Changes

/dev/usb/ven (view source)

Revision as of 17:03, 27 October 2017

382 bytes added , 17:03, 27 October 2017

→‎Ioctls

Line 92: Line 92:

If it does, IPC_SUCCESS is returned, change callbacks are triggered and /dev/usb/usb ioctl 1 is issued.

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−

| 7 || SetAlternateSetting || 0x20 || None

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| 7 || SetAlternateSetting

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| calls /dev/usb/usb ioctl 5 ~~and~~/or 0x11

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| 0x20 bytes

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1-2: Device index<br>

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2-4: Device number<br>

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8-12: Alternate setting

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| None

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| Set the active alternate setting for a device.

+

Internally, this issues /dev/usb/usb ioctl 2 to get descriptors, loops over all endpoints and calls /dev/usb/usb ioctl 5 if <code>(bmAttributes & 3) == 1</code>. If all ioctls succeed, VEN calls /dev/usb/usb ioctl 0x11 with the device ID, alt setting and bInterfaceNumber (+ other unknown values).

|-

| 8 || ? || 0x20 || None

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