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Commit 5477b054 authored by Devdutt Patnaik's avatar Devdutt Patnaik Committed by Mayank Rana
Browse files

usb: gadget: Support endpoint allocation by ep name 



Implement support for allocating an EP based on name.
This allows a function driver to request an EP using an
ep name string. This is useful to request GSI specific
EPs.

CRs-Fixed: 946385
Change-Id: Id38e6e1e3c2d82f440c0507d24f18f808dc3e4dc
Signed-off-by: default avatarDevdutt Patnaik <dpatnaik@codeaurora.org>
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
parent 5f5dff01

drivers/usb/gadget/epautoconf.c

+38 −0
Original line number Diff line number Diff line
@@ -209,3 +209,41 @@ void usb_ep_autoconfig_reset (struct usb_gadget *gadget) 
	gadget->out_epnum = 0;

}

EXPORT_SYMBOL_GPL(usb_ep_autoconfig_reset);



/**

 * usb_ep_autoconfig_by_name - Used to pick the endpoint by name. eg ep1in-gsi

 * @gadget: The device to which the endpoint must belong.

 * @desc: Endpoint descriptor, with endpoint direction and transfer mode

 *	initialized.

 * @ep_name: EP name that is to be searched.

 *

 */

struct usb_ep *usb_ep_autoconfig_by_name(

			struct usb_gadget		*gadget,

			struct usb_endpoint_descriptor	*desc,

			const char			*ep_name

)

{

	struct usb_ep	*ep;

	bool ep_found = false;



	list_for_each_entry(ep, &gadget->ep_list, ep_list)

		if (strcmp(ep->name, ep_name) == 0 && !ep->driver_data) {

			ep_found = true;

			break;

		}



	if (ep_found) {

		desc->bEndpointAddress &= USB_DIR_IN;

		desc->bEndpointAddress |= ep->ep_num;

		ep->address = desc->bEndpointAddress;

		pr_debug("Allocating ep address:%x\n", ep->address);

		ep->desc = NULL;

		ep->comp_desc = NULL;

		return ep;

	}



	pr_err("%s:error finding ep %s\n", __func__, ep_name);

	return NULL;

}

EXPORT_SYMBOL(usb_ep_autoconfig_by_name);

include/linux/usb/gadget.h

+5 −0
Original line number Diff line number Diff line
@@ -297,6 +297,7 @@ struct usb_ep_caps { 
 * @comp_desc: In case of SuperSpeed support, this is the endpoint companion

 *	descriptor that is used to configure the endpoint

 * @ep_type: Used to specify type of EP eg. normal vs h/w accelerated.

 * @ep_num: Used EP number

 * @ep_intr_num: Interrupter number for EP.

 *

 * the bus controller driver lists all the general purpose endpoints in
@@ -322,6 +323,7 @@ struct usb_ep { 
	const struct usb_endpoint_descriptor	*desc;

	const struct usb_ss_ep_comp_descriptor	*comp_desc;

	enum ep_type		ep_type;

	u8			ep_num;

	u8			ep_intr_num;

};
@@ -984,6 +986,9 @@ extern struct usb_ep *usb_ep_autoconfig_ss(struct usb_gadget *, 
extern void usb_ep_autoconfig_release(struct usb_ep *);



extern void usb_ep_autoconfig_reset(struct usb_gadget *);

extern struct usb_ep *usb_ep_autoconfig_by_name(struct usb_gadget *gadget,

			struct usb_endpoint_descriptor *desc,

			const char *ep_name);



#ifdef CONFIG_USB_DWC3_MSM

int msm_ep_config(struct usb_ep *ep);