ioc3.c 20 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843
/*
 * SGI IOC3 master driver and IRQ demuxer
 *
 * Copyright (c) 2005 Stanislaw Skowronek <skylark@linux-mips.org>
 * Heavily based on similar work by:
 *   Brent Casavant <bcasavan@sgi.com> - IOC4 master driver
 *   Pat Gefre <pfg@sgi.com> - IOC3 serial port IRQ demuxer
 */

#include <linux/errno.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/ioc3.h>
#include <linux/rwsem.h>
#include <linux/slab.h>

#define IOC3_PCI_SIZE 0x100000

static LIST_HEAD(ioc3_devices);
static int ioc3_counter;
static DECLARE_RWSEM(ioc3_devices_rwsem);

static struct ioc3_submodule *ioc3_submodules[IOC3_MAX_SUBMODULES];
static struct ioc3_submodule *ioc3_ethernet;
static DEFINE_RWLOCK(ioc3_submodules_lock);

/* NIC probing code */

#define GPCR_MLAN_EN    0x00200000      /* enable MCR to pin 8 */

static inline unsigned mcr_pack(unsigned pulse, unsigned sample)
{
	return (pulse << 10) | (sample << 2);
}

static int nic_wait(struct ioc3_driver_data *idd)
{
	unsigned mcr;

        do {
                mcr = readl(&idd->vma->mcr);
        } while (!(mcr & 2));

        return mcr & 1;
}

static int nic_reset(struct ioc3_driver_data *idd)
{
        int presence;
	unsigned long flags;

	local_irq_save(flags);
	writel(mcr_pack(500, 65), &idd->vma->mcr);
	presence = nic_wait(idd);
	local_irq_restore(flags);

	udelay(500);

        return presence;
}

static int nic_read_bit(struct ioc3_driver_data *idd)
{
	int result;
	unsigned long flags;

	local_irq_save(flags);
	writel(mcr_pack(6, 13), &idd->vma->mcr);
	result = nic_wait(idd);
	local_irq_restore(flags);

	udelay(500);

	return result;
}

static void nic_write_bit(struct ioc3_driver_data *idd, int bit)
{
	if (bit)
		writel(mcr_pack(6, 110), &idd->vma->mcr);
	else
		writel(mcr_pack(80, 30), &idd->vma->mcr);

	nic_wait(idd);
}

static unsigned nic_read_byte(struct ioc3_driver_data *idd)
{
	unsigned result = 0;
	int i;

	for (i = 0; i < 8; i++)
		result = (result >> 1) | (nic_read_bit(idd) << 7);

	return result;
}

static void nic_write_byte(struct ioc3_driver_data *idd, int byte)
{
	int i, bit;

	for (i = 8; i; i--) {
		bit = byte & 1;
		byte >>= 1;

		nic_write_bit(idd, bit);
	}
}

static unsigned long
nic_find(struct ioc3_driver_data *idd, int *last, unsigned long addr)
{
	int a, b, index, disc;

	nic_reset(idd);

	/* Search ROM.  */
	nic_write_byte(idd, 0xF0);

	/* Algorithm from ``Book of iButton Standards''.  */
	for (index = 0, disc = 0; index < 64; index++) {
		a = nic_read_bit(idd);
		b = nic_read_bit(idd);

		if (a && b) {
			printk(KERN_WARNING "IOC3 NIC search failed.\n");
			*last = 0;
			return 0;
		}

		if (!a && !b) {
			if (index == *last) {
				addr |= 1UL << index;
			} else if (index > *last) {
				addr &= ~(1UL << index);
				disc = index;
			} else if ((addr & (1UL << index)) == 0)
				disc = index;
			nic_write_bit(idd, (addr>>index)&1);
			continue;
		} else {
			if (a)
				addr |= 1UL << index;
			else
				addr &= ~(1UL << index);
			nic_write_bit(idd, a);
			continue;
		}
	}
	*last = disc;
	return addr;
}

static void nic_addr(struct ioc3_driver_data *idd, unsigned long addr)
{
	int index;

	nic_reset(idd);
	nic_write_byte(idd, 0xF0);
	for (index = 0; index < 64; index++) {
		nic_read_bit(idd);
		nic_read_bit(idd);
		nic_write_bit(idd, (addr>>index)&1);
	}
}

static void crc16_byte(unsigned int *crc, unsigned char db)
{
	int i;

	for(i=0;i<8;i++) {
		*crc <<= 1;
		if((db^(*crc>>16)) & 1)
			*crc ^= 0x8005;
		db >>= 1;
	}
	*crc &= 0xFFFF;
}

static unsigned int crc16_area(unsigned char *dbs, int size, unsigned int crc)
{
	while(size--)
		crc16_byte(&crc, *(dbs++));
	return crc;
}

static void crc8_byte(unsigned int *crc, unsigned char db)
{
	int i,f;

	for(i=0;i<8;i++) {
		f = (*crc ^ db) & 1;
		*crc >>= 1;
		db >>= 1;
		if(f)
			*crc ^= 0x8c;
	}
	*crc &= 0xff;
}

static unsigned int crc8_addr(unsigned long addr)
{
	int i;
	unsigned int crc = 0x00;

	for(i=0;i<8;i++)
		crc8_byte(&crc, addr>>(i<<3));
	return crc;
}

static void
read_redir_page(struct ioc3_driver_data *idd, unsigned long addr, int page,
			unsigned char *redir, unsigned char *data)
{
	int loops = 16, i;

	while(redir[page] != 0xFF) {
		page = redir[page]^0xFF;
		loops--;
		if(loops<0) {
			printk(KERN_ERR "IOC3: NIC circular redirection\n");
			return;
		}
	}
	loops = 3;
	while(loops>0) {
		nic_addr(idd, addr);
		nic_write_byte(idd, 0xF0);
		nic_write_byte(idd, (page << 5) & 0xE0);
		nic_write_byte(idd, (page >> 3) & 0x1F);
		for(i=0;i<0x20;i++)
			data[i] = nic_read_byte(idd);
		if(crc16_area(data, 0x20, 0x0000) == 0x800d)
			return;
		loops--;
	}
	printk(KERN_ERR "IOC3: CRC error in data page\n");
	for(i=0;i<0x20;i++)
		data[i] = 0x00;
}

static void
read_redir_map(struct ioc3_driver_data *idd, unsigned long addr,
					 unsigned char *redir)
{
	int i,j,loops = 3,crc_ok;
	unsigned int crc;

	while(loops>0) {
		crc_ok = 1;
		nic_addr(idd, addr);
		nic_write_byte(idd, 0xAA);
		nic_write_byte(idd, 0x00);
		nic_write_byte(idd, 0x01);
		for(i=0;i<64;i+=8) {
			for(j=0;j<8;j++)
				redir[i+j] = nic_read_byte(idd);
			crc = crc16_area(redir+i, 8, (i==0)?0x8707:0x0000);
			crc16_byte(&crc, nic_read_byte(idd));
			crc16_byte(&crc, nic_read_byte(idd));
			if(crc != 0x800d)
				crc_ok = 0;
		}
		if(crc_ok)
			return;
		loops--;
	}
	printk(KERN_ERR "IOC3: CRC error in redirection page\n");
	for(i=0;i<64;i++)
		redir[i] = 0xFF;
}

static void read_nic(struct ioc3_driver_data *idd, unsigned long addr)
{
	unsigned char redir[64];
	unsigned char data[64],part[32];
	int i,j;

	/* read redirections */
	read_redir_map(idd, addr, redir);
	/* read data pages */
	read_redir_page(idd, addr, 0, redir, data);
	read_redir_page(idd, addr, 1, redir, data+32);
	/* assemble the part # */
	j=0;
	for(i=0;i<19;i++)
		if(data[i+11] != ' ')
			part[j++] = data[i+11];
	for(i=0;i<6;i++)
		if(data[i+32] != ' ')
			part[j++] = data[i+32];
	part[j] = 0;
	/* skip Octane power supplies */
	if(!strncmp(part, "060-0035-", 9))
		return;
	if(!strncmp(part, "060-0038-", 9))
		return;
	strcpy(idd->nic_part, part);
	/* assemble the serial # */
	j=0;
	for(i=0;i<10;i++)
		if(data[i+1] != ' ')
			idd->nic_serial[j++] = data[i+1];
	idd->nic_serial[j] = 0;
}

static void read_mac(struct ioc3_driver_data *idd, unsigned long addr)
{
	int i, loops = 3;
	unsigned char data[13];

	while(loops>0) {
		nic_addr(idd, addr);
		nic_write_byte(idd, 0xF0);
		nic_write_byte(idd, 0x00);
		nic_write_byte(idd, 0x00);
		nic_read_byte(idd);
		for(i=0;i<13;i++)
			data[i] = nic_read_byte(idd);
		if(crc16_area(data, 13, 0x0000) == 0x800d) {
			for(i=10;i>4;i--)
				idd->nic_mac[10-i] = data[i];
			return;
		}
		loops--;
	}
	printk(KERN_ERR "IOC3: CRC error in MAC address\n");
	for(i=0;i<6;i++)
		idd->nic_mac[i] = 0x00;
}

static void probe_nic(struct ioc3_driver_data *idd)
{
        int save = 0, loops = 3;
        unsigned long first, addr;

        writel(GPCR_MLAN_EN, &idd->vma->gpcr_s);

        while(loops>0) {
                idd->nic_part[0] = 0;
                idd->nic_serial[0] = 0;
                addr = first = nic_find(idd, &save, 0);
                if(!first)
                        return;
                while(1) {
                        if(crc8_addr(addr))
                                break;
                        else {
                                switch(addr & 0xFF) {
                                case 0x0B:
                                        read_nic(idd, addr);
                                        break;
                                case 0x09:
                                case 0x89:
                                case 0x91:
                                        read_mac(idd, addr);
                                        break;
                                }
                        }
                        addr = nic_find(idd, &save, addr);
                        if(addr == first)
                                return;
                }
                loops--;
        }
        printk(KERN_ERR "IOC3: CRC error in NIC address\n");
}

/* Interrupts */

static void write_ireg(struct ioc3_driver_data *idd, uint32_t val, int which)
{
	unsigned long flags;

	spin_lock_irqsave(&idd->ir_lock, flags);
	switch (which) {
	case IOC3_W_IES:
		writel(val, &idd->vma->sio_ies);
		break;
	case IOC3_W_IEC:
		writel(val, &idd->vma->sio_iec);
		break;
	}
	spin_unlock_irqrestore(&idd->ir_lock, flags);
}
static inline uint32_t get_pending_intrs(struct ioc3_driver_data *idd)
{
	unsigned long flag;
	uint32_t intrs = 0;

	spin_lock_irqsave(&idd->ir_lock, flag);
	intrs = readl(&idd->vma->sio_ir);
	intrs &= readl(&idd->vma->sio_ies);
	spin_unlock_irqrestore(&idd->ir_lock, flag);
	return intrs;
}

static irqreturn_t ioc3_intr_io(int irq, void *arg)
{
	unsigned long flags;
	struct ioc3_driver_data *idd = arg;
	int handled = 1, id;
	unsigned int pending;

	read_lock_irqsave(&ioc3_submodules_lock, flags);

	if(idd->dual_irq && readb(&idd->vma->eisr)) {
		/* send Ethernet IRQ to the driver */
		if(ioc3_ethernet && idd->active[ioc3_ethernet->id] &&
						ioc3_ethernet->intr) {
			handled = handled && !ioc3_ethernet->intr(ioc3_ethernet,
							idd, 0);
		}
	}
	pending = get_pending_intrs(idd);	/* look at the IO IRQs */

	for(id=0;id<IOC3_MAX_SUBMODULES;id++) {
		if(idd->active[id] && ioc3_submodules[id]
				&& (pending & ioc3_submodules[id]->irq_mask)
				&& ioc3_submodules[id]->intr) {
			write_ireg(idd, ioc3_submodules[id]->irq_mask,
							IOC3_W_IEC);
			if(!ioc3_submodules[id]->intr(ioc3_submodules[id],
				   idd, pending & ioc3_submodules[id]->irq_mask))
				pending &= ~ioc3_submodules[id]->irq_mask;
			if (ioc3_submodules[id]->reset_mask)
				write_ireg(idd, ioc3_submodules[id]->irq_mask,
							IOC3_W_IES);
		}
	}
	read_unlock_irqrestore(&ioc3_submodules_lock, flags);
	if(pending) {
		printk(KERN_WARNING
		  "IOC3: Pending IRQs 0x%08x discarded and disabled\n",pending);
		write_ireg(idd, pending, IOC3_W_IEC);
		handled = 1;
	}
	return handled?IRQ_HANDLED:IRQ_NONE;
}

static irqreturn_t ioc3_intr_eth(int irq, void *arg)
{
	unsigned long flags;
	struct ioc3_driver_data *idd = (struct ioc3_driver_data *)arg;
	int handled = 1;

	if(!idd->dual_irq)
		return IRQ_NONE;
	read_lock_irqsave(&ioc3_submodules_lock, flags);
	if(ioc3_ethernet && idd->active[ioc3_ethernet->id]
				&& ioc3_ethernet->intr)
		handled = handled && !ioc3_ethernet->intr(ioc3_ethernet, idd, 0);
	read_unlock_irqrestore(&ioc3_submodules_lock, flags);
	return handled?IRQ_HANDLED:IRQ_NONE;
}

void ioc3_enable(struct ioc3_submodule *is,
				struct ioc3_driver_data *idd, unsigned int irqs)
{
	write_ireg(idd, irqs & is->irq_mask, IOC3_W_IES);
}

void ioc3_ack(struct ioc3_submodule *is, struct ioc3_driver_data *idd,
				unsigned int irqs)
{
	writel(irqs & is->irq_mask, &idd->vma->sio_ir);
}

void ioc3_disable(struct ioc3_submodule *is,
				struct ioc3_driver_data *idd, unsigned int irqs)
{
	write_ireg(idd, irqs & is->irq_mask, IOC3_W_IEC);
}

void ioc3_gpcr_set(struct ioc3_driver_data *idd, unsigned int val)
{
	unsigned long flags;
	spin_lock_irqsave(&idd->gpio_lock, flags);
	writel(val, &idd->vma->gpcr_s);
	spin_unlock_irqrestore(&idd->gpio_lock, flags);
}

/* Keep it simple, stupid! */
static int find_slot(void **tab, int max)
{
	int i;
	for(i=0;i<max;i++)
		if(!(tab[i]))
			return i;
	return -1;
}

/* Register an IOC3 submodule */
int ioc3_register_submodule(struct ioc3_submodule *is)
{
	struct ioc3_driver_data *idd;
	int alloc_id;
	unsigned long flags;

	write_lock_irqsave(&ioc3_submodules_lock, flags);
	alloc_id = find_slot((void **)ioc3_submodules, IOC3_MAX_SUBMODULES);
	if(alloc_id != -1) {
		ioc3_submodules[alloc_id] = is;
		if(is->ethernet) {
			if(ioc3_ethernet==NULL)
				ioc3_ethernet=is;
			else
				printk(KERN_WARNING
				  "IOC3 Ethernet module already registered!\n");
		}
	}
	write_unlock_irqrestore(&ioc3_submodules_lock, flags);

	if(alloc_id == -1) {
		printk(KERN_WARNING "Increase IOC3_MAX_SUBMODULES!\n");
		return -ENOMEM;
	}

	is->id=alloc_id;

	/* Initialize submodule for each IOC3 */
	if (!is->probe)
		return 0;

	down_read(&ioc3_devices_rwsem);
	list_for_each_entry(idd, &ioc3_devices, list) {
		/* set to 1 for IRQs in probe */
		idd->active[alloc_id] = 1;
		idd->active[alloc_id] = !is->probe(is, idd);
	}
	up_read(&ioc3_devices_rwsem);

	return 0;
}

/* Unregister an IOC3 submodule */
void ioc3_unregister_submodule(struct ioc3_submodule *is)
{
	struct ioc3_driver_data *idd;
	unsigned long flags;

	write_lock_irqsave(&ioc3_submodules_lock, flags);
	if(ioc3_submodules[is->id]==is)
		ioc3_submodules[is->id]=NULL;
	else
		printk(KERN_WARNING
			"IOC3 submodule %s has wrong ID.\n",is->name);
	if(ioc3_ethernet==is)
		ioc3_ethernet = NULL;
	write_unlock_irqrestore(&ioc3_submodules_lock, flags);

	/* Remove submodule for each IOC3 */
	down_read(&ioc3_devices_rwsem);
	list_for_each_entry(idd, &ioc3_devices, list)
		if(idd->active[is->id]) {
			if(is->remove)
				if(is->remove(is, idd))
					printk(KERN_WARNING
					       "%s: IOC3 submodule %s remove failed "
					       "for pci_dev %s.\n",
					       __func__, module_name(is->owner),
					       pci_name(idd->pdev));
			idd->active[is->id] = 0;
			if(is->irq_mask)
				write_ireg(idd, is->irq_mask, IOC3_W_IEC);
		}
	up_read(&ioc3_devices_rwsem);
}

/*********************
 * Device management *
 *********************/

static char *ioc3_class_names[] = { "unknown", "IP27 BaseIO", "IP30 system",
			"MENET 1/2/3", "MENET 4", "CADduo", "Altix Serial" };

static int ioc3_class(struct ioc3_driver_data *idd)
{
	int res = IOC3_CLASS_NONE;
	/* NIC-based logic */
	if(!strncmp(idd->nic_part, "030-0891-", 9))
		res = IOC3_CLASS_BASE_IP30;
	if(!strncmp(idd->nic_part, "030-1155-", 9))
		res = IOC3_CLASS_CADDUO;
	if(!strncmp(idd->nic_part, "030-1657-", 9))
		res = IOC3_CLASS_SERIAL;
	if(!strncmp(idd->nic_part, "030-1664-", 9))
		res = IOC3_CLASS_SERIAL;
	/* total random heuristics */
#ifdef CONFIG_SGI_IP27
	if(!idd->nic_part[0])
		res = IOC3_CLASS_BASE_IP27;
#endif
	/* print educational message */
	printk(KERN_INFO "IOC3 part: [%s], serial: [%s] => class %s\n",
			idd->nic_part, idd->nic_serial, ioc3_class_names[res]);
	return res;
}
/* Adds a new instance of an IOC3 card */
static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
{
	struct ioc3_driver_data *idd;
	uint32_t pcmd;
	int ret, id;

	/* Enable IOC3 and take ownership of it */
	if ((ret = pci_enable_device(pdev))) {
		printk(KERN_WARNING
		       "%s: Failed to enable IOC3 device for pci_dev %s.\n",
		       __func__, pci_name(pdev));
		goto out;
	}
	pci_set_master(pdev);

#ifdef USE_64BIT_DMA
        ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
        if (!ret) {
                ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
                if (ret < 0) {
                        printk(KERN_WARNING "%s: Unable to obtain 64 bit DMA "
                               "for consistent allocations\n",
				__func__);
                }
	}
#endif

	/* Set up per-IOC3 data */
	idd = kzalloc(sizeof(struct ioc3_driver_data), GFP_KERNEL);
	if (!idd) {
		printk(KERN_WARNING
		       "%s: Failed to allocate IOC3 data for pci_dev %s.\n",
		       __func__, pci_name(pdev));
		ret = -ENODEV;
		goto out_idd;
	}
	spin_lock_init(&idd->ir_lock);
	spin_lock_init(&idd->gpio_lock);
	idd->pdev = pdev;

	/* Map all IOC3 registers.  These are shared between subdevices
	 * so the main IOC3 module manages them.
	 */
	idd->pma = pci_resource_start(pdev, 0);
	if (!idd->pma) {
		printk(KERN_WARNING
		       "%s: Unable to find IOC3 resource "
		       "for pci_dev %s.\n",
		       __func__, pci_name(pdev));
		ret = -ENODEV;
		goto out_pci;
	}
	if (!request_mem_region(idd->pma, IOC3_PCI_SIZE, "ioc3")) {
		printk(KERN_WARNING
		       "%s: Unable to request IOC3 region "
		       "for pci_dev %s.\n",
		       __func__, pci_name(pdev));
		ret = -ENODEV;
		goto out_pci;
	}
	idd->vma = ioremap(idd->pma, IOC3_PCI_SIZE);
	if (!idd->vma) {
		printk(KERN_WARNING
		       "%s: Unable to remap IOC3 region "
		       "for pci_dev %s.\n",
		       __func__, pci_name(pdev));
		ret = -ENODEV;
		goto out_misc_region;
	}

	/* Track PCI-device specific data */
	pci_set_drvdata(pdev, idd);
	down_write(&ioc3_devices_rwsem);
	list_add_tail(&idd->list, &ioc3_devices);
	idd->id = ioc3_counter++;
	up_write(&ioc3_devices_rwsem);

	idd->gpdr_shadow = readl(&idd->vma->gpdr);

	/* Read IOC3 NIC contents */
	probe_nic(idd);

	/* Detect IOC3 class */
	idd->class = ioc3_class(idd);

	/* Initialize IOC3 */
       pci_read_config_dword(pdev, PCI_COMMAND, &pcmd);
       pci_write_config_dword(pdev, PCI_COMMAND,
                               pcmd | PCI_COMMAND_MEMORY |
                               PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
                               PCI_SCR_DROP_MODE_EN);

	write_ireg(idd, ~0, IOC3_W_IEC);
	writel(~0, &idd->vma->sio_ir);

	/* Set up IRQs */
	if(idd->class == IOC3_CLASS_BASE_IP30
				|| idd->class == IOC3_CLASS_BASE_IP27) {
		writel(0, &idd->vma->eier);
		writel(~0, &idd->vma->eisr);

		idd->dual_irq = 1;
		if (!request_irq(pdev->irq, ioc3_intr_eth, IRQF_SHARED,
				 "ioc3-eth", (void *)idd)) {
			idd->irq_eth = pdev->irq;
		} else {
			printk(KERN_WARNING
			       "%s : request_irq fails for IRQ 0x%x\n ",
			       __func__, pdev->irq);
		}
		if (!request_irq(pdev->irq+2, ioc3_intr_io, IRQF_SHARED,
				 "ioc3-io", (void *)idd)) {
			idd->irq_io = pdev->irq+2;
		} else {
			printk(KERN_WARNING
			       "%s : request_irq fails for IRQ 0x%x\n ",
			       __func__, pdev->irq+2);
		}
	} else {
		if (!request_irq(pdev->irq, ioc3_intr_io, IRQF_SHARED,
				 "ioc3", (void *)idd)) {
			idd->irq_io = pdev->irq;
		} else {
			printk(KERN_WARNING
			       "%s : request_irq fails for IRQ 0x%x\n ",
			       __func__, pdev->irq);
		}
	}

	/* Add this IOC3 to all submodules */
	for(id=0;id<IOC3_MAX_SUBMODULES;id++)
		if(ioc3_submodules[id] && ioc3_submodules[id]->probe) {
			idd->active[id] = 1;
			idd->active[id] = !ioc3_submodules[id]->probe
						(ioc3_submodules[id], idd);
		}

	printk(KERN_INFO "IOC3 Master Driver loaded for %s\n", pci_name(pdev));

	return 0;

out_misc_region:
	release_mem_region(idd->pma, IOC3_PCI_SIZE);
out_pci:
	kfree(idd);
out_idd:
	pci_disable_device(pdev);
out:
	return ret;
}

/* Removes a particular instance of an IOC3 card. */
static void ioc3_remove(struct pci_dev *pdev)
{
	int id;
	struct ioc3_driver_data *idd;

	idd = pci_get_drvdata(pdev);

	/* Remove this IOC3 from all submodules */
	for(id=0;id<IOC3_MAX_SUBMODULES;id++)
		if(idd->active[id]) {
			if(ioc3_submodules[id] && ioc3_submodules[id]->remove)
				if(ioc3_submodules[id]->remove(ioc3_submodules[id],
								idd))
					printk(KERN_WARNING
					       "%s: IOC3 submodule 0x%s remove failed "
					       "for pci_dev %s.\n",
						__func__,
						module_name(ioc3_submodules[id]->owner),
					        pci_name(pdev));
			idd->active[id] = 0;
		}

	/* Clear and disable all IRQs */
	write_ireg(idd, ~0, IOC3_W_IEC);
	writel(~0, &idd->vma->sio_ir);

	/* Release resources */
	free_irq(idd->irq_io, (void *)idd);
	if(idd->dual_irq)
		free_irq(idd->irq_eth, (void *)idd);
	iounmap(idd->vma);
	release_mem_region(idd->pma, IOC3_PCI_SIZE);

	/* Disable IOC3 and relinquish */
	pci_disable_device(pdev);

	/* Remove and free driver data */
	down_write(&ioc3_devices_rwsem);
	list_del(&idd->list);
	up_write(&ioc3_devices_rwsem);
	kfree(idd);
}

static struct pci_device_id ioc3_id_table[] = {
	{PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID},
	{0}
};

static struct pci_driver ioc3_driver = {
	.name = "IOC3",
	.id_table = ioc3_id_table,
	.probe = ioc3_probe,
	.remove = ioc3_remove,
};

MODULE_DEVICE_TABLE(pci, ioc3_id_table);

/*********************
 * Module management *
 *********************/

/* Module load */
static int __init ioc3_init(void)
{
	if (ia64_platform_is("sn2"))
		return pci_register_driver(&ioc3_driver);
	return -ENODEV;
}

/* Module unload */
static void __exit ioc3_exit(void)
{
	pci_unregister_driver(&ioc3_driver);
}

module_init(ioc3_init);
module_exit(ioc3_exit);

MODULE_AUTHOR("Stanislaw Skowronek <skylark@linux-mips.org>");
MODULE_DESCRIPTION("PCI driver for SGI IOC3");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL_GPL(ioc3_register_submodule);
EXPORT_SYMBOL_GPL(ioc3_unregister_submodule);
EXPORT_SYMBOL_GPL(ioc3_ack);
EXPORT_SYMBOL_GPL(ioc3_gpcr_set);
EXPORT_SYMBOL_GPL(ioc3_disable);
EXPORT_SYMBOL_GPL(ioc3_enable);