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linux-next/drivers/hid/hid-roccat-lua.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

213 lines
4.9 KiB
C

// 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");