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;
+}