Changeset 6b433a8 in mainline for uspace/drv/bus/usb/xhci/bus.c

Timestamp:

2017-11-20T19:14:31Z (7 years ago)

Author:

Salmelu <salmelu@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

27b0ea0

Parents:

d3086873

Message:

Isochronous transfers - endpoint initialization

File:

• uspace/drv/bus/usb/xhci/bus.c (modified) (1 diff)

uspace/drv/bus/usb/xhci/bus.c

@@ -68 +68 @@
         ep->max_streams = desc->usb3.max_streams;
         ep->max_burst = desc->usb3.max_burst;
-        // TODO add this property to usb_endpoint_desc_t and fetch it from ss companion desc
-        ep->mult = 0;
+        ep->mult = desc->usb3.mult;
+
+        if (ep->base.transfer_type == USB_TRANSFER_ISOCHRONOUS) {
+                if (ep->base.device->speed <= USB_SPEED_HIGH) {
+                        ep->isoch_max_size = desc->max_packet_size * (desc->packets + 1);
+                }
+                else if (ep->base.device->speed == USB_SPEED_SUPER) {
+                        ep->isoch_max_size = desc->usb3.bytes_per_interval;
+                }
+                /* Technically there could be superspeed plus too. */
+
+                /* Allocate and setup isochronous-specific structures. */
+                ep->isoch_enqueue = 0;
+                ep->isoch_dequeue = XHCI_ISOCH_BUFFER_COUNT - 1;
+                ep->isoch_started = false;
+        }
 
         return xhci_endpoint_alloc_transfer_ds(ep);