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Commit 505da987 authored by Jack Pham's avatar Jack Pham
Browse files

usb: dwc3-msm: Add usb_ep_autoconfig_by_name 



Add a helper function which a function driver such as f_gsi can
use to choose an endpoint by name, eg ep1in-gsi.

Change-Id: Id9fd42e423cb1c99c7c98a761dec0cd8bf150b82
Signed-off-by: default avatarJack Pham <jackp@codeaurora.org>
parent 5c3cf242

drivers/usb/dwc3/dwc3-msm.c

+45 −0
Original line number Diff line number Diff line
@@ -1861,6 +1861,51 @@ static int dbm_ep_config(struct dwc3_msm *mdwc, u8 usb_ep, u8 bam_pipe, 
	return dbm_ep;

}



/**

 * usb_ep_autoconfig_by_name - Used to pick the endpoint by name. eg gsi-epin1

 * @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;

	struct dwc3_ep *dep;

	bool ep_found = false;



	if (!ep_name || !strlen(ep_name))

		goto err;



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

		if (strncmp(ep->name, ep_name, strlen(ep_name)) == 0 &&

				!ep->driver_data) {

			ep_found = true;

			break;

		}



	if (ep_found) {

		dep = to_dwc3_ep(ep);

		desc->bEndpointAddress &= USB_DIR_IN;

		desc->bEndpointAddress |= dep->number >> 1;

		ep->address = desc->bEndpointAddress;

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

		ep->desc = NULL;

		ep->comp_desc = NULL;

		return ep;

	}



err:

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

	return NULL;

}

EXPORT_SYMBOL(usb_ep_autoconfig_by_name);



/**

 * Configure MSM endpoint.

 * This function do specific configurations

include/linux/usb/dwc3-msm.h

+6 −0
Original line number Diff line number Diff line
@@ -112,6 +112,8 @@ struct gsi_channel_info { 
};



#if IS_ENABLED(CONFIG_USB_DWC3_MSM)

struct usb_ep *usb_ep_autoconfig_by_name(struct usb_gadget *gadget,

		struct usb_endpoint_descriptor *desc, const char *ep_name);

int usb_gsi_ep_op(struct usb_ep *ep, void *op_data, enum gsi_ep_op op);

int msm_ep_config(struct usb_ep *ep, struct usb_request *request, u32 bam_opts);

int msm_ep_unconfig(struct usb_ep *ep);
@@ -121,6 +123,10 @@ int msm_data_fifo_config(struct usb_ep *ep, unsigned long addr, u32 size, 
bool msm_dwc3_reset_ep_after_lpm(struct usb_gadget *gadget);

int msm_dwc3_reset_dbm_ep(struct usb_ep *ep);

#else

static inline struct usb_ep *usb_ep_autoconfig_by_name(

		struct usb_gadget *gadget, struct usb_endpoint_descriptor *desc,

		const char *ep_name)

{ return NULL; }

static inline int usb_gsi_ep_op(struct usb_ep *ep, void *op_data,

		enum gsi_ep_op op)

{ return 0; }