xref: /openbmc/linux/include/media/drv-intf/tea575x.h (revision c942fddf)
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 
24 struct snd_tea575x;
25 
26 struct 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 
36 struct 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 
60 int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea,
61 					struct v4l2_frequency_band *band);
62 int snd_tea575x_g_tuner(struct snd_tea575x *tea, struct v4l2_tuner *v);
63 int snd_tea575x_s_hw_freq_seek(struct file *file, struct snd_tea575x *tea,
64 				const struct v4l2_hw_freq_seek *a);
65 int snd_tea575x_hw_init(struct snd_tea575x *tea);
66 int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner);
67 void snd_tea575x_exit(struct snd_tea575x *tea);
68 void snd_tea575x_set_freq(struct snd_tea575x *tea);
69 
70 #endif /* __SOUND_TEA575X_TUNER_H */
71