO is locked, wait on this Q */
	wait_queue_head_t atrq;		/* wait for ATR valid */
	wait_queue_head_t readq;	/* used by write to wake blk.read */

	/* warning: do not move this fields.
	 * initialising to zero depends on it - see ZERO_DEV below.  */
	unsigned char atr_csum;
	unsigned char atr_len_retry;
	unsigned short atr_len;
	unsigned short rlen;	/* bytes avail. after write */
	unsigned short rpos;	/* latest read pos. write zeroes */
	unsigned char procbyte;	/* T=0 procedure byte */
	unsigned char mstate;	/* state of card monitor */
	unsigned char cwarn;	/* slow down warning */
	unsigned char flags0;	/* cardman IO-flags 0 */
	unsigned char flags1;	/* cardman IO-flags 1 */
	unsigned int mdelay;	/* variable monitor speeds, in jiffies */

	unsigned int baudv;	/* baud value for speed */
	unsigned char ta1;
	unsigned char proto;	/* T=0, T=1, ... */
	unsigned long flags;	/* lock+flags (MONITOR,IO,ATR) * for concurrent
				   access */

	unsigned char pts[4];

	struct timer_list timer;	/* used to keep monitor running */
	int monitor_running;
};

#define	ZERO_DEV(dev)  						\
	memset(&dev->atr_csum,0,				\
		sizeof(struct cm4000_dev) - 			\
		/*link*/ sizeof(dev_link_t) - 			\
		/*node*/ sizeof(dev_node_t) - 			\
		/*atr*/ MAX_ATR*sizeof(char) - 			\
		/*rbuf*/ 512*sizeof(char) - 			\
		/*sbuf*/ 512*sizeof(char) - 			\
		/*queue*/ 4*sizeof(wait_queue_head_t))

static dev_link_t *dev_table[CM4000_MAX_DEV];

/* This table doesn't use spaces after the comma between fields and thus
 * violates CodingStyle.  However, I don't really think wrapping it around will
 * make it any clearer to read -HW */
static unsigned char fi_di_table[10][14] = {
/*FI     00   01   02   03   04   05   06   07   08   09   10   11   12   13 */
/*DI */
/* 0 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
/* 1 */ {0x01,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x91,0x11,0x11,0x11,0x11},
/* 2 */ {0x02,0x12,0x22,0x32,0x11,0x11,0x11,0x11,0x11,0x92,0xA2,0xB2,0x11,0x11},
/* 3 */ {0x03,0x13,0x23,0x33,0x43,0x53,0x63,0x11,0x11,0x93,0xA3,0xB3,0xC3,0xD3},
/* 4 */ {0x04,0x14,0x24,0x34,0x44,0x54,0x64,0x11,0x11,0x94,0xA4,0xB4,0xC4,0xD4},
/* 5 */ {0x00,0x15,0x25,0x35,0x45,0x55,0x65,0x11,0x11,0x95,0xA5,0xB5,0xC5,0xD5},
/* 6 */ {0x06,0x16,0x26,0x36,0x46,0x56,0x66,0x11,0x11,0x96,0xA6,0xB6,0xC6,0xD6},
/* 7 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
/* 8 */ {0x08,0x11,0x28,0x38,0x48,0x58,0x68,0x11,0x11,0x98,0xA8,0xB8,0xC8,0xD8},
/* 9 */ {0x09,0x19,0x29,0x39,0x49,0x59,0x69,0x11,0x11,0x99,0xA9,0xB9,0xC9,0xD9}
};

#ifndef PCMCIA_DEBUG
#define	xoutb	outb
#define	xinb	inb
#else
static inline void xoutb(unsigned char val, unsigned short port)
{
	if (pc_debug >= 7)
		printk(KERN_DEBUG "outb(val=%.2x,port=%.4x)\n", val, port);
	outb(val, port);
}
static inline unsigned char xinb(unsigned short port)
{
	unsigned char val;

	val = inb(port);
	if (pc_debug >= 7)
		printk(KERN_DEBUG "%.2x=inb(%.4x)\n", val, port);

	return val;
}
#endif

#define	b_0000	15
#define	b_0001	14
#define	b_0010	13
#define	b_0011	12
#define	b_0100	11
#define	b_0101	10
#define	b_0110	9
#define	b_0111	8
#define	b_1000	7
#define	b_1001	6
#define	b_1010	5
#define	b_1011	4
#define	b_1100	3
#define	b_1101	2
#define	b_1110	1
#define	b_1111	0

static unsigned char irtab[16] = {
	b_0000, b_1000, b_0100, b_1100,
	b_0010, b_1010, b_0110, b_1110,
	b_0001, b_1001, b_0101, b_1101,
	b_0011, b_1011, b_0111, b_1111
};

static void str_invert_revert(unsigned char *b, int len)
{
	int i;

	for (i = 0; i < len; i++)
		b[i] = (irtab[b[i] & 0x0f] << 4) | irtab[b[i] >> 4];
}

static unsigned char invert_revert(unsigned char ch)
{
	return (irtab[ch & 0x0f] << 4) | irtab[ch >> 4];
}

#define	ATRLENCK(dev,pos) \
	if (pos>=dev->atr_len || pos>=MAX_ATR) \
		goto return_0;

static unsigned int calc_baudv(unsigned char fidi)
{
	unsigned int wcrcf, wbrcf, fi_rfu, di_rfu;

	fi_rfu = 372;
	di_rfu = 1;

	/* FI */
	switch ((fidi >> 4) & 0x0F) {
	case 0x00:
		wcrcf = 372;
		break;
	case 0x01:
		wcrcf = 372;
		break;
	case 0x02:
		wcrcf = 558;
		break;
	case 0x03:
		wcrcf = 744;
		break;
	case 0x04:
		wcrcf = 1116;
		break;
	case 0x05:
		wcrcf = 1488;
		break;
	case 0x06:
		wcrcf = 1860;
		break;
	case 0x07:
		wcrcf = fi_rfu;
		break;
	case 0x08:
		wcrcf = fi_rfu;
		break;
	case 0x09:
		wcrcf = 512;
		break;
	case 0x0A:
		wcrcf = 768;
		break;
	case 0x0B:
		wcrcf = 1024;
		break;
	case 0x0C:
		wcrcf = 1536;
		break;
	case 0x0D:
		wcrcf = 2048;
		break;
	default:
		wcrcf = fi_rfu;
		break;
	}

	/* DI */
	switch (fidi & 0x0F) {
	case 0x00:
		wbrcf = di_rfu;
		break;
	case 0x01:
		wbrcf = 1;
		break;
	case 0x02:
		wbrcf = 2;
		break;
	case 0x03:
		wbrcf = 4;
		break;
	case 0x04:
		wbrcf = 8;
		break;
	case 0x05:
		wbrcf = 16;
		break;
	case 0x06:
		wbrcf = 32;
		break;
	case 0x07:
		wbrcf = di_rfu;
		break;
	case 0x08:
		wbrcf = 12;
		break;
	case 0x09:
		wbrcf = 20;
		break;
	default:
		wbrcf = di_rfu;
		break;
	}

	return (wcrcf / wbrcf);
}

static unsigned short io_read_num_rec_bytes(ioaddr_t iobase, unsigned short *s)
{
	unsigned short tmp;

	tmp = *s = 0;
	do {
		*s = tmp;
		tmp = inb(REG_NUM_BYTES(iobase)) |
				(inb(REG_FLAGS0(iobase)) & 4 ? 0x100 : 0);
	} while (tmp != *s);

	return *s;
}

static int parse_atr(struct cm4000_dev *dev)
{
	unsigned char any_t1, any_t0;
	unsigned char ch, ifno;
	int ix, done;

	DEBUGP(3, dev, "-> parse_atr: dev->atr_len = %i\n", dev->atr_len);

	if (dev->atr_len < 3) {
		DEBUGP(5, dev, "parse_atr: atr_len < 3\n");
		return 0;
	}

	if (dev->atr[0] == 0x3f)
		set_bit(IS_INVREV, &dev->flags);
	else
		clear_bit(IS_INVREV, &dev->flags);
	ix = 1;
	ifno = 1;
	ch = dev->atr[1];
	dev->proto = 0;		/* XXX PROTO */
	any_t1 = any_t0 = done = 0;
	dev->ta1 = 0x11;	/* defaults to 9600 baud */
	do {
		if (ifno == 1 && (ch & 0x10)) {
			/* read first interface byte and TA1 is present */
			dev->ta1 = dev->atr[2];
			DEBUGP(5, dev, "Card says FiDi is 0x%.2x\n", dev->ta1);
			ifno++;
		} else if ((ifno == 2) && (ch & 0x10)) { /* TA(2) */
			dev->ta1 = 0x11;
			ifno++;
		}

		DEBUGP(5, dev, "Yi=%.2x\n", ch & 0xf0);
		ix += ((ch & 0x10) >> 4)	/* no of int.face chars */
		    +((ch & 0x20) >> 5)
		    + ((ch & 0x40) >> 6)
		    + ((ch & 0x80) >> 7);
		/* ATRLENCK(dev,ix); */
		if (ch & 0x80) {	/* TDi */
			ch = dev->atr[ix];
			if ((ch & 0x0f)) {
				any_t1 = 1;
				DEBUGP(5, dev, "card is capable of T=1\n");
			} else {
				any_t0 = 1;
				DEBUGP(5, dev, "card is capable of T=0\n");
			}
		} else
			done = 1;
	} while (!done);

	DEBUGP(5, dev, "ix=%d noHist=%d any_t1=%d\n",
	      ix, dev->atr[1] & 15, any_t1);
	if (ix + 1 + (dev->atr[1] & 0x0f) + any_t1 != dev->atr_len) {
		DEBUGP(5, dev, "length error\n");
		return 0;
	}
	if (any_t0)
		set_bit(IS_ANY_T0, &dev->flags);

	if (any_t1) {		/* compute csum */
		dev->atr_csum = 0;
#ifdef ATR_CSUM
		for (i = 1; i < dev->atr_len; i++)
			dev->atr_csum ^= dev->atr[i];
		if (dev->atr_csum) {
			set_bit(IS_BAD_CSUM, &dev->flags);
			DEBUGP(5, dev, "bad checksum\n");
			goto return_0;
		}
#endif
		if (any_t0 == 0)
			dev->proto = 1;	/* XXX PROTO */
		set_bit(IS_ANY_T1, &dev->flags);
	}

	return 1;
}

struct card_fixup {
	char atr[12];
	u_int8_t atr_len;
	u_int8_t stopbits;
};

static struct card_fixup card_fixups[] = {
	{	/* ACOS */
		.atr = { 0x3b, 0xb3, 0x11, 0x00, 0x00, 0x41, 0x01 },
		.atr_len = 7,
		.stopbits = 0x03,
	},
	{	/* Motorola */
		.atr = {0x3b, 0x76, 0x13, 0x00, 0x00, 0x80, 0x62, 0x07,
			0x41, 0x81, 0x81 },
		.atr_len = 11,
		.stopbits = 0x04,
	},
};

static void set_cardparameter(struct cm4000_dev *dev)
{
	int i;
	ioaddr_t iobase = dev->link.io.BasePort1;
	u_int8_t stopbits = 0x02; /* ISO default */

	DEBUGP(3, dev, "-> set_cardparameter\n");

	dev->flags1 = dev->flags1 | (((dev->baudv - 1) & 0x0100) >> 8);
	xoutb(dev->flags1, REG_FLAGS1(iobase));
	DEBUGP(5, dev, "flags1 = 0x%02x\n", dev->flags1);

	/* set baudrate */
	xoutb((unsigned char)((dev->baudv - 1) & 0xFF), REG_BAUDRATE(iobase));

	DEBUGP(5, dev, "baudv = %i -> write 0x%02x\n", dev->baudv,
	      ((dev->baudv - 1) & 0xFF));

	/* set stopbits */
	for (i = 0; i < ARRAY_SIZE(card_fixups); i++) {
		if (!memcmp(dev->atr, card_fixups[i].atr,
			    card_fixups[i].atr_len))
			stopbits = card_fixups[i].stopbits;
	}
	xoutb(stopbits, REG_STOPBITS(iobase));

	DEBUGP(3, dev, "<- set_cardparameter\n");
}

static int set_protocol(struct cm4000_dev *dev, struct ptsreq *ptsreq)
{

	unsigned long tmp, i;
	unsigned short num_bytes_read;
	unsigned char pts_reply[4];
	ssize_t rc;
	ioaddr_t iobase = dev->link.io.BasePort1;

	rc = 0;

	DEBUGP(3, dev, "-> set_protocol\n");
	DEBUGP(5, dev, "ptsreq->Protocol = 0x%.8x, ptsreq->Flags=0x%.8x, "
		 "ptsreq->pts1=0x%.2x, ptsreq->pts2=0x%.2x, "
		 "ptsreq->pts3=0x%.2x\n", (unsigned int)ptsreq->protocol,
		 (unsigned int)ptsreq->flags, ptsreq->pts1, ptsreq->pts2,
		 ptsreq->pts3);

	/* Fill PTS structure */
	dev->pts[0] = 0xff;
	dev->pts[1] = 0x00;
	tmp = ptsreq->protocol;
	while ((tmp = (tmp >> 1)) > 0)
		dev->pts[1]++;
	dev->proto = dev->pts[1];	/* Set new protocol */
	dev->pts[1] = (0x01 << 4) | (dev->pts[1]);

	/* Correct Fi/Di according to CM4000 Fi/Di table */
	DEBUGP(5, dev, "Ta(1) from ATR is 0x%.2x\n", dev->ta1);
	/* set Fi/Di according to ATR TA(1) */
	dev->pts[2] = fi_di_table[dev->ta1 & 0x0F][(dev->ta1 >> 4) & 0x0F];

	/* Calculate PCK character */
	dev->pts[3] = dev->pts[0] ^ dev->pts[1] ^ dev->pts[2];

	DEBUGP(5, dev, "pts0=%.2x, pts1=%.2x, pts2=%.2x, pts3=%.2x\n",
	       dev->pts[0], dev->pts[1], dev->pts[2], dev->pts[3]);

	/* check card convention */
	if (test_bit(IS_INVREV, &dev->flags))
		str_invert_revert(dev->pts, 4);

	/* reset SM */
	xoutb(0x80, REG_FLAGS0(iobase));

	/* Enable access to the message buffer */
	DEBUGP(5, dev, "Enable access to the messages buffer\n");
	dev->flags1 = 0x20	/* T_Active */
	    | (test_bit(IS_INVREV, &dev->flags) ? 0x02 : 0x00) /* inv parity */
	    | ((dev->baudv >> 8) & 0x01);	/* MSB-baud */
	xoutb(dev->flags1, REG_FLAGS1(iobase));

	DEBUGP(5, dev, "Enable message buffer -> flags1 = 0x%.2x\n",
	       dev->flags1);

	/* write challenge to the buffer */
	DEBUGP(5, dev, "Write challenge to buffer: ");
	for (i = 0; i < 4; i++) {
		xoutb(i, REG_BUF_ADDR(iobase));
		xoutb(dev->pts[i], REG_BUF_DATA(iobase));	/* buf data */
#ifdef PCMCIA_DEBUG
		if (pc_debug >= 5)
			printk("0x%.2x ", dev->pts[i]);
	}
	if (pc_debug >= 5)
		printk("\n");
#else
	}
#endif

	/* set number of bytes to write */
	DEBUGP(5, dev, "Set number of bytes to write\n");
	xoutb(0x04, REG_NUM_SEND(iobase));

	/* Trigger CARDMAN CONTROLLER */
	xoutb(0x50, REG_FLAGS0(iobase));

	/* Monitor progress */
	/* wait for xmit done */
	DEBUGP(5, dev, "Waiting for NumRecBytes getting valid\n");

	for (i = 0; i < 100; i++) {
		if (inb(REG_FLAGS0(iobase)) & 0x08) {
			DEBUGP(5, dev, "NumRecBytes is valid\n");
			break;
		}
		mdelay(10);
	}
	if (i == 100) {
		DEBUGP(5, dev, "Timeout waiting for NumRecBytes getting "
		       "valid\n");
		rc = -EIO;
		goto exit_setprotocol;
	}

	DEBUGP(5, dev, "Reading NumRecBytes\n");
	for (i = 0; i < 100; i++) {
		io_read_num_rec_bytes(iobase, &num_bytes_read);
		if (num_bytes_read >= 4) {
			DEBUGP(2, dev, "NumRecBytes = %i\n", num_bytes_read);
			break;
		}
		mdelay(10);
	}

	/* check whether it is a short PTS reply? */
	if (num_bytes_read == 3)
		i = 0;

	if (i == 100) {
		DEBUGP(5, dev, "Timeout reading num_bytes_read\n");
		rc = -EIO;
		goto exit_setprotocol;
	}

	DEBUGP(5, dev, "Reset the CARDMAN CONTROLLER\n");
	xoutb(0x80, REG_FLAGS0(iobase));

	/* Read PPS reply */
	DEBUGP(5, dev, "Read PPS reply\n");
	for (i = 0; i < num_bytes_read; i++) {
		xoutb(i, REG_BUF_ADDR(iobase));
		pts_reply[i] = inb(REG_BUF_DATA(iobase));
	}

#ifdef PCMCIA_DEBUG
	DEBUGP(2, dev, "PTSreply: ");
	for (i = 0; i < num_bytes_read; i++) {
		if (pc_debug >= 5)
			printk("0x%.2x ", pts_reply[i]);
	}
	printk("\n");
#endif	/* PCMCIA_DEBUG */

	DEBUGP(5, dev, "Clear Tactive in Flags1\n");
	xoutb(0x20, REG_FLAGS1(iobase));

	/* Compare ptsreq and ptsreply */
	if ((dev->pts[0] == pts_reply[0]) &&
	    (dev->pts[1] == pts_reply[1]) &&
	    (dev->pts[2] == pts_reply[2]) && (dev->pts[3] == pts_reply[3])) {
		/* setcardparameter according to PPS */
		dev->baudv = calc_baudv(dev->pts[2]);
		set_cardparameter(dev);
	} else if ((dev->pts[0] == pts_reply[0]) &&
		   ((dev->pts[1] & 0xef) == pts_reply[1]) &&
		   ((pts_reply[0] ^ pts_reply[1]) == pts_reply[2])) {
		/* short PTS reply, set card parameter to default values */
		dev->baudv = calc_baudv(0x11);
		set_cardparameter(dev);
	} else
		rc = -EIO;

exit_setprotocol:
	DEBUGP(3, dev, "<- set_protocol\n");
	return rc;
}

static int io_detect_cm4000(ioaddr_t iobase, struct cm4000_dev *dev)
{

	/* note: statemachine is assumed to be reset */
	if (inb(REG_FLAGS0(iobase)) & 8) {
		clear_bit(IS_ATR_VALID, &dev->flags);
		set_bit(IS_CMM_ABSENT, &dev->flags);
		return 0;	/* detect CMM = 1 -> failure */
	}
	/* xoutb(0x40, REG_FLAGS1(iobase)); detectCMM */
	xoutb(dev->flags1 | 0x40, REG_FLAGS1(iobase));
	if ((inb(REG_FLAGS0(iobase)) & 8) == 0) {
		clear_bit(IS_ATR_VALID, &dev->flags);
		set_bit(IS_CMM_ABSENT, &dev->flags);
		return 0;	/* detect CMM=0 -> failure */
	}
	/* clear detectCMM again by restoring original flags1 */
	xoutb(dev->flags1, REG_FLAGS1(iobase));
	return 1;
}

static void terminate_monitor(struct cm4000_dev *dev)
{

	/* tell the monitor to stop and wait until
	 * it terminates.
	 */
	DEBUGP(3, dev, "-> terminate_monitor\n");
	wait_event_interruptible(dev->devq,
				 test_and_set_bit(LOCK_MONITOR,
						  (void *)&dev->flags));

	/* now, LOCK_MONITOR has been set.
	 * allow a last cycle in the monitor.
	 * the monitor will indicate that it has
	 * finished by clearing this bit.
	 */
	DEBUGP(5, dev, "Now allow last cycle of monitor!\n");
	while (test_bit(LOCK_MONITOR, (void *)&dev->flags))
		msleep(25);

	DEBUGP(5, dev, "Delete timer\n");
	del_timer_sync(&dev->timer);
#ifdef PCMCIA_DEBUG
	dev->monitor_running = 0;
#endif

	DEBUGP(3, dev, "<- terminate_monitor\n");
}

/*
 * monitor the card every 50msec. as a side-effect, retrieve the
 * atr once a card is inserted. another side-effect of retrieving the
 * atr is that the card will be powered on, so there is no need to
 * power on the card explictely from the application: the driver
 * is already doing that for you.
 */

static void monitor_card(unsigned long p)
{
	struct cm4000_dev *dev = (struct cm4000_dev *) p;
	ioaddr_t iobase = dev->link.io.BasePort1;
	unsigned short s;
	struct ptsreq ptsreq;
	int i, atrc;

	DEBUGP(7, dev, "->  monitor_card\n");

	/* if someone has set the lock for us: we're done! */
	if (test_and_set_bit(LOCK_MONITOR, &dev->flags)) {
		DEBUGP(4, dev, "About to stop monitor\n");
		/* no */
		dev->rlen =
		    dev->rpos =
		    dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
		dev->mstate = M_FETCH_ATR;
		clear_bit(LOCK_MONITOR, &dev->flags);
		/* close et al. are sleeping on devq, so wake it */
		wake_up_interruptible(&dev->devq);
		DEBUGP(2, dev, "<- monitor_card (we are done now)\n");
		return;
	}

	/* try to lock io: if it is already locked, just add another timer */
	if (test_and_set_bit(LOCK_IO, (void *)&dev->flags)) {
		DEBUGP(4, dev, "Couldn't get IO lock\n");
		goto return_with_timer;
	}

	/* is a card/a reader inserted at all ? */
	dev->flags0 = xinb(REG_FLAGS0(iobase));
	DEBUGP(7, dev, "dev->flags0 = 0x%2x\n", dev->flags0);
	DEBUGP(7, dev, "smartcard present: %s\n",
	       dev->flags0 & 1 ? "yes" : "no");
	DEBUGP(7, dev, "cardman present: %s\n",
	       dev->flags0 == 0xff ? "no" : "yes");

	if ((dev->flags0 & 1) == 0	/* no smartcard inserted */
	    || dev->flags0 == 0xff) {	/* no cardman inserted */
		/* no */
		dev->rlen =
		    dev->rpos =
		    dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
		dev->mstate = M_FETCH_ATR;

		dev->flags &= 0x000000ff; /* only keep IO and MONITOR locks */

		if (dev->flags0 == 0xff) {
			DEBUGP(4, dev, "set IS_CMM_ABSENT bit\n");
			set_bit(IS_CMM_ABSENT, &dev->flags);
		} else if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
			DEBUGP(4, dev, "clear IS_CMM_ABSENT bit "
			       "(card is removed)\n");
			clear_bit(IS_CMM_ABSENT, &dev->flags);
		}

		goto release_io;
	} else if ((dev->flags0 & 1) && test_bit(IS_CMM_ABSENT, &dev->flags)) {
		/* cardman and card present but cardman was absent before
		 * (after suspend with inserted card) */
		DEBUGP(4, dev, "clear IS_CMM_ABSENT bit (card is inserted)\n");
		clear_bit(IS_CMM_ABSENT, &dev->flags);
	}

	if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
		DEBUGP(7, dev, "believe ATR is already valid (do nothing)\n");
		goto release_io;
	}

	switch (dev->mstate) {
		unsigned char flags0;
	case M_CARDOFF:
		DEBUGP(4, dev, "M_CARDOFF\n");
		flags0 = inb(REG_FLAGS0(iobase));
		if (flags0 & 0x02) {
			/* wait until Flags0 indicate power is off */
			dev->mdelay = T_10MSEC;
		} else {
			/* Flags0 indicate power off and no card inserted now;
			 * Reset CARDMAN CONTROLLER */
			xoutb(0x80, REG_FLAGS0(iobase));

			/* prepare for fetching ATR again: after card off ATR
			 * is read again automatically */
			dev->rlen =
			    dev->rpos =
			    dev->atr_csum =
			    dev->atr_len_retry = dev->cwarn = 0;
			dev->mstate = M_FETCH_ATR;

			/* minimal gap between CARDOFF and read ATR is 50msec */
			dev->mdelay = T_50MSEC;
		}
		break;
	case M_FETCH_ATR:
		DEBUGP(4, dev, "M_FETCH_ATR\n");
		xoutb(0x80, REG_FLAGS0(iobase));
		DEBUGP(4, dev, "Reset BAUDV to 9600\n");
		dev->baudv = 0x173;	/* 9600 */
		xoutb(0x02, REG_STOPBITS(iobase));	/* stopbits=2 */
		xoutb(0x73, REG_BAUDRATE(iobase));	/* baud value */
		xoutb(0x21, REG_FLAGS1(iobase));	/* T_Active=1, baud
							   value */
		/* warm start vs. power on: */
		xoutb(dev->flags0 & 2 ? 0x46 : 0x44, REG_FLAGS0(iobase));
		dev->mdelay = T_40MSEC;
		dev->mstate = M_TIMEOUT_WAIT;
		break;
	case M_TIMEOUT_WAIT:
		DEBUGP(4, dev, "M_TIMEOUT_WAIT\n");
		/* numRecBytes */
		io_read_num_rec_bytes(iobase, &dev->atr_len);
		dev->mdelay = T_10MSEC;
		dev->mstate = M_READ_ATR_LEN;
		break;
	case M_READ_ATR_LEN:
		DEBUGP(4, dev, "M_READ_ATR_LEN\n");
		/* infinite loop possible, since there is no timeout */

#define	MAX_ATR_LEN_RETRY	100

		if (dev->atr_len == io_read_num_rec_bytes(iobase, &s)) {
			if (dev->atr_len_retry++ >= MAX_ATR_LEN_RETRY) {					/* + XX msec */
				dev->mdelay = T_10MSEC;
				dev->mstate = M_READ_ATR;
			}
		} else {
			dev->atr_len = s;
			dev->atr_len_retry = 0;	/* set new timeout */
		}

		DEBUGP(4, dev, "Current ATR_LEN = %i\n", dev->atr_len);
		break;
	case M_READ_ATR:
		DEBUGP(4, dev, "M_READ_ATR\n");
		xoutb(0x80, REG_FLAGS0(iobase));	/* reset SM */
		for (i = 0; i < dev->atr_len; i++) {
			xoutb(i, REG_BUF_ADDR(iobase));
			dev->atr[i] = inb(REG_BUF_DATA(iobase));
		}
		/* Deactivate T_Active flags */
		DEBUGP(4, dev, "Deactivate T_Active flags\n");
		dev->flags1 = 0x01;
		xoutb(dev->flags1, REG_FLAGS1(iobase));

		/* atr is present (which doesnt mean it's valid) */
		set_bit(IS_ATR_PRESENT, &dev->flags);
		if (dev->atr[0] == 0x03)
			str_invert_revert(dev->atr, dev->atr_len);
		atrc = parse_atr(dev);
		if (atrc == 0) {	/* atr invalid */
			dev->mdelay = 0;
			dev->mstate = M_BAD_CARD;
		} else {
			dev->mdelay = T_50MSEC;
			dev->mstate = M_ATR_PRESENT;
			set_bit(IS_ATR_VALID, &dev->flags);
		}

		if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
			DEBUGP(4, dev, "monitor_card: ATR valid\n");
 			/* if ta1 == 0x11, no PPS necessary (default values) */
			/* do not do PPS with multi protocol cards */
			if ((test_bit(IS_AUTOPPS_ACT, &dev->flags) == 0) &&
			    (dev->ta1 != 0x11) &&
			    !(test_bit(IS_ANY_T0, &dev->flags) &&
			    test_bit(IS_ANY_T1, &dev->flags))) {
				DEBUGP(4, dev, "Perform AUTOPPS\n");
				set_bit(IS_AUTOPPS_ACT, &dev->flags);
				ptsreq.protocol = ptsreq.protocol =
				    (0x01 << dev->proto);
				ptsreq.flags = 0x01;
				ptsreq.pts1 = 0x00;
				ptsreq.pts2 = 0x00;
				ptsreq.pts3 = 0x00;
				if (set_protocol(dev, &ptsreq) == 0) {
					DEBUGP(4, dev, "AUTOPPS ret SUCC\n");
					clear_bit(IS_AUTOPPS_ACT, &dev->flags);
					wake_up_interruptible(&dev->atrq);
				} else {
					DEBUGP(4, dev, "AUTOPPS failed: "
					       "repower using defaults\n");
					/* prepare for repowering  */
					clear_bit(IS_ATR_PRESENT, &dev->flags);
					clear_bit(IS_ATR_VALID, &dev->flags);
					dev->rlen =
					    dev->rpos =
					    dev->atr_csum =
					    dev->atr_len_retry = dev->cwarn = 0;
					dev->mstate = M_FETCH_ATR;

					dev->mdelay = T_50MSEC;
				}
			} else {
				/* for cards which use slightly different
				 * params (extra guard time) */
				set_cardparameter(dev);
				if (test_bit(IS_AUTOPPS_ACT, &dev->flags) == 1)
					DEBUGP(4, dev, "AUTOPPS already active "
					       "2nd try:use default values\n");
				if (dev->ta1 == 0x11)
					DEBUGP(4, dev, "No AUTOPPS necessary "
					       "TA(1)==0x11\n");
				if (test_bit(IS_ANY_T0, &dev->flags)
				    && test_bit(IS_ANY_T1, &dev->flags))
					DEBUGP(4, dev, "Do NOT perform AUTOPPS "
					       "with multiprotocol cards\n");
				clear_bit(IS_AUTOPPS_ACT, &dev->flags);
				wake_up_interruptible(&dev->atrq);
			}
		} else {
			DEBUGP(4, dev, "ATR invalid\n");
			wake_up_interruptible(&dev->atrq);
		}
		break;
	case M_BAD_CARD:
		DEBUGP(4, dev, "M_BAD_CARD\n");
		/* slow down warning, but prompt immediately after insertion */
		if (dev->cwarn == 0 || dev->cwarn == 10) {
			set_bit(IS_BAD_CARD, &dev->flags);
			printk(KERN_WARNING MODULE_NAME ": device %s: ",
			       dev->node.dev_name);
			if (test_bit(IS_BAD_CSUM, &dev->flags)) {
				DEBUGP(4, dev, "ATR checksum (0x%.2x, should "
				       "be zero) failed\n", dev->atr_csum);
			}
#ifdef PCMCIA_DEBUG
			else if (test_bit(IS_BAD_LENGTH, &dev->flags)) {
				DEBUGP(4, dev, "ATR length error\n");
			} else {
				DEBUGP(4, dev, "card damaged or wrong way "
					"inserted\n");
			}
#endif
			dev->cwarn = 0;
			wake_up_interruptible(&dev->atrq);	/* wake open */
		}
		dev->cwarn++;
		dev->mdelay = T_100MSEC;
		dev->mstate = M_FETCH_ATR;
		break;
	default:
		DEBUGP(7, dev, "Unknown action\n");
		break;		/* nothing */
	}

release_io:
	DEBUGP(7, dev, "release_io\n");
	clear_bit(LOCK_IO, &dev->flags);
	wake_up_interruptible(&dev->ioq);	/* whoever needs IO */

return_with_timer:
	DEBUGP(7, dev, "<- monitor_card (returns with timer)\n");
	dev->timer.expires = jiffies + dev->mdelay;
	add_timer(&dev->timer);
	clear_bit(LOCK_MONITOR, &dev->flags);
}

/* Interface to userland (file_operations) */

static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
			loff_t *ppos)
{
	struct cm4000_dev *dev = filp->private_data;
	ioaddr_t iobase = dev->link.io.BasePort1;
	ssize_t rc;
	int i, j, k;

	DEBUGP(2, dev, "-> cmm_read(%s,%d)\n", current->comm, current->pid);

	if (count == 0)		/* according to manpage */
		return 0;

	if ((dev->link.state & DEV_PRESENT) == 0 ||	/* socket removed */
	    test_bit(IS_CMM_ABSENT, &dev->flags))
		return -ENODEV;

	if (test_bit(IS_BAD_CSUM, &dev->flags))
		return -EIO;

	/* also see the note about this in cmm_write */
	if (wait_event_interruptible
	    (dev->atrq,
	     ((filp->f_flags & O_NONBLOCK)
	      || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
		if (filp->f_flags & O_NONBLOCK)
			return -EAGAIN;
		return -ERESTARTSYS;
	}

	if (test_bit(IS_ATR_VALID, &dev->flags) == 0)
		return -EIO;

	/* this one implements blocking IO */
	if (wait_event_interruptible
	    (dev->readq,
	     ((filp->f_flags & O_NONBLOCK) || (dev->rpos < dev->rlen)))) {
		if (filp->f_flags & O_NONBLOCK)
			return -EAGAIN;
		return -ERESTARTSYS;
	}

	/* lock io */
	if (wait_event_interruptible
	    (dev->ioq,
	     ((filp->f_flags & O_NONBLOCK)
	      || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
		if (filp->f_flags & O_NONBLOCK)
			return -EAGAIN;
		return -ERESTARTSYS;
	}

	rc = 0;
	dev->flags0 = inb(REG_FLAGS0(iobase));
	if ((dev->flags0 & 1) == 0	/* no smartcard inserted */
	    || dev->flags0 == 0xff) {	/* no cardman inserted */
		clear_bit(IS_ATR_VALID, &dev->flags);
		if (dev->flags0 & 1) {
			set_bit(IS_CMM_ABSENT, &dev->flags);
			rc = -ENODEV;
		}
		rc = -EIO;
		goto release_io;
	}

	DEBUGP(4, dev, "begin read answer\n");
	j = min(count, (size_t)(dev->rlen - dev->rpos));
	k = dev->rpos;
	if (k + j > 255)
		j = 256 - k;
	DEBUGP(4, dev, "read1 j=%d\n", j);
	for (i = 0; i < j; i++) {
		xoutb(k++, REG_BUF_ADDR(iobase));
		dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
	}
	j = min(count, (size_t)(dev->rlen - dev->rpos));
	if (k + j > 255) {
		DEBUGP(4, dev, "read2 j=%d\n", j);
		dev->flags1 |= 0x10;	/* MSB buf addr set */
		xoutb(dev->flags1, REG_FLAGS1(iobase));
		for (; i < j; i++) {
			xoutb(k++, REG_BUF_ADDR(iobase));
			dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
		}
	}

	if (dev->proto == 0 && count > dev->rlen - dev->rpos) {
		DEBUGP(4, dev, "T=0 and count > buffer\n");
		dev->rbuf[i] = dev->rbuf[i - 1];
		dev->rbuf[i - 1] = dev->procbyte;
		j++;
	}
	count = j;

	dev->rpos = dev->rlen + 1;

	/* Clear T1Active */
	DEBUGP(4, dev, "Clear T1Active\n");
	dev->flags1 &= 0xdf;
	xoutb(dev->flags1, REG_FLAGS1(iobase));

	xoutb(0, REG_FLAGS1(iobase));	/* clear detectCMM */
	/* last check before exit */
	if (!io_detect_cm4000(iobase, dev))
		count = -ENODEV;

	if (test_bit(IS_INVREV, &dev->flags) && count > 0)
		str_invert_revert(dev->rbuf, count);

	if (copy_to_user(buf, dev->rbuf, count))
		return -EFAULT;

release_io:
	clear_bit(LOCK_IO, &dev->flags);
	wake_up_interruptible(&dev->ioq);

	DEBUGP(2, dev, "<- cmm_read returns: rc = %Zi\n",
	       (rc < 0 ? rc : count));
	return rc < 0 ? rc : count;
}

static ssize_t cmm_write(struct file *filp, const char __user *buf,
			 size_t count, loff_t *ppos)
{
	struct cm4000_dev *dev = (struct cm4000_dev *) filp->private_data;
	ioaddr_t iobase = dev->link.io.BasePort1;
	unsigned short s;
	unsigned char tmp;
	unsigned char infolen;
	unsigned char sendT0;
	unsigned short nsend;
	unsigned short nr;
	ssize_t rc;
	int i;

	DEBUGP(2, dev, "-> cmm_write(%s,%d)\n", current->comm, current->pid);

	if (count == 0)		/* according to manpage */
		return 0;

	if (dev->proto == 0 && count < 4) {
		/* T0 must have at least 4 bytes */
		DEBUGP(4, dev, "T0 short write\n");
		return -EIO;
	}

	nr = count & 0x1ff;	/* max bytes to write */

	sendT0 = dev->proto ? 0 : nr > 5 ? 0x08 : 0;

	if ((dev->link.state & DEV_PRESENT) == 0 ||	/* socket removed */
	    test_bit(IS_CMM_ABSENT, &dev->flags))
		return -ENODEV;

	if (test_bit(IS_BAD_CSUM, &dev->flags)) {
		DEBUGP(4, dev, "bad csum\n");
		return -EIO;
	}

	/*
	 * wait for atr to become valid.
	 * note: it is important to lock this code. if we dont, the monitor
	 * could be run between test_bit and the the call the sleep on the
	 * atr-queue.  if *then* the monitor detects atr valid, it will wake up
	 * any process on the atr-queue, *but* since we have been interrupted,
	 * we do not yet sleep on this queue. this would result in a missed
	 * wake_up and the calling process would sleep forever (until
	 * interrupted).  also, do *not* restore_flags before sleep_on, because
	 * this could result in the same situation!
	 */
	if (wait_event_interruptible
	    (dev->atrq,
	     ((filp->f_flags & O_NONBLOCK)
	      || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
		if (filp->f_flags & O_NONBLOCK)
			return -EAGAIN;
		return -ERESTARTSYS;
	}

	if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {	/* invalid atr */
		DEBUGP(4, dev, "invalid ATR\n");
		return -EIO;
	}

	/* lock io */
	if (wait_event_interruptible
	    (dev->ioq,
	     ((filp->f_flags & O_NONBLOCK)
	      || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
		if (filp->f_flags & O_NONBLOCK)
			return -EAGAIN;
		return -ERESTARTSYS;
	}

	if (copy_from_user(dev->sbuf, buf, ((count > 512) ? 512 : count)))
		return -EFAULT;

	rc = 0;
	dev->flags0 = inb(REG_FLAGS0(iobase));
	if ((dev->flags0 & 1) == 0	/* no smartcard inserted */
	    || dev->flags0 == 0xff) {	/* no cardman inserted */
		clear_bit(IS_ATR_VALID, &dev->flags);
		if (dev->flags0 & 1) {
			set_bit(IS_CMM_ABSENT, &dev->flags);
			rc = -ENODEV;
		} else {
			DEBUGP(4, dev, "IO error\n");
			rc = -EIO;
		}
		goto release_io;
	}

	xoutb(0x80, REG_FLAGS0(iobase));	/* reset SM  */

	if (!io_detect_cm4000(iobase, dev)) {
		rc = -ENODEV;
		goto release_io;
	}

	/* reflect T=0 send/read mode in flags1 */
	dev->flags1 |= (sendT0);

	set_cardparameter(dev);

	/* dummy read, reset flag procedure received */
	tmp = inb(REG_FLAGS1(iobase));

	dev->flags1 = 0x20	/* T_Active */
	    | (sendT0)
	    | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)/* inverse parity  */
	    | (((dev->baudv - 1) & 0x0100) >> 8);	/* MSB-Baud */
	DEBUGP(1, dev, "set dev->flags1 = 0x%.2x\n", dev->flags1);
	xoutb(dev->flags1, REG_FLAGS1(iobase));

	/* xmit data */
	DEBUGP(4, dev, "Xmit data\n");
	for (i = 0; i < nr; i++) {
		if (i >= 256) {
			dev->flags1 = 0x20	/* T_Active */
			    | (sendT0)	/* SendT0 */
				/* inverse parity: */
			    | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)
			    | (((dev->baudv - 1) & 0x0100) >> 8) /* MSB-Baud */
			    | 0x10;	/* set address high */
			DEBUGP(4, dev, "dev->flags = 0x%.2x - set address "
			       "high\n", dev->flags1);
			xoutb(dev->flags1, REG_FLAGS1(iobase));
		}
		if (test_bit(IS_INVREV, &dev->flags)) {
			DEBUGP(4, dev, "Apply inverse convention for 0x%.2x "
				"-> 0x%.2x\n", (unsigned char)dev->sbuf[i],
			      invert_revert(dev->sbuf[i]));
			xoutb(i, REG_BUF_ADDR(iobase));
			xoutb(invert_revert(dev->sbuf[i]),
			      REG_BUF_DATA(iobase));
		} else {
			xoutb(i, REG_BUF_ADDR(iobase));
			xoutb(dev->sbuf[i], REG_BUF_DATA(iobase));
		}
	}
	DEBUGP(4, dev, "Xmit done\n");

	if (dev->proto == 0) {
		/* T=0 proto: 0 byte reply  */
		if (nr == 4) {
			DEBUGP(4, dev, "T=0 assumes 0 byte reply\n");
			xoutb(i, REG_BUF_ADDR(iobase));
			if (test_bit(IS_INVREV, &dev->flags))
				xoutb(0xff, REG_BUF_DATA(iobase));
			else
				xoutb(0x00, REG_BUF_DATA(iobase));
		}

		/* numSendBytes */
		if (sendT0)
			nsend = nr;
		else {
			if (nr == 4)
				nsend = 5;
			else {
				nsend = 5 + (unsigned char)dev->sbuf[4];
				if (dev->sbuf[4] == 0)
					nsend += 0x100;
			}
		}
	} else
		nsend = nr;

	/* T0: output procedure byte */
	if (test_bit(IS_INVREV, &dev->flags)) {
		DEBUGP(4, dev, "T=0 set Procedure byte (inverse-reverse) "
		       "0x%.2x\n", invert_revert(dev->sbuf[1]));
		xoutb(invert_revert(dev->sbuf[1]), REG_NUM_BYTES(iobase));
	} else {
		DEBUGP(4, dev, "T=0 set Procedure byte 0x%.2x\n", dev->sbuf[1]);
		xoutb(dev->sbuf[1], REG_NUM_BYTES(iobase));
	}

	DEBUGP(1, dev, "set NumSendBytes = 0x%.2x\n",
	       (unsigned char)(nsend & 0xff));
	xoutb((unsigned char)(nsend & 0xff), REG_NUM_SEND(iobase));

	DEBUGP(1, dev, "Trigger CARDMAN CONTROLLER (0x%.2x)\n",
	       0x40	/* SM_Active */
	      | (dev->flags0 & 2 ? 0 : 4)	/* power on if needed */
	      |(dev->proto ? 0x10 : 0x08)	/* T=1/T=0 */
	      |(nsend & 0x100) >> 8 /* MSB numSendBytes */ );
	xoutb(0x40		/* SM_Active */
	      | (dev->flags0 & 2 ? 0 : 4)	/* power on if needed */
	      |(dev->proto ? 0x10 : 0x08)	/* T=1/T=0 */
	      |(nsend & 0x100) >> 8,	/* MSB numSendBytes */
	      REG_FLAGS0(iobase));

	/* wait for xmit done */
	if (dev->proto == 1) {
		DEBUGP(4, dev, "Wait for xmit done\n");
		for (i = 0; i < 1000; i++) {
			if (inb(REG_FLAGS0(iobase)) & 0x08)
				break;
			msleep_interruptible(10);
		}
		if (i == 1000) {
			DEBUGP(4, dev, "timeout waiting for xmit done\n");
			rc = -EIO;
			goto release_io;
		}
	}

	/* T=1: wait for infoLen */

	infolen = 0;
	if (dev->proto) {
		/* wait until infoLen is valid */
		for (i = 0; i < 6000; i++) {	/* max waiting time of 1 min */
			io_read_num_rec_bytes(iobase, &s);
			if (s >= 3) {
				infolen = inb(REG_FLAGS1(iobase));
				DEBUGP(4, dev, "infolen=%d\n", infolen);
				break;
			}
			msleep_interruptible(10);
		}
		if (i == 6000) {
			DEBUGP(4, dev, "timeout waiting for infoLen\n");
			rc = -EIO;
			goto release_io;
		}
	} else
		clear_bit(IS_PROCBYTE_PRESENT, &dev->flags);

	/* numRecBytes | bit9 of numRecytes */
	io_read_num_rec_bytes(iobase, &dev->rlen);
	for (i = 0; i < 600; i++) {	/* max waiting time of 2 sec */
		if (dev->proto) {
			if (dev->rlen >= infolen + 4)
				break;
		}
		msleep_interruptible(10);
		/* numRecBytes | bit9 of numRecytes */
		io_read_num_rec_bytes(iobase, &s);
		if (s > dev->rlen) {
			DEBUGP(1, dev, "NumRecBytes inc (reset timeout)\n");
			i = 0;	/* reset timeout */
			dev->rlen = s;
		}
		/* T=0: we are done when numRecBytes doesn't
		 *      increment any more and NoProcedureByte
		 *      is set and numRecBytes == bytes sent + 6
		 *      (header bytes + data + 1 for sw2)
		 *      except when the card replies an error
		 *      which means, no data will be sent back.
		 */
		else if (dev->proto == 0) {
			if ((inb(REG_BUF_ADDR(iobase)) & 0x80)) {
				/* no procedure byte received since last read */
				DEBUGP(1, dev, "NoProcedure byte set\n");
				/* i=0; */
			} else {
				/* procedure byte received since last read */
				DEBUGP(1, dev, "NoProcedure byte unset "
					"(reset timeout)\n");
				dev->procbyte = inb(REG_FLAGS1(iobase));
				DEBUGP(1, dev, "Read procedure byte 0x%.2x\n",
				      dev->procbyte);
				i = 0;	/* resettimeout */
			}
			if (inb(REG_FLAGS0(iobase)) & 0x08) {
				DEBUGP(1, dev, "T0Done flag (read reply)\n");
				break;
			}
		}
		if (dev->proto)
			infolen = inb(REG_FLAGS1(iobase));
	}
	if (i == 600) {
		DEBUGP(1, dev, "timeout waiting for numRecBytes\n");
		rc = -EIO;
		goto release_io;
	} else {
		if (dev->proto == 0) {
			DEBUGP(1, dev, "Wait for T0Done bit to be  set\n");
			for (i = 0; i < 1000; i++) {
				if (inb(REG_FLAGS0(iobase)) & 0x08)
					break;
				msleep_interruptible(10);
			}
			if (i == 1000) {
				DEBUGP(1, dev, "timeout waiting for T0Done\n");
				rc = -EIO;
				goto release_io;
			}

			dev->procbyte = inb(REG_FLAGS1(iobase));
			DEBUGP(4, dev, "Read procedure byte 0x%.2x\n",
			      dev->procbyte);

			io_read_num_rec_bytes(iobase, &dev->rlen);
			DEBUGP(4, dev, "Read NumRecBytes = %i\n", dev->rlen);

		}
	}
	/* T=1: read offset=zero, T=0: read offset=after challenge */
	dev->rpos = dev->proto ? 0 : nr == 4 ? 5 : nr > dev->rlen ? 5 : nr;
	DEBUGP(4, dev, "dev->rlen = %i,  dev->rpos = %i, nr = %i\n",
	      dev->rlen, dev->rpos, nr);

release_io:
	DEBUGP(4, dev, "Reset SM\n");
	xoutb(0x80, REG_FLAGS0(iobase));	/* reset SM */

	if (rc < 0) {
		DEBUGP(4, dev, "Write failed but clear T_Active\n");
		dev->flags1 &= 0xdf;
		xoutb(dev->flags1, REG_FLAGS1(iobase));
	}

	clear_bit(LOCK_IO, &dev->flags);
	wake_up_interruptible(&dev->ioq);
	wake_up_interruptible(&dev->readq);	/* tell read we have data */

	/* ITSEC E2: clear write buffer */
	memset((char *)dev->sbuf, 0, 512);

	/* return error or actually written bytes */
	DEBUGP(2, dev, "<- cmm_write\n");
	return rc < 0 ? rc : nr;
}

static void start_monitor(struct cm4000_dev *dev)
{
	DEBUGP(3, dev, "-> start_monitor\n");
	if (!dev->monitor_running) {
		DEBUGP(5, dev, "create, init and add timer\n");
		init_timer(&dev->timer);
		dev->monitor_running = 1;
		dev->timer.expires = jiffies;
		dev->timer.data = (unsigned long) dev;
		dev->timer.function = monitor_card;
		add_timer(&dev->timer);
	} else
		DEBUGP(5, dev, "monitor already running\n");
	DEBUGP(3, dev, "<- start_monitor\n");
}

static void stop_monitor(struct cm4000_dev *dev)
{
	DEBUGP(3, dev, "-> stop_monitor\n");
	if (dev->monitor_running) {
		DEBUGP(5, dev, "stopping monitor\n");
		terminate_monitor(dev);
		/* reset monitor SM */
		clear_bit(IS_ATR_VALID, &dev->flags);
		clear_bit(IS_ATR_PRESENT, &dev->flags);
	} else
		DEBUGP(5, dev, "monitor already stopped\n");
	DEBUGP(3, dev, "<- stop_monitor\n");
}

static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
		     unsigned long arg)
{
	struct cm4000_dev *dev = filp->private_data;
	ioaddr_t iobase = dev->link.io.BasePort1;
	dev_link_t *link;
	int size;
	int rc;
A
Al Viro 已提交
1445
	void __user *argp = (void __user *)arg;
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
#ifdef PCMCIA_DEBUG
	char *ioctl_names[CM_IOC_MAXNR + 1] = {
		[_IOC_NR(CM_IOCGSTATUS)] "CM_IOCGSTATUS",
		[_IOC_NR(CM_IOCGATR)] "CM_IOCGATR",
		[_IOC_NR(CM_IOCARDOFF)] "CM_IOCARDOFF",
		[_IOC_NR(CM_IOCSPTS)] "CM_IOCSPTS",
		[_IOC_NR(CM_IOSDBGLVL)] "CM4000_DBGLVL",
	};
#endif
	DEBUGP(3, dev, "cmm_ioctl(device=%d.%d) %s\n", imajor(inode),
	       iminor(inode), ioctl_names[_IOC_NR(cmd)]);

	link = dev_table[iminor(inode)];
	if (!(DEV_OK(link))) {
		DEBUGP(4, dev, "DEV_OK false\n");
		return -ENODEV;
	}

	if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
		DEBUGP(4, dev, "CMM_ABSENT flag set\n");
		return -ENODEV;
	}

	if (_IOC_TYPE(cmd) != CM_IOC_MAGIC) {
		DEBUGP(4, dev, "ioctype mismatch\n");
		return -EINVAL;
	}
	if (_IOC_NR(cmd) > CM_IOC_MAXNR) {
		DEBUGP(4, dev, "iocnr mismatch\n");
		return -EINVAL;
	}
	size = _IOC_SIZE(cmd);
	rc = 0;
	DEBUGP(4, dev, "iocdir=%.4x iocr=%.4x iocw=%.4x iocsize=%d cmd=%.4x\n",
	      _IOC_DIR(cmd), _IOC_READ, _IOC_WRITE, size, cmd);

	if (_IOC_DIR(cmd) & _IOC_READ) {
A
Al Viro 已提交
1483
		if (!access_ok(VERIFY_WRITE, argp, size))
1484 1485 1486
			return -EFAULT;
	}
	if (_IOC_DIR(cmd) & _IOC_WRITE) {
A
Al Viro 已提交
1487
		if (!access_ok(VERIFY_READ, argp, size))
1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507
			return -EFAULT;
	}

	switch (cmd) {
	case CM_IOCGSTATUS:
		DEBUGP(4, dev, " ... in CM_IOCGSTATUS\n");
		{
			int status;

			/* clear other bits, but leave inserted & powered as
			 * they are */
			status = dev->flags0 & 3;
			if (test_bit(IS_ATR_PRESENT, &dev->flags))
				status |= CM_ATR_PRESENT;
			if (test_bit(IS_ATR_VALID, &dev->flags))
				status |= CM_ATR_VALID;
			if (test_bit(IS_CMM_ABSENT, &dev->flags))
				status |= CM_NO_READER;
			if (test_bit(IS_BAD_CARD, &dev->flags))
				status |= CM_BAD_CARD;
A
Al Viro 已提交
1508
			if (copy_to_user(argp, &status, sizeof(int)))
1509 1510 1511 1512 1513 1514
				return -EFAULT;
		}
		return 0;
	case CM_IOCGATR:
		DEBUGP(4, dev, "... in CM_IOCGATR\n");
		{
A
Al Viro 已提交
1515
			struct atreq __user *atreq = argp;
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
			int tmp;
			/* allow nonblocking io and being interrupted */
			if (wait_event_interruptible
			    (dev->atrq,
			     ((filp->f_flags & O_NONBLOCK)
			      || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
				  != 0)))) {
				if (filp->f_flags & O_NONBLOCK)
					return -EAGAIN;
				return -ERESTARTSYS;
			}

			if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {
				tmp = -1;
				if (copy_to_user(&(atreq->atr_len), &tmp,
						 sizeof(int)))
					return -EFAULT;
			} else {
				if (copy_to_user(atreq->atr, dev->atr,
						 dev->atr_len))
					return -EFAULT;

				tmp = dev->atr_len;
				if (copy_to_user(&(atreq->atr_len), &tmp, sizeof(int)))
					return -EFAULT;
			}
			return 0;
		}
	case CM_IOCARDOFF:

#ifdef PCMCIA_DEBUG
		DEBUGP(4, dev, "... in CM_IOCARDOFF\n");
		if (dev->flags0 & 0x01) {
			DEBUGP(4, dev, "    Card inserted\n");
		} else {
			DEBUGP(2, dev, "    No card inserted\n");
		}
		if (dev->flags0 & 0x02) {
			DEBUGP(4, dev, "    Card powered\n");
		} else {
			DEBUGP(2, dev, "    Card not powered\n");
		}
#endif

		/* is a card inserted and powered? */
		if ((dev->flags0 & 0x01) && (dev->flags0 & 0x02)) {

			/* get IO lock */
			if (wait_event_interruptible
			    (dev->ioq,
			     ((filp->f_flags & O_NONBLOCK)
			      || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
				  == 0)))) {
				if (filp->f_flags & O_NONBLOCK)
					return -EAGAIN;
				return -ERESTARTSYS;
			}
			/* Set Flags0 = 0x42 */
			DEBUGP(4, dev, "Set Flags0=0x42 \n");
			xoutb(0x42, REG_FLAGS0(iobase));
			clear_bit(IS_ATR_PRESENT, &dev->flags);
			clear_bit(IS_ATR_VALID, &dev->flags);
			dev->mstate = M_CARDOFF;
			clear_bit(LOCK_IO, &dev->flags);
			if (wait_event_interruptible
			    (dev->atrq,
			     ((filp->f_flags & O_NONBLOCK)
			      || (test_bit(IS_ATR_VALID, (void *)&dev->flags) !=
				  0)))) {
				if (filp->f_flags & O_NONBLOCK)
					return -EAGAIN;
				return -ERESTARTSYS;
			}
		}
		/* release lock */
		clear_bit(LOCK_IO, &dev->flags);
		wake_up_interruptible(&dev->ioq);

		return 0;
	case CM_IOCSPTS:
		{
			struct ptsreq krnptsreq;

A
Al Viro 已提交
1599
			if (copy_from_user(&krnptsreq, argp,
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
					   sizeof(struct ptsreq)))
				return -EFAULT;

			rc = 0;
			DEBUGP(4, dev, "... in CM_IOCSPTS\n");
			/* wait for ATR to get valid */
			if (wait_event_interruptible
			    (dev->atrq,
			     ((filp->f_flags & O_NONBLOCK)
			      || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
				  != 0)))) {
				if (filp->f_flags & O_NONBLOCK)
					return -EAGAIN;
				return -ERESTARTSYS;
			}
			/* get IO lock */
			if (wait_event_interruptible
			    (dev->ioq,
			     ((filp->f_flags & O_NONBLOCK)
			      || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
				  == 0)))) {
				if (filp->f_flags & O_NONBLOCK)
					return -EAGAIN;
				return -ERESTARTSYS;
			}

			if ((rc = set_protocol(dev, &krnptsreq)) != 0) {
				/* auto power_on again */
				dev->mstate = M_FETCH_ATR;
				clear_bit(IS_ATR_VALID, &dev->flags);
			}
			/* release lock */
			clear_bit(LOCK_IO, &dev->flags);
			wake_up_interruptible(&dev->ioq);

		}
		return rc;
#ifdef PCMCIA_DEBUG
	case CM_IOSDBGLVL:	/* set debug log level */
		{
			int old_pc_debug = 0;

			old_pc_debug = pc_debug;
A
Al Viro 已提交
1643
			if (copy_from_user(&pc_debug, argp, sizeof(int)))
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
				return -EFAULT;

			if (old_pc_debug != pc_debug)
				DEBUGP(0, dev, "Changed debug log level "
				       "to %i\n", pc_debug);
		}
		return rc;
#endif
	default:
		DEBUGP(4, dev, "... in default (unknown IOCTL code)\n");
		return -EINVAL;
	}
}

static int cmm_open(struct inode *inode, struct file *filp)
{
	struct cm4000_dev *dev;
	dev_link_t *link;
	int rc, minor = iminor(inode);

	if (minor >= CM4000_MAX_DEV)
		return -ENODEV;

	link = dev_table[minor];
	if (link == NULL || !(DEV_OK(link)))
		return -ENODEV;

	if (link->open)
		return -EBUSY;

	dev = link->priv;
	filp->private_data = dev;

	DEBUGP(2, dev, "-> cmm_open(device=%d.%d process=%s,%d)\n",
	      imajor(inode), minor, current->comm, current->pid);

	/* init device variables, they may be "polluted" after close
	 * or, the device may never have been closed (i.e. open failed)
	 */

	ZERO_DEV(dev);

	/* opening will always block since the
	 * monitor will be started by open, which
	 * means we have to wait for ATR becoming
	 * vaild = block until valid (or card
	 * inserted)
	 */
	if (filp->f_flags & O_NONBLOCK)
		return -EAGAIN;

	dev->mdelay = T_50MSEC;

	/* start monitoring the cardstatus */
	start_monitor(dev);

	link->open = 1;		/* only one open per device */
	rc = 0;

	DEBUGP(2, dev, "<- cmm_open\n");
	return nonseekable_open(inode, filp);
}

static int cmm_close(struct inode *inode, struct file *filp)
{
	struct cm4000_dev *dev;
	dev_link_t *link;
	int minor = iminor(inode);

	if (minor >= CM4000_MAX_DEV)
		return -ENODEV;

	link = dev_table[minor];
	if (link == NULL)
		return -ENODEV;

	dev = link->priv;

	DEBUGP(2, dev, "-> cmm_close(maj/min=%d.%d)\n",
	       imajor(inode), minor);

	stop_monitor(dev);

	ZERO_DEV(dev);

	link->open = 0;		/* only one open per device */
	wake_up(&dev->devq);	/* socket removed? */

	DEBUGP(2, dev, "cmm_close\n");
	return 0;
}

static void cmm_cm4000_release(dev_link_t * link)
{
	struct cm4000_dev *dev = link->priv;

	/* dont terminate the monitor, rather rely on
	 * close doing that for us.
	 */
	DEBUGP(3, dev, "-> cmm_cm4000_release\n");
	while (link->open) {
		printk(KERN_INFO MODULE_NAME ": delaying release until "
		       "process has terminated\n");
		/* note: don't interrupt us:
		 * close the applications which own
		 * the devices _first_ !
		 */
		wait_event(dev->devq, (link->open == 0));
	}
	/* dev->devq=NULL;	this cannot be zeroed earlier */
	DEBUGP(3, dev, "<- cmm_cm4000_release\n");
	return;
}

/*==== Interface to PCMCIA Layer =======================================*/

static void cm4000_config(dev_link_t * link, int devno)
{
	client_handle_t handle = link->handle;
	struct cm4000_dev *dev;
	tuple_t tuple;
	cisparse_t parse;
	config_info_t conf;
	u_char buf[64];
	int fail_fn, fail_rc;
	int rc;

	/* read the config-tuples */
	tuple.DesiredTuple = CISTPL_CONFIG;
	tuple.Attributes = 0;
	tuple.TupleData = buf;
	tuple.TupleDataMax = sizeof(buf);
	tuple.TupleOffset = 0;

	if ((fail_rc = pcmcia_get_first_tuple(handle, &tuple)) != CS_SUCCESS) {
		fail_fn = GetFirstTuple;
		goto cs_failed;
	}
	if ((fail_rc = pcmcia_get_tuple_data(handle, &tuple)) != CS_SUCCESS) {
		fail_fn = GetTupleData;
		goto cs_failed;
	}
	if ((fail_rc =
	     pcmcia_parse_tuple(handle, &tuple, &parse)) != CS_SUCCESS) {
		fail_fn = ParseTuple;
		goto cs_failed;
	}
	if ((fail_rc =
	     pcmcia_get_configuration_info(handle, &conf)) != CS_SUCCESS) {
		fail_fn = GetConfigurationInfo;
		goto cs_failed;
	}

	link->state |= DEV_CONFIG;
	link->conf.ConfigBase = parse.config.base;
	link->conf.Present = parse.config.rmask[0];
	link->conf.Vcc = conf.Vcc;

	link->io.BasePort2 = 0;
	link->io.NumPorts2 = 0;
	link->io.Attributes2 = 0;
	tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
	for (rc = pcmcia_get_first_tuple(handle, &tuple);
	     rc == CS_SUCCESS; rc = pcmcia_get_next_tuple(handle, &tuple)) {

		rc = pcmcia_get_tuple_data(handle, &tuple);
		if (rc != CS_SUCCESS)
			continue;
		rc = pcmcia_parse_tuple(handle, &tuple, &parse);
		if (rc != CS_SUCCESS)
			continue;

		link->conf.ConfigIndex = parse.cftable_entry.index;

		if (!parse.cftable_entry.io.nwin)
			continue;

		/* Get the IOaddr */
		link->io.BasePort1 = parse.cftable_entry.io.win[0].base;
		link->io.NumPorts1 = parse.cftable_entry.io.win[0].len;
		link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
		if (!(parse.cftable_entry.io.flags & CISTPL_IO_8BIT))
			link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
		if (!(parse.cftable_entry.io.flags & CISTPL_IO_16BIT))
			link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
		link->io.IOAddrLines = parse.cftable_entry.io.flags
		    & CISTPL_IO_LINES_MASK;

		rc = pcmcia_request_io(handle, &link->io);
		if (rc == CS_SUCCESS)
			break;	/* we are done */
	}
	if (rc != CS_SUCCESS)
		goto cs_release;

	link->conf.IntType = 00000002;

	if ((fail_rc =
	     pcmcia_request_configuration(handle, &link->conf)) != CS_SUCCESS) {
		fail_fn = RequestConfiguration;
		goto cs_release;
	}

	dev = link->priv;
	sprintf(dev->node.dev_name, DEVICE_NAME "%d", devno);
	dev->node.major = major;
	dev->node.minor = devno;
	dev->node.next = NULL;
	link->dev = &dev->node;
	link->state &= ~DEV_CONFIG_PENDING;

	return;

cs_failed:
	cs_error(handle, fail_fn, fail_rc);
cs_release:
	cm4000_release(link);

	link->state &= ~DEV_CONFIG_PENDING;
}

1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896
static int cm4000_suspend(struct pcmcia_device *p_dev)
{
	dev_link_t *link = dev_to_instance(p_dev);
	struct cm4000_dev *dev;

	dev = link->priv;

	link->state |= DEV_SUSPEND;
	if (link->state & DEV_CONFIG)
		pcmcia_release_configuration(link->handle);
	stop_monitor(dev);

	return 0;
}

static int cm4000_resume(struct pcmcia_device *p_dev)
{
	dev_link_t *link = dev_to_instance(p_dev);
	struct cm4000_dev *dev;

	dev = link->priv;

	link->state &= ~DEV_SUSPEND;
	if (link->state & DEV_CONFIG)
		pcmcia_request_configuration(link->handle, &link->conf);

	if (link->open)
		start_monitor(dev);

	return 0;
}

1897 1898 1899 1900 1901 1902 1903
static void cm4000_release(dev_link_t *link)
{
	cmm_cm4000_release(link->priv);	/* delay release until device closed */
	pcmcia_release_configuration(link->handle);
	pcmcia_release_io(link->handle, &link->io);
}

1904
static int cm4000_attach(struct pcmcia_device *p_dev)
1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915
{
	struct cm4000_dev *dev;
	dev_link_t *link;
	int i;

	for (i = 0; i < CM4000_MAX_DEV; i++)
		if (dev_table[i] == NULL)
			break;

	if (i == CM4000_MAX_DEV) {
		printk(KERN_NOTICE MODULE_NAME ": all devices in use\n");
1916
		return -ENODEV;
1917 1918 1919 1920 1921
	}

	/* create a new cm4000_cs device */
	dev = kzalloc(sizeof(struct cm4000_dev), GFP_KERNEL);
	if (dev == NULL)
1922
		return -ENOMEM;
1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933

	link = &dev->link;
	link->priv = dev;
	link->conf.IntType = INT_MEMORY_AND_IO;
	dev_table[i] = link;

	init_waitqueue_head(&dev->devq);
	init_waitqueue_head(&dev->ioq);
	init_waitqueue_head(&dev->atrq);
	init_waitqueue_head(&dev->readq);

1934 1935 1936 1937 1938 1939 1940
	link->handle = p_dev;
	p_dev->instance = link;

	link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
	cm4000_config(link, i);

	return 0;
1941 1942
}

1943
static void cm4000_detach(struct pcmcia_device *p_dev)
1944
{
1945
	dev_link_t *link = dev_to_instance(p_dev);
1946
	struct cm4000_dev *dev = link->priv;
1947
	int devno;
1948

1949 1950 1951 1952 1953 1954
	/* find device */
	for (devno = 0; devno < CM4000_MAX_DEV; devno++)
		if (dev_table[devno] == link)
			break;
	if (devno == CM4000_MAX_DEV)
		return;
1955

1956 1957
	link->state &= ~DEV_PRESENT;
	stop_monitor(dev);
1958

1959 1960
	if (link->state & DEV_CONFIG)
 		cm4000_release(link);
1961 1962

	dev_table[devno] = NULL;
1963
 	kfree(dev);
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

	return;
}

static struct file_operations cm4000_fops = {
	.owner	= THIS_MODULE,
	.read	= cmm_read,
	.write	= cmm_write,
	.ioctl	= cmm_ioctl,
	.open	= cmm_open,
	.release= cmm_close,
};

static struct pcmcia_device_id cm4000_ids[] = {
	PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0002),
	PCMCIA_DEVICE_PROD_ID12("CardMan", "4000", 0x2FB368CA, 0xA2BD8C39),
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, cm4000_ids);

static struct pcmcia_driver cm4000_driver = {
	.owner	  = THIS_MODULE,
	.drv	  = {
		.name = "cm4000_cs",
		},
1989
	.probe    = cm4000_attach,
1990
	.remove   = cm4000_detach,
1991 1992
	.suspend  = cm4000_suspend,
	.resume   = cm4000_resume,
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
	.id_table = cm4000_ids,
};

static int __init cmm_init(void)
{
	printk(KERN_INFO "%s\n", version);
	pcmcia_register_driver(&cm4000_driver);
	major = register_chrdev(0, DEVICE_NAME, &cm4000_fops);
	if (major < 0) {
		printk(KERN_WARNING MODULE_NAME
			": could not get major number\n");
		return -1;
	}

	return 0;
}

static void __exit cmm_exit(void)
{
	printk(KERN_INFO MODULE_NAME ": unloading\n");
	pcmcia_unregister_driver(&cm4000_driver);
	unregister_chrdev(major, DEVICE_NAME);
};

module_init(cmm_init);
module_exit(cmm_exit);
MODULE_LICENSE("Dual BSD/GPL");