usb functino write on linux
Posted: Tue Dec 15, 2015 2:55 am
Linux oes not seem to be replying to my usb function writes? Windows seems to be ok.
I do see this with usbmon
> e.g. status code "-115"
Assuming x86 32, -115 = -EINPROGRESS, that means URB still pending, no results yet
This is my pipe set up.
My descriptor set up
Linux reports that is see's both pipes.
but uchar usbFunctionWrite(uchar *data, uchar len) is never called.
I do have a if(rq->bRequest == USBRQ_HID_SET_REPORT) return USB_NO_MSG; in my usbFunctionSetup but as mentioned windows is working so I know its done mostly correct. Seems its only linux based OS's.
I do see this with usbmon
> e.g. status code "-115"
Assuming x86 32, -115 = -EINPROGRESS, that means URB still pending, no results yet
Code: Select all
ffff8800089495c0 3713432687 S Ci:2:007:0 s a1 01 0302 0000 0005 8 <
ffff8800089495c0 3713436685 C Ci:2:007:0 0 5 = 02000201 01
ffff8800089495c0 3713436692 S Ci:2:007:0 s a1 01 0303 0000 0005 8 <
ffff8800089495c0 3713440574 C Ci:2:007:0 0 5 = 030101ff 01
ffff880008948f00 3713441250 S Io:2:007:1 -115:8 2 = 0c04
ffff880008948f00 3713445537 C Io:2:007:1 0:8 2 >
ffff880008948f00 3713445589 S Io:2:007:1 -115:8 2 = 0c04
ffff880008948f00 3713453546 C Io:2:007:1 0:8 2 >
ffff880008948f00 3713453577 S Io:2:007:1 -115:8 2 = 0c01
ffff880008948f00 3713461603 C Io:2:007:1 0:8 2 >This is my pipe set up.
Code: Select all
char my_usbDescriptorConfiguration[] = { /* USB configuration descriptor */
9, /* sizeof(usbDescriptorConfiguration): length of descriptor in bytes */
USBDESCR_CONFIG, /* descriptor type */
18 + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT + /*7 * USB_CFG_HAVE_INTRIN_ENDPOINT3*/ + 7 + 9, 0,
/* total length of data returned (including inlined descriptors) */
1, /* number of interfaces in this configuration */
1, /* index of this configuration */
0, /* configuration name string index */
USB_CFG_IS_SELF_POWERED, /* attributes */
USB_CFG_MAX_BUS_POWER/2, /* max USB current in 2mA units */
/* interface descriptor follows inline: */
9, /* sizeof(usbDescrInterface): length of descriptor in bytes */
USBDESCR_INTERFACE, /* descriptor type */
0, /* index of this interface */
0, /* alternate setting for this interface */
1 + USB_CFG_HAVE_INTRIN_ENDPOINT ,//+ USB_CFG_HAVE_INTRIN_ENDPOINT3, /* endpoints excl 0: number of endpoint descriptors to follow */
USB_CFG_INTERFACE_CLASS,
USB_CFG_INTERFACE_SUBCLASS,
USB_CFG_INTERFACE_PROTOCOL,
0, /* string index for interface */
9, /* sizeof(usbDescrHID): length of descriptor in bytes */
USBDESCR_HID, /* descriptor type: HID */
0x10, 0x01, /* BCD representation of HID version */
0x00, /* target country code */
0x01, /* number of HID Report (or other HID class) Descriptor infos to follow */
0x22, /* descriptor type: report */
USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH, 5, /* total length of report descriptor *///
//#endif
#if USB_CFG_HAVE_INTRIN_ENDPOINT /* endpoint descriptor for endpoint 1 */
7, /* sizeof(usbDescrEndpoint) */
USBDESCR_ENDPOINT, /* descriptor type = endpoint */
0x81, // bulk IN endpoint number 1
0x03, /* attrib: Interrupt endpoint */
8, 0, /* maximum packet size */
0x08, /* in ms*/
//the output.
7, // sizeof(usbDescrEndpoint)
5, // descriptor type = endpoint
0x01, // out endpoint number 2
0x03, // attrib: Interrupt endpoint
8, 0, // maximum packet size
0x08, // in ms
#endif
};
My descriptor set up
Code: Select all
unsigned usbFunctionDescriptor(struct usbRequest *rq)
{
if ((rq->bmRequestType & USBRQ_TYPE_MASK) != USBRQ_TYPE_STANDARD)
return 0;
if (rq->bRequest == USBRQ_GET_DESCRIPTOR)
{
// USB spec 9.4.3, high byte is descriptor type
switch (rq->wValue.bytes[1])
{
case USBDESCR_DEVICE:
usbMsgPtr = (void*)usbDescrDevice;
return getUsbDescrDevice_size();
case USBDESCR_HID_REPORT:
usbMsgPtr = (void*)analog_usbHidReportDescriptor;
return getAnalogUsbHidReportDescriptor_size();
case USBDESCR_CONFIG:
usbMsgPtr = my_usbDescriptorConfiguration;
return sizeof(my_usbDescriptorConfiguration);
}
}
return 0;
}
Linux reports that is see's both pipes.
Code: Select all
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 8
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 8but uchar usbFunctionWrite(uchar *data, uchar len) is never called.
I do have a if(rq->bRequest == USBRQ_HID_SET_REPORT) return USB_NO_MSG; in my usbFunctionSetup but as mentioned windows is working so I know its done mostly correct. Seems its only linux based OS's.