Annotation of wikisrc/ports/evbarm/odroid-c1.mdwn, revision 1.34

1.22      wiki        1: [[!meta title="NetBSD/evbarm on Hardkernel ODROID-C1 and ODROID-C1+"]]
1.1       wiki        2: 
1.30      snj         3: [ODROID-C1](https://www.hardkernel.com/shop/odroid-c1-2/) 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+](https://www.hardkernel.com/shop/odroid-c1/), which is supported by the same NetBSD kernel.
1.13      wiki        4: 
1.1       wiki        5: [[!toc levels=2]]
                      6: 
1.2       wiki        7: # Supported hardware
1.6       wiki        8:  - CPU: Cortex-A5: Amlogic S805 (4-core) at 1.5GHz
1.2       wiki        9:    - CPU frequency scaling is supported with machdep.cpu sysctl tree
                     10:    - SMP supported
                     11:    - PL310 L2 cache controller
                     12:  - GIC
                     13:  - A5 global timer
1.23      wiki       14:  - Watchdog timer
1.16      wiki       15:  - "SDHC" and "SDIO" SD/MMC controllers (DMA)
1.2       wiki       16:  - Serial console
1.7       wiki       17:  - Framebuffer console
1.2       wiki       18:  - USB host (OTG)
                     19:  - Gigabit Ethernet (GMAC)
                     20:    - RTL8211F PHY
                     21:  - Hardware random number generator
1.11      wiki       22:  - RTC
1.15      wiki       23:  - GPIO
1.2       wiki       24: 
                     25: # TODO
                     26:  - USB device mode
                     27:  - IR receiver
                     28:  - I2C
1.7       wiki       29:  - Audio
1.2       wiki       30: 
1.29      wiki       31: # Installation (NetBSD 8.0 and later)
1.28      jmcneill   32: 
1.31      wiki       33: * Start with an ARMv7 image from *evbarm-earmv7hf/binary/gzimg/* such as *armv7.img*, the latest is [[here|https://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/latest/evbarm-earmv7hf/binary/gzimg/armv7.img]].
1.34    ! wiki       34: * Build U-Boot for ODROID-C1 <https://github.com/jaredmcneill/u-boot-odroid>
1.32      wiki       35:   * Pre-built binaries here:
                     36:    <http://ftp.netbsd.org/pub/NetBSD/misc/jmcneill/odroidc1/u-boot-odroidc-v2011.03-20150308.tar.gz>
                     37:    <http://www.netbsd.org/~jmcneill/u-boot.bin.odroidc1>
1.28      jmcneill   38: * Write the bootloader to the empty space at the start of the base image:
                     39: [[!template  id=programlisting text="""
                     40: # dd if=bl1.bin.hardkernel of=armv7.img bs=1 count=442 conv=notrunc
                     41: # dd if=bl1.bin.hardkernel of=armv7.img bs=512 skip=1 seek=1 conv=notrunc
1.32      wiki       42: # dd if=u-boot.bin.odroidc1 of=armv7.img bs=512 seek=64 conv=notrunc
1.28      jmcneill   43: """]]
                     44: * Write the image to an SD card.
1.33      wiki       45: * Tested 2021-02-19 with NetBSD-current, christos
1.28      jmcneill   46: 
                     47: # Installation (NetBSD 7.0/7.1)
1.2       wiki       48: 
1.20      wiki       49: * Start with an ARMv7 image from *evbarm-earmv7hf/binary/gzimg/* such as *armv7.img*
1.2       wiki       50: * Build U-Boot for ODROID-C1 <https://github.com/hardkernel/u-boot/tree/odroidc-v2011.03>
1.3       wiki       51:   * Pre-built binaries here: <http://ftp.netbsd.org/pub/NetBSD/misc/jmcneill/odroidc1/u-boot-odroidc-v2011.03-20150308.tar.gz>
1.27      sevan      52: * Note the location and size of the FFS partition in the *armv7.img* disklabel:
1.4       wiki       53: [[!template  id=programlisting text="""
1.20      wiki       54: # $TOOLDIR/bin/nbdisklabel -M evbarm -B le armv7.img
1.4       wiki       55: ...
                     56: 8 partitions:
                     57: #        size    offset     fstype [fsize bsize cpg/sgs]
                     58:  a:   1359312    385024     4.2BSD      0     0     0  # (Cyl.    188 -    851*)
                     59:  b:    262144    122880       swap                     # (Cyl.     60 -    187)
                     60:  c:   1744336         0     unused      0     0        # (Cyl.      0 -    851*)
                     61:  d:   1744336         0     unused      0     0        # (Cyl.      0 -    851*)
                     62:  e:    114688      8192      MSDOS                     # (Cyl.      4 -     59)
                     63: """]]
1.2       wiki       64: * Write the bootloader to the empty space at the start of the base image:
                     65: [[!template  id=programlisting text="""
1.20      wiki       66: # dd if=bl1.bin.hardkernel of=armv7.img bs=1 count=442 conv=notrunc
                     67: # dd if=bl1.bin.hardkernel of=armv7.img bs=512 skip=1 seek=1 conv=notrunc
                     68: # dd if=u-boot.bin of=armv7.img bs=512 seek=64 conv=notrunc
1.2       wiki       69: """]]
1.4       wiki       70: * Since the bootloader has overwritten the disklabel, we need to re-add partition "a" from the disklabel to the MBR partition table:
                     71: [[!template  id=programlisting text="""
1.20      wiki       72: # $TOOLDIR/bin/armv7--netbsdelf-eabihf-fdisk -u armv7.img
1.4       wiki       73: ...
                     74: Which partition do you want to change?: [none] 1
                     75: The data for partition 1 is:
                     76: <UNUSED>
                     77: sysid: [0..255 default: 169] 
                     78: start: [0..109cyl default: 63, 0cyl, 0MB] 385024
                     79: size: [0..85cyl default: 1359312, 85cyl, 664MB] 1359312
                     80: ...
                     81: Which partition do you want to change?: [none] 
                     82: ...
                     83: Should we write new partition table? [n] y
                     84: """]]
1.2       wiki       85: * Write the image to an SD card.
1.21      wiki       86: * Edit *boot.ini* on the MS-DOS partition. Note that the default boot.ini has `console=fb` in `bootargs`, which you should remove if you want serial console:
1.2       wiki       87: [[!template  id=programlisting text="""
                     88: ODROIDC-UBOOT-CONFIG
                     89: 
1.21      wiki       90: setenv bootargs "root=ld0f awge0.mac-address=${ethaddr} console=fb"
1.2       wiki       91: setenv bootcmd "fatload mmc 0:1 0x21000000 netbsd.ub; bootm 0x21000000"
                     92: run bootcmd
1.21      wiki       93: """]] 
                     94: 
1.5       wiki       95: * On first boot, it will stop because of the wrong device in /etc/fstab. Take this opportunity to grow the root file-system:
1.4       wiki       96: [[!template  id=programlisting text="""
                     97: # fdisk -u ld0
                     98: ...
                     99: Which partition do you want to change?: [none] 1
                    100: The data for partition 1 is:
                    101: NetBSD (sysid 169)
                    102:     start 385024, size 1359312 (664 MB, Cyls 23/246/32-108/147/55)
                    103:         PBR is not bootable: All bytes are identical (0x00)
                    104: sysid: [0..255 default: 169]
                    105: start: [0..966cyl default: 385024, 24cyl, 188MB]
                    106: size: [0..942cyl default: 1359312, 85cyl, 664MB] $
                    107: ...
                    108: Which partition do you want to change?: [none]
                    109: ...
                    110: Should we write new partition table? [n] y
                    111: # resize_ffs -y /dev/rld0f
                    112: # reboot
                    113: """]]
                    114: * Next boot, create a new /etc/fstab:
                    115: [[!template  id=programlisting text="""
                    116: # mount -u -o rw /dev/ld0f /
                    117: # cat > /etc/fstab << EOF
                    118: /dev/ld0f       /               ffs     rw      1 1
                    119: /dev/ld0e       /boot           msdos   rw      1 1
                    120: kernfs          /kern           kernfs  rw
                    121: ptyfs           /dev/pts        ptyfs   rw
                    122: procfs          /proc           procfs  rw
                    123: tmpfs           /var/shm        tmpfs   rw,-m1777,-sram%25
                    124: EOF
                    125: # reboot
                    126: """]]
1.2       wiki      127: 
1.9       wiki      128: # HDMI
                    129: 
1.10      wiki      130: ## Framebuffer console
                    131: 
                    132: Simply add **console=fb** to the *bootargs* variable in *boot.ini*.
                    133: 
1.9       wiki      134: ## Video mode
                    135: 
                    136: HDMI video mode can be selected in U-Boot with the *video* command, e.g.:
                    137: 
                    138: [[!template  id=programlisting text="""
                    139: odroidc#video dev open 1080P
                    140: """]]
                    141: 
                    142: To make this change permanent, add it to the *bootcmd* variable in *boot.ini*:
                    143: 
                    144: [[!template  id=programlisting text="""
                    145: setenv bootcmd "video dev open 1080P; fatload mmc 0:1 0x21000000 netbsd.ub; bootm 0x21000000"
                    146: """]]
                    147: 
1.14      wiki      148: ## 16 or 24 bpp?
                    149: 
                    150: 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>.
                    151: 
1.9       wiki      152: ## Overscan compensation
1.8       wiki      153: 
                    154: 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.:
                    155: 
                    156: [[!template  id=programlisting text="""
                    157: # sysctl -w hw.genfb0.scale=95
                    158: """]]
                    159: 
                    160: Setting *scale* to 100 disables scaling, any other value enables the scaler. Values between 10 and 100 are allowed.
                    161: 
                    162: To set this value at boot, you can add **fb.scale=95** to the kernel cmdline options in *boot.ini*.
                    163: 
1.15      wiki      164: # SYS_LED
                    165: 
                    166: 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*:
                    167: 
                    168: [[!template  id=programlisting text="""
                    169: gpio4 13 set out sys_led
                    170: """]]
                    171: 
                    172: After rebooting, the LED state can be controlled with [[!template id=man name="gpioctl" section="8"]].
                    173: 
                    174: [[!template  id=programlisting text="""
                    175: # turn the light on
                    176: gpioctl gpio4 sys_led on
                    177: 
                    178: # turn the light off
                    179: gpioctl gpio4 sys_led off
                    180: 
                    181: # toggle the light state
                    182: gpioctl gpio4 sys_led toggle
                    183: """]]
                    184: 
1.24      wiki      185: # U-Boot Environment
                    186: 
                    187: 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>
                    188: 
1.25      wiki      189: # Automatically booting a backup kernel
                    190: 
                    191: *These instructions assume the kernels live on eMMC. Adjust devices accordingly for SD card setup.*
                    192: 
                    193: 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.
                    194: 
                    195: Create /boot/boot.ini as follows:
                    196: [[!template  id=programlisting text="""
                    197: ODROIDC-UBOOT-CONFIG
                    198: setenv bootargs "root=ld0f awge0.mac-address=${ethaddr}"
                    199: fatload mmc 0:1 0x22000000 boot.scr
                    200: source 0x22000000
                    201: """]]
                    202: 
                    203: Create /boot/boot.txt:
                    204: [[!template  id=programlisting text="""
                    205: # regenerate with:
                    206: #  mkubootimage -A arm -C none -O netbsd -T script -a 0 -n "NetBSD/odroidc1 boot" boot.txt boot.scr
                    207: 
                    208: setenv rescue_kernel "onetbsd.ub"
                    209: setenv kernel "netbsd.ub"
                    210: 
                    211: if test ${boot_rescue} = false; then
                    212:   setenv boot_rescue true
                    213:   saveenv
                    214:   fatload mmc 0:1 0x21000000 ${kernel}
                    215:   mw.l c1109900 0f08ffff        # arm watchdog
                    216:   bootm 0x21000000
                    217: else
                    218:   fatload mmc 0:1 0x21000000 ${rescue_kernel}
                    219:   bootm 0x21000000
                    220: fi
                    221: """]]
                    222: 
                    223: Generate boot.scr from boot.txt:
                    224: [[!template  id=programlisting text="""
                    225: mkubootimage -A arm -C none -O netbsd -T script -a 0 -n "NetBSD/odroidc1 boot" /boot/boot.txt /boot/boot.scr
                    226: """]]
                    227: 
                    228: Install the **uenv** tool from above and add the following to root's crontab:
                    229: [[!template  id=programlisting text="""
                    230: @reboot                                 /usr/local/sbin/uenv ld0 boot_rescue false
                    231: """]]
                    232: 
1.12      wiki      233: # Documentation
                    234: 
                    235: Amlogic S805 datasheet: <http://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf>
                    236: 
1.1       wiki      237: # ODROID-C1 UART pins
                    238: 
                    239: From [ODROID Forum](http://forum.odroid.com/viewtopic.php?f=115&t=7684):
                    240: 
                    241: [[!template  id=programlisting text="""
                    242:  ___UART____
                    243: |Pin 4 - GND|
                    244: |Pin 3 - RXD|
                    245: |Pin 2 - TXD|
                    246: |Pin 1 - VCC|
                    247: \___________|
                    248: 
                    249: 3.3V LVTTL
                    250: """]]
1.26      leot      251: 

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