On Wed, Nov 01, 2006 at 02:57:42AM +0300, Vladimir Volovich wrote: > i have a UPS drive (Ippon Smart Power Pro 2000) which has a usb and a > serial interface, but my mainboard doesn't have an external serial port, > and i'd like to manage the UPS via the USB port. > > the USB interface is based on Cypress Semiconductor chip - here is the > output from "lsusb -v": > [...] > Report Descriptors: > ** UNAVAILABLE **
To get full "lsusb -v" output for a HID device, you need to unload the
usbhid module. Be careful if you also have an USB keyboard - you will
need to enter all commands on one line:
rmmod usbhid; lsusb -v >lsusb.log; modprobe usbhid
> i loaded the cypress_m8 module via "modprobe cypress_m8", but when i
> plug in the USB cable, i don't get any serial device node created in
> /dev/usb/ (which is supposed to happen?).
>
> when i plug in the USB cable, i get these messages in the dmesg output:
>
> usb 6-2: new low speed USB device using uhci_hcd and address 28
> usb 6-2: configuration #1 chosen from 1 choice
> usbcore: registered new driver hiddev
> hiddev96: USB HID v1.00 Device [Cypress Semiconductor USB to Serial] on
> usb-0000:00:1d.1-2
> usbcore: registered new driver usbhid
> drivers/usb/input/hid-core.c: v2.6:USB HID core driver
>
> i.e. the usbhid module gets loaded and it gets control over the USB
> port (instead of thecypress_m8 driver), and creates the device node
> /dev/usb/hiddev0
This would be normal for an UPS with USB interface, if the device name
would not contain "USB to Serial"...
> if i disable the usbhid module (rename usbhid.ko to usbhid.ko_ to
> prevent it from auto-loading), i just get this:
>
> usb 6-1: new low speed USB device using uhci_hcd and address 29
> usb 6-1: configuration #1 chosen from 1 choice
>
> and no device node is created.
>
> my question is - could the cypress_m8 driver (or other driver) be used
> with this controller (device id is 0665:5161) to make it look as a
> plain serial device?
I have tried to do this with an Ippon SmartWinner 1000 (don't remember the
exact device ID) by adding the device ID to the table in cypress_m8, but
it did not work - apparently this device is different. Actually, it was
even worse than "does not work" - I have got a kernel oops in cypress_m8;
I had no time to debug this, and just attached the UPS to a serial port.
pgpMZr1WXwn1u.pgp
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