[PATCH] net: phy: DP83811: Add support for the phy

[Dan Murphy]

Add support for the DP83811 phy by extending
the DP83822 driver to recognize the PHY IDs.

The DP83811 supports both rgmii and sgmii interfaces.
There are 2 part numbers for this the DP83811R does not
reliably support the SGMII interface but the DP83811S will.

There is not a way to differentiate these parts from the
hardware or register set.  So this is controlled via the DT
to indicate which phy mode is required.  Or the part can be
strapped to a certain interface.

Data sheet can be found here:
http://www.ti.com/product/DP83TC811S-Q1/description
http://www.ti.com/product/DP83TC811R-Q1/description

Signed-off-by: Dan Murphy <dmurphy@xxxxxx>
---
 drivers/net/phy/dp83822.c | 42 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 39 insertions(+), 3 deletions(-)

diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c
index 6e8a2a4f3a6e..5c379ff25dac 100644
--- a/drivers/net/phy/dp83822.c
+++ b/drivers/net/phy/dp83822.c
@@ -23,8 +23,10 @@
 #include <linux/netdevice.h>
 
 #define DP83822_PHY_ID	        0x2000a240
+#define DP83811_PHY_ID		0x2000a253
 #define DP83822_DEVADDR		0x1f
 
+#define MII_DP83811_SGMII_CTRL	0x09
 #define MII_DP83822_PHYSCR	0x11
 #define MII_DP83822_MISR1	0x12
 #define MII_DP83822_MISR2	0x13
@@ -79,6 +81,13 @@
 #define DP83822_WOL_INDICATION_SEL BIT(8)
 #define DP83822_WOL_CLR_INDICATION BIT(11)
 
+/* DP83811 SGMII CTRL bits */
+#define DP83811_TDR_AUTO		BIT(8)
+#define DP83811_SGMII_EN		BIT(12)
+#define DP83811_SGMII_AUTO_NEG_EN	BIT(13)
+#define DP83811_SGMII_TX_ERR_DIS	BIT(14)
+#define DP83811_SGMII_SOFT_RESET	BIT(15)
+
 static int dp83822_ack_interrupt(struct phy_device *phydev)
 {
 	int err;
@@ -267,6 +276,17 @@ static int dp83822_config_init(struct phy_device *phydev)
 	if (err < 0)
 		return err;
 
+	if ((phydev->interface == PHY_INTERFACE_MODE_SGMII &&
+	     phydev->phy_id == DP83811_PHY_ID)) {
+		value = phy_read(phydev, MII_DP83811_SGMII_CTRL);
+		if (!(value & DP83811_SGMII_EN)) {
+			err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
+					(DP83811_SGMII_EN | value));
+			if (err < 0)
+				return err;
+		}
+	}
+
 	value = DP83822_WOL_MAGIC_EN | DP83822_WOL_SECURE_ON | DP83822_WOL_EN;
 
 	return phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG,
@@ -328,15 +348,31 @@ static struct phy_driver dp83822_driver[] = {
 		.suspend = dp83822_suspend,
 		.resume = dp83822_resume,
 	 },
+	{
+		.phy_id = DP83811_PHY_ID,
+		.phy_id_mask = 0xfffffff0,
+		.name = "TI DP83811",
+		.features = PHY_BASIC_FEATURES,
+		.flags = PHY_HAS_INTERRUPT,
+		.config_init = genphy_config_init,
+		.soft_reset = dp83822_phy_reset,
+		.get_wol = dp83822_get_wol,
+		.set_wol = dp83822_set_wol,
+		.ack_interrupt = dp83822_ack_interrupt,
+		.config_intr = dp83822_config_intr,
+		.suspend = dp83822_suspend,
+		.resume = dp83822_resume,
+	 },
 };
 module_phy_driver(dp83822_driver);
 
 static struct mdio_device_id __maybe_unused dp83822_tbl[] = {
-	{ DP83822_PHY_ID, 0xfffffff0 },
-	{ },
+	{DP83822_PHY_ID, 0xfffffff0},
+	{DP83811_PHY_ID, 0xfffffff0},
+	{}
 };
 MODULE_DEVICE_TABLE(mdio, dp83822_tbl);
 
-MODULE_DESCRIPTION("Texas Instruments DP83822 PHY driver");
+MODULE_DESCRIPTION("Texas Instruments DP83811/22 PHY driver");
 MODULE_AUTHOR("Dan Murphy <dmurphy@xxxxxx");
 MODULE_LICENSE("GPL");
-- 
2.17.0.252.gfe0a9eaf3