1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * HID driver for Logitech receivers 4 * 5 * Copyright (c) 2011 Logitech 6 */ 7 8 9 10 #include <linux/device.h> 11 #include <linux/hid.h> 12 #include <linux/module.h> 13 #include <linux/kfifo.h> 14 #include <linux/delay.h> 15 #include <linux/usb.h> /* For to_usb_interface for kvm extra intf check */ 16 #include <asm/unaligned.h> 17 #include "hid-ids.h" 18 19 #define DJ_MAX_PAIRED_DEVICES 7 20 #define DJ_MAX_NUMBER_NOTIFS 8 21 #define DJ_RECEIVER_INDEX 0 22 #define DJ_DEVICE_INDEX_MIN 1 23 #define DJ_DEVICE_INDEX_MAX 7 24 25 #define DJREPORT_SHORT_LENGTH 15 26 #define DJREPORT_LONG_LENGTH 32 27 28 #define REPORT_ID_DJ_SHORT 0x20 29 #define REPORT_ID_DJ_LONG 0x21 30 31 #define REPORT_ID_HIDPP_SHORT 0x10 32 #define REPORT_ID_HIDPP_LONG 0x11 33 #define REPORT_ID_HIDPP_VERY_LONG 0x12 34 35 #define HIDPP_REPORT_SHORT_LENGTH 7 36 #define HIDPP_REPORT_LONG_LENGTH 20 37 38 #define HIDPP_RECEIVER_INDEX 0xff 39 40 #define REPORT_TYPE_RFREPORT_FIRST 0x01 41 #define REPORT_TYPE_RFREPORT_LAST 0x1F 42 43 /* Command Switch to DJ mode */ 44 #define REPORT_TYPE_CMD_SWITCH 0x80 45 #define CMD_SWITCH_PARAM_DEVBITFIELD 0x00 46 #define CMD_SWITCH_PARAM_TIMEOUT_SECONDS 0x01 47 #define TIMEOUT_NO_KEEPALIVE 0x00 48 49 /* Command to Get the list of Paired devices */ 50 #define REPORT_TYPE_CMD_GET_PAIRED_DEVICES 0x81 51 52 /* Device Paired Notification */ 53 #define REPORT_TYPE_NOTIF_DEVICE_PAIRED 0x41 54 #define SPFUNCTION_MORE_NOTIF_EXPECTED 0x01 55 #define SPFUNCTION_DEVICE_LIST_EMPTY 0x02 56 #define DEVICE_PAIRED_PARAM_SPFUNCTION 0x00 57 #define DEVICE_PAIRED_PARAM_EQUAD_ID_LSB 0x01 58 #define DEVICE_PAIRED_PARAM_EQUAD_ID_MSB 0x02 59 #define DEVICE_PAIRED_RF_REPORT_TYPE 0x03 60 61 /* Device Un-Paired Notification */ 62 #define REPORT_TYPE_NOTIF_DEVICE_UNPAIRED 0x40 63 64 /* Connection Status Notification */ 65 #define REPORT_TYPE_NOTIF_CONNECTION_STATUS 0x42 66 #define CONNECTION_STATUS_PARAM_STATUS 0x00 67 #define STATUS_LINKLOSS 0x01 68 69 /* Error Notification */ 70 #define REPORT_TYPE_NOTIF_ERROR 0x7F 71 #define NOTIF_ERROR_PARAM_ETYPE 0x00 72 #define ETYPE_KEEPALIVE_TIMEOUT 0x01 73 74 /* supported DJ HID && RF report types */ 75 #define REPORT_TYPE_KEYBOARD 0x01 76 #define REPORT_TYPE_MOUSE 0x02 77 #define REPORT_TYPE_CONSUMER_CONTROL 0x03 78 #define REPORT_TYPE_SYSTEM_CONTROL 0x04 79 #define REPORT_TYPE_MEDIA_CENTER 0x08 80 #define REPORT_TYPE_LEDS 0x0E 81 82 /* RF Report types bitfield */ 83 #define STD_KEYBOARD BIT(1) 84 #define STD_MOUSE BIT(2) 85 #define MULTIMEDIA BIT(3) 86 #define POWER_KEYS BIT(4) 87 #define KBD_MOUSE BIT(5) 88 #define MEDIA_CENTER BIT(8) 89 #define KBD_LEDS BIT(14) 90 /* Fake (bitnr > NUMBER_OF_HID_REPORTS) bit to track HID++ capability */ 91 #define HIDPP BIT_ULL(63) 92 93 /* HID++ Device Connected Notification */ 94 #define REPORT_TYPE_NOTIF_DEVICE_CONNECTED 0x41 95 #define HIDPP_PARAM_PROTO_TYPE 0x00 96 #define HIDPP_PARAM_DEVICE_INFO 0x01 97 #define HIDPP_PARAM_EQUAD_LSB 0x02 98 #define HIDPP_PARAM_EQUAD_MSB 0x03 99 #define HIDPP_PARAM_27MHZ_DEVID 0x03 100 #define HIDPP_DEVICE_TYPE_MASK GENMASK(3, 0) 101 #define HIDPP_LINK_STATUS_MASK BIT(6) 102 #define HIDPP_MANUFACTURER_MASK BIT(7) 103 #define HIDPP_27MHZ_SECURE_MASK BIT(7) 104 105 #define HIDPP_DEVICE_TYPE_KEYBOARD 1 106 #define HIDPP_DEVICE_TYPE_MOUSE 2 107 108 #define HIDPP_SET_REGISTER 0x80 109 #define HIDPP_GET_LONG_REGISTER 0x83 110 #define HIDPP_REG_CONNECTION_STATE 0x02 111 #define HIDPP_REG_PAIRING_INFORMATION 0xB5 112 #define HIDPP_PAIRING_INFORMATION 0x20 113 #define HIDPP_FAKE_DEVICE_ARRIVAL 0x02 114 115 enum recvr_type { 116 recvr_type_dj, 117 recvr_type_hidpp, 118 recvr_type_gaming_hidpp, 119 recvr_type_mouse_only, 120 recvr_type_27mhz, 121 recvr_type_bluetooth, 122 recvr_type_dinovo, 123 }; 124 125 struct dj_report { 126 u8 report_id; 127 u8 device_index; 128 u8 report_type; 129 u8 report_params[DJREPORT_SHORT_LENGTH - 3]; 130 }; 131 132 struct hidpp_event { 133 u8 report_id; 134 u8 device_index; 135 u8 sub_id; 136 u8 params[HIDPP_REPORT_LONG_LENGTH - 3U]; 137 } __packed; 138 139 struct dj_receiver_dev { 140 struct hid_device *mouse; 141 struct hid_device *keyboard; 142 struct hid_device *hidpp; 143 struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES + 144 DJ_DEVICE_INDEX_MIN]; 145 struct list_head list; 146 struct kref kref; 147 struct work_struct work; 148 struct kfifo notif_fifo; 149 unsigned long last_query; /* in jiffies */ 150 bool ready; 151 enum recvr_type type; 152 unsigned int unnumbered_application; 153 spinlock_t lock; 154 }; 155 156 struct dj_device { 157 struct hid_device *hdev; 158 struct dj_receiver_dev *dj_receiver_dev; 159 u64 reports_supported; 160 u8 device_index; 161 }; 162 163 #define WORKITEM_TYPE_EMPTY 0 164 #define WORKITEM_TYPE_PAIRED 1 165 #define WORKITEM_TYPE_UNPAIRED 2 166 #define WORKITEM_TYPE_UNKNOWN 255 167 168 struct dj_workitem { 169 u8 type; /* WORKITEM_TYPE_* */ 170 u8 device_index; 171 u8 device_type; 172 u8 quad_id_msb; 173 u8 quad_id_lsb; 174 u64 reports_supported; 175 }; 176 177 /* Keyboard descriptor (1) */ 178 static const char kbd_descriptor[] = { 179 0x05, 0x01, /* USAGE_PAGE (generic Desktop) */ 180 0x09, 0x06, /* USAGE (Keyboard) */ 181 0xA1, 0x01, /* COLLECTION (Application) */ 182 0x85, 0x01, /* REPORT_ID (1) */ 183 0x95, 0x08, /* REPORT_COUNT (8) */ 184 0x75, 0x01, /* REPORT_SIZE (1) */ 185 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 186 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 187 0x05, 0x07, /* USAGE_PAGE (Keyboard) */ 188 0x19, 0xE0, /* USAGE_MINIMUM (Left Control) */ 189 0x29, 0xE7, /* USAGE_MAXIMUM (Right GUI) */ 190 0x81, 0x02, /* INPUT (Data,Var,Abs) */ 191 0x95, 0x06, /* REPORT_COUNT (6) */ 192 0x75, 0x08, /* REPORT_SIZE (8) */ 193 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 194 0x26, 0xFF, 0x00, /* LOGICAL_MAXIMUM (255) */ 195 0x05, 0x07, /* USAGE_PAGE (Keyboard) */ 196 0x19, 0x00, /* USAGE_MINIMUM (no event) */ 197 0x2A, 0xFF, 0x00, /* USAGE_MAXIMUM (reserved) */ 198 0x81, 0x00, /* INPUT (Data,Ary,Abs) */ 199 0x85, 0x0e, /* REPORT_ID (14) */ 200 0x05, 0x08, /* USAGE PAGE (LED page) */ 201 0x95, 0x05, /* REPORT COUNT (5) */ 202 0x75, 0x01, /* REPORT SIZE (1) */ 203 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 204 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 205 0x19, 0x01, /* USAGE MINIMUM (1) */ 206 0x29, 0x05, /* USAGE MAXIMUM (5) */ 207 0x91, 0x02, /* OUTPUT (Data, Variable, Absolute) */ 208 0x95, 0x01, /* REPORT COUNT (1) */ 209 0x75, 0x03, /* REPORT SIZE (3) */ 210 0x91, 0x01, /* OUTPUT (Constant) */ 211 0xC0 212 }; 213 214 /* Mouse descriptor (2) */ 215 static const char mse_descriptor[] = { 216 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 217 0x09, 0x02, /* USAGE (Mouse) */ 218 0xA1, 0x01, /* COLLECTION (Application) */ 219 0x85, 0x02, /* REPORT_ID = 2 */ 220 0x09, 0x01, /* USAGE (pointer) */ 221 0xA1, 0x00, /* COLLECTION (physical) */ 222 0x05, 0x09, /* USAGE_PAGE (buttons) */ 223 0x19, 0x01, /* USAGE_MIN (1) */ 224 0x29, 0x10, /* USAGE_MAX (16) */ 225 0x15, 0x00, /* LOGICAL_MIN (0) */ 226 0x25, 0x01, /* LOGICAL_MAX (1) */ 227 0x95, 0x10, /* REPORT_COUNT (16) */ 228 0x75, 0x01, /* REPORT_SIZE (1) */ 229 0x81, 0x02, /* INPUT (data var abs) */ 230 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 231 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ 232 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ 233 0x75, 0x0C, /* REPORT_SIZE (12) */ 234 0x95, 0x02, /* REPORT_COUNT (2) */ 235 0x09, 0x30, /* USAGE (X) */ 236 0x09, 0x31, /* USAGE (Y) */ 237 0x81, 0x06, /* INPUT */ 238 0x15, 0x81, /* LOGICAL_MIN (-127) */ 239 0x25, 0x7F, /* LOGICAL_MAX (127) */ 240 0x75, 0x08, /* REPORT_SIZE (8) */ 241 0x95, 0x01, /* REPORT_COUNT (1) */ 242 0x09, 0x38, /* USAGE (wheel) */ 243 0x81, 0x06, /* INPUT */ 244 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 245 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 246 0x95, 0x01, /* REPORT_COUNT (1) */ 247 0x81, 0x06, /* INPUT */ 248 0xC0, /* END_COLLECTION */ 249 0xC0, /* END_COLLECTION */ 250 }; 251 252 /* Mouse descriptor (2) for 27 MHz receiver, only 8 buttons */ 253 static const char mse_27mhz_descriptor[] = { 254 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 255 0x09, 0x02, /* USAGE (Mouse) */ 256 0xA1, 0x01, /* COLLECTION (Application) */ 257 0x85, 0x02, /* REPORT_ID = 2 */ 258 0x09, 0x01, /* USAGE (pointer) */ 259 0xA1, 0x00, /* COLLECTION (physical) */ 260 0x05, 0x09, /* USAGE_PAGE (buttons) */ 261 0x19, 0x01, /* USAGE_MIN (1) */ 262 0x29, 0x08, /* USAGE_MAX (8) */ 263 0x15, 0x00, /* LOGICAL_MIN (0) */ 264 0x25, 0x01, /* LOGICAL_MAX (1) */ 265 0x95, 0x08, /* REPORT_COUNT (8) */ 266 0x75, 0x01, /* REPORT_SIZE (1) */ 267 0x81, 0x02, /* INPUT (data var abs) */ 268 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 269 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ 270 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ 271 0x75, 0x0C, /* REPORT_SIZE (12) */ 272 0x95, 0x02, /* REPORT_COUNT (2) */ 273 0x09, 0x30, /* USAGE (X) */ 274 0x09, 0x31, /* USAGE (Y) */ 275 0x81, 0x06, /* INPUT */ 276 0x15, 0x81, /* LOGICAL_MIN (-127) */ 277 0x25, 0x7F, /* LOGICAL_MAX (127) */ 278 0x75, 0x08, /* REPORT_SIZE (8) */ 279 0x95, 0x01, /* REPORT_COUNT (1) */ 280 0x09, 0x38, /* USAGE (wheel) */ 281 0x81, 0x06, /* INPUT */ 282 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 283 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 284 0x95, 0x01, /* REPORT_COUNT (1) */ 285 0x81, 0x06, /* INPUT */ 286 0xC0, /* END_COLLECTION */ 287 0xC0, /* END_COLLECTION */ 288 }; 289 290 /* Mouse descriptor (2) for Bluetooth receiver, low-res hwheel, 12 buttons */ 291 static const char mse_bluetooth_descriptor[] = { 292 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 293 0x09, 0x02, /* USAGE (Mouse) */ 294 0xA1, 0x01, /* COLLECTION (Application) */ 295 0x85, 0x02, /* REPORT_ID = 2 */ 296 0x09, 0x01, /* USAGE (pointer) */ 297 0xA1, 0x00, /* COLLECTION (physical) */ 298 0x05, 0x09, /* USAGE_PAGE (buttons) */ 299 0x19, 0x01, /* USAGE_MIN (1) */ 300 0x29, 0x08, /* USAGE_MAX (8) */ 301 0x15, 0x00, /* LOGICAL_MIN (0) */ 302 0x25, 0x01, /* LOGICAL_MAX (1) */ 303 0x95, 0x08, /* REPORT_COUNT (8) */ 304 0x75, 0x01, /* REPORT_SIZE (1) */ 305 0x81, 0x02, /* INPUT (data var abs) */ 306 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 307 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ 308 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ 309 0x75, 0x0C, /* REPORT_SIZE (12) */ 310 0x95, 0x02, /* REPORT_COUNT (2) */ 311 0x09, 0x30, /* USAGE (X) */ 312 0x09, 0x31, /* USAGE (Y) */ 313 0x81, 0x06, /* INPUT */ 314 0x15, 0x81, /* LOGICAL_MIN (-127) */ 315 0x25, 0x7F, /* LOGICAL_MAX (127) */ 316 0x75, 0x08, /* REPORT_SIZE (8) */ 317 0x95, 0x01, /* REPORT_COUNT (1) */ 318 0x09, 0x38, /* USAGE (wheel) */ 319 0x81, 0x06, /* INPUT */ 320 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 321 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 322 0x15, 0xF9, /* LOGICAL_MIN (-7) */ 323 0x25, 0x07, /* LOGICAL_MAX (7) */ 324 0x75, 0x04, /* REPORT_SIZE (4) */ 325 0x95, 0x01, /* REPORT_COUNT (1) */ 326 0x81, 0x06, /* INPUT */ 327 0x05, 0x09, /* USAGE_PAGE (buttons) */ 328 0x19, 0x09, /* USAGE_MIN (9) */ 329 0x29, 0x0C, /* USAGE_MAX (12) */ 330 0x15, 0x00, /* LOGICAL_MIN (0) */ 331 0x25, 0x01, /* LOGICAL_MAX (1) */ 332 0x75, 0x01, /* REPORT_SIZE (1) */ 333 0x95, 0x04, /* REPORT_COUNT (4) */ 334 0x81, 0x02, /* INPUT (Data,Var,Abs) */ 335 0xC0, /* END_COLLECTION */ 336 0xC0, /* END_COLLECTION */ 337 }; 338 339 /* Mouse descriptor (5) for Bluetooth receiver, normal-res hwheel, 8 buttons */ 340 static const char mse5_bluetooth_descriptor[] = { 341 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 342 0x09, 0x02, /* Usage (Mouse) */ 343 0xa1, 0x01, /* Collection (Application) */ 344 0x85, 0x05, /* Report ID (5) */ 345 0x09, 0x01, /* Usage (Pointer) */ 346 0xa1, 0x00, /* Collection (Physical) */ 347 0x05, 0x09, /* Usage Page (Button) */ 348 0x19, 0x01, /* Usage Minimum (1) */ 349 0x29, 0x08, /* Usage Maximum (8) */ 350 0x15, 0x00, /* Logical Minimum (0) */ 351 0x25, 0x01, /* Logical Maximum (1) */ 352 0x95, 0x08, /* Report Count (8) */ 353 0x75, 0x01, /* Report Size (1) */ 354 0x81, 0x02, /* Input (Data,Var,Abs) */ 355 0x05, 0x01, /* Usage Page (Generic Desktop) */ 356 0x16, 0x01, 0xf8, /* Logical Minimum (-2047) */ 357 0x26, 0xff, 0x07, /* Logical Maximum (2047) */ 358 0x75, 0x0c, /* Report Size (12) */ 359 0x95, 0x02, /* Report Count (2) */ 360 0x09, 0x30, /* Usage (X) */ 361 0x09, 0x31, /* Usage (Y) */ 362 0x81, 0x06, /* Input (Data,Var,Rel) */ 363 0x15, 0x81, /* Logical Minimum (-127) */ 364 0x25, 0x7f, /* Logical Maximum (127) */ 365 0x75, 0x08, /* Report Size (8) */ 366 0x95, 0x01, /* Report Count (1) */ 367 0x09, 0x38, /* Usage (Wheel) */ 368 0x81, 0x06, /* Input (Data,Var,Rel) */ 369 0x05, 0x0c, /* Usage Page (Consumer Devices) */ 370 0x0a, 0x38, 0x02, /* Usage (AC Pan) */ 371 0x15, 0x81, /* Logical Minimum (-127) */ 372 0x25, 0x7f, /* Logical Maximum (127) */ 373 0x75, 0x08, /* Report Size (8) */ 374 0x95, 0x01, /* Report Count (1) */ 375 0x81, 0x06, /* Input (Data,Var,Rel) */ 376 0xc0, /* End Collection */ 377 0xc0, /* End Collection */ 378 }; 379 380 /* Gaming Mouse descriptor (2) */ 381 static const char mse_high_res_descriptor[] = { 382 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 383 0x09, 0x02, /* USAGE (Mouse) */ 384 0xA1, 0x01, /* COLLECTION (Application) */ 385 0x85, 0x02, /* REPORT_ID = 2 */ 386 0x09, 0x01, /* USAGE (pointer) */ 387 0xA1, 0x00, /* COLLECTION (physical) */ 388 0x05, 0x09, /* USAGE_PAGE (buttons) */ 389 0x19, 0x01, /* USAGE_MIN (1) */ 390 0x29, 0x10, /* USAGE_MAX (16) */ 391 0x15, 0x00, /* LOGICAL_MIN (0) */ 392 0x25, 0x01, /* LOGICAL_MAX (1) */ 393 0x95, 0x10, /* REPORT_COUNT (16) */ 394 0x75, 0x01, /* REPORT_SIZE (1) */ 395 0x81, 0x02, /* INPUT (data var abs) */ 396 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 397 0x16, 0x01, 0x80, /* LOGICAL_MIN (-32767) */ 398 0x26, 0xFF, 0x7F, /* LOGICAL_MAX (32767) */ 399 0x75, 0x10, /* REPORT_SIZE (16) */ 400 0x95, 0x02, /* REPORT_COUNT (2) */ 401 0x09, 0x30, /* USAGE (X) */ 402 0x09, 0x31, /* USAGE (Y) */ 403 0x81, 0x06, /* INPUT */ 404 0x15, 0x81, /* LOGICAL_MIN (-127) */ 405 0x25, 0x7F, /* LOGICAL_MAX (127) */ 406 0x75, 0x08, /* REPORT_SIZE (8) */ 407 0x95, 0x01, /* REPORT_COUNT (1) */ 408 0x09, 0x38, /* USAGE (wheel) */ 409 0x81, 0x06, /* INPUT */ 410 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 411 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 412 0x95, 0x01, /* REPORT_COUNT (1) */ 413 0x81, 0x06, /* INPUT */ 414 0xC0, /* END_COLLECTION */ 415 0xC0, /* END_COLLECTION */ 416 }; 417 418 /* Consumer Control descriptor (3) */ 419 static const char consumer_descriptor[] = { 420 0x05, 0x0C, /* USAGE_PAGE (Consumer Devices) */ 421 0x09, 0x01, /* USAGE (Consumer Control) */ 422 0xA1, 0x01, /* COLLECTION (Application) */ 423 0x85, 0x03, /* REPORT_ID = 3 */ 424 0x75, 0x10, /* REPORT_SIZE (16) */ 425 0x95, 0x02, /* REPORT_COUNT (2) */ 426 0x15, 0x01, /* LOGICAL_MIN (1) */ 427 0x26, 0xFF, 0x02, /* LOGICAL_MAX (767) */ 428 0x19, 0x01, /* USAGE_MIN (1) */ 429 0x2A, 0xFF, 0x02, /* USAGE_MAX (767) */ 430 0x81, 0x00, /* INPUT (Data Ary Abs) */ 431 0xC0, /* END_COLLECTION */ 432 }; /* */ 433 434 /* System control descriptor (4) */ 435 static const char syscontrol_descriptor[] = { 436 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 437 0x09, 0x80, /* USAGE (System Control) */ 438 0xA1, 0x01, /* COLLECTION (Application) */ 439 0x85, 0x04, /* REPORT_ID = 4 */ 440 0x75, 0x02, /* REPORT_SIZE (2) */ 441 0x95, 0x01, /* REPORT_COUNT (1) */ 442 0x15, 0x01, /* LOGICAL_MIN (1) */ 443 0x25, 0x03, /* LOGICAL_MAX (3) */ 444 0x09, 0x82, /* USAGE (System Sleep) */ 445 0x09, 0x81, /* USAGE (System Power Down) */ 446 0x09, 0x83, /* USAGE (System Wake Up) */ 447 0x81, 0x60, /* INPUT (Data Ary Abs NPrf Null) */ 448 0x75, 0x06, /* REPORT_SIZE (6) */ 449 0x81, 0x03, /* INPUT (Cnst Var Abs) */ 450 0xC0, /* END_COLLECTION */ 451 }; 452 453 /* Media descriptor (8) */ 454 static const char media_descriptor[] = { 455 0x06, 0xbc, 0xff, /* Usage Page 0xffbc */ 456 0x09, 0x88, /* Usage 0x0088 */ 457 0xa1, 0x01, /* BeginCollection */ 458 0x85, 0x08, /* Report ID 8 */ 459 0x19, 0x01, /* Usage Min 0x0001 */ 460 0x29, 0xff, /* Usage Max 0x00ff */ 461 0x15, 0x01, /* Logical Min 1 */ 462 0x26, 0xff, 0x00, /* Logical Max 255 */ 463 0x75, 0x08, /* Report Size 8 */ 464 0x95, 0x01, /* Report Count 1 */ 465 0x81, 0x00, /* Input */ 466 0xc0, /* EndCollection */ 467 }; /* */ 468 469 /* HIDPP descriptor */ 470 static const char hidpp_descriptor[] = { 471 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 472 0x09, 0x01, /* Usage (Vendor Usage 1) */ 473 0xa1, 0x01, /* Collection (Application) */ 474 0x85, 0x10, /* Report ID (16) */ 475 0x75, 0x08, /* Report Size (8) */ 476 0x95, 0x06, /* Report Count (6) */ 477 0x15, 0x00, /* Logical Minimum (0) */ 478 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 479 0x09, 0x01, /* Usage (Vendor Usage 1) */ 480 0x81, 0x00, /* Input (Data,Arr,Abs) */ 481 0x09, 0x01, /* Usage (Vendor Usage 1) */ 482 0x91, 0x00, /* Output (Data,Arr,Abs) */ 483 0xc0, /* End Collection */ 484 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 485 0x09, 0x02, /* Usage (Vendor Usage 2) */ 486 0xa1, 0x01, /* Collection (Application) */ 487 0x85, 0x11, /* Report ID (17) */ 488 0x75, 0x08, /* Report Size (8) */ 489 0x95, 0x13, /* Report Count (19) */ 490 0x15, 0x00, /* Logical Minimum (0) */ 491 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 492 0x09, 0x02, /* Usage (Vendor Usage 2) */ 493 0x81, 0x00, /* Input (Data,Arr,Abs) */ 494 0x09, 0x02, /* Usage (Vendor Usage 2) */ 495 0x91, 0x00, /* Output (Data,Arr,Abs) */ 496 0xc0, /* End Collection */ 497 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 498 0x09, 0x04, /* Usage (Vendor Usage 0x04) */ 499 0xa1, 0x01, /* Collection (Application) */ 500 0x85, 0x20, /* Report ID (32) */ 501 0x75, 0x08, /* Report Size (8) */ 502 0x95, 0x0e, /* Report Count (14) */ 503 0x15, 0x00, /* Logical Minimum (0) */ 504 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 505 0x09, 0x41, /* Usage (Vendor Usage 0x41) */ 506 0x81, 0x00, /* Input (Data,Arr,Abs) */ 507 0x09, 0x41, /* Usage (Vendor Usage 0x41) */ 508 0x91, 0x00, /* Output (Data,Arr,Abs) */ 509 0x85, 0x21, /* Report ID (33) */ 510 0x95, 0x1f, /* Report Count (31) */ 511 0x15, 0x00, /* Logical Minimum (0) */ 512 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 513 0x09, 0x42, /* Usage (Vendor Usage 0x42) */ 514 0x81, 0x00, /* Input (Data,Arr,Abs) */ 515 0x09, 0x42, /* Usage (Vendor Usage 0x42) */ 516 0x91, 0x00, /* Output (Data,Arr,Abs) */ 517 0xc0, /* End Collection */ 518 }; 519 520 /* Maximum size of all defined hid reports in bytes (including report id) */ 521 #define MAX_REPORT_SIZE 8 522 523 /* Make sure all descriptors are present here */ 524 #define MAX_RDESC_SIZE \ 525 (sizeof(kbd_descriptor) + \ 526 sizeof(mse_bluetooth_descriptor) + \ 527 sizeof(mse5_bluetooth_descriptor) + \ 528 sizeof(consumer_descriptor) + \ 529 sizeof(syscontrol_descriptor) + \ 530 sizeof(media_descriptor) + \ 531 sizeof(hidpp_descriptor)) 532 533 /* Number of possible hid report types that can be created by this driver. 534 * 535 * Right now, RF report types have the same report types (or report id's) 536 * than the hid report created from those RF reports. In the future 537 * this doesnt have to be true. 538 * 539 * For instance, RF report type 0x01 which has a size of 8 bytes, corresponds 540 * to hid report id 0x01, this is standard keyboard. Same thing applies to mice 541 * reports and consumer control, etc. If a new RF report is created, it doesn't 542 * has to have the same report id as its corresponding hid report, so an 543 * translation may have to take place for future report types. 544 */ 545 #define NUMBER_OF_HID_REPORTS 32 546 static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = { 547 [1] = 8, /* Standard keyboard */ 548 [2] = 8, /* Standard mouse */ 549 [3] = 5, /* Consumer control */ 550 [4] = 2, /* System control */ 551 [8] = 2, /* Media Center */ 552 }; 553 554 555 #define LOGITECH_DJ_INTERFACE_NUMBER 0x02 556 557 static const struct hid_ll_driver logi_dj_ll_driver; 558 559 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev); 560 static void delayedwork_callback(struct work_struct *work); 561 562 static LIST_HEAD(dj_hdev_list); 563 static DEFINE_MUTEX(dj_hdev_list_lock); 564 565 static bool recvr_type_is_bluetooth(enum recvr_type type) 566 { 567 return type == recvr_type_bluetooth || type == recvr_type_dinovo; 568 } 569 570 /* 571 * dj/HID++ receivers are really a single logical entity, but for BIOS/Windows 572 * compatibility they have multiple USB interfaces. On HID++ receivers we need 573 * to listen for input reports on both interfaces. The functions below are used 574 * to create a single struct dj_receiver_dev for all interfaces belonging to 575 * a single USB-device / receiver. 576 */ 577 static struct dj_receiver_dev *dj_find_receiver_dev(struct hid_device *hdev, 578 enum recvr_type type) 579 { 580 struct dj_receiver_dev *djrcv_dev; 581 char sep; 582 583 /* 584 * The bluetooth receiver contains a built-in hub and has separate 585 * USB-devices for the keyboard and mouse interfaces. 586 */ 587 sep = recvr_type_is_bluetooth(type) ? '.' : '/'; 588 589 /* Try to find an already-probed interface from the same device */ 590 list_for_each_entry(djrcv_dev, &dj_hdev_list, list) { 591 if (djrcv_dev->mouse && 592 hid_compare_device_paths(hdev, djrcv_dev->mouse, sep)) { 593 kref_get(&djrcv_dev->kref); 594 return djrcv_dev; 595 } 596 if (djrcv_dev->keyboard && 597 hid_compare_device_paths(hdev, djrcv_dev->keyboard, sep)) { 598 kref_get(&djrcv_dev->kref); 599 return djrcv_dev; 600 } 601 if (djrcv_dev->hidpp && 602 hid_compare_device_paths(hdev, djrcv_dev->hidpp, sep)) { 603 kref_get(&djrcv_dev->kref); 604 return djrcv_dev; 605 } 606 } 607 608 return NULL; 609 } 610 611 static void dj_release_receiver_dev(struct kref *kref) 612 { 613 struct dj_receiver_dev *djrcv_dev = container_of(kref, struct dj_receiver_dev, kref); 614 615 list_del(&djrcv_dev->list); 616 kfifo_free(&djrcv_dev->notif_fifo); 617 kfree(djrcv_dev); 618 } 619 620 static void dj_put_receiver_dev(struct hid_device *hdev) 621 { 622 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 623 624 mutex_lock(&dj_hdev_list_lock); 625 626 if (djrcv_dev->mouse == hdev) 627 djrcv_dev->mouse = NULL; 628 if (djrcv_dev->keyboard == hdev) 629 djrcv_dev->keyboard = NULL; 630 if (djrcv_dev->hidpp == hdev) 631 djrcv_dev->hidpp = NULL; 632 633 kref_put(&djrcv_dev->kref, dj_release_receiver_dev); 634 635 mutex_unlock(&dj_hdev_list_lock); 636 } 637 638 static struct dj_receiver_dev *dj_get_receiver_dev(struct hid_device *hdev, 639 enum recvr_type type, 640 unsigned int application, 641 bool is_hidpp) 642 { 643 struct dj_receiver_dev *djrcv_dev; 644 645 mutex_lock(&dj_hdev_list_lock); 646 647 djrcv_dev = dj_find_receiver_dev(hdev, type); 648 if (!djrcv_dev) { 649 djrcv_dev = kzalloc(sizeof(*djrcv_dev), GFP_KERNEL); 650 if (!djrcv_dev) 651 goto out; 652 653 INIT_WORK(&djrcv_dev->work, delayedwork_callback); 654 spin_lock_init(&djrcv_dev->lock); 655 if (kfifo_alloc(&djrcv_dev->notif_fifo, 656 DJ_MAX_NUMBER_NOTIFS * sizeof(struct dj_workitem), 657 GFP_KERNEL)) { 658 kfree(djrcv_dev); 659 djrcv_dev = NULL; 660 goto out; 661 } 662 kref_init(&djrcv_dev->kref); 663 list_add_tail(&djrcv_dev->list, &dj_hdev_list); 664 djrcv_dev->last_query = jiffies; 665 djrcv_dev->type = type; 666 } 667 668 if (application == HID_GD_KEYBOARD) 669 djrcv_dev->keyboard = hdev; 670 if (application == HID_GD_MOUSE) 671 djrcv_dev->mouse = hdev; 672 if (is_hidpp) 673 djrcv_dev->hidpp = hdev; 674 675 hid_set_drvdata(hdev, djrcv_dev); 676 out: 677 mutex_unlock(&dj_hdev_list_lock); 678 return djrcv_dev; 679 } 680 681 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev, 682 struct dj_workitem *workitem) 683 { 684 /* Called in delayed work context */ 685 struct dj_device *dj_dev; 686 unsigned long flags; 687 688 spin_lock_irqsave(&djrcv_dev->lock, flags); 689 dj_dev = djrcv_dev->paired_dj_devices[workitem->device_index]; 690 djrcv_dev->paired_dj_devices[workitem->device_index] = NULL; 691 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 692 693 if (dj_dev != NULL) { 694 hid_destroy_device(dj_dev->hdev); 695 kfree(dj_dev); 696 } else { 697 hid_err(djrcv_dev->hidpp, "%s: can't destroy a NULL device\n", 698 __func__); 699 } 700 } 701 702 static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev, 703 struct dj_workitem *workitem) 704 { 705 /* Called in delayed work context */ 706 struct hid_device *djrcv_hdev = djrcv_dev->hidpp; 707 struct hid_device *dj_hiddev; 708 struct dj_device *dj_dev; 709 u8 device_index = workitem->device_index; 710 unsigned long flags; 711 712 /* Device index goes from 1 to 6, we need 3 bytes to store the 713 * semicolon, the index, and a null terminator 714 */ 715 unsigned char tmpstr[3]; 716 717 /* We are the only one ever adding a device, no need to lock */ 718 if (djrcv_dev->paired_dj_devices[device_index]) { 719 /* The device is already known. No need to reallocate it. */ 720 dbg_hid("%s: device is already known\n", __func__); 721 return; 722 } 723 724 dj_hiddev = hid_allocate_device(); 725 if (IS_ERR(dj_hiddev)) { 726 hid_err(djrcv_hdev, "%s: hid_allocate_dev failed\n", __func__); 727 return; 728 } 729 730 dj_hiddev->ll_driver = &logi_dj_ll_driver; 731 732 dj_hiddev->dev.parent = &djrcv_hdev->dev; 733 dj_hiddev->bus = BUS_USB; 734 dj_hiddev->vendor = djrcv_hdev->vendor; 735 dj_hiddev->product = (workitem->quad_id_msb << 8) | 736 workitem->quad_id_lsb; 737 if (workitem->device_type) { 738 const char *type_str = "Device"; 739 740 switch (workitem->device_type) { 741 case 0x01: type_str = "Keyboard"; break; 742 case 0x02: type_str = "Mouse"; break; 743 case 0x03: type_str = "Numpad"; break; 744 case 0x04: type_str = "Presenter"; break; 745 case 0x07: type_str = "Remote Control"; break; 746 case 0x08: type_str = "Trackball"; break; 747 case 0x09: type_str = "Touchpad"; break; 748 } 749 snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), 750 "Logitech Wireless %s PID:%04x", 751 type_str, dj_hiddev->product); 752 } else { 753 snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), 754 "Logitech Wireless Device PID:%04x", 755 dj_hiddev->product); 756 } 757 758 if (djrcv_dev->type == recvr_type_27mhz) 759 dj_hiddev->group = HID_GROUP_LOGITECH_27MHZ_DEVICE; 760 else 761 dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE; 762 763 memcpy(dj_hiddev->phys, djrcv_hdev->phys, sizeof(djrcv_hdev->phys)); 764 snprintf(tmpstr, sizeof(tmpstr), ":%d", device_index); 765 strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys)); 766 767 dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL); 768 769 if (!dj_dev) { 770 hid_err(djrcv_hdev, "%s: failed allocating dj_dev\n", __func__); 771 goto dj_device_allocate_fail; 772 } 773 774 dj_dev->reports_supported = workitem->reports_supported; 775 dj_dev->hdev = dj_hiddev; 776 dj_dev->dj_receiver_dev = djrcv_dev; 777 dj_dev->device_index = device_index; 778 dj_hiddev->driver_data = dj_dev; 779 780 spin_lock_irqsave(&djrcv_dev->lock, flags); 781 djrcv_dev->paired_dj_devices[device_index] = dj_dev; 782 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 783 784 if (hid_add_device(dj_hiddev)) { 785 hid_err(djrcv_hdev, "%s: failed adding dj_device\n", __func__); 786 goto hid_add_device_fail; 787 } 788 789 return; 790 791 hid_add_device_fail: 792 spin_lock_irqsave(&djrcv_dev->lock, flags); 793 djrcv_dev->paired_dj_devices[device_index] = NULL; 794 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 795 kfree(dj_dev); 796 dj_device_allocate_fail: 797 hid_destroy_device(dj_hiddev); 798 } 799 800 static void delayedwork_callback(struct work_struct *work) 801 { 802 struct dj_receiver_dev *djrcv_dev = 803 container_of(work, struct dj_receiver_dev, work); 804 805 struct dj_workitem workitem; 806 unsigned long flags; 807 int count; 808 int retval; 809 810 dbg_hid("%s\n", __func__); 811 812 spin_lock_irqsave(&djrcv_dev->lock, flags); 813 814 /* 815 * Since we attach to multiple interfaces, we may get scheduled before 816 * we are bound to the HID++ interface, catch this. 817 */ 818 if (!djrcv_dev->ready) { 819 pr_warn("%s: delayedwork queued before hidpp interface was enumerated\n", 820 __func__); 821 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 822 return; 823 } 824 825 count = kfifo_out(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 826 827 if (count != sizeof(workitem)) { 828 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 829 return; 830 } 831 832 if (!kfifo_is_empty(&djrcv_dev->notif_fifo)) 833 schedule_work(&djrcv_dev->work); 834 835 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 836 837 switch (workitem.type) { 838 case WORKITEM_TYPE_PAIRED: 839 logi_dj_recv_add_djhid_device(djrcv_dev, &workitem); 840 break; 841 case WORKITEM_TYPE_UNPAIRED: 842 logi_dj_recv_destroy_djhid_device(djrcv_dev, &workitem); 843 break; 844 case WORKITEM_TYPE_UNKNOWN: 845 retval = logi_dj_recv_query_paired_devices(djrcv_dev); 846 if (retval) { 847 hid_err(djrcv_dev->hidpp, "%s: logi_dj_recv_query_paired_devices error: %d\n", 848 __func__, retval); 849 } 850 break; 851 case WORKITEM_TYPE_EMPTY: 852 dbg_hid("%s: device list is empty\n", __func__); 853 break; 854 } 855 } 856 857 /* 858 * Sometimes we receive reports for which we do not have a paired dj_device 859 * associated with the device_index or report-type to forward the report to. 860 * This means that the original "device paired" notification corresponding 861 * to the dj_device never arrived to this driver. Possible reasons for this are: 862 * 1) hid-core discards all packets coming from a device during probe(). 863 * 2) if the receiver is plugged into a KVM switch then the pairing reports 864 * are only forwarded to it if the focus is on this PC. 865 * This function deals with this by re-asking the receiver for the list of 866 * connected devices in the delayed work callback. 867 * This function MUST be called with djrcv->lock held. 868 */ 869 static void logi_dj_recv_queue_unknown_work(struct dj_receiver_dev *djrcv_dev) 870 { 871 struct dj_workitem workitem = { .type = WORKITEM_TYPE_UNKNOWN }; 872 873 /* Rate limit queries done because of unhandled reports to 2/sec */ 874 if (time_before(jiffies, djrcv_dev->last_query + HZ / 2)) 875 return; 876 877 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 878 schedule_work(&djrcv_dev->work); 879 } 880 881 static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev, 882 struct dj_report *dj_report) 883 { 884 /* We are called from atomic context (tasklet && djrcv->lock held) */ 885 struct dj_workitem workitem = { 886 .device_index = dj_report->device_index, 887 }; 888 889 switch (dj_report->report_type) { 890 case REPORT_TYPE_NOTIF_DEVICE_PAIRED: 891 workitem.type = WORKITEM_TYPE_PAIRED; 892 if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] & 893 SPFUNCTION_DEVICE_LIST_EMPTY) { 894 workitem.type = WORKITEM_TYPE_EMPTY; 895 break; 896 } 897 fallthrough; 898 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: 899 workitem.quad_id_msb = 900 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB]; 901 workitem.quad_id_lsb = 902 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB]; 903 workitem.reports_supported = get_unaligned_le32( 904 dj_report->report_params + 905 DEVICE_PAIRED_RF_REPORT_TYPE); 906 workitem.reports_supported |= HIDPP; 907 if (dj_report->report_type == REPORT_TYPE_NOTIF_DEVICE_UNPAIRED) 908 workitem.type = WORKITEM_TYPE_UNPAIRED; 909 break; 910 default: 911 logi_dj_recv_queue_unknown_work(djrcv_dev); 912 return; 913 } 914 915 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 916 schedule_work(&djrcv_dev->work); 917 } 918 919 /* 920 * Some quad/bluetooth keyboards have a builtin touchpad in this case we see 921 * only 1 paired device with a device_type of REPORT_TYPE_KEYBOARD. For the 922 * touchpad to work we must also forward mouse input reports to the dj_hiddev 923 * created for the keyboard (instead of forwarding them to a second paired 924 * device with a device_type of REPORT_TYPE_MOUSE as we normally would). 925 * 926 * On Dinovo receivers the keyboard's touchpad and an optional paired actual 927 * mouse send separate input reports, INPUT(2) aka STD_MOUSE for the mouse 928 * and INPUT(5) aka KBD_MOUSE for the keyboard's touchpad. 929 * 930 * On MX5x00 receivers (which can also be paired with a Dinovo keyboard) 931 * INPUT(2) is used for both an optional paired actual mouse and for the 932 * keyboard's touchpad. 933 */ 934 static const u16 kbd_builtin_touchpad_ids[] = { 935 0xb309, /* Dinovo Edge */ 936 0xb30c, /* Dinovo Mini */ 937 }; 938 939 static void logi_hidpp_dev_conn_notif_equad(struct hid_device *hdev, 940 struct hidpp_event *hidpp_report, 941 struct dj_workitem *workitem) 942 { 943 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 944 int i, id; 945 946 workitem->type = WORKITEM_TYPE_PAIRED; 947 workitem->device_type = hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & 948 HIDPP_DEVICE_TYPE_MASK; 949 workitem->quad_id_msb = hidpp_report->params[HIDPP_PARAM_EQUAD_MSB]; 950 workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_EQUAD_LSB]; 951 switch (workitem->device_type) { 952 case REPORT_TYPE_KEYBOARD: 953 workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA | 954 POWER_KEYS | MEDIA_CENTER | 955 HIDPP; 956 id = (workitem->quad_id_msb << 8) | workitem->quad_id_lsb; 957 for (i = 0; i < ARRAY_SIZE(kbd_builtin_touchpad_ids); i++) { 958 if (id == kbd_builtin_touchpad_ids[i]) { 959 if (djrcv_dev->type == recvr_type_dinovo) 960 workitem->reports_supported |= KBD_MOUSE; 961 else 962 workitem->reports_supported |= STD_MOUSE; 963 break; 964 } 965 } 966 break; 967 case REPORT_TYPE_MOUSE: 968 workitem->reports_supported |= STD_MOUSE | HIDPP | MULTIMEDIA; 969 break; 970 } 971 } 972 973 static void logi_hidpp_dev_conn_notif_27mhz(struct hid_device *hdev, 974 struct hidpp_event *hidpp_report, 975 struct dj_workitem *workitem) 976 { 977 workitem->type = WORKITEM_TYPE_PAIRED; 978 workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID]; 979 switch (hidpp_report->device_index) { 980 case 1: /* Index 1 is always a mouse */ 981 case 2: /* Index 2 is always a mouse */ 982 workitem->device_type = HIDPP_DEVICE_TYPE_MOUSE; 983 workitem->reports_supported |= STD_MOUSE | HIDPP; 984 break; 985 case 3: /* Index 3 is always the keyboard */ 986 if (hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & HIDPP_27MHZ_SECURE_MASK) { 987 hid_info(hdev, "Keyboard connection is encrypted\n"); 988 } else { 989 hid_warn(hdev, "Keyboard events are send over the air in plain-text / unencrypted\n"); 990 hid_warn(hdev, "See: https://gitlab.freedesktop.org/jwrdegoede/logitech-27mhz-keyboard-encryption-setup/\n"); 991 } 992 fallthrough; 993 case 4: /* Index 4 is used for an optional separate numpad */ 994 workitem->device_type = HIDPP_DEVICE_TYPE_KEYBOARD; 995 workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA | 996 POWER_KEYS | HIDPP; 997 break; 998 default: 999 hid_warn(hdev, "%s: unexpected device-index %d", __func__, 1000 hidpp_report->device_index); 1001 } 1002 } 1003 1004 static void logi_hidpp_recv_queue_notif(struct hid_device *hdev, 1005 struct hidpp_event *hidpp_report) 1006 { 1007 /* We are called from atomic context (tasklet && djrcv->lock held) */ 1008 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1009 const char *device_type = "UNKNOWN"; 1010 struct dj_workitem workitem = { 1011 .type = WORKITEM_TYPE_EMPTY, 1012 .device_index = hidpp_report->device_index, 1013 }; 1014 1015 switch (hidpp_report->params[HIDPP_PARAM_PROTO_TYPE]) { 1016 case 0x01: 1017 device_type = "Bluetooth"; 1018 /* Bluetooth connect packet contents is the same as (e)QUAD */ 1019 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1020 if (!(hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & 1021 HIDPP_MANUFACTURER_MASK)) { 1022 hid_info(hdev, "Non Logitech device connected on slot %d\n", 1023 hidpp_report->device_index); 1024 workitem.reports_supported &= ~HIDPP; 1025 } 1026 break; 1027 case 0x02: 1028 device_type = "27 Mhz"; 1029 logi_hidpp_dev_conn_notif_27mhz(hdev, hidpp_report, &workitem); 1030 break; 1031 case 0x03: 1032 device_type = "QUAD or eQUAD"; 1033 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1034 break; 1035 case 0x04: 1036 device_type = "eQUAD step 4 DJ"; 1037 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1038 break; 1039 case 0x05: 1040 device_type = "DFU Lite"; 1041 break; 1042 case 0x06: 1043 device_type = "eQUAD step 4 Lite"; 1044 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1045 break; 1046 case 0x07: 1047 device_type = "eQUAD step 4 Gaming"; 1048 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1049 workitem.reports_supported |= STD_KEYBOARD; 1050 break; 1051 case 0x08: 1052 device_type = "eQUAD step 4 for gamepads"; 1053 break; 1054 case 0x0a: 1055 device_type = "eQUAD nano Lite"; 1056 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1057 break; 1058 case 0x0c: 1059 device_type = "eQUAD Lightspeed 1"; 1060 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1061 workitem.reports_supported |= STD_KEYBOARD; 1062 break; 1063 case 0x0d: 1064 device_type = "eQUAD Lightspeed 1.1"; 1065 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1066 workitem.reports_supported |= STD_KEYBOARD; 1067 break; 1068 case 0x0f: 1069 case 0x11: 1070 device_type = "eQUAD Lightspeed 1.2"; 1071 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 1072 workitem.reports_supported |= STD_KEYBOARD; 1073 break; 1074 } 1075 1076 /* custom receiver device (eg. powerplay) */ 1077 if (hidpp_report->device_index == 7) { 1078 workitem.reports_supported |= HIDPP; 1079 } 1080 1081 if (workitem.type == WORKITEM_TYPE_EMPTY) { 1082 hid_warn(hdev, 1083 "unusable device of type %s (0x%02x) connected on slot %d", 1084 device_type, 1085 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE], 1086 hidpp_report->device_index); 1087 return; 1088 } 1089 1090 hid_info(hdev, "device of type %s (0x%02x) connected on slot %d", 1091 device_type, hidpp_report->params[HIDPP_PARAM_PROTO_TYPE], 1092 hidpp_report->device_index); 1093 1094 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 1095 schedule_work(&djrcv_dev->work); 1096 } 1097 1098 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev, 1099 struct dj_report *dj_report) 1100 { 1101 /* We are called from atomic context (tasklet && djrcv->lock held) */ 1102 unsigned int i; 1103 u8 reportbuffer[MAX_REPORT_SIZE]; 1104 struct dj_device *djdev; 1105 1106 djdev = djrcv_dev->paired_dj_devices[dj_report->device_index]; 1107 1108 memset(reportbuffer, 0, sizeof(reportbuffer)); 1109 1110 for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) { 1111 if (djdev->reports_supported & (1 << i)) { 1112 reportbuffer[0] = i; 1113 if (hid_input_report(djdev->hdev, 1114 HID_INPUT_REPORT, 1115 reportbuffer, 1116 hid_reportid_size_map[i], 1)) { 1117 dbg_hid("hid_input_report error sending null " 1118 "report\n"); 1119 } 1120 } 1121 } 1122 } 1123 1124 static void logi_dj_recv_forward_dj(struct dj_receiver_dev *djrcv_dev, 1125 struct dj_report *dj_report) 1126 { 1127 /* We are called from atomic context (tasklet && djrcv->lock held) */ 1128 struct dj_device *dj_device; 1129 1130 dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index]; 1131 1132 if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) || 1133 (hid_reportid_size_map[dj_report->report_type] == 0)) { 1134 dbg_hid("invalid report type:%x\n", dj_report->report_type); 1135 return; 1136 } 1137 1138 if (hid_input_report(dj_device->hdev, 1139 HID_INPUT_REPORT, &dj_report->report_type, 1140 hid_reportid_size_map[dj_report->report_type], 1)) { 1141 dbg_hid("hid_input_report error\n"); 1142 } 1143 } 1144 1145 static void logi_dj_recv_forward_report(struct dj_device *dj_dev, u8 *data, 1146 int size) 1147 { 1148 /* We are called from atomic context (tasklet && djrcv->lock held) */ 1149 if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1)) 1150 dbg_hid("hid_input_report error\n"); 1151 } 1152 1153 static void logi_dj_recv_forward_input_report(struct hid_device *hdev, 1154 u8 *data, int size) 1155 { 1156 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1157 struct dj_device *dj_dev; 1158 unsigned long flags; 1159 u8 report = data[0]; 1160 int i; 1161 1162 if (report > REPORT_TYPE_RFREPORT_LAST) { 1163 hid_err(hdev, "Unexpected input report number %d\n", report); 1164 return; 1165 } 1166 1167 spin_lock_irqsave(&djrcv_dev->lock, flags); 1168 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { 1169 dj_dev = djrcv_dev->paired_dj_devices[i]; 1170 if (dj_dev && (dj_dev->reports_supported & BIT(report))) { 1171 logi_dj_recv_forward_report(dj_dev, data, size); 1172 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1173 return; 1174 } 1175 } 1176 1177 logi_dj_recv_queue_unknown_work(djrcv_dev); 1178 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1179 1180 dbg_hid("No dj-devs handling input report number %d\n", report); 1181 } 1182 1183 static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev, 1184 struct dj_report *dj_report) 1185 { 1186 struct hid_device *hdev = djrcv_dev->hidpp; 1187 struct hid_report *report; 1188 struct hid_report_enum *output_report_enum; 1189 u8 *data = (u8 *)(&dj_report->device_index); 1190 unsigned int i; 1191 1192 output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT]; 1193 report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT]; 1194 1195 if (!report) { 1196 hid_err(hdev, "%s: unable to find dj report\n", __func__); 1197 return -ENODEV; 1198 } 1199 1200 for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++) 1201 report->field[0]->value[i] = data[i]; 1202 1203 hid_hw_request(hdev, report, HID_REQ_SET_REPORT); 1204 1205 return 0; 1206 } 1207 1208 static int logi_dj_recv_query_hidpp_devices(struct dj_receiver_dev *djrcv_dev) 1209 { 1210 static const u8 template[] = { 1211 REPORT_ID_HIDPP_SHORT, 1212 HIDPP_RECEIVER_INDEX, 1213 HIDPP_SET_REGISTER, 1214 HIDPP_REG_CONNECTION_STATE, 1215 HIDPP_FAKE_DEVICE_ARRIVAL, 1216 0x00, 0x00 1217 }; 1218 u8 *hidpp_report; 1219 int retval; 1220 1221 hidpp_report = kmemdup(template, sizeof(template), GFP_KERNEL); 1222 if (!hidpp_report) 1223 return -ENOMEM; 1224 1225 retval = hid_hw_raw_request(djrcv_dev->hidpp, 1226 REPORT_ID_HIDPP_SHORT, 1227 hidpp_report, sizeof(template), 1228 HID_OUTPUT_REPORT, 1229 HID_REQ_SET_REPORT); 1230 1231 kfree(hidpp_report); 1232 return (retval < 0) ? retval : 0; 1233 } 1234 1235 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev) 1236 { 1237 struct dj_report *dj_report; 1238 int retval; 1239 1240 djrcv_dev->last_query = jiffies; 1241 1242 if (djrcv_dev->type != recvr_type_dj) 1243 return logi_dj_recv_query_hidpp_devices(djrcv_dev); 1244 1245 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); 1246 if (!dj_report) 1247 return -ENOMEM; 1248 dj_report->report_id = REPORT_ID_DJ_SHORT; 1249 dj_report->device_index = HIDPP_RECEIVER_INDEX; 1250 dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES; 1251 retval = logi_dj_recv_send_report(djrcv_dev, dj_report); 1252 kfree(dj_report); 1253 return retval; 1254 } 1255 1256 1257 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev, 1258 unsigned timeout) 1259 { 1260 struct hid_device *hdev = djrcv_dev->hidpp; 1261 struct dj_report *dj_report; 1262 u8 *buf; 1263 int retval = 0; 1264 1265 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); 1266 if (!dj_report) 1267 return -ENOMEM; 1268 1269 if (djrcv_dev->type == recvr_type_dj) { 1270 dj_report->report_id = REPORT_ID_DJ_SHORT; 1271 dj_report->device_index = HIDPP_RECEIVER_INDEX; 1272 dj_report->report_type = REPORT_TYPE_CMD_SWITCH; 1273 dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F; 1274 dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = 1275 (u8)timeout; 1276 1277 retval = logi_dj_recv_send_report(djrcv_dev, dj_report); 1278 1279 /* 1280 * Ugly sleep to work around a USB 3.0 bug when the receiver is 1281 * still processing the "switch-to-dj" command while we send an 1282 * other command. 1283 * 50 msec should gives enough time to the receiver to be ready. 1284 */ 1285 msleep(50); 1286 1287 if (retval) 1288 return retval; 1289 } 1290 1291 /* 1292 * Magical bits to set up hidpp notifications when the dj devices 1293 * are connected/disconnected. 1294 * 1295 * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller 1296 * than DJREPORT_SHORT_LENGTH. 1297 */ 1298 buf = (u8 *)dj_report; 1299 1300 memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH); 1301 1302 buf[0] = REPORT_ID_HIDPP_SHORT; 1303 buf[1] = HIDPP_RECEIVER_INDEX; 1304 buf[2] = 0x80; 1305 buf[3] = 0x00; 1306 buf[4] = 0x00; 1307 buf[5] = 0x09; 1308 buf[6] = 0x00; 1309 1310 retval = hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf, 1311 HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT, 1312 HID_REQ_SET_REPORT); 1313 1314 kfree(dj_report); 1315 return retval; 1316 } 1317 1318 1319 static int logi_dj_ll_open(struct hid_device *hid) 1320 { 1321 dbg_hid("%s: %s\n", __func__, hid->phys); 1322 return 0; 1323 1324 } 1325 1326 static void logi_dj_ll_close(struct hid_device *hid) 1327 { 1328 dbg_hid("%s: %s\n", __func__, hid->phys); 1329 } 1330 1331 /* 1332 * Register 0xB5 is "pairing information". It is solely intended for the 1333 * receiver, so do not overwrite the device index. 1334 */ 1335 static u8 unifying_pairing_query[] = { REPORT_ID_HIDPP_SHORT, 1336 HIDPP_RECEIVER_INDEX, 1337 HIDPP_GET_LONG_REGISTER, 1338 HIDPP_REG_PAIRING_INFORMATION }; 1339 static u8 unifying_pairing_answer[] = { REPORT_ID_HIDPP_LONG, 1340 HIDPP_RECEIVER_INDEX, 1341 HIDPP_GET_LONG_REGISTER, 1342 HIDPP_REG_PAIRING_INFORMATION }; 1343 1344 static int logi_dj_ll_raw_request(struct hid_device *hid, 1345 unsigned char reportnum, __u8 *buf, 1346 size_t count, unsigned char report_type, 1347 int reqtype) 1348 { 1349 struct dj_device *djdev = hid->driver_data; 1350 struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev; 1351 u8 *out_buf; 1352 int ret; 1353 1354 if ((buf[0] == REPORT_ID_HIDPP_SHORT) || 1355 (buf[0] == REPORT_ID_HIDPP_LONG) || 1356 (buf[0] == REPORT_ID_HIDPP_VERY_LONG)) { 1357 if (count < 2) 1358 return -EINVAL; 1359 1360 /* special case where we should not overwrite 1361 * the device_index */ 1362 if (count == 7 && !memcmp(buf, unifying_pairing_query, 1363 sizeof(unifying_pairing_query))) 1364 buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1); 1365 else 1366 buf[1] = djdev->device_index; 1367 return hid_hw_raw_request(djrcv_dev->hidpp, reportnum, buf, 1368 count, report_type, reqtype); 1369 } 1370 1371 if (buf[0] != REPORT_TYPE_LEDS) 1372 return -EINVAL; 1373 1374 if (djrcv_dev->type != recvr_type_dj && count >= 2) { 1375 if (!djrcv_dev->keyboard) { 1376 hid_warn(hid, "Received REPORT_TYPE_LEDS request before the keyboard interface was enumerated\n"); 1377 return 0; 1378 } 1379 /* usbhid overrides the report ID and ignores the first byte */ 1380 return hid_hw_raw_request(djrcv_dev->keyboard, 0, buf, count, 1381 report_type, reqtype); 1382 } 1383 1384 out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC); 1385 if (!out_buf) 1386 return -ENOMEM; 1387 1388 if (count > DJREPORT_SHORT_LENGTH - 2) 1389 count = DJREPORT_SHORT_LENGTH - 2; 1390 1391 out_buf[0] = REPORT_ID_DJ_SHORT; 1392 out_buf[1] = djdev->device_index; 1393 memcpy(out_buf + 2, buf, count); 1394 1395 ret = hid_hw_raw_request(djrcv_dev->hidpp, out_buf[0], out_buf, 1396 DJREPORT_SHORT_LENGTH, report_type, reqtype); 1397 1398 kfree(out_buf); 1399 return ret; 1400 } 1401 1402 static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size) 1403 { 1404 memcpy(rdesc + *rsize, data, size); 1405 *rsize += size; 1406 } 1407 1408 static int logi_dj_ll_parse(struct hid_device *hid) 1409 { 1410 struct dj_device *djdev = hid->driver_data; 1411 unsigned int rsize = 0; 1412 char *rdesc; 1413 int retval; 1414 1415 dbg_hid("%s\n", __func__); 1416 1417 djdev->hdev->version = 0x0111; 1418 djdev->hdev->country = 0x00; 1419 1420 rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL); 1421 if (!rdesc) 1422 return -ENOMEM; 1423 1424 if (djdev->reports_supported & STD_KEYBOARD) { 1425 dbg_hid("%s: sending a kbd descriptor, reports_supported: %llx\n", 1426 __func__, djdev->reports_supported); 1427 rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor)); 1428 } 1429 1430 if (djdev->reports_supported & STD_MOUSE) { 1431 dbg_hid("%s: sending a mouse descriptor, reports_supported: %llx\n", 1432 __func__, djdev->reports_supported); 1433 if (djdev->dj_receiver_dev->type == recvr_type_gaming_hidpp || 1434 djdev->dj_receiver_dev->type == recvr_type_mouse_only) 1435 rdcat(rdesc, &rsize, mse_high_res_descriptor, 1436 sizeof(mse_high_res_descriptor)); 1437 else if (djdev->dj_receiver_dev->type == recvr_type_27mhz) 1438 rdcat(rdesc, &rsize, mse_27mhz_descriptor, 1439 sizeof(mse_27mhz_descriptor)); 1440 else if (recvr_type_is_bluetooth(djdev->dj_receiver_dev->type)) 1441 rdcat(rdesc, &rsize, mse_bluetooth_descriptor, 1442 sizeof(mse_bluetooth_descriptor)); 1443 else 1444 rdcat(rdesc, &rsize, mse_descriptor, 1445 sizeof(mse_descriptor)); 1446 } 1447 1448 if (djdev->reports_supported & KBD_MOUSE) { 1449 dbg_hid("%s: sending a kbd-mouse descriptor, reports_supported: %llx\n", 1450 __func__, djdev->reports_supported); 1451 rdcat(rdesc, &rsize, mse5_bluetooth_descriptor, 1452 sizeof(mse5_bluetooth_descriptor)); 1453 } 1454 1455 if (djdev->reports_supported & MULTIMEDIA) { 1456 dbg_hid("%s: sending a multimedia report descriptor: %llx\n", 1457 __func__, djdev->reports_supported); 1458 rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor)); 1459 } 1460 1461 if (djdev->reports_supported & POWER_KEYS) { 1462 dbg_hid("%s: sending a power keys report descriptor: %llx\n", 1463 __func__, djdev->reports_supported); 1464 rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor)); 1465 } 1466 1467 if (djdev->reports_supported & MEDIA_CENTER) { 1468 dbg_hid("%s: sending a media center report descriptor: %llx\n", 1469 __func__, djdev->reports_supported); 1470 rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor)); 1471 } 1472 1473 if (djdev->reports_supported & KBD_LEDS) { 1474 dbg_hid("%s: need to send kbd leds report descriptor: %llx\n", 1475 __func__, djdev->reports_supported); 1476 } 1477 1478 if (djdev->reports_supported & HIDPP) { 1479 dbg_hid("%s: sending a HID++ descriptor, reports_supported: %llx\n", 1480 __func__, djdev->reports_supported); 1481 rdcat(rdesc, &rsize, hidpp_descriptor, 1482 sizeof(hidpp_descriptor)); 1483 } 1484 1485 retval = hid_parse_report(hid, rdesc, rsize); 1486 kfree(rdesc); 1487 1488 return retval; 1489 } 1490 1491 static int logi_dj_ll_start(struct hid_device *hid) 1492 { 1493 dbg_hid("%s\n", __func__); 1494 return 0; 1495 } 1496 1497 static void logi_dj_ll_stop(struct hid_device *hid) 1498 { 1499 dbg_hid("%s\n", __func__); 1500 } 1501 1502 static bool logi_dj_ll_may_wakeup(struct hid_device *hid) 1503 { 1504 struct dj_device *djdev = hid->driver_data; 1505 struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev; 1506 1507 return hid_hw_may_wakeup(djrcv_dev->hidpp); 1508 } 1509 1510 static const struct hid_ll_driver logi_dj_ll_driver = { 1511 .parse = logi_dj_ll_parse, 1512 .start = logi_dj_ll_start, 1513 .stop = logi_dj_ll_stop, 1514 .open = logi_dj_ll_open, 1515 .close = logi_dj_ll_close, 1516 .raw_request = logi_dj_ll_raw_request, 1517 .may_wakeup = logi_dj_ll_may_wakeup, 1518 }; 1519 1520 static int logi_dj_dj_event(struct hid_device *hdev, 1521 struct hid_report *report, u8 *data, 1522 int size) 1523 { 1524 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1525 struct dj_report *dj_report = (struct dj_report *) data; 1526 unsigned long flags; 1527 1528 /* 1529 * Here we receive all data coming from iface 2, there are 3 cases: 1530 * 1531 * 1) Data is intended for this driver i. e. data contains arrival, 1532 * departure, etc notifications, in which case we queue them for delayed 1533 * processing by the work queue. We return 1 to hid-core as no further 1534 * processing is required from it. 1535 * 1536 * 2) Data informs a connection change, if the change means rf link 1537 * loss, then we must send a null report to the upper layer to discard 1538 * potentially pressed keys that may be repeated forever by the input 1539 * layer. Return 1 to hid-core as no further processing is required. 1540 * 1541 * 3) Data is an actual input event from a paired DJ device in which 1542 * case we forward it to the correct hid device (via hid_input_report() 1543 * ) and return 1 so hid-core does not anything else with it. 1544 */ 1545 1546 if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) || 1547 (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) { 1548 /* 1549 * Device index is wrong, bail out. 1550 * This driver can ignore safely the receiver notifications, 1551 * so ignore those reports too. 1552 */ 1553 if (dj_report->device_index != DJ_RECEIVER_INDEX) 1554 hid_err(hdev, "%s: invalid device index:%d\n", 1555 __func__, dj_report->device_index); 1556 return false; 1557 } 1558 1559 spin_lock_irqsave(&djrcv_dev->lock, flags); 1560 1561 if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) { 1562 /* received an event for an unknown device, bail out */ 1563 logi_dj_recv_queue_notification(djrcv_dev, dj_report); 1564 goto out; 1565 } 1566 1567 switch (dj_report->report_type) { 1568 case REPORT_TYPE_NOTIF_DEVICE_PAIRED: 1569 /* pairing notifications are handled above the switch */ 1570 break; 1571 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: 1572 logi_dj_recv_queue_notification(djrcv_dev, dj_report); 1573 break; 1574 case REPORT_TYPE_NOTIF_CONNECTION_STATUS: 1575 if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] == 1576 STATUS_LINKLOSS) { 1577 logi_dj_recv_forward_null_report(djrcv_dev, dj_report); 1578 } 1579 break; 1580 default: 1581 logi_dj_recv_forward_dj(djrcv_dev, dj_report); 1582 } 1583 1584 out: 1585 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1586 1587 return true; 1588 } 1589 1590 static int logi_dj_hidpp_event(struct hid_device *hdev, 1591 struct hid_report *report, u8 *data, 1592 int size) 1593 { 1594 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1595 struct hidpp_event *hidpp_report = (struct hidpp_event *) data; 1596 struct dj_device *dj_dev; 1597 unsigned long flags; 1598 u8 device_index = hidpp_report->device_index; 1599 1600 if (device_index == HIDPP_RECEIVER_INDEX) { 1601 /* special case were the device wants to know its unifying 1602 * name */ 1603 if (size == HIDPP_REPORT_LONG_LENGTH && 1604 !memcmp(data, unifying_pairing_answer, 1605 sizeof(unifying_pairing_answer))) 1606 device_index = (data[4] & 0x0F) + 1; 1607 else 1608 return false; 1609 } 1610 1611 /* 1612 * Data is from the HID++ collection, in this case, we forward the 1613 * data to the corresponding child dj device and return 0 to hid-core 1614 * so he data also goes to the hidraw device of the receiver. This 1615 * allows a user space application to implement the full HID++ routing 1616 * via the receiver. 1617 */ 1618 1619 if ((device_index < DJ_DEVICE_INDEX_MIN) || 1620 (device_index > DJ_DEVICE_INDEX_MAX)) { 1621 /* 1622 * Device index is wrong, bail out. 1623 * This driver can ignore safely the receiver notifications, 1624 * so ignore those reports too. 1625 */ 1626 hid_err(hdev, "%s: invalid device index:%d\n", __func__, 1627 hidpp_report->device_index); 1628 return false; 1629 } 1630 1631 spin_lock_irqsave(&djrcv_dev->lock, flags); 1632 1633 dj_dev = djrcv_dev->paired_dj_devices[device_index]; 1634 1635 /* 1636 * With 27 MHz receivers, we do not get an explicit unpair event, 1637 * remove the old device if the user has paired a *different* device. 1638 */ 1639 if (djrcv_dev->type == recvr_type_27mhz && dj_dev && 1640 hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED && 1641 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE] == 0x02 && 1642 hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID] != 1643 dj_dev->hdev->product) { 1644 struct dj_workitem workitem = { 1645 .device_index = hidpp_report->device_index, 1646 .type = WORKITEM_TYPE_UNPAIRED, 1647 }; 1648 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 1649 /* logi_hidpp_recv_queue_notif will queue the work */ 1650 dj_dev = NULL; 1651 } 1652 1653 if (dj_dev) { 1654 logi_dj_recv_forward_report(dj_dev, data, size); 1655 } else { 1656 if (hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED) 1657 logi_hidpp_recv_queue_notif(hdev, hidpp_report); 1658 else 1659 logi_dj_recv_queue_unknown_work(djrcv_dev); 1660 } 1661 1662 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1663 1664 return false; 1665 } 1666 1667 static int logi_dj_raw_event(struct hid_device *hdev, 1668 struct hid_report *report, u8 *data, 1669 int size) 1670 { 1671 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1672 dbg_hid("%s, size:%d\n", __func__, size); 1673 1674 if (!djrcv_dev) 1675 return 0; 1676 1677 if (!hdev->report_enum[HID_INPUT_REPORT].numbered) { 1678 1679 if (djrcv_dev->unnumbered_application == HID_GD_KEYBOARD) { 1680 /* 1681 * For the keyboard, we can reuse the same report by 1682 * using the second byte which is constant in the USB 1683 * HID report descriptor. 1684 */ 1685 data[1] = data[0]; 1686 data[0] = REPORT_TYPE_KEYBOARD; 1687 1688 logi_dj_recv_forward_input_report(hdev, data, size); 1689 1690 /* restore previous state */ 1691 data[0] = data[1]; 1692 data[1] = 0; 1693 } 1694 /* 1695 * Mouse-only receivers send unnumbered mouse data. The 27 MHz 1696 * receiver uses 6 byte packets, the nano receiver 8 bytes. 1697 */ 1698 if (djrcv_dev->unnumbered_application == HID_GD_MOUSE && 1699 size <= 8) { 1700 u8 mouse_report[9]; 1701 1702 /* Prepend report id */ 1703 mouse_report[0] = REPORT_TYPE_MOUSE; 1704 memcpy(mouse_report + 1, data, size); 1705 logi_dj_recv_forward_input_report(hdev, mouse_report, 1706 size + 1); 1707 } 1708 1709 return false; 1710 } 1711 1712 switch (data[0]) { 1713 case REPORT_ID_DJ_SHORT: 1714 if (size != DJREPORT_SHORT_LENGTH) { 1715 hid_err(hdev, "Short DJ report bad size (%d)", size); 1716 return false; 1717 } 1718 return logi_dj_dj_event(hdev, report, data, size); 1719 case REPORT_ID_DJ_LONG: 1720 if (size != DJREPORT_LONG_LENGTH) { 1721 hid_err(hdev, "Long DJ report bad size (%d)", size); 1722 return false; 1723 } 1724 return logi_dj_dj_event(hdev, report, data, size); 1725 case REPORT_ID_HIDPP_SHORT: 1726 if (size != HIDPP_REPORT_SHORT_LENGTH) { 1727 hid_err(hdev, "Short HID++ report bad size (%d)", size); 1728 return false; 1729 } 1730 return logi_dj_hidpp_event(hdev, report, data, size); 1731 case REPORT_ID_HIDPP_LONG: 1732 if (size != HIDPP_REPORT_LONG_LENGTH) { 1733 hid_err(hdev, "Long HID++ report bad size (%d)", size); 1734 return false; 1735 } 1736 return logi_dj_hidpp_event(hdev, report, data, size); 1737 } 1738 1739 logi_dj_recv_forward_input_report(hdev, data, size); 1740 1741 return false; 1742 } 1743 1744 static int logi_dj_probe(struct hid_device *hdev, 1745 const struct hid_device_id *id) 1746 { 1747 struct hid_report_enum *rep_enum; 1748 struct hid_report *rep; 1749 struct dj_receiver_dev *djrcv_dev; 1750 struct usb_interface *intf; 1751 unsigned int no_dj_interfaces = 0; 1752 bool has_hidpp = false; 1753 unsigned long flags; 1754 int retval; 1755 1756 /* 1757 * Call to usbhid to fetch the HID descriptors of the current 1758 * interface subsequently call to the hid/hid-core to parse the 1759 * fetched descriptors. 1760 */ 1761 retval = hid_parse(hdev); 1762 if (retval) { 1763 hid_err(hdev, "%s: parse failed\n", __func__); 1764 return retval; 1765 } 1766 1767 /* 1768 * Some KVMs add an extra interface for e.g. mouse emulation. If we 1769 * treat these as logitech-dj interfaces then this causes input events 1770 * reported through this extra interface to not be reported correctly. 1771 * To avoid this, we treat these as generic-hid devices. 1772 */ 1773 switch (id->driver_data) { 1774 case recvr_type_dj: no_dj_interfaces = 3; break; 1775 case recvr_type_hidpp: no_dj_interfaces = 2; break; 1776 case recvr_type_gaming_hidpp: no_dj_interfaces = 3; break; 1777 case recvr_type_mouse_only: no_dj_interfaces = 2; break; 1778 case recvr_type_27mhz: no_dj_interfaces = 2; break; 1779 case recvr_type_bluetooth: no_dj_interfaces = 2; break; 1780 case recvr_type_dinovo: no_dj_interfaces = 2; break; 1781 } 1782 if (hid_is_usb(hdev)) { 1783 intf = to_usb_interface(hdev->dev.parent); 1784 if (intf && intf->altsetting->desc.bInterfaceNumber >= 1785 no_dj_interfaces) { 1786 hdev->quirks |= HID_QUIRK_INPUT_PER_APP; 1787 return hid_hw_start(hdev, HID_CONNECT_DEFAULT); 1788 } 1789 } 1790 1791 rep_enum = &hdev->report_enum[HID_INPUT_REPORT]; 1792 1793 /* no input reports, bail out */ 1794 if (list_empty(&rep_enum->report_list)) 1795 return -ENODEV; 1796 1797 /* 1798 * Check for the HID++ application. 1799 * Note: we should theoretically check for HID++ and DJ 1800 * collections, but this will do. 1801 */ 1802 list_for_each_entry(rep, &rep_enum->report_list, list) { 1803 if (rep->application == 0xff000001) 1804 has_hidpp = true; 1805 } 1806 1807 /* 1808 * Ignore interfaces without DJ/HID++ collection, they will not carry 1809 * any data, dont create any hid_device for them. 1810 */ 1811 if (!has_hidpp && id->driver_data == recvr_type_dj) 1812 return -ENODEV; 1813 1814 /* get the current application attached to the node */ 1815 rep = list_first_entry(&rep_enum->report_list, struct hid_report, list); 1816 djrcv_dev = dj_get_receiver_dev(hdev, id->driver_data, 1817 rep->application, has_hidpp); 1818 if (!djrcv_dev) { 1819 hid_err(hdev, "%s: dj_get_receiver_dev failed\n", __func__); 1820 return -ENOMEM; 1821 } 1822 1823 if (!rep_enum->numbered) 1824 djrcv_dev->unnumbered_application = rep->application; 1825 1826 /* Starts the usb device and connects to upper interfaces hiddev and 1827 * hidraw */ 1828 retval = hid_hw_start(hdev, HID_CONNECT_HIDRAW|HID_CONNECT_HIDDEV); 1829 if (retval) { 1830 hid_err(hdev, "%s: hid_hw_start returned error\n", __func__); 1831 goto hid_hw_start_fail; 1832 } 1833 1834 if (has_hidpp) { 1835 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); 1836 if (retval < 0) { 1837 hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n", 1838 __func__, retval); 1839 goto switch_to_dj_mode_fail; 1840 } 1841 } 1842 1843 /* This is enabling the polling urb on the IN endpoint */ 1844 retval = hid_hw_open(hdev); 1845 if (retval < 0) { 1846 hid_err(hdev, "%s: hid_hw_open returned error:%d\n", 1847 __func__, retval); 1848 goto llopen_failed; 1849 } 1850 1851 /* Allow incoming packets to arrive: */ 1852 hid_device_io_start(hdev); 1853 1854 if (has_hidpp) { 1855 spin_lock_irqsave(&djrcv_dev->lock, flags); 1856 djrcv_dev->ready = true; 1857 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1858 retval = logi_dj_recv_query_paired_devices(djrcv_dev); 1859 if (retval < 0) { 1860 hid_err(hdev, "%s: logi_dj_recv_query_paired_devices error:%d\n", 1861 __func__, retval); 1862 /* 1863 * This can happen with a KVM, let the probe succeed, 1864 * logi_dj_recv_queue_unknown_work will retry later. 1865 */ 1866 } 1867 } 1868 1869 return 0; 1870 1871 llopen_failed: 1872 switch_to_dj_mode_fail: 1873 hid_hw_stop(hdev); 1874 1875 hid_hw_start_fail: 1876 dj_put_receiver_dev(hdev); 1877 return retval; 1878 } 1879 1880 #ifdef CONFIG_PM 1881 static int logi_dj_reset_resume(struct hid_device *hdev) 1882 { 1883 int retval; 1884 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1885 1886 if (!djrcv_dev || djrcv_dev->hidpp != hdev) 1887 return 0; 1888 1889 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); 1890 if (retval < 0) { 1891 hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n", 1892 __func__, retval); 1893 } 1894 1895 return 0; 1896 } 1897 #endif 1898 1899 static void logi_dj_remove(struct hid_device *hdev) 1900 { 1901 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1902 struct dj_device *dj_dev; 1903 unsigned long flags; 1904 int i; 1905 1906 dbg_hid("%s\n", __func__); 1907 1908 if (!djrcv_dev) 1909 return hid_hw_stop(hdev); 1910 1911 /* 1912 * This ensures that if the work gets requeued from another 1913 * interface of the same receiver it will be a no-op. 1914 */ 1915 spin_lock_irqsave(&djrcv_dev->lock, flags); 1916 djrcv_dev->ready = false; 1917 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1918 1919 cancel_work_sync(&djrcv_dev->work); 1920 1921 hid_hw_close(hdev); 1922 hid_hw_stop(hdev); 1923 1924 /* 1925 * For proper operation we need access to all interfaces, so we destroy 1926 * the paired devices when we're unbound from any interface. 1927 * 1928 * Note we may still be bound to other interfaces, sharing the same 1929 * djrcv_dev, so we need locking here. 1930 */ 1931 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { 1932 spin_lock_irqsave(&djrcv_dev->lock, flags); 1933 dj_dev = djrcv_dev->paired_dj_devices[i]; 1934 djrcv_dev->paired_dj_devices[i] = NULL; 1935 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1936 if (dj_dev != NULL) { 1937 hid_destroy_device(dj_dev->hdev); 1938 kfree(dj_dev); 1939 } 1940 } 1941 1942 dj_put_receiver_dev(hdev); 1943 } 1944 1945 static const struct hid_device_id logi_dj_receivers[] = { 1946 { /* Logitech unifying receiver (0xc52b) */ 1947 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1948 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER), 1949 .driver_data = recvr_type_dj}, 1950 { /* Logitech unifying receiver (0xc532) */ 1951 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1952 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2), 1953 .driver_data = recvr_type_dj}, 1954 1955 { /* Logitech Nano mouse only receiver (0xc52f) */ 1956 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1957 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER), 1958 .driver_data = recvr_type_mouse_only}, 1959 { /* Logitech Nano (non DJ) receiver (0xc534) */ 1960 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1961 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_2), 1962 .driver_data = recvr_type_hidpp}, 1963 1964 { /* Logitech G700(s) receiver (0xc531) */ 1965 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1966 USB_DEVICE_ID_LOGITECH_G700_RECEIVER), 1967 .driver_data = recvr_type_gaming_hidpp}, 1968 { /* Logitech G602 receiver (0xc537) */ 1969 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1970 0xc537), 1971 .driver_data = recvr_type_gaming_hidpp}, 1972 { /* Logitech lightspeed receiver (0xc539) */ 1973 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1974 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1), 1975 .driver_data = recvr_type_gaming_hidpp}, 1976 { /* Logitech powerplay receiver (0xc53a) */ 1977 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1978 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_POWERPLAY), 1979 .driver_data = recvr_type_gaming_hidpp}, 1980 { /* Logitech lightspeed receiver (0xc53f) */ 1981 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1982 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_LIGHTSPEED_1_1), 1983 .driver_data = recvr_type_gaming_hidpp}, 1984 1985 { /* Logitech 27 MHz HID++ 1.0 receiver (0xc513) */ 1986 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_MX3000_RECEIVER), 1987 .driver_data = recvr_type_27mhz}, 1988 { /* Logitech 27 MHz HID++ 1.0 receiver (0xc517) */ 1989 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1990 USB_DEVICE_ID_S510_RECEIVER_2), 1991 .driver_data = recvr_type_27mhz}, 1992 { /* Logitech 27 MHz HID++ 1.0 mouse-only receiver (0xc51b) */ 1993 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1994 USB_DEVICE_ID_LOGITECH_27MHZ_MOUSE_RECEIVER), 1995 .driver_data = recvr_type_27mhz}, 1996 1997 { /* Logitech MX5000 HID++ / bluetooth receiver keyboard intf. (0xc70e) */ 1998 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1999 USB_DEVICE_ID_MX5000_RECEIVER_KBD_DEV), 2000 .driver_data = recvr_type_bluetooth}, 2001 { /* Logitech MX5000 HID++ / bluetooth receiver mouse intf. (0xc70a) */ 2002 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 2003 USB_DEVICE_ID_MX5000_RECEIVER_MOUSE_DEV), 2004 .driver_data = recvr_type_bluetooth}, 2005 { /* Logitech MX5500 HID++ / bluetooth receiver keyboard intf. (0xc71b) */ 2006 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 2007 USB_DEVICE_ID_MX5500_RECEIVER_KBD_DEV), 2008 .driver_data = recvr_type_bluetooth}, 2009 { /* Logitech MX5500 HID++ / bluetooth receiver mouse intf. (0xc71c) */ 2010 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 2011 USB_DEVICE_ID_MX5500_RECEIVER_MOUSE_DEV), 2012 .driver_data = recvr_type_bluetooth}, 2013 2014 { /* Logitech Dinovo Edge HID++ / bluetooth receiver keyboard intf. (0xc713) */ 2015 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 2016 USB_DEVICE_ID_DINOVO_EDGE_RECEIVER_KBD_DEV), 2017 .driver_data = recvr_type_dinovo}, 2018 { /* Logitech Dinovo Edge HID++ / bluetooth receiver mouse intf. (0xc714) */ 2019 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 2020 USB_DEVICE_ID_DINOVO_EDGE_RECEIVER_MOUSE_DEV), 2021 .driver_data = recvr_type_dinovo}, 2022 { /* Logitech DiNovo Mini HID++ / bluetooth receiver mouse intf. (0xc71e) */ 2023 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 2024 USB_DEVICE_ID_DINOVO_MINI_RECEIVER_KBD_DEV), 2025 .driver_data = recvr_type_dinovo}, 2026 { /* Logitech DiNovo Mini HID++ / bluetooth receiver keyboard intf. (0xc71f) */ 2027 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 2028 USB_DEVICE_ID_DINOVO_MINI_RECEIVER_MOUSE_DEV), 2029 .driver_data = recvr_type_dinovo}, 2030 {} 2031 }; 2032 2033 MODULE_DEVICE_TABLE(hid, logi_dj_receivers); 2034 2035 static struct hid_driver logi_djreceiver_driver = { 2036 .name = "logitech-djreceiver", 2037 .id_table = logi_dj_receivers, 2038 .probe = logi_dj_probe, 2039 .remove = logi_dj_remove, 2040 .raw_event = logi_dj_raw_event, 2041 #ifdef CONFIG_PM 2042 .reset_resume = logi_dj_reset_resume, 2043 #endif 2044 }; 2045 2046 module_hid_driver(logi_djreceiver_driver); 2047 2048 MODULE_LICENSE("GPL"); 2049 MODULE_AUTHOR("Logitech"); 2050 MODULE_AUTHOR("Nestor Lopez Casado"); 2051 MODULE_AUTHOR("nlopezcasad@logitech.com"); 2052