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/joydev.c b/drivers/input/joydev.c
new file mode 100644
index 0000000..7d7527f
--- /dev/null
+++ b/drivers/input/joydev.c
@@ -0,0 +1,533 @@
+/*
+ * Joystick device driver for the input driver suite.
+ *
+ * Copyright (c) 1999-2002 Vojtech Pavlik
+ * Copyright (c) 1999 Colin Van Dyke
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * 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.
+ */
+
+#include <asm/io.h>
+#include <asm/system.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/joystick.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/poll.h>
+#include <linux/init.h>
+#include <linux/smp_lock.h>
+#include <linux/device.h>
+#include <linux/devfs_fs_kernel.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("Joystick device interfaces");
+MODULE_SUPPORTED_DEVICE("input/js");
+MODULE_LICENSE("GPL");
+
+#define JOYDEV_MINOR_BASE 0
+#define JOYDEV_MINORS 16
+#define JOYDEV_BUFFER_SIZE 64
+
+#define MSECS(t) (1000 * ((t) / HZ) + 1000 * ((t) % HZ) / HZ)
+
+struct joydev {
+ int exist;
+ int open;
+ int minor;
+ char name[16];
+ struct input_handle handle;
+ wait_queue_head_t wait;
+ struct list_head list;
+ struct js_corr corr[ABS_MAX + 1];
+ struct JS_DATA_SAVE_TYPE glue;
+ int nabs;
+ int nkey;
+ __u16 keymap[KEY_MAX - BTN_MISC + 1];
+ __u16 keypam[KEY_MAX - BTN_MISC + 1];
+ __u8 absmap[ABS_MAX + 1];
+ __u8 abspam[ABS_MAX + 1];
+ __s16 abs[ABS_MAX + 1];
+};
+
+struct joydev_list {
+ struct js_event buffer[JOYDEV_BUFFER_SIZE];
+ int head;
+ int tail;
+ int startup;
+ struct fasync_struct *fasync;
+ struct joydev *joydev;
+ struct list_head node;
+};
+
+static struct joydev *joydev_table[JOYDEV_MINORS];
+
+static int joydev_correct(int value, struct js_corr *corr)
+{
+ switch (corr->type) {
+ case JS_CORR_NONE:
+ break;
+ case JS_CORR_BROKEN:
+ value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
+ ((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
+ ((corr->coef[2] * (value - corr->coef[0])) >> 14);
+ break;
+ default:
+ return 0;
+ }
+
+ if (value < -32767) return -32767;
+ if (value > 32767) return 32767;
+
+ return value;
+}
+
+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 js_event event;
+
+ switch (type) {
+
+ case EV_KEY:
+ if (code < BTN_MISC || value == 2) return;
+ event.type = JS_EVENT_BUTTON;
+ event.number = joydev->keymap[code - BTN_MISC];
+ event.value = value;
+ break;
+
+ case EV_ABS:
+ event.type = JS_EVENT_AXIS;
+ event.number = joydev->absmap[code];
+ event.value = joydev_correct(value, joydev->corr + event.number);
+ if (event.value == joydev->abs[event.number]) return;
+ joydev->abs[event.number] = event.value;
+ break;
+
+ default:
+ return;
+ }
+
+ event.time = MSECS(jiffies);
+
+ list_for_each_entry(list, &joydev->list, node) {
+
+ memcpy(list->buffer + list->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;
+
+ kill_fasync(&list->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;
+ retval = fasync_helper(fd, file, on, &list->fasync);
+ return retval < 0 ? retval : 0;
+}
+
+static void joydev_free(struct joydev *joydev)
+{
+ joydev_table[joydev->minor] = NULL;
+ kfree(joydev);
+}
+
+static int joydev_release(struct inode * inode, struct file * file)
+{
+ struct joydev_list *list = file->private_data;
+
+ joydev_fasync(-1, file, 0);
+
+ list_del(&list->node);
+
+ if (!--list->joydev->open) {
+ if (list->joydev->exist)
+ input_close_device(&list->joydev->handle);
+ else
+ joydev_free(list->joydev);
+ }
+
+ kfree(list);
+ return 0;
+}
+
+static int joydev_open(struct inode *inode, struct file *file)
+{
+ struct joydev_list *list;
+ int i = iminor(inode) - JOYDEV_MINOR_BASE;
+
+ if (i >= JOYDEV_MINORS || !joydev_table[i])
+ return -ENODEV;
+
+ if (!(list = kmalloc(sizeof(struct joydev_list), GFP_KERNEL)))
+ return -ENOMEM;
+ memset(list, 0, sizeof(struct joydev_list));
+
+ list->joydev = joydev_table[i];
+ list_add_tail(&list->node, &joydev_table[i]->list);
+ file->private_data = list;
+
+ if (!list->joydev->open++)
+ if (list->joydev->exist)
+ input_open_device(&list->joydev->handle);
+
+ return 0;
+}
+
+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 input_dev *input = joydev->handle.dev;
+ int retval = 0;
+
+ if (!list->joydev->exist)
+ return -ENODEV;
+
+ if (count < sizeof(struct js_event))
+ return -EINVAL;
+
+ if (count == sizeof(struct JS_DATA_TYPE)) {
+
+ struct JS_DATA_TYPE data;
+ int i;
+
+ for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
+ data.buttons |= test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
+ data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
+ data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
+
+ if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
+ return -EFAULT;
+
+ list->startup = 0;
+ list->tail = list->head;
+
+ return sizeof(struct JS_DATA_TYPE);
+ }
+
+ if (list->startup == joydev->nabs + joydev->nkey
+ && list->head == list->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);
+
+ if (retval)
+ return retval;
+
+ if (!list->joydev->exist)
+ return -ENODEV;
+
+ while (list->startup < joydev->nabs + joydev->nkey && retval + sizeof(struct js_event) <= count) {
+
+ struct js_event event;
+
+ event.time = MSECS(jiffies);
+
+ if (list->startup < joydev->nkey) {
+ event.type = JS_EVENT_BUTTON | JS_EVENT_INIT;
+ event.number = list->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.value = joydev->abs[event.number];
+ }
+
+ if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
+ return -EFAULT;
+
+ list->startup++;
+ retval += sizeof(struct js_event);
+ }
+
+ while (list->head != list->tail && retval + sizeof(struct js_event) <= count) {
+
+ if (copy_to_user(buf + retval, list->buffer + list->tail, sizeof(struct js_event)))
+ return -EFAULT;
+
+ list->tail = (list->tail + 1) & (JOYDEV_BUFFER_SIZE - 1);
+ retval += sizeof(struct js_event);
+ }
+
+ return retval;
+}
+
+/* No kernel lock - fine */
+static unsigned int joydev_poll(struct file *file, poll_table *wait)
+{
+ struct joydev_list *list = file->private_data;
+ 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));
+}
+
+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 input_dev *dev = joydev->handle.dev;
+ void __user *argp = (void __user *)arg;
+ int i, j;
+
+ if (!joydev->exist) return -ENODEV;
+
+ switch (cmd) {
+
+ case JS_SET_CAL:
+ return copy_from_user(&joydev->glue.JS_CORR, argp,
+ sizeof(struct JS_DATA_TYPE)) ? -EFAULT : 0;
+ case JS_GET_CAL:
+ return copy_to_user(argp, &joydev->glue.JS_CORR,
+ sizeof(struct JS_DATA_TYPE)) ? -EFAULT : 0;
+ case JS_SET_TIMEOUT:
+ return get_user(joydev->glue.JS_TIMEOUT, (int __user *) arg);
+ case JS_GET_TIMEOUT:
+ return put_user(joydev->glue.JS_TIMEOUT, (int __user *) arg);
+ case JS_SET_TIMELIMIT:
+ return get_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
+ case JS_GET_TIMELIMIT:
+ return put_user(joydev->glue.JS_TIMELIMIT, (long __user *) arg);
+ case JS_SET_ALL:
+ return copy_from_user(&joydev->glue, argp,
+ sizeof(struct JS_DATA_SAVE_TYPE)) ? -EFAULT : 0;
+ case JS_GET_ALL:
+ return copy_to_user(argp, &joydev->glue,
+ sizeof(struct JS_DATA_SAVE_TYPE)) ? -EFAULT : 0;
+
+ case JSIOCGVERSION:
+ return put_user(JS_VERSION, (__u32 __user *) arg);
+ case JSIOCGAXES:
+ return put_user(joydev->nabs, (__u8 __user *) arg);
+ case JSIOCGBUTTONS:
+ return put_user(joydev->nkey, (__u8 __user *) arg);
+ case JSIOCSCORR:
+ if (copy_from_user(joydev->corr, argp,
+ sizeof(struct js_corr) * joydev->nabs))
+ return -EFAULT;
+ for (i = 0; i < joydev->nabs; i++) {
+ j = joydev->abspam[i];
+ joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
+ }
+ return 0;
+ case JSIOCGCORR:
+ return copy_to_user(argp, joydev->corr,
+ sizeof(struct js_corr) * joydev->nabs) ? -EFAULT : 0;
+ case JSIOCSAXMAP:
+ if (copy_from_user(joydev->abspam, argp, sizeof(__u8) * (ABS_MAX + 1)))
+ return -EFAULT;
+ for (i = 0; i < joydev->nabs; i++) {
+ if (joydev->abspam[i] > ABS_MAX) return -EINVAL;
+ joydev->absmap[joydev->abspam[i]] = i;
+ }
+ return 0;
+ case JSIOCGAXMAP:
+ return copy_to_user(argp, joydev->abspam,
+ sizeof(__u8) * (ABS_MAX + 1)) ? -EFAULT : 0;
+ case JSIOCSBTNMAP:
+ if (copy_from_user(joydev->keypam, argp, sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)))
+ return -EFAULT;
+ for (i = 0; i < joydev->nkey; i++) {
+ if (joydev->keypam[i] > KEY_MAX || joydev->keypam[i] < BTN_MISC) return -EINVAL;
+ joydev->keymap[joydev->keypam[i] - BTN_MISC] = i;
+ }
+ return 0;
+ case JSIOCGBTNMAP:
+ return copy_to_user(argp, joydev->keypam,
+ sizeof(__u16) * (KEY_MAX - BTN_MISC + 1)) ? -EFAULT : 0;
+ default:
+ if ((cmd & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) == JSIOCGNAME(0)) {
+ int len;
+ if (!dev->name) return 0;
+ len = strlen(dev->name) + 1;
+ if (len > _IOC_SIZE(cmd)) len = _IOC_SIZE(cmd);
+ if (copy_to_user(argp, dev->name, len)) return -EFAULT;
+ return len;
+ }
+ }
+ return -EINVAL;
+}
+
+static struct file_operations joydev_fops = {
+ .owner = THIS_MODULE,
+ .read = joydev_read,
+ .write = joydev_write,
+ .poll = joydev_poll,
+ .open = joydev_open,
+ .release = joydev_release,
+ .ioctl = joydev_ioctl,
+ .fasync = joydev_fasync,
+};
+
+static struct input_handle *joydev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
+{
+ struct joydev *joydev;
+ int i, j, t, minor;
+
+ 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;
+ }
+
+ if (!(joydev = kmalloc(sizeof(struct joydev), GFP_KERNEL)))
+ return NULL;
+ memset(joydev, 0, sizeof(struct joydev));
+
+ INIT_LIST_HEAD(&joydev->list);
+ init_waitqueue_head(&joydev->wait);
+
+ joydev->minor = minor;
+ joydev->exist = 1;
+ joydev->handle.dev = dev;
+ joydev->handle.name = joydev->name;
+ joydev->handle.handler = handler;
+ joydev->handle.private = joydev;
+ sprintf(joydev->name, "js%d", minor);
+
+ for (i = 0; i < ABS_MAX + 1; i++)
+ if (test_bit(i, dev->absbit)) {
+ joydev->absmap[i] = joydev->nabs;
+ joydev->abspam[joydev->nabs] = i;
+ joydev->nabs++;
+ }
+
+ for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
+ if (test_bit(i + BTN_MISC, dev->keybit)) {
+ joydev->keymap[i] = joydev->nkey;
+ joydev->keypam[joydev->nkey] = i + BTN_MISC;
+ joydev->nkey++;
+ }
+
+ for (i = 0; i < BTN_JOYSTICK - BTN_MISC + 1; i++)
+ if (test_bit(i + BTN_MISC, dev->keybit)) {
+ joydev->keymap[i] = joydev->nkey;
+ joydev->keypam[joydev->nkey] = i + BTN_MISC;
+ joydev->nkey++;
+ }
+
+ for (i = 0; i < joydev->nabs; i++) {
+ j = joydev->abspam[i];
+ if (dev->absmax[j] == dev->absmin[j]) {
+ joydev->corr[i].type = JS_CORR_NONE;
+ joydev->abs[i] = dev->abs[j];
+ continue;
+ }
+ joydev->corr[i].type = JS_CORR_BROKEN;
+ joydev->corr[i].prec = dev->absfuzz[j];
+ joydev->corr[i].coef[0] = (dev->absmax[j] + dev->absmin[j]) / 2 - dev->absflat[j];
+ joydev->corr[i].coef[1] = (dev->absmax[j] + dev->absmin[j]) / 2 + dev->absflat[j];
+ if (!(t = ((dev->absmax[j] - dev->absmin[j]) / 2 - 2 * dev->absflat[j])))
+ continue;
+ joydev->corr[i].coef[2] = (1 << 29) / t;
+ joydev->corr[i].coef[3] = (1 << 29) / t;
+
+ joydev->abs[i] = joydev_correct(dev->abs[j], joydev->corr + i);
+ }
+
+ joydev_table[minor] = joydev;
+
+ devfs_mk_cdev(MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor),
+ S_IFCHR|S_IRUGO|S_IWUSR, "input/js%d", minor);
+ class_simple_device_add(input_class,
+ MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor),
+ dev->dev, "js%d", minor);
+
+ return &joydev->handle;
+}
+
+static void joydev_disconnect(struct input_handle *handle)
+{
+ struct joydev *joydev = handle->private;
+ struct joydev_list *list;
+
+ class_simple_device_remove(MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + joydev->minor));
+ devfs_remove("input/js%d", joydev->minor);
+ joydev->exist = 0;
+
+ if (joydev->open) {
+ input_close_device(handle);
+ wake_up_interruptible(&joydev->wait);
+ list_for_each_entry(list, &joydev->list, node)
+ kill_fasync(&list->fasync, SIGIO, POLL_HUP);
+ } else
+ joydev_free(joydev);
+}
+
+static struct input_device_id joydev_blacklist[] = {
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+ .evbit = { BIT(EV_KEY) },
+ .keybit = { [LONG(BTN_TOUCH)] = BIT(BTN_TOUCH) },
+ }, /* Avoid itouchpads, touchscreens and tablets */
+ { }, /* Terminating entry */
+};
+
+static struct input_device_id joydev_ids[] = {
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
+ .evbit = { BIT(EV_ABS) },
+ .absbit = { BIT(ABS_X) },
+ },
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
+ .evbit = { BIT(EV_ABS) },
+ .absbit = { BIT(ABS_WHEEL) },
+ },
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_ABSBIT,
+ .evbit = { BIT(EV_ABS) },
+ .absbit = { BIT(ABS_THROTTLE) },
+ },
+ { }, /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(input, joydev_ids);
+
+static struct input_handler joydev_handler = {
+ .event = joydev_event,
+ .connect = joydev_connect,
+ .disconnect = joydev_disconnect,
+ .fops = &joydev_fops,
+ .minor = JOYDEV_MINOR_BASE,
+ .name = "joydev",
+ .id_table = joydev_ids,
+ .blacklist = joydev_blacklist,
+};
+
+static int __init joydev_init(void)
+{
+ input_register_handler(&joydev_handler);
+ return 0;
+}
+
+static void __exit joydev_exit(void)
+{
+ input_unregister_handler(&joydev_handler);
+}
+
+module_init(joydev_init);
+module_exit(joydev_exit);