V4L/DVB (5144): Restore VIDIOC_INT_[SG]_REGISTER calls

Add support for these ioctls to the video_ioctl2 system and the cx88
driver.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

3 files changed, 59 insertions, 1 deletions

diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index 360046e1d6b..ee8cbd33cfc 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -1385,6 +1385,32 @@ static int vidioc_s_frequency (struct file *file, void *priv,
 		cx88_set_freq (core,f);
 }
 
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int vidioc_g_register (struct file *file, void *fh,
+				struct v4l2_register *reg)
+{
+	struct cx88_core *core = ((struct cx8800_fh*)fh)->dev->core;
+
+	if (reg->i2c_id != 0)
+		return -EINVAL;
+	/* cx2388x has a 24-bit register space */
+	reg->val = cx_read(reg->reg&0xffffff);
+	return 0;
+}
+
+static int vidioc_s_register (struct file *file, void *fh,
+				struct v4l2_register *reg)
+{
+	struct cx88_core *core = ((struct cx8800_fh*)fh)->dev->core;
+
+	if (reg->i2c_id != 0)
+		return -EINVAL;
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+	cx_write(reg->reg&0xffffff, reg->val);
+	return 0;
+}
+#endif
 
 /* ----------------------------------------------------------- */
 /* RADIO ESPECIFIC IOCTLS                                      */
@@ -1656,8 +1682,12 @@ static struct video_device cx8800_video_template =
 	.vidioc_s_tuner       = vidioc_s_tuner,
 	.vidioc_g_frequency   = vidioc_g_frequency,
 	.vidioc_s_frequency   = vidioc_s_frequency,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	.vidioc_g_register    = vidioc_g_register,
+	.vidioc_s_register    = vidioc_s_register,
+#endif
 	.tvnorms              = CX88_NORMS,
-       .current_norm         = V4L2_STD_NTSC_M,
+	.current_norm         = V4L2_STD_NTSC_M,
 };
 
 static const struct file_operations radio_fops =
diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c
index a786c1f5b96..4b5d5f771e4 100644
--- a/drivers/media/video/videodev.c
+++ b/drivers/media/video/videodev.c
@@ -1453,6 +1453,22 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
 		ret=vfd->vidioc_log_status(file, fh);
 		break;
 	}
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	case VIDIOC_INT_G_REGISTER:
+	{
+		struct v4l2_register *p=arg;
+		if (vfd->vidioc_g_register)
+			ret=vfd->vidioc_g_register(file, fh, p);
+		break;
+	}
+	case VIDIOC_INT_S_REGISTER:
+	{
+		struct v4l2_register *p=arg;
+		if (vfd->vidioc_s_register)
+			ret=vfd->vidioc_s_register(file, fh, p);
+		break;
+	}
+#endif
 	} /* switch */
 
 	if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index fb96472a1bd..46eb71f5653 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -77,6 +77,9 @@ int v4l_compat_translate_ioctl(struct inode *inode, struct file *file,
 extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd,
 				unsigned long arg);
 
+/* Forward definition of v4l2-common.h defined structure */
+struct v4l2_register;
+
 /*
  * Newer version of video_device, handled by videodev2.c
  * 	This version moves redundant code from video device code to
@@ -296,6 +299,15 @@ struct video_device
 	int (*vidioc_log_status)       (struct file *file, void *fh);
 
 
+	/* Debugging ioctls */
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	int (*vidioc_g_register)       (struct file *file, void *fh,
+					struct v4l2_register *reg);
+	int (*vidioc_s_register)       (struct file *file, void *fh,
+					struct v4l2_register *reg);
+#endif
+
+
 #ifdef OBSOLETE_OWNER /* to be removed soon */
 /* obsolete -- fops->owner is used instead */
 struct module *owner;