* Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
*
* Changes/Revisions:
+ * 0.3 09/04/2006 (Anssi Hannula <anssi.hannula@gmail.com>)
+ * - updated ff support for the changes in kernel interface
+ * - added MODULE_VERSION
+ * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>)
+ * - added force feedback support
+ * - added UI_SET_PHYS
* 0.1 20/06/2002
* - first public version
*/
#include <linux/miscdevice.h>
#include <linux/uinput.h>
-static int uinput_dev_open(struct input_dev *dev)
-{
- return 0;
-}
-
-static void uinput_dev_close(struct input_dev *dev)
-{
-
-}
-
static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
struct uinput_device *udev;
- udev = (struct uinput_device *)dev->private;
+ udev = dev->private;
udev->buff[udev->head].type = type;
udev->buff[udev->head].code = code;
return 0;
}
-static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect)
+static int uinput_request_alloc_id(struct uinput_device *udev, struct uinput_request *request)
{
- return 0;
+ /* Atomically allocate an ID for the given request. Returns 0 on success. */
+ int id;
+ int err = -1;
+
+ spin_lock(&udev->requests_lock);
+
+ for (id = 0; id < UINPUT_NUM_REQUESTS; id++)
+ if (!udev->requests[id]) {
+ request->id = id;
+ udev->requests[id] = request;
+ err = 0;
+ break;
+ }
+
+ spin_unlock(&udev->requests_lock);
+ return err;
}
-static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id)
+static struct uinput_request* uinput_request_find(struct uinput_device *udev, int id)
{
- return 0;
+ /* Find an input request, by ID. Returns NULL if the ID isn't valid. */
+ if (id >= UINPUT_NUM_REQUESTS || id < 0)
+ return NULL;
+ return udev->requests[id];
}
-static int uinput_create_device(struct uinput_device *udev)
+static inline int uinput_request_reserve_slot(struct uinput_device *udev, struct uinput_request *request)
{
- if (!udev->dev->name) {
- printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME);
- return -EINVAL;
- }
+ /* Allocate slot. If none are available right away, wait. */
+ return wait_event_interruptible(udev->requests_waitq,
+ !uinput_request_alloc_id(udev, request));
+}
- udev->dev->open = uinput_dev_open;
- udev->dev->close = uinput_dev_close;
- udev->dev->event = uinput_dev_event;
- udev->dev->upload_effect = uinput_dev_upload_effect;
- udev->dev->erase_effect = uinput_dev_erase_effect;
- udev->dev->private = udev;
+static void uinput_request_done(struct uinput_device *udev, struct uinput_request *request)
+{
+ /* Mark slot as available */
+ udev->requests[request->id] = NULL;
+ wake_up(&udev->requests_waitq);
- init_waitqueue_head(&(udev->waitq));
+ complete(&request->done);
+}
- input_register_device(udev->dev);
+static int uinput_request_submit(struct input_dev *dev, struct uinput_request *request)
+{
+ /* Tell our userspace app about this new request by queueing an input event */
+ uinput_dev_event(dev, EV_UINPUT, request->code, request->id);
- set_bit(UIST_CREATED, &(udev->state));
+ /* Wait for the request to complete */
+ wait_for_completion(&request->done);
+ return request->retval;
+}
- return 0;
+static void uinput_dev_set_gain(struct input_dev *dev, u16 gain)
+{
+ uinput_dev_event(dev, EV_FF, FF_GAIN, gain);
+}
+
+static void uinput_dev_set_autocenter(struct input_dev *dev, u16 magnitude)
+{
+ uinput_dev_event(dev, EV_FF, FF_AUTOCENTER, magnitude);
}
-static int uinput_destroy_device(struct uinput_device *udev)
+static int uinput_dev_playback(struct input_dev *dev, int effect_id, int value)
{
- if (!test_bit(UIST_CREATED, &(udev->state))) {
- printk(KERN_WARNING "%s: create the device first\n", UINPUT_NAME);
+ return uinput_dev_event(dev, EV_FF, effect_id, value);
+}
+
+static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
+{
+ struct uinput_request request;
+ int retval;
+
+ request.id = -1;
+ init_completion(&request.done);
+ request.code = UI_FF_UPLOAD;
+ request.u.upload.effect = effect;
+ request.u.upload.old = old;
+
+ retval = uinput_request_reserve_slot(dev->private, &request);
+ if (!retval)
+ retval = uinput_request_submit(dev, &request);
+
+ return retval;
+}
+
+static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id)
+{
+ struct uinput_request request;
+ int retval;
+
+ if (!test_bit(EV_FF, dev->evbit))
+ return -ENOSYS;
+
+ request.id = -1;
+ init_completion(&request.done);
+ request.code = UI_FF_ERASE;
+ request.u.effect_id = effect_id;
+
+ retval = uinput_request_reserve_slot(dev->private, &request);
+ if (!retval)
+ retval = uinput_request_submit(dev, &request);
+
+ return retval;
+}
+
+static void uinput_destroy_device(struct uinput_device *udev)
+{
+ const char *name, *phys;
+
+ if (udev->dev) {
+ name = udev->dev->name;
+ phys = udev->dev->phys;
+ if (udev->state == UIST_CREATED)
+ input_unregister_device(udev->dev);
+ else
+ input_free_device(udev->dev);
+ kfree(name);
+ kfree(phys);
+ udev->dev = NULL;
+ }
+
+ udev->state = UIST_NEW_DEVICE;
+}
+
+static int uinput_create_device(struct uinput_device *udev)
+{
+ struct input_dev *dev = udev->dev;
+ int error;
+
+ if (udev->state != UIST_SETUP_COMPLETE) {
+ printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME);
return -EINVAL;
}
- input_unregister_device(udev->dev);
+ if (udev->ff_effects_max) {
+ error = input_ff_create(dev, udev->ff_effects_max);
+ if (error)
+ goto fail1;
+
+ dev->ff->upload = uinput_dev_upload_effect;
+ dev->ff->erase = uinput_dev_erase_effect;
+ dev->ff->playback = uinput_dev_playback;
+ dev->ff->set_gain = uinput_dev_set_gain;
+ dev->ff->set_autocenter = uinput_dev_set_autocenter;
+ }
- clear_bit(UIST_CREATED, &(udev->state));
+ error = input_register_device(udev->dev);
+ if (error)
+ goto fail2;
+
+ udev->state = UIST_CREATED;
return 0;
+
+ fail2: input_ff_destroy(dev);
+ fail1: uinput_destroy_device(udev);
+ return error;
}
static int uinput_open(struct inode *inode, struct file *file)
{
- struct uinput_device *newdev;
- struct input_dev *newinput;
+ struct uinput_device *newdev;
- newdev = kmalloc(sizeof(struct uinput_device), GFP_KERNEL);
+ newdev = kzalloc(sizeof(struct uinput_device), GFP_KERNEL);
if (!newdev)
- goto error;
- memset(newdev, 0, sizeof(struct uinput_device));
+ return -ENOMEM;
- newinput = kmalloc(sizeof(struct input_dev), GFP_KERNEL);
- if (!newinput)
- goto cleanup;
- memset(newinput, 0, sizeof(struct input_dev));
-
- newdev->dev = newinput;
+ mutex_init(&newdev->mutex);
+ spin_lock_init(&newdev->requests_lock);
+ init_waitqueue_head(&newdev->requests_waitq);
+ init_waitqueue_head(&newdev->waitq);
+ newdev->state = UIST_NEW_DEVICE;
file->private_data = newdev;
return 0;
-cleanup:
- kfree(newdev);
-error:
- return -ENOMEM;
}
static int uinput_validate_absbits(struct input_dev *dev)
unsigned int cnt;
int retval = 0;
- for (cnt = 0; cnt < ABS_MAX; cnt++) {
+ for (cnt = 0; cnt < ABS_MAX + 1; cnt++) {
if (!test_bit(cnt, dev->absbit))
continue;
- if (/*!dev->absmin[cnt] || !dev->absmax[cnt] || */
- (dev->absmax[cnt] <= dev->absmin[cnt])) {
+ if ((dev->absmax[cnt] <= dev->absmin[cnt])) {
printk(KERN_DEBUG
"%s: invalid abs[%02x] min:%d max:%d\n",
UINPUT_NAME, cnt,
break;
}
- if ((dev->absflat[cnt] < dev->absmin[cnt]) ||
- (dev->absflat[cnt] > dev->absmax[cnt])) {
+ if (dev->absflat[cnt] > (dev->absmax[cnt] - dev->absmin[cnt])) {
printk(KERN_DEBUG
"%s: absflat[%02x] out of range: %d "
"(min:%d/max:%d)\n",
return retval;
}
-static int uinput_alloc_device(struct file *file, const char __user *buffer, size_t count)
+static int uinput_allocate_device(struct uinput_device *udev)
+{
+ udev->dev = input_allocate_device();
+ if (!udev->dev)
+ return -ENOMEM;
+
+ udev->dev->event = uinput_dev_event;
+ udev->dev->private = udev;
+
+ return 0;
+}
+
+static int uinput_setup_device(struct uinput_device *udev, const char __user *buffer, size_t count)
{
struct uinput_user_dev *user_dev;
struct input_dev *dev;
- struct uinput_device *udev;
- int size,
- retval;
+ char *name;
+ int size;
+ int retval;
- retval = count;
+ if (count != sizeof(struct uinput_user_dev))
+ return -EINVAL;
+
+ if (!udev->dev) {
+ retval = uinput_allocate_device(udev);
+ if (retval)
+ return retval;
+ }
- udev = (struct uinput_device *)file->private_data;
dev = udev->dev;
- user_dev = kmalloc(sizeof(*user_dev), GFP_KERNEL);
- if (!user_dev) {
- retval = -ENOMEM;
- goto exit;
- }
+ user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL);
+ if (!user_dev)
+ return -ENOMEM;
if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) {
retval = -EFAULT;
goto exit;
}
- if (NULL != dev->name)
- kfree(dev->name);
+ udev->ff_effects_max = user_dev->ff_effects_max;
size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1;
- dev->name = kmalloc(size, GFP_KERNEL);
- if (!dev->name) {
+ if (!size) {
+ retval = -EINVAL;
+ goto exit;
+ }
+
+ kfree(dev->name);
+ dev->name = name = kmalloc(size, GFP_KERNEL);
+ if (!name) {
retval = -ENOMEM;
goto exit;
}
+ strlcpy(name, user_dev->name, size);
- strlcpy(dev->name, user_dev->name, size);
dev->id.bustype = user_dev->id.bustype;
dev->id.vendor = user_dev->id.vendor;
dev->id.product = user_dev->id.product;
dev->id.version = user_dev->id.version;
- dev->ff_effects_max = user_dev->ff_effects_max;
size = sizeof(int) * (ABS_MAX + 1);
memcpy(dev->absmax, user_dev->absmax, size);
if (test_bit(EV_ABS, dev->evbit)) {
retval = uinput_validate_absbits(dev);
if (retval < 0)
- kfree(dev->name);
+ goto exit;
}
-exit:
+ udev->state = UIST_SETUP_COMPLETE;
+ retval = count;
+
+ exit:
kfree(user_dev);
return retval;
}
+static inline ssize_t uinput_inject_event(struct uinput_device *udev, const char __user *buffer, size_t count)
+{
+ struct input_event ev;
+
+ if (count != sizeof(struct input_event))
+ return -EINVAL;
+
+ if (copy_from_user(&ev, buffer, sizeof(struct input_event)))
+ return -EFAULT;
+
+ input_event(udev->dev, ev.type, ev.code, ev.value);
+
+ return sizeof(struct input_event);
+}
+
static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
{
- struct uinput_device *udev = file->private_data;
+ struct uinput_device *udev = file->private_data;
+ int retval;
- if (test_bit(UIST_CREATED, &(udev->state))) {
- struct input_event ev;
+ retval = mutex_lock_interruptible(&udev->mutex);
+ if (retval)
+ return retval;
- if (copy_from_user(&ev, buffer, sizeof(struct input_event)))
- return -EFAULT;
- input_event(udev->dev, ev.type, ev.code, ev.value);
- }
- else
- count = uinput_alloc_device(file, buffer, count);
+ retval = udev->state == UIST_CREATED ?
+ uinput_inject_event(udev, buffer, count) :
+ uinput_setup_device(udev, buffer, count);
- return count;
+ mutex_unlock(&udev->mutex);
+
+ return retval;
}
static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
struct uinput_device *udev = file->private_data;
int retval = 0;
- if (!test_bit(UIST_CREATED, &(udev->state)))
+ if (udev->state != UIST_CREATED)
return -ENODEV;
- if ((udev->head == udev->tail) && (file->f_flags & O_NONBLOCK))
+ if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK))
return -EAGAIN;
retval = wait_event_interruptible(udev->waitq,
- (udev->head != udev->tail) ||
- !test_bit(UIST_CREATED, &(udev->state)));
+ udev->head != udev->tail || udev->state != UIST_CREATED);
+ if (retval)
+ return retval;
+ retval = mutex_lock_interruptible(&udev->mutex);
if (retval)
return retval;
- if (!test_bit(UIST_CREATED, &(udev->state)))
- return -ENODEV;
+ if (udev->state != UIST_CREATED) {
+ retval = -ENODEV;
+ goto out;
+ }
- while ((udev->head != udev->tail) &&
- (retval + sizeof(struct input_event) <= count)) {
- if (copy_to_user(buffer + retval, &(udev->buff[udev->tail]),
- sizeof(struct input_event))) return -EFAULT;
+ while (udev->head != udev->tail && retval + sizeof(struct input_event) <= count) {
+ if (copy_to_user(buffer + retval, &udev->buff[udev->tail], sizeof(struct input_event))) {
+ retval = -EFAULT;
+ goto out;
+ }
udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE;
retval += sizeof(struct input_event);
}
+ out:
+ mutex_unlock(&udev->mutex);
+
return retval;
}
{
struct uinput_device *udev = file->private_data;
- if (!test_bit(UIST_CREATED, &(udev->state)))
- return 0;
-
poll_wait(file, &udev->waitq, wait);
if (udev->head != udev->tail)
return 0;
}
-static int uinput_burn_device(struct uinput_device *udev)
+static int uinput_release(struct inode *inode, struct file *file)
{
- if (test_bit(UIST_CREATED, &(udev->state)))
- uinput_destroy_device(udev);
+ struct uinput_device *udev = file->private_data;
- kfree(udev->dev);
+ uinput_destroy_device(udev);
kfree(udev);
return 0;
}
-static int uinput_close(struct inode *inode, struct file *file)
-{
- return uinput_burn_device((struct uinput_device *)file->private_data);
-}
-
-static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+#define uinput_set_bit(_arg, _bit, _max) \
+({ \
+ int __ret = 0; \
+ if (udev->state == UIST_CREATED) \
+ __ret = -EINVAL; \
+ else if ((_arg) > (_max)) \
+ __ret = -EINVAL; \
+ else set_bit((_arg), udev->dev->_bit); \
+ __ret; \
+})
+
+static long uinput_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- int retval = 0;
+ int retval;
struct uinput_device *udev;
+ void __user *p = (void __user *)arg;
+ struct uinput_ff_upload ff_up;
+ struct uinput_ff_erase ff_erase;
+ struct uinput_request *req;
+ int length;
+ char *phys;
- udev = (struct uinput_device *)file->private_data;
+ udev = file->private_data;
- /* device attributes can not be changed after the device is created */
- if (cmd >= UI_SET_EVBIT && test_bit(UIST_CREATED, &(udev->state)))
- return -EINVAL;
+ retval = mutex_lock_interruptible(&udev->mutex);
+ if (retval)
+ return retval;
+
+ if (!udev->dev) {
+ retval = uinput_allocate_device(udev);
+ if (retval)
+ goto out;
+ }
switch (cmd) {
case UI_DEV_CREATE:
break;
case UI_DEV_DESTROY:
- retval = uinput_destroy_device(udev);
+ uinput_destroy_device(udev);
break;
case UI_SET_EVBIT:
- if (arg > EV_MAX) {
- retval = -EINVAL;
- break;
- }
- set_bit(arg, udev->dev->evbit);
+ retval = uinput_set_bit(arg, evbit, EV_MAX);
break;
case UI_SET_KEYBIT:
- if (arg > KEY_MAX) {
- retval = -EINVAL;
- break;
- }
- set_bit(arg, udev->dev->keybit);
+ retval = uinput_set_bit(arg, keybit, KEY_MAX);
break;
case UI_SET_RELBIT:
- if (arg > REL_MAX) {
- retval = -EINVAL;
- break;
- }
- set_bit(arg, udev->dev->relbit);
+ retval = uinput_set_bit(arg, relbit, REL_MAX);
break;
case UI_SET_ABSBIT:
- if (arg > ABS_MAX) {
+ retval = uinput_set_bit(arg, absbit, ABS_MAX);
+ break;
+
+ case UI_SET_MSCBIT:
+ retval = uinput_set_bit(arg, mscbit, MSC_MAX);
+ break;
+
+ case UI_SET_LEDBIT:
+ retval = uinput_set_bit(arg, ledbit, LED_MAX);
+ break;
+
+ case UI_SET_SNDBIT:
+ retval = uinput_set_bit(arg, sndbit, SND_MAX);
+ break;
+
+ case UI_SET_FFBIT:
+ retval = uinput_set_bit(arg, ffbit, FF_MAX);
+ break;
+
+ case UI_SET_SWBIT:
+ retval = uinput_set_bit(arg, swbit, SW_MAX);
+ break;
+
+ case UI_SET_PHYS:
+ if (udev->state == UIST_CREATED) {
retval = -EINVAL;
+ goto out;
+ }
+ length = strnlen_user(p, 1024);
+ if (length <= 0) {
+ retval = -EFAULT;
break;
}
- set_bit(arg, udev->dev->absbit);
+ kfree(udev->dev->phys);
+ udev->dev->phys = phys = kmalloc(length, GFP_KERNEL);
+ if (!phys) {
+ retval = -ENOMEM;
+ break;
+ }
+ if (copy_from_user(phys, p, length)) {
+ udev->dev->phys = NULL;
+ kfree(phys);
+ retval = -EFAULT;
+ break;
+ }
+ phys[length - 1] = '\0';
break;
- case UI_SET_MSCBIT:
- if (arg > MSC_MAX) {
+ case UI_BEGIN_FF_UPLOAD:
+ if (copy_from_user(&ff_up, p, sizeof(ff_up))) {
+ retval = -EFAULT;
+ break;
+ }
+ req = uinput_request_find(udev, ff_up.request_id);
+ if (!(req && req->code == UI_FF_UPLOAD && req->u.upload.effect)) {
retval = -EINVAL;
break;
}
- set_bit(arg, udev->dev->mscbit);
+ ff_up.retval = 0;
+ memcpy(&ff_up.effect, req->u.upload.effect, sizeof(struct ff_effect));
+ if (req->u.upload.old)
+ memcpy(&ff_up.old, req->u.upload.old, sizeof(struct ff_effect));
+ else
+ memset(&ff_up.old, 0, sizeof(struct ff_effect));
+
+ if (copy_to_user(p, &ff_up, sizeof(ff_up))) {
+ retval = -EFAULT;
+ break;
+ }
break;
- case UI_SET_LEDBIT:
- if (arg > LED_MAX) {
+ case UI_BEGIN_FF_ERASE:
+ if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) {
+ retval = -EFAULT;
+ break;
+ }
+ req = uinput_request_find(udev, ff_erase.request_id);
+ if (!(req && req->code == UI_FF_ERASE)) {
retval = -EINVAL;
break;
}
- set_bit(arg, udev->dev->ledbit);
+ ff_erase.retval = 0;
+ ff_erase.effect_id = req->u.effect_id;
+ if (copy_to_user(p, &ff_erase, sizeof(ff_erase))) {
+ retval = -EFAULT;
+ break;
+ }
break;
- case UI_SET_SNDBIT:
- if (arg > SND_MAX) {
+ case UI_END_FF_UPLOAD:
+ if (copy_from_user(&ff_up, p, sizeof(ff_up))) {
+ retval = -EFAULT;
+ break;
+ }
+ req = uinput_request_find(udev, ff_up.request_id);
+ if (!(req && req->code == UI_FF_UPLOAD && req->u.upload.effect)) {
retval = -EINVAL;
break;
}
- set_bit(arg, udev->dev->sndbit);
+ req->retval = ff_up.retval;
+ uinput_request_done(udev, req);
break;
- case UI_SET_FFBIT:
- if (arg > FF_MAX) {
+ case UI_END_FF_ERASE:
+ if (copy_from_user(&ff_erase, p, sizeof(ff_erase))) {
+ retval = -EFAULT;
+ break;
+ }
+ req = uinput_request_find(udev, ff_erase.request_id);
+ if (!(req && req->code == UI_FF_ERASE)) {
retval = -EINVAL;
break;
}
- set_bit(arg, udev->dev->ffbit);
+ req->retval = ff_erase.retval;
+ uinput_request_done(udev, req);
break;
default:
- retval = -EFAULT;
+ retval = -EINVAL;
}
+
+ out:
+ mutex_unlock(&udev->mutex);
return retval;
}
-struct file_operations uinput_fops = {
- .owner = THIS_MODULE,
- .open = uinput_open,
- .release = uinput_close,
- .read = uinput_read,
- .write = uinput_write,
- .poll = uinput_poll,
- .ioctl = uinput_ioctl,
+static struct file_operations uinput_fops = {
+ .owner = THIS_MODULE,
+ .open = uinput_open,
+ .release = uinput_release,
+ .read = uinput_read,
+ .write = uinput_write,
+ .poll = uinput_poll,
+ .unlocked_ioctl = uinput_ioctl,
};
static struct miscdevice uinput_misc = {
- .fops = &uinput_fops,
- .minor = UINPUT_MINOR,
- .name = UINPUT_NAME,
+ .fops = &uinput_fops,
+ .minor = UINPUT_MINOR,
+ .name = UINPUT_NAME,
};
static int __init uinput_init(void)
MODULE_AUTHOR("Aristeu Sergio Rozanski Filho");
MODULE_DESCRIPTION("User level driver support for input subsystem");
MODULE_LICENSE("GPL");
+MODULE_VERSION("0.3");
module_init(uinput_init);
module_exit(uinput_exit);
git://git.onelab.eu / linux-2.6.git / blobdiff