diff options
Diffstat (limited to 'arch/powerpc/cpu')
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c | 62 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c | 16 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/options.c | 12 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8xxx/ddr/util.c | 12 |
4 files changed, 85 insertions, 17 deletions
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c index c28f9cd..5928eb8 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/ctrl_regs.c @@ -229,6 +229,26 @@ static void set_csn_config_2(int i, fsl_ddr_cfg_regs_t *ddr) /* -3E = 667 CL5, -25 = CL6 800, -25E = CL5 800 */ #if !defined(CONFIG_FSL_DDR1) +static inline int avoid_odt_overlap(const dimm_params_t *dimm_params) +{ +#if CONFIG_DIMM_SLOTS_PER_CTLR == 1 + if (dimm_params[0].n_ranks == 4) + return 1; +#endif + +#if CONFIG_DIMM_SLOTS_PER_CTLR == 2 + if ((dimm_params[0].n_ranks == 2) && + (dimm_params[1].n_ranks == 2)) + return 1; + +#ifdef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE + if (dimm_params[0].n_ranks == 4) + return 1; +#endif +#endif + return 0; +} + /* * DDR SDRAM Timing Configuration 0 (TIMING_CFG_0) * @@ -236,7 +256,8 @@ static void set_csn_config_2(int i, fsl_ddr_cfg_regs_t *ddr) * dreams up non-zero default values to be backwards compatible. */ static void set_timing_cfg_0(fsl_ddr_cfg_regs_t *ddr, - const memctl_options_t *popts) + const memctl_options_t *popts, + const dimm_params_t *dimm_params) { unsigned char trwt_mclk = 0; /* Read-to-write turnaround */ unsigned char twrt_mclk = 0; /* Write-to-read turnaround */ @@ -266,7 +287,18 @@ static void set_timing_cfg_0(fsl_ddr_cfg_regs_t *ddr, unsigned int data_rate = get_ddr_freq(0); tmrd_mclk = 4; /* set the turnaround time */ - trwt_mclk = 1; + + /* + * for single quad-rank DIMM and two dual-rank DIMMs + * to avoid ODT overlap + */ + if (avoid_odt_overlap(dimm_params)) { + twwt_mclk = 2; + trrt_mclk = 1; + } + /* for faster clock, need more time for data setup */ + trwt_mclk = (data_rate/1000000 > 1800) ? 2 : 1; + if ((data_rate/1000000 > 1150) || (popts->memctl_interleaving)) twrt_mclk = 1; @@ -1483,7 +1515,7 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, break; } sa = common_dimm->base_address; - ea = common_dimm->total_mem - 1; + ea = sa + common_dimm->total_mem - 1; } else if (!popts->memctl_interleaving) { /* * If memory interleaving between controllers is NOT @@ -1497,7 +1529,7 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) { case FSL_DDR_CS0_CS1_CS2_CS3: sa = common_dimm->base_address; - ea = common_dimm->total_mem - 1; + ea = sa + common_dimm->total_mem - 1; break; case FSL_DDR_CS0_CS1_AND_CS2_CS3: if ((i >= 2) && (dimm_number == 0)) { @@ -1554,17 +1586,19 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, sa >>= 24; ea >>= 24; - ddr->cs[i].bnds = (0 - | ((sa & 0xFFF) << 16) /* starting address MSB */ - | ((ea & 0xFFF) << 0) /* ending address MSB */ - ); + if (cs_en) { + ddr->cs[i].bnds = (0 + | ((sa & 0xFFF) << 16)/* starting address MSB */ + | ((ea & 0xFFF) << 0) /* ending address MSB */ + ); + } else { + debug("FSLDDR: setting bnds to 0 for inactive CS\n"); + ddr->cs[i].bnds = 0; + } debug("FSLDDR: cs[%d]_bnds = 0x%08x\n", i, ddr->cs[i].bnds); - if (cs_en) { - set_csn_config(dimm_number, i, ddr, popts, dimm_params); - set_csn_config_2(i, ddr); - } else - debug("CS%d is disabled.\n", i); + set_csn_config(dimm_number, i, ddr, popts, dimm_params); + set_csn_config_2(i, ddr); } /* @@ -1577,7 +1611,7 @@ compute_fsl_memctl_config_regs(const memctl_options_t *popts, set_ddr_eor(ddr, popts); #if !defined(CONFIG_FSL_DDR1) - set_timing_cfg_0(ddr, popts); + set_timing_cfg_0(ddr, popts, dimm_params); #endif set_timing_cfg_3(ddr, popts, common_dimm, cas_latency); diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c index 03a784c..6a1f4e4 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c @@ -76,7 +76,7 @@ compute_cas_latency_ddr3(const dimm_params_t *dimm_params, unsigned int compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params, common_timing_params_t *outpdimm, - unsigned int number_of_dimms) + const unsigned int number_of_dimms) { unsigned int i, j; @@ -126,13 +126,20 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params, temp1++; continue; } + + /* + * check if quad-rank DIMM is plugged if + * CONFIG_CHIP_SELECT_QUAD_CAPABLE is not defined + * Only the board with proper design is capable + */ +#ifndef CONFIG_FSL_DDR_FIRST_SLOT_QUAD_CAPABLE if (dimm_params[i].n_ranks == 4 && \ CONFIG_CHIP_SELECTS_PER_CTRL/CONFIG_DIMM_SLOTS_PER_CTLR < 4) { printf("Found Quad-rank DIMM, not able to support."); temp1++; continue; } - +#endif /* * Find minimum tCKmax_ps to find fastest slow speed, * i.e., this is the slowest the whole system can go. @@ -236,11 +243,14 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params, if (outpdimm->all_DIMMs_registered) for (j = 0; j < 16; j++) { outpdimm->rcw[j] = dimm_params[0].rcw[j]; - for (i = 1; i < number_of_dimms; i++) + for (i = 1; i < number_of_dimms; i++) { + if (!dimm_params[i].n_ranks) + continue; if (dimm_params[i].rcw[j] != dimm_params[0].rcw[j]) { temp1 = 1; break; } + } } if (temp1 != 0) diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/options.c b/arch/powerpc/cpu/mpc8xxx/ddr/options.c index 13e4825..1188df9 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/options.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/options.c @@ -510,6 +510,14 @@ 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: @@ -912,6 +920,10 @@ 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 " diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/util.c b/arch/powerpc/cpu/mpc8xxx/ddr/util.c index 664ad09..b439cc9 100644 --- a/arch/powerpc/cpu/mpc8xxx/ddr/util.c +++ b/arch/powerpc/cpu/mpc8xxx/ddr/util.c @@ -140,6 +140,18 @@ void board_add_ram_info(int use_default) uint32_t sdram_cfg = in_be32(&ddr->sdram_cfg); int cas_lat; +#if CONFIG_NUM_DDR_CONTROLLERS >= 2 + if (!(sdram_cfg & SDRAM_CFG_MEM_EN)) { + ddr = (void *)CONFIG_SYS_MPC85xx_DDR2_ADDR; + sdram_cfg = in_be32(&ddr->sdram_cfg); + } +#endif +#if CONFIG_NUM_DDR_CONTROLLERS >= 3 + if (!(sdram_cfg & SDRAM_CFG_MEM_EN)) { + ddr = (void *)CONFIG_SYS_MPC85xx_DDR3_ADDR; + sdram_cfg = in_be32(&ddr->sdram_cfg); + } +#endif puts(" (DDR"); switch ((sdram_cfg & SDRAM_CFG_SDRAM_TYPE_MASK) >> SDRAM_CFG_SDRAM_TYPE_SHIFT) { |