Messages in this thread Patch in this message | | | From | mchehab@infradea ... | Subject | [PATCH 2/2] V4L/DVB (4722): Cx88: Add support for VIDIOC_INT_[SR]_REGISTER ioctls | Date | Wed, 04 Oct 2006 23:59:55 -0300 |
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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> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org> ---
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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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