drivers/scsi/eata

/* */
This source file includes following definitions.
hprint
eata_pio_scsi_done
eata_pio_release
IncStat
eata_pio_int_handler
eata_pio_send_command
eata_pio_queue
eata_pio_abort
eata_pio_reset
get_pio_board_data
get_pio_conf_PIO
print_pio_config
print_selftest
register_pio_HBA
find_pio_ISA
find_pio_EISA
find_pio_PCI
eata_pio_detect
   1 /************************************************************
   2  *                                                          *
   3  *               Linux EATA SCSI PIO driver                 *
   4  *                                                          *
   5  *  based on the CAM document CAM/89-004 rev. 2.0c,         *
   6  *  DPT's driver kit, some internal documents and source,   *
   7  *  and several other Linux scsi drivers and kernel docs.   *
   8  *                                                          *
   9  *  The driver currently:                                   *
  10  *      -supports all EATA-PIO boards                       *
  11  *      -only supports DASD devices                         *
  12  *                                                          *
  13  *  (c)1993,94,95 Michael Neuffer, Alfred Arnold            *
  14  *                neuffer@goofy.zdv.uni-mainz.de            *
  15  *                a.arnold@kfa-juelich.de                   * 
  16  *                                                          *
  17  *  This program is free software; you can redistribute it  *
  18  *  and/or modify it under the terms of the GNU General     *
  19  *  Public License as published by the Free Software        *
  20  *  Foundation; either version 2 of the License, or         *
  21  *  (at your option) any later version.                     *
  22  *                                                          *
  23  *  This program is distributed in the hope that it will be *
  24  *  useful, but WITHOUT ANY WARRANTY; without even the      *
  25  *  implied warranty of MERCHANTABILITY or FITNESS FOR A    *
  26  *  PARTICULAR PURPOSE.  See the GNU General Public License *
  27  *  for more details.                                       *
  28  *                                                          *
  29  *  You should have received a copy of the GNU General      *
  30  *  Public License along with this kernel; if not, write to *
  31  *  the Free Software Foundation, Inc., 675 Mass Ave,       *
  32  *  Cambridge, MA 02139, USA.                               *
  33  *                                                          *
  34  ************************************************************
  35  *  last change: 95/06/20 OS: Linux 1.3.3 + pre1.3 SCSI pat.*
  36  ************************************************************/
  37 
  38 /* Look in eata_pio.h for configuration information */
  39 
  40 #ifdef MODULE
  41 #include <linux/module.h>
  42 #include <linux/version.h>
  43 #endif
  44  
  45 #include <linux/kernel.h>
  46 #include <linux/sched.h>
  47 #include <linux/string.h>
  48 #include <linux/ioport.h>
  49 #include <linux/malloc.h>
  50 #include <linux/in.h>
  51 #include <linux/bios32.h>
  52 #include <linux/pci.h>
  53 #include <linux/proc_fs.h>
  54 #include <asm/io.h>
  55 #include "eata_pio.h"
  56 #include "eata_dma_proc.h"
  57 #include "scsi.h"
  58 #include "sd.h"
  59 
  60 static uint ISAbases[MAXISA] =
  61 {0x1F0, 0x170, 0x330, 0x230};
  62 static uint ISAirqs[MAXISA] =
  63 {14,12,15,11};
  64 static unchar EISAbases[] =
  65 {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
  66 static uint registered_HBAs = 0;
  67 static struct Scsi_Host *last_HBA = NULL;
  68 static struct Scsi_Host *first_HBA = NULL;
  69 static unchar reg_IRQ[] =
  70 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  71 static unchar reg_IRQL[] =
  72 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  73 
  74 static uint internal_command_finished = TRUE;
  75 
  76 static ulong int_counter = 0;
  77 static ulong queue_counter = 0;
  78 
  79 void hprint(char *str)
     /*  */
  80 {
  81     char *hptr =(char *) 0x000b0000;
  82     char *hptr2=(char *) 0x000b00a0; 
  83     char *hptr3=(char *) 0x000b0f00;
  84     int z;
  85     
  86     memmove(hptr,hptr2,24*80*2);
  87     for (z=0; z<strlen(str); z++)
  88         hptr3[z*2]=str[z];
  89     for (; z<80; z++)
  90         hptr3[z*2]=' ';
  91 }
  92 
  93 void eata_pio_scsi_done (Scsi_Cmnd * SCpnt)
     /*  */
  94 {
  95     return;
  96 }   
  97 
  98 #include "eata_pio_proc.c"
  99  
 100 #ifdef MODULE
 101 int eata_pio_release(struct Scsi_Host *sh)
     /*  */
 102 {
 103     if (sh->irq && reg_IRQ[sh->irq] == 1) free_irq(sh->irq);
 104     else reg_IRQ[sh->irq]--;
 105     if (SD(sh)->channel == 0) {
 106         if (sh->io_port && sh->n_io_port)
 107             release_region(sh->io_port, sh->n_io_port);
 108     }
 109     return(TRUE);
 110 }
 111 #endif
 112 
 113 void IncStat(Scsi_Pointer *SCp, uint Increment)
     /*  */
 114 {
 115     SCp->ptr+=Increment; 
 116     if ((SCp->this_residual-=Increment)==0)
 117     {
 118         if ((--SCp->buffers_residual)==0) SCp->Status=FALSE;
 119         else
 120         {
 121             SCp->buffer++;
 122             SCp->ptr=SCp->buffer->address;
 123             SCp->this_residual=SCp->buffer->length;
 124         }
 125     }
 126 }
 127 
 128 void eata_pio_int_handler(int irq, struct pt_regs * regs)
     /*  */
 129 {
 130     uint eata_stat = 0xfffff;
 131     Scsi_Cmnd *cmd;
 132     hostdata *hd;
 133     struct eata_ccb *cp;
 134     uint base;
 135     ulong flags;
 136     uint x,z;
 137     struct Scsi_Host *sh;
 138     ushort zwickel=0;
 139     unchar stat,odd;
 140     
 141     save_flags(flags);
 142     cli();
 143     
 144     for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) {
 145         if (sh->irq != irq)
 146             continue;
 147         if (inb((uint)sh->base + HA_RSTATUS) & HA_SBUSY)
 148             continue;
 149         
 150         int_counter++;
 151         
 152         hd=SD(sh);
 153         
 154         cp = &hd->ccb[0];
 155         cmd = cp->cmd;
 156         base = (uint) cmd->host->base;
 157         
 158         do
 159         {
 160             stat=inb(base+HA_RSTATUS);
 161             if (stat&HA_SDRQ)
 162                 if (cp->DataIn)
 163                 {
 164                     z=256; odd=FALSE;
 165                     while ((cmd->SCp.Status)&&((z>0)||(odd)))
 166                     {
 167                         if (odd) 
 168                         { 
 169                             *(cmd->SCp.ptr)=zwickel>>8; 
 170                             IncStat(&cmd->SCp,1);
 171                             odd=FALSE;
 172                         }
 173                         x=min(z,cmd->SCp.this_residual/2);
 174                         insw(base+HA_RDATA,cmd->SCp.ptr,x);
 175                         z-=x; 
 176                         IncStat(&cmd->SCp,2*x);
 177                         if ((z>0)&&(cmd->SCp.this_residual==1))
 178                         {
 179                             zwickel=inw(base+HA_RDATA); 
 180                             *(cmd->SCp.ptr)=zwickel&0xff;
 181                             IncStat(&cmd->SCp,1); z--; 
 182                             odd=TRUE;
 183                         }
 184                     }
 185                     while (z>0) {
 186                         zwickel=inw(base+HA_RDATA); 
 187                         z--;
 188                     } 
 189                 }
 190                 else /* cp->DataOut */
 191                 {
 192                     odd=FALSE; z=256;
 193                     while ((cmd->SCp.Status)&&((z>0)||(odd)))
 194                     {
 195                         if (odd)
 196                         {
 197                             zwickel+=*(cmd->SCp.ptr)<<8; 
 198                             IncStat(&cmd->SCp,1);
 199                             outw(zwickel,base+HA_RDATA); 
 200                             z--; 
 201                             odd=FALSE; 
 202                         }
 203                         x=min(z,cmd->SCp.this_residual/2);
 204                         outsw(base+HA_RDATA,cmd->SCp.ptr,x);
 205                         z-=x; 
 206                         IncStat(&cmd->SCp,2*x);
 207                         if ((z>0)&&(cmd->SCp.this_residual==1))
 208                         {
 209                             zwickel=*(cmd->SCp.ptr); 
 210                             zwickel&=0xff;
 211                             IncStat(&cmd->SCp,1); 
 212                             odd=TRUE;
 213                         }  
 214                     }
 215                     while (z>0||odd) {
 216                         outw(zwickel,base+HA_RDATA); 
 217                         z--; 
 218                         odd=FALSE;
 219                     }
 220                 }
 221         }
 222         while ((stat&HA_SDRQ)||((stat&HA_SMORE)&&hd->moresupport));
 223         
 224         /* terminate handler if HBA goes busy again, i.e. transfers
 225          * more data */
 226         
 227         if (stat&HA_SBUSY) break;
 228         
 229         /* OK, this is quite stupid, but I haven't found any correct
 230          * way to get HBA&SCSI status so far */
 231         
 232         if (!(inb(base+HA_RSTATUS)&HA_SERROR))
 233         {
 234             cmd->result=(DID_OK<<16); 
 235             hd->devflags|=(1<<cp->cp_id);
 236         }
 237         else if (hd->devflags&1<<cp->cp_id) 
 238             cmd->result=(DID_OK<<16)+0x02;
 239         else cmd->result=(DID_NO_CONNECT<<16);
 240         
 241         if (cp->status == LOCKED) {
 242             cp->status = FREE;
 243             eata_stat = inb(base + HA_RSTATUS);
 244             printk("eata_pio: int_handler, freeing locked queueslot\n");
 245             DBG(DBG_INTR&&DBG_DELAY,DEL2(800));
 246             restore_flags(flags);
 247             return;
 248         }
 249         
 250 #if DBG_INTR2
 251         if (stat != 0x50) 
 252             printk("stat: %#.2x, result: %#.8x\n", stat, cmd->result); 
 253         DBG(DBG_INTR&&DBG_DELAY,DEL2(800));
 254 #endif
 255         
 256         cp->status = FREE;   /* now we can release the slot  */
 257         
 258         restore_flags(flags);
 259         if(cmd->scsi_done != eata_pio_scsi_done) cmd->scsi_done(cmd);
 260         else internal_command_finished = TRUE;
 261         save_flags(flags);
 262         cli();
 263     }
 264     restore_flags(flags);
 265     
 266     return;
 267 }
 268 
 269 inline uint eata_pio_send_command(uint base, unchar command)
     /*  */
 270 {
 271     uint loop = R_LIMIT;
 272     
 273     while (inb(base + HA_RSTATUS) & HA_SBUSY)
 274         if (--loop == 0)
 275             return(TRUE);
 276     
 277     outb(command, base + HA_WCOMMAND);
 278     return(FALSE);
 279 }
 280 
 281 int eata_pio_queue(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
     /*  */
 282 {
 283     uint x, y;
 284     long flags;
 285     uint base;
 286     
 287     hostdata *hd;
 288     struct Scsi_Host *sh;
 289     struct eata_ccb *cp;
 290     
 291     save_flags(flags);
 292     cli();
 293     
 294     queue_counter++;
 295     
 296     if (done == (void *)eata_pio_scsi_done) { 
 297         if (internal_command_finished == TRUE)
 298             internal_command_finished = FALSE;
 299         else 
 300             cmd->result = (DID_ERROR << 16) + QUEUE_FULL;
 301     }
 302     
 303     hd = HD(cmd);
 304     sh = cmd->host;
 305     base = (uint) sh->base;
 306     
 307     /* use only slot 0, as 2001 can handle only one cmd at a time */
 308     
 309     y = x = 0;
 310     
 311     if (hd->ccb[y].status!=FREE) { 
 312         
 313         DBG(DBG_QUEUE, printk("can_queue %d, x %d, y %d\n",sh->can_queue,x,y));
 314 #if DEBUG_EATA
 315         panic("eata_pio: run out of queue slots cmdno:%ld intrno: %ld\n", 
 316               queue_counter, int_counter);
 317 #else
 318         panic("eata_pio: run out of queue slots....\n");
 319 #endif
 320     }
 321     
 322     cp = &hd->ccb[y];
 323     
 324     memset(cp, 0, sizeof(struct eata_ccb));
 325     memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 326         
 327     cp->status = USED;      /* claim free slot */
 328 
 329     DBG(DBG_QUEUE, printk("eata_pio_queue pid %ld, target: %x, lun: %x, y %d\n",
 330                           cmd->pid, cmd->target, cmd->lun, y));
 331     DBG(DBG_QUEUE && DBG_DELAY, DEL2(250));
 332     
 333     cmd->scsi_done = (void *)done;
 334     
 335     switch (cmd->cmnd[0]) {
 336     case CHANGE_DEFINITION: case COMPARE:         case COPY:
 337     case COPY_VERIFY:       case LOG_SELECT:      case MODE_SELECT:
 338     case MODE_SELECT_10:    case SEND_DIAGNOSTIC: case WRITE_BUFFER:
 339     case FORMAT_UNIT:       case REASSIGN_BLOCKS: case RESERVE:
 340     case SEARCH_EQUAL:      case SEARCH_HIGH:     case SEARCH_LOW:
 341     case WRITE_6:           case WRITE_10:        case WRITE_VERIFY:
 342     case UPDATE_BLOCK:      case WRITE_LONG:      case WRITE_SAME:      
 343     case SEARCH_HIGH_12:    case SEARCH_EQUAL_12: case SEARCH_LOW_12:
 344     case WRITE_12:          case WRITE_VERIFY_12: case SET_WINDOW: 
 345     case MEDIUM_SCAN:       case SEND_VOLUME_TAG:            
 346     case 0xea:      /* alternate number for WRITE LONG */
 347         cp->DataOut = TRUE; /* Output mode */
 348         break;
 349     case TEST_UNIT_READY:
 350     default:
 351         cp->DataIn = TRUE;  /* Input mode  */
 352     }
 353     
 354     cp->Interpret = (cmd->target==hd->hostid);
 355     cp->cp_datalen=htonl((ulong)cmd->request_bufflen);
 356     cp->Auto_Req_Sen = FALSE;
 357     cp->cp_reqDMA = htonl(0);
 358     cp->reqlen = 0;
 359     
 360     cp->cp_id = cmd->target;
 361     cp->cp_lun = cmd->lun;
 362     cp->cp_dispri = FALSE;
 363     cp->cp_identify = TRUE;
 364     memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 365     
 366     cp->cp_statDMA = htonl(0);
 367     
 368     cp->cp_viraddr = cp;
 369     cp->cmd = cmd;
 370     cmd->host_scribble = (char *)&hd->ccb[y];   
 371     
 372     if (cmd->use_sg==0)
 373     { 
 374         cmd->SCp.buffers_residual=1;
 375         cmd->SCp.ptr=cmd->request_buffer;
 376         cmd->SCp.this_residual=cmd->request_bufflen;
 377         cmd->SCp.buffer=NULL;
 378     }
 379     else
 380     {
 381         cmd->SCp.buffer=cmd->request_buffer;
 382         cmd->SCp.buffers_residual=cmd->use_sg;
 383         cmd->SCp.ptr=cmd->SCp.buffer->address;
 384         cmd->SCp.this_residual=cmd->SCp.buffer->length;
 385     }
 386     cmd->SCp.Status=(cmd->SCp.this_residual!=0);  /* TRUE as long as bytes 
 387                                                      are to transfer */ 
 388     
 389     if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) 
 390     {
 391         cmd->result = DID_ERROR << 16;
 392         printk("eata_pio_queue target %d, pid %ld, HBA busy, returning DID_ERROR, done.\n",
 393                cmd->target, cmd->pid);
 394         restore_flags(flags);
 395         if(done != (void *)eata_pio_scsi_done) done(cmd);
 396         return (0);
 397     }
 398     while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 399     outsw(base + HA_RDATA, cp, hd->cplen);
 400     outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 401     for (x=0; x<hd->cppadlen; x++) outw(0, base + HA_RDATA);
 402     
 403     DBG(DBG_QUEUE,printk("Queued base %#.4lx pid: %ld target: %x lun: %x "
 404                          "slot %d irq %d\n", (long)sh->base, cmd->pid, 
 405                          cmd->target, cmd->lun, y, sh->irq));
 406     DBG(DBG_QUEUE && DBG_DELAY, DEL2(200));
 407     
 408     restore_flags(flags);
 409     return (0);
 410 }
 411 
 412 int eata_pio_abort(Scsi_Cmnd * cmd)
     /*  */
 413 {
 414     ulong flags;
 415     uint loop = R_LIMIT;
 416     
 417     save_flags(flags);
 418     cli();
 419     
 420     DBG(DBG_ABNORM, printk("eata_pio_abort called pid: %ld target: %x lun: %x reason %x\n",
 421                            cmd->pid, cmd->target, cmd->lun, cmd->abort_reason));
 422     DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 423     
 424     
 425     while (inb((uint)(cmd->host->base) + HA_RAUXSTAT) & HA_ABUSY)
 426         if (--loop == 0) {
 427             printk("eata_pio: abort, timeout error.\n");
 428             restore_flags(flags);
 429             DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 430             return (SCSI_ABORT_ERROR);
 431         }
 432     if (CD(cmd)->status == FREE) {
 433         DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_NOT_RUNNING\n")); 
 434         restore_flags(flags);
 435         return (SCSI_ABORT_NOT_RUNNING);
 436     }
 437     if (CD(cmd)->status == USED) {
 438         DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_BUSY\n"));
 439         restore_flags(flags);
 440         return (SCSI_ABORT_BUSY);  /* SNOOZE */ 
 441     }
 442     if (CD(cmd)->status == RESET) {
 443         restore_flags(flags);
 444         printk("eata_pio: abort, command reset error.\n");
 445         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 446         return (SCSI_ABORT_ERROR);
 447     }
 448     if (CD(cmd)->status == LOCKED) {
 449         restore_flags(flags);
 450         DBG(DBG_ABNORM, printk("eata_pio: abort, queue slot locked.\n"));
 451         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 452         return (SCSI_ABORT_NOT_RUNNING);
 453     } else
 454         panic("eata_pio: abort: invalid slot status\n");
 455 }
 456 
 457 int eata_pio_reset(Scsi_Cmnd * cmd)
     /*  */
 458 {
 459     uint x, z, time, limit = 0;
 460     ulong flags;
 461     unchar success = FALSE;
 462     Scsi_Cmnd *sp; 
 463     
 464     save_flags(flags);
 465     cli();
 466     hprint("reset");
 467     DBG(DBG_ABNORM, printk("eata_pio_reset called pid:%ld target: %x lun: %x "
 468                            "reason %x\n", cmd->pid, cmd->target, cmd->lun, 
 469                            cmd->abort_reason));
 470 
 471     if (HD(cmd)->state == RESET) {
 472         printk("eata_pio_reset: exit, already in reset.\n");
 473         restore_flags(flags);
 474         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 475         return (SCSI_RESET_ERROR);
 476     }
 477     
 478     for (z = 0; z < MAXTARGET; z++) {
 479         HD(cmd)->t_state[0][z] = RESET;
 480         HD(cmd)->t_timeout[0][z] = NO_TIMEOUT;
 481     }
 482     
 483     /* force all slots to be free */
 484     
 485     for (x = 0; x < cmd->host->can_queue; x++) {
 486         
 487         if (HD(cmd)->ccb[x].status == FREE) 
 488             continue;
 489         
 490         sp = HD(cmd)->ccb[x].cmd;
 491         HD(cmd)->ccb[x].status = RESET;
 492         printk("eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 493         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 494         
 495         if (sp == NULL)
 496             panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 497         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 498     }
 499     
 500     /* hard reset the HBA  */
 501     outb((uint) cmd->host->base+HA_WCOMMAND, EATA_CMD_RESET);
 502     
 503     DBG(DBG_ABNORM, printk("eata_pio_reset: board reset done.\n"));
 504     HD(cmd)->state = RESET;
 505     
 506     time = jiffies;
 507     while (jiffies < (time + 300) && limit++ < 10000000);
 508     
 509     DBG(DBG_ABNORM, printk("eata_pio_reset: interrupts disabled, loops %d.\n", limit));
 510     DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 511     
 512     for (x = 0; x < cmd->host->can_queue; x++) {
 513         
 514         /* Skip slots already set free by interrupt */
 515         if (HD(cmd)->ccb[x].status != RESET)
 516             continue;
 517         
 518         sp = HD(cmd)->ccb[x].cmd;
 519         sp->result = DID_RESET << 16;
 520         
 521         /* This mailbox is terminated */
 522         printk("eata_pio_reset: resetted ccb %d.\n",x);
 523         HD(cmd)->ccb[x].status = FREE;
 524         
 525         restore_flags(flags);
 526         sp->scsi_done(sp);
 527         cli();
 528     }
 529     
 530     HD(cmd)->state = FALSE;
 531     restore_flags(flags);
 532     
 533     if (success) { /* hmmm... */
 534         DBG(DBG_ABNORM, printk("eata_pio_reset: exit, success.\n"));
 535         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 536         return (SCSI_RESET_SUCCESS);
 537     } else {
 538         DBG(DBG_ABNORM, printk("eata_pio_reset: exit, wakeup.\n"));
 539         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 540         return (SCSI_RESET_PUNT);
 541     }
 542 }
 543 
 544 char * get_pio_board_data(ulong base, uint irq, uint id, ulong cplen, ushort cppadlen)
     /*  */
 545 {
 546     struct eata_ccb cp;
 547     static char buff[256];
 548     int z;
 549     
 550     memset(&cp, 0, sizeof(struct eata_ccb));
 551     memset(buff, 0, sizeof(buff));
 552     
 553     cp.DataIn = TRUE;     
 554     cp.Interpret = TRUE;   /* Interpret command */
 555     
 556     cp.cp_datalen = htonl(254);  
 557     cp.cp_dataDMA = htonl(0);
 558     
 559     cp.cp_id = id;
 560     cp.cp_lun = 0;
 561     
 562     cp.cp_cdb[0] = INQUIRY;
 563     cp.cp_cdb[1] = 0;
 564     cp.cp_cdb[2] = 0;
 565     cp.cp_cdb[3] = 0;
 566     cp.cp_cdb[4] = 254;
 567     cp.cp_cdb[5] = 0;
 568     
 569     if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP)) return (NULL);
 570     while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 571     outsw(base + HA_RDATA, &cp, cplen);
 572     outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 573     for (z=0; z<cppadlen; z++) outw(0, base + HA_RDATA);
 574     
 575     while (inb(base + HA_RSTATUS) & HA_SBUSY);
 576     if (inb(base + HA_RSTATUS) & HA_SERROR)
 577         return (NULL);
 578     else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 579         return (NULL);
 580     else
 581     {
 582         insw(base+HA_RDATA, &buff, 127);
 583         while (inb(base+HA_RSTATUS)&HA_SDRQ) inw(base+HA_RDATA);
 584         return (buff);
 585     }
 586 }
 587 
 588 int get_pio_conf_PIO(u32 base, struct get_conf *buf)
     /*  */
 589 {
 590     ulong loop = R_LIMIT;
 591     int z;
 592     ushort *p;
 593     
 594     if(check_region(base, 9))  
 595         return (FALSE);
 596     
 597     memset(buf, 0, sizeof(struct get_conf));
 598     
 599     while (inb(base + HA_RSTATUS) & HA_SBUSY)
 600         if (--loop == 0) 
 601             return (FALSE);
 602     
 603     DBG(DBG_PIO && DBG_PROBE,
 604         printk("Issuing PIO READ CONFIG to HBA at %#x\n", base));
 605     eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 606 
 607     loop = R_LIMIT;
 608     for (p = (ushort *) buf; 
 609          (long)p <= ((long)buf + (sizeof(struct get_conf)/ 2)); p++) {
 610         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 611             if (--loop == 0)
 612                 return (FALSE);
 613 
 614         loop = R_LIMIT;
 615         *p = inw(base + HA_RDATA);
 616     }
 617     if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {            /* Error ? */
 618         if (htonl(EATA_SIGNATURE) == buf->signature) {
 619             DBG(DBG_PIO&&DBG_PROBE, printk("EATA Controller found at %#4x "
 620                                            "EATA Level: %x\n", base, 
 621                                            (uint) (buf->version)));
 622             
 623             while (inb(base + HA_RSTATUS) & HA_SDRQ) 
 624                 inw(base + HA_RDATA);
 625             if(ALLOW_DMA_BOARDS == FALSE) {
 626                 for (z = 0; z < MAXISA; z++)
 627                     if (base == ISAbases[z]) {
 628                         buf->IRQ = ISAirqs[z]; 
 629                         break;
 630                     }
 631             }
 632             return (TRUE);
 633         } 
 634     } else {
 635         DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during transfer "
 636                               "for HBA at %x\n", base));
 637     }
 638     return (FALSE);
 639 }
 640 
 641 void print_pio_config(struct get_conf *gc)
     /*  */
 642 {
 643     printk("Please check values: (read config data)\n");
 644     printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n",
 645            (uint) ntohl(gc->len), gc->version,
 646            gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
 647     printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n",
 648            gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2],
 649            gc->scsi_id[1], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
 650     printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n",
 651            gc->IRQ, gc->IRQ_TR, gc->FORCADR, 
 652            gc->MAX_CHAN, gc->ID_qest);
 653     DBG(DPT_DEBUG, DELAY(1400));
 654 }
 655 
 656 static uint print_selftest(uint base)
     /*  */
 657 {
 658     unchar buffer[512];
 659 #ifdef VERBOSE_SETUP
 660     int z;
 661 #endif
 662     
 663     printk("eata_pio: executing controller self test & setup...\n");
 664     while (inb(base+HA_RSTATUS)&HA_SBUSY);
 665     outb(EATA_CMD_PIO_SETUPTEST,base+HA_WCOMMAND);
 666     do {
 667         while (inb(base+HA_RSTATUS)&HA_SBUSY)
 668             /* nothing */ ;
 669         if (inb(base+HA_RSTATUS)&HA_SDRQ)
 670         {
 671             insw(base+HA_RDATA,&buffer,256);
 672 #ifdef VERBOSE_SETUP
 673             /* no beeps please... */
 674             for (z=0; z < 511 && buffer[z]; z++)
 675                 if (buffer[z] != 7) printk("%c", buffer[z]);
 676 #endif
 677         }
 678     } while (inb(base+HA_RSTATUS)&(HA_SBUSY|HA_SDRQ));
 679     
 680     return (!(inb(base+HA_RSTATUS)&HA_SERROR)); 
 681 }
 682 
 683 int register_pio_HBA(long base, struct get_conf *gc, Scsi_Host_Template * tpnt)
     /*  */
 684 {
 685     ulong size = 0;
 686     char *buff;
 687     ulong cplen;
 688     ushort cppadlen;
 689     struct Scsi_Host *sh;
 690     hostdata *hd;
 691     
 692     DBG(DBG_REGISTER, print_pio_config(gc));
 693     
 694     if (gc->DMA_support == TRUE) {
 695         printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n",base);
 696         if(ALLOW_DMA_BOARDS == FALSE)
 697             return (FALSE);
 698     }
 699     
 700     if ((buff = get_pio_board_data((uint)base, gc->IRQ, gc->scsi_id[3], 
 701                                cplen   =(htonl(gc->cplen   )+1)/2, 
 702                                cppadlen=(htons(gc->cppadlen)+1)/2)) == NULL)
 703     {
 704         printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (ulong) base);
 705         return (FALSE);
 706     }
 707     
 708     if (print_selftest(base) == FALSE && ALLOW_DMA_BOARDS == FALSE)
 709     {
 710         printk("HBA at %#lx failed while performing self test & setup.\n", 
 711                (ulong) base);
 712         return (FALSE);
 713     }
 714     
 715     if (!reg_IRQ[gc->IRQ]) {    /* Interrupt already registered ? */
 716         if (!request_irq(gc->IRQ, eata_pio_int_handler, SA_INTERRUPT, 
 717                          "EATA-PIO")){
 718             reg_IRQ[gc->IRQ]++;
 719             if (!gc->IRQ_TR)
 720                 reg_IRQL[gc->IRQ] = TRUE;   /* IRQ is edge triggered */
 721         } else {
 722             printk("Couldn't allocate IRQ %d, Sorry.", gc->IRQ);
 723             return (FALSE);
 724         }
 725     } else {            /* More than one HBA on this IRQ */
 726         if (reg_IRQL[gc->IRQ] == TRUE) {
 727             printk("Can't support more than one HBA on this IRQ,\n"
 728                    "  if the IRQ is edge triggered. Sorry.\n");
 729             return (FALSE);
 730         } else
 731             reg_IRQ[gc->IRQ]++;
 732     }
 733     
 734     request_region(base, 8, "eata_pio");
 735     
 736     size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
 737     
 738     sh = scsi_register(tpnt, size);
 739     hd = SD(sh);                   
 740     
 741     memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
 742     memset(hd->reads, 0, sizeof(ulong) * 26); 
 743     
 744     strncpy(SD(sh)->vendor, &buff[8], 8);
 745     SD(sh)->vendor[8] = 0;
 746     strncpy(SD(sh)->name, &buff[16], 17);
 747     SD(sh)->name[17] = 0;
 748     SD(sh)->revision[0] = buff[32];
 749     SD(sh)->revision[1] = buff[33];
 750     SD(sh)->revision[2] = buff[34];
 751     SD(sh)->revision[3] = '.';
 752     SD(sh)->revision[4] = buff[35];
 753     SD(sh)->revision[5] = 0;
 754     switch (ntohl(gc->len)) {
 755     case 0x1c:
 756         SD(sh)->EATA_revision = 'a';
 757         break;
 758     case 0x1e:
 759         SD(sh)->EATA_revision = 'b';
 760         break;
 761     case 0x22:
 762         SD(sh)->EATA_revision = 'c';
 763         break;
 764     default:
 765         SD(sh)->EATA_revision = '?';
 766     }
 767     SD(sh)->cplen=cplen;
 768     SD(sh)->cppadlen=cppadlen;
 769     SD(sh)->hostid=gc->scsi_id[3];
 770     SD(sh)->devflags=1<<gc->scsi_id[3];
 771     SD(sh)->moresupport=gc->MORE_support;
 772     sh->base = (char *) base;
 773     sh->io_port = (ushort) base;
 774     sh->n_io_port = 8;
 775     sh->irq = gc->IRQ;
 776     sh->dma_channel = 0xfe;  /* PIO */
 777     sh->this_id = gc->scsi_id[3];
 778     sh->can_queue = 1;
 779     sh->cmd_per_lun = 1;
 780     sh->sg_tablesize = SG_ALL;
 781     
 782     hd->channel = 0;
 783     
 784     if(ntohl(gc->len) >= 0x22) {
 785         if (gc->is_PCI == TRUE)
 786             hd->bustype = IS_PCI;
 787         else if (gc->is_EISA == TRUE)
 788             hd->bustype = IS_EISA;
 789         else
 790             hd->bustype = IS_ISA;
 791     } else {
 792         if (buff[21] == '4')
 793             hd->bustype = IS_PCI;
 794         else if (buff[21] == '2')
 795             hd->bustype = IS_EISA;
 796         else
 797             hd->bustype = IS_ISA;
 798     }
 799   
 800     sh->max_id = 8;
 801     sh->max_lun = 8;
 802 
 803     if (gc->SECOND)
 804         hd->primary = FALSE;
 805     else
 806         hd->primary = TRUE;
 807     
 808     sh->unchecked_isa_dma = FALSE; /* We can only do PIO */
 809     
 810     hd->next = NULL;    /* build a linked list of all HBAs */
 811     hd->prev = last_HBA;
 812     if(hd->prev != NULL)
 813         SD(hd->prev)->next = sh;
 814     last_HBA = sh;
 815     if (first_HBA == NULL)
 816         first_HBA = sh;
 817     registered_HBAs++;
 818     return (1);
 819 }
 820 
 821 void find_pio_ISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
 822 {
 823     int i;
 824     
 825     for (i = 0; i < MAXISA; i++) {  
 826         if (ISAbases[i]) {  
 827             if (get_pio_conf_PIO(ISAbases[i], buf) == TRUE){
 828                 register_pio_HBA(ISAbases[i], buf, tpnt);
 829             }
 830             ISAbases[i] = 0;
 831         }
 832     }
 833     return;
 834 }
 835 
 836 void find_pio_EISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
 837 {
 838     u32 base;
 839     int i;
 840 
 841 #if CHECKPAL
 842     u8 pal1, pal2, pal3;
 843 #endif
 844 
 845     for (i = 0; i < MAXEISA; i++) {
 846         if (EISAbases[i] == TRUE) { /* Still a possibility ?          */
 847 
 848             base = 0x1c88 + (i * 0x1000);
 849 #if CHECKPAL
 850             pal1 = inb((u16)base - 8);
 851             pal2 = inb((u16)base - 7);
 852             pal3 = inb((u16)base - 6);
 853 
 854             if (((pal1 == 0x12) && (pal2 == 0x14)) ||
 855                 ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) ||
 856                 ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 857                 DBG(DBG_PROBE, printk("EISA EATA id tags found: %x %x %x \n",
 858                                       (int)pal1, (int)pal2, (int)pal3));
 859 #endif
 860                 if (get_pio_conf_PIO(base, buf) == TRUE) {
 861                     DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 862                     if (buf->IRQ) {
 863                         register_pio_HBA(base, buf, tpnt);
 864                     } else
 865                         printk("eata_dma: No valid IRQ. HBA removed from list\n");
 866                 }
 867                 /* Nothing found here so we take it from the list */
 868                 EISAbases[i] = 0;
 869 #if CHECKPAL
 870             }
 871 #endif
 872         }
 873     }
 874     return;
 875 }
 876 
 877 void find_pio_PCI(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
 878 {
 879 
 880 #ifndef CONFIG_PCI
 881     printk("Kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 882 #else
 883     
 884     u8 pci_bus, pci_device_fn;
 885     static s16 pci_index = 0;   /* Device index to PCI BIOS calls */
 886     u32 base = 0;
 887     u16 com_adr;
 888     u16 rev_device;
 889     u32 error, i, x;
 890 
 891     if (pcibios_present()) {
 892         for (i = 0; i <= MAXPCI; ++i, ++pci_index) {
 893             if (pcibios_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, 
 894                                     pci_index, &pci_bus, &pci_device_fn))
 895                 break;
 896             DBG(DBG_PROBE && DBG_PCI, 
 897                 printk("eata_pio: HBA at bus %d, device %d,"
 898                        " function %d, index %d\n", (s32)pci_bus, 
 899                        (s32)((pci_device_fn & 0xf8) >> 3),
 900                        (s32)(pci_device_fn & 7), pci_index));
 901             
 902             if (!(error = pcibios_read_config_word(pci_bus, pci_device_fn, 
 903                                        PCI_CLASS_DEVICE, &rev_device))) {
 904                 if (rev_device == PCI_CLASS_STORAGE_SCSI) {
 905                     if (!(error = pcibios_read_config_word(pci_bus, 
 906                                                pci_device_fn, PCI_COMMAND, 
 907                                                (u16 *) & com_adr))) {
 908                         if (!((com_adr & PCI_COMMAND_IO) && 
 909                               (com_adr & PCI_COMMAND_MASTER))) {
 910                             printk("HBA has IO or BUSMASTER mode disabled\n");
 911                             continue;
 912                         }
 913                     } else
 914                         printk("eata_pio: error %x while reading "
 915                                "PCI_COMMAND\n", error);
 916                 } else
 917                     printk("DEVICECLASSID %x didn't match\n", rev_device);
 918             } else {
 919                 printk("eata_pio: error %x while reading PCI_CLASS_BASE\n", 
 920                        error);
 921                 continue;
 922             }
 923             
 924             if (!(error = pcibios_read_config_dword(pci_bus, pci_device_fn,
 925                                        PCI_BASE_ADDRESS_0, (int *) &base))){
 926                 
 927                 /* Check if the address is valid */
 928                 if (base & 0x01) {
 929                     base &= 0xfffffffe;
 930                     /* EISA tag there ? */
 931                     if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 932                         continue;   /* Jep, it's forced, so move on  */
 933                     base += 0x10;   /* Now, THIS is the real address */
 934                     if (base != 0x1f8) {
 935                         /* We didn't find it in the primary search */
 936                         if (get_pio_conf_PIO(base, buf) == TRUE) {
 937                             if (buf->FORCADR)   /* If the address is forced */
 938                                 continue;       /* we'll find it later      */
 939                             
 940                             /* OK. We made it till here, so we can go now  
 941                              * and register it. We  only have to check and 
 942                              * eventually remove it from the EISA and ISA list 
 943                              */
 944                             
 945                             register_pio_HBA(base, buf, tpnt);
 946                             
 947                             if (base < 0x1000) {
 948                                 for (x = 0; x < MAXISA; ++x) {
 949                                     if (ISAbases[x] == base) {
 950                                         ISAbases[x] = 0;
 951                                         break;
 952                                     }
 953                                 }
 954                             } else if ((base & 0x0fff) == 0x0c88) {
 955                                 x = (base >> 12) & 0x0f;
 956                                 EISAbases[x] = 0;
 957                             }
 958                             continue;  /* break; */
 959                         }
 960                     }
 961                 }
 962             } else
 963                 printk("eata_pio: error %x while reading "
 964                        "PCI_BASE_ADDRESS_0\n", error);
 965         }
 966     } else
 967         printk("No BIOS32 extensions present. This eata_pio release "
 968                "still depends on it.\n"
 969                "Skipping scan for PCI HBAs. Sorry.\n");
 970 #endif /* #ifndef CONFIG_PCI */
 971     return;
 972 }
 973 
 974 
 975 int eata_pio_detect(Scsi_Host_Template * tpnt)
     /*  */
 976 {
 977     struct Scsi_Host *HBA_ptr;
 978     struct get_conf gc;
 979     int i;
 980     
 981     DBG((DBG_PROBE && DBG_DELAY) || DPT_DEBUG,
 982         printk("Using lots of delays to let you read the debugging output\n"));
 983     
 984 #ifndef DBG_EISA
 985 
 986 printk("DBG_EISA not defined !!!\n");
 987 
 988 #endif
 989 
 990     find_pio_PCI(&gc, tpnt);
 991 
 992     find_pio_EISA(&gc, tpnt);
 993 
 994     find_pio_ISA(&gc, tpnt);
 995     
 996     for (i = 0; i <= MAXIRQ; i++)
 997         if (reg_IRQ[i])
 998             request_irq(i, eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO");
 999     
1000     HBA_ptr = first_HBA;
1001   
1002     if (registered_HBAs != 0) {
1003         printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
1004                "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n"
1005                "            Alfred Arnold,   a.arnold@kfa-juelich.de\n"
1006                "This release only supports DASD devices (harddisks)\n",
1007                VER_MAJOR, VER_MINOR, VER_SUB);
1008         
1009         printk("Registered HBAs:\n");
1010         printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr: QS: SG: CPL:\n");
1011         for (i = 1; i <= registered_HBAs; i++) {
1012             printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4x   %2d   %d   %d   %c  %2d  %2d  %2d\n", 
1013                    HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
1014                    SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P')?
1015                    "PCI ":(SD(HBA_ptr)->bustype == 'E')?"EISA":"ISA ",
1016                    (uint) HBA_ptr->base, HBA_ptr->irq, 
1017                    SD(HBA_ptr)->channel, HBA_ptr->this_id, (SD(HBA_ptr)->primary == TRUE)?'Y':'N', 
1018                    HBA_ptr->can_queue, HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
1019             HBA_ptr = SD(HBA_ptr)->next;
1020         }
1021     }
1022     DBG(DPT_DEBUG,DELAY(1200));
1023     
1024     return (registered_HBAs);
1025 }
1026 
1027 #ifdef MODULE
1028 /* Eventually this will go into an include file, but this will be later */
1029 Scsi_Host_Template driver_template = EATA_PIO;
1030 
1031 #include "scsi_module.c"
1032 #endif
1033 
1034 /*
1035  * Overrides for Emacs so that we almost follow Linus's tabbing style.
1036  * Emacs will notice this stuff at the end of the file and automatically
1037  * adjust the settings for this buffer only.  This must remain at the end
1038  * of the file.
1039  * ---------------------------------------------------------------------------
1040  * Local variables:
1041  * c-indent-level: 4
1042  * c-brace-imaginary-offset: 0
1043  * c-brace-offset: -4
1044  * c-argdecl-indent: 4
1045  * c-label-offset: -4
1046  * c-continued-statement-offset: 4
1047  * c-continued-brace-offset: 0
1048  * indent-tabs-mode: nil
1049  * tab-width: 8
1050  * End:
1051  */
/* */
root/drivers/scsi/eata_pio.c

DEFINITIONS
