git.oblomov.eu Git - linux-2.6/blob - drivers/bluetooth/btuart_cs.c

   1 /*
   2  *
   3  *  Driver for Bluetooth PCMCIA cards with HCI UART interface
   4  *
   5  *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
   6  *
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation;
  11  *
  12  *  Software distributed under the License is distributed on an "AS
  13  *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  14  *  implied. See the License for the specific language governing
  15  *  rights and limitations under the License.
  16  *
  17  *  The initial developer of the original code is David A. Hinds
  18  *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  19  *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  20  *
  21  */
  22
  23 #include <linux/module.h>
  24
  25 #include <linux/kernel.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/types.h>
  29 #include <linux/sched.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 <pcmcia/cs_types.h>
  46 #include <pcmcia/cs.h>
  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 Bluetooth PCMCIA cards with HCI UART interface");
  62 MODULE_LICENSE("GPL");
  63
  64
  65
  66 /* ======================== Local structures ======================== */
  67
  68
  69 typedef struct btuart_info_t {
  70         struct pcmcia_device *p_dev;
  71         dev_node_t node;
  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 } btuart_info_t;
  84
  85
  86 static int btuart_config(struct pcmcia_device *link);
  87 static void btuart_release(struct pcmcia_device *link);
  88
  89 static void btuart_detach(struct pcmcia_device *p_dev);
  90
  91
  92 /* Maximum baud rate */
  93 #define SPEED_MAX  115200
  94
  95 /* Default baud rate: 57600, 115200, 230400 or 460800 */
  96 #define DEFAULT_BAUD_RATE  115200
  97
  98
  99 /* Transmit states  */
 100 #define XMIT_SENDING    1
 101 #define XMIT_WAKEUP     2
 102 #define XMIT_WAITING    8
 103
 104 /* Receiver states */
 105 #define RECV_WAIT_PACKET_TYPE   0
 106 #define RECV_WAIT_EVENT_HEADER  1
 107 #define RECV_WAIT_ACL_HEADER    2
 108 #define RECV_WAIT_SCO_HEADER    3
 109 #define RECV_WAIT_DATA          4
 110
 111
 112
 113 /* ======================== Interrupt handling ======================== */
 114
 115
 116 static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
 117 {
 118         int actual = 0;
 119
 120         /* Tx FIFO should be empty */
 121         if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
 122                 return 0;
 123
 124         /* Fill FIFO with current frame */
 125         while ((fifo_size-- > 0) && (actual < len)) {
 126                 /* Transmit next byte */
 127                 outb(buf[actual], iobase + UART_TX);
 128                 actual++;
 129         }
 130
 131         return actual;
 132 }
 133
 134
 135 static void btuart_write_wakeup(btuart_info_t *info)
 136 {
 137         if (!info) {
 138                 BT_ERR("Unknown device");
 139                 return;
 140         }
 141
 142         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
 143                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 144                 return;
 145         }
 146
 147         do {
 148                 register unsigned int iobase = info->p_dev->io.BasePort1;
 149                 register struct sk_buff *skb;
 150                 register int len;
 151
 152                 clear_bit(XMIT_WAKEUP, &(info->tx_state));
 153
 154                 if (!pcmcia_dev_present(info->p_dev))
 155                         return;
 156
 157                 if (!(skb = skb_dequeue(&(info->txq))))
 158                         break;
 159
 160                 /* Send frame */
 161                 len = btuart_write(iobase, 16, skb->data, skb->len);
 162                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 163
 164                 if (len == skb->len) {
 165                         kfree_skb(skb);
 166                 } else {
 167                         skb_pull(skb, len);
 168                         skb_queue_head(&(info->txq), skb);
 169                 }
 170
 171                 info->hdev->stat.byte_tx += len;
 172
 173         } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
 174
 175         clear_bit(XMIT_SENDING, &(info->tx_state));
 176 }
 177
 178
 179 static void btuart_receive(btuart_info_t *info)
 180 {
 181         unsigned int iobase;
 182         int boguscount = 0;
 183
 184         if (!info) {
 185                 BT_ERR("Unknown device");
 186                 return;
 187         }
 188
 189         iobase = info->p_dev->io.BasePort1;
 190
 191         do {
 192                 info->hdev->stat.byte_rx++;
 193
 194                 /* Allocate packet */
 195                 if (info->rx_skb == NULL) {
 196                         info->rx_state = RECV_WAIT_PACKET_TYPE;
 197                         info->rx_count = 0;
 198                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 199                                 BT_ERR("Can't allocate mem for new packet");
 200                                 return;
 201                         }
 202                 }
 203
 204                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
 205
 206                         info->rx_skb->dev = (void *) info->hdev;
 207                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX);
 208
 209                         switch (bt_cb(info->rx_skb)->pkt_type) {
 210
 211                         case HCI_EVENT_PKT:
 212                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
 213                                 info->rx_count = HCI_EVENT_HDR_SIZE;
 214                                 break;
 215
 216                         case HCI_ACLDATA_PKT:
 217                                 info->rx_state = RECV_WAIT_ACL_HEADER;
 218                                 info->rx_count = HCI_ACL_HDR_SIZE;
 219                                 break;
 220
 221                         case HCI_SCODATA_PKT:
 222                                 info->rx_state = RECV_WAIT_SCO_HEADER;
 223                                 info->rx_count = HCI_SCO_HDR_SIZE;
 224                                 break;
 225
 226                         default:
 227                                 /* Unknown packet */
 228                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
 229                                 info->hdev->stat.err_rx++;
 230                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
 231
 232                                 kfree_skb(info->rx_skb);
 233                                 info->rx_skb = NULL;
 234                                 break;
 235
 236                         }
 237
 238                 } else {
 239
 240                         *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
 241                         info->rx_count--;
 242
 243                         if (info->rx_count == 0) {
 244
 245                                 int dlen;
 246                                 struct hci_event_hdr *eh;
 247                                 struct hci_acl_hdr *ah;
 248                                 struct hci_sco_hdr *sh;
 249
 250
 251                                 switch (info->rx_state) {
 252
 253                                 case RECV_WAIT_EVENT_HEADER:
 254                                         eh = (struct hci_event_hdr *)(info->rx_skb->data);
 255                                         info->rx_state = RECV_WAIT_DATA;
 256                                         info->rx_count = eh->plen;
 257                                         break;
 258
 259                                 case RECV_WAIT_ACL_HEADER:
 260                                         ah = (struct hci_acl_hdr *)(info->rx_skb->data);
 261                                         dlen = __le16_to_cpu(ah->dlen);
 262                                         info->rx_state = RECV_WAIT_DATA;
 263                                         info->rx_count = dlen;
 264                                         break;
 265
 266                                 case RECV_WAIT_SCO_HEADER:
 267                                         sh = (struct hci_sco_hdr *)(info->rx_skb->data);
 268                                         info->rx_state = RECV_WAIT_DATA;
 269                                         info->rx_count = sh->dlen;
 270                                         break;
 271
 272                                 case RECV_WAIT_DATA:
 273                                         hci_recv_frame(info->rx_skb);
 274                                         info->rx_skb = NULL;
 275                                         break;
 276
 277                                 }
 278
 279                         }
 280
 281                 }
 282
 283                 /* Make sure we don't stay here too long */
 284                 if (boguscount++ > 16)
 285                         break;
 286
 287         } while (inb(iobase + UART_LSR) & UART_LSR_DR);
 288 }
 289
 290
 291 static irqreturn_t btuart_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
 292 {
 293         btuart_info_t *info = dev_inst;
 294         unsigned int iobase;
 295         int boguscount = 0;
 296         int iir, lsr;
 297
 298         if (!info || !info->hdev) {
 299                 BT_ERR("Call of irq %d for unknown device", irq);
 300                 return IRQ_NONE;
 301         }
 302
 303         iobase = info->p_dev->io.BasePort1;
 304
 305         spin_lock(&(info->lock));
 306
 307         iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 308         while (iir) {
 309
 310                 /* Clear interrupt */
 311                 lsr = inb(iobase + UART_LSR);
 312
 313                 switch (iir) {
 314                 case UART_IIR_RLSI:
 315                         BT_ERR("RLSI");
 316                         break;
 317                 case UART_IIR_RDI:
 318                         /* Receive interrupt */
 319                         btuart_receive(info);
 320                         break;
 321                 case UART_IIR_THRI:
 322                         if (lsr & UART_LSR_THRE) {
 323                                 /* Transmitter ready for data */
 324                                 btuart_write_wakeup(info);
 325                         }
 326                         break;
 327                 default:
 328                         BT_ERR("Unhandled IIR=%#x", iir);
 329                         break;
 330                 }
 331
 332                 /* Make sure we don't stay here too long */
 333                 if (boguscount++ > 100)
 334                         break;
 335
 336                 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 337
 338         }
 339
 340         spin_unlock(&(info->lock));
 341
 342         return IRQ_HANDLED;
 343 }
 344
 345
 346 static void btuart_change_speed(btuart_info_t *info, unsigned int speed)
 347 {
 348         unsigned long flags;
 349         unsigned int iobase;
 350         int fcr;                /* FIFO control reg */
 351         int lcr;                /* Line control reg */
 352         int divisor;
 353
 354         if (!info) {
 355                 BT_ERR("Unknown device");
 356                 return;
 357         }
 358
 359         iobase = info->p_dev->io.BasePort1;
 360
 361         spin_lock_irqsave(&(info->lock), flags);
 362
 363         /* Turn off interrupts */
 364         outb(0, iobase + UART_IER);
 365
 366         divisor = SPEED_MAX / speed;
 367
 368         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT;
 369
 370         /*
 371          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
 372          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
 373          * about this timeout since it will always be fast enough.
 374          */
 375
 376         if (speed < 38400)
 377                 fcr |= UART_FCR_TRIGGER_1;
 378         else
 379                 fcr |= UART_FCR_TRIGGER_14;
 380
 381         /* Bluetooth cards use 8N1 */
 382         lcr = UART_LCR_WLEN8;
 383
 384         outb(UART_LCR_DLAB | lcr, iobase + UART_LCR);   /* Set DLAB */
 385         outb(divisor & 0xff, iobase + UART_DLL);        /* Set speed */
 386         outb(divisor >> 8, iobase + UART_DLM);
 387         outb(lcr, iobase + UART_LCR);   /* Set 8N1  */
 388         outb(fcr, iobase + UART_FCR);   /* Enable FIFO's */
 389
 390         /* Turn on interrups */
 391         outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
 392
 393         spin_unlock_irqrestore(&(info->lock), flags);
 394 }
 395
 396
 397
 398 /* ======================== HCI interface ======================== */
 399
 400
 401 static int btuart_hci_flush(struct hci_dev *hdev)
 402 {
 403         btuart_info_t *info = (btuart_info_t *)(hdev->driver_data);
 404
 405         /* Drop TX queue */
 406         skb_queue_purge(&(info->txq));
 407
 408         return 0;
 409 }
 410
 411
 412 static int btuart_hci_open(struct hci_dev *hdev)
 413 {
 414         set_bit(HCI_RUNNING, &(hdev->flags));
 415
 416         return 0;
 417 }
 418
 419
 420 static int btuart_hci_close(struct hci_dev *hdev)
 421 {
 422         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 423                 return 0;
 424
 425         btuart_hci_flush(hdev);
 426
 427         return 0;
 428 }
 429
 430
 431 static int btuart_hci_send_frame(struct sk_buff *skb)
 432 {
 433         btuart_info_t *info;
 434         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
 435
 436         if (!hdev) {
 437                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 438                 return -ENODEV;
 439         }
 440
 441         info = (btuart_info_t *)(hdev->driver_data);
 442
 443         switch (bt_cb(skb)->pkt_type) {
 444         case HCI_COMMAND_PKT:
 445                 hdev->stat.cmd_tx++;
 446                 break;
 447         case HCI_ACLDATA_PKT:
 448                 hdev->stat.acl_tx++;
 449                 break;
 450         case HCI_SCODATA_PKT:
 451                 hdev->stat.sco_tx++;
 452                 break;
 453         };
 454
 455         /* Prepend skb with frame type */
 456         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 457         skb_queue_tail(&(info->txq), skb);
 458
 459         btuart_write_wakeup(info);
 460
 461         return 0;
 462 }
 463
 464
 465 static void btuart_hci_destruct(struct hci_dev *hdev)
 466 {
 467 }
 468
 469
 470 static int btuart_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 471 {
 472         return -ENOIOCTLCMD;
 473 }
 474
 475
 476
 477 /* ======================== Card services HCI interaction ======================== */
 478
 479
 480 static int btuart_open(btuart_info_t *info)
 481 {
 482         unsigned long flags;
 483         unsigned int iobase = info->p_dev->io.BasePort1;
 484         struct hci_dev *hdev;
 485
 486         spin_lock_init(&(info->lock));
 487
 488         skb_queue_head_init(&(info->txq));
 489
 490         info->rx_state = RECV_WAIT_PACKET_TYPE;
 491         info->rx_count = 0;
 492         info->rx_skb = NULL;
 493
 494         /* Initialize HCI device */
 495         hdev = hci_alloc_dev();
 496         if (!hdev) {
 497                 BT_ERR("Can't allocate HCI device");
 498                 return -ENOMEM;
 499         }
 500
 501         info->hdev = hdev;
 502
 503         hdev->type = HCI_PCCARD;
 504         hdev->driver_data = info;
 505         SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
 506
 507         hdev->open     = btuart_hci_open;
 508         hdev->close    = btuart_hci_close;
 509         hdev->flush    = btuart_hci_flush;
 510         hdev->send     = btuart_hci_send_frame;
 511         hdev->destruct = btuart_hci_destruct;
 512         hdev->ioctl    = btuart_hci_ioctl;
 513
 514         hdev->owner = THIS_MODULE;
 515
 516         spin_lock_irqsave(&(info->lock), flags);
 517
 518         /* Reset UART */
 519         outb(0, iobase + UART_MCR);
 520
 521         /* Turn off interrupts */
 522         outb(0, iobase + UART_IER);
 523
 524         /* Initialize UART */
 525         outb(UART_LCR_WLEN8, iobase + UART_LCR);        /* Reset DLAB */
 526         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
 527
 528         /* Turn on interrupts */
 529         // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
 530
 531         spin_unlock_irqrestore(&(info->lock), flags);
 532
 533         btuart_change_speed(info, DEFAULT_BAUD_RATE);
 534
 535         /* Timeout before it is safe to send the first HCI packet */
 536         msleep(1000);
 537
 538         /* Register HCI device */
 539         if (hci_register_dev(hdev) < 0) {
 540                 BT_ERR("Can't register HCI device");
 541                 info->hdev = NULL;
 542                 hci_free_dev(hdev);
 543                 return -ENODEV;
 544         }
 545
 546         return 0;
 547 }
 548
 549
 550 static int btuart_close(btuart_info_t *info)
 551 {
 552         unsigned long flags;
 553         unsigned int iobase = info->p_dev->io.BasePort1;
 554         struct hci_dev *hdev = info->hdev;
 555
 556         if (!hdev)
 557                 return -ENODEV;
 558
 559         btuart_hci_close(hdev);
 560
 561         spin_lock_irqsave(&(info->lock), flags);
 562
 563         /* Reset UART */
 564         outb(0, iobase + UART_MCR);
 565
 566         /* Turn off interrupts */
 567         outb(0, iobase + UART_IER);
 568
 569         spin_unlock_irqrestore(&(info->lock), flags);
 570
 571         if (hci_unregister_dev(hdev) < 0)
 572                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 573
 574         hci_free_dev(hdev);
 575
 576         return 0;
 577 }
 578
 579 static int btuart_probe(struct pcmcia_device *link)
 580 {
 581         btuart_info_t *info;
 582
 583         /* Create new info device */
 584         info = kzalloc(sizeof(*info), GFP_KERNEL);
 585         if (!info)
 586                 return -ENOMEM;
 587
 588         info->p_dev = link;
 589         link->priv = info;
 590
 591         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 592         link->io.NumPorts1 = 8;
 593         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 594         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 595
 596         link->irq.Handler = btuart_interrupt;
 597         link->irq.Instance = info;
 598
 599         link->conf.Attributes = CONF_ENABLE_IRQ;
 600         link->conf.IntType = INT_MEMORY_AND_IO;
 601
 602         return btuart_config(link);
 603 }
 604
 605
 606 static void btuart_detach(struct pcmcia_device *link)
 607 {
 608         btuart_info_t *info = link->priv;
 609
 610         btuart_release(link);
 611         kfree(info);
 612 }
 613
 614 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 615 {
 616         int i;
 617
 618         i = pcmcia_get_tuple_data(handle, tuple);
 619         if (i != CS_SUCCESS)
 620                 return i;
 621
 622         return pcmcia_parse_tuple(handle, tuple, parse);
 623 }
 624
 625 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 626 {
 627         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
 628                 return CS_NO_MORE_ITEMS;
 629         return get_tuple(handle, tuple, parse);
 630 }
 631
 632 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 633 {
 634         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
 635                 return CS_NO_MORE_ITEMS;
 636         return get_tuple(handle, tuple, parse);
 637 }
 638
 639 static int btuart_config(struct pcmcia_device *link)
 640 {
 641         static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
 642         btuart_info_t *info = link->priv;
 643         tuple_t tuple;
 644         u_short buf[256];
 645         cisparse_t parse;
 646         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 647         int i, j, try, last_ret, last_fn;
 648
 649         tuple.TupleData = (cisdata_t *)buf;
 650         tuple.TupleOffset = 0;
 651         tuple.TupleDataMax = 255;
 652         tuple.Attributes = 0;
 653
 654         /* Get configuration register information */
 655         tuple.DesiredTuple = CISTPL_CONFIG;
 656         last_ret = first_tuple(link, &tuple, &parse);
 657         if (last_ret != CS_SUCCESS) {
 658                 last_fn = ParseTuple;
 659                 goto cs_failed;
 660         }
 661         link->conf.ConfigBase = parse.config.base;
 662         link->conf.Present = parse.config.rmask[0];
 663
 664         /* First pass: look for a config entry that looks normal. */
 665         tuple.TupleData = (cisdata_t *) buf;
 666         tuple.TupleOffset = 0;
 667         tuple.TupleDataMax = 255;
 668         tuple.Attributes = 0;
 669         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 670         /* Two tries: without IO aliases, then with aliases */
 671         for (try = 0; try < 2; try++) {
 672                 i = first_tuple(link, &tuple, &parse);
 673                 while (i != CS_NO_MORE_ITEMS) {
 674                         if (i != CS_SUCCESS)
 675                                 goto next_entry;
 676                         if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
 677                                 link->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
 678                         if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) {
 679                                 link->conf.ConfigIndex = cf->index;
 680                                 link->io.BasePort1 = cf->io.win[0].base;
 681                                 link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK;
 682                                 i = pcmcia_request_io(link, &link->io);
 683                                 if (i == CS_SUCCESS)
 684                                         goto found_port;
 685                         }
 686 next_entry:
 687                         i = next_tuple(link, &tuple, &parse);
 688                 }
 689         }
 690
 691         /* Second pass: try to find an entry that isn't picky about
 692            its base address, then try to grab any standard serial port
 693            address, and finally try to get any free port. */
 694         i = first_tuple(link, &tuple, &parse);
 695         while (i != CS_NO_MORE_ITEMS) {
 696                 if ((i == CS_SUCCESS) && (cf->io.nwin > 0)
 697                     && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
 698                         link->conf.ConfigIndex = cf->index;
 699                         for (j = 0; j < 5; j++) {
 700                                 link->io.BasePort1 = base[j];
 701                                 link->io.IOAddrLines = base[j] ? 16 : 3;
 702                                 i = pcmcia_request_io(link, &link->io);
 703                                 if (i == CS_SUCCESS)
 704                                         goto found_port;
 705                         }
 706                 }
 707                 i = next_tuple(link, &tuple, &parse);
 708         }
 709
 710 found_port:
 711         if (i != CS_SUCCESS) {
 712                 BT_ERR("No usable port range found");
 713                 cs_error(link, RequestIO, i);
 714                 goto failed;
 715         }
 716
 717         i = pcmcia_request_irq(link, &link->irq);
 718         if (i != CS_SUCCESS) {
 719                 cs_error(link, RequestIRQ, i);
 720                 link->irq.AssignedIRQ = 0;
 721         }
 722
 723         i = pcmcia_request_configuration(link, &link->conf);
 724         if (i != CS_SUCCESS) {
 725                 cs_error(link, RequestConfiguration, i);
 726                 goto failed;
 727         }
 728
 729         if (btuart_open(info) != 0)
 730                 goto failed;
 731
 732         strcpy(info->node.dev_name, info->hdev->name);
 733         link->dev_node = &info->node;
 734
 735         return 0;
 736
 737 cs_failed:
 738         cs_error(link, last_fn, last_ret);
 739
 740 failed:
 741         btuart_release(link);
 742         return -ENODEV;
 743 }
 744
 745
 746 static void btuart_release(struct pcmcia_device *link)
 747 {
 748         btuart_info_t *info = link->priv;
 749
 750         btuart_close(info);
 751
 752         pcmcia_disable_device(link);
 753 }
 754
 755 static struct pcmcia_device_id btuart_ids[] = {
 756         /* don't use this driver. Use serial_cs + hci_uart instead */
 757         PCMCIA_DEVICE_NULL
 758 };
 759 MODULE_DEVICE_TABLE(pcmcia, btuart_ids);
 760
 761 static struct pcmcia_driver btuart_driver = {
 762         .owner          = THIS_MODULE,
 763         .drv            = {
 764                 .name   = "btuart_cs",
 765         },
 766         .probe          = btuart_probe,
 767         .remove         = btuart_detach,
 768         .id_table       = btuart_ids,
 769 };
 770
 771 static int __init init_btuart_cs(void)
 772 {
 773         return pcmcia_register_driver(&btuart_driver);
 774 }
 775
 776
 777 static void __exit exit_btuart_cs(void)
 778 {
 779         pcmcia_unregister_driver(&btuart_driver);
 780 }
 781
 782 module_init(init_btuart_cs);
 783 module_exit(exit_btuart_cs);