Existing workaround only handles one RDIMM on reference design. In case
two RDIMMs are used, the workaround requires two separate writes to
DDR_SDRAM_MD_CNTL register.
This patch also restores two registers changed by the workaround.
Signed-off-by: York Sun <york...@freescale.com>
---
drivers/ddr/fsl/mpc85xx_ddr_gen3.c | 59 ++++++++++++++++++++++++++++++++++--
1 file changed, 57 insertions(+), 2 deletions(-)
diff --git a/drivers/ddr/fsl/mpc85xx_ddr_gen3.c
b/drivers/ddr/fsl/mpc85xx_ddr_gen3.c
index 9f04133..864976f 100644
--- a/drivers/ddr/fsl/mpc85xx_ddr_gen3.c
+++ b/drivers/ddr/fsl/mpc85xx_ddr_gen3.c
@@ -39,6 +39,9 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
unsigned int csn_bnds_backup = 0, cs_sa, cs_ea, *csn_bnds_t;
int csn = -1;
#endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_DDR_A003
+ u32 save1, save2;
+#endif
switch (ctrl_num) {
case 0:
@@ -197,6 +200,8 @@ step2:
out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl &
0x7fffffff);
out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2 & 0xffffffeb);
out_be32(&ddr->mtcr, 0);
+ save1 = in_be32(&ddr->debug[12]);
+ save2 = in_be32(&ddr->debug[21]);
out_be32(&ddr->debug[12], 0x00000015);
out_be32(&ddr->debug[21], 0x24000000);
out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval &
0xffff);
@@ -214,6 +219,16 @@ step2:
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x02));
+#if (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+ if (!(regs->cs[2].config & SDRAM_CS_CONFIG_EN))
+ break;
+ out_be32(&ddr->sdram_md_cntl,
+ MD_CNTL_MD_EN |
+ MD_CNTL_CS_SEL_CS2_CS3 |
+ 0x04000000 |
+ MD_CNTL_WRCW |
+ MD_CNTL_MD_VALUE(0x02));
+#endif
break;
case 0x00100000:
out_be32(&ddr->sdram_md_cntl,
@@ -222,6 +237,16 @@ step2:
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x0a));
+#if (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+ if (!(regs->cs[2].config & SDRAM_CS_CONFIG_EN))
+ break;
+ out_be32(&ddr->sdram_md_cntl,
+ MD_CNTL_MD_EN |
+ MD_CNTL_CS_SEL_CS2_CS3 |
+ 0x04000000 |
+ MD_CNTL_WRCW |
+ MD_CNTL_MD_VALUE(0x0a));
+#endif
break;
case 0x00200000:
out_be32(&ddr->sdram_md_cntl,
@@ -230,6 +255,16 @@ step2:
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x12));
+#if (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+ if (!(regs->cs[2].config & SDRAM_CS_CONFIG_EN))
+ break;
+ out_be32(&ddr->sdram_md_cntl,
+ MD_CNTL_MD_EN |
+ MD_CNTL_CS_SEL_CS2_CS3 |
+ 0x04000000 |
+ MD_CNTL_WRCW |
+ MD_CNTL_MD_VALUE(0x12));
+#endif
break;
case 0x00300000:
out_be32(&ddr->sdram_md_cntl,
@@ -238,6 +273,16 @@ step2:
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x1a));
+#if (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+ if (!(regs->cs[2].config & SDRAM_CS_CONFIG_EN))
+ break;
+ out_be32(&ddr->sdram_md_cntl,
+ MD_CNTL_MD_EN |
+ MD_CNTL_CS_SEL_CS2_CS3 |
+ 0x04000000 |
+ MD_CNTL_WRCW |
+ MD_CNTL_MD_VALUE(0x1a));
+#endif
break;
default:
out_be32(&ddr->sdram_md_cntl,
@@ -246,6 +291,16 @@ step2:
0x04000000 |
MD_CNTL_WRCW |
MD_CNTL_MD_VALUE(0x02));
+#if (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
+ if (!(regs->cs[2].config & SDRAM_CS_CONFIG_EN))
+ break;
+ out_be32(&ddr->sdram_md_cntl,
+ MD_CNTL_MD_EN |
+ MD_CNTL_CS_SEL_CS2_CS3 |
+ 0x04000000 |
+ MD_CNTL_WRCW |
+ MD_CNTL_MD_VALUE(0x02));
+#endif
printf("Unsupported RC10\n");
break;
}
@@ -259,8 +314,8 @@ step2:
out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
- out_be32(&ddr->debug[12], 0x0);
- out_be32(&ddr->debug[21], 0x0);
+ out_be32(&ddr->debug[12], save1);
+ out_be32(&ddr->debug[21], save2);
out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
}
--
1.7.9.5
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