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This is used by * analog tuners that are compatible with the "Philips way" to setup the * tuners. On those devices, the tuner set is done via 4 bytes: * * #) divider byte1 (DB1) * #) divider byte 2 (DB2) * #) Control byte (CB) * #) band switch byte (BB) * * Some tuners also have an additional optional Auxiliary byte (AB). */ struct tuner_range { unsigned short limit; unsigned char config; unsigned char cb; }; /** * struct tuner_params - Parameters to be used to setup the tuner. Those * are used by drivers/media/tuners/tuner-types.c in * order to specify the tuner properties. Most of * the parameters are for tuners based on tda9887 IF-PLL * multi-standard analog TV/Radio demodulator, with is * very common on legacy analog tuners. * * @type: Type of the tuner parameters, as defined at * enum param_type. If the tuner supports multiple * standards, an array should be used, with one * row per different standard. * @cb_first_if_lower_freq: Many Philips-based tuners have a comment in * their datasheet like * "For channel selection involving band * switching, and to ensure smooth tuning to the * desired channel without causing unnecessary * charge pump action, it is recommended to * consider the difference between wanted channel * frequency and the current channel frequency. * Unnecessary charge pump action will result * in very low tuning voltage which may drive the * oscillator to extreme conditions". * Set cb_first_if_lower_freq to 1, if this check * is required for this tuner. I tested this for * PAL by first setting the TV frequency to * 203 MHz and then switching to 96.6 MHz FM * radio. The result was static unless the * control byte was sent first. * @has_tda9887: Set to 1 if this tuner uses a tda9887 * @port1_fm_high_sensitivity: Many Philips tuners use tda9887 PORT1 to select * the FM radio sensitivity. If this setting is 1, * then set PORT1 to 1 to get proper FM reception. * @port2_fm_high_sensitivity: Some Philips tuners use tda9887 PORT2 to select * the FM radio sensitivity. If this setting is 1, * then set PORT2 to 1 to get proper FM reception. * @fm_gain_normal: Some Philips tuners use tda9887 cGainNormal to * select the FM radio sensitivity. If this * setting is 1, e register will use cGainNormal * instead of cGainLow. * @intercarrier_mode: Most tuners with a tda9887 use QSS mode. * Some (cheaper) tuners use Intercarrier mode. * If this setting is 1, then the tuner needs to * be set to intercarrier mode. * @port1_active: This setting sets the default value for PORT1. * 0 means inactive, 1 means active. Note: the * actual bit value written to the tda9887 is * inverted. So a 0 here means a 1 in the B6 bit. * @port2_active: This setting sets the default value for PORT2. * 0 means inactive, 1 means active. Note: the * actual bit value written to the tda9887 is * inverted. So a 0 here means a 1 in the B7 bit. * @port1_invert_for_secam_lc: Sometimes PORT1 is inverted when the SECAM-L' * standard is selected. Set this bit to 1 if this * is needed. * @port2_invert_for_secam_lc: Sometimes PORT2 is inverted when the SECAM-L' * standard is selected. Set this bit to 1 if this * is needed. * @port1_set_for_fm_mono: Some cards require PORT1 to be 1 for mono Radio * FM and 0 for stereo. * @default_pll_gating_18: Select 18% (or according to datasheet 0%) * L standard PLL gating, vs the driver default * of 36%. * @radio_if: IF to use in radio mode. Tuners with a * separate radio IF filter seem to use 10.7, * while those without use 33.3 for PAL/SECAM * tuners and 41.3 for NTSC tuners. * 0 = 10.7, 1 = 33.3, 2 = 41.3 * @default_top_low: Default tda9887 TOP value in dB for the low * band. Default is 0. Range: -16:+15 * @default_top_mid: Default tda9887 TOP value in dB for the mid * band. Default is 0. Range: -16:+15 * @default_top_high: Default tda9887 TOP value in dB for the high * band. Default is 0. Range: -16:+15 * @default_top_secam_low: Default tda9887 TOP value in dB for SECAM-L/L' * for the low band. Default is 0. Several tuners * require a different TOP value for the * SECAM-L/L' standards. Range: -16:+15 * @default_top_secam_mid: Default tda9887 TOP value in dB for SECAM-L/L' * for the mid band. Default is 0. Several tuners * require a different TOP value for the * SECAM-L/L' standards. Range: -16:+15 * @default_top_secam_high: Default tda9887 TOP value in dB for SECAM-L/L' * for the high band. Default is 0. Several tuners * require a different TOP value for the * SECAM-L/L' standards. Range: -16:+15 * @iffreq: Intermediate frequency (IF) used by the tuner * on digital mode. * @count: Size of the ranges array. * @ranges: Array with the frequency ranges supported by * the tuner. */ struct tuner_params { enum param_type type; unsigned int cb_first_if_lower_freq:1; unsigned int has_tda9887:1; unsigned int port1_fm_high_sensitivity:1; unsigned int port2_fm_high_sensitivity:1; unsigned int fm_gain_normal:1; unsigned int intercarrier_mode:1; unsigned int port1_active:1; unsigned int port2_active:1; unsigned int port1_invert_for_secam_lc:1; unsigned int port2_invert_for_secam_lc:1; unsigned int port1_set_for_fm_mono:1; unsigned int default_pll_gating_18:1; unsigned int radio_if:2; signed int default_top_low:5; signed int default_top_mid:5; signed int default_top_high:5; signed int default_top_secam_low:5; signed int default_top_secam_mid:5; signed int default_top_secam_high:5; u16 iffreq; unsigned int count; struct tuner_range *ranges; }; /** * struct tunertype - describes the known tuners. * * @name: string with the tuner's name. * @count: size of &struct tuner_params array. * @params: pointer to &struct tuner_params array. * * @min: minimal tuner frequency, in 62.5 kHz step. * should be multiplied to 16 to convert to MHz. * @max: minimal tuner frequency, in 62.5 kHz step. * Should be multiplied to 16 to convert to MHz. * @stepsize: frequency step, in Hz. * @initdata: optional byte sequence to initialize the tuner. * @sleepdata: optional byte sequence to power down the tuner. */ struct tunertype { char *name; unsigned int count; struct tuner_params *params; u16 min; u16 max; u32 stepsize; u8 *initdata; u8 *sleepdata; }; extern struct tunertype tuners[]; extern unsigned const int tuner_count; #endif