xref: /openbmc/linux/drivers/media/tuners/xc4000.h (revision e23feb16)
1 /*
2  *  Driver for Xceive XC4000 "QAM/8VSB single chip tuner"
3  *
4  *  Copyright (c) 2007 Steven Toth <stoth@linuxtv.org>
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *
15  *  GNU General Public License for more details.
16  *
17  *  You should have received a copy of the GNU General Public License
18  *  along with this program; if not, write to the Free Software
19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  */
21 
22 #ifndef __XC4000_H__
23 #define __XC4000_H__
24 
25 #include <linux/firmware.h>
26 
27 struct dvb_frontend;
28 struct i2c_adapter;
29 
30 struct xc4000_config {
31 	u8	i2c_address;
32 	/* if non-zero, power management is enabled by default */
33 	u8	default_pm;
34 	/* value to be written to XREG_AMPLITUDE in DVB-T mode (0: no write) */
35 	u8	dvb_amplitude;
36 	/* if non-zero, register 0x0E is set to filter analog TV video output */
37 	u8	set_smoothedcvbs;
38 	/* IF for DVB-T */
39 	u32	if_khz;
40 };
41 
42 /* xc4000 callback command */
43 #define XC4000_TUNER_RESET		0
44 
45 /* For each bridge framework, when it attaches either analog or digital,
46  * it has to store a reference back to its _core equivalent structure,
47  * so that it can service the hardware by steering gpio's etc.
48  * Each bridge implementation is different so cast devptr accordingly.
49  * The xc4000 driver cares not for this value, other than ensuring
50  * it's passed back to a bridge during tuner_callback().
51  */
52 
53 #if IS_ENABLED(CONFIG_MEDIA_TUNER_XC4000)
54 extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
55 					  struct i2c_adapter *i2c,
56 					  struct xc4000_config *cfg);
57 #else
58 static inline struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
59 						 struct i2c_adapter *i2c,
60 						 struct xc4000_config *cfg)
61 {
62 	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
63 	return NULL;
64 }
65 #endif
66 
67 #endif
68