+config DRAM_ODT_EN
+ bool "sunxi dram odt enable"
+ default n if !MACH_SUN8I_A23
+ default y if MACH_SUN8I_A23
+ ---help---
+ Select this to enable dram odt (on die termination).
+
+if MACH_SUN4I || MACH_SUN5I || MACH_SUN7I
+config DRAM_EMR1
+ int "sunxi dram emr1 value"
+ default 0 if MACH_SUN4I
+ default 4 if MACH_SUN5I || MACH_SUN7I
+ ---help---
+ Set the dram controller emr1 value.
+
+config DRAM_TPR3
+ hex "sunxi dram tpr3 value"
+ default 0
+ ---help---
+ Set the dram controller tpr3 parameter. This parameter configures
+ the delay on the command lane and also phase shifts, which are
+ applied for sampling incoming read data. The default value 0
+ means that no phase/delay adjustments are necessary. Properly
+ configuring this parameter increases reliability at high DRAM
+ clock speeds.
+
+config DRAM_DQS_GATING_DELAY
+ hex "sunxi dram dqs_gating_delay value"
+ default 0
+ ---help---
+ Set the dram controller dqs_gating_delay parmeter. Each byte
+ encodes the DQS gating delay for each byte lane. The delay
+ granularity is 1/4 cycle. For example, the value 0x05060606
+ means that the delay is 5 quarter-cycles for one lane (1.25
+ cycles) and 6 quarter-cycles (1.5 cycles) for 3 other lanes.
+ The default value 0 means autodetection. The results of hardware
+ autodetection are not very reliable and depend on the chip
+ temperature (sometimes producing different results on cold start
+ and warm reboot). But the accuracy of hardware autodetection
+ is usually good enough, unless running at really high DRAM
+ clocks speeds (up to 600MHz). If unsure, keep as 0.
+
+choice
+ prompt "sunxi dram timings"
+ default DRAM_TIMINGS_VENDOR_MAGIC
+ ---help---
+ Select the timings of the DDR3 chips.
+
+config DRAM_TIMINGS_VENDOR_MAGIC
+ bool "Magic vendor timings from Android"
+ ---help---
+ The same DRAM timings as in the Allwinner boot0 bootloader.
+
+config DRAM_TIMINGS_DDR3_1066F_1333H
+ bool "JEDEC DDR3-1333H with down binning to DDR3-1066F"
+ ---help---
+ Use the timings of the standard JEDEC DDR3-1066F speed bin for
+ DRAM_CLK <= 533MHz and the timings of the DDR3-1333H speed bin
+ for DRAM_CLK > 533MHz. This covers the majority of DDR3 chips
+ used in Allwinner A10/A13/A20 devices. In the case of DDR3-1333
+ or DDR3-1600 chips, be sure to check the DRAM datasheet to confirm
+ that down binning to DDR3-1066F is supported (because DDR3-1066F
+ uses a bit faster timings than DDR3-1333H).
+
+config DRAM_TIMINGS_DDR3_800E_1066G_1333J
+ bool "JEDEC DDR3-800E / DDR3-1066G / DDR3-1333J"
+ ---help---
+ Use the timings of the slowest possible JEDEC speed bin for the
+ selected DRAM_CLK. Depending on the DRAM_CLK value, it may be
+ DDR3-800E, DDR3-1066G or DDR3-1333J.
+
+endchoice
+
+endif
+
+if MACH_SUN8I_A23
+config DRAM_ODT_CORRECTION
+ int "sunxi dram odt correction value"
+ default 0
+ ---help---
+ Set the dram odt correction value (range -255 - 255). In allwinner
+ fex files, this option is found in bits 8-15 of the u32 odt_en variable
+ in the [dram] section. When bit 31 of the odt_en variable is set
+ then the correction is negative. Usually the value for this is 0.
projects / platform / kernel / u-boot.git / blobdiff