On Tue, 27 Jan 2009 14:28:05 -0800
David Brownell <[email protected]> wrote:
> On Tuesday 27 January 2009, Hugo Villeneuve wrote:
> >
> > > > So if I am using the latest davinci git kernel, should I apply
> > > > your patch? If so where is it located?
> > >
> > > I just resent that.
> >
> > I tried your patch but it actually prevents the driver from being
> > loaded correctly (command 0x0003 timed out):
>
> That's from the libertas driver ... unclear what MMC protocol
> command is involved. Better to see the whole trace with the
> MMC and/or davinci_mmc debug messages. And maybe trace the
> SDIO irq enable/disable.
Just to recap:
1. Yes I am using the libertas driver, and with the latest stock
davinci-2.6 git kernel (latest commit is
f9719b2d8f29e5bef46a51594d79643fff045221 from January 20th) , the
libertas and davinci_mmc drivers seems to load correctly:
$> modprobe davinci_mmc
davinci_mmc davinci_mmc.0: Using DMA, 4-bit mode
r...@das-04:~# mmc0: new SDIO card at address 0001
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
libertas_sdio mmc0:0001:1: firmware: requesting sd8686_helper.bin
libertas_sdio mmc0:0001:1: firmware: requesting sd8686.bin
libertas: 00:13:e0:ab:e0:17, fw 9.70.3p24, cap 0x00000303
libertas: unidentified region code; using the default (USA)
libertas: PREP_CMD: command 0x00a3 failed: 2
libertas: PREP_CMD: command 0x00a3 failed: 2
libertas: eth1: Marvell WLAN 802.11 adapter
(the command 0x00a3 failed message is for some kind of mesh
functionality probing related to the OLPC and is harmless here based
on some Googling).
2. After the drivers are loaded, if I enable the debug messages I
see this in a continuous fashion (it never stops):
$> dmesg -n 8
mmc0: starting CMD52 arg 00000a00 flags 00000195
davinci_mmc davinci_mmc.0: CMD52, arg 0x00000a00, R1/R5/R6/R7 response
mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
mmc0: starting CMD52 arg 00000a00 flags 00000195
davinci_mmc davinci_mmc.0: CMD52, arg 0x00000a00, R1/R5/R6/R7 response
mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
mmc0: starting CMD52 arg 00000a00 flags 00000195
davinci_mmc davinci_mmc.0: CMD52, arg 0x00000a00, R1/R5/R6/R7 response
mmc0: req done (CMD52): 0: 00001000 00000000 00000000 00000000
...
3. With debug messages deactivated (dmesg -n 7), I can start
configuring the wlan adapter but it fails when I try to scan with
iwlist:
$> iwconfig eth1
eth1 IEEE 802.11b/g ESSID:""
Mode:Managed Frequency:2.412 GHz Access Point:
Not-Associated Bit Rate:0 kb/s Tx-Power=18 dBm
Retry short limit:8 RTS thr=2347 B Fragment thr=2346 B
Encryption key:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
$> ifconfig eth1 up
$> iwlist eth1 scan
Unable to handle kernel NULL pointer dereference at virtual address
00000014 pgd = c0004000
...
Hugo V.
---------------
Hugo Villeneuve
www.hugovil.com
---------------
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