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

• Lines: 80
• Date: 2003-06-13 07:51:36.000000000 -0700
• Orig file: linux-2.4.20/drivers/usb/auerchain.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/usb/auerchain.h linux-2.4.21/drivers/usb/auerchain.h
@@ -0,0 +1,79 @@
+/*****************************************************************************/
+/*
+ *      auerchain.h  --  Auerswald PBX/System Telephone chained urb support.
+ *
+ *      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 is used to make a FIFO of URBs, to serialize the submit.
+ * This may be used to serialize control messages, which is not supported
+ * by the Linux USB subsystem.
+ */
+
+#ifndef AUERCHAIN_H
+#define AUERCHAIN_H
+
+#include <linux/usb.h>
+
+/* urb chain element */
+struct auerchain;			/* forward for circular reference */
+struct auerchainelement {
+	struct auerchain *chain;	/* pointer to the chain to which this element belongs */
+	struct urb *urbp;		/* pointer to attached urb */
+	void *context;			/* saved URB context */
+	usb_complete_t complete;	/* saved URB completion function */
+	struct list_head list;		/* to include element into a list */
+};
+
+/* urb chain */
+struct auerchain {
+	struct auerchainelement *active;/* element which is submitted to urb */
+	spinlock_t lock;		/* protection agains interrupts */
+	struct list_head waiting_list;	/* list of waiting elements */
+	struct list_head free_list;	/* list of available elements */
+};
+
+/* urb blocking completion helper struct */
+struct auerchain_chs {
+	wait_queue_head_t wqh;		/* wait for completion */
+	unsigned int done;		/* completion flag */
+};
+
+
+/* Function prototypes */
+int auerchain_submit_urb_list(struct auerchain *acp, struct urb *urb,
+			      int early);
+
+int auerchain_submit_urb(struct auerchain *acp, struct urb *urb);
+
+int auerchain_unlink_urb(struct auerchain *acp, struct urb *urb);
+
+void auerchain_unlink_all(struct auerchain *acp);
+
+void auerchain_free(struct auerchain *acp);
+
+void auerchain_init(struct auerchain *acp);
+
+int auerchain_setup(struct auerchain *acp, unsigned int numElements);
+
+int auerchain_control_msg(struct auerchain *acp, struct usb_device *dev,
+			  unsigned int pipe, __u8 request,
+			  __u8 requesttype, __u16 value, __u16 index,
+			  void *data, __u16 size, int timeout);
+
+#endif	/* AUERCHAIN_H */