summaryrefslogtreecommitdiffstats
path: root/drivers/net/phy/micrel.c
blob: 5a8993b0cafc374c5c0f114ab01dc7618263570d (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
/*
 * drivers/net/phy/micrel.c
 *
 * Driver for Micrel PHYs
 *
 * Author: David J. Choi
 *
 * Copyright (c) 2010-2013 Micrel, Inc.
 *
 * 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.
 *
 * Support : Micrel Phys:
 *		Giga phys: ksz9021, ksz9031
 *		100/10 Phys : ksz8001, ksz8721, ksz8737, ksz8041
 *			   ksz8021, ksz8031, ksz8051,
 *			   ksz8081, ksz8091,
 *			   ksz8061,
 *		Switch : ksz8873, ksz886x
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/phy.h>
#include <linux/micrel_phy.h>
#include <linux/of.h>

/* Operation Mode Strap Override */
#define MII_KSZPHY_OMSO				0x16
#define KSZPHY_OMSO_B_CAST_OFF			(1 << 9)
#define KSZPHY_OMSO_RMII_OVERRIDE		(1 << 1)
#define KSZPHY_OMSO_MII_OVERRIDE		(1 << 0)

/* general Interrupt control/status reg in vendor specific block. */
#define MII_KSZPHY_INTCS			0x1B
#define	KSZPHY_INTCS_JABBER			(1 << 15)
#define	KSZPHY_INTCS_RECEIVE_ERR		(1 << 14)
#define	KSZPHY_INTCS_PAGE_RECEIVE		(1 << 13)
#define	KSZPHY_INTCS_PARELLEL			(1 << 12)
#define	KSZPHY_INTCS_LINK_PARTNER_ACK		(1 << 11)
#define	KSZPHY_INTCS_LINK_DOWN			(1 << 10)
#define	KSZPHY_INTCS_REMOTE_FAULT		(1 << 9)
#define	KSZPHY_INTCS_LINK_UP			(1 << 8)
#define	KSZPHY_INTCS_ALL			(KSZPHY_INTCS_LINK_UP |\
						KSZPHY_INTCS_LINK_DOWN)

/* general PHY control reg in vendor specific block. */
#define	MII_KSZPHY_CTRL			0x1F
/* bitmap of PHY register to set interrupt mode */
#define KSZPHY_CTRL_INT_ACTIVE_HIGH		(1 << 9)
#define KSZ9021_CTRL_INT_ACTIVE_HIGH		(1 << 14)
#define KS8737_CTRL_INT_ACTIVE_HIGH		(1 << 14)
#define KSZ8051_RMII_50MHZ_CLK			(1 << 7)

/* Write/read to/from extended registers */
#define MII_KSZPHY_EXTREG                       0x0b
#define KSZPHY_EXTREG_WRITE                     0x8000

#define MII_KSZPHY_EXTREG_WRITE                 0x0c
#define MII_KSZPHY_EXTREG_READ                  0x0d

/* Extended registers */
#define MII_KSZPHY_CLK_CONTROL_PAD_SKEW         0x104
#define MII_KSZPHY_RX_DATA_PAD_SKEW             0x105
#define MII_KSZPHY_TX_DATA_PAD_SKEW             0x106

#define PS_TO_REG				200

static int ksz_config_flags(struct phy_device *phydev)
{
	int regval;

	if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) {
		regval = phy_read(phydev, MII_KSZPHY_CTRL);
		regval |= KSZ8051_RMII_50MHZ_CLK;
		return phy_write(phydev, MII_KSZPHY_CTRL, regval);
	}
	return 0;
}

static int kszphy_extended_write(struct phy_device *phydev,
				u32 regnum, u16 val)
{
	phy_write(phydev, MII_KSZPHY_EXTREG, KSZPHY_EXTREG_WRITE | regnum);
	return phy_write(phydev, MII_KSZPHY_EXTREG_WRITE, val);
}

static int kszphy_extended_read(struct phy_device *phydev,
				u32 regnum)
{
	phy_write(phydev, MII_KSZPHY_EXTREG, regnum);
	return phy_read(phydev, MII_KSZPHY_EXTREG_READ);
}

static int kszphy_ack_interrupt(struct phy_device *phydev)
{
	/* bit[7..0] int status, which is a read and clear register. */
	int rc;

	rc = phy_read(phydev, MII_KSZPHY_INTCS);

	return (rc < 0) ? rc : 0;
}

static int kszphy_set_interrupt(struct phy_device *phydev)
{
	int temp;
	temp = (PHY_INTERRUPT_ENABLED == phydev->interrupts) ?
		KSZPHY_INTCS_ALL : 0;
	return phy_write(phydev, MII_KSZPHY_INTCS, temp);
}

static int kszphy_config_intr(struct phy_device *phydev)
{
	int temp, rc;

	/* set the interrupt pin active low */
	temp = phy_read(phydev, MII_KSZPHY_CTRL);
	temp &= ~KSZPHY_CTRL_INT_ACTIVE_HIGH;
	phy_write(phydev, MII_KSZPHY_CTRL, temp);
	rc = kszphy_set_interrupt(phydev);
	return rc < 0 ? rc : 0;
}

static int ksz9021_config_intr(struct phy_device *phydev)
{
	int temp, rc;

	/* set the interrupt pin active low */
	temp = phy_read(phydev, MII_KSZPHY_CTRL);
	temp &= ~KSZ9021_CTRL_INT_ACTIVE_HIGH;
	phy_write(phydev, MII_KSZPHY_CTRL, temp);
	rc = kszphy_set_interrupt(phydev);
	return rc < 0 ? rc : 0;
}

static int ks8737_config_intr(struct phy_device *phydev)
{
	int temp, rc;

	/* set the interrupt pin active low */
	temp = phy_read(phydev, MII_KSZPHY_CTRL);
	temp &= ~KS8737_CTRL_INT_ACTIVE_HIGH;
	phy_write(phydev, MII_KSZPHY_CTRL, temp);
	rc = kszphy_set_interrupt(phydev);
	return rc < 0 ? rc : 0;
}

static int kszphy_config_init(struct phy_device *phydev)
{
	return 0;
}

static int ksz8021_config_init(struct phy_device *phydev)
{
	int rc;
	const u16 val = KSZPHY_OMSO_B_CAST_OFF | KSZPHY_OMSO_RMII_OVERRIDE;
	phy_write(phydev, MII_KSZPHY_OMSO, val);
	rc = ksz_config_flags(phydev);
	return rc < 0 ? rc : 0;
}

static int ks8051_config_init(struct phy_device *phydev)
{
	int rc;

	rc = ksz_config_flags(phydev);
	return rc < 0 ? rc : 0;
}

static int ksz9021_load_values_from_of(struct phy_device *phydev,
				       struct device_node *of_node, u16 reg,
				       char *field1, char *field2,
				       char *field3, char *field4)
{
	int val1 = -1;
	int val2 = -2;
	int val3 = -3;
	int val4 = -4;
	int newval;
	int matches = 0;

	if (!of_property_read_u32(of_node, field1, &val1))
		matches++;

	if (!of_property_read_u32(of_node, field2, &val2))
		matches++;

	if (!of_property_read_u32(of_node, field3, &val3))
		matches++;

	if (!of_property_read_u32(of_node, field4, &val4))
		matches++;

	if (!matches)
		return 0;

	if (matches < 4)
		newval = kszphy_extended_read(phydev, reg);
	else
		newval = 0;

	if (val1 != -1)
		newval = ((newval & 0xfff0) | ((val1 / PS_TO_REG) & 0xf) << 0);

	if (val2 != -1)
		newval = ((newval & 0xff0f) | ((val2 / PS_TO_REG) & 0xf) << 4);

	if (val3 != -1)
		newval = ((newval & 0xf0ff) | ((val3 / PS_TO_REG) & 0xf) << 8);

	if (val4 != -1)
		newval = ((newval & 0x0fff) | ((val4 / PS_TO_REG) & 0xf) << 12);

	return kszphy_extended_write(phydev, reg, newval);
}

static int ksz9021_config_init(struct phy_device *phydev)
{
	struct device *dev = &phydev->dev;
	struct device_node *of_node = dev->of_node;

	if (!of_node && dev->parent->of_node)
		of_node = dev->parent->of_node;

	if (of_node) {
		ksz9021_load_values_from_of(phydev, of_node,
				    MII_KSZPHY_CLK_CONTROL_PAD_SKEW,
				    "txen-skew-ps", "txc-skew-ps",
				    "rxdv-skew-ps", "rxc-skew-ps");
		ksz9021_load_values_from_of(phydev, of_node,
				    MII_KSZPHY_RX_DATA_PAD_SKEW,
				    "rxd0-skew-ps", "rxd1-skew-ps",
				    "rxd2-skew-ps", "rxd3-skew-ps");
		ksz9021_load_values_from_of(phydev, of_node,
				    MII_KSZPHY_TX_DATA_PAD_SKEW,
				    "txd0-skew-ps", "txd1-skew-ps",
				    "txd2-skew-ps", "txd3-skew-ps");
	}
	return 0;
}

#define KSZ8873MLL_GLOBAL_CONTROL_4	0x06
#define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX	(1 << 6)
#define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED	(1 << 4)
static int ksz8873mll_read_status(struct phy_device *phydev)
{
	int regval;

	/* dummy read */
	regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);

	regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);

	if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX)
		phydev->duplex = DUPLEX_HALF;
	else
		phydev->duplex = DUPLEX_FULL;

	if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_SPEED)
		phydev->speed = SPEED_10;
	else
		phydev->speed = SPEED_100;

	phydev->link = 1;
	phydev->pause = phydev->asym_pause = 0;

	return 0;
}

static int ksz8873mll_config_aneg(struct phy_device *phydev)
{
	return 0;
}

static struct phy_driver ksphy_driver[] = {
{
	.phy_id		= PHY_ID_KS8737,
	.phy_id_mask	= 0x00fffff0,
	.name		= "Micrel KS8737",
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= kszphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= ks8737_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ8021,
	.phy_id_mask	= 0x00ffffff,
	.name		= "Micrel KSZ8021 or KSZ8031",
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
			   SUPPORTED_Asym_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= ksz8021_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= kszphy_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ8031,
	.phy_id_mask	= 0x00ffffff,
	.name		= "Micrel KSZ8031",
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
			   SUPPORTED_Asym_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= ksz8021_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= kszphy_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ8041,
	.phy_id_mask	= 0x00fffff0,
	.name		= "Micrel KSZ8041",
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
				| SUPPORTED_Asym_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= kszphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= kszphy_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ8041RNLI,
	.phy_id_mask	= 0x00fffff0,
	.name		= "Micrel KSZ8041RNLI",
	.features	= PHY_BASIC_FEATURES |
			  SUPPORTED_Pause | SUPPORTED_Asym_Pause,
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= kszphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= kszphy_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ8051,
	.phy_id_mask	= 0x00fffff0,
	.name		= "Micrel KSZ8051",
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause
				| SUPPORTED_Asym_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= ks8051_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= kszphy_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ8001,
	.name		= "Micrel KSZ8001 or KS8721",
	.phy_id_mask	= 0x00ffffff,
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= kszphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= kszphy_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ8081,
	.name		= "Micrel KSZ8081 or KSZ8091",
	.phy_id_mask	= 0x00fffff0,
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= kszphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= kszphy_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ8061,
	.name		= "Micrel KSZ8061",
	.phy_id_mask	= 0x00fffff0,
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= kszphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= kszphy_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= PHY_ID_KSZ9021,
	.phy_id_mask	= 0x000ffffe,
	.name		= "Micrel KSZ9021 Gigabit PHY",
	.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= ksz9021_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= ksz9021_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE, },
}, {
	.phy_id		= PHY_ID_KSZ9031,
	.phy_id_mask	= 0x00fffff0,
	.name		= "Micrel KSZ9031 Gigabit PHY",
	.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause
				| SUPPORTED_Asym_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= kszphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= kszphy_ack_interrupt,
	.config_intr	= ksz9021_config_intr,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE, },
}, {
	.phy_id		= PHY_ID_KSZ8873MLL,
	.phy_id_mask	= 0x00fffff0,
	.name		= "Micrel KSZ8873MLL Switch",
	.features	= (SUPPORTED_Pause | SUPPORTED_Asym_Pause),
	.flags		= PHY_HAS_MAGICANEG,
	.config_init	= kszphy_config_init,
	.config_aneg	= ksz8873mll_config_aneg,
	.read_status	= ksz8873mll_read_status,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE, },
}, {
	.phy_id		= PHY_ID_KSZ886X,
	.phy_id_mask	= 0x00fffff0,
	.name		= "Micrel KSZ886X Switch",
	.features	= (PHY_BASIC_FEATURES | SUPPORTED_Pause),
	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
	.config_init	= kszphy_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE, },
} };

static int __init ksphy_init(void)
{
	return phy_drivers_register(ksphy_driver,
		ARRAY_SIZE(ksphy_driver));
}

static void __exit ksphy_exit(void)
{
	phy_drivers_unregister(ksphy_driver,
		ARRAY_SIZE(ksphy_driver));
}

module_init(ksphy_init);
module_exit(ksphy_exit);

MODULE_DESCRIPTION("Micrel PHY driver");
MODULE_AUTHOR("David J. Choi");
MODULE_LICENSE("GPL");

static struct mdio_device_id __maybe_unused micrel_tbl[] = {
	{ PHY_ID_KSZ9021, 0x000ffffe },
	{ PHY_ID_KSZ9031, 0x00fffff0 },
	{ PHY_ID_KSZ8001, 0x00ffffff },
	{ PHY_ID_KS8737, 0x00fffff0 },
	{ PHY_ID_KSZ8021, 0x00ffffff },
	{ PHY_ID_KSZ8031, 0x00ffffff },
	{ PHY_ID_KSZ8041, 0x00fffff0 },
	{ PHY_ID_KSZ8051, 0x00fffff0 },
	{ PHY_ID_KSZ8061, 0x00fffff0 },
	{ PHY_ID_KSZ8081, 0x00fffff0 },
	{ PHY_ID_KSZ8873MLL, 0x00fffff0 },
	{ PHY_ID_KSZ886X, 0x00fffff0 },
	{ }
};

MODULE_DEVICE_TABLE(mdio, micrel_tbl);