u-boot/arch/powerpc/cpu/mpc8xxx/ddr/options.c

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/*
* Copyright 2008, 2010 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#include <common.h>
#include <hwconfig.h>
#include <asm/fsl_ddr_sdram.h>
#include "ddr.h"
/* Board-specific functions defined in each board's ddr.c */
extern void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num);
unsigned int populate_memctl_options(int all_DIMMs_registered,
memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
unsigned int i;
/* Chip select options. */
/* Pick chip-select local options. */
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
/* If not DDR2, odt_rd_cfg and odt_wr_cfg need to be 0. */
/* only for single CS? */
popts->cs_local_opts[i].odt_rd_cfg = 0;
popts->cs_local_opts[i].odt_wr_cfg = 1;
popts->cs_local_opts[i].auto_precharge = 0;
}
/* Pick interleaving mode. */
/*
* 0 = no interleaving
* 1 = interleaving between 2 controllers
*/
popts->memctl_interleaving = 0;
/*
* 0 = cacheline
* 1 = page
* 2 = (logical) bank
* 3 = superbank (only if CS interleaving is enabled)
*/
popts->memctl_interleaving_mode = 0;
/*
* 0: cacheline: bit 30 of the 36-bit physical addr selects the memctl
* 1: page: bit to the left of the column bits selects the memctl
* 2: bank: bit to the left of the bank bits selects the memctl
* 3: superbank: bit to the left of the chip select selects the memctl
*
* NOTE: ba_intlv (rank interleaving) is independent of memory
* controller interleaving; it is only within a memory controller.
* Must use superbank interleaving if rank interleaving is used and
* memory controller interleaving is enabled.
*/
/*
* 0 = no
* 0x40 = CS0,CS1
* 0x20 = CS2,CS3
* 0x60 = CS0,CS1 + CS2,CS3
* 0x04 = CS0,CS1,CS2,CS3
*/
popts->ba_intlv_ctl = 0;
/* Memory Organization Parameters */
popts->registered_dimm_en = all_DIMMs_registered;
/* Operational Mode Paramters */
/* Pick ECC modes */
#ifdef CONFIG_DDR_ECC
popts->ECC_mode = 1; /* 0 = disabled, 1 = enabled */
#else
popts->ECC_mode = 0; /* 0 = disabled, 1 = enabled */
#endif
popts->ECC_init_using_memctl = 1; /* 0 = use DMA, 1 = use memctl */
/*
* Choose DQS config
* 0 for DDR1
* 1 for DDR2
*/
#if defined(CONFIG_FSL_DDR1)
popts->DQS_config = 0;
#elif defined(CONFIG_FSL_DDR2) || defined(CONFIG_FSL_DDR3)
popts->DQS_config = 1;
#endif
/* Choose self-refresh during sleep. */
popts->self_refresh_in_sleep = 1;
/* Choose dynamic power management mode. */
popts->dynamic_power = 0;
/* 0 = 64-bit, 1 = 32-bit, 2 = 16-bit */
popts->data_bus_width = 0;
/* Choose burst length. */
#if defined(CONFIG_FSL_DDR3)
#if defined(CONFIG_E500MC)
popts->OTF_burst_chop_en = 0; /* on-the-fly burst chop disable */
popts->burst_length = DDR_BL8; /* Fixed 8-beat burst len */
#else
popts->OTF_burst_chop_en = 1; /* on-the-fly burst chop */
popts->burst_length = DDR_OTF; /* on-the-fly BC4 and BL8 */
#endif
#else
popts->burst_length = DDR_BL4; /* has to be 4 for DDR2 */
#endif
/* Choose ddr controller address mirror mode */
#if defined(CONFIG_FSL_DDR3)
popts->mirrored_dimm = pdimm[0].mirrored_dimm;
#endif
/* Global Timing Parameters. */
debug("mclk_ps = %u ps\n", get_memory_clk_period_ps());
/* Pick a caslat override. */
popts->cas_latency_override = 0;
popts->cas_latency_override_value = 3;
if (popts->cas_latency_override) {
debug("using caslat override value = %u\n",
popts->cas_latency_override_value);
}
/* Decide whether to use the computed derated latency */
popts->use_derated_caslat = 0;
/* Choose an additive latency. */
popts->additive_latency_override = 0;
popts->additive_latency_override_value = 3;
if (popts->additive_latency_override) {
debug("using additive latency override value = %u\n",
popts->additive_latency_override_value);
}
/*
* 2T_EN setting
*
* Factors to consider for 2T_EN:
* - number of DIMMs installed
* - number of components, number of active ranks
* - how much time you want to spend playing around
*/
popts->twoT_en = 0;
popts->threeT_en = 0;
/*
* BSTTOPRE precharge interval
*
* Set this to 0 for global auto precharge
*
* FIXME: Should this be configured in picoseconds?
* Why it should be in ps: better understanding of this
* relative to actual DRAM timing parameters such as tRAS.
* e.g. tRAS(min) = 40 ns
*/
popts->bstopre = 0x100;
/* Minimum CKE pulse width -- tCKE(MIN) */
popts->tCKE_clock_pulse_width_ps
= mclk_to_picos(FSL_DDR_MIN_TCKE_PULSE_WIDTH_DDR);
/*
* Window for four activates -- tFAW
*
* FIXME: UM: applies only to DDR2/DDR3 with eight logical banks only
* FIXME: varies depending upon number of column addresses or data
* FIXME: width, was considering looking at pdimm->primary_sdram_width
*/
#if defined(CONFIG_FSL_DDR1)
popts->tFAW_window_four_activates_ps = mclk_to_picos(1);
#elif defined(CONFIG_FSL_DDR2)
/*
* x4/x8; some datasheets have 35000
* x16 wide columns only? Use 50000?
*/
popts->tFAW_window_four_activates_ps = 37500;
#elif defined(CONFIG_FSL_DDR3)
popts->tFAW_window_four_activates_ps = pdimm[0].tFAW_ps;
#endif
popts->zq_en = 0;
popts->wrlvl_en = 0;
#if defined(CONFIG_FSL_DDR3)
/*
* due to ddr3 dimm is fly-by topology
* we suggest to enable write leveling to
* meet the tQDSS under different loading.
*/
popts->wrlvl_en = 1;
popts->zq_en = 1;
popts->wrlvl_override = 0;
#endif
/*
* Check interleaving configuration from environment.
* Please refer to doc/README.fsl-ddr for the detail.
*
* If memory controller interleaving is enabled, then the data
* bus widths must be programmed identically for all memory controllers.
*
* XXX: Attempt to set all controllers to the same chip select
* interleaving mode. It will do a best effort to get the
* requested ranks interleaved together such that the result
* should be a subset of the requested configuration.
*/
#if (CONFIG_NUM_DDR_CONTROLLERS > 1)
if (hwconfig_sub("fsl_ddr", "ctlr_intlv")) {
if (pdimm[0].n_ranks == 0) {
printf("There is no rank on CS0 for controller %d. Because only"
" rank on CS0 and ranks chip-select interleaved with CS0"
" are controller interleaved, force non memory "
"controller interleaving\n", ctrl_num);
popts->memctl_interleaving = 0;
} else {
popts->memctl_interleaving = 1;
/*
* test null first. if CONFIG_HWCONFIG is not defined
* hwconfig_arg_cmp returns non-zero
*/
if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "null")) {
popts->memctl_interleaving = 0;
debug("memory controller interleaving disabled.\n");
} else if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "cacheline"))
popts->memctl_interleaving_mode =
FSL_DDR_CACHE_LINE_INTERLEAVING;
else if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "page"))
popts->memctl_interleaving_mode =
FSL_DDR_PAGE_INTERLEAVING;
else if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "bank"))
popts->memctl_interleaving_mode =
FSL_DDR_BANK_INTERLEAVING;
else if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "superbank"))
popts->memctl_interleaving_mode =
FSL_DDR_SUPERBANK_INTERLEAVING;
else {
popts->memctl_interleaving = 0;
printf("hwconfig has unrecognized parameter for ctlr_intlv.\n");
}
}
}
#endif
if ((hwconfig_sub("fsl_ddr", "bank_intlv")) &&
(CONFIG_CHIP_SELECTS_PER_CTRL > 1)) {
/* test null first. if CONFIG_HWCONFIG is not defined,
* hwconfig_arg_cmp returns non-zero */
if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "null"))
debug("bank interleaving disabled.\n");
else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs0_cs1"))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1;
else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs2_cs3"))
popts->ba_intlv_ctl = FSL_DDR_CS2_CS3;
else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs0_cs1_and_cs2_cs3"))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_AND_CS2_CS3;
else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs0_cs1_cs2_cs3"))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3;
else
printf("hwconfig has unrecognized parameter for bank_intlv.\n");
switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
case FSL_DDR_CS0_CS1_CS2_CS3:
#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
if (pdimm[0].n_ranks < 4) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for "
"CS0+CS1+CS2+CS3 on controller %d, "
"force non-interleaving!\n", ctrl_num);
}
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
if ((pdimm[0].n_ranks < 2) && (pdimm[1].n_ranks < 2)) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for "
"CS0+CS1+CS2+CS3 on controller %d, "
"force non-interleaving!\n", ctrl_num);
}
if (pdimm[0].capacity != pdimm[1].capacity) {
popts->ba_intlv_ctl = 0;
printf("Not identical DIMM size for "
"CS0+CS1+CS2+CS3 on controller %d, "
"force non-interleaving!\n", ctrl_num);
}
#endif
break;
case FSL_DDR_CS0_CS1:
if (pdimm[0].n_ranks < 2) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for "
"CS0+CS1 on controller %d, "
"force non-interleaving!\n", ctrl_num);
}
break;
case FSL_DDR_CS2_CS3:
#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
if (pdimm[0].n_ranks < 4) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for CS2+CS3 "
"on controller %d, force non-interleaving!\n", ctrl_num);
}
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
if (pdimm[1].n_ranks < 2) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(chip-select) for CS2+CS3 "
"on controller %d, force non-interleaving!\n", ctrl_num);
}
#endif
break;
case FSL_DDR_CS0_CS1_AND_CS2_CS3:
#if (CONFIG_DIMM_SLOTS_PER_CTLR == 1)
if (pdimm[0].n_ranks < 4) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(CS) for CS0+CS1 and "
"CS2+CS3 on controller %d, "
"force non-interleaving!\n", ctrl_num);
}
#elif (CONFIG_DIMM_SLOTS_PER_CTLR == 2)
if ((pdimm[0].n_ranks < 2) || (pdimm[1].n_ranks < 2)) {
popts->ba_intlv_ctl = 0;
printf("Not enough bank(CS) for CS0+CS1 and "
"CS2+CS3 on controller %d, "
"force non-interleaving!\n", ctrl_num);
}
#endif
break;
default:
popts->ba_intlv_ctl = 0;
break;
}
}
if (hwconfig_sub("fsl_ddr", "addr_hash")) {
if (hwconfig_subarg_cmp("fsl_ddr", "addr_hash", "null"))
popts->addr_hash = 0;
else if (hwconfig_subarg_cmp("fsl_ddr", "addr_hash", "true"))
popts->addr_hash = 1;
}
if (pdimm[0].n_ranks == 4)
popts->quad_rank_present = 1;
fsl_ddr_board_options(popts, pdimm, ctrl_num);
return 0;
}
void check_interleaving_options(fsl_ddr_info_t *pinfo)
{
int i, j, check_n_ranks, intlv_fixed = 0;
unsigned long long check_rank_density;
/*
* Check if all controllers are configured for memory
* controller interleaving. Identical dimms are recommended. At least
* the size should be checked.
*/
j = 0;
check_n_ranks = pinfo->dimm_params[0][0].n_ranks;
check_rank_density = pinfo->dimm_params[0][0].rank_density;
for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) {
if ((pinfo->memctl_opts[i].memctl_interleaving) && \
(check_rank_density == pinfo->dimm_params[i][0].rank_density) && \
(check_n_ranks == pinfo->dimm_params[i][0].n_ranks)) {
j++;
}
}
if (j != CONFIG_NUM_DDR_CONTROLLERS) {
for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++)
if (pinfo->memctl_opts[i].memctl_interleaving) {
pinfo->memctl_opts[i].memctl_interleaving = 0;
intlv_fixed = 1;
}
if (intlv_fixed)
printf("Not all DIMMs are identical in size. "
"Memory controller interleaving disabled.\n");
}
}