summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/8390/ax88796.c
blob: 2874680ef24d0f127ce4d2285d39626eeaf9774e (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
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
// SPDX-License-Identifier: GPL-2.0-only
/* drivers/net/ethernet/8390/ax88796.c
 *
 * Copyright 2005,2007 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * Asix AX88796 10/100 Ethernet controller support
 *	Based on ne.c, by Donald Becker, et-al.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/isapnp.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mdio-bitbang.h>
#include <linux/phy.h>
#include <linux/eeprom_93cx6.h>
#include <linux/slab.h>

#include <net/ax88796.h>


/* Rename the lib8390.c functions to show that they are in this driver */
#define __ei_open ax_ei_open
#define __ei_close ax_ei_close
#define __ei_poll ax_ei_poll
#define __ei_start_xmit ax_ei_start_xmit
#define __ei_tx_timeout ax_ei_tx_timeout
#define __ei_get_stats ax_ei_get_stats
#define __ei_set_multicast_list ax_ei_set_multicast_list
#define __ei_interrupt ax_ei_interrupt
#define ____alloc_ei_netdev ax__alloc_ei_netdev
#define __NS8390_init ax_NS8390_init

/* force unsigned long back to 'void __iomem *' */
#define ax_convert_addr(_a) ((void __force __iomem *)(_a))

#define ei_inb(_a) readb(ax_convert_addr(_a))
#define ei_outb(_v, _a) writeb(_v, ax_convert_addr(_a))

#define ei_inb_p(_a) ei_inb(_a)
#define ei_outb_p(_v, _a) ei_outb(_v, _a)

/* define EI_SHIFT() to take into account our register offsets */
#define EI_SHIFT(x) (ei_local->reg_offset[(x)])

/* Ensure we have our RCR base value */
#define AX88796_PLATFORM

static unsigned char version[] = "ax88796.c: Copyright 2005,2007 Simtec Electronics\n";

#include "lib8390.c"

#define DRV_NAME "ax88796"
#define DRV_VERSION "1.00"

/* from ne.c */
#define NE_CMD		EI_SHIFT(0x00)
#define NE_RESET	EI_SHIFT(0x1f)
#define NE_DATAPORT	EI_SHIFT(0x10)

#define NE1SM_START_PG	0x20	/* First page of TX buffer */
#define NE1SM_STOP_PG	0x40	/* Last page +1 of RX ring */
#define NESM_START_PG	0x40	/* First page of TX buffer */
#define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */

#define AX_GPOC_PPDSET	BIT(6)

/* device private data */

struct ax_device {
	struct mii_bus *mii_bus;
	struct mdiobb_ctrl bb_ctrl;
	void __iomem *addr_memr;
	u8 reg_memr;
	int link;
	int speed;
	int duplex;

	void __iomem *map2;
	const struct ax_plat_data *plat;

	unsigned char running;
	unsigned char resume_open;
	unsigned int irqflags;

	u32 reg_offsets[0x20];
};

static inline struct ax_device *to_ax_dev(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	return (struct ax_device *)(ei_local + 1);
}

void ax_NS8390_reinit(struct net_device *dev)
{
	ax_NS8390_init(dev, 1);
}

EXPORT_SYMBOL_GPL(ax_NS8390_reinit);

/*
 * ax_initial_check
 *
 * do an initial probe for the card to check whether it exists
 * and is functional
 */
static int ax_initial_check(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *ioaddr = ei_local->mem;
	int reg0;
	int regd;

	reg0 = ei_inb(ioaddr);
	if (reg0 == 0xFF)
		return -ENODEV;

	ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP, ioaddr + E8390_CMD);
	regd = ei_inb(ioaddr + 0x0d);
	ei_outb(0xff, ioaddr + 0x0d);
	ei_outb(E8390_NODMA + E8390_PAGE0, ioaddr + E8390_CMD);
	ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
	if (ei_inb(ioaddr + EN0_COUNTER0) != 0) {
		ei_outb(reg0, ioaddr);
		ei_outb(regd, ioaddr + 0x0d);	/* Restore the old values. */
		return -ENODEV;
	}

	return 0;
}

/*
 * Hard reset the card. This used to pause for the same period that a
 * 8390 reset command required, but that shouldn't be necessary.
 */
static void ax_reset_8390(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	unsigned long reset_start_time = jiffies;
	void __iomem *addr = (void __iomem *)dev->base_addr;

	netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);

	ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);

	ei_local->txing = 0;
	ei_local->dmaing = 0;

	/* This check _should_not_ be necessary, omit eventually. */
	while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
		if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
			netdev_warn(dev, "%s: did not complete.\n", __func__);
			break;
		}
	}

	ei_outb(ENISR_RESET, addr + EN0_ISR);	/* Ack intr. */
}

/* Wrapper for __ei_interrupt for platforms that have a platform-specific
 * way to find out whether the interrupt request might be caused by
 * the ax88796 chip.
 */
static irqreturn_t ax_ei_interrupt_filtered(int irq, void *dev_id)
{
	struct net_device *dev = dev_id;
	struct ax_device *ax = to_ax_dev(dev);
	struct platform_device *pdev = to_platform_device(dev->dev.parent);

	if (!ax->plat->check_irq(pdev))
		return IRQ_NONE;

	return ax_ei_interrupt(irq, dev_id);
}

static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
			    int ring_page)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *nic_base = ei_local->mem;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
	if (ei_local->dmaing) {
		netdev_err(dev, "DMAing conflict in %s "
			"[DMAstat:%d][irqlock:%d].\n",
			__func__,
			ei_local->dmaing, ei_local->irqlock);
		return;
	}

	ei_local->dmaing |= 0x01;
	ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
	ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
	ei_outb(0, nic_base + EN0_RCNTHI);
	ei_outb(0, nic_base + EN0_RSARLO);		/* On page boundary */
	ei_outb(ring_page, nic_base + EN0_RSARHI);
	ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);

	if (ei_local->word16)
		ioread16_rep(nic_base + NE_DATAPORT, hdr,
			     sizeof(struct e8390_pkt_hdr) >> 1);
	else
		ioread8_rep(nic_base + NE_DATAPORT, hdr,
			    sizeof(struct e8390_pkt_hdr));

	ei_outb(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_local->dmaing &= ~0x01;

	le16_to_cpus(&hdr->count);
}


/*
 * Block input and output, similar to the Crynwr packet driver. If
 * you are porting to a new ethercard, look at the packet driver
 * source for hints. The NEx000 doesn't share the on-board packet
 * memory -- you have to put the packet out through the "remote DMA"
 * dataport using ei_outb.
 */
static void ax_block_input(struct net_device *dev, int count,
			   struct sk_buff *skb, int ring_offset)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *nic_base = ei_local->mem;
	char *buf = skb->data;

	if (ei_local->dmaing) {
		netdev_err(dev,
			"DMAing conflict in %s "
			"[DMAstat:%d][irqlock:%d].\n",
			__func__,
			ei_local->dmaing, ei_local->irqlock);
		return;
	}

	ei_local->dmaing |= 0x01;

	ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base + NE_CMD);
	ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
	ei_outb(count >> 8, nic_base + EN0_RCNTHI);
	ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
	ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI);
	ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);

	if (ei_local->word16) {
		ioread16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
		if (count & 0x01)
			buf[count-1] = ei_inb(nic_base + NE_DATAPORT);

	} else {
		ioread8_rep(nic_base + NE_DATAPORT, buf, count);
	}

	ei_local->dmaing &= ~1;
}

static void ax_block_output(struct net_device *dev, int count,
			    const unsigned char *buf, const int start_page)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *nic_base = ei_local->mem;
	unsigned long dma_start;

	/*
	 * Round the count up for word writes. Do we need to do this?
	 * What effect will an odd byte count have on the 8390?  I
	 * should check someday.
	 */
	if (ei_local->word16 && (count & 0x01))
		count++;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
	if (ei_local->dmaing) {
		netdev_err(dev, "DMAing conflict in %s."
			"[DMAstat:%d][irqlock:%d]\n",
			__func__,
		       ei_local->dmaing, ei_local->irqlock);
		return;
	}

	ei_local->dmaing |= 0x01;
	/* We should already be in page 0, but to be safe... */
	ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);

	ei_outb(ENISR_RDC, nic_base + EN0_ISR);

	/* Now the normal output. */
	ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
	ei_outb(count >> 8, nic_base + EN0_RCNTHI);
	ei_outb(0x00, nic_base + EN0_RSARLO);
	ei_outb(start_page, nic_base + EN0_RSARHI);

	ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
	if (ei_local->word16)
		iowrite16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
	else
		iowrite8_rep(nic_base + NE_DATAPORT, buf, count);

	dma_start = jiffies;

	while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
		if (time_after(jiffies, dma_start + 2 * HZ / 100)) { /* 20ms */
			netdev_warn(dev, "timeout waiting for Tx RDC.\n");
			ax_reset_8390(dev);
			ax_NS8390_init(dev, 1);
			break;
		}
	}

	ei_outb(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_local->dmaing &= ~0x01;
}

/* definitions for accessing MII/EEPROM interface */

#define AX_MEMR			EI_SHIFT(0x14)
#define AX_MEMR_MDC		BIT(0)
#define AX_MEMR_MDIR		BIT(1)
#define AX_MEMR_MDI		BIT(2)
#define AX_MEMR_MDO		BIT(3)
#define AX_MEMR_EECS		BIT(4)
#define AX_MEMR_EEI		BIT(5)
#define AX_MEMR_EEO		BIT(6)
#define AX_MEMR_EECLK		BIT(7)

static void ax_handle_link_change(struct net_device *dev)
{
	struct ax_device  *ax = to_ax_dev(dev);
	struct phy_device *phy_dev = dev->phydev;
	int status_change = 0;

	if (phy_dev->link && ((ax->speed != phy_dev->speed) ||
			     (ax->duplex != phy_dev->duplex))) {

		ax->speed = phy_dev->speed;
		ax->duplex = phy_dev->duplex;
		status_change = 1;
	}

	if (phy_dev->link != ax->link) {
		if (!phy_dev->link) {
			ax->speed = 0;
			ax->duplex = -1;
		}
		ax->link = phy_dev->link;

		status_change = 1;
	}

	if (status_change)
		phy_print_status(phy_dev);
}

static int ax_mii_probe(struct net_device *dev)
{
	struct ax_device  *ax = to_ax_dev(dev);
	struct phy_device *phy_dev = NULL;
	int ret;

	/* find the first phy */
	phy_dev = phy_find_first(ax->mii_bus);
	if (!phy_dev) {
		netdev_err(dev, "no PHY found\n");
		return -ENODEV;
	}

	ret = phy_connect_direct(dev, phy_dev, ax_handle_link_change,
				 PHY_INTERFACE_MODE_MII);
	if (ret) {
		netdev_err(dev, "Could not attach to PHY\n");
		return ret;
	}

	phy_set_max_speed(phy_dev, SPEED_100);

	netdev_info(dev, "PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
		    phy_dev->drv->name, phydev_name(phy_dev), phy_dev->irq);

	return 0;
}

static void ax_phy_switch(struct net_device *dev, int on)
{
	struct ei_device *ei_local = netdev_priv(dev);
	struct ax_device *ax = to_ax_dev(dev);

	u8 reg_gpoc =  ax->plat->gpoc_val;

	if (!!on)
		reg_gpoc &= ~AX_GPOC_PPDSET;
	else
		reg_gpoc |= AX_GPOC_PPDSET;

	ei_outb(reg_gpoc, ei_local->mem + EI_SHIFT(0x17));
}

static void ax_bb_mdc(struct mdiobb_ctrl *ctrl, int level)
{
	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);

	if (level)
		ax->reg_memr |= AX_MEMR_MDC;
	else
		ax->reg_memr &= ~AX_MEMR_MDC;

	ei_outb(ax->reg_memr, ax->addr_memr);
}

static void ax_bb_dir(struct mdiobb_ctrl *ctrl, int output)
{
	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);

	if (output)
		ax->reg_memr &= ~AX_MEMR_MDIR;
	else
		ax->reg_memr |= AX_MEMR_MDIR;

	ei_outb(ax->reg_memr, ax->addr_memr);
}

static void ax_bb_set_data(struct mdiobb_ctrl *ctrl, int value)
{
	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);

	if (value)
		ax->reg_memr |= AX_MEMR_MDO;
	else
		ax->reg_memr &= ~AX_MEMR_MDO;

	ei_outb(ax->reg_memr, ax->addr_memr);
}

static int ax_bb_get_data(struct mdiobb_ctrl *ctrl)
{
	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
	int reg_memr = ei_inb(ax->addr_memr);

	return reg_memr & AX_MEMR_MDI ? 1 : 0;
}

static const struct mdiobb_ops bb_ops = {
	.owner = THIS_MODULE,
	.set_mdc = ax_bb_mdc,
	.set_mdio_dir = ax_bb_dir,
	.set_mdio_data = ax_bb_set_data,
	.get_mdio_data = ax_bb_get_data,
};

static int ax_mii_init(struct net_device *dev)
{
	struct platform_device *pdev = to_platform_device(dev->dev.parent);
	struct ei_device *ei_local = netdev_priv(dev);
	struct ax_device *ax = to_ax_dev(dev);
	int err;

	ax->bb_ctrl.ops = &bb_ops;
	ax->addr_memr = ei_local->mem + AX_MEMR;
	ax->mii_bus = alloc_mdio_bitbang(&ax->bb_ctrl);
	if (!ax->mii_bus) {
		err = -ENOMEM;
		goto out;
	}

	ax->mii_bus->name = "ax88796_mii_bus";
	ax->mii_bus->parent = dev->dev.parent;
	snprintf(ax->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
		 pdev->name, pdev->id);

	err = mdiobus_register(ax->mii_bus);
	if (err)
		goto out_free_mdio_bitbang;

	return 0;

 out_free_mdio_bitbang:
	free_mdio_bitbang(ax->mii_bus);
 out:
	return err;
}

static int ax_open(struct net_device *dev)
{
	struct ax_device *ax = to_ax_dev(dev);
	int ret;

	netdev_dbg(dev, "open\n");

	ret = ax_mii_init(dev);
	if (ret)
		goto failed_mii;

	if (ax->plat->check_irq)
		ret = request_irq(dev->irq, ax_ei_interrupt_filtered,
				  ax->irqflags, dev->name, dev);
	else
		ret = request_irq(dev->irq, ax_ei_interrupt, ax->irqflags,
				  dev->name, dev);
	if (ret)
		goto failed_request_irq;

	/* turn the phy on (if turned off) */
	ax_phy_switch(dev, 1);

	ret = ax_mii_probe(dev);
	if (ret)
		goto failed_mii_probe;
	phy_start(dev->phydev);

	ret = ax_ei_open(dev);
	if (ret)
		goto failed_ax_ei_open;

	ax->running = 1;

	return 0;

 failed_ax_ei_open:
	phy_disconnect(dev->phydev);
 failed_mii_probe:
	ax_phy_switch(dev, 0);
	free_irq(dev->irq, dev);
 failed_request_irq:
	/* unregister mdiobus */
	mdiobus_unregister(ax->mii_bus);
	free_mdio_bitbang(ax->mii_bus);
 failed_mii:
	return ret;
}

static int ax_close(struct net_device *dev)
{
	struct ax_device *ax = to_ax_dev(dev);

	netdev_dbg(dev, "close\n");

	ax->running = 0;
	wmb();

	ax_ei_close(dev);

	/* turn the phy off */
	ax_phy_switch(dev, 0);
	phy_disconnect(dev->phydev);

	free_irq(dev->irq, dev);

	mdiobus_unregister(ax->mii_bus);
	free_mdio_bitbang(ax->mii_bus);
	return 0;
}

static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
	struct phy_device *phy_dev = dev->phydev;

	if (!netif_running(dev))
		return -EINVAL;

	if (!phy_dev)
		return -ENODEV;

	return phy_mii_ioctl(phy_dev, req, cmd);
}

/* ethtool ops */

static void ax_get_drvinfo(struct net_device *dev,
			   struct ethtool_drvinfo *info)
{
	struct platform_device *pdev = to_platform_device(dev->dev.parent);

	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
	strscpy(info->version, DRV_VERSION, sizeof(info->version));
	strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
}

static u32 ax_get_msglevel(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);

	return ei_local->msg_enable;
}

static void ax_set_msglevel(struct net_device *dev, u32 v)
{
	struct ei_device *ei_local = netdev_priv(dev);

	ei_local->msg_enable = v;
}

static const struct ethtool_ops ax_ethtool_ops = {
	.get_drvinfo		= ax_get_drvinfo,
	.get_link		= ethtool_op_get_link,
	.get_ts_info		= ethtool_op_get_ts_info,
	.get_msglevel		= ax_get_msglevel,
	.set_msglevel		= ax_set_msglevel,
	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
};

#ifdef CONFIG_AX88796_93CX6
static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
	struct ei_device *ei_local = eeprom->data;
	u8 reg = ei_inb(ei_local->mem + AX_MEMR);

	eeprom->reg_data_in = reg & AX_MEMR_EEI;
	eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
	eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
	eeprom->reg_chip_select = reg & AX_MEMR_EECS;
}

static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
	struct ei_device *ei_local = eeprom->data;
	u8 reg = ei_inb(ei_local->mem + AX_MEMR);

	reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);

	if (eeprom->reg_data_in)
		reg |= AX_MEMR_EEI;
	if (eeprom->reg_data_clock)
		reg |= AX_MEMR_EECLK;
	if (eeprom->reg_chip_select)
		reg |= AX_MEMR_EECS;

	ei_outb(reg, ei_local->mem + AX_MEMR);
	udelay(10);
}
#endif

static const struct net_device_ops ax_netdev_ops = {
	.ndo_open		= ax_open,
	.ndo_stop		= ax_close,
	.ndo_eth_ioctl		= ax_ioctl,

	.ndo_start_xmit		= ax_ei_start_xmit,
	.ndo_tx_timeout		= ax_ei_tx_timeout,
	.ndo_get_stats		= ax_ei_get_stats,
	.ndo_set_rx_mode	= ax_ei_set_multicast_list,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= ax_ei_poll,
#endif
};

/* setup code */

static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
{
	void __iomem *ioaddr = ei_local->mem;
	struct ax_device *ax = to_ax_dev(dev);

	/* Select page 0 */
	ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_STOP, ioaddr + E8390_CMD);

	/* set to byte access */
	ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG);
	ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17));
}

/*
 * ax_init_dev
 *
 * initialise the specified device, taking care to note the MAC
 * address it may already have (if configured), ensure
 * the device is ready to be used by lib8390.c and registerd with
 * the network layer.
 */
static int ax_init_dev(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	struct ax_device *ax = to_ax_dev(dev);
	void __iomem *ioaddr = ei_local->mem;
	unsigned int start_page;
	unsigned int stop_page;
	int ret;
	int i;

	ret = ax_initial_check(dev);
	if (ret)
		goto err_out;

	/* setup goes here */

	ax_initial_setup(dev, ei_local);

	/* read the mac from the card prom if we need it */

	if (ax->plat->flags & AXFLG_HAS_EEPROM) {
		unsigned char SA_prom[32];

		ei_outb(6, ioaddr + EN0_RCNTLO);
		ei_outb(0, ioaddr + EN0_RCNTHI);
		ei_outb(0, ioaddr + EN0_RSARLO);
		ei_outb(0, ioaddr + EN0_RSARHI);
		ei_outb(E8390_RREAD + E8390_START, ioaddr + NE_CMD);
		for (i = 0; i < sizeof(SA_prom); i += 2) {
			SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT);
			SA_prom[i + 1] = ei_inb(ioaddr + NE_DATAPORT);
		}
		ei_outb(ENISR_RDC, ioaddr + EN0_ISR);	/* Ack intr. */

		if (ax->plat->wordlength == 2)
			for (i = 0; i < 16; i++)
				SA_prom[i] = SA_prom[i+i];

		eth_hw_addr_set(dev, SA_prom);
	}

#ifdef CONFIG_AX88796_93CX6
	if (ax->plat->flags & AXFLG_HAS_93CX6) {
		unsigned char mac_addr[ETH_ALEN];
		struct eeprom_93cx6 eeprom;

		eeprom.data = ei_local;
		eeprom.register_read = ax_eeprom_register_read;
		eeprom.register_write = ax_eeprom_register_write;
		eeprom.width = PCI_EEPROM_WIDTH_93C56;

		eeprom_93cx6_multiread(&eeprom, 0,
				       (__le16 __force *)mac_addr,
				       sizeof(mac_addr) >> 1);

		eth_hw_addr_set(dev, mac_addr);
	}
#endif
	if (ax->plat->wordlength == 2) {
		/* We must set the 8390 for word mode. */
		ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
		start_page = NESM_START_PG;
		stop_page = NESM_STOP_PG;
	} else {
		start_page = NE1SM_START_PG;
		stop_page = NE1SM_STOP_PG;
	}

	/* load the mac-address from the device */
	if (ax->plat->flags & AXFLG_MAC_FROMDEV) {
		u8 addr[ETH_ALEN];

		ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
			ei_local->mem + E8390_CMD); /* 0x61 */
		for (i = 0; i < ETH_ALEN; i++)
			addr[i] = ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
		eth_hw_addr_set(dev, addr);
	}

	if ((ax->plat->flags & AXFLG_MAC_FROMPLATFORM) &&
	    ax->plat->mac_addr)
		eth_hw_addr_set(dev, ax->plat->mac_addr);

	if (!is_valid_ether_addr(dev->dev_addr)) {
		eth_hw_addr_random(dev);
		dev_info(&dev->dev, "Using random MAC address: %pM\n",
			 dev->dev_addr);
	}

	ax_reset_8390(dev);

	ei_local->name = "AX88796";
	ei_local->tx_start_page = start_page;
	ei_local->stop_page = stop_page;
	ei_local->word16 = (ax->plat->wordlength == 2);
	ei_local->rx_start_page = start_page + TX_PAGES;

#ifdef PACKETBUF_MEMSIZE
	/* Allow the packet buffer size to be overridden by know-it-alls. */
	ei_local->stop_page = ei_local->tx_start_page + PACKETBUF_MEMSIZE;
#endif

	ei_local->reset_8390 = &ax_reset_8390;
	if (ax->plat->block_input)
		ei_local->block_input = ax->plat->block_input;
	else
		ei_local->block_input = &ax_block_input;
	if (ax->plat->block_output)
		ei_local->block_output = ax->plat->block_output;
	else
		ei_local->block_output = &ax_block_output;
	ei_local->get_8390_hdr = &ax_get_8390_hdr;
	ei_local->priv = 0;

	dev->netdev_ops = &ax_netdev_ops;
	dev->ethtool_ops = &ax_ethtool_ops;

	ax_NS8390_init(dev, 0);

	ret = register_netdev(dev);
	if (ret)
		goto err_out;

	netdev_info(dev, "%dbit, irq %d, %lx, MAC: %pM\n",
		    ei_local->word16 ? 16 : 8, dev->irq, dev->base_addr,
		    dev->dev_addr);

	return 0;

 err_out:
	return ret;
}

static void ax_remove(struct platform_device *pdev)
{
	struct net_device *dev = platform_get_drvdata(pdev);
	struct ei_device *ei_local = netdev_priv(dev);
	struct ax_device *ax = to_ax_dev(dev);
	struct resource *mem;

	unregister_netdev(dev);

	iounmap(ei_local->mem);
	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(mem->start, resource_size(mem));

	if (ax->map2) {
		iounmap(ax->map2);
		mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
		release_mem_region(mem->start, resource_size(mem));
	}

	platform_set_drvdata(pdev, NULL);
	free_netdev(dev);
}

/*
 * ax_probe
 *
 * This is the entry point when the platform device system uses to
 * notify us of a new device to attach to. Allocate memory, find the
 * resources and information passed, and map the necessary registers.
 */
static int ax_probe(struct platform_device *pdev)
{
	struct net_device *dev;
	struct ei_device *ei_local;
	struct ax_device *ax;
	struct resource *irq, *mem, *mem2;
	unsigned long mem_size, mem2_size = 0;
	int ret = 0;

	dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
	if (dev == NULL)
		return -ENOMEM;

	/* ok, let's setup our device */
	SET_NETDEV_DEV(dev, &pdev->dev);
	ei_local = netdev_priv(dev);
	ax = to_ax_dev(dev);

	ax->plat = dev_get_platdata(&pdev->dev);
	platform_set_drvdata(pdev, dev);

	ei_local->rxcr_base = ax->plat->rcr_val;

	/* find the platform resources */
	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!irq) {
		dev_err(&pdev->dev, "no IRQ specified\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	dev->irq = irq->start;
	ax->irqflags = irq->flags & IRQF_TRIGGER_MASK;

	if (irq->flags &  IORESOURCE_IRQ_SHAREABLE)
		ax->irqflags |= IRQF_SHARED;

	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!mem) {
		dev_err(&pdev->dev, "no MEM specified\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	mem_size = resource_size(mem);

	/*
	 * setup the register offsets from either the platform data or
	 * by using the size of the resource provided
	 */
	if (ax->plat->reg_offsets)
		ei_local->reg_offset = ax->plat->reg_offsets;
	else {
		ei_local->reg_offset = ax->reg_offsets;
		for (ret = 0; ret < 0x18; ret++)
			ax->reg_offsets[ret] = (mem_size / 0x18) * ret;
	}

	if (!request_mem_region(mem->start, mem_size, pdev->name)) {
		dev_err(&pdev->dev, "cannot reserve registers\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	ei_local->mem = ioremap(mem->start, mem_size);
	dev->base_addr = (unsigned long)ei_local->mem;

	if (ei_local->mem == NULL) {
		dev_err(&pdev->dev, "Cannot ioremap area %pR\n", mem);

		ret = -ENXIO;
		goto exit_req;
	}

	/* look for reset area */
	mem2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (!mem2) {
		if (!ax->plat->reg_offsets) {
			for (ret = 0; ret < 0x20; ret++)
				ax->reg_offsets[ret] = (mem_size / 0x20) * ret;
		}
	} else {
		mem2_size = resource_size(mem2);

		if (!request_mem_region(mem2->start, mem2_size, pdev->name)) {
			dev_err(&pdev->dev, "cannot reserve registers\n");
			ret = -ENXIO;
			goto exit_mem1;
		}

		ax->map2 = ioremap(mem2->start, mem2_size);
		if (!ax->map2) {
			dev_err(&pdev->dev, "cannot map reset register\n");
			ret = -ENXIO;
			goto exit_mem2;
		}

		ei_local->reg_offset[0x1f] = ax->map2 - ei_local->mem;
	}

	/* got resources, now initialise and register device */
	ret = ax_init_dev(dev);
	if (!ret)
		return 0;

	if (!ax->map2)
		goto exit_mem1;

	iounmap(ax->map2);

 exit_mem2:
	if (mem2)
		release_mem_region(mem2->start, mem2_size);

 exit_mem1:
	iounmap(ei_local->mem);

 exit_req:
	release_mem_region(mem->start, mem_size);

 exit_mem:
	platform_set_drvdata(pdev, NULL);
	free_netdev(dev);

	return ret;
}

/* suspend and resume */

#ifdef CONFIG_PM
static int ax_suspend(struct platform_device *dev, pm_message_t state)
{
	struct net_device *ndev = platform_get_drvdata(dev);
	struct ax_device *ax = to_ax_dev(ndev);

	ax->resume_open = ax->running;

	netif_device_detach(ndev);
	ax_close(ndev);

	return 0;
}

static int ax_resume(struct platform_device *pdev)
{
	struct net_device *ndev = platform_get_drvdata(pdev);
	struct ax_device *ax = to_ax_dev(ndev);

	ax_initial_setup(ndev, netdev_priv(ndev));
	ax_NS8390_init(ndev, ax->resume_open);
	netif_device_attach(ndev);

	if (ax->resume_open)
		ax_open(ndev);

	return 0;
}

#else
#define ax_suspend NULL
#define ax_resume NULL
#endif

static struct platform_driver axdrv = {
	.driver	= {
		.name		= "ax88796",
	},
	.probe		= ax_probe,
	.remove_new	= ax_remove,
	.suspend	= ax_suspend,
	.resume		= ax_resume,
};

module_platform_driver(axdrv);

MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:ax88796");