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authorMatt Carlson <mcarlson@broadcom.com>2008-05-02 19:49:29 -0400
committerDavid S. Miller <davem@davemloft.net>2008-05-02 19:49:29 -0400
commit7c5026aa9b81dd45df8d3f4e0be73e485976a8b6 (patch)
tree09b0e14566d630f1b8d3225b6fda0c2a862519e9 /drivers/char/epca.c
parent109115e1991824b88306b374b763d6857b292aeb (diff)
tg3: Add link state reporting to UMP firmware
All variants of the 5714, 5715, and 5780 offer a feature called the "Universal Management Port". This feature is implemented in firmware and is largely transparent to the driver, except... It turns out that the UMP firmware needs to know the current status of the link. Because the firmware cannot touch the PHY registers while the driver is in control of the device, it needs the driver to report link status changes through an additional handshaking mechanism. Without this handshake, it has been observed in the field that the UMP firmware will not operate correctly. This patch implements the new handshake with the UMP firmware. Since the handshake uses the same mechanism ASF heartbeats use, code was added to detect and wait for completion of a pending previous event. Signed-off-by: Matt Carlson <mcarlson@broadcom.com> Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/char/epca.c')
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