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>

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;
 }

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)

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
  */

include/configs/P4080DS.h

@@ -43,5 +43,6 @@
 #define CONFIG_SYS_FSL_ERRATUM_CPC_A002
 #define CONFIG_SYS_FSL_ERRATUM_CPC_A003
 #define CONFIG_SYS_P4080_ERRATUM_SERDES8
+#define CONFIG_SYS_FSL_ERRATUM_ELBC_A001
 
 #include "corenet_ds.h"