net/fec: add dual fec support for mx28
This patch is to add mx28 dual fec support. Here are some key notes
for mx28 fec controller.
- The mx28 fec controller naming ENET-MAC is a different IP from FEC
used on other i.mx variants. But they are basically compatible
on software interface, so it's possible to share the same driver.
- ENET-MAC design on mx28 made an improper assumption that it runs
on a big-endian system. As the result, driver has to swap every
frame going to and coming from the controller.
- The external phys can only be configured by fec0, which means fec1
can not work independently and both phys need to be configured by
mii_bus attached on fec0.
- ENET-MAC reset will get mac address registers reset too.
- ENET-MAC MII/RMII mode and 10M/100M speed are configured
differently FEC.
- ETHER_EN bit must be set to get ENET-MAC interrupt work.
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/fec.h b/drivers/net/fec.h
index 2c48b25..ace318d 100644
--- a/drivers/net/fec.h
+++ b/drivers/net/fec.h
@@ -14,7 +14,8 @@
/****************************************************************************/
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
- defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARCH_MXC)
+ defined(CONFIG_M520x) || defined(CONFIG_M532x) || \
+ defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28)
/*
* Just figures, Motorola would have to change the offsets for
* registers in the same peripheral device on different models
@@ -78,7 +79,7 @@
/*
* Define the buffer descriptor structure.
*/
-#ifdef CONFIG_ARCH_MXC
+#if defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28)
struct bufdesc {
unsigned short cbd_datlen; /* Data length */
unsigned short cbd_sc; /* Control and status info */