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At present, this is just a command line tool for Linux only. Integrating this with the Rockbox utility and porting to other platforms should be straightforward; the README contains more information. Change-Id: Ie66fc837a02ab13c878925360cabc9805597548a |
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| jztool.c | ||
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jztool -- Ingenic device utility & bootloader installer
The jztool utility can install, backup, and restore the bootloader on
Rockbox players based on a supported Ingenic SoC.
FiiO M3K
To use jztool on the FiiO M3K you have to connect the player to your
computer in USB boot mode.
The easiest way to do this is by plugging in the microUSB cable to the M3K and holding the volume down button while plugging the USB into your computer. If you entered USB boot mode, the button light will turn on but the LCD will turn off.
To install or update the Rockbox bootloader on the M3K, use the command
jztool fiiom3k install. It is recommended that you take a backup of your
current bootloader so you can restore it in case of any problems.
After any operation finishes, you will have to force a power off of the M3K by holding down the power button for at least 10 seconds. This must be done whether the operation succeeds or fails. Just don't power off or unplug the device in the middle of an operation -- that might make bad things happen.
See jztool --help for info.
TODO list
Add better documentation and logging
There's only a bare minimum of documentation, and logging is sparse, not really enough to debug problems.
Some of the error messages could be friendlier too.
Integration with the Rockbox utility
Adding support to the Rockbox utility should be mostly boilerplate since the jztool library wraps all the troublesome details.
Getting appropriate privileges to access the USB device is the main issue. Preferably, the Rockbox utility should not run as root/admin/etc.
- Windows: not sure
- Linux: needs udev rules or root privileges
- Mac: apparently does not need privileges
Porting to Windows
Windows wants to see a driver installed before we can access the USB device, the easiest way to do this is by having the user run Zadig, a 3rd party app which can install the WinUSB driver. WinUSB itself is from Microsoft and bundled with Windows.
Zadig's homepage: https://zadig.akeo.ie/
Porting to Mac
According to the libusb wiki, libusb works on Mac without any special setup or privileges, presumably porting there is easy.