Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / freescale / t208xqds / ddr.c

diff --git a/qemu/roms/u-boot/board/freescale/t208xqds/ddr.c b/qemu/roms/u-boot/board/freescale/t208xqds/ddr.c
new file mode 100644 (file)
index 0000000..3348971
--- /dev/null
+++ b/qemu/roms/u-boot/board/freescale/t208xqds/ddr.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2013 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 or later as published by the Free Software Foundation.
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <hwconfig.h>
+#include <asm/mmu.h>
+#include <fsl_ddr_sdram.h>
+#include <fsl_ddr_dimm_params.h>
+#include <asm/fsl_law.h>
+#include "ddr.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+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 > 1) {
+               printf("Not supported controller number %d\n", ctrl_num);
+               return;
+       }
+       if (!pdimm->n_ranks)
+               return;
+
+       /*
+        * we use identical timing for all slots. If needed, change the code
+        * to  pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
+        */
+       if (popts->registered_dimm_en)
+               pbsp = rdimms[0];
+       else
+               pbsp = udimms[0];
+
+       /* Get clk_adjust, wrlvl_start, wrlvl_ctl, 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 &&
+                   (pdimm->rank_density >> 30) >= pbsp->rank_gb) {
+                       if (ddr_freq <= pbsp->datarate_mhz_high) {
+                               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;
+                               goto found;
+                       }
+                       pbsp_highest = pbsp;
+               }
+               pbsp++;
+       }
+
+       if (pbsp_highest) {
+               printf("Error: board specific timing not found");
+               printf("for data rate %lu MT/s\n", ddr_freq);
+               printf("Trying to use the highest speed (%u) parameters\n",
+                      pbsp_highest->datarate_mhz_high);
+               popts->clk_adjust = pbsp_highest->clk_adjust;
+               popts->wrlvl_start = pbsp_highest->wrlvl_start;
+               popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2;
+               popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3;
+       } else {
+               panic("DIMM is not supported by this board");
+       }
+found:
+       debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n"
+               "\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, "
+               "wrlvl_ctrl_3 0x%x\n",
+               pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb,
+               pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2,
+               pbsp->wrlvl_ctl_3);
+
+       /*
+        * 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();
+
+       dram_size = setup_ddr_tlbs(dram_size / 0x100000);
+       dram_size *= 0x100000;
+#else
+       /* DDR has been initialised by first stage boot loader */
+       dram_size =  fsl_ddr_sdram_size();
+#endif
+
+       return dram_size;
+}