lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

rt2x00: Fix HT40 operation in rt2800.

Browse Source 
Closer inspection of the legacy Ralink driver reveals that in case of HT40+
or HT40- we must adjust the frequency settings that we program to the device.
Implement the same adjustment in the rt2x00 code.

With this HT40 seems to work for all devices supported by rt2800pci and
rt2800usb.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
This commit is contained in:
Gertjan van Wingerde
2010-06-03 10:52:08 +02:00
committed by Ivo van Doorn
parent 532bc2d524
commit 06443e46c6
4 changed files with 46 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/net/wireless/rt2x00/rt2x00ht.c
View File

@@ -84,3 +84,31 @@ void rt2x00ht_create_tx_descriptor(struct queue_entry *entry,
else
txdesc->txop = TXOP_HTTXOP;
}
u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
struct ieee80211_conf *conf)
{
struct hw_mode_spec *spec = &rt2x00dev->spec;
int center_channel;
u16 i;
/*
* Initialize center channel to current channel.
*/
center_channel = spec->channels[conf->channel->hw_value].channel;
/*
* Adjust center channel to HT40+ and HT40- operation.
*/
if (conf_is_ht40_plus(conf))
center_channel += 2;
else if (conf_is_ht40_minus(conf))
center_channel -= (center_channel == 14) ? 1 : 2;
for (i = 0; i < spec->num_channels; i++)
if (spec->channels[i].channel == center_channel)
return i;
WARN_ON(1);
return conf->channel->hw_value;
}