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@@ -0,0 +1,115 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * (C) Copyright 2019
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+ * Alex Marginean, NXP
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+ */
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+
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+#include <common.h>
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+#include <dm.h>
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+#include <miiphy.h>
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+#include <dm/device-internal.h>
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+#include <dm/uclass-internal.h>
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+
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+void dm_mdio_probe_devices(void)
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+{
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+ struct udevice *it;
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+ struct uclass *uc;
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+
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+ uclass_get(UCLASS_MDIO, &uc);
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+ uclass_foreach_dev(it, uc) {
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+ device_probe(it);
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+ }
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+}
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+
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+static int dm_mdio_post_bind(struct udevice *dev)
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+{
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+ /*
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+ * MDIO command doesn't like spaces in names, don't allow them to keep
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+ * it happy
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+ */
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+ if (strchr(dev->name, ' ')) {
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+ debug("\nError: MDIO device name \"%s\" has a space!\n",
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+ dev->name);
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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+/*
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+ * Following read/write/reset functions are registered with legacy MII code.
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+ * These are called for PHY operations by upper layers and we further call the
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+ * DM MDIO driver functions.
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+ */
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+static int mdio_read(struct mii_dev *mii_bus, int addr, int devad, int reg)
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+{
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+ struct udevice *dev = mii_bus->priv;
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+
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+ return mdio_get_ops(dev)->read(dev, addr, devad, reg);
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+}
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+
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+static int mdio_write(struct mii_dev *mii_bus, int addr, int devad, int reg,
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+ u16 val)
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+{
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+ struct udevice *dev = mii_bus->priv;
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+
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+ return mdio_get_ops(dev)->write(dev, addr, devad, reg, val);
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+}
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+
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+static int mdio_reset(struct mii_dev *mii_bus)
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+{
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+ struct udevice *dev = mii_bus->priv;
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+
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+ if (mdio_get_ops(dev)->reset)
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+ return mdio_get_ops(dev)->reset(dev);
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+ else
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+ return 0;
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+}
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+
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+static int dm_mdio_post_probe(struct udevice *dev)
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+{
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+ struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
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+
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+ pdata->mii_bus = mdio_alloc();
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+ pdata->mii_bus->read = mdio_read;
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+ pdata->mii_bus->write = mdio_write;
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+ pdata->mii_bus->reset = mdio_reset;
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+ pdata->mii_bus->priv = dev;
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+ strncpy(pdata->mii_bus->name, dev->name, MDIO_NAME_LEN);
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+
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+ return mdio_register(pdata->mii_bus);
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+}
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+
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+static int dm_mdio_pre_remove(struct udevice *dev)
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+{
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+ struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
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+ struct mdio_ops *ops = mdio_get_ops(dev);
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+
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+ if (ops->reset)
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+ ops->reset(dev);
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+ mdio_unregister(pdata->mii_bus);
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+ mdio_free(pdata->mii_bus);
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+
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+ return 0;
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+}
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+
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+struct phy_device *dm_mdio_phy_connect(struct udevice *dev, int addr,
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+ struct udevice *ethdev,
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+ phy_interface_t interface)
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+{
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+ struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
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+
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+ if (device_probe(dev))
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+ return 0;
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+
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+ return phy_connect(pdata->mii_bus, addr, ethdev, interface);
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+}
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+
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+UCLASS_DRIVER(mdio) = {
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+ .id = UCLASS_MDIO,
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+ .name = "mdio",
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+ .post_bind = dm_mdio_post_bind,
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+ .post_probe = dm_mdio_post_probe,
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+ .pre_remove = dm_mdio_pre_remove,
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+ .per_device_auto_alloc_size = sizeof(struct mdio_perdev_priv),
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+};
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