| /* |
| * Driver for the Renesas PHY uPD60620. |
| * |
| * Copyright (C) 2015 Softing Industrial Automation GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| */ |
| |
| #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; |
| phydev->lp_advertising = 0; |
| 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; |
| |
| phydev->lp_advertising |
| = mii_lpa_to_ethtool_lpa_t(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", |
| .features = PHY_BASIC_FEATURES, |
| .flags = 0, |
| .config_init = upd60620_config_init, |
| .config_aneg = genphy_config_aneg, |
| .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); |