Merge tag 'gadget-for-v3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

USB: Gadget: changes for 3.4

This merge is rather big. Here's what it contains:

For am5536udc we have just simple coding style fixes. Nothing that has any
potential to cause any issues going forward.

With mv_udc, there's only one single change removing an unneeded NULL check.

at91_udc also only saw a single change this merge window, and that's only
removing a duplicated header.

The Renesas controller has a few more involved changes. Support for SUDMAC was
added, there's now a special handling of IRQ resources for when the IRQ line is
shared between Renesas controller and SUDMAC, we also had a bug fix where
Renesas controller would sleep in atomic context while doing DMA transfers from
a tasklet. There were also a set of minor cleanups.

The FSL UDC also had a scheduling in atomic context bug fix, but that's all.

Thanks to Sebastian, the dummy_hcd now works better than ever with support for
scatterlists and streams. Sebastian also added SuperSpeed descriptors to the
serial gadgets.

The highlight on this merge is the addition of a generic API for mapping and
unmapping usb_requests. This will avoid code duplication on all UDC controllers
and also kills all the defines for DMA_ADDR_INVALID which UDC controllers
sprinkled around. A few of the UDC controllers were already converted to use
this new API.

Conflicts:
	drivers/usb/dwc3/gadget.c

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/usb/gadget/f_ecm.c b/drivers/usb/gadget/f_ecm.c
index 11c07cb7d337..30b908f2a53d 100644
--- a/drivers/usb/gadget/f_ecm.c
+++ b/drivers/usb/gadget/f_ecm.c
@@ -97,6 +97,20 @@ static inline unsigned ecm_bitrate(struct usb_gadget *g)
 
 /* interface descriptor: */
 
+static struct usb_interface_assoc_descriptor
+ecm_iad_descriptor = {
+	.bLength =		sizeof ecm_iad_descriptor,
+	.bDescriptorType =	USB_DT_INTERFACE_ASSOCIATION,
+
+	/* .bFirstInterface =	DYNAMIC, */
+	.bInterfaceCount =	2,	/* control + data */
+	.bFunctionClass =	USB_CLASS_COMM,
+	.bFunctionSubClass =	USB_CDC_SUBCLASS_ETHERNET,
+	.bFunctionProtocol =	USB_CDC_PROTO_NONE,
+	/* .iFunction =		DYNAMIC */
+};
+
+
 static struct usb_interface_descriptor ecm_control_intf = {
 	.bLength =		sizeof ecm_control_intf,
 	.bDescriptorType =	USB_DT_INTERFACE,
@@ -199,6 +213,7 @@ static struct usb_endpoint_descriptor fs_ecm_out_desc = {
 
 static struct usb_descriptor_header *ecm_fs_function[] = {
 	/* CDC ECM control descriptors */
+	(struct usb_descriptor_header *) &ecm_iad_descriptor,
 	(struct usb_descriptor_header *) &ecm_control_intf,
 	(struct usb_descriptor_header *) &ecm_header_desc,
 	(struct usb_descriptor_header *) &ecm_union_desc,
@@ -247,6 +262,7 @@ static struct usb_endpoint_descriptor hs_ecm_out_desc = {
 
 static struct usb_descriptor_header *ecm_hs_function[] = {
 	/* CDC ECM control descriptors */
+	(struct usb_descriptor_header *) &ecm_iad_descriptor,
 	(struct usb_descriptor_header *) &ecm_control_intf,
 	(struct usb_descriptor_header *) &ecm_header_desc,
 	(struct usb_descriptor_header *) &ecm_union_desc,
@@ -339,6 +355,7 @@ static struct usb_string ecm_string_defs[] = {
 	[0].s = "CDC Ethernet Control Model (ECM)",
 	[1].s = NULL /* DYNAMIC */,
 	[2].s = "CDC Ethernet Data",
+	[3].s = "CDC ECM",
 	{  } /* end of list */
 };
 
@@ -674,6 +691,7 @@ ecm_bind(struct usb_configuration *c, struct usb_function *f)
 	if (status < 0)
 		goto fail;
 	ecm->ctrl_id = status;
+	ecm_iad_descriptor.bFirstInterface = status;
 
 	ecm_control_intf.bInterfaceNumber = status;
 	ecm_union_desc.bMasterInterface0 = status;
@@ -864,6 +882,13 @@ ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN])
 			return status;
 		ecm_string_defs[1].id = status;
 		ecm_desc.iMACAddress = status;
+
+		/* IAD label */
+		status = usb_string_id(c->cdev);
+		if (status < 0)
+			return status;
+		ecm_string_defs[3].id = status;
+		ecm_iad_descriptor.iFunction = status;
 	}
 
 	/* allocate and initialize one new instance */