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/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/delay.h> 31#include <linux/errno.h> 32#include <linux/ptrace.h> 33#include <linux/ioport.h> 34#include <linux/spinlock.h> 35#include <linux/moduleparam.h> 36 37#include <linux/skbuff.h> 38#include <linux/string.h> 39#include <linux/serial.h> 40#include <linux/serial_reg.h> 41#include <linux/bitops.h> 42#include <asm/system.h> 43#include <asm/io.h> 44 45#include <linux/device.h> 46#include <linux/firmware.h> 47 48#include <pcmcia/cs.h> 49#include <pcmcia/cistpl.h> 50#include <pcmcia/ciscode.h> 51#include <pcmcia/ds.h> 52#include <pcmcia/cisreg.h> 53 54#include <net/bluetooth/bluetooth.h> 55#include <net/bluetooth/hci_core.h> 56 57 58 59/* ======================== Module parameters ======================== */ 60 61 62MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 63MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card"); 64MODULE_LICENSE("GPL"); 65MODULE_FIRMWARE("BT3CPCC.bin"); 66 67 68 69/* ======================== Local structures ======================== */ 70 71 72typedef struct bt3c_info_t { 73 struct pcmcia_device *p_dev; 74 75 struct hci_dev *hdev; 76 77 spinlock_t lock; /* For serializing operations */ 78 79 struct sk_buff_head txq; 80 unsigned long tx_state; 81 82 unsigned long rx_state; 83 unsigned long rx_count; 84 struct sk_buff *rx_skb; 85} bt3c_info_t; 86 87 88static int bt3c_config(struct pcmcia_device *link); 89static void bt3c_release(struct pcmcia_device *link); 90 91static void bt3c_detach(struct pcmcia_device *p_dev); 92 93 94/* Transmit states */ 95#define XMIT_SENDING 1 96#define XMIT_WAKEUP 2 97#define XMIT_WAITING 8 98 99/* Receiver states */ 100#define RECV_WAIT_PACKET_TYPE 0 101#define RECV_WAIT_EVENT_HEADER 1 102#define RECV_WAIT_ACL_HEADER 2 103#define RECV_WAIT_SCO_HEADER 3 104#define RECV_WAIT_DATA 4 105 106 107 108/* ======================== Special I/O functions ======================== */ 109 110 111#define DATA_L 0 112#define DATA_H 1 113#define ADDR_L 2 114#define ADDR_H 3 115#define CONTROL 4 116 117 118static inline void bt3c_address(unsigned int iobase, unsigned short addr) 119{ 120 outb(addr & 0xff, iobase + ADDR_L); 121 outb((addr >> 8) & 0xff, iobase + ADDR_H); 122} 123 124 125static inline void bt3c_put(unsigned int iobase, unsigned short value) 126{ 127 outb(value & 0xff, iobase + DATA_L); 128 outb((value >> 8) & 0xff, iobase + DATA_H); 129} 130 131 132static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value) 133{ 134 bt3c_address(iobase, addr); 135 bt3c_put(iobase, value); 136} 137 138 139static inline unsigned short bt3c_get(unsigned int iobase) 140{ 141 unsigned short value = inb(iobase + DATA_L); 142 143 value |= inb(iobase + DATA_H) << 8; 144 145 return value; 146} 147 148 149static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr) 150{ 151 bt3c_address(iobase, addr); 152 153 return bt3c_get(iobase); 154} 155 156 157 158/* ======================== Interrupt handling ======================== */ 159 160 161static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) 162{ 163 int actual = 0; 164 165 bt3c_address(iobase, 0x7080); 166 167 /* Fill FIFO with current frame */ 168 while (actual < len) { 169 /* Transmit next byte */ 170 bt3c_put(iobase, buf[actual]); 171 actual++; 172 } 173 174 bt3c_io_write(iobase, 0x7005, actual); 175 176 return actual; 177} 178 179 180static void bt3c_write_wakeup(bt3c_info_t *info) 181{ 182 if (!info) { 183 BT_ERR("Unknown device"); 184 return; 185 } 186 187 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) 188 return; 189 190 do { 191 register unsigned int iobase = info->p_dev->resource[0]->start; 192 register struct sk_buff *skb; 193 register int len; 194 195 if (!pcmcia_dev_present(info->p_dev)) 196 break; 197 198 199 if (!(skb = skb_dequeue(&(info->txq)))) { 200 clear_bit(XMIT_SENDING, &(info->tx_state)); 201 break; 202 } 203 204 /* Send frame */ 205 len = bt3c_write(iobase, 256, skb->data, skb->len); 206 207 if (len != skb->len) { 208 BT_ERR("Very strange"); 209 } 210 211 kfree_skb(skb); 212 213 info->hdev->stat.byte_tx += len; 214 215 } while (0); 216} 217 218 219static void bt3c_receive(bt3c_info_t *info) 220{ 221 unsigned int iobase; 222 int size = 0, avail; 223 224 if (!info) { 225 BT_ERR("Unknown device"); 226 return; 227 } 228 229 iobase = info->p_dev->resource[0]->start; 230 231 avail = bt3c_read(iobase, 0x7006); 232 //printk("bt3c_cs: receiving %d bytes\n", avail); 233 234 bt3c_address(iobase, 0x7480); 235 while (size < avail) { 236 size++; 237 info->hdev->stat.byte_rx++; 238 239 /* Allocate packet */ 240 if (info->rx_skb == NULL) { 241 info->rx_state = RECV_WAIT_PACKET_TYPE; 242 info->rx_count = 0; 243 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { 244 BT_ERR("Can't allocate mem for new packet"); 245 return; 246 } 247 } 248 249 250 if (info->rx_state == RECV_WAIT_PACKET_TYPE) { 251 252 info->rx_skb->dev = (void *) info->hdev; 253 bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L); 254 inb(iobase + DATA_H); 255 //printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type); 256 257 switch (bt_cb(info->rx_skb)->pkt_type) { 258 259 case HCI_EVENT_PKT: 260 info->rx_state = RECV_WAIT_EVENT_HEADER; 261 info->rx_count = HCI_EVENT_HDR_SIZE; 262 break; 263 264 case HCI_ACLDATA_PKT: 265 info->rx_state = RECV_WAIT_ACL_HEADER; 266 info->rx_count = HCI_ACL_HDR_SIZE; 267 break; 268 269 case HCI_SCODATA_PKT: 270 info->rx_state = RECV_WAIT_SCO_HEADER; 271 info->rx_count = HCI_SCO_HDR_SIZE; 272 break; 273 274 default: 275 /* Unknown packet */ 276 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); 277 info->hdev->stat.err_rx++; 278 clear_bit(HCI_RUNNING, &(info->hdev->flags)); 279 280 kfree_skb(info->rx_skb); 281 info->rx_skb = NULL; 282 break; 283 284 } 285 286 } else { 287 288 __u8 x = inb(iobase + DATA_L); 289 290 *skb_put(info->rx_skb, 1) = x; 291 inb(iobase + DATA_H); 292 info->rx_count--; 293 294 if (info->rx_count == 0) { 295 296 int dlen; 297 struct hci_event_hdr *eh; 298 struct hci_acl_hdr *ah; 299 struct hci_sco_hdr *sh; 300 301 switch (info->rx_state) { 302 303 case RECV_WAIT_EVENT_HEADER: 304 eh = hci_event_hdr(info->rx_skb); 305 info->rx_state = RECV_WAIT_DATA; 306 info->rx_count = eh->plen; 307 break; 308 309 case RECV_WAIT_ACL_HEADER: 310 ah = hci_acl_hdr(info->rx_skb); 311 dlen = __le16_to_cpu(ah->dlen); 312 info->rx_state = RECV_WAIT_DATA; 313 info->rx_count = dlen; 314 break; 315 316 case RECV_WAIT_SCO_HEADER: 317 sh = hci_sco_hdr(info->rx_skb); 318 info->rx_state = RECV_WAIT_DATA; 319 info->rx_count = sh->dlen; 320 break; 321 322 case RECV_WAIT_DATA: 323 hci_recv_frame(info->rx_skb); 324 info->rx_skb = NULL; 325 break; 326 327 } 328 329 } 330 331 } 332 333 } 334 335 bt3c_io_write(iobase, 0x7006, 0x0000); 336} 337 338 339static irqreturn_t bt3c_interrupt(int irq, void *dev_inst) 340{ 341 bt3c_info_t *info = dev_inst; 342 unsigned int iobase; 343 int iir; 344 irqreturn_t r = IRQ_NONE; 345 346 if (!info || !info->hdev) 347 /* our irq handler is shared */ 348 return IRQ_NONE; 349 350 iobase = info->p_dev->resource[0]->start; 351 352 spin_lock(&(info->lock)); 353 354 iir = inb(iobase + CONTROL); 355 if (iir & 0x80) { 356 int stat = bt3c_read(iobase, 0x7001); 357 358 if ((stat & 0xff) == 0x7f) { 359 BT_ERR("Very strange (stat=0x%04x)", stat); 360 } else if ((stat & 0xff) != 0xff) { 361 if (stat & 0x0020) { 362 int status = bt3c_read(iobase, 0x7002) & 0x10; 363 BT_INFO("%s: Antenna %s", info->hdev->name, 364 status ? "out" : "in"); 365 } 366 if (stat & 0x0001) 367 bt3c_receive(info); 368 if (stat & 0x0002) { 369 //BT_ERR("Ack (stat=0x%04x)", stat); 370 clear_bit(XMIT_SENDING, &(info->tx_state)); 371 bt3c_write_wakeup(info); 372 } 373 374 bt3c_io_write(iobase, 0x7001, 0x0000); 375 376 outb(iir, iobase + CONTROL); 377 } 378 r = IRQ_HANDLED; 379 } 380 381 spin_unlock(&(info->lock)); 382 383 return r; 384} 385 386 387 388/* ======================== HCI interface ======================== */ 389 390 391static int bt3c_hci_flush(struct hci_dev *hdev) 392{ 393 bt3c_info_t *info = (bt3c_info_t *)(hdev->driver_data); 394 395 /* Drop TX queue */ 396 skb_queue_purge(&(info->txq)); 397 398 return 0; 399} 400 401 402static int bt3c_hci_open(struct hci_dev *hdev) 403{ 404 set_bit(HCI_RUNNING, &(hdev->flags)); 405 406 return 0; 407} 408 409 410static int bt3c_hci_close(struct hci_dev *hdev) 411{ 412 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) 413 return 0; 414 415 bt3c_hci_flush(hdev); 416 417 return 0; 418} 419 420 421static int bt3c_hci_send_frame(struct sk_buff *skb) 422{ 423 bt3c_info_t *info; 424 struct hci_dev *hdev = (struct hci_dev *)(skb->dev); 425 unsigned long flags; 426 427 if (!hdev) { 428 BT_ERR("Frame for unknown HCI device (hdev=NULL)"); 429 return -ENODEV; 430 } 431 432 info = (bt3c_info_t *) (hdev->driver_data); 433 434 switch (bt_cb(skb)->pkt_type) { 435 case HCI_COMMAND_PKT: 436 hdev->stat.cmd_tx++; 437 break; 438 case HCI_ACLDATA_PKT: 439 hdev->stat.acl_tx++; 440 break; 441 case HCI_SCODATA_PKT: 442 hdev->stat.sco_tx++; 443 break; 444 }; 445 446 /* Prepend skb with frame type */ 447 memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); 448 skb_queue_tail(&(info->txq), skb); 449 450 spin_lock_irqsave(&(info->lock), flags); 451 452 bt3c_write_wakeup(info); 453 454 spin_unlock_irqrestore(&(info->lock), flags); 455 456 return 0; 457} 458 459 460static void bt3c_hci_destruct(struct hci_dev *hdev) 461{ 462} 463 464 465static int bt3c_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) 466{ 467 return -ENOIOCTLCMD; 468} 469 470 471 472/* ======================== Card services HCI interaction ======================== */ 473 474 475static int bt3c_load_firmware(bt3c_info_t *info, const unsigned char *firmware, 476 int count) 477{ 478 char *ptr = (char *) firmware; 479 char b[9]; 480 unsigned int iobase, size, addr, fcs, tmp; 481 int i, err = 0; 482 483 iobase = info->p_dev->resource[0]->start; 484 485 /* Reset */ 486 bt3c_io_write(iobase, 0x8040, 0x0404); 487 bt3c_io_write(iobase, 0x8040, 0x0400); 488 489 udelay(1); 490 491 bt3c_io_write(iobase, 0x8040, 0x0404); 492 493 udelay(17); 494 495 /* Load */ 496 while (count) { 497 if (ptr[0] != 'S') { 498 BT_ERR("Bad address in firmware"); 499 err = -EFAULT; 500 goto error; 501 } 502 503 memset(b, 0, sizeof(b)); 504 memcpy(b, ptr + 2, 2); 505 size = simple_strtoul(b, NULL, 16); 506 507 memset(b, 0, sizeof(b)); 508 memcpy(b, ptr + 4, 8); 509 addr = simple_strtoul(b, NULL, 16); 510 511 memset(b, 0, sizeof(b)); 512 memcpy(b, ptr + (size * 2) + 2, 2); 513 fcs = simple_strtoul(b, NULL, 16); 514 515 memset(b, 0, sizeof(b)); 516 for (tmp = 0, i = 0; i < size; i++) { 517 memcpy(b, ptr + (i * 2) + 2, 2); 518 tmp += simple_strtol(b, NULL, 16); 519 } 520 521 if (((tmp + fcs) & 0xff) != 0xff) { 522 BT_ERR("Checksum error in firmware"); 523 err = -EILSEQ; 524 goto error; 525 } 526 527 if (ptr[1] == '3') { 528 bt3c_address(iobase, addr); 529 530 memset(b, 0, sizeof(b)); 531 for (i = 0; i < (size - 4) / 2; i++) { 532 memcpy(b, ptr + (i * 4) + 12, 4); 533 tmp = simple_strtoul(b, NULL, 16); 534 bt3c_put(iobase, tmp); 535 } 536 } 537 538 ptr += (size * 2) + 6; 539 count -= (size * 2) + 6; 540 } 541 542 udelay(17); 543 544 /* Boot */ 545 bt3c_address(iobase, 0x3000); 546 outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL); 547 548error: 549 udelay(17); 550 551 /* Clear */ 552 bt3c_io_write(iobase, 0x7006, 0x0000); 553 bt3c_io_write(iobase, 0x7005, 0x0000); 554 bt3c_io_write(iobase, 0x7001, 0x0000); 555 556 return err; 557} 558 559 560static int bt3c_open(bt3c_info_t *info) 561{ 562 const struct firmware *firmware; 563 struct hci_dev *hdev; 564 int err; 565 566 spin_lock_init(&(info->lock)); 567 568 skb_queue_head_init(&(info->txq)); 569 570 info->rx_state = RECV_WAIT_PACKET_TYPE; 571 info->rx_count = 0; 572 info->rx_skb = NULL; 573 574 /* Initialize HCI device */ 575 hdev = hci_alloc_dev(); 576 if (!hdev) { 577 BT_ERR("Can't allocate HCI device"); 578 return -ENOMEM; 579 } 580 581 info->hdev = hdev; 582 583 hdev->bus = HCI_PCCARD; 584 hdev->driver_data = info; 585 SET_HCIDEV_DEV(hdev, &info->p_dev->dev); 586 587 hdev->open = bt3c_hci_open; 588 hdev->close = bt3c_hci_close; 589 hdev->flush = bt3c_hci_flush; 590 hdev->send = bt3c_hci_send_frame; 591 hdev->destruct = bt3c_hci_destruct; 592 hdev->ioctl = bt3c_hci_ioctl; 593 594 hdev->owner = THIS_MODULE; 595 596 /* Load firmware */ 597 err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev); 598 if (err < 0) { 599 BT_ERR("Firmware request failed"); 600 goto error; 601 } 602 603 err = bt3c_load_firmware(info, firmware->data, firmware->size); 604 605 release_firmware(firmware); 606 607 if (err < 0) { 608 BT_ERR("Firmware loading failed"); 609 goto error; 610 } 611 612 /* Timeout before it is safe to send the first HCI packet */ 613 msleep(1000); 614 615 /* Register HCI device */ 616 err = hci_register_dev(hdev); 617 if (err < 0) { 618 BT_ERR("Can't register HCI device"); 619 goto error; 620 } 621 622 return 0; 623 624error: 625 info->hdev = NULL; 626 hci_free_dev(hdev); 627 return err; 628} 629 630 631static int bt3c_close(bt3c_info_t *info) 632{ 633 struct hci_dev *hdev = info->hdev; 634 635 if (!hdev) 636 return -ENODEV; 637 638 bt3c_hci_close(hdev); 639 640 if (hci_unregister_dev(hdev) < 0) 641 BT_ERR("Can't unregister HCI device %s", hdev->name); 642 643 hci_free_dev(hdev); 644 645 return 0; 646} 647 648static int bt3c_probe(struct pcmcia_device *link) 649{ 650 bt3c_info_t *info; 651 652 /* Create new info device */ 653 info = kzalloc(sizeof(*info), GFP_KERNEL); 654 if (!info) 655 return -ENOMEM; 656 657 info->p_dev = link; 658 link->priv = info; 659 660 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; 661 link->resource[0]->end = 8; 662 663 link->conf.Attributes = CONF_ENABLE_IRQ; 664 link->conf.IntType = INT_MEMORY_AND_IO; 665 666 return bt3c_config(link); 667} 668 669 670static void bt3c_detach(struct pcmcia_device *link) 671{ 672 bt3c_info_t *info = link->priv; 673 674 bt3c_release(link); 675 kfree(info); 676} 677 678static int bt3c_check_config(struct pcmcia_device *p_dev, 679 cistpl_cftable_entry_t *cf, 680 cistpl_cftable_entry_t *dflt, 681 unsigned int vcc, 682 void *priv_data) 683{ 684 unsigned long try = (unsigned long) priv_data; 685 686 p_dev->io_lines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK; 687 688 if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM)) 689 p_dev->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000; 690 if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && 691 (cf->io.win[0].base != 0)) { 692 p_dev->resource[0]->start = cf->io.win[0].base; 693 if (!pcmcia_request_io(p_dev)) 694 return 0; 695 } 696 return -ENODEV; 697} 698 699static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev, 700 cistpl_cftable_entry_t *cf, 701 cistpl_cftable_entry_t *dflt, 702 unsigned int vcc, 703 void *priv_data) 704{ 705 static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; 706 int j; 707 708 if ((cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) { 709 for (j = 0; j < 5; j++) { 710 p_dev->resource[0]->start = base[j]; 711 p_dev->io_lines = base[j] ? 16 : 3; 712 if (!pcmcia_request_io(p_dev)) 713 return 0; 714 } 715 } 716 return -ENODEV; 717} 718 719static int bt3c_config(struct pcmcia_device *link) 720{ 721 bt3c_info_t *info = link->priv; 722 int i; 723 unsigned long try; 724 725 /* First pass: look for a config entry that looks normal. 726 Two tries: without IO aliases, then with aliases */ 727 for (try = 0; try < 2; try++) 728 if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try)) 729 goto found_port; 730 731 /* Second pass: try to find an entry that isn't picky about 732 its base address, then try to grab any standard serial port 733 address, and finally try to get any free port. */ 734 if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL)) 735 goto found_port; 736 737 BT_ERR("No usable port range found"); 738 goto failed; 739 740found_port: 741 i = pcmcia_request_irq(link, &bt3c_interrupt); 742 if (i != 0) 743 goto failed; 744 745 i = pcmcia_request_configuration(link, &link->conf); 746 if (i != 0) 747 goto failed; 748 749 if (bt3c_open(info) != 0) 750 goto failed; 751 752 return 0; 753 754failed: 755 bt3c_release(link); 756 return -ENODEV; 757} 758 759 760static void bt3c_release(struct pcmcia_device *link) 761{ 762 bt3c_info_t *info = link->priv; 763 764 bt3c_close(info); 765 766 pcmcia_disable_device(link); 767} 768 769 770static struct pcmcia_device_id bt3c_ids[] = { 771 PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02), 772 PCMCIA_DEVICE_NULL 773}; 774MODULE_DEVICE_TABLE(pcmcia, bt3c_ids); 775 776static struct pcmcia_driver bt3c_driver = { 777 .owner = THIS_MODULE, 778 .drv = { 779 .name = "bt3c_cs", 780 }, 781 .probe = bt3c_probe, 782 .remove = bt3c_detach, 783 .id_table = bt3c_ids, 784}; 785 786static int __init init_bt3c_cs(void) 787{ 788 return pcmcia_register_driver(&bt3c_driver); 789} 790 791 792static void __exit exit_bt3c_cs(void) 793{ 794 pcmcia_unregister_driver(&bt3c_driver); 795} 796 797module_init(init_bt3c_cs); 798module_exit(exit_bt3c_cs); 799