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U-Boot for UniPhier SoC family
==============================
Recommended toolchains
----------------------
The UniPhier platform is well tested with Linaro toolchains.
You can download pre-built toolchains from:
http://www.linaro.org/downloads/
Compile the source
------------------
The source can be configured and built with the following commands:
$ make <defconfig>
$ make CROSS_COMPILE=<toolchain-prefix> DEVICE_TREE=<device-tree>
The recommended <toolchain-prefix> is `arm-linux-gnueabihf-` for 32bit SoCs,
`aarch64-linux-gnu-` for 64bit SoCs, but you may wish to change it to use your
favorite compiler.
The following tables show <defconfig> and <device-tree> for each board.
Board | <defconfig> | <device-tree>
---------------|-----------------------------|------------------------------
LD4 reference | uniphier_ld4_sld8_defconfig | uniphier-ld4-ref (default)
sld8 reference | uniphier_ld4_sld8_defconfig | uniphier-sld8-def
Pro4 reference | uniphier_v7_defconfig | uniphier-pro4-ref
Pro4 Ace | uniphier_v7_defconfig | uniphier-pro4-ace
Pro4 Sanji | uniphier_v7_defconfig | uniphier-pro4-sanji
Pro5 4KBOX | uniphier_v7_defconfig | uniphier-pro5-4kbox
PXs2 Gentil | uniphier_v7_defconfig | uniphier-pxs2-gentil
PXs2 Vodka | uniphier_v7_defconfig | uniphier-pxs2-vodka (default)
LD6b reference | uniphier_v7_defconfig | uniphier-ld6b-ref
Board | <defconfig> | <device-tree>
---------------|-----------------------|----------------------------
LD11 reference | uniphier_v8_defconfig | uniphier-ld11-ref
LD11 Global | uniphier_v8_defconfig | uniphier-ld11-global
LD20 reference | uniphier_v8_defconfig | uniphier-ld20-ref (default)
LD20 Global | uniphier_v8_defconfig | uniphier-ld20-global
PXs3 reference | uniphier_v8_defconfig | uniphier-pxs3-ref
For example, to compile the source for PXs2 Vodka board, run the following:
$ make uniphier_v7_defconfig
$ make CROSS_COMPILE=arm-linux-gnueabihf- DEVICE_TREE=uniphier-pxs2-vodka
The device tree marked as (default) can be omitted. `uniphier-pxs2-vodka` is
the default device tree for the configuration `uniphier_v7_defconfig`, so the
following gives the same result.
$ make uniphier_v7_defconfig
$ make CROSS_COMPILE=arm-linux-gnueabihf-
Booting 32bit SoC boards
------------------------
The build command will generate the following:
- u-boot.bin
- spl/u-boot.bin
U-Boot can boot UniPhier 32bit SoC boards by itself. Flash the generated images
to the storage device (NAND or eMMC) on your board.
- spl/u-boot-spl.bin at the offset address 0x00000000
- u-boot.bin at the offset address 0x00020000
The `u-boot-with-spl.bin` is the concatenation of the two (with appropriate
padding), so you can also do:
- u-boot-with-spl.bin at the offset address 0x00000000
If a TFTP server is available, the images can be easily updated.
Just copy the u-boot-spl.bin and u-boot.bin to the TFTP public directory,
and run the following command at the U-Boot command line:
Booting 64bit SoC boards
------------------------
The build command will generate the following:
- u-boot.bin
However, U-Boot is not the first stage loader for UniPhier 64bit SoC boards.
U-Boot serves as a non-secure boot loader loaded by [ARM Trusted Firmware],
so you need to provide the `u-boot.bin` to the build command of ARM Trusted
Firmware.
[ARM Trusted Firmware]: https://github.com/ARM-software/arm-trusted-firmware
UniPhier specific commands
--------------------------
- pinmon (enabled by CONFIG_CMD_PINMON)
shows the boot mode pins that has been latched at the power-on reset
- ddrphy (enabled by CONFIG_CMD_DDRPHY_DUMP)
shows the DDR PHY parameters set by the PHY training
- ddrmphy (enabled by CONFIG_CMD_DDRMPHY_DUMP)
shows the DDR Multi PHY parameters set by the PHY training
Supported devices
-----------------
- UART (on-chip)
- NAND
- SD/eMMC
- USB 2.0 (EHCI)
- USB 3.0 (xHCI)
- LAN (on-board SMSC9118)
- I2C
- EEPROM (connected to the on-board I2C bus)
- Support card (SRAM, NOR flash, some peripherals)
Micro Support Card
------------------
The recommended bit switch settings are as follows:
SW2 OFF(1)/ON(0) Description
------------------------------------------
bit 1 <---- BKSZ[0]
bit 2 ----> BKSZ[1]
bit 3 <---- SoC Bus Width 16/32
bit 4 <---- SERIAL_SEL[0]
bit 5 ----> SERIAL_SEL[1]
bit 6 ----> BOOTSWAP_EN
bit 7 <---- CS1/CS5
bit 8 <---- SOC_SERIAL_DISABLE
SW8 OFF(1)/ON(0) Description
------------------------------------------
bit 1 <---- CS1_SPLIT
bit 2 <---- CASE9_ON
bit 3 <---- CASE10_ON
bit 4 Don't Care Reserve
bit 5 Don't Care Reserve
bit 6 Don't Care Reserve
bit 7 ----> BURST_EN
bit 8 ----> FLASHBUS32_16
The BKSZ[1:0] specifies the address range of memory slot and peripherals
as follows:
BKSZ Description RAM slot Peripherals
--------------------------------------------------------------------
0b00 15MB RAM / 1MB Peri 00000000-00efffff 00f00000-00ffffff
0b01 31MB RAM / 1MB Peri 00000000-01efffff 01f00000-01ffffff
0b10 64MB RAM / 1MB Peri 00000000-03efffff 03f00000-03ffffff
0b11 127MB RAM / 1MB Peri 00000000-07efffff 07f00000-07ffffff
Set BSKZ[1:0] to 0b01 for U-Boot.
This mode is the most handy because EA[24] is always supported by the save pin
mode of the system bus. On the other hand, EA[25] is not supported for some
newer SoCs. Even if it is, EA[25] is not connected on most of the boards.
Masahiro Yamada <yamada.masahiro@socionext.com>
Sep. 2017