1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef __RADIO_TEA5777_H
3 #define __RADIO_TEA5777_H
4 
5 /*
6  *   v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
7  *
8  *	Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
9  *
10  *   Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips:
11  *
12  *	Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
13  *	Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
14  */
15 
16 #include <linux/videodev2.h>
17 #include <media/v4l2-ctrls.h>
18 #include <media/v4l2-dev.h>
19 #include <media/v4l2-device.h>
20 
21 #define TEA575X_FMIF	10700
22 #define TEA575X_AMIF	  450
23 
24 struct radio_tea5777;
25 
26 struct radio_tea5777_ops {
27 	/*
28 	 * Write the 6 bytes large write register of the tea5777
29 	 *
30 	 * val represents the 6 write registers, with byte 1 from the
31 	 * datasheet being the most significant byte (so byte 5 of the u64),
32 	 * and byte 6 from the datasheet being the least significant byte.
33 	 *
34 	 * returns 0 on success.
35 	 */
36 	int (*write_reg)(struct radio_tea5777 *tea, u64 val);
37 	/*
38 	 * Read the 3 bytes large read register of the tea5777
39 	 *
40 	 * The read value gets returned in val, akin to write_reg, byte 1 from
41 	 * the datasheet is stored as the most significant byte (so byte 2 of
42 	 * the u32), and byte 3 from the datasheet gets stored as the least
43 	 * significant byte (iow byte 0 of the u32).
44 	 *
45 	 * returns 0 on success.
46 	 */
47 	int (*read_reg)(struct radio_tea5777 *tea, u32 *val);
48 };
49 
50 struct radio_tea5777 {
51 	struct v4l2_device *v4l2_dev;
52 	struct v4l2_file_operations fops;
53 	struct video_device vd;		/* video device */
54 	bool has_am;			/* Device can tune to AM freqs */
55 	bool write_before_read;		/* must write before read quirk */
56 	bool needs_write;		/* for write before read quirk */
57 	u32 band;			/* current band */
58 	u32 freq;			/* current frequency */
59 	u32 audmode;			/* last set audmode */
60 	u32 seek_rangelow;		/* current hwseek limits */
61 	u32 seek_rangehigh;
62 	u32 read_reg;
63 	u64 write_reg;
64 	struct mutex mutex;
65 	const struct radio_tea5777_ops *ops;
66 	void *private_data;
67 	u8 card[32];
68 	u8 bus_info[32];
69 	struct v4l2_ctrl_handler ctrl_handler;
70 };
71 
72 int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner);
73 void radio_tea5777_exit(struct radio_tea5777 *tea);
74 int radio_tea5777_set_freq(struct radio_tea5777 *tea);
75 
76 #endif /* __RADIO_TEA5777_H */
77