drivers/hid/hid-logitech-hidpp.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  HIDPP protocol for Logitech Unifying receivers
   4  *
   5  *  Copyright (c) 2011 Logitech (c)
   6  *  Copyright (c) 2012-2013 Google (c)
   7  *  Copyright (c) 2013-2014 Red Hat Inc.
   8  */
   9
  10
  11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  12
  13 #include <linux/device.h>
  14 #include <linux/input.h>
  15 #include <linux/usb.h>
  16 #include <linux/hid.h>
  17 #include <linux/module.h>
  18 #include <linux/slab.h>
  19 #include <linux/sched.h>
  20 #include <linux/sched/clock.h>
  21 #include <linux/kfifo.h>
  22 #include <linux/input/mt.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/atomic.h>
  25 #include <linux/fixp-arith.h>
  26 #include <asm/unaligned.h>
  27 #include "usbhid/usbhid.h"
  28 #include "hid-ids.h"
  29
  30 MODULE_LICENSE("GPL");
  31 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  32 MODULE_AUTHOR("Nestor Lopez Casado <nlopezcasad@logitech.com>");
  33
  34 static bool disable_raw_mode;
  35 module_param(disable_raw_mode, bool, 0644);
  36 MODULE_PARM_DESC(disable_raw_mode,
  37         "Disable Raw mode reporting for touchpads and keep firmware gestures.");
  38
  39 static bool disable_tap_to_click;
  40 module_param(disable_tap_to_click, bool, 0644);
  41 MODULE_PARM_DESC(disable_tap_to_click,
  42         "Disable Tap-To-Click mode reporting for touchpads (only on the K400 currently).");
  43
  44 #define REPORT_ID_HIDPP_SHORT                   0x10
  45 #define REPORT_ID_HIDPP_LONG                    0x11
  46 #define REPORT_ID_HIDPP_VERY_LONG               0x12
  47
  48 #define HIDPP_REPORT_SHORT_LENGTH               7
  49 #define HIDPP_REPORT_LONG_LENGTH                20
  50 #define HIDPP_REPORT_VERY_LONG_MAX_LENGTH       64
  51
  52 #define HIDPP_SUB_ID_CONSUMER_VENDOR_KEYS       0x03
  53 #define HIDPP_SUB_ID_ROLLER                     0x05
  54 #define HIDPP_SUB_ID_MOUSE_EXTRA_BTNS           0x06
  55
  56 #define HIDPP_QUIRK_CLASS_WTP                   BIT(0)
  57 #define HIDPP_QUIRK_CLASS_M560                  BIT(1)
  58 #define HIDPP_QUIRK_CLASS_K400                  BIT(2)
  59 #define HIDPP_QUIRK_CLASS_G920                  BIT(3)
  60 #define HIDPP_QUIRK_CLASS_K750                  BIT(4)
  61
  62 /* bits 2..20 are reserved for classes */
  63 /* #define HIDPP_QUIRK_CONNECT_EVENTS           BIT(21) disabled */
  64 #define HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS        BIT(22)
  65 #define HIDPP_QUIRK_NO_HIDINPUT                 BIT(23)
  66 #define HIDPP_QUIRK_FORCE_OUTPUT_REPORTS        BIT(24)
  67 #define HIDPP_QUIRK_UNIFYING                    BIT(25)
  68 #define HIDPP_QUIRK_HI_RES_SCROLL_1P0           BIT(26)
  69 #define HIDPP_QUIRK_HI_RES_SCROLL_X2120         BIT(27)
  70 #define HIDPP_QUIRK_HI_RES_SCROLL_X2121         BIT(28)
  71 #define HIDPP_QUIRK_HIDPP_WHEELS                BIT(29)
  72 #define HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS      BIT(30)
  73 #define HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS  BIT(31)
  74
  75 /* These are just aliases for now */
  76 #define HIDPP_QUIRK_KBD_SCROLL_WHEEL HIDPP_QUIRK_HIDPP_WHEELS
  77 #define HIDPP_QUIRK_KBD_ZOOM_WHEEL   HIDPP_QUIRK_HIDPP_WHEELS
  78
  79 /* Convenience constant to check for any high-res support. */
  80 #define HIDPP_QUIRK_HI_RES_SCROLL       (HIDPP_QUIRK_HI_RES_SCROLL_1P0 | \
  81                                          HIDPP_QUIRK_HI_RES_SCROLL_X2120 | \
  82                                          HIDPP_QUIRK_HI_RES_SCROLL_X2121)
  83
  84 #define HIDPP_QUIRK_DELAYED_INIT                HIDPP_QUIRK_NO_HIDINPUT
  85
  86 #define HIDPP_CAPABILITY_HIDPP10_BATTERY        BIT(0)
  87 #define HIDPP_CAPABILITY_HIDPP20_BATTERY        BIT(1)
  88 #define HIDPP_CAPABILITY_BATTERY_MILEAGE        BIT(2)
  89 #define HIDPP_CAPABILITY_BATTERY_LEVEL_STATUS   BIT(3)
  90
  91 /*
  92  * There are two hidpp protocols in use, the first version hidpp10 is known
  93  * as register access protocol or RAP, the second version hidpp20 is known as
  94  * feature access protocol or FAP
  95  *
  96  * Most older devices (including the Unifying usb receiver) use the RAP protocol
  97  * where as most newer devices use the FAP protocol. Both protocols are
  98  * compatible with the underlying transport, which could be usb, Unifiying, or
  99  * bluetooth. The message lengths are defined by the hid vendor specific report
 100  * descriptor for the HIDPP_SHORT report type (total message lenth 7 bytes) and
 101  * the HIDPP_LONG report type (total message length 20 bytes)
 102  *
 103  * The RAP protocol uses both report types, whereas the FAP only uses HIDPP_LONG
 104  * messages. The Unifying receiver itself responds to RAP messages (device index
 105  * is 0xFF for the receiver), and all messages (short or long) with a device
 106  * index between 1 and 6 are passed untouched to the corresponding paired
 107  * Unifying device.
 108  *
 109  * The paired device can be RAP or FAP, it will receive the message untouched
 110  * from the Unifiying receiver.
 111  */
 112
 113 struct fap {
 114         u8 feature_index;
 115         u8 funcindex_clientid;
 116         u8 params[HIDPP_REPORT_VERY_LONG_MAX_LENGTH - 4U];
 117 };
 118
 119 struct rap {
 120         u8 sub_id;
 121         u8 reg_address;
 122         u8 params[HIDPP_REPORT_VERY_LONG_MAX_LENGTH - 4U];
 123 };
 124
 125 struct hidpp_report {
 126         u8 report_id;
 127         u8 device_index;
 128         union {
 129                 struct fap fap;
 130                 struct rap rap;
 131                 u8 rawbytes[sizeof(struct fap)];
 132         };
 133 } __packed;
 134
 135 struct hidpp_battery {
 136         u8 feature_index;
 137         u8 solar_feature_index;
 138         struct power_supply_desc desc;
 139         struct power_supply *ps;
 140         char name[64];
 141         int status;
 142         int capacity;
 143         int level;
 144         bool online;
 145 };
 146
 147 /**
 148  * struct hidpp_scroll_counter - Utility class for processing high-resolution
 149  *                             scroll events.
 150  * @dev: the input device for which events should be reported.
 151  * @wheel_multiplier: the scalar multiplier to be applied to each wheel event
 152  * @remainder: counts the number of high-resolution units moved since the last
 153  *             low-resolution event (REL_WHEEL or REL_HWHEEL) was sent. Should
 154  *             only be used by class methods.
 155  * @direction: direction of last movement (1 or -1)
 156  * @last_time: last event time, used to reset remainder after inactivity
 157  */
 158 struct hidpp_scroll_counter {
 159         int wheel_multiplier;
 160         int remainder;
 161         int direction;
 162         unsigned long long last_time;
 163 };
 164
 165 struct hidpp_device {
 166         struct hid_device *hid_dev;
 167         struct input_dev *input;
 168         struct mutex send_mutex;
 169         void *send_receive_buf;
 170         char *name;             /* will never be NULL and should not be freed */
 171         wait_queue_head_t wait;
 172         int very_long_report_length;
 173         bool answer_available;
 174         u8 protocol_major;
 175         u8 protocol_minor;
 176
 177         void *private_data;
 178
 179         struct work_struct work;
 180         struct kfifo delayed_work_fifo;
 181         atomic_t connected;
 182         struct input_dev *delayed_input;
 183
 184         unsigned long quirks;
 185         unsigned long capabilities;
 186
 187         struct hidpp_battery battery;
 188         struct hidpp_scroll_counter vertical_wheel_counter;
 189 };
 190
 191 /* HID++ 1.0 error codes */
 192 #define HIDPP_ERROR                             0x8f
 193 #define HIDPP_ERROR_SUCCESS                     0x00
 194 #define HIDPP_ERROR_INVALID_SUBID               0x01
 195 #define HIDPP_ERROR_INVALID_ADRESS              0x02
 196 #define HIDPP_ERROR_INVALID_VALUE               0x03
 197 #define HIDPP_ERROR_CONNECT_FAIL                0x04
 198 #define HIDPP_ERROR_TOO_MANY_DEVICES            0x05
 199 #define HIDPP_ERROR_ALREADY_EXISTS              0x06
 200 #define HIDPP_ERROR_BUSY                        0x07
 201 #define HIDPP_ERROR_UNKNOWN_DEVICE              0x08
 202 #define HIDPP_ERROR_RESOURCE_ERROR              0x09
 203 #define HIDPP_ERROR_REQUEST_UNAVAILABLE         0x0a
 204 #define HIDPP_ERROR_INVALID_PARAM_VALUE         0x0b
 205 #define HIDPP_ERROR_WRONG_PIN_CODE              0x0c
 206 /* HID++ 2.0 error codes */
 207 #define HIDPP20_ERROR                           0xff
 208
 209 static void hidpp_connect_event(struct hidpp_device *hidpp_dev);
 210
 211 static int __hidpp_send_report(struct hid_device *hdev,
 212                                 struct hidpp_report *hidpp_report)
 213 {
 214         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 215         int fields_count, ret;
 216
 217         switch (hidpp_report->report_id) {
 218         case REPORT_ID_HIDPP_SHORT:
 219                 fields_count = HIDPP_REPORT_SHORT_LENGTH;
 220                 break;
 221         case REPORT_ID_HIDPP_LONG:
 222                 fields_count = HIDPP_REPORT_LONG_LENGTH;
 223                 break;
 224         case REPORT_ID_HIDPP_VERY_LONG:
 225                 fields_count = hidpp->very_long_report_length;
 226                 break;
 227         default:
 228                 return -ENODEV;
 229         }
 230
 231         /*
 232          * set the device_index as the receiver, it will be overwritten by
 233          * hid_hw_request if needed
 234          */
 235         hidpp_report->device_index = 0xff;
 236
 237         if (hidpp->quirks & HIDPP_QUIRK_FORCE_OUTPUT_REPORTS) {
 238                 ret = hid_hw_output_report(hdev, (u8 *)hidpp_report, fields_count);
 239         } else {
 240                 ret = hid_hw_raw_request(hdev, hidpp_report->report_id,
 241                         (u8 *)hidpp_report, fields_count, HID_OUTPUT_REPORT,
 242                         HID_REQ_SET_REPORT);
 243         }
 244
 245         return ret == fields_count ? 0 : -1;
 246 }
 247
 248 /**
 249  * hidpp_send_message_sync() returns 0 in case of success, and something else
 250  * in case of a failure.
 251  * - If ' something else' is positive, that means that an error has been raised
 252  *   by the protocol itself.
 253  * - If ' something else' is negative, that means that we had a classic error
 254  *   (-ENOMEM, -EPIPE, etc...)
 255  */
 256 static int hidpp_send_message_sync(struct hidpp_device *hidpp,
 257         struct hidpp_report *message,
 258         struct hidpp_report *response)
 259 {
 260         int ret;
 261
 262         mutex_lock(&hidpp->send_mutex);
 263
 264         hidpp->send_receive_buf = response;
 265         hidpp->answer_available = false;
 266
 267         /*
 268          * So that we can later validate the answer when it arrives
 269          * in hidpp_raw_event
 270          */
 271         *response = *message;
 272
 273         ret = __hidpp_send_report(hidpp->hid_dev, message);
 274
 275         if (ret) {
 276                 dbg_hid("__hidpp_send_report returned err: %d\n", ret);
 277                 memset(response, 0, sizeof(struct hidpp_report));
 278                 goto exit;
 279         }
 280
 281         if (!wait_event_timeout(hidpp->wait, hidpp->answer_available,
 282                                 5*HZ)) {
 283                 dbg_hid("%s:timeout waiting for response\n", __func__);
 284                 memset(response, 0, sizeof(struct hidpp_report));
 285                 ret = -ETIMEDOUT;
 286         }
 287
 288         if (response->report_id == REPORT_ID_HIDPP_SHORT &&
 289             response->rap.sub_id == HIDPP_ERROR) {
 290                 ret = response->rap.params[1];
 291                 dbg_hid("%s:got hidpp error %02X\n", __func__, ret);
 292                 goto exit;
 293         }
 294
 295         if ((response->report_id == REPORT_ID_HIDPP_LONG ||
 296                         response->report_id == REPORT_ID_HIDPP_VERY_LONG) &&
 297                         response->fap.feature_index == HIDPP20_ERROR) {
 298                 ret = response->fap.params[1];
 299                 dbg_hid("%s:got hidpp 2.0 error %02X\n", __func__, ret);
 300                 goto exit;
 301         }
 302
 303 exit:
 304         mutex_unlock(&hidpp->send_mutex);
 305         return ret;
 306
 307 }
 308
 309 static int hidpp_send_fap_command_sync(struct hidpp_device *hidpp,
 310         u8 feat_index, u8 funcindex_clientid, u8 *params, int param_count,
 311         struct hidpp_report *response)
 312 {
 313         struct hidpp_report *message;
 314         int ret;
 315
 316         if (param_count > sizeof(message->fap.params))
 317                 return -EINVAL;
 318
 319         message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
 320         if (!message)
 321                 return -ENOMEM;
 322
 323         if (param_count > (HIDPP_REPORT_LONG_LENGTH - 4))
 324                 message->report_id = REPORT_ID_HIDPP_VERY_LONG;
 325         else
 326                 message->report_id = REPORT_ID_HIDPP_LONG;
 327         message->fap.feature_index = feat_index;
 328         message->fap.funcindex_clientid = funcindex_clientid;
 329         memcpy(&message->fap.params, params, param_count);
 330
 331         ret = hidpp_send_message_sync(hidpp, message, response);
 332         kfree(message);
 333         return ret;
 334 }
 335
 336 static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
 337         u8 report_id, u8 sub_id, u8 reg_address, u8 *params, int param_count,
 338         struct hidpp_report *response)
 339 {
 340         struct hidpp_report *message;
 341         int ret, max_count;
 342
 343         switch (report_id) {
 344         case REPORT_ID_HIDPP_SHORT:
 345                 max_count = HIDPP_REPORT_SHORT_LENGTH - 4;
 346                 break;
 347         case REPORT_ID_HIDPP_LONG:
 348                 max_count = HIDPP_REPORT_LONG_LENGTH - 4;
 349                 break;
 350         case REPORT_ID_HIDPP_VERY_LONG:
 351                 max_count = hidpp_dev->very_long_report_length - 4;
 352                 break;
 353         default:
 354                 return -EINVAL;
 355         }
 356
 357         if (param_count > max_count)
 358                 return -EINVAL;
 359
 360         message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
 361         if (!message)
 362                 return -ENOMEM;
 363         message->report_id = report_id;
 364         message->rap.sub_id = sub_id;
 365         message->rap.reg_address = reg_address;
 366         memcpy(&message->rap.params, params, param_count);
 367
 368         ret = hidpp_send_message_sync(hidpp_dev, message, response);
 369         kfree(message);
 370         return ret;
 371 }
 372
 373 static void delayed_work_cb(struct work_struct *work)
 374 {
 375         struct hidpp_device *hidpp = container_of(work, struct hidpp_device,
 376                                                         work);
 377         hidpp_connect_event(hidpp);
 378 }
 379
 380 static inline bool hidpp_match_answer(struct hidpp_report *question,
 381                 struct hidpp_report *answer)
 382 {
 383         return (answer->fap.feature_index == question->fap.feature_index) &&
 384            (answer->fap.funcindex_clientid == question->fap.funcindex_clientid);
 385 }
 386
 387 static inline bool hidpp_match_error(struct hidpp_report *question,
 388                 struct hidpp_report *answer)
 389 {
 390         return ((answer->rap.sub_id == HIDPP_ERROR) ||
 391             (answer->fap.feature_index == HIDPP20_ERROR)) &&
 392             (answer->fap.funcindex_clientid == question->fap.feature_index) &&
 393             (answer->fap.params[0] == question->fap.funcindex_clientid);
 394 }
 395
 396 static inline bool hidpp_report_is_connect_event(struct hidpp_report *report)
 397 {
 398         return (report->report_id == REPORT_ID_HIDPP_SHORT) &&
 399                 (report->rap.sub_id == 0x41);
 400 }
 401
 402 /**
 403  * hidpp_prefix_name() prefixes the current given name with "Logitech ".
 404  */
 405 static void hidpp_prefix_name(char **name, int name_length)
 406 {
 407 #define PREFIX_LENGTH 9 /* "Logitech " */
 408
 409         int new_length;
 410         char *new_name;
 411
 412         if (name_length > PREFIX_LENGTH &&
 413             strncmp(*name, "Logitech ", PREFIX_LENGTH) == 0)
 414                 /* The prefix has is already in the name */
 415                 return;
 416
 417         new_length = PREFIX_LENGTH + name_length;
 418         new_name = kzalloc(new_length, GFP_KERNEL);
 419         if (!new_name)
 420                 return;
 421
 422         snprintf(new_name, new_length, "Logitech %s", *name);
 423
 424         kfree(*name);
 425
 426         *name = new_name;
 427 }
 428
 429 /**
 430  * hidpp_scroll_counter_handle_scroll() - Send high- and low-resolution scroll
 431  *                                        events given a high-resolution wheel
 432  *                                        movement.
 433  * @counter: a hid_scroll_counter struct describing the wheel.
 434  * @hi_res_value: the movement of the wheel, in the mouse's high-resolution
 435  *                units.
 436  *
 437  * Given a high-resolution movement, this function converts the movement into
 438  * fractions of 120 and emits high-resolution scroll events for the input
 439  * device. It also uses the multiplier from &struct hid_scroll_counter to
 440  * emit low-resolution scroll events when appropriate for
 441  * backwards-compatibility with userspace input libraries.
 442  */
 443 static void hidpp_scroll_counter_handle_scroll(struct input_dev *input_dev,
 444                                                struct hidpp_scroll_counter *counter,
 445                                                int hi_res_value)
 446 {
 447         int low_res_value, remainder, direction;
 448         unsigned long long now, previous;
 449
 450         hi_res_value = hi_res_value * 120/counter->wheel_multiplier;
 451         input_report_rel(input_dev, REL_WHEEL_HI_RES, hi_res_value);
 452
 453         remainder = counter->remainder;
 454         direction = hi_res_value > 0 ? 1 : -1;
 455
 456         now = sched_clock();
 457         previous = counter->last_time;
 458         counter->last_time = now;
 459         /*
 460          * Reset the remainder after a period of inactivity or when the
 461          * direction changes. This prevents the REL_WHEEL emulation point
 462          * from sliding for devices that don't always provide the same
 463          * number of movements per detent.
 464          */
 465         if (now - previous > 1000000000 || direction != counter->direction)
 466                 remainder = 0;
 467
 468         counter->direction = direction;
 469         remainder += hi_res_value;
 470
 471         /* Some wheels will rest 7/8ths of a detent from the previous detent
 472          * after slow movement, so we want the threshold for low-res events to
 473          * be in the middle between two detents (e.g. after 4/8ths) as
 474          * opposed to on the detents themselves (8/8ths).
 475          */
 476         if (abs(remainder) >= 60) {
 477                 /* Add (or subtract) 1 because we want to trigger when the wheel
 478                  * is half-way to the next detent (i.e. scroll 1 detent after a
 479                  * 1/2 detent movement, 2 detents after a 1 1/2 detent movement,
 480                  * etc.).
 481                  */
 482                 low_res_value = remainder / 120;
 483                 if (low_res_value == 0)
 484                         low_res_value = (hi_res_value > 0 ? 1 : -1);
 485                 input_report_rel(input_dev, REL_WHEEL, low_res_value);
 486                 remainder -= low_res_value * 120;
 487         }
 488         counter->remainder = remainder;
 489 }
 490
 491 /* -------------------------------------------------------------------------- */
 492 /* HIDP++ 1.0 commands                                                        */
 493 /* -------------------------------------------------------------------------- */
 494
 495 #define HIDPP_SET_REGISTER                              0x80
 496 #define HIDPP_GET_REGISTER                              0x81
 497 #define HIDPP_SET_LONG_REGISTER                         0x82
 498 #define HIDPP_GET_LONG_REGISTER                         0x83
 499
 500 /**
 501  * hidpp10_set_register - Modify a HID++ 1.0 register.
 502  * @hidpp_dev: the device to set the register on.
 503  * @register_address: the address of the register to modify.
 504  * @byte: the byte of the register to modify. Should be less than 3.
 505  * @mask: mask of the bits to modify
 506  * @value: new values for the bits in mask
 507  * Return: 0 if successful, otherwise a negative error code.
 508  */
 509 static int hidpp10_set_register(struct hidpp_device *hidpp_dev,
 510         u8 register_address, u8 byte, u8 mask, u8 value)
 511 {
 512         struct hidpp_report response;
 513         int ret;
 514         u8 params[3] = { 0 };
 515
 516         ret = hidpp_send_rap_command_sync(hidpp_dev,
 517                                           REPORT_ID_HIDPP_SHORT,
 518                                           HIDPP_GET_REGISTER,
 519                                           register_address,
 520                                           NULL, 0, &response);
 521         if (ret)
 522                 return ret;
 523
 524         memcpy(params, response.rap.params, 3);
 525
 526         params[byte] &= ~mask;
 527         params[byte] |= value & mask;
 528
 529         return hidpp_send_rap_command_sync(hidpp_dev,
 530                                            REPORT_ID_HIDPP_SHORT,
 531                                            HIDPP_SET_REGISTER,
 532                                            register_address,
 533                                            params, 3, &response);
 534 }
 535
 536 #define HIDPP_REG_ENABLE_REPORTS                        0x00
 537 #define HIDPP_ENABLE_CONSUMER_REPORT                    BIT(0)
 538 #define HIDPP_ENABLE_WHEEL_REPORT                       BIT(2)
 539 #define HIDPP_ENABLE_MOUSE_EXTRA_BTN_REPORT             BIT(3)
 540 #define HIDPP_ENABLE_BAT_REPORT                         BIT(4)
 541 #define HIDPP_ENABLE_HWHEEL_REPORT                      BIT(5)
 542
 543 static int hidpp10_enable_battery_reporting(struct hidpp_device *hidpp_dev)
 544 {
 545         return hidpp10_set_register(hidpp_dev, HIDPP_REG_ENABLE_REPORTS, 0,
 546                           HIDPP_ENABLE_BAT_REPORT, HIDPP_ENABLE_BAT_REPORT);
 547 }
 548
 549 #define HIDPP_REG_FEATURES                              0x01
 550 #define HIDPP_ENABLE_SPECIAL_BUTTON_FUNC                BIT(1)
 551 #define HIDPP_ENABLE_FAST_SCROLL                        BIT(6)
 552
 553 /* On HID++ 1.0 devices, high-res scroll was called "scrolling acceleration". */
 554 static int hidpp10_enable_scrolling_acceleration(struct hidpp_device *hidpp_dev)
 555 {
 556         return hidpp10_set_register(hidpp_dev, HIDPP_REG_FEATURES, 0,
 557                           HIDPP_ENABLE_FAST_SCROLL, HIDPP_ENABLE_FAST_SCROLL);
 558 }
 559
 560 #define HIDPP_REG_BATTERY_STATUS                        0x07
 561
 562 static int hidpp10_battery_status_map_level(u8 param)
 563 {
 564         int level;
 565
 566         switch (param) {
 567         case 1 ... 2:
 568                 level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
 569                 break;
 570         case 3 ... 4:
 571                 level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 572                 break;
 573         case 5 ... 6:
 574                 level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
 575                 break;
 576         case 7:
 577                 level = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
 578                 break;
 579         default:
 580                 level = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
 581         }
 582
 583         return level;
 584 }
 585
 586 static int hidpp10_battery_status_map_status(u8 param)
 587 {
 588         int status;
 589
 590         switch (param) {
 591         case 0x00:
 592                 /* discharging (in use) */
 593                 status = POWER_SUPPLY_STATUS_DISCHARGING;
 594                 break;
 595         case 0x21: /* (standard) charging */
 596         case 0x24: /* fast charging */
 597         case 0x25: /* slow charging */
 598                 status = POWER_SUPPLY_STATUS_CHARGING;
 599                 break;
 600         case 0x26: /* topping charge */
 601         case 0x22: /* charge complete */
 602                 status = POWER_SUPPLY_STATUS_FULL;
 603                 break;
 604         case 0x20: /* unknown */
 605                 status = POWER_SUPPLY_STATUS_UNKNOWN;
 606                 break;
 607         /*
 608          * 0x01...0x1F = reserved (not charging)
 609          * 0x23 = charging error
 610          * 0x27..0xff = reserved
 611          */
 612         default:
 613                 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
 614                 break;
 615         }
 616
 617         return status;
 618 }
 619
 620 static int hidpp10_query_battery_status(struct hidpp_device *hidpp)
 621 {
 622         struct hidpp_report response;
 623         int ret, status;
 624
 625         ret = hidpp_send_rap_command_sync(hidpp,
 626                                         REPORT_ID_HIDPP_SHORT,
 627                                         HIDPP_GET_REGISTER,
 628                                         HIDPP_REG_BATTERY_STATUS,
 629                                         NULL, 0, &response);
 630         if (ret)
 631                 return ret;
 632
 633         hidpp->battery.level =
 634                 hidpp10_battery_status_map_level(response.rap.params[0]);
 635         status = hidpp10_battery_status_map_status(response.rap.params[1]);
 636         hidpp->battery.status = status;
 637         /* the capacity is only available when discharging or full */
 638         hidpp->battery.online = status == POWER_SUPPLY_STATUS_DISCHARGING ||
 639                                 status == POWER_SUPPLY_STATUS_FULL;
 640
 641         return 0;
 642 }
 643
 644 #define HIDPP_REG_BATTERY_MILEAGE                       0x0D
 645
 646 static int hidpp10_battery_mileage_map_status(u8 param)
 647 {
 648         int status;
 649
 650         switch (param >> 6) {
 651         case 0x00:
 652                 /* discharging (in use) */
 653                 status = POWER_SUPPLY_STATUS_DISCHARGING;
 654                 break;
 655         case 0x01: /* charging */
 656                 status = POWER_SUPPLY_STATUS_CHARGING;
 657                 break;
 658         case 0x02: /* charge complete */
 659                 status = POWER_SUPPLY_STATUS_FULL;
 660                 break;
 661         /*
 662          * 0x03 = charging error
 663          */
 664         default:
 665                 status = POWER_SUPPLY_STATUS_NOT_CHARGING;
 666                 break;
 667         }
 668
 669         return status;
 670 }
 671
 672 static int hidpp10_query_battery_mileage(struct hidpp_device *hidpp)
 673 {
 674         struct hidpp_report response;
 675         int ret, status;
 676
 677         ret = hidpp_send_rap_command_sync(hidpp,
 678                                         REPORT_ID_HIDPP_SHORT,
 679                                         HIDPP_GET_REGISTER,
 680                                         HIDPP_REG_BATTERY_MILEAGE,
 681                                         NULL, 0, &response);
 682         if (ret)
 683                 return ret;
 684
 685         hidpp->battery.capacity = response.rap.params[0];
 686         status = hidpp10_battery_mileage_map_status(response.rap.params[2]);
 687         hidpp->battery.status = status;
 688         /* the capacity is only available when discharging or full */
 689         hidpp->battery.online = status == POWER_SUPPLY_STATUS_DISCHARGING ||
 690                                 status == POWER_SUPPLY_STATUS_FULL;
 691
 692         return 0;
 693 }
 694
 695 static int hidpp10_battery_event(struct hidpp_device *hidpp, u8 *data, int size)
 696 {
 697         struct hidpp_report *report = (struct hidpp_report *)data;
 698         int status, capacity, level;
 699         bool changed;
 700
 701         if (report->report_id != REPORT_ID_HIDPP_SHORT)
 702                 return 0;
 703
 704         switch (report->rap.sub_id) {
 705         case HIDPP_REG_BATTERY_STATUS:
 706                 capacity = hidpp->battery.capacity;
 707                 level = hidpp10_battery_status_map_level(report->rawbytes[1]);
 708                 status = hidpp10_battery_status_map_status(report->rawbytes[2]);
 709                 break;
 710         case HIDPP_REG_BATTERY_MILEAGE:
 711                 capacity = report->rap.params[0];
 712                 level = hidpp->battery.level;
 713                 status = hidpp10_battery_mileage_map_status(report->rawbytes[3]);
 714                 break;
 715         default:
 716                 return 0;
 717         }
 718
 719         changed = capacity != hidpp->battery.capacity ||
 720                   level != hidpp->battery.level ||
 721                   status != hidpp->battery.status;
 722
 723         /* the capacity is only available when discharging or full */
 724         hidpp->battery.online = status == POWER_SUPPLY_STATUS_DISCHARGING ||
 725                                 status == POWER_SUPPLY_STATUS_FULL;
 726
 727         if (changed) {
 728                 hidpp->battery.level = level;
 729                 hidpp->battery.status = status;
 730                 if (hidpp->battery.ps)
 731                         power_supply_changed(hidpp->battery.ps);
 732         }
 733
 734         return 0;
 735 }
 736
 737 #define HIDPP_REG_PAIRING_INFORMATION                   0xB5
 738 #define HIDPP_EXTENDED_PAIRING                          0x30
 739 #define HIDPP_DEVICE_NAME                               0x40
 740
 741 static char *hidpp_unifying_get_name(struct hidpp_device *hidpp_dev)
 742 {
 743         struct hidpp_report response;
 744         int ret;
 745         u8 params[1] = { HIDPP_DEVICE_NAME };
 746         char *name;
 747         int len;
 748
 749         ret = hidpp_send_rap_command_sync(hidpp_dev,
 750                                         REPORT_ID_HIDPP_SHORT,
 751                                         HIDPP_GET_LONG_REGISTER,
 752                                         HIDPP_REG_PAIRING_INFORMATION,
 753                                         params, 1, &response);
 754         if (ret)
 755                 return NULL;
 756
 757         len = response.rap.params[1];
 758
 759         if (2 + len > sizeof(response.rap.params))
 760                 return NULL;
 761
 762         if (len < 4) /* logitech devices are usually at least Xddd */
 763                 return NULL;
 764
 765         name = kzalloc(len + 1, GFP_KERNEL);
 766         if (!name)
 767                 return NULL;
 768
 769         memcpy(name, &response.rap.params[2], len);
 770
 771         /* include the terminating '\0' */
 772         hidpp_prefix_name(&name, len + 1);
 773
 774         return name;
 775 }
 776
 777 static int hidpp_unifying_get_serial(struct hidpp_device *hidpp, u32 *serial)
 778 {
 779         struct hidpp_report response;
 780         int ret;
 781         u8 params[1] = { HIDPP_EXTENDED_PAIRING };
 782
 783         ret = hidpp_send_rap_command_sync(hidpp,
 784                                         REPORT_ID_HIDPP_SHORT,
 785                                         HIDPP_GET_LONG_REGISTER,
 786                                         HIDPP_REG_PAIRING_INFORMATION,
 787                                         params, 1, &response);
 788         if (ret)
 789                 return ret;
 790
 791         /*
 792          * We don't care about LE or BE, we will output it as a string
 793          * with %4phD, so we need to keep the order.
 794          */
 795         *serial = *((u32 *)&response.rap.params[1]);
 796         return 0;
 797 }
 798
 799 static int hidpp_unifying_init(struct hidpp_device *hidpp)
 800 {
 801         struct hid_device *hdev = hidpp->hid_dev;
 802         const char *name;
 803         u32 serial;
 804         int ret;
 805
 806         ret = hidpp_unifying_get_serial(hidpp, &serial);
 807         if (ret)
 808                 return ret;
 809
 810         snprintf(hdev->uniq, sizeof(hdev->uniq), "%04x-%4phD",
 811                  hdev->product, &serial);
 812         dbg_hid("HID++ Unifying: Got serial: %s\n", hdev->uniq);
 813
 814         name = hidpp_unifying_get_name(hidpp);
 815         if (!name)
 816                 return -EIO;
 817
 818         snprintf(hdev->name, sizeof(hdev->name), "%s", name);
 819         dbg_hid("HID++ Unifying: Got name: %s\n", name);
 820
 821         kfree(name);
 822         return 0;
 823 }
 824
 825 /* -------------------------------------------------------------------------- */
 826 /* 0x0000: Root                                                               */
 827 /* -------------------------------------------------------------------------- */
 828
 829 #define HIDPP_PAGE_ROOT                                 0x0000
 830 #define HIDPP_PAGE_ROOT_IDX                             0x00
 831
 832 #define CMD_ROOT_GET_FEATURE                            0x01
 833 #define CMD_ROOT_GET_PROTOCOL_VERSION                   0x11
 834
 835 static int hidpp_root_get_feature(struct hidpp_device *hidpp, u16 feature,
 836         u8 *feature_index, u8 *feature_type)
 837 {
 838         struct hidpp_report response;
 839         int ret;
 840         u8 params[2] = { feature >> 8, feature & 0x00FF };
 841
 842         ret = hidpp_send_fap_command_sync(hidpp,
 843                         HIDPP_PAGE_ROOT_IDX,
 844                         CMD_ROOT_GET_FEATURE,
 845                         params, 2, &response);
 846         if (ret)
 847                 return ret;
 848
 849         if (response.fap.params[0] == 0)
 850                 return -ENOENT;
 851
 852         *feature_index = response.fap.params[0];
 853         *feature_type = response.fap.params[1];
 854
 855         return ret;
 856 }
 857
 858 static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
 859 {
 860         const u8 ping_byte = 0x5a;
 861         u8 ping_data[3] = { 0, 0, ping_byte };
 862         struct hidpp_report response;
 863         int ret;
 864
 865         ret = hidpp_send_rap_command_sync(hidpp,
 866                         REPORT_ID_HIDPP_SHORT,
 867                         HIDPP_PAGE_ROOT_IDX,
 868                         CMD_ROOT_GET_PROTOCOL_VERSION,
 869                         ping_data, sizeof(ping_data), &response);
 870
 871         if (ret == HIDPP_ERROR_INVALID_SUBID) {
 872                 hidpp->protocol_major = 1;
 873                 hidpp->protocol_minor = 0;
 874                 goto print_version;
 875         }
 876
 877         /* the device might not be connected */
 878         if (ret == HIDPP_ERROR_RESOURCE_ERROR)
 879                 return -EIO;
 880
 881         if (ret > 0) {
 882                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
 883                         __func__, ret);
 884                 return -EPROTO;
 885         }
 886         if (ret)
 887                 return ret;
 888
 889         if (response.rap.params[2] != ping_byte) {
 890                 hid_err(hidpp->hid_dev, "%s: ping mismatch 0x%02x != 0x%02x\n",
 891                         __func__, response.rap.params[2], ping_byte);
 892                 return -EPROTO;
 893         }
 894
 895         hidpp->protocol_major = response.rap.params[0];
 896         hidpp->protocol_minor = response.rap.params[1];
 897
 898 print_version:
 899         hid_info(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
 900                  hidpp->protocol_major, hidpp->protocol_minor);
 901         return 0;
 902 }
 903
 904 /* -------------------------------------------------------------------------- */
 905 /* 0x0005: GetDeviceNameType                                                  */
 906 /* -------------------------------------------------------------------------- */
 907
 908 #define HIDPP_PAGE_GET_DEVICE_NAME_TYPE                 0x0005
 909
 910 #define CMD_GET_DEVICE_NAME_TYPE_GET_COUNT              0x01
 911 #define CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME        0x11
 912 #define CMD_GET_DEVICE_NAME_TYPE_GET_TYPE               0x21
 913
 914 static int hidpp_devicenametype_get_count(struct hidpp_device *hidpp,
 915         u8 feature_index, u8 *nameLength)
 916 {
 917         struct hidpp_report response;
 918         int ret;
 919
 920         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
 921                 CMD_GET_DEVICE_NAME_TYPE_GET_COUNT, NULL, 0, &response);
 922
 923         if (ret > 0) {
 924                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
 925                         __func__, ret);
 926                 return -EPROTO;
 927         }
 928         if (ret)
 929                 return ret;
 930
 931         *nameLength = response.fap.params[0];
 932
 933         return ret;
 934 }
 935
 936 static int hidpp_devicenametype_get_device_name(struct hidpp_device *hidpp,
 937         u8 feature_index, u8 char_index, char *device_name, int len_buf)
 938 {
 939         struct hidpp_report response;
 940         int ret, i;
 941         int count;
 942
 943         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
 944                 CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME, &char_index, 1,
 945                 &response);
 946
 947         if (ret > 0) {
 948                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
 949                         __func__, ret);
 950                 return -EPROTO;
 951         }
 952         if (ret)
 953                 return ret;
 954
 955         switch (response.report_id) {
 956         case REPORT_ID_HIDPP_VERY_LONG:
 957                 count = hidpp->very_long_report_length - 4;
 958                 break;
 959         case REPORT_ID_HIDPP_LONG:
 960                 count = HIDPP_REPORT_LONG_LENGTH - 4;
 961                 break;
 962         case REPORT_ID_HIDPP_SHORT:
 963                 count = HIDPP_REPORT_SHORT_LENGTH - 4;
 964                 break;
 965         default:
 966                 return -EPROTO;
 967         }
 968
 969         if (len_buf < count)
 970                 count = len_buf;
 971
 972         for (i = 0; i < count; i++)
 973                 device_name[i] = response.fap.params[i];
 974
 975         return count;
 976 }
 977
 978 static char *hidpp_get_device_name(struct hidpp_device *hidpp)
 979 {
 980         u8 feature_type;
 981         u8 feature_index;
 982         u8 __name_length;
 983         char *name;
 984         unsigned index = 0;
 985         int ret;
 986
 987         ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_GET_DEVICE_NAME_TYPE,
 988                 &feature_index, &feature_type);
 989         if (ret)
 990                 return NULL;
 991
 992         ret = hidpp_devicenametype_get_count(hidpp, feature_index,
 993                 &__name_length);
 994         if (ret)
 995                 return NULL;
 996
 997         name = kzalloc(__name_length + 1, GFP_KERNEL);
 998         if (!name)
 999                 return NULL;
1000
1001         while (index < __name_length) {
1002                 ret = hidpp_devicenametype_get_device_name(hidpp,
1003                         feature_index, index, name + index,
1004                         __name_length - index);
1005                 if (ret <= 0) {
1006                         kfree(name);
1007                         return NULL;
1008                 }
1009                 index += ret;
1010         }
1011
1012         /* include the terminating '\0' */
1013         hidpp_prefix_name(&name, __name_length + 1);
1014
1015         return name;
1016 }
1017
1018 /* -------------------------------------------------------------------------- */
1019 /* 0x1000: Battery level status                                               */
1020 /* -------------------------------------------------------------------------- */
1021
1022 #define HIDPP_PAGE_BATTERY_LEVEL_STATUS                         0x1000
1023
1024 #define CMD_BATTERY_LEVEL_STATUS_GET_BATTERY_LEVEL_STATUS       0x00
1025 #define CMD_BATTERY_LEVEL_STATUS_GET_BATTERY_CAPABILITY         0x10
1026
1027 #define EVENT_BATTERY_LEVEL_STATUS_BROADCAST                    0x00
1028
1029 #define FLAG_BATTERY_LEVEL_DISABLE_OSD                          BIT(0)
1030 #define FLAG_BATTERY_LEVEL_MILEAGE                              BIT(1)
1031 #define FLAG_BATTERY_LEVEL_RECHARGEABLE                         BIT(2)
1032
1033 static int hidpp_map_battery_level(int capacity)
1034 {
1035         if (capacity < 11)
1036                 return POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1037         /*
1038          * The spec says this should be < 31 but some devices report 30
1039          * with brand new batteries and Windows reports 30 as "Good".
1040          */
1041         else if (capacity < 30)
1042                 return POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1043         else if (capacity < 81)
1044                 return POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1045         return POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1046 }
1047
1048 static int hidpp20_batterylevel_map_status_capacity(u8 data[3], int *capacity,
1049                                                     int *next_capacity,
1050                                                     int *level)
1051 {
1052         int status;
1053
1054         *capacity = data[0];
1055         *next_capacity = data[1];
1056         *level = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
1057
1058         /* When discharging, we can rely on the device reported capacity.
1059          * For all other states the device reports 0 (unknown).
1060          */
1061         switch (data[2]) {
1062                 case 0: /* discharging (in use) */
1063                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1064                         *level = hidpp_map_battery_level(*capacity);
1065                         break;
1066                 case 1: /* recharging */
1067                         status = POWER_SUPPLY_STATUS_CHARGING;
1068                         break;
1069                 case 2: /* charge in final stage */
1070                         status = POWER_SUPPLY_STATUS_CHARGING;
1071                         break;
1072                 case 3: /* charge complete */
1073                         status = POWER_SUPPLY_STATUS_FULL;
1074                         *level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1075                         *capacity = 100;
1076                         break;
1077                 case 4: /* recharging below optimal speed */
1078                         status = POWER_SUPPLY_STATUS_CHARGING;
1079                         break;
1080                 /* 5 = invalid battery type
1081                    6 = thermal error
1082                    7 = other charging error */
1083                 default:
1084                         status = POWER_SUPPLY_STATUS_NOT_CHARGING;
1085                         break;
1086         }
1087
1088         return status;
1089 }
1090
1091 static int hidpp20_batterylevel_get_battery_capacity(struct hidpp_device *hidpp,
1092                                                      u8 feature_index,
1093                                                      int *status,
1094                                                      int *capacity,
1095                                                      int *next_capacity,
1096                                                      int *level)
1097 {
1098         struct hidpp_report response;
1099         int ret;
1100         u8 *params = (u8 *)response.fap.params;
1101
1102         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
1103                                           CMD_BATTERY_LEVEL_STATUS_GET_BATTERY_LEVEL_STATUS,
1104                                           NULL, 0, &response);
1105         /* Ignore these intermittent errors */
1106         if (ret == HIDPP_ERROR_RESOURCE_ERROR)
1107                 return -EIO;
1108         if (ret > 0) {
1109                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
1110                         __func__, ret);
1111                 return -EPROTO;
1112         }
1113         if (ret)
1114                 return ret;
1115
1116         *status = hidpp20_batterylevel_map_status_capacity(params, capacity,
1117                                                            next_capacity,
1118                                                            level);
1119
1120         return 0;
1121 }
1122
1123 static int hidpp20_batterylevel_get_battery_info(struct hidpp_device *hidpp,
1124                                                   u8 feature_index)
1125 {
1126         struct hidpp_report response;
1127         int ret;
1128         u8 *params = (u8 *)response.fap.params;
1129         unsigned int level_count, flags;
1130
1131         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
1132                                           CMD_BATTERY_LEVEL_STATUS_GET_BATTERY_CAPABILITY,
1133                                           NULL, 0, &response);
1134         if (ret > 0) {
1135                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
1136                         __func__, ret);
1137                 return -EPROTO;
1138         }
1139         if (ret)
1140                 return ret;
1141
1142         level_count = params[0];
1143         flags = params[1];
1144
1145         if (level_count < 10 || !(flags & FLAG_BATTERY_LEVEL_MILEAGE))
1146                 hidpp->capabilities |= HIDPP_CAPABILITY_BATTERY_LEVEL_STATUS;
1147         else
1148                 hidpp->capabilities |= HIDPP_CAPABILITY_BATTERY_MILEAGE;
1149
1150         return 0;
1151 }
1152
1153 static int hidpp20_query_battery_info(struct hidpp_device *hidpp)
1154 {
1155         u8 feature_type;
1156         int ret;
1157         int status, capacity, next_capacity, level;
1158
1159         if (hidpp->battery.feature_index == 0xff) {
1160                 ret = hidpp_root_get_feature(hidpp,
1161                                              HIDPP_PAGE_BATTERY_LEVEL_STATUS,
1162                                              &hidpp->battery.feature_index,
1163                                              &feature_type);
1164                 if (ret)
1165                         return ret;
1166         }
1167
1168         ret = hidpp20_batterylevel_get_battery_capacity(hidpp,
1169                                                 hidpp->battery.feature_index,
1170                                                 &status, &capacity,
1171                                                 &next_capacity, &level);
1172         if (ret)
1173                 return ret;
1174
1175         ret = hidpp20_batterylevel_get_battery_info(hidpp,
1176                                                 hidpp->battery.feature_index);
1177         if (ret)
1178                 return ret;
1179
1180         hidpp->battery.status = status;
1181         hidpp->battery.capacity = capacity;
1182         hidpp->battery.level = level;
1183         /* the capacity is only available when discharging or full */
1184         hidpp->battery.online = status == POWER_SUPPLY_STATUS_DISCHARGING ||
1185                                 status == POWER_SUPPLY_STATUS_FULL;
1186
1187         return 0;
1188 }
1189
1190 static int hidpp20_battery_event(struct hidpp_device *hidpp,
1191                                  u8 *data, int size)
1192 {
1193         struct hidpp_report *report = (struct hidpp_report *)data;
1194         int status, capacity, next_capacity, level;
1195         bool changed;
1196
1197         if (report->fap.feature_index != hidpp->battery.feature_index ||
1198             report->fap.funcindex_clientid != EVENT_BATTERY_LEVEL_STATUS_BROADCAST)
1199                 return 0;
1200
1201         status = hidpp20_batterylevel_map_status_capacity(report->fap.params,
1202                                                           &capacity,
1203                                                           &next_capacity,
1204                                                           &level);
1205
1206         /* the capacity is only available when discharging or full */
1207         hidpp->battery.online = status == POWER_SUPPLY_STATUS_DISCHARGING ||
1208                                 status == POWER_SUPPLY_STATUS_FULL;
1209
1210         changed = capacity != hidpp->battery.capacity ||
1211                   level != hidpp->battery.level ||
1212                   status != hidpp->battery.status;
1213
1214         if (changed) {
1215                 hidpp->battery.level = level;
1216                 hidpp->battery.capacity = capacity;
1217                 hidpp->battery.status = status;
1218                 if (hidpp->battery.ps)
1219                         power_supply_changed(hidpp->battery.ps);
1220         }
1221
1222         return 0;
1223 }
1224
1225 static enum power_supply_property hidpp_battery_props[] = {
1226         POWER_SUPPLY_PROP_ONLINE,
1227         POWER_SUPPLY_PROP_STATUS,
1228         POWER_SUPPLY_PROP_SCOPE,
1229         POWER_SUPPLY_PROP_MODEL_NAME,
1230         POWER_SUPPLY_PROP_MANUFACTURER,
1231         POWER_SUPPLY_PROP_SERIAL_NUMBER,
1232         0, /* placeholder for POWER_SUPPLY_PROP_CAPACITY, */
1233         0, /* placeholder for POWER_SUPPLY_PROP_CAPACITY_LEVEL, */
1234 };
1235
1236 static int hidpp_battery_get_property(struct power_supply *psy,
1237                                       enum power_supply_property psp,
1238                                       union power_supply_propval *val)
1239 {
1240         struct hidpp_device *hidpp = power_supply_get_drvdata(psy);
1241         int ret = 0;
1242
1243         switch(psp) {
1244                 case POWER_SUPPLY_PROP_STATUS:
1245                         val->intval = hidpp->battery.status;
1246                         break;
1247                 case POWER_SUPPLY_PROP_CAPACITY:
1248                         val->intval = hidpp->battery.capacity;
1249                         break;
1250                 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1251                         val->intval = hidpp->battery.level;
1252                         break;
1253                 case POWER_SUPPLY_PROP_SCOPE:
1254                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1255                         break;
1256                 case POWER_SUPPLY_PROP_ONLINE:
1257                         val->intval = hidpp->battery.online;
1258                         break;
1259                 case POWER_SUPPLY_PROP_MODEL_NAME:
1260                         if (!strncmp(hidpp->name, "Logitech ", 9))
1261                                 val->strval = hidpp->name + 9;
1262                         else
1263                                 val->strval = hidpp->name;
1264                         break;
1265                 case POWER_SUPPLY_PROP_MANUFACTURER:
1266                         val->strval = "Logitech";
1267                         break;
1268                 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
1269                         val->strval = hidpp->hid_dev->uniq;
1270                         break;
1271                 default:
1272                         ret = -EINVAL;
1273                         break;
1274         }
1275
1276         return ret;
1277 }
1278
1279 /* -------------------------------------------------------------------------- */
1280 /* 0x2120: Hi-resolution scrolling                                            */
1281 /* -------------------------------------------------------------------------- */
1282
1283 #define HIDPP_PAGE_HI_RESOLUTION_SCROLLING                      0x2120
1284
1285 #define CMD_HI_RESOLUTION_SCROLLING_SET_HIGHRES_SCROLLING_MODE  0x10
1286
1287 static int hidpp_hrs_set_highres_scrolling_mode(struct hidpp_device *hidpp,
1288         bool enabled, u8 *multiplier)
1289 {
1290         u8 feature_index;
1291         u8 feature_type;
1292         int ret;
1293         u8 params[1];
1294         struct hidpp_report response;
1295
1296         ret = hidpp_root_get_feature(hidpp,
1297                                      HIDPP_PAGE_HI_RESOLUTION_SCROLLING,
1298                                      &feature_index,
1299                                      &feature_type);
1300         if (ret)
1301                 return ret;
1302
1303         params[0] = enabled ? BIT(0) : 0;
1304         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
1305                                           CMD_HI_RESOLUTION_SCROLLING_SET_HIGHRES_SCROLLING_MODE,
1306                                           params, sizeof(params), &response);
1307         if (ret)
1308                 return ret;
1309         *multiplier = response.fap.params[1];
1310         return 0;
1311 }
1312
1313 /* -------------------------------------------------------------------------- */
1314 /* 0x2121: HiRes Wheel                                                        */
1315 /* -------------------------------------------------------------------------- */
1316
1317 #define HIDPP_PAGE_HIRES_WHEEL          0x2121
1318
1319 #define CMD_HIRES_WHEEL_GET_WHEEL_CAPABILITY    0x00
1320 #define CMD_HIRES_WHEEL_SET_WHEEL_MODE          0x20
1321
1322 static int hidpp_hrw_get_wheel_capability(struct hidpp_device *hidpp,
1323         u8 *multiplier)
1324 {
1325         u8 feature_index;
1326         u8 feature_type;
1327         int ret;
1328         struct hidpp_report response;
1329
1330         ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_HIRES_WHEEL,
1331                                      &feature_index, &feature_type);
1332         if (ret)
1333                 goto return_default;
1334
1335         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
1336                                           CMD_HIRES_WHEEL_GET_WHEEL_CAPABILITY,
1337                                           NULL, 0, &response);
1338         if (ret)
1339                 goto return_default;
1340
1341         *multiplier = response.fap.params[0];
1342         return 0;
1343 return_default:
1344         hid_warn(hidpp->hid_dev,
1345                  "Couldn't get wheel multiplier (error %d)\n", ret);
1346         return ret;
1347 }
1348
1349 static int hidpp_hrw_set_wheel_mode(struct hidpp_device *hidpp, bool invert,
1350         bool high_resolution, bool use_hidpp)
1351 {
1352         u8 feature_index;
1353         u8 feature_type;
1354         int ret;
1355         u8 params[1];
1356         struct hidpp_report response;
1357
1358         ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_HIRES_WHEEL,
1359                                      &feature_index, &feature_type);
1360         if (ret)
1361                 return ret;
1362
1363         params[0] = (invert          ? BIT(2) : 0) |
1364                     (high_resolution ? BIT(1) : 0) |
1365                     (use_hidpp       ? BIT(0) : 0);
1366
1367         return hidpp_send_fap_command_sync(hidpp, feature_index,
1368                                            CMD_HIRES_WHEEL_SET_WHEEL_MODE,
1369                                            params, sizeof(params), &response);
1370 }
1371
1372 /* -------------------------------------------------------------------------- */
1373 /* 0x4301: Solar Keyboard                                                     */
1374 /* -------------------------------------------------------------------------- */
1375
1376 #define HIDPP_PAGE_SOLAR_KEYBOARD                       0x4301
1377
1378 #define CMD_SOLAR_SET_LIGHT_MEASURE                     0x00
1379
1380 #define EVENT_SOLAR_BATTERY_BROADCAST                   0x00
1381 #define EVENT_SOLAR_BATTERY_LIGHT_MEASURE               0x10
1382 #define EVENT_SOLAR_CHECK_LIGHT_BUTTON                  0x20
1383
1384 static int hidpp_solar_request_battery_event(struct hidpp_device *hidpp)
1385 {
1386         struct hidpp_report response;
1387         u8 params[2] = { 1, 1 };
1388         u8 feature_type;
1389         int ret;
1390
1391         if (hidpp->battery.feature_index == 0xff) {
1392                 ret = hidpp_root_get_feature(hidpp,
1393                                              HIDPP_PAGE_SOLAR_KEYBOARD,
1394                                              &hidpp->battery.solar_feature_index,
1395                                              &feature_type);
1396                 if (ret)
1397                         return ret;
1398         }
1399
1400         ret = hidpp_send_fap_command_sync(hidpp,
1401                                           hidpp->battery.solar_feature_index,
1402                                           CMD_SOLAR_SET_LIGHT_MEASURE,
1403                                           params, 2, &response);
1404         if (ret > 0) {
1405                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
1406                         __func__, ret);
1407                 return -EPROTO;
1408         }
1409         if (ret)
1410                 return ret;
1411
1412         hidpp->capabilities |= HIDPP_CAPABILITY_BATTERY_MILEAGE;
1413
1414         return 0;
1415 }
1416
1417 static int hidpp_solar_battery_event(struct hidpp_device *hidpp,
1418                                      u8 *data, int size)
1419 {
1420         struct hidpp_report *report = (struct hidpp_report *)data;
1421         int capacity, lux, status;
1422         u8 function;
1423
1424         function = report->fap.funcindex_clientid;
1425
1426
1427         if (report->fap.feature_index != hidpp->battery.solar_feature_index ||
1428             !(function == EVENT_SOLAR_BATTERY_BROADCAST ||
1429               function == EVENT_SOLAR_BATTERY_LIGHT_MEASURE ||
1430               function == EVENT_SOLAR_CHECK_LIGHT_BUTTON))
1431                 return 0;
1432
1433         capacity = report->fap.params[0];
1434
1435         switch (function) {
1436         case EVENT_SOLAR_BATTERY_LIGHT_MEASURE:
1437                 lux = (report->fap.params[1] << 8) | report->fap.params[2];
1438                 if (lux > 200)
1439                         status = POWER_SUPPLY_STATUS_CHARGING;
1440                 else
1441                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1442                 break;
1443         case EVENT_SOLAR_CHECK_LIGHT_BUTTON:
1444         default:
1445                 if (capacity < hidpp->battery.capacity)
1446                         status = POWER_SUPPLY_STATUS_DISCHARGING;
1447                 else
1448                         status = POWER_SUPPLY_STATUS_CHARGING;
1449
1450         }
1451
1452         if (capacity == 100)
1453                 status = POWER_SUPPLY_STATUS_FULL;
1454
1455         hidpp->battery.online = true;
1456         if (capacity != hidpp->battery.capacity ||
1457             status != hidpp->battery.status) {
1458                 hidpp->battery.capacity = capacity;
1459                 hidpp->battery.status = status;
1460                 if (hidpp->battery.ps)
1461                         power_supply_changed(hidpp->battery.ps);
1462         }
1463
1464         return 0;
1465 }
1466
1467 /* -------------------------------------------------------------------------- */
1468 /* 0x6010: Touchpad FW items                                                  */
1469 /* -------------------------------------------------------------------------- */
1470
1471 #define HIDPP_PAGE_TOUCHPAD_FW_ITEMS                    0x6010
1472
1473 #define CMD_TOUCHPAD_FW_ITEMS_SET                       0x10
1474
1475 struct hidpp_touchpad_fw_items {
1476         uint8_t presence;
1477         uint8_t desired_state;
1478         uint8_t state;
1479         uint8_t persistent;
1480 };
1481
1482 /**
1483  * send a set state command to the device by reading the current items->state
1484  * field. items is then filled with the current state.
1485  */
1486 static int hidpp_touchpad_fw_items_set(struct hidpp_device *hidpp,
1487                                        u8 feature_index,
1488                                        struct hidpp_touchpad_fw_items *items)
1489 {
1490         struct hidpp_report response;
1491         int ret;
1492         u8 *params = (u8 *)response.fap.params;
1493
1494         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
1495                 CMD_TOUCHPAD_FW_ITEMS_SET, &items->state, 1, &response);
1496
1497         if (ret > 0) {
1498                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
1499                         __func__, ret);
1500                 return -EPROTO;
1501         }
1502         if (ret)
1503                 return ret;
1504
1505         items->presence = params[0];
1506         items->desired_state = params[1];
1507         items->state = params[2];
1508         items->persistent = params[3];
1509
1510         return 0;
1511 }
1512
1513 /* -------------------------------------------------------------------------- */
1514 /* 0x6100: TouchPadRawXY                                                      */
1515 /* -------------------------------------------------------------------------- */
1516
1517 #define HIDPP_PAGE_TOUCHPAD_RAW_XY                      0x6100
1518
1519 #define CMD_TOUCHPAD_GET_RAW_INFO                       0x01
1520 #define CMD_TOUCHPAD_SET_RAW_REPORT_STATE               0x21
1521
1522 #define EVENT_TOUCHPAD_RAW_XY                           0x00
1523
1524 #define TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT               0x01
1525 #define TOUCHPAD_RAW_XY_ORIGIN_UPPER_LEFT               0x03
1526
1527 struct hidpp_touchpad_raw_info {
1528         u16 x_size;
1529         u16 y_size;
1530         u8 z_range;
1531         u8 area_range;
1532         u8 timestamp_unit;
1533         u8 maxcontacts;
1534         u8 origin;
1535         u16 res;
1536 };
1537
1538 struct hidpp_touchpad_raw_xy_finger {
1539         u8 contact_type;
1540         u8 contact_status;
1541         u16 x;
1542         u16 y;
1543         u8 z;
1544         u8 area;
1545         u8 finger_id;
1546 };
1547
1548 struct hidpp_touchpad_raw_xy {
1549         u16 timestamp;
1550         struct hidpp_touchpad_raw_xy_finger fingers[2];
1551         u8 spurious_flag;
1552         u8 end_of_frame;
1553         u8 finger_count;
1554         u8 button;
1555 };
1556
1557 static int hidpp_touchpad_get_raw_info(struct hidpp_device *hidpp,
1558         u8 feature_index, struct hidpp_touchpad_raw_info *raw_info)
1559 {
1560         struct hidpp_report response;
1561         int ret;
1562         u8 *params = (u8 *)response.fap.params;
1563
1564         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
1565                 CMD_TOUCHPAD_GET_RAW_INFO, NULL, 0, &response);
1566
1567         if (ret > 0) {
1568                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
1569                         __func__, ret);
1570                 return -EPROTO;
1571         }
1572         if (ret)
1573                 return ret;
1574
1575         raw_info->x_size = get_unaligned_be16(&params[0]);
1576         raw_info->y_size = get_unaligned_be16(&params[2]);
1577         raw_info->z_range = params[4];
1578         raw_info->area_range = params[5];
1579         raw_info->maxcontacts = params[7];
1580         raw_info->origin = params[8];
1581         /* res is given in unit per inch */
1582         raw_info->res = get_unaligned_be16(&params[13]) * 2 / 51;
1583
1584         return ret;
1585 }
1586
1587 static int hidpp_touchpad_set_raw_report_state(struct hidpp_device *hidpp_dev,
1588                 u8 feature_index, bool send_raw_reports,
1589                 bool sensor_enhanced_settings)
1590 {
1591         struct hidpp_report response;
1592
1593         /*
1594          * Params:
1595          *   bit 0 - enable raw
1596          *   bit 1 - 16bit Z, no area
1597          *   bit 2 - enhanced sensitivity
1598          *   bit 3 - width, height (4 bits each) instead of area
1599          *   bit 4 - send raw + gestures (degrades smoothness)
1600          *   remaining bits - reserved
1601          */
1602         u8 params = send_raw_reports | (sensor_enhanced_settings << 2);
1603
1604         return hidpp_send_fap_command_sync(hidpp_dev, feature_index,
1605                 CMD_TOUCHPAD_SET_RAW_REPORT_STATE, &params, 1, &response);
1606 }
1607
1608 static void hidpp_touchpad_touch_event(u8 *data,
1609         struct hidpp_touchpad_raw_xy_finger *finger)
1610 {
1611         u8 x_m = data[0] << 2;
1612         u8 y_m = data[2] << 2;
1613
1614         finger->x = x_m << 6 | data[1];
1615         finger->y = y_m << 6 | data[3];
1616
1617         finger->contact_type = data[0] >> 6;
1618         finger->contact_status = data[2] >> 6;
1619
1620         finger->z = data[4];
1621         finger->area = data[5];
1622         finger->finger_id = data[6] >> 4;
1623 }
1624
1625 static void hidpp_touchpad_raw_xy_event(struct hidpp_device *hidpp_dev,
1626                 u8 *data, struct hidpp_touchpad_raw_xy *raw_xy)
1627 {
1628         memset(raw_xy, 0, sizeof(struct hidpp_touchpad_raw_xy));
1629         raw_xy->end_of_frame = data[8] & 0x01;
1630         raw_xy->spurious_flag = (data[8] >> 1) & 0x01;
1631         raw_xy->finger_count = data[15] & 0x0f;
1632         raw_xy->button = (data[8] >> 2) & 0x01;
1633
1634         if (raw_xy->finger_count) {
1635                 hidpp_touchpad_touch_event(&data[2], &raw_xy->fingers[0]);
1636                 hidpp_touchpad_touch_event(&data[9], &raw_xy->fingers[1]);
1637         }
1638 }
1639
1640 /* -------------------------------------------------------------------------- */
1641 /* 0x8123: Force feedback support                                             */
1642 /* -------------------------------------------------------------------------- */
1643
1644 #define HIDPP_FF_GET_INFO               0x01
1645 #define HIDPP_FF_RESET_ALL              0x11
1646 #define HIDPP_FF_DOWNLOAD_EFFECT        0x21
1647 #define HIDPP_FF_SET_EFFECT_STATE       0x31
1648 #define HIDPP_FF_DESTROY_EFFECT         0x41
1649 #define HIDPP_FF_GET_APERTURE           0x51
1650 #define HIDPP_FF_SET_APERTURE           0x61
1651 #define HIDPP_FF_GET_GLOBAL_GAINS       0x71
1652 #define HIDPP_FF_SET_GLOBAL_GAINS       0x81
1653
1654 #define HIDPP_FF_EFFECT_STATE_GET       0x00
1655 #define HIDPP_FF_EFFECT_STATE_STOP      0x01
1656 #define HIDPP_FF_EFFECT_STATE_PLAY      0x02
1657 #define HIDPP_FF_EFFECT_STATE_PAUSE     0x03
1658
1659 #define HIDPP_FF_EFFECT_CONSTANT        0x00
1660 #define HIDPP_FF_EFFECT_PERIODIC_SINE           0x01
1661 #define HIDPP_FF_EFFECT_PERIODIC_SQUARE         0x02
1662 #define HIDPP_FF_EFFECT_PERIODIC_TRIANGLE       0x03
1663 #define HIDPP_FF_EFFECT_PERIODIC_SAWTOOTHUP     0x04
1664 #define HIDPP_FF_EFFECT_PERIODIC_SAWTOOTHDOWN   0x05
1665 #define HIDPP_FF_EFFECT_SPRING          0x06
1666 #define HIDPP_FF_EFFECT_DAMPER          0x07
1667 #define HIDPP_FF_EFFECT_FRICTION        0x08
1668 #define HIDPP_FF_EFFECT_INERTIA         0x09
1669 #define HIDPP_FF_EFFECT_RAMP            0x0A
1670
1671 #define HIDPP_FF_EFFECT_AUTOSTART       0x80
1672
1673 #define HIDPP_FF_EFFECTID_NONE          -1
1674 #define HIDPP_FF_EFFECTID_AUTOCENTER    -2
1675
1676 #define HIDPP_FF_MAX_PARAMS     20
1677 #define HIDPP_FF_RESERVED_SLOTS 1
1678
1679 struct hidpp_ff_private_data {
1680         struct hidpp_device *hidpp;
1681         u8 feature_index;
1682         u8 version;
1683         u16 gain;
1684         s16 range;
1685         u8 slot_autocenter;
1686         u8 num_effects;
1687         int *effect_ids;
1688         struct workqueue_struct *wq;
1689         atomic_t workqueue_size;
1690 };
1691
1692 struct hidpp_ff_work_data {
1693         struct work_struct work;
1694         struct hidpp_ff_private_data *data;
1695         int effect_id;
1696         u8 command;
1697         u8 params[HIDPP_FF_MAX_PARAMS];
1698         u8 size;
1699 };
1700
1701 static const signed short hidpp_ff_effects[] = {
1702         FF_CONSTANT,
1703         FF_PERIODIC,
1704         FF_SINE,
1705         FF_SQUARE,
1706         FF_SAW_UP,
1707         FF_SAW_DOWN,
1708         FF_TRIANGLE,
1709         FF_SPRING,
1710         FF_DAMPER,
1711         FF_AUTOCENTER,
1712         FF_GAIN,
1713         -1
1714 };
1715
1716 static const signed short hidpp_ff_effects_v2[] = {
1717         FF_RAMP,
1718         FF_FRICTION,
1719         FF_INERTIA,
1720         -1
1721 };
1722
1723 static const u8 HIDPP_FF_CONDITION_CMDS[] = {
1724         HIDPP_FF_EFFECT_SPRING,
1725         HIDPP_FF_EFFECT_FRICTION,
1726         HIDPP_FF_EFFECT_DAMPER,
1727         HIDPP_FF_EFFECT_INERTIA
1728 };
1729
1730 static const char *HIDPP_FF_CONDITION_NAMES[] = {
1731         "spring",
1732         "friction",
1733         "damper",
1734         "inertia"
1735 };
1736
1737
1738 static u8 hidpp_ff_find_effect(struct hidpp_ff_private_data *data, int effect_id)
1739 {
1740         int i;
1741
1742         for (i = 0; i < data->num_effects; i++)
1743                 if (data->effect_ids[i] == effect_id)
1744                         return i+1;
1745
1746         return 0;
1747 }
1748
1749 static void hidpp_ff_work_handler(struct work_struct *w)
1750 {
1751         struct hidpp_ff_work_data *wd = container_of(w, struct hidpp_ff_work_data, work);
1752         struct hidpp_ff_private_data *data = wd->data;
1753         struct hidpp_report response;
1754         u8 slot;
1755         int ret;
1756
1757         /* add slot number if needed */
1758         switch (wd->effect_id) {
1759         case HIDPP_FF_EFFECTID_AUTOCENTER:
1760                 wd->params[0] = data->slot_autocenter;
1761                 break;
1762         case HIDPP_FF_EFFECTID_NONE:
1763                 /* leave slot as zero */
1764                 break;
1765         default:
1766                 /* find current slot for effect */
1767                 wd->params[0] = hidpp_ff_find_effect(data, wd->effect_id);
1768                 break;
1769         }
1770
1771         /* send command and wait for reply */
1772         ret = hidpp_send_fap_command_sync(data->hidpp, data->feature_index,
1773                 wd->command, wd->params, wd->size, &response);
1774
1775         if (ret) {
1776                 hid_err(data->hidpp->hid_dev, "Failed to send command to device!\n");
1777                 goto out;
1778         }
1779
1780         /* parse return data */
1781         switch (wd->command) {
1782         case HIDPP_FF_DOWNLOAD_EFFECT:
1783                 slot = response.fap.params[0];
1784                 if (slot > 0 && slot <= data->num_effects) {
1785                         if (wd->effect_id >= 0)
1786                                 /* regular effect uploaded */
1787                                 data->effect_ids[slot-1] = wd->effect_id;
1788                         else if (wd->effect_id >= HIDPP_FF_EFFECTID_AUTOCENTER)
1789                                 /* autocenter spring uploaded */
1790                                 data->slot_autocenter = slot;
1791                 }
1792                 break;
1793         case HIDPP_FF_DESTROY_EFFECT:
1794                 if (wd->effect_id >= 0)
1795                         /* regular effect destroyed */
1796                         data->effect_ids[wd->params[0]-1] = -1;
1797                 else if (wd->effect_id >= HIDPP_FF_EFFECTID_AUTOCENTER)
1798                         /* autocenter spring destoyed */
1799                         data->slot_autocenter = 0;
1800                 break;
1801         case HIDPP_FF_SET_GLOBAL_GAINS:
1802                 data->gain = (wd->params[0] << 8) + wd->params[1];
1803                 break;
1804         case HIDPP_FF_SET_APERTURE:
1805                 data->range = (wd->params[0] << 8) + wd->params[1];
1806                 break;
1807         default:
1808                 /* no action needed */
1809                 break;
1810         }
1811
1812 out:
1813         atomic_dec(&data->workqueue_size);
1814         kfree(wd);
1815 }
1816
1817 static int hidpp_ff_queue_work(struct hidpp_ff_private_data *data, int effect_id, u8 command, u8 *params, u8 size)
1818 {
1819         struct hidpp_ff_work_data *wd = kzalloc(sizeof(*wd), GFP_KERNEL);
1820         int s;
1821
1822         if (!wd)
1823                 return -ENOMEM;
1824
1825         INIT_WORK(&wd->work, hidpp_ff_work_handler);
1826
1827         wd->data = data;
1828         wd->effect_id = effect_id;
1829         wd->command = command;
1830         wd->size = size;
1831         memcpy(wd->params, params, size);
1832
1833         atomic_inc(&data->workqueue_size);
1834         queue_work(data->wq, &wd->work);
1835
1836         /* warn about excessive queue size */
1837         s = atomic_read(&data->workqueue_size);
1838         if (s >= 20 && s % 20 == 0)
1839                 hid_warn(data->hidpp->hid_dev, "Force feedback command queue contains %d commands, causing substantial delays!", s);
1840
1841         return 0;
1842 }
1843
1844 static int hidpp_ff_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
1845 {
1846         struct hidpp_ff_private_data *data = dev->ff->private;
1847         u8 params[20];
1848         u8 size;
1849         int force;
1850
1851         /* set common parameters */
1852         params[2] = effect->replay.length >> 8;
1853         params[3] = effect->replay.length & 255;
1854         params[4] = effect->replay.delay >> 8;
1855         params[5] = effect->replay.delay & 255;
1856
1857         switch (effect->type) {
1858         case FF_CONSTANT:
1859                 force = (effect->u.constant.level * fixp_sin16((effect->direction * 360) >> 16)) >> 15;
1860                 params[1] = HIDPP_FF_EFFECT_CONSTANT;
1861                 params[6] = force >> 8;
1862                 params[7] = force & 255;
1863                 params[8] = effect->u.constant.envelope.attack_level >> 7;
1864                 params[9] = effect->u.constant.envelope.attack_length >> 8;
1865                 params[10] = effect->u.constant.envelope.attack_length & 255;
1866                 params[11] = effect->u.constant.envelope.fade_level >> 7;
1867                 params[12] = effect->u.constant.envelope.fade_length >> 8;
1868                 params[13] = effect->u.constant.envelope.fade_length & 255;
1869                 size = 14;
1870                 dbg_hid("Uploading constant force level=%d in dir %d = %d\n",
1871                                 effect->u.constant.level,
1872                                 effect->direction, force);
1873                 dbg_hid("          envelope attack=(%d, %d ms) fade=(%d, %d ms)\n",
1874                                 effect->u.constant.envelope.attack_level,
1875                                 effect->u.constant.envelope.attack_length,
1876                                 effect->u.constant.envelope.fade_level,
1877                                 effect->u.constant.envelope.fade_length);
1878                 break;
1879         case FF_PERIODIC:
1880         {
1881                 switch (effect->u.periodic.waveform) {
1882                 case FF_SINE:
1883                         params[1] = HIDPP_FF_EFFECT_PERIODIC_SINE;
1884                         break;
1885                 case FF_SQUARE:
1886                         params[1] = HIDPP_FF_EFFECT_PERIODIC_SQUARE;
1887                         break;
1888                 case FF_SAW_UP:
1889                         params[1] = HIDPP_FF_EFFECT_PERIODIC_SAWTOOTHUP;
1890                         break;
1891                 case FF_SAW_DOWN:
1892                         params[1] = HIDPP_FF_EFFECT_PERIODIC_SAWTOOTHDOWN;
1893                         break;
1894                 case FF_TRIANGLE:
1895                         params[1] = HIDPP_FF_EFFECT_PERIODIC_TRIANGLE;
1896                         break;
1897                 default:
1898                         hid_err(data->hidpp->hid_dev, "Unexpected periodic waveform type %i!\n", effect->u.periodic.waveform);
1899                         return -EINVAL;
1900                 }
1901                 force = (effect->u.periodic.magnitude * fixp_sin16((effect->direction * 360) >> 16)) >> 15;
1902                 params[6] = effect->u.periodic.magnitude >> 8;
1903                 params[7] = effect->u.periodic.magnitude & 255;
1904                 params[8] = effect->u.periodic.offset >> 8;
1905                 params[9] = effect->u.periodic.offset & 255;
1906                 params[10] = effect->u.periodic.period >> 8;
1907                 params[11] = effect->u.periodic.period & 255;
1908                 params[12] = effect->u.periodic.phase >> 8;
1909                 params[13] = effect->u.periodic.phase & 255;
1910                 params[14] = effect->u.periodic.envelope.attack_level >> 7;
1911                 params[15] = effect->u.periodic.envelope.attack_length >> 8;
1912                 params[16] = effect->u.periodic.envelope.attack_length & 255;
1913                 params[17] = effect->u.periodic.envelope.fade_level >> 7;
1914                 params[18] = effect->u.periodic.envelope.fade_length >> 8;
1915                 params[19] = effect->u.periodic.envelope.fade_length & 255;
1916                 size = 20;
1917                 dbg_hid("Uploading periodic force mag=%d/dir=%d, offset=%d, period=%d ms, phase=%d\n",
1918                                 effect->u.periodic.magnitude, effect->direction,
1919                                 effect->u.periodic.offset,
1920                                 effect->u.periodic.period,
1921                                 effect->u.periodic.phase);
1922                 dbg_hid("          envelope attack=(%d, %d ms) fade=(%d, %d ms)\n",
1923                                 effect->u.periodic.envelope.attack_level,
1924                                 effect->u.periodic.envelope.attack_length,
1925                                 effect->u.periodic.envelope.fade_level,
1926                                 effect->u.periodic.envelope.fade_length);
1927                 break;
1928         }
1929         case FF_RAMP:
1930                 params[1] = HIDPP_FF_EFFECT_RAMP;
1931                 force = (effect->u.ramp.start_level * fixp_sin16((effect->direction * 360) >> 16)) >> 15;
1932                 params[6] = force >> 8;
1933                 params[7] = force & 255;
1934                 force = (effect->u.ramp.end_level * fixp_sin16((effect->direction * 360) >> 16)) >> 15;
1935                 params[8] = force >> 8;
1936                 params[9] = force & 255;
1937                 params[10] = effect->u.ramp.envelope.attack_level >> 7;
1938                 params[11] = effect->u.ramp.envelope.attack_length >> 8;
1939                 params[12] = effect->u.ramp.envelope.attack_length & 255;
1940                 params[13] = effect->u.ramp.envelope.fade_level >> 7;
1941                 params[14] = effect->u.ramp.envelope.fade_length >> 8;
1942                 params[15] = effect->u.ramp.envelope.fade_length & 255;
1943                 size = 16;
1944                 dbg_hid("Uploading ramp force level=%d -> %d in dir %d = %d\n",
1945                                 effect->u.ramp.start_level,
1946                                 effect->u.ramp.end_level,
1947                                 effect->direction, force);
1948                 dbg_hid("          envelope attack=(%d, %d ms) fade=(%d, %d ms)\n",
1949                                 effect->u.ramp.envelope.attack_level,
1950                                 effect->u.ramp.envelope.attack_length,
1951                                 effect->u.ramp.envelope.fade_level,
1952                                 effect->u.ramp.envelope.fade_length);
1953                 break;
1954         case FF_FRICTION:
1955         case FF_INERTIA:
1956         case FF_SPRING:
1957         case FF_DAMPER:
1958                 params[1] = HIDPP_FF_CONDITION_CMDS[effect->type - FF_SPRING];
1959                 params[6] = effect->u.condition[0].left_saturation >> 9;
1960                 params[7] = (effect->u.condition[0].left_saturation >> 1) & 255;
1961                 params[8] = effect->u.condition[0].left_coeff >> 8;
1962                 params[9] = effect->u.condition[0].left_coeff & 255;
1963                 params[10] = effect->u.condition[0].deadband >> 9;
1964                 params[11] = (effect->u.condition[0].deadband >> 1) & 255;
1965                 params[12] = effect->u.condition[0].center >> 8;
1966                 params[13] = effect->u.condition[0].center & 255;
1967                 params[14] = effect->u.condition[0].right_coeff >> 8;
1968                 params[15] = effect->u.condition[0].right_coeff & 255;
1969                 params[16] = effect->u.condition[0].right_saturation >> 9;
1970                 params[17] = (effect->u.condition[0].right_saturation >> 1) & 255;
1971                 size = 18;
1972                 dbg_hid("Uploading %s force left coeff=%d, left sat=%d, right coeff=%d, right sat=%d\n",
1973                                 HIDPP_FF_CONDITION_NAMES[effect->type - FF_SPRING],
1974                                 effect->u.condition[0].left_coeff,
1975                                 effect->u.condition[0].left_saturation,
1976                                 effect->u.condition[0].right_coeff,
1977                                 effect->u.condition[0].right_saturation);
1978                 dbg_hid("          deadband=%d, center=%d\n",
1979                                 effect->u.condition[0].deadband,
1980                                 effect->u.condition[0].center);
1981                 break;
1982         default:
1983                 hid_err(data->hidpp->hid_dev, "Unexpected force type %i!\n", effect->type);
1984                 return -EINVAL;
1985         }
1986
1987         return hidpp_ff_queue_work(data, effect->id, HIDPP_FF_DOWNLOAD_EFFECT, params, size);
1988 }
1989
1990 static int hidpp_ff_playback(struct input_dev *dev, int effect_id, int value)
1991 {
1992         struct hidpp_ff_private_data *data = dev->ff->private;
1993         u8 params[2];
1994
1995         params[1] = value ? HIDPP_FF_EFFECT_STATE_PLAY : HIDPP_FF_EFFECT_STATE_STOP;
1996
1997         dbg_hid("St%sing playback of effect %d.\n", value?"art":"opp", effect_id);
1998
1999         return hidpp_ff_queue_work(data, effect_id, HIDPP_FF_SET_EFFECT_STATE, params, ARRAY_SIZE(params));
2000 }
2001
2002 static int hidpp_ff_erase_effect(struct input_dev *dev, int effect_id)
2003 {
2004         struct hidpp_ff_private_data *data = dev->ff->private;
2005         u8 slot = 0;
2006
2007         dbg_hid("Erasing effect %d.\n", effect_id);
2008
2009         return hidpp_ff_queue_work(data, effect_id, HIDPP_FF_DESTROY_EFFECT, &slot, 1);
2010 }
2011
2012 static void hidpp_ff_set_autocenter(struct input_dev *dev, u16 magnitude)
2013 {
2014         struct hidpp_ff_private_data *data = dev->ff->private;
2015         u8 params[18];
2016
2017         dbg_hid("Setting autocenter to %d.\n", magnitude);
2018
2019         /* start a standard spring effect */
2020         params[1] = HIDPP_FF_EFFECT_SPRING | HIDPP_FF_EFFECT_AUTOSTART;
2021         /* zero delay and duration */
2022         params[2] = params[3] = params[4] = params[5] = 0;
2023         /* set coeff to 25% of saturation */
2024         params[8] = params[14] = magnitude >> 11;
2025         params[9] = params[15] = (magnitude >> 3) & 255;
2026         params[6] = params[16] = magnitude >> 9;
2027         params[7] = params[17] = (magnitude >> 1) & 255;
2028         /* zero deadband and center */
2029         params[10] = params[11] = params[12] = params[13] = 0;
2030
2031         hidpp_ff_queue_work(data, HIDPP_FF_EFFECTID_AUTOCENTER, HIDPP_FF_DOWNLOAD_EFFECT, params, ARRAY_SIZE(params));
2032 }
2033
2034 static void hidpp_ff_set_gain(struct input_dev *dev, u16 gain)
2035 {
2036         struct hidpp_ff_private_data *data = dev->ff->private;
2037         u8 params[4];
2038
2039         dbg_hid("Setting gain to %d.\n", gain);
2040
2041         params[0] = gain >> 8;
2042         params[1] = gain & 255;
2043         params[2] = 0; /* no boost */
2044         params[3] = 0;
2045
2046         hidpp_ff_queue_work(data, HIDPP_FF_EFFECTID_NONE, HIDPP_FF_SET_GLOBAL_GAINS, params, ARRAY_SIZE(params));
2047 }
2048
2049 static ssize_t hidpp_ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
2050 {
2051         struct hid_device *hid = to_hid_device(dev);
2052         struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
2053         struct input_dev *idev = hidinput->input;
2054         struct hidpp_ff_private_data *data = idev->ff->private;
2055
2056         return scnprintf(buf, PAGE_SIZE, "%u\n", data->range);
2057 }
2058
2059 static ssize_t hidpp_ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
2060 {
2061         struct hid_device *hid = to_hid_device(dev);
2062         struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
2063         struct input_dev *idev = hidinput->input;
2064         struct hidpp_ff_private_data *data = idev->ff->private;
2065         u8 params[2];
2066         int range = simple_strtoul(buf, NULL, 10);
2067
2068         range = clamp(range, 180, 900);
2069
2070         params[0] = range >> 8;
2071         params[1] = range & 0x00FF;
2072
2073         hidpp_ff_queue_work(data, -1, HIDPP_FF_SET_APERTURE, params, ARRAY_SIZE(params));
2074
2075         return count;
2076 }
2077
2078 static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, hidpp_ff_range_show, hidpp_ff_range_store);
2079
2080 static void hidpp_ff_destroy(struct ff_device *ff)
2081 {
2082         struct hidpp_ff_private_data *data = ff->private;
2083
2084         kfree(data->effect_ids);
2085 }
2086
2087 static int hidpp_ff_init(struct hidpp_device *hidpp, u8 feature_index)
2088 {
2089         struct hid_device *hid = hidpp->hid_dev;
2090         struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
2091         struct input_dev *dev = hidinput->input;
2092         const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
2093         const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
2094         struct ff_device *ff;
2095         struct hidpp_report response;
2096         struct hidpp_ff_private_data *data;
2097         int error, j, num_slots;
2098         u8 version;
2099
2100         if (!dev) {
2101                 hid_err(hid, "Struct input_dev not set!\n");
2102                 return -EINVAL;
2103         }
2104
2105         /* Get firmware release */
2106         version = bcdDevice & 255;
2107
2108         /* Set supported force feedback capabilities */
2109         for (j = 0; hidpp_ff_effects[j] >= 0; j++)
2110                 set_bit(hidpp_ff_effects[j], dev->ffbit);
2111         if (version > 1)
2112                 for (j = 0; hidpp_ff_effects_v2[j] >= 0; j++)
2113                         set_bit(hidpp_ff_effects_v2[j], dev->ffbit);
2114
2115         /* Read number of slots available in device */
2116         error = hidpp_send_fap_command_sync(hidpp, feature_index,
2117                 HIDPP_FF_GET_INFO, NULL, 0, &response);
2118         if (error) {
2119                 if (error < 0)
2120                         return error;
2121                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
2122                         __func__, error);
2123                 return -EPROTO;
2124         }
2125
2126         num_slots = response.fap.params[0] - HIDPP_FF_RESERVED_SLOTS;
2127
2128         error = input_ff_create(dev, num_slots);
2129
2130         if (error) {
2131                 hid_err(dev, "Failed to create FF device!\n");
2132                 return error;
2133         }
2134
2135         data = kzalloc(sizeof(*data), GFP_KERNEL);
2136         if (!data)
2137                 return -ENOMEM;
2138         data->effect_ids = kcalloc(num_slots, sizeof(int), GFP_KERNEL);
2139         if (!data->effect_ids) {
2140                 kfree(data);
2141                 return -ENOMEM;
2142         }
2143         data->wq = create_singlethread_workqueue("hidpp-ff-sendqueue");
2144         if (!data->wq) {
2145                 kfree(data->effect_ids);
2146                 kfree(data);
2147                 return -ENOMEM;
2148         }
2149
2150         data->hidpp = hidpp;
2151         data->feature_index = feature_index;
2152         data->version = version;
2153         data->slot_autocenter = 0;
2154         data->num_effects = num_slots;
2155         for (j = 0; j < num_slots; j++)
2156                 data->effect_ids[j] = -1;
2157
2158         ff = dev->ff;
2159         ff->private = data;
2160
2161         ff->upload = hidpp_ff_upload_effect;
2162         ff->erase = hidpp_ff_erase_effect;
2163         ff->playback = hidpp_ff_playback;
2164         ff->set_gain = hidpp_ff_set_gain;
2165         ff->set_autocenter = hidpp_ff_set_autocenter;
2166         ff->destroy = hidpp_ff_destroy;
2167
2168
2169         /* reset all forces */
2170         error = hidpp_send_fap_command_sync(hidpp, feature_index,
2171                 HIDPP_FF_RESET_ALL, NULL, 0, &response);
2172
2173         /* Read current Range */
2174         error = hidpp_send_fap_command_sync(hidpp, feature_index,
2175                 HIDPP_FF_GET_APERTURE, NULL, 0, &response);
2176         if (error)
2177                 hid_warn(hidpp->hid_dev, "Failed to read range from device!\n");
2178         data->range = error ? 900 : get_unaligned_be16(&response.fap.params[0]);
2179
2180         /* Create sysfs interface */
2181         error = device_create_file(&(hidpp->hid_dev->dev), &dev_attr_range);
2182         if (error)
2183                 hid_warn(hidpp->hid_dev, "Unable to create sysfs interface for \"range\", errno %d!\n", error);
2184
2185         /* Read the current gain values */
2186         error = hidpp_send_fap_command_sync(hidpp, feature_index,
2187                 HIDPP_FF_GET_GLOBAL_GAINS, NULL, 0, &response);
2188         if (error)
2189                 hid_warn(hidpp->hid_dev, "Failed to read gain values from device!\n");
2190         data->gain = error ? 0xffff : get_unaligned_be16(&response.fap.params[0]);
2191         /* ignore boost value at response.fap.params[2] */
2192
2193         /* init the hardware command queue */
2194         atomic_set(&data->workqueue_size, 0);
2195
2196         /* initialize with zero autocenter to get wheel in usable state */
2197         hidpp_ff_set_autocenter(dev, 0);
2198
2199         hid_info(hid, "Force feedback support loaded (firmware release %d).\n",
2200                  version);
2201
2202         return 0;
2203 }
2204
2205 static int hidpp_ff_deinit(struct hid_device *hid)
2206 {
2207         struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
2208         struct input_dev *dev = hidinput->input;
2209         struct hidpp_ff_private_data *data;
2210
2211         if (!dev) {
2212                 hid_err(hid, "Struct input_dev not found!\n");
2213                 return -EINVAL;
2214         }
2215
2216         hid_info(hid, "Unloading HID++ force feedback.\n");
2217         data = dev->ff->private;
2218         if (!data) {
2219                 hid_err(hid, "Private data not found!\n");
2220                 return -EINVAL;
2221         }
2222
2223         destroy_workqueue(data->wq);
2224         device_remove_file(&hid->dev, &dev_attr_range);
2225
2226         return 0;
2227 }
2228
2229
2230 /* ************************************************************************** */
2231 /*                                                                            */
2232 /* Device Support                                                             */
2233 /*                                                                            */
2234 /* ************************************************************************** */
2235
2236 /* -------------------------------------------------------------------------- */
2237 /* Touchpad HID++ devices                                                     */
2238 /* -------------------------------------------------------------------------- */
2239
2240 #define WTP_MANUAL_RESOLUTION                           39
2241
2242 struct wtp_data {
2243         u16 x_size, y_size;
2244         u8 finger_count;
2245         u8 mt_feature_index;
2246         u8 button_feature_index;
2247         u8 maxcontacts;
2248         bool flip_y;
2249         unsigned int resolution;
2250 };
2251
2252 static int wtp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
2253                 struct hid_field *field, struct hid_usage *usage,
2254                 unsigned long **bit, int *max)
2255 {
2256         return -1;
2257 }
2258
2259 static void wtp_populate_input(struct hidpp_device *hidpp,
2260                                struct input_dev *input_dev)
2261 {
2262         struct wtp_data *wd = hidpp->private_data;
2263
2264         __set_bit(EV_ABS, input_dev->evbit);
2265         __set_bit(EV_KEY, input_dev->evbit);
2266         __clear_bit(EV_REL, input_dev->evbit);
2267         __clear_bit(EV_LED, input_dev->evbit);
2268
2269         input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, wd->x_size, 0, 0);
2270         input_abs_set_res(input_dev, ABS_MT_POSITION_X, wd->resolution);
2271         input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, wd->y_size, 0, 0);
2272         input_abs_set_res(input_dev, ABS_MT_POSITION_Y, wd->resolution);
2273
2274         /* Max pressure is not given by the devices, pick one */
2275         input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 50, 0, 0);
2276
2277         input_set_capability(input_dev, EV_KEY, BTN_LEFT);
2278
2279         if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS)
2280                 input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
2281         else
2282                 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
2283
2284         input_mt_init_slots(input_dev, wd->maxcontacts, INPUT_MT_POINTER |
2285                 INPUT_MT_DROP_UNUSED);
2286 }
2287
2288 static void wtp_touch_event(struct hidpp_device *hidpp,
2289         struct hidpp_touchpad_raw_xy_finger *touch_report)
2290 {
2291         struct wtp_data *wd = hidpp->private_data;
2292         int slot;
2293
2294         if (!touch_report->finger_id || touch_report->contact_type)
2295                 /* no actual data */
2296                 return;
2297
2298         slot = input_mt_get_slot_by_key(hidpp->input, touch_report->finger_id);
2299
2300         input_mt_slot(hidpp->input, slot);
2301         input_mt_report_slot_state(hidpp->input, MT_TOOL_FINGER,
2302                                         touch_report->contact_status);
2303         if (touch_report->contact_status) {
2304                 input_event(hidpp->input, EV_ABS, ABS_MT_POSITION_X,
2305                                 touch_report->x);
2306                 input_event(hidpp->input, EV_ABS, ABS_MT_POSITION_Y,
2307                                 wd->flip_y ? wd->y_size - touch_report->y :
2308                                              touch_report->y);
2309                 input_event(hidpp->input, EV_ABS, ABS_MT_PRESSURE,
2310                                 touch_report->area);
2311         }
2312 }
2313
2314 static void wtp_send_raw_xy_event(struct hidpp_device *hidpp,
2315                 struct hidpp_touchpad_raw_xy *raw)
2316 {
2317         int i;
2318
2319         for (i = 0; i < 2; i++)
2320                 wtp_touch_event(hidpp, &(raw->fingers[i]));
2321
2322         if (raw->end_of_frame &&
2323             !(hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS))
2324                 input_event(hidpp->input, EV_KEY, BTN_LEFT, raw->button);
2325
2326         if (raw->end_of_frame || raw->finger_count <= 2) {
2327                 input_mt_sync_frame(hidpp->input);
2328                 input_sync(hidpp->input);
2329         }
2330 }
2331
2332 static int wtp_mouse_raw_xy_event(struct hidpp_device *hidpp, u8 *data)
2333 {
2334         struct wtp_data *wd = hidpp->private_data;
2335         u8 c1_area = ((data[7] & 0xf) * (data[7] & 0xf) +
2336                       (data[7] >> 4) * (data[7] >> 4)) / 2;
2337         u8 c2_area = ((data[13] & 0xf) * (data[13] & 0xf) +
2338                       (data[13] >> 4) * (data[13] >> 4)) / 2;
2339         struct hidpp_touchpad_raw_xy raw = {
2340                 .timestamp = data[1],
2341                 .fingers = {
2342                         {
2343                                 .contact_type = 0,
2344                                 .contact_status = !!data[7],
2345                                 .x = get_unaligned_le16(&data[3]),
2346                                 .y = get_unaligned_le16(&data[5]),
2347                                 .z = c1_area,
2348                                 .area = c1_area,
2349                                 .finger_id = data[2],
2350                         }, {
2351                                 .contact_type = 0,
2352                                 .contact_status = !!data[13],
2353                                 .x = get_unaligned_le16(&data[9]),
2354                                 .y = get_unaligned_le16(&data[11]),
2355                                 .z = c2_area,
2356                                 .area = c2_area,
2357                                 .finger_id = data[8],
2358                         }
2359                 },
2360                 .finger_count = wd->maxcontacts,
2361                 .spurious_flag = 0,
2362                 .end_of_frame = (data[0] >> 7) == 0,
2363                 .button = data[0] & 0x01,
2364         };
2365
2366         wtp_send_raw_xy_event(hidpp, &raw);
2367
2368         return 1;
2369 }
2370
2371 static int wtp_raw_event(struct hid_device *hdev, u8 *data, int size)
2372 {
2373         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2374         struct wtp_data *wd = hidpp->private_data;
2375         struct hidpp_report *report = (struct hidpp_report *)data;
2376         struct hidpp_touchpad_raw_xy raw;
2377
2378         if (!wd || !hidpp->input)
2379                 return 1;
2380
2381         switch (data[0]) {
2382         case 0x02:
2383                 if (size < 2) {
2384                         hid_err(hdev, "Received HID report of bad size (%d)",
2385                                 size);
2386                         return 1;
2387                 }
2388                 if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS) {
2389                         input_event(hidpp->input, EV_KEY, BTN_LEFT,
2390                                         !!(data[1] & 0x01));
2391                         input_event(hidpp->input, EV_KEY, BTN_RIGHT,
2392                                         !!(data[1] & 0x02));
2393                         input_sync(hidpp->input);
2394                         return 0;
2395                 } else {
2396                         if (size < 21)
2397                                 return 1;
2398                         return wtp_mouse_raw_xy_event(hidpp, &data[7]);
2399                 }
2400         case REPORT_ID_HIDPP_LONG:
2401                 /* size is already checked in hidpp_raw_event. */
2402                 if ((report->fap.feature_index != wd->mt_feature_index) ||
2403                     (report->fap.funcindex_clientid != EVENT_TOUCHPAD_RAW_XY))
2404                         return 1;
2405                 hidpp_touchpad_raw_xy_event(hidpp, data + 4, &raw);
2406
2407                 wtp_send_raw_xy_event(hidpp, &raw);
2408                 return 0;
2409         }
2410
2411         return 0;
2412 }
2413
2414 static int wtp_get_config(struct hidpp_device *hidpp)
2415 {
2416         struct wtp_data *wd = hidpp->private_data;
2417         struct hidpp_touchpad_raw_info raw_info = {0};
2418         u8 feature_type;
2419         int ret;
2420
2421         ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_TOUCHPAD_RAW_XY,
2422                 &wd->mt_feature_index, &feature_type);
2423         if (ret)
2424                 /* means that the device is not powered up */
2425                 return ret;
2426
2427         ret = hidpp_touchpad_get_raw_info(hidpp, wd->mt_feature_index,
2428                 &raw_info);
2429         if (ret)
2430                 return ret;
2431
2432         wd->x_size = raw_info.x_size;
2433         wd->y_size = raw_info.y_size;
2434         wd->maxcontacts = raw_info.maxcontacts;
2435         wd->flip_y = raw_info.origin == TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT;
2436         wd->resolution = raw_info.res;
2437         if (!wd->resolution)
2438                 wd->resolution = WTP_MANUAL_RESOLUTION;
2439
2440         return 0;
2441 }
2442
2443 static int wtp_allocate(struct hid_device *hdev, const struct hid_device_id *id)
2444 {
2445         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2446         struct wtp_data *wd;
2447
2448         wd = devm_kzalloc(&hdev->dev, sizeof(struct wtp_data),
2449                         GFP_KERNEL);
2450         if (!wd)
2451                 return -ENOMEM;
2452
2453         hidpp->private_data = wd;
2454
2455         return 0;
2456 };
2457
2458 static int wtp_connect(struct hid_device *hdev, bool connected)
2459 {
2460         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2461         struct wtp_data *wd = hidpp->private_data;
2462         int ret;
2463
2464         if (!wd->x_size) {
2465                 ret = wtp_get_config(hidpp);
2466                 if (ret) {
2467                         hid_err(hdev, "Can not get wtp config: %d\n", ret);
2468                         return ret;
2469                 }
2470         }
2471
2472         return hidpp_touchpad_set_raw_report_state(hidpp, wd->mt_feature_index,
2473                         true, true);
2474 }
2475
2476 /* ------------------------------------------------------------------------- */
2477 /* Logitech M560 devices                                                     */
2478 /* ------------------------------------------------------------------------- */
2479
2480 /*
2481  * Logitech M560 protocol overview
2482  *
2483  * The Logitech M560 mouse, is designed for windows 8. When the middle and/or
2484  * the sides buttons are pressed, it sends some keyboard keys events
2485  * instead of buttons ones.
2486  * To complicate things further, the middle button keys sequence
2487  * is different from the odd press and the even press.
2488  *
2489  * forward button -> Super_R
2490  * backward button -> Super_L+'d' (press only)
2491  * middle button -> 1st time: Alt_L+SuperL+XF86TouchpadOff (press only)
2492  *                  2nd time: left-click (press only)
2493  * NB: press-only means that when the button is pressed, the
2494  * KeyPress/ButtonPress and KeyRelease/ButtonRelease events are generated
2495  * together sequentially; instead when the button is released, no event is
2496  * generated !
2497  *
2498  * With the command
2499  *      10<xx>0a 3500af03 (where <xx> is the mouse id),
2500  * the mouse reacts differently:
2501  * - it never sends a keyboard key event
2502  * - for the three mouse button it sends:
2503  *      middle button               press   11<xx>0a 3500af00...
2504  *      side 1 button (forward)     press   11<xx>0a 3500b000...
2505  *      side 2 button (backward)    press   11<xx>0a 3500ae00...
2506  *      middle/side1/side2 button   release 11<xx>0a 35000000...
2507  */
2508
2509 static const u8 m560_config_parameter[] = {0x00, 0xaf, 0x03};
2510
2511 /* how buttons are mapped in the report */
2512 #define M560_MOUSE_BTN_LEFT             0x01
2513 #define M560_MOUSE_BTN_RIGHT            0x02
2514 #define M560_MOUSE_BTN_WHEEL_LEFT       0x08
2515 #define M560_MOUSE_BTN_WHEEL_RIGHT      0x10
2516
2517 #define M560_SUB_ID                     0x0a
2518 #define M560_BUTTON_MODE_REGISTER       0x35
2519
2520 static int m560_send_config_command(struct hid_device *hdev, bool connected)
2521 {
2522         struct hidpp_report response;
2523         struct hidpp_device *hidpp_dev;
2524
2525         hidpp_dev = hid_get_drvdata(hdev);
2526
2527         return hidpp_send_rap_command_sync(
2528                 hidpp_dev,
2529                 REPORT_ID_HIDPP_SHORT,
2530                 M560_SUB_ID,
2531                 M560_BUTTON_MODE_REGISTER,
2532                 (u8 *)m560_config_parameter,
2533                 sizeof(m560_config_parameter),
2534                 &response
2535         );
2536 }
2537
2538 static int m560_raw_event(struct hid_device *hdev, u8 *data, int size)
2539 {
2540         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2541
2542         /* sanity check */
2543         if (!hidpp->input) {
2544                 hid_err(hdev, "error in parameter\n");
2545                 return -EINVAL;
2546         }
2547
2548         if (size < 7) {
2549                 hid_err(hdev, "error in report\n");
2550                 return 0;
2551         }
2552
2553         if (data[0] == REPORT_ID_HIDPP_LONG &&
2554             data[2] == M560_SUB_ID && data[6] == 0x00) {
2555                 /*
2556                  * m560 mouse report for middle, forward and backward button
2557                  *
2558                  * data[0] = 0x11
2559                  * data[1] = device-id
2560                  * data[2] = 0x0a
2561                  * data[5] = 0xaf -> middle
2562                  *           0xb0 -> forward
2563                  *           0xae -> backward
2564                  *           0x00 -> release all
2565                  * data[6] = 0x00
2566                  */
2567
2568                 switch (data[5]) {
2569                 case 0xaf:
2570                         input_report_key(hidpp->input, BTN_MIDDLE, 1);
2571                         break;
2572                 case 0xb0:
2573                         input_report_key(hidpp->input, BTN_FORWARD, 1);
2574                         break;
2575                 case 0xae:
2576                         input_report_key(hidpp->input, BTN_BACK, 1);
2577                         break;
2578                 case 0x00:
2579                         input_report_key(hidpp->input, BTN_BACK, 0);
2580                         input_report_key(hidpp->input, BTN_FORWARD, 0);
2581                         input_report_key(hidpp->input, BTN_MIDDLE, 0);
2582                         break;
2583                 default:
2584                         hid_err(hdev, "error in report\n");
2585                         return 0;
2586                 }
2587                 input_sync(hidpp->input);
2588
2589         } else if (data[0] == 0x02) {
2590                 /*
2591                  * Logitech M560 mouse report
2592                  *
2593                  * data[0] = type (0x02)
2594                  * data[1..2] = buttons
2595                  * data[3..5] = xy
2596                  * data[6] = wheel
2597                  */
2598
2599                 int v;
2600
2601                 input_report_key(hidpp->input, BTN_LEFT,
2602                         !!(data[1] & M560_MOUSE_BTN_LEFT));
2603                 input_report_key(hidpp->input, BTN_RIGHT,
2604                         !!(data[1] & M560_MOUSE_BTN_RIGHT));
2605
2606                 if (data[1] & M560_MOUSE_BTN_WHEEL_LEFT) {
2607                         input_report_rel(hidpp->input, REL_HWHEEL, -1);
2608                         input_report_rel(hidpp->input, REL_HWHEEL_HI_RES,
2609                                          -120);
2610                 } else if (data[1] & M560_MOUSE_BTN_WHEEL_RIGHT) {
2611                         input_report_rel(hidpp->input, REL_HWHEEL, 1);
2612                         input_report_rel(hidpp->input, REL_HWHEEL_HI_RES,
2613                                          120);
2614                 }
2615
2616                 v = hid_snto32(hid_field_extract(hdev, data+3, 0, 12), 12);
2617                 input_report_rel(hidpp->input, REL_X, v);
2618
2619                 v = hid_snto32(hid_field_extract(hdev, data+3, 12, 12), 12);
2620                 input_report_rel(hidpp->input, REL_Y, v);
2621
2622                 v = hid_snto32(data[6], 8);
2623                 if (v != 0)
2624                         hidpp_scroll_counter_handle_scroll(hidpp->input,
2625                                         &hidpp->vertical_wheel_counter, v);
2626
2627                 input_sync(hidpp->input);
2628         }
2629
2630         return 1;
2631 }
2632
2633 static void m560_populate_input(struct hidpp_device *hidpp,
2634                                 struct input_dev *input_dev)
2635 {
2636         __set_bit(EV_KEY, input_dev->evbit);
2637         __set_bit(BTN_MIDDLE, input_dev->keybit);
2638         __set_bit(BTN_RIGHT, input_dev->keybit);
2639         __set_bit(BTN_LEFT, input_dev->keybit);
2640         __set_bit(BTN_BACK, input_dev->keybit);
2641         __set_bit(BTN_FORWARD, input_dev->keybit);
2642
2643         __set_bit(EV_REL, input_dev->evbit);
2644         __set_bit(REL_X, input_dev->relbit);
2645         __set_bit(REL_Y, input_dev->relbit);
2646         __set_bit(REL_WHEEL, input_dev->relbit);
2647         __set_bit(REL_HWHEEL, input_dev->relbit);
2648         __set_bit(REL_WHEEL_HI_RES, input_dev->relbit);
2649         __set_bit(REL_HWHEEL_HI_RES, input_dev->relbit);
2650 }
2651
2652 static int m560_input_mapping(struct hid_device *hdev, struct hid_input *hi,
2653                 struct hid_field *field, struct hid_usage *usage,
2654                 unsigned long **bit, int *max)
2655 {
2656         return -1;
2657 }
2658
2659 /* ------------------------------------------------------------------------- */
2660 /* Logitech K400 devices                                                     */
2661 /* ------------------------------------------------------------------------- */
2662
2663 /*
2664  * The Logitech K400 keyboard has an embedded touchpad which is seen
2665  * as a mouse from the OS point of view. There is a hardware shortcut to disable
2666  * tap-to-click but the setting is not remembered accross reset, annoying some
2667  * users.
2668  *
2669  * We can toggle this feature from the host by using the feature 0x6010:
2670  * Touchpad FW items
2671  */
2672
2673 struct k400_private_data {
2674         u8 feature_index;
2675 };
2676
2677 static int k400_disable_tap_to_click(struct hidpp_device *hidpp)
2678 {
2679         struct k400_private_data *k400 = hidpp->private_data;
2680         struct hidpp_touchpad_fw_items items = {};
2681         int ret;
2682         u8 feature_type;
2683
2684         if (!k400->feature_index) {
2685                 ret = hidpp_root_get_feature(hidpp,
2686                         HIDPP_PAGE_TOUCHPAD_FW_ITEMS,
2687                         &k400->feature_index, &feature_type);
2688                 if (ret)
2689                         /* means that the device is not powered up */
2690                         return ret;
2691         }
2692
2693         ret = hidpp_touchpad_fw_items_set(hidpp, k400->feature_index, &items);
2694         if (ret)
2695                 return ret;
2696
2697         return 0;
2698 }
2699
2700 static int k400_allocate(struct hid_device *hdev)
2701 {
2702         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2703         struct k400_private_data *k400;
2704
2705         k400 = devm_kzalloc(&hdev->dev, sizeof(struct k400_private_data),
2706                             GFP_KERNEL);
2707         if (!k400)
2708                 return -ENOMEM;
2709
2710         hidpp->private_data = k400;
2711
2712         return 0;
2713 };
2714
2715 static int k400_connect(struct hid_device *hdev, bool connected)
2716 {
2717         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2718
2719         if (!disable_tap_to_click)
2720                 return 0;
2721
2722         return k400_disable_tap_to_click(hidpp);
2723 }
2724
2725 /* ------------------------------------------------------------------------- */
2726 /* Logitech G920 Driving Force Racing Wheel for Xbox One                     */
2727 /* ------------------------------------------------------------------------- */
2728
2729 #define HIDPP_PAGE_G920_FORCE_FEEDBACK                  0x8123
2730
2731 static int g920_get_config(struct hidpp_device *hidpp)
2732 {
2733         u8 feature_type;
2734         u8 feature_index;
2735         int ret;
2736
2737         /* Find feature and store for later use */
2738         ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_G920_FORCE_FEEDBACK,
2739                 &feature_index, &feature_type);
2740         if (ret)
2741                 return ret;
2742
2743         ret = hidpp_ff_init(hidpp, feature_index);
2744         if (ret)
2745                 hid_warn(hidpp->hid_dev, "Unable to initialize force feedback support, errno %d\n",
2746                                 ret);
2747
2748         return 0;
2749 }
2750
2751 /* -------------------------------------------------------------------------- */
2752 /* HID++1.0 devices which use HID++ reports for their wheels                  */
2753 /* -------------------------------------------------------------------------- */
2754 static int hidpp10_wheel_connect(struct hidpp_device *hidpp)
2755 {
2756         return hidpp10_set_register(hidpp, HIDPP_REG_ENABLE_REPORTS, 0,
2757                         HIDPP_ENABLE_WHEEL_REPORT | HIDPP_ENABLE_HWHEEL_REPORT,
2758                         HIDPP_ENABLE_WHEEL_REPORT | HIDPP_ENABLE_HWHEEL_REPORT);
2759 }
2760
2761 static int hidpp10_wheel_raw_event(struct hidpp_device *hidpp,
2762                                    u8 *data, int size)
2763 {
2764         s8 value, hvalue;
2765
2766         if (!hidpp->input)
2767                 return -EINVAL;
2768
2769         if (size < 7)
2770                 return 0;
2771
2772         if (data[0] != REPORT_ID_HIDPP_SHORT || data[2] != HIDPP_SUB_ID_ROLLER)
2773                 return 0;
2774
2775         value = data[3];
2776         hvalue = data[4];
2777
2778         input_report_rel(hidpp->input, REL_WHEEL, value);
2779         input_report_rel(hidpp->input, REL_WHEEL_HI_RES, value * 120);
2780         input_report_rel(hidpp->input, REL_HWHEEL, hvalue);
2781         input_report_rel(hidpp->input, REL_HWHEEL_HI_RES, hvalue * 120);
2782         input_sync(hidpp->input);
2783
2784         return 1;
2785 }
2786
2787 static void hidpp10_wheel_populate_input(struct hidpp_device *hidpp,
2788                                          struct input_dev *input_dev)
2789 {
2790         __set_bit(EV_REL, input_dev->evbit);
2791         __set_bit(REL_WHEEL, input_dev->relbit);
2792         __set_bit(REL_WHEEL_HI_RES, input_dev->relbit);
2793         __set_bit(REL_HWHEEL, input_dev->relbit);
2794         __set_bit(REL_HWHEEL_HI_RES, input_dev->relbit);
2795 }
2796
2797 /* -------------------------------------------------------------------------- */
2798 /* HID++1.0 mice which use HID++ reports for extra mouse buttons              */
2799 /* -------------------------------------------------------------------------- */
2800 static int hidpp10_extra_mouse_buttons_connect(struct hidpp_device *hidpp)
2801 {
2802         return hidpp10_set_register(hidpp, HIDPP_REG_ENABLE_REPORTS, 0,
2803                                     HIDPP_ENABLE_MOUSE_EXTRA_BTN_REPORT,
2804                                     HIDPP_ENABLE_MOUSE_EXTRA_BTN_REPORT);
2805 }
2806
2807 static int hidpp10_extra_mouse_buttons_raw_event(struct hidpp_device *hidpp,
2808                                     u8 *data, int size)
2809 {
2810         int i;
2811
2812         if (!hidpp->input)
2813                 return -EINVAL;
2814
2815         if (size < 7)
2816                 return 0;
2817
2818         if (data[0] != REPORT_ID_HIDPP_SHORT ||
2819             data[2] != HIDPP_SUB_ID_MOUSE_EXTRA_BTNS)
2820                 return 0;
2821
2822         /*
2823          * Buttons are either delivered through the regular mouse report *or*
2824          * through the extra buttons report. At least for button 6 how it is
2825          * delivered differs per receiver firmware version. Even receivers with
2826          * the same usb-id show different behavior, so we handle both cases.
2827          */
2828         for (i = 0; i < 8; i++)
2829                 input_report_key(hidpp->input, BTN_MOUSE + i,
2830                                  (data[3] & (1 << i)));
2831
2832         /* Some mice report events on button 9+, use BTN_MISC */
2833         for (i = 0; i < 8; i++)
2834                 input_report_key(hidpp->input, BTN_MISC + i,
2835                                  (data[4] & (1 << i)));
2836
2837         input_sync(hidpp->input);
2838         return 1;
2839 }
2840
2841 static void hidpp10_extra_mouse_buttons_populate_input(
2842                         struct hidpp_device *hidpp, struct input_dev *input_dev)
2843 {
2844         /* BTN_MOUSE - BTN_MOUSE+7 are set already by the descriptor */
2845         __set_bit(BTN_0, input_dev->keybit);
2846         __set_bit(BTN_1, input_dev->keybit);
2847         __set_bit(BTN_2, input_dev->keybit);
2848         __set_bit(BTN_3, input_dev->keybit);
2849         __set_bit(BTN_4, input_dev->keybit);
2850         __set_bit(BTN_5, input_dev->keybit);
2851         __set_bit(BTN_6, input_dev->keybit);
2852         __set_bit(BTN_7, input_dev->keybit);
2853 }
2854
2855 /* -------------------------------------------------------------------------- */
2856 /* HID++1.0 kbds which only report 0x10xx consumer usages through sub-id 0x03 */
2857 /* -------------------------------------------------------------------------- */
2858
2859 /* Find the consumer-page input report desc and change Maximums to 0x107f */
2860 static u8 *hidpp10_consumer_keys_report_fixup(struct hidpp_device *hidpp,
2861                                               u8 *_rdesc, unsigned int *rsize)
2862 {
2863         /* Note 0 terminated so we can use strnstr to search for this. */
2864         static const char consumer_rdesc_start[] = {
2865                 0x05, 0x0C,     /* USAGE_PAGE (Consumer Devices)       */
2866                 0x09, 0x01,     /* USAGE (Consumer Control)            */
2867                 0xA1, 0x01,     /* COLLECTION (Application)            */
2868                 0x85, 0x03,     /* REPORT_ID = 3                       */
2869                 0x75, 0x10,     /* REPORT_SIZE (16)                    */
2870                 0x95, 0x02,     /* REPORT_COUNT (2)                    */
2871                 0x15, 0x01,     /* LOGICAL_MIN (1)                     */
2872                 0x26, 0x00      /* LOGICAL_MAX (...                    */
2873         };
2874         char *consumer_rdesc, *rdesc = (char *)_rdesc;
2875         unsigned int size;
2876
2877         consumer_rdesc = strnstr(rdesc, consumer_rdesc_start, *rsize);
2878         size = *rsize - (consumer_rdesc - rdesc);
2879         if (consumer_rdesc && size >= 25) {
2880                 consumer_rdesc[15] = 0x7f;
2881                 consumer_rdesc[16] = 0x10;
2882                 consumer_rdesc[20] = 0x7f;
2883                 consumer_rdesc[21] = 0x10;
2884         }
2885         return _rdesc;
2886 }
2887
2888 static int hidpp10_consumer_keys_connect(struct hidpp_device *hidpp)
2889 {
2890         return hidpp10_set_register(hidpp, HIDPP_REG_ENABLE_REPORTS, 0,
2891                                     HIDPP_ENABLE_CONSUMER_REPORT,
2892                                     HIDPP_ENABLE_CONSUMER_REPORT);
2893 }
2894
2895 static int hidpp10_consumer_keys_raw_event(struct hidpp_device *hidpp,
2896                                            u8 *data, int size)
2897 {
2898         u8 consumer_report[5];
2899
2900         if (size < 7)
2901                 return 0;
2902
2903         if (data[0] != REPORT_ID_HIDPP_SHORT ||
2904             data[2] != HIDPP_SUB_ID_CONSUMER_VENDOR_KEYS)
2905                 return 0;
2906
2907         /*
2908          * Build a normal consumer report (3) out of the data, this detour
2909          * is necessary to get some keyboards to report their 0x10xx usages.
2910          */
2911         consumer_report[0] = 0x03;
2912         memcpy(&consumer_report[1], &data[3], 4);
2913         /* We are called from atomic context */
2914         hid_report_raw_event(hidpp->hid_dev, HID_INPUT_REPORT,
2915                              consumer_report, 5, 1);
2916
2917         return 1;
2918 }
2919
2920 /* -------------------------------------------------------------------------- */
2921 /* High-resolution scroll wheels                                              */
2922 /* -------------------------------------------------------------------------- */
2923
2924 static int hi_res_scroll_enable(struct hidpp_device *hidpp)
2925 {
2926         int ret;
2927         u8 multiplier = 1;
2928
2929         if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_X2121) {
2930                 ret = hidpp_hrw_set_wheel_mode(hidpp, false, true, false);
2931                 if (ret == 0)
2932                         ret = hidpp_hrw_get_wheel_capability(hidpp, &multiplier);
2933         } else if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_X2120) {
2934                 ret = hidpp_hrs_set_highres_scrolling_mode(hidpp, true,
2935                                                            &multiplier);
2936         } else /* if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_1P0) */ {
2937                 ret = hidpp10_enable_scrolling_acceleration(hidpp);
2938                 multiplier = 8;
2939         }
2940         if (ret)
2941                 return ret;
2942
2943         if (multiplier == 0)
2944                 multiplier = 1;
2945
2946         hidpp->vertical_wheel_counter.wheel_multiplier = multiplier;
2947         hid_info(hidpp->hid_dev, "multiplier = %d\n", multiplier);
2948         return 0;
2949 }
2950
2951 /* -------------------------------------------------------------------------- */
2952 /* Generic HID++ devices                                                      */
2953 /* -------------------------------------------------------------------------- */
2954
2955 static u8 *hidpp_report_fixup(struct hid_device *hdev, u8 *rdesc,
2956                               unsigned int *rsize)
2957 {
2958         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2959
2960         if (!hidpp)
2961                 return rdesc;
2962
2963         /* For 27 MHz keyboards the quirk gets set after hid_parse. */
2964         if (hdev->group == HID_GROUP_LOGITECH_27MHZ_DEVICE ||
2965             (hidpp->quirks & HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS))
2966                 rdesc = hidpp10_consumer_keys_report_fixup(hidpp, rdesc, rsize);
2967
2968         return rdesc;
2969 }
2970
2971 static int hidpp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
2972                 struct hid_field *field, struct hid_usage *usage,
2973                 unsigned long **bit, int *max)
2974 {
2975         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2976
2977         if (!hidpp)
2978                 return 0;
2979
2980         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
2981                 return wtp_input_mapping(hdev, hi, field, usage, bit, max);
2982         else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560 &&
2983                         field->application != HID_GD_MOUSE)
2984                 return m560_input_mapping(hdev, hi, field, usage, bit, max);
2985
2986         return 0;
2987 }
2988
2989 static int hidpp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
2990                 struct hid_field *field, struct hid_usage *usage,
2991                 unsigned long **bit, int *max)
2992 {
2993         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
2994
2995         if (!hidpp)
2996                 return 0;
2997
2998         /* Ensure that Logitech G920 is not given a default fuzz/flat value */
2999         if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
3000                 if (usage->type == EV_ABS && (usage->code == ABS_X ||
3001                                 usage->code == ABS_Y || usage->code == ABS_Z ||
3002                                 usage->code == ABS_RZ)) {
3003                         field->application = HID_GD_MULTIAXIS;
3004                 }
3005         }
3006
3007         return 0;
3008 }
3009
3010
3011 static void hidpp_populate_input(struct hidpp_device *hidpp,
3012                                  struct input_dev *input)
3013 {
3014         hidpp->input = input;
3015
3016         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
3017                 wtp_populate_input(hidpp, input);
3018         else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560)
3019                 m560_populate_input(hidpp, input);
3020
3021         if (hidpp->quirks & HIDPP_QUIRK_HIDPP_WHEELS)
3022                 hidpp10_wheel_populate_input(hidpp, input);
3023
3024         if (hidpp->quirks & HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS)
3025                 hidpp10_extra_mouse_buttons_populate_input(hidpp, input);
3026 }
3027
3028 static int hidpp_input_configured(struct hid_device *hdev,
3029                                 struct hid_input *hidinput)
3030 {
3031         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
3032         struct input_dev *input = hidinput->input;
3033
3034         if (!hidpp)
3035                 return 0;
3036
3037         hidpp_populate_input(hidpp, input);
3038
3039         return 0;
3040 }
3041
3042 static int hidpp_raw_hidpp_event(struct hidpp_device *hidpp, u8 *data,
3043                 int size)
3044 {
3045         struct hidpp_report *question = hidpp->send_receive_buf;
3046         struct hidpp_report *answer = hidpp->send_receive_buf;
3047         struct hidpp_report *report = (struct hidpp_report *)data;
3048         int ret;
3049
3050         /*
3051          * If the mutex is locked then we have a pending answer from a
3052          * previously sent command.
3053          */
3054         if (unlikely(mutex_is_locked(&hidpp->send_mutex))) {
3055                 /*
3056                  * Check for a correct hidpp20 answer or the corresponding
3057                  * error
3058                  */
3059                 if (hidpp_match_answer(question, report) ||
3060                                 hidpp_match_error(question, report)) {
3061                         *answer = *report;
3062                         hidpp->answer_available = true;
3063                         wake_up(&hidpp->wait);
3064                         /*
3065                          * This was an answer to a command that this driver sent
3066                          * We return 1 to hid-core to avoid forwarding the
3067                          * command upstream as it has been treated by the driver
3068                          */
3069
3070                         return 1;
3071                 }
3072         }
3073
3074         if (unlikely(hidpp_report_is_connect_event(report))) {
3075                 atomic_set(&hidpp->connected,
3076                                 !(report->rap.params[0] & (1 << 6)));
3077                 if (schedule_work(&hidpp->work) == 0)
3078                         dbg_hid("%s: connect event already queued\n", __func__);
3079                 return 1;
3080         }
3081
3082         if (hidpp->capabilities & HIDPP_CAPABILITY_HIDPP20_BATTERY) {
3083                 ret = hidpp20_battery_event(hidpp, data, size);
3084                 if (ret != 0)
3085                         return ret;
3086                 ret = hidpp_solar_battery_event(hidpp, data, size);
3087                 if (ret != 0)
3088                         return ret;
3089         }
3090
3091         if (hidpp->capabilities & HIDPP_CAPABILITY_HIDPP10_BATTERY) {
3092                 ret = hidpp10_battery_event(hidpp, data, size);
3093                 if (ret != 0)
3094                         return ret;
3095         }
3096
3097         if (hidpp->quirks & HIDPP_QUIRK_HIDPP_WHEELS) {
3098                 ret = hidpp10_wheel_raw_event(hidpp, data, size);
3099                 if (ret != 0)
3100                         return ret;
3101         }
3102
3103         if (hidpp->quirks & HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS) {
3104                 ret = hidpp10_extra_mouse_buttons_raw_event(hidpp, data, size);
3105                 if (ret != 0)
3106                         return ret;
3107         }
3108
3109         if (hidpp->quirks & HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS) {
3110                 ret = hidpp10_consumer_keys_raw_event(hidpp, data, size);
3111                 if (ret != 0)
3112                         return ret;
3113         }
3114
3115         return 0;
3116 }
3117
3118 static int hidpp_raw_event(struct hid_device *hdev, struct hid_report *report,
3119                 u8 *data, int size)
3120 {
3121         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
3122         int ret = 0;
3123
3124         if (!hidpp)
3125                 return 0;
3126
3127         /* Generic HID++ processing. */
3128         switch (data[0]) {
3129         case REPORT_ID_HIDPP_VERY_LONG:
3130                 if (size != hidpp->very_long_report_length) {
3131                         hid_err(hdev, "received hid++ report of bad size (%d)",
3132                                 size);
3133                         return 1;
3134                 }
3135                 ret = hidpp_raw_hidpp_event(hidpp, data, size);
3136                 break;
3137         case REPORT_ID_HIDPP_LONG:
3138                 if (size != HIDPP_REPORT_LONG_LENGTH) {
3139                         hid_err(hdev, "received hid++ report of bad size (%d)",
3140                                 size);
3141                         return 1;
3142                 }
3143                 ret = hidpp_raw_hidpp_event(hidpp, data, size);
3144                 break;
3145         case REPORT_ID_HIDPP_SHORT:
3146                 if (size != HIDPP_REPORT_SHORT_LENGTH) {
3147                         hid_err(hdev, "received hid++ report of bad size (%d)",
3148                                 size);
3149                         return 1;
3150                 }
3151                 ret = hidpp_raw_hidpp_event(hidpp, data, size);
3152                 break;
3153         }
3154
3155         /* If no report is available for further processing, skip calling
3156          * raw_event of subclasses. */
3157         if (ret != 0)
3158                 return ret;
3159
3160         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
3161                 return wtp_raw_event(hdev, data, size);
3162         else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560)
3163                 return m560_raw_event(hdev, data, size);
3164
3165         return 0;
3166 }
3167
3168 static int hidpp_event(struct hid_device *hdev, struct hid_field *field,
3169         struct hid_usage *usage, __s32 value)
3170 {
3171         /* This function will only be called for scroll events, due to the
3172          * restriction imposed in hidpp_usages.
3173          */
3174         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
3175         struct hidpp_scroll_counter *counter;
3176
3177         if (!hidpp)
3178                 return 0;
3179
3180         counter = &hidpp->vertical_wheel_counter;
3181         /* A scroll event may occur before the multiplier has been retrieved or
3182          * the input device set, or high-res scroll enabling may fail. In such
3183          * cases we must return early (falling back to default behaviour) to
3184          * avoid a crash in hidpp_scroll_counter_handle_scroll.
3185          */
3186         if (!(hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL) || value == 0
3187             || hidpp->input == NULL || counter->wheel_multiplier == 0)
3188                 return 0;
3189
3190         hidpp_scroll_counter_handle_scroll(hidpp->input, counter, value);
3191         return 1;
3192 }
3193
3194 static int hidpp_initialize_battery(struct hidpp_device *hidpp)
3195 {
3196         static atomic_t battery_no = ATOMIC_INIT(0);
3197         struct power_supply_config cfg = { .drv_data = hidpp };
3198         struct power_supply_desc *desc = &hidpp->battery.desc;
3199         enum power_supply_property *battery_props;
3200         struct hidpp_battery *battery;
3201         unsigned int num_battery_props;
3202         unsigned long n;
3203         int ret;
3204
3205         if (hidpp->battery.ps)
3206                 return 0;
3207
3208         hidpp->battery.feature_index = 0xff;
3209         hidpp->battery.solar_feature_index = 0xff;
3210
3211         if (hidpp->protocol_major >= 2) {
3212                 if (hidpp->quirks & HIDPP_QUIRK_CLASS_K750)
3213                         ret = hidpp_solar_request_battery_event(hidpp);
3214                 else
3215                         ret = hidpp20_query_battery_info(hidpp);
3216
3217                 if (ret)
3218                         return ret;
3219                 hidpp->capabilities |= HIDPP_CAPABILITY_HIDPP20_BATTERY;
3220         } else {
3221                 ret = hidpp10_query_battery_status(hidpp);
3222                 if (ret) {
3223                         ret = hidpp10_query_battery_mileage(hidpp);
3224                         if (ret)
3225                                 return -ENOENT;
3226                         hidpp->capabilities |= HIDPP_CAPABILITY_BATTERY_MILEAGE;
3227                 } else {
3228                         hidpp->capabilities |= HIDPP_CAPABILITY_BATTERY_LEVEL_STATUS;
3229                 }
3230                 hidpp->capabilities |= HIDPP_CAPABILITY_HIDPP10_BATTERY;
3231         }
3232
3233         battery_props = devm_kmemdup(&hidpp->hid_dev->dev,
3234                                      hidpp_battery_props,
3235                                      sizeof(hidpp_battery_props),
3236                                      GFP_KERNEL);
3237         if (!battery_props)
3238                 return -ENOMEM;
3239
3240         num_battery_props = ARRAY_SIZE(hidpp_battery_props) - 2;
3241
3242         if (hidpp->capabilities & HIDPP_CAPABILITY_BATTERY_MILEAGE)
3243                 battery_props[num_battery_props++] =
3244                                 POWER_SUPPLY_PROP_CAPACITY;
3245
3246         if (hidpp->capabilities & HIDPP_CAPABILITY_BATTERY_LEVEL_STATUS)
3247                 battery_props[num_battery_props++] =
3248                                 POWER_SUPPLY_PROP_CAPACITY_LEVEL;
3249
3250         battery = &hidpp->battery;
3251
3252         n = atomic_inc_return(&battery_no) - 1;
3253         desc->properties = battery_props;
3254         desc->num_properties = num_battery_props;
3255         desc->get_property = hidpp_battery_get_property;
3256         sprintf(battery->name, "hidpp_battery_%ld", n);
3257         desc->name = battery->name;
3258         desc->type = POWER_SUPPLY_TYPE_BATTERY;
3259         desc->use_for_apm = 0;
3260
3261         battery->ps = devm_power_supply_register(&hidpp->hid_dev->dev,
3262                                                  &battery->desc,
3263                                                  &cfg);
3264         if (IS_ERR(battery->ps))
3265                 return PTR_ERR(battery->ps);
3266
3267         power_supply_powers(battery->ps, &hidpp->hid_dev->dev);
3268
3269         return ret;
3270 }
3271
3272 static void hidpp_overwrite_name(struct hid_device *hdev)
3273 {
3274         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
3275         char *name;
3276
3277         if (hidpp->protocol_major < 2)
3278                 return;
3279
3280         name = hidpp_get_device_name(hidpp);
3281
3282         if (!name) {
3283                 hid_err(hdev, "unable to retrieve the name of the device");
3284         } else {
3285                 dbg_hid("HID++: Got name: %s\n", name);
3286                 snprintf(hdev->name, sizeof(hdev->name), "%s", name);
3287         }
3288
3289         kfree(name);
3290 }
3291
3292 static int hidpp_input_open(struct input_dev *dev)
3293 {
3294         struct hid_device *hid = input_get_drvdata(dev);
3295
3296         return hid_hw_open(hid);
3297 }
3298
3299 static void hidpp_input_close(struct input_dev *dev)
3300 {
3301         struct hid_device *hid = input_get_drvdata(dev);
3302
3303         hid_hw_close(hid);
3304 }
3305
3306 static struct input_dev *hidpp_allocate_input(struct hid_device *hdev)
3307 {
3308         struct input_dev *input_dev = devm_input_allocate_device(&hdev->dev);
3309         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
3310
3311         if (!input_dev)
3312                 return NULL;
3313
3314         input_set_drvdata(input_dev, hdev);
3315         input_dev->open = hidpp_input_open;
3316         input_dev->close = hidpp_input_close;
3317
3318         input_dev->name = hidpp->name;
3319         input_dev->phys = hdev->phys;
3320         input_dev->uniq = hdev->uniq;
3321         input_dev->id.bustype = hdev->bus;
3322         input_dev->id.vendor  = hdev->vendor;
3323         input_dev->id.product = hdev->product;
3324         input_dev->id.version = hdev->version;
3325         input_dev->dev.parent = &hdev->dev;
3326
3327         return input_dev;
3328 }
3329
3330 static void hidpp_connect_event(struct hidpp_device *hidpp)
3331 {
3332         struct hid_device *hdev = hidpp->hid_dev;
3333         int ret = 0;
3334         bool connected = atomic_read(&hidpp->connected);
3335         struct input_dev *input;
3336         char *name, *devm_name;
3337
3338         if (!connected) {
3339                 if (hidpp->battery.ps) {
3340                         hidpp->battery.online = false;
3341                         hidpp->battery.status = POWER_SUPPLY_STATUS_UNKNOWN;
3342                         hidpp->battery.level = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
3343                         power_supply_changed(hidpp->battery.ps);
3344                 }
3345                 return;
3346         }
3347
3348         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
3349                 ret = wtp_connect(hdev, connected);
3350                 if (ret)
3351                         return;
3352         } else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560) {
3353                 ret = m560_send_config_command(hdev, connected);
3354                 if (ret)
3355                         return;
3356         } else if (hidpp->quirks & HIDPP_QUIRK_CLASS_K400) {
3357                 ret = k400_connect(hdev, connected);
3358                 if (ret)
3359                         return;
3360         }
3361
3362         if (hidpp->quirks & HIDPP_QUIRK_HIDPP_WHEELS) {
3363                 ret = hidpp10_wheel_connect(hidpp);
3364                 if (ret)
3365                         return;
3366         }
3367
3368         if (hidpp->quirks & HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS) {
3369                 ret = hidpp10_extra_mouse_buttons_connect(hidpp);
3370                 if (ret)
3371                         return;
3372         }
3373
3374         if (hidpp->quirks & HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS) {
3375                 ret = hidpp10_consumer_keys_connect(hidpp);
3376                 if (ret)
3377                         return;
3378         }
3379
3380         /* the device is already connected, we can ask for its name and
3381          * protocol */
3382         if (!hidpp->protocol_major) {
3383                 ret = hidpp_root_get_protocol_version(hidpp);
3384                 if (ret) {
3385                         hid_err(hdev, "Can not get the protocol version.\n");
3386                         return;
3387                 }
3388         }
3389
3390         if (hidpp->name == hdev->name && hidpp->protocol_major >= 2) {
3391                 name = hidpp_get_device_name(hidpp);
3392                 if (name) {
3393                         devm_name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
3394                                                    "%s", name);
3395                         kfree(name);
3396                         if (!devm_name)
3397                                 return;
3398
3399                         hidpp->name = devm_name;
3400                 }
3401         }
3402
3403         hidpp_initialize_battery(hidpp);
3404
3405         /* forward current battery state */
3406         if (hidpp->capabilities & HIDPP_CAPABILITY_HIDPP10_BATTERY) {
3407                 hidpp10_enable_battery_reporting(hidpp);
3408                 if (hidpp->capabilities & HIDPP_CAPABILITY_BATTERY_MILEAGE)
3409                         hidpp10_query_battery_mileage(hidpp);
3410                 else
3411                         hidpp10_query_battery_status(hidpp);
3412         } else if (hidpp->capabilities & HIDPP_CAPABILITY_HIDPP20_BATTERY) {
3413                 hidpp20_query_battery_info(hidpp);
3414         }
3415         if (hidpp->battery.ps)
3416                 power_supply_changed(hidpp->battery.ps);
3417
3418         if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL)
3419                 hi_res_scroll_enable(hidpp);
3420
3421         if (!(hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT) || hidpp->delayed_input)
3422                 /* if the input nodes are already created, we can stop now */
3423                 return;
3424
3425         input = hidpp_allocate_input(hdev);
3426         if (!input) {
3427                 hid_err(hdev, "cannot allocate new input device: %d\n", ret);
3428                 return;
3429         }
3430
3431         hidpp_populate_input(hidpp, input);
3432
3433         ret = input_register_device(input);
3434         if (ret)
3435                 input_free_device(input);
3436
3437         hidpp->delayed_input = input;
3438 }
3439
3440 static DEVICE_ATTR(builtin_power_supply, 0000, NULL, NULL);
3441
3442 static struct attribute *sysfs_attrs[] = {
3443         &dev_attr_builtin_power_supply.attr,
3444         NULL
3445 };
3446
3447 static const struct attribute_group ps_attribute_group = {
3448         .attrs = sysfs_attrs
3449 };
3450
3451 static int hidpp_get_report_length(struct hid_device *hdev, int id)
3452 {
3453         struct hid_report_enum *re;
3454         struct hid_report *report;
3455
3456         re = &(hdev->report_enum[HID_OUTPUT_REPORT]);
3457         report = re->report_id_hash[id];
3458         if (!report)
3459                 return 0;
3460
3461         return report->field[0]->report_count + 1;
3462 }
3463
3464 static bool hidpp_validate_report(struct hid_device *hdev, int id,
3465                                   int expected_length, bool optional)
3466 {
3467         int report_length;
3468
3469         if (id >= HID_MAX_IDS || id < 0) {
3470                 hid_err(hdev, "invalid HID report id %u\n", id);
3471                 return false;
3472         }
3473
3474         report_length = hidpp_get_report_length(hdev, id);
3475         if (!report_length)
3476                 return optional;
3477
3478         if (report_length < expected_length) {
3479                 hid_warn(hdev, "not enough values in hidpp report %d\n", id);
3480                 return false;
3481         }
3482
3483         return true;
3484 }
3485
3486 static bool hidpp_validate_device(struct hid_device *hdev)
3487 {
3488         return hidpp_validate_report(hdev, REPORT_ID_HIDPP_SHORT,
3489                                      HIDPP_REPORT_SHORT_LENGTH, false) &&
3490                hidpp_validate_report(hdev, REPORT_ID_HIDPP_LONG,
3491                                      HIDPP_REPORT_LONG_LENGTH, true);
3492 }
3493
3494 static bool hidpp_application_equals(struct hid_device *hdev,
3495                                      unsigned int application)
3496 {
3497         struct list_head *report_list;
3498         struct hid_report *report;
3499
3500         report_list = &hdev->report_enum[HID_INPUT_REPORT].report_list;
3501         report = list_first_entry_or_null(report_list, struct hid_report, list);
3502         return report && report->application == application;
3503 }
3504
3505 static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
3506 {
3507         struct hidpp_device *hidpp;
3508         int ret;
3509         bool connected;
3510         unsigned int connect_mask = HID_CONNECT_DEFAULT;
3511
3512         /* report_fixup needs drvdata to be set before we call hid_parse */
3513         hidpp = devm_kzalloc(&hdev->dev, sizeof(*hidpp), GFP_KERNEL);
3514         if (!hidpp)
3515                 return -ENOMEM;
3516
3517         hidpp->hid_dev = hdev;
3518         hidpp->name = hdev->name;
3519         hidpp->quirks = id->driver_data;
3520         hid_set_drvdata(hdev, hidpp);
3521
3522         ret = hid_parse(hdev);
3523         if (ret) {
3524                 hid_err(hdev, "%s:parse failed\n", __func__);
3525                 return ret;
3526         }
3527
3528         /*
3529          * Make sure the device is HID++ capable, otherwise treat as generic HID
3530          */
3531         if (!hidpp_validate_device(hdev)) {
3532                 hid_set_drvdata(hdev, NULL);
3533                 devm_kfree(&hdev->dev, hidpp);
3534                 return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
3535         }
3536
3537         hidpp->very_long_report_length =
3538                 hidpp_get_report_length(hdev, REPORT_ID_HIDPP_VERY_LONG);
3539         if (hidpp->very_long_report_length > HIDPP_REPORT_VERY_LONG_MAX_LENGTH)
3540                 hidpp->very_long_report_length = HIDPP_REPORT_VERY_LONG_MAX_LENGTH;
3541
3542         if (id->group == HID_GROUP_LOGITECH_DJ_DEVICE)
3543                 hidpp->quirks |= HIDPP_QUIRK_UNIFYING;
3544
3545         if (id->group == HID_GROUP_LOGITECH_27MHZ_DEVICE &&
3546             hidpp_application_equals(hdev, HID_GD_MOUSE))
3547                 hidpp->quirks |= HIDPP_QUIRK_HIDPP_WHEELS |
3548                                  HIDPP_QUIRK_HIDPP_EXTRA_MOUSE_BTNS;
3549
3550         if (id->group == HID_GROUP_LOGITECH_27MHZ_DEVICE &&
3551             hidpp_application_equals(hdev, HID_GD_KEYBOARD))
3552                 hidpp->quirks |= HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS;
3553
3554         if (disable_raw_mode) {
3555                 hidpp->quirks &= ~HIDPP_QUIRK_CLASS_WTP;
3556                 hidpp->quirks &= ~HIDPP_QUIRK_NO_HIDINPUT;
3557         }
3558
3559         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
3560                 ret = wtp_allocate(hdev, id);
3561                 if (ret)
3562                         return ret;
3563         } else if (hidpp->quirks & HIDPP_QUIRK_CLASS_K400) {
3564                 ret = k400_allocate(hdev);
3565                 if (ret)
3566                         return ret;
3567         }
3568
3569         INIT_WORK(&hidpp->work, delayed_work_cb);
3570         mutex_init(&hidpp->send_mutex);
3571         init_waitqueue_head(&hidpp->wait);
3572
3573         /* indicates we are handling the battery properties in the kernel */
3574         ret = sysfs_create_group(&hdev->dev.kobj, &ps_attribute_group);
3575         if (ret)
3576                 hid_warn(hdev, "Cannot allocate sysfs group for %s\n",
3577                          hdev->name);
3578
3579         /*
3580          * Plain USB connections need to actually call start and open
3581          * on the transport driver to allow incoming data.
3582          */
3583         ret = hid_hw_start(hdev, 0);
3584         if (ret) {
3585                 hid_err(hdev, "hw start failed\n");
3586                 goto hid_hw_start_fail;
3587         }
3588
3589         ret = hid_hw_open(hdev);
3590         if (ret < 0) {
3591                 dev_err(&hdev->dev, "%s:hid_hw_open returned error:%d\n",
3592                         __func__, ret);
3593                 hid_hw_stop(hdev);
3594                 goto hid_hw_open_fail;
3595         }
3596
3597         /* Allow incoming packets */
3598         hid_device_io_start(hdev);
3599
3600         if (hidpp->quirks & HIDPP_QUIRK_UNIFYING)
3601                 hidpp_unifying_init(hidpp);
3602
3603         connected = hidpp_root_get_protocol_version(hidpp) == 0;
3604         atomic_set(&hidpp->connected, connected);
3605         if (!(hidpp->quirks & HIDPP_QUIRK_UNIFYING)) {
3606                 if (!connected) {
3607                         ret = -ENODEV;
3608                         hid_err(hdev, "Device not connected");
3609                         goto hid_hw_init_fail;
3610                 }
3611
3612                 hidpp_overwrite_name(hdev);
3613         }
3614
3615         if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)) {
3616                 ret = wtp_get_config(hidpp);
3617                 if (ret)
3618                         goto hid_hw_init_fail;
3619         } else if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_G920)) {
3620                 ret = g920_get_config(hidpp);
3621                 if (ret)
3622                         goto hid_hw_init_fail;
3623         }
3624
3625         hidpp_connect_event(hidpp);
3626
3627         /* Reset the HID node state */
3628         hid_device_io_stop(hdev);
3629         hid_hw_close(hdev);
3630         hid_hw_stop(hdev);
3631
3632         if (hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT)
3633                 connect_mask &= ~HID_CONNECT_HIDINPUT;
3634
3635         /* Now export the actual inputs and hidraw nodes to the world */
3636         ret = hid_hw_start(hdev, connect_mask);
3637         if (ret) {
3638                 hid_err(hdev, "%s:hid_hw_start returned error\n", __func__);
3639                 goto hid_hw_start_fail;
3640         }
3641
3642         return ret;
3643
3644 hid_hw_init_fail:
3645         hid_hw_close(hdev);
3646 hid_hw_open_fail:
3647         hid_hw_stop(hdev);
3648 hid_hw_start_fail:
3649         sysfs_remove_group(&hdev->dev.kobj, &ps_attribute_group);
3650         cancel_work_sync(&hidpp->work);
3651         mutex_destroy(&hidpp->send_mutex);
3652         return ret;
3653 }
3654
3655 static void hidpp_remove(struct hid_device *hdev)
3656 {
3657         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
3658
3659         if (!hidpp)
3660                 return hid_hw_stop(hdev);
3661
3662         sysfs_remove_group(&hdev->dev.kobj, &ps_attribute_group);
3663
3664         if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920)
3665                 hidpp_ff_deinit(hdev);
3666
3667         hid_hw_stop(hdev);
3668         cancel_work_sync(&hidpp->work);
3669         mutex_destroy(&hidpp->send_mutex);
3670 }
3671
3672 #define LDJ_DEVICE(product) \
3673         HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE, \
3674                    USB_VENDOR_ID_LOGITECH, (product))
3675
3676 #define L27MHZ_DEVICE(product) \
3677         HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_27MHZ_DEVICE, \
3678                    USB_VENDOR_ID_LOGITECH, (product))
3679
3680 static const struct hid_device_id hidpp_devices[] = {
3681         { /* wireless touchpad */
3682           LDJ_DEVICE(0x4011),
3683           .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT |
3684                          HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS },
3685         { /* wireless touchpad T650 */
3686           LDJ_DEVICE(0x4101),
3687           .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT },
3688         { /* wireless touchpad T651 */
3689           HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
3690                 USB_DEVICE_ID_LOGITECH_T651),
3691           .driver_data = HIDPP_QUIRK_CLASS_WTP },
3692         { /* Mouse Logitech Anywhere MX */
3693           LDJ_DEVICE(0x1017), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_1P0 },
3694         { /* Mouse Logitech Cube */
3695           LDJ_DEVICE(0x4010), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2120 },
3696         { /* Mouse Logitech M335 */
3697           LDJ_DEVICE(0x4050), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3698         { /* Mouse Logitech M515 */
3699           LDJ_DEVICE(0x4007), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2120 },
3700         { /* Mouse logitech M560 */
3701           LDJ_DEVICE(0x402d),
3702           .driver_data = HIDPP_QUIRK_DELAYED_INIT | HIDPP_QUIRK_CLASS_M560
3703                 | HIDPP_QUIRK_HI_RES_SCROLL_X2120 },
3704         { /* Mouse Logitech M705 (firmware RQM17) */
3705           LDJ_DEVICE(0x101b), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_1P0 },
3706         { /* Mouse Logitech M705 (firmware RQM67) */
3707           LDJ_DEVICE(0x406d), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3708         { /* Mouse Logitech M720 */
3709           LDJ_DEVICE(0x405e), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3710         { /* Mouse Logitech MX Anywhere 2 */
3711           LDJ_DEVICE(0x404a), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3712         { LDJ_DEVICE(0xb013), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3713         { LDJ_DEVICE(0xb018), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3714         { LDJ_DEVICE(0xb01f), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3715         { /* Mouse Logitech MX Anywhere 2S */
3716           LDJ_DEVICE(0x406a), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3717         { /* Mouse Logitech MX Master */
3718           LDJ_DEVICE(0x4041), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3719         { LDJ_DEVICE(0x4060), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3720         { LDJ_DEVICE(0x4071), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3721         { /* Mouse Logitech MX Master 2S */
3722           LDJ_DEVICE(0x4069), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
3723         { /* Mouse Logitech Performance MX */
3724           LDJ_DEVICE(0x101a), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_1P0 },
3725         { /* Keyboard logitech K400 */
3726           LDJ_DEVICE(0x4024),
3727           .driver_data = HIDPP_QUIRK_CLASS_K400 },
3728         { /* Solar Keyboard Logitech K750 */
3729           LDJ_DEVICE(0x4002),
3730           .driver_data = HIDPP_QUIRK_CLASS_K750 },
3731         { /* Keyboard MX5000 (Bluetooth-receiver in HID proxy mode) */
3732           LDJ_DEVICE(0xb305),
3733           .driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
3734         { /* Keyboard MX5500 (Bluetooth-receiver in HID proxy mode) */
3735           LDJ_DEVICE(0xb30b),
3736           .driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
3737
3738         { LDJ_DEVICE(HID_ANY_ID) },
3739
3740         { /* Keyboard LX501 (Y-RR53) */
3741           L27MHZ_DEVICE(0x0049),
3742           .driver_data = HIDPP_QUIRK_KBD_ZOOM_WHEEL },
3743         { /* Keyboard MX3000 (Y-RAM74) */
3744           L27MHZ_DEVICE(0x0057),
3745           .driver_data = HIDPP_QUIRK_KBD_SCROLL_WHEEL },
3746         { /* Keyboard MX3200 (Y-RAV80) */
3747           L27MHZ_DEVICE(0x005c),
3748           .driver_data = HIDPP_QUIRK_KBD_ZOOM_WHEEL },
3749         { /* S510 Media Remote */
3750           L27MHZ_DEVICE(0x00fe),
3751           .driver_data = HIDPP_QUIRK_KBD_SCROLL_WHEEL },
3752
3753         { L27MHZ_DEVICE(HID_ANY_ID) },
3754
3755         { /* Logitech G403 Wireless Gaming Mouse over USB */
3756           HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC082) },
3757         { /* Logitech G703 Gaming Mouse over USB */
3758           HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC087) },
3759         { /* Logitech G703 Hero Gaming Mouse over USB */
3760           HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC090) },
3761         { /* Logitech G900 Gaming Mouse over USB */
3762           HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC081) },
3763         { /* Logitech G903 Gaming Mouse over USB */
3764           HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC086) },
3765         { /* Logitech G903 Hero Gaming Mouse over USB */
3766           HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC091) },
3767         { /* Logitech G920 Wheel over USB */
3768           HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_G920_WHEEL),
3769                 .driver_data = HIDPP_QUIRK_CLASS_G920 | HIDPP_QUIRK_FORCE_OUTPUT_REPORTS},
3770         { /* Logitech G Pro Gaming Mouse over USB */
3771           HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, 0xC088) },
3772
3773         { /* MX5000 keyboard over Bluetooth */
3774           HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb305),
3775           .driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
3776         { /* MX5500 keyboard over Bluetooth */
3777           HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb30b),
3778           .driver_data = HIDPP_QUIRK_HIDPP_CONSUMER_VENDOR_KEYS },
3779         {}
3780 };
3781
3782 MODULE_DEVICE_TABLE(hid, hidpp_devices);
3783
3784 static const struct hid_usage_id hidpp_usages[] = {
3785         { HID_GD_WHEEL, EV_REL, REL_WHEEL_HI_RES },
3786         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
3787 };
3788
3789 static struct hid_driver hidpp_driver = {
3790         .name = "logitech-hidpp-device",
3791         .id_table = hidpp_devices,
3792         .report_fixup = hidpp_report_fixup,
3793         .probe = hidpp_probe,
3794         .remove = hidpp_remove,
3795         .raw_event = hidpp_raw_event,
3796         .usage_table = hidpp_usages,
3797         .event = hidpp_event,
3798         .input_configured = hidpp_input_configured,
3799         .input_mapping = hidpp_input_mapping,
3800         .input_mapped = hidpp_input_mapped,
3801 };
3802
3803 module_hid_driver(hidpp_driver);