tuner-types.h

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/*
 * descriptions for simple tuners.
 */

#ifndef __TUNER_TYPES_H__
#define __TUNER_TYPES_H__

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 {
    unsigned short limit;
    unsigned char config;
    unsigned char cb;
};

struct tuner_params {
    enum param_type type;

    /* Many Philips based tuners have a comment like this in their
     * datasheet:
     *
     *   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.
     */
    unsigned int cb_first_if_lower_freq:1;
    /* Set to 1 if this tuner uses a tda9887 */
    unsigned int has_tda9887:1;
    /* 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. */
    unsigned int port1_fm_high_sensitivity:1;
    /* 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. */
    unsigned int port2_fm_high_sensitivity:1;
    /* 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. */
    unsigned int fm_gain_normal:1;
    /* 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. */
    unsigned int intercarrier_mode:1;
    /* 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. */
    unsigned int port1_active:1;
    /* 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. */
    unsigned int port2_active:1;
    /* Sometimes PORT1 is inverted when the SECAM-L' standard is selected.
       Set this bit to 1 if this is needed. */
    unsigned int port1_invert_for_secam_lc:1;
    /* Sometimes PORT2 is inverted when the SECAM-L' standard is selected.
       Set this bit to 1 if this is needed. */
    unsigned int port2_invert_for_secam_lc:1;
    /* Some cards require PORT1 to be 1 for mono Radio FM and 0 for stereo. */
    unsigned int port1_set_for_fm_mono:1;
    /* Select 18% (or according to datasheet 0%) L standard PLL gating,
       vs the driver default of 36%. */
    unsigned int default_pll_gating_18:1;
    /* 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 */
    unsigned int radio_if:2;
    /* Default tda9887 TOP value in dB for the low band. Default is 0.
       Range: -16:+15 */
    signed int default_top_low:5;
    /* Default tda9887 TOP value in dB for the mid band. Default is 0.
       Range: -16:+15 */
    signed int default_top_mid:5;
    /* Default tda9887 TOP value in dB for the high band. Default is 0.
       Range: -16:+15 */
    signed int default_top_high:5;
    /* 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 */
    signed int default_top_secam_low:5;
    /* 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 */
    signed int default_top_secam_mid:5;
    /* 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 */
    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