LXR linux/drivers/net/phy/teranetics.c

   1/*
   2 * Driver for Teranetics PHY
   3 *
   4 * Author: Shaohui Xie <Shaohui.Xie@freescale.com>
   5 *
   6 * Copyright 2015 Freescale Semiconductor, Inc.
   7 *
   8 * This file is licensed under the terms of the GNU General Public License
   9 * version 2.  This program is licensed "as is" without any warranty of any
  10 * kind, whether express or implied.
  11 */
  12
  13#include <linux/kernel.h>
  14#include <linux/module.h>
  15#include <linux/mii.h>
  16#include <linux/ethtool.h>
  17#include <linux/mdio.h>
  18#include <linux/phy.h>
  19
  20MODULE_DESCRIPTION("Teranetics PHY driver");
  21MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
  22MODULE_LICENSE("GPL v2");
  23
  24#define PHY_ID_TN2020   0x00a19410
  25#define MDIO_PHYXS_LNSTAT_SYNC0 0x0001
  26#define MDIO_PHYXS_LNSTAT_SYNC1 0x0002
  27#define MDIO_PHYXS_LNSTAT_SYNC2 0x0004
  28#define MDIO_PHYXS_LNSTAT_SYNC3 0x0008
  29#define MDIO_PHYXS_LNSTAT_ALIGN 0x1000
  30
  31#define MDIO_PHYXS_LANE_READY   (MDIO_PHYXS_LNSTAT_SYNC0 | \
  32                                MDIO_PHYXS_LNSTAT_SYNC1 | \
  33                                MDIO_PHYXS_LNSTAT_SYNC2 | \
  34                                MDIO_PHYXS_LNSTAT_SYNC3 | \
  35                                MDIO_PHYXS_LNSTAT_ALIGN)
  36
  37static int teranetics_config_init(struct phy_device *phydev)
  38{
  39        phydev->supported = SUPPORTED_10000baseT_Full;
  40        phydev->advertising = SUPPORTED_10000baseT_Full;
  41
  42        return 0;
  43}
  44
  45static int teranetics_soft_reset(struct phy_device *phydev)
  46{
  47        return 0;
  48}
  49
  50static int teranetics_aneg_done(struct phy_device *phydev)
  51{
  52        int reg;
  53
  54        /* auto negotiation state can only be checked when using copper
  55         * port, if using fiber port, just lie it's done.
  56         */
  57        if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
  58                reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
  59                return (reg < 0) ? reg : (reg & BMSR_ANEGCOMPLETE);
  60        }
  61
  62        return 1;
  63}
  64
  65static int teranetics_config_aneg(struct phy_device *phydev)
  66{
  67        return 0;
  68}
  69
  70static int teranetics_read_status(struct phy_device *phydev)
  71{
  72        int reg;
  73
  74        phydev->link = 1;
  75
  76        phydev->speed = SPEED_10000;
  77        phydev->duplex = DUPLEX_FULL;
  78
  79        if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
  80                reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT);
  81                if (reg < 0 ||
  82                    !((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) {
  83                        phydev->link = 0;
  84                        return 0;
  85                }
  86
  87                reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
  88                if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
  89                        phydev->link = 0;
  90        }
  91
  92        return 0;
  93}
  94
  95static int teranetics_match_phy_device(struct phy_device *phydev)
  96{
  97        return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020;
  98}
  99
 100static struct phy_driver teranetics_driver[] = {
 101{
 102        .phy_id         = PHY_ID_TN2020,
 103        .phy_id_mask    = 0xffffffff,
 104        .name           = "Teranetics TN2020",
 105        .soft_reset     = teranetics_soft_reset,
 106        .aneg_done      = teranetics_aneg_done,
 107        .config_init    = teranetics_config_init,
 108        .config_aneg    = teranetics_config_aneg,
 109        .read_status    = teranetics_read_status,
 110        .match_phy_device = teranetics_match_phy_device,
 111},
 112};
 113
 114module_phy_driver(teranetics_driver);
 115
 116static struct mdio_device_id __maybe_unused teranetics_tbl[] = {
 117        { PHY_ID_TN2020, 0xffffffff },
 118        { }
 119};
 120
 121MODULE_DEVICE_TABLE(mdio, teranetics_tbl);
 122