1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2014-2016, 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_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>
20 #include <soc/tegra/fuse.h>
24 static struct phy *tegra_xusb_pad_of_xlate(struct device *dev,
25 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,
77 MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
79 static struct device_node *
80 tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
82 struct device_node *pads, *np;
84 pads = of_get_child_by_name(padctl->dev->of_node, "pads");
88 np = of_get_child_by_name(pads, name);
94 static struct device_node *
95 tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
97 struct device_node *np, *lanes;
99 lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
103 np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
109 int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
110 struct device_node *np)
112 struct device *dev = &lane->pad->dev;
113 const char *function;
116 err = of_property_read_string(np, "nvidia,function", &function);
120 err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
122 dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
127 lane->function = err;
132 static void tegra_xusb_lane_destroy(struct phy *phy)
135 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
137 lane->pad->ops->remove(lane);
142 static void tegra_xusb_pad_release(struct device *dev)
144 struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
146 pad->soc->ops->remove(pad);
149 static struct device_type tegra_xusb_pad_type = {
150 .release = tegra_xusb_pad_release,
153 int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
154 struct tegra_xusb_padctl *padctl,
155 struct device_node *np)
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;
166 err = dev_set_name(&pad->dev, "%s", pad->soc->name);
170 err = device_add(&pad->dev);
177 device_unregister(&pad->dev);
181 int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
182 const struct phy_ops *ops)
184 struct device_node *children;
189 children = of_get_child_by_name(pad->dev.of_node, "lanes");
193 pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
196 of_node_put(children);
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;
204 /* skip disabled lanes */
205 if (!np || !of_device_is_available(np)) {
210 pad->lanes[i] = phy_create(&pad->dev, np, ops);
211 if (IS_ERR(pad->lanes[i])) {
212 err = PTR_ERR(pad->lanes[i]);
217 lane = pad->ops->probe(pad, np, i);
219 phy_destroy(pad->lanes[i]);
224 list_add_tail(&lane->list, &pad->padctl->lanes);
225 phy_set_drvdata(pad->lanes[i], lane);
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);
239 tegra_xusb_lane_destroy(pad->lanes[i]);
241 of_node_put(children);
246 void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
248 unsigned int i = pad->soc->num_lanes;
250 of_phy_provider_unregister(pad->provider);
253 tegra_xusb_lane_destroy(pad->lanes[i]);
255 device_unregister(&pad->dev);
258 static struct tegra_xusb_pad *
259 tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
260 const struct tegra_xusb_pad_soc *soc)
262 struct tegra_xusb_pad *pad;
263 struct device_node *np;
266 np = tegra_xusb_find_pad_node(padctl, soc->name);
267 if (!np || !of_device_is_available(np))
270 pad = soc->ops->probe(padctl, soc, np);
273 dev_err(padctl->dev, "failed to create pad %s: %d\n",
278 /* XXX move this into ->probe() to avoid string comparison */
279 if (strcmp(soc->name, "pcie") == 0)
282 if (strcmp(soc->name, "sata") == 0)
285 if (strcmp(soc->name, "usb2") == 0)
288 if (strcmp(soc->name, "ulpi") == 0)
291 if (strcmp(soc->name, "hsic") == 0)
297 static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
299 struct tegra_xusb_pad *pad, *tmp;
301 list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
302 list_del(&pad->list);
303 tegra_xusb_pad_unregister(pad);
307 static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
309 mutex_lock(&padctl->lock);
310 __tegra_xusb_remove_pads(padctl);
311 mutex_unlock(&padctl->lock);
314 static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
316 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
317 const struct tegra_xusb_lane_soc *soc = lane->soc;
320 /* skip single function lanes */
321 if (soc->num_funcs < 2)
324 /* choose function */
325 value = padctl_readl(padctl, soc->offset);
326 value &= ~(soc->mask << soc->shift);
327 value |= lane->function << soc->shift;
328 padctl_writel(padctl, value, soc->offset);
331 static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
335 for (i = 0; i < pad->soc->num_lanes; i++) {
336 struct tegra_xusb_lane *lane;
339 lane = phy_get_drvdata(pad->lanes[i]);
340 tegra_xusb_lane_program(lane);
345 static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
347 struct tegra_xusb_pad *pad;
350 mutex_lock(&padctl->lock);
352 for (i = 0; i < padctl->soc->num_pads; i++) {
353 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
356 pad = tegra_xusb_pad_create(padctl, soc);
359 dev_err(padctl->dev, "failed to create pad %s: %d\n",
361 __tegra_xusb_remove_pads(padctl);
362 mutex_unlock(&padctl->lock);
369 list_add_tail(&pad->list, &padctl->pads);
372 list_for_each_entry(pad, &padctl->pads, list)
373 tegra_xusb_pad_program(pad);
375 mutex_unlock(&padctl->lock);
379 static bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
380 const char *function)
382 const char *func = lane->soc->funcs[lane->function];
384 return strcmp(function, func) == 0;
387 struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
391 struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
394 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
396 return ERR_PTR(-ENOMEM);
398 list_for_each_entry(lane, &padctl->lanes, list) {
399 if (strcmp(lane->soc->name, name) == 0) {
409 struct tegra_xusb_lane *
410 tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
411 const struct tegra_xusb_lane_map *map,
412 const char *function)
414 struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
416 for (; map->type; map++) {
417 if (port->index != map->port)
420 lane = tegra_xusb_find_lane(port->padctl, map->type,
425 if (!tegra_xusb_lane_check(lane, function))
429 dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
430 map->type, map->index, match->soc->name);
438 static struct device_node *
439 tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
442 struct device_node *ports, *np;
445 ports = of_get_child_by_name(padctl->dev->of_node, "ports");
449 name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
452 return ERR_PTR(-ENOMEM);
454 np = of_get_child_by_name(ports, name);
461 struct tegra_xusb_port *
462 tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
465 struct tegra_xusb_port *port;
466 struct device_node *np;
468 np = tegra_xusb_find_port_node(padctl, type, index);
472 list_for_each_entry(port, &padctl->ports, list) {
473 if (np == port->dev.of_node) {
484 struct tegra_xusb_usb2_port *
485 tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
487 struct tegra_xusb_port *port;
489 port = tegra_xusb_find_port(padctl, "usb2", index);
491 return to_usb2_port(port);
496 struct tegra_xusb_usb3_port *
497 tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
499 struct tegra_xusb_port *port;
501 port = tegra_xusb_find_port(padctl, "usb3", index);
503 return to_usb3_port(port);
508 static void tegra_xusb_port_release(struct device *dev)
510 struct tegra_xusb_port *port = to_tegra_xusb_port(dev);
512 if (port->ops->release)
513 port->ops->release(port);
516 static struct device_type tegra_xusb_port_type = {
517 .release = tegra_xusb_port_release,
520 static int tegra_xusb_port_init(struct tegra_xusb_port *port,
521 struct tegra_xusb_padctl *padctl,
522 struct device_node *np,
528 INIT_LIST_HEAD(&port->list);
529 port->padctl = padctl;
532 device_initialize(&port->dev);
533 port->dev.type = &tegra_xusb_port_type;
534 port->dev.of_node = of_node_get(np);
535 port->dev.parent = padctl->dev;
537 err = dev_set_name(&port->dev, "%s-%u", name, index);
541 err = device_add(&port->dev);
548 device_unregister(&port->dev);
552 static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
554 if (!IS_ERR_OR_NULL(port->usb_role_sw)) {
555 of_platform_depopulate(&port->dev);
556 usb_role_switch_unregister(port->usb_role_sw);
557 cancel_work_sync(&port->usb_phy_work);
558 usb_remove_phy(&port->usb_phy);
559 port->usb_phy.dev->driver = NULL;
562 if (port->ops->remove)
563 port->ops->remove(port);
565 device_unregister(&port->dev);
568 static const char *const modes[] = {
569 [USB_DR_MODE_UNKNOWN] = "",
570 [USB_DR_MODE_HOST] = "host",
571 [USB_DR_MODE_PERIPHERAL] = "peripheral",
572 [USB_DR_MODE_OTG] = "otg",
575 static const char * const usb_roles[] = {
576 [USB_ROLE_NONE] = "none",
577 [USB_ROLE_HOST] = "host",
578 [USB_ROLE_DEVICE] = "device",
581 static enum usb_phy_events to_usb_phy_event(enum usb_role role)
584 case USB_ROLE_DEVICE:
585 return USB_EVENT_VBUS;
591 return USB_EVENT_NONE;
595 static void tegra_xusb_usb_phy_work(struct work_struct *work)
597 struct tegra_xusb_port *port = container_of(work,
598 struct tegra_xusb_port,
600 enum usb_role role = usb_role_switch_get_role(port->usb_role_sw);
602 usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role));
604 dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__,
607 atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy);
610 static int tegra_xusb_role_sw_set(struct usb_role_switch *sw,
613 struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw);
615 dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]);
617 schedule_work(&port->usb_phy_work);
622 static int tegra_xusb_set_peripheral(struct usb_otg *otg,
623 struct usb_gadget *gadget)
625 struct tegra_xusb_port *port = container_of(otg->usb_phy,
626 struct tegra_xusb_port,
630 schedule_work(&port->usb_phy_work);
635 static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host)
637 struct tegra_xusb_port *port = container_of(otg->usb_phy,
638 struct tegra_xusb_port,
642 schedule_work(&port->usb_phy_work);
648 static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port)
650 struct tegra_xusb_lane *lane;
651 struct usb_role_switch_desc role_sx_desc = {
652 .fwnode = dev_fwnode(&port->dev),
653 .set = tegra_xusb_role_sw_set,
658 * USB role switch driver needs parent driver owner info. This is a
659 * suboptimal solution. TODO: Need to revisit this in a follow-up patch
660 * where an optimal solution is possible with changes to USB role
663 port->dev.driver = devm_kzalloc(&port->dev,
664 sizeof(struct device_driver),
666 if (!port->dev.driver)
669 port->dev.driver->owner = THIS_MODULE;
671 port->usb_role_sw = usb_role_switch_register(&port->dev,
673 if (IS_ERR(port->usb_role_sw)) {
674 err = PTR_ERR(port->usb_role_sw);
675 dev_err(&port->dev, "failed to register USB role switch: %d",
680 INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work);
681 usb_role_switch_set_drvdata(port->usb_role_sw, port);
683 port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg),
685 if (!port->usb_phy.otg)
688 lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index);
691 * Assign phy dev to usb-phy dev. Host/device drivers can use phy
692 * reference to retrieve usb-phy details.
694 port->usb_phy.dev = &lane->pad->lanes[port->index]->dev;
695 port->usb_phy.dev->driver = port->dev.driver;
696 port->usb_phy.otg->usb_phy = &port->usb_phy;
697 port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral;
698 port->usb_phy.otg->set_host = tegra_xusb_set_host;
700 err = usb_add_phy_dev(&port->usb_phy);
702 dev_err(&port->dev, "Failed to add USB PHY: %d\n", err);
706 /* populate connector entry */
707 of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev);
712 static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
714 struct tegra_xusb_port *port = &usb2->base;
715 struct device_node *np = port->dev.of_node;
719 usb2->internal = of_property_read_bool(np, "nvidia,internal");
721 if (!of_property_read_string(np, "mode", &mode)) {
722 int err = match_string(modes, ARRAY_SIZE(modes), mode);
724 dev_err(&port->dev, "invalid value %s for \"mode\"\n",
726 usb2->mode = USB_DR_MODE_UNKNOWN;
731 usb2->mode = USB_DR_MODE_HOST;
734 /* usb-role-switch property is mandatory for OTG/Peripheral modes */
735 if (usb2->mode == USB_DR_MODE_PERIPHERAL ||
736 usb2->mode == USB_DR_MODE_OTG) {
737 if (of_property_read_bool(np, "usb-role-switch")) {
738 err = tegra_xusb_setup_usb_role_switch(port);
742 dev_err(&port->dev, "usb-role-switch not found for %s mode",
748 usb2->supply = regulator_get(&port->dev, "vbus");
749 return PTR_ERR_OR_ZERO(usb2->supply);
752 static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
755 struct tegra_xusb_usb2_port *usb2;
756 struct device_node *np;
760 * USB2 ports don't require additional properties, but if the port is
761 * marked as disabled there is no reason to register it.
763 np = tegra_xusb_find_port_node(padctl, "usb2", index);
764 if (!np || !of_device_is_available(np))
767 usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL);
773 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
777 usb2->base.ops = padctl->soc->ports.usb2.ops;
779 usb2->base.lane = usb2->base.ops->map(&usb2->base);
780 if (IS_ERR(usb2->base.lane)) {
781 err = PTR_ERR(usb2->base.lane);
782 tegra_xusb_port_unregister(&usb2->base);
786 err = tegra_xusb_usb2_port_parse_dt(usb2);
788 tegra_xusb_port_unregister(&usb2->base);
792 list_add_tail(&usb2->base.list, &padctl->ports);
799 void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port)
801 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
806 void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port)
808 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
810 regulator_put(usb2->supply);
813 static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
815 struct tegra_xusb_port *port = &ulpi->base;
816 struct device_node *np = port->dev.of_node;
818 ulpi->internal = of_property_read_bool(np, "nvidia,internal");
823 static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
826 struct tegra_xusb_ulpi_port *ulpi;
827 struct device_node *np;
830 np = tegra_xusb_find_port_node(padctl, "ulpi", index);
831 if (!np || !of_device_is_available(np))
834 ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
840 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
844 ulpi->base.ops = padctl->soc->ports.ulpi.ops;
846 ulpi->base.lane = ulpi->base.ops->map(&ulpi->base);
847 if (IS_ERR(ulpi->base.lane)) {
848 err = PTR_ERR(ulpi->base.lane);
849 tegra_xusb_port_unregister(&ulpi->base);
853 err = tegra_xusb_ulpi_port_parse_dt(ulpi);
855 tegra_xusb_port_unregister(&ulpi->base);
859 list_add_tail(&ulpi->base.list, &padctl->ports);
866 void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port)
868 struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port);
873 static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
879 static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
882 struct tegra_xusb_hsic_port *hsic;
883 struct device_node *np;
886 np = tegra_xusb_find_port_node(padctl, "hsic", index);
887 if (!np || !of_device_is_available(np))
890 hsic = kzalloc(sizeof(*hsic), GFP_KERNEL);
896 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
900 hsic->base.ops = padctl->soc->ports.hsic.ops;
902 hsic->base.lane = hsic->base.ops->map(&hsic->base);
903 if (IS_ERR(hsic->base.lane)) {
904 err = PTR_ERR(hsic->base.lane);
908 err = tegra_xusb_hsic_port_parse_dt(hsic);
910 tegra_xusb_port_unregister(&hsic->base);
914 list_add_tail(&hsic->base.list, &padctl->ports);
921 void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port)
923 struct tegra_xusb_hsic_port *hsic = to_hsic_port(port);
928 static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
930 struct tegra_xusb_port *port = &usb3->base;
931 struct device_node *np = port->dev.of_node;
932 enum usb_device_speed maximum_speed;
936 err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
938 dev_err(&port->dev, "failed to read port: %d\n", err);
944 usb3->internal = of_property_read_bool(np, "nvidia,internal");
946 if (device_property_present(&port->dev, "maximum-speed")) {
947 maximum_speed = usb_get_maximum_speed(&port->dev);
948 if (maximum_speed == USB_SPEED_SUPER)
949 usb3->disable_gen2 = true;
950 else if (maximum_speed == USB_SPEED_SUPER_PLUS)
951 usb3->disable_gen2 = false;
956 usb3->supply = regulator_get(&port->dev, "vbus");
957 return PTR_ERR_OR_ZERO(usb3->supply);
960 static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
963 struct tegra_xusb_usb3_port *usb3;
964 struct device_node *np;
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.
972 np = tegra_xusb_find_port_node(padctl, "usb3", index);
973 if (!np || !of_device_is_available(np))
976 usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL);
982 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
986 usb3->base.ops = padctl->soc->ports.usb3.ops;
988 usb3->base.lane = usb3->base.ops->map(&usb3->base);
989 if (IS_ERR(usb3->base.lane)) {
990 err = PTR_ERR(usb3->base.lane);
994 err = tegra_xusb_usb3_port_parse_dt(usb3);
996 tegra_xusb_port_unregister(&usb3->base);
1000 list_add_tail(&usb3->base.list, &padctl->ports);
1007 void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port)
1009 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port);
1014 void tegra_xusb_usb3_port_remove(struct tegra_xusb_port *port)
1016 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port);
1018 regulator_put(usb3->supply);
1021 static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1023 struct tegra_xusb_port *port, *tmp;
1025 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
1026 list_del(&port->list);
1027 tegra_xusb_port_unregister(port);
1031 static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl)
1033 struct device_node *np;
1036 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1037 np = tegra_xusb_find_port_node(padctl, "usb3", i);
1038 if (!np || !of_device_is_available(np))
1045 static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2)
1048 struct tegra_xusb_usb3_port *usb3;
1049 struct tegra_xusb_padctl *padctl = usb2->base.padctl;
1051 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1052 usb3 = tegra_xusb_find_usb3_port(padctl, i);
1053 if (usb3 && usb3->port == usb2->base.index)
1060 static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2)
1064 /* Disable usb3_port_fake usage by default and assign if needed */
1065 usb2->usb3_port_fake = -1;
1067 if ((usb2->mode == USB_DR_MODE_OTG ||
1068 usb2->mode == USB_DR_MODE_PERIPHERAL) &&
1069 !tegra_xusb_port_is_companion(usb2)) {
1070 fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl);
1072 dev_err(&usb2->base.dev, "no unused USB3 ports available\n");
1076 dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake);
1077 usb2->usb3_port_fake = fake;
1083 static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
1085 struct tegra_xusb_port *port;
1086 struct tegra_xusb_usb2_port *usb2;
1090 mutex_lock(&padctl->lock);
1092 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1093 err = tegra_xusb_add_usb2_port(padctl, i);
1098 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
1099 err = tegra_xusb_add_ulpi_port(padctl, i);
1104 for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
1105 err = tegra_xusb_add_hsic_port(padctl, i);
1110 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1111 err = tegra_xusb_add_usb3_port(padctl, i);
1116 if (padctl->soc->need_fake_usb3_port) {
1117 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1118 usb2 = tegra_xusb_find_usb2_port(padctl, i);
1122 err = tegra_xusb_update_usb3_fake_port(usb2);
1128 list_for_each_entry(port, &padctl->ports, list) {
1129 err = port->ops->enable(port);
1131 dev_err(padctl->dev, "failed to enable port %s: %d\n",
1132 dev_name(&port->dev), err);
1138 __tegra_xusb_remove_ports(padctl);
1140 mutex_unlock(&padctl->lock);
1144 static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1146 mutex_lock(&padctl->lock);
1147 __tegra_xusb_remove_ports(padctl);
1148 mutex_unlock(&padctl->lock);
1151 static int tegra_xusb_padctl_probe(struct platform_device *pdev)
1153 struct device_node *np = pdev->dev.of_node;
1154 const struct tegra_xusb_padctl_soc *soc;
1155 struct tegra_xusb_padctl *padctl;
1156 const struct of_device_id *match;
1157 struct resource *res;
1160 /* for backwards compatibility with old device trees */
1161 np = of_get_child_by_name(np, "pads");
1163 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
1164 return tegra_xusb_padctl_legacy_probe(pdev);
1169 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
1172 padctl = soc->ops->probe(&pdev->dev, soc);
1174 return PTR_ERR(padctl);
1176 platform_set_drvdata(pdev, padctl);
1177 INIT_LIST_HEAD(&padctl->ports);
1178 INIT_LIST_HEAD(&padctl->lanes);
1179 INIT_LIST_HEAD(&padctl->pads);
1180 mutex_init(&padctl->lock);
1182 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1183 padctl->regs = devm_ioremap_resource(&pdev->dev, res);
1184 if (IS_ERR(padctl->regs)) {
1185 err = PTR_ERR(padctl->regs);
1189 padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
1190 if (IS_ERR(padctl->rst)) {
1191 err = PTR_ERR(padctl->rst);
1195 padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
1196 sizeof(*padctl->supplies), GFP_KERNEL);
1197 if (!padctl->supplies) {
1202 regulator_bulk_set_supply_names(padctl->supplies,
1203 padctl->soc->supply_names,
1204 padctl->soc->num_supplies);
1206 err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
1209 dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
1213 err = reset_control_deassert(padctl->rst);
1217 err = regulator_bulk_enable(padctl->soc->num_supplies,
1220 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
1224 err = tegra_xusb_setup_pads(padctl);
1226 dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
1230 err = tegra_xusb_setup_ports(padctl);
1232 const char *level = KERN_ERR;
1234 if (err == -EPROBE_DEFER)
1237 dev_printk(level, &pdev->dev,
1238 dev_fmt("failed to setup XUSB ports: %d\n"), err);
1245 tegra_xusb_remove_pads(padctl);
1247 regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
1249 reset_control_assert(padctl->rst);
1251 platform_set_drvdata(pdev, NULL);
1252 soc->ops->remove(padctl);
1256 static int tegra_xusb_padctl_remove(struct platform_device *pdev)
1258 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
1261 tegra_xusb_remove_ports(padctl);
1262 tegra_xusb_remove_pads(padctl);
1264 err = regulator_bulk_disable(padctl->soc->num_supplies,
1267 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
1269 err = reset_control_assert(padctl->rst);
1271 dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
1273 padctl->soc->ops->remove(padctl);
1278 static struct platform_driver tegra_xusb_padctl_driver = {
1280 .name = "tegra-xusb-padctl",
1281 .of_match_table = tegra_xusb_padctl_of_match,
1283 .probe = tegra_xusb_padctl_probe,
1284 .remove = tegra_xusb_padctl_remove,
1286 module_platform_driver(tegra_xusb_padctl_driver);
1288 struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
1290 struct tegra_xusb_padctl *padctl;
1291 struct platform_device *pdev;
1292 struct device_node *np;
1294 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
1296 return ERR_PTR(-EINVAL);
1299 * This is slightly ugly. A better implementation would be to keep a
1300 * registry of pad controllers, but since there will almost certainly
1301 * only ever be one per SoC that would be a little overkill.
1303 pdev = of_find_device_by_node(np);
1306 return ERR_PTR(-ENODEV);
1311 padctl = platform_get_drvdata(pdev);
1313 put_device(&pdev->dev);
1314 return ERR_PTR(-EPROBE_DEFER);
1319 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
1321 void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
1324 put_device(padctl->dev);
1326 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
1328 int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
1331 if (padctl->soc->ops->usb3_save_context)
1332 return padctl->soc->ops->usb3_save_context(padctl, port);
1336 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
1338 int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
1339 unsigned int port, bool idle)
1341 if (padctl->soc->ops->hsic_set_idle)
1342 return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
1346 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
1348 int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
1349 unsigned int port, bool enable)
1351 if (padctl->soc->ops->usb3_set_lfps_detect)
1352 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
1357 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
1359 int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
1362 if (padctl->soc->ops->vbus_override)
1363 return padctl->soc->ops->vbus_override(padctl, val);
1367 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override);
1369 int tegra_phy_xusb_utmi_port_reset(struct phy *phy)
1371 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1372 struct tegra_xusb_padctl *padctl = lane->pad->padctl;
1374 if (padctl->soc->ops->utmi_port_reset)
1375 return padctl->soc->ops->utmi_port_reset(phy);
1379 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset);
1381 int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
1384 struct tegra_xusb_usb2_port *usb2;
1385 struct tegra_xusb_usb3_port *usb3;
1388 usb2 = tegra_xusb_find_usb2_port(padctl, port);
1392 for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1393 usb3 = tegra_xusb_find_usb3_port(padctl, i);
1394 if (usb3 && usb3->port == usb2->base.index)
1395 return usb3->base.index;
1400 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
1402 int tegra_xusb_padctl_get_port_number(struct phy *phy)
1404 struct tegra_xusb_lane *lane;
1409 lane = phy_get_drvdata(phy);
1413 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_port_number);
1415 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
1416 MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
1417 MODULE_LICENSE("GPL v2");