1 files changed, 0 insertions, 457 deletions
diff --git a/drivers/staging/uwb/lc-dev.c b/drivers/staging/uwb/lc-dev.c
deleted file mode 100644
index 3e5c07fd6b10..000000000000
--- a/drivers/staging/uwb/lc-dev.c
+++ /dev/null
@@ -1,457 +0,0 @@
-// 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);