target/linux/leon/patches/018-greth_compat_mode.patch

   1 From a498d7076ee0f82ec3f508293a9cf1ccba15829e Mon Sep 17 00:00:00 2001
   2 From: Daniel Hellstrom <daniel@gaisler.com>
   3 Date: Wed, 1 Dec 2010 16:52:19 +0100
   4 Subject: [PATCH] GRETH: added greth_compat_mode module parameter
   5
   6 The greth_compat_mode option can be used to set a GRETH GBit capable MAC
   7 in operate as if the GRETH 10/100 device was found. The GRETH GBit supports
   8 TCP/UDP checksum offloading, unaligned frame buffers, scatter gather etc.
   9 Enabling this mode allows the developer to test the GRETH 10/100 device
  10 without all features mentioned above on a GBit MAC capable of the above.
  11
  12 Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
  13 ---
  14  drivers/net/greth.c |    9 +++++++++
  15  1 files changed, 9 insertions(+), 0 deletions(-)
  16
  17 --- a/drivers/net/greth.c
  18 +++ b/drivers/net/greth.c
  19 @@ -70,6 +70,11 @@ static int no_gbit = 0;
  20  module_param(no_gbit, int, S_IRUGO);
  21  MODULE_PARM_DESC(no_gbit, "GRETH report GBit not supported by MAC enable. Only affects GRETH GBit MAC, default 0 (off).");
  22
  23 +/* Use this option to enable GRETH 10/100 code on GRETH_GBIT hardware (debug legacy code option) */
  24 +static int compat_mode = 0;
  25 +module_param(compat_mode, int, S_IRUGO);
  26 +MODULE_PARM_DESC(compat_mode, "GRETH 10/100 legacy mode enable. Only affects GRETH GBit MAC, default 0 (off).");
  27 +
  28  static int greth_open(struct net_device *dev);
  29  static netdev_tx_t greth_start_xmit(struct sk_buff *skb,
  30            struct net_device *dev);
  31 @@ -1452,6 +1457,10 @@ static int __devinit greth_of_probe(stru
  32         else
  33                 greth->gbit_phy_support = 0;
  34
  35 +       /* Force GBit MAC in legacy 10/100 mode (no offloading etc.) */
  36 +       if (compat_mode == 1)
  37 +               greth->gbit_mac = 0;
  38 +
  39         /* Check for multicast capability */
  40         greth->multicast = (tmp >> 25) & 1;
  41