82583V Datasheet, PDF (52/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

82583V GbE Controller—Initialization
4.6.3
4.6.3.1
4.6.3.2
Link Setup Mechanisms and Control/Status Bit Summary
PHY Initialization
Refer to the PHY documentation for the initialization and link setup steps. The device
driver uses the MDIC register to initialize the PHY and setup the link.
MAC/PHY Link Setup
This section summarizes the various means of establishing proper MAC/PHY link
setups, differences in MAC CTRL register settings for each mechanism, and the relevant
MAC status bits. The methods are ordered in terms of preference (the first mechanism
being the most preferred).
• MAC settings automatically based on duplex and speed resolved by PHY.
(CTRL.FRCDPLX = 0b, CTRL.FRCSPD = 0b, CTRL.ASDE = 0b)
— CTRL.FD - Don't care; duplex setting is established from PHY's internal
indication to the MAC (FDX) after PHY has auto-negotiated a successful link-up.
— CTRL.SLU - Must be set to 1b by software to enable communications between
MAC and PHY.
— CTRL.RFCE - Must be set by software after reading flow control resolution from
PHY registers.
— CTRL.TFCE - Must be set by software after reading flow control resolution from
PHY registers.
— CTRL.SPEED - Don't care; speed setting is established from PHY's internal
indication to the MAC (SPD_IND) after PHY has auto-negotiated a successful
link-up.
— STATUS.FD - Reflects the actual duplex setting (FDX) negotiated by the PHY
and indicated to the MAC.
— STATUS.LU - Reflects link indication (LINK) from the PHY qualified with
CTRL.SLU (set to 1b).
— STATUS.SPEED - Reflects actual speed setting negotiated by the PHY and
indicated to the MAC (SPD_IND).
• MAC duplex setting automatically based on resolution of PHY, software-
forced MAC/PHY speed. (CTRL.FRCDPLX = 0b, CTRL.FRCSPD = 1b,
CTRL.ASDE = don't care)
— CTRL.FD - Don't care; duplex setting is established from PHY's internal
indication to the MAC (FDX) after PHY has auto-negotiated a successful link-up.
— CTRL.SLU - Must be set to 1b by software to enable communications between
the MAC and PHY.
— CTRL.RFCE - Must be set by software after reading flow control resolution from
PHY registers.
— CTRL.TFCE - Must be set by software after reading flow control resolution from
the PHY registers.
— CTRL.SPEED - Set by software to desired link speed (must match speed setting
of PHY).
— STATUS.FD - Reflects the actual duplex setting (FDX) negotiated by the PHY
and indicated to MAC.
— STATUS.LU - Reflects link indication (LINK) from the PHY qualified with
CTRL.SLU (set to 1b).
— STATUS.SPEED - Reflects MAC forced speed setting written in CTRL.SPEED.
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