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         /* Some Philips tuners use tda9887 cGainNormal to select the FM radio
  54            sensitivity. If this setting is 1, e register will use cGainNormal
  55            instead of cGainLow. */
  56         unsigned int fm_gain_normal:1;
  57         /* Most tuners with a tda9887 use QSS mode. Some (cheaper) tuners
  58            use Intercarrier mode. If this setting is 1, then the tuner
  59            needs to be set to intercarrier mode. */
  60         unsigned int intercarrier_mode:1;
  61         /* This setting sets the default value for PORT1.
  62            0 means inactive, 1 means active. Note: the actual bit
  63            value written to the tda9887 is inverted. So a 0 here
  64            means a 1 in the B6 bit. */
  65         unsigned int port1_active:1;
  66         /* This setting sets the default value for PORT2.
  67            0 means inactive, 1 means active. Note: the actual bit
  68            value written to the tda9887 is inverted. So a 0 here
  69            means a 1 in the B7 bit. */
  70         unsigned int port2_active:1;
  71         /* Sometimes PORT1 is inverted when the SECAM-L' standard is selected.
  72            Set this bit to 1 if this is needed. */
  73         unsigned int port1_invert_for_secam_lc:1;
  74         /* Sometimes PORT2 is inverted when the SECAM-L' standard is selected.
  75            Set this bit to 1 if this is needed. */
  76         unsigned int port2_invert_for_secam_lc:1;
  77         /* Some cards require PORT1 to be 1 for mono Radio FM and 0 for stereo. */
  78         unsigned int port1_set_for_fm_mono:1;
  79         /* Select 18% (or according to datasheet 0%) L standard PLL gating,
  80            vs the driver default of 36%. */
  81         unsigned int default_pll_gating_18:1;
  82         /* IF to use in radio mode.  Tuners with a separate radio IF filter
  83            seem to use 10.7, while those without use 33.3 for PAL/SECAM tuners
  84            and 41.3 for NTSC tuners. 0 = 10.7, 1 = 33.3, 2 = 41.3 */
  85         unsigned int radio_if:2;
  86         /* Default tda9887 TOP value in dB for the low band. Default is 0.
  87            Range: -16:+15 */
  88         signed int default_top_low:5;
  89         /* Default tda9887 TOP value in dB for the mid band. Default is 0.
  90            Range: -16:+15 */
  91         signed int default_top_mid:5;
  92         /* Default tda9887 TOP value in dB for the high band. Default is 0.
  93            Range: -16:+15 */
  94         signed int default_top_high:5;
  95         /* Default tda9887 TOP value in dB for SECAM-L/L' for the low band.
  96            Default is 0. Several tuners require a different TOP value for
  97            the SECAM-L/L' standards. Range: -16:+15 */
  98         signed int default_top_secam_low:5;
  99         /* Default tda9887 TOP value in dB for SECAM-L/L' for the mid band.
 100            Default is 0. Several tuners require a different TOP value for
 101            the SECAM-L/L' standards. Range: -16:+15 */
 102         signed int default_top_secam_mid:5;
 103         /* Default tda9887 TOP value in dB for SECAM-L/L' for the high band.
 104            Default is 0. Several tuners require a different TOP value for
 105            the SECAM-L/L' standards. Range: -16:+15 */
 106         signed int default_top_secam_high:5;
 107
 108
 109         unsigned int count;
 110         struct tuner_range *ranges;
 111 };
 112
 113 struct tunertype {
 114         char *name;
 115         unsigned int count;
 116         struct tuner_params *params;
 117 };
 118
 119 extern struct tunertype tuners[];
 120 extern unsigned const int tuner_count;
 121
 122 #endif