Better place for of_mdio.c is drivers/net/mdio.
Move of_mdio.c from drivers/of to drivers/net/mdio
Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
F: Documentation/devicetree/bindings/net/qca,ar803x.yaml
F: Documentation/networking/phy.rst
F: drivers/net/mdio/
+F: drivers/net/mdio/of_mdio.c
F: drivers/net/pcs/
F: drivers/net/phy/
-F: drivers/of/of_mdio.c
F: drivers/of/of_net.c
F: include/dt-bindings/net/qca-ar803x.h
F: include/linux/*mdio*.h
reflects whether the mdio_bus/mdio_device code is built as a
loadable module or built-in.
+config OF_MDIO
+ def_tristate PHYLIB
+ depends on OF
+ depends on PHYLIB
+ select FIXED_PHY
+ help
+ OpenFirmware MDIO bus (Ethernet PHY) accessors
+
if MDIO_BUS
config MDIO_DEVRES
# SPDX-License-Identifier: GPL-2.0
# Makefile for Linux MDIO bus drivers
+obj-$(CONFIG_OF_MDIO) += of_mdio.o
+
obj-$(CONFIG_MDIO_ASPEED) += mdio-aspeed.o
obj-$(CONFIG_MDIO_BCM_IPROC) += mdio-bcm-iproc.o
obj-$(CONFIG_MDIO_BCM_UNIMAC) += mdio-bcm-unimac.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * OF helpers for the MDIO (Ethernet PHY) API
+ *
+ * Copyright (c) 2009 Secret Lab Technologies, Ltd.
+ *
+ * This file provides helper functions for extracting PHY device information
+ * out of the OpenFirmware device tree and using it to populate an mii_bus.
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/err.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/module.h>
+
+#define DEFAULT_GPIO_RESET_DELAY 10 /* in microseconds */
+
+MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
+MODULE_LICENSE("GPL");
+
+/* Extract the clause 22 phy ID from the compatible string of the form
+ * ethernet-phy-idAAAA.BBBB */
+static int of_get_phy_id(struct device_node *device, u32 *phy_id)
+{
+ struct property *prop;
+ const char *cp;
+ unsigned int upper, lower;
+
+ of_property_for_each_string(device, "compatible", prop, cp) {
+ if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) == 2) {
+ *phy_id = ((upper & 0xFFFF) << 16) | (lower & 0xFFFF);
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static struct mii_timestamper *of_find_mii_timestamper(struct device_node *node)
+{
+ struct of_phandle_args arg;
+ int err;
+
+ err = of_parse_phandle_with_fixed_args(node, "timestamper", 1, 0, &arg);
+
+ if (err == -ENOENT)
+ return NULL;
+ else if (err)
+ return ERR_PTR(err);
+
+ if (arg.args_count != 1)
+ return ERR_PTR(-EINVAL);
+
+ return register_mii_timestamper(arg.np, arg.args[0]);
+}
+
+int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
+ struct device_node *child, u32 addr)
+{
+ int rc;
+
+ rc = of_irq_get(child, 0);
+ if (rc == -EPROBE_DEFER)
+ return rc;
+
+ if (rc > 0) {
+ phy->irq = rc;
+ mdio->irq[addr] = rc;
+ } else {
+ phy->irq = mdio->irq[addr];
+ }
+
+ if (of_property_read_bool(child, "broken-turn-around"))
+ mdio->phy_ignore_ta_mask |= 1 << addr;
+
+ of_property_read_u32(child, "reset-assert-us",
+ &phy->mdio.reset_assert_delay);
+ of_property_read_u32(child, "reset-deassert-us",
+ &phy->mdio.reset_deassert_delay);
+
+ /* Associate the OF node with the device structure so it
+ * can be looked up later */
+ of_node_get(child);
+ phy->mdio.dev.of_node = child;
+ phy->mdio.dev.fwnode = of_fwnode_handle(child);
+
+ /* All data is now stored in the phy struct;
+ * register it */
+ rc = phy_device_register(phy);
+ if (rc) {
+ of_node_put(child);
+ return rc;
+ }
+
+ dev_dbg(&mdio->dev, "registered phy %pOFn at address %i\n",
+ child, addr);
+ return 0;
+}
+EXPORT_SYMBOL(of_mdiobus_phy_device_register);
+
+static int of_mdiobus_register_phy(struct mii_bus *mdio,
+ struct device_node *child, u32 addr)
+{
+ struct mii_timestamper *mii_ts;
+ struct phy_device *phy;
+ bool is_c45;
+ int rc;
+ u32 phy_id;
+
+ mii_ts = of_find_mii_timestamper(child);
+ if (IS_ERR(mii_ts))
+ return PTR_ERR(mii_ts);
+
+ is_c45 = of_device_is_compatible(child,
+ "ethernet-phy-ieee802.3-c45");
+
+ if (!is_c45 && !of_get_phy_id(child, &phy_id))
+ phy = phy_device_create(mdio, addr, phy_id, 0, NULL);
+ else
+ phy = get_phy_device(mdio, addr, is_c45);
+ if (IS_ERR(phy)) {
+ if (mii_ts)
+ unregister_mii_timestamper(mii_ts);
+ return PTR_ERR(phy);
+ }
+
+ rc = of_mdiobus_phy_device_register(mdio, phy, child, addr);
+ if (rc) {
+ if (mii_ts)
+ unregister_mii_timestamper(mii_ts);
+ phy_device_free(phy);
+ return rc;
+ }
+
+ /* phy->mii_ts may already be defined by the PHY driver. A
+ * mii_timestamper probed via the device tree will still have
+ * precedence.
+ */
+ if (mii_ts)
+ phy->mii_ts = mii_ts;
+
+ return 0;
+}
+
+static int of_mdiobus_register_device(struct mii_bus *mdio,
+ struct device_node *child, u32 addr)
+{
+ struct mdio_device *mdiodev;
+ int rc;
+
+ mdiodev = mdio_device_create(mdio, addr);
+ if (IS_ERR(mdiodev))
+ return PTR_ERR(mdiodev);
+
+ /* Associate the OF node with the device structure so it
+ * can be looked up later.
+ */
+ of_node_get(child);
+ mdiodev->dev.of_node = child;
+ mdiodev->dev.fwnode = of_fwnode_handle(child);
+
+ /* All data is now stored in the mdiodev struct; register it. */
+ rc = mdio_device_register(mdiodev);
+ if (rc) {
+ mdio_device_free(mdiodev);
+ of_node_put(child);
+ return rc;
+ }
+
+ dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n",
+ child, addr);
+ return 0;
+}
+
+/* The following is a list of PHY compatible strings which appear in
+ * some DTBs. The compatible string is never matched against a PHY
+ * driver, so is pointless. We only expect devices which are not PHYs
+ * to have a compatible string, so they can be matched to an MDIO
+ * driver. Encourage users to upgrade their DT blobs to remove these.
+ */
+static const struct of_device_id whitelist_phys[] = {
+ { .compatible = "brcm,40nm-ephy" },
+ { .compatible = "broadcom,bcm5241" },
+ { .compatible = "marvell,88E1111", },
+ { .compatible = "marvell,88e1116", },
+ { .compatible = "marvell,88e1118", },
+ { .compatible = "marvell,88e1145", },
+ { .compatible = "marvell,88e1149r", },
+ { .compatible = "marvell,88e1310", },
+ { .compatible = "marvell,88E1510", },
+ { .compatible = "marvell,88E1514", },
+ { .compatible = "moxa,moxart-rtl8201cp", },
+ {}
+};
+
+/*
+ * Return true if the child node is for a phy. It must either:
+ * o Compatible string of "ethernet-phy-idX.X"
+ * o Compatible string of "ethernet-phy-ieee802.3-c45"
+ * o Compatible string of "ethernet-phy-ieee802.3-c22"
+ * o In the white list above (and issue a warning)
+ * o No compatibility string
+ *
+ * A device which is not a phy is expected to have a compatible string
+ * indicating what sort of device it is.
+ */
+bool of_mdiobus_child_is_phy(struct device_node *child)
+{
+ u32 phy_id;
+
+ if (of_get_phy_id(child, &phy_id) != -EINVAL)
+ return true;
+
+ if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c45"))
+ return true;
+
+ if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22"))
+ return true;
+
+ if (of_match_node(whitelist_phys, child)) {
+ pr_warn(FW_WARN
+ "%pOF: Whitelisted compatible string. Please remove\n",
+ child);
+ return true;
+ }
+
+ if (!of_find_property(child, "compatible", NULL))
+ return true;
+
+ return false;
+}
+EXPORT_SYMBOL(of_mdiobus_child_is_phy);
+
+/**
+ * of_mdiobus_register - Register mii_bus and create PHYs from the device tree
+ * @mdio: pointer to mii_bus structure
+ * @np: pointer to device_node of MDIO bus.
+ *
+ * This function registers the mii_bus structure and registers a phy_device
+ * for each child node of @np.
+ */
+int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
+{
+ struct device_node *child;
+ bool scanphys = false;
+ int addr, rc;
+
+ if (!np)
+ return mdiobus_register(mdio);
+
+ /* Do not continue if the node is disabled */
+ if (!of_device_is_available(np))
+ return -ENODEV;
+
+ /* Mask out all PHYs from auto probing. Instead the PHYs listed in
+ * the device tree are populated after the bus has been registered */
+ mdio->phy_mask = ~0;
+
+ mdio->dev.of_node = np;
+ mdio->dev.fwnode = of_fwnode_handle(np);
+
+ /* Get bus level PHY reset GPIO details */
+ mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;
+ of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us);
+ mdio->reset_post_delay_us = 0;
+ of_property_read_u32(np, "reset-post-delay-us", &mdio->reset_post_delay_us);
+
+ /* Register the MDIO bus */
+ rc = mdiobus_register(mdio);
+ if (rc)
+ return rc;
+
+ /* Loop over the child nodes and register a phy_device for each phy */
+ for_each_available_child_of_node(np, child) {
+ addr = of_mdio_parse_addr(&mdio->dev, child);
+ if (addr < 0) {
+ scanphys = true;
+ continue;
+ }
+
+ if (of_mdiobus_child_is_phy(child))
+ rc = of_mdiobus_register_phy(mdio, child, addr);
+ else
+ rc = of_mdiobus_register_device(mdio, child, addr);
+
+ if (rc == -ENODEV)
+ dev_err(&mdio->dev,
+ "MDIO device at address %d is missing.\n",
+ addr);
+ else if (rc)
+ goto unregister;
+ }
+
+ if (!scanphys)
+ return 0;
+
+ /* auto scan for PHYs with empty reg property */
+ for_each_available_child_of_node(np, child) {
+ /* Skip PHYs with reg property set */
+ if (of_find_property(child, "reg", NULL))
+ continue;
+
+ for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
+ /* skip already registered PHYs */
+ if (mdiobus_is_registered_device(mdio, addr))
+ continue;
+
+ /* be noisy to encourage people to set reg property */
+ dev_info(&mdio->dev, "scan phy %pOFn at address %i\n",
+ child, addr);
+
+ if (of_mdiobus_child_is_phy(child)) {
+ /* -ENODEV is the return code that PHYLIB has
+ * standardized on to indicate that bus
+ * scanning should continue.
+ */
+ rc = of_mdiobus_register_phy(mdio, child, addr);
+ if (!rc)
+ break;
+ if (rc != -ENODEV)
+ goto unregister;
+ }
+ }
+ }
+
+ return 0;
+
+unregister:
+ mdiobus_unregister(mdio);
+ return rc;
+}
+EXPORT_SYMBOL(of_mdiobus_register);
+
+/**
+ * of_mdio_find_device - Given a device tree node, find the mdio_device
+ * @np: pointer to the mdio_device's device tree node
+ *
+ * If successful, returns a pointer to the mdio_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure.
+ * The caller should call put_device() on the mdio_device after its use
+ */
+struct mdio_device *of_mdio_find_device(struct device_node *np)
+{
+ struct device *d;
+
+ if (!np)
+ return NULL;
+
+ d = bus_find_device_by_of_node(&mdio_bus_type, np);
+ if (!d)
+ return NULL;
+
+ return to_mdio_device(d);
+}
+EXPORT_SYMBOL(of_mdio_find_device);
+
+/**
+ * of_phy_find_device - Give a PHY node, find the phy_device
+ * @phy_np: Pointer to the phy's device tree node
+ *
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure.
+ */
+struct phy_device *of_phy_find_device(struct device_node *phy_np)
+{
+ struct mdio_device *mdiodev;
+
+ mdiodev = of_mdio_find_device(phy_np);
+ if (!mdiodev)
+ return NULL;
+
+ if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
+ return to_phy_device(&mdiodev->dev);
+
+ put_device(&mdiodev->dev);
+
+ return NULL;
+}
+EXPORT_SYMBOL(of_phy_find_device);
+
+/**
+ * of_phy_connect - Connect to the phy described in the device tree
+ * @dev: pointer to net_device claiming the phy
+ * @phy_np: Pointer to device tree node for the PHY
+ * @hndlr: Link state callback for the network device
+ * @flags: flags to pass to the PHY
+ * @iface: PHY data interface type
+ *
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure. The
+ * refcount must be dropped by calling phy_disconnect() or phy_detach().
+ */
+struct phy_device *of_phy_connect(struct net_device *dev,
+ struct device_node *phy_np,
+ void (*hndlr)(struct net_device *), u32 flags,
+ phy_interface_t iface)
+{
+ struct phy_device *phy = of_phy_find_device(phy_np);
+ int ret;
+
+ if (!phy)
+ return NULL;
+
+ phy->dev_flags |= flags;
+
+ ret = phy_connect_direct(dev, phy, hndlr, iface);
+
+ /* refcount is held by phy_connect_direct() on success */
+ put_device(&phy->mdio.dev);
+
+ return ret ? NULL : phy;
+}
+EXPORT_SYMBOL(of_phy_connect);
+
+/**
+ * of_phy_get_and_connect
+ * - Get phy node and connect to the phy described in the device tree
+ * @dev: pointer to net_device claiming the phy
+ * @np: Pointer to device tree node for the net_device claiming the phy
+ * @hndlr: Link state callback for the network device
+ *
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure. The
+ * refcount must be dropped by calling phy_disconnect() or phy_detach().
+ */
+struct phy_device *of_phy_get_and_connect(struct net_device *dev,
+ struct device_node *np,
+ void (*hndlr)(struct net_device *))
+{
+ phy_interface_t iface;
+ struct device_node *phy_np;
+ struct phy_device *phy;
+ int ret;
+
+ ret = of_get_phy_mode(np, &iface);
+ if (ret)
+ return NULL;
+ if (of_phy_is_fixed_link(np)) {
+ ret = of_phy_register_fixed_link(np);
+ if (ret < 0) {
+ netdev_err(dev, "broken fixed-link specification\n");
+ return NULL;
+ }
+ phy_np = of_node_get(np);
+ } else {
+ phy_np = of_parse_phandle(np, "phy-handle", 0);
+ if (!phy_np)
+ return NULL;
+ }
+
+ phy = of_phy_connect(dev, phy_np, hndlr, 0, iface);
+
+ of_node_put(phy_np);
+
+ return phy;
+}
+EXPORT_SYMBOL(of_phy_get_and_connect);
+
+/**
+ * of_phy_attach - Attach to a PHY without starting the state machine
+ * @dev: pointer to net_device claiming the phy
+ * @phy_np: Node pointer for the PHY
+ * @flags: flags to pass to the PHY
+ * @iface: PHY data interface type
+ *
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure. The
+ * refcount must be dropped by calling phy_disconnect() or phy_detach().
+ */
+struct phy_device *of_phy_attach(struct net_device *dev,
+ struct device_node *phy_np, u32 flags,
+ phy_interface_t iface)
+{
+ struct phy_device *phy = of_phy_find_device(phy_np);
+ int ret;
+
+ if (!phy)
+ return NULL;
+
+ ret = phy_attach_direct(dev, phy, flags, iface);
+
+ /* refcount is held by phy_attach_direct() on success */
+ put_device(&phy->mdio.dev);
+
+ return ret ? NULL : phy;
+}
+EXPORT_SYMBOL(of_phy_attach);
+
+/*
+ * of_phy_is_fixed_link() and of_phy_register_fixed_link() must
+ * support two DT bindings:
+ * - the old DT binding, where 'fixed-link' was a property with 5
+ * cells encoding various informations about the fixed PHY
+ * - the new DT binding, where 'fixed-link' is a sub-node of the
+ * Ethernet device.
+ */
+bool of_phy_is_fixed_link(struct device_node *np)
+{
+ struct device_node *dn;
+ int len, err;
+ const char *managed;
+
+ /* New binding */
+ dn = of_get_child_by_name(np, "fixed-link");
+ if (dn) {
+ of_node_put(dn);
+ return true;
+ }
+
+ err = of_property_read_string(np, "managed", &managed);
+ if (err == 0 && strcmp(managed, "auto") != 0)
+ return true;
+
+ /* Old binding */
+ if (of_get_property(np, "fixed-link", &len) &&
+ len == (5 * sizeof(__be32)))
+ return true;
+
+ return false;
+}
+EXPORT_SYMBOL(of_phy_is_fixed_link);
+
+int of_phy_register_fixed_link(struct device_node *np)
+{
+ struct fixed_phy_status status = {};
+ struct device_node *fixed_link_node;
+ u32 fixed_link_prop[5];
+ const char *managed;
+
+ if (of_property_read_string(np, "managed", &managed) == 0 &&
+ strcmp(managed, "in-band-status") == 0) {
+ /* status is zeroed, namely its .link member */
+ goto register_phy;
+ }
+
+ /* New binding */
+ fixed_link_node = of_get_child_by_name(np, "fixed-link");
+ if (fixed_link_node) {
+ status.link = 1;
+ status.duplex = of_property_read_bool(fixed_link_node,
+ "full-duplex");
+ if (of_property_read_u32(fixed_link_node, "speed",
+ &status.speed)) {
+ of_node_put(fixed_link_node);
+ return -EINVAL;
+ }
+ status.pause = of_property_read_bool(fixed_link_node, "pause");
+ status.asym_pause = of_property_read_bool(fixed_link_node,
+ "asym-pause");
+ of_node_put(fixed_link_node);
+
+ goto register_phy;
+ }
+
+ /* Old binding */
+ if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop,
+ ARRAY_SIZE(fixed_link_prop)) == 0) {
+ status.link = 1;
+ status.duplex = fixed_link_prop[1];
+ status.speed = fixed_link_prop[2];
+ status.pause = fixed_link_prop[3];
+ status.asym_pause = fixed_link_prop[4];
+ goto register_phy;
+ }
+
+ return -ENODEV;
+
+register_phy:
+ return PTR_ERR_OR_ZERO(fixed_phy_register(PHY_POLL, &status, np));
+}
+EXPORT_SYMBOL(of_phy_register_fixed_link);
+
+void of_phy_deregister_fixed_link(struct device_node *np)
+{
+ struct phy_device *phydev;
+
+ phydev = of_phy_find_device(np);
+ if (!phydev)
+ return;
+
+ fixed_phy_unregister(phydev);
+
+ put_device(&phydev->mdio.dev); /* of_phy_find_device() */
+ phy_device_free(phydev); /* fixed_phy_register() */
+}
+EXPORT_SYMBOL(of_phy_deregister_fixed_link);
depends on NETDEVICES
def_bool y
-config OF_MDIO
- def_tristate PHYLIB
- depends on PHYLIB
- select FIXED_PHY
- help
- OpenFirmware MDIO bus (Ethernet PHY) accessors
-
config OF_RESERVED_MEM
bool
depends on OF_EARLY_FLATTREE
obj-$(CONFIG_OF_IRQ) += irq.o
obj-$(CONFIG_OF_NET) += of_net.o
obj-$(CONFIG_OF_UNITTEST) += unittest.o
-obj-$(CONFIG_OF_MDIO) += of_mdio.o
obj-$(CONFIG_OF_RESERVED_MEM) += of_reserved_mem.o
obj-$(CONFIG_OF_RESOLVE) += resolver.o
obj-$(CONFIG_OF_OVERLAY) += overlay.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * OF helpers for the MDIO (Ethernet PHY) API
- *
- * Copyright (c) 2009 Secret Lab Technologies, Ltd.
- *
- * This file provides helper functions for extracting PHY device information
- * out of the OpenFirmware device tree and using it to populate an mii_bus.
- */
-
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/netdevice.h>
-#include <linux/err.h>
-#include <linux/phy.h>
-#include <linux/phy_fixed.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <linux/of_mdio.h>
-#include <linux/of_net.h>
-#include <linux/module.h>
-
-#define DEFAULT_GPIO_RESET_DELAY 10 /* in microseconds */
-
-MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
-MODULE_LICENSE("GPL");
-
-/* Extract the clause 22 phy ID from the compatible string of the form
- * ethernet-phy-idAAAA.BBBB */
-static int of_get_phy_id(struct device_node *device, u32 *phy_id)
-{
- struct property *prop;
- const char *cp;
- unsigned int upper, lower;
-
- of_property_for_each_string(device, "compatible", prop, cp) {
- if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) == 2) {
- *phy_id = ((upper & 0xFFFF) << 16) | (lower & 0xFFFF);
- return 0;
- }
- }
- return -EINVAL;
-}
-
-static struct mii_timestamper *of_find_mii_timestamper(struct device_node *node)
-{
- struct of_phandle_args arg;
- int err;
-
- err = of_parse_phandle_with_fixed_args(node, "timestamper", 1, 0, &arg);
-
- if (err == -ENOENT)
- return NULL;
- else if (err)
- return ERR_PTR(err);
-
- if (arg.args_count != 1)
- return ERR_PTR(-EINVAL);
-
- return register_mii_timestamper(arg.np, arg.args[0]);
-}
-
-int of_mdiobus_phy_device_register(struct mii_bus *mdio, struct phy_device *phy,
- struct device_node *child, u32 addr)
-{
- int rc;
-
- rc = of_irq_get(child, 0);
- if (rc == -EPROBE_DEFER)
- return rc;
-
- if (rc > 0) {
- phy->irq = rc;
- mdio->irq[addr] = rc;
- } else {
- phy->irq = mdio->irq[addr];
- }
-
- if (of_property_read_bool(child, "broken-turn-around"))
- mdio->phy_ignore_ta_mask |= 1 << addr;
-
- of_property_read_u32(child, "reset-assert-us",
- &phy->mdio.reset_assert_delay);
- of_property_read_u32(child, "reset-deassert-us",
- &phy->mdio.reset_deassert_delay);
-
- /* Associate the OF node with the device structure so it
- * can be looked up later */
- of_node_get(child);
- phy->mdio.dev.of_node = child;
- phy->mdio.dev.fwnode = of_fwnode_handle(child);
-
- /* All data is now stored in the phy struct;
- * register it */
- rc = phy_device_register(phy);
- if (rc) {
- of_node_put(child);
- return rc;
- }
-
- dev_dbg(&mdio->dev, "registered phy %pOFn at address %i\n",
- child, addr);
- return 0;
-}
-EXPORT_SYMBOL(of_mdiobus_phy_device_register);
-
-static int of_mdiobus_register_phy(struct mii_bus *mdio,
- struct device_node *child, u32 addr)
-{
- struct mii_timestamper *mii_ts;
- struct phy_device *phy;
- bool is_c45;
- int rc;
- u32 phy_id;
-
- mii_ts = of_find_mii_timestamper(child);
- if (IS_ERR(mii_ts))
- return PTR_ERR(mii_ts);
-
- is_c45 = of_device_is_compatible(child,
- "ethernet-phy-ieee802.3-c45");
-
- if (!is_c45 && !of_get_phy_id(child, &phy_id))
- phy = phy_device_create(mdio, addr, phy_id, 0, NULL);
- else
- phy = get_phy_device(mdio, addr, is_c45);
- if (IS_ERR(phy)) {
- if (mii_ts)
- unregister_mii_timestamper(mii_ts);
- return PTR_ERR(phy);
- }
-
- rc = of_mdiobus_phy_device_register(mdio, phy, child, addr);
- if (rc) {
- if (mii_ts)
- unregister_mii_timestamper(mii_ts);
- phy_device_free(phy);
- return rc;
- }
-
- /* phy->mii_ts may already be defined by the PHY driver. A
- * mii_timestamper probed via the device tree will still have
- * precedence.
- */
- if (mii_ts)
- phy->mii_ts = mii_ts;
-
- return 0;
-}
-
-static int of_mdiobus_register_device(struct mii_bus *mdio,
- struct device_node *child, u32 addr)
-{
- struct mdio_device *mdiodev;
- int rc;
-
- mdiodev = mdio_device_create(mdio, addr);
- if (IS_ERR(mdiodev))
- return PTR_ERR(mdiodev);
-
- /* Associate the OF node with the device structure so it
- * can be looked up later.
- */
- of_node_get(child);
- mdiodev->dev.of_node = child;
- mdiodev->dev.fwnode = of_fwnode_handle(child);
-
- /* All data is now stored in the mdiodev struct; register it. */
- rc = mdio_device_register(mdiodev);
- if (rc) {
- mdio_device_free(mdiodev);
- of_node_put(child);
- return rc;
- }
-
- dev_dbg(&mdio->dev, "registered mdio device %pOFn at address %i\n",
- child, addr);
- return 0;
-}
-
-/* The following is a list of PHY compatible strings which appear in
- * some DTBs. The compatible string is never matched against a PHY
- * driver, so is pointless. We only expect devices which are not PHYs
- * to have a compatible string, so they can be matched to an MDIO
- * driver. Encourage users to upgrade their DT blobs to remove these.
- */
-static const struct of_device_id whitelist_phys[] = {
- { .compatible = "brcm,40nm-ephy" },
- { .compatible = "broadcom,bcm5241" },
- { .compatible = "marvell,88E1111", },
- { .compatible = "marvell,88e1116", },
- { .compatible = "marvell,88e1118", },
- { .compatible = "marvell,88e1145", },
- { .compatible = "marvell,88e1149r", },
- { .compatible = "marvell,88e1310", },
- { .compatible = "marvell,88E1510", },
- { .compatible = "marvell,88E1514", },
- { .compatible = "moxa,moxart-rtl8201cp", },
- {}
-};
-
-/*
- * Return true if the child node is for a phy. It must either:
- * o Compatible string of "ethernet-phy-idX.X"
- * o Compatible string of "ethernet-phy-ieee802.3-c45"
- * o Compatible string of "ethernet-phy-ieee802.3-c22"
- * o In the white list above (and issue a warning)
- * o No compatibility string
- *
- * A device which is not a phy is expected to have a compatible string
- * indicating what sort of device it is.
- */
-bool of_mdiobus_child_is_phy(struct device_node *child)
-{
- u32 phy_id;
-
- if (of_get_phy_id(child, &phy_id) != -EINVAL)
- return true;
-
- if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c45"))
- return true;
-
- if (of_device_is_compatible(child, "ethernet-phy-ieee802.3-c22"))
- return true;
-
- if (of_match_node(whitelist_phys, child)) {
- pr_warn(FW_WARN
- "%pOF: Whitelisted compatible string. Please remove\n",
- child);
- return true;
- }
-
- if (!of_find_property(child, "compatible", NULL))
- return true;
-
- return false;
-}
-EXPORT_SYMBOL(of_mdiobus_child_is_phy);
-
-/**
- * of_mdiobus_register - Register mii_bus and create PHYs from the device tree
- * @mdio: pointer to mii_bus structure
- * @np: pointer to device_node of MDIO bus.
- *
- * This function registers the mii_bus structure and registers a phy_device
- * for each child node of @np.
- */
-int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
-{
- struct device_node *child;
- bool scanphys = false;
- int addr, rc;
-
- if (!np)
- return mdiobus_register(mdio);
-
- /* Do not continue if the node is disabled */
- if (!of_device_is_available(np))
- return -ENODEV;
-
- /* Mask out all PHYs from auto probing. Instead the PHYs listed in
- * the device tree are populated after the bus has been registered */
- mdio->phy_mask = ~0;
-
- mdio->dev.of_node = np;
- mdio->dev.fwnode = of_fwnode_handle(np);
-
- /* Get bus level PHY reset GPIO details */
- mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;
- of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us);
- mdio->reset_post_delay_us = 0;
- of_property_read_u32(np, "reset-post-delay-us", &mdio->reset_post_delay_us);
-
- /* Register the MDIO bus */
- rc = mdiobus_register(mdio);
- if (rc)
- return rc;
-
- /* Loop over the child nodes and register a phy_device for each phy */
- for_each_available_child_of_node(np, child) {
- addr = of_mdio_parse_addr(&mdio->dev, child);
- if (addr < 0) {
- scanphys = true;
- continue;
- }
-
- if (of_mdiobus_child_is_phy(child))
- rc = of_mdiobus_register_phy(mdio, child, addr);
- else
- rc = of_mdiobus_register_device(mdio, child, addr);
-
- if (rc == -ENODEV)
- dev_err(&mdio->dev,
- "MDIO device at address %d is missing.\n",
- addr);
- else if (rc)
- goto unregister;
- }
-
- if (!scanphys)
- return 0;
-
- /* auto scan for PHYs with empty reg property */
- for_each_available_child_of_node(np, child) {
- /* Skip PHYs with reg property set */
- if (of_find_property(child, "reg", NULL))
- continue;
-
- for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
- /* skip already registered PHYs */
- if (mdiobus_is_registered_device(mdio, addr))
- continue;
-
- /* be noisy to encourage people to set reg property */
- dev_info(&mdio->dev, "scan phy %pOFn at address %i\n",
- child, addr);
-
- if (of_mdiobus_child_is_phy(child)) {
- /* -ENODEV is the return code that PHYLIB has
- * standardized on to indicate that bus
- * scanning should continue.
- */
- rc = of_mdiobus_register_phy(mdio, child, addr);
- if (!rc)
- break;
- if (rc != -ENODEV)
- goto unregister;
- }
- }
- }
-
- return 0;
-
-unregister:
- mdiobus_unregister(mdio);
- return rc;
-}
-EXPORT_SYMBOL(of_mdiobus_register);
-
-/**
- * of_mdio_find_device - Given a device tree node, find the mdio_device
- * @np: pointer to the mdio_device's device tree node
- *
- * If successful, returns a pointer to the mdio_device with the embedded
- * struct device refcount incremented by one, or NULL on failure.
- * The caller should call put_device() on the mdio_device after its use
- */
-struct mdio_device *of_mdio_find_device(struct device_node *np)
-{
- struct device *d;
-
- if (!np)
- return NULL;
-
- d = bus_find_device_by_of_node(&mdio_bus_type, np);
- if (!d)
- return NULL;
-
- return to_mdio_device(d);
-}
-EXPORT_SYMBOL(of_mdio_find_device);
-
-/**
- * of_phy_find_device - Give a PHY node, find the phy_device
- * @phy_np: Pointer to the phy's device tree node
- *
- * If successful, returns a pointer to the phy_device with the embedded
- * struct device refcount incremented by one, or NULL on failure.
- */
-struct phy_device *of_phy_find_device(struct device_node *phy_np)
-{
- struct mdio_device *mdiodev;
-
- mdiodev = of_mdio_find_device(phy_np);
- if (!mdiodev)
- return NULL;
-
- if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
- return to_phy_device(&mdiodev->dev);
-
- put_device(&mdiodev->dev);
-
- return NULL;
-}
-EXPORT_SYMBOL(of_phy_find_device);
-
-/**
- * of_phy_connect - Connect to the phy described in the device tree
- * @dev: pointer to net_device claiming the phy
- * @phy_np: Pointer to device tree node for the PHY
- * @hndlr: Link state callback for the network device
- * @flags: flags to pass to the PHY
- * @iface: PHY data interface type
- *
- * If successful, returns a pointer to the phy_device with the embedded
- * struct device refcount incremented by one, or NULL on failure. The
- * refcount must be dropped by calling phy_disconnect() or phy_detach().
- */
-struct phy_device *of_phy_connect(struct net_device *dev,
- struct device_node *phy_np,
- void (*hndlr)(struct net_device *), u32 flags,
- phy_interface_t iface)
-{
- struct phy_device *phy = of_phy_find_device(phy_np);
- int ret;
-
- if (!phy)
- return NULL;
-
- phy->dev_flags |= flags;
-
- ret = phy_connect_direct(dev, phy, hndlr, iface);
-
- /* refcount is held by phy_connect_direct() on success */
- put_device(&phy->mdio.dev);
-
- return ret ? NULL : phy;
-}
-EXPORT_SYMBOL(of_phy_connect);
-
-/**
- * of_phy_get_and_connect
- * - Get phy node and connect to the phy described in the device tree
- * @dev: pointer to net_device claiming the phy
- * @np: Pointer to device tree node for the net_device claiming the phy
- * @hndlr: Link state callback for the network device
- *
- * If successful, returns a pointer to the phy_device with the embedded
- * struct device refcount incremented by one, or NULL on failure. The
- * refcount must be dropped by calling phy_disconnect() or phy_detach().
- */
-struct phy_device *of_phy_get_and_connect(struct net_device *dev,
- struct device_node *np,
- void (*hndlr)(struct net_device *))
-{
- phy_interface_t iface;
- struct device_node *phy_np;
- struct phy_device *phy;
- int ret;
-
- ret = of_get_phy_mode(np, &iface);
- if (ret)
- return NULL;
- if (of_phy_is_fixed_link(np)) {
- ret = of_phy_register_fixed_link(np);
- if (ret < 0) {
- netdev_err(dev, "broken fixed-link specification\n");
- return NULL;
- }
- phy_np = of_node_get(np);
- } else {
- phy_np = of_parse_phandle(np, "phy-handle", 0);
- if (!phy_np)
- return NULL;
- }
-
- phy = of_phy_connect(dev, phy_np, hndlr, 0, iface);
-
- of_node_put(phy_np);
-
- return phy;
-}
-EXPORT_SYMBOL(of_phy_get_and_connect);
-
-/**
- * of_phy_attach - Attach to a PHY without starting the state machine
- * @dev: pointer to net_device claiming the phy
- * @phy_np: Node pointer for the PHY
- * @flags: flags to pass to the PHY
- * @iface: PHY data interface type
- *
- * If successful, returns a pointer to the phy_device with the embedded
- * struct device refcount incremented by one, or NULL on failure. The
- * refcount must be dropped by calling phy_disconnect() or phy_detach().
- */
-struct phy_device *of_phy_attach(struct net_device *dev,
- struct device_node *phy_np, u32 flags,
- phy_interface_t iface)
-{
- struct phy_device *phy = of_phy_find_device(phy_np);
- int ret;
-
- if (!phy)
- return NULL;
-
- ret = phy_attach_direct(dev, phy, flags, iface);
-
- /* refcount is held by phy_attach_direct() on success */
- put_device(&phy->mdio.dev);
-
- return ret ? NULL : phy;
-}
-EXPORT_SYMBOL(of_phy_attach);
-
-/*
- * of_phy_is_fixed_link() and of_phy_register_fixed_link() must
- * support two DT bindings:
- * - the old DT binding, where 'fixed-link' was a property with 5
- * cells encoding various informations about the fixed PHY
- * - the new DT binding, where 'fixed-link' is a sub-node of the
- * Ethernet device.
- */
-bool of_phy_is_fixed_link(struct device_node *np)
-{
- struct device_node *dn;
- int len, err;
- const char *managed;
-
- /* New binding */
- dn = of_get_child_by_name(np, "fixed-link");
- if (dn) {
- of_node_put(dn);
- return true;
- }
-
- err = of_property_read_string(np, "managed", &managed);
- if (err == 0 && strcmp(managed, "auto") != 0)
- return true;
-
- /* Old binding */
- if (of_get_property(np, "fixed-link", &len) &&
- len == (5 * sizeof(__be32)))
- return true;
-
- return false;
-}
-EXPORT_SYMBOL(of_phy_is_fixed_link);
-
-int of_phy_register_fixed_link(struct device_node *np)
-{
- struct fixed_phy_status status = {};
- struct device_node *fixed_link_node;
- u32 fixed_link_prop[5];
- const char *managed;
-
- if (of_property_read_string(np, "managed", &managed) == 0 &&
- strcmp(managed, "in-band-status") == 0) {
- /* status is zeroed, namely its .link member */
- goto register_phy;
- }
-
- /* New binding */
- fixed_link_node = of_get_child_by_name(np, "fixed-link");
- if (fixed_link_node) {
- status.link = 1;
- status.duplex = of_property_read_bool(fixed_link_node,
- "full-duplex");
- if (of_property_read_u32(fixed_link_node, "speed",
- &status.speed)) {
- of_node_put(fixed_link_node);
- return -EINVAL;
- }
- status.pause = of_property_read_bool(fixed_link_node, "pause");
- status.asym_pause = of_property_read_bool(fixed_link_node,
- "asym-pause");
- of_node_put(fixed_link_node);
-
- goto register_phy;
- }
-
- /* Old binding */
- if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop,
- ARRAY_SIZE(fixed_link_prop)) == 0) {
- status.link = 1;
- status.duplex = fixed_link_prop[1];
- status.speed = fixed_link_prop[2];
- status.pause = fixed_link_prop[3];
- status.asym_pause = fixed_link_prop[4];
- goto register_phy;
- }
-
- return -ENODEV;
-
-register_phy:
- return PTR_ERR_OR_ZERO(fixed_phy_register(PHY_POLL, &status, np));
-}
-EXPORT_SYMBOL(of_phy_register_fixed_link);
-
-void of_phy_deregister_fixed_link(struct device_node *np)
-{
- struct phy_device *phydev;
-
- phydev = of_phy_find_device(np);
- if (!phydev)
- return;
-
- fixed_phy_unregister(phydev);
-
- put_device(&phydev->mdio.dev); /* of_phy_find_device() */
- phy_device_free(phydev); /* fixed_phy_register() */
-}
-EXPORT_SYMBOL(of_phy_deregister_fixed_link);
projects / kernel.git / commitdiff