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  *   You should have received a copy of the GNU General Public License
  25  *   along with this program; if not, write to the Free Software
  26  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  27  *
  28  */
  29
  30 #include <linux/videodev2.h>
  31 #include <media/v4l2-ctrls.h>
  32 #include <media/v4l2-dev.h>
  33 #include <media/v4l2-device.h>
  34
  35 #define TEA575X_FMIF    10700
  36 #define TEA575X_AMIF      450
  37
  38 struct radio_tea5777;
  39
  40 struct radio_tea5777_ops {
  41         /*
  42          * Write the 6 bytes large write register of the tea5777
  43          *
  44          * val represents the 6 write registers, with byte 1 from the
  45          * datasheet being the most significant byte (so byte 5 of the u64),
  46          * and byte 6 from the datasheet being the least significant byte.
  47          *
  48          * returns 0 on success.
  49          */
  50         int (*write_reg)(struct radio_tea5777 *tea, u64 val);
  51         /*
  52          * Read the 3 bytes large read register of the tea5777
  53          *
  54          * The read value gets returned in val, akin to write_reg, byte 1 from
  55          * the datasheet is stored as the most significant byte (so byte 2 of
  56          * the u32), and byte 3 from the datasheet gets stored as the least
  57          * significant byte (iow byte 0 of the u32).
  58          *
  59          * returns 0 on success.
  60          */
  61         int (*read_reg)(struct radio_tea5777 *tea, u32 *val);
  62 };
  63
  64 struct radio_tea5777 {
  65         struct v4l2_device *v4l2_dev;
  66         struct v4l2_file_operations fops;
  67         struct video_device vd;         /* video device */
  68         bool has_am;                    /* Device can tune to AM freqs */
  69         bool write_before_read;         /* must write before read quirk */
  70         bool needs_write;               /* for write before read quirk */
  71         u32 band;                       /* current band */
  72         u32 freq;                       /* current frequency */
  73         u32 audmode;                    /* last set audmode */
  74         u32 seek_rangelow;              /* current hwseek limits */
  75         u32 seek_rangehigh;
  76         u32 read_reg;
  77         u64 write_reg;
  78         struct mutex mutex;
  79         const struct radio_tea5777_ops *ops;
  80         void *private_data;
  81         u8 card[32];
  82         u8 bus_info[32];
  83         struct v4l2_ctrl_handler ctrl_handler;
  84 };
  85
  86 int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner);
  87 void radio_tea5777_exit(struct radio_tea5777 *tea);
  88 int radio_tea5777_set_freq(struct radio_tea5777 *tea);
  89
  90 #endif /* __RADIO_TEA5777_H */