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31afd6bc55
Pass PHY driver pointer to .match_phy_device OP in addition to phydev. Having access to the PHY driver struct might be useful to check the PHY ID of the driver is being matched for in case the PHY ID scanned in the phydev is not consistent. A scenario for this is a PHY that change PHY ID after a firmware is loaded, in such case, the PHY ID stored in PHY device struct is not valid anymore and PHY will manually scan the ID in the match_phy_device function. Having the PHY driver info is also useful for those PHY driver that implement multiple simple .match_phy_device OP to match specific MMD PHY ID. With this extra info if the parsing logic is the same, the matching function can be generalized by using the phy_id in the PHY driver instead of hardcoding. Rust wrapper callback is updated to align to the new match_phy_device arguments. Suggested-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Reviewed-by: Benno Lossin <lossin@kernel.org> # for Rust Reviewed-by: FUJITA Tomonori <fujita.tomonori@gmail.com> Link: https://patch.msgid.link/20250517201353.5137-2-ansuelsmth@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Driver for Teranetics PHY
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*
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* Author: Shaohui Xie <Shaohui.Xie@freescale.com>
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*
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* Copyright 2015 Freescale Semiconductor, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/mdio.h>
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#include <linux/phy.h>
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MODULE_DESCRIPTION("Teranetics PHY driver");
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MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
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MODULE_LICENSE("GPL v2");
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#define PHY_ID_TN2020 0x00a19410
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#define MDIO_PHYXS_LNSTAT_SYNC0 0x0001
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#define MDIO_PHYXS_LNSTAT_SYNC1 0x0002
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#define MDIO_PHYXS_LNSTAT_SYNC2 0x0004
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#define MDIO_PHYXS_LNSTAT_SYNC3 0x0008
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#define MDIO_PHYXS_LNSTAT_ALIGN 0x1000
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#define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \
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MDIO_PHYXS_LNSTAT_SYNC1 | \
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MDIO_PHYXS_LNSTAT_SYNC2 | \
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MDIO_PHYXS_LNSTAT_SYNC3 | \
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MDIO_PHYXS_LNSTAT_ALIGN)
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static int teranetics_aneg_done(struct phy_device *phydev)
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{
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/* auto negotiation state can only be checked when using copper
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* port, if using fiber port, just lie it's done.
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*/
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if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93))
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return genphy_c45_aneg_done(phydev);
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return 1;
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}
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static int teranetics_read_status(struct phy_device *phydev)
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{
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int reg;
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phydev->link = 1;
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phydev->speed = SPEED_10000;
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phydev->duplex = DUPLEX_FULL;
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if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
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reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT);
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if (reg < 0 ||
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!((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) {
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phydev->link = 0;
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return 0;
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}
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reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
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if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
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phydev->link = 0;
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}
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return 0;
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}
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static int teranetics_match_phy_device(struct phy_device *phydev,
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const struct phy_driver *phydrv)
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{
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return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020;
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}
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static struct phy_driver teranetics_driver[] = {
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{
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.phy_id = PHY_ID_TN2020,
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.phy_id_mask = 0xffffffff,
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.name = "Teranetics TN2020",
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.features = PHY_10GBIT_FEATURES,
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.aneg_done = teranetics_aneg_done,
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.config_aneg = gen10g_config_aneg,
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.read_status = teranetics_read_status,
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.match_phy_device = teranetics_match_phy_device,
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},
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};
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module_phy_driver(teranetics_driver);
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static const struct mdio_device_id __maybe_unused teranetics_tbl[] = {
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{ PHY_ID_TN2020, 0xffffffff },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, teranetics_tbl);
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