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authorDavid Brownell <david-b@pacbell.net>2009-06-09 11:14:24 -0700
committerBen Warren <biggerbadderben@gmail.com>2009-07-22 22:39:23 -0700
commit7168eba729b9e6d730db7cd1028767f7b1a6128b (patch)
treec108bb191f0fd951215a6b3aaf74cf2cc94bd3b2 /cpu/arm920t/at91rm9200
parent189eec77795553157c087cd45555695fb3ce2433 (diff)
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rm9200 ethernet driver: board-specific quirk (csb337)
CSB337 boards originally shipped with MicroMonitor, not U-Boot; and with a version using a different convention for recording Ethernet addresses than anyone else. To avoid breaking Linux when it uses U-Boot, have it use the same convention on that hardware. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Diffstat (limited to 'cpu/arm920t/at91rm9200')
-rw-r--r--cpu/arm920t/at91rm9200/ether.c22
1 files changed, 18 insertions, 4 deletions
diff --git a/cpu/arm920t/at91rm9200/ether.c b/cpu/arm920t/at91rm9200/ether.c
index d9d33a2..91eab95 100644
--- a/cpu/arm920t/at91rm9200/ether.c
+++ b/cpu/arm920t/at91rm9200/ether.c
@@ -24,6 +24,7 @@
#include <at91rm9200_net.h>
#include <net.h>
#include <miiphy.h>
+#include <asm/mach-types.h>
/* ----- Ethernet Buffer definitions ----- */
@@ -184,7 +185,7 @@ int eth_init (bd_t * bd)
p_mac->EMAC_CFG |= AT91C_EMAC_CSR; /* Clear statistics */
- /* Init Ehternet buffers */
+ /* Init Ethernet buffers */
for (i = 0; i < RBF_FRAMEMAX; i++) {
rbfdt[i].addr = (unsigned long)rbf_framebuf[i];
rbfdt[i].size = 0;
@@ -193,9 +194,22 @@ int eth_init (bd_t * bd)
rbfp = &rbfdt[0];
eth_getenv_enetaddr("ethaddr", enetaddr);
- p_mac->EMAC_SA2L = (enetaddr[3] << 24) | (enetaddr[2] << 16)
- | (enetaddr[1] << 8) | (enetaddr[0]);
- p_mac->EMAC_SA2H = (enetaddr[5] << 8) | (enetaddr[4]);
+
+ /* The CSB337 originally used a version of the MicroMonitor bootloader
+ * which saved Ethernet addresses in the "wrong" order. Operating
+ * systems (like Linux) know this, and apply a workaround. Replicate
+ * that MicroMonitor behavior so we avoid needing to make such OS code
+ * care about which bootloader was used.
+ */
+ if (machine_is_csb337()) {
+ p_mac->EMAC_SA2H = (enetaddr[0] << 8) | (enetaddr[1]);
+ p_mac->EMAC_SA2L = (enetaddr[2] << 24) | (enetaddr[3] << 16)
+ | (enetaddr[4] << 8) | (enetaddr[5]);
+ } else {
+ p_mac->EMAC_SA2L = (enetaddr[3] << 24) | (enetaddr[2] << 16)
+ | (enetaddr[1] << 8) | (enetaddr[0]);
+ p_mac->EMAC_SA2H = (enetaddr[5] << 8) | (enetaddr[4]);
+ }
p_mac->EMAC_RBQP = (long) (&rbfdt[0]);
p_mac->EMAC_RSR &= ~(AT91C_EMAC_RSR_OVR | AT91C_EMAC_REC | AT91C_EMAC_BNA);