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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: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raju Lakkaraju 2016-09-19 15:33:54 +05:30 committed by David S. Miller
parent 1a9234e66e
commit 1a21101d21
1 changed files with 51 additions and 0 deletions
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51
drivers/net/phy/mscc.c
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@ -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;