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/config.h>
  50 #include <linux/module.h>
  51 #include <linux/kernel.h>
  52 #include <linux/sched.h>
  53 #include <linux/string.h>
  54 #include <linux/ioport.h>
  55 #include <linux/slab.h>
  56 #include <linux/in.h>
  57 #include <linux/pci.h>
  58 #include <linux/proc_fs.h>
  59 #include <linux/interrupt.h>
  60 #include <linux/blkdev.h>
  61 #include <linux/spinlock.h>
  62 #include <linux/delay.h>
  63
  64 #include <asm/io.h>
  65
  66 #include <scsi/scsi.h>
  67 #include <scsi/scsi_cmnd.h>
  68 #include <scsi/scsi_device.h>
  69 #include <scsi/scsi_host.h>
  70
  71 #include "eata_generic.h"
  72 #include "eata_pio.h"
  73
  74
  75 static uint ISAbases[MAXISA] =  {
  76          0x1F0, 0x170, 0x330, 0x230
  77 };
  78
  79 static uint ISAirqs[MAXISA] = {
  80         14, 12, 15, 11
  81 };
  82
  83 static unsigned char EISAbases[] = {
  84         1, 1, 1, 1, 1, 1, 1, 1,
  85         1, 1, 1, 1, 1, 1, 1, 1
  86 };
  87
  88 static uint registered_HBAs;
  89 static struct Scsi_Host *last_HBA;
  90 static struct Scsi_Host *first_HBA;
  91 static unsigned char reg_IRQ[16];
  92 static unsigned char reg_IRQL[16];
  93 static unsigned long int_counter;
  94 static unsigned long queue_counter;
  95
  96 static struct scsi_host_template driver_template;
  97
  98 /*
  99  * eata_proc_info
 100  * inout : decides on the direction of the dataflow and the meaning of the
 101  *         variables
 102  * buffer: If inout==FALSE data is being written to it else read from it
 103  * *start: If inout==FALSE start of the valid data in the buffer
 104  * offset: If inout==FALSE offset from the beginning of the imaginary file
 105  *         from which we start writing into the buffer
 106  * length: If inout==FALSE max number of bytes to be written into the buffer
 107  *         else number of bytes in the buffer
 108  */
 109 static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
 110                               int length, int rw)
 111 {
 112     static u8 buff[512];
 113     int size, len = 0;
 114     off_t begin = 0, pos = 0;
 115
 116     if (rw)
 117         return -ENOSYS;
 118     if (offset == 0)
 119         memset(buff, 0, sizeof(buff));
 120
 121     size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
 122                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
 123     len += size; pos = begin + len;
 124     size = sprintf(buffer + len, "queued commands:     %10ld\n"
 125                    "processed interrupts:%10ld\n", queue_counter, int_counter);
 126     len += size; pos = begin + len;
 127
 128     size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
 129                    shost->host_no, SD(shost)->name);
 130     len += size;
 131     pos = begin + len;
 132     size = sprintf(buffer + len, "Firmware revision: v%s\n",
 133                    SD(shost)->revision);
 134     len += size;
 135     pos = begin + len;
 136     size = sprintf(buffer + len, "IO: PIO\n");
 137     len += size;
 138     pos = begin + len;
 139     size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
 140     len += size;
 141     pos = begin + len;
 142     size = sprintf(buffer + len, "Host Bus: %s\n",
 143                    (SD(shost)->bustype == 'P')?"PCI ":
 144                    (SD(shost)->bustype == 'E')?"EISA":"ISA ");
 145
 146     len += size;
 147     pos = begin + len;
 148
 149     if (pos < offset) {
 150         len = 0;
 151         begin = pos;
 152     }
 153     if (pos > offset + length)
 154         goto stop_output;
 155
 156  stop_output:
 157     DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
 158     *start=buffer+(offset-begin);   /* Start of wanted data */
 159     len-=(offset-begin);            /* Start slop */
 160     if(len>length)
 161         len = length;               /* Ending slop */
 162     DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
 163
 164     return (len);
 165 }
 166
 167 static int eata_pio_release(struct Scsi_Host *sh)
 168 {
 169         if (sh->irq && reg_IRQ[sh->irq] == 1)
 170                 free_irq(sh->irq, NULL);
 171         else
 172                 reg_IRQ[sh->irq]--;
 173         if (SD(sh)->channel == 0) {
 174                 if (sh->io_port && sh->n_io_port)
 175                         release_region(sh->io_port, sh->n_io_port);
 176         }
 177         return 1;
 178 }
 179
 180 static void IncStat(struct scsi_pointer *SCp, uint Increment)
 181 {
 182         SCp->ptr += Increment;
 183         if ((SCp->this_residual -= Increment) == 0) {
 184                 if ((--SCp->buffers_residual) == 0)
 185                         SCp->Status = 0;
 186                 else {
 187                         SCp->buffer++;
 188                         SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
 189                         SCp->this_residual = SCp->buffer->length;
 190                 }
 191         }
 192 }
 193
 194 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs);
 195
 196 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id,
 197                                                 struct pt_regs *regs)
 198 {
 199         unsigned long flags;
 200         struct Scsi_Host *dev = dev_id;
 201
 202         spin_lock_irqsave(dev->host_lock, flags);
 203         eata_pio_int_handler(irq, dev_id, regs);
 204         spin_unlock_irqrestore(dev->host_lock, flags);
 205         return IRQ_HANDLED;
 206 }
 207
 208 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs)
 209 {
 210         uint eata_stat = 0xfffff;
 211         struct scsi_cmnd *cmd;
 212         hostdata *hd;
 213         struct eata_ccb *cp;
 214         uint base;
 215         uint x, z;
 216         struct Scsi_Host *sh;
 217         unsigned short zwickel = 0;
 218         unsigned char stat, odd;
 219
 220         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
 221         {
 222                 if (sh->irq != irq)
 223                         continue;
 224                 if (inb((uint) sh->base + HA_RSTATUS) & HA_SBUSY)
 225                         continue;
 226
 227                 int_counter++;
 228
 229                 hd = SD(sh);
 230
 231                 cp = &hd->ccb[0];
 232                 cmd = cp->cmd;
 233                 base = (uint) cmd->device->host->base;
 234
 235                 do {
 236                         stat = inb(base + HA_RSTATUS);
 237                         if (stat & HA_SDRQ) {
 238                                 if (cp->DataIn) {
 239                                         z = 256;
 240                                         odd = 0;
 241                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 242                                                 if (odd) {
 243                                                         *(cmd->SCp.ptr) = zwickel >> 8;
 244                                                         IncStat(&cmd->SCp, 1);
 245                                                         odd = 0;
 246                                                 }
 247                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 248                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
 249                                                 z -= x;
 250                                                 IncStat(&cmd->SCp, 2 * x);
 251                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 252                                                         zwickel = inw(base + HA_RDATA);
 253                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
 254                                                         IncStat(&cmd->SCp, 1);
 255                                                         z--;
 256                                                         odd = 1;
 257                                                 }
 258                                         }
 259                                         while (z > 0) {
 260                                                 zwickel = inw(base + HA_RDATA);
 261                                                 z--;
 262                                         }
 263                                 } else {        /* cp->DataOut */
 264
 265                                         odd = 0;
 266                                         z = 256;
 267                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 268                                                 if (odd) {
 269                                                         zwickel += *(cmd->SCp.ptr) << 8;
 270                                                         IncStat(&cmd->SCp, 1);
 271                                                         outw(zwickel, base + HA_RDATA);
 272                                                         z--;
 273                                                         odd = 0;
 274                                                 }
 275                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 276                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 277                                                 z -= x;
 278                                                 IncStat(&cmd->SCp, 2 * x);
 279                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 280                                                         zwickel = *(cmd->SCp.ptr);
 281                                                         zwickel &= 0xff;
 282                                                         IncStat(&cmd->SCp, 1);
 283                                                         odd = 1;
 284                                                 }
 285                                         }
 286                                         while (z > 0 || odd) {
 287                                                 outw(zwickel, base + HA_RDATA);
 288                                                 z--;
 289                                                 odd = 0;
 290                                         }
 291                                 }
 292                         }
 293                 }
 294                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 295
 296                 /* terminate handler if HBA goes busy again, i.e. transfers
 297                  * more data */
 298
 299                 if (stat & HA_SBUSY)
 300                         break;
 301
 302                 /* OK, this is quite stupid, but I haven't found any correct
 303                  * way to get HBA&SCSI status so far */
 304
 305                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 306                         cmd->result = (DID_OK << 16);
 307                         hd->devflags |= (1 << cp->cp_id);
 308                 } else if (hd->devflags & 1 << cp->cp_id)
 309                         cmd->result = (DID_OK << 16) + 0x02;
 310                 else
 311                         cmd->result = (DID_NO_CONNECT << 16);
 312
 313                 if (cp->status == LOCKED) {
 314                         cp->status = FREE;
 315                         eata_stat = inb(base + HA_RSTATUS);
 316                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 317                         return;
 318                 }
 319 #if DBG_INTR2
 320                 if (stat != 0x50)
 321                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 322 #endif
 323
 324                 cp->status = FREE;      /* now we can release the slot  */
 325
 326                 cmd->scsi_done(cmd);
 327         }
 328
 329         return;
 330 }
 331
 332 static inline uint eata_pio_send_command(uint base, unsigned char command)
 333 {
 334         uint loop = HZ / 2;
 335
 336         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 337                 if (--loop == 0)
 338                         return 1;
 339
 340         /* Enable interrupts for HBA.  It is not the best way to do it at this
 341          * place, but I hope that it doesn't interfere with the IDE driver
 342          * initialization this way */
 343
 344         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 345
 346         outb(command, base + HA_WCOMMAND);
 347         return 0;
 348 }
 349
 350 static int eata_pio_queue(struct scsi_cmnd *cmd,
 351                 void (*done)(struct scsi_cmnd *))
 352 {
 353         uint x, y;
 354         uint base;
 355
 356         hostdata *hd;
 357         struct Scsi_Host *sh;
 358         struct eata_ccb *cp;
 359
 360         queue_counter++;
 361
 362         hd = HD(cmd);
 363         sh = cmd->device->host;
 364         base = (uint) sh->base;
 365
 366         /* use only slot 0, as 2001 can handle only one cmd at a time */
 367
 368         y = x = 0;
 369
 370         if (hd->ccb[y].status != FREE) {
 371
 372                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 373 #if DEBUG_EATA
 374                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 375 #else
 376                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 377 #endif
 378         }
 379
 380         cp = &hd->ccb[y];
 381
 382         memset(cp, 0, sizeof(struct eata_ccb));
 383         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 384
 385         cp->status = USED;      /* claim free slot */
 386
 387         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 388                 "eata_pio_queue pid %ld, y %d\n",
 389                 cmd->pid, y));
 390
 391         cmd->scsi_done = (void *) done;
 392
 393         if (cmd->sc_data_direction == DMA_TO_DEVICE)
 394                 cp->DataOut = 1;        /* Output mode */
 395         else
 396                 cp->DataIn = 0; /* Input mode  */
 397
 398         cp->Interpret = (cmd->device->id == hd->hostid);
 399         cp->cp_datalen = htonl((unsigned long) cmd->request_bufflen);
 400         cp->Auto_Req_Sen = 0;
 401         cp->cp_reqDMA = htonl(0);
 402         cp->reqlen = 0;
 403
 404         cp->cp_id = cmd->device->id;
 405         cp->cp_lun = cmd->device->lun;
 406         cp->cp_dispri = 0;
 407         cp->cp_identify = 1;
 408         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 409
 410         cp->cp_statDMA = htonl(0);
 411
 412         cp->cp_viraddr = cp;
 413         cp->cmd = cmd;
 414         cmd->host_scribble = (char *) &hd->ccb[y];
 415
 416         if (cmd->use_sg == 0) {
 417                 cmd->SCp.buffers_residual = 1;
 418                 cmd->SCp.ptr = cmd->request_buffer;
 419                 cmd->SCp.this_residual = cmd->request_bufflen;
 420                 cmd->SCp.buffer = NULL;
 421         } else {
 422                 cmd->SCp.buffer = cmd->request_buffer;
 423                 cmd->SCp.buffers_residual = cmd->use_sg;
 424                 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
 425                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
 426         }
 427         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes
 428                                                                  * are to transfer */
 429
 430         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 431                 cmd->result = DID_BUS_BUSY << 16;
 432                 scmd_printk(KERN_NOTICE, cmd,
 433                         "eata_pio_queue pid %ld, HBA busy, "
 434                         "returning DID_BUS_BUSY, done.\n", cmd->pid);
 435                 done(cmd);
 436                 cp->status = FREE;
 437                 return (0);
 438         }
 439         /* FIXME: timeout */
 440         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 441                 cpu_relax();
 442         outsw(base + HA_RDATA, cp, hd->cplen);
 443         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 444         for (x = 0; x < hd->cppadlen; x++)
 445                 outw(0, base + HA_RDATA);
 446
 447         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 448                 "Queued base %#.4lx pid: %ld "
 449                 "slot %d irq %d\n", (long) sh->base, cmd->pid, y, sh->irq));
 450
 451         return (0);
 452 }
 453
 454 static int eata_pio_abort(struct scsi_cmnd *cmd)
 455 {
 456         uint loop = HZ;
 457
 458         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 459                 "eata_pio_abort called pid: %ld\n",
 460                 cmd->pid));
 461
 462         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 463                 if (--loop == 0) {
 464                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 465                         return FAILED;
 466                 }
 467         if (CD(cmd)->status == FREE) {
 468                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 469                 return FAILED;
 470         }
 471         if (CD(cmd)->status == USED) {
 472                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 473                 /* We want to sleep a bit more here */
 474                 return FAILED;          /* SNOOZE */
 475         }
 476         if (CD(cmd)->status == RESET) {
 477                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 478                 return FAILED;
 479         }
 480         if (CD(cmd)->status == LOCKED) {
 481                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 482                 return FAILED;
 483         }
 484         panic("eata_pio: abort: invalid slot status\n");
 485 }
 486
 487 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 488 {
 489         uint x, limit = 0;
 490         unsigned char success = 0;
 491         struct scsi_cmnd *sp;
 492         struct Scsi_Host *host = cmd->device->host;
 493
 494         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 495                 "eata_pio_reset called pid:%ld\n",
 496                 cmd->pid));
 497
 498         spin_lock_irq(host->host_lock);
 499
 500         if (HD(cmd)->state == RESET) {
 501                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 502                 spin_unlock_irq(host->host_lock);
 503                 return FAILED;
 504         }
 505
 506         /* force all slots to be free */
 507
 508         for (x = 0; x < cmd->device->host->can_queue; x++) {
 509
 510                 if (HD(cmd)->ccb[x].status == FREE)
 511                         continue;
 512
 513                 sp = HD(cmd)->ccb[x].cmd;
 514                 HD(cmd)->ccb[x].status = RESET;
 515                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 516
 517                 if (sp == NULL)
 518                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 519         }
 520
 521         /* hard reset the HBA  */
 522         outb(EATA_CMD_RESET, (uint) cmd->device->host->base + HA_WCOMMAND);
 523
 524         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 525         HD(cmd)->state = RESET;
 526
 527         spin_unlock_irq(host->host_lock);
 528         msleep(3000);
 529         spin_lock_irq(host->host_lock);
 530
 531         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 532
 533         for (x = 0; x < cmd->device->host->can_queue; x++) {
 534
 535                 /* Skip slots already set free by interrupt */
 536                 if (HD(cmd)->ccb[x].status != RESET)
 537                         continue;
 538
 539                 sp = HD(cmd)->ccb[x].cmd;
 540                 sp->result = DID_RESET << 16;
 541
 542                 /* This mailbox is terminated */
 543                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 544                 HD(cmd)->ccb[x].status = FREE;
 545
 546                 sp->scsi_done(sp);
 547         }
 548
 549         HD(cmd)->state = 0;
 550
 551         spin_unlock_irq(host->host_lock);
 552
 553         if (success) {          /* hmmm... */
 554                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 555                 return SUCCESS;
 556         } else {
 557                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 558                 return FAILED;
 559         }
 560 }
 561
 562 static char *get_pio_board_data(unsigned long base, uint irq, uint id, unsigned long cplen, unsigned short cppadlen)
 563 {
 564         struct eata_ccb cp;
 565         static char buff[256];
 566         int z;
 567
 568         memset(&cp, 0, sizeof(struct eata_ccb));
 569         memset(buff, 0, sizeof(buff));
 570
 571         cp.DataIn = 1;
 572         cp.Interpret = 1;       /* Interpret command */
 573
 574         cp.cp_datalen = htonl(254);
 575         cp.cp_dataDMA = htonl(0);
 576
 577         cp.cp_id = id;
 578         cp.cp_lun = 0;
 579
 580         cp.cp_cdb[0] = INQUIRY;
 581         cp.cp_cdb[1] = 0;
 582         cp.cp_cdb[2] = 0;
 583         cp.cp_cdb[3] = 0;
 584         cp.cp_cdb[4] = 254;
 585         cp.cp_cdb[5] = 0;
 586
 587         if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP))
 588                 return (NULL);
 589         while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 590         outsw(base + HA_RDATA, &cp, cplen);
 591         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 592         for (z = 0; z < cppadlen; z++)
 593                 outw(0, base + HA_RDATA);
 594
 595         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 596         if (inb(base + HA_RSTATUS) & HA_SERROR)
 597                 return (NULL);
 598         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 599                 return (NULL);
 600         else {
 601                 insw(base + HA_RDATA, &buff, 127);
 602                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
 603                         inw(base + HA_RDATA);
 604                 return (buff);
 605         }
 606 }
 607
 608 static int get_pio_conf_PIO(u32 base, struct get_conf *buf)
 609 {
 610         unsigned long loop = HZ / 2;
 611         int z;
 612         unsigned short *p;
 613
 614         if (!request_region(base, 9, "eata_pio"))
 615                 return 0;
 616
 617         memset(buf, 0, sizeof(struct get_conf));
 618
 619         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 620                 if (--loop == 0)
 621                         goto fail;
 622
 623         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#x\n", base));
 624         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 625
 626         loop = HZ / 2;
 627         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 628                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 629                         if (--loop == 0)
 630                                 goto fail;
 631
 632                 loop = HZ / 2;
 633                 *p = inw(base + HA_RDATA);
 634         }
 635         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 636                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 637                                         "transfer for HBA at %x\n", base));
 638                 goto fail;
 639         }
 640
 641         if (htonl(EATA_SIGNATURE) != buf->signature)
 642                 goto fail;
 643
 644         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 645                                 "at %#4x EATA Level: %x\n",
 646                                 base, (uint) (buf->version)));
 647
 648         while (inb(base + HA_RSTATUS) & HA_SDRQ)
 649                 inw(base + HA_RDATA);
 650
 651         if (!ALLOW_DMA_BOARDS) {
 652                 for (z = 0; z < MAXISA; z++)
 653                         if (base == ISAbases[z]) {
 654                                 buf->IRQ = ISAirqs[z];
 655                                 break;
 656                         }
 657         }
 658
 659         return 1;
 660
 661  fail:
 662         release_region(base, 9);
 663         return 0;
 664 }
 665
 666 static void print_pio_config(struct get_conf *gc)
 667 {
 668         printk("Please check values: (read config data)\n");
 669         printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", (uint) ntohl(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
 670         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], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
 671         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);
 672 }
 673
 674 static uint print_selftest(uint base)
 675 {
 676         unsigned char buffer[512];
 677 #ifdef VERBOSE_SETUP
 678         int z;
 679 #endif
 680
 681         printk("eata_pio: executing controller self test & setup...\n");
 682         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 683         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 684         do {
 685                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
 686                         /* nothing */ ;
 687                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 688                         insw(base + HA_RDATA, &buffer, 256);
 689 #ifdef VERBOSE_SETUP
 690                         /* no beeps please... */
 691                         for (z = 0; z < 511 && buffer[z]; z++)
 692                                 if (buffer[z] != 7)
 693                                         printk("%c", buffer[z]);
 694 #endif
 695                 }
 696         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 697
 698         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 699 }
 700
 701 static int register_pio_HBA(long base, struct get_conf *gc)
 702 {
 703         unsigned long size = 0;
 704         char *buff;
 705         unsigned long cplen;
 706         unsigned short cppadlen;
 707         struct Scsi_Host *sh;
 708         hostdata *hd;
 709
 710         DBG(DBG_REGISTER, print_pio_config(gc));
 711
 712         if (gc->DMA_support) {
 713                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 714                 if (!ALLOW_DMA_BOARDS)
 715                         return 0;
 716         }
 717
 718         if ((buff = get_pio_board_data((uint) base, gc->IRQ, gc->scsi_id[3], cplen = (htonl(gc->cplen) + 1) / 2, cppadlen = (htons(gc->cppadlen) + 1) / 2)) == NULL) {
 719                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (unsigned long) base);
 720                 return 0;
 721         }
 722
 723         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 724                 printk("HBA at %#lx failed while performing self test & setup.\n", (unsigned long) base);
 725                 return 0;
 726         }
 727
 728         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
 729
 730         sh = scsi_register(&driver_template, size);
 731         if (sh == NULL)
 732                 return 0;
 733
 734         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 735                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", sh)) {
 736                         reg_IRQ[gc->IRQ]++;
 737                         if (!gc->IRQ_TR)
 738                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 739                 } else {
 740                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 741                         return 0;
 742                 }
 743         } else {                /* More than one HBA on this IRQ */
 744                 if (reg_IRQL[gc->IRQ]) {
 745                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 746                         return 0;
 747                 } else
 748                         reg_IRQ[gc->IRQ]++;
 749         }
 750
 751         hd = SD(sh);
 752
 753         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
 754         memset(hd->reads, 0, sizeof(unsigned long) * 26);
 755
 756         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 757         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 758         SD(sh)->revision[0] = buff[32];
 759         SD(sh)->revision[1] = buff[33];
 760         SD(sh)->revision[2] = buff[34];
 761         SD(sh)->revision[3] = '.';
 762         SD(sh)->revision[4] = buff[35];
 763         SD(sh)->revision[5] = 0;
 764
 765         switch (ntohl(gc->len)) {
 766         case 0x1c:
 767                 SD(sh)->EATA_revision = 'a';
 768                 break;
 769         case 0x1e:
 770                 SD(sh)->EATA_revision = 'b';
 771                 break;
 772         case 0x22:
 773                 SD(sh)->EATA_revision = 'c';
 774                 break;
 775         case 0x24:
 776                 SD(sh)->EATA_revision = 'z';
 777         default:
 778                 SD(sh)->EATA_revision = '?';
 779         }
 780
 781         if (ntohl(gc->len) >= 0x22) {
 782                 if (gc->is_PCI)
 783                         hd->bustype = IS_PCI;
 784                 else if (gc->is_EISA)
 785                         hd->bustype = IS_EISA;
 786                 else
 787                         hd->bustype = IS_ISA;
 788         } else {
 789                 if (buff[21] == '4')
 790                         hd->bustype = IS_PCI;
 791                 else if (buff[21] == '2')
 792                         hd->bustype = IS_EISA;
 793                 else
 794                         hd->bustype = IS_ISA;
 795         }
 796
 797         SD(sh)->cplen = cplen;
 798         SD(sh)->cppadlen = cppadlen;
 799         SD(sh)->hostid = gc->scsi_id[3];
 800         SD(sh)->devflags = 1 << gc->scsi_id[3];
 801         SD(sh)->moresupport = gc->MORE_support;
 802         sh->unique_id = base;
 803         sh->base = base;
 804         sh->io_port = base;
 805         sh->n_io_port = 9;
 806         sh->irq = gc->IRQ;
 807         sh->dma_channel = PIO;
 808         sh->this_id = gc->scsi_id[3];
 809         sh->can_queue = 1;
 810         sh->cmd_per_lun = 1;
 811         sh->sg_tablesize = SG_ALL;
 812
 813         hd->channel = 0;
 814
 815         sh->max_id = 8;
 816         sh->max_lun = 8;
 817
 818         if (gc->SECOND)
 819                 hd->primary = 0;
 820         else
 821                 hd->primary = 1;
 822
 823         sh->unchecked_isa_dma = 0;      /* We can only do PIO */
 824
 825         hd->next = NULL;        /* build a linked list of all HBAs */
 826         hd->prev = last_HBA;
 827         if (hd->prev != NULL)
 828                 SD(hd->prev)->next = sh;
 829         last_HBA = sh;
 830         if (first_HBA == NULL)
 831                 first_HBA = sh;
 832         registered_HBAs++;
 833         return (1);
 834 }
 835
 836 static void find_pio_ISA(struct get_conf *buf)
 837 {
 838         int i;
 839
 840         for (i = 0; i < MAXISA; i++) {
 841                 if (!ISAbases[i])
 842                         continue;
 843                 if (!get_pio_conf_PIO(ISAbases[i], buf))
 844                         continue;
 845                 if (!register_pio_HBA(ISAbases[i], buf))
 846                         release_region(ISAbases[i], 9);
 847                 else
 848                         ISAbases[i] = 0;
 849         }
 850         return;
 851 }
 852
 853 static void find_pio_EISA(struct get_conf *buf)
 854 {
 855         u32 base;
 856         int i;
 857
 858 #ifdef CHECKPAL
 859         u8 pal1, pal2, pal3;
 860 #endif
 861
 862         for (i = 0; i < MAXEISA; i++) {
 863                 if (EISAbases[i]) {     /* Still a possibility ?          */
 864
 865                         base = 0x1c88 + (i * 0x1000);
 866 #ifdef CHECKPAL
 867                         pal1 = inb((u16) base - 8);
 868                         pal2 = inb((u16) base - 7);
 869                         pal3 = inb((u16) base - 6);
 870
 871                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 872                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 873 #endif
 874                                 if (get_pio_conf_PIO(base, buf)) {
 875                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 876                                         if (buf->IRQ) {
 877                                                 if (!register_pio_HBA(base, buf))
 878                                                         release_region(base, 9);
 879                                         } else {
 880                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 881                                                 release_region(base, 9);
 882                                         }
 883                                 }
 884                                 /* Nothing found here so we take it from the list */
 885                                 EISAbases[i] = 0;
 886 #ifdef CHECKPAL
 887                         }
 888 #endif
 889                 }
 890         }
 891         return;
 892 }
 893
 894 static void find_pio_PCI(struct get_conf *buf)
 895 {
 896 #ifndef CONFIG_PCI
 897         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 898 #else
 899         struct pci_dev *dev = NULL;
 900         u32 base, x;
 901
 902         while ((dev = pci_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 903                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 904                 if (pci_enable_device(dev))
 905                         continue;
 906                 pci_set_master(dev);
 907                 base = pci_resource_flags(dev, 0);
 908                 if (base & IORESOURCE_MEM) {
 909                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 910                         continue;
 911                 }
 912                 base = pci_resource_start(dev, 0);
 913                 /* EISA tag there ? */
 914                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 915                         continue;       /* Jep, it's forced, so move on  */
 916                 base += 0x10;   /* Now, THIS is the real address */
 917                 if (base != 0x1f8) {
 918                         /* We didn't find it in the primary search */
 919                         if (get_pio_conf_PIO(base, buf)) {
 920                                 if (buf->FORCADR) {     /* If the address is forced */
 921                                         release_region(base, 9);
 922                                         continue;       /* we'll find it later      */
 923                                 }
 924
 925                                 /* OK. We made it till here, so we can go now
 926                                  * and register it. We  only have to check and
 927                                  * eventually remove it from the EISA and ISA list
 928                                  */
 929
 930                                 if (!register_pio_HBA(base, buf)) {
 931                                         release_region(base, 9);
 932                                         continue;
 933                                 }
 934
 935                                 if (base < 0x1000) {
 936                                         for (x = 0; x < MAXISA; ++x) {
 937                                                 if (ISAbases[x] == base) {
 938                                                         ISAbases[x] = 0;
 939                                                         break;
 940                                                 }
 941                                         }
 942                                 } else if ((base & 0x0fff) == 0x0c88) {
 943                                         x = (base >> 12) & 0x0f;
 944                                         EISAbases[x] = 0;
 945                                 }
 946                         }
 947 #ifdef CHECK_BLINK
 948                         else if (check_blink_state(base)) {
 949                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 950                         }
 951 #endif
 952                 }
 953         }
 954 #endif                          /* #ifndef CONFIG_PCI */
 955 }
 956
 957 static int eata_pio_detect(struct scsi_host_template *tpnt)
 958 {
 959         struct Scsi_Host *HBA_ptr;
 960         struct get_conf gc;
 961         int i;
 962
 963         find_pio_PCI(&gc);
 964         find_pio_EISA(&gc);
 965         find_pio_ISA(&gc);
 966
 967         for (i = 0; i <= MAXIRQ; i++)
 968                 if (reg_IRQ[i])
 969                         request_irq(i, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", NULL);
 970
 971         HBA_ptr = first_HBA;
 972
 973         if (registered_HBAs != 0) {
 974                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 975                        "(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);
 976
 977                 printk("Registered HBAs:\n");
 978                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 979                 for (i = 1; i <= registered_HBAs; i++) {
 980                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4x   %2d   %d   %d   %c"
 981                                "  %2d  %2d  %2d\n",
 982                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 983                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 984                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 985                                (uint) HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 986                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 987                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 988                         HBA_ptr = SD(HBA_ptr)->next;
 989                 }
 990         }
 991         return (registered_HBAs);
 992 }
 993
 994 static struct scsi_host_template driver_template = {
 995         .proc_name              = "eata_pio",
 996         .name                   = "EATA (Extended Attachment) PIO driver",
 997         .proc_info              = eata_pio_proc_info,
 998         .detect                 = eata_pio_detect,
 999         .release                = eata_pio_release,
1000         .queuecommand           = eata_pio_queue,
1001         .eh_abort_handler       = eata_pio_abort,
1002         .eh_host_reset_handler  = eata_pio_host_reset,
1003         .use_clustering         = ENABLE_CLUSTERING,
1004 };
1005
1006 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1007 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1008 MODULE_LICENSE("GPL");
1009
1010 #include "scsi_module.c"