Hello, I am trying to understand article on reverse engineering usb driver, published in http://www.linuxjournal.com/node/7353/print (2004) I have difficulties understanding the input to the function usb_control_msg() especially the 0x12, 0xc8 numbers. I could not find them in the article, then tried even in the delcom datasheet, but did not find it there too. These numbers refer to __u8 request, __u8 requesttype , value, and index, but I could not understand how they are figured it out in the article. usb_control_msg(led->udev, usb_sndctrlpipe(led->udev, 0), 0x12, <<------- ? 0xc8, <<------ ? (0x02 * 0x100) + 0x0a, <------ ? (0x00 * 0x100) + color, <------ ? buffer, 8, 2 * HZ); Thanks for any comment, Ran -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
