219
edits
Changes
→Ioctls
Line 48:
Line 48:
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| Releases the device change callback with 0 as return code.
| Releases the device change callback with 0 as return code.
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|-
−| 3 || GetDeviceInfo || 0x20 || 0xc0
+| 3 || GetDeviceInfo ||
−| calls /dev/usb/usb ioctl 2
+0x20 bytes
+1-2: Device index<br>
+2-4: Device number
+(0-4 is considered as a whole as as the device ID, but IOS only cares about these two values.)
+| 0xc0 bytes (memset to 0)
+20-40: Device descriptor<br>
+40-52: Config descriptor<br>
+52-64: Interface descriptor<br>
+64-72: Endpoint descriptors (interface.bNumEndpoints times)
+| Get USB descriptors for a device. Behind the scenes, calls /dev/usb/usb ioctl 2 (input: internal ID, output: descriptors) and copies information to the output buffer and the internal device struct.
+The descriptor structures match the ones used by libusb (with padding).
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| 4 || ? || 0x20 || None
| 4 || ? || 0x20 || None