summaryrefslogtreecommitdiff
path: root/board/freescale/mpc8540ads/ddr.c
diff options
context:
space:
mode:
authorKumar Gala <galak@kernel.crashing.org>2008-06-06 13:12:18 -0500
committerKumar Gala <galak@kernel.crashing.org>2008-08-27 11:43:48 -0500
commit9617c8d49a21703eaf13a4033ab1a56eecc033cc (patch)
tree82d74807cf979a8848774b8593c4a7f1d2906672 /board/freescale/mpc8540ads/ddr.c
parent2a6c2d7ab2a66660f40a6cd3de2eb29ee29d9693 (diff)
downloadu-boot-imx-9617c8d49a21703eaf13a4033ab1a56eecc033cc.zip
u-boot-imx-9617c8d49a21703eaf13a4033ab1a56eecc033cc.tar.gz
u-boot-imx-9617c8d49a21703eaf13a4033ab1a56eecc033cc.tar.bz2
FSL DDR: Convert MPC8540ADS to new DDR code.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'board/freescale/mpc8540ads/ddr.c')
-rw-r--r--board/freescale/mpc8540ads/ddr.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/board/freescale/mpc8540ads/ddr.c b/board/freescale/mpc8540ads/ddr.c
new file mode 100644
index 0000000..45372f4
--- /dev/null
+++ b/board/freescale/mpc8540ads/ddr.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2008 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 <asm/fsl_ddr_sdram.h>
+
+static void
+get_spd(ddr1_spd_eeprom_t *spd, unsigned char i2c_address)
+{
+ i2c_read(i2c_address, 0, 1, (uchar *)spd, sizeof(ddr1_spd_eeprom_t));
+}
+
+
+unsigned int
+fsl_ddr_get_mem_data_rate(void)
+{
+ return get_ddr_freq(0);
+}
+
+
+void
+fsl_ddr_get_spd(ddr1_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 && i == 0) {
+ i2c_address = SPD_EEPROM_ADDRESS;
+ }
+ get_spd(&(ctrl_dimms_spd[i]), i2c_address);
+ }
+}
+
+void fsl_ddr_board_options(memctl_options_t *popts, unsigned int ctrl_num)
+{
+ /*
+ * Factors to consider for CPO:
+ * - frequency
+ * - ddr1 vs. ddr2
+ */
+ popts->cpo_override = 0;
+
+ /*
+ * Factors to consider for write data delay:
+ * - number of DIMMs
+ *
+ * 1 = 1/4 clock delay
+ * 2 = 1/2 clock delay
+ * 3 = 3/4 clock delay
+ * 4 = 1 clock delay
+ * 5 = 5/4 clock delay
+ * 6 = 3/2 clock delay
+ */
+ popts->write_data_delay = 3;
+
+ /*
+ * Factors to consider for half-strength driver enable:
+ * - number of DIMMs installed
+ */
+ popts->half_strength_driver_enable = 0;
+}