summaryrefslogtreecommitdiffstats
path: root/drivers/net/dsa/mv88e6xxx/serdes.c
blob: 3b4b42651fa3d78209c9ff9c8a4fcbae517f7db2 (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
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Marvell 88E6xxx SERDES manipulation, via SMI bus
 *
 * Copyright (c) 2008 Marvell Semiconductor
 *
 * Copyright (c) 2017 Andrew Lunn <andrew@lunn.ch>
 */

#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/mii.h>

#include "chip.h"
#include "global2.h"
#include "phy.h"
#include "port.h"
#include "serdes.h"

static int mv88e6352_serdes_read(struct mv88e6xxx_chip *chip, int reg,
				 u16 *val)
{
	return mv88e6xxx_phy_page_read(chip, MV88E6352_ADDR_SERDES,
				       MV88E6352_SERDES_PAGE_FIBER,
				       reg, val);
}

static int mv88e6352_serdes_write(struct mv88e6xxx_chip *chip, int reg,
				  u16 val)
{
	return mv88e6xxx_phy_page_write(chip, MV88E6352_ADDR_SERDES,
					MV88E6352_SERDES_PAGE_FIBER,
					reg, val);
}

static int mv88e6390_serdes_read(struct mv88e6xxx_chip *chip,
				 int lane, int device, int reg, u16 *val)
{
	return mv88e6xxx_phy_read_c45(chip, lane, device, reg, val);
}

int mv88e6xxx_pcs_decode_state(struct device *dev, u16 bmsr, u16 lpa,
			       u16 status, struct phylink_link_state *state)
{
	state->link = false;

	/* If the BMSR reports that the link had failed, report this to
	 * phylink.
	 */
	if (!(bmsr & BMSR_LSTATUS))
		return 0;

	state->link = !!(status & MV88E6390_SGMII_PHY_STATUS_LINK);
	state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);

	if (status & MV88E6390_SGMII_PHY_STATUS_SPD_DPL_VALID) {
		/* The Spped and Duplex Resolved register is 1 if AN is enabled
		 * and complete, or if AN is disabled. So with disabled AN we
		 * still get here on link up.
		 */
		state->duplex = status &
				MV88E6390_SGMII_PHY_STATUS_DUPLEX_FULL ?
			                         DUPLEX_FULL : DUPLEX_HALF;

		if (status & MV88E6390_SGMII_PHY_STATUS_TX_PAUSE)
			state->pause |= MLO_PAUSE_TX;
		if (status & MV88E6390_SGMII_PHY_STATUS_RX_PAUSE)
			state->pause |= MLO_PAUSE_RX;

		switch (status & MV88E6390_SGMII_PHY_STATUS_SPEED_MASK) {
		case MV88E6390_SGMII_PHY_STATUS_SPEED_1000:
			if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
				state->speed = SPEED_2500;
			else
				state->speed = SPEED_1000;
			break;
		case MV88E6390_SGMII_PHY_STATUS_SPEED_100:
			state->speed = SPEED_100;
			break;
		case MV88E6390_SGMII_PHY_STATUS_SPEED_10:
			state->speed = SPEED_10;
			break;
		default:
			dev_err(dev, "invalid PHY speed\n");
			return -EINVAL;
		}
	} else if (state->link &&
		   state->interface != PHY_INTERFACE_MODE_SGMII) {
		/* If Speed and Duplex Resolved register is 0 and link is up, it
		 * means that AN was enabled, but link partner had it disabled
		 * and the PHY invoked the Auto-Negotiation Bypass feature and
		 * linked anyway.
		 */
		state->duplex = DUPLEX_FULL;
		if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
			state->speed = SPEED_2500;
		else
			state->speed = SPEED_1000;
	} else {
		state->link = false;
	}

	if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
		mii_lpa_mod_linkmode_x(state->lp_advertising, lpa,
				       ETHTOOL_LINK_MODE_2500baseX_Full_BIT);
	else if (state->interface == PHY_INTERFACE_MODE_1000BASEX)
		mii_lpa_mod_linkmode_x(state->lp_advertising, lpa,
				       ETHTOOL_LINK_MODE_1000baseX_Full_BIT);

	return 0;
}

struct mv88e6352_serdes_hw_stat {
	char string[ETH_GSTRING_LEN];
	int sizeof_stat;
	int reg;
};

static struct mv88e6352_serdes_hw_stat mv88e6352_serdes_hw_stats[] = {
	{ "serdes_fibre_rx_error", 16, 21 },
	{ "serdes_PRBS_error", 32, 24 },
};

int mv88e6352_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port)
{
	int err;

	err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
	if (err <= 0)
		return err;

	return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
}

int mv88e6352_serdes_get_strings(struct mv88e6xxx_chip *chip,
				 int port, uint8_t *data)
{
	struct mv88e6352_serdes_hw_stat *stat;
	int err, i;

	err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
	if (err <= 0)
		return err;

	for (i = 0; i < ARRAY_SIZE(mv88e6352_serdes_hw_stats); i++) {
		stat = &mv88e6352_serdes_hw_stats[i];
		memcpy(data + i * ETH_GSTRING_LEN, stat->string,
		       ETH_GSTRING_LEN);
	}
	return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
}

static uint64_t mv88e6352_serdes_get_stat(struct mv88e6xxx_chip *chip,
					  struct mv88e6352_serdes_hw_stat *stat)
{
	u64 val = 0;
	u16 reg;
	int err;

	err = mv88e6352_serdes_read(chip, stat->reg, &reg);
	if (err) {
		dev_err(chip->dev, "failed to read statistic\n");
		return 0;
	}

	val = reg;

	if (stat->sizeof_stat == 32) {
		err = mv88e6352_serdes_read(chip, stat->reg + 1, &reg);
		if (err) {
			dev_err(chip->dev, "failed to read statistic\n");
			return 0;
		}
		val = val << 16 | reg;
	}

	return val;
}

int mv88e6352_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
			       uint64_t *data)
{
	struct mv88e6xxx_port *mv88e6xxx_port = &chip->ports[port];
	struct mv88e6352_serdes_hw_stat *stat;
	int i, err;
	u64 value;

	err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
	if (err <= 0)
		return err;

	BUILD_BUG_ON(ARRAY_SIZE(mv88e6352_serdes_hw_stats) >
		     ARRAY_SIZE(mv88e6xxx_port->serdes_stats));

	for (i = 0; i < ARRAY_SIZE(mv88e6352_serdes_hw_stats); i++) {
		stat = &mv88e6352_serdes_hw_stats[i];
		value = mv88e6352_serdes_get_stat(chip, stat);
		mv88e6xxx_port->serdes_stats[i] += value;
		data[i] = mv88e6xxx_port->serdes_stats[i];
	}

	return ARRAY_SIZE(mv88e6352_serdes_hw_stats);
}

unsigned int mv88e6352_serdes_irq_mapping(struct mv88e6xxx_chip *chip, int port)
{
	return irq_find_mapping(chip->g2_irq.domain, MV88E6352_SERDES_IRQ);
}

int mv88e6352_serdes_get_regs_len(struct mv88e6xxx_chip *chip, int port)
{
	int err;

	mv88e6xxx_reg_lock(chip);
	err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
	mv88e6xxx_reg_unlock(chip);
	if (err <= 0)
		return err;

	return 32 * sizeof(u16);
}

void mv88e6352_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p)
{
	u16 *p = _p;
	u16 reg;
	int err;
	int i;

	err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
	if (err <= 0)
		return;

	for (i = 0 ; i < 32; i++) {
		err = mv88e6352_serdes_read(chip, i, &reg);
		if (!err)
			p[i] = reg;
	}
}

int mv88e6341_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
	u8 cmode = chip->ports[port].cmode;
	int lane = -ENODEV;

	switch (port) {
	case 5:
		if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
			lane = MV88E6341_PORT5_LANE;
		break;
	}

	return lane;
}

int mv88e6390_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
	u8 cmode = chip->ports[port].cmode;
	int lane = -ENODEV;

	switch (port) {
	case 9:
		if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
			lane = MV88E6390_PORT9_LANE0;
		break;
	case 10:
		if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
			lane = MV88E6390_PORT10_LANE0;
		break;
	}

	return lane;
}

int mv88e6390x_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
	u8 cmode_port = chip->ports[port].cmode;
	u8 cmode_port10 = chip->ports[10].cmode;
	u8 cmode_port9 = chip->ports[9].cmode;
	int lane = -ENODEV;

	switch (port) {
	case 2:
		if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
			if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
				lane = MV88E6390_PORT9_LANE1;
		break;
	case 3:
		if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
			if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
				lane = MV88E6390_PORT9_LANE2;
		break;
	case 4:
		if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
			if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
				lane = MV88E6390_PORT9_LANE3;
		break;
	case 5:
		if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
			if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
				lane = MV88E6390_PORT10_LANE1;
		break;
	case 6:
		if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
			if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
				lane = MV88E6390_PORT10_LANE2;
		break;
	case 7:
		if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
			if (cmode_port == MV88E6XXX_PORT_STS_CMODE_1000BASEX)
				lane = MV88E6390_PORT10_LANE3;
		break;
	case 9:
		if (cmode_port9 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_XAUI ||
		    cmode_port9 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
			lane = MV88E6390_PORT9_LANE0;
		break;
	case 10:
		if (cmode_port10 == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_SGMII ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_XAUI ||
		    cmode_port10 == MV88E6XXX_PORT_STS_CMODE_RXAUI)
			lane = MV88E6390_PORT10_LANE0;
		break;
	}

	return lane;
}

/* Only Ports 0, 9 and 10 have SERDES lanes. Return the SERDES lane address
 * a port is using else Returns -ENODEV.
 */
int mv88e6393x_serdes_get_lane(struct mv88e6xxx_chip *chip, int port)
{
	u8 cmode = chip->ports[port].cmode;
	int lane = -ENODEV;

	if (port != 0 && port != 9 && port != 10)
		return -EOPNOTSUPP;

	if (cmode == MV88E6XXX_PORT_STS_CMODE_1000BASEX ||
	    cmode == MV88E6XXX_PORT_STS_CMODE_SGMII ||
	    cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX ||
	    cmode == MV88E6393X_PORT_STS_CMODE_5GBASER ||
	    cmode == MV88E6393X_PORT_STS_CMODE_10GBASER ||
	    cmode == MV88E6393X_PORT_STS_CMODE_USXGMII)
		lane = port;

	return lane;
}

struct mv88e6390_serdes_hw_stat {
	char string[ETH_GSTRING_LEN];
	int reg;
};

static struct mv88e6390_serdes_hw_stat mv88e6390_serdes_hw_stats[] = {
	{ "serdes_rx_pkts", 0xf021 },
	{ "serdes_rx_bytes", 0xf024 },
	{ "serdes_rx_pkts_error", 0xf027 },
};

int mv88e6390_serdes_get_sset_count(struct mv88e6xxx_chip *chip, int port)
{
	if (mv88e6xxx_serdes_get_lane(chip, port) < 0)
		return 0;

	return ARRAY_SIZE(mv88e6390_serdes_hw_stats);
}

int mv88e6390_serdes_get_strings(struct mv88e6xxx_chip *chip,
				 int port, uint8_t *data)
{
	struct mv88e6390_serdes_hw_stat *stat;
	int i;

	if (mv88e6xxx_serdes_get_lane(chip, port) < 0)
		return 0;

	for (i = 0; i < ARRAY_SIZE(mv88e6390_serdes_hw_stats); i++) {
		stat = &mv88e6390_serdes_hw_stats[i];
		memcpy(data + i * ETH_GSTRING_LEN, stat->string,
		       ETH_GSTRING_LEN);
	}
	return ARRAY_SIZE(mv88e6390_serdes_hw_stats);
}

static uint64_t mv88e6390_serdes_get_stat(struct mv88e6xxx_chip *chip, int lane,
					  struct mv88e6390_serdes_hw_stat *stat)
{
	u16 reg[3];
	int err, i;

	for (i = 0; i < 3; i++) {
		err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
					    stat->reg + i, &reg[i]);
		if (err) {
			dev_err(chip->dev, "failed to read statistic\n");
			return 0;
		}
	}

	return reg[0] | ((u64)reg[1] << 16) | ((u64)reg[2] << 32);
}

int mv88e6390_serdes_get_stats(struct mv88e6xxx_chip *chip, int port,
			       uint64_t *data)
{
	struct mv88e6390_serdes_hw_stat *stat;
	int lane;
	int i;

	lane = mv88e6xxx_serdes_get_lane(chip, port);
	if (lane < 0)
		return 0;

	for (i = 0; i < ARRAY_SIZE(mv88e6390_serdes_hw_stats); i++) {
		stat = &mv88e6390_serdes_hw_stats[i];
		data[i] = mv88e6390_serdes_get_stat(chip, lane, stat);
	}

	return ARRAY_SIZE(mv88e6390_serdes_hw_stats);
}

unsigned int mv88e6390_serdes_irq_mapping(struct mv88e6xxx_chip *chip, int port)
{
	return irq_find_mapping(chip->g2_irq.domain, port);
}

static const u16 mv88e6390_serdes_regs[] = {
	/* SERDES common registers */
	0xf00a, 0xf00b, 0xf00c,
	0xf010, 0xf011, 0xf012, 0xf013,
	0xf016, 0xf017, 0xf018,
	0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
	0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
	0xf028, 0xf029,
	0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
	0xf038, 0xf039,
	/* SGMII */
	0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007,
	0x2008,
	0x200f,
	0xa000, 0xa001, 0xa002, 0xa003,
	/* 10Gbase-X */
	0x1000, 0x1001, 0x1002, 0x1003, 0x1004, 0x1005, 0x1006, 0x1007,
	0x1008,
	0x100e, 0x100f,
	0x1018, 0x1019,
	0x9000, 0x9001, 0x9002, 0x9003, 0x9004,
	0x9006,
	0x9010, 0x9011, 0x9012, 0x9013, 0x9014, 0x9015, 0x9016,
	/* 10Gbase-R */
	0x1020, 0x1021, 0x1022, 0x1023, 0x1024, 0x1025, 0x1026, 0x1027,
	0x1028, 0x1029, 0x102a, 0x102b,
};

int mv88e6390_serdes_get_regs_len(struct mv88e6xxx_chip *chip, int port)
{
	if (mv88e6xxx_serdes_get_lane(chip, port) < 0)
		return 0;

	return ARRAY_SIZE(mv88e6390_serdes_regs) * sizeof(u16);
}

void mv88e6390_serdes_get_regs(struct mv88e6xxx_chip *chip, int port, void *_p)
{
	u16 *p = _p;
	int lane;
	u16 reg;
	int err;
	int i;

	lane = mv88e6xxx_serdes_get_lane(chip, port);
	if (lane < 0)
		return;

	for (i = 0 ; i < ARRAY_SIZE(mv88e6390_serdes_regs); i++) {
		err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
					    mv88e6390_serdes_regs[i], &reg);
		if (!err)
			p[i] = reg;
	}
}

static const int mv88e6352_serdes_p2p_to_reg[] = {
	/* Index of value in microvolts corresponds to the register value */
	14000, 112000, 210000, 308000, 406000, 504000, 602000, 700000,
};

int mv88e6352_serdes_set_tx_amplitude(struct mv88e6xxx_chip *chip, int port,
				      int val)
{
	bool found = false;
	u16 ctrl, reg;
	int err;
	int i;

	err = mv88e6352_g2_scratch_port_has_serdes(chip, port);
	if (err <= 0)
		return err;

	for (i = 0; i < ARRAY_SIZE(mv88e6352_serdes_p2p_to_reg); ++i) {
		if (mv88e6352_serdes_p2p_to_reg[i] == val) {
			reg = i;
			found = true;
			break;
		}
	}

	if (!found)
		return -EINVAL;

	err = mv88e6352_serdes_read(chip, MV88E6352_SERDES_SPEC_CTRL2, &ctrl);
	if (err)
		return err;

	ctrl &= ~MV88E6352_SERDES_OUT_AMP_MASK;
	ctrl |= reg;

	return mv88e6352_serdes_write(chip, MV88E6352_SERDES_SPEC_CTRL2, ctrl);
}