git.oblomov.eu Git - linux-2.6/blob - 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/config.h>
  25 #include <linux/module.h>
  26
  27 #include <linux/kernel.h>
  28 #include <linux/init.h>
  29 #include <linux/slab.h>
  30 #include <linux/types.h>
  31 #include <linux/sched.h>
  32 #include <linux/delay.h>
  33 #include <linux/errno.h>
  34 #include <linux/ptrace.h>
  35 #include <linux/ioport.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/moduleparam.h>
  38
  39 #include <linux/skbuff.h>
  40 #include <linux/string.h>
  41 #include <linux/serial.h>
  42 #include <linux/serial_reg.h>
  43 #include <linux/bitops.h>
  44 #include <asm/system.h>
  45 #include <asm/io.h>
  46
  47 #include <linux/device.h>
  48 #include <linux/firmware.h>
  49
  50 #include <pcmcia/cs_types.h>
  51 #include <pcmcia/cs.h>
  52 #include <pcmcia/cistpl.h>
  53 #include <pcmcia/ciscode.h>
  54 #include <pcmcia/ds.h>
  55 #include <pcmcia/cisreg.h>
  56
  57 #include <net/bluetooth/bluetooth.h>
  58 #include <net/bluetooth/hci_core.h>
  59
  60
  61
  62 /* ======================== Module parameters ======================== */
  63
  64
  65 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>, Jose Orlando Pereira <jop@di.uminho.pt>");
  66 MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
  67 MODULE_LICENSE("GPL");
  68
  69
  70
  71 /* ======================== Local structures ======================== */
  72
  73
  74 typedef struct bt3c_info_t {
  75         struct pcmcia_device *p_dev;
  76         dev_node_t node;
  77
  78         struct hci_dev *hdev;
  79
  80         spinlock_t lock;                /* For serializing operations */
  81
  82         struct sk_buff_head txq;
  83         unsigned long tx_state;
  84
  85         unsigned long rx_state;
  86         unsigned long rx_count;
  87         struct sk_buff *rx_skb;
  88 } bt3c_info_t;
  89
  90
  91 static int bt3c_config(struct pcmcia_device *link);
  92 static void bt3c_release(struct pcmcia_device *link);
  93
  94 static void bt3c_detach(struct pcmcia_device *p_dev);
  95
  96
  97 /* Transmit states  */
  98 #define XMIT_SENDING  1
  99 #define XMIT_WAKEUP   2
 100 #define XMIT_WAITING  8
 101
 102 /* Receiver states */
 103 #define RECV_WAIT_PACKET_TYPE   0
 104 #define RECV_WAIT_EVENT_HEADER  1
 105 #define RECV_WAIT_ACL_HEADER    2
 106 #define RECV_WAIT_SCO_HEADER    3
 107 #define RECV_WAIT_DATA          4
 108
 109
 110
 111 /* ======================== Special I/O functions ======================== */
 112
 113
 114 #define DATA_L   0
 115 #define DATA_H   1
 116 #define ADDR_L   2
 117 #define ADDR_H   3
 118 #define CONTROL  4
 119
 120
 121 static inline void bt3c_address(unsigned int iobase, unsigned short addr)
 122 {
 123         outb(addr & 0xff, iobase + ADDR_L);
 124         outb((addr >> 8) & 0xff, iobase + ADDR_H);
 125 }
 126
 127
 128 static inline void bt3c_put(unsigned int iobase, unsigned short value)
 129 {
 130         outb(value & 0xff, iobase + DATA_L);
 131         outb((value >> 8) & 0xff, iobase + DATA_H);
 132 }
 133
 134
 135 static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
 136 {
 137         bt3c_address(iobase, addr);
 138         bt3c_put(iobase, value);
 139 }
 140
 141
 142 static inline unsigned short bt3c_get(unsigned int iobase)
 143 {
 144         unsigned short value = inb(iobase + DATA_L);
 145
 146         value |= inb(iobase + DATA_H) << 8;
 147
 148         return value;
 149 }
 150
 151
 152 static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
 153 {
 154         bt3c_address(iobase, addr);
 155
 156         return bt3c_get(iobase);
 157 }
 158
 159
 160
 161 /* ======================== Interrupt handling ======================== */
 162
 163
 164 static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
 165 {
 166         int actual = 0;
 167
 168         bt3c_address(iobase, 0x7080);
 169
 170         /* Fill FIFO with current frame */
 171         while (actual < len) {
 172                 /* Transmit next byte */
 173                 bt3c_put(iobase, buf[actual]);
 174                 actual++;
 175         }
 176
 177         bt3c_io_write(iobase, 0x7005, actual);
 178
 179         return actual;
 180 }
 181
 182
 183 static void bt3c_write_wakeup(bt3c_info_t *info)
 184 {
 185         if (!info) {
 186                 BT_ERR("Unknown device");
 187                 return;
 188         }
 189
 190         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
 191                 return;
 192
 193         do {
 194                 register unsigned int iobase = info->p_dev->io.BasePort1;
 195                 register struct sk_buff *skb;
 196                 register int len;
 197
 198                 if (!pcmcia_dev_present(info->p_dev))
 199                         break;
 200
 201
 202                 if (!(skb = skb_dequeue(&(info->txq)))) {
 203                         clear_bit(XMIT_SENDING, &(info->tx_state));
 204                         break;
 205                 }
 206
 207                 /* Send frame */
 208                 len = bt3c_write(iobase, 256, skb->data, skb->len);
 209
 210                 if (len != skb->len) {
 211                         BT_ERR("Very strange");
 212                 }
 213
 214                 kfree_skb(skb);
 215
 216                 info->hdev->stat.byte_tx += len;
 217
 218         } while (0);
 219 }
 220
 221
 222 static void bt3c_receive(bt3c_info_t *info)
 223 {
 224         unsigned int iobase;
 225         int size = 0, avail;
 226
 227         if (!info) {
 228                 BT_ERR("Unknown device");
 229                 return;
 230         }
 231
 232         iobase = info->p_dev->io.BasePort1;
 233
 234         avail = bt3c_read(iobase, 0x7006);
 235         //printk("bt3c_cs: receiving %d bytes\n", avail);
 236
 237         bt3c_address(iobase, 0x7480);
 238         while (size < avail) {
 239                 size++;
 240                 info->hdev->stat.byte_rx++;
 241
 242                 /* Allocate packet */
 243                 if (info->rx_skb == NULL) {
 244                         info->rx_state = RECV_WAIT_PACKET_TYPE;
 245                         info->rx_count = 0;
 246                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 247                                 BT_ERR("Can't allocate mem for new packet");
 248                                 return;
 249                         }
 250                 }
 251
 252
 253                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
 254
 255                         info->rx_skb->dev = (void *) info->hdev;
 256                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
 257                         inb(iobase + DATA_H);
 258                         //printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type);
 259
 260                         switch (bt_cb(info->rx_skb)->pkt_type) {
 261
 262                         case HCI_EVENT_PKT:
 263                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
 264                                 info->rx_count = HCI_EVENT_HDR_SIZE;
 265                                 break;
 266
 267                         case HCI_ACLDATA_PKT:
 268                                 info->rx_state = RECV_WAIT_ACL_HEADER;
 269                                 info->rx_count = HCI_ACL_HDR_SIZE;
 270                                 break;
 271
 272                         case HCI_SCODATA_PKT:
 273                                 info->rx_state = RECV_WAIT_SCO_HEADER;
 274                                 info->rx_count = HCI_SCO_HDR_SIZE;
 275                                 break;
 276
 277                         default:
 278                                 /* Unknown packet */
 279                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
 280                                 info->hdev->stat.err_rx++;
 281                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
 282
 283                                 kfree_skb(info->rx_skb);
 284                                 info->rx_skb = NULL;
 285                                 break;
 286
 287                         }
 288
 289                 } else {
 290
 291                         __u8 x = inb(iobase + DATA_L);
 292
 293                         *skb_put(info->rx_skb, 1) = x;
 294                         inb(iobase + DATA_H);
 295                         info->rx_count--;
 296
 297                         if (info->rx_count == 0) {
 298
 299                                 int dlen;
 300                                 struct hci_event_hdr *eh;
 301                                 struct hci_acl_hdr *ah;
 302                                 struct hci_sco_hdr *sh;
 303
 304                                 switch (info->rx_state) {
 305
 306                                 case RECV_WAIT_EVENT_HEADER:
 307                                         eh = (struct hci_event_hdr *)(info->rx_skb->data);
 308                                         info->rx_state = RECV_WAIT_DATA;
 309                                         info->rx_count = eh->plen;
 310                                         break;
 311
 312                                 case RECV_WAIT_ACL_HEADER:
 313                                         ah = (struct hci_acl_hdr *)(info->rx_skb->data);
 314                                         dlen = __le16_to_cpu(ah->dlen);
 315                                         info->rx_state = RECV_WAIT_DATA;
 316                                         info->rx_count = dlen;
 317                                         break;
 318
 319                                 case RECV_WAIT_SCO_HEADER:
 320                                         sh = (struct hci_sco_hdr *)(info->rx_skb->data);
 321                                         info->rx_state = RECV_WAIT_DATA;
 322                                         info->rx_count = sh->dlen;
 323                                         break;
 324
 325                                 case RECV_WAIT_DATA:
 326                                         hci_recv_frame(info->rx_skb);
 327                                         info->rx_skb = NULL;
 328                                         break;
 329
 330                                 }
 331
 332                         }
 333
 334                 }
 335
 336         }
 337
 338         bt3c_io_write(iobase, 0x7006, 0x0000);
 339 }
 340
 341
 342 static irqreturn_t bt3c_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
 343 {
 344         bt3c_info_t *info = dev_inst;
 345         unsigned int iobase;
 346         int iir;
 347
 348         if (!info || !info->hdev) {
 349                 BT_ERR("Call of irq %d for unknown device", irq);
 350                 return IRQ_NONE;
 351         }
 352
 353         iobase = info->p_dev->io.BasePort1;
 354
 355         spin_lock(&(info->lock));
 356
 357         iir = inb(iobase + CONTROL);
 358         if (iir & 0x80) {
 359                 int stat = bt3c_read(iobase, 0x7001);
 360
 361                 if ((stat & 0xff) == 0x7f) {
 362                         BT_ERR("Very strange (stat=0x%04x)", stat);
 363                 } else if ((stat & 0xff) != 0xff) {
 364                         if (stat & 0x0020) {
 365                                 int stat = bt3c_read(iobase, 0x7002) & 0x10;
 366                                 BT_INFO("%s: Antenna %s", info->hdev->name,
 367                                                         stat ? "out" : "in");
 368                         }
 369                         if (stat & 0x0001)
 370                                 bt3c_receive(info);
 371                         if (stat & 0x0002) {
 372                                 //BT_ERR("Ack (stat=0x%04x)", stat);
 373                                 clear_bit(XMIT_SENDING, &(info->tx_state));
 374                                 bt3c_write_wakeup(info);
 375                         }
 376
 377                         bt3c_io_write(iobase, 0x7001, 0x0000);
 378
 379                         outb(iir, iobase + CONTROL);
 380                 }
 381         }
 382
 383         spin_unlock(&(info->lock));
 384
 385         return IRQ_HANDLED;
 386 }
 387
 388
 389
 390 /* ======================== HCI interface ======================== */
 391
 392
 393 static int bt3c_hci_flush(struct hci_dev *hdev)
 394 {
 395         bt3c_info_t *info = (bt3c_info_t *)(hdev->driver_data);
 396
 397         /* Drop TX queue */
 398         skb_queue_purge(&(info->txq));
 399
 400         return 0;
 401 }
 402
 403
 404 static int bt3c_hci_open(struct hci_dev *hdev)
 405 {
 406         set_bit(HCI_RUNNING, &(hdev->flags));
 407
 408         return 0;
 409 }
 410
 411
 412 static int bt3c_hci_close(struct hci_dev *hdev)
 413 {
 414         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 415                 return 0;
 416
 417         bt3c_hci_flush(hdev);
 418
 419         return 0;
 420 }
 421
 422
 423 static int bt3c_hci_send_frame(struct sk_buff *skb)
 424 {
 425         bt3c_info_t *info;
 426         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
 427         unsigned long flags;
 428
 429         if (!hdev) {
 430                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 431                 return -ENODEV;
 432         }
 433
 434         info = (bt3c_info_t *) (hdev->driver_data);
 435
 436         switch (bt_cb(skb)->pkt_type) {
 437         case HCI_COMMAND_PKT:
 438                 hdev->stat.cmd_tx++;
 439                 break;
 440         case HCI_ACLDATA_PKT:
 441                 hdev->stat.acl_tx++;
 442                 break;
 443         case HCI_SCODATA_PKT:
 444                 hdev->stat.sco_tx++;
 445                 break;
 446         };
 447
 448         /* Prepend skb with frame type */
 449         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 450         skb_queue_tail(&(info->txq), skb);
 451
 452         spin_lock_irqsave(&(info->lock), flags);
 453
 454         bt3c_write_wakeup(info);
 455
 456         spin_unlock_irqrestore(&(info->lock), flags);
 457
 458         return 0;
 459 }
 460
 461
 462 static void bt3c_hci_destruct(struct hci_dev *hdev)
 463 {
 464 }
 465
 466
 467 static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 468 {
 469         return -ENOIOCTLCMD;
 470 }
 471
 472
 473
 474 /* ======================== Card services HCI interaction ======================== */
 475
 476
 477 static int bt3c_load_firmware(bt3c_info_t *info, unsigned char *firmware, int count)
 478 {
 479         char *ptr = (char *) firmware;
 480         char b[9];
 481         unsigned int iobase, size, addr, fcs, tmp;
 482         int i, err = 0;
 483
 484         iobase = info->p_dev->io.BasePort1;
 485
 486         /* Reset */
 487         bt3c_io_write(iobase, 0x8040, 0x0404);
 488         bt3c_io_write(iobase, 0x8040, 0x0400);
 489
 490         udelay(1);
 491
 492         bt3c_io_write(iobase, 0x8040, 0x0404);
 493
 494         udelay(17);
 495
 496         /* Load */
 497         while (count) {
 498                 if (ptr[0] != 'S') {
 499                         BT_ERR("Bad address in firmware");
 500                         err = -EFAULT;
 501                         goto error;
 502                 }
 503
 504                 memset(b, 0, sizeof(b));
 505                 memcpy(b, ptr + 2, 2);
 506                 size = simple_strtol(b, NULL, 16);
 507
 508                 memset(b, 0, sizeof(b));
 509                 memcpy(b, ptr + 4, 8);
 510                 addr = simple_strtol(b, NULL, 16);
 511
 512                 memset(b, 0, sizeof(b));
 513                 memcpy(b, ptr + (size * 2) + 2, 2);
 514                 fcs = simple_strtol(b, NULL, 16);
 515
 516                 memset(b, 0, sizeof(b));
 517                 for (tmp = 0, i = 0; i < size; i++) {
 518                         memcpy(b, ptr + (i * 2) + 2, 2);
 519                         tmp += simple_strtol(b, NULL, 16);
 520                 }
 521
 522                 if (((tmp + fcs) & 0xff) != 0xff) {
 523                         BT_ERR("Checksum error in firmware");
 524                         err = -EILSEQ;
 525                         goto error;
 526                 }
 527
 528                 if (ptr[1] == '3') {
 529                         bt3c_address(iobase, addr);
 530
 531                         memset(b, 0, sizeof(b));
 532                         for (i = 0; i < (size - 4) / 2; i++) {
 533                                 memcpy(b, ptr + (i * 4) + 12, 4);
 534                                 tmp = simple_strtol(b, NULL, 16);
 535                                 bt3c_put(iobase, tmp);
 536                         }
 537                 }
 538
 539                 ptr   += (size * 2) + 6;
 540                 count -= (size * 2) + 6;
 541         }
 542
 543         udelay(17);
 544
 545         /* Boot */
 546         bt3c_address(iobase, 0x3000);
 547         outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
 548
 549 error:
 550         udelay(17);
 551
 552         /* Clear */
 553         bt3c_io_write(iobase, 0x7006, 0x0000);
 554         bt3c_io_write(iobase, 0x7005, 0x0000);
 555         bt3c_io_write(iobase, 0x7001, 0x0000);
 556
 557         return err;
 558 }
 559
 560
 561 static int bt3c_open(bt3c_info_t *info)
 562 {
 563         const struct firmware *firmware;
 564         struct hci_dev *hdev;
 565         int err;
 566
 567         spin_lock_init(&(info->lock));
 568
 569         skb_queue_head_init(&(info->txq));
 570
 571         info->rx_state = RECV_WAIT_PACKET_TYPE;
 572         info->rx_count = 0;
 573         info->rx_skb = NULL;
 574
 575         /* Initialize HCI device */
 576         hdev = hci_alloc_dev();
 577         if (!hdev) {
 578                 BT_ERR("Can't allocate HCI device");
 579                 return -ENOMEM;
 580         }
 581
 582         info->hdev = hdev;
 583
 584         hdev->type = HCI_PCCARD;
 585         hdev->driver_data = info;
 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_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 663         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 664
 665         link->irq.Handler = bt3c_interrupt;
 666         link->irq.Instance = info;
 667
 668         link->conf.Attributes = CONF_ENABLE_IRQ;
 669         link->conf.IntType = INT_MEMORY_AND_IO;
 670
 671         return bt3c_config(link);
 672 }
 673
 674
 675 static void bt3c_detach(struct pcmcia_device *link)
 676 {
 677         bt3c_info_t *info = link->priv;
 678
 679         bt3c_release(link);
 680         kfree(info);
 681 }
 682
 683 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 684 {
 685         int i;
 686
 687         i = pcmcia_get_tuple_data(handle, tuple);
 688         if (i != CS_SUCCESS)
 689                 return i;
 690
 691         return pcmcia_parse_tuple(handle, tuple, parse);
 692 }
 693
 694 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 695 {
 696         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
 697                 return CS_NO_MORE_ITEMS;
 698         return get_tuple(handle, tuple, parse);
 699 }
 700
 701 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 702 {
 703         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
 704                 return CS_NO_MORE_ITEMS;
 705         return get_tuple(handle, tuple, parse);
 706 }
 707
 708 static int bt3c_config(struct pcmcia_device *link)
 709 {
 710         static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
 711         bt3c_info_t *info = link->priv;
 712         tuple_t tuple;
 713         u_short buf[256];
 714         cisparse_t parse;
 715         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 716         int i, j, try, last_ret, last_fn;
 717
 718         tuple.TupleData = (cisdata_t *)buf;
 719         tuple.TupleOffset = 0;
 720         tuple.TupleDataMax = 255;
 721         tuple.Attributes = 0;
 722
 723         /* Get configuration register information */
 724         tuple.DesiredTuple = CISTPL_CONFIG;
 725         last_ret = first_tuple(link, &tuple, &parse);
 726         if (last_ret != CS_SUCCESS) {
 727                 last_fn = ParseTuple;
 728                 goto cs_failed;
 729         }
 730         link->conf.ConfigBase = parse.config.base;
 731         link->conf.Present = parse.config.rmask[0];
 732
 733         /* First pass: look for a config entry that looks normal. */
 734         tuple.TupleData = (cisdata_t *)buf;
 735         tuple.TupleOffset = 0;
 736         tuple.TupleDataMax = 255;
 737         tuple.Attributes = 0;
 738         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 739         /* Two tries: without IO aliases, then with aliases */
 740         for (try = 0; try < 2; try++) {
 741                 i = first_tuple(link, &tuple, &parse);
 742                 while (i != CS_NO_MORE_ITEMS) {
 743                         if (i != CS_SUCCESS)
 744                                 goto next_entry;
 745                         if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
 746                                 link->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
 747                         if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) {
 748                                 link->conf.ConfigIndex = cf->index;
 749                                 link->io.BasePort1 = cf->io.win[0].base;
 750                                 link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK;
 751                                 i = pcmcia_request_io(link, &link->io);
 752                                 if (i == CS_SUCCESS)
 753                                         goto found_port;
 754                         }
 755 next_entry:
 756                         i = next_tuple(link, &tuple, &parse);
 757                 }
 758         }
 759
 760         /* Second pass: try to find an entry that isn't picky about
 761            its base address, then try to grab any standard serial port
 762            address, and finally try to get any free port. */
 763         i = first_tuple(link, &tuple, &parse);
 764         while (i != CS_NO_MORE_ITEMS) {
 765                 if ((i == CS_SUCCESS) && (cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
 766                         link->conf.ConfigIndex = cf->index;
 767                         for (j = 0; j < 5; j++) {
 768                                 link->io.BasePort1 = base[j];
 769                                 link->io.IOAddrLines = base[j] ? 16 : 3;
 770                                 i = pcmcia_request_io(link, &link->io);
 771                                 if (i == CS_SUCCESS)
 772                                         goto found_port;
 773                         }
 774                 }
 775                 i = next_tuple(link, &tuple, &parse);
 776         }
 777
 778 found_port:
 779         if (i != CS_SUCCESS) {
 780                 BT_ERR("No usable port range found");
 781                 cs_error(link, RequestIO, i);
 782                 goto failed;
 783         }
 784
 785         i = pcmcia_request_irq(link, &link->irq);
 786         if (i != CS_SUCCESS) {
 787                 cs_error(link, RequestIRQ, i);
 788                 link->irq.AssignedIRQ = 0;
 789         }
 790
 791         i = pcmcia_request_configuration(link, &link->conf);
 792         if (i != CS_SUCCESS) {
 793                 cs_error(link, RequestConfiguration, i);
 794                 goto failed;
 795         }
 796
 797         if (bt3c_open(info) != 0)
 798                 goto failed;
 799
 800         strcpy(info->node.dev_name, info->hdev->name);
 801         link->dev_node = &info->node;
 802
 803         return 0;
 804
 805 cs_failed:
 806         cs_error(link, last_fn, last_ret);
 807
 808 failed:
 809         bt3c_release(link);
 810         return -ENODEV;
 811 }
 812
 813
 814 static void bt3c_release(struct pcmcia_device *link)
 815 {
 816         bt3c_info_t *info = link->priv;
 817
 818         bt3c_close(info);
 819
 820         pcmcia_disable_device(link);
 821 }
 822
 823
 824 static struct pcmcia_device_id bt3c_ids[] = {
 825         PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
 826         PCMCIA_DEVICE_NULL
 827 };
 828 MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
 829
 830 static struct pcmcia_driver bt3c_driver = {
 831         .owner          = THIS_MODULE,
 832         .drv            = {
 833                 .name   = "bt3c_cs",
 834         },
 835         .probe          = bt3c_probe,
 836         .remove         = bt3c_detach,
 837         .id_table       = bt3c_ids,
 838 };
 839
 840 static int __init init_bt3c_cs(void)
 841 {
 842         return pcmcia_register_driver(&bt3c_driver);
 843 }
 844
 845
 846 static void __exit exit_bt3c_cs(void)
 847 {
 848         pcmcia_unregister_driver(&bt3c_driver);
 849 }
 850
 851 module_init(init_bt3c_cs);
 852 module_exit(exit_bt3c_cs);