[U-Boot] [PATCH v2] driver/ddr/fsl: Add workaround for A009663

[Shengzhou Liu]

Erratum A-009663 workaround requires to set DDR_INTERVAL[BSTOPRE] to 0
before setting DDR_SDRAM_CFG[MEM_EN] and set DDR_INTERVAL[BSTOPRE]
to the desired value after DDR initialization has completed.

When DDR controller is configured to operate in auto-precharge
mode(DDR_INTERVAL[BSTOPRE]=0), this workaround is not needed.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu at freescale.com>
---
v2: add more comments.

 arch/arm/include/asm/arch-fsl-layerscape/config.h |  3 +++
 arch/arm/include/asm/arch-ls102xa/config.h        |  1 +
 arch/powerpc/cpu/mpc85xx/cmd_errata.c             |  3 +++
 arch/powerpc/include/asm/config_mpc85xx.h         |  2 ++
 drivers/ddr/fsl/fsl_ddr_gen4.c                    | 10 ++++++++++
 include/fsl_ddr_sdram.h                           |  1 +
 6 files changed, 20 insertions(+)

diff --git a/arch/arm/include/asm/arch-fsl-layerscape/config.h b/arch/arm/include/asm/arch-fsl-layerscape/config.h
index 6e5224e..fac82ff 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/config.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/config.h
@@ -118,6 +118,8 @@
 #define CONFIG_SYS_FSL_ERRATUM_A008585
 #define CONFIG_SYS_FSL_ERRATUM_A008751
 #define CONFIG_SYS_FSL_ERRATUM_A009635
+#define CONFIG_SYS_FSL_ERRATUM_A009663
+
 #elif defined(CONFIG_LS1043A)
 #define CONFIG_MAX_CPUS				4
 #define CONFIG_SYS_CACHELINE_SIZE		64
@@ -165,6 +167,7 @@
 /* Generic Interrupt Controller Definitions */
 #define GICD_BASE		0x01401000
 #define GICC_BASE		0x01402000
+#define CONFIG_SYS_FSL_ERRATUM_A009663
 
 #else
 #error SoC not defined
diff --git a/arch/arm/include/asm/arch-ls102xa/config.h b/arch/arm/include/asm/arch-ls102xa/config.h
index f066480..424fe87 100644
--- a/arch/arm/include/asm/arch-ls102xa/config.h
+++ b/arch/arm/include/asm/arch-ls102xa/config.h
@@ -131,6 +131,7 @@
 #define CONFIG_SYS_FSL_SEC_COMPAT		5
 #define CONFIG_USB_MAX_CONTROLLER_COUNT		1
 #define CONFIG_SYS_FSL_ERRATUM_A008378
+#define CONFIG_SYS_FSL_ERRATUM_A009663
 #else
 #error SoC not defined
 #endif
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index a493556..3b06ae4 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -326,6 +326,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #if defined(CONFIG_SYS_FSL_B4860QDS_XFI_ERR) && defined(CONFIG_B4860QDS)
 	puts("Work-around for Erratum XFI on B4860QDS enabled\n");
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_A009663
+	puts("Work-around for Erratum A009663 enabled\n");
+#endif
 
 	return 0;
 }
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index 674fac8..eccc146 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -808,6 +808,7 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022)
 #define QE_NUM_OF_SNUM			28
 #define CONFIG_SYS_FSL_SFP_VER_3_0
 #define CONFIG_SYS_FSL_ERRATUM_A008378
+#define CONFIG_SYS_FSL_ERRATUM_A009663
 
 #elif defined(CONFIG_PPC_T1024) || defined(CONFIG_PPC_T1023) ||\
 defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013)
@@ -856,6 +857,7 @@ defined(CONFIG_PPC_T1014) || defined(CONFIG_PPC_T1013)
 #define QE_NUM_OF_SNUM			28
 #define CONFIG_SYS_FSL_SFP_VER_3_0
 #define CONFIG_SYS_FSL_ERRATUM_A008378
+#define CONFIG_SYS_FSL_ERRATUM_A009663
 
 #elif defined(CONFIG_PPC_T2080) || defined(CONFIG_PPC_T2081)
 #define CONFIG_E6500
diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c
index 3fca5c2..6bd447d 100644
--- a/drivers/ddr/fsl/fsl_ddr_gen4.c
+++ b/drivers/ddr/fsl/fsl_ddr_gen4.c
@@ -151,7 +151,12 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
 	ddr_out32(&ddr->sdram_mode_15, regs->ddr_sdram_mode_15);
 	ddr_out32(&ddr->sdram_mode_16, regs->ddr_sdram_mode_16);
 	ddr_out32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl);
+#ifdef CONFIG_SYS_FSL_ERRATUM_A009663
+	ddr_out32(&ddr->sdram_interval,
+		  regs->ddr_sdram_interval & ~SDRAM_INTERVAL_BSTOPRE);
+#else
 	ddr_out32(&ddr->sdram_interval, regs->ddr_sdram_interval);
+#endif
 	ddr_out32(&ddr->sdram_data_init, regs->ddr_data_init);
 	ddr_out32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
 #ifndef CONFIG_SYS_FSL_DDR_EMU
@@ -379,6 +384,11 @@ step2:
 
 	if (timeout <= 0)
 		printf("Waiting for D_INIT timeout. Memory may not work.\n");
+
+#ifdef CONFIG_SYS_FSL_ERRATUM_A009663
+	ddr_out32(&ddr->sdram_interval, regs->ddr_sdram_interval);
+#endif
+
 #ifdef CONFIG_DEEP_SLEEP
 	if (is_warm_boot()) {
 		/* exit self-refresh */
diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h
index 4b022d4..504903d 100644
--- a/include/fsl_ddr_sdram.h
+++ b/include/fsl_ddr_sdram.h
@@ -131,6 +131,7 @@ typedef struct ddr4_spd_eeprom_s generic_spd_eeprom_t;
 #define SDRAM_CFG2_ODT_ONLY_READ	2
 #define SDRAM_CFG2_ODT_ALWAYS		3
 
+#define SDRAM_INTERVAL_BSTOPRE	0x3FFF
 #define TIMING_CFG_2_CPO_MASK	0x0F800000
 
 #if defined(CONFIG_SYS_FSL_DDR_VER) && \
-- 
2.1.0.27.g96db324