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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Driver for the Renesas PHY uPD60620.4 *5 * Copyright (C) 2015 Softing Industrial Automation GmbH6 */7 8#include <linux/kernel.h>9#include <linux/module.h>10#include <linux/phy.h>11 12#define UPD60620_PHY_ID 0xb824282413 14/* Extended Registers and values */15/* PHY Special Control/Status */16#define PHY_PHYSCR 0x1F /* PHY.31 */17#define PHY_PHYSCR_10MB 0x0004 /* PHY speed = 10mb */18#define PHY_PHYSCR_100MB 0x0008 /* PHY speed = 100mb */19#define PHY_PHYSCR_DUPLEX 0x0010 /* PHY Duplex */20 21/* PHY Special Modes */22#define PHY_SPM 0x12 /* PHY.18 */23 24/* Init PHY */25 26static int upd60620_config_init(struct phy_device *phydev)27{28 /* Enable support for passive HUBs (could be a strap option) */29 /* PHYMODE: All speeds, HD in parallel detect */30 return phy_write(phydev, PHY_SPM, 0x0180 | phydev->mdio.addr);31}32 33/* Get PHY status from common registers */34 35static int upd60620_read_status(struct phy_device *phydev)36{37 int phy_state;38 39 /* Read negotiated state */40 phy_state = phy_read(phydev, MII_BMSR);41 if (phy_state < 0)42 return phy_state;43 44 phydev->link = 0;45 linkmode_zero(phydev->lp_advertising);46 phydev->pause = 0;47 phydev->asym_pause = 0;48 49 if (phy_state & (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) {50 phy_state = phy_read(phydev, PHY_PHYSCR);51 if (phy_state < 0)52 return phy_state;53 54 if (phy_state & (PHY_PHYSCR_10MB | PHY_PHYSCR_100MB)) {55 phydev->link = 1;56 phydev->speed = SPEED_10;57 phydev->duplex = DUPLEX_HALF;58 59 if (phy_state & PHY_PHYSCR_100MB)60 phydev->speed = SPEED_100;61 if (phy_state & PHY_PHYSCR_DUPLEX)62 phydev->duplex = DUPLEX_FULL;63 64 phy_state = phy_read(phydev, MII_LPA);65 if (phy_state < 0)66 return phy_state;67 68 mii_lpa_to_linkmode_lpa_t(phydev->lp_advertising,69 phy_state);70 71 phy_resolve_aneg_pause(phydev);72 }73 }74 return 0;75}76 77MODULE_DESCRIPTION("Renesas uPD60620 PHY driver");78MODULE_AUTHOR("Bernd Edlinger <bernd.edlinger@hotmail.de>");79MODULE_LICENSE("GPL");80 81static struct phy_driver upd60620_driver[1] = { {82 .phy_id = UPD60620_PHY_ID,83 .phy_id_mask = 0xfffffffe,84 .name = "Renesas uPD60620",85 /* PHY_BASIC_FEATURES */86 .flags = 0,87 .config_init = upd60620_config_init,88 .read_status = upd60620_read_status,89} };90 91module_phy_driver(upd60620_driver);92 93static struct mdio_device_id __maybe_unused upd60620_tbl[] = {94 { UPD60620_PHY_ID, 0xfffffffe },95 { }96};97 98MODULE_DEVICE_TABLE(mdio, upd60620_tbl);99