drivers/ddr/fsl/fsl_ddr_gen4.c - u-boot-mtk - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2014-2015 Freescale Semiconductor, Inc.
  */

 #include <common.h>
 #include <env.h>
 #include <asm/io.h>
 #include <fsl_ddr_sdram.h>
 #include <asm/processor.h>
 #include <fsl_immap.h>
 #include <fsl_ddr.h>
 #include <fsl_errata.h>
 #if defined(CONFIG_FSL_LSCH2) || defined(CONFIG_FSL_LSCH3) || \
 	defined(CONFIG_ARM)
 #include <asm/arch/clock.h>
 #endif

 #define CTLR_INTLV_MASK	0x20000000

 #if defined(CONFIG_SYS_FSL_ERRATUM_A008511) | \
 	defined(CONFIG_SYS_FSL_ERRATUM_A009803)
 static void set_wait_for_bits_clear(void *ptr, u32 value, u32 bits)
 {
 	int timeout = 1000;

 	ddr_out32(ptr, value);

 	while (ddr_in32(ptr) & bits) {
 		udelay(100);
 		timeout--;
 	}
 	if (timeout <= 0)
 		puts("Error: wait for clear timeout.\n");
 }
 #endif

 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
 #error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
 #endif

 /*
  * regs has the to-be-set values for DDR controller registers
  * ctrl_num is the DDR controller number
  * step: 0 goes through the initialization in one pass
  *       1 sets registers and returns before enabling controller
  *       2 resumes from step 1 and continues to initialize
  * Dividing the initialization to two steps to deassert DDR reset signal
  * to comply with JEDEC specs for RDIMMs.
  */
 void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
 			     unsigned int ctrl_num, int step)
 {
 	unsigned int i, bus_width;
 	struct ccsr_ddr __iomem *ddr;
 	u32 temp32;
 	u32 total_gb_size_per_controller;
 	int timeout;
 	int mod_bnds = 0;

 #ifdef CONFIG_SYS_FSL_ERRATUM_A008511
 	u32 mr6;
 	u32 vref_seq1[3] = {0x80, 0x96, 0x16};	/* for range 1 */
 	u32 vref_seq2[3] = {0xc0, 0xf0, 0x70};	/* for range 2 */
 	u32 *vref_seq = vref_seq1;
 #endif
 #ifdef CONFIG_FSL_DDR_BIST
 	u32 mtcr, err_detect, err_sbe;
 	u32 cs0_bnds, cs1_bnds, cs2_bnds, cs3_bnds, cs0_config;
 #endif
 #ifdef CONFIG_FSL_DDR_BIST
 	char buffer[CONFIG_SYS_CBSIZE];
 #endif
 	switch (ctrl_num) {
 	case 0:
 		ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR;
 		break;
 #if defined(CONFIG_SYS_FSL_DDR2_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 1)
 	case 1:
 		ddr = (void *)CONFIG_SYS_FSL_DDR2_ADDR;
 		break;
 #endif
 #if defined(CONFIG_SYS_FSL_DDR3_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 2)
 	case 2:
 		ddr = (void *)CONFIG_SYS_FSL_DDR3_ADDR;
 		break;
 #endif
 #if defined(CONFIG_SYS_FSL_DDR4_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 3)
 	case 3:
 		ddr = (void *)CONFIG_SYS_FSL_DDR4_ADDR;
 		break;
 #endif
 	default:
 		printf("%s unexpected ctrl_num = %u\n", __func__, ctrl_num);
 		return;
 	}
 	mod_bnds = regs->cs[0].config & CTLR_INTLV_MASK;

 	if (step == 2)
 		goto step2;

 	/* Set cdr1 first in case 0.9v VDD is enabled for some SoCs*/
 	ddr_out32(&ddr->ddr_cdr1, regs->ddr_cdr1);

 	if (regs->ddr_eor)
 		ddr_out32(&ddr->eor, regs->ddr_eor);

 	ddr_out32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
 	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
 		if (i == 0) {
 			if (mod_bnds) {
 				debug("modified bnds\n");
 				ddr_out32(&ddr->cs0_bnds,
 					  (regs->cs[i].bnds & 0xfffefffe) >> 1);
 				ddr_out32(&ddr->cs0_config,
 					  (regs->cs[i].config &
 					   ~CTLR_INTLV_MASK));
 			} else {
 				ddr_out32(&ddr->cs0_bnds, regs->cs[i].bnds);
 				ddr_out32(&ddr->cs0_config, regs->cs[i].config);
 			}
 			ddr_out32(&ddr->cs0_config_2, regs->cs[i].config_2);

 		} else if (i == 1) {
 			if (mod_bnds) {
 				ddr_out32(&ddr->cs1_bnds,
 					  (regs->cs[i].bnds & 0xfffefffe) >> 1);
 			} else {
 				ddr_out32(&ddr->cs1_bnds, regs->cs[i].bnds);
 			}
 			ddr_out32(&ddr->cs1_config, regs->cs[i].config);
 			ddr_out32(&ddr->cs1_config_2, regs->cs[i].config_2);

 		} else if (i == 2) {
 			if (mod_bnds) {
 				ddr_out32(&ddr->cs2_bnds,
 					  (regs->cs[i].bnds & 0xfffefffe) >> 1);
 			} else {
 				ddr_out32(&ddr->cs2_bnds, regs->cs[i].bnds);
 			}
 			ddr_out32(&ddr->cs2_config, regs->cs[i].config);
 			ddr_out32(&ddr->cs2_config_2, regs->cs[i].config_2);

 		} else if (i == 3) {
 			if (mod_bnds) {
 				ddr_out32(&ddr->cs3_bnds,
 					  (regs->cs[i].bnds & 0xfffefffe) >> 1);
 			} else {
 				ddr_out32(&ddr->cs3_bnds, regs->cs[i].bnds);
 			}
 			ddr_out32(&ddr->cs3_config, regs->cs[i].config);
 			ddr_out32(&ddr->cs3_config_2, regs->cs[i].config_2);
 		}
 	}

 	ddr_out32(&ddr->timing_cfg_3, regs->timing_cfg_3);
 	ddr_out32(&ddr->timing_cfg_0, regs->timing_cfg_0);
 	ddr_out32(&ddr->timing_cfg_1, regs->timing_cfg_1);
 	ddr_out32(&ddr->timing_cfg_2, regs->timing_cfg_2);
 	ddr_out32(&ddr->timing_cfg_4, regs->timing_cfg_4);
 	ddr_out32(&ddr->timing_cfg_5, regs->timing_cfg_5);
 	ddr_out32(&ddr->timing_cfg_6, regs->timing_cfg_6);
 	ddr_out32(&ddr->timing_cfg_7, regs->timing_cfg_7);
 	ddr_out32(&ddr->timing_cfg_8, regs->timing_cfg_8);
 	ddr_out32(&ddr->timing_cfg_9, regs->timing_cfg_9);
 	ddr_out32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
 	ddr_out32(&ddr->dq_map_0, regs->dq_map_0);
 	ddr_out32(&ddr->dq_map_1, regs->dq_map_1);
 	ddr_out32(&ddr->dq_map_2, regs->dq_map_2);
 	ddr_out32(&ddr->dq_map_3, regs->dq_map_3);
 	ddr_out32(&ddr->sdram_cfg_3, regs->ddr_sdram_cfg_3);
 	ddr_out32(&ddr->sdram_mode, regs->ddr_sdram_mode);
 	ddr_out32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2);
 	ddr_out32(&ddr->sdram_mode_3, regs->ddr_sdram_mode_3);
 	ddr_out32(&ddr->sdram_mode_4, regs->ddr_sdram_mode_4);
 	ddr_out32(&ddr->sdram_mode_5, regs->ddr_sdram_mode_5);
 	ddr_out32(&ddr->sdram_mode_6, regs->ddr_sdram_mode_6);
 	ddr_out32(&ddr->sdram_mode_7, regs->ddr_sdram_mode_7);
 	ddr_out32(&ddr->sdram_mode_8, regs->ddr_sdram_mode_8);
 	ddr_out32(&ddr->sdram_mode_9, regs->ddr_sdram_mode_9);
 	ddr_out32(&ddr->sdram_mode_10, regs->ddr_sdram_mode_10);
 	ddr_out32(&ddr->sdram_mode_11, regs->ddr_sdram_mode_11);
 	ddr_out32(&ddr->sdram_mode_12, regs->ddr_sdram_mode_12);
 	ddr_out32(&ddr->sdram_mode_13, regs->ddr_sdram_mode_13);
 	ddr_out32(&ddr->sdram_mode_14, regs->ddr_sdram_mode_14);
 	ddr_out32(&ddr->sdram_mode_15, regs->ddr_sdram_mode_15);
 	ddr_out32(&ddr->sdram_mode_16, regs->ddr_sdram_mode_16);
 	ddr_out32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl);
 #ifdef CONFIG_SYS_FSL_ERRATUM_A009663
 	ddr_out32(&ddr->sdram_interval,
 		  regs->ddr_sdram_interval & ~SDRAM_INTERVAL_BSTOPRE);
 #else
 	ddr_out32(&ddr->sdram_interval, regs->ddr_sdram_interval);
 #endif
 	ddr_out32(&ddr->sdram_data_init, regs->ddr_data_init);
 	ddr_out32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
 #ifndef CONFIG_SYS_FSL_DDR_EMU
 	/*
 	 * Skip these two registers if running on emulator
 	 * because emulator doesn't have skew between bytes.
 	 */

 	if (regs->ddr_wrlvl_cntl_2)
 		ddr_out32(&ddr->ddr_wrlvl_cntl_2, regs->ddr_wrlvl_cntl_2);
 	if (regs->ddr_wrlvl_cntl_3)
 		ddr_out32(&ddr->ddr_wrlvl_cntl_3, regs->ddr_wrlvl_cntl_3);
 #endif

 	ddr_out32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr);
 	ddr_out32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1);
 	ddr_out32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2);
 	ddr_out32(&ddr->ddr_sdram_rcw_3, regs->ddr_sdram_rcw_3);
 	ddr_out32(&ddr->ddr_sdram_rcw_4, regs->ddr_sdram_rcw_4);
 	ddr_out32(&ddr->ddr_sdram_rcw_5, regs->ddr_sdram_rcw_5);
 	ddr_out32(&ddr->ddr_sdram_rcw_6, regs->ddr_sdram_rcw_6);
 #ifdef CONFIG_DEEP_SLEEP
 	if (is_warm_boot()) {
 		ddr_out32(&ddr->sdram_cfg_2,
 			  regs->ddr_sdram_cfg_2 & ~SDRAM_CFG2_D_INIT);
 		ddr_out32(&ddr->init_addr, CONFIG_SYS_SDRAM_BASE);
 		ddr_out32(&ddr->init_ext_addr, DDR_INIT_ADDR_EXT_UIA);

 		/* DRAM VRef will not be trained */
 		ddr_out32(&ddr->ddr_cdr2,
 			  regs->ddr_cdr2 & ~DDR_CDR2_VREF_TRAIN_EN);
 	} else
 #endif
 	{
 		ddr_out32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
 		ddr_out32(&ddr->init_addr, regs->ddr_init_addr);
 		ddr_out32(&ddr->init_ext_addr, regs->ddr_init_ext_addr);
 		ddr_out32(&ddr->ddr_cdr2, regs->ddr_cdr2);
 	}

 #ifdef CONFIG_SYS_FSL_ERRATUM_A009803
 	/* part 1 of 2 */
 	if (regs->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
 		if (regs->ddr_sdram_cfg & SDRAM_CFG_RD_EN) { /* for RDIMM */
 			ddr_out32(&ddr->ddr_sdram_rcw_2,
 				  regs->ddr_sdram_rcw_2 & ~0xf0);
 		}
 		ddr_out32(&ddr->err_disable, regs->err_disable |
 			  DDR_ERR_DISABLE_APED);
 	}
 #else
 	ddr_out32(&ddr->err_disable, regs->err_disable);
 #endif
 	ddr_out32(&ddr->err_int_en, regs->err_int_en);
 	for (i = 0; i < 64; i++) {
 		if (regs->debug[i]) {
 			debug("Write to debug_%d as %08x\n",
 			      i+1, regs->debug[i]);
 			ddr_out32(&ddr->debug[i], regs->debug[i]);
 		}
 	}

 #ifdef CONFIG_SYS_FSL_ERRATUM_A008511
 	/* Part 1 of 2 */
 	if (fsl_ddr_get_version(ctrl_num) == 0x50200) {
 		/* Disable DRAM VRef training */
 		ddr_out32(&ddr->ddr_cdr2,
 			  regs->ddr_cdr2 & ~DDR_CDR2_VREF_TRAIN_EN);
 		/* disable transmit bit deskew */
 		temp32 = ddr_in32(&ddr->debug[28]);
 		temp32 |= DDR_TX_BD_DIS;
 		ddr_out32(&ddr->debug[28], temp32);
 		ddr_out32(&ddr->debug[25], 0x9000);
 	} else if (fsl_ddr_get_version(ctrl_num) == 0x50201) {
 		/* Output enable forced off */
 		ddr_out32(&ddr->debug[37], 1 << 31);
 		/* Enable Vref training */
 		ddr_out32(&ddr->ddr_cdr2,
 			  regs->ddr_cdr2 | DDR_CDR2_VREF_TRAIN_EN);
 	} else {
 		debug("Erratum A008511 doesn't apply.\n");
 	}
 #endif

 #if defined(CONFIG_SYS_FSL_ERRATUM_A009803) || \
 	defined(CONFIG_SYS_FSL_ERRATUM_A008511)
 	/* Disable D_INIT */
 	ddr_out32(&ddr->sdram_cfg_2,
 		  regs->ddr_sdram_cfg_2 & ~SDRAM_CFG2_D_INIT);
 #endif

 #ifdef CONFIG_SYS_FSL_ERRATUM_A009801
 	temp32 = ddr_in32(&ddr->debug[25]);
 	temp32 &= ~DDR_CAS_TO_PRE_SUB_MASK;
 	temp32 |= 9 << DDR_CAS_TO_PRE_SUB_SHIFT;
 	ddr_out32(&ddr->debug[25], temp32);
 #endif

 #ifdef CONFIG_SYS_FSL_ERRATUM_A010165
 	temp32 = get_ddr_freq(ctrl_num) / 1000000;
 	if ((temp32 > 1900) && (temp32 < 2300)) {
 		temp32 = ddr_in32(&ddr->debug[28]);
 		ddr_out32(&ddr->debug[28], temp32 | 0x000a0000);
 	}
 #endif
 	/*
 	 * For RDIMMs, JEDEC spec requires clocks to be stable before reset is
 	 * deasserted. Clocks start when any chip select is enabled and clock
 	 * control register is set. Because all DDR components are connected to
 	 * one reset signal, this needs to be done in two steps. Step 1 is to
 	 * get the clocks started. Step 2 resumes after reset signal is
 	 * deasserted.
 	 */
 	if (step == 1) {
 		udelay(200);
 		return;
 	}

 step2:
 	/* Set, but do not enable the memory */
 	temp32 = regs->ddr_sdram_cfg;
 	temp32 &= ~(SDRAM_CFG_MEM_EN);
 	ddr_out32(&ddr->sdram_cfg, temp32);

 	/*
 	 * 500 painful micro-seconds must elapse between
 	 * the DDR clock setup and the DDR config enable.
 	 * DDR2 need 200 us, and DDR3 need 500 us from spec,
 	 * we choose the max, that is 500 us for all of case.
 	 */
 	udelay(500);
 	mb();
 	isb();

 #ifdef CONFIG_DEEP_SLEEP
 	if (is_warm_boot()) {
 		/* enter self-refresh */
 		temp32 = ddr_in32(&ddr->sdram_cfg_2);
 		temp32 |= SDRAM_CFG2_FRC_SR;
 		ddr_out32(&ddr->sdram_cfg_2, temp32);
 		/* do board specific memory setup */
 		board_mem_sleep_setup();

 		temp32 = (ddr_in32(&ddr->sdram_cfg) | SDRAM_CFG_BI);
 	} else
 #endif
 		temp32 = ddr_in32(&ddr->sdram_cfg) & ~SDRAM_CFG_BI;
 	/* Let the controller go */
 	ddr_out32(&ddr->sdram_cfg, temp32 | SDRAM_CFG_MEM_EN);
 	mb();
 	isb();

 #if defined(CONFIG_SYS_FSL_ERRATUM_A008511) || \
 	defined(CONFIG_SYS_FSL_ERRATUM_A009803)
 	/* Part 2 of 2 */
 	timeout = 40;
 	/* Wait for idle. D_INIT needs to be cleared earlier, or timeout */
 	while (!(ddr_in32(&ddr->debug[1]) & 0x2) &&
 	       (timeout > 0)) {
 		udelay(1000);
 		timeout--;
 	}
 	if (timeout <= 0) {
 		printf("Controler %d timeout, debug_2 = %x\n",
 		       ctrl_num, ddr_in32(&ddr->debug[1]));
 	}

 #ifdef CONFIG_SYS_FSL_ERRATUM_A008511
 	/* This erraum only applies to verion 5.2.0 */
 	if (fsl_ddr_get_version(ctrl_num) == 0x50200) {
 		/* The vref setting sequence is different for range 2 */
 		if (regs->ddr_cdr2 & DDR_CDR2_VREF_RANGE_2)
 			vref_seq = vref_seq2;

 		/* Set VREF */
 		for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
 			if (!(regs->cs[i].config & SDRAM_CS_CONFIG_EN))
 				continue;

 			mr6 = (regs->ddr_sdram_mode_10 >> 16)		|
 				 MD_CNTL_MD_EN				|
 				 MD_CNTL_CS_SEL(i)			|
 				 MD_CNTL_MD_SEL(6)			|
 				 0x00200000;
 			temp32 = mr6 | vref_seq[0];
 			set_wait_for_bits_clear(&ddr->sdram_md_cntl,
 						temp32, MD_CNTL_MD_EN);
 			udelay(1);
 			debug("MR6 = 0x%08x\n", temp32);
 			temp32 = mr6 | vref_seq[1];
 			set_wait_for_bits_clear(&ddr->sdram_md_cntl,
 						temp32, MD_CNTL_MD_EN);
 			udelay(1);
 			debug("MR6 = 0x%08x\n", temp32);
 			temp32 = mr6 | vref_seq[2];
 			set_wait_for_bits_clear(&ddr->sdram_md_cntl,
 						temp32, MD_CNTL_MD_EN);
 			udelay(1);
 			debug("MR6 = 0x%08x\n", temp32);
 		}
 		ddr_out32(&ddr->sdram_md_cntl, 0);
 		temp32 = ddr_in32(&ddr->debug[28]);
 		temp32 &= ~DDR_TX_BD_DIS; /* Enable deskew */
 		ddr_out32(&ddr->debug[28], temp32);
 		ddr_out32(&ddr->debug[1], 0x400);	/* restart deskew */
 		/* wait for idle */
 		timeout = 40;
 		while (!(ddr_in32(&ddr->debug[1]) & 0x2) &&
 		       (timeout > 0)) {
 			udelay(1000);
 			timeout--;
 		}
 		if (timeout <= 0) {
 			printf("Controler %d timeout, debug_2 = %x\n",
 			       ctrl_num, ddr_in32(&ddr->debug[1]));
 		}
 	}
 #endif /* CONFIG_SYS_FSL_ERRATUM_A008511 */

 #ifdef CONFIG_SYS_FSL_ERRATUM_A009803
 	if (regs->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
 		/* if it's RDIMM */
 		if (regs->ddr_sdram_cfg & SDRAM_CFG_RD_EN) {
 			for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
 				if (!(regs->cs[i].config & SDRAM_CS_CONFIG_EN))
 					continue;
 				set_wait_for_bits_clear(&ddr->sdram_md_cntl,
 							MD_CNTL_MD_EN |
 							MD_CNTL_CS_SEL(i) |
 							0x070000ed,
 							MD_CNTL_MD_EN);
 				udelay(1);
 			}
 		}

 		ddr_out32(&ddr->err_disable,
 			  regs->err_disable & ~DDR_ERR_DISABLE_APED);
 	}
 #endif
 	/* Restore D_INIT */
 	ddr_out32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
 #endif

 	total_gb_size_per_controller = 0;
 	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
 		if (!(regs->cs[i].config & 0x80000000))
 			continue;
 		total_gb_size_per_controller += 1 << (
 			((regs->cs[i].config >> 14) & 0x3) + 2 +
 			((regs->cs[i].config >> 8) & 0x7) + 12 +
 			((regs->cs[i].config >> 4) & 0x3) + 0 +
 			((regs->cs[i].config >> 0) & 0x7) + 8 +
 			((regs->ddr_sdram_cfg_3 >> 4) & 0x3) +
 			3 - ((regs->ddr_sdram_cfg >> 19) & 0x3) -
 			26);			/* minus 26 (count of 64M) */
 	}
 	/*
 	 * total memory / bus width = transactions needed
 	 * transactions needed / data rate = seconds
 	 * to add plenty of buffer, double the time
 	 * For example, 2GB on 666MT/s 64-bit bus takes about 402ms
 	 * Let's wait for 800ms
 	 */
 	bus_width = 3 - ((ddr_in32(&ddr->sdram_cfg) & SDRAM_CFG_DBW_MASK)
 			>> SDRAM_CFG_DBW_SHIFT);
 	timeout = ((total_gb_size_per_controller << (6 - bus_width)) * 100 /
 		(get_ddr_freq(ctrl_num) >> 20)) << 2;
 	total_gb_size_per_controller >>= 4;	/* shift down to gb size */
 	debug("total %d GB\n", total_gb_size_per_controller);
 	debug("Need to wait up to %d * 10ms\n", timeout);

 	/* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done.  */
 	while ((ddr_in32(&ddr->sdram_cfg_2) & SDRAM_CFG2_D_INIT) &&
 		(timeout >= 0)) {
 		udelay(10000);		/* throttle polling rate */
 		timeout--;
 	}

 	if (timeout <= 0)
 		printf("Waiting for D_INIT timeout. Memory may not work.\n");

 	if (mod_bnds) {
 		debug("Reset to original bnds\n");
 		ddr_out32(&ddr->cs0_bnds, regs->cs[0].bnds);
 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 1)
 		ddr_out32(&ddr->cs1_bnds, regs->cs[1].bnds);
 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 2)
 		ddr_out32(&ddr->cs2_bnds, regs->cs[2].bnds);
 #if (CONFIG_CHIP_SELECTS_PER_CTRL > 3)
 		ddr_out32(&ddr->cs3_bnds, regs->cs[3].bnds);
 #endif
 #endif
 #endif
 		ddr_out32(&ddr->cs0_config, regs->cs[0].config);
 	}

 #ifdef CONFIG_SYS_FSL_ERRATUM_A009663
 	ddr_out32(&ddr->sdram_interval, regs->ddr_sdram_interval);
 #endif

 #ifdef CONFIG_DEEP_SLEEP
 	if (is_warm_boot()) {
 		/* exit self-refresh */
 		temp32 = ddr_in32(&ddr->sdram_cfg_2);
 		temp32 &= ~SDRAM_CFG2_FRC_SR;
 		ddr_out32(&ddr->sdram_cfg_2, temp32);
 	}
 #endif

 #ifdef CONFIG_FSL_DDR_BIST
 #define BIST_PATTERN1	0xFFFFFFFF
 #define BIST_PATTERN2	0x0
 #define BIST_CR		0x80010000
 #define BIST_CR_EN	0x80000000
 #define BIST_CR_STAT	0x00000001
 	/* Perform build-in test on memory. Three-way interleaving is not yet
 	 * supported by this code. */
 	if (env_get_f("ddr_bist", buffer, CONFIG_SYS_CBSIZE) >= 0) {
 		puts("Running BIST test. This will take a while...");
 		cs0_config = ddr_in32(&ddr->cs0_config);
 		cs0_bnds = ddr_in32(&ddr->cs0_bnds);
 		cs1_bnds = ddr_in32(&ddr->cs1_bnds);
 		cs2_bnds = ddr_in32(&ddr->cs2_bnds);
 		cs3_bnds = ddr_in32(&ddr->cs3_bnds);
 		if (cs0_config & CTLR_INTLV_MASK) {
 			/* set bnds to non-interleaving */
 			ddr_out32(&ddr->cs0_bnds, (cs0_bnds & 0xfffefffe) >> 1);
 			ddr_out32(&ddr->cs1_bnds, (cs1_bnds & 0xfffefffe) >> 1);
 			ddr_out32(&ddr->cs2_bnds, (cs2_bnds & 0xfffefffe) >> 1);
 			ddr_out32(&ddr->cs3_bnds, (cs3_bnds & 0xfffefffe) >> 1);
 		}
 		ddr_out32(&ddr->mtp1, BIST_PATTERN1);
 		ddr_out32(&ddr->mtp2, BIST_PATTERN1);
 		ddr_out32(&ddr->mtp3, BIST_PATTERN2);
 		ddr_out32(&ddr->mtp4, BIST_PATTERN2);
 		ddr_out32(&ddr->mtp5, BIST_PATTERN1);
 		ddr_out32(&ddr->mtp6, BIST_PATTERN1);
 		ddr_out32(&ddr->mtp7, BIST_PATTERN2);
 		ddr_out32(&ddr->mtp8, BIST_PATTERN2);
 		ddr_out32(&ddr->mtp9, BIST_PATTERN1);
 		ddr_out32(&ddr->mtp10, BIST_PATTERN2);
 		mtcr = BIST_CR;
 		ddr_out32(&ddr->mtcr, mtcr);
 		timeout = 100;
 		while (timeout > 0 && (mtcr & BIST_CR_EN)) {
 			mdelay(1000);
 			timeout--;
 			mtcr = ddr_in32(&ddr->mtcr);
 		}
 		if (timeout <= 0)
 			puts("Timeout\n");
 		else
 			puts("Done\n");
 		err_detect = ddr_in32(&ddr->err_detect);
 		err_sbe = ddr_in32(&ddr->err_sbe);
 		if (mtcr & BIST_CR_STAT) {
 			printf("BIST test failed on controller %d.\n",
 			       ctrl_num);
 		}
 		if (err_detect || (err_sbe & 0xffff)) {
 			printf("ECC error detected on controller %d.\n",
 			       ctrl_num);
 		}

 		if (cs0_config & CTLR_INTLV_MASK) {
 			/* restore bnds registers */
 			ddr_out32(&ddr->cs0_bnds, cs0_bnds);
 			ddr_out32(&ddr->cs1_bnds, cs1_bnds);
 			ddr_out32(&ddr->cs2_bnds, cs2_bnds);
 			ddr_out32(&ddr->cs3_bnds, cs3_bnds);
 		}
 	}
 #endif
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright 2014-2015 Freescale Semiconductor, Inc.
	*/

	#include <common.h>
	#include <env.h>
	#include <asm/io.h>
	#include <fsl_ddr_sdram.h>
	#include <asm/processor.h>
	#include <fsl_immap.h>
	#include <fsl_ddr.h>
	#include <fsl_errata.h>
	#if defined(CONFIG_FSL_LSCH2) \|\| defined(CONFIG_FSL_LSCH3) \|\| \
	defined(CONFIG_ARM)
	#include <asm/arch/clock.h>
	#endif

	#define CTLR_INTLV_MASK 0x20000000

	#if defined(CONFIG_SYS_FSL_ERRATUM_A008511) \| \
	defined(CONFIG_SYS_FSL_ERRATUM_A009803)
	static void set_wait_for_bits_clear(void *ptr, u32 value, u32 bits)
	{
	int timeout = 1000;

	ddr_out32(ptr, value);

	while (ddr_in32(ptr) & bits) {
	udelay(100);
	timeout--;
	}
	if (timeout <= 0)
	puts("Error: wait for clear timeout.\n");
	}
	#endif

	#if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
	#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
	#endif

	/*
	* regs has the to-be-set values for DDR controller registers
	* ctrl_num is the DDR controller number
	* step: 0 goes through the initialization in one pass
	* 1 sets registers and returns before enabling controller
	* 2 resumes from step 1 and continues to initialize
	* Dividing the initialization to two steps to deassert DDR reset signal
	* to comply with JEDEC specs for RDIMMs.
	*/
	void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
	unsigned int ctrl_num, int step)
	{
	unsigned int i, bus_width;
	struct ccsr_ddr __iomem *ddr;
	u32 temp32;
	u32 total_gb_size_per_controller;
	int timeout;
	int mod_bnds = 0;

	#ifdef CONFIG_SYS_FSL_ERRATUM_A008511
	u32 mr6;
	u32 vref_seq1[3] = {0x80, 0x96, 0x16}; /* for range 1 */
	u32 vref_seq2[3] = {0xc0, 0xf0, 0x70}; /* for range 2 */
	u32 *vref_seq = vref_seq1;
	#endif
	#ifdef CONFIG_FSL_DDR_BIST
	u32 mtcr, err_detect, err_sbe;
	u32 cs0_bnds, cs1_bnds, cs2_bnds, cs3_bnds, cs0_config;
	#endif
	#ifdef CONFIG_FSL_DDR_BIST
	char buffer[CONFIG_SYS_CBSIZE];
	#endif
	switch (ctrl_num) {
	case 0:
	ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR;
	break;
	#if defined(CONFIG_SYS_FSL_DDR2_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 1)
	case 1:
	ddr = (void *)CONFIG_SYS_FSL_DDR2_ADDR;
	break;
	#endif
	#if defined(CONFIG_SYS_FSL_DDR3_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 2)
	case 2:
	ddr = (void *)CONFIG_SYS_FSL_DDR3_ADDR;
	break;
	#endif
	#if defined(CONFIG_SYS_FSL_DDR4_ADDR) && (CONFIG_SYS_NUM_DDR_CTLRS > 3)
	case 3:
	ddr = (void *)CONFIG_SYS_FSL_DDR4_ADDR;
	break;
	#endif
	default:
	printf("%s unexpected ctrl_num = %u\n", __func__, ctrl_num);
	return;
	}
	mod_bnds = regs->cs[0].config & CTLR_INTLV_MASK;

	if (step == 2)
	goto step2;

	/* Set cdr1 first in case 0.9v VDD is enabled for some SoCs*/
	ddr_out32(&ddr->ddr_cdr1, regs->ddr_cdr1);

	if (regs->ddr_eor)
	ddr_out32(&ddr->eor, regs->ddr_eor);

	ddr_out32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
	if (i == 0) {
	if (mod_bnds) {
	debug("modified bnds\n");
	ddr_out32(&ddr->cs0_bnds,
	(regs->cs[i].bnds & 0xfffefffe) >> 1);
	ddr_out32(&ddr->cs0_config,
	(regs->cs[i].config &
	~CTLR_INTLV_MASK));
	} else {
	ddr_out32(&ddr->cs0_bnds, regs->cs[i].bnds);
	ddr_out32(&ddr->cs0_config, regs->cs[i].config);
	}
	ddr_out32(&ddr->cs0_config_2, regs->cs[i].config_2);

	} else if (i == 1) {
	if (mod_bnds) {
	ddr_out32(&ddr->cs1_bnds,
	(regs->cs[i].bnds & 0xfffefffe) >> 1);
	} else {
	ddr_out32(&ddr->cs1_bnds, regs->cs[i].bnds);
	}
	ddr_out32(&ddr->cs1_config, regs->cs[i].config);
	ddr_out32(&ddr->cs1_config_2, regs->cs[i].config_2);

	} else if (i == 2) {
	if (mod_bnds) {
	ddr_out32(&ddr->cs2_bnds,
	(regs->cs[i].bnds & 0xfffefffe) >> 1);
	} else {
	ddr_out32(&ddr->cs2_bnds, regs->cs[i].bnds);
	}
	ddr_out32(&ddr->cs2_config, regs->cs[i].config);
	ddr_out32(&ddr->cs2_config_2, regs->cs[i].config_2);

	} else if (i == 3) {
	if (mod_bnds) {
	ddr_out32(&ddr->cs3_bnds,
	(regs->cs[i].bnds & 0xfffefffe) >> 1);
	} else {
	ddr_out32(&ddr->cs3_bnds, regs->cs[i].bnds);
	}
	ddr_out32(&ddr->cs3_config, regs->cs[i].config);
	ddr_out32(&ddr->cs3_config_2, regs->cs[i].config_2);
	}
	}

	ddr_out32(&ddr->timing_cfg_3, regs->timing_cfg_3);
	ddr_out32(&ddr->timing_cfg_0, regs->timing_cfg_0);
	ddr_out32(&ddr->timing_cfg_1, regs->timing_cfg_1);
	ddr_out32(&ddr->timing_cfg_2, regs->timing_cfg_2);
	ddr_out32(&ddr->timing_cfg_4, regs->timing_cfg_4);
	ddr_out32(&ddr->timing_cfg_5, regs->timing_cfg_5);
	ddr_out32(&ddr->timing_cfg_6, regs->timing_cfg_6);
	ddr_out32(&ddr->timing_cfg_7, regs->timing_cfg_7);
	ddr_out32(&ddr->timing_cfg_8, regs->timing_cfg_8);
	ddr_out32(&ddr->timing_cfg_9, regs->timing_cfg_9);
	ddr_out32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
	ddr_out32(&ddr->dq_map_0, regs->dq_map_0);
	ddr_out32(&ddr->dq_map_1, regs->dq_map_1);
	ddr_out32(&ddr->dq_map_2, regs->dq_map_2);
	ddr_out32(&ddr->dq_map_3, regs->dq_map_3);
	ddr_out32(&ddr->sdram_cfg_3, regs->ddr_sdram_cfg_3);
	ddr_out32(&ddr->sdram_mode, regs->ddr_sdram_mode);
	ddr_out32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2);
	ddr_out32(&ddr->sdram_mode_3, regs->ddr_sdram_mode_3);
	ddr_out32(&ddr->sdram_mode_4, regs->ddr_sdram_mode_4);
	ddr_out32(&ddr->sdram_mode_5, regs->ddr_sdram_mode_5);
	ddr_out32(&ddr->sdram_mode_6, regs->ddr_sdram_mode_6);
	ddr_out32(&ddr->sdram_mode_7, regs->ddr_sdram_mode_7);
	ddr_out32(&ddr->sdram_mode_8, regs->ddr_sdram_mode_8);
	ddr_out32(&ddr->sdram_mode_9, regs->ddr_sdram_mode_9);
	ddr_out32(&ddr->sdram_mode_10, regs->ddr_sdram_mode_10);
	ddr_out32(&ddr->sdram_mode_11, regs->ddr_sdram_mode_11);
	ddr_out32(&ddr->sdram_mode_12, regs->ddr_sdram_mode_12);
	ddr_out32(&ddr->sdram_mode_13, regs->ddr_sdram_mode_13);
	ddr_out32(&ddr->sdram_mode_14, regs->ddr_sdram_mode_14);
	ddr_out32(&ddr->sdram_mode_15, regs->ddr_sdram_mode_15);
	ddr_out32(&ddr->sdram_mode_16, regs->ddr_sdram_mode_16);
	ddr_out32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl);
	#ifdef CONFIG_SYS_FSL_ERRATUM_A009663
	ddr_out32(&ddr->sdram_interval,
	regs->ddr_sdram_interval & ~SDRAM_INTERVAL_BSTOPRE);
	#else
	ddr_out32(&ddr->sdram_interval, regs->ddr_sdram_interval);
	#endif
	ddr_out32(&ddr->sdram_data_init, regs->ddr_data_init);
	ddr_out32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
	#ifndef CONFIG_SYS_FSL_DDR_EMU
	/*
	* Skip these two registers if running on emulator
	* because emulator doesn't have skew between bytes.
	*/

	if (regs->ddr_wrlvl_cntl_2)
	ddr_out32(&ddr->ddr_wrlvl_cntl_2, regs->ddr_wrlvl_cntl_2);
	if (regs->ddr_wrlvl_cntl_3)
	ddr_out32(&ddr->ddr_wrlvl_cntl_3, regs->ddr_wrlvl_cntl_3);
	#endif

	ddr_out32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr);
	ddr_out32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1);
	ddr_out32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2);
	ddr_out32(&ddr->ddr_sdram_rcw_3, regs->ddr_sdram_rcw_3);
	ddr_out32(&ddr->ddr_sdram_rcw_4, regs->ddr_sdram_rcw_4);
	ddr_out32(&ddr->ddr_sdram_rcw_5, regs->ddr_sdram_rcw_5);
	ddr_out32(&ddr->ddr_sdram_rcw_6, regs->ddr_sdram_rcw_6);
	#ifdef CONFIG_DEEP_SLEEP
	if (is_warm_boot()) {
	ddr_out32(&ddr->sdram_cfg_2,
	regs->ddr_sdram_cfg_2 & ~SDRAM_CFG2_D_INIT);
	ddr_out32(&ddr->init_addr, CONFIG_SYS_SDRAM_BASE);
	ddr_out32(&ddr->init_ext_addr, DDR_INIT_ADDR_EXT_UIA);

	/* DRAM VRef will not be trained */
	ddr_out32(&ddr->ddr_cdr2,
	regs->ddr_cdr2 & ~DDR_CDR2_VREF_TRAIN_EN);
	} else
	#endif
	{
	ddr_out32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
	ddr_out32(&ddr->init_addr, regs->ddr_init_addr);
	ddr_out32(&ddr->init_ext_addr, regs->ddr_init_ext_addr);
	ddr_out32(&ddr->ddr_cdr2, regs->ddr_cdr2);
	}

	#ifdef CONFIG_SYS_FSL_ERRATUM_A009803
	/* part 1 of 2 */
	if (regs->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
	if (regs->ddr_sdram_cfg & SDRAM_CFG_RD_EN) { /* for RDIMM */
	ddr_out32(&ddr->ddr_sdram_rcw_2,
	regs->ddr_sdram_rcw_2 & ~0xf0);
	}
	ddr_out32(&ddr->err_disable, regs->err_disable \|
	DDR_ERR_DISABLE_APED);
	}
	#else
	ddr_out32(&ddr->err_disable, regs->err_disable);
	#endif
	ddr_out32(&ddr->err_int_en, regs->err_int_en);
	for (i = 0; i < 64; i++) {
	if (regs->debug[i]) {
	debug("Write to debug_%d as %08x\n",
	i+1, regs->debug[i]);
	ddr_out32(&ddr->debug[i], regs->debug[i]);
	}
	}

	#ifdef CONFIG_SYS_FSL_ERRATUM_A008511
	/* Part 1 of 2 */
	if (fsl_ddr_get_version(ctrl_num) == 0x50200) {
	/* Disable DRAM VRef training */
	ddr_out32(&ddr->ddr_cdr2,
	regs->ddr_cdr2 & ~DDR_CDR2_VREF_TRAIN_EN);
	/* disable transmit bit deskew */
	temp32 = ddr_in32(&ddr->debug[28]);
	temp32 \|= DDR_TX_BD_DIS;
	ddr_out32(&ddr->debug[28], temp32);
	ddr_out32(&ddr->debug[25], 0x9000);
	} else if (fsl_ddr_get_version(ctrl_num) == 0x50201) {
	/* Output enable forced off */
	ddr_out32(&ddr->debug[37], 1 << 31);
	/* Enable Vref training */
	ddr_out32(&ddr->ddr_cdr2,
	regs->ddr_cdr2 \| DDR_CDR2_VREF_TRAIN_EN);
	} else {
	debug("Erratum A008511 doesn't apply.\n");
	}
	#endif

	#if defined(CONFIG_SYS_FSL_ERRATUM_A009803) \|\| \
	defined(CONFIG_SYS_FSL_ERRATUM_A008511)
	/* Disable D_INIT */
	ddr_out32(&ddr->sdram_cfg_2,
	regs->ddr_sdram_cfg_2 & ~SDRAM_CFG2_D_INIT);
	#endif

	#ifdef CONFIG_SYS_FSL_ERRATUM_A009801
	temp32 = ddr_in32(&ddr->debug[25]);
	temp32 &= ~DDR_CAS_TO_PRE_SUB_MASK;
	temp32 \|= 9 << DDR_CAS_TO_PRE_SUB_SHIFT;
	ddr_out32(&ddr->debug[25], temp32);
	#endif

	#ifdef CONFIG_SYS_FSL_ERRATUM_A010165
	temp32 = get_ddr_freq(ctrl_num) / 1000000;
	if ((temp32 > 1900) && (temp32 < 2300)) {
	temp32 = ddr_in32(&ddr->debug[28]);
	ddr_out32(&ddr->debug[28], temp32 \| 0x000a0000);
	}
	#endif
	/*
	* For RDIMMs, JEDEC spec requires clocks to be stable before reset is
	* deasserted. Clocks start when any chip select is enabled and clock
	* control register is set. Because all DDR components are connected to
	* one reset signal, this needs to be done in two steps. Step 1 is to
	* get the clocks started. Step 2 resumes after reset signal is
	* deasserted.
	*/
	if (step == 1) {
	udelay(200);
	return;
	}

	step2:
	/* Set, but do not enable the memory */
	temp32 = regs->ddr_sdram_cfg;
	temp32 &= ~(SDRAM_CFG_MEM_EN);
	ddr_out32(&ddr->sdram_cfg, temp32);

	/*
	* 500 painful micro-seconds must elapse between
	* the DDR clock setup and the DDR config enable.
	* DDR2 need 200 us, and DDR3 need 500 us from spec,
	* we choose the max, that is 500 us for all of case.
	*/
	udelay(500);
	mb();
	isb();

	#ifdef CONFIG_DEEP_SLEEP
	if (is_warm_boot()) {
	/* enter self-refresh */
	temp32 = ddr_in32(&ddr->sdram_cfg_2);
	temp32 \|= SDRAM_CFG2_FRC_SR;
	ddr_out32(&ddr->sdram_cfg_2, temp32);
	/* do board specific memory setup */
	board_mem_sleep_setup();

	temp32 = (ddr_in32(&ddr->sdram_cfg) \| SDRAM_CFG_BI);
	} else
	#endif
	temp32 = ddr_in32(&ddr->sdram_cfg) & ~SDRAM_CFG_BI;
	/* Let the controller go */
	ddr_out32(&ddr->sdram_cfg, temp32 \| SDRAM_CFG_MEM_EN);
	mb();
	isb();

	#if defined(CONFIG_SYS_FSL_ERRATUM_A008511) \|\| \
	defined(CONFIG_SYS_FSL_ERRATUM_A009803)
	/* Part 2 of 2 */
	timeout = 40;
	/* Wait for idle. D_INIT needs to be cleared earlier, or timeout */
	while (!(ddr_in32(&ddr->debug[1]) & 0x2) &&
	(timeout > 0)) {
	udelay(1000);
	timeout--;
	}
	if (timeout <= 0) {
	printf("Controler %d timeout, debug_2 = %x\n",
	ctrl_num, ddr_in32(&ddr->debug[1]));
	}

	#ifdef CONFIG_SYS_FSL_ERRATUM_A008511
	/* This erraum only applies to verion 5.2.0 */
	if (fsl_ddr_get_version(ctrl_num) == 0x50200) {
	/* The vref setting sequence is different for range 2 */
	if (regs->ddr_cdr2 & DDR_CDR2_VREF_RANGE_2)
	vref_seq = vref_seq2;

	/* Set VREF */
	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
	if (!(regs->cs[i].config & SDRAM_CS_CONFIG_EN))
	continue;

	mr6 = (regs->ddr_sdram_mode_10 >> 16) \|
	MD_CNTL_MD_EN \|
	MD_CNTL_CS_SEL(i) \|
	MD_CNTL_MD_SEL(6) \|
	0x00200000;
	temp32 = mr6 \| vref_seq[0];
	set_wait_for_bits_clear(&ddr->sdram_md_cntl,
	temp32, MD_CNTL_MD_EN);
	udelay(1);
	debug("MR6 = 0x%08x\n", temp32);
	temp32 = mr6 \| vref_seq[1];
	set_wait_for_bits_clear(&ddr->sdram_md_cntl,
	temp32, MD_CNTL_MD_EN);
	udelay(1);
	debug("MR6 = 0x%08x\n", temp32);
	temp32 = mr6 \| vref_seq[2];
	set_wait_for_bits_clear(&ddr->sdram_md_cntl,
	temp32, MD_CNTL_MD_EN);
	udelay(1);
	debug("MR6 = 0x%08x\n", temp32);
	}
	ddr_out32(&ddr->sdram_md_cntl, 0);
	temp32 = ddr_in32(&ddr->debug[28]);
	temp32 &= ~DDR_TX_BD_DIS; /* Enable deskew */
	ddr_out32(&ddr->debug[28], temp32);
	ddr_out32(&ddr->debug[1], 0x400); /* restart deskew */
	/* wait for idle */
	timeout = 40;
	while (!(ddr_in32(&ddr->debug[1]) & 0x2) &&
	(timeout > 0)) {
	udelay(1000);
	timeout--;
	}
	if (timeout <= 0) {
	printf("Controler %d timeout, debug_2 = %x\n",
	ctrl_num, ddr_in32(&ddr->debug[1]));
	}
	}
	#endif /* CONFIG_SYS_FSL_ERRATUM_A008511 */

	#ifdef CONFIG_SYS_FSL_ERRATUM_A009803
	if (regs->ddr_sdram_cfg_2 & SDRAM_CFG2_AP_EN) {
	/* if it's RDIMM */
	if (regs->ddr_sdram_cfg & SDRAM_CFG_RD_EN) {
	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
	if (!(regs->cs[i].config & SDRAM_CS_CONFIG_EN))
	continue;
	set_wait_for_bits_clear(&ddr->sdram_md_cntl,
	MD_CNTL_MD_EN \|
	MD_CNTL_CS_SEL(i) \|
	0x070000ed,
	MD_CNTL_MD_EN);
	udelay(1);
	}
	}

	ddr_out32(&ddr->err_disable,
	regs->err_disable & ~DDR_ERR_DISABLE_APED);
	}
	#endif
	/* Restore D_INIT */
	ddr_out32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
	#endif

	total_gb_size_per_controller = 0;
	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
	if (!(regs->cs[i].config & 0x80000000))
	continue;
	total_gb_size_per_controller += 1 << (
	((regs->cs[i].config >> 14) & 0x3) + 2 +
	((regs->cs[i].config >> 8) & 0x7) + 12 +
	((regs->cs[i].config >> 4) & 0x3) + 0 +
	((regs->cs[i].config >> 0) & 0x7) + 8 +
	((regs->ddr_sdram_cfg_3 >> 4) & 0x3) +
	3 - ((regs->ddr_sdram_cfg >> 19) & 0x3) -
	26); /* minus 26 (count of 64M) */
	}
	/*
	* total memory / bus width = transactions needed
	* transactions needed / data rate = seconds
	* to add plenty of buffer, double the time
	* For example, 2GB on 666MT/s 64-bit bus takes about 402ms
	* Let's wait for 800ms
	*/
	bus_width = 3 - ((ddr_in32(&ddr->sdram_cfg) & SDRAM_CFG_DBW_MASK)
	>> SDRAM_CFG_DBW_SHIFT);
	timeout = ((total_gb_size_per_controller << (6 - bus_width)) * 100 /
	(get_ddr_freq(ctrl_num) >> 20)) << 2;
	total_gb_size_per_controller >>= 4; /* shift down to gb size */
	debug("total %d GB\n", total_gb_size_per_controller);
	debug("Need to wait up to %d * 10ms\n", timeout);

	/* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done. */
	while ((ddr_in32(&ddr->sdram_cfg_2) & SDRAM_CFG2_D_INIT) &&
	(timeout >= 0)) {
	udelay(10000); /* throttle polling rate */
	timeout--;
	}

	if (timeout <= 0)
	printf("Waiting for D_INIT timeout. Memory may not work.\n");

	if (mod_bnds) {
	debug("Reset to original bnds\n");
	ddr_out32(&ddr->cs0_bnds, regs->cs[0].bnds);
	#if (CONFIG_CHIP_SELECTS_PER_CTRL > 1)
	ddr_out32(&ddr->cs1_bnds, regs->cs[1].bnds);
	#if (CONFIG_CHIP_SELECTS_PER_CTRL > 2)
	ddr_out32(&ddr->cs2_bnds, regs->cs[2].bnds);
	#if (CONFIG_CHIP_SELECTS_PER_CTRL > 3)
	ddr_out32(&ddr->cs3_bnds, regs->cs[3].bnds);
	#endif
	#endif
	#endif
	ddr_out32(&ddr->cs0_config, regs->cs[0].config);
	}

	#ifdef CONFIG_SYS_FSL_ERRATUM_A009663
	ddr_out32(&ddr->sdram_interval, regs->ddr_sdram_interval);
	#endif

	#ifdef CONFIG_DEEP_SLEEP
	if (is_warm_boot()) {
	/* exit self-refresh */
	temp32 = ddr_in32(&ddr->sdram_cfg_2);
	temp32 &= ~SDRAM_CFG2_FRC_SR;
	ddr_out32(&ddr->sdram_cfg_2, temp32);
	}
	#endif

	#ifdef CONFIG_FSL_DDR_BIST
	#define BIST_PATTERN1 0xFFFFFFFF
	#define BIST_PATTERN2 0x0
	#define BIST_CR 0x80010000
	#define BIST_CR_EN 0x80000000
	#define BIST_CR_STAT 0x00000001
	/* Perform build-in test on memory. Three-way interleaving is not yet
	* supported by this code. */
	if (env_get_f("ddr_bist", buffer, CONFIG_SYS_CBSIZE) >= 0) {
	puts("Running BIST test. This will take a while...");
	cs0_config = ddr_in32(&ddr->cs0_config);
	cs0_bnds = ddr_in32(&ddr->cs0_bnds);
	cs1_bnds = ddr_in32(&ddr->cs1_bnds);
	cs2_bnds = ddr_in32(&ddr->cs2_bnds);
	cs3_bnds = ddr_in32(&ddr->cs3_bnds);
	if (cs0_config & CTLR_INTLV_MASK) {
	/* set bnds to non-interleaving */
	ddr_out32(&ddr->cs0_bnds, (cs0_bnds & 0xfffefffe) >> 1);
	ddr_out32(&ddr->cs1_bnds, (cs1_bnds & 0xfffefffe) >> 1);
	ddr_out32(&ddr->cs2_bnds, (cs2_bnds & 0xfffefffe) >> 1);
	ddr_out32(&ddr->cs3_bnds, (cs3_bnds & 0xfffefffe) >> 1);
	}
	ddr_out32(&ddr->mtp1, BIST_PATTERN1);
	ddr_out32(&ddr->mtp2, BIST_PATTERN1);
	ddr_out32(&ddr->mtp3, BIST_PATTERN2);
	ddr_out32(&ddr->mtp4, BIST_PATTERN2);
	ddr_out32(&ddr->mtp5, BIST_PATTERN1);
	ddr_out32(&ddr->mtp6, BIST_PATTERN1);
	ddr_out32(&ddr->mtp7, BIST_PATTERN2);
	ddr_out32(&ddr->mtp8, BIST_PATTERN2);
	ddr_out32(&ddr->mtp9, BIST_PATTERN1);
	ddr_out32(&ddr->mtp10, BIST_PATTERN2);
	mtcr = BIST_CR;
	ddr_out32(&ddr->mtcr, mtcr);
	timeout = 100;
	while (timeout > 0 && (mtcr & BIST_CR_EN)) {
	mdelay(1000);
	timeout--;
	mtcr = ddr_in32(&ddr->mtcr);
	}
	if (timeout <= 0)
	puts("Timeout\n");
	else
	puts("Done\n");
	err_detect = ddr_in32(&ddr->err_detect);
	err_sbe = ddr_in32(&ddr->err_sbe);
	if (mtcr & BIST_CR_STAT) {
	printf("BIST test failed on controller %d.\n",
	ctrl_num);
	}
	if (err_detect \|\| (err_sbe & 0xffff)) {
	printf("ECC error detected on controller %d.\n",
	ctrl_num);
	}

	if (cs0_config & CTLR_INTLV_MASK) {
	/* restore bnds registers */
	ddr_out32(&ddr->cs0_bnds, cs0_bnds);
	ddr_out32(&ddr->cs1_bnds, cs1_bnds);
	ddr_out32(&ddr->cs2_bnds, cs2_bnds);
	ddr_out32(&ddr->cs3_bnds, cs3_bnds);
	}
	}
	#endif
	}