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/delay.h>
  30 #include <linux/errno.h>
  31 #include <linux/ptrace.h>
  32 #include <linux/ioport.h>
  33 #include <linux/spinlock.h>
  34 #include <linux/moduleparam.h>
  35
  36 #include <linux/skbuff.h>
  37 #include <linux/string.h>
  38 #include <linux/serial.h>
  39 #include <linux/serial_reg.h>
  40 #include <linux/bitops.h>
  41 #include <asm/system.h>
  42 #include <asm/io.h>
  43
  44 #include <pcmcia/cs_types.h>
  45 #include <pcmcia/cs.h>
  46 #include <pcmcia/cistpl.h>
  47 #include <pcmcia/ciscode.h>
  48 #include <pcmcia/ds.h>
  49 #include <pcmcia/cisreg.h>
  50
  51 #include <net/bluetooth/bluetooth.h>
  52 #include <net/bluetooth/hci_core.h>
  53
  54
  55
  56 /* ======================== Module parameters ======================== */
  57
  58
  59 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
  60 MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface");
  61 MODULE_LICENSE("GPL");
  62
  63
  64
  65 /* ======================== Local structures ======================== */
  66
  67
  68 typedef struct btuart_info_t {
  69         struct pcmcia_device *p_dev;
  70         dev_node_t node;
  71
  72         struct hci_dev *hdev;
  73
  74         spinlock_t lock;        /* For serializing operations */
  75
  76         struct sk_buff_head txq;
  77         unsigned long tx_state;
  78
  79         unsigned long rx_state;
  80         unsigned long rx_count;
  81         struct sk_buff *rx_skb;
  82 } btuart_info_t;
  83
  84
  85 static int btuart_config(struct pcmcia_device *link);
  86 static void btuart_release(struct pcmcia_device *link);
  87
  88 static void btuart_detach(struct pcmcia_device *p_dev);
  89
  90
  91 /* Maximum baud rate */
  92 #define SPEED_MAX  115200
  93
  94 /* Default baud rate: 57600, 115200, 230400 or 460800 */
  95 #define DEFAULT_BAUD_RATE  115200
  96
  97
  98 /* Transmit states  */
  99 #define XMIT_SENDING    1
 100 #define XMIT_WAKEUP     2
 101 #define XMIT_WAITING    8
 102
 103 /* Receiver states */
 104 #define RECV_WAIT_PACKET_TYPE   0
 105 #define RECV_WAIT_EVENT_HEADER  1
 106 #define RECV_WAIT_ACL_HEADER    2
 107 #define RECV_WAIT_SCO_HEADER    3
 108 #define RECV_WAIT_DATA          4
 109
 110
 111
 112 /* ======================== Interrupt handling ======================== */
 113
 114
 115 static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
 116 {
 117         int actual = 0;
 118
 119         /* Tx FIFO should be empty */
 120         if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
 121                 return 0;
 122
 123         /* Fill FIFO with current frame */
 124         while ((fifo_size-- > 0) && (actual < len)) {
 125                 /* Transmit next byte */
 126                 outb(buf[actual], iobase + UART_TX);
 127                 actual++;
 128         }
 129
 130         return actual;
 131 }
 132
 133
 134 static void btuart_write_wakeup(btuart_info_t *info)
 135 {
 136         if (!info) {
 137                 BT_ERR("Unknown device");
 138                 return;
 139         }
 140
 141         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
 142                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 143                 return;
 144         }
 145
 146         do {
 147                 register unsigned int iobase = info->p_dev->io.BasePort1;
 148                 register struct sk_buff *skb;
 149                 register int len;
 150
 151                 clear_bit(XMIT_WAKEUP, &(info->tx_state));
 152
 153                 if (!pcmcia_dev_present(info->p_dev))
 154                         return;
 155
 156                 if (!(skb = skb_dequeue(&(info->txq))))
 157                         break;
 158
 159                 /* Send frame */
 160                 len = btuart_write(iobase, 16, skb->data, skb->len);
 161                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 162
 163                 if (len == skb->len) {
 164                         kfree_skb(skb);
 165                 } else {
 166                         skb_pull(skb, len);
 167                         skb_queue_head(&(info->txq), skb);
 168                 }
 169
 170                 info->hdev->stat.byte_tx += len;
 171
 172         } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
 173
 174         clear_bit(XMIT_SENDING, &(info->tx_state));
 175 }
 176
 177
 178 static void btuart_receive(btuart_info_t *info)
 179 {
 180         unsigned int iobase;
 181         int boguscount = 0;
 182
 183         if (!info) {
 184                 BT_ERR("Unknown device");
 185                 return;
 186         }
 187
 188         iobase = info->p_dev->io.BasePort1;
 189
 190         do {
 191                 info->hdev->stat.byte_rx++;
 192
 193                 /* Allocate packet */
 194                 if (info->rx_skb == NULL) {
 195                         info->rx_state = RECV_WAIT_PACKET_TYPE;
 196                         info->rx_count = 0;
 197                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 198                                 BT_ERR("Can't allocate mem for new packet");
 199                                 return;
 200                         }
 201                 }
 202
 203                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
 204
 205                         info->rx_skb->dev = (void *) info->hdev;
 206                         bt_cb(info->rx_skb)->pkt_type = inb(iobase + UART_RX);
 207
 208                         switch (bt_cb(info->rx_skb)->pkt_type) {
 209
 210                         case HCI_EVENT_PKT:
 211                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
 212                                 info->rx_count = HCI_EVENT_HDR_SIZE;
 213                                 break;
 214
 215                         case HCI_ACLDATA_PKT:
 216                                 info->rx_state = RECV_WAIT_ACL_HEADER;
 217                                 info->rx_count = HCI_ACL_HDR_SIZE;
 218                                 break;
 219
 220                         case HCI_SCODATA_PKT:
 221                                 info->rx_state = RECV_WAIT_SCO_HEADER;
 222                                 info->rx_count = HCI_SCO_HDR_SIZE;
 223                                 break;
 224
 225                         default:
 226                                 /* Unknown packet */
 227                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
 228                                 info->hdev->stat.err_rx++;
 229                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
 230
 231                                 kfree_skb(info->rx_skb);
 232                                 info->rx_skb = NULL;
 233                                 break;
 234
 235                         }
 236
 237                 } else {
 238
 239                         *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
 240                         info->rx_count--;
 241
 242                         if (info->rx_count == 0) {
 243
 244                                 int dlen;
 245                                 struct hci_event_hdr *eh;
 246                                 struct hci_acl_hdr *ah;
 247                                 struct hci_sco_hdr *sh;
 248
 249
 250                                 switch (info->rx_state) {
 251
 252                                 case RECV_WAIT_EVENT_HEADER:
 253                                         eh = (struct hci_event_hdr *)(info->rx_skb->data);
 254                                         info->rx_state = RECV_WAIT_DATA;
 255                                         info->rx_count = eh->plen;
 256                                         break;
 257
 258                                 case RECV_WAIT_ACL_HEADER:
 259                                         ah = (struct hci_acl_hdr *)(info->rx_skb->data);
 260                                         dlen = __le16_to_cpu(ah->dlen);
 261                                         info->rx_state = RECV_WAIT_DATA;
 262                                         info->rx_count = dlen;
 263                                         break;
 264
 265                                 case RECV_WAIT_SCO_HEADER:
 266                                         sh = (struct hci_sco_hdr *)(info->rx_skb->data);
 267                                         info->rx_state = RECV_WAIT_DATA;
 268                                         info->rx_count = sh->dlen;
 269                                         break;
 270
 271                                 case RECV_WAIT_DATA:
 272                                         hci_recv_frame(info->rx_skb);
 273                                         info->rx_skb = NULL;
 274                                         break;
 275
 276                                 }
 277
 278                         }
 279
 280                 }
 281
 282                 /* Make sure we don't stay here too long */
 283                 if (boguscount++ > 16)
 284                         break;
 285
 286         } while (inb(iobase + UART_LSR) & UART_LSR_DR);
 287 }
 288
 289
 290 static irqreturn_t btuart_interrupt(int irq, void *dev_inst)
 291 {
 292         btuart_info_t *info = dev_inst;
 293         unsigned int iobase;
 294         int boguscount = 0;
 295         int iir, lsr;
 296
 297         if (!info || !info->hdev) {
 298                 BT_ERR("Call of irq %d for unknown device", irq);
 299                 return IRQ_NONE;
 300         }
 301
 302         iobase = info->p_dev->io.BasePort1;
 303
 304         spin_lock(&(info->lock));
 305
 306         iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 307         while (iir) {
 308
 309                 /* Clear interrupt */
 310                 lsr = inb(iobase + UART_LSR);
 311
 312                 switch (iir) {
 313                 case UART_IIR_RLSI:
 314                         BT_ERR("RLSI");
 315                         break;
 316                 case UART_IIR_RDI:
 317                         /* Receive interrupt */
 318                         btuart_receive(info);
 319                         break;
 320                 case UART_IIR_THRI:
 321                         if (lsr & UART_LSR_THRE) {
 322                                 /* Transmitter ready for data */
 323                                 btuart_write_wakeup(info);
 324                         }
 325                         break;
 326                 default:
 327                         BT_ERR("Unhandled IIR=%#x", iir);
 328                         break;
 329                 }
 330
 331                 /* Make sure we don't stay here too long */
 332                 if (boguscount++ > 100)
 333                         break;
 334
 335                 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 336
 337         }
 338
 339         spin_unlock(&(info->lock));
 340
 341         return IRQ_HANDLED;
 342 }
 343
 344
 345 static void btuart_change_speed(btuart_info_t *info, unsigned int speed)
 346 {
 347         unsigned long flags;
 348         unsigned int iobase;
 349         int fcr;                /* FIFO control reg */
 350         int lcr;                /* Line control reg */
 351         int divisor;
 352
 353         if (!info) {
 354                 BT_ERR("Unknown device");
 355                 return;
 356         }
 357
 358         iobase = info->p_dev->io.BasePort1;
 359
 360         spin_lock_irqsave(&(info->lock), flags);
 361
 362         /* Turn off interrupts */
 363         outb(0, iobase + UART_IER);
 364
 365         divisor = SPEED_MAX / speed;
 366
 367         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT;
 368
 369         /*
 370          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
 371          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
 372          * about this timeout since it will always be fast enough.
 373          */
 374
 375         if (speed < 38400)
 376                 fcr |= UART_FCR_TRIGGER_1;
 377         else
 378                 fcr |= UART_FCR_TRIGGER_14;
 379
 380         /* Bluetooth cards use 8N1 */
 381         lcr = UART_LCR_WLEN8;
 382
 383         outb(UART_LCR_DLAB | lcr, iobase + UART_LCR);   /* Set DLAB */
 384         outb(divisor & 0xff, iobase + UART_DLL);        /* Set speed */
 385         outb(divisor >> 8, iobase + UART_DLM);
 386         outb(lcr, iobase + UART_LCR);   /* Set 8N1  */
 387         outb(fcr, iobase + UART_FCR);   /* Enable FIFO's */
 388
 389         /* Turn on interrups */
 390         outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
 391
 392         spin_unlock_irqrestore(&(info->lock), flags);
 393 }
 394
 395
 396
 397 /* ======================== HCI interface ======================== */
 398
 399
 400 static int btuart_hci_flush(struct hci_dev *hdev)
 401 {
 402         btuart_info_t *info = (btuart_info_t *)(hdev->driver_data);
 403
 404         /* Drop TX queue */
 405         skb_queue_purge(&(info->txq));
 406
 407         return 0;
 408 }
 409
 410
 411 static int btuart_hci_open(struct hci_dev *hdev)
 412 {
 413         set_bit(HCI_RUNNING, &(hdev->flags));
 414
 415         return 0;
 416 }
 417
 418
 419 static int btuart_hci_close(struct hci_dev *hdev)
 420 {
 421         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 422                 return 0;
 423
 424         btuart_hci_flush(hdev);
 425
 426         return 0;
 427 }
 428
 429
 430 static int btuart_hci_send_frame(struct sk_buff *skb)
 431 {
 432         btuart_info_t *info;
 433         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
 434
 435         if (!hdev) {
 436                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 437                 return -ENODEV;
 438         }
 439
 440         info = (btuart_info_t *)(hdev->driver_data);
 441
 442         switch (bt_cb(skb)->pkt_type) {
 443         case HCI_COMMAND_PKT:
 444                 hdev->stat.cmd_tx++;
 445                 break;
 446         case HCI_ACLDATA_PKT:
 447                 hdev->stat.acl_tx++;
 448                 break;
 449         case HCI_SCODATA_PKT:
 450                 hdev->stat.sco_tx++;
 451                 break;
 452         };
 453
 454         /* Prepend skb with frame type */
 455         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 456         skb_queue_tail(&(info->txq), skb);
 457
 458         btuart_write_wakeup(info);
 459
 460         return 0;
 461 }
 462
 463
 464 static void btuart_hci_destruct(struct hci_dev *hdev)
 465 {
 466 }
 467
 468
 469 static int btuart_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 470 {
 471         return -ENOIOCTLCMD;
 472 }
 473
 474
 475
 476 /* ======================== Card services HCI interaction ======================== */
 477
 478
 479 static int btuart_open(btuart_info_t *info)
 480 {
 481         unsigned long flags;
 482         unsigned int iobase = info->p_dev->io.BasePort1;
 483         struct hci_dev *hdev;
 484
 485         spin_lock_init(&(info->lock));
 486
 487         skb_queue_head_init(&(info->txq));
 488
 489         info->rx_state = RECV_WAIT_PACKET_TYPE;
 490         info->rx_count = 0;
 491         info->rx_skb = NULL;
 492
 493         /* Initialize HCI device */
 494         hdev = hci_alloc_dev();
 495         if (!hdev) {
 496                 BT_ERR("Can't allocate HCI device");
 497                 return -ENOMEM;
 498         }
 499
 500         info->hdev = hdev;
 501
 502         hdev->type = HCI_PCCARD;
 503         hdev->driver_data = info;
 504         SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
 505
 506         hdev->open     = btuart_hci_open;
 507         hdev->close    = btuart_hci_close;
 508         hdev->flush    = btuart_hci_flush;
 509         hdev->send     = btuart_hci_send_frame;
 510         hdev->destruct = btuart_hci_destruct;
 511         hdev->ioctl    = btuart_hci_ioctl;
 512
 513         hdev->owner = THIS_MODULE;
 514
 515         spin_lock_irqsave(&(info->lock), flags);
 516
 517         /* Reset UART */
 518         outb(0, iobase + UART_MCR);
 519
 520         /* Turn off interrupts */
 521         outb(0, iobase + UART_IER);
 522
 523         /* Initialize UART */
 524         outb(UART_LCR_WLEN8, iobase + UART_LCR);        /* Reset DLAB */
 525         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
 526
 527         /* Turn on interrupts */
 528         // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
 529
 530         spin_unlock_irqrestore(&(info->lock), flags);
 531
 532         btuart_change_speed(info, DEFAULT_BAUD_RATE);
 533
 534         /* Timeout before it is safe to send the first HCI packet */
 535         msleep(1000);
 536
 537         /* Register HCI device */
 538         if (hci_register_dev(hdev) < 0) {
 539                 BT_ERR("Can't register HCI device");
 540                 info->hdev = NULL;
 541                 hci_free_dev(hdev);
 542                 return -ENODEV;
 543         }
 544
 545         return 0;
 546 }
 547
 548
 549 static int btuart_close(btuart_info_t *info)
 550 {
 551         unsigned long flags;
 552         unsigned int iobase = info->p_dev->io.BasePort1;
 553         struct hci_dev *hdev = info->hdev;
 554
 555         if (!hdev)
 556                 return -ENODEV;
 557
 558         btuart_hci_close(hdev);
 559
 560         spin_lock_irqsave(&(info->lock), flags);
 561
 562         /* Reset UART */
 563         outb(0, iobase + UART_MCR);
 564
 565         /* Turn off interrupts */
 566         outb(0, iobase + UART_IER);
 567
 568         spin_unlock_irqrestore(&(info->lock), flags);
 569
 570         if (hci_unregister_dev(hdev) < 0)
 571                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 572
 573         hci_free_dev(hdev);
 574
 575         return 0;
 576 }
 577
 578 static int btuart_probe(struct pcmcia_device *link)
 579 {
 580         btuart_info_t *info;
 581
 582         /* Create new info device */
 583         info = kzalloc(sizeof(*info), GFP_KERNEL);
 584         if (!info)
 585                 return -ENOMEM;
 586
 587         info->p_dev = link;
 588         link->priv = info;
 589
 590         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 591         link->io.NumPorts1 = 8;
 592         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 593         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 594
 595         link->irq.Handler = btuart_interrupt;
 596         link->irq.Instance = info;
 597
 598         link->conf.Attributes = CONF_ENABLE_IRQ;
 599         link->conf.IntType = INT_MEMORY_AND_IO;
 600
 601         return btuart_config(link);
 602 }
 603
 604
 605 static void btuart_detach(struct pcmcia_device *link)
 606 {
 607         btuart_info_t *info = link->priv;
 608
 609         btuart_release(link);
 610         kfree(info);
 611 }
 612
 613 static int get_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 614 {
 615         int i;
 616
 617         i = pcmcia_get_tuple_data(handle, tuple);
 618         if (i != CS_SUCCESS)
 619                 return i;
 620
 621         return pcmcia_parse_tuple(handle, tuple, parse);
 622 }
 623
 624 static int first_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 625 {
 626         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
 627                 return CS_NO_MORE_ITEMS;
 628         return get_tuple(handle, tuple, parse);
 629 }
 630
 631 static int next_tuple(struct pcmcia_device *handle, tuple_t *tuple, cisparse_t *parse)
 632 {
 633         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
 634                 return CS_NO_MORE_ITEMS;
 635         return get_tuple(handle, tuple, parse);
 636 }
 637
 638 static int btuart_config(struct pcmcia_device *link)
 639 {
 640         static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
 641         btuart_info_t *info = link->priv;
 642         tuple_t tuple;
 643         u_short buf[256];
 644         cisparse_t parse;
 645         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 646         int i, j, try;
 647
 648         /* First pass: look for a config entry that looks normal. */
 649         tuple.TupleData = (cisdata_t *) buf;
 650         tuple.TupleOffset = 0;
 651         tuple.TupleDataMax = 255;
 652         tuple.Attributes = 0;
 653         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 654         /* Two tries: without IO aliases, then with aliases */
 655         for (try = 0; try < 2; try++) {
 656                 i = first_tuple(link, &tuple, &parse);
 657                 while (i != CS_NO_MORE_ITEMS) {
 658                         if (i != CS_SUCCESS)
 659                                 goto next_entry;
 660                         if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
 661                                 link->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
 662                         if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) {
 663                                 link->conf.ConfigIndex = cf->index;
 664                                 link->io.BasePort1 = cf->io.win[0].base;
 665                                 link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK;
 666                                 i = pcmcia_request_io(link, &link->io);
 667                                 if (i == CS_SUCCESS)
 668                                         goto found_port;
 669                         }
 670 next_entry:
 671                         i = next_tuple(link, &tuple, &parse);
 672                 }
 673         }
 674
 675         /* Second pass: try to find an entry that isn't picky about
 676            its base address, then try to grab any standard serial port
 677            address, and finally try to get any free port. */
 678         i = first_tuple(link, &tuple, &parse);
 679         while (i != CS_NO_MORE_ITEMS) {
 680                 if ((i == CS_SUCCESS) && (cf->io.nwin > 0)
 681                     && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
 682                         link->conf.ConfigIndex = cf->index;
 683                         for (j = 0; j < 5; j++) {
 684                                 link->io.BasePort1 = base[j];
 685                                 link->io.IOAddrLines = base[j] ? 16 : 3;
 686                                 i = pcmcia_request_io(link, &link->io);
 687                                 if (i == CS_SUCCESS)
 688                                         goto found_port;
 689                         }
 690                 }
 691                 i = next_tuple(link, &tuple, &parse);
 692         }
 693
 694 found_port:
 695         if (i != CS_SUCCESS) {
 696                 BT_ERR("No usable port range found");
 697                 cs_error(link, RequestIO, i);
 698                 goto failed;
 699         }
 700
 701         i = pcmcia_request_irq(link, &link->irq);
 702         if (i != CS_SUCCESS) {
 703                 cs_error(link, RequestIRQ, i);
 704                 link->irq.AssignedIRQ = 0;
 705         }
 706
 707         i = pcmcia_request_configuration(link, &link->conf);
 708         if (i != CS_SUCCESS) {
 709                 cs_error(link, RequestConfiguration, i);
 710                 goto failed;
 711         }
 712
 713         if (btuart_open(info) != 0)
 714                 goto failed;
 715
 716         strcpy(info->node.dev_name, info->hdev->name);
 717         link->dev_node = &info->node;
 718
 719         return 0;
 720
 721 failed:
 722         btuart_release(link);
 723         return -ENODEV;
 724 }
 725
 726
 727 static void btuart_release(struct pcmcia_device *link)
 728 {
 729         btuart_info_t *info = link->priv;
 730
 731         btuart_close(info);
 732
 733         pcmcia_disable_device(link);
 734 }
 735
 736 static struct pcmcia_device_id btuart_ids[] = {
 737         /* don't use this driver. Use serial_cs + hci_uart instead */
 738         PCMCIA_DEVICE_NULL
 739 };
 740 MODULE_DEVICE_TABLE(pcmcia, btuart_ids);
 741
 742 static struct pcmcia_driver btuart_driver = {
 743         .owner          = THIS_MODULE,
 744         .drv            = {
 745                 .name   = "btuart_cs",
 746         },
 747         .probe          = btuart_probe,
 748         .remove         = btuart_detach,
 749         .id_table       = btuart_ids,
 750 };
 751
 752 static int __init init_btuart_cs(void)
 753 {
 754         return pcmcia_register_driver(&btuart_driver);
 755 }
 756
 757
 758 static void __exit exit_btuart_cs(void)
 759 {
 760         pcmcia_unregister_driver(&btuart_driver);
 761 }
 762
 763 module_init(init_btuart_cs);
 764 module_exit(exit_btuart_cs);