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Altera_Forum
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19 years ago

ISP1761 USB driver

There's a good news. Philips semi had opened their ISP1761 driver on sf.net as GPL. It does support ISO transfer. ( the current ISP1362 driver does not support ISO transfer) It is for 2.6.9 ...
Altera_Forum's avatar
Altera_Forum
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19 years ago

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originally posted by hippo@Feb 7 2007, 10:08 AM

please check if it is endian issue.

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Well, no one else came to my rescue with anything more profound than "an endian issue".

After some days of bug-hunting there were several issues related to "endianess" although a couple of them not at all obvious (to me!;o) but related to target CPU being in BE and USB2.0 & ISP1761 working in LE.

The biggest headache was composition of PIDs which are in QTD "token" to PTD &#39;token&#39;. This ends up in DW2 of the QHA. In the posts above this second dword is zero using the Philips example code and shouldn&#39;t be, it was not converted to target CPU BE representation.

There were a couple of other similar issues with QTD representation. Once these were changed in the example driver it all sprung to life on PPC platform.

Hope this is of some help to others on non-LE CPUs.

Mike.