Hello Group,
I don't know why it is so hard for hardware vendors to implement pci bus ...
A few weeks ago I tried IXP425 platform, now Atheros with ar7161 on Ubiquiti
Routerstation, pci bus isn't working, too.
I'm trying current OpenWrt trunk version for this platform.
Already tried kernel versions 2.6.28, 2.6.30 and 2.6.31.
on every platform the same error if i "insmod ssb":
PCI: Enabling device 0000:00:11.0 (0000 -> 0002)
PCI: Setting latency timer of device 0000:00:11.0 to 64
PCI error 1 at PCI addr 0x10001000
Data bus error, epc == 80164df4, ra == 830026a0
Oops[#1]:
Cpu 0
$ 0 : 00000000 00000073 0000c0de 00000000
$ 4 : b0001002 830eff80 00000000 839cb038
$ 8 : 00000000 800643f0 802d0000 802e0000
$12 : 802d0000 00100100 802d3868 765f6972
$16 : 830eff82 00000001 839cb000 839cb000
$20 : 839d3b90 00408dbc 004953c4 00000002
$24 : 00000018 00000000
$28 : 839d2000 839d3b38 7f8bcb80 830026a0
Hi : 00000000
Lo : 00000000
epc : 80164df4 ioread16+0x8/0x10
Tainted: P
ra : 830026a0 ssb_attr_sprom_show+0x44c/0x480 [ssb]
Status: 1000fc03 KERNEL EXL IE
Cause : 9080001c
PrId : 00019374 (MIPS 24Kc)
Modules linked in: ssb(+) ohci_hcd ath_pci ath_hal(P) nf_nat_tftp
nf_conntrack_tftp nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp
ipt_MASQUERADE iptable_nat nf_nat xt_NOTRACK iptable_raw xt_state
nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack ehci_hcd pppoe pppox ipt_REJECT
xt_TCPMSS ipt_LOG xt_multiport xt_mac xt_limit iptable_mangle iptable_filter
ip_tables xt_tcpudp x_tables ppp_async ppp_generic slhc usbcore crc_ccitt
michael_mic arc4 aes_generic deflate ecb cbc cryptomgr crypto_hash
crypto_blkcipher aead crypto_algapi button_hotplug gpio_buttons input_polldev
input_core leds_gpio
Process insmod (pid: 662, threadinfo=839d2000, task=839f8d68, tls=00000000)
Stack : 839d3b58 83007d90 00000000 839cb000 fffffff4 839cb000 830eff80 83002b9c
839cb2dc 83003cac 00000000 00000001 00000000 839cb000 839cb2dc 839d3b90
83002b4c 83000f6c 00000000 0000000d 00000001 83007de4 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
...
Call Trace:
[<80164df4>] ioread16+0x8/0x10
[<830026a0>] ssb_attr_sprom_show+0x44c/0x480 [ssb]
Code: 304200ff 38840002 94820000 <03e00008> 3042ffff 38840002 94820000
03e00008 3042ffff
I already tried to insert printk before and after ioread16 to have a delay. But
it already crashes at the first ioread16 in sprom_do_read.
I then tried ioread8 and ioread32 instead of ioread16 (which did not work in
IXP425).
But I cannot resolve it.
Gabor says that the pci controller of Atheros SoC has a hardware bug and nobody
knows exactly about it:
"The PCI Host Controller in the AR71xx SoCs has a hardware bug. At least
everyone
says this, but (apart from the Atheros' engineers) nobody knows what is this bug
exactly."
Is it right, that the only way to get 4 minipci cards working is a x86 PC with a
big huge ATX power supply and a big case? I know of ALIX but I want something
small and cheap for driving bcm4306 cards ... :(
Thanks for any help,
Daniel
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