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

   1 /*
   2  *  Driver for Micrel/Kendin PHYs
   3  *
   4  *  Copyright (c) 2008-2009 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/module.h>
  14 #include <linux/delay.h>
  15 #include <linux/skbuff.h>
  16 #include <linux/phy.h>
  17
  18 #define KSZ_REG_INT_CTRL        0x1b
  19
  20 #define KSZ_INT_LU_EN   (1 << 8)        /* enable Link Up interrupt */
  21 #define KSZ_INT_RF_EN   (1 << 9)        /* enable Remote Fault interrupt */
  22 #define KSZ_INT_LD_EN   (1 << 10)       /* enable Link Down interrupt */
  23
  24 #define KSZ_INT_INIT    (KSZ_INT_LU_EN | KSZ_INT_LD_EN)
  25
  26 static int ksz8041_ack_interrupt(struct phy_device *phydev)
  27 {
  28         int err;
  29
  30         err = phy_read(phydev, KSZ_REG_INT_CTRL);
  31
  32         return (err < 0) ? err : 0;
  33 }
  34
  35 static int ksz8041_config_intr(struct phy_device *phydev)
  36 {
  37         int err;
  38
  39         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  40                 err = phy_write(phydev, KSZ_REG_INT_CTRL,
  41                                 KSZ_INT_INIT);
  42         else
  43                 err = phy_write(phydev, KSZ_REG_INT_CTRL, 0);
  44
  45         return err;
  46 }
  47
  48 static struct phy_driver ksz8041_phy_driver = {
  49         .phy_id         = 0x00221512,
  50         .name           = "Micrel KSZ8041",
  51         .phy_id_mask    = 0x001fffff,
  52         .features       = PHY_BASIC_FEATURES,
  53         .flags          = PHY_HAS_INTERRUPT,
  54         .config_aneg    = genphy_config_aneg,
  55         .read_status    = genphy_read_status,
  56         .ack_interrupt  = ksz8041_ack_interrupt,
  57         .config_intr    = ksz8041_config_intr,
  58         .driver = {
  59                 .owner  = THIS_MODULE,
  60         },
  61 };
  62
  63 static int __init micrel_phy_init(void)
  64 {
  65         return phy_driver_register(&ksz8041_phy_driver);
  66 }
  67
  68 static void __exit micrel_phy_exit(void)
  69 {
  70         phy_driver_unregister(&ksz8041_phy_driver);
  71 }
  72
  73 #ifdef MODULE
  74 module_init(micrel_phy_init);
  75 module_exit(micrel_phy_exit);
  76 #else
  77 subsys_initcall(micrel_phy_init);
  78 #endif
  79
  80 MODULE_DESCRIPTION("Micrel/Kendin PHY driver");
  81 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
  82 MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>");
  83 MODULE_LICENSE("GPL v2");