Linux-2.6.12-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;
+}