V4L/DVB (5948): Adding support for the S5H1409/CX24227 8VSB/QAM demodulator.

This patch adds support for the Samsung S5H1409 demodulator, also known
as the Conexant CX24227 demodulator. 8VSB mode has been tested and QAM
has been implemented based on the spec, although it's untested.

The S5H1409 / CX24227 appears on various Hauppauge boards.
Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/frontends/Kconfig

@@ -283,6 +283,14 @@ config DVB_LGDT330X
 	  An ATSC 8VSB and QAM64/256 tuner module. Say Y when you want
 	  to support this frontend.
 
+config DVB_S5H1409
+	tristate "Samsung S5H1409 based"
+	depends on DVB_CORE && I2C
+	default m if DVB_FE_CUSTOMISE
+	help
+	  An ATSC 8VSB and QAM64/256 tuner module. Say Y when you want
+	  to support this frontend.
+
 comment "Tuners/PLL support"
 	depends on DVB_CORE
 

drivers/media/dvb/frontends/Makefile

@@ -44,3 +44,4 @@ obj-$(CONFIG_DVB_TUNER_MT2266) += mt2266.o
 obj-$(CONFIG_DVB_TUNER_QT1010) += qt1010.o
 obj-$(CONFIG_DVB_TUA6100) += tua6100.o
 obj-$(CONFIG_DVB_TUNER_MT2131) += mt2131.o
+obj-$(CONFIG_DVB_S5H1409) += s5h1409.o

drivers/media/dvb/frontends/s5h1409.h

+/*
+    Samsung S5H1409 VSB/QAM demodulator driver
+
+    Copyright (C) 2006 Steven Toth <stoth@hauppauge.com>
+
+    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 S5H1409_H
+#define S5H1409_H
+
+#include <linux/dvb/frontend.h>
+
+struct s5h1409_config
+{
+	/* the demodulator's i2c address */
+	u8 demod_address;
+
+	/* serial/parallel output */
+#define S5H1409_PARALLEL_OUTPUT 0
+#define S5H1409_SERIAL_OUTPUT   1
+	u8 output_mode;
+
+	/* GPIO Setting */
+#define S5H1409_GPIO_OFF 0
+#define S5H1409_GPIO_ON  1
+	u8 gpio;
+
+	/* IF Freq in KHz */
+	u16 if_freq;
+
+	/* Spectral Inversion */
+#define S5H1409_INVERSION_OFF 0
+#define S5H1409_INVERSION_ON  1
+	u8 inversion;
+
+	/* Return lock status based on tuner lock, or demod lock */
+#define S5H1409_TUNERLOCKING 0
+#define S5H1409_DEMODLOCKING 1
+	u8 status_mode;
+};
+
+#if defined(CONFIG_DVB_S5H1409) || defined(CONFIG_DVB_S5H1409_MODULE)
+extern struct dvb_frontend* s5h1409_attach(const struct s5h1409_config* config,
+					   struct i2c_adapter* i2c);
+#else
+static inline struct dvb_frontend* s5h1409_attach(const struct s5h1409_config* config,
+					   struct i2c_adapter* i2c)
+{
+	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __FUNCTION__);
+	return NULL;
+}
+#endif // CONFIG_DVB_S5H1409
+
+#endif // S5H1409_H