git.openwrt.org Git - openwrt/openwrt.git/blob

   1 From d54ef6aea00e7a6ace439baade6ad0aa38ee4b04 Mon Sep 17 00:00:00 2001
   2 From: Daniel Golle <daniel@makrotopia.org>
   3 Date: Mon, 3 Apr 2023 01:21:57 +0300
   4 Subject: [PATCH 287/326] net: phy: realtek: disable SGMII in-band AN for 2.5G
   5  PHYs
   6
   7 MAC drivers don't use SGMII in-band autonegotiation unless told to do so
   8 in device tree using 'managed = "in-band-status"'. When using MDIO to
   9 access a PHY, in-band-status is unneeded as we have link-status via
  10 MDIO. Switch off SGMII in-band autonegotiation using magic values.
  11
  12 Reported-by: Chen Minqiang <ptpt52@gmail.com>
  13 Reported-by: Chukun Pan <amadeus@jmu.edu.cn>
  14 Reported-by: Yevhen Kolomeiko <jarvis2709@gmail.com>
  15 Tested-by: Yevhen Kolomeiko <jarvis2709@gmail.com>
  16 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
  17 ---
  18  drivers/net/phy/realtek.c | 27 +++++++++++++++++++++++++--
  19  1 file changed, 25 insertions(+), 2 deletions(-)
  20
  21 --- a/drivers/net/phy/realtek.c
  22 +++ b/drivers/net/phy/realtek.c
  23 @@ -786,8 +786,8 @@ static int rtl822x_write_mmd(struct phy_
  24  static int rtl822xb_config_init(struct phy_device *phydev)
  25  {
  26         bool has_2500, has_sgmii;
  27 +       int ret, val;
  28         u16 mode;
  29 -       int ret;
  30
  31         has_2500 = test_bit(PHY_INTERFACE_MODE_2500BASEX,
  32                             phydev->host_interfaces) ||
  33 @@ -837,7 +837,29 @@ static int rtl822xb_config_init(struct p
  34         if (ret < 0)
  35                 return ret;
  36
  37 -       return phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x6f11, 0x8020);
  38 +       ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x6f11, 0x8020);
  39 +       if (ret < 0)
  40 +               return ret;
  41 +
  42 +       /* Disable SGMII AN */
  43 +       ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x7588, 0x2);
  44 +       if (ret < 0)
  45 +               return ret;
  46 +
  47 +       ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x7589, 0x71d0);
  48 +       if (ret < 0)
  49 +               return ret;
  50 +
  51 +       ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x7587, 0x3);
  52 +       if (ret < 0)
  53 +               return ret;
  54 +
  55 +       ret = phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND1, 0x7587,
  56 +                                       val, !(val & BIT(0)), 500, 100000, false);
  57 +       if (ret < 0)
  58 +               return ret;
  59 +
  60 +       return 0;
  61  }
  62
  63  static int rtl822xb_get_rate_matching(struct phy_device *phydev,