net/phy: add VSC8574 support

The VSC8574 is a quad-port Gigabit Ethernet transceiver with four SerDes
interfaces for quad-port dual media capability. This driver supports SGMII
and QSGMII MAC mode. For now SGMII mode is tested.

Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

diff --git a/drivers/net/phy/vitesse.c b/drivers/net/phy/vitesse.c
index 6c5cb99..c283d82 100644 (file)
--- a/drivers/net/phy/vitesse.c
+++ b/drivers/net/phy/vitesse.c
@@ -48,6 +48,19 @@
 #define MIIM_VSC8601_SKEW_CTRL         0x1c
 
 #define PHY_EXT_PAGE_ACCESS    0x1f
+#define PHY_EXT_PAGE_ACCESS_GENERAL    0x10
+#define PHY_EXT_PAGE_ACCESS_EXTENDED3  0x3
+
+/* Vitesse VSC8574 control register */
+#define MIIM_VSC8574_MAC_SERDES_CON    0x10
+#define MIIM_VSC8574_MAC_SERDES_ANEG   0x80
+#define MIIM_VSC8574_GENERAL18         0x12
+#define MIIM_VSC8574_GENERAL19         0x13
+
+/* Vitesse VSC8574 gerenal purpose register 18 */
+#define MIIM_VSC8574_18G_SGMII         0x80f0
+#define MIIM_VSC8574_18G_QSGMII                0x80e0
+#define MIIM_VSC8574_18G_CMDSTAT       0x8000
 
 /* CIS8201 */
 static int vitesse_config(struct phy_device *phydev)
@@ -145,6 +158,49 @@ static int vsc8601_config(struct phy_device *phydev)
        return 0;
 }
 
+static int vsc8574_config(struct phy_device *phydev)
+{
+       u32 val;
+       /* configure regiser 19G for MAC */
+       phy_write(phydev, MDIO_DEVAD_NONE, PHY_EXT_PAGE_ACCESS,
+                 PHY_EXT_PAGE_ACCESS_GENERAL);
+
+       val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_VSC8574_GENERAL19);
+       if (phydev->interface == PHY_INTERFACE_MODE_QSGMII) {
+               /* set bit 15:14 to '01' for QSGMII mode */
+               val = (val & 0x3fff) | (1 << 14);
+               phy_write(phydev, MDIO_DEVAD_NONE,
+                         MIIM_VSC8574_GENERAL19, val);
+               /* Enable 4 ports MAC QSGMII */
+               phy_write(phydev, MDIO_DEVAD_NONE, MIIM_VSC8574_GENERAL18,
+                         MIIM_VSC8574_18G_QSGMII);
+       } else {
+               /* set bit 15:14 to '00' for SGMII mode */
+               val = val & 0x3fff;
+               phy_write(phydev, MDIO_DEVAD_NONE, MIIM_VSC8574_GENERAL19, val);
+               /* Enable 4 ports MAC SGMII */
+               phy_write(phydev, MDIO_DEVAD_NONE, MIIM_VSC8574_GENERAL18,
+                         MIIM_VSC8574_18G_SGMII);
+       }
+       val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_VSC8574_GENERAL18);
+       /* When bit 15 is cleared the command has completed */
+       while (val & MIIM_VSC8574_18G_CMDSTAT)
+               val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_VSC8574_GENERAL18);
+
+       /* Enable Serdes Auto-negotiation */
+       phy_write(phydev, MDIO_DEVAD_NONE, PHY_EXT_PAGE_ACCESS,
+                 PHY_EXT_PAGE_ACCESS_EXTENDED3);
+       val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_VSC8574_MAC_SERDES_CON);
+       val = val | MIIM_VSC8574_MAC_SERDES_ANEG;
+       phy_write(phydev, MDIO_DEVAD_NONE, MIIM_VSC8574_MAC_SERDES_CON, val);
+
+       phy_write(phydev, MDIO_DEVAD_NONE, PHY_EXT_PAGE_ACCESS, 0);
+
+       genphy_config_aneg(phydev);
+
+       return 0;
+}
+
 static struct phy_driver VSC8211_driver = {
        .name   = "Vitesse VSC8211",
        .uid    = 0xfc4b0,
@@ -185,6 +241,16 @@ static struct phy_driver VSC8234_driver = {
        .shutdown = &genphy_shutdown,
 };
 
+static struct phy_driver VSC8574_driver = {
+       .name = "Vitesse VSC8574",
+       .uid = 0x704a0,
+       .mask = 0xffff0,
+       .features = PHY_GBIT_FEATURES,
+       .config = &vsc8574_config,
+       .startup = &vitesse_startup,
+       .shutdown = &genphy_shutdown,
+};
+
 static struct phy_driver VSC8601_driver = {
        .name = "Vitesse VSC8601",
        .uid = 0x70420,
@@ -244,6 +310,7 @@ int phy_vitesse_init(void)
        phy_register(&VSC8244_driver);
        phy_register(&VSC8211_driver);
        phy_register(&VSC8221_driver);
+       phy_register(&VSC8574_driver);
        phy_register(&VSC8662_driver);
        phy_register(&cis8201_driver);
        phy_register(&cis8204_driver);

diff --git a/include/phy.h b/include/phy.h
index 58ca273..44d5eaf 100644 (file)
--- a/include/phy.h
+++ b/include/phy.h
@@ -52,6 +52,7 @@ typedef enum {
        PHY_INTERFACE_MODE_MII,
        PHY_INTERFACE_MODE_GMII,
        PHY_INTERFACE_MODE_SGMII,
+       PHY_INTERFACE_MODE_QSGMII,
        PHY_INTERFACE_MODE_TBI,
        PHY_INTERFACE_MODE_RMII,
        PHY_INTERFACE_MODE_RGMII,
@@ -67,6 +68,7 @@ static const char *phy_interface_strings[] = {
        [PHY_INTERFACE_MODE_MII]                = "mii",
        [PHY_INTERFACE_MODE_GMII]               = "gmii",
        [PHY_INTERFACE_MODE_SGMII]              = "sgmii",
+       [PHY_INTERFACE_MODE_QSGMII]             = "qsgmii",
        [PHY_INTERFACE_MODE_TBI]                = "tbi",
        [PHY_INTERFACE_MODE_RMII]               = "rmii",
        [PHY_INTERFACE_MODE_RGMII]              = "rgmii",