File:  [NetBSD Developer Wiki] / wikisrc / ports / evbarm / allwinner.mdwn
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Sat Nov 15 13:44:42 2014 UTC (7 years, 6 months ago) by wiki
Branches: MAIN
CVS tags: HEAD
web commit by jmcneill: IR works on A31 now

    1: [[!meta title="NetBSD/evbarm on Allwinner Technology SoCs"]]
    2: 
    3: [[!toc levels=2]]
    4: 
    5: # Supported boards
    6:  - [Banana Pi](http://www.bananapi.org/p/product.html) (BPI)
    7:  - Cubieboard, Cubieboard 2 (CUBIEBOARD)
    8:  - Cubietruck (CUBIETRUCK)
    9:  - [Merrii Hummingbird A31](http://www.merrii.com/en/pla_d.asp?id=172) (HUMMINGBIRD_A31)
   10: 
   11: # Supported hardware
   12:  - SoCs
   13:    - Cortex-A8: A10
   14:    - Cortex-A7: A20 (2-core), A31 (4-core)
   15:  - SD/MMC controller (DMA)
   16:  - DMA controller
   17:  - GPIO
   18:    - Configuration using FEX scripts is supported
   19:  - UART
   20:  - I2C
   21:  - P2WI (A31)
   22:  - PMU
   23:    - AXP209 (A20)
   24:    - AXP221 (A31)
   25:  - Watchdog timer
   26:  - RTC
   27:  - Audio codec
   28:  - USB host
   29:    - OHCI
   30:    - EHCI
   31:    - OTG (not yet working on A31)
   32:  - SATA (A10/A20)
   33:  - Gigabit Ethernet (GMAC)
   34:  - HDMI (A20/A31)
   35:    - DDC / EDID mode detection
   36:    - Audio support
   37:  - Framebuffer
   38:  - IR (A31)
   39: 
   40: # TODO
   41:  - OTG (A31)
   42:  - USB device mode
   43:  - Bluetooth / WiFi (Cubietruck, Hummingbird A31)
   44:  - 3G (Hummingbird A31)
   45:  - SD/MMC UHS-I support (needs sdmmc(4) changes)
   46:  - TV input (Hummingbird A31)
   47:  - NAND
   48:  - Fast Ethernet (EMAC)
   49:  - IR (A20)
   50: 
   51: # Installation
   52: 
   53: ## A10 / A20 based boards
   54: 
   55: * Start with an ARMv7 image from *evbarm-earmv7hf/binary/gzimg/* such as *beaglebone.img*
   56: * Download a U-Boot build for your board from the linux-sunxi web site <http://dl.linux-sunxi.org/nightly/u-boot-sunxi/u-boot-sunxi/u-boot-sunxi-latest/>
   57: * Write the *u-boot-sunxi-with-spl.bin* loader to the base image:
   58: [[!template  id=programlisting text="""
   59: # dd if=u-boot-sunxi-with-spl.bin of=beaglebone.img bs=1k seek=8 conv=notrunc
   60: """]]
   61: * Write the image to an SD card.
   62: * Copy the kernel (netbsd.ub) for your board to the root of the MS-DOS partition.
   63: * Create or edit uEnv.txt on the MS-DOS partition:
   64: [[!template  id=programlisting text="""
   65: bootargs=root=ld0a
   66: uenvcmd=mmc dev 0; mmc rescan; fatload mmc 0:1 82000000 netbsd.ub; bootm 82000000
   67: """]]
   68: 
   69: ## A31 based boards
   70: 
   71: TBD.
   72: 
   73: # Big (endian) fun
   74: 
   75: You can run this boards with a little endian (this is the default and implied by above install instructions)
   76: or with a big endian kernel and userland. However, kernel and userland endianness needs to match.
   77: 
   78: To build a big endian release (or sets) use 
   79: [[!template  id=programlisting text="""
   80: ./build.sh -m evbearmv7hf-eb 
   81: """]]
   82: where -eb means endianness big, hf is hardware floating point support, and earm is the modern "extended" ABI for ARM CPUs, and finally v7 is version 7 of the supported instruction set.
   83: 
   84: # FEX scripts
   85: 
   86: Board configuration scripts can be found here: <https://github.com/linux-sunxi/sunxi-boards/blob/master/sys_config>. You can compile them with the "fex2bin" tool found here: <https://github.com/linux-sunxi/sunxi-tools>.
   87: 
   88: To use, copy the compiled FEX to your MS-DOS partition, load it with U-Boot, and then tell the kernel where to find it with the "sysconfig=" boot option. For example, uEnv.txt on a Cubieboard2 might look like this:
   89: 
   90: [[!template  id=programlisting text="""
   91: bootargs=root=ld0a sysconfig=0x43000000
   92: uenvcmd=mmc dev 0; mmc rescan; fatload mmc 0:1 43000000 cubieboard2.bin; fatload mmc 0:1 82000000 netbsd.ub; bootm 82000000
   93: """]]
   94: 
   95: Some pre-compiled .bin files can be found here: <http://ftp.netbsd.org/pub/NetBSD/misc/jmcneill/allwinner/fex/>
   96: 
   97: # Framebuffer console
   98: 
   99: To use HDMI for the console device, add *console=fb* to bootargs in uEnv.txt.
  100: 
  101: If the connected display does not let you disable overscan, you can add a margin to the framebuffer by with the *fb.margin* bootargs option. For example, to set a 25-pixel margin around the screen, add *fb.margin=25* to uEnv.txt
  102: 
  103: # HDMI audio
  104: 
  105: The default audio device is the analog audio codec. To change the default device, use the *audiocfg* command:
  106: 
  107: [[!template  id=programlisting text="""
  108: a31# audiocfg list
  109: 0: [*] audio0 @ awinac0: Allwinner CODEC A31, 2 playback channels
  110: 1: [ ] audio1 @ awinhdmiaudio0: Allwinner HDMI 1.4, 2 playback channels
  111: a31# audiocfg default 1
  112: setting default audio device to audio1
  113: a31# audiocfg list
  114: 0: [ ] audio0 @ awinac0: Allwinner CODEC A31, 2 playback channels
  115: 1: [*] audio1 @ awinhdmiaudio0: Allwinner HDMI 1.4, 2 playback channels
  116: """]]
  117: 
  118: # Board specific notes
  119: 
  120: ## Merrii Hummingbird A31
  121: 
  122: There doesn't appear to be a meaningful way to generate a MAC address on these boards. U-Boot from the A31 SDK and from the u-boot-sunxi tree both lack GMAC support, and the Security ID registers (at 0x01c23800) appear to be empty.
  123: 
  124: To overcome this, you can specify your own MAC address in *uEnv.txt*:
  125: [[!template  id=programlisting text="""
  126: bootargs=root=ld0a awge0.mac-address=02:a0:3d:88:1a:1e
  127: """]]

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