V4L/DVB (11061): au8522: move shared state and common functions into a separate header files

Move the au8522 state structure, as well as exposing functions needed by the
analog side of the demodulator into a common header file.

Thanks to Michael Krufky <mkrufky@linuxtv.org> and Steven Toth
<stoth@linuxtv.org> for providing sample hardware, engineering level support,
and testing.

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/au8522_dig.c

@@ -27,22 +27,7 @@
 #include <linux/delay.h>
 #include "dvb_frontend.h"
 #include "au8522.h"
-
-struct au8522_state {
-
-	struct i2c_adapter *i2c;
-
-	/* configuration settings */
-	const struct au8522_config *config;
-
-	struct dvb_frontend frontend;
-
-	u32 current_frequency;
-	fe_modulation_t current_modulation;
-
-	u32 fe_status;
-	unsigned int led_state;
-};
+#include "au8522_priv.h"
 
 static int debug;
 
@@ -52,7 +37,7 @@ static int debug;
 	} while (0)
 
 /* 16 bit registers, 8 bit values */
-static int au8522_writereg(struct au8522_state *state, u16 reg, u8 data)
+int au8522_writereg(struct au8522_state *state, u16 reg, u8 data)
 {
 	int ret;
 	u8 buf [] = { reg >> 8, reg & 0xff, data };
@@ -69,7 +54,7 @@ static int au8522_writereg(struct au8522_state *state, u16 reg, u8 data)
 	return (ret != 1) ? -1 : 0;
 }
 
-static u8 au8522_readreg(struct au8522_state *state, u16 reg)
+u8 au8522_readreg(struct au8522_state *state, u16 reg)
 {
 	int ret;
 	u8 b0 [] = { reg >> 8, reg & 0xff };
@@ -528,7 +513,7 @@ static int au8522_set_frontend(struct dvb_frontend *fe,
 
 /* Reset the demod hardware and reset all of the configuration registers
    to a default state. */
-static int au8522_init(struct dvb_frontend *fe)
+int au8522_init(struct dvb_frontend *fe)
 {
 	struct au8522_state *state = fe->demodulator_priv;
 	dprintk("%s()\n", __func__);
@@ -624,7 +609,7 @@ static int au8522_led_ctrl(struct au8522_state *state, int led)
 	return 0;
 }
 
-static int au8522_sleep(struct dvb_frontend *fe)
+int au8522_sleep(struct dvb_frontend *fe)
 {
 	struct au8522_state *state = fe->demodulator_priv;
 	dprintk("%s()\n", __func__);

drivers/media/dvb/frontends/au8522_priv.h

@@ -0,0 +1,57 @@
+/*
+    Auvitek AU8522 QAM/8VSB demodulator driver
+
+    Copyright (C) 2008 Steven Toth <stoth@linuxtv.org>
+    Copyright (C) 2008 Devin Heitmueller <dheitmueller@linuxtv.org>
+    Copyright (C) 2005-2008 Auvitek International, Ltd.
+
+    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.
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <linux/i2c.h>
+#include "dvb_frontend.h"
+#include "au8522.h"
+#include "tuner-i2c.h"
+
+struct au8522_state {
+	struct i2c_adapter *i2c;
+
+	/* configuration settings */
+	const struct au8522_config *config;
+
+	struct dvb_frontend frontend;
+
+	u32 current_frequency;
+	fe_modulation_t current_modulation;
+
+	u32 fe_status;
+	unsigned int led_state;
+};
+
+/* These are routines shared by both the VSB/QAM demodulator and the analog
+   decoder */
+int au8522_writereg(struct au8522_state *state, u16 reg, u8 data);
+u8 au8522_readreg(struct au8522_state *state, u16 reg);
+int au8522_init(struct dvb_frontend *fe);
+int au8522_sleep(struct dvb_frontend *fe);