LXR linux/drivers/net/phy/microchip

   1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (C) 2018 Microchip Technology
   3
   4#include <linux/kernel.h>
   5#include <linux/module.h>
   6#include <linux/mii.h>
   7#include <linux/phy.h>
   8
   9/* Interrupt Source Register */
  10#define LAN87XX_INTERRUPT_SOURCE                (0x18)
  11
  12/* Interrupt Mask Register */
  13#define LAN87XX_INTERRUPT_MASK                  (0x19)
  14#define LAN87XX_MASK_LINK_UP                    (0x0004)
  15#define LAN87XX_MASK_LINK_DOWN                  (0x0002)
  16
  17#define DRIVER_AUTHOR   "Nisar Sayed <nisar.sayed@microchip.com>"
  18#define DRIVER_DESC     "Microchip LAN87XX T1 PHY driver"
  19
  20static int lan87xx_phy_config_intr(struct phy_device *phydev)
  21{
  22        int rc, val = 0;
  23
  24        if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
  25                /* unmask all source and clear them before enable */
  26                rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, 0x7FFF);
  27                rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
  28                val = LAN87XX_MASK_LINK_UP | LAN87XX_MASK_LINK_DOWN;
  29        }
  30
  31        rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val);
  32
  33        return rc < 0 ? rc : 0;
  34}
  35
  36static int lan87xx_phy_ack_interrupt(struct phy_device *phydev)
  37{
  38        int rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
  39
  40        return rc < 0 ? rc : 0;
  41}
  42
  43static struct phy_driver microchip_t1_phy_driver[] = {
  44        {
  45                .phy_id         = 0x0007c150,
  46                .phy_id_mask    = 0xfffffff0,
  47                .name           = "Microchip LAN87xx T1",
  48
  49                .features       = PHY_BASIC_T1_FEATURES,
  50
  51                .config_aneg    = genphy_config_aneg,
  52
  53                .ack_interrupt  = lan87xx_phy_ack_interrupt,
  54                .config_intr    = lan87xx_phy_config_intr,
  55
  56                .suspend        = genphy_suspend,
  57                .resume         = genphy_resume,
  58        }
  59};
  60
  61module_phy_driver(microchip_t1_phy_driver);
  62
  63static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
  64        { 0x0007c150, 0xfffffff0 },
  65        { }
  66};
  67
  68MODULE_DEVICE_TABLE(mdio, microchip_t1_tbl);
  69
  70MODULE_AUTHOR(DRIVER_AUTHOR);
  71MODULE_DESCRIPTION(DRIVER_DESC);
  72MODULE_LICENSE("GPL");
  73