linux/drivers/hid/hid-roccat-isku.c
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   1/*
   2 * Roccat Isku driver for Linux
   3 *
   4 * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
   5 */
   6
   7/*
   8 * This program is free software; you can redistribute it and/or modify it
   9 * under the terms of the GNU General Public License as published by the Free
  10 * Software Foundation; either version 2 of the License, or (at your option)
  11 * any later version.
  12 */
  13
  14/*
  15 * Roccat Isku is a gamer keyboard with macro keys that can be configured in
  16 * 5 profiles.
  17 */
  18
  19#include <linux/device.h>
  20#include <linux/input.h>
  21#include <linux/hid.h>
  22#include <linux/module.h>
  23#include <linux/slab.h>
  24#include <linux/hid-roccat.h>
  25#include "hid-ids.h"
  26#include "hid-roccat-common.h"
  27#include "hid-roccat-isku.h"
  28
  29static struct class *isku_class;
  30
  31static void isku_profile_activated(struct isku_device *isku, uint new_profile)
  32{
  33        isku->actual_profile = new_profile;
  34}
  35
  36static int isku_receive(struct usb_device *usb_dev, uint command,
  37                void *buf, uint size)
  38{
  39        return roccat_common2_receive(usb_dev, command, buf, size);
  40}
  41
  42static int isku_get_actual_profile(struct usb_device *usb_dev)
  43{
  44        struct isku_actual_profile buf;
  45        int retval;
  46
  47        retval = isku_receive(usb_dev, ISKU_COMMAND_ACTUAL_PROFILE,
  48                        &buf, sizeof(struct isku_actual_profile));
  49        return retval ? retval : buf.actual_profile;
  50}
  51
  52static int isku_set_actual_profile(struct usb_device *usb_dev, int new_profile)
  53{
  54        struct isku_actual_profile buf;
  55
  56        buf.command = ISKU_COMMAND_ACTUAL_PROFILE;
  57        buf.size = sizeof(struct isku_actual_profile);
  58        buf.actual_profile = new_profile;
  59        return roccat_common2_send_with_status(usb_dev,
  60                        ISKU_COMMAND_ACTUAL_PROFILE, &buf,
  61                        sizeof(struct isku_actual_profile));
  62}
  63
  64static ssize_t isku_sysfs_show_actual_profile(struct device *dev,
  65                struct device_attribute *attr, char *buf)
  66{
  67        struct isku_device *isku =
  68                        hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
  69        return snprintf(buf, PAGE_SIZE, "%d\n", isku->actual_profile);
  70}
  71
  72static ssize_t isku_sysfs_set_actual_profile(struct device *dev,
  73                struct device_attribute *attr, char const *buf, size_t size)
  74{
  75        struct isku_device *isku;
  76        struct usb_device *usb_dev;
  77        unsigned long profile;
  78        int retval;
  79        struct isku_roccat_report roccat_report;
  80
  81        dev = dev->parent->parent;
  82        isku = hid_get_drvdata(dev_get_drvdata(dev));
  83        usb_dev = interface_to_usbdev(to_usb_interface(dev));
  84
  85        retval = strict_strtoul(buf, 10, &profile);
  86        if (retval)
  87                return retval;
  88
  89        if (profile > 4)
  90                return -EINVAL;
  91
  92        mutex_lock(&isku->isku_lock);
  93
  94        retval = isku_set_actual_profile(usb_dev, profile);
  95        if (retval) {
  96                mutex_unlock(&isku->isku_lock);
  97                return retval;
  98        }
  99
 100        isku_profile_activated(isku, profile);
 101
 102        roccat_report.event = ISKU_REPORT_BUTTON_EVENT_PROFILE;
 103        roccat_report.data1 = profile + 1;
 104        roccat_report.data2 = 0;
 105        roccat_report.profile = profile + 1;
 106        roccat_report_event(isku->chrdev_minor, (uint8_t const *)&roccat_report);
 107
 108        mutex_unlock(&isku->isku_lock);
 109
 110        return size;
 111}
 112
 113static struct device_attribute isku_attributes[] = {
 114        __ATTR(actual_profile, 0660,
 115                        isku_sysfs_show_actual_profile,
 116                        isku_sysfs_set_actual_profile),
 117        __ATTR_NULL
 118};
 119
 120static ssize_t isku_sysfs_read(struct file *fp, struct kobject *kobj,
 121                char *buf, loff_t off, size_t count,
 122                size_t real_size, uint command)
 123{
 124        struct device *dev =
 125                        container_of(kobj, struct device, kobj)->parent->parent;
 126        struct isku_device *isku = hid_get_drvdata(dev_get_drvdata(dev));
 127        struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 128        int retval;
 129
 130        if (off >= real_size)
 131                return 0;
 132
 133        if (off != 0 || count != real_size)
 134                return -EINVAL;
 135
 136        mutex_lock(&isku->isku_lock);
 137        retval = isku_receive(usb_dev, command, buf, real_size);
 138        mutex_unlock(&isku->isku_lock);
 139
 140        return retval ? retval : real_size;
 141}
 142
 143static ssize_t isku_sysfs_write(struct file *fp, struct kobject *kobj,
 144                void const *buf, loff_t off, size_t count,
 145                size_t real_size, uint command)
 146{
 147        struct device *dev =
 148                        container_of(kobj, struct device, kobj)->parent->parent;
 149        struct isku_device *isku = hid_get_drvdata(dev_get_drvdata(dev));
 150        struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
 151        int retval;
 152
 153        if (off != 0 || count != real_size)
 154                return -EINVAL;
 155
 156        mutex_lock(&isku->isku_lock);
 157        retval = roccat_common2_send_with_status(usb_dev, command,
 158                        (void *)buf, real_size);
 159        mutex_unlock(&isku->isku_lock);
 160
 161        return retval ? retval : real_size;
 162}
 163
 164#define ISKU_SYSFS_W(thingy, THINGY) \
 165static ssize_t isku_sysfs_write_ ## thingy(struct file *fp, struct kobject *kobj, \
 166                struct bin_attribute *attr, char *buf, \
 167                loff_t off, size_t count) \
 168{ \
 169        return isku_sysfs_write(fp, kobj, buf, off, count, \
 170                        ISKU_SIZE_ ## THINGY, ISKU_COMMAND_ ## THINGY); \
 171}
 172
 173#define ISKU_SYSFS_R(thingy, THINGY) \
 174static ssize_t isku_sysfs_read_ ## thingy(struct file *fp, struct kobject *kobj, \
 175                struct bin_attribute *attr, char *buf, \
 176                loff_t off, size_t count) \
 177{ \
 178        return isku_sysfs_read(fp, kobj, buf, off, count, \
 179                        ISKU_SIZE_ ## THINGY, ISKU_COMMAND_ ## THINGY); \
 180}
 181
 182#define ISKU_SYSFS_RW(thingy, THINGY) \
 183ISKU_SYSFS_R(thingy, THINGY) \
 184ISKU_SYSFS_W(thingy, THINGY)
 185
 186#define ISKU_BIN_ATTR_RW(thingy, THINGY) \
 187{ \
 188        .attr = { .name = #thingy, .mode = 0660 }, \
 189        .size = ISKU_SIZE_ ## THINGY, \
 190        .read = isku_sysfs_read_ ## thingy, \
 191        .write = isku_sysfs_write_ ## thingy \
 192}
 193
 194#define ISKU_BIN_ATTR_R(thingy, THINGY) \
 195{ \
 196        .attr = { .name = #thingy, .mode = 0440 }, \
 197        .size = ISKU_SIZE_ ## THINGY, \
 198        .read = isku_sysfs_read_ ## thingy, \
 199}
 200
 201#define ISKU_BIN_ATTR_W(thingy, THINGY) \
 202{ \
 203        .attr = { .name = #thingy, .mode = 0220 }, \
 204        .size = ISKU_SIZE_ ## THINGY, \
 205        .write = isku_sysfs_write_ ## thingy \
 206}
 207
 208ISKU_SYSFS_RW(macro, MACRO)
 209ISKU_SYSFS_RW(keys_function, KEYS_FUNCTION)
 210ISKU_SYSFS_RW(keys_easyzone, KEYS_EASYZONE)
 211ISKU_SYSFS_RW(keys_media, KEYS_MEDIA)
 212ISKU_SYSFS_RW(keys_thumbster, KEYS_THUMBSTER)
 213ISKU_SYSFS_RW(keys_macro, KEYS_MACRO)
 214ISKU_SYSFS_RW(keys_capslock, KEYS_CAPSLOCK)
 215ISKU_SYSFS_RW(light, LIGHT)
 216ISKU_SYSFS_RW(key_mask, KEY_MASK)
 217ISKU_SYSFS_RW(last_set, LAST_SET)
 218ISKU_SYSFS_W(talk, TALK)
 219ISKU_SYSFS_R(info, INFO)
 220ISKU_SYSFS_W(control, CONTROL)
 221ISKU_SYSFS_W(reset, RESET)
 222
 223static struct bin_attribute isku_bin_attributes[] = {
 224        ISKU_BIN_ATTR_RW(macro, MACRO),
 225        ISKU_BIN_ATTR_RW(keys_function, KEYS_FUNCTION),
 226        ISKU_BIN_ATTR_RW(keys_easyzone, KEYS_EASYZONE),
 227        ISKU_BIN_ATTR_RW(keys_media, KEYS_MEDIA),
 228        ISKU_BIN_ATTR_RW(keys_thumbster, KEYS_THUMBSTER),
 229        ISKU_BIN_ATTR_RW(keys_macro, KEYS_MACRO),
 230        ISKU_BIN_ATTR_RW(keys_capslock, KEYS_CAPSLOCK),
 231        ISKU_BIN_ATTR_RW(light, LIGHT),
 232        ISKU_BIN_ATTR_RW(key_mask, KEY_MASK),
 233        ISKU_BIN_ATTR_RW(last_set, LAST_SET),
 234        ISKU_BIN_ATTR_W(talk, TALK),
 235        ISKU_BIN_ATTR_R(info, INFO),
 236        ISKU_BIN_ATTR_W(control, CONTROL),
 237        ISKU_BIN_ATTR_W(reset, RESET),
 238        __ATTR_NULL
 239};
 240
 241static int isku_init_isku_device_struct(struct usb_device *usb_dev,
 242                struct isku_device *isku)
 243{
 244        int retval;
 245
 246        mutex_init(&isku->isku_lock);
 247
 248        retval = isku_get_actual_profile(usb_dev);
 249        if (retval < 0)
 250                return retval;
 251        isku_profile_activated(isku, retval);
 252
 253        return 0;
 254}
 255
 256static int isku_init_specials(struct hid_device *hdev)
 257{
 258        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 259        struct usb_device *usb_dev = interface_to_usbdev(intf);
 260        struct isku_device *isku;
 261        int retval;
 262
 263        if (intf->cur_altsetting->desc.bInterfaceProtocol
 264                        != ISKU_USB_INTERFACE_PROTOCOL) {
 265                hid_set_drvdata(hdev, NULL);
 266                return 0;
 267        }
 268
 269        isku = kzalloc(sizeof(*isku), GFP_KERNEL);
 270        if (!isku) {
 271                hid_err(hdev, "can't alloc device descriptor\n");
 272                return -ENOMEM;
 273        }
 274        hid_set_drvdata(hdev, isku);
 275
 276        retval = isku_init_isku_device_struct(usb_dev, isku);
 277        if (retval) {
 278                hid_err(hdev, "couldn't init struct isku_device\n");
 279                goto exit_free;
 280        }
 281
 282        retval = roccat_connect(isku_class, hdev,
 283                        sizeof(struct isku_roccat_report));
 284        if (retval < 0) {
 285                hid_err(hdev, "couldn't init char dev\n");
 286        } else {
 287                isku->chrdev_minor = retval;
 288                isku->roccat_claimed = 1;
 289        }
 290
 291        return 0;
 292exit_free:
 293        kfree(isku);
 294        return retval;
 295}
 296
 297static void isku_remove_specials(struct hid_device *hdev)
 298{
 299        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 300        struct isku_device *isku;
 301
 302        if (intf->cur_altsetting->desc.bInterfaceProtocol
 303                        != ISKU_USB_INTERFACE_PROTOCOL)
 304                return;
 305
 306        isku = hid_get_drvdata(hdev);
 307        if (isku->roccat_claimed)
 308                roccat_disconnect(isku->chrdev_minor);
 309        kfree(isku);
 310}
 311
 312static int isku_probe(struct hid_device *hdev,
 313                const struct hid_device_id *id)
 314{
 315        int retval;
 316
 317        retval = hid_parse(hdev);
 318        if (retval) {
 319                hid_err(hdev, "parse failed\n");
 320                goto exit;
 321        }
 322
 323        retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 324        if (retval) {
 325                hid_err(hdev, "hw start failed\n");
 326                goto exit;
 327        }
 328
 329        retval = isku_init_specials(hdev);
 330        if (retval) {
 331                hid_err(hdev, "couldn't install keyboard\n");
 332                goto exit_stop;
 333        }
 334
 335        return 0;
 336
 337exit_stop:
 338        hid_hw_stop(hdev);
 339exit:
 340        return retval;
 341}
 342
 343static void isku_remove(struct hid_device *hdev)
 344{
 345        isku_remove_specials(hdev);
 346        hid_hw_stop(hdev);
 347}
 348
 349static void isku_keep_values_up_to_date(struct isku_device *isku,
 350                u8 const *data)
 351{
 352        struct isku_report_button const *button_report;
 353
 354        switch (data[0]) {
 355        case ISKU_REPORT_NUMBER_BUTTON:
 356                button_report = (struct isku_report_button const *)data;
 357                switch (button_report->event) {
 358                case ISKU_REPORT_BUTTON_EVENT_PROFILE:
 359                        isku_profile_activated(isku, button_report->data1 - 1);
 360                        break;
 361                }
 362                break;
 363        }
 364}
 365
 366static void isku_report_to_chrdev(struct isku_device const *isku,
 367                u8 const *data)
 368{
 369        struct isku_roccat_report roccat_report;
 370        struct isku_report_button const *button_report;
 371
 372        if (data[0] != ISKU_REPORT_NUMBER_BUTTON)
 373                return;
 374
 375        button_report = (struct isku_report_button const *)data;
 376
 377        roccat_report.event = button_report->event;
 378        roccat_report.data1 = button_report->data1;
 379        roccat_report.data2 = button_report->data2;
 380        roccat_report.profile = isku->actual_profile + 1;
 381        roccat_report_event(isku->chrdev_minor,
 382                        (uint8_t const *)&roccat_report);
 383}
 384
 385static int isku_raw_event(struct hid_device *hdev,
 386                struct hid_report *report, u8 *data, int size)
 387{
 388        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 389        struct isku_device *isku = hid_get_drvdata(hdev);
 390
 391        if (intf->cur_altsetting->desc.bInterfaceProtocol
 392                        != ISKU_USB_INTERFACE_PROTOCOL)
 393                return 0;
 394
 395        if (isku == NULL)
 396                return 0;
 397
 398        isku_keep_values_up_to_date(isku, data);
 399
 400        if (isku->roccat_claimed)
 401                isku_report_to_chrdev(isku, data);
 402
 403        return 0;
 404}
 405
 406static const struct hid_device_id isku_devices[] = {
 407        { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKU) },
 408        { }
 409};
 410
 411MODULE_DEVICE_TABLE(hid, isku_devices);
 412
 413static struct hid_driver isku_driver = {
 414                .name = "isku",
 415                .id_table = isku_devices,
 416                .probe = isku_probe,
 417                .remove = isku_remove,
 418                .raw_event = isku_raw_event
 419};
 420
 421static int __init isku_init(void)
 422{
 423        int retval;
 424        isku_class = class_create(THIS_MODULE, "isku");
 425        if (IS_ERR(isku_class))
 426                return PTR_ERR(isku_class);
 427        isku_class->dev_attrs = isku_attributes;
 428        isku_class->dev_bin_attrs = isku_bin_attributes;
 429
 430        retval = hid_register_driver(&isku_driver);
 431        if (retval)
 432                class_destroy(isku_class);
 433        return retval;
 434}
 435
 436static void __exit isku_exit(void)
 437{
 438        hid_unregister_driver(&isku_driver);
 439        class_destroy(isku_class);
 440}
 441
 442module_init(isku_init);
 443module_exit(isku_exit);
 444
 445MODULE_AUTHOR("Stefan Achatz");
 446MODULE_DESCRIPTION("USB Roccat Isku driver");
 447MODULE_LICENSE("GPL v2");
 448
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