diff options
| author | York Sun <yorksun@freescale.com> | 2014-01-08 13:00:42 -0800 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2014-01-21 13:40:52 -0800 |
| commit | 76356eb57cdf607d4e77dd57cd0449d7f5b7bdab (patch) | |
| tree | 8d2ce217904f1c62f5621eca34d898dfffe57c7e | |
| parent | b518816423014587ce89be242503e439c7ade956 (diff) | |
powerpc/mpc85xx: Revise workaround for DDR-A003
Existing workaround only handles one RDIMM on reference design. In case
of two RDIMMs being used, the workaround requires two separate writes to
DDR_SDRAM_MD_CNTL register.
This patch also restores two debug registers changed by the workaround.
Signed-off-by: York Sun <yorksun@freescale.com>
CC: Ben Collins <ben.c@servergy.com>
CC: James Yang <James.Yang@freescale.com>
| -rw-r--r-- | drivers/ddr/fsl/mpc85xx_ddr_gen3.c | 69 |
1 files changed, 67 insertions, 2 deletions
diff --git a/drivers/ddr/fsl/mpc85xx_ddr_gen3.c b/drivers/ddr/fsl/mpc85xx_ddr_gen3.c index 9f041330940..c8050864163 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 +219,18 @@ 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; + while (in_be32(&ddr->sdram_md_cntl) & MD_CNTL_MD_EN) + ; + 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 +239,18 @@ 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; + while (in_be32(&ddr->sdram_md_cntl) & MD_CNTL_MD_EN) + ; + 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 +259,18 @@ 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; + while (in_be32(&ddr->sdram_md_cntl) & MD_CNTL_MD_EN) + ; + 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 +279,18 @@ 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; + while (in_be32(&ddr->sdram_md_cntl) & MD_CNTL_MD_EN) + ; + 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 +299,18 @@ 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; + while (in_be32(&ddr->sdram_md_cntl) & MD_CNTL_MD_EN) + ; + 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 +324,8 @@ 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); } |