Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / ethernet / freescale / fec_mpc52xx_phy.c

diff --git a/kernel/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c b/kernel/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
new file mode 100644 (file)
index 0000000..1e647be
--- /dev/null
+++ b/kernel/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
@@ -0,0 +1,158 @@
+/*
+ * Driver for the MPC5200 Fast Ethernet Controller - MDIO bus driver
+ *
+ * Copyright (C) 2007  Domen Puncer, Telargo, Inc.
+ * Copyright (C) 2008  Wolfram Sang, Pengutronix
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/of_mdio.h>
+#include <asm/io.h>
+#include <asm/mpc52xx.h>
+#include "fec_mpc52xx.h"
+
+struct mpc52xx_fec_mdio_priv {
+       struct mpc52xx_fec __iomem *regs;
+       int mdio_irqs[PHY_MAX_ADDR];
+};
+
+static int mpc52xx_fec_mdio_transfer(struct mii_bus *bus, int phy_id,
+               int reg, u32 value)
+{
+       struct mpc52xx_fec_mdio_priv *priv = bus->priv;
+       struct mpc52xx_fec __iomem *fec = priv->regs;
+       int tries = 3;
+
+       value |= (phy_id << FEC_MII_DATA_PA_SHIFT) & FEC_MII_DATA_PA_MSK;
+       value |= (reg << FEC_MII_DATA_RA_SHIFT) & FEC_MII_DATA_RA_MSK;
+
+       out_be32(&fec->ievent, FEC_IEVENT_MII);
+       out_be32(&fec->mii_data, value);
+
+       /* wait for it to finish, this takes about 23 us on lite5200b */
+       while (!(in_be32(&fec->ievent) & FEC_IEVENT_MII) && --tries)
+               msleep(1);
+
+       if (!tries)
+               return -ETIMEDOUT;
+
+       return value & FEC_MII_DATA_OP_RD ?
+               in_be32(&fec->mii_data) & FEC_MII_DATA_DATAMSK : 0;
+}
+
+static int mpc52xx_fec_mdio_read(struct mii_bus *bus, int phy_id, int reg)
+{
+       return mpc52xx_fec_mdio_transfer(bus, phy_id, reg, FEC_MII_READ_FRAME);
+}
+
+static int mpc52xx_fec_mdio_write(struct mii_bus *bus, int phy_id, int reg,
+               u16 data)
+{
+       return mpc52xx_fec_mdio_transfer(bus, phy_id, reg,
+               data | FEC_MII_WRITE_FRAME);
+}
+
+static int mpc52xx_fec_mdio_probe(struct platform_device *of)
+{
+       struct device *dev = &of->dev;
+       struct device_node *np = of->dev.of_node;
+       struct mii_bus *bus;
+       struct mpc52xx_fec_mdio_priv *priv;
+       struct resource res;
+       int err;
+
+       bus = mdiobus_alloc();
+       if (bus == NULL)
+               return -ENOMEM;
+       priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+       if (priv == NULL) {
+               err = -ENOMEM;
+               goto out_free;
+       }
+
+       bus->name = "mpc52xx MII bus";
+       bus->read = mpc52xx_fec_mdio_read;
+       bus->write = mpc52xx_fec_mdio_write;
+
+       /* setup irqs */
+       bus->irq = priv->mdio_irqs;
+
+       /* setup registers */
+       err = of_address_to_resource(np, 0, &res);
+       if (err)
+               goto out_free;
+       priv->regs = ioremap(res.start, resource_size(&res));
+       if (priv->regs == NULL) {
+               err = -ENOMEM;
+               goto out_free;
+       }
+
+       snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);
+       bus->priv = priv;
+
+       bus->parent = dev;
+       dev_set_drvdata(dev, bus);
+
+       /* set MII speed */
+       out_be32(&priv->regs->mii_speed,
+               ((mpc5xxx_get_bus_frequency(of->dev.of_node) >> 20) / 5) << 1);
+
+       err = of_mdiobus_register(bus, np);
+       if (err)
+               goto out_unmap;
+
+       return 0;
+
+ out_unmap:
+       iounmap(priv->regs);
+ out_free:
+       kfree(priv);
+       mdiobus_free(bus);
+
+       return err;
+}
+
+static int mpc52xx_fec_mdio_remove(struct platform_device *of)
+{
+       struct mii_bus *bus = platform_get_drvdata(of);
+       struct mpc52xx_fec_mdio_priv *priv = bus->priv;
+
+       mdiobus_unregister(bus);
+       iounmap(priv->regs);
+       kfree(priv);
+       mdiobus_free(bus);
+
+       return 0;
+}
+
+static const struct of_device_id mpc52xx_fec_mdio_match[] = {
+       { .compatible = "fsl,mpc5200b-mdio", },
+       { .compatible = "fsl,mpc5200-mdio", },
+       { .compatible = "mpc5200b-fec-phy", },
+       {}
+};
+MODULE_DEVICE_TABLE(of, mpc52xx_fec_mdio_match);
+
+struct platform_driver mpc52xx_fec_mdio_driver = {
+       .driver = {
+               .name = "mpc5200b-fec-phy",
+               .owner = THIS_MODULE,
+               .of_match_table = mpc52xx_fec_mdio_match,
+       },
+       .probe = mpc52xx_fec_mdio_probe,
+       .remove = mpc52xx_fec_mdio_remove,
+};
+
+/* let fec driver call it, since this has to be registered before it */
+EXPORT_SYMBOL_GPL(mpc52xx_fec_mdio_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");