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| author | Trent Piepho <xyzzy@speakeasy.org> | 2006-10-04 20:33:51 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2006-12-10 08:50:45 -0200 |
| commit | 902fc997adb7b917e1bd06ad6f2f0d38aa482578 (patch) | |
| tree | a9381a0bda3996fa5631c659b7c87d8c2ea45f1b /drivers | |
| parent | 45a9b83fe4cf91b13900dc665f526f7fd94d484c (diff) | |
| download | blackbird-op-linux-902fc997adb7b917e1bd06ad6f2f0d38aa482578.tar.gz blackbird-op-linux-902fc997adb7b917e1bd06ad6f2f0d38aa482578.zip | |
V4L/DVB (4722): Cx88: Add support for VIDIOC_INT_[SR]_REGISTER ioctls
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>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | 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 90e298d074d1..f27312189d79 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, 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, |
