At Fri, 3 Jul 2009 14:33:25 -0700, Indeed. Looking at the kernel messages, it seems relevant only with the usb stack. Maybe bisecting with limited path (drivers/usb) would be easier. Takashi --

From: Randy Dunlap <randy.dunlap@oracle.com> Fix USB gadget audio: select SND_PCM, like many other sound drivers do, to fix build errors: drivers/built-in.o: In function `f_audio_playback_work': audio.c:(.text+0x15a3e7): undefined reference to `snd_pcm_kernel_ioctl' audio.c:(.text+0x15a471): undefined reference to `snd_pcm_lib_write' drivers/built-in.o: In function `_snd_pcm_hw_param_set': audio.c:(.text+0x15aca7): undefined reference to `snd_interval_refine' drivers/built-in.o: In functio...

Dear Experts, I am trying to create a new URB in the completion call back. Here I am giving the code that I am using. void my_usb_stor_blocking_completion(struct urb *urb) { struct urb *rr_urb ; // // // rr_urb = (struct urb*)kmalloc(sizeof(struct urb), GFP_KERNEL); if( NULL == rr_urb) return -ENOMEM; memcpy(rr_urb, urb, sizeof(struct urb)); usb_fill_bulk_urb(rr_urb, current_urb_context->pusb_dev, current_urb_cont...

Good. Now urb creation is working with these changes. Thanks for help. Regards, RD --

As Alan noted -- not really. Maybe hook it up to an external hub; most of those seem to claim they support power switching. I did once have a system with an OHCI root hub which supported power switching. Which was handy because one UPS needed to start its enumeration from link-power-off, not unlike what you are observing. That system made a good regression test for the feature in the Linux-USB stack whereby it tried to force root hub enumeration to start from power-off. Since that system di...

Not for OHCI root hub power switching support, though ... :) --

On Fri, 3 Jul 2009 15:45:07 -0400 (EDT) Nice. None of the built-in hubs supported this though, and this particular "feature" got me extra disappointed: No overcurrent protection And here I thought everything on a modern motherboard hade overcurrent protection. :/ Luckily both two hubs I had lying around supported power switching though (confirmed it using a optical mouse). Now for the fun part. Once I put an extra hub between the host and the IR device, it started working nicely on bo...

The irq handler will touch memory. Even in the error case some URBs may complete. Thus no memory must be kfreed before all URBs are killed. Signed-off-by: Oliver Neukum <oliver@neukum.org> -- commit e91d238d2b6f83f9b64b57b570ee150b1cd008e7 Author: Oliver Neukum <oneukum@linux-d698.(none)> Date: Fri Jul 3 18:18:26 2009 +0200 stv680: fix access to freed memory in error case in the error case some URBs may be active and access memory URBs must be killed before a...

OMAP3EVM uses ISP1504 phy which doesn't require any programming and thus has to use NOP otg transceiver. Cleanups being done: - Remove unwanted code in usb-musb.c file - Register nop in OMAP3EVM board file using usb_nop_xceiv_register(). - Select NOP_USB_XCEIV for OMAP3EVM boards. Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com> --- This patch is refreshed based on David's recommendations at [1] and [2]. [1] http://marc.info/?l=linux-omap&m=123904265231360&w=2 [2] ht...

Hello everyone, I've been working on a USB Composite Gadget driver taken from Palm Pre source code[1]. I managed to somehow port it to kernel 2.6.30 and it works great if only mass storage is enabled. However, if I change it to support both mass storage and RNDIS (which is our goal for now) Windows has hard time detecting the device (ie. missing drivers). Linux on the other hand, handles everything quite fine. So now, first of all, does anyone know about any newer implementations of ...

On Fri, 03 Jul 2009 10:45:55 +0200, Xiaofan Chen <xiaofanc@gmail.com> Actually, I have a RNDIS driver installed. If I compile the device with Ethernet Gadget for instance, I can communicate with Windows via the RNDIS protocol. Also, If I compile the mass storage I can treat the device as mass storage. Problem is, I cannot seem to make Windows handle a composite with RNDIS and mass storage. My guess is, neither mass storage nor RNDIS driver matches the device (as it has both...

On Fri, 03 Jul 2009 11:23:31 +0200, Xiaofan Chen <xiaofanc@gmail.com> Currently, only "USB Mass Storage Device" is present. Properties window shows a "This device cannot start. (Code 10)" error message. No volume (either in My Computer or Computer Management->Disk Management) is shown. No entries regarding the RNDIS functionality or USB Composite. Do I need to install the "USB Common Class Generic Parent Driver"? I'll try to read the link you've send -- maybe it'll help. ...

On Fri, 03 Jul 2009 13:12:41 +0200, Xiaofan Chen <xiaofanc@gmail.com> Thanks again for useful links. Bus 002 Device 066: ID 0830:0102 Palm, Inc. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0830 Palm, Inc. idProduct 0x0102 bcdDevice ...

Hello, Michal is working with me on that composite gadget, he already went home, so let me answer these questions. Unfortunately no - we don't have real Palm and original Windows drivers for it. We only adapted Palm open source kernel usb gadget driver for our ARM S3C6410 They are using standard RNDIS driver, it is well detected under Linux and works there fine with 'rndis_host' driver. Best regards -- Marek Szyprowski Samsung Poland R&D Center --

Hello, I just did one more experiment. I've selected to install the driver manually in Windows wizard and I seleted the standard linux.inf for Linux RNDIS Ethernet gadget (from Documentation/usb/linux.inf, we used it earlier for the standard g_ether usb gadget module in RNDIS mode, it is available for example here: http://beagleboard.googlecode.com/files/linux.inf ). I was really surprised, the driver installed correctly and RNDIS connection started working! So the real problem is to create...

From this page, it does not seem to use RNDIS at all under Windows. http://kb.palm.com/wps/portal/kb/common/article/50331_en.html "Windows: **If the Found New Hardware wizard opens, click Cancel. ** When prompted, select Open folder to view files using Windows Explorer." It seems that it only uses the USB mass storage mode. Not so sure if this helps. It seems to me that you need to enable usbnet by yourself. http://predev.wikidot.com/usbnet-setup But the best is to get the real USB driver an...

Exactly, however, as we are trying to create a custom made composite gadget which will support several functions, we probably won't be able to use any existing drivers. This is why, I'm wondering whether creating a Windows driver (ie. inf file) for a multi-function device is an easy (copy-and-paste preferable) task. Note that we are not developing any new protocol or anything -- just We tried to use some vendor and product IDs that the Palm composite gadget had hardcoded hoping Wi...

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For both IN and OUT transfers, cache consistency is handled by map_urb_for_dma and unmap_urb_for_dma. Those two functions are in You can disable DMA for ep0 if you want. It shouldn't make much difference. But if you're getting these errors already, maybe you'll get similar errors with transfers to other endpoints. So it might be better to fix the problem than to try working around it. Alan Stern --

I would have said that dma_map_single, not usb_submit_urb, calls Obviously you looked at map_urb_for_dma. Have you also looked at unmap_urb_for_dma? Alan Stern --

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I've assumed that such changes should be made by someone more experienced t= han=20 me. I don't know how USB works and what an "endpoint" is.

I'll make it. Regards Oliver --

One other thing. uvcvideo (cheese) does not continue to leak but my userspace stuff did. I believe that is because uvcvideo uses an urb pool, so reuses the urbs. I could not, but maybe you can in your app and that may be a work-around for this leak consuming all memory. This might be useful if you cannot upgrade your kernel beyond 2.6.27.... Regards, Steve --

Greg, any preferences? I was planning on just rolling this in to my 2.6.32 queue unless you have any objections. --