Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1610 insertions, 0 deletions

diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
new file mode 100644
index 000000000..cf109d9a1
--- /dev/null
+++ b/drivers/pcmcia/cistpl.c
@@ -0,0 +1,1610 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cistpl.c -- 16-bit PCMCIA Card Information Structure parser
+ *
+ * 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.
+ *
+ * (C) 1999		David A. Hinds
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/security.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+
+#include <pcmcia/ss.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+#include "cs_internal.h"
+
+static const u_char mantissa[] = {
+    10, 12, 13, 15, 20, 25, 30, 35,
+    40, 45, 50, 55, 60, 70, 80, 90
+};
+
+static const u_int exponent[] = {
+    1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
+};
+
+/* Convert an extended speed byte to a time in nanoseconds */
+#define SPEED_CVT(v) \
+    (mantissa[(((v)>>3)&15)-1] * exponent[(v)&7] / 10)
+/* Convert a power byte to a current in 0.1 microamps */
+#define POWER_CVT(v) \
+    (mantissa[((v)>>3)&15] * exponent[(v)&7] / 10)
+#define POWER_SCALE(v)		(exponent[(v)&7])
+
+/* Upper limit on reasonable # of tuples */
+#define MAX_TUPLES		200
+
+/* Bits in IRQInfo1 field */
+#define IRQ_INFO2_VALID		0x10
+
+/* 16-bit CIS? */
+static int cis_width;
+module_param(cis_width, int, 0444);
+
+void release_cis_mem(struct pcmcia_socket *s)
+{
+	mutex_lock(&s->ops_mutex);
+	if (s->cis_mem.flags & MAP_ACTIVE) {
+		s->cis_mem.flags &= ~MAP_ACTIVE;
+		s->ops->set_mem_map(s, &s->cis_mem);
+		if (s->cis_mem.res) {
+			release_resource(s->cis_mem.res);
+			kfree(s->cis_mem.res);
+			s->cis_mem.res = NULL;
+		}
+		iounmap(s->cis_virt);
+		s->cis_virt = NULL;
+	}
+	mutex_unlock(&s->ops_mutex);
+}
+
+/**
+ * set_cis_map() - map the card memory at "card_offset" into virtual space.
+ *
+ * If flags & MAP_ATTRIB, map the attribute space, otherwise
+ * map the memory space.
+ *
+ * Must be called with ops_mutex held.
+ */
+static void __iomem *set_cis_map(struct pcmcia_socket *s,
+				unsigned int card_offset, unsigned int flags)
+{
+	pccard_mem_map *mem = &s->cis_mem;
+	int ret;
+
+	if (!(s->features & SS_CAP_STATIC_MAP) && (mem->res == NULL)) {
+		mem->res = pcmcia_find_mem_region(0, s->map_size,
+						s->map_size, 0, s);
+		if (mem->res == NULL) {
+			dev_notice(&s->dev, "cs: unable to map card memory!\n");
+			return NULL;
+		}
+		s->cis_virt = NULL;
+	}
+
+	if (!(s->features & SS_CAP_STATIC_MAP) && (!s->cis_virt))
+		s->cis_virt = ioremap(mem->res->start, s->map_size);
+
+	mem->card_start = card_offset;
+	mem->flags = flags;
+
+	ret = s->ops->set_mem_map(s, mem);
+	if (ret) {
+		iounmap(s->cis_virt);
+		s->cis_virt = NULL;
+		return NULL;
+	}
+
+	if (s->features & SS_CAP_STATIC_MAP) {
+		if (s->cis_virt)
+			iounmap(s->cis_virt);
+		s->cis_virt = ioremap(mem->static_start, s->map_size);
+	}
+
+	return s->cis_virt;
+}
+
+
+/* Bits in attr field */
+#define IS_ATTR		1
+#define IS_INDIRECT	8
+
+/**
+ * pcmcia_read_cis_mem() - low-level function to read CIS memory
+ *
+ * must be called with ops_mutex held
+ */
+int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
+		 u_int len, void *ptr)
+{
+	void __iomem *sys, *end;
+	unsigned char *buf = ptr;
+
+	dev_dbg(&s->dev, "pcmcia_read_cis_mem(%d, %#x, %u)\n", attr, addr, len);
+
+	if (attr & IS_INDIRECT) {
+		/* Indirect accesses use a bunch of special registers at fixed
+		   locations in common memory */
+		u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
+		if (attr & IS_ATTR) {
+			addr *= 2;
+			flags = ICTRL0_AUTOINC;
+		}
+
+		sys = set_cis_map(s, 0, MAP_ACTIVE |
+				((cis_width) ? MAP_16BIT : 0));
+		if (!sys) {
+			dev_dbg(&s->dev, "could not map memory\n");
+			memset(ptr, 0xff, len);
+			return -1;
+		}
+
+		writeb(flags, sys+CISREG_ICTRL0);
+		writeb(addr & 0xff, sys+CISREG_IADDR0);
+		writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
+		writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
+		writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
+		for ( ; len > 0; len--, buf++)
+			*buf = readb(sys+CISREG_IDATA0);
+	} else {
+		u_int inc = 1, card_offset, flags;
+
+		if (addr > CISTPL_MAX_CIS_SIZE) {
+			dev_dbg(&s->dev,
+				"attempt to read CIS mem at addr %#x", addr);
+			memset(ptr, 0xff, len);
+			return -1;
+		}
+
+		flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
+		if (attr) {
+			flags |= MAP_ATTRIB;
+			inc++;
+			addr *= 2;
+		}
+
+		card_offset = addr & ~(s->map_size-1);
+		while (len) {
+			sys = set_cis_map(s, card_offset, flags);
+			if (!sys) {
+				dev_dbg(&s->dev, "could not map memory\n");
+				memset(ptr, 0xff, len);
+				return -1;
+			}
+			end = sys + s->map_size;
+			sys = sys + (addr & (s->map_size-1));
+			for ( ; len > 0; len--, buf++, sys += inc) {
+				if (sys == end)
+					break;
+				*buf = readb(sys);
+			}
+			card_offset += s->map_size;
+			addr = 0;
+		}
+	}
+	dev_dbg(&s->dev, "  %#2.2x %#2.2x %#2.2x %#2.2x ...\n",
+		*(u_char *)(ptr+0), *(u_char *)(ptr+1),
+		*(u_char *)(ptr+2), *(u_char *)(ptr+3));
+	return 0;
+}
+
+
+/**
+ * pcmcia_write_cis_mem() - low-level function to write CIS memory
+ *
+ * Probably only useful for writing one-byte registers. Must be called
+ * with ops_mutex held.
+ */
+int pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
+		   u_int len, void *ptr)
+{
+	void __iomem *sys, *end;
+	unsigned char *buf = ptr;
+
+	dev_dbg(&s->dev,
+		"pcmcia_write_cis_mem(%d, %#x, %u)\n", attr, addr, len);
+
+	if (attr & IS_INDIRECT) {
+		/* Indirect accesses use a bunch of special registers at fixed
+		   locations in common memory */
+		u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
+		if (attr & IS_ATTR) {
+			addr *= 2;
+			flags = ICTRL0_AUTOINC;
+		}
+
+		sys = set_cis_map(s, 0, MAP_ACTIVE |
+				((cis_width) ? MAP_16BIT : 0));
+		if (!sys) {
+			dev_dbg(&s->dev, "could not map memory\n");
+			return -EINVAL;
+		}
+
+		writeb(flags, sys+CISREG_ICTRL0);
+		writeb(addr & 0xff, sys+CISREG_IADDR0);
+		writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
+		writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
+		writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
+		for ( ; len > 0; len--, buf++)
+			writeb(*buf, sys+CISREG_IDATA0);
+	} else {
+		u_int inc = 1, card_offset, flags;
+
+		flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
+		if (attr & IS_ATTR) {
+			flags |= MAP_ATTRIB;
+			inc++;
+			addr *= 2;
+		}
+
+		card_offset = addr & ~(s->map_size-1);
+		while (len) {
+			sys = set_cis_map(s, card_offset, flags);
+			if (!sys) {
+				dev_dbg(&s->dev, "could not map memory\n");
+				return -EINVAL;
+			}
+
+			end = sys + s->map_size;
+			sys = sys + (addr & (s->map_size-1));
+			for ( ; len > 0; len--, buf++, sys += inc) {
+				if (sys == end)
+					break;
+				writeb(*buf, sys);
+			}
+			card_offset += s->map_size;
+			addr = 0;
+		}
+	}
+	return 0;
+}
+
+
+/**
+ * read_cis_cache() - read CIS memory or its associated cache
+ *
+ * This is a wrapper around read_cis_mem, with the same interface,
+ * but which caches information, for cards whose CIS may not be
+ * readable all the time.
+ */
+static int read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
+			size_t len, void *ptr)
+{
+	struct cis_cache_entry *cis;
+	int ret = 0;
+
+	if (s->state & SOCKET_CARDBUS)
+		return -EINVAL;
+
+	mutex_lock(&s->ops_mutex);
+	if (s->fake_cis) {
+		if (s->fake_cis_len >= addr+len)
+			memcpy(ptr, s->fake_cis+addr, len);
+		else {
+			memset(ptr, 0xff, len);
+			ret = -EINVAL;
+		}
+		mutex_unlock(&s->ops_mutex);
+		return ret;
+	}
+
+	list_for_each_entry(cis, &s->cis_cache, node) {
+		if (cis->addr == addr && cis->len == len && cis->attr == attr) {
+			memcpy(ptr, cis->cache, len);
+			mutex_unlock(&s->ops_mutex);
+			return 0;
+		}
+	}
+
+	ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr);
+
+	if (ret == 0) {
+		/* Copy data into the cache */
+		cis = kmalloc(sizeof(struct cis_cache_entry) + len, GFP_KERNEL);
+		if (cis) {
+			cis->addr = addr;
+			cis->len = len;
+			cis->attr = attr;
+			memcpy(cis->cache, ptr, len);
+			list_add(&cis->node, &s->cis_cache);
+		}
+	}
+	mutex_unlock(&s->ops_mutex);
+
+	return ret;
+}
+
+static void
+remove_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, u_int len)
+{
+	struct cis_cache_entry *cis;
+
+	mutex_lock(&s->ops_mutex);
+	list_for_each_entry(cis, &s->cis_cache, node)
+		if (cis->addr == addr && cis->len == len && cis->attr == attr) {
+			list_del(&cis->node);
+			kfree(cis);
+			break;
+		}
+	mutex_unlock(&s->ops_mutex);
+}
+
+/**
+ * destroy_cis_cache() - destroy the CIS cache
+ * @s:		pcmcia_socket for which CIS cache shall be destroyed
+ *
+ * This destroys the CIS cache but keeps any fake CIS alive. Must be
+ * called with ops_mutex held.
+ */
+void destroy_cis_cache(struct pcmcia_socket *s)
+{
+	struct list_head *l, *n;
+	struct cis_cache_entry *cis;
+
+	list_for_each_safe(l, n, &s->cis_cache) {
+		cis = list_entry(l, struct cis_cache_entry, node);
+		list_del(&cis->node);
+		kfree(cis);
+	}
+}
+
+/**
+ * verify_cis_cache() - does the CIS match what is in the CIS cache?
+ */
+int verify_cis_cache(struct pcmcia_socket *s)
+{
+	struct cis_cache_entry *cis;
+	char *buf;
+	int ret;
+
+	if (s->state & SOCKET_CARDBUS)
+		return -EINVAL;
+
+	buf = kmalloc(256, GFP_KERNEL);
+	if (buf == NULL) {
+		dev_warn(&s->dev, "no memory for verifying CIS\n");
+		return -ENOMEM;
+	}
+	mutex_lock(&s->ops_mutex);
+	list_for_each_entry(cis, &s->cis_cache, node) {
+		int len = cis->len;
+
+		if (len > 256)
+			len = 256;
+
+		ret = pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
+		if (ret || memcmp(buf, cis->cache, len) != 0) {
+			kfree(buf);
+			mutex_unlock(&s->ops_mutex);
+			return -1;
+		}
+	}
+	kfree(buf);
+	mutex_unlock(&s->ops_mutex);
+	return 0;
+}
+
+/**
+ * pcmcia_replace_cis() - use a replacement CIS instead of the card's CIS
+ *
+ * For really bad cards, we provide a facility for uploading a
+ * replacement CIS.
+ */
+int pcmcia_replace_cis(struct pcmcia_socket *s,
+		       const u8 *data, const size_t len)
+{
+	if (len > CISTPL_MAX_CIS_SIZE) {
+		dev_warn(&s->dev, "replacement CIS too big\n");
+		return -EINVAL;
+	}
+	mutex_lock(&s->ops_mutex);
+	kfree(s->fake_cis);
+	s->fake_cis = kmalloc(len, GFP_KERNEL);
+	if (s->fake_cis == NULL) {
+		dev_warn(&s->dev, "no memory to replace CIS\n");
+		mutex_unlock(&s->ops_mutex);
+		return -ENOMEM;
+	}
+	s->fake_cis_len = len;
+	memcpy(s->fake_cis, data, len);
+	dev_info(&s->dev, "Using replacement CIS\n");
+	mutex_unlock(&s->ops_mutex);
+	return 0;
+}
+
+/* The high-level CIS tuple services */
+
+struct tuple_flags {
+	u_int		link_space:4;
+	u_int		has_link:1;
+	u_int		mfc_fn:3;
+	u_int		space:4;
+};
+
+#define LINK_SPACE(f)	(((struct tuple_flags *)(&(f)))->link_space)
+#define HAS_LINK(f)	(((struct tuple_flags *)(&(f)))->has_link)
+#define MFC_FN(f)	(((struct tuple_flags *)(&(f)))->mfc_fn)
+#define SPACE(f)	(((struct tuple_flags *)(&(f)))->space)
+
+int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function,
+			tuple_t *tuple)
+{
+	if (!s)
+		return -EINVAL;
+
+	if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
+		return -ENODEV;
+	tuple->TupleLink = tuple->Flags = 0;
+
+	/* Assume presence of a LONGLINK_C to address 0 */
+	tuple->CISOffset = tuple->LinkOffset = 0;
+	SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
+
+	if ((s->functions > 1) && !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
+		cisdata_t req = tuple->DesiredTuple;
+		tuple->DesiredTuple = CISTPL_LONGLINK_MFC;
+		if (pccard_get_next_tuple(s, function, tuple) == 0) {
+			tuple->DesiredTuple = CISTPL_LINKTARGET;
+			if (pccard_get_next_tuple(s, function, tuple) != 0)
+				return -ENOSPC;
+		} else
+			tuple->CISOffset = tuple->TupleLink = 0;
+		tuple->DesiredTuple = req;
+	}
+	return pccard_get_next_tuple(s, function, tuple);
+}
+
+static int follow_link(struct pcmcia_socket *s, tuple_t *tuple)
+{
+	u_char link[5];
+	u_int ofs;
+	int ret;
+
+	if (MFC_FN(tuple->Flags)) {
+		/* Get indirect link from the MFC tuple */
+		ret = read_cis_cache(s, LINK_SPACE(tuple->Flags),
+				tuple->LinkOffset, 5, link);
+		if (ret)
+			return -1;
+		ofs = get_unaligned_le32(link + 1);
+		SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR);
+		/* Move to the next indirect link */
+		tuple->LinkOffset += 5;
+		MFC_FN(tuple->Flags)--;
+	} else if (HAS_LINK(tuple->Flags)) {
+		ofs = tuple->LinkOffset;
+		SPACE(tuple->Flags) = LINK_SPACE(tuple->Flags);
+		HAS_LINK(tuple->Flags) = 0;
+	} else
+		return -1;
+
+	if (SPACE(tuple->Flags)) {
+		/* This is ugly, but a common CIS error is to code the long
+		   link offset incorrectly, so we check the right spot... */
+		ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
+		if (ret)
+			return -1;
+		if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
+			(strncmp(link+2, "CIS", 3) == 0))
+			return ofs;
+		remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
+		/* Then, we try the wrong spot... */
+		ofs = ofs >> 1;
+	}
+	ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
+	if (ret)
+		return -1;
+	if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
+		(strncmp(link+2, "CIS", 3) == 0))
+		return ofs;
+	remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
+	return -1;
+}
+
+int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function,
+			tuple_t *tuple)
+{
+	u_char link[2], tmp;
+	int ofs, i, attr;
+	int ret;
+
+	if (!s)
+		return -EINVAL;
+	if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
+		return -ENODEV;
+
+	link[1] = tuple->TupleLink;
+	ofs = tuple->CISOffset + tuple->TupleLink;
+	attr = SPACE(tuple->Flags);
+
+	for (i = 0; i < MAX_TUPLES; i++) {
+		if (link[1] == 0xff)
+			link[0] = CISTPL_END;
+		else {
+			ret = read_cis_cache(s, attr, ofs, 2, link);
+			if (ret)
+				return -1;
+			if (link[0] == CISTPL_NULL) {
+				ofs++;
+				continue;
+			}
+		}
+
+		/* End of chain?  Follow long link if possible */
+		if (link[0] == CISTPL_END) {
+			ofs = follow_link(s, tuple);
+			if (ofs < 0)
+				return -ENOSPC;
+			attr = SPACE(tuple->Flags);
+			ret = read_cis_cache(s, attr, ofs, 2, link);
+			if (ret)
+				return -1;
+		}
+
+		/* Is this a link tuple?  Make a note of it */
+		if ((link[0] == CISTPL_LONGLINK_A) ||
+			(link[0] == CISTPL_LONGLINK_C) ||
+			(link[0] == CISTPL_LONGLINK_MFC) ||
+			(link[0] == CISTPL_LINKTARGET) ||
+			(link[0] == CISTPL_INDIRECT) ||
+			(link[0] == CISTPL_NO_LINK)) {
+			switch (link[0]) {
+			case CISTPL_LONGLINK_A:
+				HAS_LINK(tuple->Flags) = 1;
+				LINK_SPACE(tuple->Flags) = attr | IS_ATTR;
+				ret = read_cis_cache(s, attr, ofs+2, 4,
+						&tuple->LinkOffset);
+				if (ret)
+					return -1;
+				break;
+			case CISTPL_LONGLINK_C:
+				HAS_LINK(tuple->Flags) = 1;
+				LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR;
+				ret = read_cis_cache(s, attr, ofs+2, 4,
+						&tuple->LinkOffset);
+				if (ret)
+					return -1;
+				break;
+			case CISTPL_INDIRECT:
+				HAS_LINK(tuple->Flags) = 1;
+				LINK_SPACE(tuple->Flags) = IS_ATTR |
+					IS_INDIRECT;
+				tuple->LinkOffset = 0;
+				break;
+			case CISTPL_LONGLINK_MFC:
+				tuple->LinkOffset = ofs + 3;
+				LINK_SPACE(tuple->Flags) = attr;
+				if (function == BIND_FN_ALL) {
+					/* Follow all the MFC links */
+					ret = read_cis_cache(s, attr, ofs+2,
+							1, &tmp);
+					if (ret)
+						return -1;
+					MFC_FN(tuple->Flags) = tmp;
+				} else {
+					/* Follow exactly one of the links */
+					MFC_FN(tuple->Flags) = 1;
+					tuple->LinkOffset += function * 5;
+				}
+				break;
+			case CISTPL_NO_LINK:
+				HAS_LINK(tuple->Flags) = 0;
+				break;
+			}
+			if ((tuple->Attributes & TUPLE_RETURN_LINK) &&
+				(tuple->DesiredTuple == RETURN_FIRST_TUPLE))
+				break;
+		} else
+			if (tuple->DesiredTuple == RETURN_FIRST_TUPLE)
+				break;
+
+		if (link[0] == tuple->DesiredTuple)
+			break;
+		ofs += link[1] + 2;
+	}
+	if (i == MAX_TUPLES) {
+		dev_dbg(&s->dev, "cs: overrun in pcmcia_get_next_tuple\n");
+		return -ENOSPC;
+	}
+
+	tuple->TupleCode = link[0];
+	tuple->TupleLink = link[1];
+	tuple->CISOffset = ofs + 2;
+	return 0;
+}
+
+int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple)
+{
+	u_int len;
+	int ret;
+
+	if (!s)
+		return -EINVAL;
+
+	if (tuple->TupleLink < tuple->TupleOffset)
+		return -ENOSPC;
+	len = tuple->TupleLink - tuple->TupleOffset;
+	tuple->TupleDataLen = tuple->TupleLink;
+	if (len == 0)
+		return 0;
+	ret = read_cis_cache(s, SPACE(tuple->Flags),
+			tuple->CISOffset + tuple->TupleOffset,
+			min(len, (u_int) tuple->TupleDataMax),
+			tuple->TupleData);
+	if (ret)
+		return -1;
+	return 0;
+}
+
+
+/* Parsing routines for individual tuples */
+
+static int parse_device(tuple_t *tuple, cistpl_device_t *device)
+{
+	int i;
+	u_char scale;
+	u_char *p, *q;
+
+	p = (u_char *)tuple->TupleData;
+	q = p + tuple->TupleDataLen;
+
+	device->ndev = 0;
+	for (i = 0; i < CISTPL_MAX_DEVICES; i++) {
+
+		if (*p == 0xff)
+			break;
+		device->dev[i].type = (*p >> 4);
+		device->dev[i].wp = (*p & 0x08) ? 1 : 0;
+		switch (*p & 0x07) {
+		case 0:
+			device->dev[i].speed = 0;
+			break;
+		case 1:
+			device->dev[i].speed = 250;
+			break;
+		case 2:
+			device->dev[i].speed = 200;
+			break;
+		case 3:
+			device->dev[i].speed = 150;
+			break;
+		case 4:
+			device->dev[i].speed = 100;
+			break;
+		case 7:
+			if (++p == q)
+				return -EINVAL;
+			device->dev[i].speed = SPEED_CVT(*p);
+			while (*p & 0x80)
+				if (++p == q)
+					return -EINVAL;
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		if (++p == q)
+			return -EINVAL;
+		if (*p == 0xff)
+			break;
+		scale = *p & 7;
+		if (scale == 7)
+			return -EINVAL;
+		device->dev[i].size = ((*p >> 3) + 1) * (512 << (scale*2));
+		device->ndev++;
+		if (++p == q)
+			break;
+	}
+
+	return 0;
+}
+
+
+static int parse_checksum(tuple_t *tuple, cistpl_checksum_t *csum)
+{
+	u_char *p;
+	if (tuple->TupleDataLen < 5)
+		return -EINVAL;
+	p = (u_char *) tuple->TupleData;
+	csum->addr = tuple->CISOffset + get_unaligned_le16(p) - 2;
+	csum->len = get_unaligned_le16(p + 2);
+	csum->sum = *(p + 4);
+	return 0;
+}
+
+
+static int parse_longlink(tuple_t *tuple, cistpl_longlink_t *link)
+{
+	if (tuple->TupleDataLen < 4)
+		return -EINVAL;
+	link->addr = get_unaligned_le32(tuple->TupleData);
+	return 0;
+}
+
+
+static int parse_longlink_mfc(tuple_t *tuple, cistpl_longlink_mfc_t *link)
+{
+	u_char *p;
+	int i;
+
+	p = (u_char *)tuple->TupleData;
+
+	link->nfn = *p; p++;
+	if (tuple->TupleDataLen <= link->nfn*5)
+		return -EINVAL;
+	for (i = 0; i < link->nfn; i++) {
+		link->fn[i].space = *p; p++;
+		link->fn[i].addr = get_unaligned_le32(p);
+		p += 4;
+	}
+	return 0;
+}
+
+
+static int parse_strings(u_char *p, u_char *q, int max,
+			 char *s, u_char *ofs, u_char *found)
+{
+	int i, j, ns;
+
+	if (p == q)
+		return -EINVAL;
+	ns = 0; j = 0;
+	for (i = 0; i < max; i++) {
+		if (*p == 0xff)
+			break;
+		ofs[i] = j;
+		ns++;
+		for (;;) {
+			s[j++] = (*p == 0xff) ? '\0' : *p;
+			if ((*p == '\0') || (*p == 0xff))
+				break;
+			if (++p == q)
+				return -EINVAL;
+		}
+		if ((*p == 0xff) || (++p == q))
+			break;
+	}
+	if (found) {
+		*found = ns;
+		return 0;
+	}
+
+	return (ns == max) ? 0 : -EINVAL;
+}
+
+
+static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1)
+{
+	u_char *p, *q;
+
+	p = (u_char *)tuple->TupleData;
+	q = p + tuple->TupleDataLen;
+
+	vers_1->major = *p; p++;
+	vers_1->minor = *p; p++;
+	if (p >= q)
+		return -EINVAL;
+
+	return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS,
+			vers_1->str, vers_1->ofs, &vers_1->ns);
+}
+
+
+static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr)
+{
+	u_char *p, *q;
+
+	p = (u_char *)tuple->TupleData;
+	q = p + tuple->TupleDataLen;
+
+	return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS,
+			altstr->str, altstr->ofs, &altstr->ns);
+}
+
+
+static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec)
+{
+	u_char *p, *q;
+	int nid;
+
+	p = (u_char *)tuple->TupleData;
+	q = p + tuple->TupleDataLen;
+
+	for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) {
+		if (p > q-2)
+			break;
+		jedec->id[nid].mfr = p[0];
+		jedec->id[nid].info = p[1];
+		p += 2;
+	}
+	jedec->nid = nid;
+	return 0;
+}
+
+
+static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m)
+{
+	if (tuple->TupleDataLen < 4)
+		return -EINVAL;
+	m->manf = get_unaligned_le16(tuple->TupleData);
+	m->card = get_unaligned_le16(tuple->TupleData + 2);
+	return 0;
+}
+
+
+static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f)
+{
+	u_char *p;
+	if (tuple->TupleDataLen < 2)
+		return -EINVAL;
+	p = (u_char *)tuple->TupleData;
+	f->func = p[0];
+	f->sysinit = p[1];
+	return 0;
+}
+
+
+static int parse_funce(tuple_t *tuple, cistpl_funce_t *f)
+{
+	u_char *p;
+	int i;
+	if (tuple->TupleDataLen < 1)
+		return -EINVAL;
+	p = (u_char *)tuple->TupleData;
+	f->type = p[0];
+	for (i = 1; i < tuple->TupleDataLen; i++)
+		f->data[i-1] = p[i];
+	return 0;
+}
+
+
+static int parse_config(tuple_t *tuple, cistpl_config_t *config)
+{
+	int rasz, rmsz, i;
+	u_char *p;
+
+	p = (u_char *)tuple->TupleData;
+	rasz = *p & 0x03;
+	rmsz = (*p & 0x3c) >> 2;
+	if (tuple->TupleDataLen < rasz+rmsz+4)
+		return -EINVAL;
+	config->last_idx = *(++p);
+	p++;
+	config->base = 0;
+	for (i = 0; i <= rasz; i++)
+		config->base += p[i] << (8*i);
+	p += rasz+1;
+	for (i = 0; i < 4; i++)
+		config->rmask[i] = 0;
+	for (i = 0; i <= rmsz; i++)
+		config->rmask[i>>2] += p[i] << (8*(i%4));
+	config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4);
+	return 0;
+}
+
+/* The following routines are all used to parse the nightmarish
+ * config table entries.
+ */
+
+static u_char *parse_power(u_char *p, u_char *q, cistpl_power_t *pwr)
+{
+	int i;
+	u_int scale;
+
+	if (p == q)
+		return NULL;
+	pwr->present = *p;
+	pwr->flags = 0;
+	p++;
+	for (i = 0; i < 7; i++)
+		if (pwr->present & (1<<i)) {
+			if (p == q)
+				return NULL;
+			pwr->param[i] = POWER_CVT(*p);
+			scale = POWER_SCALE(*p);
+			while (*p & 0x80) {
+				if (++p == q)
+					return NULL;
+				if ((*p & 0x7f) < 100)
+					pwr->param[i] +=
+						(*p & 0x7f) * scale / 100;
+				else if (*p == 0x7d)
+					pwr->flags |= CISTPL_POWER_HIGHZ_OK;
+				else if (*p == 0x7e)
+					pwr->param[i] = 0;
+				else if (*p == 0x7f)
+					pwr->flags |= CISTPL_POWER_HIGHZ_REQ;
+				else
+					return NULL;
+			}
+			p++;
+		}
+	return p;
+}
+
+
+static u_char *parse_timing(u_char *p, u_char *q, cistpl_timing_t *timing)
+{
+	u_char scale;
+
+	if (p == q)
+		return NULL;
+	scale = *p;
+	if ((scale & 3) != 3) {
+		if (++p == q)
+			return NULL;
+		timing->wait = SPEED_CVT(*p);
+		timing->waitscale = exponent[scale & 3];
+	} else
+		timing->wait = 0;
+	scale >>= 2;
+	if ((scale & 7) != 7) {
+		if (++p == q)
+			return NULL;
+		timing->ready = SPEED_CVT(*p);
+		timing->rdyscale = exponent[scale & 7];
+	} else
+		timing->ready = 0;
+	scale >>= 3;
+	if (scale != 7) {
+		if (++p == q)
+			return NULL;
+		timing->reserved = SPEED_CVT(*p);
+		timing->rsvscale = exponent[scale];
+	} else
+		timing->reserved = 0;
+	p++;
+	return p;
+}
+
+
+static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io)
+{
+	int i, j, bsz, lsz;
+
+	if (p == q)
+		return NULL;
+	io->flags = *p;
+
+	if (!(*p & 0x80)) {
+		io->nwin = 1;
+		io->win[0].base = 0;
+		io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK));
+		return p+1;
+	}
+
+	if (++p == q)
+		return NULL;
+	io->nwin = (*p & 0x0f) + 1;
+	bsz = (*p & 0x30) >> 4;
+	if (bsz == 3)
+		bsz++;
+	lsz = (*p & 0xc0) >> 6;
+	if (lsz == 3)
+		lsz++;
+	p++;
+
+	for (i = 0; i < io->nwin; i++) {
+		io->win[i].base = 0;
+		io->win[i].len = 1;
+		for (j = 0; j < bsz; j++, p++) {
+			if (p == q)
+				return NULL;
+			io->win[i].base += *p << (j*8);
+		}
+		for (j = 0; j < lsz; j++, p++) {
+			if (p == q)
+				return NULL;
+			io->win[i].len += *p << (j*8);
+		}
+	}
+	return p;
+}
+
+
+static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem)
+{
+	int i, j, asz, lsz, has_ha;
+	u_int len, ca, ha;
+
+	if (p == q)
+		return NULL;
+
+	mem->nwin = (*p & 0x07) + 1;
+	lsz = (*p & 0x18) >> 3;
+	asz = (*p & 0x60) >> 5;
+	has_ha = (*p & 0x80);
+	if (++p == q)
+		return NULL;
+
+	for (i = 0; i < mem->nwin; i++) {
+		len = ca = ha = 0;
+		for (j = 0; j < lsz; j++, p++) {
+			if (p == q)
+				return NULL;
+			len += *p << (j*8);
+		}
+		for (j = 0; j < asz; j++, p++) {
+			if (p == q)
+				return NULL;
+			ca += *p << (j*8);
+		}
+		if (has_ha)
+			for (j = 0; j < asz; j++, p++) {
+				if (p == q)
+					return NULL;
+				ha += *p << (j*8);
+			}
+		mem->win[i].len = len << 8;
+		mem->win[i].card_addr = ca << 8;
+		mem->win[i].host_addr = ha << 8;
+	}
+	return p;
+}
+
+
+static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq)
+{
+	if (p == q)
+		return NULL;
+	irq->IRQInfo1 = *p; p++;
+	if (irq->IRQInfo1 & IRQ_INFO2_VALID) {
+		if (p+2 > q)
+			return NULL;
+		irq->IRQInfo2 = (p[1]<<8) + p[0];
+		p += 2;
+	}
+	return p;
+}
+
+
+static int parse_cftable_entry(tuple_t *tuple,
+			       cistpl_cftable_entry_t *entry)
+{
+	u_char *p, *q, features;
+
+	p = tuple->TupleData;
+	q = p + tuple->TupleDataLen;
+	entry->index = *p & 0x3f;
+	entry->flags = 0;
+	if (*p & 0x40)
+		entry->flags |= CISTPL_CFTABLE_DEFAULT;
+	if (*p & 0x80) {
+		if (++p == q)
+			return -EINVAL;
+		if (*p & 0x10)
+			entry->flags |= CISTPL_CFTABLE_BVDS;
+		if (*p & 0x20)
+			entry->flags |= CISTPL_CFTABLE_WP;
+		if (*p & 0x40)
+			entry->flags |= CISTPL_CFTABLE_RDYBSY;
+		if (*p & 0x80)
+			entry->flags |= CISTPL_CFTABLE_MWAIT;
+		entry->interface = *p & 0x0f;
+	} else
+		entry->interface = 0;
+
+	/* Process optional features */
+	if (++p == q)
+		return -EINVAL;
+	features = *p; p++;
+
+	/* Power options */
+	if ((features & 3) > 0) {
+		p = parse_power(p, q, &entry->vcc);
+		if (p == NULL)
+			return -EINVAL;
+	} else
+		entry->vcc.present = 0;
+	if ((features & 3) > 1) {
+		p = parse_power(p, q, &entry->vpp1);
+		if (p == NULL)
+			return -EINVAL;
+	} else
+		entry->vpp1.present = 0;
+	if ((features & 3) > 2) {
+		p = parse_power(p, q, &entry->vpp2);
+		if (p == NULL)
+			return -EINVAL;
+	} else
+		entry->vpp2.present = 0;
+
+	/* Timing options */
+	if (features & 0x04) {
+		p = parse_timing(p, q, &entry->timing);
+		if (p == NULL)
+			return -EINVAL;
+	} else {
+		entry->timing.wait = 0;
+		entry->timing.ready = 0;
+		entry->timing.reserved = 0;
+	}
+
+	/* I/O window options */
+	if (features & 0x08) {
+		p = parse_io(p, q, &entry->io);
+		if (p == NULL)
+			return -EINVAL;
+	} else
+		entry->io.nwin = 0;
+
+	/* Interrupt options */
+	if (features & 0x10) {
+		p = parse_irq(p, q, &entry->irq);
+		if (p == NULL)
+			return -EINVAL;
+	} else
+		entry->irq.IRQInfo1 = 0;
+
+	switch (features & 0x60) {
+	case 0x00:
+		entry->mem.nwin = 0;
+		break;
+	case 0x20:
+		entry->mem.nwin = 1;
+		entry->mem.win[0].len = get_unaligned_le16(p) << 8;
+		entry->mem.win[0].card_addr = 0;
+		entry->mem.win[0].host_addr = 0;
+		p += 2;
+		if (p > q)
+			return -EINVAL;
+		break;
+	case 0x40:
+		entry->mem.nwin = 1;
+		entry->mem.win[0].len = get_unaligned_le16(p) << 8;
+		entry->mem.win[0].card_addr = get_unaligned_le16(p + 2) << 8;
+		entry->mem.win[0].host_addr = 0;
+		p += 4;
+		if (p > q)
+			return -EINVAL;
+		break;
+	case 0x60:
+		p = parse_mem(p, q, &entry->mem);
+		if (p == NULL)
+			return -EINVAL;
+		break;
+	}
+
+	/* Misc features */
+	if (features & 0x80) {
+		if (p == q)
+			return -EINVAL;
+		entry->flags |= (*p << 8);
+		while (*p & 0x80)
+			if (++p == q)
+				return -EINVAL;
+		p++;
+	}
+
+	entry->subtuples = q-p;
+
+	return 0;
+}
+
+
+static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
+{
+	u_char *p, *q;
+	int n;
+
+	p = (u_char *)tuple->TupleData;
+	q = p + tuple->TupleDataLen;
+
+	for (n = 0; n < CISTPL_MAX_DEVICES; n++) {
+		if (p > q-6)
+			break;
+		geo->geo[n].buswidth = p[0];
+		geo->geo[n].erase_block = 1 << (p[1]-1);
+		geo->geo[n].read_block  = 1 << (p[2]-1);
+		geo->geo[n].write_block = 1 << (p[3]-1);
+		geo->geo[n].partition   = 1 << (p[4]-1);
+		geo->geo[n].interleave  = 1 << (p[5]-1);
+		p += 6;
+	}
+	geo->ngeo = n;
+	return 0;
+}
+
+
+static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2)
+{
+	u_char *p, *q;
+
+	if (tuple->TupleDataLen < 10)
+		return -EINVAL;
+
+	p = tuple->TupleData;
+	q = p + tuple->TupleDataLen;
+
+	v2->vers = p[0];
+	v2->comply = p[1];
+	v2->dindex = get_unaligned_le16(p + 2);
+	v2->vspec8 = p[6];
+	v2->vspec9 = p[7];
+	v2->nhdr = p[8];
+	p += 9;
+	return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL);
+}
+
+
+static int parse_org(tuple_t *tuple, cistpl_org_t *org)
+{
+	u_char *p, *q;
+	int i;
+
+	p = tuple->TupleData;
+	q = p + tuple->TupleDataLen;
+	if (p == q)
+		return -EINVAL;
+	org->data_org = *p;
+	if (++p == q)
+		return -EINVAL;
+	for (i = 0; i < 30; i++) {
+		org->desc[i] = *p;
+		if (*p == '\0')
+			break;
+		if (++p == q)
+			return -EINVAL;
+	}
+	return 0;
+}
+
+
+static int parse_format(tuple_t *tuple, cistpl_format_t *fmt)
+{
+	u_char *p;
+
+	if (tuple->TupleDataLen < 10)
+		return -EINVAL;
+
+	p = tuple->TupleData;
+
+	fmt->type = p[0];
+	fmt->edc = p[1];
+	fmt->offset = get_unaligned_le32(p + 2);
+	fmt->length = get_unaligned_le32(p + 6);
+
+	return 0;
+}
+
+
+int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse)
+{
+	int ret = 0;
+
+	if (tuple->TupleDataLen > tuple->TupleDataMax)
+		return -EINVAL;
+	switch (tuple->TupleCode) {
+	case CISTPL_DEVICE:
+	case CISTPL_DEVICE_A:
+		ret = parse_device(tuple, &parse->device);
+		break;
+	case CISTPL_CHECKSUM:
+		ret = parse_checksum(tuple, &parse->checksum);
+		break;
+	case CISTPL_LONGLINK_A:
+	case CISTPL_LONGLINK_C:
+		ret = parse_longlink(tuple, &parse->longlink);
+		break;
+	case CISTPL_LONGLINK_MFC:
+		ret = parse_longlink_mfc(tuple, &parse->longlink_mfc);
+		break;
+	case CISTPL_VERS_1:
+		ret = parse_vers_1(tuple, &parse->version_1);
+		break;
+	case CISTPL_ALTSTR:
+		ret = parse_altstr(tuple, &parse->altstr);
+		break;
+	case CISTPL_JEDEC_A:
+	case CISTPL_JEDEC_C:
+		ret = parse_jedec(tuple, &parse->jedec);
+		break;
+	case CISTPL_MANFID:
+		ret = parse_manfid(tuple, &parse->manfid);
+		break;
+	case CISTPL_FUNCID:
+		ret = parse_funcid(tuple, &parse->funcid);
+		break;
+	case CISTPL_FUNCE:
+		ret = parse_funce(tuple, &parse->funce);
+		break;
+	case CISTPL_CONFIG:
+		ret = parse_config(tuple, &parse->config);
+		break;
+	case CISTPL_CFTABLE_ENTRY:
+		ret = parse_cftable_entry(tuple, &parse->cftable_entry);
+		break;
+	case CISTPL_DEVICE_GEO:
+	case CISTPL_DEVICE_GEO_A:
+		ret = parse_device_geo(tuple, &parse->device_geo);
+		break;
+	case CISTPL_VERS_2:
+		ret = parse_vers_2(tuple, &parse->vers_2);
+		break;
+	case CISTPL_ORG:
+		ret = parse_org(tuple, &parse->org);
+		break;
+	case CISTPL_FORMAT:
+	case CISTPL_FORMAT_A:
+		ret = parse_format(tuple, &parse->format);
+		break;
+	case CISTPL_NO_LINK:
+	case CISTPL_LINKTARGET:
+		ret = 0;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	if (ret)
+		pr_debug("parse_tuple failed %d\n", ret);
+	return ret;
+}
+EXPORT_SYMBOL(pcmcia_parse_tuple);
+
+
+/**
+ * pccard_validate_cis() - check whether card has a sensible CIS
+ * @s:		the struct pcmcia_socket we are to check
+ * @info:	returns the number of tuples in the (valid) CIS, or 0
+ *
+ * This tries to determine if a card has a sensible CIS.  In @info, it
+ * returns the number of tuples in the CIS, or 0 if the CIS looks bad. The
+ * checks include making sure several critical tuples are present and
+ * valid; seeing if the total number of tuples is reasonable; and
+ * looking for tuples that use reserved codes.
+ *
+ * The function returns 0 on success.
+ */
+int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
+{
+	tuple_t *tuple;
+	cisparse_t *p;
+	unsigned int count = 0;
+	int ret, reserved, dev_ok = 0, ident_ok = 0;
+
+	if (!s)
+		return -EINVAL;
+
+	if (s->functions || !(s->state & SOCKET_PRESENT)) {
+		WARN_ON(1);
+		return -EINVAL;
+	}
+
+	/* We do not want to validate the CIS cache... */
+	mutex_lock(&s->ops_mutex);
+	destroy_cis_cache(s);
+	mutex_unlock(&s->ops_mutex);
+
+	tuple = kmalloc(sizeof(*tuple), GFP_KERNEL);
+	if (tuple == NULL) {
+		dev_warn(&s->dev, "no memory to validate CIS\n");
+		return -ENOMEM;
+	}
+	p = kmalloc(sizeof(*p), GFP_KERNEL);
+	if (p == NULL) {
+		kfree(tuple);
+		dev_warn(&s->dev, "no memory to validate CIS\n");
+		return -ENOMEM;
+	}
+
+	count = reserved = 0;
+	tuple->DesiredTuple = RETURN_FIRST_TUPLE;
+	tuple->Attributes = TUPLE_RETURN_COMMON;
+	ret = pccard_get_first_tuple(s, BIND_FN_ALL, tuple);
+	if (ret != 0)
+		goto done;
+
+	/* First tuple should be DEVICE; we should really have either that
+	   or a CFTABLE_ENTRY of some sort */
+	if ((tuple->TupleCode == CISTPL_DEVICE) ||
+	    (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY, p)) ||
+	    (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY_CB, p)))
+		dev_ok++;
+
+	/* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
+	   tuple, for card identification.  Certain old D-Link and Linksys
+	   cards have only a broken VERS_2 tuple; hence the bogus test. */
+	if ((pccard_read_tuple(s, BIND_FN_ALL, CISTPL_MANFID, p) == 0) ||
+	    (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_1, p) == 0) ||
+	    (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_2, p) != -ENOSPC))
+		ident_ok++;
+
+	if (!dev_ok && !ident_ok)
+		goto done;
+
+	for (count = 1; count < MAX_TUPLES; count++) {
+		ret = pccard_get_next_tuple(s, BIND_FN_ALL, tuple);
+		if (ret != 0)
+			break;
+		if (((tuple->TupleCode > 0x23) && (tuple->TupleCode < 0x40)) ||
+		    ((tuple->TupleCode > 0x47) && (tuple->TupleCode < 0x80)) ||
+		    ((tuple->TupleCode > 0x90) && (tuple->TupleCode < 0xff)))
+			reserved++;
+	}
+	if ((count == MAX_TUPLES) || (reserved > 5) ||
+		((!dev_ok || !ident_ok) && (count > 10)))
+		count = 0;
+
+	ret = 0;
+
+done:
+	/* invalidate CIS cache on failure */
+	if (!dev_ok || !ident_ok || !count) {
+		mutex_lock(&s->ops_mutex);
+		destroy_cis_cache(s);
+		mutex_unlock(&s->ops_mutex);
+		/* We differentiate between dev_ok, ident_ok and count
+		   failures to allow for an override for anonymous cards
+		   in ds.c */
+		if (!dev_ok || !ident_ok)
+			ret = -EIO;
+		else
+			ret = -EFAULT;
+	}
+
+	if (info)
+		*info = count;
+	kfree(tuple);
+	kfree(p);
+	return ret;
+}
+
+
+#define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
+
+static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf,
+				  loff_t off, size_t count)
+{
+	tuple_t tuple;
+	int status, i;
+	loff_t pointer = 0;
+	ssize_t ret = 0;
+	u_char *tuplebuffer;
+	u_char *tempbuffer;
+
+	tuplebuffer = kmalloc_array(256, sizeof(u_char), GFP_KERNEL);
+	if (!tuplebuffer)
+		return -ENOMEM;
+
+	tempbuffer = kmalloc_array(258, sizeof(u_char), GFP_KERNEL);
+	if (!tempbuffer) {
+		ret = -ENOMEM;
+		goto free_tuple;
+	}
+
+	memset(&tuple, 0, sizeof(tuple_t));
+
+	tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
+	tuple.DesiredTuple = RETURN_FIRST_TUPLE;
+	tuple.TupleOffset = 0;
+
+	status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
+	while (!status) {
+		tuple.TupleData = tuplebuffer;
+		tuple.TupleDataMax = 255;
+		memset(tuplebuffer, 0, sizeof(u_char) * 255);
+
+		status = pccard_get_tuple_data(s, &tuple);
+		if (status)
+			break;
+
+		if (off < (pointer + 2 + tuple.TupleDataLen)) {
+			tempbuffer[0] = tuple.TupleCode & 0xff;
+			tempbuffer[1] = tuple.TupleLink & 0xff;
+			for (i = 0; i < tuple.TupleDataLen; i++)
+				tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
+
+			for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
+				if (((i + pointer) >= off) &&
+				    (i + pointer) < (off + count)) {
+					buf[ret] = tempbuffer[i];
+					ret++;
+				}
+			}
+		}
+
+		pointer += 2 + tuple.TupleDataLen;
+
+		if (pointer >= (off + count))
+			break;
+
+		if (tuple.TupleCode == CISTPL_END)
+			break;
+		status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
+	}
+
+	kfree(tempbuffer);
+ free_tuple:
+	kfree(tuplebuffer);
+
+	return ret;
+}
+
+
+static ssize_t pccard_show_cis(struct file *filp, struct kobject *kobj,
+			       struct bin_attribute *bin_attr,
+			       char *buf, loff_t off, size_t count)
+{
+	unsigned int size = 0x200;
+
+	if (off >= size)
+		count = 0;
+	else {
+		struct pcmcia_socket *s;
+		unsigned int chains = 1;
+
+		if (off + count > size)
+			count = size - off;
+
+		s = to_socket(container_of(kobj, struct device, kobj));
+
+		if (!(s->state & SOCKET_PRESENT))
+			return -ENODEV;
+		if (!s->functions && pccard_validate_cis(s, &chains))
+			return -EIO;
+		if (!chains)
+			return -ENODATA;
+
+		count = pccard_extract_cis(s, buf, off, count);
+	}
+
+	return count;
+}
+
+
+static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj,
+				struct bin_attribute *bin_attr,
+				char *buf, loff_t off, size_t count)
+{
+	struct pcmcia_socket *s;
+	int error;
+
+	error = security_locked_down(LOCKDOWN_PCMCIA_CIS);
+	if (error)
+		return error;
+
+	s = to_socket(container_of(kobj, struct device, kobj));
+
+	if (off)
+		return -EINVAL;
+
+	if (count >= CISTPL_MAX_CIS_SIZE)
+		return -EINVAL;
+
+	if (!(s->state & SOCKET_PRESENT))
+		return -ENODEV;
+
+	error = pcmcia_replace_cis(s, buf, count);
+	if (error)
+		return -EIO;
+
+	pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
+
+	return count;
+}
+
+
+const struct bin_attribute pccard_cis_attr = {
+	.attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
+	.size = 0x200,
+	.read = pccard_show_cis,
+	.write = pccard_store_cis,
+};