Merge tag 'usb-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB updates from Greg KH:
 "Here is the big set of USB patches for 5.4-rc1.

  Two major chunks of code are moving out of the tree and into the
  staging directory, uwb and wusb (wireless USB support), because there
  are no devices that actually use this protocol anymore, and what we
  have today probably doesn't work at all given that the maintainers
  left many many years ago. So move it to staging where it will be
  removed in a few releases if no one screams.

  Other than that, lots of little things. The usual gadget and xhci and
  usb serial driver updates, along with a bunch of sysfs file cleanups
  due to the driver core changes to support that. Nothing really major,
  just constant forward progress.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (159 commits)
  USB: usbcore: Fix slab-out-of-bounds bug during device reset
  usb: cdns3: Remove redundant dev_err call in cdns3_probe()
  USB: rio500: Fix lockdep violation
  USB: rio500: simplify locking
  usb: mtu3: register a USB Role Switch for dual role mode
  usb: common: add USB GPIO based connection detection driver
  usb: common: create Kconfig file
  usb: roles: get usb-role-switch from parent
  usb: roles: Add fwnode_usb_role_switch_get() function
  device connection: Add fwnode_connection_find_match()
  usb: roles: Introduce stubs for the exiting functions in role.h
  dt-bindings: usb: mtu3: add properties about USB Role Switch
  dt-bindings: usb: add binding for USB GPIO based connection detection driver
  dt-bindings: connector: add optional properties for Type-B
  dt-binding: usb: add usb-role-switch property
  usbip: Implement SG support to vhci-hcd and stub driver
  usb: roles: intel: Enable static DRD mode for role switch
  xhci-ext-caps.c: Add property to disable Intel SW switch
  usb: dwc3: remove generic PHY calibrate() calls
  usb: core: phy: add support for PHY calibration
  ...

1 files changed, 457 insertions, 0 deletions

diff --git a/drivers/staging/uwb/lc-dev.c b/drivers/staging/uwb/lc-dev.c
new file mode 100644
index 000000000000..3e5c07fd6b10
--- /dev/null
+++ b/drivers/staging/uwb/lc-dev.c
@@ -0,0 +1,457 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Ultra Wide Band
+ * Life cycle of devices
+ *
+ * Copyright (C) 2005-2006 Intel Corporation
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * FIXME: docs
+ */
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/err.h>
+#include <linux/kdev_t.h>
+#include <linux/random.h>
+#include <linux/stat.h>
+#include "uwb-internal.h"
+
+/* We initialize addresses to 0xff (invalid, as it is bcast) */
+static inline void uwb_dev_addr_init(struct uwb_dev_addr *addr)
+{
+	memset(&addr->data, 0xff, sizeof(addr->data));
+}
+
+static inline void uwb_mac_addr_init(struct uwb_mac_addr *addr)
+{
+	memset(&addr->data, 0xff, sizeof(addr->data));
+}
+
+/*
+ * Add callback @new to be called when an event occurs in @rc.
+ */
+int uwb_notifs_register(struct uwb_rc *rc, struct uwb_notifs_handler *new)
+{
+	if (mutex_lock_interruptible(&rc->notifs_chain.mutex))
+		return -ERESTARTSYS;
+	list_add(&new->list_node, &rc->notifs_chain.list);
+	mutex_unlock(&rc->notifs_chain.mutex);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(uwb_notifs_register);
+
+/*
+ * Remove event handler (callback)
+ */
+int uwb_notifs_deregister(struct uwb_rc *rc, struct uwb_notifs_handler *entry)
+{
+	if (mutex_lock_interruptible(&rc->notifs_chain.mutex))
+		return -ERESTARTSYS;
+	list_del(&entry->list_node);
+	mutex_unlock(&rc->notifs_chain.mutex);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(uwb_notifs_deregister);
+
+/*
+ * Notify all event handlers of a given event on @rc
+ *
+ * We are called with a valid reference to the device, or NULL if the
+ * event is not for a particular event (e.g., a BG join event).
+ */
+void uwb_notify(struct uwb_rc *rc, struct uwb_dev *uwb_dev, enum uwb_notifs event)
+{
+	struct uwb_notifs_handler *handler;
+	if (mutex_lock_interruptible(&rc->notifs_chain.mutex))
+		return;
+	if (!list_empty(&rc->notifs_chain.list)) {
+		list_for_each_entry(handler, &rc->notifs_chain.list, list_node) {
+			handler->cb(handler->data, uwb_dev, event);
+		}
+	}
+	mutex_unlock(&rc->notifs_chain.mutex);
+}
+
+/*
+ * Release the backing device of a uwb_dev that has been dynamically allocated.
+ */
+static void uwb_dev_sys_release(struct device *dev)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+
+	uwb_bce_put(uwb_dev->bce);
+	memset(uwb_dev, 0x69, sizeof(*uwb_dev));
+	kfree(uwb_dev);
+}
+
+/*
+ * Initialize a UWB device instance
+ *
+ * Alloc, zero and call this function.
+ */
+void uwb_dev_init(struct uwb_dev *uwb_dev)
+{
+	mutex_init(&uwb_dev->mutex);
+	device_initialize(&uwb_dev->dev);
+	uwb_dev->dev.release = uwb_dev_sys_release;
+	uwb_dev_addr_init(&uwb_dev->dev_addr);
+	uwb_mac_addr_init(&uwb_dev->mac_addr);
+	bitmap_fill(uwb_dev->streams, UWB_NUM_GLOBAL_STREAMS);
+}
+
+static ssize_t uwb_dev_EUI_48_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+	char addr[UWB_ADDR_STRSIZE];
+
+	uwb_mac_addr_print(addr, sizeof(addr), &uwb_dev->mac_addr);
+	return sprintf(buf, "%s\n", addr);
+}
+static DEVICE_ATTR(EUI_48, S_IRUGO, uwb_dev_EUI_48_show, NULL);
+
+static ssize_t uwb_dev_DevAddr_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+	char addr[UWB_ADDR_STRSIZE];
+
+	uwb_dev_addr_print(addr, sizeof(addr), &uwb_dev->dev_addr);
+	return sprintf(buf, "%s\n", addr);
+}
+static DEVICE_ATTR(DevAddr, S_IRUGO, uwb_dev_DevAddr_show, NULL);
+
+/*
+ * Show the BPST of this device.
+ *
+ * Calculated from the receive time of the device's beacon and it's
+ * slot number.
+ */
+static ssize_t uwb_dev_BPST_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+	struct uwb_beca_e *bce;
+	struct uwb_beacon_frame *bf;
+	u16 bpst;
+
+	bce = uwb_dev->bce;
+	mutex_lock(&bce->mutex);
+	bf = (struct uwb_beacon_frame *)bce->be->BeaconInfo;
+	bpst = bce->be->wBPSTOffset
+		- (u16)(bf->Beacon_Slot_Number * UWB_BEACON_SLOT_LENGTH_US);
+	mutex_unlock(&bce->mutex);
+
+	return sprintf(buf, "%d\n", bpst);
+}
+static DEVICE_ATTR(BPST, S_IRUGO, uwb_dev_BPST_show, NULL);
+
+/*
+ * Show the IEs a device is beaconing
+ *
+ * We need to access the beacon cache, so we just lock it really
+ * quick, print the IEs and unlock.
+ *
+ * We have a reference on the cache entry, so that should be
+ * quite safe.
+ */
+static ssize_t uwb_dev_IEs_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+
+	return uwb_bce_print_IEs(uwb_dev, uwb_dev->bce, buf, PAGE_SIZE);
+}
+static DEVICE_ATTR(IEs, S_IRUGO | S_IWUSR, uwb_dev_IEs_show, NULL);
+
+static ssize_t uwb_dev_LQE_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+	struct uwb_beca_e *bce = uwb_dev->bce;
+	size_t result;
+
+	mutex_lock(&bce->mutex);
+	result = stats_show(&uwb_dev->bce->lqe_stats, buf);
+	mutex_unlock(&bce->mutex);
+	return result;
+}
+
+static ssize_t uwb_dev_LQE_store(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf, size_t size)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+	struct uwb_beca_e *bce = uwb_dev->bce;
+	ssize_t result;
+
+	mutex_lock(&bce->mutex);
+	result = stats_store(&uwb_dev->bce->lqe_stats, buf, size);
+	mutex_unlock(&bce->mutex);
+	return result;
+}
+static DEVICE_ATTR(LQE, S_IRUGO | S_IWUSR, uwb_dev_LQE_show, uwb_dev_LQE_store);
+
+static ssize_t uwb_dev_RSSI_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+	struct uwb_beca_e *bce = uwb_dev->bce;
+	size_t result;
+
+	mutex_lock(&bce->mutex);
+	result = stats_show(&uwb_dev->bce->rssi_stats, buf);
+	mutex_unlock(&bce->mutex);
+	return result;
+}
+
+static ssize_t uwb_dev_RSSI_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t size)
+{
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+	struct uwb_beca_e *bce = uwb_dev->bce;
+	ssize_t result;
+
+	mutex_lock(&bce->mutex);
+	result = stats_store(&uwb_dev->bce->rssi_stats, buf, size);
+	mutex_unlock(&bce->mutex);
+	return result;
+}
+static DEVICE_ATTR(RSSI, S_IRUGO | S_IWUSR, uwb_dev_RSSI_show, uwb_dev_RSSI_store);
+
+
+static struct attribute *uwb_dev_attrs[] = {
+	&dev_attr_EUI_48.attr,
+	&dev_attr_DevAddr.attr,
+	&dev_attr_BPST.attr,
+	&dev_attr_IEs.attr,
+	&dev_attr_LQE.attr,
+	&dev_attr_RSSI.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(uwb_dev);
+
+/* UWB bus type. */
+struct bus_type uwb_bus_type = {
+	.name =		"uwb",
+	.dev_groups =	uwb_dev_groups,
+};
+
+/**
+ * Device SYSFS registration
+ */
+static int __uwb_dev_sys_add(struct uwb_dev *uwb_dev, struct device *parent_dev)
+{
+	struct device *dev;
+
+	dev = &uwb_dev->dev;
+	dev->parent = parent_dev;
+	dev_set_drvdata(dev, uwb_dev);
+
+	return device_add(dev);
+}
+
+
+static void __uwb_dev_sys_rm(struct uwb_dev *uwb_dev)
+{
+	dev_set_drvdata(&uwb_dev->dev, NULL);
+	device_del(&uwb_dev->dev);
+}
+
+
+/**
+ * Register and initialize a new UWB device
+ *
+ * Did you call uwb_dev_init() on it?
+ *
+ * @parent_rc: is the parent radio controller who has the link to the
+ *             device. When registering the UWB device that is a UWB
+ *             Radio Controller, we point back to it.
+ *
+ * If registering the device that is part of a radio, caller has set
+ * rc->uwb_dev->dev. Otherwise it is to be left NULL--a new one will
+ * be allocated.
+ */
+int uwb_dev_add(struct uwb_dev *uwb_dev, struct device *parent_dev,
+		struct uwb_rc *parent_rc)
+{
+	int result;
+	struct device *dev;
+
+	BUG_ON(uwb_dev == NULL);
+	BUG_ON(parent_dev == NULL);
+	BUG_ON(parent_rc == NULL);
+
+	mutex_lock(&uwb_dev->mutex);
+	dev = &uwb_dev->dev;
+	uwb_dev->rc = parent_rc;
+	result = __uwb_dev_sys_add(uwb_dev, parent_dev);
+	if (result < 0)
+		printk(KERN_ERR "UWB: unable to register dev %s with sysfs: %d\n",
+		       dev_name(dev), result);
+	mutex_unlock(&uwb_dev->mutex);
+	return result;
+}
+
+
+void uwb_dev_rm(struct uwb_dev *uwb_dev)
+{
+	mutex_lock(&uwb_dev->mutex);
+	__uwb_dev_sys_rm(uwb_dev);
+	mutex_unlock(&uwb_dev->mutex);
+}
+
+
+static
+int __uwb_dev_try_get(struct device *dev, void *__target_uwb_dev)
+{
+	struct uwb_dev *target_uwb_dev = __target_uwb_dev;
+	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
+	if (uwb_dev == target_uwb_dev) {
+		uwb_dev_get(uwb_dev);
+		return 1;
+	} else
+		return 0;
+}
+
+
+/**
+ * Given a UWB device descriptor, validate and refcount it
+ *
+ * @returns NULL if the device does not exist or is quiescing; the ptr to
+ *               it otherwise.
+ */
+struct uwb_dev *uwb_dev_try_get(struct uwb_rc *rc, struct uwb_dev *uwb_dev)
+{
+	if (uwb_dev_for_each(rc, __uwb_dev_try_get, uwb_dev))
+		return uwb_dev;
+	else
+		return NULL;
+}
+EXPORT_SYMBOL_GPL(uwb_dev_try_get);
+
+
+/**
+ * Remove a device from the system [grunt for other functions]
+ */
+int __uwb_dev_offair(struct uwb_dev *uwb_dev, struct uwb_rc *rc)
+{
+	struct device *dev = &uwb_dev->dev;
+	char macbuf[UWB_ADDR_STRSIZE], devbuf[UWB_ADDR_STRSIZE];
+
+	uwb_mac_addr_print(macbuf, sizeof(macbuf), &uwb_dev->mac_addr);
+	uwb_dev_addr_print(devbuf, sizeof(devbuf), &uwb_dev->dev_addr);
+	dev_info(dev, "uwb device (mac %s dev %s) disconnected from %s %s\n",
+		 macbuf, devbuf,
+		 uwb_dev->dev.bus->name,
+		 rc ? dev_name(&(rc->uwb_dev.dev)) : "");
+	uwb_dev_rm(uwb_dev);
+	list_del(&uwb_dev->bce->node);
+	uwb_bce_put(uwb_dev->bce);
+	uwb_dev_put(uwb_dev);	/* for the creation in _onair() */
+
+	return 0;
+}
+
+
+/**
+ * A device went off the air, clean up after it!
+ *
+ * This is called by the UWB Daemon (through the beacon purge function
+ * uwb_bcn_cache_purge) when it is detected that a device has been in
+ * radio silence for a while.
+ *
+ * If this device is actually a local radio controller we don't need
+ * to go through the offair process, as it is not registered as that.
+ *
+ * NOTE: uwb_bcn_cache.mutex is held!
+ */
+void uwbd_dev_offair(struct uwb_beca_e *bce)
+{
+	struct uwb_dev *uwb_dev;
+
+	uwb_dev = bce->uwb_dev;
+	if (uwb_dev) {
+		uwb_notify(uwb_dev->rc, uwb_dev, UWB_NOTIF_OFFAIR);
+		__uwb_dev_offair(uwb_dev, uwb_dev->rc);
+	}
+}
+
+
+/**
+ * A device went on the air, start it up!
+ *
+ * This is called by the UWB Daemon when it is detected that a device
+ * has popped up in the radio range of the radio controller.
+ *
+ * It will just create the freaking device, register the beacon and
+ * stuff and yatla, done.
+ *
+ *
+ * NOTE: uwb_beca.mutex is held, bce->mutex is held
+ */
+void uwbd_dev_onair(struct uwb_rc *rc, struct uwb_beca_e *bce)
+{
+	int result;
+	struct device *dev = &rc->uwb_dev.dev;
+	struct uwb_dev *uwb_dev;
+	char macbuf[UWB_ADDR_STRSIZE], devbuf[UWB_ADDR_STRSIZE];
+
+	uwb_mac_addr_print(macbuf, sizeof(macbuf), bce->mac_addr);
+	uwb_dev_addr_print(devbuf, sizeof(devbuf), &bce->dev_addr);
+	uwb_dev = kzalloc(sizeof(struct uwb_dev), GFP_KERNEL);
+	if (uwb_dev == NULL) {
+		dev_err(dev, "new device %s: Cannot allocate memory\n",
+			macbuf);
+		return;
+	}
+	uwb_dev_init(uwb_dev);		/* This sets refcnt to one, we own it */
+	uwb_dev->dev.bus = &uwb_bus_type;
+	uwb_dev->mac_addr = *bce->mac_addr;
+	uwb_dev->dev_addr = bce->dev_addr;
+	dev_set_name(&uwb_dev->dev, "%s", macbuf);
+
+	/* plug the beacon cache */
+	bce->uwb_dev = uwb_dev;
+	uwb_dev->bce = bce;
+	uwb_bce_get(bce);		/* released in uwb_dev_sys_release() */
+
+	result = uwb_dev_add(uwb_dev, &rc->uwb_dev.dev, rc);
+	if (result < 0) {
+		dev_err(dev, "new device %s: cannot instantiate device\n",
+			macbuf);
+		goto error_dev_add;
+	}
+
+	dev_info(dev, "uwb device (mac %s dev %s) connected to %s %s\n",
+		 macbuf, devbuf, uwb_dev->dev.bus->name,
+		 dev_name(&(rc->uwb_dev.dev)));
+	uwb_notify(rc, uwb_dev, UWB_NOTIF_ONAIR);
+	return;
+
+error_dev_add:
+	bce->uwb_dev = NULL;
+	uwb_bce_put(bce);
+	kfree(uwb_dev);
+	return;
+}
+
+/**
+ * Iterate over the list of UWB devices, calling a @function on each
+ *
+ * See docs for bus_for_each()....
+ *
+ * @rc:       radio controller for the devices.
+ * @function: function to call.
+ * @priv:     data to pass to @function.
+ * @returns:  0 if no invocation of function() returned a value
+ *            different to zero. That value otherwise.
+ */
+int uwb_dev_for_each(struct uwb_rc *rc, uwb_dev_for_each_f function, void *priv)
+{
+	return device_for_each_child(&rc->uwb_dev.dev, priv, function);
+}
+EXPORT_SYMBOL_GPL(uwb_dev_for_each);