Added missing tegra files.HEADmaster

1 files changed, 163 insertions, 0 deletions

diff --git a/drivers/media/video/v4l2-int-device.c b/drivers/media/video/v4l2-int-device.c
new file mode 100644
index 00000000000..a935bae538e
--- /dev/null
+++ b/drivers/media/video/v4l2-int-device.c
@@ -0,0 +1,163 @@
+/*
+ * drivers/media/video/v4l2-int-device.c
+ *
+ * V4L2 internal ioctl interface.
+ *
+ * Copyright (C) 2007 Nokia Corporation.
+ *
+ * Contact: Sakari Ailus <sakari.ailus@nokia.com>
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/sort.h>
+#include <linux/string.h>
+
+#include <media/v4l2-int-device.h>
+
+static DEFINE_MUTEX(mutex);
+static LIST_HEAD(int_list);
+
+void v4l2_int_device_try_attach_all(void)
+{
+        struct v4l2_int_device *m, *s;
+
+        list_for_each_entry(m, &int_list, head) {
+                if (m->type != v4l2_int_type_master)
+                        continue;
+
+                list_for_each_entry(s, &int_list, head) {
+                        if (s->type != v4l2_int_type_slave)
+                                continue;
+
+                        /* Slave is connected? */
+                        if (s->u.slave->master)
+                                continue;
+
+                        /* Slave wants to attach to master? */
+                        if (s->u.slave->attach_to[0] != 0
+                            && strncmp(m->name, s->u.slave->attach_to,
+                                       V4L2NAMESIZE))
+                                continue;
+
+                        if (!try_module_get(m->module))
+                                continue;
+
+                        s->u.slave->master = m;
+                        if (m->u.master->attach(s)) {
+                                s->u.slave->master = NULL;
+                                module_put(m->module);
+                                continue;
+                        }
+                }
+        }
+}
+EXPORT_SYMBOL_GPL(v4l2_int_device_try_attach_all);
+
+static int ioctl_sort_cmp(const void *a, const void *b)
+{
+        const struct v4l2_int_ioctl_desc *d1 = a, *d2 = b;
+
+        if (d1->num > d2->num)
+                return 1;
+
+        if (d1->num < d2->num)
+                return -1;
+
+        return 0;
+}
+
+int v4l2_int_device_register(struct v4l2_int_device *d)
+{
+        if (d->type == v4l2_int_type_slave)
+                sort(d->u.slave->ioctls, d->u.slave->num_ioctls,
+                     sizeof(struct v4l2_int_ioctl_desc),
+                     &ioctl_sort_cmp, NULL);
+        mutex_lock(&mutex);
+        list_add(&d->head, &int_list);
+        v4l2_int_device_try_attach_all();
+        mutex_unlock(&mutex);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_int_device_register);
+
+void v4l2_int_device_unregister(struct v4l2_int_device *d)
+{
+        mutex_lock(&mutex);
+        list_del(&d->head);
+        if (d->type == v4l2_int_type_slave
+            && d->u.slave->master != NULL) {
+                d->u.slave->master->u.master->detach(d);
+                module_put(d->u.slave->master->module);
+                d->u.slave->master = NULL;
+        }
+        mutex_unlock(&mutex);
+}
+EXPORT_SYMBOL_GPL(v4l2_int_device_unregister);
+
+/* Adapted from search_extable in extable.c. */
+static v4l2_int_ioctl_func *find_ioctl(struct v4l2_int_slave *slave, int cmd,
+                                       v4l2_int_ioctl_func *no_such_ioctl)
+{
+        const struct v4l2_int_ioctl_desc *first = slave->ioctls;
+        const struct v4l2_int_ioctl_desc *last =
+                first + slave->num_ioctls - 1;
+
+        while (first <= last) {
+                const struct v4l2_int_ioctl_desc *mid;
+
+                mid = (last - first) / 2 + first;
+
+                if (mid->num < cmd)
+                        first = mid + 1;
+                else if (mid->num > cmd)
+                        last = mid - 1;
+                else
+                        return mid->func;
+        }
+
+        return no_such_ioctl;
+}
+
+static int no_such_ioctl_0(struct v4l2_int_device *d)
+{
+        return -ENOIOCTLCMD;
+}
+
+int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd)
+{
+        return ((v4l2_int_ioctl_func_0 *)
+                find_ioctl(d->u.slave, cmd,
+                           (v4l2_int_ioctl_func *)no_such_ioctl_0))(d);
+}
+EXPORT_SYMBOL_GPL(v4l2_int_ioctl_0);
+
+static int no_such_ioctl_1(struct v4l2_int_device *d, void *arg)
+{
+        return -ENOIOCTLCMD;
+}
+
+int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg)
+{
+        return ((v4l2_int_ioctl_func_1 *)
+                find_ioctl(d->u.slave, cmd,
+                           (v4l2_int_ioctl_func *)no_such_ioctl_1))(d, arg);
+}
+EXPORT_SYMBOL_GPL(v4l2_int_ioctl_1);
+
+MODULE_LICENSE("GPL");