From: Trent Piepho <[email protected]>
Add support for the advanced debugging ioctls, to allow access to the
cx88 registers from userspace. Only i2c_id == 0 is supported, for access
to the cx88 adapter itself. There isn't any support for access to I2C
clients of the adapter. Most of them don't have R/W registers anyway,
and its necessary to use i2c-dev to talk to them from userspace.
Signed-off-by: Trent Piepho <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
---
drivers/media/video/cx88/cx88-video.c | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index cb0c0ee..264cd29 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -1490,6 +1490,30 @@ int cx88_do_ioctl(struct inode *inode, s
mutex_unlock(&core->lock);
return 0;
}
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ /* ioctls to allow direct acces to the cx2388x registers */
+ case VIDIOC_INT_G_REGISTER:
+ {
+ struct v4l2_register *reg = arg;
+
+ if (reg->i2c_id != 0)
+ return -EINVAL;
+ /* cx2388x has a 24-bit register space */
+ reg->val = cx_read(reg->reg&0xffffff);
+ return 0;
+ }
+ case VIDIOC_INT_S_REGISTER:
+ {
+ struct v4l2_register *reg = arg;
+
+ if (reg->i2c_id != 0)
+ return -EINVAL;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ cx_write(reg->reg&0xffffff, reg->val);
+ return 0;
+ }
+#endif
default:
return v4l_compat_translate_ioctl(inode,file,cmd,arg,
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
