The current mainline support is experimental only and is not useful for
anything. It should provide a base on which to build.
-So far only support for the RK3288 is provided.
+So far only support for the RK3288 and RK3036 is provided.
Prerequisites
You will need:
- - Firefly RK3288 baord
+ - Firefly RK3288 board or something else with a supported RockChip SoC
- Power connection to 5V using the supplied micro-USB power cable
- Separate USB serial cable attached to your computer and the Firefly
(connect to the micro-USB connector below the logo)
Building
========
-At present three RK3288 boards are supported:
+At present eight RK3288 boards are supported:
+ - EVB RK3288 - use evb-rk3288 configuration
+ - Fennec RK3288 - use fennec-rk3288 configuration
- Firefly RK3288 - use firefly-rk3288 configuration
- - Radxa Rock 2 - also uses firefly-rk3288 configuration
- - Haier Chromebook - use chromebook_jerry configuration
+ - Hisense Chromebook - use chromebook_jerry configuration
+ - MiQi RK3288 - use miqi-rk3288 configuration
+ - PopMetal RK3288 - use popmetal-rk3288 configuration
+ - Radxa Rock 2 - use rock2 configuration
+ - Tinker RK3288 - use tinker-rk3288 configuration
-one RK3036 board is support:
+Two RK3036 board are supported:
- - EVB RK3036 - use evb-rk3036_defconfig configuration
+ - EVB RK3036 - use evb-rk3036 configuration
+ - Kylin - use kylin_rk3036 configuration
For example:
(or you can use another cross compiler if you prefer)
-Note that the Radxa Rock 2 uses the Firefly configuration for now as
-device tree files are not yet available for the Rock 2. Clearly the two
-have hardware differences, so this approach will break down as more drivers
-are added.
-
Writing to the board with USB
=============================
Put this SD (or micro-SD) card into your board and reset it. You should see
something like:
- U-Boot SPL 2015.07-rc1-00383-ge345740-dirty (Jun 03 2015 - 11:04:40)
+ U-Boot 2016.01-rc2-00309-ge5bad3b-dirty (Jan 02 2016 - 23:41:59 -0700)
+ Model: Radxa Rock 2 Square
+ DRAM: 2 GiB
+ MMC: dwmmc@ff0f0000: 0, dwmmc@ff0c0000: 1
+ *** Warning - bad CRC, using default environment
+
+ In: serial
+ Out: vop@ff940000.vidconsole
+ Err: serial
+ Net: Net Initialization Skipped
+ No ethernet found.
+ Hit any key to stop autoboot: 0
+ =>
- U-Boot 2015.07-rc1-00383-ge345740-dirty (Jun 03 2015 - 11:04:40)
+The rockchip bootrom can load and boot an initial spl, then continue to
+load a second-level bootloader(ie. U-BOOT) as soon as it returns to bootrom.
+Therefore RK3288 has another loading sequence like RK3036. The option of
+U-Boot is controlled with this setting in U-Boot:
- DRAM: 2 GiB
- MMC:
- Using default environment
+ #define CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
- In: serial@ff690000
- Out: serial@ff690000
- Err: serial@ff690000
- =>
+You can create the image via the following operations:
+
+ ./firefly-rk3288/tools/mkimage -n rk3288 -T rksd -d \
+ firefly-rk3288/spl/u-boot-spl-dtb.bin out && \
+ cat firefly-rk3288/u-boot-dtb.bin >> out && \
+ sudo dd if=out of=/dev/sdc seek=64
+
+If you have an HDMI cable attached you should see a video console.
For evb_rk3036 board:
./evb-rk3036/tools/mkimage -n rk3036 -T rksd -d evb-rk3036/spl/u-boot-spl.bin out && \
Note: rk3036 SDMMC and debug uart use the same iomux, so if you boot from SD, the
debug uart must be disabled
+
+Booting from an SD card on RK3188
+=================================
+
+For rk3188 boards the general storage onto the card stays the same as
+described above, but the image creation needs a bit more care.
+
+The bootrom of rk3188 expects to find a small 1kb loader which returns
+control to the bootrom, after which it will load the real loader, which
+can then be up to 29kb in size and does the regular ddr init.
+
+Additionally the rk3188 requires everything the bootrom loads to be
+rc4-encrypted. Except for the very first stage the bootrom always reads
+and decodes 2kb pages, so files should be sized accordingly.
+
+# copy tpl, pad to 1020 bytes and append spl
+cat tpl/u-boot-tpl.bin > tplspl.bin
+truncate -s 1020 tplspl.bin
+cat spl/u-boot-spl.bin >> tplspl.bin
+tools/mkimage -n rk3188 -T rksd -d tplspl.bin out
+
+# truncate, encode and append u-boot.bin
+truncate -s %2048 u-boot.bin
+cat u-boot.bin | split -b 512 --filter='openssl rc4 -K 7C4E0304550509072D2C7B38170D1711' >> out
+
+
+Using fastboot on rk3288
+========================
+- Write GPT partition layout to mmc device which fastboot want to use it to
+store the image
+
+ => gpt write mmc 1 $partitions
+
+- Invoke fastboot command to prepare
+
+ => fastboot 1
+
+- Start fastboot request on PC
+
+ fastboot -i 0x2207 flash loader evb-rk3288/spl/u-boot-spl-dtb.bin
+
+You should see something like:
+
+ => fastboot 1
+ WARNING: unknown variable: partition-type:loader
+ Starting download of 357796 bytes
+ ..
+ downloading of 357796 bytes finished
+ Flashing Raw Image
+ ........ wrote 357888 bytes to 'loader'
+
Booting from SPI
================
Err: serial@ff690000
=>
-
Future work
===========
Immediate priorities are:
-- GPIO (driver exists but is lightly tested)
-- I2C (driver exists but is non-functional)
- USB host
- USB device
-- PMIC and regulators (only ACT8846 is supported at present)
-- LCD and HDMI
-- Run CPU at full speed
-- Ethernet
+- Run CPU at full speed (code exists but we only see ~60 DMIPS maximum)
- NAND flash
- Support for other Rockchip parts
- Boot U-Boot proper over USB OTG (at present only SPL works)
See above for instructions on how to write a SPI image.
+rkmux.py
+--------
+
+You can use this script to create #defines for SoC register access. See the
+script for usage.
+
Device tree and driver model
----------------------------
In general all Rockchip drivers should use these features, with SPL-specific
modifications where required.
+GPT partition layout
+----------------------------
+
+Rockchip use a unified GPT partition layout in open source support.
+With this GPT partition layout, uboot can be compatilbe with other components,
+like miniloader, trusted-os, arm-trust-firmware.
+
+There are some documents about partitions in the links below.
+http://rockchip.wikidot.com/partitions
--
Simon Glass <sjg@chromium.org>
projects / people / ms / u-boot.git / blobdiff