1472dc9b88
fix logical/bit and confusion Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: <lrodriguez@atheros.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2007-2008 Atheros Communications Inc.
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
/* */
|
|
/* Module Name : cwm.c */
|
|
/* */
|
|
/* Abstract */
|
|
/* This module contains channel width related functions. */
|
|
/* */
|
|
/* NOTES */
|
|
/* None */
|
|
/* */
|
|
/************************************************************************/
|
|
|
|
#include "cprecomp.h"
|
|
|
|
|
|
|
|
void zfCwmInit(zdev_t* dev) {
|
|
//u16_t i;
|
|
zmw_get_wlan_dev(dev);
|
|
|
|
switch (wd->wlanMode) {
|
|
case ZM_MODE_AP:
|
|
wd->cwm.cw_mode = CWM_MODE2040;
|
|
wd->cwm.cw_width = CWM_WIDTH40;
|
|
wd->cwm.cw_enable = 1;
|
|
break;
|
|
case ZM_MODE_INFRASTRUCTURE:
|
|
case ZM_MODE_PSEUDO:
|
|
case ZM_MODE_IBSS:
|
|
default:
|
|
wd->cwm.cw_mode = CWM_MODE2040;
|
|
wd->cwm.cw_width = CWM_WIDTH20;
|
|
wd->cwm.cw_enable = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
void zfCoreCwmBusy(zdev_t* dev, u16_t busy)
|
|
{
|
|
|
|
zmw_get_wlan_dev(dev);
|
|
|
|
zm_msg1_mm(ZM_LV_0, "CwmBusy=", busy);
|
|
|
|
if(wd->cwm.cw_mode == CWM_MODE20) {
|
|
wd->cwm.cw_width = CWM_WIDTH20;
|
|
return;
|
|
}
|
|
|
|
if(wd->cwm.cw_mode == CWM_MODE40) {
|
|
wd->cwm.cw_width = CWM_WIDTH40;
|
|
return;
|
|
}
|
|
|
|
if (busy) {
|
|
wd->cwm.cw_width = CWM_WIDTH20;
|
|
return;
|
|
}
|
|
|
|
|
|
if((wd->wlanMode == ZM_MODE_INFRASTRUCTURE || wd->wlanMode == ZM_MODE_PSEUDO ||
|
|
wd->wlanMode == ZM_MODE_IBSS)) {
|
|
if ((wd->sta.ie.HtCap.HtCapInfo & HTCAP_SupChannelWidthSet) &&
|
|
(wd->sta.ie.HtInfo.ChannelInfo & ExtHtCap_RecomTxWidthSet) &&
|
|
(wd->sta.ie.HtInfo.ChannelInfo & ExtHtCap_ExtChannelOffsetAbove)) {
|
|
|
|
wd->cwm.cw_width = CWM_WIDTH40;
|
|
}
|
|
else {
|
|
wd->cwm.cw_width = CWM_WIDTH20;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if(wd->wlanMode == ZM_MODE_AP) {
|
|
wd->cwm.cw_width = CWM_WIDTH40;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
u16_t zfCwmIsExtChanBusy(u32_t ctlBusy, u32_t extBusy)
|
|
{
|
|
u32_t busy; /* percentage */
|
|
u32_t cycleTime, ctlClear;
|
|
|
|
cycleTime = 1280000; //1.28 seconds
|
|
|
|
if (cycleTime > ctlBusy) {
|
|
ctlClear = cycleTime - ctlBusy;
|
|
}
|
|
else
|
|
{
|
|
ctlClear = 0;
|
|
}
|
|
|
|
/* Compute ratio of extension channel busy to control channel clear
|
|
* as an approximation to extension channel cleanliness.
|
|
*
|
|
* According to the hardware folks, ext rxclear is undefined
|
|
* if the ctrl rxclear is de-asserted (i.e. busy)
|
|
*/
|
|
if (ctlClear) {
|
|
busy = (extBusy * 100) / ctlClear;
|
|
} else {
|
|
busy = 0;
|
|
}
|
|
if (busy > ATH_CWM_EXTCH_BUSY_THRESHOLD) {
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|