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

   1#ifndef __RADIO_TEA5777_H
   2#define __RADIO_TEA5777_H
   3
   4/*
   5 *   v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
   6 *
   7 *      Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
   8 *
   9 *   Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips:
  10 *
  11 *      Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
  12 *      Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
  13 *
  14 *   This program is free software; you can redistribute it and/or modify
  15 *   it under the terms of the GNU General Public License as published by
  16 *   the Free Software Foundation; either version 2 of the License, or
  17 *   (at your option) any later version.
  18 *
  19 *   This program is distributed in the hope that it will be useful,
  20 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 *   GNU General Public License for more details.
  23 *
  24 */
  25
  26#include <linux/videodev2.h>
  27#include <media/v4l2-ctrls.h>
  28#include <media/v4l2-dev.h>
  29#include <media/v4l2-device.h>
  30
  31#define TEA575X_FMIF    10700
  32#define TEA575X_AMIF      450
  33
  34struct radio_tea5777;
  35
  36struct radio_tea5777_ops {
  37        /*
  38         * Write the 6 bytes large write register of the tea5777
  39         *
  40         * val represents the 6 write registers, with byte 1 from the
  41         * datasheet being the most significant byte (so byte 5 of the u64),
  42         * and byte 6 from the datasheet being the least significant byte.
  43         *
  44         * returns 0 on success.
  45         */
  46        int (*write_reg)(struct radio_tea5777 *tea, u64 val);
  47        /*
  48         * Read the 3 bytes large read register of the tea5777
  49         *
  50         * The read value gets returned in val, akin to write_reg, byte 1 from
  51         * the datasheet is stored as the most significant byte (so byte 2 of
  52         * the u32), and byte 3 from the datasheet gets stored as the least
  53         * significant byte (iow byte 0 of the u32).
  54         *
  55         * returns 0 on success.
  56         */
  57        int (*read_reg)(struct radio_tea5777 *tea, u32 *val);
  58};
  59
  60struct radio_tea5777 {
  61        struct v4l2_device *v4l2_dev;
  62        struct v4l2_file_operations fops;
  63        struct video_device vd;         /* video device */
  64        bool has_am;                    /* Device can tune to AM freqs */
  65        bool write_before_read;         /* must write before read quirk */
  66        bool needs_write;               /* for write before read quirk */
  67        u32 band;                       /* current band */
  68        u32 freq;                       /* current frequency */
  69        u32 audmode;                    /* last set audmode */
  70        u32 seek_rangelow;              /* current hwseek limits */
  71        u32 seek_rangehigh;
  72        u32 read_reg;
  73        u64 write_reg;
  74        struct mutex mutex;
  75        const struct radio_tea5777_ops *ops;
  76        void *private_data;
  77        u8 card[32];
  78        u8 bus_info[32];
  79        struct v4l2_ctrl_handler ctrl_handler;
  80};
  81
  82int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner);
  83void radio_tea5777_exit(struct radio_tea5777 *tea);
  84int radio_tea5777_set_freq(struct radio_tea5777 *tea);
  85
  86#endif /* __RADIO_TEA5777_H */
  87