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-rw-r--r--arch/mips/alchemy/devboards/db1200.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/arch/mips/alchemy/devboards/db1200.c b/arch/mips/alchemy/devboards/db1200.c
index 1181241c505..67219913f09 100644
--- a/arch/mips/alchemy/devboards/db1200.c
+++ b/arch/mips/alchemy/devboards/db1200.c
@@ -66,19 +66,33 @@ static int __init detect_board(void)
{
int bid;
- /* try the PB1200 first */
+ /* try the DB1200 first */
+ bcsr_init(DB1200_BCSR_PHYS_ADDR,
+ DB1200_BCSR_PHYS_ADDR + DB1200_BCSR_HEXLED_OFS);
+ if (BCSR_WHOAMI_DB1200 == BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
+ unsigned short t = bcsr_read(BCSR_HEXLEDS);
+ bcsr_write(BCSR_HEXLEDS, ~t);
+ if (bcsr_read(BCSR_HEXLEDS) != t) {
+ bcsr_write(BCSR_HEXLEDS, t);
+ return 0;
+ }
+ }
+
+ /* okay, try the PB1200 then */
bcsr_init(PB1200_BCSR_PHYS_ADDR,
PB1200_BCSR_PHYS_ADDR + PB1200_BCSR_HEXLED_OFS);
bid = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
if ((bid == BCSR_WHOAMI_PB1200_DDR1) ||
- (bid == BCSR_WHOAMI_PB1200_DDR2))
- return 0;
+ (bid == BCSR_WHOAMI_PB1200_DDR2)) {
+ unsigned short t = bcsr_read(BCSR_HEXLEDS);
+ bcsr_write(BCSR_HEXLEDS, ~t);
+ if (bcsr_read(BCSR_HEXLEDS) != t) {
+ bcsr_write(BCSR_HEXLEDS, t);
+ return 0;
+ }
+ }
- /* okay, try the DB1200 then */
- bcsr_init(DB1200_BCSR_PHYS_ADDR,
- DB1200_BCSR_PHYS_ADDR + DB1200_BCSR_HEXLED_OFS);
- bid = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
- return bid == BCSR_WHOAMI_DB1200 ? 0 : 1;
+ return 1; /* it's neither */
}
void __init board_setup(void)