Messages in this thread | | | Date | Fri, 17 Mar 2000 13:06:27 +0900 (JST) | From | Taisuke Yamada <> | Subject | [bttv/tuner] Invalid hard-coded frequency in FM tuner driver(s). |
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I'm now trying to configure FM tuner that came in set with fairly standard Bt848 + Phillips tuner (NTSC) card.
But it seems hard-coded frequency value in driver is preventing me from using the tuner (I know I SHOULD be able to configure this hardware, because I was able to do it on Windows).
When I looked into drivers/char/bttv.c (or any other tuner driver source), all of them hard-coded frequency range to 87.5MHz - 108MHz. So it's like this:
static int radio_ioctl(...) {
struct video_tuner v; ... v.rangelow = (int)(87.5 * 16); /* 87.5MHz */ v.rangehigh = (int)(108 * 16); /* 108MHz */
Unfortunately, this frequency range differs from region to region, and range of 76.0MHz - 89.9MHz is used in my country.
Shouldn't these values be configurable by ioctl(2) call if they can't be auto-configured from hardware information?
# It seems the author of bttv driver is aware of this possibility # as comment "/* XXX - anything to do ??? */" was in that part of # the code.
-- T. Yamada <tai@imasy.or.jp> PGP fingerprint = 6B 57 1B ED 65 4C 7D AE 57 1B 49 A7 F7 C8 23 46
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