On Thursday 06 March 2008, Hans Petter Selasky wrote: > Hi, > > I think that we should have this functionality in the USB kernel > like a separate IOCTL, that only takes an USB address like > argument, hence every USB device in the kernel knows which is its > parent HUB. Yes, this would be ideal.
> There is a problem when you do a port reset, and that is that the > USB device goes into the unaddressed state, and starts responding > to address 0. If another device is being enumerated at the same > time, this might cause problems. Hmmm...Any suggestions? > > BTW: What are the main purposes of your program? To shutoff a USB device so that it knows to stop. See my email earlier to the list entitled "Suspend/Sleep/Stop USB device". Basically my built-in camera was getting hot and drawing power. I needed a way to shut it down as not to waste power. > > --HPS > > On Wednesday 05 March 2008, Anish Mistry wrote: > > I've written the upower utility allows you to selectively suspend > > usb ports. It acts similar to the Windows "Stop Removable > > Device" process. It has only been tested on 7.0-RELEASE. > > > > WARNING: This program may eat your lunch and kick your dog. > > You've been warned. > > > > Download and compile. > > > > fetch http://am-productions.biz/docs/upower.c > > gcc -o upower upower.c > > > > You will need to be root or have rw access to the uhub devices. > > eg. /dev/usbX > > > > Use "usbdevs -v" to find the port/device to suspend. > > # usbdevs -v > > Controller /dev/usb0: > > addr 1: full speed, self powered, config 1, UHCI root > > hub(0x0000), Intel(0x0000), rev 1.00 > > port 1 powered > > port 2 powered > > Controller /dev/usb1: > > addr 1: full speed, self powered, config 1, UHCI root > > hub(0x0000), Intel(0x0000), rev 1.00 > > port 1 powered > > port 2 addr 2: low speed, power 100 mA, config 1, product 0x0009 > > (0x0009), vendor 0x045e(0x045e), rev 1.05 > > Controller /dev/usb2: > > addr 1: full speed, self powered, config 1, UHCI root > > hub(0x0000), Intel(0x0000), rev 1.00 > > port 1 powered > > port 2 addr 2: full speed, power 100 mA, config 1, Fingerprint > > Sensor(0x2580), vendor 0x08ff(0x08ff), rev 6.23 > > Controller /dev/usb3: > > addr 1: full speed, self powered, config 1, UHCI root > > hub(0x0000), Intel(0x0000), rev 1.00 > > port 1 powered > > port 2 powered > > Controller /dev/usb4: > > addr 1: high speed, self powered, config 1, EHCI root > > hub(0x0000), Intel(0x0000), rev 1.00 > > port 1 powered > > port 2 powered > > port 3 addr 2: high speed, self powered, config 1, product > > 0x005a(0x005a), vendor 0x0409(0x0409), rev 1.00 > > port 1 powered > > port 2 powered > > port 3 powered > > port 4 powered > > port 4 powered > > Controller /dev/usb5: > > addr 1: high speed, self powered, config 1, EHCI root > > hub(0x0000), Intel(0x0000), rev 1.00 > > port 1 powered > > port 2 powered > > port 3 powered > > port 4 addr 2: high speed, power 320 mA, config 1, Sirius USB2.0 > > Camera(0x3343), Vimicro Corp.(0x0ac8), rev 1.00 > > > > > > Since my built-in USB camera draws power when not in use, I'll > > suspend it to save battery time. > > > > # ./upower /dev/usb5 4 suspend -- Anish Mistry [EMAIL PROTECTED] AM Productions http://am-productions.biz/
signature.asc
Description: This is a digitally signed message part.
