1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  *  Driver for Xceive XC4000 "QAM/8VSB single chip tuner"
4  *
5  *  Copyright (c) 2007 Steven Toth <stoth@linuxtv.org>
6  */
7 
8 #ifndef __XC4000_H__
9 #define __XC4000_H__
10 
11 #include <linux/firmware.h>
12 
13 struct dvb_frontend;
14 struct i2c_adapter;
15 
16 struct xc4000_config {
17 	u8	i2c_address;
18 	/* if non-zero, power management is enabled by default */
19 	u8	default_pm;
20 	/* value to be written to XREG_AMPLITUDE in DVB-T mode (0: no write) */
21 	u8	dvb_amplitude;
22 	/* if non-zero, register 0x0E is set to filter analog TV video output */
23 	u8	set_smoothedcvbs;
24 	/* IF for DVB-T */
25 	u32	if_khz;
26 };
27 
28 /* xc4000 callback command */
29 #define XC4000_TUNER_RESET		0
30 
31 /* For each bridge framework, when it attaches either analog or digital,
32  * it has to store a reference back to its _core equivalent structure,
33  * so that it can service the hardware by steering gpio's etc.
34  * Each bridge implementation is different so cast devptr accordingly.
35  * The xc4000 driver cares not for this value, other than ensuring
36  * it's passed back to a bridge during tuner_callback().
37  */
38 
39 #if IS_REACHABLE(CONFIG_MEDIA_TUNER_XC4000)
40 extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
41 					  struct i2c_adapter *i2c,
42 					  struct xc4000_config *cfg);
43 #else
xc4000_attach(struct dvb_frontend * fe,struct i2c_adapter * i2c,struct xc4000_config * cfg)44 static inline struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
45 						 struct i2c_adapter *i2c,
46 						 struct xc4000_config *cfg)
47 {
48 	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
49 	return NULL;
50 }
51 #endif
52 
53 #endif
54