Added missing tegra files.HEADmaster

1 files changed, 319 insertions, 0 deletions

diff --git a/drivers/media/video/v4l2-subdev.c b/drivers/media/video/v4l2-subdev.c
new file mode 100644
index 00000000000..b7967c9dc4a
--- /dev/null
+++ b/drivers/media/video/v4l2-subdev.c
@@ -0,0 +1,319 @@
+/*
+ * V4L2 sub-device
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *          Sakari Ailus <sakari.ailus@iki.fi>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/ioctl.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+
+static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd)
+{
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+        /* Allocate try format and crop in the same memory block */
+        fh->try_fmt = kzalloc((sizeof(*fh->try_fmt) + sizeof(*fh->try_crop))
+                              * sd->entity.num_pads, GFP_KERNEL);
+        if (fh->try_fmt == NULL)
+                return -ENOMEM;
+
+        fh->try_crop = (struct v4l2_rect *)
+                (fh->try_fmt + sd->entity.num_pads);
+#endif
+        return 0;
+}
+
+static void subdev_fh_free(struct v4l2_subdev_fh *fh)
+{
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+        kfree(fh->try_fmt);
+        fh->try_fmt = NULL;
+        fh->try_crop = NULL;
+#endif
+}
+
+static int subdev_open(struct file *file)
+{
+        struct video_device *vdev = video_devdata(file);
+        struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
+        struct v4l2_subdev_fh *subdev_fh;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+        struct media_entity *entity = NULL;
+#endif
+        int ret;
+
+        subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
+        if (subdev_fh == NULL)
+                return -ENOMEM;
+
+        ret = subdev_fh_init(subdev_fh, sd);
+        if (ret) {
+                kfree(subdev_fh);
+                return ret;
+        }
+
+        v4l2_fh_init(&subdev_fh->vfh, vdev);
+        v4l2_fh_add(&subdev_fh->vfh);
+        file->private_data = &subdev_fh->vfh;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+        if (sd->v4l2_dev->mdev) {
+                entity = media_entity_get(&sd->entity);
+                if (!entity) {
+                        ret = -EBUSY;
+                        goto err;
+                }
+        }
+#endif
+
+        if (sd->internal_ops && sd->internal_ops->open) {
+                ret = sd->internal_ops->open(sd, subdev_fh);
+                if (ret < 0)
+                        goto err;
+        }
+
+        return 0;
+
+err:
+#if defined(CONFIG_MEDIA_CONTROLLER)
+        if (entity)
+                media_entity_put(entity);
+#endif
+        v4l2_fh_del(&subdev_fh->vfh);
+        v4l2_fh_exit(&subdev_fh->vfh);
+        subdev_fh_free(subdev_fh);
+        kfree(subdev_fh);
+
+        return ret;
+}
+
+static int subdev_close(struct file *file)
+{
+        struct video_device *vdev = video_devdata(file);
+        struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
+        struct v4l2_fh *vfh = file->private_data;
+        struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
+
+        if (sd->internal_ops && sd->internal_ops->close)
+                sd->internal_ops->close(sd, subdev_fh);
+#if defined(CONFIG_MEDIA_CONTROLLER)
+        if (sd->v4l2_dev->mdev)
+                media_entity_put(&sd->entity);
+#endif
+        v4l2_fh_del(vfh);
+        v4l2_fh_exit(vfh);
+        subdev_fh_free(subdev_fh);
+        kfree(subdev_fh);
+        file->private_data = NULL;
+
+        return 0;
+}
+
+static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
+{
+        struct video_device *vdev = video_devdata(file);
+        struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
+        struct v4l2_fh *vfh = file->private_data;
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+        struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);
+#endif
+
+        switch (cmd) {
+        case VIDIOC_QUERYCTRL:
+                return v4l2_queryctrl(vfh->ctrl_handler, arg);
+
+        case VIDIOC_QUERYMENU:
+                return v4l2_querymenu(vfh->ctrl_handler, arg);
+
+        case VIDIOC_G_CTRL:
+                return v4l2_g_ctrl(vfh->ctrl_handler, arg);
+
+        case VIDIOC_S_CTRL:
+                return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg);
+
+        case VIDIOC_G_EXT_CTRLS:
+                return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
+
+        case VIDIOC_S_EXT_CTRLS:
+                return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
+
+        case VIDIOC_TRY_EXT_CTRLS:
+                return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
+
+        case VIDIOC_DQEVENT:
+                if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
+                        return -ENOIOCTLCMD;
+
+                return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK);
+
+        case VIDIOC_SUBSCRIBE_EVENT:
+                return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg);
+
+        case VIDIOC_UNSUBSCRIBE_EVENT:
+                return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg);
+#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
+        case VIDIOC_SUBDEV_G_FMT: {
+                struct v4l2_subdev_format *format = arg;
+
+                if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
+                    format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+                        return -EINVAL;
+
+                if (format->pad >= sd->entity.num_pads)
+                        return -EINVAL;
+
+                return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format);
+        }
+
+        case VIDIOC_SUBDEV_S_FMT: {
+                struct v4l2_subdev_format *format = arg;
+
+                if (format->which != V4L2_SUBDEV_FORMAT_TRY &&
+                    format->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+                        return -EINVAL;
+
+                if (format->pad >= sd->entity.num_pads)
+                        return -EINVAL;
+
+                return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format);
+        }
+
+        case VIDIOC_SUBDEV_G_CROP: {
+                struct v4l2_subdev_crop *crop = arg;
+
+                if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
+                    crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+                        return -EINVAL;
+
+                if (crop->pad >= sd->entity.num_pads)
+                        return -EINVAL;
+
+                return v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop);
+        }
+
+        case VIDIOC_SUBDEV_S_CROP: {
+                struct v4l2_subdev_crop *crop = arg;
+
+                if (crop->which != V4L2_SUBDEV_FORMAT_TRY &&
+                    crop->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+                        return -EINVAL;
+
+                if (crop->pad >= sd->entity.num_pads)
+                        return -EINVAL;
+
+                return v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop);
+        }
+
+        case VIDIOC_SUBDEV_ENUM_MBUS_CODE: {
+                struct v4l2_subdev_mbus_code_enum *code = arg;
+
+                if (code->pad >= sd->entity.num_pads)
+                        return -EINVAL;
+
+                return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh,
+                                        code);
+        }
+
+        case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: {
+                struct v4l2_subdev_frame_size_enum *fse = arg;
+
+                if (fse->pad >= sd->entity.num_pads)
+                        return -EINVAL;
+
+                return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh,
+                                        fse);
+        }
+
+        case VIDIOC_SUBDEV_G_FRAME_INTERVAL:
+                return v4l2_subdev_call(sd, video, g_frame_interval, arg);
+
+        case VIDIOC_SUBDEV_S_FRAME_INTERVAL:
+                return v4l2_subdev_call(sd, video, s_frame_interval, arg);
+
+        case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: {
+                struct v4l2_subdev_frame_interval_enum *fie = arg;
+
+                if (fie->pad >= sd->entity.num_pads)
+                        return -EINVAL;
+
+                return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh,
+                                        fie);
+        }
+#endif
+        default:
+                return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
+        }
+
+        return 0;
+}
+
+static long subdev_ioctl(struct file *file, unsigned int cmd,
+        unsigned long arg)
+{
+        return video_usercopy(file, cmd, arg, subdev_do_ioctl);
+}
+
+static unsigned int subdev_poll(struct file *file, poll_table *wait)
+{
+        struct video_device *vdev = video_devdata(file);
+        struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
+        struct v4l2_fh *fh = file->private_data;
+
+        if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
+                return POLLERR;
+
+        poll_wait(file, &fh->wait, wait);
+
+        if (v4l2_event_pending(fh))
+                return POLLPRI;
+
+        return 0;
+}
+
+const struct v4l2_file_operations v4l2_subdev_fops = {
+        .owner = THIS_MODULE,
+        .open = subdev_open,
+        .unlocked_ioctl = subdev_ioctl,
+        .release = subdev_close,
+        .poll = subdev_poll,
+};
+
+void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops)
+{
+        INIT_LIST_HEAD(&sd->list);
+        BUG_ON(!ops);
+        sd->ops = ops;
+        sd->v4l2_dev = NULL;
+        sd->flags = 0;
+        sd->name[0] = '\0';
+        sd->grp_id = 0;
+        sd->dev_priv = NULL;
+        sd->host_priv = NULL;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+        sd->entity.name = sd->name;
+        sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV;
+#endif
+}
+EXPORT_SYMBOL(v4l2_subdev_init);