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
  93 static void dtl1_detach(struct pcmcia_device *p_dev);
  94
  95
  96 /* Transmit states  */
  97 #define XMIT_SENDING  1
  98 #define XMIT_WAKEUP   2
  99 #define XMIT_WAITING  8
 100
 101 /* Receiver States */
 102 #define RECV_WAIT_NSH   0
 103 #define RECV_WAIT_DATA  1
 104
 105
 106 typedef struct {
 107         u8 type;
 108         u8 zero;
 109         u16 len;
 110 } __attribute__ ((packed)) nsh_t;       /* Nokia Specific Header */
 111
 112 #define NSHL  4                         /* Nokia Specific Header Length */
 113
 114
 115
 116 /* ======================== Interrupt handling ======================== */
 117
 118
 119 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
 120 {
 121         int actual = 0;
 122
 123         /* Tx FIFO should be empty */
 124         if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
 125                 return 0;
 126
 127         /* Fill FIFO with current frame */
 128         while ((fifo_size-- > 0) && (actual < len)) {
 129                 /* Transmit next byte */
 130                 outb(buf[actual], iobase + UART_TX);
 131                 actual++;
 132         }
 133
 134         return actual;
 135 }
 136
 137
 138 static void dtl1_write_wakeup(dtl1_info_t *info)
 139 {
 140         if (!info) {
 141                 BT_ERR("Unknown device");
 142                 return;
 143         }
 144
 145         if (test_bit(XMIT_WAITING, &(info->tx_state))) {
 146                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 147                 return;
 148         }
 149
 150         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
 151                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 152                 return;
 153         }
 154
 155         do {
 156                 register unsigned int iobase = info->link.io.BasePort1;
 157                 register struct sk_buff *skb;
 158                 register int len;
 159
 160                 clear_bit(XMIT_WAKEUP, &(info->tx_state));
 161
 162                 if (!(info->link.state & DEV_PRESENT))
 163                         return;
 164
 165                 if (!(skb = skb_dequeue(&(info->txq))))
 166                         break;
 167
 168                 /* Send frame */
 169                 len = dtl1_write(iobase, 32, skb->data, skb->len);
 170
 171                 if (len == skb->len) {
 172                         set_bit(XMIT_WAITING, &(info->tx_state));
 173                         kfree_skb(skb);
 174                 } else {
 175                         skb_pull(skb, len);
 176                         skb_queue_head(&(info->txq), skb);
 177                 }
 178
 179                 info->hdev->stat.byte_tx += len;
 180
 181         } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
 182
 183         clear_bit(XMIT_SENDING, &(info->tx_state));
 184 }
 185
 186
 187 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
 188 {
 189         u8 flowmask = *(u8 *)skb->data;
 190         int i;
 191
 192         printk(KERN_INFO "Bluetooth: Nokia control data =");
 193         for (i = 0; i < skb->len; i++) {
 194                 printk(" %02x", skb->data[i]);
 195         }
 196         printk("\n");
 197
 198         /* transition to active state */
 199         if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
 200                 clear_bit(XMIT_WAITING, &(info->tx_state));
 201                 dtl1_write_wakeup(info);
 202         }
 203
 204         info->flowmask = flowmask;
 205
 206         kfree_skb(skb);
 207 }
 208
 209
 210 static void dtl1_receive(dtl1_info_t *info)
 211 {
 212         unsigned int iobase;
 213         nsh_t *nsh;
 214         int boguscount = 0;
 215
 216         if (!info) {
 217                 BT_ERR("Unknown device");
 218                 return;
 219         }
 220
 221         iobase = info->link.io.BasePort1;
 222
 223         do {
 224                 info->hdev->stat.byte_rx++;
 225
 226                 /* Allocate packet */
 227                 if (info->rx_skb == NULL)
 228                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 229                                 BT_ERR("Can't allocate mem for new packet");
 230                                 info->rx_state = RECV_WAIT_NSH;
 231                                 info->rx_count = NSHL;
 232                                 return;
 233                         }
 234
 235                 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
 236                 nsh = (nsh_t *)info->rx_skb->data;
 237
 238                 info->rx_count--;
 239
 240                 if (info->rx_count == 0) {
 241
 242                         switch (info->rx_state) {
 243                         case RECV_WAIT_NSH:
 244                                 info->rx_state = RECV_WAIT_DATA;
 245                                 info->rx_count = nsh->len + (nsh->len & 0x0001);
 246                                 break;
 247                         case RECV_WAIT_DATA:
 248                                 bt_cb(info->rx_skb)->pkt_type = nsh->type;
 249
 250                                 /* remove PAD byte if it exists */
 251                                 if (nsh->len & 0x0001) {
 252                                         info->rx_skb->tail--;
 253                                         info->rx_skb->len--;
 254                                 }
 255
 256                                 /* remove NSH */
 257                                 skb_pull(info->rx_skb, NSHL);
 258
 259                                 switch (bt_cb(info->rx_skb)->pkt_type) {
 260                                 case 0x80:
 261                                         /* control data for the Nokia Card */
 262                                         dtl1_control(info, info->rx_skb);
 263                                         break;
 264                                 case 0x82:
 265                                 case 0x83:
 266                                 case 0x84:
 267                                         /* send frame to the HCI layer */
 268                                         info->rx_skb->dev = (void *) info->hdev;
 269                                         bt_cb(info->rx_skb)->pkt_type &= 0x0f;
 270                                         hci_recv_frame(info->rx_skb);
 271                                         break;
 272                                 default:
 273                                         /* unknown packet */
 274                                         BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
 275                                         kfree_skb(info->rx_skb);
 276                                         break;
 277                                 }
 278
 279                                 info->rx_state = RECV_WAIT_NSH;
 280                                 info->rx_count = NSHL;
 281                                 info->rx_skb = NULL;
 282                                 break;
 283                         }
 284
 285                 }
 286
 287                 /* Make sure we don't stay here too long */
 288                 if (boguscount++ > 32)
 289                         break;
 290
 291         } while (inb(iobase + UART_LSR) & UART_LSR_DR);
 292 }
 293
 294
 295 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
 296 {
 297         dtl1_info_t *info = dev_inst;
 298         unsigned int iobase;
 299         unsigned char msr;
 300         int boguscount = 0;
 301         int iir, lsr;
 302
 303         if (!info || !info->hdev) {
 304                 BT_ERR("Call of irq %d for unknown device", irq);
 305                 return IRQ_NONE;
 306         }
 307
 308         iobase = info->link.io.BasePort1;
 309
 310         spin_lock(&(info->lock));
 311
 312         iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 313         while (iir) {
 314
 315                 /* Clear interrupt */
 316                 lsr = inb(iobase + UART_LSR);
 317
 318                 switch (iir) {
 319                 case UART_IIR_RLSI:
 320                         BT_ERR("RLSI");
 321                         break;
 322                 case UART_IIR_RDI:
 323                         /* Receive interrupt */
 324                         dtl1_receive(info);
 325                         break;
 326                 case UART_IIR_THRI:
 327                         if (lsr & UART_LSR_THRE) {
 328                                 /* Transmitter ready for data */
 329                                 dtl1_write_wakeup(info);
 330                         }
 331                         break;
 332                 default:
 333                         BT_ERR("Unhandled IIR=%#x", iir);
 334                         break;
 335                 }
 336
 337                 /* Make sure we don't stay here too long */
 338                 if (boguscount++ > 100)
 339                         break;
 340
 341                 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 342
 343         }
 344
 345         msr = inb(iobase + UART_MSR);
 346
 347         if (info->ri_latch ^ (msr & UART_MSR_RI)) {
 348                 info->ri_latch = msr & UART_MSR_RI;
 349                 clear_bit(XMIT_WAITING, &(info->tx_state));
 350                 dtl1_write_wakeup(info);
 351         }
 352
 353         spin_unlock(&(info->lock));
 354
 355         return IRQ_HANDLED;
 356 }
 357
 358
 359
 360 /* ======================== HCI interface ======================== */
 361
 362
 363 static int dtl1_hci_open(struct hci_dev *hdev)
 364 {
 365         set_bit(HCI_RUNNING, &(hdev->flags));
 366
 367         return 0;
 368 }
 369
 370
 371 static int dtl1_hci_flush(struct hci_dev *hdev)
 372 {
 373         dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
 374
 375         /* Drop TX queue */
 376         skb_queue_purge(&(info->txq));
 377
 378         return 0;
 379 }
 380
 381
 382 static int dtl1_hci_close(struct hci_dev *hdev)
 383 {
 384         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 385                 return 0;
 386
 387         dtl1_hci_flush(hdev);
 388
 389         return 0;
 390 }
 391
 392
 393 static int dtl1_hci_send_frame(struct sk_buff *skb)
 394 {
 395         dtl1_info_t *info;
 396         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
 397         struct sk_buff *s;
 398         nsh_t nsh;
 399
 400         if (!hdev) {
 401                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 402                 return -ENODEV;
 403         }
 404
 405         info = (dtl1_info_t *)(hdev->driver_data);
 406
 407         switch (bt_cb(skb)->pkt_type) {
 408         case HCI_COMMAND_PKT:
 409                 hdev->stat.cmd_tx++;
 410                 nsh.type = 0x81;
 411                 break;
 412         case HCI_ACLDATA_PKT:
 413                 hdev->stat.acl_tx++;
 414                 nsh.type = 0x82;
 415                 break;
 416         case HCI_SCODATA_PKT:
 417                 hdev->stat.sco_tx++;
 418                 nsh.type = 0x83;
 419                 break;
 420         };
 421
 422         nsh.zero = 0;
 423         nsh.len = skb->len;
 424
 425         s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
 426         skb_reserve(s, NSHL);
 427         memcpy(skb_put(s, skb->len), skb->data, skb->len);
 428         if (skb->len & 0x0001)
 429                 *skb_put(s, 1) = 0;     /* PAD */
 430
 431         /* Prepend skb with Nokia frame header and queue */
 432         memcpy(skb_push(s, NSHL), &nsh, NSHL);
 433         skb_queue_tail(&(info->txq), s);
 434
 435         dtl1_write_wakeup(info);
 436
 437         kfree_skb(skb);
 438
 439         return 0;
 440 }
 441
 442
 443 static void dtl1_hci_destruct(struct hci_dev *hdev)
 444 {
 445 }
 446
 447
 448 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd,  unsigned long arg)
 449 {
 450         return -ENOIOCTLCMD;
 451 }
 452
 453
 454
 455 /* ======================== Card services HCI interaction ======================== */
 456
 457
 458 static int dtl1_open(dtl1_info_t *info)
 459 {
 460         unsigned long flags;
 461         unsigned int iobase = info->link.io.BasePort1;
 462         struct hci_dev *hdev;
 463
 464         spin_lock_init(&(info->lock));
 465
 466         skb_queue_head_init(&(info->txq));
 467
 468         info->rx_state = RECV_WAIT_NSH;
 469         info->rx_count = NSHL;
 470         info->rx_skb = NULL;
 471
 472         set_bit(XMIT_WAITING, &(info->tx_state));
 473
 474         /* Initialize HCI device */
 475         hdev = hci_alloc_dev();
 476         if (!hdev) {
 477                 BT_ERR("Can't allocate HCI device");
 478                 return -ENOMEM;
 479         }
 480
 481         info->hdev = hdev;
 482
 483         hdev->type = HCI_PCCARD;
 484         hdev->driver_data = info;
 485
 486         hdev->open     = dtl1_hci_open;
 487         hdev->close    = dtl1_hci_close;
 488         hdev->flush    = dtl1_hci_flush;
 489         hdev->send     = dtl1_hci_send_frame;
 490         hdev->destruct = dtl1_hci_destruct;
 491         hdev->ioctl    = dtl1_hci_ioctl;
 492
 493         hdev->owner = THIS_MODULE;
 494
 495         spin_lock_irqsave(&(info->lock), flags);
 496
 497         /* Reset UART */
 498         outb(0, iobase + UART_MCR);
 499
 500         /* Turn off interrupts */
 501         outb(0, iobase + UART_IER);
 502
 503         /* Initialize UART */
 504         outb(UART_LCR_WLEN8, iobase + UART_LCR);        /* Reset DLAB */
 505         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
 506
 507         info->ri_latch = inb(info->link.io.BasePort1 + UART_MSR) & UART_MSR_RI;
 508
 509         /* Turn on interrupts */
 510         outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
 511
 512         spin_unlock_irqrestore(&(info->lock), flags);
 513
 514         /* Timeout before it is safe to send the first HCI packet */
 515         msleep(2000);
 516
 517         /* Register HCI device */
 518         if (hci_register_dev(hdev) < 0) {
 519                 BT_ERR("Can't register HCI device");
 520                 info->hdev = NULL;
 521                 hci_free_dev(hdev);
 522                 return -ENODEV;
 523         }
 524
 525         return 0;
 526 }
 527
 528
 529 static int dtl1_close(dtl1_info_t *info)
 530 {
 531         unsigned long flags;
 532         unsigned int iobase = info->link.io.BasePort1;
 533         struct hci_dev *hdev = info->hdev;
 534
 535         if (!hdev)
 536                 return -ENODEV;
 537
 538         dtl1_hci_close(hdev);
 539
 540         spin_lock_irqsave(&(info->lock), flags);
 541
 542         /* Reset UART */
 543         outb(0, iobase + UART_MCR);
 544
 545         /* Turn off interrupts */
 546         outb(0, iobase + UART_IER);
 547
 548         spin_unlock_irqrestore(&(info->lock), flags);
 549
 550         if (hci_unregister_dev(hdev) < 0)
 551                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 552
 553         hci_free_dev(hdev);
 554
 555         return 0;
 556 }
 557
 558 static int dtl1_attach(struct pcmcia_device *p_dev)
 559 {
 560         dtl1_info_t *info;
 561         dev_link_t *link;
 562
 563         /* Create new info device */
 564         info = kzalloc(sizeof(*info), GFP_KERNEL);
 565         if (!info)
 566                 return -ENOMEM;
 567
 568         link = &info->link;
 569         link->priv = info;
 570
 571         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 572         link->io.NumPorts1 = 8;
 573         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 574         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 575
 576         link->irq.Handler = dtl1_interrupt;
 577         link->irq.Instance = info;
 578
 579         link->conf.Attributes = CONF_ENABLE_IRQ;
 580         link->conf.Vcc = 50;
 581         link->conf.IntType = INT_MEMORY_AND_IO;
 582
 583         link->handle = p_dev;
 584         p_dev->instance = link;
 585
 586         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 587         dtl1_config(link);
 588
 589         return 0;
 590 }
 591
 592
 593 static void dtl1_detach(struct pcmcia_device *p_dev)
 594 {
 595         dev_link_t *link = dev_to_instance(p_dev);
 596         dtl1_info_t *info = link->priv;
 597
 598         if (link->state & DEV_CONFIG)
 599                 dtl1_release(link);
 600
 601         kfree(info);
 602 }
 603
 604 static int get_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 605 {
 606         int i;
 607
 608         i = pcmcia_get_tuple_data(handle, tuple);
 609         if (i != CS_SUCCESS)
 610                 return i;
 611
 612         return pcmcia_parse_tuple(handle, tuple, parse);
 613 }
 614
 615 static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 616 {
 617         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
 618                 return CS_NO_MORE_ITEMS;
 619         return get_tuple(handle, tuple, parse);
 620 }
 621
 622 static int next_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 623 {
 624         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
 625                 return CS_NO_MORE_ITEMS;
 626         return get_tuple(handle, tuple, parse);
 627 }
 628
 629 static void dtl1_config(dev_link_t *link)
 630 {
 631         client_handle_t handle = link->handle;
 632         dtl1_info_t *info = link->priv;
 633         tuple_t tuple;
 634         u_short buf[256];
 635         cisparse_t parse;
 636         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 637         config_info_t config;
 638         int i, last_ret, last_fn;
 639
 640         tuple.TupleData = (cisdata_t *)buf;
 641         tuple.TupleOffset = 0;
 642         tuple.TupleDataMax = 255;
 643         tuple.Attributes = 0;
 644
 645         /* Get configuration register information */
 646         tuple.DesiredTuple = CISTPL_CONFIG;
 647         last_ret = first_tuple(handle, &tuple, &parse);
 648         if (last_ret != CS_SUCCESS) {
 649                 last_fn = ParseTuple;
 650                 goto cs_failed;
 651         }
 652         link->conf.ConfigBase = parse.config.base;
 653         link->conf.Present = parse.config.rmask[0];
 654
 655         /* Configure card */
 656         link->state |= DEV_CONFIG;
 657         i = pcmcia_get_configuration_info(handle, &config);
 658         link->conf.Vcc = config.Vcc;
 659
 660         tuple.TupleData = (cisdata_t *)buf;
 661         tuple.TupleOffset = 0;
 662         tuple.TupleDataMax = 255;
 663         tuple.Attributes = 0;
 664         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 665
 666         /* Look for a generic full-sized window */
 667         link->io.NumPorts1 = 8;
 668         i = first_tuple(handle, &tuple, &parse);
 669         while (i != CS_NO_MORE_ITEMS) {
 670                 if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
 671                         link->conf.ConfigIndex = cf->index;
 672                         link->io.BasePort1 = cf->io.win[0].base;
 673                         link->io.NumPorts1 = cf->io.win[0].len; /*yo */
 674                         link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
 675                         i = pcmcia_request_io(link->handle, &link->io);
 676                         if (i == CS_SUCCESS)
 677                                 break;
 678                 }
 679                 i = next_tuple(handle, &tuple, &parse);
 680         }
 681
 682         if (i != CS_SUCCESS) {
 683                 cs_error(link->handle, RequestIO, i);
 684                 goto failed;
 685         }
 686
 687         i = pcmcia_request_irq(link->handle, &link->irq);
 688         if (i != CS_SUCCESS) {
 689                 cs_error(link->handle, RequestIRQ, i);
 690                 link->irq.AssignedIRQ = 0;
 691         }
 692
 693         i = pcmcia_request_configuration(link->handle, &link->conf);
 694         if (i != CS_SUCCESS) {
 695                 cs_error(link->handle, RequestConfiguration, i);
 696                 goto failed;
 697         }
 698
 699         if (dtl1_open(info) != 0)
 700                 goto failed;
 701
 702         strcpy(info->node.dev_name, info->hdev->name);
 703         link->dev = &info->node;
 704         link->state &= ~DEV_CONFIG_PENDING;
 705
 706         return;
 707
 708 cs_failed:
 709         cs_error(link->handle, last_fn, last_ret);
 710
 711 failed:
 712         dtl1_release(link);
 713 }
 714
 715
 716 static void dtl1_release(dev_link_t *link)
 717 {
 718         dtl1_info_t *info = link->priv;
 719
 720         if (link->state & DEV_PRESENT)
 721                 dtl1_close(info);
 722
 723         link->dev = NULL;
 724
 725         pcmcia_release_configuration(link->handle);
 726         pcmcia_release_io(link->handle, &link->io);
 727         pcmcia_release_irq(link->handle, &link->irq);
 728
 729         link->state &= ~DEV_CONFIG;
 730 }
 731
 732 static int dtl1_suspend(struct pcmcia_device *dev)
 733 {
 734         dev_link_t *link = dev_to_instance(dev);
 735
 736         link->state |= DEV_SUSPEND;
 737         if (link->state & DEV_CONFIG)
 738                 pcmcia_release_configuration(link->handle);
 739
 740         return 0;
 741 }
 742
 743 static int dtl1_resume(struct pcmcia_device *dev)
 744 {
 745         dev_link_t *link = dev_to_instance(dev);
 746
 747         link->state &= ~DEV_SUSPEND;
 748         if (DEV_OK(link))
 749                 pcmcia_request_configuration(link->handle, &link->conf);
 750
 751         return 0;
 752 }
 753
 754
 755 static struct pcmcia_device_id dtl1_ids[] = {
 756         PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
 757         PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
 758         PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
 759         PCMCIA_DEVICE_NULL
 760 };
 761 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
 762
 763 static struct pcmcia_driver dtl1_driver = {
 764         .owner          = THIS_MODULE,
 765         .drv            = {
 766                 .name   = "dtl1_cs",
 767         },
 768         .probe          = dtl1_attach,
 769         .remove         = dtl1_detach,
 770         .id_table       = dtl1_ids,
 771         .suspend        = dtl1_suspend,
 772         .resume         = dtl1_resume,
 773 };
 774
 775 static int __init init_dtl1_cs(void)
 776 {
 777         return pcmcia_register_driver(&dtl1_driver);
 778 }
 779
 780
 781 static void __exit exit_dtl1_cs(void)
 782 {
 783         pcmcia_unregister_driver(&dtl1_driver);
 784 }
 785
 786 module_init(init_dtl1_cs);
 787 module_exit(exit_dtl1_cs);