root/include/media/tuner-types.h

/*
 * 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