Import 2.3.18pre1

[davej-history.git] / drivers / scsi / fdomain.c

/* 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)

 * 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 then 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.

 DO_DETECT: This activates some old scan code which was needed before the
 high level drivers got fixed. If you are having trouble with the driver,
 turning this on should not hurt, and might help. Please let me know if
 this is the case, since this code will be removed from future drivers.

 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.

 **************************************************************************/

#ifdef PCMCIA
#define MODULE
#endif

#ifdef MODULE
#include <linux/module.h>
#endif

#ifdef PCMCIA
#undef MODULE
#endif

#include <linux/sched.h>
#include <asm/io.h>
#include <linux/blk.h>
#include"scsi.h"
#include"hosts.h"
#include"fdomain.h"
#include <asm/system.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 <linux/config.h>/* for CONFIG_PCI */

struct proc_dir_entry proc_scsi_fdomain = {
 PROC_SCSI_FDOMAIN,7,"fdomain",
 S_IFDIR | S_IRUGO | S_IXUGO,2
};

#define VERSION"$Revision: 5.50 $"

/* START OF USER DEFINABLE OPTIONS */

#define DEBUG 1/* Enable debugging output */
#define ENABLE_PARITY 1/* Enable SCSI Parity */
#define FIFO_COUNT 2/* Number of 512 byte blocks before INTR */
#define DO_DETECT 0/* Do device detection here (see scsi.c) */

/* 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
};

static int port_base =0;
static unsigned long bios_base =0;
static int bios_major =0;
static int bios_minor =0;
static int PCI_bus =0;
static int Quantum =0;/* Quantum board variant */
static int interrupt_level =0;
staticvolatileint in_command =0;
static Scsi_Cmnd *current_SC = NULL;
static enum chip_type chip = unknown;
static int adapter_mask =0;
static int this_id =0;
static int setup_called =0;

#if DEBUG_RACE
staticvolatileint in_interrupt_flag =0;
#endif

static int SCSI_Mode_Cntl_port;
static int FIFO_Data_Count_port;
static int Interrupt_Cntl_port;
static int Interrupt_Status_port;
static int Read_FIFO_port;
static int Read_SCSI_Data_port;
static int SCSI_Cntl_port;
static int SCSI_Data_NoACK_port;
static int SCSI_Status_port;
static int TMC_Cntl_port;
static int TMC_Status_port;
static int Write_FIFO_port;
static int Write_SCSI_Data_port;

static int FIFO_Size =0x2000;/* 8k FIFO for
 pre-tmc18c30 chips */

externvoiddo_fdomain_16x0_intr(int irq,void*dev_id,
struct pt_regs * regs );

#ifdef MODULE
/* Allow insmod parameters to be like LILO
 parameters. For example:
 insmod fdomain fdomain=0x140,11
 */
static int fdomain[]={0,0,0};
MODULE_PARM(fdomain,"2-3i");
#endif

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.)

*/

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 voidprint_banner(struct Scsi_Host *shpnt )
{
if(!shpnt)return;/* This won't ever happen */

if(bios_major <0&& bios_minor <0) {
printk("scsi%d: <fdomain> No BIOS; using scsi id %d\n",
 shpnt->host_no, shpnt->this_id );
}else{
printk("scsi%d: <fdomain> BIOS version ", shpnt->host_no );

if(bios_major >=0)printk("%d.", bios_major );
elseprintk("?.");

if(bios_minor >=0)printk("%d", bios_minor );
elseprintk("?.");

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("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 );
elseprintk("<none>");

printk("\n");
}

voidfdomain_setup(char*str,int*ints )
{
if(setup_called++ || ints[0] <2|| ints[0] >3) {
printk("scsi: <fdomain>"
" Usage: fdomain=<PORT_BASE>,<IRQ>[,<ADAPTER_ID>]\n");
printk("scsi: <fdomain> Bad LILO/INSMOD parameters?\n");
}

 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 */
}


static voiddo_pause(unsigned amount )/* Pause for amount*10 milliseconds */
{
do{
udelay(10*1000);
}while(--amount);
}

inlinestatic voidfdomain_make_bus_idle(void)
{
outb(0, SCSI_Cntl_port );
outb(0, SCSI_Mode_Cntl_port );
if(chip == tmc18c50 || chip == tmc18c30)
outb(0x21| PARITY_MASK, TMC_Cntl_port );/* Clear forced intr. */
else
outb(0x01| PARITY_MASK, TMC_Cntl_port );
}

static intfdomain_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)return0;
if(inb( port + MSB_ID_Code ) !=0x61)return0;
 chip = tmc1800;
}else{/* test for 0xe960 id */
if(inb( port + MSB_ID_Code ) !=0x60)return0;
 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. */
}

return1;
}

static intfdomain_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)
return1;
}
return0;
}

/* 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 intfdomain_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)return0;

return ints[ (options &0x0e) >>1];
}

static intfdomain_isa_detect(int*irq,int*iobase )
{
int i, j;
int base;
int flag =0;

#if DEBUG_DETECT
printk("scsi: <fdomain> fdomain_isa_detect:");
#endif

for(i =0; !bios_base && i < ADDRESS_COUNT; i++) {
#if DEBUG_DETECT
printk(" %lx(%lx),", addresses[i], bios_base );
#endif
for(j =0; !bios_base && j < SIGNATURE_COUNT; j++) {
if(check_signature(addresses[i] + 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];
}
}
}

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) {
case2:/* ISA_200S */
case3:/* ISA_250MG */
 base =readb(bios_base +0x1fa2) + (readb(bios_base +0x1fa3) <<8);
break;
case4:/* ISA_200S (another one) */
 base =readb(bios_base +0x1fa3) + (readb(bios_base +0x1fa4) <<8);
break;
default:
 base =readb(bios_base +0x1fcc) + (readb(bios_base +0x1fcd) <<8);
break;
}

#if DEBUG_DETECT
printk(" %x,", base );
#endif

for(flag =0, i =0; !flag && i < PORT_COUNT; i++) {
if(base == ports[i])
++flag;
}

if(flag &&fdomain_is_valid_port( base )) {
*irq =fdomain_get_irq( base );
*iobase = base;
return1;
}

/* 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(check_region( base,0x10)) {
#if DEBUG_DETECT
printk(" (%x inuse),", base );
#endif
continue;
}
#if DEBUG_DETECT
printk(" %x,", base );
#endif
if((flag =fdomain_is_valid_port( base )))break;
}

#if DEBUG_DETECT
if(flag)printk(" SUCCESS\n");
elseprintk(" FAILURE\n");
#endif

if(!flag)return0;/* iobase not found */

*irq =fdomain_get_irq( base );
*iobase = base;

return1;/* success */
}

/* 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 intfdomain_pci_bios_detect(int*irq,int*iobase )
{
unsigned int pci_irq;/* PCI interrupt line */
unsigned long pci_base;/* PCI I/O base address */
struct pci_dev *pdev = NULL;

if(!pci_present())return0;

#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)
return0;

#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 = pdev->resource[0].start;
 pci_irq = pdev->irq;

/* Now we have the I/O base address and interrupt from the PCI
 configuration registers. */

*irq = pci_irq;
*iobase = pci_base;

#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( *iobase )) {
printk("scsi: <fdomain>"
" PCI card detected, but driver not loaded (invalid port)\n");
return0;
}

/* Fill in a few global variables. Ugh. */
 bios_major = bios_minor = -1;
 PCI_bus =1;
 Quantum =0;
 bios_base =0;

return1;
}
#endif

intfdomain_16x0_detect( Scsi_Host_Template *tpnt )
{
int retcode;
struct Scsi_Host *shpnt;
#if DO_DETECT
const int buflen =255;
 Scsi_Cmnd SCinit;
unsigned char do_inquiry[] = { INQUIRY,0,0,0, buflen,0};
unsigned char do_request_sense[] = { REQUEST_SENSE,0,0,0, buflen,0};
unsigned char do_read_capacity[] = { READ_CAPACITY,
0,0,0,0,0,0,0,0,0};
unsigned char buf[buflen];
#endif

 tpnt->proc_dir = &proc_scsi_fdomain;

#ifdef MODULE
if(fdomain[0] || fdomain[1] || fdomain[2]) {
 port_base = fdomain[0];
 interrupt_level = fdomain[1];
 this_id = fdomain[2];
 bios_major = bios_minor = -1;
++setup_called;
}
#endif

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(!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");
return0;
}
}else{
int flag =0;

#ifdef CONFIG_PCI
/* Try PCI detection first */
 flag =fdomain_pci_bios_detect( &interrupt_level, &port_base );
#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");
return0;
}
}
}

 SCSI_Mode_Cntl_port = port_base + SCSI_Mode_Cntl;
 FIFO_Data_Count_port = port_base + FIFO_Data_Count;
 Interrupt_Cntl_port = port_base + Interrupt_Cntl;
 Interrupt_Status_port = port_base + Interrupt_Status;
 Read_FIFO_port = port_base + Read_FIFO;
 Read_SCSI_Data_port = port_base + Read_SCSI_Data;
 SCSI_Cntl_port = port_base + SCSI_Cntl;
 SCSI_Data_NoACK_port = port_base + SCSI_Data_NoACK;
 SCSI_Status_port = port_base + SCSI_Status;
 TMC_Cntl_port = port_base + TMC_Cntl;
 TMC_Status_port = port_base + TMC_Status;
 Write_FIFO_port = port_base + Write_FIFO;
 Write_SCSI_Data_port = port_base + Write_SCSI_Data;

fdomain_16x0_reset( NULL,0);

if(fdomain_test_loopback()) {
printk("scsi: <fdomain> Detection failed"
" (loopback test failed at port base 0x%x)\n", port_base );
if(setup_called) {
printk("scsi: <fdomain> Bad LILO/INSMOD parameters?\n");
}
return0;
}

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);
 shpnt->irq = interrupt_level;
 shpnt->io_port = port_base;
 shpnt->n_io_port =0x10;
print_banner( shpnt );

/* Log IRQ with kernel */
if(!interrupt_level) {
printk("scsi: <fdomain>"
" Card Detected, but driver not loaded (no IRQ)\n");
return0;
}else{
/* Register the IRQ with the kernel */

 retcode =request_irq( interrupt_level,
 do_fdomain_16x0_intr,0,"fdomain", NULL);

if(retcode <0) {
if(retcode == -EINVAL) {
printk("scsi: <fdomain> IRQ %d is bad!\n", interrupt_level );
printk(" This shouldn't happen!\n");
printk(" Send mail to faith@acm.org\n");
}else if(retcode == -EBUSY) {
printk("scsi: <fdomain> IRQ %d is already in use!\n",
 interrupt_level );
printk(" Please use another IRQ!\n");
}else{
printk("scsi: <fdomain> Error getting IRQ %d\n",
 interrupt_level );
printk(" This shouldn't happen!\n");
printk(" Send mail to faith@acm.org\n");
}
printk("scsi: <fdomain> Detected, but driver not loaded (IRQ)\n");
return0;
}
}

/* Log I/O ports with kernel */
request_region( port_base,0x10,"fdomain");

#if DO_DETECT

/* These routines are here because of the way the SCSI bus behaves after
 a reset. This appropriate behavior was not handled correctly by the
 higher level SCSI routines when I first wrote this driver. Now,
 however, correct scan routines are part of scsi.c and these routines
 are no longer needed. However, this code is still good for
 debugging. */

 SCinit.request_buffer = SCinit.buffer = buf;
 SCinit.request_bufflen = SCinit.bufflen =sizeof(buf)-1;
 SCinit.use_sg =0;
 SCinit.lun =0;

printk("scsi: <fdomain> detection routine scanning for devices:\n");
for(i =0; i <8; i++) {
 SCinit.target = i;
if(i == tpnt->this_id)/* Skip host adapter */
continue;
memcpy(SCinit.cmnd, do_request_sense,sizeof(do_request_sense));
 retcode =fdomain_16x0_command(&SCinit);
if(!retcode) {
memcpy(SCinit.cmnd, do_inquiry,sizeof(do_inquiry));
 retcode =fdomain_16x0_command(&SCinit);
if(!retcode) {
printk(" SCSI ID %d: ", i );
for(j =8; j < (buf[4] <32? buf[4] :32); j++)
printk("%c", buf[j] >=20? buf[j] :' ');
memcpy(SCinit.cmnd, do_read_capacity,sizeof(do_read_capacity));
 retcode =fdomain_16x0_command(&SCinit);
if(!retcode) {
unsigned long blocks, size, capacity;

 blocks = (buf[0] <<24) | (buf[1] <<16)
| (buf[2] <<8) | buf[3];
 size = (buf[4] <<24) | (buf[5] <<16) | (buf[6] <<8) | buf[7];
 capacity = +( +(blocks /1024L) * +(size *10L)) /1024L;

printk("%lu MB (%lu byte blocks)",
((capacity +5L) /10L), size );
}else{
memcpy(SCinit.cmnd, do_request_sense,sizeof(do_request_sense));
 retcode =fdomain_16x0_command(&SCinit);
}
printk("\n");
}else{
memcpy(SCinit.cmnd, do_request_sense,sizeof(do_request_sense));
 retcode =fdomain_16x0_command(&SCinit);
}
}
}
#endif

return1;/* Maximum of one adapter will be detected. */
}

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;
}

/* First pass at /proc information routine. */
/*
 * inout : decides on the direction of the dataflow and the meaning of the 
 * variables
 * buffer: If inout==FALSE data is being written to it else read from it
 * *start: If inout==FALSE start of the valid data in the buffer
 * offset: If inout==FALSE offset from the beginning of the imaginary file 
 * from which we start writing into the buffer
 * length: If inout==FALSE max number of bytes to be written into the buffer 
 * else number of bytes in the buffer
 */
intfdomain_16x0_proc_info(char*buffer,char**start, off_t offset,
int length,int hostno,int inout )
{
const char*info =fdomain_16x0_info( NULL );
int len;
int pos;
int begin;

if(inout)return(-ENOSYS);

 begin =0;
strcpy( buffer, info );
strcat( buffer,"\n");

 pos = len =strlen( buffer );

if(pos < offset) {
 len =0;
 begin = pos;
}

*start = buffer + (offset - begin);/* Start of wanted data */
 len -= (offset - begin);
if(len > length) len = length;

return(len);
}

#if 0
static intfdomain_arbitrate(void)
{
int status =0;
unsigned long timeout;

#if EVERY_ACCESS
printk("fdomain_arbitrate()\n");
#endif

outb(0x00, SCSI_Cntl_port );/* Disable data drivers */
outb( adapter_mask, port_base + SCSI_Data_NoACK );/* Set our id bit */
outb(0x04| PARITY_MASK, TMC_Cntl_port );/* Start arbitration */

 timeout =500;
do{
 status =inb( TMC_Status_port );/* Read adapter status */
if(status &0x02)/* Arbitration complete */
return0;
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
return1;
}
#endif

static intfdomain_select(int target )
{
int status;
unsigned long timeout;
static int flag =0;


outb(0x82, SCSI_Cntl_port );/* Bus Enable + Select */
outb( adapter_mask | (1<< target), SCSI_Data_NoACK_port );

/* Stop arbitration and enable parity */
outb( PARITY_MASK, TMC_Cntl_port );

 timeout =350;/* 350 msec */

do{
 status =inb( SCSI_Status_port );/* Read adapter status */
if(status &1) {/* Busy asserted */
/* Enable SCSI Bus (on error, should make bus idle with 0) */
outb(0x80, SCSI_Cntl_port );
return0;
}
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
return1;
}

voidmy_done(int error )
{
if(in_command) {
 in_command =0;
outb(0x00, Interrupt_Cntl_port );
fdomain_make_bus_idle();
 current_SC->result = error;
if(current_SC->scsi_done)
 current_SC->scsi_done( current_SC );
elsepanic("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
}

voiddo_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. */

/* sti(); Yes, we really want sti() here if we want to lock up our machine */

outb(0x00, Interrupt_Cntl_port );

/* 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;
}

/* 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; */
}

#if DEBUG_RACE
++in_interrupt_flag;
#endif

if(current_SC->SCp.phase & in_arbitration) {
 status =inb( TMC_Status_port );/* Read adapter status */
if(!(status &0x02)) {
#if EVERY_ACCESS
printk(" AFAIL ");
#endif
spin_lock_irqsave(&io_request_lock, flags);
my_done( DID_BUS_BUSY <<16);
spin_unlock_irqrestore(&io_request_lock, flags);
return;
}
 current_SC->SCp.phase = in_selection;

outb(0x40| FIFO_COUNT, Interrupt_Cntl_port );

outb(0x82, SCSI_Cntl_port );/* Bus Enable + Select */
outb( adapter_mask | (1<< current_SC->target), SCSI_Data_NoACK_port );

/* Stop arbitration and enable parity */
outb(0x10| PARITY_MASK, TMC_Cntl_port );
#if DEBUG_RACE
 in_interrupt_flag =0;
#endif
return;
}else if(current_SC->SCp.phase & in_selection) {
 status =inb( SCSI_Status_port );
if(!(status &0x01)) {
/* Try again, for slow devices */
if(fdomain_select( current_SC->target )) {
#if EVERY_ACCESS
printk(" SFAIL ");
#endif
spin_lock_irqsave(&io_request_lock, flags);
my_done( DID_NO_CONNECT <<16);
spin_unlock_irqrestore(&io_request_lock, flags);
return;
}else{
#if EVERY_ACCESS
printk(" AltSel ");
#endif
/* Stop arbitration and enable parity */
outb(0x10| PARITY_MASK, TMC_Cntl_port );
}
}
 current_SC->SCp.phase = in_other;
outb(0x90| FIFO_COUNT, Interrupt_Cntl_port );
outb(0x80, SCSI_Cntl_port );
#if DEBUG_RACE
 in_interrupt_flag =0;
#endif
return;
}

/* current_SC->SCp.phase == in_other: this is the body of the routine */

 status =inb( SCSI_Status_port );

if(status &0x10) {/* REQ */

switch(status &0x0e) {

case0x08:/* COMMAND OUT */
outb( current_SC->cmnd[current_SC->SCp.sent_command++],
 Write_SCSI_Data_port );
#if EVERY_ACCESS
printk("CMD = %x,",
 current_SC->cmnd[ current_SC->SCp.sent_command -1] );
#endif
break;
case0x00:/* 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, TMC_Cntl_port );
}
break;
case0x04:/* 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, TMC_Cntl_port );
}
break;
case0x0c:/* STATUS IN */
 current_SC->SCp.Status =inb( Read_SCSI_Data_port );
#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->target,
 current_SC->cmnd[0],
 current_SC->SCp.Status );
}
#endif
break;
case0x0a:/* MESSAGE OUT */
outb( MESSAGE_REJECT, Write_SCSI_Data_port );/* Reject */
break;
case0x0e:/* MESSAGE IN */
 current_SC->SCp.Message =inb( Read_SCSI_Data_port );
#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)) {
/* We have to get the FIFO direction
 correct, so I've made a table based
 on the SCSI Standard of which commands
 appear to require a DATA OUT phase.
 */
/*
 p. 94: Command for all device types
 CHANGE DEFINITION 40 DATA OUT
 COMPARE 39 DATA OUT
 COPY 18 DATA OUT
 COPY AND VERIFY 3a DATA OUT
 INQUIRY 12 
 LOG SELECT 4c DATA OUT
 LOG SENSE 4d
 MODE SELECT (6) 15 DATA OUT
 MODE SELECT (10) 55 DATA OUT
 MODE SENSE (6) 1a
 MODE SENSE (10) 5a
 READ BUFFER 3c
 RECEIVE DIAGNOSTIC RESULTS 1c
 REQUEST SENSE 03
 SEND DIAGNOSTIC 1d DATA OUT
 TEST UNIT READY 00
 WRITE BUFFER 3b DATA OUT

 p.178: Commands for direct-access devices (not listed on p. 94)
 FORMAT UNIT 04 DATA OUT
 LOCK-UNLOCK CACHE 36
 PRE-FETCH 34
 PREVENT-ALLOW MEDIUM REMOVAL 1e
 READ (6)/RECEIVE 08
 READ (10) 3c
 READ CAPACITY 25
 READ DEFECT DATA (10) 37
 READ LONG 3e
 REASSIGN BLOCKS 07 DATA OUT
 RELEASE 17
 RESERVE 16 DATA OUT
 REZERO UNIT/REWIND 01
 SEARCH DATA EQUAL (10) 31 DATA OUT
 SEARCH DATA HIGH (10) 30 DATA OUT
 SEARCH DATA LOW (10) 32 DATA OUT
 SEEK (6) 0b
 SEEK (10) 2b
 SET LIMITS (10) 33
 START STOP UNIT 1b
 SYNCHRONIZE CACHE 35
 VERIFY (10) 2f
 WRITE (6)/PRINT/SEND 0a DATA OUT
 WRITE (10)/SEND 2a DATA OUT
 WRITE AND VERIFY (10) 2e DATA OUT
 WRITE LONG 3f DATA OUT
 WRITE SAME 41 DATA OUT ?

 p. 261: Commands for sequential-access devices (not previously listed)
 ERASE 19
 LOAD UNLOAD 1b
 LOCATE 2b
 READ BLOCK LIMITS 05
 READ POSITION 34
 READ REVERSE 0f
 RECOVER BUFFERED DATA 14
 SPACE 11
 WRITE FILEMARKS 10 ?

 p. 298: Commands for printer devices (not previously listed)
 ****** NOT SUPPORTED BY THIS DRIVER, since 0b is SEEK (6) *****
 SLEW AND PRINT 0b DATA OUT -- same as seek
 STOP PRINT 1b
 SYNCHRONIZE BUFFER 10

 p. 315: Commands for processor devices (not previously listed)

 p. 321: Commands for write-once devices (not previously listed)
 MEDIUM SCAN 38
 READ (12) a8
 SEARCH DATA EQUAL (12) b1 DATA OUT
 SEARCH DATA HIGH (12) b0 DATA OUT
 SEARCH DATA LOW (12) b2 DATA OUT
 SET LIMITS (12) b3
 VERIFY (12) af
 WRITE (12) aa DATA OUT
 WRITE AND VERIFY (12) ae DATA OUT

 p. 332: Commands for CD-ROM devices (not previously listed)
 PAUSE/RESUME 4b
 PLAY AUDIO (10) 45
 PLAY AUDIO (12) a5
 PLAY AUDIO MSF 47
 PLAY TRACK RELATIVE (10) 49
 PLAY TRACK RELATIVE (12) a9
 READ HEADER 44
 READ SUB-CHANNEL 42
 READ TOC 43

 p. 370: Commands for scanner devices (not previously listed)
 GET DATA BUFFER STATUS 34
 GET WINDOW 25
 OBJECT POSITION 31
 SCAN 1b
 SET WINDOW 24 DATA OUT

 p. 391: Commands for optical memory devices (not listed)
 ERASE (10) 2c
 ERASE (12) ac
 MEDIUM SCAN 38 DATA OUT
 READ DEFECT DATA (12) b7
 READ GENERATION 29
 READ UPDATED BLOCK 2d
 UPDATE BLOCK 3d DATA OUT

 p. 419: Commands for medium changer devices (not listed)
 EXCHANGE MEDIUM 46
 INITIALIZE ELEMENT STATUS 07
 MOVE MEDIUM a5
 POSITION TO ELEMENT 2b
 READ ELEMENT STATUS b8
 REQUEST VOL. ELEMENT ADDRESS b5
 SEND VOLUME TAG b6 DATA OUT

 p. 454: Commands for communications devices (not listed previously)
 GET MESSAGE (6) 08
 GET MESSAGE (10) 28
 GET MESSAGE (12) a8
 */

switch(current_SC->cmnd[0]) {
case CHANGE_DEFINITION:case COMPARE:case COPY:
case COPY_VERIFY:case LOG_SELECT:case MODE_SELECT:
case MODE_SELECT_10:case SEND_DIAGNOSTIC:case WRITE_BUFFER:

case FORMAT_UNIT:case REASSIGN_BLOCKS:case RESERVE:
case SEARCH_EQUAL:case SEARCH_HIGH:case SEARCH_LOW:
case WRITE_6:case WRITE_10:case WRITE_VERIFY:
case0x3f:case0x41:

case0xb1:case0xb0:case0xb2:
case0xaa:case0xae:

case0x24:

case0x38:case0x3d:

case0xb6:

case0xea:/* alternate number for WRITE LONG */

 current_SC->SCp.have_data_in = -1;
outb(0xd0| PARITY_MASK, TMC_Cntl_port );
break;

case0x00:
default:

 current_SC->SCp.have_data_in =1;
outb(0x90| PARITY_MASK, TMC_Cntl_port );
break;
}
}

if(current_SC->SCp.have_data_in == -1) {/* DATA OUT */
while( (data_count = FIFO_Size -inw( FIFO_Data_Count_port )) >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++, Write_FIFO_port );
--current_SC->SCp.this_residual;
}else{
 data_count >>=1;
outsw( Write_FIFO_port, 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 = current_SC->SCp.buffer->address;
 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( FIFO_Data_Count_port )) >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( Read_FIFO_port );
--current_SC->SCp.this_residual;
}else{
 data_count >>=1;/* Number of words */
insw( Read_FIFO_port, 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 = current_SC->SCp.buffer->address;
 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(&io_request_lock, flags);
my_done( (current_SC->SCp.Status &0xff)
| ((current_SC->SCp.Message &0xff) <<8) | (DID_OK <<16) );
spin_unlock_irqrestore(&io_request_lock, flags);
#if EVERY_ACCESS
printk("RETURNING.\n");
#endif

}else{
if(current_SC->SCp.phase & disconnect) {
outb(0xd0| FIFO_COUNT, Interrupt_Cntl_port );
outb(0x00, SCSI_Cntl_port );
}else{
outb(0x90| FIFO_COUNT, Interrupt_Cntl_port );
}
}
#if DEBUG_RACE
 in_interrupt_flag =0;
#endif
return;
}

intfdomain_16x0_queue( Scsi_Cmnd * SCpnt,void(*done)(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 = current_SC->SCp.buffer->address;
 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, Interrupt_Cntl_port );
outb(0x00, SCSI_Cntl_port );/* Disable data drivers */
outb( adapter_mask, SCSI_Data_NoACK_port );/* Set our id bit */
++in_command;
outb(0x20, Interrupt_Cntl_port );
outb(0x14| PARITY_MASK, TMC_Cntl_port );/* Start arbitration */

return0;
}

/* The following code, which simulates the old-style command function, was
 taken from Tommy Thorn's aha1542.c file. This code is Copyright (C)
 1992 Tommy Thorn. */

staticvolatileint internal_done_flag =0;
staticvolatileint internal_done_errcode =0;

static voidinternal_done( Scsi_Cmnd *SCpnt )
{
 internal_done_errcode = SCpnt->result;
++internal_done_flag;
}

intfdomain_16x0_command( Scsi_Cmnd *SCpnt )
{
fdomain_16x0_queue( SCpnt, internal_done );

while(!internal_done_flag)
;
 internal_done_flag =0;
return internal_done_errcode;
}

/* End of code derived from Tommy Thorn's work. */

voidprint_info( Scsi_Cmnd *SCpnt )
{
unsigned int imr;
unsigned int irr;
unsigned int isr;

if(!SCpnt || !SCpnt->host) {
printk("scsi: <fdomain> Cannot provide detailed information\n");
return;
}

printk("%s\n",fdomain_16x0_info( SCpnt->host ) );
print_banner( SCpnt->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->target,
*(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( SCSI_Status_port ) );
printk("TMC Status = 0x%02x",inb( TMC_Status_port ) );
if(inb( TMC_Status_port &1))
printk(" (interrupt)");
printk("\n");
printk("Interrupt Status = 0x%02x",inb( Interrupt_Status_port ) );
if(inb( Interrupt_Status_port ) &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 ) );
}

intfdomain_16x0_abort( Scsi_Cmnd *SCpnt)
{
unsigned long flags;
#if EVERY_ACCESS || ERRORS_ONLY || DEBUG_ABORT
printk("scsi: <fdomain> abort ");
#endif

save_flags( flags );
cli();
if(!in_command) {
#if EVERY_ACCESS || ERRORS_ONLY
printk(" (not in command)\n");
#endif
restore_flags( flags );
return SCSI_ABORT_NOT_RUNNING;
}elseprintk("\n");

#if DEBUG_ABORT
print_info( SCpnt );
#endif

fdomain_make_bus_idle();

 current_SC->SCp.phase |= aborted;

 current_SC->result = DID_ABORT <<16;

restore_flags( flags );

/* Aborts are not done well. . . */
my_done( DID_ABORT <<16);

return SCSI_ABORT_SUCCESS;
}

intfdomain_16x0_reset( Scsi_Cmnd *SCpnt,unsigned int ignored )
{
#if DEBUG_RESET
static int called_once =0;
#endif

#if ERRORS_ONLY
if(SCpnt)printk("scsi: <fdomain> SCSI Bus Reset\n");
#endif

#if DEBUG_RESET
if(called_once)print_info( current_SC );
 called_once =1;
#endif

outb(1, SCSI_Cntl_port );
do_pause(2);
outb(0, SCSI_Cntl_port );
do_pause(115);
outb(0, SCSI_Mode_Cntl_port );
outb( PARITY_MASK, TMC_Cntl_port );

/* Unless this is the very first call (i.e., SCPnt == NULL), everything
 is probably hosed at this point. We will, however, try to keep
 things going by informing the high-level code that we need help. */

return SCSI_RESET_WAKEUP;
}

#include"sd.h"
#include <scsi/scsi_ioctl.h>

intfdomain_16x0_biosparam( Scsi_Disk *disk, kdev_t dev,int*info_array )
{
int drive;
unsigned char buf[512+sizeof(Scsi_Ioctl_Command)];
 Scsi_Ioctl_Command *sic = (Scsi_Ioctl_Command *) buf;
int size = disk->capacity;
unsigned char*data = sic->data;
unsigned char do_read[] = { READ_6,0,0,0,1,0};
int retcode;
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(dev) != SCSI_DISK0_MAJOR) {
printk("scsi: <fdomain> fdomain_16x0_biosparam: too many disks");
return0;
}
 drive =MINOR(dev) >>4;

if(bios_major ==2) {
switch(Quantum) {
case2:/* ISA_200S */
/* The value of 25 has never been verified.
 It should probably be 15. */
 offset = bios_base +0x1f33+ drive *25;
break;
case3:/* ISA_250MG */
 offset = bios_base +0x1f36+ drive *15;
break;
case4:/* ISA_200S (another one) */
 offset = bios_base +0x1f34+ drive *15;
break;
default:
 offset = bios_base +0x1f31+ drive *25;
break;
}
memcpy_fromio( &i, 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_base +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!). */

 sic->inlen =0;/* zero bytes out */
 sic->outlen =512;/* one sector in */
memcpy( data, do_read,sizeof( do_read ) );
 retcode =kernel_scsi_ioctl( disk->device,
 SCSI_IOCTL_SEND_COMMAND,
 sic );
if(!retcode /* SCSI command ok */
&& data[511] ==0xaa&& data[510] ==0x55/* Partition table valid */
&& data[0x1c2]) {/* 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] = data[0x1c3] +1;/* heads */
 info_array[1] = data[0x1c4] &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] );
}

return0;
}

#ifdef MODULE
/* Eventually this will go into an include file, but this will be later */
Scsi_Host_Template driver_template = FDOMAIN_16X0;

#include"scsi_module.c"
#endif