drivers/scsi/eata_pio.c

   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)1993-96 Michael Neuffer, Alfred Arnold               *
  14  *             neuffer@goofy.zdv.uni-mainz.de               *
  15  *             a.arnold@kfa-juelich.de                      *
  16  *                                                          *
  17  *  Updated 2002 by Alan Cox <alan@redhat.com> for Linux    *
  18  *  2.5.x and the newer locking and error handling          *
  19  *                                                          *
  20  *  This program is free software; you can redistribute it  *
  21  *  and/or modify it under the terms of the GNU General     *
  22  *  Public License as published by the Free Software        *
  23  *  Foundation; either version 2 of the License, or         *
  24  *  (at your option) any later version.                     *
  25  *                                                          *
  26  *  This program is distributed in the hope that it will be *
  27  *  useful, but WITHOUT ANY WARRANTY; without even the      *
  28  *  implied warranty of MERCHANTABILITY or FITNESS FOR A    *
  29  *  PARTICULAR PURPOSE.  See the GNU General Public License *
  30  *  for more details.                                       *
  31  *                                                          *
  32  *  You should have received a copy of the GNU General      *
  33  *  Public License along with this kernel; if not, write to *
  34  *  the Free Software Foundation, Inc., 675 Mass Ave,       *
  35  *  Cambridge, MA 02139, USA.                               *
  36  *                                                          *
  37  *  For the avoidance of doubt the "preferred form" of this *
  38  *  code is one which is in an open non patent encumbered   *
  39  *  format. Where cryptographic key signing forms part of   *
  40  *  the process of creating an executable the information   *
  41  *  including keys needed to generate an equivalently       *
  42  *  functional executable are deemed to be part of the      *
  43  *  source code are deemed to be part of the source code.   *
  44  *                                                          *
  45  ************************************************************
  46  *  last change: 2002/11/02               OS: Linux 2.5.45  *
  47  ************************************************************/
  48
  49 #include <linux/module.h>
  50 #include <linux/kernel.h>
  51 #include <linux/string.h>
  52 #include <linux/ioport.h>
  53 #include <linux/slab.h>
  54 #include <linux/in.h>
  55 #include <linux/pci.h>
  56 #include <linux/proc_fs.h>
  57 #include <linux/interrupt.h>
  58 #include <linux/blkdev.h>
  59 #include <linux/spinlock.h>
  60 #include <linux/delay.h>
  61
  62 #include <asm/io.h>
  63
  64 #include <scsi/scsi.h>
  65 #include <scsi/scsi_cmnd.h>
  66 #include <scsi/scsi_device.h>
  67 #include <scsi/scsi_host.h>
  68
  69 #include "eata_generic.h"
  70 #include "eata_pio.h"
  71
  72
  73 static unsigned int ISAbases[MAXISA] =  {
  74          0x1F0, 0x170, 0x330, 0x230
  75 };
  76
  77 static unsigned int ISAirqs[MAXISA] = {
  78         14, 12, 15, 11
  79 };
  80
  81 static unsigned char EISAbases[] = {
  82         1, 1, 1, 1, 1, 1, 1, 1,
  83         1, 1, 1, 1, 1, 1, 1, 1
  84 };
  85
  86 static unsigned int registered_HBAs;
  87 static struct Scsi_Host *last_HBA;
  88 static struct Scsi_Host *first_HBA;
  89 static unsigned char reg_IRQ[16];
  90 static unsigned char reg_IRQL[16];
  91 static unsigned long int_counter;
  92 static unsigned long queue_counter;
  93
  94 static struct scsi_host_template driver_template;
  95
  96 /*
  97  * eata_proc_info
  98  * inout : decides on the direction of the dataflow and the meaning of the
  99  *         variables
 100  * buffer: If inout==FALSE data is being written to it else read from it
 101  * *start: If inout==FALSE start of the valid data in the buffer
 102  * offset: If inout==FALSE offset from the beginning of the imaginary file
 103  *         from which we start writing into the buffer
 104  * length: If inout==FALSE max number of bytes to be written into the buffer
 105  *         else number of bytes in the buffer
 106  */
 107 static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
 108                               int length, int rw)
 109 {
 110     static u8 buff[512];
 111     int size, len = 0;
 112     off_t begin = 0, pos = 0;
 113
 114     if (rw)
 115         return -ENOSYS;
 116     if (offset == 0)
 117         memset(buff, 0, sizeof(buff));
 118
 119     size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
 120                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
 121     len += size; pos = begin + len;
 122     size = sprintf(buffer + len, "queued commands:     %10ld\n"
 123                    "processed interrupts:%10ld\n", queue_counter, int_counter);
 124     len += size; pos = begin + len;
 125
 126     size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
 127                    shost->host_no, SD(shost)->name);
 128     len += size;
 129     pos = begin + len;
 130     size = sprintf(buffer + len, "Firmware revision: v%s\n",
 131                    SD(shost)->revision);
 132     len += size;
 133     pos = begin + len;
 134     size = sprintf(buffer + len, "IO: PIO\n");
 135     len += size;
 136     pos = begin + len;
 137     size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
 138     len += size;
 139     pos = begin + len;
 140     size = sprintf(buffer + len, "Host Bus: %s\n",
 141                    (SD(shost)->bustype == 'P')?"PCI ":
 142                    (SD(shost)->bustype == 'E')?"EISA":"ISA ");
 143
 144     len += size;
 145     pos = begin + len;
 146
 147     if (pos < offset) {
 148         len = 0;
 149         begin = pos;
 150     }
 151     if (pos > offset + length)
 152         goto stop_output;
 153
 154  stop_output:
 155     DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
 156     *start=buffer+(offset-begin);   /* Start of wanted data */
 157     len-=(offset-begin);            /* Start slop */
 158     if(len>length)
 159         len = length;               /* Ending slop */
 160     DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
 161
 162     return (len);
 163 }
 164
 165 static int eata_pio_release(struct Scsi_Host *sh)
 166 {
 167         hostdata *hd = SD(sh);
 168         if (sh->irq && reg_IRQ[sh->irq] == 1)
 169                 free_irq(sh->irq, NULL);
 170         else
 171                 reg_IRQ[sh->irq]--;
 172         if (SD(sh)->channel == 0) {
 173                 if (sh->io_port && sh->n_io_port)
 174                         release_region(sh->io_port, sh->n_io_port);
 175         }
 176         /* At this point the PCI reference can go */
 177         if (hd->pdev)
 178                 pci_dev_put(hd->pdev);
 179         return 1;
 180 }
 181
 182 static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
 183 {
 184         SCp->ptr += Increment;
 185         if ((SCp->this_residual -= Increment) == 0) {
 186                 if ((--SCp->buffers_residual) == 0)
 187                         SCp->Status = 0;
 188                 else {
 189                         SCp->buffer++;
 190                         SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
 191                         SCp->this_residual = SCp->buffer->length;
 192                 }
 193         }
 194 }
 195
 196 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
 197
 198 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
 199 {
 200         unsigned long flags;
 201         struct Scsi_Host *dev = dev_id;
 202         irqreturn_t ret;
 203
 204         spin_lock_irqsave(dev->host_lock, flags);
 205         ret = eata_pio_int_handler(irq, dev_id);
 206         spin_unlock_irqrestore(dev->host_lock, flags);
 207         return ret;
 208 }
 209
 210 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
 211 {
 212         unsigned int eata_stat = 0xfffff;
 213         struct scsi_cmnd *cmd;
 214         hostdata *hd;
 215         struct eata_ccb *cp;
 216         unsigned long base;
 217         unsigned int x, z;
 218         struct Scsi_Host *sh;
 219         unsigned short zwickel = 0;
 220         unsigned char stat, odd;
 221         irqreturn_t ret = IRQ_NONE;
 222
 223         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
 224         {
 225                 if (sh->irq != irq)
 226                         continue;
 227                 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
 228                         continue;
 229
 230                 int_counter++;
 231                 ret = IRQ_HANDLED;
 232
 233                 hd = SD(sh);
 234
 235                 cp = &hd->ccb[0];
 236                 cmd = cp->cmd;
 237                 base = cmd->device->host->base;
 238
 239                 do {
 240                         stat = inb(base + HA_RSTATUS);
 241                         if (stat & HA_SDRQ) {
 242                                 if (cp->DataIn) {
 243                                         z = 256;
 244                                         odd = 0;
 245                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 246                                                 if (odd) {
 247                                                         *(cmd->SCp.ptr) = zwickel >> 8;
 248                                                         IncStat(&cmd->SCp, 1);
 249                                                         odd = 0;
 250                                                 }
 251                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 252                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
 253                                                 z -= x;
 254                                                 IncStat(&cmd->SCp, 2 * x);
 255                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 256                                                         zwickel = inw(base + HA_RDATA);
 257                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
 258                                                         IncStat(&cmd->SCp, 1);
 259                                                         z--;
 260                                                         odd = 1;
 261                                                 }
 262                                         }
 263                                         while (z > 0) {
 264                                                 zwickel = inw(base + HA_RDATA);
 265                                                 z--;
 266                                         }
 267                                 } else {        /* cp->DataOut */
 268
 269                                         odd = 0;
 270                                         z = 256;
 271                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 272                                                 if (odd) {
 273                                                         zwickel += *(cmd->SCp.ptr) << 8;
 274                                                         IncStat(&cmd->SCp, 1);
 275                                                         outw(zwickel, base + HA_RDATA);
 276                                                         z--;
 277                                                         odd = 0;
 278                                                 }
 279                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 280                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 281                                                 z -= x;
 282                                                 IncStat(&cmd->SCp, 2 * x);
 283                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 284                                                         zwickel = *(cmd->SCp.ptr);
 285                                                         zwickel &= 0xff;
 286                                                         IncStat(&cmd->SCp, 1);
 287                                                         odd = 1;
 288                                                 }
 289                                         }
 290                                         while (z > 0 || odd) {
 291                                                 outw(zwickel, base + HA_RDATA);
 292                                                 z--;
 293                                                 odd = 0;
 294                                         }
 295                                 }
 296                         }
 297                 }
 298                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 299
 300                 /* terminate handler if HBA goes busy again, i.e. transfers
 301                  * more data */
 302
 303                 if (stat & HA_SBUSY)
 304                         break;
 305
 306                 /* OK, this is quite stupid, but I haven't found any correct
 307                  * way to get HBA&SCSI status so far */
 308
 309                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 310                         cmd->result = (DID_OK << 16);
 311                         hd->devflags |= (1 << cp->cp_id);
 312                 } else if (hd->devflags & (1 << cp->cp_id))
 313                         cmd->result = (DID_OK << 16) + 0x02;
 314                 else
 315                         cmd->result = (DID_NO_CONNECT << 16);
 316
 317                 if (cp->status == LOCKED) {
 318                         cp->status = FREE;
 319                         eata_stat = inb(base + HA_RSTATUS);
 320                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 321                         return ret;
 322                 }
 323 #if DBG_INTR2
 324                 if (stat != 0x50)
 325                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 326 #endif
 327
 328                 cp->status = FREE;      /* now we can release the slot  */
 329
 330                 cmd->scsi_done(cmd);
 331         }
 332
 333         return ret;
 334 }
 335
 336 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
 337 {
 338         unsigned int loop = 50;
 339
 340         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 341                 if (--loop == 0)
 342                         return 1;
 343
 344         /* Enable interrupts for HBA.  It is not the best way to do it at this
 345          * place, but I hope that it doesn't interfere with the IDE driver
 346          * initialization this way */
 347
 348         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 349
 350         outb(command, base + HA_WCOMMAND);
 351         return 0;
 352 }
 353
 354 static int eata_pio_queue(struct scsi_cmnd *cmd,
 355                 void (*done)(struct scsi_cmnd *))
 356 {
 357         unsigned int x, y;
 358         unsigned long base;
 359
 360         hostdata *hd;
 361         struct Scsi_Host *sh;
 362         struct eata_ccb *cp;
 363
 364         queue_counter++;
 365
 366         hd = HD(cmd);
 367         sh = cmd->device->host;
 368         base = sh->base;
 369
 370         /* use only slot 0, as 2001 can handle only one cmd at a time */
 371
 372         y = x = 0;
 373
 374         if (hd->ccb[y].status != FREE) {
 375
 376                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 377 #if DEBUG_EATA
 378                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 379 #else
 380                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 381 #endif
 382         }
 383
 384         cp = &hd->ccb[y];
 385
 386         memset(cp, 0, sizeof(struct eata_ccb));
 387         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 388
 389         cp->status = USED;      /* claim free slot */
 390
 391         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 392                 "eata_pio_queue pid %ld, y %d\n",
 393                 cmd->pid, y));
 394
 395         cmd->scsi_done = (void *) done;
 396
 397         if (cmd->sc_data_direction == DMA_TO_DEVICE)
 398                 cp->DataOut = 1;        /* Output mode */
 399         else
 400                 cp->DataIn = 0; /* Input mode  */
 401
 402         cp->Interpret = (cmd->device->id == hd->hostid);
 403         cp->cp_datalen = cpu_to_be32(cmd->request_bufflen);
 404         cp->Auto_Req_Sen = 0;
 405         cp->cp_reqDMA = 0;
 406         cp->reqlen = 0;
 407
 408         cp->cp_id = cmd->device->id;
 409         cp->cp_lun = cmd->device->lun;
 410         cp->cp_dispri = 0;
 411         cp->cp_identify = 1;
 412         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 413
 414         cp->cp_statDMA = 0;
 415
 416         cp->cp_viraddr = cp;
 417         cp->cmd = cmd;
 418         cmd->host_scribble = (char *) &hd->ccb[y];
 419
 420         if (cmd->use_sg == 0) {
 421                 cmd->SCp.buffers_residual = 1;
 422                 cmd->SCp.ptr = cmd->request_buffer;
 423                 cmd->SCp.this_residual = cmd->request_bufflen;
 424                 cmd->SCp.buffer = NULL;
 425         } else {
 426                 cmd->SCp.buffer = cmd->request_buffer;
 427                 cmd->SCp.buffers_residual = cmd->use_sg;
 428                 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
 429                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
 430         }
 431         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes
 432                                                                  * are to transfer */
 433
 434         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 435                 cmd->result = DID_BUS_BUSY << 16;
 436                 scmd_printk(KERN_NOTICE, cmd,
 437                         "eata_pio_queue pid %ld, HBA busy, "
 438                         "returning DID_BUS_BUSY, done.\n", cmd->pid);
 439                 done(cmd);
 440                 cp->status = FREE;
 441                 return (0);
 442         }
 443         /* FIXME: timeout */
 444         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 445                 cpu_relax();
 446         outsw(base + HA_RDATA, cp, hd->cplen);
 447         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 448         for (x = 0; x < hd->cppadlen; x++)
 449                 outw(0, base + HA_RDATA);
 450
 451         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 452                 "Queued base %#.4lx pid: %ld "
 453                 "slot %d irq %d\n", sh->base, cmd->pid, y, sh->irq));
 454
 455         return (0);
 456 }
 457
 458 static int eata_pio_abort(struct scsi_cmnd *cmd)
 459 {
 460         unsigned int loop = 100;
 461
 462         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 463                 "eata_pio_abort called pid: %ld\n",
 464                 cmd->pid));
 465
 466         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 467                 if (--loop == 0) {
 468                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 469                         return FAILED;
 470                 }
 471         if (CD(cmd)->status == FREE) {
 472                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 473                 return FAILED;
 474         }
 475         if (CD(cmd)->status == USED) {
 476                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 477                 /* We want to sleep a bit more here */
 478                 return FAILED;          /* SNOOZE */
 479         }
 480         if (CD(cmd)->status == RESET) {
 481                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 482                 return FAILED;
 483         }
 484         if (CD(cmd)->status == LOCKED) {
 485                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 486                 return FAILED;
 487         }
 488         panic("eata_pio: abort: invalid slot status\n");
 489 }
 490
 491 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 492 {
 493         unsigned int x, limit = 0;
 494         unsigned char success = 0;
 495         struct scsi_cmnd *sp;
 496         struct Scsi_Host *host = cmd->device->host;
 497
 498         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 499                 "eata_pio_reset called pid:%ld\n",
 500                 cmd->pid));
 501
 502         spin_lock_irq(host->host_lock);
 503
 504         if (HD(cmd)->state == RESET) {
 505                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 506                 spin_unlock_irq(host->host_lock);
 507                 return FAILED;
 508         }
 509
 510         /* force all slots to be free */
 511
 512         for (x = 0; x < cmd->device->host->can_queue; x++) {
 513
 514                 if (HD(cmd)->ccb[x].status == FREE)
 515                         continue;
 516
 517                 sp = HD(cmd)->ccb[x].cmd;
 518                 HD(cmd)->ccb[x].status = RESET;
 519                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 520
 521                 if (sp == NULL)
 522                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 523         }
 524
 525         /* hard reset the HBA  */
 526         outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
 527
 528         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 529         HD(cmd)->state = RESET;
 530
 531         spin_unlock_irq(host->host_lock);
 532         msleep(3000);
 533         spin_lock_irq(host->host_lock);
 534
 535         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 536
 537         for (x = 0; x < cmd->device->host->can_queue; x++) {
 538
 539                 /* Skip slots already set free by interrupt */
 540                 if (HD(cmd)->ccb[x].status != RESET)
 541                         continue;
 542
 543                 sp = HD(cmd)->ccb[x].cmd;
 544                 sp->result = DID_RESET << 16;
 545
 546                 /* This mailbox is terminated */
 547                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 548                 HD(cmd)->ccb[x].status = FREE;
 549
 550                 sp->scsi_done(sp);
 551         }
 552
 553         HD(cmd)->state = 0;
 554
 555         spin_unlock_irq(host->host_lock);
 556
 557         if (success) {          /* hmmm... */
 558                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 559                 return SUCCESS;
 560         } else {
 561                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 562                 return FAILED;
 563         }
 564 }
 565
 566 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
 567 {
 568         struct eata_ccb cp;
 569         static char buff[256];
 570         int z;
 571
 572         memset(&cp, 0, sizeof(struct eata_ccb));
 573         memset(buff, 0, sizeof(buff));
 574
 575         cp.DataIn = 1;
 576         cp.Interpret = 1;       /* Interpret command */
 577
 578         cp.cp_datalen = cpu_to_be32(254);
 579         cp.cp_dataDMA = cpu_to_be32(0);
 580
 581         cp.cp_id = id;
 582         cp.cp_lun = 0;
 583
 584         cp.cp_cdb[0] = INQUIRY;
 585         cp.cp_cdb[1] = 0;
 586         cp.cp_cdb[2] = 0;
 587         cp.cp_cdb[3] = 0;
 588         cp.cp_cdb[4] = 254;
 589         cp.cp_cdb[5] = 0;
 590
 591         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
 592                 return (NULL);
 593         while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 594         outsw(base + HA_RDATA, &cp, cplen);
 595         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 596         for (z = 0; z < cppadlen; z++)
 597                 outw(0, base + HA_RDATA);
 598
 599         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 600         if (inb(base + HA_RSTATUS) & HA_SERROR)
 601                 return (NULL);
 602         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 603                 return (NULL);
 604         else {
 605                 insw(base + HA_RDATA, &buff, 127);
 606                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
 607                         inw(base + HA_RDATA);
 608                 return (buff);
 609         }
 610 }
 611
 612 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
 613 {
 614         unsigned long loop = HZ / 2;
 615         int z;
 616         unsigned short *p;
 617
 618         if (!request_region(base, 9, "eata_pio"))
 619                 return 0;
 620
 621         memset(buf, 0, sizeof(struct get_conf));
 622
 623         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 624                 if (--loop == 0)
 625                         goto fail;
 626
 627         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
 628         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 629
 630         loop = 50;
 631         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 632                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 633                         if (--loop == 0)
 634                                 goto fail;
 635
 636                 loop = 50;
 637                 *p = inw(base + HA_RDATA);
 638         }
 639         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 640                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 641                                         "transfer for HBA at %lx\n", base));
 642                 goto fail;
 643         }
 644
 645         if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
 646                 goto fail;
 647
 648         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 649                                 "at %#4lx EATA Level: %x\n",
 650                                 base, (unsigned int) (buf->version)));
 651
 652         while (inb(base + HA_RSTATUS) & HA_SDRQ)
 653                 inw(base + HA_RDATA);
 654
 655         if (!ALLOW_DMA_BOARDS) {
 656                 for (z = 0; z < MAXISA; z++)
 657                         if (base == ISAbases[z]) {
 658                                 buf->IRQ = ISAirqs[z];
 659                                 break;
 660                         }
 661         }
 662
 663         return 1;
 664
 665  fail:
 666         release_region(base, 9);
 667         return 0;
 668 }
 669
 670 static void print_pio_config(struct get_conf *gc)
 671 {
 672         printk("Please check values: (read config data)\n");
 673         printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", be32_to_cpu(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
 674         printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n", gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2], gc->scsi_id[1], be16_to_cpu(gc->queuesiz), be16_to_cpu(gc->SGsiz), gc->SECOND);
 675         printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n", gc->IRQ, gc->IRQ_TR, gc->FORCADR, gc->MAX_CHAN, gc->ID_qest);
 676 }
 677
 678 static unsigned int print_selftest(unsigned int base)
 679 {
 680         unsigned char buffer[512];
 681 #ifdef VERBOSE_SETUP
 682         int z;
 683 #endif
 684
 685         printk("eata_pio: executing controller self test & setup...\n");
 686         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 687         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 688         do {
 689                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
 690                         /* nothing */ ;
 691                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 692                         insw(base + HA_RDATA, &buffer, 256);
 693 #ifdef VERBOSE_SETUP
 694                         /* no beeps please... */
 695                         for (z = 0; z < 511 && buffer[z]; z++)
 696                                 if (buffer[z] != 7)
 697                                         printk("%c", buffer[z]);
 698 #endif
 699                 }
 700         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 701
 702         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 703 }
 704
 705 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
 706 {
 707         unsigned long size = 0;
 708         char *buff;
 709         unsigned long cplen;
 710         unsigned short cppadlen;
 711         struct Scsi_Host *sh;
 712         hostdata *hd;
 713
 714         DBG(DBG_REGISTER, print_pio_config(gc));
 715
 716         if (gc->DMA_support) {
 717                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 718                 if (!ALLOW_DMA_BOARDS)
 719                         return 0;
 720         }
 721
 722         if ((buff = get_pio_board_data(base, gc->IRQ, gc->scsi_id[3], cplen = (cpu_to_be32(gc->cplen) + 1) / 2, cppadlen = (cpu_to_be16(gc->cppadlen) + 1) / 2)) == NULL) {
 723                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
 724                 return 0;
 725         }
 726
 727         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 728                 printk("HBA at %#lx failed while performing self test & setup.\n", base);
 729                 return 0;
 730         }
 731
 732         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
 733
 734         sh = scsi_register(&driver_template, size);
 735         if (sh == NULL)
 736                 return 0;
 737
 738         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 739                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
 740                         reg_IRQ[gc->IRQ]++;
 741                         if (!gc->IRQ_TR)
 742                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 743                 } else {
 744                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 745                         return 0;
 746                 }
 747         } else {                /* More than one HBA on this IRQ */
 748                 if (reg_IRQL[gc->IRQ]) {
 749                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 750                         return 0;
 751                 } else
 752                         reg_IRQ[gc->IRQ]++;
 753         }
 754
 755         hd = SD(sh);
 756
 757         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
 758         memset(hd->reads, 0, sizeof(hd->reads));
 759
 760         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 761         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 762         SD(sh)->revision[0] = buff[32];
 763         SD(sh)->revision[1] = buff[33];
 764         SD(sh)->revision[2] = buff[34];
 765         SD(sh)->revision[3] = '.';
 766         SD(sh)->revision[4] = buff[35];
 767         SD(sh)->revision[5] = 0;
 768
 769         switch (be32_to_cpu(gc->len)) {
 770         case 0x1c:
 771                 SD(sh)->EATA_revision = 'a';
 772                 break;
 773         case 0x1e:
 774                 SD(sh)->EATA_revision = 'b';
 775                 break;
 776         case 0x22:
 777                 SD(sh)->EATA_revision = 'c';
 778                 break;
 779         case 0x24:
 780                 SD(sh)->EATA_revision = 'z';
 781         default:
 782                 SD(sh)->EATA_revision = '?';
 783         }
 784
 785         if (be32_to_cpu(gc->len) >= 0x22) {
 786                 if (gc->is_PCI)
 787                         hd->bustype = IS_PCI;
 788                 else if (gc->is_EISA)
 789                         hd->bustype = IS_EISA;
 790                 else
 791                         hd->bustype = IS_ISA;
 792         } else {
 793                 if (buff[21] == '4')
 794                         hd->bustype = IS_PCI;
 795                 else if (buff[21] == '2')
 796                         hd->bustype = IS_EISA;
 797                 else
 798                         hd->bustype = IS_ISA;
 799         }
 800
 801         SD(sh)->cplen = cplen;
 802         SD(sh)->cppadlen = cppadlen;
 803         SD(sh)->hostid = gc->scsi_id[3];
 804         SD(sh)->devflags = 1 << gc->scsi_id[3];
 805         SD(sh)->moresupport = gc->MORE_support;
 806         sh->unique_id = base;
 807         sh->base = base;
 808         sh->io_port = base;
 809         sh->n_io_port = 9;
 810         sh->irq = gc->IRQ;
 811         sh->dma_channel = PIO;
 812         sh->this_id = gc->scsi_id[3];
 813         sh->can_queue = 1;
 814         sh->cmd_per_lun = 1;
 815         sh->sg_tablesize = SG_ALL;
 816
 817         hd->channel = 0;
 818
 819         hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
 820
 821         sh->max_id = 8;
 822         sh->max_lun = 8;
 823
 824         if (gc->SECOND)
 825                 hd->primary = 0;
 826         else
 827                 hd->primary = 1;
 828
 829         sh->unchecked_isa_dma = 0;      /* We can only do PIO */
 830
 831         hd->next = NULL;        /* build a linked list of all HBAs */
 832         hd->prev = last_HBA;
 833         if (hd->prev != NULL)
 834                 SD(hd->prev)->next = sh;
 835         last_HBA = sh;
 836         if (first_HBA == NULL)
 837                 first_HBA = sh;
 838         registered_HBAs++;
 839         return (1);
 840 }
 841
 842 static void find_pio_ISA(struct get_conf *buf)
 843 {
 844         int i;
 845
 846         for (i = 0; i < MAXISA; i++) {
 847                 if (!ISAbases[i])
 848                         continue;
 849                 if (!get_pio_conf_PIO(ISAbases[i], buf))
 850                         continue;
 851                 if (!register_pio_HBA(ISAbases[i], buf, NULL))
 852                         release_region(ISAbases[i], 9);
 853                 else
 854                         ISAbases[i] = 0;
 855         }
 856         return;
 857 }
 858
 859 static void find_pio_EISA(struct get_conf *buf)
 860 {
 861         u32 base;
 862         int i;
 863
 864 #ifdef CHECKPAL
 865         u8 pal1, pal2, pal3;
 866 #endif
 867
 868         for (i = 0; i < MAXEISA; i++) {
 869                 if (EISAbases[i]) {     /* Still a possibility ?          */
 870
 871                         base = 0x1c88 + (i * 0x1000);
 872 #ifdef CHECKPAL
 873                         pal1 = inb((u16) base - 8);
 874                         pal2 = inb((u16) base - 7);
 875                         pal3 = inb((u16) base - 6);
 876
 877                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 878                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 879 #endif
 880                                 if (get_pio_conf_PIO(base, buf)) {
 881                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 882                                         if (buf->IRQ) {
 883                                                 if (!register_pio_HBA(base, buf, NULL))
 884                                                         release_region(base, 9);
 885                                         } else {
 886                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 887                                                 release_region(base, 9);
 888                                         }
 889                                 }
 890                                 /* Nothing found here so we take it from the list */
 891                                 EISAbases[i] = 0;
 892 #ifdef CHECKPAL
 893                         }
 894 #endif
 895                 }
 896         }
 897         return;
 898 }
 899
 900 static void find_pio_PCI(struct get_conf *buf)
 901 {
 902 #ifndef CONFIG_PCI
 903         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 904 #else
 905         struct pci_dev *dev = NULL;
 906         unsigned long base, x;
 907
 908         while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 909                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 910                 if (pci_enable_device(dev))
 911                         continue;
 912                 pci_set_master(dev);
 913                 base = pci_resource_flags(dev, 0);
 914                 if (base & IORESOURCE_MEM) {
 915                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 916                         continue;
 917                 }
 918                 base = pci_resource_start(dev, 0);
 919                 /* EISA tag there ? */
 920                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 921                         continue;       /* Jep, it's forced, so move on  */
 922                 base += 0x10;   /* Now, THIS is the real address */
 923                 if (base != 0x1f8) {
 924                         /* We didn't find it in the primary search */
 925                         if (get_pio_conf_PIO(base, buf)) {
 926                                 if (buf->FORCADR) {     /* If the address is forced */
 927                                         release_region(base, 9);
 928                                         continue;       /* we'll find it later      */
 929                                 }
 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                                 if (!register_pio_HBA(base, buf, dev)) {
 937                                         release_region(base, 9);
 938                                         continue;
 939                                 }
 940
 941                                 if (base < 0x1000) {
 942                                         for (x = 0; x < MAXISA; ++x) {
 943                                                 if (ISAbases[x] == base) {
 944                                                         ISAbases[x] = 0;
 945                                                         break;
 946                                                 }
 947                                         }
 948                                 } else if ((base & 0x0fff) == 0x0c88) {
 949                                         x = (base >> 12) & 0x0f;
 950                                         EISAbases[x] = 0;
 951                                 }
 952                         }
 953 #ifdef CHECK_BLINK
 954                         else if (check_blink_state(base)) {
 955                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 956                         }
 957 #endif
 958                 }
 959         }
 960 #endif                          /* #ifndef CONFIG_PCI */
 961 }
 962
 963 static int eata_pio_detect(struct scsi_host_template *tpnt)
 964 {
 965         struct Scsi_Host *HBA_ptr;
 966         struct get_conf gc;
 967         int i;
 968
 969         find_pio_PCI(&gc);
 970         find_pio_EISA(&gc);
 971         find_pio_ISA(&gc);
 972
 973         for (i = 0; i <= MAXIRQ; i++)
 974                 if (reg_IRQ[i])
 975                         request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
 976
 977         HBA_ptr = first_HBA;
 978
 979         if (registered_HBAs != 0) {
 980                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 981                        "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n" "            Alfred Arnold,   a.arnold@kfa-juelich.de\n" "This release only supports DASD devices (harddisks)\n", VER_MAJOR, VER_MINOR, VER_SUB);
 982
 983                 printk("Registered HBAs:\n");
 984                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 985                 for (i = 1; i <= registered_HBAs; i++) {
 986                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
 987                                "  %2d  %2d  %2d\n",
 988                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 989                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 990                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 991                                HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 992                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 993                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 994                         HBA_ptr = SD(HBA_ptr)->next;
 995                 }
 996         }
 997         return (registered_HBAs);
 998 }
 999
1000 static struct scsi_host_template driver_template = {
1001         .proc_name              = "eata_pio",
1002         .name                   = "EATA (Extended Attachment) PIO driver",
1003         .proc_info              = eata_pio_proc_info,
1004         .detect                 = eata_pio_detect,
1005         .release                = eata_pio_release,
1006         .queuecommand           = eata_pio_queue,
1007         .eh_abort_handler       = eata_pio_abort,
1008         .eh_host_reset_handler  = eata_pio_host_reset,
1009         .use_clustering         = ENABLE_CLUSTERING,
1010 };
1011
1012 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1013 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1014 MODULE_LICENSE("GPL");
1015
1016 #include "scsi_module.c"