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authorMauro Carvalho Chehab <mchehab@redhat.com>2009-06-01 12:18:10 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-06-16 19:07:18 -0300
commit0a863975e288667fd65737f65f9d4cd5d9817ba9 (patch)
tree3f3fdd5b272ee758803172e5ad684a0feea961b4 /drivers/media/common
parenta1014d70db862c8e9de9207c3a0397e644ad9d4a (diff)
V4L/DVB (11918): tuner-xc2028: Fix offset frequencies for DVB @ 6MHz
Both ATSC and DVB @ 6MHz bandwidth require the same offset. While we're fixing it, let's cleanup the bandwidth setup to better reflect the fact that it is a function of the bandwidth. Thanks to Terry Wu <terrywu2009@gmail.com> for pointing this issue and to Andy Walls <awalls@radix.net> for an initial patch for this fix. Cc: Terry Wu <terrywu2009@gmail.com> Acked-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/common')
-rw-r--r--drivers/media/common/tuners/tuner-xc2028.c33
1 files changed, 20 insertions, 13 deletions
diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c
index 14649e456fd..27e7cb6622b 100644
--- a/drivers/media/common/tuners/tuner-xc2028.c
+++ b/drivers/media/common/tuners/tuner-xc2028.c
@@ -917,22 +917,29 @@ static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */,
* that xc2028 will be in a safe state.
* Maybe this might also be needed for DTV.
*/
- if (new_mode == T_ANALOG_TV) {
+ if (new_mode == T_ANALOG_TV)
rc = send_seq(priv, {0x00, 0x00});
- } else if (priv->cur_fw.type & ATSC) {
- offset = 1750000;
- } else {
- offset = 2750000;
+
+ /*
+ * Digital modes require an offset to adjust to the
+ * proper frequency.
+ * Analog modes require offset = 0
+ */
+ if (new_mode != T_ANALOG_TV) {
+ /* Sets the offset according with firmware */
+ if (priv->cur_fw.type & DTV6)
+ offset = 1750000;
+ else if (priv->cur_fw.type & DTV7)
+ offset = 2250000;
+ else /* DTV8 or DTV78 */
+ offset = 2750000;
+
/*
- * We must adjust the offset by 500kHz in two cases in order
- * to correctly center the IF output:
- * 1) When the ZARLINK456 or DIBCOM52 tables were explicitly
- * selected and a 7MHz channel is tuned;
- * 2) When tuning a VHF channel with DTV78 firmware.
+ * We must adjust the offset by 500kHz when
+ * tuning a 7MHz VHF channel with DTV78 firmware
+ * (used in Australia, Italy and Germany)
*/
- if (((priv->cur_fw.type & DTV7) &&
- (priv->cur_fw.scode_table & (ZARLINK456 | DIBCOM52))) ||
- ((priv->cur_fw.type & DTV78) && freq < 470000000))
+ if ((priv->cur_fw.type & DTV78) && freq < 470000000)
offset -= 500000;
}