Diff for /wikisrc/ports/evbarm/odroid-c1.mdwn between versions 1.1 and 1.29

version 1.1, 2015/02/27 17:58:34 version 1.29, 2017/11/22 14:35:02
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 [[!meta title="NetBSD/evbarm on Hardkernel ODROID-C1"]]  [[!meta title="NetBSD/evbarm on Hardkernel ODROID-C1 and ODROID-C1+"]]
   
   [ODROID-C1](http://www.hardkernel.com/main/products/prdt_info.php?g_code=G141578608433&tab_idx=1) was a $35 quad-core SBC from Hardkernel. ODROID-C1 support was introduced in NetBSD 7.0.  It has been succeeded by the [ODROID-C1+](http://www.hardkernel.com/main/products/prdt_info.php?g_code=G143703355573), which is supported by the same NetBSD kernel.
   
 [[!toc levels=2]]  [[!toc levels=2]]
   
   # Supported hardware
    - CPU: Cortex-A5: Amlogic S805 (4-core) at 1.5GHz
      - CPU frequency scaling is supported with machdep.cpu sysctl tree
      - SMP supported
      - PL310 L2 cache controller
    - GIC
    - A5 global timer
    - Watchdog timer
    - "SDHC" and "SDIO" SD/MMC controllers (DMA)
    - Serial console
    - Framebuffer console
    - USB host (OTG)
    - Gigabit Ethernet (GMAC)
      - RTL8211F PHY
    - Hardware random number generator
    - RTC
    - GPIO
   
   # TODO
    - USB device mode
    - IR receiver
    - I2C
    - Audio
   
   # Installation (NetBSD 8.0 and later)
   
   * Start with an ARMv7 image from *evbarm-earmv7hf/binary/gzimg/* such as *armv7.img*
   * Build U-Boot for ODROID-C1 <https://github.com/hardkernel/u-boot/tree/odroidc-v2011.03>
     * Pre-built binaries here: <http://ftp.netbsd.org/pub/NetBSD/misc/jmcneill/odroidc1/u-boot-odroidc-v2011.03-20150308.tar.gz>
   * Write the bootloader to the empty space at the start of the base image:
   [[!template  id=programlisting text="""
   # dd if=bl1.bin.hardkernel of=armv7.img bs=1 count=442 conv=notrunc
   # dd if=bl1.bin.hardkernel of=armv7.img bs=512 skip=1 seek=1 conv=notrunc
   # dd if=u-boot.bin of=armv7.img bs=512 seek=64 conv=notrunc
   """]]
   * Write the image to an SD card.
   * Edit *boot.ini* on the MS-DOS partition. Note that the default boot.ini has `console=fb` in `bootargs`, which you should remove if you want serial console:
   [[!template  id=programlisting text="""
   ODROIDC-UBOOT-CONFIG
   
   setenv bootargs "root=ld0a awge0.mac-address=${ethaddr} console=fb"
   setenv bootcmd "fatload mmc 0:1 0x21000000 netbsd-ODROID-C1.ub; bootm 0x21000000"
   run bootcmd
   """]] 
   
   # Installation (NetBSD 7.0/7.1)
   
   * Start with an ARMv7 image from *evbarm-earmv7hf/binary/gzimg/* such as *armv7.img*
   * Build U-Boot for ODROID-C1 <https://github.com/hardkernel/u-boot/tree/odroidc-v2011.03>
     * Pre-built binaries here: <http://ftp.netbsd.org/pub/NetBSD/misc/jmcneill/odroidc1/u-boot-odroidc-v2011.03-20150308.tar.gz>
   * Note the location and size of the FFS partition in the *armv7.img* disklabel:
   [[!template  id=programlisting text="""
   # $TOOLDIR/bin/nbdisklabel -M evbarm -B le armv7.img
   ...
   8 partitions:
   #        size    offset     fstype [fsize bsize cpg/sgs]
    a:   1359312    385024     4.2BSD      0     0     0  # (Cyl.    188 -    851*)
    b:    262144    122880       swap                     # (Cyl.     60 -    187)
    c:   1744336         0     unused      0     0        # (Cyl.      0 -    851*)
    d:   1744336         0     unused      0     0        # (Cyl.      0 -    851*)
    e:    114688      8192      MSDOS                     # (Cyl.      4 -     59)
   """]]
   * Write the bootloader to the empty space at the start of the base image:
   [[!template  id=programlisting text="""
   # dd if=bl1.bin.hardkernel of=armv7.img bs=1 count=442 conv=notrunc
   # dd if=bl1.bin.hardkernel of=armv7.img bs=512 skip=1 seek=1 conv=notrunc
   # dd if=u-boot.bin of=armv7.img bs=512 seek=64 conv=notrunc
   """]]
   * Since the bootloader has overwritten the disklabel, we need to re-add partition "a" from the disklabel to the MBR partition table:
   [[!template  id=programlisting text="""
   # $TOOLDIR/bin/armv7--netbsdelf-eabihf-fdisk -u armv7.img
   ...
   Which partition do you want to change?: [none] 1
   The data for partition 1 is:
   <UNUSED>
   sysid: [0..255 default: 169] 
   start: [0..109cyl default: 63, 0cyl, 0MB] 385024
   size: [0..85cyl default: 1359312, 85cyl, 664MB] 1359312
   ...
   Which partition do you want to change?: [none] 
   ...
   Should we write new partition table? [n] y
   """]]
   * Write the image to an SD card.
   * Edit *boot.ini* on the MS-DOS partition. Note that the default boot.ini has `console=fb` in `bootargs`, which you should remove if you want serial console:
   [[!template  id=programlisting text="""
   ODROIDC-UBOOT-CONFIG
   
   setenv bootargs "root=ld0f awge0.mac-address=${ethaddr} console=fb"
   setenv bootcmd "fatload mmc 0:1 0x21000000 netbsd.ub; bootm 0x21000000"
   run bootcmd
   """]] 
   
   * On first boot, it will stop because of the wrong device in /etc/fstab. Take this opportunity to grow the root file-system:
   [[!template  id=programlisting text="""
   # fdisk -u ld0
   ...
   Which partition do you want to change?: [none] 1
   The data for partition 1 is:
   NetBSD (sysid 169)
       start 385024, size 1359312 (664 MB, Cyls 23/246/32-108/147/55)
           PBR is not bootable: All bytes are identical (0x00)
   sysid: [0..255 default: 169]
   start: [0..966cyl default: 385024, 24cyl, 188MB]
   size: [0..942cyl default: 1359312, 85cyl, 664MB] $
   ...
   Which partition do you want to change?: [none]
   ...
   Should we write new partition table? [n] y
   # resize_ffs -y /dev/rld0f
   # reboot
   """]]
   * Next boot, create a new /etc/fstab:
   [[!template  id=programlisting text="""
   # mount -u -o rw /dev/ld0f /
   # cat > /etc/fstab << EOF
   /dev/ld0f       /               ffs     rw      1 1
   /dev/ld0e       /boot           msdos   rw      1 1
   kernfs          /kern           kernfs  rw
   ptyfs           /dev/pts        ptyfs   rw
   procfs          /proc           procfs  rw
   tmpfs           /var/shm        tmpfs   rw,-m1777,-sram%25
   EOF
   # reboot
   """]]
   
   # HDMI
   
   ## Framebuffer console
   
   Simply add **console=fb** to the *bootargs* variable in *boot.ini*.
   
   ## Video mode
   
   HDMI video mode can be selected in U-Boot with the *video* command, e.g.:
   
   [[!template  id=programlisting text="""
   odroidc#video dev open 1080P
   """]]
   
   To make this change permanent, add it to the *bootcmd* variable in *boot.ini*:
   
   [[!template  id=programlisting text="""
   setenv bootcmd "video dev open 1080P; fatload mmc 0:1 0x21000000 netbsd.ub; bootm 0x21000000"
   """]]
   
   ## 16 or 24 bpp?
   
   ODROID-C1 defaults to 16bpp. If you want to try 24bpp, add **fb.depth=24** to the kernel cmdline options in *boot.ini*. There are some issues with 24bpp mode and Xorg; see <http://gnats.netbsd.org/49812>.
   
   ## Overscan compensation
   
   If you have ODROID-C1 plugged into a TV, the edges of the screen may not be visible. You can scale down the framebuffer console with the **hw.genfb0.scale** sysctl, e.g.:
   
   [[!template  id=programlisting text="""
   # sysctl -w hw.genfb0.scale=95
   """]]
   
   Setting *scale* to 100 disables scaling, any other value enables the scaler. Values between 10 and 100 are allowed.
   
   To set this value at boot, you can add **fb.scale=95** to the kernel cmdline options in *boot.ini*.
   
   # SYS_LED
   
   The blue SYS_LED on the board is wired to GPIOAO_13. To control the LED from userland, set **gpio=YES** in rc.conf and add this to */etc/gpio.conf*:
   
   [[!template  id=programlisting text="""
   gpio4 13 set out sys_led
   """]]
   
   After rebooting, the LED state can be controlled with [[!template id=man name="gpioctl" section="8"]].
   
   [[!template  id=programlisting text="""
   # turn the light on
   gpioctl gpio4 sys_led on
   
   # turn the light off
   gpioctl gpio4 sys_led off
   
   # toggle the light state
   gpioctl gpio4 sys_led toggle
   """]]
   
   # U-Boot Environment
   
   To read/write U-Boot environment variables from NetBSD, download and compile the following program: <http://ftp.netbsd.org/pub/NetBSD/misc/jmcneill/odroidc1/uenv.c>
   
   # Automatically booting a backup kernel
   
   *These instructions assume the kernels live on eMMC. Adjust devices accordingly for SD card setup.*
   
   To setup an ODROID-C1 to fall back to a recovery kernel in the event of a boot failure, install the recovery kernel as /boot/onetbsd.ub.
   
   Create /boot/boot.ini as follows:
   [[!template  id=programlisting text="""
   ODROIDC-UBOOT-CONFIG
   setenv bootargs "root=ld0f awge0.mac-address=${ethaddr}"
   fatload mmc 0:1 0x22000000 boot.scr
   source 0x22000000
   """]]
   
   Create /boot/boot.txt:
   [[!template  id=programlisting text="""
   # regenerate with:
   #  mkubootimage -A arm -C none -O netbsd -T script -a 0 -n "NetBSD/odroidc1 boot" boot.txt boot.scr
   
   setenv rescue_kernel "onetbsd.ub"
   setenv kernel "netbsd.ub"
   
   if test ${boot_rescue} = false; then
     setenv boot_rescue true
     saveenv
     fatload mmc 0:1 0x21000000 ${kernel}
     mw.l c1109900 0f08ffff        # arm watchdog
     bootm 0x21000000
   else
     fatload mmc 0:1 0x21000000 ${rescue_kernel}
     bootm 0x21000000
   fi
   """]]
   
   Generate boot.scr from boot.txt:
   [[!template  id=programlisting text="""
   mkubootimage -A arm -C none -O netbsd -T script -a 0 -n "NetBSD/odroidc1 boot" /boot/boot.txt /boot/boot.scr
   """]]
   
   Install the **uenv** tool from above and add the following to root's crontab:
   [[!template  id=programlisting text="""
   @reboot                                 /usr/local/sbin/uenv ld0 boot_rescue false
   """]]
   
   # Documentation
   
   Amlogic S805 datasheet: <http://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf>
   
 # ODROID-C1 UART pins  # ODROID-C1 UART pins
   
 From [ODROID Forum](http://forum.odroid.com/viewtopic.php?f=115&t=7684):  From [ODROID Forum](http://forum.odroid.com/viewtopic.php?f=115&t=7684):
Line 16  From [ODROID Forum](http://forum.odroid. Line 253  From [ODROID Forum](http://forum.odroid.
   
 3.3V LVTTL  3.3V LVTTL
 """]]  """]]
   

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