fsl_esdhc: Add the workaround for erratum ESDHC136 (enable on P4080)

False multi-bit ECC errors will be reported by the eSDHC buffer which
can trigger a reset request.

We disable all ECC error checking on SDHC.

Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index d5c34c8..4e2cb4a 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -56,6 +56,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #if defined(CONFIG_SYS_FSL_ERRATUM_ESDHC135)
        puts("Work-around for Erratum ESDHC135 enabled\n");
 #endif
+#if defined(CONFIG_SYS_FSL_ERRATUM_ESDHC136)
+       puts("Work-around for Erratum ESDHC136 enabled\n");
+#endif
        return 0;
 }
 

diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index 1d016c4..354b222 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -394,6 +394,14 @@ int cpu_init_r(void)
        setup_mp();
 #endif
 
+#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC136
+       {
+               void *p;
+               p = (void *)CONFIG_SYS_DCSRBAR + 0x20520;
+               setbits_be32(p, 1 << (31 - 14));
+       }
+#endif
+
 #ifdef CONFIG_SYS_LBC_LCRR
        /*
         * Modify the CLKDIV field of LCRR register to improve the writing

diff --git a/include/configs/P4080DS.h b/include/configs/P4080DS.h
index a15dd76..4dd7faa 100644 (file)
--- a/include/configs/P4080DS.h
+++ b/include/configs/P4080DS.h
@@ -37,6 +37,7 @@
 
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC111
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC135
+#define CONFIG_SYS_FSL_ERRATUM_ESDHC136
 
 #define CONFIG_SYS_P4080_ERRATUM_CPU22
 #define CONFIG_SYS_P4080_ERRATUM_SERDES8