Add support for /dev/vmeta miscdevice

The kernel folk don't like the uio ioctl idea, so we can't use uio for
this driver.  Instead, switch it to be a self-contained miscdevice.

This adds support to this library for the miscdevice interface.

1 files changed, 39 insertions, 17 deletions

diff --git a/uio_vmeta.h b/uio_vmeta.h
index d1cef5f..6f262a7 100644
--- a/uio_vmeta.h
+++ b/uio_vmeta.h
@@ -10,39 +10,60 @@
 #define __UIO_VMETA_H
 
 typedef unsigned int vmeta_instance_status;
-typedef struct _id_instance
-{
-	vmeta_instance_status	status;
-	int						height;
-	int						width;
-	int						frame_rate;
-	pid_t					pid;
-	unsigned int			pt;//pthread_t
-}id_instance;
+
+struct _id_instance {
+	vmeta_instance_status status;
+	int height;
+	int width;
+	int frame_rate;
+	pid_t pid;
+	unsigned int pt; /* pthread_t */
+};
 
 #define MAX_VMETA_INSTANCE 32
 
-typedef enum _VMETA_LOCK_FLAG{
+enum _VMETA_LOCK_FLAG {
 	VMETA_LOCK_OFF = 0,
 	VMETA_LOCK_ON,
 	VMETA_LOCK_FORCE_INIT
-}VMETA_LOCK_FLAG;
+};
 
 /* This struct should be aligned with user space API */
-typedef struct _kernel_share
-{
+struct _kernel_share {
 	int ref_count;
-	VMETA_LOCK_FLAG lock_flag;
+	enum _VMETA_LOCK_FLAG lock_flag;
 	int active_user_id;
-	id_instance user_id_list[MAX_VMETA_INSTANCE];
-}kernel_share;
+	struct _id_instance user_id_list[MAX_VMETA_INSTANCE];
+};
+
+#ifndef __KERNEL__
+/*
+ * Needed for userspace
+ */
+typedef enum _VMETA_LOCK_FLAG VMETA_LOCK_FLAG;
+typedef struct _id_instance id_instance;
+typedef struct _kernel_share kernel_share;
+#endif
 
 struct vmeta_lock {
 	unsigned long timeout;
 	unsigned int user_id;
 };
 
-#define IOP_MAGIC	'v'
+struct vmeta_info {
+	uint32_t	revision;
+	struct {
+		uint32_t	phys;
+		uint32_t	size;
+	} map[3];
+};
+
+#define VMETA_STATUS_BIT_USED		0
+#define VMETA_STATUS_BIT_REGISTED	1
+#define VMETA_STATUS_USED		BIT(0)
+#define VMETA_STATUS_REGISTERED		BIT(1)
+
+#define IOP_MAGIC	('v')
 
 #define VMETA_CMD_POWER_ON		_IO(IOP_MAGIC, 0)
 #define VMETA_CMD_POWER_OFF		_IO(IOP_MAGIC, 1)
@@ -65,5 +86,6 @@ struct vmeta_lock {
 #define VMETA_CMD_UNLOCK_USER_ID	_IO(IOP_MAGIC, 18)
 #define VMETA_CMD_FORCE_INI		_IO(IOP_MAGIC, 19)
 #define VMETA_CMD_GET_USER_NUM		_IOR(IOP_MAGIC, 20, unsigned)
+#define VMETA_CMD_GET_INFO		_IOR(IOP_MAGIC, 21, struct vmeta_info)
 
 #endif /* __UIO_VMETA_H */