1 // SPDX-License-Identifier: GPL-2.0+
3  * zero.c -- Gadget Zero, for USB development
5  * Copyright (C) 2003-2008 David Brownell
11  * can write a hardware-agnostic gadget driver running inside a USB device.
15  * test of your device-side usb stack, or with "usb-skeleton".
32  * driver assumes self-powered hardware, and
46 /*-------------------------------------------------------------------------*/
71 /*-------------------------------------------------------------------------*/
75  * DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
76  * Instead:  allocate your own, using normal USB-IF procedures.
80 #define DRIVER_PRODUCT_NUM	0xa4a0		/* Linux-USB "Gadget Zero" */
83 #define DRIVER_VENDOR_NUM	0x1a0a		/* OTG test device IDs */
89  * functional coverage for the "USBCV" test harness from USB-IF.
108 /*-------------------------------------------------------------------------*/
124 /* string IDs are assigned dynamically */
141 	.language	= 0x0409,	/* en-us */
150 /*-------------------------------------------------------------------------*/
158 	struct usb_gadget		*g = cdev->gadget;  in zero_autoresume()
161 	if (!cdev->config)  in zero_autoresume()
168 	if (g->speed != USB_SPEED_UNKNOWN) {  in zero_autoresume()
170 		INFO(cdev, "%s --> %d\n", __func__, status);  in zero_autoresume()
176 	if (cdev->gadget->speed == USB_SPEED_UNKNOWN)  in zero_suspend()
200 /*-------------------------------------------------------------------------*/
213 		const struct usb_ctrlrequest *ctrl)  in ss_config_setup()  argument
215 	switch (ctrl->bRequest) {  in ss_config_setup()
218 		return func_ss->setup(func_ss, ctrl);  in ss_config_setup()
220 		return -EOPNOTSUPP;  in ss_config_setup()
238 MODULE_PARM_DESC(isoc_interval, "1 - 16");
242 MODULE_PARM_DESC(isoc_maxpacket, "0 - 1023 (fs), 0 - 1024 (hs/ss)");
245 MODULE_PARM_DESC(isoc_mult, "0 - 2 (hs/ss only)");
249 MODULE_PARM_DESC(isoc_maxburst, "0 - 15 (ss only)");
290 	ss_opts->pattern = gzero_options.pattern;  in zero_bind()
291 	ss_opts->isoc_interval = gzero_options.isoc_interval;  in zero_bind()
292 	ss_opts->isoc_maxpacket = gzero_options.isoc_maxpacket;  in zero_bind()
293 	ss_opts->isoc_mult = gzero_options.isoc_mult;  in zero_bind()
294 	ss_opts->isoc_maxburst = gzero_options.isoc_maxburst;  in zero_bind()
295 	ss_opts->bulk_buflen = gzero_options.bulk_buflen;  in zero_bind()
296 	ss_opts->bulk_qlen = gzero_options.ss_bulk_qlen;  in zero_bind()
297 	ss_opts->iso_qlen = gzero_options.ss_iso_qlen;  in zero_bind()
312 	lb_opts->bulk_buflen = gzero_options.bulk_buflen;  in zero_bind()
313 	lb_opts->qlen = gzero_options.qlen;  in zero_bind()
336 	if (gadget_is_otg(cdev->gadget)) {  in zero_bind()
340 			usb_desc = usb_otg_descriptor_alloc(cdev->gadget);  in zero_bind()
342 				status = -ENOMEM;  in zero_bind()
345 			usb_otg_descriptor_init(cdev->gadget, usb_desc);  in zero_bind()
369 	usb_ep_autoconfig_reset(cdev->gadget);  in zero_bind()
374 	usb_ep_autoconfig_reset(cdev->gadget);  in zero_bind()