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net: phy: dp83867: Add lane swapping support in the DP83867 TI's PHY driver

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This patch adds support for enabling or disabling the lane swapping (called
"port mirroring" in PHY's CFG4 register) feature of the DP83867 TI's PHY
device.

One use case is when bootstrap configuration enables this feature (because
of e.g. LED_0 wrong wiring) so then one needs to disable it in software
(at u-boot/Linux).

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lukasz Majewski 2017-02-07 06:20:23 +01:00 committed by David S. Miller
parent 252ae5330d
commit fc6d39c395
1 changed files with 38 additions and 0 deletions
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38
drivers/net/phy/dp83867.c
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@ -32,6 +32,7 @@
#define DP83867_CFG3 0x1e
/* Extended Registers */
#define DP83867_CFG4 0x0031
#define DP83867_RGMIICTL 0x0032
#define DP83867_RGMIIDCTL 0x0086
#define DP83867_IO_MUX_CFG 0x0170
@ -70,11 +71,21 @@
#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0
#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f
/* CFG4 bits */
#define DP83867_CFG4_PORT_MIRROR_EN BIT(0)
enum {
DP83867_PORT_MIRROING_KEEP,
DP83867_PORT_MIRROING_EN,
DP83867_PORT_MIRROING_DIS,
};
struct dp83867_private {
int rx_id_delay;
int tx_id_delay;
int fifo_depth;
int io_impedance;
int port_mirroring;
};
static int dp83867_ack_interrupt(struct phy_device *phydev)
@ -111,6 +122,24 @@ static int dp83867_config_intr(struct phy_device *phydev)
return phy_write(phydev, MII_DP83867_MICR, micr_status);
}
static int dp83867_config_port_mirroring(struct phy_device *phydev)
{
struct dp83867_private *dp83867 =
(struct dp83867_private *)phydev->priv;
u16 val;
val = phy_read_mmd_indirect(phydev, DP83867_CFG4, DP83867_DEVADDR);
if (dp83867->port_mirroring == DP83867_PORT_MIRROING_EN)
val |= DP83867_CFG4_PORT_MIRROR_EN;
else
val &= ~DP83867_CFG4_PORT_MIRROR_EN;
phy_write_mmd_indirect(phydev, DP83867_CFG4, DP83867_DEVADDR, val);
return 0;
}
#ifdef CONFIG_OF_MDIO
static int dp83867_of_init(struct phy_device *phydev)
{
@ -144,6 +173,12 @@ static int dp83867_of_init(struct phy_device *phydev)
phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID))
return ret;
if (of_property_read_bool(of_node, "enet-phy-lane-swap"))
dp83867->port_mirroring = DP83867_PORT_MIRROING_EN;
if (of_property_read_bool(of_node, "enet-phy-lane-no-swap"))
dp83867->port_mirroring = DP83867_PORT_MIRROING_DIS;
return of_property_read_u32(of_node, "ti,fifo-depth",
&dp83867->fifo_depth);
}
@ -228,6 +263,9 @@ static int dp83867_config_init(struct phy_device *phydev)
phy_write(phydev, DP83867_CFG3, val);
}
if (dp83867->port_mirroring != DP83867_PORT_MIRROING_KEEP)
dp83867_config_port_mirroring(phydev);
return 0;
}