1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * HID driver for Logitech Unifying 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 6 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 6 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 MEDIA_CENTER BIT(8) 88 #define KBD_LEDS BIT(14) 89 /* Fake (bitnr > NUMBER_OF_HID_REPORTS) bit to track HID++ capability */ 90 #define HIDPP BIT_ULL(63) 91 92 /* HID++ Device Connected Notification */ 93 #define REPORT_TYPE_NOTIF_DEVICE_CONNECTED 0x41 94 #define HIDPP_PARAM_PROTO_TYPE 0x00 95 #define HIDPP_PARAM_DEVICE_INFO 0x01 96 #define HIDPP_PARAM_EQUAD_LSB 0x02 97 #define HIDPP_PARAM_EQUAD_MSB 0x03 98 #define HIDPP_PARAM_27MHZ_DEVID 0x03 99 #define HIDPP_DEVICE_TYPE_MASK GENMASK(3, 0) 100 #define HIDPP_LINK_STATUS_MASK BIT(6) 101 #define HIDPP_MANUFACTURER_MASK BIT(7) 102 103 #define HIDPP_DEVICE_TYPE_KEYBOARD 1 104 #define HIDPP_DEVICE_TYPE_MOUSE 2 105 106 #define HIDPP_SET_REGISTER 0x80 107 #define HIDPP_GET_LONG_REGISTER 0x83 108 #define HIDPP_REG_CONNECTION_STATE 0x02 109 #define HIDPP_REG_PAIRING_INFORMATION 0xB5 110 #define HIDPP_PAIRING_INFORMATION 0x20 111 #define HIDPP_FAKE_DEVICE_ARRIVAL 0x02 112 113 enum recvr_type { 114 recvr_type_dj, 115 recvr_type_hidpp, 116 recvr_type_gaming_hidpp, 117 recvr_type_mouse_only, 118 recvr_type_27mhz, 119 recvr_type_bluetooth, 120 }; 121 122 struct dj_report { 123 u8 report_id; 124 u8 device_index; 125 u8 report_type; 126 u8 report_params[DJREPORT_SHORT_LENGTH - 3]; 127 }; 128 129 struct hidpp_event { 130 u8 report_id; 131 u8 device_index; 132 u8 sub_id; 133 u8 params[HIDPP_REPORT_LONG_LENGTH - 3U]; 134 } __packed; 135 136 struct dj_receiver_dev { 137 struct hid_device *mouse; 138 struct hid_device *keyboard; 139 struct hid_device *hidpp; 140 struct dj_device *paired_dj_devices[DJ_MAX_PAIRED_DEVICES + 141 DJ_DEVICE_INDEX_MIN]; 142 struct list_head list; 143 struct kref kref; 144 struct work_struct work; 145 struct kfifo notif_fifo; 146 unsigned long last_query; /* in jiffies */ 147 bool ready; 148 enum recvr_type type; 149 unsigned int unnumbered_application; 150 spinlock_t lock; 151 }; 152 153 struct dj_device { 154 struct hid_device *hdev; 155 struct dj_receiver_dev *dj_receiver_dev; 156 u64 reports_supported; 157 u8 device_index; 158 }; 159 160 #define WORKITEM_TYPE_EMPTY 0 161 #define WORKITEM_TYPE_PAIRED 1 162 #define WORKITEM_TYPE_UNPAIRED 2 163 #define WORKITEM_TYPE_UNKNOWN 255 164 165 struct dj_workitem { 166 u8 type; /* WORKITEM_TYPE_* */ 167 u8 device_index; 168 u8 device_type; 169 u8 quad_id_msb; 170 u8 quad_id_lsb; 171 u64 reports_supported; 172 }; 173 174 /* Keyboard descriptor (1) */ 175 static const char kbd_descriptor[] = { 176 0x05, 0x01, /* USAGE_PAGE (generic Desktop) */ 177 0x09, 0x06, /* USAGE (Keyboard) */ 178 0xA1, 0x01, /* COLLECTION (Application) */ 179 0x85, 0x01, /* REPORT_ID (1) */ 180 0x95, 0x08, /* REPORT_COUNT (8) */ 181 0x75, 0x01, /* REPORT_SIZE (1) */ 182 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 183 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 184 0x05, 0x07, /* USAGE_PAGE (Keyboard) */ 185 0x19, 0xE0, /* USAGE_MINIMUM (Left Control) */ 186 0x29, 0xE7, /* USAGE_MAXIMUM (Right GUI) */ 187 0x81, 0x02, /* INPUT (Data,Var,Abs) */ 188 0x95, 0x06, /* REPORT_COUNT (6) */ 189 0x75, 0x08, /* REPORT_SIZE (8) */ 190 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 191 0x26, 0xFF, 0x00, /* LOGICAL_MAXIMUM (255) */ 192 0x05, 0x07, /* USAGE_PAGE (Keyboard) */ 193 0x19, 0x00, /* USAGE_MINIMUM (no event) */ 194 0x2A, 0xFF, 0x00, /* USAGE_MAXIMUM (reserved) */ 195 0x81, 0x00, /* INPUT (Data,Ary,Abs) */ 196 0x85, 0x0e, /* REPORT_ID (14) */ 197 0x05, 0x08, /* USAGE PAGE (LED page) */ 198 0x95, 0x05, /* REPORT COUNT (5) */ 199 0x75, 0x01, /* REPORT SIZE (1) */ 200 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 201 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 202 0x19, 0x01, /* USAGE MINIMUM (1) */ 203 0x29, 0x05, /* USAGE MAXIMUM (5) */ 204 0x91, 0x02, /* OUTPUT (Data, Variable, Absolute) */ 205 0x95, 0x01, /* REPORT COUNT (1) */ 206 0x75, 0x03, /* REPORT SIZE (3) */ 207 0x91, 0x01, /* OUTPUT (Constant) */ 208 0xC0 209 }; 210 211 /* Mouse descriptor (2) */ 212 static const char mse_descriptor[] = { 213 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 214 0x09, 0x02, /* USAGE (Mouse) */ 215 0xA1, 0x01, /* COLLECTION (Application) */ 216 0x85, 0x02, /* REPORT_ID = 2 */ 217 0x09, 0x01, /* USAGE (pointer) */ 218 0xA1, 0x00, /* COLLECTION (physical) */ 219 0x05, 0x09, /* USAGE_PAGE (buttons) */ 220 0x19, 0x01, /* USAGE_MIN (1) */ 221 0x29, 0x10, /* USAGE_MAX (16) */ 222 0x15, 0x00, /* LOGICAL_MIN (0) */ 223 0x25, 0x01, /* LOGICAL_MAX (1) */ 224 0x95, 0x10, /* REPORT_COUNT (16) */ 225 0x75, 0x01, /* REPORT_SIZE (1) */ 226 0x81, 0x02, /* INPUT (data var abs) */ 227 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 228 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ 229 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ 230 0x75, 0x0C, /* REPORT_SIZE (12) */ 231 0x95, 0x02, /* REPORT_COUNT (2) */ 232 0x09, 0x30, /* USAGE (X) */ 233 0x09, 0x31, /* USAGE (Y) */ 234 0x81, 0x06, /* INPUT */ 235 0x15, 0x81, /* LOGICAL_MIN (-127) */ 236 0x25, 0x7F, /* LOGICAL_MAX (127) */ 237 0x75, 0x08, /* REPORT_SIZE (8) */ 238 0x95, 0x01, /* REPORT_COUNT (1) */ 239 0x09, 0x38, /* USAGE (wheel) */ 240 0x81, 0x06, /* INPUT */ 241 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 242 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 243 0x95, 0x01, /* REPORT_COUNT (1) */ 244 0x81, 0x06, /* INPUT */ 245 0xC0, /* END_COLLECTION */ 246 0xC0, /* END_COLLECTION */ 247 }; 248 249 /* Mouse descriptor (2) for 27 MHz receiver, only 8 buttons */ 250 static const char mse_27mhz_descriptor[] = { 251 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 252 0x09, 0x02, /* USAGE (Mouse) */ 253 0xA1, 0x01, /* COLLECTION (Application) */ 254 0x85, 0x02, /* REPORT_ID = 2 */ 255 0x09, 0x01, /* USAGE (pointer) */ 256 0xA1, 0x00, /* COLLECTION (physical) */ 257 0x05, 0x09, /* USAGE_PAGE (buttons) */ 258 0x19, 0x01, /* USAGE_MIN (1) */ 259 0x29, 0x08, /* USAGE_MAX (8) */ 260 0x15, 0x00, /* LOGICAL_MIN (0) */ 261 0x25, 0x01, /* LOGICAL_MAX (1) */ 262 0x95, 0x08, /* REPORT_COUNT (8) */ 263 0x75, 0x01, /* REPORT_SIZE (1) */ 264 0x81, 0x02, /* INPUT (data var abs) */ 265 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 266 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ 267 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ 268 0x75, 0x0C, /* REPORT_SIZE (12) */ 269 0x95, 0x02, /* REPORT_COUNT (2) */ 270 0x09, 0x30, /* USAGE (X) */ 271 0x09, 0x31, /* USAGE (Y) */ 272 0x81, 0x06, /* INPUT */ 273 0x15, 0x81, /* LOGICAL_MIN (-127) */ 274 0x25, 0x7F, /* LOGICAL_MAX (127) */ 275 0x75, 0x08, /* REPORT_SIZE (8) */ 276 0x95, 0x01, /* REPORT_COUNT (1) */ 277 0x09, 0x38, /* USAGE (wheel) */ 278 0x81, 0x06, /* INPUT */ 279 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 280 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 281 0x95, 0x01, /* REPORT_COUNT (1) */ 282 0x81, 0x06, /* INPUT */ 283 0xC0, /* END_COLLECTION */ 284 0xC0, /* END_COLLECTION */ 285 }; 286 287 /* Mouse descriptor (2) for Bluetooth receiver, low-res hwheel, 12 buttons */ 288 static const char mse_bluetooth_descriptor[] = { 289 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 290 0x09, 0x02, /* USAGE (Mouse) */ 291 0xA1, 0x01, /* COLLECTION (Application) */ 292 0x85, 0x02, /* REPORT_ID = 2 */ 293 0x09, 0x01, /* USAGE (pointer) */ 294 0xA1, 0x00, /* COLLECTION (physical) */ 295 0x05, 0x09, /* USAGE_PAGE (buttons) */ 296 0x19, 0x01, /* USAGE_MIN (1) */ 297 0x29, 0x08, /* USAGE_MAX (8) */ 298 0x15, 0x00, /* LOGICAL_MIN (0) */ 299 0x25, 0x01, /* LOGICAL_MAX (1) */ 300 0x95, 0x08, /* REPORT_COUNT (8) */ 301 0x75, 0x01, /* REPORT_SIZE (1) */ 302 0x81, 0x02, /* INPUT (data var abs) */ 303 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 304 0x16, 0x01, 0xF8, /* LOGICAL_MIN (-2047) */ 305 0x26, 0xFF, 0x07, /* LOGICAL_MAX (2047) */ 306 0x75, 0x0C, /* REPORT_SIZE (12) */ 307 0x95, 0x02, /* REPORT_COUNT (2) */ 308 0x09, 0x30, /* USAGE (X) */ 309 0x09, 0x31, /* USAGE (Y) */ 310 0x81, 0x06, /* INPUT */ 311 0x15, 0x81, /* LOGICAL_MIN (-127) */ 312 0x25, 0x7F, /* LOGICAL_MAX (127) */ 313 0x75, 0x08, /* REPORT_SIZE (8) */ 314 0x95, 0x01, /* REPORT_COUNT (1) */ 315 0x09, 0x38, /* USAGE (wheel) */ 316 0x81, 0x06, /* INPUT */ 317 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 318 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 319 0x15, 0xF9, /* LOGICAL_MIN (-7) */ 320 0x25, 0x07, /* LOGICAL_MAX (7) */ 321 0x75, 0x04, /* REPORT_SIZE (4) */ 322 0x95, 0x01, /* REPORT_COUNT (1) */ 323 0x81, 0x06, /* INPUT */ 324 0x05, 0x09, /* USAGE_PAGE (buttons) */ 325 0x19, 0x09, /* USAGE_MIN (9) */ 326 0x29, 0x0C, /* USAGE_MAX (12) */ 327 0x15, 0x00, /* LOGICAL_MIN (0) */ 328 0x25, 0x01, /* LOGICAL_MAX (1) */ 329 0x75, 0x01, /* REPORT_SIZE (1) */ 330 0x95, 0x04, /* REPORT_COUNT (4) */ 331 0x81, 0x06, /* INPUT */ 332 0xC0, /* END_COLLECTION */ 333 0xC0, /* END_COLLECTION */ 334 }; 335 336 /* Gaming Mouse descriptor (2) */ 337 static const char mse_high_res_descriptor[] = { 338 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 339 0x09, 0x02, /* USAGE (Mouse) */ 340 0xA1, 0x01, /* COLLECTION (Application) */ 341 0x85, 0x02, /* REPORT_ID = 2 */ 342 0x09, 0x01, /* USAGE (pointer) */ 343 0xA1, 0x00, /* COLLECTION (physical) */ 344 0x05, 0x09, /* USAGE_PAGE (buttons) */ 345 0x19, 0x01, /* USAGE_MIN (1) */ 346 0x29, 0x10, /* USAGE_MAX (16) */ 347 0x15, 0x00, /* LOGICAL_MIN (0) */ 348 0x25, 0x01, /* LOGICAL_MAX (1) */ 349 0x95, 0x10, /* REPORT_COUNT (16) */ 350 0x75, 0x01, /* REPORT_SIZE (1) */ 351 0x81, 0x02, /* INPUT (data var abs) */ 352 0x05, 0x01, /* USAGE_PAGE (generic desktop) */ 353 0x16, 0x01, 0x80, /* LOGICAL_MIN (-32767) */ 354 0x26, 0xFF, 0x7F, /* LOGICAL_MAX (32767) */ 355 0x75, 0x10, /* REPORT_SIZE (16) */ 356 0x95, 0x02, /* REPORT_COUNT (2) */ 357 0x09, 0x30, /* USAGE (X) */ 358 0x09, 0x31, /* USAGE (Y) */ 359 0x81, 0x06, /* INPUT */ 360 0x15, 0x81, /* LOGICAL_MIN (-127) */ 361 0x25, 0x7F, /* LOGICAL_MAX (127) */ 362 0x75, 0x08, /* REPORT_SIZE (8) */ 363 0x95, 0x01, /* REPORT_COUNT (1) */ 364 0x09, 0x38, /* USAGE (wheel) */ 365 0x81, 0x06, /* INPUT */ 366 0x05, 0x0C, /* USAGE_PAGE(consumer) */ 367 0x0A, 0x38, 0x02, /* USAGE(AC Pan) */ 368 0x95, 0x01, /* REPORT_COUNT (1) */ 369 0x81, 0x06, /* INPUT */ 370 0xC0, /* END_COLLECTION */ 371 0xC0, /* END_COLLECTION */ 372 }; 373 374 /* Consumer Control descriptor (3) */ 375 static const char consumer_descriptor[] = { 376 0x05, 0x0C, /* USAGE_PAGE (Consumer Devices) */ 377 0x09, 0x01, /* USAGE (Consumer Control) */ 378 0xA1, 0x01, /* COLLECTION (Application) */ 379 0x85, 0x03, /* REPORT_ID = 3 */ 380 0x75, 0x10, /* REPORT_SIZE (16) */ 381 0x95, 0x02, /* REPORT_COUNT (2) */ 382 0x15, 0x01, /* LOGICAL_MIN (1) */ 383 0x26, 0x8C, 0x02, /* LOGICAL_MAX (652) */ 384 0x19, 0x01, /* USAGE_MIN (1) */ 385 0x2A, 0x8C, 0x02, /* USAGE_MAX (652) */ 386 0x81, 0x00, /* INPUT (Data Ary Abs) */ 387 0xC0, /* END_COLLECTION */ 388 }; /* */ 389 390 /* System control descriptor (4) */ 391 static const char syscontrol_descriptor[] = { 392 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 393 0x09, 0x80, /* USAGE (System Control) */ 394 0xA1, 0x01, /* COLLECTION (Application) */ 395 0x85, 0x04, /* REPORT_ID = 4 */ 396 0x75, 0x02, /* REPORT_SIZE (2) */ 397 0x95, 0x01, /* REPORT_COUNT (1) */ 398 0x15, 0x01, /* LOGICAL_MIN (1) */ 399 0x25, 0x03, /* LOGICAL_MAX (3) */ 400 0x09, 0x82, /* USAGE (System Sleep) */ 401 0x09, 0x81, /* USAGE (System Power Down) */ 402 0x09, 0x83, /* USAGE (System Wake Up) */ 403 0x81, 0x60, /* INPUT (Data Ary Abs NPrf Null) */ 404 0x75, 0x06, /* REPORT_SIZE (6) */ 405 0x81, 0x03, /* INPUT (Cnst Var Abs) */ 406 0xC0, /* END_COLLECTION */ 407 }; 408 409 /* Media descriptor (8) */ 410 static const char media_descriptor[] = { 411 0x06, 0xbc, 0xff, /* Usage Page 0xffbc */ 412 0x09, 0x88, /* Usage 0x0088 */ 413 0xa1, 0x01, /* BeginCollection */ 414 0x85, 0x08, /* Report ID 8 */ 415 0x19, 0x01, /* Usage Min 0x0001 */ 416 0x29, 0xff, /* Usage Max 0x00ff */ 417 0x15, 0x01, /* Logical Min 1 */ 418 0x26, 0xff, 0x00, /* Logical Max 255 */ 419 0x75, 0x08, /* Report Size 8 */ 420 0x95, 0x01, /* Report Count 1 */ 421 0x81, 0x00, /* Input */ 422 0xc0, /* EndCollection */ 423 }; /* */ 424 425 /* HIDPP descriptor */ 426 static const char hidpp_descriptor[] = { 427 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 428 0x09, 0x01, /* Usage (Vendor Usage 1) */ 429 0xa1, 0x01, /* Collection (Application) */ 430 0x85, 0x10, /* Report ID (16) */ 431 0x75, 0x08, /* Report Size (8) */ 432 0x95, 0x06, /* Report Count (6) */ 433 0x15, 0x00, /* Logical Minimum (0) */ 434 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 435 0x09, 0x01, /* Usage (Vendor Usage 1) */ 436 0x81, 0x00, /* Input (Data,Arr,Abs) */ 437 0x09, 0x01, /* Usage (Vendor Usage 1) */ 438 0x91, 0x00, /* Output (Data,Arr,Abs) */ 439 0xc0, /* End Collection */ 440 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 441 0x09, 0x02, /* Usage (Vendor Usage 2) */ 442 0xa1, 0x01, /* Collection (Application) */ 443 0x85, 0x11, /* Report ID (17) */ 444 0x75, 0x08, /* Report Size (8) */ 445 0x95, 0x13, /* Report Count (19) */ 446 0x15, 0x00, /* Logical Minimum (0) */ 447 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 448 0x09, 0x02, /* Usage (Vendor Usage 2) */ 449 0x81, 0x00, /* Input (Data,Arr,Abs) */ 450 0x09, 0x02, /* Usage (Vendor Usage 2) */ 451 0x91, 0x00, /* Output (Data,Arr,Abs) */ 452 0xc0, /* End Collection */ 453 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 454 0x09, 0x04, /* Usage (Vendor Usage 0x04) */ 455 0xa1, 0x01, /* Collection (Application) */ 456 0x85, 0x20, /* Report ID (32) */ 457 0x75, 0x08, /* Report Size (8) */ 458 0x95, 0x0e, /* Report Count (14) */ 459 0x15, 0x00, /* Logical Minimum (0) */ 460 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 461 0x09, 0x41, /* Usage (Vendor Usage 0x41) */ 462 0x81, 0x00, /* Input (Data,Arr,Abs) */ 463 0x09, 0x41, /* Usage (Vendor Usage 0x41) */ 464 0x91, 0x00, /* Output (Data,Arr,Abs) */ 465 0x85, 0x21, /* Report ID (33) */ 466 0x95, 0x1f, /* Report Count (31) */ 467 0x15, 0x00, /* Logical Minimum (0) */ 468 0x26, 0xff, 0x00, /* Logical Maximum (255) */ 469 0x09, 0x42, /* Usage (Vendor Usage 0x42) */ 470 0x81, 0x00, /* Input (Data,Arr,Abs) */ 471 0x09, 0x42, /* Usage (Vendor Usage 0x42) */ 472 0x91, 0x00, /* Output (Data,Arr,Abs) */ 473 0xc0, /* End Collection */ 474 }; 475 476 /* Maximum size of all defined hid reports in bytes (including report id) */ 477 #define MAX_REPORT_SIZE 8 478 479 /* Make sure all descriptors are present here */ 480 #define MAX_RDESC_SIZE \ 481 (sizeof(kbd_descriptor) + \ 482 sizeof(mse_bluetooth_descriptor) + \ 483 sizeof(consumer_descriptor) + \ 484 sizeof(syscontrol_descriptor) + \ 485 sizeof(media_descriptor) + \ 486 sizeof(hidpp_descriptor)) 487 488 /* Number of possible hid report types that can be created by this driver. 489 * 490 * Right now, RF report types have the same report types (or report id's) 491 * than the hid report created from those RF reports. In the future 492 * this doesnt have to be true. 493 * 494 * For instance, RF report type 0x01 which has a size of 8 bytes, corresponds 495 * to hid report id 0x01, this is standard keyboard. Same thing applies to mice 496 * reports and consumer control, etc. If a new RF report is created, it doesn't 497 * has to have the same report id as its corresponding hid report, so an 498 * translation may have to take place for future report types. 499 */ 500 #define NUMBER_OF_HID_REPORTS 32 501 static const u8 hid_reportid_size_map[NUMBER_OF_HID_REPORTS] = { 502 [1] = 8, /* Standard keyboard */ 503 [2] = 8, /* Standard mouse */ 504 [3] = 5, /* Consumer control */ 505 [4] = 2, /* System control */ 506 [8] = 2, /* Media Center */ 507 }; 508 509 510 #define LOGITECH_DJ_INTERFACE_NUMBER 0x02 511 512 static struct hid_ll_driver logi_dj_ll_driver; 513 514 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev); 515 static void delayedwork_callback(struct work_struct *work); 516 517 static LIST_HEAD(dj_hdev_list); 518 static DEFINE_MUTEX(dj_hdev_list_lock); 519 520 /* 521 * dj/HID++ receivers are really a single logical entity, but for BIOS/Windows 522 * compatibility they have multiple USB interfaces. On HID++ receivers we need 523 * to listen for input reports on both interfaces. The functions below are used 524 * to create a single struct dj_receiver_dev for all interfaces belonging to 525 * a single USB-device / receiver. 526 */ 527 static struct dj_receiver_dev *dj_find_receiver_dev(struct hid_device *hdev, 528 enum recvr_type type) 529 { 530 struct dj_receiver_dev *djrcv_dev; 531 char sep; 532 533 /* 534 * The bluetooth receiver contains a built-in hub and has separate 535 * USB-devices for the keyboard and mouse interfaces. 536 */ 537 sep = (type == recvr_type_bluetooth) ? '.' : '/'; 538 539 /* Try to find an already-probed interface from the same device */ 540 list_for_each_entry(djrcv_dev, &dj_hdev_list, list) { 541 if (djrcv_dev->mouse && 542 hid_compare_device_paths(hdev, djrcv_dev->mouse, sep)) { 543 kref_get(&djrcv_dev->kref); 544 return djrcv_dev; 545 } 546 if (djrcv_dev->keyboard && 547 hid_compare_device_paths(hdev, djrcv_dev->keyboard, sep)) { 548 kref_get(&djrcv_dev->kref); 549 return djrcv_dev; 550 } 551 if (djrcv_dev->hidpp && 552 hid_compare_device_paths(hdev, djrcv_dev->hidpp, sep)) { 553 kref_get(&djrcv_dev->kref); 554 return djrcv_dev; 555 } 556 } 557 558 return NULL; 559 } 560 561 static void dj_release_receiver_dev(struct kref *kref) 562 { 563 struct dj_receiver_dev *djrcv_dev = container_of(kref, struct dj_receiver_dev, kref); 564 565 list_del(&djrcv_dev->list); 566 kfifo_free(&djrcv_dev->notif_fifo); 567 kfree(djrcv_dev); 568 } 569 570 static void dj_put_receiver_dev(struct hid_device *hdev) 571 { 572 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 573 574 mutex_lock(&dj_hdev_list_lock); 575 576 if (djrcv_dev->mouse == hdev) 577 djrcv_dev->mouse = NULL; 578 if (djrcv_dev->keyboard == hdev) 579 djrcv_dev->keyboard = NULL; 580 if (djrcv_dev->hidpp == hdev) 581 djrcv_dev->hidpp = NULL; 582 583 kref_put(&djrcv_dev->kref, dj_release_receiver_dev); 584 585 mutex_unlock(&dj_hdev_list_lock); 586 } 587 588 static struct dj_receiver_dev *dj_get_receiver_dev(struct hid_device *hdev, 589 enum recvr_type type, 590 unsigned int application, 591 bool is_hidpp) 592 { 593 struct dj_receiver_dev *djrcv_dev; 594 595 mutex_lock(&dj_hdev_list_lock); 596 597 djrcv_dev = dj_find_receiver_dev(hdev, type); 598 if (!djrcv_dev) { 599 djrcv_dev = kzalloc(sizeof(*djrcv_dev), GFP_KERNEL); 600 if (!djrcv_dev) 601 goto out; 602 603 INIT_WORK(&djrcv_dev->work, delayedwork_callback); 604 spin_lock_init(&djrcv_dev->lock); 605 if (kfifo_alloc(&djrcv_dev->notif_fifo, 606 DJ_MAX_NUMBER_NOTIFS * sizeof(struct dj_workitem), 607 GFP_KERNEL)) { 608 kfree(djrcv_dev); 609 djrcv_dev = NULL; 610 goto out; 611 } 612 kref_init(&djrcv_dev->kref); 613 list_add_tail(&djrcv_dev->list, &dj_hdev_list); 614 djrcv_dev->last_query = jiffies; 615 djrcv_dev->type = type; 616 } 617 618 if (application == HID_GD_KEYBOARD) 619 djrcv_dev->keyboard = hdev; 620 if (application == HID_GD_MOUSE) 621 djrcv_dev->mouse = hdev; 622 if (is_hidpp) 623 djrcv_dev->hidpp = hdev; 624 625 hid_set_drvdata(hdev, djrcv_dev); 626 out: 627 mutex_unlock(&dj_hdev_list_lock); 628 return djrcv_dev; 629 } 630 631 static void logi_dj_recv_destroy_djhid_device(struct dj_receiver_dev *djrcv_dev, 632 struct dj_workitem *workitem) 633 { 634 /* Called in delayed work context */ 635 struct dj_device *dj_dev; 636 unsigned long flags; 637 638 spin_lock_irqsave(&djrcv_dev->lock, flags); 639 dj_dev = djrcv_dev->paired_dj_devices[workitem->device_index]; 640 djrcv_dev->paired_dj_devices[workitem->device_index] = NULL; 641 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 642 643 if (dj_dev != NULL) { 644 hid_destroy_device(dj_dev->hdev); 645 kfree(dj_dev); 646 } else { 647 hid_err(djrcv_dev->hidpp, "%s: can't destroy a NULL device\n", 648 __func__); 649 } 650 } 651 652 static void logi_dj_recv_add_djhid_device(struct dj_receiver_dev *djrcv_dev, 653 struct dj_workitem *workitem) 654 { 655 /* Called in delayed work context */ 656 struct hid_device *djrcv_hdev = djrcv_dev->hidpp; 657 struct hid_device *dj_hiddev; 658 struct dj_device *dj_dev; 659 u8 device_index = workitem->device_index; 660 unsigned long flags; 661 662 /* Device index goes from 1 to 6, we need 3 bytes to store the 663 * semicolon, the index, and a null terminator 664 */ 665 unsigned char tmpstr[3]; 666 667 /* We are the only one ever adding a device, no need to lock */ 668 if (djrcv_dev->paired_dj_devices[device_index]) { 669 /* The device is already known. No need to reallocate it. */ 670 dbg_hid("%s: device is already known\n", __func__); 671 return; 672 } 673 674 dj_hiddev = hid_allocate_device(); 675 if (IS_ERR(dj_hiddev)) { 676 hid_err(djrcv_hdev, "%s: hid_allocate_dev failed\n", __func__); 677 return; 678 } 679 680 dj_hiddev->ll_driver = &logi_dj_ll_driver; 681 682 dj_hiddev->dev.parent = &djrcv_hdev->dev; 683 dj_hiddev->bus = BUS_USB; 684 dj_hiddev->vendor = djrcv_hdev->vendor; 685 dj_hiddev->product = (workitem->quad_id_msb << 8) | 686 workitem->quad_id_lsb; 687 if (workitem->device_type) { 688 const char *type_str = "Device"; 689 690 switch (workitem->device_type) { 691 case 0x01: type_str = "Keyboard"; break; 692 case 0x02: type_str = "Mouse"; break; 693 case 0x03: type_str = "Numpad"; break; 694 case 0x04: type_str = "Presenter"; break; 695 case 0x07: type_str = "Remote Control"; break; 696 case 0x08: type_str = "Trackball"; break; 697 case 0x09: type_str = "Touchpad"; break; 698 } 699 snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), 700 "Logitech Wireless %s PID:%04x", 701 type_str, dj_hiddev->product); 702 } else { 703 snprintf(dj_hiddev->name, sizeof(dj_hiddev->name), 704 "Logitech Unifying Device. Wireless PID:%04x", 705 dj_hiddev->product); 706 } 707 708 if (djrcv_dev->type == recvr_type_27mhz) 709 dj_hiddev->group = HID_GROUP_LOGITECH_27MHZ_DEVICE; 710 else 711 dj_hiddev->group = HID_GROUP_LOGITECH_DJ_DEVICE; 712 713 memcpy(dj_hiddev->phys, djrcv_hdev->phys, sizeof(djrcv_hdev->phys)); 714 snprintf(tmpstr, sizeof(tmpstr), ":%d", device_index); 715 strlcat(dj_hiddev->phys, tmpstr, sizeof(dj_hiddev->phys)); 716 717 dj_dev = kzalloc(sizeof(struct dj_device), GFP_KERNEL); 718 719 if (!dj_dev) { 720 hid_err(djrcv_hdev, "%s: failed allocating dj_dev\n", __func__); 721 goto dj_device_allocate_fail; 722 } 723 724 dj_dev->reports_supported = workitem->reports_supported; 725 dj_dev->hdev = dj_hiddev; 726 dj_dev->dj_receiver_dev = djrcv_dev; 727 dj_dev->device_index = device_index; 728 dj_hiddev->driver_data = dj_dev; 729 730 spin_lock_irqsave(&djrcv_dev->lock, flags); 731 djrcv_dev->paired_dj_devices[device_index] = dj_dev; 732 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 733 734 if (hid_add_device(dj_hiddev)) { 735 hid_err(djrcv_hdev, "%s: failed adding dj_device\n", __func__); 736 goto hid_add_device_fail; 737 } 738 739 return; 740 741 hid_add_device_fail: 742 spin_lock_irqsave(&djrcv_dev->lock, flags); 743 djrcv_dev->paired_dj_devices[device_index] = NULL; 744 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 745 kfree(dj_dev); 746 dj_device_allocate_fail: 747 hid_destroy_device(dj_hiddev); 748 } 749 750 static void delayedwork_callback(struct work_struct *work) 751 { 752 struct dj_receiver_dev *djrcv_dev = 753 container_of(work, struct dj_receiver_dev, work); 754 755 struct dj_workitem workitem; 756 unsigned long flags; 757 int count; 758 int retval; 759 760 dbg_hid("%s\n", __func__); 761 762 spin_lock_irqsave(&djrcv_dev->lock, flags); 763 764 /* 765 * Since we attach to multiple interfaces, we may get scheduled before 766 * we are bound to the HID++ interface, catch this. 767 */ 768 if (!djrcv_dev->ready) { 769 pr_warn("%s: delayedwork queued before hidpp interface was enumerated\n", 770 __func__); 771 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 772 return; 773 } 774 775 count = kfifo_out(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 776 777 if (count != sizeof(workitem)) { 778 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 779 return; 780 } 781 782 if (!kfifo_is_empty(&djrcv_dev->notif_fifo)) 783 schedule_work(&djrcv_dev->work); 784 785 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 786 787 switch (workitem.type) { 788 case WORKITEM_TYPE_PAIRED: 789 logi_dj_recv_add_djhid_device(djrcv_dev, &workitem); 790 break; 791 case WORKITEM_TYPE_UNPAIRED: 792 logi_dj_recv_destroy_djhid_device(djrcv_dev, &workitem); 793 break; 794 case WORKITEM_TYPE_UNKNOWN: 795 retval = logi_dj_recv_query_paired_devices(djrcv_dev); 796 if (retval) { 797 hid_err(djrcv_dev->hidpp, "%s: logi_dj_recv_query_paired_devices error: %d\n", 798 __func__, retval); 799 } 800 break; 801 case WORKITEM_TYPE_EMPTY: 802 dbg_hid("%s: device list is empty\n", __func__); 803 break; 804 } 805 } 806 807 /* 808 * Sometimes we receive reports for which we do not have a paired dj_device 809 * associated with the device_index or report-type to forward the report to. 810 * This means that the original "device paired" notification corresponding 811 * to the dj_device never arrived to this driver. Possible reasons for this are: 812 * 1) hid-core discards all packets coming from a device during probe(). 813 * 2) if the receiver is plugged into a KVM switch then the pairing reports 814 * are only forwarded to it if the focus is on this PC. 815 * This function deals with this by re-asking the receiver for the list of 816 * connected devices in the delayed work callback. 817 * This function MUST be called with djrcv->lock held. 818 */ 819 static void logi_dj_recv_queue_unknown_work(struct dj_receiver_dev *djrcv_dev) 820 { 821 struct dj_workitem workitem = { .type = WORKITEM_TYPE_UNKNOWN }; 822 823 /* Rate limit queries done because of unhandeled reports to 2/sec */ 824 if (time_before(jiffies, djrcv_dev->last_query + HZ / 2)) 825 return; 826 827 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 828 schedule_work(&djrcv_dev->work); 829 } 830 831 static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev, 832 struct dj_report *dj_report) 833 { 834 /* We are called from atomic context (tasklet && djrcv->lock held) */ 835 struct dj_workitem workitem = { 836 .device_index = dj_report->device_index, 837 }; 838 839 switch (dj_report->report_type) { 840 case REPORT_TYPE_NOTIF_DEVICE_PAIRED: 841 workitem.type = WORKITEM_TYPE_PAIRED; 842 if (dj_report->report_params[DEVICE_PAIRED_PARAM_SPFUNCTION] & 843 SPFUNCTION_DEVICE_LIST_EMPTY) { 844 workitem.type = WORKITEM_TYPE_EMPTY; 845 break; 846 } 847 /* fall-through */ 848 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: 849 workitem.quad_id_msb = 850 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB]; 851 workitem.quad_id_lsb = 852 dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_LSB]; 853 workitem.reports_supported = get_unaligned_le32( 854 dj_report->report_params + 855 DEVICE_PAIRED_RF_REPORT_TYPE); 856 workitem.reports_supported |= HIDPP; 857 if (dj_report->report_type == REPORT_TYPE_NOTIF_DEVICE_UNPAIRED) 858 workitem.type = WORKITEM_TYPE_UNPAIRED; 859 break; 860 default: 861 logi_dj_recv_queue_unknown_work(djrcv_dev); 862 return; 863 } 864 865 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 866 schedule_work(&djrcv_dev->work); 867 } 868 869 static void logi_hidpp_dev_conn_notif_equad(struct hid_device *hdev, 870 struct hidpp_event *hidpp_report, 871 struct dj_workitem *workitem) 872 { 873 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 874 875 workitem->type = WORKITEM_TYPE_PAIRED; 876 workitem->device_type = hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & 877 HIDPP_DEVICE_TYPE_MASK; 878 workitem->quad_id_msb = hidpp_report->params[HIDPP_PARAM_EQUAD_MSB]; 879 workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_EQUAD_LSB]; 880 switch (workitem->device_type) { 881 case REPORT_TYPE_KEYBOARD: 882 workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA | 883 POWER_KEYS | MEDIA_CENTER | 884 HIDPP; 885 break; 886 case REPORT_TYPE_MOUSE: 887 workitem->reports_supported |= STD_MOUSE | HIDPP; 888 if (djrcv_dev->type == recvr_type_mouse_only) 889 workitem->reports_supported |= MULTIMEDIA; 890 break; 891 } 892 } 893 894 static void logi_hidpp_dev_conn_notif_27mhz(struct hid_device *hdev, 895 struct hidpp_event *hidpp_report, 896 struct dj_workitem *workitem) 897 { 898 workitem->type = WORKITEM_TYPE_PAIRED; 899 workitem->quad_id_lsb = hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID]; 900 switch (hidpp_report->device_index) { 901 case 1: /* Index 1 is always a mouse */ 902 case 2: /* Index 2 is always a mouse */ 903 workitem->device_type = HIDPP_DEVICE_TYPE_MOUSE; 904 workitem->reports_supported |= STD_MOUSE | HIDPP; 905 break; 906 case 3: /* Index 3 is always the keyboard */ 907 case 4: /* Index 4 is used for an optional separate numpad */ 908 workitem->device_type = HIDPP_DEVICE_TYPE_KEYBOARD; 909 workitem->reports_supported |= STD_KEYBOARD | MULTIMEDIA | 910 POWER_KEYS | HIDPP; 911 break; 912 default: 913 hid_warn(hdev, "%s: unexpected device-index %d", __func__, 914 hidpp_report->device_index); 915 } 916 } 917 918 static void logi_hidpp_recv_queue_notif(struct hid_device *hdev, 919 struct hidpp_event *hidpp_report) 920 { 921 /* We are called from atomic context (tasklet && djrcv->lock held) */ 922 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 923 const char *device_type = "UNKNOWN"; 924 struct dj_workitem workitem = { 925 .type = WORKITEM_TYPE_EMPTY, 926 .device_index = hidpp_report->device_index, 927 }; 928 929 switch (hidpp_report->params[HIDPP_PARAM_PROTO_TYPE]) { 930 case 0x01: 931 device_type = "Bluetooth"; 932 /* Bluetooth connect packet contents is the same as (e)QUAD */ 933 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 934 if (!(hidpp_report->params[HIDPP_PARAM_DEVICE_INFO] & 935 HIDPP_MANUFACTURER_MASK)) { 936 hid_info(hdev, "Non Logitech device connected on slot %d\n", 937 hidpp_report->device_index); 938 workitem.reports_supported &= ~HIDPP; 939 } 940 break; 941 case 0x02: 942 device_type = "27 Mhz"; 943 logi_hidpp_dev_conn_notif_27mhz(hdev, hidpp_report, &workitem); 944 break; 945 case 0x03: 946 device_type = "QUAD or eQUAD"; 947 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 948 break; 949 case 0x04: 950 device_type = "eQUAD step 4 DJ"; 951 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 952 break; 953 case 0x05: 954 device_type = "DFU Lite"; 955 break; 956 case 0x06: 957 device_type = "eQUAD step 4 Lite"; 958 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 959 break; 960 case 0x07: 961 device_type = "eQUAD step 4 Gaming"; 962 break; 963 case 0x08: 964 device_type = "eQUAD step 4 for gamepads"; 965 break; 966 case 0x0a: 967 device_type = "eQUAD nano Lite"; 968 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 969 break; 970 case 0x0c: 971 device_type = "eQUAD Lightspeed"; 972 logi_hidpp_dev_conn_notif_equad(hdev, hidpp_report, &workitem); 973 workitem.reports_supported |= STD_KEYBOARD; 974 break; 975 } 976 977 if (workitem.type == WORKITEM_TYPE_EMPTY) { 978 hid_warn(hdev, 979 "unusable device of type %s (0x%02x) connected on slot %d", 980 device_type, 981 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE], 982 hidpp_report->device_index); 983 return; 984 } 985 986 hid_info(hdev, "device of type %s (0x%02x) connected on slot %d", 987 device_type, hidpp_report->params[HIDPP_PARAM_PROTO_TYPE], 988 hidpp_report->device_index); 989 990 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 991 schedule_work(&djrcv_dev->work); 992 } 993 994 static void logi_dj_recv_forward_null_report(struct dj_receiver_dev *djrcv_dev, 995 struct dj_report *dj_report) 996 { 997 /* We are called from atomic context (tasklet && djrcv->lock held) */ 998 unsigned int i; 999 u8 reportbuffer[MAX_REPORT_SIZE]; 1000 struct dj_device *djdev; 1001 1002 djdev = djrcv_dev->paired_dj_devices[dj_report->device_index]; 1003 1004 memset(reportbuffer, 0, sizeof(reportbuffer)); 1005 1006 for (i = 0; i < NUMBER_OF_HID_REPORTS; i++) { 1007 if (djdev->reports_supported & (1 << i)) { 1008 reportbuffer[0] = i; 1009 if (hid_input_report(djdev->hdev, 1010 HID_INPUT_REPORT, 1011 reportbuffer, 1012 hid_reportid_size_map[i], 1)) { 1013 dbg_hid("hid_input_report error sending null " 1014 "report\n"); 1015 } 1016 } 1017 } 1018 } 1019 1020 static void logi_dj_recv_forward_dj(struct dj_receiver_dev *djrcv_dev, 1021 struct dj_report *dj_report) 1022 { 1023 /* We are called from atomic context (tasklet && djrcv->lock held) */ 1024 struct dj_device *dj_device; 1025 1026 dj_device = djrcv_dev->paired_dj_devices[dj_report->device_index]; 1027 1028 if ((dj_report->report_type > ARRAY_SIZE(hid_reportid_size_map) - 1) || 1029 (hid_reportid_size_map[dj_report->report_type] == 0)) { 1030 dbg_hid("invalid report type:%x\n", dj_report->report_type); 1031 return; 1032 } 1033 1034 if (hid_input_report(dj_device->hdev, 1035 HID_INPUT_REPORT, &dj_report->report_type, 1036 hid_reportid_size_map[dj_report->report_type], 1)) { 1037 dbg_hid("hid_input_report error\n"); 1038 } 1039 } 1040 1041 static void logi_dj_recv_forward_report(struct dj_device *dj_dev, u8 *data, 1042 int size) 1043 { 1044 /* We are called from atomic context (tasklet && djrcv->lock held) */ 1045 if (hid_input_report(dj_dev->hdev, HID_INPUT_REPORT, data, size, 1)) 1046 dbg_hid("hid_input_report error\n"); 1047 } 1048 1049 static void logi_dj_recv_forward_input_report(struct hid_device *hdev, 1050 u8 *data, int size) 1051 { 1052 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1053 struct dj_device *dj_dev; 1054 unsigned long flags; 1055 u8 report = data[0]; 1056 int i; 1057 1058 if (report > REPORT_TYPE_RFREPORT_LAST) { 1059 hid_err(hdev, "Unexpected input report number %d\n", report); 1060 return; 1061 } 1062 1063 spin_lock_irqsave(&djrcv_dev->lock, flags); 1064 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { 1065 dj_dev = djrcv_dev->paired_dj_devices[i]; 1066 if (dj_dev && (dj_dev->reports_supported & BIT(report))) { 1067 logi_dj_recv_forward_report(dj_dev, data, size); 1068 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1069 return; 1070 } 1071 } 1072 1073 logi_dj_recv_queue_unknown_work(djrcv_dev); 1074 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1075 1076 dbg_hid("No dj-devs handling input report number %d\n", report); 1077 } 1078 1079 static int logi_dj_recv_send_report(struct dj_receiver_dev *djrcv_dev, 1080 struct dj_report *dj_report) 1081 { 1082 struct hid_device *hdev = djrcv_dev->hidpp; 1083 struct hid_report *report; 1084 struct hid_report_enum *output_report_enum; 1085 u8 *data = (u8 *)(&dj_report->device_index); 1086 unsigned int i; 1087 1088 output_report_enum = &hdev->report_enum[HID_OUTPUT_REPORT]; 1089 report = output_report_enum->report_id_hash[REPORT_ID_DJ_SHORT]; 1090 1091 if (!report) { 1092 hid_err(hdev, "%s: unable to find dj report\n", __func__); 1093 return -ENODEV; 1094 } 1095 1096 for (i = 0; i < DJREPORT_SHORT_LENGTH - 1; i++) 1097 report->field[0]->value[i] = data[i]; 1098 1099 hid_hw_request(hdev, report, HID_REQ_SET_REPORT); 1100 1101 return 0; 1102 } 1103 1104 static int logi_dj_recv_query_hidpp_devices(struct dj_receiver_dev *djrcv_dev) 1105 { 1106 const u8 template[] = {REPORT_ID_HIDPP_SHORT, 1107 HIDPP_RECEIVER_INDEX, 1108 HIDPP_SET_REGISTER, 1109 HIDPP_REG_CONNECTION_STATE, 1110 HIDPP_FAKE_DEVICE_ARRIVAL, 1111 0x00, 0x00}; 1112 u8 *hidpp_report; 1113 int retval; 1114 1115 hidpp_report = kmemdup(template, sizeof(template), GFP_KERNEL); 1116 if (!hidpp_report) 1117 return -ENOMEM; 1118 1119 retval = hid_hw_raw_request(djrcv_dev->hidpp, 1120 REPORT_ID_HIDPP_SHORT, 1121 hidpp_report, sizeof(template), 1122 HID_OUTPUT_REPORT, 1123 HID_REQ_SET_REPORT); 1124 1125 kfree(hidpp_report); 1126 return 0; 1127 } 1128 1129 static int logi_dj_recv_query_paired_devices(struct dj_receiver_dev *djrcv_dev) 1130 { 1131 struct dj_report *dj_report; 1132 int retval; 1133 1134 djrcv_dev->last_query = jiffies; 1135 1136 if (djrcv_dev->type != recvr_type_dj) 1137 return logi_dj_recv_query_hidpp_devices(djrcv_dev); 1138 1139 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); 1140 if (!dj_report) 1141 return -ENOMEM; 1142 dj_report->report_id = REPORT_ID_DJ_SHORT; 1143 dj_report->device_index = 0xFF; 1144 dj_report->report_type = REPORT_TYPE_CMD_GET_PAIRED_DEVICES; 1145 retval = logi_dj_recv_send_report(djrcv_dev, dj_report); 1146 kfree(dj_report); 1147 return retval; 1148 } 1149 1150 1151 static int logi_dj_recv_switch_to_dj_mode(struct dj_receiver_dev *djrcv_dev, 1152 unsigned timeout) 1153 { 1154 struct hid_device *hdev = djrcv_dev->hidpp; 1155 struct dj_report *dj_report; 1156 u8 *buf; 1157 int retval = 0; 1158 1159 dj_report = kzalloc(sizeof(struct dj_report), GFP_KERNEL); 1160 if (!dj_report) 1161 return -ENOMEM; 1162 1163 if (djrcv_dev->type == recvr_type_dj) { 1164 dj_report->report_id = REPORT_ID_DJ_SHORT; 1165 dj_report->device_index = 0xFF; 1166 dj_report->report_type = REPORT_TYPE_CMD_SWITCH; 1167 dj_report->report_params[CMD_SWITCH_PARAM_DEVBITFIELD] = 0x3F; 1168 dj_report->report_params[CMD_SWITCH_PARAM_TIMEOUT_SECONDS] = 1169 (u8)timeout; 1170 1171 retval = logi_dj_recv_send_report(djrcv_dev, dj_report); 1172 1173 /* 1174 * Ugly sleep to work around a USB 3.0 bug when the receiver is 1175 * still processing the "switch-to-dj" command while we send an 1176 * other command. 1177 * 50 msec should gives enough time to the receiver to be ready. 1178 */ 1179 msleep(50); 1180 } 1181 1182 /* 1183 * Magical bits to set up hidpp notifications when the dj devices 1184 * are connected/disconnected. 1185 * 1186 * We can reuse dj_report because HIDPP_REPORT_SHORT_LENGTH is smaller 1187 * than DJREPORT_SHORT_LENGTH. 1188 */ 1189 buf = (u8 *)dj_report; 1190 1191 memset(buf, 0, HIDPP_REPORT_SHORT_LENGTH); 1192 1193 buf[0] = REPORT_ID_HIDPP_SHORT; 1194 buf[1] = 0xFF; 1195 buf[2] = 0x80; 1196 buf[3] = 0x00; 1197 buf[4] = 0x00; 1198 buf[5] = 0x09; 1199 buf[6] = 0x00; 1200 1201 hid_hw_raw_request(hdev, REPORT_ID_HIDPP_SHORT, buf, 1202 HIDPP_REPORT_SHORT_LENGTH, HID_OUTPUT_REPORT, 1203 HID_REQ_SET_REPORT); 1204 1205 kfree(dj_report); 1206 return retval; 1207 } 1208 1209 1210 static int logi_dj_ll_open(struct hid_device *hid) 1211 { 1212 dbg_hid("%s: %s\n", __func__, hid->phys); 1213 return 0; 1214 1215 } 1216 1217 static void logi_dj_ll_close(struct hid_device *hid) 1218 { 1219 dbg_hid("%s: %s\n", __func__, hid->phys); 1220 } 1221 1222 /* 1223 * Register 0xB5 is "pairing information". It is solely intended for the 1224 * receiver, so do not overwrite the device index. 1225 */ 1226 static u8 unifying_pairing_query[] = { REPORT_ID_HIDPP_SHORT, 1227 HIDPP_RECEIVER_INDEX, 1228 HIDPP_GET_LONG_REGISTER, 1229 HIDPP_REG_PAIRING_INFORMATION }; 1230 static u8 unifying_pairing_answer[] = { REPORT_ID_HIDPP_LONG, 1231 HIDPP_RECEIVER_INDEX, 1232 HIDPP_GET_LONG_REGISTER, 1233 HIDPP_REG_PAIRING_INFORMATION }; 1234 1235 static int logi_dj_ll_raw_request(struct hid_device *hid, 1236 unsigned char reportnum, __u8 *buf, 1237 size_t count, unsigned char report_type, 1238 int reqtype) 1239 { 1240 struct dj_device *djdev = hid->driver_data; 1241 struct dj_receiver_dev *djrcv_dev = djdev->dj_receiver_dev; 1242 u8 *out_buf; 1243 int ret; 1244 1245 if ((buf[0] == REPORT_ID_HIDPP_SHORT) || 1246 (buf[0] == REPORT_ID_HIDPP_LONG) || 1247 (buf[0] == REPORT_ID_HIDPP_VERY_LONG)) { 1248 if (count < 2) 1249 return -EINVAL; 1250 1251 /* special case where we should not overwrite 1252 * the device_index */ 1253 if (count == 7 && !memcmp(buf, unifying_pairing_query, 1254 sizeof(unifying_pairing_query))) 1255 buf[4] = (buf[4] & 0xf0) | (djdev->device_index - 1); 1256 else 1257 buf[1] = djdev->device_index; 1258 return hid_hw_raw_request(djrcv_dev->hidpp, reportnum, buf, 1259 count, report_type, reqtype); 1260 } 1261 1262 if (buf[0] != REPORT_TYPE_LEDS) 1263 return -EINVAL; 1264 1265 if (djrcv_dev->type != recvr_type_dj && count >= 2) { 1266 if (!djrcv_dev->keyboard) { 1267 hid_warn(hid, "Received REPORT_TYPE_LEDS request before the keyboard interface was enumerated\n"); 1268 return 0; 1269 } 1270 /* usbhid overrides the report ID and ignores the first byte */ 1271 return hid_hw_raw_request(djrcv_dev->keyboard, 0, buf, count, 1272 report_type, reqtype); 1273 } 1274 1275 out_buf = kzalloc(DJREPORT_SHORT_LENGTH, GFP_ATOMIC); 1276 if (!out_buf) 1277 return -ENOMEM; 1278 1279 if (count > DJREPORT_SHORT_LENGTH - 2) 1280 count = DJREPORT_SHORT_LENGTH - 2; 1281 1282 out_buf[0] = REPORT_ID_DJ_SHORT; 1283 out_buf[1] = djdev->device_index; 1284 memcpy(out_buf + 2, buf, count); 1285 1286 ret = hid_hw_raw_request(djrcv_dev->hidpp, out_buf[0], out_buf, 1287 DJREPORT_SHORT_LENGTH, report_type, reqtype); 1288 1289 kfree(out_buf); 1290 return ret; 1291 } 1292 1293 static void rdcat(char *rdesc, unsigned int *rsize, const char *data, unsigned int size) 1294 { 1295 memcpy(rdesc + *rsize, data, size); 1296 *rsize += size; 1297 } 1298 1299 static int logi_dj_ll_parse(struct hid_device *hid) 1300 { 1301 struct dj_device *djdev = hid->driver_data; 1302 unsigned int rsize = 0; 1303 char *rdesc; 1304 int retval; 1305 1306 dbg_hid("%s\n", __func__); 1307 1308 djdev->hdev->version = 0x0111; 1309 djdev->hdev->country = 0x00; 1310 1311 rdesc = kmalloc(MAX_RDESC_SIZE, GFP_KERNEL); 1312 if (!rdesc) 1313 return -ENOMEM; 1314 1315 if (djdev->reports_supported & STD_KEYBOARD) { 1316 dbg_hid("%s: sending a kbd descriptor, reports_supported: %llx\n", 1317 __func__, djdev->reports_supported); 1318 rdcat(rdesc, &rsize, kbd_descriptor, sizeof(kbd_descriptor)); 1319 } 1320 1321 if (djdev->reports_supported & STD_MOUSE) { 1322 dbg_hid("%s: sending a mouse descriptor, reports_supported: %llx\n", 1323 __func__, djdev->reports_supported); 1324 if (djdev->dj_receiver_dev->type == recvr_type_gaming_hidpp || 1325 djdev->dj_receiver_dev->type == recvr_type_mouse_only) 1326 rdcat(rdesc, &rsize, mse_high_res_descriptor, 1327 sizeof(mse_high_res_descriptor)); 1328 else if (djdev->dj_receiver_dev->type == recvr_type_27mhz) 1329 rdcat(rdesc, &rsize, mse_27mhz_descriptor, 1330 sizeof(mse_27mhz_descriptor)); 1331 else if (djdev->dj_receiver_dev->type == recvr_type_bluetooth) 1332 rdcat(rdesc, &rsize, mse_bluetooth_descriptor, 1333 sizeof(mse_bluetooth_descriptor)); 1334 else 1335 rdcat(rdesc, &rsize, mse_descriptor, 1336 sizeof(mse_descriptor)); 1337 } 1338 1339 if (djdev->reports_supported & MULTIMEDIA) { 1340 dbg_hid("%s: sending a multimedia report descriptor: %llx\n", 1341 __func__, djdev->reports_supported); 1342 rdcat(rdesc, &rsize, consumer_descriptor, sizeof(consumer_descriptor)); 1343 } 1344 1345 if (djdev->reports_supported & POWER_KEYS) { 1346 dbg_hid("%s: sending a power keys report descriptor: %llx\n", 1347 __func__, djdev->reports_supported); 1348 rdcat(rdesc, &rsize, syscontrol_descriptor, sizeof(syscontrol_descriptor)); 1349 } 1350 1351 if (djdev->reports_supported & MEDIA_CENTER) { 1352 dbg_hid("%s: sending a media center report descriptor: %llx\n", 1353 __func__, djdev->reports_supported); 1354 rdcat(rdesc, &rsize, media_descriptor, sizeof(media_descriptor)); 1355 } 1356 1357 if (djdev->reports_supported & KBD_LEDS) { 1358 dbg_hid("%s: need to send kbd leds report descriptor: %llx\n", 1359 __func__, djdev->reports_supported); 1360 } 1361 1362 if (djdev->reports_supported & HIDPP) { 1363 rdcat(rdesc, &rsize, hidpp_descriptor, 1364 sizeof(hidpp_descriptor)); 1365 } 1366 1367 retval = hid_parse_report(hid, rdesc, rsize); 1368 kfree(rdesc); 1369 1370 return retval; 1371 } 1372 1373 static int logi_dj_ll_start(struct hid_device *hid) 1374 { 1375 dbg_hid("%s\n", __func__); 1376 return 0; 1377 } 1378 1379 static void logi_dj_ll_stop(struct hid_device *hid) 1380 { 1381 dbg_hid("%s\n", __func__); 1382 } 1383 1384 1385 static struct hid_ll_driver logi_dj_ll_driver = { 1386 .parse = logi_dj_ll_parse, 1387 .start = logi_dj_ll_start, 1388 .stop = logi_dj_ll_stop, 1389 .open = logi_dj_ll_open, 1390 .close = logi_dj_ll_close, 1391 .raw_request = logi_dj_ll_raw_request, 1392 }; 1393 1394 static int logi_dj_dj_event(struct hid_device *hdev, 1395 struct hid_report *report, u8 *data, 1396 int size) 1397 { 1398 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1399 struct dj_report *dj_report = (struct dj_report *) data; 1400 unsigned long flags; 1401 1402 /* 1403 * Here we receive all data coming from iface 2, there are 3 cases: 1404 * 1405 * 1) Data is intended for this driver i. e. data contains arrival, 1406 * departure, etc notifications, in which case we queue them for delayed 1407 * processing by the work queue. We return 1 to hid-core as no further 1408 * processing is required from it. 1409 * 1410 * 2) Data informs a connection change, if the change means rf link 1411 * loss, then we must send a null report to the upper layer to discard 1412 * potentially pressed keys that may be repeated forever by the input 1413 * layer. Return 1 to hid-core as no further processing is required. 1414 * 1415 * 3) Data is an actual input event from a paired DJ device in which 1416 * case we forward it to the correct hid device (via hid_input_report() 1417 * ) and return 1 so hid-core does not anything else with it. 1418 */ 1419 1420 if ((dj_report->device_index < DJ_DEVICE_INDEX_MIN) || 1421 (dj_report->device_index > DJ_DEVICE_INDEX_MAX)) { 1422 /* 1423 * Device index is wrong, bail out. 1424 * This driver can ignore safely the receiver notifications, 1425 * so ignore those reports too. 1426 */ 1427 if (dj_report->device_index != DJ_RECEIVER_INDEX) 1428 hid_err(hdev, "%s: invalid device index:%d\n", 1429 __func__, dj_report->device_index); 1430 return false; 1431 } 1432 1433 spin_lock_irqsave(&djrcv_dev->lock, flags); 1434 1435 if (!djrcv_dev->paired_dj_devices[dj_report->device_index]) { 1436 /* received an event for an unknown device, bail out */ 1437 logi_dj_recv_queue_notification(djrcv_dev, dj_report); 1438 goto out; 1439 } 1440 1441 switch (dj_report->report_type) { 1442 case REPORT_TYPE_NOTIF_DEVICE_PAIRED: 1443 /* pairing notifications are handled above the switch */ 1444 break; 1445 case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED: 1446 logi_dj_recv_queue_notification(djrcv_dev, dj_report); 1447 break; 1448 case REPORT_TYPE_NOTIF_CONNECTION_STATUS: 1449 if (dj_report->report_params[CONNECTION_STATUS_PARAM_STATUS] == 1450 STATUS_LINKLOSS) { 1451 logi_dj_recv_forward_null_report(djrcv_dev, dj_report); 1452 } 1453 break; 1454 default: 1455 logi_dj_recv_forward_dj(djrcv_dev, dj_report); 1456 } 1457 1458 out: 1459 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1460 1461 return true; 1462 } 1463 1464 static int logi_dj_hidpp_event(struct hid_device *hdev, 1465 struct hid_report *report, u8 *data, 1466 int size) 1467 { 1468 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1469 struct hidpp_event *hidpp_report = (struct hidpp_event *) data; 1470 struct dj_device *dj_dev; 1471 unsigned long flags; 1472 u8 device_index = hidpp_report->device_index; 1473 1474 if (device_index == HIDPP_RECEIVER_INDEX) { 1475 /* special case were the device wants to know its unifying 1476 * name */ 1477 if (size == HIDPP_REPORT_LONG_LENGTH && 1478 !memcmp(data, unifying_pairing_answer, 1479 sizeof(unifying_pairing_answer))) 1480 device_index = (data[4] & 0x0F) + 1; 1481 else 1482 return false; 1483 } 1484 1485 /* 1486 * Data is from the HID++ collection, in this case, we forward the 1487 * data to the corresponding child dj device and return 0 to hid-core 1488 * so he data also goes to the hidraw device of the receiver. This 1489 * allows a user space application to implement the full HID++ routing 1490 * via the receiver. 1491 */ 1492 1493 if ((device_index < DJ_DEVICE_INDEX_MIN) || 1494 (device_index > DJ_DEVICE_INDEX_MAX)) { 1495 /* 1496 * Device index is wrong, bail out. 1497 * This driver can ignore safely the receiver notifications, 1498 * so ignore those reports too. 1499 */ 1500 hid_err(hdev, "%s: invalid device index:%d\n", __func__, 1501 hidpp_report->device_index); 1502 return false; 1503 } 1504 1505 spin_lock_irqsave(&djrcv_dev->lock, flags); 1506 1507 dj_dev = djrcv_dev->paired_dj_devices[device_index]; 1508 1509 /* 1510 * With 27 MHz receivers, we do not get an explicit unpair event, 1511 * remove the old device if the user has paired a *different* device. 1512 */ 1513 if (djrcv_dev->type == recvr_type_27mhz && dj_dev && 1514 hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED && 1515 hidpp_report->params[HIDPP_PARAM_PROTO_TYPE] == 0x02 && 1516 hidpp_report->params[HIDPP_PARAM_27MHZ_DEVID] != 1517 dj_dev->hdev->product) { 1518 struct dj_workitem workitem = { 1519 .device_index = hidpp_report->device_index, 1520 .type = WORKITEM_TYPE_UNPAIRED, 1521 }; 1522 kfifo_in(&djrcv_dev->notif_fifo, &workitem, sizeof(workitem)); 1523 /* logi_hidpp_recv_queue_notif will queue the work */ 1524 dj_dev = NULL; 1525 } 1526 1527 if (dj_dev) { 1528 logi_dj_recv_forward_report(dj_dev, data, size); 1529 } else { 1530 if (hidpp_report->sub_id == REPORT_TYPE_NOTIF_DEVICE_CONNECTED) 1531 logi_hidpp_recv_queue_notif(hdev, hidpp_report); 1532 else 1533 logi_dj_recv_queue_unknown_work(djrcv_dev); 1534 } 1535 1536 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1537 1538 return false; 1539 } 1540 1541 static int logi_dj_raw_event(struct hid_device *hdev, 1542 struct hid_report *report, u8 *data, 1543 int size) 1544 { 1545 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1546 dbg_hid("%s, size:%d\n", __func__, size); 1547 1548 if (!djrcv_dev) 1549 return 0; 1550 1551 if (!hdev->report_enum[HID_INPUT_REPORT].numbered) { 1552 1553 if (djrcv_dev->unnumbered_application == HID_GD_KEYBOARD) { 1554 /* 1555 * For the keyboard, we can reuse the same report by 1556 * using the second byte which is constant in the USB 1557 * HID report descriptor. 1558 */ 1559 data[1] = data[0]; 1560 data[0] = REPORT_TYPE_KEYBOARD; 1561 1562 logi_dj_recv_forward_input_report(hdev, data, size); 1563 1564 /* restore previous state */ 1565 data[0] = data[1]; 1566 data[1] = 0; 1567 } 1568 /* 1569 * Mouse-only receivers send unnumbered mouse data. The 27 MHz 1570 * receiver uses 6 byte packets, the nano receiver 8 bytes. 1571 */ 1572 if (djrcv_dev->unnumbered_application == HID_GD_MOUSE && 1573 size <= 8) { 1574 u8 mouse_report[9]; 1575 1576 /* Prepend report id */ 1577 mouse_report[0] = REPORT_TYPE_MOUSE; 1578 memcpy(mouse_report + 1, data, size); 1579 logi_dj_recv_forward_input_report(hdev, mouse_report, 1580 size + 1); 1581 } 1582 1583 return false; 1584 } 1585 1586 switch (data[0]) { 1587 case REPORT_ID_DJ_SHORT: 1588 if (size != DJREPORT_SHORT_LENGTH) { 1589 hid_err(hdev, "Short DJ report bad size (%d)", size); 1590 return false; 1591 } 1592 return logi_dj_dj_event(hdev, report, data, size); 1593 case REPORT_ID_DJ_LONG: 1594 if (size != DJREPORT_LONG_LENGTH) { 1595 hid_err(hdev, "Long DJ report bad size (%d)", size); 1596 return false; 1597 } 1598 return logi_dj_dj_event(hdev, report, data, size); 1599 case REPORT_ID_HIDPP_SHORT: 1600 if (size != HIDPP_REPORT_SHORT_LENGTH) { 1601 hid_err(hdev, "Short HID++ report bad size (%d)", size); 1602 return false; 1603 } 1604 return logi_dj_hidpp_event(hdev, report, data, size); 1605 case REPORT_ID_HIDPP_LONG: 1606 if (size != HIDPP_REPORT_LONG_LENGTH) { 1607 hid_err(hdev, "Long HID++ report bad size (%d)", size); 1608 return false; 1609 } 1610 return logi_dj_hidpp_event(hdev, report, data, size); 1611 } 1612 1613 logi_dj_recv_forward_input_report(hdev, data, size); 1614 1615 return false; 1616 } 1617 1618 static int logi_dj_probe(struct hid_device *hdev, 1619 const struct hid_device_id *id) 1620 { 1621 struct hid_report_enum *rep_enum; 1622 struct hid_report *rep; 1623 struct dj_receiver_dev *djrcv_dev; 1624 struct usb_interface *intf; 1625 unsigned int no_dj_interfaces = 0; 1626 bool has_hidpp = false; 1627 unsigned long flags; 1628 int retval; 1629 1630 /* 1631 * Call to usbhid to fetch the HID descriptors of the current 1632 * interface subsequently call to the hid/hid-core to parse the 1633 * fetched descriptors. 1634 */ 1635 retval = hid_parse(hdev); 1636 if (retval) { 1637 hid_err(hdev, "%s: parse failed\n", __func__); 1638 return retval; 1639 } 1640 1641 /* 1642 * Some KVMs add an extra interface for e.g. mouse emulation. If we 1643 * treat these as logitech-dj interfaces then this causes input events 1644 * reported through this extra interface to not be reported correctly. 1645 * To avoid this, we treat these as generic-hid devices. 1646 */ 1647 switch (id->driver_data) { 1648 case recvr_type_dj: no_dj_interfaces = 3; break; 1649 case recvr_type_hidpp: no_dj_interfaces = 2; break; 1650 case recvr_type_gaming_hidpp: no_dj_interfaces = 3; break; 1651 case recvr_type_mouse_only: no_dj_interfaces = 2; break; 1652 case recvr_type_27mhz: no_dj_interfaces = 2; break; 1653 case recvr_type_bluetooth: no_dj_interfaces = 2; break; 1654 } 1655 if (hid_is_using_ll_driver(hdev, &usb_hid_driver)) { 1656 intf = to_usb_interface(hdev->dev.parent); 1657 if (intf && intf->altsetting->desc.bInterfaceNumber >= 1658 no_dj_interfaces) { 1659 hdev->quirks |= HID_QUIRK_INPUT_PER_APP; 1660 return hid_hw_start(hdev, HID_CONNECT_DEFAULT); 1661 } 1662 } 1663 1664 rep_enum = &hdev->report_enum[HID_INPUT_REPORT]; 1665 1666 /* no input reports, bail out */ 1667 if (list_empty(&rep_enum->report_list)) 1668 return -ENODEV; 1669 1670 /* 1671 * Check for the HID++ application. 1672 * Note: we should theoretically check for HID++ and DJ 1673 * collections, but this will do. 1674 */ 1675 list_for_each_entry(rep, &rep_enum->report_list, list) { 1676 if (rep->application == 0xff000001) 1677 has_hidpp = true; 1678 } 1679 1680 /* 1681 * Ignore interfaces without DJ/HID++ collection, they will not carry 1682 * any data, dont create any hid_device for them. 1683 */ 1684 if (!has_hidpp && id->driver_data == recvr_type_dj) 1685 return -ENODEV; 1686 1687 /* get the current application attached to the node */ 1688 rep = list_first_entry(&rep_enum->report_list, struct hid_report, list); 1689 djrcv_dev = dj_get_receiver_dev(hdev, id->driver_data, 1690 rep->application, has_hidpp); 1691 if (!djrcv_dev) { 1692 hid_err(hdev, "%s: dj_get_receiver_dev failed\n", __func__); 1693 return -ENOMEM; 1694 } 1695 1696 if (!rep_enum->numbered) 1697 djrcv_dev->unnumbered_application = rep->application; 1698 1699 /* Starts the usb device and connects to upper interfaces hiddev and 1700 * hidraw */ 1701 retval = hid_hw_start(hdev, HID_CONNECT_HIDRAW|HID_CONNECT_HIDDEV); 1702 if (retval) { 1703 hid_err(hdev, "%s: hid_hw_start returned error\n", __func__); 1704 goto hid_hw_start_fail; 1705 } 1706 1707 if (has_hidpp) { 1708 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); 1709 if (retval < 0) { 1710 hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n", 1711 __func__, retval); 1712 goto switch_to_dj_mode_fail; 1713 } 1714 } 1715 1716 /* This is enabling the polling urb on the IN endpoint */ 1717 retval = hid_hw_open(hdev); 1718 if (retval < 0) { 1719 hid_err(hdev, "%s: hid_hw_open returned error:%d\n", 1720 __func__, retval); 1721 goto llopen_failed; 1722 } 1723 1724 /* Allow incoming packets to arrive: */ 1725 hid_device_io_start(hdev); 1726 1727 if (has_hidpp) { 1728 spin_lock_irqsave(&djrcv_dev->lock, flags); 1729 djrcv_dev->ready = true; 1730 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1731 retval = logi_dj_recv_query_paired_devices(djrcv_dev); 1732 if (retval < 0) { 1733 hid_err(hdev, "%s: logi_dj_recv_query_paired_devices error:%d\n", 1734 __func__, retval); 1735 goto logi_dj_recv_query_paired_devices_failed; 1736 } 1737 } 1738 1739 return retval; 1740 1741 logi_dj_recv_query_paired_devices_failed: 1742 hid_hw_close(hdev); 1743 1744 llopen_failed: 1745 switch_to_dj_mode_fail: 1746 hid_hw_stop(hdev); 1747 1748 hid_hw_start_fail: 1749 dj_put_receiver_dev(hdev); 1750 return retval; 1751 } 1752 1753 #ifdef CONFIG_PM 1754 static int logi_dj_reset_resume(struct hid_device *hdev) 1755 { 1756 int retval; 1757 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1758 1759 if (!djrcv_dev || djrcv_dev->hidpp != hdev) 1760 return 0; 1761 1762 retval = logi_dj_recv_switch_to_dj_mode(djrcv_dev, 0); 1763 if (retval < 0) { 1764 hid_err(hdev, "%s: logi_dj_recv_switch_to_dj_mode returned error:%d\n", 1765 __func__, retval); 1766 } 1767 1768 return 0; 1769 } 1770 #endif 1771 1772 static void logi_dj_remove(struct hid_device *hdev) 1773 { 1774 struct dj_receiver_dev *djrcv_dev = hid_get_drvdata(hdev); 1775 struct dj_device *dj_dev; 1776 unsigned long flags; 1777 int i; 1778 1779 dbg_hid("%s\n", __func__); 1780 1781 if (!djrcv_dev) 1782 return hid_hw_stop(hdev); 1783 1784 /* 1785 * This ensures that if the work gets requeued from another 1786 * interface of the same receiver it will be a no-op. 1787 */ 1788 spin_lock_irqsave(&djrcv_dev->lock, flags); 1789 djrcv_dev->ready = false; 1790 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1791 1792 cancel_work_sync(&djrcv_dev->work); 1793 1794 hid_hw_close(hdev); 1795 hid_hw_stop(hdev); 1796 1797 /* 1798 * For proper operation we need access to all interfaces, so we destroy 1799 * the paired devices when we're unbound from any interface. 1800 * 1801 * Note we may still be bound to other interfaces, sharing the same 1802 * djrcv_dev, so we need locking here. 1803 */ 1804 for (i = 0; i < (DJ_MAX_PAIRED_DEVICES + DJ_DEVICE_INDEX_MIN); i++) { 1805 spin_lock_irqsave(&djrcv_dev->lock, flags); 1806 dj_dev = djrcv_dev->paired_dj_devices[i]; 1807 djrcv_dev->paired_dj_devices[i] = NULL; 1808 spin_unlock_irqrestore(&djrcv_dev->lock, flags); 1809 if (dj_dev != NULL) { 1810 hid_destroy_device(dj_dev->hdev); 1811 kfree(dj_dev); 1812 } 1813 } 1814 1815 dj_put_receiver_dev(hdev); 1816 } 1817 1818 static const struct hid_device_id logi_dj_receivers[] = { 1819 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1820 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER), 1821 .driver_data = recvr_type_dj}, 1822 {HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1823 USB_DEVICE_ID_LOGITECH_UNIFYING_RECEIVER_2), 1824 .driver_data = recvr_type_dj}, 1825 { /* Logitech Nano mouse only receiver */ 1826 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1827 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER), 1828 .driver_data = recvr_type_mouse_only}, 1829 { /* Logitech Nano (non DJ) receiver */ 1830 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1831 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_2), 1832 .driver_data = recvr_type_hidpp}, 1833 { /* Logitech gaming receiver (0xc539) */ 1834 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1835 USB_DEVICE_ID_LOGITECH_NANO_RECEIVER_GAMING), 1836 .driver_data = recvr_type_gaming_hidpp}, 1837 { /* Logitech 27 MHz HID++ 1.0 receiver (0xc517) */ 1838 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1839 USB_DEVICE_ID_S510_RECEIVER_2), 1840 .driver_data = recvr_type_27mhz}, 1841 { /* Logitech 27 MHz HID++ 1.0 mouse-only receiver (0xc51b) */ 1842 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1843 USB_DEVICE_ID_LOGITECH_27MHZ_MOUSE_RECEIVER), 1844 .driver_data = recvr_type_27mhz}, 1845 { /* Logitech MX5000 HID++ / bluetooth receiver keyboard intf. */ 1846 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1847 0xc70e), 1848 .driver_data = recvr_type_bluetooth}, 1849 { /* Logitech MX5000 HID++ / bluetooth receiver mouse intf. */ 1850 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1851 0xc70a), 1852 .driver_data = recvr_type_bluetooth}, 1853 { /* Logitech MX5500 HID++ / bluetooth receiver keyboard intf. */ 1854 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1855 0xc71b), 1856 .driver_data = recvr_type_bluetooth}, 1857 { /* Logitech MX5500 HID++ / bluetooth receiver mouse intf. */ 1858 HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 1859 0xc71c), 1860 .driver_data = recvr_type_bluetooth}, 1861 {} 1862 }; 1863 1864 MODULE_DEVICE_TABLE(hid, logi_dj_receivers); 1865 1866 static struct hid_driver logi_djreceiver_driver = { 1867 .name = "logitech-djreceiver", 1868 .id_table = logi_dj_receivers, 1869 .probe = logi_dj_probe, 1870 .remove = logi_dj_remove, 1871 .raw_event = logi_dj_raw_event, 1872 #ifdef CONFIG_PM 1873 .reset_resume = logi_dj_reset_resume, 1874 #endif 1875 }; 1876 1877 module_hid_driver(logi_djreceiver_driver); 1878 1879 MODULE_LICENSE("GPL"); 1880 MODULE_AUTHOR("Logitech"); 1881 MODULE_AUTHOR("Nestor Lopez Casado"); 1882 MODULE_AUTHOR("nlopezcasad@logitech.com"); 1883