arch/powerpc/cpu/mpc85xx/ddr-gen3.c

/*
 * Copyright 2008-2011 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 <asm/io.h>
#include <asm/fsl_ddr_sdram.h>
#include <asm/processor.h>

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

void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
			     unsigned int ctrl_num)
{
	unsigned int i;
	volatile ccsr_ddr_t *ddr;
	u32 temp_sdram_cfg;

	switch (ctrl_num) {
	case 0:
		ddr = (void *)CONFIG_SYS_MPC85xx_DDR_ADDR;
		break;
	case 1:
		ddr = (void *)CONFIG_SYS_MPC85xx_DDR2_ADDR;
		break;
	default:
		printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
		return;
	}

	out_be32(&ddr->eor, regs->ddr_eor);

	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
		if (i == 0) {
			out_be32(&ddr->cs0_bnds, regs->cs[i].bnds);
			out_be32(&ddr->cs0_config, regs->cs[i].config);
			out_be32(&ddr->cs0_config_2, regs->cs[i].config_2);

		} else if (i == 1) {
			out_be32(&ddr->cs1_bnds, regs->cs[i].bnds);
			out_be32(&ddr->cs1_config, regs->cs[i].config);
			out_be32(&ddr->cs1_config_2, regs->cs[i].config_2);

		} else if (i == 2) {
			out_be32(&ddr->cs2_bnds, regs->cs[i].bnds);
			out_be32(&ddr->cs2_config, regs->cs[i].config);
			out_be32(&ddr->cs2_config_2, regs->cs[i].config_2);

		} else if (i == 3) {
			out_be32(&ddr->cs3_bnds, regs->cs[i].bnds);
			out_be32(&ddr->cs3_config, regs->cs[i].config);
			out_be32(&ddr->cs3_config_2, regs->cs[i].config_2);
		}
	}

	out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3);
	out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0);
	out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1);
	out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
	out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
	out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode);
	out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2);
	out_be32(&ddr->sdram_mode_3, regs->ddr_sdram_mode_3);
	out_be32(&ddr->sdram_mode_4, regs->ddr_sdram_mode_4);
	out_be32(&ddr->sdram_mode_5, regs->ddr_sdram_mode_5);
	out_be32(&ddr->sdram_mode_6, regs->ddr_sdram_mode_6);
	out_be32(&ddr->sdram_mode_7, regs->ddr_sdram_mode_7);
	out_be32(&ddr->sdram_mode_8, regs->ddr_sdram_mode_8);
	out_be32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl);
	out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
	out_be32(&ddr->sdram_data_init, regs->ddr_data_init);
	out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
	out_be32(&ddr->init_addr, regs->ddr_init_addr);
	out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr);

	out_be32(&ddr->timing_cfg_4, regs->timing_cfg_4);
	out_be32(&ddr->timing_cfg_5, regs->timing_cfg_5);
	out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
	out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
	out_be32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr);
	out_be32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1);
	out_be32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2);
	out_be32(&ddr->ddr_cdr1, regs->ddr_cdr1);
	out_be32(&ddr->ddr_cdr2, regs->ddr_cdr2);
	out_be32(&ddr->err_disable, regs->err_disable);
	out_be32(&ddr->err_int_en, regs->err_int_en);
	for (i = 0; i < 32; i++)
		out_be32(&ddr->debug[i], regs->debug[i]);

	/* Set, but do not enable the memory */
	temp_sdram_cfg = regs->ddr_sdram_cfg;
	temp_sdram_cfg &= ~(SDRAM_CFG_MEM_EN);
	out_be32(&ddr->sdram_cfg, temp_sdram_cfg);
#ifdef CONFIG_SYS_FSL_ERRATUM_DDR_A003
	if (regs->ddr_sdram_rcw_2 & 0x00f00000) {
		out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2 & 0xf07fffff);
		out_be32(&ddr->debug[2], 0x00000400);
		out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl & 0x7fffffff);
		out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl & 0x7fffffff);
		out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2 & 0xffffffeb);
		out_be32(&ddr->mtcr, 0);
		out_be32(&ddr->debug[12], 0x00000015);
		out_be32(&ddr->debug[21], 0x24000000);
		out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval & 0xffff);
		out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_BI | SDRAM_CFG_MEM_EN);

		asm volatile("sync;isync");
		while (!(in_be32(&ddr->debug[1]) & 0x2))
			;

		switch (regs->ddr_sdram_rcw_2 & 0x00f00000) {
		case 0x00000000:
			out_be32(&ddr->sdram_md_cntl,
				MD_CNTL_MD_EN		|
				MD_CNTL_CS_SEL_CS0_CS1	|
				0x04000000		|
				MD_CNTL_WRCW		|
				MD_CNTL_MD_VALUE(0x02));
			break;
		case 0x00100000:
			out_be32(&ddr->sdram_md_cntl,
				MD_CNTL_MD_EN		|
				MD_CNTL_CS_SEL_CS0_CS1	|
				0x04000000		|
				MD_CNTL_WRCW		|
				MD_CNTL_MD_VALUE(0x0a));
			break;
		case 0x00200000:
			out_be32(&ddr->sdram_md_cntl,
				MD_CNTL_MD_EN		|
				MD_CNTL_CS_SEL_CS0_CS1	|
				0x04000000		|
				MD_CNTL_WRCW		|
				MD_CNTL_MD_VALUE(0x12));
			break;
		case 0x00300000:
			out_be32(&ddr->sdram_md_cntl,
				MD_CNTL_MD_EN		|
				MD_CNTL_CS_SEL_CS0_CS1	|
				0x04000000		|
				MD_CNTL_WRCW		|
				MD_CNTL_MD_VALUE(0x1a));
			break;
		default:
			out_be32(&ddr->sdram_md_cntl,
				MD_CNTL_MD_EN		|
				MD_CNTL_CS_SEL_CS0_CS1	|
				0x04000000		|
				MD_CNTL_WRCW		|
				MD_CNTL_MD_VALUE(0x02));
			printf("Unsupported RC10\n");
			break;
		}

		while (in_be32(&ddr->sdram_md_cntl) & 0x80000000)
			;
		udelay(6);
		out_be32(&ddr->sdram_cfg, temp_sdram_cfg);
		out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
		out_be32(&ddr->debug[2], 0x0);
		out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl);
		out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl);
		out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2);
		out_be32(&ddr->debug[12], 0x0);
		out_be32(&ddr->debug[21], 0x0);
		out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);

	}
#endif
	/*
	 * For 8572 DDR1 erratum - DDR controller may enter illegal state
	 * when operatiing in 32-bit bus mode with 4-beat bursts,
	 * This erratum does not affect DDR3 mode, only for DDR2 mode.
	 */
#ifdef CONFIG_MPC8572
	if ((((in_be32(&ddr->sdram_cfg) >> 24) & 0x7) == SDRAM_TYPE_DDR2)
	    && in_be32(&ddr->sdram_cfg) & 0x80000) {
		/* set DEBUG_1[31] */
		setbits_be32(&ddr->debug[0], 1);
	}
#endif

	/*
	 * 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);
	asm volatile("sync;isync");

	/* Let the controller go */
	temp_sdram_cfg = in_be32(&ddr->sdram_cfg) & ~SDRAM_CFG_BI;
	out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_MEM_EN);
	asm volatile("sync;isync");
	while (!(in_be32(&ddr->debug[1]) & 0x2))
		;

	/* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done.  */
	while (in_be32(&ddr->sdram_cfg_2) & 0x10) {
		udelay(10000);		/* throttle polling rate */
	}
}