1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Roccat Isku driver for Linux 4 * 5 * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net> 6 */ 7 8 /* 9 */ 10 11 /* 12 * Roccat Isku is a gamer keyboard with macro keys that can be configured in 13 * 5 profiles. 14 */ 15 16 #include <linux/device.h> 17 #include <linux/input.h> 18 #include <linux/hid.h> 19 #include <linux/module.h> 20 #include <linux/slab.h> 21 #include <linux/hid-roccat.h> 22 #include "hid-ids.h" 23 #include "hid-roccat-common.h" 24 #include "hid-roccat-isku.h" 25 26 static struct class *isku_class; 27 28 static void isku_profile_activated(struct isku_device *isku, uint new_profile) 29 { 30 isku->actual_profile = new_profile; 31 } 32 33 static int isku_receive(struct usb_device *usb_dev, uint command, 34 void *buf, uint size) 35 { 36 return roccat_common2_receive(usb_dev, command, buf, size); 37 } 38 39 static int isku_get_actual_profile(struct usb_device *usb_dev) 40 { 41 struct isku_actual_profile buf; 42 int retval; 43 44 retval = isku_receive(usb_dev, ISKU_COMMAND_ACTUAL_PROFILE, 45 &buf, sizeof(struct isku_actual_profile)); 46 return retval ? retval : buf.actual_profile; 47 } 48 49 static int isku_set_actual_profile(struct usb_device *usb_dev, int new_profile) 50 { 51 struct isku_actual_profile buf; 52 53 buf.command = ISKU_COMMAND_ACTUAL_PROFILE; 54 buf.size = sizeof(struct isku_actual_profile); 55 buf.actual_profile = new_profile; 56 return roccat_common2_send_with_status(usb_dev, 57 ISKU_COMMAND_ACTUAL_PROFILE, &buf, 58 sizeof(struct isku_actual_profile)); 59 } 60 61 static ssize_t isku_sysfs_show_actual_profile(struct device *dev, 62 struct device_attribute *attr, char *buf) 63 { 64 struct isku_device *isku = 65 hid_get_drvdata(dev_get_drvdata(dev->parent->parent)); 66 return snprintf(buf, PAGE_SIZE, "%d\n", isku->actual_profile); 67 } 68 69 static ssize_t isku_sysfs_set_actual_profile(struct device *dev, 70 struct device_attribute *attr, char const *buf, size_t size) 71 { 72 struct isku_device *isku; 73 struct usb_device *usb_dev; 74 unsigned long profile; 75 int retval; 76 struct isku_roccat_report roccat_report; 77 78 dev = dev->parent->parent; 79 isku = hid_get_drvdata(dev_get_drvdata(dev)); 80 usb_dev = interface_to_usbdev(to_usb_interface(dev)); 81 82 retval = kstrtoul(buf, 10, &profile); 83 if (retval) 84 return retval; 85 86 if (profile > 4) 87 return -EINVAL; 88 89 mutex_lock(&isku->isku_lock); 90 91 retval = isku_set_actual_profile(usb_dev, profile); 92 if (retval) { 93 mutex_unlock(&isku->isku_lock); 94 return retval; 95 } 96 97 isku_profile_activated(isku, profile); 98 99 roccat_report.event = ISKU_REPORT_BUTTON_EVENT_PROFILE; 100 roccat_report.data1 = profile + 1; 101 roccat_report.data2 = 0; 102 roccat_report.profile = profile + 1; 103 roccat_report_event(isku->chrdev_minor, (uint8_t const *)&roccat_report); 104 105 mutex_unlock(&isku->isku_lock); 106 107 return size; 108 } 109 static DEVICE_ATTR(actual_profile, 0660, isku_sysfs_show_actual_profile, 110 isku_sysfs_set_actual_profile); 111 112 static struct attribute *isku_attrs[] = { 113 &dev_attr_actual_profile.attr, 114 NULL, 115 }; 116 117 static ssize_t isku_sysfs_read(struct file *fp, struct kobject *kobj, 118 char *buf, loff_t off, size_t count, 119 size_t real_size, uint command) 120 { 121 struct device *dev = kobj_to_dev(kobj)->parent->parent; 122 struct isku_device *isku = hid_get_drvdata(dev_get_drvdata(dev)); 123 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev)); 124 int retval; 125 126 if (off >= real_size) 127 return 0; 128 129 if (off != 0 || count > real_size) 130 return -EINVAL; 131 132 mutex_lock(&isku->isku_lock); 133 retval = isku_receive(usb_dev, command, buf, count); 134 mutex_unlock(&isku->isku_lock); 135 136 return retval ? retval : count; 137 } 138 139 static ssize_t isku_sysfs_write(struct file *fp, struct kobject *kobj, 140 void const *buf, loff_t off, size_t count, 141 size_t real_size, uint command) 142 { 143 struct device *dev = kobj_to_dev(kobj)->parent->parent; 144 struct isku_device *isku = hid_get_drvdata(dev_get_drvdata(dev)); 145 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev)); 146 int retval; 147 148 if (off != 0 || count > real_size) 149 return -EINVAL; 150 151 mutex_lock(&isku->isku_lock); 152 retval = roccat_common2_send_with_status(usb_dev, command, 153 (void *)buf, count); 154 mutex_unlock(&isku->isku_lock); 155 156 return retval ? retval : count; 157 } 158 159 #define ISKU_SYSFS_W(thingy, THINGY) \ 160 static ssize_t isku_sysfs_write_ ## thingy(struct file *fp, struct kobject *kobj, \ 161 struct bin_attribute *attr, char *buf, \ 162 loff_t off, size_t count) \ 163 { \ 164 return isku_sysfs_write(fp, kobj, buf, off, count, \ 165 ISKU_SIZE_ ## THINGY, ISKU_COMMAND_ ## THINGY); \ 166 } 167 168 #define ISKU_SYSFS_R(thingy, THINGY) \ 169 static ssize_t isku_sysfs_read_ ## thingy(struct file *fp, struct kobject *kobj, \ 170 struct bin_attribute *attr, char *buf, \ 171 loff_t off, size_t count) \ 172 { \ 173 return isku_sysfs_read(fp, kobj, buf, off, count, \ 174 ISKU_SIZE_ ## THINGY, ISKU_COMMAND_ ## THINGY); \ 175 } 176 177 #define ISKU_SYSFS_RW(thingy, THINGY) \ 178 ISKU_SYSFS_R(thingy, THINGY) \ 179 ISKU_SYSFS_W(thingy, THINGY) 180 181 #define ISKU_BIN_ATTR_RW(thingy, THINGY) \ 182 ISKU_SYSFS_RW(thingy, THINGY); \ 183 static struct bin_attribute bin_attr_##thingy = { \ 184 .attr = { .name = #thingy, .mode = 0660 }, \ 185 .size = ISKU_SIZE_ ## THINGY, \ 186 .read = isku_sysfs_read_ ## thingy, \ 187 .write = isku_sysfs_write_ ## thingy \ 188 } 189 190 #define ISKU_BIN_ATTR_R(thingy, THINGY) \ 191 ISKU_SYSFS_R(thingy, THINGY); \ 192 static struct bin_attribute bin_attr_##thingy = { \ 193 .attr = { .name = #thingy, .mode = 0440 }, \ 194 .size = ISKU_SIZE_ ## THINGY, \ 195 .read = isku_sysfs_read_ ## thingy, \ 196 } 197 198 #define ISKU_BIN_ATTR_W(thingy, THINGY) \ 199 ISKU_SYSFS_W(thingy, THINGY); \ 200 static struct bin_attribute bin_attr_##thingy = { \ 201 .attr = { .name = #thingy, .mode = 0220 }, \ 202 .size = ISKU_SIZE_ ## THINGY, \ 203 .write = isku_sysfs_write_ ## thingy \ 204 } 205 206 ISKU_BIN_ATTR_RW(macro, MACRO); 207 ISKU_BIN_ATTR_RW(keys_function, KEYS_FUNCTION); 208 ISKU_BIN_ATTR_RW(keys_easyzone, KEYS_EASYZONE); 209 ISKU_BIN_ATTR_RW(keys_media, KEYS_MEDIA); 210 ISKU_BIN_ATTR_RW(keys_thumbster, KEYS_THUMBSTER); 211 ISKU_BIN_ATTR_RW(keys_macro, KEYS_MACRO); 212 ISKU_BIN_ATTR_RW(keys_capslock, KEYS_CAPSLOCK); 213 ISKU_BIN_ATTR_RW(light, LIGHT); 214 ISKU_BIN_ATTR_RW(key_mask, KEY_MASK); 215 ISKU_BIN_ATTR_RW(last_set, LAST_SET); 216 ISKU_BIN_ATTR_W(talk, TALK); 217 ISKU_BIN_ATTR_W(talkfx, TALKFX); 218 ISKU_BIN_ATTR_W(control, CONTROL); 219 ISKU_BIN_ATTR_W(reset, RESET); 220 ISKU_BIN_ATTR_R(info, INFO); 221 222 static struct bin_attribute *isku_bin_attributes[] = { 223 &bin_attr_macro, 224 &bin_attr_keys_function, 225 &bin_attr_keys_easyzone, 226 &bin_attr_keys_media, 227 &bin_attr_keys_thumbster, 228 &bin_attr_keys_macro, 229 &bin_attr_keys_capslock, 230 &bin_attr_light, 231 &bin_attr_key_mask, 232 &bin_attr_last_set, 233 &bin_attr_talk, 234 &bin_attr_talkfx, 235 &bin_attr_control, 236 &bin_attr_reset, 237 &bin_attr_info, 238 NULL, 239 }; 240 241 static const struct attribute_group isku_group = { 242 .attrs = isku_attrs, 243 .bin_attrs = isku_bin_attributes, 244 }; 245 246 static const struct attribute_group *isku_groups[] = { 247 &isku_group, 248 NULL, 249 }; 250 251 static int isku_init_isku_device_struct(struct usb_device *usb_dev, 252 struct isku_device *isku) 253 { 254 int retval; 255 256 mutex_init(&isku->isku_lock); 257 258 retval = isku_get_actual_profile(usb_dev); 259 if (retval < 0) 260 return retval; 261 isku_profile_activated(isku, retval); 262 263 return 0; 264 } 265 266 static int isku_init_specials(struct hid_device *hdev) 267 { 268 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 269 struct usb_device *usb_dev = interface_to_usbdev(intf); 270 struct isku_device *isku; 271 int retval; 272 273 if (intf->cur_altsetting->desc.bInterfaceProtocol 274 != ISKU_USB_INTERFACE_PROTOCOL) { 275 hid_set_drvdata(hdev, NULL); 276 return 0; 277 } 278 279 isku = kzalloc(sizeof(*isku), GFP_KERNEL); 280 if (!isku) { 281 hid_err(hdev, "can't alloc device descriptor\n"); 282 return -ENOMEM; 283 } 284 hid_set_drvdata(hdev, isku); 285 286 retval = isku_init_isku_device_struct(usb_dev, isku); 287 if (retval) { 288 hid_err(hdev, "couldn't init struct isku_device\n"); 289 goto exit_free; 290 } 291 292 retval = roccat_connect(isku_class, hdev, 293 sizeof(struct isku_roccat_report)); 294 if (retval < 0) { 295 hid_err(hdev, "couldn't init char dev\n"); 296 } else { 297 isku->chrdev_minor = retval; 298 isku->roccat_claimed = 1; 299 } 300 301 return 0; 302 exit_free: 303 kfree(isku); 304 return retval; 305 } 306 307 static void isku_remove_specials(struct hid_device *hdev) 308 { 309 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 310 struct isku_device *isku; 311 312 if (intf->cur_altsetting->desc.bInterfaceProtocol 313 != ISKU_USB_INTERFACE_PROTOCOL) 314 return; 315 316 isku = hid_get_drvdata(hdev); 317 if (isku->roccat_claimed) 318 roccat_disconnect(isku->chrdev_minor); 319 kfree(isku); 320 } 321 322 static int isku_probe(struct hid_device *hdev, 323 const struct hid_device_id *id) 324 { 325 int retval; 326 327 retval = hid_parse(hdev); 328 if (retval) { 329 hid_err(hdev, "parse failed\n"); 330 goto exit; 331 } 332 333 retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 334 if (retval) { 335 hid_err(hdev, "hw start failed\n"); 336 goto exit; 337 } 338 339 retval = isku_init_specials(hdev); 340 if (retval) { 341 hid_err(hdev, "couldn't install keyboard\n"); 342 goto exit_stop; 343 } 344 345 return 0; 346 347 exit_stop: 348 hid_hw_stop(hdev); 349 exit: 350 return retval; 351 } 352 353 static void isku_remove(struct hid_device *hdev) 354 { 355 isku_remove_specials(hdev); 356 hid_hw_stop(hdev); 357 } 358 359 static void isku_keep_values_up_to_date(struct isku_device *isku, 360 u8 const *data) 361 { 362 struct isku_report_button const *button_report; 363 364 switch (data[0]) { 365 case ISKU_REPORT_NUMBER_BUTTON: 366 button_report = (struct isku_report_button const *)data; 367 switch (button_report->event) { 368 case ISKU_REPORT_BUTTON_EVENT_PROFILE: 369 isku_profile_activated(isku, button_report->data1 - 1); 370 break; 371 } 372 break; 373 } 374 } 375 376 static void isku_report_to_chrdev(struct isku_device const *isku, 377 u8 const *data) 378 { 379 struct isku_roccat_report roccat_report; 380 struct isku_report_button const *button_report; 381 382 if (data[0] != ISKU_REPORT_NUMBER_BUTTON) 383 return; 384 385 button_report = (struct isku_report_button const *)data; 386 387 roccat_report.event = button_report->event; 388 roccat_report.data1 = button_report->data1; 389 roccat_report.data2 = button_report->data2; 390 roccat_report.profile = isku->actual_profile + 1; 391 roccat_report_event(isku->chrdev_minor, 392 (uint8_t const *)&roccat_report); 393 } 394 395 static int isku_raw_event(struct hid_device *hdev, 396 struct hid_report *report, u8 *data, int size) 397 { 398 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 399 struct isku_device *isku = hid_get_drvdata(hdev); 400 401 if (intf->cur_altsetting->desc.bInterfaceProtocol 402 != ISKU_USB_INTERFACE_PROTOCOL) 403 return 0; 404 405 if (isku == NULL) 406 return 0; 407 408 isku_keep_values_up_to_date(isku, data); 409 410 if (isku->roccat_claimed) 411 isku_report_to_chrdev(isku, data); 412 413 return 0; 414 } 415 416 static const struct hid_device_id isku_devices[] = { 417 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKU) }, 418 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKUFX) }, 419 { } 420 }; 421 422 MODULE_DEVICE_TABLE(hid, isku_devices); 423 424 static struct hid_driver isku_driver = { 425 .name = "isku", 426 .id_table = isku_devices, 427 .probe = isku_probe, 428 .remove = isku_remove, 429 .raw_event = isku_raw_event 430 }; 431 432 static int __init isku_init(void) 433 { 434 int retval; 435 isku_class = class_create(THIS_MODULE, "isku"); 436 if (IS_ERR(isku_class)) 437 return PTR_ERR(isku_class); 438 isku_class->dev_groups = isku_groups; 439 440 retval = hid_register_driver(&isku_driver); 441 if (retval) 442 class_destroy(isku_class); 443 return retval; 444 } 445 446 static void __exit isku_exit(void) 447 { 448 hid_unregister_driver(&isku_driver); 449 class_destroy(isku_class); 450 } 451 452 module_init(isku_init); 453 module_exit(isku_exit); 454 455 MODULE_AUTHOR("Stefan Achatz"); 456 MODULE_DESCRIPTION("USB Roccat Isku/FX driver"); 457 MODULE_LICENSE("GPL v2"); 458