1 files changed, 91 insertions, 0 deletions

diff --git a/drivers/uwb/pal.c b/drivers/uwb/pal.c
new file mode 100644
index 000000000000..1afb38eacb9a
--- /dev/null
+++ b/drivers/uwb/pal.c
@@ -0,0 +1,91 @@
+/*
+ * UWB PAL support.
+ *
+ * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/uwb.h>
+
+#include "uwb-internal.h"
+
+/**
+ * uwb_pal_init - initialize a UWB PAL
+ * @pal: the PAL to initialize
+ */
+void uwb_pal_init(struct uwb_pal *pal)
+{
+        INIT_LIST_HEAD(&pal->node);
+}
+EXPORT_SYMBOL_GPL(uwb_pal_init);
+
+/**
+ * uwb_pal_register - register a UWB PAL
+ * @rc: the radio controller the PAL will be using
+ * @pal: the PAL
+ *
+ * The PAL must be initialized with uwb_pal_init().
+ */
+int uwb_pal_register(struct uwb_rc *rc, struct uwb_pal *pal)
+{
+        int ret;
+
+        if (pal->device) {
+                ret = sysfs_create_link(&pal->device->kobj,
+                                        &rc->uwb_dev.dev.kobj, "uwb_rc");
+                if (ret < 0)
+                        return ret;
+                ret = sysfs_create_link(&rc->uwb_dev.dev.kobj,
+                                        &pal->device->kobj, pal->name);
+                if (ret < 0) {
+                        sysfs_remove_link(&pal->device->kobj, "uwb_rc");
+                        return ret;
+                }
+        }
+
+        spin_lock(&rc->pal_lock);
+        list_add(&pal->node, &rc->pals);
+        spin_unlock(&rc->pal_lock);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(uwb_pal_register);
+
+/**
+ * uwb_pal_register - unregister a UWB PAL
+ * @rc: the radio controller the PAL was using
+ * @pal: the PAL
+ */
+void uwb_pal_unregister(struct uwb_rc *rc, struct uwb_pal *pal)
+{
+        spin_lock(&rc->pal_lock);
+        list_del(&pal->node);
+        spin_unlock(&rc->pal_lock);
+
+        if (pal->device) {
+                sysfs_remove_link(&rc->uwb_dev.dev.kobj, pal->name);
+                sysfs_remove_link(&pal->device->kobj, "uwb_rc");
+        }
+}
+EXPORT_SYMBOL_GPL(uwb_pal_unregister);
+
+/**
+ * uwb_rc_pal_init - initialize the PAL related parts of a radio controller
+ * @rc: the radio controller
+ */
+void uwb_rc_pal_init(struct uwb_rc *rc)
+{
+        spin_lock_init(&rc->pal_lock);
+        INIT_LIST_HEAD(&rc->pals);
+}