- replace rssadapt(9) with amrr for automatic rate control.
- don't blindly IFQ_DEQUEUE() then drop a Tx packet if there are no
available Tx resources.
- move default MAC/BBP/RF settings from rt2661.c to rt2661reg.h.
- enable packet bursting when operating as a STA.
- implement new ic_updateslot() callback.
- in hostap mode, we defer update of the slot time until all associated
STAs are notified with updated beacons.
- 802.11a uses a 16 microseconds short interframe space.
- Fix rt2661_set_macaddr() so that we don't override the "unicast to me"
flag in RT2661_MAC_CSR3 when setting the MAC address.
- fix index of ERP information element in beacons.
Add a couple of tweaks of my own:
- The RX/TX BUSY flag should be the last thing written to a descriptor.
- Check and service any additional h/w interrupts before returning
from the isr.
Tested in STA, AP, and Monitor modes. Tested with WEP, WPA, and WPA2 crypto.
Additional testing by xtraeme@
Keep track of the average RSSI using an Exponential Moving Average (EMA).
Use it to dynamically tune radio receive sensitivity.
The idea is simple:
- increase sensitivity when the RSSI is bad to optimize throughput on
long distance to the AP, and
- decrease sensitivity when the RSSI is good to reduce noise level and
optimize throughput on short distance to the AP
The EMA allows to smooth RSSI variations so we don't end up changing the
sensitivity too frequently. We check if it would be worth updating the
sensitivity every one second.
RSSI thresholds were taken from the Ralink Tech. Linux driver.
from FreeBSD/OpenBSD that supersedes ral*.[ch].
Not yet enabled because I don't have a CardBus controller to test and it
will most likely crash during detach.
I tried to include our modifications, but if something is missing please
tell me or add it.
Special thanks to minipci.biz for the donation of one PCI RT2661 and
one CardBus RT2661.
