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| author | Trent Piepho <xyzzy@speakeasy.org> | 2006-10-04 16:33:51 -0700 |
|---|---|---|
| committer | Trent Piepho <xyzzy@speakeasy.org> | 2006-10-04 16:33:51 -0700 |
| commit | c357ff76a4c4ff3c165f10b16f42454c928e7d13 (patch) | |
| tree | 3467b9d08d1723420568a95be7cf15f99e95a98b /linux/drivers/media/video | |
| parent | a27ae84eafcf32c3a5a0aac91af575e6be8b63b2 (diff) | |
| download | mediapointer-dvb-s2-c357ff76a4c4ff3c165f10b16f42454c928e7d13.tar.gz mediapointer-dvb-s2-c357ff76a4c4ff3c165f10b16f42454c928e7d13.tar.bz2 | |
cx88: Add support for VIDIOC_INT_[SR]_REGISTER ioctls
From: Trent Piepho <xyzzy@speakeasy.org>
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 <xyzzy@speakeasy.org>
Diffstat (limited to 'linux/drivers/media/video')
| -rw-r--r-- | linux/drivers/media/video/cx88/cx88-video.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/linux/drivers/media/video/cx88/cx88-video.c b/linux/drivers/media/video/cx88/cx88-video.c index 9782a3799..1f1640f0f 100644 --- a/linux/drivers/media/video/cx88/cx88-video.c +++ b/linux/drivers/media/video/cx88/cx88-video.c @@ -1779,6 +1779,30 @@ int cx88_do_ioctl(struct inode *inode, struct file *file, int radio, 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, |