usb: gadget: add usb3.0 descriptors to serial gadgets

This patch adds SS descriptors to the ACM & generic serial gadget. The
ACM part was tested with minicom + dummy + send / receive files over
ttyACM <=> ttyGS0.
The generic serial part (f_serial) was not tested (haven't found a
driver on the host side).
The nokia & multi gadget use HS at most.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

3 files changed, 93 insertions, 1 deletions

diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index e48212195466..d672250a61fa 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -237,6 +237,42 @@ static struct usb_descriptor_header *acm_hs_function[] = {
         NULL,
 };
 
+static struct usb_endpoint_descriptor acm_ss_in_desc = {
+        .bLength =              USB_DT_ENDPOINT_SIZE,
+        .bDescriptorType =      USB_DT_ENDPOINT,
+        .bmAttributes =         USB_ENDPOINT_XFER_BULK,
+        .wMaxPacketSize =       cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor acm_ss_out_desc = {
+        .bLength =              USB_DT_ENDPOINT_SIZE,
+        .bDescriptorType =      USB_DT_ENDPOINT,
+        .bmAttributes =         USB_ENDPOINT_XFER_BULK,
+        .wMaxPacketSize =       cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor acm_ss_bulk_comp_desc = {
+        .bLength =              sizeof acm_ss_bulk_comp_desc,
+        .bDescriptorType =      USB_DT_SS_ENDPOINT_COMP,
+};
+
+static struct usb_descriptor_header *acm_ss_function[] = {
+        (struct usb_descriptor_header *) &acm_iad_descriptor,
+        (struct usb_descriptor_header *) &acm_control_interface_desc,
+        (struct usb_descriptor_header *) &acm_header_desc,
+        (struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
+        (struct usb_descriptor_header *) &acm_descriptor,
+        (struct usb_descriptor_header *) &acm_union_desc,
+        (struct usb_descriptor_header *) &acm_hs_notify_desc,
+        (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
+        (struct usb_descriptor_header *) &acm_data_interface_desc,
+        (struct usb_descriptor_header *) &acm_ss_in_desc,
+        (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
+        (struct usb_descriptor_header *) &acm_ss_out_desc,
+        (struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
+        NULL,
+};
+
 /* string descriptors: */
 
 #define ACM_CTRL_IDX    0
@@ -643,9 +679,21 @@ acm_bind(struct usb_configuration *c, struct usb_function *f)
                 /* copy descriptors */
                 f->hs_descriptors = usb_copy_descriptors(acm_hs_function);
         }
+        if (gadget_is_superspeed(c->cdev->gadget)) {
+                acm_ss_in_desc.bEndpointAddress =
+                        acm_fs_in_desc.bEndpointAddress;
+                acm_ss_out_desc.bEndpointAddress =
+                        acm_fs_out_desc.bEndpointAddress;
+
+                /* copy descriptors, and track endpoint copies */
+                f->ss_descriptors = usb_copy_descriptors(acm_ss_function);
+                if (!f->ss_descriptors)
+                        goto fail;
+        }
 
         DBG(cdev, "acm ttyGS%d: %s speed IN/%s OUT/%s NOTIFY/%s\n",
                         acm->port_num,
+                        gadget_is_superspeed(c->cdev->gadget) ? "super" :
                         gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
                         acm->port.in->name, acm->port.out->name,
                         acm->notify->name);
@@ -675,6 +723,8 @@ acm_unbind(struct usb_configuration *c, struct usb_function *f)
 
         if (gadget_is_dualspeed(c->cdev->gadget))
                 usb_free_descriptors(f->hs_descriptors);
+        if (gadget_is_superspeed(c->cdev->gadget))
+                usb_free_descriptors(f->ss_descriptors);
         usb_free_descriptors(f->descriptors);
         gs_free_req(acm->notify, acm->notify_req);
         kfree(acm);
diff --git a/drivers/usb/gadget/f_serial.c b/drivers/usb/gadget/f_serial.c
index cf33a8d0fd5d..07197d63d9b1 100644
--- a/drivers/usb/gadget/f_serial.c
+++ b/drivers/usb/gadget/f_serial.c
@@ -99,6 +99,34 @@ static struct usb_descriptor_header *gser_hs_function[] __initdata = {
         NULL,
 };
 
+static struct usb_endpoint_descriptor gser_ss_in_desc __initdata = {
+        .bLength =              USB_DT_ENDPOINT_SIZE,
+        .bDescriptorType =      USB_DT_ENDPOINT,
+        .bmAttributes =         USB_ENDPOINT_XFER_BULK,
+        .wMaxPacketSize =       cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor gser_ss_out_desc __initdata = {
+        .bLength =              USB_DT_ENDPOINT_SIZE,
+        .bDescriptorType =      USB_DT_ENDPOINT,
+        .bmAttributes =         USB_ENDPOINT_XFER_BULK,
+        .wMaxPacketSize =       cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor gser_ss_bulk_comp_desc __initdata = {
+        .bLength =              sizeof gser_ss_bulk_comp_desc,
+        .bDescriptorType =      USB_DT_SS_ENDPOINT_COMP,
+};
+
+static struct usb_descriptor_header *gser_ss_function[] __initdata = {
+        (struct usb_descriptor_header *) &gser_interface_desc,
+        (struct usb_descriptor_header *) &gser_ss_in_desc,
+        (struct usb_descriptor_header *) &gser_ss_bulk_comp_desc,
+        (struct usb_descriptor_header *) &gser_ss_out_desc,
+        (struct usb_descriptor_header *) &gser_ss_bulk_comp_desc,
+        NULL,
+};
+
 /* string descriptors: */
 
 static struct usb_string gser_string_defs[] = {
@@ -201,9 +229,21 @@ gser_bind(struct usb_configuration *c, struct usb_function *f)
                 /* copy descriptors, and track endpoint copies */
                 f->hs_descriptors = usb_copy_descriptors(gser_hs_function);
         }
+        if (gadget_is_superspeed(c->cdev->gadget)) {
+                gser_ss_in_desc.bEndpointAddress =
+                        gser_fs_in_desc.bEndpointAddress;
+                gser_ss_out_desc.bEndpointAddress =
+                        gser_fs_out_desc.bEndpointAddress;
+
+                /* copy descriptors, and track endpoint copies */
+                f->ss_descriptors = usb_copy_descriptors(gser_ss_function);
+                if (!f->ss_descriptors)
+                        goto fail;
+        }
 
         DBG(cdev, "generic ttyGS%d: %s speed IN/%s OUT/%s\n",
                         gser->port_num,
+                        gadget_is_superspeed(c->cdev->gadget) ? "super" :
                         gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
                         gser->port.in->name, gser->port.out->name);
         return 0;
@@ -225,6 +265,8 @@ gser_unbind(struct usb_configuration *c, struct usb_function *f)
 {
         if (gadget_is_dualspeed(c->cdev->gadget))
                 usb_free_descriptors(f->hs_descriptors);
+        if (gadget_is_superspeed(c->cdev->gadget))
+                usb_free_descriptors(f->ss_descriptors);
         usb_free_descriptors(f->descriptors);
         kfree(func_to_gser(f));
 }
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index ad9e5b2df642..665c07422c26 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -242,7 +242,7 @@ static struct usb_composite_driver gserial_driver = {
         .name           = "g_serial",
         .dev            = &device_desc,
         .strings        = dev_strings,
-        .max_speed      = USB_SPEED_HIGH,
+        .max_speed      = USB_SPEED_SUPER,
 };
 
 static int __init init(void)