From 4baa38c51a3187990a31519f8163519eda3890b5 Mon Sep 17 00:00:00 2001 From: York Sun Date: Mon, 29 Aug 2016 17:04:13 +0800 Subject: driver/ddr/fsl: Revise workaround A008511 for A009803 DDR controller 5.2.1 has this erratum A008511 partially fixed. The workaround needs to be adjusted to take advantage of Vref training. This patch enables the training and force output enable to be off. Erratum A009803 requires the controller to be idel before enabling address parity. It was combined with workaround for A008511. With new A008511 flow, this flow needs to be changed to enabling data init (D_INIT) after the address parity is enabled. Signed-off-by: York Sun Signed-off-by: Shengzhou Liu --- drivers/ddr/fsl/fsl_ddr_gen4.c | 83 ++++++++++++++++++++++++------------------ 1 file changed, 47 insertions(+), 36 deletions(-) diff --git a/drivers/ddr/fsl/fsl_ddr_gen4.c b/drivers/ddr/fsl/fsl_ddr_gen4.c index c2f8a8bcae..aaf7c02688 100644 --- a/drivers/ddr/fsl/fsl_ddr_gen4.c +++ b/drivers/ddr/fsl/fsl_ddr_gen4.c @@ -238,7 +238,6 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, #ifdef CONFIG_SYS_FSL_ERRATUM_A008511 /* Part 1 of 2 */ - /* This erraum only applies to verion 5.2.0 */ if (fsl_ddr_get_version(ctrl_num) == 0x50200) { /* Disable DRAM VRef training */ ddr_out32(&ddr->ddr_cdr2, @@ -247,13 +246,25 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, 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); ddr_out32(&ddr->debug[25], 0x9000); + } else if (fsl_ddr_get_version(ctrl_num) == 0x50201) { + /* Output enable forced off */ + ddr_out32(&ddr->debug[37], 1 << 31); + /* Enable Vref training */ + ddr_out32(&ddr->ddr_cdr2, + regs->ddr_cdr2 | DDR_CDR2_VREF_TRAIN_EN); + } else { + debug("Erratum A008511 doesn't apply.\n"); } #endif +#if defined(CONFIG_SYS_FSL_ERRATUM_A009803) || \ + defined(CONFIG_SYS_FSL_ERRATUM_A008511) + /* Disable D_INIT */ + ddr_out32(&ddr->sdram_cfg_2, + regs->ddr_sdram_cfg_2 & ~SDRAM_CFG2_D_INIT); +#endif + #ifdef CONFIG_SYS_FSL_ERRATUM_A009801 temp32 = ddr_in32(&ddr->debug[25]); temp32 &= ~DDR_CAS_TO_PRE_SUB_MASK; @@ -331,21 +342,21 @@ step2: #if defined(CONFIG_SYS_FSL_ERRATUM_A008511) || \ defined(CONFIG_SYS_FSL_ERRATUM_A009803) /* Part 2 of 2 */ - /* This erraum only applies to verion 5.2.0 */ - if (fsl_ddr_get_version(ctrl_num) == 0x50200) { - /* Wait for idle */ - timeout = 40; - while (!(ddr_in32(&ddr->debug[1]) & 0x2) && - (timeout > 0)) { - udelay(1000); - timeout--; - } - if (timeout <= 0) { - printf("Controler %d timeout, debug_2 = %x\n", - ctrl_num, ddr_in32(&ddr->debug[1])); - } + timeout = 40; + /* Wait for idle. D_INIT needs to be cleared earlier, or timeout */ + while (!(ddr_in32(&ddr->debug[1]) & 0x2) && + (timeout > 0)) { + udelay(1000); + timeout--; + } + if (timeout <= 0) { + printf("Controler %d timeout, debug_2 = %x\n", + ctrl_num, ddr_in32(&ddr->debug[1])); + } #ifdef CONFIG_SYS_FSL_ERRATUM_A008511 + /* This erraum only applies to verion 5.2.0 */ + if (fsl_ddr_get_version(ctrl_num) == 0x50200) { /* The vref setting sequence is different for range 2 */ if (regs->ddr_cdr2 & DDR_CDR2_VREF_RANGE_2) vref_seq = vref_seq2; @@ -392,32 +403,32 @@ step2: printf("Controler %d timeout, debug_2 = %x\n", ctrl_num, ddr_in32(&ddr->debug[1])); } - /* Restore D_INIT */ - ddr_out32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2); + } #endif /* CONFIG_SYS_FSL_ERRATUM_A008511 */ #ifdef CONFIG_SYS_FSL_ERRATUM_A009803 - if (regs->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) { - /* if it's RDIMM */ - if (regs->ddr_sdram_cfg & SDRAM_CFG_RD_EN) { - for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { - if (!(regs->cs[i].config & SDRAM_CS_CONFIG_EN)) - continue; - set_wait_for_bits_clear(&ddr->sdram_md_cntl, - MD_CNTL_MD_EN | - MD_CNTL_CS_SEL(i) | - 0x070000ed, - MD_CNTL_MD_EN); - udelay(1); - } + if (regs->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) { + /* if it's RDIMM */ + if (regs->ddr_sdram_cfg & SDRAM_CFG_RD_EN) { + for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { + if (!(regs->cs[i].config & SDRAM_CS_CONFIG_EN)) + continue; + set_wait_for_bits_clear(&ddr->sdram_md_cntl, + MD_CNTL_MD_EN | + MD_CNTL_CS_SEL(i) | + 0x070000ed, + MD_CNTL_MD_EN); + udelay(1); } - - ddr_out32(&ddr->err_disable, - regs->err_disable & ~DDR_ERR_DISABLE_APED); } -#endif + + ddr_out32(&ddr->err_disable, + regs->err_disable & ~DDR_ERR_DISABLE_APED); } #endif + /* Restore D_INIT */ + ddr_out32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2); +#endif total_gb_size_per_controller = 0; for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { -- cgit