--- /dev/null
+/*
+ * pcmcia_ioctl.c -- ioctl interface for cardmgr and cardctl
+ *
+ * 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
+ */
+
+/*
+ * This file will go away soon.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/ioctl.h>
+#include <linux/proc_fs.h>
+#include <linux/poll.h>
+#include <linux/pci.h>
+#include <linux/workqueue.h>
+
+#define IN_CARD_SERVICES
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+#include <pcmcia/ss.h>
+
+#include "cs_internal.h"
+#include "ds_internal.h"
+
+static int major_dev = -1;
+
+
+/* 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_socket *socket;
+} user_info_t;
+
+
+#ifdef DEBUG
+extern int ds_pc_debug;
+#define cs_socket_name(skt) ((skt)->dev.class_id)
+
+#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
+
+static struct pcmcia_device *get_pcmcia_device(struct pcmcia_socket *s,
+ unsigned int function)
+{
+ struct pcmcia_device *p_dev = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
+ list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
+ if (p_dev->func == function) {
+ spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+ return pcmcia_get_dev(p_dev);
+ }
+ }
+ spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
+ return NULL;
+}
+
+/* backwards-compatible accessing of driver --- by name! */
+
+static struct pcmcia_driver *get_pcmcia_driver(dev_info_t *dev_info)
+{
+ struct device_driver *drv;
+ struct pcmcia_driver *p_drv;
+
+ drv = driver_find((char *) dev_info, &pcmcia_bus_type);
+ if (!drv)
+ return NULL;
+
+ p_drv = container_of(drv, struct pcmcia_driver, drv);
+
+ return (p_drv);
+}
+
+
+#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
+
+/*======================================================================
+
+ 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;
+}
+
+void handle_event(struct pcmcia_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);
+}
+
+
+/*======================================================================
+
+ 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_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_socket(s);
+ if (!s)
+ return -EINVAL;
+
+ ds_dbg(2, "bind_request(%d, '%s')\n", s->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;
+ 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;
+
+ /* if a driver is already running, we can abort */
+ if (p_dev->dev.driver)
+ goto err_put_module;
+
+ /*
+ * Prevent this racing with a card insertion.
+ */
+ mutex_lock(&s->skt_mutex);
+ bus_rescan_devices(&pcmcia_bus_type);
+ mutex_unlock(&s->skt_mutex);
+
+ /* 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_socket(s);
+
+ return (ret);
+} /* bind_request */
+
+#ifdef CONFIG_CARDBUS
+
+static struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s)
+{
+ if (!s || !(s->state & SOCKET_CARDBUS))
+ return NULL;
+
+ return s->cb_dev->subordinate;
+}
+#endif
+
+static int get_device_info(struct pcmcia_socket *s, bind_info_t *bind_info, int first)
+{
+ dev_node_t *node;
+ struct pcmcia_device *p_dev;
+ struct pcmcia_driver *p_drv;
+ 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);
+ 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);
+
+ p_drv = to_pcmcia_drv(p_dev->dev.driver);
+ if (p_drv && !p_dev->_locked) {
+ ret = -EAGAIN;
+ goto err_put;
+ }
+
+ if (first)
+ node = p_dev->dev_node;
+ else
+ for (node = p_dev->dev_node; 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 */
+
+
+static int ds_open(struct inode *inode, struct file *file)
+{
+ socket_t i = iminor(inode);
+ struct pcmcia_socket *s;
+ user_info_t *user;
+ static int warning_printed = 0;
+
+ ds_dbg(0, "ds_open(socket %d)\n", i);
+
+ s = pcmcia_get_socket_by_nr(i);
+ if (!s)
+ return -ENODEV;
+ s = pcmcia_get_socket(s);
+ if (!s)
+ return -ENODEV;
+
+ if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
+ if (s->pcmcia_state.busy) {
+ pcmcia_put_socket(s);
+ return -EBUSY;
+ }
+ else
+ s->pcmcia_state.busy = 1;
+ }
+
+ user = kmalloc(sizeof(user_info_t), GFP_KERNEL);
+ if (!user) {
+ pcmcia_put_socket(s);
+ return -ENOMEM;
+ }
+ user->event_tail = user->event_head = 0;
+ user->next = s->user;
+ user->user_magic = USER_MAGIC;
+ user->socket = s;
+ s->user = user;
+ file->private_data = user;
+
+ if (!warning_printed) {
+ printk(KERN_INFO "pcmcia: Detected deprecated PCMCIA ioctl "
+ "usage from process: %s.\n", current->comm);
+ printk(KERN_INFO "pcmcia: This interface will soon be removed from "
+ "the kernel; please expect breakage unless you upgrade "
+ "to new tools.\n");
+ printk(KERN_INFO "pcmcia: see http://www.kernel.org/pub/linux/"
+ "utils/kernel/pcmcia/pcmcia.html for details.\n");
+ warning_printed = 1;
+ }
+
+ if (s->pcmcia_state.present)
+ queue_event(user, CS_EVENT_CARD_INSERTION);
+ return 0;
+} /* ds_open */
+
+/*====================================================================*/
+
+static int ds_release(struct inode *inode, struct file *file)
+{
+ struct pcmcia_socket *s;
+ user_info_t *user, **link;
+
+ ds_dbg(0, "ds_release(socket %d)\n", iminor(inode));
+
+ user = file->private_data;
+ if (CHECK_USER(user))
+ goto out;
+
+ s = user->socket;
+
+ /* Unlink user data structure */
+ if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
+ s->pcmcia_state.busy = 0;
+ }
+ file->private_data = NULL;
+ for (link = &s->user; *link; link = &(*link)->next)
+ if (*link == user) break;
+ if (link == NULL)
+ goto out;
+ *link = user->next;
+ user->user_magic = 0;
+ kfree(user);
+ pcmcia_put_socket(s);
+out:
+ return 0;
+} /* ds_release */
+
+/*====================================================================*/
+
+static ssize_t ds_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct pcmcia_socket *s;
+ user_info_t *user;
+ int ret;
+
+ ds_dbg(2, "ds_read(socket %d)\n", iminor(file->f_dentry->d_inode));
+
+ if (count < 4)
+ return -EINVAL;
+
+ user = file->private_data;
+ if (CHECK_USER(user))
+ return -EIO;
+
+ s = user->socket;
+ if (s->pcmcia_state.dead)
+ return -EIO;
+
+ ret = wait_event_interruptible(s->queue, !queue_empty(user));
+ if (ret == 0)
+ ret = put_user(get_queued_event(user), (int __user *)buf) ? -EFAULT : 4;
+
+ return ret;
+} /* ds_read */
+
+/*====================================================================*/
+
+static ssize_t ds_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ ds_dbg(2, "ds_write(socket %d)\n", iminor(file->f_dentry->d_inode));
+
+ if (count != 4)
+ return -EINVAL;
+ if ((file->f_flags & O_ACCMODE) == O_RDONLY)
+ return -EBADF;
+
+ return -EIO;
+} /* ds_write */
+
+/*====================================================================*/
+
+/* No kernel lock - fine */
+static u_int ds_poll(struct file *file, poll_table *wait)
+{
+ struct pcmcia_socket *s;
+ user_info_t *user;
+
+ ds_dbg(2, "ds_poll(socket %d)\n", iminor(file->f_dentry->d_inode));
+
+ user = file->private_data;
+ if (CHECK_USER(user))
+ return POLLERR;
+ s = user->socket;
+ /*
+ * We don't check for a dead socket here since that
+ * will send cardmgr into an endless spin.
+ */
+ poll_wait(file, &s->queue, wait);
+ if (!queue_empty(user))
+ return POLLIN | POLLRDNORM;
+ return 0;
+} /* ds_poll */
+
+/*====================================================================*/
+
+extern int pcmcia_adjust_resource_info(adjust_t *adj);
+
+static int ds_ioctl(struct inode * inode, struct file * file,
+ u_int cmd, u_long arg)
+{
+ struct pcmcia_socket *s;
+ void __user *uarg = (char __user *)arg;
+ u_int size;
+ int ret, err;
+ ds_ioctl_arg_t *buf;
+ user_info_t *user;
+
+ ds_dbg(2, "ds_ioctl(socket %d, %#x, %#lx)\n", iminor(inode), cmd, arg);
+
+ user = file->private_data;
+ if (CHECK_USER(user))
+ return -EIO;
+
+ s = user->socket;
+ if (s->pcmcia_state.dead)
+ return -EIO;
+
+ size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT;
+ if (size > sizeof(ds_ioctl_arg_t)) return -EINVAL;
+
+ /* Permission check */
+ if (!(cmd & IOC_OUT) && !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (cmd & IOC_IN) {
+ if (!access_ok(VERIFY_READ, uarg, size)) {
+ ds_dbg(3, "ds_ioctl(): verify_read = %d\n", -EFAULT);
+ return -EFAULT;
+ }
+ }
+ if (cmd & IOC_OUT) {
+ if (!access_ok(VERIFY_WRITE, uarg, size)) {
+ ds_dbg(3, "ds_ioctl(): verify_write = %d\n", -EFAULT);
+ return -EFAULT;
+ }
+ }
+ buf = kmalloc(sizeof(ds_ioctl_arg_t), GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ err = ret = 0;
+
+ if (cmd & IOC_IN) __copy_from_user((char *)buf, uarg, size);
+
+ switch (cmd) {
+ case DS_ADJUST_RESOURCE_INFO:
+ ret = pcmcia_adjust_resource_info(&buf->adjust);
+ break;
+ case DS_GET_CONFIGURATION_INFO:
+ if (buf->config.Function &&
+ (buf->config.Function >= s->functions))
+ ret = CS_BAD_ARGS;
+ else {
+ struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->config.Function);
+ if (p_dev == NULL)
+ ret = CS_BAD_ARGS;
+ else {
+ ret = pccard_get_configuration_info(s, p_dev, &buf->config);
+ pcmcia_put_dev(p_dev);
+ }
+ }
+ break;
+ case DS_GET_FIRST_TUPLE:
+ mutex_lock(&s->skt_mutex);
+ pcmcia_validate_mem(s);
+ mutex_unlock(&s->skt_mutex);
+ ret = pccard_get_first_tuple(s, BIND_FN_ALL, &buf->tuple);
+ break;
+ case DS_GET_NEXT_TUPLE:
+ ret = pccard_get_next_tuple(s, BIND_FN_ALL, &buf->tuple);
+ break;
+ case DS_GET_TUPLE_DATA:
+ buf->tuple.TupleData = buf->tuple_parse.data;
+ buf->tuple.TupleDataMax = sizeof(buf->tuple_parse.data);
+ ret = pccard_get_tuple_data(s, &buf->tuple);
+ break;
+ case DS_PARSE_TUPLE:
+ buf->tuple.TupleData = buf->tuple_parse.data;
+ ret = pccard_parse_tuple(&buf->tuple, &buf->tuple_parse.parse);
+ break;
+ case DS_RESET_CARD:
+ ret = pccard_reset_card(s);
+ break;
+ case DS_GET_STATUS:
+ if (buf->status.Function &&
+ (buf->status.Function >= s->functions))
+ ret = CS_BAD_ARGS;
+ else {
+ struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->status.Function);
+ if (p_dev == NULL)
+ ret = CS_BAD_ARGS;
+ else {
+ ret = pccard_get_status(s, p_dev, &buf->status);
+ pcmcia_put_dev(p_dev);
+ }
+ }
+ break;
+ case DS_VALIDATE_CIS:
+ mutex_lock(&s->skt_mutex);
+ pcmcia_validate_mem(s);
+ mutex_unlock(&s->skt_mutex);
+ ret = pccard_validate_cis(s, BIND_FN_ALL, &buf->cisinfo);
+ break;
+ case DS_SUSPEND_CARD:
+ ret = pcmcia_suspend_card(s);
+ break;
+ case DS_RESUME_CARD:
+ ret = pcmcia_resume_card(s);
+ break;
+ case DS_EJECT_CARD:
+ err = pcmcia_eject_card(s);
+ break;
+ case DS_INSERT_CARD:
+ err = pcmcia_insert_card(s);
+ break;
+ case DS_ACCESS_CONFIGURATION_REGISTER:
+ if ((buf->conf_reg.Action == CS_WRITE) && !capable(CAP_SYS_ADMIN)) {
+ err = -EPERM;
+ goto free_out;
+ }
+
+ ret = CS_BAD_ARGS;
+
+ if (!(buf->conf_reg.Function &&
+ (buf->conf_reg.Function >= s->functions))) {
+ struct pcmcia_device *p_dev = get_pcmcia_device(s, buf->conf_reg.Function);
+ if (p_dev) {
+ ret = pcmcia_access_configuration_register(p_dev, &buf->conf_reg);
+ pcmcia_put_dev(p_dev);
+ }
+ }
+ break;
+ case DS_GET_FIRST_REGION:
+ case DS_GET_NEXT_REGION:
+ case DS_BIND_MTD:
+ if (!capable(CAP_SYS_ADMIN)) {
+ err = -EPERM;
+ goto free_out;
+ } else {
+ static int printed = 0;
+ if (!printed) {
+ printk(KERN_WARNING "2.6. kernels use pcmciamtd instead of memory_cs.c and do not require special\n");
+ printk(KERN_WARNING "MTD handling any more.\n");
+ printed++;
+ }
+ }
+ err = -EINVAL;
+ goto free_out;
+ break;
+ case DS_GET_FIRST_WINDOW:
+ ret = pcmcia_get_window(s, &buf->win_info.handle, 0,
+ &buf->win_info.window);
+ break;
+ case DS_GET_NEXT_WINDOW:
+ ret = pcmcia_get_window(s, &buf->win_info.handle,
+ buf->win_info.handle->index + 1, &buf->win_info.window);
+ break;
+ case DS_GET_MEM_PAGE:
+ ret = pcmcia_get_mem_page(buf->win_info.handle,
+ &buf->win_info.map);
+ break;
+ case DS_REPLACE_CIS:
+ ret = pcmcia_replace_cis(s, &buf->cisdump);
+ break;
+ case DS_BIND_REQUEST:
+ if (!capable(CAP_SYS_ADMIN)) {
+ err = -EPERM;
+ goto free_out;
+ }
+ err = bind_request(s, &buf->bind_info);
+ break;
+ case DS_GET_DEVICE_INFO:
+ err = get_device_info(s, &buf->bind_info, 1);
+ break;
+ case DS_GET_NEXT_DEVICE:
+ err = get_device_info(s, &buf->bind_info, 0);
+ break;
+ case DS_UNBIND_REQUEST:
+ err = 0;
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ if ((err == 0) && (ret != CS_SUCCESS)) {
+ ds_dbg(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) {
+ if (__copy_to_user(uarg, (char *)buf, size))
+ err = -EFAULT;
+ }
+
+free_out:
+ kfree(buf);
+ return err;
+} /* ds_ioctl */
+
+/*====================================================================*/
+
+static struct file_operations ds_fops = {
+ .owner = THIS_MODULE,
+ .open = ds_open,
+ .release = ds_release,
+ .ioctl = ds_ioctl,
+ .read = ds_read,
+ .write = ds_write,
+ .poll = ds_poll,
+};
+
+void __init pcmcia_setup_ioctl(void) {
+ int i;
+
+ /* Set up character device for user mode clients */
+ i = register_chrdev(0, "pcmcia", &ds_fops);
+ if (i < 0)
+ printk(KERN_NOTICE "unable to find a free device # for "
+ "Driver Services (error=%d)\n", i);
+ else
+ major_dev = i;
+
+#ifdef CONFIG_PROC_FS
+ proc_pccard = proc_mkdir("pccard", proc_bus);
+ if (proc_pccard)
+ create_proc_read_entry("drivers",0,proc_pccard,proc_read_drivers,NULL);
+#endif
+}
+
+
+void __exit pcmcia_cleanup_ioctl(void) {
+#ifdef CONFIG_PROC_FS
+ if (proc_pccard) {
+ remove_proc_entry("drivers", proc_pccard);
+ remove_proc_entry("pccard", proc_bus);
+ }
+#endif
+ if (major_dev != -1)
+ unregister_chrdev(major_dev, "pcmcia");
+}
git://git.onelab.eu / linux-2.6.git / blobdiff