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/io.h> 42 43 #include <pcmcia/cistpl.h> 44 #include <pcmcia/ciscode.h> 45 #include <pcmcia/ds.h> 46 #include <pcmcia/cisreg.h> 47 48 #include <net/bluetooth/bluetooth.h> 49 #include <net/bluetooth/hci_core.h> 50 51 52 53 /* ======================== Module parameters ======================== */ 54 55 56 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 57 MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1"); 58 MODULE_LICENSE("GPL"); 59 60 61 62 /* ======================== Local structures ======================== */ 63 64 65 typedef struct dtl1_info_t { 66 struct pcmcia_device *p_dev; 67 68 struct hci_dev *hdev; 69 70 spinlock_t lock; /* For serializing operations */ 71 72 unsigned long flowmask; /* HCI flow mask */ 73 int ri_latch; 74 75 struct sk_buff_head txq; 76 unsigned long tx_state; 77 78 unsigned long rx_state; 79 unsigned long rx_count; 80 struct sk_buff *rx_skb; 81 } dtl1_info_t; 82 83 84 static int dtl1_config(struct pcmcia_device *link); 85 86 87 /* Transmit states */ 88 #define XMIT_SENDING 1 89 #define XMIT_WAKEUP 2 90 #define XMIT_WAITING 8 91 92 /* Receiver States */ 93 #define RECV_WAIT_NSH 0 94 #define RECV_WAIT_DATA 1 95 96 97 typedef struct { 98 u8 type; 99 u8 zero; 100 u16 len; 101 } __packed nsh_t; /* Nokia Specific Header */ 102 103 #define NSHL 4 /* Nokia Specific Header Length */ 104 105 106 107 /* ======================== Interrupt handling ======================== */ 108 109 110 static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len) 111 { 112 int actual = 0; 113 114 /* Tx FIFO should be empty */ 115 if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) 116 return 0; 117 118 /* Fill FIFO with current frame */ 119 while ((fifo_size-- > 0) && (actual < len)) { 120 /* Transmit next byte */ 121 outb(buf[actual], iobase + UART_TX); 122 actual++; 123 } 124 125 return actual; 126 } 127 128 129 static void dtl1_write_wakeup(dtl1_info_t *info) 130 { 131 if (!info) { 132 BT_ERR("Unknown device"); 133 return; 134 } 135 136 if (test_bit(XMIT_WAITING, &(info->tx_state))) { 137 set_bit(XMIT_WAKEUP, &(info->tx_state)); 138 return; 139 } 140 141 if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) { 142 set_bit(XMIT_WAKEUP, &(info->tx_state)); 143 return; 144 } 145 146 do { 147 unsigned int iobase = info->p_dev->resource[0]->start; 148 register struct sk_buff *skb; 149 int len; 150 151 clear_bit(XMIT_WAKEUP, &(info->tx_state)); 152 153 if (!pcmcia_dev_present(info->p_dev)) 154 return; 155 156 if (!(skb = skb_dequeue(&(info->txq)))) 157 break; 158 159 /* Send frame */ 160 len = dtl1_write(iobase, 32, skb->data, skb->len); 161 162 if (len == skb->len) { 163 set_bit(XMIT_WAITING, &(info->tx_state)); 164 kfree_skb(skb); 165 } else { 166 skb_pull(skb, len); 167 skb_queue_head(&(info->txq), skb); 168 } 169 170 info->hdev->stat.byte_tx += len; 171 172 } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); 173 174 clear_bit(XMIT_SENDING, &(info->tx_state)); 175 } 176 177 178 static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb) 179 { 180 u8 flowmask = *(u8 *)skb->data; 181 int i; 182 183 printk(KERN_INFO "Bluetooth: Nokia control data ="); 184 for (i = 0; i < skb->len; i++) { 185 printk(" %02x", skb->data[i]); 186 } 187 printk("\n"); 188 189 /* transition to active state */ 190 if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) { 191 clear_bit(XMIT_WAITING, &(info->tx_state)); 192 dtl1_write_wakeup(info); 193 } 194 195 info->flowmask = flowmask; 196 197 kfree_skb(skb); 198 } 199 200 201 static void dtl1_receive(dtl1_info_t *info) 202 { 203 unsigned int iobase; 204 nsh_t *nsh; 205 int boguscount = 0; 206 207 if (!info) { 208 BT_ERR("Unknown device"); 209 return; 210 } 211 212 iobase = info->p_dev->resource[0]->start; 213 214 do { 215 info->hdev->stat.byte_rx++; 216 217 /* Allocate packet */ 218 if (info->rx_skb == NULL) 219 if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) { 220 BT_ERR("Can't allocate mem for new packet"); 221 info->rx_state = RECV_WAIT_NSH; 222 info->rx_count = NSHL; 223 return; 224 } 225 226 *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX); 227 nsh = (nsh_t *)info->rx_skb->data; 228 229 info->rx_count--; 230 231 if (info->rx_count == 0) { 232 233 switch (info->rx_state) { 234 case RECV_WAIT_NSH: 235 info->rx_state = RECV_WAIT_DATA; 236 info->rx_count = nsh->len + (nsh->len & 0x0001); 237 break; 238 case RECV_WAIT_DATA: 239 bt_cb(info->rx_skb)->pkt_type = nsh->type; 240 241 /* remove PAD byte if it exists */ 242 if (nsh->len & 0x0001) { 243 info->rx_skb->tail--; 244 info->rx_skb->len--; 245 } 246 247 /* remove NSH */ 248 skb_pull(info->rx_skb, NSHL); 249 250 switch (bt_cb(info->rx_skb)->pkt_type) { 251 case 0x80: 252 /* control data for the Nokia Card */ 253 dtl1_control(info, info->rx_skb); 254 break; 255 case 0x82: 256 case 0x83: 257 case 0x84: 258 /* send frame to the HCI layer */ 259 info->rx_skb->dev = (void *) info->hdev; 260 bt_cb(info->rx_skb)->pkt_type &= 0x0f; 261 hci_recv_frame(info->rx_skb); 262 break; 263 default: 264 /* unknown packet */ 265 BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type); 266 kfree_skb(info->rx_skb); 267 break; 268 } 269 270 info->rx_state = RECV_WAIT_NSH; 271 info->rx_count = NSHL; 272 info->rx_skb = NULL; 273 break; 274 } 275 276 } 277 278 /* Make sure we don't stay here too long */ 279 if (boguscount++ > 32) 280 break; 281 282 } while (inb(iobase + UART_LSR) & UART_LSR_DR); 283 } 284 285 286 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst) 287 { 288 dtl1_info_t *info = dev_inst; 289 unsigned int iobase; 290 unsigned char msr; 291 int boguscount = 0; 292 int iir, lsr; 293 irqreturn_t r = IRQ_NONE; 294 295 if (!info || !info->hdev) 296 /* our irq handler is shared */ 297 return IRQ_NONE; 298 299 iobase = info->p_dev->resource[0]->start; 300 301 spin_lock(&(info->lock)); 302 303 iir = inb(iobase + UART_IIR) & UART_IIR_ID; 304 while (iir) { 305 306 r = IRQ_HANDLED; 307 /* Clear interrupt */ 308 lsr = inb(iobase + UART_LSR); 309 310 switch (iir) { 311 case UART_IIR_RLSI: 312 BT_ERR("RLSI"); 313 break; 314 case UART_IIR_RDI: 315 /* Receive interrupt */ 316 dtl1_receive(info); 317 break; 318 case UART_IIR_THRI: 319 if (lsr & UART_LSR_THRE) { 320 /* Transmitter ready for data */ 321 dtl1_write_wakeup(info); 322 } 323 break; 324 default: 325 BT_ERR("Unhandled IIR=%#x", iir); 326 break; 327 } 328 329 /* Make sure we don't stay here too long */ 330 if (boguscount++ > 100) 331 break; 332 333 iir = inb(iobase + UART_IIR) & UART_IIR_ID; 334 335 } 336 337 msr = inb(iobase + UART_MSR); 338 339 if (info->ri_latch ^ (msr & UART_MSR_RI)) { 340 info->ri_latch = msr & UART_MSR_RI; 341 clear_bit(XMIT_WAITING, &(info->tx_state)); 342 dtl1_write_wakeup(info); 343 r = IRQ_HANDLED; 344 } 345 346 spin_unlock(&(info->lock)); 347 348 return r; 349 } 350 351 352 353 /* ======================== HCI interface ======================== */ 354 355 356 static int dtl1_hci_open(struct hci_dev *hdev) 357 { 358 set_bit(HCI_RUNNING, &(hdev->flags)); 359 360 return 0; 361 } 362 363 364 static int dtl1_hci_flush(struct hci_dev *hdev) 365 { 366 dtl1_info_t *info = hci_get_drvdata(hdev); 367 368 /* Drop TX queue */ 369 skb_queue_purge(&(info->txq)); 370 371 return 0; 372 } 373 374 375 static int dtl1_hci_close(struct hci_dev *hdev) 376 { 377 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) 378 return 0; 379 380 dtl1_hci_flush(hdev); 381 382 return 0; 383 } 384 385 386 static int dtl1_hci_send_frame(struct sk_buff *skb) 387 { 388 dtl1_info_t *info; 389 struct hci_dev *hdev = (struct hci_dev *)(skb->dev); 390 struct sk_buff *s; 391 nsh_t nsh; 392 393 if (!hdev) { 394 BT_ERR("Frame for unknown HCI device (hdev=NULL)"); 395 return -ENODEV; 396 } 397 398 info = hci_get_drvdata(hdev); 399 400 switch (bt_cb(skb)->pkt_type) { 401 case HCI_COMMAND_PKT: 402 hdev->stat.cmd_tx++; 403 nsh.type = 0x81; 404 break; 405 case HCI_ACLDATA_PKT: 406 hdev->stat.acl_tx++; 407 nsh.type = 0x82; 408 break; 409 case HCI_SCODATA_PKT: 410 hdev->stat.sco_tx++; 411 nsh.type = 0x83; 412 break; 413 default: 414 return -EILSEQ; 415 }; 416 417 nsh.zero = 0; 418 nsh.len = skb->len; 419 420 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC); 421 if (!s) 422 return -ENOMEM; 423 424 skb_reserve(s, NSHL); 425 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len); 426 if (skb->len & 0x0001) 427 *skb_put(s, 1) = 0; /* PAD */ 428 429 /* Prepend skb with Nokia frame header and queue */ 430 memcpy(skb_push(s, NSHL), &nsh, NSHL); 431 skb_queue_tail(&(info->txq), s); 432 433 dtl1_write_wakeup(info); 434 435 kfree_skb(skb); 436 437 return 0; 438 } 439 440 441 static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg) 442 { 443 return -ENOIOCTLCMD; 444 } 445 446 447 448 /* ======================== Card services HCI interaction ======================== */ 449 450 451 static int dtl1_open(dtl1_info_t *info) 452 { 453 unsigned long flags; 454 unsigned int iobase = info->p_dev->resource[0]->start; 455 struct hci_dev *hdev; 456 457 spin_lock_init(&(info->lock)); 458 459 skb_queue_head_init(&(info->txq)); 460 461 info->rx_state = RECV_WAIT_NSH; 462 info->rx_count = NSHL; 463 info->rx_skb = NULL; 464 465 set_bit(XMIT_WAITING, &(info->tx_state)); 466 467 /* Initialize HCI device */ 468 hdev = hci_alloc_dev(); 469 if (!hdev) { 470 BT_ERR("Can't allocate HCI device"); 471 return -ENOMEM; 472 } 473 474 info->hdev = hdev; 475 476 hdev->bus = HCI_PCCARD; 477 hci_set_drvdata(hdev, info); 478 SET_HCIDEV_DEV(hdev, &info->p_dev->dev); 479 480 hdev->open = dtl1_hci_open; 481 hdev->close = dtl1_hci_close; 482 hdev->flush = dtl1_hci_flush; 483 hdev->send = dtl1_hci_send_frame; 484 hdev->ioctl = dtl1_hci_ioctl; 485 486 spin_lock_irqsave(&(info->lock), flags); 487 488 /* Reset UART */ 489 outb(0, iobase + UART_MCR); 490 491 /* Turn off interrupts */ 492 outb(0, iobase + UART_IER); 493 494 /* Initialize UART */ 495 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ 496 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); 497 498 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR) 499 & UART_MSR_RI; 500 501 /* Turn on interrupts */ 502 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); 503 504 spin_unlock_irqrestore(&(info->lock), flags); 505 506 /* Timeout before it is safe to send the first HCI packet */ 507 msleep(2000); 508 509 /* Register HCI device */ 510 if (hci_register_dev(hdev) < 0) { 511 BT_ERR("Can't register HCI device"); 512 info->hdev = NULL; 513 hci_free_dev(hdev); 514 return -ENODEV; 515 } 516 517 return 0; 518 } 519 520 521 static int dtl1_close(dtl1_info_t *info) 522 { 523 unsigned long flags; 524 unsigned int iobase = info->p_dev->resource[0]->start; 525 struct hci_dev *hdev = info->hdev; 526 527 if (!hdev) 528 return -ENODEV; 529 530 dtl1_hci_close(hdev); 531 532 spin_lock_irqsave(&(info->lock), flags); 533 534 /* Reset UART */ 535 outb(0, iobase + UART_MCR); 536 537 /* Turn off interrupts */ 538 outb(0, iobase + UART_IER); 539 540 spin_unlock_irqrestore(&(info->lock), flags); 541 542 hci_unregister_dev(hdev); 543 hci_free_dev(hdev); 544 545 return 0; 546 } 547 548 static int dtl1_probe(struct pcmcia_device *link) 549 { 550 dtl1_info_t *info; 551 552 /* Create new info device */ 553 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL); 554 if (!info) 555 return -ENOMEM; 556 557 info->p_dev = link; 558 link->priv = info; 559 560 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; 561 562 return dtl1_config(link); 563 } 564 565 566 static void dtl1_detach(struct pcmcia_device *link) 567 { 568 dtl1_info_t *info = link->priv; 569 570 dtl1_close(info); 571 pcmcia_disable_device(link); 572 } 573 574 static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data) 575 { 576 if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8)) 577 return -ENODEV; 578 579 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; 580 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; 581 582 return pcmcia_request_io(p_dev); 583 } 584 585 static int dtl1_config(struct pcmcia_device *link) 586 { 587 dtl1_info_t *info = link->priv; 588 int ret; 589 590 /* Look for a generic full-sized window */ 591 link->resource[0]->end = 8; 592 ret = pcmcia_loop_config(link, dtl1_confcheck, NULL); 593 if (ret) 594 goto failed; 595 596 ret = pcmcia_request_irq(link, dtl1_interrupt); 597 if (ret) 598 goto failed; 599 600 ret = pcmcia_enable_device(link); 601 if (ret) 602 goto failed; 603 604 ret = dtl1_open(info); 605 if (ret) 606 goto failed; 607 608 return 0; 609 610 failed: 611 dtl1_detach(link); 612 return ret; 613 } 614 615 static const struct pcmcia_device_id dtl1_ids[] = { 616 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d), 617 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82), 618 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863), 619 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3), 620 PCMCIA_DEVICE_NULL 621 }; 622 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids); 623 624 static struct pcmcia_driver dtl1_driver = { 625 .owner = THIS_MODULE, 626 .name = "dtl1_cs", 627 .probe = dtl1_probe, 628 .remove = dtl1_detach, 629 .id_table = dtl1_ids, 630 }; 631 module_pcmcia_driver(dtl1_driver); 632