1 /* 2 * Davicom PHY drivers 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License as 6 * published by the Free Software Foundation; either version 2 of 7 * the License, or (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 17 * MA 02111-1307 USA 18 * 19 * Copyright 2010-2011 Freescale Semiconductor, Inc. 20 * author Andy Fleming 21 * 22 */ 23 #include <phy.h> 24 25 #define MIIM_DM9161_SCR 0x10 26 #define MIIM_DM9161_SCR_INIT 0x0610 27 28 /* DM9161 Specified Configuration and Status Register */ 29 #define MIIM_DM9161_SCSR 0x11 30 #define MIIM_DM9161_SCSR_100F 0x8000 31 #define MIIM_DM9161_SCSR_100H 0x4000 32 #define MIIM_DM9161_SCSR_10F 0x2000 33 #define MIIM_DM9161_SCSR_10H 0x1000 34 35 /* DM9161 10BT Configuration/Status */ 36 #define MIIM_DM9161_10BTCSR 0x12 37 #define MIIM_DM9161_10BTCSR_INIT 0x7800 38 39 40 /* Davicom DM9161E */ 41 static int dm9161_config(struct phy_device *phydev) 42 { 43 phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_ISOLATE); 44 /* Do not bypass the scrambler/descrambler */ 45 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_SCR, 46 MIIM_DM9161_SCR_INIT); 47 /* Clear 10BTCSR to default */ 48 phy_write(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_10BTCSR, 49 MIIM_DM9161_10BTCSR_INIT); 50 51 genphy_config_aneg(phydev); 52 53 return 0; 54 } 55 56 static int dm9161_parse_status(struct phy_device *phydev) 57 { 58 int mii_reg; 59 60 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_SCSR); 61 62 if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_100H)) 63 phydev->speed = SPEED_100; 64 else 65 phydev->speed = SPEED_10; 66 67 if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_10F)) 68 phydev->duplex = DUPLEX_FULL; 69 else 70 phydev->duplex = DUPLEX_HALF; 71 72 return 0; 73 } 74 75 static int dm9161_startup(struct phy_device *phydev) 76 { 77 genphy_update_link(phydev); 78 dm9161_parse_status(phydev); 79 80 return 0; 81 } 82 83 static struct phy_driver DM9161_driver = { 84 .name = "Davicom DM9161E", 85 .uid = 0x181b880, 86 .mask = 0xffffff0, 87 .features = PHY_BASIC_FEATURES, 88 .config = &dm9161_config, 89 .startup = &dm9161_startup, 90 .shutdown = &genphy_shutdown, 91 }; 92 93 int phy_davicom_init(void) 94 { 95 phy_register(&DM9161_driver); 96 97 return 0; 98 } 99