aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/ucc_geth_phy.c
blob: 9373d895b9ec5926d67b4d7c180eec34432cb95b (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
/*
 * Copyright (C) Freescale Semicondutor, Inc. 2006. All rights reserved.
 *
 * Author: Shlomi Gridish <gridish@freescale.com>
 *
 * Description:
 * UCC GETH Driver -- PHY handling
 *
 * Changelog:
 * Jun 28, 2006 Li Yang <LeoLi@freescale.com>
 * - Rearrange code and style fixes
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/crc32.h>
#include <linux/mii.h>
#include <linux/ethtool.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

#include "ucc_geth.h"
#include "ucc_geth_phy.h"

#define ugphy_printk(level, format, arg...)  \
        printk(level format "\n", ## arg)

#define ugphy_dbg(format, arg...)            \
        ugphy_printk(KERN_DEBUG, format , ## arg)
#define ugphy_err(format, arg...)            \
        ugphy_printk(KERN_ERR, format , ## arg)
#define ugphy_info(format, arg...)           \
        ugphy_printk(KERN_INFO, format , ## arg)
#define ugphy_warn(format, arg...)           \
        ugphy_printk(KERN_WARNING, format , ## arg)

#ifdef UGETH_VERBOSE_DEBUG
#define ugphy_vdbg ugphy_dbg
#else
#define ugphy_vdbg(fmt, args...) do { } while (0)
#endif				/* UGETH_VERBOSE_DEBUG */

static void config_genmii_advert(struct ugeth_mii_info *mii_info);
static void genmii_setup_forced(struct ugeth_mii_info *mii_info);
static void genmii_restart_aneg(struct ugeth_mii_info *mii_info);
static int gbit_config_aneg(struct ugeth_mii_info *mii_info);
static int genmii_config_aneg(struct ugeth_mii_info *mii_info);
static int genmii_update_link(struct ugeth_mii_info *mii_info);
static int genmii_read_status(struct ugeth_mii_info *mii_info);

static u16 ucc_geth_phy_read(struct ugeth_mii_info *mii_info, u16 regnum)
{
	u16 retval;
	unsigned long flags;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	spin_lock_irqsave(&mii_info->mdio_lock, flags);
	retval = mii_info->mdio_read(mii_info->dev, mii_info->mii_id, regnum);
	spin_unlock_irqrestore(&mii_info->mdio_lock, flags);

	return retval;
}

static void ucc_geth_phy_write(struct ugeth_mii_info *mii_info, u16 regnum, u16 val)
{
	unsigned long flags;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	spin_lock_irqsave(&mii_info->mdio_lock, flags);
	mii_info->mdio_write(mii_info->dev, mii_info->mii_id, regnum, val);
	spin_unlock_irqrestore(&mii_info->mdio_lock, flags);
}

/* Write value to the PHY for this device to the register at regnum, */
/* waiting until the write is done before it returns.  All PHY */
/* configuration has to be done through the TSEC1 MIIM regs */
void write_phy_reg(struct net_device *dev, int mii_id, int regnum, int value)
{
	struct ucc_geth_private *ugeth = netdev_priv(dev);
	struct ucc_mii_mng *mii_regs;
	enum enet_tbi_mii_reg mii_reg = (enum enet_tbi_mii_reg) regnum;
	u32 tmp_reg;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	spin_lock_irq(&ugeth->lock);

	mii_regs = ugeth->mii_info->mii_regs;

	/* Set this UCC to be the master of the MII managment */
	ucc_set_qe_mux_mii_mng(ugeth->ug_info->uf_info.ucc_num);

	/* Stop the MII management read cycle */
	out_be32(&mii_regs->miimcom, 0);
	/* Setting up the MII Mangement Address Register */
	tmp_reg = ((u32) mii_id << MIIMADD_PHY_ADDRESS_SHIFT) | mii_reg;
	out_be32(&mii_regs->miimadd, tmp_reg);

	/* Setting up the MII Mangement Control Register with the value */
	out_be32(&mii_regs->miimcon, (u32) value);

	/* Wait till MII management write is complete */
	while ((in_be32(&mii_regs->miimind)) & MIIMIND_BUSY)
		cpu_relax();

	spin_unlock_irq(&ugeth->lock);

	udelay(10000);
}

/* Reads from register regnum in the PHY for device dev, */
/* returning the value.  Clears miimcom first.  All PHY */
/* configuration has to be done through the TSEC1 MIIM regs */
int read_phy_reg(struct net_device *dev, int mii_id, int regnum)
{
	struct ucc_geth_private *ugeth = netdev_priv(dev);
	struct ucc_mii_mng *mii_regs;
	enum enet_tbi_mii_reg mii_reg = (enum enet_tbi_mii_reg) regnum;
	u32 tmp_reg;
	u16 value;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	spin_lock_irq(&ugeth->lock);

	mii_regs = ugeth->mii_info->mii_regs;

	/* Setting up the MII Mangement Address Register */
	tmp_reg = ((u32) mii_id << MIIMADD_PHY_ADDRESS_SHIFT) | mii_reg;
	out_be32(&mii_regs->miimadd, tmp_reg);

	/* Perform an MII management read cycle */
	out_be32(&mii_regs->miimcom, MIIMCOM_READ_CYCLE);

	/* Wait till MII management write is complete */
	while ((in_be32(&mii_regs->miimind)) & MIIMIND_BUSY)
		cpu_relax();

	udelay(10000);

	/* Read MII management status  */
	value = (u16) in_be32(&mii_regs->miimstat);
	out_be32(&mii_regs->miimcom, 0);
	if (value == 0xffff)
		ugphy_warn("read wrong value : mii_id %d,mii_reg %d, base %08x",
			   mii_id, mii_reg, (u32) & (mii_regs->miimcfg));

	spin_unlock_irq(&ugeth->lock);

	return (value);
}

void mii_clear_phy_interrupt(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	if (mii_info->phyinfo->ack_interrupt)
		mii_info->phyinfo->ack_interrupt(mii_info);
}

void mii_configure_phy_interrupt(struct ugeth_mii_info *mii_info,
				 u32 interrupts)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	mii_info->interrupts = interrupts;
	if (mii_info->phyinfo->config_intr)
		mii_info->phyinfo->config_intr(mii_info);
}

/* Writes MII_ADVERTISE with the appropriate values, after
 * sanitizing advertise to make sure only supported features
 * are advertised
 */
static void config_genmii_advert(struct ugeth_mii_info *mii_info)
{
	u32 advertise;
	u16 adv;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Only allow advertising what this PHY supports */
	mii_info->advertising &= mii_info->phyinfo->features;
	advertise = mii_info->advertising;

	/* Setup standard advertisement */
	adv = ucc_geth_phy_read(mii_info, MII_ADVERTISE);
	adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
	if (advertise & ADVERTISED_10baseT_Half)
		adv |= ADVERTISE_10HALF;
	if (advertise & ADVERTISED_10baseT_Full)
		adv |= ADVERTISE_10FULL;
	if (advertise & ADVERTISED_100baseT_Half)
		adv |= ADVERTISE_100HALF;
	if (advertise & ADVERTISED_100baseT_Full)
		adv |= ADVERTISE_100FULL;
	ucc_geth_phy_write(mii_info, MII_ADVERTISE, adv);
}

static void genmii_setup_forced(struct ugeth_mii_info *mii_info)
{
	u16 ctrl;
	u32 features = mii_info->phyinfo->features;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	ctrl = ucc_geth_phy_read(mii_info, MII_BMCR);

	ctrl &=
	    ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
	ctrl |= BMCR_RESET;

	switch (mii_info->speed) {
	case SPEED_1000:
		if (features & (SUPPORTED_1000baseT_Half
				| SUPPORTED_1000baseT_Full)) {
			ctrl |= BMCR_SPEED1000;
			break;
		}
		mii_info->speed = SPEED_100;
	case SPEED_100:
		if (features & (SUPPORTED_100baseT_Half
				| SUPPORTED_100baseT_Full)) {
			ctrl |= BMCR_SPEED100;
			break;
		}
		mii_info->speed = SPEED_10;
	case SPEED_10:
		if (features & (SUPPORTED_10baseT_Half
				| SUPPORTED_10baseT_Full))
			break;
	default:		/* Unsupported speed! */
		ugphy_err("%s: Bad speed!", mii_info->dev->name);
		break;
	}

	ucc_geth_phy_write(mii_info, MII_BMCR, ctrl);
}

/* Enable and Restart Autonegotiation */
static void genmii_restart_aneg(struct ugeth_mii_info *mii_info)
{
	u16 ctl;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	ctl = ucc_geth_phy_read(mii_info, MII_BMCR);
	ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
	ucc_geth_phy_write(mii_info, MII_BMCR, ctl);
}

static int gbit_config_aneg(struct ugeth_mii_info *mii_info)
{
	u16 adv;
	u32 advertise;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	if (mii_info->autoneg) {
		/* Configure the ADVERTISE register */
		config_genmii_advert(mii_info);
		advertise = mii_info->advertising;

		adv = ucc_geth_phy_read(mii_info, MII_1000BASETCONTROL);
		adv &= ~(MII_1000BASETCONTROL_FULLDUPLEXCAP |
			 MII_1000BASETCONTROL_HALFDUPLEXCAP);
		if (advertise & SUPPORTED_1000baseT_Half)
			adv |= MII_1000BASETCONTROL_HALFDUPLEXCAP;
		if (advertise & SUPPORTED_1000baseT_Full)
			adv |= MII_1000BASETCONTROL_FULLDUPLEXCAP;
		ucc_geth_phy_write(mii_info, MII_1000BASETCONTROL, adv);

		/* Start/Restart aneg */
		genmii_restart_aneg(mii_info);
	} else
		genmii_setup_forced(mii_info);

	return 0;
}

static int genmii_config_aneg(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	if (mii_info->autoneg) {
		config_genmii_advert(mii_info);
		genmii_restart_aneg(mii_info);
	} else
		genmii_setup_forced(mii_info);

	return 0;
}

static int genmii_update_link(struct ugeth_mii_info *mii_info)
{
	u16 status;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Do a fake read */
	ucc_geth_phy_read(mii_info, MII_BMSR);

	/* Read link and autonegotiation status */
	status = ucc_geth_phy_read(mii_info, MII_BMSR);
	if ((status & BMSR_LSTATUS) == 0)
		mii_info->link = 0;
	else
		mii_info->link = 1;

	/* If we are autonegotiating, and not done,
	 * return an error */
	if (mii_info->autoneg && !(status & BMSR_ANEGCOMPLETE))
		return -EAGAIN;

	return 0;
}

static int genmii_read_status(struct ugeth_mii_info *mii_info)
{
	u16 status;
	int err;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Update the link, but return if there
	 * was an error */
	err = genmii_update_link(mii_info);
	if (err)
		return err;

	if (mii_info->autoneg) {
		status = ucc_geth_phy_read(mii_info, MII_LPA);

		if (status & (LPA_10FULL | LPA_100FULL))
			mii_info->duplex = DUPLEX_FULL;
		else
			mii_info->duplex = DUPLEX_HALF;
		if (status & (LPA_100FULL | LPA_100HALF))
			mii_info->speed = SPEED_100;
		else
			mii_info->speed = SPEED_10;
		mii_info->pause = 0;
	}
	/* On non-aneg, we assume what we put in BMCR is the speed,
	 * though magic-aneg shouldn't prevent this case from occurring
	 */

	return 0;
}

static int marvell_init(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	ucc_geth_phy_write(mii_info, 0x14, 0x0cd2);
	ucc_geth_phy_write(mii_info, 0x1b,
		(ucc_geth_phy_read(mii_info, 0x1b) & ~0x000f) | 0x000b);
	ucc_geth_phy_write(mii_info, MII_BMCR,
		  ucc_geth_phy_read(mii_info, MII_BMCR) | BMCR_RESET);
	msleep(4000);

	return 0;
}

static int marvell_config_aneg(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* The Marvell PHY has an errata which requires
	 * that certain registers get written in order
	 * to restart autonegotiation */
	ucc_geth_phy_write(mii_info, MII_BMCR, BMCR_RESET);

	ucc_geth_phy_write(mii_info, 0x1d, 0x1f);
	ucc_geth_phy_write(mii_info, 0x1e, 0x200c);
	ucc_geth_phy_write(mii_info, 0x1d, 0x5);
	ucc_geth_phy_write(mii_info, 0x1e, 0);
	ucc_geth_phy_write(mii_info, 0x1e, 0x100);

	gbit_config_aneg(mii_info);

	return 0;
}

static int marvell_read_status(struct ugeth_mii_info *mii_info)
{
	u16 status;
	int err;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Update the link, but return if there
	 * was an error */
	err = genmii_update_link(mii_info);
	if (err)
		return err;

	/* If the link is up, read the speed and duplex */
	/* If we aren't autonegotiating, assume speeds
	 * are as set */
	if (mii_info->autoneg && mii_info->link) {
		int speed;
		status = ucc_geth_phy_read(mii_info, MII_M1011_PHY_SPEC_STATUS);

		/* Get the duplexity */
		if (status & MII_M1011_PHY_SPEC_STATUS_FULLDUPLEX)
			mii_info->duplex = DUPLEX_FULL;
		else
			mii_info->duplex = DUPLEX_HALF;

		/* Get the speed */
		speed = status & MII_M1011_PHY_SPEC_STATUS_SPD_MASK;
		switch (speed) {
		case MII_M1011_PHY_SPEC_STATUS_1000:
			mii_info->speed = SPEED_1000;
			break;
		case MII_M1011_PHY_SPEC_STATUS_100:
			mii_info->speed = SPEED_100;
			break;
		default:
			mii_info->speed = SPEED_10;
			break;
		}
		mii_info->pause = 0;
	}

	return 0;
}

static int marvell_ack_interrupt(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Clear the interrupts by reading the reg */
	ucc_geth_phy_read(mii_info, MII_M1011_IEVENT);

	return 0;
}

static int marvell_config_intr(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	if (mii_info->interrupts == MII_INTERRUPT_ENABLED)
		ucc_geth_phy_write(mii_info, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
	else
		ucc_geth_phy_write(mii_info, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);

	return 0;
}

static int cis820x_init(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	ucc_geth_phy_write(mii_info, MII_CIS8201_AUX_CONSTAT,
		  MII_CIS8201_AUXCONSTAT_INIT);
	ucc_geth_phy_write(mii_info, MII_CIS8201_EXT_CON1, MII_CIS8201_EXTCON1_INIT);

	return 0;
}

static int cis820x_read_status(struct ugeth_mii_info *mii_info)
{
	u16 status;
	int err;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Update the link, but return if there
	 * was an error */
	err = genmii_update_link(mii_info);
	if (err)
		return err;

	/* If the link is up, read the speed and duplex */
	/* If we aren't autonegotiating, assume speeds
	 * are as set */
	if (mii_info->autoneg && mii_info->link) {
		int speed;

		status = ucc_geth_phy_read(mii_info, MII_CIS8201_AUX_CONSTAT);
		if (status & MII_CIS8201_AUXCONSTAT_DUPLEX)
			mii_info->duplex = DUPLEX_FULL;
		else
			mii_info->duplex = DUPLEX_HALF;

		speed = status & MII_CIS8201_AUXCONSTAT_SPEED;

		switch (speed) {
		case MII_CIS8201_AUXCONSTAT_GBIT:
			mii_info->speed = SPEED_1000;
			break;
		case MII_CIS8201_AUXCONSTAT_100:
			mii_info->speed = SPEED_100;
			break;
		default:
			mii_info->speed = SPEED_10;
			break;
		}
	}

	return 0;
}

static int cis820x_ack_interrupt(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	ucc_geth_phy_read(mii_info, MII_CIS8201_ISTAT);

	return 0;
}

static int cis820x_config_intr(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	if (mii_info->interrupts == MII_INTERRUPT_ENABLED)
		ucc_geth_phy_write(mii_info, MII_CIS8201_IMASK, MII_CIS8201_IMASK_MASK);
	else
		ucc_geth_phy_write(mii_info, MII_CIS8201_IMASK, 0);

	return 0;
}

#define DM9161_DELAY 10

static int dm9161_read_status(struct ugeth_mii_info *mii_info)
{
	u16 status;
	int err;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Update the link, but return if there
	 * was an error */
	err = genmii_update_link(mii_info);
	if (err)
		return err;

	/* If the link is up, read the speed and duplex */
	/* If we aren't autonegotiating, assume speeds
	 * are as set */
	if (mii_info->autoneg && mii_info->link) {
		status = ucc_geth_phy_read(mii_info, MII_DM9161_SCSR);
		if (status & (MII_DM9161_SCSR_100F | MII_DM9161_SCSR_100H))
			mii_info->speed = SPEED_100;
		else
			mii_info->speed = SPEED_10;

		if (status & (MII_DM9161_SCSR_100F | MII_DM9161_SCSR_10F))
			mii_info->duplex = DUPLEX_FULL;
		else
			mii_info->duplex = DUPLEX_HALF;
	}

	return 0;
}

static int dm9161_config_aneg(struct ugeth_mii_info *mii_info)
{
	struct dm9161_private *priv = mii_info->priv;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	if (0 == priv->resetdone)
		return -EAGAIN;

	return 0;
}

static void dm9161_timer(unsigned long data)
{
	struct ugeth_mii_info *mii_info = (struct ugeth_mii_info *)data;
	struct dm9161_private *priv = mii_info->priv;
	u16 status = ucc_geth_phy_read(mii_info, MII_BMSR);

	ugphy_vdbg("%s: IN", __FUNCTION__);

	if (status & BMSR_ANEGCOMPLETE) {
		priv->resetdone = 1;
	} else
		mod_timer(&priv->timer, jiffies + DM9161_DELAY * HZ);
}

static int dm9161_init(struct ugeth_mii_info *mii_info)
{
	struct dm9161_private *priv;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Allocate the private data structure */
	priv = kmalloc(sizeof(struct dm9161_private), GFP_KERNEL);

	if (NULL == priv)
		return -ENOMEM;

	mii_info->priv = priv;

	/* Reset is not done yet */
	priv->resetdone = 0;

	ucc_geth_phy_write(mii_info, MII_BMCR,
		  ucc_geth_phy_read(mii_info, MII_BMCR) | BMCR_RESET);

	ucc_geth_phy_write(mii_info, MII_BMCR,
		  ucc_geth_phy_read(mii_info, MII_BMCR) & ~BMCR_ISOLATE);

	config_genmii_advert(mii_info);
	/* Start/Restart aneg */
	genmii_config_aneg(mii_info);

	/* Start a timer for DM9161_DELAY seconds to wait
	 * for the PHY to be ready */
	init_timer(&priv->timer);
	priv->timer.function = &dm9161_timer;
	priv->timer.data = (unsigned long)mii_info;
	mod_timer(&priv->timer, jiffies + DM9161_DELAY * HZ);

	return 0;
}

static void dm9161_close(struct ugeth_mii_info *mii_info)
{
	struct dm9161_private *priv = mii_info->priv;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	del_timer_sync(&priv->timer);
	kfree(priv);
}

static int dm9161_ack_interrupt(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Clear the interrupts by reading the reg */
	ucc_geth_phy_read(mii_info, MII_DM9161_INTR);


	return 0;
}

static int dm9161_config_intr(struct ugeth_mii_info *mii_info)
{
	ugphy_vdbg("%s: IN", __FUNCTION__);

	if (mii_info->interrupts == MII_INTERRUPT_ENABLED)
		ucc_geth_phy_write(mii_info, MII_DM9161_INTR, MII_DM9161_INTR_INIT);
	else
		ucc_geth_phy_write(mii_info, MII_DM9161_INTR, MII_DM9161_INTR_STOP);

	return 0;
}

/* Cicada 820x */
static struct phy_info phy_info_cis820x = {
	.phy_id = 0x000fc440,
	.name = "Cicada Cis8204",
	.phy_id_mask = 0x000fffc0,
	.features = MII_GBIT_FEATURES,
	.init = &cis820x_init,
	.config_aneg = &gbit_config_aneg,
	.read_status = &cis820x_read_status,
	.ack_interrupt = &cis820x_ack_interrupt,
	.config_intr = &cis820x_config_intr,
};

static struct phy_info phy_info_dm9161 = {
	.phy_id = 0x0181b880,
	.phy_id_mask = 0x0ffffff0,
	.name = "Davicom DM9161E",
	.init = dm9161_init,
	.config_aneg = dm9161_config_aneg,
	.read_status = dm9161_read_status,
	.close = dm9161_close,
};

static struct phy_info phy_info_dm9161a = {
	.phy_id = 0x0181b8a0,
	.phy_id_mask = 0x0ffffff0,
	.name = "Davicom DM9161A",
	.features = MII_BASIC_FEATURES,
	.init = dm9161_init,
	.config_aneg = dm9161_config_aneg,
	.read_status = dm9161_read_status,
	.ack_interrupt = dm9161_ack_interrupt,
	.config_intr = dm9161_config_intr,
	.close = dm9161_close,
};

static struct phy_info phy_info_marvell = {
	.phy_id = 0x01410c00,
	.phy_id_mask = 0xffffff00,
	.name = "Marvell 88E11x1",
	.features = MII_GBIT_FEATURES,
	.init = &marvell_init,
	.config_aneg = &marvell_config_aneg,
	.read_status = &marvell_read_status,
	.ack_interrupt = &marvell_ack_interrupt,
	.config_intr = &marvell_config_intr,
};

static struct phy_info phy_info_genmii = {
	.phy_id = 0x00000000,
	.phy_id_mask = 0x00000000,
	.name = "Generic MII",
	.features = MII_BASIC_FEATURES,
	.config_aneg = genmii_config_aneg,
	.read_status = genmii_read_status,
};

static struct phy_info *phy_info[] = {
	&phy_info_cis820x,
	&phy_info_marvell,
	&phy_info_dm9161,
	&phy_info_dm9161a,
	&phy_info_genmii,
	NULL
};

/* Use the PHY ID registers to determine what type of PHY is attached
 * to device dev.  return a struct phy_info structure describing that PHY
 */
struct phy_info *get_phy_info(struct ugeth_mii_info *mii_info)
{
	u16 phy_reg;
	u32 phy_ID;
	int i;
	struct phy_info *theInfo = NULL;
	struct net_device *dev = mii_info->dev;

	ugphy_vdbg("%s: IN", __FUNCTION__);

	/* Grab the bits from PHYIR1, and put them in the upper half */
	phy_reg = ucc_geth_phy_read(mii_info, MII_PHYSID1);
	phy_ID = (phy_reg & 0xffff) << 16;

	/* Grab the bits from PHYIR2, and put them in the lower half */
	phy_reg = ucc_geth_phy_read(mii_info, MII_PHYSID2);
	phy_ID |= (phy_reg & 0xffff);

	/* loop through all the known PHY types, and find one that */
	/* matches the ID we read from the PHY. */
	for (i = 0; phy_info[i]; i++)
		if (phy_info[i]->phy_id == (phy_ID & phy_info[i]->phy_id_mask)){
			theInfo = phy_info[i];
			break;
		}

	/* This shouldn't happen, as we have generic PHY support */
	if (theInfo == NULL) {
		ugphy_info("%s: PHY id %x is not supported!", dev->name,
			   phy_ID);
		return NULL;
	} else {
		ugphy_info("%s: PHY is %s (%x)", dev->name, theInfo->name,
			   phy_ID);
	}

	return theInfo;
}