diff options
author | Oleksij Rempel <o.rempel@pengutronix.de> | 2021-06-07 10:27:22 +0200 |
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committer | David S. Miller <davem@davemloft.net> | 2021-06-07 13:23:02 -0700 |
commit | dde25846925765a88df8964080098174495c1f10 (patch) | |
tree | d5301d81adf588fcf048ddc2ade2342cdeadbd8c /drivers | |
parent | 7e88b11a862afe59ee0c365123ea5fb96a26cb3b (diff) | |
download | linux-stable-dde25846925765a88df8964080098174495c1f10.tar.gz linux-stable-dde25846925765a88df8964080098174495c1f10.tar.bz2 linux-stable-dde25846925765a88df8964080098174495c1f10.zip |
net: usb/phy: asix: add support for ax88772A/C PHYs
Add support for build-in x88772A/C PHYs
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/phy/ax88796b.c | 74 | ||||
-rw-r--r-- | drivers/net/usb/Kconfig | 1 |
2 files changed, 74 insertions, 1 deletions
diff --git a/drivers/net/phy/ax88796b.c b/drivers/net/phy/ax88796b.c index 79bf7ef1fcfd..457896337505 100644 --- a/drivers/net/phy/ax88796b.c +++ b/drivers/net/phy/ax88796b.c @@ -10,6 +10,8 @@ #include <linux/mii.h> #include <linux/phy.h> +#define PHY_ID_ASIX_AX88772A 0x003b1861 +#define PHY_ID_ASIX_AX88772C 0x003b1881 #define PHY_ID_ASIX_AX88796B 0x003b1841 MODULE_DESCRIPTION("Asix PHY driver"); @@ -39,7 +41,75 @@ static int asix_soft_reset(struct phy_device *phydev) return genphy_soft_reset(phydev); } -static struct phy_driver asix_driver[] = { { +/* AX88772A is not working properly with some old switches (NETGEAR EN 108TP): + * after autoneg is done and the link status is reported as active, the MII_LPA + * register is 0. This issue is not reproducible on AX88772C. + */ +static int asix_ax88772a_read_status(struct phy_device *phydev) +{ + int ret, val; + + ret = genphy_update_link(phydev); + if (ret) + return ret; + + if (!phydev->link) + return 0; + + /* If MII_LPA is 0, phy_resolve_aneg_linkmode() will fail to resolve + * linkmode so use MII_BMCR as default values. + */ + val = phy_read(phydev, MII_BMCR); + if (val < 0) + return val; + + if (val & BMCR_SPEED100) + phydev->speed = SPEED_100; + else + phydev->speed = SPEED_10; + + if (val & BMCR_FULLDPLX) + phydev->duplex = DUPLEX_FULL; + else + phydev->duplex = DUPLEX_HALF; + + ret = genphy_read_lpa(phydev); + if (ret < 0) + return ret; + + if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) + phy_resolve_aneg_linkmode(phydev); + + return 0; +} + +static void asix_ax88772a_link_change_notify(struct phy_device *phydev) +{ + /* Reset PHY, otherwise MII_LPA will provide outdated information. + * This issue is reproducible only with some link partner PHYs + */ + if (phydev->state == PHY_NOLINK && phydev->drv->soft_reset) + phydev->drv->soft_reset(phydev); +} + +static struct phy_driver asix_driver[] = { +{ + PHY_ID_MATCH_EXACT(PHY_ID_ASIX_AX88772A), + .name = "Asix Electronics AX88772A", + .flags = PHY_IS_INTERNAL, + .read_status = asix_ax88772a_read_status, + .suspend = genphy_suspend, + .resume = genphy_resume, + .soft_reset = asix_soft_reset, + .link_change_notify = asix_ax88772a_link_change_notify, +}, { + PHY_ID_MATCH_EXACT(PHY_ID_ASIX_AX88772C), + .name = "Asix Electronics AX88772C", + .flags = PHY_IS_INTERNAL, + .suspend = genphy_suspend, + .resume = genphy_resume, + .soft_reset = asix_soft_reset, +}, { .phy_id = PHY_ID_ASIX_AX88796B, .name = "Asix Electronics AX88796B", .phy_id_mask = 0xfffffff0, @@ -50,6 +120,8 @@ static struct phy_driver asix_driver[] = { { module_phy_driver(asix_driver); static struct mdio_device_id __maybe_unused asix_tbl[] = { + { PHY_ID_MATCH_EXACT(PHY_ID_ASIX_AX88772A) }, + { PHY_ID_MATCH_EXACT(PHY_ID_ASIX_AX88772C) }, { PHY_ID_ASIX_AX88796B, 0xfffffff0 }, { } }; diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig index 179308782888..6f7be47974f6 100644 --- a/drivers/net/usb/Kconfig +++ b/drivers/net/usb/Kconfig @@ -164,6 +164,7 @@ config USB_NET_AX8817X depends on USB_USBNET select CRC32 select PHYLIB + select AX88796B_PHY default y help This option adds support for ASIX AX88xxx based USB 2.0 |