From d18159cf62ac20b9b5ec6027b2da10dc25c1be11 Mon Sep 17 00:00:00 2001
From: Hoernchen <la@tfc-server.de>
Date: Sun, 26 May 2013 22:43:50 +0200
Subject: [PATCH] libhackrf: gain control

---
 host/libhackrf/src/hackrf.c | 89 ++++++++++++++++++++++++++++++++++++-
 host/libhackrf/src/hackrf.h |  4 ++
 2 files changed, 92 insertions(+), 1 deletion(-)

diff --git a/host/libhackrf/src/hackrf.c b/host/libhackrf/src/hackrf.c
index c520e63e..dc506525 100644
--- a/host/libhackrf/src/hackrf.c
+++ b/host/libhackrf/src/hackrf.c
@@ -48,7 +48,10 @@ typedef enum {
 	HACKRF_VENDOR_REQUEST_VERSION_STRING_READ = 15,
 	HACKRF_VENDOR_REQUEST_SET_FREQ = 16,
 	HACKRF_VENDOR_REQUEST_AMP_ENABLE = 17,
-	HACKRF_VENDOR_REQUEST_BOARD_PARTID_SERIALNO_READ = 18
+	HACKRF_VENDOR_REQUEST_BOARD_PARTID_SERIALNO_READ = 18,
+	HACKRF_VENDOR_REQUEST_SET_LNA_GAIN = 19,
+	HACKRF_VENDOR_REQUEST_SET_VGA_GAIN = 20,
+	HACKRF_VENDOR_REQUEST_SET_TXVGA_GAIN = 21,
 } hackrf_vendor_request;
 
 typedef enum {
@@ -789,6 +792,90 @@ int ADDCALL hackrf_board_partid_serialno_read(hackrf_device* device, read_partid
 	}
 }
 
+int ADDCALL hackrf_set_lna_gain(hackrf_device* device, uint32_t value)
+{
+	int result;
+	
+	if( value > 40 )
+	{
+		return HACKRF_ERROR_INVALID_PARAM;
+	}
+
+	result = libusb_control_transfer(
+		device->usb_device,
+		LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE,
+		HACKRF_VENDOR_REQUEST_SET_LNA_GAIN,
+		0,
+		value,
+		NULL,
+		0,
+		0
+	);
+
+	if( result != 0 )
+	{
+		return HACKRF_ERROR_INVALID_PARAM;
+	} else {
+		return HACKRF_SUCCESS;
+	}
+}
+
+int ADDCALL hackrf_set_vga_gain(hackrf_device* device, uint32_t value)
+{
+	int result;
+	
+	if( value > 62 )
+	{
+		return HACKRF_ERROR_INVALID_PARAM;
+	}
+
+	result = libusb_control_transfer(
+		device->usb_device,
+		LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE,
+		HACKRF_VENDOR_REQUEST_SET_VGA_GAIN,
+		0,
+		value,
+		NULL,
+		0,
+		0
+	);
+
+	if( result != 0 )
+	{
+		return HACKRF_ERROR_INVALID_PARAM;
+	} else {
+		return HACKRF_SUCCESS;
+	}
+}
+
+int ADDCALL hackrf_set_txvga_gain(hackrf_device* device, uint32_t value, uint32_t plus16db)
+{
+	int result;
+	
+	if( value > 47 )
+	{
+		return HACKRF_ERROR_INVALID_PARAM;
+	}
+
+	result = libusb_control_transfer(
+		device->usb_device,
+		LIBUSB_ENDPOINT_OUT | LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE,
+		HACKRF_VENDOR_REQUEST_SET_TXVGA_GAIN,
+		plus16db,
+		value,
+		NULL,
+		0,
+		0
+	);
+
+	if( result != 0 )
+	{
+		return HACKRF_ERROR_INVALID_PARAM;
+	} else {
+		return HACKRF_SUCCESS;
+	}
+}
+
 static void* transfer_threadproc(void* arg)
 {
 	hackrf_device* device = (hackrf_device*)arg;
diff --git a/host/libhackrf/src/hackrf.h b/host/libhackrf/src/hackrf.h
index f5e9a77b..bc1b5e60 100644
--- a/host/libhackrf/src/hackrf.h
+++ b/host/libhackrf/src/hackrf.h
@@ -134,6 +134,10 @@ extern ADDAPI int ADDCALL hackrf_set_amp_enable(hackrf_device* device, const uin
 
 extern ADDAPI int ADDCALL hackrf_board_partid_serialno_read(hackrf_device* device, read_partid_serialno_t* read_partid_serialno);
 
+extern ADDAPI int ADDCALL hackrf_set_lna_gain(hackrf_device* device, uint32_t value);
+extern ADDAPI int ADDCALL hackrf_set_vga_gain(hackrf_device* device, uint32_t value);
+extern ADDAPI int ADDCALL hackrf_set_txvga_gain(hackrf_device* device, uint32_t value, uint32_t plus16db);
+
 extern ADDAPI const char* ADDCALL hackrf_error_name(enum hackrf_error errcode);
 extern ADDAPI const char* ADDCALL hackrf_board_id_name(enum hackrf_board_id board_id);