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usb: gadget: multi: 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 15:18:56 +08:00 committed by Felipe Balbi
parent d867889797
commit 21ddc2a860
1 changed files with 20 additions and 17 deletions
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37
drivers/usb/gadget/legacy/multi.c
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@ -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;
}