I'm trying to create an HID Gadget joystick/mouse using the g_hid module
on an OMAP3530. It's kind of a monstrosity of an input device. I've
added this to my platform code:
static struct hidg_func_descriptor my_joystick_data = {
.subclass = 0,
.protocol = 0,
.report_length = 10,
.report_desc_length= 50,
.report_desc= {
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x04, // USAGE (Joystick)
0xa1, 0x01, // COLLECTION (Application)
0x09, 0x01, // USAGE (Pointer)
0xa1, 0x00, // COLLECTION (Physical)
0x15, 0x81, // LOGICAL_MINIMUM (-127)
0x25, 0x7f, // LOGICAL_MAXIMUM (127)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x06, // REPORT_COUNT (6)
0x09, 0x30, // USAGE (X)
0x09, 0x31, // USAGE (Y)
0x09, 0x32, // USAGE (Z)
0x09, 0x33, // USAGE (Rx)
0x09, 0x34, // USAGE (Ry)
0x09, 0x35, // USAGE (Rz)
0x81, 0x02, // INPUT (Data,Var,Abs)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x75, 0x01, // REPORT_SIZE (1)
0x95, 0x20, // REPORT_COUNT (32)
0x05, 0x09, // USAGE_PAGE (Button)
0x19, 0x01, // USAGE_MINIMUM (Button 1)
0x29, 0x20, // USAGE_MAXIMUM (Button
32)
0x81, 0x02, // INPUT (Data,Var,Abs)
0xc0, // END_COLLECTION
0xc0 // END_COLLECTION
}
};
static struct platform_device my_joystick_hid = {
.name = "hidg",
.id = 0,
.num_resources = 0,
.resource = 0,
.dev = {
.platform_data = &my_joystick_data,
}
};
static struct hidg_func_descriptor my_mouse_data = {
.subclass = 0,
.protocol = 0,
.report_length = 3,
.report_desc_length= 50,
.report_desc= {
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x02, // USAGE (Mouse)
0xa1, 0x01, // COLLECTION (Application)
0x09, 0x01, // USAGE (Pointer)
0xa1, 0x00, // COLLECTION (Physical)
0x05, 0x09, // USAGE_PAGE (Button)
0x19, 0x01, // USAGE_MINIMUM (Button 1)
0x29, 0x03, // USAGE_MAXIMUM (Button 3)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x25, 0x01, // LOGICAL_MAXIMUM (1)
0x95, 0x03, // REPORT_COUNT (3)
0x75, 0x01, // REPORT_SIZE (1)
0x81, 0x02, // INPUT (Data,Var,Abs)
0x95, 0x01, // REPORT_COUNT (1)
0x75, 0x05, // REPORT_SIZE (5)
0x81, 0x03, // INPUT (Cnst,Var,Abs)
0x05, 0x01, // USAGE_PAGE (Generic Desktop)
0x09, 0x30, // USAGE (X)
0x09, 0x31, // USAGE (Y)
0x15, 0x81, // LOGICAL_MINIMUM (-127)
0x25, 0x7f, // LOGICAL_MAXIMUM (127)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x02, // REPORT_COUNT (2)
0x81, 0x06, // INPUT (Data,Var,Rel)
0xc0, // END_COLLECTION
0xc0 // END_COLLECTION
}
};
static struct platform_device my_mouse_hid = {
.name = "hidg",
.id = 1,
.num_resources = 0,
.resource = 0,
.dev = {
.platform_data = &my_mouse_data,
}
};
I've called platform_device_register for each platform device. If I plug
this thing into a machine running ubuntu, it seems to be recognized as a
mouse and a joystick, and everything seems to behave as expected, with
/dev/hidg0 and /dev/hidg1 transmitting messages over usb. On a windows
machine, however, it doesn't seem to be recognized. If I comment the
'mouse' portion out, windows sees it as a gamepad just fine.
Am I missing something? How do I properly implement a composite USB HID
device like this?
Thanks a lot!
-Woody
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