Commit 870a1dbc authored by Oleksij Rempel's avatar Oleksij Rempel Committed by Paolo Abeni
Browse files

net: phy: microchip: lan937x: add support for 100BaseTX PHY 



Add support of 100BaseTX PHY build in to LAN9371 and LAN9372 switches.

Signed-off-by: default avatarOleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: default avatarFlorian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: default avatarMichal Kubiak <michal.kubiak@intel.com>
Acked-by: default avatarArun Ramadoss <arun.ramadoss@microchip.com>
Link: https://patch.msgid.link/20240706154201.1456098-1-o.rempel@pengutronix.de


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 0787ab20

drivers/net/phy/microchip.c

+125 −1
Original line number Diff line number Diff line
@@ -12,8 +12,14 @@ 
#include <linux/of.h>

#include <dt-bindings/net/microchip-lan78xx.h>



#define PHY_ID_LAN937X_TX			0x0007c190



#define LAN937X_MODE_CTRL_STATUS_REG		0x11

#define LAN937X_AUTOMDIX_EN			BIT(7)

#define LAN937X_MDI_MODE			BIT(6)



#define DRIVER_AUTHOR	"WOOJUNG HUH <woojung.huh@microchip.com>"

#define DRIVER_DESC	"Microchip LAN88XX PHY driver"

#define DRIVER_DESC	"Microchip LAN88XX/LAN937X TX PHY driver"



struct lan88xx_priv {

	int	chip_id;
@@ -373,6 +379,115 @@ static void lan88xx_link_change_notify(struct phy_device *phydev) 
	}

}



/**

 * lan937x_tx_read_mdix_status - Read the MDIX status for the LAN937x TX PHY.

 * @phydev: Pointer to the phy_device structure.

 *

 * This function reads the MDIX status of the LAN937x TX PHY and sets the

 * mdix_ctrl and mdix fields of the phy_device structure accordingly.

 * Note that MDIX status is not supported in AUTO mode, and will be set

 * to invalid in such cases.

 *

 * Return: 0 on success, a negative error code on failure.

 */

static int lan937x_tx_read_mdix_status(struct phy_device *phydev)

{

	int ret;



	ret = phy_read(phydev, LAN937X_MODE_CTRL_STATUS_REG);

	if (ret < 0)

		return ret;



	if (ret & LAN937X_AUTOMDIX_EN) {

		phydev->mdix_ctrl = ETH_TP_MDI_AUTO;

		/* MDI/MDIX status is unknown */

		phydev->mdix = ETH_TP_MDI_INVALID;

	} else if (ret & LAN937X_MDI_MODE) {

		phydev->mdix_ctrl = ETH_TP_MDI_X;

		phydev->mdix = ETH_TP_MDI_X;

	} else {

		phydev->mdix_ctrl = ETH_TP_MDI;

		phydev->mdix = ETH_TP_MDI;

	}



	return 0;

}



/**

 * lan937x_tx_read_status - Read the status for the LAN937x TX PHY.

 * @phydev: Pointer to the phy_device structure.

 *

 * This function reads the status of the LAN937x TX PHY and updates the

 * phy_device structure accordingly.

 *

 * Return: 0 on success, a negative error code on failure.

 */

static int lan937x_tx_read_status(struct phy_device *phydev)

{

	int ret;



	ret = genphy_read_status(phydev);

	if (ret < 0)

		return ret;



	return lan937x_tx_read_mdix_status(phydev);

}



/**

 * lan937x_tx_set_mdix - Set the MDIX mode for the LAN937x TX PHY.

 * @phydev: Pointer to the phy_device structure.

 *

 * This function configures the MDIX mode of the LAN937x TX PHY based on the

 * mdix_ctrl field of the phy_device structure. The MDIX mode can be set to

 * MDI (straight-through), MDIX (crossover), or AUTO (auto-MDIX). If the mode

 * is not recognized, it returns 0 without making any changes.

 *

 * Return: 0 on success, a negative error code on failure.

 */

static int lan937x_tx_set_mdix(struct phy_device *phydev)

{

	u16 val;



	switch (phydev->mdix_ctrl) {

	case ETH_TP_MDI:

		val = 0;

		break;

	case ETH_TP_MDI_X:

		val = LAN937X_MDI_MODE;

		break;

	case ETH_TP_MDI_AUTO:

		val = LAN937X_AUTOMDIX_EN;

		break;

	default:

		return 0;

	}



	return phy_modify(phydev, LAN937X_MODE_CTRL_STATUS_REG,

			  LAN937X_AUTOMDIX_EN | LAN937X_MDI_MODE, val);

}



/**

 * lan937x_tx_config_aneg - Configure auto-negotiation and fixed modes for the

 *                          LAN937x TX PHY.

 * @phydev: Pointer to the phy_device structure.

 *

 * This function configures the MDIX mode for the LAN937x TX PHY and then

 * proceeds to configure the auto-negotiation or fixed mode settings

 * based on the phy_device structure.

 *

 * Return: 0 on success, a negative error code on failure.

 */

static int lan937x_tx_config_aneg(struct phy_device *phydev)

{

	int ret;



	ret = lan937x_tx_set_mdix(phydev);

	if (ret < 0)

		return ret;



	return genphy_config_aneg(phydev);

}



static struct phy_driver microchip_phy_driver[] = {

{

	.phy_id		= 0x0007c132,
@@ -400,12 +515,21 @@ static struct phy_driver microchip_phy_driver[] = { 
	.set_wol	= lan88xx_set_wol,

	.read_page	= lan88xx_read_page,

	.write_page	= lan88xx_write_page,

},

{

	PHY_ID_MATCH_MODEL(PHY_ID_LAN937X_TX),

	.name		= "Microchip LAN937x TX",

	.suspend	= genphy_suspend,

	.resume		= genphy_resume,

	.config_aneg	= lan937x_tx_config_aneg,

	.read_status	= lan937x_tx_read_status,

} };



module_phy_driver(microchip_phy_driver);



static struct mdio_device_id __maybe_unused microchip_tbl[] = {

	{ 0x0007c132, 0xfffffff2 },

	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN937X_TX) },

	{ }

};