armv8/ls1043: Add workaround for DDR erratum A-008850

Barrier transactions from CCI400 need to be disabled till
the DDR is configured, otherwise it may lead to system hang.
The patch adds workaround to fix the erratum.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/cpu/armv8/fsl-layerscape/soc.c

@@ -12,6 +12,8 @@
 #include <asm/io.h>
 #include <asm/global_data.h>
 #include <asm/arch-fsl-layerscape/config.h>
+#include <fsl_ddr_sdram.h>
+#include <fsl_ddr.h>
 #ifdef CONFIG_CHAIN_OF_TRUST
 #include <fsl_validate.h>
 #endif
@@ -271,6 +273,39 @@ static void erratum_a009660(void)
 #endif
 }
 
+static void erratum_a008850_early(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008850
+	/* part 1 of 2 */
+	struct ccsr_cci400 __iomem *cci = (void *)CONFIG_SYS_CCI400_ADDR;
+	struct ccsr_ddr __iomem *ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR;
+
+	/* disables propagation of barrier transactions to DDRC from CCI400 */
+	out_le32(&cci->ctrl_ord, CCI400_CTRLORD_TERM_BARRIER);
+
+	/* disable the re-ordering in DDRC */
+	ddr_out32(&ddr->eor, DDR_EOR_RD_REOD_DIS | DDR_EOR_WD_REOD_DIS);
+#endif
+}
+
+void erratum_a008850_post(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008850
+	/* part 2 of 2 */
+	struct ccsr_cci400 __iomem *cci = (void *)CONFIG_SYS_CCI400_ADDR;
+	struct ccsr_ddr __iomem *ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR;
+	u32 tmp;
+
+	/* enable propagation of barrier transactions to DDRC from CCI400 */
+	out_le32(&cci->ctrl_ord, CCI400_CTRLORD_EN_BARRIER);
+
+	/* enable the re-ordering in DDRC */
+	tmp = ddr_in32(&ddr->eor);
+	tmp &= ~(DDR_EOR_RD_REOD_DIS | DDR_EOR_WD_REOD_DIS);
+	ddr_out32(&ddr->eor, tmp);
+#endif
+}
+
 void fsl_lsch2_early_init_f(void)
 {
 	struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR;
@@ -295,6 +330,7 @@ void fsl_lsch2_early_init_f(void)
 		 CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN);
 
 	/* Erratum */
+	erratum_a008850_early(); /* part 1 of 2 */
 	erratum_a009929();
 	erratum_a009660();
 }

arch/arm/include/asm/arch-fsl-layerscape/config.h

@@ -191,6 +191,7 @@
 #define GICD_BASE		0x01401000
 #define GICC_BASE		0x01402000
 
+#define CONFIG_SYS_FSL_ERRATUM_A008850
 #define CONFIG_SYS_FSL_ERRATUM_A009663
 #define CONFIG_SYS_FSL_ERRATUM_A009929
 #define CONFIG_SYS_FSL_ERRATUM_A009942

board/freescale/ls1043aqds/ddr.c

@@ -116,6 +116,7 @@ phys_size_t initdram(int board_type)
 
 	dram_size = fsl_ddr_sdram();
 #endif
+	erratum_a008850_post();
 
 #ifdef CONFIG_FSL_DEEP_SLEEP
 	fsl_dp_ddr_restore();

board/freescale/ls1043aqds/ddr.h

@@ -7,6 +7,8 @@
 #ifndef __DDR_H__
 #define __DDR_H__
 
+extern void erratum_a008850_post(void);
+
 struct board_specific_parameters {
 	u32 n_ranks;
 	u32 datarate_mhz_high;

board/freescale/ls1043aqds/ls1043aqds.c

@@ -307,14 +307,6 @@ int misc_init_r(void)
 
 int board_init(void)
 {
-	struct ccsr_cci400 *cci = (struct ccsr_cci400 *)
-				   CONFIG_SYS_CCI400_ADDR;
-
-	/* Set CCI-400 control override register to enable barrier
-	 * transaction */
-	out_le32(&cci->ctrl_ord,
-		 CCI400_CTRLORD_EN_BARRIER);
-
 	select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
 	board_retimer_init();
 

board/freescale/ls1043ardb/ddr.c

@@ -177,6 +177,8 @@ phys_size_t initdram(int board_type)
 #else
 	dram_size =  fsl_ddr_sdram_size();
 #endif
+	erratum_a008850_post();
+
 #ifdef CONFIG_FSL_DEEP_SLEEP
 	fsl_dp_ddr_restore();
 #endif

board/freescale/ls1043ardb/ddr.h

@@ -6,6 +6,9 @@
 
 #ifndef __DDR_H__
 #define __DDR_H__
+
+extern void erratum_a008850_post(void);
+
 struct board_specific_parameters {
 	u32 n_ranks;
 	u32 datarate_mhz_high;

board/freescale/ls1043ardb/ls1043ardb.c

@@ -83,14 +83,6 @@ int board_early_init_f(void)
 
 int board_init(void)
 {
-	struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR;
-
-	/*
-	 * Set CCI-400 control override register to enable barrier
-	 * transaction
-	 */
-	out_le32(&cci->ctrl_ord, CCI400_CTRLORD_EN_BARRIER);
-
 #ifdef CONFIG_FSL_IFC
 	init_final_memctl_regs();
 #endif

include/fsl_ddr_sdram.h

@@ -146,6 +146,10 @@ typedef struct ddr4_spd_eeprom_s generic_spd_eeprom_t;
 #define WR_DATA_DELAY_SHIFT	10
 #endif
 
+/* DDR_EOR register */
+#define DDR_EOR_RD_REOD_DIS	0x07000000
+#define DDR_EOR_WD_REOD_DIS	0x00100000
+
 /* DDR_MD_CNTL */
 #define MD_CNTL_MD_EN		0x80000000
 #define MD_CNTL_CS_SEL_CS0	0x00000000