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!
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
new file mode 100644
index 0000000..17552a2
--- /dev/null
+++ b/drivers/input/evdev.c
@@ -0,0 +1,492 @@
+/*
+ * Event char devices, giving access to raw input device events.
+ *
+ * Copyright (c) 1999-2002 Vojtech Pavlik
+ *
+ * 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.
+ */
+
+#define EVDEV_MINOR_BASE 64
+#define EVDEV_MINORS 32
+#define EVDEV_BUFFER_SIZE 64
+
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/major.h>
+#include <linux/smp_lock.h>
+#include <linux/device.h>
+#include <linux/devfs_fs_kernel.h>
+
+struct evdev {
+ int exist;
+ int open;
+ int minor;
+ char name[16];
+ struct input_handle handle;
+ wait_queue_head_t wait;
+ struct evdev_list *grab;
+ struct list_head list;
+};
+
+struct evdev_list {
+ struct input_event buffer[EVDEV_BUFFER_SIZE];
+ int head;
+ int tail;
+ struct fasync_struct *fasync;
+ struct evdev *evdev;
+ struct list_head node;
+};
+
+static struct evdev *evdev_table[EVDEV_MINORS];
+
+static void evdev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
+{
+ struct evdev *evdev = handle->private;
+ struct evdev_list *list;
+
+ if (evdev->grab) {
+ list = evdev->grab;
+
+ do_gettimeofday(&list->buffer[list->head].time);
+ list->buffer[list->head].type = type;
+ list->buffer[list->head].code = code;
+ list->buffer[list->head].value = value;
+ list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
+
+ kill_fasync(&list->fasync, SIGIO, POLL_IN);
+ } else
+ list_for_each_entry(list, &evdev->list, node) {
+
+ do_gettimeofday(&list->buffer[list->head].time);
+ list->buffer[list->head].type = type;
+ list->buffer[list->head].code = code;
+ list->buffer[list->head].value = value;
+ list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
+
+ kill_fasync(&list->fasync, SIGIO, POLL_IN);
+ }
+
+ wake_up_interruptible(&evdev->wait);
+}
+
+static int evdev_fasync(int fd, struct file *file, int on)
+{
+ int retval;
+ struct evdev_list *list = file->private_data;
+ retval = fasync_helper(fd, file, on, &list->fasync);
+ return retval < 0 ? retval : 0;
+}
+
+static int evdev_flush(struct file * file)
+{
+ struct evdev_list *list = file->private_data;
+ if (!list->evdev->exist) return -ENODEV;
+ return input_flush_device(&list->evdev->handle, file);
+}
+
+static void evdev_free(struct evdev *evdev)
+{
+ evdev_table[evdev->minor] = NULL;
+ kfree(evdev);
+}
+
+static int evdev_release(struct inode * inode, struct file * file)
+{
+ struct evdev_list *list = file->private_data;
+
+ if (list->evdev->grab == list) {
+ input_release_device(&list->evdev->handle);
+ list->evdev->grab = NULL;
+ }
+
+ evdev_fasync(-1, file, 0);
+ list_del(&list->node);
+
+ if (!--list->evdev->open) {
+ if (list->evdev->exist)
+ input_close_device(&list->evdev->handle);
+ else
+ evdev_free(list->evdev);
+ }
+
+ kfree(list);
+ return 0;
+}
+
+static int evdev_open(struct inode * inode, struct file * file)
+{
+ struct evdev_list *list;
+ int i = iminor(inode) - EVDEV_MINOR_BASE;
+ int accept_err;
+
+ if (i >= EVDEV_MINORS || !evdev_table[i] || !evdev_table[i]->exist)
+ return -ENODEV;
+
+ if ((accept_err = input_accept_process(&(evdev_table[i]->handle), file)))
+ return accept_err;
+
+ if (!(list = kmalloc(sizeof(struct evdev_list), GFP_KERNEL)))
+ return -ENOMEM;
+ memset(list, 0, sizeof(struct evdev_list));
+
+ list->evdev = evdev_table[i];
+ list_add_tail(&list->node, &evdev_table[i]->list);
+ file->private_data = list;
+
+ if (!list->evdev->open++)
+ if (list->evdev->exist)
+ input_open_device(&list->evdev->handle);
+
+ return 0;
+}
+
+static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
+{
+ struct evdev_list *list = file->private_data;
+ struct input_event event;
+ int retval = 0;
+
+ if (!list->evdev->exist) return -ENODEV;
+
+ while (retval < count) {
+
+ if (copy_from_user(&event, buffer + retval, sizeof(struct input_event)))
+ return -EFAULT;
+ input_event(list->evdev->handle.dev, event.type, event.code, event.value);
+ retval += sizeof(struct input_event);
+ }
+
+ return retval;
+}
+
+static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
+{
+ struct evdev_list *list = file->private_data;
+ int retval;
+
+ if (count < sizeof(struct input_event))
+ return -EINVAL;
+
+ if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
+ return -EAGAIN;
+
+ retval = wait_event_interruptible(list->evdev->wait,
+ list->head != list->tail || (!list->evdev->exist));
+
+ if (retval)
+ return retval;
+
+ if (!list->evdev->exist)
+ return -ENODEV;
+
+ while (list->head != list->tail && retval + sizeof(struct input_event) <= count) {
+ if (copy_to_user(buffer + retval, list->buffer + list->tail,
+ sizeof(struct input_event))) return -EFAULT;
+ list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
+ retval += sizeof(struct input_event);
+ }
+
+ return retval;
+}
+
+/* No kernel lock - fine */
+static unsigned int evdev_poll(struct file *file, poll_table *wait)
+{
+ struct evdev_list *list = file->private_data;
+ poll_wait(file, &list->evdev->wait, wait);
+ return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
+ (list->evdev->exist ? 0 : (POLLHUP | POLLERR));
+}
+
+static int evdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct evdev_list *list = file->private_data;
+ struct evdev *evdev = list->evdev;
+ struct input_dev *dev = evdev->handle.dev;
+ struct input_absinfo abs;
+ void __user *p = (void __user *)arg;
+ int __user *ip = (int __user *)arg;
+ int i, t, u, v;
+
+ if (!evdev->exist) return -ENODEV;
+
+ switch (cmd) {
+
+ case EVIOCGVERSION:
+ return put_user(EV_VERSION, ip);
+
+ case EVIOCGID:
+ return copy_to_user(p, &dev->id, sizeof(struct input_id)) ? -EFAULT : 0;
+
+ case EVIOCGKEYCODE:
+ if (get_user(t, ip)) return -EFAULT;
+ if (t < 0 || t >= dev->keycodemax || !dev->keycodesize) return -EINVAL;
+ if (put_user(INPUT_KEYCODE(dev, t), ip + 1)) return -EFAULT;
+ return 0;
+
+ case EVIOCSKEYCODE:
+ if (get_user(t, ip)) return -EFAULT;
+ if (t < 0 || t >= dev->keycodemax || !dev->keycodesize) return -EINVAL;
+ if (get_user(v, ip + 1)) return -EFAULT;
+ if (v < 0 || v > KEY_MAX) return -EINVAL;
+ u = SET_INPUT_KEYCODE(dev, t, v);
+ clear_bit(u, dev->keybit);
+ set_bit(v, dev->keybit);
+ for (i = 0; i < dev->keycodemax; i++)
+ if (INPUT_KEYCODE(dev,i) == u)
+ set_bit(u, dev->keybit);
+ return 0;
+
+ case EVIOCSFF:
+ if (dev->upload_effect) {
+ struct ff_effect effect;
+ int err;
+
+ if (copy_from_user(&effect, p, sizeof(effect)))
+ return -EFAULT;
+ err = dev->upload_effect(dev, &effect);
+ if (put_user(effect.id, &(((struct ff_effect __user *)arg)->id)))
+ return -EFAULT;
+ return err;
+ }
+ else return -ENOSYS;
+
+ case EVIOCRMFF:
+ if (dev->erase_effect) {
+ return dev->erase_effect(dev, (int)arg);
+ }
+ else return -ENOSYS;
+
+ case EVIOCGEFFECTS:
+ if (put_user(dev->ff_effects_max, ip))
+ return -EFAULT;
+ return 0;
+
+ case EVIOCGRAB:
+ if (arg) {
+ if (evdev->grab)
+ return -EBUSY;
+ if (input_grab_device(&evdev->handle))
+ return -EBUSY;
+ evdev->grab = list;
+ return 0;
+ } else {
+ if (evdev->grab != list)
+ return -EINVAL;
+ input_release_device(&evdev->handle);
+ evdev->grab = NULL;
+ return 0;
+ }
+
+ default:
+
+ if (_IOC_TYPE(cmd) != 'E' || _IOC_DIR(cmd) != _IOC_READ)
+ return -EINVAL;
+
+ if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
+
+ long *bits;
+ int len;
+
+ switch (_IOC_NR(cmd) & EV_MAX) {
+ case 0: bits = dev->evbit; len = EV_MAX; break;
+ case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
+ case EV_REL: bits = dev->relbit; len = REL_MAX; break;
+ case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
+ case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
+ case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
+ case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
+ case EV_FF: bits = dev->ffbit; len = FF_MAX; break;
+ default: return -EINVAL;
+ }
+ len = NBITS(len) * sizeof(long);
+ if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
+ return copy_to_user(p, bits, len) ? -EFAULT : len;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0))) {
+ int len;
+ len = NBITS(KEY_MAX) * sizeof(long);
+ if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
+ return copy_to_user(p, dev->key, len) ? -EFAULT : len;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0))) {
+ int len;
+ len = NBITS(LED_MAX) * sizeof(long);
+ if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
+ return copy_to_user(p, dev->led, len) ? -EFAULT : len;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0))) {
+ int len;
+ len = NBITS(SND_MAX) * sizeof(long);
+ if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
+ return copy_to_user(p, dev->snd, len) ? -EFAULT : len;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0))) {
+ int len;
+ if (!dev->name) return -ENOENT;
+ len = strlen(dev->name) + 1;
+ if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
+ return copy_to_user(p, dev->name, len) ? -EFAULT : len;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0))) {
+ int len;
+ if (!dev->phys) return -ENOENT;
+ len = strlen(dev->phys) + 1;
+ if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
+ return copy_to_user(p, dev->phys, len) ? -EFAULT : len;
+ }
+
+ if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0))) {
+ int len;
+ if (!dev->uniq) return -ENOENT;
+ len = strlen(dev->uniq) + 1;
+ if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
+ return copy_to_user(p, dev->uniq, len) ? -EFAULT : len;
+ }
+
+ if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
+
+ int t = _IOC_NR(cmd) & ABS_MAX;
+
+ abs.value = dev->abs[t];
+ abs.minimum = dev->absmin[t];
+ abs.maximum = dev->absmax[t];
+ abs.fuzz = dev->absfuzz[t];
+ abs.flat = dev->absflat[t];
+
+ if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
+ return -EFAULT;
+
+ return 0;
+ }
+
+ if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
+
+ int t = _IOC_NR(cmd) & ABS_MAX;
+
+ if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
+ return -EFAULT;
+
+ dev->abs[t] = abs.value;
+ dev->absmin[t] = abs.minimum;
+ dev->absmax[t] = abs.maximum;
+ dev->absfuzz[t] = abs.fuzz;
+ dev->absflat[t] = abs.flat;
+
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static struct file_operations evdev_fops = {
+ .owner = THIS_MODULE,
+ .read = evdev_read,
+ .write = evdev_write,
+ .poll = evdev_poll,
+ .open = evdev_open,
+ .release = evdev_release,
+ .ioctl = evdev_ioctl,
+ .fasync = evdev_fasync,
+ .flush = evdev_flush
+};
+
+static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
+{
+ struct evdev *evdev;
+ int minor;
+
+ for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
+ if (minor == EVDEV_MINORS) {
+ printk(KERN_ERR "evdev: no more free evdev devices\n");
+ return NULL;
+ }
+
+ if (!(evdev = kmalloc(sizeof(struct evdev), GFP_KERNEL)))
+ return NULL;
+ memset(evdev, 0, sizeof(struct evdev));
+
+ INIT_LIST_HEAD(&evdev->list);
+ init_waitqueue_head(&evdev->wait);
+
+ evdev->exist = 1;
+ evdev->minor = minor;
+ evdev->handle.dev = dev;
+ evdev->handle.name = evdev->name;
+ evdev->handle.handler = handler;
+ evdev->handle.private = evdev;
+ sprintf(evdev->name, "event%d", minor);
+
+ evdev_table[minor] = evdev;
+
+ devfs_mk_cdev(MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
+ S_IFCHR|S_IRUGO|S_IWUSR, "input/event%d", minor);
+ class_simple_device_add(input_class,
+ MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
+ dev->dev, "event%d", minor);
+
+ return &evdev->handle;
+}
+
+static void evdev_disconnect(struct input_handle *handle)
+{
+ struct evdev *evdev = handle->private;
+ struct evdev_list *list;
+
+ class_simple_device_remove(MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
+ devfs_remove("input/event%d", evdev->minor);
+ evdev->exist = 0;
+
+ if (evdev->open) {
+ input_close_device(handle);
+ wake_up_interruptible(&evdev->wait);
+ list_for_each_entry(list, &evdev->list, node)
+ kill_fasync(&list->fasync, SIGIO, POLL_HUP);
+ } else
+ evdev_free(evdev);
+}
+
+static struct input_device_id evdev_ids[] = {
+ { .driver_info = 1 }, /* Matches all devices */
+ { }, /* Terminating zero entry */
+};
+
+MODULE_DEVICE_TABLE(input, evdev_ids);
+
+static struct input_handler evdev_handler = {
+ .event = evdev_event,
+ .connect = evdev_connect,
+ .disconnect = evdev_disconnect,
+ .fops = &evdev_fops,
+ .minor = EVDEV_MINOR_BASE,
+ .name = "evdev",
+ .id_table = evdev_ids,
+};
+
+static int __init evdev_init(void)
+{
+ input_register_handler(&evdev_handler);
+ return 0;
+}
+
+static void __exit evdev_exit(void)
+{
+ input_unregister_handler(&evdev_handler);
+}
+
+module_init(evdev_init);
+module_exit(evdev_exit);
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("Input driver event char devices");
+MODULE_LICENSE("GPL");