pvrusb2: Enable radio mode round #2

From: Pantelis Koukousoulas <pakt223@freemail.gr>

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.

 --Pantelis

Signed-off-by: Pantelis Koukousoulas <pakt223@freemail.gr>
Signed-off-by: Mike Isely <isely@pobox.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c b/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c
index 50fcceb15..ed4eed4d5 100644
--- a/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-cmd-v4l2.c
+++ b/linux/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;