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![Ville Ranki](/assets/img/avatar_default.png)
Current implementation of joydev's input_device_id table recognizes only devices with ABS_X, ABS_WHEEL or ABS_THROTTLE axes as joysticks. There are joystick devices that do not have those axes, for example TRC Rudder device. The device in question has ABS_Z, ABS_RX and ABS_RY axes causing it not being detected as joystick. This patch adds ABS_Z to the input_device_id list allowing devices with ABS_Z axis to be detected correctly. Signed-off-by: Ville Ranki <ville.ranki@iki.fi> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
1012 lines
24 KiB
C
1012 lines
24 KiB
C
/*
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* Joystick device driver for the input driver suite.
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*
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* Copyright (c) 1999-2002 Vojtech Pavlik
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* Copyright (c) 1999 Colin Van Dyke
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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
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <asm/io.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/joystick.h>
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#include <linux/input.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/miscdevice.h>
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#include <linux/module.h>
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#include <linux/poll.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/cdev.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Joystick device interfaces");
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MODULE_SUPPORTED_DEVICE("input/js");
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MODULE_LICENSE("GPL");
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#define JOYDEV_MINOR_BASE 0
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#define JOYDEV_MINORS 16
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#define JOYDEV_BUFFER_SIZE 64
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struct joydev {
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int open;
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struct input_handle handle;
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wait_queue_head_t wait;
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struct list_head client_list;
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spinlock_t client_lock; /* protects client_list */
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struct mutex mutex;
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struct device dev;
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struct cdev cdev;
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bool exist;
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struct js_corr corr[ABS_CNT];
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struct JS_DATA_SAVE_TYPE glue;
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int nabs;
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int nkey;
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__u16 keymap[KEY_MAX - BTN_MISC + 1];
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__u16 keypam[KEY_MAX - BTN_MISC + 1];
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__u8 absmap[ABS_CNT];
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__u8 abspam[ABS_CNT];
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__s16 abs[ABS_CNT];
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};
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struct joydev_client {
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struct js_event buffer[JOYDEV_BUFFER_SIZE];
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int head;
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int tail;
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int startup;
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spinlock_t buffer_lock; /* protects access to buffer, head and tail */
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struct fasync_struct *fasync;
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struct joydev *joydev;
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struct list_head node;
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};
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static int joydev_correct(int value, struct js_corr *corr)
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{
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switch (corr->type) {
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case JS_CORR_NONE:
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break;
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case JS_CORR_BROKEN:
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value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
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((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
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((corr->coef[2] * (value - corr->coef[0])) >> 14);
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break;
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default:
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return 0;
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}
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return value < -32767 ? -32767 : (value > 32767 ? 32767 : value);
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}
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static void joydev_pass_event(struct joydev_client *client,
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struct js_event *event)
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{
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struct joydev *joydev = client->joydev;
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/*
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* IRQs already disabled, just acquire the lock
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*/
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spin_lock(&client->buffer_lock);
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client->buffer[client->head] = *event;
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if (client->startup == joydev->nabs + joydev->nkey) {
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client->head++;
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client->head &= JOYDEV_BUFFER_SIZE - 1;
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if (client->tail == client->head)
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client->startup = 0;
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}
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spin_unlock(&client->buffer_lock);
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kill_fasync(&client->fasync, SIGIO, POLL_IN);
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}
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static void joydev_event(struct input_handle *handle,
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unsigned int type, unsigned int code, int value)
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{
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struct joydev *joydev = handle->private;
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struct joydev_client *client;
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struct js_event event;
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switch (type) {
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case EV_KEY:
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if (code < BTN_MISC || value == 2)
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return;
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event.type = JS_EVENT_BUTTON;
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event.number = joydev->keymap[code - BTN_MISC];
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event.value = value;
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break;
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case EV_ABS:
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event.type = JS_EVENT_AXIS;
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event.number = joydev->absmap[code];
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event.value = joydev_correct(value,
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&joydev->corr[event.number]);
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if (event.value == joydev->abs[event.number])
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return;
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joydev->abs[event.number] = event.value;
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break;
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default:
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return;
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}
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event.time = jiffies_to_msecs(jiffies);
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rcu_read_lock();
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list_for_each_entry_rcu(client, &joydev->client_list, node)
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joydev_pass_event(client, &event);
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rcu_read_unlock();
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wake_up_interruptible(&joydev->wait);
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}
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static int joydev_fasync(int fd, struct file *file, int on)
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{
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struct joydev_client *client = file->private_data;
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return fasync_helper(fd, file, on, &client->fasync);
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}
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static void joydev_free(struct device *dev)
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{
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struct joydev *joydev = container_of(dev, struct joydev, dev);
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input_put_device(joydev->handle.dev);
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kfree(joydev);
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}
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static void joydev_attach_client(struct joydev *joydev,
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struct joydev_client *client)
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{
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spin_lock(&joydev->client_lock);
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list_add_tail_rcu(&client->node, &joydev->client_list);
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spin_unlock(&joydev->client_lock);
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}
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static void joydev_detach_client(struct joydev *joydev,
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struct joydev_client *client)
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{
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spin_lock(&joydev->client_lock);
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list_del_rcu(&client->node);
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spin_unlock(&joydev->client_lock);
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synchronize_rcu();
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}
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static int joydev_open_device(struct joydev *joydev)
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{
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int retval;
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retval = mutex_lock_interruptible(&joydev->mutex);
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if (retval)
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return retval;
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if (!joydev->exist)
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retval = -ENODEV;
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else if (!joydev->open++) {
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retval = input_open_device(&joydev->handle);
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if (retval)
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joydev->open--;
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}
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mutex_unlock(&joydev->mutex);
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return retval;
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}
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static void joydev_close_device(struct joydev *joydev)
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{
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mutex_lock(&joydev->mutex);
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if (joydev->exist && !--joydev->open)
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input_close_device(&joydev->handle);
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mutex_unlock(&joydev->mutex);
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}
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/*
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* Wake up users waiting for IO so they can disconnect from
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* dead device.
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*/
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static void joydev_hangup(struct joydev *joydev)
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{
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struct joydev_client *client;
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spin_lock(&joydev->client_lock);
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list_for_each_entry(client, &joydev->client_list, node)
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kill_fasync(&client->fasync, SIGIO, POLL_HUP);
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spin_unlock(&joydev->client_lock);
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wake_up_interruptible(&joydev->wait);
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}
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static int joydev_release(struct inode *inode, struct file *file)
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{
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struct joydev_client *client = file->private_data;
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struct joydev *joydev = client->joydev;
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joydev_detach_client(joydev, client);
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kfree(client);
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joydev_close_device(joydev);
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return 0;
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}
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static int joydev_open(struct inode *inode, struct file *file)
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{
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struct joydev *joydev =
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container_of(inode->i_cdev, struct joydev, cdev);
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struct joydev_client *client;
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int error;
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client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
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if (!client)
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return -ENOMEM;
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spin_lock_init(&client->buffer_lock);
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client->joydev = joydev;
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joydev_attach_client(joydev, client);
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error = joydev_open_device(joydev);
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if (error)
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goto err_free_client;
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file->private_data = client;
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nonseekable_open(inode, file);
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return 0;
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err_free_client:
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joydev_detach_client(joydev, client);
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kfree(client);
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return error;
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}
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static int joydev_generate_startup_event(struct joydev_client *client,
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struct input_dev *input,
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struct js_event *event)
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{
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struct joydev *joydev = client->joydev;
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int have_event;
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spin_lock_irq(&client->buffer_lock);
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have_event = client->startup < joydev->nabs + joydev->nkey;
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if (have_event) {
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event->time = jiffies_to_msecs(jiffies);
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if (client->startup < joydev->nkey) {
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event->type = JS_EVENT_BUTTON | JS_EVENT_INIT;
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event->number = client->startup;
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event->value = !!test_bit(joydev->keypam[event->number],
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input->key);
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} else {
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event->type = JS_EVENT_AXIS | JS_EVENT_INIT;
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event->number = client->startup - joydev->nkey;
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event->value = joydev->abs[event->number];
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}
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client->startup++;
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}
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spin_unlock_irq(&client->buffer_lock);
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return have_event;
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}
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static int joydev_fetch_next_event(struct joydev_client *client,
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struct js_event *event)
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{
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int have_event;
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spin_lock_irq(&client->buffer_lock);
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have_event = client->head != client->tail;
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if (have_event) {
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*event = client->buffer[client->tail++];
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client->tail &= JOYDEV_BUFFER_SIZE - 1;
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}
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spin_unlock_irq(&client->buffer_lock);
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return have_event;
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}
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/*
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* Old joystick interface
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*/
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static ssize_t joydev_0x_read(struct joydev_client *client,
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struct input_dev *input,
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char __user *buf)
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{
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struct joydev *joydev = client->joydev;
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struct JS_DATA_TYPE data;
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int i;
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spin_lock_irq(&input->event_lock);
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/*
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* Get device state
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*/
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for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
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data.buttons |=
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test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
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data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
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data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
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/*
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* Reset reader's event queue
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*/
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spin_lock(&client->buffer_lock);
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client->startup = 0;
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client->tail = client->head;
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spin_unlock(&client->buffer_lock);
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spin_unlock_irq(&input->event_lock);
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if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
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return -EFAULT;
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return sizeof(struct JS_DATA_TYPE);
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}
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static inline int joydev_data_pending(struct joydev_client *client)
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{
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struct joydev *joydev = client->joydev;
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return client->startup < joydev->nabs + joydev->nkey ||
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client->head != client->tail;
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}
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static ssize_t joydev_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct joydev_client *client = file->private_data;
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struct joydev *joydev = client->joydev;
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struct input_dev *input = joydev->handle.dev;
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struct js_event event;
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int retval;
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if (!joydev->exist)
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return -ENODEV;
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if (count < sizeof(struct js_event))
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return -EINVAL;
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if (count == sizeof(struct JS_DATA_TYPE))
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return joydev_0x_read(client, input, buf);
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if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK))
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return -EAGAIN;
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retval = wait_event_interruptible(joydev->wait,
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!joydev->exist || joydev_data_pending(client));
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if (retval)
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return retval;
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if (!joydev->exist)
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return -ENODEV;
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while (retval + sizeof(struct js_event) <= count &&
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joydev_generate_startup_event(client, input, &event)) {
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if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
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return -EFAULT;
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retval += sizeof(struct js_event);
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}
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while (retval + sizeof(struct js_event) <= count &&
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joydev_fetch_next_event(client, &event)) {
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if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
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return -EFAULT;
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retval += sizeof(struct js_event);
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}
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return retval;
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}
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/* No kernel lock - fine */
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static unsigned int joydev_poll(struct file *file, poll_table *wait)
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{
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struct joydev_client *client = file->private_data;
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struct joydev *joydev = client->joydev;
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poll_wait(file, &joydev->wait, wait);
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return (joydev_data_pending(client) ? (POLLIN | POLLRDNORM) : 0) |
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(joydev->exist ? 0 : (POLLHUP | POLLERR));
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}
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static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev,
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void __user *argp, size_t len)
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{
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__u8 *abspam;
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int i;
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int retval = 0;
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len = min(len, sizeof(joydev->abspam));
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/* Validate the map. */
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abspam = memdup_user(argp, len);
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if (IS_ERR(abspam))
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return PTR_ERR(abspam);
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for (i = 0; i < joydev->nabs; i++) {
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if (abspam[i] > ABS_MAX) {
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retval = -EINVAL;
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goto out;
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}
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}
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memcpy(joydev->abspam, abspam, len);
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for (i = 0; i < joydev->nabs; i++)
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joydev->absmap[joydev->abspam[i]] = i;
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out:
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kfree(abspam);
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return retval;
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}
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static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev,
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void __user *argp, size_t len)
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{
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__u16 *keypam;
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int i;
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int retval = 0;
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len = min(len, sizeof(joydev->keypam));
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|
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/* Validate the map. */
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keypam = memdup_user(argp, len);
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if (IS_ERR(keypam))
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return PTR_ERR(keypam);
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for (i = 0; i < joydev->nkey; i++) {
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if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) {
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retval = -EINVAL;
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goto out;
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}
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}
|
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memcpy(joydev->keypam, keypam, len);
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for (i = 0; i < joydev->nkey; i++)
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joydev->keymap[keypam[i] - BTN_MISC] = i;
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out:
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kfree(keypam);
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return retval;
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}
|
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|
|
|
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static int joydev_ioctl_common(struct joydev *joydev,
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unsigned int cmd, void __user *argp)
|
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{
|
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struct input_dev *dev = joydev->handle.dev;
|
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size_t len;
|
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int i;
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const char *name;
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|
|
/* Process fixed-sized commands. */
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switch (cmd) {
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|
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case JS_SET_CAL:
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return copy_from_user(&joydev->glue.JS_CORR, argp,
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sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
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|
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case JS_GET_CAL:
|
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return copy_to_user(argp, &joydev->glue.JS_CORR,
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sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
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|
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case JS_SET_TIMEOUT:
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return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
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case JS_GET_TIMEOUT:
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return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
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|
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case JSIOCGVERSION:
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return put_user(JS_VERSION, (__u32 __user *) argp);
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case JSIOCGAXES:
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return put_user(joydev->nabs, (__u8 __user *) argp);
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|
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case JSIOCGBUTTONS:
|
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return put_user(joydev->nkey, (__u8 __user *) argp);
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|
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case JSIOCSCORR:
|
|
if (copy_from_user(joydev->corr, argp,
|
|
sizeof(joydev->corr[0]) * joydev->nabs))
|
|
return -EFAULT;
|
|
|
|
for (i = 0; i < joydev->nabs; i++) {
|
|
int val = input_abs_get_val(dev, joydev->abspam[i]);
|
|
joydev->abs[i] = joydev_correct(val, &joydev->corr[i]);
|
|
}
|
|
return 0;
|
|
|
|
case JSIOCGCORR:
|
|
return copy_to_user(argp, joydev->corr,
|
|
sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* Process variable-sized commands (the axis and button map commands
|
|
* are considered variable-sized to decouple them from the values of
|
|
* ABS_MAX and KEY_MAX).
|
|
*/
|
|
switch (cmd & ~IOCSIZE_MASK) {
|
|
|
|
case (JSIOCSAXMAP & ~IOCSIZE_MASK):
|
|
return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd));
|
|
|
|
case (JSIOCGAXMAP & ~IOCSIZE_MASK):
|
|
len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam));
|
|
return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len;
|
|
|
|
case (JSIOCSBTNMAP & ~IOCSIZE_MASK):
|
|
return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd));
|
|
|
|
case (JSIOCGBTNMAP & ~IOCSIZE_MASK):
|
|
len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam));
|
|
return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len;
|
|
|
|
case JSIOCGNAME(0):
|
|
name = dev->name;
|
|
if (!name)
|
|
return 0;
|
|
|
|
len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1);
|
|
return copy_to_user(argp, name, len) ? -EFAULT : len;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static long joydev_compat_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct joydev_client *client = file->private_data;
|
|
struct joydev *joydev = client->joydev;
|
|
void __user *argp = (void __user *)arg;
|
|
s32 tmp32;
|
|
struct JS_DATA_SAVE_TYPE_32 ds32;
|
|
int retval;
|
|
|
|
retval = mutex_lock_interruptible(&joydev->mutex);
|
|
if (retval)
|
|
return retval;
|
|
|
|
if (!joydev->exist) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
case JS_SET_TIMELIMIT:
|
|
retval = get_user(tmp32, (s32 __user *) arg);
|
|
if (retval == 0)
|
|
joydev->glue.JS_TIMELIMIT = tmp32;
|
|
break;
|
|
|
|
case JS_GET_TIMELIMIT:
|
|
tmp32 = joydev->glue.JS_TIMELIMIT;
|
|
retval = put_user(tmp32, (s32 __user *) arg);
|
|
break;
|
|
|
|
case JS_SET_ALL:
|
|
retval = copy_from_user(&ds32, argp,
|
|
sizeof(ds32)) ? -EFAULT : 0;
|
|
if (retval == 0) {
|
|
joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT;
|
|
joydev->glue.BUSY = ds32.BUSY;
|
|
joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
|
|
joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT;
|
|
joydev->glue.JS_SAVE = ds32.JS_SAVE;
|
|
joydev->glue.JS_CORR = ds32.JS_CORR;
|
|
}
|
|
break;
|
|
|
|
case JS_GET_ALL:
|
|
ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT;
|
|
ds32.BUSY = joydev->glue.BUSY;
|
|
ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
|
|
ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT;
|
|
ds32.JS_SAVE = joydev->glue.JS_SAVE;
|
|
ds32.JS_CORR = joydev->glue.JS_CORR;
|
|
|
|
retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
|
|
break;
|
|
|
|
default:
|
|
retval = joydev_ioctl_common(joydev, cmd, argp);
|
|
break;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&joydev->mutex);
|
|
return retval;
|
|
}
|
|
#endif /* CONFIG_COMPAT */
|
|
|
|
static long joydev_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct joydev_client *client = file->private_data;
|
|
struct joydev *joydev = client->joydev;
|
|
void __user *argp = (void __user *)arg;
|
|
int retval;
|
|
|
|
retval = mutex_lock_interruptible(&joydev->mutex);
|
|
if (retval)
|
|
return retval;
|
|
|
|
if (!joydev->exist) {
|
|
retval = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
case JS_SET_TIMELIMIT:
|
|
retval = get_user(joydev->glue.JS_TIMELIMIT,
|
|
(long __user *) arg);
|
|
break;
|
|
|
|
case JS_GET_TIMELIMIT:
|
|
retval = put_user(joydev->glue.JS_TIMELIMIT,
|
|
(long __user *) arg);
|
|
break;
|
|
|
|
case JS_SET_ALL:
|
|
retval = copy_from_user(&joydev->glue, argp,
|
|
sizeof(joydev->glue)) ? -EFAULT : 0;
|
|
break;
|
|
|
|
case JS_GET_ALL:
|
|
retval = copy_to_user(argp, &joydev->glue,
|
|
sizeof(joydev->glue)) ? -EFAULT : 0;
|
|
break;
|
|
|
|
default:
|
|
retval = joydev_ioctl_common(joydev, cmd, argp);
|
|
break;
|
|
}
|
|
out:
|
|
mutex_unlock(&joydev->mutex);
|
|
return retval;
|
|
}
|
|
|
|
static const struct file_operations joydev_fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = joydev_read,
|
|
.poll = joydev_poll,
|
|
.open = joydev_open,
|
|
.release = joydev_release,
|
|
.unlocked_ioctl = joydev_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = joydev_compat_ioctl,
|
|
#endif
|
|
.fasync = joydev_fasync,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
/*
|
|
* Mark device non-existent. This disables writes, ioctls and
|
|
* prevents new users from opening the device. Already posted
|
|
* blocking reads will stay, however new ones will fail.
|
|
*/
|
|
static void joydev_mark_dead(struct joydev *joydev)
|
|
{
|
|
mutex_lock(&joydev->mutex);
|
|
joydev->exist = false;
|
|
mutex_unlock(&joydev->mutex);
|
|
}
|
|
|
|
static void joydev_cleanup(struct joydev *joydev)
|
|
{
|
|
struct input_handle *handle = &joydev->handle;
|
|
|
|
joydev_mark_dead(joydev);
|
|
joydev_hangup(joydev);
|
|
|
|
cdev_del(&joydev->cdev);
|
|
|
|
/* joydev is marked dead so no one else accesses joydev->open */
|
|
if (joydev->open)
|
|
input_close_device(handle);
|
|
}
|
|
|
|
static bool joydev_dev_is_absolute_mouse(struct input_dev *dev)
|
|
{
|
|
DECLARE_BITMAP(jd_scratch, KEY_CNT);
|
|
|
|
BUILD_BUG_ON(ABS_CNT > KEY_CNT || EV_CNT > KEY_CNT);
|
|
|
|
/*
|
|
* Virtualization (VMware, etc) and remote management (HP
|
|
* ILO2) solutions use absolute coordinates for their virtual
|
|
* pointing devices so that there is one-to-one relationship
|
|
* between pointer position on the host screen and virtual
|
|
* guest screen, and so their mice use ABS_X, ABS_Y and 3
|
|
* primary button events. This clashes with what joydev
|
|
* considers to be joysticks (a device with at minimum ABS_X
|
|
* axis).
|
|
*
|
|
* Here we are trying to separate absolute mice from
|
|
* joysticks. A device is, for joystick detection purposes,
|
|
* considered to be an absolute mouse if the following is
|
|
* true:
|
|
*
|
|
* 1) Event types are exactly EV_ABS, EV_KEY and EV_SYN.
|
|
* 2) Absolute events are exactly ABS_X and ABS_Y.
|
|
* 3) Keys are exactly BTN_LEFT, BTN_RIGHT and BTN_MIDDLE.
|
|
* 4) Device is not on "Amiga" bus.
|
|
*/
|
|
|
|
bitmap_zero(jd_scratch, EV_CNT);
|
|
__set_bit(EV_ABS, jd_scratch);
|
|
__set_bit(EV_KEY, jd_scratch);
|
|
__set_bit(EV_SYN, jd_scratch);
|
|
if (!bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
|
|
return false;
|
|
|
|
bitmap_zero(jd_scratch, ABS_CNT);
|
|
__set_bit(ABS_X, jd_scratch);
|
|
__set_bit(ABS_Y, jd_scratch);
|
|
if (!bitmap_equal(dev->absbit, jd_scratch, ABS_CNT))
|
|
return false;
|
|
|
|
bitmap_zero(jd_scratch, KEY_CNT);
|
|
__set_bit(BTN_LEFT, jd_scratch);
|
|
__set_bit(BTN_RIGHT, jd_scratch);
|
|
__set_bit(BTN_MIDDLE, jd_scratch);
|
|
|
|
if (!bitmap_equal(dev->keybit, jd_scratch, KEY_CNT))
|
|
return false;
|
|
|
|
/*
|
|
* Amiga joystick (amijoy) historically uses left/middle/right
|
|
* button events.
|
|
*/
|
|
if (dev->id.bustype == BUS_AMIGA)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool joydev_match(struct input_handler *handler, struct input_dev *dev)
|
|
{
|
|
/* Avoid touchpads and touchscreens */
|
|
if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit))
|
|
return false;
|
|
|
|
/* Avoid tablets, digitisers and similar devices */
|
|
if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit))
|
|
return false;
|
|
|
|
/* Avoid absolute mice */
|
|
if (joydev_dev_is_absolute_mouse(dev))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
|
|
const struct input_device_id *id)
|
|
{
|
|
struct joydev *joydev;
|
|
int i, j, t, minor, dev_no;
|
|
int error;
|
|
|
|
minor = input_get_new_minor(JOYDEV_MINOR_BASE, JOYDEV_MINORS, true);
|
|
if (minor < 0) {
|
|
error = minor;
|
|
pr_err("failed to reserve new minor: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
|
|
if (!joydev) {
|
|
error = -ENOMEM;
|
|
goto err_free_minor;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&joydev->client_list);
|
|
spin_lock_init(&joydev->client_lock);
|
|
mutex_init(&joydev->mutex);
|
|
init_waitqueue_head(&joydev->wait);
|
|
joydev->exist = true;
|
|
|
|
dev_no = minor;
|
|
/* Normalize device number if it falls into legacy range */
|
|
if (dev_no < JOYDEV_MINOR_BASE + JOYDEV_MINORS)
|
|
dev_no -= JOYDEV_MINOR_BASE;
|
|
dev_set_name(&joydev->dev, "js%d", dev_no);
|
|
|
|
joydev->handle.dev = input_get_device(dev);
|
|
joydev->handle.name = dev_name(&joydev->dev);
|
|
joydev->handle.handler = handler;
|
|
joydev->handle.private = joydev;
|
|
|
|
for_each_set_bit(i, dev->absbit, ABS_CNT) {
|
|
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; 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 (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) {
|
|
joydev->corr[i].type = JS_CORR_NONE;
|
|
joydev->abs[i] = input_abs_get_val(dev, j);
|
|
continue;
|
|
}
|
|
joydev->corr[i].type = JS_CORR_BROKEN;
|
|
joydev->corr[i].prec = input_abs_get_fuzz(dev, j);
|
|
|
|
t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2;
|
|
joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j);
|
|
joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j);
|
|
|
|
t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2
|
|
- 2 * input_abs_get_flat(dev, j);
|
|
if (t) {
|
|
joydev->corr[i].coef[2] = (1 << 29) / t;
|
|
joydev->corr[i].coef[3] = (1 << 29) / t;
|
|
|
|
joydev->abs[i] =
|
|
joydev_correct(input_abs_get_val(dev, j),
|
|
joydev->corr + i);
|
|
}
|
|
}
|
|
|
|
joydev->dev.devt = MKDEV(INPUT_MAJOR, minor);
|
|
joydev->dev.class = &input_class;
|
|
joydev->dev.parent = &dev->dev;
|
|
joydev->dev.release = joydev_free;
|
|
device_initialize(&joydev->dev);
|
|
|
|
error = input_register_handle(&joydev->handle);
|
|
if (error)
|
|
goto err_free_joydev;
|
|
|
|
cdev_init(&joydev->cdev, &joydev_fops);
|
|
joydev->cdev.kobj.parent = &joydev->dev.kobj;
|
|
error = cdev_add(&joydev->cdev, joydev->dev.devt, 1);
|
|
if (error)
|
|
goto err_unregister_handle;
|
|
|
|
error = device_add(&joydev->dev);
|
|
if (error)
|
|
goto err_cleanup_joydev;
|
|
|
|
return 0;
|
|
|
|
err_cleanup_joydev:
|
|
joydev_cleanup(joydev);
|
|
err_unregister_handle:
|
|
input_unregister_handle(&joydev->handle);
|
|
err_free_joydev:
|
|
put_device(&joydev->dev);
|
|
err_free_minor:
|
|
input_free_minor(minor);
|
|
return error;
|
|
}
|
|
|
|
static void joydev_disconnect(struct input_handle *handle)
|
|
{
|
|
struct joydev *joydev = handle->private;
|
|
|
|
device_del(&joydev->dev);
|
|
joydev_cleanup(joydev);
|
|
input_free_minor(MINOR(joydev->dev.devt));
|
|
input_unregister_handle(handle);
|
|
put_device(&joydev->dev);
|
|
}
|
|
|
|
static const struct input_device_id joydev_ids[] = {
|
|
{
|
|
.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
|
|
INPUT_DEVICE_ID_MATCH_ABSBIT,
|
|
.evbit = { BIT_MASK(EV_ABS) },
|
|
.absbit = { BIT_MASK(ABS_X) },
|
|
},
|
|
{
|
|
.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
|
|
INPUT_DEVICE_ID_MATCH_ABSBIT,
|
|
.evbit = { BIT_MASK(EV_ABS) },
|
|
.absbit = { BIT_MASK(ABS_Z) },
|
|
},
|
|
{
|
|
.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
|
|
INPUT_DEVICE_ID_MATCH_ABSBIT,
|
|
.evbit = { BIT_MASK(EV_ABS) },
|
|
.absbit = { BIT_MASK(ABS_WHEEL) },
|
|
},
|
|
{
|
|
.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
|
|
INPUT_DEVICE_ID_MATCH_ABSBIT,
|
|
.evbit = { BIT_MASK(EV_ABS) },
|
|
.absbit = { BIT_MASK(ABS_THROTTLE) },
|
|
},
|
|
{
|
|
.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
|
|
INPUT_DEVICE_ID_MATCH_KEYBIT,
|
|
.evbit = { BIT_MASK(EV_KEY) },
|
|
.keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) },
|
|
},
|
|
{
|
|
.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
|
|
INPUT_DEVICE_ID_MATCH_KEYBIT,
|
|
.evbit = { BIT_MASK(EV_KEY) },
|
|
.keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) },
|
|
},
|
|
{
|
|
.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
|
|
INPUT_DEVICE_ID_MATCH_KEYBIT,
|
|
.evbit = { BIT_MASK(EV_KEY) },
|
|
.keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) },
|
|
},
|
|
{ } /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(input, joydev_ids);
|
|
|
|
static struct input_handler joydev_handler = {
|
|
.event = joydev_event,
|
|
.match = joydev_match,
|
|
.connect = joydev_connect,
|
|
.disconnect = joydev_disconnect,
|
|
.legacy_minors = true,
|
|
.minor = JOYDEV_MINOR_BASE,
|
|
.name = "joydev",
|
|
.id_table = joydev_ids,
|
|
};
|
|
|
|
static int __init joydev_init(void)
|
|
{
|
|
return input_register_handler(&joydev_handler);
|
|
}
|
|
|
|
static void __exit joydev_exit(void)
|
|
{
|
|
input_unregister_handler(&joydev_handler);
|
|
}
|
|
|
|
module_init(joydev_init);
|
|
module_exit(joydev_exit);
|