ChangeSet 1.2242, 2005/03/31 08:31:22-08:00, [EMAIL PROTECTED]
[PATCH] ppc32: MPC8555 CPM2 size/pointers for FCCs aka "All-ones
problem"
I've seen that MPC8555 support also made it into linux-2.6 by now.
I don't have hardware and time to test, but it looks like this bug has
made
it over from the linuxppc-2.4 tree. The 8541/8555 has a smaller CPM
DPRAM
than the standard CPM2, just like the 8272.
Unfortunately, the manual recommends you to use a segment of CPM DPRAM
that
is not implemented in the 8541/55. If the smaller DPRAM is not taken
into
account, fcc_enet.c will initialise the internal CPM buffer pointers
(fcc_riptr/fcc_tiptr) to invalid offsets, with the result that all the
FCC
will ever send and receive are 0xff-en.
See also "All-ones problem with FCC1 on MPC8541" ~October 2004 on
linuxppc-embedded.
Signed-off-by: Stefan Nickl <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
cpm2.h | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -Nru a/include/asm-ppc/cpm2.h b/include/asm-ppc/cpm2.h
--- a/include/asm-ppc/cpm2.h 2005-03-31 10:13:11 -08:00
+++ b/include/asm-ppc/cpm2.h 2005-03-31 10:13:11 -08:00
@@ -86,7 +86,7 @@
*/
#define CPM_DATAONLY_BASE ((uint)128)
#define CPM_DP_NOSPACE ((uint)0x7fffffff)
-#ifdef CONFIG_8272
+#if defined(CONFIG_8272) || defined(CONFIG_MPC8555)
#define CPM_DATAONLY_SIZE ((uint)(8 * 1024) - CPM_DATAONLY_BASE)
#define CPM_FCC_SPECIAL_BASE ((uint)0x00009000)
#else
-
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