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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_device.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 { }
76};
77MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
78
79static struct device_node *
80tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
81{
82 struct device_node *pads, *np;
83
84 pads = of_get_child_by_name(padctl->dev->of_node, "pads");
85 if (!pads)
86 return NULL;
87
88 np = of_get_child_by_name(pads, name);
89 of_node_put(pads);
90
91 return np;
92}
93
94static struct device_node *
95tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
96{
97 struct device_node *np, *lanes;
98
99 lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
100 if (!lanes)
101 return NULL;
102
103 np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
104 of_node_put(lanes);
105
106 return np;
107}
108
109int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
110 struct device_node *np)
111{
112 struct device *dev = &lane->pad->dev;
113 const char *function;
114 int err;
115
116 err = of_property_read_string(np, "nvidia,function", &function);
117 if (err < 0)
118 return err;
119
120 err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
121 if (err < 0) {
122 dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
123 function, np);
124 return err;
125 }
126
127 lane->function = err;
128
129 return 0;
130}
131
132static void tegra_xusb_lane_destroy(struct phy *phy)
133{
134 if (phy) {
135 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
136
137 lane->pad->ops->remove(lane);
138 phy_destroy(phy);
139 }
140}
141
142static void tegra_xusb_pad_release(struct device *dev)
143{
144 struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
145
146 pad->soc->ops->remove(pad);
147}
148
149static const struct device_type tegra_xusb_pad_type = {
150 .release = tegra_xusb_pad_release,
151};
152
153int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
154 struct tegra_xusb_padctl *padctl,
155 struct device_node *np)
156{
157 int err;
158
159 device_initialize(&pad->dev);
160 INIT_LIST_HEAD(&pad->list);
161 pad->dev.parent = padctl->dev;
162 pad->dev.type = &tegra_xusb_pad_type;
163 pad->dev.of_node = np;
164 pad->padctl = padctl;
165
166 err = dev_set_name(&pad->dev, "%s", pad->soc->name);
167 if (err < 0)
168 goto unregister;
169
170 err = device_add(&pad->dev);
171 if (err < 0)
172 goto unregister;
173
174 return 0;
175
176unregister:
177 device_unregister(&pad->dev);
178 return err;
179}
180
181int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
182 const struct phy_ops *ops)
183{
184 struct device_node *children;
185 struct phy *lane;
186 unsigned int i;
187 int err;
188
189 children = of_get_child_by_name(pad->dev.of_node, "lanes");
190 if (!children)
191 return -ENODEV;
192
193 pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
194 GFP_KERNEL);
195 if (!pad->lanes) {
196 of_node_put(children);
197 return -ENOMEM;
198 }
199
200 for (i = 0; i < pad->soc->num_lanes; i++) {
201 struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i);
202 struct tegra_xusb_lane *lane;
203
204 /* skip disabled lanes */
205 if (!np || !of_device_is_available(np)) {
206 of_node_put(np);
207 continue;
208 }
209
210 pad->lanes[i] = phy_create(&pad->dev, np, ops);
211 if (IS_ERR(pad->lanes[i])) {
212 err = PTR_ERR(pad->lanes[i]);
213 of_node_put(np);
214 goto remove;
215 }
216
217 lane = pad->ops->probe(pad, np, i);
218 if (IS_ERR(lane)) {
219 phy_destroy(pad->lanes[i]);
220 err = PTR_ERR(lane);
221 goto remove;
222 }
223
224 list_add_tail(&lane->list, &pad->padctl->lanes);
225 phy_set_drvdata(pad->lanes[i], lane);
226 }
227
228 pad->provider = of_phy_provider_register_full(&pad->dev, children,
229 tegra_xusb_pad_of_xlate);
230 if (IS_ERR(pad->provider)) {
231 err = PTR_ERR(pad->provider);
232 goto remove;
233 }
234
235 return 0;
236
237remove:
238 while (i--)
239 tegra_xusb_lane_destroy(pad->lanes[i]);
240
241 of_node_put(children);
242
243 return err;
244}
245
246void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
247{
248 unsigned int i = pad->soc->num_lanes;
249
250 of_phy_provider_unregister(pad->provider);
251
252 while (i--)
253 tegra_xusb_lane_destroy(pad->lanes[i]);
254
255 device_unregister(&pad->dev);
256}
257
258static struct tegra_xusb_pad *
259tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
260 const struct tegra_xusb_pad_soc *soc)
261{
262 struct tegra_xusb_pad *pad;
263 struct device_node *np;
264 int err;
265
266 np = tegra_xusb_find_pad_node(padctl, soc->name);
267 if (!np || !of_device_is_available(np))
268 return NULL;
269
270 pad = soc->ops->probe(padctl, soc, np);
271 if (IS_ERR(pad)) {
272 err = PTR_ERR(pad);
273 dev_err(padctl->dev, "failed to create pad %s: %d\n",
274 soc->name, err);
275 return ERR_PTR(err);
276 }
277
278 /* XXX move this into ->probe() to avoid string comparison */
279 if (strcmp(soc->name, "pcie") == 0)
280 padctl->pcie = pad;
281
282 if (strcmp(soc->name, "sata") == 0)
283 padctl->sata = pad;
284
285 if (strcmp(soc->name, "usb2") == 0)
286 padctl->usb2 = pad;
287
288 if (strcmp(soc->name, "ulpi") == 0)
289 padctl->ulpi = pad;
290
291 if (strcmp(soc->name, "hsic") == 0)
292 padctl->hsic = pad;
293
294 return pad;
295}
296
297static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
298{
299 struct tegra_xusb_pad *pad, *tmp;
300
301 list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
302 list_del(&pad->list);
303 tegra_xusb_pad_unregister(pad);
304 }
305}
306
307static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
308{
309 mutex_lock(&padctl->lock);
310 __tegra_xusb_remove_pads(padctl);
311 mutex_unlock(&padctl->lock);
312}
313
314static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
315{
316 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
317 const struct tegra_xusb_lane_soc *soc = lane->soc;
318 u32 value;
319
320 /* skip single function lanes */
321 if (soc->num_funcs < 2)
322 return;
323
324 if (lane->pad->ops->iddq_enable)
325 lane->pad->ops->iddq_enable(lane);
326
327 /* choose function */
328 value = padctl_readl(padctl, soc->offset);
329 value &= ~(soc->mask << soc->shift);
330 value |= lane->function << soc->shift;
331 padctl_writel(padctl, value, soc->offset);
332
333 if (lane->pad->ops->iddq_disable)
334 lane->pad->ops->iddq_disable(lane);
335}
336
337static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
338{
339 unsigned int i;
340
341 for (i = 0; i < pad->soc->num_lanes; i++) {
342 struct tegra_xusb_lane *lane;
343
344 if (pad->lanes[i]) {
345 lane = phy_get_drvdata(pad->lanes[i]);
346 tegra_xusb_lane_program(lane);
347 }
348 }
349}
350
351static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
352{
353 struct tegra_xusb_pad *pad;
354 unsigned int i;
355
356 mutex_lock(&padctl->lock);
357
358 for (i = 0; i < padctl->soc->num_pads; i++) {
359 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
360 int err;
361
362 pad = tegra_xusb_pad_create(padctl, soc);
363 if (IS_ERR(pad)) {
364 err = PTR_ERR(pad);
365 dev_err(padctl->dev, "failed to create pad %s: %d\n",
366 soc->name, err);
367 __tegra_xusb_remove_pads(padctl);
368 mutex_unlock(&padctl->lock);
369 return err;
370 }
371
372 if (!pad)
373 continue;
374
375 list_add_tail(&pad->list, &padctl->pads);
376 }
377
378 list_for_each_entry(pad, &padctl->pads, list)
379 tegra_xusb_pad_program(pad);
380
381 mutex_unlock(&padctl->lock);
382 return 0;
383}
384
385bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
386 const char *function)
387{
388 const char *func = lane->soc->funcs[lane->function];
389
390 return strcmp(function, func) == 0;
391}
392
393struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
394 const char *type,
395 unsigned int index)
396{
397 struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
398 char *name;
399
400 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
401 if (!name)
402 return ERR_PTR(-ENOMEM);
403
404 list_for_each_entry(lane, &padctl->lanes, list) {
405 if (strcmp(lane->soc->name, name) == 0) {
406 hit = lane;
407 break;
408 }
409 }
410
411 kfree(name);
412 return hit;
413}
414
415struct tegra_xusb_lane *
416tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
417 const struct tegra_xusb_lane_map *map,
418 const char *function)
419{
420 struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
421
422 for (; map->type; map++) {
423 if (port->index != map->port)
424 continue;
425
426 lane = tegra_xusb_find_lane(port->padctl, map->type,
427 map->index);
428 if (IS_ERR(lane))
429 continue;
430
431 if (!tegra_xusb_lane_check(lane, function))
432 continue;
433
434 if (!IS_ERR(match))
435 dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
436 map->type, map->index, match->soc->name);
437 else
438 match = lane;
439 }
440
441 return match;
442}
443
444static struct device_node *
445tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
446 unsigned int index)
447{
448 struct device_node *ports, *np;
449 char *name;
450
451 ports = of_get_child_by_name(padctl->dev->of_node, "ports");
452 if (!ports)
453 return NULL;
454
455 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
456 if (!name) {
457 of_node_put(ports);
458 return NULL;
459 }
460 np = of_get_child_by_name(ports, name);
461 kfree(name);
462 of_node_put(ports);
463
464 return np;
465}
466
467struct tegra_xusb_port *
468tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
469 unsigned int index)
470{
471 struct tegra_xusb_port *port;
472 struct device_node *np;
473
474 np = tegra_xusb_find_port_node(padctl, type, index);
475 if (!np)
476 return NULL;
477
478 list_for_each_entry(port, &padctl->ports, list) {
479 if (np == port->dev.of_node) {
480 of_node_put(np);
481 return port;
482 }
483 }
484
485 of_node_put(np);
486
487 return NULL;
488}
489
490struct tegra_xusb_usb2_port *
491tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
492{
493 struct tegra_xusb_port *port;
494
495 port = tegra_xusb_find_port(padctl, "usb2", index);
496 if (port)
497 return to_usb2_port(port);
498
499 return NULL;
500}
501
502struct tegra_xusb_usb3_port *
503tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
504{
505 struct tegra_xusb_port *port;
506
507 port = tegra_xusb_find_port(padctl, "usb3", index);
508 if (port)
509 return to_usb3_port(port);
510
511 return NULL;
512}
513
514static void tegra_xusb_port_release(struct device *dev)
515{
516 struct tegra_xusb_port *port = to_tegra_xusb_port(dev);
517
518 if (port->ops->release)
519 port->ops->release(port);
520}
521
522static const struct device_type tegra_xusb_port_type = {
523 .release = tegra_xusb_port_release,
524};
525
526static int tegra_xusb_port_init(struct tegra_xusb_port *port,
527 struct tegra_xusb_padctl *padctl,
528 struct device_node *np,
529 const char *name,
530 unsigned int index)
531{
532 int err;
533
534 INIT_LIST_HEAD(&port->list);
535 port->padctl = padctl;
536 port->index = index;
537
538 device_initialize(&port->dev);
539 port->dev.type = &tegra_xusb_port_type;
540 port->dev.of_node = of_node_get(np);
541 port->dev.parent = padctl->dev;
542
543 err = dev_set_name(&port->dev, "%s-%u", name, index);
544 if (err < 0)
545 goto unregister;
546
547 err = device_add(&port->dev);
548 if (err < 0)
549 goto unregister;
550
551 return 0;
552
553unregister:
554 device_unregister(&port->dev);
555 return err;
556}
557
558static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
559{
560 if (!IS_ERR_OR_NULL(port->usb_role_sw)) {
561 of_platform_depopulate(&port->dev);
562 usb_role_switch_unregister(port->usb_role_sw);
563 cancel_work_sync(&port->usb_phy_work);
564 usb_remove_phy(&port->usb_phy);
565 }
566
567 if (port->ops->remove)
568 port->ops->remove(port);
569
570 device_unregister(&port->dev);
571}
572
573static const char *const modes[] = {
574 [USB_DR_MODE_UNKNOWN] = "",
575 [USB_DR_MODE_HOST] = "host",
576 [USB_DR_MODE_PERIPHERAL] = "peripheral",
577 [USB_DR_MODE_OTG] = "otg",
578};
579
580static const char * const usb_roles[] = {
581 [USB_ROLE_NONE] = "none",
582 [USB_ROLE_HOST] = "host",
583 [USB_ROLE_DEVICE] = "device",
584};
585
586static enum usb_phy_events to_usb_phy_event(enum usb_role role)
587{
588 switch (role) {
589 case USB_ROLE_DEVICE:
590 return USB_EVENT_VBUS;
591
592 case USB_ROLE_HOST:
593 return USB_EVENT_ID;
594
595 default:
596 return USB_EVENT_NONE;
597 }
598}
599
600static void tegra_xusb_usb_phy_work(struct work_struct *work)
601{
602 struct tegra_xusb_port *port = container_of(work,
603 struct tegra_xusb_port,
604 usb_phy_work);
605 enum usb_role role = usb_role_switch_get_role(port->usb_role_sw);
606
607 usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role));
608
609 dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__,
610 usb_roles[role]);
611
612 atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy);
613}
614
615static int tegra_xusb_role_sw_set(struct usb_role_switch *sw,
616 enum usb_role role)
617{
618 struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw);
619
620 dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]);
621
622 schedule_work(&port->usb_phy_work);
623
624 return 0;
625}
626
627static int tegra_xusb_set_peripheral(struct usb_otg *otg,
628 struct usb_gadget *gadget)
629{
630 struct tegra_xusb_port *port = container_of(otg->usb_phy,
631 struct tegra_xusb_port,
632 usb_phy);
633
634 if (gadget != NULL)
635 schedule_work(&port->usb_phy_work);
636
637 return 0;
638}
639
640static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host)
641{
642 struct tegra_xusb_port *port = container_of(otg->usb_phy,
643 struct tegra_xusb_port,
644 usb_phy);
645
646 if (host != NULL)
647 schedule_work(&port->usb_phy_work);
648
649 return 0;
650}
651
652
653static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port)
654{
655 struct tegra_xusb_lane *lane;
656 struct usb_role_switch_desc role_sx_desc = {
657 .fwnode = dev_fwnode(&port->dev),
658 .set = tegra_xusb_role_sw_set,
659 .allow_userspace_control = true,
660 };
661 int err = 0;
662
663 /*
664 * USB role switch driver needs parent driver owner info. This is a
665 * suboptimal solution. TODO: Need to revisit this in a follow-up patch
666 * where an optimal solution is possible with changes to USB role
667 * switch driver.
668 */
669 port->dev.driver = devm_kzalloc(&port->dev,
670 sizeof(struct device_driver),
671 GFP_KERNEL);
672 port->dev.driver->owner = THIS_MODULE;
673
674 port->usb_role_sw = usb_role_switch_register(&port->dev,
675 &role_sx_desc);
676 if (IS_ERR(port->usb_role_sw)) {
677 err = PTR_ERR(port->usb_role_sw);
678 dev_err(&port->dev, "failed to register USB role switch: %d",
679 err);
680 return err;
681 }
682
683 INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work);
684 usb_role_switch_set_drvdata(port->usb_role_sw, port);
685
686 port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg),
687 GFP_KERNEL);
688 if (!port->usb_phy.otg)
689 return -ENOMEM;
690
691 lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index);
692
693 /*
694 * Assign phy dev to usb-phy dev. Host/device drivers can use phy
695 * reference to retrieve usb-phy details.
696 */
697 port->usb_phy.dev = &lane->pad->lanes[port->index]->dev;
698 port->usb_phy.dev->driver = port->dev.driver;
699 port->usb_phy.otg->usb_phy = &port->usb_phy;
700 port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral;
701 port->usb_phy.otg->set_host = tegra_xusb_set_host;
702
703 err = usb_add_phy_dev(&port->usb_phy);
704 if (err < 0) {
705 dev_err(&port->dev, "Failed to add USB PHY: %d\n", err);
706 return err;
707 }
708
709 /* populate connector entry */
710 of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev);
711
712 return err;
713}
714
715static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
716{
717 struct tegra_xusb_port *port = &usb2->base;
718 struct device_node *np = port->dev.of_node;
719 const char *mode;
720 int err;
721
722 usb2->internal = of_property_read_bool(np, "nvidia,internal");
723
724 if (!of_property_read_string(np, "mode", &mode)) {
725 int err = match_string(modes, ARRAY_SIZE(modes), mode);
726 if (err < 0) {
727 dev_err(&port->dev, "invalid value %s for \"mode\"\n",
728 mode);
729 usb2->mode = USB_DR_MODE_UNKNOWN;
730 } else {
731 usb2->mode = err;
732 }
733 } else {
734 usb2->mode = USB_DR_MODE_HOST;
735 }
736
737 /* usb-role-switch property is mandatory for OTG/Peripheral modes */
738 if (usb2->mode == USB_DR_MODE_PERIPHERAL ||
739 usb2->mode == USB_DR_MODE_OTG) {
740 if (of_property_read_bool(np, "usb-role-switch")) {
741 err = tegra_xusb_setup_usb_role_switch(port);
742 if (err < 0)
743 return err;
744 } else {
745 dev_err(&port->dev, "usb-role-switch not found for %s mode",
746 modes[usb2->mode]);
747 return -EINVAL;
748 }
749 }
750
751 usb2->supply = regulator_get(&port->dev, "vbus");
752 return PTR_ERR_OR_ZERO(usb2->supply);
753}
754
755static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
756 unsigned int index)
757{
758 struct tegra_xusb_usb2_port *usb2;
759 struct device_node *np;
760 int err = 0;
761
762 /*
763 * USB2 ports don't require additional properties, but if the port is
764 * marked as disabled there is no reason to register it.
765 */
766 np = tegra_xusb_find_port_node(padctl, "usb2", index);
767 if (!np || !of_device_is_available(np))
768 goto out;
769
770 usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL);
771 if (!usb2) {
772 err = -ENOMEM;
773 goto out;
774 }
775
776 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
777 if (err < 0)
778 goto out;
779
780 usb2->base.ops = padctl->soc->ports.usb2.ops;
781
782 usb2->base.lane = usb2->base.ops->map(&usb2->base);
783 if (IS_ERR(usb2->base.lane)) {
784 err = PTR_ERR(usb2->base.lane);
785 goto out;
786 }
787
788 err = tegra_xusb_usb2_port_parse_dt(usb2);
789 if (err < 0) {
790 tegra_xusb_port_unregister(&usb2->base);
791 goto out;
792 }
793
794 list_add_tail(&usb2->base.list, &padctl->ports);
795
796out:
797 of_node_put(np);
798 return err;
799}
800
801void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port)
802{
803 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
804
805 kfree(usb2);
806}
807
808void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port)
809{
810 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
811
812 regulator_put(usb2->supply);
813}
814
815static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
816{
817 struct tegra_xusb_port *port = &ulpi->base;
818 struct device_node *np = port->dev.of_node;
819
820 ulpi->internal = of_property_read_bool(np, "nvidia,internal");
821
822 return 0;
823}
824
825static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
826 unsigned int index)
827{
828 struct tegra_xusb_ulpi_port *ulpi;
829 struct device_node *np;
830 int err = 0;
831
832 np = tegra_xusb_find_port_node(padctl, "ulpi", index);
833 if (!np || !of_device_is_available(np))
834 goto out;
835
836 ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
837 if (!ulpi) {
838 err = -ENOMEM;
839 goto out;
840 }
841
842 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
843 if (err < 0)
844 goto out;
845
846 ulpi->base.ops = padctl->soc->ports.ulpi.ops;
847
848 ulpi->base.lane = ulpi->base.ops->map(&ulpi->base);
849 if (IS_ERR(ulpi->base.lane)) {
850 err = PTR_ERR(ulpi->base.lane);
851 goto out;
852 }
853
854 err = tegra_xusb_ulpi_port_parse_dt(ulpi);
855 if (err < 0) {
856 tegra_xusb_port_unregister(&ulpi->base);
857 goto out;
858 }
859
860 list_add_tail(&ulpi->base.list, &padctl->ports);
861
862out:
863 of_node_put(np);
864 return err;
865}
866
867void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port)
868{
869 struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port);
870
871 kfree(ulpi);
872}
873
874static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
875{
876 /* XXX */
877 return 0;
878}
879
880static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
881 unsigned int index)
882{
883 struct tegra_xusb_hsic_port *hsic;
884 struct device_node *np;
885 int err = 0;
886
887 np = tegra_xusb_find_port_node(padctl, "hsic", index);
888 if (!np || !of_device_is_available(np))
889 goto out;
890
891 hsic = kzalloc(sizeof(*hsic), GFP_KERNEL);
892 if (!hsic) {
893 err = -ENOMEM;
894 goto out;
895 }
896
897 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
898 if (err < 0)
899 goto out;
900
901 hsic->base.ops = padctl->soc->ports.hsic.ops;
902
903 hsic->base.lane = hsic->base.ops->map(&hsic->base);
904 if (IS_ERR(hsic->base.lane)) {
905 err = PTR_ERR(hsic->base.lane);
906 goto out;
907 }
908
909 err = tegra_xusb_hsic_port_parse_dt(hsic);
910 if (err < 0) {
911 tegra_xusb_port_unregister(&hsic->base);
912 goto out;
913 }
914
915 list_add_tail(&hsic->base.list, &padctl->ports);
916
917out:
918 of_node_put(np);
919 return err;
920}
921
922void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port)
923{
924 struct tegra_xusb_hsic_port *hsic = to_hsic_port(port);
925
926 kfree(hsic);
927}
928
929static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
930{
931 struct tegra_xusb_port *port = &usb3->base;
932 struct device_node *np = port->dev.of_node;
933 enum usb_device_speed maximum_speed;
934 u32 value;
935 int err;
936
937 err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
938 if (err < 0) {
939 dev_err(&port->dev, "failed to read port: %d\n", err);
940 return err;
941 }
942
943 usb3->port = value;
944
945 usb3->internal = of_property_read_bool(np, "nvidia,internal");
946
947 if (device_property_present(&port->dev, "maximum-speed")) {
948 maximum_speed = usb_get_maximum_speed(&port->dev);
949 if (maximum_speed == USB_SPEED_SUPER)
950 usb3->disable_gen2 = true;
951 else if (maximum_speed == USB_SPEED_SUPER_PLUS)
952 usb3->disable_gen2 = false;
953 else
954 return -EINVAL;
955 }
956
957 return 0;
958}
959
960static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
961 unsigned int index)
962{
963 struct tegra_xusb_usb3_port *usb3;
964 struct device_node *np;
965 int err = 0;
966
967 /*
968 * If there is no supplemental configuration in the device tree the
969 * port is unusable. But it is valid to configure only a single port,
970 * hence return 0 instead of an error to allow ports to be optional.
971 */
972 np = tegra_xusb_find_port_node(padctl, "usb3", index);
973 if (!np || !of_device_is_available(np))
974 goto out;
975
976 usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL);
977 if (!usb3) {
978 err = -ENOMEM;
979 goto out;
980 }
981
982 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
983 if (err < 0)
984 goto out;
985
986 usb3->base.ops = padctl->soc->ports.usb3.ops;
987
988 usb3->base.lane = usb3->base.ops->map(&usb3->base);
989 if (IS_ERR(usb3->base.lane)) {
990 err = PTR_ERR(usb3->base.lane);
991 goto out;
992 }
993
994 err = tegra_xusb_usb3_port_parse_dt(usb3);
995 if (err < 0) {
996 tegra_xusb_port_unregister(&usb3->base);
997 goto out;
998 }
999
1000 list_add_tail(&usb3->base.list, &padctl->ports);
1001
1002out:
1003 of_node_put(np);
1004 return err;
1005}
1006
1007void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port)
1008{
1009 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port);
1010
1011 kfree(usb3);
1012}
1013
1014static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1015{
1016 struct tegra_xusb_port *port, *tmp;
1017
1018 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
1019 list_del(&port->list);
1020 tegra_xusb_port_unregister(port);
1021 }
1022}
1023
1024static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl)
1025{
1026 struct device_node *np;
1027 unsigned int i;
1028
1029 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1030 np = tegra_xusb_find_port_node(padctl, "usb3", i);
1031 if (!np || !of_device_is_available(np))
1032 return i;
1033 }
1034
1035 return -ENODEV;
1036}
1037
1038static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2)
1039{
1040 unsigned int i;
1041 struct tegra_xusb_usb3_port *usb3;
1042 struct tegra_xusb_padctl *padctl = usb2->base.padctl;
1043
1044 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1045 usb3 = tegra_xusb_find_usb3_port(padctl, i);
1046 if (usb3 && usb3->port == usb2->base.index)
1047 return true;
1048 }
1049
1050 return false;
1051}
1052
1053static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2)
1054{
1055 int fake;
1056
1057 /* Disable usb3_port_fake usage by default and assign if needed */
1058 usb2->usb3_port_fake = -1;
1059
1060 if ((usb2->mode == USB_DR_MODE_OTG ||
1061 usb2->mode == USB_DR_MODE_PERIPHERAL) &&
1062 !tegra_xusb_port_is_companion(usb2)) {
1063 fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl);
1064 if (fake < 0) {
1065 dev_err(&usb2->base.dev, "no unused USB3 ports available\n");
1066 return -ENODEV;
1067 }
1068
1069 dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake);
1070 usb2->usb3_port_fake = fake;
1071 }
1072
1073 return 0;
1074}
1075
1076static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
1077{
1078 struct tegra_xusb_port *port;
1079 struct tegra_xusb_usb2_port *usb2;
1080 unsigned int i;
1081 int err = 0;
1082
1083 mutex_lock(&padctl->lock);
1084
1085 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1086 err = tegra_xusb_add_usb2_port(padctl, i);
1087 if (err < 0)
1088 goto remove_ports;
1089 }
1090
1091 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
1092 err = tegra_xusb_add_ulpi_port(padctl, i);
1093 if (err < 0)
1094 goto remove_ports;
1095 }
1096
1097 for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
1098 err = tegra_xusb_add_hsic_port(padctl, i);
1099 if (err < 0)
1100 goto remove_ports;
1101 }
1102
1103 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1104 err = tegra_xusb_add_usb3_port(padctl, i);
1105 if (err < 0)
1106 goto remove_ports;
1107 }
1108
1109 if (padctl->soc->need_fake_usb3_port) {
1110 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1111 usb2 = tegra_xusb_find_usb2_port(padctl, i);
1112 if (!usb2)
1113 continue;
1114
1115 err = tegra_xusb_update_usb3_fake_port(usb2);
1116 if (err < 0)
1117 goto remove_ports;
1118 }
1119 }
1120
1121 list_for_each_entry(port, &padctl->ports, list) {
1122 err = port->ops->enable(port);
1123 if (err < 0)
1124 dev_err(padctl->dev, "failed to enable port %s: %d\n",
1125 dev_name(&port->dev), err);
1126 }
1127
1128 goto unlock;
1129
1130remove_ports:
1131 __tegra_xusb_remove_ports(padctl);
1132unlock:
1133 mutex_unlock(&padctl->lock);
1134 return err;
1135}
1136
1137static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1138{
1139 mutex_lock(&padctl->lock);
1140 __tegra_xusb_remove_ports(padctl);
1141 mutex_unlock(&padctl->lock);
1142}
1143
1144static int tegra_xusb_padctl_probe(struct platform_device *pdev)
1145{
1146 struct device_node *np = pdev->dev.of_node;
1147 const struct tegra_xusb_padctl_soc *soc;
1148 struct tegra_xusb_padctl *padctl;
1149 const struct of_device_id *match;
1150 int err;
1151
1152 /* for backwards compatibility with old device trees */
1153 np = of_get_child_by_name(np, "pads");
1154 if (!np) {
1155 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
1156 return tegra_xusb_padctl_legacy_probe(pdev);
1157 }
1158
1159 of_node_put(np);
1160
1161 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
1162 soc = match->data;
1163
1164 padctl = soc->ops->probe(&pdev->dev, soc);
1165 if (IS_ERR(padctl))
1166 return PTR_ERR(padctl);
1167
1168 platform_set_drvdata(pdev, padctl);
1169 INIT_LIST_HEAD(&padctl->ports);
1170 INIT_LIST_HEAD(&padctl->lanes);
1171 INIT_LIST_HEAD(&padctl->pads);
1172 mutex_init(&padctl->lock);
1173
1174 padctl->regs = devm_platform_ioremap_resource(pdev, 0);
1175 if (IS_ERR(padctl->regs)) {
1176 err = PTR_ERR(padctl->regs);
1177 goto remove;
1178 }
1179
1180 padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
1181 if (IS_ERR(padctl->rst)) {
1182 err = PTR_ERR(padctl->rst);
1183 goto remove;
1184 }
1185
1186 padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
1187 sizeof(*padctl->supplies), GFP_KERNEL);
1188 if (!padctl->supplies) {
1189 err = -ENOMEM;
1190 goto remove;
1191 }
1192
1193 regulator_bulk_set_supply_names(padctl->supplies,
1194 padctl->soc->supply_names,
1195 padctl->soc->num_supplies);
1196
1197 err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
1198 padctl->supplies);
1199 if (err < 0) {
1200 dev_err_probe(&pdev->dev, err, "failed to get regulators\n");
1201 goto remove;
1202 }
1203
1204 err = reset_control_deassert(padctl->rst);
1205 if (err < 0)
1206 goto remove;
1207
1208 err = regulator_bulk_enable(padctl->soc->num_supplies,
1209 padctl->supplies);
1210 if (err < 0) {
1211 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
1212 goto reset;
1213 }
1214
1215 err = tegra_xusb_setup_pads(padctl);
1216 if (err < 0) {
1217 dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
1218 goto power_down;
1219 }
1220
1221 err = tegra_xusb_setup_ports(padctl);
1222 if (err) {
1223 const char *level = KERN_ERR;
1224
1225 if (err == -EPROBE_DEFER)
1226 level = KERN_DEBUG;
1227
1228 dev_printk(level, &pdev->dev,
1229 dev_fmt("failed to setup XUSB ports: %d\n"), err);
1230 goto remove_pads;
1231 }
1232
1233 return 0;
1234
1235remove_pads:
1236 tegra_xusb_remove_pads(padctl);
1237power_down:
1238 regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
1239reset:
1240 reset_control_assert(padctl->rst);
1241remove:
1242 platform_set_drvdata(pdev, NULL);
1243 soc->ops->remove(padctl);
1244 return err;
1245}
1246
1247static int tegra_xusb_padctl_remove(struct platform_device *pdev)
1248{
1249 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
1250 int err;
1251
1252 tegra_xusb_remove_ports(padctl);
1253 tegra_xusb_remove_pads(padctl);
1254
1255 err = regulator_bulk_disable(padctl->soc->num_supplies,
1256 padctl->supplies);
1257 if (err < 0)
1258 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
1259
1260 err = reset_control_assert(padctl->rst);
1261 if (err < 0)
1262 dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
1263
1264 padctl->soc->ops->remove(padctl);
1265
1266 return 0;
1267}
1268
1269static __maybe_unused int tegra_xusb_padctl_suspend_noirq(struct device *dev)
1270{
1271 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
1272
1273 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq)
1274 return padctl->soc->ops->suspend_noirq(padctl);
1275
1276 return 0;
1277}
1278
1279static __maybe_unused int tegra_xusb_padctl_resume_noirq(struct device *dev)
1280{
1281 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
1282
1283 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq)
1284 return padctl->soc->ops->resume_noirq(padctl);
1285
1286 return 0;
1287}
1288
1289static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = {
1290 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq,
1291 tegra_xusb_padctl_resume_noirq)
1292};
1293
1294static struct platform_driver tegra_xusb_padctl_driver = {
1295 .driver = {
1296 .name = "tegra-xusb-padctl",
1297 .of_match_table = tegra_xusb_padctl_of_match,
1298 .pm = &tegra_xusb_padctl_pm_ops,
1299 },
1300 .probe = tegra_xusb_padctl_probe,
1301 .remove = tegra_xusb_padctl_remove,
1302};
1303module_platform_driver(tegra_xusb_padctl_driver);
1304
1305struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
1306{
1307 struct tegra_xusb_padctl *padctl;
1308 struct platform_device *pdev;
1309 struct device_node *np;
1310
1311 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
1312 if (!np)
1313 return ERR_PTR(-EINVAL);
1314
1315 /*
1316 * This is slightly ugly. A better implementation would be to keep a
1317 * registry of pad controllers, but since there will almost certainly
1318 * only ever be one per SoC that would be a little overkill.
1319 */
1320 pdev = of_find_device_by_node(np);
1321 if (!pdev) {
1322 of_node_put(np);
1323 return ERR_PTR(-ENODEV);
1324 }
1325
1326 of_node_put(np);
1327
1328 padctl = platform_get_drvdata(pdev);
1329 if (!padctl) {
1330 put_device(&pdev->dev);
1331 return ERR_PTR(-EPROBE_DEFER);
1332 }
1333
1334 return padctl;
1335}
1336EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
1337
1338void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
1339{
1340 if (padctl)
1341 put_device(padctl->dev);
1342}
1343EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
1344
1345int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
1346 unsigned int port)
1347{
1348 if (padctl->soc->ops->usb3_save_context)
1349 return padctl->soc->ops->usb3_save_context(padctl, port);
1350
1351 return -ENOSYS;
1352}
1353EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
1354
1355int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
1356 unsigned int port, bool idle)
1357{
1358 if (padctl->soc->ops->hsic_set_idle)
1359 return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
1360
1361 return -ENOSYS;
1362}
1363EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
1364
1365int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy,
1366 enum usb_device_speed speed)
1367{
1368 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1369
1370 if (lane->pad->ops->enable_phy_sleepwalk)
1371 return lane->pad->ops->enable_phy_sleepwalk(lane, speed);
1372
1373 return -EOPNOTSUPP;
1374}
1375EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk);
1376
1377int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy)
1378{
1379 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1380
1381 if (lane->pad->ops->disable_phy_sleepwalk)
1382 return lane->pad->ops->disable_phy_sleepwalk(lane);
1383
1384 return -EOPNOTSUPP;
1385}
1386EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk);
1387
1388int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
1389{
1390 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1391
1392 if (lane->pad->ops->enable_phy_wake)
1393 return lane->pad->ops->enable_phy_wake(lane);
1394
1395 return -EOPNOTSUPP;
1396}
1397EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake);
1398
1399int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
1400{
1401 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1402
1403 if (lane->pad->ops->disable_phy_wake)
1404 return lane->pad->ops->disable_phy_wake(lane);
1405
1406 return -EOPNOTSUPP;
1407}
1408EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake);
1409
1410bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy)
1411{
1412 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1413
1414 if (lane->pad->ops->remote_wake_detected)
1415 return lane->pad->ops->remote_wake_detected(lane);
1416
1417 return false;
1418}
1419EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected);
1420
1421int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
1422 unsigned int port, bool enable)
1423{
1424 if (padctl->soc->ops->usb3_set_lfps_detect)
1425 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
1426 enable);
1427
1428 return -ENOSYS;
1429}
1430EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
1431
1432int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
1433 bool val)
1434{
1435 if (padctl->soc->ops->vbus_override)
1436 return padctl->soc->ops->vbus_override(padctl, val);
1437
1438 return -ENOTSUPP;
1439}
1440EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override);
1441
1442int tegra_phy_xusb_utmi_port_reset(struct phy *phy)
1443{
1444 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1445 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
1446
1447 if (padctl->soc->ops->utmi_port_reset)
1448 return padctl->soc->ops->utmi_port_reset(phy);
1449
1450 return -ENOTSUPP;
1451}
1452EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset);
1453
1454void tegra_phy_xusb_utmi_pad_power_on(struct phy *phy)
1455{
1456 struct tegra_xusb_lane *lane;
1457 struct tegra_xusb_padctl *padctl;
1458
1459 if (!phy)
1460 return;
1461
1462 lane = phy_get_drvdata(phy);
1463 padctl = lane->pad->padctl;
1464
1465 if (padctl->soc->ops->utmi_pad_power_on)
1466 padctl->soc->ops->utmi_pad_power_on(phy);
1467}
1468EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_on);
1469
1470void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy)
1471{
1472 struct tegra_xusb_lane *lane;
1473 struct tegra_xusb_padctl *padctl;
1474
1475 if (!phy)
1476 return;
1477
1478 lane = phy_get_drvdata(phy);
1479 padctl = lane->pad->padctl;
1480
1481 if (padctl->soc->ops->utmi_pad_power_down)
1482 padctl->soc->ops->utmi_pad_power_down(phy);
1483}
1484EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_down);
1485
1486int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
1487 unsigned int port)
1488{
1489 struct tegra_xusb_usb2_port *usb2;
1490 struct tegra_xusb_usb3_port *usb3;
1491 int i;
1492
1493 usb2 = tegra_xusb_find_usb2_port(padctl, port);
1494 if (!usb2)
1495 return -EINVAL;
1496
1497 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1498 usb3 = tegra_xusb_find_usb3_port(padctl, i);
1499 if (usb3 && usb3->port == usb2->base.index)
1500 return usb3->base.index;
1501 }
1502
1503 return -ENODEV;
1504}
1505EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
1506
1507MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
1508MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
1509MODULE_LICENSE("GPL v2");
1/*
2 * Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 */
13
14#include <linux/delay.h>
15#include <linux/io.h>
16#include <linux/mailbox_client.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/of_device.h>
20#include <linux/phy/phy.h>
21#include <linux/phy/tegra/xusb.h>
22#include <linux/platform_device.h>
23#include <linux/regulator/consumer.h>
24#include <linux/reset.h>
25#include <linux/slab.h>
26#include <linux/workqueue.h>
27
28#include <soc/tegra/fuse.h>
29
30#include "xusb.h"
31
32static struct phy *tegra_xusb_pad_of_xlate(struct device *dev,
33 struct of_phandle_args *args)
34{
35 struct tegra_xusb_pad *pad = dev_get_drvdata(dev);
36 struct phy *phy = NULL;
37 unsigned int i;
38
39 if (args->args_count != 0)
40 return ERR_PTR(-EINVAL);
41
42 for (i = 0; i < pad->soc->num_lanes; i++) {
43 if (!pad->lanes[i])
44 continue;
45
46 if (pad->lanes[i]->dev.of_node == args->np) {
47 phy = pad->lanes[i];
48 break;
49 }
50 }
51
52 if (phy == NULL)
53 phy = ERR_PTR(-ENODEV);
54
55 return phy;
56}
57
58static const struct of_device_id tegra_xusb_padctl_of_match[] = {
59#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
60 {
61 .compatible = "nvidia,tegra124-xusb-padctl",
62 .data = &tegra124_xusb_padctl_soc,
63 },
64#endif
65#if defined(CONFIG_ARCH_TEGRA_210_SOC)
66 {
67 .compatible = "nvidia,tegra210-xusb-padctl",
68 .data = &tegra210_xusb_padctl_soc,
69 },
70#endif
71 { }
72};
73MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
74
75static struct device_node *
76tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
77{
78 struct device_node *pads, *np;
79
80 pads = of_get_child_by_name(padctl->dev->of_node, "pads");
81 if (!pads)
82 return NULL;
83
84 np = of_get_child_by_name(pads, name);
85 of_node_put(pads);
86
87 return np;
88}
89
90static struct device_node *
91tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
92{
93 struct device_node *np, *lanes;
94
95 lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
96 if (!lanes)
97 return NULL;
98
99 np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
100 of_node_put(lanes);
101
102 return np;
103}
104
105static int
106tegra_xusb_lane_lookup_function(struct tegra_xusb_lane *lane,
107 const char *function)
108{
109 unsigned int i;
110
111 for (i = 0; i < lane->soc->num_funcs; i++)
112 if (strcmp(function, lane->soc->funcs[i]) == 0)
113 return i;
114
115 return -EINVAL;
116}
117
118int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
119 struct device_node *np)
120{
121 struct device *dev = &lane->pad->dev;
122 const char *function;
123 int err;
124
125 err = of_property_read_string(np, "nvidia,function", &function);
126 if (err < 0)
127 return err;
128
129 err = tegra_xusb_lane_lookup_function(lane, function);
130 if (err < 0) {
131 dev_err(dev, "invalid function \"%s\" for lane \"%s\"\n",
132 function, np->name);
133 return err;
134 }
135
136 lane->function = err;
137
138 return 0;
139}
140
141static void tegra_xusb_lane_destroy(struct phy *phy)
142{
143 if (phy) {
144 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
145
146 lane->pad->ops->remove(lane);
147 phy_destroy(phy);
148 }
149}
150
151static void tegra_xusb_pad_release(struct device *dev)
152{
153 struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
154
155 pad->soc->ops->remove(pad);
156}
157
158static struct device_type tegra_xusb_pad_type = {
159 .release = tegra_xusb_pad_release,
160};
161
162int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
163 struct tegra_xusb_padctl *padctl,
164 struct device_node *np)
165{
166 int err;
167
168 device_initialize(&pad->dev);
169 INIT_LIST_HEAD(&pad->list);
170 pad->dev.parent = padctl->dev;
171 pad->dev.type = &tegra_xusb_pad_type;
172 pad->dev.of_node = np;
173 pad->padctl = padctl;
174
175 err = dev_set_name(&pad->dev, "%s", pad->soc->name);
176 if (err < 0)
177 goto unregister;
178
179 err = device_add(&pad->dev);
180 if (err < 0)
181 goto unregister;
182
183 return 0;
184
185unregister:
186 device_unregister(&pad->dev);
187 return err;
188}
189
190int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
191 const struct phy_ops *ops)
192{
193 struct device_node *children;
194 struct phy *lane;
195 unsigned int i;
196 int err;
197
198 children = of_get_child_by_name(pad->dev.of_node, "lanes");
199 if (!children)
200 return -ENODEV;
201
202 pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
203 GFP_KERNEL);
204 if (!pad->lanes) {
205 of_node_put(children);
206 return -ENOMEM;
207 }
208
209 for (i = 0; i < pad->soc->num_lanes; i++) {
210 struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i);
211 struct tegra_xusb_lane *lane;
212
213 /* skip disabled lanes */
214 if (!np || !of_device_is_available(np)) {
215 of_node_put(np);
216 continue;
217 }
218
219 pad->lanes[i] = phy_create(&pad->dev, np, ops);
220 if (IS_ERR(pad->lanes[i])) {
221 err = PTR_ERR(pad->lanes[i]);
222 of_node_put(np);
223 goto remove;
224 }
225
226 lane = pad->ops->probe(pad, np, i);
227 if (IS_ERR(lane)) {
228 phy_destroy(pad->lanes[i]);
229 err = PTR_ERR(lane);
230 goto remove;
231 }
232
233 list_add_tail(&lane->list, &pad->padctl->lanes);
234 phy_set_drvdata(pad->lanes[i], lane);
235 }
236
237 pad->provider = of_phy_provider_register_full(&pad->dev, children,
238 tegra_xusb_pad_of_xlate);
239 if (IS_ERR(pad->provider)) {
240 err = PTR_ERR(pad->provider);
241 goto remove;
242 }
243
244 return 0;
245
246remove:
247 while (i--)
248 tegra_xusb_lane_destroy(pad->lanes[i]);
249
250 of_node_put(children);
251
252 return err;
253}
254
255void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
256{
257 unsigned int i = pad->soc->num_lanes;
258
259 of_phy_provider_unregister(pad->provider);
260
261 while (i--)
262 tegra_xusb_lane_destroy(pad->lanes[i]);
263
264 device_unregister(&pad->dev);
265}
266
267static struct tegra_xusb_pad *
268tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
269 const struct tegra_xusb_pad_soc *soc)
270{
271 struct tegra_xusb_pad *pad;
272 struct device_node *np;
273 int err;
274
275 np = tegra_xusb_find_pad_node(padctl, soc->name);
276 if (!np || !of_device_is_available(np))
277 return NULL;
278
279 pad = soc->ops->probe(padctl, soc, np);
280 if (IS_ERR(pad)) {
281 err = PTR_ERR(pad);
282 dev_err(padctl->dev, "failed to create pad %s: %d\n",
283 soc->name, err);
284 return ERR_PTR(err);
285 }
286
287 /* XXX move this into ->probe() to avoid string comparison */
288 if (strcmp(soc->name, "pcie") == 0)
289 padctl->pcie = pad;
290
291 if (strcmp(soc->name, "sata") == 0)
292 padctl->sata = pad;
293
294 if (strcmp(soc->name, "usb2") == 0)
295 padctl->usb2 = pad;
296
297 if (strcmp(soc->name, "ulpi") == 0)
298 padctl->ulpi = pad;
299
300 if (strcmp(soc->name, "hsic") == 0)
301 padctl->hsic = pad;
302
303 return pad;
304}
305
306static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
307{
308 struct tegra_xusb_pad *pad, *tmp;
309
310 list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
311 list_del(&pad->list);
312 tegra_xusb_pad_unregister(pad);
313 }
314}
315
316static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
317{
318 mutex_lock(&padctl->lock);
319 __tegra_xusb_remove_pads(padctl);
320 mutex_unlock(&padctl->lock);
321}
322
323static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
324{
325 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
326 const struct tegra_xusb_lane_soc *soc = lane->soc;
327 u32 value;
328
329 /* choose function */
330 value = padctl_readl(padctl, soc->offset);
331 value &= ~(soc->mask << soc->shift);
332 value |= lane->function << soc->shift;
333 padctl_writel(padctl, value, soc->offset);
334}
335
336static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
337{
338 unsigned int i;
339
340 for (i = 0; i < pad->soc->num_lanes; i++) {
341 struct tegra_xusb_lane *lane;
342
343 if (pad->lanes[i]) {
344 lane = phy_get_drvdata(pad->lanes[i]);
345 tegra_xusb_lane_program(lane);
346 }
347 }
348}
349
350static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
351{
352 struct tegra_xusb_pad *pad;
353 unsigned int i;
354
355 mutex_lock(&padctl->lock);
356
357 for (i = 0; i < padctl->soc->num_pads; i++) {
358 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
359 int err;
360
361 pad = tegra_xusb_pad_create(padctl, soc);
362 if (IS_ERR(pad)) {
363 err = PTR_ERR(pad);
364 dev_err(padctl->dev, "failed to create pad %s: %d\n",
365 soc->name, err);
366 __tegra_xusb_remove_pads(padctl);
367 mutex_unlock(&padctl->lock);
368 return err;
369 }
370
371 if (!pad)
372 continue;
373
374 list_add_tail(&pad->list, &padctl->pads);
375 }
376
377 list_for_each_entry(pad, &padctl->pads, list)
378 tegra_xusb_pad_program(pad);
379
380 mutex_unlock(&padctl->lock);
381 return 0;
382}
383
384static bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
385 const char *function)
386{
387 const char *func = lane->soc->funcs[lane->function];
388
389 return strcmp(function, func) == 0;
390}
391
392struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
393 const char *type,
394 unsigned int index)
395{
396 struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
397 char *name;
398
399 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
400 if (!name)
401 return ERR_PTR(-ENOMEM);
402
403 list_for_each_entry(lane, &padctl->lanes, list) {
404 if (strcmp(lane->soc->name, name) == 0) {
405 hit = lane;
406 break;
407 }
408 }
409
410 kfree(name);
411 return hit;
412}
413
414struct tegra_xusb_lane *
415tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
416 const struct tegra_xusb_lane_map *map,
417 const char *function)
418{
419 struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
420
421 for (; map->type; map++) {
422 if (port->index != map->port)
423 continue;
424
425 lane = tegra_xusb_find_lane(port->padctl, map->type,
426 map->index);
427 if (IS_ERR(lane))
428 continue;
429
430 if (!tegra_xusb_lane_check(lane, function))
431 continue;
432
433 if (!IS_ERR(match))
434 dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
435 map->type, map->index, match->soc->name);
436 else
437 match = lane;
438 }
439
440 return match;
441}
442
443static struct device_node *
444tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
445 unsigned int index)
446{
447 struct device_node *ports, *np;
448 char *name;
449
450 ports = of_get_child_by_name(padctl->dev->of_node, "ports");
451 if (!ports)
452 return NULL;
453
454 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
455 if (!name) {
456 of_node_put(ports);
457 return ERR_PTR(-ENOMEM);
458 }
459 np = of_get_child_by_name(ports, name);
460 kfree(name);
461 of_node_put(ports);
462
463 return np;
464}
465
466struct tegra_xusb_port *
467tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
468 unsigned int index)
469{
470 struct tegra_xusb_port *port;
471 struct device_node *np;
472
473 np = tegra_xusb_find_port_node(padctl, type, index);
474 if (!np)
475 return NULL;
476
477 list_for_each_entry(port, &padctl->ports, list) {
478 if (np == port->dev.of_node) {
479 of_node_put(np);
480 return port;
481 }
482 }
483
484 of_node_put(np);
485
486 return NULL;
487}
488
489struct tegra_xusb_usb2_port *
490tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
491{
492 struct tegra_xusb_port *port;
493
494 port = tegra_xusb_find_port(padctl, "usb2", index);
495 if (port)
496 return to_usb2_port(port);
497
498 return NULL;
499}
500
501struct tegra_xusb_usb3_port *
502tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
503{
504 struct tegra_xusb_port *port;
505
506 port = tegra_xusb_find_port(padctl, "usb3", index);
507 if (port)
508 return to_usb3_port(port);
509
510 return NULL;
511}
512
513static void tegra_xusb_port_release(struct device *dev)
514{
515}
516
517static struct device_type tegra_xusb_port_type = {
518 .release = tegra_xusb_port_release,
519};
520
521static int tegra_xusb_port_init(struct tegra_xusb_port *port,
522 struct tegra_xusb_padctl *padctl,
523 struct device_node *np,
524 const char *name,
525 unsigned int index)
526{
527 int err;
528
529 INIT_LIST_HEAD(&port->list);
530 port->padctl = padctl;
531 port->index = index;
532
533 device_initialize(&port->dev);
534 port->dev.type = &tegra_xusb_port_type;
535 port->dev.of_node = of_node_get(np);
536 port->dev.parent = padctl->dev;
537
538 err = dev_set_name(&port->dev, "%s-%u", name, index);
539 if (err < 0)
540 goto unregister;
541
542 err = device_add(&port->dev);
543 if (err < 0)
544 goto unregister;
545
546 return 0;
547
548unregister:
549 device_unregister(&port->dev);
550 return err;
551}
552
553static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
554{
555 device_unregister(&port->dev);
556}
557
558static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
559{
560 struct tegra_xusb_port *port = &usb2->base;
561 struct device_node *np = port->dev.of_node;
562
563 usb2->internal = of_property_read_bool(np, "nvidia,internal");
564
565 usb2->supply = devm_regulator_get(&port->dev, "vbus");
566 return PTR_ERR_OR_ZERO(usb2->supply);
567}
568
569static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
570 unsigned int index)
571{
572 struct tegra_xusb_usb2_port *usb2;
573 struct device_node *np;
574 int err = 0;
575
576 /*
577 * USB2 ports don't require additional properties, but if the port is
578 * marked as disabled there is no reason to register it.
579 */
580 np = tegra_xusb_find_port_node(padctl, "usb2", index);
581 if (!np || !of_device_is_available(np))
582 goto out;
583
584 usb2 = devm_kzalloc(padctl->dev, sizeof(*usb2), GFP_KERNEL);
585 if (!usb2) {
586 err = -ENOMEM;
587 goto out;
588 }
589
590 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
591 if (err < 0)
592 goto out;
593
594 usb2->base.ops = padctl->soc->ports.usb2.ops;
595
596 usb2->base.lane = usb2->base.ops->map(&usb2->base);
597 if (IS_ERR(usb2->base.lane)) {
598 err = PTR_ERR(usb2->base.lane);
599 goto out;
600 }
601
602 err = tegra_xusb_usb2_port_parse_dt(usb2);
603 if (err < 0) {
604 tegra_xusb_port_unregister(&usb2->base);
605 goto out;
606 }
607
608 list_add_tail(&usb2->base.list, &padctl->ports);
609
610out:
611 of_node_put(np);
612 return err;
613}
614
615static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
616{
617 struct tegra_xusb_port *port = &ulpi->base;
618 struct device_node *np = port->dev.of_node;
619
620 ulpi->internal = of_property_read_bool(np, "nvidia,internal");
621
622 return 0;
623}
624
625static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
626 unsigned int index)
627{
628 struct tegra_xusb_ulpi_port *ulpi;
629 struct device_node *np;
630 int err = 0;
631
632 np = tegra_xusb_find_port_node(padctl, "ulpi", index);
633 if (!np || !of_device_is_available(np))
634 goto out;
635
636 ulpi = devm_kzalloc(padctl->dev, sizeof(*ulpi), GFP_KERNEL);
637 if (!ulpi) {
638 err = -ENOMEM;
639 goto out;
640 }
641
642 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
643 if (err < 0)
644 goto out;
645
646 ulpi->base.ops = padctl->soc->ports.ulpi.ops;
647
648 ulpi->base.lane = ulpi->base.ops->map(&ulpi->base);
649 if (IS_ERR(ulpi->base.lane)) {
650 err = PTR_ERR(ulpi->base.lane);
651 goto out;
652 }
653
654 err = tegra_xusb_ulpi_port_parse_dt(ulpi);
655 if (err < 0) {
656 tegra_xusb_port_unregister(&ulpi->base);
657 goto out;
658 }
659
660 list_add_tail(&ulpi->base.list, &padctl->ports);
661
662out:
663 of_node_put(np);
664 return err;
665}
666
667static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
668{
669 /* XXX */
670 return 0;
671}
672
673static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
674 unsigned int index)
675{
676 struct tegra_xusb_hsic_port *hsic;
677 struct device_node *np;
678 int err = 0;
679
680 np = tegra_xusb_find_port_node(padctl, "hsic", index);
681 if (!np || !of_device_is_available(np))
682 goto out;
683
684 hsic = devm_kzalloc(padctl->dev, sizeof(*hsic), GFP_KERNEL);
685 if (!hsic) {
686 err = -ENOMEM;
687 goto out;
688 }
689
690 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
691 if (err < 0)
692 goto out;
693
694 hsic->base.ops = padctl->soc->ports.hsic.ops;
695
696 hsic->base.lane = hsic->base.ops->map(&hsic->base);
697 if (IS_ERR(hsic->base.lane)) {
698 err = PTR_ERR(hsic->base.lane);
699 goto out;
700 }
701
702 err = tegra_xusb_hsic_port_parse_dt(hsic);
703 if (err < 0) {
704 tegra_xusb_port_unregister(&hsic->base);
705 goto out;
706 }
707
708 list_add_tail(&hsic->base.list, &padctl->ports);
709
710out:
711 of_node_put(np);
712 return err;
713}
714
715static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
716{
717 struct tegra_xusb_port *port = &usb3->base;
718 struct device_node *np = port->dev.of_node;
719 u32 value;
720 int err;
721
722 err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
723 if (err < 0) {
724 dev_err(&port->dev, "failed to read port: %d\n", err);
725 return err;
726 }
727
728 usb3->port = value;
729
730 usb3->internal = of_property_read_bool(np, "nvidia,internal");
731
732 usb3->supply = devm_regulator_get(&port->dev, "vbus");
733 return PTR_ERR_OR_ZERO(usb3->supply);
734}
735
736static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
737 unsigned int index)
738{
739 struct tegra_xusb_usb3_port *usb3;
740 struct device_node *np;
741 int err = 0;
742
743 /*
744 * If there is no supplemental configuration in the device tree the
745 * port is unusable. But it is valid to configure only a single port,
746 * hence return 0 instead of an error to allow ports to be optional.
747 */
748 np = tegra_xusb_find_port_node(padctl, "usb3", index);
749 if (!np || !of_device_is_available(np))
750 goto out;
751
752 usb3 = devm_kzalloc(padctl->dev, sizeof(*usb3), GFP_KERNEL);
753 if (!usb3) {
754 err = -ENOMEM;
755 goto out;
756 }
757
758 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
759 if (err < 0)
760 goto out;
761
762 usb3->base.ops = padctl->soc->ports.usb3.ops;
763
764 usb3->base.lane = usb3->base.ops->map(&usb3->base);
765 if (IS_ERR(usb3->base.lane)) {
766 err = PTR_ERR(usb3->base.lane);
767 goto out;
768 }
769
770 err = tegra_xusb_usb3_port_parse_dt(usb3);
771 if (err < 0) {
772 tegra_xusb_port_unregister(&usb3->base);
773 goto out;
774 }
775
776 list_add_tail(&usb3->base.list, &padctl->ports);
777
778out:
779 of_node_put(np);
780 return err;
781}
782
783static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
784{
785 struct tegra_xusb_port *port, *tmp;
786
787 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
788 list_del(&port->list);
789 tegra_xusb_port_unregister(port);
790 }
791}
792
793static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
794{
795 struct tegra_xusb_port *port;
796 unsigned int i;
797 int err = 0;
798
799 mutex_lock(&padctl->lock);
800
801 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
802 err = tegra_xusb_add_usb2_port(padctl, i);
803 if (err < 0)
804 goto remove_ports;
805 }
806
807 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
808 err = tegra_xusb_add_ulpi_port(padctl, i);
809 if (err < 0)
810 goto remove_ports;
811 }
812
813 for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
814 err = tegra_xusb_add_hsic_port(padctl, i);
815 if (err < 0)
816 goto remove_ports;
817 }
818
819 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
820 err = tegra_xusb_add_usb3_port(padctl, i);
821 if (err < 0)
822 goto remove_ports;
823 }
824
825 list_for_each_entry(port, &padctl->ports, list) {
826 err = port->ops->enable(port);
827 if (err < 0)
828 dev_err(padctl->dev, "failed to enable port %s: %d\n",
829 dev_name(&port->dev), err);
830 }
831
832 goto unlock;
833
834remove_ports:
835 __tegra_xusb_remove_ports(padctl);
836unlock:
837 mutex_unlock(&padctl->lock);
838 return err;
839}
840
841static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
842{
843 mutex_lock(&padctl->lock);
844 __tegra_xusb_remove_ports(padctl);
845 mutex_unlock(&padctl->lock);
846}
847
848static int tegra_xusb_padctl_probe(struct platform_device *pdev)
849{
850 struct device_node *np = pdev->dev.of_node;
851 const struct tegra_xusb_padctl_soc *soc;
852 struct tegra_xusb_padctl *padctl;
853 const struct of_device_id *match;
854 struct resource *res;
855 int err;
856
857 /* for backwards compatibility with old device trees */
858 np = of_get_child_by_name(np, "pads");
859 if (!np) {
860 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
861 return tegra_xusb_padctl_legacy_probe(pdev);
862 }
863
864 of_node_put(np);
865
866 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
867 soc = match->data;
868
869 padctl = soc->ops->probe(&pdev->dev, soc);
870 if (IS_ERR(padctl))
871 return PTR_ERR(padctl);
872
873 platform_set_drvdata(pdev, padctl);
874 INIT_LIST_HEAD(&padctl->ports);
875 INIT_LIST_HEAD(&padctl->lanes);
876 INIT_LIST_HEAD(&padctl->pads);
877 mutex_init(&padctl->lock);
878
879 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
880 padctl->regs = devm_ioremap_resource(&pdev->dev, res);
881 if (IS_ERR(padctl->regs)) {
882 err = PTR_ERR(padctl->regs);
883 goto remove;
884 }
885
886 padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
887 if (IS_ERR(padctl->rst)) {
888 err = PTR_ERR(padctl->rst);
889 goto remove;
890 }
891
892 err = reset_control_deassert(padctl->rst);
893 if (err < 0)
894 goto remove;
895
896 err = tegra_xusb_setup_pads(padctl);
897 if (err < 0) {
898 dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
899 goto reset;
900 }
901
902 err = tegra_xusb_setup_ports(padctl);
903 if (err) {
904 dev_err(&pdev->dev, "failed to setup XUSB ports: %d\n", err);
905 goto remove_pads;
906 }
907
908 return 0;
909
910remove_pads:
911 tegra_xusb_remove_pads(padctl);
912reset:
913 reset_control_assert(padctl->rst);
914remove:
915 soc->ops->remove(padctl);
916 return err;
917}
918
919static int tegra_xusb_padctl_remove(struct platform_device *pdev)
920{
921 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
922 int err;
923
924 tegra_xusb_remove_ports(padctl);
925 tegra_xusb_remove_pads(padctl);
926
927 err = reset_control_assert(padctl->rst);
928 if (err < 0)
929 dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
930
931 padctl->soc->ops->remove(padctl);
932
933 return err;
934}
935
936static struct platform_driver tegra_xusb_padctl_driver = {
937 .driver = {
938 .name = "tegra-xusb-padctl",
939 .of_match_table = tegra_xusb_padctl_of_match,
940 },
941 .probe = tegra_xusb_padctl_probe,
942 .remove = tegra_xusb_padctl_remove,
943};
944module_platform_driver(tegra_xusb_padctl_driver);
945
946struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
947{
948 struct tegra_xusb_padctl *padctl;
949 struct platform_device *pdev;
950 struct device_node *np;
951
952 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
953 if (!np)
954 return ERR_PTR(-EINVAL);
955
956 /*
957 * This is slightly ugly. A better implementation would be to keep a
958 * registry of pad controllers, but since there will almost certainly
959 * only ever be one per SoC that would be a little overkill.
960 */
961 pdev = of_find_device_by_node(np);
962 if (!pdev) {
963 of_node_put(np);
964 return ERR_PTR(-ENODEV);
965 }
966
967 of_node_put(np);
968
969 padctl = platform_get_drvdata(pdev);
970 if (!padctl) {
971 put_device(&pdev->dev);
972 return ERR_PTR(-EPROBE_DEFER);
973 }
974
975 return padctl;
976}
977EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
978
979void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
980{
981 if (padctl)
982 put_device(padctl->dev);
983}
984EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
985
986int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
987 unsigned int port)
988{
989 if (padctl->soc->ops->usb3_save_context)
990 return padctl->soc->ops->usb3_save_context(padctl, port);
991
992 return -ENOSYS;
993}
994EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
995
996int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
997 unsigned int port, bool idle)
998{
999 if (padctl->soc->ops->hsic_set_idle)
1000 return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
1001
1002 return -ENOSYS;
1003}
1004EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
1005
1006int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
1007 unsigned int port, bool enable)
1008{
1009 if (padctl->soc->ops->usb3_set_lfps_detect)
1010 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
1011 enable);
1012
1013 return -ENOSYS;
1014}
1015EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
1016
1017MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
1018MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
1019MODULE_LICENSE("GPL v2");