avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/freescale/b4860qds/ddr.c

@@ -0,0 +1,261 @@
+/*
+ * Copyright 2011-2012 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <hwconfig.h>
+#include <fsl_ddr.h>
+#include <asm/mmu.h>
+#include <fsl_ddr_sdram.h>
+#include <fsl_ddr_dimm_params.h>
+#include <asm/fsl_law.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+dimm_params_t ddr_raw_timing = {
+	.n_ranks = 2,
+	.rank_density = 2147483648u,
+	.capacity = 4294967296u,
+	.primary_sdram_width = 64,
+	.ec_sdram_width = 8,
+	.registered_dimm = 0,
+	.mirrored_dimm = 1,
+	.n_row_addr = 15,
+	.n_col_addr = 10,
+	.n_banks_per_sdram_device = 8,
+	.edc_config = 2,	/* ECC */
+	.burst_lengths_bitmask = 0x0c,
+
+	.tckmin_x_ps = 1071,
+	.caslat_x = 0x2fe << 4,	/* 5,6,7,8,9,10,11,13 */
+	.taa_ps = 13910,
+	.twr_ps = 15000,
+	.trcd_ps = 13910,
+	.trrd_ps = 6000,
+	.trp_ps = 13910,
+	.tras_ps = 34000,
+	.trc_ps = 48910,
+	.trfc_ps = 260000,
+	.twtr_ps = 7500,
+	.trtp_ps = 7500,
+	.refresh_rate_ps = 7800000,
+	.tfaw_ps = 35000,
+};
+
+int fsl_ddr_get_dimm_params(dimm_params_t *pdimm,
+		unsigned int controller_number,
+		unsigned int dimm_number)
+{
+	const char dimm_model[] = "RAW timing DDR";
+
+	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;
+}
+
+struct board_specific_parameters {
+	u32 n_ranks;
+	u32 datarate_mhz_high;
+	u32 clk_adjust;
+	u32 wrlvl_start;
+	u32 wrlvl_ctl_2;
+	u32 wrlvl_ctl_3;
+	u32 cpo;
+	u32 write_data_delay;
+	u32 force_2t;
+};
+
+/*
+ * This table contains all valid speeds we want to override with board
+ * specific parameters. datarate_mhz_high values need to be in ascending order
+ * for each n_ranks group.
+ */
+static const struct board_specific_parameters udimm0[] = {
+	/*
+	 * memory controller 0
+	 *   num|  hi|  clk| wrlvl |   wrlvl   |  wrlvl | cpo  |wrdata|2T
+	 * ranks| mhz|adjst| start |   ctl2    |  ctl3  |      |delay |
+	 */
+	{2,  1350,    4,     7, 0x09080807, 0x07060607,   0xff,    2,  0},
+	{2,  1666,    4,     7, 0x09080806, 0x06050607,   0xff,    2,  0},
+	{2,  1900,    3,     7, 0x08070706, 0x06040507,   0xff,    2,  0},
+	{1,  1350,    4,     7, 0x09080807, 0x07060607,   0xff,    2,  0},
+	{1,  1700,    4,     7, 0x09080806, 0x06050607,   0xff,    2,  0},
+	{1,  1900,    3,     7, 0x08070706, 0x06040507,   0xff,    2,  0},
+	{}
+};
+
+static const struct board_specific_parameters *udimms[] = {
+	udimm0,
+};
+
+void fsl_ddr_board_options(memctl_options_t *popts,
+				dimm_params_t *pdimm,
+				unsigned int ctrl_num)
+{
+	const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
+	ulong ddr_freq;
+
+	if (ctrl_num > 2) {
+		printf("Not supported controller number %d\n", ctrl_num);
+		return;
+	}
+	if (!pdimm->n_ranks)
+		return;
+
+	pbsp = udimms[0];
+
+
+	/* Get clk_adjust, cpo, write_data_delay,2T, according to the board ddr
+	 * freqency and n_banks specified in board_specific_parameters table.
+	 */
+	ddr_freq = get_ddr_freq(0) / 1000000;
+	while (pbsp->datarate_mhz_high) {
+		if (pbsp->n_ranks == pdimm->n_ranks) {
+			if (ddr_freq <= pbsp->datarate_mhz_high) {
+				popts->cpo_override = pbsp->cpo;
+				popts->write_data_delay =
+					pbsp->write_data_delay;
+				popts->clk_adjust = pbsp->clk_adjust;
+				popts->wrlvl_start = pbsp->wrlvl_start;
+				popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
+				popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
+				popts->twot_en = pbsp->force_2t;
+				goto found;
+			}
+			pbsp_highest = pbsp;
+		}
+		pbsp++;
+	}
+
+	if (pbsp_highest) {
+		printf("Error: board specific timing not found "
+			"for data rate %lu MT/s\n"
+			"Trying to use the highest speed (%u) parameters\n",
+			ddr_freq, pbsp_highest->datarate_mhz_high);
+		popts->cpo_override = pbsp_highest->cpo;
+		popts->write_data_delay = pbsp_highest->write_data_delay;
+		popts->clk_adjust = pbsp_highest->clk_adjust;
+		popts->wrlvl_start = pbsp_highest->wrlvl_start;
+		popts->twot_en = pbsp_highest->force_2t;
+	} else {
+		panic("DIMM is not supported by this board");
+	}
+found:
+	/*
+	 * Factors to consider for half-strength driver enable:
+	 *	- number of DIMMs installed
+	 */
+	popts->half_strength_driver_enable = 0;
+	/*
+	 * Write leveling override
+	 */
+	popts->wrlvl_override = 1;
+	popts->wrlvl_sample = 0xf;
+
+	/*
+	 * Rtt and Rtt_WR override
+	 */
+	popts->rtt_override = 0;
+
+	/* Enable ZQ calibration */
+	popts->zq_en = 1;
+
+	/* DHC_EN =1, ODT = 75 Ohm */
+	popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
+	popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
+}
+
+phys_size_t initdram(int board_type)
+{
+	phys_size_t dram_size;
+
+#if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL)
+	puts("Initializing....using SPD\n");
+	dram_size = fsl_ddr_sdram();
+#else
+	dram_size =  fsl_ddr_sdram_size();
+#endif
+	dram_size = setup_ddr_tlbs(dram_size / 0x100000);
+	dram_size *= 0x100000;
+
+	return dram_size;
+}
+
+unsigned long long step_assign_addresses(fsl_ddr_info_t *pinfo,
+			  unsigned int dbw_cap_adj[])
+{
+	int i, j;
+	unsigned long long total_mem, current_mem_base, total_ctlr_mem;
+	unsigned long long rank_density, ctlr_density = 0;
+
+	current_mem_base = 0ull;
+	total_mem = 0;
+	/*
+	 * This board has soldered DDR chips. DDRC1 has two rank.
+	 * DDRC2 has only one rank.
+	 * Assigning DDRC2 to lower address and DDRC1 to higher address.
+	 */
+	if (pinfo->memctl_opts[0].memctl_interleaving) {
+		rank_density = pinfo->dimm_params[0][0].rank_density >>
+					dbw_cap_adj[0];
+		ctlr_density = rank_density;
+
+		debug("rank density is 0x%llx, ctlr density is 0x%llx\n",
+		      rank_density, ctlr_density);
+		for (i = CONFIG_NUM_DDR_CONTROLLERS - 1; i >= 0; i--) {
+			switch (pinfo->memctl_opts[i].memctl_interleaving_mode) {
+			case FSL_DDR_CACHE_LINE_INTERLEAVING:
+			case FSL_DDR_PAGE_INTERLEAVING:
+			case FSL_DDR_BANK_INTERLEAVING:
+			case FSL_DDR_SUPERBANK_INTERLEAVING:
+				total_ctlr_mem = 2 * ctlr_density;
+				break;
+			default:
+				panic("Unknown interleaving mode");
+			}
+			pinfo->common_timing_params[i].base_address =
+						current_mem_base;
+			pinfo->common_timing_params[i].total_mem =
+						total_ctlr_mem;
+			total_mem = current_mem_base + total_ctlr_mem;
+			debug("ctrl %d base 0x%llx\n", i, current_mem_base);
+			debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
+		}
+	} else {
+		/*
+		 * Simple linear assignment if memory
+		 * controllers are not interleaved.
+		 */
+		for (i = CONFIG_NUM_DDR_CONTROLLERS - 1; i >= 0; i--) {
+			total_ctlr_mem = 0;
+			pinfo->common_timing_params[i].base_address =
+						current_mem_base;
+			for (j = 0; j < CONFIG_DIMM_SLOTS_PER_CTLR; j++) {
+				/* Compute DIMM base addresses. */
+				unsigned long long cap =
+					pinfo->dimm_params[i][j].capacity;
+				pinfo->dimm_params[i][j].base_address =
+					current_mem_base;
+				debug("ctrl %d dimm %d base 0x%llx\n",
+				      i, j, current_mem_base);
+				current_mem_base += cap;
+				total_ctlr_mem += cap;
+			}
+			debug("ctrl %d total 0x%llx\n", i, total_ctlr_mem);
+			pinfo->common_timing_params[i].total_mem =
+							total_ctlr_mem;
+			total_mem += total_ctlr_mem;
+		}
+	}
+	debug("Total mem by %s is 0x%llx\n", __func__, total_mem);
+
+	return total_mem;
+}