ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/uboot/board/freescale/p2020ds/ddr.c b/marvell/uboot/board/freescale/p2020ds/ddr.c
new file mode 100644
index 0000000..debe70b
--- /dev/null
+++ b/marvell/uboot/board/freescale/p2020ds/ddr.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2008-2009 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 <fsl_ddr_sdram.h>
+#include <fsl_ddr_dimm_params.h>
+
+struct board_specific_parameters {
+ u32 n_ranks;
+ u32 datarate_mhz_high;
+ u32 clk_adjust;
+ 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.
+ *
+ * ranges for parameters:
+ * wr_data_delay = 0-6
+ * clk adjust = 0-8
+ * cpo 2-0x1E (30)
+ */
+static const struct board_specific_parameters dimm0[] = {
+ /*
+ * memory controller 0
+ * num| hi| clk| cpo|wrdata|2T
+ * ranks| mhz|adjst| | delay|
+ */
+#ifdef CONFIG_SYS_FSL_DDR2
+ {2, 549, 4, 0x1f, 2, 0},
+ {2, 680, 4, 0x1f, 3, 0},
+ {2, 850, 4, 0x1f, 4, 0},
+ {1, 549, 4, 0x1f, 2, 0},
+ {1, 680, 4, 0x1f, 3, 0},
+ {1, 850, 4, 0x1f, 4, 0},
+#else
+ {2, 850, 6, 0x1f, 4, 0},
+ {1, 850, 4, 0x1f, 4, 0},
+#endif
+ {}
+};
+
+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;
+ int i;
+
+ if (ctrl_num) {
+ printf("Wrong parameter for controller number %d", ctrl_num);
+ return;
+ }
+ if (!pdimm->n_ranks)
+ return;
+
+ /*
+ * set odt_rd_cfg and odt_wr_cfg. If the there is only one dimm in
+ * that controller, set odt_wr_cfg to 4 for CS0, and 0 to CS1. If
+ * there are two dimms in the controller, set odt_rd_cfg to 3 and
+ * odt_wr_cfg to 3 for the even CS, 0 for the odd CS.
+ */
+ for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
+ popts->cs_local_opts[i].odt_rd_cfg = 0;
+ popts->cs_local_opts[i].odt_wr_cfg = 1;
+ }
+
+ pbsp = dimm0;
+
+ /* 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->clk_adjust = pbsp->clk_adjust;
+ popts->cpo_override = pbsp->cpo;
+ popts->write_data_delay =
+ pbsp->write_data_delay;
+ 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->clk_adjust = pbsp_highest->clk_adjust;
+ popts->cpo_override = pbsp_highest->cpo;
+ popts->write_data_delay = pbsp_highest->write_data_delay;
+ 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;
+ popts->wrlvl_en = 1;
+ /* Write leveling override */
+ popts->wrlvl_override = 1;
+ popts->wrlvl_sample = 0xa;
+ popts->wrlvl_start = 0x8;
+ /* Rtt and Rtt_WR override */
+ popts->rtt_override = 1;
+ popts->rtt_override_value = DDR3_RTT_120_OHM;
+ popts->rtt_wr_override_value = 0; /* Rtt_WR= dynamic ODT off */
+}