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 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'drivers/ddr/fsl/fsl_ddr_gen4.c') 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; -- cgit v1.2.1 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 --- drivers/ddr/fsl/fsl_ddr_gen4.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/ddr/fsl/fsl_ddr_gen4.c') 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]); -- cgit v1.2.1 From 019a147b658631921a5d9d429a9097b33e142d78 Mon Sep 17 00:00:00 2001 From: Shengzhou Liu Date: Tue, 10 May 2016 16:03:47 +0800 Subject: driver/ddr/fsl: Add workaround for erratum A-010165 During DDR-2133 operation, the transmit data eye margins determined during the memory controller initialization may be sub-optimal, set DEBUG_29[12] and DEBUG_29[13:16] = 4'b0100 before MEM_EN is set. Signed-off-by: Shengzhou Liu Reviewed-by: York Sun --- drivers/ddr/fsl/fsl_ddr_gen4.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers/ddr/fsl/fsl_ddr_gen4.c') diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c index 1dc0631440..5039f5de0a 100644 --- a/drivers/ddr/fsl/fsl_ddr_gen4.c +++ b/drivers/ddr/fsl/fsl_ddr_gen4.c @@ -56,7 +56,8 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, u32 vref_seq2[3] = {0xc0, 0xf0, 0x70}; /* for range 2 */ u32 *vref_seq = vref_seq1; #endif -#ifdef CONFIG_SYS_FSL_ERRATUM_A009942 +#if defined(CONFIG_SYS_FSL_ERRATUM_A009942) | \ + defined(CONFIG_SYS_FSL_ERRATUM_A010165) ulong ddr_freq; u32 tmp; #endif @@ -271,6 +272,13 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, ddr_out32(&ddr->debug[28], tmp | 0x0060007b); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A010165 + ddr_freq = get_ddr_freq(ctrl_num) / 1000000; + if ((ddr_freq > 1900) && (ddr_freq < 2300)) { + tmp = ddr_in32(&ddr->debug[28]); + ddr_out32(&ddr->debug[28], tmp | 0x000a0000); + } +#endif /* * For RDIMMs, JEDEC spec requires clocks to be stable before reset is * deasserted. Clocks start when any chip select is enabled and clock -- cgit v1.2.1