Hello,
Bill Good contacted me with an issue about hidraw. I'm forwarding it to
this list.
Alan.
On 08/07/2010 04:18 PM, Bill Good wrote:
On 08/07/2010 03:56 PM, Alan Ott wrote:
On 08/07/2010 03:54 PM, Alan Ott wrote:
On 08/07/2010 03:27 PM, Bill Good wrote:
On 08/06/2010 11:19 PM, Alan Ott wrote:
On 08/06/2010 09:24 PM, Bill Good wrote:
I do not mean to offend but you are the author of a change in hidraw
that might be a problem that I am seeing.
I write plugins for X-Plane for Saitek panels. I was doing some
testing
on Maverick Meerkat have found a problem and not sure where to
file the bug.
On the Saitek radio panel it has 4 five digit displays. I have
included
my test program and what I am seeing on the displays on 10.04 and
10.10.
What has appeared to change is the first char of the array is not
displayed in 10.04. It has to be the correct number or I will get a
broken pipe error.
Now on 10.10 it is displayed and works the same as it has to be a
1 for
my radio panel, any other number will give broken pipe error.
Not sure what changed but am looking for a solution.
int main (void) {
unsigned char buf[3];
int nr;
int nw;
int pos;
int fd = -1;
struct hidraw_devinfo dinfo;
if ((fd = open("/dev/saitekradiopanel5", O_RDWR))< 0) {
perror("hidraw open");
exit(1);
}
char wbuf[21] = {1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3,
4, 5, 6, 7, 8, 9};
nw=write(fd, wbuf, sizeof(wbuf));
if ( nw< 0 )
{ perror("write(stdout)"); exit(1); }
if ( nw != 21 ) {
fprintf(stderr, "Unsupported report length %d."
" Wrong hidraw device or kernel<2.6.26 ?\n", nw);
exit(1);
}
close(fd);
exit(0);
}
******************************************************************
****************** Display Info 10.04 ***********************
01234 56789
01234 56789
******************************************************************
******************************************************************
****************** Display Info 10.10 ***********************
10123 45678
90123 45678
******************************************************************
Hi Bill,
What kernel versions are you using (10.04 and 10.10) (uname -a)?
I assume you are talking about this patch:
http://lkml.org/lkml/2010/6/30/198
I assume your device uses the control endpoint for output
transfers (ie: it does not have an Interrupt OUT endpoint).
It looks like your device is using the entire output transfer and
not skipping the report ID as it should. My understanding is that
previous versions of the kernel had a bug in this respect, which
is why I made the patch linked above. From the data you have
provided, it appears that your device relied on this bug.
The method used in the new kernels (and apparently Ubuntu 10.10),
is consistent with the way Windows and Mac OS send data to HID
devices.
The fact that this is a commercial product though, makes me wonder
about my understanding of the USB spec, and about the validity of
this patch. (Jiri, any insight here?)
Can you send me the device descriptor for the device you are
controlling?
Can I forward your email to the linux-input and linux-kernel
mailing lists?
Please let me know if one or more of my assumptions is incorrect.
Alan.
Here is the info you requested and you can forward this email
anywhere it will help in resolving this.
[snip descriptor. updated one is below]
bill@bill-1004-32:~$ uname -a
Linux bill-1004-32 2.6.32-24-generic-pae #39-Ubuntu SMP Wed Jul 28
07:39:26 UTC 201bill@billsim-
*******************************************************************************************************
bill@billsim-1010-32:~/HIDTesting/HidRaw$ uname -a
Linux billsim-1010-32 2.6.35-14-generic-pae #19-Ubuntu SMP Mon Aug
2 03:24:07 UTC 2010 i686 GNU/Linux
bill@billsim-1010-32:~$ sudo lsusb -v -d 06a3:0d05
Bus 001 Device 029: ID 06a3:0d05 Saitek PLC
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x06a3 Saitek PLC
idProduct 0x0d05
bcdDevice 1.80
iManufacturer 1 Saitek
iProduct 2 Pro Flight Radio Panel
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 34
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 220mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.00
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 63
Report Descriptor: (length is 63)
Item(Global): Usage Page, data= [ 0x01 ] 1
Generic Desktop Controls
Item(Local ): Usage, data= [ 0x00 ] 0
Undefined
Item(Main ): Collection, data= [ 0x01 ] 1
Application
Item(Global): Usage Page, data= [ 0x09 ] 9
Buttons
Item(Local ): Usage Minimum, data= [ 0x01 ] 1
Button 1 (Primary)
Item(Local ): Usage Maximum, data= [ 0x18 ] 24
(null)
Item(Global): Logical Minimum, data= [ 0x00 ] 0
Item(Global): Logical Maximum, data= [ 0x01 ] 1
Item(Global): Report Size, data= [ 0x01 ] 1
Item(Global): Report Count, data= [ 0x18 ] 24
Item(Main ): Input, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position
Non_Volatile Bitfield
Item(Global): Usage Page, data= [ 0x01 0x00 ] 1
Generic Desktop Controls
Item(Local ): Usage Minimum, data= [ 0x01 ] 1
Pointer
Item(Local ): Usage Maximum, data= [ 0x14 ] 20
(null)
Item(Global): Logical Minimum, data= [ 0x00 ] 0
Item(Global): Logical Maximum, data= [ 0xff 0x00 ] 255
Item(Global): Report Size, data= [ 0x08 ] 8
Item(Global): Report Count, data= [ 0x14 ] 20
Item(Main ): Feature, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position
Non_Volatile Bitfield
Item(Global): Usage Page, data= [ 0x09 ] 9
Buttons
Item(Local ): Usage Minimum, data= [ 0x01 ] 1
Button 1 (Primary)
Item(Local ): Usage Maximum, data= [ 0x0e ] 14
(null)
Item(Global): Logical Minimum, data= [ 0x00 ] 0
Item(Global): Logical Maximum, data= [ 0x01 ] 1
Item(Global): Report Size, data= [ 0x01 ] 1
Item(Global): Report Count, data= [ 0x0e ] 14
Item(Main ): Feature, data= [ 0x02 ] 2
Data Variable Absolute No_Wrap Linear
Preferred_State No_Null_Position
Non_Volatile Bitfield
Item(Global): Report Size, data= [ 0x02 ] 2
Item(Global): Report Count, data= [ 0x01 ] 1
Item(Main ): Feature, data= [ 0x01 ] 1
Constant Array Absolute No_Wrap Linear
Preferred_State No_Null_Position
Non_Volatile Bitfield
Item(Main ): End Collection, data=none
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 10
Device Status: 0x0000
(Bus Powered)
Bill
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