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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /drivers/phy/tegra/xusb.c
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/phy/tegra/xusb.c')
-rw-r--r--drivers/phy/tegra/xusb.c1404
1 files changed, 1404 insertions, 0 deletions
diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
new file mode 100644
index 000000000..8f11b293c
--- /dev/null
+++ b/drivers/phy/tegra/xusb.c
@@ -0,0 +1,1404 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/mailbox_client.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/phy/tegra/xusb.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+#include <soc/tegra/fuse.h>
+
+#include "xusb.h"
+
+static struct phy *tegra_xusb_pad_of_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct tegra_xusb_pad *pad = dev_get_drvdata(dev);
+ struct phy *phy = NULL;
+ unsigned int i;
+
+ if (args->args_count != 0)
+ return ERR_PTR(-EINVAL);
+
+ for (i = 0; i < pad->soc->num_lanes; i++) {
+ if (!pad->lanes[i])
+ continue;
+
+ if (pad->lanes[i]->dev.of_node == args->np) {
+ phy = pad->lanes[i];
+ break;
+ }
+ }
+
+ if (phy == NULL)
+ phy = ERR_PTR(-ENODEV);
+
+ return phy;
+}
+
+static const struct of_device_id tegra_xusb_padctl_of_match[] = {
+#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
+ {
+ .compatible = "nvidia,tegra124-xusb-padctl",
+ .data = &tegra124_xusb_padctl_soc,
+ },
+#endif
+#if defined(CONFIG_ARCH_TEGRA_210_SOC)
+ {
+ .compatible = "nvidia,tegra210-xusb-padctl",
+ .data = &tegra210_xusb_padctl_soc,
+ },
+#endif
+#if defined(CONFIG_ARCH_TEGRA_186_SOC)
+ {
+ .compatible = "nvidia,tegra186-xusb-padctl",
+ .data = &tegra186_xusb_padctl_soc,
+ },
+#endif
+#if defined(CONFIG_ARCH_TEGRA_194_SOC)
+ {
+ .compatible = "nvidia,tegra194-xusb-padctl",
+ .data = &tegra194_xusb_padctl_soc,
+ },
+#endif
+ { }
+};
+MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
+
+static struct device_node *
+tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
+{
+ struct device_node *pads, *np;
+
+ pads = of_get_child_by_name(padctl->dev->of_node, "pads");
+ if (!pads)
+ return NULL;
+
+ np = of_get_child_by_name(pads, name);
+ of_node_put(pads);
+
+ return np;
+}
+
+static struct device_node *
+tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
+{
+ struct device_node *np, *lanes;
+
+ lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
+ if (!lanes)
+ return NULL;
+
+ np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
+ of_node_put(lanes);
+
+ return np;
+}
+
+int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
+ struct device_node *np)
+{
+ struct device *dev = &lane->pad->dev;
+ const char *function;
+ int err;
+
+ err = of_property_read_string(np, "nvidia,function", &function);
+ if (err < 0)
+ return err;
+
+ err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
+ if (err < 0) {
+ dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
+ function, np);
+ return err;
+ }
+
+ lane->function = err;
+
+ return 0;
+}
+
+static void tegra_xusb_lane_destroy(struct phy *phy)
+{
+ if (phy) {
+ struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
+
+ lane->pad->ops->remove(lane);
+ phy_destroy(phy);
+ }
+}
+
+static void tegra_xusb_pad_release(struct device *dev)
+{
+ struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
+
+ pad->soc->ops->remove(pad);
+}
+
+static struct device_type tegra_xusb_pad_type = {
+ .release = tegra_xusb_pad_release,
+};
+
+int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
+ struct tegra_xusb_padctl *padctl,
+ struct device_node *np)
+{
+ int err;
+
+ device_initialize(&pad->dev);
+ INIT_LIST_HEAD(&pad->list);
+ pad->dev.parent = padctl->dev;
+ pad->dev.type = &tegra_xusb_pad_type;
+ pad->dev.of_node = np;
+ pad->padctl = padctl;
+
+ err = dev_set_name(&pad->dev, "%s", pad->soc->name);
+ if (err < 0)
+ goto unregister;
+
+ err = device_add(&pad->dev);
+ if (err < 0)
+ goto unregister;
+
+ return 0;
+
+unregister:
+ device_unregister(&pad->dev);
+ return err;
+}
+
+int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
+ const struct phy_ops *ops)
+{
+ struct device_node *children;
+ struct phy *lane;
+ unsigned int i;
+ int err;
+
+ children = of_get_child_by_name(pad->dev.of_node, "lanes");
+ if (!children)
+ return -ENODEV;
+
+ pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
+ GFP_KERNEL);
+ if (!pad->lanes) {
+ of_node_put(children);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < pad->soc->num_lanes; i++) {
+ struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i);
+ struct tegra_xusb_lane *lane;
+
+ /* skip disabled lanes */
+ if (!np || !of_device_is_available(np)) {
+ of_node_put(np);
+ continue;
+ }
+
+ pad->lanes[i] = phy_create(&pad->dev, np, ops);
+ if (IS_ERR(pad->lanes[i])) {
+ err = PTR_ERR(pad->lanes[i]);
+ of_node_put(np);
+ goto remove;
+ }
+
+ lane = pad->ops->probe(pad, np, i);
+ if (IS_ERR(lane)) {
+ phy_destroy(pad->lanes[i]);
+ err = PTR_ERR(lane);
+ goto remove;
+ }
+
+ list_add_tail(&lane->list, &pad->padctl->lanes);
+ phy_set_drvdata(pad->lanes[i], lane);
+ }
+
+ pad->provider = of_phy_provider_register_full(&pad->dev, children,
+ tegra_xusb_pad_of_xlate);
+ if (IS_ERR(pad->provider)) {
+ err = PTR_ERR(pad->provider);
+ goto remove;
+ }
+
+ return 0;
+
+remove:
+ while (i--)
+ tegra_xusb_lane_destroy(pad->lanes[i]);
+
+ of_node_put(children);
+
+ return err;
+}
+
+void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
+{
+ unsigned int i = pad->soc->num_lanes;
+
+ of_phy_provider_unregister(pad->provider);
+
+ while (i--)
+ tegra_xusb_lane_destroy(pad->lanes[i]);
+
+ device_unregister(&pad->dev);
+}
+
+static struct tegra_xusb_pad *
+tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
+ const struct tegra_xusb_pad_soc *soc)
+{
+ struct tegra_xusb_pad *pad;
+ struct device_node *np;
+ int err;
+
+ np = tegra_xusb_find_pad_node(padctl, soc->name);
+ if (!np || !of_device_is_available(np))
+ return NULL;
+
+ pad = soc->ops->probe(padctl, soc, np);
+ if (IS_ERR(pad)) {
+ err = PTR_ERR(pad);
+ dev_err(padctl->dev, "failed to create pad %s: %d\n",
+ soc->name, err);
+ return ERR_PTR(err);
+ }
+
+ /* XXX move this into ->probe() to avoid string comparison */
+ if (strcmp(soc->name, "pcie") == 0)
+ padctl->pcie = pad;
+
+ if (strcmp(soc->name, "sata") == 0)
+ padctl->sata = pad;
+
+ if (strcmp(soc->name, "usb2") == 0)
+ padctl->usb2 = pad;
+
+ if (strcmp(soc->name, "ulpi") == 0)
+ padctl->ulpi = pad;
+
+ if (strcmp(soc->name, "hsic") == 0)
+ padctl->hsic = pad;
+
+ return pad;
+}
+
+static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
+{
+ struct tegra_xusb_pad *pad, *tmp;
+
+ list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
+ list_del(&pad->list);
+ tegra_xusb_pad_unregister(pad);
+ }
+}
+
+static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
+{
+ mutex_lock(&padctl->lock);
+ __tegra_xusb_remove_pads(padctl);
+ mutex_unlock(&padctl->lock);
+}
+
+static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
+{
+ struct tegra_xusb_padctl *padctl = lane->pad->padctl;
+ const struct tegra_xusb_lane_soc *soc = lane->soc;
+ u32 value;
+
+ /* skip single function lanes */
+ if (soc->num_funcs < 2)
+ return;
+
+ /* choose function */
+ value = padctl_readl(padctl, soc->offset);
+ value &= ~(soc->mask << soc->shift);
+ value |= lane->function << soc->shift;
+ padctl_writel(padctl, value, soc->offset);
+}
+
+static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
+{
+ unsigned int i;
+
+ for (i = 0; i < pad->soc->num_lanes; i++) {
+ struct tegra_xusb_lane *lane;
+
+ if (pad->lanes[i]) {
+ lane = phy_get_drvdata(pad->lanes[i]);
+ tegra_xusb_lane_program(lane);
+ }
+ }
+}
+
+static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
+{
+ struct tegra_xusb_pad *pad;
+ unsigned int i;
+
+ mutex_lock(&padctl->lock);
+
+ for (i = 0; i < padctl->soc->num_pads; i++) {
+ const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
+ int err;
+
+ pad = tegra_xusb_pad_create(padctl, soc);
+ if (IS_ERR(pad)) {
+ err = PTR_ERR(pad);
+ dev_err(padctl->dev, "failed to create pad %s: %d\n",
+ soc->name, err);
+ __tegra_xusb_remove_pads(padctl);
+ mutex_unlock(&padctl->lock);
+ return err;
+ }
+
+ if (!pad)
+ continue;
+
+ list_add_tail(&pad->list, &padctl->pads);
+ }
+
+ list_for_each_entry(pad, &padctl->pads, list)
+ tegra_xusb_pad_program(pad);
+
+ mutex_unlock(&padctl->lock);
+ return 0;
+}
+
+static bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
+ const char *function)
+{
+ const char *func = lane->soc->funcs[lane->function];
+
+ return strcmp(function, func) == 0;
+}
+
+struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
+ const char *type,
+ unsigned int index)
+{
+ struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
+ char *name;
+
+ name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
+ if (!name)
+ return ERR_PTR(-ENOMEM);
+
+ list_for_each_entry(lane, &padctl->lanes, list) {
+ if (strcmp(lane->soc->name, name) == 0) {
+ hit = lane;
+ break;
+ }
+ }
+
+ kfree(name);
+ return hit;
+}
+
+struct tegra_xusb_lane *
+tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
+ const struct tegra_xusb_lane_map *map,
+ const char *function)
+{
+ struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
+
+ for (; map->type; map++) {
+ if (port->index != map->port)
+ continue;
+
+ lane = tegra_xusb_find_lane(port->padctl, map->type,
+ map->index);
+ if (IS_ERR(lane))
+ continue;
+
+ if (!tegra_xusb_lane_check(lane, function))
+ continue;
+
+ if (!IS_ERR(match))
+ dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
+ map->type, map->index, match->soc->name);
+ else
+ match = lane;
+ }
+
+ return match;
+}
+
+static struct device_node *
+tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
+ unsigned int index)
+{
+ struct device_node *ports, *np;
+ char *name;
+
+ ports = of_get_child_by_name(padctl->dev->of_node, "ports");
+ if (!ports)
+ return NULL;
+
+ name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
+ if (!name) {
+ of_node_put(ports);
+ return ERR_PTR(-ENOMEM);
+ }
+ np = of_get_child_by_name(ports, name);
+ kfree(name);
+ of_node_put(ports);
+
+ return np;
+}
+
+struct tegra_xusb_port *
+tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
+ unsigned int index)
+{
+ struct tegra_xusb_port *port;
+ struct device_node *np;
+
+ np = tegra_xusb_find_port_node(padctl, type, index);
+ if (!np)
+ return NULL;
+
+ list_for_each_entry(port, &padctl->ports, list) {
+ if (np == port->dev.of_node) {
+ of_node_put(np);
+ return port;
+ }
+ }
+
+ of_node_put(np);
+
+ return NULL;
+}
+
+struct tegra_xusb_usb2_port *
+tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
+{
+ struct tegra_xusb_port *port;
+
+ port = tegra_xusb_find_port(padctl, "usb2", index);
+ if (port)
+ return to_usb2_port(port);
+
+ return NULL;
+}
+
+struct tegra_xusb_usb3_port *
+tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
+{
+ struct tegra_xusb_port *port;
+
+ port = tegra_xusb_find_port(padctl, "usb3", index);
+ if (port)
+ return to_usb3_port(port);
+
+ return NULL;
+}
+
+static void tegra_xusb_port_release(struct device *dev)
+{
+ struct tegra_xusb_port *port = to_tegra_xusb_port(dev);
+
+ if (port->ops->release)
+ port->ops->release(port);
+}
+
+static struct device_type tegra_xusb_port_type = {
+ .release = tegra_xusb_port_release,
+};
+
+static int tegra_xusb_port_init(struct tegra_xusb_port *port,
+ struct tegra_xusb_padctl *padctl,
+ struct device_node *np,
+ const char *name,
+ unsigned int index)
+{
+ int err;
+
+ INIT_LIST_HEAD(&port->list);
+ port->padctl = padctl;
+ port->index = index;
+
+ device_initialize(&port->dev);
+ port->dev.type = &tegra_xusb_port_type;
+ port->dev.of_node = of_node_get(np);
+ port->dev.parent = padctl->dev;
+
+ err = dev_set_name(&port->dev, "%s-%u", name, index);
+ if (err < 0)
+ goto unregister;
+
+ err = device_add(&port->dev);
+ if (err < 0)
+ goto unregister;
+
+ return 0;
+
+unregister:
+ device_unregister(&port->dev);
+ return err;
+}
+
+static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
+{
+ if (!IS_ERR_OR_NULL(port->usb_role_sw)) {
+ of_platform_depopulate(&port->dev);
+ usb_role_switch_unregister(port->usb_role_sw);
+ cancel_work_sync(&port->usb_phy_work);
+ usb_remove_phy(&port->usb_phy);
+ port->usb_phy.dev->driver = NULL;
+ }
+
+ if (port->ops->remove)
+ port->ops->remove(port);
+
+ device_unregister(&port->dev);
+}
+
+static const char *const modes[] = {
+ [USB_DR_MODE_UNKNOWN] = "",
+ [USB_DR_MODE_HOST] = "host",
+ [USB_DR_MODE_PERIPHERAL] = "peripheral",
+ [USB_DR_MODE_OTG] = "otg",
+};
+
+static const char * const usb_roles[] = {
+ [USB_ROLE_NONE] = "none",
+ [USB_ROLE_HOST] = "host",
+ [USB_ROLE_DEVICE] = "device",
+};
+
+static enum usb_phy_events to_usb_phy_event(enum usb_role role)
+{
+ switch (role) {
+ case USB_ROLE_DEVICE:
+ return USB_EVENT_VBUS;
+
+ case USB_ROLE_HOST:
+ return USB_EVENT_ID;
+
+ default:
+ return USB_EVENT_NONE;
+ }
+}
+
+static void tegra_xusb_usb_phy_work(struct work_struct *work)
+{
+ struct tegra_xusb_port *port = container_of(work,
+ struct tegra_xusb_port,
+ usb_phy_work);
+ enum usb_role role = usb_role_switch_get_role(port->usb_role_sw);
+
+ usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role));
+
+ dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__,
+ usb_roles[role]);
+
+ atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy);
+}
+
+static int tegra_xusb_role_sw_set(struct usb_role_switch *sw,
+ enum usb_role role)
+{
+ struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw);
+
+ dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]);
+
+ schedule_work(&port->usb_phy_work);
+
+ return 0;
+}
+
+static int tegra_xusb_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ struct tegra_xusb_port *port = container_of(otg->usb_phy,
+ struct tegra_xusb_port,
+ usb_phy);
+
+ if (gadget != NULL)
+ schedule_work(&port->usb_phy_work);
+
+ return 0;
+}
+
+static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ struct tegra_xusb_port *port = container_of(otg->usb_phy,
+ struct tegra_xusb_port,
+ usb_phy);
+
+ if (host != NULL)
+ schedule_work(&port->usb_phy_work);
+
+ return 0;
+}
+
+
+static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port)
+{
+ struct tegra_xusb_lane *lane;
+ struct usb_role_switch_desc role_sx_desc = {
+ .fwnode = dev_fwnode(&port->dev),
+ .set = tegra_xusb_role_sw_set,
+ };
+ int err = 0;
+
+ /*
+ * USB role switch driver needs parent driver owner info. This is a
+ * suboptimal solution. TODO: Need to revisit this in a follow-up patch
+ * where an optimal solution is possible with changes to USB role
+ * switch driver.
+ */
+ port->dev.driver = devm_kzalloc(&port->dev,
+ sizeof(struct device_driver),
+ GFP_KERNEL);
+ if (!port->dev.driver)
+ return -ENOMEM;
+
+ port->dev.driver->owner = THIS_MODULE;
+
+ port->usb_role_sw = usb_role_switch_register(&port->dev,
+ &role_sx_desc);
+ if (IS_ERR(port->usb_role_sw)) {
+ err = PTR_ERR(port->usb_role_sw);
+ dev_err(&port->dev, "failed to register USB role switch: %d",
+ err);
+ return err;
+ }
+
+ INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work);
+ usb_role_switch_set_drvdata(port->usb_role_sw, port);
+
+ port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg),
+ GFP_KERNEL);
+ if (!port->usb_phy.otg)
+ return -ENOMEM;
+
+ lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index);
+
+ /*
+ * Assign phy dev to usb-phy dev. Host/device drivers can use phy
+ * reference to retrieve usb-phy details.
+ */
+ port->usb_phy.dev = &lane->pad->lanes[port->index]->dev;
+ port->usb_phy.dev->driver = port->dev.driver;
+ port->usb_phy.otg->usb_phy = &port->usb_phy;
+ port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral;
+ port->usb_phy.otg->set_host = tegra_xusb_set_host;
+
+ err = usb_add_phy_dev(&port->usb_phy);
+ if (err < 0) {
+ dev_err(&port->dev, "Failed to add USB PHY: %d\n", err);
+ return err;
+ }
+
+ /* populate connector entry */
+ of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev);
+
+ return err;
+}
+
+static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
+{
+ struct tegra_xusb_port *port = &usb2->base;
+ struct device_node *np = port->dev.of_node;
+ const char *mode;
+ int err;
+
+ usb2->internal = of_property_read_bool(np, "nvidia,internal");
+
+ if (!of_property_read_string(np, "mode", &mode)) {
+ int err = match_string(modes, ARRAY_SIZE(modes), mode);
+ if (err < 0) {
+ dev_err(&port->dev, "invalid value %s for \"mode\"\n",
+ mode);
+ usb2->mode = USB_DR_MODE_UNKNOWN;
+ } else {
+ usb2->mode = err;
+ }
+ } else {
+ usb2->mode = USB_DR_MODE_HOST;
+ }
+
+ /* usb-role-switch property is mandatory for OTG/Peripheral modes */
+ if (usb2->mode == USB_DR_MODE_PERIPHERAL ||
+ usb2->mode == USB_DR_MODE_OTG) {
+ if (of_property_read_bool(np, "usb-role-switch")) {
+ err = tegra_xusb_setup_usb_role_switch(port);
+ if (err < 0)
+ return err;
+ } else {
+ dev_err(&port->dev, "usb-role-switch not found for %s mode",
+ modes[usb2->mode]);
+ return -EINVAL;
+ }
+ }
+
+ usb2->supply = regulator_get(&port->dev, "vbus");
+ return PTR_ERR_OR_ZERO(usb2->supply);
+}
+
+static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
+ unsigned int index)
+{
+ struct tegra_xusb_usb2_port *usb2;
+ struct device_node *np;
+ int err = 0;
+
+ /*
+ * USB2 ports don't require additional properties, but if the port is
+ * marked as disabled there is no reason to register it.
+ */
+ np = tegra_xusb_find_port_node(padctl, "usb2", index);
+ if (!np || !of_device_is_available(np))
+ goto out;
+
+ usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL);
+ if (!usb2) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
+ if (err < 0)
+ goto out;
+
+ usb2->base.ops = padctl->soc->ports.usb2.ops;
+
+ usb2->base.lane = usb2->base.ops->map(&usb2->base);
+ if (IS_ERR(usb2->base.lane)) {
+ err = PTR_ERR(usb2->base.lane);
+ tegra_xusb_port_unregister(&usb2->base);
+ goto out;
+ }
+
+ err = tegra_xusb_usb2_port_parse_dt(usb2);
+ if (err < 0) {
+ tegra_xusb_port_unregister(&usb2->base);
+ goto out;
+ }
+
+ list_add_tail(&usb2->base.list, &padctl->ports);
+
+out:
+ of_node_put(np);
+ return err;
+}
+
+void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port)
+{
+ struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
+
+ kfree(usb2);
+}
+
+void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port)
+{
+ struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
+
+ regulator_put(usb2->supply);
+}
+
+static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
+{
+ struct tegra_xusb_port *port = &ulpi->base;
+ struct device_node *np = port->dev.of_node;
+
+ ulpi->internal = of_property_read_bool(np, "nvidia,internal");
+
+ return 0;
+}
+
+static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
+ unsigned int index)
+{
+ struct tegra_xusb_ulpi_port *ulpi;
+ struct device_node *np;
+ int err = 0;
+
+ np = tegra_xusb_find_port_node(padctl, "ulpi", index);
+ if (!np || !of_device_is_available(np))
+ goto out;
+
+ ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
+ if (!ulpi) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
+ if (err < 0)
+ goto out;
+
+ ulpi->base.ops = padctl->soc->ports.ulpi.ops;
+
+ ulpi->base.lane = ulpi->base.ops->map(&ulpi->base);
+ if (IS_ERR(ulpi->base.lane)) {
+ err = PTR_ERR(ulpi->base.lane);
+ tegra_xusb_port_unregister(&ulpi->base);
+ goto out;
+ }
+
+ err = tegra_xusb_ulpi_port_parse_dt(ulpi);
+ if (err < 0) {
+ tegra_xusb_port_unregister(&ulpi->base);
+ goto out;
+ }
+
+ list_add_tail(&ulpi->base.list, &padctl->ports);
+
+out:
+ of_node_put(np);
+ return err;
+}
+
+void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port)
+{
+ struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port);
+
+ kfree(ulpi);
+}
+
+static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
+{
+ /* XXX */
+ return 0;
+}
+
+static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
+ unsigned int index)
+{
+ struct tegra_xusb_hsic_port *hsic;
+ struct device_node *np;
+ int err = 0;
+
+ np = tegra_xusb_find_port_node(padctl, "hsic", index);
+ if (!np || !of_device_is_available(np))
+ goto out;
+
+ hsic = kzalloc(sizeof(*hsic), GFP_KERNEL);
+ if (!hsic) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
+ if (err < 0)
+ goto out;
+
+ hsic->base.ops = padctl->soc->ports.hsic.ops;
+
+ hsic->base.lane = hsic->base.ops->map(&hsic->base);
+ if (IS_ERR(hsic->base.lane)) {
+ err = PTR_ERR(hsic->base.lane);
+ goto out;
+ }
+
+ err = tegra_xusb_hsic_port_parse_dt(hsic);
+ if (err < 0) {
+ tegra_xusb_port_unregister(&hsic->base);
+ goto out;
+ }
+
+ list_add_tail(&hsic->base.list, &padctl->ports);
+
+out:
+ of_node_put(np);
+ return err;
+}
+
+void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port)
+{
+ struct tegra_xusb_hsic_port *hsic = to_hsic_port(port);
+
+ kfree(hsic);
+}
+
+static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
+{
+ struct tegra_xusb_port *port = &usb3->base;
+ struct device_node *np = port->dev.of_node;
+ enum usb_device_speed maximum_speed;
+ u32 value;
+ int err;
+
+ err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
+ if (err < 0) {
+ dev_err(&port->dev, "failed to read port: %d\n", err);
+ return err;
+ }
+
+ usb3->port = value;
+
+ usb3->internal = of_property_read_bool(np, "nvidia,internal");
+
+ if (device_property_present(&port->dev, "maximum-speed")) {
+ maximum_speed = usb_get_maximum_speed(&port->dev);
+ if (maximum_speed == USB_SPEED_SUPER)
+ usb3->disable_gen2 = true;
+ else if (maximum_speed == USB_SPEED_SUPER_PLUS)
+ usb3->disable_gen2 = false;
+ else
+ return -EINVAL;
+ }
+
+ usb3->supply = regulator_get(&port->dev, "vbus");
+ return PTR_ERR_OR_ZERO(usb3->supply);
+}
+
+static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
+ unsigned int index)
+{
+ struct tegra_xusb_usb3_port *usb3;
+ struct device_node *np;
+ int err = 0;
+
+ /*
+ * If there is no supplemental configuration in the device tree the
+ * port is unusable. But it is valid to configure only a single port,
+ * hence return 0 instead of an error to allow ports to be optional.
+ */
+ np = tegra_xusb_find_port_node(padctl, "usb3", index);
+ if (!np || !of_device_is_available(np))
+ goto out;
+
+ usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL);
+ if (!usb3) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
+ if (err < 0)
+ goto out;
+
+ usb3->base.ops = padctl->soc->ports.usb3.ops;
+
+ usb3->base.lane = usb3->base.ops->map(&usb3->base);
+ if (IS_ERR(usb3->base.lane)) {
+ err = PTR_ERR(usb3->base.lane);
+ goto out;
+ }
+
+ err = tegra_xusb_usb3_port_parse_dt(usb3);
+ if (err < 0) {
+ tegra_xusb_port_unregister(&usb3->base);
+ goto out;
+ }
+
+ list_add_tail(&usb3->base.list, &padctl->ports);
+
+out:
+ of_node_put(np);
+ return err;
+}
+
+void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port)
+{
+ struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port);
+
+ kfree(usb3);
+}
+
+void tegra_xusb_usb3_port_remove(struct tegra_xusb_port *port)
+{
+ struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port);
+
+ regulator_put(usb3->supply);
+}
+
+static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
+{
+ struct tegra_xusb_port *port, *tmp;
+
+ list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
+ list_del(&port->list);
+ tegra_xusb_port_unregister(port);
+ }
+}
+
+static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl)
+{
+ struct device_node *np;
+ unsigned int i;
+
+ for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
+ np = tegra_xusb_find_port_node(padctl, "usb3", i);
+ if (!np || !of_device_is_available(np))
+ return i;
+ }
+
+ return -ENODEV;
+}
+
+static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2)
+{
+ unsigned int i;
+ struct tegra_xusb_usb3_port *usb3;
+ struct tegra_xusb_padctl *padctl = usb2->base.padctl;
+
+ for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
+ usb3 = tegra_xusb_find_usb3_port(padctl, i);
+ if (usb3 && usb3->port == usb2->base.index)
+ return true;
+ }
+
+ return false;
+}
+
+static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2)
+{
+ int fake;
+
+ /* Disable usb3_port_fake usage by default and assign if needed */
+ usb2->usb3_port_fake = -1;
+
+ if ((usb2->mode == USB_DR_MODE_OTG ||
+ usb2->mode == USB_DR_MODE_PERIPHERAL) &&
+ !tegra_xusb_port_is_companion(usb2)) {
+ fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl);
+ if (fake < 0) {
+ dev_err(&usb2->base.dev, "no unused USB3 ports available\n");
+ return -ENODEV;
+ }
+
+ dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake);
+ usb2->usb3_port_fake = fake;
+ }
+
+ return 0;
+}
+
+static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
+{
+ struct tegra_xusb_port *port;
+ struct tegra_xusb_usb2_port *usb2;
+ unsigned int i;
+ int err = 0;
+
+ mutex_lock(&padctl->lock);
+
+ for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
+ err = tegra_xusb_add_usb2_port(padctl, i);
+ if (err < 0)
+ goto remove_ports;
+ }
+
+ for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
+ err = tegra_xusb_add_ulpi_port(padctl, i);
+ if (err < 0)
+ goto remove_ports;
+ }
+
+ for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
+ err = tegra_xusb_add_hsic_port(padctl, i);
+ if (err < 0)
+ goto remove_ports;
+ }
+
+ for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
+ err = tegra_xusb_add_usb3_port(padctl, i);
+ if (err < 0)
+ goto remove_ports;
+ }
+
+ if (padctl->soc->need_fake_usb3_port) {
+ for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
+ usb2 = tegra_xusb_find_usb2_port(padctl, i);
+ if (!usb2)
+ continue;
+
+ err = tegra_xusb_update_usb3_fake_port(usb2);
+ if (err < 0)
+ goto remove_ports;
+ }
+ }
+
+ list_for_each_entry(port, &padctl->ports, list) {
+ err = port->ops->enable(port);
+ if (err < 0)
+ dev_err(padctl->dev, "failed to enable port %s: %d\n",
+ dev_name(&port->dev), err);
+ }
+
+ goto unlock;
+
+remove_ports:
+ __tegra_xusb_remove_ports(padctl);
+unlock:
+ mutex_unlock(&padctl->lock);
+ return err;
+}
+
+static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
+{
+ mutex_lock(&padctl->lock);
+ __tegra_xusb_remove_ports(padctl);
+ mutex_unlock(&padctl->lock);
+}
+
+static int tegra_xusb_padctl_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ const struct tegra_xusb_padctl_soc *soc;
+ struct tegra_xusb_padctl *padctl;
+ const struct of_device_id *match;
+ struct resource *res;
+ int err;
+
+ /* for backwards compatibility with old device trees */
+ np = of_get_child_by_name(np, "pads");
+ if (!np) {
+ dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
+ return tegra_xusb_padctl_legacy_probe(pdev);
+ }
+
+ of_node_put(np);
+
+ match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
+ soc = match->data;
+
+ padctl = soc->ops->probe(&pdev->dev, soc);
+ if (IS_ERR(padctl))
+ return PTR_ERR(padctl);
+
+ platform_set_drvdata(pdev, padctl);
+ INIT_LIST_HEAD(&padctl->ports);
+ INIT_LIST_HEAD(&padctl->lanes);
+ INIT_LIST_HEAD(&padctl->pads);
+ mutex_init(&padctl->lock);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ padctl->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(padctl->regs)) {
+ err = PTR_ERR(padctl->regs);
+ goto remove;
+ }
+
+ padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
+ if (IS_ERR(padctl->rst)) {
+ err = PTR_ERR(padctl->rst);
+ goto remove;
+ }
+
+ padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
+ sizeof(*padctl->supplies), GFP_KERNEL);
+ if (!padctl->supplies) {
+ err = -ENOMEM;
+ goto remove;
+ }
+
+ regulator_bulk_set_supply_names(padctl->supplies,
+ padctl->soc->supply_names,
+ padctl->soc->num_supplies);
+
+ err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
+ padctl->supplies);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
+ goto remove;
+ }
+
+ err = reset_control_deassert(padctl->rst);
+ if (err < 0)
+ goto remove;
+
+ err = regulator_bulk_enable(padctl->soc->num_supplies,
+ padctl->supplies);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
+ goto reset;
+ }
+
+ err = tegra_xusb_setup_pads(padctl);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
+ goto power_down;
+ }
+
+ err = tegra_xusb_setup_ports(padctl);
+ if (err) {
+ const char *level = KERN_ERR;
+
+ if (err == -EPROBE_DEFER)
+ level = KERN_DEBUG;
+
+ dev_printk(level, &pdev->dev,
+ dev_fmt("failed to setup XUSB ports: %d\n"), err);
+ goto remove_pads;
+ }
+
+ return 0;
+
+remove_pads:
+ tegra_xusb_remove_pads(padctl);
+power_down:
+ regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
+reset:
+ reset_control_assert(padctl->rst);
+remove:
+ platform_set_drvdata(pdev, NULL);
+ soc->ops->remove(padctl);
+ return err;
+}
+
+static int tegra_xusb_padctl_remove(struct platform_device *pdev)
+{
+ struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
+ int err;
+
+ tegra_xusb_remove_ports(padctl);
+ tegra_xusb_remove_pads(padctl);
+
+ err = regulator_bulk_disable(padctl->soc->num_supplies,
+ padctl->supplies);
+ if (err < 0)
+ dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
+
+ err = reset_control_assert(padctl->rst);
+ if (err < 0)
+ dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
+
+ padctl->soc->ops->remove(padctl);
+
+ return err;
+}
+
+static struct platform_driver tegra_xusb_padctl_driver = {
+ .driver = {
+ .name = "tegra-xusb-padctl",
+ .of_match_table = tegra_xusb_padctl_of_match,
+ },
+ .probe = tegra_xusb_padctl_probe,
+ .remove = tegra_xusb_padctl_remove,
+};
+module_platform_driver(tegra_xusb_padctl_driver);
+
+struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
+{
+ struct tegra_xusb_padctl *padctl;
+ struct platform_device *pdev;
+ struct device_node *np;
+
+ np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
+ if (!np)
+ return ERR_PTR(-EINVAL);
+
+ /*
+ * This is slightly ugly. A better implementation would be to keep a
+ * registry of pad controllers, but since there will almost certainly
+ * only ever be one per SoC that would be a little overkill.
+ */
+ pdev = of_find_device_by_node(np);
+ if (!pdev) {
+ of_node_put(np);
+ return ERR_PTR(-ENODEV);
+ }
+
+ of_node_put(np);
+
+ padctl = platform_get_drvdata(pdev);
+ if (!padctl) {
+ put_device(&pdev->dev);
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ return padctl;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
+
+void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
+{
+ if (padctl)
+ put_device(padctl->dev);
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
+
+int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
+ unsigned int port)
+{
+ if (padctl->soc->ops->usb3_save_context)
+ return padctl->soc->ops->usb3_save_context(padctl, port);
+
+ return -ENOSYS;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
+
+int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
+ unsigned int port, bool idle)
+{
+ if (padctl->soc->ops->hsic_set_idle)
+ return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
+
+ return -ENOSYS;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
+
+int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
+ unsigned int port, bool enable)
+{
+ if (padctl->soc->ops->usb3_set_lfps_detect)
+ return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
+ enable);
+
+ return -ENOSYS;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
+
+int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
+ bool val)
+{
+ if (padctl->soc->ops->vbus_override)
+ return padctl->soc->ops->vbus_override(padctl, val);
+
+ return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override);
+
+int tegra_phy_xusb_utmi_port_reset(struct phy *phy)
+{
+ struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
+ struct tegra_xusb_padctl *padctl = lane->pad->padctl;
+
+ if (padctl->soc->ops->utmi_port_reset)
+ return padctl->soc->ops->utmi_port_reset(phy);
+
+ return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset);
+
+int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
+ unsigned int port)
+{
+ struct tegra_xusb_usb2_port *usb2;
+ struct tegra_xusb_usb3_port *usb3;
+ int i;
+
+ usb2 = tegra_xusb_find_usb2_port(padctl, port);
+ if (!usb2)
+ return -EINVAL;
+
+ for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
+ usb3 = tegra_xusb_find_usb3_port(padctl, i);
+ if (usb3 && usb3->port == usb2->base.index)
+ return usb3->base.index;
+ }
+
+ return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
+
+MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
+MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
+MODULE_LICENSE("GPL v2");