Changeset 75d8821 in mainline

Timestamp:

2013-12-31T06:58:19Z (11 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

1760556

Parents:

643e7ba

Message:

libusbhost: Add dummy USB 2.0 calculations.

Location:

uspace/lib/usbhost

Files:

• include/usb/host/usb_bus.h (modified) (2 diffs)
• src/usb_bus.c (modified) (1 diff)

uspace/lib/usbhost/include/usb/host/usb_bus.h

@@ -53 +53 @@
 #define BANDWIDTH_AVAILABLE_USB11 ((BANDWIDTH_TOTAL_USB11 / 10) * 9)
 
+//TODO: Implement
+#define BANDWIDTH_AVAILABLE_USB20  1
+
 typedef size_t (*bw_count_func_t)(usb_speed_t, usb_transfer_type_t, size_t, size_t);
 typedef void (*ep_remove_callback_t)(endpoint_t *, void *);
@@ -78 +81 @@
 
 size_t bandwidth_count_usb11(usb_speed_t speed, usb_transfer_type_t type,
+    size_t size, size_t max_packet_size);
+size_t bandwidth_count_usb20(usb_speed_t speed, usb_transfer_type_t type,
     size_t size, size_t max_packet_size);
 

uspace/lib/usbhost/src/usb_bus.c

@@ -169 +169 @@
 }
 
+/** Calculate bandwidth that needs to be reserved for communication with EP.
+ * Calculation follows USB 2.0 specification.
+ * @param speed Device's speed.
+ * @param type Type of the transfer.
+ * @param size Number of byte to transfer.
+ * @param max_packet_size Maximum bytes in one packet.
+ */
+size_t bandwidth_count_usb20(usb_speed_t speed, usb_transfer_type_t type,
+    size_t size, size_t max_packet_size)
+{
+        /* We care about bandwidth only for interrupt and isochronous. */
+        if ((type != USB_TRANSFER_INTERRUPT)
+            && (type != USB_TRANSFER_ISOCHRONOUS)) {
+                return 0;
+        }
+        //TODO Implement
+        return 0;
+}
+
 /** Initialize to default state.
  * You need to provide valid bw_count function if you plan to use