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/g_ffs.c | 42 ++++++++++++++++++++------------------- 1 file changed, 22 insertions(+), 20 deletions(-) diff --git a/drivers/usb/gadget/legacy/g_ffs.c b/drivers/usb/gadget/legacy/g_ffs.c index 7b9ef7e..a52d5b5 100644 --- a/drivers/usb/gadget/legacy/g_ffs.c +++ b/drivers/usb/gadget/legacy/g_ffs.c @@ -88,21 +88,7 @@ MODULE_PARM_DESC(bDeviceProtocol, "USB Device protocol"); module_param_array_named(functions, func_names, charp, &func_num, 0); MODULE_PARM_DESC(functions, "USB Functions list"); -static const struct usb_descriptor_header *gfs_otg_desc[] = { - (const struct usb_descriptor_header *) - &(const 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 *gfs_otg_desc[2]; /* String IDs are assigned dynamically */ static struct usb_string gfs_strings[] = { @@ -410,6 +396,17 @@ static int gfs_bind(struct usb_composite_dev *cdev) goto error_rndis; gfs_dev_desc.iProduct = gfs_strings[USB_GADGET_PRODUCT_IDX].id; + if (gadget_is_otg(cdev->gadget) && !gfs_otg_desc[0]) { + struct usb_descriptor_header *usb_desc; + + usb_desc = usb_otg_descriptor_alloc(cdev->gadget); + if (!usb_desc) + goto error_rndis; + usb_otg_descriptor_init(cdev->gadget, usb_desc); + gfs_otg_desc[0] = usb_desc; + gfs_otg_desc[1] = NULL; + } + for (i = 0; i < ARRAY_SIZE(gfs_configurations); ++i) { struct gfs_configuration *c = gfs_configurations + i; int sid = USB_GADGET_FIRST_AVAIL_IDX + i; @@ -419,6 +416,11 @@ static int gfs_bind(struct usb_composite_dev *cdev) c->c.bConfigurationValue = 1 + i; c->c.bmAttributes = USB_CONFIG_ATT_SELFPOWER; + if (gadget_is_otg(cdev->gadget)) { + c->c.descriptors = gfs_otg_desc; + c->c.bmAttributes |= USB_CONFIG_ATT_WAKEUP; + } + c->num = i; ret = usb_add_config(cdev, &c->c, gfs_do_config); @@ -430,6 +432,8 @@ static int gfs_bind(struct usb_composite_dev *cdev) /* TODO */ error_unbind: + kfree(gfs_otg_desc[0]); + gfs_otg_desc[0] = NULL; error_rndis: #ifdef CONFIG_USB_FUNCTIONFS_RNDIS usb_put_function_instance(fi_rndis); @@ -471,6 +475,9 @@ static int gfs_unbind(struct usb_composite_dev *cdev) for (i = 0; i < N_CONF * func_num; ++i) usb_put_function(*(f_ffs[0] + i)); + kfree(gfs_otg_desc[0]); + gfs_otg_desc[0] = NULL; + return 0; } @@ -488,11 +495,6 @@ static int gfs_do_config(struct usb_configuration *c) if (missing_funcs) return -ENODEV; - if (gadget_is_otg(c->cdev->gadget)) { - c->descriptors = gfs_otg_desc; - c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; - } - if (gc->eth) { ret = gc->eth(c); if (unlikely(ret < 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
