183d290c5STom Rini# SPDX-License-Identifier: GPL-2.0+ 2adfb2bfeSSimon Glass# 3adfb2bfeSSimon Glass# Copyright (C) 2015 Google. Inc 4adfb2bfeSSimon Glass# Written by Simon Glass <sjg@chromium.org> 5adfb2bfeSSimon Glass 6adfb2bfeSSimon GlassU-Boot on Rockchip 7adfb2bfeSSimon Glass================== 8adfb2bfeSSimon Glass 90c14c366SSimon GlassA wide range of Rockchip SoCs are supported in mainline U-Boot 10adfb2bfeSSimon Glass 11adfb2bfeSSimon Glass 12adfb2bfeSSimon GlassPrerequisites 13adfb2bfeSSimon Glass============= 14adfb2bfeSSimon Glass 15adfb2bfeSSimon GlassYou will need: 16adfb2bfeSSimon Glass 17f1387130SSimon Glass - Firefly RK3288 board or something else with a supported RockChip SoC 18adfb2bfeSSimon Glass - Power connection to 5V using the supplied micro-USB power cable 19adfb2bfeSSimon Glass - Separate USB serial cable attached to your computer and the Firefly 20adfb2bfeSSimon Glass (connect to the micro-USB connector below the logo) 21adfb2bfeSSimon Glass - rkflashtool [3] 22adfb2bfeSSimon Glass - openssl (sudo apt-get install openssl) 23adfb2bfeSSimon Glass - Serial UART connection [4] 24adfb2bfeSSimon Glass - Suitable ARM cross compiler, e.g.: 25adfb2bfeSSimon Glass sudo apt-get install gcc-4.7-arm-linux-gnueabi 26adfb2bfeSSimon Glass 27adfb2bfeSSimon Glass 28adfb2bfeSSimon GlassBuilding 29adfb2bfeSSimon Glass======== 30adfb2bfeSSimon Glass 3116217f96SSimon GlassAt present 12 RK3288 boards are supported: 32adfb2bfeSSimon Glass 33744368d6SXu Ziyuan - EVB RK3288 - use evb-rk3288 configuration 34d7ca67b7Sjk.kernel@gmail.com - Fennec RK3288 - use fennec-rk3288 configuration 351c62d999SXu Ziyuan - Firefly RK3288 - use firefly-rk3288 configuration 361c62d999SXu Ziyuan - Hisense Chromebook - use chromebook_jerry configuration 3716217f96SSimon Glass - Asus C100P Chromebook - use chromebook_minnie configuration 3816217f96SSimon Glass - Asus Chromebit - use chromebook_mickey configuration 397da8680bSJernej Skrabec - MiQi RK3288 - use miqi-rk3288 configuration 40a84b589eSWadim Egorov - phyCORE-RK3288 RDK - use phycore-rk3288 configuration 41dd63fbc7Sjk.kernel@gmail.com - PopMetal RK3288 - use popmetal-rk3288 configuration 421c62d999SXu Ziyuan - Radxa Rock 2 - use rock2 configuration 4343b5c78dSJernej Skrabec - Tinker RK3288 - use tinker-rk3288 configuration 4416217f96SSimon Glass - Vyasa RK3288 - use vyasa-rk3288 configuration 45adfb2bfeSSimon Glass 4616217f96SSimon GlassTwo RK3036 boards are supported: 471d5a6968Shuang lin 48f1387130SSimon Glass - EVB RK3036 - use evb-rk3036 configuration 49f1387130SSimon Glass - Kylin - use kylin_rk3036 configuration 501d5a6968Shuang lin 5116217f96SSimon GlassOne RK3328 board is supported: 5216217f96SSimon Glass 5316217f96SSimon Glass - EVB RK3328 5416217f96SSimon Glass 55*9e92116bSSimon GlassSize RK3399 boards are supported (aarch64): 5616217f96SSimon Glass 5716217f96SSimon Glass - EBV RK3399 - use evb_rk3399 configuration 5816217f96SSimon Glass - Firefly RK3399 - use the firefly_rk3399 configuration 5916217f96SSimon Glass - Puma - use puma_rk3399 configuration 6016217f96SSimon Glass - Ficus - use ficus-rk3399 configuration 6116217f96SSimon Glass - Rock960 (Vamrs) - use rock960-rk3399 configuration 62*9e92116bSSimon Glass - Bob - use chromebook_bob configuration 6316217f96SSimon Glass 6416217f96SSimon GlassFour RK3368 boards are supported: 6516217f96SSimon Glass 6616217f96SSimon Glass - Sheep - use sheep-rk3368 configuration 6716217f96SSimon Glass - Lion - use lion-rk3368 configuration 6816217f96SSimon Glass - Geekbox - use geekbox configuration 6916217f96SSimon Glass - EVB PX5 - use evb-px5 configuration 7016217f96SSimon Glass 7116217f96SSimon GlassOne RK3128 board is supported: 7216217f96SSimon Glass 7316217f96SSimon Glass - EVB RK3128 - use evb-rk3128 configuration 7416217f96SSimon Glass 7516217f96SSimon GlassOne RK3229 board is supported: 7616217f96SSimon Glass 7716217f96SSimon Glass - EVB RK3229 - use evb-rk3229 configuration 7816217f96SSimon Glass 7916217f96SSimon GlassTwo RV1108 boards are supported: 8016217f96SSimon Glass 8116217f96SSimon Glass - EVB RV1108 - use evb-rv1108 configuration 8216217f96SSimon Glass - Elgin R1 - use elgin-rv1108 configuration 8316217f96SSimon Glass 8416217f96SSimon GlassOne RV3188 baord is supported: 8516217f96SSimon Glass 8616217f96SSimon Glass - Raxda Rock - use rock configuration 8716217f96SSimon Glass 8816217f96SSimon Glass 89adfb2bfeSSimon GlassFor example: 90adfb2bfeSSimon Glass 91adfb2bfeSSimon Glass CROSS_COMPILE=arm-linux-gnueabi- make O=firefly firefly-rk3288_defconfig all 92adfb2bfeSSimon Glass 93adfb2bfeSSimon Glass(or you can use another cross compiler if you prefer) 94adfb2bfeSSimon Glass 95adfb2bfeSSimon Glass 96adfb2bfeSSimon GlassWriting to the board with USB 97adfb2bfeSSimon Glass============================= 98adfb2bfeSSimon Glass 99adfb2bfeSSimon GlassFor USB to work you must get your board into ROM boot mode, either by erasing 100adfb2bfeSSimon Glassyour MMC or (perhaps) holding the recovery button when you boot the board. 101adfb2bfeSSimon GlassTo erase your MMC, you can boot into Linux and type (as root) 102adfb2bfeSSimon Glass 103adfb2bfeSSimon Glass dd if=/dev/zero of=/dev/mmcblk0 bs=1M 104adfb2bfeSSimon Glass 105adfb2bfeSSimon GlassConnect your board's OTG port to your computer. 106adfb2bfeSSimon Glass 107adfb2bfeSSimon GlassTo create a suitable image and write it to the board: 108adfb2bfeSSimon Glass 109717f8845SJeffy Chen ./firefly-rk3288/tools/mkimage -n rk3288 -T rkimage -d \ 110f2acc55eSSimon Glass ./firefly-rk3288/spl/u-boot-spl-dtb.bin out && \ 111adfb2bfeSSimon Glass cat out | openssl rc4 -K 7c4e0304550509072d2c7b38170d1711 | rkflashtool l 112adfb2bfeSSimon Glass 113adfb2bfeSSimon GlassIf all goes well you should something like: 114adfb2bfeSSimon Glass 115adfb2bfeSSimon Glass U-Boot SPL 2015.07-rc1-00383-ge345740-dirty (Jun 03 2015 - 10:06:49) 116adfb2bfeSSimon Glass Card did not respond to voltage select! 117adfb2bfeSSimon Glass spl: mmc init failed with error: -17 118adfb2bfeSSimon Glass ### ERROR ### Please RESET the board ### 119adfb2bfeSSimon Glass 120adfb2bfeSSimon GlassYou will need to reset the board before each time you try. Yes, that's all 121adfb2bfeSSimon Glassit does so far. If support for the Rockchip USB protocol or DFU were added 122adfb2bfeSSimon Glassin SPL then we could in principle load U-Boot and boot to a prompt from USB 123adfb2bfeSSimon Glassas several other platforms do. However it does not seem to be possible to 124adfb2bfeSSimon Glassuse the existing boot ROM code from SPL. 125adfb2bfeSSimon Glass 126adfb2bfeSSimon Glass 127adfb2bfeSSimon GlassBooting from an SD card 128adfb2bfeSSimon Glass======================= 129adfb2bfeSSimon Glass 130adfb2bfeSSimon GlassTo write an image that boots from an SD card (assumed to be /dev/sdc): 131adfb2bfeSSimon Glass 132717f8845SJeffy Chen ./firefly-rk3288/tools/mkimage -n rk3288 -T rksd -d \ 133f2acc55eSSimon Glass firefly-rk3288/spl/u-boot-spl-dtb.bin out && \ 134f2acc55eSSimon Glass sudo dd if=out of=/dev/sdc seek=64 && \ 13573e6dbe8SKever Yang sudo dd if=firefly-rk3288/u-boot-dtb.img of=/dev/sdc seek=16384 136adfb2bfeSSimon Glass 137adfb2bfeSSimon GlassThis puts the Rockchip header and SPL image first and then places the U-Boot 138341e44edSGoldschmidt Simonimage at block 16384 (i.e. 8MB from the start of the SD card). This 139adfb2bfeSSimon Glasscorresponds with this setting in U-Boot: 140adfb2bfeSSimon Glass 14173e6dbe8SKever Yang #define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR 0x4000 142adfb2bfeSSimon Glass 143adfb2bfeSSimon GlassPut this SD (or micro-SD) card into your board and reset it. You should see 144adfb2bfeSSimon Glasssomething like: 145adfb2bfeSSimon Glass 146f1387130SSimon Glass U-Boot 2016.01-rc2-00309-ge5bad3b-dirty (Jan 02 2016 - 23:41:59 -0700) 147adfb2bfeSSimon Glass 148f1387130SSimon Glass Model: Radxa Rock 2 Square 149adfb2bfeSSimon Glass DRAM: 2 GiB 150f1387130SSimon Glass MMC: dwmmc@ff0f0000: 0, dwmmc@ff0c0000: 1 151f1387130SSimon Glass *** Warning - bad CRC, using default environment 152adfb2bfeSSimon Glass 153f1387130SSimon Glass In: serial 154f1387130SSimon Glass Out: vop@ff940000.vidconsole 155f1387130SSimon Glass Err: serial 156f1387130SSimon Glass Net: Net Initialization Skipped 157f1387130SSimon Glass No ethernet found. 158f1387130SSimon Glass Hit any key to stop autoboot: 0 159adfb2bfeSSimon Glass => 160adfb2bfeSSimon Glass 161b47ea792SXu ZiyuanThe rockchip bootrom can load and boot an initial spl, then continue to 162760b9578SHeinrich Schuchardtload a second-stage bootloader (ie. U-Boot) as soon as the control is returned 163760b9578SHeinrich Schuchardtto the bootrom. Both the RK3288 and the RK3036 use this special boot sequence. 164760b9578SHeinrich SchuchardtThe configuration option enabling this is: 165b47ea792SXu Ziyuan 166760b9578SHeinrich Schuchardt CONFIG_SPL_ROCKCHIP_BACK_TO_BROM=y 167b47ea792SXu Ziyuan 168b47ea792SXu ZiyuanYou can create the image via the following operations: 169b47ea792SXu Ziyuan 170b47ea792SXu Ziyuan ./firefly-rk3288/tools/mkimage -n rk3288 -T rksd -d \ 171b47ea792SXu Ziyuan firefly-rk3288/spl/u-boot-spl-dtb.bin out && \ 172b47ea792SXu Ziyuan cat firefly-rk3288/u-boot-dtb.bin >> out && \ 173b47ea792SXu Ziyuan sudo dd if=out of=/dev/sdc seek=64 174b47ea792SXu Ziyuan 175f1387130SSimon GlassIf you have an HDMI cable attached you should see a video console. 176f1387130SSimon Glass 1771d5a6968Shuang linFor evb_rk3036 board: 178717f8845SJeffy Chen ./evb-rk3036/tools/mkimage -n rk3036 -T rksd -d evb-rk3036/spl/u-boot-spl.bin out && \ 1791d5a6968Shuang lin cat evb-rk3036/u-boot-dtb.bin >> out && \ 1801d5a6968Shuang lin sudo dd if=out of=/dev/sdc seek=64 1811d5a6968Shuang lin 1821d5a6968Shuang linNote: rk3036 SDMMC and debug uart use the same iomux, so if you boot from SD, the 1831d5a6968Shuang lin debug uart must be disabled 184adfb2bfeSSimon Glass 185f46b859bSHeiko Stübner 186532cb7f5SJagan TekiBooting from an SD card on RK3288 with TPL 187532cb7f5SJagan Teki========================================== 188532cb7f5SJagan Teki 189532cb7f5SJagan TekiSince the size of SPL can't be exceeded 0x8000 bytes in RK3288, it is not possible add 190532cb7f5SJagan Tekinew SPL features like Falcon mode or etc. 191532cb7f5SJagan Teki 192532cb7f5SJagan TekiSo introduce TPL so-that adding new features to SPL is possible because now TPL should 193532cb7f5SJagan Tekirun minimal with code like DDR, clock etc and rest of new features in SPL. 194532cb7f5SJagan Teki 195532cb7f5SJagan TekiAs of now TPL is added on Vyasa-RK3288 board. 196532cb7f5SJagan Teki 197532cb7f5SJagan TekiTo write an image that boots from an SD card (assumed to be /dev/mmcblk0): 198532cb7f5SJagan Teki 199532cb7f5SJagan Teki ./tools/mkimage -n rk3288 -T rksd -d ./tpl/u-boot-tpl.bin out && 200532cb7f5SJagan Teki cat ./spl/u-boot-spl-dtb.bin >> out && 201532cb7f5SJagan Teki sudo dd if=out of=/dev/mmcblk0 seek=64 && 202d80599e8SJagan Teki sudo dd if=u-boot-dtb.img of=/dev/mmcblk0 seek=16384 203532cb7f5SJagan Teki 204f46b859bSHeiko StübnerBooting from an SD card on RK3188 205f46b859bSHeiko Stübner================================= 206f46b859bSHeiko Stübner 207f46b859bSHeiko StübnerFor rk3188 boards the general storage onto the card stays the same as 208f46b859bSHeiko Stübnerdescribed above, but the image creation needs a bit more care. 209f46b859bSHeiko Stübner 210f46b859bSHeiko StübnerThe bootrom of rk3188 expects to find a small 1kb loader which returns 211f46b859bSHeiko Stübnercontrol to the bootrom, after which it will load the real loader, which 2124d9253fbSPhilipp Tomsichcan then be up to 29kb in size and does the regular ddr init. This is 2134d9253fbSPhilipp Tomsichhandled by a single image (built as the SPL stage) that tests whether 2144d9253fbSPhilipp Tomsichit is handled for the first or second time via code executed from the 2154d9253fbSPhilipp Tomsichboot0-hook. 216f46b859bSHeiko Stübner 217f46b859bSHeiko StübnerAdditionally the rk3188 requires everything the bootrom loads to be 218f46b859bSHeiko Stübnerrc4-encrypted. Except for the very first stage the bootrom always reads 219f46b859bSHeiko Stübnerand decodes 2kb pages, so files should be sized accordingly. 220f46b859bSHeiko Stübner 221f46b859bSHeiko Stübner# copy tpl, pad to 1020 bytes and append spl 2224d9253fbSPhilipp Tomsichtools/mkimage -n rk3188 -T rksd -d spl/u-boot-spl.bin out 223f46b859bSHeiko Stübner 224f46b859bSHeiko Stübner# truncate, encode and append u-boot.bin 225f46b859bSHeiko Stübnertruncate -s %2048 u-boot.bin 226f46b859bSHeiko Stübnercat u-boot.bin | split -b 512 --filter='openssl rc4 -K 7C4E0304550509072D2C7B38170D1711' >> out 227f46b859bSHeiko Stübner 228f46b859bSHeiko Stübner 229a16e2e06SXu ZiyuanUsing fastboot on rk3288 230a16e2e06SXu Ziyuan======================== 231a16e2e06SXu Ziyuan- Write GPT partition layout to mmc device which fastboot want to use it to 232a16e2e06SXu Ziyuanstore the image 233a16e2e06SXu Ziyuan 234a16e2e06SXu Ziyuan => gpt write mmc 1 $partitions 235a16e2e06SXu Ziyuan 236a16e2e06SXu Ziyuan- Invoke fastboot command to prepare 237a16e2e06SXu Ziyuan 238a16e2e06SXu Ziyuan => fastboot 1 239a16e2e06SXu Ziyuan 240a16e2e06SXu Ziyuan- Start fastboot request on PC 241a16e2e06SXu Ziyuan 242a16e2e06SXu Ziyuan fastboot -i 0x2207 flash loader evb-rk3288/spl/u-boot-spl-dtb.bin 243a16e2e06SXu Ziyuan 244a16e2e06SXu ZiyuanYou should see something like: 245a16e2e06SXu Ziyuan 246a16e2e06SXu Ziyuan => fastboot 1 247a16e2e06SXu Ziyuan WARNING: unknown variable: partition-type:loader 248a16e2e06SXu Ziyuan Starting download of 357796 bytes 249a16e2e06SXu Ziyuan .. 250a16e2e06SXu Ziyuan downloading of 357796 bytes finished 251a16e2e06SXu Ziyuan Flashing Raw Image 252a16e2e06SXu Ziyuan ........ wrote 357888 bytes to 'loader' 253a16e2e06SXu Ziyuan 254adfb2bfeSSimon GlassBooting from SPI 255adfb2bfeSSimon Glass================ 256adfb2bfeSSimon Glass 257*9e92116bSSimon GlassTo write an image that boots from SPI flash (e.g. for the Haier Chromebook or 258*9e92116bSSimon GlassBob): 259adfb2bfeSSimon Glass 260dd8e4290SSimon Glass ./chromebook_jerry/tools/mkimage -n rk3288 -T rkspi \ 261dd8e4290SSimon Glass -d chromebook_jerry/spl/u-boot-spl-dtb.bin spl.bin && \ 262dd8e4290SSimon Glass dd if=spl.bin of=spl-out.bin bs=128K conv=sync && \ 263dd8e4290SSimon Glass cat spl-out.bin chromebook_jerry/u-boot-dtb.img >out.bin && \ 264adfb2bfeSSimon Glass dd if=out.bin of=out.bin.pad bs=4M conv=sync 265adfb2bfeSSimon Glass 266adfb2bfeSSimon GlassThis converts the SPL image to the required SPI format by adding the Rockchip 2676cecc2b5SSimon Glassheader and skipping every second 2KB block. Then the U-Boot image is written at 268adfb2bfeSSimon Glassoffset 128KB and the whole image is padded to 4MB which is the SPI flash size. 269adfb2bfeSSimon GlassThe position of U-Boot is controlled with this setting in U-Boot: 270adfb2bfeSSimon Glass 271adfb2bfeSSimon Glass #define CONFIG_SYS_SPI_U_BOOT_OFFS (128 << 10) 272adfb2bfeSSimon Glass 273adfb2bfeSSimon GlassIf you have a Dediprog em100pro connected then you can write the image with: 274adfb2bfeSSimon Glass 275adfb2bfeSSimon Glass sudo em100 -s -c GD25LQ32 -d out.bin.pad -r 276adfb2bfeSSimon Glass 277adfb2bfeSSimon GlassWhen booting you should see something like: 278adfb2bfeSSimon Glass 279adfb2bfeSSimon Glass U-Boot SPL 2015.07-rc2-00215-g9a58220-dirty (Jun 23 2015 - 12:11:32) 280adfb2bfeSSimon Glass 281adfb2bfeSSimon Glass 282adfb2bfeSSimon Glass U-Boot 2015.07-rc2-00215-g9a58220-dirty (Jun 23 2015 - 12:11:32 -0600) 283adfb2bfeSSimon Glass 284adfb2bfeSSimon Glass Model: Google Jerry 285adfb2bfeSSimon Glass DRAM: 2 GiB 286adfb2bfeSSimon Glass MMC: 287adfb2bfeSSimon Glass Using default environment 288adfb2bfeSSimon Glass 289adfb2bfeSSimon Glass In: serial@ff690000 290adfb2bfeSSimon Glass Out: serial@ff690000 291adfb2bfeSSimon Glass Err: serial@ff690000 292adfb2bfeSSimon Glass => 293adfb2bfeSSimon Glass 294adfb2bfeSSimon GlassFuture work 295adfb2bfeSSimon Glass=========== 296adfb2bfeSSimon Glass 297adfb2bfeSSimon GlassImmediate priorities are: 298adfb2bfeSSimon Glass 299adfb2bfeSSimon Glass- USB host 300adfb2bfeSSimon Glass- USB device 301f1387130SSimon Glass- Run CPU at full speed (code exists but we only see ~60 DMIPS maximum) 302adfb2bfeSSimon Glass- NAND flash 303adfb2bfeSSimon Glass- Boot U-Boot proper over USB OTG (at present only SPL works) 304adfb2bfeSSimon Glass 305adfb2bfeSSimon Glass 306adfb2bfeSSimon GlassDevelopment Notes 307adfb2bfeSSimon Glass================= 308adfb2bfeSSimon Glass 309adfb2bfeSSimon GlassThere are plenty of patches in the links below to help with this work. 310adfb2bfeSSimon Glass 311adfb2bfeSSimon Glass[1] https://github.com/rkchrome/uboot.git 312adfb2bfeSSimon Glass[2] https://github.com/linux-rockchip/u-boot-rockchip.git branch u-boot-rk3288 313adfb2bfeSSimon Glass[3] https://github.com/linux-rockchip/rkflashtool.git 314adfb2bfeSSimon Glass[4] http://wiki.t-firefly.com/index.php/Firefly-RK3288/Serial_debug/en 315adfb2bfeSSimon Glass 316adfb2bfeSSimon Glassrkimage 317adfb2bfeSSimon Glass------- 318adfb2bfeSSimon Glass 319adfb2bfeSSimon Glassrkimage.c produces an SPL image suitable for sending directly to the boot ROM 320adfb2bfeSSimon Glassover USB OTG. This is a very simple format - just the string RK32 (as 4 bytes) 321adfb2bfeSSimon Glassfollowed by u-boot-spl-dtb.bin. 322adfb2bfeSSimon Glass 323adfb2bfeSSimon GlassThe boot ROM loads image to 0xff704000 which is in the internal SRAM. The SRAM 324adfb2bfeSSimon Glassstarts at 0xff700000 and extends to 0xff718000 where we put the stack. 325adfb2bfeSSimon Glass 326adfb2bfeSSimon Glassrksd 327adfb2bfeSSimon Glass---- 328adfb2bfeSSimon Glass 329adfb2bfeSSimon Glassrksd.c produces an image consisting of 32KB of empty space, a header and 330adfb2bfeSSimon Glassu-boot-spl-dtb.bin. The header is defined by 'struct header0_info' although 331adfb2bfeSSimon Glassmost of the fields are unused by U-Boot. We just need to specify the 332adfb2bfeSSimon Glasssignature, a flag and the block offset and size of the SPL image. 333adfb2bfeSSimon Glass 334adfb2bfeSSimon GlassThe header occupies a single block but we pad it out to 4 blocks. The header 335adfb2bfeSSimon Glassis encoding using RC4 with the key 7c4e0304550509072d2c7b38170d1711. The SPL 336adfb2bfeSSimon Glassimage can be encoded too but we don't do that. 337adfb2bfeSSimon Glass 338adfb2bfeSSimon GlassThe maximum size of u-boot-spl-dtb.bin which the boot ROM will read is 32KB, 339adfb2bfeSSimon Glassor 0x40 blocks. This is a severe and annoying limitation. There may be a way 340adfb2bfeSSimon Glassaround this limitation, since there is plenty of SRAM, but at present the 341adfb2bfeSSimon Glassboard refuses to boot if this limit is exceeded. 342adfb2bfeSSimon Glass 343adfb2bfeSSimon GlassThe image produced is padded up to a block boundary (512 bytes). It should be 344adfb2bfeSSimon Glasswritten to the start of an SD card using dd. 345adfb2bfeSSimon Glass 346adfb2bfeSSimon GlassSince this image is set to load U-Boot from the SD card at block offset, 347adfb2bfeSSimon GlassCONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR, dd should be used to write 348adfb2bfeSSimon Glassu-boot-dtb.img to the SD card at that offset. See above for instructions. 349adfb2bfeSSimon Glass 350adfb2bfeSSimon Glassrkspi 351adfb2bfeSSimon Glass----- 352adfb2bfeSSimon Glass 353adfb2bfeSSimon Glassrkspi.c produces an image consisting of a header and u-boot-spl-dtb.bin. The 354adfb2bfeSSimon Glassresulting image is then spread out so that only the first 2KB of each 4KB 355adfb2bfeSSimon Glasssector is used. The header is the same as with rksd and the maximum size is 356adfb2bfeSSimon Glassalso 32KB (before spreading). The image should be written to the start of 357adfb2bfeSSimon GlassSPI flash. 358adfb2bfeSSimon Glass 359adfb2bfeSSimon GlassSee above for instructions on how to write a SPI image. 360adfb2bfeSSimon Glass 361002c634cSSimon Glassrkmux.py 362002c634cSSimon Glass-------- 363002c634cSSimon Glass 364002c634cSSimon GlassYou can use this script to create #defines for SoC register access. See the 365002c634cSSimon Glassscript for usage. 366002c634cSSimon Glass 367adfb2bfeSSimon Glass 368adfb2bfeSSimon GlassDevice tree and driver model 369adfb2bfeSSimon Glass---------------------------- 370adfb2bfeSSimon Glass 371adfb2bfeSSimon GlassWhere possible driver model is used to provide a structure to the 372adfb2bfeSSimon Glassfunctionality. Device tree is used for configuration. However these have an 373adfb2bfeSSimon Glassoverhead and in SPL with a 32KB size limit some shortcuts have been taken. 374adfb2bfeSSimon GlassIn general all Rockchip drivers should use these features, with SPL-specific 375adfb2bfeSSimon Glassmodifications where required. 376adfb2bfeSSimon Glass 3773f3e1e33SJacob ChenGPT partition layout 3783f3e1e33SJacob Chen---------------------------- 3793f3e1e33SJacob Chen 3803f3e1e33SJacob ChenRockchip use a unified GPT partition layout in open source support. 3813f3e1e33SJacob ChenWith this GPT partition layout, uboot can be compatilbe with other components, 3823f3e1e33SJacob Chenlike miniloader, trusted-os, arm-trust-firmware. 3833f3e1e33SJacob Chen 3843f3e1e33SJacob ChenThere are some documents about partitions in the links below. 3853f3e1e33SJacob Chenhttp://rockchip.wikidot.com/partitions 386adfb2bfeSSimon Glass 387adfb2bfeSSimon Glass-- 388adfb2bfeSSimon GlassSimon Glass <sjg@chromium.org> 389adfb2bfeSSimon Glass24 June 2015 390