From 21ddc2a860ca69eb92ab0c48c05187f89aa6a39a Mon Sep 17 00:00:00 2001 From: Li Jun Date: Thu, 9 Jul 2015 15:18:56 +0800 Subject: [PATCH] usb: gadget: multi: 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/multi.c | 37 +++++++++++++++++-------------- 1 file changed, 20 insertions(+), 17 deletions(-) diff --git a/drivers/usb/gadget/legacy/multi.c b/drivers/usb/gadget/legacy/multi.c index b21b51f0c9fa..c38ead1d67a4 100644 --- a/drivers/usb/gadget/legacy/multi.c +++ b/drivers/usb/gadget/legacy/multi.c @@ -78,21 +78,7 @@ static struct usb_device_descriptor device_desc = { .idProduct = cpu_to_le16(MULTI_PRODUCT_NUM), }; - -static const struct usb_descriptor_header *otg_desc[] = { - (struct usb_descriptor_header *) &(struct usb_otg_descriptor){ - .bLength = sizeof(struct usb_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, - }, - NULL, -}; - +static const struct usb_descriptor_header *otg_desc[2]; enum { MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX, @@ -429,14 +415,25 @@ static int __ref multi_bind(struct usb_composite_dev *cdev) goto fail_string_ids; 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 configurations */ status = rndis_config_register(cdev); if (unlikely(status < 0)) - goto fail_string_ids; + goto fail_otg_desc; status = cdc_config_register(cdev); if (unlikely(status < 0)) - goto fail_string_ids; + goto fail_otg_desc; usb_composite_overwrite_options(cdev, &coverwrite); /* we're done */ @@ -445,6 +442,9 @@ static int __ref multi_bind(struct usb_composite_dev *cdev) /* error recovery */ +fail_otg_desc: + kfree(otg_desc[0]); + otg_desc[0] = NULL; fail_string_ids: fsg_common_remove_luns(fsg_opts->common); fail_set_cdev: @@ -490,6 +490,9 @@ static int multi_unbind(struct usb_composite_dev *cdev) usb_put_function(f_ecm); usb_put_function_instance(fi_ecm); #endif + kfree(otg_desc[0]); + otg_desc[0] = NULL; + return 0; } -- 2.20.1