LXR linux/drivers/media/radio/radio-tea5777.h

   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
  24struct radio_tea5777;
  25
  26struct 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
  50struct 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
  72int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner);
  73void radio_tea5777_exit(struct radio_tea5777 *tea);
  74int radio_tea5777_set_freq(struct radio_tea5777 *tea);
  75
  76#endif /* __RADIO_TEA5777_H */
  77