From 074596c0b5f4e9a3642a3159a9fc7f8b8064c18a Mon Sep 17 00:00:00 2001 From: Shengzhou Liu Date: Thu, 7 Apr 2016 16:22:21 +0800 Subject: 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 Reviewed-by: York Sun --- include/fsl_ddr_sdram.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/fsl_ddr_sdram.h') diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h index cf316a4665..44ae7fbb9c 100644 --- a/include/fsl_ddr_sdram.h +++ b/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 -- cgit v1.2.3 From 4a68489e12313a7fa8740463dee0eea2985eb563 Mon Sep 17 00:00:00 2001 From: Shengzhou Liu Date: Wed, 16 Mar 2016 13:50:22 +0800 Subject: drivers/ddr/fsl: update workaround for erratum A-008511 Per the latest erratum document, update step 4 and step 8, only DEBUG_29[21] is changed, all other bits should not be changed. Signed-off-by: Shengzhou Liu Reviewed-by: York Sun --- drivers/ddr/fsl/fsl_ddr_gen4.c | 10 +++++++--- include/fsl_ddr_sdram.h | 3 +++ 2 files changed, 10 insertions(+), 3 deletions(-) (limited to 'include/fsl_ddr_sdram.h') diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c index 608810d4e2..7cdb7008b4 100644 --- a/drivers/ddr/fsl/fsl_ddr_gen4.c +++ b/drivers/ddr/fsl/fsl_ddr_gen4.c @@ -240,8 +240,10 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, /* Disable DRAM VRef training */ ddr_out32(&ddr->ddr_cdr2, regs->ddr_cdr2 & ~DDR_CDR2_VREF_TRAIN_EN); - /* Disable deskew */ - ddr_out32(&ddr->debug[28], 0x400); + /* disable transmit bit deskew */ + temp32 = ddr_in32(&ddr->debug[28]); + temp32 |= DDR_TX_BD_DIS; + ddr_out32(&ddr->debug[28], temp32); /* Disable D_INIT */ ddr_out32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2 & ~SDRAM_CFG2_D_INIT); @@ -358,7 +360,9 @@ step2: debug("MR6 = 0x%08x\n", temp32); } ddr_out32(&ddr->sdram_md_cntl, 0); - ddr_out32(&ddr->debug[28], 0); /* Enable deskew */ + temp32 = ddr_in32(&ddr->debug[28]); + temp32 &= ~DDR_TX_BD_DIS; /* Enable deskew */ + ddr_out32(&ddr->debug[28], temp32); ddr_out32(&ddr->debug[1], 0x400); /* restart deskew */ /* wait for idle */ timeout = 40; diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h index 44ae7fbb9c..acddf14a3f 100644 --- a/include/fsl_ddr_sdram.h +++ b/include/fsl_ddr_sdram.h @@ -189,6 +189,9 @@ typedef struct ddr4_spd_eeprom_s generic_spd_eeprom_t; #define DDR_MR5_CA_PARITY_LAT_4_CLK 0x1 /* for DDR4-1600/1866/2133 */ #define DDR_MR5_CA_PARITY_LAT_5_CLK 0x2 /* for DDR4-2400 */ +/* DEBUG_29 register */ +#define DDR_TX_BD_DIS (1 << 10) /* Transmit Bit Deskew Disable */ + #if (defined(CONFIG_SYS_FSL_DDR_VER) && \ (CONFIG_SYS_FSL_DDR_VER >= FSL_DDR_VER_4_7)) -- cgit v1.2.3 From 5fc62fe57097e195a8047859cd3c278a5d6790b6 Mon Sep 17 00:00:00 2001 From: Shengzhou Liu Date: Wed, 16 Mar 2016 13:50:23 +0800 Subject: driver/ddr/fsl: Add workaround for erratum A-009801 The initial training for the DDRC may provide results that are not optimized. The workaround provides better read timing margins. Signed-off-by: Shengzhou Liu Reviewed-by: York Sun --- arch/arm/include/asm/arch-fsl-layerscape/config.h | 1 + drivers/ddr/fsl/fsl_ddr_gen4.c | 7 +++++++ include/fsl_ddr_sdram.h | 4 ++++ 3 files changed, 12 insertions(+) (limited to 'include/fsl_ddr_sdram.h') diff --git a/arch/arm/include/asm/arch-fsl-layerscape/config.h b/arch/arm/include/asm/arch-fsl-layerscape/config.h index a24dc2805d..6529281c94 100644 --- a/arch/arm/include/asm/arch-fsl-layerscape/config.h +++ b/arch/arm/include/asm/arch-fsl-layerscape/config.h @@ -134,6 +134,7 @@ #define CONFIG_SYS_FSL_ERRATUM_A008751 #define CONFIG_SYS_FSL_ERRATUM_A009635 #define CONFIG_SYS_FSL_ERRATUM_A009663 +#define CONFIG_SYS_FSL_ERRATUM_A009801 #define CONFIG_SYS_FSL_ERRATUM_A009803 #define CONFIG_SYS_FSL_ERRATUM_A009942 diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c index 7cdb7008b4..1dc0631440 100644 --- a/drivers/ddr/fsl/fsl_ddr_gen4.c +++ b/drivers/ddr/fsl/fsl_ddr_gen4.c @@ -251,6 +251,13 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, } #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A009801 + temp32 = ddr_in32(&ddr->debug[25]); + temp32 &= ~DDR_CAS_TO_PRE_SUB_MASK; + temp32 |= 9 << DDR_CAS_TO_PRE_SUB_SHIFT; + ddr_out32(&ddr->debug[25], temp32); +#endif + #ifdef CONFIG_SYS_FSL_ERRATUM_A009942 ddr_freq = get_ddr_freq(ctrl_num) / 1000000; tmp = ddr_in32(&ddr->debug[28]); diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h index acddf14a3f..486e47e508 100644 --- a/include/fsl_ddr_sdram.h +++ b/include/fsl_ddr_sdram.h @@ -189,6 +189,10 @@ typedef struct ddr4_spd_eeprom_s generic_spd_eeprom_t; #define DDR_MR5_CA_PARITY_LAT_4_CLK 0x1 /* for DDR4-1600/1866/2133 */ #define DDR_MR5_CA_PARITY_LAT_5_CLK 0x2 /* for DDR4-2400 */ +/* DEBUG_26 register */ +#define DDR_CAS_TO_PRE_SUB_MASK 0x0000f000 /* CAS to preamble subtract value */ +#define DDR_CAS_TO_PRE_SUB_SHIFT 12 + /* DEBUG_29 register */ #define DDR_TX_BD_DIS (1 << 10) /* Transmit Bit Deskew Disable */ -- cgit v1.2.3