aha1542.c 47.3 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
/* $Id: aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $
 *  linux/kernel/aha1542.c
 *
 *  Copyright (C) 1992  Tommy Thorn
 *  Copyright (C) 1993, 1994, 1995 Eric Youngdale
 *
 *  Modified by Eric Youngdale
 *        Use request_irq and request_dma to help prevent unexpected conflicts
 *        Set up on-board DMA controller, such that we do not have to
 *        have the bios enabled to use the aha1542.
 *  Modified by David Gentzel
 *        Don't call request_dma if dma mask is 0 (for BusLogic BT-445S VL-Bus
 *        controller).
 *  Modified by Matti Aarnio
 *        Accept parameters from LILO cmd-line. -- 1-Oct-94
 *  Modified by Mike McLagan <mike.mclagan@linux.org>
 *        Recognise extended mode on AHA1542CP, different bit than 1542CF
 *        1-Jan-97
 *  Modified by Bjorn L. Thordarson and Einar Thor Einarsson
 *        Recognize that DMA0 is valid DMA channel -- 13-Jul-98
 *  Modified by Chris Faulhaber <jedgar@fxp.org>
 *        Added module command-line options
 *        19-Jul-99
24
 *  Modified by Adam Fritzler
25
 *        Added proper detection of the AHA-1640 (MCA, now deleted)
Linus Torvalds's avatar
Linus Torvalds committed
26 27 28 29 30 31 32 33 34 35 36 37 38 39
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/isapnp.h>
#include <linux/blkdev.h>
40
#include <linux/slab.h>
Linus Torvalds's avatar
Linus Torvalds committed
41 42 43 44 45 46 47 48 49

#include <asm/dma.h>
#include <asm/io.h>

#include "scsi.h"
#include <scsi/scsi_host.h>
#include "aha1542.h"

#define SCSI_BUF_PA(address)	isa_virt_to_bus(address)
50
#define SCSI_SG_PA(sgent)	(isa_page_to_bus(sg_page((sgent))) + (sgent)->offset)
Linus Torvalds's avatar
Linus Torvalds committed
51

52
#include <linux/stat.h>
Linus Torvalds's avatar
Linus Torvalds committed
53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71

#ifdef DEBUG
#define DEB(x) x
#else
#define DEB(x)
#endif

/*
   static const char RCSid[] = "$Header: /usr/src/linux/kernel/blk_drv/scsi/RCS/aha1542.c,v 1.1 1992/07/24 06:27:38 root Exp root $";
 */

/* The adaptec can be configured for quite a number of addresses, but
   I generally do not want the card poking around at random.  We allow
   two addresses - this allows people to use the Adaptec with a Midi
   card, which also used 0x330 -- can be overridden with LILO! */

#define MAXBOARDS 4		/* Increase this and the sizes of the
				   arrays below, if you need more.. */

72
/* Boards 3,4 slots are reserved for ISAPnP scans */
Linus Torvalds's avatar
Linus Torvalds committed
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101

static unsigned int bases[MAXBOARDS] __initdata = {0x330, 0x334, 0, 0};

/* set by aha1542_setup according to the command line; they also may
   be marked __initdata, but require zero initializers then */

static int setup_called[MAXBOARDS];
static int setup_buson[MAXBOARDS];
static int setup_busoff[MAXBOARDS];
static int setup_dmaspeed[MAXBOARDS] __initdata = { -1, -1, -1, -1 };

/*
 * LILO/Module params:  aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]
 *
 * Where:  <PORTBASE> is any of the valid AHA addresses:
 *                      0x130, 0x134, 0x230, 0x234, 0x330, 0x334
 *         <BUSON>  is the time (in microsecs) that AHA spends on the AT-bus
 *                  when transferring data.  1542A power-on default is 11us,
 *                  valid values are in range: 2..15 (decimal)
 *         <BUSOFF> is the time that AHA spends OFF THE BUS after while
 *                  it is transferring data (not to monopolize the bus).
 *                  Power-on default is 4us, valid range: 1..64 microseconds.
 *         <DMASPEED> Default is jumper selected (1542A: on the J1),
 *                  but experimenter can alter it with this.
 *                  Valid values: 5, 6, 7, 8, 10 (MB/s)
 *                  Factory default is 5 MB/s.
 */

#if defined(MODULE)
102
static bool isapnp = 0;
Linus Torvalds's avatar
Linus Torvalds committed
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145
static int aha1542[] = {0x330, 11, 4, -1};
module_param_array(aha1542, int, NULL, 0);
module_param(isapnp, bool, 0);

static struct isapnp_device_id id_table[] __initdata = {
	{
		ISAPNP_ANY_ID, ISAPNP_ANY_ID,
		ISAPNP_VENDOR('A', 'D', 'P'), ISAPNP_FUNCTION(0x1542),
		0
	},
	{0}
};

MODULE_DEVICE_TABLE(isapnp, id_table);

#else
static int isapnp = 1;
#endif

#define BIOS_TRANSLATION_1632 0	/* Used by some old 1542A boards */
#define BIOS_TRANSLATION_6432 1	/* Default case these days */
#define BIOS_TRANSLATION_25563 2	/* Big disk case */

struct aha1542_hostdata {
	/* This will effectively start both of them at the first mailbox */
	int bios_translation;	/* Mapping bios uses - for compatibility */
	int aha1542_last_mbi_used;
	int aha1542_last_mbo_used;
	Scsi_Cmnd *SCint[AHA1542_MAILBOXES];
	struct mailbox mb[2 * AHA1542_MAILBOXES];
	struct ccb ccb[AHA1542_MAILBOXES];
};

#define HOSTDATA(host) ((struct aha1542_hostdata *) &host->hostdata)

static DEFINE_SPINLOCK(aha1542_lock);



#define WAITnexttimeout 3000000

static void setup_mailboxes(int base_io, struct Scsi_Host *shpnt);
static int aha1542_restart(struct Scsi_Host *shost);
146
static void aha1542_intr_handle(struct Scsi_Host *shost);
Linus Torvalds's avatar
Linus Torvalds committed
147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385

#define aha1542_intr_reset(base)  outb(IRST, CONTROL(base))

#define WAIT(port, mask, allof, noneof)					\
 { register int WAITbits;						\
   register int WAITtimeout = WAITnexttimeout;				\
   while (1) {								\
     WAITbits = inb(port) & (mask);					\
     if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
       break;                                                         	\
     if (--WAITtimeout == 0) goto fail;					\
   }									\
 }

/* Similar to WAIT, except we use the udelay call to regulate the
   amount of time we wait.  */
#define WAITd(port, mask, allof, noneof, timeout)			\
 { register int WAITbits;						\
   register int WAITtimeout = timeout;					\
   while (1) {								\
     WAITbits = inb(port) & (mask);					\
     if ((WAITbits & (allof)) == (allof) && ((WAITbits & (noneof)) == 0)) \
       break;                                                         	\
     mdelay(1);							\
     if (--WAITtimeout == 0) goto fail;					\
   }									\
 }

static void aha1542_stat(void)
{
/*	int s = inb(STATUS), i = inb(INTRFLAGS);
	printk("status=%x intrflags=%x\n", s, i, WAITnexttimeout-WAITtimeout); */
}

/* This is a bit complicated, but we need to make sure that an interrupt
   routine does not send something out while we are in the middle of this.
   Fortunately, it is only at boot time that multi-byte messages
   are ever sent. */
static int aha1542_out(unsigned int base, unchar * cmdp, int len)
{
	unsigned long flags = 0;
	int got_lock;

	if (len == 1) {
		got_lock = 0;
		while (1 == 1) {
			WAIT(STATUS(base), CDF, 0, CDF);
			spin_lock_irqsave(&aha1542_lock, flags);
			if (inb(STATUS(base)) & CDF) {
				spin_unlock_irqrestore(&aha1542_lock, flags);
				continue;
			}
			outb(*cmdp, DATA(base));
			spin_unlock_irqrestore(&aha1542_lock, flags);
			return 0;
		}
	} else {
		spin_lock_irqsave(&aha1542_lock, flags);
		got_lock = 1;
		while (len--) {
			WAIT(STATUS(base), CDF, 0, CDF);
			outb(*cmdp++, DATA(base));
		}
		spin_unlock_irqrestore(&aha1542_lock, flags);
	}
	return 0;
fail:
	if (got_lock)
		spin_unlock_irqrestore(&aha1542_lock, flags);
	printk(KERN_ERR "aha1542_out failed(%d): ", len + 1);
	aha1542_stat();
	return 1;
}

/* Only used at boot time, so we do not need to worry about latency as much
   here */

static int __init aha1542_in(unsigned int base, unchar * cmdp, int len)
{
	unsigned long flags;

	spin_lock_irqsave(&aha1542_lock, flags);
	while (len--) {
		WAIT(STATUS(base), DF, DF, 0);
		*cmdp++ = inb(DATA(base));
	}
	spin_unlock_irqrestore(&aha1542_lock, flags);
	return 0;
fail:
	spin_unlock_irqrestore(&aha1542_lock, flags);
	printk(KERN_ERR "aha1542_in failed(%d): ", len + 1);
	aha1542_stat();
	return 1;
}

/* Similar to aha1542_in, except that we wait a very short period of time.
   We use this if we know the board is alive and awake, but we are not sure
   if the board will respond to the command we are about to send or not */
static int __init aha1542_in1(unsigned int base, unchar * cmdp, int len)
{
	unsigned long flags;

	spin_lock_irqsave(&aha1542_lock, flags);
	while (len--) {
		WAITd(STATUS(base), DF, DF, 0, 100);
		*cmdp++ = inb(DATA(base));
	}
	spin_unlock_irqrestore(&aha1542_lock, flags);
	return 0;
fail:
	spin_unlock_irqrestore(&aha1542_lock, flags);
	return 1;
}

static int makecode(unsigned hosterr, unsigned scsierr)
{
	switch (hosterr) {
	case 0x0:
	case 0xa:		/* Linked command complete without error and linked normally */
	case 0xb:		/* Linked command complete without error, interrupt generated */
		hosterr = 0;
		break;

	case 0x11:		/* Selection time out-The initiator selection or target
				   reselection was not complete within the SCSI Time out period */
		hosterr = DID_TIME_OUT;
		break;

	case 0x12:		/* Data overrun/underrun-The target attempted to transfer more data
				   than was allocated by the Data Length field or the sum of the
				   Scatter / Gather Data Length fields. */

	case 0x13:		/* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */

	case 0x15:		/* MBO command was not 00, 01 or 02-The first byte of the CB was
				   invalid. This usually indicates a software failure. */

	case 0x16:		/* Invalid CCB Operation Code-The first byte of the CCB was invalid.
				   This usually indicates a software failure. */

	case 0x17:		/* Linked CCB does not have the same LUN-A subsequent CCB of a set
				   of linked CCB's does not specify the same logical unit number as
				   the first. */
	case 0x18:		/* Invalid Target Direction received from Host-The direction of a
				   Target Mode CCB was invalid. */

	case 0x19:		/* Duplicate CCB Received in Target Mode-More than once CCB was
				   received to service data transfer between the same target LUN
				   and initiator SCSI ID in the same direction. */

	case 0x1a:		/* Invalid CCB or Segment List Parameter-A segment list with a zero
				   length segment or invalid segment list boundaries was received.
				   A CCB parameter was invalid. */
		DEB(printk("Aha1542: %x %x\n", hosterr, scsierr));
		hosterr = DID_ERROR;	/* Couldn't find any better */
		break;

	case 0x14:		/* Target bus phase sequence failure-An invalid bus phase or bus
				   phase sequence was requested by the target. The host adapter
				   will generate a SCSI Reset Condition, notifying the host with
				   a SCRD interrupt */
		hosterr = DID_RESET;
		break;
	default:
		printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr);
		break;
	}
	return scsierr | (hosterr << 16);
}

static int __init aha1542_test_port(int bse, struct Scsi_Host *shpnt)
{
	unchar inquiry_cmd[] = {CMD_INQUIRY};
	unchar inquiry_result[4];
	unchar *cmdp;
	int len;
	volatile int debug = 0;

	/* Quick and dirty test for presence of the card. */
	if (inb(STATUS(bse)) == 0xff)
		return 0;

	/* Reset the adapter. I ought to make a hard reset, but it's not really necessary */

	/*  DEB(printk("aha1542_test_port called \n")); */

	/* In case some other card was probing here, reset interrupts */
	aha1542_intr_reset(bse);	/* reset interrupts, so they don't block */

	outb(SRST | IRST /*|SCRST */ , CONTROL(bse));

	mdelay(20);		/* Wait a little bit for things to settle down. */

	debug = 1;
	/* Expect INIT and IDLE, any of the others are bad */
	WAIT(STATUS(bse), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);

	debug = 2;
	/* Shouldn't have generated any interrupts during reset */
	if (inb(INTRFLAGS(bse)) & INTRMASK)
		goto fail;


	/* Perform a host adapter inquiry instead so we do not need to set
	   up the mailboxes ahead of time */

	aha1542_out(bse, inquiry_cmd, 1);

	debug = 3;
	len = 4;
	cmdp = &inquiry_result[0];

	while (len--) {
		WAIT(STATUS(bse), DF, DF, 0);
		*cmdp++ = inb(DATA(bse));
	}

	debug = 8;
	/* Reading port should reset DF */
	if (inb(STATUS(bse)) & DF)
		goto fail;

	debug = 9;
	/* When HACC, command is completed, and we're though testing */
	WAIT(INTRFLAGS(bse), HACC, HACC, 0);
	/* now initialize adapter */

	debug = 10;
	/* Clear interrupts */
	outb(IRST, CONTROL(bse));

	debug = 11;

	return debug;		/* 1 = ok */
fail:
	return 0;		/* 0 = not ok */
}

/* A quick wrapper for do_aha1542_intr_handle to grab the spin lock */
386
static irqreturn_t do_aha1542_intr_handle(int dummy, void *dev_id)
Linus Torvalds's avatar
Linus Torvalds committed
387 388
{
	unsigned long flags;
389
	struct Scsi_Host *shost = dev_id;
Linus Torvalds's avatar
Linus Torvalds committed
390 391

	spin_lock_irqsave(shost->host_lock, flags);
392
	aha1542_intr_handle(shost);
Linus Torvalds's avatar
Linus Torvalds committed
393 394 395 396 397
	spin_unlock_irqrestore(shost->host_lock, flags);
	return IRQ_HANDLED;
}

/* A "high" level interrupt handler */
398
static void aha1542_intr_handle(struct Scsi_Host *shost)
Linus Torvalds's avatar
Linus Torvalds committed
399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506
{
	void (*my_done) (Scsi_Cmnd *) = NULL;
	int errstatus, mbi, mbo, mbistatus;
	int number_serviced;
	unsigned long flags;
	Scsi_Cmnd *SCtmp;
	int flag;
	int needs_restart;
	struct mailbox *mb;
	struct ccb *ccb;

	mb = HOSTDATA(shost)->mb;
	ccb = HOSTDATA(shost)->ccb;

#ifdef DEBUG
	{
		flag = inb(INTRFLAGS(shost->io_port));
		printk(KERN_DEBUG "aha1542_intr_handle: ");
		if (!(flag & ANYINTR))
			printk("no interrupt?");
		if (flag & MBIF)
			printk("MBIF ");
		if (flag & MBOA)
			printk("MBOF ");
		if (flag & HACC)
			printk("HACC ");
		if (flag & SCRD)
			printk("SCRD ");
		printk("status %02x\n", inb(STATUS(shost->io_port)));
	};
#endif
	number_serviced = 0;
	needs_restart = 0;

	while (1 == 1) {
		flag = inb(INTRFLAGS(shost->io_port));

		/* Check for unusual interrupts.  If any of these happen, we should
		   probably do something special, but for now just printing a message
		   is sufficient.  A SCSI reset detected is something that we really
		   need to deal with in some way. */
		if (flag & ~MBIF) {
			if (flag & MBOA)
				printk("MBOF ");
			if (flag & HACC)
				printk("HACC ");
			if (flag & SCRD) {
				needs_restart = 1;
				printk("SCRD ");
			}
		}
		aha1542_intr_reset(shost->io_port);

		spin_lock_irqsave(&aha1542_lock, flags);
		mbi = HOSTDATA(shost)->aha1542_last_mbi_used + 1;
		if (mbi >= 2 * AHA1542_MAILBOXES)
			mbi = AHA1542_MAILBOXES;

		do {
			if (mb[mbi].status != 0)
				break;
			mbi++;
			if (mbi >= 2 * AHA1542_MAILBOXES)
				mbi = AHA1542_MAILBOXES;
		} while (mbi != HOSTDATA(shost)->aha1542_last_mbi_used);

		if (mb[mbi].status == 0) {
			spin_unlock_irqrestore(&aha1542_lock, flags);
			/* Hmm, no mail.  Must have read it the last time around */
			if (!number_serviced && !needs_restart)
				printk(KERN_WARNING "aha1542.c: interrupt received, but no mail.\n");
			/* We detected a reset.  Restart all pending commands for
			   devices that use the hard reset option */
			if (needs_restart)
				aha1542_restart(shost);
			return;
		};

		mbo = (scsi2int(mb[mbi].ccbptr) - (SCSI_BUF_PA(&ccb[0]))) / sizeof(struct ccb);
		mbistatus = mb[mbi].status;
		mb[mbi].status = 0;
		HOSTDATA(shost)->aha1542_last_mbi_used = mbi;
		spin_unlock_irqrestore(&aha1542_lock, flags);

#ifdef DEBUG
		{
			if (ccb[mbo].tarstat | ccb[mbo].hastat)
				printk(KERN_DEBUG "aha1542_command: returning %x (status %d)\n",
				       ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
		};
#endif

		if (mbistatus == 3)
			continue;	/* Aborted command not found */

#ifdef DEBUG
		printk(KERN_DEBUG "...done %d %d\n", mbo, mbi);
#endif

		SCtmp = HOSTDATA(shost)->SCint[mbo];

		if (!SCtmp || !SCtmp->scsi_done) {
			printk(KERN_WARNING "aha1542_intr_handle: Unexpected interrupt\n");
			printk(KERN_WARNING "tarstat=%x, hastat=%x idlun=%x ccb#=%d \n", ccb[mbo].tarstat,
			       ccb[mbo].hastat, ccb[mbo].idlun, mbo);
			return;
		}
		my_done = SCtmp->scsi_done;
507 508
		kfree(SCtmp->host_scribble);
		SCtmp->host_scribble = NULL;
Linus Torvalds's avatar
Linus Torvalds committed
509 510 511 512 513
		/* Fetch the sense data, and tuck it away, in the required slot.  The
		   Adaptec automatically fetches it, and there is no guarantee that
		   we will still have it in the cdb when we come back */
		if (ccb[mbo].tarstat == 2)
			memcpy(SCtmp->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
514
			       SCSI_SENSE_BUFFERSIZE);
Linus Torvalds's avatar
Linus Torvalds committed
515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557


		/* is there mail :-) */

		/* more error checking left out here */
		if (mbistatus != 1)
			/* This is surely wrong, but I don't know what's right */
			errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
		else
			errstatus = 0;

#ifdef DEBUG
		if (errstatus)
			printk(KERN_DEBUG "(aha1542 error:%x %x %x) ", errstatus,
			       ccb[mbo].hastat, ccb[mbo].tarstat);
#endif

		if (ccb[mbo].tarstat == 2) {
#ifdef DEBUG
			int i;
#endif
			DEB(printk("aha1542_intr_handle: sense:"));
#ifdef DEBUG
			for (i = 0; i < 12; i++)
				printk("%02x ", ccb[mbo].cdb[ccb[mbo].cdblen + i]);
			printk("\n");
#endif
			/*
			   DEB(printk("aha1542_intr_handle: buf:"));
			   for (i = 0; i < bufflen; i++)
			   printk("%02x ", ((unchar *)buff)[i]);
			   printk("\n");
			 */
		}
		DEB(if (errstatus) printk("aha1542_intr_handle: returning %6x\n", errstatus));
		SCtmp->result = errstatus;
		HOSTDATA(shost)->SCint[mbo] = NULL;	/* This effectively frees up the mailbox slot, as
							   far as queuecommand is concerned */
		my_done(SCtmp);
		number_serviced++;
	};
}

Jeff Garzik's avatar
Jeff Garzik committed
558
static int aha1542_queuecommand_lck(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
Linus Torvalds's avatar
Linus Torvalds committed
559 560 561 562 563 564 565
{
	unchar ahacmd = CMD_START_SCSI;
	unchar direction;
	unchar *cmd = (unchar *) SCpnt->cmnd;
	unchar target = SCpnt->device->id;
	unchar lun = SCpnt->device->lun;
	unsigned long flags;
566
	int bufflen = scsi_bufflen(SCpnt);
Linus Torvalds's avatar
Linus Torvalds committed
567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586
	int mbo;
	struct mailbox *mb;
	struct ccb *ccb;

	DEB(int i);

	mb = HOSTDATA(SCpnt->device->host)->mb;
	ccb = HOSTDATA(SCpnt->device->host)->ccb;

	DEB(if (target > 1) {
	    SCpnt->result = DID_TIME_OUT << 16;
	    done(SCpnt); return 0;
	    }
	);

	if (*cmd == REQUEST_SENSE) {
		/* Don't do the command - we have the sense data already */
#if 0
		/* scsi_request_sense() provides a buffer of size 256,
		   so there is no reason to expect equality */
587
		if (bufflen != SCSI_SENSE_BUFFERSIZE)
Linus Torvalds's avatar
Linus Torvalds committed
588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
			printk(KERN_CRIT "aha1542: Wrong buffer length supplied "
			       "for request sense (%d)\n", bufflen);
#endif
		SCpnt->result = 0;
		done(SCpnt);
		return 0;
	}
#ifdef DEBUG
	if (*cmd == READ_10 || *cmd == WRITE_10)
		i = xscsi2int(cmd + 2);
	else if (*cmd == READ_6 || *cmd == WRITE_6)
		i = scsi2int(cmd + 2);
	else
		i = -1;
	if (done)
		printk(KERN_DEBUG "aha1542_queuecommand: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
	else
		printk(KERN_DEBUG "aha1542_command: dev %d cmd %02x pos %d len %d ", target, *cmd, i, bufflen);
	aha1542_stat();
	printk(KERN_DEBUG "aha1542_queuecommand: dumping scsi cmd:");
	for (i = 0; i < SCpnt->cmd_len; i++)
		printk("%02x ", cmd[i]);
	printk("\n");
	if (*cmd == WRITE_10 || *cmd == WRITE_6)
		return 0;	/* we are still testing, so *don't* write */
#endif
	/* Use the outgoing mailboxes in a round-robin fashion, because this
	   is how the host adapter will scan for them */

	spin_lock_irqsave(&aha1542_lock, flags);
	mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1;
	if (mbo >= AHA1542_MAILBOXES)
		mbo = 0;

	do {
		if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL)
			break;
		mbo++;
		if (mbo >= AHA1542_MAILBOXES)
			mbo = 0;
	} while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used);

	if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo])
		panic("Unable to find empty mailbox for aha1542.\n");

	HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt;	/* This will effectively prevent someone else from
							   screwing with this cdb. */

	HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo;
	spin_unlock_irqrestore(&aha1542_lock, flags);

#ifdef DEBUG
	printk(KERN_DEBUG "Sending command (%d %x)...", mbo, done);
#endif

	any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo]));	/* This gets trashed for some reason */

	memset(&ccb[mbo], 0, sizeof(struct ccb));

	ccb[mbo].cdblen = SCpnt->cmd_len;

	direction = 0;
	if (*cmd == READ_10 || *cmd == READ_6)
		direction = 8;
	else if (*cmd == WRITE_10 || *cmd == WRITE_6)
		direction = 16;

	memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen);

657
	if (bufflen) {
658
		struct scatterlist *sg;
Linus Torvalds's avatar
Linus Torvalds committed
659 660 661 662
		struct chain *cptr;
#ifdef DEBUG
		unsigned char *ptr;
#endif
663
		int i, sg_count = scsi_sg_count(SCpnt);
Linus Torvalds's avatar
Linus Torvalds committed
664
		ccb[mbo].op = 2;	/* SCSI Initiator Command  w/scatter-gather */
665 666
		SCpnt->host_scribble = kmalloc(sizeof(*cptr)*sg_count,
		                                         GFP_KERNEL | GFP_DMA);
Linus Torvalds's avatar
Linus Torvalds committed
667 668 669 670 671 672
		cptr = (struct chain *) SCpnt->host_scribble;
		if (cptr == NULL) {
			/* free the claimed mailbox slot */
			HOSTDATA(SCpnt->device->host)->SCint[mbo] = NULL;
			return SCSI_MLQUEUE_HOST_BUSY;
		}
673
		scsi_for_each_sg(SCpnt, sg, sg_count, i) {
674 675
			any2scsi(cptr[i].dataptr, SCSI_SG_PA(sg));
			any2scsi(cptr[i].datalen, sg->length);
Linus Torvalds's avatar
Linus Torvalds committed
676
		};
677
		any2scsi(ccb[mbo].datalen, sg_count * sizeof(struct chain));
Linus Torvalds's avatar
Linus Torvalds committed
678 679 680 681 682 683 684 685 686 687
		any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(cptr));
#ifdef DEBUG
		printk("cptr %x: ", cptr);
		ptr = (unsigned char *) cptr;
		for (i = 0; i < 18; i++)
			printk("%02x ", ptr[i]);
#endif
	} else {
		ccb[mbo].op = 0;	/* SCSI Initiator Command */
		SCpnt->host_scribble = NULL;
688 689
		any2scsi(ccb[mbo].datalen, 0);
		any2scsi(ccb[mbo].dataptr, 0);
Linus Torvalds's avatar
Linus Torvalds committed
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717
	};
	ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7);	/*SCSI Target Id */
	ccb[mbo].rsalen = 16;
	ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
	ccb[mbo].commlinkid = 0;

#ifdef DEBUG
	{
		int i;
		printk(KERN_DEBUG "aha1542_command: sending.. ");
		for (i = 0; i < sizeof(ccb[mbo]) - 10; i++)
			printk("%02x ", ((unchar *) & ccb[mbo])[i]);
	};
#endif

	if (done) {
		DEB(printk("aha1542_queuecommand: now waiting for interrupt ");
		    aha1542_stat());
		SCpnt->scsi_done = done;
		mb[mbo].status = 1;
		aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1);	/* start scsi command */
		DEB(aha1542_stat());
	} else
		printk("aha1542_queuecommand: done can't be NULL\n");

	return 0;
}

Jeff Garzik's avatar
Jeff Garzik committed
718 719
static DEF_SCSI_QCMD(aha1542_queuecommand)

Linus Torvalds's avatar
Linus Torvalds committed
720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955
/* Initialize mailboxes */
static void setup_mailboxes(int bse, struct Scsi_Host *shpnt)
{
	int i;
	struct mailbox *mb;
	struct ccb *ccb;

	unchar cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};

	mb = HOSTDATA(shpnt)->mb;
	ccb = HOSTDATA(shpnt)->ccb;

	for (i = 0; i < AHA1542_MAILBOXES; i++) {
		mb[i].status = mb[AHA1542_MAILBOXES + i].status = 0;
		any2scsi(mb[i].ccbptr, SCSI_BUF_PA(&ccb[i]));
	};
	aha1542_intr_reset(bse);	/* reset interrupts, so they don't block */
	any2scsi((cmd + 2), SCSI_BUF_PA(mb));
	aha1542_out(bse, cmd, 5);
	WAIT(INTRFLAGS(bse), INTRMASK, HACC, 0);
	while (0) {
fail:
		printk(KERN_ERR "aha1542_detect: failed setting up mailboxes\n");
	}
	aha1542_intr_reset(bse);
}

static int __init aha1542_getconfig(int base_io, unsigned char *irq_level, unsigned char *dma_chan, unsigned char *scsi_id)
{
	unchar inquiry_cmd[] = {CMD_RETCONF};
	unchar inquiry_result[3];
	int i;
	i = inb(STATUS(base_io));
	if (i & DF) {
		i = inb(DATA(base_io));
	};
	aha1542_out(base_io, inquiry_cmd, 1);
	aha1542_in(base_io, inquiry_result, 3);
	WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
	while (0) {
fail:
		printk(KERN_ERR "aha1542_detect: query board settings\n");
	}
	aha1542_intr_reset(base_io);
	switch (inquiry_result[0]) {
	case 0x80:
		*dma_chan = 7;
		break;
	case 0x40:
		*dma_chan = 6;
		break;
	case 0x20:
		*dma_chan = 5;
		break;
	case 0x01:
		*dma_chan = 0;
		break;
	case 0:
		/* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
		   Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */
		*dma_chan = 0xFF;
		break;
	default:
		printk(KERN_ERR "Unable to determine Adaptec DMA priority.  Disabling board\n");
		return -1;
	};
	switch (inquiry_result[1]) {
	case 0x40:
		*irq_level = 15;
		break;
	case 0x20:
		*irq_level = 14;
		break;
	case 0x8:
		*irq_level = 12;
		break;
	case 0x4:
		*irq_level = 11;
		break;
	case 0x2:
		*irq_level = 10;
		break;
	case 0x1:
		*irq_level = 9;
		break;
	default:
		printk(KERN_ERR "Unable to determine Adaptec IRQ level.  Disabling board\n");
		return -1;
	};
	*scsi_id = inquiry_result[2] & 7;
	return 0;
}

/* This function should only be called for 1542C boards - we can detect
   the special firmware settings and unlock the board */

static int __init aha1542_mbenable(int base)
{
	static unchar mbenable_cmd[3];
	static unchar mbenable_result[2];
	int retval;

	retval = BIOS_TRANSLATION_6432;

	mbenable_cmd[0] = CMD_EXTBIOS;
	aha1542_out(base, mbenable_cmd, 1);
	if (aha1542_in1(base, mbenable_result, 2))
		return retval;
	WAITd(INTRFLAGS(base), INTRMASK, HACC, 0, 100);
	aha1542_intr_reset(base);

	if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
		mbenable_cmd[0] = CMD_MBENABLE;
		mbenable_cmd[1] = 0;
		mbenable_cmd[2] = mbenable_result[1];

		if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
			retval = BIOS_TRANSLATION_25563;

		aha1542_out(base, mbenable_cmd, 3);
		WAIT(INTRFLAGS(base), INTRMASK, HACC, 0);
	};
	while (0) {
fail:
		printk(KERN_ERR "aha1542_mbenable: Mailbox init failed\n");
	}
	aha1542_intr_reset(base);
	return retval;
}

/* Query the board to find out if it is a 1542 or a 1740, or whatever. */
static int __init aha1542_query(int base_io, int *transl)
{
	unchar inquiry_cmd[] = {CMD_INQUIRY};
	unchar inquiry_result[4];
	int i;
	i = inb(STATUS(base_io));
	if (i & DF) {
		i = inb(DATA(base_io));
	};
	aha1542_out(base_io, inquiry_cmd, 1);
	aha1542_in(base_io, inquiry_result, 4);
	WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
	while (0) {
fail:
		printk(KERN_ERR "aha1542_detect: query card type\n");
	}
	aha1542_intr_reset(base_io);

	*transl = BIOS_TRANSLATION_6432;	/* Default case */

	/* For an AHA1740 series board, we ignore the board since there is a
	   hardware bug which can lead to wrong blocks being returned if the board
	   is operating in the 1542 emulation mode.  Since there is an extended mode
	   driver, we simply ignore the board and let the 1740 driver pick it up.
	 */

	if (inquiry_result[0] == 0x43) {
		printk(KERN_INFO "aha1542.c: Emulation mode not supported for AHA 174N hardware.\n");
		return 1;
	};

	/* Always call this - boards that do not support extended bios translation
	   will ignore the command, and we will set the proper default */

	*transl = aha1542_mbenable(base_io);

	return 0;
}

#ifndef MODULE
static char *setup_str[MAXBOARDS] __initdata;
static int setup_idx = 0;

static void __init aha1542_setup(char *str, int *ints)
{
	const char *ahausage = "aha1542: usage: aha1542=<PORTBASE>[,<BUSON>,<BUSOFF>[,<DMASPEED>]]\n";
	int setup_portbase;

	if (setup_idx >= MAXBOARDS) {
		printk(KERN_ERR "aha1542: aha1542_setup called too many times! Bad LILO params ?\n");
		printk(KERN_ERR "   Entryline 1: %s\n", setup_str[0]);
		printk(KERN_ERR "   Entryline 2: %s\n", setup_str[1]);
		printk(KERN_ERR "   This line:   %s\n", str);
		return;
	}
	if (ints[0] < 1 || ints[0] > 4) {
		printk(KERN_ERR "aha1542: %s\n", str);
		printk(ahausage);
		printk(KERN_ERR "aha1542: Wrong parameters may cause system malfunction.. We try anyway..\n");
	}
	setup_called[setup_idx] = ints[0];
	setup_str[setup_idx] = str;

	setup_portbase = ints[0] >= 1 ? ints[1] : 0;	/* Preserve the default value.. */
	setup_buson[setup_idx] = ints[0] >= 2 ? ints[2] : 7;
	setup_busoff[setup_idx] = ints[0] >= 3 ? ints[3] : 5;
	if (ints[0] >= 4) 
	{
		int atbt = -1;
		switch (ints[4]) {
		case 5:
			atbt = 0x00;
			break;
		case 6:
			atbt = 0x04;
			break;
		case 7:
			atbt = 0x01;
			break;
		case 8:
			atbt = 0x02;
			break;
		case 10:
			atbt = 0x03;
			break;
		default:
			printk(KERN_ERR "aha1542: %s\n", str);
			printk(ahausage);
			printk(KERN_ERR "aha1542: Valid values for DMASPEED are 5-8, 10 MB/s.  Using jumper defaults.\n");
			break;
		}
		setup_dmaspeed[setup_idx] = atbt;
	}
	if (setup_portbase != 0)
		bases[setup_idx] = setup_portbase;

	++setup_idx;
}

static int __init do_setup(char *str)
{
	int ints[5];

	int count=setup_idx;

956
	get_options(str, ARRAY_SIZE(ints), ints);
Linus Torvalds's avatar
Linus Torvalds committed
957 958 959 960 961 962 963 964 965
	aha1542_setup(str,ints);

	return count<setup_idx;
}

__setup("aha1542=",do_setup);
#endif

/* return non-zero on detection */
966
static int __init aha1542_detect(struct scsi_host_template * tpnt)
Linus Torvalds's avatar
Linus Torvalds committed
967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011
{
	unsigned char dma_chan;
	unsigned char irq_level;
	unsigned char scsi_id;
	unsigned long flags;
	unsigned int base_io;
	int trans;
	struct Scsi_Host *shpnt = NULL;
	int count = 0;
	int indx;

	DEB(printk("aha1542_detect: \n"));

	tpnt->proc_name = "aha1542";

#ifdef MODULE
	bases[0] = aha1542[0];
	setup_buson[0] = aha1542[1];
	setup_busoff[0] = aha1542[2];
	{
		int atbt = -1;
		switch (aha1542[3]) {
		case 5:
			atbt = 0x00;
			break;
		case 6:
			atbt = 0x04;
			break;
		case 7:
			atbt = 0x01;
			break;
		case 8:
			atbt = 0x02;
			break;
		case 10:
			atbt = 0x03;
			break;
		};
		setup_dmaspeed[0] = atbt;
	}
#endif

	/*
	 *	Hunt for ISA Plug'n'Pray Adaptecs (AHA1535)
	 */
1012

Linus Torvalds's avatar
Linus Torvalds committed
1013 1014 1015
	if(isapnp)
	{
		struct pnp_dev *pdev = NULL;
1016
		for(indx = 0; indx < ARRAY_SIZE(bases); indx++) {
Linus Torvalds's avatar
Linus Torvalds committed
1017 1018 1019 1020 1021 1022 1023 1024 1025
			if(bases[indx])
				continue;
			pdev = pnp_find_dev(NULL, ISAPNP_VENDOR('A', 'D', 'P'), 
				ISAPNP_FUNCTION(0x1542), pdev);
			if(pdev==NULL)
				break;
			/*
			 *	Activate the PnP card
			 */
1026

Linus Torvalds's avatar
Linus Torvalds committed
1027 1028
			if(pnp_device_attach(pdev)<0)
				continue;
1029

Linus Torvalds's avatar
Linus Torvalds committed
1030 1031 1032 1033
			if(pnp_activate_dev(pdev)<0) {
				pnp_device_detach(pdev);
				continue;
			}
1034

Linus Torvalds's avatar
Linus Torvalds committed
1035 1036 1037 1038
			if(!pnp_port_valid(pdev, 0)) {
				pnp_device_detach(pdev);
				continue;
			}
1039

Linus Torvalds's avatar
Linus Torvalds committed
1040
			bases[indx] = pnp_port_start(pdev, 0);
1041

Linus Torvalds's avatar
Linus Torvalds committed
1042 1043
			/* The card can be queried for its DMA, we have 
			   the DMA set up that is enough */
1044

Linus Torvalds's avatar
Linus Torvalds committed
1045 1046 1047
			printk(KERN_INFO "ISAPnP found an AHA1535 at I/O 0x%03X\n", bases[indx]);
		}
	}
1048
	for (indx = 0; indx < ARRAY_SIZE(bases); indx++)
Linus Torvalds's avatar
Linus Torvalds committed
1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
		if (bases[indx] != 0 && request_region(bases[indx], 4, "aha1542")) {
			shpnt = scsi_register(tpnt,
					sizeof(struct aha1542_hostdata));

			if(shpnt==NULL) {
				release_region(bases[indx], 4);
				continue;
			}
			if (!aha1542_test_port(bases[indx], shpnt))
				goto unregister;

			base_io = bases[indx];

			/* Set the Bus on/off-times as not to ruin floppy performance */
			{
				unchar oncmd[] = {CMD_BUSON_TIME, 7};
				unchar offcmd[] = {CMD_BUSOFF_TIME, 5};

				if (setup_called[indx]) {
					oncmd[1] = setup_buson[indx];
					offcmd[1] = setup_busoff[indx];
				}
				aha1542_intr_reset(base_io);
				aha1542_out(base_io, oncmd, 2);
				WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
				aha1542_intr_reset(base_io);
				aha1542_out(base_io, offcmd, 2);
				WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
				if (setup_dmaspeed[indx] >= 0) {
					unchar dmacmd[] = {CMD_DMASPEED, 0};
					dmacmd[1] = setup_dmaspeed[indx];
					aha1542_intr_reset(base_io);
					aha1542_out(base_io, dmacmd, 2);
					WAIT(INTRFLAGS(base_io), INTRMASK, HACC, 0);
				}
				while (0) {
fail:
					printk(KERN_ERR "aha1542_detect: setting bus on/off-time failed\n");
				}
				aha1542_intr_reset(base_io);
			}
			if (aha1542_query(base_io, &trans))
				goto unregister;

			if (aha1542_getconfig(base_io, &irq_level, &dma_chan, &scsi_id) == -1)
				goto unregister;

			printk(KERN_INFO "Configuring Adaptec (SCSI-ID %d) at IO:%x, IRQ %d", scsi_id, base_io, irq_level);
			if (dma_chan != 0xFF)
				printk(", DMA priority %d", dma_chan);
			printk("\n");

			DEB(aha1542_stat());
			setup_mailboxes(base_io, shpnt);

			DEB(aha1542_stat());

			DEB(printk("aha1542_detect: enable interrupt channel %d\n", irq_level));
			spin_lock_irqsave(&aha1542_lock, flags);
1108 1109
			if (request_irq(irq_level, do_aha1542_intr_handle, 0,
					"aha1542", shpnt)) {
Linus Torvalds's avatar
Linus Torvalds committed
1110 1111 1112 1113 1114 1115 1116
				printk(KERN_ERR "Unable to allocate IRQ for adaptec controller.\n");
				spin_unlock_irqrestore(&aha1542_lock, flags);
				goto unregister;
			}
			if (dma_chan != 0xFF) {
				if (request_dma(dma_chan, "aha1542")) {
					printk(KERN_ERR "Unable to allocate DMA channel for Adaptec.\n");
1117
					free_irq(irq_level, shpnt);
Linus Torvalds's avatar
Linus Torvalds committed
1118 1119 1120 1121 1122 1123 1124 1125
					spin_unlock_irqrestore(&aha1542_lock, flags);
					goto unregister;
				}
				if (dma_chan == 0 || dma_chan >= 5) {
					set_dma_mode(dma_chan, DMA_MODE_CASCADE);
					enable_dma(dma_chan);
				}
			}
1126

Linus Torvalds's avatar
Linus Torvalds committed
1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187
			shpnt->this_id = scsi_id;
			shpnt->unique_id = base_io;
			shpnt->io_port = base_io;
			shpnt->n_io_port = 4;	/* Number of bytes of I/O space used */
			shpnt->dma_channel = dma_chan;
			shpnt->irq = irq_level;
			HOSTDATA(shpnt)->bios_translation = trans;
			if (trans == BIOS_TRANSLATION_25563)
				printk(KERN_INFO "aha1542.c: Using extended bios translation\n");
			HOSTDATA(shpnt)->aha1542_last_mbi_used = (2 * AHA1542_MAILBOXES - 1);
			HOSTDATA(shpnt)->aha1542_last_mbo_used = (AHA1542_MAILBOXES - 1);
			memset(HOSTDATA(shpnt)->SCint, 0, sizeof(HOSTDATA(shpnt)->SCint));
			spin_unlock_irqrestore(&aha1542_lock, flags);
#if 0
			DEB(printk(" *** READ CAPACITY ***\n"));

			{
				unchar buf[8];
				static unchar cmd[] = { READ_CAPACITY, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
				int i;

				for (i = 0; i < sizeof(buf); ++i)
					buf[i] = 0x87;
				for (i = 0; i < 2; ++i)
					if (!aha1542_command(i, cmd, buf, sizeof(buf))) {
						printk(KERN_DEBUG "aha_detect: LU %d sector_size %d device_size %d\n",
						       i, xscsi2int(buf + 4), xscsi2int(buf));
					}
			}

			DEB(printk(" *** NOW RUNNING MY OWN TEST *** \n"));

			for (i = 0; i < 4; ++i) {
				unsigned char cmd[10];
				static buffer[512];

				cmd[0] = READ_10;
				cmd[1] = 0;
				xany2scsi(cmd + 2, i);
				cmd[6] = 0;
				cmd[7] = 0;
				cmd[8] = 1;
				cmd[9] = 0;
				aha1542_command(0, cmd, buffer, 512);
			}
#endif
			count++;
			continue;
unregister:
			release_region(bases[indx], 4);
			scsi_unregister(shpnt);
			continue;

		};

	return count;
}

static int aha1542_release(struct Scsi_Host *shost)
{
	if (shost->irq)
1188
		free_irq(shost->irq, shost);
Linus Torvalds's avatar
Linus Torvalds committed
1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
	if (shost->dma_channel != 0xff)
		free_dma(shost->dma_channel);
	if (shost->io_port && shost->n_io_port)
		release_region(shost->io_port, shost->n_io_port);
	scsi_unregister(shost);
	return 0;
}

static int aha1542_restart(struct Scsi_Host *shost)
{
	int i;
	int count = 0;
#if 0
	unchar ahacmd = CMD_START_SCSI;
#endif

	for (i = 0; i < AHA1542_MAILBOXES; i++)
		if (HOSTDATA(shost)->SCint[i] &&
		    !(HOSTDATA(shost)->SCint[i]->device->soft_reset)) {
#if 0
			HOSTDATA(shost)->mb[i].status = 1;	/* Indicate ready to restart... */
#endif
			count++;
		}
	printk(KERN_DEBUG "Potential to restart %d stalled commands...\n", count);
#if 0
	/* start scsi command */
	if (count)
		aha1542_out(shost->io_port, &ahacmd, 1);
#endif
	return 0;
}

/*
 * This is a device reset.  This is handled by sending a special command
 * to the device.
 */
static int aha1542_dev_reset(Scsi_Cmnd * SCpnt)
{
	unsigned long flags;
	struct mailbox *mb;
	unchar target = SCpnt->device->id;
	unchar lun = SCpnt->device->lun;
	int mbo;
	struct ccb *ccb;
	unchar ahacmd = CMD_START_SCSI;

	ccb = HOSTDATA(SCpnt->device->host)->ccb;
	mb = HOSTDATA(SCpnt->device->host)->mb;

	spin_lock_irqsave(&aha1542_lock, flags);
	mbo = HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used + 1;
	if (mbo >= AHA1542_MAILBOXES)
		mbo = 0;

	do {
		if (mb[mbo].status == 0 && HOSTDATA(SCpnt->device->host)->SCint[mbo] == NULL)
			break;
		mbo++;
		if (mbo >= AHA1542_MAILBOXES)
			mbo = 0;
	} while (mbo != HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used);

	if (mb[mbo].status || HOSTDATA(SCpnt->device->host)->SCint[mbo])
		panic("Unable to find empty mailbox for aha1542.\n");

	HOSTDATA(SCpnt->device->host)->SCint[mbo] = SCpnt;	/* This will effectively
							   prevent someone else from
							   screwing with this cdb. */

	HOSTDATA(SCpnt->device->host)->aha1542_last_mbo_used = mbo;
	spin_unlock_irqrestore(&aha1542_lock, flags);

	any2scsi(mb[mbo].ccbptr, SCSI_BUF_PA(&ccb[mbo]));	/* This gets trashed for some reason */

	memset(&ccb[mbo], 0, sizeof(struct ccb));

	ccb[mbo].op = 0x81;	/* BUS DEVICE RESET */

	ccb[mbo].idlun = (target & 7) << 5 | (lun & 7);		/*SCSI Target Id */

	ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
	ccb[mbo].commlinkid = 0;

	/* 
	 * Now tell the 1542 to flush all pending commands for this 
	 * target 
	 */
	aha1542_out(SCpnt->device->host->io_port, &ahacmd, 1);

1279 1280
	scmd_printk(KERN_WARNING, SCpnt,
		"Trying device reset for target\n");
Linus Torvalds's avatar
Linus Torvalds committed
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305

	return SUCCESS;


#ifdef ERIC_neverdef
	/* 
	 * With the 1542 we apparently never get an interrupt to
	 * acknowledge a device reset being sent.  Then again, Leonard
	 * says we are doing this wrong in the first place...
	 *
	 * Take a wait and see attitude.  If we get spurious interrupts,
	 * then the device reset is doing something sane and useful, and
	 * we will wait for the interrupt to post completion.
	 */
	printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target);

	/*
	 * Free the command block for all commands running on this 
	 * target... 
	 */
	for (i = 0; i < AHA1542_MAILBOXES; i++) {
		if (HOSTDATA(SCpnt->host)->SCint[i] &&
		    HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
			Scsi_Cmnd *SCtmp;
			SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
1306 1307
			kfree(SCtmp->host_scribble);
			SCtmp->host_scribble = NULL;
Linus Torvalds's avatar
Linus Torvalds committed
1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337
			HOSTDATA(SCpnt->host)->SCint[i] = NULL;
			HOSTDATA(SCpnt->host)->mb[i].status = 0;
		}
	}
	return SUCCESS;

	return FAILED;
#endif				/* ERIC_neverdef */
}

static int aha1542_bus_reset(Scsi_Cmnd * SCpnt)
{
	int i;

	/* 
	 * This does a scsi reset for all devices on the bus.
	 * In principle, we could also reset the 1542 - should
	 * we do this?  Try this first, and we can add that later
	 * if it turns out to be useful.
	 */
	outb(SCRST, CONTROL(SCpnt->device->host->io_port));

	/*
	 * Wait for the thing to settle down a bit.  Unfortunately
	 * this is going to basically lock up the machine while we
	 * wait for this to complete.  To be 100% correct, we need to
	 * check for timeout, and if we are doing something like this
	 * we are pretty desperate anyways.
	 */
	ssleep(4);
1338

Linus Torvalds's avatar
Linus Torvalds committed
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366
	spin_lock_irq(SCpnt->device->host->host_lock);

	WAIT(STATUS(SCpnt->device->host->io_port),
	     STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);

	/*
	 * Now try to pick up the pieces.  For all pending commands,
	 * free any internal data structures, and basically clear things
	 * out.  We do not try and restart any commands or anything - 
	 * the strategy handler takes care of that crap.
	 */
	printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no);

	for (i = 0; i < AHA1542_MAILBOXES; i++) {
		if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) {
			Scsi_Cmnd *SCtmp;
			SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i];


			if (SCtmp->device->soft_reset) {
				/*
				 * If this device implements the soft reset option,
				 * then it is still holding onto the command, and
				 * may yet complete it.  In this case, we don't
				 * flush the data.
				 */
				continue;
			}
1367 1368
			kfree(SCtmp->host_scribble);
			SCtmp->host_scribble = NULL;
Linus Torvalds's avatar
Linus Torvalds committed
1369 1370 1371 1372 1373
			HOSTDATA(SCpnt->device->host)->SCint[i] = NULL;
			HOSTDATA(SCpnt->device->host)->mb[i].status = 0;
		}
	}

1374
	spin_unlock_irq(SCpnt->device->host->host_lock);
Linus Torvalds's avatar
Linus Torvalds committed
1375 1376 1377
	return SUCCESS;

fail:
1378
	spin_unlock_irq(SCpnt->device->host->host_lock);
Linus Torvalds's avatar
Linus Torvalds committed
1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434
	return FAILED;
}

static int aha1542_host_reset(Scsi_Cmnd * SCpnt)
{
	int i;

	/* 
	 * This does a scsi reset for all devices on the bus.
	 * In principle, we could also reset the 1542 - should
	 * we do this?  Try this first, and we can add that later
	 * if it turns out to be useful.
	 */
	outb(HRST | SCRST, CONTROL(SCpnt->device->host->io_port));

	/*
	 * Wait for the thing to settle down a bit.  Unfortunately
	 * this is going to basically lock up the machine while we
	 * wait for this to complete.  To be 100% correct, we need to
	 * check for timeout, and if we are doing something like this
	 * we are pretty desperate anyways.
	 */
	ssleep(4);
	spin_lock_irq(SCpnt->device->host->host_lock);

	WAIT(STATUS(SCpnt->device->host->io_port),
	     STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);

	/*
	 * We need to do this too before the 1542 can interact with
	 * us again.
	 */
	setup_mailboxes(SCpnt->device->host->io_port, SCpnt->device->host);

	/*
	 * Now try to pick up the pieces.  For all pending commands,
	 * free any internal data structures, and basically clear things
	 * out.  We do not try and restart any commands or anything - 
	 * the strategy handler takes care of that crap.
	 */
	printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->device->host->host_no);

	for (i = 0; i < AHA1542_MAILBOXES; i++) {
		if (HOSTDATA(SCpnt->device->host)->SCint[i] != NULL) {
			Scsi_Cmnd *SCtmp;
			SCtmp = HOSTDATA(SCpnt->device->host)->SCint[i];

			if (SCtmp->device->soft_reset) {
				/*
				 * If this device implements the soft reset option,
				 * then it is still holding onto the command, and
				 * may yet complete it.  In this case, we don't
				 * flush the data.
				 */
				continue;
			}
1435 1436
			kfree(SCtmp->host_scribble);
			SCtmp->host_scribble = NULL;
Linus Torvalds's avatar
Linus Torvalds committed
1437 1438 1439 1440 1441
			HOSTDATA(SCpnt->device->host)->SCint[i] = NULL;
			HOSTDATA(SCpnt->device->host)->mb[i].status = 0;
		}
	}

1442
	spin_unlock_irq(SCpnt->device->host->host_lock);
Linus Torvalds's avatar
Linus Torvalds committed
1443 1444 1445
	return SUCCESS;

fail:
1446
	spin_unlock_irq(SCpnt->device->host->host_lock);
Linus Torvalds's avatar
Linus Torvalds committed
1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578
	return FAILED;
}

#if 0
/*
 * These are the old error handling routines.  They are only temporarily
 * here while we play with the new error handling code.
 */
static int aha1542_old_abort(Scsi_Cmnd * SCpnt)
{
#if 0
	unchar ahacmd = CMD_START_SCSI;
	unsigned long flags;
	struct mailbox *mb;
	int mbi, mbo, i;

	printk(KERN_DEBUG "In aha1542_abort: %x %x\n",
	       inb(STATUS(SCpnt->host->io_port)),
	       inb(INTRFLAGS(SCpnt->host->io_port)));

	spin_lock_irqsave(&aha1542_lock, flags);
	mb = HOSTDATA(SCpnt->host)->mb;
	mbi = HOSTDATA(SCpnt->host)->aha1542_last_mbi_used + 1;
	if (mbi >= 2 * AHA1542_MAILBOXES)
		mbi = AHA1542_MAILBOXES;

	do {
		if (mb[mbi].status != 0)
			break;
		mbi++;
		if (mbi >= 2 * AHA1542_MAILBOXES)
			mbi = AHA1542_MAILBOXES;
	} while (mbi != HOSTDATA(SCpnt->host)->aha1542_last_mbi_used);
	spin_unlock_irqrestore(&aha1542_lock, flags);

	if (mb[mbi].status) {
		printk(KERN_ERR "Lost interrupt discovered on irq %d - attempting to recover\n",
		       SCpnt->host->irq);
		aha1542_intr_handle(SCpnt->host, NULL);
		return 0;
	}
	/* OK, no lost interrupt.  Try looking to see how many pending commands
	   we think we have. */

	for (i = 0; i < AHA1542_MAILBOXES; i++)
		if (HOSTDATA(SCpnt->host)->SCint[i]) {
			if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
				printk(KERN_ERR "Timed out command pending for %s\n",
				       SCpnt->request->rq_disk ?
				       SCpnt->request->rq_disk->disk_name : "?"
				       );
				if (HOSTDATA(SCpnt->host)->mb[i].status) {
					printk(KERN_ERR "OGMB still full - restarting\n");
					aha1542_out(SCpnt->host->io_port, &ahacmd, 1);
				};
			} else
				printk(KERN_ERR "Other pending command %s\n",
				       SCpnt->request->rq_disk ?
				       SCpnt->request->rq_disk->disk_name : "?"
				       );
		}
#endif

	DEB(printk("aha1542_abort\n"));
#if 0
	spin_lock_irqsave(&aha1542_lock, flags);
	for (mbo = 0; mbo < AHA1542_MAILBOXES; mbo++) {
		if (SCpnt == HOSTDATA(SCpnt->host)->SCint[mbo]) {
			mb[mbo].status = 2;	/* Abort command */
			aha1542_out(SCpnt->host->io_port, &ahacmd, 1);	/* start scsi command */
			spin_unlock_irqrestore(&aha1542_lock, flags);
			break;
		}
	}
	if (AHA1542_MAILBOXES == mbo)
		spin_unlock_irqrestore(&aha1542_lock, flags);
#endif
	return SCSI_ABORT_SNOOZE;
}

/* We do not implement a reset function here, but the upper level code
   assumes that it will get some kind of response for the command in
   SCpnt.  We must oblige, or the command will hang the scsi system.
   For a first go, we assume that the 1542 notifies us with all of the
   pending commands (it does implement soft reset, after all). */

static int aha1542_old_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags)
{
	unchar ahacmd = CMD_START_SCSI;
	int i;

	/*
	 * See if a bus reset was suggested.
	 */
	if (reset_flags & SCSI_RESET_SUGGEST_BUS_RESET) {
		/* 
		 * This does a scsi reset for all devices on the bus.
		 * In principle, we could also reset the 1542 - should
		 * we do this?  Try this first, and we can add that later
		 * if it turns out to be useful.
		 */
		outb(HRST | SCRST, CONTROL(SCpnt->host->io_port));

		/*
		 * Wait for the thing to settle down a bit.  Unfortunately
		 * this is going to basically lock up the machine while we
		 * wait for this to complete.  To be 100% correct, we need to
		 * check for timeout, and if we are doing something like this
		 * we are pretty desperate anyways.
		 */
		WAIT(STATUS(SCpnt->host->io_port),
		STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF);

		/*
		 * We need to do this too before the 1542 can interact with
		 * us again.
		 */
		setup_mailboxes(SCpnt->host->io_port, SCpnt->host);

		/*
		 * Now try to pick up the pieces.  Restart all commands
		 * that are currently active on the bus, and reset all of
		 * the datastructures.  We have some time to kill while
		 * things settle down, so print a nice message.
		 */
		printk(KERN_WARNING "Sent BUS RESET to scsi host %d\n", SCpnt->host->host_no);

		for (i = 0; i < AHA1542_MAILBOXES; i++)
			if (HOSTDATA(SCpnt->host)->SCint[i] != NULL) {
				Scsi_Cmnd *SCtmp;
				SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
				SCtmp->result = DID_RESET << 16;
1579 1580
				kfree(SCtmp->host_scribble);
				SCtmp->host_scribble = NULL;
Linus Torvalds's avatar
Linus Torvalds committed
1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622
				printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target);
				SCtmp->scsi_done(SCpnt);

				HOSTDATA(SCpnt->host)->SCint[i] = NULL;
				HOSTDATA(SCpnt->host)->mb[i].status = 0;
			}
		/*
		 * Now tell the mid-level code what we did here.  Since
		 * we have restarted all of the outstanding commands,
		 * then report SUCCESS.
		 */
		return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET);
fail:
		printk(KERN_CRIT "aha1542.c: Unable to perform hard reset.\n");
		printk(KERN_CRIT "Power cycle machine to reset\n");
		return (SCSI_RESET_ERROR | SCSI_RESET_BUS_RESET);


	} else {
		/* This does a selective reset of just the one device */
		/* First locate the ccb for this command */
		for (i = 0; i < AHA1542_MAILBOXES; i++)
			if (HOSTDATA(SCpnt->host)->SCint[i] == SCpnt) {
				HOSTDATA(SCpnt->host)->ccb[i].op = 0x81;	/* BUS DEVICE RESET */
				/* Now tell the 1542 to flush all pending commands for this target */
				aha1542_out(SCpnt->host->io_port, &ahacmd, 1);

				/* Here is the tricky part.  What to do next.  Do we get an interrupt
				   for the commands that we aborted with the specified target, or
				   do we generate this on our own?  Try it without first and see
				   what happens */
				printk(KERN_WARNING "Sent BUS DEVICE RESET to target %d\n", SCpnt->target);

				/* If the first does not work, then try the second.  I think the
				   first option is more likely to be correct. Free the command
				   block for all commands running on this target... */
				for (i = 0; i < AHA1542_MAILBOXES; i++)
					if (HOSTDATA(SCpnt->host)->SCint[i] &&
					    HOSTDATA(SCpnt->host)->SCint[i]->target == SCpnt->target) {
						Scsi_Cmnd *SCtmp;
						SCtmp = HOSTDATA(SCpnt->host)->SCint[i];
						SCtmp->result = DID_RESET << 16;
1623 1624
						kfree(SCtmp->host_scribble);
						SCtmp->host_scribble = NULL;
Linus Torvalds's avatar
Linus Torvalds committed
1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664
						printk(KERN_WARNING "Sending DID_RESET for target %d\n", SCpnt->target);
						SCtmp->scsi_done(SCpnt);

						HOSTDATA(SCpnt->host)->SCint[i] = NULL;
						HOSTDATA(SCpnt->host)->mb[i].status = 0;
					}
				return SCSI_RESET_SUCCESS;
			}
	}
	/* No active command at this time, so this means that each time we got
	   some kind of response the last time through.  Tell the mid-level code
	   to request sense information in order to decide what to do next. */
	return SCSI_RESET_PUNT;
}
#endif    /* end of big comment block around old_abort + old_reset */

static int aha1542_biosparam(struct scsi_device *sdev,
		struct block_device *bdev, sector_t capacity, int *ip)
{
	int translation_algorithm;
	int size = capacity;

	translation_algorithm = HOSTDATA(sdev->host)->bios_translation;

	if ((size >> 11) > 1024 && translation_algorithm == BIOS_TRANSLATION_25563) {
		/* Please verify that this is the same as what DOS returns */
		ip[0] = 255;
		ip[1] = 63;
		ip[2] = size / 255 / 63;
	} else {
		ip[0] = 64;
		ip[1] = 32;
		ip[2] = size >> 11;
	}

	return 0;
}
MODULE_LICENSE("GPL");


1665
static struct scsi_host_template driver_template = {
Linus Torvalds's avatar
Linus Torvalds committed
1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682
	.proc_name		= "aha1542",
	.name			= "Adaptec 1542",
	.detect			= aha1542_detect,
	.release		= aha1542_release,
	.queuecommand		= aha1542_queuecommand,
	.eh_device_reset_handler= aha1542_dev_reset,
	.eh_bus_reset_handler	= aha1542_bus_reset,
	.eh_host_reset_handler	= aha1542_host_reset,
	.bios_param		= aha1542_biosparam,
	.can_queue		= AHA1542_MAILBOXES, 
	.this_id		= 7,
	.sg_tablesize		= AHA1542_SCATTER,
	.cmd_per_lun		= AHA1542_CMDLUN,
	.unchecked_isa_dma	= 1, 
	.use_clustering		= ENABLE_CLUSTERING,
};
#include "scsi_module.c"