git.oblomov.eu Git - linux-2.6/blob - drivers/bluetooth/dtl1_cs.c

   1 /*
   2  *
   3  *  A driver for Nokia Connectivity Card DTL-1 devices
   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/config.h>
  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/sched.h>
  31 #include <linux/delay.h>
  32 #include <linux/errno.h>
  33 #include <linux/ptrace.h>
  34 #include <linux/ioport.h>
  35 #include <linux/spinlock.h>
  36 #include <linux/moduleparam.h>
  37
  38 #include <linux/skbuff.h>
  39 #include <linux/string.h>
  40 #include <linux/serial.h>
  41 #include <linux/serial_reg.h>
  42 #include <linux/bitops.h>
  43 #include <asm/system.h>
  44 #include <asm/io.h>
  45
  46 #include <pcmcia/cs_types.h>
  47 #include <pcmcia/cs.h>
  48 #include <pcmcia/cistpl.h>
  49 #include <pcmcia/ciscode.h>
  50 #include <pcmcia/ds.h>
  51 #include <pcmcia/cisreg.h>
  52
  53 #include <net/bluetooth/bluetooth.h>
  54 #include <net/bluetooth/hci_core.h>
  55
  56
  57
  58 /* ======================== Module parameters ======================== */
  59
  60
  61 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
  62 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
  63 MODULE_LICENSE("GPL");
  64
  65
  66
  67 /* ======================== Local structures ======================== */
  68
  69
  70 typedef struct dtl1_info_t {
  71         dev_link_t link;
  72         dev_node_t node;
  73
  74         struct hci_dev *hdev;
  75
  76         spinlock_t lock;                /* For serializing operations */
  77
  78         unsigned long flowmask;         /* HCI flow mask */
  79         int ri_latch;
  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 } dtl1_info_t;
  88
  89
  90 static void dtl1_config(dev_link_t *link);
  91 static void dtl1_release(dev_link_t *link);
  92 static int dtl1_event(event_t event, int priority, event_callback_args_t *args);
  93
  94 static dev_info_t dev_info = "dtl1_cs";
  95
  96 static dev_link_t *dtl1_attach(void);
  97 static void dtl1_detach(dev_link_t *);
  98
  99 static dev_link_t *dev_list = NULL;
 100
 101
 102 /* Transmit states  */
 103 #define XMIT_SENDING  1
 104 #define XMIT_WAKEUP   2
 105 #define XMIT_WAITING  8
 106
 107 /* Receiver States */
 108 #define RECV_WAIT_NSH   0
 109 #define RECV_WAIT_DATA  1
 110
 111
 112 typedef struct {
 113         u8 type;
 114         u8 zero;
 115         u16 len;
 116 } __attribute__ ((packed)) nsh_t;       /* Nokia Specific Header */
 117
 118 #define NSHL  4                         /* Nokia Specific Header Length */
 119
 120
 121
 122 /* ======================== Interrupt handling ======================== */
 123
 124
 125 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
 126 {
 127         int actual = 0;
 128
 129         /* Tx FIFO should be empty */
 130         if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
 131                 return 0;
 132
 133         /* Fill FIFO with current frame */
 134         while ((fifo_size-- > 0) && (actual < len)) {
 135                 /* Transmit next byte */
 136                 outb(buf[actual], iobase + UART_TX);
 137                 actual++;
 138         }
 139
 140         return actual;
 141 }
 142
 143
 144 static void dtl1_write_wakeup(dtl1_info_t *info)
 145 {
 146         if (!info) {
 147                 BT_ERR("Unknown device");
 148                 return;
 149         }
 150
 151         if (test_bit(XMIT_WAITING, &(info->tx_state))) {
 152                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 153                 return;
 154         }
 155
 156         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
 157                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 158                 return;
 159         }
 160
 161         do {
 162                 register unsigned int iobase = info->link.io.BasePort1;
 163                 register struct sk_buff *skb;
 164                 register int len;
 165
 166                 clear_bit(XMIT_WAKEUP, &(info->tx_state));
 167
 168                 if (!(info->link.state & DEV_PRESENT))
 169                         return;
 170
 171                 if (!(skb = skb_dequeue(&(info->txq))))
 172                         break;
 173
 174                 /* Send frame */
 175                 len = dtl1_write(iobase, 32, skb->data, skb->len);
 176
 177                 if (len == skb->len) {
 178                         set_bit(XMIT_WAITING, &(info->tx_state));
 179                         kfree_skb(skb);
 180                 } else {
 181                         skb_pull(skb, len);
 182                         skb_queue_head(&(info->txq), skb);
 183                 }
 184
 185                 info->hdev->stat.byte_tx += len;
 186
 187         } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
 188
 189         clear_bit(XMIT_SENDING, &(info->tx_state));
 190 }
 191
 192
 193 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
 194 {
 195         u8 flowmask = *(u8 *)skb->data;
 196         int i;
 197
 198         printk(KERN_INFO "Bluetooth: Nokia control data =");
 199         for (i = 0; i < skb->len; i++) {
 200                 printk(" %02x", skb->data[i]);
 201         }
 202         printk("\n");
 203
 204         /* transition to active state */
 205         if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
 206                 clear_bit(XMIT_WAITING, &(info->tx_state));
 207                 dtl1_write_wakeup(info);
 208         }
 209
 210         info->flowmask = flowmask;
 211
 212         kfree_skb(skb);
 213 }
 214
 215
 216 static void dtl1_receive(dtl1_info_t *info)
 217 {
 218         unsigned int iobase;
 219         nsh_t *nsh;
 220         int boguscount = 0;
 221
 222         if (!info) {
 223                 BT_ERR("Unknown device");
 224                 return;
 225         }
 226
 227         iobase = info->link.io.BasePort1;
 228
 229         do {
 230                 info->hdev->stat.byte_rx++;
 231
 232                 /* Allocate packet */
 233                 if (info->rx_skb == NULL)
 234                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 235                                 BT_ERR("Can't allocate mem for new packet");
 236                                 info->rx_state = RECV_WAIT_NSH;
 237                                 info->rx_count = NSHL;
 238                                 return;
 239                         }
 240
 241                 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
 242                 nsh = (nsh_t *)info->rx_skb->data;
 243
 244                 info->rx_count--;
 245
 246                 if (info->rx_count == 0) {
 247
 248                         switch (info->rx_state) {
 249                         case RECV_WAIT_NSH:
 250                                 info->rx_state = RECV_WAIT_DATA;
 251                                 info->rx_count = nsh->len + (nsh->len & 0x0001);
 252                                 break;
 253                         case RECV_WAIT_DATA:
 254                                 info->rx_skb->pkt_type = nsh->type;
 255
 256                                 /* remove PAD byte if it exists */
 257                                 if (nsh->len & 0x0001) {
 258                                         info->rx_skb->tail--;
 259                                         info->rx_skb->len--;
 260                                 }
 261
 262                                 /* remove NSH */
 263                                 skb_pull(info->rx_skb, NSHL);
 264
 265                                 switch (info->rx_skb->pkt_type) {
 266                                 case 0x80:
 267                                         /* control data for the Nokia Card */
 268                                         dtl1_control(info, info->rx_skb);
 269                                         break;
 270                                 case 0x82:
 271                                 case 0x83:
 272                                 case 0x84:
 273                                         /* send frame to the HCI layer */
 274                                         info->rx_skb->dev = (void *) info->hdev;
 275                                         info->rx_skb->pkt_type &= 0x0f;
 276                                         hci_recv_frame(info->rx_skb);
 277                                         break;
 278                                 default:
 279                                         /* unknown packet */
 280                                         BT_ERR("Unknown HCI packet with type 0x%02x received", info->rx_skb->pkt_type);
 281                                         kfree_skb(info->rx_skb);
 282                                         break;
 283                                 }
 284
 285                                 info->rx_state = RECV_WAIT_NSH;
 286                                 info->rx_count = NSHL;
 287                                 info->rx_skb = NULL;
 288                                 break;
 289                         }
 290
 291                 }
 292
 293                 /* Make sure we don't stay here too long */
 294                 if (boguscount++ > 32)
 295                         break;
 296
 297         } while (inb(iobase + UART_LSR) & UART_LSR_DR);
 298 }
 299
 300
 301 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
 302 {
 303         dtl1_info_t *info = dev_inst;
 304         unsigned int iobase;
 305         unsigned char msr;
 306         int boguscount = 0;
 307         int iir, lsr;
 308
 309         if (!info || !info->hdev) {
 310                 BT_ERR("Call of irq %d for unknown device", irq);
 311                 return IRQ_NONE;
 312         }
 313
 314         iobase = info->link.io.BasePort1;
 315
 316         spin_lock(&(info->lock));
 317
 318         iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 319         while (iir) {
 320
 321                 /* Clear interrupt */
 322                 lsr = inb(iobase + UART_LSR);
 323
 324                 switch (iir) {
 325                 case UART_IIR_RLSI:
 326                         BT_ERR("RLSI");
 327                         break;
 328                 case UART_IIR_RDI:
 329                         /* Receive interrupt */
 330                         dtl1_receive(info);
 331                         break;
 332                 case UART_IIR_THRI:
 333                         if (lsr & UART_LSR_THRE) {
 334                                 /* Transmitter ready for data */
 335                                 dtl1_write_wakeup(info);
 336                         }
 337                         break;
 338                 default:
 339                         BT_ERR("Unhandled IIR=%#x", iir);
 340                         break;
 341                 }
 342
 343                 /* Make sure we don't stay here too long */
 344                 if (boguscount++ > 100)
 345                         break;
 346
 347                 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 348
 349         }
 350
 351         msr = inb(iobase + UART_MSR);
 352
 353         if (info->ri_latch ^ (msr & UART_MSR_RI)) {
 354                 info->ri_latch = msr & UART_MSR_RI;
 355                 clear_bit(XMIT_WAITING, &(info->tx_state));
 356                 dtl1_write_wakeup(info);
 357         }
 358
 359         spin_unlock(&(info->lock));
 360
 361         return IRQ_HANDLED;
 362 }
 363
 364
 365
 366 /* ======================== HCI interface ======================== */
 367
 368
 369 static int dtl1_hci_open(struct hci_dev *hdev)
 370 {
 371         set_bit(HCI_RUNNING, &(hdev->flags));
 372
 373         return 0;
 374 }
 375
 376
 377 static int dtl1_hci_flush(struct hci_dev *hdev)
 378 {
 379         dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
 380
 381         /* Drop TX queue */
 382         skb_queue_purge(&(info->txq));
 383
 384         return 0;
 385 }
 386
 387
 388 static int dtl1_hci_close(struct hci_dev *hdev)
 389 {
 390         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 391                 return 0;
 392
 393         dtl1_hci_flush(hdev);
 394
 395         return 0;
 396 }
 397
 398
 399 static int dtl1_hci_send_frame(struct sk_buff *skb)
 400 {
 401         dtl1_info_t *info;
 402         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
 403         struct sk_buff *s;
 404         nsh_t nsh;
 405
 406         if (!hdev) {
 407                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 408                 return -ENODEV;
 409         }
 410
 411         info = (dtl1_info_t *)(hdev->driver_data);
 412
 413         switch (skb->pkt_type) {
 414         case HCI_COMMAND_PKT:
 415                 hdev->stat.cmd_tx++;
 416                 nsh.type = 0x81;
 417                 break;
 418         case HCI_ACLDATA_PKT:
 419                 hdev->stat.acl_tx++;
 420                 nsh.type = 0x82;
 421                 break;
 422         case HCI_SCODATA_PKT:
 423                 hdev->stat.sco_tx++;
 424                 nsh.type = 0x83;
 425                 break;
 426         };
 427
 428         nsh.zero = 0;
 429         nsh.len = skb->len;
 430
 431         s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
 432         skb_reserve(s, NSHL);
 433         memcpy(skb_put(s, skb->len), skb->data, skb->len);
 434         if (skb->len & 0x0001)
 435                 *skb_put(s, 1) = 0;     /* PAD */
 436
 437         /* Prepend skb with Nokia frame header and queue */
 438         memcpy(skb_push(s, NSHL), &nsh, NSHL);
 439         skb_queue_tail(&(info->txq), s);
 440
 441         dtl1_write_wakeup(info);
 442
 443         kfree_skb(skb);
 444
 445         return 0;
 446 }
 447
 448
 449 static void dtl1_hci_destruct(struct hci_dev *hdev)
 450 {
 451 }
 452
 453
 454 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd,  unsigned long arg)
 455 {
 456         return -ENOIOCTLCMD;
 457 }
 458
 459
 460
 461 /* ======================== Card services HCI interaction ======================== */
 462
 463
 464 static int dtl1_open(dtl1_info_t *info)
 465 {
 466         unsigned long flags;
 467         unsigned int iobase = info->link.io.BasePort1;
 468         struct hci_dev *hdev;
 469
 470         spin_lock_init(&(info->lock));
 471
 472         skb_queue_head_init(&(info->txq));
 473
 474         info->rx_state = RECV_WAIT_NSH;
 475         info->rx_count = NSHL;
 476         info->rx_skb = NULL;
 477
 478         set_bit(XMIT_WAITING, &(info->tx_state));
 479
 480         /* Initialize HCI device */
 481         hdev = hci_alloc_dev();
 482         if (!hdev) {
 483                 BT_ERR("Can't allocate HCI device");
 484                 return -ENOMEM;
 485         }
 486
 487         info->hdev = hdev;
 488
 489         hdev->type = HCI_PCCARD;
 490         hdev->driver_data = info;
 491
 492         hdev->open     = dtl1_hci_open;
 493         hdev->close    = dtl1_hci_close;
 494         hdev->flush    = dtl1_hci_flush;
 495         hdev->send     = dtl1_hci_send_frame;
 496         hdev->destruct = dtl1_hci_destruct;
 497         hdev->ioctl    = dtl1_hci_ioctl;
 498
 499         hdev->owner = THIS_MODULE;
 500
 501         spin_lock_irqsave(&(info->lock), flags);
 502
 503         /* Reset UART */
 504         outb(0, iobase + UART_MCR);
 505
 506         /* Turn off interrupts */
 507         outb(0, iobase + UART_IER);
 508
 509         /* Initialize UART */
 510         outb(UART_LCR_WLEN8, iobase + UART_LCR);        /* Reset DLAB */
 511         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
 512
 513         info->ri_latch = inb(info->link.io.BasePort1 + UART_MSR) & UART_MSR_RI;
 514
 515         /* Turn on interrupts */
 516         outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
 517
 518         spin_unlock_irqrestore(&(info->lock), flags);
 519
 520         /* Timeout before it is safe to send the first HCI packet */
 521         msleep(2000);
 522
 523         /* Register HCI device */
 524         if (hci_register_dev(hdev) < 0) {
 525                 BT_ERR("Can't register HCI device");
 526                 info->hdev = NULL;
 527                 hci_free_dev(hdev);
 528                 return -ENODEV;
 529         }
 530
 531         return 0;
 532 }
 533
 534
 535 static int dtl1_close(dtl1_info_t *info)
 536 {
 537         unsigned long flags;
 538         unsigned int iobase = info->link.io.BasePort1;
 539         struct hci_dev *hdev = info->hdev;
 540
 541         if (!hdev)
 542                 return -ENODEV;
 543
 544         dtl1_hci_close(hdev);
 545
 546         spin_lock_irqsave(&(info->lock), flags);
 547
 548         /* Reset UART */
 549         outb(0, iobase + UART_MCR);
 550
 551         /* Turn off interrupts */
 552         outb(0, iobase + UART_IER);
 553
 554         spin_unlock_irqrestore(&(info->lock), flags);
 555
 556         if (hci_unregister_dev(hdev) < 0)
 557                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 558
 559         hci_free_dev(hdev);
 560
 561         return 0;
 562 }
 563
 564 static dev_link_t *dtl1_attach(void)
 565 {
 566         dtl1_info_t *info;
 567         client_reg_t client_reg;
 568         dev_link_t *link;
 569         int ret;
 570
 571         /* Create new info device */
 572         info = kmalloc(sizeof(*info), GFP_KERNEL);
 573         if (!info)
 574                 return NULL;
 575         memset(info, 0, sizeof(*info));
 576
 577         link = &info->link;
 578         link->priv = info;
 579
 580         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 581         link->io.NumPorts1 = 8;
 582         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 583         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 584
 585         link->irq.Handler = dtl1_interrupt;
 586         link->irq.Instance = info;
 587
 588         link->conf.Attributes = CONF_ENABLE_IRQ;
 589         link->conf.Vcc = 50;
 590         link->conf.IntType = INT_MEMORY_AND_IO;
 591
 592         /* Register with Card Services */
 593         link->next = dev_list;
 594         dev_list = link;
 595         client_reg.dev_info = &dev_info;
 596         client_reg.Version = 0x0210;
 597         client_reg.event_callback_args.client_data = link;
 598
 599         ret = pcmcia_register_client(&link->handle, &client_reg);
 600         if (ret != CS_SUCCESS) {
 601                 cs_error(link->handle, RegisterClient, ret);
 602                 dtl1_detach(link);
 603                 return NULL;
 604         }
 605
 606         return link;
 607 }
 608
 609
 610 static void dtl1_detach(dev_link_t *link)
 611 {
 612         dtl1_info_t *info = link->priv;
 613         dev_link_t **linkp;
 614         int ret;
 615
 616         /* Locate device structure */
 617         for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
 618                 if (*linkp == link)
 619                         break;
 620
 621         if (*linkp == NULL)
 622                 return;
 623
 624         if (link->state & DEV_CONFIG)
 625                 dtl1_release(link);
 626
 627         if (link->handle) {
 628                 ret = pcmcia_deregister_client(link->handle);
 629                 if (ret != CS_SUCCESS)
 630                         cs_error(link->handle, DeregisterClient, ret);
 631         }
 632
 633         /* Unlink device structure, free bits */
 634         *linkp = link->next;
 635
 636         kfree(info);
 637 }
 638
 639 static int get_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 640 {
 641         int i;
 642
 643         i = pcmcia_get_tuple_data(handle, tuple);
 644         if (i != CS_SUCCESS)
 645                 return i;
 646
 647         return pcmcia_parse_tuple(handle, tuple, parse);
 648 }
 649
 650 static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 651 {
 652         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
 653                 return CS_NO_MORE_ITEMS;
 654         return get_tuple(handle, tuple, parse);
 655 }
 656
 657 static int next_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 658 {
 659         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
 660                 return CS_NO_MORE_ITEMS;
 661         return get_tuple(handle, tuple, parse);
 662 }
 663
 664 static void dtl1_config(dev_link_t *link)
 665 {
 666         client_handle_t handle = link->handle;
 667         dtl1_info_t *info = link->priv;
 668         tuple_t tuple;
 669         u_short buf[256];
 670         cisparse_t parse;
 671         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 672         config_info_t config;
 673         int i, last_ret, last_fn;
 674
 675         tuple.TupleData = (cisdata_t *)buf;
 676         tuple.TupleOffset = 0;
 677         tuple.TupleDataMax = 255;
 678         tuple.Attributes = 0;
 679
 680         /* Get configuration register information */
 681         tuple.DesiredTuple = CISTPL_CONFIG;
 682         last_ret = first_tuple(handle, &tuple, &parse);
 683         if (last_ret != CS_SUCCESS) {
 684                 last_fn = ParseTuple;
 685                 goto cs_failed;
 686         }
 687         link->conf.ConfigBase = parse.config.base;
 688         link->conf.Present = parse.config.rmask[0];
 689
 690         /* Configure card */
 691         link->state |= DEV_CONFIG;
 692         i = pcmcia_get_configuration_info(handle, &config);
 693         link->conf.Vcc = config.Vcc;
 694
 695         tuple.TupleData = (cisdata_t *)buf;
 696         tuple.TupleOffset = 0;
 697         tuple.TupleDataMax = 255;
 698         tuple.Attributes = 0;
 699         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 700
 701         /* Look for a generic full-sized window */
 702         link->io.NumPorts1 = 8;
 703         i = first_tuple(handle, &tuple, &parse);
 704         while (i != CS_NO_MORE_ITEMS) {
 705                 if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
 706                         link->conf.ConfigIndex = cf->index;
 707                         link->io.BasePort1 = cf->io.win[0].base;
 708                         link->io.NumPorts1 = cf->io.win[0].len; /*yo */
 709                         link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
 710                         i = pcmcia_request_io(link->handle, &link->io);
 711                         if (i == CS_SUCCESS)
 712                                 break;
 713                 }
 714                 i = next_tuple(handle, &tuple, &parse);
 715         }
 716
 717         if (i != CS_SUCCESS) {
 718                 cs_error(link->handle, RequestIO, i);
 719                 goto failed;
 720         }
 721
 722         i = pcmcia_request_irq(link->handle, &link->irq);
 723         if (i != CS_SUCCESS) {
 724                 cs_error(link->handle, RequestIRQ, i);
 725                 link->irq.AssignedIRQ = 0;
 726         }
 727
 728         i = pcmcia_request_configuration(link->handle, &link->conf);
 729         if (i != CS_SUCCESS) {
 730                 cs_error(link->handle, RequestConfiguration, i);
 731                 goto failed;
 732         }
 733
 734         if (dtl1_open(info) != 0)
 735                 goto failed;
 736
 737         strcpy(info->node.dev_name, info->hdev->name);
 738         link->dev = &info->node;
 739         link->state &= ~DEV_CONFIG_PENDING;
 740
 741         return;
 742
 743 cs_failed:
 744         cs_error(link->handle, last_fn, last_ret);
 745
 746 failed:
 747         dtl1_release(link);
 748 }
 749
 750
 751 static void dtl1_release(dev_link_t *link)
 752 {
 753         dtl1_info_t *info = link->priv;
 754
 755         if (link->state & DEV_PRESENT)
 756                 dtl1_close(info);
 757
 758         link->dev = NULL;
 759
 760         pcmcia_release_configuration(link->handle);
 761         pcmcia_release_io(link->handle, &link->io);
 762         pcmcia_release_irq(link->handle, &link->irq);
 763
 764         link->state &= ~DEV_CONFIG;
 765 }
 766
 767
 768 static int dtl1_event(event_t event, int priority, event_callback_args_t *args)
 769 {
 770         dev_link_t *link = args->client_data;
 771         dtl1_info_t *info = link->priv;
 772
 773         switch (event) {
 774         case CS_EVENT_CARD_REMOVAL:
 775                 link->state &= ~DEV_PRESENT;
 776                 if (link->state & DEV_CONFIG) {
 777                         dtl1_close(info);
 778                         dtl1_release(link);
 779                 }
 780                 break;
 781         case CS_EVENT_CARD_INSERTION:
 782                 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 783                 dtl1_config(link);
 784                 break;
 785         case CS_EVENT_PM_SUSPEND:
 786                 link->state |= DEV_SUSPEND;
 787                 /* Fall through... */
 788         case CS_EVENT_RESET_PHYSICAL:
 789                 if (link->state & DEV_CONFIG)
 790                         pcmcia_release_configuration(link->handle);
 791                 break;
 792         case CS_EVENT_PM_RESUME:
 793                 link->state &= ~DEV_SUSPEND;
 794                 /* Fall through... */
 795         case CS_EVENT_CARD_RESET:
 796                 if (DEV_OK(link))
 797                         pcmcia_request_configuration(link->handle, &link->conf);
 798                 break;
 799         }
 800
 801         return 0;
 802 }
 803
 804 static struct pcmcia_device_id dtl1_ids[] = {
 805         PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
 806         PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
 807         PCMCIA_DEVICE_NULL
 808 };
 809 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
 810
 811 static struct pcmcia_driver dtl1_driver = {
 812         .owner          = THIS_MODULE,
 813         .drv            = {
 814                 .name   = "dtl1_cs",
 815         },
 816         .attach         = dtl1_attach,
 817         .event          = dtl1_event,
 818         .detach         = dtl1_detach,
 819         .id_table       = dtl1_ids,
 820 };
 821
 822 static int __init init_dtl1_cs(void)
 823 {
 824         return pcmcia_register_driver(&dtl1_driver);
 825 }
 826
 827
 828 static void __exit exit_dtl1_cs(void)
 829 {
 830         pcmcia_unregister_driver(&dtl1_driver);
 831         BUG_ON(dev_list != NULL);
 832 }
 833
 834 module_init(init_dtl1_cs);
 835 module_exit(exit_dtl1_cs);