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
  34 struct radio_tea5777;
  35
  36 struct 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
  60 struct 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
  82 int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner);
  83 void radio_tea5777_exit(struct radio_tea5777 *tea);
  84 int radio_tea5777_set_freq(struct radio_tea5777 *tea);
  85
  86 #endif /* __RADIO_TEA5777_H */