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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Roccat Lua driver for Linux
*
* Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net>
*/
/*
*/
/*
* Roccat Lua is a gamer mouse which cpi, button and light settings can be
* configured.
*/
#include <linux/device.h>
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/hid-roccat.h>
#include "hid-ids.h"
#include "hid-roccat-common.h"
#include "hid-roccat-lua.h"
static ssize_t lua_sysfs_read(struct file *fp, struct kobject *kobj,
char *buf, loff_t off, size_t count,
size_t real_size, uint command)
{
struct device *dev = kobj_to_dev(kobj);
struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev));
struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
int retval;
if (off >= real_size)
return 0;
if (off != 0 || count != real_size)
return -EINVAL;
mutex_lock(&lua->lua_lock);
retval = roccat_common2_receive(usb_dev, command, buf, real_size);
mutex_unlock(&lua->lua_lock);
return retval ? retval : real_size;
}
static ssize_t lua_sysfs_write(struct file *fp, struct kobject *kobj,
void const *buf, loff_t off, size_t count,
size_t real_size, uint command)
{
struct device *dev = kobj_to_dev(kobj);
struct lua_device *lua = hid_get_drvdata(dev_get_drvdata(dev));
struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
int retval;
if (off != 0 || count != real_size)
return -EINVAL;
mutex_lock(&lua->lua_lock);
retval = roccat_common2_send(usb_dev, command, buf, real_size);
mutex_unlock(&lua->lua_lock);
return retval ? retval : real_size;
}
#define LUA_SYSFS_W(thingy, THINGY) \
static ssize_t lua_sysfs_write_ ## thingy(struct file *fp, \
struct kobject *kobj, struct bin_attribute *attr, \
char *buf, loff_t off, size_t count) \
{ \
return lua_sysfs_write(fp, kobj, buf, off, count, \
LUA_SIZE_ ## THINGY, LUA_COMMAND_ ## THINGY); \
}
#define LUA_SYSFS_R(thingy, THINGY) \
static ssize_t lua_sysfs_read_ ## thingy(struct file *fp, \
struct kobject *kobj, struct bin_attribute *attr, \
char *buf, loff_t off, size_t count) \
{ \
return lua_sysfs_read(fp, kobj, buf, off, count, \
LUA_SIZE_ ## THINGY, LUA_COMMAND_ ## THINGY); \
}
#define LUA_BIN_ATTRIBUTE_RW(thingy, THINGY) \
LUA_SYSFS_W(thingy, THINGY) \
LUA_SYSFS_R(thingy, THINGY) \
static struct bin_attribute lua_ ## thingy ## _attr = { \
.attr = { .name = #thingy, .mode = 0660 }, \
.size = LUA_SIZE_ ## THINGY, \
.read = lua_sysfs_read_ ## thingy, \
.write = lua_sysfs_write_ ## thingy \
};
LUA_BIN_ATTRIBUTE_RW(control, CONTROL)
static int lua_create_sysfs_attributes(struct usb_interface *intf)
{
return sysfs_create_bin_file(&intf->dev.kobj, &lua_control_attr);
}
static void lua_remove_sysfs_attributes(struct usb_interface *intf)
{
sysfs_remove_bin_file(&intf->dev.kobj, &lua_control_attr);
}
static int lua_init_lua_device_struct(struct usb_device *usb_dev,
struct lua_device *lua)
{
mutex_init(&lua->lua_lock);
return 0;
}
static int lua_init_specials(struct hid_device *hdev)
{
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct lua_device *lua;
int retval;
lua = kzalloc(sizeof(*lua), GFP_KERNEL);
if (!lua) {
hid_err(hdev, "can't alloc device descriptor\n");
return -ENOMEM;
}
hid_set_drvdata(hdev, lua);
retval = lua_init_lua_device_struct(usb_dev, lua);
if (retval) {
hid_err(hdev, "couldn't init struct lua_device\n");
goto exit;
}
retval = lua_create_sysfs_attributes(intf);
if (retval) {
hid_err(hdev, "cannot create sysfs files\n");
goto exit;
}
return 0;
exit:
kfree(lua);
return retval;
}
static void lua_remove_specials(struct hid_device *hdev)
{
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
struct lua_device *lua;
lua_remove_sysfs_attributes(intf);
lua = hid_get_drvdata(hdev);
kfree(lua);
}
static int lua_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
int retval;
retval = hid_parse(hdev);
if (retval) {
hid_err(hdev, "parse failed\n");
goto exit;
}
retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (retval) {
hid_err(hdev, "hw start failed\n");
goto exit;
}
retval = lua_init_specials(hdev);
if (retval) {
hid_err(hdev, "couldn't install mouse\n");
goto exit_stop;
}
return 0;
exit_stop:
hid_hw_stop(hdev);
exit:
return retval;
}
static void lua_remove(struct hid_device *hdev)
{
lua_remove_specials(hdev);
hid_hw_stop(hdev);
}
static const struct hid_device_id lua_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_LUA) },
{ }
};
MODULE_DEVICE_TABLE(hid, lua_devices);
static struct hid_driver lua_driver = {
.name = "lua",
.id_table = lua_devices,
.probe = lua_probe,
.remove = lua_remove
};
module_hid_driver(lua_driver);
MODULE_AUTHOR("Stefan Achatz");
MODULE_DESCRIPTION("USB Roccat Lua driver");
MODULE_LICENSE("GPL v2");
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