drivers/char/pcmcia/cm4000

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This source file includes following definitions.
xoutb
xinb
invert_revert
str_invert_revert
calc_baudv
io_read_num_rec_bytes
parse_atr
set_cardparameter
set_protocol
io_detect_cm4000
terminate_monitor
monitor_card
cmm_read
cmm_write
start_monitor
stop_monitor
cmm_ioctl
cmm_open
cmm_close
cmm_cm4000_release
cm4000_config_check
cm4000_config
cm4000_suspend
cm4000_resume
cm4000_release
cm4000_probe
cm4000_detach
cmm_init
cmm_exit
   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 fields.
 120          * initialising to zero depends on it - see ZERO_DEV below.  */
 121         unsigned char atr_csum;
 122         unsigned char atr_len_retry;
 123         unsigned short atr_len;
 124         unsigned short rlen;    /* bytes avail. after write */
 125         unsigned short rpos;    /* latest read pos. write zeroes */
 126         unsigned char procbyte; /* T=0 procedure byte */
 127         unsigned char mstate;   /* state of card monitor */
 128         unsigned char cwarn;    /* slow down warning */
 129         unsigned char flags0;   /* cardman IO-flags 0 */
 130         unsigned char flags1;   /* cardman IO-flags 1 */
 131         unsigned int mdelay;    /* variable monitor speeds, in jiffies */
 132 
 133         unsigned int baudv;     /* baud value for speed */
 134         unsigned char ta1;
 135         unsigned char proto;    /* T=0, T=1, ... */
 136         unsigned long flags;    /* lock+flags (MONITOR,IO,ATR) * for concurrent
 137                                    access */
 138 
 139         unsigned char pts[4];
 140 
 141         struct timer_list timer;        /* used to keep monitor running */
 142         int monitor_running;
 143 };
 144 
 145 #define ZERO_DEV(dev)                                           \
 146         memset(&dev->atr_csum,0,                                \
 147                 sizeof(struct cm4000_dev) -                     \
 148                 offsetof(struct cm4000_dev, atr_csum))
 149 
 150 static struct pcmcia_device *dev_table[CM4000_MAX_DEV];
 151 static struct class *cmm_class;
 152 
 153 /* This table doesn't use spaces after the comma between fields and thus
 154  * violates process/coding-style.rst.  However, I don't really think wrapping it around will
 155  * make it any clearer to read -HW */
 156 static unsigned char fi_di_table[10][14] = {
 157 /*FI     00   01   02   03   04   05   06   07   08   09   10   11   12   13 */
 158 /*DI */
 159 /* 0 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
 160 /* 1 */ {0x01,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x91,0x11,0x11,0x11,0x11},
 161 /* 2 */ {0x02,0x12,0x22,0x32,0x11,0x11,0x11,0x11,0x11,0x92,0xA2,0xB2,0x11,0x11},
 162 /* 3 */ {0x03,0x13,0x23,0x33,0x43,0x53,0x63,0x11,0x11,0x93,0xA3,0xB3,0xC3,0xD3},
 163 /* 4 */ {0x04,0x14,0x24,0x34,0x44,0x54,0x64,0x11,0x11,0x94,0xA4,0xB4,0xC4,0xD4},
 164 /* 5 */ {0x00,0x15,0x25,0x35,0x45,0x55,0x65,0x11,0x11,0x95,0xA5,0xB5,0xC5,0xD5},
 165 /* 6 */ {0x06,0x16,0x26,0x36,0x46,0x56,0x66,0x11,0x11,0x96,0xA6,0xB6,0xC6,0xD6},
 166 /* 7 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
 167 /* 8 */ {0x08,0x11,0x28,0x38,0x48,0x58,0x68,0x11,0x11,0x98,0xA8,0xB8,0xC8,0xD8},
 168 /* 9 */ {0x09,0x19,0x29,0x39,0x49,0x59,0x69,0x11,0x11,0x99,0xA9,0xB9,0xC9,0xD9}
 169 };
 170 
 171 #ifndef CM4000_DEBUG
 172 #define xoutb   outb
 173 #define xinb    inb
 174 #else
 175 static inline void xoutb(unsigned char val, unsigned short port)
 176 {
 177         pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
 178         outb(val, port);
 179 }
 180 static inline unsigned char xinb(unsigned short port)
 181 {
 182         unsigned char val;
 183 
 184         val = inb(port);
 185         pr_debug("%.2x=inb(%.4x)\n", val, port);
 186 
 187         return val;
 188 }
 189 #endif
 190 
 191 static inline unsigned char invert_revert(unsigned char ch)
 192 {
 193         return bitrev8(~ch);
 194 }
 195 
 196 static void str_invert_revert(unsigned char *b, int len)
 197 {
 198         int i;
 199 
 200         for (i = 0; i < len; i++)
 201                 b[i] = invert_revert(b[i]);
 202 }
 203 
 204 #define ATRLENCK(dev,pos) \
 205         if (pos>=dev->atr_len || pos>=MAX_ATR) \
 206                 goto return_0;
 207 
 208 static unsigned int calc_baudv(unsigned char fidi)
 209 {
 210         unsigned int wcrcf, wbrcf, fi_rfu, di_rfu;
 211 
 212         fi_rfu = 372;
 213         di_rfu = 1;
 214 
 215         /* FI */
 216         switch ((fidi >> 4) & 0x0F) {
 217         case 0x00:
 218                 wcrcf = 372;
 219                 break;
 220         case 0x01:
 221                 wcrcf = 372;
 222                 break;
 223         case 0x02:
 224                 wcrcf = 558;
 225                 break;
 226         case 0x03:
 227                 wcrcf = 744;
 228                 break;
 229         case 0x04:
 230                 wcrcf = 1116;
 231                 break;
 232         case 0x05:
 233                 wcrcf = 1488;
 234                 break;
 235         case 0x06:
 236                 wcrcf = 1860;
 237                 break;
 238         case 0x07:
 239                 wcrcf = fi_rfu;
 240                 break;
 241         case 0x08:
 242                 wcrcf = fi_rfu;
 243                 break;
 244         case 0x09:
 245                 wcrcf = 512;
 246                 break;
 247         case 0x0A:
 248                 wcrcf = 768;
 249                 break;
 250         case 0x0B:
 251                 wcrcf = 1024;
 252                 break;
 253         case 0x0C:
 254                 wcrcf = 1536;
 255                 break;
 256         case 0x0D:
 257                 wcrcf = 2048;
 258                 break;
 259         default:
 260                 wcrcf = fi_rfu;
 261                 break;
 262         }
 263 
 264         /* DI */
 265         switch (fidi & 0x0F) {
 266         case 0x00:
 267                 wbrcf = di_rfu;
 268                 break;
 269         case 0x01:
 270                 wbrcf = 1;
 271                 break;
 272         case 0x02:
 273                 wbrcf = 2;
 274                 break;
 275         case 0x03:
 276                 wbrcf = 4;
 277                 break;
 278         case 0x04:
 279                 wbrcf = 8;
 280                 break;
 281         case 0x05:
 282                 wbrcf = 16;
 283                 break;
 284         case 0x06:
 285                 wbrcf = 32;
 286                 break;
 287         case 0x07:
 288                 wbrcf = di_rfu;
 289                 break;
 290         case 0x08:
 291                 wbrcf = 12;
 292                 break;
 293         case 0x09:
 294                 wbrcf = 20;
 295                 break;
 296         default:
 297                 wbrcf = di_rfu;
 298                 break;
 299         }
 300 
 301         return (wcrcf / wbrcf);
 302 }
 303 
 304 static unsigned short io_read_num_rec_bytes(unsigned int iobase,
 305                                             unsigned short *s)
 306 {
 307         unsigned short tmp;
 308 
 309         tmp = *s = 0;
 310         do {
 311                 *s = tmp;
 312                 tmp = inb(REG_NUM_BYTES(iobase)) |
 313                                 (inb(REG_FLAGS0(iobase)) & 4 ? 0x100 : 0);
 314         } while (tmp != *s);
 315 
 316         return *s;
 317 }
 318 
 319 static int parse_atr(struct cm4000_dev *dev)
 320 {
 321         unsigned char any_t1, any_t0;
 322         unsigned char ch, ifno;
 323         int ix, done;
 324 
 325         DEBUGP(3, dev, "-> parse_atr: dev->atr_len = %i\n", dev->atr_len);
 326 
 327         if (dev->atr_len < 3) {
 328                 DEBUGP(5, dev, "parse_atr: atr_len < 3\n");
 329                 return 0;
 330         }
 331 
 332         if (dev->atr[0] == 0x3f)
 333                 set_bit(IS_INVREV, &dev->flags);
 334         else
 335                 clear_bit(IS_INVREV, &dev->flags);
 336         ix = 1;
 337         ifno = 1;
 338         ch = dev->atr[1];
 339         dev->proto = 0;         /* XXX PROTO */
 340         any_t1 = any_t0 = done = 0;
 341         dev->ta1 = 0x11;        /* defaults to 9600 baud */
 342         do {
 343                 if (ifno == 1 && (ch & 0x10)) {
 344                         /* read first interface byte and TA1 is present */
 345                         dev->ta1 = dev->atr[2];
 346                         DEBUGP(5, dev, "Card says FiDi is 0x%.2x\n", dev->ta1);
 347                         ifno++;
 348                 } else if ((ifno == 2) && (ch & 0x10)) { /* TA(2) */
 349                         dev->ta1 = 0x11;
 350                         ifno++;
 351                 }
 352 
 353                 DEBUGP(5, dev, "Yi=%.2x\n", ch & 0xf0);
 354                 ix += ((ch & 0x10) >> 4)        /* no of int.face chars */
 355                     +((ch & 0x20) >> 5)
 356                     + ((ch & 0x40) >> 6)
 357                     + ((ch & 0x80) >> 7);
 358                 /* ATRLENCK(dev,ix); */
 359                 if (ch & 0x80) {        /* TDi */
 360                         ch = dev->atr[ix];
 361                         if ((ch & 0x0f)) {
 362                                 any_t1 = 1;
 363                                 DEBUGP(5, dev, "card is capable of T=1\n");
 364                         } else {
 365                                 any_t0 = 1;
 366                                 DEBUGP(5, dev, "card is capable of T=0\n");
 367                         }
 368                 } else
 369                         done = 1;
 370         } while (!done);
 371 
 372         DEBUGP(5, dev, "ix=%d noHist=%d any_t1=%d\n",
 373               ix, dev->atr[1] & 15, any_t1);
 374         if (ix + 1 + (dev->atr[1] & 0x0f) + any_t1 != dev->atr_len) {
 375                 DEBUGP(5, dev, "length error\n");
 376                 return 0;
 377         }
 378         if (any_t0)
 379                 set_bit(IS_ANY_T0, &dev->flags);
 380 
 381         if (any_t1) {           /* compute csum */
 382                 dev->atr_csum = 0;
 383 #ifdef ATR_CSUM
 384                 for (i = 1; i < dev->atr_len; i++)
 385                         dev->atr_csum ^= dev->atr[i];
 386                 if (dev->atr_csum) {
 387                         set_bit(IS_BAD_CSUM, &dev->flags);
 388                         DEBUGP(5, dev, "bad checksum\n");
 389                         goto return_0;
 390                 }
 391 #endif
 392                 if (any_t0 == 0)
 393                         dev->proto = 1; /* XXX PROTO */
 394                 set_bit(IS_ANY_T1, &dev->flags);
 395         }
 396 
 397         return 1;
 398 }
 399 
 400 struct card_fixup {
 401         char atr[12];
 402         u_int8_t atr_len;
 403         u_int8_t stopbits;
 404 };
 405 
 406 static struct card_fixup card_fixups[] = {
 407         {       /* ACOS */
 408                 .atr = { 0x3b, 0xb3, 0x11, 0x00, 0x00, 0x41, 0x01 },
 409                 .atr_len = 7,
 410                 .stopbits = 0x03,
 411         },
 412         {       /* Motorola */
 413                 .atr = {0x3b, 0x76, 0x13, 0x00, 0x00, 0x80, 0x62, 0x07,
 414                         0x41, 0x81, 0x81 },
 415                 .atr_len = 11,
 416                 .stopbits = 0x04,
 417         },
 418 };
 419 
 420 static void set_cardparameter(struct cm4000_dev *dev)
 421 {
 422         int i;
 423         unsigned int iobase = dev->p_dev->resource[0]->start;
 424         u_int8_t stopbits = 0x02; /* ISO default */
 425 
 426         DEBUGP(3, dev, "-> set_cardparameter\n");
 427 
 428         dev->flags1 = dev->flags1 | (((dev->baudv - 1) & 0x0100) >> 8);
 429         xoutb(dev->flags1, REG_FLAGS1(iobase));
 430         DEBUGP(5, dev, "flags1 = 0x%02x\n", dev->flags1);
 431 
 432         /* set baudrate */
 433         xoutb((unsigned char)((dev->baudv - 1) & 0xFF), REG_BAUDRATE(iobase));
 434 
 435         DEBUGP(5, dev, "baudv = %i -> write 0x%02x\n", dev->baudv,
 436               ((dev->baudv - 1) & 0xFF));
 437 
 438         /* set stopbits */
 439         for (i = 0; i < ARRAY_SIZE(card_fixups); i++) {
 440                 if (!memcmp(dev->atr, card_fixups[i].atr,
 441                             card_fixups[i].atr_len))
 442                         stopbits = card_fixups[i].stopbits;
 443         }
 444         xoutb(stopbits, REG_STOPBITS(iobase));
 445 
 446         DEBUGP(3, dev, "<- set_cardparameter\n");
 447 }
 448 
 449 static int set_protocol(struct cm4000_dev *dev, struct ptsreq *ptsreq)
 450 {
 451 
 452         unsigned long tmp, i;
 453         unsigned short num_bytes_read;
 454         unsigned char pts_reply[4];
 455         ssize_t rc;
 456         unsigned int iobase = dev->p_dev->resource[0]->start;
 457 
 458         rc = 0;
 459 
 460         DEBUGP(3, dev, "-> set_protocol\n");
 461         DEBUGP(5, dev, "ptsreq->Protocol = 0x%.8x, ptsreq->Flags=0x%.8x, "
 462                  "ptsreq->pts1=0x%.2x, ptsreq->pts2=0x%.2x, "
 463                  "ptsreq->pts3=0x%.2x\n", (unsigned int)ptsreq->protocol,
 464                  (unsigned int)ptsreq->flags, ptsreq->pts1, ptsreq->pts2,
 465                  ptsreq->pts3);
 466 
 467         /* Fill PTS structure */
 468         dev->pts[0] = 0xff;
 469         dev->pts[1] = 0x00;
 470         tmp = ptsreq->protocol;
 471         while ((tmp = (tmp >> 1)) > 0)
 472                 dev->pts[1]++;
 473         dev->proto = dev->pts[1];       /* Set new protocol */
 474         dev->pts[1] = (0x01 << 4) | (dev->pts[1]);
 475 
 476         /* Correct Fi/Di according to CM4000 Fi/Di table */
 477         DEBUGP(5, dev, "Ta(1) from ATR is 0x%.2x\n", dev->ta1);
 478         /* set Fi/Di according to ATR TA(1) */
 479         dev->pts[2] = fi_di_table[dev->ta1 & 0x0F][(dev->ta1 >> 4) & 0x0F];
 480 
 481         /* Calculate PCK character */
 482         dev->pts[3] = dev->pts[0] ^ dev->pts[1] ^ dev->pts[2];
 483 
 484         DEBUGP(5, dev, "pts0=%.2x, pts1=%.2x, pts2=%.2x, pts3=%.2x\n",
 485                dev->pts[0], dev->pts[1], dev->pts[2], dev->pts[3]);
 486 
 487         /* check card convention */
 488         if (test_bit(IS_INVREV, &dev->flags))
 489                 str_invert_revert(dev->pts, 4);
 490 
 491         /* reset SM */
 492         xoutb(0x80, REG_FLAGS0(iobase));
 493 
 494         /* Enable access to the message buffer */
 495         DEBUGP(5, dev, "Enable access to the messages buffer\n");
 496         dev->flags1 = 0x20      /* T_Active */
 497             | (test_bit(IS_INVREV, &dev->flags) ? 0x02 : 0x00) /* inv parity */
 498             | ((dev->baudv >> 8) & 0x01);       /* MSB-baud */
 499         xoutb(dev->flags1, REG_FLAGS1(iobase));
 500 
 501         DEBUGP(5, dev, "Enable message buffer -> flags1 = 0x%.2x\n",
 502                dev->flags1);
 503 
 504         /* write challenge to the buffer */
 505         DEBUGP(5, dev, "Write challenge to buffer: ");
 506         for (i = 0; i < 4; i++) {
 507                 xoutb(i, REG_BUF_ADDR(iobase));
 508                 xoutb(dev->pts[i], REG_BUF_DATA(iobase));       /* buf data */
 509 #ifdef CM4000_DEBUG
 510                 pr_debug("0x%.2x ", dev->pts[i]);
 511         }
 512         pr_debug("\n");
 513 #else
 514         }
 515 #endif
 516 
 517         /* set number of bytes to write */
 518         DEBUGP(5, dev, "Set number of bytes to write\n");
 519         xoutb(0x04, REG_NUM_SEND(iobase));
 520 
 521         /* Trigger CARDMAN CONTROLLER */
 522         xoutb(0x50, REG_FLAGS0(iobase));
 523 
 524         /* Monitor progress */
 525         /* wait for xmit done */
 526         DEBUGP(5, dev, "Waiting for NumRecBytes getting valid\n");
 527 
 528         for (i = 0; i < 100; i++) {
 529                 if (inb(REG_FLAGS0(iobase)) & 0x08) {
 530                         DEBUGP(5, dev, "NumRecBytes is valid\n");
 531                         break;
 532                 }
 533                 usleep_range(10000, 11000);
 534         }
 535         if (i == 100) {
 536                 DEBUGP(5, dev, "Timeout waiting for NumRecBytes getting "
 537                        "valid\n");
 538                 rc = -EIO;
 539                 goto exit_setprotocol;
 540         }
 541 
 542         DEBUGP(5, dev, "Reading NumRecBytes\n");
 543         for (i = 0; i < 100; i++) {
 544                 io_read_num_rec_bytes(iobase, &num_bytes_read);
 545                 if (num_bytes_read >= 4) {
 546                         DEBUGP(2, dev, "NumRecBytes = %i\n", num_bytes_read);
 547                         break;
 548                 }
 549                 usleep_range(10000, 11000);
 550         }
 551 
 552         /* check whether it is a short PTS reply? */
 553         if (num_bytes_read == 3)
 554                 i = 0;
 555 
 556         if (i == 100) {
 557                 DEBUGP(5, dev, "Timeout reading num_bytes_read\n");
 558                 rc = -EIO;
 559                 goto exit_setprotocol;
 560         }
 561 
 562         DEBUGP(5, dev, "Reset the CARDMAN CONTROLLER\n");
 563         xoutb(0x80, REG_FLAGS0(iobase));
 564 
 565         /* Read PPS reply */
 566         DEBUGP(5, dev, "Read PPS reply\n");
 567         for (i = 0; i < num_bytes_read; i++) {
 568                 xoutb(i, REG_BUF_ADDR(iobase));
 569                 pts_reply[i] = inb(REG_BUF_DATA(iobase));
 570         }
 571 
 572 #ifdef CM4000_DEBUG
 573         DEBUGP(2, dev, "PTSreply: ");
 574         for (i = 0; i < num_bytes_read; i++) {
 575                 pr_debug("0x%.2x ", pts_reply[i]);
 576         }
 577         pr_debug("\n");
 578 #endif  /* CM4000_DEBUG */
 579 
 580         DEBUGP(5, dev, "Clear Tactive in Flags1\n");
 581         xoutb(0x20, REG_FLAGS1(iobase));
 582 
 583         /* Compare ptsreq and ptsreply */
 584         if ((dev->pts[0] == pts_reply[0]) &&
 585             (dev->pts[1] == pts_reply[1]) &&
 586             (dev->pts[2] == pts_reply[2]) && (dev->pts[3] == pts_reply[3])) {
 587                 /* setcardparameter according to PPS */
 588                 dev->baudv = calc_baudv(dev->pts[2]);
 589                 set_cardparameter(dev);
 590         } else if ((dev->pts[0] == pts_reply[0]) &&
 591                    ((dev->pts[1] & 0xef) == pts_reply[1]) &&
 592                    ((pts_reply[0] ^ pts_reply[1]) == pts_reply[2])) {
 593                 /* short PTS reply, set card parameter to default values */
 594                 dev->baudv = calc_baudv(0x11);
 595                 set_cardparameter(dev);
 596         } else
 597                 rc = -EIO;
 598 
 599 exit_setprotocol:
 600         DEBUGP(3, dev, "<- set_protocol\n");
 601         return rc;
 602 }
 603 
 604 static int io_detect_cm4000(unsigned int iobase, struct cm4000_dev *dev)
 605 {
 606 
 607         /* note: statemachine is assumed to be reset */
 608         if (inb(REG_FLAGS0(iobase)) & 8) {
 609                 clear_bit(IS_ATR_VALID, &dev->flags);
 610                 set_bit(IS_CMM_ABSENT, &dev->flags);
 611                 return 0;       /* detect CMM = 1 -> failure */
 612         }
 613         /* xoutb(0x40, REG_FLAGS1(iobase)); detectCMM */
 614         xoutb(dev->flags1 | 0x40, REG_FLAGS1(iobase));
 615         if ((inb(REG_FLAGS0(iobase)) & 8) == 0) {
 616                 clear_bit(IS_ATR_VALID, &dev->flags);
 617                 set_bit(IS_CMM_ABSENT, &dev->flags);
 618                 return 0;       /* detect CMM=0 -> failure */
 619         }
 620         /* clear detectCMM again by restoring original flags1 */
 621         xoutb(dev->flags1, REG_FLAGS1(iobase));
 622         return 1;
 623 }
 624 
 625 static void terminate_monitor(struct cm4000_dev *dev)
 626 {
 627 
 628         /* tell the monitor to stop and wait until
 629          * it terminates.
 630          */
 631         DEBUGP(3, dev, "-> terminate_monitor\n");
 632         wait_event_interruptible(dev->devq,
 633                                  test_and_set_bit(LOCK_MONITOR,
 634                                                   (void *)&dev->flags));
 635 
 636         /* now, LOCK_MONITOR has been set.
 637          * allow a last cycle in the monitor.
 638          * the monitor will indicate that it has
 639          * finished by clearing this bit.
 640          */
 641         DEBUGP(5, dev, "Now allow last cycle of monitor!\n");
 642         while (test_bit(LOCK_MONITOR, (void *)&dev->flags))
 643                 msleep(25);
 644 
 645         DEBUGP(5, dev, "Delete timer\n");
 646         del_timer_sync(&dev->timer);
 647 #ifdef CM4000_DEBUG
 648         dev->monitor_running = 0;
 649 #endif
 650 
 651         DEBUGP(3, dev, "<- terminate_monitor\n");
 652 }
 653 
 654 /*
 655  * monitor the card every 50msec. as a side-effect, retrieve the
 656  * atr once a card is inserted. another side-effect of retrieving the
 657  * atr is that the card will be powered on, so there is no need to
 658  * power on the card explicitly from the application: the driver
 659  * is already doing that for you.
 660  */
 661 
 662 static void monitor_card(struct timer_list *t)
 663 {
 664         struct cm4000_dev *dev = from_timer(dev, t, timer);
 665         unsigned int iobase = dev->p_dev->resource[0]->start;
 666         unsigned short s;
 667         struct ptsreq ptsreq;
 668         int i, atrc;
 669 
 670         DEBUGP(7, dev, "->  monitor_card\n");
 671 
 672         /* if someone has set the lock for us: we're done! */
 673         if (test_and_set_bit(LOCK_MONITOR, &dev->flags)) {
 674                 DEBUGP(4, dev, "About to stop monitor\n");
 675                 /* no */
 676                 dev->rlen =
 677                     dev->rpos =
 678                     dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
 679                 dev->mstate = M_FETCH_ATR;
 680                 clear_bit(LOCK_MONITOR, &dev->flags);
 681                 /* close et al. are sleeping on devq, so wake it */
 682                 wake_up_interruptible(&dev->devq);
 683                 DEBUGP(2, dev, "<- monitor_card (we are done now)\n");
 684                 return;
 685         }
 686 
 687         /* try to lock io: if it is already locked, just add another timer */
 688         if (test_and_set_bit(LOCK_IO, (void *)&dev->flags)) {
 689                 DEBUGP(4, dev, "Couldn't get IO lock\n");
 690                 goto return_with_timer;
 691         }
 692 
 693         /* is a card/a reader inserted at all ? */
 694         dev->flags0 = xinb(REG_FLAGS0(iobase));
 695         DEBUGP(7, dev, "dev->flags0 = 0x%2x\n", dev->flags0);
 696         DEBUGP(7, dev, "smartcard present: %s\n",
 697                dev->flags0 & 1 ? "yes" : "no");
 698         DEBUGP(7, dev, "cardman present: %s\n",
 699                dev->flags0 == 0xff ? "no" : "yes");
 700 
 701         if ((dev->flags0 & 1) == 0      /* no smartcard inserted */
 702             || dev->flags0 == 0xff) {   /* no cardman inserted */
 703                 /* no */
 704                 dev->rlen =
 705                     dev->rpos =
 706                     dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
 707                 dev->mstate = M_FETCH_ATR;
 708 
 709                 dev->flags &= 0x000000ff; /* only keep IO and MONITOR locks */
 710 
 711                 if (dev->flags0 == 0xff) {
 712                         DEBUGP(4, dev, "set IS_CMM_ABSENT bit\n");
 713                         set_bit(IS_CMM_ABSENT, &dev->flags);
 714                 } else if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
 715                         DEBUGP(4, dev, "clear IS_CMM_ABSENT bit "
 716                                "(card is removed)\n");
 717                         clear_bit(IS_CMM_ABSENT, &dev->flags);
 718                 }
 719 
 720                 goto release_io;
 721         } else if ((dev->flags0 & 1) && test_bit(IS_CMM_ABSENT, &dev->flags)) {
 722                 /* cardman and card present but cardman was absent before
 723                  * (after suspend with inserted card) */
 724                 DEBUGP(4, dev, "clear IS_CMM_ABSENT bit (card is inserted)\n");
 725                 clear_bit(IS_CMM_ABSENT, &dev->flags);
 726         }
 727 
 728         if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
 729                 DEBUGP(7, dev, "believe ATR is already valid (do nothing)\n");
 730                 goto release_io;
 731         }
 732 
 733         switch (dev->mstate) {
 734                 unsigned char flags0;
 735         case M_CARDOFF:
 736                 DEBUGP(4, dev, "M_CARDOFF\n");
 737                 flags0 = inb(REG_FLAGS0(iobase));
 738                 if (flags0 & 0x02) {
 739                         /* wait until Flags0 indicate power is off */
 740                         dev->mdelay = T_10MSEC;
 741                 } else {
 742                         /* Flags0 indicate power off and no card inserted now;
 743                          * Reset CARDMAN CONTROLLER */
 744                         xoutb(0x80, REG_FLAGS0(iobase));
 745 
 746                         /* prepare for fetching ATR again: after card off ATR
 747                          * is read again automatically */
 748                         dev->rlen =
 749                             dev->rpos =
 750                             dev->atr_csum =
 751                             dev->atr_len_retry = dev->cwarn = 0;
 752                         dev->mstate = M_FETCH_ATR;
 753 
 754                         /* minimal gap between CARDOFF and read ATR is 50msec */
 755                         dev->mdelay = T_50MSEC;
 756                 }
 757                 break;
 758         case M_FETCH_ATR:
 759                 DEBUGP(4, dev, "M_FETCH_ATR\n");
 760                 xoutb(0x80, REG_FLAGS0(iobase));
 761                 DEBUGP(4, dev, "Reset BAUDV to 9600\n");
 762                 dev->baudv = 0x173;     /* 9600 */
 763                 xoutb(0x02, REG_STOPBITS(iobase));      /* stopbits=2 */
 764                 xoutb(0x73, REG_BAUDRATE(iobase));      /* baud value */
 765                 xoutb(0x21, REG_FLAGS1(iobase));        /* T_Active=1, baud
 766                                                            value */
 767                 /* warm start vs. power on: */
 768                 xoutb(dev->flags0 & 2 ? 0x46 : 0x44, REG_FLAGS0(iobase));
 769                 dev->mdelay = T_40MSEC;
 770                 dev->mstate = M_TIMEOUT_WAIT;
 771                 break;
 772         case M_TIMEOUT_WAIT:
 773                 DEBUGP(4, dev, "M_TIMEOUT_WAIT\n");
 774                 /* numRecBytes */
 775                 io_read_num_rec_bytes(iobase, &dev->atr_len);
 776                 dev->mdelay = T_10MSEC;
 777                 dev->mstate = M_READ_ATR_LEN;
 778                 break;
 779         case M_READ_ATR_LEN:
 780                 DEBUGP(4, dev, "M_READ_ATR_LEN\n");
 781                 /* infinite loop possible, since there is no timeout */
 782 
 783 #define MAX_ATR_LEN_RETRY       100
 784 
 785                 if (dev->atr_len == io_read_num_rec_bytes(iobase, &s)) {
 786                         if (dev->atr_len_retry++ >= MAX_ATR_LEN_RETRY) {                                        /* + XX msec */
 787                                 dev->mdelay = T_10MSEC;
 788                                 dev->mstate = M_READ_ATR;
 789                         }
 790                 } else {
 791                         dev->atr_len = s;
 792                         dev->atr_len_retry = 0; /* set new timeout */
 793                 }
 794 
 795                 DEBUGP(4, dev, "Current ATR_LEN = %i\n", dev->atr_len);
 796                 break;
 797         case M_READ_ATR:
 798                 DEBUGP(4, dev, "M_READ_ATR\n");
 799                 xoutb(0x80, REG_FLAGS0(iobase));        /* reset SM */
 800                 for (i = 0; i < dev->atr_len; i++) {
 801                         xoutb(i, REG_BUF_ADDR(iobase));
 802                         dev->atr[i] = inb(REG_BUF_DATA(iobase));
 803                 }
 804                 /* Deactivate T_Active flags */
 805                 DEBUGP(4, dev, "Deactivate T_Active flags\n");
 806                 dev->flags1 = 0x01;
 807                 xoutb(dev->flags1, REG_FLAGS1(iobase));
 808 
 809                 /* atr is present (which doesn't mean it's valid) */
 810                 set_bit(IS_ATR_PRESENT, &dev->flags);
 811                 if (dev->atr[0] == 0x03)
 812                         str_invert_revert(dev->atr, dev->atr_len);
 813                 atrc = parse_atr(dev);
 814                 if (atrc == 0) {        /* atr invalid */
 815                         dev->mdelay = 0;
 816                         dev->mstate = M_BAD_CARD;
 817                 } else {
 818                         dev->mdelay = T_50MSEC;
 819                         dev->mstate = M_ATR_PRESENT;
 820                         set_bit(IS_ATR_VALID, &dev->flags);
 821                 }
 822 
 823                 if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
 824                         DEBUGP(4, dev, "monitor_card: ATR valid\n");
 825                         /* if ta1 == 0x11, no PPS necessary (default values) */
 826                         /* do not do PPS with multi protocol cards */
 827                         if ((test_bit(IS_AUTOPPS_ACT, &dev->flags) == 0) &&
 828                             (dev->ta1 != 0x11) &&
 829                             !(test_bit(IS_ANY_T0, &dev->flags) &&
 830                             test_bit(IS_ANY_T1, &dev->flags))) {
 831                                 DEBUGP(4, dev, "Perform AUTOPPS\n");
 832                                 set_bit(IS_AUTOPPS_ACT, &dev->flags);
 833                                 ptsreq.protocol = (0x01 << dev->proto);
 834                                 ptsreq.flags = 0x01;
 835                                 ptsreq.pts1 = 0x00;
 836                                 ptsreq.pts2 = 0x00;
 837                                 ptsreq.pts3 = 0x00;
 838                                 if (set_protocol(dev, &ptsreq) == 0) {
 839                                         DEBUGP(4, dev, "AUTOPPS ret SUCC\n");
 840                                         clear_bit(IS_AUTOPPS_ACT, &dev->flags);
 841                                         wake_up_interruptible(&dev->atrq);
 842                                 } else {
 843                                         DEBUGP(4, dev, "AUTOPPS failed: "
 844                                                "repower using defaults\n");
 845                                         /* prepare for repowering  */
 846                                         clear_bit(IS_ATR_PRESENT, &dev->flags);
 847                                         clear_bit(IS_ATR_VALID, &dev->flags);
 848                                         dev->rlen =
 849                                             dev->rpos =
 850                                             dev->atr_csum =
 851                                             dev->atr_len_retry = dev->cwarn = 0;
 852                                         dev->mstate = M_FETCH_ATR;
 853 
 854                                         dev->mdelay = T_50MSEC;
 855                                 }
 856                         } else {
 857                                 /* for cards which use slightly different
 858                                  * params (extra guard time) */
 859                                 set_cardparameter(dev);
 860                                 if (test_bit(IS_AUTOPPS_ACT, &dev->flags) == 1)
 861                                         DEBUGP(4, dev, "AUTOPPS already active "
 862                                                "2nd try:use default values\n");
 863                                 if (dev->ta1 == 0x11)
 864                                         DEBUGP(4, dev, "No AUTOPPS necessary "
 865                                                "TA(1)==0x11\n");
 866                                 if (test_bit(IS_ANY_T0, &dev->flags)
 867                                     && test_bit(IS_ANY_T1, &dev->flags))
 868                                         DEBUGP(4, dev, "Do NOT perform AUTOPPS "
 869                                                "with multiprotocol cards\n");
 870                                 clear_bit(IS_AUTOPPS_ACT, &dev->flags);
 871                                 wake_up_interruptible(&dev->atrq);
 872                         }
 873                 } else {
 874                         DEBUGP(4, dev, "ATR invalid\n");
 875                         wake_up_interruptible(&dev->atrq);
 876                 }
 877                 break;
 878         case M_BAD_CARD:
 879                 DEBUGP(4, dev, "M_BAD_CARD\n");
 880                 /* slow down warning, but prompt immediately after insertion */
 881                 if (dev->cwarn == 0 || dev->cwarn == 10) {
 882                         set_bit(IS_BAD_CARD, &dev->flags);
 883                         dev_warn(&dev->p_dev->dev, MODULE_NAME ": ");
 884                         if (test_bit(IS_BAD_CSUM, &dev->flags)) {
 885                                 DEBUGP(4, dev, "ATR checksum (0x%.2x, should "
 886                                        "be zero) failed\n", dev->atr_csum);
 887                         }
 888 #ifdef CM4000_DEBUG
 889                         else if (test_bit(IS_BAD_LENGTH, &dev->flags)) {
 890                                 DEBUGP(4, dev, "ATR length error\n");
 891                         } else {
 892                                 DEBUGP(4, dev, "card damaged or wrong way "
 893                                         "inserted\n");
 894                         }
 895 #endif
 896                         dev->cwarn = 0;
 897                         wake_up_interruptible(&dev->atrq);      /* wake open */
 898                 }
 899                 dev->cwarn++;
 900                 dev->mdelay = T_100MSEC;
 901                 dev->mstate = M_FETCH_ATR;
 902                 break;
 903         default:
 904                 DEBUGP(7, dev, "Unknown action\n");
 905                 break;          /* nothing */
 906         }
 907 
 908 release_io:
 909         DEBUGP(7, dev, "release_io\n");
 910         clear_bit(LOCK_IO, &dev->flags);
 911         wake_up_interruptible(&dev->ioq);       /* whoever needs IO */
 912 
 913 return_with_timer:
 914         DEBUGP(7, dev, "<- monitor_card (returns with timer)\n");
 915         mod_timer(&dev->timer, jiffies + dev->mdelay);
 916         clear_bit(LOCK_MONITOR, &dev->flags);
 917 }
 918 
 919 /* Interface to userland (file_operations) */
 920 
 921 static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
 922                         loff_t *ppos)
 923 {
 924         struct cm4000_dev *dev = filp->private_data;
 925         unsigned int iobase = dev->p_dev->resource[0]->start;
 926         ssize_t rc;
 927         int i, j, k;
 928 
 929         DEBUGP(2, dev, "-> cmm_read(%s,%d)\n", current->comm, current->pid);
 930 
 931         if (count == 0)         /* according to manpage */
 932                 return 0;
 933 
 934         if (!pcmcia_dev_present(dev->p_dev) || /* device removed */
 935             test_bit(IS_CMM_ABSENT, &dev->flags))
 936                 return -ENODEV;
 937 
 938         if (test_bit(IS_BAD_CSUM, &dev->flags))
 939                 return -EIO;
 940 
 941         /* also see the note about this in cmm_write */
 942         if (wait_event_interruptible
 943             (dev->atrq,
 944              ((filp->f_flags & O_NONBLOCK)
 945               || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
 946                 if (filp->f_flags & O_NONBLOCK)
 947                         return -EAGAIN;
 948                 return -ERESTARTSYS;
 949         }
 950 
 951         if (test_bit(IS_ATR_VALID, &dev->flags) == 0)
 952                 return -EIO;
 953 
 954         /* this one implements blocking IO */
 955         if (wait_event_interruptible
 956             (dev->readq,
 957              ((filp->f_flags & O_NONBLOCK) || (dev->rpos < dev->rlen)))) {
 958                 if (filp->f_flags & O_NONBLOCK)
 959                         return -EAGAIN;
 960                 return -ERESTARTSYS;
 961         }
 962 
 963         /* lock io */
 964         if (wait_event_interruptible
 965             (dev->ioq,
 966              ((filp->f_flags & O_NONBLOCK)
 967               || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
 968                 if (filp->f_flags & O_NONBLOCK)
 969                         return -EAGAIN;
 970                 return -ERESTARTSYS;
 971         }
 972 
 973         rc = 0;
 974         dev->flags0 = inb(REG_FLAGS0(iobase));
 975         if ((dev->flags0 & 1) == 0      /* no smartcard inserted */
 976             || dev->flags0 == 0xff) {   /* no cardman inserted */
 977                 clear_bit(IS_ATR_VALID, &dev->flags);
 978                 if (dev->flags0 & 1) {
 979                         set_bit(IS_CMM_ABSENT, &dev->flags);
 980                         rc = -ENODEV;
 981                 } else {
 982                         rc = -EIO;
 983                 }
 984                 goto release_io;
 985         }
 986 
 987         DEBUGP(4, dev, "begin read answer\n");
 988         j = min(count, (size_t)(dev->rlen - dev->rpos));
 989         k = dev->rpos;
 990         if (k + j > 255)
 991                 j = 256 - k;
 992         DEBUGP(4, dev, "read1 j=%d\n", j);
 993         for (i = 0; i < j; i++) {
 994                 xoutb(k++, REG_BUF_ADDR(iobase));
 995                 dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
 996         }
 997         j = min(count, (size_t)(dev->rlen - dev->rpos));
 998         if (k + j > 255) {
 999                 DEBUGP(4, dev, "read2 j=%d\n", j);
1000                 dev->flags1 |= 0x10;    /* MSB buf addr set */
1001                 xoutb(dev->flags1, REG_FLAGS1(iobase));
1002                 for (; i < j; i++) {
1003                         xoutb(k++, REG_BUF_ADDR(iobase));
1004                         dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
1005                 }
1006         }
1007 
1008         if (dev->proto == 0 && count > dev->rlen - dev->rpos && i) {
1009                 DEBUGP(4, dev, "T=0 and count > buffer\n");
1010                 dev->rbuf[i] = dev->rbuf[i - 1];
1011                 dev->rbuf[i - 1] = dev->procbyte;
1012                 j++;
1013         }
1014         count = j;
1015 
1016         dev->rpos = dev->rlen + 1;
1017 
1018         /* Clear T1Active */
1019         DEBUGP(4, dev, "Clear T1Active\n");
1020         dev->flags1 &= 0xdf;
1021         xoutb(dev->flags1, REG_FLAGS1(iobase));
1022 
1023         xoutb(0, REG_FLAGS1(iobase));   /* clear detectCMM */
1024         /* last check before exit */
1025         if (!io_detect_cm4000(iobase, dev)) {
1026                 rc = -ENODEV;
1027                 goto release_io;
1028         }
1029 
1030         if (test_bit(IS_INVREV, &dev->flags) && count > 0)
1031                 str_invert_revert(dev->rbuf, count);
1032 
1033         if (copy_to_user(buf, dev->rbuf, count))
1034                 rc = -EFAULT;
1035 
1036 release_io:
1037         clear_bit(LOCK_IO, &dev->flags);
1038         wake_up_interruptible(&dev->ioq);
1039 
1040         DEBUGP(2, dev, "<- cmm_read returns: rc = %zi\n",
1041                (rc < 0 ? rc : count));
1042         return rc < 0 ? rc : count;
1043 }
1044 
1045 static ssize_t cmm_write(struct file *filp, const char __user *buf,
1046                          size_t count, loff_t *ppos)
1047 {
1048         struct cm4000_dev *dev = filp->private_data;
1049         unsigned int iobase = dev->p_dev->resource[0]->start;
1050         unsigned short s;
1051         unsigned char tmp;
1052         unsigned char infolen;
1053         unsigned char sendT0;
1054         unsigned short nsend;
1055         unsigned short nr;
1056         ssize_t rc;
1057         int i;
1058 
1059         DEBUGP(2, dev, "-> cmm_write(%s,%d)\n", current->comm, current->pid);
1060 
1061         if (count == 0)         /* according to manpage */
1062                 return 0;
1063 
1064         if (dev->proto == 0 && count < 4) {
1065                 /* T0 must have at least 4 bytes */
1066                 DEBUGP(4, dev, "T0 short write\n");
1067                 return -EIO;
1068         }
1069 
1070         nr = count & 0x1ff;     /* max bytes to write */
1071 
1072         sendT0 = dev->proto ? 0 : nr > 5 ? 0x08 : 0;
1073 
1074         if (!pcmcia_dev_present(dev->p_dev) || /* device removed */
1075             test_bit(IS_CMM_ABSENT, &dev->flags))
1076                 return -ENODEV;
1077 
1078         if (test_bit(IS_BAD_CSUM, &dev->flags)) {
1079                 DEBUGP(4, dev, "bad csum\n");
1080                 return -EIO;
1081         }
1082 
1083         /*
1084          * wait for atr to become valid.
1085          * note: it is important to lock this code. if we dont, the monitor
1086          * could be run between test_bit and the call to sleep on the
1087          * atr-queue.  if *then* the monitor detects atr valid, it will wake up
1088          * any process on the atr-queue, *but* since we have been interrupted,
1089          * we do not yet sleep on this queue. this would result in a missed
1090          * wake_up and the calling process would sleep forever (until
1091          * interrupted).  also, do *not* restore_flags before sleep_on, because
1092          * this could result in the same situation!
1093          */
1094         if (wait_event_interruptible
1095             (dev->atrq,
1096              ((filp->f_flags & O_NONBLOCK)
1097               || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
1098                 if (filp->f_flags & O_NONBLOCK)
1099                         return -EAGAIN;
1100                 return -ERESTARTSYS;
1101         }
1102 
1103         if (test_bit(IS_ATR_VALID, &dev->flags) == 0) { /* invalid atr */
1104                 DEBUGP(4, dev, "invalid ATR\n");
1105                 return -EIO;
1106         }
1107 
1108         /* lock io */
1109         if (wait_event_interruptible
1110             (dev->ioq,
1111              ((filp->f_flags & O_NONBLOCK)
1112               || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
1113                 if (filp->f_flags & O_NONBLOCK)
1114                         return -EAGAIN;
1115                 return -ERESTARTSYS;
1116         }
1117 
1118         if (copy_from_user(dev->sbuf, buf, ((count > 512) ? 512 : count)))
1119                 return -EFAULT;
1120 
1121         rc = 0;
1122         dev->flags0 = inb(REG_FLAGS0(iobase));
1123         if ((dev->flags0 & 1) == 0      /* no smartcard inserted */
1124             || dev->flags0 == 0xff) {   /* no cardman inserted */
1125                 clear_bit(IS_ATR_VALID, &dev->flags);
1126                 if (dev->flags0 & 1) {
1127                         set_bit(IS_CMM_ABSENT, &dev->flags);
1128                         rc = -ENODEV;
1129                 } else {
1130                         DEBUGP(4, dev, "IO error\n");
1131                         rc = -EIO;
1132                 }
1133                 goto release_io;
1134         }
1135 
1136         xoutb(0x80, REG_FLAGS0(iobase));        /* reset SM  */
1137 
1138         if (!io_detect_cm4000(iobase, dev)) {
1139                 rc = -ENODEV;
1140                 goto release_io;
1141         }
1142 
1143         /* reflect T=0 send/read mode in flags1 */
1144         dev->flags1 |= (sendT0);
1145 
1146         set_cardparameter(dev);
1147 
1148         /* dummy read, reset flag procedure received */
1149         tmp = inb(REG_FLAGS1(iobase));
1150 
1151         dev->flags1 = 0x20      /* T_Active */
1152             | (sendT0)
1153             | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)/* inverse parity  */
1154             | (((dev->baudv - 1) & 0x0100) >> 8);       /* MSB-Baud */
1155         DEBUGP(1, dev, "set dev->flags1 = 0x%.2x\n", dev->flags1);
1156         xoutb(dev->flags1, REG_FLAGS1(iobase));
1157 
1158         /* xmit data */
1159         DEBUGP(4, dev, "Xmit data\n");
1160         for (i = 0; i < nr; i++) {
1161                 if (i >= 256) {
1162                         dev->flags1 = 0x20      /* T_Active */
1163                             | (sendT0)  /* SendT0 */
1164                                 /* inverse parity: */
1165                             | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)
1166                             | (((dev->baudv - 1) & 0x0100) >> 8) /* MSB-Baud */
1167                             | 0x10;     /* set address high */
1168                         DEBUGP(4, dev, "dev->flags = 0x%.2x - set address "
1169                                "high\n", dev->flags1);
1170                         xoutb(dev->flags1, REG_FLAGS1(iobase));
1171                 }
1172                 if (test_bit(IS_INVREV, &dev->flags)) {
1173                         DEBUGP(4, dev, "Apply inverse convention for 0x%.2x "
1174                                 "-> 0x%.2x\n", (unsigned char)dev->sbuf[i],
1175                               invert_revert(dev->sbuf[i]));
1176                         xoutb(i, REG_BUF_ADDR(iobase));
1177                         xoutb(invert_revert(dev->sbuf[i]),
1178                               REG_BUF_DATA(iobase));
1179                 } else {
1180                         xoutb(i, REG_BUF_ADDR(iobase));
1181                         xoutb(dev->sbuf[i], REG_BUF_DATA(iobase));
1182                 }
1183         }
1184         DEBUGP(4, dev, "Xmit done\n");
1185 
1186         if (dev->proto == 0) {
1187                 /* T=0 proto: 0 byte reply  */
1188                 if (nr == 4) {
1189                         DEBUGP(4, dev, "T=0 assumes 0 byte reply\n");
1190                         xoutb(i, REG_BUF_ADDR(iobase));
1191                         if (test_bit(IS_INVREV, &dev->flags))
1192                                 xoutb(0xff, REG_BUF_DATA(iobase));
1193                         else
1194                                 xoutb(0x00, REG_BUF_DATA(iobase));
1195                 }
1196 
1197                 /* numSendBytes */
1198                 if (sendT0)
1199                         nsend = nr;
1200                 else {
1201                         if (nr == 4)
1202                                 nsend = 5;
1203                         else {
1204                                 nsend = 5 + (unsigned char)dev->sbuf[4];
1205                                 if (dev->sbuf[4] == 0)
1206                                         nsend += 0x100;
1207                         }
1208                 }
1209         } else
1210                 nsend = nr;
1211 
1212         /* T0: output procedure byte */
1213         if (test_bit(IS_INVREV, &dev->flags)) {
1214                 DEBUGP(4, dev, "T=0 set Procedure byte (inverse-reverse) "
1215                        "0x%.2x\n", invert_revert(dev->sbuf[1]));
1216                 xoutb(invert_revert(dev->sbuf[1]), REG_NUM_BYTES(iobase));
1217         } else {
1218                 DEBUGP(4, dev, "T=0 set Procedure byte 0x%.2x\n", dev->sbuf[1]);
1219                 xoutb(dev->sbuf[1], REG_NUM_BYTES(iobase));
1220         }
1221 
1222         DEBUGP(1, dev, "set NumSendBytes = 0x%.2x\n",
1223                (unsigned char)(nsend & 0xff));
1224         xoutb((unsigned char)(nsend & 0xff), REG_NUM_SEND(iobase));
1225 
1226         DEBUGP(1, dev, "Trigger CARDMAN CONTROLLER (0x%.2x)\n",
1227                0x40     /* SM_Active */
1228               | (dev->flags0 & 2 ? 0 : 4)       /* power on if needed */
1229               |(dev->proto ? 0x10 : 0x08)       /* T=1/T=0 */
1230               |(nsend & 0x100) >> 8 /* MSB numSendBytes */ );
1231         xoutb(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               REG_FLAGS0(iobase));
1236 
1237         /* wait for xmit done */
1238         if (dev->proto == 1) {
1239                 DEBUGP(4, dev, "Wait for xmit done\n");
1240                 for (i = 0; i < 1000; i++) {
1241                         if (inb(REG_FLAGS0(iobase)) & 0x08)
1242                                 break;
1243                         msleep_interruptible(10);
1244                 }
1245                 if (i == 1000) {
1246                         DEBUGP(4, dev, "timeout waiting for xmit done\n");
1247                         rc = -EIO;
1248                         goto release_io;
1249                 }
1250         }
1251 
1252         /* T=1: wait for infoLen */
1253 
1254         infolen = 0;
1255         if (dev->proto) {
1256                 /* wait until infoLen is valid */
1257                 for (i = 0; i < 6000; i++) {    /* max waiting time of 1 min */
1258                         io_read_num_rec_bytes(iobase, &s);
1259                         if (s >= 3) {
1260                                 infolen = inb(REG_FLAGS1(iobase));
1261                                 DEBUGP(4, dev, "infolen=%d\n", infolen);
1262                                 break;
1263                         }
1264                         msleep_interruptible(10);
1265                 }
1266                 if (i == 6000) {
1267                         DEBUGP(4, dev, "timeout waiting for infoLen\n");
1268                         rc = -EIO;
1269                         goto release_io;
1270                 }
1271         } else
1272                 clear_bit(IS_PROCBYTE_PRESENT, &dev->flags);
1273 
1274         /* numRecBytes | bit9 of numRecytes */
1275         io_read_num_rec_bytes(iobase, &dev->rlen);
1276         for (i = 0; i < 600; i++) {     /* max waiting time of 2 sec */
1277                 if (dev->proto) {
1278                         if (dev->rlen >= infolen + 4)
1279                                 break;
1280                 }
1281                 msleep_interruptible(10);
1282                 /* numRecBytes | bit9 of numRecytes */
1283                 io_read_num_rec_bytes(iobase, &s);
1284                 if (s > dev->rlen) {
1285                         DEBUGP(1, dev, "NumRecBytes inc (reset timeout)\n");
1286                         i = 0;  /* reset timeout */
1287                         dev->rlen = s;
1288                 }
1289                 /* T=0: we are done when numRecBytes doesn't
1290                  *      increment any more and NoProcedureByte
1291                  *      is set and numRecBytes == bytes sent + 6
1292                  *      (header bytes + data + 1 for sw2)
1293                  *      except when the card replies an error
1294                  *      which means, no data will be sent back.
1295                  */
1296                 else if (dev->proto == 0) {
1297                         if ((inb(REG_BUF_ADDR(iobase)) & 0x80)) {
1298                                 /* no procedure byte received since last read */
1299                                 DEBUGP(1, dev, "NoProcedure byte set\n");
1300                                 /* i=0; */
1301                         } else {
1302                                 /* procedure byte received since last read */
1303                                 DEBUGP(1, dev, "NoProcedure byte unset "
1304                                         "(reset timeout)\n");
1305                                 dev->procbyte = inb(REG_FLAGS1(iobase));
1306                                 DEBUGP(1, dev, "Read procedure byte 0x%.2x\n",
1307                                       dev->procbyte);
1308                                 i = 0;  /* resettimeout */
1309                         }
1310                         if (inb(REG_FLAGS0(iobase)) & 0x08) {
1311                                 DEBUGP(1, dev, "T0Done flag (read reply)\n");
1312                                 break;
1313                         }
1314                 }
1315                 if (dev->proto)
1316                         infolen = inb(REG_FLAGS1(iobase));
1317         }
1318         if (i == 600) {
1319                 DEBUGP(1, dev, "timeout waiting for numRecBytes\n");
1320                 rc = -EIO;
1321                 goto release_io;
1322         } else {
1323                 if (dev->proto == 0) {
1324                         DEBUGP(1, dev, "Wait for T0Done bit to be  set\n");
1325                         for (i = 0; i < 1000; i++) {
1326                                 if (inb(REG_FLAGS0(iobase)) & 0x08)
1327                                         break;
1328                                 msleep_interruptible(10);
1329                         }
1330                         if (i == 1000) {
1331                                 DEBUGP(1, dev, "timeout waiting for T0Done\n");
1332                                 rc = -EIO;
1333                                 goto release_io;
1334                         }
1335 
1336                         dev->procbyte = inb(REG_FLAGS1(iobase));
1337                         DEBUGP(4, dev, "Read procedure byte 0x%.2x\n",
1338                               dev->procbyte);
1339 
1340                         io_read_num_rec_bytes(iobase, &dev->rlen);
1341                         DEBUGP(4, dev, "Read NumRecBytes = %i\n", dev->rlen);
1342 
1343                 }
1344         }
1345         /* T=1: read offset=zero, T=0: read offset=after challenge */
1346         dev->rpos = dev->proto ? 0 : nr == 4 ? 5 : nr > dev->rlen ? 5 : nr;
1347         DEBUGP(4, dev, "dev->rlen = %i,  dev->rpos = %i, nr = %i\n",
1348               dev->rlen, dev->rpos, nr);
1349 
1350 release_io:
1351         DEBUGP(4, dev, "Reset SM\n");
1352         xoutb(0x80, REG_FLAGS0(iobase));        /* reset SM */
1353 
1354         if (rc < 0) {
1355                 DEBUGP(4, dev, "Write failed but clear T_Active\n");
1356                 dev->flags1 &= 0xdf;
1357                 xoutb(dev->flags1, REG_FLAGS1(iobase));
1358         }
1359 
1360         clear_bit(LOCK_IO, &dev->flags);
1361         wake_up_interruptible(&dev->ioq);
1362         wake_up_interruptible(&dev->readq);     /* tell read we have data */
1363 
1364         /* ITSEC E2: clear write buffer */
1365         memset((char *)dev->sbuf, 0, 512);
1366 
1367         /* return error or actually written bytes */
1368         DEBUGP(2, dev, "<- cmm_write\n");
1369         return rc < 0 ? rc : nr;
1370 }
1371 
1372 static void start_monitor(struct cm4000_dev *dev)
1373 {
1374         DEBUGP(3, dev, "-> start_monitor\n");
1375         if (!dev->monitor_running) {
1376                 DEBUGP(5, dev, "create, init and add timer\n");
1377                 timer_setup(&dev->timer, monitor_card, 0);
1378                 dev->monitor_running = 1;
1379                 mod_timer(&dev->timer, jiffies);
1380         } else
1381                 DEBUGP(5, dev, "monitor already running\n");
1382         DEBUGP(3, dev, "<- start_monitor\n");
1383 }
1384 
1385 static void stop_monitor(struct cm4000_dev *dev)
1386 {
1387         DEBUGP(3, dev, "-> stop_monitor\n");
1388         if (dev->monitor_running) {
1389                 DEBUGP(5, dev, "stopping monitor\n");
1390                 terminate_monitor(dev);
1391                 /* reset monitor SM */
1392                 clear_bit(IS_ATR_VALID, &dev->flags);
1393                 clear_bit(IS_ATR_PRESENT, &dev->flags);
1394         } else
1395                 DEBUGP(5, dev, "monitor already stopped\n");
1396         DEBUGP(3, dev, "<- stop_monitor\n");
1397 }
1398 
1399 static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1400 {
1401         struct cm4000_dev *dev = filp->private_data;
1402         unsigned int iobase = dev->p_dev->resource[0]->start;
1403         struct inode *inode = file_inode(filp);
1404         struct pcmcia_device *link;
1405         int size;
1406         int rc;
1407         void __user *argp = (void __user *)arg;
1408 #ifdef CM4000_DEBUG
1409         char *ioctl_names[CM_IOC_MAXNR + 1] = {
1410                 [_IOC_NR(CM_IOCGSTATUS)] "CM_IOCGSTATUS",
1411                 [_IOC_NR(CM_IOCGATR)] "CM_IOCGATR",
1412                 [_IOC_NR(CM_IOCARDOFF)] "CM_IOCARDOFF",
1413                 [_IOC_NR(CM_IOCSPTS)] "CM_IOCSPTS",
1414                 [_IOC_NR(CM_IOSDBGLVL)] "CM4000_DBGLVL",
1415         };
1416         DEBUGP(3, dev, "cmm_ioctl(device=%d.%d) %s\n", imajor(inode),
1417                iminor(inode), ioctl_names[_IOC_NR(cmd)]);
1418 #endif
1419 
1420         mutex_lock(&cmm_mutex);
1421         rc = -ENODEV;
1422         link = dev_table[iminor(inode)];
1423         if (!pcmcia_dev_present(link)) {
1424                 DEBUGP(4, dev, "DEV_OK false\n");
1425                 goto out;
1426         }
1427 
1428         if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
1429                 DEBUGP(4, dev, "CMM_ABSENT flag set\n");
1430                 goto out;
1431         }
1432         rc = -EINVAL;
1433 
1434         if (_IOC_TYPE(cmd) != CM_IOC_MAGIC) {
1435                 DEBUGP(4, dev, "ioctype mismatch\n");
1436                 goto out;
1437         }
1438         if (_IOC_NR(cmd) > CM_IOC_MAXNR) {
1439                 DEBUGP(4, dev, "iocnr mismatch\n");
1440                 goto out;
1441         }
1442         size = _IOC_SIZE(cmd);
1443         rc = -EFAULT;
1444         DEBUGP(4, dev, "iocdir=%.4x iocr=%.4x iocw=%.4x iocsize=%d cmd=%.4x\n",
1445               _IOC_DIR(cmd), _IOC_READ, _IOC_WRITE, size, cmd);
1446 
1447         if (_IOC_DIR(cmd) & _IOC_READ) {
1448                 if (!access_ok(argp, size))
1449                         goto out;
1450         }
1451         if (_IOC_DIR(cmd) & _IOC_WRITE) {
1452                 if (!access_ok(argp, size))
1453                         goto out;
1454         }
1455         rc = 0;
1456 
1457         switch (cmd) {
1458         case CM_IOCGSTATUS:
1459                 DEBUGP(4, dev, " ... in CM_IOCGSTATUS\n");
1460                 {
1461                         int status;
1462 
1463                         /* clear other bits, but leave inserted & powered as
1464                          * they are */
1465                         status = dev->flags0 & 3;
1466                         if (test_bit(IS_ATR_PRESENT, &dev->flags))
1467                                 status |= CM_ATR_PRESENT;
1468                         if (test_bit(IS_ATR_VALID, &dev->flags))
1469                                 status |= CM_ATR_VALID;
1470                         if (test_bit(IS_CMM_ABSENT, &dev->flags))
1471                                 status |= CM_NO_READER;
1472                         if (test_bit(IS_BAD_CARD, &dev->flags))
1473                                 status |= CM_BAD_CARD;
1474                         if (copy_to_user(argp, &status, sizeof(int)))
1475                                 rc = -EFAULT;
1476                 }
1477                 break;
1478         case CM_IOCGATR:
1479                 DEBUGP(4, dev, "... in CM_IOCGATR\n");
1480                 {
1481                         struct atreq __user *atreq = argp;
1482                         int tmp;
1483                         /* allow nonblocking io and being interrupted */
1484                         if (wait_event_interruptible
1485                             (dev->atrq,
1486                              ((filp->f_flags & O_NONBLOCK)
1487                               || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
1488                                   != 0)))) {
1489                                 if (filp->f_flags & O_NONBLOCK)
1490                                         rc = -EAGAIN;
1491                                 else
1492                                         rc = -ERESTARTSYS;
1493                                 break;
1494                         }
1495 
1496                         rc = -EFAULT;
1497                         if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {
1498                                 tmp = -1;
1499                                 if (copy_to_user(&(atreq->atr_len), &tmp,
1500                                                  sizeof(int)))
1501                                         break;
1502                         } else {
1503                                 if (copy_to_user(atreq->atr, dev->atr,
1504                                                  dev->atr_len))
1505                                         break;
1506 
1507                                 tmp = dev->atr_len;
1508                                 if (copy_to_user(&(atreq->atr_len), &tmp, sizeof(int)))
1509                                         break;
1510                         }
1511                         rc = 0;
1512                         break;
1513                 }
1514         case CM_IOCARDOFF:
1515 
1516 #ifdef CM4000_DEBUG
1517                 DEBUGP(4, dev, "... in CM_IOCARDOFF\n");
1518                 if (dev->flags0 & 0x01) {
1519                         DEBUGP(4, dev, "    Card inserted\n");
1520                 } else {
1521                         DEBUGP(2, dev, "    No card inserted\n");
1522                 }
1523                 if (dev->flags0 & 0x02) {
1524                         DEBUGP(4, dev, "    Card powered\n");
1525                 } else {
1526                         DEBUGP(2, dev, "    Card not powered\n");
1527                 }
1528 #endif
1529 
1530                 /* is a card inserted and powered? */
1531                 if ((dev->flags0 & 0x01) && (dev->flags0 & 0x02)) {
1532 
1533                         /* get IO lock */
1534                         if (wait_event_interruptible
1535                             (dev->ioq,
1536                              ((filp->f_flags & O_NONBLOCK)
1537                               || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
1538                                   == 0)))) {
1539                                 if (filp->f_flags & O_NONBLOCK)
1540                                         rc = -EAGAIN;
1541                                 else
1542                                         rc = -ERESTARTSYS;
1543                                 break;
1544                         }
1545                         /* Set Flags0 = 0x42 */
1546                         DEBUGP(4, dev, "Set Flags0=0x42 \n");
1547                         xoutb(0x42, REG_FLAGS0(iobase));
1548                         clear_bit(IS_ATR_PRESENT, &dev->flags);
1549                         clear_bit(IS_ATR_VALID, &dev->flags);
1550                         dev->mstate = M_CARDOFF;
1551                         clear_bit(LOCK_IO, &dev->flags);
1552                         if (wait_event_interruptible
1553                             (dev->atrq,
1554                              ((filp->f_flags & O_NONBLOCK)
1555                               || (test_bit(IS_ATR_VALID, (void *)&dev->flags) !=
1556                                   0)))) {
1557                                 if (filp->f_flags & O_NONBLOCK)
1558                                         rc = -EAGAIN;
1559                                 else
1560                                         rc = -ERESTARTSYS;
1561                                 break;
1562                         }
1563                 }
1564                 /* release lock */
1565                 clear_bit(LOCK_IO, &dev->flags);
1566                 wake_up_interruptible(&dev->ioq);
1567 
1568                 rc = 0;
1569                 break;
1570         case CM_IOCSPTS:
1571                 {
1572                         struct ptsreq krnptsreq;
1573 
1574                         if (copy_from_user(&krnptsreq, argp,
1575                                            sizeof(struct ptsreq))) {
1576                                 rc = -EFAULT;
1577                                 break;
1578                         }
1579 
1580                         rc = 0;
1581                         DEBUGP(4, dev, "... in CM_IOCSPTS\n");
1582                         /* wait for ATR to get valid */
1583                         if (wait_event_interruptible
1584                             (dev->atrq,
1585                              ((filp->f_flags & O_NONBLOCK)
1586                               || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
1587                                   != 0)))) {
1588                                 if (filp->f_flags & O_NONBLOCK)
1589                                         rc = -EAGAIN;
1590                                 else
1591                                         rc = -ERESTARTSYS;
1592                                 break;
1593                         }
1594                         /* get IO lock */
1595                         if (wait_event_interruptible
1596                             (dev->ioq,
1597                              ((filp->f_flags & O_NONBLOCK)
1598                               || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
1599                                   == 0)))) {
1600                                 if (filp->f_flags & O_NONBLOCK)
1601                                         rc = -EAGAIN;
1602                                 else
1603                                         rc = -ERESTARTSYS;
1604                                 break;
1605                         }
1606 
1607                         if ((rc = set_protocol(dev, &krnptsreq)) != 0) {
1608                                 /* auto power_on again */
1609                                 dev->mstate = M_FETCH_ATR;
1610                                 clear_bit(IS_ATR_VALID, &dev->flags);
1611                         }
1612                         /* release lock */
1613                         clear_bit(LOCK_IO, &dev->flags);
1614                         wake_up_interruptible(&dev->ioq);
1615 
1616                 }
1617                 break;
1618 #ifdef CM4000_DEBUG
1619         case CM_IOSDBGLVL:
1620                 rc = -ENOTTY;
1621                 break;
1622 #endif
1623         default:
1624                 DEBUGP(4, dev, "... in default (unknown IOCTL code)\n");
1625                 rc = -ENOTTY;
1626         }
1627 out:
1628         mutex_unlock(&cmm_mutex);
1629         return rc;
1630 }
1631 
1632 static int cmm_open(struct inode *inode, struct file *filp)
1633 {
1634         struct cm4000_dev *dev;
1635         struct pcmcia_device *link;
1636         int minor = iminor(inode);
1637         int ret;
1638 
1639         if (minor >= CM4000_MAX_DEV)
1640                 return -ENODEV;
1641 
1642         mutex_lock(&cmm_mutex);
1643         link = dev_table[minor];
1644         if (link == NULL || !pcmcia_dev_present(link)) {
1645                 ret = -ENODEV;
1646                 goto out;
1647         }
1648 
1649         if (link->open) {
1650                 ret = -EBUSY;
1651                 goto out;
1652         }
1653 
1654         dev = link->priv;
1655         filp->private_data = dev;
1656 
1657         DEBUGP(2, dev, "-> cmm_open(device=%d.%d process=%s,%d)\n",
1658               imajor(inode), minor, current->comm, current->pid);
1659 
1660         /* init device variables, they may be "polluted" after close
1661          * or, the device may never have been closed (i.e. open failed)
1662          */
1663 
1664         ZERO_DEV(dev);
1665 
1666         /* opening will always block since the
1667          * monitor will be started by open, which
1668          * means we have to wait for ATR becoming
1669          * valid = block until valid (or card
1670          * inserted)
1671          */
1672         if (filp->f_flags & O_NONBLOCK) {
1673                 ret = -EAGAIN;
1674                 goto out;
1675         }
1676 
1677         dev->mdelay = T_50MSEC;
1678 
1679         /* start monitoring the cardstatus */
1680         start_monitor(dev);
1681 
1682         link->open = 1;         /* only one open per device */
1683 
1684         DEBUGP(2, dev, "<- cmm_open\n");
1685         ret = stream_open(inode, filp);
1686 out:
1687         mutex_unlock(&cmm_mutex);
1688         return ret;
1689 }
1690 
1691 static int cmm_close(struct inode *inode, struct file *filp)
1692 {
1693         struct cm4000_dev *dev;
1694         struct pcmcia_device *link;
1695         int minor = iminor(inode);
1696 
1697         if (minor >= CM4000_MAX_DEV)
1698                 return -ENODEV;
1699 
1700         link = dev_table[minor];
1701         if (link == NULL)
1702                 return -ENODEV;
1703 
1704         dev = link->priv;
1705 
1706         DEBUGP(2, dev, "-> cmm_close(maj/min=%d.%d)\n",
1707                imajor(inode), minor);
1708 
1709         stop_monitor(dev);
1710 
1711         ZERO_DEV(dev);
1712 
1713         link->open = 0;         /* only one open per device */
1714         wake_up(&dev->devq);    /* socket removed? */
1715 
1716         DEBUGP(2, dev, "cmm_close\n");
1717         return 0;
1718 }
1719 
1720 static void cmm_cm4000_release(struct pcmcia_device * link)
1721 {
1722         struct cm4000_dev *dev = link->priv;
1723 
1724         /* dont terminate the monitor, rather rely on
1725          * close doing that for us.
1726          */
1727         DEBUGP(3, dev, "-> cmm_cm4000_release\n");
1728         while (link->open) {
1729                 printk(KERN_INFO MODULE_NAME ": delaying release until "
1730                        "process has terminated\n");
1731                 /* note: don't interrupt us:
1732                  * close the applications which own
1733                  * the devices _first_ !
1734                  */
1735                 wait_event(dev->devq, (link->open == 0));
1736         }
1737         /* dev->devq=NULL;      this cannot be zeroed earlier */
1738         DEBUGP(3, dev, "<- cmm_cm4000_release\n");
1739         return;
1740 }
1741 
1742 /*==== Interface to PCMCIA Layer =======================================*/
1743 
1744 static int cm4000_config_check(struct pcmcia_device *p_dev, void *priv_data)
1745 {
1746         return pcmcia_request_io(p_dev);
1747 }
1748 
1749 static int cm4000_config(struct pcmcia_device * link, int devno)
1750 {
1751         link->config_flags |= CONF_AUTO_SET_IO;
1752 
1753         /* read the config-tuples */
1754         if (pcmcia_loop_config(link, cm4000_config_check, NULL))
1755                 goto cs_release;
1756 
1757         if (pcmcia_enable_device(link))
1758                 goto cs_release;
1759 
1760         return 0;
1761 
1762 cs_release:
1763         cm4000_release(link);
1764         return -ENODEV;
1765 }
1766 
1767 static int cm4000_suspend(struct pcmcia_device *link)
1768 {
1769         struct cm4000_dev *dev;
1770 
1771         dev = link->priv;
1772         stop_monitor(dev);
1773 
1774         return 0;
1775 }
1776 
1777 static int cm4000_resume(struct pcmcia_device *link)
1778 {
1779         struct cm4000_dev *dev;
1780 
1781         dev = link->priv;
1782         if (link->open)
1783                 start_monitor(dev);
1784 
1785         return 0;
1786 }
1787 
1788 static void cm4000_release(struct pcmcia_device *link)
1789 {
1790         cmm_cm4000_release(link);       /* delay release until device closed */
1791         pcmcia_disable_device(link);
1792 }
1793 
1794 static int cm4000_probe(struct pcmcia_device *link)
1795 {
1796         struct cm4000_dev *dev;
1797         int i, ret;
1798 
1799         for (i = 0; i < CM4000_MAX_DEV; i++)
1800                 if (dev_table[i] == NULL)
1801                         break;
1802 
1803         if (i == CM4000_MAX_DEV) {
1804                 printk(KERN_NOTICE MODULE_NAME ": all devices in use\n");
1805                 return -ENODEV;
1806         }
1807 
1808         /* create a new cm4000_cs device */
1809         dev = kzalloc(sizeof(struct cm4000_dev), GFP_KERNEL);
1810         if (dev == NULL)
1811                 return -ENOMEM;
1812 
1813         dev->p_dev = link;
1814         link->priv = dev;
1815         dev_table[i] = link;
1816 
1817         init_waitqueue_head(&dev->devq);
1818         init_waitqueue_head(&dev->ioq);
1819         init_waitqueue_head(&dev->atrq);
1820         init_waitqueue_head(&dev->readq);
1821 
1822         ret = cm4000_config(link, i);
1823         if (ret) {
1824                 dev_table[i] = NULL;
1825                 kfree(dev);
1826                 return ret;
1827         }
1828 
1829         device_create(cmm_class, NULL, MKDEV(major, i), NULL, "cmm%d", i);
1830 
1831         return 0;
1832 }
1833 
1834 static void cm4000_detach(struct pcmcia_device *link)
1835 {
1836         struct cm4000_dev *dev = link->priv;
1837         int devno;
1838 
1839         /* find device */
1840         for (devno = 0; devno < CM4000_MAX_DEV; devno++)
1841                 if (dev_table[devno] == link)
1842                         break;
1843         if (devno == CM4000_MAX_DEV)
1844                 return;
1845 
1846         stop_monitor(dev);
1847 
1848         cm4000_release(link);
1849 
1850         dev_table[devno] = NULL;
1851         kfree(dev);
1852 
1853         device_destroy(cmm_class, MKDEV(major, devno));
1854 
1855         return;
1856 }
1857 
1858 static const struct file_operations cm4000_fops = {
1859         .owner  = THIS_MODULE,
1860         .read   = cmm_read,
1861         .write  = cmm_write,
1862         .unlocked_ioctl = cmm_ioctl,
1863         .open   = cmm_open,
1864         .release= cmm_close,
1865         .llseek = no_llseek,
1866 };
1867 
1868 static const struct pcmcia_device_id cm4000_ids[] = {
1869         PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0002),
1870         PCMCIA_DEVICE_PROD_ID12("CardMan", "4000", 0x2FB368CA, 0xA2BD8C39),
1871         PCMCIA_DEVICE_NULL,
1872 };
1873 MODULE_DEVICE_TABLE(pcmcia, cm4000_ids);
1874 
1875 static struct pcmcia_driver cm4000_driver = {
1876         .owner    = THIS_MODULE,
1877         .name     = "cm4000_cs",
1878         .probe    = cm4000_probe,
1879         .remove   = cm4000_detach,
1880         .suspend  = cm4000_suspend,
1881         .resume   = cm4000_resume,
1882         .id_table = cm4000_ids,
1883 };
1884 
1885 static int __init cmm_init(void)
1886 {
1887         int rc;
1888 
1889         cmm_class = class_create(THIS_MODULE, "cardman_4000");
1890         if (IS_ERR(cmm_class))
1891                 return PTR_ERR(cmm_class);
1892 
1893         major = register_chrdev(0, DEVICE_NAME, &cm4000_fops);
1894         if (major < 0) {
1895                 printk(KERN_WARNING MODULE_NAME
1896                         ": could not get major number\n");
1897                 class_destroy(cmm_class);
1898                 return major;
1899         }
1900 
1901         rc = pcmcia_register_driver(&cm4000_driver);
1902         if (rc < 0) {
1903                 unregister_chrdev(major, DEVICE_NAME);
1904                 class_destroy(cmm_class);
1905                 return rc;
1906         }
1907 
1908         return 0;
1909 }
1910 
1911 static void __exit cmm_exit(void)
1912 {
1913         pcmcia_unregister_driver(&cm4000_driver);
1914         unregister_chrdev(major, DEVICE_NAME);
1915         class_destroy(cmm_class);
1916 };
1917 
1918 module_init(cmm_init);
1919 module_exit(cmm_exit);
1920 MODULE_LICENSE("Dual BSD/GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/char/pcmcia/cm4000_cs.c

DEFINITIONS
