// SPDX-License-Identifier: GPL-2.0+ /* * Driver for the Renesas PHY uPD60620. * * Copyright (C) 2015 Softing Industrial Automation GmbH */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/phy.h> #define UPD60620_PHY_ID 0xb8242824 /* Extended Registers and values */ /* PHY Special Control/Status */ #define PHY_PHYSCR 0x1F /* PHY.31 */ #define PHY_PHYSCR_10MB 0x0004 /* PHY speed = 10mb */ #define PHY_PHYSCR_100MB 0x0008 /* PHY speed = 100mb */ #define PHY_PHYSCR_DUPLEX 0x0010 /* PHY Duplex */ /* PHY Special Modes */ #define PHY_SPM 0x12 /* PHY.18 */ /* Init PHY */ static int upd60620_config_init(struct phy_device *phydev) { /* Enable support for passive HUBs (could be a strap option) */ /* PHYMODE: All speeds, HD in parallel detect */ return phy_write(phydev, PHY_SPM, 0x0180 | phydev->mdio.addr); } /* Get PHY status from common registers */ static int upd60620_read_status(struct phy_device *phydev) { int phy_state; /* Read negotiated state */ phy_state = phy_read(phydev, MII_BMSR); if (phy_state < 0) return phy_state; phydev->link = 0; linkmode_zero(phydev->lp_advertising); phydev->pause = 0; phydev->asym_pause = 0; if (phy_state & (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) { phy_state = phy_read(phydev, PHY_PHYSCR); if (phy_state < 0) return phy_state; if (phy_state & (PHY_PHYSCR_10MB | PHY_PHYSCR_100MB)) { phydev->link = 1; phydev->speed = SPEED_10; phydev->duplex = DUPLEX_HALF; if (phy_state & PHY_PHYSCR_100MB) phydev->speed = SPEED_100; if (phy_state & PHY_PHYSCR_DUPLEX) phydev->duplex = DUPLEX_FULL; phy_state = phy_read(phydev, MII_LPA); if (phy_state < 0) return phy_state; mii_lpa_to_linkmode_lpa_t(phydev->lp_advertising, phy_state); if (phydev->duplex == DUPLEX_FULL) { if (phy_state & LPA_PAUSE_CAP) phydev->pause = 1; if (phy_state & LPA_PAUSE_ASYM) phydev->asym_pause = 1; } } } return 0; } MODULE_DESCRIPTION("Renesas uPD60620 PHY driver"); MODULE_AUTHOR("Bernd Edlinger <bernd.edlinger@hotmail.de>"); MODULE_LICENSE("GPL"); static struct phy_driver upd60620_driver[1] = { { .phy_id = UPD60620_PHY_ID, .phy_id_mask = 0xfffffffe, .name = "Renesas uPD60620", /* PHY_BASIC_FEATURES */ .flags = 0, .config_init = upd60620_config_init, .read_status = upd60620_read_status, } }; module_phy_driver(upd60620_driver); static struct mdio_device_id __maybe_unused upd60620_tbl[] = { { UPD60620_PHY_ID, 0xfffffffe }, { } }; MODULE_DEVICE_TABLE(mdio, upd60620_tbl);