NP2150 Emulation

NP6800+-specific steps.

Create initial system image

Download upgrade.bin from NP2150升级程序V1.4.55修复包.rar from official website:
https://downloads.youxuepai.com/source/tools/#83-NP2150-240

See: qemu/create_system_image.sh

#!/bin/bash -x
src=$1 #upgrade.bin
pkg=upgrade.pkg
nand=nand_image.bin
qcow2=nand_image.qcow2

# Extract data sections from upgrade.bin
[ -f $pkg ] || ./mkpkg --type=np1000 --extract $src $pkg

# Create NAND image
# Ignore errors as it does not support ubifs file system format yet
rm -f $nand
./create_nand_image.py -s $((2*1024*1024*1024)) -p 4096 -o 128 $pkg $nand

# (Optional) Write fake serial number
./write_serial.py -p 4096 -o 128 0x00301000 "QEMU $(date -Iseconds)" $nand

# (Optional) Convert NAND image to qcow2 format
qemu-img convert -f raw -O qcow2 $nand $qcow2

Create qcow2 overlay files

Optionally create qcow2 overlay files, as snapshots, like this:

qemu-img create -f qcow2 -F qcow2 -b nand_image.qcow2 nand_overlay.qcow2

Keyboard mapping file

The gpio-matrix-keypad device includes a very basic config parser for mapping keyboard input to device matrix keyboard.

Key names can be found in qemu/qapi/ui.json,
Or use --trace gpio_matrix_keypad_event QEMU trace log option to see key events.

Create a yaml mapping file named keymap.yaml:

---
keymap:
  pin-0: "f12"      # Power button

Some dedicated pins are connected to special functions:

Pin	Function
pin-0	Power button

Note: The NP2150 keyboard is not supported yet!

Start QEMU

system_image=nand_overlay.qcow2
mmc_image=mmc_overlay.qcow2

./qemu-system-mipsel \
    -M noah_np2150 \
    -d guest_errors,unimp \
    -bios jz4740.bin \
    -parallel null \
    -serial mon:stdio \
    -global gpio-matrix-keypad.map-file=keymap.yaml \
    -spice port=5910,disable-ticketing=on \
    -display none \
    -audio spice \
    \
    -blockdev driver=file,node-name=nand_qcow2,filename=$system_image \
    -blockdev qcow2,node-name=nand,file=nand_qcow2 \
    -global ingenic-emc-nand.drive=nand \
    \
    -blockdev driver=file,node-name=mmc_qcow2,filename=$mmc_image \
    -blockdev qcow2,node-name=mmc,file=mmc_qcow2 \
    -device sd-card,spec_version=3,drive=mmc \

This starts a SPICE server at port 5910.
SPICE is used instead of VNC for remote audio support.
Here is an example spice.vv file for SPICE connection using virt-viewer (also available on Windows):

[virt-viewer]
type=spice
host=localhost
port=5910
delete-this-file=0
fullscreen=0

System upgrade

Copy segment03.bin extracted from upgrade.bin to SD card image as uImage-upgrade.

During booting, on serial port console, repeatedly hit enter to interrupt u-boot autoboot and enter u-boot command line:

NAND Secondary Program Loader

Starting U-Boot ...
start_pbat_adc ***
======================= 2020


U-Boot 1.1.6 (Jun 30 2009 - 15:41:36)

Board: Ingenic PAVO (CPU Speed 336 MHz)
DRAM:  64 MB
Flash:  0 kB
NAND:2048 MiB
*** Warning - bad CRC or NAND, using default environment

LCD Select:IO_D0=1 IO_D1=1
LCD Type:LCD_NT39024C
The BPP is 32
PixClock:9333333 LcdClock:28000000
In:    serial
Out:   lcd
Err:   lcd
Write I2C device 0x20 failed.
Write I2C device 0x20 failed.
Read I2C device 0x20 failed.
no menu keypad and right keypad is on!
Hit any key to stop autoboot:  0
NP2150#
NP2150#

Then use the following commands to load and launch system upgrade kernel:

setenv bootargs mem=64M console=ttyS0,115200n8 ip=off root=/dev/ram0 rw rdinit=/sbin/init
mmcinit
fatload mmc 0 0x80600000 uImage-upgrade
bootm

Or, as a one-liner:

setenv bootargs mem=64M console=ttyS0,115200n8 ip=off root=/dev/ram0 rw rdinit=/sbin/init; mmcinit; fatload mmc 0 0x80600000 uImage-upgrade; bootm

Gallery

TODO