86xx: XPedite5170 board support
Initial support for Extreme Engineering Solutions XPedite5170 -
a MPC8640-based 3U VPX single board computer with a PMC/XMC
site.
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/board/xes/xpedite5170/ddr.c b/board/xes/xpedite5170/ddr.c
new file mode 100644
index 0000000..1d57d09
--- /dev/null
+++ b/board/xes/xpedite5170/ddr.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright 2009 Extreme Engineering Solutions, Inc.
+ * Copyright 2007-2008 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <asm/fsl_ddr_sdram.h>
+#include <asm/fsl_ddr_dimm_params.h>
+
+static void get_spd(ddr2_spd_eeprom_t *spd, unsigned char i2c_address)
+{
+ i2c_read(i2c_address, SPD_EEPROM_OFFSET, 2, (uchar *)spd,
+ sizeof(ddr2_spd_eeprom_t));
+}
+
+unsigned int fsl_ddr_get_mem_data_rate(void)
+{
+ return get_bus_freq(0);
+}
+
+void fsl_ddr_get_spd(ddr2_spd_eeprom_t *ctrl_dimms_spd,
+ unsigned int ctrl_num)
+{
+ unsigned int i;
+ unsigned int i2c_address = 0;
+
+ for (i = 0; i < CONFIG_DIMM_SLOTS_PER_CTLR; i++) {
+ if (ctrl_num == 0) {
+ i2c_address = SPD_EEPROM_ADDRESS1;
+#ifdef SPD_EEPROM_ADDRESS2
+ } else if (ctrl_num == 1) {
+ i2c_address = SPD_EEPROM_ADDRESS2;
+#endif
+ } else {
+ /* An inalid ctrl number was give, use default SPD */
+ printf("ERROR: invalid DDR ctrl: %d\n", ctrl_num);
+ i2c_address = SPD_EEPROM_ADDRESS1;
+ }
+
+ get_spd(&(ctrl_dimms_spd[i]), i2c_address);
+ }
+}
+
+/*
+ * There are four board-specific SDRAM timing parameters which must be
+ * calculated based on the particular PCB artwork. These are:
+ * 1.) CPO (Read Capture Delay)
+ * - TIMING_CFG_2 register
+ * Source: Calculation based on board trace lengths and
+ * chip-specific internal delays.
+ * 2.) WR_DATA_DELAY (Write Command to Data Strobe Delay)
+ * - TIMING_CFG_2 register
+ * Source: Calculation based on board trace lengths.
+ * Unless clock and DQ lanes are very different
+ * lengths (>2"), this should be set to the nominal value
+ * of 1/2 clock delay.
+ * 3.) CLK_ADJUST (Clock and Addr/Cmd alignment control)
+ * - DDR_SDRAM_CLK_CNTL register
+ * Source: Signal Integrity Simulations
+ * 4.) 2T Timing on Addr/Ctl
+ * - TIMING_CFG_2 register
+ * Source: Signal Integrity Simulations
+ * Usually only needed with heavy load/very high speed (>DDR2-800)
+ *
+ * PCB routing on the XPedite5170 is nearly identical to the XPedite5370
+ * so we use the XPedite5370 settings as a basis for the XPedite5170.
+ */
+
+typedef struct board_memctl_options {
+ uint16_t datarate_mhz_low;
+ uint16_t datarate_mhz_high;
+ uint8_t clk_adjust;
+ uint8_t cpo_override;
+ uint8_t write_data_delay;
+} board_memctl_options_t;
+
+static struct board_memctl_options bopts_ctrl[][2] = {
+ {
+ /* Controller 0 */
+ {
+ /* DDR2 600/667 */
+ .datarate_mhz_low = 500,
+ .datarate_mhz_high = 750,
+ .clk_adjust = 5,
+ .cpo_override = 8,
+ .write_data_delay = 2,
+ },
+ {
+ /* DDR2 800 */
+ .datarate_mhz_low = 750,
+ .datarate_mhz_high = 850,
+ .clk_adjust = 5,
+ .cpo_override = 9,
+ .write_data_delay = 2,
+ },
+ },
+ {
+ /* Controller 1 */
+ {
+ /* DDR2 600/667 */
+ .datarate_mhz_low = 500,
+ .datarate_mhz_high = 750,
+ .clk_adjust = 5,
+ .cpo_override = 7,
+ .write_data_delay = 2,
+ },
+ {
+ /* DDR2 800 */
+ .datarate_mhz_low = 750,
+ .datarate_mhz_high = 850,
+ .clk_adjust = 5,
+ .cpo_override = 8,
+ .write_data_delay = 2,
+ },
+ },
+};
+
+void fsl_ddr_board_options(memctl_options_t *popts,
+ dimm_params_t *pdimm,
+ unsigned int ctrl_num)
+{
+ struct board_memctl_options *bopts = bopts_ctrl[ctrl_num];
+ sys_info_t sysinfo;
+ int i;
+ unsigned int datarate;
+
+ get_sys_info(&sysinfo);
+ datarate = fsl_ddr_get_mem_data_rate() / 1000000;
+
+ for (i = 0; i < ARRAY_SIZE(bopts_ctrl[ctrl_num]); i++) {
+ if ((bopts[i].datarate_mhz_low <= datarate) &&
+ (bopts[i].datarate_mhz_high >= datarate)) {
+ debug("controller %d:\n", ctrl_num);
+ debug(" clk_adjust = %d\n", bopts[i].clk_adjust);
+ debug(" cpo = %d\n", bopts[i].cpo_override);
+ debug(" write_data_delay = %d\n",
+ bopts[i].write_data_delay);
+ popts->clk_adjust = bopts[i].clk_adjust;
+ popts->cpo_override = bopts[i].cpo_override;
+ popts->write_data_delay = bopts[i].write_data_delay;
+ }
+ }
+
+ /*
+ * Factors to consider for half-strength driver enable:
+ * - number of DIMMs installed
+ */
+ popts->half_strength_driver_enable = 0;
+}