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| author | Pantelis Koukousoulas <pakt223@freemail.gr> | 2006-12-28 03:06:04 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-02-21 16:34:22 +0100 |
| commit | 25d8527a441760c333c41ec7197ba0750780b371 (patch) | |
| tree | 9c0904bf4c220e2fbcb821cf200c366af8b70cce /drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c | |
| parent | V4L/DVB (5034): Pvrusb2: Enable radio mode round #1 (diff) | |
| download | linux-25d8527a441760c333c41ec7197ba0750780b371.tar.xz linux-25d8527a441760c333c41ec7197ba0750780b371.zip | |
V4L/DVB (5035): Pvrusb2: Enable radio mode round #2
This is the logic that:
a) Ensures /sys/class/pvrusb2/sn-*/ctl_frequency/{max,min}_val are
"automagically" reset to sane values on each mode change.
b) Allows tuning to a radio frequency by something like:
echo `perl -e "print int(94.9*16000 + 0.5)"` \
> /sys/class/pvrusb2/sn-*/ctl_input/cur_val
The trick was to take advantage of the already existing .get_{min,max}_value
function pointers in pvr2_ctrl, to "dynamically override" the hardcoded values
for min/max frequency at runtime.
For a moment I thought to dispose of the hardcoded MIN/MAX_FREQ and use the
hirange/lowrange fields of the v4l2_tuner struct instead, but then I see that
tuner-core.c kinda hardcodes these as well, so I decided to not bother.
Signed-off-by: Pantelis Koukousoulas <pakt223@freemail.gr>
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c index 50fcceb15d51..ed4eed4d55c4 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c +++ b/drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c @@ -169,7 +169,9 @@ static void set_frequency(struct pvr2_hdw *hdw) fv = hdw->freqVal; pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_freq(%lu)",fv); memset(&freq,0,sizeof(freq)); - freq.frequency = fv / 62500; + if (hdw->input_val == PVR2_CVAL_INPUT_TV) + fv /= 62500; + freq.frequency = fv; freq.tuner = 0; freq.type = (hdw->input_val == PVR2_CVAL_INPUT_RADIO) ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; |