sunxi: dram: Support more sun[457]i dram parameters in Kconfig
This patch allows to configure all the important DRAM parameters in Kconfig.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index da4e8ba..4a21589 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -41,6 +41,15 @@
Set the dram clock speed, valid range 240 - 480, must be a multiple
of 24.
+if MACH_SUN5I || MACH_SUN7I
+config DRAM_MBUS_CLK
+ int "sunxi mbus clock speed"
+ default 300
+ ---help---
+ Set the mbus clock speed. The maximum on sun5i hardware is 300MHz.
+
+endif
+
config DRAM_ZQ
int "sunxi dram zq value"
default 123 if MACH_SUN4I || MACH_SUN5I || MACH_SUN6I || MACH_SUN8I
@@ -56,6 +65,40 @@
---help---
Set the dram controller emr1 value.
+config DRAM_ODT_EN
+ int "sunxi dram odt_en value"
+ default 0
+ ---help---
+ Set the dram controller odt_en parameter. This can be used to
+ enable/disable the ODT feature.
+
+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
diff --git a/board/sunxi/dram_sun4i_auto.c b/board/sunxi/dram_sun4i_auto.c
index ed54150..09e0c9a 100644
--- a/board/sunxi/dram_sun4i_auto.c
+++ b/board/sunxi/dram_sun4i_auto.c
@@ -9,7 +9,7 @@
.io_width = 0,
.bus_width = 0,
.zq = CONFIG_DRAM_ZQ,
- .odt_en = 0,
+ .odt_en = CONFIG_DRAM_ODT_EN,
.size = 0,
#ifdef CONFIG_DRAM_TIMINGS_VENDOR_MAGIC
.cas = 6,
@@ -19,12 +19,14 @@
.emr2 = 0,
#else
# include "dram_timings_sun4i.h"
+ .active_windowing = 1,
#endif
- .tpr3 = 0,
+ .tpr3 = CONFIG_DRAM_TPR3,
.tpr4 = 0,
.tpr5 = 0,
.emr1 = CONFIG_DRAM_EMR1,
.emr3 = 0,
+ .dqs_gating_delay = CONFIG_DRAM_DQS_GATING_DELAY,
};
unsigned long sunxi_dram_init(void)
diff --git a/board/sunxi/dram_sun5i_auto.c b/board/sunxi/dram_sun5i_auto.c
index bd9fd4b..e52d54c 100644
--- a/board/sunxi/dram_sun5i_auto.c
+++ b/board/sunxi/dram_sun5i_auto.c
@@ -5,13 +5,14 @@
static struct dram_para dram_para = {
.clock = CONFIG_DRAM_CLK,
+ .mbus_clock = CONFIG_DRAM_MBUS_CLK,
.type = 3,
.rank_num = 1,
.density = 0,
.io_width = 0,
.bus_width = 0,
.zq = CONFIG_DRAM_ZQ,
- .odt_en = 0,
+ .odt_en = CONFIG_DRAM_ODT_EN,
.size = 0,
#ifdef CONFIG_DRAM_TIMINGS_VENDOR_MAGIC
.cas = 9,
@@ -21,12 +22,14 @@
.emr2 = 0x10,
#else
# include "dram_timings_sun4i.h"
+ .active_windowing = 1,
#endif
.tpr3 = 0,
.tpr4 = 0,
.tpr5 = 0,
.emr1 = CONFIG_DRAM_EMR1,
.emr3 = 0,
+ .dqs_gating_delay = CONFIG_DRAM_DQS_GATING_DELAY,
};
unsigned long sunxi_dram_init(void)