[RFC/PATCH 1/3] usb: Add SuperSpeed support to g_zero gadget

[Amit Blay <ablay-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>]

This patch adds SuperSpeed descriptors to the g_zero gadget.
The SuperSpeed descriptors were added both for f_soursesink and f_loopback
configurations of the g_zero gadget.

Signed-off-by: Tatyana Brokhman <tlinder-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Amit Blay <ablay-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>

---
 drivers/usb/gadget/f_loopback.c   |   55 ++++++++++++++++++++++++++++++++++++-
 drivers/usb/gadget/f_sourcesink.c |   55 ++++++++++++++++++++++++++++++++++++-
 drivers/usb/gadget/zero.c         |    2 +-
 3 files changed, 109 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/gadget/f_loopback.c b/drivers/usb/gadget/f_loopback.c
index 3756326..ca660d4 100644
--- a/drivers/usb/gadget/f_loopback.c
+++ b/drivers/usb/gadget/f_loopback.c
@@ -118,6 +118,49 @@ static struct usb_descriptor_header *hs_loopback_descs[] = {
 	NULL,
 };
 
+/* super speed support: */
+
+static struct usb_endpoint_descriptor ss_loop_source_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
+	.wMaxPacketSize =	cpu_to_le16(1024),
+};
+
+struct usb_ss_ep_comp_descriptor ss_loop_source_comp_desc = {
+	.bLength =		USB_DT_SS_EP_COMP_SIZE,
+	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
+	.bMaxBurst =		0,
+	.bmAttributes =		0,
+	.wBytesPerInterval =	0,
+};
+
+static struct usb_endpoint_descriptor ss_loop_sink_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
+	.wMaxPacketSize =	cpu_to_le16(1024),
+};
+
+struct usb_ss_ep_comp_descriptor ss_loop_sink_comp_desc = {
+	.bLength =		USB_DT_SS_EP_COMP_SIZE,
+	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
+	.bMaxBurst =		0,
+	.bmAttributes =		0,
+	.wBytesPerInterval =	0,
+};
+
+static struct usb_descriptor_header *ss_loopback_descs[] = {
+	(struct usb_descriptor_header *) &loopback_intf,
+	(struct usb_descriptor_header *) &ss_loop_source_desc,
+	(struct usb_descriptor_header *) &ss_loop_source_comp_desc,
+	(struct usb_descriptor_header *) &ss_loop_sink_desc,
+	(struct usb_descriptor_header *) &ss_loop_sink_comp_desc,
+	NULL,
+};
+
 /* function-specific strings: */
 
 static struct usb_string strings_loopback[] = {
@@ -175,8 +218,18 @@ autoconf_fail:
 		f->hs_descriptors = hs_loopback_descs;
 	}
 
+	/* support super speed hardware */
+	if (gadget_is_superspeed(c->cdev->gadget)) {
+		ss_loop_source_desc.bEndpointAddress =
+				fs_loop_source_desc.bEndpointAddress;
+		ss_loop_sink_desc.bEndpointAddress =
+				fs_loop_sink_desc.bEndpointAddress;
+		f->ss_descriptors = ss_loopback_descs;
+	}
+
 	DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
-			gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+	    (gadget_is_superspeed(c->cdev->gadget) ? "super" :
+	     (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
 			f->name, loop->in_ep->name, loop->out_ep->name);
 	return 0;
 }
diff --git a/drivers/usb/gadget/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c
index caf2f95..5247f07 100644
--- a/drivers/usb/gadget/f_sourcesink.c
+++ b/drivers/usb/gadget/f_sourcesink.c
@@ -131,6 +131,49 @@ static struct usb_descriptor_header *hs_source_sink_descs[] = {
 	NULL,
 };
 
+/* super speed support: */
+
+static struct usb_endpoint_descriptor ss_source_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
+	.wMaxPacketSize =	cpu_to_le16(1024),
+};
+
+struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
+	.bLength =		USB_DT_SS_EP_COMP_SIZE,
+	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
+	.bMaxBurst =		0,
+	.bmAttributes =		0,
+	.wBytesPerInterval =	0,
+};
+
+static struct usb_endpoint_descriptor ss_sink_desc = {
+	.bLength =		USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType =	USB_DT_ENDPOINT,
+
+	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
+	.wMaxPacketSize =	cpu_to_le16(1024),
+};
+
+struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
+	.bLength =		USB_DT_SS_EP_COMP_SIZE,
+	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
+	.bMaxBurst =		0,
+	.bmAttributes =		0,
+	.wBytesPerInterval =	0,
+};
+
+static struct usb_descriptor_header *ss_source_sink_descs[] = {
+	(struct usb_descriptor_header *) &source_sink_intf,
+	(struct usb_descriptor_header *) &ss_source_desc,
+	(struct usb_descriptor_header *) &ss_source_comp_desc,
+	(struct usb_descriptor_header *) &ss_sink_desc,
+	(struct usb_descriptor_header *) &ss_sink_comp_desc,
+	NULL,
+};
+
 /* function-specific strings: */
 
 static struct usb_string strings_sourcesink[] = {
@@ -187,8 +230,18 @@ autoconf_fail:
 		f->hs_descriptors = hs_source_sink_descs;
 	}
 
+	/* support super speed hardware */
+	if (gadget_is_superspeed(c->cdev->gadget)) {
+		ss_source_desc.bEndpointAddress =
+				fs_source_desc.bEndpointAddress;
+		ss_sink_desc.bEndpointAddress =
+				fs_sink_desc.bEndpointAddress;
+		f->ss_descriptors = ss_source_sink_descs;
+	}
+
 	DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
-			gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+	    (gadget_is_superspeed(c->cdev->gadget) ? "super" :
+	     (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
 			f->name, ss->in_ep->name, ss->out_ep->name);
 	return 0;
 }
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index af7e7c3..00e2fd2 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -340,7 +340,7 @@ static struct usb_composite_driver zero_driver = {
 	.name		= "zero",
 	.dev		= &device_desc,
 	.strings	= dev_strings,
-	.max_speed	= USB_SPEED_HIGH,
+	.max_speed	= USB_SPEED_SUPER,
 	.unbind		= zero_unbind,
 	.suspend	= zero_suspend,
 	.resume		= zero_resume,
-- 
1.7.3.3

--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.


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