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 struct dtl1_info { 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 }; 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 struct nsh { 98 u8 type; 99 u8 zero; 100 u16 len; 101 } __packed; /* 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(struct dtl1_info *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 skb = skb_dequeue(&(info->txq)); 157 if (!skb) 158 break; 159 160 /* Send frame */ 161 len = dtl1_write(iobase, 32, skb->data, skb->len); 162 163 if (len == skb->len) { 164 set_bit(XMIT_WAITING, &(info->tx_state)); 165 kfree_skb(skb); 166 } else { 167 skb_pull(skb, len); 168 skb_queue_head(&(info->txq), skb); 169 } 170 171 info->hdev->stat.byte_tx += len; 172 173 } while (test_bit(XMIT_WAKEUP, &(info->tx_state))); 174 175 clear_bit(XMIT_SENDING, &(info->tx_state)); 176 } 177 178 179 static void dtl1_control(struct dtl1_info *info, struct sk_buff *skb) 180 { 181 u8 flowmask = *(u8 *)skb->data; 182 int i; 183 184 printk(KERN_INFO "Bluetooth: Nokia control data ="); 185 for (i = 0; i < skb->len; i++) 186 printk(" %02x", skb->data[i]); 187 188 printk("\n"); 189 190 /* transition to active state */ 191 if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) { 192 clear_bit(XMIT_WAITING, &(info->tx_state)); 193 dtl1_write_wakeup(info); 194 } 195 196 info->flowmask = flowmask; 197 198 kfree_skb(skb); 199 } 200 201 202 static void dtl1_receive(struct dtl1_info *info) 203 { 204 unsigned int iobase; 205 struct nsh *nsh; 206 int boguscount = 0; 207 208 if (!info) { 209 BT_ERR("Unknown device"); 210 return; 211 } 212 213 iobase = info->p_dev->resource[0]->start; 214 215 do { 216 info->hdev->stat.byte_rx++; 217 218 /* Allocate packet */ 219 if (info->rx_skb == NULL) { 220 info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC); 221 if (!info->rx_skb) { 222 BT_ERR("Can't allocate mem for new packet"); 223 info->rx_state = RECV_WAIT_NSH; 224 info->rx_count = NSHL; 225 return; 226 } 227 } 228 229 skb_put_u8(info->rx_skb, inb(iobase + UART_RX)); 230 nsh = (struct nsh *)info->rx_skb->data; 231 232 info->rx_count--; 233 234 if (info->rx_count == 0) { 235 236 switch (info->rx_state) { 237 case RECV_WAIT_NSH: 238 info->rx_state = RECV_WAIT_DATA; 239 info->rx_count = nsh->len + (nsh->len & 0x0001); 240 break; 241 case RECV_WAIT_DATA: 242 hci_skb_pkt_type(info->rx_skb) = nsh->type; 243 244 /* remove PAD byte if it exists */ 245 if (nsh->len & 0x0001) { 246 info->rx_skb->tail--; 247 info->rx_skb->len--; 248 } 249 250 /* remove NSH */ 251 skb_pull(info->rx_skb, NSHL); 252 253 switch (hci_skb_pkt_type(info->rx_skb)) { 254 case 0x80: 255 /* control data for the Nokia Card */ 256 dtl1_control(info, info->rx_skb); 257 break; 258 case 0x82: 259 case 0x83: 260 case 0x84: 261 /* send frame to the HCI layer */ 262 hci_skb_pkt_type(info->rx_skb) &= 0x0f; 263 hci_recv_frame(info->hdev, info->rx_skb); 264 break; 265 default: 266 /* unknown packet */ 267 BT_ERR("Unknown HCI packet with type 0x%02x received", 268 hci_skb_pkt_type(info->rx_skb)); 269 kfree_skb(info->rx_skb); 270 break; 271 } 272 273 info->rx_state = RECV_WAIT_NSH; 274 info->rx_count = NSHL; 275 info->rx_skb = NULL; 276 break; 277 } 278 279 } 280 281 /* Make sure we don't stay here too long */ 282 if (boguscount++ > 32) 283 break; 284 285 } while (inb(iobase + UART_LSR) & UART_LSR_DR); 286 } 287 288 289 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst) 290 { 291 struct dtl1_info *info = dev_inst; 292 unsigned int iobase; 293 unsigned char msr; 294 int boguscount = 0; 295 int iir, lsr; 296 irqreturn_t r = IRQ_NONE; 297 298 if (!info || !info->hdev) 299 /* our irq handler is shared */ 300 return IRQ_NONE; 301 302 iobase = info->p_dev->resource[0]->start; 303 304 spin_lock(&(info->lock)); 305 306 iir = inb(iobase + UART_IIR) & UART_IIR_ID; 307 while (iir) { 308 309 r = IRQ_HANDLED; 310 /* Clear interrupt */ 311 lsr = inb(iobase + UART_LSR); 312 313 switch (iir) { 314 case UART_IIR_RLSI: 315 BT_ERR("RLSI"); 316 break; 317 case UART_IIR_RDI: 318 /* Receive interrupt */ 319 dtl1_receive(info); 320 break; 321 case UART_IIR_THRI: 322 if (lsr & UART_LSR_THRE) { 323 /* Transmitter ready for data */ 324 dtl1_write_wakeup(info); 325 } 326 break; 327 default: 328 BT_ERR("Unhandled IIR=%#x", iir); 329 break; 330 } 331 332 /* Make sure we don't stay here too long */ 333 if (boguscount++ > 100) 334 break; 335 336 iir = inb(iobase + UART_IIR) & UART_IIR_ID; 337 338 } 339 340 msr = inb(iobase + UART_MSR); 341 342 if (info->ri_latch ^ (msr & UART_MSR_RI)) { 343 info->ri_latch = msr & UART_MSR_RI; 344 clear_bit(XMIT_WAITING, &(info->tx_state)); 345 dtl1_write_wakeup(info); 346 r = IRQ_HANDLED; 347 } 348 349 spin_unlock(&(info->lock)); 350 351 return r; 352 } 353 354 355 356 /* ======================== HCI interface ======================== */ 357 358 359 static int dtl1_hci_open(struct hci_dev *hdev) 360 { 361 return 0; 362 } 363 364 365 static int dtl1_hci_flush(struct hci_dev *hdev) 366 { 367 struct dtl1_info *info = hci_get_drvdata(hdev); 368 369 /* Drop TX queue */ 370 skb_queue_purge(&(info->txq)); 371 372 return 0; 373 } 374 375 376 static int dtl1_hci_close(struct hci_dev *hdev) 377 { 378 dtl1_hci_flush(hdev); 379 380 return 0; 381 } 382 383 384 static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 385 { 386 struct dtl1_info *info = hci_get_drvdata(hdev); 387 struct sk_buff *s; 388 struct nsh nsh; 389 390 switch (hci_skb_pkt_type(skb)) { 391 case HCI_COMMAND_PKT: 392 hdev->stat.cmd_tx++; 393 nsh.type = 0x81; 394 break; 395 case HCI_ACLDATA_PKT: 396 hdev->stat.acl_tx++; 397 nsh.type = 0x82; 398 break; 399 case HCI_SCODATA_PKT: 400 hdev->stat.sco_tx++; 401 nsh.type = 0x83; 402 break; 403 default: 404 return -EILSEQ; 405 } 406 407 nsh.zero = 0; 408 nsh.len = skb->len; 409 410 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC); 411 if (!s) 412 return -ENOMEM; 413 414 skb_reserve(s, NSHL); 415 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len); 416 if (skb->len & 0x0001) 417 skb_put_u8(s, 0); /* PAD */ 418 419 /* Prepend skb with Nokia frame header and queue */ 420 memcpy(skb_push(s, NSHL), &nsh, NSHL); 421 skb_queue_tail(&(info->txq), s); 422 423 dtl1_write_wakeup(info); 424 425 kfree_skb(skb); 426 427 return 0; 428 } 429 430 431 432 /* ======================== Card services HCI interaction ======================== */ 433 434 435 static int dtl1_open(struct dtl1_info *info) 436 { 437 unsigned long flags; 438 unsigned int iobase = info->p_dev->resource[0]->start; 439 struct hci_dev *hdev; 440 441 spin_lock_init(&(info->lock)); 442 443 skb_queue_head_init(&(info->txq)); 444 445 info->rx_state = RECV_WAIT_NSH; 446 info->rx_count = NSHL; 447 info->rx_skb = NULL; 448 449 set_bit(XMIT_WAITING, &(info->tx_state)); 450 451 /* Initialize HCI device */ 452 hdev = hci_alloc_dev(); 453 if (!hdev) { 454 BT_ERR("Can't allocate HCI device"); 455 return -ENOMEM; 456 } 457 458 info->hdev = hdev; 459 460 hdev->bus = HCI_PCCARD; 461 hci_set_drvdata(hdev, info); 462 SET_HCIDEV_DEV(hdev, &info->p_dev->dev); 463 464 hdev->open = dtl1_hci_open; 465 hdev->close = dtl1_hci_close; 466 hdev->flush = dtl1_hci_flush; 467 hdev->send = dtl1_hci_send_frame; 468 469 spin_lock_irqsave(&(info->lock), flags); 470 471 /* Reset UART */ 472 outb(0, iobase + UART_MCR); 473 474 /* Turn off interrupts */ 475 outb(0, iobase + UART_IER); 476 477 /* Initialize UART */ 478 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ 479 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); 480 481 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR) 482 & UART_MSR_RI; 483 484 /* Turn on interrupts */ 485 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); 486 487 spin_unlock_irqrestore(&(info->lock), flags); 488 489 /* Timeout before it is safe to send the first HCI packet */ 490 msleep(2000); 491 492 /* Register HCI device */ 493 if (hci_register_dev(hdev) < 0) { 494 BT_ERR("Can't register HCI device"); 495 info->hdev = NULL; 496 hci_free_dev(hdev); 497 return -ENODEV; 498 } 499 500 return 0; 501 } 502 503 504 static int dtl1_close(struct dtl1_info *info) 505 { 506 unsigned long flags; 507 unsigned int iobase = info->p_dev->resource[0]->start; 508 struct hci_dev *hdev = info->hdev; 509 510 if (!hdev) 511 return -ENODEV; 512 513 dtl1_hci_close(hdev); 514 515 spin_lock_irqsave(&(info->lock), flags); 516 517 /* Reset UART */ 518 outb(0, iobase + UART_MCR); 519 520 /* Turn off interrupts */ 521 outb(0, iobase + UART_IER); 522 523 spin_unlock_irqrestore(&(info->lock), flags); 524 525 hci_unregister_dev(hdev); 526 hci_free_dev(hdev); 527 528 return 0; 529 } 530 531 static int dtl1_probe(struct pcmcia_device *link) 532 { 533 struct dtl1_info *info; 534 535 /* Create new info device */ 536 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL); 537 if (!info) 538 return -ENOMEM; 539 540 info->p_dev = link; 541 link->priv = info; 542 543 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; 544 545 return dtl1_config(link); 546 } 547 548 549 static void dtl1_detach(struct pcmcia_device *link) 550 { 551 struct dtl1_info *info = link->priv; 552 553 dtl1_close(info); 554 pcmcia_disable_device(link); 555 } 556 557 static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data) 558 { 559 if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8)) 560 return -ENODEV; 561 562 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; 563 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; 564 565 return pcmcia_request_io(p_dev); 566 } 567 568 static int dtl1_config(struct pcmcia_device *link) 569 { 570 struct dtl1_info *info = link->priv; 571 int ret; 572 573 /* Look for a generic full-sized window */ 574 link->resource[0]->end = 8; 575 ret = pcmcia_loop_config(link, dtl1_confcheck, NULL); 576 if (ret) 577 goto failed; 578 579 ret = pcmcia_request_irq(link, dtl1_interrupt); 580 if (ret) 581 goto failed; 582 583 ret = pcmcia_enable_device(link); 584 if (ret) 585 goto failed; 586 587 ret = dtl1_open(info); 588 if (ret) 589 goto failed; 590 591 return 0; 592 593 failed: 594 dtl1_detach(link); 595 return ret; 596 } 597 598 static const struct pcmcia_device_id dtl1_ids[] = { 599 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d), 600 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82), 601 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863), 602 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3), 603 PCMCIA_DEVICE_NULL 604 }; 605 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids); 606 607 static struct pcmcia_driver dtl1_driver = { 608 .owner = THIS_MODULE, 609 .name = "dtl1_cs", 610 .probe = dtl1_probe, 611 .remove = dtl1_detach, 612 .id_table = dtl1_ids, 613 }; 614 module_pcmcia_driver(dtl1_driver); 615