From 578aa8a2b12cb4cc3cfdb6ccd56af9f5f0dd6118 Mon Sep 17 00:00:00 2001 From: Li Jun Date: Thu, 9 Jul 2015 15:18:50 +0800 Subject: [PATCH] usb: gadget: acm_ms: 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: Li Jun Reviewed-by: Roger Quadros Signed-off-by: Felipe Balbi --- drivers/usb/gadget/legacy/acm_ms.c | 35 ++++++++++++++++-------------- 1 file changed, 19 insertions(+), 16 deletions(-) diff --git a/drivers/usb/gadget/legacy/acm_ms.c b/drivers/usb/gadget/legacy/acm_ms.c index 1194b09ae746..4d8adb48b8a7 100644 --- a/drivers/usb/gadget/legacy/acm_ms.c +++ b/drivers/usb/gadget/legacy/acm_ms.c @@ -58,21 +58,7 @@ static struct usb_device_descriptor device_desc = { /*.bNumConfigurations = DYNAMIC*/ }; -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[] = { @@ -225,10 +211,21 @@ static int acm_ms_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 fail_string_ids; + usb_otg_descriptor_init(gadget, usb_desc); + otg_desc[0] = usb_desc; + otg_desc[1] = NULL; + } + /* register our configuration */ status = usb_add_config(cdev, &acm_ms_config_driver, acm_ms_do_config); if (status < 0) - goto fail_string_ids; + goto fail_otg_desc; usb_composite_overwrite_options(cdev, &coverwrite); dev_info(&gadget->dev, "%s, version: " DRIVER_VERSION "\n", @@ -236,6 +233,9 @@ static int acm_ms_bind(struct usb_composite_dev *cdev) return 0; /* error recovery */ +fail_otg_desc: + kfree(otg_desc[0]); + otg_desc[0] = NULL; fail_string_ids: fsg_common_remove_luns(opts->common); fail_set_cdev: @@ -255,6 +255,9 @@ static int acm_ms_unbind(struct usb_composite_dev *cdev) usb_put_function_instance(fi_msg); usb_put_function(f_acm); usb_put_function_instance(f_acm_inst); + kfree(otg_desc[0]); + otg_desc[0] = NULL; + return 0; } -- 2.20.1