Hello!
Since I know that my card (still the same bcm4312) has a problem
receiving data frames and the problem can be mitigated by turning off
the OFDM rates, I decided to check if the bcm43xx_d80211 driver is
receiving data with OFDM rates.
Either I'm missing the obvious, or something is seriously wrong with the
driver and with the specification.
I added this line right after phystat0 is calculated in bcm43xx_rx(),
file bcm43xx_xmit.c:
printk("phystat0 = %04x\n", phystat0);
I loaded the module and tried to associate to a 802.11g AP. I brought
the interface up and set up the parameters (channel, ap, essid). The
link quality became 100/100 (that's a usual value for my setup). As
usually, ping would not work.
That's what I saw on the console:
phystat0 = 0006
phystat0 = 0004
phystat0 = 0006
phystat0 = 0004
phystat0 = 0006
phystat0 = 0004
phystat0 = 0006
phystat0 = 0002
phystat0 = 0006
phystat0 = 0002
OFDM would need an odd number. But 2 means PRE-N, and I don't have a
pre-n AP, it's Atheros 5212 with MadWifi in 802.11g mode.
Moreover, the bit 2 (value 4) is not described at all on
http://bcm-v4.sipsolutions.net/802.11/RX
That's all the values that have been seen:
# dmesg |grep phystat0 |sort -u
phystat0 = 0000
phystat0 = 0002
phystat0 = 0004
phystat0 = 0006
phystat0 = 0008
phystat0 = 0022
phystat0 = 0024
phystat0 = 0040
phystat0 = 0041
phystat0 = 0043
phystat0 = 0060
The value of 3 in the two lower bytes would mean standard 802.11n, and I
don't have it either.
It seems to me that the description of "PHY RX Status 0" has nothing to
to with the reality.
The CPU is x86_64 (Intel Core 2 Duo). I'm using the latest firmware
4.102.15.61. The kernel is current from
http://bu3sch.de/git/wireless-dev.git
Kernel messages on module load:
ACPI: PCI Interrupt 0000:0c:00.0[A] -> GSI 17 (level, low) -> IRQ 17
PCI: Setting latency timer of device 0000:0c:00.0 to 64
ssb: Sonics Silicon Backplane found on PCI device 0000:0c:00.0
ssb: Core 0 found: ChipCommon (cc 0x800, rev 0x11, vendor 0x4243)
ssb: Core 1 found: IEEE 802.11 (cc 0x812, rev 0x0A, vendor 0x4243)
ssb: Core 2 found: USB 1.1 Host (cc 0x817, rev 0x03, vendor 0x4243)
ssb: Core 3 found: PCI-E (cc 0x820, rev 0x01, vendor 0x4243)
ssb: Switching to ChipCommon core, index 0
ssb: Switching to PCI-E core, index 3
wmaster0: Selected rate control algorithm 'simple'
bcm43xx_d80211: Broadcom 4311 WLAN found
ssb: Switching to IEEE 802.11 core, index 1
ssb: Switching to PCI-E core, index 3
ssb: Switching to IEEE 802.11 core, index 1
bcm43xx_d80211: Adding Interface type 2
bcm43xx_d80211: Found PHY: Version 4, Type 2, Revision 8
bcm43xx_d80211: Found Radio: Manuf 0x17F, Version 0x2050, Revision 2
bcm43xx_d80211: Loading firmware version 371.1122 (2006-11-08 22:02:13)
ssb: Switching to ChipCommon core, index 0
ssb: Switching to IEEE 802.11 core, index 1
bcm43xx_d80211: Radio turned on
bcm43xx_d80211: Chip initialized
bcm43xx_d80211: 32-bit DMA initialized
bcm43xx_d80211: Wireless interface started
wmaster0: Does not support passive scan, disabled
--
Regards,
Pavel Roskin
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