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@lxorguk.ukuu.org.uk> for *
  18  *   Linux 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/in.h>
  54 #include <linux/pci.h>
  55 #include <linux/proc_fs.h>
  56 #include <linux/interrupt.h>
  57 #include <linux/blkdev.h>
  58 #include <linux/spinlock.h>
  59 #include <linux/delay.h>
  60
  61 #include <asm/io.h>
  62
  63 #include <scsi/scsi.h>
  64 #include <scsi/scsi_cmnd.h>
  65 #include <scsi/scsi_device.h>
  66 #include <scsi/scsi_host.h>
  67
  68 #include "eata_generic.h"
  69 #include "eata_pio.h"
  70
  71
  72 static unsigned int ISAbases[MAXISA] =  {
  73          0x1F0, 0x170, 0x330, 0x230
  74 };
  75
  76 static unsigned int ISAirqs[MAXISA] = {
  77         14, 12, 15, 11
  78 };
  79
  80 static unsigned char EISAbases[] = {
  81         1, 1, 1, 1, 1, 1, 1, 1,
  82         1, 1, 1, 1, 1, 1, 1, 1
  83 };
  84
  85 static unsigned int registered_HBAs;
  86 static struct Scsi_Host *last_HBA;
  87 static struct Scsi_Host *first_HBA;
  88 static unsigned char reg_IRQ[16];
  89 static unsigned char reg_IRQL[16];
  90 static unsigned long int_counter;
  91 static unsigned long queue_counter;
  92
  93 static struct scsi_host_template driver_template;
  94
  95 /*
  96  * eata_proc_info
  97  * inout : decides on the direction of the dataflow and the meaning of the
  98  *         variables
  99  * buffer: If inout==FALSE data is being written to it else read from it
 100  * *start: If inout==FALSE start of the valid data in the buffer
 101  * offset: If inout==FALSE offset from the beginning of the imaginary file
 102  *         from which we start writing into the buffer
 103  * length: If inout==FALSE max number of bytes to be written into the buffer
 104  *         else number of bytes in the buffer
 105  */
 106 static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
 107                               int length, int rw)
 108 {
 109         int len = 0;
 110         off_t begin = 0, pos = 0;
 111
 112         if (rw)
 113                 return -ENOSYS;
 114
 115         len += sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
 116                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
 117         len += sprintf(buffer + len, "queued commands:     %10ld\n"
 118                    "processed interrupts:%10ld\n", queue_counter, int_counter);
 119         len += sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
 120                    shost->host_no, SD(shost)->name);
 121         len += sprintf(buffer + len, "Firmware revision: v%s\n",
 122                    SD(shost)->revision);
 123         len += sprintf(buffer + len, "IO: PIO\n");
 124         len += sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
 125         len += sprintf(buffer + len, "Host Bus: %s\n",
 126                    (SD(shost)->bustype == 'P')?"PCI ":
 127                    (SD(shost)->bustype == 'E')?"EISA":"ISA ");
 128
 129         pos = begin + len;
 130
 131         if (pos < offset) {
 132                 len = 0;
 133                 begin = pos;
 134         }
 135         if (pos > offset + length)
 136                 goto stop_output;
 137
 138 stop_output:
 139         DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
 140         *start = buffer + (offset - begin);   /* Start of wanted data */
 141         len -= (offset - begin);            /* Start slop */
 142         if (len > length)
 143                 len = length;               /* Ending slop */
 144         DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
 145
 146         return len;
 147 }
 148
 149 static int eata_pio_release(struct Scsi_Host *sh)
 150 {
 151         hostdata *hd = SD(sh);
 152         if (sh->irq && reg_IRQ[sh->irq] == 1)
 153                 free_irq(sh->irq, NULL);
 154         else
 155                 reg_IRQ[sh->irq]--;
 156         if (SD(sh)->channel == 0) {
 157                 if (sh->io_port && sh->n_io_port)
 158                         release_region(sh->io_port, sh->n_io_port);
 159         }
 160         /* At this point the PCI reference can go */
 161         if (hd->pdev)
 162                 pci_dev_put(hd->pdev);
 163         return 1;
 164 }
 165
 166 static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
 167 {
 168         SCp->ptr += Increment;
 169         if ((SCp->this_residual -= Increment) == 0) {
 170                 if ((--SCp->buffers_residual) == 0)
 171                         SCp->Status = 0;
 172                 else {
 173                         SCp->buffer++;
 174                         SCp->ptr = sg_virt(SCp->buffer);
 175                         SCp->this_residual = SCp->buffer->length;
 176                 }
 177         }
 178 }
 179
 180 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
 181
 182 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
 183 {
 184         unsigned long flags;
 185         struct Scsi_Host *dev = dev_id;
 186         irqreturn_t ret;
 187
 188         spin_lock_irqsave(dev->host_lock, flags);
 189         ret = eata_pio_int_handler(irq, dev_id);
 190         spin_unlock_irqrestore(dev->host_lock, flags);
 191         return ret;
 192 }
 193
 194 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
 195 {
 196         unsigned int eata_stat = 0xfffff;
 197         struct scsi_cmnd *cmd;
 198         hostdata *hd;
 199         struct eata_ccb *cp;
 200         unsigned long base;
 201         unsigned int x, z;
 202         struct Scsi_Host *sh;
 203         unsigned short zwickel = 0;
 204         unsigned char stat, odd;
 205         irqreturn_t ret = IRQ_NONE;
 206
 207         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
 208         {
 209                 if (sh->irq != irq)
 210                         continue;
 211                 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
 212                         continue;
 213
 214                 int_counter++;
 215                 ret = IRQ_HANDLED;
 216
 217                 hd = SD(sh);
 218
 219                 cp = &hd->ccb[0];
 220                 cmd = cp->cmd;
 221                 base = cmd->device->host->base;
 222
 223                 do {
 224                         stat = inb(base + HA_RSTATUS);
 225                         if (stat & HA_SDRQ) {
 226                                 if (cp->DataIn) {
 227                                         z = 256;
 228                                         odd = 0;
 229                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 230                                                 if (odd) {
 231                                                         *(cmd->SCp.ptr) = zwickel >> 8;
 232                                                         IncStat(&cmd->SCp, 1);
 233                                                         odd = 0;
 234                                                 }
 235                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 236                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
 237                                                 z -= x;
 238                                                 IncStat(&cmd->SCp, 2 * x);
 239                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 240                                                         zwickel = inw(base + HA_RDATA);
 241                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
 242                                                         IncStat(&cmd->SCp, 1);
 243                                                         z--;
 244                                                         odd = 1;
 245                                                 }
 246                                         }
 247                                         while (z > 0) {
 248                                                 zwickel = inw(base + HA_RDATA);
 249                                                 z--;
 250                                         }
 251                                 } else {        /* cp->DataOut */
 252
 253                                         odd = 0;
 254                                         z = 256;
 255                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 256                                                 if (odd) {
 257                                                         zwickel += *(cmd->SCp.ptr) << 8;
 258                                                         IncStat(&cmd->SCp, 1);
 259                                                         outw(zwickel, base + HA_RDATA);
 260                                                         z--;
 261                                                         odd = 0;
 262                                                 }
 263                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 264                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 265                                                 z -= x;
 266                                                 IncStat(&cmd->SCp, 2 * x);
 267                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 268                                                         zwickel = *(cmd->SCp.ptr);
 269                                                         zwickel &= 0xff;
 270                                                         IncStat(&cmd->SCp, 1);
 271                                                         odd = 1;
 272                                                 }
 273                                         }
 274                                         while (z > 0 || odd) {
 275                                                 outw(zwickel, base + HA_RDATA);
 276                                                 z--;
 277                                                 odd = 0;
 278                                         }
 279                                 }
 280                         }
 281                 }
 282                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 283
 284                 /* terminate handler if HBA goes busy again, i.e. transfers
 285                  * more data */
 286
 287                 if (stat & HA_SBUSY)
 288                         break;
 289
 290                 /* OK, this is quite stupid, but I haven't found any correct
 291                  * way to get HBA&SCSI status so far */
 292
 293                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 294                         cmd->result = (DID_OK << 16);
 295                         hd->devflags |= (1 << cp->cp_id);
 296                 } else if (hd->devflags & (1 << cp->cp_id))
 297                         cmd->result = (DID_OK << 16) + 0x02;
 298                 else
 299                         cmd->result = (DID_NO_CONNECT << 16);
 300
 301                 if (cp->status == LOCKED) {
 302                         cp->status = FREE;
 303                         eata_stat = inb(base + HA_RSTATUS);
 304                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 305                         return ret;
 306                 }
 307 #if DBG_INTR2
 308                 if (stat != 0x50)
 309                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 310 #endif
 311
 312                 cp->status = FREE;      /* now we can release the slot  */
 313
 314                 cmd->scsi_done(cmd);
 315         }
 316
 317         return ret;
 318 }
 319
 320 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
 321 {
 322         unsigned int loop = 50;
 323
 324         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 325                 if (--loop == 0)
 326                         return 1;
 327
 328         /* Enable interrupts for HBA.  It is not the best way to do it at this
 329          * place, but I hope that it doesn't interfere with the IDE driver
 330          * initialization this way */
 331
 332         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 333
 334         outb(command, base + HA_WCOMMAND);
 335         return 0;
 336 }
 337
 338 static int eata_pio_queue(struct scsi_cmnd *cmd,
 339                 void (*done)(struct scsi_cmnd *))
 340 {
 341         unsigned int x, y;
 342         unsigned long base;
 343
 344         hostdata *hd;
 345         struct Scsi_Host *sh;
 346         struct eata_ccb *cp;
 347
 348         queue_counter++;
 349
 350         hd = HD(cmd);
 351         sh = cmd->device->host;
 352         base = sh->base;
 353
 354         /* use only slot 0, as 2001 can handle only one cmd at a time */
 355
 356         y = x = 0;
 357
 358         if (hd->ccb[y].status != FREE) {
 359
 360                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 361 #if DEBUG_EATA
 362                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 363 #else
 364                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 365 #endif
 366         }
 367
 368         cp = &hd->ccb[y];
 369
 370         memset(cp, 0, sizeof(struct eata_ccb));
 371
 372         cp->status = USED;      /* claim free slot */
 373
 374         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 375                 "eata_pio_queue pid %ld, y %d\n",
 376                 cmd->serial_number, y));
 377
 378         cmd->scsi_done = (void *) done;
 379
 380         if (cmd->sc_data_direction == DMA_TO_DEVICE)
 381                 cp->DataOut = 1;        /* Output mode */
 382         else
 383                 cp->DataIn = 0; /* Input mode  */
 384
 385         cp->Interpret = (cmd->device->id == hd->hostid);
 386         cp->cp_datalen = cpu_to_be32(scsi_bufflen(cmd));
 387         cp->Auto_Req_Sen = 0;
 388         cp->cp_reqDMA = 0;
 389         cp->reqlen = 0;
 390
 391         cp->cp_id = cmd->device->id;
 392         cp->cp_lun = cmd->device->lun;
 393         cp->cp_dispri = 0;
 394         cp->cp_identify = 1;
 395         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 396
 397         cp->cp_statDMA = 0;
 398
 399         cp->cp_viraddr = cp;
 400         cp->cmd = cmd;
 401         cmd->host_scribble = (char *) &hd->ccb[y];
 402
 403         if (!scsi_bufflen(cmd)) {
 404                 cmd->SCp.buffers_residual = 1;
 405                 cmd->SCp.ptr = NULL;
 406                 cmd->SCp.this_residual = 0;
 407                 cmd->SCp.buffer = NULL;
 408         } else {
 409                 cmd->SCp.buffer = scsi_sglist(cmd);
 410                 cmd->SCp.buffers_residual = scsi_sg_count(cmd);
 411                 cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
 412                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
 413         }
 414         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes
 415                                                                  * are to transfer */
 416
 417         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 418                 cmd->result = DID_BUS_BUSY << 16;
 419                 scmd_printk(KERN_NOTICE, cmd,
 420                         "eata_pio_queue pid %ld, HBA busy, "
 421                         "returning DID_BUS_BUSY, done.\n", cmd->serial_number);
 422                 done(cmd);
 423                 cp->status = FREE;
 424                 return 0;
 425         }
 426         /* FIXME: timeout */
 427         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 428                 cpu_relax();
 429         outsw(base + HA_RDATA, cp, hd->cplen);
 430         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 431         for (x = 0; x < hd->cppadlen; x++)
 432                 outw(0, base + HA_RDATA);
 433
 434         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 435                 "Queued base %#.4lx pid: %ld "
 436                 "slot %d irq %d\n", sh->base, cmd->serial_number, y, sh->irq));
 437
 438         return 0;
 439 }
 440
 441 static int eata_pio_abort(struct scsi_cmnd *cmd)
 442 {
 443         unsigned int loop = 100;
 444
 445         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 446                 "eata_pio_abort called pid: %ld\n",
 447                 cmd->serial_number));
 448
 449         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 450                 if (--loop == 0) {
 451                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 452                         return FAILED;
 453                 }
 454         if (CD(cmd)->status == FREE) {
 455                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 456                 return FAILED;
 457         }
 458         if (CD(cmd)->status == USED) {
 459                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 460                 /* We want to sleep a bit more here */
 461                 return FAILED;          /* SNOOZE */
 462         }
 463         if (CD(cmd)->status == RESET) {
 464                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 465                 return FAILED;
 466         }
 467         if (CD(cmd)->status == LOCKED) {
 468                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 469                 return FAILED;
 470         }
 471         panic("eata_pio: abort: invalid slot status\n");
 472 }
 473
 474 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 475 {
 476         unsigned int x, limit = 0;
 477         unsigned char success = 0;
 478         struct scsi_cmnd *sp;
 479         struct Scsi_Host *host = cmd->device->host;
 480
 481         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 482                 "eata_pio_reset called pid:%ld\n",
 483                 cmd->serial_number));
 484
 485         spin_lock_irq(host->host_lock);
 486
 487         if (HD(cmd)->state == RESET) {
 488                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 489                 spin_unlock_irq(host->host_lock);
 490                 return FAILED;
 491         }
 492
 493         /* force all slots to be free */
 494
 495         for (x = 0; x < cmd->device->host->can_queue; x++) {
 496
 497                 if (HD(cmd)->ccb[x].status == FREE)
 498                         continue;
 499
 500                 sp = HD(cmd)->ccb[x].cmd;
 501                 HD(cmd)->ccb[x].status = RESET;
 502                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->serial_number);
 503
 504                 if (sp == NULL)
 505                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 506         }
 507
 508         /* hard reset the HBA  */
 509         outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
 510
 511         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 512         HD(cmd)->state = RESET;
 513
 514         spin_unlock_irq(host->host_lock);
 515         msleep(3000);
 516         spin_lock_irq(host->host_lock);
 517
 518         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 519
 520         for (x = 0; x < cmd->device->host->can_queue; x++) {
 521
 522                 /* Skip slots already set free by interrupt */
 523                 if (HD(cmd)->ccb[x].status != RESET)
 524                         continue;
 525
 526                 sp = HD(cmd)->ccb[x].cmd;
 527                 sp->result = DID_RESET << 16;
 528
 529                 /* This mailbox is terminated */
 530                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 531                 HD(cmd)->ccb[x].status = FREE;
 532
 533                 sp->scsi_done(sp);
 534         }
 535
 536         HD(cmd)->state = 0;
 537
 538         spin_unlock_irq(host->host_lock);
 539
 540         if (success) {          /* hmmm... */
 541                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 542                 return SUCCESS;
 543         } else {
 544                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 545                 return FAILED;
 546         }
 547 }
 548
 549 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
 550 {
 551         struct eata_ccb cp;
 552         static char buff[256];
 553         int z;
 554
 555         memset(&cp, 0, sizeof(struct eata_ccb));
 556         memset(buff, 0, sizeof(buff));
 557
 558         cp.DataIn = 1;
 559         cp.Interpret = 1;       /* Interpret command */
 560
 561         cp.cp_datalen = cpu_to_be32(254);
 562         cp.cp_dataDMA = cpu_to_be32(0);
 563
 564         cp.cp_id = id;
 565         cp.cp_lun = 0;
 566
 567         cp.cp_cdb[0] = INQUIRY;
 568         cp.cp_cdb[1] = 0;
 569         cp.cp_cdb[2] = 0;
 570         cp.cp_cdb[3] = 0;
 571         cp.cp_cdb[4] = 254;
 572         cp.cp_cdb[5] = 0;
 573
 574         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
 575                 return NULL;
 576
 577         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 578                 cpu_relax();
 579
 580         outsw(base + HA_RDATA, &cp, cplen);
 581         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 582         for (z = 0; z < cppadlen; z++)
 583                 outw(0, base + HA_RDATA);
 584
 585         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 586                 cpu_relax();
 587
 588         if (inb(base + HA_RSTATUS) & HA_SERROR)
 589                 return NULL;
 590         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 591                 return NULL;
 592         else {
 593                 insw(base + HA_RDATA, &buff, 127);
 594                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
 595                         inw(base + HA_RDATA);
 596                 return buff;
 597         }
 598 }
 599
 600 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
 601 {
 602         unsigned long loop = HZ / 2;
 603         int z;
 604         unsigned short *p;
 605
 606         if (!request_region(base, 9, "eata_pio"))
 607                 return 0;
 608
 609         memset(buf, 0, sizeof(struct get_conf));
 610
 611         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 612                 if (--loop == 0)
 613                         goto fail;
 614
 615         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
 616         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 617
 618         loop = 50;
 619         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 620                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 621                         if (--loop == 0)
 622                                 goto fail;
 623
 624                 loop = 50;
 625                 *p = inw(base + HA_RDATA);
 626         }
 627         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 628                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 629                                         "transfer for HBA at %lx\n", base));
 630                 goto fail;
 631         }
 632
 633         if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
 634                 goto fail;
 635
 636         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 637                                 "at %#4lx EATA Level: %x\n",
 638                                 base, (unsigned int) (buf->version)));
 639
 640         while (inb(base + HA_RSTATUS) & HA_SDRQ)
 641                 inw(base + HA_RDATA);
 642
 643         if (!ALLOW_DMA_BOARDS) {
 644                 for (z = 0; z < MAXISA; z++)
 645                         if (base == ISAbases[z]) {
 646                                 buf->IRQ = ISAirqs[z];
 647                                 break;
 648                         }
 649         }
 650
 651         return 1;
 652
 653  fail:
 654         release_region(base, 9);
 655         return 0;
 656 }
 657
 658 static void print_pio_config(struct get_conf *gc)
 659 {
 660         printk("Please check values: (read config data)\n");
 661         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);
 662         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);
 663         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);
 664 }
 665
 666 static unsigned int print_selftest(unsigned int base)
 667 {
 668         unsigned char buffer[512];
 669 #ifdef VERBOSE_SETUP
 670         int z;
 671 #endif
 672
 673         printk("eata_pio: executing controller self test & setup...\n");
 674         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 675         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 676         do {
 677                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
 678                         /* nothing */ ;
 679                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 680                         insw(base + HA_RDATA, &buffer, 256);
 681 #ifdef VERBOSE_SETUP
 682                         /* no beeps please... */
 683                         for (z = 0; z < 511 && buffer[z]; z++)
 684                                 if (buffer[z] != 7)
 685                                         printk("%c", buffer[z]);
 686 #endif
 687                 }
 688         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 689
 690         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 691 }
 692
 693 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
 694 {
 695         unsigned long size = 0;
 696         char *buff;
 697         unsigned long cplen;
 698         unsigned short cppadlen;
 699         struct Scsi_Host *sh;
 700         hostdata *hd;
 701
 702         DBG(DBG_REGISTER, print_pio_config(gc));
 703
 704         if (gc->DMA_support) {
 705                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 706                 if (!ALLOW_DMA_BOARDS)
 707                         return 0;
 708         }
 709
 710         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) {
 711                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
 712                 return 0;
 713         }
 714
 715         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 716                 printk("HBA at %#lx failed while performing self test & setup.\n", base);
 717                 return 0;
 718         }
 719
 720         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
 721
 722         sh = scsi_register(&driver_template, size);
 723         if (sh == NULL)
 724                 return 0;
 725
 726         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 727                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
 728                         reg_IRQ[gc->IRQ]++;
 729                         if (!gc->IRQ_TR)
 730                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 731                 } else {
 732                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 733                         return 0;
 734                 }
 735         } else {                /* More than one HBA on this IRQ */
 736                 if (reg_IRQL[gc->IRQ]) {
 737                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 738                         return 0;
 739                 } else
 740                         reg_IRQ[gc->IRQ]++;
 741         }
 742
 743         hd = SD(sh);
 744
 745         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
 746         memset(hd->reads, 0, sizeof(hd->reads));
 747
 748         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 749         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 750         SD(sh)->revision[0] = buff[32];
 751         SD(sh)->revision[1] = buff[33];
 752         SD(sh)->revision[2] = buff[34];
 753         SD(sh)->revision[3] = '.';
 754         SD(sh)->revision[4] = buff[35];
 755         SD(sh)->revision[5] = 0;
 756
 757         switch (be32_to_cpu(gc->len)) {
 758         case 0x1c:
 759                 SD(sh)->EATA_revision = 'a';
 760                 break;
 761         case 0x1e:
 762                 SD(sh)->EATA_revision = 'b';
 763                 break;
 764         case 0x22:
 765                 SD(sh)->EATA_revision = 'c';
 766                 break;
 767         case 0x24:
 768                 SD(sh)->EATA_revision = 'z';
 769         default:
 770                 SD(sh)->EATA_revision = '?';
 771         }
 772
 773         if (be32_to_cpu(gc->len) >= 0x22) {
 774                 if (gc->is_PCI)
 775                         hd->bustype = IS_PCI;
 776                 else if (gc->is_EISA)
 777                         hd->bustype = IS_EISA;
 778                 else
 779                         hd->bustype = IS_ISA;
 780         } else {
 781                 if (buff[21] == '4')
 782                         hd->bustype = IS_PCI;
 783                 else if (buff[21] == '2')
 784                         hd->bustype = IS_EISA;
 785                 else
 786                         hd->bustype = IS_ISA;
 787         }
 788
 789         SD(sh)->cplen = cplen;
 790         SD(sh)->cppadlen = cppadlen;
 791         SD(sh)->hostid = gc->scsi_id[3];
 792         SD(sh)->devflags = 1 << gc->scsi_id[3];
 793         SD(sh)->moresupport = gc->MORE_support;
 794         sh->unique_id = base;
 795         sh->base = base;
 796         sh->io_port = base;
 797         sh->n_io_port = 9;
 798         sh->irq = gc->IRQ;
 799         sh->dma_channel = PIO;
 800         sh->this_id = gc->scsi_id[3];
 801         sh->can_queue = 1;
 802         sh->cmd_per_lun = 1;
 803         sh->sg_tablesize = SG_ALL;
 804
 805         hd->channel = 0;
 806
 807         hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
 808
 809         sh->max_id = 8;
 810         sh->max_lun = 8;
 811
 812         if (gc->SECOND)
 813                 hd->primary = 0;
 814         else
 815                 hd->primary = 1;
 816
 817         hd->next = NULL;        /* build a linked list of all HBAs */
 818         hd->prev = last_HBA;
 819         if (hd->prev != NULL)
 820                 SD(hd->prev)->next = sh;
 821         last_HBA = sh;
 822         if (first_HBA == NULL)
 823                 first_HBA = sh;
 824         registered_HBAs++;
 825         return (1);
 826 }
 827
 828 static void find_pio_ISA(struct get_conf *buf)
 829 {
 830         int i;
 831
 832         for (i = 0; i < MAXISA; i++) {
 833                 if (!ISAbases[i])
 834                         continue;
 835                 if (!get_pio_conf_PIO(ISAbases[i], buf))
 836                         continue;
 837                 if (!register_pio_HBA(ISAbases[i], buf, NULL))
 838                         release_region(ISAbases[i], 9);
 839                 else
 840                         ISAbases[i] = 0;
 841         }
 842         return;
 843 }
 844
 845 static void find_pio_EISA(struct get_conf *buf)
 846 {
 847         u32 base;
 848         int i;
 849
 850 #ifdef CHECKPAL
 851         u8 pal1, pal2, pal3;
 852 #endif
 853
 854         for (i = 0; i < MAXEISA; i++) {
 855                 if (EISAbases[i]) {     /* Still a possibility ?          */
 856
 857                         base = 0x1c88 + (i * 0x1000);
 858 #ifdef CHECKPAL
 859                         pal1 = inb((u16) base - 8);
 860                         pal2 = inb((u16) base - 7);
 861                         pal3 = inb((u16) base - 6);
 862
 863                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 864                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 865 #endif
 866                                 if (get_pio_conf_PIO(base, buf)) {
 867                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 868                                         if (buf->IRQ) {
 869                                                 if (!register_pio_HBA(base, buf, NULL))
 870                                                         release_region(base, 9);
 871                                         } else {
 872                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 873                                                 release_region(base, 9);
 874                                         }
 875                                 }
 876                                 /* Nothing found here so we take it from the list */
 877                                 EISAbases[i] = 0;
 878 #ifdef CHECKPAL
 879                         }
 880 #endif
 881                 }
 882         }
 883         return;
 884 }
 885
 886 static void find_pio_PCI(struct get_conf *buf)
 887 {
 888 #ifndef CONFIG_PCI
 889         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 890 #else
 891         struct pci_dev *dev = NULL;
 892         unsigned long base, x;
 893
 894         while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 895                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 896                 if (pci_enable_device(dev))
 897                         continue;
 898                 pci_set_master(dev);
 899                 base = pci_resource_flags(dev, 0);
 900                 if (base & IORESOURCE_MEM) {
 901                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 902                         continue;
 903                 }
 904                 base = pci_resource_start(dev, 0);
 905                 /* EISA tag there ? */
 906                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 907                         continue;       /* Jep, it's forced, so move on  */
 908                 base += 0x10;   /* Now, THIS is the real address */
 909                 if (base != 0x1f8) {
 910                         /* We didn't find it in the primary search */
 911                         if (get_pio_conf_PIO(base, buf)) {
 912                                 if (buf->FORCADR) {     /* If the address is forced */
 913                                         release_region(base, 9);
 914                                         continue;       /* we'll find it later      */
 915                                 }
 916
 917                                 /* OK. We made it till here, so we can go now
 918                                  * and register it. We  only have to check and
 919                                  * eventually remove it from the EISA and ISA list
 920                                  */
 921
 922                                 if (!register_pio_HBA(base, buf, dev)) {
 923                                         release_region(base, 9);
 924                                         continue;
 925                                 }
 926
 927                                 if (base < 0x1000) {
 928                                         for (x = 0; x < MAXISA; ++x) {
 929                                                 if (ISAbases[x] == base) {
 930                                                         ISAbases[x] = 0;
 931                                                         break;
 932                                                 }
 933                                         }
 934                                 } else if ((base & 0x0fff) == 0x0c88) {
 935                                         x = (base >> 12) & 0x0f;
 936                                         EISAbases[x] = 0;
 937                                 }
 938                         }
 939 #ifdef CHECK_BLINK
 940                         else if (check_blink_state(base)) {
 941                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 942                         }
 943 #endif
 944                 }
 945         }
 946 #endif                          /* #ifndef CONFIG_PCI */
 947 }
 948
 949 static int eata_pio_detect(struct scsi_host_template *tpnt)
 950 {
 951         struct Scsi_Host *HBA_ptr;
 952         struct get_conf gc;
 953         int i;
 954
 955         find_pio_PCI(&gc);
 956         find_pio_EISA(&gc);
 957         find_pio_ISA(&gc);
 958
 959         for (i = 0; i <= MAXIRQ; i++)
 960                 if (reg_IRQ[i])
 961                         request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
 962
 963         HBA_ptr = first_HBA;
 964
 965         if (registered_HBAs != 0) {
 966                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 967                        "(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);
 968
 969                 printk("Registered HBAs:\n");
 970                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 971                 for (i = 1; i <= registered_HBAs; i++) {
 972                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
 973                                "  %2d  %2d  %2d\n",
 974                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 975                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 976                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 977                                HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 978                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 979                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 980                         HBA_ptr = SD(HBA_ptr)->next;
 981                 }
 982         }
 983         return (registered_HBAs);
 984 }
 985
 986 static struct scsi_host_template driver_template = {
 987         .proc_name              = "eata_pio",
 988         .name                   = "EATA (Extended Attachment) PIO driver",
 989         .proc_info              = eata_pio_proc_info,
 990         .detect                 = eata_pio_detect,
 991         .release                = eata_pio_release,
 992         .queuecommand           = eata_pio_queue,
 993         .eh_abort_handler       = eata_pio_abort,
 994         .eh_host_reset_handler  = eata_pio_host_reset,
 995         .use_clustering         = ENABLE_CLUSTERING,
 996 };
 997
 998 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
 999 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1000 MODULE_LICENSE("GPL");
1001
1002 #include "scsi_module.c"