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staging: vt6655: CARDbSetBeaconPeriod call CARDbGetCurrentTSF to get TBTT 

There is already a function to get next TBTT.

Replace code with CARDqGetNextTBTT.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Malcolm Priestley 2014-08-10 12:22:00 +01:00 committed by Greg Kroah-Hartman
parent 989ae8601b
commit 4a5f718409
1 changed files with 1 additions and 19 deletions
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20
drivers/staging/vt6655/card.c
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@ -606,29 +606,11 @@ bool CARDbUpdateTSF(void *pDeviceHandler, unsigned char byRxRate, u64 qwBSSTimes
bool CARDbSetBeaconPeriod(void *pDeviceHandler, unsigned short wBeaconInterval)
{
PSDevice pDevice = (PSDevice) pDeviceHandler;
unsigned int uBeaconInterval = 0;
unsigned int uLowNextTBTT = 0;
unsigned int uHighRemain = 0;
unsigned int uLowRemain = 0;
u64 qwNextTBTT = 0;
CARDbGetCurrentTSF(pDevice->PortOffset, &qwNextTBTT); //Get Local TSF counter
uBeaconInterval = wBeaconInterval * 1024;
// Next TBTT = ((local_current_TSF / beacon_interval) + 1) * beacon_interval
uLowNextTBTT = ((qwNextTBTT & 0xffffffffULL) >> 10) << 10;
uLowRemain = (uLowNextTBTT) % uBeaconInterval;
// high dword (mod) bcn
uHighRemain = (((0xffffffff % uBeaconInterval) + 1) * (u32)(qwNextTBTT >> 32))
% uBeaconInterval;
uLowRemain = (uHighRemain + uLowRemain) % uBeaconInterval;
uLowRemain = uBeaconInterval - uLowRemain;
// check if carry when add one beacon interval
if ((~uLowNextTBTT) < uLowRemain)
qwNextTBTT = ((qwNextTBTT >> 32) + 1) << 32;
qwNextTBTT = (qwNextTBTT & 0xffffffff00000000ULL) |
(u64)(uLowNextTBTT + uLowRemain);
qwNextTBTT = CARDqGetNextTBTT(qwNextTBTT, wBeaconInterval);
// set HW beacon interval
VNSvOutPortW(pDevice->PortOffset + MAC_REG_BI, wBeaconInterval);