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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
};
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;
/* 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;
unsigned int count;
struct tuner_range *ranges;
};
struct tunertype {
char *name;
unsigned int count;
struct tuner_params *params;
};
extern struct tunertype tuners[];
extern unsigned const int tuner_count;
#endif
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