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usb: gadget: f_ncm: add SuperSpeed descriptors for CDC NCM 

Patch enables SuperSpeed for NCM gadget.

Tested with USB3380 and measured TCP throughput with two Intel PCs:
  udc to host: 920 Mbit/s
  host to udc: 550 Mbit/s

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@haltian.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
hifive-unleashed-5.1
Jussi Kivilinna 2016-08-12 17:28:05 +03:00 committed by Felipe Balbi
parent 8dc7d30dba
commit 1650113888
1 changed files with 80 additions and 2 deletions
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82
drivers/usb/gadget/function/f_ncm.c
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@ -90,7 +90,9 @@ static inline struct f_ncm *func_to_ncm(struct usb_function *f)
/* peak (theoretical) bulk transfer rate in bits-per-second */
static inline unsigned ncm_bitrate(struct usb_gadget *g)
{
if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
return 13 * 1024 * 8 * 1000 * 8;
else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
return 13 * 512 * 8 * 1000 * 8;
else
return 19 * 64 * 1 * 1000 * 8;
@ -333,6 +335,76 @@ static struct usb_descriptor_header *ncm_hs_function[] = {
NULL,
};
/* super speed support: */
static struct usb_endpoint_descriptor ss_ncm_notify_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
.bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS)
};
static struct usb_ss_ep_comp_descriptor ss_ncm_notify_comp_desc = {
.bLength = sizeof(ss_ncm_notify_comp_desc),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
/* the following 3 values can be tweaked if necessary */
/* .bMaxBurst = 0, */
/* .bmAttributes = 0, */
.wBytesPerInterval = cpu_to_le16(NCM_STATUS_BYTECOUNT),
};
static struct usb_endpoint_descriptor ss_ncm_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(1024),
};
static struct usb_endpoint_descriptor ss_ncm_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(1024),
};
static struct usb_ss_ep_comp_descriptor ss_ncm_bulk_comp_desc = {
.bLength = sizeof(ss_ncm_bulk_comp_desc),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
/* the following 2 values can be tweaked if necessary */
/* .bMaxBurst = 0, */
/* .bmAttributes = 0, */
};
static struct usb_descriptor_header *ncm_ss_function[] = {
(struct usb_descriptor_header *) &ncm_iad_desc,
/* CDC NCM control descriptors */
(struct usb_descriptor_header *) &ncm_control_intf,
(struct usb_descriptor_header *) &ncm_header_desc,
(struct usb_descriptor_header *) &ncm_union_desc,
(struct usb_descriptor_header *) &ecm_desc,
(struct usb_descriptor_header *) &ncm_desc,
(struct usb_descriptor_header *) &ss_ncm_notify_desc,
(struct usb_descriptor_header *) &ss_ncm_notify_comp_desc,
/* data interface, altsettings 0 and 1 */
(struct usb_descriptor_header *) &ncm_data_nop_intf,
(struct usb_descriptor_header *) &ncm_data_intf,
(struct usb_descriptor_header *) &ss_ncm_in_desc,
(struct usb_descriptor_header *) &ss_ncm_bulk_comp_desc,
(struct usb_descriptor_header *) &ss_ncm_out_desc,
(struct usb_descriptor_header *) &ss_ncm_bulk_comp_desc,
NULL,
};
/* string descriptors: */
#define STRING_CTRL_IDX 0
@ -1431,8 +1503,13 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
hs_ncm_notify_desc.bEndpointAddress =
fs_ncm_notify_desc.bEndpointAddress;
ss_ncm_in_desc.bEndpointAddress = fs_ncm_in_desc.bEndpointAddress;
ss_ncm_out_desc.bEndpointAddress = fs_ncm_out_desc.bEndpointAddress;
ss_ncm_notify_desc.bEndpointAddress =
fs_ncm_notify_desc.bEndpointAddress;
status = usb_assign_descriptors(f, ncm_fs_function, ncm_hs_function,
NULL, NULL);
ncm_ss_function, NULL);
if (status)
goto fail;
@ -1450,6 +1527,7 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
ncm->task_timer.function = ncm_tx_timeout;
DBG(cdev, "CDC Network: %s speed IN/%s OUT/%s NOTIFY/%s\n",
gadget_is_superspeed(c->cdev->gadget) ? "super" :
gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
ncm->port.in_ep->name, ncm->port.out_ep->name,
ncm->notify->name);