Changeset 9600516 in mainline for uspace/drv/uhci/uhci_struct/transfer_descriptor.h

Timestamp:

2011-01-21T16:49:47Z (14 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

643b983

Parents:

1062c8d

Message:

Added transfer queues for interrupt, control and bulk transfers.

UHCI structures refactoring

File:

• uspace/drv/uhci/uhci_struct/transfer_descriptor.h (moved) (moved from uspace/drv/uhci/transfer.h ) (3 diffs)

uspace/drv/uhci/uhci_struct/transfer_descriptor.h

@@ -32 +32 @@
  * @brief UHCI driver
  */
-#ifndef DRV_UHCI_TRANSFER_H
-#define DRV_UHCI_TRANSFER_H
+#ifndef DRV_UHCI_TRANSFER_DESCRIPTOR_H
+#define DRV_UHCI_TRANSFER_DESCRIPTOR_H
+
+#include "callback.h"
 
 /** Status field in UHCI Transfer Descriptor (TD) */
@@ -45 +47 @@
         uint8_t bitstuff:1;
         uint8_t :1; /* reserved */
-} status_t
+} status_t;
 
 /** UHCI Transfer Descriptor */
-typedef struct td {
+typedef struct transfer_descriptor {
         uint32_t fpl:28;
         char :1; /* reserved */
@@ -73 +75 @@
 
         uint32_t buffer_ptr;
-} __attribute__(("packed")) td_t;
 
+        /* there is 16 byte of data available here
+         * those are used to store callback pointer
+         * and next pointer. Thus there is some free space
+         * on 32bits systems.
+         */
+        struct transfer_descriptor *next;
+        callback_t *callback;
+} __attribute__((packed)) transfer_descriptor_t;
 
 #endif