patch-2.1.66 linux/drivers/char/ftape/lowlevel/ftape-rw.h

• Lines: 122
• Date: Tue Nov 25 14:45:27 1997
• Orig file: v2.1.65/linux/drivers/char/ftape/lowlevel/ftape-rw.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.65/linux/drivers/char/ftape/lowlevel/ftape-rw.h linux/drivers/char/ftape/lowlevel/ftape-rw.h
@@ -0,0 +1,121 @@
+#ifndef _FTAPE_RW_H
+#define _FTAPE_RW_H
+
+/*
+ * Copyright (C) 1993-1996 Bas Laarhoven,
+ *           (C) 1996-1997 Claus-Justus Heine.
+
+ 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; see the file COPYING.  If not, write to
+ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ *
+ * $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/ftape-rw.h,v $
+ * $Revision: 1.2 $
+ * $Date: 1997/10/05 19:18:25 $
+ *
+ *      This file contains the definitions for the read and write
+ *      functions for the QIC-117 floppy-tape driver for Linux.
+ *
+ * Claus-Justus Heine (1996/09/20): Add definition of format code 6
+ * Claus-Justus Heine (1996/10/04): Changed GET/PUT macros to cast to (__u8 *)
+ *
+ */
+
+#include "../lowlevel/fdc-io.h"
+#include "../lowlevel/ftape-init.h"
+#include "../lowlevel/ftape-bsm.h"
+
+#if LINUX_VERSION_CODE >= KERNEL_VER(2,0,0)
+#include <asm/unaligned.h>
+
+#define GET2(address, offset) get_unaligned((__u16*)((__u8 *)address + offset))
+#define GET4(address, offset) get_unaligned((__u32*)((__u8 *)address + offset))
+#define GET8(address, offset) get_unaligned((__u64*)((__u8 *)address + offset))
+#define PUT2(address, offset , value) put_unaligned((value), (__u16*)((__u8 *)address + offset))
+#define PUT4(address, offset , value) put_unaligned((value), (__u32*)((__u8 *)address + offset))
+#define PUT8(address, offset , value) put_unaligned((value), (__u64*)((__u8 *)address + offset))
+#else
+#define GET2(address, offset) *(__u16*)((__u8 *)address + offset)
+#define GET4(address, offset) *(__u32*)((__u8 *)address + offset)
+#define GET8(address, offset) *(__u64*)((__u8 *)address + offset)
+#define PUT2(address, offset , value) *(__u16*)((__u8 *)address + offset) = (__u16)(value)
+#define PUT4(address, offset , value) *(__u32*)((__u8 *)address + offset) = (__u32)(value)
+#define PUT8(address, offset , value) *(__u64*)((__u8 *)address + offset) = (__u32)(value)
+#endif
+
+enum runner_status_enum {
+	idle = 0,
+	running,
+	do_abort,
+	aborting,
+	logical_eot,
+	end_of_tape,
+};
+
+typedef enum ft_buffer_queue {
+	ft_queue_head = 0,
+	ft_queue_tail = 1
+} ft_buffer_queue_t;
+
+
+typedef struct {
+	int track;		/* tape head position */
+	volatile int segment;	/* current segment */
+	volatile int sector;	/* sector offset within current segment */
+	volatile unsigned int bot;	/* logical begin of track */
+	volatile unsigned int eot;	/* logical end of track */
+	volatile unsigned int known;	/* validates bot, segment, sector */
+} location_record;
+
+/*      Count nr of 1's in pattern.
+ */
+extern inline int count_ones(unsigned long mask)
+{
+	int bits;
+
+	for (bits = 0; mask != 0; mask >>= 1) {
+		if (mask & 1) {
+			++bits;
+		}
+	}
+	return bits;
+}
+
+#define FT_MAX_NR_BUFFERS 16 /* arbitrary value */
+/*      ftape-rw.c defined global vars.
+ */
+extern buffer_struct *ft_buffer[FT_MAX_NR_BUFFERS];
+extern int ft_nr_buffers;
+extern location_record ft_location;
+extern volatile int ftape_tape_running;
+
+/*      ftape-rw.c defined global functions.
+ */
+extern int  ftape_setup_new_segment(buffer_struct * buff,
+				    int segment_id,
+				    int offset);
+extern int  ftape_calc_next_cluster(buffer_struct * buff);
+extern buffer_struct *ftape_next_buffer (ft_buffer_queue_t pos);
+extern buffer_struct *ftape_get_buffer  (ft_buffer_queue_t pos);
+extern int            ftape_buffer_id   (ft_buffer_queue_t pos);
+extern void           ftape_reset_buffer(void);
+extern int  ftape_read_id(void);
+extern void ftape_tape_parameters(__u8 drive_configuration);
+extern int  ftape_wait_segment(buffer_state_enum state);
+extern int  ftape_dumb_stop(void);
+extern int  ftape_start_tape(int segment_id, int offset);
+extern int  ftape_stop_tape(int *pstatus);
+extern int  ftape_handle_logical_eot(void);
+extern buffer_state_enum ftape_set_state(buffer_state_enum new_state);
+#endif				/* _FTAPE_RW_H */