1
2
3
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 { }
70};
71MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
72
73static struct device_node *
74tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
75{
76 struct device_node *pads, *np;
77
78 pads = of_get_child_by_name(padctl->dev->of_node, "pads");
79 if (!pads)
80 return NULL;
81
82 np = of_get_child_by_name(pads, name);
83 of_node_put(pads);
84
85 return np;
86}
87
88static struct device_node *
89tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
90{
91 struct device_node *np, *lanes;
92
93 lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
94 if (!lanes)
95 return NULL;
96
97 np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
98 of_node_put(lanes);
99
100 return np;
101}
102
103int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
104 struct device_node *np)
105{
106 struct device *dev = &lane->pad->dev;
107 const char *function;
108 int err;
109
110 err = of_property_read_string(np, "nvidia,function", &function);
111 if (err < 0)
112 return err;
113
114 err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
115 if (err < 0) {
116 dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
117 function, np);
118 return err;
119 }
120
121 lane->function = err;
122
123 return 0;
124}
125
126static void tegra_xusb_lane_destroy(struct phy *phy)
127{
128 if (phy) {
129 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
130
131 lane->pad->ops->remove(lane);
132 phy_destroy(phy);
133 }
134}
135
136static void tegra_xusb_pad_release(struct device *dev)
137{
138 struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
139
140 pad->soc->ops->remove(pad);
141}
142
143static struct device_type tegra_xusb_pad_type = {
144 .release = tegra_xusb_pad_release,
145};
146
147int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
148 struct tegra_xusb_padctl *padctl,
149 struct device_node *np)
150{
151 int err;
152
153 device_initialize(&pad->dev);
154 INIT_LIST_HEAD(&pad->list);
155 pad->dev.parent = padctl->dev;
156 pad->dev.type = &tegra_xusb_pad_type;
157 pad->dev.of_node = np;
158 pad->padctl = padctl;
159
160 err = dev_set_name(&pad->dev, "%s", pad->soc->name);
161 if (err < 0)
162 goto unregister;
163
164 err = device_add(&pad->dev);
165 if (err < 0)
166 goto unregister;
167
168 return 0;
169
170unregister:
171 device_unregister(&pad->dev);
172 return err;
173}
174
175int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
176 const struct phy_ops *ops)
177{
178 struct device_node *children;
179 struct phy *lane;
180 unsigned int i;
181 int err;
182
183 children = of_get_child_by_name(pad->dev.of_node, "lanes");
184 if (!children)
185 return -ENODEV;
186
187 pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
188 GFP_KERNEL);
189 if (!pad->lanes) {
190 of_node_put(children);
191 return -ENOMEM;
192 }
193
194 for (i = 0; i < pad->soc->num_lanes; i++) {
195 struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i);
196 struct tegra_xusb_lane *lane;
197
198
199 if (!np || !of_device_is_available(np)) {
200 of_node_put(np);
201 continue;
202 }
203
204 pad->lanes[i] = phy_create(&pad->dev, np, ops);
205 if (IS_ERR(pad->lanes[i])) {
206 err = PTR_ERR(pad->lanes[i]);
207 of_node_put(np);
208 goto remove;
209 }
210
211 lane = pad->ops->probe(pad, np, i);
212 if (IS_ERR(lane)) {
213 phy_destroy(pad->lanes[i]);
214 err = PTR_ERR(lane);
215 goto remove;
216 }
217
218 list_add_tail(&lane->list, &pad->padctl->lanes);
219 phy_set_drvdata(pad->lanes[i], lane);
220 }
221
222 pad->provider = of_phy_provider_register_full(&pad->dev, children,
223 tegra_xusb_pad_of_xlate);
224 if (IS_ERR(pad->provider)) {
225 err = PTR_ERR(pad->provider);
226 goto remove;
227 }
228
229 return 0;
230
231remove:
232 while (i--)
233 tegra_xusb_lane_destroy(pad->lanes[i]);
234
235 of_node_put(children);
236
237 return err;
238}
239
240void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
241{
242 unsigned int i = pad->soc->num_lanes;
243
244 of_phy_provider_unregister(pad->provider);
245
246 while (i--)
247 tegra_xusb_lane_destroy(pad->lanes[i]);
248
249 device_unregister(&pad->dev);
250}
251
252static struct tegra_xusb_pad *
253tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
254 const struct tegra_xusb_pad_soc *soc)
255{
256 struct tegra_xusb_pad *pad;
257 struct device_node *np;
258 int err;
259
260 np = tegra_xusb_find_pad_node(padctl, soc->name);
261 if (!np || !of_device_is_available(np))
262 return NULL;
263
264 pad = soc->ops->probe(padctl, soc, np);
265 if (IS_ERR(pad)) {
266 err = PTR_ERR(pad);
267 dev_err(padctl->dev, "failed to create pad %s: %d\n",
268 soc->name, err);
269 return ERR_PTR(err);
270 }
271
272
273 if (strcmp(soc->name, "pcie") == 0)
274 padctl->pcie = pad;
275
276 if (strcmp(soc->name, "sata") == 0)
277 padctl->sata = pad;
278
279 if (strcmp(soc->name, "usb2") == 0)
280 padctl->usb2 = pad;
281
282 if (strcmp(soc->name, "ulpi") == 0)
283 padctl->ulpi = pad;
284
285 if (strcmp(soc->name, "hsic") == 0)
286 padctl->hsic = pad;
287
288 return pad;
289}
290
291static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
292{
293 struct tegra_xusb_pad *pad, *tmp;
294
295 list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
296 list_del(&pad->list);
297 tegra_xusb_pad_unregister(pad);
298 }
299}
300
301static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
302{
303 mutex_lock(&padctl->lock);
304 __tegra_xusb_remove_pads(padctl);
305 mutex_unlock(&padctl->lock);
306}
307
308static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
309{
310 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
311 const struct tegra_xusb_lane_soc *soc = lane->soc;
312 u32 value;
313
314
315 if (soc->num_funcs < 2)
316 return;
317
318
319 value = padctl_readl(padctl, soc->offset);
320 value &= ~(soc->mask << soc->shift);
321 value |= lane->function << soc->shift;
322 padctl_writel(padctl, value, soc->offset);
323}
324
325static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
326{
327 unsigned int i;
328
329 for (i = 0; i < pad->soc->num_lanes; i++) {
330 struct tegra_xusb_lane *lane;
331
332 if (pad->lanes[i]) {
333 lane = phy_get_drvdata(pad->lanes[i]);
334 tegra_xusb_lane_program(lane);
335 }
336 }
337}
338
339static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
340{
341 struct tegra_xusb_pad *pad;
342 unsigned int i;
343
344 mutex_lock(&padctl->lock);
345
346 for (i = 0; i < padctl->soc->num_pads; i++) {
347 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
348 int err;
349
350 pad = tegra_xusb_pad_create(padctl, soc);
351 if (IS_ERR(pad)) {
352 err = PTR_ERR(pad);
353 dev_err(padctl->dev, "failed to create pad %s: %d\n",
354 soc->name, err);
355 __tegra_xusb_remove_pads(padctl);
356 mutex_unlock(&padctl->lock);
357 return err;
358 }
359
360 if (!pad)
361 continue;
362
363 list_add_tail(&pad->list, &padctl->pads);
364 }
365
366 list_for_each_entry(pad, &padctl->pads, list)
367 tegra_xusb_pad_program(pad);
368
369 mutex_unlock(&padctl->lock);
370 return 0;
371}
372
373static bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
374 const char *function)
375{
376 const char *func = lane->soc->funcs[lane->function];
377
378 return strcmp(function, func) == 0;
379}
380
381struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
382 const char *type,
383 unsigned int index)
384{
385 struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
386 char *name;
387
388 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
389 if (!name)
390 return ERR_PTR(-ENOMEM);
391
392 list_for_each_entry(lane, &padctl->lanes, list) {
393 if (strcmp(lane->soc->name, name) == 0) {
394 hit = lane;
395 break;
396 }
397 }
398
399 kfree(name);
400 return hit;
401}
402
403struct tegra_xusb_lane *
404tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
405 const struct tegra_xusb_lane_map *map,
406 const char *function)
407{
408 struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
409
410 for (; map->type; map++) {
411 if (port->index != map->port)
412 continue;
413
414 lane = tegra_xusb_find_lane(port->padctl, map->type,
415 map->index);
416 if (IS_ERR(lane))
417 continue;
418
419 if (!tegra_xusb_lane_check(lane, function))
420 continue;
421
422 if (!IS_ERR(match))
423 dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
424 map->type, map->index, match->soc->name);
425 else
426 match = lane;
427 }
428
429 return match;
430}
431
432static struct device_node *
433tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
434 unsigned int index)
435{
436 struct device_node *ports, *np;
437 char *name;
438
439 ports = of_get_child_by_name(padctl->dev->of_node, "ports");
440 if (!ports)
441 return NULL;
442
443 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
444 if (!name) {
445 of_node_put(ports);
446 return ERR_PTR(-ENOMEM);
447 }
448 np = of_get_child_by_name(ports, name);
449 kfree(name);
450 of_node_put(ports);
451
452 return np;
453}
454
455struct tegra_xusb_port *
456tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
457 unsigned int index)
458{
459 struct tegra_xusb_port *port;
460 struct device_node *np;
461
462 np = tegra_xusb_find_port_node(padctl, type, index);
463 if (!np)
464 return NULL;
465
466 list_for_each_entry(port, &padctl->ports, list) {
467 if (np == port->dev.of_node) {
468 of_node_put(np);
469 return port;
470 }
471 }
472
473 of_node_put(np);
474
475 return NULL;
476}
477
478struct tegra_xusb_usb2_port *
479tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
480{
481 struct tegra_xusb_port *port;
482
483 port = tegra_xusb_find_port(padctl, "usb2", index);
484 if (port)
485 return to_usb2_port(port);
486
487 return NULL;
488}
489
490struct tegra_xusb_usb3_port *
491tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
492{
493 struct tegra_xusb_port *port;
494
495 port = tegra_xusb_find_port(padctl, "usb3", index);
496 if (port)
497 return to_usb3_port(port);
498
499 return NULL;
500}
501
502static void tegra_xusb_port_release(struct device *dev)
503{
504}
505
506static struct device_type tegra_xusb_port_type = {
507 .release = tegra_xusb_port_release,
508};
509
510static int tegra_xusb_port_init(struct tegra_xusb_port *port,
511 struct tegra_xusb_padctl *padctl,
512 struct device_node *np,
513 const char *name,
514 unsigned int index)
515{
516 int err;
517
518 INIT_LIST_HEAD(&port->list);
519 port->padctl = padctl;
520 port->index = index;
521
522 device_initialize(&port->dev);
523 port->dev.type = &tegra_xusb_port_type;
524 port->dev.of_node = of_node_get(np);
525 port->dev.parent = padctl->dev;
526
527 err = dev_set_name(&port->dev, "%s-%u", name, index);
528 if (err < 0)
529 goto unregister;
530
531 err = device_add(&port->dev);
532 if (err < 0)
533 goto unregister;
534
535 return 0;
536
537unregister:
538 device_unregister(&port->dev);
539 return err;
540}
541
542static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
543{
544 device_unregister(&port->dev);
545}
546
547static const char *const modes[] = {
548 [USB_DR_MODE_UNKNOWN] = "",
549 [USB_DR_MODE_HOST] = "host",
550 [USB_DR_MODE_PERIPHERAL] = "peripheral",
551 [USB_DR_MODE_OTG] = "otg",
552};
553
554static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
555{
556 struct tegra_xusb_port *port = &usb2->base;
557 struct device_node *np = port->dev.of_node;
558 const char *mode;
559
560 usb2->internal = of_property_read_bool(np, "nvidia,internal");
561
562 if (!of_property_read_string(np, "mode", &mode)) {
563 int err = match_string(modes, ARRAY_SIZE(modes), mode);
564 if (err < 0) {
565 dev_err(&port->dev, "invalid value %s for \"mode\"\n",
566 mode);
567 usb2->mode = USB_DR_MODE_UNKNOWN;
568 } else {
569 usb2->mode = err;
570 }
571 } else {
572 usb2->mode = USB_DR_MODE_HOST;
573 }
574
575 usb2->supply = devm_regulator_get(&port->dev, "vbus");
576 return PTR_ERR_OR_ZERO(usb2->supply);
577}
578
579static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
580 unsigned int index)
581{
582 struct tegra_xusb_usb2_port *usb2;
583 struct device_node *np;
584 int err = 0;
585
586
587
588
589
590 np = tegra_xusb_find_port_node(padctl, "usb2", index);
591 if (!np || !of_device_is_available(np))
592 goto out;
593
594 usb2 = devm_kzalloc(padctl->dev, sizeof(*usb2), GFP_KERNEL);
595 if (!usb2) {
596 err = -ENOMEM;
597 goto out;
598 }
599
600 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
601 if (err < 0)
602 goto out;
603
604 usb2->base.ops = padctl->soc->ports.usb2.ops;
605
606 usb2->base.lane = usb2->base.ops->map(&usb2->base);
607 if (IS_ERR(usb2->base.lane)) {
608 err = PTR_ERR(usb2->base.lane);
609 goto out;
610 }
611
612 err = tegra_xusb_usb2_port_parse_dt(usb2);
613 if (err < 0) {
614 tegra_xusb_port_unregister(&usb2->base);
615 goto out;
616 }
617
618 list_add_tail(&usb2->base.list, &padctl->ports);
619
620out:
621 of_node_put(np);
622 return err;
623}
624
625static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
626{
627 struct tegra_xusb_port *port = &ulpi->base;
628 struct device_node *np = port->dev.of_node;
629
630 ulpi->internal = of_property_read_bool(np, "nvidia,internal");
631
632 return 0;
633}
634
635static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
636 unsigned int index)
637{
638 struct tegra_xusb_ulpi_port *ulpi;
639 struct device_node *np;
640 int err = 0;
641
642 np = tegra_xusb_find_port_node(padctl, "ulpi", index);
643 if (!np || !of_device_is_available(np))
644 goto out;
645
646 ulpi = devm_kzalloc(padctl->dev, sizeof(*ulpi), GFP_KERNEL);
647 if (!ulpi) {
648 err = -ENOMEM;
649 goto out;
650 }
651
652 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
653 if (err < 0)
654 goto out;
655
656 ulpi->base.ops = padctl->soc->ports.ulpi.ops;
657
658 ulpi->base.lane = ulpi->base.ops->map(&ulpi->base);
659 if (IS_ERR(ulpi->base.lane)) {
660 err = PTR_ERR(ulpi->base.lane);
661 goto out;
662 }
663
664 err = tegra_xusb_ulpi_port_parse_dt(ulpi);
665 if (err < 0) {
666 tegra_xusb_port_unregister(&ulpi->base);
667 goto out;
668 }
669
670 list_add_tail(&ulpi->base.list, &padctl->ports);
671
672out:
673 of_node_put(np);
674 return err;
675}
676
677static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
678{
679
680 return 0;
681}
682
683static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
684 unsigned int index)
685{
686 struct tegra_xusb_hsic_port *hsic;
687 struct device_node *np;
688 int err = 0;
689
690 np = tegra_xusb_find_port_node(padctl, "hsic", index);
691 if (!np || !of_device_is_available(np))
692 goto out;
693
694 hsic = devm_kzalloc(padctl->dev, sizeof(*hsic), GFP_KERNEL);
695 if (!hsic) {
696 err = -ENOMEM;
697 goto out;
698 }
699
700 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
701 if (err < 0)
702 goto out;
703
704 hsic->base.ops = padctl->soc->ports.hsic.ops;
705
706 hsic->base.lane = hsic->base.ops->map(&hsic->base);
707 if (IS_ERR(hsic->base.lane)) {
708 err = PTR_ERR(hsic->base.lane);
709 goto out;
710 }
711
712 err = tegra_xusb_hsic_port_parse_dt(hsic);
713 if (err < 0) {
714 tegra_xusb_port_unregister(&hsic->base);
715 goto out;
716 }
717
718 list_add_tail(&hsic->base.list, &padctl->ports);
719
720out:
721 of_node_put(np);
722 return err;
723}
724
725static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
726{
727 struct tegra_xusb_port *port = &usb3->base;
728 struct device_node *np = port->dev.of_node;
729 u32 value;
730 int err;
731
732 err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
733 if (err < 0) {
734 dev_err(&port->dev, "failed to read port: %d\n", err);
735 return err;
736 }
737
738 usb3->port = value;
739
740 usb3->internal = of_property_read_bool(np, "nvidia,internal");
741
742 usb3->supply = devm_regulator_get(&port->dev, "vbus");
743 return PTR_ERR_OR_ZERO(usb3->supply);
744}
745
746static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
747 unsigned int index)
748{
749 struct tegra_xusb_usb3_port *usb3;
750 struct device_node *np;
751 int err = 0;
752
753
754
755
756
757
758 np = tegra_xusb_find_port_node(padctl, "usb3", index);
759 if (!np || !of_device_is_available(np))
760 goto out;
761
762 usb3 = devm_kzalloc(padctl->dev, sizeof(*usb3), GFP_KERNEL);
763 if (!usb3) {
764 err = -ENOMEM;
765 goto out;
766 }
767
768 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
769 if (err < 0)
770 goto out;
771
772 usb3->base.ops = padctl->soc->ports.usb3.ops;
773
774 usb3->base.lane = usb3->base.ops->map(&usb3->base);
775 if (IS_ERR(usb3->base.lane)) {
776 err = PTR_ERR(usb3->base.lane);
777 goto out;
778 }
779
780 err = tegra_xusb_usb3_port_parse_dt(usb3);
781 if (err < 0) {
782 tegra_xusb_port_unregister(&usb3->base);
783 goto out;
784 }
785
786 list_add_tail(&usb3->base.list, &padctl->ports);
787
788out:
789 of_node_put(np);
790 return err;
791}
792
793static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
794{
795 struct tegra_xusb_port *port, *tmp;
796
797 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
798 list_del(&port->list);
799 tegra_xusb_port_unregister(port);
800 }
801}
802
803static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
804{
805 struct tegra_xusb_port *port;
806 unsigned int i;
807 int err = 0;
808
809 mutex_lock(&padctl->lock);
810
811 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
812 err = tegra_xusb_add_usb2_port(padctl, i);
813 if (err < 0)
814 goto remove_ports;
815 }
816
817 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
818 err = tegra_xusb_add_ulpi_port(padctl, i);
819 if (err < 0)
820 goto remove_ports;
821 }
822
823 for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
824 err = tegra_xusb_add_hsic_port(padctl, i);
825 if (err < 0)
826 goto remove_ports;
827 }
828
829 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
830 err = tegra_xusb_add_usb3_port(padctl, i);
831 if (err < 0)
832 goto remove_ports;
833 }
834
835 list_for_each_entry(port, &padctl->ports, list) {
836 err = port->ops->enable(port);
837 if (err < 0)
838 dev_err(padctl->dev, "failed to enable port %s: %d\n",
839 dev_name(&port->dev), err);
840 }
841
842 goto unlock;
843
844remove_ports:
845 __tegra_xusb_remove_ports(padctl);
846unlock:
847 mutex_unlock(&padctl->lock);
848 return err;
849}
850
851static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
852{
853 mutex_lock(&padctl->lock);
854 __tegra_xusb_remove_ports(padctl);
855 mutex_unlock(&padctl->lock);
856}
857
858static int tegra_xusb_padctl_probe(struct platform_device *pdev)
859{
860 struct device_node *np = pdev->dev.of_node;
861 const struct tegra_xusb_padctl_soc *soc;
862 struct tegra_xusb_padctl *padctl;
863 const struct of_device_id *match;
864 struct resource *res;
865 unsigned int i;
866 int err;
867
868
869 np = of_get_child_by_name(np, "pads");
870 if (!np) {
871 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
872 return tegra_xusb_padctl_legacy_probe(pdev);
873 }
874
875 of_node_put(np);
876
877 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
878 soc = match->data;
879
880 padctl = soc->ops->probe(&pdev->dev, soc);
881 if (IS_ERR(padctl))
882 return PTR_ERR(padctl);
883
884 platform_set_drvdata(pdev, padctl);
885 INIT_LIST_HEAD(&padctl->ports);
886 INIT_LIST_HEAD(&padctl->lanes);
887 INIT_LIST_HEAD(&padctl->pads);
888 mutex_init(&padctl->lock);
889
890 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
891 padctl->regs = devm_ioremap_resource(&pdev->dev, res);
892 if (IS_ERR(padctl->regs)) {
893 err = PTR_ERR(padctl->regs);
894 goto remove;
895 }
896
897 padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
898 if (IS_ERR(padctl->rst)) {
899 err = PTR_ERR(padctl->rst);
900 goto remove;
901 }
902
903 padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
904 sizeof(*padctl->supplies), GFP_KERNEL);
905 if (!padctl->supplies) {
906 err = -ENOMEM;
907 goto remove;
908 }
909
910 for (i = 0; i < padctl->soc->num_supplies; i++)
911 padctl->supplies[i].supply = padctl->soc->supply_names[i];
912
913 err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
914 padctl->supplies);
915 if (err < 0) {
916 dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
917 goto remove;
918 }
919
920 err = reset_control_deassert(padctl->rst);
921 if (err < 0)
922 goto remove;
923
924 err = regulator_bulk_enable(padctl->soc->num_supplies,
925 padctl->supplies);
926 if (err < 0) {
927 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
928 goto reset;
929 }
930
931 err = tegra_xusb_setup_pads(padctl);
932 if (err < 0) {
933 dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
934 goto power_down;
935 }
936
937 err = tegra_xusb_setup_ports(padctl);
938 if (err) {
939 dev_err(&pdev->dev, "failed to setup XUSB ports: %d\n", err);
940 goto remove_pads;
941 }
942
943 return 0;
944
945remove_pads:
946 tegra_xusb_remove_pads(padctl);
947power_down:
948 regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
949reset:
950 reset_control_assert(padctl->rst);
951remove:
952 soc->ops->remove(padctl);
953 return err;
954}
955
956static int tegra_xusb_padctl_remove(struct platform_device *pdev)
957{
958 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
959 int err;
960
961 tegra_xusb_remove_ports(padctl);
962 tegra_xusb_remove_pads(padctl);
963
964 err = regulator_bulk_disable(padctl->soc->num_supplies,
965 padctl->supplies);
966 if (err < 0)
967 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
968
969 err = reset_control_assert(padctl->rst);
970 if (err < 0)
971 dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
972
973 padctl->soc->ops->remove(padctl);
974
975 return err;
976}
977
978static struct platform_driver tegra_xusb_padctl_driver = {
979 .driver = {
980 .name = "tegra-xusb-padctl",
981 .of_match_table = tegra_xusb_padctl_of_match,
982 },
983 .probe = tegra_xusb_padctl_probe,
984 .remove = tegra_xusb_padctl_remove,
985};
986module_platform_driver(tegra_xusb_padctl_driver);
987
988struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
989{
990 struct tegra_xusb_padctl *padctl;
991 struct platform_device *pdev;
992 struct device_node *np;
993
994 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
995 if (!np)
996 return ERR_PTR(-EINVAL);
997
998
999
1000
1001
1002
1003 pdev = of_find_device_by_node(np);
1004 if (!pdev) {
1005 of_node_put(np);
1006 return ERR_PTR(-ENODEV);
1007 }
1008
1009 of_node_put(np);
1010
1011 padctl = platform_get_drvdata(pdev);
1012 if (!padctl) {
1013 put_device(&pdev->dev);
1014 return ERR_PTR(-EPROBE_DEFER);
1015 }
1016
1017 return padctl;
1018}
1019EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
1020
1021void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
1022{
1023 if (padctl)
1024 put_device(padctl->dev);
1025}
1026EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
1027
1028int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
1029 unsigned int port)
1030{
1031 if (padctl->soc->ops->usb3_save_context)
1032 return padctl->soc->ops->usb3_save_context(padctl, port);
1033
1034 return -ENOSYS;
1035}
1036EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
1037
1038int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
1039 unsigned int port, bool idle)
1040{
1041 if (padctl->soc->ops->hsic_set_idle)
1042 return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
1043
1044 return -ENOSYS;
1045}
1046EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
1047
1048int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
1049 unsigned int port, bool enable)
1050{
1051 if (padctl->soc->ops->usb3_set_lfps_detect)
1052 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
1053 enable);
1054
1055 return -ENOSYS;
1056}
1057EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
1058
1059MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
1060MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
1061MODULE_LICENSE("GPL v2");
1062
