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/system.h>
  43 #include <asm/io.h>
  44
  45 #include <linux/device.h>
  46 #include <linux/firmware.h>
  47
  48 #include <pcmcia/cs_types.h>
  49 #include <pcmcia/cs.h>
  50 #include <pcmcia/cistpl.h>
  51 #include <pcmcia/ciscode.h>
  52 #include <pcmcia/ds.h>
  53 #include <pcmcia/cisreg.h>
  54
  55 #include <net/bluetooth/bluetooth.h>
  56 #include <net/bluetooth/hci_core.h>
  57
  58
  59
  60 /* ======================== Module parameters ======================== */
  61
  62
  63 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
  64 MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
  65 MODULE_LICENSE("GPL");
  66 MODULE_FIRMWARE("BT3CPCC.bin");
  67
  68
  69
  70 /* ======================== Local structures ======================== */
  71
  72
  73 typedef struct bt3c_info_t {
  74         struct pcmcia_device *p_dev;
  75         dev_node_t node;
  76
  77         struct hci_dev *hdev;
  78
  79         spinlock_t lock;                /* For serializing operations */
  80
  81         struct sk_buff_head txq;
  82         unsigned long tx_state;
  83
  84         unsigned long rx_state;
  85         unsigned long rx_count;
  86         struct sk_buff *rx_skb;
  87 } bt3c_info_t;
  88
  89
  90 static int bt3c_config(struct pcmcia_device *link);
  91 static void bt3c_release(struct pcmcia_device *link);
  92
  93 static void bt3c_detach(struct pcmcia_device *p_dev);
  94
  95
  96 /* Transmit states  */
  97 #define XMIT_SENDING  1
  98 #define XMIT_WAKEUP   2
  99 #define XMIT_WAITING  8
 100
 101 /* Receiver states */
 102 #define RECV_WAIT_PACKET_TYPE   0
 103 #define RECV_WAIT_EVENT_HEADER  1
 104 #define RECV_WAIT_ACL_HEADER    2
 105 #define RECV_WAIT_SCO_HEADER    3
 106 #define RECV_WAIT_DATA          4
 107
 108
 109
 110 /* ======================== Special I/O functions ======================== */
 111
 112
 113 #define DATA_L   0
 114 #define DATA_H   1
 115 #define ADDR_L   2
 116 #define ADDR_H   3
 117 #define CONTROL  4
 118
 119
 120 static inline void bt3c_address(unsigned int iobase, unsigned short addr)
 121 {
 122         outb(addr & 0xff, iobase + ADDR_L);
 123         outb((addr >> 8) & 0xff, iobase + ADDR_H);
 124 }
 125
 126
 127 static inline void bt3c_put(unsigned int iobase, unsigned short value)
 128 {
 129         outb(value & 0xff, iobase + DATA_L);
 130         outb((value >> 8) & 0xff, iobase + DATA_H);
 131 }
 132
 133
 134 static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
 135 {
 136         bt3c_address(iobase, addr);
 137         bt3c_put(iobase, value);
 138 }
 139
 140
 141 static inline unsigned short bt3c_get(unsigned int iobase)
 142 {
 143         unsigned short value = inb(iobase + DATA_L);
 144
 145         value |= inb(iobase + DATA_H) << 8;
 146
 147         return value;
 148 }
 149
 150
 151 static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
 152 {
 153         bt3c_address(iobase, addr);
 154
 155         return bt3c_get(iobase);
 156 }
 157
 158
 159
 160 /* ======================== Interrupt handling ======================== */
 161
 162
 163 static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
 164 {
 165         int actual = 0;
 166
 167         bt3c_address(iobase, 0x7080);
 168
 169         /* Fill FIFO with current frame */
 170         while (actual < len) {
 171                 /* Transmit next byte */
 172                 bt3c_put(iobase, buf[actual]);
 173                 actual++;
 174         }
 175
 176         bt3c_io_write(iobase, 0x7005, actual);
 177
 178         return actual;
 179 }
 180
 181
 182 static void bt3c_write_wakeup(bt3c_info_t *info)
 183 {
 184         if (!info) {
 185                 BT_ERR("Unknown device");
 186                 return;
 187         }
 188
 189         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
 190                 return;
 191
 192         do {
 193                 register unsigned int iobase = info->p_dev->io.BasePort1;
 194                 register struct sk_buff *skb;
 195                 register int len;
 196
 197                 if (!pcmcia_dev_present(info->p_dev))
 198                         break;
 199
 200
 201                 if (!(skb = skb_dequeue(&(info->txq)))) {
 202                         clear_bit(XMIT_SENDING, &(info->tx_state));
 203                         break;
 204                 }
 205
 206                 /* Send frame */
 207                 len = bt3c_write(iobase, 256, skb->data, skb->len);
 208
 209                 if (len != skb->len) {
 210                         BT_ERR("Very strange");
 211                 }
 212
 213                 kfree_skb(skb);
 214
 215                 info->hdev->stat.byte_tx += len;
 216
 217         } while (0);
 218 }
 219
 220
 221 static void bt3c_receive(bt3c_info_t *info)
 222 {
 223         unsigned int iobase;
 224         int size = 0, avail;
 225
 226         if (!info) {
 227                 BT_ERR("Unknown device");
 228                 return;
 229         }
 230
 231         iobase = info->p_dev->io.BasePort1;
 232
 233         avail = bt3c_read(iobase, 0x7006);
 234         //printk("bt3c_cs: receiving %d bytes\n", avail);
 235
 236         bt3c_address(iobase, 0x7480);
 237         while (size < avail) {
 238                 size++;
 239                 info->hdev->stat.byte_rx++;
 240
 241                 /* Allocate packet */
 242                 if (info->rx_skb == NULL) {
 243                         info->rx_state = RECV_WAIT_PACKET_TYPE;
 244                         info->rx_count = 0;
 245                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 246                                 BT_ERR("Can't allocate mem for new packet");
 247                                 return;
 248                         }
 249                 }
 250
 251
 252                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
 253
 254                         info->rx_skb->dev = (void *) info->hdev;
 255                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
 256                         inb(iobase + DATA_H);
 257                         //printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type);
 258
 259                         switch (bt_cb(info->rx_skb)->pkt_type) {
 260
 261                         case HCI_EVENT_PKT:
 262                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
 263                                 info->rx_count = HCI_EVENT_HDR_SIZE;
 264                                 break;
 265
 266                         case HCI_ACLDATA_PKT:
 267                                 info->rx_state = RECV_WAIT_ACL_HEADER;
 268                                 info->rx_count = HCI_ACL_HDR_SIZE;
 269                                 break;
 270
 271                         case HCI_SCODATA_PKT:
 272                                 info->rx_state = RECV_WAIT_SCO_HEADER;
 273                                 info->rx_count = HCI_SCO_HDR_SIZE;
 274                                 break;
 275
 276                         default:
 277                                 /* Unknown packet */
 278                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
 279                                 info->hdev->stat.err_rx++;
 280                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
 281
 282                                 kfree_skb(info->rx_skb);
 283                                 info->rx_skb = NULL;
 284                                 break;
 285
 286                         }
 287
 288                 } else {
 289
 290                         __u8 x = inb(iobase + DATA_L);
 291
 292                         *skb_put(info->rx_skb, 1) = x;
 293                         inb(iobase + DATA_H);
 294                         info->rx_count--;
 295
 296                         if (info->rx_count == 0) {
 297
 298                                 int dlen;
 299                                 struct hci_event_hdr *eh;
 300                                 struct hci_acl_hdr *ah;
 301                                 struct hci_sco_hdr *sh;
 302
 303                                 switch (info->rx_state) {
 304
 305                                 case RECV_WAIT_EVENT_HEADER:
 306                                         eh = hci_event_hdr(info->rx_skb);
 307                                         info->rx_state = RECV_WAIT_DATA;
 308                                         info->rx_count = eh->plen;
 309                                         break;
 310
 311                                 case RECV_WAIT_ACL_HEADER:
 312                                         ah = hci_acl_hdr(info->rx_skb);
 313                                         dlen = __le16_to_cpu(ah->dlen);
 314                                         info->rx_state = RECV_WAIT_DATA;
 315                                         info->rx_count = dlen;
 316                                         break;
 317
 318                                 case RECV_WAIT_SCO_HEADER:
 319                                         sh = hci_sco_hdr(info->rx_skb);
 320                                         info->rx_state = RECV_WAIT_DATA;
 321                                         info->rx_count = sh->dlen;
 322                                         break;
 323
 324                                 case RECV_WAIT_DATA:
 325                                         hci_recv_frame(info->rx_skb);
 326                                         info->rx_skb = NULL;
 327                                         break;
 328
 329                                 }
 330
 331                         }
 332
 333                 }
 334
 335         }
 336
 337         bt3c_io_write(iobase, 0x7006, 0x0000);
 338 }
 339
 340
 341 static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
 342 {
 343         bt3c_info_t *info = dev_inst;
 344         unsigned int iobase;
 345         int iir;
 346         irqreturn_t r = IRQ_NONE;
 347
 348         BUG_ON(!info->hdev);
 349
 350         iobase = info->p_dev->io.BasePort1;
 351
 352         spin_lock(&(info->lock));
 353
 354         iir = inb(iobase + CONTROL);
 355         if (iir & 0x80) {
 356                 int stat = bt3c_read(iobase, 0x7001);
 357
 358                 if ((stat & 0xff) == 0x7f) {
 359                         BT_ERR("Very strange (stat=0x%04x)", stat);
 360                 } else if ((stat & 0xff) != 0xff) {
 361                         if (stat & 0x0020) {
 362                                 int status = bt3c_read(iobase, 0x7002) & 0x10;
 363                                 BT_INFO("%s: Antenna %s", info->hdev->name,
 364                                                         status ? "out" : "in");
 365                         }
 366                         if (stat & 0x0001)
 367                                 bt3c_receive(info);
 368                         if (stat & 0x0002) {
 369                                 //BT_ERR("Ack (stat=0x%04x)", stat);
 370                                 clear_bit(XMIT_SENDING, &(info->tx_state));
 371                                 bt3c_write_wakeup(info);
 372                         }
 373
 374                         bt3c_io_write(iobase, 0x7001, 0x0000);
 375
 376                         outb(iir, iobase + CONTROL);
 377                 }
 378                 r = IRQ_HANDLED;
 379         }
 380
 381         spin_unlock(&(info->lock));
 382
 383         return r;
 384 }
 385
 386
 387
 388 /* ======================== HCI interface ======================== */
 389
 390
 391 static int bt3c_hci_flush(struct hci_dev *hdev)
 392 {
 393         bt3c_info_t *info = (bt3c_info_t *)(hdev->driver_data);
 394
 395         /* Drop TX queue */
 396         skb_queue_purge(&(info->txq));
 397
 398         return 0;
 399 }
 400
 401
 402 static int bt3c_hci_open(struct hci_dev *hdev)
 403 {
 404         set_bit(HCI_RUNNING, &(hdev->flags));
 405
 406         return 0;
 407 }
 408
 409
 410 static int bt3c_hci_close(struct hci_dev *hdev)
 411 {
 412         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 413                 return 0;
 414
 415         bt3c_hci_flush(hdev);
 416
 417         return 0;
 418 }
 419
 420
 421 static int bt3c_hci_send_frame(struct sk_buff *skb)
 422 {
 423         bt3c_info_t *info;
 424         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
 425         unsigned long flags;
 426
 427         if (!hdev) {
 428                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 429                 return -ENODEV;
 430         }
 431
 432         info = (bt3c_info_t *) (hdev->driver_data);
 433
 434         switch (bt_cb(skb)->pkt_type) {
 435         case HCI_COMMAND_PKT:
 436                 hdev->stat.cmd_tx++;
 437                 break;
 438         case HCI_ACLDATA_PKT:
 439                 hdev->stat.acl_tx++;
 440                 break;
 441         case HCI_SCODATA_PKT:
 442                 hdev->stat.sco_tx++;
 443                 break;
 444         };
 445
 446         /* Prepend skb with frame type */
 447         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 448         skb_queue_tail(&(info->txq), skb);
 449
 450         spin_lock_irqsave(&(info->lock), flags);
 451
 452         bt3c_write_wakeup(info);
 453
 454         spin_unlock_irqrestore(&(info->lock), flags);
 455
 456         return 0;
 457 }
 458
 459
 460 static void bt3c_hci_destruct(struct hci_dev *hdev)
 461 {
 462 }
 463
 464
 465 static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 466 {
 467         return -ENOIOCTLCMD;
 468 }
 469
 470
 471
 472 /* ======================== Card services HCI interaction ======================== */
 473
 474
 475 static int bt3c_load_firmware(bt3c_info_t *info, const unsigned char *firmware,
 476                               int count)
 477 {
 478         char *ptr = (char *) firmware;
 479         char b[9];
 480         unsigned int iobase, size, addr, fcs, tmp;
 481         int i, err = 0;
 482
 483         iobase = info->p_dev->io.BasePort1;
 484
 485         /* Reset */
 486         bt3c_io_write(iobase, 0x8040, 0x0404);
 487         bt3c_io_write(iobase, 0x8040, 0x0400);
 488
 489         udelay(1);
 490
 491         bt3c_io_write(iobase, 0x8040, 0x0404);
 492
 493         udelay(17);
 494
 495         /* Load */
 496         while (count) {
 497                 if (ptr[0] != 'S') {
 498                         BT_ERR("Bad address in firmware");
 499                         err = -EFAULT;
 500                         goto error;
 501                 }
 502
 503                 memset(b, 0, sizeof(b));
 504                 memcpy(b, ptr + 2, 2);
 505                 size = simple_strtoul(b, NULL, 16);
 506
 507                 memset(b, 0, sizeof(b));
 508                 memcpy(b, ptr + 4, 8);
 509                 addr = simple_strtoul(b, NULL, 16);
 510
 511                 memset(b, 0, sizeof(b));
 512                 memcpy(b, ptr + (size * 2) + 2, 2);
 513                 fcs = simple_strtoul(b, NULL, 16);
 514
 515                 memset(b, 0, sizeof(b));
 516                 for (tmp = 0, i = 0; i < size; i++) {
 517                         memcpy(b, ptr + (i * 2) + 2, 2);
 518                         tmp += simple_strtol(b, NULL, 16);
 519                 }
 520
 521                 if (((tmp + fcs) & 0xff) != 0xff) {
 522                         BT_ERR("Checksum error in firmware");
 523                         err = -EILSEQ;
 524                         goto error;
 525                 }
 526
 527                 if (ptr[1] == '3') {
 528                         bt3c_address(iobase, addr);
 529
 530                         memset(b, 0, sizeof(b));
 531                         for (i = 0; i < (size - 4) / 2; i++) {
 532                                 memcpy(b, ptr + (i * 4) + 12, 4);
 533                                 tmp = simple_strtoul(b, NULL, 16);
 534                                 bt3c_put(iobase, tmp);
 535                         }
 536                 }
 537
 538                 ptr   += (size * 2) + 6;
 539                 count -= (size * 2) + 6;
 540         }
 541
 542         udelay(17);
 543
 544         /* Boot */
 545         bt3c_address(iobase, 0x3000);
 546         outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
 547
 548 error:
 549         udelay(17);
 550
 551         /* Clear */
 552         bt3c_io_write(iobase, 0x7006, 0x0000);
 553         bt3c_io_write(iobase, 0x7005, 0x0000);
 554         bt3c_io_write(iobase, 0x7001, 0x0000);
 555
 556         return err;
 557 }
 558
 559
 560 static int bt3c_open(bt3c_info_t *info)
 561 {
 562         const struct firmware *firmware;
 563         struct hci_dev *hdev;
 564         int err;
 565
 566         spin_lock_init(&(info->lock));
 567
 568         skb_queue_head_init(&(info->txq));
 569
 570         info->rx_state = RECV_WAIT_PACKET_TYPE;
 571         info->rx_count = 0;
 572         info->rx_skb = NULL;
 573
 574         /* Initialize HCI device */
 575         hdev = hci_alloc_dev();
 576         if (!hdev) {
 577                 BT_ERR("Can't allocate HCI device");
 578                 return -ENOMEM;
 579         }
 580
 581         info->hdev = hdev;
 582
 583         hdev->type = HCI_PCCARD;
 584         hdev->driver_data = info;
 585         SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
 586
 587         hdev->open     = bt3c_hci_open;
 588         hdev->close    = bt3c_hci_close;
 589         hdev->flush    = bt3c_hci_flush;
 590         hdev->send     = bt3c_hci_send_frame;
 591         hdev->destruct = bt3c_hci_destruct;
 592         hdev->ioctl    = bt3c_hci_ioctl;
 593
 594         hdev->owner = THIS_MODULE;
 595
 596         /* Load firmware */
 597         err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
 598         if (err < 0) {
 599                 BT_ERR("Firmware request failed");
 600                 goto error;
 601         }
 602
 603         err = bt3c_load_firmware(info, firmware->data, firmware->size);
 604
 605         release_firmware(firmware);
 606
 607         if (err < 0) {
 608                 BT_ERR("Firmware loading failed");
 609                 goto error;
 610         }
 611
 612         /* Timeout before it is safe to send the first HCI packet */
 613         msleep(1000);
 614
 615         /* Register HCI device */
 616         err = hci_register_dev(hdev);
 617         if (err < 0) {
 618                 BT_ERR("Can't register HCI device");
 619                 goto error;
 620         }
 621
 622         return 0;
 623
 624 error:
 625         info->hdev = NULL;
 626         hci_free_dev(hdev);
 627         return err;
 628 }
 629
 630
 631 static int bt3c_close(bt3c_info_t *info)
 632 {
 633         struct hci_dev *hdev = info->hdev;
 634
 635         if (!hdev)
 636                 return -ENODEV;
 637
 638         bt3c_hci_close(hdev);
 639
 640         if (hci_unregister_dev(hdev) < 0)
 641                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 642
 643         hci_free_dev(hdev);
 644
 645         return 0;
 646 }
 647
 648 static int bt3c_probe(struct pcmcia_device *link)
 649 {
 650         bt3c_info_t *info;
 651
 652         /* Create new info device */
 653         info = kzalloc(sizeof(*info), GFP_KERNEL);
 654         if (!info)
 655                 return -ENOMEM;
 656
 657         info->p_dev = link;
 658         link->priv = info;
 659
 660         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 661         link->io.NumPorts1 = 8;
 662         link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
 663
 664         link->irq.Handler = bt3c_interrupt;
 665
 666         link->conf.Attributes = CONF_ENABLE_IRQ;
 667         link->conf.IntType = INT_MEMORY_AND_IO;
 668
 669         return bt3c_config(link);
 670 }
 671
 672
 673 static void bt3c_detach(struct pcmcia_device *link)
 674 {
 675         bt3c_info_t *info = link->priv;
 676
 677         bt3c_release(link);
 678         kfree(info);
 679 }
 680
 681 static int bt3c_check_config(struct pcmcia_device *p_dev,
 682                              cistpl_cftable_entry_t *cf,
 683                              cistpl_cftable_entry_t *dflt,
 684                              unsigned int vcc,
 685                              void *priv_data)
 686 {
 687         unsigned long try = (unsigned long) priv_data;
 688
 689         if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
 690                 p_dev->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
 691         if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) &&
 692             (cf->io.win[0].base != 0)) {
 693                 p_dev->io.BasePort1 = cf->io.win[0].base;
 694                 p_dev->io.IOAddrLines = (try == 0) ? 16 :
 695                         cf->io.flags & CISTPL_IO_LINES_MASK;
 696                 if (!pcmcia_request_io(p_dev, &p_dev->io))
 697                         return 0;
 698         }
 699         return -ENODEV;
 700 }
 701
 702 static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
 703                                       cistpl_cftable_entry_t *cf,
 704                                       cistpl_cftable_entry_t *dflt,
 705                                       unsigned int vcc,
 706                                       void *priv_data)
 707 {
 708         static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
 709         int j;
 710
 711         if ((cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
 712                 for (j = 0; j < 5; j++) {
 713                         p_dev->io.BasePort1 = base[j];
 714                         p_dev->io.IOAddrLines = base[j] ? 16 : 3;
 715                         if (!pcmcia_request_io(p_dev, &p_dev->io))
 716                                 return 0;
 717                 }
 718         }
 719         return -ENODEV;
 720 }
 721
 722 static int bt3c_config(struct pcmcia_device *link)
 723 {
 724         bt3c_info_t *info = link->priv;
 725         int i;
 726         unsigned long try;
 727
 728         /* First pass: look for a config entry that looks normal.
 729            Two tries: without IO aliases, then with aliases */
 730         for (try = 0; try < 2; try++)
 731                 if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
 732                         goto found_port;
 733
 734         /* Second pass: try to find an entry that isn't picky about
 735            its base address, then try to grab any standard serial port
 736            address, and finally try to get any free port. */
 737         if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
 738                 goto found_port;
 739
 740         BT_ERR("No usable port range found");
 741         goto failed;
 742
 743 found_port:
 744         i = pcmcia_request_irq(link, &link->irq);
 745         if (i != 0)
 746                 link->irq.AssignedIRQ = 0;
 747
 748         i = pcmcia_request_configuration(link, &link->conf);
 749         if (i != 0)
 750                 goto failed;
 751
 752         if (bt3c_open(info) != 0)
 753                 goto failed;
 754
 755         strcpy(info->node.dev_name, info->hdev->name);
 756         link->dev_node = &info->node;
 757
 758         return 0;
 759
 760 failed:
 761         bt3c_release(link);
 762         return -ENODEV;
 763 }
 764
 765
 766 static void bt3c_release(struct pcmcia_device *link)
 767 {
 768         bt3c_info_t *info = link->priv;
 769
 770         bt3c_close(info);
 771
 772         pcmcia_disable_device(link);
 773 }
 774
 775
 776 static struct pcmcia_device_id bt3c_ids[] = {
 777         PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
 778         PCMCIA_DEVICE_NULL
 779 };
 780 MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
 781
 782 static struct pcmcia_driver bt3c_driver = {
 783         .owner          = THIS_MODULE,
 784         .drv            = {
 785                 .name   = "bt3c_cs",
 786         },
 787         .probe          = bt3c_probe,
 788         .remove         = bt3c_detach,
 789         .id_table       = bt3c_ids,
 790 };
 791
 792 static int __init init_bt3c_cs(void)
 793 {
 794         return pcmcia_register_driver(&bt3c_driver);
 795 }
 796
 797
 798 static void __exit exit_bt3c_cs(void)
 799 {
 800         pcmcia_unregister_driver(&bt3c_driver);
 801 }
 802
 803 module_init(init_bt3c_cs);
 804 module_exit(exit_bt3c_cs);