diff options
| author |   Ioana Ciornei <ioana.ciornei@nxp.com> | 2020-08-30 11:33:58 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-08-31 12:52:33 -0700 |
| commit | afd6220999d4932616322f8a893371f8d0567a2a (patch) | |
| tree | 848efcc4125ae5e61aa6988c2382ec0762b3d2a0 /drivers/net/phy/phylink.c | |
| parent | net/wan/fsl_ucc_hdlc: Add MODULE_DESCRIPTION (diff) | |
| download | linux-dev-afd6220999d4932616322f8a893371f8d0567a2a.tar.xz linux-dev-afd6220999d4932616322f8a893371f8d0567a2a.zip | |
net: phylink: add helper function to decode USXGMII word
With the new addition of the USXGMII link partner ability constants we
can now introduce a phylink helper that decodes the USXGMII word and
populates the appropriate fields in the phylink_link_state structure
based on them.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/phylink.c')
| -rw-r--r-- | drivers/net/phy/phylink.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 5e4cb12972eb..4adc904ad5c1 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -2321,6 +2321,49 @@ static void phylink_decode_sgmii_word(struct phylink_link_state *state, } /** + * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS + * @state: a pointer to a struct phylink_link_state. + * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word + * + * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation + * code word. Decode the USXGMII code word and populate the corresponding fields + * (speed, duplex) into the phylink_link_state structure. + */ +void phylink_decode_usxgmii_word(struct phylink_link_state *state, + uint16_t lpa) +{ + switch (lpa & MDIO_USXGMII_SPD_MASK) { + case MDIO_USXGMII_10: + state->speed = SPEED_10; + break; + case MDIO_USXGMII_100: + state->speed = SPEED_100; + break; + case MDIO_USXGMII_1000: + state->speed = SPEED_1000; + break; + case MDIO_USXGMII_2500: + state->speed = SPEED_2500; + break; + case MDIO_USXGMII_5000: + state->speed = SPEED_5000; + break; + case MDIO_USXGMII_10G: + state->speed = SPEED_10000; + break; + default: + state->link = false; + return; + } + + if (lpa & MDIO_USXGMII_FULL_DUPLEX) + state->duplex = DUPLEX_FULL; + else + state->duplex = DUPLEX_HALF; +} +EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word); + +/** * phylink_mii_c22_pcs_get_state() - read the MAC PCS state * @pcs: a pointer to a &struct mdio_device. * @state: a pointer to a &struct phylink_link_state. |