git.oblomov.eu Git - linux-2.6/blob - 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/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/timer.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 #include <linux/wait.h>
  39
  40 #include <linux/skbuff.h>
  41 #include <asm/io.h>
  42
  43 #include <pcmcia/version.h>
  44 #include <pcmcia/cs_types.h>
  45 #include <pcmcia/cs.h>
  46 #include <pcmcia/cistpl.h>
  47 #include <pcmcia/ciscode.h>
  48 #include <pcmcia/ds.h>
  49 #include <pcmcia/cisreg.h>
  50
  51 #include <net/bluetooth/bluetooth.h>
  52 #include <net/bluetooth/hci_core.h>
  53
  54
  55
  56 /* ======================== Module parameters ======================== */
  57
  58
  59 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
  60 MODULE_DESCRIPTION("Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)");
  61 MODULE_LICENSE("GPL");
  62
  63
  64
  65 /* ======================== Local structures ======================== */
  66
  67
  68 typedef struct bluecard_info_t {
  69         dev_link_t link;
  70         dev_node_t node;
  71
  72         struct hci_dev *hdev;
  73
  74         spinlock_t lock;                /* For serializing operations */
  75         struct timer_list timer;        /* For LED control */
  76
  77         struct sk_buff_head txq;
  78         unsigned long tx_state;
  79
  80         unsigned long rx_state;
  81         unsigned long rx_count;
  82         struct sk_buff *rx_skb;
  83
  84         unsigned char ctrl_reg;
  85         unsigned long hw_state;         /* Status of the hardware and LED control */
  86 } bluecard_info_t;
  87
  88
  89 static void bluecard_config(dev_link_t *link);
  90 static void bluecard_release(dev_link_t *link);
  91 static int bluecard_event(event_t event, int priority, event_callback_args_t *args);
  92
  93 static dev_info_t dev_info = "bluecard_cs";
  94
  95 static dev_link_t *bluecard_attach(void);
  96 static void bluecard_detach(dev_link_t *);
  97
  98 static dev_link_t *dev_list = NULL;
  99
 100
 101 /* Default baud rate: 57600, 115200, 230400 or 460800 */
 102 #define DEFAULT_BAUD_RATE  230400
 103
 104
 105 /* Hardware states */
 106 #define CARD_READY             1
 107 #define CARD_HAS_PCCARD_ID     4
 108 #define CARD_HAS_POWER_LED     5
 109 #define CARD_HAS_ACTIVITY_LED  6
 110
 111 /* Transmit states  */
 112 #define XMIT_SENDING         1
 113 #define XMIT_WAKEUP          2
 114 #define XMIT_BUFFER_NUMBER   5  /* unset = buffer one, set = buffer two */
 115 #define XMIT_BUF_ONE_READY   6
 116 #define XMIT_BUF_TWO_READY   7
 117 #define XMIT_SENDING_READY   8
 118
 119 /* Receiver states */
 120 #define RECV_WAIT_PACKET_TYPE   0
 121 #define RECV_WAIT_EVENT_HEADER  1
 122 #define RECV_WAIT_ACL_HEADER    2
 123 #define RECV_WAIT_SCO_HEADER    3
 124 #define RECV_WAIT_DATA          4
 125
 126 /* Special packet types */
 127 #define PKT_BAUD_RATE_57600   0x80
 128 #define PKT_BAUD_RATE_115200  0x81
 129 #define PKT_BAUD_RATE_230400  0x82
 130 #define PKT_BAUD_RATE_460800  0x83
 131
 132
 133 /* These are the register offsets */
 134 #define REG_COMMAND     0x20
 135 #define REG_INTERRUPT   0x21
 136 #define REG_CONTROL     0x22
 137 #define REG_RX_CONTROL  0x24
 138 #define REG_CARD_RESET  0x30
 139 #define REG_LED_CTRL    0x30
 140
 141 /* REG_COMMAND */
 142 #define REG_COMMAND_TX_BUF_ONE  0x01
 143 #define REG_COMMAND_TX_BUF_TWO  0x02
 144 #define REG_COMMAND_RX_BUF_ONE  0x04
 145 #define REG_COMMAND_RX_BUF_TWO  0x08
 146 #define REG_COMMAND_RX_WIN_ONE  0x00
 147 #define REG_COMMAND_RX_WIN_TWO  0x10
 148
 149 /* REG_CONTROL */
 150 #define REG_CONTROL_BAUD_RATE_57600   0x00
 151 #define REG_CONTROL_BAUD_RATE_115200  0x01
 152 #define REG_CONTROL_BAUD_RATE_230400  0x02
 153 #define REG_CONTROL_BAUD_RATE_460800  0x03
 154 #define REG_CONTROL_RTS               0x04
 155 #define REG_CONTROL_BT_ON             0x08
 156 #define REG_CONTROL_BT_RESET          0x10
 157 #define REG_CONTROL_BT_RES_PU         0x20
 158 #define REG_CONTROL_INTERRUPT         0x40
 159 #define REG_CONTROL_CARD_RESET        0x80
 160
 161 /* REG_RX_CONTROL */
 162 #define RTS_LEVEL_SHIFT_BITS  0x02
 163
 164
 165
 166 /* ======================== LED handling routines ======================== */
 167
 168
 169 static void bluecard_activity_led_timeout(u_long arg)
 170 {
 171         bluecard_info_t *info = (bluecard_info_t *)arg;
 172         unsigned int iobase = info->link.io.BasePort1;
 173
 174         if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
 175                 return;
 176
 177         if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
 178                 /* Disable activity LED */
 179                 outb(0x08 | 0x20, iobase + 0x30);
 180         } else {
 181                 /* Disable power LED */
 182                 outb(0x00, iobase + 0x30);
 183         }
 184 }
 185
 186
 187 static void bluecard_enable_activity_led(bluecard_info_t *info)
 188 {
 189         unsigned int iobase = info->link.io.BasePort1;
 190
 191         if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
 192                 return;
 193
 194         if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
 195                 /* Enable activity LED */
 196                 outb(0x10 | 0x40, iobase + 0x30);
 197
 198                 /* Stop the LED after HZ/4 */
 199                 mod_timer(&(info->timer), jiffies + HZ / 4);
 200         } else {
 201                 /* Enable power LED */
 202                 outb(0x08 | 0x20, iobase + 0x30);
 203
 204                 /* Stop the LED after HZ/2 */
 205                 mod_timer(&(info->timer), jiffies + HZ / 2);
 206         }
 207 }
 208
 209
 210
 211 /* ======================== Interrupt handling ======================== */
 212
 213
 214 static int bluecard_write(unsigned int iobase, unsigned int offset, __u8 *buf, int len)
 215 {
 216         int i, actual;
 217
 218         actual = (len > 15) ? 15 : len;
 219
 220         outb_p(actual, iobase + offset);
 221
 222         for (i = 0; i < actual; i++)
 223                 outb_p(buf[i], iobase + offset + i + 1);
 224
 225         return actual;
 226 }
 227
 228
 229 static void bluecard_write_wakeup(bluecard_info_t *info)
 230 {
 231         if (!info) {
 232                 BT_ERR("Unknown device");
 233                 return;
 234         }
 235
 236         if (!test_bit(XMIT_SENDING_READY, &(info->tx_state)))
 237                 return;
 238
 239         if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
 240                 set_bit(XMIT_WAKEUP, &(info->tx_state));
 241                 return;
 242         }
 243
 244         do {
 245                 register unsigned int iobase = info->link.io.BasePort1;
 246                 register unsigned int offset;
 247                 register unsigned char command;
 248                 register unsigned long ready_bit;
 249                 register struct sk_buff *skb;
 250                 register int len;
 251
 252                 clear_bit(XMIT_WAKEUP, &(info->tx_state));
 253
 254                 if (!(info->link.state & DEV_PRESENT))
 255                         return;
 256
 257                 if (test_bit(XMIT_BUFFER_NUMBER, &(info->tx_state))) {
 258                         if (!test_bit(XMIT_BUF_TWO_READY, &(info->tx_state)))
 259                                 break;
 260                         offset = 0x10;
 261                         command = REG_COMMAND_TX_BUF_TWO;
 262                         ready_bit = XMIT_BUF_TWO_READY;
 263                 } else {
 264                         if (!test_bit(XMIT_BUF_ONE_READY, &(info->tx_state)))
 265                                 break;
 266                         offset = 0x00;
 267                         command = REG_COMMAND_TX_BUF_ONE;
 268                         ready_bit = XMIT_BUF_ONE_READY;
 269                 }
 270
 271                 if (!(skb = skb_dequeue(&(info->txq))))
 272                         break;
 273
 274                 if (skb->pkt_type & 0x80) {
 275                         /* Disable RTS */
 276                         info->ctrl_reg |= REG_CONTROL_RTS;
 277                         outb(info->ctrl_reg, iobase + REG_CONTROL);
 278                 }
 279
 280                 /* Activate LED */
 281                 bluecard_enable_activity_led(info);
 282
 283                 /* Send frame */
 284                 len = bluecard_write(iobase, offset, skb->data, skb->len);
 285
 286                 /* Tell the FPGA to send the data */
 287                 outb_p(command, iobase + REG_COMMAND);
 288
 289                 /* Mark the buffer as dirty */
 290                 clear_bit(ready_bit, &(info->tx_state));
 291
 292                 if (skb->pkt_type & 0x80) {
 293                         DECLARE_WAIT_QUEUE_HEAD(wq);
 294                         DEFINE_WAIT(wait);
 295
 296                         unsigned char baud_reg;
 297
 298                         switch (skb->pkt_type) {
 299                         case PKT_BAUD_RATE_460800:
 300                                 baud_reg = REG_CONTROL_BAUD_RATE_460800;
 301                                 break;
 302                         case PKT_BAUD_RATE_230400:
 303                                 baud_reg = REG_CONTROL_BAUD_RATE_230400;
 304                                 break;
 305                         case PKT_BAUD_RATE_115200:
 306                                 baud_reg = REG_CONTROL_BAUD_RATE_115200;
 307                                 break;
 308                         case PKT_BAUD_RATE_57600:
 309                                 /* Fall through... */
 310                         default:
 311                                 baud_reg = REG_CONTROL_BAUD_RATE_57600;
 312                                 break;
 313                         }
 314
 315                         /* Wait until the command reaches the baseband */
 316                         prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
 317                         schedule_timeout(HZ/10);
 318                         finish_wait(&wq, &wait);
 319
 320                         /* Set baud on baseband */
 321                         info->ctrl_reg &= ~0x03;
 322                         info->ctrl_reg |= baud_reg;
 323                         outb(info->ctrl_reg, iobase + REG_CONTROL);
 324
 325                         /* Enable RTS */
 326                         info->ctrl_reg &= ~REG_CONTROL_RTS;
 327                         outb(info->ctrl_reg, iobase + REG_CONTROL);
 328
 329                         /* Wait before the next HCI packet can be send */
 330                         prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
 331                         schedule_timeout(HZ);
 332                         finish_wait(&wq, &wait);
 333                 }
 334
 335                 if (len == skb->len) {
 336                         kfree_skb(skb);
 337                 } else {
 338                         skb_pull(skb, len);
 339                         skb_queue_head(&(info->txq), skb);
 340                 }
 341
 342                 info->hdev->stat.byte_tx += len;
 343
 344                 /* Change buffer */
 345                 change_bit(XMIT_BUFFER_NUMBER, &(info->tx_state));
 346
 347         } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
 348
 349         clear_bit(XMIT_SENDING, &(info->tx_state));
 350 }
 351
 352
 353 static int bluecard_read(unsigned int iobase, unsigned int offset, __u8 *buf, int size)
 354 {
 355         int i, n, len;
 356
 357         outb(REG_COMMAND_RX_WIN_ONE, iobase + REG_COMMAND);
 358
 359         len = inb(iobase + offset);
 360         n = 0;
 361         i = 1;
 362
 363         while (n < len) {
 364
 365                 if (i == 16) {
 366                         outb(REG_COMMAND_RX_WIN_TWO, iobase + REG_COMMAND);
 367                         i = 0;
 368                 }
 369
 370                 buf[n] = inb(iobase + offset + i);
 371
 372                 n++;
 373                 i++;
 374
 375         }
 376
 377         return len;
 378 }
 379
 380
 381 static void bluecard_receive(bluecard_info_t *info, unsigned int offset)
 382 {
 383         unsigned int iobase;
 384         unsigned char buf[31];
 385         int i, len;
 386
 387         if (!info) {
 388                 BT_ERR("Unknown device");
 389                 return;
 390         }
 391
 392         iobase = info->link.io.BasePort1;
 393
 394         if (test_bit(XMIT_SENDING_READY, &(info->tx_state)))
 395                 bluecard_enable_activity_led(info);
 396
 397         len = bluecard_read(iobase, offset, buf, sizeof(buf));
 398
 399         for (i = 0; i < len; i++) {
 400
 401                 /* Allocate packet */
 402                 if (info->rx_skb == NULL) {
 403                         info->rx_state = RECV_WAIT_PACKET_TYPE;
 404                         info->rx_count = 0;
 405                         if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 406                                 BT_ERR("Can't allocate mem for new packet");
 407                                 return;
 408                         }
 409                 }
 410
 411                 if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
 412
 413                         info->rx_skb->dev = (void *) info->hdev;
 414                         info->rx_skb->pkt_type = buf[i];
 415
 416                         switch (info->rx_skb->pkt_type) {
 417
 418                         case 0x00:
 419                                 /* init packet */
 420                                 if (offset != 0x00) {
 421                                         set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
 422                                         set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
 423                                         set_bit(XMIT_SENDING_READY, &(info->tx_state));
 424                                         bluecard_write_wakeup(info);
 425                                 }
 426
 427                                 kfree_skb(info->rx_skb);
 428                                 info->rx_skb = NULL;
 429                                 break;
 430
 431                         case HCI_EVENT_PKT:
 432                                 info->rx_state = RECV_WAIT_EVENT_HEADER;
 433                                 info->rx_count = HCI_EVENT_HDR_SIZE;
 434                                 break;
 435
 436                         case HCI_ACLDATA_PKT:
 437                                 info->rx_state = RECV_WAIT_ACL_HEADER;
 438                                 info->rx_count = HCI_ACL_HDR_SIZE;
 439                                 break;
 440
 441                         case HCI_SCODATA_PKT:
 442                                 info->rx_state = RECV_WAIT_SCO_HEADER;
 443                                 info->rx_count = HCI_SCO_HDR_SIZE;
 444                                 break;
 445
 446                         default:
 447                                 /* unknown packet */
 448                                 BT_ERR("Unknown HCI packet with type 0x%02x received", info->rx_skb->pkt_type);
 449                                 info->hdev->stat.err_rx++;
 450
 451                                 kfree_skb(info->rx_skb);
 452                                 info->rx_skb = NULL;
 453                                 break;
 454
 455                         }
 456
 457                 } else {
 458
 459                         *skb_put(info->rx_skb, 1) = buf[i];
 460                         info->rx_count--;
 461
 462                         if (info->rx_count == 0) {
 463
 464                                 int dlen;
 465                                 struct hci_event_hdr *eh;
 466                                 struct hci_acl_hdr *ah;
 467                                 struct hci_sco_hdr *sh;
 468
 469                                 switch (info->rx_state) {
 470
 471                                 case RECV_WAIT_EVENT_HEADER:
 472                                         eh = (struct hci_event_hdr *)(info->rx_skb->data);
 473                                         info->rx_state = RECV_WAIT_DATA;
 474                                         info->rx_count = eh->plen;
 475                                         break;
 476
 477                                 case RECV_WAIT_ACL_HEADER:
 478                                         ah = (struct hci_acl_hdr *)(info->rx_skb->data);
 479                                         dlen = __le16_to_cpu(ah->dlen);
 480                                         info->rx_state = RECV_WAIT_DATA;
 481                                         info->rx_count = dlen;
 482                                         break;
 483
 484                                 case RECV_WAIT_SCO_HEADER:
 485                                         sh = (struct hci_sco_hdr *)(info->rx_skb->data);
 486                                         info->rx_state = RECV_WAIT_DATA;
 487                                         info->rx_count = sh->dlen;
 488                                         break;
 489
 490                                 case RECV_WAIT_DATA:
 491                                         hci_recv_frame(info->rx_skb);
 492                                         info->rx_skb = NULL;
 493                                         break;
 494
 495                                 }
 496
 497                         }
 498
 499                 }
 500
 501
 502         }
 503
 504         info->hdev->stat.byte_rx += len;
 505 }
 506
 507
 508 static irqreturn_t bluecard_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
 509 {
 510         bluecard_info_t *info = dev_inst;
 511         unsigned int iobase;
 512         unsigned char reg;
 513
 514         if (!info || !info->hdev) {
 515                 BT_ERR("Call of irq %d for unknown device", irq);
 516                 return IRQ_NONE;
 517         }
 518
 519         if (!test_bit(CARD_READY, &(info->hw_state)))
 520                 return IRQ_HANDLED;
 521
 522         iobase = info->link.io.BasePort1;
 523
 524         spin_lock(&(info->lock));
 525
 526         /* Disable interrupt */
 527         info->ctrl_reg &= ~REG_CONTROL_INTERRUPT;
 528         outb(info->ctrl_reg, iobase + REG_CONTROL);
 529
 530         reg = inb(iobase + REG_INTERRUPT);
 531
 532         if ((reg != 0x00) && (reg != 0xff)) {
 533
 534                 if (reg & 0x04) {
 535                         bluecard_receive(info, 0x00);
 536                         outb(0x04, iobase + REG_INTERRUPT);
 537                         outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
 538                 }
 539
 540                 if (reg & 0x08) {
 541                         bluecard_receive(info, 0x10);
 542                         outb(0x08, iobase + REG_INTERRUPT);
 543                         outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
 544                 }
 545
 546                 if (reg & 0x01) {
 547                         set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
 548                         outb(0x01, iobase + REG_INTERRUPT);
 549                         bluecard_write_wakeup(info);
 550                 }
 551
 552                 if (reg & 0x02) {
 553                         set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
 554                         outb(0x02, iobase + REG_INTERRUPT);
 555                         bluecard_write_wakeup(info);
 556                 }
 557
 558         }
 559
 560         /* Enable interrupt */
 561         info->ctrl_reg |= REG_CONTROL_INTERRUPT;
 562         outb(info->ctrl_reg, iobase + REG_CONTROL);
 563
 564         spin_unlock(&(info->lock));
 565
 566         return IRQ_HANDLED;
 567 }
 568
 569
 570
 571 /* ======================== Device specific HCI commands ======================== */
 572
 573
 574 static int bluecard_hci_set_baud_rate(struct hci_dev *hdev, int baud)
 575 {
 576         bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
 577         struct sk_buff *skb;
 578
 579         /* Ericsson baud rate command */
 580         unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 };
 581
 582         if (!(skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
 583                 BT_ERR("Can't allocate mem for new packet");
 584                 return -1;
 585         }
 586
 587         switch (baud) {
 588         case 460800:
 589                 cmd[4] = 0x00;
 590                 skb->pkt_type = PKT_BAUD_RATE_460800;
 591                 break;
 592         case 230400:
 593                 cmd[4] = 0x01;
 594                 skb->pkt_type = PKT_BAUD_RATE_230400;
 595                 break;
 596         case 115200:
 597                 cmd[4] = 0x02;
 598                 skb->pkt_type = PKT_BAUD_RATE_115200;
 599                 break;
 600         case 57600:
 601                 /* Fall through... */
 602         default:
 603                 cmd[4] = 0x03;
 604                 skb->pkt_type = PKT_BAUD_RATE_57600;
 605                 break;
 606         }
 607
 608         memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
 609
 610         skb_queue_tail(&(info->txq), skb);
 611
 612         bluecard_write_wakeup(info);
 613
 614         return 0;
 615 }
 616
 617
 618
 619 /* ======================== HCI interface ======================== */
 620
 621
 622 static int bluecard_hci_flush(struct hci_dev *hdev)
 623 {
 624         bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
 625
 626         /* Drop TX queue */
 627         skb_queue_purge(&(info->txq));
 628
 629         return 0;
 630 }
 631
 632
 633 static int bluecard_hci_open(struct hci_dev *hdev)
 634 {
 635         bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
 636         unsigned int iobase = info->link.io.BasePort1;
 637
 638         if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
 639                 bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE);
 640
 641         if (test_and_set_bit(HCI_RUNNING, &(hdev->flags)))
 642                 return 0;
 643
 644         if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
 645                 /* Enable LED */
 646                 outb(0x08 | 0x20, iobase + 0x30);
 647         }
 648
 649         return 0;
 650 }
 651
 652
 653 static int bluecard_hci_close(struct hci_dev *hdev)
 654 {
 655         bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
 656         unsigned int iobase = info->link.io.BasePort1;
 657
 658         if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
 659                 return 0;
 660
 661         bluecard_hci_flush(hdev);
 662
 663         if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
 664                 /* Disable LED */
 665                 outb(0x00, iobase + 0x30);
 666         }
 667
 668         return 0;
 669 }
 670
 671
 672 static int bluecard_hci_send_frame(struct sk_buff *skb)
 673 {
 674         bluecard_info_t *info;
 675         struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
 676
 677         if (!hdev) {
 678                 BT_ERR("Frame for unknown HCI device (hdev=NULL)");
 679                 return -ENODEV;
 680         }
 681
 682         info = (bluecard_info_t *)(hdev->driver_data);
 683
 684         switch (skb->pkt_type) {
 685         case HCI_COMMAND_PKT:
 686                 hdev->stat.cmd_tx++;
 687                 break;
 688         case HCI_ACLDATA_PKT:
 689                 hdev->stat.acl_tx++;
 690                 break;
 691         case HCI_SCODATA_PKT:
 692                 hdev->stat.sco_tx++;
 693                 break;
 694         };
 695
 696         /* Prepend skb with frame type */
 697         memcpy(skb_push(skb, 1), &(skb->pkt_type), 1);
 698         skb_queue_tail(&(info->txq), skb);
 699
 700         bluecard_write_wakeup(info);
 701
 702         return 0;
 703 }
 704
 705
 706 static void bluecard_hci_destruct(struct hci_dev *hdev)
 707 {
 708 }
 709
 710
 711 static int bluecard_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
 712 {
 713         return -ENOIOCTLCMD;
 714 }
 715
 716
 717
 718 /* ======================== Card services HCI interaction ======================== */
 719
 720
 721 static int bluecard_open(bluecard_info_t *info)
 722 {
 723         unsigned int iobase = info->link.io.BasePort1;
 724         struct hci_dev *hdev;
 725         unsigned char id;
 726
 727         spin_lock_init(&(info->lock));
 728
 729         init_timer(&(info->timer));
 730         info->timer.function = &bluecard_activity_led_timeout;
 731         info->timer.data = (u_long)info;
 732
 733         skb_queue_head_init(&(info->txq));
 734
 735         info->rx_state = RECV_WAIT_PACKET_TYPE;
 736         info->rx_count = 0;
 737         info->rx_skb = NULL;
 738
 739         /* Initialize HCI device */
 740         hdev = hci_alloc_dev();
 741         if (!hdev) {
 742                 BT_ERR("Can't allocate HCI device");
 743                 return -ENOMEM;
 744         }
 745
 746         info->hdev = hdev;
 747
 748         hdev->type = HCI_PCCARD;
 749         hdev->driver_data = info;
 750
 751         hdev->open     = bluecard_hci_open;
 752         hdev->close    = bluecard_hci_close;
 753         hdev->flush    = bluecard_hci_flush;
 754         hdev->send     = bluecard_hci_send_frame;
 755         hdev->destruct = bluecard_hci_destruct;
 756         hdev->ioctl    = bluecard_hci_ioctl;
 757
 758         hdev->owner = THIS_MODULE;
 759
 760         id = inb(iobase + 0x30);
 761
 762         if ((id & 0x0f) == 0x02)
 763                 set_bit(CARD_HAS_PCCARD_ID, &(info->hw_state));
 764
 765         if (id & 0x10)
 766                 set_bit(CARD_HAS_POWER_LED, &(info->hw_state));
 767
 768         if (id & 0x20)
 769                 set_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state));
 770
 771         /* Reset card */
 772         info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
 773         outb(info->ctrl_reg, iobase + REG_CONTROL);
 774
 775         /* Turn FPGA off */
 776         outb(0x80, iobase + 0x30);
 777
 778         /* Wait some time */
 779         msleep(10);
 780
 781         /* Turn FPGA on */
 782         outb(0x00, iobase + 0x30);
 783
 784         /* Activate card */
 785         info->ctrl_reg = REG_CONTROL_BT_ON | REG_CONTROL_BT_RES_PU;
 786         outb(info->ctrl_reg, iobase + REG_CONTROL);
 787
 788         /* Enable interrupt */
 789         outb(0xff, iobase + REG_INTERRUPT);
 790         info->ctrl_reg |= REG_CONTROL_INTERRUPT;
 791         outb(info->ctrl_reg, iobase + REG_CONTROL);
 792
 793         if ((id & 0x0f) == 0x03) {
 794                 /* Disable RTS */
 795                 info->ctrl_reg |= REG_CONTROL_RTS;
 796                 outb(info->ctrl_reg, iobase + REG_CONTROL);
 797
 798                 /* Set baud rate */
 799                 info->ctrl_reg |= 0x03;
 800                 outb(info->ctrl_reg, iobase + REG_CONTROL);
 801
 802                 /* Enable RTS */
 803                 info->ctrl_reg &= ~REG_CONTROL_RTS;
 804                 outb(info->ctrl_reg, iobase + REG_CONTROL);
 805
 806                 set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
 807                 set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
 808                 set_bit(XMIT_SENDING_READY, &(info->tx_state));
 809         }
 810
 811         /* Start the RX buffers */
 812         outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
 813         outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
 814
 815         /* Signal that the hardware is ready */
 816         set_bit(CARD_READY, &(info->hw_state));
 817
 818         /* Drop TX queue */
 819         skb_queue_purge(&(info->txq));
 820
 821         /* Control the point at which RTS is enabled */
 822         outb((0x0f << RTS_LEVEL_SHIFT_BITS) | 1, iobase + REG_RX_CONTROL);
 823
 824         /* Timeout before it is safe to send the first HCI packet */
 825         msleep(1250);
 826
 827         /* Register HCI device */
 828         if (hci_register_dev(hdev) < 0) {
 829                 BT_ERR("Can't register HCI device");
 830                 info->hdev = NULL;
 831                 hci_free_dev(hdev);
 832                 return -ENODEV;
 833         }
 834
 835         return 0;
 836 }
 837
 838
 839 static int bluecard_close(bluecard_info_t *info)
 840 {
 841         unsigned int iobase = info->link.io.BasePort1;
 842         struct hci_dev *hdev = info->hdev;
 843
 844         if (!hdev)
 845                 return -ENODEV;
 846
 847         bluecard_hci_close(hdev);
 848
 849         clear_bit(CARD_READY, &(info->hw_state));
 850
 851         /* Reset card */
 852         info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
 853         outb(info->ctrl_reg, iobase + REG_CONTROL);
 854
 855         /* Turn FPGA off */
 856         outb(0x80, iobase + 0x30);
 857
 858         if (hci_unregister_dev(hdev) < 0)
 859                 BT_ERR("Can't unregister HCI device %s", hdev->name);
 860
 861         hci_free_dev(hdev);
 862
 863         return 0;
 864 }
 865
 866 static dev_link_t *bluecard_attach(void)
 867 {
 868         bluecard_info_t *info;
 869         client_reg_t client_reg;
 870         dev_link_t *link;
 871         int ret;
 872
 873         /* Create new info device */
 874         info = kmalloc(sizeof(*info), GFP_KERNEL);
 875         if (!info)
 876                 return NULL;
 877         memset(info, 0, sizeof(*info));
 878
 879         link = &info->link;
 880         link->priv = info;
 881
 882         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 883         link->io.NumPorts1 = 8;
 884         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 885         link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 886
 887         link->irq.Handler = bluecard_interrupt;
 888         link->irq.Instance = info;
 889
 890         link->conf.Attributes = CONF_ENABLE_IRQ;
 891         link->conf.Vcc = 50;
 892         link->conf.IntType = INT_MEMORY_AND_IO;
 893
 894         /* Register with Card Services */
 895         link->next = dev_list;
 896         dev_list = link;
 897         client_reg.dev_info = &dev_info;
 898         client_reg.EventMask =
 899                 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
 900                 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
 901                 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
 902         client_reg.event_handler = &bluecard_event;
 903         client_reg.Version = 0x0210;
 904         client_reg.event_callback_args.client_data = link;
 905
 906         ret = pcmcia_register_client(&link->handle, &client_reg);
 907         if (ret != CS_SUCCESS) {
 908                 cs_error(link->handle, RegisterClient, ret);
 909                 bluecard_detach(link);
 910                 return NULL;
 911         }
 912
 913         return link;
 914 }
 915
 916
 917 static void bluecard_detach(dev_link_t *link)
 918 {
 919         bluecard_info_t *info = link->priv;
 920         dev_link_t **linkp;
 921         int ret;
 922
 923         /* Locate device structure */
 924         for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
 925                 if (*linkp == link)
 926                         break;
 927
 928         if (*linkp == NULL)
 929                 return;
 930
 931         if (link->state & DEV_CONFIG)
 932                 bluecard_release(link);
 933
 934         if (link->handle) {
 935                 ret = pcmcia_deregister_client(link->handle);
 936                 if (ret != CS_SUCCESS)
 937                         cs_error(link->handle, DeregisterClient, ret);
 938         }
 939
 940         /* Unlink device structure, free bits */
 941         *linkp = link->next;
 942
 943         kfree(info);
 944 }
 945
 946
 947 static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
 948 {
 949         int i;
 950
 951         i = pcmcia_get_first_tuple(handle, tuple);
 952         if (i != CS_SUCCESS)
 953                 return CS_NO_MORE_ITEMS;
 954
 955         i = pcmcia_get_tuple_data(handle, tuple);
 956         if (i != CS_SUCCESS)
 957                 return i;
 958
 959         return pcmcia_parse_tuple(handle, tuple, parse);
 960 }
 961
 962 static void bluecard_config(dev_link_t *link)
 963 {
 964         client_handle_t handle = link->handle;
 965         bluecard_info_t *info = link->priv;
 966         tuple_t tuple;
 967         u_short buf[256];
 968         cisparse_t parse;
 969         config_info_t config;
 970         int i, n, last_ret, last_fn;
 971
 972         tuple.TupleData = (cisdata_t *)buf;
 973         tuple.TupleOffset = 0;
 974         tuple.TupleDataMax = 255;
 975         tuple.Attributes = 0;
 976
 977         /* Get configuration register information */
 978         tuple.DesiredTuple = CISTPL_CONFIG;
 979         last_ret = first_tuple(handle, &tuple, &parse);
 980         if (last_ret != CS_SUCCESS) {
 981                 last_fn = ParseTuple;
 982                 goto cs_failed;
 983         }
 984         link->conf.ConfigBase = parse.config.base;
 985         link->conf.Present = parse.config.rmask[0];
 986
 987         /* Configure card */
 988         link->state |= DEV_CONFIG;
 989         i = pcmcia_get_configuration_info(handle, &config);
 990         link->conf.Vcc = config.Vcc;
 991
 992         link->conf.ConfigIndex = 0x20;
 993         link->io.NumPorts1 = 64;
 994         link->io.IOAddrLines = 6;
 995
 996         for (n = 0; n < 0x400; n += 0x40) {
 997                 link->io.BasePort1 = n ^ 0x300;
 998                 i = pcmcia_request_io(link->handle, &link->io);
 999                 if (i == CS_SUCCESS)
1000                         break;
1001         }
1002
1003         if (i != CS_SUCCESS) {
1004                 cs_error(link->handle, RequestIO, i);
1005                 goto failed;
1006         }
1007
1008         i = pcmcia_request_irq(link->handle, &link->irq);
1009         if (i != CS_SUCCESS) {
1010                 cs_error(link->handle, RequestIRQ, i);
1011                 link->irq.AssignedIRQ = 0;
1012         }
1013
1014         i = pcmcia_request_configuration(link->handle, &link->conf);
1015         if (i != CS_SUCCESS) {
1016                 cs_error(link->handle, RequestConfiguration, i);
1017                 goto failed;
1018         }
1019
1020         if (bluecard_open(info) != 0)
1021                 goto failed;
1022
1023         strcpy(info->node.dev_name, info->hdev->name);
1024         link->dev = &info->node;
1025         link->state &= ~DEV_CONFIG_PENDING;
1026
1027         return;
1028
1029 cs_failed:
1030         cs_error(link->handle, last_fn, last_ret);
1031
1032 failed:
1033         bluecard_release(link);
1034 }
1035
1036
1037 static void bluecard_release(dev_link_t *link)
1038 {
1039         bluecard_info_t *info = link->priv;
1040
1041         if (link->state & DEV_PRESENT)
1042                 bluecard_close(info);
1043
1044         del_timer(&(info->timer));
1045
1046         link->dev = NULL;
1047
1048         pcmcia_release_configuration(link->handle);
1049         pcmcia_release_io(link->handle, &link->io);
1050         pcmcia_release_irq(link->handle, &link->irq);
1051
1052         link->state &= ~DEV_CONFIG;
1053 }
1054
1055
1056 static int bluecard_event(event_t event, int priority, event_callback_args_t *args)
1057 {
1058         dev_link_t *link = args->client_data;
1059         bluecard_info_t *info = link->priv;
1060
1061         switch (event) {
1062         case CS_EVENT_CARD_REMOVAL:
1063                 link->state &= ~DEV_PRESENT;
1064                 if (link->state & DEV_CONFIG) {
1065                         bluecard_close(info);
1066                         bluecard_release(link);
1067                 }
1068                 break;
1069         case CS_EVENT_CARD_INSERTION:
1070                 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
1071                 bluecard_config(link);
1072                 break;
1073         case CS_EVENT_PM_SUSPEND:
1074                 link->state |= DEV_SUSPEND;
1075                 /* Fall through... */
1076         case CS_EVENT_RESET_PHYSICAL:
1077                 if (link->state & DEV_CONFIG)
1078                         pcmcia_release_configuration(link->handle);
1079                 break;
1080         case CS_EVENT_PM_RESUME:
1081                 link->state &= ~DEV_SUSPEND;
1082                 /* Fall through... */
1083         case CS_EVENT_CARD_RESET:
1084                 if (DEV_OK(link))
1085                         pcmcia_request_configuration(link->handle, &link->conf);
1086                 break;
1087         }
1088
1089         return 0;
1090 }
1091
1092 static struct pcmcia_driver bluecard_driver = {
1093         .owner          = THIS_MODULE,
1094         .drv            = {
1095                 .name   = "bluecard_cs",
1096         },
1097         .attach         = bluecard_attach,
1098         .detach         = bluecard_detach,
1099 };
1100
1101 static int __init init_bluecard_cs(void)
1102 {
1103         return pcmcia_register_driver(&bluecard_driver);
1104 }
1105
1106
1107 static void __exit exit_bluecard_cs(void)
1108 {
1109         pcmcia_unregister_driver(&bluecard_driver);
1110         BUG_ON(dev_list != NULL);
1111 }
1112
1113 module_init(init_bluecard_cs);
1114 module_exit(exit_bluecard_cs);