kernel/drivers/bluetooth/bluecard_cs.c

   1 /*
   2  *
   3  *  Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)
   4  *
   5  *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
   6  *
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation;
  11  *
  12  *  Software distributed under the License is distributed on an "AS
  13  *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  14  *  implied. See the License for the specific language governing
  15  *  rights and limitations under the License.
  16  *
  17  *  The initial developer of the original code is David A. Hinds
  18  *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  19  *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  20  *
  21  */
  22
  23 #include <linux/module.h>
  24
  25 #include <linux/kernel.h>
  26 #include <linux/init.h>
  27 #include <linux/slab.h>
  28 #include <linux/types.h>
  29 #include <linux/sched.h>
  30 #include <linux/delay.h>
  31 #include <linux/timer.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 #include <linux/wait.h>
  38
  39 #include <linux/skbuff.h>
  40 #include <linux/io.h>
  41
  42 #include <pcmcia/cistpl.h>
  43 #include <pcmcia/ciscode.h>
  44 #include <pcmcia/ds.h>
  45 #include <pcmcia/cisreg.h>
  46
  47 #include <net/bluetooth/bluetooth.h>
  48 #include <net/bluetooth/hci_core.h>
  49
  50
  51
  52 /* ======================== Module parameters ======================== */
  53
  54
  55 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
  56 MODULE_DESCRIPTION("Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)");
  57 MODULE_LICENSE("GPL");
  58
  59
  60
  61 /* ======================== Local structures ======================== */
  62
  63
  64 struct bluecard_info {
  65         struct pcmcia_device *p_dev;
  66
  67         struct hci_dev *hdev;
  68
  69         spinlock_t lock;                /* For serializing operations */
  70         struct timer_list timer;        /* For LED control */
  71
  72         struct sk_buff_head txq;
  73         unsigned long tx_state;
  74
  75         unsigned long rx_state;
  76         unsigned long rx_count;
  77         struct sk_buff *rx_skb;
  78
  79         unsigned char ctrl_reg;
  80         unsigned long hw_state;         /* Status of the hardware and LED control */
  81 };
  82
  83
  84 static int bluecard_config(struct pcmcia_device *link);
  85 static void bluecard_release(struct pcmcia_device *link);
  86
  87 static void bluecard_detach(struct pcmcia_device *p_dev);
  88
  89
  90 /* Default baud rate: 57600, 115200, 230400 or 460800 */
  91 #define DEFAULT_BAUD_RATE  230400
  92
  93
  94 /* Hardware states */
  95 #define CARD_READY             1
  96 #define CARD_HAS_PCCARD_ID     4
  97 #define CARD_HAS_POWER_LED     5
  98 #define CARD_HAS_ACTIVITY_LED  6
  99
 100 /* Transmit states  */
 101 #define XMIT_SENDING         1
 102 #define XMIT_WAKEUP          2
 103 #define XMIT_BUFFER_NUMBER   5  /* unset = buffer one, set = buffer two */
 104 #define XMIT_BUF_ONE_READY   6
 105 #define XMIT_BUF_TWO_READY   7
 106 #define XMIT_SENDING_READY   8
 107
 108 /* Receiver states */
 109 #define RECV_WAIT_PACKET_TYPE   0
 110 #define RECV_WAIT_EVENT_HEADER  1
 111 #define RECV_WAIT_ACL_HEADER    2
 112 #define RECV_WAIT_SCO_HEADER    3
 113 #define RECV_WAIT_DATA          4
 114
 115 /* Special packet types */
 116 #define PKT_BAUD_RATE_57600   0x80
 117 #define PKT_BAUD_RATE_115200  0x81
 118 #define PKT_BAUD_RATE_230400  0x82
 119 #define PKT_BAUD_RATE_460800  0x83
 120
 121
 122 /* These are the register offsets */
 123 #define REG_COMMAND     0x20
 124 #define REG_INTERRUPT   0x21
 125 #define REG_CONTROL     0x22
 126 #define REG_RX_CONTROL  0x24
 127 #define REG_CARD_RESET  0x30
 128 #define REG_LED_CTRL    0x30
 129
 130 /* REG_COMMAND */
 131 #define REG_COMMAND_TX_BUF_ONE  0x01
 132 #define REG_COMMAND_TX_BUF_TWO  0x02
 133 #define REG_COMMAND_RX_BUF_ONE  0x04
 134 #define REG_COMMAND_RX_BUF_TWO  0x08
 135 #define REG_COMMAND_RX_WIN_ONE  0x00
 136 #define REG_COMMAND_RX_WIN_TWO  0x10
 137
 138 /* REG_CONTROL */
 139 #define REG_CONTROL_BAUD_RATE_57600   0x00
 140 #define REG_CONTROL_BAUD_RATE_115200  0x01
 141 #define REG_CONTROL_BAUD_RATE_230400  0x02
 142 #define REG_CONTROL_BAUD_RATE_460800  0x03
 143 #define REG_CONTROL_RTS               0x04
 144 #define REG_CONTROL_BT_ON             0x08
 145 #define REG_CONTROL_BT_RESET          0x10
 146 #define REG_CONTROL_BT_RES_PU         0x20
 147 #define REG_CONTROL_INTERRUPT         0x40
 148 #define REG_CONTROL_CARD_RESET        0x80
 149
 150 /* REG_RX_CONTROL */
 151 #define RTS_LEVEL_SHIFT_BITS  0x02
 152
 153
 154
 155 /* ======================== LED handling routines ======================== */
 156
 157
 158 static void bluecard_activity_led_timeout(u_long arg)
 159 {
 160         struct bluecard_info *info = (struct bluecard_info *)arg;
 161         unsigned int iobase = info->p_dev->resource[0]->start;
 162
 163         if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
 164                 return;
 165
 166         if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
 167                 /* Disable activity LED */
 168                 outb(0x08 | 0x20, iobase + 0x30);
 169         } else {
 170                 /* Disable power LED */
 171                 outb(0x00, iobase + 0x30);
 172         }
 173 }
 174
 175
 176 static void bluecard_enable_activity_led(struct bluecard_info *info)
 177 {
 178         unsigned int iobase = info->p_dev->resource[0]->start;
 179
 180         if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
 181                 return;
 182
 183         if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
 184                 /* Enable activity LED */
 185                 outb(0x10 | 0x40, iobase + 0x30);
 186
 187                 /* Stop the LED after HZ/4 */
 188                 mod_timer(&(info->timer), jiffies + HZ / 4);
 189         } else {
 190                 /* Enable power LED */
 191                 outb(0x08 | 0x20, iobase + 0x30);
 192
 193                 /* Stop the LED after HZ/2 */
 194                 mod_timer(&(info->timer), jiffies + HZ / 2);
 195         }
 196 }
 197
 198
 199
 200 /* ======================== Interrupt handling ======================== */
 201
 202
 203 static int bluecard_write(unsigned int iobase, unsigned int offset, __u8 *buf, int len)
 204 {
 205         int i, actual;
 206
 207         actual = (len > 15) ? 15 : len;
 208
 209         outb_p(actual, iobase + offset);
 210
 211         for (i = 0; i < actual; i++)
 212                 outb_p(buf[i], iobase + offset + i + 1);
 213
 214         return actual;
 215 }
 216
 217
 218 static void bluecard_write_wakeup(struct bluecard_info *info)
 219 {
 220         if (!info) {
 221                 BT_ERR("Unknown device");
 222                 return;
 223         }
 224
 225         if (!test_bit(XMIT_SENDING_READY, &(info->tx_state)))
 226                 return;
 227
 228         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
 229                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 230                 return;
 231         }
 232
 233         do {
 234                 unsigned int iobase = info->p_dev->resource[0]->start;
 235                 unsigned int offset;
 236                 unsigned char command;
 237                 unsigned long ready_bit;
 238                 register struct sk_buff *skb;
 239                 int len;
 240
 241                 clear_bit(XMIT_WAKEUP, &(info->tx_state));
 242
 243                 if (!pcmcia_dev_present(info->p_dev))
 244                         return;
 245
 246                 if (test_bit(XMIT_BUFFER_NUMBER, &(info->tx_state))) {
 247                         if (!test_bit(XMIT_BUF_TWO_READY, &(info->tx_state)))
 248                                 break;
 249                         offset = 0x10;
 250                         command = REG_COMMAND_TX_BUF_TWO;
 251                         ready_bit = XMIT_BUF_TWO_READY;
 252                 } else {
 253                         if (!test_bit(XMIT_BUF_ONE_READY, &(info->tx_state)))
 254                                 break;
 255                         offset = 0x00;
 256                         command = REG_COMMAND_TX_BUF_ONE;
 257                         ready_bit = XMIT_BUF_ONE_READY;
 258                 }
 259
 260                 skb = skb_dequeue(&(info->txq));
 261                 if (!skb)
 262                         break;
 263
 264                 if (bt_cb(skb)->pkt_type & 0x80) {
 265                         /* Disable RTS */
 266                         info->ctrl_reg |= REG_CONTROL_RTS;
 267                         outb(info->ctrl_reg, iobase + REG_CONTROL);
 268                 }
 269
 270                 /* Activate LED */
 271                 bluecard_enable_activity_led(info);
 272
 273                 /* Send frame */
 274                 len = bluecard_write(iobase, offset, skb->data, skb->len);
 275
 276                 /* Tell the FPGA to send the data */
 277                 outb_p(command, iobase + REG_COMMAND);
 278
 279                 /* Mark the buffer as dirty */
 280                 clear_bit(ready_bit, &(info->tx_state));
 281
 282                 if (bt_cb(skb)->pkt_type & 0x80) {
 283                         DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 284                         DEFINE_WAIT(wait);
 285
 286                         unsigned char baud_reg;
 287
 288                         switch (bt_cb(skb)->pkt_type) {
 289                         case PKT_BAUD_RATE_460800:
 290                                 baud_reg = REG_CONTROL_BAUD_RATE_460800;
 291                                 break;
 292                         case PKT_BAUD_RATE_230400:
 293                                 baud_reg = REG_CONTROL_BAUD_RATE_230400;
 294                                 break;
 295                         case PKT_BAUD_RATE_115200:
 296                                 baud_reg = REG_CONTROL_BAUD_RATE_115200;
 297                                 break;
 298                         case PKT_BAUD_RATE_57600:
 299                                 /* Fall through... */
 300                         default:
 301                                 baud_reg = REG_CONTROL_BAUD_RATE_57600;
 302                                 break;
 303                         }
 304
 305                         /* Wait until the command reaches the baseband */
 306                         prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
 307                         schedule_timeout(HZ/10);
 308                         finish_wait(&wq, &wait);
 309
 310                         /* Set baud on baseband */
 311                         info->ctrl_reg &= ~0x03;
 312                         info->ctrl_reg |= baud_reg;
 313                         outb(info->ctrl_reg, iobase + REG_CONTROL);
 314
 315                         /* Enable RTS */
 316                         info->ctrl_reg &= ~REG_CONTROL_RTS;
 317                         outb(info->ctrl_reg, iobase + REG_CONTROL);
 318
 319                         /* Wait before the next HCI packet can be send */
 320                         prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
 321                         schedule_timeout(HZ);
 322                         finish_wait(&wq, &wait);
 323                 }
 324
 325                 if (len == skb->len) {
 326                         kfree_skb(skb);
 327                 } else {
 328                         skb_pull(skb, len);
 329                         skb_queue_head(&(info->txq), skb);
 330                 }
 331
 332                 info->hdev->stat.byte_tx += len;
 333
 334                 /* Change buffer */
 335                 change_bit(XMIT_BUFFER_NUMBER, &(info->tx_state));
 336
 337         } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
 338
 339         clear_bit(XMIT_SENDING, &(info->tx_state));
 340 }
 341
 342
 343 static int bluecard_read(unsigned int iobase, unsigned int offset, __u8 *buf, int size)
 344 {
 345         int i, n, len;
 346
 347         outb(REG_COMMAND_RX_WIN_ONE, iobase + REG_COMMAND);
 348
 349         len = inb(iobase + offset);
 350         n = 0;
 351         i = 1;
 352
 353         while (n < len) {
 354
 355                 if (i == 16) {
 356                         outb(REG_COMMAND_RX_WIN_TWO, iobase + REG_COMMAND);
 357                         i = 0;
 358                 }
 359
 360                 buf[n] = inb(iobase + offset + i);
 361
 362                 n++;
 363                 i++;
 364
 365         }
 366
 367         return len;
 368 }
 369
 370
 371 static void bluecard_receive(struct bluecard_info *info,
 372                              unsigned int offset)
 373 {
 374         unsigned int iobase;
 375         unsigned char buf[31];
 376         int i, len;
 377
 378         if (!info) {
 379                 BT_ERR("Unknown device");
 380                 return;
 381         }
 382
 383         iobase = info->p_dev->resource[0]->start;
 384
 385         if (test_bit(XMIT_SENDING_READY, &(info->tx_state)))
 386                 bluecard_enable_activity_led(info);
 387
 388         len = bluecard_read(iobase, offset, buf, sizeof(buf));
 389
 390         for (i = 0; i < len; i++) {
 391
 392                 /* Allocate packet */
 393                 if (info->rx_skb == NULL) {
 394                         info->rx_state = RECV_WAIT_PACKET_TYPE;
 395                         info->rx_count = 0;
 396                         info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
 397                         if (!info->rx_skb) {
 398                                 BT_ERR("Can't allocate mem for new packet");
 399                                 return;
 400                         }
 401                 }
 402
 403                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
 404
 405                         bt_cb(info->rx_skb)->pkt_type = buf[i];
 406
 407                         switch (bt_cb(info->rx_skb)->pkt_type) {
 408
 409                         case 0x00:
 410                                 /* init packet */
 411                                 if (offset != 0x00) {
 412                                         set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
 413                                         set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
 414                                         set_bit(XMIT_SENDING_READY, &(info->tx_state));
 415                                         bluecard_write_wakeup(info);
 416                                 }
 417
 418                                 kfree_skb(info->rx_skb);
 419                                 info->rx_skb = NULL;
 420                                 break;
 421
 422                         case HCI_EVENT_PKT:
 423                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
 424                                 info->rx_count = HCI_EVENT_HDR_SIZE;
 425                                 break;
 426
 427                         case HCI_ACLDATA_PKT:
 428                                 info->rx_state = RECV_WAIT_ACL_HEADER;
 429                                 info->rx_count = HCI_ACL_HDR_SIZE;
 430                                 break;
 431
 432                         case HCI_SCODATA_PKT:
 433                                 info->rx_state = RECV_WAIT_SCO_HEADER;
 434                                 info->rx_count = HCI_SCO_HDR_SIZE;
 435                                 break;
 436
 437                         default:
 438                                 /* unknown packet */
 439                                 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
 440                                 info->hdev->stat.err_rx++;
 441
 442                                 kfree_skb(info->rx_skb);
 443                                 info->rx_skb = NULL;
 444                                 break;
 445
 446                         }
 447
 448                 } else {
 449
 450                         *skb_put(info->rx_skb, 1) = buf[i];
 451                         info->rx_count--;
 452
 453                         if (info->rx_count == 0) {
 454
 455                                 int dlen;
 456                                 struct hci_event_hdr *eh;
 457                                 struct hci_acl_hdr *ah;
 458                                 struct hci_sco_hdr *sh;
 459
 460                                 switch (info->rx_state) {
 461
 462                                 case RECV_WAIT_EVENT_HEADER:
 463                                         eh = hci_event_hdr(info->rx_skb);
 464                                         info->rx_state = RECV_WAIT_DATA;
 465                                         info->rx_count = eh->plen;
 466                                         break;
 467
 468                                 case RECV_WAIT_ACL_HEADER:
 469                                         ah = hci_acl_hdr(info->rx_skb);
 470                                         dlen = __le16_to_cpu(ah->dlen);
 471                                         info->rx_state = RECV_WAIT_DATA;
 472                                         info->rx_count = dlen;
 473                                         break;
 474
 475                                 case RECV_WAIT_SCO_HEADER:
 476                                         sh = hci_sco_hdr(info->rx_skb);
 477                                         info->rx_state = RECV_WAIT_DATA;
 478                                         info->rx_count = sh->dlen;
 479                                         break;
 480
 481                                 case RECV_WAIT_DATA:
 482                                         hci_recv_frame(info->hdev, info->rx_skb);
 483                                         info->rx_skb = NULL;
 484                                         break;
 485
 486                                 }
 487
 488                         }
 489
 490                 }
 491
 492
 493         }
 494
 495         info->hdev->stat.byte_rx += len;
 496 }
 497
 498
 499 static irqreturn_t bluecard_interrupt(int irq, void *dev_inst)
 500 {
 501         struct bluecard_info *info = dev_inst;
 502         unsigned int iobase;
 503         unsigned char reg;
 504
 505         if (!info || !info->hdev)
 506                 /* our irq handler is shared */
 507                 return IRQ_NONE;
 508
 509         if (!test_bit(CARD_READY, &(info->hw_state)))
 510                 return IRQ_HANDLED;
 511
 512         iobase = info->p_dev->resource[0]->start;
 513
 514         spin_lock(&(info->lock));
 515
 516         /* Disable interrupt */
 517         info->ctrl_reg &= ~REG_CONTROL_INTERRUPT;
 518         outb(info->ctrl_reg, iobase + REG_CONTROL);
 519
 520         reg = inb(iobase + REG_INTERRUPT);
 521
 522         if ((reg != 0x00) && (reg != 0xff)) {
 523
 524                 if (reg & 0x04) {
 525                         bluecard_receive(info, 0x00);
 526                         outb(0x04, iobase + REG_INTERRUPT);
 527                         outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
 528                 }
 529
 530                 if (reg & 0x08) {
 531                         bluecard_receive(info, 0x10);
 532                         outb(0x08, iobase + REG_INTERRUPT);
 533                         outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
 534                 }
 535
 536                 if (reg & 0x01) {
 537                         set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
 538                         outb(0x01, iobase + REG_INTERRUPT);
 539                         bluecard_write_wakeup(info);
 540                 }
 541
 542                 if (reg & 0x02) {
 543                         set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
 544                         outb(0x02, iobase + REG_INTERRUPT);
 545                         bluecard_write_wakeup(info);
 546                 }
 547
 548         }
 549
 550         /* Enable interrupt */
 551         info->ctrl_reg |= REG_CONTROL_INTERRUPT;
 552         outb(info->ctrl_reg, iobase + REG_CONTROL);
 553
 554         spin_unlock(&(info->lock));
 555
 556         return IRQ_HANDLED;
 557 }
 558
 559
 560
 561 /* ======================== Device specific HCI commands ======================== */
 562
 563
 564 static int bluecard_hci_set_baud_rate(struct hci_dev *hdev, int baud)
 565 {
 566         struct bluecard_info *info = hci_get_drvdata(hdev);
 567         struct sk_buff *skb;
 568
 569         /* Ericsson baud rate command */
 570         unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 };
 571
 572         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
 573         if (!skb) {
 574                 BT_ERR("Can't allocate mem for new packet");
 575                 return -1;
 576         }
 577
 578         switch (baud) {
 579         case 460800:
 580                 cmd[4] = 0x00;
 581                 bt_cb(skb)->pkt_type = PKT_BAUD_RATE_460800;
 582                 break;
 583         case 230400:
 584                 cmd[4] = 0x01;
 585                 bt_cb(skb)->pkt_type = PKT_BAUD_RATE_230400;
 586                 break;
 587         case 115200:
 588                 cmd[4] = 0x02;
 589                 bt_cb(skb)->pkt_type = PKT_BAUD_RATE_115200;
 590                 break;
 591         case 57600:
 592                 /* Fall through... */
 593         default:
 594                 cmd[4] = 0x03;
 595                 bt_cb(skb)->pkt_type = PKT_BAUD_RATE_57600;
 596                 break;
 597         }
 598
 599         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
 600
 601         skb_queue_tail(&(info->txq), skb);
 602
 603         bluecard_write_wakeup(info);
 604
 605         return 0;
 606 }
 607
 608
 609
 610 /* ======================== HCI interface ======================== */
 611
 612
 613 static int bluecard_hci_flush(struct hci_dev *hdev)
 614 {
 615         struct bluecard_info *info = hci_get_drvdata(hdev);
 616
 617         /* Drop TX queue */
 618         skb_queue_purge(&(info->txq));
 619
 620         return 0;
 621 }
 622
 623
 624 static int bluecard_hci_open(struct hci_dev *hdev)
 625 {
 626         struct bluecard_info *info = hci_get_drvdata(hdev);
 627
 628         if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
 629                 bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE);
 630
 631         if (test_and_set_bit(HCI_RUNNING, &(hdev->flags)))
 632                 return 0;
 633
 634         if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
 635                 unsigned int iobase = info->p_dev->resource[0]->start;
 636
 637                 /* Enable LED */
 638                 outb(0x08 | 0x20, iobase + 0x30);
 639         }
 640
 641         return 0;
 642 }
 643
 644
 645 static int bluecard_hci_close(struct hci_dev *hdev)
 646 {
 647         struct bluecard_info *info = hci_get_drvdata(hdev);
 648
 649         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 650                 return 0;
 651
 652         bluecard_hci_flush(hdev);
 653
 654         if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
 655                 unsigned int iobase = info->p_dev->resource[0]->start;
 656
 657                 /* Disable LED */
 658                 outb(0x00, iobase + 0x30);
 659         }
 660
 661         return 0;
 662 }
 663
 664
 665 static int bluecard_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 666 {
 667         struct bluecard_info *info = hci_get_drvdata(hdev);
 668
 669         switch (bt_cb(skb)->pkt_type) {
 670         case HCI_COMMAND_PKT:
 671                 hdev->stat.cmd_tx++;
 672                 break;
 673         case HCI_ACLDATA_PKT:
 674                 hdev->stat.acl_tx++;
 675                 break;
 676         case HCI_SCODATA_PKT:
 677                 hdev->stat.sco_tx++;
 678                 break;
 679         }
 680
 681         /* Prepend skb with frame type */
 682         memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
 683         skb_queue_tail(&(info->txq), skb);
 684
 685         bluecard_write_wakeup(info);
 686
 687         return 0;
 688 }
 689
 690
 691
 692 /* ======================== Card services HCI interaction ======================== */
 693
 694
 695 static int bluecard_open(struct bluecard_info *info)
 696 {
 697         unsigned int iobase = info->p_dev->resource[0]->start;
 698         struct hci_dev *hdev;
 699         unsigned char id;
 700
 701         spin_lock_init(&(info->lock));
 702
 703         init_timer(&(info->timer));
 704         info->timer.function = &bluecard_activity_led_timeout;
 705         info->timer.data = (u_long)info;
 706
 707         skb_queue_head_init(&(info->txq));
 708
 709         info->rx_state = RECV_WAIT_PACKET_TYPE;
 710         info->rx_count = 0;
 711         info->rx_skb = NULL;
 712
 713         /* Initialize HCI device */
 714         hdev = hci_alloc_dev();
 715         if (!hdev) {
 716                 BT_ERR("Can't allocate HCI device");
 717                 return -ENOMEM;
 718         }
 719
 720         info->hdev = hdev;
 721
 722         hdev->bus = HCI_PCCARD;
 723         hci_set_drvdata(hdev, info);
 724         SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
 725
 726         hdev->open  = bluecard_hci_open;
 727         hdev->close = bluecard_hci_close;
 728         hdev->flush = bluecard_hci_flush;
 729         hdev->send  = bluecard_hci_send_frame;
 730
 731         id = inb(iobase + 0x30);
 732
 733         if ((id & 0x0f) == 0x02)
 734                 set_bit(CARD_HAS_PCCARD_ID, &(info->hw_state));
 735
 736         if (id & 0x10)
 737                 set_bit(CARD_HAS_POWER_LED, &(info->hw_state));
 738
 739         if (id & 0x20)
 740                 set_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state));
 741
 742         /* Reset card */
 743         info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
 744         outb(info->ctrl_reg, iobase + REG_CONTROL);
 745
 746         /* Turn FPGA off */
 747         outb(0x80, iobase + 0x30);
 748
 749         /* Wait some time */
 750         msleep(10);
 751
 752         /* Turn FPGA on */
 753         outb(0x00, iobase + 0x30);
 754
 755         /* Activate card */
 756         info->ctrl_reg = REG_CONTROL_BT_ON | REG_CONTROL_BT_RES_PU;
 757         outb(info->ctrl_reg, iobase + REG_CONTROL);
 758
 759         /* Enable interrupt */
 760         outb(0xff, iobase + REG_INTERRUPT);
 761         info->ctrl_reg |= REG_CONTROL_INTERRUPT;
 762         outb(info->ctrl_reg, iobase + REG_CONTROL);
 763
 764         if ((id & 0x0f) == 0x03) {
 765                 /* Disable RTS */
 766                 info->ctrl_reg |= REG_CONTROL_RTS;
 767                 outb(info->ctrl_reg, iobase + REG_CONTROL);
 768
 769                 /* Set baud rate */
 770                 info->ctrl_reg |= 0x03;
 771                 outb(info->ctrl_reg, iobase + REG_CONTROL);
 772
 773                 /* Enable RTS */
 774                 info->ctrl_reg &= ~REG_CONTROL_RTS;
 775                 outb(info->ctrl_reg, iobase + REG_CONTROL);
 776
 777                 set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
 778                 set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
 779                 set_bit(XMIT_SENDING_READY, &(info->tx_state));
 780         }
 781
 782         /* Start the RX buffers */
 783         outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
 784         outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
 785
 786         /* Signal that the hardware is ready */
 787         set_bit(CARD_READY, &(info->hw_state));
 788
 789         /* Drop TX queue */
 790         skb_queue_purge(&(info->txq));
 791
 792         /* Control the point at which RTS is enabled */
 793         outb((0x0f << RTS_LEVEL_SHIFT_BITS) | 1, iobase + REG_RX_CONTROL);
 794
 795         /* Timeout before it is safe to send the first HCI packet */
 796         msleep(1250);
 797
 798         /* Register HCI device */
 799         if (hci_register_dev(hdev) < 0) {
 800                 BT_ERR("Can't register HCI device");
 801                 info->hdev = NULL;
 802                 hci_free_dev(hdev);
 803                 return -ENODEV;
 804         }
 805
 806         return 0;
 807 }
 808
 809
 810 static int bluecard_close(struct bluecard_info *info)
 811 {
 812         unsigned int iobase = info->p_dev->resource[0]->start;
 813         struct hci_dev *hdev = info->hdev;
 814
 815         if (!hdev)
 816                 return -ENODEV;
 817
 818         bluecard_hci_close(hdev);
 819
 820         clear_bit(CARD_READY, &(info->hw_state));
 821
 822         /* Reset card */
 823         info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
 824         outb(info->ctrl_reg, iobase + REG_CONTROL);
 825
 826         /* Turn FPGA off */
 827         outb(0x80, iobase + 0x30);
 828
 829         hci_unregister_dev(hdev);
 830         hci_free_dev(hdev);
 831
 832         return 0;
 833 }
 834
 835 static int bluecard_probe(struct pcmcia_device *link)
 836 {
 837         struct bluecard_info *info;
 838
 839         /* Create new info device */
 840         info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
 841         if (!info)
 842                 return -ENOMEM;
 843
 844         info->p_dev = link;
 845         link->priv = info;
 846
 847         link->config_flags |= CONF_ENABLE_IRQ;
 848
 849         return bluecard_config(link);
 850 }
 851
 852
 853 static void bluecard_detach(struct pcmcia_device *link)
 854 {
 855         bluecard_release(link);
 856 }
 857
 858
 859 static int bluecard_config(struct pcmcia_device *link)
 860 {
 861         struct bluecard_info *info = link->priv;
 862         int i, n;
 863
 864         link->config_index = 0x20;
 865
 866         link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
 867         link->resource[0]->end = 64;
 868         link->io_lines = 6;
 869
 870         for (n = 0; n < 0x400; n += 0x40) {
 871                 link->resource[0]->start = n ^ 0x300;
 872                 i = pcmcia_request_io(link);
 873                 if (i == 0)
 874                         break;
 875         }
 876
 877         if (i != 0)
 878                 goto failed;
 879
 880         i = pcmcia_request_irq(link, bluecard_interrupt);
 881         if (i != 0)
 882                 goto failed;
 883
 884         i = pcmcia_enable_device(link);
 885         if (i != 0)
 886                 goto failed;
 887
 888         if (bluecard_open(info) != 0)
 889                 goto failed;
 890
 891         return 0;
 892
 893 failed:
 894         bluecard_release(link);
 895         return -ENODEV;
 896 }
 897
 898
 899 static void bluecard_release(struct pcmcia_device *link)
 900 {
 901         struct bluecard_info *info = link->priv;
 902
 903         bluecard_close(info);
 904
 905         del_timer_sync(&(info->timer));
 906
 907         pcmcia_disable_device(link);
 908 }
 909
 910 static const struct pcmcia_device_id bluecard_ids[] = {
 911         PCMCIA_DEVICE_PROD_ID12("BlueCard", "LSE041", 0xbaf16fbf, 0x657cc15e),
 912         PCMCIA_DEVICE_PROD_ID12("BTCFCARD", "LSE139", 0xe3987764, 0x2524b59c),
 913         PCMCIA_DEVICE_PROD_ID12("WSS", "LSE039", 0x0a0736ec, 0x24e6dfab),
 914         PCMCIA_DEVICE_NULL
 915 };
 916 MODULE_DEVICE_TABLE(pcmcia, bluecard_ids);
 917
 918 static struct pcmcia_driver bluecard_driver = {
 919         .owner          = THIS_MODULE,
 920         .name           = "bluecard_cs",
 921         .probe          = bluecard_probe,
 922         .remove         = bluecard_detach,
 923         .id_table       = bluecard_ids,
 924 };
 925 module_pcmcia_driver(bluecard_driver);