Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 897 insertions, 0 deletions

diff --git a/drivers/char/ftape/lowlevel/ftape-ctl.c b/drivers/char/ftape/lowlevel/ftape-ctl.c
new file mode 100644
index 000000000000..32e043911790
--- /dev/null
+++ b/drivers/char/ftape/lowlevel/ftape-ctl.c
@@ -0,0 +1,897 @@
+/*
+ *      Copyright (C) 1993-1996 Bas Laarhoven,
+ *                    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-ctl.c,v $
+ * $Revision: 1.4 $
+ * $Date: 1997/11/11 14:37:44 $
+ *
+ *      This file contains the non-read/write ftape functions for the
+ *      QIC-40/80/3010/3020 floppy-tape driver "ftape" for Linux.
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+
+#include <linux/ftape.h>
+#include <linux/qic117.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+/* ease porting between pre-2.4.x and later kernels */
+#define vma_get_pgoff(v)      ((v)->vm_pgoff)
+
+#include "../lowlevel/ftape-tracing.h"
+#include "../lowlevel/ftape-io.h"
+#include "../lowlevel/ftape-ctl.h"
+#include "../lowlevel/ftape-write.h"
+#include "../lowlevel/ftape-read.h"
+#include "../lowlevel/ftape-rw.h"
+#include "../lowlevel/ftape-bsm.h"
+
+/*      Global vars.
+ */
+ftape_info ftape_status = {
+/*  vendor information */
+	{ 0, },     /* drive type */
+/*  data rates */
+	500,        /* used data rate */
+	500,        /* drive max rate */
+	500,        /* fdc max rate   */
+/*  drive selection, either FTAPE_SEL_A/B/C/D */
+	-1,     /* drive selection */
+/*  flags set after decode the drive and tape status   */
+	0,          /* formatted */
+	1,          /* no tape */
+	1,          /* write protected */
+	1,          /* new tape */
+/*  values of last queried drive/tape status and error */
+	{{0,}},     /* last error code */
+	{{0,}},     /* drive status, configuration, tape status */
+/*  cartridge geometry */
+        20,         /* tracks_per_tape */
+        102,        /* segments_per_track */
+/*  location of header segments, etc. */
+	-1,     /* used_header_segment */
+	-1,     /* header_segment_1 */
+	-1,     /* header_segment_2 */
+	-1,     /* first_data_segment */
+        -1,     /* last_data_segment */
+/*  the format code as stored in the header segment  */
+	fmt_normal, /* format code */
+/*  the default for the qic std: unknown */
+	-1,
+/*  is tape running? */
+	idle,       /* runner_state */
+/*  is tape reading/writing/verifying/formatting/deleting */
+	idle,       /* driver state */
+/*  flags fatal hardware error */
+	1,          /* failure */
+/*  history record */
+	{ 0, }      /* history record */
+};
+	
+int ftape_segments_per_head     = 1020;
+int ftape_segments_per_cylinder = 4;
+int ftape_init_drive_needed = 1; /* need to be global for ftape_reset_drive()
+				  * in ftape-io.c
+				  */
+
+/*      Local vars.
+ */
+static const vendor_struct vendors[] = QIC117_VENDORS;
+static const wakeup_method methods[] = WAKEUP_METHODS;
+
+const ftape_info *ftape_get_status(void)
+{
+#if defined(STATUS_PARANOYA)
+	static ftape_info get_status;
+
+	get_status = ftape_status;
+	return &get_status;
+#else
+	return &ftape_status; /*  maybe return only a copy of it to assure 
+			       *  read only access
+			       */
+#endif
+}
+
+static int ftape_not_operational(int status)
+{
+	/* return true if status indicates tape can not be used.
+	 */
+	return ((status ^ QIC_STATUS_CARTRIDGE_PRESENT) &
+		(QIC_STATUS_ERROR |
+		 QIC_STATUS_CARTRIDGE_PRESENT |
+		 QIC_STATUS_NEW_CARTRIDGE));
+}
+
+int ftape_seek_to_eot(void)
+{
+	int status;
+	TRACE_FUN(ft_t_any);
+
+	TRACE_CATCH(ftape_ready_wait(ftape_timeout.pause, &status),);
+	while ((status & QIC_STATUS_AT_EOT) == 0) {
+		if (ftape_not_operational(status)) {
+			TRACE_EXIT -EIO;
+		}
+		TRACE_CATCH(ftape_command_wait(QIC_PHYSICAL_FORWARD,
+					       ftape_timeout.rewind,&status),);
+	}
+	TRACE_EXIT 0;
+}
+
+int ftape_seek_to_bot(void)
+{
+	int status;
+	TRACE_FUN(ft_t_any);
+
+	TRACE_CATCH(ftape_ready_wait(ftape_timeout.pause, &status),);
+	while ((status & QIC_STATUS_AT_BOT) == 0) {
+		if (ftape_not_operational(status)) {
+			TRACE_EXIT -EIO;
+		}
+		TRACE_CATCH(ftape_command_wait(QIC_PHYSICAL_REVERSE,
+					       ftape_timeout.rewind,&status),);
+	}
+	TRACE_EXIT 0;
+}
+
+static int ftape_new_cartridge(void)
+{
+	ft_location.track = -1; /* force seek on first access */
+	ftape_zap_read_buffers();
+	ftape_zap_write_buffers();
+	return 0;
+}
+
+int ftape_abort_operation(void)
+{
+	int result = 0;
+	int status;
+	TRACE_FUN(ft_t_flow);
+
+	if (ft_runner_status == running) {
+		TRACE(ft_t_noise, "aborting runner, waiting");
+		
+		ft_runner_status = do_abort;
+		/* set timeout so that the tape will run to logical EOT
+		 * if we missed the last sector and there are no queue pulses.
+		 */
+		result = ftape_dumb_stop();
+	}
+	if (ft_runner_status != idle) {
+		if (ft_runner_status == do_abort) {
+			TRACE(ft_t_noise, "forcing runner abort");
+		}
+		TRACE(ft_t_noise, "stopping tape");
+		result = ftape_stop_tape(&status);
+		ft_location.known = 0;
+		ft_runner_status  = idle;
+	}
+	ftape_reset_buffer();
+	ftape_zap_read_buffers();
+	ftape_set_state(idle);
+	TRACE_EXIT result;
+}
+
+static int lookup_vendor_id(unsigned int vendor_id)
+{
+	int i = 0;
+
+	while (vendors[i].vendor_id != vendor_id) {
+		if (++i >= NR_ITEMS(vendors)) {
+			return -1;
+		}
+	}
+	return i;
+}
+
+static void ftape_detach_drive(void)
+{
+	TRACE_FUN(ft_t_any);
+
+	TRACE(ft_t_flow, "disabling tape drive and fdc");
+	ftape_put_drive_to_sleep(ft_drive_type.wake_up);
+	fdc_catch_stray_interrupts(1);	/* one always comes */
+	fdc_disable();
+	fdc_release_irq_and_dma();
+	fdc_release_regions();
+	TRACE_EXIT;
+}
+
+static void clear_history(void)
+{
+	ft_history.used = 0;
+	ft_history.id_am_errors =
+		ft_history.id_crc_errors =
+		ft_history.data_am_errors =
+		ft_history.data_crc_errors =
+		ft_history.overrun_errors =
+		ft_history.no_data_errors =
+		ft_history.retries =
+		ft_history.crc_errors =
+		ft_history.crc_failures =
+		ft_history.ecc_failures =
+		ft_history.corrected =
+		ft_history.defects =
+		ft_history.rewinds = 0;
+}
+
+static int ftape_activate_drive(vendor_struct * drive_type)
+{
+	int result = 0;
+	TRACE_FUN(ft_t_flow);
+
+	/* If we already know the drive type, wake it up.
+	 * Else try to find out what kind of drive is attached.
+	 */
+	if (drive_type->wake_up != unknown_wake_up) {
+		TRACE(ft_t_flow, "enabling tape drive and fdc");
+		result = ftape_wakeup_drive(drive_type->wake_up);
+		if (result < 0) {
+			TRACE(ft_t_err, "known wakeup method failed");
+		}
+	} else {
+		wake_up_types method;
+		const ft_trace_t old_tracing = TRACE_LEVEL;
+		if (TRACE_LEVEL < ft_t_flow) {
+			SET_TRACE_LEVEL(ft_t_bug);
+		}
+
+		/*  Try to awaken the drive using all known methods.
+		 *  Lower tracing for a while.
+		 */
+		for (method=no_wake_up; method < NR_ITEMS(methods); ++method) {
+			drive_type->wake_up = method;
+#ifdef CONFIG_FT_TWO_DRIVES
+			/*  Test setup for dual drive configuration.
+			 *  /dev/rft2 uses mountain wakeup
+			 *  /dev/rft3 uses colorado wakeup
+			 *  Other systems will use the normal scheme.
+			 */
+			if ((ft_drive_sel < 2)                            ||
+			    (ft_drive_sel == 2 && method == FT_WAKE_UP_1) ||
+			    (ft_drive_sel == 3 && method == FT_WAKE_UP_2)) {
+				result=ftape_wakeup_drive(drive_type->wake_up);
+			} else {
+				result = -EIO;
+			}
+#else
+			result = ftape_wakeup_drive(drive_type->wake_up);
+#endif
+			if (result >= 0) {
+				TRACE(ft_t_warn, "drive wakeup method: %s",
+				      methods[drive_type->wake_up].name);
+				break;
+			}
+		}
+		SET_TRACE_LEVEL(old_tracing);
+
+		if (method >= NR_ITEMS(methods)) {
+			/* no response at all, cannot open this drive */
+			drive_type->wake_up = unknown_wake_up;
+			TRACE(ft_t_err, "no tape drive found !");
+			result = -ENODEV;
+		}
+	}
+	TRACE_EXIT result;
+}
+
+static int ftape_get_drive_status(void)
+{
+	int result;
+	int status;
+	TRACE_FUN(ft_t_flow);
+
+	ft_no_tape = ft_write_protected = 0;
+	/*    Tape drive is activated now.
+	 *    First clear error status if present.
+	 */
+	do {
+		result = ftape_ready_wait(ftape_timeout.reset, &status);
+		if (result < 0) {
+			if (result == -ETIME) {
+				TRACE(ft_t_err, "ftape_ready_wait timeout");
+			} else if (result == -EINTR) {
+				TRACE(ft_t_err, "ftape_ready_wait aborted");
+			} else {
+				TRACE(ft_t_err, "ftape_ready_wait failed");
+			}
+			TRACE_EXIT -EIO;
+		}
+		/*  Clear error condition (drive is ready !)
+		 */
+		if (status & QIC_STATUS_ERROR) {
+			unsigned int error;
+			qic117_cmd_t command;
+
+			TRACE(ft_t_err, "error status set");
+			result = ftape_report_error(&error, &command, 1);
+			if (result < 0) {
+				TRACE(ft_t_err,
+				      "report_error_code failed: %d", result);
+				/* hope it's working next time */
+				ftape_reset_drive();
+				TRACE_EXIT -EIO;
+			} else if (error != 0) {
+				TRACE(ft_t_noise, "error code   : %d", error);
+				TRACE(ft_t_noise, "error command: %d", command);
+			}
+		}
+		if (status & QIC_STATUS_NEW_CARTRIDGE) {
+			unsigned int error;
+			qic117_cmd_t command;
+			const ft_trace_t old_tracing = TRACE_LEVEL;
+			SET_TRACE_LEVEL(ft_t_bug);
+
+			/*  Undocumented feature: Must clear (not present!)
+			 *  error here or we'll fail later.
+			 */
+			ftape_report_error(&error, &command, 1);
+
+			SET_TRACE_LEVEL(old_tracing);
+			TRACE(ft_t_info, "status: new cartridge");
+			ft_new_tape = 1;
+		} else {
+			ft_new_tape = 0;
+		}
+		FT_SIGNAL_EXIT(_DONT_BLOCK);
+	} while (status & QIC_STATUS_ERROR);
+	
+	ft_no_tape = !(status & QIC_STATUS_CARTRIDGE_PRESENT);
+	ft_write_protected = (status & QIC_STATUS_WRITE_PROTECT) != 0;
+	if (ft_no_tape) {
+		TRACE(ft_t_warn, "no cartridge present");
+	} else {
+		if (ft_write_protected) {
+			TRACE(ft_t_noise, "Write protected cartridge");
+		}
+	}
+	TRACE_EXIT 0;
+}
+
+static void ftape_log_vendor_id(void)
+{
+	int vendor_index;
+	TRACE_FUN(ft_t_flow);
+
+	ftape_report_vendor_id(&ft_drive_type.vendor_id);
+	vendor_index = lookup_vendor_id(ft_drive_type.vendor_id);
+	if (ft_drive_type.vendor_id == UNKNOWN_VENDOR &&
+	    ft_drive_type.wake_up == wake_up_colorado) {
+		vendor_index = 0;
+		/* hack to get rid of all this mail */
+		ft_drive_type.vendor_id = 0;
+	}
+	if (vendor_index < 0) {
+		/* Unknown vendor id, first time opening device.  The
+		 * drive_type remains set to type found at wakeup
+		 * time, this will probably keep the driver operating
+		 * for this new vendor.  
+		 */
+		TRACE(ft_t_warn, "\n"
+		      KERN_INFO "============ unknown vendor id ===========\n"
+		      KERN_INFO "A new, yet unsupported tape drive is found\n"
+		      KERN_INFO "Please report the following values:\n"
+		      KERN_INFO "   Vendor id     : 0x%04x\n"
+		      KERN_INFO "   Wakeup method : %s\n"
+		      KERN_INFO "And a description of your tape drive\n"
+		      KERN_INFO "to "THE_FTAPE_MAINTAINER"\n"
+		      KERN_INFO "==========================================",
+		      ft_drive_type.vendor_id,
+		      methods[ft_drive_type.wake_up].name);
+		ft_drive_type.speed = 0;		/* unknown */
+	} else {
+		ft_drive_type.name  = vendors[vendor_index].name;
+		ft_drive_type.speed = vendors[vendor_index].speed;
+		TRACE(ft_t_info, "tape drive type: %s", ft_drive_type.name);
+		/* scan all methods for this vendor_id in table */
+		while(ft_drive_type.wake_up != vendors[vendor_index].wake_up) {
+			if (vendor_index < NR_ITEMS(vendors) - 1 &&
+			    vendors[vendor_index + 1].vendor_id 
+			    == 
+			    ft_drive_type.vendor_id) {
+				++vendor_index;
+			} else {
+				break;
+			}
+		}
+		if (ft_drive_type.wake_up != vendors[vendor_index].wake_up) {
+			TRACE(ft_t_warn, "\n"
+		     KERN_INFO "==========================================\n"
+		     KERN_INFO "wakeup type mismatch:\n"
+		     KERN_INFO "found: %s, expected: %s\n"
+		     KERN_INFO "please report this to "THE_FTAPE_MAINTAINER"\n"
+		     KERN_INFO "==========================================",
+			      methods[ft_drive_type.wake_up].name,
+			      methods[vendors[vendor_index].wake_up].name);
+		}
+	}
+	TRACE_EXIT;
+}
+
+void ftape_calc_timeouts(unsigned int qic_std,
+			 unsigned int data_rate,
+			 unsigned int tape_len)
+{
+	int speed;		/* deci-ips ! */
+	int ff_speed;
+	int length;
+	TRACE_FUN(ft_t_any);
+
+	/*                           tape transport speed
+	 *  data rate:        QIC-40   QIC-80   QIC-3010 QIC-3020
+	 *
+	 *    250 Kbps        25 ips     n/a      n/a      n/a
+	 *    500 Kbps        50 ips   34 ips   22.6 ips   n/a
+	 *      1 Mbps          n/a    68 ips   45.2 ips 22.6 ips
+	 *      2 Mbps          n/a      n/a      n/a    45.2 ips
+	 *
+	 *  fast tape transport speed is at least 68 ips.
+	 */
+	switch (qic_std) {
+	case QIC_TAPE_QIC40:
+		speed = (data_rate == 250) ? 250 : 500;
+		break;
+	case QIC_TAPE_QIC80:
+		speed = (data_rate == 500) ? 340 : 680;
+		break;
+	case QIC_TAPE_QIC3010:
+		speed = (data_rate == 500) ? 226 : 452;
+		break;
+	case QIC_TAPE_QIC3020:
+		speed = (data_rate == 1000) ? 226 : 452;
+		break;
+	default:
+		TRACE(ft_t_bug, "Unknown qic_std (bug) ?");
+		speed = 500;
+		break;
+	}
+	if (ft_drive_type.speed == 0) {
+		unsigned long t0;
+		static int dt = 0;     /* keep gcc from complaining */
+		static int first_time = 1;
+
+		/*  Measure the time it takes to wind to EOT and back to BOT.
+		 *  If the tape length is known, calculate the rewind speed.
+		 *  Else keep the time value for calculation of the rewind
+		 *  speed later on, when the length _is_ known.
+		 *  Ask for a report only when length and speed are both known.
+		 */
+		if (first_time) {
+			ftape_seek_to_bot();
+			t0 = jiffies;
+			ftape_seek_to_eot();
+			ftape_seek_to_bot();
+			dt = (int) (((jiffies - t0) * FT_USPT) / 1000);
+			if (dt < 1) {
+				dt = 1;	/* prevent div by zero on failures */
+			}
+			first_time = 0;
+			TRACE(ft_t_info,
+			      "trying to determine seek timeout, got %d msec",
+			      dt);
+		}
+		if (tape_len != 0) {
+			ft_drive_type.speed = 
+				(2 * 12 * tape_len * 1000) / dt;
+			TRACE(ft_t_warn, "\n"
+		     KERN_INFO "==========================================\n"
+		     KERN_INFO "drive type: %s\n"
+		     KERN_INFO "delta time = %d ms, length = %d ft\n"
+		     KERN_INFO "has a maximum tape speed of %d ips\n"
+		     KERN_INFO "please report this to "THE_FTAPE_MAINTAINER"\n"
+		     KERN_INFO "==========================================",
+			      ft_drive_type.name, dt, tape_len, 
+			      ft_drive_type.speed);
+		}
+	}
+	/*  Handle unknown length tapes as very long ones. We'll
+	 *  determine the actual length from a header segment later.
+	 *  This is normal for all modern (Wide,TR1/2/3) formats.
+	 */
+	if (tape_len <= 0) {
+		TRACE(ft_t_noise,
+		      "Unknown tape length, using maximal timeouts");
+		length = QIC_TOP_TAPE_LEN;	/* use worst case values */
+	} else {
+		length = tape_len;		/* use actual values */
+	}
+	if (ft_drive_type.speed == 0) {
+		ff_speed = speed; 
+	} else {
+		ff_speed = ft_drive_type.speed;
+	}
+	/*  time to go from bot to eot at normal speed (data rate):
+	 *  time = (1+delta) * length (ft) * 12 (inch/ft) / speed (ips)
+	 *  delta = 10 % for seek speed, 20 % for rewind speed.
+	 */
+	ftape_timeout.seek = (length * 132 * FT_SECOND) / speed;
+	ftape_timeout.rewind = (length * 144 * FT_SECOND) / (10 * ff_speed);
+	ftape_timeout.reset = 20 * FT_SECOND + ftape_timeout.rewind;
+	TRACE(ft_t_noise, "timeouts for speed = %d, length = %d\n"
+	      KERN_INFO "seek timeout  : %d sec\n"
+	      KERN_INFO "rewind timeout: %d sec\n"
+	      KERN_INFO "reset timeout : %d sec",
+	      speed, length,
+	      (ftape_timeout.seek + 500) / 1000,
+	      (ftape_timeout.rewind + 500) / 1000,
+	      (ftape_timeout.reset + 500) / 1000);
+	TRACE_EXIT;
+}
+
+/* This function calibrates the datarate (i.e. determines the maximal
+ * usable data rate) and sets the global variable ft_qic_std to qic_std
+ *
+ */
+int ftape_calibrate_data_rate(unsigned int qic_std)
+{
+	int rate = ft_fdc_rate_limit;
+	int result;
+	TRACE_FUN(ft_t_flow);
+
+	ft_qic_std = qic_std;
+
+	if (ft_qic_std == -1) {
+		TRACE_ABORT(-EIO, ft_t_err,
+		"Unable to determine data rate if QIC standard is unknown");
+	}
+
+	/*  Select highest rate supported by both fdc and drive.
+	 *  Start with highest rate supported by the fdc.
+	 */
+	while (fdc_set_data_rate(rate) < 0 && rate > 250) {
+		rate /= 2;
+	}
+	TRACE(ft_t_info,
+	      "Highest FDC supported data rate: %d Kbps", rate);
+	ft_fdc_max_rate = rate;
+	do {
+		result = ftape_set_data_rate(rate, ft_qic_std);
+	} while (result == -EINVAL && (rate /= 2) > 250);
+	if (result < 0) {
+		TRACE_ABORT(-EIO, ft_t_err, "set datarate failed");
+	}
+	ft_data_rate = rate;
+	TRACE_EXIT 0;
+}
+
+static int ftape_init_drive(void)
+{
+	int status;
+	qic_model model;
+	unsigned int qic_std;
+	unsigned int data_rate;
+	TRACE_FUN(ft_t_flow);
+
+	ftape_init_drive_needed = 0; /* don't retry if this fails ? */
+	TRACE_CATCH(ftape_report_raw_drive_status(&status),);
+	if (status & QIC_STATUS_CARTRIDGE_PRESENT) {
+		if (!(status & QIC_STATUS_AT_BOT)) {
+			/*  Antique drives will get here after a soft reset,
+			 *  modern ones only if the driver is loaded when the
+			 *  tape wasn't rewound properly.
+			 */
+			/* Tape should be at bot if new cartridge ! */
+			ftape_seek_to_bot();
+		}
+		if (!(status & QIC_STATUS_REFERENCED)) {
+			TRACE(ft_t_flow, "starting seek_load_point");
+			TRACE_CATCH(ftape_command_wait(QIC_SEEK_LOAD_POINT,
+						       ftape_timeout.reset,
+						       &status),);
+		}
+	}
+	ft_formatted = (status & QIC_STATUS_REFERENCED) != 0;
+	if (!ft_formatted) {
+		TRACE(ft_t_warn, "Warning: tape is not formatted !");
+	}
+
+	/*  report configuration aborts when ftape_tape_len == -1
+	 *  unknown qic_std is okay if not formatted.
+	 */
+	TRACE_CATCH(ftape_report_configuration(&model,
+					       &data_rate,
+					       &qic_std,
+					       &ftape_tape_len),);
+
+	/*  Maybe add the following to the /proc entry
+	 */
+	TRACE(ft_t_info, "%s drive @ %d Kbps",
+	      (model == prehistoric) ? "prehistoric" :
+	      ((model == pre_qic117c) ? "pre QIC-117C" :
+	       ((model == post_qic117b) ? "post QIC-117B" :
+		"post QIC-117D")), data_rate);
+
+	if (ft_formatted) {
+		/*  initialize ft_used_data_rate to maximum value 
+		 *  and set ft_qic_std
+		 */
+		TRACE_CATCH(ftape_calibrate_data_rate(qic_std),);
+		if (ftape_tape_len == 0) {
+			TRACE(ft_t_info, "unknown length QIC-%s tape",
+			      (ft_qic_std == QIC_TAPE_QIC40) ? "40" :
+			      ((ft_qic_std == QIC_TAPE_QIC80) ? "80" :
+			       ((ft_qic_std == QIC_TAPE_QIC3010) 
+				? "3010" : "3020")));
+		} else {
+			TRACE(ft_t_info, "%d ft. QIC-%s tape", ftape_tape_len,
+			      (ft_qic_std == QIC_TAPE_QIC40) ? "40" :
+			      ((ft_qic_std == QIC_TAPE_QIC80) ? "80" :
+			       ((ft_qic_std == QIC_TAPE_QIC3010)
+				? "3010" : "3020")));
+		}
+		ftape_calc_timeouts(ft_qic_std, ft_data_rate, ftape_tape_len);
+		/* soft write-protect QIC-40/QIC-80 cartridges used with a
+		 * Colorado T3000 drive. Buggy hardware!
+		 */
+		if ((ft_drive_type.vendor_id == 0x011c6) &&
+		    ((ft_qic_std == QIC_TAPE_QIC40 ||
+		      ft_qic_std == QIC_TAPE_QIC80) &&
+		     !ft_write_protected)) {
+			TRACE(ft_t_warn, "\n"
+	KERN_INFO "The famous Colorado T3000 bug:\n"
+	KERN_INFO "%s drives can't write QIC40 and QIC80\n"
+	KERN_INFO "cartridges but don't set the write-protect flag!",
+			      ft_drive_type.name);
+			ft_write_protected = 1;
+		}
+	} else {
+		/*  Doesn't make too much sense to set the data rate
+		 *  because we don't know what to use for the write
+		 *  precompensation.
+		 *  Need to do this again when formatting the cartridge.
+		 */
+		ft_data_rate = data_rate;
+		ftape_calc_timeouts(QIC_TAPE_QIC40,
+				    data_rate,
+				    ftape_tape_len);
+	}
+	ftape_new_cartridge();
+	TRACE_EXIT 0;
+}
+
+static void ftape_munmap(void)
+{
+	int i;
+	TRACE_FUN(ft_t_flow);
+	
+	for (i = 0; i < ft_nr_buffers; i++) {
+		ft_buffer[i]->mmapped = 0;
+	}
+	TRACE_EXIT;
+}
+
+/*   Map the dma buffers into the virtual address range given by vma.
+ *   We only check the caller doesn't map non-existent buffers. We
+ *   don't check for multiple mappings.
+ */
+int ftape_mmap(struct vm_area_struct *vma)
+{
+	int num_buffers;
+	int i;
+	TRACE_FUN(ft_t_flow);
+	
+	if (ft_failure) {
+		TRACE_EXIT -ENODEV;
+	}
+	if (!(vma->vm_flags & (VM_READ|VM_WRITE))) {
+		TRACE_ABORT(-EINVAL, ft_t_err, "Undefined mmap() access");
+	}
+	if (vma_get_pgoff(vma) != 0) {
+		TRACE_ABORT(-EINVAL, ft_t_err, "page offset must be 0");
+	}
+	if ((vma->vm_end - vma->vm_start) % FT_BUFF_SIZE != 0) {
+		TRACE_ABORT(-EINVAL, ft_t_err,
+			    "size = %ld, should be a multiple of %d",
+			    vma->vm_end - vma->vm_start,
+			    FT_BUFF_SIZE);
+	}
+	num_buffers = (vma->vm_end - vma->vm_start) / FT_BUFF_SIZE;
+	if (num_buffers > ft_nr_buffers) {
+		TRACE_ABORT(-EINVAL,
+			    ft_t_err, "size = %ld, should be less than %d",
+			    vma->vm_end - vma->vm_start,
+			    ft_nr_buffers * FT_BUFF_SIZE);
+	}
+	if (ft_driver_state != idle) {
+		/* this also clears the buffer states 
+		 */
+		ftape_abort_operation();
+	} else {
+		ftape_reset_buffer();
+	}
+	for (i = 0; i < num_buffers; i++) {
+		unsigned long pfn;
+
+		pfn = virt_to_phys(ft_buffer[i]->address) >> PAGE_SHIFT;
+		TRACE_CATCH(remap_pfn_range(vma, vma->vm_start +
+					     i * FT_BUFF_SIZE,
+					     pfn,
+					     FT_BUFF_SIZE,
+					     vma->vm_page_prot),
+			    _res = -EAGAIN);
+		TRACE(ft_t_noise, "remapped dma buffer @ %p to location @ %p",
+		      ft_buffer[i]->address,
+		      (void *)(vma->vm_start + i * FT_BUFF_SIZE));
+	}
+	for (i = 0; i < num_buffers; i++) {
+		memset(ft_buffer[i]->address, 0xAA, FT_BUFF_SIZE);
+		ft_buffer[i]->mmapped++;
+	}	
+	TRACE_EXIT 0;
+}
+
+static void ftape_init_driver(void); /* forward declaration */
+
+/*      OPEN routine called by kernel-interface code
+ */
+int ftape_enable(int drive_selection)
+{
+	TRACE_FUN(ft_t_any);
+
+	if (ft_drive_sel == -1 || ft_drive_sel != drive_selection) {
+		/* Other selection than last time
+		 */
+		ftape_init_driver();
+	}
+	ft_drive_sel = FTAPE_SEL(drive_selection);
+	ft_failure = 0;
+	TRACE_CATCH(fdc_init(),); /* init & detect fdc */
+	TRACE_CATCH(ftape_activate_drive(&ft_drive_type),
+		    fdc_disable();
+		    fdc_release_irq_and_dma();
+		    fdc_release_regions());
+	TRACE_CATCH(ftape_get_drive_status(), ftape_detach_drive());
+	if (ft_drive_type.vendor_id == UNKNOWN_VENDOR) {
+		ftape_log_vendor_id();
+	}
+	if (ft_new_tape) {
+		ftape_init_drive_needed = 1;
+	}
+	if (!ft_no_tape && ftape_init_drive_needed) {
+		TRACE_CATCH(ftape_init_drive(), ftape_detach_drive());
+	}
+	ftape_munmap(); /* clear the mmap flag */
+	clear_history();
+	TRACE_EXIT 0;
+}
+
+/*   release routine called by the high level interface modules
+ *   zftape or sftape.
+ */
+void ftape_disable(void)
+{
+	int i;
+	TRACE_FUN(ft_t_any);
+
+	for (i = 0; i < ft_nr_buffers; i++) {
+		if (ft_buffer[i]->mmapped) {
+			TRACE(ft_t_noise, "first byte of buffer %d: 0x%02x",
+			      i, *ft_buffer[i]->address);
+		}
+	}
+	if (sigtestsetmask(&current->pending.signal, _DONT_BLOCK) && 
+	    !(sigtestsetmask(&current->pending.signal, _NEVER_BLOCK)) &&
+	    ftape_tape_running) {
+		TRACE(ft_t_warn,
+		      "Interrupted by fatal signal and tape still running");
+		ftape_dumb_stop();
+		ftape_abort_operation(); /* it's annoying */
+	} else {
+		ftape_set_state(idle);
+	}
+	ftape_detach_drive();
+	if (ft_history.used) {
+		TRACE(ft_t_info, "== Non-fatal errors this run: ==");
+		TRACE(ft_t_info, "fdc isr statistics:\n"
+		      KERN_INFO " id_am_errors     : %3d\n"
+		      KERN_INFO " id_crc_errors    : %3d\n"
+		      KERN_INFO " data_am_errors   : %3d\n"
+		      KERN_INFO " data_crc_errors  : %3d\n"
+		      KERN_INFO " overrun_errors   : %3d\n"
+		      KERN_INFO " no_data_errors   : %3d\n"
+		      KERN_INFO " retries          : %3d",
+		      ft_history.id_am_errors,   ft_history.id_crc_errors,
+		      ft_history.data_am_errors, ft_history.data_crc_errors,
+		      ft_history.overrun_errors, ft_history.no_data_errors,
+		      ft_history.retries);
+		if (ft_history.used & 1) {
+			TRACE(ft_t_info, "ecc statistics:\n"
+			      KERN_INFO " crc_errors       : %3d\n"
+			      KERN_INFO " crc_failures     : %3d\n"
+			      KERN_INFO " ecc_failures     : %3d\n"
+			      KERN_INFO " sectors corrected: %3d",
+			      ft_history.crc_errors,   ft_history.crc_failures,
+			      ft_history.ecc_failures, ft_history.corrected);
+		}
+		if (ft_history.defects > 0) {
+			TRACE(ft_t_warn, "Warning: %d media defects!",
+			      ft_history.defects);
+		}
+		if (ft_history.rewinds > 0) {
+			TRACE(ft_t_info, "tape motion statistics:\n"
+			      KERN_INFO "repositions       : %3d",
+			      ft_history.rewinds);
+		}
+	}
+	ft_failure = 1;
+	TRACE_EXIT;
+}
+
+static void ftape_init_driver(void)
+{
+	TRACE_FUN(ft_t_flow);
+
+	ft_drive_type.vendor_id = UNKNOWN_VENDOR;
+	ft_drive_type.speed     = 0;
+	ft_drive_type.wake_up   = unknown_wake_up;
+	ft_drive_type.name      = "Unknown";
+
+	ftape_timeout.seek      = 650 * FT_SECOND;
+	ftape_timeout.reset     = 670 * FT_SECOND;
+	ftape_timeout.rewind    = 650 * FT_SECOND;
+	ftape_timeout.head_seek =  15 * FT_SECOND;
+	ftape_timeout.stop      =   5 * FT_SECOND;
+	ftape_timeout.pause     =  16 * FT_SECOND;
+
+	ft_qic_std             = -1;
+	ftape_tape_len         = 0;  /* unknown */
+	ftape_current_command  = 0;
+	ftape_current_cylinder = -1;
+
+	ft_segments_per_track       = 102;
+	ftape_segments_per_head     = 1020;
+	ftape_segments_per_cylinder = 4;
+	ft_tracks_per_tape          = 20;
+
+	ft_failure = 1;
+
+	ft_formatted       = 0;
+	ft_no_tape         = 1;
+	ft_write_protected = 1;
+	ft_new_tape        = 1;
+
+	ft_driver_state = idle;
+
+	ft_data_rate = 
+		ft_fdc_max_rate   = 500;
+	ft_drive_max_rate = 0; /* triggers set_rate_test() */
+
+	ftape_init_drive_needed = 1;
+
+	ft_header_segment_1    = -1;
+	ft_header_segment_2    = -1;
+	ft_used_header_segment = -1;
+	ft_first_data_segment  = -1;
+	ft_last_data_segment   = -1;
+
+	ft_location.track = -1;
+	ft_location.known = 0;
+
+	ftape_tape_running = 0;
+	ftape_might_be_off_track = 1;
+
+	ftape_new_cartridge();	/* init some tape related variables */
+	ftape_init_bsm();
+	TRACE_EXIT;
+}