target/linux/leon/patches/022-greth_avoid_bad_speed_duplex.patch

   1 From c2e963057ca5635d6e5387623c3ad0c0b3123754 Mon Sep 17 00:00:00 2001
   2 From: Daniel Hellstrom <daniel@gaisler.com>
   3 Date: Wed, 1 Dec 2010 10:28:37 +0100
   4 Subject: [PATCH] GRETH: avoid writing bad speed/duplex when setting transfer mode
   5
   6 Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
   7 ---
   8  drivers/net/greth.c |   19 ++++++++-----------
   9  1 files changed, 8 insertions(+), 11 deletions(-)
  10
  11 --- a/drivers/net/greth.c
  12 +++ b/drivers/net/greth.c
  13 @@ -1236,29 +1236,26 @@ static void greth_link_change(struct net
  14         struct greth_private *greth = netdev_priv(dev);
  15         struct phy_device *phydev = greth->phy;
  16         unsigned long flags;
  17 -
  18         int status_change = 0;
  19 +       u32 ctrl;
  20
  21         spin_lock_irqsave(&greth->devlock, flags);
  22
  23         if (phydev->link) {
  24
  25                 if ((greth->speed != phydev->speed) || (greth->duplex != phydev->duplex)) {
  26 -
  27 -                       GRETH_REGANDIN(greth->regs->control,
  28 -                                      ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB));
  29 +                       ctrl = GRETH_REGLOAD(greth->regs->control) &
  30 +                              ~(GRETH_CTRL_FD | GRETH_CTRL_SP | GRETH_CTRL_GB);
  31
  32                         if (phydev->duplex)
  33 -                               GRETH_REGORIN(greth->regs->control, GRETH_CTRL_FD);
  34 -
  35 -                       if (phydev->speed == SPEED_100) {
  36 -
  37 -                               GRETH_REGORIN(greth->regs->control, GRETH_CTRL_SP);
  38 -                       }
  39 +                               ctrl |= GRETH_CTRL_FD;
  40
  41 +                       if (phydev->speed == SPEED_100)
  42 +                               ctrl |= GRETH_CTRL_SP;
  43                         else if (phydev->speed == SPEED_1000)
  44 -                               GRETH_REGORIN(greth->regs->control, GRETH_CTRL_GB);
  45 +                               ctrl |= GRETH_CTRL_GB;
  46
  47 +                       GRETH_REGSAVE(greth->regs->control, ctrl);
  48                         greth->speed = phydev->speed;
  49                         greth->duplex = phydev->duplex;
  50                         status_change = 1;