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, 1739 insertions, 0 deletions

diff --git a/drivers/scsi/fdomain.c b/drivers/scsi/fdomain.c
new file mode 100644
index 000000000000..a843c080c1d8
--- /dev/null
+++ b/drivers/scsi/fdomain.c
@@ -0,0 +1,1739 @@
+/* fdomain.c -- Future Domain TMC-16x0 SCSI driver
+ * Created: Sun May  3 18:53:19 1992 by faith@cs.unc.edu
+ * Revised: Mon Dec 28 21:59:02 1998 by faith@acm.org
+ * Author: Rickard E. Faith, faith@cs.unc.edu
+ * Copyright 1992-1996, 1998 Rickard E. Faith (faith@acm.org)
+ * Shared IRQ supported added 7/7/2001  Alan Cox <alan@redhat.com>
+
+ * 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.
+
+ **************************************************************************
+
+ SUMMARY:
+
+ Future Domain BIOS versions supported for autodetect:
+    2.0, 3.0, 3.2, 3.4 (1.0), 3.5 (2.0), 3.6, 3.61
+ Chips are supported:
+    TMC-1800, TMC-18C50, TMC-18C30, TMC-36C70
+ Boards supported:
+    Future Domain TMC-1650, TMC-1660, TMC-1670, TMC-1680, TMC-1610M/MER/MEX
+    Future Domain TMC-3260 (PCI)
+    Quantum ISA-200S, ISA-250MG
+    Adaptec AHA-2920A (PCI) [BUT *NOT* AHA-2920C -- use aic7xxx instead]
+    IBM ?
+ LILO/INSMOD command-line options:
+    fdomain=<PORT_BASE>,<IRQ>[,<ADAPTER_ID>]
+
+
+    
+ NOTE:
+
+ The Adaptec AHA-2920C has an Adaptec AIC-7850 chip on it.
+ Use the aic7xxx driver for this board.
+       
+ The Adaptec AHA-2920A has a Future Domain chip on it, so this is the right
+ driver for that card.  Unfortunately, the boxes will probably just say
+ "2920", so you'll have to look on the card for a Future Domain logo, or a
+ letter after the 2920.
+
+ 
+ 
+ THANKS:
+
+ Thanks to Adaptec for providing PCI boards for testing.  This finally
+ enabled me to test the PCI detection and correct it for PCI boards that do
+ not have a BIOS at a standard ISA location.  For PCI boards, LILO/INSMOD
+ command-line options should no longer be needed.  --RF 18Nov98
+
+
+ 
+ DESCRIPTION:
+ 
+ This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680
+ TMC-1650/1670, and TMC-3260 SCSI host adapters.  The 1650 and 1670 have a
+ 25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin
+ high-density external connector.  The 1670 and 1680 have floppy disk
+ controllers built in.  The TMC-3260 is a PCI bus card.
+
+ Future Domain's older boards are based on the TMC-1800 chip, and this
+ driver was originally written for a TMC-1680 board with the TMC-1800 chip.
+ More recently, boards are being produced with the TMC-18C50 and TMC-18C30
+ chips.  The latest and greatest board may not work with this driver.  If
+ you have to patch this driver so that it will recognize your board's BIOS
+ signature, then the driver may fail to function after the board is
+ detected.
+
+ Please note that the drive ordering that Future Domain implemented in BIOS
+ versions 3.4 and 3.5 is the opposite of the order (currently) used by the
+ rest of the SCSI industry.  If you have BIOS version 3.4 or 3.5, and have
+ more than one drive, then the drive ordering will be the reverse of that
+ which you see under DOS.  For example, under DOS SCSI ID 0 will be D: and
+ SCSI ID 1 will be C: (the boot device).  Under Linux, SCSI ID 0 will be
+ /dev/sda and SCSI ID 1 will be /dev/sdb.  The Linux ordering is consistent
+ with that provided by all the other SCSI drivers for Linux.  If you want
+ this changed, you will probably have to patch the higher level SCSI code.
+ If you do so, please send me patches that are protected by #ifdefs.
+
+ If you have a TMC-8xx or TMC-9xx board, then this is not the driver for
+ your board.  Please refer to the Seagate driver for more information and
+ possible support.
+
+ 
+ 
+ HISTORY:
+
+ Linux       Driver      Driver
+ Version     Version     Date         Support/Notes
+
+             0.0          3 May 1992  V2.0 BIOS; 1800 chip
+ 0.97        1.9         28 Jul 1992
+ 0.98.6      3.1         27 Nov 1992
+ 0.99        3.2          9 Dec 1992
+
+ 0.99.3      3.3         10 Jan 1993  V3.0 BIOS
+ 0.99.5      3.5         18 Feb 1993
+ 0.99.10     3.6         15 May 1993  V3.2 BIOS; 18C50 chip
+ 0.99.11     3.17         3 Jul 1993  (now under RCS)
+ 0.99.12     3.18        13 Aug 1993
+ 0.99.14     5.6         31 Oct 1993  (reselection code removed)
+
+ 0.99.15     5.9         23 Jan 1994  V3.4 BIOS (preliminary)
+ 1.0.8/1.1.1 5.15         1 Apr 1994  V3.4 BIOS; 18C30 chip (preliminary)
+ 1.0.9/1.1.3 5.16         7 Apr 1994  V3.4 BIOS; 18C30 chip
+ 1.1.38      5.18        30 Jul 1994  36C70 chip (PCI version of 18C30)
+ 1.1.62      5.20         2 Nov 1994  V3.5 BIOS
+ 1.1.73      5.22         7 Dec 1994  Quantum ISA-200S board; V2.0 BIOS
+
+ 1.1.82      5.26        14 Jan 1995  V3.5 BIOS; TMC-1610M/MER/MEX board
+ 1.2.10      5.28         5 Jun 1995  Quantum ISA-250MG board; V2.0, V2.01 BIOS
+ 1.3.4       5.31        23 Jun 1995  PCI BIOS-32 detection (preliminary)
+ 1.3.7       5.33         4 Jul 1995  PCI BIOS-32 detection
+ 1.3.28      5.36        17 Sep 1995  V3.61 BIOS; LILO command-line support
+ 1.3.34      5.39        12 Oct 1995  V3.60 BIOS; /proc
+ 1.3.72      5.39         8 Feb 1996  Adaptec AHA-2920 board
+ 1.3.85      5.41         4 Apr 1996
+ 2.0.12      5.44         8 Aug 1996  Use ID 7 for all PCI cards
+ 2.1.1       5.45         2 Oct 1996  Update ROM accesses for 2.1.x
+ 2.1.97      5.46        23 Apr 1998  Rewritten PCI detection routines [mj]
+ 2.1.11x     5.47         9 Aug 1998  Touched for 8 SCSI disk majors support
+             5.48        18 Nov 1998  BIOS no longer needed for PCI detection
+ 2.2.0       5.50        28 Dec 1998  Support insmod parameters
+ 
+
+ REFERENCES USED:
+
+ "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation,
+ 1990.
+
+ "Technical Reference Manual: 18C50 SCSI Host Adapter Chip", Future Domain
+ Corporation, January 1992.
+
+ "LXT SCSI Products: Specifications and OEM Technical Manual (Revision
+ B/September 1991)", Maxtor Corporation, 1991.
+
+ "7213S product Manual (Revision P3)", Maxtor Corporation, 1992.
+
+ "Draft Proposed American National Standard: Small Computer System
+ Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109,
+ revision 10h, October 17, 1991)
+
+ Private communications, Drew Eckhardt (drew@cs.colorado.edu) and Eric
+ Youngdale (ericy@cais.com), 1992.
+
+ Private communication, Tuong Le (Future Domain Engineering department),
+ 1994. (Disk geometry computations for Future Domain BIOS version 3.4, and
+ TMC-18C30 detection.)
+
+ Hogan, Thom. The Programmer's PC Sourcebook. Microsoft Press, 1988. Page
+ 60 (2.39: Disk Partition Table Layout).
+
+ "18C30 Technical Reference Manual", Future Domain Corporation, 1993, page
+ 6-1.
+
+
+ 
+ NOTES ON REFERENCES:
+
+ The Maxtor manuals were free.  Maxtor telephone technical support is
+ great!
+
+ The Future Domain manuals were $25 and $35.  They document the chip, not
+ the TMC-16x0 boards, so some information I had to guess at.  In 1992,
+ Future Domain sold DOS BIOS source for $250 and the UN*X driver source was
+ $750, but these required a non-disclosure agreement, so even if I could
+ have afforded them, they would *not* have been useful for writing this
+ publically distributable driver.  Future Domain technical support has
+ provided some information on the phone and have sent a few useful FAXs.
+ They have been much more helpful since they started to recognize that the
+ word "Linux" refers to an operating system :-).
+
+ 
+
+ ALPHA TESTERS:
+
+ There are many other alpha testers that come and go as the driver
+ develops.  The people listed here were most helpful in times of greatest
+ need (mostly early on -- I've probably left out a few worthy people in
+ more recent times):
+
+ Todd Carrico (todd@wutc.wustl.edu), Dan Poirier (poirier@cs.unc.edu ), Ken
+ Corey (kenc@sol.acs.unt.edu), C. de Bruin (bruin@bruin@sterbbs.nl), Sakari
+ Aaltonen (sakaria@vipunen.hit.fi), John Rice (rice@xanth.cs.odu.edu), Brad
+ Yearwood (brad@optilink.com), and Ray Toy (toy@soho.crd.ge.com).
+
+ Special thanks to Tien-Wan Yang (twyang@cs.uh.edu), who graciously lent me
+ his 18C50-based card for debugging.  He is the sole reason that this
+ driver works with the 18C50 chip.
+
+ Thanks to Dave Newman (dnewman@crl.com) for providing initial patches for
+ the version 3.4 BIOS.
+
+ Thanks to James T. McKinley (mckinley@msupa.pa.msu.edu) for providing
+ patches that support the TMC-3260, a PCI bus card with the 36C70 chip.
+ The 36C70 chip appears to be "completely compatible" with the 18C30 chip.
+
+ Thanks to Eric Kasten (tigger@petroglyph.cl.msu.edu) for providing the
+ patch for the version 3.5 BIOS.
+
+ Thanks for Stephen Henson (shenson@nyx10.cs.du.edu) for providing the
+ patch for the Quantum ISA-200S SCSI adapter.
+ 
+ Thanks to Adam Bowen for the signature to the 1610M/MER/MEX scsi cards, to
+ Martin Andrews (andrewm@ccfadm.eeg.ccf.org) for the signature to some
+ random TMC-1680 repackaged by IBM; and to Mintak Ng (mintak@panix.com) for
+ the version 3.61 BIOS signature.
+
+ Thanks for Mark Singer (elf@netcom.com) and Richard Simpson
+ (rsimpson@ewrcsdra.demon.co.uk) for more Quantum signatures and detective
+ work on the Quantum RAM layout.
+
+ Special thanks to James T. McKinley (mckinley@msupa.pa.msu.edu) for
+ providing patches for proper PCI BIOS32-mediated detection of the TMC-3260
+ card (a PCI bus card with the 36C70 chip).  Please send James PCI-related
+ bug reports.
+
+ Thanks to Tom Cavin (tec@usa1.com) for preliminary command-line option
+ patches.
+
+ New PCI detection code written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+
+ Insmod parameter code based on patches from Daniel Graham
+ <graham@balance.uoregon.edu>. 
+ 
+ All of the alpha testers deserve much thanks.
+
+
+
+ NOTES ON USER DEFINABLE OPTIONS:
+
+ DEBUG: This turns on the printing of various debug information.
+
+ ENABLE_PARITY: This turns on SCSI parity checking.  With the current
+ driver, all attached devices must support SCSI parity.  If none of your
+ devices support parity, then you can probably get the driver to work by
+ turning this option off.  I have no way of testing this, however, and it
+ would appear that no one ever uses this option.
+
+ FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the
+ 18C30 chip have a 2k cache).  When this many 512 byte blocks are filled by
+ the SCSI device, an interrupt will be raised.  Therefore, this could be as
+ low as 0, or as high as 16.  Note, however, that values which are too high
+ or too low seem to prevent any interrupts from occurring, and thereby lock
+ up the machine.  I have found that 2 is a good number, but throughput may
+ be increased by changing this value to values which are close to 2.
+ Please let me know if you try any different values.
+
+ RESELECTION: This is no longer an option, since I gave up trying to
+ implement it in version 4.x of this driver.  It did not improve
+ performance at all and made the driver unstable (because I never found one
+ of the two race conditions which were introduced by the multiple
+ outstanding command code).  The instability seems a very high price to pay
+ just so that you don't have to wait for the tape to rewind.  If you want
+ this feature implemented, send me patches.  I'll be happy to send a copy
+ of my (broken) driver to anyone who would like to see a copy.
+
+ **************************************************************************/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/pci.h>
+#include <linux/stat.h>
+#include <linux/delay.h>
+#include <scsi/scsicam.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_ioctl.h>
+#include "fdomain.h"
+
+MODULE_AUTHOR("Rickard E. Faith");
+MODULE_DESCRIPTION("Future domain SCSI driver");
+MODULE_LICENSE("GPL");
+
+  
+#define VERSION          "$Revision: 5.51 $"
+
+/* START OF USER DEFINABLE OPTIONS */
+
+#define DEBUG            0      /* Enable debugging output */
+#define ENABLE_PARITY    1      /* Enable SCSI Parity */
+#define FIFO_COUNT       2      /* Number of 512 byte blocks before INTR */
+
+/* END OF USER DEFINABLE OPTIONS */
+
+#if DEBUG
+#define EVERY_ACCESS     0      /* Write a line on every scsi access */
+#define ERRORS_ONLY      1      /* Only write a line if there is an error */
+#define DEBUG_DETECT     0      /* Debug fdomain_16x0_detect() */
+#define DEBUG_MESSAGES   1      /* Debug MESSAGE IN phase */
+#define DEBUG_ABORT      1      /* Debug abort() routine */
+#define DEBUG_RESET      1      /* Debug reset() routine */
+#define DEBUG_RACE       1      /* Debug interrupt-driven race condition */
+#else
+#define EVERY_ACCESS     0      /* LEAVE THESE ALONE--CHANGE THE ONES ABOVE */
+#define ERRORS_ONLY      0
+#define DEBUG_DETECT     0
+#define DEBUG_MESSAGES   0
+#define DEBUG_ABORT      0
+#define DEBUG_RESET      0
+#define DEBUG_RACE       0
+#endif
+
+/* Errors are reported on the line, so we don't need to report them again */
+#if EVERY_ACCESS
+#undef ERRORS_ONLY
+#define ERRORS_ONLY      0
+#endif
+
+#if ENABLE_PARITY
+#define PARITY_MASK      0x08
+#else
+#define PARITY_MASK      0x00
+#endif
+
+enum chip_type {
+   unknown          = 0x00,
+   tmc1800          = 0x01,
+   tmc18c50         = 0x02,
+   tmc18c30         = 0x03,
+};
+
+enum {
+   in_arbitration   = 0x02,
+   in_selection     = 0x04,
+   in_other         = 0x08,
+   disconnect       = 0x10,
+   aborted          = 0x20,
+   sent_ident       = 0x40,
+};
+
+enum in_port_type {
+   Read_SCSI_Data   =  0,
+   SCSI_Status      =  1,
+   TMC_Status       =  2,
+   FIFO_Status      =  3,       /* tmc18c50/tmc18c30 only */
+   Interrupt_Cond   =  4,       /* tmc18c50/tmc18c30 only */
+   LSB_ID_Code      =  5,
+   MSB_ID_Code      =  6,
+   Read_Loopback    =  7,
+   SCSI_Data_NoACK  =  8,
+   Interrupt_Status =  9,
+   Configuration1   = 10,
+   Configuration2   = 11,       /* tmc18c50/tmc18c30 only */
+   Read_FIFO        = 12,
+   FIFO_Data_Count  = 14
+};
+
+enum out_port_type {
+   Write_SCSI_Data  =  0,
+   SCSI_Cntl        =  1,
+   Interrupt_Cntl   =  2,
+   SCSI_Mode_Cntl   =  3,
+   TMC_Cntl         =  4,
+   Memory_Cntl      =  5,       /* tmc18c50/tmc18c30 only */
+   Write_Loopback   =  7,
+   IO_Control       = 11,       /* tmc18c30 only */
+   Write_FIFO       = 12
+};
+
+/* .bss will zero all the static variables below */
+static int               port_base;
+static unsigned long     bios_base;
+static void __iomem *    bios_mem;
+static int               bios_major;
+static int               bios_minor;
+static int               PCI_bus;
+static int               Quantum;       /* Quantum board variant */
+static int               interrupt_level;
+static volatile int      in_command;
+static struct scsi_cmnd  *current_SC;
+static enum chip_type    chip              = unknown;
+static int               adapter_mask;
+static int               this_id;
+static int               setup_called;
+
+#if DEBUG_RACE
+static volatile int      in_interrupt_flag;
+#endif
+
+static int               FIFO_Size = 0x2000; /* 8k FIFO for
+                                                pre-tmc18c30 chips */
+
+static irqreturn_t       do_fdomain_16x0_intr( int irq, void *dev_id,
+                                            struct pt_regs * regs );
+/* Allow insmod parameters to be like LILO parameters.  For example:
+   insmod fdomain fdomain=0x140,11 */
+static char * fdomain = NULL;
+module_param(fdomain, charp, 0);
+
+static unsigned long addresses[] = {
+   0xc8000,
+   0xca000,
+   0xce000,
+   0xde000,
+   0xcc000,             /* Extra addresses for PCI boards */
+   0xd0000,
+   0xe0000,
+};
+#define ADDRESS_COUNT (sizeof( addresses ) / sizeof( unsigned ))
+                       
+static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 };
+#define PORT_COUNT (sizeof( ports ) / sizeof( unsigned short ))
+
+static unsigned short ints[] = { 3, 5, 10, 11, 12, 14, 15, 0 };
+
+/*
+
+  READ THIS BEFORE YOU ADD A SIGNATURE!
+
+  READING THIS SHORT NOTE CAN SAVE YOU LOTS OF TIME!
+
+  READ EVERY WORD, ESPECIALLY THE WORD *NOT*
+
+  This driver works *ONLY* for Future Domain cards using the TMC-1800,
+  TMC-18C50, or TMC-18C30 chip.  This includes models TMC-1650, 1660, 1670,
+  and 1680.  These are all 16-bit cards.
+
+  The following BIOS signature signatures are for boards which do *NOT*
+  work with this driver (these TMC-8xx and TMC-9xx boards may work with the
+  Seagate driver):
+
+  FUTURE DOMAIN CORP. (C) 1986-1988 V4.0I 03/16/88
+  FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89
+  FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89
+  FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90
+  FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90
+  FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90
+  FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92
+
+  (The cards which do *NOT* work are all 8-bit cards -- although some of
+  them have a 16-bit form-factor, the upper 8-bits are used only for IRQs
+  and are *NOT* used for data.  You can tell the difference by following
+  the tracings on the circuit board -- if only the IRQ lines are involved,
+  you have a "8-bit" card, and should *NOT* use this driver.)
+
+*/
+
+static struct signature {
+   const char *signature;
+   int  sig_offset;
+   int  sig_length;
+   int  major_bios_version;
+   int  minor_bios_version;
+   int  flag; /* 1 == PCI_bus, 2 == ISA_200S, 3 == ISA_250MG, 4 == ISA_200S */
+} signatures[] = {
+   /*          1         2         3         4         5         6 */
+   /* 123456789012345678901234567890123456789012345678901234567890 */
+   { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89",  5, 50,  2,  0, 0 },
+   { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V1.07/28/89",  5, 50,  2,  0, 0 },
+   { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 72, 50,  2,  0, 2 },
+   { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.0",        73, 43,  2,  0, 3 },
+   { "FUTURE DOMAIN CORP. (C) 1991 1800-V2.0.",            72, 39,  2,  0, 4 },
+   { "FUTURE DOMAIN CORP. (C) 1992 V3.00.004/02/92",        5, 44,  3,  0, 0 },
+   { "FUTURE DOMAIN TMC-18XX (C) 1993 V3.203/12/93",        5, 44,  3,  2, 0 },
+   { "IBM F1 P2 BIOS v1.0104/29/93",                        5, 28,  3, -1, 0 },
+   { "Future Domain Corp. V1.0008/18/93",                   5, 33,  3,  4, 0 },
+   { "Future Domain Corp. V1.0008/18/93",                  26, 33,  3,  4, 1 },
+   { "Adaptec AHA-2920 PCI-SCSI Card",                     42, 31,  3, -1, 1 },
+   { "IBM F1 P264/32",                                      5, 14,  3, -1, 1 },
+                                /* This next signature may not be a 3.5 bios */
+   { "Future Domain Corp. V2.0108/18/93",                   5, 33,  3,  5, 0 },
+   { "FUTURE DOMAIN CORP.  V3.5008/18/93",                  5, 34,  3,  5, 0 },
+   { "FUTURE DOMAIN 18c30/18c50/1800 (C) 1994 V3.5",        5, 44,  3,  5, 0 },
+   { "FUTURE DOMAIN CORP.  V3.6008/18/93",                  5, 34,  3,  6, 0 },
+   { "FUTURE DOMAIN CORP.  V3.6108/18/93",                  5, 34,  3,  6, 0 },
+   { "FUTURE DOMAIN TMC-18XX",                              5, 22, -1, -1, 0 },
+
+   /* READ NOTICE ABOVE *BEFORE* YOU WASTE YOUR TIME ADDING A SIGNATURE
+    Also, fix the disk geometry code for your signature and send your
+    changes for faith@cs.unc.edu.  Above all, do *NOT* change any old
+    signatures!
+
+    Note that the last line will match a "generic" 18XX bios.  Because
+    Future Domain has changed the host SCSI ID and/or the location of the
+    geometry information in the on-board RAM area for each of the first
+    three BIOS's, it is still important to enter a fully qualified
+    signature in the table for any new BIOS's (after the host SCSI ID and
+    geometry location are verified). */
+};
+
+#define SIGNATURE_COUNT (sizeof( signatures ) / sizeof( struct signature ))
+
+static void print_banner( struct Scsi_Host *shpnt )
+{
+   if (!shpnt) return;          /* This won't ever happen */
+
+   if (bios_major < 0 && bios_minor < 0) {
+      printk(KERN_INFO "scsi%d: <fdomain> No BIOS; using scsi id %d\n",
+              shpnt->host_no, shpnt->this_id);
+   } else {
+      printk(KERN_INFO "scsi%d: <fdomain> BIOS version ", shpnt->host_no);
+
+      if (bios_major >= 0) printk("%d.", bios_major);
+      else                 printk("?.");
+
+      if (bios_minor >= 0) printk("%d", bios_minor);
+      else                 printk("?.");
+   
+      printk( " at 0x%lx using scsi id %d\n",
+              bios_base, shpnt->this_id );
+   }
+
+                                /* If this driver works for later FD PCI
+                                   boards, we will have to modify banner
+                                   for additional PCI cards, but for now if
+                                   it's PCI it's a TMC-3260 - JTM */
+   printk(KERN_INFO "scsi%d: <fdomain> %s chip at 0x%x irq ",
+           shpnt->host_no,
+           chip == tmc1800 ? "TMC-1800" : (chip == tmc18c50 ? "TMC-18C50" : (chip == tmc18c30 ? (PCI_bus ? "TMC-36C70 (PCI bus)" : "TMC-18C30") : "Unknown")),
+           port_base);
+
+   if (interrupt_level)
+        printk("%d", interrupt_level);
+   else
+        printk("<none>");
+
+   printk( "\n" );
+}
+
+int fdomain_setup(char *str)
+{
+        int ints[4];
+
+        (void)get_options(str, ARRAY_SIZE(ints), ints);
+
+        if (setup_called++ || ints[0] < 2 || ints[0] > 3) {
+                printk(KERN_INFO "scsi: <fdomain> Usage: fdomain=<PORT_BASE>,<IRQ>[,<ADAPTER_ID>]\n");
+                printk(KERN_ERR "scsi: <fdomain> Bad LILO/INSMOD parameters?\n");
+                return 0;
+        }
+
+        port_base       = ints[0] >= 1 ? ints[1] : 0;
+        interrupt_level = ints[0] >= 2 ? ints[2] : 0;
+        this_id         = ints[0] >= 3 ? ints[3] : 0;
+   
+        bios_major = bios_minor = -1; /* Use geometry for BIOS version >= 3.4 */
+        ++setup_called;
+        return 1;
+}
+
+__setup("fdomain=", fdomain_setup);
+
+
+static void do_pause(unsigned amount)   /* Pause for amount*10 milliseconds */
+{
+        mdelay(10*amount);
+}
+
+inline static void fdomain_make_bus_idle( void )
+{
+   outb(0, port_base + SCSI_Cntl);
+   outb(0, port_base + SCSI_Mode_Cntl);
+   if (chip == tmc18c50 || chip == tmc18c30)
+         outb(0x21 | PARITY_MASK, port_base + TMC_Cntl); /* Clear forced intr. */
+   else
+         outb(0x01 | PARITY_MASK, port_base + TMC_Cntl);
+}
+
+static int fdomain_is_valid_port( int port )
+{
+#if DEBUG_DETECT 
+   printk( " (%x%x),",
+           inb( port + MSB_ID_Code ), inb( port + LSB_ID_Code ) );
+#endif
+
+   /* The MCA ID is a unique id for each MCA compatible board.  We
+      are using ISA boards, but Future Domain provides the MCA ID
+      anyway.  We can use this ID to ensure that this is a Future
+      Domain TMC-1660/TMC-1680.
+    */
+
+   if (inb( port + LSB_ID_Code ) != 0xe9) { /* test for 0x6127 id */
+      if (inb( port + LSB_ID_Code ) != 0x27) return 0;
+      if (inb( port + MSB_ID_Code ) != 0x61) return 0;
+      chip = tmc1800;
+   } else {                                 /* test for 0xe960 id */
+      if (inb( port + MSB_ID_Code ) != 0x60) return 0;
+      chip = tmc18c50;
+
+                                /* Try to toggle 32-bit mode.  This only
+                                   works on an 18c30 chip.  (User reports
+                                   say this works, so we should switch to
+                                   it in the near future.) */
+
+      outb( 0x80, port + IO_Control );
+      if ((inb( port + Configuration2 ) & 0x80) == 0x80) {
+         outb( 0x00, port + IO_Control );
+         if ((inb( port + Configuration2 ) & 0x80) == 0x00) {
+            chip = tmc18c30;
+            FIFO_Size = 0x800;  /* 2k FIFO */
+         }
+      }
+                                /* If that failed, we are an 18c50. */
+   }
+
+   return 1;
+}
+
+static int fdomain_test_loopback( void )
+{
+   int i;
+   int result;
+
+   for (i = 0; i < 255; i++) {
+      outb( i, port_base + Write_Loopback );
+      result = inb( port_base + Read_Loopback );
+      if (i != result)
+            return 1;
+   }
+   return 0;
+}
+
+/* fdomain_get_irq assumes that we have a valid MCA ID for a
+   TMC-1660/TMC-1680 Future Domain board.  Now, check to be sure the
+   bios_base matches these ports.  If someone was unlucky enough to have
+   purchased more than one Future Domain board, then they will have to
+   modify this code, as we only detect one board here.  [The one with the
+   lowest bios_base.]
+
+   Note that this routine is only used for systems without a PCI BIOS32
+   (e.g., ISA bus).  For PCI bus systems, this routine will likely fail
+   unless one of the IRQs listed in the ints array is used by the board.
+   Sometimes it is possible to use the computer's BIOS setup screen to
+   configure a PCI system so that one of these IRQs will be used by the
+   Future Domain card. */
+
+static int fdomain_get_irq( int base )
+{
+   int options = inb(base + Configuration1);
+
+#if DEBUG_DETECT
+   printk("scsi: <fdomain> Options = %x\n", options);
+#endif
+ 
+   /* Check for board with lowest bios_base --
+      this isn't valid for the 18c30 or for
+      boards on the PCI bus, so just assume we
+      have the right board. */
+
+   if (chip != tmc18c30 && !PCI_bus && addresses[(options & 0xc0) >> 6 ] != bios_base)
+        return 0;
+   return ints[(options & 0x0e) >> 1];
+}
+
+static int fdomain_isa_detect( int *irq, int *iobase )
+{
+#ifndef PCMCIA
+   int i, j;
+   int base = 0xdeadbeef;
+   int flag = 0;
+
+#if DEBUG_DETECT
+   printk( "scsi: <fdomain> fdomain_isa_detect:" );
+#endif
+
+   for (i = 0; i < ADDRESS_COUNT; i++) {
+      void __iomem *p = ioremap(addresses[i], 0x2000);
+      if (!p)
+        continue;
+#if DEBUG_DETECT
+      printk( " %lx(%lx),", addresses[i], bios_base );
+#endif
+      for (j = 0; j < SIGNATURE_COUNT; j++) {
+         if (check_signature(p + signatures[j].sig_offset,
+                             signatures[j].signature,
+                             signatures[j].sig_length )) {
+            bios_major = signatures[j].major_bios_version;
+            bios_minor = signatures[j].minor_bios_version;
+            PCI_bus    = (signatures[j].flag == 1);
+            Quantum    = (signatures[j].flag > 1) ? signatures[j].flag : 0;
+            bios_base  = addresses[i];
+            bios_mem   = p;
+            goto found;
+         }
+      }
+      iounmap(p);
+   }
+ 
+found:
+   if (bios_major == 2) {
+      /* The TMC-1660/TMC-1680 has a RAM area just after the BIOS ROM.
+         Assuming the ROM is enabled (otherwise we wouldn't have been
+         able to read the ROM signature :-), then the ROM sets up the
+         RAM area with some magic numbers, such as a list of port
+         base addresses and a list of the disk "geometry" reported to
+         DOS (this geometry has nothing to do with physical geometry).
+       */
+
+      switch (Quantum) {
+      case 2:                   /* ISA_200S */
+      case 3:                   /* ISA_250MG */
+         base = readb(bios_mem + 0x1fa2) + (readb(bios_mem + 0x1fa3) << 8);
+         break;
+      case 4:                   /* ISA_200S (another one) */
+         base = readb(bios_mem + 0x1fa3) + (readb(bios_mem + 0x1fa4) << 8);
+         break;
+      default:
+         base = readb(bios_mem + 0x1fcc) + (readb(bios_mem + 0x1fcd) << 8);
+         break;
+      }
+   
+#if DEBUG_DETECT
+      printk( " %x,", base );
+#endif
+
+      for (i = 0; i < PORT_COUNT; i++) {
+        if (base == ports[i]) {
+                if (!request_region(base, 0x10, "fdomain"))
+                        break;
+                if (!fdomain_is_valid_port(base)) {
+                        release_region(base, 0x10);
+                        break;
+                }
+                *irq    = fdomain_get_irq( base );
+                *iobase = base;
+                return 1;
+        }
+      }
+
+      /* This is a bad sign.  It usually means that someone patched the
+         BIOS signature list (the signatures variable) to contain a BIOS
+         signature for a board *OTHER THAN* the TMC-1660/TMC-1680. */
+      
+#if DEBUG_DETECT
+      printk( " RAM FAILED, " );
+#endif
+   }
+
+   /* Anyway, the alternative to finding the address in the RAM is to just
+      search through every possible port address for one that is attached
+      to the Future Domain card.  Don't panic, though, about reading all
+      these random port addresses -- there are rumors that the Future
+      Domain BIOS does something very similar.
+
+      Do not, however, check ports which the kernel knows are being used by
+      another driver. */
+
+   for (i = 0; i < PORT_COUNT; i++) {
+      base = ports[i];
+      if (!request_region(base, 0x10, "fdomain")) {
+#if DEBUG_DETECT
+         printk( " (%x inuse),", base );
+#endif
+         continue;
+      }
+#if DEBUG_DETECT
+      printk( " %x,", base );
+#endif
+      flag = fdomain_is_valid_port(base);
+      if (flag)
+        break;
+      release_region(base, 0x10);
+   }
+
+#if DEBUG_DETECT
+   if (flag) printk( " SUCCESS\n" );
+   else      printk( " FAILURE\n" );
+#endif
+
+   if (!flag) return 0;         /* iobase not found */
+
+   *irq    = fdomain_get_irq( base );
+   *iobase = base;
+
+   return 1;                    /* success */
+#else
+   return 0;
+#endif
+}
+
+/* PCI detection function: int fdomain_pci_bios_detect(int* irq, int*
+   iobase) This function gets the Interrupt Level and I/O base address from
+   the PCI configuration registers. */
+
+#ifdef CONFIG_PCI
+static int fdomain_pci_bios_detect( int *irq, int *iobase, struct pci_dev **ret_pdev )
+{
+   unsigned int     pci_irq;                /* PCI interrupt line */
+   unsigned long    pci_base;               /* PCI I/O base address */
+   struct pci_dev   *pdev = NULL;
+
+#if DEBUG_DETECT
+   /* Tell how to print a list of the known PCI devices from bios32 and
+      list vendor and device IDs being used if in debug mode.  */
+      
+   printk( "scsi: <fdomain> INFO: use lspci -v to see list of PCI devices\n" );
+   printk( "scsi: <fdomain> TMC-3260 detect:"
+           " Using Vendor ID: 0x%x and Device ID: 0x%x\n",
+           PCI_VENDOR_ID_FD, 
+           PCI_DEVICE_ID_FD_36C70 );
+#endif 
+
+   if ((pdev = pci_find_device(PCI_VENDOR_ID_FD, PCI_DEVICE_ID_FD_36C70, pdev)) == NULL)
+                return 0;
+   if (pci_enable_device(pdev)) return 0;
+       
+#if DEBUG_DETECT
+   printk( "scsi: <fdomain> TMC-3260 detect:"
+           " PCI bus %u, device %u, function %u\n",
+           pdev->bus->number,
+           PCI_SLOT(pdev->devfn),
+           PCI_FUNC(pdev->devfn));
+#endif
+
+   /* We now have the appropriate device function for the FD board so we
+      just read the PCI config info from the registers.  */
+
+   pci_base = pci_resource_start(pdev, 0);
+   pci_irq = pdev->irq;
+
+   if (!request_region( pci_base, 0x10, "fdomain" ))
+        return 0;
+
+   /* Now we have the I/O base address and interrupt from the PCI
+      configuration registers. */
+
+   *irq    = pci_irq;
+   *iobase = pci_base;
+   *ret_pdev = pdev;
+
+#if DEBUG_DETECT
+   printk( "scsi: <fdomain> TMC-3260 detect:"
+           " IRQ = %d, I/O base = 0x%x [0x%lx]\n", *irq, *iobase, pci_base );
+#endif
+
+   if (!fdomain_is_valid_port(pci_base)) {
+      printk(KERN_ERR "scsi: <fdomain> PCI card detected, but driver not loaded (invalid port)\n" );
+      release_region(pci_base, 0x10);
+      return 0;
+   }
+
+                                /* Fill in a few global variables.  Ugh. */
+   bios_major = bios_minor = -1;
+   PCI_bus    = 1;
+   Quantum    = 0;
+   bios_base  = 0;
+   
+   return 1;
+}
+#endif
+
+struct Scsi_Host *__fdomain_16x0_detect(struct scsi_host_template *tpnt )
+{
+   int              retcode;
+   struct Scsi_Host *shpnt;
+   struct pci_dev *pdev = NULL;
+
+   if (setup_called) {
+#if DEBUG_DETECT
+      printk( "scsi: <fdomain> No BIOS, using port_base = 0x%x, irq = %d\n",
+              port_base, interrupt_level );
+#endif
+      if (!request_region(port_base, 0x10, "fdomain")) {
+         printk( "scsi: <fdomain> port 0x%x is busy\n", port_base );
+         printk( "scsi: <fdomain> Bad LILO/INSMOD parameters?\n" );
+         return NULL;
+      }
+      if (!fdomain_is_valid_port( port_base )) {
+         printk( "scsi: <fdomain> Cannot locate chip at port base 0x%x\n",
+                 port_base );
+         printk( "scsi: <fdomain> Bad LILO/INSMOD parameters?\n" );
+         release_region(port_base, 0x10);
+         return NULL;
+      }
+   } else {
+      int flag = 0;
+
+#ifdef CONFIG_PCI
+                                /* Try PCI detection first */
+      flag = fdomain_pci_bios_detect( &interrupt_level, &port_base, &pdev );
+#endif
+      if (!flag) {
+                                /* Then try ISA bus detection */
+         flag = fdomain_isa_detect( &interrupt_level, &port_base );
+
+         if (!flag) {
+            printk( "scsi: <fdomain> Detection failed (no card)\n" );
+            return NULL;
+         }
+      }
+   }
+
+   fdomain_16x0_bus_reset(NULL);
+
+   if (fdomain_test_loopback()) {
+      printk(KERN_ERR  "scsi: <fdomain> Detection failed (loopback test failed at port base 0x%x)\n", port_base);
+      if (setup_called) {
+         printk(KERN_ERR "scsi: <fdomain> Bad LILO/INSMOD parameters?\n");
+      }
+      release_region(port_base, 0x10);
+      return NULL;
+   }
+
+   if (this_id) {
+      tpnt->this_id = (this_id & 0x07);
+      adapter_mask  = (1 << tpnt->this_id);
+   } else {
+      if (PCI_bus || (bios_major == 3 && bios_minor >= 2) || bios_major < 0) {
+         tpnt->this_id = 7;
+         adapter_mask  = 0x80;
+      } else {
+         tpnt->this_id = 6;
+         adapter_mask  = 0x40;
+      }
+   }
+
+/* Print out a banner here in case we can't
+   get resources.  */
+
+   shpnt = scsi_register( tpnt, 0 );
+   if(shpnt == NULL) {
+        release_region(port_base, 0x10);
+        return NULL;
+   }
+   shpnt->irq = interrupt_level;
+   shpnt->io_port = port_base;
+   scsi_set_device(shpnt, &pdev->dev);
+   shpnt->n_io_port = 0x10;
+   print_banner( shpnt );
+
+   /* Log IRQ with kernel */   
+   if (!interrupt_level) {
+      printk(KERN_ERR "scsi: <fdomain> Card Detected, but driver not loaded (no IRQ)\n" );
+      release_region(port_base, 0x10);
+      return NULL;
+   } else {
+      /* Register the IRQ with the kernel */
+
+      retcode = request_irq( interrupt_level,
+                             do_fdomain_16x0_intr, pdev?SA_SHIRQ:0, "fdomain", shpnt);
+
+      if (retcode < 0) {
+         if (retcode == -EINVAL) {
+            printk(KERN_ERR "scsi: <fdomain> IRQ %d is bad!\n", interrupt_level );
+            printk(KERN_ERR "                This shouldn't happen!\n" );
+            printk(KERN_ERR "                Send mail to faith@acm.org\n" );
+         } else if (retcode == -EBUSY) {
+            printk(KERN_ERR "scsi: <fdomain> IRQ %d is already in use!\n", interrupt_level );
+            printk(KERN_ERR "                Please use another IRQ!\n" );
+         } else {
+            printk(KERN_ERR "scsi: <fdomain> Error getting IRQ %d\n", interrupt_level );
+            printk(KERN_ERR "                This shouldn't happen!\n" );
+            printk(KERN_ERR "                Send mail to faith@acm.org\n" );
+         }
+         printk(KERN_ERR "scsi: <fdomain> Detected, but driver not loaded (IRQ)\n" );
+         release_region(port_base, 0x10);
+         return NULL;
+      }
+   }
+   return shpnt;
+}
+
+static int fdomain_16x0_detect(struct scsi_host_template *tpnt)
+{
+        if (fdomain)
+                fdomain_setup(fdomain);
+        return (__fdomain_16x0_detect(tpnt) != NULL);
+}
+
+static const char *fdomain_16x0_info( struct Scsi_Host *ignore )
+{
+   static char buffer[128];
+   char        *pt;
+   
+   strcpy( buffer, "Future Domain 16-bit SCSI Driver Version" );
+   if (strchr( VERSION, ':')) { /* Assume VERSION is an RCS Revision string */
+      strcat( buffer, strchr( VERSION, ':' ) + 1 );
+      pt = strrchr( buffer, '$') - 1;
+      if (!pt)                  /* Stripped RCS Revision string? */
+            pt = buffer + strlen( buffer ) - 1;
+      if (*pt != ' ')
+            ++pt;
+      *pt = '\0';
+   } else {                     /* Assume VERSION is a number */
+      strcat( buffer, " " VERSION );
+   }
+      
+   return buffer;
+}
+
+#if 0
+static int fdomain_arbitrate( void )
+{
+   int           status = 0;
+   unsigned long timeout;
+
+#if EVERY_ACCESS
+   printk( "fdomain_arbitrate()\n" );
+#endif
+   
+   outb(0x00, port_base + SCSI_Cntl);              /* Disable data drivers */
+   outb(adapter_mask, port_base + SCSI_Data_NoACK); /* Set our id bit */
+   outb(0x04 | PARITY_MASK, port_base + TMC_Cntl); /* Start arbitration */
+
+   timeout = 500;
+   do {
+      status = inb(port_base + TMC_Status);        /* Read adapter status */
+      if (status & 0x02)                      /* Arbitration complete */
+            return 0;
+      mdelay(1);                        /* Wait one millisecond */
+   } while (--timeout);
+
+   /* Make bus idle */
+   fdomain_make_bus_idle();
+
+#if EVERY_ACCESS
+   printk( "Arbitration failed, status = %x\n", status );
+#endif
+#if ERRORS_ONLY
+   printk( "scsi: <fdomain> Arbitration failed, status = %x\n", status );
+#endif
+   return 1;
+}
+#endif
+
+static int fdomain_select( int target )
+{
+   int           status;
+   unsigned long timeout;
+#if ERRORS_ONLY
+   static int    flag = 0;
+#endif
+
+   outb(0x82, port_base + SCSI_Cntl); /* Bus Enable + Select */
+   outb(adapter_mask | (1 << target), port_base + SCSI_Data_NoACK);
+
+   /* Stop arbitration and enable parity */
+   outb(PARITY_MASK, port_base + TMC_Cntl); 
+
+   timeout = 350;                       /* 350 msec */
+
+   do {
+      status = inb(port_base + SCSI_Status); /* Read adapter status */
+      if (status & 1) {                 /* Busy asserted */
+         /* Enable SCSI Bus (on error, should make bus idle with 0) */
+         outb(0x80, port_base + SCSI_Cntl);
+         return 0;
+      }
+      mdelay(1);                        /* wait one msec */
+   } while (--timeout);
+   /* Make bus idle */
+   fdomain_make_bus_idle();
+#if EVERY_ACCESS
+   if (!target) printk( "Selection failed\n" );
+#endif
+#if ERRORS_ONLY
+   if (!target) {
+      if (!flag) /* Skip first failure for all chips. */
+            ++flag;
+      else
+            printk( "scsi: <fdomain> Selection failed\n" );
+   }
+#endif
+   return 1;
+}
+
+static void my_done(int error)
+{
+   if (in_command) {
+      in_command = 0;
+      outb(0x00, port_base + Interrupt_Cntl);
+      fdomain_make_bus_idle();
+      current_SC->result = error;
+      if (current_SC->scsi_done)
+            current_SC->scsi_done( current_SC );
+      else panic( "scsi: <fdomain> current_SC->scsi_done() == NULL" );
+   } else {
+      panic( "scsi: <fdomain> my_done() called outside of command\n" );
+   }
+#if DEBUG_RACE
+   in_interrupt_flag = 0;
+#endif
+}
+
+static irqreturn_t do_fdomain_16x0_intr(int irq, void *dev_id,
+                                        struct pt_regs * regs )
+{
+   unsigned long flags;
+   int      status;
+   int      done = 0;
+   unsigned data_count;
+
+                                /* The fdomain_16x0_intr is only called via
+                                   the interrupt handler.  The goal of the
+                                   sti() here is to allow other
+                                   interruptions while this routine is
+                                   running. */
+
+   /* Check for other IRQ sources */
+   if ((inb(port_base + TMC_Status) & 0x01) == 0)
+        return IRQ_NONE;
+
+   /* It is our IRQ */          
+   outb(0x00, port_base + Interrupt_Cntl);
+
+   /* We usually have one spurious interrupt after each command.  Ignore it. */
+   if (!in_command || !current_SC) {    /* Spurious interrupt */
+#if EVERY_ACCESS
+      printk( "Spurious interrupt, in_command = %d, current_SC = %x\n",
+              in_command, current_SC );
+#endif
+      return IRQ_NONE;
+   }
+
+   /* Abort calls my_done, so we do nothing here. */
+   if (current_SC->SCp.phase & aborted) {
+#if DEBUG_ABORT
+      printk( "scsi: <fdomain> Interrupt after abort, ignoring\n" );
+#endif
+      /*
+      return IRQ_HANDLED; */
+   }
+
+#if DEBUG_RACE
+   ++in_interrupt_flag;
+#endif
+
+   if (current_SC->SCp.phase & in_arbitration) {
+      status = inb(port_base + TMC_Status);        /* Read adapter status */
+      if (!(status & 0x02)) {
+#if EVERY_ACCESS
+         printk( " AFAIL " );
+#endif
+         spin_lock_irqsave(current_SC->device->host->host_lock, flags);
+         my_done( DID_BUS_BUSY << 16 );
+         spin_unlock_irqrestore(current_SC->device->host->host_lock, flags);
+         return IRQ_HANDLED;
+      }
+      current_SC->SCp.phase = in_selection;
+      
+      outb(0x40 | FIFO_COUNT, port_base + Interrupt_Cntl);
+
+      outb(0x82, port_base + SCSI_Cntl); /* Bus Enable + Select */
+      outb(adapter_mask | (1 << current_SC->device->id), port_base + SCSI_Data_NoACK);
+      
+      /* Stop arbitration and enable parity */
+      outb(0x10 | PARITY_MASK, port_base + TMC_Cntl);
+#if DEBUG_RACE
+      in_interrupt_flag = 0;
+#endif
+      return IRQ_HANDLED;
+   } else if (current_SC->SCp.phase & in_selection) {
+      status = inb(port_base + SCSI_Status);
+      if (!(status & 0x01)) {
+         /* Try again, for slow devices */
+         if (fdomain_select( current_SC->device->id )) {
+#if EVERY_ACCESS
+            printk( " SFAIL " );
+#endif
+            spin_lock_irqsave(current_SC->device->host->host_lock, flags);
+            my_done( DID_NO_CONNECT << 16 );
+            spin_unlock_irqrestore(current_SC->device->host->host_lock, flags);
+            return IRQ_HANDLED;
+         } else {
+#if EVERY_ACCESS
+            printk( " AltSel " );
+#endif
+            /* Stop arbitration and enable parity */
+            outb(0x10 | PARITY_MASK, port_base + TMC_Cntl);
+         }
+      }
+      current_SC->SCp.phase = in_other;
+      outb(0x90 | FIFO_COUNT, port_base + Interrupt_Cntl);
+      outb(0x80, port_base + SCSI_Cntl);
+#if DEBUG_RACE
+      in_interrupt_flag = 0;
+#endif
+      return IRQ_HANDLED;
+   }
+   
+   /* current_SC->SCp.phase == in_other: this is the body of the routine */
+   
+   status = inb(port_base + SCSI_Status);
+   
+   if (status & 0x10) { /* REQ */
+      
+      switch (status & 0x0e) {
+       
+      case 0x08:                /* COMMAND OUT */
+         outb(current_SC->cmnd[current_SC->SCp.sent_command++],
+              port_base + Write_SCSI_Data);
+#if EVERY_ACCESS
+         printk( "CMD = %x,",
+                 current_SC->cmnd[ current_SC->SCp.sent_command - 1] );
+#endif
+         break;
+      case 0x00:                /* DATA OUT -- tmc18c50/tmc18c30 only */
+         if (chip != tmc1800 && !current_SC->SCp.have_data_in) {
+            current_SC->SCp.have_data_in = -1;
+            outb(0xd0 | PARITY_MASK, port_base + TMC_Cntl);
+         }
+         break;
+      case 0x04:                /* DATA IN -- tmc18c50/tmc18c30 only */
+         if (chip != tmc1800 && !current_SC->SCp.have_data_in) {
+            current_SC->SCp.have_data_in = 1;
+            outb(0x90 | PARITY_MASK, port_base + TMC_Cntl);
+         }
+         break;
+      case 0x0c:                /* STATUS IN */
+         current_SC->SCp.Status = inb(port_base + Read_SCSI_Data);
+#if EVERY_ACCESS
+         printk( "Status = %x, ", current_SC->SCp.Status );
+#endif
+#if ERRORS_ONLY
+         if (current_SC->SCp.Status
+             && current_SC->SCp.Status != 2
+             && current_SC->SCp.Status != 8) {
+            printk( "scsi: <fdomain> target = %d, command = %x, status = %x\n",
+                    current_SC->device->id,
+                    current_SC->cmnd[0],
+                    current_SC->SCp.Status );
+         }
+#endif
+               break;
+      case 0x0a:                /* MESSAGE OUT */
+         outb(MESSAGE_REJECT, port_base + Write_SCSI_Data); /* Reject */
+         break;
+      case 0x0e:                /* MESSAGE IN */
+         current_SC->SCp.Message = inb(port_base + Read_SCSI_Data);
+#if EVERY_ACCESS
+         printk( "Message = %x, ", current_SC->SCp.Message );
+#endif
+         if (!current_SC->SCp.Message) ++done;
+#if DEBUG_MESSAGES || EVERY_ACCESS
+         if (current_SC->SCp.Message) {
+            printk( "scsi: <fdomain> message = %x\n",
+                    current_SC->SCp.Message );
+         }
+#endif
+         break;
+      }
+   }
+
+   if (chip == tmc1800 && !current_SC->SCp.have_data_in
+       && (current_SC->SCp.sent_command >= current_SC->cmd_len)) {
+      
+      if(current_SC->sc_data_direction == DMA_TO_DEVICE)
+      {
+         current_SC->SCp.have_data_in = -1;
+         outb(0xd0 | PARITY_MASK, port_base + TMC_Cntl);
+      }
+      else
+      {
+         current_SC->SCp.have_data_in = 1;
+         outb(0x90 | PARITY_MASK, port_base + TMC_Cntl);
+      }
+   }
+
+   if (current_SC->SCp.have_data_in == -1) { /* DATA OUT */
+      while ((data_count = FIFO_Size - inw(port_base + FIFO_Data_Count)) > 512) {
+#if EVERY_ACCESS
+         printk( "DC=%d, ", data_count ) ;
+#endif
+         if (data_count > current_SC->SCp.this_residual)
+               data_count = current_SC->SCp.this_residual;
+         if (data_count > 0) {
+#if EVERY_ACCESS
+            printk( "%d OUT, ", data_count );
+#endif
+            if (data_count == 1) {
+               outb(*current_SC->SCp.ptr++, port_base + Write_FIFO);
+               --current_SC->SCp.this_residual;
+            } else {
+               data_count >>= 1;
+               outsw(port_base + Write_FIFO, current_SC->SCp.ptr, data_count);
+               current_SC->SCp.ptr += 2 * data_count;
+               current_SC->SCp.this_residual -= 2 * data_count;
+            }
+         }
+         if (!current_SC->SCp.this_residual) {
+            if (current_SC->SCp.buffers_residual) {
+               --current_SC->SCp.buffers_residual;
+               ++current_SC->SCp.buffer;
+               current_SC->SCp.ptr = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
+               current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
+            } else
+                  break;
+         }
+      }
+   }
+   
+   if (current_SC->SCp.have_data_in == 1) { /* DATA IN */
+      while ((data_count = inw(port_base + FIFO_Data_Count)) > 0) {
+#if EVERY_ACCESS
+         printk( "DC=%d, ", data_count );
+#endif
+         if (data_count > current_SC->SCp.this_residual)
+               data_count = current_SC->SCp.this_residual;
+         if (data_count) {
+#if EVERY_ACCESS
+            printk( "%d IN, ", data_count );
+#endif
+            if (data_count == 1) {
+               *current_SC->SCp.ptr++ = inb(port_base + Read_FIFO);
+               --current_SC->SCp.this_residual;
+            } else {
+               data_count >>= 1; /* Number of words */
+               insw(port_base + Read_FIFO, current_SC->SCp.ptr, data_count);
+               current_SC->SCp.ptr += 2 * data_count;
+               current_SC->SCp.this_residual -= 2 * data_count;
+            }
+         }
+         if (!current_SC->SCp.this_residual
+             && current_SC->SCp.buffers_residual) {
+            --current_SC->SCp.buffers_residual;
+            ++current_SC->SCp.buffer;
+            current_SC->SCp.ptr = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
+            current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
+         }
+      }
+   }
+   
+   if (done) {
+#if EVERY_ACCESS
+      printk( " ** IN DONE %d ** ", current_SC->SCp.have_data_in );
+#endif
+
+#if ERRORS_ONLY
+      if (current_SC->cmnd[0] == REQUEST_SENSE && !current_SC->SCp.Status) {
+         if ((unsigned char)(*((char *)current_SC->request_buffer+2)) & 0x0f) {
+            unsigned char key;
+            unsigned char code;
+            unsigned char qualifier;
+
+            key = (unsigned char)(*((char *)current_SC->request_buffer + 2))
+                  & 0x0f;
+            code = (unsigned char)(*((char *)current_SC->request_buffer + 12));
+            qualifier = (unsigned char)(*((char *)current_SC->request_buffer
+                                          + 13));
+
+            if (key != UNIT_ATTENTION
+                && !(key == NOT_READY
+                     && code == 0x04
+                     && (!qualifier || qualifier == 0x02 || qualifier == 0x01))
+                && !(key == ILLEGAL_REQUEST && (code == 0x25
+                                                || code == 0x24
+                                                || !code)))
+                  
+                  printk( "scsi: <fdomain> REQUEST SENSE"
+                          " Key = %x, Code = %x, Qualifier = %x\n",
+                          key, code, qualifier );
+         }
+      }
+#endif
+#if EVERY_ACCESS
+      printk( "BEFORE MY_DONE. . ." );
+#endif
+      spin_lock_irqsave(current_SC->device->host->host_lock, flags);
+      my_done( (current_SC->SCp.Status & 0xff)
+               | ((current_SC->SCp.Message & 0xff) << 8) | (DID_OK << 16) );
+      spin_unlock_irqrestore(current_SC->device->host->host_lock, flags);
+#if EVERY_ACCESS
+      printk( "RETURNING.\n" );
+#endif
+      
+   } else {
+      if (current_SC->SCp.phase & disconnect) {
+         outb(0xd0 | FIFO_COUNT, port_base + Interrupt_Cntl);
+         outb(0x00, port_base + SCSI_Cntl);
+      } else {
+         outb(0x90 | FIFO_COUNT, port_base + Interrupt_Cntl);
+      }
+   }
+#if DEBUG_RACE
+   in_interrupt_flag = 0;
+#endif
+   return IRQ_HANDLED;
+}
+
+static int fdomain_16x0_queue(struct scsi_cmnd *SCpnt,
+                void (*done)(struct scsi_cmnd *))
+{
+   if (in_command) {
+      panic( "scsi: <fdomain> fdomain_16x0_queue() NOT REENTRANT!\n" );
+   }
+#if EVERY_ACCESS
+   printk( "queue: target = %d cmnd = 0x%02x pieces = %d size = %u\n",
+           SCpnt->target,
+           *(unsigned char *)SCpnt->cmnd,
+           SCpnt->use_sg,
+           SCpnt->request_bufflen );
+#endif
+
+   fdomain_make_bus_idle();
+
+   current_SC            = SCpnt; /* Save this for the done function */
+   current_SC->scsi_done = done;
+
+   /* Initialize static data */
+
+   if (current_SC->use_sg) {
+      current_SC->SCp.buffer =
+            (struct scatterlist *)current_SC->request_buffer;
+      current_SC->SCp.ptr              = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
+      current_SC->SCp.this_residual    = current_SC->SCp.buffer->length;
+      current_SC->SCp.buffers_residual = current_SC->use_sg - 1;
+   } else {
+      current_SC->SCp.ptr              = (char *)current_SC->request_buffer;
+      current_SC->SCp.this_residual    = current_SC->request_bufflen;
+      current_SC->SCp.buffer           = NULL;
+      current_SC->SCp.buffers_residual = 0;
+   }
+         
+   
+   current_SC->SCp.Status              = 0;
+   current_SC->SCp.Message             = 0;
+   current_SC->SCp.have_data_in        = 0;
+   current_SC->SCp.sent_command        = 0;
+   current_SC->SCp.phase               = in_arbitration;
+
+   /* Start arbitration */
+   outb(0x00, port_base + Interrupt_Cntl);
+   outb(0x00, port_base + SCSI_Cntl);              /* Disable data drivers */
+   outb(adapter_mask, port_base + SCSI_Data_NoACK); /* Set our id bit */
+   ++in_command;
+   outb(0x20, port_base + Interrupt_Cntl);
+   outb(0x14 | PARITY_MASK, port_base + TMC_Cntl); /* Start arbitration */
+
+   return 0;
+}
+
+#if DEBUG_ABORT
+static void print_info(struct scsi_cmnd *SCpnt)
+{
+   unsigned int imr;
+   unsigned int irr;
+   unsigned int isr;
+
+   if (!SCpnt || !SCpnt->device || !SCpnt->device->host) {
+      printk(KERN_WARNING "scsi: <fdomain> Cannot provide detailed information\n");
+      return;
+   }
+   
+   printk(KERN_INFO "%s\n", fdomain_16x0_info( SCpnt->device->host ) );
+   print_banner(SCpnt->device->host);
+   switch (SCpnt->SCp.phase) {
+   case in_arbitration: printk("arbitration"); break;
+   case in_selection:   printk("selection");   break;
+   case in_other:       printk("other");       break;
+   default:             printk("unknown");     break;
+   }
+
+   printk( " (%d), target = %d cmnd = 0x%02x pieces = %d size = %u\n",
+           SCpnt->SCp.phase,
+           SCpnt->device->id,
+           *(unsigned char *)SCpnt->cmnd,
+           SCpnt->use_sg,
+           SCpnt->request_bufflen );
+   printk( "sent_command = %d, have_data_in = %d, timeout = %d\n",
+           SCpnt->SCp.sent_command,
+           SCpnt->SCp.have_data_in,
+           SCpnt->timeout );
+#if DEBUG_RACE
+   printk( "in_interrupt_flag = %d\n", in_interrupt_flag );
+#endif
+
+   imr = (inb( 0x0a1 ) << 8) + inb( 0x21 );
+   outb( 0x0a, 0xa0 );
+   irr = inb( 0xa0 ) << 8;
+   outb( 0x0a, 0x20 );
+   irr += inb( 0x20 );
+   outb( 0x0b, 0xa0 );
+   isr = inb( 0xa0 ) << 8;
+   outb( 0x0b, 0x20 );
+   isr += inb( 0x20 );
+
+                                /* Print out interesting information */
+   printk( "IMR = 0x%04x", imr );
+   if (imr & (1 << interrupt_level))
+         printk( " (masked)" );
+   printk( ", IRR = 0x%04x, ISR = 0x%04x\n", irr, isr );
+
+   printk( "SCSI Status      = 0x%02x\n", inb(port_base + SCSI_Status));
+   printk( "TMC Status       = 0x%02x", inb(port_base + TMC_Status));
+   if (inb((port_base + TMC_Status) & 1))
+         printk( " (interrupt)" );
+   printk( "\n" );
+   printk("Interrupt Status = 0x%02x", inb(port_base + Interrupt_Status));
+   if (inb(port_base + Interrupt_Status) & 0x08)
+         printk( " (enabled)" );
+   printk( "\n" );
+   if (chip == tmc18c50 || chip == tmc18c30) {
+      printk("FIFO Status      = 0x%02x\n", inb(port_base + FIFO_Status));
+      printk( "Int. Condition   = 0x%02x\n",
+              inb( port_base + Interrupt_Cond ) );
+   }
+   printk( "Configuration 1  = 0x%02x\n", inb( port_base + Configuration1 ) );
+   if (chip == tmc18c50 || chip == tmc18c30)
+         printk( "Configuration 2  = 0x%02x\n",
+                 inb( port_base + Configuration2 ) );
+}
+#endif
+
+static int fdomain_16x0_abort(struct scsi_cmnd *SCpnt)
+{
+#if EVERY_ACCESS || ERRORS_ONLY || DEBUG_ABORT
+   printk( "scsi: <fdomain> abort " );
+#endif
+
+   if (!in_command) {
+#if EVERY_ACCESS || ERRORS_ONLY
+      printk( " (not in command)\n" );
+#endif
+      return FAILED;
+   } else printk( "\n" );
+
+#if DEBUG_ABORT
+   print_info( SCpnt );
+#endif
+
+   fdomain_make_bus_idle();
+   current_SC->SCp.phase |= aborted;
+   current_SC->result = DID_ABORT << 16;
+   
+   /* Aborts are not done well. . . */
+   my_done(DID_ABORT << 16);
+   return SUCCESS;
+}
+
+int fdomain_16x0_bus_reset(struct scsi_cmnd *SCpnt)
+{
+   outb(1, port_base + SCSI_Cntl);
+   do_pause( 2 );
+   outb(0, port_base + SCSI_Cntl);
+   do_pause( 115 );
+   outb(0, port_base + SCSI_Mode_Cntl);
+   outb(PARITY_MASK, port_base + TMC_Cntl);
+   return SUCCESS;
+}
+
+static int fdomain_16x0_biosparam(struct scsi_device *sdev,
+                struct block_device *bdev,
+                sector_t capacity, int *info_array)
+{
+   int              drive;
+   int              size      = capacity;
+   unsigned long    offset;
+   struct drive_info {
+      unsigned short cylinders;
+      unsigned char  heads;
+      unsigned char  sectors;
+   } i;
+   
+   /* NOTES:
+      The RAM area starts at 0x1f00 from the bios_base address.
+
+      For BIOS Version 2.0:
+      
+      The drive parameter table seems to start at 0x1f30.
+      The first byte's purpose is not known.
+      Next is the cylinder, head, and sector information.
+      The last 4 bytes appear to be the drive's size in sectors.
+      The other bytes in the drive parameter table are unknown.
+      If anyone figures them out, please send me mail, and I will
+      update these notes.
+
+      Tape drives do not get placed in this table.
+
+      There is another table at 0x1fea:
+      If the byte is 0x01, then the SCSI ID is not in use.
+      If the byte is 0x18 or 0x48, then the SCSI ID is in use,
+      although tapes don't seem to be in this table.  I haven't
+      seen any other numbers (in a limited sample).
+
+      0x1f2d is a drive count (i.e., not including tapes)
+
+      The table at 0x1fcc are I/O ports addresses for the various
+      operations.  I calculate these by hand in this driver code.
+
+      
+      
+      For the ISA-200S version of BIOS Version 2.0:
+
+      The drive parameter table starts at 0x1f33.
+
+      WARNING: Assume that the table entry is 25 bytes long.  Someone needs
+      to check this for the Quantum ISA-200S card.
+
+      
+      
+      For BIOS Version 3.2:
+
+      The drive parameter table starts at 0x1f70.  Each entry is
+      0x0a bytes long.  Heads are one less than we need to report.
+    */
+
+   if (MAJOR(bdev->bd_dev) != SCSI_DISK0_MAJOR) {
+      printk("scsi: <fdomain> fdomain_16x0_biosparam: too many disks");
+      return 0;
+   }
+   drive = MINOR(bdev->bd_dev) >> 4;
+
+   if (bios_major == 2) {
+      switch (Quantum) {
+      case 2:                   /* ISA_200S */
+                                /* The value of 25 has never been verified.
+                                   It should probably be 15. */
+         offset = 0x1f33 + drive * 25;
+         break;
+      case 3:                   /* ISA_250MG */
+         offset = 0x1f36 + drive * 15;
+         break;
+      case 4:                   /* ISA_200S (another one) */
+         offset = 0x1f34 + drive * 15;
+         break;
+      default:
+         offset = 0x1f31 + drive * 25;
+         break;
+      }
+      memcpy_fromio( &i, bios_mem + offset, sizeof( struct drive_info ) );
+      info_array[0] = i.heads;
+      info_array[1] = i.sectors;
+      info_array[2] = i.cylinders;
+   } else if (bios_major == 3
+              && bios_minor >= 0
+              && bios_minor < 4) { /* 3.0 and 3.2 BIOS */
+      memcpy_fromio( &i, bios_mem + 0x1f71 + drive * 10,
+                     sizeof( struct drive_info ) );
+      info_array[0] = i.heads + 1;
+      info_array[1] = i.sectors;
+      info_array[2] = i.cylinders;
+   } else {                     /* 3.4 BIOS (and up?) */
+      /* This algorithm was provided by Future Domain (much thanks!). */
+      unsigned char *p = scsi_bios_ptable(bdev);
+
+      if (p && p[65] == 0xaa && p[64] == 0x55 /* Partition table valid */
+          && p[4]) {                        /* Partition type */
+
+         /* The partition table layout is as follows:
+
+            Start: 0x1b3h
+            Offset: 0 = partition status
+                    1 = starting head
+                    2 = starting sector and cylinder (word, encoded)
+                    4 = partition type
+                    5 = ending head
+                    6 = ending sector and cylinder (word, encoded)
+                    8 = starting absolute sector (double word)
+                    c = number of sectors (double word)
+            Signature: 0x1fe = 0x55aa
+
+            So, this algorithm assumes:
+            1) the first partition table is in use,
+            2) the data in the first entry is correct, and
+            3) partitions never divide cylinders
+
+            Note that (1) may be FALSE for NetBSD (and other BSD flavors),
+            as well as for Linux.  Note also, that Linux doesn't pay any
+            attention to the fields that are used by this algorithm -- it
+            only uses the absolute sector data.  Recent versions of Linux's
+            fdisk(1) will fill this data in correctly, and forthcoming
+            versions will check for consistency.
+
+            Checking for a non-zero partition type is not part of the
+            Future Domain algorithm, but it seemed to be a reasonable thing
+            to do, especially in the Linux and BSD worlds. */
+
+         info_array[0] = p[5] + 1;          /* heads */
+         info_array[1] = p[6] & 0x3f;       /* sectors */
+      } else {
+
+         /* Note that this new method guarantees that there will always be
+            less than 1024 cylinders on a platter.  This is good for drives
+            up to approximately 7.85GB (where 1GB = 1024 * 1024 kB). */
+
+         if ((unsigned int)size >= 0x7e0000U) {
+            info_array[0] = 0xff; /* heads   = 255 */
+            info_array[1] = 0x3f; /* sectors =  63 */
+         } else if ((unsigned int)size >= 0x200000U) {
+            info_array[0] = 0x80; /* heads   = 128 */
+            info_array[1] = 0x3f; /* sectors =  63 */
+         } else {
+            info_array[0] = 0x40; /* heads   =  64 */
+            info_array[1] = 0x20; /* sectors =  32 */
+         }
+      }
+                                /* For both methods, compute the cylinders */
+      info_array[2] = (unsigned int)size / (info_array[0] * info_array[1] );
+      kfree(p);
+   }
+   
+   return 0;
+}
+
+static int fdomain_16x0_release(struct Scsi_Host *shpnt)
+{
+        if (shpnt->irq)
+                free_irq(shpnt->irq, shpnt);
+        if (shpnt->io_port && shpnt->n_io_port)
+                release_region(shpnt->io_port, shpnt->n_io_port);
+        return 0;
+}
+
+struct scsi_host_template fdomain_driver_template = {
+        .module                 = THIS_MODULE,
+        .name                   = "fdomain",
+        .proc_name              = "fdomain",
+        .detect                 = fdomain_16x0_detect,
+        .info                   = fdomain_16x0_info,
+        .queuecommand           = fdomain_16x0_queue,
+        .eh_abort_handler       = fdomain_16x0_abort,
+        .eh_bus_reset_handler   = fdomain_16x0_bus_reset,
+        .bios_param             = fdomain_16x0_biosparam,
+        .release                = fdomain_16x0_release,
+        .can_queue              = 1,
+        .this_id                = 6,
+        .sg_tablesize           = 64,
+        .cmd_per_lun            = 1,
+        .use_clustering         = DISABLE_CLUSTERING,
+};
+
+#ifndef PCMCIA
+#define driver_template fdomain_driver_template
+#include "scsi_module.c"
+#endif