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e430815f5a
Backport PHY package MMD patch merged upstream that add support for writing MMD regs for the PHY package and support for writing to PHY package at an offset. All affected patches automatically refreshed. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
197 lines
5.9 KiB
Diff
197 lines
5.9 KiB
Diff
From d63710fc0f1a501fd75a7025e3070a96ffa1645f Mon Sep 17 00:00:00 2001
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From: Christian Marangi <ansuelsmth@gmail.com>
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Date: Fri, 15 Dec 2023 14:15:34 +0100
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Subject: [PATCH 4/4] net: phy: add support for PHY package MMD read/write
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Some PHY in PHY package may require to read/write MMD regs to correctly
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configure the PHY package.
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Add support for these additional required function in both lock and no
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lock variant.
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It's assumed that the entire PHY package is either C22 or C45. We use
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C22 or C45 way of writing/reading to mmd regs based on the passed phydev
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whether it's C22 or C45.
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Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/phy/phy-core.c | 140 +++++++++++++++++++++++++++++++++++++
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include/linux/phy.h | 16 +++++
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2 files changed, 156 insertions(+)
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--- a/drivers/net/phy/phy-core.c
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+++ b/drivers/net/phy/phy-core.c
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@@ -639,6 +639,146 @@ int phy_write_mmd(struct phy_device *phy
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EXPORT_SYMBOL(phy_write_mmd);
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/**
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+ * __phy_package_read_mmd - read MMD reg relative to PHY package base addr
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+ * @phydev: The phy_device struct
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+ * @addr_offset: The offset to be added to PHY package base_addr
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+ * @devad: The MMD to read from
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+ * @regnum: The register on the MMD to read
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+ *
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+ * Convenience helper for reading a register of an MMD on a given PHY
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+ * using the PHY package base address. The base address is added to
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+ * the addr_offset value.
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+ *
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+ * Same calling rules as for __phy_read();
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+ *
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+ * NOTE: It's assumed that the entire PHY package is either C22 or C45.
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+ */
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+int __phy_package_read_mmd(struct phy_device *phydev,
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+ unsigned int addr_offset, int devad,
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+ u32 regnum)
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+{
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+ int addr = phy_package_address(phydev, addr_offset);
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+
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+ if (addr < 0)
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+ return addr;
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+
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+ if (regnum > (u16)~0 || devad > 32)
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+ return -EINVAL;
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+
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+ return mmd_phy_read(phydev->mdio.bus, addr, phydev->is_c45, devad,
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+ regnum);
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+}
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+EXPORT_SYMBOL(__phy_package_read_mmd);
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+
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+/**
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+ * phy_package_read_mmd - read MMD reg relative to PHY package base addr
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+ * @phydev: The phy_device struct
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+ * @addr_offset: The offset to be added to PHY package base_addr
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+ * @devad: The MMD to read from
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+ * @regnum: The register on the MMD to read
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+ *
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+ * Convenience helper for reading a register of an MMD on a given PHY
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+ * using the PHY package base address. The base address is added to
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+ * the addr_offset value.
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+ *
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+ * Same calling rules as for phy_read();
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+ *
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+ * NOTE: It's assumed that the entire PHY package is either C22 or C45.
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+ */
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+int phy_package_read_mmd(struct phy_device *phydev,
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+ unsigned int addr_offset, int devad,
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+ u32 regnum)
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+{
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+ int addr = phy_package_address(phydev, addr_offset);
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+ int val;
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+
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+ if (addr < 0)
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+ return addr;
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+
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+ if (regnum > (u16)~0 || devad > 32)
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+ return -EINVAL;
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+
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+ phy_lock_mdio_bus(phydev);
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+ val = mmd_phy_read(phydev->mdio.bus, addr, phydev->is_c45, devad,
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+ regnum);
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+ phy_unlock_mdio_bus(phydev);
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+
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+ return val;
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+}
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+EXPORT_SYMBOL(phy_package_read_mmd);
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+
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+/**
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+ * __phy_package_write_mmd - write MMD reg relative to PHY package base addr
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+ * @phydev: The phy_device struct
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+ * @addr_offset: The offset to be added to PHY package base_addr
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+ * @devad: The MMD to write to
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+ * @regnum: The register on the MMD to write
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+ * @val: value to write to @regnum
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+ *
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+ * Convenience helper for writing a register of an MMD on a given PHY
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+ * using the PHY package base address. The base address is added to
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+ * the addr_offset value.
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+ *
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+ * Same calling rules as for __phy_write();
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+ *
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+ * NOTE: It's assumed that the entire PHY package is either C22 or C45.
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+ */
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+int __phy_package_write_mmd(struct phy_device *phydev,
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+ unsigned int addr_offset, int devad,
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+ u32 regnum, u16 val)
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+{
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+ int addr = phy_package_address(phydev, addr_offset);
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+
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+ if (addr < 0)
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+ return addr;
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+
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+ if (regnum > (u16)~0 || devad > 32)
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+ return -EINVAL;
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+
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+ return mmd_phy_write(phydev->mdio.bus, addr, phydev->is_c45, devad,
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+ regnum, val);
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+}
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+EXPORT_SYMBOL(__phy_package_write_mmd);
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+
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+/**
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+ * phy_package_write_mmd - write MMD reg relative to PHY package base addr
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+ * @phydev: The phy_device struct
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+ * @addr_offset: The offset to be added to PHY package base_addr
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+ * @devad: The MMD to write to
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+ * @regnum: The register on the MMD to write
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+ * @val: value to write to @regnum
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+ *
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+ * Convenience helper for writing a register of an MMD on a given PHY
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+ * using the PHY package base address. The base address is added to
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+ * the addr_offset value.
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+ *
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+ * Same calling rules as for phy_write();
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+ *
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+ * NOTE: It's assumed that the entire PHY package is either C22 or C45.
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+ */
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+int phy_package_write_mmd(struct phy_device *phydev,
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+ unsigned int addr_offset, int devad,
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+ u32 regnum, u16 val)
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+{
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+ int addr = phy_package_address(phydev, addr_offset);
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+ int ret;
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+
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+ if (addr < 0)
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+ return addr;
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+
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+ if (regnum > (u16)~0 || devad > 32)
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+ return -EINVAL;
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+
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+ phy_lock_mdio_bus(phydev);
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+ ret = mmd_phy_write(phydev->mdio.bus, addr, phydev->is_c45, devad,
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+ regnum, val);
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+ phy_unlock_mdio_bus(phydev);
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+
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+ return ret;
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+}
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+EXPORT_SYMBOL(phy_package_write_mmd);
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+
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+/**
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* phy_modify_changed - Function for modifying a PHY register
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* @phydev: the phy_device struct
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* @regnum: register number to modify
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--- a/include/linux/phy.h
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+++ b/include/linux/phy.h
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@@ -1840,6 +1840,22 @@ static inline int __phy_package_write(st
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return __mdiobus_write(phydev->mdio.bus, addr, regnum, val);
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}
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+int __phy_package_read_mmd(struct phy_device *phydev,
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+ unsigned int addr_offset, int devad,
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+ u32 regnum);
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+
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+int phy_package_read_mmd(struct phy_device *phydev,
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+ unsigned int addr_offset, int devad,
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+ u32 regnum);
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+
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+int __phy_package_write_mmd(struct phy_device *phydev,
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+ unsigned int addr_offset, int devad,
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+ u32 regnum, u16 val);
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+
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+int phy_package_write_mmd(struct phy_device *phydev,
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+ unsigned int addr_offset, int devad,
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+ u32 regnum, u16 val);
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+
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static inline bool __phy_package_set_once(struct phy_device *phydev,
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unsigned int b)
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{
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