linux/drivers/scsi/eata_pio.c
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   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@lxorguk.ukuu.org.uk> for *
  18 *   Linux 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/in.h>
  54#include <linux/pci.h>
  55#include <linux/proc_fs.h>
  56#include <linux/interrupt.h>
  57#include <linux/blkdev.h>
  58#include <linux/spinlock.h>
  59#include <linux/delay.h>
  60
  61#include <asm/io.h>
  62
  63#include <scsi/scsi.h>
  64#include <scsi/scsi_cmnd.h>
  65#include <scsi/scsi_device.h>
  66#include <scsi/scsi_host.h>
  67
  68#include "eata_generic.h"
  69#include "eata_pio.h"
  70
  71
  72static unsigned int ISAbases[MAXISA] =  {
  73         0x1F0, 0x170, 0x330, 0x230
  74};
  75
  76static unsigned int ISAirqs[MAXISA] = {
  77        14, 12, 15, 11
  78};
  79
  80static unsigned char EISAbases[] = { 
  81        1, 1, 1, 1, 1, 1, 1, 1,
  82        1, 1, 1, 1, 1, 1, 1, 1 
  83};
  84
  85static unsigned int registered_HBAs;
  86static struct Scsi_Host *last_HBA;
  87static struct Scsi_Host *first_HBA;
  88static unsigned char reg_IRQ[16];
  89static unsigned char reg_IRQL[16];
  90static unsigned long int_counter;
  91static unsigned long queue_counter;
  92
  93static struct scsi_host_template driver_template;
  94
  95/*
  96 * eata_proc_info
  97 * inout : decides on the direction of the dataflow and the meaning of the 
  98 *         variables
  99 * buffer: If inout==FALSE data is being written to it else read from it
 100 * *start: If inout==FALSE start of the valid data in the buffer
 101 * offset: If inout==FALSE offset from the beginning of the imaginary file 
 102 *         from which we start writing into the buffer
 103 * length: If inout==FALSE max number of bytes to be written into the buffer 
 104 *         else number of bytes in the buffer
 105 */
 106static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
 107                              int length, int rw)
 108{
 109        int len = 0;
 110        off_t begin = 0, pos = 0;
 111
 112        if (rw)
 113                return -ENOSYS;
 114
 115        len += sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
 116                   "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
 117        len += sprintf(buffer + len, "queued commands:     %10ld\n"
 118                   "processed interrupts:%10ld\n", queue_counter, int_counter);
 119        len += sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
 120                   shost->host_no, SD(shost)->name);
 121        len += sprintf(buffer + len, "Firmware revision: v%s\n",
 122                   SD(shost)->revision);
 123        len += sprintf(buffer + len, "IO: PIO\n");
 124        len += sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
 125        len += sprintf(buffer + len, "Host Bus: %s\n",
 126                   (SD(shost)->bustype == 'P')?"PCI ":
 127                   (SD(shost)->bustype == 'E')?"EISA":"ISA ");
 128    
 129        pos = begin + len;
 130    
 131        if (pos < offset) {
 132                len = 0;
 133                begin = pos;
 134        }
 135        if (pos > offset + length)
 136                goto stop_output;
 137    
 138stop_output:
 139        DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
 140        *start = buffer + (offset - begin);   /* Start of wanted data */
 141        len -= (offset - begin);            /* Start slop */
 142        if (len > length)
 143                len = length;               /* Ending slop */
 144        DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
 145    
 146        return len;
 147}
 148
 149static int eata_pio_release(struct Scsi_Host *sh)
 150{
 151        hostdata *hd = SD(sh);
 152        if (sh->irq && reg_IRQ[sh->irq] == 1)
 153                free_irq(sh->irq, NULL);
 154        else
 155                reg_IRQ[sh->irq]--;
 156        if (SD(sh)->channel == 0) {
 157                if (sh->io_port && sh->n_io_port)
 158                        release_region(sh->io_port, sh->n_io_port);
 159        }
 160        /* At this point the PCI reference can go */
 161        if (hd->pdev)
 162                pci_dev_put(hd->pdev);
 163        return 1;
 164}
 165
 166static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
 167{
 168        SCp->ptr += Increment;
 169        if ((SCp->this_residual -= Increment) == 0) {
 170                if ((--SCp->buffers_residual) == 0)
 171                        SCp->Status = 0;
 172                else {
 173                        SCp->buffer++;
 174                        SCp->ptr = sg_virt(SCp->buffer);
 175                        SCp->this_residual = SCp->buffer->length;
 176                }
 177        }
 178}
 179
 180static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
 181
 182static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
 183{
 184        unsigned long flags;
 185        struct Scsi_Host *dev = dev_id;
 186        irqreturn_t ret;
 187
 188        spin_lock_irqsave(dev->host_lock, flags);
 189        ret = eata_pio_int_handler(irq, dev_id);
 190        spin_unlock_irqrestore(dev->host_lock, flags);
 191        return ret;
 192}
 193
 194static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
 195{
 196        unsigned int eata_stat = 0xfffff;
 197        struct scsi_cmnd *cmd;
 198        hostdata *hd;
 199        struct eata_ccb *cp;
 200        unsigned long base;
 201        unsigned int x, z;
 202        struct Scsi_Host *sh;
 203        unsigned short zwickel = 0;
 204        unsigned char stat, odd;
 205        irqreturn_t ret = IRQ_NONE;
 206
 207        for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) 
 208        {
 209                if (sh->irq != irq)
 210                        continue;
 211                if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
 212                        continue;
 213
 214                int_counter++;
 215                ret = IRQ_HANDLED;
 216
 217                hd = SD(sh);
 218
 219                cp = &hd->ccb[0];
 220                cmd = cp->cmd;
 221                base = cmd->device->host->base;
 222
 223                do {
 224                        stat = inb(base + HA_RSTATUS);
 225                        if (stat & HA_SDRQ) {
 226                                if (cp->DataIn) {
 227                                        z = 256;
 228                                        odd = 0;
 229                                        while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 230                                                if (odd) {
 231                                                        *(cmd->SCp.ptr) = zwickel >> 8;
 232                                                        IncStat(&cmd->SCp, 1);
 233                                                        odd = 0;
 234                                                }
 235                                                x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 236                                                insw(base + HA_RDATA, cmd->SCp.ptr, x);
 237                                                z -= x;
 238                                                IncStat(&cmd->SCp, 2 * x);
 239                                                if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 240                                                        zwickel = inw(base + HA_RDATA);
 241                                                        *(cmd->SCp.ptr) = zwickel & 0xff;
 242                                                        IncStat(&cmd->SCp, 1);
 243                                                        z--;
 244                                                        odd = 1;
 245                                                }
 246                                        }
 247                                        while (z > 0) {
 248                                                zwickel = inw(base + HA_RDATA);
 249                                                z--;
 250                                        }
 251                                } else {        /* cp->DataOut */
 252
 253                                        odd = 0;
 254                                        z = 256;
 255                                        while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 256                                                if (odd) {
 257                                                        zwickel += *(cmd->SCp.ptr) << 8;
 258                                                        IncStat(&cmd->SCp, 1);
 259                                                        outw(zwickel, base + HA_RDATA);
 260                                                        z--;
 261                                                        odd = 0;
 262                                                }
 263                                                x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 264                                                outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 265                                                z -= x;
 266                                                IncStat(&cmd->SCp, 2 * x);
 267                                                if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 268                                                        zwickel = *(cmd->SCp.ptr);
 269                                                        zwickel &= 0xff;
 270                                                        IncStat(&cmd->SCp, 1);
 271                                                        odd = 1;
 272                                                }
 273                                        }
 274                                        while (z > 0 || odd) {
 275                                                outw(zwickel, base + HA_RDATA);
 276                                                z--;
 277                                                odd = 0;
 278                                        }
 279                                }
 280                        }
 281                }
 282                while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 283
 284                /* terminate handler if HBA goes busy again, i.e. transfers
 285                 * more data */
 286
 287                if (stat & HA_SBUSY)
 288                        break;
 289
 290                /* OK, this is quite stupid, but I haven't found any correct
 291                 * way to get HBA&SCSI status so far */
 292
 293                if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 294                        cmd->result = (DID_OK << 16);
 295                        hd->devflags |= (1 << cp->cp_id);
 296                } else if (hd->devflags & (1 << cp->cp_id))
 297                        cmd->result = (DID_OK << 16) + 0x02;
 298                else
 299                        cmd->result = (DID_NO_CONNECT << 16);
 300
 301                if (cp->status == LOCKED) {
 302                        cp->status = FREE;
 303                        eata_stat = inb(base + HA_RSTATUS);
 304                        printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 305                        return ret;
 306                }
 307#if DBG_INTR2
 308                if (stat != 0x50)
 309                        printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 310#endif
 311
 312                cp->status = FREE;      /* now we can release the slot  */
 313
 314                cmd->scsi_done(cmd);
 315        }
 316
 317        return ret;
 318}
 319
 320static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
 321{
 322        unsigned int loop = 50;
 323
 324        while (inb(base + HA_RSTATUS) & HA_SBUSY)
 325                if (--loop == 0)
 326                        return 1;
 327
 328        /* Enable interrupts for HBA.  It is not the best way to do it at this
 329         * place, but I hope that it doesn't interfere with the IDE driver 
 330         * initialization this way */
 331
 332        outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 333
 334        outb(command, base + HA_WCOMMAND);
 335        return 0;
 336}
 337
 338static int eata_pio_queue_lck(struct scsi_cmnd *cmd,
 339                void (*done)(struct scsi_cmnd *))
 340{
 341        unsigned int x, y;
 342        unsigned long base;
 343
 344        hostdata *hd;
 345        struct Scsi_Host *sh;
 346        struct eata_ccb *cp;
 347
 348        queue_counter++;
 349
 350        hd = HD(cmd);
 351        sh = cmd->device->host;
 352        base = sh->base;
 353
 354        /* use only slot 0, as 2001 can handle only one cmd at a time */
 355
 356        y = x = 0;
 357
 358        if (hd->ccb[y].status != FREE) {
 359
 360                DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 361#if DEBUG_EATA
 362                panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 363#else
 364                panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 365#endif
 366        }
 367
 368        cp = &hd->ccb[y];
 369
 370        memset(cp, 0, sizeof(struct eata_ccb));
 371
 372        cp->status = USED;      /* claim free slot */
 373
 374        DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 375                "eata_pio_queue 0x%p, y %d\n", cmd, y));
 376
 377        cmd->scsi_done = (void *) done;
 378
 379        if (cmd->sc_data_direction == DMA_TO_DEVICE)
 380                cp->DataOut = 1;        /* Output mode */
 381        else
 382                cp->DataIn = 0; /* Input mode  */
 383
 384        cp->Interpret = (cmd->device->id == hd->hostid);
 385        cp->cp_datalen = cpu_to_be32(scsi_bufflen(cmd));
 386        cp->Auto_Req_Sen = 0;
 387        cp->cp_reqDMA = 0;
 388        cp->reqlen = 0;
 389
 390        cp->cp_id = cmd->device->id;
 391        cp->cp_lun = cmd->device->lun;
 392        cp->cp_dispri = 0;
 393        cp->cp_identify = 1;
 394        memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 395
 396        cp->cp_statDMA = 0;
 397
 398        cp->cp_viraddr = cp;
 399        cp->cmd = cmd;
 400        cmd->host_scribble = (char *) &hd->ccb[y];
 401
 402        if (!scsi_bufflen(cmd)) {
 403                cmd->SCp.buffers_residual = 1;
 404                cmd->SCp.ptr = NULL;
 405                cmd->SCp.this_residual = 0;
 406                cmd->SCp.buffer = NULL;
 407        } else {
 408                cmd->SCp.buffer = scsi_sglist(cmd);
 409                cmd->SCp.buffers_residual = scsi_sg_count(cmd);
 410                cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
 411                cmd->SCp.this_residual = cmd->SCp.buffer->length;
 412        }
 413        cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes 
 414                                                                 * are to transfer */
 415
 416        if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 417                cmd->result = DID_BUS_BUSY << 16;
 418                scmd_printk(KERN_NOTICE, cmd,
 419                        "eata_pio_queue pid 0x%p, HBA busy, "
 420                        "returning DID_BUS_BUSY, done.\n", cmd);
 421                done(cmd);
 422                cp->status = FREE;
 423                return 0;
 424        }
 425        /* FIXME: timeout */
 426        while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 427                cpu_relax();
 428        outsw(base + HA_RDATA, cp, hd->cplen);
 429        outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 430        for (x = 0; x < hd->cppadlen; x++)
 431                outw(0, base + HA_RDATA);
 432
 433        DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 434                "Queued base %#.4lx cmd: 0x%p "
 435                "slot %d irq %d\n", sh->base, cmd, y, sh->irq));
 436
 437        return 0;
 438}
 439
 440static DEF_SCSI_QCMD(eata_pio_queue)
 441
 442static 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: 0x%p\n", cmd));
 448
 449        while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 450                if (--loop == 0) {
 451                        printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 452                        return FAILED;
 453                }
 454        if (CD(cmd)->status == FREE) {
 455                DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 456                return FAILED;
 457        }
 458        if (CD(cmd)->status == USED) {
 459                DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 460                /* We want to sleep a bit more here */
 461                return FAILED;          /* SNOOZE */
 462        }
 463        if (CD(cmd)->status == RESET) {
 464                printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 465                return FAILED;
 466        }
 467        if (CD(cmd)->status == LOCKED) {
 468                DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 469                return FAILED;
 470        }
 471        panic("eata_pio: abort: invalid slot status\n");
 472}
 473
 474static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 475{
 476        unsigned int x, limit = 0;
 477        unsigned char success = 0;
 478        struct scsi_cmnd *sp;
 479        struct Scsi_Host *host = cmd->device->host;
 480
 481        DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 482                "eata_pio_reset called\n"));
 483
 484        spin_lock_irq(host->host_lock);
 485
 486        if (HD(cmd)->state == RESET) {
 487                printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 488                spin_unlock_irq(host->host_lock);
 489                return FAILED;
 490        }
 491
 492        /* force all slots to be free */
 493
 494        for (x = 0; x < cmd->device->host->can_queue; x++) {
 495
 496                if (HD(cmd)->ccb[x].status == FREE)
 497                        continue;
 498
 499                sp = HD(cmd)->ccb[x].cmd;
 500                HD(cmd)->ccb[x].status = RESET;
 501                printk(KERN_WARNING "eata_pio_reset: slot %d in reset.\n", x);
 502
 503                if (sp == NULL)
 504                        panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 505        }
 506
 507        /* hard reset the HBA  */
 508        outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
 509
 510        DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 511        HD(cmd)->state = RESET;
 512
 513        spin_unlock_irq(host->host_lock);
 514        msleep(3000);
 515        spin_lock_irq(host->host_lock);
 516
 517        DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 518
 519        for (x = 0; x < cmd->device->host->can_queue; x++) {
 520
 521                /* Skip slots already set free by interrupt */
 522                if (HD(cmd)->ccb[x].status != RESET)
 523                        continue;
 524
 525                sp = HD(cmd)->ccb[x].cmd;
 526                sp->result = DID_RESET << 16;
 527
 528                /* This mailbox is terminated */
 529                printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 530                HD(cmd)->ccb[x].status = FREE;
 531
 532                sp->scsi_done(sp);
 533        }
 534
 535        HD(cmd)->state = 0;
 536
 537        spin_unlock_irq(host->host_lock);
 538
 539        if (success) {          /* hmmm... */
 540                DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 541                return SUCCESS;
 542        } else {
 543                DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 544                return FAILED;
 545        }
 546}
 547
 548static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
 549{
 550        struct eata_ccb cp;
 551        static char buff[256];
 552        int z;
 553
 554        memset(&cp, 0, sizeof(struct eata_ccb));
 555        memset(buff, 0, sizeof(buff));
 556
 557        cp.DataIn = 1;
 558        cp.Interpret = 1;       /* Interpret command */
 559
 560        cp.cp_datalen = cpu_to_be32(254);
 561        cp.cp_dataDMA = cpu_to_be32(0);
 562
 563        cp.cp_id = id;
 564        cp.cp_lun = 0;
 565
 566        cp.cp_cdb[0] = INQUIRY;
 567        cp.cp_cdb[1] = 0;
 568        cp.cp_cdb[2] = 0;
 569        cp.cp_cdb[3] = 0;
 570        cp.cp_cdb[4] = 254;
 571        cp.cp_cdb[5] = 0;
 572
 573        if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
 574                return NULL;
 575
 576        while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 577                cpu_relax();
 578
 579        outsw(base + HA_RDATA, &cp, cplen);
 580        outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 581        for (z = 0; z < cppadlen; z++)
 582                outw(0, base + HA_RDATA);
 583
 584        while (inb(base + HA_RSTATUS) & HA_SBUSY)
 585                cpu_relax();
 586
 587        if (inb(base + HA_RSTATUS) & HA_SERROR)
 588                return NULL;
 589        else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 590                return NULL;
 591        else {
 592                insw(base + HA_RDATA, &buff, 127);
 593                while (inb(base + HA_RSTATUS) & HA_SDRQ)
 594                        inw(base + HA_RDATA);
 595                return buff;
 596        }
 597}
 598
 599static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
 600{
 601        unsigned long loop = HZ / 2;
 602        int z;
 603        unsigned short *p;
 604
 605        if (!request_region(base, 9, "eata_pio"))
 606                return 0;
 607
 608        memset(buf, 0, sizeof(struct get_conf));
 609
 610        while (inb(base + HA_RSTATUS) & HA_SBUSY)
 611                if (--loop == 0)
 612                        goto fail;
 613
 614        DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
 615        eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 616
 617        loop = 50;
 618        for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 619                while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 620                        if (--loop == 0)
 621                                goto fail;
 622
 623                loop = 50;
 624                *p = inw(base + HA_RDATA);
 625        }
 626        if (inb(base + HA_RSTATUS) & HA_SERROR) {
 627                DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 628                                        "transfer for HBA at %lx\n", base));
 629                goto fail;
 630        }
 631
 632        if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
 633                goto fail;
 634
 635        DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 636                                "at %#4lx EATA Level: %x\n",
 637                                base, (unsigned int) (buf->version)));
 638
 639        while (inb(base + HA_RSTATUS) & HA_SDRQ)
 640                inw(base + HA_RDATA);
 641
 642        if (!ALLOW_DMA_BOARDS) {
 643                for (z = 0; z < MAXISA; z++)
 644                        if (base == ISAbases[z]) {
 645                                buf->IRQ = ISAirqs[z];
 646                                break;
 647                        }
 648        }
 649
 650        return 1;
 651
 652 fail:
 653        release_region(base, 9);
 654        return 0;
 655}
 656
 657static void print_pio_config(struct get_conf *gc)
 658{
 659        printk("Please check values: (read config data)\n");
 660        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);
 661        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);
 662        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);
 663}
 664
 665static unsigned int print_selftest(unsigned int base)
 666{
 667        unsigned char buffer[512];
 668#ifdef VERBOSE_SETUP
 669        int z;
 670#endif
 671
 672        printk("eata_pio: executing controller self test & setup...\n");
 673        while (inb(base + HA_RSTATUS) & HA_SBUSY);
 674        outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 675        do {
 676                while (inb(base + HA_RSTATUS) & HA_SBUSY)
 677                        /* nothing */ ;
 678                if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 679                        insw(base + HA_RDATA, &buffer, 256);
 680#ifdef VERBOSE_SETUP
 681                        /* no beeps please... */
 682                        for (z = 0; z < 511 && buffer[z]; z++)
 683                                if (buffer[z] != 7)
 684                                        printk("%c", buffer[z]);
 685#endif
 686                }
 687        } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 688
 689        return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 690}
 691
 692static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
 693{
 694        unsigned long size = 0;
 695        char *buff;
 696        unsigned long cplen;
 697        unsigned short cppadlen;
 698        struct Scsi_Host *sh;
 699        hostdata *hd;
 700
 701        DBG(DBG_REGISTER, print_pio_config(gc));
 702
 703        if (gc->DMA_support) {
 704                printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 705                if (!ALLOW_DMA_BOARDS)
 706                        return 0;
 707        }
 708
 709        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) {
 710                printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
 711                return 0;
 712        }
 713
 714        if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 715                printk("HBA at %#lx failed while performing self test & setup.\n", base);
 716                return 0;
 717        }
 718
 719        size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
 720
 721        sh = scsi_register(&driver_template, size);
 722        if (sh == NULL)
 723                return 0;
 724
 725        if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 726                if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
 727                        reg_IRQ[gc->IRQ]++;
 728                        if (!gc->IRQ_TR)
 729                                reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 730                } else {
 731                        printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 732                        return 0;
 733                }
 734        } else {                /* More than one HBA on this IRQ */
 735                if (reg_IRQL[gc->IRQ]) {
 736                        printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 737                        return 0;
 738                } else
 739                        reg_IRQ[gc->IRQ]++;
 740        }
 741
 742        hd = SD(sh);
 743
 744        memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
 745        memset(hd->reads, 0, sizeof(hd->reads));
 746
 747        strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 748        strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 749        SD(sh)->revision[0] = buff[32];
 750        SD(sh)->revision[1] = buff[33];
 751        SD(sh)->revision[2] = buff[34];
 752        SD(sh)->revision[3] = '.';
 753        SD(sh)->revision[4] = buff[35];
 754        SD(sh)->revision[5] = 0;
 755
 756        switch (be32_to_cpu(gc->len)) {
 757        case 0x1c:
 758                SD(sh)->EATA_revision = 'a';
 759                break;
 760        case 0x1e:
 761                SD(sh)->EATA_revision = 'b';
 762                break;
 763        case 0x22:
 764                SD(sh)->EATA_revision = 'c';
 765                break;
 766        case 0x24:
 767                SD(sh)->EATA_revision = 'z';
 768        default:
 769                SD(sh)->EATA_revision = '?';
 770        }
 771
 772        if (be32_to_cpu(gc->len) >= 0x22) {
 773                if (gc->is_PCI)
 774                        hd->bustype = IS_PCI;
 775                else if (gc->is_EISA)
 776                        hd->bustype = IS_EISA;
 777                else
 778                        hd->bustype = IS_ISA;
 779        } else {
 780                if (buff[21] == '4')
 781                        hd->bustype = IS_PCI;
 782                else if (buff[21] == '2')
 783                        hd->bustype = IS_EISA;
 784                else
 785                        hd->bustype = IS_ISA;
 786        }
 787
 788        SD(sh)->cplen = cplen;
 789        SD(sh)->cppadlen = cppadlen;
 790        SD(sh)->hostid = gc->scsi_id[3];
 791        SD(sh)->devflags = 1 << gc->scsi_id[3];
 792        SD(sh)->moresupport = gc->MORE_support;
 793        sh->unique_id = base;
 794        sh->base = base;
 795        sh->io_port = base;
 796        sh->n_io_port = 9;
 797        sh->irq = gc->IRQ;
 798        sh->dma_channel = PIO;
 799        sh->this_id = gc->scsi_id[3];
 800        sh->can_queue = 1;
 801        sh->cmd_per_lun = 1;
 802        sh->sg_tablesize = SG_ALL;
 803
 804        hd->channel = 0;
 805
 806        hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
 807
 808        sh->max_id = 8;
 809        sh->max_lun = 8;
 810
 811        if (gc->SECOND)
 812                hd->primary = 0;
 813        else
 814                hd->primary = 1;
 815
 816        hd->next = NULL;        /* build a linked list of all HBAs */
 817        hd->prev = last_HBA;
 818        if (hd->prev != NULL)
 819                SD(hd->prev)->next = sh;
 820        last_HBA = sh;
 821        if (first_HBA == NULL)
 822                first_HBA = sh;
 823        registered_HBAs++;
 824        return (1);
 825}
 826
 827static void find_pio_ISA(struct get_conf *buf)
 828{
 829        int i;
 830
 831        for (i = 0; i < MAXISA; i++) {
 832                if (!ISAbases[i])
 833                        continue;
 834                if (!get_pio_conf_PIO(ISAbases[i], buf))
 835                        continue;
 836                if (!register_pio_HBA(ISAbases[i], buf, NULL))
 837                        release_region(ISAbases[i], 9);
 838                else
 839                        ISAbases[i] = 0;
 840        }
 841        return;
 842}
 843
 844static void find_pio_EISA(struct get_conf *buf)
 845{
 846        u32 base;
 847        int i;
 848
 849#ifdef CHECKPAL
 850        u8 pal1, pal2, pal3;
 851#endif
 852
 853        for (i = 0; i < MAXEISA; i++) {
 854                if (EISAbases[i]) {     /* Still a possibility ?          */
 855
 856                        base = 0x1c88 + (i * 0x1000);
 857#ifdef CHECKPAL
 858                        pal1 = inb((u16) base - 8);
 859                        pal2 = inb((u16) base - 7);
 860                        pal3 = inb((u16) base - 6);
 861
 862                        if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 863                                DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 864#endif
 865                                if (get_pio_conf_PIO(base, buf)) {
 866                                        DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 867                                        if (buf->IRQ) {
 868                                                if (!register_pio_HBA(base, buf, NULL))
 869                                                        release_region(base, 9);
 870                                        } else {
 871                                                printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 872                                                release_region(base, 9);
 873                                        }
 874                                }
 875                                /* Nothing found here so we take it from the list */
 876                                EISAbases[i] = 0;
 877#ifdef CHECKPAL
 878                        }
 879#endif
 880                }
 881        }
 882        return;
 883}
 884
 885static void find_pio_PCI(struct get_conf *buf)
 886{
 887#ifndef CONFIG_PCI
 888        printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 889#else
 890        struct pci_dev *dev = NULL;
 891        unsigned long base, x;
 892
 893        while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 894                DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 895                if (pci_enable_device(dev))
 896                        continue;
 897                pci_set_master(dev);
 898                base = pci_resource_flags(dev, 0);
 899                if (base & IORESOURCE_MEM) {
 900                        printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 901                        continue;
 902                }
 903                base = pci_resource_start(dev, 0);
 904                /* EISA tag there ? */
 905                if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 906                        continue;       /* Jep, it's forced, so move on  */
 907                base += 0x10;   /* Now, THIS is the real address */
 908                if (base != 0x1f8) {
 909                        /* We didn't find it in the primary search */
 910                        if (get_pio_conf_PIO(base, buf)) {
 911                                if (buf->FORCADR) {     /* If the address is forced */
 912                                        release_region(base, 9);
 913                                        continue;       /* we'll find it later      */
 914                                }
 915
 916                                /* OK. We made it till here, so we can go now  
 917                                 * and register it. We  only have to check and 
 918                                 * eventually remove it from the EISA and ISA list 
 919                                 */
 920
 921                                if (!register_pio_HBA(base, buf, dev)) {
 922                                        release_region(base, 9);
 923                                        continue;
 924                                }
 925
 926                                if (base < 0x1000) {
 927                                        for (x = 0; x < MAXISA; ++x) {
 928                                                if (ISAbases[x] == base) {
 929                                                        ISAbases[x] = 0;
 930                                                        break;
 931                                                }
 932                                        }
 933                                } else if ((base & 0x0fff) == 0x0c88) {
 934                                        x = (base >> 12) & 0x0f;
 935                                        EISAbases[x] = 0;
 936                                }
 937                        }
 938#ifdef CHECK_BLINK
 939                        else if (check_blink_state(base)) {
 940                                printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 941                        }
 942#endif
 943                }
 944        }
 945#endif                          /* #ifndef CONFIG_PCI */
 946}
 947
 948static int eata_pio_detect(struct scsi_host_template *tpnt)
 949{
 950        struct Scsi_Host *HBA_ptr;
 951        struct get_conf gc;
 952        int i;
 953
 954        find_pio_PCI(&gc);
 955        find_pio_EISA(&gc);
 956        find_pio_ISA(&gc);
 957
 958        for (i = 0; i <= MAXIRQ; i++)
 959                if (reg_IRQ[i])
 960                        request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
 961
 962        HBA_ptr = first_HBA;
 963
 964        if (registered_HBAs != 0) {
 965                printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 966                       "(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);
 967
 968                printk("Registered HBAs:\n");
 969                printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 970                for (i = 1; i <= registered_HBAs; i++) {
 971                        printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
 972                               "  %2d  %2d  %2d\n",
 973                               HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 974                               SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 975                               "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 976                               HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 977                               SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 978                               HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 979                        HBA_ptr = SD(HBA_ptr)->next;
 980                }
 981        }
 982        return (registered_HBAs);
 983}
 984
 985static struct scsi_host_template driver_template = {
 986        .proc_name              = "eata_pio",
 987        .name                   = "EATA (Extended Attachment) PIO driver",
 988        .proc_info              = eata_pio_proc_info,
 989        .detect                 = eata_pio_detect,
 990        .release                = eata_pio_release,
 991        .queuecommand           = eata_pio_queue,
 992        .eh_abort_handler       = eata_pio_abort,
 993        .eh_host_reset_handler  = eata_pio_host_reset,
 994        .use_clustering         = ENABLE_CLUSTERING,
 995};
 996
 997MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
 998MODULE_DESCRIPTION("EATA SCSI PIO driver");
 999MODULE_LICENSE("GPL");
1000
1001#include "scsi_module.c"
1002
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