target/linux/generic/files/drivers/net/phy/b53/b53_phy_fixup.c

   1 /*
   2  * B53 PHY Fixup call
   3  *
   4  * Copyright (C) 2013 Jonas Gorski <jogo@openwrt.org>
   5  *
   6  * Permission to use, copy, modify, and/or distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <linux/phy.h>
  22
  23 #define B53_PSEUDO_PHY  0x1e /* Register Access Pseudo PHY */
  24
  25 #define B53_BRCM_OUI_1  0x0143bc00
  26 #define B53_BRCM_OUI_2  0x03625c00
  27 #define B53_BRCM_OUI_3  0x00406000
  28
  29 static int b53_phy_fixup(struct phy_device *dev)
  30 {
  31         u32 phy_id;
  32         struct mii_bus *bus = dev->bus;
  33
  34         if (dev->addr != B53_PSEUDO_PHY)
  35                 return 0;
  36
  37         /* read the first port's id */
  38         phy_id = mdiobus_read(bus, 0, 2) << 16;
  39         phy_id |= mdiobus_read(bus, 0, 3);
  40
  41         if ((phy_id & 0xfffffc00) == B53_BRCM_OUI_1 ||
  42             (phy_id & 0xfffffc00) == B53_BRCM_OUI_2 ||
  43             (phy_id & 0xfffffc00) == B53_BRCM_OUI_3) {
  44                 dev->phy_id = phy_id;
  45         }
  46
  47         return 0;
  48 }
  49
  50 int __init b53_phy_fixup_register(void)
  51 {
  52         return phy_register_fixup_for_id(PHY_ANY_ID, b53_phy_fixup);
  53 }
  54
  55 subsys_initcall(b53_phy_fixup_register);