1 /* 2 * 3 * A driver for Nokia Connectivity Card DTL-1 devices 4 * 5 * Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org> 6 * 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation; 11 * 12 * Software distributed under the License is distributed on an "AS 13 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 14 * implied. See the License for the specific language governing 15 * rights and limitations under the License. 16 * 17 * The initial developer of the original code is David A. Hinds 18 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 19 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 20 * 21 */ 22 23 #include <linux/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/delay.h> 30 #include <linux/errno.h> 31 #include <linux/ptrace.h> 32 #include <linux/ioport.h> 33 #include <linux/spinlock.h> 34 #include <linux/moduleparam.h> 35 36 #include <linux/skbuff.h> 37 #include <linux/string.h> 38 #include <linux/serial.h> 39 #include <linux/serial_reg.h> 40 #include <linux/bitops.h> 41 #include <asm/system.h> 42 #include <asm/io.h> 43 44 #include <pcmcia/cs.h> 45 #include <pcmcia/cistpl.h> 46 #include <pcmcia/ciscode.h> 47 #include <pcmcia/ds.h> 48 #include <pcmcia/cisreg.h> 49 50 #include <net/bluetooth/bluetooth.h> 51 #include <net/bluetooth/hci_core.h> 52 53 54 55 /* ======================== Module parameters ======================== */ 56 57 58 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 59 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1"); 60 MODULE_LICENSE("GPL"); 61 62 63 64 /* ======================== Local structures ======================== */ 65 66 67 typedef struct dtl1_info_t { 68 struct pcmcia_device *p_dev; 69 70 struct hci_dev *hdev; 71 72 spinlock_t lock; /* For serializing operations */ 73 74 unsigned long flowmask; /* HCI flow mask */ 75 int ri_latch; 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 } dtl1_info_t; 84 85 86 static int dtl1_config(struct pcmcia_device *link); 87 static void dtl1_release(struct pcmcia_device *link); 88 89 static void dtl1_detach(struct pcmcia_device *p_dev); 90 91 92 /* Transmit states */ 93 #define XMIT_SENDING 1 94 #define XMIT_WAKEUP 2 95 #define XMIT_WAITING 8 96 97 /* Receiver States */ 98 #define RECV_WAIT_NSH 0 99 #define RECV_WAIT_DATA 1 100 101 102 typedef struct { 103 u8 type; 104 u8 zero; 105 u16 len; 106 } __packed nsh_t; /* Nokia Specific Header */ 107 108 #define NSHL 4 /* Nokia Specific Header Length */ 109 110 111 112 /* ======================== Interrupt handling ======================== */ 113 114 115 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) 116 { 117 int actual = 0; 118 119 /* Tx FIFO should be empty */ 120 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) 121 return 0; 122 123 /* Fill FIFO with current frame */ 124 while ((fifo_size-- > 0) && (actual < len)) { 125 /* Transmit next byte */ 126 outb(buf[actual], iobase + UART_TX); 127 actual++; 128 } 129 130 return actual; 131 } 132 133 134 static void dtl1_write_wakeup(dtl1_info_t *info) 135 { 136 if (!info) { 137 BT_ERR("Unknown device"); 138 return; 139 } 140 141 if (test_bit(XMIT_WAITING, &(info->tx_state))) { 142 set_bit(XMIT_WAKEUP, &(info->tx_state)); 143 return; 144 } 145 146 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) { 147 set_bit(XMIT_WAKEUP, &(info->tx_state)); 148 return; 149 } 150 151 do { 152 register unsigned int iobase = info->p_dev->resource[0]->start; 153 register struct sk_buff *skb; 154 register int len; 155 156 clear_bit(XMIT_WAKEUP, &(info->tx_state)); 157 158 if (!pcmcia_dev_present(info->p_dev)) 159 return; 160 161 if (!(skb = skb_dequeue(&(info->txq)))) 162 break; 163 164 /* Send frame */ 165 len = dtl1_write(iobase, 32, skb->data, skb->len); 166 167 if (len == skb->len) { 168 set_bit(XMIT_WAITING, &(info->tx_state)); 169 kfree_skb(skb); 170 } else { 171 skb_pull(skb, len); 172 skb_queue_head(&(info->txq), skb); 173 } 174 175 info->hdev->stat.byte_tx += len; 176 177 } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); 178 179 clear_bit(XMIT_SENDING, &(info->tx_state)); 180 } 181 182 183 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb) 184 { 185 u8 flowmask = *(u8 *)skb->data; 186 int i; 187 188 printk(KERN_INFO "Bluetooth: Nokia control data ="); 189 for (i = 0; i < skb->len; i++) { 190 printk(" %02x", skb->data[i]); 191 } 192 printk("\n"); 193 194 /* transition to active state */ 195 if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) { 196 clear_bit(XMIT_WAITING, &(info->tx_state)); 197 dtl1_write_wakeup(info); 198 } 199 200 info->flowmask = flowmask; 201 202 kfree_skb(skb); 203 } 204 205 206 static void dtl1_receive(dtl1_info_t *info) 207 { 208 unsigned int iobase; 209 nsh_t *nsh; 210 int boguscount = 0; 211 212 if (!info) { 213 BT_ERR("Unknown device"); 214 return; 215 } 216 217 iobase = info->p_dev->resource[0]->start; 218 219 do { 220 info->hdev->stat.byte_rx++; 221 222 /* Allocate packet */ 223 if (info->rx_skb == NULL) 224 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { 225 BT_ERR("Can't allocate mem for new packet"); 226 info->rx_state = RECV_WAIT_NSH; 227 info->rx_count = NSHL; 228 return; 229 } 230 231 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); 232 nsh = (nsh_t *)info->rx_skb->data; 233 234 info->rx_count--; 235 236 if (info->rx_count == 0) { 237 238 switch (info->rx_state) { 239 case RECV_WAIT_NSH: 240 info->rx_state = RECV_WAIT_DATA; 241 info->rx_count = nsh->len + (nsh->len & 0x0001); 242 break; 243 case RECV_WAIT_DATA: 244 bt_cb(info->rx_skb)->pkt_type = nsh->type; 245 246 /* remove PAD byte if it exists */ 247 if (nsh->len & 0x0001) { 248 info->rx_skb->tail--; 249 info->rx_skb->len--; 250 } 251 252 /* remove NSH */ 253 skb_pull(info->rx_skb, NSHL); 254 255 switch (bt_cb(info->rx_skb)->pkt_type) { 256 case 0x80: 257 /* control data for the Nokia Card */ 258 dtl1_control(info, info->rx_skb); 259 break; 260 case 0x82: 261 case 0x83: 262 case 0x84: 263 /* send frame to the HCI layer */ 264 info->rx_skb->dev = (void *) info->hdev; 265 bt_cb(info->rx_skb)->pkt_type &= 0x0f; 266 hci_recv_frame(info->rx_skb); 267 break; 268 default: 269 /* unknown packet */ 270 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); 271 kfree_skb(info->rx_skb); 272 break; 273 } 274 275 info->rx_state = RECV_WAIT_NSH; 276 info->rx_count = NSHL; 277 info->rx_skb = NULL; 278 break; 279 } 280 281 } 282 283 /* Make sure we don't stay here too long */ 284 if (boguscount++ > 32) 285 break; 286 287 } while (inb(iobase + UART_LSR) & UART_LSR_DR); 288 } 289 290 291 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst) 292 { 293 dtl1_info_t *info = dev_inst; 294 unsigned int iobase; 295 unsigned char msr; 296 int boguscount = 0; 297 int iir, lsr; 298 irqreturn_t r = IRQ_NONE; 299 300 if (!info || !info->hdev) 301 /* our irq handler is shared */ 302 return IRQ_NONE; 303 304 iobase = info->p_dev->resource[0]->start; 305 306 spin_lock(&(info->lock)); 307 308 iir = inb(iobase + UART_IIR) & UART_IIR_ID; 309 while (iir) { 310 311 r = IRQ_HANDLED; 312 /* Clear interrupt */ 313 lsr = inb(iobase + UART_LSR); 314 315 switch (iir) { 316 case UART_IIR_RLSI: 317 BT_ERR("RLSI"); 318 break; 319 case UART_IIR_RDI: 320 /* Receive interrupt */ 321 dtl1_receive(info); 322 break; 323 case UART_IIR_THRI: 324 if (lsr & UART_LSR_THRE) { 325 /* Transmitter ready for data */ 326 dtl1_write_wakeup(info); 327 } 328 break; 329 default: 330 BT_ERR("Unhandled IIR=%#x", iir); 331 break; 332 } 333 334 /* Make sure we don't stay here too long */ 335 if (boguscount++ > 100) 336 break; 337 338 iir = inb(iobase + UART_IIR) & UART_IIR_ID; 339 340 } 341 342 msr = inb(iobase + UART_MSR); 343 344 if (info->ri_latch ^ (msr & UART_MSR_RI)) { 345 info->ri_latch = msr & UART_MSR_RI; 346 clear_bit(XMIT_WAITING, &(info->tx_state)); 347 dtl1_write_wakeup(info); 348 r = IRQ_HANDLED; 349 } 350 351 spin_unlock(&(info->lock)); 352 353 return r; 354 } 355 356 357 358 /* ======================== HCI interface ======================== */ 359 360 361 static int dtl1_hci_open(struct hci_dev *hdev) 362 { 363 set_bit(HCI_RUNNING, &(hdev->flags)); 364 365 return 0; 366 } 367 368 369 static int dtl1_hci_flush(struct hci_dev *hdev) 370 { 371 dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data); 372 373 /* Drop TX queue */ 374 skb_queue_purge(&(info->txq)); 375 376 return 0; 377 } 378 379 380 static int dtl1_hci_close(struct hci_dev *hdev) 381 { 382 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) 383 return 0; 384 385 dtl1_hci_flush(hdev); 386 387 return 0; 388 } 389 390 391 static int dtl1_hci_send_frame(struct sk_buff *skb) 392 { 393 dtl1_info_t *info; 394 struct hci_dev *hdev = (struct hci_dev *)(skb->dev); 395 struct sk_buff *s; 396 nsh_t nsh; 397 398 if (!hdev) { 399 BT_ERR("Frame for unknown HCI device (hdev=NULL)"); 400 return -ENODEV; 401 } 402 403 info = (dtl1_info_t *)(hdev->driver_data); 404 405 switch (bt_cb(skb)->pkt_type) { 406 case HCI_COMMAND_PKT: 407 hdev->stat.cmd_tx++; 408 nsh.type = 0x81; 409 break; 410 case HCI_ACLDATA_PKT: 411 hdev->stat.acl_tx++; 412 nsh.type = 0x82; 413 break; 414 case HCI_SCODATA_PKT: 415 hdev->stat.sco_tx++; 416 nsh.type = 0x83; 417 break; 418 default: 419 return -EILSEQ; 420 }; 421 422 nsh.zero = 0; 423 nsh.len = skb->len; 424 425 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC); 426 if (!s) 427 return -ENOMEM; 428 429 skb_reserve(s, NSHL); 430 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len); 431 if (skb->len & 0x0001) 432 *skb_put(s, 1) = 0; /* PAD */ 433 434 /* Prepend skb with Nokia frame header and queue */ 435 memcpy(skb_push(s, NSHL), &nsh, NSHL); 436 skb_queue_tail(&(info->txq), s); 437 438 dtl1_write_wakeup(info); 439 440 kfree_skb(skb); 441 442 return 0; 443 } 444 445 446 static void dtl1_hci_destruct(struct hci_dev *hdev) 447 { 448 } 449 450 451 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) 452 { 453 return -ENOIOCTLCMD; 454 } 455 456 457 458 /* ======================== Card services HCI interaction ======================== */ 459 460 461 static int dtl1_open(dtl1_info_t *info) 462 { 463 unsigned long flags; 464 unsigned int iobase = info->p_dev->resource[0]->start; 465 struct hci_dev *hdev; 466 467 spin_lock_init(&(info->lock)); 468 469 skb_queue_head_init(&(info->txq)); 470 471 info->rx_state = RECV_WAIT_NSH; 472 info->rx_count = NSHL; 473 info->rx_skb = NULL; 474 475 set_bit(XMIT_WAITING, &(info->tx_state)); 476 477 /* Initialize HCI device */ 478 hdev = hci_alloc_dev(); 479 if (!hdev) { 480 BT_ERR("Can't allocate HCI device"); 481 return -ENOMEM; 482 } 483 484 info->hdev = hdev; 485 486 hdev->bus = HCI_PCCARD; 487 hdev->driver_data = info; 488 SET_HCIDEV_DEV(hdev, &info->p_dev->dev); 489 490 hdev->open = dtl1_hci_open; 491 hdev->close = dtl1_hci_close; 492 hdev->flush = dtl1_hci_flush; 493 hdev->send = dtl1_hci_send_frame; 494 hdev->destruct = dtl1_hci_destruct; 495 hdev->ioctl = dtl1_hci_ioctl; 496 497 hdev->owner = THIS_MODULE; 498 499 spin_lock_irqsave(&(info->lock), flags); 500 501 /* Reset UART */ 502 outb(0, iobase + UART_MCR); 503 504 /* Turn off interrupts */ 505 outb(0, iobase + UART_IER); 506 507 /* Initialize UART */ 508 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ 509 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); 510 511 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR) 512 & UART_MSR_RI; 513 514 /* Turn on interrupts */ 515 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); 516 517 spin_unlock_irqrestore(&(info->lock), flags); 518 519 /* Timeout before it is safe to send the first HCI packet */ 520 msleep(2000); 521 522 /* Register HCI device */ 523 if (hci_register_dev(hdev) < 0) { 524 BT_ERR("Can't register HCI device"); 525 info->hdev = NULL; 526 hci_free_dev(hdev); 527 return -ENODEV; 528 } 529 530 return 0; 531 } 532 533 534 static int dtl1_close(dtl1_info_t *info) 535 { 536 unsigned long flags; 537 unsigned int iobase = info->p_dev->resource[0]->start; 538 struct hci_dev *hdev = info->hdev; 539 540 if (!hdev) 541 return -ENODEV; 542 543 dtl1_hci_close(hdev); 544 545 spin_lock_irqsave(&(info->lock), flags); 546 547 /* Reset UART */ 548 outb(0, iobase + UART_MCR); 549 550 /* Turn off interrupts */ 551 outb(0, iobase + UART_IER); 552 553 spin_unlock_irqrestore(&(info->lock), flags); 554 555 if (hci_unregister_dev(hdev) < 0) 556 BT_ERR("Can't unregister HCI device %s", hdev->name); 557 558 hci_free_dev(hdev); 559 560 return 0; 561 } 562 563 static int dtl1_probe(struct pcmcia_device *link) 564 { 565 dtl1_info_t *info; 566 567 /* Create new info device */ 568 info = kzalloc(sizeof(*info), GFP_KERNEL); 569 if (!info) 570 return -ENOMEM; 571 572 info->p_dev = link; 573 link->priv = info; 574 575 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; 576 link->resource[0]->end = 8; 577 578 link->conf.Attributes = CONF_ENABLE_IRQ; 579 link->conf.IntType = INT_MEMORY_AND_IO; 580 581 return dtl1_config(link); 582 } 583 584 585 static void dtl1_detach(struct pcmcia_device *link) 586 { 587 dtl1_info_t *info = link->priv; 588 589 dtl1_release(link); 590 591 kfree(info); 592 } 593 594 static int dtl1_confcheck(struct pcmcia_device *p_dev, 595 cistpl_cftable_entry_t *cf, 596 cistpl_cftable_entry_t *dflt, 597 unsigned int vcc, 598 void *priv_data) 599 { 600 if ((cf->io.nwin != 1) || (cf->io.win[0].len <= 8)) 601 return -ENODEV; 602 603 p_dev->resource[0]->start = cf->io.win[0].base; 604 p_dev->resource[0]->end = cf->io.win[0].len; /*yo */ 605 p_dev->io_lines = cf->io.flags & CISTPL_IO_LINES_MASK; 606 return pcmcia_request_io(p_dev); 607 } 608 609 static int dtl1_config(struct pcmcia_device *link) 610 { 611 dtl1_info_t *info = link->priv; 612 int i; 613 614 /* Look for a generic full-sized window */ 615 link->resource[0]->end = 8; 616 if (pcmcia_loop_config(link, dtl1_confcheck, NULL) < 0) 617 goto failed; 618 619 i = pcmcia_request_irq(link, dtl1_interrupt); 620 if (i != 0) 621 goto failed; 622 623 i = pcmcia_request_configuration(link, &link->conf); 624 if (i != 0) 625 goto failed; 626 627 if (dtl1_open(info) != 0) 628 goto failed; 629 630 return 0; 631 632 failed: 633 dtl1_release(link); 634 return -ENODEV; 635 } 636 637 638 static void dtl1_release(struct pcmcia_device *link) 639 { 640 dtl1_info_t *info = link->priv; 641 642 dtl1_close(info); 643 644 pcmcia_disable_device(link); 645 } 646 647 648 static struct pcmcia_device_id dtl1_ids[] = { 649 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d), 650 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82), 651 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863), 652 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3), 653 PCMCIA_DEVICE_NULL 654 }; 655 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids); 656 657 static struct pcmcia_driver dtl1_driver = { 658 .owner = THIS_MODULE, 659 .drv = { 660 .name = "dtl1_cs", 661 }, 662 .probe = dtl1_probe, 663 .remove = dtl1_detach, 664 .id_table = dtl1_ids, 665 }; 666 667 static int __init init_dtl1_cs(void) 668 { 669 return pcmcia_register_driver(&dtl1_driver); 670 } 671 672 673 static void __exit exit_dtl1_cs(void) 674 { 675 pcmcia_unregister_driver(&dtl1_driver); 676 } 677 678 module_init(init_dtl1_cs); 679 module_exit(exit_dtl1_cs); 680