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News PCMCIA driver release 3.1.16 

Forum: Announcements of PCMCIA driver updates
Date: 2000, Jun 23
From: David Hinds <dhinds@pcmcia.sourceforge.org>

I've done a fairly major update of the 3c575_cb driver, folding in most of the changes from Donald Becker's latest 3c59x release. I've fixed one old bug with 3CXFE575CT card initialization, where transmits would be "stuck" for 15-30 seconds. I still have a number of unresolved problem reports with this driver, with cards that seem to work fine in my hands. I think these problems will probably turn out to be with the low-level CardBus socket driver code rather than with the 3c575_cb driver, but they have been hard to track down. Some may also relate to undocumented differences between minor chipset revisions. There seem to be cases where several chipset product codes all have the same product name.

This release enables "PCI read prefetch" on Ricoh CardBus bridges. This significantly improves performance of system-to-card bus master operations; I have a report that this made a big difference for 100baseT transmit performance. Normally I would expect the BIOS to take care of this but it seems that can't be relied on.

Some Toshiba users have been reporting an "oops" at startup time with CardBus cards. The basic problem seems to be a Toshiba chipset quirk, that causes the bridge to register an "eject" event right after a card is first powered up. The result was a race between the insert and eject handlers. I've fixed the race to prevent the oops. I'm told that increasing the setup_time and vcc_settle parameters for the pcmcia_core module prevents the insert/eject/insert flipping.

This release also fixes some compatibility problems both with older 2.0.* kernels, and the latest 2.4.0-test1 kernels.

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