summaryrefslogtreecommitdiffstats
path: root/drivers/phy/tegra/xusb-tegra186.c
blob: 6f3afaf9398ff4adb8fafa802089aab4862def75 (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
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2016-2019, NVIDIA CORPORATION.  All rights reserved.
 */

#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/regulator/consumer.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/slab.h>

#include <soc/tegra/fuse.h>

#include "xusb.h"

/* FUSE USB_CALIB registers */
#define HS_CURR_LEVEL_PADX_SHIFT(x)	((x) ? (11 + (x - 1) * 6) : 0)
#define HS_CURR_LEVEL_PAD_MASK		0x3f
#define HS_TERM_RANGE_ADJ_SHIFT		7
#define HS_TERM_RANGE_ADJ_MASK		0xf
#define HS_SQUELCH_SHIFT		29
#define HS_SQUELCH_MASK			0x7

#define RPD_CTRL_SHIFT			0
#define RPD_CTRL_MASK			0x1f

/* XUSB PADCTL registers */
#define XUSB_PADCTL_USB2_PAD_MUX	0x4
#define  USB2_PORT_SHIFT(x)		((x) * 2)
#define  USB2_PORT_MASK			0x3
#define   PORT_XUSB			1
#define  HSIC_PORT_SHIFT(x)		((x) + 20)
#define  HSIC_PORT_MASK			0x1
#define   PORT_HSIC			0

#define XUSB_PADCTL_USB2_PORT_CAP	0x8
#define XUSB_PADCTL_SS_PORT_CAP		0xc
#define  PORTX_CAP_SHIFT(x)		((x) * 4)
#define  PORT_CAP_MASK			0x3
#define   PORT_CAP_DISABLED		0x0
#define   PORT_CAP_HOST			0x1
#define   PORT_CAP_DEVICE		0x2
#define   PORT_CAP_OTG			0x3

#define XUSB_PADCTL_ELPG_PROGRAM		0x20
#define  USB2_PORT_WAKE_INTERRUPT_ENABLE(x)		BIT(x)
#define  USB2_PORT_WAKEUP_EVENT(x)			BIT((x) +  7)
#define  SS_PORT_WAKE_INTERRUPT_ENABLE(x)		BIT((x) + 14)
#define  SS_PORT_WAKEUP_EVENT(x)			BIT((x) + 21)
#define  USB2_HSIC_PORT_WAKE_INTERRUPT_ENABLE(x)	BIT((x) + 28)
#define  USB2_HSIC_PORT_WAKEUP_EVENT(x)			BIT((x) + 30)
#define  ALL_WAKE_EVENTS						\
	(USB2_PORT_WAKEUP_EVENT(0) | USB2_PORT_WAKEUP_EVENT(1) |	\
	USB2_PORT_WAKEUP_EVENT(2) | SS_PORT_WAKEUP_EVENT(0) |		\
	SS_PORT_WAKEUP_EVENT(1) | SS_PORT_WAKEUP_EVENT(2) |		\
	USB2_HSIC_PORT_WAKEUP_EVENT(0))

#define XUSB_PADCTL_ELPG_PROGRAM_1		0x24
#define  SSPX_ELPG_CLAMP_EN(x)			BIT(0 + (x) * 3)
#define  SSPX_ELPG_CLAMP_EN_EARLY(x)		BIT(1 + (x) * 3)
#define  SSPX_ELPG_VCORE_DOWN(x)		BIT(2 + (x) * 3)

#define XUSB_PADCTL_USB2_OTG_PADX_CTL0(x)	(0x88 + (x) * 0x40)
#define  HS_CURR_LEVEL(x)			((x) & 0x3f)
#define  TERM_SEL				BIT(25)
#define  USB2_OTG_PD				BIT(26)
#define  USB2_OTG_PD2				BIT(27)
#define  USB2_OTG_PD2_OVRD_EN			BIT(28)
#define  USB2_OTG_PD_ZI				BIT(29)

#define XUSB_PADCTL_USB2_OTG_PADX_CTL1(x)	(0x8c + (x) * 0x40)
#define  USB2_OTG_PD_DR				BIT(2)
#define  TERM_RANGE_ADJ(x)			(((x) & 0xf) << 3)
#define  RPD_CTRL(x)				(((x) & 0x1f) << 26)

#define XUSB_PADCTL_USB2_BIAS_PAD_CTL0		0x284
#define  BIAS_PAD_PD				BIT(11)
#define  HS_SQUELCH_LEVEL(x)			(((x) & 0x7) << 0)

#define XUSB_PADCTL_USB2_BIAS_PAD_CTL1		0x288
#define  USB2_TRK_START_TIMER(x)		(((x) & 0x7f) << 12)
#define  USB2_TRK_DONE_RESET_TIMER(x)		(((x) & 0x7f) << 19)
#define  USB2_PD_TRK				BIT(26)

#define XUSB_PADCTL_HSIC_PADX_CTL0(x)		(0x300 + (x) * 0x20)
#define  HSIC_PD_TX_DATA0			BIT(1)
#define  HSIC_PD_TX_STROBE			BIT(3)
#define  HSIC_PD_RX_DATA0			BIT(4)
#define  HSIC_PD_RX_STROBE			BIT(6)
#define  HSIC_PD_ZI_DATA0			BIT(7)
#define  HSIC_PD_ZI_STROBE			BIT(9)
#define  HSIC_RPD_DATA0				BIT(13)
#define  HSIC_RPD_STROBE			BIT(15)
#define  HSIC_RPU_DATA0				BIT(16)
#define  HSIC_RPU_STROBE			BIT(18)

#define XUSB_PADCTL_HSIC_PAD_TRK_CTL0		0x340
#define  HSIC_TRK_START_TIMER(x)		(((x) & 0x7f) << 5)
#define  HSIC_TRK_DONE_RESET_TIMER(x)		(((x) & 0x7f) << 12)
#define  HSIC_PD_TRK				BIT(19)

#define USB2_VBUS_ID				0x360
#define  VBUS_OVERRIDE				BIT(14)
#define  ID_OVERRIDE(x)				(((x) & 0xf) << 18)
#define  ID_OVERRIDE_FLOATING			ID_OVERRIDE(8)
#define  ID_OVERRIDE_GROUNDED			ID_OVERRIDE(0)

#define TEGRA186_LANE(_name, _offset, _shift, _mask, _type)		\
	{								\
		.name = _name,						\
		.offset = _offset,					\
		.shift = _shift,					\
		.mask = _mask,						\
		.num_funcs = ARRAY_SIZE(tegra186_##_type##_functions),	\
		.funcs = tegra186_##_type##_functions,			\
	}

struct tegra_xusb_fuse_calibration {
	u32 *hs_curr_level;
	u32 hs_squelch;
	u32 hs_term_range_adj;
	u32 rpd_ctrl;
};

struct tegra186_xusb_padctl {
	struct tegra_xusb_padctl base;

	struct tegra_xusb_fuse_calibration calib;

	/* UTMI bias and tracking */
	struct clk *usb2_trk_clk;
	unsigned int bias_pad_enable;
};

static inline struct tegra186_xusb_padctl *
to_tegra186_xusb_padctl(struct tegra_xusb_padctl *padctl)
{
	return container_of(padctl, struct tegra186_xusb_padctl, base);
}

/* USB 2.0 UTMI PHY support */
static struct tegra_xusb_lane *
tegra186_usb2_lane_probe(struct tegra_xusb_pad *pad, struct device_node *np,
			 unsigned int index)
{
	struct tegra_xusb_usb2_lane *usb2;
	int err;

	usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL);
	if (!usb2)
		return ERR_PTR(-ENOMEM);

	INIT_LIST_HEAD(&usb2->base.list);
	usb2->base.soc = &pad->soc->lanes[index];
	usb2->base.index = index;
	usb2->base.pad = pad;
	usb2->base.np = np;

	err = tegra_xusb_lane_parse_dt(&usb2->base, np);
	if (err < 0) {
		kfree(usb2);
		return ERR_PTR(err);
	}

	return &usb2->base;
}

static void tegra186_usb2_lane_remove(struct tegra_xusb_lane *lane)
{
	struct tegra_xusb_usb2_lane *usb2 = to_usb2_lane(lane);

	kfree(usb2);
}

static const struct tegra_xusb_lane_ops tegra186_usb2_lane_ops = {
	.probe = tegra186_usb2_lane_probe,
	.remove = tegra186_usb2_lane_remove,
};

static void tegra186_utmi_bias_pad_power_on(struct tegra_xusb_padctl *padctl)
{
	struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl);
	struct device *dev = padctl->dev;
	u32 value;
	int err;

	mutex_lock(&padctl->lock);

	if (priv->bias_pad_enable++ > 0) {
		mutex_unlock(&padctl->lock);
		return;
	}

	err = clk_prepare_enable(priv->usb2_trk_clk);
	if (err < 0)
		dev_warn(dev, "failed to enable USB2 trk clock: %d\n", err);

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
	value &= ~USB2_TRK_START_TIMER(~0);
	value |= USB2_TRK_START_TIMER(0x1e);
	value &= ~USB2_TRK_DONE_RESET_TIMER(~0);
	value |= USB2_TRK_DONE_RESET_TIMER(0xa);
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL0);
	value &= ~BIAS_PAD_PD;
	value &= ~HS_SQUELCH_LEVEL(~0);
	value |= HS_SQUELCH_LEVEL(priv->calib.hs_squelch);
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL0);

	udelay(1);

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
	value &= ~USB2_PD_TRK;
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);

	mutex_unlock(&padctl->lock);
}

static void tegra186_utmi_bias_pad_power_off(struct tegra_xusb_padctl *padctl)
{
	struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl);
	u32 value;

	mutex_lock(&padctl->lock);

	if (WARN_ON(priv->bias_pad_enable == 0)) {
		mutex_unlock(&padctl->lock);
		return;
	}

	if (--priv->bias_pad_enable > 0) {
		mutex_unlock(&padctl->lock);
		return;
	}

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
	value |= USB2_PD_TRK;
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);

	clk_disable_unprepare(priv->usb2_trk_clk);

	mutex_unlock(&padctl->lock);
}

static void tegra_phy_xusb_utmi_pad_power_on(struct phy *phy)
{
	struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
	struct tegra_xusb_padctl *padctl = lane->pad->padctl;
	struct tegra_xusb_usb2_port *port;
	struct device *dev = padctl->dev;
	unsigned int index = lane->index;
	u32 value;

	if (!phy)
		return;

	port = tegra_xusb_find_usb2_port(padctl, index);
	if (!port) {
		dev_err(dev, "no port found for USB2 lane %u\n", index);
		return;
	}

	tegra186_utmi_bias_pad_power_on(padctl);

	udelay(2);

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index));
	value &= ~USB2_OTG_PD;
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index));

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index));
	value &= ~USB2_OTG_PD_DR;
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index));
}

static void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy)
{
	struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
	struct tegra_xusb_padctl *padctl = lane->pad->padctl;
	unsigned int index = lane->index;
	u32 value;

	if (!phy)
		return;

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index));
	value |= USB2_OTG_PD;
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index));

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index));
	value |= USB2_OTG_PD_DR;
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index));

	udelay(2);

	tegra186_utmi_bias_pad_power_off(padctl);
}

static int tegra186_utmi_phy_power_on(struct phy *phy)
{
	struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
	struct tegra_xusb_usb2_lane *usb2 = to_usb2_lane(lane);
	struct tegra_xusb_padctl *padctl = lane->pad->padctl;
	struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl);
	struct tegra_xusb_usb2_port *port;
	unsigned int index = lane->index;
	struct device *dev = padctl->dev;
	u32 value;

	port = tegra_xusb_find_usb2_port(padctl, index);
	if (!port) {
		dev_err(dev, "no port found for USB2 lane %u\n", index);
		return -ENODEV;
	}

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_PAD_MUX);
	value &= ~(USB2_PORT_MASK << USB2_PORT_SHIFT(index));
	value |= (PORT_XUSB << USB2_PORT_SHIFT(index));
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_PAD_MUX);

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_PORT_CAP);
	value &= ~(PORT_CAP_MASK << PORTX_CAP_SHIFT(index));

	if (port->mode == USB_DR_MODE_UNKNOWN)
		value |= (PORT_CAP_DISABLED << PORTX_CAP_SHIFT(index));
	else if (port->mode == USB_DR_MODE_PERIPHERAL)
		value |= (PORT_CAP_DEVICE << PORTX_CAP_SHIFT(index));
	else if (port->mode == USB_DR_MODE_HOST)
		value |= (PORT_CAP_HOST << PORTX_CAP_SHIFT(index));
	else if (port->mode == USB_DR_MODE_OTG)
		value |= (PORT_CAP_OTG << PORTX_CAP_SHIFT(index));

	padctl_writel(padctl, value, XUSB_PADCTL_USB2_PORT_CAP);

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index));
	value &= ~USB2_OTG_PD_ZI;
	value |= TERM_SEL;
	value &= ~HS_CURR_LEVEL(~0);

	if (usb2->hs_curr_level_offset) {
		int hs_current_level;

		hs_current_level = (int)priv->calib.hs_curr_level[index] +
						usb2->hs_curr_level_offset;

		if (hs_current_level < 0)
			hs_current_level = 0;
		if (hs_current_level > 0x3f)
			hs_current_level = 0x3f;

		value |= HS_CURR_LEVEL(hs_current_level);
	} else {
		value |= HS_CURR_LEVEL(priv->calib.hs_curr_level[index]);
	}

	padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index));

	value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index));
	value &= ~TERM_RANGE_ADJ(~0);
	value |= TERM_RANGE_ADJ(priv->calib.hs_term_range_adj);
	value &= ~RPD_CTRL(~0);
	value |= RPD_CTRL(priv->calib.rpd_ctrl);
	padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index));

	/* TODO: pad power saving */
	tegra_phy_xusb_utmi_pad_power_on(phy);
	return 0;
}

static int tegra186_utmi_phy_power_off(struct phy *phy)
{
	/* TODO: pad power saving */
	tegra_phy_xusb_utmi_pad_power_down(phy);

	return 0;
}

static int tegra186_utmi_phy_init(struct phy *phy)
{
	struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
	struct tegra_xusb_padctl *padctl = lane->pad->padctl;
	struct tegra_xusb_usb2_port *port;
	unsigned int index = lane->index;
	struct device *dev = padctl->dev;
	int err;

	port = tegra_xusb_find_usb2_port(padctl, index);
	if (!port) {
		dev_err(dev, "no port found for USB2 lane %u\n", index);
		return -ENODEV;
	}

	if (port->supply && port->mode == USB_DR_MODE_HOST) {
		err = regulator_enable(port->supply);
		if (err) {
			dev_err(dev, "failed to enable port %u VBUS: %d\n",
				index, err);
			return err;
		}
	}

	return 0;
}

static int tegra186_utmi_phy_exit(struct phy *phy)
{
	struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
	struct tegra_xusb_padctl *padctl = lane->pad->padctl;
	struct tegra_xusb_usb2_port *port;
	unsigned int index = lane->index;
	struct device *dev = padctl->dev;
	int err;

	port = tegra_xusb_find_usb2_port(padctl, index);
	if (!port) {
		dev_err(dev, "no port found for USB2 lane %u\n", index);
		return -ENODEV;
	}

	if (port->supply && port->mode == USB_DR_MODE_HOST) {
		err = regulator_disable(port->supply);
		if (err) {
			dev_err(dev, "failed to disable port %u VBUS: %d\n",
				index, err);
			return err;
		}
	}

	return 0;
}

static const struct phy_ops utmi_phy_ops = {
	.init = tegra186_utmi_phy_init,
	.exit = tegra186_utmi_phy_exit,
	.power_on = tegra186_utmi_phy_power_on,
	.power_off = tegra186_utmi_phy_power_off,
	.owner = THIS_MODULE,
};

static struct tegra_xusb_pad *
tegra186_usb2_pad_probe(struct tegra_xusb_padctl *padctl,
			const struct tegra_xusb_pad_soc *soc,
			struct device_node *np)
{
	struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl);
	struct tegra_xusb_usb2_pad *usb2;
	struct tegra_xusb_pad *pad;
	int err;

	usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL);
	if (!usb2)
		return ERR_PTR(-ENOMEM);

	pad = &usb2->base;
	pad->ops = &tegra186_usb2_lane_ops;
	pad->soc = soc;

	err = tegra_xusb_pad_init(pad, padctl, np);
	if (err < 0) {
		kfree(usb2);
		goto out;
	}

	priv->usb2_trk_clk = devm_clk_get(&pad->dev, "trk");
	if (IS_ERR(priv->usb2_trk_clk)) {
		err = PTR_ERR(priv->usb2_trk_clk);
		dev_dbg(&pad->dev, "failed to get usb2 trk clock: %d\n", err);
		goto unregister;
	}

	err = tegra_xusb_pad_register(pad, &utmi_phy_ops);
	if (err < 0)
		goto unregister;

	dev_set_drvdata(&pad->dev, pad);

	return pad;

unregister:
	device_unregister(&pad->dev);
out:
	return ERR_PTR(err);
}

static void tegra186_usb2_pad_remove(struct tegra_xusb_pad *pad)
{
	struct tegra_xusb_usb2_pad *usb2 = to_usb2_pad(pad);

	kfree(usb2);
}

static const struct tegra_xusb_pad_ops tegra186_usb2_pad_ops = {
	.probe = tegra186_usb2_pad_probe,
	.remove = tegra186_usb2_pad_remove,
};

static const char * const tegra186_usb2_functions[] = {
	"xusb",
};

static const struct tegra_xusb_lane_soc tegra186_usb2_lanes[] = {
	TEGRA186_LANE("usb2-0", 0,  0, 0, usb2),
	TEGRA186_LANE("usb2-1", 0,  0, 0, usb2),
	TEGRA186_LANE("usb2-2", 0,  0, 0, usb2),
};

static const struct tegra_xusb_pad_soc tegra186_usb2_pad = {
	.name = "usb2",
	.num_lanes = ARRAY_SIZE(tegra186_usb2_lanes),
	.lanes = tegra186_usb2_lanes,
	.ops = &tegra186_usb2_pad_ops,
};

static int tegra186_usb2_port_enable(struct tegra_xusb_port *port)
{
	return 0;
}

static void tegra186_usb2_port_disable(struct tegra_xusb_port *port)
{
}

static struct tegra_xusb_lane *
tegra186_usb2_port_map(struct tegra_xusb_port *port)
{
	return tegra_xusb_find_lane(port->padctl, "usb2", port->index);
}

static const struct tegra_xusb_port_ops tegra186_usb2_port_ops = {
	.enable = tegra186_usb2_port_enable,
	.disable = tegra186_usb2_port_disable,
	.map = tegra186_usb2_port_map,
};

/* SuperSpeed PHY support */
static struct tegra_xusb_lane *
tegra186_usb3_lane_probe(struct tegra_xusb_pad *pad, struct device_node *np,
			 unsigned int index)
{
	struct tegra_xusb_usb3_lane *usb3;
	int err;

	usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL);
	if (!usb3)
		return ERR_PTR(-ENOMEM);

	INIT_LIST_HEAD(&usb3->base.list);
	usb3->base.soc = &pad->soc->lanes[index];
	usb3->base.index = index;
	usb3->base.pad = pad;
	usb3->base.np = np;

	err = tegra_xusb_lane_parse_dt(&usb3->base, np);
	if (err < 0) {
		kfree(usb3);
		return ERR_PTR(err);
	}

	return &usb3->base;
}

static void tegra186_usb3_lane_remove(struct tegra_xusb_lane *lane)
{
	struct tegra_xusb_usb3_lane *usb3 = to_usb3_lane(lane);

	kfree(usb3);
}

static const struct tegra_xusb_lane_ops tegra186_usb3_lane_ops = {
	.probe = tegra186_usb3_lane_probe,
	.remove = tegra186_usb3_lane_remove,
};
static int tegra186_usb3_port_enable(struct tegra_xusb_port *port)
{
	return 0;
}

static void tegra186_usb3_port_disable(struct tegra_xusb_port *port)
{
}

static struct tegra_xusb_lane *
tegra186_usb3_port_map(struct tegra_xusb_port *port)
{
	return tegra_xusb_find_lane(port->padctl, "usb3", port->index);
}

static const struct tegra_xusb_port_ops tegra186_usb3_port_ops = {
	.enable = tegra186_usb3_port_enable,
	.disable = tegra186_usb3_port_disable,
	.map = tegra186_usb3_port_map,
};

static int tegra186_usb3_phy_power_on(struct phy *phy)
{
	struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
	struct tegra_xusb_padctl *padctl = lane->pad->padctl;
	struct tegra_xusb_usb3_port *port;
	struct tegra_xusb_usb2_port *usb2;
	unsigned int index = lane->index;
	struct device *dev = padctl->dev;
	u32 value;

	port = tegra_xusb_find_usb3_port(padctl, index);
	if (!port) {
		dev_err(dev, "no port found for USB3 lane %u\n", index);
		return -ENODEV;
	}

	usb2 = tegra_xusb_find_usb2_port(padctl, port->port);
	if (!usb2) {
		dev_err(dev, "no companion port found for USB3 lane %u\n",
			index);
		return -ENODEV;
	}

	mutex_lock(&padctl->lock);

	value = padctl_readl(padctl, XUSB_PADCTL_SS_PORT_CAP);
	value &= ~(PORT_CAP_MASK << PORTX_CAP_SHIFT(index));

	if (usb2->mode == USB_DR_MODE_UNKNOWN)
		value |= (PORT_CAP_DISABLED << PORTX_CAP_SHIFT(index));
	else if (usb2->mode == USB_DR_MODE_PERIPHERAL)
		value |= (PORT_CAP_DEVICE << PORTX_CAP_SHIFT(index));
	else if (usb2->mode == USB_DR_MODE_HOST)
		value |= (PORT_CAP_HOST << PORTX_CAP_SHIFT(index));
	else if (usb2->mode == USB_DR_MODE_OTG)
		value |= (PORT_CAP_OTG << PORTX_CAP_SHIFT(index));

	padctl_writel(padctl, value, XUSB_PADCTL_SS_PORT_CAP);

	value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
	value &= ~SSPX_ELPG_VCORE_DOWN(index);
	padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);

	usleep_range(100, 200);

	value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
	value &= ~SSPX_ELPG_CLAMP_EN_EARLY(index);
	padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);

	usleep_range(100, 200);

	value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
	value &= ~SSPX_ELPG_CLAMP_EN(index);
	padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);

	mutex_unlock(&padctl->lock);

	return 0;
}

static int tegra186_usb3_phy_power_off(struct phy *phy)
{
	struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
	struct tegra_xusb_padctl *padctl = lane->pad->padctl;
	struct tegra_xusb_usb3_port *port;
	unsigned int index = lane->index;
	struct device *dev = padctl->dev;
	u32 value;

	port = tegra_xusb_find_usb3_port(padctl, index);
	if (!port) {
		dev_err(dev, "no port found for USB3 lane %u\n", index);
		return -ENODEV;
	}

	mutex_lock(&padctl->lock);

	value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
	value |= SSPX_ELPG_CLAMP_EN_EARLY(index);
	padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);

	usleep_range(100, 200);

	value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
	value |= SSPX_ELPG_CLAMP_EN(index);
	padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);

	usleep_range(250, 350);

	value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
	value |= SSPX_ELPG_VCORE_DOWN(index);
	padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);

	mutex_unlock(&padctl->lock);

	return 0;
}

static int tegra186_usb3_phy_init(struct phy *phy)
{
	return 0;
}

static int tegra186_usb3_phy_exit(struct phy *phy)
{
	return 0;
}

static const struct phy_ops usb3_phy_ops = {
	.init = tegra186_usb3_phy_init,
	.exit = tegra186_usb3_phy_exit,
	.power_on = tegra186_usb3_phy_power_on,
	.power_off = tegra186_usb3_phy_power_off,
	.owner = THIS_MODULE,
};

static struct tegra_xusb_pad *
tegra186_usb3_pad_probe(struct tegra_xusb_padctl *padctl,
			const struct tegra_xusb_pad_soc *soc,
			struct device_node *np)
{
	struct tegra_xusb_usb3_pad *usb3;
	struct tegra_xusb_pad *pad;
	int err;

	usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL);
	if (!usb3)
		return ERR_PTR(-ENOMEM);

	pad = &usb3->base;
	pad->ops = &tegra186_usb3_lane_ops;
	pad->soc = soc;

	err = tegra_xusb_pad_init(pad, padctl, np);
	if (err < 0) {
		kfree(usb3);
		goto out;
	}

	err = tegra_xusb_pad_register(pad, &usb3_phy_ops);
	if (err < 0)
		goto unregister;

	dev_set_drvdata(&pad->dev, pad);

	return pad;

unregister:
	device_unregister(&pad->dev);
out:
	return ERR_PTR(err);
}

static void tegra186_usb3_pad_remove(struct tegra_xusb_pad *pad)
{
	struct tegra_xusb_usb2_pad *usb2 = to_usb2_pad(pad);

	kfree(usb2);
}

static const struct tegra_xusb_pad_ops tegra186_usb3_pad_ops = {
	.probe = tegra186_usb3_pad_probe,
	.remove = tegra186_usb3_pad_remove,
};

static const char * const tegra186_usb3_functions[] = {
	"xusb",
};

static const struct tegra_xusb_lane_soc tegra186_usb3_lanes[] = {
	TEGRA186_LANE("usb3-0", 0,  0, 0, usb3),
	TEGRA186_LANE("usb3-1", 0,  0, 0, usb3),
	TEGRA186_LANE("usb3-2", 0,  0, 0, usb3),
};

static const struct tegra_xusb_pad_soc tegra186_usb3_pad = {
	.name = "usb3",
	.num_lanes = ARRAY_SIZE(tegra186_usb3_lanes),
	.lanes = tegra186_usb3_lanes,
	.ops = &tegra186_usb3_pad_ops,
};

static const struct tegra_xusb_pad_soc * const tegra186_pads[] = {
	&tegra186_usb2_pad,
	&tegra186_usb3_pad,
#if 0 /* TODO implement */
	&tegra186_hsic_pad,
#endif
};

static int
tegra186_xusb_read_fuse_calibration(struct tegra186_xusb_padctl *padctl)
{
	struct device *dev = padctl->base.dev;
	unsigned int i, count;
	u32 value, *level;
	int err;

	count = padctl->base.soc->ports.usb2.count;

	level = devm_kcalloc(dev, count, sizeof(u32), GFP_KERNEL);
	if (!level)
		return -ENOMEM;

	err = tegra_fuse_readl(TEGRA_FUSE_SKU_CALIB_0, &value);
	if (err) {
		dev_err(dev, "failed to read calibration fuse: %d\n", err);
		return err;
	}

	dev_dbg(dev, "FUSE_USB_CALIB_0 %#x\n", value);

	for (i = 0; i < count; i++)
		level[i] = (value >> HS_CURR_LEVEL_PADX_SHIFT(i)) &
				HS_CURR_LEVEL_PAD_MASK;

	padctl->calib.hs_curr_level = level;

	padctl->calib.hs_squelch = (value >> HS_SQUELCH_SHIFT) &
					HS_SQUELCH_MASK;
	padctl->calib.hs_term_range_adj = (value >> HS_TERM_RANGE_ADJ_SHIFT) &
						HS_TERM_RANGE_ADJ_MASK;

	err = tegra_fuse_readl(TEGRA_FUSE_USB_CALIB_EXT_0, &value);
	if (err) {
		dev_err(dev, "failed to read calibration fuse: %d\n", err);
		return err;
	}

	dev_dbg(dev, "FUSE_USB_CALIB_EXT_0 %#x\n", value);

	padctl->calib.rpd_ctrl = (value >> RPD_CTRL_SHIFT) & RPD_CTRL_MASK;

	return 0;
}

static struct tegra_xusb_padctl *
tegra186_xusb_padctl_probe(struct device *dev,
			   const struct tegra_xusb_padctl_soc *soc)
{
	struct tegra186_xusb_padctl *priv;
	int err;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return ERR_PTR(-ENOMEM);

	priv->base.dev = dev;
	priv->base.soc = soc;

	err = tegra186_xusb_read_fuse_calibration(priv);
	if (err < 0)
		return ERR_PTR(err);

	return &priv->base;
}

static void tegra186_xusb_padctl_remove(struct tegra_xusb_padctl *padctl)
{
}

static const struct tegra_xusb_padctl_ops tegra186_xusb_padctl_ops = {
	.probe = tegra186_xusb_padctl_probe,
	.remove = tegra186_xusb_padctl_remove,
};

static const char * const tegra186_xusb_padctl_supply_names[] = {
	"avdd-pll-erefeut",
	"avdd-usb",
	"vclamp-usb",
	"vddio-hsic",
};

const struct tegra_xusb_padctl_soc tegra186_xusb_padctl_soc = {
	.num_pads = ARRAY_SIZE(tegra186_pads),
	.pads = tegra186_pads,
	.ports = {
		.usb2 = {
			.ops = &tegra186_usb2_port_ops,
			.count = 3,
		},
#if 0 /* TODO implement */
		.hsic = {
			.ops = &tegra186_hsic_port_ops,
			.count = 1,
		},
#endif
		.usb3 = {
			.ops = &tegra186_usb3_port_ops,
			.count = 3,
		},
	},
	.ops = &tegra186_xusb_padctl_ops,
	.supply_names = tegra186_xusb_padctl_supply_names,
	.num_supplies = ARRAY_SIZE(tegra186_xusb_padctl_supply_names),
};
EXPORT_SYMBOL_GPL(tegra186_xusb_padctl_soc);

MODULE_AUTHOR("JC Kuo <jckuo@nvidia.com>");
MODULE_DESCRIPTION("NVIDIA Tegra186 XUSB Pad Controller driver");
MODULE_LICENSE("GPL v2");