patch-2.4.21 linux-2.4.21/drivers/usb/auerbuf.h

• Lines: 70
• Date: 2003-06-13 07:51:36.000000000 -0700
• Orig file: linux-2.4.20/drivers/usb/auerbuf.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/usb/auerbuf.h linux-2.4.21/drivers/usb/auerbuf.h
@@ -0,0 +1,69 @@
+/*****************************************************************************/
+/*
+ *      auerbuf.h  --  Auerswald PBX/System Telephone urb list storage.
+ *
+ *      Copyright (C) 2002  Wolfgang Mües (wolfgang@iksw-muees.de)
+ *
+ *      This program is free software; you can redistribute it and/or modify
+ *      it under the terms of the GNU General Public License as published by
+ *      the Free Software Foundation; either version 2 of the License, or
+ *      (at your option) any later version.
+ *
+ *      This program is distributed in the hope that it will be useful,
+ *      but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *      GNU General Public License for more details.
+ *
+ *      You should have received a copy of the GNU General Public License
+ *      along with this program; if not, write to the Free Software
+ *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+ /*****************************************************************************/
+
+/* This module assembles together an URB, an usb_ctrlrequest struct for sending of
+ * control messages, and a data buffer.
+ * These items (auerbuf) are collected in a list (auerbufctl) and are used
+ * for serialized usb data transfer.
+ */
+
+#ifndef AUERBUF_H
+#define AUERBUF_H
+
+#include <linux/usb.h>
+
+/* buffer element */
+struct auerbufctl;			/* forward */
+struct auerbuf {
+	unsigned char *bufp;		/* reference to allocated data buffer */
+	unsigned int len;		/* number of characters in data buffer */
+	unsigned int retries;		/* for urb retries */
+	struct usb_ctrlrequest *dr;	/* for setup data in control messages */
+	struct urb *urbp;		/* USB urb */
+	struct auerbufctl *list;	/* pointer to list */
+	struct list_head buff_list;	/* reference to next buffer in list */
+};
+
+/* buffer list control block */
+struct auerbufctl {
+	spinlock_t lock;		/* protection in interrupt */
+	struct list_head free_buff_list;/* free buffers */
+	struct list_head rec_buff_list;	/* buffers with received data */
+};
+
+/* Function prototypes */
+void auerbuf_free(struct auerbuf *bp);
+
+void auerbuf_free_list(struct list_head *q);
+
+void auerbuf_init(struct auerbufctl *bcp);
+
+void auerbuf_free_buffers(struct auerbufctl *bcp);
+
+int auerbuf_setup(struct auerbufctl *bcp, unsigned int numElements,
+		  unsigned int bufsize);
+
+struct auerbuf *auerbuf_getbuf(struct auerbufctl *bcp);
+
+void auerbuf_releasebuf(struct auerbuf *bp);
+
+#endif	/* AUERBUF_H */