drivers/scsi/aha1740.c

   1 /*  $Id$
   2  *  1993/03/31
   3  *  linux/kernel/aha1740.c
   4  *
   5  *  Based loosely on aha1542.c which is
   6  *  Copyright (C) 1992  Tommy Thorn and
   7  *  Modified by Eric Youngdale
   8  *
   9  *  This file is aha1740.c, written and
  10  *  Copyright (C) 1992,1993  Brad McLean
  11  *  brad@saturn.gaylord.com or brad@bradpc.gaylord.com.
  12  *
  13  *  Modifications to makecode and queuecommand
  14  *  for proper handling of multiple devices courteously
  15  *  provided by Michael Weller, March, 1993
  16  *
  17  *  Multiple adapter support, extended translation detection,
  18  *  update to current scsi subsystem changes, proc fs support,
  19  *  working (!) module support based on patches from Andreas Arens,
  20  *  by Andreas Degert <ad@papyrus.hamburg.com>, 2/1997
  21  *
  22  * aha1740_makecode may still need even more work
  23  * if it doesn't work for your devices, take a look.
  24  *
  25  * Reworked for new_eh and new locking by Alan Cox <alan@lxorguk.ukuu.org.uk>
  26  *
  27  * Converted to EISA and generic DMA APIs by Marc Zyngier
  28  * <maz@wild-wind.fr.eu.org>, 4/2003.
  29  *
  30  * Shared interrupt support added by Rask Ingemann Lambertsen
  31  * <rask@sygehus.dk>, 10/2003
  32  *
  33  * For the avoidance of doubt the "preferred form" of this code is one which
  34  * is in an open non patent encumbered format. Where cryptographic key signing
  35  * forms part of the process of creating an executable the information
  36  * including keys needed to generate an equivalently functional executable
  37  * are deemed to be part of the source code.
  38  */
  39
  40 #include <linux/blkdev.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/module.h>
  43 #include <linux/kernel.h>
  44 #include <linux/types.h>
  45 #include <linux/string.h>
  46 #include <linux/ioport.h>
  47 #include <linux/proc_fs.h>
  48 #include <linux/stat.h>
  49 #include <linux/init.h>
  50 #include <linux/device.h>
  51 #include <linux/eisa.h>
  52 #include <linux/dma-mapping.h>
  53 #include <linux/gfp.h>
  54
  55 #include <asm/dma.h>
  56 #include <asm/io.h>
  57
  58 #include <scsi/scsi.h>
  59 #include <scsi/scsi_cmnd.h>
  60 #include <scsi/scsi_device.h>
  61 #include <scsi/scsi_eh.h>
  62 #include <scsi/scsi_host.h>
  63 #include <scsi/scsi_tcq.h>
  64 #include "aha1740.h"
  65
  66 /* IF YOU ARE HAVING PROBLEMS WITH THIS DRIVER, AND WANT TO WATCH
  67    IT WORK, THEN:
  68 #define DEBUG
  69 */
  70 #ifdef DEBUG
  71 #define DEB(x) x
  72 #else
  73 #define DEB(x)
  74 #endif
  75
  76 struct aha1740_hostdata {
  77         struct eisa_device *edev;
  78         unsigned int translation;
  79         unsigned int last_ecb_used;
  80         dma_addr_t ecb_dma_addr;
  81         struct ecb ecb[AHA1740_ECBS];
  82 };
  83
  84 struct aha1740_sg {
  85         struct aha1740_chain sg_chain[AHA1740_SCATTER];
  86         dma_addr_t sg_dma_addr;
  87         dma_addr_t buf_dma_addr;
  88 };
  89
  90 #define HOSTDATA(host) ((struct aha1740_hostdata *) &host->hostdata)
  91
  92 static inline struct ecb *ecb_dma_to_cpu (struct Scsi_Host *host,
  93                                           dma_addr_t dma)
  94 {
  95         struct aha1740_hostdata *hdata = HOSTDATA (host);
  96         dma_addr_t offset;
  97
  98         offset = dma - hdata->ecb_dma_addr;
  99
 100         return (struct ecb *)(((char *) hdata->ecb) + (unsigned int) offset);
 101 }
 102
 103 static inline dma_addr_t ecb_cpu_to_dma (struct Scsi_Host *host, void *cpu)
 104 {
 105         struct aha1740_hostdata *hdata = HOSTDATA (host);
 106         dma_addr_t offset;
 107
 108         offset = (char *) cpu - (char *) hdata->ecb;
 109
 110         return hdata->ecb_dma_addr + offset;
 111 }
 112
 113 static int aha1740_show_info(struct seq_file *m, struct Scsi_Host *shpnt)
 114 {
 115         struct aha1740_hostdata *host = HOSTDATA(shpnt);
 116         seq_printf(m, "aha174x at IO:%lx, IRQ %d, SLOT %d.\n"
 117                       "Extended translation %sabled.\n",
 118                       shpnt->io_port, shpnt->irq, host->edev->slot,
 119                       host->translation ? "en" : "dis");
 120         return 0;
 121 }
 122
 123 static int aha1740_makecode(unchar *sense, unchar *status)
 124 {
 125         struct statusword
 126         {
 127                 ushort  don:1,  /* Command Done - No Error */
 128                         du:1,   /* Data underrun */
 129                     :1, qf:1,   /* Queue full */
 130                         sc:1,   /* Specification Check */
 131                         dor:1,  /* Data overrun */
 132                         ch:1,   /* Chaining Halted */
 133                         intr:1, /* Interrupt issued */
 134                         asa:1,  /* Additional Status Available */
 135                         sns:1,  /* Sense information Stored */
 136                     :1, ini:1,  /* Initialization Required */
 137                         me:1,   /* Major error or exception */
 138                     :1, eca:1,  /* Extended Contingent alliance */
 139                     :1;
 140         } status_word;
 141         int retval = DID_OK;
 142
 143         status_word = * (struct statusword *) status;
 144 #ifdef DEBUG
 145         printk("makecode from %x,%x,%x,%x %x,%x,%x,%x",
 146                status[0], status[1], status[2], status[3],
 147                sense[0], sense[1], sense[2], sense[3]);
 148 #endif
 149         if (!status_word.don) { /* Anything abnormal was detected */
 150                 if ( (status[1]&0x18) || status_word.sc ) {
 151                         /*Additional info available*/
 152                         /* Use the supplied info for further diagnostics */
 153                         switch ( status[2] ) {
 154                         case 0x12:
 155                                 if ( status_word.dor )
 156                                         retval=DID_ERROR; /* It's an Overrun */
 157                                 /* If not overrun, assume underrun and
 158                                  * ignore it! */
 159                                 break;
 160                         case 0x00: /* No info, assume no error, should
 161                                     * not occur */
 162                                 break;
 163                         case 0x11:
 164                         case 0x21:
 165                                 retval=DID_TIME_OUT;
 166                                 break;
 167                         case 0x0a:
 168                                 retval=DID_BAD_TARGET;
 169                                 break;
 170                         case 0x04:
 171                         case 0x05:
 172                                 retval=DID_ABORT;
 173                                 /* Either by this driver or the
 174                                  * AHA1740 itself */
 175                                 break;
 176                         default:
 177                                 retval=DID_ERROR; /* No further
 178                                                    * diagnostics
 179                                                    * possible */
 180                         }
 181                 } else {
 182                         /* Michael suggests, and Brad concurs: */
 183                         if ( status_word.qf ) {
 184                                 retval = DID_TIME_OUT; /* forces a redo */
 185                                 /* I think this specific one should
 186                                  * not happen -Brad */
 187                                 printk("aha1740.c: WARNING: AHA1740 queue overflow!\n");
 188                         } else
 189                                 if ( status[0]&0x60 ) {
 190                                          /* Didn't find a better error */
 191                                         retval = DID_ERROR;
 192                                 }
 193                         /* In any other case return DID_OK so for example
 194                            CONDITION_CHECKS make it through to the appropriate
 195                            device driver */
 196                 }
 197         }
 198         /* Under all circumstances supply the target status -Michael */
 199         return status[3] | retval << 16;
 200 }
 201
 202 static int aha1740_test_port(unsigned int base)
 203 {
 204         if ( inb(PORTADR(base)) & PORTADDR_ENH )
 205                 return 1;   /* Okay, we're all set */
 206
 207         printk("aha174x: Board detected, but not in enhanced mode, so disabled it.\n");
 208         return 0;
 209 }
 210
 211 /* A "high" level interrupt handler */
 212 static irqreturn_t aha1740_intr_handle(int irq, void *dev_id)
 213 {
 214         struct Scsi_Host *host = (struct Scsi_Host *) dev_id;
 215         void (*my_done)(struct scsi_cmnd *);
 216         int errstatus, adapstat;
 217         int number_serviced;
 218         struct ecb *ecbptr;
 219         struct scsi_cmnd *SCtmp;
 220         unsigned int base;
 221         unsigned long flags;
 222         int handled = 0;
 223         struct aha1740_sg *sgptr;
 224         struct eisa_device *edev;
 225
 226         if (!host)
 227                 panic("aha1740.c: Irq from unknown host!\n");
 228         spin_lock_irqsave(host->host_lock, flags);
 229         base = host->io_port;
 230         number_serviced = 0;
 231         edev = HOSTDATA(host)->edev;
 232
 233         while(inb(G2STAT(base)) & G2STAT_INTPEND) {
 234                 handled = 1;
 235                 DEB(printk("aha1740_intr top of loop.\n"));
 236                 adapstat = inb(G2INTST(base));
 237                 ecbptr = ecb_dma_to_cpu (host, inl(MBOXIN0(base)));
 238                 outb(G2CNTRL_IRST,G2CNTRL(base)); /* interrupt reset */
 239
 240                 switch ( adapstat & G2INTST_MASK ) {
 241                 case    G2INTST_CCBRETRY:
 242                 case    G2INTST_CCBERROR:
 243                 case    G2INTST_CCBGOOD:
 244                         /* Host Ready -> Mailbox in complete */
 245                         outb(G2CNTRL_HRDY,G2CNTRL(base));
 246                         if (!ecbptr) {
 247                                 printk("Aha1740 null ecbptr in interrupt (%x,%x,%x,%d)\n",
 248                                        inb(G2STAT(base)),adapstat,
 249                                        inb(G2INTST(base)), number_serviced++);
 250                                 continue;
 251                         }
 252                         SCtmp = ecbptr->SCpnt;
 253                         if (!SCtmp) {
 254                                 printk("Aha1740 null SCtmp in interrupt (%x,%x,%x,%d)\n",
 255                                        inb(G2STAT(base)),adapstat,
 256                                        inb(G2INTST(base)), number_serviced++);
 257                                 continue;
 258                         }
 259                         sgptr = (struct aha1740_sg *) SCtmp->host_scribble;
 260                         scsi_dma_unmap(SCtmp);
 261
 262                         /* Free the sg block */
 263                         dma_free_coherent (&edev->dev,
 264                                            sizeof (struct aha1740_sg),
 265                                            SCtmp->host_scribble,
 266                                            sgptr->sg_dma_addr);
 267
 268                         /* Fetch the sense data, and tuck it away, in
 269                            the required slot.  The Adaptec
 270                            automatically fetches it, and there is no
 271                            guarantee that we will still have it in the
 272                            cdb when we come back */
 273                         if ( (adapstat & G2INTST_MASK) == G2INTST_CCBERROR ) {
 274                                 memcpy_and_pad(SCtmp->sense_buffer,
 275                                                SCSI_SENSE_BUFFERSIZE,
 276                                                ecbptr->sense,
 277                                                sizeof(ecbptr->sense),
 278                                                0);
 279                                 errstatus = aha1740_makecode(ecbptr->sense,ecbptr->status);
 280                         } else
 281                                 errstatus = 0;
 282                         DEB(if (errstatus)
 283                             printk("aha1740_intr_handle: returning %6x\n",
 284                                    errstatus));
 285                         SCtmp->result = errstatus;
 286                         my_done = ecbptr->done;
 287                         memset(ecbptr,0,sizeof(struct ecb));
 288                         if ( my_done )
 289                                 my_done(SCtmp);
 290                         break;
 291
 292                 case    G2INTST_HARDFAIL:
 293                         printk(KERN_ALERT "aha1740 hardware failure!\n");
 294                         panic("aha1740.c");     /* Goodbye */
 295
 296                 case    G2INTST_ASNEVENT:
 297                         printk("aha1740 asynchronous event: %02x %02x %02x %02x %02x\n",
 298                                adapstat,
 299                                inb(MBOXIN0(base)),
 300                                inb(MBOXIN1(base)),
 301                                inb(MBOXIN2(base)),
 302                                inb(MBOXIN3(base))); /* Say What? */
 303                         /* Host Ready -> Mailbox in complete */
 304                         outb(G2CNTRL_HRDY,G2CNTRL(base));
 305                         break;
 306
 307                 case    G2INTST_CMDGOOD:
 308                         /* set immediate command success flag here: */
 309                         break;
 310
 311                 case    G2INTST_CMDERROR:
 312                         /* Set immediate command failure flag here: */
 313                         break;
 314                 }
 315                 number_serviced++;
 316         }
 317
 318         spin_unlock_irqrestore(host->host_lock, flags);
 319         return IRQ_RETVAL(handled);
 320 }
 321
 322 static int aha1740_queuecommand_lck(struct scsi_cmnd *SCpnt)
 323 {
 324         void (*done)(struct scsi_cmnd *) = scsi_done;
 325         unchar direction;
 326         unchar *cmd = (unchar *) SCpnt->cmnd;
 327         unchar target = scmd_id(SCpnt);
 328         struct aha1740_hostdata *host = HOSTDATA(SCpnt->device->host);
 329         unsigned long flags;
 330         dma_addr_t sg_dma;
 331         struct aha1740_sg *sgptr;
 332         int ecbno, nseg;
 333         DEB(int i);
 334
 335         if(*cmd == REQUEST_SENSE) {
 336                 SCpnt->result = 0;
 337                 done(SCpnt);
 338                 return 0;
 339         }
 340
 341 #ifdef DEBUG
 342         if (*cmd == READ_10 || *cmd == WRITE_10)
 343                 i = xscsi2int(cmd+2);
 344         else if (*cmd == READ_6 || *cmd == WRITE_6)
 345                 i = scsi2int(cmd+2);
 346         else
 347                 i = -1;
 348         printk("aha1740_queuecommand: dev %d cmd %02x pos %d len %d ",
 349                target, *cmd, i, bufflen);
 350         printk("scsi cmd:");
 351         for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]);
 352         printk("\n");
 353 #endif
 354
 355         /* locate an available ecb */
 356         spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
 357         ecbno = host->last_ecb_used + 1; /* An optimization */
 358         if (ecbno >= AHA1740_ECBS)
 359                 ecbno = 0;
 360         do {
 361                 if (!host->ecb[ecbno].cmdw)
 362                         break;
 363                 ecbno++;
 364                 if (ecbno >= AHA1740_ECBS)
 365                         ecbno = 0;
 366         } while (ecbno != host->last_ecb_used);
 367
 368         if (host->ecb[ecbno].cmdw)
 369                 panic("Unable to find empty ecb for aha1740.\n");
 370
 371         host->ecb[ecbno].cmdw = AHA1740CMD_INIT; /* SCSI Initiator Command
 372                                                     doubles as reserved flag */
 373
 374         host->last_ecb_used = ecbno;
 375         spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
 376
 377 #ifdef DEBUG
 378         printk("Sending command (%d %x)...", ecbno, done);
 379 #endif
 380
 381         host->ecb[ecbno].cdblen = SCpnt->cmd_len; /* SCSI Command
 382                                                    * Descriptor Block
 383                                                    * Length */
 384
 385         direction = 0;
 386         if (*cmd == READ_10 || *cmd == READ_6)
 387                 direction = 1;
 388         else if (*cmd == WRITE_10 || *cmd == WRITE_6)
 389                 direction = 0;
 390
 391         memcpy(host->ecb[ecbno].cdb, cmd, SCpnt->cmd_len);
 392
 393         SCpnt->host_scribble = dma_alloc_coherent (&host->edev->dev,
 394                                                    sizeof (struct aha1740_sg),
 395                                                    &sg_dma, GFP_ATOMIC);
 396         if(SCpnt->host_scribble == NULL) {
 397                 printk(KERN_WARNING "aha1740: out of memory in queuecommand!\n");
 398                 return 1;
 399         }
 400         sgptr = (struct aha1740_sg *) SCpnt->host_scribble;
 401         sgptr->sg_dma_addr = sg_dma;
 402
 403         nseg = scsi_dma_map(SCpnt);
 404         BUG_ON(nseg < 0);
 405         if (nseg) {
 406                 struct scatterlist *sg;
 407                 struct aha1740_chain * cptr;
 408                 int i;
 409                 DEB(unsigned char * ptr);
 410
 411                 host->ecb[ecbno].sg = 1;  /* SCSI Initiator Command
 412                                            * w/scatter-gather*/
 413                 cptr = sgptr->sg_chain;
 414                 scsi_for_each_sg(SCpnt, sg, nseg, i) {
 415                         cptr[i].datalen = sg_dma_len (sg);
 416                         cptr[i].dataptr = sg_dma_address (sg);
 417                 }
 418                 host->ecb[ecbno].datalen = nseg * sizeof(struct aha1740_chain);
 419                 host->ecb[ecbno].dataptr = sg_dma;
 420 #ifdef DEBUG
 421                 printk("cptr %x: ",cptr);
 422                 ptr = (unsigned char *) cptr;
 423                 for(i=0;i<24;i++) printk("%02x ", ptr[i]);
 424 #endif
 425         } else {
 426                 host->ecb[ecbno].datalen = 0;
 427                 host->ecb[ecbno].dataptr = 0;
 428         }
 429         host->ecb[ecbno].lun = SCpnt->device->lun;
 430         host->ecb[ecbno].ses = 1; /* Suppress underrun errors */
 431         host->ecb[ecbno].dir = direction;
 432         host->ecb[ecbno].ars = 1; /* Yes, get the sense on an error */
 433         host->ecb[ecbno].senselen = 12;
 434         host->ecb[ecbno].senseptr = ecb_cpu_to_dma (SCpnt->device->host,
 435                                                     host->ecb[ecbno].sense);
 436         host->ecb[ecbno].statusptr = ecb_cpu_to_dma (SCpnt->device->host,
 437                                                      host->ecb[ecbno].status);
 438         host->ecb[ecbno].done = done;
 439         host->ecb[ecbno].SCpnt = SCpnt;
 440 #ifdef DEBUG
 441         {
 442                 int i;
 443                 printk("aha1740_command: sending.. ");
 444                 for (i = 0; i < sizeof(host->ecb[ecbno]) - 10; i++)
 445                         printk("%02x ", ((unchar *)&host->ecb[ecbno])[i]);
 446         }
 447         printk("\n");
 448 #endif
 449         if (done) {
 450         /* The Adaptec Spec says the card is so fast that the loops
 451            will only be executed once in the code below. Even if this
 452            was true with the fastest processors when the spec was
 453            written, it doesn't seem to be true with today's fast
 454            processors. We print a warning if the code is executed more
 455            often than LOOPCNT_WARN. If this happens, it should be
 456            investigated. If the count reaches LOOPCNT_MAX, we assume
 457            something is broken; since there is no way to return an
 458            error (the return value is ignored by the mid-level scsi
 459            layer) we have to panic (and maybe that's the best thing we
 460            can do then anyhow). */
 461
 462 #define LOOPCNT_WARN 10         /* excessive mbxout wait -> syslog-msg */
 463 #define LOOPCNT_MAX 1000000     /* mbxout deadlock -> panic() after ~ 2 sec. */
 464                 int loopcnt;
 465                 unsigned int base = SCpnt->device->host->io_port;
 466                 DEB(printk("aha1740[%d] critical section\n",ecbno));
 467
 468                 spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
 469                 for (loopcnt = 0; ; loopcnt++) {
 470                         if (inb(G2STAT(base)) & G2STAT_MBXOUT) break;
 471                         if (loopcnt == LOOPCNT_WARN) {
 472                                 printk("aha1740[%d]_mbxout wait!\n",ecbno);
 473                         }
 474                         if (loopcnt == LOOPCNT_MAX)
 475                                 panic("aha1740.c: mbxout busy!\n");
 476                 }
 477                 outl (ecb_cpu_to_dma (SCpnt->device->host, host->ecb + ecbno),
 478                       MBOXOUT0(base));
 479                 for (loopcnt = 0; ; loopcnt++) {
 480                         if (! (inb(G2STAT(base)) & G2STAT_BUSY)) break;
 481                         if (loopcnt == LOOPCNT_WARN) {
 482                                 printk("aha1740[%d]_attn wait!\n",ecbno);
 483                         }
 484                         if (loopcnt == LOOPCNT_MAX)
 485                                 panic("aha1740.c: attn wait failed!\n");
 486                 }
 487                 outb(ATTN_START | (target & 7), ATTN(base)); /* Start it up */
 488                 spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
 489                 DEB(printk("aha1740[%d] request queued.\n",ecbno));
 490         } else
 491                 printk(KERN_ALERT "aha1740_queuecommand: done can't be NULL\n");
 492         return 0;
 493 }
 494
 495 static DEF_SCSI_QCMD(aha1740_queuecommand)
 496
 497 /* Query the board for its irq_level and irq_type.  Nothing else matters
 498    in enhanced mode on an EISA bus. */
 499
 500 static void aha1740_getconfig(unsigned int base, unsigned int *irq_level,
 501                               unsigned int *irq_type,
 502                               unsigned int *translation)
 503 {
 504         static int intab[] = { 9, 10, 11, 12, 0, 14, 15, 0 };
 505
 506         *irq_level = intab[inb(INTDEF(base)) & 0x7];
 507         *irq_type  = (inb(INTDEF(base)) & 0x8) >> 3;
 508         *translation = inb(RESV1(base)) & 0x1;
 509         outb(inb(INTDEF(base)) | 0x10, INTDEF(base));
 510 }
 511
 512 static int aha1740_biosparam(struct scsi_device *sdev,
 513                              struct block_device *dev,
 514                              sector_t capacity, int* ip)
 515 {
 516         int size = capacity;
 517         int extended = HOSTDATA(sdev->host)->translation;
 518
 519         DEB(printk("aha1740_biosparam\n"));
 520         if (extended && (ip[2] > 1024)) {
 521                 ip[0] = 255;
 522                 ip[1] = 63;
 523                 ip[2] = size / (255 * 63);
 524         } else {
 525                 ip[0] = 64;
 526                 ip[1] = 32;
 527                 ip[2] = size >> 11;
 528         }
 529         return 0;
 530 }
 531
 532 static int aha1740_eh_abort_handler (struct scsi_cmnd *dummy)
 533 {
 534 /*
 535  * From Alan Cox :
 536  * The AHA1740 has firmware handled abort/reset handling. The "head in
 537  * sand" kernel code is correct for once 8)
 538  *
 539  * So we define a dummy handler just to keep the kernel SCSI code as
 540  * quiet as possible...
 541  */
 542
 543         return SUCCESS;
 544 }
 545
 546 static struct scsi_host_template aha1740_template = {
 547         .module           = THIS_MODULE,
 548         .proc_name        = "aha1740",
 549         .show_info        = aha1740_show_info,
 550         .name             = "Adaptec 174x (EISA)",
 551         .queuecommand     = aha1740_queuecommand,
 552         .bios_param       = aha1740_biosparam,
 553         .can_queue        = AHA1740_ECBS,
 554         .this_id          = 7,
 555         .sg_tablesize     = AHA1740_SCATTER,
 556         .eh_abort_handler = aha1740_eh_abort_handler,
 557 };
 558
 559 static int aha1740_probe (struct device *dev)
 560 {
 561         int slotbase, rc;
 562         unsigned int irq_level, irq_type, translation;
 563         struct Scsi_Host *shpnt;
 564         struct aha1740_hostdata *host;
 565         struct eisa_device *edev = to_eisa_device (dev);
 566
 567         DEB(printk("aha1740_probe: \n"));
 568
 569         slotbase = edev->base_addr + EISA_VENDOR_ID_OFFSET;
 570         if (!request_region(slotbase, SLOTSIZE, "aha1740")) /* See if in use */
 571                 return -EBUSY;
 572         if (!aha1740_test_port(slotbase))
 573                 goto err_release_region;
 574         aha1740_getconfig(slotbase,&irq_level,&irq_type,&translation);
 575         if ((inb(G2STAT(slotbase)) &
 576              (G2STAT_MBXOUT|G2STAT_BUSY)) != G2STAT_MBXOUT) {
 577                 /* If the card isn't ready, hard reset it */
 578                 outb(G2CNTRL_HRST, G2CNTRL(slotbase));
 579                 outb(0, G2CNTRL(slotbase));
 580         }
 581         printk(KERN_INFO "Configuring slot %d at IO:%x, IRQ %u (%s)\n",
 582                edev->slot, slotbase, irq_level, irq_type ? "edge" : "level");
 583         printk(KERN_INFO "aha174x: Extended translation %sabled.\n",
 584                translation ? "en" : "dis");
 585         shpnt = scsi_host_alloc(&aha1740_template,
 586                               sizeof(struct aha1740_hostdata));
 587         if(shpnt == NULL)
 588                 goto err_release_region;
 589
 590         shpnt->base = 0;
 591         shpnt->io_port = slotbase;
 592         shpnt->n_io_port = SLOTSIZE;
 593         shpnt->irq = irq_level;
 594         shpnt->dma_channel = 0xff;
 595         host = HOSTDATA(shpnt);
 596         host->edev = edev;
 597         host->translation = translation;
 598         host->ecb_dma_addr = dma_map_single (&edev->dev, host->ecb,
 599                                              sizeof (host->ecb),
 600                                              DMA_BIDIRECTIONAL);
 601         if (!host->ecb_dma_addr) {
 602                 printk (KERN_ERR "aha1740_probe: Couldn't map ECB, giving up\n");
 603                 goto err_host_put;
 604         }
 605
 606         DEB(printk("aha1740_probe: enable interrupt channel %d\n",irq_level));
 607         if (request_irq(irq_level,aha1740_intr_handle,irq_type ? 0 : IRQF_SHARED,
 608                         "aha1740",shpnt)) {
 609                 printk(KERN_ERR "aha1740_probe: Unable to allocate IRQ %d.\n",
 610                        irq_level);
 611                 goto err_unmap;
 612         }
 613
 614         eisa_set_drvdata (edev, shpnt);
 615
 616         rc = scsi_add_host (shpnt, dev);
 617         if (rc)
 618                 goto err_irq;
 619
 620         scsi_scan_host (shpnt);
 621         return 0;
 622
 623  err_irq:
 624         free_irq(irq_level, shpnt);
 625  err_unmap:
 626         dma_unmap_single (&edev->dev, host->ecb_dma_addr,
 627                           sizeof (host->ecb), DMA_BIDIRECTIONAL);
 628  err_host_put:
 629         scsi_host_put (shpnt);
 630  err_release_region:
 631         release_region(slotbase, SLOTSIZE);
 632
 633         return -ENODEV;
 634 }
 635
 636 static int aha1740_remove (struct device *dev)
 637 {
 638         struct Scsi_Host *shpnt = dev_get_drvdata(dev);
 639         struct aha1740_hostdata *host = HOSTDATA (shpnt);
 640
 641         scsi_remove_host(shpnt);
 642
 643         free_irq (shpnt->irq, shpnt);
 644         dma_unmap_single (dev, host->ecb_dma_addr,
 645                           sizeof (host->ecb), DMA_BIDIRECTIONAL);
 646         release_region (shpnt->io_port, SLOTSIZE);
 647
 648         scsi_host_put (shpnt);
 649
 650         return 0;
 651 }
 652
 653 static struct eisa_device_id aha1740_ids[] = {
 654         { "ADP0000" },          /* 1740  */
 655         { "ADP0001" },          /* 1740A */
 656         { "ADP0002" },          /* 1742A */
 657         { "ADP0400" },          /* 1744  */
 658         { "" }
 659 };
 660 MODULE_DEVICE_TABLE(eisa, aha1740_ids);
 661
 662 static struct eisa_driver aha1740_driver = {
 663         .id_table = aha1740_ids,
 664         .driver   = {
 665                 .name    = "aha1740",
 666                 .probe   = aha1740_probe,
 667                 .remove  = aha1740_remove,
 668         },
 669 };
 670
 671 static __init int aha1740_init (void)
 672 {
 673         return eisa_driver_register (&aha1740_driver);
 674 }
 675
 676 static __exit void aha1740_exit (void)
 677 {
 678         eisa_driver_unregister (&aha1740_driver);
 679 }
 680
 681 module_init (aha1740_init);
 682 module_exit (aha1740_exit);
 683
 684 MODULE_LICENSE("GPL");