1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for the Renesas PHY uPD60620. 4 * 5 * Copyright (C) 2015 Softing Industrial Automation GmbH 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/module.h> 10 #include <linux/phy.h> 11 12 #define UPD60620_PHY_ID 0xb8242824 13 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 26 static 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 35 static 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 77 MODULE_DESCRIPTION("Renesas uPD60620 PHY driver"); 78 MODULE_AUTHOR("Bernd Edlinger <bernd.edlinger@hotmail.de>"); 79 MODULE_LICENSE("GPL"); 80 81 static 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 91 module_phy_driver(upd60620_driver); 92 93 static struct mdio_device_id __maybe_unused upd60620_tbl[] = { 94 { UPD60620_PHY_ID, 0xfffffffe }, 95 { } 96 }; 97 98 MODULE_DEVICE_TABLE(mdio, upd60620_tbl); 99