diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc8xxx/ddr/options.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/options.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/options.c b/arch/powerpc/cpu/mpc8xxx/ddr/options.c index 13e482527..2f13b8fd9 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/options.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/options.c @@ -474,6 +474,34 @@ static const struct dynamic_odt odt_unknown[4] = { } }; #endif + +/* + * Automatically seleect bank interleaving mode based on DIMMs + * in this order: cs0_cs1_cs2_cs3, cs0_cs1, null. + * This function only deal with one or two slots per controller. + */ +static inline unsigned int auto_bank_intlv(dimm_params_t *pdimm) +{ +#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1) + if (pdimm[0].n_ranks == 4) + return FSL_DDR_CS0_CS1_CS2_CS3; + else if (pdimm[0].n_ranks == 2) + return FSL_DDR_CS0_CS1; +#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2) +#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE + if (pdimm[0].n_ranks == 4) + return FSL_DDR_CS0_CS1_CS2_CS3; +#endif + if (pdimm[0].n_ranks == 2) { + if (pdimm[1].n_ranks == 2) + return FSL_DDR_CS0_CS1_CS2_CS3; + else + return FSL_DDR_CS0_CS1; + } +#endif + return 0; +} + unsigned int populate_memctl_options(int all_DIMMs_registered, memctl_options_t *popts, dimm_params_t *pdimm, @@ -510,6 +538,14 @@ unsigned int populate_memctl_options(int all_DIMMs_registered, } } else if (CONFIG_DIMM_SLOTS_PER_CTLR == 2) { switch (pdimm[0].n_ranks) { +#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE + case 4: + pdodt = single_Q; + if (pdimm[1].n_ranks) + printf("Error: Quad- and Dual-rank DIMMs " + "cannot be used together\n"); + break; +#endif case 2: switch (pdimm[1].n_ranks) { case 2: @@ -900,6 +936,9 @@ done: else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv", "cs0_cs1_cs2_cs3", buf)) popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3; + else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv", + "auto", buf)) + popts->ba_intlv_ctl = auto_bank_intlv(pdimm); else printf("hwconfig has unrecognized parameter for bank_intlv.\n"); switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) { @@ -912,6 +951,10 @@ done: "interleaving disabled!\n", ctrl_num); } #elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2) +#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE + if (pdimm[0].n_ranks == 4) + break; +#endif if ((pdimm[0].n_ranks < 2) && (pdimm[1].n_ranks < 2)) { popts->ba_intlv_ctl = 0; printf("Not enough bank(chip-select) for " @@ -1063,7 +1106,7 @@ void check_interleaving_options(fsl_ddr_info_t *pinfo) break; } debug("%d of %d controllers are interleaving.\n", j, k); - if (j != k) { + if (j && (j != k)) { for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) pinfo->memctl_opts[i].memctl_interleaving = 0; printf("Not all controllers have compatible " |