drivers/bluetooth/bt3c_cs.c

   1 /*
   2  *
   3  *  Driver for the 3Com Bluetooth PCMCIA card
   4  *
   5  *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
   6  *                           Jose Orlando Pereira <jop@di.uminho.pt>
   7  *
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License version 2 as
  11  *  published by the Free Software Foundation;
  12  *
  13  *  Software distributed under the License is distributed on an "AS
  14  *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  15  *  implied. See the License for the specific language governing
  16  *  rights and limitations under the License.
  17  *
  18  *  The initial developer of the original code is David A. Hinds
  19  *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  20  *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  21  *
  22  */
  23
  24 #include <linux/config.h>
  25 #include <linux/module.h>
  26
  27 #include <linux/kernel.h>
  28 #include <linux/init.h>
  29 #include <linux/slab.h>
  30 #include <linux/types.h>
  31 #include <linux/sched.h>
  32 #include <linux/delay.h>
  33 #include <linux/errno.h>
  34 #include <linux/ptrace.h>
  35 #include <linux/ioport.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/moduleparam.h>
  38
  39 #include <linux/skbuff.h>
  40 #include <linux/string.h>
  41 #include <linux/serial.h>
  42 #include <linux/serial_reg.h>
  43 #include <linux/bitops.h>
  44 #include <asm/system.h>
  45 #include <asm/io.h>
  46
  47 #include <linux/device.h>
  48 #include <linux/firmware.h>
  49
  50 #include <pcmcia/version.h>
  51 #include <pcmcia/cs_types.h>
  52 #include <pcmcia/cs.h>
  53 #include <pcmcia/cistpl.h>
  54 #include <pcmcia/ciscode.h>
  55 #include <pcmcia/ds.h>
  56 #include <pcmcia/cisreg.h>
  57
  58 #include <net/bluetooth/bluetooth.h>
  59 #include <net/bluetooth/hci_core.h>
  60
  61
  62
  63 /* ======================== Module parameters ======================== */
  64
  65
  66 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>, Jose Orlando Pereira <jop@di.uminho.pt>");
  67 MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
  68 MODULE_LICENSE("GPL");
  69
  70
  71
  72 /* ======================== Local structures ======================== */
  73
  74
  75 typedef struct bt3c_info_t {
  76         dev_link_t link;
  77         dev_node_t node;
  78
  79         struct hci_dev *hdev;
  80
  81         spinlock_t lock;                /* For serializing operations */
  82
  83         struct sk_buff_head txq;
  84         unsigned long tx_state;
  85
  86         unsigned long rx_state;
  87         unsigned long rx_count;
  88         struct sk_buff *rx_skb;
  89 } bt3c_info_t;
  90
  91
  92 static void bt3c_config(dev_link_t *link);
  93 static void bt3c_release(dev_link_t *link);
  94 static int bt3c_event(event_t event, int priority, event_callback_args_t *args);
  95
  96 static dev_info_t dev_info = "bt3c_cs";
  97
  98 static dev_link_t *bt3c_attach(void);
  99 static void bt3c_detach(dev_link_t *);
 100
 101 static dev_link_t *dev_list = NULL;
 102
 103
 104 /* Transmit states  */
 105 #define XMIT_SENDING  1
 106 #define XMIT_WAKEUP   2
 107 #define XMIT_WAITING  8
 108
 109 /* Receiver states */
 110 #define RECV_WAIT_PACKET_TYPE   0
 111 #define RECV_WAIT_EVENT_HEADER  1
 112 #define RECV_WAIT_ACL_HEADER    2
 113 #define RECV_WAIT_SCO_HEADER    3
 114 #define RECV_WAIT_DATA          4
 115
 116
 117
 118 /* ======================== Special I/O functions ======================== */
 119
 120
 121 #define DATA_L   0
 122 #define DATA_H   1
 123 #define ADDR_L   2
 124 #define ADDR_H   3
 125 #define CONTROL  4
 126
 127
 128 static inline void bt3c_address(unsigned int iobase, unsigned short addr)
 129 {
 130         outb(addr & 0xff, iobase + ADDR_L);
 131         outb((addr >> 8) & 0xff, iobase + ADDR_H);
 132 }
 133
 134
 135 static inline void bt3c_put(unsigned int iobase, unsigned short value)
 136 {
 137         outb(value & 0xff, iobase + DATA_L);
 138         outb((value >> 8) & 0xff, iobase + DATA_H);
 139 }
 140
 141
 142 static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
 143 {
 144         bt3c_address(iobase, addr);
 145         bt3c_put(iobase, value);
 146 }
 147
 148
 149 static inline unsigned short bt3c_get(unsigned int iobase)
 150 {
 151         unsigned short value = inb(iobase + DATA_L);
 152
 153         value |= inb(iobase + DATA_H) << 8;
 154
 155         return value;
 156 }
 157
 158
 159 static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
 160 {
 161         bt3c_address(iobase, addr);
 162
 163         return bt3c_get(iobase);
 164 }
 165
 166
 167
 168 /* ======================== Interrupt handling ======================== */
 169
 170
 171 static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
 172 {
 173         int actual = 0;
 174
 175         bt3c_address(iobase, 0x7080);
 176
 177         /* Fill FIFO with current frame */
 178         while (actual < len) {
 179                 /* Transmit next byte */
 180                 bt3c_put(iobase, buf[actual]);
 181                 actual++;
 182         }
 183
 184         bt3c_io_write(iobase, 0x7005, actual);
 185
 186         return actual;
 187 }
 188
 189
 190 static void bt3c_write_wakeup(bt3c_info_t *info)
 191 {
 192         if (!info) {
 193                 BT_ERR("Unknown device");
 194                 return;
 195         }
 196
 197         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
 198                 return;
 199
 200         do {
 201                 register unsigned int iobase = info->link.io.BasePort1;
 202                 register struct sk_buff *skb;
 203                 register int len;
 204
 205                 if (!(info->link.state & DEV_PRESENT))
 206                         break;
 207
 208
 209                 if (!(skb = skb_dequeue(&(info->txq)))) {
 210                         clear_bit(XMIT_SENDING, &(info->tx_state));
 211                         break;
 212                 }
 213
 214                 /* Send frame */
 215                 len = bt3c_write(iobase, 256, skb->data, skb->len);
 216
 217                 if (len != skb->len) {
 218                         BT_ERR("Very strange");
 219                 }
 220
 221                 kfree_skb(skb);
 222
 223                 info->hdev->stat.byte_tx += len;
 224
 225         } while (0);
 226 }
 227
 228
 229 static void bt3c_receive(bt3c_info_t *info)
 230 {
 231         unsigned int iobase;
 232         int size = 0, avail;
 233
 234         if (!info) {
 235                 BT_ERR("Unknown device");
 236                 return;
 237         }
 238
 239         iobase = info->link.io.BasePort1;
 240
 241         avail = bt3c_read(iobase, 0x7006);
 242         //printk("bt3c_cs: receiving %d bytes\n", avail);
 243
 244         bt3c_address(iobase, 0x7480);
 245         while (size < avail) {
 246                 size++;
 247                 info->hdev->stat.byte_rx++;
 248
 249                 /* Allocate packet */
 250                 if (info->rx_skb == NULL) {
 251                         info->rx_state = RECV_WAIT_PACKET_TYPE;
 252                         info->rx_count = 0;
 253                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 254                                 BT_ERR("Can't allocate mem for new packet");
 255                                 return;
 256                         }
 257                 }
 258
 259
 260                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
 261
 262                         info->rx_skb->dev = (void *) info->hdev;
 263                         info->rx_skb->pkt_type = inb(iobase + DATA_L);
 264                         inb(iobase + DATA_H);
 265                         //printk("bt3c: PACKET_TYPE=%02x\n", info->rx_skb->pkt_type);
 266
 267                         switch (info->rx_skb->pkt_type) {
 268
 269                         case HCI_EVENT_PKT:
 270                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
 271                                 info->rx_count = HCI_EVENT_HDR_SIZE;
 272                                 break;
 273
 274                         case HCI_ACLDATA_PKT:
 275                                 info->rx_state = RECV_WAIT_ACL_HEADER;
 276                                 info->rx_count = HCI_ACL_HDR_SIZE;
 277                                 break;
 278
 279                         case HCI_SCODATA_PKT:
 280                                 info->rx_state = RECV_WAIT_SCO_HEADER;
 281                                 info->rx_count = HCI_SCO_HDR_SIZE;
 282                                 break;
 283
 284                         default:
 285                                 /* Unknown packet */
 286                                 BT_ERR("Unknown HCI packet with type 0x%02x received", info->rx_skb->pkt_type);
 287                                 info->hdev->stat.err_rx++;
 288                                 clear_bit(HCI_RUNNING, &(info->hdev->flags));
 289
 290                                 kfree_skb(info->rx_skb);
 291                                 info->rx_skb = NULL;
 292                                 break;
 293
 294                         }
 295
 296                 } else {
 297
 298                         __u8 x = inb(iobase + DATA_L);
 299
 300                         *skb_put(info->rx_skb, 1) = x;
 301                         inb(iobase + DATA_H);
 302                         info->rx_count--;
 303
 304                         if (info->rx_count == 0) {
 305
 306                                 int dlen;
 307                                 struct hci_event_hdr *eh;
 308                                 struct hci_acl_hdr *ah;
 309                                 struct hci_sco_hdr *sh;
 310
 311                                 switch (info->rx_state) {
 312
 313                                 case RECV_WAIT_EVENT_HEADER:
 314                                         eh = (struct hci_event_hdr *)(info->rx_skb->data);
 315                                         info->rx_state = RECV_WAIT_DATA;
 316                                         info->rx_count = eh->plen;
 317                                         break;
 318
 319                                 case RECV_WAIT_ACL_HEADER:
 320                                         ah = (struct hci_acl_hdr *)(info->rx_skb->data);
 321                                         dlen = __le16_to_cpu(ah->dlen);
 322                                         info->rx_state = RECV_WAIT_DATA;
 323                                         info->rx_count = dlen;
 324                                         break;
 325
 326                                 case RECV_WAIT_SCO_HEADER:
 327                                         sh = (struct hci_sco_hdr *)(info->rx_skb->data);
 328                                         info->rx_state = RECV_WAIT_DATA;
 329                                         info->rx_count = sh->dlen;
 330                                         break;
 331
 332                                 case RECV_WAIT_DATA:
 333                                         hci_recv_frame(info->rx_skb);
 334                                         info->rx_skb = NULL;
 335                                         break;
 336
 337                                 }
 338
 339                         }
 340
 341                 }
 342
 343         }
 344
 345         bt3c_io_write(iobase, 0x7006, 0x0000);
 346 }
 347
 348
 349 static irqreturn_t bt3c_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
 350 {
 351         bt3c_info_t *info = dev_inst;
 352         unsigned int iobase;
 353         int iir;
 354
 355         if (!info || !info->hdev) {
 356                 BT_ERR("Call of irq %d for unknown device", irq);
 357                 return IRQ_NONE;
 358         }
 359
 360         iobase = info->link.io.BasePort1;
 361
 362         spin_lock(&(info->lock));
 363
 364         iir = inb(iobase + CONTROL);
 365         if (iir & 0x80) {
 366                 int stat = bt3c_read(iobase, 0x7001);
 367
 368                 if ((stat & 0xff) == 0x7f) {
 369                         BT_ERR("Very strange (stat=0x%04x)", stat);
 370                 } else if ((stat & 0xff) != 0xff) {
 371                         if (stat & 0x0020) {
 372                                 int stat = bt3c_read(iobase, 0x7002) & 0x10;
 373                                 BT_INFO("%s: Antenna %s", info->hdev->name,
 374                                                         stat ? "out" : "in");
 375                         }
 376                         if (stat & 0x0001)
 377                                 bt3c_receive(info);
 378                         if (stat & 0x0002) {
 379                                 //BT_ERR("Ack (stat=0x%04x)", stat);
 380                                 clear_bit(XMIT_SENDING, &(info->tx_state));
 381                                 bt3c_write_wakeup(info);
 382                         }
 383
 384                         bt3c_io_write(iobase, 0x7001, 0x0000);
 385
 386                         outb(iir, iobase + CONTROL);
 387                 }
 388         }
 389
 390         spin_unlock(&(info->lock));
 391
 392         return IRQ_HANDLED;
 393 }
 394
 395
 396
 397 /* ======================== HCI interface ======================== */
 398
 399
 400 static int bt3c_hci_flush(struct hci_dev *hdev)
 401 {
 402         bt3c_info_t *info = (bt3c_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 bt3c_hci_open(struct hci_dev *hdev)
 412 {
 413         set_bit(HCI_RUNNING, &(hdev->flags));
 414
 415         return 0;
 416 }
 417
 418
 419 static int bt3c_hci_close(struct hci_dev *hdev)
 420 {
 421         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 422                 return 0;
 423
 424         bt3c_hci_flush(hdev);
 425
 426         return 0;
 427 }
 428
 429
 430 static int bt3c_hci_send_frame(struct sk_buff *skb)
 431 {
 432         bt3c_info_t *info;
 433         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
 434         unsigned long flags;
 435
 436         if (!hdev) {
 437                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 438                 return -ENODEV;
 439         }
 440
 441         info = (bt3c_info_t *) (hdev->driver_data);
 442
 443         switch (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), &(skb->pkt_type), 1);
 457         skb_queue_tail(&(info->txq), skb);
 458
 459         spin_lock_irqsave(&(info->lock), flags);
 460
 461         bt3c_write_wakeup(info);
 462
 463         spin_unlock_irqrestore(&(info->lock), flags);
 464
 465         return 0;
 466 }
 467
 468
 469 static void bt3c_hci_destruct(struct hci_dev *hdev)
 470 {
 471 }
 472
 473
 474 static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 475 {
 476         return -ENOIOCTLCMD;
 477 }
 478
 479
 480
 481 /* ======================== Card services HCI interaction ======================== */
 482
 483
 484 static struct device *bt3c_device(void)
 485 {
 486         static struct device dev = {
 487                 .bus_id = "pcmcia",
 488         };
 489         kobject_set_name(&dev.kobj, "bt3c");
 490         kobject_init(&dev.kobj);
 491
 492         return &dev;
 493 }
 494
 495
 496 static int bt3c_load_firmware(bt3c_info_t *info, unsigned char *firmware, int count)
 497 {
 498         char *ptr = (char *) firmware;
 499         char b[9];
 500         unsigned int iobase, size, addr, fcs, tmp;
 501         int i, err = 0;
 502
 503         iobase = info->link.io.BasePort1;
 504
 505         /* Reset */
 506         bt3c_io_write(iobase, 0x8040, 0x0404);
 507         bt3c_io_write(iobase, 0x8040, 0x0400);
 508
 509         udelay(1);
 510
 511         bt3c_io_write(iobase, 0x8040, 0x0404);
 512
 513         udelay(17);
 514
 515         /* Load */
 516         while (count) {
 517                 if (ptr[0] != 'S') {
 518                         BT_ERR("Bad address in firmware");
 519                         err = -EFAULT;
 520                         goto error;
 521                 }
 522
 523                 memset(b, 0, sizeof(b));
 524                 memcpy(b, ptr + 2, 2);
 525                 size = simple_strtol(b, NULL, 16);
 526
 527                 memset(b, 0, sizeof(b));
 528                 memcpy(b, ptr + 4, 8);
 529                 addr = simple_strtol(b, NULL, 16);
 530
 531                 memset(b, 0, sizeof(b));
 532                 memcpy(b, ptr + (size * 2) + 2, 2);
 533                 fcs = simple_strtol(b, NULL, 16);
 534
 535                 memset(b, 0, sizeof(b));
 536                 for (tmp = 0, i = 0; i < size; i++) {
 537                         memcpy(b, ptr + (i * 2) + 2, 2);
 538                         tmp += simple_strtol(b, NULL, 16);
 539                 }
 540
 541                 if (((tmp + fcs) & 0xff) != 0xff) {
 542                         BT_ERR("Checksum error in firmware");
 543                         err = -EILSEQ;
 544                         goto error;
 545                 }
 546
 547                 if (ptr[1] == '3') {
 548                         bt3c_address(iobase, addr);
 549
 550                         memset(b, 0, sizeof(b));
 551                         for (i = 0; i < (size - 4) / 2; i++) {
 552                                 memcpy(b, ptr + (i * 4) + 12, 4);
 553                                 tmp = simple_strtol(b, NULL, 16);
 554                                 bt3c_put(iobase, tmp);
 555                         }
 556                 }
 557
 558                 ptr   += (size * 2) + 6;
 559                 count -= (size * 2) + 6;
 560         }
 561
 562         udelay(17);
 563
 564         /* Boot */
 565         bt3c_address(iobase, 0x3000);
 566         outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
 567
 568 error:
 569         udelay(17);
 570
 571         /* Clear */
 572         bt3c_io_write(iobase, 0x7006, 0x0000);
 573         bt3c_io_write(iobase, 0x7005, 0x0000);
 574         bt3c_io_write(iobase, 0x7001, 0x0000);
 575
 576         return err;
 577 }
 578
 579
 580 static int bt3c_open(bt3c_info_t *info)
 581 {
 582         const struct firmware *firmware;
 583         struct hci_dev *hdev;
 584         int err;
 585
 586         spin_lock_init(&(info->lock));
 587
 588         skb_queue_head_init(&(info->txq));
 589
 590         info->rx_state = RECV_WAIT_PACKET_TYPE;
 591         info->rx_count = 0;
 592         info->rx_skb = NULL;
 593
 594         /* Initialize HCI device */
 595         hdev = hci_alloc_dev();
 596         if (!hdev) {
 597                 BT_ERR("Can't allocate HCI device");
 598                 return -ENOMEM;
 599         }
 600
 601         info->hdev = hdev;
 602
 603         hdev->type = HCI_PCCARD;
 604         hdev->driver_data = info;
 605
 606         hdev->open     = bt3c_hci_open;
 607         hdev->close    = bt3c_hci_close;
 608         hdev->flush    = bt3c_hci_flush;
 609         hdev->send     = bt3c_hci_send_frame;
 610         hdev->destruct = bt3c_hci_destruct;
 611         hdev->ioctl    = bt3c_hci_ioctl;
 612
 613         hdev->owner = THIS_MODULE;
 614
 615         /* Load firmware */
 616         err = request_firmware(&firmware, "BT3CPCC.bin", bt3c_device());
 617         if (err < 0) {
 618                 BT_ERR("Firmware request failed");
 619                 goto error;
 620         }
 621
 622         err = bt3c_load_firmware(info, firmware->data, firmware->size);
 623
 624         release_firmware(firmware);
 625
 626         if (err < 0) {
 627                 BT_ERR("Firmware loading failed");
 628                 goto error;
 629         }
 630
 631         /* Timeout before it is safe to send the first HCI packet */
 632         msleep(1000);
 633
 634         /* Register HCI device */
 635         err = hci_register_dev(hdev);
 636         if (err < 0) {
 637                 BT_ERR("Can't register HCI device");
 638                 goto error;
 639         }
 640
 641         return 0;
 642
 643 error:
 644         info->hdev = NULL;
 645         hci_free_dev(hdev);
 646         return err;
 647 }
 648
 649
 650 static int bt3c_close(bt3c_info_t *info)
 651 {
 652         struct hci_dev *hdev = info->hdev;
 653
 654         if (!hdev)
 655                 return -ENODEV;
 656
 657         bt3c_hci_close(hdev);
 658
 659         if (hci_unregister_dev(hdev) < 0)
 660                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 661
 662         hci_free_dev(hdev);
 663
 664         return 0;
 665 }
 666
 667 static dev_link_t *bt3c_attach(void)
 668 {
 669         bt3c_info_t *info;
 670         client_reg_t client_reg;
 671         dev_link_t *link;
 672         int ret;
 673
 674         /* Create new info device */
 675         info = kmalloc(sizeof(*info), GFP_KERNEL);
 676         if (!info)
 677                 return NULL;
 678         memset(info, 0, sizeof(*info));
 679
 680         link = &info->link;
 681         link->priv = info;
 682
 683         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 684         link->io.NumPorts1 = 8;
 685         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 686         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 687
 688         link->irq.Handler = bt3c_interrupt;
 689         link->irq.Instance = info;
 690
 691         link->conf.Attributes = CONF_ENABLE_IRQ;
 692         link->conf.Vcc = 50;
 693         link->conf.IntType = INT_MEMORY_AND_IO;
 694
 695         /* Register with Card Services */
 696         link->next = dev_list;
 697         dev_list = link;
 698         client_reg.dev_info = &dev_info;
 699         client_reg.EventMask =
 700             CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
 701             CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
 702             CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
 703         client_reg.event_handler = &bt3c_event;
 704         client_reg.Version = 0x0210;
 705         client_reg.event_callback_args.client_data = link;
 706
 707         ret = pcmcia_register_client(&link->handle, &client_reg);
 708         if (ret != CS_SUCCESS) {
 709                 cs_error(link->handle, RegisterClient, ret);
 710                 bt3c_detach(link);
 711                 return NULL;
 712         }
 713
 714         return link;
 715 }
 716
 717
 718 static void bt3c_detach(dev_link_t *link)
 719 {
 720         bt3c_info_t *info = link->priv;
 721         dev_link_t **linkp;
 722         int ret;
 723
 724         /* Locate device structure */
 725         for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
 726                 if (*linkp == link)
 727                         break;
 728
 729         if (*linkp == NULL)
 730                 return;
 731
 732         if (link->state & DEV_CONFIG)
 733                 bt3c_release(link);
 734
 735         if (link->handle) {
 736                 ret = pcmcia_deregister_client(link->handle);
 737                 if (ret != CS_SUCCESS)
 738                         cs_error(link->handle, DeregisterClient, ret);
 739         }
 740
 741         /* Unlink device structure, free bits */
 742         *linkp = link->next;
 743
 744         kfree(info);
 745 }
 746
 747 static int get_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 748 {
 749         int i;
 750
 751         i = pcmcia_get_tuple_data(handle, tuple);
 752         if (i != CS_SUCCESS)
 753                 return i;
 754
 755         return pcmcia_parse_tuple(handle, tuple, parse);
 756 }
 757
 758 static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 759 {
 760         if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
 761                 return CS_NO_MORE_ITEMS;
 762         return get_tuple(handle, tuple, parse);
 763 }
 764
 765 static int next_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 766 {
 767         if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
 768                 return CS_NO_MORE_ITEMS;
 769         return get_tuple(handle, tuple, parse);
 770 }
 771
 772 static void bt3c_config(dev_link_t *link)
 773 {
 774         static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
 775         client_handle_t handle = link->handle;
 776         bt3c_info_t *info = link->priv;
 777         tuple_t tuple;
 778         u_short buf[256];
 779         cisparse_t parse;
 780         cistpl_cftable_entry_t *cf = &parse.cftable_entry;
 781         config_info_t config;
 782         int i, j, try, last_ret, last_fn;
 783
 784         tuple.TupleData = (cisdata_t *)buf;
 785         tuple.TupleOffset = 0;
 786         tuple.TupleDataMax = 255;
 787         tuple.Attributes = 0;
 788
 789         /* Get configuration register information */
 790         tuple.DesiredTuple = CISTPL_CONFIG;
 791         last_ret = first_tuple(handle, &tuple, &parse);
 792         if (last_ret != CS_SUCCESS) {
 793                 last_fn = ParseTuple;
 794                 goto cs_failed;
 795         }
 796         link->conf.ConfigBase = parse.config.base;
 797         link->conf.Present = parse.config.rmask[0];
 798
 799         /* Configure card */
 800         link->state |= DEV_CONFIG;
 801         i = pcmcia_get_configuration_info(handle, &config);
 802         link->conf.Vcc = config.Vcc;
 803
 804         /* First pass: look for a config entry that looks normal. */
 805         tuple.TupleData = (cisdata_t *)buf;
 806         tuple.TupleOffset = 0;
 807         tuple.TupleDataMax = 255;
 808         tuple.Attributes = 0;
 809         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 810         /* Two tries: without IO aliases, then with aliases */
 811         for (try = 0; try < 2; try++) {
 812                 i = first_tuple(handle, &tuple, &parse);
 813                 while (i != CS_NO_MORE_ITEMS) {
 814                         if (i != CS_SUCCESS)
 815                                 goto next_entry;
 816                         if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
 817                                 link->conf.Vpp1 = link->conf.Vpp2 = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
 818                         if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) {
 819                                 link->conf.ConfigIndex = cf->index;
 820                                 link->io.BasePort1 = cf->io.win[0].base;
 821                                 link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK;
 822                                 i = pcmcia_request_io(link->handle, &link->io);
 823                                 if (i == CS_SUCCESS)
 824                                         goto found_port;
 825                         }
 826 next_entry:
 827                         i = next_tuple(handle, &tuple, &parse);
 828                 }
 829         }
 830
 831         /* Second pass: try to find an entry that isn't picky about
 832            its base address, then try to grab any standard serial port
 833            address, and finally try to get any free port. */
 834         i = first_tuple(handle, &tuple, &parse);
 835         while (i != CS_NO_MORE_ITEMS) {
 836                 if ((i == CS_SUCCESS) && (cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
 837                         link->conf.ConfigIndex = cf->index;
 838                         for (j = 0; j < 5; j++) {
 839                                 link->io.BasePort1 = base[j];
 840                                 link->io.IOAddrLines = base[j] ? 16 : 3;
 841                                 i = pcmcia_request_io(link->handle, &link->io);
 842                                 if (i == CS_SUCCESS)
 843                                         goto found_port;
 844                         }
 845                 }
 846                 i = next_tuple(handle, &tuple, &parse);
 847         }
 848
 849 found_port:
 850         if (i != CS_SUCCESS) {
 851                 BT_ERR("No usable port range found");
 852                 cs_error(link->handle, RequestIO, i);
 853                 goto failed;
 854         }
 855
 856         i = pcmcia_request_irq(link->handle, &link->irq);
 857         if (i != CS_SUCCESS) {
 858                 cs_error(link->handle, RequestIRQ, i);
 859                 link->irq.AssignedIRQ = 0;
 860         }
 861
 862         i = pcmcia_request_configuration(link->handle, &link->conf);
 863         if (i != CS_SUCCESS) {
 864                 cs_error(link->handle, RequestConfiguration, i);
 865                 goto failed;
 866         }
 867
 868         if (bt3c_open(info) != 0)
 869                 goto failed;
 870
 871         strcpy(info->node.dev_name, info->hdev->name);
 872         link->dev = &info->node;
 873         link->state &= ~DEV_CONFIG_PENDING;
 874
 875         return;
 876
 877 cs_failed:
 878         cs_error(link->handle, last_fn, last_ret);
 879
 880 failed:
 881         bt3c_release(link);
 882 }
 883
 884
 885 static void bt3c_release(dev_link_t *link)
 886 {
 887         bt3c_info_t *info = link->priv;
 888
 889         if (link->state & DEV_PRESENT)
 890                 bt3c_close(info);
 891
 892         link->dev = NULL;
 893
 894         pcmcia_release_configuration(link->handle);
 895         pcmcia_release_io(link->handle, &link->io);
 896         pcmcia_release_irq(link->handle, &link->irq);
 897
 898         link->state &= ~DEV_CONFIG;
 899 }
 900
 901
 902 static int bt3c_event(event_t event, int priority, event_callback_args_t *args)
 903 {
 904         dev_link_t *link = args->client_data;
 905         bt3c_info_t *info = link->priv;
 906
 907         switch (event) {
 908         case CS_EVENT_CARD_REMOVAL:
 909                 link->state &= ~DEV_PRESENT;
 910                 if (link->state & DEV_CONFIG) {
 911                         bt3c_close(info);
 912                         bt3c_release(link);
 913                 }
 914                 break;
 915         case CS_EVENT_CARD_INSERTION:
 916                 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 917                 bt3c_config(link);
 918                 break;
 919         case CS_EVENT_PM_SUSPEND:
 920                 link->state |= DEV_SUSPEND;
 921                 /* Fall through... */
 922         case CS_EVENT_RESET_PHYSICAL:
 923                 if (link->state & DEV_CONFIG)
 924                         pcmcia_release_configuration(link->handle);
 925                 break;
 926         case CS_EVENT_PM_RESUME:
 927                 link->state &= ~DEV_SUSPEND;
 928                 /* Fall through... */
 929         case CS_EVENT_CARD_RESET:
 930                 if (DEV_OK(link))
 931                         pcmcia_request_configuration(link->handle, &link->conf);
 932                 break;
 933         }
 934
 935         return 0;
 936 }
 937
 938 static struct pcmcia_driver bt3c_driver = {
 939         .owner          = THIS_MODULE,
 940         .drv            = {
 941                 .name   = "bt3c_cs",
 942         },
 943         .attach         = bt3c_attach,
 944         .detach         = bt3c_detach,
 945 };
 946
 947 static int __init init_bt3c_cs(void)
 948 {
 949         return pcmcia_register_driver(&bt3c_driver);
 950 }
 951
 952
 953 static void __exit exit_bt3c_cs(void)
 954 {
 955         pcmcia_unregister_driver(&bt3c_driver);
 956         BUG_ON(dev_list != NULL);
 957 }
 958
 959 module_init(init_bt3c_cs);
 960 module_exit(exit_bt3c_cs);