[deliverable/linux.git] / 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
};

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;

	unsigned int count;
	struct tuner_range *ranges;
};

struct tunertype {
	char *name;
	struct tuner_params *params;
};

extern struct tunertype tuners[];
extern unsigned const int tuner_count;

#endif
Commit	Line	Data
7b0ac9cd MK	1	/*
	2	* descriptions for simple tuners.
	3	*/
	4
	5	#ifndef __TUNER_TYPES_H__
	6	#define __TUNER_TYPES_H__
	7
	8	enum param_type {
	9	TUNER_PARAM_TYPE_RADIO, \
	10	TUNER_PARAM_TYPE_PAL, \
	11	TUNER_PARAM_TYPE_SECAM, \
c943aa85	12	TUNER_PARAM_TYPE_NTSC
7b0ac9cd MK	13	};
	14
	15	struct tuner_range {
	16	unsigned short limit;
3fc46d35	17	unsigned char config;
7b0ac9cd MK	18	unsigned char cb;
	19	};
	20
	21	struct tuner_params {
	22	enum param_type type;
27487d44 HV	23	/* Many Philips based tuners have a comment like this in their
	24	* datasheet:
	25	*
	26	* For channel selection involving band switching, and to ensure
	27	* smooth tuning to the desired channel without causing
	28	* unnecessary charge pump action, it is recommended to consider
	29	* the difference between wanted channel frequency and the
	30	* current channel frequency. Unnecessary charge pump action
	31	* will result in very low tuning voltage which may drive the
	32	* oscillator to extreme conditions.
	33	*
de03d21b	34	* Set cb_first_if_lower_freq to 1, if this check is
01872c5d	35	* required for this tuner.
27487d44 HV	36	*
	37	* I tested this for PAL by first setting the TV frequency to
	38	* 203 MHz and then switching to 96.6 MHz FM radio. The result was
	39	* static unless the control byte was sent first.
	40	*/
	41	unsigned int cb_first_if_lower_freq:1;
7b0ac9cd MK	42
	43	unsigned int count;
	44	struct tuner_range *ranges;
	45	};
	46
	47	struct tunertype {
	48	char *name;
7b0ac9cd MK	49	struct tuner_params *params;
	50	};
	51
	52	extern struct tunertype tuners[];
	53	extern unsigned const int tuner_count;
	54
	55	#endif