Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / freescale / mpc8641hpcn / ddr.c

diff --git a/qemu/roms/u-boot/board/freescale/mpc8641hpcn/ddr.c b/qemu/roms/u-boot/board/freescale/mpc8641hpcn/ddr.c
new file mode 100644 (file)
index 0000000..7cd0395
--- /dev/null
+++ b/qemu/roms/u-boot/board/freescale/mpc8641hpcn/ddr.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2008,2011 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 <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;
+};
+
+/*
+ * 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.
+ */
+const struct board_specific_parameters dimm0[] = {
+       /*
+        * memory controller 0
+        *   num|  hi|  clk| cpo|wrdata|2T
+        * ranks| mhz|adjst|    | delay|
+        */
+       {4,  333,    7,   7,     3},
+       {4,  549,    7,   9,     3},
+       {4,  650,    7,  10,     4},
+       {2,  333,    7,   7,     3},
+       {2,  549,    7,   9,     3},
+       {2,  650,    7,  10,     4},
+       {1,  333,    7,   7,     3},
+       {1,  549,    7,   9,     3},
+       {1,  650,    7,  10,     4},
+       {}
+};
+
+/*
+ * The two slots have slightly different timing. The center values are good
+ * for both slots. We use identical speed tables for them. In future use, if
+ * DIMMs have fewer center values that require two separated tables, copy the
+ * udimm0 table to udimm1 and make changes to clk_adjust and wrlvl_start.
+ */
+const struct board_specific_parameters *dimms[] = {
+       dimm0,
+       dimm0,
+};
+
+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;
+       unsigned int i;
+       ulong ddr_freq;
+
+       if (ctrl_num > 1) {
+               printf("Wrong parameter for controller number %d", ctrl_num);
+               return;
+       }
+       for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
+               if (pdimm[i].n_ranks)
+                       break;
+       }
+       if (i >= CONFIG_DIMM_SLOTS_PER_CTLR)    /* no DIMM */
+               return;
+
+       pbsp = dimms[ctrl_num];
+
+       /* Get clk_adjust, cpo, write_data_delay, 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[i].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;
+                               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;
+       } else {
+               panic("DIMM is not supported by this board");
+       }
+
+found:
+       /* 2T timing enable */
+       popts->twot_en = 1;
+}