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rm9200 ethernet driver: board-specific quirk (csb337)

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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>
This commit is contained in:
David Brownell 2009-06-09 11:14:24 -07:00 committed by Ben Warren
parent 189eec7779
commit 7168eba729
1 changed files with 18 additions and 4 deletions
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22
cpu/arm920t/at91rm9200/ether.c
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@ -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);