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/string.h>
  52 #include <linux/ioport.h>
  53 #include <linux/slab.h>
  54 #include <linux/in.h>
  55 #include <linux/pci.h>
  56 #include <linux/proc_fs.h>
  57 #include <linux/interrupt.h>
  58 #include <linux/blkdev.h>
  59 #include <linux/spinlock.h>
  60 #include <linux/delay.h>
  61
  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 unsigned int ISAbases[MAXISA] =  {
  74          0x1F0, 0x170, 0x330, 0x230
  75 };
  76
  77 static unsigned int 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 unsigned int 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         int len = 0;
 111         off_t begin = 0, pos = 0;
 112
 113         if (rw)
 114                 return -ENOSYS;
 115
 116         len += sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
 117                    "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
 118         len += sprintf(buffer + len, "queued commands:     %10ld\n"
 119                    "processed interrupts:%10ld\n", queue_counter, int_counter);
 120         len += sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
 121                    shost->host_no, SD(shost)->name);
 122         len += sprintf(buffer + len, "Firmware revision: v%s\n",
 123                    SD(shost)->revision);
 124         len += sprintf(buffer + len, "IO: PIO\n");
 125         len += sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
 126         len += sprintf(buffer + len, "Host Bus: %s\n",
 127                    (SD(shost)->bustype == 'P')?"PCI ":
 128                    (SD(shost)->bustype == 'E')?"EISA":"ISA ");
 129
 130         pos = begin + len;
 131
 132         if (pos < offset) {
 133                 len = 0;
 134                 begin = pos;
 135         }
 136         if (pos > offset + length)
 137                 goto stop_output;
 138
 139 stop_output:
 140         DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
 141         *start = buffer + (offset - begin);   /* Start of wanted data */
 142         len -= (offset - begin);            /* Start slop */
 143         if (len > length)
 144                 len = length;               /* Ending slop */
 145         DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
 146
 147         return len;
 148 }
 149
 150 static int eata_pio_release(struct Scsi_Host *sh)
 151 {
 152         hostdata *hd = SD(sh);
 153         if (sh->irq && reg_IRQ[sh->irq] == 1)
 154                 free_irq(sh->irq, NULL);
 155         else
 156                 reg_IRQ[sh->irq]--;
 157         if (SD(sh)->channel == 0) {
 158                 if (sh->io_port && sh->n_io_port)
 159                         release_region(sh->io_port, sh->n_io_port);
 160         }
 161         /* At this point the PCI reference can go */
 162         if (hd->pdev)
 163                 pci_dev_put(hd->pdev);
 164         return 1;
 165 }
 166
 167 static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
 168 {
 169         SCp->ptr += Increment;
 170         if ((SCp->this_residual -= Increment) == 0) {
 171                 if ((--SCp->buffers_residual) == 0)
 172                         SCp->Status = 0;
 173                 else {
 174                         SCp->buffer++;
 175                         SCp->ptr = sg_virt(SCp->buffer);
 176                         SCp->this_residual = SCp->buffer->length;
 177                 }
 178         }
 179 }
 180
 181 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
 182
 183 static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
 184 {
 185         unsigned long flags;
 186         struct Scsi_Host *dev = dev_id;
 187         irqreturn_t ret;
 188
 189         spin_lock_irqsave(dev->host_lock, flags);
 190         ret = eata_pio_int_handler(irq, dev_id);
 191         spin_unlock_irqrestore(dev->host_lock, flags);
 192         return ret;
 193 }
 194
 195 static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
 196 {
 197         unsigned int eata_stat = 0xfffff;
 198         struct scsi_cmnd *cmd;
 199         hostdata *hd;
 200         struct eata_ccb *cp;
 201         unsigned long base;
 202         unsigned int x, z;
 203         struct Scsi_Host *sh;
 204         unsigned short zwickel = 0;
 205         unsigned char stat, odd;
 206         irqreturn_t ret = IRQ_NONE;
 207
 208         for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
 209         {
 210                 if (sh->irq != irq)
 211                         continue;
 212                 if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
 213                         continue;
 214
 215                 int_counter++;
 216                 ret = IRQ_HANDLED;
 217
 218                 hd = SD(sh);
 219
 220                 cp = &hd->ccb[0];
 221                 cmd = cp->cmd;
 222                 base = cmd->device->host->base;
 223
 224                 do {
 225                         stat = inb(base + HA_RSTATUS);
 226                         if (stat & HA_SDRQ) {
 227                                 if (cp->DataIn) {
 228                                         z = 256;
 229                                         odd = 0;
 230                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 231                                                 if (odd) {
 232                                                         *(cmd->SCp.ptr) = zwickel >> 8;
 233                                                         IncStat(&cmd->SCp, 1);
 234                                                         odd = 0;
 235                                                 }
 236                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 237                                                 insw(base + HA_RDATA, cmd->SCp.ptr, x);
 238                                                 z -= x;
 239                                                 IncStat(&cmd->SCp, 2 * x);
 240                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 241                                                         zwickel = inw(base + HA_RDATA);
 242                                                         *(cmd->SCp.ptr) = zwickel & 0xff;
 243                                                         IncStat(&cmd->SCp, 1);
 244                                                         z--;
 245                                                         odd = 1;
 246                                                 }
 247                                         }
 248                                         while (z > 0) {
 249                                                 zwickel = inw(base + HA_RDATA);
 250                                                 z--;
 251                                         }
 252                                 } else {        /* cp->DataOut */
 253
 254                                         odd = 0;
 255                                         z = 256;
 256                                         while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 257                                                 if (odd) {
 258                                                         zwickel += *(cmd->SCp.ptr) << 8;
 259                                                         IncStat(&cmd->SCp, 1);
 260                                                         outw(zwickel, base + HA_RDATA);
 261                                                         z--;
 262                                                         odd = 0;
 263                                                 }
 264                                                 x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 265                                                 outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 266                                                 z -= x;
 267                                                 IncStat(&cmd->SCp, 2 * x);
 268                                                 if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 269                                                         zwickel = *(cmd->SCp.ptr);
 270                                                         zwickel &= 0xff;
 271                                                         IncStat(&cmd->SCp, 1);
 272                                                         odd = 1;
 273                                                 }
 274                                         }
 275                                         while (z > 0 || odd) {
 276                                                 outw(zwickel, base + HA_RDATA);
 277                                                 z--;
 278                                                 odd = 0;
 279                                         }
 280                                 }
 281                         }
 282                 }
 283                 while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 284
 285                 /* terminate handler if HBA goes busy again, i.e. transfers
 286                  * more data */
 287
 288                 if (stat & HA_SBUSY)
 289                         break;
 290
 291                 /* OK, this is quite stupid, but I haven't found any correct
 292                  * way to get HBA&SCSI status so far */
 293
 294                 if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 295                         cmd->result = (DID_OK << 16);
 296                         hd->devflags |= (1 << cp->cp_id);
 297                 } else if (hd->devflags & (1 << cp->cp_id))
 298                         cmd->result = (DID_OK << 16) + 0x02;
 299                 else
 300                         cmd->result = (DID_NO_CONNECT << 16);
 301
 302                 if (cp->status == LOCKED) {
 303                         cp->status = FREE;
 304                         eata_stat = inb(base + HA_RSTATUS);
 305                         printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 306                         return ret;
 307                 }
 308 #if DBG_INTR2
 309                 if (stat != 0x50)
 310                         printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 311 #endif
 312
 313                 cp->status = FREE;      /* now we can release the slot  */
 314
 315                 cmd->scsi_done(cmd);
 316         }
 317
 318         return ret;
 319 }
 320
 321 static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
 322 {
 323         unsigned int loop = 50;
 324
 325         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 326                 if (--loop == 0)
 327                         return 1;
 328
 329         /* Enable interrupts for HBA.  It is not the best way to do it at this
 330          * place, but I hope that it doesn't interfere with the IDE driver
 331          * initialization this way */
 332
 333         outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 334
 335         outb(command, base + HA_WCOMMAND);
 336         return 0;
 337 }
 338
 339 static int eata_pio_queue(struct scsi_cmnd *cmd,
 340                 void (*done)(struct scsi_cmnd *))
 341 {
 342         unsigned int x, y;
 343         unsigned long base;
 344
 345         hostdata *hd;
 346         struct Scsi_Host *sh;
 347         struct eata_ccb *cp;
 348
 349         queue_counter++;
 350
 351         hd = HD(cmd);
 352         sh = cmd->device->host;
 353         base = sh->base;
 354
 355         /* use only slot 0, as 2001 can handle only one cmd at a time */
 356
 357         y = x = 0;
 358
 359         if (hd->ccb[y].status != FREE) {
 360
 361                 DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 362 #if DEBUG_EATA
 363                 panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 364 #else
 365                 panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 366 #endif
 367         }
 368
 369         cp = &hd->ccb[y];
 370
 371         memset(cp, 0, sizeof(struct eata_ccb));
 372         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 373
 374         cp->status = USED;      /* claim free slot */
 375
 376         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 377                 "eata_pio_queue pid %ld, y %d\n",
 378                 cmd->serial_number, y));
 379
 380         cmd->scsi_done = (void *) done;
 381
 382         if (cmd->sc_data_direction == DMA_TO_DEVICE)
 383                 cp->DataOut = 1;        /* Output mode */
 384         else
 385                 cp->DataIn = 0; /* Input mode  */
 386
 387         cp->Interpret = (cmd->device->id == hd->hostid);
 388         cp->cp_datalen = cpu_to_be32(cmd->request_bufflen);
 389         cp->Auto_Req_Sen = 0;
 390         cp->cp_reqDMA = 0;
 391         cp->reqlen = 0;
 392
 393         cp->cp_id = cmd->device->id;
 394         cp->cp_lun = cmd->device->lun;
 395         cp->cp_dispri = 0;
 396         cp->cp_identify = 1;
 397         memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 398
 399         cp->cp_statDMA = 0;
 400
 401         cp->cp_viraddr = cp;
 402         cp->cmd = cmd;
 403         cmd->host_scribble = (char *) &hd->ccb[y];
 404
 405         if (cmd->use_sg == 0) {
 406                 cmd->SCp.buffers_residual = 1;
 407                 cmd->SCp.ptr = cmd->request_buffer;
 408                 cmd->SCp.this_residual = cmd->request_bufflen;
 409                 cmd->SCp.buffer = NULL;
 410         } else {
 411                 cmd->SCp.buffer = cmd->request_buffer;
 412                 cmd->SCp.buffers_residual = cmd->use_sg;
 413                 cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
 414                 cmd->SCp.this_residual = cmd->SCp.buffer->length;
 415         }
 416         cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes
 417                                                                  * are to transfer */
 418
 419         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 420                 cmd->result = DID_BUS_BUSY << 16;
 421                 scmd_printk(KERN_NOTICE, cmd,
 422                         "eata_pio_queue pid %ld, HBA busy, "
 423                         "returning DID_BUS_BUSY, done.\n", cmd->serial_number);
 424                 done(cmd);
 425                 cp->status = FREE;
 426                 return 0;
 427         }
 428         /* FIXME: timeout */
 429         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 430                 cpu_relax();
 431         outsw(base + HA_RDATA, cp, hd->cplen);
 432         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 433         for (x = 0; x < hd->cppadlen; x++)
 434                 outw(0, base + HA_RDATA);
 435
 436         DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 437                 "Queued base %#.4lx pid: %ld "
 438                 "slot %d irq %d\n", sh->base, cmd->serial_number, y, sh->irq));
 439
 440         return 0;
 441 }
 442
 443 static int eata_pio_abort(struct scsi_cmnd *cmd)
 444 {
 445         unsigned int loop = 100;
 446
 447         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 448                 "eata_pio_abort called pid: %ld\n",
 449                 cmd->serial_number));
 450
 451         while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 452                 if (--loop == 0) {
 453                         printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 454                         return FAILED;
 455                 }
 456         if (CD(cmd)->status == FREE) {
 457                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 458                 return FAILED;
 459         }
 460         if (CD(cmd)->status == USED) {
 461                 DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 462                 /* We want to sleep a bit more here */
 463                 return FAILED;          /* SNOOZE */
 464         }
 465         if (CD(cmd)->status == RESET) {
 466                 printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 467                 return FAILED;
 468         }
 469         if (CD(cmd)->status == LOCKED) {
 470                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 471                 return FAILED;
 472         }
 473         panic("eata_pio: abort: invalid slot status\n");
 474 }
 475
 476 static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 477 {
 478         unsigned int x, limit = 0;
 479         unsigned char success = 0;
 480         struct scsi_cmnd *sp;
 481         struct Scsi_Host *host = cmd->device->host;
 482
 483         DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 484                 "eata_pio_reset called pid:%ld\n",
 485                 cmd->serial_number));
 486
 487         spin_lock_irq(host->host_lock);
 488
 489         if (HD(cmd)->state == RESET) {
 490                 printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 491                 spin_unlock_irq(host->host_lock);
 492                 return FAILED;
 493         }
 494
 495         /* force all slots to be free */
 496
 497         for (x = 0; x < cmd->device->host->can_queue; x++) {
 498
 499                 if (HD(cmd)->ccb[x].status == FREE)
 500                         continue;
 501
 502                 sp = HD(cmd)->ccb[x].cmd;
 503                 HD(cmd)->ccb[x].status = RESET;
 504                 printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->serial_number);
 505
 506                 if (sp == NULL)
 507                         panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 508         }
 509
 510         /* hard reset the HBA  */
 511         outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
 512
 513         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 514         HD(cmd)->state = RESET;
 515
 516         spin_unlock_irq(host->host_lock);
 517         msleep(3000);
 518         spin_lock_irq(host->host_lock);
 519
 520         DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 521
 522         for (x = 0; x < cmd->device->host->can_queue; x++) {
 523
 524                 /* Skip slots already set free by interrupt */
 525                 if (HD(cmd)->ccb[x].status != RESET)
 526                         continue;
 527
 528                 sp = HD(cmd)->ccb[x].cmd;
 529                 sp->result = DID_RESET << 16;
 530
 531                 /* This mailbox is terminated */
 532                 printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 533                 HD(cmd)->ccb[x].status = FREE;
 534
 535                 sp->scsi_done(sp);
 536         }
 537
 538         HD(cmd)->state = 0;
 539
 540         spin_unlock_irq(host->host_lock);
 541
 542         if (success) {          /* hmmm... */
 543                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 544                 return SUCCESS;
 545         } else {
 546                 DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 547                 return FAILED;
 548         }
 549 }
 550
 551 static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
 552 {
 553         struct eata_ccb cp;
 554         static char buff[256];
 555         int z;
 556
 557         memset(&cp, 0, sizeof(struct eata_ccb));
 558         memset(buff, 0, sizeof(buff));
 559
 560         cp.DataIn = 1;
 561         cp.Interpret = 1;       /* Interpret command */
 562
 563         cp.cp_datalen = cpu_to_be32(254);
 564         cp.cp_dataDMA = cpu_to_be32(0);
 565
 566         cp.cp_id = id;
 567         cp.cp_lun = 0;
 568
 569         cp.cp_cdb[0] = INQUIRY;
 570         cp.cp_cdb[1] = 0;
 571         cp.cp_cdb[2] = 0;
 572         cp.cp_cdb[3] = 0;
 573         cp.cp_cdb[4] = 254;
 574         cp.cp_cdb[5] = 0;
 575
 576         if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
 577                 return NULL;
 578
 579         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 580                 cpu_relax();
 581
 582         outsw(base + HA_RDATA, &cp, cplen);
 583         outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 584         for (z = 0; z < cppadlen; z++)
 585                 outw(0, base + HA_RDATA);
 586
 587         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 588                 cpu_relax();
 589
 590         if (inb(base + HA_RSTATUS) & HA_SERROR)
 591                 return NULL;
 592         else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 593                 return NULL;
 594         else {
 595                 insw(base + HA_RDATA, &buff, 127);
 596                 while (inb(base + HA_RSTATUS) & HA_SDRQ)
 597                         inw(base + HA_RDATA);
 598                 return buff;
 599         }
 600 }
 601
 602 static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
 603 {
 604         unsigned long loop = HZ / 2;
 605         int z;
 606         unsigned short *p;
 607
 608         if (!request_region(base, 9, "eata_pio"))
 609                 return 0;
 610
 611         memset(buf, 0, sizeof(struct get_conf));
 612
 613         while (inb(base + HA_RSTATUS) & HA_SBUSY)
 614                 if (--loop == 0)
 615                         goto fail;
 616
 617         DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
 618         eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 619
 620         loop = 50;
 621         for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 622                 while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 623                         if (--loop == 0)
 624                                 goto fail;
 625
 626                 loop = 50;
 627                 *p = inw(base + HA_RDATA);
 628         }
 629         if (inb(base + HA_RSTATUS) & HA_SERROR) {
 630                 DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 631                                         "transfer for HBA at %lx\n", base));
 632                 goto fail;
 633         }
 634
 635         if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
 636                 goto fail;
 637
 638         DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 639                                 "at %#4lx EATA Level: %x\n",
 640                                 base, (unsigned int) (buf->version)));
 641
 642         while (inb(base + HA_RSTATUS) & HA_SDRQ)
 643                 inw(base + HA_RDATA);
 644
 645         if (!ALLOW_DMA_BOARDS) {
 646                 for (z = 0; z < MAXISA; z++)
 647                         if (base == ISAbases[z]) {
 648                                 buf->IRQ = ISAirqs[z];
 649                                 break;
 650                         }
 651         }
 652
 653         return 1;
 654
 655  fail:
 656         release_region(base, 9);
 657         return 0;
 658 }
 659
 660 static void print_pio_config(struct get_conf *gc)
 661 {
 662         printk("Please check values: (read config data)\n");
 663         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);
 664         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);
 665         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);
 666 }
 667
 668 static unsigned int print_selftest(unsigned int base)
 669 {
 670         unsigned char buffer[512];
 671 #ifdef VERBOSE_SETUP
 672         int z;
 673 #endif
 674
 675         printk("eata_pio: executing controller self test & setup...\n");
 676         while (inb(base + HA_RSTATUS) & HA_SBUSY);
 677         outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 678         do {
 679                 while (inb(base + HA_RSTATUS) & HA_SBUSY)
 680                         /* nothing */ ;
 681                 if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 682                         insw(base + HA_RDATA, &buffer, 256);
 683 #ifdef VERBOSE_SETUP
 684                         /* no beeps please... */
 685                         for (z = 0; z < 511 && buffer[z]; z++)
 686                                 if (buffer[z] != 7)
 687                                         printk("%c", buffer[z]);
 688 #endif
 689                 }
 690         } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 691
 692         return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 693 }
 694
 695 static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
 696 {
 697         unsigned long size = 0;
 698         char *buff;
 699         unsigned long cplen;
 700         unsigned short cppadlen;
 701         struct Scsi_Host *sh;
 702         hostdata *hd;
 703
 704         DBG(DBG_REGISTER, print_pio_config(gc));
 705
 706         if (gc->DMA_support) {
 707                 printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 708                 if (!ALLOW_DMA_BOARDS)
 709                         return 0;
 710         }
 711
 712         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) {
 713                 printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
 714                 return 0;
 715         }
 716
 717         if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 718                 printk("HBA at %#lx failed while performing self test & setup.\n", base);
 719                 return 0;
 720         }
 721
 722         size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
 723
 724         sh = scsi_register(&driver_template, size);
 725         if (sh == NULL)
 726                 return 0;
 727
 728         if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 729                 if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
 730                         reg_IRQ[gc->IRQ]++;
 731                         if (!gc->IRQ_TR)
 732                                 reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 733                 } else {
 734                         printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 735                         return 0;
 736                 }
 737         } else {                /* More than one HBA on this IRQ */
 738                 if (reg_IRQL[gc->IRQ]) {
 739                         printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 740                         return 0;
 741                 } else
 742                         reg_IRQ[gc->IRQ]++;
 743         }
 744
 745         hd = SD(sh);
 746
 747         memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
 748         memset(hd->reads, 0, sizeof(hd->reads));
 749
 750         strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 751         strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 752         SD(sh)->revision[0] = buff[32];
 753         SD(sh)->revision[1] = buff[33];
 754         SD(sh)->revision[2] = buff[34];
 755         SD(sh)->revision[3] = '.';
 756         SD(sh)->revision[4] = buff[35];
 757         SD(sh)->revision[5] = 0;
 758
 759         switch (be32_to_cpu(gc->len)) {
 760         case 0x1c:
 761                 SD(sh)->EATA_revision = 'a';
 762                 break;
 763         case 0x1e:
 764                 SD(sh)->EATA_revision = 'b';
 765                 break;
 766         case 0x22:
 767                 SD(sh)->EATA_revision = 'c';
 768                 break;
 769         case 0x24:
 770                 SD(sh)->EATA_revision = 'z';
 771         default:
 772                 SD(sh)->EATA_revision = '?';
 773         }
 774
 775         if (be32_to_cpu(gc->len) >= 0x22) {
 776                 if (gc->is_PCI)
 777                         hd->bustype = IS_PCI;
 778                 else if (gc->is_EISA)
 779                         hd->bustype = IS_EISA;
 780                 else
 781                         hd->bustype = IS_ISA;
 782         } else {
 783                 if (buff[21] == '4')
 784                         hd->bustype = IS_PCI;
 785                 else if (buff[21] == '2')
 786                         hd->bustype = IS_EISA;
 787                 else
 788                         hd->bustype = IS_ISA;
 789         }
 790
 791         SD(sh)->cplen = cplen;
 792         SD(sh)->cppadlen = cppadlen;
 793         SD(sh)->hostid = gc->scsi_id[3];
 794         SD(sh)->devflags = 1 << gc->scsi_id[3];
 795         SD(sh)->moresupport = gc->MORE_support;
 796         sh->unique_id = base;
 797         sh->base = base;
 798         sh->io_port = base;
 799         sh->n_io_port = 9;
 800         sh->irq = gc->IRQ;
 801         sh->dma_channel = PIO;
 802         sh->this_id = gc->scsi_id[3];
 803         sh->can_queue = 1;
 804         sh->cmd_per_lun = 1;
 805         sh->sg_tablesize = SG_ALL;
 806
 807         hd->channel = 0;
 808
 809         hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
 810
 811         sh->max_id = 8;
 812         sh->max_lun = 8;
 813
 814         if (gc->SECOND)
 815                 hd->primary = 0;
 816         else
 817                 hd->primary = 1;
 818
 819         sh->unchecked_isa_dma = 0;      /* We can only do PIO */
 820
 821         hd->next = NULL;        /* build a linked list of all HBAs */
 822         hd->prev = last_HBA;
 823         if (hd->prev != NULL)
 824                 SD(hd->prev)->next = sh;
 825         last_HBA = sh;
 826         if (first_HBA == NULL)
 827                 first_HBA = sh;
 828         registered_HBAs++;
 829         return (1);
 830 }
 831
 832 static void find_pio_ISA(struct get_conf *buf)
 833 {
 834         int i;
 835
 836         for (i = 0; i < MAXISA; i++) {
 837                 if (!ISAbases[i])
 838                         continue;
 839                 if (!get_pio_conf_PIO(ISAbases[i], buf))
 840                         continue;
 841                 if (!register_pio_HBA(ISAbases[i], buf, NULL))
 842                         release_region(ISAbases[i], 9);
 843                 else
 844                         ISAbases[i] = 0;
 845         }
 846         return;
 847 }
 848
 849 static void find_pio_EISA(struct get_conf *buf)
 850 {
 851         u32 base;
 852         int i;
 853
 854 #ifdef CHECKPAL
 855         u8 pal1, pal2, pal3;
 856 #endif
 857
 858         for (i = 0; i < MAXEISA; i++) {
 859                 if (EISAbases[i]) {     /* Still a possibility ?          */
 860
 861                         base = 0x1c88 + (i * 0x1000);
 862 #ifdef CHECKPAL
 863                         pal1 = inb((u16) base - 8);
 864                         pal2 = inb((u16) base - 7);
 865                         pal3 = inb((u16) base - 6);
 866
 867                         if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 868                                 DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 869 #endif
 870                                 if (get_pio_conf_PIO(base, buf)) {
 871                                         DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 872                                         if (buf->IRQ) {
 873                                                 if (!register_pio_HBA(base, buf, NULL))
 874                                                         release_region(base, 9);
 875                                         } else {
 876                                                 printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 877                                                 release_region(base, 9);
 878                                         }
 879                                 }
 880                                 /* Nothing found here so we take it from the list */
 881                                 EISAbases[i] = 0;
 882 #ifdef CHECKPAL
 883                         }
 884 #endif
 885                 }
 886         }
 887         return;
 888 }
 889
 890 static void find_pio_PCI(struct get_conf *buf)
 891 {
 892 #ifndef CONFIG_PCI
 893         printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 894 #else
 895         struct pci_dev *dev = NULL;
 896         unsigned long base, x;
 897
 898         while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 899                 DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 900                 if (pci_enable_device(dev))
 901                         continue;
 902                 pci_set_master(dev);
 903                 base = pci_resource_flags(dev, 0);
 904                 if (base & IORESOURCE_MEM) {
 905                         printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 906                         continue;
 907                 }
 908                 base = pci_resource_start(dev, 0);
 909                 /* EISA tag there ? */
 910                 if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 911                         continue;       /* Jep, it's forced, so move on  */
 912                 base += 0x10;   /* Now, THIS is the real address */
 913                 if (base != 0x1f8) {
 914                         /* We didn't find it in the primary search */
 915                         if (get_pio_conf_PIO(base, buf)) {
 916                                 if (buf->FORCADR) {     /* If the address is forced */
 917                                         release_region(base, 9);
 918                                         continue;       /* we'll find it later      */
 919                                 }
 920
 921                                 /* OK. We made it till here, so we can go now
 922                                  * and register it. We  only have to check and
 923                                  * eventually remove it from the EISA and ISA list
 924                                  */
 925
 926                                 if (!register_pio_HBA(base, buf, dev)) {
 927                                         release_region(base, 9);
 928                                         continue;
 929                                 }
 930
 931                                 if (base < 0x1000) {
 932                                         for (x = 0; x < MAXISA; ++x) {
 933                                                 if (ISAbases[x] == base) {
 934                                                         ISAbases[x] = 0;
 935                                                         break;
 936                                                 }
 937                                         }
 938                                 } else if ((base & 0x0fff) == 0x0c88) {
 939                                         x = (base >> 12) & 0x0f;
 940                                         EISAbases[x] = 0;
 941                                 }
 942                         }
 943 #ifdef CHECK_BLINK
 944                         else if (check_blink_state(base)) {
 945                                 printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 946                         }
 947 #endif
 948                 }
 949         }
 950 #endif                          /* #ifndef CONFIG_PCI */
 951 }
 952
 953 static int eata_pio_detect(struct scsi_host_template *tpnt)
 954 {
 955         struct Scsi_Host *HBA_ptr;
 956         struct get_conf gc;
 957         int i;
 958
 959         find_pio_PCI(&gc);
 960         find_pio_EISA(&gc);
 961         find_pio_ISA(&gc);
 962
 963         for (i = 0; i <= MAXIRQ; i++)
 964                 if (reg_IRQ[i])
 965                         request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
 966
 967         HBA_ptr = first_HBA;
 968
 969         if (registered_HBAs != 0) {
 970                 printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 971                        "(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);
 972
 973                 printk("Registered HBAs:\n");
 974                 printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 975                 for (i = 1; i <= registered_HBAs; i++) {
 976                         printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
 977                                "  %2d  %2d  %2d\n",
 978                                HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 979                                SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 980                                "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 981                                HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 982                                SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 983                                HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 984                         HBA_ptr = SD(HBA_ptr)->next;
 985                 }
 986         }
 987         return (registered_HBAs);
 988 }
 989
 990 static struct scsi_host_template driver_template = {
 991         .proc_name              = "eata_pio",
 992         .name                   = "EATA (Extended Attachment) PIO driver",
 993         .proc_info              = eata_pio_proc_info,
 994         .detect                 = eata_pio_detect,
 995         .release                = eata_pio_release,
 996         .queuecommand           = eata_pio_queue,
 997         .eh_abort_handler       = eata_pio_abort,
 998         .eh_host_reset_handler  = eata_pio_host_reset,
 999         .use_clustering         = ENABLE_CLUSTERING,
1000 };
1001
1002 MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
1003 MODULE_DESCRIPTION("EATA SCSI PIO driver");
1004 MODULE_LICENSE("GPL");
1005
1006 #include "scsi_module.c"