drivers/net/phy/aquantia.c

   1 /*
   2  * Driver for Aquantia 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/delay.h>
  16 #include <linux/mii.h>
  17 #include <linux/ethtool.h>
  18 #include <linux/phy.h>
  19 #include <linux/mdio.h>
  20
  21 #define PHY_ID_AQ1202   0x03a1b445
  22 #define PHY_ID_AQ2104   0x03a1b460
  23 #define PHY_ID_AQR105   0x03a1b4a2
  24 #define PHY_ID_AQR405   0x03a1b4b0
  25
  26 #define PHY_AQUANTIA_FEATURES   (SUPPORTED_10000baseT_Full | \
  27                                  SUPPORTED_1000baseT_Full | \
  28                                  SUPPORTED_100baseT_Full | \
  29                                  PHY_DEFAULT_FEATURES)
  30
  31 static int aquantia_config_aneg(struct phy_device *phydev)
  32 {
  33         phydev->supported = PHY_AQUANTIA_FEATURES;
  34         phydev->advertising = phydev->supported;
  35
  36         return 0;
  37 }
  38
  39 static int aquantia_aneg_done(struct phy_device *phydev)
  40 {
  41         int reg;
  42
  43         reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
  44         return (reg < 0) ? reg : (reg & BMSR_ANEGCOMPLETE);
  45 }
  46
  47 static int aquantia_config_intr(struct phy_device *phydev)
  48 {
  49         int err;
  50
  51         if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
  52                 err = phy_write_mmd(phydev, MDIO_MMD_AN, 0xd401, 1);
  53                 if (err < 0)
  54                         return err;
  55
  56                 err = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0xff00, 1);
  57                 if (err < 0)
  58                         return err;
  59
  60                 err = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0xff01, 0x1001);
  61         } else {
  62                 err = phy_write_mmd(phydev, MDIO_MMD_AN, 0xd401, 0);
  63                 if (err < 0)
  64                         return err;
  65
  66                 err = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0xff00, 0);
  67                 if (err < 0)
  68                         return err;
  69
  70                 err = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0xff01, 0);
  71         }
  72
  73         return err;
  74 }
  75
  76 static int aquantia_ack_interrupt(struct phy_device *phydev)
  77 {
  78         int reg;
  79
  80         reg = phy_read_mmd(phydev, MDIO_MMD_AN, 0xcc01);
  81         return (reg < 0) ? reg : 0;
  82 }
  83
  84 static int aquantia_read_status(struct phy_device *phydev)
  85 {
  86         int reg;
  87
  88         reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
  89         reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
  90         if (reg & MDIO_STAT1_LSTATUS)
  91                 phydev->link = 1;
  92         else
  93                 phydev->link = 0;
  94
  95         reg = phy_read_mmd(phydev, MDIO_MMD_AN, 0xc800);
  96         mdelay(10);
  97         reg = phy_read_mmd(phydev, MDIO_MMD_AN, 0xc800);
  98
  99         switch (reg) {
 100         case 0x9:
 101                 phydev->speed = SPEED_2500;
 102                 break;
 103         case 0x5:
 104                 phydev->speed = SPEED_1000;
 105                 break;
 106         case 0x3:
 107                 phydev->speed = SPEED_100;
 108                 break;
 109         case 0x7:
 110         default:
 111                 phydev->speed = SPEED_10000;
 112                 break;
 113         }
 114         phydev->duplex = DUPLEX_FULL;
 115
 116         return 0;
 117 }
 118
 119 static struct phy_driver aquantia_driver[] = {
 120 {
 121         .phy_id         = PHY_ID_AQ1202,
 122         .phy_id_mask    = 0xfffffff0,
 123         .name           = "Aquantia AQ1202",
 124         .features       = PHY_AQUANTIA_FEATURES,
 125         .flags          = PHY_HAS_INTERRUPT,
 126         .aneg_done      = aquantia_aneg_done,
 127         .config_aneg    = aquantia_config_aneg,
 128         .config_intr    = aquantia_config_intr,
 129         .ack_interrupt  = aquantia_ack_interrupt,
 130         .read_status    = aquantia_read_status,
 131 },
 132 {
 133         .phy_id         = PHY_ID_AQ2104,
 134         .phy_id_mask    = 0xfffffff0,
 135         .name           = "Aquantia AQ2104",
 136         .features       = PHY_AQUANTIA_FEATURES,
 137         .flags          = PHY_HAS_INTERRUPT,
 138         .aneg_done      = aquantia_aneg_done,
 139         .config_aneg    = aquantia_config_aneg,
 140         .config_intr    = aquantia_config_intr,
 141         .ack_interrupt  = aquantia_ack_interrupt,
 142         .read_status    = aquantia_read_status,
 143 },
 144 {
 145         .phy_id         = PHY_ID_AQR105,
 146         .phy_id_mask    = 0xfffffff0,
 147         .name           = "Aquantia AQR105",
 148         .features       = PHY_AQUANTIA_FEATURES,
 149         .flags          = PHY_HAS_INTERRUPT,
 150         .aneg_done      = aquantia_aneg_done,
 151         .config_aneg    = aquantia_config_aneg,
 152         .config_intr    = aquantia_config_intr,
 153         .ack_interrupt  = aquantia_ack_interrupt,
 154         .read_status    = aquantia_read_status,
 155 },
 156 {
 157         .phy_id         = PHY_ID_AQR405,
 158         .phy_id_mask    = 0xfffffff0,
 159         .name           = "Aquantia AQR405",
 160         .features       = PHY_AQUANTIA_FEATURES,
 161         .flags          = PHY_HAS_INTERRUPT,
 162         .aneg_done      = aquantia_aneg_done,
 163         .config_aneg    = aquantia_config_aneg,
 164         .config_intr    = aquantia_config_intr,
 165         .ack_interrupt  = aquantia_ack_interrupt,
 166         .read_status    = aquantia_read_status,
 167 },
 168 };
 169
 170 module_phy_driver(aquantia_driver);
 171
 172 static struct mdio_device_id __maybe_unused aquantia_tbl[] = {
 173         { PHY_ID_AQ1202, 0xfffffff0 },
 174         { PHY_ID_AQ2104, 0xfffffff0 },
 175         { PHY_ID_AQR105, 0xfffffff0 },
 176         { PHY_ID_AQR405, 0xfffffff0 },
 177         { }
 178 };
 179
 180 MODULE_DEVICE_TABLE(mdio, aquantia_tbl);
 181
 182 MODULE_DESCRIPTION("Aquantia PHY driver");
 183 MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
 184 MODULE_LICENSE("GPL v2");