From: pelangi15@gmail.com (CL Lee)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Need help EHCI host driver on Linux 2.6.29
Date: Wed, 22 Dec 2010 07:18:35 +0800 [thread overview]
Message-ID: <483A8902-221B-41BE-8953-12921133CA50@gmail.com> (raw)
Dear Experts,
I am developing a EHCI host driver for Linux kernel 2.6.29 on a proprietary SoC. But for weeks now, I am troubleshooting a time out error from khubd.
I believe it's related to the client device not being able to update the qtd struct which has been set at some Dma addresses, say 0x87xxxxxx. Is this possible?
The main issue is the register address for chip lies in 0x5a800000 range, so is the on-chip memory. If I set the qtd structs to on chip memory(internal sram), kernel paging error will occur.
So I am at a loss of what I can. Please kindly advise.
Best regards,
CL
next reply other threads:[~2010-12-21 23:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-21 23:18 CL Lee [this message]
2010-12-22 4:38 ` Need help EHCI host driver on Linux 2.6.29 Greg KH
2010-12-22 5:16 ` Syed Khader
2010-12-22 16:06 ` Bharath H S
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