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, struct pt_regs *regs);
 198
 199 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id,
 200                                                 struct pt_regs *regs)
 201 {
 202         unsigned long flags;
 203         struct Scsi_Host *dev = dev_id;
 204         irqreturn_t ret;
 205
 206         spin_lock_irqsave(dev->host_lock, flags);
 207         ret = eata_pio_int_handler(irq, dev_id, regs);
 208         spin_unlock_irqrestore(dev->host_lock, flags);
 209         return ret;
 210 }
 211
 212 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs)
 213 {
 214         unsigned int eata_stat = 0xfffff;
 215         struct scsi_cmnd *cmd;
 216         hostdata *hd;
 217         struct eata_ccb *cp;
 218         unsigned long base;
 219         unsigned int x, z;
 220         struct Scsi_Host *sh;
 221         unsigned short zwickel = 0;
 222         unsigned char stat, odd;
 223         irqreturn_t ret = IRQ_NONE;
 224
 225         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
 226         {
 227                 if (sh->irq != irq)
 228                         continue;
 229                 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
 230                         continue;
 231
 232                 int_counter++;
 233                 ret = IRQ_HANDLED;
 234
 235                 hd = SD(sh);
 236
 237                 cp = &hd->ccb[0];
 238                 cmd = cp->cmd;
 239                 base = cmd->device->host->base;
 240
 241                 do {
 242                         stat = inb(base + HA_RSTATUS);
 243                         if (stat & HA_SDRQ) {
 244                                 if (cp->DataIn) {
 245                                         z = 256;
 246                                         odd = 0;
 247                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 248                                                 if (odd) {
 249                                                         *(cmd->SCp.ptr) = zwickel >> 8;
 250                                                         IncStat(&cmd->SCp, 1);
 251                                                         odd = 0;
 252                                                 }
 253                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 254                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
 255                                                 z -= x;
 256                                                 IncStat(&cmd->SCp, 2 * x);
 257                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 258                                                         zwickel = inw(base + HA_RDATA);
 259                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
 260                                                         IncStat(&cmd->SCp, 1);
 261                                                         z--;
 262                                                         odd = 1;
 263                                                 }
 264                                         }
 265                                         while (z > 0) {
 266                                                 zwickel = inw(base + HA_RDATA);
 267                                                 z--;
 268                                         }
 269                                 } else {        /* cp->DataOut */
 270
 271                                         odd = 0;
 272                                         z = 256;
 273                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 274                                                 if (odd) {
 275                                                         zwickel += *(cmd->SCp.ptr) << 8;
 276                                                         IncStat(&cmd->SCp, 1);
 277                                                         outw(zwickel, base + HA_RDATA);
 278                                                         z--;
 279                                                         odd = 0;
 280                                                 }
 281                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 282                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 283                                                 z -= x;
 284                                                 IncStat(&cmd->SCp, 2 * x);
 285                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 286                                                         zwickel = *(cmd->SCp.ptr);
 287                                                         zwickel &= 0xff;
 288                                                         IncStat(&cmd->SCp, 1);
 289                                                         odd = 1;
 290                                                 }
 291                                         }
 292                                         while (z > 0 || odd) {
 293                                                 outw(zwickel, base + HA_RDATA);
 294                                                 z--;
 295                                                 odd = 0;
 296                                         }
 297                                 }
 298                         }
 299                 }
 300                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 301
 302                 /* terminate handler if HBA goes busy again, i.e. transfers
 303                  * more data */
 304
 305                 if (stat & HA_SBUSY)
 306                         break;
 307
 308                 /* OK, this is quite stupid, but I haven't found any correct
 309                  * way to get HBA&SCSI status so far */
 310
 311                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 312                         cmd->result = (DID_OK << 16);
 313                         hd->devflags |= (1 << cp->cp_id);
 314                 } else if (hd->devflags & (1 << cp->cp_id))
 315                         cmd->result = (DID_OK << 16) + 0x02;
 316                 else
 317                         cmd->result = (DID_NO_CONNECT << 16);
 318
 319                 if (cp->status == LOCKED) {
 320                         cp->status = FREE;
 321                         eata_stat = inb(base + HA_RSTATUS);
 322                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 323                         return ret;
 324                 }
 325 #if DBG_INTR2
 326                 if (stat != 0x50)
 327                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 328 #endif
 329
 330                 cp->status = FREE;      /* now we can release the slot  */
 331
 332                 cmd->scsi_done(cmd);
 333         }
 334
 335         return ret;
 336 }
 337
 338 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
 339 {
 340         unsigned int loop = 50;
 341
 342         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 343                 if (--loop == 0)
 344                         return 1;
 345
 346         /* Enable interrupts for HBA.  It is not the best way to do it at this
 347          * place, but I hope that it doesn't interfere with the IDE driver
 348          * initialization this way */
 349
 350         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 351
 352         outb(command, base + HA_WCOMMAND);
 353         return 0;
 354 }
 355
 356 static int eata_pio_queue(struct scsi_cmnd *cmd,
 357                 void (*done)(struct scsi_cmnd *))
 358 {
 359         unsigned int x, y;
 360         unsigned long base;
 361
 362         hostdata *hd;
 363         struct Scsi_Host *sh;
 364         struct eata_ccb *cp;
 365
 366         queue_counter++;
 367
 368         hd = HD(cmd);
 369         sh = cmd->device->host;
 370         base = sh->base;
 371
 372         /* use only slot 0, as 2001 can handle only one cmd at a time */
 373
 374         y = x = 0;
 375
 376         if (hd->ccb[y].status != FREE) {
 377
 378                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 379 #if DEBUG_EATA
 380                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 381 #else
 382                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 383 #endif
 384         }
 385
 386         cp = &hd->ccb[y];
 387
 388         memset(cp, 0, sizeof(struct eata_ccb));
 389         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 390
 391         cp->status = USED;      /* claim free slot */
 392
 393         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 394                 "eata_pio_queue pid %ld, y %d\n",
 395                 cmd->pid, y));
 396
 397         cmd->scsi_done = (void *) done;
 398
 399         if (cmd->sc_data_direction == DMA_TO_DEVICE)
 400                 cp->DataOut = 1;        /* Output mode */
 401         else
 402                 cp->DataIn = 0; /* Input mode  */
 403
 404         cp->Interpret = (cmd->device->id == hd->hostid);
 405         cp->cp_datalen = cpu_to_be32(cmd->request_bufflen);
 406         cp->Auto_Req_Sen = 0;
 407         cp->cp_reqDMA = 0;
 408         cp->reqlen = 0;
 409
 410         cp->cp_id = cmd->device->id;
 411         cp->cp_lun = cmd->device->lun;
 412         cp->cp_dispri = 0;
 413         cp->cp_identify = 1;
 414         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 415
 416         cp->cp_statDMA = 0;
 417
 418         cp->cp_viraddr = cp;
 419         cp->cmd = cmd;
 420         cmd->host_scribble = (char *) &hd->ccb[y];
 421
 422         if (cmd->use_sg == 0) {
 423                 cmd->SCp.buffers_residual = 1;
 424                 cmd->SCp.ptr = cmd->request_buffer;
 425                 cmd->SCp.this_residual = cmd->request_bufflen;
 426                 cmd->SCp.buffer = NULL;
 427         } else {
 428                 cmd->SCp.buffer = cmd->request_buffer;
 429                 cmd->SCp.buffers_residual = cmd->use_sg;
 430                 cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
 431                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
 432         }
 433         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes
 434                                                                  * are to transfer */
 435
 436         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 437                 cmd->result = DID_BUS_BUSY << 16;
 438                 scmd_printk(KERN_NOTICE, cmd,
 439                         "eata_pio_queue pid %ld, HBA busy, "
 440                         "returning DID_BUS_BUSY, done.\n", cmd->pid);
 441                 done(cmd);
 442                 cp->status = FREE;
 443                 return (0);
 444         }
 445         /* FIXME: timeout */
 446         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 447                 cpu_relax();
 448         outsw(base + HA_RDATA, cp, hd->cplen);
 449         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 450         for (x = 0; x < hd->cppadlen; x++)
 451                 outw(0, base + HA_RDATA);
 452
 453         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 454                 "Queued base %#.4lx pid: %ld "
 455                 "slot %d irq %d\n", sh->base, cmd->pid, y, sh->irq));
 456
 457         return (0);
 458 }
 459
 460 static int eata_pio_abort(struct scsi_cmnd *cmd)
 461 {
 462         unsigned int loop = 100;
 463
 464         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 465                 "eata_pio_abort called pid: %ld\n",
 466                 cmd->pid));
 467
 468         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 469                 if (--loop == 0) {
 470                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 471                         return FAILED;
 472                 }
 473         if (CD(cmd)->status == FREE) {
 474                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 475                 return FAILED;
 476         }
 477         if (CD(cmd)->status == USED) {
 478                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 479                 /* We want to sleep a bit more here */
 480                 return FAILED;          /* SNOOZE */
 481         }
 482         if (CD(cmd)->status == RESET) {
 483                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 484                 return FAILED;
 485         }
 486         if (CD(cmd)->status == LOCKED) {
 487                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 488                 return FAILED;
 489         }
 490         panic("eata_pio: abort: invalid slot status\n");
 491 }
 492
 493 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 494 {
 495         unsigned int x, limit = 0;
 496         unsigned char success = 0;
 497         struct scsi_cmnd *sp;
 498         struct Scsi_Host *host = cmd->device->host;
 499
 500         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 501                 "eata_pio_reset called pid:%ld\n",
 502                 cmd->pid));
 503
 504         spin_lock_irq(host->host_lock);
 505
 506         if (HD(cmd)->state == RESET) {
 507                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 508                 spin_unlock_irq(host->host_lock);
 509                 return FAILED;
 510         }
 511
 512         /* force all slots to be free */
 513
 514         for (x = 0; x < cmd->device->host->can_queue; x++) {
 515
 516                 if (HD(cmd)->ccb[x].status == FREE)
 517                         continue;
 518
 519                 sp = HD(cmd)->ccb[x].cmd;
 520                 HD(cmd)->ccb[x].status = RESET;
 521                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 522
 523                 if (sp == NULL)
 524                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 525         }
 526
 527         /* hard reset the HBA  */
 528         outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
 529
 530         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 531         HD(cmd)->state = RESET;
 532
 533         spin_unlock_irq(host->host_lock);
 534         msleep(3000);
 535         spin_lock_irq(host->host_lock);
 536
 537         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 538
 539         for (x = 0; x < cmd->device->host->can_queue; x++) {
 540
 541                 /* Skip slots already set free by interrupt */
 542                 if (HD(cmd)->ccb[x].status != RESET)
 543                         continue;
 544
 545                 sp = HD(cmd)->ccb[x].cmd;
 546                 sp->result = DID_RESET << 16;
 547
 548                 /* This mailbox is terminated */
 549                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 550                 HD(cmd)->ccb[x].status = FREE;
 551
 552                 sp->scsi_done(sp);
 553         }
 554
 555         HD(cmd)->state = 0;
 556
 557         spin_unlock_irq(host->host_lock);
 558
 559         if (success) {          /* hmmm... */
 560                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 561                 return SUCCESS;
 562         } else {
 563                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 564                 return FAILED;
 565         }
 566 }
 567
 568 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
 569 {
 570         struct eata_ccb cp;
 571         static char buff[256];
 572         int z;
 573
 574         memset(&cp, 0, sizeof(struct eata_ccb));
 575         memset(buff, 0, sizeof(buff));
 576
 577         cp.DataIn = 1;
 578         cp.Interpret = 1;       /* Interpret command */
 579
 580         cp.cp_datalen = cpu_to_be32(254);
 581         cp.cp_dataDMA = cpu_to_be32(0);
 582
 583         cp.cp_id = id;
 584         cp.cp_lun = 0;
 585
 586         cp.cp_cdb[0] = INQUIRY;
 587         cp.cp_cdb[1] = 0;
 588         cp.cp_cdb[2] = 0;
 589         cp.cp_cdb[3] = 0;
 590         cp.cp_cdb[4] = 254;
 591         cp.cp_cdb[5] = 0;
 592
 593         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
 594                 return (NULL);
 595         while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
 596         outsw(base + HA_RDATA, &cp, cplen);
 597         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 598         for (z = 0; z < cppadlen; z++)
 599                 outw(0, base + HA_RDATA);
 600
 601         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 602         if (inb(base + HA_RSTATUS) & HA_SERROR)
 603                 return (NULL);
 604         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 605                 return (NULL);
 606         else {
 607                 insw(base + HA_RDATA, &buff, 127);
 608                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
 609                         inw(base + HA_RDATA);
 610                 return (buff);
 611         }
 612 }
 613
 614 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
 615 {
 616         unsigned long loop = HZ / 2;
 617         int z;
 618         unsigned short *p;
 619
 620         if (!request_region(base, 9, "eata_pio"))
 621                 return 0;
 622
 623         memset(buf, 0, sizeof(struct get_conf));
 624
 625         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 626                 if (--loop == 0)
 627                         goto fail;
 628
 629         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
 630         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 631
 632         loop = 50;
 633         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 634                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 635                         if (--loop == 0)
 636                                 goto fail;
 637
 638                 loop = 50;
 639                 *p = inw(base + HA_RDATA);
 640         }
 641         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 642                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 643                                         "transfer for HBA at %lx\n", base));
 644                 goto fail;
 645         }
 646
 647         if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
 648                 goto fail;
 649
 650         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 651                                 "at %#4lx EATA Level: %x\n",
 652                                 base, (unsigned int) (buf->version)));
 653
 654         while (inb(base + HA_RSTATUS) & HA_SDRQ)
 655                 inw(base + HA_RDATA);
 656
 657         if (!ALLOW_DMA_BOARDS) {
 658                 for (z = 0; z < MAXISA; z++)
 659                         if (base == ISAbases[z]) {
 660                                 buf->IRQ = ISAirqs[z];
 661                                 break;
 662                         }
 663         }
 664
 665         return 1;
 666
 667  fail:
 668         release_region(base, 9);
 669         return 0;
 670 }
 671
 672 static void print_pio_config(struct get_conf *gc)
 673 {
 674         printk("Please check values: (read config data)\n");
 675         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);
 676         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);
 677         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);
 678 }
 679
 680 static unsigned int print_selftest(unsigned int base)
 681 {
 682         unsigned char buffer[512];
 683 #ifdef VERBOSE_SETUP
 684         int z;
 685 #endif
 686
 687         printk("eata_pio: executing controller self test & setup...\n");
 688         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 689         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 690         do {
 691                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
 692                         /* nothing */ ;
 693                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 694                         insw(base + HA_RDATA, &buffer, 256);
 695 #ifdef VERBOSE_SETUP
 696                         /* no beeps please... */
 697                         for (z = 0; z < 511 && buffer[z]; z++)
 698                                 if (buffer[z] != 7)
 699                                         printk("%c", buffer[z]);
 700 #endif
 701                 }
 702         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 703
 704         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 705 }
 706
 707 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
 708 {
 709         unsigned long size = 0;
 710         char *buff;
 711         unsigned long cplen;
 712         unsigned short cppadlen;
 713         struct Scsi_Host *sh;
 714         hostdata *hd;
 715
 716         DBG(DBG_REGISTER, print_pio_config(gc));
 717
 718         if (gc->DMA_support) {
 719                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 720                 if (!ALLOW_DMA_BOARDS)
 721                         return 0;
 722         }
 723
 724         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) {
 725                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
 726                 return 0;
 727         }
 728
 729         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 730                 printk("HBA at %#lx failed while performing self test & setup.\n", base);
 731                 return 0;
 732         }
 733
 734         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
 735
 736         sh = scsi_register(&driver_template, size);
 737         if (sh == NULL)
 738                 return 0;
 739
 740         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 741                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
 742                         reg_IRQ[gc->IRQ]++;
 743                         if (!gc->IRQ_TR)
 744                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 745                 } else {
 746                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 747                         return 0;
 748                 }
 749         } else {                /* More than one HBA on this IRQ */
 750                 if (reg_IRQL[gc->IRQ]) {
 751                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 752                         return 0;
 753                 } else
 754                         reg_IRQ[gc->IRQ]++;
 755         }
 756
 757         hd = SD(sh);
 758
 759         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
 760         memset(hd->reads, 0, sizeof(hd->reads));
 761
 762         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 763         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 764         SD(sh)->revision[0] = buff[32];
 765         SD(sh)->revision[1] = buff[33];
 766         SD(sh)->revision[2] = buff[34];
 767         SD(sh)->revision[3] = '.';
 768         SD(sh)->revision[4] = buff[35];
 769         SD(sh)->revision[5] = 0;
 770
 771         switch (be32_to_cpu(gc->len)) {
 772         case 0x1c:
 773                 SD(sh)->EATA_revision = 'a';
 774                 break;
 775         case 0x1e:
 776                 SD(sh)->EATA_revision = 'b';
 777                 break;
 778         case 0x22:
 779                 SD(sh)->EATA_revision = 'c';
 780                 break;
 781         case 0x24:
 782                 SD(sh)->EATA_revision = 'z';
 783         default:
 784                 SD(sh)->EATA_revision = '?';
 785         }
 786
 787         if (be32_to_cpu(gc->len) >= 0x22) {
 788                 if (gc->is_PCI)
 789                         hd->bustype = IS_PCI;
 790                 else if (gc->is_EISA)
 791                         hd->bustype = IS_EISA;
 792                 else
 793                         hd->bustype = IS_ISA;
 794         } else {
 795                 if (buff[21] == '4')
 796                         hd->bustype = IS_PCI;
 797                 else if (buff[21] == '2')
 798                         hd->bustype = IS_EISA;
 799                 else
 800                         hd->bustype = IS_ISA;
 801         }
 802
 803         SD(sh)->cplen = cplen;
 804         SD(sh)->cppadlen = cppadlen;
 805         SD(sh)->hostid = gc->scsi_id[3];
 806         SD(sh)->devflags = 1 << gc->scsi_id[3];
 807         SD(sh)->moresupport = gc->MORE_support;
 808         sh->unique_id = base;
 809         sh->base = base;
 810         sh->io_port = base;
 811         sh->n_io_port = 9;
 812         sh->irq = gc->IRQ;
 813         sh->dma_channel = PIO;
 814         sh->this_id = gc->scsi_id[3];
 815         sh->can_queue = 1;
 816         sh->cmd_per_lun = 1;
 817         sh->sg_tablesize = SG_ALL;
 818
 819         hd->channel = 0;
 820
 821         hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
 822
 823         sh->max_id = 8;
 824         sh->max_lun = 8;
 825
 826         if (gc->SECOND)
 827                 hd->primary = 0;
 828         else
 829                 hd->primary = 1;
 830
 831         sh->unchecked_isa_dma = 0;      /* We can only do PIO */
 832
 833         hd->next = NULL;        /* build a linked list of all HBAs */
 834         hd->prev = last_HBA;
 835         if (hd->prev != NULL)
 836                 SD(hd->prev)->next = sh;
 837         last_HBA = sh;
 838         if (first_HBA == NULL)
 839                 first_HBA = sh;
 840         registered_HBAs++;
 841         return (1);
 842 }
 843
 844 static void find_pio_ISA(struct get_conf *buf)
 845 {
 846         int i;
 847
 848         for (i = 0; i < MAXISA; i++) {
 849                 if (!ISAbases[i])
 850                         continue;
 851                 if (!get_pio_conf_PIO(ISAbases[i], buf))
 852                         continue;
 853                 if (!register_pio_HBA(ISAbases[i], buf, NULL))
 854                         release_region(ISAbases[i], 9);
 855                 else
 856                         ISAbases[i] = 0;
 857         }
 858         return;
 859 }
 860
 861 static void find_pio_EISA(struct get_conf *buf)
 862 {
 863         u32 base;
 864         int i;
 865
 866 #ifdef CHECKPAL
 867         u8 pal1, pal2, pal3;
 868 #endif
 869
 870         for (i = 0; i < MAXEISA; i++) {
 871                 if (EISAbases[i]) {     /* Still a possibility ?          */
 872
 873                         base = 0x1c88 + (i * 0x1000);
 874 #ifdef CHECKPAL
 875                         pal1 = inb((u16) base - 8);
 876                         pal2 = inb((u16) base - 7);
 877                         pal3 = inb((u16) base - 6);
 878
 879                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 880                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 881 #endif
 882                                 if (get_pio_conf_PIO(base, buf)) {
 883                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 884                                         if (buf->IRQ) {
 885                                                 if (!register_pio_HBA(base, buf, NULL))
 886                                                         release_region(base, 9);
 887                                         } else {
 888                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 889                                                 release_region(base, 9);
 890                                         }
 891                                 }
 892                                 /* Nothing found here so we take it from the list */
 893                                 EISAbases[i] = 0;
 894 #ifdef CHECKPAL
 895                         }
 896 #endif
 897                 }
 898         }
 899         return;
 900 }
 901
 902 static void find_pio_PCI(struct get_conf *buf)
 903 {
 904 #ifndef CONFIG_PCI
 905         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 906 #else
 907         struct pci_dev *dev = NULL;
 908         unsigned long base, x;
 909
 910         while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 911                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 912                 if (pci_enable_device(dev))
 913                         continue;
 914                 pci_set_master(dev);
 915                 base = pci_resource_flags(dev, 0);
 916                 if (base & IORESOURCE_MEM) {
 917                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 918                         continue;
 919                 }
 920                 base = pci_resource_start(dev, 0);
 921                 /* EISA tag there ? */
 922                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 923                         continue;       /* Jep, it's forced, so move on  */
 924                 base += 0x10;   /* Now, THIS is the real address */
 925                 if (base != 0x1f8) {
 926                         /* We didn't find it in the primary search */
 927                         if (get_pio_conf_PIO(base, buf)) {
 928                                 if (buf->FORCADR) {     /* If the address is forced */
 929                                         release_region(base, 9);
 930                                         continue;       /* we'll find it later      */
 931                                 }
 932
 933                                 /* OK. We made it till here, so we can go now
 934                                  * and register it. We  only have to check and
 935                                  * eventually remove it from the EISA and ISA list
 936                                  */
 937
 938                                 if (!register_pio_HBA(base, buf, dev)) {
 939                                         release_region(base, 9);
 940                                         continue;
 941                                 }
 942
 943                                 if (base < 0x1000) {
 944                                         for (x = 0; x < MAXISA; ++x) {
 945                                                 if (ISAbases[x] == base) {
 946                                                         ISAbases[x] = 0;
 947                                                         break;
 948                                                 }
 949                                         }
 950                                 } else if ((base & 0x0fff) == 0x0c88) {
 951                                         x = (base >> 12) & 0x0f;
 952                                         EISAbases[x] = 0;
 953                                 }
 954                         }
 955 #ifdef CHECK_BLINK
 956                         else if (check_blink_state(base)) {
 957                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 958                         }
 959 #endif
 960                 }
 961         }
 962 #endif                          /* #ifndef CONFIG_PCI */
 963 }
 964
 965 static int eata_pio_detect(struct scsi_host_template *tpnt)
 966 {
 967         struct Scsi_Host *HBA_ptr;
 968         struct get_conf gc;
 969         int i;
 970
 971         find_pio_PCI(&gc);
 972         find_pio_EISA(&gc);
 973         find_pio_ISA(&gc);
 974
 975         for (i = 0; i <= MAXIRQ; i++)
 976                 if (reg_IRQ[i])
 977                         request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
 978
 979         HBA_ptr = first_HBA;
 980
 981         if (registered_HBAs != 0) {
 982                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 983                        "(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);
 984
 985                 printk("Registered HBAs:\n");
 986                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 987                 for (i = 1; i <= registered_HBAs; i++) {
 988                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
 989                                "  %2d  %2d  %2d\n",
 990                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 991                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 992                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 993                                HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 994                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 995                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 996                         HBA_ptr = SD(HBA_ptr)->next;
 997                 }
 998         }
 999         return (registered_HBAs);
1000 }
1001
1002 static struct scsi_host_template driver_template = {
1003         .proc_name              = "eata_pio",
1004         .name                   = "EATA (Extended Attachment) PIO driver",
1005         .proc_info              = eata_pio_proc_info,
1006         .detect                 = eata_pio_detect,
1007         .release                = eata_pio_release,
1008         .queuecommand           = eata_pio_queue,
1009         .eh_abort_handler       = eata_pio_abort,
1010         .eh_host_reset_handler  = eata_pio_host_reset,
1011         .use_clustering         = ENABLE_CLUSTERING,
1012 };
1013
1014 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1015 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1016 MODULE_LICENSE("GPL");
1017
1018 #include "scsi_module.c"