#include <linux/sysctl.h>
#include <linux/input.h>
#include <linux/module.h>
-#include <linux/kbd_kern.h>
-
-static struct input_dev *emumousebtn;
-static int emumousebtn_input_register(void);
static int mouse_emulate_buttons;
static int mouse_button2_keycode = KEY_RIGHTCTRL; /* right control key */
static int mouse_button3_keycode = KEY_RIGHTALT; /* right option key */
-static int mouse_last_keycode;
-#if defined(CONFIG_SYSCTL)
+static struct input_dev *mac_hid_emumouse_dev;
+
+static int mac_hid_create_emumouse(void)
+{
+ static struct lock_class_key mac_hid_emumouse_dev_event_class;
+ static struct lock_class_key mac_hid_emumouse_dev_mutex_class;
+ int err;
+
+ mac_hid_emumouse_dev = input_allocate_device();
+ if (!mac_hid_emumouse_dev)
+ return -ENOMEM;
+
+ lockdep_set_class(&mac_hid_emumouse_dev->event_lock,
+ &mac_hid_emumouse_dev_event_class);
+ lockdep_set_class(&mac_hid_emumouse_dev->mutex,
+ &mac_hid_emumouse_dev_mutex_class);
+
+ mac_hid_emumouse_dev->name = "Macintosh mouse button emulation";
+ mac_hid_emumouse_dev->id.bustype = BUS_ADB;
+ mac_hid_emumouse_dev->id.vendor = 0x0001;
+ mac_hid_emumouse_dev->id.product = 0x0001;
+ mac_hid_emumouse_dev->id.version = 0x0100;
+
+ mac_hid_emumouse_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
+ mac_hid_emumouse_dev->keybit[BIT_WORD(BTN_MOUSE)] =
+ BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
+ mac_hid_emumouse_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
+
+ err = input_register_device(mac_hid_emumouse_dev);
+ if (err) {
+ input_free_device(mac_hid_emumouse_dev);
+ mac_hid_emumouse_dev = NULL;
+ return err;
+ }
+
+ return 0;
+}
+
+static void mac_hid_destroy_emumouse(void)
+{
+ input_unregister_device(mac_hid_emumouse_dev);
+ mac_hid_emumouse_dev = NULL;
+}
+
+static bool mac_hid_emumouse_filter(struct input_handle *handle,
+ unsigned int type, unsigned int code,
+ int value)
+{
+ unsigned int btn;
+
+ if (type != EV_KEY)
+ return false;
+
+ if (code == mouse_button2_keycode)
+ btn = BTN_MIDDLE;
+ else if (code == mouse_button3_keycode)
+ btn = BTN_RIGHT;
+ else
+ return false;
+
+ input_report_key(mac_hid_emumouse_dev, btn, value);
+ input_sync(mac_hid_emumouse_dev);
+
+ return true;
+}
+
+static int mac_hid_emumouse_connect(struct input_handler *handler,
+ struct input_dev *dev,
+ const struct input_device_id *id)
+{
+ struct input_handle *handle;
+ int error;
+
+ /* Don't bind to ourselves */
+ if (dev == mac_hid_emumouse_dev)
+ return -ENODEV;
+
+ handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
+ if (!handle)
+ return -ENOMEM;
+
+ handle->dev = dev;
+ handle->handler = handler;
+ handle->name = "mac-button-emul";
+
+ error = input_register_handle(handle);
+ if (error) {
+ printk(KERN_ERR
+ "mac_hid: Failed to register button emulation handle, "
+ "error %d\n", error);
+ goto err_free;
+ }
+
+ error = input_open_device(handle);
+ if (error) {
+ printk(KERN_ERR
+ "mac_hid: Failed to open input device, error %d\n",
+ error);
+ goto err_unregister;
+ }
+
+ return 0;
+
+ err_unregister:
+ input_unregister_handle(handle);
+ err_free:
+ kfree(handle);
+ return error;
+}
+
+static void mac_hid_emumouse_disconnect(struct input_handle *handle)
+{
+ input_close_device(handle);
+ input_unregister_handle(handle);
+ kfree(handle);
+}
+
+static const struct input_device_id mac_hid_emumouse_ids[] = {
+ {
+ .flags = INPUT_DEVICE_ID_MATCH_EVBIT,
+ .evbit = { BIT_MASK(EV_KEY) },
+ },
+ { },
+};
+
+MODULE_DEVICE_TABLE(input, mac_hid_emumouse_ids);
+
+static struct input_handler mac_hid_emumouse_handler = {
+ .filter = mac_hid_emumouse_filter,
+ .connect = mac_hid_emumouse_connect,
+ .disconnect = mac_hid_emumouse_disconnect,
+ .name = "mac-button-emul",
+ .id_table = mac_hid_emumouse_ids,
+};
+
+static int mac_hid_start_emulation(void)
+{
+ int err;
+
+ err = mac_hid_create_emumouse();
+ if (err)
+ return err;
+
+ err = input_register_handler(&mac_hid_emumouse_handler);
+ if (err) {
+ mac_hid_destroy_emumouse();
+ return err;
+ }
+
+ return 0;
+}
+
+static void mac_hid_stop_emulation(void)
+{
+ input_unregister_handler(&mac_hid_emumouse_handler);
+ mac_hid_destroy_emumouse();
+}
+
+static int mac_hid_toggle_emumouse(ctl_table *table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos)
+{
+ int *valp = table->data;
+ int old_val = *valp;
+ int rc;
+
+ rc = proc_dointvec(table, write, buffer, lenp, ppos);
+
+ if (rc == 0 && write && *valp != old_val) {
+ if (*valp == 1)
+ rc = mac_hid_start_emulation();
+ else if (*valp == 0)
+ mac_hid_stop_emulation();
+ else
+ rc = -EINVAL;
+ }
+
+ /* Restore the old value in case of error */
+ if (rc)
+ *valp = old_val;
+
+ return rc;
+}
+
/* file(s) in /proc/sys/dev/mac_hid */
static ctl_table mac_hid_files[] = {
{
.data = &mouse_emulate_buttons,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec,
+ .proc_handler = mac_hid_toggle_emumouse,
},
{
.procname = "mouse_button2_keycode",
static struct ctl_table_header *mac_hid_sysctl_header;
-#endif /* endif CONFIG_SYSCTL */
-
-int mac_hid_mouse_emulate_buttons(int caller, unsigned int keycode, int down)
-{
- switch (caller) {
- case 1:
- /* Called from keyboard.c */
- if (mouse_emulate_buttons
- && (keycode == mouse_button2_keycode
- || keycode == mouse_button3_keycode)) {
- if (mouse_emulate_buttons == 1) {
- input_report_key(emumousebtn,
- keycode == mouse_button2_keycode ? BTN_MIDDLE : BTN_RIGHT,
- down);
- input_sync(emumousebtn);
- return 1;
- }
- mouse_last_keycode = down ? keycode : 0;
- }
- break;
- }
- return 0;
-}
-
-static struct lock_class_key emumousebtn_event_class;
-static struct lock_class_key emumousebtn_mutex_class;
-
-static int emumousebtn_input_register(void)
-{
- int ret;
-
- emumousebtn = input_allocate_device();
- if (!emumousebtn)
- return -ENOMEM;
-
- lockdep_set_class(&emumousebtn->event_lock, &emumousebtn_event_class);
- lockdep_set_class(&emumousebtn->mutex, &emumousebtn_mutex_class);
-
- emumousebtn->name = "Macintosh mouse button emulation";
- emumousebtn->id.bustype = BUS_ADB;
- emumousebtn->id.vendor = 0x0001;
- emumousebtn->id.product = 0x0001;
- emumousebtn->id.version = 0x0100;
-
- emumousebtn->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
- emumousebtn->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
- BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
- emumousebtn->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
-
- ret = input_register_device(emumousebtn);
- if (ret)
- input_free_device(emumousebtn);
-
- return ret;
-}
static int __init mac_hid_init(void)
{
- int err;
-
- err = emumousebtn_input_register();
- if (err)
- return err;
-
-#if defined(CONFIG_SYSCTL)
mac_hid_sysctl_header = register_sysctl_table(mac_hid_root_dir);
-#endif /* CONFIG_SYSCTL */
+ if (!mac_hid_sysctl_header)
+ return -ENOMEM;
return 0;
}
projects / firefly-linux-kernel-4.4.55.git / commitdiff