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 <[email protected]> --- drivers/usb/gadget/legacy/cdc2.c | 44 +++++++++++++++++++++------------------- 1 file changed, 23 insertions(+), 21 deletions(-) diff --git a/drivers/usb/gadget/legacy/cdc2.c b/drivers/usb/gadget/legacy/cdc2.c index afd3e37..531b8e0 100644 --- a/drivers/usb/gadget/legacy/cdc2.c +++ b/drivers/usb/gadget/legacy/cdc2.c @@ -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[] = { @@ -108,11 +94,6 @@ static int cdc_do_config(struct usb_configuration *c) { int status; - if (gadget_is_otg(c->cdev->gadget)) { - c->descriptors = otg_desc; - c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; - } - f_ecm = usb_get_function(fi_ecm); if (IS_ERR(f_ecm)) { status = PTR_ERR(f_ecm); @@ -193,10 +174,25 @@ 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)) { + if (!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; + } + cdc_config_driver.descriptors = otg_desc; + cdc_config_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; + } + /* 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 +200,9 @@ 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 +218,9 @@ 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; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
