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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2014-2022, NVIDIA CORPORATION. All rights reserved.
4 */
5
6#include <linux/delay.h>
7#include <linux/io.h>
8#include <linux/mailbox_client.h>
9#include <linux/module.h>
10#include <linux/of.h>
11#include <linux/of_platform.h>
12#include <linux/phy/phy.h>
13#include <linux/phy/tegra/xusb.h>
14#include <linux/platform_device.h>
15#include <linux/regulator/consumer.h>
16#include <linux/reset.h>
17#include <linux/slab.h>
18#include <linux/workqueue.h>
19
20#include <soc/tegra/fuse.h>
21
22#include "xusb.h"
23
24static struct phy *tegra_xusb_pad_of_xlate(struct device *dev,
25 struct of_phandle_args *args)
26{
27 struct tegra_xusb_pad *pad = dev_get_drvdata(dev);
28 struct phy *phy = NULL;
29 unsigned int i;
30
31 if (args->args_count != 0)
32 return ERR_PTR(-EINVAL);
33
34 for (i = 0; i < pad->soc->num_lanes; i++) {
35 if (!pad->lanes[i])
36 continue;
37
38 if (pad->lanes[i]->dev.of_node == args->np) {
39 phy = pad->lanes[i];
40 break;
41 }
42 }
43
44 if (phy == NULL)
45 phy = ERR_PTR(-ENODEV);
46
47 return phy;
48}
49
50static const struct of_device_id tegra_xusb_padctl_of_match[] = {
51#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
52 {
53 .compatible = "nvidia,tegra124-xusb-padctl",
54 .data = &tegra124_xusb_padctl_soc,
55 },
56#endif
57#if defined(CONFIG_ARCH_TEGRA_210_SOC)
58 {
59 .compatible = "nvidia,tegra210-xusb-padctl",
60 .data = &tegra210_xusb_padctl_soc,
61 },
62#endif
63#if defined(CONFIG_ARCH_TEGRA_186_SOC)
64 {
65 .compatible = "nvidia,tegra186-xusb-padctl",
66 .data = &tegra186_xusb_padctl_soc,
67 },
68#endif
69#if defined(CONFIG_ARCH_TEGRA_194_SOC)
70 {
71 .compatible = "nvidia,tegra194-xusb-padctl",
72 .data = &tegra194_xusb_padctl_soc,
73 },
74#endif
75#if defined(CONFIG_ARCH_TEGRA_234_SOC)
76 {
77 .compatible = "nvidia,tegra234-xusb-padctl",
78 .data = &tegra234_xusb_padctl_soc,
79 },
80#endif
81 { }
82};
83MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
84
85static struct device_node *
86tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
87{
88 struct device_node *pads, *np;
89
90 pads = of_get_child_by_name(padctl->dev->of_node, "pads");
91 if (!pads)
92 return NULL;
93
94 np = of_get_child_by_name(pads, name);
95 of_node_put(pads);
96
97 return np;
98}
99
100static struct device_node *
101tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
102{
103 struct device_node *np, *lanes;
104
105 lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
106 if (!lanes)
107 return NULL;
108
109 np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
110 of_node_put(lanes);
111
112 return np;
113}
114
115int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
116 struct device_node *np)
117{
118 struct device *dev = &lane->pad->dev;
119 const char *function;
120 int err;
121
122 err = of_property_read_string(np, "nvidia,function", &function);
123 if (err < 0)
124 return err;
125
126 err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
127 if (err < 0) {
128 dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
129 function, np);
130 return err;
131 }
132
133 lane->function = err;
134
135 return 0;
136}
137
138static void tegra_xusb_lane_destroy(struct phy *phy)
139{
140 if (phy) {
141 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
142
143 lane->pad->ops->remove(lane);
144 phy_destroy(phy);
145 }
146}
147
148static void tegra_xusb_pad_release(struct device *dev)
149{
150 struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
151
152 pad->soc->ops->remove(pad);
153}
154
155static const struct device_type tegra_xusb_pad_type = {
156 .release = tegra_xusb_pad_release,
157};
158
159int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
160 struct tegra_xusb_padctl *padctl,
161 struct device_node *np)
162{
163 int err;
164
165 device_initialize(&pad->dev);
166 INIT_LIST_HEAD(&pad->list);
167 pad->dev.parent = padctl->dev;
168 pad->dev.type = &tegra_xusb_pad_type;
169 pad->dev.of_node = np;
170 pad->padctl = padctl;
171
172 err = dev_set_name(&pad->dev, "%s", pad->soc->name);
173 if (err < 0)
174 goto unregister;
175
176 err = device_add(&pad->dev);
177 if (err < 0)
178 goto unregister;
179
180 return 0;
181
182unregister:
183 device_unregister(&pad->dev);
184 return err;
185}
186
187int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
188 const struct phy_ops *ops)
189{
190 struct device_node *children;
191 struct phy *lane;
192 unsigned int i;
193 int err;
194
195 children = of_get_child_by_name(pad->dev.of_node, "lanes");
196 if (!children)
197 return -ENODEV;
198
199 pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
200 GFP_KERNEL);
201 if (!pad->lanes) {
202 of_node_put(children);
203 return -ENOMEM;
204 }
205
206 for (i = 0; i < pad->soc->num_lanes; i++) {
207 struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i);
208 struct tegra_xusb_lane *lane;
209
210 /* skip disabled lanes */
211 if (!np || !of_device_is_available(np)) {
212 of_node_put(np);
213 continue;
214 }
215
216 pad->lanes[i] = phy_create(&pad->dev, np, ops);
217 if (IS_ERR(pad->lanes[i])) {
218 err = PTR_ERR(pad->lanes[i]);
219 of_node_put(np);
220 goto remove;
221 }
222
223 lane = pad->ops->probe(pad, np, i);
224 if (IS_ERR(lane)) {
225 phy_destroy(pad->lanes[i]);
226 err = PTR_ERR(lane);
227 goto remove;
228 }
229
230 list_add_tail(&lane->list, &pad->padctl->lanes);
231 phy_set_drvdata(pad->lanes[i], lane);
232 }
233
234 pad->provider = of_phy_provider_register_full(&pad->dev, children,
235 tegra_xusb_pad_of_xlate);
236 if (IS_ERR(pad->provider)) {
237 err = PTR_ERR(pad->provider);
238 goto remove;
239 }
240
241 return 0;
242
243remove:
244 while (i--)
245 tegra_xusb_lane_destroy(pad->lanes[i]);
246
247 of_node_put(children);
248
249 return err;
250}
251
252void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
253{
254 unsigned int i = pad->soc->num_lanes;
255
256 of_phy_provider_unregister(pad->provider);
257
258 while (i--)
259 tegra_xusb_lane_destroy(pad->lanes[i]);
260
261 device_unregister(&pad->dev);
262}
263
264static struct tegra_xusb_pad *
265tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
266 const struct tegra_xusb_pad_soc *soc)
267{
268 struct tegra_xusb_pad *pad;
269 struct device_node *np;
270 int err;
271
272 np = tegra_xusb_find_pad_node(padctl, soc->name);
273 if (!np || !of_device_is_available(np))
274 return NULL;
275
276 pad = soc->ops->probe(padctl, soc, np);
277 if (IS_ERR(pad)) {
278 err = PTR_ERR(pad);
279 dev_err(padctl->dev, "failed to create pad %s: %d\n",
280 soc->name, err);
281 return ERR_PTR(err);
282 }
283
284 /* XXX move this into ->probe() to avoid string comparison */
285 if (strcmp(soc->name, "pcie") == 0)
286 padctl->pcie = pad;
287
288 if (strcmp(soc->name, "sata") == 0)
289 padctl->sata = pad;
290
291 if (strcmp(soc->name, "usb2") == 0)
292 padctl->usb2 = pad;
293
294 if (strcmp(soc->name, "ulpi") == 0)
295 padctl->ulpi = pad;
296
297 if (strcmp(soc->name, "hsic") == 0)
298 padctl->hsic = pad;
299
300 return pad;
301}
302
303static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
304{
305 struct tegra_xusb_pad *pad, *tmp;
306
307 list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
308 list_del(&pad->list);
309 tegra_xusb_pad_unregister(pad);
310 }
311}
312
313static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
314{
315 mutex_lock(&padctl->lock);
316 __tegra_xusb_remove_pads(padctl);
317 mutex_unlock(&padctl->lock);
318}
319
320static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
321{
322 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
323 const struct tegra_xusb_lane_soc *soc = lane->soc;
324 u32 value;
325
326 /* skip single function lanes */
327 if (soc->num_funcs < 2)
328 return;
329
330 if (lane->pad->ops->iddq_enable)
331 lane->pad->ops->iddq_enable(lane);
332
333 /* choose function */
334 value = padctl_readl(padctl, soc->offset);
335 value &= ~(soc->mask << soc->shift);
336 value |= lane->function << soc->shift;
337 padctl_writel(padctl, value, soc->offset);
338
339 if (lane->pad->ops->iddq_disable)
340 lane->pad->ops->iddq_disable(lane);
341}
342
343static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
344{
345 unsigned int i;
346
347 for (i = 0; i < pad->soc->num_lanes; i++) {
348 struct tegra_xusb_lane *lane;
349
350 if (pad->lanes[i]) {
351 lane = phy_get_drvdata(pad->lanes[i]);
352 tegra_xusb_lane_program(lane);
353 }
354 }
355}
356
357static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
358{
359 struct tegra_xusb_pad *pad;
360 unsigned int i;
361
362 mutex_lock(&padctl->lock);
363
364 for (i = 0; i < padctl->soc->num_pads; i++) {
365 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
366 int err;
367
368 pad = tegra_xusb_pad_create(padctl, soc);
369 if (IS_ERR(pad)) {
370 err = PTR_ERR(pad);
371 dev_err(padctl->dev, "failed to create pad %s: %d\n",
372 soc->name, err);
373 __tegra_xusb_remove_pads(padctl);
374 mutex_unlock(&padctl->lock);
375 return err;
376 }
377
378 if (!pad)
379 continue;
380
381 list_add_tail(&pad->list, &padctl->pads);
382 }
383
384 list_for_each_entry(pad, &padctl->pads, list)
385 tegra_xusb_pad_program(pad);
386
387 mutex_unlock(&padctl->lock);
388 return 0;
389}
390
391bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
392 const char *function)
393{
394 const char *func = lane->soc->funcs[lane->function];
395
396 return strcmp(function, func) == 0;
397}
398
399struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
400 const char *type,
401 unsigned int index)
402{
403 struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
404 char *name;
405
406 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
407 if (!name)
408 return ERR_PTR(-ENOMEM);
409
410 list_for_each_entry(lane, &padctl->lanes, list) {
411 if (strcmp(lane->soc->name, name) == 0) {
412 hit = lane;
413 break;
414 }
415 }
416
417 kfree(name);
418 return hit;
419}
420
421struct tegra_xusb_lane *
422tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
423 const struct tegra_xusb_lane_map *map,
424 const char *function)
425{
426 struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
427
428 for (; map->type; map++) {
429 if (port->index != map->port)
430 continue;
431
432 lane = tegra_xusb_find_lane(port->padctl, map->type,
433 map->index);
434 if (IS_ERR(lane))
435 continue;
436
437 if (!tegra_xusb_lane_check(lane, function))
438 continue;
439
440 if (!IS_ERR(match))
441 dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
442 map->type, map->index, match->soc->name);
443 else
444 match = lane;
445 }
446
447 return match;
448}
449
450static struct device_node *
451tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
452 unsigned int index)
453{
454 struct device_node *ports, *np;
455 char *name;
456
457 ports = of_get_child_by_name(padctl->dev->of_node, "ports");
458 if (!ports)
459 return NULL;
460
461 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
462 if (!name) {
463 of_node_put(ports);
464 return NULL;
465 }
466 np = of_get_child_by_name(ports, name);
467 kfree(name);
468 of_node_put(ports);
469
470 return np;
471}
472
473struct tegra_xusb_port *
474tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
475 unsigned int index)
476{
477 struct tegra_xusb_port *port;
478 struct device_node *np;
479
480 np = tegra_xusb_find_port_node(padctl, type, index);
481 if (!np)
482 return NULL;
483
484 list_for_each_entry(port, &padctl->ports, list) {
485 if (np == port->dev.of_node) {
486 of_node_put(np);
487 return port;
488 }
489 }
490
491 of_node_put(np);
492
493 return NULL;
494}
495
496struct tegra_xusb_usb2_port *
497tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
498{
499 struct tegra_xusb_port *port;
500
501 port = tegra_xusb_find_port(padctl, "usb2", index);
502 if (port)
503 return to_usb2_port(port);
504
505 return NULL;
506}
507
508struct tegra_xusb_usb3_port *
509tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
510{
511 struct tegra_xusb_port *port;
512
513 port = tegra_xusb_find_port(padctl, "usb3", index);
514 if (port)
515 return to_usb3_port(port);
516
517 return NULL;
518}
519
520static void tegra_xusb_port_release(struct device *dev)
521{
522 struct tegra_xusb_port *port = to_tegra_xusb_port(dev);
523
524 if (port->ops->release)
525 port->ops->release(port);
526}
527
528static const struct device_type tegra_xusb_port_type = {
529 .release = tegra_xusb_port_release,
530};
531
532static int tegra_xusb_port_init(struct tegra_xusb_port *port,
533 struct tegra_xusb_padctl *padctl,
534 struct device_node *np,
535 const char *name,
536 unsigned int index)
537{
538 int err;
539
540 INIT_LIST_HEAD(&port->list);
541 port->padctl = padctl;
542 port->index = index;
543
544 device_initialize(&port->dev);
545 port->dev.type = &tegra_xusb_port_type;
546 port->dev.of_node = of_node_get(np);
547 port->dev.parent = padctl->dev;
548
549 err = dev_set_name(&port->dev, "%s-%u", name, index);
550 if (err < 0)
551 goto unregister;
552
553 err = device_add(&port->dev);
554 if (err < 0)
555 goto unregister;
556
557 return 0;
558
559unregister:
560 device_unregister(&port->dev);
561 return err;
562}
563
564static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
565{
566 if (!IS_ERR_OR_NULL(port->usb_role_sw)) {
567 of_platform_depopulate(&port->dev);
568 usb_role_switch_unregister(port->usb_role_sw);
569 cancel_work_sync(&port->usb_phy_work);
570 usb_remove_phy(&port->usb_phy);
571 port->usb_phy.dev->driver = NULL;
572 }
573
574 if (port->ops->remove)
575 port->ops->remove(port);
576
577 device_unregister(&port->dev);
578}
579
580static const char *const modes[] = {
581 [USB_DR_MODE_UNKNOWN] = "",
582 [USB_DR_MODE_HOST] = "host",
583 [USB_DR_MODE_PERIPHERAL] = "peripheral",
584 [USB_DR_MODE_OTG] = "otg",
585};
586
587static const char * const usb_roles[] = {
588 [USB_ROLE_NONE] = "none",
589 [USB_ROLE_HOST] = "host",
590 [USB_ROLE_DEVICE] = "device",
591};
592
593static enum usb_phy_events to_usb_phy_event(enum usb_role role)
594{
595 switch (role) {
596 case USB_ROLE_DEVICE:
597 return USB_EVENT_VBUS;
598
599 case USB_ROLE_HOST:
600 return USB_EVENT_ID;
601
602 default:
603 return USB_EVENT_NONE;
604 }
605}
606
607static void tegra_xusb_usb_phy_work(struct work_struct *work)
608{
609 struct tegra_xusb_port *port = container_of(work,
610 struct tegra_xusb_port,
611 usb_phy_work);
612 enum usb_role role = usb_role_switch_get_role(port->usb_role_sw);
613
614 usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role));
615
616 dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__,
617 usb_roles[role]);
618
619 atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy);
620}
621
622static int tegra_xusb_role_sw_set(struct usb_role_switch *sw,
623 enum usb_role role)
624{
625 struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw);
626
627 dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]);
628
629 schedule_work(&port->usb_phy_work);
630
631 return 0;
632}
633
634static int tegra_xusb_set_peripheral(struct usb_otg *otg,
635 struct usb_gadget *gadget)
636{
637 struct tegra_xusb_port *port = container_of(otg->usb_phy,
638 struct tegra_xusb_port,
639 usb_phy);
640
641 if (gadget != NULL)
642 schedule_work(&port->usb_phy_work);
643
644 return 0;
645}
646
647static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host)
648{
649 struct tegra_xusb_port *port = container_of(otg->usb_phy,
650 struct tegra_xusb_port,
651 usb_phy);
652
653 if (host != NULL)
654 schedule_work(&port->usb_phy_work);
655
656 return 0;
657}
658
659
660static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port)
661{
662 struct tegra_xusb_lane *lane;
663 struct usb_role_switch_desc role_sx_desc = {
664 .fwnode = dev_fwnode(&port->dev),
665 .set = tegra_xusb_role_sw_set,
666 .allow_userspace_control = true,
667 };
668 int err = 0;
669
670 /*
671 * USB role switch driver needs parent driver owner info. This is a
672 * suboptimal solution. TODO: Need to revisit this in a follow-up patch
673 * where an optimal solution is possible with changes to USB role
674 * switch driver.
675 */
676 port->dev.driver = devm_kzalloc(&port->dev,
677 sizeof(struct device_driver),
678 GFP_KERNEL);
679 if (!port->dev.driver)
680 return -ENOMEM;
681
682 port->dev.driver->owner = THIS_MODULE;
683
684 port->usb_role_sw = usb_role_switch_register(&port->dev,
685 &role_sx_desc);
686 if (IS_ERR(port->usb_role_sw)) {
687 err = PTR_ERR(port->usb_role_sw);
688 dev_err(&port->dev, "failed to register USB role switch: %d",
689 err);
690 return err;
691 }
692
693 INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work);
694 usb_role_switch_set_drvdata(port->usb_role_sw, port);
695
696 port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg),
697 GFP_KERNEL);
698 if (!port->usb_phy.otg)
699 return -ENOMEM;
700
701 lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index);
702
703 /*
704 * Assign phy dev to usb-phy dev. Host/device drivers can use phy
705 * reference to retrieve usb-phy details.
706 */
707 port->usb_phy.dev = &lane->pad->lanes[port->index]->dev;
708 port->usb_phy.dev->driver = port->dev.driver;
709 port->usb_phy.otg->usb_phy = &port->usb_phy;
710 port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral;
711 port->usb_phy.otg->set_host = tegra_xusb_set_host;
712
713 err = usb_add_phy_dev(&port->usb_phy);
714 if (err < 0) {
715 dev_err(&port->dev, "Failed to add USB PHY: %d\n", err);
716 return err;
717 }
718
719 /* populate connector entry */
720 of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev);
721
722 return err;
723}
724
725static void tegra_xusb_parse_usb_role_default_mode(struct tegra_xusb_port *port)
726{
727 enum usb_role role = USB_ROLE_NONE;
728 enum usb_dr_mode mode = usb_get_role_switch_default_mode(&port->dev);
729
730 if (mode == USB_DR_MODE_HOST)
731 role = USB_ROLE_HOST;
732 else if (mode == USB_DR_MODE_PERIPHERAL)
733 role = USB_ROLE_DEVICE;
734
735 if (role != USB_ROLE_NONE) {
736 usb_role_switch_set_role(port->usb_role_sw, role);
737 dev_dbg(&port->dev, "usb role default mode is %s", modes[mode]);
738 }
739}
740
741static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
742{
743 struct tegra_xusb_port *port = &usb2->base;
744 struct device_node *np = port->dev.of_node;
745 const char *mode;
746 int err;
747
748 usb2->internal = of_property_read_bool(np, "nvidia,internal");
749
750 if (!of_property_read_string(np, "mode", &mode)) {
751 int err = match_string(modes, ARRAY_SIZE(modes), mode);
752 if (err < 0) {
753 dev_err(&port->dev, "invalid value %s for \"mode\"\n",
754 mode);
755 usb2->mode = USB_DR_MODE_UNKNOWN;
756 } else {
757 usb2->mode = err;
758 }
759 } else {
760 usb2->mode = USB_DR_MODE_HOST;
761 }
762
763 /* usb-role-switch property is mandatory for OTG/Peripheral modes */
764 if (usb2->mode == USB_DR_MODE_PERIPHERAL ||
765 usb2->mode == USB_DR_MODE_OTG) {
766 if (of_property_read_bool(np, "usb-role-switch")) {
767 err = tegra_xusb_setup_usb_role_switch(port);
768 if (err < 0)
769 return err;
770 tegra_xusb_parse_usb_role_default_mode(port);
771 } else {
772 dev_err(&port->dev, "usb-role-switch not found for %s mode",
773 modes[usb2->mode]);
774 return -EINVAL;
775 }
776 }
777
778 usb2->supply = regulator_get(&port->dev, "vbus");
779 return PTR_ERR_OR_ZERO(usb2->supply);
780}
781
782static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
783 unsigned int index)
784{
785 struct tegra_xusb_usb2_port *usb2;
786 struct device_node *np;
787 int err = 0;
788
789 /*
790 * USB2 ports don't require additional properties, but if the port is
791 * marked as disabled there is no reason to register it.
792 */
793 np = tegra_xusb_find_port_node(padctl, "usb2", index);
794 if (!np || !of_device_is_available(np))
795 goto out;
796
797 usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL);
798 if (!usb2) {
799 err = -ENOMEM;
800 goto out;
801 }
802
803 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
804 if (err < 0)
805 goto out;
806
807 usb2->base.ops = padctl->soc->ports.usb2.ops;
808
809 usb2->base.lane = usb2->base.ops->map(&usb2->base);
810 if (IS_ERR(usb2->base.lane)) {
811 err = PTR_ERR(usb2->base.lane);
812 tegra_xusb_port_unregister(&usb2->base);
813 goto out;
814 }
815
816 err = tegra_xusb_usb2_port_parse_dt(usb2);
817 if (err < 0) {
818 tegra_xusb_port_unregister(&usb2->base);
819 goto out;
820 }
821
822 list_add_tail(&usb2->base.list, &padctl->ports);
823
824out:
825 of_node_put(np);
826 return err;
827}
828
829void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port)
830{
831 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
832
833 kfree(usb2);
834}
835
836void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port)
837{
838 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
839
840 regulator_put(usb2->supply);
841}
842
843static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
844{
845 struct tegra_xusb_port *port = &ulpi->base;
846 struct device_node *np = port->dev.of_node;
847
848 ulpi->internal = of_property_read_bool(np, "nvidia,internal");
849
850 return 0;
851}
852
853static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
854 unsigned int index)
855{
856 struct tegra_xusb_ulpi_port *ulpi;
857 struct device_node *np;
858 int err = 0;
859
860 np = tegra_xusb_find_port_node(padctl, "ulpi", index);
861 if (!np || !of_device_is_available(np))
862 goto out;
863
864 ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
865 if (!ulpi) {
866 err = -ENOMEM;
867 goto out;
868 }
869
870 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
871 if (err < 0)
872 goto out;
873
874 ulpi->base.ops = padctl->soc->ports.ulpi.ops;
875
876 ulpi->base.lane = ulpi->base.ops->map(&ulpi->base);
877 if (IS_ERR(ulpi->base.lane)) {
878 err = PTR_ERR(ulpi->base.lane);
879 tegra_xusb_port_unregister(&ulpi->base);
880 goto out;
881 }
882
883 err = tegra_xusb_ulpi_port_parse_dt(ulpi);
884 if (err < 0) {
885 tegra_xusb_port_unregister(&ulpi->base);
886 goto out;
887 }
888
889 list_add_tail(&ulpi->base.list, &padctl->ports);
890
891out:
892 of_node_put(np);
893 return err;
894}
895
896void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port)
897{
898 struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port);
899
900 kfree(ulpi);
901}
902
903static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
904{
905 /* XXX */
906 return 0;
907}
908
909static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
910 unsigned int index)
911{
912 struct tegra_xusb_hsic_port *hsic;
913 struct device_node *np;
914 int err = 0;
915
916 np = tegra_xusb_find_port_node(padctl, "hsic", index);
917 if (!np || !of_device_is_available(np))
918 goto out;
919
920 hsic = kzalloc(sizeof(*hsic), GFP_KERNEL);
921 if (!hsic) {
922 err = -ENOMEM;
923 goto out;
924 }
925
926 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
927 if (err < 0)
928 goto out;
929
930 hsic->base.ops = padctl->soc->ports.hsic.ops;
931
932 hsic->base.lane = hsic->base.ops->map(&hsic->base);
933 if (IS_ERR(hsic->base.lane)) {
934 err = PTR_ERR(hsic->base.lane);
935 goto out;
936 }
937
938 err = tegra_xusb_hsic_port_parse_dt(hsic);
939 if (err < 0) {
940 tegra_xusb_port_unregister(&hsic->base);
941 goto out;
942 }
943
944 list_add_tail(&hsic->base.list, &padctl->ports);
945
946out:
947 of_node_put(np);
948 return err;
949}
950
951void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port)
952{
953 struct tegra_xusb_hsic_port *hsic = to_hsic_port(port);
954
955 kfree(hsic);
956}
957
958static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
959{
960 struct tegra_xusb_port *port = &usb3->base;
961 struct device_node *np = port->dev.of_node;
962 enum usb_device_speed maximum_speed;
963 u32 value;
964 int err;
965
966 err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
967 if (err < 0) {
968 dev_err(&port->dev, "failed to read port: %d\n", err);
969 return err;
970 }
971
972 usb3->port = value;
973
974 usb3->internal = of_property_read_bool(np, "nvidia,internal");
975
976 if (device_property_present(&port->dev, "maximum-speed")) {
977 maximum_speed = usb_get_maximum_speed(&port->dev);
978 if (maximum_speed == USB_SPEED_SUPER)
979 usb3->disable_gen2 = true;
980 else if (maximum_speed == USB_SPEED_SUPER_PLUS)
981 usb3->disable_gen2 = false;
982 else
983 return -EINVAL;
984 }
985
986 return 0;
987}
988
989static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
990 unsigned int index)
991{
992 struct tegra_xusb_usb3_port *usb3;
993 struct device_node *np;
994 int err = 0;
995
996 /*
997 * If there is no supplemental configuration in the device tree the
998 * port is unusable. But it is valid to configure only a single port,
999 * hence return 0 instead of an error to allow ports to be optional.
1000 */
1001 np = tegra_xusb_find_port_node(padctl, "usb3", index);
1002 if (!np || !of_device_is_available(np))
1003 goto out;
1004
1005 usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL);
1006 if (!usb3) {
1007 err = -ENOMEM;
1008 goto out;
1009 }
1010
1011 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
1012 if (err < 0)
1013 goto out;
1014
1015 usb3->base.ops = padctl->soc->ports.usb3.ops;
1016
1017 usb3->base.lane = usb3->base.ops->map(&usb3->base);
1018 if (IS_ERR(usb3->base.lane)) {
1019 err = PTR_ERR(usb3->base.lane);
1020 goto out;
1021 }
1022
1023 err = tegra_xusb_usb3_port_parse_dt(usb3);
1024 if (err < 0) {
1025 tegra_xusb_port_unregister(&usb3->base);
1026 goto out;
1027 }
1028
1029 list_add_tail(&usb3->base.list, &padctl->ports);
1030
1031out:
1032 of_node_put(np);
1033 return err;
1034}
1035
1036void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port)
1037{
1038 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port);
1039
1040 kfree(usb3);
1041}
1042
1043static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1044{
1045 struct tegra_xusb_port *port, *tmp;
1046
1047 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
1048 list_del(&port->list);
1049 tegra_xusb_port_unregister(port);
1050 }
1051}
1052
1053static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl)
1054{
1055 struct device_node *np;
1056 unsigned int i;
1057
1058 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1059 np = tegra_xusb_find_port_node(padctl, "usb3", i);
1060 if (!np || !of_device_is_available(np))
1061 return i;
1062 }
1063
1064 return -ENODEV;
1065}
1066
1067static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2)
1068{
1069 unsigned int i;
1070 struct tegra_xusb_usb3_port *usb3;
1071 struct tegra_xusb_padctl *padctl = usb2->base.padctl;
1072
1073 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1074 usb3 = tegra_xusb_find_usb3_port(padctl, i);
1075 if (usb3 && usb3->port == usb2->base.index)
1076 return true;
1077 }
1078
1079 return false;
1080}
1081
1082static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2)
1083{
1084 int fake;
1085
1086 /* Disable usb3_port_fake usage by default and assign if needed */
1087 usb2->usb3_port_fake = -1;
1088
1089 if ((usb2->mode == USB_DR_MODE_OTG ||
1090 usb2->mode == USB_DR_MODE_PERIPHERAL) &&
1091 !tegra_xusb_port_is_companion(usb2)) {
1092 fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl);
1093 if (fake < 0) {
1094 dev_err(&usb2->base.dev, "no unused USB3 ports available\n");
1095 return -ENODEV;
1096 }
1097
1098 dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake);
1099 usb2->usb3_port_fake = fake;
1100 }
1101
1102 return 0;
1103}
1104
1105static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
1106{
1107 struct tegra_xusb_port *port;
1108 struct tegra_xusb_usb2_port *usb2;
1109 unsigned int i;
1110 int err = 0;
1111
1112 mutex_lock(&padctl->lock);
1113
1114 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1115 err = tegra_xusb_add_usb2_port(padctl, i);
1116 if (err < 0)
1117 goto remove_ports;
1118 }
1119
1120 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
1121 err = tegra_xusb_add_ulpi_port(padctl, i);
1122 if (err < 0)
1123 goto remove_ports;
1124 }
1125
1126 for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
1127 err = tegra_xusb_add_hsic_port(padctl, i);
1128 if (err < 0)
1129 goto remove_ports;
1130 }
1131
1132 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1133 err = tegra_xusb_add_usb3_port(padctl, i);
1134 if (err < 0)
1135 goto remove_ports;
1136 }
1137
1138 if (padctl->soc->need_fake_usb3_port) {
1139 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1140 usb2 = tegra_xusb_find_usb2_port(padctl, i);
1141 if (!usb2)
1142 continue;
1143
1144 err = tegra_xusb_update_usb3_fake_port(usb2);
1145 if (err < 0)
1146 goto remove_ports;
1147 }
1148 }
1149
1150 list_for_each_entry(port, &padctl->ports, list) {
1151 err = port->ops->enable(port);
1152 if (err < 0)
1153 dev_err(padctl->dev, "failed to enable port %s: %d\n",
1154 dev_name(&port->dev), err);
1155 }
1156
1157 goto unlock;
1158
1159remove_ports:
1160 __tegra_xusb_remove_ports(padctl);
1161unlock:
1162 mutex_unlock(&padctl->lock);
1163 return err;
1164}
1165
1166static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1167{
1168 mutex_lock(&padctl->lock);
1169 __tegra_xusb_remove_ports(padctl);
1170 mutex_unlock(&padctl->lock);
1171}
1172
1173static int tegra_xusb_padctl_probe(struct platform_device *pdev)
1174{
1175 struct device_node *np = pdev->dev.of_node;
1176 const struct tegra_xusb_padctl_soc *soc;
1177 struct tegra_xusb_padctl *padctl;
1178 const struct of_device_id *match;
1179 int err;
1180
1181 /* for backwards compatibility with old device trees */
1182 np = of_get_child_by_name(np, "pads");
1183 if (!np) {
1184 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
1185 return tegra_xusb_padctl_legacy_probe(pdev);
1186 }
1187
1188 of_node_put(np);
1189
1190 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
1191 soc = match->data;
1192
1193 padctl = soc->ops->probe(&pdev->dev, soc);
1194 if (IS_ERR(padctl))
1195 return PTR_ERR(padctl);
1196
1197 platform_set_drvdata(pdev, padctl);
1198 INIT_LIST_HEAD(&padctl->ports);
1199 INIT_LIST_HEAD(&padctl->lanes);
1200 INIT_LIST_HEAD(&padctl->pads);
1201 mutex_init(&padctl->lock);
1202
1203 padctl->regs = devm_platform_ioremap_resource(pdev, 0);
1204 if (IS_ERR(padctl->regs)) {
1205 err = PTR_ERR(padctl->regs);
1206 goto remove;
1207 }
1208
1209 padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
1210 if (IS_ERR(padctl->rst)) {
1211 err = PTR_ERR(padctl->rst);
1212 goto remove;
1213 }
1214
1215 padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
1216 sizeof(*padctl->supplies), GFP_KERNEL);
1217 if (!padctl->supplies) {
1218 err = -ENOMEM;
1219 goto remove;
1220 }
1221
1222 regulator_bulk_set_supply_names(padctl->supplies,
1223 padctl->soc->supply_names,
1224 padctl->soc->num_supplies);
1225
1226 err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
1227 padctl->supplies);
1228 if (err < 0) {
1229 dev_err_probe(&pdev->dev, err, "failed to get regulators\n");
1230 goto remove;
1231 }
1232
1233 err = reset_control_deassert(padctl->rst);
1234 if (err < 0)
1235 goto remove;
1236
1237 err = regulator_bulk_enable(padctl->soc->num_supplies,
1238 padctl->supplies);
1239 if (err < 0) {
1240 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
1241 goto reset;
1242 }
1243
1244 err = tegra_xusb_setup_pads(padctl);
1245 if (err < 0) {
1246 dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
1247 goto power_down;
1248 }
1249
1250 err = tegra_xusb_setup_ports(padctl);
1251 if (err) {
1252 const char *level = KERN_ERR;
1253
1254 if (err == -EPROBE_DEFER)
1255 level = KERN_DEBUG;
1256
1257 dev_printk(level, &pdev->dev,
1258 dev_fmt("failed to setup XUSB ports: %d\n"), err);
1259 goto remove_pads;
1260 }
1261
1262 return 0;
1263
1264remove_pads:
1265 tegra_xusb_remove_pads(padctl);
1266power_down:
1267 regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
1268reset:
1269 reset_control_assert(padctl->rst);
1270remove:
1271 platform_set_drvdata(pdev, NULL);
1272 soc->ops->remove(padctl);
1273 return err;
1274}
1275
1276static void tegra_xusb_padctl_remove(struct platform_device *pdev)
1277{
1278 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
1279 int err;
1280
1281 tegra_xusb_remove_ports(padctl);
1282 tegra_xusb_remove_pads(padctl);
1283
1284 err = regulator_bulk_disable(padctl->soc->num_supplies,
1285 padctl->supplies);
1286 if (err < 0)
1287 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
1288
1289 err = reset_control_assert(padctl->rst);
1290 if (err < 0)
1291 dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
1292
1293 padctl->soc->ops->remove(padctl);
1294}
1295
1296static __maybe_unused int tegra_xusb_padctl_suspend_noirq(struct device *dev)
1297{
1298 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
1299
1300 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq)
1301 return padctl->soc->ops->suspend_noirq(padctl);
1302
1303 return 0;
1304}
1305
1306static __maybe_unused int tegra_xusb_padctl_resume_noirq(struct device *dev)
1307{
1308 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
1309
1310 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq)
1311 return padctl->soc->ops->resume_noirq(padctl);
1312
1313 return 0;
1314}
1315
1316static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = {
1317 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq,
1318 tegra_xusb_padctl_resume_noirq)
1319};
1320
1321static struct platform_driver tegra_xusb_padctl_driver = {
1322 .driver = {
1323 .name = "tegra-xusb-padctl",
1324 .of_match_table = tegra_xusb_padctl_of_match,
1325 .pm = &tegra_xusb_padctl_pm_ops,
1326 },
1327 .probe = tegra_xusb_padctl_probe,
1328 .remove_new = tegra_xusb_padctl_remove,
1329};
1330module_platform_driver(tegra_xusb_padctl_driver);
1331
1332struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
1333{
1334 struct tegra_xusb_padctl *padctl;
1335 struct platform_device *pdev;
1336 struct device_node *np;
1337
1338 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
1339 if (!np)
1340 return ERR_PTR(-EINVAL);
1341
1342 /*
1343 * This is slightly ugly. A better implementation would be to keep a
1344 * registry of pad controllers, but since there will almost certainly
1345 * only ever be one per SoC that would be a little overkill.
1346 */
1347 pdev = of_find_device_by_node(np);
1348 if (!pdev) {
1349 of_node_put(np);
1350 return ERR_PTR(-ENODEV);
1351 }
1352
1353 of_node_put(np);
1354
1355 padctl = platform_get_drvdata(pdev);
1356 if (!padctl) {
1357 put_device(&pdev->dev);
1358 return ERR_PTR(-EPROBE_DEFER);
1359 }
1360
1361 return padctl;
1362}
1363EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
1364
1365void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
1366{
1367 if (padctl)
1368 put_device(padctl->dev);
1369}
1370EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
1371
1372int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
1373 unsigned int port)
1374{
1375 if (padctl->soc->ops->usb3_save_context)
1376 return padctl->soc->ops->usb3_save_context(padctl, port);
1377
1378 return -ENOSYS;
1379}
1380EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
1381
1382int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
1383 unsigned int port, bool idle)
1384{
1385 if (padctl->soc->ops->hsic_set_idle)
1386 return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
1387
1388 return -ENOSYS;
1389}
1390EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
1391
1392int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy,
1393 enum usb_device_speed speed)
1394{
1395 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1396
1397 if (lane->pad->ops->enable_phy_sleepwalk)
1398 return lane->pad->ops->enable_phy_sleepwalk(lane, speed);
1399
1400 return -EOPNOTSUPP;
1401}
1402EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk);
1403
1404int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy)
1405{
1406 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1407
1408 if (lane->pad->ops->disable_phy_sleepwalk)
1409 return lane->pad->ops->disable_phy_sleepwalk(lane);
1410
1411 return -EOPNOTSUPP;
1412}
1413EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk);
1414
1415int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
1416{
1417 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1418
1419 if (lane->pad->ops->enable_phy_wake)
1420 return lane->pad->ops->enable_phy_wake(lane);
1421
1422 return -EOPNOTSUPP;
1423}
1424EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake);
1425
1426int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
1427{
1428 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1429
1430 if (lane->pad->ops->disable_phy_wake)
1431 return lane->pad->ops->disable_phy_wake(lane);
1432
1433 return -EOPNOTSUPP;
1434}
1435EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake);
1436
1437bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy)
1438{
1439 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1440
1441 if (lane->pad->ops->remote_wake_detected)
1442 return lane->pad->ops->remote_wake_detected(lane);
1443
1444 return false;
1445}
1446EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected);
1447
1448int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
1449 unsigned int port, bool enable)
1450{
1451 if (padctl->soc->ops->usb3_set_lfps_detect)
1452 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
1453 enable);
1454
1455 return -ENOSYS;
1456}
1457EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
1458
1459int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
1460 bool val)
1461{
1462 if (padctl->soc->ops->vbus_override)
1463 return padctl->soc->ops->vbus_override(padctl, val);
1464
1465 return -ENOTSUPP;
1466}
1467EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override);
1468
1469int tegra_phy_xusb_utmi_port_reset(struct phy *phy)
1470{
1471 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1472 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
1473
1474 if (padctl->soc->ops->utmi_port_reset)
1475 return padctl->soc->ops->utmi_port_reset(phy);
1476
1477 return -ENOTSUPP;
1478}
1479EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset);
1480
1481void tegra_phy_xusb_utmi_pad_power_on(struct phy *phy)
1482{
1483 struct tegra_xusb_lane *lane;
1484 struct tegra_xusb_padctl *padctl;
1485
1486 if (!phy)
1487 return;
1488
1489 lane = phy_get_drvdata(phy);
1490 padctl = lane->pad->padctl;
1491
1492 if (padctl->soc->ops->utmi_pad_power_on)
1493 padctl->soc->ops->utmi_pad_power_on(phy);
1494}
1495EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_on);
1496
1497void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy)
1498{
1499 struct tegra_xusb_lane *lane;
1500 struct tegra_xusb_padctl *padctl;
1501
1502 if (!phy)
1503 return;
1504
1505 lane = phy_get_drvdata(phy);
1506 padctl = lane->pad->padctl;
1507
1508 if (padctl->soc->ops->utmi_pad_power_down)
1509 padctl->soc->ops->utmi_pad_power_down(phy);
1510}
1511EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_down);
1512
1513int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
1514 unsigned int port)
1515{
1516 struct tegra_xusb_usb2_port *usb2;
1517 struct tegra_xusb_usb3_port *usb3;
1518 int i;
1519
1520 usb2 = tegra_xusb_find_usb2_port(padctl, port);
1521 if (!usb2)
1522 return -EINVAL;
1523
1524 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1525 usb3 = tegra_xusb_find_usb3_port(padctl, i);
1526 if (usb3 && usb3->port == usb2->base.index)
1527 return usb3->base.index;
1528 }
1529
1530 return -ENODEV;
1531}
1532EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
1533
1534MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
1535MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
1536MODULE_LICENSE("GPL v2");