1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2014-2022, NVIDIA CORPORATION. All rights reserved.
6 #include <linux/delay.h>
8 #include <linux/mailbox_client.h>
9 #include <linux/module.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>
20 #include <soc/tegra/fuse.h>
24 static struct phy *tegra_xusb_pad_of_xlate(struct device *dev,
25 const struct of_phandle_args *args)
27 struct tegra_xusb_pad *pad = dev_get_drvdata(dev);
28 struct phy *phy = NULL;
31 if (args->args_count != 0)
32 return ERR_PTR(-EINVAL);
34 for (i = 0; i < pad->soc->num_lanes; i++) {
38 if (pad->lanes[i]->dev.of_node == args->np) {
45 phy = ERR_PTR(-ENODEV);
50 static const struct of_device_id tegra_xusb_padctl_of_match[] = {
51 #if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
53 .compatible = "nvidia,tegra124-xusb-padctl",
54 .data = &tegra124_xusb_padctl_soc,
57 #if defined(CONFIG_ARCH_TEGRA_210_SOC)
59 .compatible = "nvidia,tegra210-xusb-padctl",
60 .data = &tegra210_xusb_padctl_soc,
63 #if defined(CONFIG_ARCH_TEGRA_186_SOC)
65 .compatible = "nvidia,tegra186-xusb-padctl",
66 .data = &tegra186_xusb_padctl_soc,
69 #if defined(CONFIG_ARCH_TEGRA_194_SOC)
71 .compatible = "nvidia,tegra194-xusb-padctl",
72 .data = &tegra194_xusb_padctl_soc,
75 #if defined(CONFIG_ARCH_TEGRA_234_SOC)
77 .compatible = "nvidia,tegra234-xusb-padctl",
78 .data = &tegra234_xusb_padctl_soc,
83 MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
85 static struct device_node *
86 tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
88 struct device_node *pads, *np;
90 pads = of_get_child_by_name(padctl->dev->of_node, "pads");
94 np = of_get_child_by_name(pads, name);
100 static struct device_node *
101 tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
103 struct device_node *np, *lanes;
105 lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
109 np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
115 int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
116 struct device_node *np)
118 struct device *dev = &lane->pad->dev;
119 const char *function;
122 err = of_property_read_string(np, "nvidia,function", &function);
126 err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
128 dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
133 lane->function = err;
138 static void tegra_xusb_lane_destroy(struct phy *phy)
141 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
143 lane->pad->ops->remove(lane);
148 static void tegra_xusb_pad_release(struct device *dev)
150 struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
152 pad->soc->ops->remove(pad);
155 static const struct device_type tegra_xusb_pad_type = {
156 .release = tegra_xusb_pad_release,
159 int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
160 struct tegra_xusb_padctl *padctl,
161 struct device_node *np)
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;
172 err = dev_set_name(&pad->dev, "%s", pad->soc->name);
176 err = device_add(&pad->dev);
183 device_unregister(&pad->dev);
187 int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
188 const struct phy_ops *ops)
190 struct device_node *children;
195 children = of_get_child_by_name(pad->dev.of_node, "lanes");
199 pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
202 of_node_put(children);
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;
210 /* skip disabled lanes */
211 if (!np || !of_device_is_available(np)) {
216 pad->lanes[i] = phy_create(&pad->dev, np, ops);
217 if (IS_ERR(pad->lanes[i])) {
218 err = PTR_ERR(pad->lanes[i]);
223 lane = pad->ops->probe(pad, np, i);
225 phy_destroy(pad->lanes[i]);
230 list_add_tail(&lane->list, &pad->padctl->lanes);
231 phy_set_drvdata(pad->lanes[i], lane);
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);
245 tegra_xusb_lane_destroy(pad->lanes[i]);
247 of_node_put(children);
252 void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
254 unsigned int i = pad->soc->num_lanes;
256 of_phy_provider_unregister(pad->provider);
259 tegra_xusb_lane_destroy(pad->lanes[i]);
261 device_unregister(&pad->dev);
264 static struct tegra_xusb_pad *
265 tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
266 const struct tegra_xusb_pad_soc *soc)
268 struct tegra_xusb_pad *pad;
269 struct device_node *np;
272 np = tegra_xusb_find_pad_node(padctl, soc->name);
273 if (!np || !of_device_is_available(np))
276 pad = soc->ops->probe(padctl, soc, np);
279 dev_err(padctl->dev, "failed to create pad %s: %d\n",
284 /* XXX move this into ->probe() to avoid string comparison */
285 if (strcmp(soc->name, "pcie") == 0)
288 if (strcmp(soc->name, "sata") == 0)
291 if (strcmp(soc->name, "usb2") == 0)
294 if (strcmp(soc->name, "ulpi") == 0)
297 if (strcmp(soc->name, "hsic") == 0)
303 static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
305 struct tegra_xusb_pad *pad, *tmp;
307 list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
308 list_del(&pad->list);
309 tegra_xusb_pad_unregister(pad);
313 static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
315 mutex_lock(&padctl->lock);
316 __tegra_xusb_remove_pads(padctl);
317 mutex_unlock(&padctl->lock);
320 static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
322 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
323 const struct tegra_xusb_lane_soc *soc = lane->soc;
326 /* skip single function lanes */
327 if (soc->num_funcs < 2)
330 if (lane->pad->ops->iddq_enable)
331 lane->pad->ops->iddq_enable(lane);
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);
339 if (lane->pad->ops->iddq_disable)
340 lane->pad->ops->iddq_disable(lane);
343 static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
347 for (i = 0; i < pad->soc->num_lanes; i++) {
348 struct tegra_xusb_lane *lane;
351 lane = phy_get_drvdata(pad->lanes[i]);
352 tegra_xusb_lane_program(lane);
357 static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
359 struct tegra_xusb_pad *pad;
362 mutex_lock(&padctl->lock);
364 for (i = 0; i < padctl->soc->num_pads; i++) {
365 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
368 pad = tegra_xusb_pad_create(padctl, soc);
371 dev_err(padctl->dev, "failed to create pad %s: %d\n",
373 __tegra_xusb_remove_pads(padctl);
374 mutex_unlock(&padctl->lock);
381 list_add_tail(&pad->list, &padctl->pads);
384 list_for_each_entry(pad, &padctl->pads, list)
385 tegra_xusb_pad_program(pad);
387 mutex_unlock(&padctl->lock);
391 bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
392 const char *function)
394 const char *func = lane->soc->funcs[lane->function];
396 return strcmp(function, func) == 0;
399 struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
403 struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
406 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
408 return ERR_PTR(-ENOMEM);
410 list_for_each_entry(lane, &padctl->lanes, list) {
411 if (strcmp(lane->soc->name, name) == 0) {
421 struct tegra_xusb_lane *
422 tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
423 const struct tegra_xusb_lane_map *map,
424 const char *function)
426 struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
428 for (; map->type; map++) {
429 if (port->index != map->port)
432 lane = tegra_xusb_find_lane(port->padctl, map->type,
437 if (!tegra_xusb_lane_check(lane, function))
441 dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
442 map->type, map->index, match->soc->name);
450 static struct device_node *
451 tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
454 struct device_node *ports, *np;
457 ports = of_get_child_by_name(padctl->dev->of_node, "ports");
461 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
466 np = of_get_child_by_name(ports, name);
473 struct tegra_xusb_port *
474 tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
477 struct tegra_xusb_port *port;
478 struct device_node *np;
480 np = tegra_xusb_find_port_node(padctl, type, index);
484 list_for_each_entry(port, &padctl->ports, list) {
485 if (np == port->dev.of_node) {
496 struct tegra_xusb_usb2_port *
497 tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
499 struct tegra_xusb_port *port;
501 port = tegra_xusb_find_port(padctl, "usb2", index);
503 return to_usb2_port(port);
508 struct tegra_xusb_usb3_port *
509 tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
511 struct tegra_xusb_port *port;
513 port = tegra_xusb_find_port(padctl, "usb3", index);
515 return to_usb3_port(port);
520 static void tegra_xusb_port_release(struct device *dev)
522 struct tegra_xusb_port *port = to_tegra_xusb_port(dev);
524 if (port->ops->release)
525 port->ops->release(port);
528 static const struct device_type tegra_xusb_port_type = {
529 .release = tegra_xusb_port_release,
532 static int tegra_xusb_port_init(struct tegra_xusb_port *port,
533 struct tegra_xusb_padctl *padctl,
534 struct device_node *np,
540 INIT_LIST_HEAD(&port->list);
541 port->padctl = padctl;
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;
549 err = dev_set_name(&port->dev, "%s-%u", name, index);
553 err = device_add(&port->dev);
560 device_unregister(&port->dev);
564 static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
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;
574 if (port->ops->remove)
575 port->ops->remove(port);
577 device_unregister(&port->dev);
580 static 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",
587 static const char * const usb_roles[] = {
588 [USB_ROLE_NONE] = "none",
589 [USB_ROLE_HOST] = "host",
590 [USB_ROLE_DEVICE] = "device",
593 static enum usb_phy_events to_usb_phy_event(enum usb_role role)
596 case USB_ROLE_DEVICE:
597 return USB_EVENT_VBUS;
603 return USB_EVENT_NONE;
607 static void tegra_xusb_usb_phy_work(struct work_struct *work)
609 struct tegra_xusb_port *port = container_of(work,
610 struct tegra_xusb_port,
612 enum usb_role role = usb_role_switch_get_role(port->usb_role_sw);
614 usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role));
616 dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__,
619 atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy);
622 static int tegra_xusb_role_sw_set(struct usb_role_switch *sw,
625 struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw);
627 dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]);
629 schedule_work(&port->usb_phy_work);
634 static int tegra_xusb_set_peripheral(struct usb_otg *otg,
635 struct usb_gadget *gadget)
637 struct tegra_xusb_port *port = container_of(otg->usb_phy,
638 struct tegra_xusb_port,
642 schedule_work(&port->usb_phy_work);
647 static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host)
649 struct tegra_xusb_port *port = container_of(otg->usb_phy,
650 struct tegra_xusb_port,
654 schedule_work(&port->usb_phy_work);
660 static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port)
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,
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
676 port->dev.driver = devm_kzalloc(&port->dev,
677 sizeof(struct device_driver),
679 if (!port->dev.driver)
682 port->dev.driver->owner = THIS_MODULE;
684 port->usb_role_sw = usb_role_switch_register(&port->dev,
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",
693 INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work);
694 usb_role_switch_set_drvdata(port->usb_role_sw, port);
696 port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg),
698 if (!port->usb_phy.otg)
701 lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index);
704 * Assign phy dev to usb-phy dev. Host/device drivers can use phy
705 * reference to retrieve usb-phy details.
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;
713 err = usb_add_phy_dev(&port->usb_phy);
715 dev_err(&port->dev, "Failed to add USB PHY: %d\n", err);
719 /* populate connector entry */
720 of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev);
725 static void tegra_xusb_parse_usb_role_default_mode(struct tegra_xusb_port *port)
727 enum usb_role role = USB_ROLE_NONE;
728 enum usb_dr_mode mode = usb_get_role_switch_default_mode(&port->dev);
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;
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]);
741 static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
743 struct tegra_xusb_port *port = &usb2->base;
744 struct device_node *np = port->dev.of_node;
748 usb2->internal = of_property_read_bool(np, "nvidia,internal");
750 if (!of_property_read_string(np, "mode", &mode)) {
751 int err = match_string(modes, ARRAY_SIZE(modes), mode);
753 dev_err(&port->dev, "invalid value %s for \"mode\"\n",
755 usb2->mode = USB_DR_MODE_UNKNOWN;
760 usb2->mode = USB_DR_MODE_HOST;
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);
770 tegra_xusb_parse_usb_role_default_mode(port);
772 dev_err(&port->dev, "usb-role-switch not found for %s mode",
778 usb2->supply = regulator_get(&port->dev, "vbus");
779 return PTR_ERR_OR_ZERO(usb2->supply);
782 static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
785 struct tegra_xusb_usb2_port *usb2;
786 struct device_node *np;
790 * USB2 ports don't require additional properties, but if the port is
791 * marked as disabled there is no reason to register it.
793 np = tegra_xusb_find_port_node(padctl, "usb2", index);
794 if (!np || !of_device_is_available(np))
797 usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL);
803 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
807 usb2->base.ops = padctl->soc->ports.usb2.ops;
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);
816 err = tegra_xusb_usb2_port_parse_dt(usb2);
818 tegra_xusb_port_unregister(&usb2->base);
822 list_add_tail(&usb2->base.list, &padctl->ports);
829 void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port)
831 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
836 void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port)
838 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
840 regulator_put(usb2->supply);
843 static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
845 struct tegra_xusb_port *port = &ulpi->base;
846 struct device_node *np = port->dev.of_node;
848 ulpi->internal = of_property_read_bool(np, "nvidia,internal");
853 static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
856 struct tegra_xusb_ulpi_port *ulpi;
857 struct device_node *np;
860 np = tegra_xusb_find_port_node(padctl, "ulpi", index);
861 if (!np || !of_device_is_available(np))
864 ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
870 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
874 ulpi->base.ops = padctl->soc->ports.ulpi.ops;
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);
883 err = tegra_xusb_ulpi_port_parse_dt(ulpi);
885 tegra_xusb_port_unregister(&ulpi->base);
889 list_add_tail(&ulpi->base.list, &padctl->ports);
896 void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port)
898 struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port);
903 static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
909 static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
912 struct tegra_xusb_hsic_port *hsic;
913 struct device_node *np;
916 np = tegra_xusb_find_port_node(padctl, "hsic", index);
917 if (!np || !of_device_is_available(np))
920 hsic = kzalloc(sizeof(*hsic), GFP_KERNEL);
926 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
930 hsic->base.ops = padctl->soc->ports.hsic.ops;
932 hsic->base.lane = hsic->base.ops->map(&hsic->base);
933 if (IS_ERR(hsic->base.lane)) {
934 err = PTR_ERR(hsic->base.lane);
938 err = tegra_xusb_hsic_port_parse_dt(hsic);
940 tegra_xusb_port_unregister(&hsic->base);
944 list_add_tail(&hsic->base.list, &padctl->ports);
951 void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port)
953 struct tegra_xusb_hsic_port *hsic = to_hsic_port(port);
958 static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
960 struct tegra_xusb_port *port = &usb3->base;
961 struct device_node *np = port->dev.of_node;
962 enum usb_device_speed maximum_speed;
966 err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
968 dev_err(&port->dev, "failed to read port: %d\n", err);
974 usb3->internal = of_property_read_bool(np, "nvidia,internal");
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;
989 static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
992 struct tegra_xusb_usb3_port *usb3;
993 struct device_node *np;
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.
1001 np = tegra_xusb_find_port_node(padctl, "usb3", index);
1002 if (!np || !of_device_is_available(np))
1005 usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL);
1011 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
1015 usb3->base.ops = padctl->soc->ports.usb3.ops;
1017 usb3->base.lane = usb3->base.ops->map(&usb3->base);
1018 if (IS_ERR(usb3->base.lane)) {
1019 err = PTR_ERR(usb3->base.lane);
1023 err = tegra_xusb_usb3_port_parse_dt(usb3);
1025 tegra_xusb_port_unregister(&usb3->base);
1029 list_add_tail(&usb3->base.list, &padctl->ports);
1036 void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port)
1038 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port);
1043 static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1045 struct tegra_xusb_port *port, *tmp;
1047 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
1048 list_del(&port->list);
1049 tegra_xusb_port_unregister(port);
1053 static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl)
1055 struct device_node *np;
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))
1067 static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2)
1070 struct tegra_xusb_usb3_port *usb3;
1071 struct tegra_xusb_padctl *padctl = usb2->base.padctl;
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)
1082 static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2)
1086 /* Disable usb3_port_fake usage by default and assign if needed */
1087 usb2->usb3_port_fake = -1;
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);
1094 dev_err(&usb2->base.dev, "no unused USB3 ports available\n");
1098 dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake);
1099 usb2->usb3_port_fake = fake;
1105 static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
1107 struct tegra_xusb_port *port;
1108 struct tegra_xusb_usb2_port *usb2;
1112 mutex_lock(&padctl->lock);
1114 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1115 err = tegra_xusb_add_usb2_port(padctl, i);
1120 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
1121 err = tegra_xusb_add_ulpi_port(padctl, i);
1126 for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
1127 err = tegra_xusb_add_hsic_port(padctl, i);
1132 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1133 err = tegra_xusb_add_usb3_port(padctl, i);
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);
1144 err = tegra_xusb_update_usb3_fake_port(usb2);
1150 list_for_each_entry(port, &padctl->ports, list) {
1151 err = port->ops->enable(port);
1153 dev_err(padctl->dev, "failed to enable port %s: %d\n",
1154 dev_name(&port->dev), err);
1160 __tegra_xusb_remove_ports(padctl);
1162 mutex_unlock(&padctl->lock);
1166 static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1168 mutex_lock(&padctl->lock);
1169 __tegra_xusb_remove_ports(padctl);
1170 mutex_unlock(&padctl->lock);
1173 static int tegra_xusb_padctl_probe(struct platform_device *pdev)
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;
1181 /* for backwards compatibility with old device trees */
1182 np = of_get_child_by_name(np, "pads");
1184 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
1185 return tegra_xusb_padctl_legacy_probe(pdev);
1190 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
1193 padctl = soc->ops->probe(&pdev->dev, soc);
1195 return PTR_ERR(padctl);
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);
1203 padctl->regs = devm_platform_ioremap_resource(pdev, 0);
1204 if (IS_ERR(padctl->regs)) {
1205 err = PTR_ERR(padctl->regs);
1209 padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
1210 if (IS_ERR(padctl->rst)) {
1211 err = PTR_ERR(padctl->rst);
1215 padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
1216 sizeof(*padctl->supplies), GFP_KERNEL);
1217 if (!padctl->supplies) {
1222 regulator_bulk_set_supply_names(padctl->supplies,
1223 padctl->soc->supply_names,
1224 padctl->soc->num_supplies);
1226 err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
1229 dev_err_probe(&pdev->dev, err, "failed to get regulators\n");
1233 err = reset_control_deassert(padctl->rst);
1237 err = regulator_bulk_enable(padctl->soc->num_supplies,
1240 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
1244 err = tegra_xusb_setup_pads(padctl);
1246 dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
1250 err = tegra_xusb_setup_ports(padctl);
1252 const char *level = KERN_ERR;
1254 if (err == -EPROBE_DEFER)
1257 dev_printk(level, &pdev->dev,
1258 dev_fmt("failed to setup XUSB ports: %d\n"), err);
1265 tegra_xusb_remove_pads(padctl);
1267 regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
1269 reset_control_assert(padctl->rst);
1271 platform_set_drvdata(pdev, NULL);
1272 soc->ops->remove(padctl);
1276 static void tegra_xusb_padctl_remove(struct platform_device *pdev)
1278 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
1281 tegra_xusb_remove_ports(padctl);
1282 tegra_xusb_remove_pads(padctl);
1284 err = regulator_bulk_disable(padctl->soc->num_supplies,
1287 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
1289 err = reset_control_assert(padctl->rst);
1291 dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
1293 padctl->soc->ops->remove(padctl);
1296 static __maybe_unused int tegra_xusb_padctl_suspend_noirq(struct device *dev)
1298 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
1300 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq)
1301 return padctl->soc->ops->suspend_noirq(padctl);
1306 static __maybe_unused int tegra_xusb_padctl_resume_noirq(struct device *dev)
1308 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
1310 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq)
1311 return padctl->soc->ops->resume_noirq(padctl);
1316 static 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)
1321 static struct platform_driver tegra_xusb_padctl_driver = {
1323 .name = "tegra-xusb-padctl",
1324 .of_match_table = tegra_xusb_padctl_of_match,
1325 .pm = &tegra_xusb_padctl_pm_ops,
1327 .probe = tegra_xusb_padctl_probe,
1328 .remove_new = tegra_xusb_padctl_remove,
1330 module_platform_driver(tegra_xusb_padctl_driver);
1332 struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
1334 struct tegra_xusb_padctl *padctl;
1335 struct platform_device *pdev;
1336 struct device_node *np;
1338 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
1340 return ERR_PTR(-EINVAL);
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.
1347 pdev = of_find_device_by_node(np);
1350 return ERR_PTR(-ENODEV);
1355 padctl = platform_get_drvdata(pdev);
1357 put_device(&pdev->dev);
1358 return ERR_PTR(-EPROBE_DEFER);
1363 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
1365 void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
1368 put_device(padctl->dev);
1370 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
1372 int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
1375 if (padctl->soc->ops->usb3_save_context)
1376 return padctl->soc->ops->usb3_save_context(padctl, port);
1380 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
1382 int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
1383 unsigned int port, bool idle)
1385 if (padctl->soc->ops->hsic_set_idle)
1386 return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
1390 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
1392 int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy,
1393 enum usb_device_speed speed)
1395 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1397 if (lane->pad->ops->enable_phy_sleepwalk)
1398 return lane->pad->ops->enable_phy_sleepwalk(lane, speed);
1402 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk);
1404 int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy)
1406 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1408 if (lane->pad->ops->disable_phy_sleepwalk)
1409 return lane->pad->ops->disable_phy_sleepwalk(lane);
1413 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk);
1415 int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
1417 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1419 if (lane->pad->ops->enable_phy_wake)
1420 return lane->pad->ops->enable_phy_wake(lane);
1424 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake);
1426 int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
1428 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1430 if (lane->pad->ops->disable_phy_wake)
1431 return lane->pad->ops->disable_phy_wake(lane);
1435 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake);
1437 bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy)
1439 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1441 if (lane->pad->ops->remote_wake_detected)
1442 return lane->pad->ops->remote_wake_detected(lane);
1446 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected);
1448 int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
1449 unsigned int port, bool enable)
1451 if (padctl->soc->ops->usb3_set_lfps_detect)
1452 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
1457 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
1459 int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
1462 if (padctl->soc->ops->vbus_override)
1463 return padctl->soc->ops->vbus_override(padctl, val);
1467 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override);
1469 int tegra_phy_xusb_utmi_port_reset(struct phy *phy)
1471 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1472 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
1474 if (padctl->soc->ops->utmi_port_reset)
1475 return padctl->soc->ops->utmi_port_reset(phy);
1479 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset);
1481 void tegra_phy_xusb_utmi_pad_power_on(struct phy *phy)
1483 struct tegra_xusb_lane *lane;
1484 struct tegra_xusb_padctl *padctl;
1489 lane = phy_get_drvdata(phy);
1490 padctl = lane->pad->padctl;
1492 if (padctl->soc->ops->utmi_pad_power_on)
1493 padctl->soc->ops->utmi_pad_power_on(phy);
1495 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_on);
1497 void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy)
1499 struct tegra_xusb_lane *lane;
1500 struct tegra_xusb_padctl *padctl;
1505 lane = phy_get_drvdata(phy);
1506 padctl = lane->pad->padctl;
1508 if (padctl->soc->ops->utmi_pad_power_down)
1509 padctl->soc->ops->utmi_pad_power_down(phy);
1511 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_down);
1513 int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
1516 struct tegra_xusb_usb2_port *usb2;
1517 struct tegra_xusb_usb3_port *usb3;
1520 usb2 = tegra_xusb_find_usb2_port(padctl, port);
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;
1532 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
1534 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
1535 MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
1536 MODULE_LICENSE("GPL v2");