drx: add initial drx-d driver

These are the original drx-d sources, extracted from Ralph Metzler's GPL'd
ngene driver.  No modifications/cleanup have yet been made.  In fact, no
measures have been taken to see if the code even compiles.

Signed-off-by Ralph Metzler <rjkm@metzlerbros.de>
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/drxd.h

@@ -0,0 +1,57 @@
+/*
+ * drxd.h: DRXD DVB-T demodulator driver
+ *
+ * Copyright (C) 2005-2007 Micronas
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 only, as published by the Free Software Foundation.
+ *
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef _DRXD_H_
+#define _DRXD_H_
+
+#include <linux/types.h>
+#include <linux/i2c.h>
+
+struct drxd_config
+{
+	u8 index;
+
+	u8 pll_address;
+	u8 pll_type;
+#define DRXD_PLL_NONE     0
+#define DRXD_PLL_DTT7520X 1
+#define DRXD_PLL_MT3X0823 2
+
+	u32 clock;
+
+	u8 demod_address;
+	u8 demoda_address;
+	u8 demod_revision;
+
+	u32 IF;
+	int (*pll_set)       (void *priv, void *priv_params,
+			      u8 pll_addr, u8 demoda_addr, s32 *off);
+	s16 (*osc_deviation) (void *priv, s16 dev, int flag);
+};
+
+extern
+struct dvb_frontend *drxd_attach(const struct drxd_config *config,
+				 void *priv, struct i2c_adapter *i2c,
+				 struct device *dev);
+extern int drxd_config_i2c(struct dvb_frontend *, int);
+#endif