aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wan/wanxl.c
blob: b2031dfc4bb1076426d9c0d45ebc1472eda449b3 (plain)
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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
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
147
148
149
150
151
152
153
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
212
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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
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
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
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
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
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
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
/*
 * wanXL serial card driver for Linux
 * host part
 *
 * Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License
 * as published by the Free Software Foundation.
 *
 * Status:
 *   - Only DTE (external clock) support with NRZ and NRZI encodings
 *   - wanXL100 will require minor driver modifications, no access to hw
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/hdlc.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <asm/io.h>

#include "wanxl.h"

static const char* version = "wanXL serial card driver version: 0.48";

#define PLX_CTL_RESET   0x40000000 /* adapter reset */

#undef DEBUG_PKT
#undef DEBUG_PCI

/* MAILBOX #1 - PUTS COMMANDS */
#define MBX1_CMD_ABORTJ 0x85000000 /* Abort and Jump */
#ifdef __LITTLE_ENDIAN
#define MBX1_CMD_BSWAP  0x8C000001 /* little-endian Byte Swap Mode */
#else
#define MBX1_CMD_BSWAP  0x8C000000 /* big-endian Byte Swap Mode */
#endif

/* MAILBOX #2 - DRAM SIZE */
#define MBX2_MEMSZ_MASK 0xFFFF0000 /* PUTS Memory Size Register mask */


typedef struct {
	struct net_device *dev;
	struct card_t *card;
	spinlock_t lock;	/* for wanxl_xmit */
        int node;		/* physical port #0 - 3 */
	unsigned int clock_type;
	int tx_in, tx_out;
	struct sk_buff *tx_skbs[TX_BUFFERS];
}port_t;


typedef struct {
	desc_t rx_descs[RX_QUEUE_LENGTH];
	port_status_t port_status[4];
}card_status_t;


typedef struct card_t {
	int n_ports;		/* 1, 2 or 4 ports */
	u8 irq;

	u8 __iomem *plx;	/* PLX PCI9060 virtual base address */
	struct pci_dev *pdev;	/* for pci_name(pdev) */
	int rx_in;
	struct sk_buff *rx_skbs[RX_QUEUE_LENGTH];
	card_status_t *status;	/* shared between host and card */
	dma_addr_t status_address;
	port_t ports[0];	/* 1 - 4 port_t structures follow */
}card_t;



static inline port_t* dev_to_port(struct net_device *dev)
{
        return (port_t *)dev_to_hdlc(dev)->priv;
}


static inline port_status_t* get_status(port_t *port)
{
	return &port->card->status->port_status[port->node];
}


#ifdef DEBUG_PCI
static inline dma_addr_t pci_map_single_debug(struct pci_dev *pdev, void *ptr,
					      size_t size, int direction)
{
	dma_addr_t addr = pci_map_single(pdev, ptr, size, direction);
	if (addr + size > 0x100000000LL)
		printk(KERN_CRIT "wanXL %s: pci_map_single() returned memory"
		       " at 0x%LX!\n", pci_name(pdev),
		       (unsigned long long)addr);
	return addr;
}

#undef pci_map_single
#define pci_map_single pci_map_single_debug
#endif


/* Cable and/or personality module change interrupt service */
static inline void wanxl_cable_intr(port_t *port)
{
	u32 value = get_status(port)->cable;
	int valid = 1;
	const char *cable, *pm, *dte = "", *dsr = "", *dcd = "";

	switch(value & 0x7) {
	case STATUS_CABLE_V35: cable = "V.35"; break;
	case STATUS_CABLE_X21: cable = "X.21"; break;
	case STATUS_CABLE_V24: cable = "V.24"; break;
	case STATUS_CABLE_EIA530: cable = "EIA530"; break;
	case STATUS_CABLE_NONE: cable = "no"; break;
	default: cable = "invalid";
	}

	switch((value >> STATUS_CABLE_PM_SHIFT) & 0x7) {
	case STATUS_CABLE_V35: pm = "V.35"; break;
	case STATUS_CABLE_X21: pm = "X.21"; break;
	case STATUS_CABLE_V24: pm = "V.24"; break;
	case STATUS_CABLE_EIA530: pm = "EIA530"; break;
	case STATUS_CABLE_NONE: pm = "no personality"; valid = 0; break;
	default: pm = "invalid personality"; valid = 0;
	}

	if (valid) {
		if ((value & 7) == ((value >> STATUS_CABLE_PM_SHIFT) & 7)) {
			dsr = (value & STATUS_CABLE_DSR) ? ", DSR ON" :
				", DSR off";
			dcd = (value & STATUS_CABLE_DCD) ? ", carrier ON" :
				", carrier off";
		}
		dte = (value & STATUS_CABLE_DCE) ? " DCE" : " DTE";
	}
	printk(KERN_INFO "%s: %s%s module, %s cable%s%s\n",
	       port->dev->name, pm, dte, cable, dsr, dcd);

	if (value & STATUS_CABLE_DCD)
		netif_carrier_on(port->dev);
	else
		netif_carrier_off(port->dev);
}



/* Transmit complete interrupt service */
static inline void wanxl_tx_intr(port_t *port)
{
	struct net_device *dev = port->dev;
	struct net_device_stats *stats = hdlc_stats(dev);
	while (1) {
                desc_t *desc = &get_status(port)->tx_descs[port->tx_in];
		struct sk_buff *skb = port->tx_skbs[port->tx_in];

		switch (desc->stat) {
		case PACKET_FULL:
		case PACKET_EMPTY:
			netif_wake_queue(dev);
			return;

		case PACKET_UNDERRUN:
			stats->tx_errors++;
			stats->tx_fifo_errors++;
			break;

		default:
			stats->tx_packets++;
			stats->tx_bytes += skb->len;
		}
                desc->stat = PACKET_EMPTY; /* Free descriptor */
		pci_unmap_single(port->card->pdev, desc->address, skb->len,
				 PCI_DMA_TODEVICE);
		dev_kfree_skb_irq(skb);
                port->tx_in = (port->tx_in + 1) % TX_BUFFERS;
        }
}



/* Receive complete interrupt service */
static inline void wanxl_rx_intr(card_t *card)
{
	desc_t *desc;
	while (desc = &card->status->rx_descs[card->rx_in],
	       desc->stat != PACKET_EMPTY) {
		if ((desc->stat & PACKET_PORT_MASK) > card->n_ports)
			printk(KERN_CRIT "wanXL %s: received packet for"
			       " nonexistent port\n", pci_name(card->pdev));
		else {
			struct sk_buff *skb = card->rx_skbs[card->rx_in];
			port_t *port = &card->ports[desc->stat &
						    PACKET_PORT_MASK];
			struct net_device *dev = port->dev;
			struct net_device_stats *stats = hdlc_stats(dev);

			if (!skb)
				stats->rx_dropped++;
			else {
				pci_unmap_single(card->pdev, desc->address,
						 BUFFER_LENGTH,
						 PCI_DMA_FROMDEVICE);
				skb_put(skb, desc->length);

#ifdef DEBUG_PKT
				printk(KERN_DEBUG "%s RX(%i):", dev->name,
				       skb->len);
				debug_frame(skb);
#endif
				stats->rx_packets++;
				stats->rx_bytes += skb->len;
				dev->last_rx = jiffies;
				skb->protocol = hdlc_type_trans(skb, dev);
				netif_rx(skb);
				skb = NULL;
			}

			if (!skb) {
				skb = dev_alloc_skb(BUFFER_LENGTH);
				desc->address = skb ?
					pci_map_single(card->pdev, skb->data,
						       BUFFER_LENGTH,
						       PCI_DMA_FROMDEVICE) : 0;
				card->rx_skbs[card->rx_in] = skb;
			}
		}
		desc->stat = PACKET_EMPTY; /* Free descriptor */
		card->rx_in = (card->rx_in + 1) % RX_QUEUE_LENGTH;
	}
}



static irqreturn_t wanxl_intr(int irq, void* dev_id, struct pt_regs *regs)
{
        card_t *card = dev_id;
        int i;
        u32 stat;
        int handled = 0;


        while((stat = readl(card->plx + PLX_DOORBELL_FROM_CARD)) != 0) {
                handled = 1;
		writel(stat, card->plx + PLX_DOORBELL_FROM_CARD);

                for (i = 0; i < card->n_ports; i++) {
			if (stat & (1 << (DOORBELL_FROM_CARD_TX_0 + i)))
				wanxl_tx_intr(&card->ports[i]);
			if (stat & (1 << (DOORBELL_FROM_CARD_CABLE_0 + i)))
				wanxl_cable_intr(&card->ports[i]);
		}
		if (stat & (1 << DOORBELL_FROM_CARD_RX))
			wanxl_rx_intr(card);
        }

        return IRQ_RETVAL(handled);
}



static int wanxl_xmit(struct sk_buff *skb, struct net_device *dev)
{
        port_t *port = dev_to_port(dev);
	desc_t *desc;

        spin_lock(&port->lock);

	desc = &get_status(port)->tx_descs[port->tx_out];
        if (desc->stat != PACKET_EMPTY) {
                /* should never happen - previous xmit should stop queue */
#ifdef DEBUG_PKT
                printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
#endif
		netif_stop_queue(dev);
		spin_unlock_irq(&port->lock);
		return 1;       /* request packet to be queued */
	}

#ifdef DEBUG_PKT
	printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
	debug_frame(skb);
#endif

	port->tx_skbs[port->tx_out] = skb;
	desc->address = pci_map_single(port->card->pdev, skb->data, skb->len,
				       PCI_DMA_TODEVICE);
	desc->length = skb->len;
	desc->stat = PACKET_FULL;
	writel(1 << (DOORBELL_TO_CARD_TX_0 + port->node),
	       port->card->plx + PLX_DOORBELL_TO_CARD);
	dev->trans_start = jiffies;

	port->tx_out = (port->tx_out + 1) % TX_BUFFERS;

	if (get_status(port)->tx_descs[port->tx_out].stat != PACKET_EMPTY) {
		netif_stop_queue(dev);
#ifdef DEBUG_PKT
		printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
#endif
	}

	spin_unlock(&port->lock);
	return 0;
}



static int wanxl_attach(struct net_device *dev, unsigned short encoding,
			unsigned short parity)
{
	port_t *port = dev_to_port(dev);

	if (encoding != ENCODING_NRZ &&
	    encoding != ENCODING_NRZI)
		return -EINVAL;

	if (parity != PARITY_NONE &&
	    parity != PARITY_CRC32_PR1_CCITT &&
	    parity != PARITY_CRC16_PR1_CCITT &&
	    parity != PARITY_CRC32_PR0_CCITT &&
	    parity != PARITY_CRC16_PR0_CCITT)
		return -EINVAL;

	get_status(port)->encoding = encoding;
	get_status(port)->parity = parity;
	return 0;
}



static int wanxl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	const size_t size = sizeof(sync_serial_settings);
	sync_serial_settings line;
	port_t *port = dev_to_port(dev);

	if (cmd != SIOCWANDEV)
		return hdlc_ioctl(dev, ifr, cmd);

	switch (ifr->ifr_settings.type) {
	case IF_GET_IFACE:
		ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
		if (ifr->ifr_settings.size < size) {
			ifr->ifr_settings.size = size; /* data size wanted */
			return -ENOBUFS;
		}
		line.clock_type = get_status(port)->clocking;
		line.clock_rate = 0;
		line.loopback = 0;

		if (copy_to_user(ifr->ifr_settings.ifs_ifsu.sync, &line, size))
			return -EFAULT;
		return 0;

	case IF_IFACE_SYNC_SERIAL:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;
		if (dev->flags & IFF_UP)
			return -EBUSY;

		if (copy_from_user(&line, ifr->ifr_settings.ifs_ifsu.sync,
				   size))
			return -EFAULT;

		if (line.clock_type != CLOCK_EXT &&
		    line.clock_type != CLOCK_TXFROMRX)
			return -EINVAL; /* No such clock setting */

		if (line.loopback != 0)
			return -EINVAL;

		get_status(port)->clocking = line.clock_type;
		return 0;

	default:
		return hdlc_ioctl(dev, ifr, cmd);
        }
}



static int wanxl_open(struct net_device *dev)
{
	port_t *port = dev_to_port(dev);
	u8 __iomem *dbr = port->card->plx + PLX_DOORBELL_TO_CARD;
	unsigned long timeout;
	int i;

	if (get_status(port)->open) {
		printk(KERN_ERR "%s: port already open\n", dev->name);
		return -EIO;
	}
	if ((i = hdlc_open(dev)) != 0)
		return i;

	port->tx_in = port->tx_out = 0;
	for (i = 0; i < TX_BUFFERS; i++)
		get_status(port)->tx_descs[i].stat = PACKET_EMPTY;
	/* signal the card */
	writel(1 << (DOORBELL_TO_CARD_OPEN_0 + port->node), dbr);

	timeout = jiffies + HZ;
	do
		if (get_status(port)->open) {
			netif_start_queue(dev);
			return 0;
		}
	while (time_after(timeout, jiffies));

	printk(KERN_ERR "%s: unable to open port\n", dev->name);
	/* ask the card to close the port, should it be still alive */
	writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node), dbr);
	return -EFAULT;
}



static int wanxl_close(struct net_device *dev)
{
	port_t *port = dev_to_port(dev);
	unsigned long timeout;
	int i;

	hdlc_close(dev);
	/* signal the card */
	writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node),
	       port->card->plx + PLX_DOORBELL_TO_CARD);

	timeout = jiffies + HZ;
	do
		if (!get_status(port)->open)
			break;
	while (time_after(timeout, jiffies));

	if (get_status(port)->open)
		printk(KERN_ERR "%s: unable to close port\n", dev->name);

	netif_stop_queue(dev);

	for (i = 0; i < TX_BUFFERS; i++) {
		desc_t *desc = &get_status(port)->tx_descs[i];

		if (desc->stat != PACKET_EMPTY) {
			desc->stat = PACKET_EMPTY;
			pci_unmap_single(port->card->pdev, desc->address,
					 port->tx_skbs[i]->len,
					 PCI_DMA_TODEVICE);
			dev_kfree_skb(port->tx_skbs[i]);
		}
	}
	return 0;
}



static struct net_device_stats *wanxl_get_stats(struct net_device *dev)
{
	struct net_device_stats *stats = hdlc_stats(dev);
	port_t *port = dev_to_port(dev);

	stats->rx_over_errors = get_status(port)->rx_overruns;
	stats->rx_frame_errors = get_status(port)->rx_frame_errors;
	stats->rx_errors = stats->rx_over_errors + stats->rx_frame_errors;
        return stats;
}



static int wanxl_puts_command(card_t *card, u32 cmd)
{
	unsigned long timeout = jiffies + 5 * HZ;

	writel(cmd, card->plx + PLX_MAILBOX_1);
	do {
		if (readl(card->plx + PLX_MAILBOX_1) == 0)
			return 0;

		schedule();
	}while (time_after(timeout, jiffies));

	return -1;
}



static void wanxl_reset(card_t *card)
{
	u32 old_value = readl(card->plx + PLX_CONTROL) & ~PLX_CTL_RESET;

	writel(0x80, card->plx + PLX_MAILBOX_0);
	writel(old_value | PLX_CTL_RESET, card->plx + PLX_CONTROL);
	readl(card->plx + PLX_CONTROL); /* wait for posted write */
	udelay(1);
	writel(old_value, card->plx + PLX_CONTROL);
	readl(card->plx + PLX_CONTROL); /* wait for posted write */
}



static void wanxl_pci_remove_one(struct pci_dev *pdev)
{
	card_t *card = pci_get_drvdata(pdev);
	int i;

	for (i = 0; i < card->n_ports; i++) {
		unregister_hdlc_device(card->ports[i].dev);
		free_netdev(card->ports[i].dev);
	}

	/* unregister and free all host resources */
	if (card->irq)
		free_irq(card->irq, card);

	wanxl_reset(card);

	for (i = 0; i < RX_QUEUE_LENGTH; i++)
		if (card->rx_skbs[i]) {
			pci_unmap_single(card->pdev,
					 card->status->rx_descs[i].address,
					 BUFFER_LENGTH, PCI_DMA_FROMDEVICE);
			dev_kfree_skb(card->rx_skbs[i]);
		}

	if (card->plx)
		iounmap(card->plx);

	if (card->status)
		pci_free_consistent(pdev, sizeof(card_status_t),
				    card->status, card->status_address);

	pci_release_regions(pdev);
	pci_disable_device(pdev);
	pci_set_drvdata(pdev, NULL);
	kfree(card);
}


#include "wanxlfw.inc"

static int __devinit wanxl_pci_init_one(struct pci_dev *pdev,
					const struct pci_device_id *ent)
{
	card_t *card;
	u32 ramsize, stat;
	unsigned long timeout;
	u32 plx_phy;		/* PLX PCI base address */
	u32 mem_phy;		/* memory PCI base addr */
	u8 __iomem *mem;	/* memory virtual base addr */
	int i, ports, alloc_size;

#ifndef MODULE
	static int printed_version;
	if (!printed_version) {
		printed_version++;
		printk(KERN_INFO "%s\n", version);
	}
#endif

	i = pci_enable_device(pdev);
	if (i)
		return i;

	/* QUICC can only access first 256 MB of host RAM directly,
	   but PLX9060 DMA does 32-bits for actual packet data transfers */

	/* FIXME when PCI/DMA subsystems are fixed.
	   We set both dma_mask and consistent_dma_mask to 28 bits
	   and pray pci_alloc_consistent() will use this info. It should
	   work on most platforms */
	if (pci_set_consistent_dma_mask(pdev, DMA_28BIT_MASK) ||
	    pci_set_dma_mask(pdev, DMA_28BIT_MASK)) {
		printk(KERN_ERR "wanXL: No usable DMA configuration\n");
		return -EIO;
	}

	i = pci_request_regions(pdev, "wanXL");
	if (i) {
		pci_disable_device(pdev);
		return i;
	}

	switch (pdev->device) {
	case PCI_DEVICE_ID_SBE_WANXL100: ports = 1; break;
	case PCI_DEVICE_ID_SBE_WANXL200: ports = 2; break;
	default: ports = 4;
	}

	alloc_size = sizeof(card_t) + ports * sizeof(port_t);
	card = kmalloc(alloc_size, GFP_KERNEL);
	if (card == NULL) {
		printk(KERN_ERR "wanXL %s: unable to allocate memory\n",
		       pci_name(pdev));
		pci_release_regions(pdev);
		pci_disable_device(pdev);
		return -ENOBUFS;
	}
	memset(card, 0, alloc_size);

	pci_set_drvdata(pdev, card);
	card->pdev = pdev;

	card->status = pci_alloc_consistent(pdev, sizeof(card_status_t),
					    &card->status_address);
	if (card->status == NULL) {
		wanxl_pci_remove_one(pdev);
		return -ENOBUFS;
	}

#ifdef DEBUG_PCI
	printk(KERN_DEBUG "wanXL %s: pci_alloc_consistent() returned memory"
	       " at 0x%LX\n", pci_name(pdev),
	       (unsigned long long)card->status_address);
#endif

	/* FIXME when PCI/DMA subsystems are fixed.
	   We set both dma_mask and consistent_dma_mask back to 32 bits
	   to indicate the card can do 32-bit DMA addressing */
	if (pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK) ||
	    pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
		printk(KERN_ERR "wanXL: No usable DMA configuration\n");
		wanxl_pci_remove_one(pdev);
		return -EIO;
	}

	/* set up PLX mapping */
	plx_phy = pci_resource_start(pdev, 0);

	card->plx = ioremap_nocache(plx_phy, 0x70);
	if (!card->plx) {
		printk(KERN_ERR "wanxl: ioremap() failed\n");
 		wanxl_pci_remove_one(pdev);
		return -EFAULT;
	}

#if RESET_WHILE_LOADING
	wanxl_reset(card);
#endif

	timeout = jiffies + 20 * HZ;
	while ((stat = readl(card->plx + PLX_MAILBOX_0)) != 0) {
		if (time_before(timeout, jiffies)) {
			printk(KERN_WARNING "wanXL %s: timeout waiting for"
			       " PUTS to complete\n", pci_name(pdev));
			wanxl_pci_remove_one(pdev);
			return -ENODEV;
		}

		switch(stat & 0xC0) {
		case 0x00:	/* hmm - PUTS completed with non-zero code? */
		case 0x80:	/* PUTS still testing the hardware */
			break;

		default:
			printk(KERN_WARNING "wanXL %s: PUTS test 0x%X"
			       " failed\n", pci_name(pdev), stat & 0x30);
			wanxl_pci_remove_one(pdev);
			return -ENODEV;
		}

		schedule();
	}

	/* get on-board memory size (PUTS detects no more than 4 MB) */
	ramsize = readl(card->plx + PLX_MAILBOX_2) & MBX2_MEMSZ_MASK;

	/* set up on-board RAM mapping */
	mem_phy = pci_resource_start(pdev, 2);


	/* sanity check the board's reported memory size */
	if (ramsize < BUFFERS_ADDR +
	    (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports) {
		printk(KERN_WARNING "wanXL %s: no enough on-board RAM"
		       " (%u bytes detected, %u bytes required)\n",
		       pci_name(pdev), ramsize, BUFFERS_ADDR +
		       (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports);
		wanxl_pci_remove_one(pdev);
		return -ENODEV;
	}

	if (wanxl_puts_command(card, MBX1_CMD_BSWAP)) {
		printk(KERN_WARNING "wanXL %s: unable to Set Byte Swap"
		       " Mode\n", pci_name(pdev));
		wanxl_pci_remove_one(pdev);
		return -ENODEV;
	}

	for (i = 0; i < RX_QUEUE_LENGTH; i++) {
		struct sk_buff *skb = dev_alloc_skb(BUFFER_LENGTH);
		card->rx_skbs[i] = skb;
		if (skb)
			card->status->rx_descs[i].address =
				pci_map_single(card->pdev, skb->data,
					       BUFFER_LENGTH,
					       PCI_DMA_FROMDEVICE);
	}

	mem = ioremap_nocache(mem_phy, PDM_OFFSET + sizeof(firmware));
	if (!mem) {
		printk(KERN_ERR "wanxl: ioremap() failed\n");
 		wanxl_pci_remove_one(pdev);
		return -EFAULT;
	}

	for (i = 0; i < sizeof(firmware); i += 4)
		writel(htonl(*(u32*)(firmware + i)), mem + PDM_OFFSET + i);

	for (i = 0; i < ports; i++)
		writel(card->status_address +
		       (void *)&card->status->port_status[i] -
		       (void *)card->status, mem + PDM_OFFSET + 4 + i * 4);
	writel(card->status_address, mem + PDM_OFFSET + 20);
	writel(PDM_OFFSET, mem);
	iounmap(mem);

	writel(0, card->plx + PLX_MAILBOX_5);

	if (wanxl_puts_command(card, MBX1_CMD_ABORTJ)) {
		printk(KERN_WARNING "wanXL %s: unable to Abort and Jump\n",
		       pci_name(pdev));
		wanxl_pci_remove_one(pdev);
		return -ENODEV;
	}

	stat = 0;
	timeout = jiffies + 5 * HZ;
	do {
		if ((stat = readl(card->plx + PLX_MAILBOX_5)) != 0)
			break;
		schedule();
	}while (time_after(timeout, jiffies));

	if (!stat) {
		printk(KERN_WARNING "wanXL %s: timeout while initializing card"
		       "firmware\n", pci_name(pdev));
		wanxl_pci_remove_one(pdev);
		return -ENODEV;
	}

#if DETECT_RAM
	ramsize = stat;
#endif

	printk(KERN_INFO "wanXL %s: at 0x%X, %u KB of RAM at 0x%X, irq %u\n",
	       pci_name(pdev), plx_phy, ramsize / 1024, mem_phy, pdev->irq);

	/* Allocate IRQ */
	if (request_irq(pdev->irq, wanxl_intr, IRQF_SHARED, "wanXL", card)) {
		printk(KERN_WARNING "wanXL %s: could not allocate IRQ%i.\n",
		       pci_name(pdev), pdev->irq);
		wanxl_pci_remove_one(pdev);
		return -EBUSY;
	}
	card->irq = pdev->irq;

	for (i = 0; i < ports; i++) {
		hdlc_device *hdlc;
		port_t *port = &card->ports[i];
		struct net_device *dev = alloc_hdlcdev(port);
		if (!dev) {
			printk(KERN_ERR "wanXL %s: unable to allocate"
			       " memory\n", pci_name(pdev));
			wanxl_pci_remove_one(pdev);
			return -ENOMEM;
		}

		port->dev = dev;
		hdlc = dev_to_hdlc(dev);
		spin_lock_init(&port->lock);
		SET_MODULE_OWNER(dev);
		dev->tx_queue_len = 50;
		dev->do_ioctl = wanxl_ioctl;
		dev->open = wanxl_open;
		dev->stop = wanxl_close;
		hdlc->attach = wanxl_attach;
		hdlc->xmit = wanxl_xmit;
		dev->get_stats = wanxl_get_stats;
		port->card = card;
		port->node = i;
		get_status(port)->clocking = CLOCK_EXT;
		if (register_hdlc_device(dev)) {
			printk(KERN_ERR "wanXL %s: unable to register hdlc"
			       " device\n", pci_name(pdev));
			free_netdev(dev);
			wanxl_pci_remove_one(pdev);
			return -ENOBUFS;
		}
		card->n_ports++;
	}

	printk(KERN_INFO "wanXL %s: port", pci_name(pdev));
	for (i = 0; i < ports; i++)
		printk("%s #%i: %s", i ? "," : "", i,
		       card->ports[i].dev->name);
	printk("\n");

	for (i = 0; i < ports; i++)
		wanxl_cable_intr(&card->ports[i]); /* get carrier status etc.*/

	return 0;
}

static struct pci_device_id wanxl_pci_tbl[] __devinitdata = {
	{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL100, PCI_ANY_ID,
	  PCI_ANY_ID, 0, 0, 0 },
	{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL200, PCI_ANY_ID,
	  PCI_ANY_ID, 0, 0, 0 },
	{ PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL400, PCI_ANY_ID,
	  PCI_ANY_ID, 0, 0, 0 },
	{ 0, }
};


static struct pci_driver wanxl_pci_driver = {
	.name		= "wanXL",
	.id_table	= wanxl_pci_tbl,
	.probe		= wanxl_pci_init_one,
	.remove		= wanxl_pci_remove_one,
};


static int __init wanxl_init_module(void)
{
#ifdef MODULE
	printk(KERN_INFO "%s\n", version);
#endif
	return pci_module_init(&wanxl_pci_driver);
}

static void __exit wanxl_cleanup_module(void)
{
	pci_unregister_driver(&wanxl_pci_driver);
}


MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
MODULE_DESCRIPTION("SBE Inc. wanXL serial port driver");
MODULE_LICENSE("GPL v2");
MODULE_DEVICE_TABLE(pci, wanxl_pci_tbl);

module_init(wanxl_init_module);
module_exit(wanxl_cleanup_module);