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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2019
- * Alex Marginean, NXP
- */
- #include <common.h>
- #include <dm.h>
- #include <log.h>
- #include <malloc.h>
- #include <miiphy.h>
- #include <dm/device-internal.h>
- #include <dm/device_compat.h>
- #include <dm/of_extra.h>
- #include <dm/uclass-internal.h>
- #include <linux/compat.h>
- /* DT node properties for MAC-PHY interface */
- #define PHY_MODE_STR_CNT 2
- static const char *phy_mode_str[PHY_MODE_STR_CNT] = { "phy-mode",
- "phy-connection-type" };
- /* DT node properties that reference a PHY node */
- #define PHY_HANDLE_STR_CNT 3
- const char *phy_handle_str[PHY_HANDLE_STR_CNT] = { "phy-handle",
- "phy",
- "phy-device" };
- void dm_mdio_probe_devices(void)
- {
- struct udevice *it;
- struct uclass *uc;
- uclass_get(UCLASS_MDIO, &uc);
- uclass_foreach_dev(it, uc) {
- device_probe(it);
- }
- }
- static int dm_mdio_post_bind(struct udevice *dev)
- {
- const char *dt_name;
- /* set a custom name for the MDIO device, if present in DT */
- if (dev_has_ofnode(dev)) {
- dt_name = dev_read_string(dev, "device-name");
- if (dt_name) {
- debug("renaming dev %s to %s\n", dev->name, dt_name);
- device_set_name(dev, dt_name);
- }
- }
- /*
- * MDIO command doesn't like spaces in names, don't allow them to keep
- * it happy
- */
- if (strchr(dev->name, ' ')) {
- debug("\nError: MDIO device name \"%s\" has a space!\n",
- dev->name);
- return -EINVAL;
- }
- return 0;
- }
- /*
- * Following read/write/reset functions are registered with legacy MII code.
- * These are called for PHY operations by upper layers and we further call the
- * DM MDIO driver functions.
- */
- static int mdio_read(struct mii_dev *mii_bus, int addr, int devad, int reg)
- {
- struct udevice *dev = mii_bus->priv;
- return mdio_get_ops(dev)->read(dev, addr, devad, reg);
- }
- static int mdio_write(struct mii_dev *mii_bus, int addr, int devad, int reg,
- u16 val)
- {
- struct udevice *dev = mii_bus->priv;
- return mdio_get_ops(dev)->write(dev, addr, devad, reg, val);
- }
- static int mdio_reset(struct mii_dev *mii_bus)
- {
- struct udevice *dev = mii_bus->priv;
- if (mdio_get_ops(dev)->reset)
- return mdio_get_ops(dev)->reset(dev);
- else
- return 0;
- }
- static int dm_mdio_post_probe(struct udevice *dev)
- {
- struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
- pdata->mii_bus = mdio_alloc();
- pdata->mii_bus->read = mdio_read;
- pdata->mii_bus->write = mdio_write;
- pdata->mii_bus->reset = mdio_reset;
- pdata->mii_bus->priv = dev;
- strncpy(pdata->mii_bus->name, dev->name, MDIO_NAME_LEN - 1);
- return mdio_register(pdata->mii_bus);
- }
- static int dm_mdio_pre_remove(struct udevice *dev)
- {
- struct mdio_perdev_priv *pdata = dev_get_uclass_priv(dev);
- struct mdio_ops *ops = mdio_get_ops(dev);
- if (ops->reset)
- ops->reset(dev);
- mdio_unregister(pdata->mii_bus);
- mdio_free(pdata->mii_bus);
- return 0;
- }
- struct phy_device *dm_mdio_phy_connect(struct udevice *mdiodev, int phyaddr,
- struct udevice *ethdev,
- phy_interface_t interface)
- {
- struct mdio_perdev_priv *pdata = dev_get_uclass_priv(mdiodev);
- if (device_probe(mdiodev))
- return NULL;
- return phy_connect(pdata->mii_bus, phyaddr, ethdev, interface);
- }
- static struct phy_device *dm_eth_connect_phy_handle(struct udevice *ethdev,
- phy_interface_t interface)
- {
- u32 phy_addr;
- struct udevice *mdiodev;
- struct phy_device *phy;
- struct ofnode_phandle_args phandle = {.node = ofnode_null()};
- ofnode phynode;
- int i;
- if (CONFIG_IS_ENABLED(PHY_FIXED) &&
- ofnode_phy_is_fixed_link(dev_ofnode(ethdev), &phynode)) {
- phy = phy_connect(NULL, 0, ethdev, interface);
- phandle.node = phynode;
- goto out;
- }
- for (i = 0; i < PHY_HANDLE_STR_CNT; i++)
- if (!dev_read_phandle_with_args(ethdev, phy_handle_str[i], NULL,
- 0, 0, &phandle))
- break;
- if (!ofnode_valid(phandle.node)) {
- dev_dbg(ethdev, "can't find PHY node\n");
- return NULL;
- }
- /*
- * reading 'reg' directly should be fine. This is a PHY node, the
- * address is always size 1 and requires no translation
- */
- if (ofnode_read_u32(phandle.node, "reg", &phy_addr)) {
- dev_dbg(ethdev, "missing reg property in phy node\n");
- return NULL;
- }
- if (uclass_get_device_by_ofnode(UCLASS_MDIO,
- ofnode_get_parent(phandle.node),
- &mdiodev)) {
- dev_dbg(ethdev, "can't find MDIO bus for node %s\n",
- ofnode_get_name(ofnode_get_parent(phandle.node)));
- return NULL;
- }
- phy = dm_mdio_phy_connect(mdiodev, phy_addr, ethdev, interface);
- out:
- if (phy)
- phy->node = phandle.node;
- return phy;
- }
- /* Connect to a PHY linked in eth DT node */
- struct phy_device *dm_eth_phy_connect(struct udevice *ethdev)
- {
- const char *if_str;
- phy_interface_t interface;
- struct phy_device *phy;
- int i;
- if (!dev_has_ofnode(ethdev)) {
- debug("%s: supplied eth dev has no DT node!\n", ethdev->name);
- return NULL;
- }
- interface = PHY_INTERFACE_MODE_NONE;
- for (i = 0; i < PHY_MODE_STR_CNT; i++) {
- if_str = dev_read_string(ethdev, phy_mode_str[i]);
- if (if_str) {
- interface = phy_get_interface_by_name(if_str);
- break;
- }
- }
- if (interface < 0)
- interface = PHY_INTERFACE_MODE_NONE;
- if (interface == PHY_INTERFACE_MODE_NONE)
- dev_dbg(ethdev, "can't find interface mode, default to NONE\n");
- phy = dm_eth_connect_phy_handle(ethdev, interface);
- if (!phy)
- return NULL;
- phy->interface = interface;
- return phy;
- }
- UCLASS_DRIVER(mdio) = {
- .id = UCLASS_MDIO,
- .name = "mdio",
- .post_bind = dm_mdio_post_bind,
- .post_probe = dm_mdio_post_probe,
- .pre_remove = dm_mdio_pre_remove,
- .per_device_auto = sizeof(struct mdio_perdev_priv),
- };
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