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-rw-r--r--board/freescale/p3060qds/ddr.c248
1 files changed, 248 insertions, 0 deletions
diff --git a/board/freescale/p3060qds/ddr.c b/board/freescale/p3060qds/ddr.c
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+++ b/board/freescale/p3060qds/ddr.c
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+/*
+ * Copyright 2009-2011 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 <i2c.h>
+#include <hwconfig.h>
+#include <asm/mmu.h>
+#include <asm/fsl_ddr_sdram.h>
+#include <asm/fsl_ddr_dimm_params.h>
+#include <asm/fsl_law.h>
+
+#include "p3060qds.h"
+
+/*
+ * Fixed sdram init -- doesn't use serial presence detect.
+ */
+
+phys_size_t fixed_sdram(void)
+{
+ int i;
+ char buf[32];
+ fsl_ddr_cfg_regs_t ddr_cfg_regs;
+ phys_size_t ddr_size;
+ unsigned int lawbar1_target_id;
+ ulong ddr_freq, ddr_freq_mhz;
+
+ ddr_freq = get_ddr_freq(0);
+ ddr_freq_mhz = ddr_freq / 1000000;
+
+ printf("Configuring DDR for %s MT/s data rate\n",
+ strmhz(buf, ddr_freq));
+
+ for (i = 0; fixed_ddr_parm_0[i].max_freq > 0; i++) {
+ if ((ddr_freq_mhz > fixed_ddr_parm_0[i].min_freq) &&
+ (ddr_freq_mhz <= fixed_ddr_parm_0[i].max_freq)) {
+ memcpy(&ddr_cfg_regs,
+ fixed_ddr_parm_0[i].ddr_settings,
+ sizeof(ddr_cfg_regs));
+ break;
+ }
+ }
+
+ if (fixed_ddr_parm_0[i].max_freq == 0)
+ panic("Unsupported DDR data rate %s MT/s data rate\n",
+ strmhz(buf, ddr_freq));
+
+ ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
+ ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
+ fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
+
+ /*
+ * setup laws for DDR. If not interleaving, presuming half memory on
+ * DDR1 and the other half on DDR2
+ */
+ if (fixed_ddr_parm_0[i].ddr_settings->cs[0].config & 0x20000000) {
+ if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
+ ddr_size,
+ LAW_TRGT_IF_DDR_INTRLV) < 0) {
+ printf("ERROR setting Local Access Windows for DDR\n");
+ return 0;
+ }
+ } else {
+ lawbar1_target_id = LAW_TRGT_IF_DDR_1;
+ if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
+ ddr_size,
+ lawbar1_target_id) < 0) {
+ printf("ERROR setting Local Access Windows for DDR\n");
+ return 0;
+ }
+ }
+ return ddr_size;
+}
+
+struct board_specific_params {
+ u32 n_ranks;
+ u32 datarate_mhz_high;
+ u32 clk_adjust;
+ u32 wrlvl_start;
+ 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_params udimm[] = {
+ /*
+ * memory controller 0
+ * num| hi| clk| wrlvl | cpo |wrdata|2T
+ * ranks| mhz|adjst| start | |delay |
+ */
+ {4, 850, 4, 6, 0xff, 2, 0},
+ {4, 950, 5, 7, 0xff, 2, 0},
+ {4, 1050, 5, 8, 0xff, 2, 0},
+ {4, 1250, 5, 10, 0xff, 2, 0},
+ {4, 1350, 5, 11, 0xff, 2, 0},
+ {4, 1666, 5, 12, 0xff, 2, 0},
+ {2, 850, 5, 6, 0xff, 2, 0},
+ {2, 950, 5, 7, 0xff, 2, 0},
+ {2, 1250, 4, 6, 0xff, 2, 0},
+ {2, 1350, 5, 7, 0xff, 2, 0},
+ {2, 1666, 5, 8, 0xff, 2, 0},
+ {1, 850, 4, 5, 0xff, 2, 0},
+ {1, 950, 4, 7, 0xff, 2, 0},
+ {1, 1666, 4, 8, 0xff, 2, 0},
+ {}
+};
+
+static const struct board_specific_params rdimm[] = {
+ /*
+ * memory controller 0
+ * num| hi| clk| wrlvl | cpo |wrdata|2T
+ * ranks| mhz|adjst| start | |delay |
+ */
+ {4, 850, 4, 6, 0xff, 2, 0},
+ {4, 950, 5, 7, 0xff, 2, 0},
+ {4, 1050, 5, 8, 0xff, 2, 0},
+ {4, 1250, 5, 10, 0xff, 2, 0},
+ {4, 1350, 5, 11, 0xff, 2, 0},
+ {4, 1666, 5, 12, 0xff, 2, 0},
+ {2, 850, 4, 6, 0xff, 2, 0},
+ {2, 1050, 4, 7, 0xff, 2, 0},
+ {2, 1666, 4, 8, 0xff, 2, 0},
+ {1, 850, 4, 5, 0xff, 2, 0},
+ {1, 950, 4, 7, 0xff, 2, 0},
+ {1, 1666, 4, 8, 0xff, 2, 0},
+ {}
+};
+
+void fsl_ddr_board_options(memctl_options_t *popts,
+ dimm_params_t *pdimm,
+ unsigned int ctrl_num)
+{
+ const struct board_specific_params *pbsp, *pbsp_highest = NULL;
+ ulong ddr_freq;
+
+ if (ctrl_num) {
+ printf("Wrong parameter for controller number %d", ctrl_num);
+ return;
+ }
+ if (!pdimm->n_ranks)
+ return;
+
+ if (popts->registered_dimm_en)
+ pbsp = rdimm;
+ else
+ pbsp = udimm;
+
+ /* 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->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:
+
+ /*
+ * The datasheet of HMT125U7BFR8C-H9 blocks CL=7 as reservered.
+ * However SPD still claims CL=7 is supported. Extensive tests
+ * confirmed this board cannot work stably with CL=7 with this
+ * particular DIMM.
+ */
+ if (ddr_freq >= 800 && ddr_freq < 1066 && \
+ !strncmp(pdimm[0].mpart, "HMT125U7BFR8C-H9", 16)) {
+ popts->cas_latency_override = 1;
+ popts->cas_latency_override_value = 8;
+ debug("Override CL to 8\n");
+ }
+ /*
+ * 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 = 60 Ohm */
+ popts->ddr_cdr1 = DDR_CDR1_DHC_EN;
+}
+
+phys_size_t initdram(int board_type)
+{
+ phys_size_t dram_size;
+
+ puts("Initializing....");
+
+ if (fsl_use_spd()) {
+ puts("using SPD\n");
+ dram_size = fsl_ddr_sdram();
+ } else {
+ puts("using fixed parameters\n");
+ dram_size = fixed_sdram();
+ }
+
+ dram_size = setup_ddr_tlbs(dram_size / 0x100000);
+ dram_size *= 0x100000;
+
+ debug(" DDR: ");
+ return dram_size;
+}
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