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usb: gadget: cdc2: allocate and init otg descriptor by otg capabilities

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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: Li Jun <jun.li@freescale.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Li Jun 2015-07-09 15:18:52 +08:00 committed by Felipe Balbi
parent 56023ce0fd
commit ab6796ae98
1 changed files with 19 additions and 16 deletions
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35
drivers/usb/gadget/legacy/cdc2.c
View file

@ -60,21 +60,7 @@ static struct usb_device_descriptor 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];
/* string IDs are assigned dynamically */
static struct usb_string strings_dev[] = {
@ -193,10 +179,21 @@ static int cdc_bind(struct usb_composite_dev *cdev)
device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
if (gadget_is_otg(gadget) && !otg_desc[0]) {
struct usb_descriptor_header *usb_desc;
usb_desc = usb_otg_descriptor_alloc(gadget);
if (!usb_desc)
goto fail1;
usb_otg_descriptor_init(gadget, usb_desc);
otg_desc[0] = usb_desc;
otg_desc[1] = NULL;
}
/* register our configuration */
status = usb_add_config(cdev, &cdc_config_driver, cdc_do_config);
if (status < 0)
goto fail1;
goto fail2;
usb_composite_overwrite_options(cdev, &coverwrite);
dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n",
@ -204,6 +201,9 @@ static int cdc_bind(struct usb_composite_dev *cdev)
return 0;
fail2:
kfree(otg_desc[0]);
otg_desc[0] = NULL;
fail1:
usb_put_function_instance(fi_serial);
fail:
@ -219,6 +219,9 @@ static int cdc_unbind(struct usb_composite_dev *cdev)
usb_put_function(f_ecm);
if (!IS_ERR_OR_NULL(fi_ecm))
usb_put_function_instance(fi_ecm);
kfree(otg_desc[0]);
otg_desc[0] = NULL;
return 0;
}