diff options
| author | York Sun <yorksun@freescale.com> | 2011-08-26 11:32:40 -0700 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-09-29 19:01:06 -0500 |
| commit | cae7c1b56b4f59289a1b2f10532c2c6a0b12c6c1 (patch) | |
| tree | 9cf014b86bf2a604c48a8307d64a6ccc34b83516 | |
| parent | f8bc7bb5a79b392db3af9f62b63caefab8afbc31 (diff) | |
powerpc/mpc8xxx: Fix DDR code for empty first DIMM slot and enable DQS_en
Check second DIMM slot in case the first one is empty.
Honor DQS enable option for SDRAM mode register.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c | 19 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/fsl_ddr_sdram.h | 4 |
2 files changed, 14 insertions, 9 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c index 6aee14a609..dd4fceaf88 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c @@ -160,7 +160,7 @@ static void set_csn_config(int dimm_number, int i, fsl_ddr_cfg_regs_t *ddr, break; case 2: if ((dimm_number == 0 && dimm_params[0].n_ranks > 2) || \ - (dimm_number > 1 && dimm_params[dimm_number].n_ranks > 0)) + (dimm_number >= 1 && dimm_params[dimm_number].n_ranks > 0)) go_config = 1; break; case 3: @@ -631,7 +631,7 @@ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr, unsigned int sr_ie = 0; /* Self-refresh interrupt enable */ unsigned int dll_rst_dis; /* DLL reset disable */ unsigned int dqs_cfg; /* DQS configuration */ - unsigned int odt_cfg; /* ODT configuration */ + unsigned int odt_cfg = 0; /* ODT configuration */ unsigned int num_pr; /* Number of posted refreshes */ unsigned int obc_cfg; /* On-The-Fly Burst Chop Cfg */ unsigned int ap_en; /* Address Parity Enable */ @@ -639,15 +639,16 @@ static void set_ddr_sdram_cfg_2(fsl_ddr_cfg_regs_t *ddr, unsigned int rcw_en = 0; /* Register Control Word Enable */ unsigned int md_en = 0; /* Mirrored DIMM Enable */ unsigned int qd_en = 0; /* quad-rank DIMM Enable */ + int i; dll_rst_dis = 1; /* Make this configurable */ dqs_cfg = popts->DQS_config; - if (popts->cs_local_opts[0].odt_rd_cfg - || popts->cs_local_opts[0].odt_wr_cfg) { - /* FIXME */ - odt_cfg = 2; - } else { - odt_cfg = 0; + for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { + if (popts->cs_local_opts[i].odt_rd_cfg + || popts->cs_local_opts[i].odt_wr_cfg) { + odt_cfg = SDRAM_CFG2_ODT_ONLY_READ; + break; + } } num_pr = 1; /* Make this configurable */ @@ -1032,7 +1033,7 @@ static void set_ddr_sdram_mode(fsl_ddr_cfg_regs_t *ddr, #if defined(CONFIG_FSL_DDR2) const unsigned int mclk_ps = get_memory_clk_period_ps(); #endif - + dqs_en = !popts->DQS_config; rtt = fsl_ddr_get_rtt(); al = additive_latency; diff --git a/arch/powerpc/include/asm/fsl_ddr_sdram.h b/arch/powerpc/include/asm/fsl_ddr_sdram.h index bc063ea892..5b6e8d9830 100644 --- a/arch/powerpc/include/asm/fsl_ddr_sdram.h +++ b/arch/powerpc/include/asm/fsl_ddr_sdram.h @@ -92,6 +92,10 @@ typedef ddr3_spd_eeprom_t generic_spd_eeprom_t; #define SDRAM_CFG2_D_INIT 0x00000010 #define SDRAM_CFG2_ODT_CFG_MASK 0x00600000 +#define SDRAM_CFG2_ODT_NEVER 0 +#define SDRAM_CFG2_ODT_ONLY_WRITE 1 +#define SDRAM_CFG2_ODT_ONLY_READ 2 +#define SDRAM_CFG2_ODT_ALWAYS 3 #define TIMING_CFG_2_CPO_MASK 0x0F800000 |