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drivers/ddr/fsl: update workaround for erratum A-008511

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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 <Shengzhou.Liu@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Shengzhou Liu 2016-03-16 13:50:22 +08:00 committed by York Sun
parent 074596c0b5
commit 4a68489e12
2 changed files with 10 additions and 3 deletions
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10
drivers/ddr/fsl/fsl_ddr_gen4.c
View file

@ -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;

3
include/fsl_ddr_sdram.h
View file

@ -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))