int minor;
char name[8];
wait_queue_head_t wait;
- struct list_head list;
+ struct list_head client_list;
struct input_handle handle;
int x, y, pressure;
struct ts_calibration cal;
};
-struct tsdev_list {
+struct tsdev_client {
struct fasync_struct *fasync;
struct list_head node;
struct tsdev *tsdev;
static int tsdev_fasync(int fd, struct file *file, int on)
{
- struct tsdev_list *list = file->private_data;
+ struct tsdev_client *client = file->private_data;
int retval;
- retval = fasync_helper(fd, file, on, &list->fasync);
+ retval = fasync_helper(fd, file, on, &client->fasync);
return retval < 0 ? retval : 0;
}
static int tsdev_open(struct inode *inode, struct file *file)
{
int i = iminor(inode) - TSDEV_MINOR_BASE;
- struct tsdev_list *list;
+ struct tsdev_client *client;
+ struct tsdev *tsdev;
+ int error;
+
+ printk(KERN_WARNING "tsdev (compaq touchscreen emulation) is scheduled "
+ "for removal.\nSee Documentation/feature-removal-schedule.txt "
+ "for details.\n");
- if (i >= TSDEV_MINORS || !tsdev_table[i & TSDEV_MINOR_MASK])
+ if (i >= TSDEV_MINORS)
return -ENODEV;
- if (!(list = kzalloc(sizeof(struct tsdev_list), GFP_KERNEL)))
+ tsdev = tsdev_table[i & TSDEV_MINOR_MASK];
+ if (!tsdev || !tsdev->exist)
+ return -ENODEV;
+
+ client = kzalloc(sizeof(struct tsdev_client), GFP_KERNEL);
+ if (!client)
return -ENOMEM;
- list->raw = (i >= TSDEV_MINORS/2) ? 1 : 0;
+ client->tsdev = tsdev;
+ client->raw = (i >= TSDEV_MINORS / 2) ? 1 : 0;
+ list_add_tail(&client->node, &tsdev->client_list);
- i &= TSDEV_MINOR_MASK;
- list->tsdev = tsdev_table[i];
- list_add_tail(&list->node, &tsdev_table[i]->list);
- file->private_data = list;
+ if (!tsdev->open++ && tsdev->exist) {
+ error = input_open_device(&tsdev->handle);
+ if (error) {
+ list_del(&client->node);
+ kfree(client);
+ return error;
+ }
+ }
- if (!list->tsdev->open++)
- if (list->tsdev->exist)
- input_open_device(&list->tsdev->handle);
+ file->private_data = client;
return 0;
}
static int tsdev_release(struct inode *inode, struct file *file)
{
- struct tsdev_list *list = file->private_data;
+ struct tsdev_client *client = file->private_data;
+ struct tsdev *tsdev = client->tsdev;
tsdev_fasync(-1, file, 0);
- list_del(&list->node);
- if (!--list->tsdev->open) {
- if (list->tsdev->exist)
- input_close_device(&list->tsdev->handle);
+ list_del(&client->node);
+ kfree(client);
+
+ if (!--tsdev->open) {
+ if (tsdev->exist)
+ input_close_device(&tsdev->handle);
else
- tsdev_free(list->tsdev);
+ tsdev_free(tsdev);
}
- kfree(list);
+
return 0;
}
static ssize_t tsdev_read(struct file *file, char __user *buffer, size_t count,
- loff_t * ppos)
+ loff_t *ppos)
{
- struct tsdev_list *list = file->private_data;
+ struct tsdev_client *client = file->private_data;
+ struct tsdev *tsdev = client->tsdev;
int retval = 0;
- if (list->head == list->tail && list->tsdev->exist && (file->f_flags & O_NONBLOCK))
+ if (client->head == client->tail && tsdev->exist && (file->f_flags & O_NONBLOCK))
return -EAGAIN;
- retval = wait_event_interruptible(list->tsdev->wait,
- list->head != list->tail || !list->tsdev->exist);
-
+ retval = wait_event_interruptible(tsdev->wait,
+ client->head != client->tail || !tsdev->exist);
if (retval)
return retval;
- if (!list->tsdev->exist)
+ if (!tsdev->exist)
return -ENODEV;
- while (list->head != list->tail &&
+ while (client->head != client->tail &&
retval + sizeof (struct ts_event) <= count) {
- if (copy_to_user (buffer + retval, list->event + list->tail,
+ if (copy_to_user (buffer + retval, client->event + client->tail,
sizeof (struct ts_event)))
return -EFAULT;
- list->tail = (list->tail + 1) & (TSDEV_BUFFER_SIZE - 1);
+ client->tail = (client->tail + 1) & (TSDEV_BUFFER_SIZE - 1);
retval += sizeof (struct ts_event);
}
}
/* No kernel lock - fine */
-static unsigned int tsdev_poll(struct file *file, poll_table * wait)
+static unsigned int tsdev_poll(struct file *file, poll_table *wait)
{
- struct tsdev_list *list = file->private_data;
+ struct tsdev_client *client = file->private_data;
+ struct tsdev *tsdev = client->tsdev;
- poll_wait(file, &list->tsdev->wait, wait);
- return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
- (list->tsdev->exist ? 0 : (POLLHUP | POLLERR));
+ poll_wait(file, &tsdev->wait, wait);
+ return ((client->head == client->tail) ? 0 : (POLLIN | POLLRDNORM)) |
+ (tsdev->exist ? 0 : (POLLHUP | POLLERR));
}
static int tsdev_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
- struct tsdev_list *list = file->private_data;
- struct tsdev *tsdev = list->tsdev;
+ struct tsdev_client *client = file->private_data;
+ struct tsdev *tsdev = client->tsdev;
int retval = 0;
switch (cmd) {
case TS_GET_CAL:
- if (copy_to_user ((void __user *)arg, &tsdev->cal,
- sizeof (struct ts_calibration)))
+ if (copy_to_user((void __user *)arg, &tsdev->cal,
+ sizeof (struct ts_calibration)))
retval = -EFAULT;
break;
case TS_SET_CAL:
- if (copy_from_user (&tsdev->cal, (void __user *)arg,
- sizeof (struct ts_calibration)))
+ if (copy_from_user(&tsdev->cal, (void __user *)arg,
+ sizeof (struct ts_calibration)))
retval = -EFAULT;
break;
unsigned int code, int value)
{
struct tsdev *tsdev = handle->private;
- struct tsdev_list *list;
+ struct tsdev_client *client;
struct timeval time;
switch (type) {
if (type != EV_SYN || code != SYN_REPORT)
return;
- list_for_each_entry(list, &tsdev->list, node) {
+ list_for_each_entry(client, &tsdev->client_list, node) {
int x, y, tmp;
do_gettimeofday(&time);
- list->event[list->head].millisecs = time.tv_usec / 100;
- list->event[list->head].pressure = tsdev->pressure;
+ client->event[client->head].millisecs = time.tv_usec / 100;
+ client->event[client->head].pressure = tsdev->pressure;
x = tsdev->x;
y = tsdev->y;
/* Calibration */
- if (!list->raw) {
+ if (!client->raw) {
x = ((x * tsdev->cal.xscale) >> 8) + tsdev->cal.xtrans;
y = ((y * tsdev->cal.yscale) >> 8) + tsdev->cal.ytrans;
if (tsdev->cal.xyswap) {
}
}
- list->event[list->head].x = x;
- list->event[list->head].y = y;
- list->head = (list->head + 1) & (TSDEV_BUFFER_SIZE - 1);
- kill_fasync(&list->fasync, SIGIO, POLL_IN);
+ client->event[client->head].x = x;
+ client->event[client->head].y = y;
+ client->head = (client->head + 1) & (TSDEV_BUFFER_SIZE - 1);
+ kill_fasync(&client->fasync, SIGIO, POLL_IN);
}
wake_up_interruptible(&tsdev->wait);
}
-static struct input_handle *tsdev_connect(struct input_handler *handler,
- struct input_dev *dev,
- const struct input_device_id *id)
+static int tsdev_connect(struct input_handler *handler, struct input_dev *dev,
+ const struct input_device_id *id)
{
struct tsdev *tsdev;
struct class_device *cdev;
+ dev_t devt;
int minor, delta;
+ int error;
for (minor = 0; minor < TSDEV_MINORS / 2 && tsdev_table[minor]; minor++);
if (minor >= TSDEV_MINORS / 2) {
printk(KERN_ERR
"tsdev: You have way too many touchscreens\n");
- return NULL;
+ return -ENFILE;
}
- if (!(tsdev = kzalloc(sizeof(struct tsdev), GFP_KERNEL)))
- return NULL;
+ tsdev = kzalloc(sizeof(struct tsdev), GFP_KERNEL);
+ if (!tsdev)
+ return -ENOMEM;
- INIT_LIST_HEAD(&tsdev->list);
+ INIT_LIST_HEAD(&tsdev->client_list);
init_waitqueue_head(&tsdev->wait);
sprintf(tsdev->name, "ts%d", minor);
tsdev_table[minor] = tsdev;
- cdev = class_device_create(&input_class, &dev->cdev,
- MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor),
- dev->cdev.dev, tsdev->name);
+ devt = MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor),
+
+ cdev = class_device_create(&input_class, &dev->cdev, devt,
+ dev->cdev.dev, tsdev->name);
+ if (IS_ERR(cdev)) {
+ error = PTR_ERR(cdev);
+ goto err_free_tsdev;
+ }
/* temporary symlink to keep userspace happy */
- sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
- tsdev->name);
+ error = sysfs_create_link(&input_class.subsys.kobj,
+ &cdev->kobj, tsdev->name);
+ if (error)
+ goto err_cdev_destroy;
+
+ error = input_register_handle(&tsdev->handle);
+ if (error)
+ goto err_remove_link;
- return &tsdev->handle;
+ return 0;
+
+ err_remove_link:
+ sysfs_remove_link(&input_class.subsys.kobj, tsdev->name);
+ err_cdev_destroy:
+ class_device_destroy(&input_class, devt);
+ err_free_tsdev:
+ tsdev_table[minor] = NULL;
+ kfree(tsdev);
+ return error;
}
static void tsdev_disconnect(struct input_handle *handle)
{
struct tsdev *tsdev = handle->private;
- struct tsdev_list *list;
+ struct tsdev_client *client;
+
+ input_unregister_handle(handle);
- sysfs_remove_link(&input_class.subsys.kset.kobj, tsdev->name);
+ sysfs_remove_link(&input_class.subsys.kobj, tsdev->name);
class_device_destroy(&input_class,
MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + tsdev->minor));
tsdev->exist = 0;
if (tsdev->open) {
input_close_device(handle);
wake_up_interruptible(&tsdev->wait);
- list_for_each_entry(list, &tsdev->list, node)
- kill_fasync(&list->fasync, SIGIO, POLL_HUP);
+ list_for_each_entry(client, &tsdev->client_list, node)
+ kill_fasync(&client->fasync, SIGIO, POLL_HUP);
} else
tsdev_free(tsdev);
}
projects / linux-drm-fsl-dcu.git / blobdiff