drivers/scsi/aha152x.c

/* */
This source file includes following definitions.
do_pause
append_SC
remove_first_SC
remove_SC
make_acklow
getphase
aha152x_setup
aha152x_porttest
aha152x_checksetup
aha152x_detect
aha152x_queue
aha152x_command
aha152x_abort
aha152x_reset_ports
aha152x_reset
aha152x_biosparam
aha152x_done
aha152x_intr
aha152x_panic
disp_ports
disp_enintr
enter_driver
leave_driver
show_command
show_queues
aha152x_set_info
get_command
aha152x_proc_info
   1 /* aha152x.c -- Adaptec AHA-152x driver
   2  * Author: Juergen E. Fischer, fischer@et-inf.fho-emden.de
   3  * Copyright 1993, 1994, 1995 Juergen E. Fischer
   4  *
   5  *
   6  * This driver is based on
   7  *   fdomain.c -- Future Domain TMC-16x0 driver
   8  * which is
   9  *   Copyright 1992, 1993 Rickard E. Faith (faith@cs.unc.edu)
  10  *
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 2, or (at your option) any
  15  * later version.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  *
  23  * $Id: aha152x.c,v 1.14 1996/01/17 15:11:20 fischer Exp fischer $
  24  *
  25  * $Log: aha152x.c,v $
  26  * Revision 1.14  1996/01/17  15:11:20  fischer
  27  * - fixed lockup in MESSAGE IN phase after reconnection
  28  *
  29  * Revision 1.13  1996/01/09  02:15:53  fischer
  30  * - some cleanups
  31  * - moved request_irq behind controller initialization
  32  *   (to avoid spurious interrupts)
  33  *
  34  * Revision 1.12  1995/12/16  12:26:07  fischer
  35  * - barrier()'s added
  36  * - configurable RESET delay added
  37  *
  38  * Revision 1.11  1995/12/06  21:18:35  fischer
  39  * - some minor updates
  40  *
  41  * Revision 1.10  1995/07/22  19:18:45  fischer
  42  * - support for 2 controllers
  43  * - started synchronous data transfers (not working yet)
  44  *
  45  * Revision 1.9  1995/03/18  09:20:24  root
  46  * - patches for PCMCIA and modules
  47  *
  48  * Revision 1.8  1995/01/21  22:07:19  root
  49  * - snarf_region => request_region
  50  * - aha152x_intr interface change
  51  *
  52  * Revision 1.7  1995/01/02  23:19:36  root
  53  * - updated COMMAND_SIZE to cmd_len
  54  * - changed sti() to restore_flags()
  55  * - fixed some #ifdef which generated warnings
  56  *
  57  * Revision 1.6  1994/11/24  20:35:27  root
  58  * - problem with odd number of bytes in fifo fixed
  59  *
  60  * Revision 1.5  1994/10/30  14:39:56  root
  61  * - abort code fixed
  62  * - debugging improved
  63  *
  64  * Revision 1.4  1994/09/12  11:33:01  root
  65  * - irqaction to request_irq
  66  * - abortion updated
  67  *
  68  * Revision 1.3  1994/08/04  13:53:05  root
  69  * - updates for mid-level-driver changes
  70  * - accept unexpected BUSFREE phase as error condition
  71  * - parity check now configurable
  72  *
  73  * Revision 1.2  1994/07/03  12:56:36  root
  74  * - cleaned up debugging code
  75  * - more tweaking on reset delays
  76  * - updated abort/reset code (pretty untested...)
  77  *
  78  * Revision 1.1  1994/05/28  21:18:49  root
  79  * - update for mid-level interface change (abort-reset)
  80  * - delays after resets adjusted for some slow devices
  81  *
  82  * Revision 1.0  1994/03/25  12:52:00  root
  83  * - Fixed "more data than expected" problem
  84  * - added new BIOS signatures
  85  *
  86  * Revision 0.102  1994/01/31  20:44:12  root
  87  * - minor changes in insw/outsw handling
  88  *
  89  * Revision 0.101  1993/12/13  01:16:27  root
  90  * - fixed STATUS phase (non-GOOD stati were dropped sometimes;
  91  *   fixes problems with CD-ROM sector size detection & media change)
  92  *
  93  * Revision 0.100  1993/12/10  16:58:47  root
  94  * - fix for unsuccessful selections in case of non-continuous id assignments
  95  *   on the scsi bus.
  96  *
  97  * Revision 0.99  1993/10/24  16:19:59  root
  98  * - fixed DATA IN (rare read errors gone)
  99  *
 100  * Revision 0.98  1993/10/17  12:54:44  root
 101  * - fixed some recent fixes (shame on me)
 102  * - moved initialization of scratch area to aha152x_queue
 103  *
 104  * Revision 0.97  1993/10/09  18:53:53  root
 105  * - DATA IN fixed. Rarely left data in the fifo.
 106  *
 107  * Revision 0.96  1993/10/03  00:53:59  root
 108  * - minor changes on DATA IN
 109  *
 110  * Revision 0.95  1993/09/24  10:36:01  root
 111  * - change handling of MSGI after reselection
 112  * - fixed sti/cli
 113  * - minor changes
 114  *
 115  * Revision 0.94  1993/09/18  14:08:22  root
 116  * - fixed bug in multiple outstanding command code
 117  * - changed detection
 118  * - support for kernel command line configuration
 119  * - reset corrected
 120  * - changed message handling
 121  *
 122  * Revision 0.93  1993/09/15  20:41:19  root
 123  * - fixed bugs with multiple outstanding commands
 124  *
 125  * Revision 0.92  1993/09/13  02:46:33  root
 126  * - multiple outstanding commands work (no problems with IBM drive)
 127  *
 128  * Revision 0.91  1993/09/12  20:51:46  root
 129  * added multiple outstanding commands
 130  * (some problem with this $%&? IBM device remain)
 131  *
 132  * Revision 0.9  1993/09/12  11:11:22  root
 133  * - corrected auto-configuration
 134  * - changed the auto-configuration (added some '#define's)
 135  * - added support for dis-/reconnection
 136  *
 137  * Revision 0.8  1993/09/06  23:09:39  root
 138  * - added support for the drive activity light
 139  * - minor changes
 140  *
 141  * Revision 0.7  1993/09/05  14:30:15  root
 142  * - improved phase detection
 143  * - now using the new snarf_region code of 0.99pl13
 144  *
 145  * Revision 0.6  1993/09/02  11:01:38  root
 146  * first public release; added some signatures and biosparam()
 147  *
 148  * Revision 0.5  1993/08/30  10:23:30  root
 149  * fixed timing problems with my IBM drive
 150  *
 151  * Revision 0.4  1993/08/29  14:06:52  root
 152  * fixed some problems with timeouts due incomplete commands
 153  *
 154  * Revision 0.3  1993/08/28  15:55:03  root
 155  * writing data works too.  mounted and worked on a dos partition
 156  *
 157  * Revision 0.2  1993/08/27  22:42:07  root
 158  * reading data works.  Mounted a msdos partition.
 159  *
 160  * Revision 0.1  1993/08/25  13:38:30  root
 161  * first "damn thing doesn't work" version
 162  *
 163  * Revision 0.0  1993/08/14  19:54:25  root
 164  * empty function bodies; detect() works.
 165  *
 166  *
 167  **************************************************************************
 168 
 169 
 170  
 171  DESCRIPTION:
 172 
 173  This is the Linux low-level SCSI driver for Adaptec AHA-1520/1522
 174  SCSI host adapters.
 175 
 176 
 177  PER-DEFINE CONFIGURABLE OPTIONS:
 178 
 179  AUTOCONF:
 180    use configuration the controller reports (only 152x)
 181 
 182  SKIP_BIOSTEST:
 183    Don't test for BIOS signature (AHA-1510 or disabled BIOS)
 184 
 185  SETUP0 { IOPORT, IRQ, SCSI_ID, RECONNECT, PARITY, SYNCHRONOUS, DELAY }:
 186    override for the first controller
 187    
 188  SETUP1 { IOPORT, IRQ, SCSI_ID, RECONNECT, PARITY, SYNCHRONOUS, DELAY }:
 189    override for the second controller
 190 
 191 
 192  LILO COMMAND LINE OPTIONS:
 193 
 194  aha152x=<IOPORT>[,<IRQ>[,<SCSI-ID>[,<RECONNECT>[,<PARITY>[,<SYNCHRONOUS>[,<DELAY>]]]]]]
 195 
 196  The normal configuration can be overridden by specifying a command line.
 197  When you do this, the BIOS test is skipped. Entered values have to be
 198  valid (known). Don't use values that aren't supported under normal operation.
 199  If you think that you need other values: contact me.  For two controllers
 200  use the aha152x statement twice.
 201 
 202 
 203  REFERENCES USED:
 204 
 205  "AIC-6260 SCSI Chip Specification", Adaptec Corporation.
 206 
 207  "SCSI COMPUTER SYSTEM INTERFACE - 2 (SCSI-2)", X3T9.2/86-109 rev. 10h
 208 
 209  "Writing a SCSI device driver for Linux", Rik Faith (faith@cs.unc.edu)
 210 
 211  "Kernel Hacker's Guide", Michael K. Johnson (johnsonm@sunsite.unc.edu)
 212 
 213  "Adaptec 1520/1522 User's Guide", Adaptec Corporation.
 214  
 215  Michael K. Johnson (johnsonm@sunsite.unc.edu)
 216 
 217  Drew Eckhardt (drew@cs.colorado.edu)
 218 
 219  Eric Youngdale (ericy@cais.com) 
 220 
 221  special thanks to Eric Youngdale for the free(!) supplying the
 222  documentation on the chip.
 223 
 224  **************************************************************************/
 225 
 226 #ifdef PCMCIA
 227 #define MODULE
 228 #endif
 229 
 230 #include <linux/module.h>
 231 
 232 #ifdef PCMCIA
 233 #undef MODULE
 234 #endif
 235 
 236 #include <linux/sched.h>
 237 #include <asm/io.h>
 238 #include <linux/blk.h>
 239 #include "scsi.h"
 240 #include "sd.h"
 241 #include "hosts.h"
 242 #include "constants.h"
 243 #include <asm/system.h>
 244 #include <linux/errno.h>
 245 #include <linux/string.h>
 246 #include <linux/wait.h>
 247 #include <linux/ioport.h>
 248 #include <linux/proc_fs.h>
 249 
 250 #include "aha152x.h"
 251 #include <linux/stat.h>
 252 
 253 struct proc_dir_entry proc_scsi_aha152x = {
 254     PROC_SCSI_AHA152X, 7, "aha152x",
 255     S_IFDIR | S_IRUGO | S_IXUGO, 2
 256 };
 257 
 258 /* DEFINES */
 259 
 260 /* For PCMCIA cards, always use AUTOCONF */
 261 #if defined(PCMCIA) || defined(MODULE)
 262 #if !defined(AUTOCONF)
 263 #define AUTOCONF
 264 #endif
 265 #endif
 266 
 267 #if !defined(AUTOCONF) && !defined(SETUP0)
 268 #error define AUTOCONF or SETUP0
 269 #endif
 270 
 271 #if defined(DEBUG_AHA152X)
 272 
 273 #undef  SKIP_PORTS              /* don't display ports */
 274 
 275 #undef  DEBUG_QUEUE             /* debug queue() */
 276 #undef  DEBUG_RESET             /* debug reset() */
 277 #undef  DEBUG_INTR              /* debug intr() */
 278 #undef  DEBUG_SELECTION         /* debug selection part in intr() */
 279 #undef  DEBUG_MSGO              /* debug message out phase in intr() */
 280 #undef  DEBUG_MSGI              /* debug message in phase in intr() */
 281 #undef  DEBUG_STATUS            /* debug status phase in intr() */
 282 #undef  DEBUG_CMD               /* debug command phase in intr() */
 283 #undef  DEBUG_DATAI             /* debug data in phase in intr() */
 284 #undef  DEBUG_DATAO             /* debug data out phase in intr() */
 285 #undef  DEBUG_ABORT             /* debug abort() */
 286 #undef  DEBUG_DONE              /* debug done() */
 287 #undef  DEBUG_BIOSPARAM         /* debug biosparam() */
 288 
 289 #undef  DEBUG_RACE              /* debug race conditions */
 290 #undef  DEBUG_PHASES            /* debug phases (useful to trace) */
 291 #undef  DEBUG_QUEUES            /* debug reselection */
 292 
 293 /* recently used for debugging */
 294 #if 0
 295 #endif
 296 
 297 #define DEBUG_SELECTION
 298 #define DEBUG_PHASES
 299 #define DEBUG_RESET
 300 #define DEBUG_ABORT
 301 
 302 #define DEBUG_DEFAULT (debug_reset|debug_abort)
 303 
 304 #endif
 305 
 306 /* END OF DEFINES */
 307 
 308 extern long loops_per_sec;
 309 
 310 #define DELAY_DEFAULT 100
 311 
 312 /* some additional "phases" for getphase() */
 313 #define P_BUSFREE  1
 314 #define P_PARITY   2
 315 
 316 /* possible irq range */
 317 #define IRQ_MIN 9
 318 #define IRQ_MAX 12
 319 #define IRQS    IRQ_MAX-IRQ_MIN+1
 320 
 321 enum {
 322   not_issued   = 0x0001,
 323   in_selection = 0x0002,
 324   disconnected = 0x0004,
 325   aborted      = 0x0008,
 326   sent_ident   = 0x0010,
 327   in_other     = 0x0020,
 328   in_sync      = 0x0040,
 329   sync_ok      = 0x0080,
 330 };
 331 
 332 /* set by aha152x_setup according to the command line */
 333 static int  setup_count=0;
 334 static struct aha152x_setup {
 335   int io_port;
 336   int irq;
 337   int scsiid;
 338   int reconnect;
 339   int parity;
 340   int synchronous;
 341   int delay;
 342 #ifdef DEBUG_AHA152X
 343   int debug;
 344 #endif
 345   char *conf;
 346 } setup[2];
 347 
 348 static struct Scsi_Host *aha152x_host[IRQS];
 349 
 350 #define HOSTDATA(shpnt)   ((struct aha152x_hostdata *) &shpnt->hostdata)
 351 #define CURRENT_SC        (HOSTDATA(shpnt)->current_SC)
 352 #define ISSUE_SC          (HOSTDATA(shpnt)->issue_SC)
 353 #define DISCONNECTED_SC   (HOSTDATA(shpnt)->disconnected_SC)
 354 #define DELAY             (HOSTDATA(shpnt)->delay)
 355 #define SYNCRATE          (HOSTDATA(shpnt)->syncrate[CURRENT_SC->target])
 356 #define MSG(i)            (HOSTDATA(shpnt)->message[i])
 357 #define MSGLEN            (HOSTDATA(shpnt)->message_len)
 358 #define ADDMSG(x)         (MSG(MSGLEN++)=x)
 359 
 360 struct aha152x_hostdata {
 361   Scsi_Cmnd     *issue_SC;
 362   Scsi_Cmnd     *current_SC;
 363   Scsi_Cmnd     *disconnected_SC;
 364   int           aborting;
 365   int           abortion_complete;
 366   int           abort_result;
 367   int           commands;
 368   
 369   int           reconnect;
 370   int           parity;
 371   int           synchronous;
 372   int           delay;
 373  
 374   unsigned char syncrate[8];
 375   
 376   unsigned char message[256];
 377   int           message_len;
 378 
 379 #ifdef DEBUG_AHA152X
 380   int           debug;
 381 #endif
 382 };
 383 
 384 void aha152x_intr(int irq, void *dev_id, struct pt_regs *);
 385 void aha152x_done(struct Scsi_Host *shpnt, int error);
 386 void aha152x_setup(char *str, int *ints);
 387 int aha152x_checksetup(struct aha152x_setup *setup);
 388 
 389 static void aha152x_reset_ports(struct Scsi_Host *shpnt);
 390 static void aha152x_panic(struct Scsi_Host *shpnt, char *msg);
 391 
 392 static void disp_ports(struct Scsi_Host *shpnt);
 393 static void show_command(Scsi_Cmnd *ptr);
 394 static void show_queues(struct Scsi_Host *shpnt);
 395 static void disp_enintr(struct Scsi_Host *shpnt);
 396 
 397 #if defined(DEBUG_RACE)
 398 static void enter_driver(const char *);
 399 static void leave_driver(const char *);
 400 #endif
 401 
 402 /* possible i/o addresses for the AIC-6260 */
 403 static unsigned short ports[] =
 404 {
 405   0x340,      /* default first */
 406   0x140
 407 };
 408 #define PORT_COUNT (sizeof(ports) / sizeof(unsigned short))
 409 
 410 #if !defined(SKIP_BIOSTEST)
 411 /* possible locations for the Adaptec BIOS */
 412 static void *addresses[] =
 413 {
 414   (void *) 0xdc000,   /* default first */
 415   (void *) 0xc8000,
 416   (void *) 0xcc000,
 417   (void *) 0xd0000,
 418   (void *) 0xd4000,
 419   (void *) 0xd8000,
 420   (void *) 0xe0000,
 421   (void *) 0xeb800,   /* VTech Platinum SMP */
 422   (void *) 0xf0000,
 423 };
 424 #define ADDRESS_COUNT (sizeof(addresses) / sizeof(void *))
 425 
 426 /* signatures for various AIC-6[23]60 based controllers.
 427    The point in detecting signatures is to avoid useless
 428    and maybe harmful probes on ports. I'm not sure that
 429    all listed boards pass auto-configuration. For those
 430    which fail the BIOS signature is obsolete, because
 431    user intervention to supply the configuration is 
 432    needed anyway. */
 433 static struct signature {
 434   char *signature;
 435   int  sig_offset;
 436   int  sig_length;
 437 } signatures[] =
 438 {
 439   { "Adaptec AHA-1520 BIOS",      0x102e, 21 },  /* Adaptec 152x */
 440   { "Adaptec ASW-B626 BIOS",      0x1029, 21 },  /* on-board controller */
 441   { "Adaptec BIOS: ASW-B626",       0x0f, 22 },  /* on-board controller */
 442   { "Adaptec ASW-B626 S2",        0x2e6c, 19 },  /* on-board controller */
 443   { "Adaptec BIOS:AIC-6360",         0xc, 21 },  /* on-board controller */
 444   { "ScsiPro SP-360 BIOS",        0x2873, 19 },  /* ScsiPro-Controller  */
 445   { "GA-400 LOCAL BUS SCSI BIOS", 0x102e, 26 },  /* Gigabyte Local-Bus-SCSI */
 446   { "Adaptec BIOS:AVA-282X",         0xc, 21 },  /* Adaptec 282x */
 447   { "Adaptec IBM Dock II SCSI",   0x2edd, 24 },  /* IBM Thinkpad Dock II */
 448   { "Adaptec BIOS:AHA-1532P",       0x1c, 22 },  /* IBM Thinkpad Dock II SCSI */
 449 };
 450 #define SIGNATURE_COUNT (sizeof(signatures) / sizeof(struct signature))
 451 #endif
 452 
 453 
 454 static void do_pause(unsigned amount) /* Pause for amount*10 milliseconds */
     /*  */
 455 {
 456    unsigned long the_time = jiffies + amount; /* 0.01 seconds per jiffy */
 457 
 458    while (jiffies < the_time)
 459     barrier();
 460 }
 461 
 462 /*
 463  *  queue services:
 464  */
 465 static inline void append_SC(Scsi_Cmnd **SC, Scsi_Cmnd *new_SC)
     /*  */
 466 {
 467   Scsi_Cmnd *end;
 468 
 469   new_SC->host_scribble = (unsigned char *) NULL;
 470   if(!*SC)
 471     *SC=new_SC;
 472   else
 473     {
 474       for(end=*SC; end->host_scribble; end = (Scsi_Cmnd *) end->host_scribble)
 475         ;
 476       end->host_scribble = (unsigned char *) new_SC;
 477     }
 478 }
 479 
 480 static inline Scsi_Cmnd *remove_first_SC(Scsi_Cmnd **SC)
     /*  */
 481 {
 482   Scsi_Cmnd *ptr;
 483 
 484   ptr=*SC;
 485   if(ptr)
 486     *SC= (Scsi_Cmnd *) (*SC)->host_scribble;
 487   return ptr;
 488 }
 489 
 490 static inline Scsi_Cmnd *remove_SC(Scsi_Cmnd **SC, int target, int lun)
     /*  */
 491 {
 492   Scsi_Cmnd *ptr, *prev;
 493 
 494   for(ptr=*SC, prev=NULL;
 495        ptr && ((ptr->target!=target) || (ptr->lun!=lun));
 496       prev = ptr, ptr = (Scsi_Cmnd *) ptr->host_scribble)
 497     ;
 498 
 499   if(ptr)
 500     if(prev)
 501       prev->host_scribble = ptr->host_scribble;
 502     else
 503       *SC= (Scsi_Cmnd *) ptr->host_scribble;
 504   return ptr;
 505 }
 506 
 507 /*
 508  * read inbound byte and wait for ACK to get low
 509  */
 510 static void make_acklow(struct Scsi_Host *shpnt)
     /*  */
 511 {
 512   SETPORT(SXFRCTL0, CH1|SPIOEN);
 513   GETPORT(SCSIDAT);
 514   SETPORT(SXFRCTL0, CH1);
 515 
 516   while(TESTHI(SCSISIG, ACKI))
 517     barrier();
 518 }
 519 
 520 /*
 521  * detect current phase more reliable:
 522  * phase is valid, when the target asserts REQ after we've deasserted ACK.
 523  *
 524  * return value is a valid phase or an error code.
 525  *
 526  * errorcodes:
 527  *   P_BUSFREE   BUS FREE phase detected
 528  *   P_PARITY    parity error in DATA phase
 529  */
 530 static int getphase(struct Scsi_Host *shpnt)
     /*  */
 531 {
 532   int phase, sstat1;
 533   
 534   while(1)
 535     {
 536       do
 537         {
 538           while(!((sstat1 = GETPORT(SSTAT1)) & (BUSFREE|SCSIRSTI|REQINIT)))
 539             barrier();
 540           if(sstat1 & BUSFREE)
 541             return P_BUSFREE;
 542           if(sstat1 & SCSIRSTI)
 543             {
 544               printk("aha152x: RESET IN\n");
 545               SETPORT(SSTAT1, SCSIRSTI);
 546             }
 547         }
 548       while(TESTHI(SCSISIG, ACKI) || TESTLO(SSTAT1, REQINIT));
 549 
 550       SETPORT(SSTAT1, CLRSCSIPERR);
 551   
 552       phase = GETPORT(SCSISIG) & P_MASK ;
 553 
 554       if(TESTHI(SSTAT1, SCSIPERR))
 555         {
 556           if((phase & (CDO|MSGO))==0)                        /* DATA phase */
 557             return P_PARITY;
 558 
 559           make_acklow(shpnt);
 560         }
 561       else
 562         return phase;
 563     }
 564 }
 565 
 566 /* called from init/main.c */
 567 void aha152x_setup(char *str, int *ints)
     /*  */
 568 {
 569   if(setup_count>2)
 570     panic("aha152x: you can only configure up to two controllers\n");
 571 
 572   setup[setup_count].conf        = str;
 573   setup[setup_count].io_port     = ints[0] >= 1 ? ints[1] : 0x340;
 574   setup[setup_count].irq         = ints[0] >= 2 ? ints[2] : 11;
 575   setup[setup_count].scsiid      = ints[0] >= 3 ? ints[3] : 7;
 576   setup[setup_count].reconnect   = ints[0] >= 4 ? ints[4] : 1;
 577   setup[setup_count].parity      = ints[0] >= 5 ? ints[5] : 1;
 578   setup[setup_count].synchronous = ints[0] >= 6 ? ints[6] : 0 /* FIXME: 1 */;
 579   setup[setup_count].delay       = ints[0] >= 7 ? ints[7] : DELAY_DEFAULT;
 580 #ifdef DEBUG_AHA152X
 581   setup[setup_count].debug       = ints[0] >= 8 ? ints[8] : DEBUG_DEFAULT;
 582   if(ints[0]>8)
 583     { 
 584       printk("aha152x: usage: aha152x=<IOBASE>[,<IRQ>[,<SCSI ID>"
 585                  "[,<RECONNECT>[,<PARITY>[,<SYNCHRONOUS>[,<DELAY>[,<DEBUG>]]]]]]]\n");
 586 #else
 587   if(ints[0]>7)
 588     {
 589       printk("aha152x: usage: aha152x=<IOBASE>[,<IRQ>[,<SCSI ID>"
 590              "[,<RECONNECT>[,<PARITY>[,<SYNCHRONOUS>[,<DELAY>]]]]]]\n");
 591 #endif
 592     }
 593   else 
 594     setup_count++;
 595 }
 596 
 597 /*
 598    Test, if port_base is valid.
 599  */
 600 static int aha152x_porttest(int io_port)
     /*  */
 601 {
 602   int i;
 603 
 604   if(check_region(io_port, IO_RANGE))
 605     return 0;
 606 
 607   SETPORT(io_port+O_DMACNTRL1, 0);          /* reset stack pointer */
 608   for(i=0; i<16; i++)
 609     SETPORT(io_port+O_STACK, i);
 610 
 611   SETPORT(io_port+O_DMACNTRL1, 0);          /* reset stack pointer */
 612   for(i=0; i<16 && GETPORT(io_port+O_STACK)==i; i++)
 613     ;
 614 
 615   return(i==16);
 616 }
 617 
 618 int aha152x_checksetup(struct aha152x_setup *setup)
     /*  */
 619 {
 620   int i;
 621   
 622 #ifndef PCMCIA
 623   for(i=0; i<PORT_COUNT && (setup->io_port != ports[i]); i++)
 624     ;
 625   
 626   if(i==PORT_COUNT)
 627     return 0;
 628 #endif
 629   
 630   if(!aha152x_porttest(setup->io_port))
 631     return 0;
 632   
 633   if((setup->irq < IRQ_MIN) && (setup->irq > IRQ_MAX))
 634     return 0;
 635   
 636   if((setup->scsiid < 0) || (setup->scsiid > 7))
 637     return 0;
 638   
 639   if((setup->reconnect < 0) || (setup->reconnect > 1))
 640     return 0;
 641   
 642   if((setup->parity < 0) || (setup->parity > 1))
 643     return 0;
 644   
 645   if((setup->synchronous < 0) || (setup->synchronous > 1))
 646     return 0;
 647   
 648   return 1;
 649 }
 650 
 651 
 652 int aha152x_detect(Scsi_Host_Template * tpnt)
     /*  */
 653 {
 654   int                 i, j, ok;
 655 #if defined(AUTOCONF)
 656   aha152x_config      conf;
 657 #endif
 658   
 659   tpnt->proc_dir = &proc_scsi_aha152x;
 660 
 661   for(i=0; i<IRQS; i++)
 662     aha152x_host[i] = (struct Scsi_Host *) NULL;
 663   
 664   if(setup_count)
 665     {
 666       printk("aha152x: processing commandline: ");
 667    
 668       for(i=0; i<setup_count; i++)
 669         if(!aha152x_checksetup(&setup[i]))
 670         {
 671                 printk("\naha152x: %s\n", setup[i].conf);
 672                 printk("aha152x: invalid line (controller=%d)\n", i+1);
 673         }
 674 
 675       printk("ok\n");
 676         }
 677 
 678 #ifdef SETUP0
 679   if(setup_count<2)
 680         {
 681       struct aha152x_setup override = SETUP0;
 682 
 683       if(setup_count==0 || (override.io_port != setup[0].io_port))
 684         if(!aha152x_checksetup(&override))
 685         {
 686                 printk("\naha152x: SETUP0 (0x%x, %d, %d, %d, %d, %d, %d) invalid\n",
 687                       override.io_port,
 688                       override.irq,
 689                       override.scsiid,
 690                       override.reconnect,
 691                       override.parity,
 692                       override.synchronous,
 693                       override.delay);
 694         }
 695         else
 696           setup[setup_count++] = override;
 697         }
 698 #endif
 699 
 700 #ifdef SETUP1
 701   if(setup_count<2)
 702         {
 703       struct aha152x_setup override = SETUP1;
 704 
 705       if(setup_count==0 || (override.io_port != setup[0].io_port))
 706         if(!aha152x_checksetup(&override))
 707         {
 708                 printk("\naha152x: SETUP1 (0x%x, %d, %d, %d, %d, %d, %d) invalid\n",
 709                        override.io_port,
 710                        override.irq,
 711                        override.scsiid,
 712                        override.reconnect,
 713                        override.parity,
 714                        override.synchronous,
 715                        override.delay);
 716     }
 717   else
 718           setup[setup_count++] = override;
 719     }
 720 #endif
 721   
 722 #if defined(AUTOCONF)
 723   if(setup_count<2)
 724     {
 725 #if !defined(SKIP_BIOSTEST)
 726       ok=0;
 727       for(i=0; i < ADDRESS_COUNT && !ok; i++)
 728             for(j=0; (j < SIGNATURE_COUNT) && !ok; j++)
 729           ok=!memcmp((void *) addresses[i]+signatures[j].sig_offset,
 730                      (void *) signatures[j].signature,
 731                      (int) signatures[j].sig_length);
 732 
 733       if(!ok && setup_count==0)
 734         return 0;
 735 
 736       printk("aha152x: BIOS test: passed, ");
 737 #else
 738       printk("aha152x: ");
 739 #endif /* !SKIP_BIOSTEST */
 740  
 741       for(i=0; i<PORT_COUNT && setup_count<2; i++)
 742             {
 743               if((setup_count==1) && (setup[0].io_port == ports[i]))
 744                 continue;
 745 
 746               if(aha152x_porttest(ports[i]))
 747         {
 748                   setup[setup_count].io_port = ports[i];
 749               
 750                   conf.cf_port =
 751                         (GETPORT(ports[i]+O_PORTA)<<8) + GETPORT(ports[i]+O_PORTB);
 752               
 753                   setup[setup_count].irq         = IRQ_MIN + conf.cf_irq;
 754                   setup[setup_count].scsiid      = conf.cf_id;
 755                   setup[setup_count].reconnect   = conf.cf_tardisc;
 756                   setup[setup_count].parity      = !conf.cf_parity;
 757                   setup[setup_count].synchronous = 0 /* FIXME: conf.cf_syncneg */;
 758                   setup[setup_count].delay       = DELAY_DEFAULT;
 759 #ifdef DEBUG_AHA152X
 760                   setup[setup_count].debug       = DEBUG_DEFAULT;
 761 #endif
 762                   setup_count++;
 763                 }
 764         }
 765 
 766       printk("auto configuration: ok, ");
 767     }
 768 #endif
 769 
 770   printk("detection complete\n");
 771 
 772   for(i=0; i<setup_count; i++)
 773     {
 774       struct Scsi_Host        *shpnt;
 775 
 776       shpnt = aha152x_host[setup[i].irq-IRQ_MIN] =
 777         scsi_register(tpnt, sizeof(struct aha152x_hostdata));
 778 
 779       shpnt->io_port                     = setup[i].io_port;
 780       shpnt->n_io_port                   = IO_RANGE;
 781       shpnt->irq                         = setup[i].irq;
 782 
 783       ISSUE_SC                           = (Scsi_Cmnd *) NULL;
 784       CURRENT_SC                         = (Scsi_Cmnd *) NULL;
 785       DISCONNECTED_SC                    = (Scsi_Cmnd *) NULL;
 786 
 787       HOSTDATA(shpnt)->reconnect         = setup[i].reconnect;
 788       HOSTDATA(shpnt)->parity            = setup[i].parity;
 789       HOSTDATA(shpnt)->synchronous       = setup[i].synchronous;
 790       HOSTDATA(shpnt)->delay             = setup[i].delay;
 791 #ifdef DEBUG_AHA152X
 792       HOSTDATA(shpnt)->debug             = setup[i].debug;
 793 #endif
 794 
 795       HOSTDATA(shpnt)->aborting          = 0;
 796       HOSTDATA(shpnt)->abortion_complete = 0;
 797       HOSTDATA(shpnt)->abort_result      = 0;
 798       HOSTDATA(shpnt)->commands          = 0;
 799 
 800       HOSTDATA(shpnt)->message_len       = 0;
 801 
 802       for(j=0; j<8; j++)
 803         HOSTDATA(shpnt)->syncrate[j] = 0;
 804  
 805       SETPORT(SCSIID, setup[i].scsiid << 4);
 806       shpnt->this_id=setup[i].scsiid;
 807   
 808       if(setup[i].reconnect)
 809         shpnt->hostt->can_queue=AHA152X_MAXQUEUE;
 810 
 811   /* RESET OUT */
 812       SETBITS(SCSISEQ, SCSIRSTO);
 813   do_pause(30);
 814       CLRBITS(SCSISEQ, SCSIRSTO);
 815       do_pause(setup[i].delay);
 816 
 817       aha152x_reset_ports(shpnt);
 818       
 819       printk("aha152x%d: vital data: PORTBASE=0x%03x, IRQ=%d, SCSI ID=%d,"
 820              " reconnect=%s, parity=%s, synchronous=%s, delay=%d\n",
 821              i,
 822              shpnt->io_port,
 823              shpnt->irq,
 824              shpnt->this_id,
 825              HOSTDATA(shpnt)->reconnect ? "enabled" : "disabled",
 826              HOSTDATA(shpnt)->parity ? "enabled" : "disabled",
 827              HOSTDATA(shpnt)->synchronous ? "enabled" : "disabled",
 828              HOSTDATA(shpnt)->delay);
 829 
 830       request_region(shpnt->io_port, IO_RANGE, "aha152x");  /* Register */
 831   
 832   /* not expecting any interrupts */
 833   SETPORT(SIMODE0, 0);
 834   SETPORT(SIMODE1, 0);
 835 
 836       SETBITS(DMACNTRL0, INTEN);
 837 
 838       ok = request_irq(setup[i].irq, aha152x_intr, SA_INTERRUPT, "aha152x", NULL);
 839       
 840       if(ok<0)
 841         {
 842           if(ok == -EINVAL)
 843             {
 844               printk("aha152x%d: bad IRQ %d.\n", i, setup[i].irq);
 845               printk("          Contact author.\n");
 846             }
 847           else
 848             if(ok == -EBUSY)
 849               printk("aha152x%d: IRQ %d already in use. Configure another.\n",
 850                      i, setup[i].irq);
 851             else
 852               {
 853                 printk("\naha152x%d: Unexpected error code on"
 854                        " requesting IRQ %d.\n", i, setup[i].irq);
 855                 printk("          Contact author.\n");
 856               }
 857           printk("aha152x: driver needs an IRQ.\n");
 858           continue;
 859         }
 860     }
 861   
 862   return (setup_count>0);
 863 }
 864 
 865 /* 
 866  *  Queue a command and setup interrupts for a free bus.
 867  */
 868 int aha152x_queue(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
     /*  */
 869 {
 870   struct Scsi_Host *shpnt = SCpnt->host;
 871   unsigned long flags;
 872 
 873 #if defined(DEBUG_RACE)
 874   enter_driver("queue");
 875 #else
 876 #if defined(DEBUG_QUEUE)
 877   if(HOSTDATA(shpnt)->debug & debug_queue)
 878     printk("aha152x: queue(), ");
 879 #endif
 880 #endif
 881 
 882 #if defined(DEBUG_QUEUE)
 883   if(HOSTDATA(shpnt)->debug & debug_queue)
 884   {
 885       printk("SCpnt (target = %d lun = %d cmnd = ",
 886              SCpnt->target, SCpnt->lun);
 887     print_command(SCpnt->cmnd);
 888       printk(", cmd_len=%d, pieces = %d size = %u), ",
 889              SCpnt->cmd_len, SCpnt->use_sg, SCpnt->request_bufflen);
 890       disp_ports(shpnt);
 891   }
 892 #endif
 893 
 894   SCpnt->scsi_done =       done;
 895 
 896   /* setup scratch area
 897      SCp.ptr              : buffer pointer
 898      SCp.this_residual    : buffer length
 899      SCp.buffer           : next buffer
 900      SCp.buffers_residual : left buffers in list
 901      SCp.phase            : current state of the command */
 902   SCpnt->SCp.phase = not_issued;
 903   if (SCpnt->use_sg)
 904     {
 905       SCpnt->SCp.buffer =
 906         (struct scatterlist *) SCpnt->request_buffer;
 907       SCpnt->SCp.ptr              = SCpnt->SCp.buffer->address;
 908       SCpnt->SCp.this_residual    = SCpnt->SCp.buffer->length;
 909       SCpnt->SCp.buffers_residual = SCpnt->use_sg - 1;
 910     }
 911   else
 912     {
 913       SCpnt->SCp.ptr              = (char *)SCpnt->request_buffer;
 914       SCpnt->SCp.this_residual    = SCpnt->request_bufflen;
 915       SCpnt->SCp.buffer           = NULL;
 916       SCpnt->SCp.buffers_residual = 0;
 917     }
 918           
 919   SCpnt->SCp.Status              = CHECK_CONDITION;
 920   SCpnt->SCp.Message             = 0;
 921   SCpnt->SCp.have_data_in        = 0;
 922   SCpnt->SCp.sent_command        = 0;
 923 
 924   /* Turn led on, when this is the first command. */
 925   save_flags(flags);
 926   cli();
 927   HOSTDATA(shpnt)->commands++;
 928   if(HOSTDATA(shpnt)->commands==1)
 929     SETPORT(PORTA, 1);
 930 
 931 #if defined(DEBUG_QUEUES)
 932   if(HOSTDATA(shpnt)->debug & debug_queues)
 933     printk("i+ (%d), ", HOSTDATA(shpnt)->commands);
 934 #endif
 935   append_SC(&ISSUE_SC, SCpnt);
 936   
 937   /* Enable bus free interrupt, when we aren't currently on the bus */
 938   if(!CURRENT_SC)
 939     {
 940       SETPORT(SIMODE0, DISCONNECTED_SC ? ENSELDI : 0);
 941       SETPORT(SIMODE1, ISSUE_SC ? ENBUSFREE : 0);
 942     }
 943   restore_flags(flags);
 944 
 945 #if defined(DEBUG_RACE)
 946   leave_driver("queue");
 947 #endif
 948 
 949   return 0;
 950 }
 951 
 952 /*
 953  *  We only support commands in interrupt-driven fashion
 954  */
 955 int aha152x_command(Scsi_Cmnd *SCpnt)
     /*  */
 956 {
 957   printk("aha152x: interrupt driven driver; use aha152x_queue()\n");
 958   return -1;
 959 }
 960 
 961 /*
 962  *  Abort a queued command
 963  *  (commands that are on the bus can't be aborted easily)
 964  */
 965 int aha152x_abort(Scsi_Cmnd *SCpnt)
     /*  */
 966 {
 967   struct Scsi_Host *shpnt = SCpnt->host;
 968   unsigned long flags;
 969   Scsi_Cmnd *ptr, *prev;
 970 
 971   save_flags(flags);
 972   cli();
 973 
 974 #if defined(DEBUG_ABORT)
 975   if(HOSTDATA(shpnt)->debug & debug_abort)
 976   { 
 977       printk("aha152x: abort(), SCpnt=0x%08x, ", (unsigned int) SCpnt);
 978       show_queues(shpnt);
 979   }
 980 #endif
 981 
 982   /* look for command in issue queue */
 983   for(ptr=ISSUE_SC, prev=NULL;
 984        ptr && ptr!=SCpnt;
 985        prev=ptr, ptr=(Scsi_Cmnd *) ptr->host_scribble)
 986     ;
 987 
 988   if(ptr)
 989     {
 990       /* dequeue */
 991       if(prev)
 992         prev->host_scribble = ptr->host_scribble;
 993       else
 994         ISSUE_SC = (Scsi_Cmnd *) ptr->host_scribble;
 995       restore_flags(flags);
 996 
 997       ptr->host_scribble = NULL;
 998       ptr->result = DID_ABORT << 16;
 999       ptr->scsi_done(ptr);
1000       return SCSI_ABORT_SUCCESS;
1001     }
1002 
1003   /* if the bus is busy or a command is currently processed,
1004      we can't do anything more */
1005   if (TESTLO(SSTAT1, BUSFREE) || (CURRENT_SC && CURRENT_SC!=SCpnt))
1006     {
1007       /* fail abortion, if bus is busy */
1008 
1009       if(!CURRENT_SC)
1010         printk("bus busy w/o current command, ");
1011  
1012       restore_flags(flags);
1013       return SCSI_ABORT_BUSY;
1014     }
1015 
1016   /* bus is free */
1017 
1018   if(CURRENT_SC)
1019   { 
1020     /* target entered bus free before COMMAND COMPLETE, nothing to abort */
1021     restore_flags(flags);
1022       CURRENT_SC->result = DID_ERROR << 16;
1023       CURRENT_SC->scsi_done(CURRENT_SC);
1024       CURRENT_SC = (Scsi_Cmnd *) NULL;
1025     return SCSI_ABORT_SUCCESS;
1026   }
1027 
1028   /* look for command in disconnected queue */
1029   for(ptr=DISCONNECTED_SC, prev=NULL;
1030        ptr && ptr!=SCpnt;
1031        prev=ptr, ptr=(Scsi_Cmnd *) ptr->host_scribble)
1032     ;
1033 
1034   if(ptr)
1035     if(!HOSTDATA(shpnt)->aborting)
1036       {
1037         /* dequeue */
1038         if(prev)
1039           prev->host_scribble = ptr->host_scribble;
1040         else
1041           DISCONNECTED_SC = (Scsi_Cmnd *) ptr->host_scribble;
1042   
1043         /* set command current and initiate selection,
1044            let the interrupt routine take care of the abortion */
1045         CURRENT_SC     = ptr;
1046         ptr->SCp.phase = in_selection|aborted;
1047         SETPORT(SCSIID, (shpnt->this_id << OID_) | CURRENT_SC->target);
1048         
1049         ADDMSG(ABORT);
1050   
1051         /* enable interrupts for SELECTION OUT DONE and SELECTION TIME OUT */
1052         SETPORT(SIMODE0, ENSELDO | (DISCONNECTED_SC ? ENSELDI : 0));
1053         SETPORT(SIMODE1, ENSELTIMO);
1054   
1055         /* Enable SELECTION OUT sequence */
1056         SETBITS(SCSISEQ, ENSELO | ENAUTOATNO);
1057   
1058         SETBITS(DMACNTRL0, INTEN);
1059         HOSTDATA(shpnt)->abort_result=SCSI_ABORT_SUCCESS;
1060         HOSTDATA(shpnt)->aborting++;
1061         HOSTDATA(shpnt)->abortion_complete=0;
1062 
1063         sti();  /* Hi Eric, guess what ;-) */
1064   
1065         /* sleep until the abortion is complete */
1066         while(!HOSTDATA(shpnt)->abortion_complete)
1067           barrier();
1068         HOSTDATA(shpnt)->aborting=0;
1069         return HOSTDATA(shpnt)->abort_result;
1070       }
1071     else
1072       {
1073         /* we're already aborting a command */
1074         restore_flags(flags);
1075         return SCSI_ABORT_BUSY;
1076       }
1077 
1078   /* command wasn't found */
1079   printk("command not found\n");
1080   restore_flags(flags);
1081   return SCSI_ABORT_NOT_RUNNING;
1082 }
1083 
1084 /*
1085  *  Restore default values to the AIC-6260 registers and reset the fifos
1086  */
1087 static void aha152x_reset_ports(struct Scsi_Host *shpnt)
     /*  */
1088 {
1089   /* disable interrupts */
1090   SETPORT(DMACNTRL0, RSTFIFO);
1091 
1092   SETPORT(SCSISEQ, 0);
1093 
1094   SETPORT(SXFRCTL1, 0);
1095   SETPORT(SCSISIG, 0);
1096   SETPORT(SCSIRATE, 0);
1097 
1098   /* clear all interrupt conditions */
1099   SETPORT(SSTAT0, 0x7f);
1100   SETPORT(SSTAT1, 0xef);
1101 
1102   SETPORT(SSTAT4, SYNCERR|FWERR|FRERR);
1103 
1104   SETPORT(DMACNTRL0, 0);
1105   SETPORT(DMACNTRL1, 0);
1106 
1107   SETPORT(BRSTCNTRL, 0xf1);
1108 
1109   /* clear SCSI fifo and transfer count */
1110   SETPORT(SXFRCTL0, CH1|CLRCH1|CLRSTCNT);
1111   SETPORT(SXFRCTL0, CH1);
1112 
1113   /* enable interrupts */
1114   SETPORT(SIMODE0, DISCONNECTED_SC ? ENSELDI : 0);
1115   SETPORT(SIMODE1, ISSUE_SC ? ENBUSFREE : 0);
1116 }
1117 
1118 /*
1119  *  Reset registers, reset a hanging bus and
1120  *  kill active and disconnected commands for target w/o soft reset
1121  */
1122 int aha152x_reset(Scsi_Cmnd *SCpnt)
     /*  */
1123 {
1124   struct Scsi_Host *shpnt = SCpnt->host;
1125   unsigned long flags;
1126   Scsi_Cmnd *ptr, *prev, *next;
1127 
1128   aha152x_reset_ports(shpnt);
1129 
1130   /* Reset, if bus hangs */
1131   if(TESTLO(SSTAT1, BUSFREE))
1132     {
1133        CLRBITS(DMACNTRL0, INTEN);
1134 
1135 #if defined(DEBUG_RESET)
1136        if(HOSTDATA(shpnt)->debug & debug_reset)
1137   {
1138        printk("aha152x: reset(), bus not free: SCSI RESET OUT\n");
1139            show_queues(shpnt);
1140   }
1141 #endif
1142 
1143        ptr=CURRENT_SC;
1144        if(ptr && !ptr->device->soft_reset)
1145          {
1146            ptr->host_scribble = NULL;
1147            ptr->result = DID_RESET << 16;
1148            ptr->scsi_done(CURRENT_SC);
1149            CURRENT_SC=NULL;
1150          }
1151 
1152        save_flags(flags);
1153        cli();
1154        prev=NULL; ptr=DISCONNECTED_SC;
1155        while(ptr)
1156          {
1157            if(!ptr->device->soft_reset)
1158              {
1159                if(prev)
1160                  prev->host_scribble = ptr->host_scribble;
1161                else
1162                  DISCONNECTED_SC = (Scsi_Cmnd *) ptr->host_scribble;
1163 
1164                next = (Scsi_Cmnd *) ptr->host_scribble;
1165   
1166                ptr->host_scribble = NULL;
1167                ptr->result        = DID_RESET << 16;
1168                ptr->scsi_done(ptr);
1169   
1170                ptr = next; 
1171              }
1172            else
1173              {
1174                prev=ptr;
1175                ptr = (Scsi_Cmnd *) ptr->host_scribble;
1176              }
1177          }
1178        restore_flags(flags);
1179 
1180 #if defined(DEBUG_RESET)
1181        if(HOSTDATA(shpnt)->debug & debug_reset)
1182        {
1183          printk("commands on targets w/ soft-resets:\n");
1184            show_queues(shpnt);
1185        }
1186 #endif
1187 
1188        /* RESET OUT */
1189        SETPORT(SCSISEQ, SCSIRSTO);
1190        do_pause(30);
1191        SETPORT(SCSISEQ, 0);
1192        do_pause(DELAY);
1193 
1194        SETPORT(SIMODE0, DISCONNECTED_SC ? ENSELDI : 0);
1195        SETPORT(SIMODE1, ISSUE_SC ? ENBUSFREE : 0);
1196 
1197        SETPORT(DMACNTRL0, INTEN);
1198     }
1199 
1200   return SCSI_RESET_SUCCESS;
1201 }
1202 
1203 /*
1204  * Return the "logical geometry"
1205  */
1206 int aha152x_biosparam(Scsi_Disk * disk, kdev_t dev, int *info_array)
     /*  */
1207 {
1208   int size = disk->capacity;
1209 
1210 #if defined(DEBUG_BIOSPARAM)
1211   if(HOSTDATA(shpnt)->debug & debug_biosparam)
1212     printk("aha152x_biosparam: dev=%s, size=%d, ", kdevname(dev), size);
1213 #endif
1214   
1215 /* I took this from other SCSI drivers, since it provides
1216    the correct data for my devices. */
1217   info_array[0]=64;
1218   info_array[1]=32;
1219   info_array[2]=size>>11;
1220 
1221 #if defined(DEBUG_BIOSPARAM)
1222   if(HOSTDATA(shpnt)->debug & debug_biosparam)
1223   {
1224     printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
1225            info_array[0], info_array[1], info_array[2]);
1226     printk("WARNING: check, if the bios geometry is correct.\n");
1227   }
1228 #endif
1229 
1230   return 0;
1231 }
1232 
1233 /*
1234  *  Internal done function
1235  */
1236 void aha152x_done(struct Scsi_Host *shpnt, int error)
     /*  */
1237 {
1238   unsigned long flags;
1239   Scsi_Cmnd *done_SC;
1240 
1241 #if defined(DEBUG_DONE)
1242   if(HOSTDATA(shpnt)->debug & debug_done)
1243   {
1244     printk("\naha152x: done(), ");
1245     disp_ports(shpnt);
1246   }
1247 #endif
1248 
1249   if (CURRENT_SC)
1250     {
1251 #if defined(DEBUG_DONE)
1252       if(HOSTDATA(shpnt)->debug & debug_done)
1253         printk("done(%x), ", error);
1254 #endif
1255 
1256       save_flags(flags);
1257       cli();
1258 
1259       done_SC = CURRENT_SC;
1260       CURRENT_SC = NULL;
1261 
1262       /* turn led off, when no commands are in the driver */
1263       HOSTDATA(shpnt)->commands--;
1264       if(!HOSTDATA(shpnt)->commands)
1265         SETPORT(PORTA, 0);                                  /* turn led off */
1266 
1267 #if defined(DEBUG_QUEUES)
1268       if(HOSTDATA(shpnt)->debug & debug_queues) 
1269         printk("ok (%d), ", HOSTDATA(shpnt)->commands);
1270 #endif
1271       restore_flags(flags);
1272 
1273       SETPORT(SIMODE0, DISCONNECTED_SC ? ENSELDI : 0);
1274       SETPORT(SIMODE1, ISSUE_SC ? ENBUSFREE : 0);
1275 
1276 #if defined(DEBUG_PHASES)
1277       if(HOSTDATA(shpnt)->debug & debug_phases)
1278         printk("BUS FREE loop, ");
1279 #endif
1280       while(TESTLO(SSTAT1, BUSFREE))
1281         barrier();
1282 #if defined(DEBUG_PHASES)
1283       if(HOSTDATA(shpnt)->debug & debug_phases)
1284         printk("BUS FREE\n");
1285 #endif
1286 
1287       done_SC->result = error;
1288       if(done_SC->scsi_done)
1289         {
1290 #if defined(DEBUG_DONE)
1291           if(HOSTDATA(shpnt)->debug & debug_done)
1292             printk("calling scsi_done, ");
1293 #endif
1294           done_SC->scsi_done(done_SC);
1295 #if defined(DEBUG_DONE)
1296           if(HOSTDATA(shpnt)->debug & debug_done)
1297             printk("done returned, ");
1298 #endif
1299         }
1300       else
1301         panic("aha152x: current_SC->scsi_done() == NULL");
1302     }
1303   else
1304     aha152x_panic(shpnt, "done() called outside of command");
1305 }
1306 
1307 /*
1308  * Interrupts handler (main routine of the driver)
1309  */
1310 void aha152x_intr(int irqno, void *dev_id, struct pt_regs * regs)
     /*  */
1311 {
1312   struct Scsi_Host *shpnt = aha152x_host[irqno-IRQ_MIN];
1313   unsigned int flags;
1314   int done=0, phase;
1315 
1316 #if defined(DEBUG_RACE)
1317   enter_driver("intr");
1318 #else
1319 #if defined(DEBUG_INTR)
1320   if(HOSTDATA(shpnt)->debug & debug_intr)
1321     printk("\naha152x: intr(), ");
1322 #endif
1323 #endif
1324 
1325   /* no more interrupts from the controller, while we busy.
1326      INTEN has to be restored, when we're ready to leave
1327      intr(). To avoid race conditions we have to return
1328      immediately afterwards. */
1329   CLRBITS(DMACNTRL0, INTEN);
1330   sti();  /* Yes, sti() really needs to be here */
1331 
1332   /* disconnected target is trying to reconnect.
1333      Only possible, if we have disconnected nexuses and
1334      nothing is occupying the bus.
1335   */
1336   if(TESTHI(SSTAT0, SELDI) &&
1337       DISCONNECTED_SC &&
1338       (!CURRENT_SC || (CURRENT_SC->SCp.phase & in_selection)) )
1339     {
1340       int identify_msg, target, i;
1341 
1342       /* Avoid conflicts when a target reconnects
1343          while we are trying to connect to another. */
1344       if(CURRENT_SC)
1345         {
1346 #if defined(DEBUG_QUEUES)
1347           if(HOSTDATA(shpnt)->debug & debug_queues)
1348           printk("i+, ");
1349 #endif
1350           save_flags(flags);
1351           cli();
1352           append_SC(&ISSUE_SC, CURRENT_SC);
1353           CURRENT_SC=NULL;
1354           restore_flags(flags);
1355         }
1356 
1357       /* disable sequences */
1358       SETPORT(SCSISEQ, 0);
1359       SETPORT(SSTAT0, CLRSELDI);
1360       SETPORT(SSTAT1, CLRBUSFREE);
1361 
1362 #if defined(DEBUG_QUEUES) || defined(DEBUG_PHASES)
1363       if(HOSTDATA(shpnt)->debug & (debug_queues|debug_phases))
1364         printk("reselected, ");
1365 #endif
1366 
1367       i = GETPORT(SELID) & ~(1 << shpnt->this_id);
1368       target=0;
1369       if(i)
1370         for(; (i & 1)==0; target++, i>>=1)
1371           ;
1372       else
1373         aha152x_panic(shpnt, "reconnecting target unknown");
1374 
1375 #if defined(DEBUG_QUEUES)
1376       if(HOSTDATA(shpnt)->debug & debug_queues)
1377         printk("SELID=%02x, target=%d, ", GETPORT(SELID), target);
1378 #endif
1379       SETPORT(SCSIID, (shpnt->this_id << OID_) | target);
1380       SETPORT(SCSISEQ, ENRESELI);
1381 
1382       if(TESTLO(SSTAT0, SELDI))
1383         aha152x_panic(shpnt, "RESELI failed");
1384 
1385       SETPORT(SCSIRATE, HOSTDATA(shpnt)->syncrate[target]&0x7f);
1386 
1387       SETPORT(SCSISIG, P_MSGI);
1388 
1389       /* Get identify message */
1390       if((i=getphase(shpnt))!=P_MSGI)
1391         {
1392           printk("target doesn't enter MSGI to identify (phase=%02x)\n", i);
1393           aha152x_panic(shpnt, "unknown lun");
1394         }
1395       SETPORT(SCSISEQ, 0);
1396 
1397       SETPORT(SXFRCTL0, CH1);
1398 
1399       identify_msg = GETPORT(SCSIBUS);
1400 
1401       if(!(identify_msg & IDENTIFY_BASE))
1402         {
1403           printk("target=%d, inbound message (%02x) != IDENTIFY\n",
1404                  target, identify_msg);
1405           aha152x_panic(shpnt, "unknown lun");
1406         }
1407 
1408 
1409 #if defined(DEBUG_QUEUES)
1410       if(HOSTDATA(shpnt)->debug & debug_queues)
1411         printk("identify=%02x, lun=%d, ", identify_msg, identify_msg & 0x3f);
1412 #endif
1413 
1414       save_flags(flags);
1415       cli();
1416 
1417 #if defined(DEBUG_QUEUES)
1418       if(HOSTDATA(shpnt)->debug & debug_queues)
1419         printk("d-, ");
1420 #endif
1421       CURRENT_SC = remove_SC(&DISCONNECTED_SC,
1422                               target,
1423                              identify_msg & 0x3f);
1424 
1425       if(!CURRENT_SC)
1426         {
1427           printk("lun=%d, ", identify_msg & 0x3f);
1428           aha152x_panic(shpnt, "no disconnected command for that lun");
1429         }
1430 
1431       CURRENT_SC->SCp.phase &= ~disconnected;
1432       restore_flags(flags);
1433 
1434       make_acklow(shpnt);
1435       if(getphase(shpnt)!=P_MSGI) {
1436       SETPORT(SIMODE0, 0);
1437       SETPORT(SIMODE1, ENPHASEMIS|ENBUSFREE);
1438 #if defined(DEBUG_RACE)
1439       leave_driver("(reselected) intr");
1440 #endif
1441       SETBITS(DMACNTRL0, INTEN);
1442       return;
1443     }
1444     }
1445   
1446   /* Check, if we aren't busy with a command */
1447   if(!CURRENT_SC)
1448     {
1449       /* bus is free to issue a queued command */
1450       if(TESTHI(SSTAT1, BUSFREE) && ISSUE_SC)
1451         {
1452           save_flags(flags);
1453           cli();
1454 #if defined(DEBUG_QUEUES)
1455           if(HOSTDATA(shpnt)->debug & debug_queues)
1456             printk("i-, ");
1457 #endif
1458           CURRENT_SC = remove_first_SC(&ISSUE_SC);
1459           restore_flags(flags);
1460 
1461 #if defined(DEBUG_INTR) || defined(DEBUG_SELECTION) || defined(DEBUG_PHASES)
1462           if(HOSTDATA(shpnt)->debug & (debug_intr|debug_selection|debug_phases))
1463             printk("issuing command, ");
1464 #endif
1465           CURRENT_SC->SCp.phase = in_selection;
1466 
1467 #if defined(DEBUG_INTR) || defined(DEBUG_SELECTION) || defined(DEBUG_PHASES)
1468           if(HOSTDATA(shpnt)->debug & (debug_intr|debug_selection|debug_phases))
1469             printk("selecting %d, ", CURRENT_SC->target); 
1470 #endif
1471           SETPORT(SCSIID, (shpnt->this_id << OID_) | CURRENT_SC->target);
1472 
1473           /* Enable interrupts for SELECTION OUT DONE and SELECTION OUT INITIATED */
1474           SETPORT(SXFRCTL1, HOSTDATA(shpnt)->parity ? (ENSPCHK|ENSTIMER) : ENSTIMER);
1475 
1476           /* enable interrupts for SELECTION OUT DONE and SELECTION TIME OUT */
1477           SETPORT(SIMODE0, ENSELDO | (DISCONNECTED_SC ? ENSELDI : 0));
1478           SETPORT(SIMODE1, ENSELTIMO);
1479 
1480           /* Enable SELECTION OUT sequence */
1481           SETBITS(SCSISEQ, ENSELO | ENAUTOATNO);
1482         
1483         }
1484       else
1485         {
1486           /* No command we are busy with and no new to issue */
1487           printk("aha152x: ignoring spurious interrupt, nothing to do\n");
1488           if(TESTHI(DMACNTRL0, SWINT)) {
1489             printk("aha152x: SWINT is set!  Why?\n");
1490             CLRBITS(DMACNTRL0, SWINT);
1491           }
1492           show_queues(shpnt);
1493         }
1494 
1495 #if defined(DEBUG_RACE)
1496           leave_driver("(selecting) intr");
1497 #endif
1498           SETBITS(DMACNTRL0, INTEN);
1499           return;
1500         }
1501 
1502   /* the bus is busy with something */
1503 
1504 #if defined(DEBUG_INTR)
1505   if(HOSTDATA(shpnt)->debug & debug_intr)
1506     disp_ports(shpnt);
1507 #endif
1508 
1509   /* we are waiting for the result of a selection attempt */
1510   if(CURRENT_SC->SCp.phase & in_selection)
1511     {
1512       if(TESTLO(SSTAT1, SELTO))
1513         /* no timeout */
1514         if(TESTHI(SSTAT0, SELDO))
1515           {
1516             /* clear BUS FREE interrupt */
1517             SETPORT(SSTAT1, CLRBUSFREE);
1518 
1519             /* Disable SELECTION OUT sequence */
1520             CLRBITS(SCSISEQ, ENSELO|ENAUTOATNO);
1521 
1522             /* Disable SELECTION OUT DONE interrupt */
1523             CLRBITS(SIMODE0, ENSELDO);
1524             CLRBITS(SIMODE1, ENSELTIMO);
1525 
1526             if(TESTLO(SSTAT0, SELDO))
1527               {
1528                 printk("aha152x: passing bus free condition\n");
1529 
1530 #if defined(DEBUG_RACE)
1531                 leave_driver("(passing bus free) intr");
1532 #endif
1533                 SETBITS(DMACNTRL0, INTEN);
1534 
1535                 if(CURRENT_SC->SCp.phase & aborted)
1536                   {
1537                     HOSTDATA(shpnt)->abort_result=SCSI_ABORT_ERROR;
1538                     HOSTDATA(shpnt)->abortion_complete++;
1539                   }
1540 
1541                 aha152x_done(shpnt, DID_NO_CONNECT << 16);
1542                 return;
1543               }
1544 #if defined(DEBUG_SELECTION) || defined(DEBUG_PHASES)
1545             if(HOSTDATA(shpnt)->debug & (debug_selection|debug_phases))
1546               printk("SELDO (SELID=%x), ", GETPORT(SELID));
1547 #endif
1548 
1549             /* selection was done */
1550             SETPORT(SSTAT0, CLRSELDO);
1551 
1552 #if defined(DEBUG_ABORT)
1553             if((HOSTDATA(shpnt)->debug & debug_abort) && (CURRENT_SC->SCp.phase & aborted))
1554               printk("(ABORT) target selected, ");
1555 #endif
1556 
1557             CURRENT_SC->SCp.phase &= ~in_selection;
1558             CURRENT_SC->SCp.phase |= in_other;
1559 
1560             ADDMSG(IDENTIFY(HOSTDATA(shpnt)->reconnect,CURRENT_SC->lun));
1561 
1562             if(!(SYNCRATE&0x80) && HOSTDATA(shpnt)->synchronous)
1563               {
1564                 ADDMSG(EXTENDED_MESSAGE);
1565                 ADDMSG(3);
1566                 ADDMSG(EXTENDED_SDTR);
1567                 ADDMSG(50);
1568                 ADDMSG(8);
1569 
1570                 printk("outbound SDTR: ");
1571                 print_msg(&MSG(MSGLEN-5));
1572 
1573                 SYNCRATE=0x80;
1574                 CURRENT_SC->SCp.phase |= in_sync;
1575               }
1576 
1577 #if defined(DEBUG_RACE)
1578             leave_driver("(SELDO) intr");
1579 #endif
1580             SETPORT(SCSIRATE, SYNCRATE&0x7f);
1581 
1582             SETPORT(SCSISIG, P_MSGO);
1583 
1584             SETPORT(SIMODE0, 0);
1585             SETPORT(SIMODE1, ENREQINIT|ENBUSFREE);
1586             SETBITS(DMACNTRL0, INTEN);
1587             return;
1588           }
1589         else
1590           aha152x_panic(shpnt, "neither timeout nor selection\007");
1591       else
1592         {
1593 #if defined(DEBUG_SELECTION) || defined(DEBUG_PHASES)
1594           if(HOSTDATA(shpnt)->debug & (debug_selection|debug_phases))
1595           printk("SELTO, ");
1596 #endif
1597           /* end selection attempt */
1598           CLRBITS(SCSISEQ, ENSELO|ENAUTOATNO);
1599 
1600           /* timeout */
1601           SETPORT(SSTAT1, CLRSELTIMO);
1602 
1603           SETPORT(SIMODE0, DISCONNECTED_SC ? ENSELDI : 0);
1604           SETPORT(SIMODE1, ISSUE_SC ? ENBUSFREE : 0);
1605           SETBITS(DMACNTRL0, INTEN);
1606 #if defined(DEBUG_RACE)
1607           leave_driver("(SELTO) intr");
1608 #endif
1609 
1610           if(CURRENT_SC->SCp.phase & aborted)
1611             {
1612 #if defined(DEBUG_ABORT)
1613               if(HOSTDATA(shpnt)->debug & debug_abort)
1614                 printk("(ABORT) selection timeout, ");
1615 #endif
1616               HOSTDATA(shpnt)->abort_result=SCSI_ABORT_ERROR;
1617               HOSTDATA(shpnt)->abortion_complete++;
1618             }
1619 
1620           if(TESTLO(SSTAT0, SELINGO))
1621             /* ARBITRATION not won */
1622             aha152x_done(shpnt, DID_BUS_BUSY << 16);
1623           else
1624             /* ARBITRATION won, but SELECTION failed */
1625             aha152x_done(shpnt, DID_NO_CONNECT << 16);
1626 
1627           return;
1628         }
1629     }
1630 
1631   /* enable interrupt, when target leaves current phase */
1632   phase = getphase(shpnt);
1633   if(!(phase & ~P_MASK))                                      /* "real" phase */
1634     SETPORT(SCSISIG, phase);
1635   SETPORT(SSTAT1, CLRPHASECHG);
1636   CURRENT_SC->SCp.phase =
1637     (CURRENT_SC->SCp.phase & ~((P_MASK|1)<<16)) | (phase << 16);
1638 
1639   /* information transfer phase */
1640   switch(phase)
1641     {
1642     case P_MSGO:                                               /* MESSAGE OUT */
1643       {
1644         int i, identify=0, abort=0;
1645 
1646 #if defined(DEBUG_INTR) || defined(DEBUG_MSGO) || defined(DEBUG_PHASES)
1647         if(HOSTDATA(shpnt)->debug & (debug_intr|debug_msgo|debug_phases))
1648           printk("MESSAGE OUT, ");
1649 #endif
1650         if(MSGLEN==0)
1651           {
1652             ADDMSG(MESSAGE_REJECT);
1653 #if defined(DEBUG_MSGO)
1654             if(HOSTDATA(shpnt)->debug & debug_msgo)
1655               printk("unexpected MSGO; rejecting, ");
1656 #endif
1657           }
1658         
1659         
1660         CLRBITS(SXFRCTL0, ENDMA);
1661         
1662         SETPORT(SIMODE0, 0);
1663         SETPORT(SIMODE1, ENPHASEMIS|ENREQINIT|ENBUSFREE);
1664         
1665         /* wait for data latch to become ready or a phase change */
1666         while(TESTLO(DMASTAT, INTSTAT))
1667           barrier();
1668         
1669 #if defined(DEBUG_MSGO)
1670         if(HOSTDATA(shpnt)->debug & debug_msgo)
1671           {
1672             int i;
1673             
1674             printk("messages (");
1675             for(i=0; i<MSGLEN; i+=print_msg(&MSG(i)), printk(" "))
1676               ;
1677             printk("), ");
1678             }
1679 #endif
1680         
1681         for(i=0; i<MSGLEN && TESTLO(SSTAT1, PHASEMIS); i++)
1682             {
1683 #if defined(DEBUG_MSGO)
1684             if(HOSTDATA(shpnt)->debug & debug_msgo)
1685               printk("%x ", MSG(i));
1686 #endif
1687             if(i==MSGLEN-1)
1688               {
1689                 /* Leave MESSAGE OUT after transfer */
1690                 SETPORT(SSTAT1, CLRATNO);
1691             }
1692           
1693             SETPORT(SCSIDAT, MSG(i));
1694 
1695             make_acklow(shpnt);
1696             getphase(shpnt);
1697 
1698             if(MSG(i)==IDENTIFY(HOSTDATA(shpnt)->reconnect,CURRENT_SC->lun))
1699               identify++;
1700 
1701             if(MSG(i)==ABORT)
1702               abort++;
1703 
1704           }
1705 
1706         MSGLEN=0;
1707 
1708         if(identify)
1709           CURRENT_SC->SCp.phase |= sent_ident;
1710 
1711         if(abort)
1712           {
1713             /* revive abort(); abort() enables interrupts */
1714             HOSTDATA(shpnt)->abort_result=SCSI_ABORT_SUCCESS;
1715             HOSTDATA(shpnt)->abortion_complete++;
1716 
1717             CURRENT_SC->SCp.phase &= ~(P_MASK<<16);
1718 
1719             /* exit */
1720             SETBITS(DMACNTRL0, INTEN);
1721 #if defined(DEBUG_RACE)
1722             leave_driver("(ABORT) intr");
1723 #endif
1724             aha152x_done(shpnt, DID_ABORT<<16);
1725             return;
1726           }
1727       }
1728       break;
1729 
1730     case P_CMD:                                          /* COMMAND phase */
1731 #if defined(DEBUG_INTR) || defined(DEBUG_CMD) || defined(DEBUG_PHASES)
1732       if(HOSTDATA(shpnt)->debug & (debug_intr|debug_cmd|debug_phases))
1733         printk("COMMAND, ");
1734 #endif
1735       if(!(CURRENT_SC->SCp.sent_command))
1736         {
1737           int i;
1738 
1739           CLRBITS(SXFRCTL0, ENDMA);
1740 
1741           SETPORT(SIMODE0, 0);
1742           SETPORT(SIMODE1, ENPHASEMIS|ENREQINIT|ENBUSFREE);
1743   
1744           /* wait for data latch to become ready or a phase change */
1745           while(TESTLO(DMASTAT, INTSTAT))
1746             barrier();
1747   
1748           for(i=0; i<CURRENT_SC->cmd_len && TESTLO(SSTAT1, PHASEMIS); i++)
1749           {
1750               SETPORT(SCSIDAT, CURRENT_SC->cmnd[i]);
1751 
1752               make_acklow(shpnt);
1753               getphase(shpnt);
1754           }
1755 
1756           if(i<CURRENT_SC->cmd_len && TESTHI(SSTAT1, PHASEMIS))
1757             aha152x_panic(shpnt, "target left COMMAND");
1758 
1759           CURRENT_SC->SCp.sent_command++;
1760         }
1761       else
1762         aha152x_panic(shpnt, "Nothing to send while in COMMAND");
1763       break;
1764 
1765     case P_MSGI:                                          /* MESSAGE IN phase */
1766       {
1767         int start_sync=0;
1768         
1769 #if defined(DEBUG_INTR) || defined(DEBUG_MSGI) || defined(DEBUG_PHASES)
1770         if(HOSTDATA(shpnt)->debug & (debug_intr|debug_msgi|debug_phases))
1771         printk("MESSAGE IN, ");
1772 #endif
1773         SETPORT(SXFRCTL0, CH1);
1774 
1775         SETPORT(SIMODE0, 0);
1776         SETPORT(SIMODE1, ENBUSFREE);
1777   
1778         while(phase == P_MSGI) 
1779         {
1780             CURRENT_SC->SCp.Message = GETPORT(SCSIDAT);
1781             switch(CURRENT_SC->SCp.Message)
1782             {
1783             case DISCONNECT:
1784 #if defined(DEBUG_MSGI) || defined(DEBUG_PHASES)
1785                 if(HOSTDATA(shpnt)->debug & (debug_msgi|debug_phases))
1786                 printk("target disconnected, ");
1787 #endif
1788                 CURRENT_SC->SCp.Message = 0;
1789                 CURRENT_SC->SCp.phase   |= disconnected;
1790                 if(!HOSTDATA(shpnt)->reconnect)
1791                   aha152x_panic(shpnt, "target was not allowed to disconnect");
1792               break;
1793         
1794             case COMMAND_COMPLETE:
1795 #if defined(DEBUG_MSGI) || defined(DEBUG_PHASES)
1796                 if(HOSTDATA(shpnt)->debug & (debug_msgi|debug_phases))
1797                   printk("inbound message (COMMAND COMPLETE), ");
1798 #endif
1799               done++;
1800               break;
1801 
1802             case MESSAGE_REJECT:
1803                 if(CURRENT_SC->SCp.phase & in_sync)
1804                   { 
1805                     CURRENT_SC->SCp.phase &= ~in_sync;
1806                     SYNCRATE=0x80;
1807                     printk("synchronous rejected, ");
1808                   }
1809                 else
1810                   printk("inbound message (MESSAGE REJECT), ");
1811 #if defined(DEBUG_MSGI)
1812                 if(HOSTDATA(shpnt)->debug & debug_msgi)
1813                   printk("inbound message (MESSAGE REJECT), ");
1814 #endif
1815               break;
1816 
1817             case SAVE_POINTERS:
1818 #if defined(DEBUG_MSGI)
1819                 if(HOSTDATA(shpnt)->debug & debug_msgi)
1820                   printk("inbound message (SAVE DATA POINTERS), ");
1821 #endif
1822               break;
1823 
1824             case EXTENDED_MESSAGE:
1825               { 
1826                   char buffer[16];
1827                   int  i;
1828 
1829 #if defined(DEBUG_MSGI)
1830                   if(HOSTDATA(shpnt)->debug & debug_msgi)
1831                     printk("inbound message (EXTENDED MESSAGE), ");
1832 #endif
1833                   make_acklow(shpnt);
1834                   if(getphase(shpnt)!=P_MSGI)
1835                   break;
1836   
1837                   buffer[0]=EXTENDED_MESSAGE;
1838                   buffer[1]=GETPORT(SCSIDAT);
1839                   
1840                   for(i=0; i<buffer[1] &&
1841                       (make_acklow(shpnt), getphase(shpnt)==P_MSGI); i++)
1842                     buffer[2+i]=GETPORT(SCSIDAT);
1843 
1844 #if defined(DEBUG_MSGI)
1845                   if(HOSTDATA(shpnt)->debug & debug_msgi)
1846                     print_msg(buffer);
1847 #endif
1848 
1849                   switch(buffer [2])
1850                     {
1851                     case EXTENDED_SDTR:
1852                       {
1853                         long ticks;
1854                         
1855                         if(buffer[1]!=3)
1856                           aha152x_panic(shpnt, "SDTR message length != 3");
1857                         
1858                         if(!HOSTDATA(shpnt)->synchronous)
1859                   break;
1860 
1861                         printk("inbound SDTR: "); print_msg(buffer);
1862                         
1863                         ticks=(buffer[3]*4+49)/50;
1864 
1865                         if(CURRENT_SC->SCp.phase & in_sync)
1866                   {
1867                             /* we initiated SDTR */
1868                             if(ticks>9 || buffer[4]<1 || buffer[4]>8)
1869                               aha152x_panic(shpnt, "received SDTR invalid");
1870                             
1871                             SYNCRATE |= ((ticks-2)<<4) + buffer[4];
1872                           }
1873                         else if(ticks<=9 && buffer[4]>=1)
1874                           {
1875                             if(buffer[4]>8)
1876                               buffer[4]=8;
1877                             
1878                             ADDMSG(EXTENDED_MESSAGE);
1879                             ADDMSG(3);
1880                             ADDMSG(EXTENDED_SDTR);
1881                             if(ticks<4)
1882                               {
1883                                     ticks=4;
1884                                     ADDMSG(50);
1885                               }
1886                       else
1887                               ADDMSG(buffer[3]);
1888                             
1889                             ADDMSG(buffer[4]);
1890                             
1891                             printk("outbound SDTR: ");
1892                             print_msg(&MSG(MSGLEN-5));
1893                             
1894                             CURRENT_SC->SCp.phase |= in_sync;
1895                             
1896                             SYNCRATE |= ((ticks-2)<<4) + buffer[4];
1897                             
1898                             start_sync++;
1899                   }
1900                         else
1901                   {
1902                             /* requested SDTR is too slow, do it asynchronously */
1903                             ADDMSG(MESSAGE_REJECT);
1904                             SYNCRATE = 0;
1905                           } 
1906                         
1907                         SETPORT(SCSIRATE, SYNCRATE&0x7f);
1908                       }
1909                       break;
1910                       
1911                     case EXTENDED_MODIFY_DATA_POINTER:
1912                     case EXTENDED_EXTENDED_IDENTIFY:
1913                     case EXTENDED_WDTR:
1914                     default:
1915                       ADDMSG(MESSAGE_REJECT);
1916                       break;
1917                   }
1918               }
1919               break;
1920        
1921             default:
1922                 printk("unsupported inbound message %x, ", 
1923                        CURRENT_SC->SCp.Message);
1924               break;
1925 
1926             }
1927 
1928             make_acklow(shpnt);
1929             phase=getphase(shpnt);
1930         } 
1931 
1932         if(start_sync)
1933           CURRENT_SC->SCp.phase |= in_sync;
1934         else
1935           CURRENT_SC->SCp.phase &= ~in_sync;
1936         
1937         if(MSGLEN>0)
1938           SETPORT(SCSISIG, P_MSGI|ATNO);
1939         
1940       /* clear SCSI fifo on BUSFREE */
1941       if(phase==P_BUSFREE)
1942         SETPORT(SXFRCTL0, CH1|CLRCH1);
1943 
1944         if(CURRENT_SC->SCp.phase & disconnected)
1945         {
1946           save_flags(flags);
1947           cli();
1948 #if defined(DEBUG_QUEUES)
1949             if(HOSTDATA(shpnt)->debug & debug_queues)
1950             printk("d+, ");
1951 #endif
1952             append_SC(&DISCONNECTED_SC, CURRENT_SC);
1953             CURRENT_SC->SCp.phase |= 1<<16;
1954             CURRENT_SC = NULL;
1955           restore_flags(flags);
1956 
1957             SETBITS(SCSISEQ, ENRESELI);
1958 
1959             SETPORT(SIMODE0, DISCONNECTED_SC ? ENSELDI : 0);
1960             SETPORT(SIMODE1, ISSUE_SC ? ENBUSFREE : 0);
1961 
1962             SETBITS(DMACNTRL0, INTEN);
1963           return;
1964         }
1965       }
1966       break;
1967 
1968     case P_STATUS:                                         /* STATUS IN phase */
1969 #if defined(DEBUG_STATUS) || defined(DEBUG_INTR) || defined(DEBUG_PHASES)
1970       if(HOSTDATA(shpnt)->debug & (debug_status|debug_intr|debug_phases))
1971         printk("STATUS, ");
1972 #endif
1973       SETPORT(SXFRCTL0, CH1);
1974 
1975       SETPORT(SIMODE0, 0);
1976       SETPORT(SIMODE1, ENREQINIT|ENBUSFREE);
1977 
1978       if(TESTHI(SSTAT1, PHASEMIS))
1979         printk("aha152x: passing STATUS phase");
1980         
1981       CURRENT_SC->SCp.Status = GETPORT(SCSIBUS);
1982       make_acklow(shpnt);
1983       getphase(shpnt);
1984 
1985 #if defined(DEBUG_STATUS)
1986       if(HOSTDATA(shpnt)->debug & debug_status)
1987       {
1988         printk("inbound status ");
1989           print_status(CURRENT_SC->SCp.Status);
1990         printk(", ");
1991       }
1992 #endif
1993       break;
1994 
1995     case P_DATAI:                                            /* DATA IN phase */
1996       {
1997         int fifodata, data_count, done;
1998 
1999 #if defined(DEBUG_DATAI) || defined(DEBUG_INTR) || defined(DEBUG_PHASES)
2000         if(HOSTDATA(shpnt)->debug & (debug_datai|debug_intr|debug_phases))
2001           printk("DATA IN, ");
2002 #endif
2003 
2004 #if 0
2005         if(GETPORT(FIFOSTAT) || GETPORT(SSTAT2) & (SFULL|SFCNT))
2006           printk("aha152x: P_DATAI: %d(%d) bytes left in FIFO, resetting\n",
2007                  GETPORT(FIFOSTAT), GETPORT(SSTAT2) & (SFULL|SFCNT));
2008 #endif
2009 
2010         /* reset host fifo */
2011         SETPORT(DMACNTRL0, RSTFIFO);
2012         SETPORT(DMACNTRL0, RSTFIFO|ENDMA);
2013 
2014         SETPORT(SXFRCTL0, CH1|SCSIEN|DMAEN);
2015 
2016         SETPORT(SIMODE0, 0);
2017         SETPORT(SIMODE1, ENPHASEMIS|ENBUSFREE);
2018 
2019         /* done is set when the FIFO is empty after the target left DATA IN */
2020         done=0;
2021       
2022         /* while the target stays in DATA to transfer data */
2023         while (!done) 
2024           {
2025 #if defined(DEBUG_DATAI)
2026             if(HOSTDATA(shpnt)->debug & debug_datai)
2027               printk("expecting data, ");
2028 #endif
2029             /* wait for PHASEMIS or full FIFO */
2030             while(TESTLO (DMASTAT, DFIFOFULL|INTSTAT))
2031               barrier();
2032 
2033 #if defined(DEBUG_DATAI)
2034             if(HOSTDATA(shpnt)->debug & debug_datai)
2035               printk("ok, ");
2036 #endif
2037             
2038             if(TESTHI(DMASTAT, DFIFOFULL))
2039               fifodata=GETPORT(FIFOSTAT);
2040             else
2041               {
2042                 /* wait for SCSI fifo to get empty */
2043                 while(TESTLO(SSTAT2, SEMPTY))
2044                   barrier();
2045 
2046                 /* rest of data in FIFO */
2047                 fifodata=GETPORT(FIFOSTAT);
2048 #if defined(DEBUG_DATAI)
2049                 if(HOSTDATA(shpnt)->debug & debug_datai)
2050                   printk("last transfer, ");
2051 #endif
2052                 done=1;
2053               }
2054   
2055 #if defined(DEBUG_DATAI)
2056             if(HOSTDATA(shpnt)->debug & debug_datai)
2057               printk("fifodata=%d, ", fifodata);
2058 #endif
2059 
2060             while(fifodata && CURRENT_SC->SCp.this_residual)
2061               {
2062                 data_count=fifodata;
2063   
2064                 /* limit data transfer to size of first sg buffer */
2065                 if (data_count > CURRENT_SC->SCp.this_residual)
2066                   data_count = CURRENT_SC->SCp.this_residual;
2067   
2068                 fifodata -= data_count;
2069 
2070 #if defined(DEBUG_DATAI)
2071                 if(HOSTDATA(shpnt)->debug & debug_datai)
2072                   printk("data_count=%d, ", data_count);
2073 #endif
2074   
2075                 if(data_count&1)
2076                   {
2077                     /* get a single byte in byte mode */
2078                     SETBITS(DMACNTRL0, _8BIT);
2079                     *CURRENT_SC->SCp.ptr++ = GETPORT(DATAPORT);
2080                     CURRENT_SC->SCp.this_residual--;
2081                   }
2082                 if(data_count>1)
2083                   {
2084                     CLRBITS(DMACNTRL0, _8BIT);
2085                     data_count >>= 1; /* Number of words */
2086                     insw(DATAPORT, CURRENT_SC->SCp.ptr, data_count);
2087 #if defined(DEBUG_DATAI)
2088                     if(HOSTDATA(shpnt)->debug & debug_datai)
2089                       /* show what comes with the last transfer */
2090                       if(done)
2091                         {
2092 #ifdef 0
2093                           int           i;
2094                           unsigned char *data;
2095 #endif
2096   
2097                           printk("data on last transfer (%d bytes) ",
2098                                  2*data_count);
2099 #ifdef 0
2100                           printk("data on last transfer (%d bytes: ",
2101                                  2*data_count);
2102                           data = (unsigned char *) CURRENT_SC->SCp.ptr;
2103                           for(i=0; i<2*data_count; i++)
2104                             printk("%2x ", *data++);
2105                           printk("), ");
2106 #endif
2107                         }
2108 #endif
2109                     CURRENT_SC->SCp.ptr           += 2 * data_count;
2110                     CURRENT_SC->SCp.this_residual -= 2 * data_count;
2111                   }
2112               
2113                 /* if this buffer is full and there are more buffers left */
2114                 if (!CURRENT_SC->SCp.this_residual &&
2115                     CURRENT_SC->SCp.buffers_residual)
2116                   {
2117                     /* advance to next buffer */
2118                     CURRENT_SC->SCp.buffers_residual--;
2119                     CURRENT_SC->SCp.buffer++;
2120                     CURRENT_SC->SCp.ptr =
2121                       CURRENT_SC->SCp.buffer->address;
2122                     CURRENT_SC->SCp.this_residual =
2123                       CURRENT_SC->SCp.buffer->length;
2124                   } 
2125               }
2126  
2127             /*
2128              * Fifo should be empty
2129              */
2130             if(fifodata>0)
2131               {
2132                 printk("aha152x: more data than expected (%d bytes)\n",
2133                        GETPORT(FIFOSTAT));
2134                 SETBITS(DMACNTRL0, _8BIT);
2135                 printk("aha152x: data (");
2136                 while(fifodata--)
2137                   printk("%2x ", GETPORT(DATAPORT));
2138                 printk(")\n");
2139               }
2140 
2141 #if defined(DEBUG_DATAI)
2142             if(HOSTDATA(shpnt)->debug & debug_datai)
2143               if(!fifodata)
2144                 printk("fifo empty, ");
2145               else
2146                 printk("something left in fifo, ");
2147 #endif
2148           }
2149 
2150 #if defined(DEBUG_DATAI)
2151         if((HOSTDATA(shpnt)->debug & debug_datai) &&
2152            (CURRENT_SC->SCp.buffers_residual ||
2153             CURRENT_SC->SCp.this_residual))
2154           printk("left buffers (buffers=%d, bytes=%d), ",
2155                  CURRENT_SC->SCp.buffers_residual, 
2156                  CURRENT_SC->SCp.this_residual);
2157 #endif
2158         /* transfer can be considered ended, when SCSIEN reads back zero */
2159         CLRBITS(SXFRCTL0, SCSIEN|DMAEN);
2160         while(TESTHI(SXFRCTL0, SCSIEN))
2161           barrier();
2162         CLRBITS(DMACNTRL0, ENDMA);
2163 
2164 #if defined(DEBUG_DATAI) || defined(DEBUG_INTR)
2165         if(HOSTDATA(shpnt)->debug & (debug_datai|debug_intr))
2166           printk("got %d bytes, ", GETSTCNT());
2167 #endif
2168 
2169         CURRENT_SC->SCp.have_data_in++;
2170       }
2171       break;
2172 
2173     case P_DATAO:                                           /* DATA OUT phase */
2174       {
2175         int data_count;
2176 
2177 #if defined(DEBUG_DATAO) || defined(DEBUG_INTR) || defined(DEBUG_PHASES)
2178         if(HOSTDATA(shpnt)->debug & (debug_datao|debug_intr|debug_phases))
2179           printk("DATA OUT, ");
2180 #endif
2181 #if defined(DEBUG_DATAO)
2182         if(HOSTDATA(shpnt)->debug & debug_datao)
2183           printk("got data to send (bytes=%d, buffers=%d), ",
2184                  CURRENT_SC->SCp.this_residual,
2185                  CURRENT_SC->SCp.buffers_residual);
2186 #endif
2187 
2188         if(GETPORT(FIFOSTAT) || GETPORT(SSTAT2) & (SFULL|SFCNT))
2189           {
2190             printk("%d(%d) left in FIFO, ",
2191                    GETPORT(FIFOSTAT), GETPORT(SSTAT2) & (SFULL|SFCNT));
2192             aha152x_panic(shpnt, "FIFO should be empty");
2193           }
2194 
2195         SETPORT(SXFRCTL0, CH1|CLRSTCNT|CLRCH1);
2196         SETPORT(SXFRCTL0, SCSIEN|DMAEN|CH1);
2197         
2198         SETPORT(DMACNTRL0, WRITE_READ|RSTFIFO);
2199         SETPORT(DMACNTRL0, ENDMA|WRITE_READ);
2200 
2201         SETPORT(SIMODE0, 0);
2202         SETPORT(SIMODE1, ENPHASEMIS|ENBUSFREE);
2203 
2204         /* while current buffer is not empty or
2205            there are more buffers to transfer */
2206         while(TESTLO(SSTAT1, PHASEMIS) &&
2207               (CURRENT_SC->SCp.this_residual ||
2208                CURRENT_SC->SCp.buffers_residual))
2209           {
2210 #if defined(DEBUG_DATAO)
2211             if(HOSTDATA(shpnt)->debug & debug_datao)
2212               printk("sending data (left: bytes=%d, buffers=%d), waiting, ",
2213                      CURRENT_SC->SCp.this_residual,
2214                      CURRENT_SC->SCp.buffers_residual);
2215 #endif
2216             /* transfer rest of buffer, but max. 128 byte */
2217             data_count =
2218               CURRENT_SC->SCp.this_residual > 128 ?
2219               128 : CURRENT_SC->SCp.this_residual ;
2220 
2221 #if defined(DEBUG_DATAO)
2222             if(HOSTDATA(shpnt)->debug & debug_datao)
2223               printk("data_count=%d, ", data_count);
2224 #endif
2225   
2226             if(data_count&1)
2227               {
2228                 /* put a single byte in byte mode */
2229                 SETBITS(DMACNTRL0, _8BIT);
2230                 SETPORT(DATAPORT, *CURRENT_SC->SCp.ptr++);
2231                 CURRENT_SC->SCp.this_residual--;
2232               }
2233             if(data_count>1)
2234               {
2235                 CLRBITS(DMACNTRL0, _8BIT);
2236                 data_count >>= 1; /* number of words */
2237                 outsw(DATAPORT, CURRENT_SC->SCp.ptr, data_count);
2238                 CURRENT_SC->SCp.ptr           += 2 * data_count;
2239                 CURRENT_SC->SCp.this_residual -= 2 * data_count;
2240               }
2241 
2242             /* wait for FIFO to get empty */
2243             while(TESTLO(DMASTAT, DFIFOEMP|INTSTAT))
2244               barrier();
2245 
2246 #if defined(DEBUG_DATAO)
2247             if(HOSTDATA(shpnt)->debug & debug_datao)
2248               printk("fifo (%d bytes), transfered (%d bytes), ",
2249                      GETPORT(FIFOSTAT), GETSTCNT());
2250 #endif
2251 
2252             /* if this buffer is empty and there are more buffers left */
2253             if (TESTLO(SSTAT1, PHASEMIS) &&
2254                 !CURRENT_SC->SCp.this_residual &&
2255                 CURRENT_SC->SCp.buffers_residual)
2256               {
2257                  /* advance to next buffer */
2258                 CURRENT_SC->SCp.buffers_residual--;
2259                 CURRENT_SC->SCp.buffer++;
2260                 CURRENT_SC->SCp.ptr =
2261                   CURRENT_SC->SCp.buffer->address;
2262                 CURRENT_SC->SCp.this_residual =
2263                   CURRENT_SC->SCp.buffer->length;
2264               }
2265           }
2266 
2267         if (CURRENT_SC->SCp.this_residual || CURRENT_SC->SCp.buffers_residual)
2268           {
2269             /* target leaves DATA OUT for an other phase
2270                (perhaps disconnect) */
2271 
2272             /* data in fifos has to be resend */
2273             data_count = GETPORT(SSTAT2) & (SFULL|SFCNT);
2274 
2275             data_count += GETPORT(FIFOSTAT) ;
2276             CURRENT_SC->SCp.ptr           -= data_count;
2277             CURRENT_SC->SCp.this_residual += data_count;
2278 #if defined(DEBUG_DATAO)
2279             if(HOSTDATA(shpnt)->debug & debug_datao)
2280               printk("left data (bytes=%d, buffers=%d), fifos (bytes=%d), "
2281                      "transfer incomplete, resetting fifo, ",
2282                      CURRENT_SC->SCp.this_residual,
2283                      CURRENT_SC->SCp.buffers_residual,
2284                      data_count);
2285 #endif
2286             SETPORT(DMACNTRL0, WRITE_READ|RSTFIFO);
2287             CLRBITS(SXFRCTL0, SCSIEN|DMAEN);
2288             CLRBITS(DMACNTRL0, ENDMA);
2289           }
2290         else
2291           {
2292 #if defined(DEBUG_DATAO)
2293             if(HOSTDATA(shpnt)->debug & debug_datao)
2294               printk("waiting for SCSI fifo to get empty, ");
2295 #endif
2296             /* wait for SCSI fifo to get empty */
2297             while(TESTLO(SSTAT2, SEMPTY))
2298               barrier();
2299 #if defined(DEBUG_DATAO)
2300             if(HOSTDATA(shpnt)->debug & debug_datao)
2301               printk("ok, left data (bytes=%d, buffers=%d) ",
2302                      CURRENT_SC->SCp.this_residual,
2303                      CURRENT_SC->SCp.buffers_residual);
2304 #endif
2305             CLRBITS(SXFRCTL0, SCSIEN|DMAEN);
2306 
2307             /* transfer can be considered ended, when SCSIEN reads back zero */
2308             while(TESTHI(SXFRCTL0, SCSIEN))
2309               barrier();
2310 
2311             CLRBITS(DMACNTRL0, ENDMA);
2312           }
2313 
2314 #if defined(DEBUG_DATAO) || defined(DEBUG_INTR)
2315         if(HOSTDATA(shpnt)->debug & (debug_datao|debug_intr))
2316           printk("sent %d data bytes, ", GETSTCNT());
2317 #endif
2318       }
2319       break;
2320 
2321     case P_BUSFREE:                                                /* BUSFREE */
2322 #if defined(DEBUG_RACE)
2323       leave_driver("(BUSFREE) intr");
2324 #endif
2325 #if defined(DEBUG_PHASES)
2326       if(HOSTDATA(shpnt)->debug & debug_phases)
2327         printk("unexpected BUS FREE, ");
2328 #endif
2329       CURRENT_SC->SCp.phase &= ~(P_MASK<<16);
2330 
2331       aha152x_done(shpnt, DID_ERROR << 16);         /* Don't know any better */
2332       return;
2333       break;
2334 
2335     case P_PARITY:                              /* parity error in DATA phase */
2336 #if defined(DEBUG_RACE)
2337       leave_driver("(DID_PARITY) intr");
2338 #endif
2339       printk("PARITY error in DATA phase, ");
2340 
2341       CURRENT_SC->SCp.phase &= ~(P_MASK<<16);
2342 
2343       SETBITS(DMACNTRL0, INTEN);
2344       aha152x_done(shpnt, DID_PARITY << 16);
2345       return;
2346       break;
2347 
2348     default:
2349       printk("aha152x: unexpected phase\n");
2350       break;
2351     }
2352 
2353   if(done)
2354     {
2355 #if defined(DEBUG_INTR)
2356       if(HOSTDATA(shpnt)->debug & debug_intr)
2357         printk("command done.\n");
2358 #endif
2359 #if defined(DEBUG_RACE)
2360       leave_driver("(done) intr");
2361 #endif
2362 
2363       SETPORT(SIMODE0, DISCONNECTED_SC ? ENSELDI : 0);
2364       SETPORT(SIMODE1, ISSUE_SC ? ENBUSFREE : 0);
2365       SETPORT(SCSISEQ, DISCONNECTED_SC ? ENRESELI : 0);
2366       
2367       SETBITS(DMACNTRL0, INTEN);
2368       
2369       aha152x_done(shpnt,
2370                    (CURRENT_SC->SCp.Status  & 0xff)
2371                    | ((CURRENT_SC->SCp.Message & 0xff) << 8)
2372                    | (DID_OK << 16));
2373 
2374 #if defined(DEBUG_RACE)
2375       printk("done returned (DID_OK: Status=%x; Message=%x).\n",
2376              CURRENT_SC->SCp.Status, CURRENT_SC->SCp.Message);
2377 #endif
2378       return;
2379     }
2380 
2381   if(CURRENT_SC)
2382     CURRENT_SC->SCp.phase |= 1<<16 ;
2383 
2384   SETPORT(SIMODE0, 0);
2385   SETPORT(SIMODE1, ENPHASEMIS|ENBUSFREE);
2386 #if defined(DEBUG_INTR)
2387   if(HOSTDATA(shpnt)->debug & debug_intr)
2388     disp_enintr(shpnt);
2389 #endif
2390 #if defined(DEBUG_RACE)
2391   leave_driver("(PHASEEND) intr");
2392 #endif
2393 
2394   SETBITS(DMACNTRL0, INTEN);
2395   return;
2396 }
2397 
2398 /* 
2399  * Dump the current driver status and panic...
2400  */
2401 static void aha152x_panic(struct Scsi_Host *shpnt, char *msg)
     /*  */
2402 {
2403   printk("\naha152x: %s\n", msg);
2404   show_queues(shpnt);
2405   panic("aha152x panic");
2406 }
2407 
2408 /*
2409  * Display registers of AIC-6260
2410  */
2411 static void disp_ports(struct Scsi_Host *shpnt)
     /*  */
2412 {
2413 #ifdef DEBUG_AHA152X
2414   int s;
2415 
2416 #ifdef SKIP_PORTS
2417   if(HOSTDATA(shpnt)->debug & debug_skipports)
2418         return;
2419 #endif
2420 
2421   printk("\n%s: ", CURRENT_SC ? "on bus" : "waiting");
2422 
2423   s=GETPORT(SCSISEQ);
2424   printk("SCSISEQ (");
2425   if(s & TEMODEO)     printk("TARGET MODE ");
2426   if(s & ENSELO)      printk("SELO ");
2427   if(s & ENSELI)      printk("SELI ");
2428   if(s & ENRESELI)    printk("RESELI ");
2429   if(s & ENAUTOATNO)  printk("AUTOATNO ");
2430   if(s & ENAUTOATNI)  printk("AUTOATNI ");
2431   if(s & ENAUTOATNP)  printk("AUTOATNP ");
2432   if(s & SCSIRSTO)    printk("SCSIRSTO ");
2433   printk(");");
2434 
2435   printk(" SCSISIG (");
2436   s=GETPORT(SCSISIG);
2437   switch(s & P_MASK)
2438     {
2439     case P_DATAO:
2440       printk("DATA OUT");
2441       break;
2442     case P_DATAI:
2443       printk("DATA IN");
2444       break;
2445     case P_CMD:
2446       printk("COMMAND"); 
2447       break;
2448     case P_STATUS:
2449       printk("STATUS"); 
2450       break;
2451     case P_MSGO:
2452       printk("MESSAGE OUT");
2453       break;
2454     case P_MSGI:
2455       printk("MESSAGE IN");
2456       break;
2457     default:
2458       printk("*illegal*");
2459       break;
2460     }
2461   
2462   printk("); ");
2463 
2464   printk("INTSTAT (%s); ", TESTHI(DMASTAT, INTSTAT) ? "hi" : "lo");
2465 
2466   printk("SSTAT (");
2467   s=GETPORT(SSTAT0);
2468   if(s & TARGET)   printk("TARGET ");
2469   if(s & SELDO)    printk("SELDO ");
2470   if(s & SELDI)    printk("SELDI ");
2471   if(s & SELINGO)  printk("SELINGO ");
2472   if(s & SWRAP)    printk("SWRAP ");
2473   if(s & SDONE)    printk("SDONE ");
2474   if(s & SPIORDY)  printk("SPIORDY ");
2475   if(s & DMADONE)  printk("DMADONE ");
2476 
2477   s=GETPORT(SSTAT1);
2478   if(s & SELTO)     printk("SELTO ");
2479   if(s & ATNTARG)   printk("ATNTARG ");
2480   if(s & SCSIRSTI)  printk("SCSIRSTI ");
2481   if(s & PHASEMIS)  printk("PHASEMIS ");
2482   if(s & BUSFREE)   printk("BUSFREE ");
2483   if(s & SCSIPERR)  printk("SCSIPERR ");
2484   if(s & PHASECHG)  printk("PHASECHG ");
2485   if(s & REQINIT)   printk("REQINIT ");
2486   printk("); ");
2487 
2488 
2489   printk("SSTAT (");
2490 
2491   s=GETPORT(SSTAT0) & GETPORT(SIMODE0);
2492 
2493   if(s & TARGET)    printk("TARGET ");
2494   if(s & SELDO)     printk("SELDO ");
2495   if(s & SELDI)     printk("SELDI ");
2496   if(s & SELINGO)   printk("SELINGO ");
2497   if(s & SWRAP)     printk("SWRAP ");
2498   if(s & SDONE)     printk("SDONE ");
2499   if(s & SPIORDY)   printk("SPIORDY ");
2500   if(s & DMADONE)   printk("DMADONE ");
2501 
2502   s=GETPORT(SSTAT1) & GETPORT(SIMODE1);
2503 
2504   if(s & SELTO)     printk("SELTO ");
2505   if(s & ATNTARG)   printk("ATNTARG ");
2506   if(s & SCSIRSTI)  printk("SCSIRSTI ");
2507   if(s & PHASEMIS)  printk("PHASEMIS ");
2508   if(s & BUSFREE)   printk("BUSFREE ");
2509   if(s & SCSIPERR)  printk("SCSIPERR ");
2510   if(s & PHASECHG)  printk("PHASECHG ");
2511   if(s & REQINIT)   printk("REQINIT ");
2512   printk("); ");
2513 
2514   printk("SXFRCTL0 (");
2515 
2516   s=GETPORT(SXFRCTL0);
2517   if(s & SCSIEN)    printk("SCSIEN ");
2518   if(s & DMAEN)     printk("DMAEN ");
2519   if(s & CH1)       printk("CH1 ");
2520   if(s & CLRSTCNT)  printk("CLRSTCNT ");
2521   if(s & SPIOEN)    printk("SPIOEN ");
2522   if(s & CLRCH1)    printk("CLRCH1 ");
2523   printk("); ");
2524 
2525   printk("SIGNAL (");
2526 
2527   s=GETPORT(SCSISIG);
2528   if(s & ATNI)  printk("ATNI ");
2529   if(s & SELI)  printk("SELI ");
2530   if(s & BSYI)  printk("BSYI ");
2531   if(s & REQI)  printk("REQI ");
2532   if(s & ACKI)  printk("ACKI ");
2533   printk("); ");
2534 
2535   printk("SELID (%02x), ", GETPORT(SELID));
2536 
2537   printk("SSTAT2 (");
2538 
2539   s=GETPORT(SSTAT2);
2540   if(s & SOFFSET)  printk("SOFFSET ");
2541   if(s & SEMPTY)   printk("SEMPTY ");
2542   if(s & SFULL)    printk("SFULL ");
2543   printk("); SFCNT (%d); ", s & (SFULL|SFCNT));
2544 
2545   s=GETPORT(SSTAT3);
2546   printk("SCSICNT (%d), OFFCNT(%d), ", (s&0xf0)>>4, s&0x0f);
2547   
2548   printk("SSTAT4 (");
2549   s=GETPORT(SSTAT4);
2550   if(s & SYNCERR)   printk("SYNCERR ");
2551   if(s & FWERR)     printk("FWERR ");
2552   if(s & FRERR)     printk("FRERR ");
2553   printk("); ");
2554 
2555   printk("DMACNTRL0 (");
2556   s=GETPORT(DMACNTRL0);
2557   printk("%s ", s & _8BIT      ? "8BIT"  : "16BIT");
2558   printk("%s ", s & DMA        ? "DMA"   : "PIO"  );
2559   printk("%s ", s & WRITE_READ ? "WRITE" : "READ" );
2560   if(s & ENDMA)    printk("ENDMA ");
2561   if(s & INTEN)    printk("INTEN ");
2562   if(s & RSTFIFO)  printk("RSTFIFO ");
2563   if(s & SWINT)    printk("SWINT ");
2564   printk("); ");
2565 
2566 
2567 #if 0
2568   printk("DMACNTRL1 (");
2569 
2570   s=GETPORT(DMACNTRL1);
2571   if(s & PWRDWN)    printk("PWRDN ");
2572   printk("); ");
2573 
2574 
2575   printk("STK (%d); ", s & 0xf);
2576   
2577 #endif
2578 
2579   printk("DMASTAT (");
2580   s=GETPORT(DMASTAT);
2581   if(s & ATDONE)     printk("ATDONE ");
2582   if(s & WORDRDY)    printk("WORDRDY ");
2583   if(s & DFIFOFULL)  printk("DFIFOFULL ");
2584   if(s & DFIFOEMP)   printk("DFIFOEMP ");
2585   printk(")");
2586 
2587   printk("\n");
2588 #endif
2589 }
2590 
2591 /*
2592  * display enabled interrupts
2593  */
2594 static void disp_enintr(struct Scsi_Host *shpnt)
     /*  */
2595 {
2596   int s;
2597 
2598   printk("enabled interrupts (");
2599   
2600   s=GETPORT(SIMODE0);
2601   if(s & ENSELDO)    printk("ENSELDO ");
2602   if(s & ENSELDI)    printk("ENSELDI ");
2603   if(s & ENSELINGO)  printk("ENSELINGO ");
2604   if(s & ENSWRAP)    printk("ENSWRAP ");
2605   if(s & ENSDONE)    printk("ENSDONE ");
2606   if(s & ENSPIORDY)  printk("ENSPIORDY ");
2607   if(s & ENDMADONE)  printk("ENDMADONE ");
2608 
2609   s=GETPORT(SIMODE1);
2610   if(s & ENSELTIMO)    printk("ENSELTIMO ");
2611   if(s & ENATNTARG)    printk("ENATNTARG ");
2612   if(s & ENPHASEMIS)   printk("ENPHASEMIS ");
2613   if(s & ENBUSFREE)    printk("ENBUSFREE ");
2614   if(s & ENSCSIPERR)   printk("ENSCSIPERR ");
2615   if(s & ENPHASECHG)   printk("ENPHASECHG ");
2616   if(s & ENREQINIT)    printk("ENREQINIT ");
2617   printk(")\n");
2618 }
2619 
2620 #if defined(DEBUG_RACE)
2621 
2622 static const char *should_leave;
2623 static int in_driver=0;
2624 
2625 /*
2626  * Only one routine can be in the driver at once.
2627  */
2628 static void enter_driver(const char *func)
     /*  */
2629 {
2630   unsigned long flags;
2631 
2632   save_flags(flags);
2633   cli();
2634   printk("aha152x: entering %s() (%x)\n", func, jiffies);
2635   if(in_driver)
2636     {
2637       printk("%s should leave first.\n", should_leave);
2638       panic("aha152x: already in driver\n");
2639     }
2640 
2641   in_driver++;
2642   should_leave=func;
2643   restore_flags(flags);
2644 }
2645 
2646 static void leave_driver(const char *func)
     /*  */
2647 {
2648   unsigned long flags;
2649 
2650   save_flags(flags);
2651   cli();
2652   printk("\naha152x: leaving %s() (%x)\n", func, jiffies);
2653   if(!in_driver)
2654     {
2655       printk("aha152x: %s already left.\n", should_leave);
2656       panic("aha152x: %s already left driver.\n");
2657     }
2658 
2659   in_driver--;
2660   should_leave=func;
2661   restore_flags(flags);
2662 }
2663 #endif
2664 
2665 /*
2666  * Show the command data of a command
2667  */
2668 static void show_command(Scsi_Cmnd *ptr)
     /*  */
2669 {
2670   printk("0x%08x: target=%d; lun=%d; cmnd=(",
2671          (unsigned int) ptr, ptr->target, ptr->lun);
2672   
2673   print_command(ptr->cmnd);
2674 
2675   printk("); residual=%d; buffers=%d; phase |",
2676          ptr->SCp.this_residual, ptr->SCp.buffers_residual);
2677 
2678   if(ptr->SCp.phase & not_issued  )  printk("not issued|");
2679   if(ptr->SCp.phase & in_selection)  printk("in selection|");
2680   if(ptr->SCp.phase & disconnected)  printk("disconnected|");
2681   if(ptr->SCp.phase & aborted     )  printk("aborted|");
2682   if(ptr->SCp.phase & sent_ident  )  printk("send_ident|");
2683   if(ptr->SCp.phase & in_other)
2684     { 
2685       printk("; in other(");
2686       switch((ptr->SCp.phase >> 16) & P_MASK)
2687         {
2688         case P_DATAO:
2689           printk("DATA OUT");
2690           break;
2691         case P_DATAI:
2692           printk("DATA IN");
2693           break;
2694         case P_CMD:
2695           printk("COMMAND");
2696           break;
2697         case P_STATUS:
2698           printk("STATUS");
2699           break;
2700         case P_MSGO:
2701           printk("MESSAGE OUT");
2702           break;
2703         case P_MSGI:
2704           printk("MESSAGE IN");
2705           break;
2706         default: 
2707           printk("*illegal*");
2708           break;
2709         }
2710       printk(")");
2711       if(ptr->SCp.phase & (1<<16))
2712         printk("; phaseend");
2713     }
2714   printk("; next=0x%08x\n", (unsigned int) ptr->host_scribble);
2715 }
2716  
2717 /*
2718  * Dump the queued data
2719  */
2720 static void show_queues(struct Scsi_Host *shpnt)
     /*  */
2721 {
2722   unsigned long flags;
2723   Scsi_Cmnd *ptr;
2724 
2725   save_flags(flags);
2726   cli();
2727   printk("QUEUE STATUS:\nissue_SC:\n");
2728   for(ptr=ISSUE_SC; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
2729     show_command(ptr);
2730 
2731   printk("current_SC:\n");
2732   if(CURRENT_SC)
2733     show_command(CURRENT_SC);
2734   else
2735     printk("none\n");
2736 
2737   printk("disconnected_SC:\n");
2738   for(ptr=DISCONNECTED_SC; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
2739     show_command(ptr);
2740 
2741   disp_ports(shpnt);
2742   disp_enintr(shpnt);
2743   restore_flags(flags);
2744 }
2745 
2746 int aha152x_set_info(char *buffer, int length, struct Scsi_Host *shpnt)
     /*  */
2747 {
2748   return(-ENOSYS);  /* Currently this is a no-op */
2749 }
2750 
2751 #undef SPRINTF
2752 #define SPRINTF(args...) pos += sprintf(pos, ## args)
2753 
2754 static int get_command(char *pos, Scsi_Cmnd *ptr)
     /*  */
2755 {
2756   char *start = pos;
2757   int i;
2758   
2759   SPRINTF("0x%08x: target=%d; lun=%d; cmnd=(",
2760           (unsigned int) ptr, ptr->target, ptr->lun);
2761   
2762   for(i=0; i<COMMAND_SIZE(ptr->cmnd[0]); i++)
2763     SPRINTF("0x%02x", ptr->cmnd[i]);
2764   
2765   SPRINTF("); residual=%d; buffers=%d; phase |",
2766           ptr->SCp.this_residual, ptr->SCp.buffers_residual);
2767   
2768   if(ptr->SCp.phase & not_issued  )  SPRINTF("not issued|");
2769   if(ptr->SCp.phase & in_selection)  SPRINTF("in selection|");
2770   if(ptr->SCp.phase & disconnected)  SPRINTF("disconnected|");
2771   if(ptr->SCp.phase & aborted     )  SPRINTF("aborted|");
2772   if(ptr->SCp.phase & sent_ident  )  SPRINTF("send_ident|");
2773   if(ptr->SCp.phase & in_other)
2774     { 
2775       SPRINTF("; in other(");
2776       switch((ptr->SCp.phase >> 16) & P_MASK)
2777         {
2778         case P_DATAO:
2779           SPRINTF("DATA OUT");
2780           break;
2781         case P_DATAI:
2782           SPRINTF("DATA IN");
2783           break;
2784         case P_CMD:
2785           SPRINTF("COMMAND");
2786           break;
2787         case P_STATUS:
2788           SPRINTF("STATUS");
2789           break;
2790         case P_MSGO:
2791           SPRINTF("MESSAGE OUT");
2792           break;
2793         case P_MSGI:
2794           SPRINTF("MESSAGE IN");
2795           break;
2796         default: 
2797           SPRINTF("*illegal*");
2798           break;
2799         }
2800       SPRINTF(")");
2801       if(ptr->SCp.phase & (1<<16))
2802         SPRINTF("; phaseend");
2803     }
2804   SPRINTF("; next=0x%08x\n", (unsigned int) ptr->host_scribble);
2805   
2806   return(pos-start);
2807 }
2808 
2809 #undef SPRINTF
2810 #define SPRINTF(args...) do { if(pos < buffer + length) pos += sprintf(pos, ## args); } while(0)
2811 
2812 int aha152x_proc_info(
     /*  */
2813                       char *buffer,
2814                       char **start,
2815                       off_t offset,
2816                       int length,
2817                       int hostno,
2818                       int inout
2819                       )
2820 {
2821   int i;
2822   char *pos = buffer;
2823   Scsi_Device *scd;
2824   struct Scsi_Host *shpnt;
2825   unsigned long flags;
2826   Scsi_Cmnd *ptr;
2827   
2828   for(i=0, shpnt= (struct Scsi_Host *) NULL; i<IRQS; i++)
2829     if(aha152x_host[i] && aha152x_host[i]->host_no == hostno)
2830       shpnt=aha152x_host[i];
2831   
2832   if(!shpnt)
2833     return(-ESRCH);
2834   
2835   if(inout) /* Has data been written to the file ? */ 
2836     return(aha152x_set_info(buffer, length, shpnt));
2837   
2838   SPRINTF(AHA152X_REVID "\n");
2839   
2840   save_flags(flags);
2841   cli();
2842   
2843   SPRINTF("vital data:\nioports 0x%04x to 0x%04x\n",
2844           shpnt->io_port, shpnt->io_port+shpnt->n_io_port-1);
2845   SPRINTF("interrupt 0x%02x\n", shpnt->irq);
2846   SPRINTF("disconnection/reconnection %s\n", 
2847           HOSTDATA(shpnt)->reconnect ? "enabled" : "disabled");
2848   SPRINTF("parity checking %s\n", 
2849           HOSTDATA(shpnt)->parity ? "enabled" : "disabled");
2850   SPRINTF("synchronous transfers %s\n", 
2851           HOSTDATA(shpnt)->synchronous ? "enabled" : "disabled");
2852   SPRINTF("current queued %d commands\n",
2853           HOSTDATA(shpnt)->commands);
2854   
2855 #if 0
2856   SPRINTF("synchronously operating targets (tick=%ld ns):\n",
2857           250000000/loops_per_sec);
2858   for(i=0; i<8; i++)
2859     if(HOSTDATA(shpnt)->syncrate[i]&0x7f)
2860       SPRINTF("target %d: period %dT/%ldns; req/ack offset %d\n",
2861               i,
2862               (((HOSTDATA(shpnt)->syncrate[i]&0x70)>>4)+2),
2863                        (((HOSTDATA(shpnt)->syncrate[i]&0x70)>>4)+2)*
2864                          250000000/loops_per_sec,
2865                        HOSTDATA(shpnt)->syncrate[i]&0x0f);
2866 #else
2867   SPRINTF("synchronously operating targets (tick=50 ns):\n");
2868   for(i=0; i<8; i++)
2869     if(HOSTDATA(shpnt)->syncrate[i]&0x7f)
2870       SPRINTF("target %d: period %dT/%dns; req/ack offset %d\n",
2871               i,
2872               (((HOSTDATA(shpnt)->syncrate[i]&0x70)>>4)+2),
2873               (((HOSTDATA(shpnt)->syncrate[i]&0x70)>>4)+2)*50,
2874               HOSTDATA(shpnt)->syncrate[i]&0x0f);
2875 #endif
2876   
2877 #ifdef DEBUG_AHA152X
2878 #define PDEBUG(flags,txt) if(HOSTDATA(shpnt)->debug & flags) SPRINTF("(%s) ", txt);
2879   
2880   SPRINTF("enabled debugging options:\n");
2881   
2882   PDEBUG(debug_skipports, "skip ports");
2883   PDEBUG(debug_queue, "queue");
2884   PDEBUG(debug_intr, "interrupt");
2885   PDEBUG(debug_selection, "selection");
2886   PDEBUG(debug_msgo, "message out");
2887   PDEBUG(debug_msgi, "message in");
2888   PDEBUG(debug_status, "status");
2889   PDEBUG(debug_cmd, "command");
2890   PDEBUG(debug_datai, "data in");
2891   PDEBUG(debug_datao, "data out");
2892   PDEBUG(debug_abort, "abort");
2893   PDEBUG(debug_done, "done");
2894   PDEBUG(debug_biosparam, "bios parameters");
2895   PDEBUG(debug_phases, "phases");
2896   PDEBUG(debug_queues, "queues");
2897   PDEBUG(debug_reset, "reset");
2898   
2899   SPRINTF("\n");
2900 #endif
2901   
2902   SPRINTF("queue status:\nnot yet issued commands:\n");
2903   for(ptr=ISSUE_SC; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
2904     pos += get_command(pos, ptr);
2905   
2906   if(CURRENT_SC)
2907     {
2908       SPRINTF("current command:\n");
2909       pos += get_command(pos, CURRENT_SC);
2910     }
2911   
2912   SPRINTF("disconnected commands:\n");
2913   for(ptr=DISCONNECTED_SC; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
2914     pos += get_command(pos, ptr);
2915   
2916   restore_flags(flags);
2917   
2918   scd = scsi_devices;
2919   
2920   SPRINTF("Attached devices: %s\n", (scd)?"":"none");
2921   
2922   while (scd) {
2923     if (scd->host == shpnt) {
2924       
2925       SPRINTF("Channel: %02d Id: %02d Lun: %02d\n  Vendor: ",
2926               scd->channel, scd->id, scd->lun);
2927       for (i=0; i<8; i++) {
2928         if (scd->vendor[i] >= 0x20)
2929           SPRINTF("%c", scd->vendor[i]);
2930         else
2931           SPRINTF(" ");
2932       }
2933       SPRINTF(" Model: ");
2934       for (i = 0; i < 16; i++) {
2935         if (scd->model[i] >= 0x20)
2936           SPRINTF("%c", scd->model[i]);
2937         else
2938           SPRINTF(" ");
2939       }
2940       SPRINTF(" Rev: ");
2941       for (i = 0; i < 4; i++) {
2942         if (scd->rev[i] >= 0x20)
2943           SPRINTF("%c", scd->rev[i]);
2944         else
2945           SPRINTF(" ");
2946       }
2947       SPRINTF("\n");
2948       
2949       SPRINTF("  Type:   %d ", scd->type);
2950       SPRINTF("               ANSI SCSI revision: %02x",
2951               (scd->scsi_level < 3)?1:2);
2952       
2953       if (scd->scsi_level == 2)
2954         SPRINTF(" CCS\n");
2955       else
2956         SPRINTF("\n");
2957     }
2958     scd = scd->next;
2959   }
2960   
2961   *start=buffer+offset;
2962   if (pos - buffer < offset)
2963     return 0;
2964   else if (pos - buffer - offset < length)
2965     return pos - buffer - offset;
2966   else
2967     return length;
2968 }
2969 
2970 #ifdef MODULE
2971 /* Eventually this will go into an include file, but this will be later */
2972 Scsi_Host_Template driver_template = AHA152X;
2973 
2974 #include "scsi_module.c"
2975 #endif
/* */
root/drivers/scsi/aha152x.c

DEFINITIONS
