--- Alan Stern <[EMAIL PROTECTED]> wrote:
> On Sat, 20 Aug 2005, Ivy wrote:
>
> > Hi,
> >
> > I am tring to find isochronous endpoints in an Interface and
> > claim the particular interface. I m using the following code. It does the
> > same. But i am not able to receive isochronous packets ... my kernel
> > version 2.6.9.
> >
> > i found difference in /proc/bus/usb/devices file when i m
> > loading hci_usb and my module seperatly..
> >
> > The difference is, when hci_usb module is loaded, one hub
> > device shows like some bandwidth allocated .
> >
> >
> > T: Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
> > B: Alloc= 27/900 us ( 3%), #Int= 1, #Iso= 2
> > D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
> > P: Vendor=0000 ProdID=0000 Rev= 2.06
> > S: Manufacturer=Linux 2.6.9-1.667 uhci_hcd
> > S: Product=UHCI Host Controller
> > S: SerialNumber=0000:00:1d.3
> > C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA
> > I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
> > E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
> >
> > But when i loaded my module, it is displaying as Alloc 0%
> > (Remaining all device are same). I think i am missing some thing. Any
> > suggestions ...
>
> Don't worry about bandwidth allocation for now.
>
> > code snap:
> > usb_fill_isoc_urb (bluetooth->isoc_read_urb,
> > bluetooth->dev,
> > usb_rcvisocpipe(bluetooth->dev,131),
> > bluetooth->isoc_in_buffer,
> > bluetooth->isoc_in_buffer_size,
> > bluetooth_read_isoc_callback,
> > bluetooth,bluetooth->isoc_in_interval);
> >
> >
> > result = usb_submit_urb(bluetooth->isoc_read_urb,
> > GFP_KERNEL);
> > if (result < 0)
> > err("Error in isoc submit ");
>
> What is this usb_fill_isoc_urb? It doesn't look like there's any value
> specified for isoc_read_urb->number_of_packets or for the iso_frame_desc
> array.
>
This is my usb_fill_isoc_urb function
static void usb_fill_isoc_urb(struct urb *urb, struct usb_device
*dev, unsigned int pipe, void *transfer_buffer,int buffer_length, usb_comple
te_t complete, void *context,int interval)
{
int offset=0,i,len;
spin_lock_init(&urb->lock);
urb->dev = dev;
urb->pipe = pipe;
urb->transfer_buffer = transfer_buffer;
urb->transfer_buffer_length = buffer_length;
urb->transfer_flags = URB_ISO_ASAP;
urb->complete = complete;
urb->context = context;
urb->interval = interval;
len = buffer_length;
for (i=0; i < 1 && len >= buffer_length; i++, offset +=
buffer_length, len -= buffer_length) {
urb->iso_frame_desc[i].offset = offset;
urb->iso_frame_desc[i].length = buffer_length;
dbg("desc %d offset %d len %d", i, offset, buffer_length);
}
if (len && i < 1 ) {
urb->iso_frame_desc[i].offset = offset;
urb->iso_frame_desc[i].length = len;
dbg("desc %d offset %d len %d", i, offset, len);
i++;
}
urb->number_of_packets = i;
}
> Alan Stern
>
i have loaded module. i m getting some data at the first
isoc_read callback. after that completely zeros.
Aug 19 16:53:47 localhost kernel: usb 4-1: new full speed USB device using
uhci_hcd and address 6
Aug 19 16:53:48 localhost kernel: usb 4-1: Product: SiW
Aug 19 16:53:48 localhost kernel: usb 4-1: Manufacturer: SiW
Aug 19 16:53:48 localhost kernel: usb 4-1: SerialNumber: 8630040D0B00
Aug 19 16:53:48 localhost kernel: drivers/usb/class/bluetty.c: USB Bluetooth
support registered
Aug 19 16:53:48 localhost kernel: drivers/usb/class/bluetty.c: USB Bluetooth
converter detected
Aug 19 16:53:48 localhost kernel: drivers/usb/class/bluetty.c: isoc ifnum 1
alts 2
Aug 19 16:53:48 localhost kernel: drivers/usb/class/bluetty.c: Bluetooth
converter now attached to ttyUB0 (or usb/ttub/0 for devfs)
Aug 19 16:53:48 localhost kernel: usbcore: registered new driver bluetty-iso
Aug 19 16:53:48 localhost kernel: drivers/usb/class/bluetty.c: USB Bluetooth
tty driver v0.13
Aug 19 16:53:56 localhost blue: Initiating signal handler
Aug 19 16:53:56 localhost blue: Opening dev /dev/ttyUB0
Aug 19 16:53:56 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 4 byte(s)
Aug 19 16:53:58 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 4 byte(s)
Aug 19 16:53:58 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 5 byte(s)
Aug 19 16:53:58 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 5 byte(s)
Aug 19 16:54:00 localhost udev[6130]: creating device node '/udev/ttyUB0'
Aug 19 16:54:05 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 11 byte(s)
Aug 19 16:54:05 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 10 byte(s)
Aug 19 16:54:05 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 27 byte(s)
Aug 19 16:54:07 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 8 byte(s)
Aug 19 16:54:07 localhost kernel: drivers/usb/class/bluetty.c: bluetooth_write
- 11 byte(s)
Aug 19 16:54:07 localhost kernel: 00 01 30 00 00 00 00 03 00 01 00 01 00 01 00
ff ff
Aug 19 16:54:07 localhost kernel: SCO PACKET SIZE IS 48
Aug 19 16:54:07 localhost kernel: ff ff ff ff fe ff fe ff fd ff fe ff fe ff fe
ff fe
Aug 19 16:54:07 localhost kernel: SCO PACKET SIZE IS 48
Aug 19 16:54:07 localhost kernel: ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff
fe ff
Aug 19 16:54:07 localhost kernel: SCO PACKET SIZE IS 48
Aug 19 16:54:07 localhost kernel: 00 01 30 fe ff fe ff fe ff fe ff fe ff fe ff
00 00
Aug 19 16:54:07 localhost kernel: SCO PACKET SIZE IS 48
Aug 19 16:54:07 localhost kernel: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00
Aug 19 16:54:07 localhost kernel: SCO PACKET SIZE IS 48
Aug 19 16:54:07 localhost kernel: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00
Aug 19 16:54:07 localhost kernel: SCO PACKET SIZE IS 48
-Ivy
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