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
13struct dvb_frontend;
14struct i2c_adapter;
15
16struct 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)
40extern struct dvb_frontend *xc4000_attach(struct dvb_frontend *fe,
41					  struct i2c_adapter *i2c,
42					  struct xc4000_config *cfg);
43#else
44static 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