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tuner-types.h
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tuner-types.h
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/*
* descriptions for simple tuners.
*/
#ifndef __TUNER_TYPES_H__
#define __TUNER_TYPES_H__
/**
* enum param_type - type of the tuner pameters
*
* @TUNER_PARAM_TYPE_RADIO: Tuner params are for FM and/or AM radio
* @TUNER_PARAM_TYPE_PAL: Tuner params are for PAL color TV standard
* @TUNER_PARAM_TYPE_SECAM: Tuner params are for SECAM color TV standard
* @TUNER_PARAM_TYPE_NTSC: Tuner params are for NTSC color TV standard
* @TUNER_PARAM_TYPE_DIGITAL: Tuner params are for digital TV
*/
enum param_type {
TUNER_PARAM_TYPE_RADIO,
TUNER_PARAM_TYPE_PAL,
TUNER_PARAM_TYPE_SECAM,
TUNER_PARAM_TYPE_NTSC,
TUNER_PARAM_TYPE_DIGITAL,
};
/**
* struct tuner_range - define the frequencies supported by the tuner
*
* @limit: Max frequency supported by that range, in 62.5 kHz
* (TV) or 62.5 Hz (Radio), as defined by
* V4L2_TUNER_CAP_LOW.
* @config: Value of the band switch byte (BB) to setup this mode.
* @cb: Value of the CB byte to setup this mode.
*
* Please notice that digital tuners like xc3028/xc4000/xc5000 don't use
* those ranges, as they're defined inside the driver. 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) and
* 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 {
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