include/media/tuner-types.h

   1 /*
   2  * descriptions for simple tuners.
   3  */
   4
   5 #ifndef __TUNER_TYPES_H__
   6 #define __TUNER_TYPES_H__
   7
   8 enum param_type {
   9         TUNER_PARAM_TYPE_RADIO, \
  10         TUNER_PARAM_TYPE_PAL, \
  11         TUNER_PARAM_TYPE_SECAM, \
  12         TUNER_PARAM_TYPE_NTSC
  13 };
  14
  15 struct tuner_range {
  16         unsigned short limit;
  17         unsigned char config;
  18         unsigned char cb;
  19 };
  20
  21 struct tuner_params {
  22         enum param_type type;
  23
  24         /* Many Philips based tuners have a comment like this in their
  25          * datasheet:
  26          *
  27          *   For channel selection involving band switching, and to ensure
  28          *   smooth tuning to the desired channel without causing
  29          *   unnecessary charge pump action, it is recommended to consider
  30          *   the difference between wanted channel frequency and the
  31          *   current channel frequency.  Unnecessary charge pump action
  32          *   will result in very low tuning voltage which may drive the
  33          *   oscillator to extreme conditions.
  34          *
  35          * Set cb_first_if_lower_freq to 1, if this check is
  36          * required for this tuner.
  37          *
  38          * I tested this for PAL by first setting the TV frequency to
  39          * 203 MHz and then switching to 96.6 MHz FM radio. The result was
  40          * static unless the control byte was sent first.
  41          */
  42         unsigned int cb_first_if_lower_freq:1;
  43         /* Set to 1 if this tuner uses a tda9887 */
  44         unsigned int has_tda9887:1;
  45         /* Many Philips tuners use tda9887 PORT1 to select the FM radio
  46            sensitivity. If this setting is 1, then set PORT1 to 1 to
  47            get proper FM reception. */
  48         unsigned int port1_fm_high_sensitivity:1;
  49         /* Some Philips tuners use tda9887 PORT2 to select the FM radio
  50            sensitivity. If this setting is 1, then set PORT2 to 1 to
  51            get proper FM reception. */
  52         unsigned int port2_fm_high_sensitivity:1;
  53         /* Most tuners with a tda9887 use QSS mode. Some (cheaper) tuners
  54            use Intercarrier mode. If this setting is 1, then the tuner
  55            needs to be set to intercarrier mode. */
  56         unsigned int intercarrier_mode:1;
  57         /* This setting sets the default value for PORT1.
  58            0 means inactive, 1 means active. Note: the actual bit
  59            value written to the tda9887 is inverted. So a 0 here
  60            means a 1 in the B6 bit. */
  61         unsigned int port1_active:1;
  62         /* This setting sets the default value for PORT2.
  63            0 means inactive, 1 means active. Note: the actual bit
  64            value written to the tda9887 is inverted. So a 0 here
  65            means a 1 in the B7 bit. */
  66         unsigned int port2_active:1;
  67         /* Sometimes PORT1 is inverted when the SECAM-L' standard is selected.
  68            Set this bit to 1 if this is needed. */
  69         unsigned int port1_invert_for_secam_lc:1;
  70         /* Sometimes PORT2 is inverted when the SECAM-L' standard is selected.
  71            Set this bit to 1 if this is needed. */
  72         unsigned int port2_invert_for_secam_lc:1;
  73         /* Some cards require PORT1 to be 1 for mono Radio FM and 0 for stereo. */
  74         unsigned int port1_set_for_fm_mono:1;
  75         /* Default tda9887 TOP value in dB for the low band. Default is 0.
  76            Range: -16:+15 */
  77         signed int default_top_low:5;
  78         /* Default tda9887 TOP value in dB for the mid band. Default is 0.
  79            Range: -16:+15 */
  80         signed int default_top_mid:5;
  81         /* Default tda9887 TOP value in dB for the high band. Default is 0.
  82            Range: -16:+15 */
  83         signed int default_top_high:5;
  84         /* Default tda9887 TOP value in dB for SECAM-L/L' for the low band.
  85            Default is 0. Several tuners require a different TOP value for
  86            the SECAM-L/L' standards. Range: -16:+15 */
  87         signed int default_top_secam_low:5;
  88         /* Default tda9887 TOP value in dB for SECAM-L/L' for the mid band.
  89            Default is 0. Several tuners require a different TOP value for
  90            the SECAM-L/L' standards. Range: -16:+15 */
  91         signed int default_top_secam_mid:5;
  92         /* Default tda9887 TOP value in dB for SECAM-L/L' for the high band.
  93            Default is 0. Several tuners require a different TOP value for
  94            the SECAM-L/L' standards. Range: -16:+15 */
  95         signed int default_top_secam_high:5;
  96
  97
  98         unsigned int count;
  99         struct tuner_range *ranges;
 100 };
 101
 102 struct tunertype {
 103         char *name;
 104         unsigned int count;
 105         struct tuner_params *params;
 106 };
 107
 108 extern struct tunertype tuners[];
 109 extern unsigned const int tuner_count;
 110
 111 #endif