dtl1_cs.c 12.7 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
/*
 *
 *  A driver for Nokia Connectivity Card DTL-1 devices
 *
 *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation;
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing
 *  rights and limitations under the License.
 *
 *  The initial developer of the original code is David A. Hinds
 *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 *
 */

#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>

#include <linux/skbuff.h>
#include <linux/string.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <linux/bitops.h>
#include <asm/io.h>

#include <pcmcia/cistpl.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>



/* ======================== Module parameters ======================== */


MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
MODULE_LICENSE("GPL");



/* ======================== Local structures ======================== */


typedef struct dtl1_info_t {
66
	struct pcmcia_device *p_dev;
Linus Torvalds's avatar
Linus Torvalds committed
67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

	struct hci_dev *hdev;

	spinlock_t lock;		/* For serializing operations */

	unsigned long flowmask;		/* HCI flow mask */
	int ri_latch;

	struct sk_buff_head txq;
	unsigned long tx_state;

	unsigned long rx_state;
	unsigned long rx_count;
	struct sk_buff *rx_skb;
} dtl1_info_t;


84
static int dtl1_config(struct pcmcia_device *link);
Linus Torvalds's avatar
Linus Torvalds committed
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100


/* Transmit states  */
#define XMIT_SENDING  1
#define XMIT_WAKEUP   2
#define XMIT_WAITING  8

/* Receiver States */
#define RECV_WAIT_NSH   0
#define RECV_WAIT_DATA  1


typedef struct {
	u8 type;
	u8 zero;
	u16 len;
101
} __packed nsh_t;	/* Nokia Specific Header */
Linus Torvalds's avatar
Linus Torvalds committed
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146

#define NSHL  4				/* Nokia Specific Header Length */



/* ======================== Interrupt handling ======================== */


static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
{
	int actual = 0;

	/* Tx FIFO should be empty */
	if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
		return 0;

	/* Fill FIFO with current frame */
	while ((fifo_size-- > 0) && (actual < len)) {
		/* Transmit next byte */
		outb(buf[actual], iobase + UART_TX);
		actual++;
	}

	return actual;
}


static void dtl1_write_wakeup(dtl1_info_t *info)
{
	if (!info) {
		BT_ERR("Unknown device");
		return;
	}

	if (test_bit(XMIT_WAITING, &(info->tx_state))) {
		set_bit(XMIT_WAKEUP, &(info->tx_state));
		return;
	}

	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
		set_bit(XMIT_WAKEUP, &(info->tx_state));
		return;
	}

	do {
147
		unsigned int iobase = info->p_dev->resource[0]->start;
Linus Torvalds's avatar
Linus Torvalds committed
148
		register struct sk_buff *skb;
149
		int len;
Linus Torvalds's avatar
Linus Torvalds committed
150 151 152

		clear_bit(XMIT_WAKEUP, &(info->tx_state));

153
		if (!pcmcia_dev_present(info->p_dev))
Linus Torvalds's avatar
Linus Torvalds committed
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
			return;

		if (!(skb = skb_dequeue(&(info->txq))))
			break;

		/* Send frame */
		len = dtl1_write(iobase, 32, skb->data, skb->len);

		if (len == skb->len) {
			set_bit(XMIT_WAITING, &(info->tx_state));
			kfree_skb(skb);
		} else {
			skb_pull(skb, len);
			skb_queue_head(&(info->txq), skb);
		}

		info->hdev->stat.byte_tx += len;

	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));

	clear_bit(XMIT_SENDING, &(info->tx_state));
}


static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
{
	u8 flowmask = *(u8 *)skb->data;
	int i;

	printk(KERN_INFO "Bluetooth: Nokia control data =");
	for (i = 0; i < skb->len; i++) {
		printk(" %02x", skb->data[i]);
	}
	printk("\n");

	/* transition to active state */
	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
		clear_bit(XMIT_WAITING, &(info->tx_state));
		dtl1_write_wakeup(info);
	}

	info->flowmask = flowmask;

	kfree_skb(skb);
}


static void dtl1_receive(dtl1_info_t *info)
{
	unsigned int iobase;
	nsh_t *nsh;
	int boguscount = 0;

	if (!info) {
		BT_ERR("Unknown device");
		return;
	}

212
	iobase = info->p_dev->resource[0]->start;
Linus Torvalds's avatar
Linus Torvalds committed
213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238

	do {
		info->hdev->stat.byte_rx++;

		/* Allocate packet */
		if (info->rx_skb == NULL)
			if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
				BT_ERR("Can't allocate mem for new packet");
				info->rx_state = RECV_WAIT_NSH;
				info->rx_count = NSHL;
				return;
			}

		*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
		nsh = (nsh_t *)info->rx_skb->data;

		info->rx_count--;

		if (info->rx_count == 0) {

			switch (info->rx_state) {
			case RECV_WAIT_NSH:
				info->rx_state = RECV_WAIT_DATA;
				info->rx_count = nsh->len + (nsh->len & 0x0001);
				break;
			case RECV_WAIT_DATA:
239
				bt_cb(info->rx_skb)->pkt_type = nsh->type;
Linus Torvalds's avatar
Linus Torvalds committed
240 241 242 243 244 245 246 247 248 249

				/* remove PAD byte if it exists */
				if (nsh->len & 0x0001) {
					info->rx_skb->tail--;
					info->rx_skb->len--;
				}

				/* remove NSH */
				skb_pull(info->rx_skb, NSHL);

250
				switch (bt_cb(info->rx_skb)->pkt_type) {
Linus Torvalds's avatar
Linus Torvalds committed
251 252 253 254 255 256 257 258 259
				case 0x80:
					/* control data for the Nokia Card */
					dtl1_control(info, info->rx_skb);
					break;
				case 0x82:
				case 0x83:
				case 0x84:
					/* send frame to the HCI layer */
					info->rx_skb->dev = (void *) info->hdev;
260
					bt_cb(info->rx_skb)->pkt_type &= 0x0f;
Linus Torvalds's avatar
Linus Torvalds committed
261 262 263 264
					hci_recv_frame(info->rx_skb);
					break;
				default:
					/* unknown packet */
265
					BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
Linus Torvalds's avatar
Linus Torvalds committed
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285
					kfree_skb(info->rx_skb);
					break;
				}

				info->rx_state = RECV_WAIT_NSH;
				info->rx_count = NSHL;
				info->rx_skb = NULL;
				break;
			}

		}

		/* Make sure we don't stay here too long */
		if (boguscount++ > 32)
			break;

	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
}


286
static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
Linus Torvalds's avatar
Linus Torvalds committed
287 288 289 290 291 292
{
	dtl1_info_t *info = dev_inst;
	unsigned int iobase;
	unsigned char msr;
	int boguscount = 0;
	int iir, lsr;
293
	irqreturn_t r = IRQ_NONE;
Linus Torvalds's avatar
Linus Torvalds committed
294

295 296 297
	if (!info || !info->hdev)
		/* our irq handler is shared */
		return IRQ_NONE;
Linus Torvalds's avatar
Linus Torvalds committed
298

299
	iobase = info->p_dev->resource[0]->start;
Linus Torvalds's avatar
Linus Torvalds committed
300 301 302 303 304 305

	spin_lock(&(info->lock));

	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
	while (iir) {

306
		r = IRQ_HANDLED;
Linus Torvalds's avatar
Linus Torvalds committed
307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342
		/* Clear interrupt */
		lsr = inb(iobase + UART_LSR);

		switch (iir) {
		case UART_IIR_RLSI:
			BT_ERR("RLSI");
			break;
		case UART_IIR_RDI:
			/* Receive interrupt */
			dtl1_receive(info);
			break;
		case UART_IIR_THRI:
			if (lsr & UART_LSR_THRE) {
				/* Transmitter ready for data */
				dtl1_write_wakeup(info);
			}
			break;
		default:
			BT_ERR("Unhandled IIR=%#x", iir);
			break;
		}

		/* Make sure we don't stay here too long */
		if (boguscount++ > 100)
			break;

		iir = inb(iobase + UART_IIR) & UART_IIR_ID;

	}

	msr = inb(iobase + UART_MSR);

	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
		info->ri_latch = msr & UART_MSR_RI;
		clear_bit(XMIT_WAITING, &(info->tx_state));
		dtl1_write_wakeup(info);
343
		r = IRQ_HANDLED;
Linus Torvalds's avatar
Linus Torvalds committed
344 345 346 347
	}

	spin_unlock(&(info->lock));

348
	return r;
Linus Torvalds's avatar
Linus Torvalds committed
349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365
}



/* ======================== HCI interface ======================== */


static int dtl1_hci_open(struct hci_dev *hdev)
{
	set_bit(HCI_RUNNING, &(hdev->flags));

	return 0;
}


static int dtl1_hci_flush(struct hci_dev *hdev)
{
366
	dtl1_info_t *info = hci_get_drvdata(hdev);
Linus Torvalds's avatar
Linus Torvalds committed
367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397

	/* Drop TX queue */
	skb_queue_purge(&(info->txq));

	return 0;
}


static int dtl1_hci_close(struct hci_dev *hdev)
{
	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
		return 0;

	dtl1_hci_flush(hdev);

	return 0;
}


static int dtl1_hci_send_frame(struct sk_buff *skb)
{
	dtl1_info_t *info;
	struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
	struct sk_buff *s;
	nsh_t nsh;

	if (!hdev) {
		BT_ERR("Frame for unknown HCI device (hdev=NULL)");
		return -ENODEV;
	}

398
	info = hci_get_drvdata(hdev);
Linus Torvalds's avatar
Linus Torvalds committed
399

400
	switch (bt_cb(skb)->pkt_type) {
Linus Torvalds's avatar
Linus Torvalds committed
401 402 403 404 405 406 407 408 409 410 411 412
	case HCI_COMMAND_PKT:
		hdev->stat.cmd_tx++;
		nsh.type = 0x81;
		break;
	case HCI_ACLDATA_PKT:
		hdev->stat.acl_tx++;
		nsh.type = 0x82;
		break;
	case HCI_SCODATA_PKT:
		hdev->stat.sco_tx++;
		nsh.type = 0x83;
		break;
413 414
	default:
		return -EILSEQ;
Linus Torvalds's avatar
Linus Torvalds committed
415 416 417 418 419 420
	};

	nsh.zero = 0;
	nsh.len = skb->len;

	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
421 422 423
	if (!s)
		return -ENOMEM;

Linus Torvalds's avatar
Linus Torvalds committed
424
	skb_reserve(s, NSHL);
425
	skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
Linus Torvalds's avatar
Linus Torvalds committed
426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453
	if (skb->len & 0x0001)
		*skb_put(s, 1) = 0;	/* PAD */

	/* Prepend skb with Nokia frame header and queue */
	memcpy(skb_push(s, NSHL), &nsh, NSHL);
	skb_queue_tail(&(info->txq), s);

	dtl1_write_wakeup(info);

	kfree_skb(skb);

	return 0;
}


static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd,  unsigned long arg)
{
	return -ENOIOCTLCMD;
}



/* ======================== Card services HCI interaction ======================== */


static int dtl1_open(dtl1_info_t *info)
{
	unsigned long flags;
454
	unsigned int iobase = info->p_dev->resource[0]->start;
Linus Torvalds's avatar
Linus Torvalds committed
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475
	struct hci_dev *hdev;

	spin_lock_init(&(info->lock));

	skb_queue_head_init(&(info->txq));

	info->rx_state = RECV_WAIT_NSH;
	info->rx_count = NSHL;
	info->rx_skb = NULL;

	set_bit(XMIT_WAITING, &(info->tx_state));

	/* Initialize HCI device */
	hdev = hci_alloc_dev();
	if (!hdev) {
		BT_ERR("Can't allocate HCI device");
		return -ENOMEM;
	}

	info->hdev = hdev;

476
	hdev->bus = HCI_PCCARD;
477
	hci_set_drvdata(hdev, info);
478
	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
Linus Torvalds's avatar
Linus Torvalds committed
479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497

	hdev->open     = dtl1_hci_open;
	hdev->close    = dtl1_hci_close;
	hdev->flush    = dtl1_hci_flush;
	hdev->send     = dtl1_hci_send_frame;
	hdev->ioctl    = dtl1_hci_ioctl;

	spin_lock_irqsave(&(info->lock), flags);

	/* Reset UART */
	outb(0, iobase + UART_MCR);

	/* Turn off interrupts */
	outb(0, iobase + UART_IER);

	/* Initialize UART */
	outb(UART_LCR_WLEN8, iobase + UART_LCR);	/* Reset DLAB */
	outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);

498 499
	info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
				& UART_MSR_RI;
Linus Torvalds's avatar
Linus Torvalds committed
500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523

	/* Turn on interrupts */
	outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);

	spin_unlock_irqrestore(&(info->lock), flags);

	/* Timeout before it is safe to send the first HCI packet */
	msleep(2000);

	/* Register HCI device */
	if (hci_register_dev(hdev) < 0) {
		BT_ERR("Can't register HCI device");
		info->hdev = NULL;
		hci_free_dev(hdev);
		return -ENODEV;
	}

	return 0;
}


static int dtl1_close(dtl1_info_t *info)
{
	unsigned long flags;
524
	unsigned int iobase = info->p_dev->resource[0]->start;
Linus Torvalds's avatar
Linus Torvalds committed
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
	struct hci_dev *hdev = info->hdev;

	if (!hdev)
		return -ENODEV;

	dtl1_hci_close(hdev);

	spin_lock_irqsave(&(info->lock), flags);

	/* Reset UART */
	outb(0, iobase + UART_MCR);

	/* Turn off interrupts */
	outb(0, iobase + UART_IER);

	spin_unlock_irqrestore(&(info->lock), flags);

542
	hci_unregister_dev(hdev);
Linus Torvalds's avatar
Linus Torvalds committed
543 544 545 546 547
	hci_free_dev(hdev);

	return 0;
}

548
static int dtl1_probe(struct pcmcia_device *link)
Linus Torvalds's avatar
Linus Torvalds committed
549 550 551 552
{
	dtl1_info_t *info;

	/* Create new info device */
553
	info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
554
	if (!info)
555
		return -ENOMEM;
Linus Torvalds's avatar
Linus Torvalds committed
556

557
	info->p_dev = link;
Linus Torvalds's avatar
Linus Torvalds committed
558 559
	link->priv = info;

560
	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
Linus Torvalds's avatar
Linus Torvalds committed
561

562
	return dtl1_config(link);
Linus Torvalds's avatar
Linus Torvalds committed
563 564 565
}


566
static void dtl1_detach(struct pcmcia_device *link)
Linus Torvalds's avatar
Linus Torvalds committed
567 568 569
{
	dtl1_info_t *info = link->priv;

570 571
	dtl1_close(info);
	pcmcia_disable_device(link);
Linus Torvalds's avatar
Linus Torvalds committed
572 573
}

574
static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
Linus Torvalds's avatar
Linus Torvalds committed
575
{
576
	if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
577 578
		return -ENODEV;

579 580 581
	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
	p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;

582
	return pcmcia_request_io(p_dev);
Linus Torvalds's avatar
Linus Torvalds committed
583 584
}

585
static int dtl1_config(struct pcmcia_device *link)
Linus Torvalds's avatar
Linus Torvalds committed
586 587
{
	dtl1_info_t *info = link->priv;
588
	int ret;
Linus Torvalds's avatar
Linus Torvalds committed
589 590

	/* Look for a generic full-sized window */
591
	link->resource[0]->end = 8;
592 593
	ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
	if (ret)
Linus Torvalds's avatar
Linus Torvalds committed
594 595
		goto failed;

596 597
	ret = pcmcia_request_irq(link, dtl1_interrupt);
	if (ret)
598
		goto failed;
Linus Torvalds's avatar
Linus Torvalds committed
599

600 601
	ret = pcmcia_enable_device(link);
	if (ret)
Linus Torvalds's avatar
Linus Torvalds committed
602 603
		goto failed;

604 605
	ret = dtl1_open(info);
	if (ret)
Linus Torvalds's avatar
Linus Torvalds committed
606 607
		goto failed;

608
	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
609 610

failed:
611
	dtl1_detach(link);
612
	return ret;
Linus Torvalds's avatar
Linus Torvalds committed
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),
620 621 622 623
	PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);

Linus Torvalds's avatar
Linus Torvalds committed
624 625
static struct pcmcia_driver dtl1_driver = {
	.owner		= THIS_MODULE,
626
	.name		= "dtl1_cs",
627
	.probe		= dtl1_probe,
628
	.remove		= dtl1_detach,
629
	.id_table	= dtl1_ids,
Linus Torvalds's avatar
Linus Torvalds committed
630
};
631
module_pcmcia_driver(dtl1_driver);