[media] Add support Sony HELENE Sat/Ter Tuner

This is Sony HELENE DVB-S/S2 DVB-T/T2 DVB-C/C2 ISDB-T/S tuner
driver (CXD2858ER).

Tuner is used on NetUP Dual Universal DVB CI card (hardware revision 1.4).
Use 'helene_attach_s' to attach tuner in 'satellite mode'.
Use 'helene_attach' for 'terrestrial mode'.

Satellite delivery systems supported:
 DVB-S/S2, ISDB-S

Terrestrial delivery systems supported:
 DVB-T/T2, ISDB-T

Cable delivery systems supported:
 DVB-C/C2
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/Kconfig

@@ -853,6 +853,13 @@ config DVB_ASCOT2E
 	help
 	  Say Y when you want to support this frontend.
 
+config DVB_HELENE
+	tristate "Sony HELENE Sat/Ter tuner (CXD2858ER)"
+	depends on DVB_CORE && I2C
+	default m if !MEDIA_SUBDRV_AUTOSELECT
+	help
+	Say Y when you want to support this frontend.
+
 comment "Tools to develop new frontends"
 
 config DVB_DUMMY_FE

drivers/media/dvb-frontends/Makefile

@@ -123,3 +123,4 @@ obj-$(CONFIG_DVB_AS102_FE) += as102_fe.o
 obj-$(CONFIG_DVB_TC90522) += tc90522.o
 obj-$(CONFIG_DVB_HORUS3A) += horus3a.o
 obj-$(CONFIG_DVB_ASCOT2E) += ascot2e.o
+obj-$(CONFIG_DVB_HELENE) += helene.o

drivers/media/dvb-frontends/helene.h

+/*
+ * helene.h
+ *
+ * Sony HELENE DVB-S/S2/T/T2/C/C2/ISDB-T/S tuner driver (CXD2858ER)
+ *
+ * Copyright 2012 Sony Corporation
+ * Copyright (C) 2014 NetUP Inc.
+ * Copyright (C) 2014 Abylay Ospan <aospan@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.
+  */
+
+#ifndef __DVB_HELENE_H__
+#define __DVB_HELENE_H__
+
+#include <linux/kconfig.h>
+#include <linux/dvb/frontend.h>
+#include <linux/i2c.h>
+
+enum helene_xtal {
+	SONY_HELENE_XTAL_16000, /* 16 MHz */
+	SONY_HELENE_XTAL_20500, /* 20.5 MHz */
+	SONY_HELENE_XTAL_24000, /* 24 MHz */
+	SONY_HELENE_XTAL_41000 /* 41 MHz */
+};
+
+/**
+ * struct helene_config - the configuration of 'Helene' tuner driver
+ * @i2c_address:	I2C address of the tuner
+ * @xtal_freq_mhz:	Oscillator frequency, MHz
+ * @set_tuner_priv:	Callback function private context
+ * @set_tuner_callback:	Callback function that notifies the parent driver
+ *			which tuner is active now
+ */
+struct helene_config {
+	u8	i2c_address;
+	u8	xtal_freq_mhz;
+	void	*set_tuner_priv;
+	int	(*set_tuner_callback)(void *, int);
+	enum helene_xtal xtal;
+};
+
+#if IS_REACHABLE(CONFIG_DVB_HELENE)
+extern struct dvb_frontend *helene_attach(struct dvb_frontend *fe,
+					const struct helene_config *config,
+					struct i2c_adapter *i2c);
+#else
+static inline struct dvb_frontend *helene_attach(struct dvb_frontend *fe,
+					const struct helene_config *config,
+					struct i2c_adapter *i2c)
+{
+	pr_warn("%s: driver disabled by Kconfig\n", __func__);
+	return NULL;
+}
+#endif
+
+#if IS_REACHABLE(CONFIG_DVB_HELENE)
+extern struct dvb_frontend *helene_attach_s(struct dvb_frontend *fe,
+					const struct helene_config *config,
+					struct i2c_adapter *i2c);
+#else
+static inline struct dvb_frontend *helene_attach_s(struct dvb_frontend *fe,
+					const struct helene_config *config,
+					struct i2c_adapter *i2c)
+{
+	pr_warn("%s: driver disabled by Kconfig\n", __func__);
+	return NULL;
+}
+#endif
+
+#endif

drivers/media/pci/netup_unidvb/Kconfig

@@ -5,8 +5,13 @@ config DVB_NETUP_UNIDVB
     select VIDEOBUF2_VMALLOC
 	select DVB_HORUS3A if MEDIA_SUBDRV_AUTOSELECT
 	select DVB_ASCOT2E if MEDIA_SUBDRV_AUTOSELECT
+	select DVB_HELENE if MEDIA_SUBDRV_AUTOSELECT
 	select DVB_LNBH25 if MEDIA_SUBDRV_AUTOSELECT
 	select DVB_CXD2841ER if MEDIA_SUBDRV_AUTOSELECT
 	---help---
 	  Support for NetUP PCI express Universal DVB card.
-
+     help
+	Say Y when you want to support NetUP Dual Universal DVB card
+	Card can receive two independent streams in following standards:
+		DVB-S/S2, T/T2, C/C2
+	Two CI slots available for CAM modules.