Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1659 insertions, 0 deletions

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
new file mode 100644
index 00000000000..66150d08b5c
--- /dev/null
+++ b/drivers/pcmcia/ds.c
@@ -0,0 +1,1659 @@
+/*
+ * ds.c -- 16-bit PCMCIA core support
+ *
+ * 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.
+ *
+ * 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
+ * (C) 2003 - 2004	Dominik Brodowski
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/fcntl.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/timer.h>
+#include <linux/ioctl.h>
+#include <linux/proc_fs.h>
+#include <linux/poll.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/delay.h>
+#include <linux/kref.h>
+#include <linux/workqueue.h>
+
+#include <asm/atomic.h>
+
+#define IN_CARD_SERVICES
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/bulkmem.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+#include <pcmcia/ss.h>
+
+#include "cs_internal.h"
+
+/*====================================================================*/
+
+/* Module parameters */
+
+MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
+MODULE_DESCRIPTION("PCMCIA Driver Services");
+MODULE_LICENSE("GPL");
+
+#ifdef DEBUG
+int ds_pc_debug;
+
+module_param_named(pc_debug, ds_pc_debug, int, 0644);
+
+#define ds_dbg(lvl, fmt, arg...) do {				\
+	if (ds_pc_debug > (lvl))					\
+		printk(KERN_DEBUG "ds: " fmt , ## arg);		\
+} while (0)
+#else
+#define ds_dbg(lvl, fmt, arg...) do { } while (0)
+#endif
+
+/*====================================================================*/
+
+/* Device user information */
+#define MAX_EVENTS	32
+#define USER_MAGIC	0x7ea4
+#define CHECK_USER(u) \
+    (((u) == NULL) || ((u)->user_magic != USER_MAGIC))
+typedef struct user_info_t {
+    u_int		user_magic;
+    int			event_head, event_tail;
+    event_t		event[MAX_EVENTS];
+    struct user_info_t	*next;
+    struct pcmcia_bus_socket *socket;
+} user_info_t;
+
+/* Socket state information */
+struct pcmcia_bus_socket {
+	struct kref		refcount;
+	struct pcmcia_callback	callback;
+	int			state;
+	user_info_t		*user;
+	wait_queue_head_t	queue;
+	struct pcmcia_socket	*parent;
+
+	/* the PCMCIA devices connected to this socket (normally one, more
+	 * for multifunction devices: */
+	struct list_head	devices_list;
+	u8			device_count; /* the number of devices, used
+					       * only internally and subject
+					       * to incorrectness and change */
+};
+static spinlock_t pcmcia_dev_list_lock;
+
+#define DS_SOCKET_PRESENT		0x01
+#define DS_SOCKET_BUSY			0x02
+#define DS_SOCKET_REMOVAL_PENDING	0x10
+#define DS_SOCKET_DEAD			0x80
+
+/*====================================================================*/
+
+static int major_dev = -1;
+
+static int unbind_request(struct pcmcia_bus_socket *s);
+
+/*====================================================================*/
+
+/* code which was in cs.c before */
+
+/* String tables for error messages */
+
+typedef struct lookup_t {
+    int key;
+    char *msg;
+} lookup_t;
+
+static const lookup_t error_table[] = {
+    { CS_SUCCESS,		"Operation succeeded" },
+    { CS_BAD_ADAPTER,		"Bad adapter" },
+    { CS_BAD_ATTRIBUTE, 	"Bad attribute", },
+    { CS_BAD_BASE,		"Bad base address" },
+    { CS_BAD_EDC,		"Bad EDC" },
+    { CS_BAD_IRQ,		"Bad IRQ" },
+    { CS_BAD_OFFSET,		"Bad offset" },
+    { CS_BAD_PAGE,		"Bad page number" },
+    { CS_READ_FAILURE,		"Read failure" },
+    { CS_BAD_SIZE,		"Bad size" },
+    { CS_BAD_SOCKET,		"Bad socket" },
+    { CS_BAD_TYPE,		"Bad type" },
+    { CS_BAD_VCC,		"Bad Vcc" },
+    { CS_BAD_VPP,		"Bad Vpp" },
+    { CS_BAD_WINDOW,		"Bad window" },
+    { CS_WRITE_FAILURE,		"Write failure" },
+    { CS_NO_CARD,		"No card present" },
+    { CS_UNSUPPORTED_FUNCTION,	"Usupported function" },
+    { CS_UNSUPPORTED_MODE,	"Unsupported mode" },
+    { CS_BAD_SPEED,		"Bad speed" },
+    { CS_BUSY,			"Resource busy" },
+    { CS_GENERAL_FAILURE,	"General failure" },
+    { CS_WRITE_PROTECTED,	"Write protected" },
+    { CS_BAD_ARG_LENGTH,	"Bad argument length" },
+    { CS_BAD_ARGS,		"Bad arguments" },
+    { CS_CONFIGURATION_LOCKED,	"Configuration locked" },
+    { CS_IN_USE,		"Resource in use" },
+    { CS_NO_MORE_ITEMS,		"No more items" },
+    { CS_OUT_OF_RESOURCE,	"Out of resource" },
+    { CS_BAD_HANDLE,		"Bad handle" },
+    { CS_BAD_TUPLE,		"Bad CIS tuple" }
+};
+
+
+static const lookup_t service_table[] = {
+    { AccessConfigurationRegister,	"AccessConfigurationRegister" },
+    { AddSocketServices,		"AddSocketServices" },
+    { AdjustResourceInfo,		"AdjustResourceInfo" },
+    { CheckEraseQueue,			"CheckEraseQueue" },
+    { CloseMemory,			"CloseMemory" },
+    { DeregisterClient,			"DeregisterClient" },
+    { DeregisterEraseQueue,		"DeregisterEraseQueue" },
+    { GetCardServicesInfo,		"GetCardServicesInfo" },
+    { GetClientInfo,			"GetClientInfo" },
+    { GetConfigurationInfo,		"GetConfigurationInfo" },
+    { GetEventMask,			"GetEventMask" },
+    { GetFirstClient,			"GetFirstClient" },
+    { GetFirstRegion,			"GetFirstRegion" },
+    { GetFirstTuple,			"GetFirstTuple" },
+    { GetNextClient,			"GetNextClient" },
+    { GetNextRegion,			"GetNextRegion" },
+    { GetNextTuple,			"GetNextTuple" },
+    { GetStatus,			"GetStatus" },
+    { GetTupleData,			"GetTupleData" },
+    { MapMemPage,			"MapMemPage" },
+    { ModifyConfiguration,		"ModifyConfiguration" },
+    { ModifyWindow,			"ModifyWindow" },
+    { OpenMemory,			"OpenMemory" },
+    { ParseTuple,			"ParseTuple" },
+    { ReadMemory,			"ReadMemory" },
+    { RegisterClient,			"RegisterClient" },
+    { RegisterEraseQueue,		"RegisterEraseQueue" },
+    { RegisterMTD,			"RegisterMTD" },
+    { ReleaseConfiguration,		"ReleaseConfiguration" },
+    { ReleaseIO,			"ReleaseIO" },
+    { ReleaseIRQ,			"ReleaseIRQ" },
+    { ReleaseWindow,			"ReleaseWindow" },
+    { RequestConfiguration,		"RequestConfiguration" },
+    { RequestIO,			"RequestIO" },
+    { RequestIRQ,			"RequestIRQ" },
+    { RequestSocketMask,		"RequestSocketMask" },
+    { RequestWindow,			"RequestWindow" },
+    { ResetCard,			"ResetCard" },
+    { SetEventMask,			"SetEventMask" },
+    { ValidateCIS,			"ValidateCIS" },
+    { WriteMemory,			"WriteMemory" },
+    { BindDevice,			"BindDevice" },
+    { BindMTD,				"BindMTD" },
+    { ReportError,			"ReportError" },
+    { SuspendCard,			"SuspendCard" },
+    { ResumeCard,			"ResumeCard" },
+    { EjectCard,			"EjectCard" },
+    { InsertCard,			"InsertCard" },
+    { ReplaceCIS,			"ReplaceCIS" }
+};
+
+
+int pcmcia_report_error(client_handle_t handle, error_info_t *err)
+{
+	int i;
+	char *serv;
+
+	if (CHECK_HANDLE(handle))
+		printk(KERN_NOTICE);
+	else {
+		struct pcmcia_device *p_dev = handle_to_pdev(handle);
+		printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(service_table); i++)
+		if (service_table[i].key == err->func)
+			break;
+	if (i < ARRAY_SIZE(service_table))
+		serv = service_table[i].msg;
+	else
+		serv = "Unknown service number";
+
+	for (i = 0; i < ARRAY_SIZE(error_table); i++)
+		if (error_table[i].key == err->retcode)
+			break;
+	if (i < ARRAY_SIZE(error_table))
+		printk("%s: %s\n", serv, error_table[i].msg);
+	else
+		printk("%s: Unknown error code %#x\n", serv, err->retcode);
+
+	return CS_SUCCESS;
+} /* report_error */
+EXPORT_SYMBOL(pcmcia_report_error);
+
+/* end of code which was in cs.c before */
+
+/*======================================================================*/
+
+void cs_error(client_handle_t handle, int func, int ret)
+{
+	error_info_t err = { func, ret };
+	pcmcia_report_error(handle, &err);
+}
+EXPORT_SYMBOL(cs_error);
+
+/*======================================================================*/
+
+static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info);
+static struct pcmcia_bus_socket * get_socket_info_by_nr(unsigned int nr);
+
+static void pcmcia_release_bus_socket(struct kref *refcount)
+{
+	struct pcmcia_bus_socket *s = container_of(refcount, struct pcmcia_bus_socket, refcount);
+	pcmcia_put_socket(s->parent);
+	kfree(s);
+}
+
+static void pcmcia_put_bus_socket(struct pcmcia_bus_socket *s)
+{
+	kref_put(&s->refcount, pcmcia_release_bus_socket);
+}
+
+static struct pcmcia_bus_socket *pcmcia_get_bus_socket(struct pcmcia_bus_socket *s)
+{
+	kref_get(&s->refcount);
+	return (s);
+}
+
+/**
+ * pcmcia_register_driver - register a PCMCIA driver with the bus core
+ *
+ * Registers a PCMCIA driver with the PCMCIA bus core.
+ */
+static int pcmcia_device_probe(struct device *dev);
+static int pcmcia_device_remove(struct device * dev);
+
+int pcmcia_register_driver(struct pcmcia_driver *driver)
+{
+	if (!driver)
+		return -EINVAL;
+
+	/* initialize common fields */
+	driver->drv.bus = &pcmcia_bus_type;
+	driver->drv.owner = driver->owner;
+	driver->drv.probe = pcmcia_device_probe;
+	driver->drv.remove = pcmcia_device_remove;
+
+	return driver_register(&driver->drv);
+}
+EXPORT_SYMBOL(pcmcia_register_driver);
+
+/**
+ * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
+ */
+void pcmcia_unregister_driver(struct pcmcia_driver *driver)
+{
+	driver_unregister(&driver->drv);
+}
+EXPORT_SYMBOL(pcmcia_unregister_driver);
+
+#ifdef CONFIG_PROC_FS
+static struct proc_dir_entry *proc_pccard = NULL;
+
+static int proc_read_drivers_callback(struct device_driver *driver, void *d)
+{
+	char **p = d;
+	struct pcmcia_driver *p_drv = container_of(driver,
+						   struct pcmcia_driver, drv);
+
+	*p += sprintf(*p, "%-24.24s 1 %d\n", p_drv->drv.name,
+#ifdef CONFIG_MODULE_UNLOAD
+		      (p_drv->owner) ? module_refcount(p_drv->owner) : 1
+#else
+		      1
+#endif
+	);
+	d = (void *) p;
+
+	return 0;
+}
+
+static int proc_read_drivers(char *buf, char **start, off_t pos,
+			     int count, int *eof, void *data)
+{
+	char *p = buf;
+
+	bus_for_each_drv(&pcmcia_bus_type, NULL, 
+			 (void *) &p, proc_read_drivers_callback);
+
+	return (p - buf);
+}
+#endif
+
+/* pcmcia_device handling */
+
+static struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
+{
+	struct device *tmp_dev;
+	tmp_dev = get_device(&p_dev->dev);
+	if (!tmp_dev)
+		return NULL;
+	return to_pcmcia_dev(tmp_dev);
+}
+
+static void pcmcia_put_dev(struct pcmcia_device *p_dev)
+{
+	if (p_dev)
+		put_device(&p_dev->dev);
+}
+
+static void pcmcia_release_dev(struct device *dev)
+{
+	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+	ds_dbg(1, "releasing dev %p\n", p_dev);
+	pcmcia_put_bus_socket(p_dev->socket->pcmcia);
+	kfree(p_dev);
+}
+
+
+static int pcmcia_device_probe(struct device * dev)
+{
+	struct pcmcia_device *p_dev;
+	struct pcmcia_driver *p_drv;
+	int ret = 0;
+
+	dev = get_device(dev);
+	if (!dev)
+		return -ENODEV;
+
+	p_dev = to_pcmcia_dev(dev);
+	p_drv = to_pcmcia_drv(dev->driver);
+
+	if (!try_module_get(p_drv->owner)) {
+		ret = -EINVAL;
+		goto put_dev;
+	}
+
+	if (p_drv->attach) {
+		p_dev->instance = p_drv->attach();
+		if ((!p_dev->instance) || (p_dev->client.state & CLIENT_UNBOUND)) {
+			printk(KERN_NOTICE "ds: unable to create instance "
+			       "of '%s'!\n", p_drv->drv.name);
+			ret = -EINVAL;
+		}
+	}
+
+	if (ret)
+		module_put(p_drv->owner);
+ put_dev:
+	if ((ret) || !(p_drv->attach))
+		put_device(dev);
+	return (ret);
+}
+
+
+static int pcmcia_device_remove(struct device * dev)
+{
+	struct pcmcia_device *p_dev;
+	struct pcmcia_driver *p_drv;
+
+	/* detach the "instance" */
+	p_dev = to_pcmcia_dev(dev);
+	p_drv = to_pcmcia_drv(dev->driver);
+
+	if (p_drv) {
+		if ((p_drv->detach) && (p_dev->instance)) {
+			p_drv->detach(p_dev->instance);
+			/* from pcmcia_probe_device */
+			put_device(&p_dev->dev);
+		}
+		module_put(p_drv->owner);
+	}
+
+	return 0;
+}
+
+
+
+/*
+ * pcmcia_device_query -- determine information about a pcmcia device
+ */
+static int pcmcia_device_query(struct pcmcia_device *p_dev)
+{
+	cistpl_manfid_t manf_id;
+	cistpl_funcid_t func_id;
+	cistpl_vers_1_t	vers1;
+	unsigned int i;
+
+	if (!pccard_read_tuple(p_dev->socket, p_dev->func,
+			       CISTPL_MANFID, &manf_id)) {
+		p_dev->manf_id = manf_id.manf;
+		p_dev->card_id = manf_id.card;
+		p_dev->has_manf_id = 1;
+		p_dev->has_card_id = 1;
+	}
+
+	if (!pccard_read_tuple(p_dev->socket, p_dev->func,
+			       CISTPL_FUNCID, &func_id)) {
+		p_dev->func_id = func_id.func;
+		p_dev->has_func_id = 1;
+	} else {
+		/* rule of thumb: cards with no FUNCID, but with
+		 * common memory device geometry information, are
+		 * probably memory cards (from pcmcia-cs) */
+		cistpl_device_geo_t devgeo;
+		if (!pccard_read_tuple(p_dev->socket, p_dev->func,
+				      CISTPL_DEVICE_GEO, &devgeo)) {
+			ds_dbg(0, "mem device geometry probably means "
+			       "FUNCID_MEMORY\n");
+			p_dev->func_id = CISTPL_FUNCID_MEMORY;
+			p_dev->has_func_id = 1;
+		}
+	}
+
+	if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
+			       &vers1)) {
+		for (i=0; i < vers1.ns; i++) {
+			char *tmp;
+			unsigned int length;
+
+			tmp = vers1.str + vers1.ofs[i];
+
+			length = strlen(tmp) + 1;
+			if ((length < 3) || (length > 255))
+				continue;
+
+			p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
+						    GFP_KERNEL);
+			if (!p_dev->prod_id[i])
+				continue;
+
+			p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
+						    tmp, length);
+		}
+	}
+
+	return 0;
+}
+
+
+/* device_add_lock is needed to avoid double registration by cardmgr and kernel.
+ * Serializes pcmcia_device_add; will most likely be removed in future.
+ *
+ * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
+ * won't work, this doesn't matter much at the moment: the driver core doesn't
+ * support it either.
+ */
+static DECLARE_MUTEX(device_add_lock);
+
+static struct pcmcia_device * pcmcia_device_add(struct pcmcia_bus_socket *s, unsigned int function)
+{
+	struct pcmcia_device *p_dev;
+	unsigned long flags;
+
+	s = pcmcia_get_bus_socket(s);
+	if (!s)
+		return NULL;
+
+	down(&device_add_lock);
+
+	p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
+	if (!p_dev)
+		goto err_put;
+	memset(p_dev, 0, sizeof(struct pcmcia_device));
+
+	p_dev->socket = s->parent;
+	p_dev->device_no = (s->device_count++);
+	p_dev->func   = function;
+
+	p_dev->dev.bus = &pcmcia_bus_type;
+	p_dev->dev.parent = s->parent->dev.dev;
+	p_dev->dev.release = pcmcia_release_dev;
+	sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
+
+	/* compat */
+	p_dev->client.client_magic = CLIENT_MAGIC;
+	p_dev->client.Socket = s->parent;
+	p_dev->client.Function = function;
+	p_dev->client.state = CLIENT_UNBOUND;
+
+	/* Add to the list in pcmcia_bus_socket */
+	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
+	list_add_tail(&p_dev->socket_device_list, &s->devices_list);
+	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+
+	if (device_register(&p_dev->dev)) {
+		spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
+		list_del(&p_dev->socket_device_list);
+		spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+
+		goto err_free;
+       }
+
+	up(&device_add_lock);
+
+	return p_dev;
+
+ err_free:
+	kfree(p_dev);
+	s->device_count--;
+ err_put:
+	up(&device_add_lock);
+	pcmcia_put_bus_socket(s);
+
+	return NULL;
+}
+
+
+static int pcmcia_card_add(struct pcmcia_socket *s)
+{
+	cisinfo_t cisinfo;
+	cistpl_longlink_mfc_t mfc;
+	unsigned int no_funcs, i;
+	int ret = 0;
+
+	if (!(s->resource_setup_done))
+		return -EAGAIN; /* try again, but later... */
+
+	pcmcia_validate_mem(s);
+	ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
+	if (ret || !cisinfo.Chains) {
+		ds_dbg(0, "invalid CIS or invalid resources\n");
+		return -ENODEV;
+	}
+
+	if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
+		no_funcs = mfc.nfn;
+	else
+		no_funcs = 1;
+
+	/* this doesn't handle multifunction devices on one pcmcia function
+	 * yet. */
+	for (i=0; i < no_funcs; i++)
+		pcmcia_device_add(s->pcmcia, i);
+
+	return (ret);
+}
+
+
+static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
+	struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
+	struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
+
+	/* matching by cardmgr */
+	if (p_dev->cardmgr == p_drv)
+		return 1;
+
+	return 0;
+}
+
+/************************ per-device sysfs output ***************************/
+
+#define pcmcia_device_attr(field, test, format)				\
+static ssize_t field##_show (struct device *dev, char *buf)		\
+{									\
+	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);		\
+	return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
+}
+
+#define pcmcia_device_stringattr(name, field)					\
+static ssize_t name##_show (struct device *dev, char *buf)		\
+{									\
+	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);		\
+	return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
+}
+
+pcmcia_device_attr(func, socket, "0x%02x\n");
+pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
+pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
+pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
+pcmcia_device_stringattr(prod_id1, prod_id[0]);
+pcmcia_device_stringattr(prod_id2, prod_id[1]);
+pcmcia_device_stringattr(prod_id3, prod_id[2]);
+pcmcia_device_stringattr(prod_id4, prod_id[3]);
+
+static struct device_attribute pcmcia_dev_attrs[] = {
+	__ATTR(function, 0444, func_show, NULL),
+	__ATTR_RO(func_id),
+	__ATTR_RO(manf_id),
+	__ATTR_RO(card_id),
+	__ATTR_RO(prod_id1),
+	__ATTR_RO(prod_id2),
+	__ATTR_RO(prod_id3),
+	__ATTR_RO(prod_id4),
+	__ATTR_NULL,
+};
+
+
+/*======================================================================
+
+    These manage a ring buffer of events pending for one user process
+    
+======================================================================*/
+
+static int queue_empty(user_info_t *user)
+{
+    return (user->event_head == user->event_tail);
+}
+
+static event_t get_queued_event(user_info_t *user)
+{
+    user->event_tail = (user->event_tail+1) % MAX_EVENTS;
+    return user->event[user->event_tail];
+}
+
+static void queue_event(user_info_t *user, event_t event)
+{
+    user->event_head = (user->event_head+1) % MAX_EVENTS;
+    if (user->event_head == user->event_tail)
+	user->event_tail = (user->event_tail+1) % MAX_EVENTS;
+    user->event[user->event_head] = event;
+}
+
+static void handle_event(struct pcmcia_bus_socket *s, event_t event)
+{
+    user_info_t *user;
+    for (user = s->user; user; user = user->next)
+	queue_event(user, event);
+    wake_up_interruptible(&s->queue);
+}
+
+
+/*======================================================================
+
+    The card status event handler.
+    
+======================================================================*/
+
+struct send_event_data {
+	struct pcmcia_socket *skt;
+	event_t event;
+	int priority;
+};
+
+static int send_event_callback(struct device *dev, void * _data)
+{
+	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+	struct send_event_data *data = _data;
+
+	/* we get called for all sockets, but may only pass the event
+	 * for drivers _on the affected socket_ */
+	if (p_dev->socket != data->skt)
+		return 0;
+
+	if (p_dev->client.state & (CLIENT_UNBOUND|CLIENT_STALE))
+		return 0;
+
+	if (p_dev->client.EventMask & data->event)
+		return EVENT(&p_dev->client, data->event, data->priority);
+
+	return 0;
+}
+
+static int send_event(struct pcmcia_socket *s, event_t event, int priority)
+{
+	int ret = 0;
+	struct send_event_data private;
+	struct pcmcia_bus_socket *skt = pcmcia_get_bus_socket(s->pcmcia);
+
+	if (!skt)
+		return 0;
+
+	private.skt = s;
+	private.event = event;
+	private.priority = priority;
+
+	ret = bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
+
+	pcmcia_put_bus_socket(skt);
+	return ret;
+} /* send_event */
+
+
+/* Normally, the event is passed to individual drivers after
+ * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
+ * is inversed to maintain historic compatibility.
+ */
+
+static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
+{
+	struct pcmcia_bus_socket *s = skt->pcmcia;
+	int ret = 0;
+
+	ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
+	       event, priority, s);
+    
+	switch (event) {
+
+	case CS_EVENT_CARD_REMOVAL:
+		s->state &= ~DS_SOCKET_PRESENT;
+	    	send_event(skt, event, priority);
+		unbind_request(s);
+		handle_event(s, event);
+		break;
+	
+	case CS_EVENT_CARD_INSERTION:
+		s->state |= DS_SOCKET_PRESENT;
+		pcmcia_card_add(skt);
+		handle_event(s, event);
+		break;
+
+	case CS_EVENT_EJECTION_REQUEST:
+		ret = send_event(skt, event, priority);
+		break;
+
+	default:
+		handle_event(s, event);
+		send_event(skt, event, priority);
+		break;
+    }
+
+    return 0;
+} /* ds_event */
+
+
+/*======================================================================
+
+    bind_request() and bind_device() are merged by now. Register_client()
+    is called right at the end of bind_request(), during the driver's
+    ->attach() call. Individual descriptions:
+
+    bind_request() connects a socket to a particular client driver.
+    It looks up the specified device ID in the list of registered
+    drivers, binds it to the socket, and tries to create an instance
+    of the device.  unbind_request() deletes a driver instance.
+    
+    Bind_device() associates a device driver with a particular socket.
+    It is normally called by Driver Services after it has identified
+    a newly inserted card.  An instance of that driver will then be
+    eligible to register as a client of this socket.
+
+    Register_client() uses the dev_info_t handle to match the
+    caller with a socket.  The driver must have already been bound
+    to a socket with bind_device() -- in fact, bind_device()
+    allocates the client structure that will be used.
+
+======================================================================*/
+
+static int bind_request(struct pcmcia_bus_socket *s, bind_info_t *bind_info)
+{
+	struct pcmcia_driver *p_drv;
+	struct pcmcia_device *p_dev;
+	int ret = 0;
+	unsigned long flags;
+
+	s = pcmcia_get_bus_socket(s);
+	if (!s)
+		return -EINVAL;
+
+	ds_dbg(2, "bind_request(%d, '%s')\n", s->parent->sock,
+	       (char *)bind_info->dev_info);
+
+	p_drv = get_pcmcia_driver(&bind_info->dev_info);
+	if (!p_drv) {
+		ret = -EINVAL;
+		goto err_put;
+	}
+
+	if (!try_module_get(p_drv->owner)) {
+		ret = -EINVAL;
+		goto err_put_driver;
+	}
+
+	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
+        list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
+		if (p_dev->func == bind_info->function) {
+			if ((p_dev->dev.driver == &p_drv->drv)) {
+				if (p_dev->cardmgr) {
+					/* if there's already a device
+					 * registered, and it was registered
+					 * by userspace before, we need to
+					 * return the "instance". */
+					spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+					bind_info->instance = p_dev->instance;
+					ret = -EBUSY;
+					goto err_put_module;
+				} else {
+					/* the correct driver managed to bind
+					 * itself magically to the correct
+					 * device. */
+					spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+					p_dev->cardmgr = p_drv;
+					ret = 0;
+					goto err_put_module;
+				}
+			} else if (!p_dev->dev.driver) {
+				/* there's already a device available where
+				 * no device has been bound to yet. So we don't
+				 * need to register a device! */
+				spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+				goto rescan;
+			}
+		}
+	}
+	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+
+	p_dev = pcmcia_device_add(s, bind_info->function);
+	if (!p_dev) {
+		ret = -EIO;
+		goto err_put_module;
+	}
+
+rescan:
+	p_dev->cardmgr = p_drv;
+
+	pcmcia_device_query(p_dev);
+
+	/*
+	 * Prevent this racing with a card insertion.
+	 */
+	down(&s->parent->skt_sem);
+	bus_rescan_devices(&pcmcia_bus_type);
+	up(&s->parent->skt_sem);
+
+	/* check whether the driver indeed matched. I don't care if this
+	 * is racy or not, because it can only happen on cardmgr access
+	 * paths...
+	 */
+	if (!(p_dev->dev.driver == &p_drv->drv))
+		p_dev->cardmgr = NULL;
+
+ err_put_module:
+	module_put(p_drv->owner);
+ err_put_driver:
+	put_driver(&p_drv->drv);
+ err_put:
+	pcmcia_put_bus_socket(s);
+
+	return (ret);
+} /* bind_request */
+
+
+int pcmcia_register_client(client_handle_t *handle, client_reg_t *req)
+{
+	client_t *client = NULL;
+	struct pcmcia_socket *s;
+	struct pcmcia_bus_socket *skt = NULL;
+	struct pcmcia_device *p_dev = NULL;
+
+	/* Look for unbound client with matching dev_info */
+	down_read(&pcmcia_socket_list_rwsem);
+	list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
+		unsigned long flags;
+
+		if (s->state & SOCKET_CARDBUS)
+			continue;
+
+		skt = s->pcmcia;
+		if (!skt)
+			continue;
+		skt = pcmcia_get_bus_socket(skt);
+		if (!skt)
+			continue;
+		spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
+		list_for_each_entry(p_dev, &skt->devices_list, socket_device_list) {
+			struct pcmcia_driver *p_drv;
+			p_dev = pcmcia_get_dev(p_dev);
+			if (!p_dev)
+				continue;
+			if (!(p_dev->client.state & CLIENT_UNBOUND) ||
+			    (!p_dev->dev.driver)) {
+				pcmcia_put_dev(p_dev);
+				continue;
+			}
+			p_drv = to_pcmcia_drv(p_dev->dev.driver);
+			if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
+				client = &p_dev->client;
+				spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+				goto found;
+			}
+			pcmcia_put_dev(p_dev);
+		}
+		spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+		pcmcia_put_bus_socket(skt);
+	}
+ found:
+	up_read(&pcmcia_socket_list_rwsem);
+	if (!p_dev || !client)
+		return -ENODEV;
+
+	pcmcia_put_bus_socket(skt); /* safe, as we already hold a reference from bind_device */
+
+	*handle = client;
+	client->state &= ~CLIENT_UNBOUND;
+	client->Socket = s;
+	client->EventMask = req->EventMask;
+	client->event_handler = req->event_handler;
+	client->event_callback_args = req->event_callback_args;
+	client->event_callback_args.client_handle = client;
+
+	if (s->state & SOCKET_CARDBUS)
+		client->state |= CLIENT_CARDBUS;
+
+	if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) &&
+	    (client->Function != BIND_FN_ALL)) {
+		cistpl_longlink_mfc_t mfc;
+		if (pccard_read_tuple(s, client->Function, CISTPL_LONGLINK_MFC, &mfc)
+		    == CS_SUCCESS)
+			s->functions = mfc.nfn;
+		else
+			s->functions = 1;
+		s->config = kmalloc(sizeof(config_t) * s->functions,
+				    GFP_KERNEL);
+		if (!s->config)
+			goto out_no_resource;
+		memset(s->config, 0, sizeof(config_t) * s->functions);
+	}
+
+	ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
+	       client, p_dev->dev.bus_id);
+	if (client->EventMask & CS_EVENT_REGISTRATION_COMPLETE)
+		EVENT(client, CS_EVENT_REGISTRATION_COMPLETE, CS_EVENT_PRI_LOW);
+
+	if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
+		if (client->EventMask & CS_EVENT_CARD_INSERTION)
+			EVENT(client, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
+	}
+
+	return CS_SUCCESS;
+
+ out_no_resource:
+	pcmcia_put_dev(p_dev);
+	return CS_OUT_OF_RESOURCE;
+} /* register_client */
+EXPORT_SYMBOL(pcmcia_register_client);
+
+
+/*====================================================================*/
+
+extern struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s);
+
+static int get_device_info(struct pcmcia_bus_socket *s, bind_info_t *bind_info, int first)
+{
+	dev_node_t *node;
+	struct pcmcia_device *p_dev;
+	unsigned long flags;
+	int ret = 0;
+
+#ifdef CONFIG_CARDBUS
+	/*
+	 * Some unbelievably ugly code to associate the PCI cardbus
+	 * device and its driver with the PCMCIA "bind" information.
+	 */
+	{
+		struct pci_bus *bus;
+
+		bus = pcmcia_lookup_bus(s->parent);
+		if (bus) {
+			struct list_head *list;
+			struct pci_dev *dev = NULL;
+
+			list = bus->devices.next;
+			while (list != &bus->devices) {
+				struct pci_dev *pdev = pci_dev_b(list);
+				list = list->next;
+
+				if (first) {
+					dev = pdev;
+					break;
+				}
+
+				/* Try to handle "next" here some way? */
+			}
+			if (dev && dev->driver) {
+				strlcpy(bind_info->name, dev->driver->name, DEV_NAME_LEN);
+				bind_info->major = 0;
+				bind_info->minor = 0;
+				bind_info->next = NULL;
+				return 0;
+			}
+		}
+	}
+#endif
+
+	spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
+	list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
+		if (p_dev->func == bind_info->function) {
+			p_dev = pcmcia_get_dev(p_dev);
+			if (!p_dev)
+				continue;
+			goto found;
+		}
+	}
+	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+	return -ENODEV;
+
+ found:
+	spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+
+	if ((!p_dev->instance) ||
+	    (p_dev->instance->state & DEV_CONFIG_PENDING)) {
+		ret = -EAGAIN;
+		goto err_put;
+	}
+
+	if (first)
+		node = p_dev->instance->dev;
+	else
+		for (node = p_dev->instance->dev; node; node = node->next)
+			if (node == bind_info->next)
+				break;
+	if (!node) {
+		ret = -ENODEV;
+		goto err_put;
+	}
+
+	strlcpy(bind_info->name, node->dev_name, DEV_NAME_LEN);
+	bind_info->major = node->major;
+	bind_info->minor = node->minor;
+	bind_info->next = node->next;
+
+ err_put:
+	pcmcia_put_dev(p_dev);
+	return (ret);
+} /* get_device_info */
+
+/*====================================================================*/
+
+/* unbind _all_ devices attached to a given pcmcia_bus_socket. The
+ * drivers have been called with EVENT_CARD_REMOVAL before.
+ */
+static int unbind_request(struct pcmcia_bus_socket *s)
+{
+	struct pcmcia_device	*p_dev;
+	unsigned long		flags;
+
+	ds_dbg(2, "unbind_request(%d)\n", s->parent->sock);
+
+	s->device_count = 0;
+
+	for (;;) {
+		/* unregister all pcmcia_devices registered with this socket*/
+		spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
+		if (list_empty(&s->devices_list)) {
+			spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+ 			return 0;
+		}
+		p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
+		list_del(&p_dev->socket_device_list);
+		p_dev->client.state |= CLIENT_STALE;
+		spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+
+		device_unregister(&p_dev->dev);
+	}
+
+	return 0;
+} /* unbind_request */
+
+int pcmcia_deregister_client(client_handle_t handle)
+{
+	struct pcmcia_socket *s;
+	int i;
+	struct pcmcia_device *p_dev = handle_to_pdev(handle);
+
+	if (CHECK_HANDLE(handle))
+		return CS_BAD_HANDLE;
+
+	s = SOCKET(handle);
+	ds_dbg(1, "deregister_client(%p)\n", handle);
+
+	if (handle->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
+		goto warn_out;
+	for (i = 0; i < MAX_WIN; i++)
+		if (handle->state & CLIENT_WIN_REQ(i))
+			goto warn_out;
+
+	if (handle->state & CLIENT_STALE) {
+		handle->client_magic = 0;
+		handle->state &= ~CLIENT_STALE;
+		pcmcia_put_dev(p_dev);
+	} else {
+		handle->state = CLIENT_UNBOUND;
+		handle->event_handler = NULL;
+	}
+
+	return CS_SUCCESS;
+ warn_out:
+	printk(KERN_WARNING "ds: deregister_client was called too early.\n");
+	return CS_IN_USE;
+} /* deregister_client */
+EXPORT_SYMBOL(pcmcia_deregister_client);
+
+
+/*======================================================================
+
+    The user-mode PC Card device interface
+
+======================================================================*/
+
+static int ds_open(struct inode *inode, struct file *file)
+{
+    socket_t i = iminor(inode);
+    struct pcmcia_bus_socket *s;
+    user_info_t *user;
+
+    ds_dbg(0, "ds_open(socket %d)\n", i);
+
+    s = get_socket_info_by_nr(i);
+    if (!s)
+	    return -ENODEV;
+    s = pcmcia_get_bus_socket(s);