drivers/scsi/eata

/* */
This source file includes following definitions.
hprint
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: 95/08/04                 OS: Linux 1.3.15  *
  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 ulong int_counter = 0;
  75 static ulong queue_counter = 0;
  76 
  77 void hprint(const char *str)
     /*  */
  78 {
  79     char *hptr =(char *) 0x000b0000;
  80     char *hptr2=(char *) 0x000b00a0; 
  81     char *hptr3=(char *) 0x000b0f00;
  82     int z;
  83     
  84     memmove(hptr,hptr2,24*80*2);
  85     for (z=0; z<strlen(str); z++)
  86         hptr3[z*2]=str[z];
  87     for (; z<80; z++)
  88         hptr3[z*2]=' ';
  89 }
  90 
  91 
  92 #include "eata_pio_proc.c"
  93  
  94 #ifdef MODULE
  95 int eata_pio_release(struct Scsi_Host *sh)
     /*  */
  96 {
  97     if (sh->irq && reg_IRQ[sh->irq] == 1) free_irq(sh->irq);
  98     else reg_IRQ[sh->irq]--;
  99     if (SD(sh)->channel == 0) {
 100         if (sh->io_port && sh->n_io_port)
 101             release_region(sh->io_port, sh->n_io_port);
 102     }
 103     return(TRUE);
 104 }
 105 #endif
 106 
 107 void IncStat(Scsi_Pointer *SCp, uint Increment)
     /*  */
 108 {
 109     SCp->ptr+=Increment; 
 110     if ((SCp->this_residual-=Increment)==0)
 111     {
 112         if ((--SCp->buffers_residual)==0) SCp->Status=FALSE;
 113         else
 114         {
 115             SCp->buffer++;
 116             SCp->ptr=SCp->buffer->address;
 117             SCp->this_residual=SCp->buffer->length;
 118         }
 119     }
 120 }
 121 
 122 void eata_pio_int_handler(int irq, struct pt_regs * regs)
     /*  */
 123 {
 124     uint eata_stat = 0xfffff;
 125     Scsi_Cmnd *cmd;
 126     hostdata *hd;
 127     struct eata_ccb *cp;
 128     uint base;
 129     ulong flags;
 130     uint x,z;
 131     struct Scsi_Host *sh;
 132     ushort zwickel=0;
 133     unchar stat,odd;
 134     
 135     save_flags(flags);
 136     cli();
 137     
 138     for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) {
 139         if (sh->irq != irq)
 140             continue;
 141         if (inb((uint)sh->base + HA_RSTATUS) & HA_SBUSY)
 142             continue;
 143         
 144         int_counter++;
 145         
 146         hd=SD(sh);
 147         
 148         cp = &hd->ccb[0];
 149         cmd = cp->cmd;
 150         base = (uint) cmd->host->base;
 151         
 152         do
 153         {
 154             stat=inb(base+HA_RSTATUS);
 155             if (stat&HA_SDRQ)
 156                 if (cp->DataIn)
 157                 {
 158                     z=256; odd=FALSE;
 159                     while ((cmd->SCp.Status)&&((z>0)||(odd)))
 160                     {
 161                         if (odd) 
 162                         { 
 163                             *(cmd->SCp.ptr)=zwickel>>8; 
 164                             IncStat(&cmd->SCp,1);
 165                             odd=FALSE;
 166                         }
 167                         x=min(z,cmd->SCp.this_residual/2);
 168                         insw(base+HA_RDATA,cmd->SCp.ptr,x);
 169                         z-=x; 
 170                         IncStat(&cmd->SCp,2*x);
 171                         if ((z>0)&&(cmd->SCp.this_residual==1))
 172                         {
 173                             zwickel=inw(base+HA_RDATA); 
 174                             *(cmd->SCp.ptr)=zwickel&0xff;
 175                             IncStat(&cmd->SCp,1); z--; 
 176                             odd=TRUE;
 177                         }
 178                     }
 179                     while (z>0) {
 180                         zwickel=inw(base+HA_RDATA); 
 181                         z--;
 182                     } 
 183                 }
 184                 else /* cp->DataOut */
 185                 {
 186                     odd=FALSE; z=256;
 187                     while ((cmd->SCp.Status)&&((z>0)||(odd)))
 188                     {
 189                         if (odd)
 190                         {
 191                             zwickel+=*(cmd->SCp.ptr)<<8; 
 192                             IncStat(&cmd->SCp,1);
 193                             outw(zwickel,base+HA_RDATA); 
 194                             z--; 
 195                             odd=FALSE; 
 196                         }
 197                         x=min(z,cmd->SCp.this_residual/2);
 198                         outsw(base+HA_RDATA,cmd->SCp.ptr,x);
 199                         z-=x; 
 200                         IncStat(&cmd->SCp,2*x);
 201                         if ((z>0)&&(cmd->SCp.this_residual==1))
 202                         {
 203                             zwickel=*(cmd->SCp.ptr); 
 204                             zwickel&=0xff;
 205                             IncStat(&cmd->SCp,1); 
 206                             odd=TRUE;
 207                         }  
 208                     }
 209                     while (z>0||odd) {
 210                         outw(zwickel,base+HA_RDATA); 
 211                         z--; 
 212                         odd=FALSE;
 213                     }
 214                 }
 215         }
 216         while ((stat&HA_SDRQ)||((stat&HA_SMORE)&&hd->moresupport));
 217         
 218         /* terminate handler if HBA goes busy again, i.e. transfers
 219          * more data */
 220         
 221         if (stat&HA_SBUSY) break;
 222         
 223         /* OK, this is quite stupid, but I haven't found any correct
 224          * way to get HBA&SCSI status so far */
 225         
 226         if (!(inb(base+HA_RSTATUS)&HA_SERROR))
 227         {
 228             cmd->result=(DID_OK<<16); 
 229             hd->devflags|=(1<<cp->cp_id);
 230         }
 231         else if (hd->devflags&1<<cp->cp_id) 
 232             cmd->result=(DID_OK<<16)+0x02;
 233         else cmd->result=(DID_NO_CONNECT<<16);
 234         
 235         if (cp->status == LOCKED) {
 236             cp->status = FREE;
 237             eata_stat = inb(base + HA_RSTATUS);
 238             printk("eata_pio: int_handler, freeing locked queueslot\n");
 239             DBG(DBG_INTR&&DBG_DELAY,DEL2(800));
 240             restore_flags(flags);
 241             return;
 242         }
 243         
 244 #if DBG_INTR2
 245         if (stat != 0x50) 
 246             printk("stat: %#.2x, result: %#.8x\n", stat, cmd->result); 
 247         DBG(DBG_INTR&&DBG_DELAY,DEL2(800));
 248 #endif
 249         
 250         cp->status = FREE;   /* now we can release the slot  */
 251         
 252         restore_flags(flags);
 253         cmd->scsi_done(cmd);
 254         save_flags(flags);
 255         cli();
 256     }
 257     restore_flags(flags);
 258     
 259     return;
 260 }
 261 
 262 inline uint eata_pio_send_command(uint base, unchar command)
     /*  */
 263 {
 264     uint loop = R_LIMIT;
 265     
 266     while (inb(base + HA_RSTATUS) & HA_SBUSY)
 267         if (--loop == 0)
 268             return(TRUE);
 269     
 270     outb(command, base + HA_WCOMMAND);
 271     return(FALSE);
 272 }
 273 
 274 int eata_pio_queue(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
     /*  */
 275 {
 276     uint x, y;
 277     long flags;
 278     uint base;
 279     
 280     hostdata *hd;
 281     struct Scsi_Host *sh;
 282     struct eata_ccb *cp;
 283     
 284     save_flags(flags);
 285     cli();
 286     
 287     queue_counter++;
 288     
 289     hd = HD(cmd);
 290     sh = cmd->host;
 291     base = (uint) sh->base;
 292     
 293     /* use only slot 0, as 2001 can handle only one cmd at a time */
 294     
 295     y = x = 0;
 296     
 297     if (hd->ccb[y].status!=FREE) { 
 298         
 299         DBG(DBG_QUEUE, printk("can_queue %d, x %d, y %d\n",sh->can_queue,x,y));
 300 #if DEBUG_EATA
 301         panic("eata_pio: run out of queue slots cmdno:%ld intrno: %ld\n", 
 302               queue_counter, int_counter);
 303 #else
 304         panic("eata_pio: run out of queue slots....\n");
 305 #endif
 306     }
 307     
 308     cp = &hd->ccb[y];
 309     
 310     memset(cp, 0, sizeof(struct eata_ccb));
 311     memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 312         
 313     cp->status = USED;      /* claim free slot */
 314 
 315     DBG(DBG_QUEUE, printk("eata_pio_queue pid %ld, target: %x, lun: %x, y %d\n",
 316                           cmd->pid, cmd->target, cmd->lun, y));
 317     DBG(DBG_QUEUE && DBG_DELAY, DEL2(250));
 318     
 319     cmd->scsi_done = (void *)done;
 320     
 321     switch (cmd->cmnd[0]) {
 322     case CHANGE_DEFINITION: case COMPARE:         case COPY:
 323     case COPY_VERIFY:       case LOG_SELECT:      case MODE_SELECT:
 324     case MODE_SELECT_10:    case SEND_DIAGNOSTIC: case WRITE_BUFFER:
 325     case FORMAT_UNIT:       case REASSIGN_BLOCKS: case RESERVE:
 326     case SEARCH_EQUAL:      case SEARCH_HIGH:     case SEARCH_LOW:
 327     case WRITE_6:           case WRITE_10:        case WRITE_VERIFY:
 328     case UPDATE_BLOCK:      case WRITE_LONG:      case WRITE_SAME:      
 329     case SEARCH_HIGH_12:    case SEARCH_EQUAL_12: case SEARCH_LOW_12:
 330     case WRITE_12:          case WRITE_VERIFY_12: case SET_WINDOW: 
 331     case MEDIUM_SCAN:       case SEND_VOLUME_TAG:            
 332     case 0xea:      /* alternate number for WRITE LONG */
 333         cp->DataOut = TRUE; /* Output mode */
 334         break;
 335     case TEST_UNIT_READY:
 336     default:
 337         cp->DataIn = TRUE;  /* Input mode  */
 338     }
 339     
 340     cp->Interpret = (cmd->target == hd->hostid);
 341     cp->cp_datalen = htonl((ulong)cmd->request_bufflen);
 342     cp->Auto_Req_Sen = FALSE;
 343     cp->cp_reqDMA = htonl(0);
 344     cp->reqlen = 0;
 345     
 346     cp->cp_id = cmd->target;
 347     cp->cp_lun = cmd->lun;
 348     cp->cp_dispri = FALSE;
 349     cp->cp_identify = TRUE;
 350     memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 351     
 352     cp->cp_statDMA = htonl(0);
 353     
 354     cp->cp_viraddr = cp;
 355     cp->cmd = cmd;
 356     cmd->host_scribble = (char *)&hd->ccb[y];   
 357     
 358     if (cmd->use_sg == 0)
 359     { 
 360         cmd->SCp.buffers_residual=1;
 361         cmd->SCp.ptr = cmd->request_buffer;
 362         cmd->SCp.this_residual = cmd->request_bufflen;
 363         cmd->SCp.buffer = NULL;
 364     } else {
 365         cmd->SCp.buffer = cmd->request_buffer;
 366         cmd->SCp.buffers_residual = cmd->use_sg;
 367         cmd->SCp.ptr = cmd->SCp.buffer->address;
 368         cmd->SCp.this_residual = cmd->SCp.buffer->length;
 369     }
 370     cmd->SCp.Status = (cmd->SCp.this_residual != 0);  /* TRUE as long as bytes 
 371                                                        * are to transfer */ 
 372     
 373     if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) 
 374     {
 375         cmd->result = DID_ERROR << 16;
 376         printk("eata_pio_queue target %d, pid %ld, HBA busy, returning "
 377                "DID_ERROR, done.\n", cmd->target, cmd->pid);
 378         restore_flags(flags);
 379         done(cmd);
 380         return (0);
 381     }
 382     while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 383     outsw(base + HA_RDATA, cp, hd->cplen);
 384     outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 385     for (x = 0; x < hd->cppadlen; x++) outw(0, base + HA_RDATA);
 386     
 387     DBG(DBG_QUEUE,printk("Queued base %#.4lx pid: %ld target: %x lun: %x "
 388                          "slot %d irq %d\n", (long)sh->base, cmd->pid, 
 389                          cmd->target, cmd->lun, y, sh->irq));
 390     DBG(DBG_QUEUE && DBG_DELAY, DEL2(200));
 391     
 392     restore_flags(flags);
 393     return (0);
 394 }
 395 
 396 int eata_pio_abort(Scsi_Cmnd * cmd)
     /*  */
 397 {
 398     ulong flags;
 399     uint loop = R_LIMIT;
 400     
 401     save_flags(flags);
 402     cli();
 403     
 404     DBG(DBG_ABNORM, printk("eata_pio_abort called pid: %ld target: %x lun: %x"
 405                            " reason %x\n", cmd->pid, cmd->target, cmd->lun, 
 406                            cmd->abort_reason));
 407     DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 408     
 409     
 410     while (inb((uint)(cmd->host->base) + HA_RAUXSTAT) & HA_ABUSY)
 411         if (--loop == 0) {
 412             printk("eata_pio: abort, timeout error.\n");
 413             restore_flags(flags);
 414             DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 415             return (SCSI_ABORT_ERROR);
 416         }
 417     if (CD(cmd)->status == FREE) {
 418         DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_NOT_RUNNING\n")); 
 419         restore_flags(flags);
 420         return (SCSI_ABORT_NOT_RUNNING);
 421     }
 422     if (CD(cmd)->status == USED) {
 423         DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_BUSY\n"));
 424         restore_flags(flags);
 425         return (SCSI_ABORT_BUSY);  /* SNOOZE */ 
 426     }
 427     if (CD(cmd)->status == RESET) {
 428         restore_flags(flags);
 429         printk("eata_pio: abort, command reset error.\n");
 430         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 431         return (SCSI_ABORT_ERROR);
 432     }
 433     if (CD(cmd)->status == LOCKED) {
 434         restore_flags(flags);
 435         DBG(DBG_ABNORM, printk("eata_pio: abort, queue slot locked.\n"));
 436         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 437         return (SCSI_ABORT_NOT_RUNNING);
 438     }
 439     restore_flags(flags);
 440     panic("eata_pio: abort: invalid slot status\n");
 441 }
 442 
 443 int eata_pio_reset(Scsi_Cmnd * cmd)
     /*  */
 444 {
 445     uint x, z, time, limit = 0;
 446     ulong flags;
 447     unchar success = FALSE;
 448     Scsi_Cmnd *sp; 
 449     
 450     save_flags(flags);
 451     cli();
 452     hprint("reset");
 453     DBG(DBG_ABNORM, printk("eata_pio_reset called pid:%ld target: %x lun: %x "
 454                            "reason %x\n", cmd->pid, cmd->target, cmd->lun, 
 455                            cmd->abort_reason));
 456 
 457     if (HD(cmd)->state == RESET) {
 458         printk("eata_pio_reset: exit, already in reset.\n");
 459         restore_flags(flags);
 460         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 461         return (SCSI_RESET_ERROR);
 462     }
 463     
 464     for (z = 0; z < MAXTARGET; z++) {
 465         HD(cmd)->t_state[0][z] = RESET;
 466         HD(cmd)->t_timeout[0][z] = NO_TIMEOUT;
 467     }
 468     
 469     /* force all slots to be free */
 470     
 471     for (x = 0; x < cmd->host->can_queue; x++) {
 472         
 473         if (HD(cmd)->ccb[x].status == FREE) 
 474             continue;
 475         
 476         sp = HD(cmd)->ccb[x].cmd;
 477         HD(cmd)->ccb[x].status = RESET;
 478         printk("eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 479         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 480         
 481         if (sp == NULL)
 482             panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 483         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 484     }
 485     
 486     /* hard reset the HBA  */
 487     outb((uint) cmd->host->base+HA_WCOMMAND, EATA_CMD_RESET);
 488     
 489     DBG(DBG_ABNORM, printk("eata_pio_reset: board reset done.\n"));
 490     HD(cmd)->state = RESET;
 491     
 492     time = jiffies;
 493     while (jiffies < (time + (3 * HZ)) && limit++ < 10000000);
 494     
 495     DBG(DBG_ABNORM, printk("eata_pio_reset: interrupts disabled, loops %d.\n", limit));
 496     DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 497     
 498     for (x = 0; x < cmd->host->can_queue; x++) {
 499         
 500         /* Skip slots already set free by interrupt */
 501         if (HD(cmd)->ccb[x].status != RESET)
 502             continue;
 503         
 504         sp = HD(cmd)->ccb[x].cmd;
 505         sp->result = DID_RESET << 16;
 506         
 507         /* This mailbox is terminated */
 508         printk("eata_pio_reset: resetted ccb %d.\n",x);
 509         HD(cmd)->ccb[x].status = FREE;
 510         
 511         restore_flags(flags);
 512         sp->scsi_done(sp);
 513         cli();
 514     }
 515     
 516     HD(cmd)->state = FALSE;
 517     restore_flags(flags);
 518     
 519     if (success) { /* hmmm... */
 520         DBG(DBG_ABNORM, printk("eata_pio_reset: exit, success.\n"));
 521         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 522         return (SCSI_RESET_SUCCESS);
 523     } else {
 524         DBG(DBG_ABNORM, printk("eata_pio_reset: exit, wakeup.\n"));
 525         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 526         return (SCSI_RESET_PUNT);
 527     }
 528 }
 529 
 530 char * get_pio_board_data(ulong base, uint irq, uint id, ulong cplen, ushort cppadlen)
     /*  */
 531 {
 532     struct eata_ccb cp;
 533     static char buff[256];
 534     int z;
 535     
 536     memset(&cp, 0, sizeof(struct eata_ccb));
 537     memset(buff, 0, sizeof(buff));
 538     
 539     cp.DataIn = TRUE;     
 540     cp.Interpret = TRUE;   /* Interpret command */
 541     
 542     cp.cp_datalen = htonl(254);  
 543     cp.cp_dataDMA = htonl(0);
 544     
 545     cp.cp_id = id;
 546     cp.cp_lun = 0;
 547     
 548     cp.cp_cdb[0] = INQUIRY;
 549     cp.cp_cdb[1] = 0;
 550     cp.cp_cdb[2] = 0;
 551     cp.cp_cdb[3] = 0;
 552     cp.cp_cdb[4] = 254;
 553     cp.cp_cdb[5] = 0;
 554     
 555     if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP)) 
 556         return (NULL);
 557     while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 558     outsw(base + HA_RDATA, &cp, cplen);
 559     outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 560     for (z = 0; z < cppadlen; z++) outw(0, base + HA_RDATA);
 561     
 562     while (inb(base + HA_RSTATUS) & HA_SBUSY);
 563     if (inb(base + HA_RSTATUS) & HA_SERROR)
 564         return (NULL);
 565     else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 566         return (NULL);
 567     else
 568     {
 569         insw(base+HA_RDATA, &buff, 127);
 570         while (inb(base + HA_RSTATUS)&HA_SDRQ) inw(base + HA_RDATA);
 571         return (buff);
 572     }
 573 }
 574 
 575 int get_pio_conf_PIO(u32 base, struct get_conf *buf)
     /*  */
 576 {
 577     ulong loop = R_LIMIT;
 578     int z;
 579     ushort *p;
 580     
 581     if(check_region(base, 9))  
 582         return (FALSE);
 583     
 584     memset(buf, 0, sizeof(struct get_conf));
 585     
 586     while (inb(base + HA_RSTATUS) & HA_SBUSY)
 587         if (--loop == 0) 
 588             return (FALSE);
 589     
 590     DBG(DBG_PIO && DBG_PROBE,
 591         printk("Issuing PIO READ CONFIG to HBA at %#x\n", base));
 592     eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 593 
 594     loop = R_LIMIT;
 595     for (p = (ushort *) buf; 
 596          (long)p <= ((long)buf + (sizeof(struct get_conf) / 2)); p++) {
 597         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 598             if (--loop == 0)
 599                 return (FALSE);
 600 
 601         loop = R_LIMIT;
 602         *p = inw(base + HA_RDATA);
 603     }
 604     if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {            /* Error ? */
 605         if (htonl(EATA_SIGNATURE) == buf->signature) {
 606             DBG(DBG_PIO&&DBG_PROBE, printk("EATA Controller found at %#4x "
 607                                            "EATA Level: %x\n", base, 
 608                                            (uint) (buf->version)));
 609             
 610             while (inb(base + HA_RSTATUS) & HA_SDRQ) 
 611                 inw(base + HA_RDATA);
 612             if(ALLOW_DMA_BOARDS == FALSE) {
 613                 for (z = 0; z < MAXISA; z++)
 614                     if (base == ISAbases[z]) {
 615                         buf->IRQ = ISAirqs[z]; 
 616                         break;
 617                     }
 618             }
 619             return (TRUE);
 620         } 
 621     } else {
 622         DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during transfer "
 623                               "for HBA at %x\n", base));
 624     }
 625     return (FALSE);
 626 }
 627 
 628 void print_pio_config(struct get_conf *gc)
     /*  */
 629 {
 630     printk("Please check values: (read config data)\n");
 631     printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n",
 632            (uint) ntohl(gc->len), gc->version,
 633            gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
 634     printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n",
 635            gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2],
 636            gc->scsi_id[1], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
 637     printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n",
 638            gc->IRQ, gc->IRQ_TR, gc->FORCADR, 
 639            gc->MAX_CHAN, gc->ID_qest);
 640     DBG(DPT_DEBUG, DELAY(14));
 641 }
 642 
 643 static uint print_selftest(uint base)
     /*  */
 644 {
 645     unchar buffer[512];
 646 #ifdef VERBOSE_SETUP
 647     int z;
 648 #endif
 649     
 650     printk("eata_pio: executing controller self test & setup...\n");
 651     while (inb(base + HA_RSTATUS) & HA_SBUSY);
 652     outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 653     do {
 654         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 655             /* nothing */ ;
 656         if (inb(base + HA_RSTATUS) & HA_SDRQ)
 657         {
 658             insw(base + HA_RDATA, &buffer, 256);
 659 #ifdef VERBOSE_SETUP
 660             /* no beeps please... */
 661             for (z = 0; z < 511 && buffer[z]; z++)
 662                 if (buffer[z] != 7) printk("%c", buffer[z]);
 663 #endif
 664         }
 665     } while (inb(base+HA_RSTATUS) & (HA_SBUSY|HA_SDRQ));
 666     
 667     return (!(inb(base+HA_RSTATUS) & HA_SERROR)); 
 668 }
 669 
 670 int register_pio_HBA(long base, struct get_conf *gc, Scsi_Host_Template * tpnt)
     /*  */
 671 {
 672     ulong size = 0;
 673     char *buff;
 674     ulong cplen;
 675     ushort cppadlen;
 676     struct Scsi_Host *sh;
 677     hostdata *hd;
 678     
 679     DBG(DBG_REGISTER, print_pio_config(gc));
 680     
 681     if (gc->DMA_support == TRUE) {
 682         printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n",base);
 683         if(ALLOW_DMA_BOARDS == FALSE)
 684             return (FALSE);
 685     }
 686     
 687     if ((buff = get_pio_board_data((uint)base, gc->IRQ, gc->scsi_id[3], 
 688                                cplen   =(htonl(gc->cplen   )+1)/2, 
 689                                cppadlen=(htons(gc->cppadlen)+1)/2)) == NULL)
 690     {
 691         printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (ulong) base);
 692         return (FALSE);
 693     }
 694     
 695     if (print_selftest(base) == FALSE && ALLOW_DMA_BOARDS == FALSE)
 696     {
 697         printk("HBA at %#lx failed while performing self test & setup.\n", 
 698                (ulong) base);
 699         return (FALSE);
 700     }
 701     
 702     if (!reg_IRQ[gc->IRQ]) {    /* Interrupt already registered ? */
 703         if (!request_irq(gc->IRQ, eata_pio_int_handler, SA_INTERRUPT, 
 704                          "EATA-PIO")){
 705             reg_IRQ[gc->IRQ]++;
 706             if (!gc->IRQ_TR)
 707                 reg_IRQL[gc->IRQ] = TRUE;   /* IRQ is edge triggered */
 708         } else {
 709             printk("Couldn't allocate IRQ %d, Sorry.", gc->IRQ);
 710             return (FALSE);
 711         }
 712     } else {            /* More than one HBA on this IRQ */
 713         if (reg_IRQL[gc->IRQ] == TRUE) {
 714             printk("Can't support more than one HBA on this IRQ,\n"
 715                    "  if the IRQ is edge triggered. Sorry.\n");
 716             return (FALSE);
 717         } else
 718             reg_IRQ[gc->IRQ]++;
 719     }
 720     
 721     request_region(base, 8, "eata_pio");
 722     
 723     size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
 724     
 725     sh = scsi_register(tpnt, size);
 726     hd = SD(sh);                   
 727     
 728     memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
 729     memset(hd->reads, 0, sizeof(ulong) * 26); 
 730     
 731     strncpy(SD(sh)->vendor, &buff[8], 8);
 732     SD(sh)->vendor[8] = 0;
 733     strncpy(SD(sh)->name, &buff[16], 17);
 734     SD(sh)->name[17] = 0;
 735     SD(sh)->revision[0] = buff[32];
 736     SD(sh)->revision[1] = buff[33];
 737     SD(sh)->revision[2] = buff[34];
 738     SD(sh)->revision[3] = '.';
 739     SD(sh)->revision[4] = buff[35];
 740     SD(sh)->revision[5] = 0;
 741 
 742     switch (ntohl(gc->len)) {
 743     case 0x1c:
 744         SD(sh)->EATA_revision = 'a';
 745         break;
 746     case 0x1e:
 747         SD(sh)->EATA_revision = 'b';
 748         break;
 749     case 0x22:
 750         SD(sh)->EATA_revision = 'c';
 751         break;
 752     case 0x24:
 753         SD(sh)->EATA_revision = 'z';            
 754     default:
 755         SD(sh)->EATA_revision = '?';
 756     }
 757 
 758     if(ntohl(gc->len) >= 0x22) {
 759         if (gc->is_PCI == TRUE)
 760             hd->bustype = IS_PCI;
 761         else if (gc->is_EISA == TRUE)
 762             hd->bustype = IS_EISA;
 763         else
 764             hd->bustype = IS_ISA;
 765     } else {
 766         if (buff[21] == '4')
 767             hd->bustype = IS_PCI;
 768         else if (buff[21] == '2')
 769             hd->bustype = IS_EISA;
 770         else
 771             hd->bustype = IS_ISA;
 772     }
 773   
 774     SD(sh)->cplen=cplen;
 775     SD(sh)->cppadlen=cppadlen;
 776     SD(sh)->hostid=gc->scsi_id[3];
 777     SD(sh)->devflags=1<<gc->scsi_id[3];
 778     SD(sh)->moresupport=gc->MORE_support;
 779     sh->base = (char *) base;
 780     sh->io_port = (ushort) base;
 781     sh->n_io_port = 8;
 782     sh->irq = gc->IRQ;
 783     sh->dma_channel = 0xfe;  /* PIO */
 784     sh->this_id = gc->scsi_id[3];
 785     sh->can_queue = 1;
 786     sh->cmd_per_lun = 1;
 787     sh->sg_tablesize = SG_ALL;
 788     
 789     hd->channel = 0;
 790     
 791     sh->max_id = 8;
 792     sh->max_lun = 8;
 793 
 794     if (gc->SECOND)
 795         hd->primary = FALSE;
 796     else
 797         hd->primary = TRUE;
 798     
 799     sh->unchecked_isa_dma = FALSE; /* We can only do PIO */
 800     
 801     hd->next = NULL;    /* build a linked list of all HBAs */
 802     hd->prev = last_HBA;
 803     if(hd->prev != NULL)
 804         SD(hd->prev)->next = sh;
 805     last_HBA = sh;
 806     if (first_HBA == NULL)
 807         first_HBA = sh;
 808     registered_HBAs++;
 809     return (1);
 810 }
 811 
 812 void find_pio_ISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
 813 {
 814     int i;
 815     
 816     for (i = 0; i < MAXISA; i++) {  
 817         if (ISAbases[i]) {  
 818             if (get_pio_conf_PIO(ISAbases[i], buf) == TRUE){
 819                 register_pio_HBA(ISAbases[i], buf, tpnt);
 820             }
 821             ISAbases[i] = 0;
 822         }
 823     }
 824     return;
 825 }
 826 
 827 void find_pio_EISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
 828 {
 829     u32 base;
 830     int i;
 831 
 832 #if CHECKPAL
 833     u8 pal1, pal2, pal3;
 834 #endif
 835 
 836     for (i = 0; i < MAXEISA; i++) {
 837         if (EISAbases[i] == TRUE) { /* Still a possibility ?          */
 838 
 839             base = 0x1c88 + (i * 0x1000);
 840 #if CHECKPAL
 841             pal1 = inb((u16)base - 8);
 842             pal2 = inb((u16)base - 7);
 843             pal3 = inb((u16)base - 6);
 844 
 845             if (((pal1 == 0x12) && (pal2 == 0x14)) ||
 846                 ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) ||
 847                 ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 848                 DBG(DBG_PROBE, printk("EISA EATA id tags found: %x %x %x \n",
 849                                       (int)pal1, (int)pal2, (int)pal3));
 850 #endif
 851                 if (get_pio_conf_PIO(base, buf) == TRUE) {
 852                     DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 853                     if (buf->IRQ) {
 854                         register_pio_HBA(base, buf, tpnt);
 855                     } else
 856                         printk("eata_dma: No valid IRQ. HBA removed from list\n");
 857                 }
 858                 /* Nothing found here so we take it from the list */
 859                 EISAbases[i] = 0;
 860 #if CHECKPAL
 861             }
 862 #endif
 863         }
 864     }
 865     return;
 866 }
 867 
 868 void find_pio_PCI(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
 869 {
 870 
 871 #ifndef CONFIG_PCI
 872     printk("eata_pio: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 873 #else
 874     
 875     u8 pci_bus, pci_device_fn;
 876     static s16 pci_index = 0;   /* Device index to PCI BIOS calls */
 877     u32 base = 0;
 878     u16 com_adr;
 879     u16 rev_device;
 880     u32 error, i, x;
 881 
 882     if (pcibios_present()) {
 883         for (i = 0; i <= MAXPCI; ++i, ++pci_index) {
 884             if (pcibios_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, 
 885                                     pci_index, &pci_bus, &pci_device_fn))
 886                 break;
 887             DBG(DBG_PROBE && DBG_PCI, 
 888                 printk("eata_pio: HBA at bus %d, device %d,"
 889                        " function %d, index %d\n", (s32)pci_bus, 
 890                        (s32)((pci_device_fn & 0xf8) >> 3),
 891                        (s32)(pci_device_fn & 7), pci_index));
 892             
 893             if (!(error = pcibios_read_config_word(pci_bus, pci_device_fn, 
 894                                        PCI_CLASS_DEVICE, &rev_device))) {
 895                 if (rev_device == PCI_CLASS_STORAGE_SCSI) {
 896                     if (!(error = pcibios_read_config_word(pci_bus, 
 897                                                pci_device_fn, PCI_COMMAND, 
 898                                                (u16 *) & com_adr))) {
 899                         if (!((com_adr & PCI_COMMAND_IO) && 
 900                               (com_adr & PCI_COMMAND_MASTER))) {
 901                             printk("HBA has IO or BUSMASTER mode disabled\n");
 902                             continue;
 903                         }
 904                     } else
 905                         printk("eata_pio: error %x while reading "
 906                                "PCI_COMMAND\n", error);
 907                 } else
 908                     printk("DEVICECLASSID %x didn't match\n", rev_device);
 909             } else {
 910                 printk("eata_pio: error %x while reading PCI_CLASS_BASE\n", 
 911                        error);
 912                 continue;
 913             }
 914             
 915             if (!(error = pcibios_read_config_dword(pci_bus, pci_device_fn,
 916                                        PCI_BASE_ADDRESS_0, (int *) &base))){
 917                 
 918                 /* Check if the address is valid */
 919                 if (base & 0x01) {
 920                     base &= 0xfffffffe;
 921                     /* EISA tag there ? */
 922                     if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 923                         continue;   /* Jep, it's forced, so move on  */
 924                     base += 0x10;   /* Now, THIS is the real address */
 925                     if (base != 0x1f8) {
 926                         /* We didn't find it in the primary search */
 927                         if (get_pio_conf_PIO(base, buf) == TRUE) {
 928                             if (buf->FORCADR)   /* If the address is forced */
 929                                 continue;       /* we'll find it later      */
 930                             
 931                             /* OK. We made it till here, so we can go now  
 932                              * and register it. We  only have to check and 
 933                              * eventually remove it from the EISA and ISA list 
 934                              */
 935                             
 936                             register_pio_HBA(base, buf, tpnt);
 937                             
 938                             if (base < 0x1000) {
 939                                 for (x = 0; x < MAXISA; ++x) {
 940                                     if (ISAbases[x] == base) {
 941                                         ISAbases[x] = 0;
 942                                         break;
 943                                     }
 944                                 }
 945                             } else if ((base & 0x0fff) == 0x0c88) {
 946                                 x = (base >> 12) & 0x0f;
 947                                 EISAbases[x] = 0;
 948                             }
 949                             continue;  /* break; */
 950                         }
 951                     }
 952                 }
 953             } else
 954                 printk("eata_pio: error %x while reading "
 955                        "PCI_BASE_ADDRESS_0\n", error);
 956         }
 957     } else
 958         printk("eata_pio: No BIOS32 extensions present. This driver release "
 959                "still depends on it.\n"
 960                "          Skipping scan for PCI HBAs.\n");
 961 #endif /* #ifndef CONFIG_PCI */
 962     return;
 963 }
 964 
 965 
 966 int eata_pio_detect(Scsi_Host_Template * tpnt)
     /*  */
 967 {
 968     struct Scsi_Host *HBA_ptr;
 969     struct get_conf gc;
 970     int i;
 971     
 972     DBG((DBG_PROBE && DBG_DELAY) || DPT_DEBUG,
 973         printk("Using lots of delays to let you read the debugging output\n"));
 974     
 975 
 976     find_pio_PCI(&gc, tpnt);
 977 
 978     find_pio_EISA(&gc, tpnt);
 979 
 980     find_pio_ISA(&gc, tpnt);
 981     
 982     for (i = 0; i <= MAXIRQ; i++)
 983         if (reg_IRQ[i])
 984             request_irq(i, eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO");
 985     
 986     HBA_ptr = first_HBA;
 987   
 988     if (registered_HBAs != 0) {
 989         printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 990                "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n"
 991                "            Alfred Arnold,   a.arnold@kfa-juelich.de\n"
 992                "This release only supports DASD devices (harddisks)\n",
 993                VER_MAJOR, VER_MINOR, VER_SUB);
 994         
 995         printk("Registered HBAs:\n");
 996         printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:"
 997                " QS: SG: CPL:\n");
 998         for (i = 1; i <= registered_HBAs; i++) {
 999             printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4x   %2d   %d   %d   %c"
1000                    "  %2d  %2d  %2d\n", 
1001                    HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
1002                    SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P')?
1003                    "PCI ":(SD(HBA_ptr)->bustype == 'E')?"EISA":"ISA ",
1004                    (uint) HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, 
1005                    HBA_ptr->this_id, (SD(HBA_ptr)->primary == TRUE)?'Y':'N', 
1006                    HBA_ptr->can_queue, HBA_ptr->sg_tablesize, 
1007                    HBA_ptr->cmd_per_lun);
1008             HBA_ptr = SD(HBA_ptr)->next;
1009         }
1010     }
1011     DBG(DPT_DEBUG,DELAY(12));
1012     
1013     return (registered_HBAs);
1014 }
1015 
1016 #ifdef MODULE
1017 /* Eventually this will go into an include file, but this will be later */
1018 Scsi_Host_Template driver_template = EATA_PIO;
1019 
1020 #include "scsi_module.c"
1021 #endif
1022 
1023 /*
1024  * Overrides for Emacs so that we almost follow Linus's tabbing style.
1025  * Emacs will notice this stuff at the end of the file and automatically
1026  * adjust the settings for this buffer only.  This must remain at the end
1027  * of the file.
1028  * ---------------------------------------------------------------------------
1029  * Local variables:
1030  * c-indent-level: 4
1031  * c-brace-imaginary-offset: 0
1032  * c-brace-offset: -4
1033  * c-argdecl-indent: 4
1034  * c-label-offset: -4
1035  * c-continued-statement-offset: 4
1036  * c-continued-brace-offset: 0
1037  * indent-tabs-mode: nil
1038  * tab-width: 8
1039  * End:
1040  */
/* */
root/drivers/scsi/eata_pio.c

DEFINITIONS
