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author | Michael Krufky <mkrufky@m1k.net> | 2006-01-13 16:10:25 (GMT) |
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committer | Mauro Carvalho Chehab <mchehab@brturbo.com.br> | 2006-01-13 16:10:25 (GMT) |
commit | 7b0ac9cdd42b254ae2ec0f6c1cc6389655e4ba96 (patch) | |
tree | c290ba6d44a608feb22e7d7af177a915419f88f3 /include | |
parent | f4efb4dbf21c78939e32d96cad145421c8b5f106 (diff) | |
download | linux-7b0ac9cdd42b254ae2ec0f6c1cc6389655e4ba96.tar.xz |
V4L/DVB (3359): Redesign tuners struct for maximum flexibility
- Tunertype struct redefined to allow one or more tuner_params structs
per tuner definition, one for each video standard.
- Each tuner_params struct has an element containing an arbitrary
amount of tuner_ranges.
(this is needed for dvb tuners - to be handled later)
- A tuner_range may be referenced by multiple tuner_params structs.
There are many duplicates in here. Reusing tuner_range structs,
rather than defining new ones for each tuner, will cut down on
memory usage, and is preferred when possible.
- tunertype struct contains an element, has_tda988x.
We must set this for all tunertypes that contain a tda988x
chip, and then we can remove this setting from the various
card structs.
- Improves tuners array memory usage efficiency.
- Right now, all tuners are using the first tuner_params[] array element
for analog mode. In the future, we will be merging similar tuner
definitions together, such that each tuner definition will have a
tuner_params struct for each available video standard. At that point,
the tuner_params[] array element will be chosen based on the video
standard in use.
Signed-off-by: Michael Krufky <mkrufky@m1k.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/media/tuner-types.h | 41 | ||||
-rw-r--r-- | include/media/tuner.h | 1 |
2 files changed, 42 insertions, 0 deletions
diff --git a/include/media/tuner-types.h b/include/media/tuner-types.h new file mode 100644 index 0000000..9f6e4a9 --- /dev/null +++ b/include/media/tuner-types.h @@ -0,0 +1,41 @@ +/* + * 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_ATSC, \ + TUNER_PARAM_TYPE_DVBT, \ + TUNER_PARAM_TYPE_DVBS, \ + TUNER_PARAM_TYPE_DVBC +}; + +struct tuner_range { + unsigned short limit; + unsigned char cb; +}; + +struct tuner_params { + enum param_type type; + unsigned char config; /* to be moved into struct tuner_range for dvb-pll merge */ + + unsigned int count; + struct tuner_range *ranges; +}; + +struct tunertype { + char *name; + unsigned int has_tda988x:1; + struct tuner_params *params; +}; + +extern struct tunertype tuners[]; +extern unsigned const int tuner_count; + +#endif diff --git a/include/media/tuner.h b/include/media/tuner.h index 27cbf08..c88b506 100644 --- a/include/media/tuner.h +++ b/include/media/tuner.h @@ -23,6 +23,7 @@ #define _TUNER_H #include <linux/videodev2.h> +#include <media/tuner-types.h> #define ADDR_UNSET (255) |