^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Joystick device driver for the input driver suite.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 1999-2002 Vojtech Pavlik
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 1999 Colin Van Dyke
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/joystick.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/major.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/cdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) MODULE_DESCRIPTION("Joystick device interfaces");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) MODULE_SUPPORTED_DEVICE("input/js");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define JOYDEV_MINOR_BASE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define JOYDEV_MINORS 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define JOYDEV_BUFFER_SIZE 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct joydev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct input_handle handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) wait_queue_head_t wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct list_head client_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) spinlock_t client_lock; /* protects client_list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct mutex mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct device dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct cdev cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) bool exist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct js_corr corr[ABS_CNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct JS_DATA_SAVE_TYPE glue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int nabs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int nkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) __u16 keymap[KEY_MAX - BTN_MISC + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) __u16 keypam[KEY_MAX - BTN_MISC + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) __u8 absmap[ABS_CNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) __u8 abspam[ABS_CNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) __s16 abs[ABS_CNT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct joydev_client {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct js_event buffer[JOYDEV_BUFFER_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int startup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) spinlock_t buffer_lock; /* protects access to buffer, head and tail */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct fasync_struct *fasync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct joydev *joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct list_head node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static int joydev_correct(int value, struct js_corr *corr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) switch (corr->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) case JS_CORR_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) case JS_CORR_BROKEN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) value = value > corr->coef[0] ? (value < corr->coef[1] ? 0 :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ((corr->coef[3] * (value - corr->coef[1])) >> 14)) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ((corr->coef[2] * (value - corr->coef[0])) >> 14);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return clamp(value, -32767, 32767);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static void joydev_pass_event(struct joydev_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct js_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * IRQs already disabled, just acquire the lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) spin_lock(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) client->buffer[client->head] = *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (client->startup == joydev->nabs + joydev->nkey) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) client->head++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) client->head &= JOYDEV_BUFFER_SIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (client->tail == client->head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) client->startup = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) spin_unlock(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) kill_fasync(&client->fasync, SIGIO, POLL_IN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static void joydev_event(struct input_handle *handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) unsigned int type, unsigned int code, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct joydev *joydev = handle->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct joydev_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct js_event event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) case EV_KEY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (code < BTN_MISC || value == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) event.type = JS_EVENT_BUTTON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) event.number = joydev->keymap[code - BTN_MISC];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) event.value = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) case EV_ABS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) event.type = JS_EVENT_AXIS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) event.number = joydev->absmap[code];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) event.value = joydev_correct(value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) &joydev->corr[event.number]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (event.value == joydev->abs[event.number])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) joydev->abs[event.number] = event.value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) event.time = jiffies_to_msecs(jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) list_for_each_entry_rcu(client, &joydev->client_list, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) joydev_pass_event(client, &event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) wake_up_interruptible(&joydev->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static int joydev_fasync(int fd, struct file *file, int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) struct joydev_client *client = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return fasync_helper(fd, file, on, &client->fasync);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static void joydev_free(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct joydev *joydev = container_of(dev, struct joydev, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) input_put_device(joydev->handle.dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) kfree(joydev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static void joydev_attach_client(struct joydev *joydev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct joydev_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) spin_lock(&joydev->client_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) list_add_tail_rcu(&client->node, &joydev->client_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) spin_unlock(&joydev->client_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static void joydev_detach_client(struct joydev *joydev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct joydev_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) spin_lock(&joydev->client_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) list_del_rcu(&client->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) spin_unlock(&joydev->client_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) synchronize_rcu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static void joydev_refresh_state(struct joydev *joydev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct input_dev *dev = joydev->handle.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int i, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) for (i = 0; i < joydev->nabs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) val = input_abs_get_val(dev, joydev->abspam[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) joydev->abs[i] = joydev_correct(val, &joydev->corr[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int joydev_open_device(struct joydev *joydev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) retval = mutex_lock_interruptible(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (!joydev->exist)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) retval = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) else if (!joydev->open++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) retval = input_open_device(&joydev->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) joydev->open--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) joydev_refresh_state(joydev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) mutex_unlock(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static void joydev_close_device(struct joydev *joydev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) mutex_lock(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (joydev->exist && !--joydev->open)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) input_close_device(&joydev->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) mutex_unlock(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * Wake up users waiting for IO so they can disconnect from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * dead device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) static void joydev_hangup(struct joydev *joydev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct joydev_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) spin_lock(&joydev->client_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) list_for_each_entry(client, &joydev->client_list, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) kill_fasync(&client->fasync, SIGIO, POLL_HUP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) spin_unlock(&joydev->client_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) wake_up_interruptible(&joydev->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static int joydev_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) struct joydev_client *client = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) joydev_detach_client(joydev, client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) kfree(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) joydev_close_device(joydev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static int joydev_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct joydev *joydev =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) container_of(inode->i_cdev, struct joydev, cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) struct joydev_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) client = kzalloc(sizeof(struct joydev_client), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (!client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) spin_lock_init(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) client->joydev = joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) joydev_attach_client(joydev, client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) error = joydev_open_device(joydev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) goto err_free_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) file->private_data = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) stream_open(inode, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) err_free_client:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) joydev_detach_client(joydev, client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) kfree(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) static int joydev_generate_startup_event(struct joydev_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct input_dev *input,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct js_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) int have_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) spin_lock_irq(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) have_event = client->startup < joydev->nabs + joydev->nkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (have_event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) event->time = jiffies_to_msecs(jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (client->startup < joydev->nkey) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) event->type = JS_EVENT_BUTTON | JS_EVENT_INIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) event->number = client->startup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) event->value = !!test_bit(joydev->keypam[event->number],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) input->key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) event->type = JS_EVENT_AXIS | JS_EVENT_INIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) event->number = client->startup - joydev->nkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) event->value = joydev->abs[event->number];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) client->startup++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) spin_unlock_irq(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return have_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static int joydev_fetch_next_event(struct joydev_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) struct js_event *event)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) int have_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) spin_lock_irq(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) have_event = client->head != client->tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (have_event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) *event = client->buffer[client->tail++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) client->tail &= JOYDEV_BUFFER_SIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) spin_unlock_irq(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return have_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * Old joystick interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static ssize_t joydev_0x_read(struct joydev_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct input_dev *input,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) char __user *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) struct JS_DATA_TYPE data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) spin_lock_irq(&input->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * Get device state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) for (data.buttons = i = 0; i < 32 && i < joydev->nkey; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) data.buttons |=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) test_bit(joydev->keypam[i], input->key) ? (1 << i) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) data.x = (joydev->abs[0] / 256 + 128) >> joydev->glue.JS_CORR.x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) data.y = (joydev->abs[1] / 256 + 128) >> joydev->glue.JS_CORR.y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * Reset reader's event queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) spin_lock(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) client->startup = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) client->tail = client->head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) spin_unlock(&client->buffer_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) spin_unlock_irq(&input->event_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (copy_to_user(buf, &data, sizeof(struct JS_DATA_TYPE)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return sizeof(struct JS_DATA_TYPE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static inline int joydev_data_pending(struct joydev_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return client->startup < joydev->nabs + joydev->nkey ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) client->head != client->tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) static ssize_t joydev_read(struct file *file, char __user *buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct joydev_client *client = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) struct input_dev *input = joydev->handle.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) struct js_event event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (!joydev->exist)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (count < sizeof(struct js_event))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (count == sizeof(struct JS_DATA_TYPE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return joydev_0x_read(client, input, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) if (!joydev_data_pending(client) && (file->f_flags & O_NONBLOCK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) retval = wait_event_interruptible(joydev->wait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) !joydev->exist || joydev_data_pending(client));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (!joydev->exist)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) while (retval + sizeof(struct js_event) <= count &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) joydev_generate_startup_event(client, input, &event)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) retval += sizeof(struct js_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) while (retval + sizeof(struct js_event) <= count &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) joydev_fetch_next_event(client, &event)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (copy_to_user(buf + retval, &event, sizeof(struct js_event)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) retval += sizeof(struct js_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) /* No kernel lock - fine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) static __poll_t joydev_poll(struct file *file, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) struct joydev_client *client = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) poll_wait(file, &joydev->wait, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return (joydev_data_pending(client) ? (EPOLLIN | EPOLLRDNORM) : 0) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) (joydev->exist ? 0 : (EPOLLHUP | EPOLLERR));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) static int joydev_handle_JSIOCSAXMAP(struct joydev *joydev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) void __user *argp, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) __u8 *abspam;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) len = min(len, sizeof(joydev->abspam));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) /* Validate the map. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) abspam = memdup_user(argp, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (IS_ERR(abspam))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) return PTR_ERR(abspam);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) for (i = 0; i < len && i < joydev->nabs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) if (abspam[i] > ABS_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) retval = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) memcpy(joydev->abspam, abspam, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) for (i = 0; i < joydev->nabs; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) joydev->absmap[joydev->abspam[i]] = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) kfree(abspam);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) static int joydev_handle_JSIOCSBTNMAP(struct joydev *joydev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) void __user *argp, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) __u16 *keypam;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (len % sizeof(*keypam))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) len = min(len, sizeof(joydev->keypam));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) /* Validate the map. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) keypam = memdup_user(argp, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (IS_ERR(keypam))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) return PTR_ERR(keypam);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) for (i = 0; i < (len / 2) && i < joydev->nkey; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) if (keypam[i] > KEY_MAX || keypam[i] < BTN_MISC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) retval = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) memcpy(joydev->keypam, keypam, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) for (i = 0; i < joydev->nkey; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) joydev->keymap[joydev->keypam[i] - BTN_MISC] = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) kfree(keypam);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) static int joydev_ioctl_common(struct joydev *joydev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) unsigned int cmd, void __user *argp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) struct input_dev *dev = joydev->handle.dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) /* Process fixed-sized commands. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) case JS_SET_CAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) return copy_from_user(&joydev->glue.JS_CORR, argp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) case JS_GET_CAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) return copy_to_user(argp, &joydev->glue.JS_CORR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) sizeof(joydev->glue.JS_CORR)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) case JS_SET_TIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return get_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) case JS_GET_TIMEOUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) return put_user(joydev->glue.JS_TIMEOUT, (s32 __user *) argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) case JSIOCGVERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) return put_user(JS_VERSION, (__u32 __user *) argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) case JSIOCGAXES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) return put_user(joydev->nabs, (__u8 __user *) argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) case JSIOCGBUTTONS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return put_user(joydev->nkey, (__u8 __user *) argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) case JSIOCSCORR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (copy_from_user(joydev->corr, argp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) sizeof(joydev->corr[0]) * joydev->nabs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) for (i = 0; i < joydev->nabs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) int val = input_abs_get_val(dev, joydev->abspam[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) joydev->abs[i] = joydev_correct(val, &joydev->corr[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) case JSIOCGCORR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) return copy_to_user(argp, joydev->corr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) sizeof(joydev->corr[0]) * joydev->nabs) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) * Process variable-sized commands (the axis and button map commands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * are considered variable-sized to decouple them from the values of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * ABS_MAX and KEY_MAX).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) switch (cmd & ~IOCSIZE_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) case (JSIOCSAXMAP & ~IOCSIZE_MASK):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) return joydev_handle_JSIOCSAXMAP(joydev, argp, _IOC_SIZE(cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) case (JSIOCGAXMAP & ~IOCSIZE_MASK):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->abspam));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) return copy_to_user(argp, joydev->abspam, len) ? -EFAULT : len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) case (JSIOCSBTNMAP & ~IOCSIZE_MASK):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) return joydev_handle_JSIOCSBTNMAP(joydev, argp, _IOC_SIZE(cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) case (JSIOCGBTNMAP & ~IOCSIZE_MASK):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) len = min_t(size_t, _IOC_SIZE(cmd), sizeof(joydev->keypam));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) return copy_to_user(argp, joydev->keypam, len) ? -EFAULT : len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) case JSIOCGNAME(0):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) name = dev->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) len = min_t(size_t, _IOC_SIZE(cmd), strlen(name) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) return copy_to_user(argp, name, len) ? -EFAULT : len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) static long joydev_compat_ioctl(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) struct joydev_client *client = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) void __user *argp = (void __user *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) s32 tmp32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct JS_DATA_SAVE_TYPE_32 ds32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) retval = mutex_lock_interruptible(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (!joydev->exist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) retval = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) case JS_SET_TIMELIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) retval = get_user(tmp32, (s32 __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) if (retval == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) joydev->glue.JS_TIMELIMIT = tmp32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) case JS_GET_TIMELIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) tmp32 = joydev->glue.JS_TIMELIMIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) retval = put_user(tmp32, (s32 __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) case JS_SET_ALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) retval = copy_from_user(&ds32, argp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) sizeof(ds32)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if (retval == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) joydev->glue.JS_TIMEOUT = ds32.JS_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) joydev->glue.BUSY = ds32.BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) joydev->glue.JS_EXPIRETIME = ds32.JS_EXPIRETIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) joydev->glue.JS_TIMELIMIT = ds32.JS_TIMELIMIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) joydev->glue.JS_SAVE = ds32.JS_SAVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) joydev->glue.JS_CORR = ds32.JS_CORR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) case JS_GET_ALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) ds32.JS_TIMEOUT = joydev->glue.JS_TIMEOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) ds32.BUSY = joydev->glue.BUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) ds32.JS_EXPIRETIME = joydev->glue.JS_EXPIRETIME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) ds32.JS_TIMELIMIT = joydev->glue.JS_TIMELIMIT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) ds32.JS_SAVE = joydev->glue.JS_SAVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) ds32.JS_CORR = joydev->glue.JS_CORR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) retval = copy_to_user(argp, &ds32, sizeof(ds32)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) retval = joydev_ioctl_common(joydev, cmd, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) mutex_unlock(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) #endif /* CONFIG_COMPAT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) static long joydev_ioctl(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) struct joydev_client *client = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) struct joydev *joydev = client->joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) void __user *argp = (void __user *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) retval = mutex_lock_interruptible(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (!joydev->exist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) retval = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) case JS_SET_TIMELIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) retval = get_user(joydev->glue.JS_TIMELIMIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) (long __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) case JS_GET_TIMELIMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) retval = put_user(joydev->glue.JS_TIMELIMIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) (long __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) case JS_SET_ALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) retval = copy_from_user(&joydev->glue, argp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) sizeof(joydev->glue)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) case JS_GET_ALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) retval = copy_to_user(argp, &joydev->glue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) sizeof(joydev->glue)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) retval = joydev_ioctl_common(joydev, cmd, argp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) mutex_unlock(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) static const struct file_operations joydev_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) .read = joydev_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) .poll = joydev_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) .open = joydev_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) .release = joydev_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) .unlocked_ioctl = joydev_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) .compat_ioctl = joydev_compat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) .fasync = joydev_fasync,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) .llseek = no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) * Mark device non-existent. This disables writes, ioctls and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) * prevents new users from opening the device. Already posted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * blocking reads will stay, however new ones will fail.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) static void joydev_mark_dead(struct joydev *joydev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) mutex_lock(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) joydev->exist = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) mutex_unlock(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) static void joydev_cleanup(struct joydev *joydev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) struct input_handle *handle = &joydev->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) joydev_mark_dead(joydev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) joydev_hangup(joydev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) /* joydev is marked dead so no one else accesses joydev->open */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) if (joydev->open)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) input_close_device(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) * These codes are copied from from hid-ids.h, unfortunately there is no common
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) * usb_ids/bt_ids.h header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) #define USB_VENDOR_ID_SONY 0x054c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) #define USB_DEVICE_ID_SONY_PS3_CONTROLLER 0x0268
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) #define USB_DEVICE_ID_SONY_PS4_CONTROLLER 0x05c4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) #define USB_DEVICE_ID_SONY_PS4_CONTROLLER_2 0x09cc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) #define USB_DEVICE_ID_SONY_PS4_CONTROLLER_DONGLE 0x0ba0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) #define USB_VENDOR_ID_THQ 0x20d6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) #define USB_DEVICE_ID_THQ_PS3_UDRAW 0xcb17
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) #define ACCEL_DEV(vnd, prd) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) .flags = INPUT_DEVICE_ID_MATCH_VENDOR | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) INPUT_DEVICE_ID_MATCH_PRODUCT | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) INPUT_DEVICE_ID_MATCH_PROPBIT, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) .vendor = (vnd), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) .product = (prd), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) .propbit = { BIT_MASK(INPUT_PROP_ACCELEROMETER) }, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) static const struct input_device_id joydev_blacklist[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) /* Avoid touchpads and touchscreens */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) INPUT_DEVICE_ID_MATCH_KEYBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) .evbit = { BIT_MASK(EV_KEY) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) /* Avoid tablets, digitisers and similar devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) INPUT_DEVICE_ID_MATCH_KEYBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) .evbit = { BIT_MASK(EV_KEY) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) .keybit = { [BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_DIGI) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) /* Disable accelerometers on composite devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) ACCEL_DEV(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS3_CONTROLLER),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) ACCEL_DEV(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS4_CONTROLLER),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) ACCEL_DEV(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS4_CONTROLLER_2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) ACCEL_DEV(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS4_CONTROLLER_DONGLE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) ACCEL_DEV(USB_VENDOR_ID_THQ, USB_DEVICE_ID_THQ_PS3_UDRAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) static bool joydev_dev_is_blacklisted(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) const struct input_device_id *id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) for (id = joydev_blacklist; id->flags; id++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) if (input_match_device_id(dev, id)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) dev_dbg(&dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) "joydev: blacklisting '%s'\n", dev->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) static bool joydev_dev_is_absolute_mouse(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) DECLARE_BITMAP(jd_scratch, KEY_CNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) bool ev_match = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) BUILD_BUG_ON(ABS_CNT > KEY_CNT || EV_CNT > KEY_CNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) * Virtualization (VMware, etc) and remote management (HP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) * ILO2) solutions use absolute coordinates for their virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) * pointing devices so that there is one-to-one relationship
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) * between pointer position on the host screen and virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) * guest screen, and so their mice use ABS_X, ABS_Y and 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) * primary button events. This clashes with what joydev
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) * considers to be joysticks (a device with at minimum ABS_X
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) * axis).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) * Here we are trying to separate absolute mice from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) * joysticks. A device is, for joystick detection purposes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) * considered to be an absolute mouse if the following is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) * true:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) * 1) Event types are exactly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) * EV_ABS, EV_KEY and EV_SYN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) * or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) * EV_ABS, EV_KEY, EV_SYN and EV_MSC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) * or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) * EV_ABS, EV_KEY, EV_SYN, EV_MSC and EV_REL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) * 2) Absolute events are exactly ABS_X and ABS_Y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) * 3) Keys are exactly BTN_LEFT, BTN_RIGHT and BTN_MIDDLE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) * 4) Device is not on "Amiga" bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) bitmap_zero(jd_scratch, EV_CNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) /* VMware VMMouse, HP ILO2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) __set_bit(EV_ABS, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) __set_bit(EV_KEY, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) __set_bit(EV_SYN, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) ev_match = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) /* HP ILO2, AMI BMC firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) __set_bit(EV_MSC, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) ev_match = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) /* VMware Virtual USB Mouse, QEMU USB Tablet, ATEN BMC firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) __set_bit(EV_REL, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) if (bitmap_equal(jd_scratch, dev->evbit, EV_CNT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) ev_match = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) if (!ev_match)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) bitmap_zero(jd_scratch, ABS_CNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) __set_bit(ABS_X, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) __set_bit(ABS_Y, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) if (!bitmap_equal(dev->absbit, jd_scratch, ABS_CNT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) bitmap_zero(jd_scratch, KEY_CNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) __set_bit(BTN_LEFT, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) __set_bit(BTN_RIGHT, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) __set_bit(BTN_MIDDLE, jd_scratch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (!bitmap_equal(dev->keybit, jd_scratch, KEY_CNT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) * Amiga joystick (amijoy) historically uses left/middle/right
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) * button events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) if (dev->id.bustype == BUS_AMIGA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) static bool joydev_match(struct input_handler *handler, struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) /* Disable blacklisted devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (joydev_dev_is_blacklisted(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) /* Avoid absolute mice */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) if (joydev_dev_is_absolute_mouse(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) const struct input_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) struct joydev *joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) int i, j, t, minor, dev_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) minor = input_get_new_minor(JOYDEV_MINOR_BASE, JOYDEV_MINORS, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) if (minor < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) error = minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) pr_err("failed to reserve new minor: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (!joydev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) goto err_free_minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) INIT_LIST_HEAD(&joydev->client_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) spin_lock_init(&joydev->client_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) mutex_init(&joydev->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) init_waitqueue_head(&joydev->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) joydev->exist = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) dev_no = minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) /* Normalize device number if it falls into legacy range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) if (dev_no < JOYDEV_MINOR_BASE + JOYDEV_MINORS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) dev_no -= JOYDEV_MINOR_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) dev_set_name(&joydev->dev, "js%d", dev_no);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) joydev->handle.dev = input_get_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) joydev->handle.name = dev_name(&joydev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) joydev->handle.handler = handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) joydev->handle.private = joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) for_each_set_bit(i, dev->absbit, ABS_CNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) joydev->absmap[i] = joydev->nabs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) joydev->abspam[joydev->nabs] = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) joydev->nabs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) for (i = BTN_JOYSTICK - BTN_MISC; i < KEY_MAX - BTN_MISC + 1; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) if (test_bit(i + BTN_MISC, dev->keybit)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) joydev->keymap[i] = joydev->nkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) joydev->keypam[joydev->nkey] = i + BTN_MISC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) joydev->nkey++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) for (i = 0; i < BTN_JOYSTICK - BTN_MISC; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) if (test_bit(i + BTN_MISC, dev->keybit)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) joydev->keymap[i] = joydev->nkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) joydev->keypam[joydev->nkey] = i + BTN_MISC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) joydev->nkey++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) for (i = 0; i < joydev->nabs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) j = joydev->abspam[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) if (input_abs_get_max(dev, j) == input_abs_get_min(dev, j)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) joydev->corr[i].type = JS_CORR_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) joydev->corr[i].type = JS_CORR_BROKEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) joydev->corr[i].prec = input_abs_get_fuzz(dev, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) t = (input_abs_get_max(dev, j) + input_abs_get_min(dev, j)) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) joydev->corr[i].coef[0] = t - input_abs_get_flat(dev, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) joydev->corr[i].coef[1] = t + input_abs_get_flat(dev, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) t = (input_abs_get_max(dev, j) - input_abs_get_min(dev, j)) / 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) - 2 * input_abs_get_flat(dev, j);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) if (t) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) joydev->corr[i].coef[2] = (1 << 29) / t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) joydev->corr[i].coef[3] = (1 << 29) / t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) joydev->dev.devt = MKDEV(INPUT_MAJOR, minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) joydev->dev.class = &input_class;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) joydev->dev.parent = &dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) joydev->dev.release = joydev_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) device_initialize(&joydev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) error = input_register_handle(&joydev->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) goto err_free_joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) cdev_init(&joydev->cdev, &joydev_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) error = cdev_device_add(&joydev->cdev, &joydev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) goto err_cleanup_joydev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) err_cleanup_joydev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) joydev_cleanup(joydev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) input_unregister_handle(&joydev->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) err_free_joydev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) put_device(&joydev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) err_free_minor:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) input_free_minor(minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) static void joydev_disconnect(struct input_handle *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) struct joydev *joydev = handle->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) cdev_device_del(&joydev->cdev, &joydev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) joydev_cleanup(joydev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) input_free_minor(MINOR(joydev->dev.devt));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) input_unregister_handle(handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) put_device(&joydev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) static const struct input_device_id joydev_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) INPUT_DEVICE_ID_MATCH_ABSBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) .evbit = { BIT_MASK(EV_ABS) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) .absbit = { BIT_MASK(ABS_X) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) INPUT_DEVICE_ID_MATCH_ABSBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) .evbit = { BIT_MASK(EV_ABS) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) .absbit = { BIT_MASK(ABS_Z) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) INPUT_DEVICE_ID_MATCH_ABSBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) .evbit = { BIT_MASK(EV_ABS) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) .absbit = { BIT_MASK(ABS_WHEEL) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) INPUT_DEVICE_ID_MATCH_ABSBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) .evbit = { BIT_MASK(EV_ABS) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) .absbit = { BIT_MASK(ABS_THROTTLE) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) INPUT_DEVICE_ID_MATCH_KEYBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) .evbit = { BIT_MASK(EV_KEY) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) .keybit = {[BIT_WORD(BTN_JOYSTICK)] = BIT_MASK(BTN_JOYSTICK) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) INPUT_DEVICE_ID_MATCH_KEYBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) .evbit = { BIT_MASK(EV_KEY) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) .keybit = { [BIT_WORD(BTN_GAMEPAD)] = BIT_MASK(BTN_GAMEPAD) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) INPUT_DEVICE_ID_MATCH_KEYBIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) .evbit = { BIT_MASK(EV_KEY) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) .keybit = { [BIT_WORD(BTN_TRIGGER_HAPPY)] = BIT_MASK(BTN_TRIGGER_HAPPY) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) { } /* Terminating entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) MODULE_DEVICE_TABLE(input, joydev_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) static struct input_handler joydev_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) .event = joydev_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) .match = joydev_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) .connect = joydev_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) .disconnect = joydev_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) .legacy_minors = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) .minor = JOYDEV_MINOR_BASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) .name = "joydev",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) .id_table = joydev_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) static int __init joydev_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) return input_register_handler(&joydev_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) static void __exit joydev_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) input_unregister_handler(&joydev_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) module_init(joydev_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) module_exit(joydev_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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