On Sat, Oct 11, 2008 at 11:01 PM, Cameron Hutchison <lists@xxxxxxxx> wrote: > I've just loaded linux kernel 2.6.27 onto a box that I have that > contains a TP-Link TLWN861N atheros minipci card. It identifes as a > AR5416: > > 00:09.0 Network controller: Atheros Communications Inc. AR5416 802.11abgn Wireless PCI Adapter (rev 01) > Subsystem: Atheros Communications Inc. Device 2079 > Flags: 66MHz, medium devsel, IRQ 17 > Memory at fcfe0000 (32-bit, non-prefetchable) [size=64K] > Capabilities: [40] #80 [0000] > Kernel modules: ath9k > > When I try to load the ath9k module (with all debugging messages > enabled) I get the following kernel messages: > > ath9k: 0.1 > ath9k 0000:00:09.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 > ath_init: devid 0x23 > ath9k_hw_setpower: AWAKE -> AWAKE (set chip ) > ath9k_hw_do_attach: serialize_regmode is 0 > ath9k_hw_do_attach: This Mac Chip Rev 0x0d.2 is > ath9k_hw_chip_test: address test failed addr: 0x00008000 - wr:0x00ff00ff != rd:0x00ff00ef This is during ath9k_hw_chip_test(), which is a simple loop to test write/read on 2 registers to see if the written values can be read as the same values. The two registers are: AR_STA_ID0 which is 0x8000 AR_PHY_BASE + (8 << 2) which is 0x9800 + (8<<2) --> 0x9820 AR_STA_ID0 is used to store part of the MAC address and 0x9820 is just one of the PHY registers. So we test writing and reading a 256 times to each register some arbitrary value. We also try writing and reading some 4 specific patterns just to be sure. > ath9k_hw_post_attach: hardware self-test failed This means when it tried to write to a register it then tried reading the value on the register but didn't get what it was expecting. In your case we tried writing to register offset 0x8000 the value 0x00ff00ff but read 0x00ff00ef, this test will only continue if the value read was 0x00ff00ef so for some reason a bit was lost and the hardware was unable to write the 5th bit on that register. If we continue this could lead to issues. It seems you may have a faulty wireless card, specifically bit #5 on register 0x8000. Maybe the card is loose? Have you seen it working before? Luis -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
