diff --git a/include/ptx_ioctl.h b/include/ptx_ioctl.h
index 2602e56..f9e210e 100644
--- a/include/ptx_ioctl.h
+++ b/include/ptx_ioctl.h
@@ -3,6 +3,23 @@
 #ifndef __PTX_IOCTL_H__
 #define __PTX_IOCTL_H__
 
+#include <linux/types.h>
+
+// common definitions
+
+enum ptx_system_type {
+	PTX_UNSPECIFIED_SYSTEM = 0x00000000,
+	PTX_ISDB_T_SYSTEM = 0x00000010,
+	PTX_ISDB_S_SYSTEM = 0x00000020
+};
+
+enum ptx_stream_type {
+	PTX_UNSPECIFIED_STREAM = 0x00000000,
+	PTX_MPEG_TRANSPORT_STREAM = 0x00000010		// MPEG2-TS
+};
+
+// basic ioctls
+
 struct ptx_freq {
 	int freq_no;
 	int slot;
@@ -14,5 +31,61 @@ struct ptx_freq {
 #define PTX_GET_CNR		_IOR(0x8d, 0x04, int *)
 #define PTX_ENABLE_LNB_POWER	_IOW(0x8d, 0x05, int)
 #define PTX_DISABLE_LNB_POWER	_IO(0x8d, 0x06)
+#define PTX_SET_SYSTEM_MODE	_IOW(0x8d, 0x0b, int)
+
+// extended ioctls
+
+struct ptxt_cap {
+	enum ptx_system_type systems;
+	enum ptx_stream_type streams;
+};
+
+struct ptxt_info {
+	char name[64];
+	struct ptxt_cap cap;			// device capability information
+};
+
+enum ptxt_param_code {
+	PTXT_UNDEFINED_PARAM = 0,
+	PTXT_BANDWIDTH_PARAM = 1,
+	PTXT_STREAM_ID_PARAM = 16
+};
+
+struct ptxt_additional_param {
+	enum ptxt_param_code prop;
+	__u32 data;
+};
+
+struct ptxt_params {
+	enum ptx_system_type system;
+	__u32 freq;				// ISDB-T: Hz, ISDB-S/S3: kHz
+	__u32 num_prop;
+	struct ptxt_additional_param *prop;
+};
+
+enum ptxt_stat_code {
+	PTXT_UNKNOWN_STAT = 0,
+	PTXT_SIGNAL_STRENGTH_STAT,
+	PTXT_CNR_STAT
+};
+
+struct ptxt_stat {
+	enum ptxt_stat_code stat;
+	__u32 value;
+};
+
+struct ptxt_stats {
+	__u32 num_stat;
+	struct ptxt_stat *stat;
+};
+
+#define PTXT_GET_INFO		_IOR(0xe7, 0x00, struct ptxt_info *)
+#define PTXT_GET_PARAMS		_IOR(0xe7, 0x01, struct ptxt_params *)
+#define PTXT_SET_PARAMS		_IOW(0xe7, 0x02, struct ptxt_params *)
+#define PTXT_CLEAR_PARAMS	_IO(0xe7, 0x03)
+#define PTXT_TUNE		_IO(0xe7, 0x04)
+#define PTXT_SET_LNB_VOLTAGE	_IOW(0xe7, 0x05, int)
+#define PTXT_SET_CAPTURE	_IOW(0xe7, 0x06, bool)
+#define PTXT_READ_STATS		_IOR(0xe7, 0x07, struct ptxt_stats *)
 
 #endif