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(info->rx_skb, 1) = 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 bt_cb(info->rx_skb)->pkt_type = 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 (bt_cb(info->rx_skb)->pkt_type) { 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 bt_cb(info->rx_skb)->pkt_type &= 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", bt_cb(info->rx_skb)->pkt_type); 268 kfree_skb(info->rx_skb); 269 break; 270 } 271 272 info->rx_state = RECV_WAIT_NSH; 273 info->rx_count = NSHL; 274 info->rx_skb = NULL; 275 break; 276 } 277 278 } 279 280 /* Make sure we don't stay here too long */ 281 if (boguscount++ > 32) 282 break; 283 284 } while (inb(iobase + UART_LSR) & UART_LSR_DR); 285 } 286 287 288 static irqreturn_t dtl1_interrupt(int irq, void *dev_inst) 289 { 290 struct dtl1_info *info = dev_inst; 291 unsigned int iobase; 292 unsigned char msr; 293 int boguscount = 0; 294 int iir, lsr; 295 irqreturn_t r = IRQ_NONE; 296 297 if (!info || !info->hdev) 298 /* our irq handler is shared */ 299 return IRQ_NONE; 300 301 iobase = info->p_dev->resource[0]->start; 302 303 spin_lock(&(info->lock)); 304 305 iir = inb(iobase + UART_IIR) & UART_IIR_ID; 306 while (iir) { 307 308 r = IRQ_HANDLED; 309 /* Clear interrupt */ 310 lsr = inb(iobase + UART_LSR); 311 312 switch (iir) { 313 case UART_IIR_RLSI: 314 BT_ERR("RLSI"); 315 break; 316 case UART_IIR_RDI: 317 /* Receive interrupt */ 318 dtl1_receive(info); 319 break; 320 case UART_IIR_THRI: 321 if (lsr & UART_LSR_THRE) { 322 /* Transmitter ready for data */ 323 dtl1_write_wakeup(info); 324 } 325 break; 326 default: 327 BT_ERR("Unhandled IIR=%#x", iir); 328 break; 329 } 330 331 /* Make sure we don't stay here too long */ 332 if (boguscount++ > 100) 333 break; 334 335 iir = inb(iobase + UART_IIR) & UART_IIR_ID; 336 337 } 338 339 msr = inb(iobase + UART_MSR); 340 341 if (info->ri_latch ^ (msr & UART_MSR_RI)) { 342 info->ri_latch = msr & UART_MSR_RI; 343 clear_bit(XMIT_WAITING, &(info->tx_state)); 344 dtl1_write_wakeup(info); 345 r = IRQ_HANDLED; 346 } 347 348 spin_unlock(&(info->lock)); 349 350 return r; 351 } 352 353 354 355 /* ======================== HCI interface ======================== */ 356 357 358 static int dtl1_hci_open(struct hci_dev *hdev) 359 { 360 set_bit(HCI_RUNNING, &(hdev->flags)); 361 362 return 0; 363 } 364 365 366 static int dtl1_hci_flush(struct hci_dev *hdev) 367 { 368 struct dtl1_info *info = hci_get_drvdata(hdev); 369 370 /* Drop TX queue */ 371 skb_queue_purge(&(info->txq)); 372 373 return 0; 374 } 375 376 377 static int dtl1_hci_close(struct hci_dev *hdev) 378 { 379 if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags))) 380 return 0; 381 382 dtl1_hci_flush(hdev); 383 384 return 0; 385 } 386 387 388 static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 389 { 390 struct dtl1_info *info = hci_get_drvdata(hdev); 391 struct sk_buff *s; 392 struct nsh nsh; 393 394 switch (bt_cb(skb)->pkt_type) { 395 case HCI_COMMAND_PKT: 396 hdev->stat.cmd_tx++; 397 nsh.type = 0x81; 398 break; 399 case HCI_ACLDATA_PKT: 400 hdev->stat.acl_tx++; 401 nsh.type = 0x82; 402 break; 403 case HCI_SCODATA_PKT: 404 hdev->stat.sco_tx++; 405 nsh.type = 0x83; 406 break; 407 default: 408 return -EILSEQ; 409 }; 410 411 nsh.zero = 0; 412 nsh.len = skb->len; 413 414 s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC); 415 if (!s) 416 return -ENOMEM; 417 418 skb_reserve(s, NSHL); 419 skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len); 420 if (skb->len & 0x0001) 421 *skb_put(s, 1) = 0; /* PAD */ 422 423 /* Prepend skb with Nokia frame header and queue */ 424 memcpy(skb_push(s, NSHL), &nsh, NSHL); 425 skb_queue_tail(&(info->txq), s); 426 427 dtl1_write_wakeup(info); 428 429 kfree_skb(skb); 430 431 return 0; 432 } 433 434 435 436 /* ======================== Card services HCI interaction ======================== */ 437 438 439 static int dtl1_open(struct dtl1_info *info) 440 { 441 unsigned long flags; 442 unsigned int iobase = info->p_dev->resource[0]->start; 443 struct hci_dev *hdev; 444 445 spin_lock_init(&(info->lock)); 446 447 skb_queue_head_init(&(info->txq)); 448 449 info->rx_state = RECV_WAIT_NSH; 450 info->rx_count = NSHL; 451 info->rx_skb = NULL; 452 453 set_bit(XMIT_WAITING, &(info->tx_state)); 454 455 /* Initialize HCI device */ 456 hdev = hci_alloc_dev(); 457 if (!hdev) { 458 BT_ERR("Can't allocate HCI device"); 459 return -ENOMEM; 460 } 461 462 info->hdev = hdev; 463 464 hdev->bus = HCI_PCCARD; 465 hci_set_drvdata(hdev, info); 466 SET_HCIDEV_DEV(hdev, &info->p_dev->dev); 467 468 hdev->open = dtl1_hci_open; 469 hdev->close = dtl1_hci_close; 470 hdev->flush = dtl1_hci_flush; 471 hdev->send = dtl1_hci_send_frame; 472 473 spin_lock_irqsave(&(info->lock), flags); 474 475 /* Reset UART */ 476 outb(0, iobase + UART_MCR); 477 478 /* Turn off interrupts */ 479 outb(0, iobase + UART_IER); 480 481 /* Initialize UART */ 482 outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */ 483 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR); 484 485 info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR) 486 & UART_MSR_RI; 487 488 /* Turn on interrupts */ 489 outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER); 490 491 spin_unlock_irqrestore(&(info->lock), flags); 492 493 /* Timeout before it is safe to send the first HCI packet */ 494 msleep(2000); 495 496 /* Register HCI device */ 497 if (hci_register_dev(hdev) < 0) { 498 BT_ERR("Can't register HCI device"); 499 info->hdev = NULL; 500 hci_free_dev(hdev); 501 return -ENODEV; 502 } 503 504 return 0; 505 } 506 507 508 static int dtl1_close(struct dtl1_info *info) 509 { 510 unsigned long flags; 511 unsigned int iobase = info->p_dev->resource[0]->start; 512 struct hci_dev *hdev = info->hdev; 513 514 if (!hdev) 515 return -ENODEV; 516 517 dtl1_hci_close(hdev); 518 519 spin_lock_irqsave(&(info->lock), flags); 520 521 /* Reset UART */ 522 outb(0, iobase + UART_MCR); 523 524 /* Turn off interrupts */ 525 outb(0, iobase + UART_IER); 526 527 spin_unlock_irqrestore(&(info->lock), flags); 528 529 hci_unregister_dev(hdev); 530 hci_free_dev(hdev); 531 532 return 0; 533 } 534 535 static int dtl1_probe(struct pcmcia_device *link) 536 { 537 struct dtl1_info *info; 538 539 /* Create new info device */ 540 info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL); 541 if (!info) 542 return -ENOMEM; 543 544 info->p_dev = link; 545 link->priv = info; 546 547 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; 548 549 return dtl1_config(link); 550 } 551 552 553 static void dtl1_detach(struct pcmcia_device *link) 554 { 555 struct dtl1_info *info = link->priv; 556 557 dtl1_close(info); 558 pcmcia_disable_device(link); 559 } 560 561 static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data) 562 { 563 if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8)) 564 return -ENODEV; 565 566 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; 567 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; 568 569 return pcmcia_request_io(p_dev); 570 } 571 572 static int dtl1_config(struct pcmcia_device *link) 573 { 574 struct dtl1_info *info = link->priv; 575 int ret; 576 577 /* Look for a generic full-sized window */ 578 link->resource[0]->end = 8; 579 ret = pcmcia_loop_config(link, dtl1_confcheck, NULL); 580 if (ret) 581 goto failed; 582 583 ret = pcmcia_request_irq(link, dtl1_interrupt); 584 if (ret) 585 goto failed; 586 587 ret = pcmcia_enable_device(link); 588 if (ret) 589 goto failed; 590 591 ret = dtl1_open(info); 592 if (ret) 593 goto failed; 594 595 return 0; 596 597 failed: 598 dtl1_detach(link); 599 return ret; 600 } 601 602 static const struct pcmcia_device_id dtl1_ids[] = { 603 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d), 604 PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82), 605 PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863), 606 PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3), 607 PCMCIA_DEVICE_NULL 608 }; 609 MODULE_DEVICE_TABLE(pcmcia, dtl1_ids); 610 611 static struct pcmcia_driver dtl1_driver = { 612 .owner = THIS_MODULE, 613 .name = "dtl1_cs", 614 .probe = dtl1_probe, 615 .remove = dtl1_detach, 616 .id_table = dtl1_ids, 617 }; 618 module_pcmcia_driver(dtl1_driver); 619