patch-2.4.0-test3 linux/drivers/usb/storage/transport.h

• Lines: 133
• Date: Wed Jun 28 19:46:22 2000
• Orig file: v2.4.0-test2/linux/drivers/usb/storage/transport.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/drivers/usb/storage/transport.h linux/drivers/usb/storage/transport.h
@@ -0,0 +1,132 @@
+/* Driver for USB Mass Storage compliant devices
+ * Transport Functions Header File
+ *
+ * $Id: transport.h,v 1.1 2000/06/27 01:25:28 mdharm Exp $
+ *
+ * Current development and maintainance by:
+ *   (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
+ *
+ * This driver is based on the 'USB Mass Storage Class' document. This
+ * describes in detail the protocol used to communicate with such
+ * devices.  Clearly, the designers had SCSI and ATAPI commands in
+ * mind when they created this document.  The commands are all very
+ * similar to commands in the SCSI-II and ATAPI specifications.
+ *
+ * It is important to note that in a number of cases this class
+ * exhibits class-specific exemptions from the USB specification.
+ * Notably the usage of NAK, STALL and ACK differs from the norm, in
+ * that they are used to communicate wait, failed and OK on commands.
+ *
+ * Also, for certain devices, the interrupt endpoint is used to convey
+ * status of a command.
+ *
+ * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
+ * information about this driver.
+ *
+ * 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, 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.
+ */
+
+#ifndef _TRANSPORT_H_
+#define _TRANSPORT_H_
+
+#include <linux/blk.h>
+#include "usb.h"
+#include "scsi.h"
+
+/* bit set if input */
+extern unsigned char us_direction[256/8];
+#define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
+
+/* Protocols */
+
+#define US_PR_CBI	0x00		/* Control/Bulk/Interrupt */
+#define US_PR_CB	0x01		/* Control/Bulk w/o interrupt */
+#define US_PR_BULK	0x50		/* bulk only */
+
+/*
+ * Bulk only data structures
+ */
+
+/* command block wrapper */
+struct bulk_cb_wrap {
+	__u32	Signature;		/* contains 'USBC' */
+	__u32	Tag;			/* unique per command id */
+	__u32	DataTransferLength;	/* size of data */
+	__u8	Flags;			/* direction in bit 0 */
+	__u8	Lun;			/* LUN normally 0 */
+	__u8	Length;			/* of of the CDB */
+	__u8	CDB[16];		/* max command */
+};
+
+#define US_BULK_CB_WRAP_LEN	31
+#define US_BULK_CB_SIGN		0x43425355	/*spells out USBC */
+#define US_BULK_FLAG_IN		1
+#define US_BULK_FLAG_OUT	0
+
+/* command status wrapper */
+struct bulk_cs_wrap {
+	__u32	Signature;		/* should = 'USBS' */
+	__u32	Tag;			/* same as original command */
+	__u32	Residue;		/* amount not transferred */
+	__u8	Status;			/* see below */
+	__u8	Filler[18];
+};
+
+#define US_BULK_CS_WRAP_LEN	13
+#define US_BULK_CS_SIGN		0x53425355	/* spells out 'USBS' */
+#define US_BULK_STAT_OK		0
+#define US_BULK_STAT_FAIL	1
+#define US_BULK_STAT_PHASE	2
+
+/* bulk-only class specific requests */
+#define US_BULK_RESET_REQUEST	0xff
+#define US_BULK_GET_MAX_LUN	0xfe
+
+/*
+ * us_bulk_transfer() return codes
+ */
+#define US_BULK_TRANSFER_GOOD		0  /* good transfer                 */
+#define US_BULK_TRANSFER_SHORT		1  /* transfered less than expected */
+#define US_BULK_TRANSFER_FAILED		2  /* transfer died in the middle   */
+#define US_BULK_TRANSFER_ABORTED	3  /* transfer canceled             */
+
+/*
+ * Transport return codes
+ */
+
+#define USB_STOR_TRANSPORT_GOOD	   0   /* Transport good, command good	   */
+#define USB_STOR_TRANSPORT_FAILED  1   /* Transport good, command failed   */
+#define USB_STOR_TRANSPORT_ERROR   2   /* Transport bad (i.e. device dead) */
+#define USB_STOR_TRANSPORT_ABORTED 3   /* Transport aborted                */
+
+/*
+ * CBI accept device specific command
+ */
+
+#define US_CBI_ADSC		0
+
+extern void usb_stor_CBI_irq(struct urb*);
+extern int usb_stor_CBI_transport(Scsi_Cmnd*, struct us_data*);
+
+extern int usb_stor_CB_transport(Scsi_Cmnd*, struct us_data*);
+extern int usb_stor_CB_reset(struct us_data*);
+
+extern int usb_stor_Bulk_transport(Scsi_Cmnd*, struct us_data*);
+extern int usb_stor_Bulk_max_lun(struct us_data*);
+extern int usb_stor_Bulk_reset(struct us_data*);
+
+void usb_stor_invoke_transport(Scsi_Cmnd *, struct us_data *);
+
+#endif