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Commit d8678897 authored by Li Jun's avatar Li Jun Committed by Felipe Balbi
Browse files

usb: gadget: mass_storage: allocate and init otg descriptor by otg capabilities 



Allocate and initialize usb otg descriptor according to gadget otg
capabilities, add it for each usb configurations. If otg capability
is not defined, keep its original otg descriptor unchanged.

Signed-off-by: default avatarLi Jun <jun.li@freescale.com>
Reviewed-by: default avatarRoger Quadros <rogerq@ti.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent d9e18679

drivers/usb/gadget/legacy/mass_storage.c

+19 −16
Original line number Diff line number Diff line
@@ -64,21 +64,7 @@ static struct usb_device_descriptor msg_device_desc = { 
	.bNumConfigurations =	1,

};



static struct usb_otg_descriptor otg_descriptor = {

	.bLength =		sizeof otg_descriptor,

	.bDescriptorType =	USB_DT_OTG,



	/*

	 * REVISIT SRP-only hardware is possible, although

	 * it would not be called "OTG" ...

	 */

	.bmAttributes =		USB_OTG_SRP | USB_OTG_HNP,

};



static const struct usb_descriptor_header *otg_desc[] = {

	(struct usb_descriptor_header *) &otg_descriptor,

	NULL,

};

static const struct usb_descriptor_header *otg_desc[2];



static struct usb_string strings_dev[] = {

	[USB_GADGET_MANUFACTURER_IDX].s = "",
@@ -214,9 +200,20 @@ static int msg_bind(struct usb_composite_dev *cdev) 
		goto fail_string_ids;

	msg_device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;



	if (gadget_is_otg(cdev->gadget) && !otg_desc[0]) {

		struct usb_descriptor_header *usb_desc;



		usb_desc = usb_otg_descriptor_alloc(cdev->gadget);

		if (!usb_desc)

			goto fail_string_ids;

		usb_otg_descriptor_init(cdev->gadget, usb_desc);

		otg_desc[0] = usb_desc;

		otg_desc[1] = NULL;

	}



	status = usb_add_config(cdev, &msg_config_driver, msg_do_config);

	if (status < 0)

		goto fail_string_ids;

		goto fail_otg_desc;



	usb_composite_overwrite_options(cdev, &coverwrite);

	dev_info(&cdev->gadget->dev,
@@ -224,6 +221,9 @@ static int msg_bind(struct usb_composite_dev *cdev) 
	set_bit(0, &msg_registered);

	return 0;



fail_otg_desc:

	kfree(otg_desc[0]);

	otg_desc[0] = NULL;

fail_string_ids:

	fsg_common_remove_luns(opts->common);

fail_set_cdev:
@@ -243,6 +243,9 @@ static int msg_unbind(struct usb_composite_dev *cdev) 
	if (!IS_ERR(fi_msg))

		usb_put_function_instance(fi_msg);



	kfree(otg_desc[0]);

	otg_desc[0] = NULL;



	return 0;

}