1 // SPDX-License-Identifier: GPL-2.0+
3  * epautoconf.c -- endpoint autoconfiguration for usb gadget drivers
20  * usb_ep_autoconfig_ss() - choose an endpoint matching the ep
25  *    size must also be initialized.  This is modified on
44  * Also, high and full speed descriptors will be different.
54  * is initialized as if the endpoint were used at full speed and
59  * assigning ep->claimed to true.
71 	if (gadget->ops->match_ep) {  in usb_ep_autoconfig_ss()
72 		ep = gadget->ops->match_ep(gadget, desc, ep_comp);  in usb_ep_autoconfig_ss()
78 	list_for_each_entry (ep, &gadget->ep_list, ep_list) {  in usb_ep_autoconfig_ss()
91 	if (desc->wMaxPacketSize == 0)  in usb_ep_autoconfig_ss()
92 		desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket_limit);  in usb_ep_autoconfig_ss()
95 	desc->bEndpointAddress &= USB_DIR_IN;  in usb_ep_autoconfig_ss()
96 	if (isdigit(ep->name[2])) {  in usb_ep_autoconfig_ss()
97 		u8 num = simple_strtoul(&ep->name[2], NULL, 10);  in usb_ep_autoconfig_ss()
98 		desc->bEndpointAddress |= num;  in usb_ep_autoconfig_ss()
99 	} else if (desc->bEndpointAddress & USB_DIR_IN) {  in usb_ep_autoconfig_ss()
100 		if (++gadget->in_epnum > 15)  in usb_ep_autoconfig_ss()
102 		desc->bEndpointAddress = USB_DIR_IN | gadget->in_epnum;  in usb_ep_autoconfig_ss()
104 		if (++gadget->out_epnum > 15)  in usb_ep_autoconfig_ss()
106 		desc->bEndpointAddress |= gadget->out_epnum;  in usb_ep_autoconfig_ss()
109 	ep->address = desc->bEndpointAddress;  in usb_ep_autoconfig_ss()
110 	ep->desc = NULL;  in usb_ep_autoconfig_ss()
111 	ep->comp_desc = NULL;  in usb_ep_autoconfig_ss()
112 	ep->claimed = true;  in usb_ep_autoconfig_ss()
118  * usb_ep_autoconfig() - choose an endpoint matching the
123  *	size must also be initialized.  This is modified on success.
133  * Also, high and full speed descriptors will be different.
142  * is initialized as if the endpoint were used at full speed. Because of
145  * claims it by assigning ep->claimed to true.
161 	type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;  in usb_ep_autoconfig()
163 	/* report (variable) full speed bulk maxpacket */  in usb_ep_autoconfig()
165 		int size = ep->maxpacket_limit;  in usb_ep_autoconfig()  local
167 		/* min() doesn't work on bitfields with gcc-3.5 */  in usb_ep_autoconfig()
168 		if (size > 64)  in usb_ep_autoconfig()
169 			size = 64;  in usb_ep_autoconfig()
170 		desc->wMaxPacketSize = cpu_to_le16(size);  in usb_ep_autoconfig()
178  * usb_ep_autoconfig_release - releases endpoint and set it to initial state
189 	ep->claimed = false;  in usb_ep_autoconfig_release()
190 	ep->driver_data = NULL;  in usb_ep_autoconfig_release()
195  * usb_ep_autoconfig_reset - reset endpoint autoconfig state
200  * state such as ep->claimed and the record of assigned endpoints
207 	list_for_each_entry (ep, &gadget->ep_list, ep_list) {  in usb_ep_autoconfig_reset()
208 		ep->claimed = false;  in usb_ep_autoconfig_reset()
209 		ep->driver_data = NULL;  in usb_ep_autoconfig_reset()
211 	gadget->in_epnum = 0;  in usb_ep_autoconfig_reset()
212 	gadget->out_epnum = 0;  in usb_ep_autoconfig_reset()