V4L/DVB (10801): Add headers for ST STV0900 dual demodulator.

The IC consist of two dependent parts.
It may use single or dual mode.
Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/stv0900.h

+/*
+ * stv0900.h
+ *
+ * Driver for ST STV0900 satellite demodulator IC.
+ *
+ * Copyright (C) ST Microelectronics.
+ * Copyright (C) 2009 NetUP Inc.
+ * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef STV0900_H
+#define STV0900_H
+
+#include <linux/dvb/frontend.h>
+#include "dvb_frontend.h"
+
+struct stv0900_config {
+	u8 demod_address;
+	u32 xtal;
+	u8 clkmode;/* 0 for CLKI,  2 for XTALI */
+
+	u8 diseqc_mode;
+
+	u8 path1_mode;
+	u8 path2_mode;
+
+	u8 tun1_maddress;/* 0, 1, 2, 3 for 0xc0, 0xc2, 0xc4, 0xc6 */
+	u8 tun2_maddress;
+	u8 tun1_adc;/* 1 for stv6110, 2 for stb6100 */
+	u8 tun2_adc;
+};
+
+#if defined(CONFIG_DVB_STV0900) || (defined(CONFIG_DVB_STV0900_MODULE) \
+							&& defined(MODULE))
+extern struct dvb_frontend *stv0900_attach(const struct stv0900_config *config,
+					struct i2c_adapter *i2c, int demod);
+#else
+static inline struct dvb_frontend *stv0900_attach(const struct stv0900_config *config,
+					struct i2c_adapter *i2c, int demod)
+{
+	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+	return NULL;
+}
+#endif
+
+#endif
+