From 55c0d1005a0e5f590f71f918e49bdc81362f93a6 Mon Sep 17 00:00:00 2001
From: Trent Piepho <xyzzy@speakeasy.org>
Date: Fri, 29 Jun 2007 00:17:36 -0300
Subject: [PATCH] V4L/DVB (5807): Bttv: Add support for DBG_[SG]_REGISTER
ioctls
Adds the advanced debugging register read/write ioctl support to the bttv
driver.
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
---
drivers/media/video/bt8xx/bttv-driver.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index 284bdf2d2432..cb555f2c40f9 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -2259,6 +2259,24 @@ static int bttv_common_ioctls(struct bttv *btv, unsigned int cmd, void *arg)
printk(KERN_INFO "bttv%d: ================== END STATUS CARD #%d ==================\n", btv->c.nr, btv->c.nr);
return 0;
}
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ case VIDIOC_DBG_G_REGISTER:
+ case VIDIOC_DBG_S_REGISTER:
+ {
+ struct v4l2_register *reg = arg;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
+ return -EINVAL;
+ /* bt848 has a 12-bit register space */
+ reg->reg &= 0xfff;
+ if (cmd == VIDIOC_DBG_G_REGISTER)
+ reg->val = btread(reg->reg);
+ else
+ btwrite(reg->val, reg->reg);
+ return 0;
+ }
+#endif
default:
return -ENOIOCTLCMD;
@@ -3569,6 +3587,8 @@ static int bttv_do_ioctl(struct inode *inode, struct file *file,
case VIDIOC_G_FREQUENCY:
case VIDIOC_S_FREQUENCY:
case VIDIOC_LOG_STATUS:
+ case VIDIOC_DBG_G_REGISTER:
+ case VIDIOC_DBG_S_REGISTER:
return bttv_common_ioctls(btv,cmd,arg);
default:
@@ -3951,6 +3971,8 @@ static int radio_do_ioctl(struct inode *inode, struct file *file,
case VIDIOCGAUDIO:
case VIDIOCSAUDIO:
case VIDIOC_LOG_STATUS:
+ case VIDIOC_DBG_G_REGISTER:
+ case VIDIOC_DBG_S_REGISTER:
return bttv_common_ioctls(btv,cmd,arg);
default:
--
2.20.1