net: add micrel KSZ8873MLL switch support

this will allow to detect the link between the switch and the soc

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 2165d5f..b983596 100644 (file)
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -127,6 +127,39 @@ static int ks8051_config_init(struct phy_device *phydev)
        return 0;
 }
 
+#define KSZ8873MLL_GLOBAL_CONTROL_4    0x06
+#define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX     (1 << 6)
+#define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED      (1 << 4)
+int ksz8873mll_read_status(struct phy_device *phydev)
+{
+       int regval;
+
+       /* dummy read */
+       regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
+
+       regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
+
+       if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX)
+               phydev->duplex = DUPLEX_HALF;
+       else
+               phydev->duplex = DUPLEX_FULL;
+
+       if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_SPEED)
+               phydev->speed = SPEED_10;
+       else
+               phydev->speed = SPEED_100;
+
+       phydev->link = 1;
+       phydev->pause = phydev->asym_pause = 0;
+
+       return 0;
+}
+
+static int ksz8873mll_config_aneg(struct phy_device *phydev)
+{
+       return 0;
+}
+
 static struct phy_driver ksphy_driver[] = {
 {
        .phy_id         = PHY_ID_KS8737,
@@ -204,6 +237,16 @@ static struct phy_driver ksphy_driver[] = {
        .ack_interrupt  = kszphy_ack_interrupt,
        .config_intr    = ksz9021_config_intr,
        .driver         = { .owner = THIS_MODULE, },
+}, {
+       .phy_id         = PHY_ID_KSZ8873MLL,
+       .phy_id_mask    = 0x00fffff0,
+       .name           = "Micrel KSZ8873MLL Switch",
+       .features       = (SUPPORTED_Pause | SUPPORTED_Asym_Pause),
+       .flags          = PHY_HAS_MAGICANEG,
+       .config_init    = kszphy_config_init,
+       .config_aneg    = ksz8873mll_config_aneg,
+       .read_status    = ksz8873mll_read_status,
+       .driver         = { .owner = THIS_MODULE, },
 } };
 
 static int __init ksphy_init(void)
@@ -232,6 +275,7 @@ static struct mdio_device_id __maybe_unused micrel_tbl[] = {
        { PHY_ID_KSZ8021, 0x00ffffff },
        { PHY_ID_KSZ8041, 0x00fffff0 },
        { PHY_ID_KSZ8051, 0x00fffff0 },
+       { PHY_ID_KSZ8873MLL, 0x00fffff0 },
        { }
 };
 

diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h
index de20120..adfe8c0 100644 (file)
--- a/include/linux/micrel_phy.h
+++ b/include/linux/micrel_phy.h
@@ -15,6 +15,7 @@
 
 #define MICREL_PHY_ID_MASK     0x00fffff0
 
+#define PHY_ID_KSZ8873MLL      0x000e7237
 #define PHY_ID_KSZ9021         0x00221610
 #define PHY_ID_KS8737          0x00221720
 #define PHY_ID_KSZ8021         0x00221555