I'm currently writing a driver for the Philips eHome Infrared Transciever
based on the existing lirc_atiusb driver. Judging from USB Snoopy's
output on Windows XP, the windows driver gets two endpoints
with interrupt-style pipes after enumeration.
Strangely enough when trying to recreate the exat same thing on Linux
(2.6.8-24.11-default i686 SuSE) I only get two bulk-type pipes and
no interrupt-type pipes although configuration, interface and altSetting
seem to be identical.
Here's the output from USB Snoopy followed by the code snippet.
[0 ms] UsbSnoop compiled on Jan 18 2003 22:41:32 loading
[0 ms] UsbSnoop - DriverEntry(f7bf0c40) : Windows NT WDM version 1.32
[10 ms] UsbSnoop - AddDevice(f7bf0f50) : DriverObject 861b3a20, pdo 86275c48
[10 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_PNP (0x00000018)
[10 ms] UsbSnoop - MyDispatchPNP(f7bf0ee0) : IRP_MJ_PNP (0x00000018)
[11 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_PNP
(IRP_MN_QUERY_RESOURCE_REQUIREMENTS)
[11 ms] UsbSnoop - MyDispatchPNP(f7bf0ee0) : IRP_MJ_PNP
(IRP_MN_QUERY_RESOURCE_REQUIREMENTS)
[11 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_PNP
(IRP_MN_FILTER_RESOURCE_REQUIREMENTS)
[11 ms] UsbSnoop - MyDispatchPNP(f7bf0ee0) : IRP_MJ_PNP
(IRP_MN_FILTER_RESOURCE_REQUIREMENTS)
[11 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_PNP
(IRP_MN_QUERY_CAPABILITIES)
[11 ms] UsbSnoop - MyDispatchPNP(f7bf0ee0) : IRP_MJ_PNP
(IRP_MN_QUERY_CAPABILITIES)
[11 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_PNP (IRP_MN_START_DEVICE)
[11 ms] UsbSnoop - MyDispatchPNP(f7bf0ee0) : IRP_MJ_PNP (IRP_MN_START_DEVICE)
[11 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[11 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_SYSTEM_CONTROL
[11 ms] UsbSnoop - MyDispatchInternalIOCTL(f7befe80) : fdo=86275c48,
Irp=8628faf8, IRQL=0
[11 ms] >>> URB 1 going down >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
TransferBufferLength = 00000012
TransferBuffer = 8634e2b0
TransferBufferMDL = 00000000
Index = 00000000
DescriptorType = 00000001 (USB_DEVICE_DESCRIPTOR_TYPE)
LanguageId = 00000000
[16 ms] UsbSnoop - MyInternalIOCTLCompletion(f7befdb0) :
fido=00000000, Irp=8628faf8, Context=8628d048, IRQL=2
[16 ms] <<< URB 1 coming back <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
PipeHandle = 862690d0
TransferFlags = 0000000b (USBD_TRANSFER_DIRECTION_IN,
USBD_SHORT_TRANSFER_OK)
TransferBufferLength = 00000012
TransferBuffer = 8634e2b0
TransferBufferMDL = 861e66d0
00000000: 12 01 10 01 00 00 00 10 71 04 15 08 00 00 01 02
00000010: 03 01
UrbLink = 00000000
SetupPacket =
00000000: 80 06 00 01 00 00 12 00
[16 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[16 ms] UsbSnoop - MyDispatchInternalIOCTL(f7befe80) : fdo=86275c48,
Irp=8628faf8, IRQL=0
[16 ms] >>> URB 2 going down >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
TransferBufferLength = 00000009
TransferBuffer = 86240e50
TransferBufferMDL = 00000000
Index = 00000000
DescriptorType = 00000002 (USB_CONFIGURATION_DESCRIPTOR_TYPE)
LanguageId = 00000000
[20 ms] UsbSnoop - MyInternalIOCTLCompletion(f7befdb0) :
fido=00000000, Irp=8628faf8, Context=862a2c98, IRQL=2
[20 ms] <<< URB 2 coming back <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
PipeHandle = 862690d0
TransferFlags = 0000000b (USBD_TRANSFER_DIRECTION_IN,
USBD_SHORT_TRANSFER_OK)
TransferBufferLength = 00000009
TransferBuffer = 86240e50
TransferBufferMDL = 861e66d0
00000000: 09 02 20 00 01 01 00 a0 32
UrbLink = 00000000
SetupPacket =
00000000: 80 06 00 02 00 00 09 00
[20 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[20 ms] UsbSnoop - MyDispatchInternalIOCTL(f7befe80) : fdo=86275c48,
Irp=8628faf8, IRQL=0
[20 ms] >>> URB 3 going down >>>
-- URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
TransferBufferLength = 00000020
TransferBuffer = 863477f8
TransferBufferMDL = 00000000
Index = 00000000
DescriptorType = 00000002 (USB_CONFIGURATION_DESCRIPTOR_TYPE)
LanguageId = 00000000
[25 ms] UsbSnoop - MyInternalIOCTLCompletion(f7befdb0) :
fido=00000000, Irp=8628faf8, Context=862432c0, IRQL=2
[25 ms] <<< URB 3 coming back <<<
-- URB_FUNCTION_CONTROL_TRANSFER:
PipeHandle = 862690d0
TransferFlags = 0000000b (USBD_TRANSFER_DIRECTION_IN,
USBD_SHORT_TRANSFER_OK)
TransferBufferLength = 00000020
TransferBuffer = 863477f8
TransferBufferMDL = 861e66d0
00000000: 09 02 20 00 01 01 00 a0 32 09 04 00 00 02 ff ff
00000010: ff 00 07 05 01 02 10 00 00 07 05 81 02 10 00 00
UrbLink = 00000000
SetupPacket =
00000000: 80 06 00 02 00 00 20 00
[25 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[25 ms] UsbSnoop - MyDispatchInternalIOCTL(f7befe80) : fdo=86275c48,
Irp=8628faf8, IRQL=0
[25 ms] >>> URB 4 going down >>>
-- URB_FUNCTION_SELECT_CONFIGURATION:
ConfigurationDescriptor = 0x863477f8 (configure)
ConfigurationDescriptor : bLength = 9
ConfigurationDescriptor : bDescriptorType = 0x00000002
ConfigurationDescriptor : wTotalLength = 0x00000020
ConfigurationDescriptor : bNumInterfaces = 0x00000001
ConfigurationDescriptor : bConfigurationValue = 0x00000001
ConfigurationDescriptor : iConfiguration = 0x00000000
ConfigurationDescriptor : bmAttributes = 0x000000a0
ConfigurationDescriptor : MaxPower = 0x00000032
ConfigurationHandle = 0x00000000
Interface[0]: Length = 56
Interface[0]: InterfaceNumber = 0
Interface[0]: AlternateSetting = 0
[85 ms] UsbSnoop - MyInternalIOCTLCompletion(f7befdb0) :
fido=00000000, Irp=8628faf8, Context=862e2c48, IRQL=0
[85 ms] <<< URB 4 coming back <<<
-- URB_FUNCTION_SELECT_CONFIGURATION:
ConfigurationDescriptor = 0x863477f8 (configure)
ConfigurationDescriptor : bLength = 9
ConfigurationDescriptor : bDescriptorType = 0x00000002
ConfigurationDescriptor : wTotalLength = 0x00000020
ConfigurationDescriptor : bNumInterfaces = 0x00000001
ConfigurationDescriptor : bConfigurationValue = 0x00000001
ConfigurationDescriptor : iConfiguration = 0x00000000
ConfigurationDescriptor : bmAttributes = 0x000000a0
ConfigurationDescriptor : MaxPower = 0x00000032
ConfigurationHandle = 0x8630dc38
Interface[0]: Length = 56
Interface[0]: InterfaceNumber = 0
Interface[0]: AlternateSetting = 0
Interface[0]: Class = 0x000000ff
Interface[0]: SubClass = 0x000000ff
Interface[0]: Protocol = 0x000000ff
Interface[0]: InterfaceHandle = 0x861db800
Interface[0]: NumberOfPipes = 2
Interface[0]: Pipes[0] : MaximumPacketSize = 0x00000010
Interface[0]: Pipes[0] : EndpointAddress = 0x00000001
Interface[0]: Pipes[0] : Interval = 0x00000001
Interface[0]: Pipes[0] : PipeType = 0x00000003
(UsbdPipeTypeInterrupt)
Interface[0]: Pipes[0] : PipeHandle = 0x861db81c
Interface[0]: Pipes[0] : MaxTransferSize = 0x00001000
Interface[0]: Pipes[0] : PipeFlags = 0x00000000
Interface[0]: Pipes[1] : MaximumPacketSize = 0x00000010
Interface[0]: Pipes[1] : EndpointAddress = 0x00000081
Interface[0]: Pipes[1] : Interval = 0x00000001
Interface[0]: Pipes[1] : PipeType = 0x00000003
(UsbdPipeTypeInterrupt)
Interface[0]: Pipes[1] : PipeHandle = 0x861db83c
Interface[0]: Pipes[1] : MaxTransferSize = 0x00001000
Interface[0]: Pipes[1] : PipeFlags = 0x00000000
[85 ms] UsbSnoop - DispatchAny(f7bee610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
[85 ms] UsbSnoop - MyDispatchInternalIOCTL(f7befe80) : fdo=86275c48,
Irp=8628faf8, IRQL=0
Am I right in the assumption that everything up to here is part of the
enumeration
process? Is Linux doing something differently here that may cause the problem?
Here's what I do after enumration (almost verbatim from the atiusb driver):
static int usb_remote_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_host_interface *idesc;
struct usb_endpoint_descriptor *ep=NULL, *ep_in=NULL, *ep_out=NULL;
struct usb_host_config *config;
struct irctl *ir = NULL;
struct lirc_plugin *plugin = NULL;
struct lirc_buffer *rbuf = NULL;
int devnum, pipe, maxp, len, buf_len, bytes_in_key;
int minor = 0;
int i;
char buf[63], name[128]="";
int mem_failure = 0;
dprintk(DRIVER_NAME ": usb probe called\n");
config=dev->actconfig;
dprintk(DRIVER_NAME ": current configuration %d, current interface
%d, num endpoints
%d\n",config->desc.bConfigurationValue,intf->cur_altsetting->desc.bInterfaceNumber,intf->cur_altsetting->desc.bNumEndpoints);
idesc = intf->cur_altsetting;
for (i = 0; i < idesc->desc.bNumEndpoints; ++i) {
ep = &idesc->endpoint[i].desc;
dprintk("endpoint: length 0x%x descriptortype - 0x%x
endpointaddress
- 0x%x attributes 0x%x - packetsize 0x%x - interval 0x%x\n",
ep->bLength, ep->bDescriptorType, ep->bEndpointAddress,
ep->bmAttributes, ep->wMaxPacketSize, ep->bInterval);
if ((ep_in == NULL)
&& ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
USB_DIR_IN)
&& ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
USB_ENDPOINT_XFER_INT)) {
dprintk(DRIVER_NAME ": acceptable inbound endpoint
found\n");
ep_in = ep;
}
if ((ep_out == NULL)
&& ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
USB_DIR_OUT)
&& ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
USB_ENDPOINT_XFER_INT)) {
dprintk(DRIVER_NAME ": acceptable outbound endpoint
found\n");
ep_out = ep;
}
}
if (ep_in == NULL) {
dprintk(DRIVER_NAME ": no acceptable endpoint found\n");
#ifdef KERNEL_2_5
return -ENODEV;
#else
return NULL;
#endif
}
...
}
And here's the debug output after plugging in the device:
Feb 15 00:00:15 hanf kernel: usb 3-2: new full speed USB device using address 3
Feb 15 00:00:15 hanf kernel: usb 3-2: Product: eHome Infrared Transceiver
Feb 15 00:00:15 hanf kernel: usb 3-2: Manufacturer: Philips
Feb 15 00:00:15 hanf kernel: usb 3-2: SerialNumber: PH001j68
Feb 15 00:00:21 hanf kernel: module lirc_philipsusb unsupported by
SUSE/Novell, tainting kernel.
Feb 15 00:00:21 hanf kernel:
Feb 15 00:00:21 hanf kernel: lirc_philipsusb: USB remote driver for LIRC v0.1
Feb 15 00:00:21 hanf kernel: lirc_philipsusb: Martin Blatter <[EMAIL PROTECTED]>
Feb 15 00:00:21 hanf kernel: lirc_philipsusb: debug mode enabled
Feb 15 00:00:21 hanf kernel: lirc_philipsusb: usb probe called
Feb 15 00:00:21 hanf kernel: lirc_philipsusb: current configuration 1,
current interface 0, num endpoints 2
Feb 15 00:00:21 hanf kernel: endpoint: length 0x7 descriptortype - 0x5
endpointaddress - 0x1 attributes 0x2 - packetsize 0x10 - interval 0x0
Feb 15 00:00:21 hanf kernel: endpoint: length 0x7 descriptortype - 0x5
endpointaddress - 0x81 attributes 0x2 - packetsize 0x10 - interval 0x0
Feb 15 00:00:21 hanf kernel: lirc_philipsusb: no acceptable endpoint found
Feb 15 00:00:21 hanf kernel: usbcore: registered new driver lirc_philipsusb
In another desperate attempt, I tried to send the three
USB_REQ_GET_DESCRIPTOR control
messages that appear in the USB Snoopy log. To no avail. They went
through fine but
still no interrupt pipes, just bulk.
What am I doing wrong?
martin
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