#include <linux/module.h>
#include <linux/poll.h>
#include <linux/init.h>
-#include <linux/smp_lock.h>
#include <linux/device.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
char name[16];
struct input_handle handle;
wait_queue_head_t wait;
- struct list_head list;
+ struct list_head client_list;
+ struct device dev;
+
struct js_corr corr[ABS_MAX + 1];
struct JS_DATA_SAVE_TYPE glue;
int nabs;
__s16 abs[ABS_MAX + 1];
};
-struct joydev_list {
+struct joydev_client {
struct js_event buffer[JOYDEV_BUFFER_SIZE];
int head;
int tail;
static void joydev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
{
struct joydev *joydev = handle->private;
- struct joydev_list *list;
+ struct joydev_client *client;
struct js_event event;
switch (type) {
event.time = jiffies_to_msecs(jiffies);
- list_for_each_entry(list, &joydev->list, node) {
+ list_for_each_entry(client, &joydev->client_list, node) {
- memcpy(list->buffer + list->head, &event, sizeof(struct js_event));
+ memcpy(client->buffer + client->head, &event, sizeof(struct js_event));
- if (list->startup == joydev->nabs + joydev->nkey)
- if (list->tail == (list->head = (list->head + 1) & (JOYDEV_BUFFER_SIZE - 1)))
- list->startup = 0;
+ if (client->startup == joydev->nabs + joydev->nkey)
+ if (client->tail == (client->head = (client->head + 1) & (JOYDEV_BUFFER_SIZE - 1)))
+ client->startup = 0;
- kill_fasync(&list->fasync, SIGIO, POLL_IN);
+ kill_fasync(&client->fasync, SIGIO, POLL_IN);
}
wake_up_interruptible(&joydev->wait);
static int joydev_fasync(int fd, struct file *file, int on)
{
int retval;
- struct joydev_list *list = file->private_data;
+ struct joydev_client *client = file->private_data;
- retval = fasync_helper(fd, file, on, &list->fasync);
+ retval = fasync_helper(fd, file, on, &client->fasync);
return retval < 0 ? retval : 0;
}
-static void joydev_free(struct joydev *joydev)
+static void joydev_free(struct device *dev)
{
+ struct joydev *joydev = container_of(dev, struct joydev, dev);
+
joydev_table[joydev->minor] = NULL;
kfree(joydev);
}
-static int joydev_release(struct inode * inode, struct file * file)
+static int joydev_release(struct inode *inode, struct file *file)
{
- struct joydev_list *list = file->private_data;
+ struct joydev_client *client = file->private_data;
+ struct joydev *joydev = client->joydev;
joydev_fasync(-1, file, 0);
- list_del(&list->node);
+ list_del(&client->node);
+ kfree(client);
- if (!--list->joydev->open) {
- if (list->joydev->exist)
- input_close_device(&list->joydev->handle);
- else
- joydev_free(list->joydev);
- }
+ if (!--joydev->open && joydev->exist)
+ input_close_device(&joydev->handle);
+
+ put_device(&joydev->dev);
- kfree(list);
return 0;
}
static int joydev_open(struct inode *inode, struct file *file)
{
- struct joydev_list *list;
+ struct joydev_client *client;
+ struct joydev *joydev;
int i = iminor(inode) - JOYDEV_MINOR_BASE;
+ int error;
- if (i >= JOYDEV_MINORS || !joydev_table[i])
+ if (i >= JOYDEV_MINORS)
return -ENODEV;
- if (!(list = kzalloc(sizeof(struct joydev_list), GFP_KERNEL)))
- return -ENOMEM;
+ joydev = joydev_table[i];
+ if (!joydev || !joydev->exist)
+ return -ENODEV;
+
+ get_device(&joydev->dev);
+
+ client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
+ if (!client) {
+ error = -ENOMEM;
+ goto err_put_joydev;
+ }
- list->joydev = joydev_table[i];
- list_add_tail(&list->node, &joydev_table[i]->list);
- file->private_data = list;
+ client->joydev = joydev;
+ list_add_tail(&client->node, &joydev->client_list);
- if (!list->joydev->open++)
- if (list->joydev->exist)
- input_open_device(&list->joydev->handle);
+ if (!joydev->open++ && joydev->exist) {
+ error = input_open_device(&joydev->handle);
+ if (error)
+ goto err_free_client;
+ }
+ file->private_data = client;
return 0;
+
+ err_free_client:
+ list_del(&client->node);
+ kfree(client);
+ err_put_joydev:
+ put_device(&joydev->dev);
+ return error;
}
-static ssize_t joydev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
+static ssize_t joydev_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
{
return -EINVAL;
}
static ssize_t joydev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
- struct joydev_list *list = file->private_data;
- struct joydev *joydev = list->joydev;
+ struct joydev_client *client = file->private_data;
+ struct joydev *joydev = client->joydev;
struct input_dev *input = joydev->handle.dev;
int retval = 0;
- if (!list->joydev->exist)
+ if (!joydev->exist)
return -ENODEV;
if (count < sizeof(struct js_event))
if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
return -EFAULT;
- list->startup = 0;
- list->tail = list->head;
+ client->startup = 0;
+ client->tail = client->head;
return sizeof(struct JS_DATA_TYPE);
}
- if (list->startup == joydev->nabs + joydev->nkey &&
- list->head == list->tail && (file->f_flags & O_NONBLOCK))
+ if (client->startup == joydev->nabs + joydev->nkey &&
+ client->head == client->tail && (file->f_flags & O_NONBLOCK))
return -EAGAIN;
- retval = wait_event_interruptible(list->joydev->wait,
- !list->joydev->exist ||
- list->startup < joydev->nabs + joydev->nkey ||
- list->head != list->tail);
-
+ retval = wait_event_interruptible(joydev->wait,
+ !joydev->exist ||
+ client->startup < joydev->nabs + joydev->nkey ||
+ client->head != client->tail);
if (retval)
return retval;
- if (!list->joydev->exist)
+ if (!joydev->exist)
return -ENODEV;
- while (list->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) {
+ while (client->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) {
struct js_event event;
event.time = jiffies_to_msecs(jiffies);
- if (list->startup < joydev->nkey) {
+ if (client->startup < joydev->nkey) {
event.type = JS_EVENT_BUTTON | JS_EVENT_INIT;
- event.number = list->startup;
+ event.number = client->startup;
event.value = !!test_bit(joydev->keypam[event.number], input->key);
} else {
event.type = JS_EVENT_AXIS | JS_EVENT_INIT;
- event.number = list->startup - joydev->nkey;
+ event.number = client->startup - joydev->nkey;
event.value = joydev->abs[event.number];
}
if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
return -EFAULT;
- list->startup++;
+ client->startup++;
retval += sizeof(struct js_event);
}
- while (list->head != list->tail && retval + sizeof(struct js_event) <= count) {
+ while (client->head != client->tail && retval + sizeof(struct js_event) <= count) {
- if (copy_to_user(buf + retval, list->buffer + list->tail, sizeof(struct js_event)))
+ if (copy_to_user(buf + retval, client->buffer + client->tail, sizeof(struct js_event)))
return -EFAULT;
- list->tail = (list->tail + 1) & (JOYDEV_BUFFER_SIZE - 1);
+ client->tail = (client->tail + 1) & (JOYDEV_BUFFER_SIZE - 1);
retval += sizeof(struct js_event);
}
/* No kernel lock - fine */
static unsigned int joydev_poll(struct file *file, poll_table *wait)
{
- struct joydev_list *list = file->private_data;
+ struct joydev_client *client = file->private_data;
+ struct joydev *joydev = client->joydev;
- poll_wait(file, &list->joydev->wait, wait);
- return ((list->head != list->tail || list->startup < list->joydev->nabs + list->joydev->nkey) ?
- (POLLIN | POLLRDNORM) : 0) | (list->joydev->exist ? 0 : (POLLHUP | POLLERR));
+ poll_wait(file, &joydev->wait, wait);
+ return ((client->head != client->tail || client->startup < joydev->nabs + joydev->nkey) ?
+ (POLLIN | POLLRDNORM) : 0) | (joydev->exist ? 0 : (POLLHUP | POLLERR));
}
static int joydev_ioctl_common(struct joydev *joydev, unsigned int cmd, void __user *argp)
#ifdef CONFIG_COMPAT
static long joydev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- struct joydev_list *list = file->private_data;
- struct joydev *joydev = list->joydev;
+ struct joydev_client *client = file->private_data;
+ struct joydev *joydev = client->joydev;
void __user *argp = (void __user *)arg;
s32 tmp32;
struct JS_DATA_SAVE_TYPE_32 ds32;
static int joydev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
- struct joydev_list *list = file->private_data;
- struct joydev *joydev = list->joydev;
+ struct joydev_client *client = file->private_data;
+ struct joydev *joydev = client->joydev;
void __user *argp = (void __user *)arg;
if (!joydev->exist)
.fasync = joydev_fasync,
};
-static struct input_handle *joydev_connect(struct input_handler *handler, struct input_dev *dev,
- const struct input_device_id *id)
+static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
+ const struct input_device_id *id)
{
struct joydev *joydev;
- struct class_device *cdev;
int i, j, t, minor;
+ int error;
for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
if (minor == JOYDEV_MINORS) {
printk(KERN_ERR "joydev: no more free joydev devices\n");
- return NULL;
+ return -ENFILE;
}
- if (!(joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL)))
- return NULL;
+ joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
+ if (!joydev)
+ return -ENOMEM;
- INIT_LIST_HEAD(&joydev->list);
+ INIT_LIST_HEAD(&joydev->client_list);
init_waitqueue_head(&joydev->wait);
joydev->minor = minor;
joydev->handle.name = joydev->name;
joydev->handle.handler = handler;
joydev->handle.private = joydev;
- sprintf(joydev->name, "js%d", minor);
+ snprintf(joydev->name, sizeof(joydev->name), "js%d", minor);
for (i = 0; i < ABS_MAX + 1; i++)
if (test_bit(i, dev->absbit)) {
joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
}
+ snprintf(joydev->dev.bus_id, sizeof(joydev->dev.bus_id),
+ "js%d", minor);
+ joydev->dev.class = &input_class;
+ joydev->dev.parent = &dev->dev;
+ joydev->dev.devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor);
+ joydev->dev.release = joydev_free;
+ device_initialize(&joydev->dev);
+
joydev_table[minor] = joydev;
- cdev = class_device_create(&input_class, &dev->cdev,
- MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor),
- dev->cdev.dev, joydev->name);
+ error = device_add(&joydev->dev);
+ if (error)
+ goto err_free_joydev;
- /* temporary symlink to keep userspace happy */
- sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
- joydev->name);
+ error = input_register_handle(&joydev->handle);
+ if (error)
+ goto err_delete_joydev;
- return &joydev->handle;
+ return 0;
+
+ err_delete_joydev:
+ device_del(&joydev->dev);
+ err_free_joydev:
+ put_device(&joydev->dev);
+ return error;
}
+
static void joydev_disconnect(struct input_handle *handle)
{
struct joydev *joydev = handle->private;
- struct joydev_list *list;
+ struct joydev_client *client;
+
+ input_unregister_handle(handle);
+ device_del(&joydev->dev);
- sysfs_remove_link(&input_class.subsys.kset.kobj, joydev->name);
- class_device_destroy(&input_class, MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + joydev->minor));
joydev->exist = 0;
if (joydev->open) {
input_close_device(handle);
+ list_for_each_entry(client, &joydev->client_list, node)
+ kill_fasync(&client->fasync, SIGIO, POLL_HUP);
wake_up_interruptible(&joydev->wait);
- list_for_each_entry(list, &joydev->list, node)
- kill_fasync(&list->fasync, SIGIO, POLL_HUP);
- } else
- joydev_free(joydev);
+ }
+
+ put_device(&joydev->dev);
}
static const struct input_device_id joydev_blacklist[] = {
git.samba.org / sfrench / cifs-2.6.git / blobdiff