7049327a68
This patch makes the driver report signal information for rtl8185 boards using dBm instead of unspecified unit. Rtl8180 remains untouched. I did some tests to confirm the correctness of the measure performed by the board and it seems reasonably correct. The test setup has been made by connecting an AP with coax and RF attenuators to the card antenna port. In order to get a reference measure I tried with several cards with different chipset I own. I found that many gave different results, and I finally selected two cards that gave me consistent results to use as reference: AR9271 and Prism54-usb (isl3887 with Frisbee radio). Using this references I compared the RSSI information with my rtl8185 and I repeated tests with three different attenuation values, increasing attenuation by 10dB each step. I made only relative measures, making NO assumption about source power. CCK measures seem very close to my references, OFDM are a little bit less precise but, considering that these cards are not measuring instrumentation, IMHO this is still fairly good. CCK measures (1Mbps beacons) ATTENUATOR 1 p54usb: -58dBm ath9k_htc: -59dBm rtl8185: -59dBm ATTENUATOR 2 p54usb: -67dBm ath9k_htc: -68dBm rtl8185: -70dBm ATTENUATOR 3 p54usb: -78dBm ath9k_htc: -79dBm rtl8185: -79dBm OFDM measures (54Mbps ping) ATTENUATOR 1 p54usb: -58dBm ath9k_htc: -57dBm rtl8185: -62dBm ATTENUATOR 2 p54usb: -68dBm rtl8185: -71dBm Signed-off-by: Andrea Merello <andrea.merello@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> |
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| .. | ||
| dev.c | ||
| grf5101.c | ||
| grf5101.h | ||
| Makefile | ||
| max2820.c | ||
| max2820.h | ||
| rtl8180.h | ||
| rtl8225.c | ||
| rtl8225.h | ||
| rtl8225se.c | ||
| rtl8225se.h | ||
| sa2400.c | ||
| sa2400.h | ||