最終更新:2014-06-11 (水) 17:40:14 (1748d)  

hidg_func_descriptor はてなブックマークを見る
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struct hidg_func_descriptor {
        unsigned char           subclass;
        unsigned char           protocol;
        unsigned short          report_length;
        unsigned short          report_desc_length;
        unsigned char           report_desc[];
};

  • kernel.org/doc/Documentation/usb/gadget_hid.txt
  • drivers/usb/gadget/hid.cに書く
    /* hid descriptor for a keyboard */
    static struct hidg_func_descriptor my_hid_data = {
    	.subclass		= 0, /* No subclass */
    	.protocol		= 1, /* Keyboard */
    	.report_length		= 8,
    	.report_desc_length	= 63,
    	.report_desc		= {
    		0x05, 0x01,	/* USAGE_PAGE (Generic Desktop)	          */
    		0x09, 0x06,	/* USAGE (Keyboard)                       */
    		0xa1, 0x01,	/* COLLECTION (Application)               */
    		0x05, 0x07,	/*   USAGE_PAGE (Keyboard)                */
    		0x19, 0xe0,	/*   USAGE_MINIMUM (Keyboard LeftControl) */
    		0x29, 0xe7,	/*   USAGE_MAXIMUM (Keyboard Right GUI)   */
    		0x15, 0x00,	/*   LOGICAL_MINIMUM (0)                  */
    		0x25, 0x01,	/*   LOGICAL_MAXIMUM (1)                  */
    		0x75, 0x01,	/*   REPORT_SIZE (1)                      */
    		0x95, 0x08,	/*   REPORT_COUNT (8)                     */
    		0x81, 0x02,	/*   INPUT (Data,Var,Abs)                 */
    		0x95, 0x01,	/*   REPORT_COUNT (1)                     */
    		0x75, 0x08,	/*   REPORT_SIZE (8)                      */
    		0x81, 0x03,	/*   INPUT (Cnst,Var,Abs)                 */
    		0x95, 0x05,	/*   REPORT_COUNT (5)                     */
    		0x75, 0x01,	/*   REPORT_SIZE (1)                      */
    		0x05, 0x08,	/*   USAGE_PAGE (LEDs)                    */
    		0x19, 0x01,	/*   USAGE_MINIMUM (Num Lock)             */
    		0x29, 0x05,	/*   USAGE_MAXIMUM (Kana)                 */
    		0x91, 0x02,	/*   OUTPUT (Data,Var,Abs)                */
    		0x95, 0x01,	/*   REPORT_COUNT (1)                     */
    		0x75, 0x03,	/*   REPORT_SIZE (3)                      */
    		0x91, 0x03,	/*   OUTPUT (Cnst,Var,Abs)                */
    		0x95, 0x06,	/*   REPORT_COUNT (6)                     */
    		0x75, 0x08,	/*   REPORT_SIZE (8)                      */
    		0x15, 0x00,	/*   LOGICAL_MINIMUM (0)                  */
    		0x25, 0x65,	/*   LOGICAL_MAXIMUM (101)                */
    		0x05, 0x07,	/*   USAGE_PAGE (Keyboard)                */
    		0x19, 0x00,	/*   USAGE_MINIMUM (Reserved)             */
    		0x29, 0x65,	/*   USAGE_MAXIMUM (Keyboard Application) */
    		0x81, 0x00,	/*   INPUT (Data,Ary,Abs)                 */
    		0xc0		/* END_COLLECTION                         */
    	}
    };
    static struct platform_device my_hid = {
    	.name			= "hidg",
    	.id			= 0,
    	.num_resources		= 0,
    	.resource		= 0,
    	.dev.platform_data	= &my_hid_data,
    };
    platform_device_register(&my_hid);

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