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