board/freescale/corenet_ds/ddr.c - boot/u-boot-linaro-stable - Git at Google

 /*
  * Copyright 2009-2011 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 <i2c.h>
 #include <hwconfig.h>
 #include <asm/mmu.h>
 #include <asm/fsl_ddr_sdram.h>
 #include <asm/fsl_ddr_dimm_params.h>
 #include <asm/fsl_law.h>

 DECLARE_GLOBAL_DATA_PTR;


 /*
  * Fixed sdram init -- doesn't use serial presence detect.
  */
 extern fixed_ddr_parm_t fixed_ddr_parm_0[];
 #if (CONFIG_NUM_DDR_CONTROLLERS == 2)
 extern fixed_ddr_parm_t fixed_ddr_parm_1[];
 #endif

 phys_size_t fixed_sdram(void)
 {
 	int i;
 	char buf[32];
 	fsl_ddr_cfg_regs_t ddr_cfg_regs;
 	phys_size_t ddr_size;
 	unsigned int lawbar1_target_id;
 	ulong ddr_freq, ddr_freq_mhz;

 	ddr_freq = get_ddr_freq(0);
 	ddr_freq_mhz = ddr_freq / 1000000;

 	printf("Configuring DDR for %s MT/s data rate\n",
 				strmhz(buf, ddr_freq));

 	for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
 		if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
 		   (ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
 			memcpy(&ddr_cfg_regs,
 				fixed_ddr_parm_0[i].ddr_settings,
 				sizeof(ddr_cfg_regs));
 			break;
 		}
 	}

 	if (fixed_ddr_parm_0[i].max_freq == 0)
 		panic("Unsupported DDR data rate %s MT/s data rate\n",
 			strmhz(buf, ddr_freq));

 	ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
 	ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
 	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);

 #if (CONFIG_NUM_DDR_CONTROLLERS == 2)
 	memcpy(&ddr_cfg_regs,
 		fixed_ddr_parm_1[i].ddr_settings,
 		sizeof(ddr_cfg_regs));
 	ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
 	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 1);
 #endif

 	/*
 	 * setup laws for DDR. If not interleaving, presuming half memory on
 	 * DDR1 and the other half on DDR2
 	 */
 	if (fixed_ddr_parm_0[i].ddr_settings->cs[0].config & 0x20000000) {
 		if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
 				 ddr_size,
 				 LAW_TRGT_IF_DDR_INTRLV) < 0) {
 			printf("ERROR setting Local Access Windows for DDR\n");
 			return 0;
 		}
 	} else {
 #if (CONFIG_NUM_DDR_CONTROLLERS == 2)
 		/* We require both controllers have identical DIMMs */
 		lawbar1_target_id = LAW_TRGT_IF_DDR_1;
 		if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
 				 ddr_size / 2,
 				 lawbar1_target_id) < 0) {
 			printf("ERROR setting Local Access Windows for DDR\n");
 			return 0;
 		}
 		lawbar1_target_id = LAW_TRGT_IF_DDR_2;
 		if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE + ddr_size / 2,
 				 ddr_size / 2,
 				 lawbar1_target_id) < 0) {
 			printf("ERROR setting Local Access Windows for DDR\n");
 			return 0;
 		}
 #else
 		lawbar1_target_id = LAW_TRGT_IF_DDR_1;
 		if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
 				 ddr_size,
 				 lawbar1_target_id) < 0) {
 			printf("ERROR setting Local Access Windows for DDR\n");
 			return 0;
 		}
 #endif
 	}
 	return ddr_size;
 }

 struct board_specific_parameters {
 	u32 n_ranks;
 	u32 datarate_mhz_high;
 	u32 clk_adjust;
 	u32 wrlvl_start;
 	u32 cpo;
 	u32 write_data_delay;
 	u32 force_2T;
 };

 /*
  * This table contains all valid speeds we want to override with board
  * specific parameters. datarate_mhz_high values need to be in ascending order
  * for each n_ranks group.
  */
 static const struct board_specific_parameters udimm0[] = {
 	/*
 	 * memory controller 0
 	 *   num|  hi|  clk| wrlvl | cpo  |wrdata|2T
 	 * ranks| mhz|adjst| start |      |delay |
 	 */
 	{4,   850,    4,     6,   0xff,    2,  0},
 	{4,   950,    5,     7,   0xff,    2,  0},
 	{4,  1050,    5,     8,   0xff,    2,  0},
 	{4,  1250,    5,    10,   0xff,    2,  0},
 	{4,  1350,    5,    11,   0xff,    2,  0},
 	{4,  1666,    5,    12,   0xff,    2,  0},
 	{2,   850,    5,     6,   0xff,    2,  0},
 	{2,  1050,    5,     7,   0xff,    2,  0},
 	{2,  1250,    4,     6,   0xff,    2,  0},
 	{2,  1350,    5,     7,   0xff,    2,  0},
 	{2,  1666,    5,     8,   0xff,    2,  0},
 	{1,   850,    4,     5,   0xff,    2,  0},
 	{1,   950,    4,     7,   0xff,    2,  0},
 	{1,  1666,    4,     8,   0xff,    2,  0},
 	{}
 };

 /*
  * The two slots have slightly different timing. The center values are good
  * for both slots. We use identical speed tables for them. In future use, if
  * DIMMs have fewer center values that require two separated tables, copy the
  * udimm0 table to udimm1 and make changes to clk_adjust and wrlvl_start.
  */
 static const struct board_specific_parameters *udimms[] = {
 	udimm0,
 	udimm0,
 };

 static const struct board_specific_parameters rdimm0[] = {
 	/*
 	 * memory controller 0
 	 *   num|  hi|  clk| wrlvl | cpo  |wrdata|2T
 	 * ranks| mhz|adjst| start |      |delay |
 	 */
 	{4,   850,    4,     6,   0xff,    2,  0},
 	{4,   950,    5,     7,   0xff,    2,  0},
 	{4,  1050,    5,     8,   0xff,    2,  0},
 	{4,  1250,    5,    10,   0xff,    2,  0},
 	{4,  1350,    5,    11,   0xff,    2,  0},
 	{4,  1666,    5,    12,   0xff,    2,  0},
 	{2,   850,    4,     6,   0xff,    2,  0},
 	{2,  1050,    4,     7,   0xff,    2,  0},
 	{2,  1666,    4,     8,   0xff,    2,  0},
 	{1,   850,    4,     5,   0xff,    2,  0},
 	{1,   950,    4,     7,   0xff,    2,  0},
 	{1,  1666,    4,     8,   0xff,    2,  0},
 	{}
 };

 /*
  * The two slots have slightly different timing. See comments above.
  */
 static const struct board_specific_parameters *rdimms[] = {
 	rdimm0,
 	rdimm0,
 };

 void fsl_ddr_board_options(memctl_options_t *popts,
 				dimm_params_t *pdimm,
 				unsigned int ctrl_num)
 {
 	const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
 	ulong ddr_freq;

 	if (ctrl_num > 1) {
 		printf("Wrong parameter for controller number %d", ctrl_num);
 		return;
 	}
 	if (!pdimm->n_ranks)
 		return;

 	if (popts->registered_dimm_en)
 		pbsp = rdimms[ctrl_num];
 	else
 		pbsp = udimms[ctrl_num];


 	/* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
 	 * freqency and n_banks specified in board_specific_parameters table.
 	 */
 	ddr_freq = get_ddr_freq(0) / 1000000;
 	while (pbsp->datarate_mhz_high) {
 		if (pbsp->n_ranks == pdimm->n_ranks) {
 			if (ddr_freq <= pbsp->datarate_mhz_high) {
 				popts->cpo_override = pbsp->cpo;
 				popts->write_data_delay =
 					pbsp->write_data_delay;
 				popts->clk_adjust = pbsp->clk_adjust;
 				popts->wrlvl_start = pbsp->wrlvl_start;
 				popts->twoT_en = pbsp->force_2T;
 				goto found;
 			}
 			pbsp_highest = pbsp;
 		}
 		pbsp++;
 	}

 	if (pbsp_highest) {
 		printf("Error: board specific timing not found "
 			"for data rate %lu MT/s!\n"
 			"Trying to use the highest speed (%u) parameters\n",
 			ddr_freq, pbsp_highest->datarate_mhz_high);
 		popts->cpo_override = pbsp_highest->cpo;
 		popts->write_data_delay = pbsp_highest->write_data_delay;
 		popts->clk_adjust = pbsp_highest->clk_adjust;
 		popts->wrlvl_start = pbsp_highest->wrlvl_start;
 		popts->twoT_en = pbsp_highest->force_2T;
 	} else {
 		panic("DIMM is not supported by this board");
 	}
 found:
 	/*
 	 * Factors to consider for half-strength driver enable:
 	 *	- number of DIMMs installed
 	 */
 	popts->half_strength_driver_enable = 0;
 	/*
 	 * Write leveling override
 	 */
 	popts->wrlvl_override = 1;
 	popts->wrlvl_sample = 0xf;

 	/*
 	 * Rtt and Rtt_WR override
 	 */
 	popts->rtt_override = 0;

 	/* Enable ZQ calibration */
 	popts->zq_en = 1;

 	/* DHC_EN =1, ODT = 60 Ohm */
 	popts->ddr_cdr1 = DDR_CDR1_DHC_EN;
 }

 phys_size_t initdram(int board_type)
 {
 	phys_size_t dram_size;

 	puts("Initializing....");

 	if (fsl_use_spd()) {
 		puts("using SPD\n");
 		dram_size = fsl_ddr_sdram();
 	} else {
 		puts("using fixed parameters\n");
 		dram_size = fixed_sdram();
 	}

 	dram_size = setup_ddr_tlbs(dram_size / 0x100000);
 	dram_size *= 0x100000;

 	debug("    DDR: ");
 	return dram_size;
 }
	/*
	* Copyright 2009-2011 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 <i2c.h>
	#include <hwconfig.h>
	#include <asm/mmu.h>
	#include <asm/fsl_ddr_sdram.h>
	#include <asm/fsl_ddr_dimm_params.h>
	#include <asm/fsl_law.h>

	DECLARE_GLOBAL_DATA_PTR;


	/*
	* Fixed sdram init -- doesn't use serial presence detect.
	*/
	extern fixed_ddr_parm_t fixed_ddr_parm_0[];
	#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
	extern fixed_ddr_parm_t fixed_ddr_parm_1[];
	#endif

	phys_size_t fixed_sdram(void)
	{
	int i;
	char buf[32];
	fsl_ddr_cfg_regs_t ddr_cfg_regs;
	phys_size_t ddr_size;
	unsigned int lawbar1_target_id;
	ulong ddr_freq, ddr_freq_mhz;

	ddr_freq = get_ddr_freq(0);
	ddr_freq_mhz = ddr_freq / 1000000;

	printf("Configuring DDR for %s MT/s data rate\n",
	strmhz(buf, ddr_freq));

	for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
	if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
	(ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
	memcpy(&ddr_cfg_regs,
	fixed_ddr_parm_0[i].ddr_settings,
	sizeof(ddr_cfg_regs));
	break;
	}
	}

	if (fixed_ddr_parm_0[i].max_freq == 0)
	panic("Unsupported DDR data rate %s MT/s data rate\n",
	strmhz(buf, ddr_freq));

	ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
	ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);

	#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
	memcpy(&ddr_cfg_regs,
	fixed_ddr_parm_1[i].ddr_settings,
	sizeof(ddr_cfg_regs));
	ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 1);
	#endif

	/*
	* setup laws for DDR. If not interleaving, presuming half memory on
	* DDR1 and the other half on DDR2
	*/
	if (fixed_ddr_parm_0[i].ddr_settings->cs[0].config & 0x20000000) {
	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
	ddr_size,
	LAW_TRGT_IF_DDR_INTRLV) < 0) {
	printf("ERROR setting Local Access Windows for DDR\n");
	return 0;
	}
	} else {
	#if (CONFIG_NUM_DDR_CONTROLLERS == 2)
	/* We require both controllers have identical DIMMs */
	lawbar1_target_id = LAW_TRGT_IF_DDR_1;
	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
	ddr_size / 2,
	lawbar1_target_id) < 0) {
	printf("ERROR setting Local Access Windows for DDR\n");
	return 0;
	}
	lawbar1_target_id = LAW_TRGT_IF_DDR_2;
	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE + ddr_size / 2,
	ddr_size / 2,
	lawbar1_target_id) < 0) {
	printf("ERROR setting Local Access Windows for DDR\n");
	return 0;
	}
	#else
	lawbar1_target_id = LAW_TRGT_IF_DDR_1;
	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
	ddr_size,
	lawbar1_target_id) < 0) {
	printf("ERROR setting Local Access Windows for DDR\n");
	return 0;
	}
	#endif
	}
	return ddr_size;
	}

	struct board_specific_parameters {
	u32 n_ranks;
	u32 datarate_mhz_high;
	u32 clk_adjust;
	u32 wrlvl_start;
	u32 cpo;
	u32 write_data_delay;
	u32 force_2T;
	};

	/*
	* This table contains all valid speeds we want to override with board
	* specific parameters. datarate_mhz_high values need to be in ascending order
	* for each n_ranks group.
	*/
	static const struct board_specific_parameters udimm0[] = {
	/*
	* memory controller 0
	* num\| hi\| clk\| wrlvl \| cpo \|wrdata\|2T
	* ranks\| mhz\|adjst\| start \| \|delay \|
	*/
	{4, 850, 4, 6, 0xff, 2, 0},
	{4, 950, 5, 7, 0xff, 2, 0},
	{4, 1050, 5, 8, 0xff, 2, 0},
	{4, 1250, 5, 10, 0xff, 2, 0},
	{4, 1350, 5, 11, 0xff, 2, 0},
	{4, 1666, 5, 12, 0xff, 2, 0},
	{2, 850, 5, 6, 0xff, 2, 0},
	{2, 1050, 5, 7, 0xff, 2, 0},
	{2, 1250, 4, 6, 0xff, 2, 0},
	{2, 1350, 5, 7, 0xff, 2, 0},
	{2, 1666, 5, 8, 0xff, 2, 0},
	{1, 850, 4, 5, 0xff, 2, 0},
	{1, 950, 4, 7, 0xff, 2, 0},
	{1, 1666, 4, 8, 0xff, 2, 0},
	{}
	};

	/*
	* The two slots have slightly different timing. The center values are good
	* for both slots. We use identical speed tables for them. In future use, if
	* DIMMs have fewer center values that require two separated tables, copy the
	* udimm0 table to udimm1 and make changes to clk_adjust and wrlvl_start.
	*/
	static const struct board_specific_parameters *udimms[] = {
	udimm0,
	udimm0,
	};

	static const struct board_specific_parameters rdimm0[] = {
	/*
	* memory controller 0
	* num\| hi\| clk\| wrlvl \| cpo \|wrdata\|2T
	* ranks\| mhz\|adjst\| start \| \|delay \|
	*/
	{4, 850, 4, 6, 0xff, 2, 0},
	{4, 950, 5, 7, 0xff, 2, 0},
	{4, 1050, 5, 8, 0xff, 2, 0},
	{4, 1250, 5, 10, 0xff, 2, 0},
	{4, 1350, 5, 11, 0xff, 2, 0},
	{4, 1666, 5, 12, 0xff, 2, 0},
	{2, 850, 4, 6, 0xff, 2, 0},
	{2, 1050, 4, 7, 0xff, 2, 0},
	{2, 1666, 4, 8, 0xff, 2, 0},
	{1, 850, 4, 5, 0xff, 2, 0},
	{1, 950, 4, 7, 0xff, 2, 0},
	{1, 1666, 4, 8, 0xff, 2, 0},
	{}
	};

	/*
	* The two slots have slightly different timing. See comments above.
	*/
	static const struct board_specific_parameters *rdimms[] = {
	rdimm0,
	rdimm0,
	};

	void fsl_ddr_board_options(memctl_options_t *popts,
	dimm_params_t *pdimm,
	unsigned int ctrl_num)
	{
	const struct board_specific_parameters pbsp, pbsp_highest = NULL;
	ulong ddr_freq;

	if (ctrl_num > 1) {
	printf("Wrong parameter for controller number %d", ctrl_num);
	return;
	}
	if (!pdimm->n_ranks)
	return;

	if (popts->registered_dimm_en)
	pbsp = rdimms[ctrl_num];
	else
	pbsp = udimms[ctrl_num];


	/* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
	* freqency and n_banks specified in board_specific_parameters table.
	*/
	ddr_freq = get_ddr_freq(0) / 1000000;
	while (pbsp->datarate_mhz_high) {
	if (pbsp->n_ranks == pdimm->n_ranks) {
	if (ddr_freq <= pbsp->datarate_mhz_high) {
	popts->cpo_override = pbsp->cpo;
	popts->write_data_delay =
	pbsp->write_data_delay;
	popts->clk_adjust = pbsp->clk_adjust;
	popts->wrlvl_start = pbsp->wrlvl_start;
	popts->twoT_en = pbsp->force_2T;
	goto found;
	}
	pbsp_highest = pbsp;
	}
	pbsp++;
	}

	if (pbsp_highest) {
	printf("Error: board specific timing not found "
	"for data rate %lu MT/s!\n"
	"Trying to use the highest speed (%u) parameters\n",
	ddr_freq, pbsp_highest->datarate_mhz_high);
	popts->cpo_override = pbsp_highest->cpo;
	popts->write_data_delay = pbsp_highest->write_data_delay;
	popts->clk_adjust = pbsp_highest->clk_adjust;
	popts->wrlvl_start = pbsp_highest->wrlvl_start;
	popts->twoT_en = pbsp_highest->force_2T;
	} else {
	panic("DIMM is not supported by this board");
	}
	found:
	/*
	* Factors to consider for half-strength driver enable:
	* - number of DIMMs installed
	*/
	popts->half_strength_driver_enable = 0;
	/*
	* Write leveling override
	*/
	popts->wrlvl_override = 1;
	popts->wrlvl_sample = 0xf;

	/*
	* Rtt and Rtt_WR override
	*/
	popts->rtt_override = 0;

	/* Enable ZQ calibration */
	popts->zq_en = 1;

	/* DHC_EN =1, ODT = 60 Ohm */
	popts->ddr_cdr1 = DDR_CDR1_DHC_EN;
	}

	phys_size_t initdram(int board_type)
	{
	phys_size_t dram_size;

	puts("Initializing....");

	if (fsl_use_spd()) {
	puts("using SPD\n");
	dram_size = fsl_ddr_sdram();
	} else {
	puts("using fixed parameters\n");
	dram_size = fixed_sdram();
	}

	dram_size = setup_ddr_tlbs(dram_size / 0x100000);
	dram_size *= 0x100000;

	debug(" DDR: ");
	return dram_size;
	}