Commit dde25846 authored by Oleksij Rempel's avatar Oleksij Rempel Committed by David S. Miller
Browse files

net: usb/phy: asix: add support for ax88772A/C PHYs 



Add support for build-in x88772A/C PHYs

Signed-off-by: default avatarOleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7e88b11a

drivers/net/phy/ax88796b.c

+73 −1
Original line number Original line Diff line number Diff line
@@ -10,6 +10,8 @@ 
#include <linux/mii.h>

#include <linux/mii.h>

#include <linux/phy.h>

#include <linux/phy.h>





#define PHY_ID_ASIX_AX88772A		0x003b1861

#define PHY_ID_ASIX_AX88772C		0x003b1881

#define PHY_ID_ASIX_AX88796B		0x003b1841

#define PHY_ID_ASIX_AX88796B		0x003b1841





MODULE_DESCRIPTION("Asix PHY driver");

MODULE_DESCRIPTION("Asix PHY driver");
@@ -39,7 +41,75 @@ static int asix_soft_reset(struct phy_device *phydev) 
	return genphy_soft_reset(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	/* Reset PHY, otherwise MII_LPA will provide outdated information.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,

	.phy_id		= PHY_ID_ASIX_AX88796B,

	.name		= "Asix Electronics AX88796B",

	.name		= "Asix Electronics AX88796B",

	.phy_id_mask	= 0xfffffff0,

	.phy_id_mask	= 0xfffffff0,
@@ -50,6 +120,8 @@ static struct phy_driver asix_driver[] = { { 
module_phy_driver(asix_driver);

module_phy_driver(asix_driver);





static struct mdio_device_id __maybe_unused asix_tbl[] = {

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 },

	{ PHY_ID_ASIX_AX88796B, 0xfffffff0 },

	{ }

	{ }

};

};

drivers/net/usb/Kconfig

+1 −0
Original line number Original line Diff line number Diff line
@@ -164,6 +164,7 @@ config USB_NET_AX8817X 
	depends on USB_USBNET

	depends on USB_USBNET

	select CRC32

	select CRC32

	select PHYLIB

	select PHYLIB

	select AX88796B_PHY

	default y

	default y

	help

	help

	  This option adds support for ASIX AX88xxx based USB 2.0

	  This option adds support for ASIX AX88xxx based USB 2.0