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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"