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Date: Sat, 29 Aug 2015 16:03:52 +0200
From: Clément Vuchener <clement.vuchener@...il.com>
To: jkosina@...e.com
Cc: linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-input@...r.kernel.org
Subject: [PATCH 1/1] Corsair Vengeance K90 driver
---
Documentation/ABI/testing/sysfs-class-k90_profile | 55 ++
.../ABI/testing/sysfs-driver-hid-corsair-k90 | 15 +
drivers/hid/Kconfig | 10 +
drivers/hid/Makefile | 1 +
drivers/hid/hid-core.c | 1 +
drivers/hid/hid-corsair-k90.c | 690
+++++++++++++++++++++
drivers/hid/hid-ids.h | 3 +
7 files changed, 775 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-class-k90_profile
create mode 100644 Documentation/ABI/testing/sysfs-driver-hid-corsair-k90
create mode 100644 drivers/hid/hid-corsair-k90.c
diff --git a/Documentation/ABI/testing/sysfs-class-k90_profile
b/Documentation/ABI/testing/sysfs-class-k90_profile
new file mode 100644
index 0000000..3275c16
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-k90_profile
@@ -0,0 +1,55 @@
+What: /sys/class/k90_profile/<profile>/profile_number
+Date: August 2015
+KernelVersion: 4.2
+Contact: Clement Vuchener <clement.vuchener@...il.com>
+Description: Get the number of the profile.
+
+What: /sys/class/k90_profile/<profile>/bindings
+Date: August 2015
+KernelVersion: 4.2
+Contact: Clement Vuchener <clement.vuchener@...il.com>
+Description: Write bindings to the keyboard on-board profile.
+ The data structure is:
+ - number of bindings in this structure (1 byte)
+ - size of this data structure (2 bytes big endian)
+ - size of the macro data written to
+ /sys/class/k90_profile/<profile>/data (2 bytes big endian)
+ - array of bindings referencing the data from
+ /sys/class/k90_profile/<profile>/data, each containing:
+ * 0x10 for a key usage, 0x20 for a macro (1 byte)
+ * offset of the key usage/macro data (2 bytes big endian)
+ * length of the key usage/macro data (2 bytes big endian)
+
+What: /sys/class/k90_profile/<profile>/keys
+Date: August 2015
+KernelVersion: 4.2
+Contact: Clement Vuchener <clement.vuchener@...il.com>
+Description: Write the list of the keys used by the bindings and how
+ the macros are repeated.
+ The data struct is:
+ - number of keys in this structure (1 byte)
+ - array of keys and repeat mode:
+ * key usage (G1 to G16 are 0xD0 to 0xDF, G17 and
+ G18 are 0xE8 and 0xE9) (1 byte)
+ * repeat mode (1 byte):
+ 1: play when pressed
+ 2: repeat while key is pressed
+ 3: repeat until the key is pressed again
+
+What: /sys/class/k90_profile/<profile>/data
+Date: August 2015
+KernelVersion: 4.2
+Contact: Clement Vuchener <clement.vuchener@...il.com>
+Description: Write the key usage and macros used by
+ /sys/class/k90_profile/<profile>/bindings
+ Macro items are:
+ - Key event:
+ * item type: 0x84 (1 byte)
+ * HID usage (1 byte)
+ * new state: 0 released, 1 pressed (1 byte)
+ - Delay
+ * item type: 0x87 (1 byte)
+ * delay in milliseconds (2 bytes big endian)
+ - Macro end
+ * item type: 0x86 (1 byte)
+ * repeat count (2 bytes big endian)
diff --git a/Documentation/ABI/testing/sysfs-driver-hid-corsair-k90
b/Documentation/ABI/testing/sysfs-driver-hid-corsair-k90
new file mode 100644
index 0000000..16d50ae
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-driver-hid-corsair-k90
@@ -0,0 +1,15 @@
+What: /sys/bus/drivers/k90/<dev>/macro_mode
+Date: August 2015
+KernelVersion: 4.2
+Contact: Clement Vuchener <clement.vuchener@...il.com>
+Description: Get/set the current playback mode. "SW" for software mode
+ where G-keys triggers their regular key codes. "HW" for
+ hardware playback mode where the G-keys play their macro
+ from the on-board memory.
+
+
+What: /sys/bus/drivers/k90/<dev>/current_profile
+Date: August 2015
+KernelVersion: 4.2
+Contact: Clement Vuchener <clement.vuchener@...il.com>
+Description: Get/set the current selected profile. Values are from 1 to 3.
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index cc4c664..db6d8a5 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -171,6 +171,16 @@ config HID_CHICONY
---help---
Support for Chicony Tactical pad.
+config HID_CORSAIR
+ tristate "Corsair devices"
+ depends on HID
+ ---help---
+ Support for Corsair devices that are not fully compliant with the
+ HID standard.
+
+ Supported devices:
+ - Vengeance K90
+
config HID_PRODIKEYS
tristate "Prodikeys PC-MIDI Keyboard support"
depends on HID && SND
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 2f8a41d..e94a0a5 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_HID_BELKIN) += hid-belkin.o
obj-$(CONFIG_HID_BETOP_FF) += hid-betopff.o
obj-$(CONFIG_HID_CHERRY) += hid-cherry.o
obj-$(CONFIG_HID_CHICONY) += hid-chicony.o
+obj-$(CONFIG_HID_CORSAIR) += hid-corsair-k90.o
obj-$(CONFIG_HID_CP2112) += hid-cp2112.o
obj-$(CONFIG_HID_CYPRESS) += hid-cypress.o
obj-$(CONFIG_HID_DRAGONRISE) += hid-dr.o
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index e6fce23..f0d9125 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1807,6 +1807,7 @@ static const struct hid_device_id
hid_have_special_driver[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY,
USB_DEVICE_ID_CHICONY_WIRELESS) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY,
USB_DEVICE_ID_CHICONY_WIRELESS2) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR, USB_DEVICE_ID_CORSAIR_K90) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS,
USB_DEVICE_ID_PRODIKEYS_PCMIDI) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CYGNAL, USB_DEVICE_ID_CYGNAL_CP2112) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
USB_DEVICE_ID_CYPRESS_BARCODE_1) },
diff --git a/drivers/hid/hid-corsair-k90.c b/drivers/hid/hid-corsair-k90.c
new file mode 100644
index 0000000..67c1095
--- /dev/null
+++ b/drivers/hid/hid-corsair-k90.c
@@ -0,0 +1,690 @@
+/*
+ * HID driver for Corsair Vengeance K90 Keyboard
+ * Copyright (c) 2015 Clement Vuchener
+ */
+
+/*
+ * 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.
+ */
+
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/leds.h>
+
+#include "hid-ids.h"
+
+struct k90_led {
+ struct led_classdev cdev;
+ int brightness;
+ struct work_struct work;
+};
+
+struct k90_profile {
+ struct device *dev;
+ int profile;
+};
+
+struct k90_drvdata {
+ int current_profile;
+ int macro_mode;
+ int meta_locked;
+ struct k90_led backlight;
+ struct k90_led record_led;
+ struct k90_profile profile[3];
+};
+
+#define K90_GKEY_COUNT 18
+
+static int k90_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 k90_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, k90_gkey_map, ushort, NULL, S_IRUGO);
+
+#define K90_USAGE_SPECIAL_MIN 0xf0
+#define K90_USAGE_SPECIAL_MAX 0xff
+
+#define K90_USAGE_MACRO_RECORD_START 0xf6
+#define K90_USAGE_MACRO_RECORD_STOP 0xf7
+
+#define K90_USAGE_PROFILE 0xf1
+#define K90_USAGE_M1 0xf1
+#define K90_USAGE_M2 0xf2
+#define K90_USAGE_M3 0xf3
+#define K90_USAGE_PROFILE_MAX 0xf3
+
+#define K90_USAGE_META_OFF 0xf4
+#define K90_USAGE_META_ON 0xf5
+
+#define K90_USAGE_LIGHT 0xfa
+#define K90_USAGE_LIGHT_OFF 0xfa
+#define K90_USAGE_LIGHT_DIM 0xfb
+#define K90_USAGE_LIGHT_MEDIUM 0xfc
+#define K90_USAGE_LIGHT_BRIGHT 0xfd
+#define K90_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_REQUEST_PROFILE_BINDINGS 16
+#define K90_REQUEST_PROFILE_KEYS 22
+#define K90_REQUEST_PROFILE_DATA 18
+
+#define K90_BINDINGS_MAX_LENGTH 128
+#define K90_KEYS_MAX_LENGTH 64
+/* K90_DATA_MAX_LENGTH may be higher but that is the maximum I tested */
+#define K90_DATA_MAX_LENGTH 4096
+
+#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 ":blue:backlight"
+#define K90_RECORD_LED_SUFFIX ":red:record"
+
+static enum led_brightness k90_brightness_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 = led->cdev.dev->parent;
+ struct usb_interface *usbif = to_usb_interface(dev->parent);
+ struct usb_device *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 = led->cdev.dev->parent;
+ struct usb_interface *usbif = to_usb_interface(dev->parent);
+ struct usb_device *usbdev = interface_to_usbdev(usbif);
+ int value;
+
+ 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)
+{
+ struct k90_drvdata *drvdata = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ (drvdata->macro_mode ? "HW" : "SW"));
+}
+
+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);
+ struct k90_drvdata *drvdata = dev_get_drvdata(dev);
+ __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)
+ return ret;
+
+ drvdata->macro_mode = (value == K90_MACRO_MODE_HW);
+
+ return count;
+}
+
+static ssize_t k90_show_current_profile(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct k90_drvdata *drvdata = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", drvdata->current_profile);
+}
+
+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);
+ struct k90_drvdata *drvdata = dev_get_drvdata(dev);
+ 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)
+ return ret;
+
+ drvdata->current_profile = profile;
+
+ 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,
+};
+
+/*
+ * Profile device class and attributes
+ */
+
+static struct class *k90_profile_class;
+
+static ssize_t k90_profile_show_profile_number(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct k90_profile *data = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", data->profile);
+}
+
+static ssize_t k90_profile_write_bindings(struct file *fp, struct
kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ int ret;
+ struct device *pdev = container_of(kobj, struct device, kobj);
+ struct k90_profile *data = dev_get_drvdata(pdev);
+ struct usb_interface *usbif = to_usb_interface(pdev->parent->parent);
+ struct usb_device *usbdev = interface_to_usbdev(usbif);
+
+ if (count > K90_BINDINGS_MAX_LENGTH)
+ return -EMSGSIZE;
+
+ ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
+ K90_REQUEST_PROFILE_BINDINGS,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, 0, data->profile, buf,
+ count, USB_CTRL_SET_TIMEOUT);
+ if (ret != 0)
+ return ret;
+
+ return count;
+}
+
+static ssize_t k90_profile_write_keys(struct file *fp, struct kobject
*kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ int ret;
+ struct device *pdev = container_of(kobj, struct device, kobj);
+ struct k90_profile *data = dev_get_drvdata(pdev);
+ struct usb_interface *usbif = to_usb_interface(pdev->parent->parent);
+ struct usb_device *usbdev = interface_to_usbdev(usbif);
+
+ if (count > K90_KEYS_MAX_LENGTH)
+ return -EMSGSIZE;
+
+ ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
+ K90_REQUEST_PROFILE_KEYS,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, 0, data->profile, buf,
+ count, USB_CTRL_SET_TIMEOUT);
+ if (ret != 0)
+ return ret;
+
+ return count;
+}
+
+static ssize_t k90_profile_write_data(struct file *fp, struct kobject
*kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ int ret;
+ struct device *pdev = container_of(kobj, struct device, kobj);
+ struct k90_profile *data = dev_get_drvdata(pdev);
+ struct usb_interface *usbif = to_usb_interface(pdev->parent->parent);
+ struct usb_device *usbdev = interface_to_usbdev(usbif);
+
+ if (count > K90_DATA_MAX_LENGTH)
+ return -EMSGSIZE;
+
+ ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0),
+ K90_REQUEST_PROFILE_DATA,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, 0, data->profile, buf,
+ count, USB_CTRL_SET_TIMEOUT);
+ if (ret != 0)
+ return ret;
+
+ return count;
+}
+
+static DEVICE_ATTR(profile_number, 0444,
k90_profile_show_profile_number, NULL);
+static BIN_ATTR(bindings, 0200, NULL, k90_profile_write_bindings, 0);
+static BIN_ATTR(keys, 0200, NULL, k90_profile_write_keys, 0);
+static BIN_ATTR(data, 0200, NULL, k90_profile_write_data, 0);
+
+static struct attribute *k90_profile_attrs[] = {
+ &dev_attr_profile_number.attr,
+ NULL
+};
+
+static struct bin_attribute *k90_profile_bin_attrs[] = {
+ &bin_attr_bindings,
+ &bin_attr_keys,
+ &bin_attr_data,
+ NULL
+};
+
+static const struct attribute_group k90_profile_attr_group = {
+ .attrs = k90_profile_attrs,
+ .bin_attrs = k90_profile_bin_attrs,
+};
+
+static const struct attribute_group *k90_profile_attr_groups[] = {
+ &k90_profile_attr_group,
+ NULL
+};
+
+/*
+ * Driver functions
+ */
+
+static int k90_init_special_functions(struct hid_device *dev)
+{
+ int ret, i;
+ struct usb_interface *usbif = to_usb_interface(dev->dev.parent);
+ struct usb_device *usbdev = interface_to_usbdev(usbif);
+ char data[8];
+ struct k90_drvdata *drvdata =
+ kzalloc(sizeof(struct k90_drvdata), GFP_KERNEL);
+ size_t name_sz;
+ char *name;
+ struct k90_led *led;
+
+ if (!drvdata) {
+ ret = -ENOMEM;
+ goto fail_drvdata;
+ }
+ hid_set_drvdata(dev, drvdata);
+
+ /* Get current status */
+ 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 < 0) {
+ hid_warn(dev, "Failed to get K90 initial state (error %d).\n",
+ ret);
+ drvdata->backlight.brightness = 0;
+ drvdata->current_profile = 1;
+ } else {
+ drvdata->backlight.brightness = data[4];
+ drvdata->current_profile = data[7];
+ }
+ /* Get current mode */
+ 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 < 0)
+ hid_warn(dev, "Failed to get K90 initial mode (error %d).\n",
+ ret);
+ else {
+ switch (data[0]) {
+ case K90_MACRO_MODE_HW:
+ drvdata->macro_mode = 1;
+ break;
+ case K90_MACRO_MODE_SW:
+ drvdata->macro_mode = 0;
+ break;
+ default:
+ hid_warn(dev, "K90 in unknown mode: %02x.\n",
+ data[0]);
+ }
+ }
+
+ /* Init LED device for backlight */
+ name_sz =
+ strlen(dev_name(&dev->dev)) + sizeof(K90_BACKLIGHT_LED_SUFFIX);
+ name = devm_kzalloc(&dev->dev, name_sz, GFP_KERNEL);
+ if (!name) {
+ ret = -ENOMEM;
+ goto fail_backlight;
+ }
+ snprintf(name, name_sz, "%s" K90_BACKLIGHT_LED_SUFFIX,
+ dev_name(&dev->dev));
+ led = &drvdata->backlight;
+ led->cdev.name = name;
+ led->cdev.max_brightness = 3;
+ led->cdev.brightness_set = k90_brightness_set;
+ led->cdev.brightness_get = k90_brightness_get;
+ INIT_WORK(&led->work, k90_backlight_work);
+ ret = led_classdev_register(&dev->dev, &led->cdev);
+ if (ret != 0)
+ goto fail_backlight;
+
+ /* Init LED device for record LED */
+ name_sz = strlen(dev_name(&dev->dev)) + sizeof(K90_RECORD_LED_SUFFIX);
+ name = devm_kzalloc(&dev->dev, name_sz, GFP_KERNEL);
+ if (!name) {
+ ret = -ENOMEM;
+ goto fail_record_led;
+ }
+ snprintf(name, name_sz, "%s" K90_RECORD_LED_SUFFIX,
+ dev_name(&dev->dev));
+ led = &drvdata->record_led;
+ led->cdev.name = name;
+ led->cdev.max_brightness = 1;
+ led->cdev.brightness_set = k90_brightness_set;
+ led->cdev.brightness_get = k90_brightness_get;
+ INIT_WORK(&led->work, k90_record_led_work);
+ ret = led_classdev_register(&dev->dev, &led->cdev);
+ if (ret != 0)
+ goto fail_record_led;
+
+ /* Create profile devices */
+ for (i = 0; i < 3; ++i) {
+ drvdata->profile[i].profile = i + 1;
+ drvdata->profile[i].dev =
+ device_create_with_groups(k90_profile_class, &dev->dev, 0,
+ &drvdata->profile[i],
+ k90_profile_attr_groups,
+ "%s:profile%d",
+ dev_name(&dev->dev), i + 1);
+ if (IS_ERR(drvdata->profile[i].dev)) {
+ ret = PTR_ERR(drvdata->profile[i].dev);
+ for (i = i - 1; i >= 0; --i)
+ device_unregister(drvdata->profile[i].dev);
+ goto fail_profile;
+ }
+ }
+
+ /* Init attributes */
+ ret = sysfs_create_group(&dev->dev.kobj, &k90_attr_group);
+ if (ret != 0)
+ goto fail_sysfs;
+
+ return 0;
+
+fail_sysfs:
+ for (i = 0; i < 3; ++i)
+ device_unregister(drvdata->profile[i].dev);
+fail_profile:
+ led_classdev_unregister(&drvdata->record_led.cdev);
+ flush_work(&drvdata->record_led.work);
+fail_record_led:
+ led_classdev_unregister(&drvdata->backlight.cdev);
+ flush_work(&drvdata->backlight.work);
+fail_backlight:
+ kfree(drvdata);
+fail_drvdata:
+ hid_set_drvdata(dev, NULL);
+ return ret;
+}
+
+static void k90_cleanup_special_functions(struct hid_device *dev)
+{
+ int i;
+ struct k90_drvdata *drvdata = hid_get_drvdata(dev);
+
+ if (drvdata) {
+ sysfs_remove_group(&dev->dev.kobj, &k90_attr_group);
+ for (i = 0; i < 3; ++i)
+ device_unregister(drvdata->profile[i].dev);
+ led_classdev_unregister(&drvdata->record_led.cdev);
+ led_classdev_unregister(&drvdata->backlight.cdev);
+ flush_work(&drvdata->record_led.work);
+ flush_work(&drvdata->backlight.work);
+ kfree(drvdata);
+ }
+}
+
+static int k90_probe(struct hid_device *dev, const struct hid_device_id
*id)
+{
+ int ret;
+ struct usb_interface *usbif = to_usb_interface(dev->dev.parent);
+
+ 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) {
+ ret = k90_init_special_functions(dev);
+ if (ret != 0)
+ hid_warn(dev, "Failed to initialize K90 special functions.\n");
+ } else
+ hid_set_drvdata(dev, NULL);
+
+ return 0;
+}
+
+static void k90_remove(struct hid_device *dev)
+{
+ struct usb_interface *usbif = to_usb_interface(dev->dev.parent);
+
+ if (usbif->cur_altsetting->desc.bInterfaceNumber == 0)
+ k90_cleanup_special_functions(dev);
+
+ hid_hw_stop(dev);
+}
+
+static int k90_event(struct hid_device *dev, struct hid_field *field,
+ struct hid_usage *usage, __s32 value)
+{
+ struct k90_drvdata *drvdata = hid_get_drvdata(dev);
+
+ if (!drvdata)
+ return 0;
+
+ switch (usage->hid & HID_USAGE) {
+ case K90_USAGE_MACRO_RECORD_START:
+ drvdata->record_led.brightness = 1;
+ break;
+ case K90_USAGE_MACRO_RECORD_STOP:
+ drvdata->record_led.brightness = 0;
+ break;
+ case K90_USAGE_M1:
+ case K90_USAGE_M2:
+ case K90_USAGE_M3:
+ drvdata->current_profile =
+ (usage->hid & HID_USAGE) - K90_USAGE_PROFILE + 1;
+ break;
+ case K90_USAGE_META_OFF:
+ drvdata->meta_locked = 0;
+ break;
+ case K90_USAGE_META_ON:
+ drvdata->meta_locked = 1;
+ break;
+ case K90_USAGE_LIGHT_OFF:
+ case K90_USAGE_LIGHT_DIM:
+ case K90_USAGE_LIGHT_MEDIUM:
+ case K90_USAGE_LIGHT_BRIGHT:
+ drvdata->backlight.brightness = (usage->hid & HID_USAGE) -
+ K90_USAGE_LIGHT;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int k90_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;
+
+ gkey = k90_usage_to_gkey(usage->hid & HID_USAGE);
+ if (gkey != 0) {
+ hid_map_usage_clear(input, usage, bit, max, EV_KEY,
+ k90_gkey_map[gkey - 1]);
+ return 1;
+ }
+ if ((usage->hid & HID_USAGE) >= K90_USAGE_SPECIAL_MIN &&
+ (usage->hid & HID_USAGE) <= K90_USAGE_SPECIAL_MAX)
+ return -1;
+
+ return 0;
+}
+
+static const struct hid_device_id k90_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR, USB_DEVICE_ID_CORSAIR_K90) },
+ {}
+};
+
+MODULE_DEVICE_TABLE(hid, k90_devices);
+
+static struct hid_driver k90_driver = {
+ .name = "k90",
+ .id_table = k90_devices,
+ .probe = k90_probe,
+ .event = k90_event,
+ .remove = k90_remove,
+ .input_mapping = k90_input_mapping,
+};
+
+static int __init k90_init(void)
+{
+ int ret;
+
+ k90_profile_class = class_create(THIS_MODULE, "k90_profile");
+ if (IS_ERR(k90_profile_class))
+ return PTR_ERR(k90_profile_class);
+
+ ret = hid_register_driver(&k90_driver);
+ if (ret != 0) {
+ class_destroy(k90_profile_class);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void k90_exit(void)
+{
+ hid_unregister_driver(&k90_driver);
+ class_destroy(k90_profile_class);
+}
+
+module_init(k90_init);
+module_exit(k90_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Clement Vuchener");
+MODULE_DESCRIPTION("HID driver for Corsair Vengeance K90 Keyboard");
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index b3b225b..f23b9ac 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -246,6 +246,9 @@
#define USB_DEVICE_ID_CODEMERCS_IOW_FIRST 0x1500
#define USB_DEVICE_ID_CODEMERCS_IOW_LAST 0x15ff
+#define USB_VENDOR_ID_CORSAIR 0x1b1c
+#define USB_DEVICE_ID_CORSAIR_K90 0x1b02
+
#define USB_VENDOR_ID_CREATIVELABS 0x041e
#define USB_DEVICE_ID_PRODIKEYS_PCMIDI 0x2801
-- 2.4.3
--
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