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 /* Default tda9887 TOP value in dB for the low band. Default is 0. 83 Range: -16:+15 */ 84 signed int default_top_low:5; 85 /* Default tda9887 TOP value in dB for the mid band. Default is 0. 86 Range: -16:+15 */ 87 signed int default_top_mid:5; 88 /* Default tda9887 TOP value in dB for the high band. Default is 0. 89 Range: -16:+15 */ 90 signed int default_top_high:5; 91 /* Default tda9887 TOP value in dB for SECAM-L/L' for the low band. 92 Default is 0. Several tuners require a different TOP value for 93 the SECAM-L/L' standards. Range: -16:+15 */ 94 signed int default_top_secam_low:5; 95 /* Default tda9887 TOP value in dB for SECAM-L/L' for the mid 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_mid:5; 99 /* Default tda9887 TOP value in dB for SECAM-L/L' for the high 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_high:5; 103 104 105 unsigned int count; 106 struct tuner_range *ranges; 107 }; 108 109 struct tunertype { 110 char *name; 111 unsigned int count; 112 struct tuner_params *params; 113 }; 114 115 extern struct tunertype tuners[]; 116 extern unsigned const int tuner_count; 117 118 #endif 119