| 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 | |
| 42 | |
