Hello,
I'm trying to get Micro Solutions Backpack USB CD-RW to work and maybe write a simple firmware loader module. It's based on Cypress EZ-USB FX2 so it should be easy (the loading code is already present in the kernel for other devices).
Micro Solutions released firmware and load scrips for Linux - it used to be called bpck-usb-firmware-1.1.tgz but seems to have vanished from the web, even archive.org does not have it. Frugalware distro used to include a package bpck-usb-firmware-1.1-1-i686.fpm until version 1.7 (it was removed in 1.8) but I was not able to find it anywhere (even tried Frugalware developers).
At least the load script can be found here:
https://www.linuxquestions.org/questions/linux-hardware-18/external-usb-backpack-cd-rewriter-problem-212360/
Firmware filenames extracted from the script:
BP1SCAN.HEX, BP2SCAN.HEX (scan firmwares)
BP1CD5.HEX, BP1CD6.HEX, BP1HD5.HEX, BP1HD6.HEX (for USB 1 chips)
BP2CD5.HEX, BP2CD6.HEX, BP2HD5.HEX, BP2HD6.HEX (for USB 2 chips)
BPINTCD.HEX, BPINTHD.HEX (for internal USB 2 chips)
So there seems to be two kinds of external USB adapters/cables - with FX (USB 1) and FX2 (USB 2) chips. First, a "scan" firmware is loaded that identifies the drive type and changes the ID appropriately. Then a final firmware is loaded, depending on the chip type, drive version (5 or 6) and drive type (CD or HDD).
The latest devices have integrated USB support - no scanning is needed, just a CD or HDD firmware is loaded, depending on the ID.
My device (model 222011 with integrated USB) identifies as 0ac9:0010. Once the firmware is loaded, the identification changes to 0ac9:1234. I've tested it in Windows and extracted the firmware from usbsnoop dump. After loading using fxload, the ID changed but the device still reports vendor specific class. Probably the firmware for Windows is not the same as for Linux and is not fully USB mass storage compatible :(
lsusb output (before loading firmware):
Bus 002 Device 002: ID 0ac9:0010 Micro Solutions, Inc. BACKPACK
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0ac9 Micro Solutions, Inc.
idProduct 0x0010 BACKPACK
bcdDevice 1.82
iManufacturer 1 Micro Solutions
iProduct 3 Micro Solutions BACKPACK
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0020
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x88 EP 8 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
After loading firmware, only idProduct changes to 0x1234. Everything else remains.
--
Ondrej Zary
On Saturday 18 June 2022 19:35:01 Ondrej Zary wrote:
> Hello,
> I'm trying to get Micro Solutions Backpack USB CD-RW to work and maybe write a simple firmware loader module. It's based on Cypress EZ-USB FX2 so it should be easy (the loading code is already present in the kernel for other devices).
>
> Micro Solutions released firmware and load scrips for Linux - it used to be called bpck-usb-firmware-1.1.tgz but seems to have vanished from the web, even archive.org does not have it. Frugalware distro used to include a package bpck-usb-firmware-1.1-1-i686.fpm until version 1.7 (it was removed in 1.8) but I was not able to find it anywhere (even tried Frugalware developers).
>
> At least the load script can be found here:
> https://www.linuxquestions.org/questions/linux-hardware-18/external-usb-backpack-cd-rewriter-problem-212360/
> Firmware filenames extracted from the script:
> BP1SCAN.HEX, BP2SCAN.HEX (scan firmwares)
> BP1CD5.HEX, BP1CD6.HEX, BP1HD5.HEX, BP1HD6.HEX (for USB 1 chips)
> BP2CD5.HEX, BP2CD6.HEX, BP2HD5.HEX, BP2HD6.HEX (for USB 2 chips)
> BPINTCD.HEX, BPINTHD.HEX (for internal USB 2 chips)
>
> So there seems to be two kinds of external USB adapters/cables - with FX (USB 1) and FX2 (USB 2) chips. First, a "scan" firmware is loaded that identifies the drive type and changes the ID appropriately. Then a final firmware is loaded, depending on the chip type, drive version (5 or 6) and drive type (CD or HDD).
> The latest devices have integrated USB support - no scanning is needed, just a CD or HDD firmware is loaded, depending on the ID.
Finally found the lost firmware files!
There's a Frugalware Linux 0.6 DVD 1 ISO at PC World Poland which contains the bpck-usb-firmware-1.1-1-i686.fpm file:
https://www.pcworld.pl/ftp/pobierz/linux/1582.html
--
Ondrej Zary