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Commit 1a21101d authored by Raju Lakkaraju's avatar Raju Lakkaraju Committed by David S. Miller
Browse files

net: phy: Add MAC-IF driver for Microsemi PHYs. 



All the review comments updated and resending for review.

This is MAC interface feature.
Microsemi PHY can support RGMII, RMII or GMII/MII interface between MAC and PHY.
MAC-IF function program the right value based on Device tree configuration.

Tested on Beaglebone Black with VSC 8531 PHY.

Signed-off-by: default avatarRaju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1a9234e6

drivers/net/phy/mscc.c

+51 −0
Original line number Diff line number Diff line
@@ -23,6 +23,16 @@ enum rgmii_rx_clock_delay { 
	RGMII_RX_CLK_DELAY_3_4_NS = 7

};



/* Microsemi VSC85xx PHY registers */

/* IEEE 802. Std Registers */

#define MSCC_PHY_EXT_PHY_CNTL_1           23

#define MAC_IF_SELECTION_MASK             0x1800

#define MAC_IF_SELECTION_GMII             0

#define MAC_IF_SELECTION_RMII             1

#define MAC_IF_SELECTION_RGMII            2

#define MAC_IF_SELECTION_POS              11

#define FAR_END_LOOPBACK_MODE_MASK        0x0008



#define MII_VSC85XX_INT_MASK		  25

#define MII_VSC85XX_INT_MASK_MASK	  0xa000

#define MII_VSC85XX_INT_STATUS		  26
@@ -48,6 +58,42 @@ static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page) 
	return rc;

}



static int vsc85xx_mac_if_set(struct phy_device *phydev,

			      phy_interface_t interface)

{

	int rc;

	u16 reg_val;



	mutex_lock(&phydev->lock);

	reg_val = phy_read(phydev, MSCC_PHY_EXT_PHY_CNTL_1);

	reg_val &= ~(MAC_IF_SELECTION_MASK);

	switch (interface) {

	case PHY_INTERFACE_MODE_RGMII:

		reg_val |= (MAC_IF_SELECTION_RGMII << MAC_IF_SELECTION_POS);

		break;

	case PHY_INTERFACE_MODE_RMII:

		reg_val |= (MAC_IF_SELECTION_RMII << MAC_IF_SELECTION_POS);

		break;

	case PHY_INTERFACE_MODE_MII:

	case PHY_INTERFACE_MODE_GMII:

		reg_val |= (MAC_IF_SELECTION_GMII << MAC_IF_SELECTION_POS);

		break;

	default:

		rc = -EINVAL;

		goto out_unlock;

	}

	rc = phy_write(phydev, MSCC_PHY_EXT_PHY_CNTL_1, reg_val);

	if (rc != 0)

		goto out_unlock;



	rc = genphy_soft_reset(phydev);



out_unlock:

	mutex_unlock(&phydev->lock);



	return rc;

}



static int vsc85xx_default_config(struct phy_device *phydev)

{

	int rc;
@@ -77,6 +123,11 @@ static int vsc85xx_config_init(struct phy_device *phydev) 
	rc = vsc85xx_default_config(phydev);

	if (rc)

		return rc;



	rc = vsc85xx_mac_if_set(phydev, phydev->interface);

	if (rc)

		return rc;



	rc = genphy_config_init(phydev);



	return rc;