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authorKumar Gala <galak@kernel.crashing.org>2011-01-13 02:58:23 -0600
committerKumar Gala <galak@kernel.crashing.org>2011-01-14 01:32:22 -0600
commitf133796da8ec87ccbafc9c492636def619d99401 (patch)
treedfe191877ff5f37f22a28496b911f6fd8863c3ef /arch
parent868da5936e40b8685c813c1eb31eed629eaae295 (diff)
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powerpc/85xx: Add the workaround for erratum ELBC-A001 (enable on P4080)
Simultaneous FCM and GPCM or UPM operation may erroneously trigger bus monitor timeout. Set timeout to maximum to avoid. Based on a patch from Lan Chunhe <b25806@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/cpu/mpc85xx/cmd_errata.c3
-rw-r--r--arch/powerpc/cpu/mpc8xxx/fsl_lbc.c7
-rw-r--r--arch/powerpc/include/asm/fsl_lbc.h4
3 files changed, 12 insertions, 2 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index bf70d2d..7dfa596 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -65,6 +65,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003
puts("Work-around for Erratum CPC-A003 enabled\n");
#endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_ELBC_A001
+ puts("Work-around for Erratum ELBC-A001 enabled\n");
+#endif
return 0;
}
diff --git a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
index 6f401e7..7598ebf 100644
--- a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
+++ b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2010 Freescale Semiconductor, Inc.
+ * Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -34,6 +34,11 @@ void init_early_memctl_regs(void)
{
uint init_br1 = 1;
+#ifdef CONFIG_SYS_FSL_ERRATUM_ELBC_A001
+ /* Set the local bus monitor timeout value to the maximum */
+ clrsetbits_be32(&(LBC_BASE_ADDR)->lbcr, LBCR_BMT|LBCR_BMTPS, 0xf);
+#endif
+
#ifdef CONFIG_MPC85xx
/* if cs1 is already set via debugger, leave cs0/cs1 alone */
if (get_lbc_br(1) & BR_V)
diff --git a/arch/powerpc/include/asm/fsl_lbc.h b/arch/powerpc/include/asm/fsl_lbc.h
index c504732..8695a62 100644
--- a/arch/powerpc/include/asm/fsl_lbc.h
+++ b/arch/powerpc/include/asm/fsl_lbc.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2004-2008,2010 Freescale Semiconductor, Inc.
+ * Copyright (C) 2004-2008,2010-2011 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
@@ -295,6 +295,8 @@ void lbc_sdram_init(void);
#define LBCR_EPAR_SHIFT 16
#define LBCR_BMT 0x0000FF00
#define LBCR_BMT_SHIFT 8
+#define LBCR_BMTPS 0x0000000F
+#define LBCR_BMTPS_SHIFT 0
/* LCRR - Clock Ratio Register
*/