diff options
Diffstat (limited to 'drivers/net/phy/phylink.c')
| -rw-r--r-- | drivers/net/phy/phylink.c | 104 |
1 files changed, 60 insertions, 44 deletions
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index da17b874a5e7..2d201a795775 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -2815,31 +2815,22 @@ void phylink_decode_usxgmii_word(struct phylink_link_state *state, 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. + * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers * @state: a pointer to a &struct phylink_link_state. + * @bmsr: The value of the %MII_BMSR register + * @lpa: The value of the %MII_LPA register * * Helper for MAC PCS supporting the 802.3 clause 22 register set for * clause 37 negotiation and/or SGMII control. * - * Read the MAC PCS state from the MII device configured in @config and - * parse the Clause 37 or Cisco SGMII link partner negotiation word into - * the phylink @state structure. This is suitable to be directly plugged - * into the mac_pcs_get_state() member of the struct phylink_mac_ops - * structure. + * Parse the Clause 37 or Cisco SGMII link partner negotiation word into + * the phylink @state structure. This is suitable to be used for implementing + * the mac_pcs_get_state() member of the struct phylink_mac_ops structure if + * accessing @bmsr and @lpa cannot be done with MDIO directly. */ -void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, - struct phylink_link_state *state) +void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state, + u16 bmsr, u16 lpa) { - int bmsr, lpa; - - bmsr = mdiodev_read(pcs, MII_BMSR); - lpa = mdiodev_read(pcs, MII_LPA); - if (bmsr < 0 || lpa < 0) { - state->link = false; - return; - } - state->link = !!(bmsr & BMSR_LSTATUS); state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE); /* If there is no link or autonegotiation is disabled, the LP advertisement @@ -2867,28 +2858,54 @@ void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, break; } } +EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state); + +/** + * 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. + * + * Helper for MAC PCS supporting the 802.3 clause 22 register set for + * clause 37 negotiation and/or SGMII control. + * + * Read the MAC PCS state from the MII device configured in @config and + * parse the Clause 37 or Cisco SGMII link partner negotiation word into + * the phylink @state structure. This is suitable to be directly plugged + * into the mac_pcs_get_state() member of the struct phylink_mac_ops + * structure. + */ +void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs, + struct phylink_link_state *state) +{ + int bmsr, lpa; + + bmsr = mdiodev_read(pcs, MII_BMSR); + lpa = mdiodev_read(pcs, MII_LPA); + if (bmsr < 0 || lpa < 0) { + state->link = false; + return; + } + + phylink_mii_c22_pcs_decode_state(state, bmsr, lpa); +} EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state); /** - * phylink_mii_c22_pcs_set_advertisement() - configure the clause 37 PCS + * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS * advertisement - * @pcs: a pointer to a &struct mdio_device. * @interface: the PHY interface mode being configured * @advertising: the ethtool advertisement mask * * Helper for MAC PCS supporting the 802.3 clause 22 register set for * clause 37 negotiation and/or SGMII control. * - * Configure the clause 37 PCS advertisement as specified by @state. This - * does not trigger a renegotiation; phylink will do that via the - * mac_an_restart() method of the struct phylink_mac_ops structure. + * Encode the clause 37 PCS advertisement as specified by @interface and + * @advertising. * - * Returns negative error code on failure to configure the advertisement, - * zero if no change has been made, or one if the advertisement has changed. + * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed. */ -int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs, - phy_interface_t interface, - const unsigned long *advertising) +int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface, + const unsigned long *advertising) { u16 adv; @@ -2902,18 +2919,15 @@ int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs, if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising)) adv |= ADVERTISE_1000XPSE_ASYM; - - return mdiodev_modify_changed(pcs, MII_ADVERTISE, 0xffff, adv); - + return adv; case PHY_INTERFACE_MODE_SGMII: - return mdiodev_modify_changed(pcs, MII_ADVERTISE, 0xffff, 0x0001); - + return 0x0001; default: /* Nothing to do for other modes */ - return 0; + return -EINVAL; } } -EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement); +EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement); /** * phylink_mii_c22_pcs_config() - configure clause 22 PCS @@ -2931,16 +2945,18 @@ int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, phy_interface_t interface, const unsigned long *advertising) { - bool changed; + bool changed = 0; u16 bmcr; - int ret; + int ret, adv; - ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface, - advertising); - if (ret < 0) - return ret; - - changed = ret > 0; + adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising); + if (adv >= 0) { + ret = mdiobus_modify_changed(pcs->bus, pcs->addr, + MII_ADVERTISE, 0xffff, adv); + if (ret < 0) + return ret; + changed = ret; + } /* Ensure ISOLATE bit is disabled */ if (mode == MLO_AN_INBAND && @@ -2953,7 +2969,7 @@ int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode, if (ret < 0) return ret; - return changed ? 1 : 0; + return changed; } EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config); |