drivers/net/phy/ste10Xp.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * drivers/net/phy/ste10Xp.c
   4  *
   5  * Driver for STMicroelectronics STe10Xp PHYs
   6  *
   7  * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
   8  *
   9  * Copyright (c) 2008 STMicroelectronics Limited
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/sched.h>
  15 #include <linux/kernel.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/ethtool.h>
  20 #include <linux/mii.h>
  21 #include <linux/phy.h>
  22
  23 #define MII_XCIIS       0x11    /* Configuration Info IRQ & Status Reg */
  24 #define MII_XIE         0x12    /* Interrupt Enable Register */
  25 #define MII_XIE_DEFAULT_MASK 0x0070 /* ANE complete, Remote Fault, Link Down */
  26
  27 #define STE101P_PHY_ID          0x00061c50
  28 #define STE100P_PHY_ID          0x1c040011
  29
  30 static int ste10Xp_config_init(struct phy_device *phydev)
  31 {
  32         int value, err;
  33
  34         /* Software Reset PHY */
  35         value = phy_read(phydev, MII_BMCR);
  36         if (value < 0)
  37                 return value;
  38
  39         value |= BMCR_RESET;
  40         err = phy_write(phydev, MII_BMCR, value);
  41         if (err < 0)
  42                 return err;
  43
  44         do {
  45                 value = phy_read(phydev, MII_BMCR);
  46         } while (value & BMCR_RESET);
  47
  48         return 0;
  49 }
  50
  51 static int ste10Xp_config_intr(struct phy_device *phydev)
  52 {
  53         int err, value;
  54
  55         if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
  56                 /* Enable all STe101P interrupts (PR12) */
  57                 err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK);
  58                 /* clear any pending interrupts */
  59                 if (err == 0) {
  60                         value = phy_read(phydev, MII_XCIIS);
  61                         if (value < 0)
  62                                 err = value;
  63                 }
  64         } else
  65                 err = phy_write(phydev, MII_XIE, 0);
  66
  67         return err;
  68 }
  69
  70 static int ste10Xp_ack_interrupt(struct phy_device *phydev)
  71 {
  72         int err = phy_read(phydev, MII_XCIIS);
  73         if (err < 0)
  74                 return err;
  75
  76         return 0;
  77 }
  78
  79 static struct phy_driver ste10xp_pdriver[] = {
  80 {
  81         .phy_id = STE101P_PHY_ID,
  82         .phy_id_mask = 0xfffffff0,
  83         .name = "STe101p",
  84         /* PHY_BASIC_FEATURES */
  85         .config_init = ste10Xp_config_init,
  86         .ack_interrupt = ste10Xp_ack_interrupt,
  87         .config_intr = ste10Xp_config_intr,
  88         .suspend = genphy_suspend,
  89         .resume = genphy_resume,
  90 }, {
  91         .phy_id = STE100P_PHY_ID,
  92         .phy_id_mask = 0xffffffff,
  93         .name = "STe100p",
  94         /* PHY_BASIC_FEATURES */
  95         .config_init = ste10Xp_config_init,
  96         .ack_interrupt = ste10Xp_ack_interrupt,
  97         .config_intr = ste10Xp_config_intr,
  98         .suspend = genphy_suspend,
  99         .resume = genphy_resume,
 100 } };
 101
 102 module_phy_driver(ste10xp_pdriver);
 103
 104 static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = {
 105         { STE101P_PHY_ID, 0xfffffff0 },
 106         { STE100P_PHY_ID, 0xffffffff },
 107         { }
 108 };
 109
 110 MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl);
 111
 112 MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver");
 113 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
 114 MODULE_LICENSE("GPL");