ctrl_regs.c

			esdmode2 |= (rtt_wr & 0x3) << 9;
			switch (i) {
			case 1:
				ddr->ddr_sdram_mode_4 = (0
					| ((esdmode2 & 0xFFFF) << 16)
					| ((esdmode3 & 0xFFFF) << 0)
					);
				break;
			case 2:
				ddr->ddr_sdram_mode_6 = (0
					| ((esdmode2 & 0xFFFF) << 16)
					| ((esdmode3 & 0xFFFF) << 0)
					);
				break;
			case 3:
				ddr->ddr_sdram_mode_8 = (0
					| ((esdmode2 & 0xFFFF) << 16)
					| ((esdmode3 & 0xFFFF) << 0)
					);
				break;
			}
		}
		debug("FSLDDR: ddr_sdram_mode_4 = 0x%08x\n",
		      ddr->ddr_sdram_mode_4);
		debug("FSLDDR: ddr_sdram_mode_6 = 0x%08x\n",
		      ddr->ddr_sdram_mode_6);
		debug("FSLDDR: ddr_sdram_mode_8 = 0x%08x\n",
		      ddr->ddr_sdram_mode_8);
	}
}
#elif defined(CONFIG_SYS_FSL_DDR3)
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
static void set_ddr_sdram_mode_2(const unsigned int ctrl_num,
				fsl_ddr_cfg_regs_t *ddr,
				const memctl_options_t *popts,
				const common_timing_params_t *common_dimm,
				const unsigned int unq_mrs_en)
{
	unsigned short esdmode2 = 0;	/* Extended SDRAM mode 2 */
	unsigned short esdmode3 = 0;	/* Extended SDRAM mode 3 */
	int i;
	unsigned int rtt_wr = 0;	/* Rtt_WR - dynamic ODT off */
	unsigned int srt = 0;	/* self-refresh temerature, normal range */
	unsigned int asr = 0;	/* auto self-refresh disable */
	unsigned int cwl = compute_cas_write_latency(ctrl_num) - 5;
	unsigned int pasr = 0;	/* partial array self refresh disable */

	if (popts->rtt_override)
		rtt_wr = popts->rtt_wr_override_value;
	else
		rtt_wr = popts->cs_local_opts[0].odt_rtt_wr;

	if (common_dimm->extended_op_srt)
		srt = common_dimm->extended_op_srt;

	esdmode2 = (0
		| ((rtt_wr & 0x3) << 9)
		| ((srt & 0x1) << 7)
		| ((asr & 0x1) << 6)
		| ((cwl & 0x7) << 3)
		| ((pasr & 0x7) << 0));
	ddr->ddr_sdram_mode_2 = (0
				 | ((esdmode2 & 0xFFFF) << 16)
				 | ((esdmode3 & 0xFFFF) << 0)
				 );
	debug("FSLDDR: ddr_sdram_mode_2 = 0x%08x\n", ddr->ddr_sdram_mode_2);

	if (unq_mrs_en) {	/* unique mode registers are supported */
		for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
			if (popts->rtt_override)
				rtt_wr = popts->rtt_wr_override_value;
			else
				rtt_wr = popts->cs_local_opts[i].odt_rtt_wr;

			esdmode2 &= 0xF9FF;	/* clear bit 10, 9 */
			esdmode2 |= (rtt_wr & 0x3) << 9;
			switch (i) {
			case 1:
				ddr->ddr_sdram_mode_4 = (0
					| ((esdmode2 & 0xFFFF) << 16)
					| ((esdmode3 & 0xFFFF) << 0)
					);
				break;
			case 2:
				ddr->ddr_sdram_mode_6 = (0
					| ((esdmode2 & 0xFFFF) << 16)
					| ((esdmode3 & 0xFFFF) << 0)
					);
				break;
			case 3:
				ddr->ddr_sdram_mode_8 = (0
					| ((esdmode2 & 0xFFFF) << 16)
					| ((esdmode3 & 0xFFFF) << 0)
					);
				break;
			}
		}
		debug("FSLDDR: ddr_sdram_mode_4 = 0x%08x\n",
			ddr->ddr_sdram_mode_4);
		debug("FSLDDR: ddr_sdram_mode_6 = 0x%08x\n",
			ddr->ddr_sdram_mode_6);
		debug("FSLDDR: ddr_sdram_mode_8 = 0x%08x\n",
			ddr->ddr_sdram_mode_8);
	}
}

#else /* for DDR2 and DDR1 */
/* DDR SDRAM Mode configuration 2 (DDR_SDRAM_MODE_2) */
static void set_ddr_sdram_mode_2(const unsigned int ctrl_num,
				fsl_ddr_cfg_regs_t *ddr,
				const memctl_options_t *popts,
				const common_timing_params_t *common_dimm,
				const unsigned int unq_mrs_en)
{
	unsigned short esdmode2 = 0;	/* Extended SDRAM mode 2 */
	unsigned short esdmode3 = 0;	/* Extended SDRAM mode 3 */

	ddr->ddr_sdram_mode_2 = (0
				 | ((esdmode2 & 0xFFFF) << 16)
				 | ((esdmode3 & 0xFFFF) << 0)
				 );
	debug("FSLDDR: ddr_sdram_mode_2 = 0x%08x\n", ddr->ddr_sdram_mode_2);
}
#endif

#ifdef CONFIG_SYS_FSL_DDR4
/* DDR SDRAM Mode configuration 9 (DDR_SDRAM_MODE_9) */
static void set_ddr_sdram_mode_9(fsl_ddr_cfg_regs_t *ddr,
				const memctl_options_t *popts,
				const common_timing_params_t *common_dimm,
				const unsigned int unq_mrs_en)
{
	int i;
	unsigned short esdmode4 = 0;	/* Extended SDRAM mode 4 */
	unsigned short esdmode5;	/* Extended SDRAM mode 5 */
	int rtt_park = 0;
	bool four_cs = false;

#if CONFIG_CHIP_SELECTS_PER_CTRL == 4
	if ((ddr->cs[0].config & SDRAM_CS_CONFIG_EN) &&
	    (ddr->cs[1].config & SDRAM_CS_CONFIG_EN) &&
	    (ddr->cs[2].config & SDRAM_CS_CONFIG_EN) &&
	    (ddr->cs[3].config & SDRAM_CS_CONFIG_EN))
		four_cs = true;
#endif
	if (ddr->cs[0].config & SDRAM_CS_CONFIG_EN) {
		esdmode5 = 0x00000500;	/* Data mask enable, RTT_PARK CS0 */
		rtt_park = four_cs ? 0 : 1;
	} else {
		esdmode5 = 0x00000400;	/* Data mask enabled */
	}

	ddr->ddr_sdram_mode_9 = (0
				 | ((esdmode4 & 0xffff) << 16)
				 | ((esdmode5 & 0xffff) << 0)
				);

	/* Normally only the first enabled CS use 0x500, others use 0x400
	 * But when four chip-selects are all enabled, all mode registers
	 * need 0x500 to park.
	 */

	debug("FSLDDR: ddr_sdram_mode_9) = 0x%08x\n", ddr->ddr_sdram_mode_9);
	if (unq_mrs_en) {	/* unique mode registers are supported */
		for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
			if (!rtt_park &&
			    (ddr->cs[i].config & SDRAM_CS_CONFIG_EN)) {
				esdmode5 |= 0x00000500;	/* RTT_PARK */
				rtt_park = four_cs ? 0 : 1;
			} else {
				esdmode5 = 0x00000400;
			}
			switch (i) {
			case 1:
				ddr->ddr_sdram_mode_11 = (0
					| ((esdmode4 & 0xFFFF) << 16)
					| ((esdmode5 & 0xFFFF) << 0)
					);
				break;
			case 2:
				ddr->ddr_sdram_mode_13 = (0
					| ((esdmode4 & 0xFFFF) << 16)
					| ((esdmode5 & 0xFFFF) << 0)
					);
				break;
			case 3:
				ddr->ddr_sdram_mode_15 = (0
					| ((esdmode4 & 0xFFFF) << 16)
					| ((esdmode5 & 0xFFFF) << 0)
					);
				break;
			}
		}
		debug("FSLDDR: ddr_sdram_mode_11 = 0x%08x\n",
		      ddr->ddr_sdram_mode_11);
		debug("FSLDDR: ddr_sdram_mode_13 = 0x%08x\n",
		      ddr->ddr_sdram_mode_13);
		debug("FSLDDR: ddr_sdram_mode_15 = 0x%08x\n",
		      ddr->ddr_sdram_mode_15);
	}
}

/* DDR SDRAM Mode configuration 10 (DDR_SDRAM_MODE_10) */
static void set_ddr_sdram_mode_10(const unsigned int ctrl_num,
				fsl_ddr_cfg_regs_t *ddr,
				const memctl_options_t *popts,
				const common_timing_params_t *common_dimm,
				const unsigned int unq_mrs_en)
{
	int i;
	unsigned short esdmode6 = 0;	/* Extended SDRAM mode 6 */
	unsigned short esdmode7 = 0;	/* Extended SDRAM mode 7 */
	unsigned int tccdl_min = picos_to_mclk(ctrl_num, common_dimm->tccdl_ps);

	esdmode6 = ((tccdl_min - 4) & 0x7) << 10;

	if (popts->ddr_cdr2 & DDR_CDR2_VREF_RANGE_2)
		esdmode6 |= 1 << 6;	/* Range 2 */

	ddr->ddr_sdram_mode_10 = (0
				 | ((esdmode6 & 0xffff) << 16)
				 | ((esdmode7 & 0xffff) << 0)
				);
	debug("FSLDDR: ddr_sdram_mode_10) = 0x%08x\n", ddr->ddr_sdram_mode_10);
	if (unq_mrs_en) {	/* unique mode registers are supported */
		for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
			switch (i) {
			case 1:
				ddr->ddr_sdram_mode_12 = (0
					| ((esdmode6 & 0xFFFF) << 16)
					| ((esdmode7 & 0xFFFF) << 0)
					);
				break;
			case 2:
				ddr->ddr_sdram_mode_14 = (0
					| ((esdmode6 & 0xFFFF) << 16)
					| ((esdmode7 & 0xFFFF) << 0)
					);
				break;
			case 3:
				ddr->ddr_sdram_mode_16 = (0
					| ((esdmode6 & 0xFFFF) << 16)
					| ((esdmode7 & 0xFFFF) << 0)
					);
				break;
			}
		}
		debug("FSLDDR: ddr_sdram_mode_12 = 0x%08x\n",
		      ddr->ddr_sdram_mode_12);
		debug("FSLDDR: ddr_sdram_mode_14 = 0x%08x\n",
		      ddr->ddr_sdram_mode_14);
		debug("FSLDDR: ddr_sdram_mode_16 = 0x%08x\n",
		      ddr->ddr_sdram_mode_16);
	}
}

#endif

/* DDR SDRAM Interval Configuration (DDR_SDRAM_INTERVAL) */
static void set_ddr_sdram_interval(const unsigned int ctrl_num,
				fsl_ddr_cfg_regs_t *ddr,
				const memctl_options_t *popts,
				const common_timing_params_t *common_dimm)
{
	unsigned int refint;	/* Refresh interval */
	unsigned int bstopre;	/* Precharge interval */

	refint = picos_to_mclk(ctrl_num, common_dimm->refresh_rate_ps);

	bstopre = popts->bstopre;

	/* refint field used 0x3FFF in earlier controllers */
	ddr->ddr_sdram_interval = (0
				   | ((refint & 0xFFFF) << 16)
				   | ((bstopre & 0x3FFF) << 0)
				   );
	debug("FSLDDR: ddr_sdram_interval = 0x%08x\n", ddr->ddr_sdram_interval);
}

#ifdef CONFIG_SYS_FSL_DDR4
/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
			       fsl_ddr_cfg_regs_t *ddr,
			       const memctl_options_t *popts,
			       const common_timing_params_t *common_dimm,
			       unsigned int cas_latency,
			       unsigned int additive_latency,
			       const unsigned int unq_mrs_en)
{
	int i;
	unsigned short esdmode;		/* Extended SDRAM mode */
	unsigned short sdmode;		/* SDRAM mode */

	/* Mode Register - MR1 */
	unsigned int qoff = 0;		/* Output buffer enable 0=yes, 1=no */
	unsigned int tdqs_en = 0;	/* TDQS Enable: 0=no, 1=yes */
	unsigned int rtt;
	unsigned int wrlvl_en = 0;	/* Write level enable: 0=no, 1=yes */
	unsigned int al = 0;		/* Posted CAS# additive latency (AL) */
	unsigned int dic = 0;		/* Output driver impedance, 40ohm */
	unsigned int dll_en = 1;	/* DLL Enable  1=Enable (Normal),
						       0=Disable (Test/Debug) */

	/* Mode Register - MR0 */
	unsigned int wr = 0;	/* Write Recovery */
	unsigned int dll_rst;	/* DLL Reset */
	unsigned int mode;	/* Normal=0 or Test=1 */
	unsigned int caslat = 4;/* CAS# latency, default set as 6 cycles */
	/* BT: Burst Type (0=Nibble Sequential, 1=Interleaved) */
	unsigned int bt;
	unsigned int bl;	/* BL: Burst Length */

	unsigned int wr_mclk;
	/* DDR4 support WR 10, 12, 14, 16, 18, 20, 24 */
	static const u8 wr_table[] = {
		0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 6, 6};
	/* DDR4 support CAS 9, 10, 11, 12, 13, 14, 15, 16, 18, 20, 22, 24 */
	static const u8 cas_latency_table[] = {
		0, 1, 2, 3, 4, 5, 6, 7, 8, 8,
		9, 9, 10, 10, 11, 11};

	if (popts->rtt_override)
		rtt = popts->rtt_override_value;
	else
		rtt = popts->cs_local_opts[0].odt_rtt_norm;

	if (additive_latency == (cas_latency - 1))
		al = 1;
	if (additive_latency == (cas_latency - 2))
		al = 2;

	if (popts->quad_rank_present)
		dic = 1;	/* output driver impedance 240/7 ohm */

	/*
	 * The esdmode value will also be used for writing
	 * MR1 during write leveling for DDR3, although the
	 * bits specifically related to the write leveling
	 * scheme will be handled automatically by the DDR
	 * controller. so we set the wrlvl_en = 0 here.
	 */
	esdmode = (0
		| ((qoff & 0x1) << 12)
		| ((tdqs_en & 0x1) << 11)
		| ((rtt & 0x7) << 8)
		| ((wrlvl_en & 0x1) << 7)
		| ((al & 0x3) << 3)
		| ((dic & 0x3) << 1)   /* DIC field is split */
		| ((dll_en & 0x1) << 0)
		);

	/*
	 * DLL control for precharge PD
	 * 0=slow exit DLL off (tXPDLL)
	 * 1=fast exit DLL on (tXP)
	 */

	wr_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
	if (wr_mclk <= 24) {
		wr = wr_table[wr_mclk - 10];
	} else {
		printf("Error: unsupported write recovery for mode register wr_mclk = %d\n",
		       wr_mclk);
	}

	dll_rst = 0;	/* dll no reset */
	mode = 0;	/* normal mode */

	/* look up table to get the cas latency bits */
	if (cas_latency >= 9 && cas_latency <= 24)
		caslat = cas_latency_table[cas_latency - 9];
	else
		printf("Error: unsupported cas latency for mode register\n");

	bt = 0;	/* Nibble sequential */

	switch (popts->burst_length) {
	case DDR_BL8:
		bl = 0;
		break;
	case DDR_OTF:
		bl = 1;
		break;
	case DDR_BC4:
		bl = 2;
		break;
	default:
		printf("Error: invalid burst length of %u specified. ",
		       popts->burst_length);
		puts("Defaulting to on-the-fly BC4 or BL8 beats.\n");
		bl = 1;
		break;
	}

	sdmode = (0
		  | ((wr & 0x7) << 9)
		  | ((dll_rst & 0x1) << 8)
		  | ((mode & 0x1) << 7)
		  | (((caslat >> 1) & 0x7) << 4)
		  | ((bt & 0x1) << 3)
		  | ((caslat & 1) << 2)
		  | ((bl & 0x3) << 0)
		  );

	ddr->ddr_sdram_mode = (0
			       | ((esdmode & 0xFFFF) << 16)
			       | ((sdmode & 0xFFFF) << 0)
			       );

	debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);

	if (unq_mrs_en) {	/* unique mode registers are supported */
		for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
			if (popts->rtt_override)
				rtt = popts->rtt_override_value;
			else
				rtt = popts->cs_local_opts[i].odt_rtt_norm;

			esdmode &= 0xF8FF;	/* clear bit 10,9,8 for rtt */
			esdmode |= (rtt & 0x7) << 8;
			switch (i) {
			case 1:
				ddr->ddr_sdram_mode_3 = (0
				       | ((esdmode & 0xFFFF) << 16)
				       | ((sdmode & 0xFFFF) << 0)
				       );
				break;
			case 2:
				ddr->ddr_sdram_mode_5 = (0
				       | ((esdmode & 0xFFFF) << 16)
				       | ((sdmode & 0xFFFF) << 0)
				       );
				break;
			case 3:
				ddr->ddr_sdram_mode_7 = (0
				       | ((esdmode & 0xFFFF) << 16)
				       | ((sdmode & 0xFFFF) << 0)
				       );
				break;
			}
		}
		debug("FSLDDR: ddr_sdram_mode_3 = 0x%08x\n",
		      ddr->ddr_sdram_mode_3);
		debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
		      ddr->ddr_sdram_mode_5);
		debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
		      ddr->ddr_sdram_mode_5);
	}
}

#elif defined(CONFIG_SYS_FSL_DDR3)
/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
			       fsl_ddr_cfg_regs_t *ddr,
			       const memctl_options_t *popts,
			       const common_timing_params_t *common_dimm,
			       unsigned int cas_latency,
			       unsigned int additive_latency,
			       const unsigned int unq_mrs_en)
{
	int i;
	unsigned short esdmode;		/* Extended SDRAM mode */
	unsigned short sdmode;		/* SDRAM mode */

	/* Mode Register - MR1 */
	unsigned int qoff = 0;		/* Output buffer enable 0=yes, 1=no */
	unsigned int tdqs_en = 0;	/* TDQS Enable: 0=no, 1=yes */
	unsigned int rtt;
	unsigned int wrlvl_en = 0;	/* Write level enable: 0=no, 1=yes */
	unsigned int al = 0;		/* Posted CAS# additive latency (AL) */
	unsigned int dic = 0;		/* Output driver impedance, 40ohm */
	unsigned int dll_en = 0;	/* DLL Enable  0=Enable (Normal),
						       1=Disable (Test/Debug) */

	/* Mode Register - MR0 */
	unsigned int dll_on;	/* DLL control for precharge PD, 0=off, 1=on */
	unsigned int wr = 0;	/* Write Recovery */
	unsigned int dll_rst;	/* DLL Reset */
	unsigned int mode;	/* Normal=0 or Test=1 */
	unsigned int caslat = 4;/* CAS# latency, default set as 6 cycles */
	/* BT: Burst Type (0=Nibble Sequential, 1=Interleaved) */
	unsigned int bt;
	unsigned int bl;	/* BL: Burst Length */

	unsigned int wr_mclk;
	/*
	 * DDR_SDRAM_MODE doesn't support 9,11,13,15
	 * Please refer JEDEC Standard No. 79-3E for Mode Register MR0
	 * for this table
	 */
	static const u8 wr_table[] = {1, 2, 3, 4, 5, 5, 6, 6, 7, 7, 0, 0};

	if (popts->rtt_override)
		rtt = popts->rtt_override_value;
	else
		rtt = popts->cs_local_opts[0].odt_rtt_norm;

	if (additive_latency == (cas_latency - 1))
		al = 1;
	if (additive_latency == (cas_latency - 2))
		al = 2;

	if (popts->quad_rank_present)
		dic = 1;	/* output driver impedance 240/7 ohm */

	/*
	 * The esdmode value will also be used for writing
	 * MR1 during write leveling for DDR3, although the
	 * bits specifically related to the write leveling
	 * scheme will be handled automatically by the DDR
	 * controller. so we set the wrlvl_en = 0 here.
	 */
	esdmode = (0
		| ((qoff & 0x1) << 12)
		| ((tdqs_en & 0x1) << 11)
		| ((rtt & 0x4) << 7)   /* rtt field is split */
		| ((wrlvl_en & 0x1) << 7)
		| ((rtt & 0x2) << 5)   /* rtt field is split */
		| ((dic & 0x2) << 4)   /* DIC field is split */
		| ((al & 0x3) << 3)
		| ((rtt & 0x1) << 2)  /* rtt field is split */
		| ((dic & 0x1) << 1)   /* DIC field is split */
		| ((dll_en & 0x1) << 0)
		);

	/*
	 * DLL control for precharge PD
	 * 0=slow exit DLL off (tXPDLL)
	 * 1=fast exit DLL on (tXP)
	 */
	dll_on = 1;

	wr_mclk = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
	if (wr_mclk <= 16) {
		wr = wr_table[wr_mclk - 5];
	} else {
		printf("Error: unsupported write recovery for mode register "
		       "wr_mclk = %d\n", wr_mclk);
	}

	dll_rst = 0;	/* dll no reset */
	mode = 0;	/* normal mode */

	/* look up table to get the cas latency bits */
	if (cas_latency >= 5 && cas_latency <= 16) {
		unsigned char cas_latency_table[] = {
			0x2,	/* 5 clocks */
			0x4,	/* 6 clocks */
			0x6,	/* 7 clocks */
			0x8,	/* 8 clocks */
			0xa,	/* 9 clocks */
			0xc,	/* 10 clocks */
			0xe,	/* 11 clocks */
			0x1,	/* 12 clocks */
			0x3,	/* 13 clocks */
			0x5,	/* 14 clocks */
			0x7,	/* 15 clocks */
			0x9,	/* 16 clocks */
		};
		caslat = cas_latency_table[cas_latency - 5];
	} else {
		printf("Error: unsupported cas latency for mode register\n");
	}

	bt = 0;	/* Nibble sequential */

	switch (popts->burst_length) {
	case DDR_BL8:
		bl = 0;
		break;
	case DDR_OTF:
		bl = 1;
		break;
	case DDR_BC4:
		bl = 2;
		break;
	default:
		printf("Error: invalid burst length of %u specified. "
			" Defaulting to on-the-fly BC4 or BL8 beats.\n",
			popts->burst_length);
		bl = 1;
		break;
	}

	sdmode = (0
		  | ((dll_on & 0x1) << 12)
		  | ((wr & 0x7) << 9)
		  | ((dll_rst & 0x1) << 8)
		  | ((mode & 0x1) << 7)
		  | (((caslat >> 1) & 0x7) << 4)
		  | ((bt & 0x1) << 3)
		  | ((caslat & 1) << 2)
		  | ((bl & 0x3) << 0)
		  );

	ddr->ddr_sdram_mode = (0
			       | ((esdmode & 0xFFFF) << 16)
			       | ((sdmode & 0xFFFF) << 0)
			       );

	debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);

	if (unq_mrs_en) {	/* unique mode registers are supported */
		for (i = 1; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
			if (popts->rtt_override)
				rtt = popts->rtt_override_value;
			else
				rtt = popts->cs_local_opts[i].odt_rtt_norm;

			esdmode &= 0xFDBB;	/* clear bit 9,6,2 */
			esdmode |= (0
				| ((rtt & 0x4) << 7)   /* rtt field is split */
				| ((rtt & 0x2) << 5)   /* rtt field is split */
				| ((rtt & 0x1) << 2)  /* rtt field is split */
				);
			switch (i) {
			case 1:
				ddr->ddr_sdram_mode_3 = (0
				       | ((esdmode & 0xFFFF) << 16)
				       | ((sdmode & 0xFFFF) << 0)
				       );
				break;
			case 2:
				ddr->ddr_sdram_mode_5 = (0
				       | ((esdmode & 0xFFFF) << 16)
				       | ((sdmode & 0xFFFF) << 0)
				       );
				break;
			case 3:
				ddr->ddr_sdram_mode_7 = (0
				       | ((esdmode & 0xFFFF) << 16)
				       | ((sdmode & 0xFFFF) << 0)
				       );
				break;
			}
		}
		debug("FSLDDR: ddr_sdram_mode_3 = 0x%08x\n",
			ddr->ddr_sdram_mode_3);
		debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
			ddr->ddr_sdram_mode_5);
		debug("FSLDDR: ddr_sdram_mode_5 = 0x%08x\n",
			ddr->ddr_sdram_mode_5);
	}
}

#else /* !CONFIG_SYS_FSL_DDR3 */

/* DDR SDRAM Mode configuration set (DDR_SDRAM_MODE) */
static void set_ddr_sdram_mode(const unsigned int ctrl_num,
			       fsl_ddr_cfg_regs_t *ddr,
			       const memctl_options_t *popts,
			       const common_timing_params_t *common_dimm,
			       unsigned int cas_latency,
			       unsigned int additive_latency,
			       const unsigned int unq_mrs_en)
{
	unsigned short esdmode;		/* Extended SDRAM mode */
	unsigned short sdmode;		/* SDRAM mode */

	/*
	 * FIXME: This ought to be pre-calculated in a
	 * technology-specific routine,
	 * e.g. compute_DDR2_mode_register(), and then the
	 * sdmode and esdmode passed in as part of common_dimm.
	 */

	/* Extended Mode Register */
	unsigned int mrs = 0;		/* Mode Register Set */
	unsigned int outputs = 0;	/* 0=Enabled, 1=Disabled */
	unsigned int rdqs_en = 0;	/* RDQS Enable: 0=no, 1=yes */
	unsigned int dqs_en = 0;	/* DQS# Enable: 0=enable, 1=disable */
	unsigned int ocd = 0;		/* 0x0=OCD not supported,
					   0x7=OCD default state */
	unsigned int rtt;
	unsigned int al;		/* Posted CAS# additive latency (AL) */
	unsigned int ods = 0;		/* Output Drive Strength:
						0 = Full strength (18ohm)
						1 = Reduced strength (4ohm) */
	unsigned int dll_en = 0;	/* DLL Enable  0=Enable (Normal),
						       1=Disable (Test/Debug) */

	/* Mode Register (MR) */
	unsigned int mr;	/* Mode Register Definition */
	unsigned int pd;	/* Power-Down Mode */
	unsigned int wr;	/* Write Recovery */
	unsigned int dll_res;	/* DLL Reset */
	unsigned int mode;	/* Normal=0 or Test=1 */
	unsigned int caslat = 0;/* CAS# latency */
	/* BT: Burst Type (0=Sequential, 1=Interleaved) */
	unsigned int bt;
	unsigned int bl;	/* BL: Burst Length */

	dqs_en = !popts->dqs_config;
	rtt = fsl_ddr_get_rtt();

	al = additive_latency;

	esdmode = (0
		| ((mrs & 0x3) << 14)
		| ((outputs & 0x1) << 12)
		| ((rdqs_en & 0x1) << 11)
		| ((dqs_en & 0x1) << 10)
		| ((ocd & 0x7) << 7)
		| ((rtt & 0x2) << 5)   /* rtt field is split */
		| ((al & 0x7) << 3)
		| ((rtt & 0x1) << 2)   /* rtt field is split */
		| ((ods & 0x1) << 1)
		| ((dll_en & 0x1) << 0)
		);

	mr = 0;		 /* FIXME: CHECKME */

	/*
	 * 0 = Fast Exit (Normal)
	 * 1 = Slow Exit (Low Power)
	 */
	pd = 0;

#if defined(CONFIG_SYS_FSL_DDR1)
	wr = 0;       /* Historical */
#elif defined(CONFIG_SYS_FSL_DDR2)
	wr = picos_to_mclk(ctrl_num, common_dimm->twr_ps);
#endif
	dll_res = 0;
	mode = 0;

#if defined(CONFIG_SYS_FSL_DDR1)
	if (1 <= cas_latency && cas_latency <= 4) {
		unsigned char mode_caslat_table[4] = {
			0x5,	/* 1.5 clocks */
			0x2,	/* 2.0 clocks */
			0x6,	/* 2.5 clocks */
			0x3	/* 3.0 clocks */
		};
		caslat = mode_caslat_table[cas_latency - 1];
	} else {
		printf("Warning: unknown cas_latency %d\n", cas_latency);
	}
#elif defined(CONFIG_SYS_FSL_DDR2)
	caslat = cas_latency;
#endif
	bt = 0;

	switch (popts->burst_length) {
	case DDR_BL4:
		bl = 2;
		break;
	case DDR_BL8:
		bl = 3;
		break;
	default:
		printf("Error: invalid burst length of %u specified. "
			" Defaulting to 4 beats.\n",
			popts->burst_length);
		bl = 2;
		break;
	}

	sdmode = (0
		  | ((mr & 0x3) << 14)
		  | ((pd & 0x1) << 12)
		  | ((wr & 0x7) << 9)
		  | ((dll_res & 0x1) << 8)
		  | ((mode & 0x1) << 7)
		  | ((caslat & 0x7) << 4)
		  | ((bt & 0x1) << 3)
		  | ((bl & 0x7) << 0)
		  );

	ddr->ddr_sdram_mode = (0
			       | ((esdmode & 0xFFFF) << 16)
			       | ((sdmode & 0xFFFF) << 0)
			       );
	debug("FSLDDR: ddr_sdram_mode = 0x%08x\n", ddr->ddr_sdram_mode);
}
#endif

/* DDR SDRAM Data Initialization (DDR_DATA_INIT) */
static void set_ddr_data_init(fsl_ddr_cfg_regs_t *ddr)
{
	unsigned int init_value;	/* Initialization value */

#ifdef CONFIG_MEM_INIT_VALUE
	init_value = CONFIG_MEM_INIT_VALUE;
#else
	init_value = 0xDEADBEEF;
#endif
	ddr->ddr_data_init = init_value;
}

/*
 * DDR SDRAM Clock Control (DDR_SDRAM_CLK_CNTL)
 * The old controller on the 8540/60 doesn't have this register.
 * Hope it's OK to set it (to 0) anyway.
 */
static void set_ddr_sdram_clk_cntl(fsl_ddr_cfg_regs_t *ddr,
					 const memctl_options_t *popts)
{
	unsigned int clk_adjust;	/* Clock adjust */
	unsigned int ss_en = 0;		/* Source synchronous enable */

#if defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
	/* Per FSL Application Note: AN2805 */
	ss_en = 1;
#endif
	clk_adjust = popts->clk_adjust;
	ddr->ddr_sdram_clk_cntl = (0
				   | ((ss_en & 0x1) << 31)
				   | ((clk_adjust & 0xF) << 23)
				   );
	debug("FSLDDR: clk_cntl = 0x%08x\n", ddr->ddr_sdram_clk_cntl);
}

/* DDR Initialization Address (DDR_INIT_ADDR) */
static void set_ddr_init_addr(fsl_ddr_cfg_regs_t *ddr)
{
	unsigned int init_addr = 0;	/* Initialization address */

	ddr->ddr_init_addr = init_addr;
}

/* DDR Initialization Address (DDR_INIT_EXT_ADDR) */
static void set_ddr_init_ext_addr(fsl_ddr_cfg_regs_t *ddr)
{
	unsigned int uia = 0;	/* Use initialization address */
	unsigned int init_ext_addr = 0;	/* Initialization address */

	ddr->ddr_init_ext_addr = (0
				  | ((uia & 0x1) << 31)
				  | (init_ext_addr & 0xF)
				  );
}

/* DDR SDRAM Timing Configuration 4 (TIMING_CFG_4) */
static void set_timing_cfg_4(fsl_ddr_cfg_regs_t *ddr,
				const memctl_options_t *popts)
{
	unsigned int rwt = 0; /* Read-to-write turnaround for same CS */
	unsigned int wrt = 0; /* Write-to-read turnaround for same CS */
	unsigned int rrt = 0; /* Read-to-read turnaround for same CS */
	unsigned int wwt = 0; /* Write-to-write turnaround for same CS */
	unsigned int trwt_mclk = 0;	/* ext_rwt */
	unsigned int dll_lock = 0; /* DDR SDRAM DLL Lock Time */

#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
	if (popts->burst_length == DDR_BL8) {
		/* We set BL/2 for fixed BL8 */
		rrt = 0;	/* BL/2 clocks */
		wwt = 0;	/* BL/2 clocks */
	} else {
		/* We need to set BL/2 + 2 to BC4 and OTF */
		rrt = 2;	/* BL/2 + 2 clocks */
		wwt = 2;	/* BL/2 + 2 clocks */
	}
#endif
#ifdef CONFIG_SYS_FSL_DDR4
	dll_lock = 2;	/* tDLLK = 1024 clocks */
#elif defined(CONFIG_SYS_FSL_DDR3)
	dll_lock = 1;	/* tDLLK = 512 clocks from spec */
#endif

	if (popts->trwt_override)
		trwt_mclk = popts->trwt;

	ddr->timing_cfg_4 = (0
			     | ((rwt & 0xf) << 28)
			     | ((wrt & 0xf) << 24)
			     | ((rrt & 0xf) << 20)
			     | ((wwt & 0xf) << 16)
			     | ((trwt_mclk & 0xc) << 12)
			     | (dll_lock & 0x3)
			     );
	debug("FSLDDR: timing_cfg_4 = 0x%08x\n", ddr->timing_cfg_4);
}

/* DDR SDRAM Timing Configuration 5 (TIMING_CFG_5) */
static void set_timing_cfg_5(fsl_ddr_cfg_regs_t *ddr, unsigned int cas_latency)
{
	unsigned int rodt_on = 0;	/* Read to ODT on */
	unsigned int rodt_off = 0;	/* Read to ODT off */
	unsigned int wodt_on = 0;	/* Write to ODT on */
	unsigned int wodt_off = 0;	/* Write to ODT off */

#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
	unsigned int wr_lat = ((ddr->timing_cfg_2 & 0x00780000) >> 19) +
			      ((ddr->timing_cfg_2 & 0x00040000) >> 14);
	/* rodt_on = timing_cfg_1[caslat] - timing_cfg_2[wrlat] + 1 */
	if (cas_latency >= wr_lat)
		rodt_on = cas_latency - wr_lat + 1;
	rodt_off = 4;	/*  4 clocks */
	wodt_on = 1;	/*  1 clocks */
	wodt_off = 4;	/*  4 clocks */
#endif

	ddr->timing_cfg_5 = (0
			     | ((rodt_on & 0x1f) << 24)
			     | ((rodt_off & 0x7) << 20)
			     | ((wodt_on & 0x1f) << 12)
			     | ((wodt_off & 0x7) << 8)
			     );
	debug("FSLDDR: timing_cfg_5 = 0x%08x\n", ddr->timing_cfg_5);
}

#ifdef CONFIG_SYS_FSL_DDR4
static void set_timing_cfg_6(fsl_ddr_cfg_regs_t *ddr)
{
	unsigned int hs_caslat = 0;
	unsigned int hs_wrlat = 0;
	unsigned int hs_wrrec = 0;
	unsigned int hs_clkadj = 0;
	unsigned int hs_wrlvl_start = 0;

	ddr->timing_cfg_6 = (0
			     | ((hs_caslat & 0x1f) << 24)
			     | ((hs_wrlat & 0x1f) << 19)
			     | ((hs_wrrec & 0x1f) << 12)
			     | ((hs_clkadj & 0x1f) << 6)
			     | ((hs_wrlvl_start & 0x1f) << 0)
			    );
	debug("FSLDDR: timing_cfg_6 = 0x%08x\n", ddr->timing_cfg_6);
}

static void set_timing_cfg_7(const unsigned int ctrl_num,
			     fsl_ddr_cfg_regs_t *ddr,
			     const common_timing_params_t *common_dimm)
{
	unsigned int txpr, tcksre, tcksrx;
	unsigned int cke_rst, cksre, cksrx, par_lat, cs_to_cmd;

	txpr = max(5U, picos_to_mclk(ctrl_num, common_dimm->trfc1_ps + 10000));
	tcksre = max(5U, picos_to_mclk(ctrl_num, 10000));
	tcksrx = max(5U, picos_to_mclk(ctrl_num, 10000));
	par_lat = 0;
	cs_to_cmd = 0;

	if (txpr <= 200)
		cke_rst = 0;
	else if (txpr <= 256)
		cke_rst = 1;
	else if (txpr <= 512)
		cke_rst = 2;
	else
		cke_rst = 3;

	if (tcksre <= 19)
		cksre = tcksre - 5;
	else
		cksre = 15;

	if (tcksrx <= 19)
		cksrx = tcksrx - 5;
	else
		cksrx = 15;

	ddr->timing_cfg_7 = (0
			     | ((cke_rst & 0x3) << 28)
			     | ((cksre & 0xf) << 24)
			     | ((cksrx & 0xf) << 20)
			     | ((par_lat & 0xf) << 16)
			     | ((cs_to_cmd & 0xf) << 4)
			    );
	debug("FSLDDR: timing_cfg_7 = 0x%08x\n", ddr->timing_cfg_7);
}

static void set_timing_cfg_8(const unsigned int ctrl_num,
			     fsl_ddr_cfg_regs_t *ddr,
			     const memctl_options_t *popts,
			     const common_timing_params_t *common_dimm,
			     unsigned int cas_latency)
{
	unsigned int rwt_bg, wrt_bg, rrt_bg, wwt_bg;
	unsigned int acttoact_bg, wrtord_bg, pre_all_rec;
	unsigned int tccdl = picos_to_mclk(ctrl_num, common_dimm->tccdl_ps);
	unsigned int wr_lat = ((ddr->timing_cfg_2 & 0x00780000) >> 19) +
			      ((ddr->timing_cfg_2 & 0x00040000) >> 14);

	rwt_bg = cas_latency + 2 + 4 - wr_lat;
	if (rwt_bg < tccdl)
		rwt_bg = tccdl - rwt_bg;
	else
		rwt_bg = 0;

	wrt_bg = wr_lat + 4 + 1 - cas_latency;
	if (wrt_bg < tccdl)
		wrt_bg = tccdl - wrt_bg;
	else
		wrt_bg = 0;

	if (popts->burst_length == DDR_BL8) {
		rrt_bg = tccdl - 4;
		wwt_bg = tccdl - 4;
	} else {
		rrt_bg = tccdl - 2;
		wwt_bg = tccdl - 2;
	}

	acttoact_bg = picos_to_mclk(ctrl_num, common_dimm->trrdl_ps);
	wrtord_bg = max(4U, picos_to_mclk(ctrl_num, 7500));
	if (popts->otf_burst_chop_en)
		wrtord_bg += 2;