drivers/char/pcmcia/cm4000_cs.c

   1  /*
   2   * A driver for the PCMCIA Smartcard Reader "Omnikey CardMan Mobile 4000"
   3   *
   4   * cm4000_cs.c support.linux@omnikey.com
   5   *
   6   * Tue Oct 23 11:32:43 GMT 2001 herp - cleaned up header files
   7   * Sun Jan 20 10:11:15 MET 2002 herp - added modversion header files
   8   * Thu Nov 14 16:34:11 GMT 2002 mh   - added PPS functionality
   9   * Tue Nov 19 16:36:27 GMT 2002 mh   - added SUSPEND/RESUME functionailty
  10   * Wed Jul 28 12:55:01 CEST 2004 mh  - kernel 2.6 adjustments
  11   *
  12   * current version: 2.4.0gm4
  13   *
  14   * (C) 2000,2001,2002,2003,2004 Omnikey AG
  15   *
  16   * (C) 2005-2006 Harald Welte <laforge@gnumonks.org>
  17   *     - Adhere to Kernel process/coding-style.rst
  18   *     - Port to 2.6.13 "new" style PCMCIA
  19   *     - Check for copy_{from,to}_user return values
  20   *     - Use nonseekable_open()
  21   *     - add class interface for udev device creation
  22   *
  23   * All rights reserved. Licensed under dual BSD/GPL license.
  24   */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28 #include <linux/slab.h>
  29 #include <linux/init.h>
  30 #include <linux/fs.h>
  31 #include <linux/delay.h>
  32 #include <linux/bitrev.h>
  33 #include <linux/mutex.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/io.h>
  36
  37 #include <pcmcia/cistpl.h>
  38 #include <pcmcia/cisreg.h>
  39 #include <pcmcia/ciscode.h>
  40 #include <pcmcia/ds.h>
  41
  42 #include <linux/cm4000_cs.h>
  43
  44 /* #define ATR_CSUM */
  45
  46 #define reader_to_dev(x)        (&x->p_dev->dev)
  47
  48 /* n (debug level) is ignored */
  49 /* additional debug output may be enabled by re-compiling with
  50  * CM4000_DEBUG set */
  51 /* #define CM4000_DEBUG */
  52 #define DEBUGP(n, rdr, x, args...) do {                 \
  53                 dev_dbg(reader_to_dev(rdr), "%s:" x,    \
  54                            __func__ , ## args);         \
  55         } while (0)
  56
  57 static DEFINE_MUTEX(cmm_mutex);
  58
  59 #define T_1SEC          (HZ)
  60 #define T_10MSEC        msecs_to_jiffies(10)
  61 #define T_20MSEC        msecs_to_jiffies(20)
  62 #define T_40MSEC        msecs_to_jiffies(40)
  63 #define T_50MSEC        msecs_to_jiffies(50)
  64 #define T_100MSEC       msecs_to_jiffies(100)
  65 #define T_500MSEC       msecs_to_jiffies(500)
  66
  67 static void cm4000_release(struct pcmcia_device *link);
  68
  69 static int major;               /* major number we get from the kernel */
  70
  71 /* note: the first state has to have number 0 always */
  72
  73 #define M_FETCH_ATR     0
  74 #define M_TIMEOUT_WAIT  1
  75 #define M_READ_ATR_LEN  2
  76 #define M_READ_ATR      3
  77 #define M_ATR_PRESENT   4
  78 #define M_BAD_CARD      5
  79 #define M_CARDOFF       6
  80
  81 #define LOCK_IO                 0
  82 #define LOCK_MONITOR            1
  83
  84 #define IS_AUTOPPS_ACT           6
  85 #define IS_PROCBYTE_PRESENT      7
  86 #define IS_INVREV                8
  87 #define IS_ANY_T0                9
  88 #define IS_ANY_T1               10
  89 #define IS_ATR_PRESENT          11
  90 #define IS_ATR_VALID            12
  91 #define IS_CMM_ABSENT           13
  92 #define IS_BAD_LENGTH           14
  93 #define IS_BAD_CSUM             15
  94 #define IS_BAD_CARD             16
  95
  96 #define REG_FLAGS0(x)           (x + 0)
  97 #define REG_FLAGS1(x)           (x + 1)
  98 #define REG_NUM_BYTES(x)        (x + 2)
  99 #define REG_BUF_ADDR(x)         (x + 3)
 100 #define REG_BUF_DATA(x)         (x + 4)
 101 #define REG_NUM_SEND(x)         (x + 5)
 102 #define REG_BAUDRATE(x)         (x + 6)
 103 #define REG_STOPBITS(x)         (x + 7)
 104
 105 struct cm4000_dev {
 106         struct pcmcia_device *p_dev;
 107
 108         unsigned char atr[MAX_ATR];
 109         unsigned char rbuf[512];
 110         unsigned char sbuf[512];
 111
 112         wait_queue_head_t devq;         /* when removing cardman must not be
 113                                            zeroed! */
 114
 115         wait_queue_head_t ioq;          /* if IO is locked, wait on this Q */
 116         wait_queue_head_t atrq;         /* wait for ATR valid */
 117         wait_queue_head_t readq;        /* used by write to wake blk.read */
 118
 119         /* warning: do not move this struct group.
 120          * initialising to zero depends on it - see ZERO_DEV below.  */
 121         struct_group(init,
 122         unsigned char atr_csum;
 123         unsigned char atr_len_retry;
 124         unsigned short atr_len;
 125         unsigned short rlen;    /* bytes avail. after write */
 126         unsigned short rpos;    /* latest read pos. write zeroes */
 127         unsigned char procbyte; /* T=0 procedure byte */
 128         unsigned char mstate;   /* state of card monitor */
 129         unsigned char cwarn;    /* slow down warning */
 130         unsigned char flags0;   /* cardman IO-flags 0 */
 131         unsigned char flags1;   /* cardman IO-flags 1 */
 132         unsigned int mdelay;    /* variable monitor speeds, in jiffies */
 133
 134         unsigned int baudv;     /* baud value for speed */
 135         unsigned char ta1;
 136         unsigned char proto;    /* T=0, T=1, ... */
 137         unsigned long flags;    /* lock+flags (MONITOR,IO,ATR) * for concurrent
 138                                    access */
 139
 140         unsigned char pts[4];
 141
 142         struct timer_list timer;        /* used to keep monitor running */
 143         int monitor_running;
 144         );
 145 };
 146
 147 #define ZERO_DEV(dev)   memset(&((dev)->init), 0, sizeof((dev)->init))
 148
 149 static struct pcmcia_device *dev_table[CM4000_MAX_DEV];
 150 static struct class *cmm_class;
 151
 152 /* This table doesn't use spaces after the comma between fields and thus
 153  * violates process/coding-style.rst.  However, I don't really think wrapping it around will
 154  * make it any clearer to read -HW */
 155 static unsigned char fi_di_table[10][14] = {
 156 /*FI     00   01   02   03   04   05   06   07   08   09   10   11   12   13 */
 157 /*DI */
 158 /* 0 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
 159 /* 1 */ {0x01,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x91,0x11,0x11,0x11,0x11},
 160 /* 2 */ {0x02,0x12,0x22,0x32,0x11,0x11,0x11,0x11,0x11,0x92,0xA2,0xB2,0x11,0x11},
 161 /* 3 */ {0x03,0x13,0x23,0x33,0x43,0x53,0x63,0x11,0x11,0x93,0xA3,0xB3,0xC3,0xD3},
 162 /* 4 */ {0x04,0x14,0x24,0x34,0x44,0x54,0x64,0x11,0x11,0x94,0xA4,0xB4,0xC4,0xD4},
 163 /* 5 */ {0x00,0x15,0x25,0x35,0x45,0x55,0x65,0x11,0x11,0x95,0xA5,0xB5,0xC5,0xD5},
 164 /* 6 */ {0x06,0x16,0x26,0x36,0x46,0x56,0x66,0x11,0x11,0x96,0xA6,0xB6,0xC6,0xD6},
 165 /* 7 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
 166 /* 8 */ {0x08,0x11,0x28,0x38,0x48,0x58,0x68,0x11,0x11,0x98,0xA8,0xB8,0xC8,0xD8},
 167 /* 9 */ {0x09,0x19,0x29,0x39,0x49,0x59,0x69,0x11,0x11,0x99,0xA9,0xB9,0xC9,0xD9}
 168 };
 169
 170 #ifndef CM4000_DEBUG
 171 #define xoutb   outb
 172 #define xinb    inb
 173 #else
 174 static inline void xoutb(unsigned char val, unsigned short port)
 175 {
 176         pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
 177         outb(val, port);
 178 }
 179 static inline unsigned char xinb(unsigned short port)
 180 {
 181         unsigned char val;
 182
 183         val = inb(port);
 184         pr_debug("%.2x=inb(%.4x)\n", val, port);
 185
 186         return val;
 187 }
 188 #endif
 189
 190 static inline unsigned char invert_revert(unsigned char ch)
 191 {
 192         return bitrev8(~ch);
 193 }
 194
 195 static void str_invert_revert(unsigned char *b, int len)
 196 {
 197         int i;
 198
 199         for (i = 0; i < len; i++)
 200                 b[i] = invert_revert(b[i]);
 201 }
 202
 203 #define ATRLENCK(dev,pos) \
 204         if (pos>=dev->atr_len || pos>=MAX_ATR) \
 205                 goto return_0;
 206
 207 static unsigned int calc_baudv(unsigned char fidi)
 208 {
 209         unsigned int wcrcf, wbrcf, fi_rfu, di_rfu;
 210
 211         fi_rfu = 372;
 212         di_rfu = 1;
 213
 214         /* FI */
 215         switch ((fidi >> 4) & 0x0F) {
 216         case 0x00:
 217                 wcrcf = 372;
 218                 break;
 219         case 0x01:
 220                 wcrcf = 372;
 221                 break;
 222         case 0x02:
 223                 wcrcf = 558;
 224                 break;
 225         case 0x03:
 226                 wcrcf = 744;
 227                 break;
 228         case 0x04:
 229                 wcrcf = 1116;
 230                 break;
 231         case 0x05:
 232                 wcrcf = 1488;
 233                 break;
 234         case 0x06:
 235                 wcrcf = 1860;
 236                 break;
 237         case 0x07:
 238                 wcrcf = fi_rfu;
 239                 break;
 240         case 0x08:
 241                 wcrcf = fi_rfu;
 242                 break;
 243         case 0x09:
 244                 wcrcf = 512;
 245                 break;
 246         case 0x0A:
 247                 wcrcf = 768;
 248                 break;
 249         case 0x0B:
 250                 wcrcf = 1024;
 251                 break;
 252         case 0x0C:
 253                 wcrcf = 1536;
 254                 break;
 255         case 0x0D:
 256                 wcrcf = 2048;
 257                 break;
 258         default:
 259                 wcrcf = fi_rfu;
 260                 break;
 261         }
 262
 263         /* DI */
 264         switch (fidi & 0x0F) {
 265         case 0x00:
 266                 wbrcf = di_rfu;
 267                 break;
 268         case 0x01:
 269                 wbrcf = 1;
 270                 break;
 271         case 0x02:
 272                 wbrcf = 2;
 273                 break;
 274         case 0x03:
 275                 wbrcf = 4;
 276                 break;
 277         case 0x04:
 278                 wbrcf = 8;
 279                 break;
 280         case 0x05:
 281                 wbrcf = 16;
 282                 break;
 283         case 0x06:
 284                 wbrcf = 32;
 285                 break;
 286         case 0x07:
 287                 wbrcf = di_rfu;
 288                 break;
 289         case 0x08:
 290                 wbrcf = 12;
 291                 break;
 292         case 0x09:
 293                 wbrcf = 20;
 294                 break;
 295         default:
 296                 wbrcf = di_rfu;
 297                 break;
 298         }
 299
 300         return (wcrcf / wbrcf);
 301 }
 302
 303 static unsigned short io_read_num_rec_bytes(unsigned int iobase,
 304                                             unsigned short *s)
 305 {
 306         unsigned short tmp;
 307
 308         tmp = *s = 0;
 309         do {
 310                 *s = tmp;
 311                 tmp = inb(REG_NUM_BYTES(iobase)) |
 312                                 (inb(REG_FLAGS0(iobase)) & 4 ? 0x100 : 0);
 313         } while (tmp != *s);
 314
 315         return *s;
 316 }
 317
 318 static int parse_atr(struct cm4000_dev *dev)
 319 {
 320         unsigned char any_t1, any_t0;
 321         unsigned char ch, ifno;
 322         int ix, done;
 323
 324         DEBUGP(3, dev, "-> parse_atr: dev->atr_len = %i\n", dev->atr_len);
 325
 326         if (dev->atr_len < 3) {
 327                 DEBUGP(5, dev, "parse_atr: atr_len < 3\n");
 328                 return 0;
 329         }
 330
 331         if (dev->atr[0] == 0x3f)
 332                 set_bit(IS_INVREV, &dev->flags);
 333         else
 334                 clear_bit(IS_INVREV, &dev->flags);
 335         ix = 1;
 336         ifno = 1;
 337         ch = dev->atr[1];
 338         dev->proto = 0;         /* XXX PROTO */
 339         any_t1 = any_t0 = done = 0;
 340         dev->ta1 = 0x11;        /* defaults to 9600 baud */
 341         do {
 342                 if (ifno == 1 && (ch & 0x10)) {
 343                         /* read first interface byte and TA1 is present */
 344                         dev->ta1 = dev->atr[2];
 345                         DEBUGP(5, dev, "Card says FiDi is 0x%.2x\n", dev->ta1);
 346                         ifno++;
 347                 } else if ((ifno == 2) && (ch & 0x10)) { /* TA(2) */
 348                         dev->ta1 = 0x11;
 349                         ifno++;
 350                 }
 351
 352                 DEBUGP(5, dev, "Yi=%.2x\n", ch & 0xf0);
 353                 ix += ((ch & 0x10) >> 4)        /* no of int.face chars */
 354                     +((ch & 0x20) >> 5)
 355                     + ((ch & 0x40) >> 6)
 356                     + ((ch & 0x80) >> 7);
 357                 /* ATRLENCK(dev,ix); */
 358                 if (ch & 0x80) {        /* TDi */
 359                         ch = dev->atr[ix];
 360                         if ((ch & 0x0f)) {
 361                                 any_t1 = 1;
 362                                 DEBUGP(5, dev, "card is capable of T=1\n");
 363                         } else {
 364                                 any_t0 = 1;
 365                                 DEBUGP(5, dev, "card is capable of T=0\n");
 366                         }
 367                 } else
 368                         done = 1;
 369         } while (!done);
 370
 371         DEBUGP(5, dev, "ix=%d noHist=%d any_t1=%d\n",
 372               ix, dev->atr[1] & 15, any_t1);
 373         if (ix + 1 + (dev->atr[1] & 0x0f) + any_t1 != dev->atr_len) {
 374                 DEBUGP(5, dev, "length error\n");
 375                 return 0;
 376         }
 377         if (any_t0)
 378                 set_bit(IS_ANY_T0, &dev->flags);
 379
 380         if (any_t1) {           /* compute csum */
 381                 dev->atr_csum = 0;
 382 #ifdef ATR_CSUM
 383                 for (i = 1; i < dev->atr_len; i++)
 384                         dev->atr_csum ^= dev->atr[i];
 385                 if (dev->atr_csum) {
 386                         set_bit(IS_BAD_CSUM, &dev->flags);
 387                         DEBUGP(5, dev, "bad checksum\n");
 388                         goto return_0;
 389                 }
 390 #endif
 391                 if (any_t0 == 0)
 392                         dev->proto = 1; /* XXX PROTO */
 393                 set_bit(IS_ANY_T1, &dev->flags);
 394         }
 395
 396         return 1;
 397 }
 398
 399 struct card_fixup {
 400         char atr[12];
 401         u_int8_t atr_len;
 402         u_int8_t stopbits;
 403 };
 404
 405 static struct card_fixup card_fixups[] = {
 406         {       /* ACOS */
 407                 .atr = { 0x3b, 0xb3, 0x11, 0x00, 0x00, 0x41, 0x01 },
 408                 .atr_len = 7,
 409                 .stopbits = 0x03,
 410         },
 411         {       /* Motorola */
 412                 .atr = {0x3b, 0x76, 0x13, 0x00, 0x00, 0x80, 0x62, 0x07,
 413                         0x41, 0x81, 0x81 },
 414                 .atr_len = 11,
 415                 .stopbits = 0x04,
 416         },
 417 };
 418
 419 static void set_cardparameter(struct cm4000_dev *dev)
 420 {
 421         int i;
 422         unsigned int iobase = dev->p_dev->resource[0]->start;
 423         u_int8_t stopbits = 0x02; /* ISO default */
 424
 425         DEBUGP(3, dev, "-> set_cardparameter\n");
 426
 427         dev->flags1 = dev->flags1 | (((dev->baudv - 1) & 0x0100) >> 8);
 428         xoutb(dev->flags1, REG_FLAGS1(iobase));
 429         DEBUGP(5, dev, "flags1 = 0x%02x\n", dev->flags1);
 430
 431         /* set baudrate */
 432         xoutb((unsigned char)((dev->baudv - 1) & 0xFF), REG_BAUDRATE(iobase));
 433
 434         DEBUGP(5, dev, "baudv = %i -> write 0x%02x\n", dev->baudv,
 435               ((dev->baudv - 1) & 0xFF));
 436
 437         /* set stopbits */
 438         for (i = 0; i < ARRAY_SIZE(card_fixups); i++) {
 439                 if (!memcmp(dev->atr, card_fixups[i].atr,
 440                             card_fixups[i].atr_len))
 441                         stopbits = card_fixups[i].stopbits;
 442         }
 443         xoutb(stopbits, REG_STOPBITS(iobase));
 444
 445         DEBUGP(3, dev, "<- set_cardparameter\n");
 446 }
 447
 448 static int set_protocol(struct cm4000_dev *dev, struct ptsreq *ptsreq)
 449 {
 450
 451         unsigned long tmp, i;
 452         unsigned short num_bytes_read;
 453         unsigned char pts_reply[4];
 454         ssize_t rc;
 455         unsigned int iobase = dev->p_dev->resource[0]->start;
 456
 457         rc = 0;
 458
 459         DEBUGP(3, dev, "-> set_protocol\n");
 460         DEBUGP(5, dev, "ptsreq->Protocol = 0x%.8x, ptsreq->Flags=0x%.8x, "
 461                  "ptsreq->pts1=0x%.2x, ptsreq->pts2=0x%.2x, "
 462                  "ptsreq->pts3=0x%.2x\n", (unsigned int)ptsreq->protocol,
 463                  (unsigned int)ptsreq->flags, ptsreq->pts1, ptsreq->pts2,
 464                  ptsreq->pts3);
 465
 466         /* Fill PTS structure */
 467         dev->pts[0] = 0xff;
 468         dev->pts[1] = 0x00;
 469         tmp = ptsreq->protocol;
 470         while ((tmp = (tmp >> 1)) > 0)
 471                 dev->pts[1]++;
 472         dev->proto = dev->pts[1];       /* Set new protocol */
 473         dev->pts[1] = (0x01 << 4) | (dev->pts[1]);
 474
 475         /* Correct Fi/Di according to CM4000 Fi/Di table */
 476         DEBUGP(5, dev, "Ta(1) from ATR is 0x%.2x\n", dev->ta1);
 477         /* set Fi/Di according to ATR TA(1) */
 478         dev->pts[2] = fi_di_table[dev->ta1 & 0x0F][(dev->ta1 >> 4) & 0x0F];
 479
 480         /* Calculate PCK character */
 481         dev->pts[3] = dev->pts[0] ^ dev->pts[1] ^ dev->pts[2];
 482
 483         DEBUGP(5, dev, "pts0=%.2x, pts1=%.2x, pts2=%.2x, pts3=%.2x\n",
 484                dev->pts[0], dev->pts[1], dev->pts[2], dev->pts[3]);
 485
 486         /* check card convention */
 487         if (test_bit(IS_INVREV, &dev->flags))
 488                 str_invert_revert(dev->pts, 4);
 489
 490         /* reset SM */
 491         xoutb(0x80, REG_FLAGS0(iobase));
 492
 493         /* Enable access to the message buffer */
 494         DEBUGP(5, dev, "Enable access to the messages buffer\n");
 495         dev->flags1 = 0x20      /* T_Active */
 496             | (test_bit(IS_INVREV, &dev->flags) ? 0x02 : 0x00) /* inv parity */
 497             | ((dev->baudv >> 8) & 0x01);       /* MSB-baud */
 498         xoutb(dev->flags1, REG_FLAGS1(iobase));
 499
 500         DEBUGP(5, dev, "Enable message buffer -> flags1 = 0x%.2x\n",
 501                dev->flags1);
 502
 503         /* write challenge to the buffer */
 504         DEBUGP(5, dev, "Write challenge to buffer: ");
 505         for (i = 0; i < 4; i++) {
 506                 xoutb(i, REG_BUF_ADDR(iobase));
 507                 xoutb(dev->pts[i], REG_BUF_DATA(iobase));       /* buf data */
 508 #ifdef CM4000_DEBUG
 509                 pr_debug("0x%.2x ", dev->pts[i]);
 510         }
 511         pr_debug("\n");
 512 #else
 513         }
 514 #endif
 515
 516         /* set number of bytes to write */
 517         DEBUGP(5, dev, "Set number of bytes to write\n");
 518         xoutb(0x04, REG_NUM_SEND(iobase));
 519
 520         /* Trigger CARDMAN CONTROLLER */
 521         xoutb(0x50, REG_FLAGS0(iobase));
 522
 523         /* Monitor progress */
 524         /* wait for xmit done */
 525         DEBUGP(5, dev, "Waiting for NumRecBytes getting valid\n");
 526
 527         for (i = 0; i < 100; i++) {
 528                 if (inb(REG_FLAGS0(iobase)) & 0x08) {
 529                         DEBUGP(5, dev, "NumRecBytes is valid\n");
 530                         break;
 531                 }
 532                 usleep_range(10000, 11000);
 533         }
 534         if (i == 100) {
 535                 DEBUGP(5, dev, "Timeout waiting for NumRecBytes getting "
 536                        "valid\n");
 537                 rc = -EIO;
 538                 goto exit_setprotocol;
 539         }
 540
 541         DEBUGP(5, dev, "Reading NumRecBytes\n");
 542         for (i = 0; i < 100; i++) {
 543                 io_read_num_rec_bytes(iobase, &num_bytes_read);
 544                 if (num_bytes_read >= 4) {
 545                         DEBUGP(2, dev, "NumRecBytes = %i\n", num_bytes_read);
 546                         if (num_bytes_read > 4) {
 547                                 rc = -EIO;
 548                                 goto exit_setprotocol;
 549                         }
 550                         break;
 551                 }
 552                 usleep_range(10000, 11000);
 553         }
 554
 555         /* check whether it is a short PTS reply? */
 556         if (num_bytes_read == 3)
 557                 i = 0;
 558
 559         if (i == 100) {
 560                 DEBUGP(5, dev, "Timeout reading num_bytes_read\n");
 561                 rc = -EIO;
 562                 goto exit_setprotocol;
 563         }
 564
 565         DEBUGP(5, dev, "Reset the CARDMAN CONTROLLER\n");
 566         xoutb(0x80, REG_FLAGS0(iobase));
 567
 568         /* Read PPS reply */
 569         DEBUGP(5, dev, "Read PPS reply\n");
 570         for (i = 0; i < num_bytes_read; i++) {
 571                 xoutb(i, REG_BUF_ADDR(iobase));
 572                 pts_reply[i] = inb(REG_BUF_DATA(iobase));
 573         }
 574
 575 #ifdef CM4000_DEBUG
 576         DEBUGP(2, dev, "PTSreply: ");
 577         for (i = 0; i < num_bytes_read; i++) {
 578                 pr_debug("0x%.2x ", pts_reply[i]);
 579         }
 580         pr_debug("\n");
 581 #endif  /* CM4000_DEBUG */
 582
 583         DEBUGP(5, dev, "Clear Tactive in Flags1\n");
 584         xoutb(0x20, REG_FLAGS1(iobase));
 585
 586         /* Compare ptsreq and ptsreply */
 587         if ((dev->pts[0] == pts_reply[0]) &&
 588             (dev->pts[1] == pts_reply[1]) &&
 589             (dev->pts[2] == pts_reply[2]) && (dev->pts[3] == pts_reply[3])) {
 590                 /* setcardparameter according to PPS */
 591                 dev->baudv = calc_baudv(dev->pts[2]);
 592                 set_cardparameter(dev);
 593         } else if ((dev->pts[0] == pts_reply[0]) &&
 594                    ((dev->pts[1] & 0xef) == pts_reply[1]) &&
 595                    ((pts_reply[0] ^ pts_reply[1]) == pts_reply[2])) {
 596                 /* short PTS reply, set card parameter to default values */
 597                 dev->baudv = calc_baudv(0x11);
 598                 set_cardparameter(dev);
 599         } else
 600                 rc = -EIO;
 601
 602 exit_setprotocol:
 603         DEBUGP(3, dev, "<- set_protocol\n");
 604         return rc;
 605 }
 606
 607 static int io_detect_cm4000(unsigned int iobase, struct cm4000_dev *dev)
 608 {
 609
 610         /* note: statemachine is assumed to be reset */
 611         if (inb(REG_FLAGS0(iobase)) & 8) {
 612                 clear_bit(IS_ATR_VALID, &dev->flags);
 613                 set_bit(IS_CMM_ABSENT, &dev->flags);
 614                 return 0;       /* detect CMM = 1 -> failure */
 615         }
 616         /* xoutb(0x40, REG_FLAGS1(iobase)); detectCMM */
 617         xoutb(dev->flags1 | 0x40, REG_FLAGS1(iobase));
 618         if ((inb(REG_FLAGS0(iobase)) & 8) == 0) {
 619                 clear_bit(IS_ATR_VALID, &dev->flags);
 620                 set_bit(IS_CMM_ABSENT, &dev->flags);
 621                 return 0;       /* detect CMM=0 -> failure */
 622         }
 623         /* clear detectCMM again by restoring original flags1 */
 624         xoutb(dev->flags1, REG_FLAGS1(iobase));
 625         return 1;
 626 }
 627
 628 static void terminate_monitor(struct cm4000_dev *dev)
 629 {
 630
 631         /* tell the monitor to stop and wait until
 632          * it terminates.
 633          */
 634         DEBUGP(3, dev, "-> terminate_monitor\n");
 635         wait_event_interruptible(dev->devq,
 636                                  test_and_set_bit(LOCK_MONITOR,
 637                                                   (void *)&dev->flags));
 638
 639         /* now, LOCK_MONITOR has been set.
 640          * allow a last cycle in the monitor.
 641          * the monitor will indicate that it has
 642          * finished by clearing this bit.
 643          */
 644         DEBUGP(5, dev, "Now allow last cycle of monitor!\n");
 645         while (test_bit(LOCK_MONITOR, (void *)&dev->flags))
 646                 msleep(25);
 647
 648         DEBUGP(5, dev, "Delete timer\n");
 649         del_timer_sync(&dev->timer);
 650 #ifdef CM4000_DEBUG
 651         dev->monitor_running = 0;
 652 #endif
 653
 654         DEBUGP(3, dev, "<- terminate_monitor\n");
 655 }
 656
 657 /*
 658  * monitor the card every 50msec. as a side-effect, retrieve the
 659  * atr once a card is inserted. another side-effect of retrieving the
 660  * atr is that the card will be powered on, so there is no need to
 661  * power on the card explicitly from the application: the driver
 662  * is already doing that for you.
 663  */
 664
 665 static void monitor_card(struct timer_list *t)
 666 {
 667         struct cm4000_dev *dev = from_timer(dev, t, timer);
 668         unsigned int iobase = dev->p_dev->resource[0]->start;
 669         unsigned short s;
 670         struct ptsreq ptsreq;
 671         int i, atrc;
 672
 673         DEBUGP(7, dev, "->  monitor_card\n");
 674
 675         /* if someone has set the lock for us: we're done! */
 676         if (test_and_set_bit(LOCK_MONITOR, &dev->flags)) {
 677                 DEBUGP(4, dev, "About to stop monitor\n");
 678                 /* no */
 679                 dev->rlen =
 680                     dev->rpos =
 681                     dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
 682                 dev->mstate = M_FETCH_ATR;
 683                 clear_bit(LOCK_MONITOR, &dev->flags);
 684                 /* close et al. are sleeping on devq, so wake it */
 685                 wake_up_interruptible(&dev->devq);
 686                 DEBUGP(2, dev, "<- monitor_card (we are done now)\n");
 687                 return;
 688         }
 689
 690         /* try to lock io: if it is already locked, just add another timer */
 691         if (test_and_set_bit(LOCK_IO, (void *)&dev->flags)) {
 692                 DEBUGP(4, dev, "Couldn't get IO lock\n");
 693                 goto return_with_timer;
 694         }
 695
 696         /* is a card/a reader inserted at all ? */
 697         dev->flags0 = xinb(REG_FLAGS0(iobase));
 698         DEBUGP(7, dev, "dev->flags0 = 0x%2x\n", dev->flags0);
 699         DEBUGP(7, dev, "smartcard present: %s\n",
 700                dev->flags0 & 1 ? "yes" : "no");
 701         DEBUGP(7, dev, "cardman present: %s\n",
 702                dev->flags0 == 0xff ? "no" : "yes");
 703
 704         if ((dev->flags0 & 1) == 0      /* no smartcard inserted */
 705             || dev->flags0 == 0xff) {   /* no cardman inserted */
 706                 /* no */
 707                 dev->rlen =
 708                     dev->rpos =
 709                     dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
 710                 dev->mstate = M_FETCH_ATR;
 711
 712                 dev->flags &= 0x000000ff; /* only keep IO and MONITOR locks */
 713
 714                 if (dev->flags0 == 0xff) {
 715                         DEBUGP(4, dev, "set IS_CMM_ABSENT bit\n");
 716                         set_bit(IS_CMM_ABSENT, &dev->flags);
 717                 } else if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
 718                         DEBUGP(4, dev, "clear IS_CMM_ABSENT bit "
 719                                "(card is removed)\n");
 720                         clear_bit(IS_CMM_ABSENT, &dev->flags);
 721                 }
 722
 723                 goto release_io;
 724         } else if ((dev->flags0 & 1) && test_bit(IS_CMM_ABSENT, &dev->flags)) {
 725                 /* cardman and card present but cardman was absent before
 726                  * (after suspend with inserted card) */
 727                 DEBUGP(4, dev, "clear IS_CMM_ABSENT bit (card is inserted)\n");
 728                 clear_bit(IS_CMM_ABSENT, &dev->flags);
 729         }
 730
 731         if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
 732                 DEBUGP(7, dev, "believe ATR is already valid (do nothing)\n");
 733                 goto release_io;
 734         }
 735
 736         switch (dev->mstate) {
 737         case M_CARDOFF: {
 738                 unsigned char flags0;
 739
 740                 DEBUGP(4, dev, "M_CARDOFF\n");
 741                 flags0 = inb(REG_FLAGS0(iobase));
 742                 if (flags0 & 0x02) {
 743                         /* wait until Flags0 indicate power is off */
 744                         dev->mdelay = T_10MSEC;
 745                 } else {
 746                         /* Flags0 indicate power off and no card inserted now;
 747                          * Reset CARDMAN CONTROLLER */
 748                         xoutb(0x80, REG_FLAGS0(iobase));
 749
 750                         /* prepare for fetching ATR again: after card off ATR
 751                          * is read again automatically */
 752                         dev->rlen =
 753                             dev->rpos =
 754                             dev->atr_csum =
 755                             dev->atr_len_retry = dev->cwarn = 0;
 756                         dev->mstate = M_FETCH_ATR;
 757
 758                         /* minimal gap between CARDOFF and read ATR is 50msec */
 759                         dev->mdelay = T_50MSEC;
 760                 }
 761                 break;
 762         }
 763         case M_FETCH_ATR:
 764                 DEBUGP(4, dev, "M_FETCH_ATR\n");
 765                 xoutb(0x80, REG_FLAGS0(iobase));
 766                 DEBUGP(4, dev, "Reset BAUDV to 9600\n");
 767                 dev->baudv = 0x173;     /* 9600 */
 768                 xoutb(0x02, REG_STOPBITS(iobase));      /* stopbits=2 */
 769                 xoutb(0x73, REG_BAUDRATE(iobase));      /* baud value */
 770                 xoutb(0x21, REG_FLAGS1(iobase));        /* T_Active=1, baud
 771                                                            value */
 772                 /* warm start vs. power on: */
 773                 xoutb(dev->flags0 & 2 ? 0x46 : 0x44, REG_FLAGS0(iobase));
 774                 dev->mdelay = T_40MSEC;
 775                 dev->mstate = M_TIMEOUT_WAIT;
 776                 break;
 777         case M_TIMEOUT_WAIT:
 778                 DEBUGP(4, dev, "M_TIMEOUT_WAIT\n");
 779                 /* numRecBytes */
 780                 io_read_num_rec_bytes(iobase, &dev->atr_len);
 781                 dev->mdelay = T_10MSEC;
 782                 dev->mstate = M_READ_ATR_LEN;
 783                 break;
 784         case M_READ_ATR_LEN:
 785                 DEBUGP(4, dev, "M_READ_ATR_LEN\n");
 786                 /* infinite loop possible, since there is no timeout */
 787
 788 #define MAX_ATR_LEN_RETRY       100
 789
 790                 if (dev->atr_len == io_read_num_rec_bytes(iobase, &s)) {
 791                         if (dev->atr_len_retry++ >= MAX_ATR_LEN_RETRY) {                                        /* + XX msec */
 792                                 dev->mdelay = T_10MSEC;
 793                                 dev->mstate = M_READ_ATR;
 794                         }
 795                 } else {
 796                         dev->atr_len = s;
 797                         dev->atr_len_retry = 0; /* set new timeout */
 798                 }
 799
 800                 DEBUGP(4, dev, "Current ATR_LEN = %i\n", dev->atr_len);
 801                 break;
 802         case M_READ_ATR:
 803                 DEBUGP(4, dev, "M_READ_ATR\n");
 804                 xoutb(0x80, REG_FLAGS0(iobase));        /* reset SM */
 805                 for (i = 0; i < dev->atr_len; i++) {
 806                         xoutb(i, REG_BUF_ADDR(iobase));
 807                         dev->atr[i] = inb(REG_BUF_DATA(iobase));
 808                 }
 809                 /* Deactivate T_Active flags */
 810                 DEBUGP(4, dev, "Deactivate T_Active flags\n");
 811                 dev->flags1 = 0x01;
 812                 xoutb(dev->flags1, REG_FLAGS1(iobase));
 813
 814                 /* atr is present (which doesn't mean it's valid) */
 815                 set_bit(IS_ATR_PRESENT, &dev->flags);
 816                 if (dev->atr[0] == 0x03)
 817                         str_invert_revert(dev->atr, dev->atr_len);
 818                 atrc = parse_atr(dev);
 819                 if (atrc == 0) {        /* atr invalid */
 820                         dev->mdelay = 0;
 821                         dev->mstate = M_BAD_CARD;
 822                 } else {
 823                         dev->mdelay = T_50MSEC;
 824                         dev->mstate = M_ATR_PRESENT;
 825                         set_bit(IS_ATR_VALID, &dev->flags);
 826                 }
 827
 828                 if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
 829                         DEBUGP(4, dev, "monitor_card: ATR valid\n");
 830                         /* if ta1 == 0x11, no PPS necessary (default values) */
 831                         /* do not do PPS with multi protocol cards */
 832                         if ((test_bit(IS_AUTOPPS_ACT, &dev->flags) == 0) &&
 833                             (dev->ta1 != 0x11) &&
 834                             !(test_bit(IS_ANY_T0, &dev->flags) &&
 835                             test_bit(IS_ANY_T1, &dev->flags))) {
 836                                 DEBUGP(4, dev, "Perform AUTOPPS\n");
 837                                 set_bit(IS_AUTOPPS_ACT, &dev->flags);
 838                                 ptsreq.protocol = (0x01 << dev->proto);
 839                                 ptsreq.flags = 0x01;
 840                                 ptsreq.pts1 = 0x00;
 841                                 ptsreq.pts2 = 0x00;
 842                                 ptsreq.pts3 = 0x00;
 843                                 if (set_protocol(dev, &ptsreq) == 0) {
 844                                         DEBUGP(4, dev, "AUTOPPS ret SUCC\n");
 845                                         clear_bit(IS_AUTOPPS_ACT, &dev->flags);
 846                                         wake_up_interruptible(&dev->atrq);
 847                                 } else {
 848                                         DEBUGP(4, dev, "AUTOPPS failed: "
 849                                                "repower using defaults\n");
 850                                         /* prepare for repowering  */
 851                                         clear_bit(IS_ATR_PRESENT, &dev->flags);
 852                                         clear_bit(IS_ATR_VALID, &dev->flags);
 853                                         dev->rlen =
 854                                             dev->rpos =
 855                                             dev->atr_csum =
 856                                             dev->atr_len_retry = dev->cwarn = 0;
 857                                         dev->mstate = M_FETCH_ATR;
 858
 859                                         dev->mdelay = T_50MSEC;
 860                                 }
 861                         } else {
 862                                 /* for cards which use slightly different
 863                                  * params (extra guard time) */
 864                                 set_cardparameter(dev);
 865                                 if (test_bit(IS_AUTOPPS_ACT, &dev->flags) == 1)
 866                                         DEBUGP(4, dev, "AUTOPPS already active "
 867                                                "2nd try:use default values\n");
 868                                 if (dev->ta1 == 0x11)
 869                                         DEBUGP(4, dev, "No AUTOPPS necessary "
 870                                                "TA(1)==0x11\n");
 871                                 if (test_bit(IS_ANY_T0, &dev->flags)
 872                                     && test_bit(IS_ANY_T1, &dev->flags))
 873                                         DEBUGP(4, dev, "Do NOT perform AUTOPPS "
 874                                                "with multiprotocol cards\n");
 875                                 clear_bit(IS_AUTOPPS_ACT, &dev->flags);
 876                                 wake_up_interruptible(&dev->atrq);
 877                         }
 878                 } else {
 879                         DEBUGP(4, dev, "ATR invalid\n");
 880                         wake_up_interruptible(&dev->atrq);
 881                 }
 882                 break;
 883         case M_BAD_CARD:
 884                 DEBUGP(4, dev, "M_BAD_CARD\n");
 885                 /* slow down warning, but prompt immediately after insertion */
 886                 if (dev->cwarn == 0 || dev->cwarn == 10) {
 887                         set_bit(IS_BAD_CARD, &dev->flags);
 888                         dev_warn(&dev->p_dev->dev, MODULE_NAME ": ");
 889                         if (test_bit(IS_BAD_CSUM, &dev->flags)) {
 890                                 DEBUGP(4, dev, "ATR checksum (0x%.2x, should "
 891                                        "be zero) failed\n", dev->atr_csum);
 892                         }
 893 #ifdef CM4000_DEBUG
 894                         else if (test_bit(IS_BAD_LENGTH, &dev->flags)) {
 895                                 DEBUGP(4, dev, "ATR length error\n");
 896                         } else {
 897                                 DEBUGP(4, dev, "card damaged or wrong way "
 898                                         "inserted\n");
 899                         }
 900 #endif
 901                         dev->cwarn = 0;
 902                         wake_up_interruptible(&dev->atrq);      /* wake open */
 903                 }
 904                 dev->cwarn++;
 905                 dev->mdelay = T_100MSEC;
 906                 dev->mstate = M_FETCH_ATR;
 907                 break;
 908         default:
 909                 DEBUGP(7, dev, "Unknown action\n");
 910                 break;          /* nothing */
 911         }
 912
 913 release_io:
 914         DEBUGP(7, dev, "release_io\n");
 915         clear_bit(LOCK_IO, &dev->flags);
 916         wake_up_interruptible(&dev->ioq);       /* whoever needs IO */
 917
 918 return_with_timer:
 919         DEBUGP(7, dev, "<- monitor_card (returns with timer)\n");
 920         mod_timer(&dev->timer, jiffies + dev->mdelay);
 921         clear_bit(LOCK_MONITOR, &dev->flags);
 922 }
 923
 924 /* Interface to userland (file_operations) */
 925
 926 static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
 927                         loff_t *ppos)
 928 {
 929         struct cm4000_dev *dev = filp->private_data;
 930         unsigned int iobase = dev->p_dev->resource[0]->start;
 931         ssize_t rc;
 932         int i, j, k;
 933
 934         DEBUGP(2, dev, "-> cmm_read(%s,%d)\n", current->comm, current->pid);
 935
 936         if (count == 0)         /* according to manpage */
 937                 return 0;
 938
 939         if (!pcmcia_dev_present(dev->p_dev) || /* device removed */
 940             test_bit(IS_CMM_ABSENT, &dev->flags))
 941                 return -ENODEV;
 942
 943         if (test_bit(IS_BAD_CSUM, &dev->flags))
 944                 return -EIO;
 945
 946         /* also see the note about this in cmm_write */
 947         if (wait_event_interruptible
 948             (dev->atrq,
 949              ((filp->f_flags & O_NONBLOCK)
 950               || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
 951                 if (filp->f_flags & O_NONBLOCK)
 952                         return -EAGAIN;
 953                 return -ERESTARTSYS;
 954         }
 955
 956         if (test_bit(IS_ATR_VALID, &dev->flags) == 0)
 957                 return -EIO;
 958
 959         /* this one implements blocking IO */
 960         if (wait_event_interruptible
 961             (dev->readq,
 962              ((filp->f_flags & O_NONBLOCK) || (dev->rpos < dev->rlen)))) {
 963                 if (filp->f_flags & O_NONBLOCK)
 964                         return -EAGAIN;
 965                 return -ERESTARTSYS;
 966         }
 967
 968         /* lock io */
 969         if (wait_event_interruptible
 970             (dev->ioq,
 971              ((filp->f_flags & O_NONBLOCK)
 972               || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
 973                 if (filp->f_flags & O_NONBLOCK)
 974                         return -EAGAIN;
 975                 return -ERESTARTSYS;
 976         }
 977
 978         rc = 0;
 979         dev->flags0 = inb(REG_FLAGS0(iobase));
 980         if ((dev->flags0 & 1) == 0      /* no smartcard inserted */
 981             || dev->flags0 == 0xff) {   /* no cardman inserted */
 982                 clear_bit(IS_ATR_VALID, &dev->flags);
 983                 if (dev->flags0 & 1) {
 984                         set_bit(IS_CMM_ABSENT, &dev->flags);
 985                         rc = -ENODEV;
 986                 } else {
 987                         rc = -EIO;
 988                 }
 989                 goto release_io;
 990         }
 991
 992         DEBUGP(4, dev, "begin read answer\n");
 993         j = min(count, (size_t)(dev->rlen - dev->rpos));
 994         k = dev->rpos;
 995         if (k + j > 255)
 996                 j = 256 - k;
 997         DEBUGP(4, dev, "read1 j=%d\n", j);
 998         for (i = 0; i < j; i++) {
 999                 xoutb(k++, REG_BUF_ADDR(iobase));
1000                 dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
1001         }
1002         j = min(count, (size_t)(dev->rlen - dev->rpos));
1003         if (k + j > 255) {
1004                 DEBUGP(4, dev, "read2 j=%d\n", j);
1005                 dev->flags1 |= 0x10;    /* MSB buf addr set */
1006                 xoutb(dev->flags1, REG_FLAGS1(iobase));
1007                 for (; i < j; i++) {
1008                         xoutb(k++, REG_BUF_ADDR(iobase));
1009                         dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
1010                 }
1011         }
1012
1013         if (dev->proto == 0 && count > dev->rlen - dev->rpos && i) {
1014                 DEBUGP(4, dev, "T=0 and count > buffer\n");
1015                 dev->rbuf[i] = dev->rbuf[i - 1];
1016                 dev->rbuf[i - 1] = dev->procbyte;
1017                 j++;
1018         }
1019         count = j;
1020
1021         dev->rpos = dev->rlen + 1;
1022
1023         /* Clear T1Active */
1024         DEBUGP(4, dev, "Clear T1Active\n");
1025         dev->flags1 &= 0xdf;
1026         xoutb(dev->flags1, REG_FLAGS1(iobase));
1027
1028         xoutb(0, REG_FLAGS1(iobase));   /* clear detectCMM */
1029         /* last check before exit */
1030         if (!io_detect_cm4000(iobase, dev)) {
1031                 rc = -ENODEV;
1032                 goto release_io;
1033         }
1034
1035         if (test_bit(IS_INVREV, &dev->flags) && count > 0)
1036                 str_invert_revert(dev->rbuf, count);
1037
1038         if (copy_to_user(buf, dev->rbuf, count))
1039                 rc = -EFAULT;
1040
1041 release_io:
1042         clear_bit(LOCK_IO, &dev->flags);
1043         wake_up_interruptible(&dev->ioq);
1044
1045         DEBUGP(2, dev, "<- cmm_read returns: rc = %zi\n",
1046                (rc < 0 ? rc : count));
1047         return rc < 0 ? rc : count;
1048 }
1049
1050 static ssize_t cmm_write(struct file *filp, const char __user *buf,
1051                          size_t count, loff_t *ppos)
1052 {
1053         struct cm4000_dev *dev = filp->private_data;
1054         unsigned int iobase = dev->p_dev->resource[0]->start;
1055         unsigned short s;
1056         unsigned char infolen;
1057         unsigned char sendT0;
1058         unsigned short nsend;
1059         unsigned short nr;
1060         ssize_t rc;
1061         int i;
1062
1063         DEBUGP(2, dev, "-> cmm_write(%s,%d)\n", current->comm, current->pid);
1064
1065         if (count == 0)         /* according to manpage */
1066                 return 0;
1067
1068         if (dev->proto == 0 && count < 4) {
1069                 /* T0 must have at least 4 bytes */
1070                 DEBUGP(4, dev, "T0 short write\n");
1071                 return -EIO;
1072         }
1073
1074         nr = count & 0x1ff;     /* max bytes to write */
1075
1076         sendT0 = dev->proto ? 0 : nr > 5 ? 0x08 : 0;
1077
1078         if (!pcmcia_dev_present(dev->p_dev) || /* device removed */
1079             test_bit(IS_CMM_ABSENT, &dev->flags))
1080                 return -ENODEV;
1081
1082         if (test_bit(IS_BAD_CSUM, &dev->flags)) {
1083                 DEBUGP(4, dev, "bad csum\n");
1084                 return -EIO;
1085         }
1086
1087         /*
1088          * wait for atr to become valid.
1089          * note: it is important to lock this code. if we dont, the monitor
1090          * could be run between test_bit and the call to sleep on the
1091          * atr-queue.  if *then* the monitor detects atr valid, it will wake up
1092          * any process on the atr-queue, *but* since we have been interrupted,
1093          * we do not yet sleep on this queue. this would result in a missed
1094          * wake_up and the calling process would sleep forever (until
1095          * interrupted).  also, do *not* restore_flags before sleep_on, because
1096          * this could result in the same situation!
1097          */
1098         if (wait_event_interruptible
1099             (dev->atrq,
1100              ((filp->f_flags & O_NONBLOCK)
1101               || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
1102                 if (filp->f_flags & O_NONBLOCK)
1103                         return -EAGAIN;
1104                 return -ERESTARTSYS;
1105         }
1106
1107         if (test_bit(IS_ATR_VALID, &dev->flags) == 0) { /* invalid atr */
1108                 DEBUGP(4, dev, "invalid ATR\n");
1109                 return -EIO;
1110         }
1111
1112         /* lock io */
1113         if (wait_event_interruptible
1114             (dev->ioq,
1115              ((filp->f_flags & O_NONBLOCK)
1116               || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
1117                 if (filp->f_flags & O_NONBLOCK)
1118                         return -EAGAIN;
1119                 return -ERESTARTSYS;
1120         }
1121
1122         if (copy_from_user(dev->sbuf, buf, ((count > 512) ? 512 : count)))
1123                 return -EFAULT;
1124
1125         rc = 0;
1126         dev->flags0 = inb(REG_FLAGS0(iobase));
1127         if ((dev->flags0 & 1) == 0      /* no smartcard inserted */
1128             || dev->flags0 == 0xff) {   /* no cardman inserted */
1129                 clear_bit(IS_ATR_VALID, &dev->flags);
1130                 if (dev->flags0 & 1) {
1131                         set_bit(IS_CMM_ABSENT, &dev->flags);
1132                         rc = -ENODEV;
1133                 } else {
1134                         DEBUGP(4, dev, "IO error\n");
1135                         rc = -EIO;
1136                 }
1137                 goto release_io;
1138         }
1139
1140         xoutb(0x80, REG_FLAGS0(iobase));        /* reset SM  */
1141
1142         if (!io_detect_cm4000(iobase, dev)) {
1143                 rc = -ENODEV;
1144                 goto release_io;
1145         }
1146
1147         /* reflect T=0 send/read mode in flags1 */
1148         dev->flags1 |= (sendT0);
1149
1150         set_cardparameter(dev);
1151
1152         /* dummy read, reset flag procedure received */
1153         inb(REG_FLAGS1(iobase));
1154
1155         dev->flags1 = 0x20      /* T_Active */
1156             | (sendT0)
1157             | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)/* inverse parity  */
1158             | (((dev->baudv - 1) & 0x0100) >> 8);       /* MSB-Baud */
1159         DEBUGP(1, dev, "set dev->flags1 = 0x%.2x\n", dev->flags1);
1160         xoutb(dev->flags1, REG_FLAGS1(iobase));
1161
1162         /* xmit data */
1163         DEBUGP(4, dev, "Xmit data\n");
1164         for (i = 0; i < nr; i++) {
1165                 if (i >= 256) {
1166                         dev->flags1 = 0x20      /* T_Active */
1167                             | (sendT0)  /* SendT0 */
1168                                 /* inverse parity: */
1169                             | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)
1170                             | (((dev->baudv - 1) & 0x0100) >> 8) /* MSB-Baud */
1171                             | 0x10;     /* set address high */
1172                         DEBUGP(4, dev, "dev->flags = 0x%.2x - set address "
1173                                "high\n", dev->flags1);
1174                         xoutb(dev->flags1, REG_FLAGS1(iobase));
1175                 }
1176                 if (test_bit(IS_INVREV, &dev->flags)) {
1177                         DEBUGP(4, dev, "Apply inverse convention for 0x%.2x "
1178                                 "-> 0x%.2x\n", (unsigned char)dev->sbuf[i],
1179                               invert_revert(dev->sbuf[i]));
1180                         xoutb(i, REG_BUF_ADDR(iobase));
1181                         xoutb(invert_revert(dev->sbuf[i]),
1182                               REG_BUF_DATA(iobase));
1183                 } else {
1184                         xoutb(i, REG_BUF_ADDR(iobase));
1185                         xoutb(dev->sbuf[i], REG_BUF_DATA(iobase));
1186                 }
1187         }
1188         DEBUGP(4, dev, "Xmit done\n");
1189
1190         if (dev->proto == 0) {
1191                 /* T=0 proto: 0 byte reply  */
1192                 if (nr == 4) {
1193                         DEBUGP(4, dev, "T=0 assumes 0 byte reply\n");
1194                         xoutb(i, REG_BUF_ADDR(iobase));
1195                         if (test_bit(IS_INVREV, &dev->flags))
1196                                 xoutb(0xff, REG_BUF_DATA(iobase));
1197                         else
1198                                 xoutb(0x00, REG_BUF_DATA(iobase));
1199                 }
1200
1201                 /* numSendBytes */
1202                 if (sendT0)
1203                         nsend = nr;
1204                 else {
1205                         if (nr == 4)
1206                                 nsend = 5;
1207                         else {
1208                                 nsend = 5 + (unsigned char)dev->sbuf[4];
1209                                 if (dev->sbuf[4] == 0)
1210                                         nsend += 0x100;
1211                         }
1212                 }
1213         } else
1214                 nsend = nr;
1215
1216         /* T0: output procedure byte */
1217         if (test_bit(IS_INVREV, &dev->flags)) {
1218                 DEBUGP(4, dev, "T=0 set Procedure byte (inverse-reverse) "
1219                        "0x%.2x\n", invert_revert(dev->sbuf[1]));
1220                 xoutb(invert_revert(dev->sbuf[1]), REG_NUM_BYTES(iobase));
1221         } else {
1222                 DEBUGP(4, dev, "T=0 set Procedure byte 0x%.2x\n", dev->sbuf[1]);
1223                 xoutb(dev->sbuf[1], REG_NUM_BYTES(iobase));
1224         }
1225
1226         DEBUGP(1, dev, "set NumSendBytes = 0x%.2x\n",
1227                (unsigned char)(nsend & 0xff));
1228         xoutb((unsigned char)(nsend & 0xff), REG_NUM_SEND(iobase));
1229
1230         DEBUGP(1, dev, "Trigger CARDMAN CONTROLLER (0x%.2x)\n",
1231                0x40     /* SM_Active */
1232               | (dev->flags0 & 2 ? 0 : 4)       /* power on if needed */
1233               |(dev->proto ? 0x10 : 0x08)       /* T=1/T=0 */
1234               |(nsend & 0x100) >> 8 /* MSB numSendBytes */ );
1235         xoutb(0x40              /* SM_Active */
1236               | (dev->flags0 & 2 ? 0 : 4)       /* power on if needed */
1237               |(dev->proto ? 0x10 : 0x08)       /* T=1/T=0 */
1238               |(nsend & 0x100) >> 8,    /* MSB numSendBytes */
1239               REG_FLAGS0(iobase));
1240
1241         /* wait for xmit done */
1242         if (dev->proto == 1) {
1243                 DEBUGP(4, dev, "Wait for xmit done\n");
1244                 for (i = 0; i < 1000; i++) {
1245                         if (inb(REG_FLAGS0(iobase)) & 0x08)
1246                                 break;
1247                         msleep_interruptible(10);
1248                 }
1249                 if (i == 1000) {
1250                         DEBUGP(4, dev, "timeout waiting for xmit done\n");
1251                         rc = -EIO;
1252                         goto release_io;
1253                 }
1254         }
1255
1256         /* T=1: wait for infoLen */
1257
1258         infolen = 0;
1259         if (dev->proto) {
1260                 /* wait until infoLen is valid */
1261                 for (i = 0; i < 6000; i++) {    /* max waiting time of 1 min */
1262                         io_read_num_rec_bytes(iobase, &s);
1263                         if (s >= 3) {
1264                                 infolen = inb(REG_FLAGS1(iobase));
1265                                 DEBUGP(4, dev, "infolen=%d\n", infolen);
1266                                 break;
1267                         }
1268                         msleep_interruptible(10);
1269                 }
1270                 if (i == 6000) {
1271                         DEBUGP(4, dev, "timeout waiting for infoLen\n");
1272                         rc = -EIO;
1273                         goto release_io;
1274                 }
1275         } else
1276                 clear_bit(IS_PROCBYTE_PRESENT, &dev->flags);
1277
1278         /* numRecBytes | bit9 of numRecytes */
1279         io_read_num_rec_bytes(iobase, &dev->rlen);
1280         for (i = 0; i < 600; i++) {     /* max waiting time of 2 sec */
1281                 if (dev->proto) {
1282                         if (dev->rlen >= infolen + 4)
1283                                 break;
1284                 }
1285                 msleep_interruptible(10);
1286                 /* numRecBytes | bit9 of numRecytes */
1287                 io_read_num_rec_bytes(iobase, &s);
1288                 if (s > dev->rlen) {
1289                         DEBUGP(1, dev, "NumRecBytes inc (reset timeout)\n");
1290                         i = 0;  /* reset timeout */
1291                         dev->rlen = s;
1292                 }
1293                 /* T=0: we are done when numRecBytes doesn't
1294                  *      increment any more and NoProcedureByte
1295                  *      is set and numRecBytes == bytes sent + 6
1296                  *      (header bytes + data + 1 for sw2)
1297                  *      except when the card replies an error
1298                  *      which means, no data will be sent back.
1299                  */
1300                 else if (dev->proto == 0) {
1301                         if ((inb(REG_BUF_ADDR(iobase)) & 0x80)) {
1302                                 /* no procedure byte received since last read */
1303                                 DEBUGP(1, dev, "NoProcedure byte set\n");
1304                                 /* i=0; */
1305                         } else {
1306                                 /* procedure byte received since last read */
1307                                 DEBUGP(1, dev, "NoProcedure byte unset "
1308                                         "(reset timeout)\n");
1309                                 dev->procbyte = inb(REG_FLAGS1(iobase));
1310                                 DEBUGP(1, dev, "Read procedure byte 0x%.2x\n",
1311                                       dev->procbyte);
1312                                 i = 0;  /* resettimeout */
1313                         }
1314                         if (inb(REG_FLAGS0(iobase)) & 0x08) {
1315                                 DEBUGP(1, dev, "T0Done flag (read reply)\n");
1316                                 break;
1317                         }
1318                 }
1319                 if (dev->proto)
1320                         infolen = inb(REG_FLAGS1(iobase));
1321         }
1322         if (i == 600) {
1323                 DEBUGP(1, dev, "timeout waiting for numRecBytes\n");
1324                 rc = -EIO;
1325                 goto release_io;
1326         } else {
1327                 if (dev->proto == 0) {
1328                         DEBUGP(1, dev, "Wait for T0Done bit to be  set\n");
1329                         for (i = 0; i < 1000; i++) {
1330                                 if (inb(REG_FLAGS0(iobase)) & 0x08)
1331                                         break;
1332                                 msleep_interruptible(10);
1333                         }
1334                         if (i == 1000) {
1335                                 DEBUGP(1, dev, "timeout waiting for T0Done\n");
1336                                 rc = -EIO;
1337                                 goto release_io;
1338                         }
1339
1340                         dev->procbyte = inb(REG_FLAGS1(iobase));
1341                         DEBUGP(4, dev, "Read procedure byte 0x%.2x\n",
1342                               dev->procbyte);
1343
1344                         io_read_num_rec_bytes(iobase, &dev->rlen);
1345                         DEBUGP(4, dev, "Read NumRecBytes = %i\n", dev->rlen);
1346
1347                 }
1348         }
1349         /* T=1: read offset=zero, T=0: read offset=after challenge */
1350         dev->rpos = dev->proto ? 0 : nr == 4 ? 5 : nr > dev->rlen ? 5 : nr;
1351         DEBUGP(4, dev, "dev->rlen = %i,  dev->rpos = %i, nr = %i\n",
1352               dev->rlen, dev->rpos, nr);
1353
1354 release_io:
1355         DEBUGP(4, dev, "Reset SM\n");
1356         xoutb(0x80, REG_FLAGS0(iobase));        /* reset SM */
1357
1358         if (rc < 0) {
1359                 DEBUGP(4, dev, "Write failed but clear T_Active\n");
1360                 dev->flags1 &= 0xdf;
1361                 xoutb(dev->flags1, REG_FLAGS1(iobase));
1362         }
1363
1364         clear_bit(LOCK_IO, &dev->flags);
1365         wake_up_interruptible(&dev->ioq);
1366         wake_up_interruptible(&dev->readq);     /* tell read we have data */
1367
1368         /* ITSEC E2: clear write buffer */
1369         memset((char *)dev->sbuf, 0, 512);
1370
1371         /* return error or actually written bytes */
1372         DEBUGP(2, dev, "<- cmm_write\n");
1373         return rc < 0 ? rc : nr;
1374 }
1375
1376 static void start_monitor(struct cm4000_dev *dev)
1377 {
1378         DEBUGP(3, dev, "-> start_monitor\n");
1379         if (!dev->monitor_running) {
1380                 DEBUGP(5, dev, "create, init and add timer\n");
1381                 timer_setup(&dev->timer, monitor_card, 0);
1382                 dev->monitor_running = 1;
1383                 mod_timer(&dev->timer, jiffies);
1384         } else
1385                 DEBUGP(5, dev, "monitor already running\n");
1386         DEBUGP(3, dev, "<- start_monitor\n");
1387 }
1388
1389 static void stop_monitor(struct cm4000_dev *dev)
1390 {
1391         DEBUGP(3, dev, "-> stop_monitor\n");
1392         if (dev->monitor_running) {
1393                 DEBUGP(5, dev, "stopping monitor\n");
1394                 terminate_monitor(dev);
1395                 /* reset monitor SM */
1396                 clear_bit(IS_ATR_VALID, &dev->flags);
1397                 clear_bit(IS_ATR_PRESENT, &dev->flags);
1398         } else
1399                 DEBUGP(5, dev, "monitor already stopped\n");
1400         DEBUGP(3, dev, "<- stop_monitor\n");
1401 }
1402
1403 static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1404 {
1405         struct cm4000_dev *dev = filp->private_data;
1406         unsigned int iobase = dev->p_dev->resource[0]->start;
1407         struct inode *inode = file_inode(filp);
1408         struct pcmcia_device *link;
1409         int rc;
1410         void __user *argp = (void __user *)arg;
1411 #ifdef CM4000_DEBUG
1412         char *ioctl_names[CM_IOC_MAXNR + 1] = {
1413                 [_IOC_NR(CM_IOCGSTATUS)] "CM_IOCGSTATUS",
1414                 [_IOC_NR(CM_IOCGATR)] "CM_IOCGATR",
1415                 [_IOC_NR(CM_IOCARDOFF)] "CM_IOCARDOFF",
1416                 [_IOC_NR(CM_IOCSPTS)] "CM_IOCSPTS",
1417                 [_IOC_NR(CM_IOSDBGLVL)] "CM4000_DBGLVL",
1418         };
1419         DEBUGP(3, dev, "cmm_ioctl(device=%d.%d) %s\n", imajor(inode),
1420                iminor(inode), ioctl_names[_IOC_NR(cmd)]);
1421 #endif
1422
1423         mutex_lock(&cmm_mutex);
1424         rc = -ENODEV;
1425         link = dev_table[iminor(inode)];
1426         if (!pcmcia_dev_present(link)) {
1427                 DEBUGP(4, dev, "DEV_OK false\n");
1428                 goto out;
1429         }
1430
1431         if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
1432                 DEBUGP(4, dev, "CMM_ABSENT flag set\n");
1433                 goto out;
1434         }
1435         rc = -EINVAL;
1436
1437         if (_IOC_TYPE(cmd) != CM_IOC_MAGIC) {
1438                 DEBUGP(4, dev, "ioctype mismatch\n");
1439                 goto out;
1440         }
1441         if (_IOC_NR(cmd) > CM_IOC_MAXNR) {
1442                 DEBUGP(4, dev, "iocnr mismatch\n");
1443                 goto out;
1444         }
1445         rc = 0;
1446
1447         switch (cmd) {
1448         case CM_IOCGSTATUS:
1449                 DEBUGP(4, dev, " ... in CM_IOCGSTATUS\n");
1450                 {
1451                         int status;
1452
1453                         /* clear other bits, but leave inserted & powered as
1454                          * they are */
1455                         status = dev->flags0 & 3;
1456                         if (test_bit(IS_ATR_PRESENT, &dev->flags))
1457                                 status |= CM_ATR_PRESENT;
1458                         if (test_bit(IS_ATR_VALID, &dev->flags))
1459                                 status |= CM_ATR_VALID;
1460                         if (test_bit(IS_CMM_ABSENT, &dev->flags))
1461                                 status |= CM_NO_READER;
1462                         if (test_bit(IS_BAD_CARD, &dev->flags))
1463                                 status |= CM_BAD_CARD;
1464                         if (copy_to_user(argp, &status, sizeof(int)))
1465                                 rc = -EFAULT;
1466                 }
1467                 break;
1468         case CM_IOCGATR:
1469                 DEBUGP(4, dev, "... in CM_IOCGATR\n");
1470                 {
1471                         struct atreq __user *atreq = argp;
1472                         int tmp;
1473                         /* allow nonblocking io and being interrupted */
1474                         if (wait_event_interruptible
1475                             (dev->atrq,
1476                              ((filp->f_flags & O_NONBLOCK)
1477                               || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
1478                                   != 0)))) {
1479                                 if (filp->f_flags & O_NONBLOCK)
1480                                         rc = -EAGAIN;
1481                                 else
1482                                         rc = -ERESTARTSYS;
1483                                 break;
1484                         }
1485
1486                         rc = -EFAULT;
1487                         if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {
1488                                 tmp = -1;
1489                                 if (copy_to_user(&(atreq->atr_len), &tmp,
1490                                                  sizeof(int)))
1491                                         break;
1492                         } else {
1493                                 if (copy_to_user(atreq->atr, dev->atr,
1494                                                  dev->atr_len))
1495                                         break;
1496
1497                                 tmp = dev->atr_len;
1498                                 if (copy_to_user(&(atreq->atr_len), &tmp, sizeof(int)))
1499                                         break;
1500                         }
1501                         rc = 0;
1502                         break;
1503                 }
1504         case CM_IOCARDOFF:
1505
1506 #ifdef CM4000_DEBUG
1507                 DEBUGP(4, dev, "... in CM_IOCARDOFF\n");
1508                 if (dev->flags0 & 0x01) {
1509                         DEBUGP(4, dev, "    Card inserted\n");
1510                 } else {
1511                         DEBUGP(2, dev, "    No card inserted\n");
1512                 }
1513                 if (dev->flags0 & 0x02) {
1514                         DEBUGP(4, dev, "    Card powered\n");
1515                 } else {
1516                         DEBUGP(2, dev, "    Card not powered\n");
1517                 }
1518 #endif
1519
1520                 /* is a card inserted and powered? */
1521                 if ((dev->flags0 & 0x01) && (dev->flags0 & 0x02)) {
1522
1523                         /* get IO lock */
1524                         if (wait_event_interruptible
1525                             (dev->ioq,
1526                              ((filp->f_flags & O_NONBLOCK)
1527                               || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
1528                                   == 0)))) {
1529                                 if (filp->f_flags & O_NONBLOCK)
1530                                         rc = -EAGAIN;
1531                                 else
1532                                         rc = -ERESTARTSYS;
1533                                 break;
1534                         }
1535                         /* Set Flags0 = 0x42 */
1536                         DEBUGP(4, dev, "Set Flags0=0x42 \n");
1537                         xoutb(0x42, REG_FLAGS0(iobase));
1538                         clear_bit(IS_ATR_PRESENT, &dev->flags);
1539                         clear_bit(IS_ATR_VALID, &dev->flags);
1540                         dev->mstate = M_CARDOFF;
1541                         clear_bit(LOCK_IO, &dev->flags);
1542                         if (wait_event_interruptible
1543                             (dev->atrq,
1544                              ((filp->f_flags & O_NONBLOCK)
1545                               || (test_bit(IS_ATR_VALID, (void *)&dev->flags) !=
1546                                   0)))) {
1547                                 if (filp->f_flags & O_NONBLOCK)
1548                                         rc = -EAGAIN;
1549                                 else
1550                                         rc = -ERESTARTSYS;
1551                                 break;
1552                         }
1553                 }
1554                 /* release lock */
1555                 clear_bit(LOCK_IO, &dev->flags);
1556                 wake_up_interruptible(&dev->ioq);
1557
1558                 rc = 0;
1559                 break;
1560         case CM_IOCSPTS:
1561                 {
1562                         struct ptsreq krnptsreq;
1563
1564                         if (copy_from_user(&krnptsreq, argp,
1565                                            sizeof(struct ptsreq))) {
1566                                 rc = -EFAULT;
1567                                 break;
1568                         }
1569
1570                         rc = 0;
1571                         DEBUGP(4, dev, "... in CM_IOCSPTS\n");
1572                         /* wait for ATR to get valid */
1573                         if (wait_event_interruptible
1574                             (dev->atrq,
1575                              ((filp->f_flags & O_NONBLOCK)
1576                               || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
1577                                   != 0)))) {
1578                                 if (filp->f_flags & O_NONBLOCK)
1579                                         rc = -EAGAIN;
1580                                 else
1581                                         rc = -ERESTARTSYS;
1582                                 break;
1583                         }
1584                         /* get IO lock */
1585                         if (wait_event_interruptible
1586                             (dev->ioq,
1587                              ((filp->f_flags & O_NONBLOCK)
1588                               || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
1589                                   == 0)))) {
1590                                 if (filp->f_flags & O_NONBLOCK)
1591                                         rc = -EAGAIN;
1592                                 else
1593                                         rc = -ERESTARTSYS;
1594                                 break;
1595                         }
1596
1597                         if ((rc = set_protocol(dev, &krnptsreq)) != 0) {
1598                                 /* auto power_on again */
1599                                 dev->mstate = M_FETCH_ATR;
1600                                 clear_bit(IS_ATR_VALID, &dev->flags);
1601                         }
1602                         /* release lock */
1603                         clear_bit(LOCK_IO, &dev->flags);
1604                         wake_up_interruptible(&dev->ioq);
1605
1606                 }
1607                 break;
1608 #ifdef CM4000_DEBUG
1609         case CM_IOSDBGLVL:
1610                 rc = -ENOTTY;
1611                 break;
1612 #endif
1613         default:
1614                 DEBUGP(4, dev, "... in default (unknown IOCTL code)\n");
1615                 rc = -ENOTTY;
1616         }
1617 out:
1618         mutex_unlock(&cmm_mutex);
1619         return rc;
1620 }
1621
1622 static int cmm_open(struct inode *inode, struct file *filp)
1623 {
1624         struct cm4000_dev *dev;
1625         struct pcmcia_device *link;
1626         int minor = iminor(inode);
1627         int ret;
1628
1629         if (minor >= CM4000_MAX_DEV)
1630                 return -ENODEV;
1631
1632         mutex_lock(&cmm_mutex);
1633         link = dev_table[minor];
1634         if (link == NULL || !pcmcia_dev_present(link)) {
1635                 ret = -ENODEV;
1636                 goto out;
1637         }
1638
1639         if (link->open) {
1640                 ret = -EBUSY;
1641                 goto out;
1642         }
1643
1644         dev = link->priv;
1645         filp->private_data = dev;
1646
1647         DEBUGP(2, dev, "-> cmm_open(device=%d.%d process=%s,%d)\n",
1648               imajor(inode), minor, current->comm, current->pid);
1649
1650         /* init device variables, they may be "polluted" after close
1651          * or, the device may never have been closed (i.e. open failed)
1652          */
1653
1654         ZERO_DEV(dev);
1655
1656         /* opening will always block since the
1657          * monitor will be started by open, which
1658          * means we have to wait for ATR becoming
1659          * valid = block until valid (or card
1660          * inserted)
1661          */
1662         if (filp->f_flags & O_NONBLOCK) {
1663                 ret = -EAGAIN;
1664                 goto out;
1665         }
1666
1667         dev->mdelay = T_50MSEC;
1668
1669         /* start monitoring the cardstatus */
1670         start_monitor(dev);
1671
1672         link->open = 1;         /* only one open per device */
1673
1674         DEBUGP(2, dev, "<- cmm_open\n");
1675         ret = stream_open(inode, filp);
1676 out:
1677         mutex_unlock(&cmm_mutex);
1678         return ret;
1679 }
1680
1681 static int cmm_close(struct inode *inode, struct file *filp)
1682 {
1683         struct cm4000_dev *dev;
1684         struct pcmcia_device *link;
1685         int minor = iminor(inode);
1686
1687         if (minor >= CM4000_MAX_DEV)
1688                 return -ENODEV;
1689
1690         link = dev_table[minor];
1691         if (link == NULL)
1692                 return -ENODEV;
1693
1694         dev = link->priv;
1695
1696         DEBUGP(2, dev, "-> cmm_close(maj/min=%d.%d)\n",
1697                imajor(inode), minor);
1698
1699         stop_monitor(dev);
1700
1701         ZERO_DEV(dev);
1702
1703         link->open = 0;         /* only one open per device */
1704         wake_up(&dev->devq);    /* socket removed? */
1705
1706         DEBUGP(2, dev, "cmm_close\n");
1707         return 0;
1708 }
1709
1710 static void cmm_cm4000_release(struct pcmcia_device * link)
1711 {
1712         struct cm4000_dev *dev = link->priv;
1713
1714         /* dont terminate the monitor, rather rely on
1715          * close doing that for us.
1716          */
1717         DEBUGP(3, dev, "-> cmm_cm4000_release\n");
1718         while (link->open) {
1719                 printk(KERN_INFO MODULE_NAME ": delaying release until "
1720                        "process has terminated\n");
1721                 /* note: don't interrupt us:
1722                  * close the applications which own
1723                  * the devices _first_ !
1724                  */
1725                 wait_event(dev->devq, (link->open == 0));
1726         }
1727         /* dev->devq=NULL;      this cannot be zeroed earlier */
1728         DEBUGP(3, dev, "<- cmm_cm4000_release\n");
1729         return;
1730 }
1731
1732 /*==== Interface to PCMCIA Layer =======================================*/
1733
1734 static int cm4000_config_check(struct pcmcia_device *p_dev, void *priv_data)
1735 {
1736         return pcmcia_request_io(p_dev);
1737 }
1738
1739 static int cm4000_config(struct pcmcia_device * link, int devno)
1740 {
1741         link->config_flags |= CONF_AUTO_SET_IO;
1742
1743         /* read the config-tuples */
1744         if (pcmcia_loop_config(link, cm4000_config_check, NULL))
1745                 goto cs_release;
1746
1747         if (pcmcia_enable_device(link))
1748                 goto cs_release;
1749
1750         return 0;
1751
1752 cs_release:
1753         cm4000_release(link);
1754         return -ENODEV;
1755 }
1756
1757 static int cm4000_suspend(struct pcmcia_device *link)
1758 {
1759         struct cm4000_dev *dev;
1760
1761         dev = link->priv;
1762         stop_monitor(dev);
1763
1764         return 0;
1765 }
1766
1767 static int cm4000_resume(struct pcmcia_device *link)
1768 {
1769         struct cm4000_dev *dev;
1770
1771         dev = link->priv;
1772         if (link->open)
1773                 start_monitor(dev);
1774
1775         return 0;
1776 }
1777
1778 static void cm4000_release(struct pcmcia_device *link)
1779 {
1780         cmm_cm4000_release(link);       /* delay release until device closed */
1781         pcmcia_disable_device(link);
1782 }
1783
1784 static int cm4000_probe(struct pcmcia_device *link)
1785 {
1786         struct cm4000_dev *dev;
1787         int i, ret;
1788
1789         for (i = 0; i < CM4000_MAX_DEV; i++)
1790                 if (dev_table[i] == NULL)
1791                         break;
1792
1793         if (i == CM4000_MAX_DEV) {
1794                 printk(KERN_NOTICE MODULE_NAME ": all devices in use\n");
1795                 return -ENODEV;
1796         }
1797
1798         /* create a new cm4000_cs device */
1799         dev = kzalloc(sizeof(struct cm4000_dev), GFP_KERNEL);
1800         if (dev == NULL)
1801                 return -ENOMEM;
1802
1803         dev->p_dev = link;
1804         link->priv = dev;
1805         dev_table[i] = link;
1806
1807         init_waitqueue_head(&dev->devq);
1808         init_waitqueue_head(&dev->ioq);
1809         init_waitqueue_head(&dev->atrq);
1810         init_waitqueue_head(&dev->readq);
1811
1812         ret = cm4000_config(link, i);
1813         if (ret) {
1814                 dev_table[i] = NULL;
1815                 kfree(dev);
1816                 return ret;
1817         }
1818
1819         device_create(cmm_class, NULL, MKDEV(major, i), NULL, "cmm%d", i);
1820
1821         return 0;
1822 }
1823
1824 static void cm4000_detach(struct pcmcia_device *link)
1825 {
1826         struct cm4000_dev *dev = link->priv;
1827         int devno;
1828
1829         /* find device */
1830         for (devno = 0; devno < CM4000_MAX_DEV; devno++)
1831                 if (dev_table[devno] == link)
1832                         break;
1833         if (devno == CM4000_MAX_DEV)
1834                 return;
1835
1836         stop_monitor(dev);
1837
1838         cm4000_release(link);
1839
1840         dev_table[devno] = NULL;
1841         kfree(dev);
1842
1843         device_destroy(cmm_class, MKDEV(major, devno));
1844
1845         return;
1846 }
1847
1848 static const struct file_operations cm4000_fops = {
1849         .owner  = THIS_MODULE,
1850         .read   = cmm_read,
1851         .write  = cmm_write,
1852         .unlocked_ioctl = cmm_ioctl,
1853         .open   = cmm_open,
1854         .release= cmm_close,
1855         .llseek = no_llseek,
1856 };
1857
1858 static const struct pcmcia_device_id cm4000_ids[] = {
1859         PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0002),
1860         PCMCIA_DEVICE_PROD_ID12("CardMan", "4000", 0x2FB368CA, 0xA2BD8C39),
1861         PCMCIA_DEVICE_NULL,
1862 };
1863 MODULE_DEVICE_TABLE(pcmcia, cm4000_ids);
1864
1865 static struct pcmcia_driver cm4000_driver = {
1866         .owner    = THIS_MODULE,
1867         .name     = "cm4000_cs",
1868         .probe    = cm4000_probe,
1869         .remove   = cm4000_detach,
1870         .suspend  = cm4000_suspend,
1871         .resume   = cm4000_resume,
1872         .id_table = cm4000_ids,
1873 };
1874
1875 static int __init cmm_init(void)
1876 {
1877         int rc;
1878
1879         cmm_class = class_create(THIS_MODULE, "cardman_4000");
1880         if (IS_ERR(cmm_class))
1881                 return PTR_ERR(cmm_class);
1882
1883         major = register_chrdev(0, DEVICE_NAME, &cm4000_fops);
1884         if (major < 0) {
1885                 printk(KERN_WARNING MODULE_NAME
1886                         ": could not get major number\n");
1887                 class_destroy(cmm_class);
1888                 return major;
1889         }
1890
1891         rc = pcmcia_register_driver(&cm4000_driver);
1892         if (rc < 0) {
1893                 unregister_chrdev(major, DEVICE_NAME);
1894                 class_destroy(cmm_class);
1895                 return rc;
1896         }
1897
1898         return 0;
1899 }
1900
1901 static void __exit cmm_exit(void)
1902 {
1903         pcmcia_unregister_driver(&cm4000_driver);
1904         unregister_chrdev(major, DEVICE_NAME);
1905         class_destroy(cmm_class);
1906 };
1907
1908 module_init(cmm_init);
1909 module_exit(cmm_exit);
1910 MODULE_LICENSE("Dual BSD/GPL");