git.sur5r.net Git - u-boot/blob - drivers/net/phy/davicom.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Davicom PHY drivers
   4  *
   5  * Copyright 2010-2011 Freescale Semiconductor, Inc.
   6  * author Andy Fleming
   7  */
   8 #include <phy.h>
   9
  10 #define MIIM_DM9161_SCR                0x10
  11 #define MIIM_DM9161_SCR_INIT   0x0610
  12
  13 /* DM9161 Specified Configuration and Status Register */
  14 #define MIIM_DM9161_SCSR       0x11
  15 #define MIIM_DM9161_SCSR_100F  0x8000
  16 #define MIIM_DM9161_SCSR_100H  0x4000
  17 #define MIIM_DM9161_SCSR_10F   0x2000
  18 #define MIIM_DM9161_SCSR_10H   0x1000
  19
  20 /* DM9161 10BT Configuration/Status */
  21 #define MIIM_DM9161_10BTCSR    0x12
  22 #define MIIM_DM9161_10BTCSR_INIT       0x7800
  23
  24
  25 /* Davicom DM9161E */
  26 static int dm9161_config(struct phy_device *phydev)
  27 {
  28         phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_ISOLATE);
  29         /* Do not bypass the scrambler/descrambler */
  30         phy_write(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_SCR,
  31                         MIIM_DM9161_SCR_INIT);
  32         /* Clear 10BTCSR to default */
  33         phy_write(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_10BTCSR,
  34                         MIIM_DM9161_10BTCSR_INIT);
  35
  36         genphy_config_aneg(phydev);
  37
  38         return 0;
  39 }
  40
  41 static int dm9161_parse_status(struct phy_device *phydev)
  42 {
  43         int mii_reg;
  44
  45         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_DM9161_SCSR);
  46
  47         if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_100H))
  48                 phydev->speed = SPEED_100;
  49         else
  50                 phydev->speed = SPEED_10;
  51
  52         if (mii_reg & (MIIM_DM9161_SCSR_100F | MIIM_DM9161_SCSR_10F))
  53                 phydev->duplex = DUPLEX_FULL;
  54         else
  55                 phydev->duplex = DUPLEX_HALF;
  56
  57         return 0;
  58 }
  59
  60 static int dm9161_startup(struct phy_device *phydev)
  61 {
  62         int ret;
  63
  64         ret = genphy_update_link(phydev);
  65         if (ret)
  66                 return ret;
  67
  68         return dm9161_parse_status(phydev);
  69 }
  70
  71 static struct phy_driver DM9161_driver = {
  72         .name = "Davicom DM9161E",
  73         .uid = 0x181b880,
  74         .mask = 0xffffff0,
  75         .features = PHY_BASIC_FEATURES,
  76         .config = &dm9161_config,
  77         .startup = &dm9161_startup,
  78         .shutdown = &genphy_shutdown,
  79 };
  80
  81 int phy_davicom_init(void)
  82 {
  83         phy_register(&DM9161_driver);
  84
  85         return 0;
  86 }