I'm using the usb-skelton.c to write a usbdriver for a
USB device.
I want to use usb_control_msg function to read/write
registers.
If I want to read usb control register at 0x80 , how
do I fill in the paarmeter list "request"?

request_type
=USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_DEVICE
index = address (0x80)
value = parameter to set
request =?? 

Please advice


Thanks in advance



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