1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * descriptions for simple tuners. 4 */ 5 6 #ifndef __TUNER_TYPES_H__ 7 #define __TUNER_TYPES_H__ 8 9 /** 10 * enum param_type - type of the tuner pameters 11 * 12 * @TUNER_PARAM_TYPE_RADIO: Tuner params are for FM and/or AM radio 13 * @TUNER_PARAM_TYPE_PAL: Tuner params are for PAL color TV standard 14 * @TUNER_PARAM_TYPE_SECAM: Tuner params are for SECAM color TV standard 15 * @TUNER_PARAM_TYPE_NTSC: Tuner params are for NTSC color TV standard 16 * @TUNER_PARAM_TYPE_DIGITAL: Tuner params are for digital TV 17 */ 18 enum param_type { 19 TUNER_PARAM_TYPE_RADIO, 20 TUNER_PARAM_TYPE_PAL, 21 TUNER_PARAM_TYPE_SECAM, 22 TUNER_PARAM_TYPE_NTSC, 23 TUNER_PARAM_TYPE_DIGITAL, 24 }; 25 26 /** 27 * struct tuner_range - define the frequencies supported by the tuner 28 * 29 * @limit: Max frequency supported by that range, in 62.5 kHz 30 * (TV) or 62.5 Hz (Radio), as defined by 31 * V4L2_TUNER_CAP_LOW. 32 * @config: Value of the band switch byte (BB) to setup this mode. 33 * @cb: Value of the CB byte to setup this mode. 34 * 35 * Please notice that digital tuners like xc3028/xc4000/xc5000 don't use 36 * those ranges, as they're defined inside the driver. This is used by 37 * analog tuners that are compatible with the "Philips way" to setup the 38 * tuners. On those devices, the tuner set is done via 4 bytes: 39 * 40 * #) divider byte1 (DB1) 41 * #) divider byte 2 (DB2) 42 * #) Control byte (CB) 43 * #) band switch byte (BB) 44 * 45 * Some tuners also have an additional optional Auxiliary byte (AB). 46 */ 47 struct tuner_range { 48 unsigned short limit; 49 unsigned char config; 50 unsigned char cb; 51 }; 52 53 /** 54 * struct tuner_params - Parameters to be used to setup the tuner. Those 55 * are used by drivers/media/tuners/tuner-types.c in 56 * order to specify the tuner properties. Most of 57 * the parameters are for tuners based on tda9887 IF-PLL 58 * multi-standard analog TV/Radio demodulator, with is 59 * very common on legacy analog tuners. 60 * 61 * @type: Type of the tuner parameters, as defined at 62 * enum param_type. If the tuner supports multiple 63 * standards, an array should be used, with one 64 * row per different standard. 65 * @cb_first_if_lower_freq: Many Philips-based tuners have a comment in 66 * their datasheet like 67 * "For channel selection involving band 68 * switching, and to ensure smooth tuning to the 69 * desired channel without causing unnecessary 70 * charge pump action, it is recommended to 71 * consider the difference between wanted channel 72 * frequency and the current channel frequency. 73 * Unnecessary charge pump action will result 74 * in very low tuning voltage which may drive the 75 * oscillator to extreme conditions". 76 * Set cb_first_if_lower_freq to 1, if this check 77 * is required for this tuner. I tested this for 78 * PAL by first setting the TV frequency to 79 * 203 MHz and then switching to 96.6 MHz FM 80 * radio. The result was static unless the 81 * control byte was sent first. 82 * @has_tda9887: Set to 1 if this tuner uses a tda9887 83 * @port1_fm_high_sensitivity: Many Philips tuners use tda9887 PORT1 to select 84 * the FM radio sensitivity. If this setting is 1, 85 * then set PORT1 to 1 to get proper FM reception. 86 * @port2_fm_high_sensitivity: Some Philips tuners use tda9887 PORT2 to select 87 * the FM radio sensitivity. If this setting is 1, 88 * then set PORT2 to 1 to get proper FM reception. 89 * @fm_gain_normal: Some Philips tuners use tda9887 cGainNormal to 90 * select the FM radio sensitivity. If this 91 * setting is 1, e register will use cGainNormal 92 * instead of cGainLow. 93 * @intercarrier_mode: Most tuners with a tda9887 use QSS mode. 94 * Some (cheaper) tuners use Intercarrier mode. 95 * If this setting is 1, then the tuner needs to 96 * be set to intercarrier mode. 97 * @port1_active: This setting sets the default value for PORT1. 98 * 0 means inactive, 1 means active. Note: the 99 * actual bit value written to the tda9887 is 100 * inverted. So a 0 here means a 1 in the B6 bit. 101 * @port2_active: This setting sets the default value for PORT2. 102 * 0 means inactive, 1 means active. Note: the 103 * actual bit value written to the tda9887 is 104 * inverted. So a 0 here means a 1 in the B7 bit. 105 * @port1_invert_for_secam_lc: Sometimes PORT1 is inverted when the SECAM-L' 106 * standard is selected. Set this bit to 1 if this 107 * is needed. 108 * @port2_invert_for_secam_lc: Sometimes PORT2 is inverted when the SECAM-L' 109 * standard is selected. Set this bit to 1 if this 110 * is needed. 111 * @port1_set_for_fm_mono: Some cards require PORT1 to be 1 for mono Radio 112 * FM and 0 for stereo. 113 * @default_pll_gating_18: Select 18% (or according to datasheet 0%) 114 * L standard PLL gating, vs the driver default 115 * of 36%. 116 * @radio_if: IF to use in radio mode. Tuners with a 117 * separate radio IF filter seem to use 10.7, 118 * while those without use 33.3 for PAL/SECAM 119 * tuners and 41.3 for NTSC tuners. 120 * 0 = 10.7, 1 = 33.3, 2 = 41.3 121 * @default_top_low: Default tda9887 TOP value in dB for the low 122 * band. Default is 0. Range: -16:+15 123 * @default_top_mid: Default tda9887 TOP value in dB for the mid 124 * band. Default is 0. Range: -16:+15 125 * @default_top_high: Default tda9887 TOP value in dB for the high 126 * band. Default is 0. Range: -16:+15 127 * @default_top_secam_low: Default tda9887 TOP value in dB for SECAM-L/L' 128 * for the low band. Default is 0. Several tuners 129 * require a different TOP value for the 130 * SECAM-L/L' standards. Range: -16:+15 131 * @default_top_secam_mid: Default tda9887 TOP value in dB for SECAM-L/L' 132 * for the mid band. Default is 0. Several tuners 133 * require a different TOP value for the 134 * SECAM-L/L' standards. Range: -16:+15 135 * @default_top_secam_high: Default tda9887 TOP value in dB for SECAM-L/L' 136 * for the high band. Default is 0. Several tuners 137 * require a different TOP value for the 138 * SECAM-L/L' standards. Range: -16:+15 139 * @iffreq: Intermediate frequency (IF) used by the tuner 140 * on digital mode. 141 * @count: Size of the ranges array. 142 * @ranges: Array with the frequency ranges supported by 143 * the tuner. 144 */ 145 struct tuner_params { 146 enum param_type type; 147 148 unsigned int cb_first_if_lower_freq:1; 149 unsigned int has_tda9887:1; 150 unsigned int port1_fm_high_sensitivity:1; 151 unsigned int port2_fm_high_sensitivity:1; 152 unsigned int fm_gain_normal:1; 153 unsigned int intercarrier_mode:1; 154 unsigned int port1_active:1; 155 unsigned int port2_active:1; 156 unsigned int port1_invert_for_secam_lc:1; 157 unsigned int port2_invert_for_secam_lc:1; 158 unsigned int port1_set_for_fm_mono:1; 159 unsigned int default_pll_gating_18:1; 160 unsigned int radio_if:2; 161 signed int default_top_low:5; 162 signed int default_top_mid:5; 163 signed int default_top_high:5; 164 signed int default_top_secam_low:5; 165 signed int default_top_secam_mid:5; 166 signed int default_top_secam_high:5; 167 168 u16 iffreq; 169 170 unsigned int count; 171 struct tuner_range *ranges; 172 }; 173 174 /** 175 * struct tunertype - describes the known tuners. 176 * 177 * @name: string with the tuner's name. 178 * @count: size of &struct tuner_params array. 179 * @params: pointer to &struct tuner_params array. 180 * 181 * @min: minimal tuner frequency, in 62.5 kHz step. 182 * should be multiplied to 16 to convert to MHz. 183 * @max: minimal tuner frequency, in 62.5 kHz step. 184 * Should be multiplied to 16 to convert to MHz. 185 * @stepsize: frequency step, in Hz. 186 * @initdata: optional byte sequence to initialize the tuner. 187 * @sleepdata: optional byte sequence to power down the tuner. 188 */ 189 struct tunertype { 190 char *name; 191 unsigned int count; 192 struct tuner_params *params; 193 194 u16 min; 195 u16 max; 196 u32 stepsize; 197 198 u8 *initdata; 199 u8 *sleepdata; 200 }; 201 202 extern struct tunertype tuners[]; 203 extern unsigned const int tuner_count; 204 205 #endif 206