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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/mdio.h
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@@ -1,10 +1,7 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * linux/mdio.h: definitions for MDIO (clause 45) transceivers
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  * Copyright 2006-2009 Solarflare Communications Inc.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License version 2 as published
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- * by the Free Software Foundation, incorporated herein by reference.
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  */
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 #ifndef __LINUX_MDIO_H__
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 #define __LINUX_MDIO_H__
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@@ -12,8 +9,16 @@
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 #include <uapi/linux/mdio.h>
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 #include <linux/mod_devicetable.h>
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11
 
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+/* Or MII_ADDR_C45 into regnum for read/write on mii_bus to enable the 21 bit
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+ * IEEE 802.3ae clause 45 addressing mode used by 10GIGE phy chips.
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+ */
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+#define MII_ADDR_C45		(1<<30)
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+#define MII_DEVADDR_C45_SHIFT	16
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+#define MII_REGADDR_C45_MASK	GENMASK(15, 0)
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+
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 struct gpio_desc;
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 struct mii_bus;
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+struct reset_control;
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 /* Multiple levels of nesting are possible. However typically this is
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  * limited to nested DSA like layer, a MUX layer, and the normal
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@@ -39,7 +44,8 @@
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 	/* Bus address of the MDIO device (0-31) */
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 	int addr;
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 	int flags;
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-	struct gpio_desc *reset;
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+	struct gpio_desc *reset_gpio;
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+	struct reset_control *reset_ctrl;
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 	unsigned int reset_assert_delay;
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 	unsigned int reset_deassert_delay;
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 };
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@@ -72,6 +78,17 @@
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 };
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 #define to_mdio_driver(d)						\
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 	container_of(to_mdio_common_driver(d), struct mdio_driver, mdiodrv)
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+
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+/* device driver data */
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+static inline void mdiodev_set_drvdata(struct mdio_device *mdio, void *data)
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+{
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+	dev_set_drvdata(&mdio->dev, data);
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+}
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+
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+static inline void *mdiodev_get_drvdata(struct mdio_device *mdio)
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+{
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+	return dev_get_drvdata(&mdio->dev);
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+}
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 void mdio_device_free(struct mdio_device *mdiodev);
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 struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr);
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@@ -264,13 +281,91 @@
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 	return reg;
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 }
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+/**
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+ * linkmode_adv_to_mii_10gbt_adv_t
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+ * @advertising: the linkmode advertisement settings
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+ *
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+ * A small helper function that translates linkmode advertisement
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+ * settings to phy autonegotiation advertisements for the C45
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+ * 10GBASE-T AN CONTROL (7.32) register.
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+ */
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+static inline u32 linkmode_adv_to_mii_10gbt_adv_t(unsigned long *advertising)
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+{
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+	u32 result = 0;
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+
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+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
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+			      advertising))
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+		result |= MDIO_AN_10GBT_CTRL_ADV2_5G;
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+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
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+			      advertising))
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+		result |= MDIO_AN_10GBT_CTRL_ADV5G;
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+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
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+			      advertising))
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+		result |= MDIO_AN_10GBT_CTRL_ADV10G;
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+
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+	return result;
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+}
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+
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+/**
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+ * mii_10gbt_stat_mod_linkmode_lpa_t
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+ * @advertising: target the linkmode advertisement settings
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+ * @lpa: value of the C45 10GBASE-T AN STATUS register
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+ *
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+ * A small helper function that translates C45 10GBASE-T AN STATUS register bits
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+ * to linkmode advertisement settings. Other bits in advertising aren't changed.
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+ */
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+static inline void mii_10gbt_stat_mod_linkmode_lpa_t(unsigned long *advertising,
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+						     u32 lpa)
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+{
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+	linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
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+			 advertising, lpa & MDIO_AN_10GBT_STAT_LP2_5G);
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+	linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
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+			 advertising, lpa & MDIO_AN_10GBT_STAT_LP5G);
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+	linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
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+			 advertising, lpa & MDIO_AN_10GBT_STAT_LP10G);
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+}
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+
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 int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
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 int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
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+int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
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+			     u16 mask, u16 set);
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 int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
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 int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum);
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 int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
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 int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val);
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+int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
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+		   u16 set);
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+
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+static inline u32 mdiobus_c45_addr(int devad, u16 regnum)
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+{
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+	return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum;
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+}
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+
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+static inline int __mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
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+				     u16 regnum)
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+{
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+	return __mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum));
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+}
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+
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+static inline int __mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad,
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+				      u16 regnum, u16 val)
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+{
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+	return __mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum),
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+			       val);
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+}
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+
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+static inline int mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
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+				   u16 regnum)
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+{
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+	return mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum));
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+}
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+
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+static inline int mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad,
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+				    u16 regnum, u16 val)
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+{
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+	return mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum), val);
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+}
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 int mdiobus_register_device(struct mdio_device *mdiodev);
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 int mdiobus_unregister_device(struct mdio_device *mdiodev);
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@@ -279,6 +374,7 @@
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 /**
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  * mdio_module_driver() - Helper macro for registering mdio drivers
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+ * @_mdio_driver: driver to register
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  *
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  * Helper macro for MDIO drivers which do not do anything special in module
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  * init/exit. Each module may only use this macro once, and calling it