V4L/DVB (9820): v4l2: add v4l2_device and v4l2_subdev structs to the v4l2 framework.
Start implementing a proper v4l2 framework as discussed during the
Linux Plumbers Conference 2008.
Introduces v4l2_device (for device instances) and v4l2_subdev (representing
sub-device instances).
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Reviewed-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: Andy Walls <awalls@radix.net>
Reviewed-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index 492ab3d..84a2be0 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -10,7 +10,7 @@
omap2cam-objs := omap24xxcam.o omap24xxcam-dma.o
-videodev-objs := v4l2-dev.o v4l2-ioctl.o
+videodev-objs := v4l2-dev.o v4l2-ioctl.o v4l2-device.o v4l2-subdev.o
obj-$(CONFIG_VIDEO_DEV) += videodev.o v4l2-compat-ioctl32.o v4l2-int-device.o
diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c
new file mode 100644
index 0000000..9eefde0
--- /dev/null
+++ b/drivers/media/video/v4l2-device.c
@@ -0,0 +1,86 @@
+/*
+ V4L2 device support.
+
+ Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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/types.h>
+#include <linux/ioctl.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+
+int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev)
+{
+ if (dev == NULL || v4l2_dev == NULL)
+ return -EINVAL;
+ /* Warn if we apparently re-register a device */
+ WARN_ON(dev_get_drvdata(dev));
+ INIT_LIST_HEAD(&v4l2_dev->subdevs);
+ spin_lock_init(&v4l2_dev->lock);
+ v4l2_dev->dev = dev;
+ snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s %s",
+ dev->driver->name, dev->bus_id);
+ dev_set_drvdata(dev, v4l2_dev);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_device_register);
+
+void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
+{
+ struct v4l2_subdev *sd, *next;
+
+ if (v4l2_dev == NULL || v4l2_dev->dev == NULL)
+ return;
+ dev_set_drvdata(v4l2_dev->dev, NULL);
+ /* unregister subdevs */
+ list_for_each_entry_safe(sd, next, &v4l2_dev->subdevs, list)
+ v4l2_device_unregister_subdev(sd);
+
+ v4l2_dev->dev = NULL;
+}
+EXPORT_SYMBOL_GPL(v4l2_device_unregister);
+
+int v4l2_device_register_subdev(struct v4l2_device *dev, struct v4l2_subdev *sd)
+{
+ /* Check for valid input */
+ if (dev == NULL || sd == NULL || !sd->name[0])
+ return -EINVAL;
+ /* Warn if we apparently re-register a subdev */
+ WARN_ON(sd->dev);
+ if (!try_module_get(sd->owner))
+ return -ENODEV;
+ sd->dev = dev;
+ spin_lock(&dev->lock);
+ list_add_tail(&sd->list, &dev->subdevs);
+ spin_unlock(&dev->lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(v4l2_device_register_subdev);
+
+void v4l2_device_unregister_subdev(struct v4l2_subdev *sd)
+{
+ /* return if it isn't registered */
+ if (sd == NULL || sd->dev == NULL)
+ return;
+ spin_lock(&sd->dev->lock);
+ list_del(&sd->list);
+ spin_unlock(&sd->dev->lock);
+ sd->dev = NULL;
+ module_put(sd->owner);
+}
+EXPORT_SYMBOL_GPL(v4l2_device_unregister_subdev);
diff --git a/drivers/media/video/v4l2-subdev.c b/drivers/media/video/v4l2-subdev.c
new file mode 100644
index 0000000..fe1f01c
--- /dev/null
+++ b/drivers/media/video/v4l2-subdev.c
@@ -0,0 +1,108 @@
+/*
+ V4L2 sub-device support.
+
+ Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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/types.h>
+#include <linux/ioctl.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-subdev.h>
+
+int v4l2_subdev_command(struct v4l2_subdev *sd, unsigned cmd, void *arg)
+{
+ switch (cmd) {
+ case VIDIOC_QUERYCTRL:
+ return v4l2_subdev_call(sd, core, querymenu, arg);
+ case VIDIOC_G_CTRL:
+ return v4l2_subdev_call(sd, core, g_ctrl, arg);
+ case VIDIOC_S_CTRL:
+ return v4l2_subdev_call(sd, core, s_ctrl, arg);
+ case VIDIOC_QUERYMENU:
+ return v4l2_subdev_call(sd, core, queryctrl, arg);
+ case VIDIOC_LOG_STATUS:
+ return v4l2_subdev_call(sd, core, log_status);
+ case VIDIOC_G_CHIP_IDENT:
+ return v4l2_subdev_call(sd, core, g_chip_ident, arg);
+ case VIDIOC_INT_S_STANDBY:
+ return v4l2_subdev_call(sd, core, s_standby, *(u32 *)arg);
+ case VIDIOC_INT_RESET:
+ return v4l2_subdev_call(sd, core, reset, *(u32 *)arg);
+ case VIDIOC_INT_S_GPIO:
+ return v4l2_subdev_call(sd, core, s_gpio, *(u32 *)arg);
+ case VIDIOC_INT_INIT:
+ return v4l2_subdev_call(sd, core, init, *(u32 *)arg);
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ case VIDIOC_DBG_G_REGISTER:
+ return v4l2_subdev_call(sd, core, g_register, arg);
+ case VIDIOC_DBG_S_REGISTER:
+ return v4l2_subdev_call(sd, core, s_register, arg);
+#endif
+
+ case VIDIOC_INT_S_TUNER_MODE:
+ return v4l2_subdev_call(sd, tuner, s_mode, *(enum v4l2_tuner_type *)arg);
+ case AUDC_SET_RADIO:
+ return v4l2_subdev_call(sd, tuner, s_radio);
+ case VIDIOC_S_TUNER:
+ return v4l2_subdev_call(sd, tuner, s_tuner, arg);
+ case VIDIOC_G_TUNER:
+ return v4l2_subdev_call(sd, tuner, g_tuner, arg);
+ case VIDIOC_S_STD:
+ return v4l2_subdev_call(sd, tuner, s_std, *(v4l2_std_id *)arg);
+ case VIDIOC_S_FREQUENCY:
+ return v4l2_subdev_call(sd, tuner, s_frequency, arg);
+ case VIDIOC_G_FREQUENCY:
+ return v4l2_subdev_call(sd, tuner, g_frequency, arg);
+ case TUNER_SET_TYPE_ADDR:
+ return v4l2_subdev_call(sd, tuner, s_type_addr, arg);
+ case TUNER_SET_CONFIG:
+ return v4l2_subdev_call(sd, tuner, s_config, arg);
+
+ case VIDIOC_INT_AUDIO_CLOCK_FREQ:
+ return v4l2_subdev_call(sd, audio, s_clock_freq, *(u32 *)arg);
+ case VIDIOC_INT_S_AUDIO_ROUTING:
+ return v4l2_subdev_call(sd, audio, s_routing, arg);
+ case VIDIOC_INT_I2S_CLOCK_FREQ:
+ return v4l2_subdev_call(sd, audio, s_i2s_clock_freq, *(u32 *)arg);
+
+ case VIDIOC_INT_S_VIDEO_ROUTING:
+ return v4l2_subdev_call(sd, video, s_routing, arg);
+ case VIDIOC_INT_S_CRYSTAL_FREQ:
+ return v4l2_subdev_call(sd, video, s_crystal_freq, arg);
+ case VIDIOC_INT_DECODE_VBI_LINE:
+ return v4l2_subdev_call(sd, video, decode_vbi_line, arg);
+ case VIDIOC_INT_S_VBI_DATA:
+ return v4l2_subdev_call(sd, video, s_vbi_data, arg);
+ case VIDIOC_INT_G_VBI_DATA:
+ return v4l2_subdev_call(sd, video, g_vbi_data, arg);
+ case VIDIOC_S_FMT:
+ return v4l2_subdev_call(sd, video, s_fmt, arg);
+ case VIDIOC_G_FMT:
+ return v4l2_subdev_call(sd, video, g_fmt, arg);
+ case VIDIOC_INT_S_STD_OUTPUT:
+ return v4l2_subdev_call(sd, video, s_std_output, *(v4l2_std_id *)arg);
+ case VIDIOC_STREAMON:
+ return v4l2_subdev_call(sd, video, s_stream, 1);
+ case VIDIOC_STREAMOFF:
+ return v4l2_subdev_call(sd, video, s_stream, 0);
+
+ default:
+ return v4l2_subdev_call(sd, core, ioctl, cmd, arg);
+ }
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_command);