Re: [linux-usb-devel] Patches still in the queue
Am Samstag, 12. Mai 2007 21:26 schrieb Alan Stern: > It could be controlled by both a Kconfig option and a writable module > parameter. I'm not sure that would satisfy everybody. But maybe there > _is_ no way to satisfy everyone... I agree. Hibernation with a mounted fs on usb sucks, no matter what you do. I suggest a setting per interface in sysfs. Regards Oliver - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
[linux-usb-devel] 【 パソコ ン利用で在宅収入 】 募 集
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Re: [linux-usb-devel] converting appletouch to usb autosuspend...
On Saturday 12 May 2007 19:51:26 Soeren Sonnenburg wrote: > Dear all, > > I've realized using the great powertop ( http://www.linuxpowertop.org/ ) > that loading the appletouch driver (and touching it once) makes consumes > about 0.3 W even when not touching the pad. As rmmod'ing appletouch > fixes this I wonder why the driver does not do this alone. So my > question is what does one have to do to convert a driver (such as > appletouch) to make use of usb autosuspend except for > > .supports_autosuspend = 1 > > ... > > While we are at it usb related powerhogs on this macbook pro are > uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func) > too... I've found that hci_usb also hogs power on the Macbook; blacklisting this module cuts down HZ considerably. I also found appletouch consumed ticks, just as you did. uhci_hcd then drops to noise; my Macbook's sitting on 10W with the backlight on minimum, which is about what it can manage in OS X on maximum life settings. -- Cheers, Alistair. Final year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] converting appletouch to usb autosuspend...
On Sat, 12 May 2007, Alan Stern wrote: > > While we are at it usb related powerhogs on this macbook pro are > > uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func) > > too... > They would use less power if the UHCI host controller were suspended. > But obviously it cannot be suspended while devices attached to it (such > as the USB keyboard and the appletouch device) remain active. A sidenote for completness, when this has been mentioned: Oliver has been working on autosuspend support for HID devices, he sent me some (yet incomplete) patches some time ago. So autosuspending of USB keyboards/mice/etc. is being worked on. Oliver, do you have any update please? Thanks, -- Jiri Kosina - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] [PATCH 14/16] USB: Add usbfs ioctl to get the frame number
On Sat, 12 May 2007 15:40:45 -0400 (EDT), Alan Stern <[EMAIL PROTECTED]> wrote: > > timestamp, which would not depend on HC implementing SOF number > > as a monotonously increasing counter (I think, it's not guaranteed). > The frame numbers are guaranteed to be monotonically increasing until they > roll over from 2047 to 0 (see 8.3.3, 8.4.3, and 10.2.3 in the USB spec). I see, you're right, of course. I only looked at 8.4.3, and it was somewhat vague. The 10.2.3 places stronger restrictions on the way numbers are generated, although oddly enough it alows a host to keep wider counters than are needed. -- Pete - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] converting appletouch to usb autosuspend...
On Sat, 12 May 2007, Soeren Sonnenburg wrote: > Dear all, > > I've realized using the great powertop ( http://www.linuxpowertop.org/ ) > that loading the appletouch driver (and touching it once) makes consumes > about 0.3 W even when not touching the pad. As rmmod'ing appletouch > fixes this I wonder why the driver does not do this alone. So my > question is what does one have to do to convert a driver (such as > appletouch) to make use of usb autosuspend except for > > .supports_autosuspend = 1 One has to add appropriate calls to usb_autopm_get_interface() and usb_autopm_put_interface(), or equally well, to usb_autopm_enable() and usb_autopm_disable(). One might also need to set intf->needs_remote_wakeup to 1 in the probe routine. > While we are at it usb related powerhogs on this macbook pro are > uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func) > too... They would use less power if the UHCI host controller were suspended. But obviously it cannot be suspended while devices attached to it (such as the USB keyboard and the appletouch device) remain active. Alan Stern - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] EP-0 returns timeout even when data is received by the device.
On Sat, 12 May 2007, Jayaprakash Shanmugam wrote: > Hi All, > > I have a EHCI host connected to 4 USB devices (dev1, dev2, dev3 and > dev4). I have two processes that make use of these devices through a > kernel object. I have some vendor commands (through EP-0) to all the > devices. Apart from this, dev1 has EP2 ( in ) bulk, dev2 has EP2 ( > in ) interrupt and dev4 has EP6 ( out ) bulk. There are 3 processes > in our system. From Process1, I read EP2 from dev1 periodically (for > every 30 ms) and send it to EP6 of dev4. The other process Process2, > reads the EP2 interrupt endpoint of dev2 periodically. The last > process Process3, tries to write to dev4 EP-0 quite frequently (every > 3 seconds). Sometimes, the usb_control_msg() receives timeout error. > I am not able to understand why it should return timeout error > intermittently. > > 1) When the control endpoint and bulk endpoint are used in a device, > Can I not use both of them simultaneously ? The Linux host software allows it. However the device itself might have some restrictions (although it shouldn't). > 2) When I tried to write to EP-0 of a device, the other process who > sends periodic data to EP-2 of the same device How can that be? You said above that on both dev1 and dev2, ep2 is in, not out. > receives the error > message - ep0out timeout error. Why should the process receive this > debug message (from the timeout handler in the usb_submit_urb() ) Most likely you misunderstood what happened. Please provide logs demonstrating the problem. > 3) When I tried to write to EP-0 of a device (while the other process > sending data to EP-2 of the same device periodically), the device > received the data succesfully. But, the host says the request is > timeout. Does it mean that the ACK for the EP-0 packet is received by > the URB who waits for ACK for the Bulk transfer. ep0 transfers involve several packets, so it doesn't make sense to talk about "the ACK for the EP-0 packet". If the device receives the data correctly and the host reports a timeout, it means that the device continues to send NAK packets even after it has received the data. > This mail may be huge. Since I am not able to understand the behavior > I wanted to give the full details of the issue. > > Note: I am running Linux 2.6 on MPC 8270 with Philips PCI - USB converter 2.6.what? Alan Stern - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] [PATCH 14/16] USB: Add usbfs ioctl to get the frame number
On Sat, 12 May 2007, Pete Zaitcev wrote: > On Fri, 11 May 2007 23:23:18 -0700, Greg KH <[EMAIL PROTECTED]> wrote: > > > I thought that you needed to do something with this value pretty > > quickly, and that by the time you were able to send something back into > > the kernel, the value would be not correct anymore. But if this is > > really just like a timestamp, then ok, I have no objection other than it > > needs to be correct for all host controllers. > > Greg, I'm sorry if I'm wrong, but it looks you missed the funny part. > Danny's device remembers the value that HC circulated in the SOF frame. > It then supplies that value alongside some data it returns. By reading > the "current" frame number from HC, Danny's application can tell > how many frames back, approximately, these data were generated > (this is not the time when it was transferred across USB). > > The gettimeofday or other kernel-known timestamp is not good enough, > because the device does not know it. Actually, I think that a clever > design would set an interrupt-out transfer with software initiated > timestamp, which would not depend on HC implementing SOF number > as a monotonously increasing counter (I think, it's not guaranteed). > Oh well. In fact the USB spec does anticipate that people will want to use the SOF values for timing and synchronization, and it goes to great length explaining ways in which that can be done. Timing of the SOF is more reliable than interrupt URBs, because the SOF is guaranteed to be the first transaction in each frame (and also because interrupt-out transfers will be retried in another frame if they fail). The frame numbers are guaranteed to be monotonically increasing until they roll over from 2047 to 0 (see 8.3.3, 8.4.3, and 10.2.3 in the USB spec). Alan Stern - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] Patches still in the queue
On Fri, 11 May 2007, Greg KH wrote: > > Can you suggest a better way of packaging it to help support the distros? > > I'm perfectly willing to change the way USB-persist gets enabled, to > > insure that people don't turn it on unless they really mean to. > > Is there any way to turn it on at run-time? That would be better for > everyone involved so that the feature will always be present and no > rebuilding of kernels is needed. Ha! When I first started working on this stuff, it was controlled by a module parameter. Dave Brownell objected then because there was no way for distros to turn it off! It could be controlled by both a Kconfig option and a writable module parameter. I'm not sure that would satisfy everybody. But maybe there _is_ no way to satisfy everyone... Alan Stern - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] Unusual dev addition for memory stick?
Alan Stern wrote: >> What is very strange also, if I write data to the stick (if it works), it >> seems to work better after that, that's why I also thought of the residual >> bytes. > > Could be a coincidence. Who knows? Thanks for looking at this Alan - the place hosting my mail server is having some problems and I'm in the process of moving it - so my email's been on-and-off all week. I got a new place - should be sorted out sometime this week. -- Phil Dibowitz [EMAIL PROTECTED] Open Source software and tech docsInsanity Palace of Metallica http://www.phildev.net/ http://www.ipom.com/ "Never write it in C if you can do it in 'awk'; Never do it in 'awk' if 'sed' can handle it; Never use 'sed' when 'tr' can do the job; Never invoke 'tr' when 'cat' is sufficient; Avoid using 'cat' whenever possible" -- Taylor's Laws of Programming signature.asc Description: OpenPGP digital signature - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
[linux-usb-devel] If hMenu is NULL, the window's current menu is removed.
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[linux-usb-devel] converting appletouch to usb autosuspend...
Dear all, I've realized using the great powertop ( http://www.linuxpowertop.org/ ) that loading the appletouch driver (and touching it once) makes consumes about 0.3 W even when not touching the pad. As rmmod'ing appletouch fixes this I wonder why the driver does not do this alone. So my question is what does one have to do to convert a driver (such as appletouch) to make use of usb autosuspend except for .supports_autosuspend = 1 ... While we are at it usb related powerhogs on this macbook pro are uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func) too... Soeren. -- Sometimes, there's a moment as you're waking, when you become aware of the real world around you, but you're still dreaming. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] [PROBLEM] ueagle-atm modem and usb mouse
On Thursday 10 May 2007 17:31, Alan Stern wrote: > On Wed, 9 May 2007, Stanislaw Gruszka wrote: > > > > Can you please provide the dmesg log from the Pentium-2 machine with UHCI > > > and with CONFIG_USB_DEBUG set? Show what happens when you connect the > > > mouse and then plug in the ueagle-atm device. > > > > Ok, in dmesk.2 the modem is connected when there is open /dev/input/mouse > > file (for about 1 second). I can read data until close file and open it > > again. > > This looks like it's all working properly. When the mouse device is > opened it reserves 93 us of bandwidth. When the ueagle-atm driver puts > the modem into the highest-speed setting, it tries to allocate 36 + 794 > us, for a total of 923 us. This is more than the 900 us maximum bandwidth > allowed by the USB spec for periodic transfers, so the attempt fails. > > In this situation the ueagle-atm driver ought to fall back to a slower > setting. > > Conversely, if the modem is already running (and using 830 us of > bandwidth) when you open the mouse device file, the mouse driver won't be > able to allocate its 93 us. But if you would close the mouse device file > and turn off the modem, then the next time you open the mouse file it > ought to work. You shouldn't need to unplug the mouse. > > Can you try doing that experiment? If it doesn't work then send the dmesg > log. Mouse work when nobody open /dev/input/mouse file during modem is connected, but if someone open the file when there is no bandwidth, no data from the mouse file can be read even after modem is disconnected. This is bug in input layer, return value of input_open_device() is not checked in file drivers/input/mousedev.c. But I see this is already fixed in input git tree. -- Regards Stanislaw Gruszka - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
[linux-usb-devel] EP-0 returns timeout even when data is received by the device.
Hi All, I have a EHCI host connected to 4 USB devices (dev1, dev2, dev3 and dev4). I have two processes that make use of these devices through a kernel object. I have some vendor commands (through EP-0) to all the devices. Apart from this, dev1 has EP2 ( in ) bulk, dev2 has EP2 ( in ) interrupt and dev4 has EP6 ( out ) bulk. There are 3 processes in our system. From Process1, I read EP2 from dev1 periodically (for every 30 ms) and send it to EP6 of dev4. The other process Process2, reads the EP2 interrupt endpoint of dev2 periodically. The last process Process3, tries to write to dev4 EP-0 quite frequently (every 3 seconds). Sometimes, the usb_control_msg() receives timeout error. I am not able to understand why it should return timeout error intermittently. 1) When the control endpoint and bulk endpoint are used in a device, Can I not use both of them simultaneously ? 2) When I tried to write to EP-0 of a device, the other process who sends periodic data to EP-2 of the same device receives the error message - ep0out timeout error. Why should the process receive this debug message (from the timeout handler in the usb_submit_urb() ) 3) When I tried to write to EP-0 of a device (while the other process sending data to EP-2 of the same device periodically), the device received the data succesfully. But, the host says the request is timeout. Does it mean that the ACK for the EP-0 packet is received by the URB who waits for ACK for the Bulk transfer. This mail may be huge. Since I am not able to understand the behavior I wanted to give the full details of the issue. Note: I am running Linux 2.6 on MPC 8270 with Philips PCI - USB converter Thanks, Jayaprakash. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
Re: [linux-usb-devel] [PATCH 14/16] USB: Add usbfs ioctl to get the frame number
On Fri, 11 May 2007 23:23:18 -0700, Greg KH <[EMAIL PROTECTED]> wrote: > I thought that you needed to do something with this value pretty > quickly, and that by the time you were able to send something back into > the kernel, the value would be not correct anymore. But if this is > really just like a timestamp, then ok, I have no objection other than it > needs to be correct for all host controllers. Greg, I'm sorry if I'm wrong, but it looks you missed the funny part. Danny's device remembers the value that HC circulated in the SOF frame. It then supplies that value alongside some data it returns. By reading the "current" frame number from HC, Danny's application can tell how many frames back, approximately, these data were generated (this is not the time when it was transferred across USB). The gettimeofday or other kernel-known timestamp is not good enough, because the device does not know it. Actually, I think that a clever design would set an interrupt-out transfer with software initiated timestamp, which would not depend on HC implementing SOF number as a monotonously increasing counter (I think, it's not guaranteed). Oh well. -- Pete - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
