drivers/bluetooth/bt3c_cs.c

   1 /*
   2  *
   3  *  Driver for the 3Com Bluetooth PCMCIA card
   4  *
   5  *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
   6  *                           Jose Orlando Pereira <jop@di.uminho.pt>
   7  *
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License version 2 as
  11  *  published by the Free Software Foundation;
  12  *
  13  *  Software distributed under the License is distributed on an "AS
  14  *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  15  *  implied. See the License for the specific language governing
  16  *  rights and limitations under the License.
  17  *
  18  *  The initial developer of the original code is David A. Hinds
  19  *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  20  *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  21  *
  22  */
  23
  24 #include <linux/module.h>
  25
  26 #include <linux/kernel.h>
  27 #include <linux/init.h>
  28 #include <linux/slab.h>
  29 #include <linux/types.h>
  30 #include <linux/delay.h>
  31 #include <linux/errno.h>
  32 #include <linux/ptrace.h>
  33 #include <linux/ioport.h>
  34 #include <linux/spinlock.h>
  35 #include <linux/moduleparam.h>
  36
  37 #include <linux/skbuff.h>
  38 #include <linux/string.h>
  39 #include <linux/serial.h>
  40 #include <linux/serial_reg.h>
  41 #include <linux/bitops.h>
  42 #include <asm/io.h>
  43
  44 #include <linux/device.h>
  45 #include <linux/firmware.h>
  46
  47 #include <pcmcia/cistpl.h>
  48 #include <pcmcia/ciscode.h>
  49 #include <pcmcia/ds.h>
  50 #include <pcmcia/cisreg.h>
  51
  52 #include <net/bluetooth/bluetooth.h>
  53 #include <net/bluetooth/hci_core.h>
  54
  55
  56
  57 /* ======================== Module parameters ======================== */
  58
  59
  60 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
  61 MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
  62 MODULE_LICENSE("GPL");
  63 MODULE_FIRMWARE("BT3CPCC.bin");
  64
  65
  66
  67 /* ======================== Local structures ======================== */
  68
  69
  70 typedef struct bt3c_info_t {
  71         struct pcmcia_device *p_dev;
  72
  73         struct hci_dev *hdev;
  74
  75         spinlock_t lock;                /* For serializing operations */
  76
  77         struct sk_buff_head txq;
  78         unsigned long tx_state;
  79
  80         unsigned long rx_state;
  81         unsigned long rx_count;
  82         struct sk_buff *rx_skb;
  83 } bt3c_info_t;
  84
  85
  86 static int bt3c_config(struct pcmcia_device *link);
  87 static void bt3c_release(struct pcmcia_device *link);
  88
  89 static void bt3c_detach(struct pcmcia_device *p_dev);
  90
  91
  92 /* Transmit states  */
  93 #define XMIT_SENDING  1
  94 #define XMIT_WAKEUP   2
  95 #define XMIT_WAITING  8
  96
  97 /* Receiver states */
  98 #define RECV_WAIT_PACKET_TYPE   0
  99 #define RECV_WAIT_EVENT_HEADER  1
 100 #define RECV_WAIT_ACL_HEADER    2
 101 #define RECV_WAIT_SCO_HEADER    3
 102 #define RECV_WAIT_DATA          4
 103
 104
 105
 106 /* ======================== Special I/O functions ======================== */
 107
 108
 109 #define DATA_L   0
 110 #define DATA_H   1
 111 #define ADDR_L   2
 112 #define ADDR_H   3
 113 #define CONTROL  4
 114
 115
 116 static inline void bt3c_address(unsigned int iobase, unsigned short addr)
 117 {
 118         outb(addr & 0xff, iobase + ADDR_L);
 119         outb((addr >> 8) & 0xff, iobase + ADDR_H);
 120 }
 121
 122
 123 static inline void bt3c_put(unsigned int iobase, unsigned short value)
 124 {
 125         outb(value & 0xff, iobase + DATA_L);
 126         outb((value >> 8) & 0xff, iobase + DATA_H);
 127 }
 128
 129
 130 static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
 131 {
 132         bt3c_address(iobase, addr);
 133         bt3c_put(iobase, value);
 134 }
 135
 136
 137 static inline unsigned short bt3c_get(unsigned int iobase)
 138 {
 139         unsigned short value = inb(iobase + DATA_L);
 140
 141         value |= inb(iobase + DATA_H) << 8;
 142
 143         return value;
 144 }
 145
 146
 147 static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
 148 {
 149         bt3c_address(iobase, addr);
 150
 151         return bt3c_get(iobase);
 152 }
 153
 154
 155
 156 /* ======================== Interrupt handling ======================== */
 157
 158
 159 static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
 160 {
 161         int actual = 0;
 162
 163         bt3c_address(iobase, 0x7080);
 164
 165         /* Fill FIFO with current frame */
 166         while (actual < len) {
 167                 /* Transmit next byte */
 168                 bt3c_put(iobase, buf[actual]);
 169                 actual++;
 170         }
 171
 172         bt3c_io_write(iobase, 0x7005, actual);
 173
 174         return actual;
 175 }
 176
 177
 178 static void bt3c_write_wakeup(bt3c_info_t *info)
 179 {
 180         if (!info) {
 181                 BT_ERR("Unknown device");
 182                 return;
 183         }
 184
 185         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
 186                 return;
 187
 188         do {
 189                 unsigned int iobase = info->p_dev->resource[0]->start;
 190                 register struct sk_buff *skb;
 191                 int len;
 192
 193                 if (!pcmcia_dev_present(info->p_dev))
 194                         break;
 195
 196                 skb = skb_dequeue(&(info->txq));
 197                 if (!skb) {
 198                         clear_bit(XMIT_SENDING, &(info->tx_state));
 199                         break;
 200                 }
 201
 202                 /* Send frame */
 203                 len = bt3c_write(iobase, 256, skb->data, skb->len);
 204
 205                 if (len != skb->len) {
 206                         BT_ERR("Very strange");
 207                 }
 208
 209                 kfree_skb(skb);
 210
 211                 info->hdev->stat.byte_tx += len;
 212
 213         } while (0);
 214 }
 215
 216
 217 static void bt3c_receive(bt3c_info_t *info)
 218 {
 219         unsigned int iobase;
 220         int size = 0, avail;
 221
 222         if (!info) {
 223                 BT_ERR("Unknown device");
 224                 return;
 225         }
 226
 227         iobase = info->p_dev->resource[0]->start;
 228
 229         avail = bt3c_read(iobase, 0x7006);
 230         //printk("bt3c_cs: receiving %d bytes\n", avail);
 231
 232         bt3c_address(iobase, 0x7480);
 233         while (size < avail) {
 234                 size++;
 235                 info->hdev->stat.byte_rx++;
 236
 237                 /* Allocate packet */
 238                 if (info->rx_skb == NULL) {
 239                         info->rx_state = RECV_WAIT_PACKET_TYPE;
 240                         info->rx_count = 0;
 241                         info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
 242                         if (!info->rx_skb) {
 243                                 BT_ERR("Can't allocate mem for new packet");
 244                                 return;
 245                         }
 246                 }
 247
 248
 249                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
 250
 251                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
 252                         inb(iobase + DATA_H);
 253                         //printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type);
 254
 255                         switch (bt_cb(info->rx_skb)->pkt_type) {
 256
 257                         case HCI_EVENT_PKT:
 258                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
 259                                 info->rx_count = HCI_EVENT_HDR_SIZE;
 260                                 break;
 261
 262                         case HCI_ACLDATA_PKT:
 263                                 info->rx_state = RECV_WAIT_ACL_HEADER;
 264                                 info->rx_count = HCI_ACL_HDR_SIZE;
 265                                 break;
 266
 267                         case HCI_SCODATA_PKT:
 268                                 info->rx_state = RECV_WAIT_SCO_HEADER;
 269                                 info->rx_count = HCI_SCO_HDR_SIZE;
 270                                 break;
 271
 272                         default:
 273                                 /* Unknown packet */
 274                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
 275                                 info->hdev->stat.err_rx++;
 276                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
 277
 278                                 kfree_skb(info->rx_skb);
 279                                 info->rx_skb = NULL;
 280                                 break;
 281
 282                         }
 283
 284                 } else {
 285
 286                         __u8 x = inb(iobase + DATA_L);
 287
 288                         *skb_put(info->rx_skb, 1) = x;
 289                         inb(iobase + DATA_H);
 290                         info->rx_count--;
 291
 292                         if (info->rx_count == 0) {
 293
 294                                 int dlen;
 295                                 struct hci_event_hdr *eh;
 296                                 struct hci_acl_hdr *ah;
 297                                 struct hci_sco_hdr *sh;
 298
 299                                 switch (info->rx_state) {
 300
 301                                 case RECV_WAIT_EVENT_HEADER:
 302                                         eh = hci_event_hdr(info->rx_skb);
 303                                         info->rx_state = RECV_WAIT_DATA;
 304                                         info->rx_count = eh->plen;
 305                                         break;
 306
 307                                 case RECV_WAIT_ACL_HEADER:
 308                                         ah = hci_acl_hdr(info->rx_skb);
 309                                         dlen = __le16_to_cpu(ah->dlen);
 310                                         info->rx_state = RECV_WAIT_DATA;
 311                                         info->rx_count = dlen;
 312                                         break;
 313
 314                                 case RECV_WAIT_SCO_HEADER:
 315                                         sh = hci_sco_hdr(info->rx_skb);
 316                                         info->rx_state = RECV_WAIT_DATA;
 317                                         info->rx_count = sh->dlen;
 318                                         break;
 319
 320                                 case RECV_WAIT_DATA:
 321                                         hci_recv_frame(info->hdev, info->rx_skb);
 322                                         info->rx_skb = NULL;
 323                                         break;
 324
 325                                 }
 326
 327                         }
 328
 329                 }
 330
 331         }
 332
 333         bt3c_io_write(iobase, 0x7006, 0x0000);
 334 }
 335
 336
 337 static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
 338 {
 339         bt3c_info_t *info = dev_inst;
 340         unsigned int iobase;
 341         int iir;
 342         irqreturn_t r = IRQ_NONE;
 343
 344         if (!info || !info->hdev)
 345                 /* our irq handler is shared */
 346                 return IRQ_NONE;
 347
 348         iobase = info->p_dev->resource[0]->start;
 349
 350         spin_lock(&(info->lock));
 351
 352         iir = inb(iobase + CONTROL);
 353         if (iir & 0x80) {
 354                 int stat = bt3c_read(iobase, 0x7001);
 355
 356                 if ((stat & 0xff) == 0x7f) {
 357                         BT_ERR("Very strange (stat=0x%04x)", stat);
 358                 } else if ((stat & 0xff) != 0xff) {
 359                         if (stat & 0x0020) {
 360                                 int status = bt3c_read(iobase, 0x7002) & 0x10;
 361                                 BT_INFO("%s: Antenna %s", info->hdev->name,
 362                                                         status ? "out" : "in");
 363                         }
 364                         if (stat & 0x0001)
 365                                 bt3c_receive(info);
 366                         if (stat & 0x0002) {
 367                                 //BT_ERR("Ack (stat=0x%04x)", stat);
 368                                 clear_bit(XMIT_SENDING, &(info->tx_state));
 369                                 bt3c_write_wakeup(info);
 370                         }
 371
 372                         bt3c_io_write(iobase, 0x7001, 0x0000);
 373
 374                         outb(iir, iobase + CONTROL);
 375                 }
 376                 r = IRQ_HANDLED;
 377         }
 378
 379         spin_unlock(&(info->lock));
 380
 381         return r;
 382 }
 383
 384
 385
 386 /* ======================== HCI interface ======================== */
 387
 388
 389 static int bt3c_hci_flush(struct hci_dev *hdev)
 390 {
 391         bt3c_info_t *info = hci_get_drvdata(hdev);
 392
 393         /* Drop TX queue */
 394         skb_queue_purge(&(info->txq));
 395
 396         return 0;
 397 }
 398
 399
 400 static int bt3c_hci_open(struct hci_dev *hdev)
 401 {
 402         set_bit(HCI_RUNNING, &(hdev->flags));
 403
 404         return 0;
 405 }
 406
 407
 408 static int bt3c_hci_close(struct hci_dev *hdev)
 409 {
 410         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 411                 return 0;
 412
 413         bt3c_hci_flush(hdev);
 414
 415         return 0;
 416 }
 417
 418
 419 static int bt3c_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 420 {
 421         bt3c_info_t *info = hci_get_drvdata(hdev);
 422         unsigned long flags;
 423
 424         switch (bt_cb(skb)->pkt_type) {
 425         case HCI_COMMAND_PKT:
 426                 hdev->stat.cmd_tx++;
 427                 break;
 428         case HCI_ACLDATA_PKT:
 429                 hdev->stat.acl_tx++;
 430                 break;
 431         case HCI_SCODATA_PKT:
 432                 hdev->stat.sco_tx++;
 433                 break;
 434         };
 435
 436         /* Prepend skb with frame type */
 437         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 438         skb_queue_tail(&(info->txq), skb);
 439
 440         spin_lock_irqsave(&(info->lock), flags);
 441
 442         bt3c_write_wakeup(info);
 443
 444         spin_unlock_irqrestore(&(info->lock), flags);
 445
 446         return 0;
 447 }
 448
 449
 450
 451 /* ======================== Card services HCI interaction ======================== */
 452
 453
 454 static int bt3c_load_firmware(bt3c_info_t *info, const unsigned char *firmware,
 455                               int count)
 456 {
 457         char *ptr = (char *) firmware;
 458         char b[9];
 459         unsigned int iobase, size, addr, fcs, tmp;
 460         int i, err = 0;
 461
 462         iobase = info->p_dev->resource[0]->start;
 463
 464         /* Reset */
 465         bt3c_io_write(iobase, 0x8040, 0x0404);
 466         bt3c_io_write(iobase, 0x8040, 0x0400);
 467
 468         udelay(1);
 469
 470         bt3c_io_write(iobase, 0x8040, 0x0404);
 471
 472         udelay(17);
 473
 474         /* Load */
 475         while (count) {
 476                 if (ptr[0] != 'S') {
 477                         BT_ERR("Bad address in firmware");
 478                         err = -EFAULT;
 479                         goto error;
 480                 }
 481
 482                 memset(b, 0, sizeof(b));
 483                 memcpy(b, ptr + 2, 2);
 484                 size = simple_strtoul(b, NULL, 16);
 485
 486                 memset(b, 0, sizeof(b));
 487                 memcpy(b, ptr + 4, 8);
 488                 addr = simple_strtoul(b, NULL, 16);
 489
 490                 memset(b, 0, sizeof(b));
 491                 memcpy(b, ptr + (size * 2) + 2, 2);
 492                 fcs = simple_strtoul(b, NULL, 16);
 493
 494                 memset(b, 0, sizeof(b));
 495                 for (tmp = 0, i = 0; i < size; i++) {
 496                         memcpy(b, ptr + (i * 2) + 2, 2);
 497                         tmp += simple_strtol(b, NULL, 16);
 498                 }
 499
 500                 if (((tmp + fcs) & 0xff) != 0xff) {
 501                         BT_ERR("Checksum error in firmware");
 502                         err = -EILSEQ;
 503                         goto error;
 504                 }
 505
 506                 if (ptr[1] == '3') {
 507                         bt3c_address(iobase, addr);
 508
 509                         memset(b, 0, sizeof(b));
 510                         for (i = 0; i < (size - 4) / 2; i++) {
 511                                 memcpy(b, ptr + (i * 4) + 12, 4);
 512                                 tmp = simple_strtoul(b, NULL, 16);
 513                                 bt3c_put(iobase, tmp);
 514                         }
 515                 }
 516
 517                 ptr   += (size * 2) + 6;
 518                 count -= (size * 2) + 6;
 519         }
 520
 521         udelay(17);
 522
 523         /* Boot */
 524         bt3c_address(iobase, 0x3000);
 525         outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
 526
 527 error:
 528         udelay(17);
 529
 530         /* Clear */
 531         bt3c_io_write(iobase, 0x7006, 0x0000);
 532         bt3c_io_write(iobase, 0x7005, 0x0000);
 533         bt3c_io_write(iobase, 0x7001, 0x0000);
 534
 535         return err;
 536 }
 537
 538
 539 static int bt3c_open(bt3c_info_t *info)
 540 {
 541         const struct firmware *firmware;
 542         struct hci_dev *hdev;
 543         int err;
 544
 545         spin_lock_init(&(info->lock));
 546
 547         skb_queue_head_init(&(info->txq));
 548
 549         info->rx_state = RECV_WAIT_PACKET_TYPE;
 550         info->rx_count = 0;
 551         info->rx_skb = NULL;
 552
 553         /* Initialize HCI device */
 554         hdev = hci_alloc_dev();
 555         if (!hdev) {
 556                 BT_ERR("Can't allocate HCI device");
 557                 return -ENOMEM;
 558         }
 559
 560         info->hdev = hdev;
 561
 562         hdev->bus = HCI_PCCARD;
 563         hci_set_drvdata(hdev, info);
 564         SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
 565
 566         hdev->open  = bt3c_hci_open;
 567         hdev->close = bt3c_hci_close;
 568         hdev->flush = bt3c_hci_flush;
 569         hdev->send  = bt3c_hci_send_frame;
 570
 571         /* Load firmware */
 572         err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
 573         if (err < 0) {
 574                 BT_ERR("Firmware request failed");
 575                 goto error;
 576         }
 577
 578         err = bt3c_load_firmware(info, firmware->data, firmware->size);
 579
 580         release_firmware(firmware);
 581
 582         if (err < 0) {
 583                 BT_ERR("Firmware loading failed");
 584                 goto error;
 585         }
 586
 587         /* Timeout before it is safe to send the first HCI packet */
 588         msleep(1000);
 589
 590         /* Register HCI device */
 591         err = hci_register_dev(hdev);
 592         if (err < 0) {
 593                 BT_ERR("Can't register HCI device");
 594                 goto error;
 595         }
 596
 597         return 0;
 598
 599 error:
 600         info->hdev = NULL;
 601         hci_free_dev(hdev);
 602         return err;
 603 }
 604
 605
 606 static int bt3c_close(bt3c_info_t *info)
 607 {
 608         struct hci_dev *hdev = info->hdev;
 609
 610         if (!hdev)
 611                 return -ENODEV;
 612
 613         bt3c_hci_close(hdev);
 614
 615         hci_unregister_dev(hdev);
 616         hci_free_dev(hdev);
 617
 618         return 0;
 619 }
 620
 621 static int bt3c_probe(struct pcmcia_device *link)
 622 {
 623         bt3c_info_t *info;
 624
 625         /* Create new info device */
 626         info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
 627         if (!info)
 628                 return -ENOMEM;
 629
 630         info->p_dev = link;
 631         link->priv = info;
 632
 633         link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
 634                 CONF_AUTO_SET_IO;
 635
 636         return bt3c_config(link);
 637 }
 638
 639
 640 static void bt3c_detach(struct pcmcia_device *link)
 641 {
 642         bt3c_release(link);
 643 }
 644
 645 static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data)
 646 {
 647         int *try = priv_data;
 648
 649         if (!try)
 650                 p_dev->io_lines = 16;
 651
 652         if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
 653                 return -EINVAL;
 654
 655         p_dev->resource[0]->end = 8;
 656         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 657         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 658
 659         return pcmcia_request_io(p_dev);
 660 }
 661
 662 static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
 663                                       void *priv_data)
 664 {
 665         static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
 666         int j;
 667
 668         if (p_dev->io_lines > 3)
 669                 return -ENODEV;
 670
 671         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
 672         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 673         p_dev->resource[0]->end = 8;
 674
 675         for (j = 0; j < 5; j++) {
 676                 p_dev->resource[0]->start = base[j];
 677                 p_dev->io_lines = base[j] ? 16 : 3;
 678                 if (!pcmcia_request_io(p_dev))
 679                         return 0;
 680         }
 681         return -ENODEV;
 682 }
 683
 684 static int bt3c_config(struct pcmcia_device *link)
 685 {
 686         bt3c_info_t *info = link->priv;
 687         int i;
 688         unsigned long try;
 689
 690         /* First pass: look for a config entry that looks normal.
 691            Two tries: without IO aliases, then with aliases */
 692         for (try = 0; try < 2; try++)
 693                 if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
 694                         goto found_port;
 695
 696         /* Second pass: try to find an entry that isn't picky about
 697            its base address, then try to grab any standard serial port
 698            address, and finally try to get any free port. */
 699         if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
 700                 goto found_port;
 701
 702         BT_ERR("No usable port range found");
 703         goto failed;
 704
 705 found_port:
 706         i = pcmcia_request_irq(link, &bt3c_interrupt);
 707         if (i != 0)
 708                 goto failed;
 709
 710         i = pcmcia_enable_device(link);
 711         if (i != 0)
 712                 goto failed;
 713
 714         if (bt3c_open(info) != 0)
 715                 goto failed;
 716
 717         return 0;
 718
 719 failed:
 720         bt3c_release(link);
 721         return -ENODEV;
 722 }
 723
 724
 725 static void bt3c_release(struct pcmcia_device *link)
 726 {
 727         bt3c_info_t *info = link->priv;
 728
 729         bt3c_close(info);
 730
 731         pcmcia_disable_device(link);
 732 }
 733
 734
 735 static const struct pcmcia_device_id bt3c_ids[] = {
 736         PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
 737         PCMCIA_DEVICE_NULL
 738 };
 739 MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
 740
 741 static struct pcmcia_driver bt3c_driver = {
 742         .owner          = THIS_MODULE,
 743         .name           = "bt3c_cs",
 744         .probe          = bt3c_probe,
 745         .remove         = bt3c_detach,
 746         .id_table       = bt3c_ids,
 747 };
 748 module_pcmcia_driver(bt3c_driver);