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