Return to fdomain.c CVS log

Up to [GnuMach] / Gnu-Mach / i386 / i386at / gpl / linux / scsi

Annotation of Gnu-Mach/i386/i386at/gpl/linux/scsi/fdomain.c, revision 1.1

1.1     ! root        1: /* fdomain.c -- Future Domain TMC-16x0 SCSI driver
        !             2:  * Created: Sun May  3 18:53:19 1992 by [email protected]
        !             3:  * Revised: Thu Oct 12 15:59:37 1995 by [email protected]
        !             4:  * Author: Rickard E. Faith, [email protected]
        !             5:  * Copyright 1992, 1993, 1994, 1995 Rickard E. Faith
        !             6:  *
        !             7:  * $Id: fdomain.c,v 1.1.1.1 1997/02/25 21:27:49 thomas Exp $
        !             8: 
        !             9:  * This program is free software; you can redistribute it and/or modify it
        !            10:  * under the terms of the GNU General Public License as published by the
        !            11:  * Free Software Foundation; either version 2, or (at your option) any
        !            12:  * later version.
        !            13: 
        !            14:  * This program is distributed in the hope that it will be useful, but
        !            15:  * WITHOUT ANY WARRANTY; without even the implied warranty of
        !            16:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            17:  * General Public License for more details.
        !            18: 
        !            19:  * You should have received a copy of the GNU General Public License along
        !            20:  * with this program; if not, write to the Free Software Foundation, Inc.,
        !            21:  * 675 Mass Ave, Cambridge, MA 02139, USA.
        !            22: 
        !            23:  **************************************************************************
        !            24:  
        !            25:  DESCRIPTION:
        !            26: 
        !            27:  This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680
        !            28:  TMC-1650/1670, and TMC-3260 SCSI host adapters.  The 1650 and 1670 have a
        !            29:  25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin
        !            30:  high-density external connector.  The 1670 and 1680 have floppy disk
        !            31:  controllers built in.  The TMC-3260 is a PCI bus card.
        !            32: 
        !            33:  Future Domain's older boards are based on the TMC-1800 chip, and this
        !            34:  driver was originally written for a TMC-1680 board with the TMC-1800 chip.
        !            35:  More recently, boards are being produced with the TMC-18C50 and TMC-18C30
        !            36:  chips.  The latest and greatest board may not work with this driver.  If
        !            37:  you have to patch this driver so that it will recognize your board's BIOS
        !            38:  signature, then the driver may fail to function after the board is
        !            39:  detected.
        !            40: 
        !            41:  The following BIOS versions are supported: 2.0, 3.0, 3.2, 3.4, and 3.5.
        !            42:  The following chips are supported: TMC-1800, TMC-18C50, TMC-18C30.
        !            43:  Reports suggest that the driver will also work with the 36C70 chip and
        !            44:  with the Quantum ISA-200S and ISA-250MG SCSI adapters.
        !            45: 
        !            46:  Please note that the drive ordering that Future Domain implemented in BIOS
        !            47:  versions 3.4 and 3.5 is the opposite of the order (currently) used by the
        !            48:  rest of the SCSI industry.  If you have BIOS version 3.4 or 3.5, and have
        !            49:  more then one drive, then the drive ordering will be the reverse of that
        !            50:  which you see under DOS.  For example, under DOS SCSI ID 0 will be D: and
        !            51:  SCSI ID 1 will be C: (the boot device).  Under Linux, SCSI ID 0 will be
        !            52:  /dev/sda and SCSI ID 1 will be /dev/sdb.  The Linux ordering is consistent
        !            53:  with that provided by all the other SCSI drivers for Linux.  If you want
        !            54:  this changed, send me patches that are protected by #ifdefs.
        !            55: 
        !            56:  If you have a TMC-8xx or TMC-9xx board, then this is not the driver for
        !            57:  your board.  Please refer to the Seagate driver for more information and
        !            58:  possible support.
        !            59: 
        !            60:  
        !            61: 
        !            62:  REFERENCES USED:
        !            63: 
        !            64:  "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation,
        !            65:  1990.
        !            66: 
        !            67:  "Technical Reference Manual: 18C50 SCSI Host Adapter Chip", Future Domain
        !            68:  Corporation, January 1992.
        !            69: 
        !            70:  "LXT SCSI Products: Specifications and OEM Technical Manual (Revision
        !            71:  B/September 1991)", Maxtor Corporation, 1991.
        !            72: 
        !            73:  "7213S product Manual (Revision P3)", Maxtor Corporation, 1992.
        !            74: 
        !            75:  "Draft Proposed American National Standard: Small Computer System
        !            76:  Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109,
        !            77:  revision 10h, October 17, 1991)
        !            78: 
        !            79:  Private communications, Drew Eckhardt ([email protected]) and Eric
        !            80:  Youngdale ([email protected]), 1992.
        !            81: 
        !            82:  Private communication, Tuong Le (Future Domain Engineering department),
        !            83:  1994. (Disk geometry computations for Future Domain BIOS version 3.4, and
        !            84:  TMC-18C30 detection.)
        !            85: 
        !            86:  Hogan, Thom. The Programmer's PC Sourcebook. Microsoft Press, 1988. Page
        !            87:  60 (2.39: Disk Partition Table Layout).
        !            88: 
        !            89:  "18C30 Technical Reference Manual", Future Domain Corporation, 1993, page
        !            90:  6-1.
        !            91: 
        !            92: 
        !            93:  
        !            94:  NOTES ON REFERENCES:
        !            95: 
        !            96:  The Maxtor manuals were free.  Maxtor telephone technical support is
        !            97:  great!
        !            98: 
        !            99:  The Future Domain manuals were $25 and $35.  They document the chip, not
        !           100:  the TMC-16x0 boards, so some information I had to guess at.  In 1992,
        !           101:  Future Domain sold DOS BIOS source for $250 and the UN*X driver source was
        !           102:  $750, but these required a non-disclosure agreement, so even if I could
        !           103:  have afforded them, they would *not* have been useful for writing this
        !           104:  publically distributable driver.  Future Domain technical support has
        !           105:  provided some information on the phone and have sent a few useful FAXs.
        !           106:  They have been much more helpful since they started to recognize that the
        !           107:  word "Linux" refers to an operating system :-).
        !           108: 
        !           109:  
        !           110: 
        !           111:  ALPHA TESTERS:
        !           112: 
        !           113:  There are many other alpha testers that come and go as the driver
        !           114:  develops.  The people listed here were most helpful in times of greatest
        !           115:  need (mostly early on -- I've probably left out a few worthy people in
        !           116:  more recent times):
        !           117: 
        !           118:  Todd Carrico ([email protected]), Dan Poirier ([email protected] ), Ken
        !           119:  Corey ([email protected]), C. de Bruin (bruin@[email protected]), Sakari
        !           120:  Aaltonen ([email protected]), John Rice ([email protected]), Brad
        !           121:  Yearwood ([email protected]), and Ray Toy ([email protected]).
        !           122: 
        !           123:  Special thanks to Tien-Wan Yang ([email protected]), who graciously lent me
        !           124:  his 18C50-based card for debugging.  He is the sole reason that this
        !           125:  driver works with the 18C50 chip.
        !           126: 
        !           127:  Thanks to Dave Newman ([email protected]) for providing initial patches for
        !           128:  the version 3.4 BIOS.
        !           129: 
        !           130:  Thanks to James T. McKinley ([email protected]) for providing
        !           131:  patches that support the TMC-3260, a PCI bus card with the 36C70 chip.
        !           132:  The 36C70 chip appears to be "completely compatible" with the 18C30 chip.
        !           133: 
        !           134:  Thanks to Eric Kasten ([email protected]) for providing the
        !           135:  patch for the version 3.5 BIOS.
        !           136: 
        !           137:  Thanks for Stephen Henson ([email protected]) for providing the
        !           138:  patch for the Quantum ISA-200S SCSI adapter.
        !           139:  
        !           140:  Thanks to Adam Bowen for the signature to the 1610M/MER/MEX scsi cards, to
        !           141:  Martin Andrews ([email protected]) for the signature to some
        !           142:  random TMC-1680 repackaged by IBM; and to Mintak Ng ([email protected]) for
        !           143:  the version 3.61 BIOS siganture.
        !           144: 
        !           145:  Thanks for Mark Singer ([email protected]) and Richard Simpson
        !           146:  ([email protected]) for more Quantum signatures and detective
        !           147:  work on the Quantum RAM layout.
        !           148: 
        !           149:  Special thanks to James T. McKinley ([email protected]) for
        !           150:  providing patches for proper PCI BIOS32-mediated detection of the TMC-3260
        !           151:  card (a PCI bus card with the 36C70 chip).  Please send James PCI-related
        !           152:  bug reports.
        !           153: 
        !           154:  Thanks to Tom Cavin ([email protected]) for preliminary command-line option
        !           155:  patches.
        !           156:  
        !           157:  All of the alpha testers deserve much thanks.
        !           158: 
        !           159: 
        !           160: 
        !           161:  NOTES ON USER DEFINABLE OPTIONS:
        !           162: 
        !           163:  DEBUG: This turns on the printing of various debug information.
        !           164: 
        !           165:  ENABLE_PARITY: This turns on SCSI parity checking.  With the current
        !           166:  driver, all attached devices must support SCSI parity.  If none of your
        !           167:  devices support parity, then you can probably get the driver to work by
        !           168:  turning this option off.  I have no way of testing this, however.
        !           169: 
        !           170:  FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the
        !           171:  18C30 chip have a 2k cache).  When this many 512 byte blocks are filled by
        !           172:  the SCSI device, an interrupt will be raised.  Therefore, this could be as
        !           173:  low as 0, or as high as 16.  Note, however, that values which are too high
        !           174:  or too low seem to prevent any interrupts from occurring, and thereby lock
        !           175:  up the machine.  I have found that 2 is a good number, but throughput may
        !           176:  be increased by changing this value to values which are close to 2.
        !           177:  Please let me know if you try any different values.
        !           178: 
        !           179:  DO_DETECT: This activates some old scan code which was needed before the
        !           180:  high level drivers got fixed.  If you are having trouble with the driver,
        !           181:  turning this on should not hurt, and might help.  Please let me know if
        !           182:  this is the case, since this code will be removed from future drivers.
        !           183: 
        !           184:  RESELECTION: This is no longer an option, since I gave up trying to
        !           185:  implement it in version 4.x of this driver.  It did not improve
        !           186:  performance at all and made the driver unstable (because I never found one
        !           187:  of the two race conditions which were introduced by the multiple
        !           188:  outstanding command code).  The instability seems a very high price to pay
        !           189:  just so that you don't have to wait for the tape to rewind.  If you want
        !           190:  this feature implemented, send me patches.  I'll be happy to send a copy
        !           191:  of my (broken) driver to anyone who would like to see a copy.
        !           192: 
        !           193:  **************************************************************************/
        !           194: 
        !           195: #ifdef MODULE
        !           196: #include <linux/module.h>
        !           197: #endif
        !           198: 
        !           199: #include <linux/sched.h>
        !           200: #include <asm/io.h>
        !           201: #include <linux/blk.h>
        !           202: #include "scsi.h"
        !           203: #include "hosts.h"
        !           204: #include "fdomain.h"
        !           205: #include <asm/system.h>
        !           206: #include <linux/errno.h>
        !           207: #include <linux/string.h>
        !           208: #include <linux/ioport.h>
        !           209: #include <linux/proc_fs.h>
        !           210: #include <linux/bios32.h>
        !           211: #include <linux/pci.h>
        !           212: #include <linux/stat.h>
        !           213: 
        !           214: #include <linux/config.h>      /* for CONFIG_PCI */
        !           215: 
        !           216: struct proc_dir_entry proc_scsi_fdomain = {
        !           217:     PROC_SCSI_FDOMAIN, 7, "fdomain",
        !           218:     S_IFDIR | S_IRUGO | S_IXUGO, 2
        !           219: };
        !           220:   
        !           221: #define VERSION          "$Revision: 1.1.1.1 $"
        !           222: 
        !           223: /* START OF USER DEFINABLE OPTIONS */
        !           224: 
        !           225: #define DEBUG            1     /* Enable debugging output */
        !           226: #define ENABLE_PARITY    1     /* Enable SCSI Parity */
        !           227: #define FIFO_COUNT       2     /* Number of 512 byte blocks before INTR */
        !           228: #define DO_DETECT        0     /* Do device detection here (see scsi.c) */
        !           229: 
        !           230: /* END OF USER DEFINABLE OPTIONS */
        !           231: 
        !           232: #if DEBUG
        !           233: #define EVERY_ACCESS     0     /* Write a line on every scsi access */
        !           234: #define ERRORS_ONLY      1     /* Only write a line if there is an error */
        !           235: #define DEBUG_DETECT     0     /* Debug fdomain_16x0_detect() */
        !           236: #define DEBUG_MESSAGES   1     /* Debug MESSAGE IN phase */
        !           237: #define DEBUG_ABORT      1     /* Debug abort() routine */
        !           238: #define DEBUG_RESET      1     /* Debug reset() routine */
        !           239: #define DEBUG_RACE       1      /* Debug interrupt-driven race condition */
        !           240: #else
        !           241: #define EVERY_ACCESS     0     /* LEAVE THESE ALONE--CHANGE THE ONES ABOVE */
        !           242: #define ERRORS_ONLY      0
        !           243: #define DEBUG_DETECT     0
        !           244: #define DEBUG_MESSAGES   0
        !           245: #define DEBUG_ABORT      0
        !           246: #define DEBUG_RESET      0
        !           247: #define DEBUG_RACE       0
        !           248: #endif
        !           249: 
        !           250: /* Errors are reported on the line, so we don't need to report them again */
        !           251: #if EVERY_ACCESS
        !           252: #undef ERRORS_ONLY
        !           253: #define ERRORS_ONLY      0
        !           254: #endif
        !           255: 
        !           256: #if ENABLE_PARITY
        !           257: #define PARITY_MASK      0x08
        !           258: #else
        !           259: #define PARITY_MASK      0x00
        !           260: #endif
        !           261: 
        !           262: enum chip_type {
        !           263:    unknown          = 0x00,
        !           264:    tmc1800          = 0x01,
        !           265:    tmc18c50         = 0x02,
        !           266:    tmc18c30         = 0x03,
        !           267: };
        !           268: 
        !           269: enum {
        !           270:    in_arbitration   = 0x02,
        !           271:    in_selection     = 0x04,
        !           272:    in_other         = 0x08,
        !           273:    disconnect       = 0x10,
        !           274:    aborted          = 0x20,
        !           275:    sent_ident       = 0x40,
        !           276: };
        !           277: 
        !           278: enum in_port_type {
        !           279:    Read_SCSI_Data   =  0,
        !           280:    SCSI_Status      =  1,
        !           281:    TMC_Status       =  2,
        !           282:    FIFO_Status      =  3,      /* tmc18c50/tmc18c30 only */
        !           283:    Interrupt_Cond   =  4,      /* tmc18c50/tmc18c30 only */
        !           284:    LSB_ID_Code      =  5,
        !           285:    MSB_ID_Code      =  6,
        !           286:    Read_Loopback    =  7,
        !           287:    SCSI_Data_NoACK  =  8,
        !           288:    Interrupt_Status =  9,
        !           289:    Configuration1   = 10,
        !           290:    Configuration2   = 11,      /* tmc18c50/tmc18c30 only */
        !           291:    Read_FIFO        = 12,
        !           292:    FIFO_Data_Count  = 14
        !           293: };
        !           294: 
        !           295: enum out_port_type {
        !           296:    Write_SCSI_Data  =  0,
        !           297:    SCSI_Cntl        =  1,
        !           298:    Interrupt_Cntl   =  2,
        !           299:    SCSI_Mode_Cntl   =  3,
        !           300:    TMC_Cntl         =  4,
        !           301:    Memory_Cntl      =  5,      /* tmc18c50/tmc18c30 only */
        !           302:    Write_Loopback   =  7,
        !           303:    IO_Control       = 11,      /* tmc18c30 only */
        !           304:    Write_FIFO       = 12
        !           305: };
        !           306: 
        !           307: static int               port_base         = 0;
        !           308: static void              *bios_base        = NULL;
        !           309: static int               bios_major        = 0;
        !           310: static int               bios_minor        = 0;
        !           311: static int               PCI_bus           = 0;
        !           312: static int               Quantum           = 0;        /* Quantum board variant */
        !           313: static int               interrupt_level   = 0;
        !           314: static volatile int      in_command        = 0;
        !           315: static Scsi_Cmnd         *current_SC       = NULL;
        !           316: static enum chip_type    chip              = unknown;
        !           317: static int               adapter_mask      = 0;
        !           318: static int               this_id           = 0;
        !           319: static int               setup_called      = 0;
        !           320: 
        !           321: #if DEBUG_RACE
        !           322: static volatile int      in_interrupt_flag = 0;
        !           323: #endif
        !           324: 
        !           325: static int               SCSI_Mode_Cntl_port;
        !           326: static int               FIFO_Data_Count_port;
        !           327: static int               Interrupt_Cntl_port;
        !           328: static int               Interrupt_Status_port;
        !           329: static int               Read_FIFO_port;
        !           330: static int               Read_SCSI_Data_port;
        !           331: static int               SCSI_Cntl_port;
        !           332: static int               SCSI_Data_NoACK_port;
        !           333: static int               SCSI_Status_port;
        !           334: static int               TMC_Cntl_port;
        !           335: static int               TMC_Status_port;
        !           336: static int               Write_FIFO_port;
        !           337: static int               Write_SCSI_Data_port;
        !           338: 
        !           339: static int               FIFO_Size = 0x2000; /* 8k FIFO for
        !           340:                                                pre-tmc18c30 chips */
        !           341: 
        !           342: extern void              fdomain_16x0_intr( int irq, struct pt_regs * regs );
        !           343: 
        !           344: static void *addresses[] = {
        !           345:    (void *)0xc8000,
        !           346:    (void *)0xca000,
        !           347:    (void *)0xce000,
        !           348:    (void *)0xde000,
        !           349:    (void *)0xd0000,            /* Extra addresses for PCI boards */
        !           350:    (void *)0xe0000,
        !           351: };
        !           352: #define ADDRESS_COUNT (sizeof( addresses ) / sizeof( unsigned ))
        !           353:                       
        !           354: static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 };
        !           355: #define PORT_COUNT (sizeof( ports ) / sizeof( unsigned short ))
        !           356: 
        !           357: static unsigned short ints[] = { 3, 5, 10, 11, 12, 14, 15, 0 };
        !           358: 
        !           359: /*
        !           360: 
        !           361:   READ THIS BEFORE YOU ADD A SIGNATURE!
        !           362: 
        !           363:   READING THIS SHORT NOTE CAN SAVE YOU LOTS OF TIME!
        !           364: 
        !           365:   READ EVERY WORD, ESPECIALLY THE WORD *NOT*
        !           366: 
        !           367:   This driver works *ONLY* for Future Domain cards using the TMC-1800,
        !           368:   TMC-18C50, or TMC-18C30 chip.  This includes models TMC-1650, 1660, 1670,
        !           369:   and 1680.
        !           370: 
        !           371:   The following BIOS signature signatures are for boards which do *NOT*
        !           372:   work with this driver (these TMC-8xx and TMC-9xx boards may work with the
        !           373:   Seagate driver):
        !           374: 
        !           375:   FUTURE DOMAIN CORP. (C) 1986-1988 V4.0I 03/16/88
        !           376:   FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89
        !           377:   FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89
        !           378:   FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90
        !           379:   FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90
        !           380:   FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90
        !           381:   FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92
        !           382: 
        !           383: */
        !           384: 
        !           385: struct signature {
        !           386:    const char *signature;
        !           387:    int  sig_offset;
        !           388:    int  sig_length;
        !           389:    int  major_bios_version;
        !           390:    int  minor_bios_version;
        !           391:    int  flag; /* 1 == PCI_bus, 2 == ISA_200S, 3 == ISA_250MG, 4 == ISA_200S */
        !           392: } signatures[] = {
        !           393:    /*          1         2         3         4         5         6 */
        !           394:    /* 123456789012345678901234567890123456789012345678901234567890 */
        !           395:    { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89",  5, 50,  2,  0, 0 },
        !           396:    { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V1.07/28/89",  5, 50,  2,  0, 0 },
        !           397:    { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 72, 50,  2,  0, 2 },
        !           398:    { "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.0",        73, 43,  2,  0, 3 },
        !           399:    { "FUTURE DOMAIN CORP. (C) 1991 1800-V2.0.",            72, 39,  2,  0, 4 },
        !           400:    { "FUTURE DOMAIN CORP. (C) 1992 V3.00.004/02/92",        5, 44,  3,  0, 0 },
        !           401:    { "FUTURE DOMAIN TMC-18XX (C) 1993 V3.203/12/93",        5, 44,  3,  2, 0 },
        !           402:    { "IBM F1 P2 BIOS v1.0104/29/93",                        5, 28,  3, -1, 0 },
        !           403:    { "Future Domain Corp. V1.0008/18/93",                   5, 33,  3,  4, 0 },
        !           404:    { "Future Domain Corp. V1.0008/18/93",                  26, 33,  3,  4, 1 },
        !           405:                                /* This next signature may not be a 3.5 bios */
        !           406:    { "Future Domain Corp. V2.0108/18/93",                   5, 33,  3,  5, 0 },
        !           407:    { "FUTURE DOMAIN CORP.  V3.5008/18/93",                  5, 34,  3,  5, 0 },
        !           408:    { "FUTURE DOMAIN 18c30/18c50/1800 (C) 1994 V3.5",        5, 44,  3,  5, 0 },
        !           409:    { "FUTURE DOMAIN CORP.  V3.6008/18/93",                  5, 34,  3,  6, 0 },
        !           410:    { "FUTURE DOMAIN CORP.  V3.6108/18/93",                  5, 34,  3,  6, 0 },
        !           411:    { "FUTURE DOMAIN TMC-18XX",                              5, 22, -1, -1, 0 },
        !           412: 
        !           413:    /* READ NOTICE ABOVE *BEFORE* YOU WASTE YOUR TIME ADDING A SIGNATURE
        !           414:     Also, fix the disk geometry code for your signature and send your
        !           415:     changes for [email protected].  Above all, do *NOT* change any old
        !           416:     signatures!
        !           417: 
        !           418:     Note that the last line will match a "generic" 18XX bios.  Because
        !           419:     Future Domain has changed the host SCSI ID and/or the location of the
        !           420:     geometry information in the on-board RAM area for each of the first
        !           421:     three BIOS's, it is still important to enter a fully qualified
        !           422:     signature in the table for any new BIOS's (after the host SCSI ID and
        !           423:     geometry location are verified). */
        !           424: };
        !           425: 
        !           426: #define SIGNATURE_COUNT (sizeof( signatures ) / sizeof( struct signature ))
        !           427: 
        !           428: static void print_banner( struct Scsi_Host *shpnt )
        !           429: {
        !           430:    if (!shpnt) return;         /* This won't ever happen */
        !           431: 
        !           432:    if (bios_major < 0 && bios_minor < 0) {
        !           433:       printk( "scsi%d <fdomain>: No BIOS; using scsi id %d\n",
        !           434:              shpnt->host_no, shpnt->this_id );
        !           435:    } else {
        !           436:       printk( "scsi%d <fdomain>: BIOS version ", shpnt->host_no );
        !           437: 
        !           438:       if (bios_major >= 0) printk( "%d.", bios_major );
        !           439:       else                 printk( "?." );
        !           440: 
        !           441:       if (bios_minor >= 0) printk( "%d", bios_minor );
        !           442:       else                 printk( "?." );
        !           443:    
        !           444:       printk( " at 0x%x using scsi id %d\n",
        !           445:              (unsigned)bios_base, shpnt->this_id );
        !           446:    }
        !           447: 
        !           448:                                /* If this driver works for later FD PCI
        !           449:                                   boards, we will have to modify banner
        !           450:                                   for additional PCI cards, but for now if
        !           451:                                   it's PCI it's a TMC-3260 - JTM */
        !           452:    printk( "scsi%d <fdomain>: %s chip at 0x%x irq ",
        !           453:           shpnt->host_no,
        !           454:           chip == tmc1800 ? "TMC-1800"
        !           455:           : (chip == tmc18c50 ? "TMC-18C50"
        !           456:              : (chip == tmc18c30 ?
        !           457:                 (PCI_bus ? "TMC-36C70 (PCI bus)" : "TMC-18C30")
        !           458:                 : "Unknown")),
        !           459:           port_base );
        !           460: 
        !           461:    if (interrupt_level) printk( "%d", interrupt_level );
        !           462:    else                 printk( "<none>" );
        !           463: 
        !           464:    printk( "\n" );
        !           465: }
        !           466: 
        !           467: void fdomain_setup( char *str, int *ints )
        !           468: {
        !           469:    if (setup_called++ || ints[0] < 2 || ints[0] > 3) {
        !           470:       printk( "fdomain: usage: fdomain=<PORT_BASE>,<IRQ>[,<ADAPTER_ID>]\n" );
        !           471:       printk( "fdomain: bad LILO parameters?\n" );
        !           472:    }
        !           473: 
        !           474:    port_base       = ints[0] >= 1 ? ints[1] : 0;
        !           475:    interrupt_level = ints[0] >= 2 ? ints[2] : 0;
        !           476:    this_id         = ints[0] >= 3 ? ints[3] : 0;
        !           477:    
        !           478:    bios_major = bios_minor = -1; /* Use geometry for BIOS version >= 3.4 */
        !           479: }
        !           480: 
        !           481: 
        !           482: static void do_pause( unsigned amount )        /* Pause for amount*10 milliseconds */
        !           483: {
        !           484:    unsigned long the_time = jiffies + amount; /* 0.01 seconds per jiffy */
        !           485: 
        !           486:    while (jiffies < the_time);
        !           487: }
        !           488: 
        !           489: inline static void fdomain_make_bus_idle( void )
        !           490: {
        !           491:    outb( 0, SCSI_Cntl_port );
        !           492:    outb( 0, SCSI_Mode_Cntl_port );
        !           493:    if (chip == tmc18c50 || chip == tmc18c30)
        !           494:         outb( 0x21 | PARITY_MASK, TMC_Cntl_port ); /* Clear forced intr. */
        !           495:    else
        !           496:         outb( 0x01 | PARITY_MASK, TMC_Cntl_port );
        !           497: }
        !           498: 
        !           499: static int fdomain_is_valid_port( int port )
        !           500: {
        !           501: #if DEBUG_DETECT 
        !           502:    printk( " (%x%x),",
        !           503:           inb( port + MSB_ID_Code ), inb( port + LSB_ID_Code ) );
        !           504: #endif
        !           505: 
        !           506:    /* The MCA ID is a unique id for each MCA compatible board.  We
        !           507:       are using ISA boards, but Future Domain provides the MCA ID
        !           508:       anyway.  We can use this ID to ensure that this is a Future
        !           509:       Domain TMC-1660/TMC-1680.
        !           510:     */
        !           511: 
        !           512:    if (inb( port + LSB_ID_Code ) != 0xe9) { /* test for 0x6127 id */
        !           513:       if (inb( port + LSB_ID_Code ) != 0x27) return 0;
        !           514:       if (inb( port + MSB_ID_Code ) != 0x61) return 0;
        !           515:       chip = tmc1800;
        !           516:    } else {                                /* test for 0xe960 id */
        !           517:       if (inb( port + MSB_ID_Code ) != 0x60) return 0;
        !           518:       chip = tmc18c50;
        !           519: 
        !           520: #if 0
        !           521: 
        !           522:                                /* Try to toggle 32-bit mode.  This only
        !           523:                                   works on an 18c30 chip.  (User reports
        !           524:                                   say that this doesn't work at all, so
        !           525:                                   we'll use the other method.) */
        !           526: 
        !           527:       outb( 0x80, port + IO_Control );
        !           528:       if ((inb( port + Configuration2 ) & 0x80) == 0x80) {
        !           529:         outb( 0x00, port + IO_Control );
        !           530:         if ((inb( port + Configuration2 ) & 0x80) == 0x00) {
        !           531:            chip = tmc18c30;
        !           532:            FIFO_Size = 0x800;  /* 2k FIFO */
        !           533:         }
        !           534:       }
        !           535: #else
        !           536: 
        !           537:                                /* That should have worked, but appears to
        !           538:                                   have problems.  Lets assume it is an
        !           539:                                   18c30 if the RAM is disabled. */
        !           540: 
        !           541:       if (inb( port + Configuration2 ) & 0x02) {
        !           542:         chip      = tmc18c30;
        !           543:         FIFO_Size = 0x800;     /* 2k FIFO */
        !           544:       }
        !           545: #endif
        !           546:                                /* If that failed, we are an 18c50. */
        !           547:    }
        !           548: 
        !           549:    return 1;
        !           550: }
        !           551: 
        !           552: static int fdomain_test_loopback( void )
        !           553: {
        !           554:    int i;
        !           555:    int result;
        !           556: 
        !           557:    for (i = 0; i < 255; i++) {
        !           558:       outb( i, port_base + Write_Loopback );
        !           559:       result = inb( port_base + Read_Loopback );
        !           560:       if (i != result)
        !           561:            return 1;
        !           562:    }
        !           563:    return 0;
        !           564: }
        !           565: 
        !           566: /* fdomain_get_irq assumes that we have a valid MCA ID for a
        !           567:    TMC-1660/TMC-1680 Future Domain board.  Now, check to be sure the
        !           568:    bios_base matches these ports.  If someone was unlucky enough to have
        !           569:    purchased more than one Future Domain board, then they will have to
        !           570:    modify this code, as we only detect one board here.  [The one with the
        !           571:    lowest bios_base.]
        !           572: 
        !           573:    Note that this routine is only used for systems without a PCI BIOS32
        !           574:    (e.g., ISA bus).  For PCI bus systems, this routine will likely fail
        !           575:    unless one of the IRQs listed in the ints array is used by the board.
        !           576:    Sometimes it is possible to use the computer's BIOS setup screen to
        !           577:    configure a PCI system so that one of these IRQs will be used by the
        !           578:    Future Domain card. */
        !           579: 
        !           580: static int fdomain_get_irq( int base )
        !           581: {
        !           582:    int options = inb( base + Configuration1 );
        !           583: 
        !           584: #if DEBUG_DETECT
        !           585:    printk( " Options = %x\n", options );
        !           586: #endif
        !           587:    
        !           588:                                /* Check for board with lowest bios_base --
        !           589:                                   this isn't valid for the 18c30 or for
        !           590:                                   boards on the PCI bus, so just assume we
        !           591:                                   have the right board. */
        !           592: 
        !           593:    if (chip != tmc18c30
        !           594:        && !PCI_bus
        !           595:        && addresses[ (options & 0xc0) >> 6 ] != bios_base) return 0;
        !           596: 
        !           597:    return ints[ (options & 0x0e) >> 1 ];
        !           598: }
        !           599: 
        !           600: static int fdomain_isa_detect( int *irq, int *iobase )
        !           601: {
        !           602:    int i;
        !           603:    int base;
        !           604:    int flag = 0;
        !           605: 
        !           606:    if (bios_major == 2) {
        !           607:       /* The TMC-1660/TMC-1680 has a RAM area just after the BIOS ROM.
        !           608:         Assuming the ROM is enabled (otherwise we wouldn't have been
        !           609:         able to read the ROM signature :-), then the ROM sets up the
        !           610:         RAM area with some magic numbers, such as a list of port
        !           611:         base addresses and a list of the disk "geometry" reported to
        !           612:         DOS (this geometry has nothing to do with physical geometry).
        !           613:        */
        !           614: 
        !           615:       switch (Quantum) {
        !           616:       case 2:                  /* ISA_200S */
        !           617:       case 3:                  /* ISA_250MG */
        !           618:         base = *((char *)bios_base + 0x1fa2)
        !           619:               + (*((char *)bios_base + 0x1fa3) << 8);
        !           620:         break;
        !           621:       case 4:                  /* ISA_200S (another one) */
        !           622:         base = *((char *)bios_base + 0x1fa3)
        !           623:               + (*((char *)bios_base + 0x1fa4) << 8);
        !           624:         break;
        !           625:       default:
        !           626:         base = *((char *)bios_base + 0x1fcc)
        !           627:               + (*((char *)bios_base + 0x1fcd) << 8);
        !           628:         break;
        !           629:       }
        !           630:    
        !           631: #if DEBUG_DETECT
        !           632:       printk( " %x,", base );
        !           633: #endif
        !           634: 
        !           635:       for (flag = 0, i = 0; !flag && i < PORT_COUNT; i++) {
        !           636:         if (base == ports[i])
        !           637:               ++flag;
        !           638:       }
        !           639: 
        !           640:       if (flag && fdomain_is_valid_port( base )) {
        !           641:         *irq    = fdomain_get_irq( base );
        !           642:         *iobase = base;
        !           643:         return 1;
        !           644:       }
        !           645:       
        !           646:       /* This is a bad sign.  It usually means that someone patched the
        !           647:         BIOS signature list (the signatures variable) to contain a BIOS
        !           648:         signature for a board *OTHER THAN* the TMC-1660/TMC-1680. */
        !           649:       
        !           650: #if DEBUG_DETECT
        !           651:       printk( " RAM FAILED, " );
        !           652: #endif
        !           653:    }
        !           654: 
        !           655:    /* Anyway, the alternative to finding the address in the RAM is to just
        !           656:       search through every possible port address for one that is attached
        !           657:       to the Future Domain card.  Don't panic, though, about reading all
        !           658:       these random port addresses -- there are rumors that the Future
        !           659:       Domain BIOS does something very similar.
        !           660: 
        !           661:       Do not, however, check ports which the kernel knows are being used by
        !           662:       another driver. */
        !           663: 
        !           664:    for (i = 0; i < PORT_COUNT; i++) {
        !           665:       base = ports[i];
        !           666:       if (check_region( base, 0x10 )) {
        !           667: #if DEBUG_DETECT
        !           668:         printk( " (%x inuse),", base );
        !           669: #endif
        !           670:         continue;
        !           671:       }
        !           672: #if DEBUG_DETECT
        !           673:       printk( " %x,", base );
        !           674: #endif
        !           675:       if ((flag = fdomain_is_valid_port( base ))) break;
        !           676:    }
        !           677: 
        !           678:    if (!flag) return 0;                /* iobase not found */
        !           679: 
        !           680:    *irq    = fdomain_get_irq( base );
        !           681:    *iobase = base;
        !           682: 
        !           683:    return 1;                   /* success */
        !           684: }
        !           685: 
        !           686: static int fdomain_pci_nobios_detect( int *irq, int *iobase )
        !           687: {
        !           688:    int i;
        !           689:    int flag = 0;
        !           690: 
        !           691:    /* The proper way of doing this is to use ask the PCI bus for the device
        !           692:       IRQ and interrupt level.  But we can't do that if PCI BIOS32 support
        !           693:       isn't compiled into the kernel, or if a PCI BIOS32 isn't present.
        !           694: 
        !           695:       Instead, we scan down a bunch of addresses (Future Domain tech
        !           696:       support says we will probably find the address before we get to
        !           697:       0xf800).  This works fine on some systems -- other systems may have
        !           698:       to scan more addresses.  If you have to modify this section for your
        !           699:       installation, please send mail to [email protected]. */
        !           700: 
        !           701:    for (i = 0xfff8; i > 0xe000; i -= 8) {
        !           702:       if (check_region( i, 0x10 )) {
        !           703: #if DEBUG_DETECT
        !           704:         printk( " (%x inuse)," , i );
        !           705: #endif
        !           706:         continue;
        !           707:       }
        !           708:       if ((flag = fdomain_is_valid_port( i ))) break;
        !           709:    }
        !           710: 
        !           711:    if (!flag) return 0;                /* iobase not found */
        !           712: 
        !           713:    *irq    = fdomain_get_irq( i );
        !           714:    *iobase = i;
        !           715: 
        !           716:    return 1;                   /* success */
        !           717: }
        !           718: 
        !           719: /* PCI detection function: int fdomain_pci_bios_detect(int* irq, int*
        !           720:    iobase) This function gets the Interrupt Level and I/O base address from
        !           721:    the PCI configuration registers.  The I/O base address is masked with
        !           722:    0xfff8 since on my card the address read from the PCI config registers
        !           723:    is off by one from the actual I/O base address necessary for accessing
        !           724:    the status and control registers on the card (PCI config register gives
        !           725:    0xf801, actual address is 0xf800).  This is likely a bug in the FD
        !           726:    config code that writes to the PCI registers, however using a mask
        !           727:    should be safe since I think the scan done by the card to determine the
        !           728:    I/O base is done in increments of 8 (i.e., 0xf800, 0xf808, ...), at
        !           729:    least the old scan code we used to use to get the I/O base did...  Also,
        !           730:    the device ID from the PCI config registers is 0x0 and should be 0x60e9
        !           731:    as it is in the status registers (offset 5 from I/O base).  If this is
        !           732:    changed in future hardware/BIOS changes it will need to be fixed in this
        !           733:    detection function.  Comments, bug reports, etc... on this function
        !           734:    should be sent to [email protected] - James T. McKinley.  */
        !           735: 
        !           736: #ifdef CONFIG_PCI
        !           737: static int fdomain_pci_bios_detect( int *irq, int *iobase )
        !           738: {
        !           739:    int              error;
        !           740:    unsigned char    pci_bus, pci_dev_fn;    /* PCI bus & device function */
        !           741:    unsigned char    pci_irq;                /* PCI interrupt line */
        !           742:    unsigned int     pci_base;               /* PCI I/O base address */
        !           743:    unsigned short   pci_vendor, pci_device; /* PCI vendor & device IDs */
        !           744: 
        !           745:    /* If the PCI BIOS doesn't exist, use the old-style detection routines.
        !           746:       Otherwise, get the I/O base address and interrupt from the PCI config
        !           747:       registers. */
        !           748:    
        !           749:    if (!pcibios_present()) return fdomain_pci_nobios_detect( irq, iobase );
        !           750: 
        !           751: #if DEBUG_DETECT
        !           752:    /* Tell how to print a list of the known PCI devices from bios32 and
        !           753:       list vendor and device IDs being used if in debug mode.  */
        !           754:       
        !           755:    printk( "\nINFO: cat /proc/pci to see list of PCI devices from bios32\n" );
        !           756:    printk( "\nTMC-3260 detect:"
        !           757:           " Using PCI Vendor ID: 0x%x, PCI Device ID: 0x%x\n",
        !           758:           PCI_VENDOR_ID_FD, 
        !           759:           PCI_DEVICE_ID_FD_36C70 );
        !           760: #endif 
        !           761: 
        !           762:    /* We will have to change this if more than 1 PCI bus is present and the
        !           763:       FD scsi host is not on the first bus (i.e., a PCI to PCI bridge,
        !           764:       which is not supported by bios32 right now anyway).  This should
        !           765:       probably be done by a call to pcibios_find_device but I can't get it
        !           766:       to work...  Also the device ID reported from the PCI config registers
        !           767:       does not match the device ID quoted in the tech manual or available
        !           768:       from offset 5 from the I/O base address.  It should be 0x60E9, but it
        !           769:       is 0x0 if read from the PCI config registers.  I guess the FD folks
        !           770:       neglected to write it to the PCI registers...  This loop is necessary
        !           771:       to get the device function (at least until someone can get
        !           772:       pcibios_find_device to work, I cannot but 53c7,8xx.c uses it...). */
        !           773:     
        !           774:    pci_bus = 0;
        !           775: 
        !           776:    for (pci_dev_fn = 0x0; pci_dev_fn < 0xff; pci_dev_fn++) {
        !           777:       pcibios_read_config_word( pci_bus,
        !           778:                                pci_dev_fn,
        !           779:                                PCI_VENDOR_ID,
        !           780:                                &pci_vendor );
        !           781: 
        !           782:       if (pci_vendor == PCI_VENDOR_ID_FD) {
        !           783:         pcibios_read_config_word( pci_bus,
        !           784:                                   pci_dev_fn,
        !           785:                                   PCI_DEVICE_ID,
        !           786:                                   &pci_device );
        !           787: 
        !           788:         if (pci_device == PCI_DEVICE_ID_FD_36C70) {
        !           789:            /* Break out once we have the correct device.  If other FD
        !           790:               PCI devices are added to this driver we will need to add
        !           791:               an or of the other PCI_DEVICE_ID_FD_XXXXX's here. */
        !           792:            break;
        !           793:         } else {
        !           794:            /* If we can't find an FD scsi card we give up. */
        !           795:            return 0;
        !           796:         }
        !           797:       }
        !           798:    }
        !           799:        
        !           800: #if DEBUG_DETECT
        !           801:    printk( "Future Domain 36C70 : at PCI bus %u, device %u, function %u\n",
        !           802:           pci_bus,
        !           803:           (pci_dev_fn & 0xf8) >> 3, 
        !           804:           pci_dev_fn & 7 );
        !           805: #endif
        !           806: 
        !           807:    /* We now have the appropriate device function for the FD board so we
        !           808:       just read the PCI config info from the registers.  */
        !           809: 
        !           810:    if ((error = pcibios_read_config_dword( pci_bus,
        !           811:                                           pci_dev_fn, 
        !           812:                                           PCI_BASE_ADDRESS_0,
        !           813:                                           &pci_base ))
        !           814:        || (error = pcibios_read_config_byte( pci_bus,
        !           815:                                             pci_dev_fn, 
        !           816:                                             PCI_INTERRUPT_LINE,
        !           817:                                             &pci_irq ))) {
        !           818:       printk ( "PCI ERROR: Future Domain 36C70 not initializing"
        !           819:               " due to error reading configuration space\n" );
        !           820:       return 0;
        !           821:    } else {
        !           822: #if DEBUG_DETECT
        !           823:       printk( "TMC-3260 PCI: IRQ = %u, I/O base = 0x%lx\n", 
        !           824:              pci_irq, pci_base );
        !           825: #endif
        !           826: 
        !           827:       /* Now we have the I/O base address and interrupt from the PCI
        !           828:         configuration registers.  Unfortunately it seems that the I/O base
        !           829:         address is off by one on my card so I mask it with 0xfff8.  This
        !           830:         must be some kind of goof in the FD code that does the autoconfig
        !           831:         and writes to the PCI registers (or maybe I just don't understand
        !           832:         something).  If they fix it in later versions of the card or BIOS
        !           833:         we may have to adjust the address based on the signature or
        !           834:         something...  */
        !           835: 
        !           836:       *irq    = pci_irq;
        !           837:       *iobase = (pci_base & 0xfff8);
        !           838: 
        !           839: #if DEBUG_DETECT
        !           840:       printk( "TMC-3260 fix: Masking I/O base address with 0xff00.\n" ); 
        !           841:       printk( "TMC-3260: IRQ = %d, I/O base = 0x%x\n", *irq, *iobase );
        !           842: #endif
        !           843: 
        !           844:       if (!fdomain_is_valid_port( *iobase )) return 0;
        !           845:       return 1;
        !           846:    }
        !           847:    return 0;
        !           848: }
        !           849: #endif
        !           850: 
        !           851: int fdomain_16x0_detect( Scsi_Host_Template *tpnt )
        !           852: {
        !           853:    int              i, j;
        !           854:    int              retcode;
        !           855:    struct Scsi_Host *shpnt;
        !           856: #if DO_DETECT
        !           857:    const int        buflen = 255;
        !           858:    Scsi_Cmnd        SCinit;
        !           859:    unsigned char    do_inquiry[] =       { INQUIRY, 0, 0, 0, buflen, 0 };
        !           860:    unsigned char    do_request_sense[] = { REQUEST_SENSE, 0, 0, 0, buflen, 0 };
        !           861:    unsigned char    do_read_capacity[] = { READ_CAPACITY,
        !           862:                                           0, 0, 0, 0, 0, 0, 0, 0, 0 };
        !           863:    unsigned char    buf[buflen];
        !           864: #endif
        !           865: 
        !           866: #if DEBUG_DETECT
        !           867:    printk( "fdomain_16x0_detect()," );
        !           868: #endif
        !           869:    tpnt->proc_dir = &proc_scsi_fdomain;
        !           870: 
        !           871:    if (setup_called) {
        !           872: #if DEBUG_DETECT
        !           873:       printk( "no BIOS, using port_base = 0x%x, irq = %d\n",
        !           874:              port_base, interrupt_level );
        !           875: #endif
        !           876:       if (!fdomain_is_valid_port( port_base )) {
        !           877:         printk( "fdomain: cannot locate chip at port base 0x%x\n",
        !           878:                 port_base );
        !           879:         printk( "fdomain: bad LILO parameters?\n" );
        !           880:         return 0;
        !           881:       }
        !           882:    } else {
        !           883:       int flag = 0;
        !           884:       
        !           885:       for (i = 0; !bios_base && i < ADDRESS_COUNT; i++) {
        !           886: #if DEBUG_DETECT
        !           887:         printk( " %x(%x),", (unsigned)addresses[i], (unsigned)bios_base );
        !           888: #endif
        !           889:         for (j = 0; !bios_base && j < SIGNATURE_COUNT; j++) {
        !           890:            if (!memcmp( ((char *)addresses[i] + signatures[j].sig_offset),
        !           891:                         signatures[j].signature, signatures[j].sig_length )) {
        !           892:               bios_major = signatures[j].major_bios_version;
        !           893:               bios_minor = signatures[j].minor_bios_version;
        !           894:               PCI_bus    = (signatures[j].flag == 1);
        !           895:               Quantum    = (signatures[j].flag > 1) ? signatures[j].flag : 0;
        !           896:               bios_base  = addresses[i];
        !           897:            }
        !           898:         }
        !           899:       }
        !           900: 
        !           901:       if (!bios_base) {
        !           902: #if DEBUG_DETECT
        !           903:         printk( " FAILED: NO BIOS\n" );
        !           904: #endif
        !           905:         return 0;
        !           906:       }
        !           907: 
        !           908:       if (!PCI_bus) {
        !           909:         flag = fdomain_isa_detect( &interrupt_level, &port_base );
        !           910:       } else {
        !           911: #ifdef CONFIG_PCI
        !           912:         flag = fdomain_pci_bios_detect( &interrupt_level, &port_base );
        !           913: #else
        !           914:         flag = fdomain_pci_nobios_detect( &interrupt_level, &port_base );
        !           915: #endif
        !           916:       }
        !           917:         
        !           918:       if (!flag) {
        !           919: #if DEBUG_DETECT
        !           920:         printk( " FAILED: NO PORT\n" );
        !           921: #endif
        !           922: #ifdef CONFIG_PCI
        !           923:         printk( "\nTMC-3260 36C70 PCI scsi chip detection failed.\n" );
        !           924:         printk( "Send mail to [email protected].\n" );
        !           925: #endif
        !           926:         return 0;              /* Cannot find valid set of ports */
        !           927:       }
        !           928:    }
        !           929: 
        !           930:    SCSI_Mode_Cntl_port   = port_base + SCSI_Mode_Cntl;
        !           931:    FIFO_Data_Count_port  = port_base + FIFO_Data_Count;
        !           932:    Interrupt_Cntl_port   = port_base + Interrupt_Cntl;
        !           933:    Interrupt_Status_port = port_base + Interrupt_Status;
        !           934:    Read_FIFO_port        = port_base + Read_FIFO;
        !           935:    Read_SCSI_Data_port   = port_base + Read_SCSI_Data;
        !           936:    SCSI_Cntl_port        = port_base + SCSI_Cntl;
        !           937:    SCSI_Data_NoACK_port  = port_base + SCSI_Data_NoACK;
        !           938:    SCSI_Status_port      = port_base + SCSI_Status;
        !           939:    TMC_Cntl_port         = port_base + TMC_Cntl;
        !           940:    TMC_Status_port       = port_base + TMC_Status;
        !           941:    Write_FIFO_port       = port_base + Write_FIFO;
        !           942:    Write_SCSI_Data_port  = port_base + Write_SCSI_Data;
        !           943: 
        !           944:    fdomain_16x0_reset( NULL );
        !           945: 
        !           946:    if (fdomain_test_loopback()) {
        !           947: #if DEBUG_DETECT
        !           948:       printk( "fdomain: LOOPBACK TEST FAILED, FAILING DETECT!\n" );
        !           949: #endif
        !           950:       if (setup_called) {
        !           951:         printk( "fdomain: loopback test failed at port base 0x%x\n",
        !           952:                 port_base );
        !           953:         printk( "fdomain: bad LILO parameters?\n" );
        !           954:       }
        !           955:       return 0;
        !           956:    }
        !           957: 
        !           958:    if (this_id) {
        !           959:       tpnt->this_id = (this_id & 0x07);
        !           960:       adapter_mask  = (1 << tpnt->this_id);
        !           961:    } else {
        !           962:       if ((bios_major == 3 && bios_minor >= 2) || bios_major < 0) {
        !           963:         tpnt->this_id = 7;
        !           964:         adapter_mask  = 0x80;
        !           965:       } else {
        !           966:         tpnt->this_id = 6;
        !           967:         adapter_mask  = 0x40;
        !           968:       }
        !           969:    }
        !           970: 
        !           971:                                /* Print out a banner here in case we can't
        !           972:                                   get resources.  */
        !           973: 
        !           974:    shpnt = scsi_register( tpnt, 0 );
        !           975:    print_banner( shpnt );
        !           976: 
        !           977:                                /* Log IRQ with kernel */   
        !           978:    if (!interrupt_level) {
        !           979:       panic( "fdomain: *NO* interrupt level selected!\n" );
        !           980:    } else {
        !           981:       /* Register the IRQ with the kernel */
        !           982: 
        !           983:       retcode = request_irq( interrupt_level,
        !           984:                             fdomain_16x0_intr, SA_INTERRUPT, "fdomain" );
        !           985: 
        !           986:       if (retcode < 0) {
        !           987:         if (retcode == -EINVAL) {
        !           988:            printk( "fdomain: IRQ %d is bad!\n", interrupt_level );
        !           989:            printk( "         This shouldn't happen!\n" );
        !           990:            printk( "         Send mail to [email protected]\n" );
        !           991:         } else if (retcode == -EBUSY) {
        !           992:            printk( "fdomain: IRQ %d is already in use!\n", interrupt_level );
        !           993:            printk( "         Please use another IRQ!\n" );
        !           994:         } else {
        !           995:            printk( "fdomain: Error getting IRQ %d\n", interrupt_level );
        !           996:            printk( "         This shouldn't happen!\n" );
        !           997:            printk( "         Send mail to [email protected]\n" );
        !           998:         }
        !           999:         panic( "fdomain: Driver requires interruptions\n" );
        !          1000:       }
        !          1001:    }
        !          1002: 
        !          1003:                                /* Log I/O ports with kernel */
        !          1004:    request_region( port_base, 0x10, "fdomain" );
        !          1005: 
        !          1006: #if DO_DETECT
        !          1007: 
        !          1008:    /* These routines are here because of the way the SCSI bus behaves after
        !          1009:       a reset.  This appropriate behavior was not handled correctly by the
        !          1010:       higher level SCSI routines when I first wrote this driver.  Now,
        !          1011:       however, correct scan routines are part of scsi.c and these routines
        !          1012:       are no longer needed.  However, this code is still good for
        !          1013:       debugging.  */
        !          1014: 
        !          1015:    SCinit.request_buffer  = SCinit.buffer = buf;
        !          1016:    SCinit.request_bufflen = SCinit.bufflen = sizeof(buf)-1;
        !          1017:    SCinit.use_sg          = 0;
        !          1018:    SCinit.lun             = 0;
        !          1019: 
        !          1020:    printk( "fdomain: detection routine scanning for devices:\n" );
        !          1021:    for (i = 0; i < 8; i++) {
        !          1022:       SCinit.target = i;
        !          1023:       if (i == tpnt->this_id)  /* Skip host adapter */
        !          1024:            continue;
        !          1025:       memcpy(SCinit.cmnd, do_request_sense, sizeof(do_request_sense));
        !          1026:       retcode = fdomain_16x0_command(&SCinit);
        !          1027:       if (!retcode) {
        !          1028:         memcpy(SCinit.cmnd, do_inquiry, sizeof(do_inquiry));
        !          1029:         retcode = fdomain_16x0_command(&SCinit);
        !          1030:         if (!retcode) {
        !          1031:            printk( "     SCSI ID %d: ", i );
        !          1032:            for (j = 8; j < (buf[4] < 32 ? buf[4] : 32); j++)
        !          1033:                  printk( "%c", buf[j] >= 20 ? buf[j] : ' ' );
        !          1034:            memcpy(SCinit.cmnd, do_read_capacity, sizeof(do_read_capacity));
        !          1035:            retcode = fdomain_16x0_command(&SCinit);
        !          1036:            if (!retcode) {
        !          1037:               unsigned long blocks, size, capacity;
        !          1038:               
        !          1039:               blocks = (buf[0] << 24) | (buf[1] << 16)
        !          1040:                     | (buf[2] << 8) | buf[3];
        !          1041:               size = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7];
        !          1042:               capacity = +( +(blocks / 1024L) * +(size * 10L)) / 1024L;
        !          1043:               
        !          1044:               printk( "%lu MB (%lu byte blocks)",
        !          1045:                       ((capacity + 5L) / 10L), size );
        !          1046:            } else {
        !          1047:               memcpy(SCinit.cmnd, do_request_sense, sizeof(do_request_sense));
        !          1048:               retcode = fdomain_16x0_command(&SCinit);
        !          1049:            }
        !          1050:            printk ("\n" );
        !          1051:         } else {
        !          1052:            memcpy(SCinit.cmnd, do_request_sense, sizeof(do_request_sense));
        !          1053:            retcode = fdomain_16x0_command(&SCinit);
        !          1054:         }
        !          1055:       }
        !          1056:    }
        !          1057: #endif
        !          1058: 
        !          1059:    return 1;                   /* Maximum of one adapter will be detected. */
        !          1060: }
        !          1061: 
        !          1062: const char *fdomain_16x0_info( struct Scsi_Host *ignore )
        !          1063: {
        !          1064:    static char buffer[80];
        !          1065:    char        *pt;
        !          1066:    
        !          1067:    strcpy( buffer, "Future Domain TMC-16x0 SCSI driver, version" );
        !          1068:    if (strchr( VERSION, ':')) { /* Assume VERSION is an RCS Revision string */
        !          1069:       strcat( buffer, strchr( VERSION, ':' ) + 1 );
        !          1070:       pt = strrchr( buffer, '$') - 1;
        !          1071:       if (!pt)                 /* Stripped RCS Revision string? */
        !          1072:            pt = buffer + strlen( buffer ) - 1;
        !          1073:       if (*pt != ' ')
        !          1074:            ++pt;
        !          1075:       *pt = '\0';
        !          1076:    } else {                    /* Assume VERSION is a number */
        !          1077:       strcat( buffer, " " VERSION );
        !          1078:    }
        !          1079:       
        !          1080:    return buffer;
        !          1081: }
        !          1082: 
        !          1083:                                /* First pass at /proc information routine. */
        !          1084: /*
        !          1085:  * inout : decides on the direction of the dataflow and the meaning of the 
        !          1086:  *         variables
        !          1087:  * buffer: If inout==FALSE data is beeing written to it else read from it
        !          1088:  * *start: If inout==FALSE start of the valid data in the buffer
        !          1089:  * offset: If inout==FALSE offset from the beginning of the imaginary file 
        !          1090:  *         from which we start writing into the buffer
        !          1091:  * length: If inout==FALSE max number of bytes to be written into the buffer 
        !          1092:  *         else number of bytes in the buffer
        !          1093:  */
        !          1094: int fdomain_16x0_proc_info( char *buffer, char **start, off_t offset,
        !          1095:                            int length, int hostno, int inout )
        !          1096: {
        !          1097:    const char *info = fdomain_16x0_info( NULL );
        !          1098:    int        len;
        !          1099:    int        pos;
        !          1100:    int        begin;
        !          1101: 
        !          1102:    if (inout) return(-ENOSYS);
        !          1103:     
        !          1104:    begin = 0;
        !          1105:    strcpy( buffer, info );
        !          1106:    strcat( buffer, "\n" );
        !          1107: 
        !          1108:    pos = len = strlen( buffer );
        !          1109: 
        !          1110:    if(pos < offset) {
        !          1111:       len = 0;
        !          1112:       begin = pos;
        !          1113:    }
        !          1114:     
        !          1115:    *start = buffer + (offset - begin);   /* Start of wanted data */
        !          1116:    len -= (offset - begin);
        !          1117:    if(len > length) len = length;
        !          1118:    
        !          1119:    return(len);
        !          1120: }
        !          1121:    
        !          1122: #if 0
        !          1123: static int fdomain_arbitrate( void )
        !          1124: {
        !          1125:    int           status = 0;
        !          1126:    unsigned long timeout;
        !          1127: 
        !          1128: #if EVERY_ACCESS
        !          1129:    printk( "fdomain_arbitrate()\n" );
        !          1130: #endif
        !          1131:    
        !          1132:    outb( 0x00, SCSI_Cntl_port );              /* Disable data drivers */
        !          1133:    outb( adapter_mask, port_base + SCSI_Data_NoACK ); /* Set our id bit */
        !          1134:    outb( 0x04 | PARITY_MASK, TMC_Cntl_port ); /* Start arbitration */
        !          1135: 
        !          1136:    timeout = jiffies + 50;                   /* 500 mS */
        !          1137:    while (jiffies < timeout) {
        !          1138:       status = inb( TMC_Status_port );        /* Read adapter status */
        !          1139:       if (status & 0x02)                     /* Arbitration complete */
        !          1140:            return 0;   
        !          1141:    }
        !          1142: 
        !          1143:    /* Make bus idle */
        !          1144:    fdomain_make_bus_idle();
        !          1145: 
        !          1146: #if EVERY_ACCESS
        !          1147:    printk( "Arbitration failed, status = %x\n", status );
        !          1148: #endif
        !          1149: #if ERRORS_ONLY
        !          1150:    printk( "fdomain: Arbitration failed, status = %x\n", status );
        !          1151: #endif
        !          1152:    return 1;
        !          1153: }
        !          1154: #endif
        !          1155: 
        !          1156: static int fdomain_select( int target )
        !          1157: {
        !          1158:    int           status;
        !          1159:    unsigned long timeout;
        !          1160:    static int    flag = 0;
        !          1161: 
        !          1162: 
        !          1163:    outb( 0x82, SCSI_Cntl_port ); /* Bus Enable + Select */
        !          1164:    outb( adapter_mask | (1 << target), SCSI_Data_NoACK_port );
        !          1165: 
        !          1166:    /* Stop arbitration and enable parity */
        !          1167:    outb( PARITY_MASK, TMC_Cntl_port ); 
        !          1168: 
        !          1169:    timeout = jiffies + 35;             /* 350mS -- because of timeouts
        !          1170:                                           (was 250mS) */
        !          1171: 
        !          1172:    while (jiffies < timeout) {
        !          1173:       status = inb( SCSI_Status_port ); /* Read adapter status */
        !          1174:       if (status & 1) {                        /* Busy asserted */
        !          1175:         /* Enable SCSI Bus (on error, should make bus idle with 0) */
        !          1176:         outb( 0x80, SCSI_Cntl_port );
        !          1177:         return 0;
        !          1178:       }
        !          1179:    }
        !          1180:    /* Make bus idle */
        !          1181:    fdomain_make_bus_idle();
        !          1182: #if EVERY_ACCESS
        !          1183:    if (!target) printk( "Selection failed\n" );
        !          1184: #endif
        !          1185: #if ERRORS_ONLY
        !          1186:    if (!target) {
        !          1187:       if (chip == tmc18c30 && !flag) /* Skip first failure for 18C30 chips. */
        !          1188:            ++flag;
        !          1189:       else
        !          1190:            printk( "fdomain: Selection failed\n" );
        !          1191:    }
        !          1192: #endif
        !          1193:    return 1;
        !          1194: }
        !          1195: 
        !          1196: void my_done( int error )
        !          1197: {
        !          1198:    if (in_command) {
        !          1199:       in_command = 0;
        !          1200:       outb( 0x00, Interrupt_Cntl_port );
        !          1201:       fdomain_make_bus_idle();
        !          1202:       current_SC->result = error;
        !          1203:       if (current_SC->scsi_done)
        !          1204:            current_SC->scsi_done( current_SC );
        !          1205:       else panic( "fdomain: current_SC->scsi_done() == NULL" );
        !          1206:    } else {
        !          1207:       panic( "fdomain: my_done() called outside of command\n" );
        !          1208:    }
        !          1209: #if DEBUG_RACE
        !          1210:    in_interrupt_flag = 0;
        !          1211: #endif
        !          1212: }
        !          1213: 
        !          1214: void fdomain_16x0_intr( int irq, struct pt_regs * regs )
        !          1215: {
        !          1216:    int      status;
        !          1217:    int      done = 0;
        !          1218:    unsigned data_count;
        !          1219: 
        !          1220:                                /* The fdomain_16x0_intr is only called via
        !          1221:                                   the interrupt handler.  The goal of the
        !          1222:                                   sti() here is to allow other
        !          1223:                                   interruptions while this routine is
        !          1224:                                   running. */
        !          1225: 
        !          1226:    sti();                      /* Yes, we really want sti() here */
        !          1227:    
        !          1228:    outb( 0x00, Interrupt_Cntl_port );
        !          1229: 
        !          1230:    /* We usually have one spurious interrupt after each command.  Ignore it. */
        !          1231:    if (!in_command || !current_SC) {   /* Spurious interrupt */
        !          1232: #if EVERY_ACCESS
        !          1233:       printk( "Spurious interrupt, in_command = %d, current_SC = %x\n",
        !          1234:              in_command, current_SC );
        !          1235: #endif
        !          1236:       return;
        !          1237:    }
        !          1238: 
        !          1239:    /* Abort calls my_done, so we do nothing here. */
        !          1240:    if (current_SC->SCp.phase & aborted) {
        !          1241: #if DEBUG_ABORT
        !          1242:       printk( "Interrupt after abort, ignoring\n" );
        !          1243: #endif
        !          1244:       /*
        !          1245:       return; */
        !          1246:    }
        !          1247: 
        !          1248: #if DEBUG_RACE
        !          1249:    ++in_interrupt_flag;
        !          1250: #endif
        !          1251: 
        !          1252:    if (current_SC->SCp.phase & in_arbitration) {
        !          1253:       status = inb( TMC_Status_port );        /* Read adapter status */
        !          1254:       if (!(status & 0x02)) {
        !          1255: #if EVERY_ACCESS
        !          1256:         printk( " AFAIL " );
        !          1257: #endif
        !          1258:         my_done( DID_BUS_BUSY << 16 );
        !          1259:         return;
        !          1260:       }
        !          1261:       current_SC->SCp.phase = in_selection;
        !          1262:       
        !          1263:       outb( 0x40 | FIFO_COUNT, Interrupt_Cntl_port );
        !          1264: 
        !          1265:       outb( 0x82, SCSI_Cntl_port ); /* Bus Enable + Select */
        !          1266:       outb( adapter_mask | (1 << current_SC->target), SCSI_Data_NoACK_port );
        !          1267:       
        !          1268:       /* Stop arbitration and enable parity */
        !          1269:       outb( 0x10 | PARITY_MASK, TMC_Cntl_port );
        !          1270: #if DEBUG_RACE
        !          1271:       in_interrupt_flag = 0;
        !          1272: #endif
        !          1273:       return;
        !          1274:    } else if (current_SC->SCp.phase & in_selection) {
        !          1275:       status = inb( SCSI_Status_port );
        !          1276:       if (!(status & 0x01)) {
        !          1277:         /* Try again, for slow devices */
        !          1278:         if (fdomain_select( current_SC->target )) {
        !          1279: #if EVERY_ACCESS
        !          1280:            printk( " SFAIL " );
        !          1281: #endif
        !          1282:            my_done( DID_NO_CONNECT << 16 );
        !          1283:            return;
        !          1284:         } else {
        !          1285: #if EVERY_ACCESS
        !          1286:            printk( " AltSel " );
        !          1287: #endif
        !          1288:            /* Stop arbitration and enable parity */
        !          1289:            outb( 0x10 | PARITY_MASK, TMC_Cntl_port );
        !          1290:         }
        !          1291:       }
        !          1292:       current_SC->SCp.phase = in_other;
        !          1293:       outb( 0x90 | FIFO_COUNT, Interrupt_Cntl_port );
        !          1294:       outb( 0x80, SCSI_Cntl_port );
        !          1295: #if DEBUG_RACE
        !          1296:       in_interrupt_flag = 0;
        !          1297: #endif
        !          1298:       return;
        !          1299:    }
        !          1300:    
        !          1301:    /* current_SC->SCp.phase == in_other: this is the body of the routine */
        !          1302:    
        !          1303:    status = inb( SCSI_Status_port );
        !          1304:    
        !          1305:    if (status & 0x10) {        /* REQ */
        !          1306:       
        !          1307:       switch (status & 0x0e) {
        !          1308:        
        !          1309:       case 0x08:               /* COMMAND OUT */
        !          1310:         outb( current_SC->cmnd[current_SC->SCp.sent_command++],
        !          1311:               Write_SCSI_Data_port );
        !          1312: #if EVERY_ACCESS
        !          1313:         printk( "CMD = %x,",
        !          1314:                 current_SC->cmnd[ current_SC->SCp.sent_command - 1] );
        !          1315: #endif
        !          1316:         break;
        !          1317:       case 0x00:               /* DATA OUT -- tmc18c50/tmc18c30 only */
        !          1318:         if (chip != tmc1800 && !current_SC->SCp.have_data_in) {
        !          1319:            current_SC->SCp.have_data_in = -1;
        !          1320:            outb( 0xd0 | PARITY_MASK, TMC_Cntl_port );
        !          1321:         }
        !          1322:         break;
        !          1323:       case 0x04:               /* DATA IN -- tmc18c50/tmc18c30 only */
        !          1324:         if (chip != tmc1800 && !current_SC->SCp.have_data_in) {
        !          1325:            current_SC->SCp.have_data_in = 1;
        !          1326:            outb( 0x90 | PARITY_MASK, TMC_Cntl_port );
        !          1327:         }
        !          1328:         break;
        !          1329:       case 0x0c:               /* STATUS IN */
        !          1330:         current_SC->SCp.Status = inb( Read_SCSI_Data_port );
        !          1331: #if EVERY_ACCESS
        !          1332:         printk( "Status = %x, ", current_SC->SCp.Status );
        !          1333: #endif
        !          1334: #if ERRORS_ONLY
        !          1335:         if (current_SC->SCp.Status && current_SC->SCp.Status != 2) {
        !          1336:            printk( "fdomain: target = %d, command = %x, status = %x\n",
        !          1337:                    current_SC->target,
        !          1338:                    current_SC->cmnd[0],
        !          1339:                    current_SC->SCp.Status );
        !          1340:         }
        !          1341: #endif
        !          1342:               break;
        !          1343:       case 0x0a:               /* MESSAGE OUT */
        !          1344:         outb( MESSAGE_REJECT, Write_SCSI_Data_port ); /* Reject */
        !          1345:         break;
        !          1346:       case 0x0e:               /* MESSAGE IN */
        !          1347:         current_SC->SCp.Message = inb( Read_SCSI_Data_port );
        !          1348: #if EVERY_ACCESS
        !          1349:         printk( "Message = %x, ", current_SC->SCp.Message );
        !          1350: #endif
        !          1351:         if (!current_SC->SCp.Message) ++done;
        !          1352: #if DEBUG_MESSAGES || EVERY_ACCESS
        !          1353:         if (current_SC->SCp.Message) {
        !          1354:            printk( "fdomain: message = %x\n", current_SC->SCp.Message );
        !          1355:         }
        !          1356: #endif
        !          1357:         break;
        !          1358:       }
        !          1359:    }
        !          1360: 
        !          1361:    if (chip == tmc1800
        !          1362:        && !current_SC->SCp.have_data_in
        !          1363:        && (current_SC->SCp.sent_command
        !          1364:           >= current_SC->cmd_len)) {
        !          1365:                                /* We have to get the FIFO direction
        !          1366:                                   correct, so I've made a table based
        !          1367:                                   on the SCSI Standard of which commands
        !          1368:                                   appear to require a DATA OUT phase.
        !          1369:                                 */
        !          1370:       /*
        !          1371:        p. 94: Command for all device types
        !          1372:        CHANGE DEFINITION            40 DATA OUT
        !          1373:        COMPARE                      39 DATA OUT
        !          1374:        COPY                         18 DATA OUT
        !          1375:        COPY AND VERIFY              3a DATA OUT
        !          1376:        INQUIRY                      12 
        !          1377:        LOG SELECT                   4c DATA OUT
        !          1378:        LOG SENSE                    4d
        !          1379:        MODE SELECT (6)              15 DATA OUT
        !          1380:        MODE SELECT (10)             55 DATA OUT
        !          1381:        MODE SENSE (6)               1a
        !          1382:        MODE SENSE (10)              5a
        !          1383:        READ BUFFER                  3c
        !          1384:        RECEIVE DIAGNOSTIC RESULTS   1c
        !          1385:        REQUEST SENSE                03
        !          1386:        SEND DIAGNOSTIC              1d DATA OUT
        !          1387:        TEST UNIT READY              00
        !          1388:        WRITE BUFFER                 3b DATA OUT
        !          1389: 
        !          1390:        p.178: Commands for direct-access devices (not listed on p. 94)
        !          1391:        FORMAT UNIT                  04 DATA OUT
        !          1392:        LOCK-UNLOCK CACHE            36
        !          1393:        PRE-FETCH                    34
        !          1394:        PREVENT-ALLOW MEDIUM REMOVAL 1e
        !          1395:        READ (6)/RECEIVE             08
        !          1396:        READ (10)                    3c
        !          1397:        READ CAPACITY                25
        !          1398:        READ DEFECT DATA (10)        37
        !          1399:        READ LONG                    3e
        !          1400:        REASSIGN BLOCKS              07 DATA OUT
        !          1401:        RELEASE                      17
        !          1402:        RESERVE                      16 DATA OUT
        !          1403:        REZERO UNIT/REWIND           01
        !          1404:        SEARCH DATA EQUAL (10)       31 DATA OUT
        !          1405:        SEARCH DATA HIGH (10)        30 DATA OUT
        !          1406:        SEARCH DATA LOW (10)         32 DATA OUT
        !          1407:        SEEK (6)                     0b
        !          1408:        SEEK (10)                    2b
        !          1409:        SET LIMITS (10)              33
        !          1410:        START STOP UNIT              1b
        !          1411:        SYNCHRONIZE CACHE            35
        !          1412:        VERIFY (10)                  2f
        !          1413:        WRITE (6)/PRINT/SEND         0a DATA OUT
        !          1414:        WRITE (10)/SEND              2a DATA OUT
        !          1415:        WRITE AND VERIFY (10)        2e DATA OUT
        !          1416:        WRITE LONG                   3f DATA OUT
        !          1417:        WRITE SAME                   41 DATA OUT ?
        !          1418: 
        !          1419:        p. 261: Commands for sequential-access devices (not previously listed)
        !          1420:        ERASE                        19
        !          1421:        LOAD UNLOAD                  1b
        !          1422:        LOCATE                       2b
        !          1423:        READ BLOCK LIMITS            05
        !          1424:        READ POSITION                34
        !          1425:        READ REVERSE                 0f
        !          1426:        RECOVER BUFFERED DATA        14
        !          1427:        SPACE                        11
        !          1428:        WRITE FILEMARKS              10 ?
        !          1429: 
        !          1430:        p. 298: Commands for printer devices (not previously listed)
        !          1431:        ****** NOT SUPPORTED BY THIS DRIVER, since 0b is SEEK (6) *****
        !          1432:        SLEW AND PRINT               0b DATA OUT  -- same as seek
        !          1433:        STOP PRINT                   1b
        !          1434:        SYNCHRONIZE BUFFER           10
        !          1435: 
        !          1436:        p. 315: Commands for processor devices (not previously listed)
        !          1437:        
        !          1438:        p. 321: Commands for write-once devices (not previously listed)
        !          1439:        MEDIUM SCAN                  38
        !          1440:        READ (12)                    a8
        !          1441:        SEARCH DATA EQUAL (12)       b1 DATA OUT
        !          1442:        SEARCH DATA HIGH (12)        b0 DATA OUT
        !          1443:        SEARCH DATA LOW (12)         b2 DATA OUT
        !          1444:        SET LIMITS (12)              b3
        !          1445:        VERIFY (12)                  af
        !          1446:        WRITE (12)                   aa DATA OUT
        !          1447:        WRITE AND VERIFY (12)        ae DATA OUT
        !          1448: 
        !          1449:        p. 332: Commands for CD-ROM devices (not previously listed)
        !          1450:        PAUSE/RESUME                 4b
        !          1451:        PLAY AUDIO (10)              45
        !          1452:        PLAY AUDIO (12)              a5
        !          1453:        PLAY AUDIO MSF               47
        !          1454:        PLAY TRACK RELATIVE (10)     49
        !          1455:        PLAY TRACK RELATIVE (12)     a9
        !          1456:        READ HEADER                  44
        !          1457:        READ SUB-CHANNEL             42
        !          1458:        READ TOC                     43
        !          1459: 
        !          1460:        p. 370: Commands for scanner devices (not previously listed)
        !          1461:        GET DATA BUFFER STATUS       34
        !          1462:        GET WINDOW                   25
        !          1463:        OBJECT POSITION              31
        !          1464:        SCAN                         1b
        !          1465:        SET WINDOW                   24 DATA OUT
        !          1466: 
        !          1467:        p. 391: Commands for optical memory devices (not listed)
        !          1468:        ERASE (10)                   2c
        !          1469:        ERASE (12)                   ac
        !          1470:        MEDIUM SCAN                  38 DATA OUT
        !          1471:        READ DEFECT DATA (12)        b7
        !          1472:        READ GENERATION              29
        !          1473:        READ UPDATED BLOCK           2d
        !          1474:        UPDATE BLOCK                 3d DATA OUT
        !          1475: 
        !          1476:        p. 419: Commands for medium changer devices (not listed)
        !          1477:        EXCHANGE MEDIUM              46
        !          1478:        INITIALIZE ELEMENT STATUS    07
        !          1479:        MOVE MEDIUM                  a5
        !          1480:        POSITION TO ELEMENT          2b
        !          1481:        READ ELEMENT STATUS          b8
        !          1482:        REQUEST VOL. ELEMENT ADDRESS b5
        !          1483:        SEND VOLUME TAG              b6 DATA OUT
        !          1484: 
        !          1485:        p. 454: Commands for communications devices (not listed previously)
        !          1486:        GET MESSAGE (6)              08
        !          1487:        GET MESSAGE (10)             28
        !          1488:        GET MESSAGE (12)             a8
        !          1489:       */
        !          1490:        
        !          1491:       switch (current_SC->cmnd[0]) {
        !          1492:       case CHANGE_DEFINITION: case COMPARE:         case COPY:
        !          1493:       case COPY_VERIFY:       case LOG_SELECT:      case MODE_SELECT:
        !          1494:       case MODE_SELECT_10:    case SEND_DIAGNOSTIC: case WRITE_BUFFER:
        !          1495: 
        !          1496:       case FORMAT_UNIT:       case REASSIGN_BLOCKS: case RESERVE:
        !          1497:       case SEARCH_EQUAL:      case SEARCH_HIGH:     case SEARCH_LOW:
        !          1498:       case WRITE_6:           case WRITE_10:        case WRITE_VERIFY:
        !          1499:       case 0x3f:              case 0x41:
        !          1500: 
        !          1501:       case 0xb1:              case 0xb0:            case 0xb2:
        !          1502:       case 0xaa:              case 0xae:
        !          1503: 
        !          1504:       case 0x24:
        !          1505: 
        !          1506:       case 0x38:              case 0x3d:
        !          1507: 
        !          1508:       case 0xb6:
        !          1509:         
        !          1510:       case 0xea:               /* alternate number for WRITE LONG */
        !          1511:         
        !          1512:         current_SC->SCp.have_data_in = -1;
        !          1513:         outb( 0xd0 | PARITY_MASK, TMC_Cntl_port );
        !          1514:         break;
        !          1515: 
        !          1516:       case 0x00:
        !          1517:       default:
        !          1518:         
        !          1519:         current_SC->SCp.have_data_in = 1;
        !          1520:         outb( 0x90 | PARITY_MASK, TMC_Cntl_port );
        !          1521:         break;
        !          1522:       }
        !          1523:    }
        !          1524: 
        !          1525:    if (current_SC->SCp.have_data_in == -1) { /* DATA OUT */
        !          1526:       while ( (data_count = FIFO_Size - inw( FIFO_Data_Count_port )) > 512 ) {
        !          1527: #if EVERY_ACCESS
        !          1528:         printk( "DC=%d, ", data_count ) ;
        !          1529: #endif
        !          1530:         if (data_count > current_SC->SCp.this_residual)
        !          1531:               data_count = current_SC->SCp.this_residual;
        !          1532:         if (data_count > 0) {
        !          1533: #if EVERY_ACCESS
        !          1534:            printk( "%d OUT, ", data_count );
        !          1535: #endif
        !          1536:            if (data_count == 1) {
        !          1537:               outb( *current_SC->SCp.ptr++, Write_FIFO_port );
        !          1538:               --current_SC->SCp.this_residual;
        !          1539:            } else {
        !          1540:               data_count >>= 1;
        !          1541:               outsw( Write_FIFO_port, current_SC->SCp.ptr, data_count );
        !          1542:               current_SC->SCp.ptr += 2 * data_count;
        !          1543:               current_SC->SCp.this_residual -= 2 * data_count;
        !          1544:            }
        !          1545:         }
        !          1546:         if (!current_SC->SCp.this_residual) {
        !          1547:            if (current_SC->SCp.buffers_residual) {
        !          1548:               --current_SC->SCp.buffers_residual;
        !          1549:               ++current_SC->SCp.buffer;
        !          1550:               current_SC->SCp.ptr = current_SC->SCp.buffer->address;
        !          1551:               current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
        !          1552:            } else
        !          1553:                  break;
        !          1554:         }
        !          1555:       }
        !          1556:    }
        !          1557:    
        !          1558:    if (current_SC->SCp.have_data_in == 1) { /* DATA IN */
        !          1559:       while ((data_count = inw( FIFO_Data_Count_port )) > 0) {
        !          1560: #if EVERY_ACCESS
        !          1561:         printk( "DC=%d, ", data_count );
        !          1562: #endif
        !          1563:         if (data_count > current_SC->SCp.this_residual)
        !          1564:               data_count = current_SC->SCp.this_residual;
        !          1565:         if (data_count) {
        !          1566: #if EVERY_ACCESS
        !          1567:            printk( "%d IN, ", data_count );
        !          1568: #endif
        !          1569:            if (data_count == 1) {
        !          1570:               *current_SC->SCp.ptr++ = inb( Read_FIFO_port );
        !          1571:               --current_SC->SCp.this_residual;
        !          1572:            } else {
        !          1573:               data_count >>= 1; /* Number of words */
        !          1574:               insw( Read_FIFO_port, current_SC->SCp.ptr, data_count );
        !          1575:               current_SC->SCp.ptr += 2 * data_count;
        !          1576:               current_SC->SCp.this_residual -= 2 * data_count;
        !          1577:            }
        !          1578:         }
        !          1579:         if (!current_SC->SCp.this_residual
        !          1580:             && current_SC->SCp.buffers_residual) {
        !          1581:            --current_SC->SCp.buffers_residual;
        !          1582:            ++current_SC->SCp.buffer;
        !          1583:            current_SC->SCp.ptr = current_SC->SCp.buffer->address;
        !          1584:            current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
        !          1585:         }
        !          1586:       }
        !          1587:    }
        !          1588:    
        !          1589:    if (done) {
        !          1590: #if EVERY_ACCESS
        !          1591:       printk( " ** IN DONE %d ** ", current_SC->SCp.have_data_in );
        !          1592: #endif
        !          1593: 
        !          1594: #if ERRORS_ONLY
        !          1595:       if (current_SC->cmnd[0] == REQUEST_SENSE && !current_SC->SCp.Status) {
        !          1596:         if ((unsigned char)(*((char *)current_SC->request_buffer+2)) & 0x0f) {
        !          1597:            unsigned char key;
        !          1598:            unsigned char code;
        !          1599:            unsigned char qualifier;
        !          1600: 
        !          1601:            key = (unsigned char)(*((char *)current_SC->request_buffer + 2))
        !          1602:                  & 0x0f;
        !          1603:            code = (unsigned char)(*((char *)current_SC->request_buffer + 12));
        !          1604:            qualifier = (unsigned char)(*((char *)current_SC->request_buffer
        !          1605:                                          + 13));
        !          1606: 
        !          1607:            if (!(key == UNIT_ATTENTION && (code == 0x29 || !code))
        !          1608:                && !(key == NOT_READY
        !          1609:                     && code == 0x04
        !          1610:                     && (!qualifier || qualifier == 0x02 || qualifier == 0x01))
        !          1611:                && !(key == ILLEGAL_REQUEST && (code == 0x25
        !          1612:                                                || code == 0x24
        !          1613:                                                || !code)))
        !          1614:                  
        !          1615:                  printk( "fdomain: REQUEST SENSE "
        !          1616:                          "Key = %x, Code = %x, Qualifier = %x\n",
        !          1617:                          key, code, qualifier );
        !          1618:         }
        !          1619:       }
        !          1620: #endif
        !          1621: #if EVERY_ACCESS
        !          1622:       printk( "BEFORE MY_DONE. . ." );
        !          1623: #endif
        !          1624:       my_done( (current_SC->SCp.Status & 0xff)
        !          1625:               | ((current_SC->SCp.Message & 0xff) << 8) | (DID_OK << 16) );
        !          1626: #if EVERY_ACCESS
        !          1627:       printk( "RETURNING.\n" );
        !          1628: #endif
        !          1629:       
        !          1630:    } else {
        !          1631:       if (current_SC->SCp.phase & disconnect) {
        !          1632:         outb( 0xd0 | FIFO_COUNT, Interrupt_Cntl_port );
        !          1633:         outb( 0x00, SCSI_Cntl_port );
        !          1634:       } else {
        !          1635:         outb( 0x90 | FIFO_COUNT, Interrupt_Cntl_port );
        !          1636:       }
        !          1637:    }
        !          1638: #if DEBUG_RACE
        !          1639:    in_interrupt_flag = 0;
        !          1640: #endif
        !          1641:    return;
        !          1642: }
        !          1643: 
        !          1644: int fdomain_16x0_queue( Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
        !          1645: {
        !          1646:    if (in_command) {
        !          1647:       panic( "fdomain: fdomain_16x0_queue() NOT REENTRANT!\n" );
        !          1648:    }
        !          1649: #if EVERY_ACCESS
        !          1650:    printk( "queue: target = %d cmnd = 0x%02x pieces = %d size = %u\n",
        !          1651:           SCpnt->target,
        !          1652:           *(unsigned char *)SCpnt->cmnd,
        !          1653:           SCpnt->use_sg,
        !          1654:           SCpnt->request_bufflen );
        !          1655: #endif
        !          1656: 
        !          1657:    fdomain_make_bus_idle();
        !          1658: 
        !          1659:    current_SC            = SCpnt; /* Save this for the done function */
        !          1660:    current_SC->scsi_done = done;
        !          1661: 
        !          1662:    /* Initialize static data */
        !          1663: 
        !          1664:    if (current_SC->use_sg) {
        !          1665:       current_SC->SCp.buffer =
        !          1666:            (struct scatterlist *)current_SC->request_buffer;
        !          1667:       current_SC->SCp.ptr              = current_SC->SCp.buffer->address;
        !          1668:       current_SC->SCp.this_residual    = current_SC->SCp.buffer->length;
        !          1669:       current_SC->SCp.buffers_residual = current_SC->use_sg - 1;
        !          1670:    } else {
        !          1671:       current_SC->SCp.ptr              = (char *)current_SC->request_buffer;
        !          1672:       current_SC->SCp.this_residual    = current_SC->request_bufflen;
        !          1673:       current_SC->SCp.buffer           = NULL;
        !          1674:       current_SC->SCp.buffers_residual = 0;
        !          1675:    }
        !          1676:         
        !          1677:    
        !          1678:    current_SC->SCp.Status              = 0;
        !          1679:    current_SC->SCp.Message             = 0;
        !          1680:    current_SC->SCp.have_data_in        = 0;
        !          1681:    current_SC->SCp.sent_command        = 0;
        !          1682:    current_SC->SCp.phase               = in_arbitration;
        !          1683: 
        !          1684:    /* Start arbitration */
        !          1685:    outb( 0x00, Interrupt_Cntl_port );
        !          1686:    outb( 0x00, SCSI_Cntl_port );              /* Disable data drivers */
        !          1687:    outb( adapter_mask, SCSI_Data_NoACK_port ); /* Set our id bit */
        !          1688:    ++in_command;
        !          1689:    outb( 0x20, Interrupt_Cntl_port );
        !          1690:    outb( 0x14 | PARITY_MASK, TMC_Cntl_port ); /* Start arbitration */
        !          1691: 
        !          1692:    return 0;
        !          1693: }
        !          1694: 
        !          1695: /* The following code, which simulates the old-style command function, was
        !          1696:    taken from Tommy Thorn's aha1542.c file.  This code is Copyright (C)
        !          1697:    1992 Tommy Thorn. */
        !          1698: 
        !          1699: static volatile int internal_done_flag    = 0;
        !          1700: static volatile int internal_done_errcode = 0;
        !          1701: 
        !          1702: static void internal_done( Scsi_Cmnd *SCpnt )
        !          1703: {
        !          1704:     internal_done_errcode = SCpnt->result;
        !          1705:     ++internal_done_flag;
        !          1706: }
        !          1707: 
        !          1708: int fdomain_16x0_command( Scsi_Cmnd *SCpnt )
        !          1709: {
        !          1710:     fdomain_16x0_queue( SCpnt, internal_done );
        !          1711: 
        !          1712:     while (!internal_done_flag)
        !          1713:          ;
        !          1714:     internal_done_flag = 0;
        !          1715:     return internal_done_errcode;
        !          1716: }
        !          1717: 
        !          1718: /* End of code derived from Tommy Thorn's work. */
        !          1719: 
        !          1720: void print_info( Scsi_Cmnd *SCpnt )
        !          1721: {
        !          1722:    unsigned int imr;
        !          1723:    unsigned int irr;
        !          1724:    unsigned int isr;
        !          1725: 
        !          1726:    if (!SCpnt || !SCpnt->host) {
        !          1727:       printk( "fdomain: cannot provide detailed information\n" );
        !          1728:    }
        !          1729:    
        !          1730:    printk( "%s\n", fdomain_16x0_info( SCpnt->host ) );
        !          1731:    print_banner( SCpnt->host );
        !          1732:    switch (SCpnt->SCp.phase) {
        !          1733:    case in_arbitration: printk( "arbitration " ); break;
        !          1734:    case in_selection:   printk( "selection " );   break;
        !          1735:    case in_other:       printk( "other " );       break;
        !          1736:    default:             printk( "unknown " );     break;
        !          1737:    }
        !          1738: 
        !          1739:    printk( "(%d), target = %d cmnd = 0x%02x pieces = %d size = %u\n",
        !          1740:           SCpnt->SCp.phase,
        !          1741:           SCpnt->target,
        !          1742:           *(unsigned char *)SCpnt->cmnd,
        !          1743:           SCpnt->use_sg,
        !          1744:           SCpnt->request_bufflen );
        !          1745:    printk( "sent_command = %d, have_data_in = %d, timeout = %d\n",
        !          1746:           SCpnt->SCp.sent_command,
        !          1747:           SCpnt->SCp.have_data_in,
        !          1748:           SCpnt->timeout );
        !          1749: #if DEBUG_RACE
        !          1750:    printk( "in_interrupt_flag = %d\n", in_interrupt_flag );
        !          1751: #endif
        !          1752: 
        !          1753:    imr = (inb( 0x0a1 ) << 8) + inb( 0x21 );
        !          1754:    outb( 0x0a, 0xa0 );
        !          1755:    irr = inb( 0xa0 ) << 8;
        !          1756:    outb( 0x0a, 0x20 );
        !          1757:    irr += inb( 0x20 );
        !          1758:    outb( 0x0b, 0xa0 );
        !          1759:    isr = inb( 0xa0 ) << 8;
        !          1760:    outb( 0x0b, 0x20 );
        !          1761:    isr += inb( 0x20 );
        !          1762: 
        !          1763:                                /* Print out interesting information */
        !          1764:    printk( "IMR = 0x%04x", imr );
        !          1765:    if (imr & (1 << interrupt_level))
        !          1766:         printk( " (masked)" );
        !          1767:    printk( ", IRR = 0x%04x, ISR = 0x%04x\n", irr, isr );
        !          1768: 
        !          1769:    printk( "SCSI Status      = 0x%02x\n", inb( SCSI_Status_port ) );
        !          1770:    printk( "TMC Status       = 0x%02x", inb( TMC_Status_port ) );
        !          1771:    if (inb( TMC_Status_port & 1))
        !          1772:         printk( " (interrupt)" );
        !          1773:    printk( "\n" );
        !          1774:    printk( "Interrupt Status = 0x%02x", inb( Interrupt_Status_port ) );
        !          1775:    if (inb( Interrupt_Status_port ) & 0x08)
        !          1776:         printk( " (enabled)" );
        !          1777:    printk( "\n" );
        !          1778:    if (chip == tmc18c50 || chip == tmc18c30) {
        !          1779:       printk( "FIFO Status      = 0x%02x\n", inb( port_base + FIFO_Status ) );
        !          1780:       printk( "Int. Condition   = 0x%02x\n",
        !          1781:              inb( port_base + Interrupt_Cond ) );
        !          1782:    }
        !          1783:    printk( "Configuration 1  = 0x%02x\n", inb( port_base + Configuration1 ) );
        !          1784:    if (chip == tmc18c50 || chip == tmc18c30)
        !          1785:         printk( "Configuration 2  = 0x%02x\n",
        !          1786:                 inb( port_base + Configuration2 ) );
        !          1787: }
        !          1788: 
        !          1789: int fdomain_16x0_abort( Scsi_Cmnd *SCpnt)
        !          1790: {
        !          1791:    unsigned long flags;
        !          1792: #if EVERY_ACCESS || ERRORS_ONLY || DEBUG_ABORT
        !          1793:    printk( "fdomain: abort " );
        !          1794: #endif
        !          1795: 
        !          1796:    save_flags( flags );
        !          1797:    cli();
        !          1798:    if (!in_command) {
        !          1799: #if EVERY_ACCESS || ERRORS_ONLY
        !          1800:       printk( " (not in command)\n" );
        !          1801: #endif
        !          1802:       restore_flags( flags );
        !          1803:       return SCSI_ABORT_NOT_RUNNING;
        !          1804:    } else printk( "\n" );
        !          1805: 
        !          1806: #if DEBUG_ABORT
        !          1807:    print_info( SCpnt );
        !          1808: #endif
        !          1809: 
        !          1810:    fdomain_make_bus_idle();
        !          1811: 
        !          1812:    current_SC->SCp.phase |= aborted;
        !          1813: 
        !          1814:    current_SC->result = DID_ABORT << 16;
        !          1815: 
        !          1816:    restore_flags( flags );
        !          1817:    
        !          1818:    /* Aborts are not done well. . . */
        !          1819:    my_done( DID_ABORT << 16 );
        !          1820: 
        !          1821:    return SCSI_ABORT_SUCCESS;
        !          1822: }
        !          1823: 
        !          1824: int fdomain_16x0_reset( Scsi_Cmnd *SCpnt )
        !          1825: {
        !          1826: #if DEBUG_RESET
        !          1827:    static int called_once = 0;
        !          1828: #endif
        !          1829: 
        !          1830: #if ERRORS_ONLY
        !          1831:    if (SCpnt) printk( "fdomain: SCSI Bus Reset\n" );
        !          1832: #endif
        !          1833: 
        !          1834: #if DEBUG_RESET
        !          1835:    if (called_once) print_info( current_SC );
        !          1836:    called_once = 1;
        !          1837: #endif
        !          1838:    
        !          1839:    outb( 1, SCSI_Cntl_port );
        !          1840:    do_pause( 2 );
        !          1841:    outb( 0, SCSI_Cntl_port );
        !          1842:    do_pause( 115 );
        !          1843:    outb( 0, SCSI_Mode_Cntl_port );
        !          1844:    outb( PARITY_MASK, TMC_Cntl_port );
        !          1845: 
        !          1846:    /* Unless this is the very first call (i.e., SCPnt == NULL), everything
        !          1847:       is probably hosed at this point.  We will, however, try to keep
        !          1848:       things going by informing the high-level code that we need help. */
        !          1849: 
        !          1850:    return SCSI_RESET_WAKEUP;
        !          1851: }
        !          1852: 
        !          1853: #include "sd.h"
        !          1854: #include "scsi_ioctl.h"
        !          1855: 
        !          1856: int fdomain_16x0_biosparam( Scsi_Disk *disk, kdev_t dev, int *info_array )
        !          1857: {
        !          1858:    int              drive;
        !          1859:    unsigned char    buf[512 + sizeof( int ) * 2];
        !          1860:    int             size      = disk->capacity;
        !          1861:    int              *sizes    = (int *)buf;
        !          1862:    unsigned char    *data     = (unsigned char *)(sizes + 2);
        !          1863:    unsigned char    do_read[] = { READ_6, 0, 0, 0, 1, 0 };
        !          1864:    int              retcode;
        !          1865:    struct drive_info {
        !          1866:       unsigned short cylinders;
        !          1867:       unsigned char  heads;
        !          1868:       unsigned char  sectors;
        !          1869:    } *i;
        !          1870:    
        !          1871:    /* NOTES:
        !          1872:       The RAM area starts at 0x1f00 from the bios_base address.
        !          1873: 
        !          1874:       For BIOS Version 2.0:
        !          1875:       
        !          1876:       The drive parameter table seems to start at 0x1f30.
        !          1877:       The first byte's purpose is not known.
        !          1878:       Next is the cylinder, head, and sector information.
        !          1879:       The last 4 bytes appear to be the drive's size in sectors.
        !          1880:       The other bytes in the drive parameter table are unknown.
        !          1881:       If anyone figures them out, please send me mail, and I will
        !          1882:       update these notes.
        !          1883: 
        !          1884:       Tape drives do not get placed in this table.
        !          1885: 
        !          1886:       There is another table at 0x1fea:
        !          1887:       If the byte is 0x01, then the SCSI ID is not in use.
        !          1888:       If the byte is 0x18 or 0x48, then the SCSI ID is in use,
        !          1889:       although tapes don't seem to be in this table.  I haven't
        !          1890:       seen any other numbers (in a limited sample).
        !          1891: 
        !          1892:       0x1f2d is a drive count (i.e., not including tapes)
        !          1893: 
        !          1894:       The table at 0x1fcc are I/O ports addresses for the various
        !          1895:       operations.  I calculate these by hand in this driver code.
        !          1896: 
        !          1897:       
        !          1898:       
        !          1899:       For the ISA-200S version of BIOS Version 2.0:
        !          1900: 
        !          1901:       The drive parameter table starts at 0x1f33.
        !          1902: 
        !          1903:       WARNING: Assume that the table entry is 25 bytes long.  Someone needs
        !          1904:       to check this for the Quantum ISA-200S card.
        !          1905: 
        !          1906:       
        !          1907:       
        !          1908:       For BIOS Version 3.2:
        !          1909: 
        !          1910:       The drive parameter table starts at 0x1f70.  Each entry is
        !          1911:       0x0a bytes long.  Heads are one less than we need to report.
        !          1912:     */
        !          1913: 
        !          1914:    drive = MINOR(dev) / 16;
        !          1915: 
        !          1916:    if (bios_major == 2) {
        !          1917:       switch (Quantum) {
        !          1918:       case 2:                  /* ISA_200S */
        !          1919:                                /* The value of 25 has never been verified.
        !          1920:                                   It should probably be 15. */
        !          1921:         i = (struct drive_info *)( (char *)bios_base + 0x1f33 + drive * 25 );
        !          1922:         break;
        !          1923:       case 3:                  /* ISA_250MG */
        !          1924:         i = (struct drive_info *)( (char *)bios_base + 0x1f36 + drive * 15 );
        !          1925:         break;
        !          1926:       case 4:                  /* ISA_200S (another one) */
        !          1927:         i = (struct drive_info *)( (char *)bios_base + 0x1f34 + drive * 15 );
        !          1928:         break;
        !          1929:       default:
        !          1930:         i = (struct drive_info *)( (char *)bios_base + 0x1f31 + drive * 25 );
        !          1931:         break;
        !          1932:       }
        !          1933:       info_array[0] = i->heads;
        !          1934:       info_array[1] = i->sectors;
        !          1935:       info_array[2] = i->cylinders;
        !          1936:    } else if (bios_major == 3
        !          1937:              && bios_minor >= 0
        !          1938:              && bios_minor < 4) { /* 3.0 and 3.2 BIOS */
        !          1939:       i = (struct drive_info *)( (char *)bios_base + 0x1f71 + drive * 10 );
        !          1940:       info_array[0] = i->heads + 1;
        !          1941:       info_array[1] = i->sectors;
        !          1942:       info_array[2] = i->cylinders;
        !          1943:    } else {                    /* 3.4 BIOS (and up?) */
        !          1944:       /* This algorithm was provided by Future Domain (much thanks!). */
        !          1945: 
        !          1946:       sizes[0] = 0;            /* zero bytes out */
        !          1947:       sizes[1] = 512;          /* one sector in */
        !          1948:       memcpy( data, do_read, sizeof( do_read ) );
        !          1949:       retcode = kernel_scsi_ioctl( disk->device,
        !          1950:                                   SCSI_IOCTL_SEND_COMMAND,
        !          1951:                                   (void *)buf );
        !          1952:       if (!retcode                                 /* SCSI command ok */
        !          1953:          && data[511] == 0xaa && data[510] == 0x55 /* Partition table valid */
        !          1954:          && data[0x1c2]) {                         /* Partition type */
        !          1955: 
        !          1956:         /* The partition table layout is as follows:
        !          1957: 
        !          1958:            Start: 0x1b3h
        !          1959:            Offset: 0 = partition status
        !          1960:                    1 = starting head
        !          1961:                    2 = starting sector and cylinder (word, encoded)
        !          1962:                    4 = partition type
        !          1963:                    5 = ending head
        !          1964:                    6 = ending sector and cylinder (word, encoded)
        !          1965:                    8 = starting absolute sector (double word)
        !          1966:                    c = number of sectors (double word)
        !          1967:            Signature: 0x1fe = 0x55aa
        !          1968: 
        !          1969:            So, this algorithm assumes:
        !          1970:            1) the first partition table is in use,
        !          1971:            2) the data in the first entry is correct, and
        !          1972:            3) partitions never divide cylinders
        !          1973: 
        !          1974:            Note that (1) may be FALSE for NetBSD (and other BSD flavors),
        !          1975:            as well as for Linux.  Note also, that Linux doesn't pay any
        !          1976:            attention to the fields that are used by this algorithm -- it
        !          1977:            only uses the absolute sector data.  Recent versions of Linux's
        !          1978:            fdisk(1) will fill this data in correctly, and forthcoming
        !          1979:            versions will check for consistency.
        !          1980: 
        !          1981:            Checking for a non-zero partition type is not part of the
        !          1982:            Future Domain algorithm, but it seemed to be a reasonable thing
        !          1983:            to do, especially in the Linux and BSD worlds. */
        !          1984: 
        !          1985:         info_array[0] = data[0x1c3] + 1;           /* heads */
        !          1986:         info_array[1] = data[0x1c4] & 0x3f;        /* sectors */
        !          1987:       } else {
        !          1988: 
        !          1989:         /* Note that this new method guarantees that there will always be
        !          1990:            less than 1024 cylinders on a platter.  This is good for drives
        !          1991:            up to approximately 7.85GB (where 1GB = 1024 * 1024 kB). */
        !          1992: 
        !          1993:         if ((unsigned int)size >= 0x7e0000U) {
        !          1994:            info_array[0] = 0xff; /* heads   = 255 */
        !          1995:            info_array[1] = 0x3f; /* sectors =  63 */
        !          1996:         } else if ((unsigned int)size >= 0x200000U) {
        !          1997:            info_array[0] = 0x80; /* heads   = 128 */
        !          1998:            info_array[1] = 0x3f; /* sectors =  63 */
        !          1999:         } else {
        !          2000:            info_array[0] = 0x40; /* heads   =  64 */
        !          2001:            info_array[1] = 0x20; /* sectors =  32 */
        !          2002:         }
        !          2003:       }
        !          2004:                                /* For both methods, compute the cylinders */
        !          2005:       info_array[2] = (unsigned int)size / (info_array[0] * info_array[1] );
        !          2006:    }
        !          2007:    
        !          2008:    return 0;
        !          2009: }
        !          2010: 
        !          2011: #ifdef MODULE
        !          2012: /* Eventually this will go into an include file, but this will be later */
        !          2013: Scsi_Host_Template driver_template = FDOMAIN_16X0;
        !          2014: 
        !          2015: #include "scsi_module.c"
        !          2016: #endif

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.