[realtek] rtl8139 driver for selected media patch

[Bernard Lee]

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Hi there,

I came across a cosmetic enhancement for rtl8139
driver.

RTL8139 users are usually provided with a DOS utility
program to select default media type. e.g.
rset8139.exe by Realtek to support those generic
cards. This utility updates the EEPROM byte offset
0x0C, sometimes disabling auto-negotiation.

Those cards will have BMCR register (MII reg 0)
modified.

The existing kernel 2.2.19 rtl8139 driver ignores BMCR
register and reads Link-Partner register for media
type. It may displays a message of "setting
half-duplex" for those cards programmed with 100baseTX
full-duplex...

A possible fix is to check the ANE bit in BMCR
register. If ANE bit is cleared, read selected media
type in BMCD register. Should auto-negotiation be
disabled, we don't need to do runtime auto-sense.

For this purpose, rtl8129_open() is modified. The
attached diff file is based on v1.07 included in Linux
kernel 2.2.19.

Hope it works for others too.

Best Regards,

Bernard Lee


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