pcmcia_resource.c 25.5 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000
/*
 * PCMCIA 16-bit resource management functions
 *
 * The initial developer of the original code is David A. Hinds
 * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 *
 * Copyright (C) 1999	     David A. Hinds
 * Copyright (C) 2004-2010   Dominik Brodowski
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/slab.h>

#include <asm/irq.h>

#include <pcmcia/ss.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>

#include "cs_internal.h"


/* Access speed for IO windows */
static int io_speed;
module_param(io_speed, int, 0444);


int pcmcia_validate_mem(struct pcmcia_socket *s)
{
	if (s->resource_ops->validate_mem)
		return s->resource_ops->validate_mem(s);
	/* if there is no callback, we can assume that everything is OK */
	return 0;
}

struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
				 int low, struct pcmcia_socket *s)
{
	if (s->resource_ops->find_mem)
		return s->resource_ops->find_mem(base, num, align, low, s);
	return NULL;
}


/**
 * release_io_space() - release IO ports allocated with alloc_io_space()
 * @s: pcmcia socket
 * @res: resource to release
 *
 */
static void release_io_space(struct pcmcia_socket *s, struct resource *res)
{
	resource_size_t num = resource_size(res);
	int i;

	dev_dbg(&s->dev, "release_io_space for %pR\n", res);

	for (i = 0; i < MAX_IO_WIN; i++) {
		if (!s->io[i].res)
			continue;
		if ((s->io[i].res->start <= res->start) &&
		    (s->io[i].res->end >= res->end)) {
			s->io[i].InUse -= num;
			if (res->parent)
				release_resource(res);
			res->start = res->end = 0;
			res->flags = IORESOURCE_IO;
			/* Free the window if no one else is using it */
			if (s->io[i].InUse == 0) {
				release_resource(s->io[i].res);
				kfree(s->io[i].res);
				s->io[i].res = NULL;
			}
		}
	}
}


/**
 * alloc_io_space() - allocate IO ports for use by a PCMCIA device
 * @s: pcmcia socket
 * @res: resource to allocate (begin: begin, end: size)
 * @lines: number of IO lines decoded by the PCMCIA card
 *
 * Special stuff for managing IO windows, because they are scarce
 */
static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
			unsigned int lines)
{
	unsigned int align;
	unsigned int base = res->start;
	unsigned int num = res->end;
	int ret;

	res->flags |= IORESOURCE_IO;

	dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n",
		res, lines);

	align = base ? (lines ? 1<<lines : 0) : 1;
	if (align && (align < num)) {
		if (base) {
			dev_dbg(&s->dev, "odd IO request\n");
			align = 0;
		} else
			while (align && (align < num))
				align <<= 1;
	}
	if (base & ~(align-1)) {
		dev_dbg(&s->dev, "odd IO request\n");
		align = 0;
	}

	ret = s->resource_ops->find_io(s, res->flags, &base, num, align,
				&res->parent);
	if (ret) {
		dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret);
		return -EINVAL;
	}

	res->start = base;
	res->end = res->start + num - 1;

	if (res->parent) {
		ret = request_resource(res->parent, res);
		if (ret) {
			dev_warn(&s->dev,
				"request_resource %pR failed: %d\n", res, ret);
			res->parent = NULL;
			release_io_space(s, res);
		}
	}
	dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res);
	return ret;
}


/**
 * pcmcia_access_config() - read or write card configuration registers
 *
 * pcmcia_access_config() reads and writes configuration registers in
 * attribute memory.  Memory window 0 is reserved for this and the tuple
 * reading services. Drivers must use pcmcia_read_config_byte() or
 * pcmcia_write_config_byte().
 */
static int pcmcia_access_config(struct pcmcia_device *p_dev,
				off_t where, u8 *val,
				int (*accessf) (struct pcmcia_socket *s,
						int attr, unsigned int addr,
						unsigned int len, void *ptr))
{
	struct pcmcia_socket *s;
	config_t *c;
	int addr;
	int ret = 0;

	s = p_dev->socket;

	mutex_lock(&s->ops_mutex);
	c = p_dev->function_config;

	if (!(c->state & CONFIG_LOCKED)) {
		dev_dbg(&p_dev->dev, "Configuration isn't locked\n");
		mutex_unlock(&s->ops_mutex);
		return -EACCES;
	}

	addr = (p_dev->config_base + where) >> 1;

	ret = accessf(s, 1, addr, 1, val);

	mutex_unlock(&s->ops_mutex);

	return ret;
}


/**
 * pcmcia_read_config_byte() - read a byte from a card configuration register
 *
 * pcmcia_read_config_byte() reads a byte from a configuration register in
 * attribute memory.
 */
int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val)
{
	return pcmcia_access_config(p_dev, where, val, pcmcia_read_cis_mem);
}
EXPORT_SYMBOL(pcmcia_read_config_byte);


/**
 * pcmcia_write_config_byte() - write a byte to a card configuration register
 *
 * pcmcia_write_config_byte() writes a byte to a configuration register in
 * attribute memory.
 */
int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val)
{
	return pcmcia_access_config(p_dev, where, &val, pcmcia_write_cis_mem);
}
EXPORT_SYMBOL(pcmcia_write_config_byte);


/**
 * pcmcia_map_mem_page() - modify iomem window to point to a different offset
 * @p_dev: pcmcia device
 * @res: iomem resource already enabled by pcmcia_request_window()
 * @offset: card_offset to map
 *
 * pcmcia_map_mem_page() modifies what can be read and written by accessing
 * an iomem range previously enabled by pcmcia_request_window(), by setting
 * the card_offset value to @offset.
 */
int pcmcia_map_mem_page(struct pcmcia_device *p_dev, struct resource *res,
			unsigned int offset)
{
	struct pcmcia_socket *s = p_dev->socket;
	unsigned int w;
	int ret;

	w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
	if (w >= MAX_WIN)
		return -EINVAL;

	mutex_lock(&s->ops_mutex);
	s->win[w].card_start = offset;
	ret = s->ops->set_mem_map(s, &s->win[w]);
	if (ret)
		dev_warn(&p_dev->dev, "failed to set_mem_map\n");
	mutex_unlock(&s->ops_mutex);
	return ret;
}
EXPORT_SYMBOL(pcmcia_map_mem_page);


/**
 * pcmcia_fixup_iowidth() - reduce io width to 8bit
 * @p_dev: pcmcia device
 *
 * pcmcia_fixup_iowidth() allows a PCMCIA device driver to reduce the
 * IO width to 8bit after having called pcmcia_enable_device()
 * previously.
 */
int pcmcia_fixup_iowidth(struct pcmcia_device *p_dev)
{
	struct pcmcia_socket *s = p_dev->socket;
	pccard_io_map io_off = { 0, 0, 0, 0, 1 };
	pccard_io_map io_on;
	int i, ret = 0;

	mutex_lock(&s->ops_mutex);

	dev_dbg(&p_dev->dev, "fixup iowidth to 8bit\n");

	if (!(s->state & SOCKET_PRESENT) ||
		!(p_dev->function_config->state & CONFIG_LOCKED)) {
		dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
		ret = -EACCES;
		goto unlock;
	}

	io_on.speed = io_speed;
	for (i = 0; i < MAX_IO_WIN; i++) {
		if (!s->io[i].res)
			continue;
		io_off.map = i;
		io_on.map = i;

		io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
		io_on.start = s->io[i].res->start;
		io_on.stop = s->io[i].res->end;

		s->ops->set_io_map(s, &io_off);
		mdelay(40);
		s->ops->set_io_map(s, &io_on);
	}
unlock:
	mutex_unlock(&s->ops_mutex);

	return ret;
}
EXPORT_SYMBOL(pcmcia_fixup_iowidth);


/**
 * pcmcia_fixup_vpp() - set Vpp to a new voltage level
 * @p_dev: pcmcia device
 * @new_vpp: new Vpp voltage
 *
 * pcmcia_fixup_vpp() allows a PCMCIA device driver to set Vpp to
 * a new voltage level between calls to pcmcia_enable_device()
 * and pcmcia_disable_device().
 */
int pcmcia_fixup_vpp(struct pcmcia_device *p_dev, unsigned char new_vpp)
{
	struct pcmcia_socket *s = p_dev->socket;
	int ret = 0;

	mutex_lock(&s->ops_mutex);

	dev_dbg(&p_dev->dev, "fixup Vpp to %d\n", new_vpp);

	if (!(s->state & SOCKET_PRESENT) ||
		!(p_dev->function_config->state & CONFIG_LOCKED)) {
		dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
		ret = -EACCES;
		goto unlock;
	}

	s->socket.Vpp = new_vpp;
	if (s->ops->set_socket(s, &s->socket)) {
		dev_warn(&p_dev->dev, "Unable to set VPP\n");
		ret = -EIO;
		goto unlock;
	}
	p_dev->vpp = new_vpp;

unlock:
	mutex_unlock(&s->ops_mutex);

	return ret;
}
EXPORT_SYMBOL(pcmcia_fixup_vpp);


/**
 * pcmcia_release_configuration() - physically disable a PCMCIA device
 * @p_dev: pcmcia device
 *
 * pcmcia_release_configuration() is the 1:1 counterpart to
 * pcmcia_enable_device(): If a PCMCIA device is no longer used by any
 * driver, the Vpp voltage is set to 0, IRQs will no longer be generated,
 * and I/O ranges will be disabled. As pcmcia_release_io() and
 * pcmcia_release_window() still need to be called, device drivers are
 * expected to call pcmcia_disable_device() instead.
 */
int pcmcia_release_configuration(struct pcmcia_device *p_dev)
{
	pccard_io_map io = { 0, 0, 0, 0, 1 };
	struct pcmcia_socket *s = p_dev->socket;
	config_t *c;
	int i;

	mutex_lock(&s->ops_mutex);
	c = p_dev->function_config;
	if (p_dev->_locked) {
		p_dev->_locked = 0;
		if (--(s->lock_count) == 0) {
			s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
			s->socket.Vpp = 0;
			s->socket.io_irq = 0;
			s->ops->set_socket(s, &s->socket);
		}
	}
	if (c->state & CONFIG_LOCKED) {
		c->state &= ~CONFIG_LOCKED;
		if (c->state & CONFIG_IO_REQ)
			for (i = 0; i < MAX_IO_WIN; i++) {
				if (!s->io[i].res)
					continue;
				s->io[i].Config--;
				if (s->io[i].Config != 0)
					continue;
				io.map = i;
				s->ops->set_io_map(s, &io);
			}
	}
	mutex_unlock(&s->ops_mutex);

	return 0;
}


/**
 * pcmcia_release_io() - release I/O allocated by a PCMCIA device
 * @p_dev: pcmcia device
 *
 * pcmcia_release_io() releases the I/O ranges allocated by a PCMCIA
 * device.  This may be invoked some time after a card ejection has
 * already dumped the actual socket configuration, so if the client is
 * "stale", we don't bother checking the port ranges against the
 * current socket values.
 */
static int pcmcia_release_io(struct pcmcia_device *p_dev)
{
	struct pcmcia_socket *s = p_dev->socket;
	int ret = -EINVAL;
	config_t *c;

	mutex_lock(&s->ops_mutex);
	if (!p_dev->_io)
		goto out;

	c = p_dev->function_config;

	release_io_space(s, &c->io[0]);

	if (c->io[1].end)
		release_io_space(s, &c->io[1]);

	p_dev->_io = 0;
	c->state &= ~CONFIG_IO_REQ;

out:
	mutex_unlock(&s->ops_mutex);

	return ret;
} /* pcmcia_release_io */


/**
 * pcmcia_release_window() - release reserved iomem for PCMCIA devices
 * @p_dev: pcmcia device
 * @res: iomem resource to release
 *
 * pcmcia_release_window() releases &struct resource *res which was
 * previously reserved by calling pcmcia_request_window().
 */
int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res)
{
	struct pcmcia_socket *s = p_dev->socket;
	pccard_mem_map *win;
	unsigned int w;

	dev_dbg(&p_dev->dev, "releasing window %pR\n", res);

	w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
	if (w >= MAX_WIN)
		return -EINVAL;

	mutex_lock(&s->ops_mutex);
	win = &s->win[w];

	if (!(p_dev->_win & CLIENT_WIN_REQ(w))) {
		dev_dbg(&p_dev->dev, "not releasing unknown window\n");
		mutex_unlock(&s->ops_mutex);
		return -EINVAL;
	}

	/* Shut down memory window */
	win->flags &= ~MAP_ACTIVE;
	s->ops->set_mem_map(s, win);
	s->state &= ~SOCKET_WIN_REQ(w);

	/* Release system memory */
	if (win->res) {
		release_resource(res);
		release_resource(win->res);
		kfree(win->res);
		win->res = NULL;
	}
	res->start = res->end = 0;
	res->flags = IORESOURCE_MEM;
	p_dev->_win &= ~CLIENT_WIN_REQ(w);
	mutex_unlock(&s->ops_mutex);

	return 0;
} /* pcmcia_release_window */
EXPORT_SYMBOL(pcmcia_release_window);


/**
 * pcmcia_enable_device() - set up and activate a PCMCIA device
 * @p_dev: the associated PCMCIA device
 *
 * pcmcia_enable_device() physically enables a PCMCIA device. It parses
 * the flags passed to in @flags and stored in @p_dev->flags and sets up
 * the Vpp voltage, enables the speaker line, I/O ports and store proper
 * values to configuration registers.
 */
int pcmcia_enable_device(struct pcmcia_device *p_dev)
{
	int i;
	unsigned int base;
	struct pcmcia_socket *s = p_dev->socket;
	config_t *c;
	pccard_io_map iomap;
	unsigned char status = 0;
	unsigned char ext_status = 0;
	unsigned char option = 0;
	unsigned int flags = p_dev->config_flags;

	if (!(s->state & SOCKET_PRESENT))
		return -ENODEV;

	mutex_lock(&s->ops_mutex);
	c = p_dev->function_config;
	if (c->state & CONFIG_LOCKED) {
		mutex_unlock(&s->ops_mutex);
		dev_dbg(&p_dev->dev, "Configuration is locked\n");
		return -EACCES;
	}

	/* Do power control.  We don't allow changes in Vcc. */
	s->socket.Vpp = p_dev->vpp;
	if (s->ops->set_socket(s, &s->socket)) {
		mutex_unlock(&s->ops_mutex);
		dev_printk(KERN_WARNING, &p_dev->dev,
			   "Unable to set socket state\n");
		return -EINVAL;
	}

	/* Pick memory or I/O card, DMA mode, interrupt */
	if (p_dev->_io || flags & CONF_ENABLE_IRQ)
		flags |= CONF_ENABLE_IOCARD;
	if (flags & CONF_ENABLE_IOCARD)
		s->socket.flags |= SS_IOCARD;
	if (flags & CONF_ENABLE_ZVCARD)
		s->socket.flags |= SS_ZVCARD | SS_IOCARD;
	if (flags & CONF_ENABLE_SPKR) {
		s->socket.flags |= SS_SPKR_ENA;
		status = CCSR_AUDIO_ENA;
		if (!(p_dev->config_regs & PRESENT_STATUS))
			dev_warn(&p_dev->dev, "speaker requested, but "
					      "PRESENT_STATUS not set!\n");
	}
	if (flags & CONF_ENABLE_IRQ)
		s->socket.io_irq = s->pcmcia_irq;
	else
		s->socket.io_irq = 0;
	if (flags & CONF_ENABLE_ESR) {
		p_dev->config_regs |= PRESENT_EXT_STATUS;
		ext_status = ESR_REQ_ATTN_ENA;
	}
	s->ops->set_socket(s, &s->socket);
	s->lock_count++;

	dev_dbg(&p_dev->dev,
		"enable_device: V %d, flags %x, base %x, regs %x, idx %x\n",
		p_dev->vpp, flags, p_dev->config_base, p_dev->config_regs,
		p_dev->config_index);

	/* Set up CIS configuration registers */
	base = p_dev->config_base;
	if (p_dev->config_regs & PRESENT_COPY) {
		u16 tmp = 0;
		dev_dbg(&p_dev->dev, "clearing CISREG_SCR\n");
		pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &tmp);
	}
	if (p_dev->config_regs & PRESENT_PIN_REPLACE) {
		u16 tmp = 0;
		dev_dbg(&p_dev->dev, "clearing CISREG_PRR\n");
		pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &tmp);
	}
	if (p_dev->config_regs & PRESENT_OPTION) {
		if (s->functions == 1) {
			option = p_dev->config_index & COR_CONFIG_MASK;
		} else {
			option = p_dev->config_index & COR_MFC_CONFIG_MASK;
			option |= COR_FUNC_ENA|COR_IREQ_ENA;
			if (p_dev->config_regs & PRESENT_IOBASE_0)
				option |= COR_ADDR_DECODE;
		}
		if ((flags & CONF_ENABLE_IRQ) &&
			!(flags & CONF_ENABLE_PULSE_IRQ))
			option |= COR_LEVEL_REQ;
		pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &option);
		mdelay(40);
	}
	if (p_dev->config_regs & PRESENT_STATUS)
		pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &status);

	if (p_dev->config_regs & PRESENT_EXT_STATUS)
		pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1,
					&ext_status);

	if (p_dev->config_regs & PRESENT_IOBASE_0) {
		u8 b = c->io[0].start & 0xff;
		pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
		b = (c->io[0].start >> 8) & 0xff;
		pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
	}
	if (p_dev->config_regs & PRESENT_IOSIZE) {
		u8 b = resource_size(&c->io[0]) + resource_size(&c->io[1]) - 1;
		pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
	}

	/* Configure I/O windows */
	if (c->state & CONFIG_IO_REQ) {
		iomap.speed = io_speed;
		for (i = 0; i < MAX_IO_WIN; i++)
			if (s->io[i].res) {
				iomap.map = i;
				iomap.flags = MAP_ACTIVE;
				switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
				case IO_DATA_PATH_WIDTH_16:
					iomap.flags |= MAP_16BIT; break;
				case IO_DATA_PATH_WIDTH_AUTO:
					iomap.flags |= MAP_AUTOSZ; break;
				default:
					break;
				}
				iomap.start = s->io[i].res->start;
				iomap.stop = s->io[i].res->end;
				s->ops->set_io_map(s, &iomap);
				s->io[i].Config++;
			}
	}

	c->state |= CONFIG_LOCKED;
	p_dev->_locked = 1;
	mutex_unlock(&s->ops_mutex);
	return 0;
} /* pcmcia_enable_device */
EXPORT_SYMBOL(pcmcia_enable_device);


/**
 * pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices
 * @p_dev: the associated PCMCIA device
 *
 * pcmcia_request_io() attempts to reserve the IO port ranges specified in
 * &struct pcmcia_device @p_dev->resource[0] and @p_dev->resource[1]. The
 * "start" value is the requested start of the IO port resource; "end"
 * reflects the number of ports requested. The number of IO lines requested
 * is specified in &struct pcmcia_device @p_dev->io_lines.
 */
int pcmcia_request_io(struct pcmcia_device *p_dev)
{
	struct pcmcia_socket *s = p_dev->socket;
	config_t *c = p_dev->function_config;
	int ret = -EINVAL;

	mutex_lock(&s->ops_mutex);
	dev_dbg(&p_dev->dev, "pcmcia_request_io: %pR , %pR",
		&c->io[0], &c->io[1]);

	if (!(s->state & SOCKET_PRESENT)) {
		dev_dbg(&p_dev->dev, "pcmcia_request_io: No card present\n");
		goto out;
	}

	if (c->state & CONFIG_LOCKED) {
		dev_dbg(&p_dev->dev, "Configuration is locked\n");
		goto out;
	}
	if (c->state & CONFIG_IO_REQ) {
		dev_dbg(&p_dev->dev, "IO already configured\n");
		goto out;
	}

	ret = alloc_io_space(s, &c->io[0], p_dev->io_lines);
	if (ret)
		goto out;

	if (c->io[1].end) {
		ret = alloc_io_space(s, &c->io[1], p_dev->io_lines);
		if (ret) {
			struct resource tmp = c->io[0];
			/* release the previously allocated resource */
			release_io_space(s, &c->io[0]);
			/* but preserve the settings, for they worked... */
			c->io[0].end = resource_size(&tmp);
			c->io[0].start = tmp.start;
			c->io[0].flags = tmp.flags;
			goto out;
		}
	} else
		c->io[1].start = 0;

	c->state |= CONFIG_IO_REQ;
	p_dev->_io = 1;

	dev_dbg(&p_dev->dev, "pcmcia_request_io succeeded: %pR , %pR",
		&c->io[0], &c->io[1]);
out:
	mutex_unlock(&s->ops_mutex);

	return ret;
} /* pcmcia_request_io */
EXPORT_SYMBOL(pcmcia_request_io);


/**
 * pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device
 * @p_dev: the associated PCMCIA device
 * @handler: IRQ handler to register
 *
 * pcmcia_request_irq() is a wrapper around request_irq() which allows
 * the PCMCIA core to clean up the registration in pcmcia_disable_device().
 * Drivers are free to use request_irq() directly, but then they need to
 * call free_irq() themselfves, too. Also, only %IRQF_SHARED capable IRQ
 * handlers are allowed.
 */
int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev,
				    irq_handler_t handler)
{
	int ret;

	if (!p_dev->irq)
		return -EINVAL;

	ret = request_irq(p_dev->irq, handler, IRQF_SHARED,
			p_dev->devname, p_dev->priv);
	if (!ret)
		p_dev->_irq = 1;

	return ret;
}
EXPORT_SYMBOL(pcmcia_request_irq);


/**
 * pcmcia_request_exclusive_irq() - attempt to request an exclusive IRQ first
 * @p_dev: the associated PCMCIA device
 * @handler: IRQ handler to register
 *
 * pcmcia_request_exclusive_irq() is a wrapper around request_irq() which
 * attempts first to request an exclusive IRQ. If it fails, it also accepts
 * a shared IRQ, but prints out a warning. PCMCIA drivers should allow for
 * IRQ sharing and either use request_irq directly (then they need to call
 * free_irq() themselves, too), or the pcmcia_request_irq() function.
 */
int __must_check
__pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev,
			irq_handler_t handler)
{
	int ret;

	if (!p_dev->irq)
		return -EINVAL;

	ret = request_irq(p_dev->irq, handler, 0, p_dev->devname, p_dev->priv);
	if (ret) {
		ret = pcmcia_request_irq(p_dev, handler);
		dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
			"request for exclusive IRQ could not be fulfilled.\n");
		dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
			"needs updating to supported shared IRQ lines.\n");
	}
	if (ret)
		dev_printk(KERN_INFO, &p_dev->dev, "request_irq() failed\n");
	else
		p_dev->_irq = 1;

	return ret;
} /* pcmcia_request_exclusive_irq */
EXPORT_SYMBOL(__pcmcia_request_exclusive_irq);


#ifdef CONFIG_PCMCIA_PROBE

/* mask of IRQs already reserved by other cards, we should avoid using them */
static u8 pcmcia_used_irq[32];

static irqreturn_t test_action(int cpl, void *dev_id)
{
	return IRQ_NONE;
}

/**
 * pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used
 * @p_dev - the associated PCMCIA device
 *
 * locking note: must be called with ops_mutex locked.
 */
static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
{
	struct pcmcia_socket *s = p_dev->socket;
	unsigned int try, irq;
	u32 mask = s->irq_mask;
	int ret = -ENODEV;

	for (try = 0; try < 64; try++) {
		irq = try % 32;

		if (irq > NR_IRQS)
			continue;

		/* marked as available by driver, not blocked by userspace? */
		if (!((mask >> irq) & 1))
			continue;

		/* avoid an IRQ which is already used by another PCMCIA card */
		if ((try < 32) && pcmcia_used_irq[irq])
			continue;

		/* register the correct driver, if possible, to check whether
		 * registering a dummy handle works, i.e. if the IRQ isn't
		 * marked as used by the kernel resource management core */
		ret = request_irq(irq, test_action, type, p_dev->devname,
				  p_dev);
		if (!ret) {
			free_irq(irq, p_dev);
			p_dev->irq = s->pcmcia_irq = irq;
			pcmcia_used_irq[irq]++;
			break;
		}
	}

	return ret;
}

void pcmcia_cleanup_irq(struct pcmcia_socket *s)
{
	pcmcia_used_irq[s->pcmcia_irq]--;
	s->pcmcia_irq = 0;
}

#else /* CONFIG_PCMCIA_PROBE */

static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
{
	return -EINVAL;
}

void pcmcia_cleanup_irq(struct pcmcia_socket *s)
{
	s->pcmcia_irq = 0;
	return;
}

#endif  /* CONFIG_PCMCIA_PROBE */


/**
 * pcmcia_setup_irq() - determine IRQ to be used for device
 * @p_dev - the associated PCMCIA device
 *
 * locking note: must be called with ops_mutex locked.
 */
int pcmcia_setup_irq(struct pcmcia_device *p_dev)
{
	struct pcmcia_socket *s = p_dev->socket;

	if (p_dev->irq)
		return 0;

	/* already assigned? */
	if (s->pcmcia_irq) {
		p_dev->irq = s->pcmcia_irq;
		return 0;
	}

	/* prefer an exclusive ISA irq */
	if (!pcmcia_setup_isa_irq(p_dev, 0))
		return 0;

	/* but accept a shared ISA irq */
	if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED))
		return 0;

	/* but use the PCI irq otherwise */
	if (s->pci_irq) {
		p_dev->irq = s->pcmcia_irq = s->pci_irq;
		return 0;
	}

	return -EINVAL;
}


/**
 * pcmcia_request_window() - attempt to reserve iomem for PCMCIA devices
 * @p_dev: the associated PCMCIA device
 * @res: &struct resource pointing to p_dev->resource[2..5]
 * @speed: access speed
 *
 * pcmcia_request_window() attepts to reserve an iomem ranges specified in
 * &struct resource @res pointing to one of the entries in
 * &struct pcmcia_device @p_dev->resource[2..5]. The "start" value is the
 * requested start of the IO mem resource; "end" reflects the size
 * requested.
 */
int pcmcia_request_window(struct pcmcia_device *p_dev, struct resource *res,
			unsigned int speed)
{
	struct pcmcia_socket *s = p_dev->socket;
	pccard_mem_map *win;
	u_long align;
	int w;

	dev_dbg(&p_dev->dev, "request_window %pR %d\n", res, speed);

	if (!(s->state & SOCKET_PRESENT)) {
		dev_dbg(&p_dev->dev, "No card present\n");
		return -ENODEV;
	}

	/* Window size defaults to smallest available */
	if (res->end == 0)
		res->end = s->map_size;
	align = (s->features & SS_CAP_MEM_ALIGN) ? res->end : s->map_size;
	if (res->end & (s->map_size-1)) {
		dev_dbg(&p_dev->dev, "invalid map size\n");
		return -EINVAL;
	}
	if ((res->start && (s->features & SS_CAP_STATIC_MAP)) ||
	    (res->start & (align-1))) {
		dev_dbg(&p_dev->dev, "invalid base address\n");
		return -EINVAL;
	}
	if (res->start)
		align = 0;

	/* Allocate system memory window */
	mutex_lock(&s->ops_mutex);
	for (w = 0; w < MAX_WIN; w++)
		if (!(s->state & SOCKET_WIN_REQ(w)))
			break;
	if (w == MAX_WIN) {
		dev_dbg(&p_dev->dev, "all windows are used already\n");
		mutex_unlock(&s->ops_mutex);
		return -EINVAL;
	}

	win = &s->win[w];

	if (!(s->features & SS_CAP_STATIC_MAP)) {
		win->res = pcmcia_find_mem_region(res->start, res->end, align,
						0, s);
		if (!win->res) {
			dev_dbg(&p_dev->dev, "allocating mem region failed\n");
			mutex_unlock(&s->ops_mutex);
			return -EINVAL;
		}
	}
	p_dev->_win |= CLIENT_WIN_REQ(w);

	/* Configure the socket controller */
	win->map = w+1;
	win->flags = res->flags & WIN_FLAGS_MAP;
	win->speed = speed;
	win->card_start = 0;

	if (s->ops->set_mem_map(s, win) != 0) {
		dev_dbg(&p_dev->dev, "failed to set memory mapping\n");
		mutex_unlock(&s->ops_mutex);
		return -EIO;
	}
	s->state |= SOCKET_WIN_REQ(w);

	/* Return window handle */
	if (s->features & SS_CAP_STATIC_MAP)
		res->start = win->static_start;
	else
		res->start = win->res->start;

	/* convert to new-style resources */
	res->end += res->start - 1;
	res->flags &= ~WIN_FLAGS_REQ;
	res->flags |= (win->map << 2) | IORESOURCE_MEM;
	res->parent = win->res;
	if (win->res)
		request_resource(&iomem_resource, res);

	dev_dbg(&p_dev->dev, "request_window results in %pR\n", res);

	mutex_unlock(&s->ops_mutex);

	return 0;
} /* pcmcia_request_window */
EXPORT_SYMBOL(pcmcia_request_window);


/**
 * pcmcia_disable_device() - disable and clean up a PCMCIA device
 * @p_dev: the associated PCMCIA device
 *
 * pcmcia_disable_device() is the driver-callable counterpart to
 * pcmcia_enable_device(): If a PCMCIA device is no longer used,
 * drivers are expected to clean up and disable the device by calling
 * this function. Any I/O ranges (iomem and ioports) will be released,
 * the Vpp voltage will be set to 0, and IRQs will no longer be
 * generated -- at least if there is no other card function (of
 * multifunction devices) being used.
 */
void pcmcia_disable_device(struct pcmcia_device *p_dev)
{
	int i;

	dev_dbg(&p_dev->dev, "disabling device\n");

	for (i = 0; i < MAX_WIN; i++) {
		struct resource *res = p_dev->resource[MAX_IO_WIN + i];
		if (res->flags & WIN_FLAGS_REQ)
			pcmcia_release_window(p_dev, res);
	}

	pcmcia_release_configuration(p_dev);
	pcmcia_release_io(p_dev);
	if (p_dev->_irq) {
		free_irq(p_dev->irq, p_dev->priv);
		p_dev->_irq = 0;
	}
}
EXPORT_SYMBOL(pcmcia_disable_device);