summaryrefslogtreecommitdiff
path: root/drivers/usb/dwc3/dwc3-qcom.c
blob: c5e482f53e9db13f8232f6519fa7016a645d7887 (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
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
 *
 * Inspired by dwc3-of-simple.c
 */

#include <linux/acpi.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/irq.h>
#include <linux/of_clk.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/extcon.h>
#include <linux/interconnect.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/pm_domain.h>
#include <linux/usb/of.h>
#include <linux/reset.h>
#include <linux/iopoll.h>
#include <linux/usb/hcd.h>
#include <linux/usb.h>
#include "core.h"

/* USB QSCRATCH Hardware registers */
#define QSCRATCH_HS_PHY_CTRL			0x10
#define UTMI_OTG_VBUS_VALID			BIT(20)
#define SW_SESSVLD_SEL				BIT(28)

#define QSCRATCH_SS_PHY_CTRL			0x30
#define LANE0_PWR_PRESENT			BIT(24)

#define QSCRATCH_GENERAL_CFG			0x08
#define PIPE_UTMI_CLK_SEL			BIT(0)
#define PIPE3_PHYSTATUS_SW			BIT(3)
#define PIPE_UTMI_CLK_DIS			BIT(8)

#define PWR_EVNT_IRQ_STAT_REG			0x58
#define PWR_EVNT_LPM_IN_L2_MASK			BIT(4)
#define PWR_EVNT_LPM_OUT_L2_MASK		BIT(5)

#define SDM845_QSCRATCH_BASE_OFFSET		0xf8800
#define SDM845_QSCRATCH_SIZE			0x400
#define SDM845_DWC3_CORE_SIZE			0xcd00

/* Interconnect path bandwidths in MBps */
#define USB_MEMORY_AVG_HS_BW MBps_to_icc(240)
#define USB_MEMORY_PEAK_HS_BW MBps_to_icc(700)
#define USB_MEMORY_AVG_SS_BW  MBps_to_icc(1000)
#define USB_MEMORY_PEAK_SS_BW MBps_to_icc(2500)
#define APPS_USB_AVG_BW 0
#define APPS_USB_PEAK_BW MBps_to_icc(40)

struct dwc3_acpi_pdata {
	u32			qscratch_base_offset;
	u32			qscratch_base_size;
	u32			dwc3_core_base_size;
	int			hs_phy_irq_index;
	int			dp_hs_phy_irq_index;
	int			dm_hs_phy_irq_index;
	int			ss_phy_irq_index;
	bool			is_urs;
};

struct dwc3_qcom {
	struct device		*dev;
	void __iomem		*qscratch_base;
	struct platform_device	*dwc3;
	struct platform_device	*urs_usb;
	struct clk		**clks;
	int			num_clocks;
	struct reset_control	*resets;

	int			hs_phy_irq;
	int			dp_hs_phy_irq;
	int			dm_hs_phy_irq;
	int			ss_phy_irq;
	enum usb_device_speed	usb2_speed;

	struct extcon_dev	*edev;
	struct extcon_dev	*host_edev;
	struct notifier_block	vbus_nb;
	struct notifier_block	host_nb;

	const struct dwc3_acpi_pdata *acpi_pdata;

	enum usb_dr_mode	mode;
	bool			is_suspended;
	bool			pm_suspended;
	struct icc_path		*icc_path_ddr;
	struct icc_path		*icc_path_apps;
};

static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val)
{
	u32 reg;

	reg = readl(base + offset);
	reg |= val;
	writel(reg, base + offset);

	/* ensure that above write is through */
	readl(base + offset);
}

static inline void dwc3_qcom_clrbits(void __iomem *base, u32 offset, u32 val)
{
	u32 reg;

	reg = readl(base + offset);
	reg &= ~val;
	writel(reg, base + offset);

	/* ensure that above write is through */
	readl(base + offset);
}

static void dwc3_qcom_vbus_override_enable(struct dwc3_qcom *qcom, bool enable)
{
	if (enable) {
		dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
				  LANE0_PWR_PRESENT);
		dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL,
				  UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL);
	} else {
		dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
				  LANE0_PWR_PRESENT);
		dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL,
				  UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL);
	}
}

static int dwc3_qcom_vbus_notifier(struct notifier_block *nb,
				   unsigned long event, void *ptr)
{
	struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, vbus_nb);

	/* enable vbus override for device mode */
	dwc3_qcom_vbus_override_enable(qcom, event);
	qcom->mode = event ? USB_DR_MODE_PERIPHERAL : USB_DR_MODE_HOST;

	return NOTIFY_DONE;
}

static int dwc3_qcom_host_notifier(struct notifier_block *nb,
				   unsigned long event, void *ptr)
{
	struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, host_nb);

	/* disable vbus override in host mode */
	dwc3_qcom_vbus_override_enable(qcom, !event);
	qcom->mode = event ? USB_DR_MODE_HOST : USB_DR_MODE_PERIPHERAL;

	return NOTIFY_DONE;
}

static int dwc3_qcom_register_extcon(struct dwc3_qcom *qcom)
{
	struct device		*dev = qcom->dev;
	struct extcon_dev	*host_edev;
	int			ret;

	if (!of_property_read_bool(dev->of_node, "extcon"))
		return 0;

	qcom->edev = extcon_get_edev_by_phandle(dev, 0);
	if (IS_ERR(qcom->edev))
		return PTR_ERR(qcom->edev);

	qcom->vbus_nb.notifier_call = dwc3_qcom_vbus_notifier;

	qcom->host_edev = extcon_get_edev_by_phandle(dev, 1);
	if (IS_ERR(qcom->host_edev))
		qcom->host_edev = NULL;

	ret = devm_extcon_register_notifier(dev, qcom->edev, EXTCON_USB,
					    &qcom->vbus_nb);
	if (ret < 0) {
		dev_err(dev, "VBUS notifier register failed\n");
		return ret;
	}

	if (qcom->host_edev)
		host_edev = qcom->host_edev;
	else
		host_edev = qcom->edev;

	qcom->host_nb.notifier_call = dwc3_qcom_host_notifier;
	ret = devm_extcon_register_notifier(dev, host_edev, EXTCON_USB_HOST,
					    &qcom->host_nb);
	if (ret < 0) {
		dev_err(dev, "Host notifier register failed\n");
		return ret;
	}

	/* Update initial VBUS override based on extcon state */
	if (extcon_get_state(qcom->edev, EXTCON_USB) ||
	    !extcon_get_state(host_edev, EXTCON_USB_HOST))
		dwc3_qcom_vbus_notifier(&qcom->vbus_nb, true, qcom->edev);
	else
		dwc3_qcom_vbus_notifier(&qcom->vbus_nb, false, qcom->edev);

	return 0;
}

static int dwc3_qcom_interconnect_enable(struct dwc3_qcom *qcom)
{
	int ret;

	ret = icc_enable(qcom->icc_path_ddr);
	if (ret)
		return ret;

	ret = icc_enable(qcom->icc_path_apps);
	if (ret)
		icc_disable(qcom->icc_path_ddr);

	return ret;
}

static int dwc3_qcom_interconnect_disable(struct dwc3_qcom *qcom)
{
	int ret;

	ret = icc_disable(qcom->icc_path_ddr);
	if (ret)
		return ret;

	ret = icc_disable(qcom->icc_path_apps);
	if (ret)
		icc_enable(qcom->icc_path_ddr);

	return ret;
}

/**
 * dwc3_qcom_interconnect_init() - Get interconnect path handles
 * and set bandwidth.
 * @qcom:			Pointer to the concerned usb core.
 *
 */
static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
{
	struct device *dev = qcom->dev;
	int ret;

	if (has_acpi_companion(dev))
		return 0;

	qcom->icc_path_ddr = of_icc_get(dev, "usb-ddr");
	if (IS_ERR(qcom->icc_path_ddr)) {
		dev_err(dev, "failed to get usb-ddr path: %ld\n",
			PTR_ERR(qcom->icc_path_ddr));
		return PTR_ERR(qcom->icc_path_ddr);
	}

	qcom->icc_path_apps = of_icc_get(dev, "apps-usb");
	if (IS_ERR(qcom->icc_path_apps)) {
		dev_err(dev, "failed to get apps-usb path: %ld\n",
				PTR_ERR(qcom->icc_path_apps));
		return PTR_ERR(qcom->icc_path_apps);
	}

	if (usb_get_maximum_speed(&qcom->dwc3->dev) >= USB_SPEED_SUPER ||
			usb_get_maximum_speed(&qcom->dwc3->dev) == USB_SPEED_UNKNOWN)
		ret = icc_set_bw(qcom->icc_path_ddr,
			USB_MEMORY_AVG_SS_BW, USB_MEMORY_PEAK_SS_BW);
	else
		ret = icc_set_bw(qcom->icc_path_ddr,
			USB_MEMORY_AVG_HS_BW, USB_MEMORY_PEAK_HS_BW);

	if (ret) {
		dev_err(dev, "failed to set bandwidth for usb-ddr path: %d\n", ret);
		return ret;
	}

	ret = icc_set_bw(qcom->icc_path_apps,
		APPS_USB_AVG_BW, APPS_USB_PEAK_BW);
	if (ret) {
		dev_err(dev, "failed to set bandwidth for apps-usb path: %d\n", ret);
		return ret;
	}

	return 0;
}

/**
 * dwc3_qcom_interconnect_exit() - Release interconnect path handles
 * @qcom:			Pointer to the concerned usb core.
 *
 * This function is used to release interconnect path handle.
 */
static void dwc3_qcom_interconnect_exit(struct dwc3_qcom *qcom)
{
	icc_put(qcom->icc_path_ddr);
	icc_put(qcom->icc_path_apps);
}

static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
{
	struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
	struct usb_hcd *hcd = platform_get_drvdata(dwc->xhci);
	struct usb_device *udev;

	/*
	 * It is possible to query the speed of all children of
	 * USB2.0 root hub via usb_hub_for_each_child(). DWC3 code
	 * currently supports only 1 port per controller. So
	 * this is sufficient.
	 */
	udev = usb_hub_find_child(hcd->self.root_hub, 1);

	if (!udev)
		return USB_SPEED_UNKNOWN;

	return udev->speed;
}

static void dwc3_qcom_enable_wakeup_irq(int irq, unsigned int polarity)
{
	if (!irq)
		return;

	if (polarity)
		irq_set_irq_type(irq, polarity);

	enable_irq(irq);
	enable_irq_wake(irq);
}

static void dwc3_qcom_disable_wakeup_irq(int irq)
{
	if (!irq)
		return;

	disable_irq_wake(irq);
	disable_irq_nosync(irq);
}

static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
{
	dwc3_qcom_disable_wakeup_irq(qcom->hs_phy_irq);

	if (qcom->usb2_speed == USB_SPEED_LOW) {
		dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
	} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
			(qcom->usb2_speed == USB_SPEED_FULL)) {
		dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
	} else {
		dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
		dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
	}

	dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq);
}

static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
{
	dwc3_qcom_enable_wakeup_irq(qcom->hs_phy_irq, 0);

	/*
	 * Configure DP/DM line interrupts based on the USB2 device attached to
	 * the root hub port. When HS/FS device is connected, configure the DP line
	 * as falling edge to detect both disconnect and remote wakeup scenarios. When
	 * LS device is connected, configure DM line as falling edge to detect both
	 * disconnect and remote wakeup. When no device is connected, configure both
	 * DP and DM lines as rising edge to detect HS/HS/LS device connect scenario.
	 */

	if (qcom->usb2_speed == USB_SPEED_LOW) {
		dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
						IRQ_TYPE_EDGE_FALLING);
	} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
			(qcom->usb2_speed == USB_SPEED_FULL)) {
		dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
						IRQ_TYPE_EDGE_FALLING);
	} else {
		dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
						IRQ_TYPE_EDGE_RISING);
		dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
						IRQ_TYPE_EDGE_RISING);
	}

	dwc3_qcom_enable_wakeup_irq(qcom->ss_phy_irq, 0);
}

static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
{
	u32 val;
	int i, ret;

	if (qcom->is_suspended)
		return 0;

	val = readl(qcom->qscratch_base + PWR_EVNT_IRQ_STAT_REG);
	if (!(val & PWR_EVNT_LPM_IN_L2_MASK))
		dev_err(qcom->dev, "HS-PHY not in L2\n");

	for (i = qcom->num_clocks - 1; i >= 0; i--)
		clk_disable_unprepare(qcom->clks[i]);

	ret = dwc3_qcom_interconnect_disable(qcom);
	if (ret)
		dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret);

	if (device_may_wakeup(qcom->dev)) {
		qcom->usb2_speed = dwc3_qcom_read_usb2_speed(qcom);
		dwc3_qcom_enable_interrupts(qcom);
	}

	qcom->is_suspended = true;

	return 0;
}

static int dwc3_qcom_resume(struct dwc3_qcom *qcom)
{
	int ret;
	int i;

	if (!qcom->is_suspended)
		return 0;

	if (device_may_wakeup(qcom->dev))
		dwc3_qcom_disable_interrupts(qcom);

	for (i = 0; i < qcom->num_clocks; i++) {
		ret = clk_prepare_enable(qcom->clks[i]);
		if (ret < 0) {
			while (--i >= 0)
				clk_disable_unprepare(qcom->clks[i]);
			return ret;
		}
	}

	ret = dwc3_qcom_interconnect_enable(qcom);
	if (ret)
		dev_warn(qcom->dev, "failed to enable interconnect: %d\n", ret);

	/* Clear existing events from PHY related to L2 in/out */
	dwc3_qcom_setbits(qcom->qscratch_base, PWR_EVNT_IRQ_STAT_REG,
			  PWR_EVNT_LPM_IN_L2_MASK | PWR_EVNT_LPM_OUT_L2_MASK);

	qcom->is_suspended = false;

	return 0;
}

static irqreturn_t qcom_dwc3_resume_irq(int irq, void *data)
{
	struct dwc3_qcom *qcom = data;
	struct dwc3	*dwc = platform_get_drvdata(qcom->dwc3);

	/* If pm_suspended then let pm_resume take care of resuming h/w */
	if (qcom->pm_suspended)
		return IRQ_HANDLED;

	if (dwc->xhci)
		pm_runtime_resume(&dwc->xhci->dev);

	return IRQ_HANDLED;
}

static void dwc3_qcom_select_utmi_clk(struct dwc3_qcom *qcom)
{
	/* Configure dwc3 to use UTMI clock as PIPE clock not present */
	dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
			  PIPE_UTMI_CLK_DIS);

	usleep_range(100, 1000);

	dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
			  PIPE_UTMI_CLK_SEL | PIPE3_PHYSTATUS_SW);

	usleep_range(100, 1000);

	dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
			  PIPE_UTMI_CLK_DIS);
}

static int dwc3_qcom_get_irq(struct platform_device *pdev,
			     const char *name, int num)
{
	struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
	struct platform_device *pdev_irq = qcom->urs_usb ? qcom->urs_usb : pdev;
	struct device_node *np = pdev->dev.of_node;
	int ret;

	if (np)
		ret = platform_get_irq_byname_optional(pdev_irq, name);
	else
		ret = platform_get_irq_optional(pdev_irq, num);

	return ret;
}

static int dwc3_qcom_setup_irq(struct platform_device *pdev)
{
	struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
	const struct dwc3_acpi_pdata *pdata = qcom->acpi_pdata;
	int irq;
	int ret;

	irq = dwc3_qcom_get_irq(pdev, "hs_phy_irq",
				pdata ? pdata->hs_phy_irq_index : -1);
	if (irq > 0) {
		/* Keep wakeup interrupts disabled until suspend */
		irq_set_status_flags(irq, IRQ_NOAUTOEN);
		ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
					qcom_dwc3_resume_irq,
					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
					"qcom_dwc3 HS", qcom);
		if (ret) {
			dev_err(qcom->dev, "hs_phy_irq failed: %d\n", ret);
			return ret;
		}
		qcom->hs_phy_irq = irq;
	}

	irq = dwc3_qcom_get_irq(pdev, "dp_hs_phy_irq",
				pdata ? pdata->dp_hs_phy_irq_index : -1);
	if (irq > 0) {
		irq_set_status_flags(irq, IRQ_NOAUTOEN);
		ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
					qcom_dwc3_resume_irq,
					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
					"qcom_dwc3 DP_HS", qcom);
		if (ret) {
			dev_err(qcom->dev, "dp_hs_phy_irq failed: %d\n", ret);
			return ret;
		}
		qcom->dp_hs_phy_irq = irq;
	}

	irq = dwc3_qcom_get_irq(pdev, "dm_hs_phy_irq",
				pdata ? pdata->dm_hs_phy_irq_index : -1);
	if (irq > 0) {
		irq_set_status_flags(irq, IRQ_NOAUTOEN);
		ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
					qcom_dwc3_resume_irq,
					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
					"qcom_dwc3 DM_HS", qcom);
		if (ret) {
			dev_err(qcom->dev, "dm_hs_phy_irq failed: %d\n", ret);
			return ret;
		}
		qcom->dm_hs_phy_irq = irq;
	}

	irq = dwc3_qcom_get_irq(pdev, "ss_phy_irq",
				pdata ? pdata->ss_phy_irq_index : -1);
	if (irq > 0) {
		irq_set_status_flags(irq, IRQ_NOAUTOEN);
		ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
					qcom_dwc3_resume_irq,
					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
					"qcom_dwc3 SS", qcom);
		if (ret) {
			dev_err(qcom->dev, "ss_phy_irq failed: %d\n", ret);
			return ret;
		}
		qcom->ss_phy_irq = irq;
	}

	return 0;
}

static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count)
{
	struct device		*dev = qcom->dev;
	struct device_node	*np = dev->of_node;
	int			i;

	if (!np || !count)
		return 0;

	if (count < 0)
		return count;

	qcom->num_clocks = count;

	qcom->clks = devm_kcalloc(dev, qcom->num_clocks,
				  sizeof(struct clk *), GFP_KERNEL);
	if (!qcom->clks)
		return -ENOMEM;

	for (i = 0; i < qcom->num_clocks; i++) {
		struct clk	*clk;
		int		ret;

		clk = of_clk_get(np, i);
		if (IS_ERR(clk)) {
			while (--i >= 0)
				clk_put(qcom->clks[i]);
			return PTR_ERR(clk);
		}

		ret = clk_prepare_enable(clk);
		if (ret < 0) {
			while (--i >= 0) {
				clk_disable_unprepare(qcom->clks[i]);
				clk_put(qcom->clks[i]);
			}
			clk_put(clk);

			return ret;
		}

		qcom->clks[i] = clk;
	}

	return 0;
}

static const struct property_entry dwc3_qcom_acpi_properties[] = {
	PROPERTY_ENTRY_STRING("dr_mode", "host"),
	{}
};

static const struct software_node dwc3_qcom_swnode = {
	.properties = dwc3_qcom_acpi_properties,
};

static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
{
	struct dwc3_qcom	*qcom = platform_get_drvdata(pdev);
	struct device		*dev = &pdev->dev;
	struct resource		*res, *child_res = NULL;
	struct platform_device	*pdev_irq = qcom->urs_usb ? qcom->urs_usb :
							    pdev;
	int			irq;
	int			ret;

	qcom->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
	if (!qcom->dwc3)
		return -ENOMEM;

	qcom->dwc3->dev.parent = dev;
	qcom->dwc3->dev.type = dev->type;
	qcom->dwc3->dev.dma_mask = dev->dma_mask;
	qcom->dwc3->dev.dma_parms = dev->dma_parms;
	qcom->dwc3->dev.coherent_dma_mask = dev->coherent_dma_mask;

	child_res = kcalloc(2, sizeof(*child_res), GFP_KERNEL);
	if (!child_res) {
		platform_device_put(qcom->dwc3);
		return -ENOMEM;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "failed to get memory resource\n");
		ret = -ENODEV;
		goto out;
	}

	child_res[0].flags = res->flags;
	child_res[0].start = res->start;
	child_res[0].end = child_res[0].start +
		qcom->acpi_pdata->dwc3_core_base_size;

	irq = platform_get_irq(pdev_irq, 0);
	if (irq < 0) {
		ret = irq;
		goto out;
	}
	child_res[1].flags = IORESOURCE_IRQ;
	child_res[1].start = child_res[1].end = irq;

	ret = platform_device_add_resources(qcom->dwc3, child_res, 2);
	if (ret) {
		dev_err(&pdev->dev, "failed to add resources\n");
		goto out;
	}

	ret = device_add_software_node(&qcom->dwc3->dev, &dwc3_qcom_swnode);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to add properties\n");
		goto out;
	}

	ret = platform_device_add(qcom->dwc3);
	if (ret) {
		dev_err(&pdev->dev, "failed to add device\n");
		device_remove_software_node(&qcom->dwc3->dev);
		goto out;
	}
	kfree(child_res);
	return 0;

out:
	platform_device_put(qcom->dwc3);
	kfree(child_res);
	return ret;
}

static int dwc3_qcom_of_register_core(struct platform_device *pdev)
{
	struct dwc3_qcom	*qcom = platform_get_drvdata(pdev);
	struct device_node	*np = pdev->dev.of_node, *dwc3_np;
	struct device		*dev = &pdev->dev;
	int			ret;

	dwc3_np = of_get_compatible_child(np, "snps,dwc3");
	if (!dwc3_np) {
		dev_err(dev, "failed to find dwc3 core child\n");
		return -ENODEV;
	}

	ret = of_platform_populate(np, NULL, NULL, dev);
	if (ret) {
		dev_err(dev, "failed to register dwc3 core - %d\n", ret);
		goto node_put;
	}

	qcom->dwc3 = of_find_device_by_node(dwc3_np);
	if (!qcom->dwc3) {
		ret = -ENODEV;
		dev_err(dev, "failed to get dwc3 platform device\n");
	}

node_put:
	of_node_put(dwc3_np);

	return ret;
}

static struct platform_device *
dwc3_qcom_create_urs_usb_platdev(struct device *dev)
{
	struct fwnode_handle *fwh;
	struct acpi_device *adev;
	char name[8];
	int ret;
	int id;

	/* Figure out device id */
	ret = sscanf(fwnode_get_name(dev->fwnode), "URS%d", &id);
	if (!ret)
		return NULL;

	/* Find the child using name */
	snprintf(name, sizeof(name), "USB%d", id);
	fwh = fwnode_get_named_child_node(dev->fwnode, name);
	if (!fwh)
		return NULL;

	adev = to_acpi_device_node(fwh);
	if (!adev)
		return NULL;

	return acpi_create_platform_device(adev, NULL);
}

static int dwc3_qcom_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct device *dev = &pdev->dev;
	struct dwc3_qcom *qcom;
	struct resource	*res, *parent_res = NULL;
	int ret, i;
	bool ignore_pipe_clk;
	struct generic_pm_domain *genpd;

	qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL);
	if (!qcom)
		return -ENOMEM;

	platform_set_drvdata(pdev, qcom);
	qcom->dev = &pdev->dev;

	genpd = pd_to_genpd(qcom->dev->pm_domain);

	if (has_acpi_companion(dev)) {
		qcom->acpi_pdata = acpi_device_get_match_data(dev);
		if (!qcom->acpi_pdata) {
			dev_err(&pdev->dev, "no supporting ACPI device data\n");
			return -EINVAL;
		}
	}

	qcom->resets = devm_reset_control_array_get_optional_exclusive(dev);
	if (IS_ERR(qcom->resets)) {
		ret = PTR_ERR(qcom->resets);
		dev_err(&pdev->dev, "failed to get resets, err=%d\n", ret);
		return ret;
	}

	ret = reset_control_assert(qcom->resets);
	if (ret) {
		dev_err(&pdev->dev, "failed to assert resets, err=%d\n", ret);
		return ret;
	}

	usleep_range(10, 1000);

	ret = reset_control_deassert(qcom->resets);
	if (ret) {
		dev_err(&pdev->dev, "failed to deassert resets, err=%d\n", ret);
		goto reset_assert;
	}

	ret = dwc3_qcom_clk_init(qcom, of_clk_get_parent_count(np));
	if (ret) {
		dev_err(dev, "failed to get clocks\n");
		goto reset_assert;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (np) {
		parent_res = res;
	} else {
		parent_res = kmemdup(res, sizeof(struct resource), GFP_KERNEL);
		if (!parent_res)
			return -ENOMEM;

		parent_res->start = res->start +
			qcom->acpi_pdata->qscratch_base_offset;
		parent_res->end = parent_res->start +
			qcom->acpi_pdata->qscratch_base_size;

		if (qcom->acpi_pdata->is_urs) {
			qcom->urs_usb = dwc3_qcom_create_urs_usb_platdev(dev);
			if (IS_ERR_OR_NULL(qcom->urs_usb)) {
				dev_err(dev, "failed to create URS USB platdev\n");
				if (!qcom->urs_usb)
					return -ENODEV;
				else
					return PTR_ERR(qcom->urs_usb);
			}
		}
	}

	qcom->qscratch_base = devm_ioremap_resource(dev, parent_res);
	if (IS_ERR(qcom->qscratch_base)) {
		ret = PTR_ERR(qcom->qscratch_base);
		goto clk_disable;
	}

	ret = dwc3_qcom_setup_irq(pdev);
	if (ret) {
		dev_err(dev, "failed to setup IRQs, err=%d\n", ret);
		goto clk_disable;
	}

	/*
	 * Disable pipe_clk requirement if specified. Used when dwc3
	 * operates without SSPHY and only HS/FS/LS modes are supported.
	 */
	ignore_pipe_clk = device_property_read_bool(dev,
				"qcom,select-utmi-as-pipe-clk");
	if (ignore_pipe_clk)
		dwc3_qcom_select_utmi_clk(qcom);

	if (np)
		ret = dwc3_qcom_of_register_core(pdev);
	else
		ret = dwc3_qcom_acpi_register_core(pdev);

	if (ret) {
		dev_err(dev, "failed to register DWC3 Core, err=%d\n", ret);
		goto depopulate;
	}

	ret = dwc3_qcom_interconnect_init(qcom);
	if (ret)
		goto depopulate;

	qcom->mode = usb_get_dr_mode(&qcom->dwc3->dev);

	/* enable vbus override for device mode */
	if (qcom->mode == USB_DR_MODE_PERIPHERAL)
		dwc3_qcom_vbus_override_enable(qcom, true);

	/* register extcon to override sw_vbus on Vbus change later */
	ret = dwc3_qcom_register_extcon(qcom);
	if (ret)
		goto interconnect_exit;

	if (device_can_wakeup(&qcom->dwc3->dev)) {
		/*
		 * Setting GENPD_FLAG_ALWAYS_ON flag takes care of keeping
		 * genpd on in both runtime suspend and system suspend cases.
		 */
		genpd->flags |= GENPD_FLAG_ALWAYS_ON;
		device_init_wakeup(&pdev->dev, true);
	} else {
		genpd->flags |= GENPD_FLAG_RPM_ALWAYS_ON;
	}

	qcom->is_suspended = false;
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	pm_runtime_forbid(dev);

	return 0;

interconnect_exit:
	dwc3_qcom_interconnect_exit(qcom);
depopulate:
	if (np)
		of_platform_depopulate(&pdev->dev);
	else
		platform_device_put(pdev);
clk_disable:
	for (i = qcom->num_clocks - 1; i >= 0; i--) {
		clk_disable_unprepare(qcom->clks[i]);
		clk_put(qcom->clks[i]);
	}
reset_assert:
	reset_control_assert(qcom->resets);

	return ret;
}

static int dwc3_qcom_remove(struct platform_device *pdev)
{
	struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
	struct device *dev = &pdev->dev;
	int i;

	device_remove_software_node(&qcom->dwc3->dev);
	of_platform_depopulate(dev);

	for (i = qcom->num_clocks - 1; i >= 0; i--) {
		clk_disable_unprepare(qcom->clks[i]);
		clk_put(qcom->clks[i]);
	}
	qcom->num_clocks = 0;

	dwc3_qcom_interconnect_exit(qcom);
	reset_control_assert(qcom->resets);

	pm_runtime_allow(dev);
	pm_runtime_disable(dev);

	return 0;
}

static int __maybe_unused dwc3_qcom_pm_suspend(struct device *dev)
{
	struct dwc3_qcom *qcom = dev_get_drvdata(dev);
	int ret = 0;

	ret = dwc3_qcom_suspend(qcom);
	if (!ret)
		qcom->pm_suspended = true;

	return ret;
}

static int __maybe_unused dwc3_qcom_pm_resume(struct device *dev)
{
	struct dwc3_qcom *qcom = dev_get_drvdata(dev);
	int ret;

	ret = dwc3_qcom_resume(qcom);
	if (!ret)
		qcom->pm_suspended = false;

	return ret;
}

static int __maybe_unused dwc3_qcom_runtime_suspend(struct device *dev)
{
	struct dwc3_qcom *qcom = dev_get_drvdata(dev);

	return dwc3_qcom_suspend(qcom);
}

static int __maybe_unused dwc3_qcom_runtime_resume(struct device *dev)
{
	struct dwc3_qcom *qcom = dev_get_drvdata(dev);

	return dwc3_qcom_resume(qcom);
}

static const struct dev_pm_ops dwc3_qcom_dev_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(dwc3_qcom_pm_suspend, dwc3_qcom_pm_resume)
	SET_RUNTIME_PM_OPS(dwc3_qcom_runtime_suspend, dwc3_qcom_runtime_resume,
			   NULL)
};

static const struct of_device_id dwc3_qcom_of_match[] = {
	{ .compatible = "qcom,dwc3" },
	{ .compatible = "qcom,msm8996-dwc3" },
	{ .compatible = "qcom,msm8998-dwc3" },
	{ .compatible = "qcom,sdm660-dwc3" },
	{ .compatible = "qcom,sdm845-dwc3" },
	{ }
};
MODULE_DEVICE_TABLE(of, dwc3_qcom_of_match);

#ifdef CONFIG_ACPI
static const struct dwc3_acpi_pdata sdm845_acpi_pdata = {
	.qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
	.qscratch_base_size = SDM845_QSCRATCH_SIZE,
	.dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
	.hs_phy_irq_index = 1,
	.dp_hs_phy_irq_index = 4,
	.dm_hs_phy_irq_index = 3,
	.ss_phy_irq_index = 2
};

static const struct dwc3_acpi_pdata sdm845_acpi_urs_pdata = {
	.qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
	.qscratch_base_size = SDM845_QSCRATCH_SIZE,
	.dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
	.hs_phy_irq_index = 1,
	.dp_hs_phy_irq_index = 4,
	.dm_hs_phy_irq_index = 3,
	.ss_phy_irq_index = 2,
	.is_urs = true,
};

static const struct acpi_device_id dwc3_qcom_acpi_match[] = {
	{ "QCOM2430", (unsigned long)&sdm845_acpi_pdata },
	{ "QCOM0304", (unsigned long)&sdm845_acpi_urs_pdata },
	{ "QCOM0497", (unsigned long)&sdm845_acpi_urs_pdata },
	{ "QCOM04A6", (unsigned long)&sdm845_acpi_pdata },
	{ },
};
MODULE_DEVICE_TABLE(acpi, dwc3_qcom_acpi_match);
#endif

static struct platform_driver dwc3_qcom_driver = {
	.probe		= dwc3_qcom_probe,
	.remove		= dwc3_qcom_remove,
	.driver		= {
		.name	= "dwc3-qcom",
		.pm	= &dwc3_qcom_dev_pm_ops,
		.of_match_table	= dwc3_qcom_of_match,
		.acpi_match_table = ACPI_PTR(dwc3_qcom_acpi_match),
	},
};

module_platform_driver(dwc3_qcom_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare DWC3 QCOM Glue Driver");