target/linux/ar71xx/files/drivers/net/phy/micrel.c

   1 /*
   2  *  Driver for Micrel/Kendin PHYs
   3  *
   4  *  Copyright (c) 2008 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify it
   8  *  under the terms of the GNU General Public License version 2 as published
   9  *  by the Free Software Foundation.
  10  *
  11  */
  12
  13 #include <linux/delay.h>
  14 #include <linux/skbuff.h>
  15 #include <linux/phy.h>
  16
  17 #define KSZ_REG_INT_CTRL        0x1b
  18
  19 #define KSZ_INT_LU_EN   (1 << 8)        /* enable Link Up interrupt */
  20 #define KSZ_INT_RF_EN   (1 << 9)        /* enable Remote Fault interrupt */
  21 #define KSZ_INT_LD_EN   (1 << 10)       /* enable Link Down interrupt */
  22
  23 #define KSZ_INT_INIT    (KSZ_INT_LU_EN | KSZ_INT_LD_EN)
  24
  25 static int ksz8041_ack_interrupt(struct phy_device *phydev)
  26 {
  27         int err;
  28
  29         err = phy_read(phydev, KSZ_REG_INT_CTRL);
  30
  31         return (err < 0) ? err : 0;
  32 }
  33
  34 static int ksz8041_config_intr(struct phy_device *phydev)
  35 {
  36         int err;
  37
  38         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  39                 err = phy_write(phydev, KSZ_REG_INT_CTRL,
  40                                 KSZ_INT_INIT);
  41         else
  42                 err = phy_write(phydev, KSZ_REG_INT_CTRL, 0);
  43
  44         return err;
  45 }
  46
  47 static struct phy_driver ksz8041_phy_driver = {
  48         .phy_id         = 0x00221512,
  49         .name           = "Micrel KSZ8041",
  50         .phy_id_mask    = 0x001fffff,
  51         .features       = PHY_BASIC_FEATURES,
  52         .flags          = PHY_HAS_INTERRUPT,
  53         .config_aneg    = genphy_config_aneg,
  54         .read_status    = genphy_read_status,
  55         .ack_interrupt  = ksz8041_ack_interrupt,
  56         .config_intr    = ksz8041_config_intr,
  57         .driver = {
  58                 .owner  = THIS_MODULE,
  59         },
  60 };
  61
  62 static int __init micrel_phy_init(void)
  63 {
  64         int ret;
  65
  66         ret = phy_driver_register(&ksz8041_phy_driver);
  67
  68         return ret;
  69 }
  70
  71 static void __exit micrel_phy_exit(void)
  72 {
  73         phy_driver_unregister(&ksz8041_phy_driver);
  74 }
  75
  76 module_init(micrel_phy_init);
  77 module_exit(micrel_phy_exit);
  78
  79 MODULE_DESCRIPTION("Micrel/Kendin PHY driver");
  80 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
  81 MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>");
  82 MODULE_LICENSE("GPL v2");