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kernel/drivers/hid/hid-corsair.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* HID driver for Corsair devices
*
* Supported devices:
* - Vengeance K70 Keyboard
* - K70 RAPIDFIRE Keyboard
* - Vengeance K90 Keyboard
* - Scimitar PRO RGB Gaming Mouse
*
* Copyright (c) 2015 Clement Vuchener
* Copyright (c) 2017 Oscar Campos
* Copyright (c) 2017 Aaron Bottegal
*/
/*
*/
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/leds.h>
#include "hid-ids.h"
#define CORSAIR_USE_K90_MACRO (1<<0)
#define CORSAIR_USE_K90_BACKLIGHT (1<<1)
struct k90_led {
struct led_classdev cdev;
int brightness;
struct work_struct work;
bool removed;
};
struct k90_drvdata {
struct k90_led record_led;
};
struct corsair_drvdata {
unsigned long quirks;
struct k90_drvdata *k90;
struct k90_led *backlight;
};
#define K90_GKEY_COUNT 18
static int corsair_usage_to_gkey(unsigned int usage)
{
/* G1 (0xd0) to G16 (0xdf) */
if (usage >= 0xd0 && usage <= 0xdf)
return usage - 0xd0 + 1;
/* G17 (0xe8) to G18 (0xe9) */
if (usage >= 0xe8 && usage <= 0xe9)
return usage - 0xe8 + 17;
return 0;
}
static unsigned short corsair_gkey_map[K90_GKEY_COUNT] = {
BTN_TRIGGER_HAPPY1,
BTN_TRIGGER_HAPPY2,
BTN_TRIGGER_HAPPY3,
BTN_TRIGGER_HAPPY4,
BTN_TRIGGER_HAPPY5,
BTN_TRIGGER_HAPPY6,
BTN_TRIGGER_HAPPY7,
BTN_TRIGGER_HAPPY8,
BTN_TRIGGER_HAPPY9,
BTN_TRIGGER_HAPPY10,
BTN_TRIGGER_HAPPY11,
BTN_TRIGGER_HAPPY12,
BTN_TRIGGER_HAPPY13,
BTN_TRIGGER_HAPPY14,
BTN_TRIGGER_HAPPY15,
BTN_TRIGGER_HAPPY16,
BTN_TRIGGER_HAPPY17,
BTN_TRIGGER_HAPPY18,
};
module_param_array_named(gkey_codes, corsair_gkey_map, ushort, NULL, S_IRUGO);
MODULE_PARM_DESC(gkey_codes, "Key codes for the G-keys");
static unsigned short corsair_record_keycodes[2] = {
BTN_TRIGGER_HAPPY19,
BTN_TRIGGER_HAPPY20
};
module_param_array_named(recordkey_codes, corsair_record_keycodes, ushort,
NULL, S_IRUGO);
MODULE_PARM_DESC(recordkey_codes, "Key codes for the MR (start and stop record) button");
static unsigned short corsair_profile_keycodes[3] = {
BTN_TRIGGER_HAPPY21,
BTN_TRIGGER_HAPPY22,
BTN_TRIGGER_HAPPY23
};
module_param_array_named(profilekey_codes, corsair_profile_keycodes, ushort,
NULL, S_IRUGO);
MODULE_PARM_DESC(profilekey_codes, "Key codes for the profile buttons");
#define CORSAIR_USAGE_SPECIAL_MIN 0xf0
#define CORSAIR_USAGE_SPECIAL_MAX 0xff
#define CORSAIR_USAGE_MACRO_RECORD_START 0xf6
#define CORSAIR_USAGE_MACRO_RECORD_STOP 0xf7
#define CORSAIR_USAGE_PROFILE 0xf1
#define CORSAIR_USAGE_M1 0xf1
#define CORSAIR_USAGE_M2 0xf2
#define CORSAIR_USAGE_M3 0xf3
#define CORSAIR_USAGE_PROFILE_MAX 0xf3
#define CORSAIR_USAGE_META_OFF 0xf4
#define CORSAIR_USAGE_META_ON 0xf5
#define CORSAIR_USAGE_LIGHT 0xfa
#define CORSAIR_USAGE_LIGHT_OFF 0xfa
#define CORSAIR_USAGE_LIGHT_DIM 0xfb
#define CORSAIR_USAGE_LIGHT_MEDIUM 0xfc
#define CORSAIR_USAGE_LIGHT_BRIGHT 0xfd
#define CORSAIR_USAGE_LIGHT_MAX 0xfd
/* USB control protocol */
#define K90_REQUEST_BRIGHTNESS 49
#define K90_REQUEST_MACRO_MODE 2
#define K90_REQUEST_STATUS 4
#define K90_REQUEST_GET_MODE 5
#define K90_REQUEST_PROFILE 20
#define K90_MACRO_MODE_SW 0x0030
#define K90_MACRO_MODE_HW 0x0001
#define K90_MACRO_LED_ON 0x0020
#define K90_MACRO_LED_OFF 0x0040
/*
* LED class devices
*/
#define K90_BACKLIGHT_LED_SUFFIX "::backlight"
#define K90_RECORD_LED_SUFFIX "::record"
static enum led_brightness k90_backlight_get(struct led_classdev *led_cdev)
{
int ret;
struct k90_led *led = container_of(led_cdev, struct k90_led, cdev);
struct device *dev = led->cdev.dev->parent;
struct usb_interface *usbif = to_usb_interface(dev->parent);
struct usb_device *usbdev = interface_to_usbdev(usbif);
int brightness;
char *data;
data = kmalloc(8, GFP_KERNEL);
if (!data)
return -ENOMEM;
ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
K90_REQUEST_STATUS,
USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, 0, 0, data, 8,
USB_CTRL_SET_TIMEOUT);
if (ret < 5) {
dev_warn(dev, "Failed to get K90 initial state (error %d).\n",
ret);
ret = -EIO;
goto out;
}
brightness = data[4];
if (brightness < 0 || brightness > 3) {
dev_warn(dev,
"Read invalid backlight brightness: %02hhx.\n",
data[4]);
ret = -EIO;
goto out;
}
ret = brightness;
out:
kfree(data);
return ret;
}
static enum led_brightness k90_record_led_get(struct led_classdev *led_cdev)
{
struct k90_led *led = container_of(led_cdev, struct k90_led, cdev);
return led->brightness;
}
static void k90_brightness_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct k90_led *led = container_of(led_cdev, struct k90_led, cdev);
led->brightness = brightness;
schedule_work(&led->work);
}
static void k90_backlight_work(struct work_struct *work)
{
int ret;
struct k90_led *led = container_of(work, struct k90_led, work);
struct device *dev;
struct usb_interface *usbif;
struct usb_device *usbdev;
if (led->removed)
return;
dev = led->cdev.dev->parent;
usbif = to_usb_interface(dev->parent);
usbdev = interface_to_usbdev(usbif);
ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
K90_REQUEST_BRIGHTNESS,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, led->brightness, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
if (ret != 0)
dev_warn(dev, "Failed to set backlight brightness (error: %d).\n",
ret);
}
static void k90_record_led_work(struct work_struct *work)
{
int ret;
struct k90_led *led = container_of(work, struct k90_led, work);
struct device *dev;
struct usb_interface *usbif;
struct usb_device *usbdev;
int value;
if (led->removed)
return;
dev = led->cdev.dev->parent;
usbif = to_usb_interface(dev->parent);
usbdev = interface_to_usbdev(usbif);
if (led->brightness > 0)
value = K90_MACRO_LED_ON;
else
value = K90_MACRO_LED_OFF;
ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
K90_REQUEST_MACRO_MODE,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, value, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (ret != 0)
dev_warn(dev, "Failed to set record LED state (error: %d).\n",
ret);
}
/*
* Keyboard attributes
*/
static ssize_t k90_show_macro_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
struct usb_interface *usbif = to_usb_interface(dev->parent);
struct usb_device *usbdev = interface_to_usbdev(usbif);
const char *macro_mode;
char *data;
data = kmalloc(2, GFP_KERNEL);
if (!data)
return -ENOMEM;
ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
K90_REQUEST_GET_MODE,
USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, 0, 0, data, 2,
USB_CTRL_SET_TIMEOUT);
if (ret < 1) {
dev_warn(dev, "Failed to get K90 initial mode (error %d).\n",
ret);
ret = -EIO;
goto out;
}
switch (data[0]) {
case K90_MACRO_MODE_HW:
macro_mode = "HW";
break;
case K90_MACRO_MODE_SW:
macro_mode = "SW";
break;
default:
dev_warn(dev, "K90 in unknown mode: %02hhx.\n",
data[0]);
ret = -EIO;
goto out;
}
ret = sysfs_emit(buf, "%s\n", macro_mode);
out:
kfree(data);
return ret;
}
static ssize_t k90_store_macro_mode(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
struct usb_interface *usbif = to_usb_interface(dev->parent);
struct usb_device *usbdev = interface_to_usbdev(usbif);
__u16 value;
if (strncmp(buf, "SW", 2) == 0)
value = K90_MACRO_MODE_SW;
else if (strncmp(buf, "HW", 2) == 0)
value = K90_MACRO_MODE_HW;
else
return -EINVAL;
ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
K90_REQUEST_MACRO_MODE,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, value, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (ret != 0) {
dev_warn(dev, "Failed to set macro mode.\n");
return ret;
}
return count;
}
static ssize_t k90_show_current_profile(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int ret;
struct usb_interface *usbif = to_usb_interface(dev->parent);
struct usb_device *usbdev = interface_to_usbdev(usbif);
int current_profile;
char *data;
data = kmalloc(8, GFP_KERNEL);
if (!data)
return -ENOMEM;
ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
K90_REQUEST_STATUS,
USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, 0, 0, data, 8,
USB_CTRL_SET_TIMEOUT);
if (ret < 8) {
dev_warn(dev, "Failed to get K90 initial state (error %d).\n",
ret);
ret = -EIO;
goto out;
}
current_profile = data[7];
if (current_profile < 1 || current_profile > 3) {
dev_warn(dev, "Read invalid current profile: %02hhx.\n",
data[7]);
ret = -EIO;
goto out;
}
ret = sysfs_emit(buf, "%d\n", current_profile);
out:
kfree(data);
return ret;
}
static ssize_t k90_store_current_profile(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
struct usb_interface *usbif = to_usb_interface(dev->parent);
struct usb_device *usbdev = interface_to_usbdev(usbif);
int profile;
if (kstrtoint(buf, 10, &profile))
return -EINVAL;
if (profile < 1 || profile > 3)
return -EINVAL;
ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
K90_REQUEST_PROFILE,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE, profile, 0, NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (ret != 0) {
dev_warn(dev, "Failed to change current profile (error %d).\n",
ret);
return ret;
}
return count;
}
static DEVICE_ATTR(macro_mode, 0644, k90_show_macro_mode, k90_store_macro_mode);
static DEVICE_ATTR(current_profile, 0644, k90_show_current_profile,
k90_store_current_profile);
static struct attribute *k90_attrs[] = {
&dev_attr_macro_mode.attr,
&dev_attr_current_profile.attr,
NULL
};
static const struct attribute_group k90_attr_group = {
.attrs = k90_attrs,
};
/*
* Driver functions
*/
static int k90_init_backlight(struct hid_device *dev)
{
int ret;
struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
size_t name_sz;
char *name;
drvdata->backlight = kzalloc(sizeof(struct k90_led), GFP_KERNEL);
if (!drvdata->backlight) {
ret = -ENOMEM;
goto fail_backlight_alloc;
}
name_sz =
strlen(dev_name(&dev->dev)) + sizeof(K90_BACKLIGHT_LED_SUFFIX);
name = kzalloc(name_sz, GFP_KERNEL);
if (!name) {
ret = -ENOMEM;
goto fail_name_alloc;
}
snprintf(name, name_sz, "%s" K90_BACKLIGHT_LED_SUFFIX,
dev_name(&dev->dev));
drvdata->backlight->removed = false;
drvdata->backlight->cdev.name = name;
drvdata->backlight->cdev.max_brightness = 3;
drvdata->backlight->cdev.brightness_set = k90_brightness_set;
drvdata->backlight->cdev.brightness_get = k90_backlight_get;
INIT_WORK(&drvdata->backlight->work, k90_backlight_work);
ret = led_classdev_register(&dev->dev, &drvdata->backlight->cdev);
if (ret != 0)
goto fail_register_cdev;
return 0;
fail_register_cdev:
kfree(drvdata->backlight->cdev.name);
fail_name_alloc:
kfree(drvdata->backlight);
drvdata->backlight = NULL;
fail_backlight_alloc:
return ret;
}
static int k90_init_macro_functions(struct hid_device *dev)
{
int ret;
struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
struct k90_drvdata *k90;
size_t name_sz;
char *name;
k90 = kzalloc(sizeof(struct k90_drvdata), GFP_KERNEL);
if (!k90) {
ret = -ENOMEM;
goto fail_drvdata;
}
drvdata->k90 = k90;
/* Init LED device for record LED */
name_sz = strlen(dev_name(&dev->dev)) + sizeof(K90_RECORD_LED_SUFFIX);
name = kzalloc(name_sz, GFP_KERNEL);
if (!name) {
ret = -ENOMEM;
goto fail_record_led_alloc;
}
snprintf(name, name_sz, "%s" K90_RECORD_LED_SUFFIX,
dev_name(&dev->dev));
k90->record_led.removed = false;
k90->record_led.cdev.name = name;
k90->record_led.cdev.max_brightness = 1;
k90->record_led.cdev.brightness_set = k90_brightness_set;
k90->record_led.cdev.brightness_get = k90_record_led_get;
INIT_WORK(&k90->record_led.work, k90_record_led_work);
k90->record_led.brightness = 0;
ret = led_classdev_register(&dev->dev, &k90->record_led.cdev);
if (ret != 0)
goto fail_record_led;
/* Init attributes */
ret = sysfs_create_group(&dev->dev.kobj, &k90_attr_group);
if (ret != 0)
goto fail_sysfs;
return 0;
fail_sysfs:
k90->record_led.removed = true;
led_classdev_unregister(&k90->record_led.cdev);
cancel_work_sync(&k90->record_led.work);
fail_record_led:
kfree(k90->record_led.cdev.name);
fail_record_led_alloc:
kfree(k90);
fail_drvdata:
drvdata->k90 = NULL;
return ret;
}
static void k90_cleanup_backlight(struct hid_device *dev)
{
struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
if (drvdata->backlight) {
drvdata->backlight->removed = true;
led_classdev_unregister(&drvdata->backlight->cdev);
cancel_work_sync(&drvdata->backlight->work);
kfree(drvdata->backlight->cdev.name);
kfree(drvdata->backlight);
}
}
static void k90_cleanup_macro_functions(struct hid_device *dev)
{
struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
struct k90_drvdata *k90 = drvdata->k90;
if (k90) {
sysfs_remove_group(&dev->dev.kobj, &k90_attr_group);
k90->record_led.removed = true;
led_classdev_unregister(&k90->record_led.cdev);
cancel_work_sync(&k90->record_led.work);
kfree(k90->record_led.cdev.name);
kfree(k90);
}
}
static int corsair_probe(struct hid_device *dev, const struct hid_device_id *id)
{
int ret;
unsigned long quirks = id->driver_data;
struct corsair_drvdata *drvdata;
struct usb_interface *usbif;
if (!hid_is_usb(dev))
return -EINVAL;
usbif = to_usb_interface(dev->dev.parent);
drvdata = devm_kzalloc(&dev->dev, sizeof(struct corsair_drvdata),
GFP_KERNEL);
if (drvdata == NULL)
return -ENOMEM;
drvdata->quirks = quirks;
hid_set_drvdata(dev, drvdata);
ret = hid_parse(dev);
if (ret != 0) {
hid_err(dev, "parse failed\n");
return ret;
}
ret = hid_hw_start(dev, HID_CONNECT_DEFAULT);
if (ret != 0) {
hid_err(dev, "hw start failed\n");
return ret;
}
if (usbif->cur_altsetting->desc.bInterfaceNumber == 0) {
if (quirks & CORSAIR_USE_K90_MACRO) {
ret = k90_init_macro_functions(dev);
if (ret != 0)
hid_warn(dev, "Failed to initialize K90 macro functions.\n");
}
if (quirks & CORSAIR_USE_K90_BACKLIGHT) {
ret = k90_init_backlight(dev);
if (ret != 0)
hid_warn(dev, "Failed to initialize K90 backlight.\n");
}
}
return 0;
}
static void corsair_remove(struct hid_device *dev)
{
k90_cleanup_macro_functions(dev);
k90_cleanup_backlight(dev);
hid_hw_stop(dev);
}
static int corsair_event(struct hid_device *dev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
struct corsair_drvdata *drvdata = hid_get_drvdata(dev);
if (!drvdata->k90)
return 0;
switch (usage->hid & HID_USAGE) {
case CORSAIR_USAGE_MACRO_RECORD_START:
drvdata->k90->record_led.brightness = 1;
break;
case CORSAIR_USAGE_MACRO_RECORD_STOP:
drvdata->k90->record_led.brightness = 0;
break;
default:
break;
}
return 0;
}
static int corsair_input_mapping(struct hid_device *dev,
struct hid_input *input,
struct hid_field *field,
struct hid_usage *usage, unsigned long **bit,
int *max)
{
int gkey;
if ((usage->hid & HID_USAGE_PAGE) != HID_UP_KEYBOARD)
return 0;
gkey = corsair_usage_to_gkey(usage->hid & HID_USAGE);
if (gkey != 0) {
hid_map_usage_clear(input, usage, bit, max, EV_KEY,
corsair_gkey_map[gkey - 1]);
return 1;
}
if ((usage->hid & HID_USAGE) >= CORSAIR_USAGE_SPECIAL_MIN &&
(usage->hid & HID_USAGE) <= CORSAIR_USAGE_SPECIAL_MAX) {
switch (usage->hid & HID_USAGE) {
case CORSAIR_USAGE_MACRO_RECORD_START:
hid_map_usage_clear(input, usage, bit, max, EV_KEY,
corsair_record_keycodes[0]);
return 1;
case CORSAIR_USAGE_MACRO_RECORD_STOP:
hid_map_usage_clear(input, usage, bit, max, EV_KEY,
corsair_record_keycodes[1]);
return 1;
case CORSAIR_USAGE_M1:
hid_map_usage_clear(input, usage, bit, max, EV_KEY,
corsair_profile_keycodes[0]);
return 1;
case CORSAIR_USAGE_M2:
hid_map_usage_clear(input, usage, bit, max, EV_KEY,
corsair_profile_keycodes[1]);
return 1;
case CORSAIR_USAGE_M3:
hid_map_usage_clear(input, usage, bit, max, EV_KEY,
corsair_profile_keycodes[2]);
return 1;
default:
return -1;
}
}
return 0;
}
/*
* The report descriptor of some of the Corsair gaming mice is
* non parseable as they define two consecutive Logical Minimum for
* the Usage Page (Consumer) in rdescs bytes 75 and 77 being 77 0x16
* that should be obviousy 0x26 for Logical Magimum of 16 bits. This
* prevents poper parsing of the report descriptor due Logical
* Minimum being larger than Logical Maximum.
*
* This driver fixes the report descriptor for:
* - USB ID 1b1c:1b34, sold as GLAIVE RGB Gaming mouse
* - USB ID 1b1c:1b3e, sold as Scimitar RGB Pro Gaming mouse
*/
static __u8 *corsair_mouse_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
/*
* Corsair GLAIVE RGB and Scimitar RGB Pro report descriptor is
* broken and defines two different Logical Minimum for the
* Consumer Application. The byte 77 should be a 0x26 defining
* a 16 bits integer for the Logical Maximum but it is a 0x16
* instead (Logical Minimum)
*/
switch (hdev->product) {
case USB_DEVICE_ID_CORSAIR_GLAIVE_RGB:
case USB_DEVICE_ID_CORSAIR_SCIMITAR_PRO_RGB:
if (*rsize >= 172 && rdesc[75] == 0x15 && rdesc[77] == 0x16
&& rdesc[78] == 0xff && rdesc[79] == 0x0f) {
hid_info(hdev, "Fixing up report descriptor\n");
rdesc[77] = 0x26;
}
break;
}
}
return rdesc;
}
static const struct hid_device_id corsair_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR, USB_DEVICE_ID_CORSAIR_K90),
.driver_data = CORSAIR_USE_K90_MACRO |
CORSAIR_USE_K90_BACKLIGHT },
{ HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR,
USB_DEVICE_ID_CORSAIR_GLAIVE_RGB) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR,
USB_DEVICE_ID_CORSAIR_SCIMITAR_PRO_RGB) },
/*
* Vengeance K70 and K70 RAPIDFIRE share product IDs.
*/
{ HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR,
USB_DEVICE_ID_CORSAIR_K70R) },
{}
};
MODULE_DEVICE_TABLE(hid, corsair_devices);
static struct hid_driver corsair_driver = {
.name = "corsair",
.id_table = corsair_devices,
.probe = corsair_probe,
.event = corsair_event,
.remove = corsair_remove,
.input_mapping = corsair_input_mapping,
.report_fixup = corsair_mouse_report_fixup,
};
module_hid_driver(corsair_driver);
MODULE_LICENSE("GPL");
/* Original K90 driver author */
MODULE_AUTHOR("Clement Vuchener");
/* Scimitar PRO RGB driver author */
MODULE_AUTHOR("Oscar Campos");
MODULE_DESCRIPTION("HID driver for Corsair devices");
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