WorkStruct: Typedef the work function prototype
[linux-2.6/verdex.git] / include / media / tuner-types.h
blob37dad07a8439434c26127c2c766ceb8b2c03354f
1 /*
2 * descriptions for simple tuners.
3 */
5 #ifndef __TUNER_TYPES_H__
6 #define __TUNER_TYPES_H__
8 enum param_type {
9 TUNER_PARAM_TYPE_RADIO, \
10 TUNER_PARAM_TYPE_PAL, \
11 TUNER_PARAM_TYPE_SECAM, \
12 TUNER_PARAM_TYPE_NTSC
15 struct tuner_range {
16 unsigned short limit;
17 unsigned char config;
18 unsigned char cb;
21 struct tuner_params {
22 enum param_type type;
24 /* Many Philips based tuners have a comment like this in their
25 * datasheet:
27 * For channel selection involving band switching, and to ensure
28 * smooth tuning to the desired channel without causing
29 * unnecessary charge pump action, it is recommended to consider
30 * the difference between wanted channel frequency and the
31 * current channel frequency. Unnecessary charge pump action
32 * will result in very low tuning voltage which may drive the
33 * oscillator to extreme conditions.
35 * Set cb_first_if_lower_freq to 1, if this check is
36 * required for this tuner.
38 * I tested this for PAL by first setting the TV frequency to
39 * 203 MHz and then switching to 96.6 MHz FM radio. The result was
40 * static unless the control byte was sent first.
42 unsigned int cb_first_if_lower_freq:1;
43 /* Set to 1 if this tuner uses a tda9887 */
44 unsigned int has_tda9887:1;
45 /* Many Philips tuners use tda9887 PORT1 to select the FM radio
46 sensitivity. If this setting is 1, then set PORT1 to 1 to
47 get proper FM reception. */
48 unsigned int port1_fm_high_sensitivity:1;
49 /* Some Philips tuners use tda9887 PORT2 to select the FM radio
50 sensitivity. If this setting is 1, then set PORT2 to 1 to
51 get proper FM reception. */
52 unsigned int port2_fm_high_sensitivity:1;
53 /* Most tuners with a tda9887 use QSS mode. Some (cheaper) tuners
54 use Intercarrier mode. If this setting is 1, then the tuner
55 needs to be set to intercarrier mode. */
56 unsigned int intercarrier_mode:1;
57 /* This setting sets the default value for PORT1.
58 0 means inactive, 1 means active. Note: the actual bit
59 value written to the tda9887 is inverted. So a 0 here
60 means a 1 in the B6 bit. */
61 unsigned int port1_active:1;
62 /* This setting sets the default value for PORT2.
63 0 means inactive, 1 means active. Note: the actual bit
64 value written to the tda9887 is inverted. So a 0 here
65 means a 1 in the B7 bit. */
66 unsigned int port2_active:1;
67 /* Sometimes PORT1 is inverted when the SECAM-L' standard is selected.
68 Set this bit to 1 if this is needed. */
69 unsigned int port1_invert_for_secam_lc:1;
70 /* Sometimes PORT2 is inverted when the SECAM-L' standard is selected.
71 Set this bit to 1 if this is needed. */
72 unsigned int port2_invert_for_secam_lc:1;
73 /* Some cards require PORT1 to be 1 for mono Radio FM and 0 for stereo. */
74 unsigned int port1_set_for_fm_mono:1;
75 /* Select 18% (or according to datasheet 0%) L standard PLL gating,
76 vs the driver default of 36%. */
77 unsigned int default_pll_gating_18:1;
78 /* Default tda9887 TOP value in dB for the low band. Default is 0.
79 Range: -16:+15 */
80 signed int default_top_low:5;
81 /* Default tda9887 TOP value in dB for the mid band. Default is 0.
82 Range: -16:+15 */
83 signed int default_top_mid:5;
84 /* Default tda9887 TOP value in dB for the high band. Default is 0.
85 Range: -16:+15 */
86 signed int default_top_high:5;
87 /* Default tda9887 TOP value in dB for SECAM-L/L' for the low band.
88 Default is 0. Several tuners require a different TOP value for
89 the SECAM-L/L' standards. Range: -16:+15 */
90 signed int default_top_secam_low:5;
91 /* Default tda9887 TOP value in dB for SECAM-L/L' for the mid band.
92 Default is 0. Several tuners require a different TOP value for
93 the SECAM-L/L' standards. Range: -16:+15 */
94 signed int default_top_secam_mid:5;
95 /* Default tda9887 TOP value in dB for SECAM-L/L' for the high band.
96 Default is 0. Several tuners require a different TOP value for
97 the SECAM-L/L' standards. Range: -16:+15 */
98 signed int default_top_secam_high:5;
101 unsigned int count;
102 struct tuner_range *ranges;
105 struct tunertype {
106 char *name;
107 unsigned int count;
108 struct tuner_params *params;
111 extern struct tunertype tuners[];
112 extern unsigned const int tuner_count;
114 #endif