patch-2.3.17 linux/drivers/pcmcia/ds.c

• Lines: 899
• Date: Tue Sep 7 11:03:10 1999
• Orig file: v2.3.16/linux/drivers/pcmcia/ds.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.16/linux/drivers/pcmcia/ds.c linux/drivers/pcmcia/ds.c
@@ -0,0 +1,898 @@
+/*======================================================================
+
+    PC Card Driver Services
+    
+    ds.c 1.96 1999/09/02 18:35:34
+    
+    The contents of this file are subject to the Mozilla Public
+    License Version 1.1 (the "License"); you may not use this file
+    except in compliance with the License. You may obtain a copy of
+    the License at http://www.mozilla.org/MPL/
+
+    Software distributed under the License is distributed on an "AS
+    IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+    implied. See the License for the specific language governing
+    rights and limitations under the License.
+
+    The initial developer of the original code is David A. Hinds
+    <dhinds@hyper.stanford.edu>.  Portions created by David A. Hinds
+    are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
+
+    Alternatively, the contents of this file may be used under the
+    terms of the GNU Public License version 2 (the "GPL"), in which
+    case the provisions of the GPL are applicable instead of the
+    above.  If you wish to allow the use of your version of this file
+    only under the terms of the GPL and not to allow others to use
+    your version of this file under the MPL, indicate your decision
+    by deleting the provisions above and replace them with the notice
+    and other provisions required by the GPL.  If you do not delete
+    the provisions above, a recipient may use your version of this
+    file under either the MPL or the GPL.
+    
+======================================================================*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/malloc.h>
+#include <linux/mm.h>
+#include <linux/fcntl.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/ioctl.h>
+#include <linux/poll.h>
+
+#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>
+
+#ifdef PCMCIA_DEBUG
+int pc_debug = PCMCIA_DEBUG;
+MODULE_PARM(pc_debug, "i");
+#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
+static const char *version =
+"ds.c 1.96 1999/09/02 18:35:34 (David Hinds)";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+typedef struct driver_info_t {
+    dev_info_t		dev_info;
+    int			use_count;
+    dev_link_t		*(*attach)(void);
+    void		(*detach)(dev_link_t *);
+    struct driver_info_t *next;
+} driver_info_t;
+
+typedef struct socket_bind_t {
+    driver_info_t	*driver;
+    dev_link_t		*instance;
+    struct socket_bind_t *next;
+} socket_bind_t;
+
+/* 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;
+} user_info_t;
+
+/* Socket state information */
+typedef struct socket_info_t {
+    client_handle_t	handle;
+    int			state;
+    user_info_t		*user;
+    int			req_pending, req_result;
+    wait_queue_head_t	queue, request;
+    struct timer_list	removal;
+    socket_bind_t	*bind;
+} socket_info_t;
+
+#define SOCKET_PRESENT		0x01
+#define SOCKET_BUSY		0x02
+#define SOCKET_REMOVAL_PENDING	0x10
+
+/*====================================================================*/
+
+/* Device driver ID passed to Card Services */
+static dev_info_t dev_info = "Driver Services";
+
+/* Linked list of all registered device drivers */
+static driver_info_t *root_driver = NULL;
+
+static int sockets = 0, major_dev = -1;
+static socket_info_t *socket_table = NULL;
+
+/*====================================================================*/
+
+static void cs_error(client_handle_t handle, int func, int ret)
+{
+    error_info_t err = { func, ret };
+    CardServices(ReportError, handle, &err);
+}
+
+/*======================================================================
+
+    Register_pccard_driver() and unregister_pccard_driver() are used
+    tell Driver Services that a PC Card client driver is available to
+    be bound to sockets.
+    
+======================================================================*/
+
+int register_pccard_driver(dev_info_t *dev_info,
+			   dev_link_t *(*attach)(void),
+			   void (*detach)(dev_link_t *))
+{
+    driver_info_t *driver;
+    socket_bind_t *b;
+    int i;
+
+    DEBUG(0, "ds: register_pccard_driver('%s')\n", (char *)dev_info);
+    for (driver = root_driver; driver; driver = driver->next)
+	if (strncmp((char *)dev_info, (char *)driver->dev_info,
+		    DEV_NAME_LEN) == 0)
+	    break;
+    if (!driver) {
+	driver = kmalloc(sizeof(driver_info_t), GFP_KERNEL);
+	strncpy(driver->dev_info, (char *)dev_info, DEV_NAME_LEN);
+	driver->use_count = 0;
+	driver->next = root_driver;
+	root_driver = driver;
+    }
+
+    driver->attach = attach;
+    driver->detach = detach;
+    if (driver->use_count == 0) return 0;
+    
+    /* Instantiate any already-bound devices */
+    for (i = 0; i < sockets; i++)
+	for (b = socket_table[i].bind; b; b = b->next) {
+	    if (b->driver != driver) continue;
+	    b->instance = driver->attach();
+	    if (b->instance == NULL)
+		printk(KERN_NOTICE "ds: unable to create instance "
+		       "of '%s'!\n", driver->dev_info);
+	}
+    
+    return 0;
+} /* register_pccard_driver */
+
+/*====================================================================*/
+
+int unregister_pccard_driver(dev_info_t *dev_info)
+{
+    driver_info_t *target, **d = &root_driver;
+    socket_bind_t *b;
+    int i;
+    
+    DEBUG(0, "ds: unregister_pccard_driver('%s')\n",
+	  (char *)dev_info);
+    while ((*d) && (strncmp((*d)->dev_info, (char *)dev_info,
+			    DEV_NAME_LEN) != 0))
+	d = &(*d)->next;
+    if (*d == NULL)
+	return -1;
+    
+    target = *d;
+    if (target->use_count == 0) {
+	*d = target->next;
+	kfree(target);
+    } else {
+	/* Blank out any left-over device instances */
+	target->attach = NULL; target->detach = NULL;
+	for (i = 0; i < sockets; i++)
+	    for (b = socket_table[i].bind; b; b = b->next)
+		if (b->driver == target) b->instance = NULL;
+    }
+    return 0;
+} /* unregister_pccard_driver */
+
+/*======================================================================
+
+    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(socket_info_t *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);
+}
+
+static int handle_request(socket_info_t *s, event_t event)
+{
+    if (s->req_pending != 0)
+	return CS_IN_USE;
+    if (s->state & SOCKET_BUSY)
+	s->req_pending = 1;
+    handle_event(s, event);
+    if (s->req_pending > 0) {
+	interruptible_sleep_on(&s->request);
+	if (signal_pending(current))
+	    return CS_IN_USE;
+	else
+	    return s->req_result;
+    }
+    return CS_SUCCESS;
+}
+
+static void handle_removal(u_long sn)
+{
+    socket_info_t *s = &socket_table[sn];
+    handle_event(s, CS_EVENT_CARD_REMOVAL);
+    s->state &= ~SOCKET_REMOVAL_PENDING;
+}
+
+/*======================================================================
+
+    The card status event handler.
+    
+======================================================================*/
+
+static int ds_event(event_t event, int priority,
+		    event_callback_args_t *args)
+{
+    socket_info_t *s;
+    int i;
+
+    DEBUG(1, "ds: ds_event(0x%06x, %d, 0x%p)\n",
+	  event, priority, args->client_handle);
+    s = args->client_data;
+    i = s - socket_table;
+    
+    switch (event) {
+	
+    case CS_EVENT_CARD_REMOVAL:
+	s->state &= ~SOCKET_PRESENT;
+	if (!(s->state & SOCKET_REMOVAL_PENDING)) {
+	    s->state |= SOCKET_REMOVAL_PENDING;
+	    s->removal.expires = jiffies + HZ/10;
+	    add_timer(&s->removal);
+	}
+	break;
+	
+    case CS_EVENT_CARD_INSERTION:
+	s->state |= SOCKET_PRESENT;
+	handle_event(s, event);
+	break;
+
+    case CS_EVENT_EJECTION_REQUEST:
+	return handle_request(s, event);
+	break;
+	
+    default:
+	handle_event(s, event);
+	break;
+    }
+
+    return 0;
+} /* ds_event */
+
+/*======================================================================
+
+    bind_mtd() connects a memory region with an MTD client.
+    
+======================================================================*/
+
+static int bind_mtd(int i, mtd_info_t *mtd_info)
+{
+    mtd_bind_t bind_req;
+    int ret;
+
+    bind_req.dev_info = &mtd_info->dev_info;
+    bind_req.Attributes = mtd_info->Attributes;
+    bind_req.Socket = i;
+    bind_req.CardOffset = mtd_info->CardOffset;
+    ret = CardServices(BindMTD, &bind_req);
+    if (ret != CS_SUCCESS) {
+	cs_error(NULL, BindMTD, ret);
+	printk(KERN_NOTICE "ds: unable to bind MTD '%s' to socket %d"
+	       " offset 0x%x\n",
+	       (char *)bind_req.dev_info, i, bind_req.CardOffset);
+	return -ENODEV;
+    }
+    return 0;
+} /* bind_mtd */
+
+/*======================================================================
+
+    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.
+    
+======================================================================*/
+
+static int bind_request(int i, bind_info_t *bind_info)
+{
+    struct driver_info_t *driver;
+    socket_bind_t *b;
+    bind_req_t bind_req;
+    socket_info_t *s = &socket_table[i];
+    int ret;
+
+    DEBUG(2, "bind_request(%d, '%s')\n", i,
+	  (char *)bind_info->dev_info);
+    for (driver = root_driver; driver; driver = driver->next)
+	if (strcmp((char *)driver->dev_info,
+		   (char *)bind_info->dev_info) == 0)
+	    break;
+    if (driver == NULL) {
+	driver = kmalloc(sizeof(driver_info_t), GFP_KERNEL);
+	strncpy(driver->dev_info, bind_info->dev_info, DEV_NAME_LEN);
+	driver->use_count = 0;
+	driver->next = root_driver;
+	driver->attach = NULL; driver->detach = NULL;
+	root_driver = driver;
+    }
+
+    for (b = s->bind; b; b = b->next)
+	if (driver == b->driver)
+	    break;
+    if (b != NULL) {
+	bind_info->instance = b->instance;
+	return -EBUSY;
+    }
+
+    bind_req.Socket = i;
+    bind_req.Function = bind_info->function;
+    bind_req.dev_info = &driver->dev_info;
+    ret = CardServices(BindDevice, &bind_req);
+    if (ret != CS_SUCCESS) {
+	cs_error(NULL, BindDevice, ret);
+	printk(KERN_NOTICE "ds: unable to bind '%s' to socket %d\n",
+	       (char *)dev_info, i);
+	return -ENODEV;
+    }
+
+    /* Add binding to list for this socket */
+    driver->use_count++;
+    b = kmalloc(sizeof(socket_bind_t), GFP_KERNEL);
+    b->driver = driver;
+    b->instance = NULL;
+    b->next = s->bind;
+    s->bind = b;
+    
+    if (driver->attach) {
+	b->instance = driver->attach();
+	if (b->instance == NULL) {
+	    printk(KERN_NOTICE "ds: unable to create instance "
+		   "of '%s'!\n", (char *)bind_info->dev_info);
+	    return -ENODEV;
+	}
+    }
+    
+    return 0;
+} /* bind_request */
+
+/*====================================================================*/
+
+static int get_device_info(int i, bind_info_t *bind_info, int first)
+{
+    socket_info_t *s = &socket_table[i];
+    socket_bind_t *b;
+    dev_node_t *node;
+    
+    for (b = s->bind; b; b = b->next)
+	if (strcmp((char *)b->driver->dev_info,
+		   (char *)bind_info->dev_info) == 0)
+	    break;
+    if (b == NULL) return -ENODEV;
+    if ((b->instance == NULL) ||
+	(b->instance->state & DEV_CONFIG_PENDING))
+	return -EAGAIN;
+    if (first)
+	node = b->instance->dev;
+    else
+	for (node = b->instance->dev; node; node = node->next)
+	    if (node == bind_info->next) break;
+    if (node == NULL) return -ENODEV;
+
+    strncpy(bind_info->name, node->dev_name, DEV_NAME_LEN);
+    bind_info->name[DEV_NAME_LEN-1] = '\0';
+    bind_info->major = node->major;
+    bind_info->minor = node->minor;
+    bind_info->next = node->next;
+    
+    return 0;
+} /* get_device_info */
+
+/*====================================================================*/
+
+static int unbind_request(int i, bind_info_t *bind_info)
+{
+    socket_info_t *s = &socket_table[i];
+    socket_bind_t **b, *c;
+
+    DEBUG(2, "unbind_request(%d, '%s')\n", i,
+	  (char *)bind_info->dev_info);
+    for (b = &s->bind; *b; b = &(*b)->next)
+	if (strcmp((char *)(*b)->driver->dev_info,
+		   (char *)bind_info->dev_info) == 0)
+	    break;
+    if (*b == NULL)
+	return -ENODEV;
+    
+    c = *b;
+    c->driver->use_count--;
+    if (c->driver->detach) {
+	if (c->instance)
+	    c->driver->detach(c->instance);
+    } else {
+	if (c->driver->use_count == 0) {
+	    driver_info_t **d;
+	    for (d = &root_driver; *d; d = &((*d)->next))
+		if (c->driver == *d) break;
+	    *d = (*d)->next;
+	    kfree_s(c->driver, sizeof(driver_info_t));
+	}
+    }
+    *b = c->next;
+    kfree_s(c, sizeof(socket_bind_t));
+    
+    return 0;
+} /* unbind_request */
+
+/*======================================================================
+
+    The user-mode PC Card device interface
+
+======================================================================*/
+
+static int ds_open(struct inode *inode, struct file *file)
+{
+    socket_t i = MINOR(inode->i_rdev);
+    socket_info_t *s;
+    user_info_t *user;
+
+    DEBUG(0, "ds_open(socket %d)\n", i);
+    if ((i >= sockets) || (sockets == 0))
+	return -ENODEV;
+    s = &socket_table[i];
+    if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
+	if (s->state & SOCKET_BUSY)
+	    return -EBUSY;
+	else
+	    s->state |= SOCKET_BUSY;
+    }
+    
+    MOD_INC_USE_COUNT;
+    user = kmalloc(sizeof(user_info_t), GFP_KERNEL);
+    user->event_tail = user->event_head = 0;
+    user->next = s->user;
+    user->user_magic = USER_MAGIC;
+    s->user = user;
+    file->private_data = user;
+    
+    if (s->state & SOCKET_PRESENT)
+	queue_event(user, CS_EVENT_CARD_INSERTION);
+    return 0;
+} /* ds_open */
+
+/*====================================================================*/
+
+static int ds_release(struct inode *inode, struct file *file)
+{
+    socket_t i = MINOR(inode->i_rdev);
+    socket_info_t *s;
+    user_info_t *user, **link;
+
+    DEBUG(0, "ds_release(socket %d)\n", i);
+    if ((i >= sockets) || (sockets == 0))
+	return 0;
+    s = &socket_table[i];
+    user = file->private_data;
+    if (CHECK_USER(user))
+	return 0;
+
+    /* Unlink user data structure */
+    if ((file->f_flags & O_ACCMODE) != O_RDONLY)
+	s->state &= ~SOCKET_BUSY;
+    file->private_data = NULL;
+    for (link = &s->user; *link; link = &(*link)->next)
+	if (*link == user) break;
+    if (link == NULL)
+	return 0;
+    *link = user->next;
+    user->user_magic = 0;
+    kfree_s(user, sizeof(user_info_t));
+    
+    MOD_DEC_USE_COUNT;
+    return 0;
+} /* ds_release */
+
+/*====================================================================*/
+
+static ssize_t ds_read(struct file *file, char *buf,
+			      size_t count, loff_t *ppos)
+{
+    socket_t i = MINOR(file->f_dentry->d_inode->i_rdev);
+    socket_info_t *s;
+    user_info_t *user;
+
+    DEBUG(2, "ds_read(socket %d)\n", i);
+    
+    if ((i >= sockets) || (sockets == 0))
+	return -ENODEV;
+    if (count < 4)
+	return -EINVAL;
+    s = &socket_table[i];
+    user = file->private_data;
+    if (CHECK_USER(user))
+	return -EIO;
+    
+    if (queue_empty(user)) {
+	interruptible_sleep_on(&s->queue);
+	if (signal_pending(current))
+	    return -EINTR;
+    }
+    put_user(get_queued_event(user), (int *)buf);
+    return 4;
+} /* ds_read */
+
+/*====================================================================*/
+
+static ssize_t ds_write(struct file *file, const char *buf,
+			       size_t count, loff_t *ppos)
+{
+    socket_t i = MINOR(file->f_dentry->d_inode->i_rdev);
+    socket_info_t *s;
+    user_info_t *user;
+
+    DEBUG(2, "ds_write(socket %d)\n", i);
+    
+    if ((i >= sockets) || (sockets == 0))
+	return -ENODEV;
+    if (count != 4)
+	return -EINVAL;
+    if ((file->f_flags & O_ACCMODE) == O_RDONLY)
+	return -EBADF;
+    s = &socket_table[i];
+    user = file->private_data;
+    if (CHECK_USER(user))
+	return -EIO;
+
+    if (s->req_pending) {
+	s->req_pending--;
+	get_user(s->req_result, (int *)buf);
+	if ((s->req_result != 0) || (s->req_pending == 0))
+	    wake_up_interruptible(&s->request);
+    } else
+	return -EIO;
+
+    return 4;
+} /* ds_write */
+
+/*====================================================================*/
+
+static u_int ds_poll(struct file *file, poll_table *wait)
+{
+    socket_t i = MINOR(file->f_dentry->d_inode->i_rdev);
+    socket_info_t *s;
+    user_info_t *user;
+
+    DEBUG(2, "ds_poll(socket %d)\n", i);
+    
+    if ((i >= sockets) || (sockets == 0))
+	return POLLERR;
+    s = &socket_table[i];
+    user = file->private_data;
+    if (CHECK_USER(user))
+	return POLLERR;
+    poll_wait(file, &s->queue, wait);
+    if (!queue_empty(user))
+	return POLLIN | POLLRDNORM;
+    return 0;
+} /* ds_poll */
+
+/*====================================================================*/
+
+static int ds_ioctl(struct inode * inode, struct file * file,
+		    u_int cmd, u_long arg)
+{
+    socket_t i = MINOR(inode->i_rdev);
+    socket_info_t *s;
+    u_int size;
+    int ret, err;
+    ds_ioctl_arg_t buf;
+
+    DEBUG(2, "ds_ioctl(socket %d, %#x, %#lx)\n", i, cmd, arg);
+    
+    if ((i >= sockets) || (sockets == 0))
+	return -ENODEV;
+    s = &socket_table[i];
+    
+    size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT;
+    if (size > sizeof(ds_ioctl_arg_t)) return -EINVAL;
+
+    /* Permission check */
+    if (!(cmd & IOC_OUT) && !suser())
+	return -EPERM;
+	
+    if (cmd & IOC_IN) {
+	err = verify_area(VERIFY_READ, (char *)arg, size);
+	if (err) {
+	    DEBUG(3, "ds_ioctl(): verify_read = %d\n", err);
+	    return err;
+	}
+    }
+    if (cmd & IOC_OUT) {
+	err = verify_area(VERIFY_WRITE, (char *)arg, size);
+	if (err) {
+	    DEBUG(3, "ds_ioctl(): verify_write = %d\n", err);
+	    return err;
+	}
+    }
+    
+    err = ret = 0;
+    
+    if (cmd & IOC_IN) copy_from_user((char *)&buf, (char *)arg, size);
+    
+    switch (cmd) {
+    case DS_ADJUST_RESOURCE_INFO:
+	ret = CardServices(AdjustResourceInfo, s->handle, &buf.adjust);
+	break;
+    case DS_GET_CARD_SERVICES_INFO:
+	ret = CardServices(GetCardServicesInfo, &buf.servinfo);
+	break;
+    case DS_GET_CONFIGURATION_INFO:
+	ret = CardServices(GetConfigurationInfo, s->handle, &buf.config);
+	break;
+    case DS_GET_FIRST_TUPLE:
+	ret = CardServices(GetFirstTuple, s->handle, &buf.tuple);
+	break;
+    case DS_GET_NEXT_TUPLE:
+	ret = CardServices(GetNextTuple, s->handle, &buf.tuple);
+	break;
+    case DS_GET_TUPLE_DATA:
+	buf.tuple.TupleData = buf.tuple_parse.data;
+	buf.tuple.TupleDataMax = sizeof(buf.tuple_parse.data);
+	ret = CardServices(GetTupleData, s->handle, &buf.tuple);
+	break;
+    case DS_PARSE_TUPLE:
+	buf.tuple.TupleData = buf.tuple_parse.data;
+	ret = CardServices(ParseTuple, s->handle, &buf.tuple,
+			   &buf.tuple_parse.parse);
+	break;
+    case DS_RESET_CARD:
+	ret = CardServices(ResetCard, s->handle, NULL);
+	break;
+    case DS_GET_STATUS:
+	ret = CardServices(GetStatus, s->handle, &buf.status);
+	break;
+    case DS_VALIDATE_CIS:
+	ret = CardServices(ValidateCIS, s->handle, &buf.cisinfo);
+	break;
+    case DS_SUSPEND_CARD:
+	ret = CardServices(SuspendCard, s->handle, NULL);
+	break;
+    case DS_RESUME_CARD:
+	ret = CardServices(ResumeCard, s->handle, NULL);
+	break;
+    case DS_EJECT_CARD:
+	ret = CardServices(EjectCard, s->handle, NULL);
+	break;
+    case DS_INSERT_CARD:
+	ret = CardServices(InsertCard, s->handle, NULL);
+	break;
+    case DS_ACCESS_CONFIGURATION_REGISTER:
+	if ((buf.conf_reg.Action == CS_WRITE) && !suser())
+	    return -EPERM;
+	ret = CardServices(AccessConfigurationRegister, s->handle,
+			   &buf.conf_reg);
+	break;
+    case DS_GET_FIRST_REGION:
+        ret = CardServices(GetFirstRegion, s->handle, &buf.region);
+	break;
+    case DS_GET_NEXT_REGION:
+	ret = CardServices(GetNextRegion, s->handle, &buf.region);
+	break;
+    case DS_GET_FIRST_WINDOW:
+	buf.win_info.handle = (window_handle_t)s->handle;
+	ret = CardServices(GetFirstWindow, &buf.win_info.handle,
+			   &buf.win_info.window);
+	break;
+    case DS_GET_NEXT_WINDOW:
+	ret = CardServices(GetNextWindow, &buf.win_info.handle,
+			   &buf.win_info.window);
+	break;
+    case DS_GET_MEM_PAGE:
+	ret = CardServices(GetMemPage, buf.win_info.handle,
+			   &buf.win_info.map);
+	break;
+    case DS_REPLACE_CIS:
+	ret = CardServices(ReplaceCIS, s->handle, &buf.cisdump);
+	break;
+    case DS_BIND_REQUEST:
+	if (!suser()) return -EPERM;
+	err = bind_request(i, &buf.bind_info);
+	break;
+    case DS_GET_DEVICE_INFO:
+	err = get_device_info(i, &buf.bind_info, 1);
+	break;
+    case DS_GET_NEXT_DEVICE:
+	err = get_device_info(i, &buf.bind_info, 0);
+	break;
+    case DS_UNBIND_REQUEST:
+	err = unbind_request(i, &buf.bind_info);
+	break;
+    case DS_BIND_MTD:
+	if (!suser()) return -EPERM;
+	err = bind_mtd(i, &buf.mtd_info);
+	break;
+    default:
+	err = -EINVAL;
+    }
+    
+    if ((err == 0) && (ret != CS_SUCCESS)) {
+	DEBUG(2, "ds_ioctl: ret = %d\n", ret);
+	switch (ret) {
+	case CS_BAD_SOCKET: case CS_NO_CARD:
+	    err = -ENODEV; break;
+	case CS_BAD_ARGS: case CS_BAD_ATTRIBUTE: case CS_BAD_IRQ:
+	case CS_BAD_TUPLE:
+	    err = -EINVAL; break;
+	case CS_IN_USE:
+	    err = -EBUSY; break;
+	case CS_OUT_OF_RESOURCE:
+	    err = -ENOSPC; break;
+	case CS_NO_MORE_ITEMS:
+	    err = -ENODATA; break;
+	case CS_UNSUPPORTED_FUNCTION:
+	    err = -ENOSYS; break;
+	default:
+	    err = -EIO; break;
+	}
+    }
+    
+    if (cmd & IOC_OUT) copy_to_user((char *)arg, (char *)&buf, size);
+     
+    return err;
+} /* ds_ioctl */
+
+/*====================================================================*/
+
+static struct file_operations ds_fops = {
+    NULL,		/* lseek */
+    ds_read,		/* read */
+    ds_write,		/* write */
+    NULL,		/* readdir */
+    ds_poll,		/* poll */
+    ds_ioctl,		/* ioctl */
+    NULL,		/* mmap */
+    ds_open,		/* open */
+    NULL,		/* flush */
+    ds_release,		/* release */
+    NULL		/* fsync */
+};
+
+EXPORT_SYMBOL(register_pccard_driver);
+EXPORT_SYMBOL(unregister_pccard_driver);
+
+/*====================================================================*/
+
+int pcmcia_ds_init(void)
+{
+    client_reg_t client_reg;
+    servinfo_t serv;
+    bind_req_t bind;
+    socket_info_t *s;
+    int i, ret;
+    
+    DEBUG(0, "%s\n", version);
+    
+    CardServices(GetCardServicesInfo, &serv);
+    if (serv.Revision != CS_RELEASE_CODE) {
+	printk(KERN_NOTICE "ds: Card Services release does not match!\n");
+	return -1;
+    }
+    if (serv.Count == 0) {
+	printk(KERN_NOTICE "ds: no socket drivers loaded!\n");
+	return -1;
+    }
+    
+    sockets = serv.Count;
+    socket_table = kmalloc(sockets*sizeof(socket_info_t), GFP_KERNEL);
+    for (i = 0, s = socket_table; i < sockets; i++, s++) {
+	s->state = 0;
+	s->user = NULL;
+	s->req_pending = 0;
+	init_waitqueue_head(&s->queue);
+	init_waitqueue_head(&s->request);
+	s->handle = NULL;
+	s->removal.prev = s->removal.next = NULL;
+	s->removal.data = i;
+	s->removal.function = &handle_removal;
+	s->bind = NULL;
+    }
+    
+    /* Set up hotline to Card Services */
+    client_reg.dev_info = bind.dev_info = &dev_info;
+    client_reg.Attributes = INFO_MASTER_CLIENT;
+    client_reg.EventMask =
+	CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
+	CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
+	CS_EVENT_EJECTION_REQUEST | CS_EVENT_INSERTION_REQUEST |
+        CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
+    client_reg.event_handler = &ds_event;
+    client_reg.Version = 0x0210;
+    for (i = 0; i < sockets; i++) {
+	bind.Socket = i;
+	bind.Function = BIND_FN_ALL;
+	ret = CardServices(BindDevice, &bind);
+	if (ret != CS_SUCCESS) {
+	    cs_error(NULL, BindDevice, ret);
+	    break;
+	}
+	client_reg.event_callback_args.client_data = &socket_table[i];
+	ret = CardServices(RegisterClient, &socket_table[i].handle,
+			   &client_reg);
+	if (ret != CS_SUCCESS) {
+	    cs_error(NULL, RegisterClient, ret);
+	    break;
+	}
+    }
+    
+    /* Set up character device for user mode clients */
+    i = register_chrdev(0, "pcmcia", &ds_fops);
+    if (i == -EBUSY)
+	printk(KERN_NOTICE "unable to find a free device # for "
+	       "Driver Services\n");
+    else
+	major_dev = i;
+    
+    return 0;
+}
+
+#ifdef MODULE
+
+static int init_module(void)
+{
+	return pcmcia_ds_init();
+}
+
+void cleanup_module(void)
+{
+    int i;
+    if (major_dev != -1)
+	unregister_chrdev(major_dev, "pcmcia");
+    for (i = 0; i < sockets; i++)
+	CardServices(DeregisterClient, socket_table[i].handle);
+    sockets = 0;
+    kfree(socket_table);
+}
+
+#endif