drivers/scsi/eata_pio.c

   1 /************************************************************
   2  *                                                          *
   3  *               Linux EATA SCSI PIO driver                 *
   4  *                                                          *
   5  *  based on the CAM document CAM/89-004 rev. 2.0c,         *
   6  *  DPT's driver kit, some internal documents and source,   *
   7  *  and several other Linux scsi drivers and kernel docs.   *
   8  *                                                          *
   9  *  The driver currently:                                   *
  10  *      -supports all EATA-PIO boards                       *
  11  *      -only supports DASD devices                         *
  12  *                                                          *
  13  *  (c)1993-96 Michael Neuffer, Alfred Arnold               *
  14  *             neuffer@goofy.zdv.uni-mainz.de               *
  15  *             a.arnold@kfa-juelich.de                      *
  16  *                                                          *
  17  *  Updated 2002 by Alan Cox <alan@redhat.com> for Linux    *
  18  *  2.5.x and the newer locking and error handling          *
  19  *                                                          *
  20  *  This program is free software; you can redistribute it  *
  21  *  and/or modify it under the terms of the GNU General     *
  22  *  Public License as published by the Free Software        *
  23  *  Foundation; either version 2 of the License, or         *
  24  *  (at your option) any later version.                     *
  25  *                                                          *
  26  *  This program is distributed in the hope that it will be *
  27  *  useful, but WITHOUT ANY WARRANTY; without even the      *
  28  *  implied warranty of MERCHANTABILITY or FITNESS FOR A    *
  29  *  PARTICULAR PURPOSE.  See the GNU General Public License *
  30  *  for more details.                                       *
  31  *                                                          *
  32  *  You should have received a copy of the GNU General      *
  33  *  Public License along with this kernel; if not, write to *
  34  *  the Free Software Foundation, Inc., 675 Mass Ave,       *
  35  *  Cambridge, MA 02139, USA.                               *
  36  *                                                          *
  37  *  For the avoidance of doubt the "preferred form" of this *
  38  *  code is one which is in an open non patent encumbered   *
  39  *  format. Where cryptographic key signing forms part of   *
  40  *  the process of creating an executable the information   *
  41  *  including keys needed to generate an equivalently       *
  42  *  functional executable are deemed to be part of the      *
  43  *  source code are deemed to be part of the source code.   *
  44  *                                                          *
  45  ************************************************************
  46  *  last change: 2002/11/02               OS: Linux 2.5.45  *
  47  ************************************************************/
  48
  49 #include <linux/module.h>
  50 #include <linux/kernel.h>
  51 #include <linux/sched.h>
  52 #include <linux/string.h>
  53 #include <linux/ioport.h>
  54 #include <linux/slab.h>
  55 #include <linux/in.h>
  56 #include <linux/pci.h>
  57 #include <linux/proc_fs.h>
  58 #include <linux/interrupt.h>
  59 #include <linux/blkdev.h>
  60 #include <linux/spinlock.h>
  61 #include <linux/delay.h>
  62
  63 #include <asm/io.h>
  64
  65 #include <scsi/scsi.h>
  66 #include <scsi/scsi_cmnd.h>
  67 #include <scsi/scsi_device.h>
  68 #include <scsi/scsi_host.h>
  69
  70 #include "eata_generic.h"
  71 #include "eata_pio.h"
  72
  73
  74 static unsigned int ISAbases[MAXISA] =  {
  75          0x1F0, 0x170, 0x330, 0x230
  76 };
  77
  78 static unsigned int ISAirqs[MAXISA] = {
  79         14, 12, 15, 11
  80 };
  81
  82 static unsigned char EISAbases[] = {
  83         1, 1, 1, 1, 1, 1, 1, 1,
  84         1, 1, 1, 1, 1, 1, 1, 1
  85 };
  86
  87 static unsigned int registered_HBAs;
  88 static struct Scsi_Host *last_HBA;
  89 static struct Scsi_Host *first_HBA;
  90 static unsigned char reg_IRQ[16];
  91 static unsigned char reg_IRQL[16];
  92 static unsigned long int_counter;
  93 static unsigned long queue_counter;
  94
  95 static struct scsi_host_template driver_template;
  96
  97 /*
  98  * eata_proc_info
  99  * inout : decides on the direction of the dataflow and the meaning of the
 100  *         variables
 101  * buffer: If inout==FALSE data is being written to it else read from it
 102  * *start: If inout==FALSE start of the valid data in the buffer
 103  * offset: If inout==FALSE offset from the beginning of the imaginary file
 104  *         from which we start writing into the buffer
 105  * length: If inout==FALSE max number of bytes to be written into the buffer
 106  *         else number of bytes in the buffer
 107  */
 108 static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
 109                               int length, int rw)
 110 {
 111     static u8 buff[512];
 112     int size, len = 0;
 113     off_t begin = 0, pos = 0;
 114
 115     if (rw)
 116         return -ENOSYS;
 117     if (offset == 0)
 118         memset(buff, 0, sizeof(buff));
 119
 120     size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
 121                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
 122     len += size; pos = begin + len;
 123     size = sprintf(buffer + len, "queued commands:     %10ld\n"
 124                    "processed interrupts:%10ld\n", queue_counter, int_counter);
 125     len += size; pos = begin + len;
 126
 127     size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
 128                    shost->host_no, SD(shost)->name);
 129     len += size;
 130     pos = begin + len;
 131     size = sprintf(buffer + len, "Firmware revision: v%s\n",
 132                    SD(shost)->revision);
 133     len += size;
 134     pos = begin + len;
 135     size = sprintf(buffer + len, "IO: PIO\n");
 136     len += size;
 137     pos = begin + len;
 138     size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
 139     len += size;
 140     pos = begin + len;
 141     size = sprintf(buffer + len, "Host Bus: %s\n",
 142                    (SD(shost)->bustype == 'P')?"PCI ":
 143                    (SD(shost)->bustype == 'E')?"EISA":"ISA ");
 144
 145     len += size;
 146     pos = begin + len;
 147
 148     if (pos < offset) {
 149         len = 0;
 150         begin = pos;
 151     }
 152     if (pos > offset + length)
 153         goto stop_output;
 154
 155  stop_output:
 156     DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
 157     *start=buffer+(offset-begin);   /* Start of wanted data */
 158     len-=(offset-begin);            /* Start slop */
 159     if(len>length)
 160         len = length;               /* Ending slop */
 161     DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
 162
 163     return (len);
 164 }
 165
 166 static int eata_pio_release(struct Scsi_Host *sh)
 167 {
 168         hostdata *hd = SD(sh);
 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         /* At this point the PCI reference can go */
 178         if (hd->pdev)
 179                 pci_dev_put(hd->pdev);
 180         return 1;
 181 }
 182
 183 static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
 184 {
 185         SCp->ptr += Increment;
 186         if ((SCp->this_residual -= Increment) == 0) {
 187                 if ((--SCp->buffers_residual) == 0)
 188                         SCp->Status = 0;
 189                 else {
 190                         SCp->buffer++;
 191                         SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
 192                         SCp->this_residual = SCp->buffer->length;
 193                 }
 194         }
 195 }
 196
 197 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
 198
 199 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
 200 {
 201         unsigned long flags;
 202         struct Scsi_Host *dev = dev_id;
 203         irqreturn_t ret;
 204
 205         spin_lock_irqsave(dev->host_lock, flags);
 206         ret = eata_pio_int_handler(irq, dev_id);
 207         spin_unlock_irqrestore(dev->host_lock, flags);
 208         return ret;
 209 }
 210
 211 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
 212 {
 213         unsigned int eata_stat = 0xfffff;
 214         struct scsi_cmnd *cmd;
 215         hostdata *hd;
 216         struct eata_ccb *cp;
 217         unsigned long base;
 218         unsigned int x, z;
 219         struct Scsi_Host *sh;
 220         unsigned short zwickel = 0;
 221         unsigned char stat, odd;
 222         irqreturn_t ret = IRQ_NONE;
 223
 224         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
 225         {
 226                 if (sh->irq != irq)
 227                         continue;
 228                 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
 229                         continue;
 230
 231                 int_counter++;
 232                 ret = IRQ_HANDLED;
 233
 234                 hd = SD(sh);
 235
 236                 cp = &hd->ccb[0];
 237                 cmd = cp->cmd;
 238                 base = cmd->device->host->base;
 239
 240                 do {
 241                         stat = inb(base + HA_RSTATUS);
 242                         if (stat & HA_SDRQ) {
 243                                 if (cp->DataIn) {
 244                                         z = 256;
 245                                         odd = 0;
 246                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 247                                                 if (odd) {
 248                                                         *(cmd->SCp.ptr) = zwickel >> 8;
 249                                                         IncStat(&cmd->SCp, 1);
 250                                                         odd = 0;
 251                                                 }
 252                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 253                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
 254                                                 z -= x;
 255                                                 IncStat(&cmd->SCp, 2 * x);
 256                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 257                                                         zwickel = inw(base + HA_RDATA);
 258                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
 259                                                         IncStat(&cmd->SCp, 1);
 260                                                         z--;
 261                                                         odd = 1;
 262                                                 }
 263                                         }
 264                                         while (z > 0) {
 265                                                 zwickel = inw(base + HA_RDATA);
 266                                                 z--;
 267                                         }
 268                                 } else {        /* cp->DataOut */
 269
 270                                         odd = 0;
 271                                         z = 256;
 272                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 273                                                 if (odd) {
 274                                                         zwickel += *(cmd->SCp.ptr) << 8;
 275                                                         IncStat(&cmd->SCp, 1);
 276                                                         outw(zwickel, base + HA_RDATA);
 277                                                         z--;
 278                                                         odd = 0;
 279                                                 }
 280                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 281                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 282                                                 z -= x;
 283                                                 IncStat(&cmd->SCp, 2 * x);
 284                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 285                                                         zwickel = *(cmd->SCp.ptr);
 286                                                         zwickel &= 0xff;
 287                                                         IncStat(&cmd->SCp, 1);
 288                                                         odd = 1;
 289                                                 }
 290                                         }
 291                                         while (z > 0 || odd) {
 292                                                 outw(zwickel, base + HA_RDATA);
 293                                                 z--;
 294                                                 odd = 0;
 295                                         }
 296                                 }
 297                         }
 298                 }
 299                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 300
 301                 /* terminate handler if HBA goes busy again, i.e. transfers
 302                  * more data */
 303
 304                 if (stat & HA_SBUSY)
 305                         break;
 306
 307                 /* OK, this is quite stupid, but I haven't found any correct
 308                  * way to get HBA&SCSI status so far */
 309
 310                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 311                         cmd->result = (DID_OK << 16);
 312                         hd->devflags |= (1 << cp->cp_id);
 313                 } else if (hd->devflags & (1 << cp->cp_id))
 314                         cmd->result = (DID_OK << 16) + 0x02;
 315                 else
 316                         cmd->result = (DID_NO_CONNECT << 16);
 317
 318                 if (cp->status == LOCKED) {
 319                         cp->status = FREE;
 320                         eata_stat = inb(base + HA_RSTATUS);
 321                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 322                         return ret;
 323                 }
 324 #if DBG_INTR2
 325                 if (stat != 0x50)
 326                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 327 #endif
 328
 329                 cp->status = FREE;      /* now we can release the slot  */
 330
 331                 cmd->scsi_done(cmd);
 332         }
 333
 334         return ret;
 335 }
 336
 337 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
 338 {
 339         unsigned int loop = 50;
 340
 341         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 342                 if (--loop == 0)
 343                         return 1;
 344
 345         /* Enable interrupts for HBA.  It is not the best way to do it at this
 346          * place, but I hope that it doesn't interfere with the IDE driver
 347          * initialization this way */
 348
 349         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 350
 351         outb(command, base + HA_WCOMMAND);
 352         return 0;
 353 }
 354
 355 static int eata_pio_queue(struct scsi_cmnd *cmd,
 356                 void (*done)(struct scsi_cmnd *))
 357 {
 358         unsigned int x, y;
 359         unsigned long base;
 360
 361         hostdata *hd;
 362         struct Scsi_Host *sh;
 363         struct eata_ccb *cp;
 364
 365         queue_counter++;
 366
 367         hd = HD(cmd);
 368         sh = cmd->device->host;
 369         base = sh->base;
 370
 371         /* use only slot 0, as 2001 can handle only one cmd at a time */
 372
 373         y = x = 0;
 374
 375         if (hd->ccb[y].status != FREE) {
 376
 377                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 378 #if DEBUG_EATA
 379                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 380 #else
 381                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 382 #endif
 383         }
 384
 385         cp = &hd->ccb[y];
 386
 387         memset(cp, 0, sizeof(struct eata_ccb));
 388         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 389
 390         cp->status = USED;      /* claim free slot */
 391
 392         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 393                 "eata_pio_queue pid %ld, y %d\n",
 394                 cmd->pid, y));
 395
 396         cmd->scsi_done = (void *) done;
 397
 398         if (cmd->sc_data_direction == DMA_TO_DEVICE)
 399                 cp->DataOut = 1;        /* Output mode */
 400         else
 401                 cp->DataIn = 0; /* Input mode  */
 402
 403         cp->Interpret = (cmd->device->id == hd->hostid);
 404         cp->cp_datalen = cpu_to_be32(cmd->request_bufflen);
 405         cp->Auto_Req_Sen = 0;
 406         cp->cp_reqDMA = 0;
 407         cp->reqlen = 0;
 408
 409         cp->cp_id = cmd->device->id;
 410         cp->cp_lun = cmd->device->lun;
 411         cp->cp_dispri = 0;
 412         cp->cp_identify = 1;
 413         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 414
 415         cp->cp_statDMA = 0;
 416
 417         cp->cp_viraddr = cp;
 418         cp->cmd = cmd;
 419         cmd->host_scribble = (char *) &hd->ccb[y];
 420
 421         if (cmd->use_sg == 0) {
 422                 cmd->SCp.buffers_residual = 1;
 423                 cmd->SCp.ptr = cmd->request_buffer;
 424                 cmd->SCp.this_residual = cmd->request_bufflen;
 425                 cmd->SCp.buffer = NULL;
 426         } else {
 427                 cmd->SCp.buffer = cmd->request_buffer;
 428                 cmd->SCp.buffers_residual = cmd->use_sg;
 429                 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
 430                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
 431         }
 432         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes
 433                                                                  * are to transfer */
 434
 435         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 436                 cmd->result = DID_BUS_BUSY << 16;
 437                 scmd_printk(KERN_NOTICE, cmd,
 438                         "eata_pio_queue pid %ld, HBA busy, "
 439                         "returning DID_BUS_BUSY, done.\n", cmd->pid);
 440                 done(cmd);
 441                 cp->status = FREE;
 442                 return (0);
 443         }
 444         /* FIXME: timeout */
 445         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 446                 cpu_relax();
 447         outsw(base + HA_RDATA, cp, hd->cplen);
 448         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 449         for (x = 0; x < hd->cppadlen; x++)
 450                 outw(0, base + HA_RDATA);
 451
 452         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 453                 "Queued base %#.4lx pid: %ld "
 454                 "slot %d irq %d\n", sh->base, cmd->pid, y, sh->irq));
 455
 456         return (0);
 457 }
 458
 459 static int eata_pio_abort(struct scsi_cmnd *cmd)
 460 {
 461         unsigned int loop = 100;
 462
 463         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 464                 "eata_pio_abort called pid: %ld\n",
 465                 cmd->pid));
 466
 467         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 468                 if (--loop == 0) {
 469                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 470                         return FAILED;
 471                 }
 472         if (CD(cmd)->status == FREE) {
 473                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 474                 return FAILED;
 475         }
 476         if (CD(cmd)->status == USED) {
 477                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 478                 /* We want to sleep a bit more here */
 479                 return FAILED;          /* SNOOZE */
 480         }
 481         if (CD(cmd)->status == RESET) {
 482                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 483                 return FAILED;
 484         }
 485         if (CD(cmd)->status == LOCKED) {
 486                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 487                 return FAILED;
 488         }
 489         panic("eata_pio: abort: invalid slot status\n");
 490 }
 491
 492 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 493 {
 494         unsigned int x, limit = 0;
 495         unsigned char success = 0;
 496         struct scsi_cmnd *sp;
 497         struct Scsi_Host *host = cmd->device->host;
 498
 499         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 500                 "eata_pio_reset called pid:%ld\n",
 501                 cmd->pid));
 502
 503         spin_lock_irq(host->host_lock);
 504
 505         if (HD(cmd)->state == RESET) {
 506                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 507                 spin_unlock_irq(host->host_lock);
 508                 return FAILED;
 509         }
 510
 511         /* force all slots to be free */
 512
 513         for (x = 0; x < cmd->device->host->can_queue; x++) {
 514
 515                 if (HD(cmd)->ccb[x].status == FREE)
 516                         continue;
 517
 518                 sp = HD(cmd)->ccb[x].cmd;
 519                 HD(cmd)->ccb[x].status = RESET;
 520                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 521
 522                 if (sp == NULL)
 523                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 524         }
 525
 526         /* hard reset the HBA  */
 527         outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
 528
 529         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 530         HD(cmd)->state = RESET;
 531
 532         spin_unlock_irq(host->host_lock);
 533         msleep(3000);
 534         spin_lock_irq(host->host_lock);
 535
 536         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 537
 538         for (x = 0; x < cmd->device->host->can_queue; x++) {
 539
 540                 /* Skip slots already set free by interrupt */
 541                 if (HD(cmd)->ccb[x].status != RESET)
 542                         continue;
 543
 544                 sp = HD(cmd)->ccb[x].cmd;
 545                 sp->result = DID_RESET << 16;
 546
 547                 /* This mailbox is terminated */
 548                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 549                 HD(cmd)->ccb[x].status = FREE;
 550
 551                 sp->scsi_done(sp);
 552         }
 553
 554         HD(cmd)->state = 0;
 555
 556         spin_unlock_irq(host->host_lock);
 557
 558         if (success) {          /* hmmm... */
 559                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 560                 return SUCCESS;
 561         } else {
 562                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 563                 return FAILED;
 564         }
 565 }
 566
 567 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
 568 {
 569         struct eata_ccb cp;
 570         static char buff[256];
 571         int z;
 572
 573         memset(&cp, 0, sizeof(struct eata_ccb));
 574         memset(buff, 0, sizeof(buff));
 575
 576         cp.DataIn = 1;
 577         cp.Interpret = 1;       /* Interpret command */
 578
 579         cp.cp_datalen = cpu_to_be32(254);
 580         cp.cp_dataDMA = cpu_to_be32(0);
 581
 582         cp.cp_id = id;
 583         cp.cp_lun = 0;
 584
 585         cp.cp_cdb[0] = INQUIRY;
 586         cp.cp_cdb[1] = 0;
 587         cp.cp_cdb[2] = 0;
 588         cp.cp_cdb[3] = 0;
 589         cp.cp_cdb[4] = 254;
 590         cp.cp_cdb[5] = 0;
 591
 592         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
 593                 return (NULL);
 594         while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 595         outsw(base + HA_RDATA, &cp, cplen);
 596         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 597         for (z = 0; z < cppadlen; z++)
 598                 outw(0, base + HA_RDATA);
 599
 600         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 601         if (inb(base + HA_RSTATUS) & HA_SERROR)
 602                 return (NULL);
 603         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 604                 return (NULL);
 605         else {
 606                 insw(base + HA_RDATA, &buff, 127);
 607                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
 608                         inw(base + HA_RDATA);
 609                 return (buff);
 610         }
 611 }
 612
 613 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
 614 {
 615         unsigned long loop = HZ / 2;
 616         int z;
 617         unsigned short *p;
 618
 619         if (!request_region(base, 9, "eata_pio"))
 620                 return 0;
 621
 622         memset(buf, 0, sizeof(struct get_conf));
 623
 624         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 625                 if (--loop == 0)
 626                         goto fail;
 627
 628         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
 629         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 630
 631         loop = 50;
 632         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 633                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 634                         if (--loop == 0)
 635                                 goto fail;
 636
 637                 loop = 50;
 638                 *p = inw(base + HA_RDATA);
 639         }
 640         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 641                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 642                                         "transfer for HBA at %lx\n", base));
 643                 goto fail;
 644         }
 645
 646         if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
 647                 goto fail;
 648
 649         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 650                                 "at %#4lx EATA Level: %x\n",
 651                                 base, (unsigned int) (buf->version)));
 652
 653         while (inb(base + HA_RSTATUS) & HA_SDRQ)
 654                 inw(base + HA_RDATA);
 655
 656         if (!ALLOW_DMA_BOARDS) {
 657                 for (z = 0; z < MAXISA; z++)
 658                         if (base == ISAbases[z]) {
 659                                 buf->IRQ = ISAirqs[z];
 660                                 break;
 661                         }
 662         }
 663
 664         return 1;
 665
 666  fail:
 667         release_region(base, 9);
 668         return 0;
 669 }
 670
 671 static void print_pio_config(struct get_conf *gc)
 672 {
 673         printk("Please check values: (read config data)\n");
 674         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);
 675         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);
 676         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);
 677 }
 678
 679 static unsigned int print_selftest(unsigned int base)
 680 {
 681         unsigned char buffer[512];
 682 #ifdef VERBOSE_SETUP
 683         int z;
 684 #endif
 685
 686         printk("eata_pio: executing controller self test & setup...\n");
 687         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 688         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 689         do {
 690                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
 691                         /* nothing */ ;
 692                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 693                         insw(base + HA_RDATA, &buffer, 256);
 694 #ifdef VERBOSE_SETUP
 695                         /* no beeps please... */
 696                         for (z = 0; z < 511 && buffer[z]; z++)
 697                                 if (buffer[z] != 7)
 698                                         printk("%c", buffer[z]);
 699 #endif
 700                 }
 701         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 702
 703         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 704 }
 705
 706 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
 707 {
 708         unsigned long size = 0;
 709         char *buff;
 710         unsigned long cplen;
 711         unsigned short cppadlen;
 712         struct Scsi_Host *sh;
 713         hostdata *hd;
 714
 715         DBG(DBG_REGISTER, print_pio_config(gc));
 716
 717         if (gc->DMA_support) {
 718                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 719                 if (!ALLOW_DMA_BOARDS)
 720                         return 0;
 721         }
 722
 723         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) {
 724                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
 725                 return 0;
 726         }
 727
 728         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 729                 printk("HBA at %#lx failed while performing self test & setup.\n", base);
 730                 return 0;
 731         }
 732
 733         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
 734
 735         sh = scsi_register(&driver_template, size);
 736         if (sh == NULL)
 737                 return 0;
 738
 739         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 740                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
 741                         reg_IRQ[gc->IRQ]++;
 742                         if (!gc->IRQ_TR)
 743                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 744                 } else {
 745                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 746                         return 0;
 747                 }
 748         } else {                /* More than one HBA on this IRQ */
 749                 if (reg_IRQL[gc->IRQ]) {
 750                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 751                         return 0;
 752                 } else
 753                         reg_IRQ[gc->IRQ]++;
 754         }
 755
 756         hd = SD(sh);
 757
 758         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
 759         memset(hd->reads, 0, sizeof(hd->reads));
 760
 761         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 762         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 763         SD(sh)->revision[0] = buff[32];
 764         SD(sh)->revision[1] = buff[33];
 765         SD(sh)->revision[2] = buff[34];
 766         SD(sh)->revision[3] = '.';
 767         SD(sh)->revision[4] = buff[35];
 768         SD(sh)->revision[5] = 0;
 769
 770         switch (be32_to_cpu(gc->len)) {
 771         case 0x1c:
 772                 SD(sh)->EATA_revision = 'a';
 773                 break;
 774         case 0x1e:
 775                 SD(sh)->EATA_revision = 'b';
 776                 break;
 777         case 0x22:
 778                 SD(sh)->EATA_revision = 'c';
 779                 break;
 780         case 0x24:
 781                 SD(sh)->EATA_revision = 'z';
 782         default:
 783                 SD(sh)->EATA_revision = '?';
 784         }
 785
 786         if (be32_to_cpu(gc->len) >= 0x22) {
 787                 if (gc->is_PCI)
 788                         hd->bustype = IS_PCI;
 789                 else if (gc->is_EISA)
 790                         hd->bustype = IS_EISA;
 791                 else
 792                         hd->bustype = IS_ISA;
 793         } else {
 794                 if (buff[21] == '4')
 795                         hd->bustype = IS_PCI;
 796                 else if (buff[21] == '2')
 797                         hd->bustype = IS_EISA;
 798                 else
 799                         hd->bustype = IS_ISA;
 800         }
 801
 802         SD(sh)->cplen = cplen;
 803         SD(sh)->cppadlen = cppadlen;
 804         SD(sh)->hostid = gc->scsi_id[3];
 805         SD(sh)->devflags = 1 << gc->scsi_id[3];
 806         SD(sh)->moresupport = gc->MORE_support;
 807         sh->unique_id = base;
 808         sh->base = base;
 809         sh->io_port = base;
 810         sh->n_io_port = 9;
 811         sh->irq = gc->IRQ;
 812         sh->dma_channel = PIO;
 813         sh->this_id = gc->scsi_id[3];
 814         sh->can_queue = 1;
 815         sh->cmd_per_lun = 1;
 816         sh->sg_tablesize = SG_ALL;
 817
 818         hd->channel = 0;
 819
 820         hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
 821
 822         sh->max_id = 8;
 823         sh->max_lun = 8;
 824
 825         if (gc->SECOND)
 826                 hd->primary = 0;
 827         else
 828                 hd->primary = 1;
 829
 830         sh->unchecked_isa_dma = 0;      /* We can only do PIO */
 831
 832         hd->next = NULL;        /* build a linked list of all HBAs */
 833         hd->prev = last_HBA;
 834         if (hd->prev != NULL)
 835                 SD(hd->prev)->next = sh;
 836         last_HBA = sh;
 837         if (first_HBA == NULL)
 838                 first_HBA = sh;
 839         registered_HBAs++;
 840         return (1);
 841 }
 842
 843 static void find_pio_ISA(struct get_conf *buf)
 844 {
 845         int i;
 846
 847         for (i = 0; i < MAXISA; i++) {
 848                 if (!ISAbases[i])
 849                         continue;
 850                 if (!get_pio_conf_PIO(ISAbases[i], buf))
 851                         continue;
 852                 if (!register_pio_HBA(ISAbases[i], buf, NULL))
 853                         release_region(ISAbases[i], 9);
 854                 else
 855                         ISAbases[i] = 0;
 856         }
 857         return;
 858 }
 859
 860 static void find_pio_EISA(struct get_conf *buf)
 861 {
 862         u32 base;
 863         int i;
 864
 865 #ifdef CHECKPAL
 866         u8 pal1, pal2, pal3;
 867 #endif
 868
 869         for (i = 0; i < MAXEISA; i++) {
 870                 if (EISAbases[i]) {     /* Still a possibility ?          */
 871
 872                         base = 0x1c88 + (i * 0x1000);
 873 #ifdef CHECKPAL
 874                         pal1 = inb((u16) base - 8);
 875                         pal2 = inb((u16) base - 7);
 876                         pal3 = inb((u16) base - 6);
 877
 878                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 879                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 880 #endif
 881                                 if (get_pio_conf_PIO(base, buf)) {
 882                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 883                                         if (buf->IRQ) {
 884                                                 if (!register_pio_HBA(base, buf, NULL))
 885                                                         release_region(base, 9);
 886                                         } else {
 887                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 888                                                 release_region(base, 9);
 889                                         }
 890                                 }
 891                                 /* Nothing found here so we take it from the list */
 892                                 EISAbases[i] = 0;
 893 #ifdef CHECKPAL
 894                         }
 895 #endif
 896                 }
 897         }
 898         return;
 899 }
 900
 901 static void find_pio_PCI(struct get_conf *buf)
 902 {
 903 #ifndef CONFIG_PCI
 904         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 905 #else
 906         struct pci_dev *dev = NULL;
 907         unsigned long base, x;
 908
 909         while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 910                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 911                 if (pci_enable_device(dev))
 912                         continue;
 913                 pci_set_master(dev);
 914                 base = pci_resource_flags(dev, 0);
 915                 if (base & IORESOURCE_MEM) {
 916                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 917                         continue;
 918                 }
 919                 base = pci_resource_start(dev, 0);
 920                 /* EISA tag there ? */
 921                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 922                         continue;       /* Jep, it's forced, so move on  */
 923                 base += 0x10;   /* Now, THIS is the real address */
 924                 if (base != 0x1f8) {
 925                         /* We didn't find it in the primary search */
 926                         if (get_pio_conf_PIO(base, buf)) {
 927                                 if (buf->FORCADR) {     /* If the address is forced */
 928                                         release_region(base, 9);
 929                                         continue;       /* we'll find it later      */
 930                                 }
 931
 932                                 /* OK. We made it till here, so we can go now
 933                                  * and register it. We  only have to check and
 934                                  * eventually remove it from the EISA and ISA list
 935                                  */
 936
 937                                 if (!register_pio_HBA(base, buf, dev)) {
 938                                         release_region(base, 9);
 939                                         continue;
 940                                 }
 941
 942                                 if (base < 0x1000) {
 943                                         for (x = 0; x < MAXISA; ++x) {
 944                                                 if (ISAbases[x] == base) {
 945                                                         ISAbases[x] = 0;
 946                                                         break;
 947                                                 }
 948                                         }
 949                                 } else if ((base & 0x0fff) == 0x0c88) {
 950                                         x = (base >> 12) & 0x0f;
 951                                         EISAbases[x] = 0;
 952                                 }
 953                         }
 954 #ifdef CHECK_BLINK
 955                         else if (check_blink_state(base)) {
 956                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 957                         }
 958 #endif
 959                 }
 960         }
 961 #endif                          /* #ifndef CONFIG_PCI */
 962 }
 963
 964 static int eata_pio_detect(struct scsi_host_template *tpnt)
 965 {
 966         struct Scsi_Host *HBA_ptr;
 967         struct get_conf gc;
 968         int i;
 969
 970         find_pio_PCI(&gc);
 971         find_pio_EISA(&gc);
 972         find_pio_ISA(&gc);
 973
 974         for (i = 0; i <= MAXIRQ; i++)
 975                 if (reg_IRQ[i])
 976                         request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
 977
 978         HBA_ptr = first_HBA;
 979
 980         if (registered_HBAs != 0) {
 981                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 982                        "(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);
 983
 984                 printk("Registered HBAs:\n");
 985                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 986                 for (i = 1; i <= registered_HBAs; i++) {
 987                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
 988                                "  %2d  %2d  %2d\n",
 989                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 990                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 991                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 992                                HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 993                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 994                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 995                         HBA_ptr = SD(HBA_ptr)->next;
 996                 }
 997         }
 998         return (registered_HBAs);
 999 }
1000
1001 static struct scsi_host_template driver_template = {
1002         .proc_name              = "eata_pio",
1003         .name                   = "EATA (Extended Attachment) PIO driver",
1004         .proc_info              = eata_pio_proc_info,
1005         .detect                 = eata_pio_detect,
1006         .release                = eata_pio_release,
1007         .queuecommand           = eata_pio_queue,
1008         .eh_abort_handler       = eata_pio_abort,
1009         .eh_host_reset_handler  = eata_pio_host_reset,
1010         .use_clustering         = ENABLE_CLUSTERING,
1011 };
1012
1013 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1014 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1015 MODULE_LICENSE("GPL");
1016
1017 #include "scsi_module.c"