Commit e4f9ba64 authored by Kavya Sree Kotagiri's avatar Kavya Sree Kotagiri Committed by David S. Miller

net: phy: mscc: add support for VSC8514 PHY.

The VSC8514 PHY is a 4-ports PHY that is 10/100/1000BASE-T, 100BASE-FX,
1000BASE-X, can communicate with the MAC via QSGMII.
The MAC interface protocol for each port within QSGMII can
be either 1000BASE-X or SGMII, if the QSGMII MAC that the VSC8514 is
connecting to supports this functionality.
VSC8514 also supports SGMII MAC-side autonegotiation on each individual
port, downshifting, can set the blinking pattern of each of its 4 LEDs,
SyncE, 1000BASE-T Ring Resiliency as well as HP Auto-MDIX detection.

This adds support for 10BASE-T, 100BASE-TX, and 1000BASE-T,
QSGMII link with the MAC, downshifting, HP Auto-MDIX detection
and blinking pattern for its 4 LEDs.

The GPIO register bank is a set of registers that are common to all PHYs
in the package. So any modification in any register of this bank affects
all PHYs of the package.

If the PHYs haven't been reset before booting the Linux kernel and were
configured to use interrupts for e.g. link status updates, it is
required to clear the interrupts mask register of all PHYs before being
able to use interrupts with any PHY. The first PHY of the package that
will be init will take care of clearing all PHYs interrupts mask
registers. Thus, we need to keep track of the init sequence in the
package, if it's already been done or if it's to be done.

Most of the init sequence of a PHY of the package is common to all PHYs
in the package, thus we use the SMI broadcast feature which enables us
to propagate a write in one register of one PHY to all PHYs in the same
package.
Signed-off-by: default avatarKavya Sree Kotagiri <kavyasree.kotagiri@microchip.com>
Signed-off-by: default avatarQuentin Schulz <quentin.schulz@bootlin.com>
Co-developed-by: default avatarQuentin Schulz <quentin.schulz@bootlin.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a93f7fe1
......@@ -408,7 +408,7 @@ config MICROCHIP_T1_PHY
config MICROSEMI_PHY
tristate "Microsemi PHYs"
---help---
Currently supports VSC8530, VSC8531, VSC8540 and VSC8541 PHYs
Currently supports VSC8514, VSC8530, VSC8531, VSC8540 and VSC8541 PHYs
config NATIONAL_PHY
tristate "National Semiconductor PHYs"
......
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