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
  95static int eata_pio_show_info(struct seq_file *m, struct Scsi_Host *shost)
  96{
  97        seq_printf(m, "EATA (Extended Attachment) PIO driver version: "
  98                   "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
  99        seq_printf(m, "queued commands:     %10ld\n"
 100                   "processed interrupts:%10ld\n", queue_counter, int_counter);
 101        seq_printf(m, "\nscsi%-2d: HBA %.10s\n",
 102                   shost->host_no, SD(shost)->name);
 103        seq_printf(m, "Firmware revision: v%s\n",
 104                   SD(shost)->revision);
 105        seq_printf(m, "IO: PIO\n");
 106        seq_printf(m, "Base IO : %#.4x\n", (u32) shost->base);
 107        seq_printf(m, "Host Bus: %s\n",
 108                   (SD(shost)->bustype == 'P')?"PCI ":
 109                   (SD(shost)->bustype == 'E')?"EISA":"ISA ");
 110        return 0;
 111}
 112
 113static int eata_pio_release(struct Scsi_Host *sh)
 114{
 115        hostdata *hd = SD(sh);
 116        if (sh->irq && reg_IRQ[sh->irq] == 1)
 117                free_irq(sh->irq, NULL);
 118        else
 119                reg_IRQ[sh->irq]--;
 120        if (SD(sh)->channel == 0) {
 121                if (sh->io_port && sh->n_io_port)
 122                        release_region(sh->io_port, sh->n_io_port);
 123        }
 124        /* At this point the PCI reference can go */
 125        if (hd->pdev)
 126                pci_dev_put(hd->pdev);
 127        return 1;
 128}
 129
 130static void IncStat(struct scsi_pointer *SCp, unsigned int Increment)
 131{
 132        SCp->ptr += Increment;
 133        if ((SCp->this_residual -= Increment) == 0) {
 134                if ((--SCp->buffers_residual) == 0)
 135                        SCp->Status = 0;
 136                else {
 137                        SCp->buffer++;
 138                        SCp->ptr = sg_virt(SCp->buffer);
 139                        SCp->this_residual = SCp->buffer->length;
 140                }
 141        }
 142}
 143
 144static irqreturn_t eata_pio_int_handler(int irq, void *dev_id);
 145
 146static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id)
 147{
 148        unsigned long flags;
 149        struct Scsi_Host *dev = dev_id;
 150        irqreturn_t ret;
 151
 152        spin_lock_irqsave(dev->host_lock, flags);
 153        ret = eata_pio_int_handler(irq, dev_id);
 154        spin_unlock_irqrestore(dev->host_lock, flags);
 155        return ret;
 156}
 157
 158static irqreturn_t eata_pio_int_handler(int irq, void *dev_id)
 159{
 160        unsigned int eata_stat = 0xfffff;
 161        struct scsi_cmnd *cmd;
 162        hostdata *hd;
 163        struct eata_ccb *cp;
 164        unsigned long base;
 165        unsigned int x, z;
 166        struct Scsi_Host *sh;
 167        unsigned short zwickel = 0;
 168        unsigned char stat, odd;
 169        irqreturn_t ret = IRQ_NONE;
 170
 171        for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) 
 172        {
 173                if (sh->irq != irq)
 174                        continue;
 175                if (inb(sh->base + HA_RSTATUS) & HA_SBUSY)
 176                        continue;
 177
 178                int_counter++;
 179                ret = IRQ_HANDLED;
 180
 181                hd = SD(sh);
 182
 183                cp = &hd->ccb[0];
 184                cmd = cp->cmd;
 185                base = cmd->device->host->base;
 186
 187                do {
 188                        stat = inb(base + HA_RSTATUS);
 189                        if (stat & HA_SDRQ) {
 190                                if (cp->DataIn) {
 191                                        z = 256;
 192                                        odd = 0;
 193                                        while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 194                                                if (odd) {
 195                                                        *(cmd->SCp.ptr) = zwickel >> 8;
 196                                                        IncStat(&cmd->SCp, 1);
 197                                                        odd = 0;
 198                                                }
 199                                                x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 200                                                insw(base + HA_RDATA, cmd->SCp.ptr, x);
 201                                                z -= x;
 202                                                IncStat(&cmd->SCp, 2 * x);
 203                                                if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 204                                                        zwickel = inw(base + HA_RDATA);
 205                                                        *(cmd->SCp.ptr) = zwickel & 0xff;
 206                                                        IncStat(&cmd->SCp, 1);
 207                                                        z--;
 208                                                        odd = 1;
 209                                                }
 210                                        }
 211                                        while (z > 0) {
 212                                                zwickel = inw(base + HA_RDATA);
 213                                                z--;
 214                                        }
 215                                } else {        /* cp->DataOut */
 216
 217                                        odd = 0;
 218                                        z = 256;
 219                                        while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
 220                                                if (odd) {
 221                                                        zwickel += *(cmd->SCp.ptr) << 8;
 222                                                        IncStat(&cmd->SCp, 1);
 223                                                        outw(zwickel, base + HA_RDATA);
 224                                                        z--;
 225                                                        odd = 0;
 226                                                }
 227                                                x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
 228                                                outsw(base + HA_RDATA, cmd->SCp.ptr, x);
 229                                                z -= x;
 230                                                IncStat(&cmd->SCp, 2 * x);
 231                                                if ((z > 0) && (cmd->SCp.this_residual == 1)) {
 232                                                        zwickel = *(cmd->SCp.ptr);
 233                                                        zwickel &= 0xff;
 234                                                        IncStat(&cmd->SCp, 1);
 235                                                        odd = 1;
 236                                                }
 237                                        }
 238                                        while (z > 0 || odd) {
 239                                                outw(zwickel, base + HA_RDATA);
 240                                                z--;
 241                                                odd = 0;
 242                                        }
 243                                }
 244                        }
 245                }
 246                while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
 247
 248                /* terminate handler if HBA goes busy again, i.e. transfers
 249                 * more data */
 250
 251                if (stat & HA_SBUSY)
 252                        break;
 253
 254                /* OK, this is quite stupid, but I haven't found any correct
 255                 * way to get HBA&SCSI status so far */
 256
 257                if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
 258                        cmd->result = (DID_OK << 16);
 259                        hd->devflags |= (1 << cp->cp_id);
 260                } else if (hd->devflags & (1 << cp->cp_id))
 261                        cmd->result = (DID_OK << 16) + 0x02;
 262                else
 263                        cmd->result = (DID_NO_CONNECT << 16);
 264
 265                if (cp->status == LOCKED) {
 266                        cp->status = FREE;
 267                        eata_stat = inb(base + HA_RSTATUS);
 268                        printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
 269                        return ret;
 270                }
 271#if DBG_INTR2
 272                if (stat != 0x50)
 273                        printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
 274#endif
 275
 276                cp->status = FREE;      /* now we can release the slot  */
 277
 278                cmd->scsi_done(cmd);
 279        }
 280
 281        return ret;
 282}
 283
 284static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command)
 285{
 286        unsigned int loop = 50;
 287
 288        while (inb(base + HA_RSTATUS) & HA_SBUSY)
 289                if (--loop == 0)
 290                        return 1;
 291
 292        /* Enable interrupts for HBA.  It is not the best way to do it at this
 293         * place, but I hope that it doesn't interfere with the IDE driver 
 294         * initialization this way */
 295
 296        outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
 297
 298        outb(command, base + HA_WCOMMAND);
 299        return 0;
 300}
 301
 302static int eata_pio_queue_lck(struct scsi_cmnd *cmd,
 303                void (*done)(struct scsi_cmnd *))
 304{
 305        unsigned int x, y;
 306        unsigned long base;
 307
 308        hostdata *hd;
 309        struct Scsi_Host *sh;
 310        struct eata_ccb *cp;
 311
 312        queue_counter++;
 313
 314        hd = HD(cmd);
 315        sh = cmd->device->host;
 316        base = sh->base;
 317
 318        /* use only slot 0, as 2001 can handle only one cmd at a time */
 319
 320        y = x = 0;
 321
 322        if (hd->ccb[y].status != FREE) {
 323
 324                DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
 325#if DEBUG_EATA
 326                panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
 327#else
 328                panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
 329#endif
 330        }
 331
 332        cp = &hd->ccb[y];
 333
 334        memset(cp, 0, sizeof(struct eata_ccb));
 335
 336        cp->status = USED;      /* claim free slot */
 337
 338        DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 339                "eata_pio_queue 0x%p, y %d\n", cmd, y));
 340
 341        cmd->scsi_done = (void *) done;
 342
 343        if (cmd->sc_data_direction == DMA_TO_DEVICE)
 344                cp->DataOut = 1;        /* Output mode */
 345        else
 346                cp->DataIn = 0; /* Input mode  */
 347
 348        cp->Interpret = (cmd->device->id == hd->hostid);
 349        cp->cp_datalen = cpu_to_be32(scsi_bufflen(cmd));
 350        cp->Auto_Req_Sen = 0;
 351        cp->cp_reqDMA = 0;
 352        cp->reqlen = 0;
 353
 354        cp->cp_id = cmd->device->id;
 355        cp->cp_lun = cmd->device->lun;
 356        cp->cp_dispri = 0;
 357        cp->cp_identify = 1;
 358        memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
 359
 360        cp->cp_statDMA = 0;
 361
 362        cp->cp_viraddr = cp;
 363        cp->cmd = cmd;
 364        cmd->host_scribble = (char *) &hd->ccb[y];
 365
 366        if (!scsi_bufflen(cmd)) {
 367                cmd->SCp.buffers_residual = 1;
 368                cmd->SCp.ptr = NULL;
 369                cmd->SCp.this_residual = 0;
 370                cmd->SCp.buffer = NULL;
 371        } else {
 372                cmd->SCp.buffer = scsi_sglist(cmd);
 373                cmd->SCp.buffers_residual = scsi_sg_count(cmd);
 374                cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
 375                cmd->SCp.this_residual = cmd->SCp.buffer->length;
 376        }
 377        cmd->SCp.Status = (cmd->SCp.this_residual != 0);        /* TRUE as long as bytes 
 378                                                                 * are to transfer */
 379
 380        if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
 381                cmd->result = DID_BUS_BUSY << 16;
 382                scmd_printk(KERN_NOTICE, cmd,
 383                        "eata_pio_queue pid 0x%p, HBA busy, "
 384                        "returning DID_BUS_BUSY, done.\n", cmd);
 385                done(cmd);
 386                cp->status = FREE;
 387                return 0;
 388        }
 389        /* FIXME: timeout */
 390        while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 391                cpu_relax();
 392        outsw(base + HA_RDATA, cp, hd->cplen);
 393        outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 394        for (x = 0; x < hd->cppadlen; x++)
 395                outw(0, base + HA_RDATA);
 396
 397        DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd,
 398                "Queued base %#.4lx cmd: 0x%p "
 399                "slot %d irq %d\n", sh->base, cmd, y, sh->irq));
 400
 401        return 0;
 402}
 403
 404static DEF_SCSI_QCMD(eata_pio_queue)
 405
 406static int eata_pio_abort(struct scsi_cmnd *cmd)
 407{
 408        unsigned int loop = 100;
 409
 410        DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 411                "eata_pio_abort called pid: 0x%p\n", cmd));
 412
 413        while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
 414                if (--loop == 0) {
 415                        printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
 416                        return FAILED;
 417                }
 418        if (CD(cmd)->status == FREE) {
 419                DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
 420                return FAILED;
 421        }
 422        if (CD(cmd)->status == USED) {
 423                DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
 424                /* We want to sleep a bit more here */
 425                return FAILED;          /* SNOOZE */
 426        }
 427        if (CD(cmd)->status == RESET) {
 428                printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
 429                return FAILED;
 430        }
 431        if (CD(cmd)->status == LOCKED) {
 432                DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
 433                return FAILED;
 434        }
 435        panic("eata_pio: abort: invalid slot status\n");
 436}
 437
 438static int eata_pio_host_reset(struct scsi_cmnd *cmd)
 439{
 440        unsigned int x, limit = 0;
 441        unsigned char success = 0;
 442        struct scsi_cmnd *sp;
 443        struct Scsi_Host *host = cmd->device->host;
 444
 445        DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd,
 446                "eata_pio_reset called\n"));
 447
 448        spin_lock_irq(host->host_lock);
 449
 450        if (HD(cmd)->state == RESET) {
 451                printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
 452                spin_unlock_irq(host->host_lock);
 453                return FAILED;
 454        }
 455
 456        /* force all slots to be free */
 457
 458        for (x = 0; x < cmd->device->host->can_queue; x++) {
 459
 460                if (HD(cmd)->ccb[x].status == FREE)
 461                        continue;
 462
 463                sp = HD(cmd)->ccb[x].cmd;
 464                HD(cmd)->ccb[x].status = RESET;
 465                printk(KERN_WARNING "eata_pio_reset: slot %d in reset.\n", x);
 466
 467                if (sp == NULL)
 468                        panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
 469        }
 470
 471        /* hard reset the HBA  */
 472        outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND);
 473
 474        DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
 475        HD(cmd)->state = RESET;
 476
 477        spin_unlock_irq(host->host_lock);
 478        msleep(3000);
 479        spin_lock_irq(host->host_lock);
 480
 481        DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
 482
 483        for (x = 0; x < cmd->device->host->can_queue; x++) {
 484
 485                /* Skip slots already set free by interrupt */
 486                if (HD(cmd)->ccb[x].status != RESET)
 487                        continue;
 488
 489                sp = HD(cmd)->ccb[x].cmd;
 490                sp->result = DID_RESET << 16;
 491
 492                /* This mailbox is terminated */
 493                printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
 494                HD(cmd)->ccb[x].status = FREE;
 495
 496                sp->scsi_done(sp);
 497        }
 498
 499        HD(cmd)->state = 0;
 500
 501        spin_unlock_irq(host->host_lock);
 502
 503        if (success) {          /* hmmm... */
 504                DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
 505                return SUCCESS;
 506        } else {
 507                DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
 508                return FAILED;
 509        }
 510}
 511
 512static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen)
 513{
 514        struct eata_ccb cp;
 515        static char buff[256];
 516        int z;
 517
 518        memset(&cp, 0, sizeof(struct eata_ccb));
 519        memset(buff, 0, sizeof(buff));
 520
 521        cp.DataIn = 1;
 522        cp.Interpret = 1;       /* Interpret command */
 523
 524        cp.cp_datalen = cpu_to_be32(254);
 525        cp.cp_dataDMA = cpu_to_be32(0);
 526
 527        cp.cp_id = id;
 528        cp.cp_lun = 0;
 529
 530        cp.cp_cdb[0] = INQUIRY;
 531        cp.cp_cdb[1] = 0;
 532        cp.cp_cdb[2] = 0;
 533        cp.cp_cdb[3] = 0;
 534        cp.cp_cdb[4] = 254;
 535        cp.cp_cdb[5] = 0;
 536
 537        if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP))
 538                return NULL;
 539
 540        while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 541                cpu_relax();
 542
 543        outsw(base + HA_RDATA, &cp, cplen);
 544        outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
 545        for (z = 0; z < cppadlen; z++)
 546                outw(0, base + HA_RDATA);
 547
 548        while (inb(base + HA_RSTATUS) & HA_SBUSY)
 549                cpu_relax();
 550
 551        if (inb(base + HA_RSTATUS) & HA_SERROR)
 552                return NULL;
 553        else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 554                return NULL;
 555        else {
 556                insw(base + HA_RDATA, &buff, 127);
 557                while (inb(base + HA_RSTATUS) & HA_SDRQ)
 558                        inw(base + HA_RDATA);
 559                return buff;
 560        }
 561}
 562
 563static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf)
 564{
 565        unsigned long loop = HZ / 2;
 566        int z;
 567        unsigned short *p;
 568
 569        if (!request_region(base, 9, "eata_pio"))
 570                return 0;
 571
 572        memset(buf, 0, sizeof(struct get_conf));
 573
 574        while (inb(base + HA_RSTATUS) & HA_SBUSY)
 575                if (--loop == 0)
 576                        goto fail;
 577
 578        DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base));
 579        eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
 580
 581        loop = 50;
 582        for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
 583                while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 584                        if (--loop == 0)
 585                                goto fail;
 586
 587                loop = 50;
 588                *p = inw(base + HA_RDATA);
 589        }
 590        if (inb(base + HA_RSTATUS) & HA_SERROR) {
 591                DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
 592                                        "transfer for HBA at %lx\n", base));
 593                goto fail;
 594        }
 595
 596        if (cpu_to_be32(EATA_SIGNATURE) != buf->signature)
 597                goto fail;
 598
 599        DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
 600                                "at %#4lx EATA Level: %x\n",
 601                                base, (unsigned int) (buf->version)));
 602
 603        while (inb(base + HA_RSTATUS) & HA_SDRQ)
 604                inw(base + HA_RDATA);
 605
 606        if (!ALLOW_DMA_BOARDS) {
 607                for (z = 0; z < MAXISA; z++)
 608                        if (base == ISAbases[z]) {
 609                                buf->IRQ = ISAirqs[z];
 610                                break;
 611                        }
 612        }
 613
 614        return 1;
 615
 616 fail:
 617        release_region(base, 9);
 618        return 0;
 619}
 620
 621static void print_pio_config(struct get_conf *gc)
 622{
 623        printk("Please check values: (read config data)\n");
 624        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);
 625        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);
 626        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);
 627}
 628
 629static unsigned int print_selftest(unsigned int base)
 630{
 631        unsigned char buffer[512];
 632#ifdef VERBOSE_SETUP
 633        int z;
 634#endif
 635
 636        printk("eata_pio: executing controller self test & setup...\n");
 637        while (inb(base + HA_RSTATUS) & HA_SBUSY);
 638        outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
 639        do {
 640                while (inb(base + HA_RSTATUS) & HA_SBUSY)
 641                        /* nothing */ ;
 642                if (inb(base + HA_RSTATUS) & HA_SDRQ) {
 643                        insw(base + HA_RDATA, &buffer, 256);
 644#ifdef VERBOSE_SETUP
 645                        /* no beeps please... */
 646                        for (z = 0; z < 511 && buffer[z]; z++)
 647                                if (buffer[z] != 7)
 648                                        printk("%c", buffer[z]);
 649#endif
 650                }
 651        } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
 652
 653        return (!(inb(base + HA_RSTATUS) & HA_SERROR));
 654}
 655
 656static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev)
 657{
 658        unsigned long size = 0;
 659        char *buff;
 660        unsigned long cplen;
 661        unsigned short cppadlen;
 662        struct Scsi_Host *sh;
 663        hostdata *hd;
 664
 665        DBG(DBG_REGISTER, print_pio_config(gc));
 666
 667        if (gc->DMA_support) {
 668                printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
 669                if (!ALLOW_DMA_BOARDS)
 670                        return 0;
 671        }
 672
 673        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) {
 674                printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base);
 675                return 0;
 676        }
 677
 678        if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
 679                printk("HBA at %#lx failed while performing self test & setup.\n", base);
 680                return 0;
 681        }
 682
 683        size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz));
 684
 685        sh = scsi_register(&driver_template, size);
 686        if (sh == NULL)
 687                return 0;
 688
 689        if (!reg_IRQ[gc->IRQ]) {        /* Interrupt already registered ? */
 690                if (!request_irq(gc->IRQ, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", sh)) {
 691                        reg_IRQ[gc->IRQ]++;
 692                        if (!gc->IRQ_TR)
 693                                reg_IRQL[gc->IRQ] = 1;  /* IRQ is edge triggered */
 694                } else {
 695                        printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
 696                        return 0;
 697                }
 698        } else {                /* More than one HBA on this IRQ */
 699                if (reg_IRQL[gc->IRQ]) {
 700                        printk("Can't support more than one HBA on this IRQ,\n" "  if the IRQ is edge triggered. Sorry.\n");
 701                        return 0;
 702                } else
 703                        reg_IRQ[gc->IRQ]++;
 704        }
 705
 706        hd = SD(sh);
 707
 708        memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)));
 709        memset(hd->reads, 0, sizeof(hd->reads));
 710
 711        strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
 712        strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
 713        SD(sh)->revision[0] = buff[32];
 714        SD(sh)->revision[1] = buff[33];
 715        SD(sh)->revision[2] = buff[34];
 716        SD(sh)->revision[3] = '.';
 717        SD(sh)->revision[4] = buff[35];
 718        SD(sh)->revision[5] = 0;
 719
 720        switch (be32_to_cpu(gc->len)) {
 721        case 0x1c:
 722                SD(sh)->EATA_revision = 'a';
 723                break;
 724        case 0x1e:
 725                SD(sh)->EATA_revision = 'b';
 726                break;
 727        case 0x22:
 728                SD(sh)->EATA_revision = 'c';
 729                break;
 730        case 0x24:
 731                SD(sh)->EATA_revision = 'z';
 732        default:
 733                SD(sh)->EATA_revision = '?';
 734        }
 735
 736        if (be32_to_cpu(gc->len) >= 0x22) {
 737                if (gc->is_PCI)
 738                        hd->bustype = IS_PCI;
 739                else if (gc->is_EISA)
 740                        hd->bustype = IS_EISA;
 741                else
 742                        hd->bustype = IS_ISA;
 743        } else {
 744                if (buff[21] == '4')
 745                        hd->bustype = IS_PCI;
 746                else if (buff[21] == '2')
 747                        hd->bustype = IS_EISA;
 748                else
 749                        hd->bustype = IS_ISA;
 750        }
 751
 752        SD(sh)->cplen = cplen;
 753        SD(sh)->cppadlen = cppadlen;
 754        SD(sh)->hostid = gc->scsi_id[3];
 755        SD(sh)->devflags = 1 << gc->scsi_id[3];
 756        SD(sh)->moresupport = gc->MORE_support;
 757        sh->unique_id = base;
 758        sh->base = base;
 759        sh->io_port = base;
 760        sh->n_io_port = 9;
 761        sh->irq = gc->IRQ;
 762        sh->dma_channel = PIO;
 763        sh->this_id = gc->scsi_id[3];
 764        sh->can_queue = 1;
 765        sh->cmd_per_lun = 1;
 766        sh->sg_tablesize = SG_ALL;
 767
 768        hd->channel = 0;
 769
 770        hd->pdev = pci_dev_get(pdev);   /* Keep a PCI reference */
 771
 772        sh->max_id = 8;
 773        sh->max_lun = 8;
 774
 775        if (gc->SECOND)
 776                hd->primary = 0;
 777        else
 778                hd->primary = 1;
 779
 780        hd->next = NULL;        /* build a linked list of all HBAs */
 781        hd->prev = last_HBA;
 782        if (hd->prev != NULL)
 783                SD(hd->prev)->next = sh;
 784        last_HBA = sh;
 785        if (first_HBA == NULL)
 786                first_HBA = sh;
 787        registered_HBAs++;
 788        return (1);
 789}
 790
 791static void find_pio_ISA(struct get_conf *buf)
 792{
 793        int i;
 794
 795        for (i = 0; i < MAXISA; i++) {
 796                if (!ISAbases[i])
 797                        continue;
 798                if (!get_pio_conf_PIO(ISAbases[i], buf))
 799                        continue;
 800                if (!register_pio_HBA(ISAbases[i], buf, NULL))
 801                        release_region(ISAbases[i], 9);
 802                else
 803                        ISAbases[i] = 0;
 804        }
 805        return;
 806}
 807
 808static void find_pio_EISA(struct get_conf *buf)
 809{
 810        u32 base;
 811        int i;
 812
 813#ifdef CHECKPAL
 814        u8 pal1, pal2, pal3;
 815#endif
 816
 817        for (i = 0; i < MAXEISA; i++) {
 818                if (EISAbases[i]) {     /* Still a possibility ?          */
 819
 820                        base = 0x1c88 + (i * 0x1000);
 821#ifdef CHECKPAL
 822                        pal1 = inb((u16) base - 8);
 823                        pal2 = inb((u16) base - 7);
 824                        pal3 = inb((u16) base - 6);
 825
 826                        if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
 827                                DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
 828#endif
 829                                if (get_pio_conf_PIO(base, buf)) {
 830                                        DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
 831                                        if (buf->IRQ) {
 832                                                if (!register_pio_HBA(base, buf, NULL))
 833                                                        release_region(base, 9);
 834                                        } else {
 835                                                printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
 836                                                release_region(base, 9);
 837                                        }
 838                                }
 839                                /* Nothing found here so we take it from the list */
 840                                EISAbases[i] = 0;
 841#ifdef CHECKPAL
 842                        }
 843#endif
 844                }
 845        }
 846        return;
 847}
 848
 849static void find_pio_PCI(struct get_conf *buf)
 850{
 851#ifndef CONFIG_PCI
 852        printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
 853#else
 854        struct pci_dev *dev = NULL;
 855        unsigned long base, x;
 856
 857        while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
 858                DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
 859                if (pci_enable_device(dev))
 860                        continue;
 861                pci_set_master(dev);
 862                base = pci_resource_flags(dev, 0);
 863                if (base & IORESOURCE_MEM) {
 864                        printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
 865                        continue;
 866                }
 867                base = pci_resource_start(dev, 0);
 868                /* EISA tag there ? */
 869                if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
 870                        continue;       /* Jep, it's forced, so move on  */
 871                base += 0x10;   /* Now, THIS is the real address */
 872                if (base != 0x1f8) {
 873                        /* We didn't find it in the primary search */
 874                        if (get_pio_conf_PIO(base, buf)) {
 875                                if (buf->FORCADR) {     /* If the address is forced */
 876                                        release_region(base, 9);
 877                                        continue;       /* we'll find it later      */
 878                                }
 879
 880                                /* OK. We made it till here, so we can go now  
 881                                 * and register it. We  only have to check and 
 882                                 * eventually remove it from the EISA and ISA list 
 883                                 */
 884
 885                                if (!register_pio_HBA(base, buf, dev)) {
 886                                        release_region(base, 9);
 887                                        continue;
 888                                }
 889
 890                                if (base < 0x1000) {
 891                                        for (x = 0; x < MAXISA; ++x) {
 892                                                if (ISAbases[x] == base) {
 893                                                        ISAbases[x] = 0;
 894                                                        break;
 895                                                }
 896                                        }
 897                                } else if ((base & 0x0fff) == 0x0c88) {
 898                                        x = (base >> 12) & 0x0f;
 899                                        EISAbases[x] = 0;
 900                                }
 901                        }
 902#ifdef CHECK_BLINK
 903                        else if (check_blink_state(base)) {
 904                                printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
 905                        }
 906#endif
 907                }
 908        }
 909#endif                          /* #ifndef CONFIG_PCI */
 910}
 911
 912static int eata_pio_detect(struct scsi_host_template *tpnt)
 913{
 914        struct Scsi_Host *HBA_ptr;
 915        struct get_conf gc;
 916        int i;
 917
 918        find_pio_PCI(&gc);
 919        find_pio_EISA(&gc);
 920        find_pio_ISA(&gc);
 921
 922        for (i = 0; i < MAXIRQ; i++)
 923                if (reg_IRQ[i])
 924                        request_irq(i, do_eata_pio_int_handler, IRQF_DISABLED, "EATA-PIO", NULL);
 925
 926        HBA_ptr = first_HBA;
 927
 928        if (registered_HBAs != 0) {
 929                printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
 930                       "(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);
 931
 932                printk("Registered HBAs:\n");
 933                printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
 934                for (i = 1; i <= registered_HBAs; i++) {
 935                        printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4lx   %2d   %d   %d   %c"
 936                               "  %2d  %2d  %2d\n",
 937                               HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
 938                               SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
 939                               "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
 940                               HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
 941                               SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
 942                               HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
 943                        HBA_ptr = SD(HBA_ptr)->next;
 944                }
 945        }
 946        return (registered_HBAs);
 947}
 948
 949static struct scsi_host_template driver_template = {
 950        .proc_name              = "eata_pio",
 951        .name                   = "EATA (Extended Attachment) PIO driver",
 952        .show_info              = eata_pio_show_info,
 953        .detect                 = eata_pio_detect,
 954        .release                = eata_pio_release,
 955        .queuecommand           = eata_pio_queue,
 956        .eh_abort_handler       = eata_pio_abort,
 957        .eh_host_reset_handler  = eata_pio_host_reset,
 958        .use_clustering         = ENABLE_CLUSTERING,
 959};
 960
 961MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
 962MODULE_DESCRIPTION("EATA SCSI PIO driver");
 963MODULE_LICENSE("GPL");
 964
 965#include "scsi_module.c"
 966
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