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!

1 files changed, 533 insertions, 0 deletions

diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
new file mode 100644
index 00000000000..7d7527f8b02
--- /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);