git.oblomov.eu Git - linux-2.6/blob - 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 uint ISAbases[MAXISA] =  {
  75          0x1F0, 0x170, 0x330, 0x230
  76 };
  77
  78 static uint 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 uint 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         if (sh->irq && reg_IRQ[sh->irq] == 1)
 169                 free_irq(sh->irq, NULL);
 170         else
 171                 reg_IRQ[sh->irq]--;
 172         if (SD(sh)->channel == 0) {
 173                 if (sh->io_port && sh->n_io_port)
 174                         release_region(sh->io_port, sh->n_io_port);
 175         }
 176         return 1;
 177 }
 178
 179 static void IncStat(struct scsi_pointer *SCp, uint Increment)
 180 {
 181         SCp->ptr += Increment;
 182         if ((SCp->this_residual -= Increment) == 0) {
 183                 if ((--SCp->buffers_residual) == 0)
 184                         SCp->Status = 0;
 185                 else {
 186                         SCp->buffer++;
 187                         SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
 188                         SCp->this_residual = SCp->buffer->length;
 189                 }
 190         }
 191 }
 192
 193 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs);
 194
 195 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id,
 196                                                 struct pt_regs *regs)
 197 {
 198         unsigned long flags;
 199         struct Scsi_Host *dev = dev_id;
 200
 201         spin_lock_irqsave(dev->host_lock, flags);
 202         eata_pio_int_handler(irq, dev_id, regs);
 203         spin_unlock_irqrestore(dev->host_lock, flags);
 204         return IRQ_HANDLED;
 205 }
 206
 207 static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs)
 208 {
 209         uint eata_stat = 0xfffff;
 210         struct scsi_cmnd *cmd;
 211         hostdata *hd;
 212         struct eata_ccb *cp;
 213         uint base;
 214         uint x, z;
 215         struct Scsi_Host *sh;
 216         unsigned short zwickel = 0;
 217         unsigned char stat, odd;
 218
 219         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
 220         {
 221                 if (sh->irq != irq)
 222                         continue;
 223                 if (inb((uint) sh->base + HA_RSTATUS) & HA_SBUSY)
 224                         continue;
 225
 226                 int_counter++;
 227
 228                 hd = SD(sh);
 229
 230                 cp = &hd->ccb[0];
 231                 cmd = cp->cmd;
 232                 base = (uint) cmd->device->host->base;
 233
 234                 do {
 235                         stat = inb(base + HA_RSTATUS);
 236                         if (stat & HA_SDRQ) {
 237                                 if (cp->DataIn) {
 238                                         z = 256;
 239                                         odd = 0;
 240                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 241                                                 if (odd) {
 242                                                         *(cmd->SCp.ptr) = zwickel >> 8;
 243                                                         IncStat(&cmd->SCp, 1);
 244                                                         odd = 0;
 245                                                 }
 246                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 247                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
 248                                                 z -= x;
 249                                                 IncStat(&cmd->SCp, 2 * x);
 250                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 251                                                         zwickel = inw(base + HA_RDATA);
 252                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
 253                                                         IncStat(&cmd->SCp, 1);
 254                                                         z--;
 255                                                         odd = 1;
 256                                                 }
 257                                         }
 258                                         while (z > 0) {
 259                                                 zwickel = inw(base + HA_RDATA);
 260                                                 z--;
 261                                         }
 262                                 } else {        /* cp->DataOut */
 263
 264                                         odd = 0;
 265                                         z = 256;
 266                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 267                                                 if (odd) {
 268                                                         zwickel += *(cmd->SCp.ptr) << 8;
 269                                                         IncStat(&cmd->SCp, 1);
 270                                                         outw(zwickel, base + HA_RDATA);
 271                                                         z--;
 272                                                         odd = 0;
 273                                                 }
 274                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 275                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 276                                                 z -= x;
 277                                                 IncStat(&cmd->SCp, 2 * x);
 278                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 279                                                         zwickel = *(cmd->SCp.ptr);
 280                                                         zwickel &= 0xff;
 281                                                         IncStat(&cmd->SCp, 1);
 282                                                         odd = 1;
 283                                                 }
 284                                         }
 285                                         while (z > 0 || odd) {
 286                                                 outw(zwickel, base + HA_RDATA);
 287                                                 z--;
 288                                                 odd = 0;
 289                                         }
 290                                 }
 291                         }
 292                 }
 293                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 294
 295                 /* terminate handler if HBA goes busy again, i.e. transfers
 296                  * more data */
 297
 298                 if (stat & HA_SBUSY)
 299                         break;
 300
 301                 /* OK, this is quite stupid, but I haven't found any correct
 302                  * way to get HBA&SCSI status so far */
 303
 304                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 305                         cmd->result = (DID_OK << 16);
 306                         hd->devflags |= (1 << cp->cp_id);
 307                 } else if (hd->devflags & 1 << cp->cp_id)
 308                         cmd->result = (DID_OK << 16) + 0x02;
 309                 else
 310                         cmd->result = (DID_NO_CONNECT << 16);
 311
 312                 if (cp->status == LOCKED) {
 313                         cp->status = FREE;
 314                         eata_stat = inb(base + HA_RSTATUS);
 315                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 316                         return;
 317                 }
 318 #if DBG_INTR2
 319                 if (stat != 0x50)
 320                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 321 #endif
 322
 323                 cp->status = FREE;      /* now we can release the slot  */
 324
 325                 cmd->scsi_done(cmd);
 326         }
 327
 328         return;
 329 }
 330
 331 static inline uint eata_pio_send_command(uint base, unsigned char command)
 332 {
 333         uint loop = HZ / 2;
 334
 335         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 336                 if (--loop == 0)
 337                         return 1;
 338
 339         /* Enable interrupts for HBA.  It is not the best way to do it at this
 340          * place, but I hope that it doesn't interfere with the IDE driver
 341          * initialization this way */
 342
 343         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 344
 345         outb(command, base + HA_WCOMMAND);
 346         return 0;
 347 }
 348
 349 static int eata_pio_queue(struct scsi_cmnd *cmd,
 350                 void (*done)(struct scsi_cmnd *))
 351 {
 352         uint x, y;
 353         uint base;
 354
 355         hostdata *hd;
 356         struct Scsi_Host *sh;
 357         struct eata_ccb *cp;
 358
 359         queue_counter++;
 360
 361         hd = HD(cmd);
 362         sh = cmd->device->host;
 363         base = (uint) sh->base;
 364
 365         /* use only slot 0, as 2001 can handle only one cmd at a time */
 366
 367         y = x = 0;
 368
 369         if (hd->ccb[y].status != FREE) {
 370
 371                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 372 #if DEBUG_EATA
 373                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 374 #else
 375                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 376 #endif
 377         }
 378
 379         cp = &hd->ccb[y];
 380
 381         memset(cp, 0, sizeof(struct eata_ccb));
 382         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 383
 384         cp->status = USED;      /* claim free slot */
 385
 386         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 387                 "eata_pio_queue pid %ld, y %d\n",
 388                 cmd->pid, y));
 389
 390         cmd->scsi_done = (void *) done;
 391
 392         if (cmd->sc_data_direction == DMA_TO_DEVICE)
 393                 cp->DataOut = 1;        /* Output mode */
 394         else
 395                 cp->DataIn = 0; /* Input mode  */
 396
 397         cp->Interpret = (cmd->device->id == hd->hostid);
 398         cp->cp_datalen = htonl((unsigned long) cmd->request_bufflen);
 399         cp->Auto_Req_Sen = 0;
 400         cp->cp_reqDMA = htonl(0);
 401         cp->reqlen = 0;
 402
 403         cp->cp_id = cmd->device->id;
 404         cp->cp_lun = cmd->device->lun;
 405         cp->cp_dispri = 0;
 406         cp->cp_identify = 1;
 407         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 408
 409         cp->cp_statDMA = htonl(0);
 410
 411         cp->cp_viraddr = cp;
 412         cp->cmd = cmd;
 413         cmd->host_scribble = (char *) &hd->ccb[y];
 414
 415         if (cmd->use_sg == 0) {
 416                 cmd->SCp.buffers_residual = 1;
 417                 cmd->SCp.ptr = cmd->request_buffer;
 418                 cmd->SCp.this_residual = cmd->request_bufflen;
 419                 cmd->SCp.buffer = NULL;
 420         } else {
 421                 cmd->SCp.buffer = cmd->request_buffer;
 422                 cmd->SCp.buffers_residual = cmd->use_sg;
 423                 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
 424                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
 425         }
 426         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes
 427                                                                  * are to transfer */
 428
 429         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 430                 cmd->result = DID_BUS_BUSY << 16;
 431                 scmd_printk(KERN_NOTICE, cmd,
 432                         "eata_pio_queue pid %ld, HBA busy, "
 433                         "returning DID_BUS_BUSY, done.\n", cmd->pid);
 434                 done(cmd);
 435                 cp->status = FREE;
 436                 return (0);
 437         }
 438         /* FIXME: timeout */
 439         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 440                 cpu_relax();
 441         outsw(base + HA_RDATA, cp, hd->cplen);
 442         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 443         for (x = 0; x < hd->cppadlen; x++)
 444                 outw(0, base + HA_RDATA);
 445
 446         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 447                 "Queued base %#.4lx pid: %ld "
 448                 "slot %d irq %d\n", (long) sh->base, cmd->pid, y, sh->irq));
 449
 450         return (0);
 451 }
 452
 453 static int eata_pio_abort(struct scsi_cmnd *cmd)
 454 {
 455         uint loop = HZ;
 456
 457         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 458                 "eata_pio_abort called pid: %ld\n",
 459                 cmd->pid));
 460
 461         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 462                 if (--loop == 0) {
 463                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 464                         return FAILED;
 465                 }
 466         if (CD(cmd)->status == FREE) {
 467                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 468                 return FAILED;
 469         }
 470         if (CD(cmd)->status == USED) {
 471                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 472                 /* We want to sleep a bit more here */
 473                 return FAILED;          /* SNOOZE */
 474         }
 475         if (CD(cmd)->status == RESET) {
 476                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 477                 return FAILED;
 478         }
 479         if (CD(cmd)->status == LOCKED) {
 480                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 481                 return FAILED;
 482         }
 483         panic("eata_pio: abort: invalid slot status\n");
 484 }
 485
 486 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 487 {
 488         uint x, limit = 0;
 489         unsigned char success = 0;
 490         struct scsi_cmnd *sp;
 491         struct Scsi_Host *host = cmd->device->host;
 492
 493         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 494                 "eata_pio_reset called pid:%ld\n",
 495                 cmd->pid));
 496
 497         spin_lock_irq(host->host_lock);
 498
 499         if (HD(cmd)->state == RESET) {
 500                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 501                 spin_unlock_irq(host->host_lock);
 502                 return FAILED;
 503         }
 504
 505         /* force all slots to be free */
 506
 507         for (x = 0; x < cmd->device->host->can_queue; x++) {
 508
 509                 if (HD(cmd)->ccb[x].status == FREE)
 510                         continue;
 511
 512                 sp = HD(cmd)->ccb[x].cmd;
 513                 HD(cmd)->ccb[x].status = RESET;
 514                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 515
 516                 if (sp == NULL)
 517                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 518         }
 519
 520         /* hard reset the HBA  */
 521         outb(EATA_CMD_RESET, (uint) cmd->device->host->base + HA_WCOMMAND);
 522
 523         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 524         HD(cmd)->state = RESET;
 525
 526         spin_unlock_irq(host->host_lock);
 527         msleep(3000);
 528         spin_lock_irq(host->host_lock);
 529
 530         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 531
 532         for (x = 0; x < cmd->device->host->can_queue; x++) {
 533
 534                 /* Skip slots already set free by interrupt */
 535                 if (HD(cmd)->ccb[x].status != RESET)
 536                         continue;
 537
 538                 sp = HD(cmd)->ccb[x].cmd;
 539                 sp->result = DID_RESET << 16;
 540
 541                 /* This mailbox is terminated */
 542                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 543                 HD(cmd)->ccb[x].status = FREE;
 544
 545                 sp->scsi_done(sp);
 546         }
 547
 548         HD(cmd)->state = 0;
 549
 550         spin_unlock_irq(host->host_lock);
 551
 552         if (success) {          /* hmmm... */
 553                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 554                 return SUCCESS;
 555         } else {
 556                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 557                 return FAILED;
 558         }
 559 }
 560
 561 static char *get_pio_board_data(unsigned long base, uint irq, uint id, unsigned long cplen, unsigned short cppadlen)
 562 {
 563         struct eata_ccb cp;
 564         static char buff[256];
 565         int z;
 566
 567         memset(&cp, 0, sizeof(struct eata_ccb));
 568         memset(buff, 0, sizeof(buff));
 569
 570         cp.DataIn = 1;
 571         cp.Interpret = 1;       /* Interpret command */
 572
 573         cp.cp_datalen = htonl(254);
 574         cp.cp_dataDMA = htonl(0);
 575
 576         cp.cp_id = id;
 577         cp.cp_lun = 0;
 578
 579         cp.cp_cdb[0] = INQUIRY;
 580         cp.cp_cdb[1] = 0;
 581         cp.cp_cdb[2] = 0;
 582         cp.cp_cdb[3] = 0;
 583         cp.cp_cdb[4] = 254;
 584         cp.cp_cdb[5] = 0;
 585
 586         if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP))
 587                 return (NULL);
 588         while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 589         outsw(base + HA_RDATA, &cp, cplen);
 590         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 591         for (z = 0; z < cppadlen; z++)
 592                 outw(0, base + HA_RDATA);
 593
 594         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 595         if (inb(base + HA_RSTATUS) & HA_SERROR)
 596                 return (NULL);
 597         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 598                 return (NULL);
 599         else {
 600                 insw(base + HA_RDATA, &buff, 127);
 601                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
 602                         inw(base + HA_RDATA);
 603                 return (buff);
 604         }
 605 }
 606
 607 static int get_pio_conf_PIO(u32 base, struct get_conf *buf)
 608 {
 609         unsigned long loop = HZ / 2;
 610         int z;
 611         unsigned short *p;
 612
 613         if (!request_region(base, 9, "eata_pio"))
 614                 return 0;
 615
 616         memset(buf, 0, sizeof(struct get_conf));
 617
 618         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 619                 if (--loop == 0)
 620                         goto fail;
 621
 622         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#x\n", base));
 623         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 624
 625         loop = HZ / 2;
 626         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 627                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 628                         if (--loop == 0)
 629                                 goto fail;
 630
 631                 loop = HZ / 2;
 632                 *p = inw(base + HA_RDATA);
 633         }
 634         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 635                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 636                                         "transfer for HBA at %x\n", base));
 637                 goto fail;
 638         }
 639
 640         if (htonl(EATA_SIGNATURE) != buf->signature)
 641                 goto fail;
 642
 643         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 644                                 "at %#4x EATA Level: %x\n",
 645                                 base, (uint) (buf->version)));
 646
 647         while (inb(base + HA_RSTATUS) & HA_SDRQ)
 648                 inw(base + HA_RDATA);
 649
 650         if (!ALLOW_DMA_BOARDS) {
 651                 for (z = 0; z < MAXISA; z++)
 652                         if (base == ISAbases[z]) {
 653                                 buf->IRQ = ISAirqs[z];
 654                                 break;
 655                         }
 656         }
 657
 658         return 1;
 659
 660  fail:
 661         release_region(base, 9);
 662         return 0;
 663 }
 664
 665 static void print_pio_config(struct get_conf *gc)
 666 {
 667         printk("Please check values: (read config data)\n");
 668         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);
 669         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);
 670         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);
 671 }
 672
 673 static uint print_selftest(uint base)
 674 {
 675         unsigned char buffer[512];
 676 #ifdef VERBOSE_SETUP
 677         int z;
 678 #endif
 679
 680         printk("eata_pio: executing controller self test & setup...\n");
 681         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 682         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 683         do {
 684                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
 685                         /* nothing */ ;
 686                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 687                         insw(base + HA_RDATA, &buffer, 256);
 688 #ifdef VERBOSE_SETUP
 689                         /* no beeps please... */
 690                         for (z = 0; z < 511 && buffer[z]; z++)
 691                                 if (buffer[z] != 7)
 692                                         printk("%c", buffer[z]);
 693 #endif
 694                 }
 695         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 696
 697         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 698 }
 699
 700 static int register_pio_HBA(long base, struct get_conf *gc)
 701 {
 702         unsigned long size = 0;
 703         char *buff;
 704         unsigned long cplen;
 705         unsigned short cppadlen;
 706         struct Scsi_Host *sh;
 707         hostdata *hd;
 708
 709         DBG(DBG_REGISTER, print_pio_config(gc));
 710
 711         if (gc->DMA_support) {
 712                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 713                 if (!ALLOW_DMA_BOARDS)
 714                         return 0;
 715         }
 716
 717         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) {
 718                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (unsigned long) base);
 719                 return 0;
 720         }
 721
 722         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 723                 printk("HBA at %#lx failed while performing self test & setup.\n", (unsigned long) base);
 724                 return 0;
 725         }
 726
 727         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
 728
 729         sh = scsi_register(&driver_template, size);
 730         if (sh == NULL)
 731                 return 0;
 732
 733         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 734                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
 735                         reg_IRQ[gc->IRQ]++;
 736                         if (!gc->IRQ_TR)
 737                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 738                 } else {
 739                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 740                         return 0;
 741                 }
 742         } else {                /* More than one HBA on this IRQ */
 743                 if (reg_IRQL[gc->IRQ]) {
 744                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 745                         return 0;
 746                 } else
 747                         reg_IRQ[gc->IRQ]++;
 748         }
 749
 750         hd = SD(sh);
 751
 752         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
 753         memset(hd->reads, 0, sizeof(unsigned long) * 26);
 754
 755         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 756         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 757         SD(sh)->revision[0] = buff[32];
 758         SD(sh)->revision[1] = buff[33];
 759         SD(sh)->revision[2] = buff[34];
 760         SD(sh)->revision[3] = '.';
 761         SD(sh)->revision[4] = buff[35];
 762         SD(sh)->revision[5] = 0;
 763
 764         switch (ntohl(gc->len)) {
 765         case 0x1c:
 766                 SD(sh)->EATA_revision = 'a';
 767                 break;
 768         case 0x1e:
 769                 SD(sh)->EATA_revision = 'b';
 770                 break;
 771         case 0x22:
 772                 SD(sh)->EATA_revision = 'c';
 773                 break;
 774         case 0x24:
 775                 SD(sh)->EATA_revision = 'z';
 776         default:
 777                 SD(sh)->EATA_revision = '?';
 778         }
 779
 780         if (ntohl(gc->len) >= 0x22) {
 781                 if (gc->is_PCI)
 782                         hd->bustype = IS_PCI;
 783                 else if (gc->is_EISA)
 784                         hd->bustype = IS_EISA;
 785                 else
 786                         hd->bustype = IS_ISA;
 787         } else {
 788                 if (buff[21] == '4')
 789                         hd->bustype = IS_PCI;
 790                 else if (buff[21] == '2')
 791                         hd->bustype = IS_EISA;
 792                 else
 793                         hd->bustype = IS_ISA;
 794         }
 795
 796         SD(sh)->cplen = cplen;
 797         SD(sh)->cppadlen = cppadlen;
 798         SD(sh)->hostid = gc->scsi_id[3];
 799         SD(sh)->devflags = 1 << gc->scsi_id[3];
 800         SD(sh)->moresupport = gc->MORE_support;
 801         sh->unique_id = base;
 802         sh->base = base;
 803         sh->io_port = base;
 804         sh->n_io_port = 9;
 805         sh->irq = gc->IRQ;
 806         sh->dma_channel = PIO;
 807         sh->this_id = gc->scsi_id[3];
 808         sh->can_queue = 1;
 809         sh->cmd_per_lun = 1;
 810         sh->sg_tablesize = SG_ALL;
 811
 812         hd->channel = 0;
 813
 814         sh->max_id = 8;
 815         sh->max_lun = 8;
 816
 817         if (gc->SECOND)
 818                 hd->primary = 0;
 819         else
 820                 hd->primary = 1;
 821
 822         sh->unchecked_isa_dma = 0;      /* We can only do PIO */
 823
 824         hd->next = NULL;        /* build a linked list of all HBAs */
 825         hd->prev = last_HBA;
 826         if (hd->prev != NULL)
 827                 SD(hd->prev)->next = sh;
 828         last_HBA = sh;
 829         if (first_HBA == NULL)
 830                 first_HBA = sh;
 831         registered_HBAs++;
 832         return (1);
 833 }
 834
 835 static void find_pio_ISA(struct get_conf *buf)
 836 {
 837         int i;
 838
 839         for (i = 0; i < MAXISA; i++) {
 840                 if (!ISAbases[i])
 841                         continue;
 842                 if (!get_pio_conf_PIO(ISAbases[i], buf))
 843                         continue;
 844                 if (!register_pio_HBA(ISAbases[i], buf))
 845                         release_region(ISAbases[i], 9);
 846                 else
 847                         ISAbases[i] = 0;
 848         }
 849         return;
 850 }
 851
 852 static void find_pio_EISA(struct get_conf *buf)
 853 {
 854         u32 base;
 855         int i;
 856
 857 #ifdef CHECKPAL
 858         u8 pal1, pal2, pal3;
 859 #endif
 860
 861         for (i = 0; i < MAXEISA; i++) {
 862                 if (EISAbases[i]) {     /* Still a possibility ?          */
 863
 864                         base = 0x1c88 + (i * 0x1000);
 865 #ifdef CHECKPAL
 866                         pal1 = inb((u16) base - 8);
 867                         pal2 = inb((u16) base - 7);
 868                         pal3 = inb((u16) base - 6);
 869
 870                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 871                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 872 #endif
 873                                 if (get_pio_conf_PIO(base, buf)) {
 874                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 875                                         if (buf->IRQ) {
 876                                                 if (!register_pio_HBA(base, buf))
 877                                                         release_region(base, 9);
 878                                         } else {
 879                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 880                                                 release_region(base, 9);
 881                                         }
 882                                 }
 883                                 /* Nothing found here so we take it from the list */
 884                                 EISAbases[i] = 0;
 885 #ifdef CHECKPAL
 886                         }
 887 #endif
 888                 }
 889         }
 890         return;
 891 }
 892
 893 static void find_pio_PCI(struct get_conf *buf)
 894 {
 895 #ifndef CONFIG_PCI
 896         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 897 #else
 898         struct pci_dev *dev = NULL;
 899         u32 base, x;
 900
 901         while ((dev = pci_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 902                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 903                 if (pci_enable_device(dev))
 904                         continue;
 905                 pci_set_master(dev);
 906                 base = pci_resource_flags(dev, 0);
 907                 if (base & IORESOURCE_MEM) {
 908                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 909                         continue;
 910                 }
 911                 base = pci_resource_start(dev, 0);
 912                 /* EISA tag there ? */
 913                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 914                         continue;       /* Jep, it's forced, so move on  */
 915                 base += 0x10;   /* Now, THIS is the real address */
 916                 if (base != 0x1f8) {
 917                         /* We didn't find it in the primary search */
 918                         if (get_pio_conf_PIO(base, buf)) {
 919                                 if (buf->FORCADR) {     /* If the address is forced */
 920                                         release_region(base, 9);
 921                                         continue;       /* we'll find it later      */
 922                                 }
 923
 924                                 /* OK. We made it till here, so we can go now
 925                                  * and register it. We  only have to check and
 926                                  * eventually remove it from the EISA and ISA list
 927                                  */
 928
 929                                 if (!register_pio_HBA(base, buf)) {
 930                                         release_region(base, 9);
 931                                         continue;
 932                                 }
 933
 934                                 if (base < 0x1000) {
 935                                         for (x = 0; x < MAXISA; ++x) {
 936                                                 if (ISAbases[x] == base) {
 937                                                         ISAbases[x] = 0;
 938                                                         break;
 939                                                 }
 940                                         }
 941                                 } else if ((base & 0x0fff) == 0x0c88) {
 942                                         x = (base >> 12) & 0x0f;
 943                                         EISAbases[x] = 0;
 944                                 }
 945                         }
 946 #ifdef CHECK_BLINK
 947                         else if (check_blink_state(base)) {
 948                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 949                         }
 950 #endif
 951                 }
 952         }
 953 #endif                          /* #ifndef CONFIG_PCI */
 954 }
 955
 956 static int eata_pio_detect(struct scsi_host_template *tpnt)
 957 {
 958         struct Scsi_Host *HBA_ptr;
 959         struct get_conf gc;
 960         int i;
 961
 962         find_pio_PCI(&gc);
 963         find_pio_EISA(&gc);
 964         find_pio_ISA(&gc);
 965
 966         for (i = 0; i <= MAXIRQ; i++)
 967                 if (reg_IRQ[i])
 968                         request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
 969
 970         HBA_ptr = first_HBA;
 971
 972         if (registered_HBAs != 0) {
 973                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 974                        "(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);
 975
 976                 printk("Registered HBAs:\n");
 977                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 978                 for (i = 1; i <= registered_HBAs; i++) {
 979                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4x   %2d   %d   %d   %c"
 980                                "  %2d  %2d  %2d\n",
 981                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 982                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 983                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 984                                (uint) HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 985                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 986                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 987                         HBA_ptr = SD(HBA_ptr)->next;
 988                 }
 989         }
 990         return (registered_HBAs);
 991 }
 992
 993 static struct scsi_host_template driver_template = {
 994         .proc_name              = "eata_pio",
 995         .name                   = "EATA (Extended Attachment) PIO driver",
 996         .proc_info              = eata_pio_proc_info,
 997         .detect                 = eata_pio_detect,
 998         .release                = eata_pio_release,
 999         .queuecommand           = eata_pio_queue,
1000         .eh_abort_handler       = eata_pio_abort,
1001         .eh_host_reset_handler  = eata_pio_host_reset,
1002         .use_clustering         = ENABLE_CLUSTERING,
1003 };
1004
1005 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1006 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1007 MODULE_LICENSE("GPL");
1008
1009 #include "scsi_module.c"