drivers/scsi/eata_pio.c

   1 /************************************************************
   2  *                                                          *
   3  *               Linux EATA SCSI PIO driver                 *
   4  *                                                          *
   5  *  based on the CAM document CAM/89-004 rev. 2.0c,         *
   6  *  DPT's driver kit, some internal documents and source,   *
   7  *  and several other Linux scsi drivers and kernel docs.   *
   8  *                                                          *
   9  *  The driver currently:                                   *
  10  *      -supports all EATA-PIO boards                       *
  11  *      -only supports DASD devices                         *
  12  *                                                          *
  13  *  (c)1993-96 Michael Neuffer, Alfred Arnold               *
  14  *             neuffer@goofy.zdv.uni-mainz.de               *
  15  *             a.arnold@kfa-juelich.de                      *
  16  *                                                          *
  17  *  Updated 2002 by Alan Cox <alan@redhat.com> for Linux    *
  18  *  2.5.x and the newer locking and error handling          *
  19  *                                                          *
  20  *  This program is free software; you can redistribute it  *
  21  *  and/or modify it under the terms of the GNU General     *
  22  *  Public License as published by the Free Software        *
  23  *  Foundation; either version 2 of the License, or         *
  24  *  (at your option) any later version.                     *
  25  *                                                          *
  26  *  This program is distributed in the hope that it will be *
  27  *  useful, but WITHOUT ANY WARRANTY; without even the      *
  28  *  implied warranty of MERCHANTABILITY or FITNESS FOR A    *
  29  *  PARTICULAR PURPOSE.  See the GNU General Public License *
  30  *  for more details.                                       *
  31  *                                                          *
  32  *  You should have received a copy of the GNU General      *
  33  *  Public License along with this kernel; if not, write to *
  34  *  the Free Software Foundation, Inc., 675 Mass Ave,       *
  35  *  Cambridge, MA 02139, USA.                               *
  36  *                                                          *
  37  *  For the avoidance of doubt the "preferred form" of this *
  38  *  code is one which is in an open non patent encumbered   *
  39  *  format. Where cryptographic key signing forms part of   *
  40  *  the process of creating an executable the information   *
  41  *  including keys needed to generate an equivalently       *
  42  *  functional executable are deemed to be part of the      *
  43  *  source code are deemed to be part of the source code.   *
  44  *                                                          *
  45  ************************************************************
  46  *  last change: 2002/11/02               OS: Linux 2.5.45  *
  47  ************************************************************/
  48
  49 #include <linux/config.h>
  50 #include <linux/module.h>
  51 #include <linux/kernel.h>
  52 #include <linux/sched.h>
  53 #include <linux/string.h>
  54 #include <linux/ioport.h>
  55 #include <linux/slab.h>
  56 #include <linux/in.h>
  57 #include <linux/pci.h>
  58 #include <linux/proc_fs.h>
  59 #include <linux/interrupt.h>
  60 #include <linux/blkdev.h>
  61 #include <linux/spinlock.h>
  62 #include <asm/io.h>
  63
  64 #include <scsi/scsi.h>
  65 #include <scsi/scsi_cmnd.h>
  66 #include <scsi/scsi_device.h>
  67 #include <scsi/scsi_host.h>
  68
  69 #include "eata_generic.h"
  70 #include "eata_pio.h"
  71
  72
  73 static uint ISAbases[MAXISA] =  {
  74          0x1F0, 0x170, 0x330, 0x230
  75 };
  76
  77 static uint ISAirqs[MAXISA] = {
  78         14, 12, 15, 11
  79 };
  80
  81 static unsigned char EISAbases[] = {
  82         1, 1, 1, 1, 1, 1, 1, 1,
  83         1, 1, 1, 1, 1, 1, 1, 1
  84 };
  85
  86 static uint registered_HBAs;
  87 static struct Scsi_Host *last_HBA;
  88 static struct Scsi_Host *first_HBA;
  89 static unsigned char reg_IRQ[16];
  90 static unsigned char reg_IRQL[16];
  91 static unsigned long int_counter;
  92 static unsigned long queue_counter;
  93
  94 static struct scsi_host_template driver_template;
  95
  96 /*
  97  * eata_proc_info
  98  * inout : decides on the direction of the dataflow and the meaning of the
  99  *         variables
 100  * buffer: If inout==FALSE data is being written to it else read from it
 101  * *start: If inout==FALSE start of the valid data in the buffer
 102  * offset: If inout==FALSE offset from the beginning of the imaginary file
 103  *         from which we start writing into the buffer
 104  * length: If inout==FALSE max number of bytes to be written into the buffer
 105  *         else number of bytes in the buffer
 106  */
 107 static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
 108                               int length, int rw)
 109 {
 110     static u8 buff[512];
 111     int size, len = 0;
 112     off_t begin = 0, pos = 0;
 113
 114     if (rw)
 115         return -ENOSYS;
 116     if (offset == 0)
 117         memset(buff, 0, sizeof(buff));
 118
 119     size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
 120                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
 121     len += size; pos = begin + len;
 122     size = sprintf(buffer + len, "queued commands:     %10ld\n"
 123                    "processed interrupts:%10ld\n", queue_counter, int_counter);
 124     len += size; pos = begin + len;
 125
 126     size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
 127                    shost->host_no, SD(shost)->name);
 128     len += size;
 129     pos = begin + len;
 130     size = sprintf(buffer + len, "Firmware revision: v%s\n",
 131                    SD(shost)->revision);
 132     len += size;
 133     pos = begin + len;
 134     size = sprintf(buffer + len, "IO: PIO\n");
 135     len += size;
 136     pos = begin + len;
 137     size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
 138     len += size;
 139     pos = begin + len;
 140     size = sprintf(buffer + len, "Host Bus: %s\n",
 141                    (SD(shost)->bustype == 'P')?"PCI ":
 142                    (SD(shost)->bustype == 'E')?"EISA":"ISA ");
 143
 144     len += size;
 145     pos = begin + len;
 146
 147     if (pos < offset) {
 148         len = 0;
 149         begin = pos;
 150     }
 151     if (pos > offset + length)
 152         goto stop_output;
 153
 154  stop_output:
 155     DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
 156     *start=buffer+(offset-begin);   /* Start of wanted data */
 157     len-=(offset-begin);            /* Start slop */
 158     if(len>length)
 159         len = length;               /* Ending slop */
 160     DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
 161
 162     return (len);
 163 }
 164
 165 static int eata_pio_release(struct Scsi_Host *sh)
 166 {
 167         if (sh->irq && reg_IRQ[sh->irq] == 1)
 168                 free_irq(sh->irq, NULL);
 169         else
 170                 reg_IRQ[sh->irq]--;
 171         if (SD(sh)->channel == 0) {
 172                 if (sh->io_port && sh->n_io_port)
 173                         release_region(sh->io_port, sh->n_io_port);
 174         }
 175         return 1;
 176 }
 177
 178 static void IncStat(struct scsi_pointer *SCp, uint Increment)
 179 {
 180         SCp->ptr += Increment;
 181         if ((SCp->this_residual -= Increment) == 0) {
 182                 if ((--SCp->buffers_residual) == 0)
 183                         SCp->Status = 0;
 184                 else {
 185                         SCp->buffer++;
 186                         SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
 187                         SCp->this_residual = SCp->buffer->length;
 188                 }
 189         }
 190 }
 191
 192 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs);
 193
 194 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id,
 195                                                 struct pt_regs *regs)
 196 {
 197         unsigned long flags;
 198         struct Scsi_Host *dev = dev_id;
 199
 200         spin_lock_irqsave(dev->host_lock, flags);
 201         eata_pio_int_handler(irq, dev_id, regs);
 202         spin_unlock_irqrestore(dev->host_lock, flags);
 203         return IRQ_HANDLED;
 204 }
 205
 206 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs)
 207 {
 208         uint eata_stat = 0xfffff;
 209         struct scsi_cmnd *cmd;
 210         hostdata *hd;
 211         struct eata_ccb *cp;
 212         uint base;
 213         uint x, z;
 214         struct Scsi_Host *sh;
 215         unsigned short zwickel = 0;
 216         unsigned char stat, odd;
 217
 218         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
 219         {
 220                 if (sh->irq != irq)
 221                         continue;
 222                 if (inb((uint) sh->base + HA_RSTATUS) & HA_SBUSY)
 223                         continue;
 224
 225                 int_counter++;
 226
 227                 hd = SD(sh);
 228
 229                 cp = &hd->ccb[0];
 230                 cmd = cp->cmd;
 231                 base = (uint) cmd->device->host->base;
 232
 233                 do {
 234                         stat = inb(base + HA_RSTATUS);
 235                         if (stat & HA_SDRQ) {
 236                                 if (cp->DataIn) {
 237                                         z = 256;
 238                                         odd = 0;
 239                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 240                                                 if (odd) {
 241                                                         *(cmd->SCp.ptr) = zwickel >> 8;
 242                                                         IncStat(&cmd->SCp, 1);
 243                                                         odd = 0;
 244                                                 }
 245                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 246                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
 247                                                 z -= x;
 248                                                 IncStat(&cmd->SCp, 2 * x);
 249                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 250                                                         zwickel = inw(base + HA_RDATA);
 251                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
 252                                                         IncStat(&cmd->SCp, 1);
 253                                                         z--;
 254                                                         odd = 1;
 255                                                 }
 256                                         }
 257                                         while (z > 0) {
 258                                                 zwickel = inw(base + HA_RDATA);
 259                                                 z--;
 260                                         }
 261                                 } else {        /* cp->DataOut */
 262
 263                                         odd = 0;
 264                                         z = 256;
 265                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 266                                                 if (odd) {
 267                                                         zwickel += *(cmd->SCp.ptr) << 8;
 268                                                         IncStat(&cmd->SCp, 1);
 269                                                         outw(zwickel, base + HA_RDATA);
 270                                                         z--;
 271                                                         odd = 0;
 272                                                 }
 273                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 274                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 275                                                 z -= x;
 276                                                 IncStat(&cmd->SCp, 2 * x);
 277                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 278                                                         zwickel = *(cmd->SCp.ptr);
 279                                                         zwickel &= 0xff;
 280                                                         IncStat(&cmd->SCp, 1);
 281                                                         odd = 1;
 282                                                 }
 283                                         }
 284                                         while (z > 0 || odd) {
 285                                                 outw(zwickel, base + HA_RDATA);
 286                                                 z--;
 287                                                 odd = 0;
 288                                         }
 289                                 }
 290                         }
 291                 }
 292                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 293
 294                 /* terminate handler if HBA goes busy again, i.e. transfers
 295                  * more data */
 296
 297                 if (stat & HA_SBUSY)
 298                         break;
 299
 300                 /* OK, this is quite stupid, but I haven't found any correct
 301                  * way to get HBA&SCSI status so far */
 302
 303                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 304                         cmd->result = (DID_OK << 16);
 305                         hd->devflags |= (1 << cp->cp_id);
 306                 } else if (hd->devflags & 1 << cp->cp_id)
 307                         cmd->result = (DID_OK << 16) + 0x02;
 308                 else
 309                         cmd->result = (DID_NO_CONNECT << 16);
 310
 311                 if (cp->status == LOCKED) {
 312                         cp->status = FREE;
 313                         eata_stat = inb(base + HA_RSTATUS);
 314                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 315                         return;
 316                 }
 317 #if DBG_INTR2
 318                 if (stat != 0x50)
 319                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 320 #endif
 321
 322                 cp->status = FREE;      /* now we can release the slot  */
 323
 324                 cmd->scsi_done(cmd);
 325         }
 326
 327         return;
 328 }
 329
 330 static inline uint eata_pio_send_command(uint base, unsigned char command)
 331 {
 332         uint loop = HZ / 2;
 333
 334         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 335                 if (--loop == 0)
 336                         return 1;
 337
 338         /* Enable interrupts for HBA.  It is not the best way to do it at this
 339          * place, but I hope that it doesn't interfere with the IDE driver
 340          * initialization this way */
 341
 342         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 343
 344         outb(command, base + HA_WCOMMAND);
 345         return 0;
 346 }
 347
 348 static int eata_pio_queue(struct scsi_cmnd *cmd,
 349                 void (*done)(struct scsi_cmnd *))
 350 {
 351         uint x, y;
 352         uint base;
 353
 354         hostdata *hd;
 355         struct Scsi_Host *sh;
 356         struct eata_ccb *cp;
 357
 358         queue_counter++;
 359
 360         hd = HD(cmd);
 361         sh = cmd->device->host;
 362         base = (uint) sh->base;
 363
 364         /* use only slot 0, as 2001 can handle only one cmd at a time */
 365
 366         y = x = 0;
 367
 368         if (hd->ccb[y].status != FREE) {
 369
 370                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 371 #if DEBUG_EATA
 372                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 373 #else
 374                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 375 #endif
 376         }
 377
 378         cp = &hd->ccb[y];
 379
 380         memset(cp, 0, sizeof(struct eata_ccb));
 381         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 382
 383         cp->status = USED;      /* claim free slot */
 384
 385         DBG(DBG_QUEUE, printk(KERN_DEBUG "eata_pio_queue pid %ld, target: %x, lun:" " %x, y %d\n", cmd->pid, cmd->device->id, cmd->device->lun, y));
 386
 387         cmd->scsi_done = (void *) done;
 388
 389         if (cmd->sc_data_direction == DMA_TO_DEVICE)
 390                 cp->DataOut = 1;        /* Output mode */
 391         else
 392                 cp->DataIn = 0; /* Input mode  */
 393
 394         cp->Interpret = (cmd->device->id == hd->hostid);
 395         cp->cp_datalen = htonl((unsigned long) cmd->request_bufflen);
 396         cp->Auto_Req_Sen = 0;
 397         cp->cp_reqDMA = htonl(0);
 398         cp->reqlen = 0;
 399
 400         cp->cp_id = cmd->device->id;
 401         cp->cp_lun = cmd->device->lun;
 402         cp->cp_dispri = 0;
 403         cp->cp_identify = 1;
 404         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 405
 406         cp->cp_statDMA = htonl(0);
 407
 408         cp->cp_viraddr = cp;
 409         cp->cmd = cmd;
 410         cmd->host_scribble = (char *) &hd->ccb[y];
 411
 412         if (cmd->use_sg == 0) {
 413                 cmd->SCp.buffers_residual = 1;
 414                 cmd->SCp.ptr = cmd->request_buffer;
 415                 cmd->SCp.this_residual = cmd->request_bufflen;
 416                 cmd->SCp.buffer = NULL;
 417         } else {
 418                 cmd->SCp.buffer = cmd->request_buffer;
 419                 cmd->SCp.buffers_residual = cmd->use_sg;
 420                 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
 421                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
 422         }
 423         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes
 424                                                                  * are to transfer */
 425
 426         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 427                 cmd->result = DID_BUS_BUSY << 16;
 428                 printk(KERN_NOTICE "eata_pio_queue target %d, pid %ld, HBA busy, " "returning DID_BUS_BUSY, done.\n", cmd->device->id, cmd->pid);
 429                 done(cmd);
 430                 cp->status = FREE;
 431                 return (0);
 432         }
 433         /* FIXME: timeout */
 434         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 435                 cpu_relax();
 436         outsw(base + HA_RDATA, cp, hd->cplen);
 437         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 438         for (x = 0; x < hd->cppadlen; x++)
 439                 outw(0, base + HA_RDATA);
 440
 441         DBG(DBG_QUEUE, printk(KERN_DEBUG "Queued base %#.4lx pid: %ld target: %x " "lun: %x slot %d irq %d\n", (long) sh->base, cmd->pid, cmd->device->id, cmd->device->lun, y, sh->irq));
 442
 443         return (0);
 444 }
 445
 446 static int eata_pio_abort(struct scsi_cmnd *cmd)
 447 {
 448         uint loop = HZ;
 449
 450         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_abort called pid: %ld " "target: %x lun: %x reason %x\n", cmd->pid, cmd->device->id, cmd->device->lun, cmd->abort_reason));
 451
 452
 453         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 454                 if (--loop == 0) {
 455                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 456                         return FAILED;
 457                 }
 458         if (CD(cmd)->status == FREE) {
 459                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 460                 return FAILED;
 461         }
 462         if (CD(cmd)->status == USED) {
 463                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 464                 /* We want to sleep a bit more here */
 465                 return FAILED;          /* SNOOZE */
 466         }
 467         if (CD(cmd)->status == RESET) {
 468                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 469                 return FAILED;
 470         }
 471         if (CD(cmd)->status == LOCKED) {
 472                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 473                 return FAILED;
 474         }
 475         panic("eata_pio: abort: invalid slot status\n");
 476 }
 477
 478 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 479 {
 480         uint x, limit = 0;
 481         unsigned char success = 0;
 482         struct scsi_cmnd *sp;
 483         struct Scsi_Host *host = cmd->device->host;
 484
 485         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset called pid:%ld target:" " %x lun: %x reason %x\n", cmd->pid, cmd->device->id, cmd->device->lun, cmd->abort_reason));
 486
 487         if (HD(cmd)->state == RESET) {
 488                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 489                 return FAILED;
 490         }
 491
 492         /* force all slots to be free */
 493
 494         for (x = 0; x < cmd->device->host->can_queue; x++) {
 495
 496                 if (HD(cmd)->ccb[x].status == FREE)
 497                         continue;
 498
 499                 sp = HD(cmd)->ccb[x].cmd;
 500                 HD(cmd)->ccb[x].status = RESET;
 501                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 502
 503                 if (sp == NULL)
 504                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 505         }
 506
 507         /* hard reset the HBA  */
 508         outb(EATA_CMD_RESET, (uint) cmd->device->host->base + HA_WCOMMAND);
 509
 510         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 511         HD(cmd)->state = RESET;
 512
 513         spin_unlock_irq(host->host_lock);
 514         set_current_state(TASK_UNINTERRUPTIBLE);
 515         schedule_timeout(3 * HZ);
 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         if (success) {          /* hmmm... */
 539                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 540                 return SUCCESS;
 541         } else {
 542                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 543                 return FAILED;
 544         }
 545 }
 546
 547 static char *get_pio_board_data(unsigned long base, uint irq, uint id, unsigned long cplen, unsigned short cppadlen)
 548 {
 549         struct eata_ccb cp;
 550         static char buff[256];
 551         int z;
 552
 553         memset(&cp, 0, sizeof(struct eata_ccb));
 554         memset(buff, 0, sizeof(buff));
 555
 556         cp.DataIn = 1;
 557         cp.Interpret = 1;       /* Interpret command */
 558
 559         cp.cp_datalen = htonl(254);
 560         cp.cp_dataDMA = htonl(0);
 561
 562         cp.cp_id = id;
 563         cp.cp_lun = 0;
 564
 565         cp.cp_cdb[0] = INQUIRY;
 566         cp.cp_cdb[1] = 0;
 567         cp.cp_cdb[2] = 0;
 568         cp.cp_cdb[3] = 0;
 569         cp.cp_cdb[4] = 254;
 570         cp.cp_cdb[5] = 0;
 571
 572         if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP))
 573                 return (NULL);
 574         while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 575         outsw(base + HA_RDATA, &cp, cplen);
 576         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 577         for (z = 0; z < cppadlen; z++)
 578                 outw(0, base + HA_RDATA);
 579
 580         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 581         if (inb(base + HA_RSTATUS) & HA_SERROR)
 582                 return (NULL);
 583         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 584                 return (NULL);
 585         else {
 586                 insw(base + HA_RDATA, &buff, 127);
 587                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
 588                         inw(base + HA_RDATA);
 589                 return (buff);
 590         }
 591 }
 592
 593 static int get_pio_conf_PIO(u32 base, struct get_conf *buf)
 594 {
 595         unsigned long loop = HZ / 2;
 596         int z;
 597         unsigned short *p;
 598
 599         if (!request_region(base, 9, "eata_pio"))
 600                 return 0;
 601
 602         memset(buf, 0, sizeof(struct get_conf));
 603
 604         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 605                 if (--loop == 0)
 606                         goto fail;
 607
 608         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#x\n", base));
 609         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 610
 611         loop = HZ / 2;
 612         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 613                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 614                         if (--loop == 0)
 615                                 goto fail;
 616
 617                 loop = HZ / 2;
 618                 *p = inw(base + HA_RDATA);
 619         }
 620         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 621                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 622                                         "transfer for HBA at %x\n", base));
 623                 goto fail;
 624         }
 625
 626         if (htonl(EATA_SIGNATURE) != buf->signature)
 627                 goto fail;
 628
 629         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 630                                 "at %#4x EATA Level: %x\n",
 631                                 base, (uint) (buf->version)));
 632
 633         while (inb(base + HA_RSTATUS) & HA_SDRQ)
 634                 inw(base + HA_RDATA);
 635
 636         if (!ALLOW_DMA_BOARDS) {
 637                 for (z = 0; z < MAXISA; z++)
 638                         if (base == ISAbases[z]) {
 639                                 buf->IRQ = ISAirqs[z];
 640                                 break;
 641                         }
 642         }
 643
 644         return 1;
 645
 646  fail:
 647         release_region(base, 9);
 648         return 0;
 649 }
 650
 651 static void print_pio_config(struct get_conf *gc)
 652 {
 653         printk("Please check values: (read config data)\n");
 654         printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", (uint) ntohl(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
 655         printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n", gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2], gc->scsi_id[1], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
 656         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);
 657 }
 658
 659 static uint print_selftest(uint base)
 660 {
 661         unsigned char buffer[512];
 662 #ifdef VERBOSE_SETUP
 663         int z;
 664 #endif
 665
 666         printk("eata_pio: executing controller self test & setup...\n");
 667         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 668         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 669         do {
 670                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
 671                         /* nothing */ ;
 672                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 673                         insw(base + HA_RDATA, &buffer, 256);
 674 #ifdef VERBOSE_SETUP
 675                         /* no beeps please... */
 676                         for (z = 0; z < 511 && buffer[z]; z++)
 677                                 if (buffer[z] != 7)
 678                                         printk("%c", buffer[z]);
 679 #endif
 680                 }
 681         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 682
 683         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 684 }
 685
 686 static int register_pio_HBA(long base, struct get_conf *gc)
 687 {
 688         unsigned long size = 0;
 689         char *buff;
 690         unsigned long cplen;
 691         unsigned short cppadlen;
 692         struct Scsi_Host *sh;
 693         hostdata *hd;
 694
 695         DBG(DBG_REGISTER, print_pio_config(gc));
 696
 697         if (gc->DMA_support) {
 698                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 699                 if (!ALLOW_DMA_BOARDS)
 700                         return 0;
 701         }
 702
 703         if ((buff = get_pio_board_data((uint) base, gc->IRQ, gc->scsi_id[3], cplen = (htonl(gc->cplen) + 1) / 2, cppadlen = (htons(gc->cppadlen) + 1) / 2)) == NULL) {
 704                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (unsigned long) base);
 705                 return 0;
 706         }
 707
 708         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 709                 printk("HBA at %#lx failed while performing self test & setup.\n", (unsigned long) base);
 710                 return 0;
 711         }
 712
 713         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
 714
 715         sh = scsi_register(&driver_template, size);
 716         if (sh == NULL)
 717                 return 0;
 718
 719         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 720                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", sh)) {
 721                         reg_IRQ[gc->IRQ]++;
 722                         if (!gc->IRQ_TR)
 723                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 724                 } else {
 725                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 726                         return 0;
 727                 }
 728         } else {                /* More than one HBA on this IRQ */
 729                 if (reg_IRQL[gc->IRQ]) {
 730                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 731                         return 0;
 732                 } else
 733                         reg_IRQ[gc->IRQ]++;
 734         }
 735
 736         hd = SD(sh);
 737
 738         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
 739         memset(hd->reads, 0, sizeof(unsigned long) * 26);
 740
 741         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 742         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 743         SD(sh)->revision[0] = buff[32];
 744         SD(sh)->revision[1] = buff[33];
 745         SD(sh)->revision[2] = buff[34];
 746         SD(sh)->revision[3] = '.';
 747         SD(sh)->revision[4] = buff[35];
 748         SD(sh)->revision[5] = 0;
 749
 750         switch (ntohl(gc->len)) {
 751         case 0x1c:
 752                 SD(sh)->EATA_revision = 'a';
 753                 break;
 754         case 0x1e:
 755                 SD(sh)->EATA_revision = 'b';
 756                 break;
 757         case 0x22:
 758                 SD(sh)->EATA_revision = 'c';
 759                 break;
 760         case 0x24:
 761                 SD(sh)->EATA_revision = 'z';
 762         default:
 763                 SD(sh)->EATA_revision = '?';
 764         }
 765
 766         if (ntohl(gc->len) >= 0x22) {
 767                 if (gc->is_PCI)
 768                         hd->bustype = IS_PCI;
 769                 else if (gc->is_EISA)
 770                         hd->bustype = IS_EISA;
 771                 else
 772                         hd->bustype = IS_ISA;
 773         } else {
 774                 if (buff[21] == '4')
 775                         hd->bustype = IS_PCI;
 776                 else if (buff[21] == '2')
 777                         hd->bustype = IS_EISA;
 778                 else
 779                         hd->bustype = IS_ISA;
 780         }
 781
 782         SD(sh)->cplen = cplen;
 783         SD(sh)->cppadlen = cppadlen;
 784         SD(sh)->hostid = gc->scsi_id[3];
 785         SD(sh)->devflags = 1 << gc->scsi_id[3];
 786         SD(sh)->moresupport = gc->MORE_support;
 787         sh->unique_id = base;
 788         sh->base = base;
 789         sh->io_port = base;
 790         sh->n_io_port = 9;
 791         sh->irq = gc->IRQ;
 792         sh->dma_channel = PIO;
 793         sh->this_id = gc->scsi_id[3];
 794         sh->can_queue = 1;
 795         sh->cmd_per_lun = 1;
 796         sh->sg_tablesize = SG_ALL;
 797
 798         hd->channel = 0;
 799
 800         sh->max_id = 8;
 801         sh->max_lun = 8;
 802
 803         if (gc->SECOND)
 804                 hd->primary = 0;
 805         else
 806                 hd->primary = 1;
 807
 808         sh->unchecked_isa_dma = 0;      /* We can only do PIO */
 809
 810         hd->next = NULL;        /* build a linked list of all HBAs */
 811         hd->prev = last_HBA;
 812         if (hd->prev != NULL)
 813                 SD(hd->prev)->next = sh;
 814         last_HBA = sh;
 815         if (first_HBA == NULL)
 816                 first_HBA = sh;
 817         registered_HBAs++;
 818         return (1);
 819 }
 820
 821 static void find_pio_ISA(struct get_conf *buf)
 822 {
 823         int i;
 824
 825         for (i = 0; i < MAXISA; i++) {
 826                 if (!ISAbases[i])
 827                         continue;
 828                 if (!get_pio_conf_PIO(ISAbases[i], buf))
 829                         continue;
 830                 if (!register_pio_HBA(ISAbases[i], buf))
 831                         release_region(ISAbases[i], 9);
 832                 else
 833                         ISAbases[i] = 0;
 834         }
 835         return;
 836 }
 837
 838 static void find_pio_EISA(struct get_conf *buf)
 839 {
 840         u32 base;
 841         int i;
 842
 843 #ifdef CHECKPAL
 844         u8 pal1, pal2, pal3;
 845 #endif
 846
 847         for (i = 0; i < MAXEISA; i++) {
 848                 if (EISAbases[i]) {     /* Still a possibility ?          */
 849
 850                         base = 0x1c88 + (i * 0x1000);
 851 #ifdef CHECKPAL
 852                         pal1 = inb((u16) base - 8);
 853                         pal2 = inb((u16) base - 7);
 854                         pal3 = inb((u16) base - 6);
 855
 856                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 857                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 858 #endif
 859                                 if (get_pio_conf_PIO(base, buf)) {
 860                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 861                                         if (buf->IRQ) {
 862                                                 if (!register_pio_HBA(base, buf))
 863                                                         release_region(base, 9);
 864                                         } else {
 865                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 866                                                 release_region(base, 9);
 867                                         }
 868                                 }
 869                                 /* Nothing found here so we take it from the list */
 870                                 EISAbases[i] = 0;
 871 #ifdef CHECKPAL
 872                         }
 873 #endif
 874                 }
 875         }
 876         return;
 877 }
 878
 879 static void find_pio_PCI(struct get_conf *buf)
 880 {
 881 #ifndef CONFIG_PCI
 882         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 883 #else
 884         struct pci_dev *dev = NULL;
 885         u32 base, x;
 886
 887         while ((dev = pci_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 888                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 889                 if (pci_enable_device(dev))
 890                         continue;
 891                 pci_set_master(dev);
 892                 base = pci_resource_flags(dev, 0);
 893                 if (base & IORESOURCE_MEM) {
 894                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 895                         continue;
 896                 }
 897                 base = pci_resource_start(dev, 0);
 898                 /* EISA tag there ? */
 899                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 900                         continue;       /* Jep, it's forced, so move on  */
 901                 base += 0x10;   /* Now, THIS is the real address */
 902                 if (base != 0x1f8) {
 903                         /* We didn't find it in the primary search */
 904                         if (get_pio_conf_PIO(base, buf)) {
 905                                 if (buf->FORCADR) {     /* If the address is forced */
 906                                         release_region(base, 9);
 907                                         continue;       /* we'll find it later      */
 908                                 }
 909
 910                                 /* OK. We made it till here, so we can go now
 911                                  * and register it. We  only have to check and
 912                                  * eventually remove it from the EISA and ISA list
 913                                  */
 914
 915                                 if (!register_pio_HBA(base, buf)) {
 916                                         release_region(base, 9);
 917                                         continue;
 918                                 }
 919
 920                                 if (base < 0x1000) {
 921                                         for (x = 0; x < MAXISA; ++x) {
 922                                                 if (ISAbases[x] == base) {
 923                                                         ISAbases[x] = 0;
 924                                                         break;
 925                                                 }
 926                                         }
 927                                 } else if ((base & 0x0fff) == 0x0c88) {
 928                                         x = (base >> 12) & 0x0f;
 929                                         EISAbases[x] = 0;
 930                                 }
 931                         }
 932 #ifdef CHECK_BLINK
 933                         else if (check_blink_state(base)) {
 934                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 935                         }
 936 #endif
 937                 }
 938         }
 939 #endif                          /* #ifndef CONFIG_PCI */
 940 }
 941
 942 static int eata_pio_detect(struct scsi_host_template *tpnt)
 943 {
 944         struct Scsi_Host *HBA_ptr;
 945         struct get_conf gc;
 946         int i;
 947
 948         find_pio_PCI(&gc);
 949         find_pio_EISA(&gc);
 950         find_pio_ISA(&gc);
 951
 952         for (i = 0; i <= MAXIRQ; i++)
 953                 if (reg_IRQ[i])
 954                         request_irq(i, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", NULL);
 955
 956         HBA_ptr = first_HBA;
 957
 958         if (registered_HBAs != 0) {
 959                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 960                        "(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);
 961
 962                 printk("Registered HBAs:\n");
 963                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 964                 for (i = 1; i <= registered_HBAs; i++) {
 965                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4x   %2d   %d   %d   %c"
 966                                "  %2d  %2d  %2d\n",
 967                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 968                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 969                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 970                                (uint) HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 971                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 972                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 973                         HBA_ptr = SD(HBA_ptr)->next;
 974                 }
 975         }
 976         return (registered_HBAs);
 977 }
 978
 979 static struct scsi_host_template driver_template = {
 980         .proc_name              = "eata_pio",
 981         .name                   = "EATA (Extended Attachment) PIO driver",
 982         .proc_info              = eata_pio_proc_info,
 983         .detect                 = eata_pio_detect,
 984         .release                = eata_pio_release,
 985         .queuecommand           = eata_pio_queue,
 986         .eh_abort_handler       = eata_pio_abort,
 987         .eh_host_reset_handler  = eata_pio_host_reset,
 988         .use_clustering         = ENABLE_CLUSTERING,
 989 };
 990
 991 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
 992 MODULE_DESCRIPTION("EATA SCSI PIO driver");
 993 MODULE_LICENSE("GPL");
 994
 995 #include "scsi_module.c"