/*
 * Copyright 2010-2011 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/mmu.h>
#include <asm/immap_85xx.h>
#include <asm/processor.h>
#include <asm/fsl_ddr_sdram.h>
#include <asm/fsl_ddr_dimm_params.h>
#include <asm/io.h>
#include <asm/fsl_law.h>

#ifdef CONFIG_DDR_RAW_TIMING
#if	defined(CONFIG_P1020RDB_PROTO) || \
	defined(CONFIG_P1021RDB) || \
	defined(CONFIG_P1020UTM)
/* Micron MT41J256M8_187E */
dimm_params_t ddr_raw_timing = {
	.n_ranks = 1,
	.rank_density = 1073741824u,
	.capacity = 1073741824u,
	.primary_sdram_width = 32,
	.ec_sdram_width = 0,
	.registered_dimm = 0,
	.mirrored_dimm = 0,
	.n_row_addr = 15,
	.n_col_addr = 10,
	.n_banks_per_sdram_device = 8,
	.edc_config = 0,
	.burst_lengths_bitmask = 0x0c,

	.tCKmin_X_ps = 1870,
	.caslat_X = 0x1e << 4,	/* 5,6,7,8 */
	.tAA_ps = 13125,
	.tWR_ps = 15000,
	.tRCD_ps = 13125,
	.tRRD_ps = 7500,
	.tRP_ps = 13125,
	.tRAS_ps = 37500,
	.tRC_ps = 50625,
	.tRFC_ps = 160000,
	.tWTR_ps = 7500,
	.tRTP_ps = 7500,
	.refresh_rate_ps = 7800000,
	.tFAW_ps = 37500,
};
#elif defined(CONFIG_P2020RDB)
/* Micron MT41J128M16_15E */
dimm_params_t ddr_raw_timing = {
	.n_ranks = 1,
	.rank_density = 1073741824u,
	.capacity = 1073741824u,
	.primary_sdram_width = 64,
	.ec_sdram_width = 0,
	.registered_dimm = 0,
	.mirrored_dimm = 0,
	.n_row_addr = 14,
	.n_col_addr = 10,
	.n_banks_per_sdram_device = 8,
	.edc_config = 0,
	.burst_lengths_bitmask = 0x0c,

	.tCKmin_X_ps = 1500,
	.caslat_X = 0x7e << 4,	/* 5,6,7,8,9,10 */
	.tAA_ps = 13500,
	.tWR_ps = 15000,
	.tRCD_ps = 13500,
	.tRRD_ps = 6000,
	.tRP_ps = 13500,
	.tRAS_ps = 36000,
	.tRC_ps = 49500,
	.tRFC_ps = 160000,
	.tWTR_ps = 7500,
	.tRTP_ps = 7500,
	.refresh_rate_ps = 7800000,
	.tFAW_ps = 30000,
};
#elif defined(CONFIG_P1020MBG)
/* Micron MT41J512M8_187E */
dimm_params_t ddr_raw_timing = {
	.n_ranks = 2,
	.rank_density = 1073741824u,
	.capacity = 2147483648u,
	.primary_sdram_width = 32,
	.ec_sdram_width = 0,
	.registered_dimm = 0,
	.mirrored_dimm = 0,
	.n_row_addr = 15,
	.n_col_addr = 10,
	.n_banks_per_sdram_device = 8,
	.edc_config = 0,
	.burst_lengths_bitmask = 0x0c,

	.tCKmin_X_ps = 1870,
	.caslat_X = 0x1e << 4,	/* 5,6,7,8 */
	.tAA_ps = 13125,
	.tWR_ps = 15000,
	.tRCD_ps = 13125,
	.tRRD_ps = 7500,
	.tRP_ps = 13125,
	.tRAS_ps = 37500,
	.tRC_ps = 50625,
	.tRFC_ps = 160000,
	.tWTR_ps = 7500,
	.tRTP_ps = 7500,
	.refresh_rate_ps = 7800000,
	.tFAW_ps = 37500,
};
#elif defined(CONFIG_P1020RDB)
/*
 * Samsung K4B2G0846C-HCF8
 * The following timing are for "downshift"
 * i.e. to use CL9 part as CL7
 * otherwise, tAA, tRCD, tRP will be 13500ps
 * and tRC will be 49500ps
 */
dimm_params_t ddr_raw_timing = {
	.n_ranks = 1,
	.rank_density = 1073741824u,
	.capacity = 1073741824u,
	.primary_sdram_width = 32,
	.ec_sdram_width = 0,
	.registered_dimm = 0,
	.mirrored_dimm = 0,
	.n_row_addr = 15,
	.n_col_addr = 10,
	.n_banks_per_sdram_device = 8,
	.edc_config = 0,
	.burst_lengths_bitmask = 0x0c,

	.tCKmin_X_ps = 1875,
	.caslat_X = 0x1e << 4,	/* 5,6,7,8 */
	.tAA_ps = 13125,
	.tWR_ps = 15000,
	.tRCD_ps = 13125,
	.tRRD_ps = 7500,
	.tRP_ps = 13125,
	.tRAS_ps = 37500,
	.tRC_ps = 50625,
	.tRFC_ps = 160000,
	.tWTR_ps = 7500,
	.tRTP_ps = 7500,
	.refresh_rate_ps = 7800000,
	.tFAW_ps = 37500,
};
#elif	defined(CONFIG_P1024RDB) || \
	defined(CONFIG_P1025RDB)
/*
 * Samsung K4B2G0846C-HCH9
 * The following timing are for "downshift"
 * i.e. to use CL9 part as CL7
 * otherwise, tAA, tRCD, tRP will be 13500ps
 * and tRC will be 49500ps
 */
dimm_params_t ddr_raw_timing = {
	.n_ranks = 1,
	.rank_density = 1073741824u,
	.capacity = 1073741824u,
	.primary_sdram_width = 32,
	.ec_sdram_width = 0,
	.registered_dimm = 0,
	.mirrored_dimm = 0,
	.n_row_addr = 15,
	.n_col_addr = 10,
	.n_banks_per_sdram_device = 8,
	.edc_config = 0,
	.burst_lengths_bitmask = 0x0c,

	.tCKmin_X_ps = 1500,
	.caslat_X = 0x3e << 4,	/* 5,6,7,8,9 */
	.tAA_ps = 13125,
	.tWR_ps = 15000,
	.tRCD_ps = 13125,
	.tRRD_ps = 6000,
	.tRP_ps = 13125,
	.tRAS_ps = 36000,
	.tRC_ps = 49125,
	.tRFC_ps = 160000,
	.tWTR_ps = 7500,
	.tRTP_ps = 7500,
	.refresh_rate_ps = 7800000,
	.tFAW_ps = 30000,
};
#else
#error Missing raw timing data for this board
#endif

int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
		unsigned int controller_number,
		unsigned int dimm_number)
{
	const char dimm_model[] = "Fixed DDR on board";

	if ((controller_number == 0) && (dimm_number == 0)) {
		memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t));
		memset(pdimm->mpart, 0, sizeof(pdimm->mpart));
		memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1);
	}

	return 0;
}
#endif /* CONFIG_DDR_RAW_TIMING */

/* Fixed sdram init -- doesn't use serial presence detect. */
phys_size_t fixed_sdram(void)
{
	sys_info_t sysinfo;
	char buf[32];
	size_t ddr_size;
	fsl_ddr_cfg_regs_t ddr_cfg_regs = {
		.cs[0].bnds = CONFIG_SYS_DDR_CS0_BNDS,
		.cs[0].config = CONFIG_SYS_DDR_CS0_CONFIG,
		.cs[0].config_2 = CONFIG_SYS_DDR_CS0_CONFIG_2,
#if CONFIG_CHIP_SELECTS_PER_CTRL > 1
		.cs[1].bnds = CONFIG_SYS_DDR_CS1_BNDS,
		.cs[1].config = CONFIG_SYS_DDR_CS1_CONFIG,
		.cs[1].config_2 = CONFIG_SYS_DDR_CS1_CONFIG_2,
#endif
		.timing_cfg_3 = CONFIG_SYS_DDR_TIMING_3,
		.timing_cfg_0 = CONFIG_SYS_DDR_TIMING_0,
		.timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1,
		.timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2,
		.ddr_sdram_cfg = CONFIG_SYS_DDR_CONTROL,
		.ddr_sdram_cfg_2 = CONFIG_SYS_DDR_CONTROL_2,
		.ddr_sdram_mode = CONFIG_SYS_DDR_MODE_1,
		.ddr_sdram_mode_2 = CONFIG_SYS_DDR_MODE_2,
		.ddr_sdram_md_cntl = CONFIG_SYS_DDR_MODE_CONTROL,
		.ddr_sdram_interval = CONFIG_SYS_DDR_INTERVAL,
		.ddr_data_init = CONFIG_SYS_DDR_DATA_INIT,
		.ddr_sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CTRL,
		.ddr_init_addr = CONFIG_SYS_DDR_INIT_ADDR,
		.ddr_init_ext_addr = CONFIG_SYS_DDR_INIT_EXT_ADDR,
		.timing_cfg_4 = CONFIG_SYS_DDR_TIMING_4,
		.timing_cfg_5 = CONFIG_SYS_DDR_TIMING_5,
		.ddr_zq_cntl = CONFIG_SYS_DDR_ZQ_CONTROL,
		.ddr_wrlvl_cntl = CONFIG_SYS_DDR_WRLVL_CONTROL,
		.ddr_sr_cntr = CONFIG_SYS_DDR_SR_CNTR,
		.ddr_sdram_rcw_1 = CONFIG_SYS_DDR_RCW_1,
		.ddr_sdram_rcw_2 = CONFIG_SYS_DDR_RCW_2
	};

	get_sys_info(&sysinfo);
	printf("Configuring DDR for %s MT/s data rate\n",
			strmhz(buf, sysinfo.freqDDRBus));

	ddr_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;

	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);

	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
				ddr_size, LAW_TRGT_IF_DDR_1) < 0) {
		printf("ERROR setting Local Access Windows for DDR\n");
		return 0;
	};

	return ddr_size;
}

void fsl_ddr_board_options(memctl_options_t *popts,
				dimm_params_t *pdimm,
				unsigned int ctrl_num)
{
	int i;
	popts->clk_adjust = 6;
	popts->cpo_override = 0x1f;
	popts->write_data_delay = 2;
	popts->half_strength_driver_enable = 1;
	/* Write leveling override */
	popts->wrlvl_en = 1;
	popts->wrlvl_override = 1;
	popts->wrlvl_sample = 0xf;
	popts->wrlvl_start = 0x8;
	popts->trwt_override = 1;
	popts->trwt = 0;

	if (pdimm->primary_sdram_width == 64)
		popts->data_bus_width = 0;
	else if (pdimm->primary_sdram_width == 32)
		popts->data_bus_width = 1;
	else
		printf("Error in DDR bus width configuration!\n");

	for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
		popts->cs_local_opts[i].odt_rd_cfg = FSL_DDR_ODT_NEVER;
		popts->cs_local_opts[i].odt_wr_cfg = FSL_DDR_ODT_CS;
	}
}