cpu/mpc8xxx/ddr/options.c - platform/external/u-boot - Gitiles

 /*
  * Copyright 2008 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
  * Version 2 as published by the Free Software Foundation.
  */

 #include <common.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;
 	const char *p;

 	/* 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)
 	popts->OTF_burst_chop_en = 1;	/* on-the-fly burst chop */
 	popts->burst_length = DDR_OTF;	/* on-the-fly BC4 and BL8 */
 #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->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 the 2 memory
 	 * controllers.
 	 *
 	 * XXX: Attempt to set both 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 ((p = getenv("memctl_intlv_ctl")) != NULL) {
 		if (pdimm[0].n_ranks == 0) {
 			printf("There is no rank on CS0. Because only rank on "
 				"CS0 and ranks chip-select interleaved with CS0"
 				" are controller interleaved, force non memory "
 				"controller interleaving\n");
 			popts->memctl_interleaving = 0;
 		} else {
 			popts->memctl_interleaving = 1;
 			if (strcmp(p, "cacheline") == 0)
 				popts->memctl_interleaving_mode =
 					FSL_DDR_CACHE_LINE_INTERLEAVING;
 			else if (strcmp(p, "page") == 0)
 				popts->memctl_interleaving_mode =
 					FSL_DDR_PAGE_INTERLEAVING;
 			else if (strcmp(p, "bank") == 0)
 				popts->memctl_interleaving_mode =
 					FSL_DDR_BANK_INTERLEAVING;
 			else if (strcmp(p, "superbank") == 0)
 				popts->memctl_interleaving_mode =
 					FSL_DDR_SUPERBANK_INTERLEAVING;
 			else
 				popts->memctl_interleaving_mode =
 						simple_strtoul(p, NULL, 0);
 		}
 	}
 #endif

 	if( ((p = getenv("ba_intlv_ctl")) != NULL) &&
 		(CONFIG_CHIP_SELECTS_PER_CTRL > 1)) {
 		if (strcmp(p, "cs0_cs1") == 0)
 			popts->ba_intlv_ctl = FSL_DDR_CS0_CS1;
 		else if (strcmp(p, "cs2_cs3") == 0)
 			popts->ba_intlv_ctl = FSL_DDR_CS2_CS3;
 		else if (strcmp(p, "cs0_cs1_and_cs2_cs3") == 0)
 			popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_AND_CS2_CS3;
 		else if (strcmp(p, "cs0_cs1_cs2_cs3") == 0)
 			popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3;
 		else
 			popts->ba_intlv_ctl = simple_strtoul(p, NULL, 0);

 		switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
 		case FSL_DDR_CS0_CS1_CS2_CS3:
 		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, force non-interleaving!\n");
 			}
 			break;
 		case FSL_DDR_CS2_CS3:
 			if (pdimm[1].n_ranks !=2){
 				popts->ba_intlv_ctl = 0;
 				printf("Not enough bank(CS) for CS2+CS3, "
 					"force non-interleaving!\n");
 			}
 			break;
 		case FSL_DDR_CS0_CS1_AND_CS2_CS3:
 			if ((pdimm[0].n_ranks != 2)||(pdimm[1].n_ranks != 2)) {
 				popts->ba_intlv_ctl = 0;
 				printf("Not enough bank(CS) for CS0+CS1 or "
 					"CS2+CS3, force non-interleaving!\n");
 			}
 			break;
 		default:
 			popts->ba_intlv_ctl = 0;
 			break;
 		}
 	}

 	fsl_ddr_board_options(popts, pdimm, ctrl_num);

 	return 0;
 }
	/*
	* Copyright 2008 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
	* Version 2 as published by the Free Software Foundation.
	*/

	#include <common.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;
	const char *p;

	/* 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)
	popts->OTF_burst_chop_en = 1; /* on-the-fly burst chop */
	popts->burst_length = DDR_OTF; /* on-the-fly BC4 and BL8 */
	#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->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 the 2 memory
	* controllers.
	*
	* XXX: Attempt to set both 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 ((p = getenv("memctl_intlv_ctl")) != NULL) {
	if (pdimm[0].n_ranks == 0) {
	printf("There is no rank on CS0. Because only rank on "
	"CS0 and ranks chip-select interleaved with CS0"
	" are controller interleaved, force non memory "
	"controller interleaving\n");
	popts->memctl_interleaving = 0;
	} else {
	popts->memctl_interleaving = 1;
	if (strcmp(p, "cacheline") == 0)
	popts->memctl_interleaving_mode =
	FSL_DDR_CACHE_LINE_INTERLEAVING;
	else if (strcmp(p, "page") == 0)
	popts->memctl_interleaving_mode =
	FSL_DDR_PAGE_INTERLEAVING;
	else if (strcmp(p, "bank") == 0)
	popts->memctl_interleaving_mode =
	FSL_DDR_BANK_INTERLEAVING;
	else if (strcmp(p, "superbank") == 0)
	popts->memctl_interleaving_mode =
	FSL_DDR_SUPERBANK_INTERLEAVING;
	else
	popts->memctl_interleaving_mode =
	simple_strtoul(p, NULL, 0);
	}
	}
	#endif

	if( ((p = getenv("ba_intlv_ctl")) != NULL) &&
	(CONFIG_CHIP_SELECTS_PER_CTRL > 1)) {
	if (strcmp(p, "cs0_cs1") == 0)
	popts->ba_intlv_ctl = FSL_DDR_CS0_CS1;
	else if (strcmp(p, "cs2_cs3") == 0)
	popts->ba_intlv_ctl = FSL_DDR_CS2_CS3;
	else if (strcmp(p, "cs0_cs1_and_cs2_cs3") == 0)
	popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_AND_CS2_CS3;
	else if (strcmp(p, "cs0_cs1_cs2_cs3") == 0)
	popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3;
	else
	popts->ba_intlv_ctl = simple_strtoul(p, NULL, 0);

	switch (popts->ba_intlv_ctl & FSL_DDR_CS0_CS1_CS2_CS3) {
	case FSL_DDR_CS0_CS1_CS2_CS3:
	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, force non-interleaving!\n");
	}
	break;
	case FSL_DDR_CS2_CS3:
	if (pdimm[1].n_ranks !=2){
	popts->ba_intlv_ctl = 0;
	printf("Not enough bank(CS) for CS2+CS3, "
	"force non-interleaving!\n");
	}
	break;
	case FSL_DDR_CS0_CS1_AND_CS2_CS3:
	if ((pdimm[0].n_ranks != 2)\|\|(pdimm[1].n_ranks != 2)) {
	popts->ba_intlv_ctl = 0;
	printf("Not enough bank(CS) for CS0+CS1 or "
	"CS2+CS3, force non-interleaving!\n");
	}
	break;
	default:
	popts->ba_intlv_ctl = 0;
	break;
	}
	}

	fsl_ddr_board_options(popts, pdimm, ctrl_num);

	return 0;
	}