Hi,
this is the extracted version of the Allwinner D1/D1s/R528/T113-s DRAM "driver", to be included into mainline U-Boot at some point. With this on top of my previous T113-s3 support series[1], I can boot my MangoPi MQ-R without the help of awboot. The DRAM init code is based on awboot's version, though has been heavily reworked. To show what has been done, I pushed a history branch [2], which takes a verbatim copy of awboot's mctl_hal.c, then converts this over the course of about 80 patches into the version posted here. The series there contains an awboot/U-Boot compat layer, so the file can be used in both repositories. This compat layer is dropped here, but can be put back by reverting the top patch of [2].
I was wondering if people could have a look at this version here, to give early feedback. I will (re-)post this as part of a proper R528/T113-s support series, but first need to sort out some minor issues and address Samuel's comments on the previous version.
If you wonder, the (working!) Kconfig DRAM variables for the T113-s3 are: CONFIG_DRAM_CLK=792 CONFIG_DRAM_ZQ=8092667 CONFIG_DRAM_SUNXI_ODT_EN=0 CONFIG_DRAM_SUNXI_TPR0=0x004a2195 CONFIG_DRAM_SUNXI_TPR11=0x340000 CONFIG_DRAM_SUNXI_TPR12=0x46 CONFIG_DRAM_SUNXI_TPR13=0x34000100
For the D1 with DDR3 chips (most boards?), it should be those values: CONFIG_DRAM_CLK=792 CONFIG_DRAM_SUNXI_ODT_EN=1 CONFIG_DRAM_SUNXI_TPR0=0x004a2195 CONFIG_DRAM_SUNXI_TPR11=0x870000 CONFIG_DRAM_SUNXI_TPR12=0x24 CONFIG_DRAM_SUNXI_TPR13=0x34050100
According to the dump of some MangoPi MQ-1 firmware, the D1s should work with: CONFIG_SUNXI_DRAM_DDR2=y CONFIG_DRAM_CLK=528 CONFIG_DRAM_ZQ=8092665 CONFIG_DRAM_SUNXI_ODT_EN=0 CONFIG_DRAM_SUNXI_TPR0=0x00471992 CONFIG_DRAM_SUNXI_TPR11=0x30010 CONFIG_DRAM_SUNXI_TPR12=0x35 CONFIG_DRAM_SUNXI_TPR13=0x34000000
Many thanks! Andre
[1] https://lore.kernel.org/u-boot/20221206004549.29015-1-andre.przywara@arm.com... [2] https://github.com/apritzel/u-boot/commits/d1_dram_history
Andre Przywara (2): Kconfig: sunxi: prepare for using drivers/ram/sunxi sunxi: add R528/T113-s3/D1(s) DRAM initialisation code
drivers/Makefile | 1 + drivers/ram/Kconfig | 3 +- drivers/ram/Makefile | 2 + drivers/ram/sunxi/Kconfig | 68 ++ drivers/ram/sunxi/Makefile | 4 + drivers/ram/sunxi/dram_sun20i_d1.c | 1425 ++++++++++++++++++++++++++++ drivers/ram/sunxi/dram_sun20i_d1.h | 70 ++ 7 files changed, 1572 insertions(+), 1 deletion(-) create mode 100644 drivers/ram/sunxi/Kconfig create mode 100644 drivers/ram/sunxi/Makefile create mode 100644 drivers/ram/sunxi/dram_sun20i_d1.c create mode 100644 drivers/ram/sunxi/dram_sun20i_d1.h