diff options
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/of_mdio.c | 206 |
1 files changed, 126 insertions, 80 deletions
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c index 9a95831bd06..fb4a5983064 100644 --- a/drivers/of/of_mdio.c +++ b/drivers/of/of_mdio.c @@ -14,6 +14,7 @@ #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> @@ -22,27 +23,6 @@ MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>"); MODULE_LICENSE("GPL"); -static void of_set_phy_supported(struct phy_device *phydev, u32 max_speed) -{ - /* The default values for phydev->supported are provided by the PHY - * driver "features" member, we want to reset to sane defaults fist - * before supporting higher speeds. - */ - phydev->supported &= PHY_DEFAULT_FEATURES; - - switch (max_speed) { - default: - return; - - case SPEED_1000: - phydev->supported |= PHY_1000BT_FEATURES; - case SPEED_100: - phydev->supported |= PHY_100BT_FEATURES; - case SPEED_10: - phydev->supported |= PHY_10BT_FEATURES; - } -} - /* 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) @@ -66,7 +46,6 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *chi struct phy_device *phy; bool is_c45; int rc; - u32 max_speed = 0; u32 phy_id; is_c45 = of_device_is_compatible(child, @@ -103,17 +82,33 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *chi return 1; } - /* Set phydev->supported based on the "max-speed" property - * if present */ - if (!of_property_read_u32(child, "max-speed", &max_speed)) - of_set_phy_supported(phy, max_speed); - dev_dbg(&mdio->dev, "registered phy %s at address %i\n", child->name, addr); return 0; } +static int of_mdio_parse_addr(struct device *dev, const struct device_node *np) +{ + u32 addr; + int ret; + + ret = of_property_read_u32(np, "reg", &addr); + if (ret < 0) { + dev_err(dev, "%s has invalid PHY address\n", np->full_name); + return ret; + } + + /* A PHY must have a reg property in the range [0-31] */ + if (addr >= PHY_MAX_ADDR) { + dev_err(dev, "%s PHY address %i is too large\n", + np->full_name, addr); + return -EINVAL; + } + + return addr; +} + /** * of_mdiobus_register - Register mii_bus and create PHYs from the device tree * @mdio: pointer to mii_bus structure @@ -126,9 +121,8 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) { struct device_node *child; const __be32 *paddr; - u32 addr; bool scanphys = false; - int rc, i, len; + int addr, rc, i; /* Mask out all PHYs from auto probing. Instead the PHYs listed in * the device tree are populated after the bus has been registered */ @@ -148,19 +142,9 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) /* Loop over the child nodes and register a phy_device for each one */ for_each_available_child_of_node(np, child) { - /* A PHY must have a reg property in the range [0-31] */ - paddr = of_get_property(child, "reg", &len); - if (!paddr || len < sizeof(*paddr)) { + addr = of_mdio_parse_addr(&mdio->dev, child); + if (addr < 0) { scanphys = true; - dev_err(&mdio->dev, "%s has invalid PHY address\n", - child->full_name); - continue; - } - - addr = be32_to_cpup(paddr); - if (addr >= PHY_MAX_ADDR) { - dev_err(&mdio->dev, "%s PHY address %i is too large\n", - child->full_name, addr); continue; } @@ -175,7 +159,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) /* auto scan for PHYs with empty reg property */ for_each_available_child_of_node(np, child) { /* Skip PHYs with reg property set */ - paddr = of_get_property(child, "reg", &len); + paddr = of_get_property(child, "reg", NULL); if (paddr) continue; @@ -198,6 +182,40 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) } EXPORT_SYMBOL(of_mdiobus_register); +/** + * of_mdiobus_link_phydev - Find a device node for a phy + * @mdio: pointer to mii_bus structure + * @phydev: phydev for which the of_node pointer should be set + * + * Walk the list of subnodes of a mdio bus and look for a node that matches the + * phy's address with its 'reg' property. If found, set the of_node pointer for + * the phy. This allows auto-probed pyh devices to be supplied with information + * passed in via DT. + */ +void of_mdiobus_link_phydev(struct mii_bus *mdio, + struct phy_device *phydev) +{ + struct device *dev = &phydev->dev; + struct device_node *child; + + if (dev->of_node || !mdio->dev.of_node) + return; + + for_each_available_child_of_node(mdio->dev.of_node, child) { + int addr; + + addr = of_mdio_parse_addr(&mdio->dev, child); + if (addr < 0) + continue; + + if (addr == phydev->addr) { + dev->of_node = child; + return; + } + } +} +EXPORT_SYMBOL(of_mdiobus_link_phydev); + /* Helper function for of_phy_find_device */ static int of_phy_match(struct device *dev, void *phy_np) { @@ -245,44 +263,6 @@ struct phy_device *of_phy_connect(struct net_device *dev, EXPORT_SYMBOL(of_phy_connect); /** - * of_phy_connect_fixed_link - Parse fixed-link property and return a dummy phy - * @dev: pointer to net_device claiming the phy - * @hndlr: Link state callback for the network device - * @iface: PHY data interface type - * - * This function is a temporary stop-gap and will be removed soon. It is - * only to support the fs_enet, ucc_geth and gianfar Ethernet drivers. Do - * not call this function from new drivers. - */ -struct phy_device *of_phy_connect_fixed_link(struct net_device *dev, - void (*hndlr)(struct net_device *), - phy_interface_t iface) -{ - struct device_node *net_np; - char bus_id[MII_BUS_ID_SIZE + 3]; - struct phy_device *phy; - const __be32 *phy_id; - int sz; - - if (!dev->dev.parent) - return NULL; - - net_np = dev->dev.parent->of_node; - if (!net_np) - return NULL; - - phy_id = of_get_property(net_np, "fixed-link", &sz); - if (!phy_id || sz < sizeof(*phy_id)) - return NULL; - - sprintf(bus_id, PHY_ID_FMT, "fixed-0", be32_to_cpu(phy_id[0])); - - phy = phy_connect(dev, bus_id, hndlr, iface); - return IS_ERR(phy) ? NULL : phy; -} -EXPORT_SYMBOL(of_phy_connect_fixed_link); - -/** * 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 @@ -301,3 +281,69 @@ struct phy_device *of_phy_attach(struct net_device *dev, return phy_attach_direct(dev, phy, flags, iface) ? NULL : phy; } EXPORT_SYMBOL(of_phy_attach); + +#if defined(CONFIG_FIXED_PHY) +/* + * 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; + + /* New binding */ + dn = of_get_child_by_name(np, "fixed-link"); + if (dn) { + of_node_put(dn); + 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; + const __be32 *fixed_link_prop; + int len; + + /* 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(np, "full-duplex"); + if (of_property_read_u32(fixed_link_node, "speed", &status.speed)) + return -EINVAL; + status.pause = of_property_read_bool(np, "pause"); + status.asym_pause = of_property_read_bool(np, "asym-pause"); + of_node_put(fixed_link_node); + return fixed_phy_register(PHY_POLL, &status, np); + } + + /* Old binding */ + fixed_link_prop = of_get_property(np, "fixed-link", &len); + if (fixed_link_prop && len == (5 * sizeof(__be32))) { + status.link = 1; + status.duplex = be32_to_cpu(fixed_link_prop[1]); + status.speed = be32_to_cpu(fixed_link_prop[2]); + status.pause = be32_to_cpu(fixed_link_prop[3]); + status.asym_pause = be32_to_cpu(fixed_link_prop[4]); + return fixed_phy_register(PHY_POLL, &status, np); + } + + return -ENODEV; +} +EXPORT_SYMBOL(of_phy_register_fixed_link); +#endif |