V4L/DVB (6216): V4L: Int if: add vidioc_int_g_ifparm, other updates

vidioc_int_g_ifparm can be used to obtain hardware-specific information
about the interface used by the slave.

Rearrange v4l2-int-device.h as well.

Also remove useless & characters.

Signed-off-by: Sakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/v4l2-int-device.c

@@ -150,7 +150,7 @@ int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd)
 {
 	return ((v4l2_int_ioctl_func_0 *)
 		find_ioctl(d->u.slave, cmd,
-			   (v4l2_int_ioctl_func *)&no_such_ioctl_0))(d);
+			   (v4l2_int_ioctl_func *)no_such_ioctl_0))(d);
 }
 
 static int no_such_ioctl_1(struct v4l2_int_device *d, void *arg)
@@ -162,5 +162,5 @@ int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg)
 {
 	return ((v4l2_int_ioctl_func_1 *)
 		find_ioctl(d->u.slave, cmd,
-			   (v4l2_int_ioctl_func *)&no_such_ioctl_1))(d, arg);
+			   (v4l2_int_ioctl_func *)no_such_ioctl_1))(d, arg);
 }

include/media/v4l2-int-device.h

@@ -30,11 +30,84 @@
 
 #define V4L2NAMESIZE 32
 
+/*
+ *
+ * The internal V4L2 device interface core.
+ *
+ */
+
 enum v4l2_int_type {
 	v4l2_int_type_master = 1,
 	v4l2_int_type_slave
 };
 
+struct v4l2_int_device;
+
+struct v4l2_int_master {
+	int (*attach)(struct v4l2_int_device *master,
+		      struct v4l2_int_device *slave);
+	void (*detach)(struct v4l2_int_device *master);
+};
+
+typedef int (v4l2_int_ioctl_func)(struct v4l2_int_device *);
+typedef int (v4l2_int_ioctl_func_0)(struct v4l2_int_device *);
+typedef int (v4l2_int_ioctl_func_1)(struct v4l2_int_device *, void *);
+
+struct v4l2_int_ioctl_desc {
+	int num;
+	v4l2_int_ioctl_func *func;
+};
+
+struct v4l2_int_slave {
+	/* Don't touch master. */
+	struct v4l2_int_device *master;
+
+	char attach_to[V4L2NAMESIZE];
+
+	int num_ioctls;
+	struct v4l2_int_ioctl_desc *ioctls;
+};
+
+struct v4l2_int_device {
+	/* Don't touch head. */
+	struct list_head head;
+
+	struct module *module;
+
+	char name[V4L2NAMESIZE];
+
+	enum v4l2_int_type type;
+	union {
+		struct v4l2_int_master *master;
+		struct v4l2_int_slave *slave;
+	} u;
+
+	void *priv;
+};
+
+int v4l2_int_device_register(struct v4l2_int_device *d);
+void v4l2_int_device_unregister(struct v4l2_int_device *d);
+
+int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd);
+int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg);
+
+/*
+ *
+ * Types and definitions for IOCTL commands.
+ *
+ */
+
+/* Slave interface type. */
+enum v4l2_if_type {
+};
+
+struct v4l2_ifparm {
+	enum v4l2_if_type if_type;
+	union {
+	} u;
+};
+
+/* IOCTL command numbers. */
 enum v4l2_int_ioctl_num {
 	/*
 	 *
@@ -62,10 +135,12 @@ enum v4l2_int_ioctl_num {
 	vidioc_int_dev_exit_num,
 	/* Set device power state: 0 is off, non-zero is on. */
 	vidioc_int_s_power_num,
-	/* Get parallel interface clock speed for current settings. */
+	/* Get slave interface parameters. */
+	vidioc_int_g_ifparm_num,
+	/* Get external clock speed for current slave settings. */
 	vidioc_int_g_ext_clk_num,
 	/*
-	 * Tell what the parallel interface clock speed actually is.
+	 * Tell what the generated interface clock speed actually is.
 	 */
 	vidioc_int_s_ext_clk_num,
 	/* Does the slave need to be reset after VIDIOC_DQBUF? */
@@ -91,56 +166,6 @@ enum v4l2_int_ioctl_num {
 	vidioc_int_priv_start_num = 2000,
 };
 
-struct v4l2_int_device;
-
-struct v4l2_int_master {
-	int (*attach)(struct v4l2_int_device *master,
-		      struct v4l2_int_device *slave);
-	void (*detach)(struct v4l2_int_device *master);
-};
-
-typedef int (v4l2_int_ioctl_func)(struct v4l2_int_device *);
-typedef int (v4l2_int_ioctl_func_0)(struct v4l2_int_device *);
-typedef int (v4l2_int_ioctl_func_1)(struct v4l2_int_device *, void *);
-
-struct v4l2_int_ioctl_desc {
-	int num;
-	v4l2_int_ioctl_func *func;
-};
-
-struct v4l2_int_slave {
-	/* Don't touch master. */
-	struct v4l2_int_device *master;
-
-	char attach_to[V4L2NAMESIZE];
-
-	int num_ioctls;
-	struct v4l2_int_ioctl_desc *ioctls;
-};
-
-struct v4l2_int_device {
-	/* Don't touch head. */
-	struct list_head head;
-
-	struct module *module;
-
-	char name[V4L2NAMESIZE];
-
-	enum v4l2_int_type type;
-	union {
-		struct v4l2_int_master *master;
-		struct v4l2_int_slave *slave;
-	} u;
-
-	void *priv;
-};
-
-int v4l2_int_device_register(struct v4l2_int_device *d);
-void v4l2_int_device_unregister(struct v4l2_int_device *d);
-
-int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd);
-int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg);
-
 /*
  *
  * IOCTL wrapper functions for better type checking.
@@ -199,6 +224,7 @@ V4L2_INT_WRAPPER_1(s_parm, struct v4l2_streamparm, *);
 V4L2_INT_WRAPPER_0(dev_init);
 V4L2_INT_WRAPPER_0(dev_exit);
 V4L2_INT_WRAPPER_1(s_power, int, );
+V4L2_INT_WRAPPER_1(g_ifparm, struct v4l2_ifparm, *);
 V4L2_INT_WRAPPER_1(s_ext_clk, u32, );
 V4L2_INT_WRAPPER_1(g_ext_clk, u32, *);
 V4L2_INT_WRAPPER_1(g_needs_reset, void, *);