Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 756 insertions, 0 deletions

diff --git a/drivers/hid/hid-corsair.c b/drivers/hid/hid-corsair.c
new file mode 100644
index 000000000..8c895c820
--- /dev/null
+++ b/drivers/hid/hid-corsair.c
@@ -0,0 +1,756 @@
+// 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 = snprintf(buf, PAGE_SIZE, "%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 = snprintf(buf, PAGE_SIZE, "%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");