1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef __SOUND_TEA575X_TUNER_H
3#define __SOUND_TEA575X_TUNER_H
4
5/*
6 * ALSA driver for TEA5757/5759 Philips AM/FM tuner chips
7 *
8 * Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
9 */
10
11#include <linux/videodev2.h>
12#include <media/v4l2-ctrls.h>
13#include <media/v4l2-dev.h>
14#include <media/v4l2-device.h>
15
16#define TEA575X_FMIF 10700
17#define TEA575X_AMIF 450
18
19#define TEA575X_DATA (1 << 0)
20#define TEA575X_CLK (1 << 1)
21#define TEA575X_WREN (1 << 2)
22#define TEA575X_MOST (1 << 3)
23
24struct snd_tea575x;
25
26struct snd_tea575x_ops {
27 /* Drivers using snd_tea575x must either define read_ and write_val */
28 void (*write_val)(struct snd_tea575x *tea, u32 val);
29 u32 (*read_val)(struct snd_tea575x *tea);
30 /* Or define the 3 pin functions */
31 void (*set_pins)(struct snd_tea575x *tea, u8 pins);
32 u8 (*get_pins)(struct snd_tea575x *tea);
33 void (*set_direction)(struct snd_tea575x *tea, bool output);
34};
35
36struct snd_tea575x {
37 struct v4l2_device *v4l2_dev;
38 struct v4l2_file_operations fops;
39 struct video_device vd; /* video device */
40 int radio_nr; /* radio_nr */
41 bool tea5759; /* 5759 chip is present */
42 bool has_am; /* Device can tune to AM freqs */
43 bool cannot_read_data; /* Device cannot read the data pin */
44 bool cannot_mute; /* Device cannot mute */
45 bool mute; /* Device is muted? */
46 bool stereo; /* receiving stereo */
47 bool tuned; /* tuned to a station */
48 unsigned int val; /* hw value */
49 u32 band; /* 0: FM, 1: FM-Japan, 2: AM */
50 u32 freq; /* frequency */
51 struct mutex mutex;
52 const struct snd_tea575x_ops *ops;
53 void *private_data;
54 u8 card[32];
55 u8 bus_info[32];
56 struct v4l2_ctrl_handler ctrl_handler;
57 int (*ext_init)(struct snd_tea575x *tea);
58};
59
60int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea,
61 struct v4l2_frequency_band *band);
62int snd_tea575x_g_tuner(struct snd_tea575x *tea, struct v4l2_tuner *v);
63int snd_tea575x_s_hw_freq_seek(struct file *file, struct snd_tea575x *tea,
64 const struct v4l2_hw_freq_seek *a);
65int snd_tea575x_hw_init(struct snd_tea575x *tea);
66int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner);
67void snd_tea575x_exit(struct snd_tea575x *tea);
68void snd_tea575x_set_freq(struct snd_tea575x *tea);
69
70#endif /* __SOUND_TEA575X_TUNER_H */
71

source code of linux/include/media/drv-intf/tea575x.h