ts7250 USB disconnects

[Peter Gammie]

This isn't strictly about the sim1, but the ts7250 uses an ep93xx chip as well. I sent the following to Martin Guy and he suggested I post it here. If any details would help, I'm very happy to dig them up for you.

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I'm having USB disconnection problems with a ts7250 and a cheap infra-red remote control receiver that pretends to be a HID device. I plug it in, it gets enumerated and things look OK. I press a button on the remote and the light in the receiver flashes. I press it again and the device disconnects, then gets enumerated again. This is always what happens.

The IR receiver works fine under OS X on a MacBook and Debian running as a VMWare guest. I have a lot of other USB devices working on the ts7250, including a hub, an rt73 WiFi dongle, a Creative USB audio adaptor and a bus-powered disk.

Here's what gets put on the console:

usb 1-1.1: USB disconnect, address 13
usb 1-1.1: new low speed USB device using ep93xx-ohci and address 14
usb 1-1.1: New USB device found, idVendor=1130, idProduct=6605
usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1.1: Product: USB Remote
usb 1-1.1: Manufacturer: Ping-IT
usb 1-1.1: configuration #1 chosen from 1 choice
input: Ping-IT USB Remote as /devices/platform/ep93xx-ohci/usb1/1-1/1-1.1/1-1.1:1.0/input/input4
generic-usb 0003:1130:6605.0005: input: USB HID v1.10 Keyboard [Ping-IT USB Remote ] on usb-ep93xx-1.1/input0

< press a key on the remote twice >

usb 1-1.1: USB disconnect, address 14
usb 1-1.1: new low speed USB device using ep93xx-ohci and address 15
usb 1-1.1: New USB device found, idVendor=1130, idProduct=6605
usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-1.1: Product: USB Remote
usb 1-1.1: Manufacturer: Ping-IT
usb 1-1.1: configuration #1 chosen from 1 choice
input: Ping-IT USB Remote as /devices/platform/ep93xx-ohci/usb1/1-1/1-1.1/1-1.1:1.0/input/input5
generic-usb 0003:1130:6605.0006: input: USB HID v1.10 Keyboard [Ping-IT USB Remote ] on usb-ep93xx-1.1/input0
usb 1-1.1: USB disconnect, address 15

It makes no difference if I plug it in directly or into the hub.

I am aware that the USB subsystem of the EP9302 is buggy, but have found no bugs relating to low speed devices. I am at a loss as to what might be the problem. Do you have any suggestions?

cheers
peter

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http://peteg.org/