Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 154 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c b/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
new file mode 100644
index 000000000..b5497e308
--- /dev/null
+++ b/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
@@ -0,0 +1,154 @@
+/*
+ * 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;
+};
+
+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 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");