1 /* 2 * HID driver for Logitech Unifying receivers 3 * 4 * Copyright (c) 2011 Logitech 5 */ 6 7 /* 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 25 #include <linux/device.h> 26 #include <linux/hid.h> 27 #include <linux/module.h> 28 #include <linux/usb.h> 29 #include <linux/kfifo.h> 30 #include <asm/unaligned.h> 31 #include "hid-ids.h" 32 33 #define DJ_MAX_PAIRED_DEVICES 6 34 #define DJ_MAX_NUMBER_NOTIFICATIONS 8 35 #define DJ_RECEIVER_INDEX 0 36 #define DJ_DEVICE_INDEX_MIN 1 37 #define DJ_DEVICE_INDEX_MAX 6 38 39 #define DJREPORT_SHORT_LENGTH 15 40 #define DJREPORT_LONG_LENGTH 32 41 42 #define REPORT_ID_DJ_SHORT 0x20 43 #define REPORT_ID_DJ_LONG 0x21 44 45 #define REPORT_ID_HIDPP_SHORT 0x10 46 #define REPORT_ID_HIDPP_LONG 0x11 47 48 #define HIDPP_REPORT_SHORT_LENGTH 7 49 #define HIDPP_REPORT_LONG_LENGTH 20 50 51 #define HIDPP_RECEIVER_INDEX 0xff 52 53 #define REPORT_TYPE_RFREPORT_FIRST 0x01 54 #define REPORT_TYPE_RFREPORT_LAST 0x1F 55 56 /* Command Switch to DJ mode */ 57 #define REPORT_TYPE_CMD_SWITCH 0x80 58 #define CMD_SWITCH_PARAM_DEVBITFIELD 0x00 59 #define CMD_SWITCH_PARAM_TIMEOUT_SECONDS 0x01 60 #define TIMEOUT_NO_KEEPALIVE 0x00 61 62 /* Command to Get the list of Paired devices */ 63 #define REPORT_TYPE_CMD_GET_PAIRED_DEVICES 0x81 64 65 /* Device Paired Notification */ 66 #define REPORT_TYPE_NOTIF_DEVICE_PAIRED 0x41 67 #define SPFUNCTION_MORE_NOTIF_EXPECTED 0x01 68 #define SPFUNCTION_DEVICE_LIST_EMPTY 0x02 69 #define DEVICE_PAIRED_PARAM_SPFUNCTION 0x00 70 #define DEVICE_PAIRED_PARAM_EQUAD_ID_LSB 0x01 71 #define DEVICE_PAIRED_PARAM_EQUAD_ID_MSB 0x02 72 #define DEVICE_PAIRED_RF_REPORT_TYPE 0x03 73 74 /* Device Un-Paired Notification */ 75 #define REPORT_TYPE_NOTIF_DEVICE_UNPAIRED 0x40 76 77 78 /* Connection Status Notification */ 79 #define REPORT_TYPE_NOTIF_CONNECTION_STATUS 0x42 80 #define CONNECTION_STATUS_PARAM_STATUS 0x00 81 #define STATUS_LINKLOSS 0x01 82 83 /* Error Notification */ 84 #define REPORT_TYPE_NOTIF_ERROR 0x7F 85 #define NOTIF_ERROR_PARAM_ETYPE 0x00 86 #define ETYPE_KEEPALIVE_TIMEOUT 0x01 87 88 /* supported DJ HID && RF report types */ 89 #define REPORT_TYPE_KEYBOARD 0x01 90 #define REPORT_TYPE_MOUSE 0x02 91 #define REPORT_TYPE_CONSUMER_CONTROL 0x03 92 #define REPORT_TYPE_SYSTEM_CONTROL 0x04 93 #define REPORT_TYPE_MEDIA_CENTER 0x08 94 #define REPORT_TYPE_LEDS 0x0E 95 96 /* RF Report types bitfield */ 97 #define STD_KEYBOARD 0x00000002 98 #define STD_MOUSE 0x00000004 99 #define MULTIMEDIA 0x00000008 100 #define POWER_KEYS 0x00000010 101 #define MEDIA_CENTER 0x00000100 102 #define KBD_LEDS 0x00004000 103 104 struct dj_report { 105 u8 report_id; 106 u8 device_index; 107 u8 report_type; 108 u8 report_params[DJREPORT_SHORT_LENGTH - 3]; 109 }; 110 111 struct dj_receiver_dev { 112 struct hid_device *hdev; 113 struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES + 114 DJ_DEVICE_INDEX_MIN]; 115 struct work_struct work; 116 struct kfifo notif_fifo; 117 spinlock_t lock; 118 bool querying_devices; 119 }; 120 121 struct dj_device { 122 struct hid_device *hdev; 123 struct dj_receiver_dev *dj_receiver_dev; 124 u32 reports_supported; 125 u8 device_index; 126 }; 127 128 /* Keyboard descriptor (1) */ 129 static const char kbd_descriptor[] = { 130 0x05, 0x01, /* USAGE_PAGE (generic Desktop) */ 131 0x09, 0x06, /* USAGE (Keyboard) */ 132 0xA1, 0x01, /* COLLECTION (Application) */ 133 0x85, 0x01, /* REPORT_ID (1) */ 134 0x95, 0x08, /* REPORT_COUNT (8) */ 135 0x75, 0x01, /* REPORT_SIZE (1) */ 136 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 137 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 138 0x05, 0x07, /* USAGE_PAGE (Keyboard) */ 139 0x19, 0xE0, /* USAGE_MINIMUM (Left Control) */ 140 0x29, 0xE7, /* USAGE_MAXIMUM (Right GUI) */ 141 0x81, 0x02, /* INPUT (Data,Var,Abs) */ 142 0x95, 0x06, /* REPORT_COUNT (6) */ 143 0x75, 0x08, /* REPORT_SIZE (8) */ 144 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 145 0x26, 0xFF, 0x00, /* LOGICAL_MAXIMUM (255) */ 146 0x05, 0x07, /* USAGE_PAGE (Keyboard) */ 147 0x19, 0x00, /* USAGE_MINIMUM (no event) */ 148 0x2A, 0xFF, 0x00, /* USAGE_MAXIMUM (reserved) */ 149 0x81, 0x00, /* INPUT (Data,Ary,Abs) */ 150 0x85, 0x0e, /* REPORT_ID (14) */ 151 0x05, 0x08, /* USAGE PAGE (LED page) */ 152 0x95, 0x05, /* REPORT COUNT (5) */ 153 0x75, 0x01, /* REPORT SIZE (1) */ 154 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 155 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 156 0x19, 0x01, /* USAGE MINIMUM (1) */ 157 0x29, 0x05, /* USAGE MAXIMUM (5) */ 158 0x91, 0x02, /* OUTPUT (Data, Variable, Absolute) */ 159 0x95, 0x01, /* REPORT COUNT (1) */ 160 0x75, 0x03, /* REPORT SIZE (3) */ 161 0x91, 0x01, /* OUTPUT (Constant) */ 162 0xC0 163 }; 164 165 /* Mouse descriptor (2) */ 166 static const char mse_descriptor[] = { 167 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 168 0x09, 0x02, /* USAGE (Mouse) */ 169 0xA1, 0x01, /* COLLECTION (Application) */ 170 0x85, 0x02, /* REPORT_ID = 2 */ 171 0x09, 0x01, /* USAGE (pointer) */ 172 0xA1, 0x00, /* COLLECTION (physical) */ 173 0x05, 0x09, /* USAGE_PAGE (buttons) */ 174 0x19, 0x01, /* USAGE_MIN (1) */ 175 0x29, 0x10, /* USAGE_MAX (16) */ 176 0x15, 0x00, /* LOGICAL_MIN (0) */ 177 0x25, 0x01, /* LOGICAL_MAX (1) */ 178 0x95, 0x10, /* REPORT_COUNT (16) */ 179 0x75, 0x01, /* REPORT_SIZE (1) */ 180 0x81, 0x02, /* INPUT (data var abs) */ 181 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 182 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ 183 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ 184 0x75, 0x0C, /* REPORT_SIZE (12) */ 185 0x95, 0x02, /* REPORT_COUNT (2) */ 186 0x09, 0x30, /* USAGE (X) */ 187 0x09, 0x31, /* USAGE (Y) */ 188 0x81, 0x06, /* INPUT */ 189 0x15, 0x81, /* LOGICAL_MIN (-127) */ 190 0x25, 0x7F, /* LOGICAL_MAX (127) */ 191 0x75, 0x08, /* REPORT_SIZE (8) */ 192 0x95, 0x01, /* REPORT_COUNT (1) */ 193 0x09, 0x38, /* USAGE (wheel) */ 194 0x81, 0x06, /* INPUT */ 195 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 196 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 197 0x95, 0x01, /* REPORT_COUNT (1) */ 198 0x81, 0x06, /* INPUT */ 199 0xC0, /* END_COLLECTION */ 200 0xC0, /* END_COLLECTION */ 201 }; 202 203 /* Consumer Control descriptor (3) */ 204 static const char consumer_descriptor[] = { 205 0x05, 0x0C, /* USAGE_PAGE (Consumer Devices) */ 206 0x09, 0x01, /* USAGE (Consumer Control) */ 207 0xA1, 0x01, /* COLLECTION (Application) */ 208 0x85, 0x03, /* REPORT_ID = 3 */ 209 0x75, 0x10, /* REPORT_SIZE (16) */ 210 0x95, 0x02, /* REPORT_COUNT (2) */ 211 0x15, 0x01, /* LOGICAL_MIN (1) */ 212 0x26, 0x8C, 0x02, /* LOGICAL_MAX (652) */ 213 0x19, 0x01, /* USAGE_MIN (1) */ 214 0x2A, 0x8C, 0x02, /* USAGE_MAX (652) */ 215 0x81, 0x00, /* INPUT (Data Ary Abs) */ 216 0xC0, /* END_COLLECTION */ 217 }; /* */ 218 219 /* System control descriptor (4) */ 220 static const char syscontrol_descriptor[] = { 221 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 222 0x09, 0x80, /* USAGE (System Control) */ 223 0xA1, 0x01, /* COLLECTION (Application) */ 224 0x85, 0x04, /* REPORT_ID = 4 */ 225 0x75, 0x02, /* REPORT_SIZE (2) */ 226 0x95, 0x01, /* REPORT_COUNT (1) */ 227 0x15, 0x01, /* LOGICAL_MIN (1) */ 228 0x25, 0x03, /* LOGICAL_MAX (3) */ 229 0x09, 0x82, /* USAGE (System Sleep) */ 230 0x09, 0x81, /* USAGE (System Power Down) */ 231 0x09, 0x83, /* USAGE (System Wake Up) */ 232 0x81, 0x60, /* INPUT (Data Ary Abs NPrf Null) */ 233 0x75, 0x06, /* REPORT_SIZE (6) */ 234 0x81, 0x03, /* INPUT (Cnst Var Abs) */ 235 0xC0, /* END_COLLECTION */ 236 }; 237 238 /* Media descriptor (8) */ 239 static const char media_descriptor[] = { 240 0x06, 0xbc, 0xff, /* Usage Page 0xffbc */ 241 0x09, 0x88, /* Usage 0x0088 */ 242 0xa1, 0x01, /* BeginCollection */ 243 0x85, 0x08, /* Report ID 8 */ 244 0x19, 0x01, /* Usage Min 0x0001 */ 245 0x29, 0xff, /* Usage Max 0x00ff */ 246 0x15, 0x01, /* Logical Min 1 */ 247 0x26, 0xff, 0x00, /* Logical Max 255 */ 248 0x75, 0x08, /* Report Size 8 */ 249 0x95, 0x01, /* Report Count 1 */ 250 0x81, 0x00, /* Input */ 251 0xc0, /* EndCollection */ 252 }; /* */ 253 254 /* HIDPP descriptor */ 255 static const char hidpp_descriptor[] = { 256 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 257 0x09, 0x01, /* Usage (Vendor Usage 1) */ 258 0xa1, 0x01, /* Collection (Application) */ 259 0x85, 0x10, /* Report ID (16) */ 260 0x75, 0x08, /* Report Size (8) */ 261 0x95, 0x06, /* Report Count (6) */ 262 0x15, 0x00, /* Logical Minimum (0) */ 263 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 264 0x09, 0x01, /* Usage (Vendor Usage 1) */ 265 0x81, 0x00, /* Input (Data,Arr,Abs) */ 266 0x09, 0x01, /* Usage (Vendor Usage 1) */ 267 0x91, 0x00, /* Output (Data,Arr,Abs) */ 268 0xc0, /* End Collection */ 269 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 270 0x09, 0x02, /* Usage (Vendor Usage 2) */ 271 0xa1, 0x01, /* Collection (Application) */ 272 0x85, 0x11, /* Report ID (17) */ 273 0x75, 0x08, /* Report Size (8) */ 274 0x95, 0x13, /* Report Count (19) */ 275 0x15, 0x00, /* Logical Minimum (0) */ 276 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 277 0x09, 0x02, /* Usage (Vendor Usage 2) */ 278 0x81, 0x00, /* Input (Data,Arr,Abs) */ 279 0x09, 0x02, /* Usage (Vendor Usage 2) */ 280 0x91, 0x00, /* Output (Data,Arr,Abs) */ 281 0xc0, /* End Collection */ 282 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 283 0x09, 0x04, /* Usage (Vendor Usage 0x04) */ 284 0xa1, 0x01, /* Collection (Application) */ 285 0x85, 0x20, /* Report ID (32) */ 286 0x75, 0x08, /* Report Size (8) */ 287 0x95, 0x0e, /* Report Count (14) */ 288 0x15, 0x00, /* Logical Minimum (0) */ 289 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 290 0x09, 0x41, /* Usage (Vendor Usage 0x41) */ 291 0x81, 0x00, /* Input (Data,Arr,Abs) */ 292 0x09, 0x41, /* Usage (Vendor Usage 0x41) */ 293 0x91, 0x00, /* Output (Data,Arr,Abs) */ 294 0x85, 0x21, /* Report ID (33) */ 295 0x95, 0x1f, /* Report Count (31) */ 296 0x15, 0x00, /* Logical Minimum (0) */ 297 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 298 0x09, 0x42, /* Usage (Vendor Usage 0x42) */ 299 0x81, 0x00, /* Input (Data,Arr,Abs) */ 300 0x09, 0x42, /* Usage (Vendor Usage 0x42) */ 301 0x91, 0x00, /* Output (Data,Arr,Abs) */ 302 0xc0, /* End Collection */ 303 }; 304 305 /* Maximum size of all defined hid reports in bytes (including report id) */ 306 #define MAX_REPORT_SIZE 8 307 308 /* Make sure all descriptors are present here */ 309 #define MAX_RDESC_SIZE \ 310 (sizeof(kbd_descriptor) + \ 311 sizeof(mse_descriptor) + \ 312 sizeof(consumer_descriptor) + \ 313 sizeof(syscontrol_descriptor) + \ 314 sizeof(media_descriptor) + \ 315 sizeof(hidpp_descriptor)) 316 317 /* Number of possible hid report types that can be created by this driver. 318 * 319 * Right now, RF report types have the same report types (or report id's) 320 * than the hid report created from those RF reports. In the future 321 * this doesnt have to be true. 322 * 323 * For instance, RF report type 0x01 which has a size of 8 bytes, corresponds 324 * to hid report id 0x01, this is standard keyboard. Same thing applies to mice 325 * reports and consumer control, etc. If a new RF report is created, it doesn't 326 * has to have the same report id as its corresponding hid report, so an 327 * translation may have to take place for future report types. 328 */ 329 #define NUMBER_OF_HID_REPORTS 32 330 static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = { 331 [1] = 8, /* Standard keyboard */ 332 [2] = 8, /* Standard mouse */ 333 [3] = 5, /* Consumer control */ 334 [4] = 2, /* System control */ 335 [8] = 2, /* Media Center */ 336 }; 337 338 339 #define LOGITECH_DJ_INTERFACE_NUMBER 0x02 340 341 static struct hid_ll_driver logi_dj_ll_driver; 342 343 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev); 344 345 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev, 346 struct dj_report *dj_report) 347 { 348 /* Called in delayed work context */ 349 struct dj_device *dj_dev; 350 unsigned long flags; 351 352 spin_lock_irqsave(&djrcv_dev->lock, flags); 353 dj_dev = djrcv_dev->paired_dj_devices[dj_report->device_index]; 354 djrcv_dev->paired_dj_devices[dj_report->device_index] = NULL; 355 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 356 357 if (dj_dev != NULL) { 358 hid_destroy_device(dj_dev->hdev); 359 kfree(dj_dev); 360 } else { 361 dev_err(&djrcv_dev->hdev->dev, "%s: can't destroy a NULL device\n", 362 __func__); 363 } 364 } 365 366 static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev, 367 struct dj_report *dj_report) 368 { 369 /* Called in delayed work context */ 370 struct hid_device *djrcv_hdev = djrcv_dev->hdev; 371 struct usb_interface *intf = to_usb_interface(djrcv_hdev->dev.parent); 372 struct usb_device *usbdev = interface_to_usbdev(intf); 373 struct hid_device *dj_hiddev; 374 struct dj_device *dj_dev; 375 376 /* Device index goes from 1 to 6, we need 3 bytes to store the 377 * semicolon, the index, and a null terminator 378 */ 379 unsigned char tmpstr[3]; 380 381 if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] & 382 SPFUNCTION_DEVICE_LIST_EMPTY) { 383 dbg_hid("%s: device list is empty\n", __func__); 384 djrcv_dev->querying_devices = false; 385 return; 386 } 387 388 if (djrcv_dev->paired_dj_devices[dj_report->device_index]) { 389 /* The device is already known. No need to reallocate it. */ 390 dbg_hid("%s: device is already known\n", __func__); 391 return; 392 } 393 394 dj_hiddev = hid_allocate_device(); 395 if (IS_ERR(dj_hiddev)) { 396 dev_err(&djrcv_hdev->dev, "%s: hid_allocate_device failed\n", 397 __func__); 398 return; 399 } 400 401 dj_hiddev->ll_driver = &logi_dj_ll_driver; 402 403 dj_hiddev->dev.parent = &djrcv_hdev->dev; 404 dj_hiddev->bus = BUS_USB; 405 dj_hiddev->vendor = le16_to_cpu(usbdev->descriptor.idVendor); 406 dj_hiddev->product = 407 (dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB] 408 << 8) | 409 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB]; 410 snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), 411 "Logitech Unifying Device. Wireless PID:%04x", 412 dj_hiddev->product); 413 414 dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE; 415 416 usb_make_path(usbdev, dj_hiddev->phys, sizeof(dj_hiddev->phys)); 417 snprintf(tmpstr, sizeof(tmpstr), ":%d", dj_report->device_index); 418 strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys)); 419 420 dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL); 421 422 if (!dj_dev) { 423 dev_err(&djrcv_hdev->dev, "%s: failed allocating dj_device\n", 424 __func__); 425 goto dj_device_allocate_fail; 426 } 427 428 dj_dev->reports_supported = get_unaligned_le32( 429 dj_report->report_params + DEVICE_PAIRED_RF_REPORT_TYPE); 430 dj_dev->hdev = dj_hiddev; 431 dj_dev->dj_receiver_dev = djrcv_dev; 432 dj_dev->device_index = dj_report->device_index; 433 dj_hiddev->driver_data = dj_dev; 434 435 djrcv_dev->paired_dj_devices[dj_report->device_index] = dj_dev; 436 437 if (hid_add_device(dj_hiddev)) { 438 dev_err(&djrcv_hdev->dev, "%s: failed adding dj_device\n", 439 __func__); 440 goto hid_add_device_fail; 441 } 442 443 return; 444 445 hid_add_device_fail: 446 djrcv_dev->paired_dj_devices[dj_report->device_index] = NULL; 447 kfree(dj_dev); 448 dj_device_allocate_fail: 449 hid_destroy_device(dj_hiddev); 450 } 451 452 static void delayedwork_callback(struct work_struct *work) 453 { 454 struct dj_receiver_dev *djrcv_dev = 455 container_of(work, struct dj_receiver_dev, work); 456 457 struct dj_report dj_report; 458 unsigned long flags; 459 int count; 460 int retval; 461 462 dbg_hid("%s\n", __func__); 463 464 spin_lock_irqsave(&djrcv_dev->lock, flags); 465 466 count = kfifo_out(&djrcv_dev->notif_fifo, &dj_report, 467 sizeof(struct dj_report)); 468 469 if (count != sizeof(struct dj_report)) { 470 dev_err(&djrcv_dev->hdev->dev, "%s: workitem triggered without " 471 "notifications available\n", __func__); 472 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 473 return; 474 } 475 476 if (!kfifo_is_empty(&djrcv_dev->notif_fifo)) { 477 if (schedule_work(&djrcv_dev->work) == 0) { 478 dbg_hid("%s: did not schedule the work item, was " 479 "already queued\n", __func__); 480 } 481 } 482 483 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 484 485 switch (dj_report.report_type) { 486 case REPORT_TYPE_NOTIF_DEVICE_PAIRED: 487 logi_dj_recv_add_djhid_device(djrcv_dev, &dj_report); 488 break; 489 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: 490 logi_dj_recv_destroy_djhid_device(djrcv_dev, &dj_report); 491 break; 492 default: 493 /* A normal report (i. e. not belonging to a pair/unpair notification) 494 * arriving here, means that the report arrived but we did not have a 495 * paired dj_device associated to the report's device_index, this 496 * means that the original "device paired" notification corresponding 497 * to this dj_device never arrived to this driver. The reason is that 498 * hid-core discards all packets coming from a device while probe() is 499 * executing. */ 500 if (!djrcv_dev->paired_dj_devices[dj_report.device_index]) { 501 /* ok, we don't know the device, just re-ask the 502 * receiver for the list of connected devices. */ 503 retval = logi_dj_recv_query_paired_devices(djrcv_dev); 504 if (!retval) { 505 /* everything went fine, so just leave */ 506 break; 507 } 508 dev_err(&djrcv_dev->hdev->dev, 509 "%s:logi_dj_recv_query_paired_devices " 510 "error:%d\n", __func__, retval); 511 } 512 dbg_hid("%s: unexpected report type\n", __func__); 513 } 514 } 515 516 static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev, 517 struct dj_report *dj_report) 518 { 519 /* We are called from atomic context (tasklet && djrcv->lock held) */ 520 521 kfifo_in(&djrcv_dev->notif_fifo, dj_report, sizeof(struct dj_report)); 522 523 if (schedule_work(&djrcv_dev->work) == 0) { 524 dbg_hid("%s: did not schedule the work item, was already " 525 "queued\n", __func__); 526 } 527 } 528 529 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev, 530 struct dj_report *dj_report) 531 { 532 /* We are called from atomic context (tasklet && djrcv->lock held) */ 533 unsigned int i; 534 u8 reportbuffer[MAX_REPORT_SIZE]; 535 struct dj_device *djdev; 536 537 djdev = djrcv_dev->paired_dj_devices[dj_report->device_index]; 538 539 memset(reportbuffer, 0, sizeof(reportbuffer)); 540 541 for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) { 542 if (djdev->reports_supported & (1 << i)) { 543 reportbuffer[0] = i; 544 if (hid_input_report(djdev->hdev, 545 HID_INPUT_REPORT, 546 reportbuffer, 547 hid_reportid_size_map[i], 1)) { 548 dbg_hid("hid_input_report error sending null " 549 "report\n"); 550 } 551 } 552 } 553 } 554 555 static void logi_dj_recv_forward_report(struct dj_receiver_dev *djrcv_dev, 556 struct dj_report *dj_report) 557 { 558 /* We are called from atomic context (tasklet && djrcv->lock held) */ 559 struct dj_device *dj_device; 560 561 dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index]; 562 563 if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) || 564 (hid_reportid_size_map[dj_report->report_type] == 0)) { 565 dbg_hid("invalid report type:%x\n", dj_report->report_type); 566 return; 567 } 568 569 if (hid_input_report(dj_device->hdev, 570 HID_INPUT_REPORT, &dj_report->report_type, 571 hid_reportid_size_map[dj_report->report_type], 1)) { 572 dbg_hid("hid_input_report error\n"); 573 } 574 } 575 576 static void logi_dj_recv_forward_hidpp(struct dj_device *dj_dev, u8 *data, 577 int size) 578 { 579 /* We are called from atomic context (tasklet && djrcv->lock held) */ 580 if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1)) 581 dbg_hid("hid_input_report error\n"); 582 } 583 584 static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev, 585 struct dj_report *dj_report) 586 { 587 struct hid_device *hdev = djrcv_dev->hdev; 588 struct hid_report *report; 589 struct hid_report_enum *output_report_enum; 590 u8 *data = (u8 *)(&dj_report->device_index); 591 unsigned int i; 592 593 output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT]; 594 report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT]; 595 596 if (!report) { 597 dev_err(&hdev->dev, "%s: unable to find dj report\n", __func__); 598 return -ENODEV; 599 } 600 601 for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++) 602 report->field[0]->value[i] = data[i]; 603 604 hid_hw_request(hdev, report, HID_REQ_SET_REPORT); 605 606 return 0; 607 } 608 609 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev) 610 { 611 struct dj_report *dj_report; 612 int retval; 613 614 /* no need to protect djrcv_dev->querying_devices */ 615 if (djrcv_dev->querying_devices) 616 return 0; 617 618 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); 619 if (!dj_report) 620 return -ENOMEM; 621 dj_report->report_id = REPORT_ID_DJ_SHORT; 622 dj_report->device_index = 0xFF; 623 dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES; 624 retval = logi_dj_recv_send_report(djrcv_dev, dj_report); 625 kfree(dj_report); 626 return retval; 627 } 628 629 630 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev, 631 unsigned timeout) 632 { 633 struct hid_device *hdev = djrcv_dev->hdev; 634 struct dj_report *dj_report; 635 u8 *buf; 636 int retval; 637 638 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); 639 if (!dj_report) 640 return -ENOMEM; 641 dj_report->report_id = REPORT_ID_DJ_SHORT; 642 dj_report->device_index = 0xFF; 643 dj_report->report_type = REPORT_TYPE_CMD_SWITCH; 644 dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F; 645 dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = (u8)timeout; 646 retval = logi_dj_recv_send_report(djrcv_dev, dj_report); 647 648 /* 649 * Ugly sleep to work around a USB 3.0 bug when the receiver is still 650 * processing the "switch-to-dj" command while we send an other command. 651 * 50 msec should gives enough time to the receiver to be ready. 652 */ 653 msleep(50); 654 655 /* 656 * Magical bits to set up hidpp notifications when the dj devices 657 * are connected/disconnected. 658 * 659 * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller 660 * than DJREPORT_SHORT_LENGTH. 661 */ 662 buf = (u8 *)dj_report; 663 664 memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH); 665 666 buf[0] = REPORT_ID_HIDPP_SHORT; 667 buf[1] = 0xFF; 668 buf[2] = 0x80; 669 buf[3] = 0x00; 670 buf[4] = 0x00; 671 buf[5] = 0x09; 672 buf[6] = 0x00; 673 674 hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf, 675 HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT, 676 HID_REQ_SET_REPORT); 677 678 kfree(dj_report); 679 return retval; 680 } 681 682 683 static int logi_dj_ll_open(struct hid_device *hid) 684 { 685 dbg_hid("%s:%s\n", __func__, hid->phys); 686 return 0; 687 688 } 689 690 static void logi_dj_ll_close(struct hid_device *hid) 691 { 692 dbg_hid("%s:%s\n", __func__, hid->phys); 693 } 694 695 /* 696 * Register 0xB5 is "pairing information". It is solely intended for the 697 * receiver, so do not overwrite the device index. 698 */ 699 static u8 unifying_pairing_query[] = {0x10, 0xff, 0x83, 0xb5}; 700 static u8 unifying_pairing_answer[] = {0x11, 0xff, 0x83, 0xb5}; 701 702 static int logi_dj_ll_raw_request(struct hid_device *hid, 703 unsigned char reportnum, __u8 *buf, 704 size_t count, unsigned char report_type, 705 int reqtype) 706 { 707 struct dj_device *djdev = hid->driver_data; 708 struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev; 709 u8 *out_buf; 710 int ret; 711 712 if ((buf[0] == REPORT_ID_HIDPP_SHORT) || 713 (buf[0] == REPORT_ID_HIDPP_LONG)) { 714 if (count < 2) 715 return -EINVAL; 716 717 /* special case where we should not overwrite 718 * the device_index */ 719 if (count == 7 && !memcmp(buf, unifying_pairing_query, 720 sizeof(unifying_pairing_query))) 721 buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1); 722 else 723 buf[1] = djdev->device_index; 724 return hid_hw_raw_request(djrcv_dev->hdev, reportnum, buf, 725 count, report_type, reqtype); 726 } 727 728 if (buf[0] != REPORT_TYPE_LEDS) 729 return -EINVAL; 730 731 out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC); 732 if (!out_buf) 733 return -ENOMEM; 734 735 if (count > DJREPORT_SHORT_LENGTH - 2) 736 count = DJREPORT_SHORT_LENGTH - 2; 737 738 out_buf[0] = REPORT_ID_DJ_SHORT; 739 out_buf[1] = djdev->device_index; 740 memcpy(out_buf + 2, buf, count); 741 742 ret = hid_hw_raw_request(djrcv_dev->hdev, out_buf[0], out_buf, 743 DJREPORT_SHORT_LENGTH, report_type, reqtype); 744 745 kfree(out_buf); 746 return ret; 747 } 748 749 static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size) 750 { 751 memcpy(rdesc + *rsize, data, size); 752 *rsize += size; 753 } 754 755 static int logi_dj_ll_parse(struct hid_device *hid) 756 { 757 struct dj_device *djdev = hid->driver_data; 758 unsigned int rsize = 0; 759 char *rdesc; 760 int retval; 761 762 dbg_hid("%s\n", __func__); 763 764 djdev->hdev->version = 0x0111; 765 djdev->hdev->country = 0x00; 766 767 rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL); 768 if (!rdesc) 769 return -ENOMEM; 770 771 if (djdev->reports_supported & STD_KEYBOARD) { 772 dbg_hid("%s: sending a kbd descriptor, reports_supported: %x\n", 773 __func__, djdev->reports_supported); 774 rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor)); 775 } 776 777 if (djdev->reports_supported & STD_MOUSE) { 778 dbg_hid("%s: sending a mouse descriptor, reports_supported: " 779 "%x\n", __func__, djdev->reports_supported); 780 rdcat(rdesc, &rsize, mse_descriptor, sizeof(mse_descriptor)); 781 } 782 783 if (djdev->reports_supported & MULTIMEDIA) { 784 dbg_hid("%s: sending a multimedia report descriptor: %x\n", 785 __func__, djdev->reports_supported); 786 rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor)); 787 } 788 789 if (djdev->reports_supported & POWER_KEYS) { 790 dbg_hid("%s: sending a power keys report descriptor: %x\n", 791 __func__, djdev->reports_supported); 792 rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor)); 793 } 794 795 if (djdev->reports_supported & MEDIA_CENTER) { 796 dbg_hid("%s: sending a media center report descriptor: %x\n", 797 __func__, djdev->reports_supported); 798 rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor)); 799 } 800 801 if (djdev->reports_supported & KBD_LEDS) { 802 dbg_hid("%s: need to send kbd leds report descriptor: %x\n", 803 __func__, djdev->reports_supported); 804 } 805 806 rdcat(rdesc, &rsize, hidpp_descriptor, sizeof(hidpp_descriptor)); 807 808 retval = hid_parse_report(hid, rdesc, rsize); 809 kfree(rdesc); 810 811 return retval; 812 } 813 814 static int logi_dj_ll_start(struct hid_device *hid) 815 { 816 dbg_hid("%s\n", __func__); 817 return 0; 818 } 819 820 static void logi_dj_ll_stop(struct hid_device *hid) 821 { 822 dbg_hid("%s\n", __func__); 823 } 824 825 826 static struct hid_ll_driver logi_dj_ll_driver = { 827 .parse = logi_dj_ll_parse, 828 .start = logi_dj_ll_start, 829 .stop = logi_dj_ll_stop, 830 .open = logi_dj_ll_open, 831 .close = logi_dj_ll_close, 832 .raw_request = logi_dj_ll_raw_request, 833 }; 834 835 static int logi_dj_dj_event(struct hid_device *hdev, 836 struct hid_report *report, u8 *data, 837 int size) 838 { 839 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 840 struct dj_report *dj_report = (struct dj_report *) data; 841 unsigned long flags; 842 843 /* 844 * Here we receive all data coming from iface 2, there are 3 cases: 845 * 846 * 1) Data is intended for this driver i. e. data contains arrival, 847 * departure, etc notifications, in which case we queue them for delayed 848 * processing by the work queue. We return 1 to hid-core as no further 849 * processing is required from it. 850 * 851 * 2) Data informs a connection change, if the change means rf link 852 * loss, then we must send a null report to the upper layer to discard 853 * potentially pressed keys that may be repeated forever by the input 854 * layer. Return 1 to hid-core as no further processing is required. 855 * 856 * 3) Data is an actual input event from a paired DJ device in which 857 * case we forward it to the correct hid device (via hid_input_report() 858 * ) and return 1 so hid-core does not anything else with it. 859 */ 860 861 if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) || 862 (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) { 863 /* 864 * Device index is wrong, bail out. 865 * This driver can ignore safely the receiver notifications, 866 * so ignore those reports too. 867 */ 868 if (dj_report->device_index != DJ_RECEIVER_INDEX) 869 dev_err(&hdev->dev, "%s: invalid device index:%d\n", 870 __func__, dj_report->device_index); 871 return false; 872 } 873 874 spin_lock_irqsave(&djrcv_dev->lock, flags); 875 876 if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) { 877 /* received an event for an unknown device, bail out */ 878 logi_dj_recv_queue_notification(djrcv_dev, dj_report); 879 goto out; 880 } 881 882 switch (dj_report->report_type) { 883 case REPORT_TYPE_NOTIF_DEVICE_PAIRED: 884 /* pairing notifications are handled above the switch */ 885 break; 886 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: 887 logi_dj_recv_queue_notification(djrcv_dev, dj_report); 888 break; 889 case REPORT_TYPE_NOTIF_CONNECTION_STATUS: 890 if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] == 891 STATUS_LINKLOSS) { 892 logi_dj_recv_forward_null_report(djrcv_dev, dj_report); 893 } 894 break; 895 default: 896 logi_dj_recv_forward_report(djrcv_dev, dj_report); 897 } 898 899 out: 900 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 901 902 return true; 903 } 904 905 static int logi_dj_hidpp_event(struct hid_device *hdev, 906 struct hid_report *report, u8 *data, 907 int size) 908 { 909 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 910 struct dj_report *dj_report = (struct dj_report *) data; 911 unsigned long flags; 912 u8 device_index = dj_report->device_index; 913 914 if (device_index == HIDPP_RECEIVER_INDEX) { 915 /* special case were the device wants to know its unifying 916 * name */ 917 if (size == HIDPP_REPORT_LONG_LENGTH && 918 !memcmp(data, unifying_pairing_answer, 919 sizeof(unifying_pairing_answer))) 920 device_index = (data[4] & 0x0F) + 1; 921 else 922 return false; 923 } 924 925 /* 926 * Data is from the HID++ collection, in this case, we forward the 927 * data to the corresponding child dj device and return 0 to hid-core 928 * so he data also goes to the hidraw device of the receiver. This 929 * allows a user space application to implement the full HID++ routing 930 * via the receiver. 931 */ 932 933 if ((device_index < DJ_DEVICE_INDEX_MIN) || 934 (device_index > DJ_DEVICE_INDEX_MAX)) { 935 /* 936 * Device index is wrong, bail out. 937 * This driver can ignore safely the receiver notifications, 938 * so ignore those reports too. 939 */ 940 dev_err(&hdev->dev, "%s: invalid device index:%d\n", 941 __func__, dj_report->device_index); 942 return false; 943 } 944 945 spin_lock_irqsave(&djrcv_dev->lock, flags); 946 947 if (!djrcv_dev->paired_dj_devices[device_index]) 948 /* received an event for an unknown device, bail out */ 949 goto out; 950 951 logi_dj_recv_forward_hidpp(djrcv_dev->paired_dj_devices[device_index], 952 data, size); 953 954 out: 955 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 956 957 return false; 958 } 959 960 static int logi_dj_raw_event(struct hid_device *hdev, 961 struct hid_report *report, u8 *data, 962 int size) 963 { 964 dbg_hid("%s, size:%d\n", __func__, size); 965 966 switch (data[0]) { 967 case REPORT_ID_DJ_SHORT: 968 if (size != DJREPORT_SHORT_LENGTH) { 969 dev_err(&hdev->dev, "DJ report of bad size (%d)", size); 970 return false; 971 } 972 return logi_dj_dj_event(hdev, report, data, size); 973 case REPORT_ID_HIDPP_SHORT: 974 if (size != HIDPP_REPORT_SHORT_LENGTH) { 975 dev_err(&hdev->dev, 976 "Short HID++ report of bad size (%d)", size); 977 return false; 978 } 979 return logi_dj_hidpp_event(hdev, report, data, size); 980 case REPORT_ID_HIDPP_LONG: 981 if (size != HIDPP_REPORT_LONG_LENGTH) { 982 dev_err(&hdev->dev, 983 "Long HID++ report of bad size (%d)", size); 984 return false; 985 } 986 return logi_dj_hidpp_event(hdev, report, data, size); 987 } 988 989 return false; 990 } 991 992 static int logi_dj_probe(struct hid_device *hdev, 993 const struct hid_device_id *id) 994 { 995 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 996 struct dj_receiver_dev *djrcv_dev; 997 int retval; 998 999 dbg_hid("%s called for ifnum %d\n", __func__, 1000 intf->cur_altsetting->desc.bInterfaceNumber); 1001 1002 /* Ignore interfaces 0 and 1, they will not carry any data, dont create 1003 * any hid_device for them */ 1004 if (intf->cur_altsetting->desc.bInterfaceNumber != 1005 LOGITECH_DJ_INTERFACE_NUMBER) { 1006 dbg_hid("%s: ignoring ifnum %d\n", __func__, 1007 intf->cur_altsetting->desc.bInterfaceNumber); 1008 return -ENODEV; 1009 } 1010 1011 /* Treat interface 2 */ 1012 1013 djrcv_dev = kzalloc(sizeof(struct dj_receiver_dev), GFP_KERNEL); 1014 if (!djrcv_dev) { 1015 dev_err(&hdev->dev, 1016 "%s:failed allocating dj_receiver_dev\n", __func__); 1017 return -ENOMEM; 1018 } 1019 djrcv_dev->hdev = hdev; 1020 INIT_WORK(&djrcv_dev->work, delayedwork_callback); 1021 spin_lock_init(&djrcv_dev->lock); 1022 if (kfifo_alloc(&djrcv_dev->notif_fifo, 1023 DJ_MAX_NUMBER_NOTIFICATIONS * sizeof(struct dj_report), 1024 GFP_KERNEL)) { 1025 dev_err(&hdev->dev, 1026 "%s:failed allocating notif_fifo\n", __func__); 1027 kfree(djrcv_dev); 1028 return -ENOMEM; 1029 } 1030 hid_set_drvdata(hdev, djrcv_dev); 1031 1032 /* Call to usbhid to fetch the HID descriptors of interface 2 and 1033 * subsequently call to the hid/hid-core to parse the fetched 1034 * descriptors, this will in turn create the hidraw and hiddev nodes 1035 * for interface 2 of the receiver */ 1036 retval = hid_parse(hdev); 1037 if (retval) { 1038 dev_err(&hdev->dev, 1039 "%s:parse of interface 2 failed\n", __func__); 1040 goto hid_parse_fail; 1041 } 1042 1043 if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, REPORT_ID_DJ_SHORT, 1044 0, DJREPORT_SHORT_LENGTH - 1)) { 1045 retval = -ENODEV; 1046 goto hid_parse_fail; 1047 } 1048 1049 /* Starts the usb device and connects to upper interfaces hiddev and 1050 * hidraw */ 1051 retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 1052 if (retval) { 1053 dev_err(&hdev->dev, 1054 "%s:hid_hw_start returned error\n", __func__); 1055 goto hid_hw_start_fail; 1056 } 1057 1058 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); 1059 if (retval < 0) { 1060 dev_err(&hdev->dev, 1061 "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n", 1062 __func__, retval); 1063 goto switch_to_dj_mode_fail; 1064 } 1065 1066 /* This is enabling the polling urb on the IN endpoint */ 1067 retval = hid_hw_open(hdev); 1068 if (retval < 0) { 1069 dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n", 1070 __func__, retval); 1071 goto llopen_failed; 1072 } 1073 1074 /* Allow incoming packets to arrive: */ 1075 hid_device_io_start(hdev); 1076 1077 retval = logi_dj_recv_query_paired_devices(djrcv_dev); 1078 if (retval < 0) { 1079 dev_err(&hdev->dev, "%s:logi_dj_recv_query_paired_devices " 1080 "error:%d\n", __func__, retval); 1081 goto logi_dj_recv_query_paired_devices_failed; 1082 } 1083 1084 return retval; 1085 1086 logi_dj_recv_query_paired_devices_failed: 1087 hid_hw_close(hdev); 1088 1089 llopen_failed: 1090 switch_to_dj_mode_fail: 1091 hid_hw_stop(hdev); 1092 1093 hid_hw_start_fail: 1094 hid_parse_fail: 1095 kfifo_free(&djrcv_dev->notif_fifo); 1096 kfree(djrcv_dev); 1097 hid_set_drvdata(hdev, NULL); 1098 return retval; 1099 1100 } 1101 1102 #ifdef CONFIG_PM 1103 static int logi_dj_reset_resume(struct hid_device *hdev) 1104 { 1105 int retval; 1106 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1107 1108 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); 1109 if (retval < 0) { 1110 dev_err(&hdev->dev, 1111 "%s:logi_dj_recv_switch_to_dj_mode returned error:%d\n", 1112 __func__, retval); 1113 } 1114 1115 return 0; 1116 } 1117 #endif 1118 1119 static void logi_dj_remove(struct hid_device *hdev) 1120 { 1121 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1122 struct dj_device *dj_dev; 1123 int i; 1124 1125 dbg_hid("%s\n", __func__); 1126 1127 cancel_work_sync(&djrcv_dev->work); 1128 1129 hid_hw_close(hdev); 1130 hid_hw_stop(hdev); 1131 1132 /* I suppose that at this point the only context that can access 1133 * the djrecv_data is this thread as the work item is guaranteed to 1134 * have finished and no more raw_event callbacks should arrive after 1135 * the remove callback was triggered so no locks are put around the 1136 * code below */ 1137 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { 1138 dj_dev = djrcv_dev->paired_dj_devices[i]; 1139 if (dj_dev != NULL) { 1140 hid_destroy_device(dj_dev->hdev); 1141 kfree(dj_dev); 1142 djrcv_dev->paired_dj_devices[i] = NULL; 1143 } 1144 } 1145 1146 kfifo_free(&djrcv_dev->notif_fifo); 1147 kfree(djrcv_dev); 1148 hid_set_drvdata(hdev, NULL); 1149 } 1150 1151 static const struct hid_device_id logi_dj_receivers[] = { 1152 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1153 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER)}, 1154 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1155 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2)}, 1156 {} 1157 }; 1158 1159 MODULE_DEVICE_TABLE(hid, logi_dj_receivers); 1160 1161 static struct hid_driver logi_djreceiver_driver = { 1162 .name = "logitech-djreceiver", 1163 .id_table = logi_dj_receivers, 1164 .probe = logi_dj_probe, 1165 .remove = logi_dj_remove, 1166 .raw_event = logi_dj_raw_event, 1167 #ifdef CONFIG_PM 1168 .reset_resume = logi_dj_reset_resume, 1169 #endif 1170 }; 1171 1172 module_hid_driver(logi_djreceiver_driver); 1173 1174 MODULE_LICENSE("GPL"); 1175 MODULE_AUTHOR("Logitech"); 1176 MODULE_AUTHOR("Nestor Lopez Casado"); 1177 MODULE_AUTHOR("nlopezcasad@logitech.com"); 1178