These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / net / phy / microchip.c

diff --git a/kernel/drivers/net/phy/microchip.c b/kernel/drivers/net/phy/microchip.c
new file mode 100644 (file)
index 0000000..c0a20eb
--- /dev/null
+++ b/kernel/drivers/net/phy/microchip.c
@@ -0,0 +1,148 @@
+/*
+ * Copyright (C) 2015 Microchip Technology
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+#include <linux/microchipphy.h>
+
+#define DRIVER_AUTHOR  "WOOJUNG HUH <woojung.huh@microchip.com>"
+#define DRIVER_DESC    "Microchip LAN88XX PHY driver"
+
+struct lan88xx_priv {
+       int     chip_id;
+       int     chip_rev;
+       __u32   wolopts;
+};
+
+static int lan88xx_phy_config_intr(struct phy_device *phydev)
+{
+       int rc;
+
+       if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+               /* unmask all source and clear them before enable */
+               rc = phy_write(phydev, LAN88XX_INT_MASK, 0x7FFF);
+               rc = phy_read(phydev, LAN88XX_INT_STS);
+               rc = phy_write(phydev, LAN88XX_INT_MASK,
+                              LAN88XX_INT_MASK_MDINTPIN_EN_ |
+                              LAN88XX_INT_MASK_LINK_CHANGE_);
+       } else {
+               rc = phy_write(phydev, LAN88XX_INT_MASK, 0);
+       }
+
+       return rc < 0 ? rc : 0;
+}
+
+static int lan88xx_phy_ack_interrupt(struct phy_device *phydev)
+{
+       int rc = phy_read(phydev, LAN88XX_INT_STS);
+
+       return rc < 0 ? rc : 0;
+}
+
+int lan88xx_suspend(struct phy_device *phydev)
+{
+       struct lan88xx_priv *priv = phydev->priv;
+
+       /* do not power down PHY when WOL is enabled */
+       if (!priv->wolopts)
+               genphy_suspend(phydev);
+
+       return 0;
+}
+
+static int lan88xx_probe(struct phy_device *phydev)
+{
+       struct device *dev = &phydev->dev;
+       struct lan88xx_priv *priv;
+
+       priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+       if (!priv)
+               return -ENOMEM;
+
+       priv->wolopts = 0;
+
+       /* these values can be used to identify internal PHY */
+       priv->chip_id = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_ID,
+                                             3, phydev->addr);
+       priv->chip_rev = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_REV,
+                                              3, phydev->addr);
+
+       phydev->priv = priv;
+
+       return 0;
+}
+
+static void lan88xx_remove(struct phy_device *phydev)
+{
+       struct device *dev = &phydev->dev;
+       struct lan88xx_priv *priv = phydev->priv;
+
+       if (priv)
+               devm_kfree(dev, priv);
+}
+
+static int lan88xx_set_wol(struct phy_device *phydev,
+                          struct ethtool_wolinfo *wol)
+{
+       struct lan88xx_priv *priv = phydev->priv;
+
+       priv->wolopts = wol->wolopts;
+
+       return 0;
+}
+
+static struct phy_driver microchip_phy_driver[] = {
+{
+       .phy_id         = 0x0007c130,
+       .phy_id_mask    = 0xfffffff0,
+       .name           = "Microchip LAN88xx",
+
+       .features       = (PHY_GBIT_FEATURES |
+                          SUPPORTED_Pause | SUPPORTED_Asym_Pause),
+       .flags          = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
+
+       .probe          = lan88xx_probe,
+       .remove         = lan88xx_remove,
+
+       .config_init    = genphy_config_init,
+       .config_aneg    = genphy_config_aneg,
+       .read_status    = genphy_read_status,
+
+       .ack_interrupt  = lan88xx_phy_ack_interrupt,
+       .config_intr    = lan88xx_phy_config_intr,
+
+       .suspend        = lan88xx_suspend,
+       .resume         = genphy_resume,
+       .set_wol        = lan88xx_set_wol,
+
+       .driver         = { .owner = THIS_MODULE, }
+} };
+
+module_phy_driver(microchip_phy_driver);
+
+static struct mdio_device_id __maybe_unused microchip_tbl[] = {
+       { 0x0007c130, 0xfffffff0 },
+       { }
+};
+
+MODULE_DEVICE_TABLE(mdio, microchip_tbl);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");