Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
commit
1da177e4c3
17291 changed files with 6718755 additions and 0 deletions
620
drivers/input/misc/uinput.c
Normal file
620
drivers/input/misc/uinput.c
Normal file
|
|
@ -0,0 +1,620 @@
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|||
/*
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* User level driver support for input subsystem
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*
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* Heavily based on evdev.c by Vojtech Pavlik
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||||
*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
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*
|
||||
* You should have received a copy of the GNU General Public License
|
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* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
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*
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* Changes/Revisions:
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* 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>)
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* - added force feedback support
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* - added UI_SET_PHYS
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* 0.1 20/06/2002
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* - first public version
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*/
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#include <linux/poll.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/smp_lock.h>
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#include <linux/fs.h>
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#include <linux/miscdevice.h>
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#include <linux/uinput.h>
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static int uinput_dev_open(struct input_dev *dev)
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{
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return 0;
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}
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static void uinput_dev_close(struct input_dev *dev)
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{
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}
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static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
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{
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struct uinput_device *udev;
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udev = dev->private;
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udev->buff[udev->head].type = type;
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udev->buff[udev->head].code = code;
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udev->buff[udev->head].value = value;
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do_gettimeofday(&udev->buff[udev->head].time);
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udev->head = (udev->head + 1) % UINPUT_BUFFER_SIZE;
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wake_up_interruptible(&udev->waitq);
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return 0;
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}
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static int uinput_request_alloc_id(struct input_dev *dev, struct uinput_request *request)
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{
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/* Atomically allocate an ID for the given request. Returns 0 on success. */
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struct uinput_device *udev = dev->private;
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int id;
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down(&udev->requests_sem);
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for (id=0; id<UINPUT_NUM_REQUESTS; id++)
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if (!udev->requests[id]) {
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udev->requests[id] = request;
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request->id = id;
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up(&udev->requests_sem);
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return 0;
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}
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up(&udev->requests_sem);
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return -1;
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}
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static struct uinput_request* uinput_request_find(struct uinput_device *udev, int id)
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{
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/* Find an input request, by ID. Returns NULL if the ID isn't valid. */
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if (id >= UINPUT_NUM_REQUESTS || id < 0)
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return NULL;
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if (udev->requests[id]->completed)
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return NULL;
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return udev->requests[id];
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}
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static void uinput_request_init(struct input_dev *dev, struct uinput_request *request, int code)
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{
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struct uinput_device *udev = dev->private;
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memset(request, 0, sizeof(struct uinput_request));
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request->code = code;
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init_waitqueue_head(&request->waitq);
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/* Allocate an ID. If none are available right away, wait. */
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request->retval = wait_event_interruptible(udev->requests_waitq,
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!uinput_request_alloc_id(dev, request));
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}
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static void uinput_request_submit(struct input_dev *dev, struct uinput_request *request)
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{
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struct uinput_device *udev = dev->private;
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int retval;
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/* Tell our userspace app about this new request by queueing an input event */
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uinput_dev_event(dev, EV_UINPUT, request->code, request->id);
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/* Wait for the request to complete */
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retval = wait_event_interruptible(request->waitq, request->completed);
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if (retval)
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request->retval = retval;
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/* Release this request's ID, let others know it's available */
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udev->requests[request->id] = NULL;
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wake_up_interruptible(&udev->requests_waitq);
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}
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static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect)
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{
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struct uinput_request request;
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if (!test_bit(EV_FF, dev->evbit))
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return -ENOSYS;
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uinput_request_init(dev, &request, UI_FF_UPLOAD);
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if (request.retval)
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return request.retval;
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request.u.effect = effect;
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uinput_request_submit(dev, &request);
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return request.retval;
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}
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static int uinput_dev_erase_effect(struct input_dev *dev, int effect_id)
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{
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struct uinput_request request;
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if (!test_bit(EV_FF, dev->evbit))
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return -ENOSYS;
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uinput_request_init(dev, &request, UI_FF_ERASE);
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if (request.retval)
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return request.retval;
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request.u.effect_id = effect_id;
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uinput_request_submit(dev, &request);
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return request.retval;
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}
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static int uinput_create_device(struct uinput_device *udev)
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{
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if (!udev->dev->name) {
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printk(KERN_DEBUG "%s: write device info first\n", UINPUT_NAME);
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return -EINVAL;
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}
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udev->dev->open = uinput_dev_open;
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udev->dev->close = uinput_dev_close;
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udev->dev->event = uinput_dev_event;
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udev->dev->upload_effect = uinput_dev_upload_effect;
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udev->dev->erase_effect = uinput_dev_erase_effect;
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udev->dev->private = udev;
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init_waitqueue_head(&(udev->waitq));
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input_register_device(udev->dev);
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set_bit(UIST_CREATED, &(udev->state));
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return 0;
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}
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static int uinput_destroy_device(struct uinput_device *udev)
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{
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if (!test_bit(UIST_CREATED, &(udev->state))) {
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printk(KERN_WARNING "%s: create the device first\n", UINPUT_NAME);
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return -EINVAL;
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}
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input_unregister_device(udev->dev);
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clear_bit(UIST_CREATED, &(udev->state));
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return 0;
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}
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static int uinput_open(struct inode *inode, struct file *file)
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{
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struct uinput_device *newdev;
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struct input_dev *newinput;
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newdev = kmalloc(sizeof(struct uinput_device), GFP_KERNEL);
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if (!newdev)
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goto error;
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memset(newdev, 0, sizeof(struct uinput_device));
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init_MUTEX(&newdev->requests_sem);
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init_waitqueue_head(&newdev->requests_waitq);
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newinput = kmalloc(sizeof(struct input_dev), GFP_KERNEL);
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if (!newinput)
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goto cleanup;
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memset(newinput, 0, sizeof(struct input_dev));
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newdev->dev = newinput;
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file->private_data = newdev;
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return 0;
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cleanup:
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kfree(newdev);
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error:
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return -ENOMEM;
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}
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static int uinput_validate_absbits(struct input_dev *dev)
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{
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unsigned int cnt;
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int retval = 0;
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for (cnt = 0; cnt < ABS_MAX + 1; cnt++) {
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if (!test_bit(cnt, dev->absbit))
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continue;
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if ((dev->absmax[cnt] <= dev->absmin[cnt])) {
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printk(KERN_DEBUG
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"%s: invalid abs[%02x] min:%d max:%d\n",
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UINPUT_NAME, cnt,
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dev->absmin[cnt], dev->absmax[cnt]);
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retval = -EINVAL;
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break;
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}
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if (dev->absflat[cnt] > (dev->absmax[cnt] - dev->absmin[cnt])) {
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printk(KERN_DEBUG
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"%s: absflat[%02x] out of range: %d "
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"(min:%d/max:%d)\n",
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UINPUT_NAME, cnt, dev->absflat[cnt],
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dev->absmin[cnt], dev->absmax[cnt]);
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retval = -EINVAL;
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break;
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}
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}
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return retval;
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}
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static int uinput_alloc_device(struct file *file, const char __user *buffer, size_t count)
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{
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struct uinput_user_dev *user_dev;
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struct input_dev *dev;
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struct uinput_device *udev;
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int size,
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retval;
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retval = count;
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udev = file->private_data;
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dev = udev->dev;
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user_dev = kmalloc(sizeof(*user_dev), GFP_KERNEL);
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if (!user_dev) {
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retval = -ENOMEM;
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goto exit;
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}
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if (copy_from_user(user_dev, buffer, sizeof(struct uinput_user_dev))) {
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retval = -EFAULT;
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goto exit;
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}
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if (NULL != dev->name)
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kfree(dev->name);
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size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1;
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dev->name = kmalloc(size, GFP_KERNEL);
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if (!dev->name) {
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retval = -ENOMEM;
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goto exit;
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}
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strlcpy(dev->name, user_dev->name, size);
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dev->id.bustype = user_dev->id.bustype;
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dev->id.vendor = user_dev->id.vendor;
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dev->id.product = user_dev->id.product;
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dev->id.version = user_dev->id.version;
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dev->ff_effects_max = user_dev->ff_effects_max;
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size = sizeof(int) * (ABS_MAX + 1);
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memcpy(dev->absmax, user_dev->absmax, size);
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memcpy(dev->absmin, user_dev->absmin, size);
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memcpy(dev->absfuzz, user_dev->absfuzz, size);
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memcpy(dev->absflat, user_dev->absflat, size);
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/* check if absmin/absmax/absfuzz/absflat are filled as
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* told in Documentation/input/input-programming.txt */
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if (test_bit(EV_ABS, dev->evbit)) {
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retval = uinput_validate_absbits(dev);
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if (retval < 0)
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kfree(dev->name);
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||||
}
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||||
exit:
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kfree(user_dev);
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return retval;
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||||
}
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static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
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||||
{
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||||
struct uinput_device *udev = file->private_data;
|
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|
||||
if (test_bit(UIST_CREATED, &(udev->state))) {
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||||
struct input_event ev;
|
||||
|
||||
if (copy_from_user(&ev, buffer, sizeof(struct input_event)))
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||||
return -EFAULT;
|
||||
input_event(udev->dev, ev.type, ev.code, ev.value);
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||||
}
|
||||
else
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||||
count = uinput_alloc_device(file, buffer, count);
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||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
|
||||
{
|
||||
struct uinput_device *udev = file->private_data;
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||||
int retval = 0;
|
||||
|
||||
if (!test_bit(UIST_CREATED, &(udev->state)))
|
||||
return -ENODEV;
|
||||
|
||||
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)));
|
||||
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
if (!test_bit(UIST_CREATED, &(udev->state)))
|
||||
return -ENODEV;
|
||||
|
||||
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;
|
||||
udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE;
|
||||
retval += sizeof(struct input_event);
|
||||
}
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static unsigned int uinput_poll(struct file *file, poll_table *wait)
|
||||
{
|
||||
struct uinput_device *udev = file->private_data;
|
||||
|
||||
poll_wait(file, &udev->waitq, wait);
|
||||
|
||||
if (udev->head != udev->tail)
|
||||
return POLLIN | POLLRDNORM;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int uinput_burn_device(struct uinput_device *udev)
|
||||
{
|
||||
if (test_bit(UIST_CREATED, &(udev->state)))
|
||||
uinput_destroy_device(udev);
|
||||
|
||||
if (NULL != udev->dev->name)
|
||||
kfree(udev->dev->name);
|
||||
if (NULL != udev->dev->phys)
|
||||
kfree(udev->dev->phys);
|
||||
|
||||
kfree(udev->dev);
|
||||
kfree(udev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int uinput_close(struct inode *inode, struct file *file)
|
||||
{
|
||||
return uinput_burn_device(file->private_data);
|
||||
}
|
||||
|
||||
static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
int retval = 0;
|
||||
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;
|
||||
|
||||
udev = file->private_data;
|
||||
|
||||
/* device attributes can not be changed after the device is created */
|
||||
switch (cmd) {
|
||||
case UI_SET_EVBIT:
|
||||
case UI_SET_KEYBIT:
|
||||
case UI_SET_RELBIT:
|
||||
case UI_SET_ABSBIT:
|
||||
case UI_SET_MSCBIT:
|
||||
case UI_SET_LEDBIT:
|
||||
case UI_SET_SNDBIT:
|
||||
case UI_SET_FFBIT:
|
||||
case UI_SET_PHYS:
|
||||
if (test_bit(UIST_CREATED, &(udev->state)))
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
switch (cmd) {
|
||||
case UI_DEV_CREATE:
|
||||
retval = uinput_create_device(udev);
|
||||
break;
|
||||
|
||||
case UI_DEV_DESTROY:
|
||||
retval = uinput_destroy_device(udev);
|
||||
break;
|
||||
|
||||
case UI_SET_EVBIT:
|
||||
if (arg > EV_MAX) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
set_bit(arg, udev->dev->evbit);
|
||||
break;
|
||||
|
||||
case UI_SET_KEYBIT:
|
||||
if (arg > KEY_MAX) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
set_bit(arg, udev->dev->keybit);
|
||||
break;
|
||||
|
||||
case UI_SET_RELBIT:
|
||||
if (arg > REL_MAX) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
set_bit(arg, udev->dev->relbit);
|
||||
break;
|
||||
|
||||
case UI_SET_ABSBIT:
|
||||
if (arg > ABS_MAX) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
set_bit(arg, udev->dev->absbit);
|
||||
break;
|
||||
|
||||
case UI_SET_MSCBIT:
|
||||
if (arg > MSC_MAX) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
set_bit(arg, udev->dev->mscbit);
|
||||
break;
|
||||
|
||||
case UI_SET_LEDBIT:
|
||||
if (arg > LED_MAX) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
set_bit(arg, udev->dev->ledbit);
|
||||
break;
|
||||
|
||||
case UI_SET_SNDBIT:
|
||||
if (arg > SND_MAX) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
set_bit(arg, udev->dev->sndbit);
|
||||
break;
|
||||
|
||||
case UI_SET_FFBIT:
|
||||
if (arg > FF_MAX) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
set_bit(arg, udev->dev->ffbit);
|
||||
break;
|
||||
|
||||
case UI_SET_PHYS:
|
||||
length = strnlen_user(p, 1024);
|
||||
if (length <= 0) {
|
||||
retval = -EFAULT;
|
||||
break;
|
||||
}
|
||||
if (NULL != udev->dev->phys)
|
||||
kfree(udev->dev->phys);
|
||||
udev->dev->phys = kmalloc(length, GFP_KERNEL);
|
||||
if (!udev->dev->phys) {
|
||||
retval = -ENOMEM;
|
||||
break;
|
||||
}
|
||||
if (copy_from_user(udev->dev->phys, p, length)) {
|
||||
retval = -EFAULT;
|
||||
kfree(udev->dev->phys);
|
||||
udev->dev->phys = NULL;
|
||||
break;
|
||||
}
|
||||
udev->dev->phys[length-1] = '\0';
|
||||
break;
|
||||
|
||||
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.effect)) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
ff_up.retval = 0;
|
||||
memcpy(&ff_up.effect, req->u.effect, sizeof(struct ff_effect));
|
||||
if (copy_to_user(p, &ff_up, sizeof(ff_up))) {
|
||||
retval = -EFAULT;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
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;
|
||||
}
|
||||
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_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.effect)) {
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
req->retval = ff_up.retval;
|
||||
memcpy(req->u.effect, &ff_up.effect, sizeof(struct ff_effect));
|
||||
req->completed = 1;
|
||||
wake_up_interruptible(&req->waitq);
|
||||
break;
|
||||
|
||||
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;
|
||||
}
|
||||
req->retval = ff_erase.retval;
|
||||
req->completed = 1;
|
||||
wake_up_interruptible(&req->waitq);
|
||||
break;
|
||||
|
||||
default:
|
||||
retval = -EINVAL;
|
||||
}
|
||||
return retval;
|
||||
}
|
||||
|
||||
static 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 miscdevice uinput_misc = {
|
||||
.fops = &uinput_fops,
|
||||
.minor = UINPUT_MINOR,
|
||||
.name = UINPUT_NAME,
|
||||
};
|
||||
|
||||
static int __init uinput_init(void)
|
||||
{
|
||||
return misc_register(&uinput_misc);
|
||||
}
|
||||
|
||||
static void __exit uinput_exit(void)
|
||||
{
|
||||
misc_deregister(&uinput_misc);
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Aristeu Sergio Rozanski Filho");
|
||||
MODULE_DESCRIPTION("User level driver support for input subsystem");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
module_init(uinput_init);
|
||||
module_exit(uinput_exit);
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue