arch/arm/cpu/armv7/am33xx/ddr.c - github/trini/u-boot - Gitiles

 /*
  * DDR Configuration for AM33xx devices.
  *
  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <asm/arch/cpu.h>
 #include <asm/arch/ddr_defs.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/io.h>
 #include <asm/emif.h>

 /**
  * Base address for EMIF instances
  */
 static struct emif_reg_struct *emif_reg[2] = {
 				(struct emif_reg_struct *)EMIF4_0_CFG_BASE,
 				(struct emif_reg_struct *)EMIF4_1_CFG_BASE};

 /**
  * Base addresses for DDR PHY cmd/data regs
  */
 static struct ddr_cmd_regs *ddr_cmd_reg[2] = {
 				(struct ddr_cmd_regs *)DDR_PHY_CMD_ADDR,
 				(struct ddr_cmd_regs *)DDR_PHY_CMD_ADDR2};

 static struct ddr_data_regs *ddr_data_reg[2] = {
 				(struct ddr_data_regs *)DDR_PHY_DATA_ADDR,
 				(struct ddr_data_regs *)DDR_PHY_DATA_ADDR2};

 /**
  * Base address for ddr io control instances
  */
 static struct ddr_cmdtctrl *ioctrl_reg = {
 			(struct ddr_cmdtctrl *)DDR_CONTROL_BASE_ADDR};

 static inline u32 get_mr(int nr, u32 cs, u32 mr_addr)
 {
 	u32 mr;

 	mr_addr |= cs << EMIF_REG_CS_SHIFT;
 	writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg);

 	mr = readl(&emif_reg[nr]->emif_lpddr2_mode_reg_data);
 	debug("get_mr: EMIF1 cs %d mr %08x val 0x%x\n", cs, mr_addr, mr);
 	if (((mr & 0x0000ff00) >>  8) == (mr & 0xff) &&
 	    ((mr & 0x00ff0000) >> 16) == (mr & 0xff) &&
 	    ((mr & 0xff000000) >> 24) == (mr & 0xff))
 		return mr & 0xff;
 	else
 		return mr;
 }

 static inline void set_mr(int nr, u32 cs, u32 mr_addr, u32 mr_val)
 {
 	mr_addr |= cs << EMIF_REG_CS_SHIFT;
 	writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg);
 	writel(mr_val, &emif_reg[nr]->emif_lpddr2_mode_reg_data);
 }

 static void configure_mr(int nr, u32 cs)
 {
 	u32 mr_addr;

 	while (get_mr(nr, cs, LPDDR2_MR0) & LPDDR2_MR0_DAI_MASK)
 		;
 	set_mr(nr, cs, LPDDR2_MR10, 0x56);

 	set_mr(nr, cs, LPDDR2_MR1, 0x43);
 	set_mr(nr, cs, LPDDR2_MR2, 0x2);

 	mr_addr = LPDDR2_MR2 | EMIF_REG_REFRESH_EN_MASK;
 	set_mr(nr, cs, mr_addr, 0x2);
 }

 /*
  * Configure EMIF4D5 registers and MR registers For details about these magic
  * values please see the EMIF registers section of the TRM.
  */
 void config_sdram_emif4d5(const struct emif_regs *regs, int nr)
 {
 	writel(0xA0, &emif_reg[nr]->emif_pwr_mgmt_ctrl);
 	writel(0xA0, &emif_reg[nr]->emif_pwr_mgmt_ctrl_shdw);
 	writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);

 	writel(regs->temp_alert_config, &emif_reg[nr]->emif_temp_alert_config);
 	writel(regs->emif_rd_wr_lvl_rmp_win,
 	       &emif_reg[nr]->emif_rd_wr_lvl_rmp_win);
 	writel(regs->emif_rd_wr_lvl_rmp_ctl,
 	       &emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl);
 	writel(regs->emif_rd_wr_lvl_ctl, &emif_reg[nr]->emif_rd_wr_lvl_ctl);
 	writel(regs->emif_rd_wr_exec_thresh,
 	       &emif_reg[nr]->emif_rd_wr_exec_thresh);

 	/*
 	 * for most SOCs these registers won't need to be changed so only
 	 * write to these registers if someone explicitly has set the
 	 * register's value.
 	 */
 	if(regs->emif_cos_config) {
 		writel(regs->emif_prio_class_serv_map, &emif_reg[nr]->emif_prio_class_serv_map);
 		writel(regs->emif_connect_id_serv_1_map, &emif_reg[nr]->emif_connect_id_serv_1_map);
 		writel(regs->emif_connect_id_serv_2_map, &emif_reg[nr]->emif_connect_id_serv_2_map);
 		writel(regs->emif_cos_config, &emif_reg[nr]->emif_cos_config);
 	}

 	/*
 	 * Sequence to ensure that the PHY is in a known state prior to
 	 * startting hardware leveling.  Also acts as to latch some state from
 	 * the EMIF into the PHY.
 	 */
 	writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
 	writel(0x2411, &emif_reg[nr]->emif_iodft_tlgc);
 	writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);

 	clrbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
 			EMIF_REG_INITREF_DIS_MASK);

 	writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
 	writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
 	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
 	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);

 	/* Perform hardware leveling. */
 	udelay(1000);
 	writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36) |
 	       0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
 	writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw) |
 	       0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw);

 	writel(0x80000000, &emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl);

 	/* Enable read leveling */
 	writel(0x80000000, &emif_reg[nr]->emif_rd_wr_lvl_ctl);

 	/*
 	 * Enable full read and write leveling.  Wait for read and write
 	 * leveling bit to clear RDWRLVLFULL_START bit 31
 	 */
 	while((readl(&emif_reg[nr]->emif_rd_wr_lvl_ctl) & 0x80000000) != 0)
 		;

 	/* Check the timeout register to see if leveling is complete */
 	if((readl(&emif_reg[nr]->emif_status) & 0x70) != 0)
 		puts("DDR3 H/W leveling incomplete with errors\n");

 	if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2) {
 		configure_mr(nr, 0);
 		configure_mr(nr, 1);
 	}
 }

 /**
  * Configure SDRAM
  */
 void config_sdram(const struct emif_regs *regs, int nr)
 {
 	if (regs->zq_config) {
 		writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);
 		writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
 		writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
 		writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
 		writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
 	}
 	writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
 	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
 	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
 }

 /**
  * Set SDRAM timings
  */
 void set_sdram_timings(const struct emif_regs *regs, int nr)
 {
 	writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1);
 	writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1_shdw);
 	writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2);
 	writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2_shdw);
 	writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3);
 	writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3_shdw);
 }

 /*
  * Configure EXT PHY registers for hardware leveling
  */
 static void ext_phy_settings(const struct emif_regs *regs, int nr)
 {
 	/*
 	 * Enable hardware leveling on the EMIF.  For details about these
 	 * magic values please see the EMIF registers section of the TRM.
 	 */
 	writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1);
 	writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22_shdw);
 	writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23);
 	writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23_shdw);
 	writel(0x40010080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_24);
 	writel(0x40010080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_24_shdw);
 	writel(0x08102040, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_25);
 	writel(0x08102040, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_25_shdw);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_26);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_26_shdw);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_27);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_27_shdw);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_28);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_28_shdw);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_29);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_29_shdw);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_30);
 	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_30_shdw);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_31);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_31_shdw);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_32);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_32_shdw);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_33);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_33_shdw);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_34);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_34_shdw);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_35);
 	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_35_shdw);
 	writel(0x000000FF, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
 	writel(0x000000FF, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw);

 	/*
 	 * Sequence to ensure that the PHY is again in a known state after
 	 * hardware leveling.
 	 */
 	writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
 	writel(0x2411, &emif_reg[nr]->emif_iodft_tlgc);
 	writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
 }

 /**
  * Configure DDR PHY
  */
 void config_ddr_phy(const struct emif_regs *regs, int nr)
 {
 	/*
 	 * Disable initialization and refreshes for now until we
 	 * finish programming EMIF regs.
 	 * Also set time between rising edge of DDR_RESET to rising
 	 * edge of DDR_CKE to > 500us per memory spec.
 	 */
 #ifndef CONFIG_AM43XX
 	setbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
 		     EMIF_REG_INITREF_DIS_MASK);
 #endif
 	if (regs->zq_config)
 		writel(0x80003100, &emif_reg[nr]->emif_sdram_ref_ctrl);

 	writel(regs->emif_ddr_phy_ctlr_1,
 		&emif_reg[nr]->emif_ddr_phy_ctrl_1);
 	writel(regs->emif_ddr_phy_ctlr_1,
 		&emif_reg[nr]->emif_ddr_phy_ctrl_1_shdw);

 	if (get_emif_rev((u32)emif_reg[nr]) == EMIF_4D5)
 		ext_phy_settings(regs, nr);
 }

 /**
  * Configure DDR CMD control registers
  */
 void config_cmd_ctrl(const struct cmd_control *cmd, int nr)
 {
 	if (!cmd)
 		return;

 	writel(cmd->cmd0csratio, &ddr_cmd_reg[nr]->cm0csratio);
 	writel(cmd->cmd0iclkout, &ddr_cmd_reg[nr]->cm0iclkout);

 	writel(cmd->cmd1csratio, &ddr_cmd_reg[nr]->cm1csratio);
 	writel(cmd->cmd1iclkout, &ddr_cmd_reg[nr]->cm1iclkout);

 	writel(cmd->cmd2csratio, &ddr_cmd_reg[nr]->cm2csratio);
 	writel(cmd->cmd2iclkout, &ddr_cmd_reg[nr]->cm2iclkout);
 }

 /**
  * Configure DDR DATA registers
  */
 void config_ddr_data(const struct ddr_data *data, int nr)
 {
 	int i;

 	if (!data)
 		return;

 	for (i = 0; i < DDR_DATA_REGS_NR; i++) {
 		writel(data->datardsratio0,
 			&(ddr_data_reg[nr]+i)->dt0rdsratio0);
 		writel(data->datawdsratio0,
 			&(ddr_data_reg[nr]+i)->dt0wdsratio0);
 		writel(data->datawiratio0,
 			&(ddr_data_reg[nr]+i)->dt0wiratio0);
 		writel(data->datagiratio0,
 			&(ddr_data_reg[nr]+i)->dt0giratio0);
 		writel(data->datafwsratio0,
 			&(ddr_data_reg[nr]+i)->dt0fwsratio0);
 		writel(data->datawrsratio0,
 			&(ddr_data_reg[nr]+i)->dt0wrsratio0);
 	}
 }

 void config_io_ctrl(const struct ctrl_ioregs *ioregs)
 {
 	if (!ioregs)
 		return;

 	writel(ioregs->cm0ioctl, &ioctrl_reg->cm0ioctl);
 	writel(ioregs->cm1ioctl, &ioctrl_reg->cm1ioctl);
 	writel(ioregs->cm2ioctl, &ioctrl_reg->cm2ioctl);
 	writel(ioregs->dt0ioctl, &ioctrl_reg->dt0ioctl);
 	writel(ioregs->dt1ioctl, &ioctrl_reg->dt1ioctl);
 #ifdef CONFIG_AM43XX
 	writel(ioregs->dt2ioctrl, &ioctrl_reg->dt2ioctrl);
 	writel(ioregs->dt3ioctrl, &ioctrl_reg->dt3ioctrl);
 	writel(ioregs->emif_sdram_config_ext,
 	       &ioctrl_reg->emif_sdram_config_ext);
 #endif
 }
	/*
	* DDR Configuration for AM33xx devices.
	*
	* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <asm/arch/cpu.h>
	#include <asm/arch/ddr_defs.h>
	#include <asm/arch/sys_proto.h>
	#include <asm/io.h>
	#include <asm/emif.h>

	/**
	* Base address for EMIF instances
	*/
	static struct emif_reg_struct *emif_reg[2] = {
	(struct emif_reg_struct *)EMIF4_0_CFG_BASE,
	(struct emif_reg_struct *)EMIF4_1_CFG_BASE};

	/**
	* Base addresses for DDR PHY cmd/data regs
	*/
	static struct ddr_cmd_regs *ddr_cmd_reg[2] = {
	(struct ddr_cmd_regs *)DDR_PHY_CMD_ADDR,
	(struct ddr_cmd_regs *)DDR_PHY_CMD_ADDR2};

	static struct ddr_data_regs *ddr_data_reg[2] = {
	(struct ddr_data_regs *)DDR_PHY_DATA_ADDR,
	(struct ddr_data_regs *)DDR_PHY_DATA_ADDR2};

	/**
	* Base address for ddr io control instances
	*/
	static struct ddr_cmdtctrl *ioctrl_reg = {
	(struct ddr_cmdtctrl *)DDR_CONTROL_BASE_ADDR};

	static inline u32 get_mr(int nr, u32 cs, u32 mr_addr)
	{
	u32 mr;

	mr_addr \|= cs << EMIF_REG_CS_SHIFT;
	writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg);

	mr = readl(&emif_reg[nr]->emif_lpddr2_mode_reg_data);
	debug("get_mr: EMIF1 cs %d mr %08x val 0x%x\n", cs, mr_addr, mr);
	if (((mr & 0x0000ff00) >> 8) == (mr & 0xff) &&
	((mr & 0x00ff0000) >> 16) == (mr & 0xff) &&
	((mr & 0xff000000) >> 24) == (mr & 0xff))
	return mr & 0xff;
	else
	return mr;
	}

	static inline void set_mr(int nr, u32 cs, u32 mr_addr, u32 mr_val)
	{
	mr_addr \|= cs << EMIF_REG_CS_SHIFT;
	writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg);
	writel(mr_val, &emif_reg[nr]->emif_lpddr2_mode_reg_data);
	}

	static void configure_mr(int nr, u32 cs)
	{
	u32 mr_addr;

	while (get_mr(nr, cs, LPDDR2_MR0) & LPDDR2_MR0_DAI_MASK)
	;
	set_mr(nr, cs, LPDDR2_MR10, 0x56);

	set_mr(nr, cs, LPDDR2_MR1, 0x43);
	set_mr(nr, cs, LPDDR2_MR2, 0x2);

	mr_addr = LPDDR2_MR2 \| EMIF_REG_REFRESH_EN_MASK;
	set_mr(nr, cs, mr_addr, 0x2);
	}

	/*
	* Configure EMIF4D5 registers and MR registers For details about these magic
	* values please see the EMIF registers section of the TRM.
	*/
	void config_sdram_emif4d5(const struct emif_regs *regs, int nr)
	{
	writel(0xA0, &emif_reg[nr]->emif_pwr_mgmt_ctrl);
	writel(0xA0, &emif_reg[nr]->emif_pwr_mgmt_ctrl_shdw);
	writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);

	writel(regs->temp_alert_config, &emif_reg[nr]->emif_temp_alert_config);
	writel(regs->emif_rd_wr_lvl_rmp_win,
	&emif_reg[nr]->emif_rd_wr_lvl_rmp_win);
	writel(regs->emif_rd_wr_lvl_rmp_ctl,
	&emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl);
	writel(regs->emif_rd_wr_lvl_ctl, &emif_reg[nr]->emif_rd_wr_lvl_ctl);
	writel(regs->emif_rd_wr_exec_thresh,
	&emif_reg[nr]->emif_rd_wr_exec_thresh);

	/*
	* for most SOCs these registers won't need to be changed so only
	* write to these registers if someone explicitly has set the
	* register's value.
	*/
	if(regs->emif_cos_config) {
	writel(regs->emif_prio_class_serv_map, &emif_reg[nr]->emif_prio_class_serv_map);
	writel(regs->emif_connect_id_serv_1_map, &emif_reg[nr]->emif_connect_id_serv_1_map);
	writel(regs->emif_connect_id_serv_2_map, &emif_reg[nr]->emif_connect_id_serv_2_map);
	writel(regs->emif_cos_config, &emif_reg[nr]->emif_cos_config);
	}

	/*
	* Sequence to ensure that the PHY is in a known state prior to
	* startting hardware leveling. Also acts as to latch some state from
	* the EMIF into the PHY.
	*/
	writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
	writel(0x2411, &emif_reg[nr]->emif_iodft_tlgc);
	writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);

	clrbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
	EMIF_REG_INITREF_DIS_MASK);

	writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
	writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);

	/* Perform hardware leveling. */
	udelay(1000);
	writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36) \|
	0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
	writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw) \|
	0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw);

	writel(0x80000000, &emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl);

	/* Enable read leveling */
	writel(0x80000000, &emif_reg[nr]->emif_rd_wr_lvl_ctl);

	/*
	* Enable full read and write leveling. Wait for read and write
	* leveling bit to clear RDWRLVLFULL_START bit 31
	*/
	while((readl(&emif_reg[nr]->emif_rd_wr_lvl_ctl) & 0x80000000) != 0)
	;

	/* Check the timeout register to see if leveling is complete */
	if((readl(&emif_reg[nr]->emif_status) & 0x70) != 0)
	puts("DDR3 H/W leveling incomplete with errors\n");

	if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2) {
	configure_mr(nr, 0);
	configure_mr(nr, 1);
	}
	}

	/**
	* Configure SDRAM
	*/
	void config_sdram(const struct emif_regs *regs, int nr)
	{
	if (regs->zq_config) {
	writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);
	writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
	writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
	}
	writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
	writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
	}

	/**
	* Set SDRAM timings
	*/
	void set_sdram_timings(const struct emif_regs *regs, int nr)
	{
	writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1);
	writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1_shdw);
	writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2);
	writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2_shdw);
	writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3);
	writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3_shdw);
	}

	/*
	* Configure EXT PHY registers for hardware leveling
	*/
	static void ext_phy_settings(const struct emif_regs *regs, int nr)
	{
	/*
	* Enable hardware leveling on the EMIF. For details about these
	* magic values please see the EMIF registers section of the TRM.
	*/
	writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1);
	writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22_shdw);
	writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23);
	writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23_shdw);
	writel(0x40010080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_24);
	writel(0x40010080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_24_shdw);
	writel(0x08102040, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_25);
	writel(0x08102040, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_25_shdw);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_26);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_26_shdw);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_27);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_27_shdw);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_28);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_28_shdw);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_29);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_29_shdw);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_30);
	writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_30_shdw);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_31);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_31_shdw);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_32);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_32_shdw);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_33);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_33_shdw);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_34);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_34_shdw);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_35);
	writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_35_shdw);
	writel(0x000000FF, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
	writel(0x000000FF, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw);

	/*
	* Sequence to ensure that the PHY is again in a known state after
	* hardware leveling.
	*/
	writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
	writel(0x2411, &emif_reg[nr]->emif_iodft_tlgc);
	writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
	}

	/**
	* Configure DDR PHY
	*/
	void config_ddr_phy(const struct emif_regs *regs, int nr)
	{
	/*
	* Disable initialization and refreshes for now until we
	* finish programming EMIF regs.
	* Also set time between rising edge of DDR_RESET to rising
	* edge of DDR_CKE to > 500us per memory spec.
	*/
	#ifndef CONFIG_AM43XX
	setbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
	EMIF_REG_INITREF_DIS_MASK);
	#endif
	if (regs->zq_config)
	writel(0x80003100, &emif_reg[nr]->emif_sdram_ref_ctrl);

	writel(regs->emif_ddr_phy_ctlr_1,
	&emif_reg[nr]->emif_ddr_phy_ctrl_1);
	writel(regs->emif_ddr_phy_ctlr_1,
	&emif_reg[nr]->emif_ddr_phy_ctrl_1_shdw);

	if (get_emif_rev((u32)emif_reg[nr]) == EMIF_4D5)
	ext_phy_settings(regs, nr);
	}

	/**
	* Configure DDR CMD control registers
	*/
	void config_cmd_ctrl(const struct cmd_control *cmd, int nr)
	{
	if (!cmd)
	return;

	writel(cmd->cmd0csratio, &ddr_cmd_reg[nr]->cm0csratio);
	writel(cmd->cmd0iclkout, &ddr_cmd_reg[nr]->cm0iclkout);

	writel(cmd->cmd1csratio, &ddr_cmd_reg[nr]->cm1csratio);
	writel(cmd->cmd1iclkout, &ddr_cmd_reg[nr]->cm1iclkout);

	writel(cmd->cmd2csratio, &ddr_cmd_reg[nr]->cm2csratio);
	writel(cmd->cmd2iclkout, &ddr_cmd_reg[nr]->cm2iclkout);
	}

	/**
	* Configure DDR DATA registers
	*/
	void config_ddr_data(const struct ddr_data *data, int nr)
	{
	int i;

	if (!data)
	return;

	for (i = 0; i < DDR_DATA_REGS_NR; i++) {
	writel(data->datardsratio0,
	&(ddr_data_reg[nr]+i)->dt0rdsratio0);
	writel(data->datawdsratio0,
	&(ddr_data_reg[nr]+i)->dt0wdsratio0);
	writel(data->datawiratio0,
	&(ddr_data_reg[nr]+i)->dt0wiratio0);
	writel(data->datagiratio0,
	&(ddr_data_reg[nr]+i)->dt0giratio0);
	writel(data->datafwsratio0,
	&(ddr_data_reg[nr]+i)->dt0fwsratio0);
	writel(data->datawrsratio0,
	&(ddr_data_reg[nr]+i)->dt0wrsratio0);
	}
	}

	void config_io_ctrl(const struct ctrl_ioregs *ioregs)
	{
	if (!ioregs)
	return;

	writel(ioregs->cm0ioctl, &ioctrl_reg->cm0ioctl);
	writel(ioregs->cm1ioctl, &ioctrl_reg->cm1ioctl);
	writel(ioregs->cm2ioctl, &ioctrl_reg->cm2ioctl);
	writel(ioregs->dt0ioctl, &ioctrl_reg->dt0ioctl);
	writel(ioregs->dt1ioctl, &ioctrl_reg->dt1ioctl);
	#ifdef CONFIG_AM43XX
	writel(ioregs->dt2ioctrl, &ioctrl_reg->dt2ioctrl);
	writel(ioregs->dt3ioctrl, &ioctrl_reg->dt3ioctrl);
	writel(ioregs->emif_sdram_config_ext,
	&ioctrl_reg->emif_sdram_config_ext);
	#endif
	}