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         TUNER_PARAM_TYPE_DIGITAL,
  14 };
  15
  16 struct tuner_range {
  17         unsigned short limit;
  18         unsigned char config;
  19         unsigned char cb;
  20 };
  21
  22 struct tuner_params {
  23         enum param_type type;
  24
  25         /* Many Philips based tuners have a comment like this in their
  26          * datasheet:
  27          *
  28          *   For channel selection involving band switching, and to ensure
  29          *   smooth tuning to the desired channel without causing
  30          *   unnecessary charge pump action, it is recommended to consider
  31          *   the difference between wanted channel frequency and the
  32          *   current channel frequency.  Unnecessary charge pump action
  33          *   will result in very low tuning voltage which may drive the
  34          *   oscillator to extreme conditions.
  35          *
  36          * Set cb_first_if_lower_freq to 1, if this check is
  37          * required for this tuner.
  38          *
  39          * I tested this for PAL by first setting the TV frequency to
  40          * 203 MHz and then switching to 96.6 MHz FM radio. The result was
  41          * static unless the control byte was sent first.
  42          */
  43         unsigned int cb_first_if_lower_freq:1;
  44         /* Set to 1 if this tuner uses a tda9887 */
  45         unsigned int has_tda9887:1;
  46         /* Many Philips tuners use tda9887 PORT1 to select the FM radio
  47            sensitivity. If this setting is 1, then set PORT1 to 1 to
  48            get proper FM reception. */
  49         unsigned int port1_fm_high_sensitivity:1;
  50         /* Some Philips tuners use tda9887 PORT2 to select the FM radio
  51            sensitivity. If this setting is 1, then set PORT2 to 1 to
  52            get proper FM reception. */
  53         unsigned int port2_fm_high_sensitivity:1;
  54         /* Some Philips tuners use tda9887 cGainNormal to select the FM radio
  55            sensitivity. If this setting is 1, e register will use cGainNormal
  56            instead of cGainLow. */
  57         unsigned int fm_gain_normal:1;
  58         /* Most tuners with a tda9887 use QSS mode. Some (cheaper) tuners
  59            use Intercarrier mode. If this setting is 1, then the tuner
  60            needs to be set to intercarrier mode. */
  61         unsigned int intercarrier_mode:1;
  62         /* This setting sets the default value for PORT1.
  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 B6 bit. */
  66         unsigned int port1_active:1;
  67         /* This setting sets the default value for PORT2.
  68            0 means inactive, 1 means active. Note: the actual bit
  69            value written to the tda9887 is inverted. So a 0 here
  70            means a 1 in the B7 bit. */
  71         unsigned int port2_active:1;
  72         /* Sometimes PORT1 is inverted when the SECAM-L' standard is selected.
  73            Set this bit to 1 if this is needed. */
  74         unsigned int port1_invert_for_secam_lc:1;
  75         /* Sometimes PORT2 is inverted when the SECAM-L' standard is selected.
  76            Set this bit to 1 if this is needed. */
  77         unsigned int port2_invert_for_secam_lc:1;
  78         /* Some cards require PORT1 to be 1 for mono Radio FM and 0 for stereo. */
  79         unsigned int port1_set_for_fm_mono:1;
  80         /* Select 18% (or according to datasheet 0%) L standard PLL gating,
  81            vs the driver default of 36%. */
  82         unsigned int default_pll_gating_18:1;
  83         /* IF to use in radio mode.  Tuners with a separate radio IF filter
  84            seem to use 10.7, while those without use 33.3 for PAL/SECAM tuners
  85            and 41.3 for NTSC tuners. 0 = 10.7, 1 = 33.3, 2 = 41.3 */
  86         unsigned int radio_if:2;
  87         /* Default tda9887 TOP value in dB for the low band. Default is 0.
  88            Range: -16:+15 */
  89         signed int default_top_low:5;
  90         /* Default tda9887 TOP value in dB for the mid band. Default is 0.
  91            Range: -16:+15 */
  92         signed int default_top_mid:5;
  93         /* Default tda9887 TOP value in dB for the high band. Default is 0.
  94            Range: -16:+15 */
  95         signed int default_top_high:5;
  96         /* Default tda9887 TOP value in dB for SECAM-L/L' for the low band.
  97            Default is 0. Several tuners require a different TOP value for
  98            the SECAM-L/L' standards. Range: -16:+15 */
  99         signed int default_top_secam_low:5;
 100         /* Default tda9887 TOP value in dB for SECAM-L/L' for the mid band.
 101            Default is 0. Several tuners require a different TOP value for
 102            the SECAM-L/L' standards. Range: -16:+15 */
 103         signed int default_top_secam_mid:5;
 104         /* Default tda9887 TOP value in dB for SECAM-L/L' for the high band.
 105            Default is 0. Several tuners require a different TOP value for
 106            the SECAM-L/L' standards. Range: -16:+15 */
 107         signed int default_top_secam_high:5;
 108
 109         u16 iffreq;
 110
 111         unsigned int count;
 112         struct tuner_range *ranges;
 113 };
 114
 115 struct tunertype {
 116         char *name;
 117         unsigned int count;
 118         struct tuner_params *params;
 119
 120         u16 min;
 121         u16 max;
 122         u32 stepsize;
 123
 124         u8 *initdata;
 125         u8 *sleepdata;
 126 };
 127
 128 extern struct tunertype tuners[];
 129 extern unsigned const int tuner_count;
 130
 131 #endif