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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/include/media/drv-intf/tea575x.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */

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#ifndef __SOUND_TEA575X_TUNER_H

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#define __SOUND_TEA575X_TUNER_H

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/*

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 *   ALSA driver for TEA5757/5759 Philips AM/FM tuner chips

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 *

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 *	Copyright (c) 2004 Jaroslav Kysela <[email protected]>

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 */

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#include <linux/videodev2.h>

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#include <media/v4l2-ctrls.h>

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#include <media/v4l2-dev.h>

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#include <media/v4l2-device.h>

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#define TEA575X_FMIF	10700

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#define TEA575X_AMIF	  450

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#define TEA575X_DATA	(1 << 0)

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#define TEA575X_CLK	(1 << 1)

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#define TEA575X_WREN	(1 << 2)

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#define TEA575X_MOST	(1 << 3)

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struct snd_tea575x;

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struct snd_tea575x_ops {

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	/* Drivers using snd_tea575x must either define read_ and write_val */

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	void (*write_val)(struct snd_tea575x *tea, u32 val);

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	u32 (*read_val)(struct snd_tea575x *tea);

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	/* Or define the 3 pin functions */

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	void (*set_pins)(struct snd_tea575x *tea, u8 pins);

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	u8 (*get_pins)(struct snd_tea575x *tea);

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	void (*set_direction)(struct snd_tea575x *tea, bool output);

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};

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struct snd_tea575x {

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	struct v4l2_device *v4l2_dev;

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	struct v4l2_file_operations fops;

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	struct video_device vd;		/* video device */

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	int radio_nr;			/* radio_nr */

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	bool tea5759;			/* 5759 chip is present */

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	bool has_am;			/* Device can tune to AM freqs */

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	bool cannot_read_data;		/* Device cannot read the data pin */

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	bool cannot_mute;		/* Device cannot mute */

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	bool mute;			/* Device is muted? */

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	bool stereo;			/* receiving stereo */

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	bool tuned;			/* tuned to a station */

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	unsigned int val;		/* hw value */

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	u32 band;			/* 0: FM, 1: FM-Japan, 2: AM */

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	u32 freq;			/* frequency */

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	struct mutex mutex;

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	const struct snd_tea575x_ops *ops;

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	void *private_data;

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	u8 card[32];

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	u8 bus_info[32];

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	struct v4l2_ctrl_handler ctrl_handler;

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	int (*ext_init)(struct snd_tea575x *tea);

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};

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int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea,

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					struct v4l2_frequency_band *band);

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int snd_tea575x_g_tuner(struct snd_tea575x *tea, struct v4l2_tuner *v);

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int snd_tea575x_s_hw_freq_seek(struct file *file, struct snd_tea575x *tea,

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				const struct v4l2_hw_freq_seek *a);

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int snd_tea575x_hw_init(struct snd_tea575x *tea);

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int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner);

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void snd_tea575x_exit(struct snd_tea575x *tea);

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void snd_tea575x_set_freq(struct snd_tea575x *tea);

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#endif /* __SOUND_TEA575X_TUNER_H */

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