arm/ls1021a: Add workaround for DDR erratum A008378

Internal memory controller counters can reach a bad state after
training in DDR4 mode if accumulated ECC or DBI mode is eanbled.

Signed-off-by: York Sun <yorksun@freescale.com>

diff --git a/arch/arm/include/asm/arch-ls102xa/config.h b/arch/arm/include/asm/arch-ls102xa/config.h
index 5e934da..a06ef9d 100644 (file)
--- a/arch/arm/include/asm/arch-ls102xa/config.h
+++ b/arch/arm/include/asm/arch-ls102xa/config.h
@@ -97,6 +97,7 @@
 #define CONFIG_SYS_FSL_DDR_VER                 FSL_DDR_VER_5_0
 #define CONFIG_SYS_FSL_SEC_COMPAT              5
 #define CONFIG_USB_MAX_CONTROLLER_COUNT                1
+#define CONFIG_SYS_FSL_ERRATUM_A008378
 #else
 #error SoC not defined
 #endif

diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c
index a3c01e7..4eef047 100644 (file)
--- a/drivers/ddr/fsl/fsl_ddr_gen4.c
+++ b/drivers/ddr/fsl/fsl_ddr_gen4.c
@@ -171,6 +171,14 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
                        ddr_out32(&ddr->debug[i], regs->debug[i]);
                }
        }
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008378
+       /* Erratum applies when accumulated ECC is used, or DBI is enabled */
+#define IS_ACC_ECC_EN(v) ((v) & 0x4)
+#define IS_DBI(v) ((((v) >> 12) & 0x3) == 0x2)
+       if (IS_ACC_ECC_EN(regs->ddr_sdram_cfg) ||
+           IS_DBI(regs->ddr_sdram_cfg_3))
+               ddr_setbits32(ddr->debug[28], 0x9 << 20);
+#endif
 
        /*
         * For RDIMMs, JEDEC spec requires clocks to be stable before reset is

diff --git a/include/fsl_ddr.h b/include/fsl_ddr.h
index 675557a..3286c95 100644 (file)
--- a/include/fsl_ddr.h
+++ b/include/fsl_ddr.h
@@ -23,9 +23,15 @@
 #ifdef CONFIG_SYS_FSL_DDR_LE
 #define ddr_in32(a)    in_le32(a)
 #define ddr_out32(a, v)        out_le32(a, v)
+#define ddr_setbits32(a, v)    setbits_le32(a, v)
+#define ddr_clrbits32(a, v)    clrbits_le32(a, v)
+#define ddr_clrsetbits32(a, clear, set)        clrsetbits_le32(a, clear, set)
 #else
 #define ddr_in32(a)    in_be32(a)
 #define ddr_out32(a, v)        out_be32(a, v)
+#define ddr_setbits32(a, v)    setbits_be32(a, v)
+#define ddr_clrbits32(a, v)    clrbits_be32(a, v)
+#define ddr_clrsetbits32(a, clear, set)        clrsetbits_be32(a, clear, set)
 #endif
 
 #define _DDR_ADDR CONFIG_SYS_FSL_DDR_ADDR