drivers/hid/hid-rmi.c

   1 /*
   2  *  Copyright (c) 2013 Andrew Duggan <aduggan@synaptics.com>
   3  *  Copyright (c) 2013 Synaptics Incorporated
   4  *  Copyright (c) 2014 Benjamin Tissoires <benjamin.tissoires@gmail.com>
   5  *  Copyright (c) 2014 Red Hat, Inc
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/hid.h>
  15 #include <linux/input.h>
  16 #include <linux/input/mt.h>
  17 #include <linux/module.h>
  18 #include <linux/pm.h>
  19 #include <linux/slab.h>
  20 #include <linux/wait.h>
  21 #include <linux/sched.h>
  22 #include "hid-ids.h"
  23
  24 #define RMI_MOUSE_REPORT_ID             0x01 /* Mouse emulation Report */
  25 #define RMI_WRITE_REPORT_ID             0x09 /* Output Report */
  26 #define RMI_READ_ADDR_REPORT_ID         0x0a /* Output Report */
  27 #define RMI_READ_DATA_REPORT_ID         0x0b /* Input Report */
  28 #define RMI_ATTN_REPORT_ID              0x0c /* Input Report */
  29 #define RMI_SET_RMI_MODE_REPORT_ID      0x0f /* Feature Report */
  30
  31 /* flags */
  32 #define RMI_READ_REQUEST_PENDING        0
  33 #define RMI_READ_DATA_PENDING           1
  34 #define RMI_STARTED                     2
  35
  36 #define RMI_SLEEP_NORMAL                0x0
  37 #define RMI_SLEEP_DEEP_SLEEP            0x1
  38
  39 /* device flags */
  40 #define RMI_DEVICE                      BIT(0)
  41 #define RMI_DEVICE_HAS_PHYS_BUTTONS     BIT(1)
  42
  43 /*
  44  * retrieve the ctrl registers
  45  * the ctrl register has a size of 20 but a fw bug split it into 16 + 4,
  46  * and there is no way to know if the first 20 bytes are here or not.
  47  * We use only the first 12 bytes, so get only them.
  48  */
  49 #define RMI_F11_CTRL_REG_COUNT          12
  50
  51 enum rmi_mode_type {
  52         RMI_MODE_OFF                    = 0,
  53         RMI_MODE_ATTN_REPORTS           = 1,
  54         RMI_MODE_NO_PACKED_ATTN_REPORTS = 2,
  55 };
  56
  57 struct rmi_function {
  58         unsigned page;                  /* page of the function */
  59         u16 query_base_addr;            /* base address for queries */
  60         u16 command_base_addr;          /* base address for commands */
  61         u16 control_base_addr;          /* base address for controls */
  62         u16 data_base_addr;             /* base address for datas */
  63         unsigned int interrupt_base;    /* cross-function interrupt number
  64                                          * (uniq in the device)*/
  65         unsigned int interrupt_count;   /* number of interrupts */
  66         unsigned int report_size;       /* size of a report */
  67         unsigned long irq_mask;         /* mask of the interrupts
  68                                          * (to be applied against ATTN IRQ) */
  69 };
  70
  71 /**
  72  * struct rmi_data - stores information for hid communication
  73  *
  74  * @page_mutex: Locks current page to avoid changing pages in unexpected ways.
  75  * @page: Keeps track of the current virtual page
  76  *
  77  * @wait: Used for waiting for read data
  78  *
  79  * @writeReport: output buffer when writing RMI registers
  80  * @readReport: input buffer when reading RMI registers
  81  *
  82  * @input_report_size: size of an input report (advertised by HID)
  83  * @output_report_size: size of an output report (advertised by HID)
  84  *
  85  * @flags: flags for the current device (started, reading, etc...)
  86  *
  87  * @f11: placeholder of internal RMI function F11 description
  88  * @f30: placeholder of internal RMI function F30 description
  89  *
  90  * @max_fingers: maximum finger count reported by the device
  91  * @max_x: maximum x value reported by the device
  92  * @max_y: maximum y value reported by the device
  93  *
  94  * @gpio_led_count: count of GPIOs + LEDs reported by F30
  95  * @button_count: actual physical buttons count
  96  * @button_mask: button mask used to decode GPIO ATTN reports
  97  * @button_state_mask: pull state of the buttons
  98  *
  99  * @input: pointer to the kernel input device
 100  *
 101  * @reset_work: worker which will be called in case of a mouse report
 102  * @hdev: pointer to the struct hid_device
 103  */
 104 struct rmi_data {
 105         struct mutex page_mutex;
 106         int page;
 107
 108         wait_queue_head_t wait;
 109
 110         u8 *writeReport;
 111         u8 *readReport;
 112
 113         u32 input_report_size;
 114         u32 output_report_size;
 115
 116         unsigned long flags;
 117
 118         struct rmi_function f01;
 119         struct rmi_function f11;
 120         struct rmi_function f30;
 121
 122         unsigned int max_fingers;
 123         unsigned int max_x;
 124         unsigned int max_y;
 125         unsigned int x_size_mm;
 126         unsigned int y_size_mm;
 127         bool read_f11_ctrl_regs;
 128         u8 f11_ctrl_regs[RMI_F11_CTRL_REG_COUNT];
 129
 130         unsigned int gpio_led_count;
 131         unsigned int button_count;
 132         unsigned long button_mask;
 133         unsigned long button_state_mask;
 134
 135         struct input_dev *input;
 136
 137         struct work_struct reset_work;
 138         struct hid_device *hdev;
 139
 140         unsigned long device_flags;
 141         unsigned long firmware_id;
 142
 143         u8 f01_ctrl0;
 144         u8 interrupt_enable_mask;
 145         bool restore_interrupt_mask;
 146 };
 147
 148 #define RMI_PAGE(addr) (((addr) >> 8) & 0xff)
 149
 150 static int rmi_write_report(struct hid_device *hdev, u8 *report, int len);
 151
 152 /**
 153  * rmi_set_page - Set RMI page
 154  * @hdev: The pointer to the hid_device struct
 155  * @page: The new page address.
 156  *
 157  * RMI devices have 16-bit addressing, but some of the physical
 158  * implementations (like SMBus) only have 8-bit addressing. So RMI implements
 159  * a page address at 0xff of every page so we can reliable page addresses
 160  * every 256 registers.
 161  *
 162  * The page_mutex lock must be held when this function is entered.
 163  *
 164  * Returns zero on success, non-zero on failure.
 165  */
 166 static int rmi_set_page(struct hid_device *hdev, u8 page)
 167 {
 168         struct rmi_data *data = hid_get_drvdata(hdev);
 169         int retval;
 170
 171         data->writeReport[0] = RMI_WRITE_REPORT_ID;
 172         data->writeReport[1] = 1;
 173         data->writeReport[2] = 0xFF;
 174         data->writeReport[4] = page;
 175
 176         retval = rmi_write_report(hdev, data->writeReport,
 177                         data->output_report_size);
 178         if (retval != data->output_report_size) {
 179                 dev_err(&hdev->dev,
 180                         "%s: set page failed: %d.", __func__, retval);
 181                 return retval;
 182         }
 183
 184         data->page = page;
 185         return 0;
 186 }
 187
 188 static int rmi_set_mode(struct hid_device *hdev, u8 mode)
 189 {
 190         int ret;
 191         const u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode};
 192         u8 *buf;
 193
 194         buf = kmemdup(txbuf, sizeof(txbuf), GFP_KERNEL);
 195         if (!buf)
 196                 return -ENOMEM;
 197
 198         ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, buf,
 199                         sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 200         kfree(buf);
 201         if (ret < 0) {
 202                 dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode,
 203                         ret);
 204                 return ret;
 205         }
 206
 207         return 0;
 208 }
 209
 210 static int rmi_write_report(struct hid_device *hdev, u8 *report, int len)
 211 {
 212         int ret;
 213
 214         ret = hid_hw_output_report(hdev, (void *)report, len);
 215         if (ret < 0) {
 216                 dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret);
 217                 return ret;
 218         }
 219
 220         return ret;
 221 }
 222
 223 static int rmi_read_block(struct hid_device *hdev, u16 addr, void *buf,
 224                 const int len)
 225 {
 226         struct rmi_data *data = hid_get_drvdata(hdev);
 227         int ret;
 228         int bytes_read;
 229         int bytes_needed;
 230         int retries;
 231         int read_input_count;
 232
 233         mutex_lock(&data->page_mutex);
 234
 235         if (RMI_PAGE(addr) != data->page) {
 236                 ret = rmi_set_page(hdev, RMI_PAGE(addr));
 237                 if (ret < 0)
 238                         goto exit;
 239         }
 240
 241         for (retries = 5; retries > 0; retries--) {
 242                 data->writeReport[0] = RMI_READ_ADDR_REPORT_ID;
 243                 data->writeReport[1] = 0; /* old 1 byte read count */
 244                 data->writeReport[2] = addr & 0xFF;
 245                 data->writeReport[3] = (addr >> 8) & 0xFF;
 246                 data->writeReport[4] = len  & 0xFF;
 247                 data->writeReport[5] = (len >> 8) & 0xFF;
 248
 249                 set_bit(RMI_READ_REQUEST_PENDING, &data->flags);
 250
 251                 ret = rmi_write_report(hdev, data->writeReport,
 252                                                 data->output_report_size);
 253                 if (ret != data->output_report_size) {
 254                         clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
 255                         dev_err(&hdev->dev,
 256                                 "failed to write request output report (%d)\n",
 257                                 ret);
 258                         goto exit;
 259                 }
 260
 261                 bytes_read = 0;
 262                 bytes_needed = len;
 263                 while (bytes_read < len) {
 264                         if (!wait_event_timeout(data->wait,
 265                                 test_bit(RMI_READ_DATA_PENDING, &data->flags),
 266                                         msecs_to_jiffies(1000))) {
 267                                 hid_warn(hdev, "%s: timeout elapsed\n",
 268                                          __func__);
 269                                 ret = -EAGAIN;
 270                                 break;
 271                         }
 272
 273                         read_input_count = data->readReport[1];
 274                         memcpy(buf + bytes_read, &data->readReport[2],
 275                                 read_input_count < bytes_needed ?
 276                                         read_input_count : bytes_needed);
 277
 278                         bytes_read += read_input_count;
 279                         bytes_needed -= read_input_count;
 280                         clear_bit(RMI_READ_DATA_PENDING, &data->flags);
 281                 }
 282
 283                 if (ret >= 0) {
 284                         ret = 0;
 285                         break;
 286                 }
 287         }
 288
 289 exit:
 290         clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
 291         mutex_unlock(&data->page_mutex);
 292         return ret;
 293 }
 294
 295 static inline int rmi_read(struct hid_device *hdev, u16 addr, void *buf)
 296 {
 297         return rmi_read_block(hdev, addr, buf, 1);
 298 }
 299
 300 static int rmi_write_block(struct hid_device *hdev, u16 addr, void *buf,
 301                 const int len)
 302 {
 303         struct rmi_data *data = hid_get_drvdata(hdev);
 304         int ret;
 305
 306         mutex_lock(&data->page_mutex);
 307
 308         if (RMI_PAGE(addr) != data->page) {
 309                 ret = rmi_set_page(hdev, RMI_PAGE(addr));
 310                 if (ret < 0)
 311                         goto exit;
 312         }
 313
 314         data->writeReport[0] = RMI_WRITE_REPORT_ID;
 315         data->writeReport[1] = len;
 316         data->writeReport[2] = addr & 0xFF;
 317         data->writeReport[3] = (addr >> 8) & 0xFF;
 318         memcpy(&data->writeReport[4], buf, len);
 319
 320         ret = rmi_write_report(hdev, data->writeReport,
 321                                         data->output_report_size);
 322         if (ret < 0) {
 323                 dev_err(&hdev->dev,
 324                         "failed to write request output report (%d)\n",
 325                         ret);
 326                 goto exit;
 327         }
 328         ret = 0;
 329
 330 exit:
 331         mutex_unlock(&data->page_mutex);
 332         return ret;
 333 }
 334
 335 static inline int rmi_write(struct hid_device *hdev, u16 addr, void *buf)
 336 {
 337         return rmi_write_block(hdev, addr, buf, 1);
 338 }
 339
 340 static void rmi_f11_process_touch(struct rmi_data *hdata, int slot,
 341                 u8 finger_state, u8 *touch_data)
 342 {
 343         int x, y, wx, wy;
 344         int wide, major, minor;
 345         int z;
 346
 347         input_mt_slot(hdata->input, slot);
 348         input_mt_report_slot_state(hdata->input, MT_TOOL_FINGER,
 349                         finger_state == 0x01);
 350         if (finger_state == 0x01) {
 351                 x = (touch_data[0] << 4) | (touch_data[2] & 0x0F);
 352                 y = (touch_data[1] << 4) | (touch_data[2] >> 4);
 353                 wx = touch_data[3] & 0x0F;
 354                 wy = touch_data[3] >> 4;
 355                 wide = (wx > wy);
 356                 major = max(wx, wy);
 357                 minor = min(wx, wy);
 358                 z = touch_data[4];
 359
 360                 /* y is inverted */
 361                 y = hdata->max_y - y;
 362
 363                 input_event(hdata->input, EV_ABS, ABS_MT_POSITION_X, x);
 364                 input_event(hdata->input, EV_ABS, ABS_MT_POSITION_Y, y);
 365                 input_event(hdata->input, EV_ABS, ABS_MT_ORIENTATION, wide);
 366                 input_event(hdata->input, EV_ABS, ABS_MT_PRESSURE, z);
 367                 input_event(hdata->input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 368                 input_event(hdata->input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 369         }
 370 }
 371
 372 static int rmi_reset_attn_mode(struct hid_device *hdev)
 373 {
 374         struct rmi_data *data = hid_get_drvdata(hdev);
 375         int ret;
 376
 377         ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
 378         if (ret)
 379                 return ret;
 380
 381         if (data->restore_interrupt_mask) {
 382                 ret = rmi_write(hdev, data->f01.control_base_addr + 1,
 383                                 &data->interrupt_enable_mask);
 384                 if (ret) {
 385                         hid_err(hdev, "can not write F01 control register\n");
 386                         return ret;
 387                 }
 388         }
 389
 390         return 0;
 391 }
 392
 393 static void rmi_reset_work(struct work_struct *work)
 394 {
 395         struct rmi_data *hdata = container_of(work, struct rmi_data,
 396                                                 reset_work);
 397
 398         /* switch the device to RMI if we receive a generic mouse report */
 399         rmi_reset_attn_mode(hdata->hdev);
 400 }
 401
 402 static inline int rmi_schedule_reset(struct hid_device *hdev)
 403 {
 404         struct rmi_data *hdata = hid_get_drvdata(hdev);
 405         return schedule_work(&hdata->reset_work);
 406 }
 407
 408 static int rmi_f11_input_event(struct hid_device *hdev, u8 irq, u8 *data,
 409                 int size)
 410 {
 411         struct rmi_data *hdata = hid_get_drvdata(hdev);
 412         int offset;
 413         int i;
 414
 415         if (!(irq & hdata->f11.irq_mask) || size <= 0)
 416                 return 0;
 417
 418         offset = (hdata->max_fingers >> 2) + 1;
 419         for (i = 0; i < hdata->max_fingers; i++) {
 420                 int fs_byte_position = i >> 2;
 421                 int fs_bit_position = (i & 0x3) << 1;
 422                 int finger_state = (data[fs_byte_position] >> fs_bit_position) &
 423                                         0x03;
 424                 int position = offset + 5 * i;
 425
 426                 if (position + 5 > size) {
 427                         /* partial report, go on with what we received */
 428                         printk_once(KERN_WARNING
 429                                 "%s %s: Detected incomplete finger report. Finger reports may occasionally get dropped on this platform.\n",
 430                                  dev_driver_string(&hdev->dev),
 431                                  dev_name(&hdev->dev));
 432                         hid_dbg(hdev, "Incomplete finger report\n");
 433                         break;
 434                 }
 435
 436                 rmi_f11_process_touch(hdata, i, finger_state, &data[position]);
 437         }
 438         input_mt_sync_frame(hdata->input);
 439         input_sync(hdata->input);
 440         return hdata->f11.report_size;
 441 }
 442
 443 static int rmi_f30_input_event(struct hid_device *hdev, u8 irq, u8 *data,
 444                 int size)
 445 {
 446         struct rmi_data *hdata = hid_get_drvdata(hdev);
 447         int i;
 448         int button = 0;
 449         bool value;
 450
 451         if (!(irq & hdata->f30.irq_mask))
 452                 return 0;
 453
 454         if (size < (int)hdata->f30.report_size) {
 455                 hid_warn(hdev, "Click Button pressed, but the click data is missing\n");
 456                 return 0;
 457         }
 458
 459         for (i = 0; i < hdata->gpio_led_count; i++) {
 460                 if (test_bit(i, &hdata->button_mask)) {
 461                         value = (data[i / 8] >> (i & 0x07)) & BIT(0);
 462                         if (test_bit(i, &hdata->button_state_mask))
 463                                 value = !value;
 464                         input_event(hdata->input, EV_KEY, BTN_LEFT + button++,
 465                                         value);
 466                 }
 467         }
 468         return hdata->f30.report_size;
 469 }
 470
 471 static int rmi_input_event(struct hid_device *hdev, u8 *data, int size)
 472 {
 473         struct rmi_data *hdata = hid_get_drvdata(hdev);
 474         unsigned long irq_mask = 0;
 475         unsigned index = 2;
 476
 477         if (!(test_bit(RMI_STARTED, &hdata->flags)))
 478                 return 0;
 479
 480         irq_mask |= hdata->f11.irq_mask;
 481         irq_mask |= hdata->f30.irq_mask;
 482
 483         if (data[1] & ~irq_mask)
 484                 hid_dbg(hdev, "unknown intr source:%02lx %s:%d\n",
 485                         data[1] & ~irq_mask, __FILE__, __LINE__);
 486
 487         if (hdata->f11.interrupt_base < hdata->f30.interrupt_base) {
 488                 index += rmi_f11_input_event(hdev, data[1], &data[index],
 489                                 size - index);
 490                 index += rmi_f30_input_event(hdev, data[1], &data[index],
 491                                 size - index);
 492         } else {
 493                 index += rmi_f30_input_event(hdev, data[1], &data[index],
 494                                 size - index);
 495                 index += rmi_f11_input_event(hdev, data[1], &data[index],
 496                                 size - index);
 497         }
 498
 499         return 1;
 500 }
 501
 502 static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size)
 503 {
 504         struct rmi_data *hdata = hid_get_drvdata(hdev);
 505
 506         if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) {
 507                 hid_dbg(hdev, "no read request pending\n");
 508                 return 0;
 509         }
 510
 511         memcpy(hdata->readReport, data, size < hdata->input_report_size ?
 512                         size : hdata->input_report_size);
 513         set_bit(RMI_READ_DATA_PENDING, &hdata->flags);
 514         wake_up(&hdata->wait);
 515
 516         return 1;
 517 }
 518
 519 static int rmi_check_sanity(struct hid_device *hdev, u8 *data, int size)
 520 {
 521         int valid_size = size;
 522         /*
 523          * On the Dell XPS 13 9333, the bus sometimes get confused and fills
 524          * the report with a sentinel value "ff". Synaptics told us that such
 525          * behavior does not comes from the touchpad itself, so we filter out
 526          * such reports here.
 527          */
 528
 529         while ((data[valid_size - 1] == 0xff) && valid_size > 0)
 530                 valid_size--;
 531
 532         return valid_size;
 533 }
 534
 535 static int rmi_raw_event(struct hid_device *hdev,
 536                 struct hid_report *report, u8 *data, int size)
 537 {
 538         size = rmi_check_sanity(hdev, data, size);
 539         if (size < 2)
 540                 return 0;
 541
 542         switch (data[0]) {
 543         case RMI_READ_DATA_REPORT_ID:
 544                 return rmi_read_data_event(hdev, data, size);
 545         case RMI_ATTN_REPORT_ID:
 546                 return rmi_input_event(hdev, data, size);
 547         default:
 548                 return 1;
 549         }
 550
 551         return 0;
 552 }
 553
 554 static int rmi_event(struct hid_device *hdev, struct hid_field *field,
 555                         struct hid_usage *usage, __s32 value)
 556 {
 557         struct rmi_data *data = hid_get_drvdata(hdev);
 558
 559         if ((data->device_flags & RMI_DEVICE) &&
 560             (field->application == HID_GD_POINTER ||
 561             field->application == HID_GD_MOUSE)) {
 562                 if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) {
 563                         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 564                                 return 0;
 565
 566                         if ((usage->hid == HID_GD_X || usage->hid == HID_GD_Y)
 567                             && !value)
 568                                 return 1;
 569                 }
 570
 571                 rmi_schedule_reset(hdev);
 572                 return 1;
 573         }
 574
 575         return 0;
 576 }
 577
 578 #ifdef CONFIG_PM
 579 static int rmi_set_sleep_mode(struct hid_device *hdev, int sleep_mode)
 580 {
 581         struct rmi_data *data = hid_get_drvdata(hdev);
 582         int ret;
 583         u8 f01_ctrl0;
 584
 585         f01_ctrl0 = (data->f01_ctrl0 & ~0x3) | sleep_mode;
 586
 587         ret = rmi_write(hdev, data->f01.control_base_addr,
 588                         &f01_ctrl0);
 589         if (ret) {
 590                 hid_err(hdev, "can not write sleep mode\n");
 591                 return ret;
 592         }
 593
 594         return 0;
 595 }
 596
 597 static int rmi_suspend(struct hid_device *hdev, pm_message_t message)
 598 {
 599         struct rmi_data *data = hid_get_drvdata(hdev);
 600         int ret;
 601         u8 buf[RMI_F11_CTRL_REG_COUNT];
 602
 603         if (!(data->device_flags & RMI_DEVICE))
 604                 return 0;
 605
 606         ret = rmi_read_block(hdev, data->f11.control_base_addr, buf,
 607                                 RMI_F11_CTRL_REG_COUNT);
 608         if (ret)
 609                 hid_warn(hdev, "can not read F11 control registers\n");
 610         else
 611                 memcpy(data->f11_ctrl_regs, buf, RMI_F11_CTRL_REG_COUNT);
 612
 613
 614         if (!device_may_wakeup(hdev->dev.parent))
 615                 return rmi_set_sleep_mode(hdev, RMI_SLEEP_DEEP_SLEEP);
 616
 617         return 0;
 618 }
 619
 620 static int rmi_post_reset(struct hid_device *hdev)
 621 {
 622         struct rmi_data *data = hid_get_drvdata(hdev);
 623         int ret;
 624
 625         if (!(data->device_flags & RMI_DEVICE))
 626                 return 0;
 627
 628         ret = rmi_reset_attn_mode(hdev);
 629         if (ret) {
 630                 hid_err(hdev, "can not set rmi mode\n");
 631                 return ret;
 632         }
 633
 634         if (data->read_f11_ctrl_regs) {
 635                 ret = rmi_write_block(hdev, data->f11.control_base_addr,
 636                                 data->f11_ctrl_regs, RMI_F11_CTRL_REG_COUNT);
 637                 if (ret)
 638                         hid_warn(hdev,
 639                                 "can not write F11 control registers after reset\n");
 640         }
 641
 642         if (!device_may_wakeup(hdev->dev.parent)) {
 643                 ret = rmi_set_sleep_mode(hdev, RMI_SLEEP_NORMAL);
 644                 if (ret) {
 645                         hid_err(hdev, "can not write sleep mode\n");
 646                         return ret;
 647                 }
 648         }
 649
 650         return ret;
 651 }
 652
 653 static int rmi_post_resume(struct hid_device *hdev)
 654 {
 655         struct rmi_data *data = hid_get_drvdata(hdev);
 656
 657         if (!(data->device_flags & RMI_DEVICE))
 658                 return 0;
 659
 660         return rmi_reset_attn_mode(hdev);
 661 }
 662 #endif /* CONFIG_PM */
 663
 664 #define RMI4_MAX_PAGE 0xff
 665 #define RMI4_PAGE_SIZE 0x0100
 666
 667 #define PDT_START_SCAN_LOCATION 0x00e9
 668 #define PDT_END_SCAN_LOCATION   0x0005
 669 #define RMI4_END_OF_PDT(id) ((id) == 0x00 || (id) == 0xff)
 670
 671 struct pdt_entry {
 672         u8 query_base_addr:8;
 673         u8 command_base_addr:8;
 674         u8 control_base_addr:8;
 675         u8 data_base_addr:8;
 676         u8 interrupt_source_count:3;
 677         u8 bits3and4:2;
 678         u8 function_version:2;
 679         u8 bit7:1;
 680         u8 function_number:8;
 681 } __attribute__((__packed__));
 682
 683 static inline unsigned long rmi_gen_mask(unsigned irq_base, unsigned irq_count)
 684 {
 685         return GENMASK(irq_count + irq_base - 1, irq_base);
 686 }
 687
 688 static void rmi_register_function(struct rmi_data *data,
 689         struct pdt_entry *pdt_entry, int page, unsigned interrupt_count)
 690 {
 691         struct rmi_function *f = NULL;
 692         u16 page_base = page << 8;
 693
 694         switch (pdt_entry->function_number) {
 695         case 0x01:
 696                 f = &data->f01;
 697                 break;
 698         case 0x11:
 699                 f = &data->f11;
 700                 break;
 701         case 0x30:
 702                 f = &data->f30;
 703                 break;
 704         }
 705
 706         if (f) {
 707                 f->page = page;
 708                 f->query_base_addr = page_base | pdt_entry->query_base_addr;
 709                 f->command_base_addr = page_base | pdt_entry->command_base_addr;
 710                 f->control_base_addr = page_base | pdt_entry->control_base_addr;
 711                 f->data_base_addr = page_base | pdt_entry->data_base_addr;
 712                 f->interrupt_base = interrupt_count;
 713                 f->interrupt_count = pdt_entry->interrupt_source_count;
 714                 f->irq_mask = rmi_gen_mask(f->interrupt_base,
 715                                                 f->interrupt_count);
 716                 data->interrupt_enable_mask |= f->irq_mask;
 717         }
 718 }
 719
 720 static int rmi_scan_pdt(struct hid_device *hdev)
 721 {
 722         struct rmi_data *data = hid_get_drvdata(hdev);
 723         struct pdt_entry entry;
 724         int page;
 725         bool page_has_function;
 726         int i;
 727         int retval;
 728         int interrupt = 0;
 729         u16 page_start, pdt_start , pdt_end;
 730
 731         hid_info(hdev, "Scanning PDT...\n");
 732
 733         for (page = 0; (page <= RMI4_MAX_PAGE); page++) {
 734                 page_start = RMI4_PAGE_SIZE * page;
 735                 pdt_start = page_start + PDT_START_SCAN_LOCATION;
 736                 pdt_end = page_start + PDT_END_SCAN_LOCATION;
 737
 738                 page_has_function = false;
 739                 for (i = pdt_start; i >= pdt_end; i -= sizeof(entry)) {
 740                         retval = rmi_read_block(hdev, i, &entry, sizeof(entry));
 741                         if (retval) {
 742                                 hid_err(hdev,
 743                                         "Read of PDT entry at %#06x failed.\n",
 744                                         i);
 745                                 goto error_exit;
 746                         }
 747
 748                         if (RMI4_END_OF_PDT(entry.function_number))
 749                                 break;
 750
 751                         page_has_function = true;
 752
 753                         hid_info(hdev, "Found F%02X on page %#04x\n",
 754                                         entry.function_number, page);
 755
 756                         rmi_register_function(data, &entry, page, interrupt);
 757                         interrupt += entry.interrupt_source_count;
 758                 }
 759
 760                 if (!page_has_function)
 761                         break;
 762         }
 763
 764         hid_info(hdev, "%s: Done with PDT scan.\n", __func__);
 765         retval = 0;
 766
 767 error_exit:
 768         return retval;
 769 }
 770
 771 #define RMI_DEVICE_F01_BASIC_QUERY_LEN  11
 772
 773 static int rmi_populate_f01(struct hid_device *hdev)
 774 {
 775         struct rmi_data *data = hid_get_drvdata(hdev);
 776         u8 basic_queries[RMI_DEVICE_F01_BASIC_QUERY_LEN];
 777         u8 info[3];
 778         int ret;
 779         bool has_query42;
 780         bool has_lts;
 781         bool has_sensor_id;
 782         bool has_ds4_queries = false;
 783         bool has_build_id_query = false;
 784         bool has_package_id_query = false;
 785         u16 query_offset = data->f01.query_base_addr;
 786         u16 prod_info_addr;
 787         u8 ds4_query_len;
 788
 789         ret = rmi_read_block(hdev, query_offset, basic_queries,
 790                                 RMI_DEVICE_F01_BASIC_QUERY_LEN);
 791         if (ret) {
 792                 hid_err(hdev, "Can not read basic queries from Function 0x1.\n");
 793                 return ret;
 794         }
 795
 796         has_lts = !!(basic_queries[0] & BIT(2));
 797         has_sensor_id = !!(basic_queries[1] & BIT(3));
 798         has_query42 = !!(basic_queries[1] & BIT(7));
 799
 800         query_offset += 11;
 801         prod_info_addr = query_offset + 6;
 802         query_offset += 10;
 803
 804         if (has_lts)
 805                 query_offset += 20;
 806
 807         if (has_sensor_id)
 808                 query_offset++;
 809
 810         if (has_query42) {
 811                 ret = rmi_read(hdev, query_offset, info);
 812                 if (ret) {
 813                         hid_err(hdev, "Can not read query42.\n");
 814                         return ret;
 815                 }
 816                 has_ds4_queries = !!(info[0] & BIT(0));
 817                 query_offset++;
 818         }
 819
 820         if (has_ds4_queries) {
 821                 ret = rmi_read(hdev, query_offset, &ds4_query_len);
 822                 if (ret) {
 823                         hid_err(hdev, "Can not read DS4 Query length.\n");
 824                         return ret;
 825                 }
 826                 query_offset++;
 827
 828                 if (ds4_query_len > 0) {
 829                         ret = rmi_read(hdev, query_offset, info);
 830                         if (ret) {
 831                                 hid_err(hdev, "Can not read DS4 query.\n");
 832                                 return ret;
 833                         }
 834
 835                         has_package_id_query = !!(info[0] & BIT(0));
 836                         has_build_id_query = !!(info[0] & BIT(1));
 837                 }
 838         }
 839
 840         if (has_package_id_query)
 841                 prod_info_addr++;
 842
 843         if (has_build_id_query) {
 844                 ret = rmi_read_block(hdev, prod_info_addr, info, 3);
 845                 if (ret) {
 846                         hid_err(hdev, "Can not read product info.\n");
 847                         return ret;
 848                 }
 849
 850                 data->firmware_id = info[1] << 8 | info[0];
 851                 data->firmware_id += info[2] * 65536;
 852         }
 853
 854         ret = rmi_read_block(hdev, data->f01.control_base_addr, info,
 855                                 2);
 856
 857         if (ret) {
 858                 hid_err(hdev, "can not read f01 ctrl registers\n");
 859                 return ret;
 860         }
 861
 862         data->f01_ctrl0 = info[0];
 863
 864         if (!info[1]) {
 865                 /*
 866                  * Do to a firmware bug in some touchpads the F01 interrupt
 867                  * enable control register will be cleared on reset.
 868                  * This will stop the touchpad from reporting data, so
 869                  * if F01 CTRL1 is 0 then we need to explicitly enable
 870                  * interrupts for the functions we want data for.
 871                  */
 872                 data->restore_interrupt_mask = true;
 873
 874                 ret = rmi_write(hdev, data->f01.control_base_addr + 1,
 875                                 &data->interrupt_enable_mask);
 876                 if (ret) {
 877                         hid_err(hdev, "can not write to control reg 1: %d.\n",
 878                                 ret);
 879                         return ret;
 880                 }
 881         }
 882
 883         return 0;
 884 }
 885
 886 static int rmi_populate_f11(struct hid_device *hdev)
 887 {
 888         struct rmi_data *data = hid_get_drvdata(hdev);
 889         u8 buf[20];
 890         int ret;
 891         bool has_query9;
 892         bool has_query10 = false;
 893         bool has_query11;
 894         bool has_query12;
 895         bool has_query27;
 896         bool has_query28;
 897         bool has_query36 = false;
 898         bool has_physical_props;
 899         bool has_gestures;
 900         bool has_rel;
 901         bool has_data40 = false;
 902         bool has_dribble = false;
 903         bool has_palm_detect = false;
 904         unsigned x_size, y_size;
 905         u16 query_offset;
 906
 907         if (!data->f11.query_base_addr) {
 908                 hid_err(hdev, "No 2D sensor found, giving up.\n");
 909                 return -ENODEV;
 910         }
 911
 912         /* query 0 contains some useful information */
 913         ret = rmi_read(hdev, data->f11.query_base_addr, buf);
 914         if (ret) {
 915                 hid_err(hdev, "can not get query 0: %d.\n", ret);
 916                 return ret;
 917         }
 918         has_query9 = !!(buf[0] & BIT(3));
 919         has_query11 = !!(buf[0] & BIT(4));
 920         has_query12 = !!(buf[0] & BIT(5));
 921         has_query27 = !!(buf[0] & BIT(6));
 922         has_query28 = !!(buf[0] & BIT(7));
 923
 924         /* query 1 to get the max number of fingers */
 925         ret = rmi_read(hdev, data->f11.query_base_addr + 1, buf);
 926         if (ret) {
 927                 hid_err(hdev, "can not get NumberOfFingers: %d.\n", ret);
 928                 return ret;
 929         }
 930         data->max_fingers = (buf[0] & 0x07) + 1;
 931         if (data->max_fingers > 5)
 932                 data->max_fingers = 10;
 933
 934         data->f11.report_size = data->max_fingers * 5 +
 935                                 DIV_ROUND_UP(data->max_fingers, 4);
 936
 937         if (!(buf[0] & BIT(4))) {
 938                 hid_err(hdev, "No absolute events, giving up.\n");
 939                 return -ENODEV;
 940         }
 941
 942         has_rel = !!(buf[0] & BIT(3));
 943         has_gestures = !!(buf[0] & BIT(5));
 944
 945         ret = rmi_read(hdev, data->f11.query_base_addr + 5, buf);
 946         if (ret) {
 947                 hid_err(hdev, "can not get absolute data sources: %d.\n", ret);
 948                 return ret;
 949         }
 950
 951         has_dribble = !!(buf[0] & BIT(4));
 952
 953         /*
 954          * At least 4 queries are guaranteed to be present in F11
 955          * +1 for query 5 which is present since absolute events are
 956          * reported and +1 for query 12.
 957          */
 958         query_offset = 6;
 959
 960         if (has_rel)
 961                 ++query_offset; /* query 6 is present */
 962
 963         if (has_gestures) {
 964                 /* query 8 to find out if query 10 exists */
 965                 ret = rmi_read(hdev,
 966                         data->f11.query_base_addr + query_offset + 1, buf);
 967                 if (ret) {
 968                         hid_err(hdev, "can not read gesture information: %d.\n",
 969                                 ret);
 970                         return ret;
 971                 }
 972                 has_palm_detect = !!(buf[0] & BIT(0));
 973                 has_query10 = !!(buf[0] & BIT(2));
 974
 975                 query_offset += 2; /* query 7 and 8 are present */
 976         }
 977
 978         if (has_query9)
 979                 ++query_offset;
 980
 981         if (has_query10)
 982                 ++query_offset;
 983
 984         if (has_query11)
 985                 ++query_offset;
 986
 987         /* query 12 to know if the physical properties are reported */
 988         if (has_query12) {
 989                 ret = rmi_read(hdev, data->f11.query_base_addr
 990                                 + query_offset, buf);
 991                 if (ret) {
 992                         hid_err(hdev, "can not get query 12: %d.\n", ret);
 993                         return ret;
 994                 }
 995                 has_physical_props = !!(buf[0] & BIT(5));
 996
 997                 if (has_physical_props) {
 998                         query_offset += 1;
 999                         ret = rmi_read_block(hdev,
1000                                         data->f11.query_base_addr
1001                                                 + query_offset, buf, 4);
1002                         if (ret) {
1003                                 hid_err(hdev, "can not read query 15-18: %d.\n",
1004                                         ret);
1005                                 return ret;
1006                         }
1007
1008                         x_size = buf[0] | (buf[1] << 8);
1009                         y_size = buf[2] | (buf[3] << 8);
1010
1011                         data->x_size_mm = DIV_ROUND_CLOSEST(x_size, 10);
1012                         data->y_size_mm = DIV_ROUND_CLOSEST(y_size, 10);
1013
1014                         hid_info(hdev, "%s: size in mm: %d x %d\n",
1015                                  __func__, data->x_size_mm, data->y_size_mm);
1016
1017                         /*
1018                          * query 15 - 18 contain the size of the sensor
1019                          * and query 19 - 26 contain bezel dimensions
1020                          */
1021                         query_offset += 12;
1022                 }
1023         }
1024
1025         if (has_query27)
1026                 ++query_offset;
1027
1028         if (has_query28) {
1029                 ret = rmi_read(hdev, data->f11.query_base_addr
1030                                 + query_offset, buf);
1031                 if (ret) {
1032                         hid_err(hdev, "can not get query 28: %d.\n", ret);
1033                         return ret;
1034                 }
1035
1036                 has_query36 = !!(buf[0] & BIT(6));
1037         }
1038
1039         if (has_query36) {
1040                 query_offset += 2;
1041                 ret = rmi_read(hdev, data->f11.query_base_addr
1042                                 + query_offset, buf);
1043                 if (ret) {
1044                         hid_err(hdev, "can not get query 36: %d.\n", ret);
1045                         return ret;
1046                 }
1047
1048                 has_data40 = !!(buf[0] & BIT(5));
1049         }
1050
1051
1052         if (has_data40)
1053                 data->f11.report_size += data->max_fingers * 2;
1054
1055         ret = rmi_read_block(hdev, data->f11.control_base_addr,
1056                         data->f11_ctrl_regs, RMI_F11_CTRL_REG_COUNT);
1057         if (ret) {
1058                 hid_err(hdev, "can not read ctrl block of size 11: %d.\n", ret);
1059                 return ret;
1060         }
1061
1062         /* data->f11_ctrl_regs now contains valid register data */
1063         data->read_f11_ctrl_regs = true;
1064
1065         data->max_x = data->f11_ctrl_regs[6] | (data->f11_ctrl_regs[7] << 8);
1066         data->max_y = data->f11_ctrl_regs[8] | (data->f11_ctrl_regs[9] << 8);
1067
1068         if (has_dribble) {
1069                 data->f11_ctrl_regs[0] = data->f11_ctrl_regs[0] & ~BIT(6);
1070                 ret = rmi_write(hdev, data->f11.control_base_addr,
1071                                 data->f11_ctrl_regs);
1072                 if (ret) {
1073                         hid_err(hdev, "can not write to control reg 0: %d.\n",
1074                                 ret);
1075                         return ret;
1076                 }
1077         }
1078
1079         if (has_palm_detect) {
1080                 data->f11_ctrl_regs[11] = data->f11_ctrl_regs[11] & ~BIT(0);
1081                 ret = rmi_write(hdev, data->f11.control_base_addr + 11,
1082                                 &data->f11_ctrl_regs[11]);
1083                 if (ret) {
1084                         hid_err(hdev, "can not write to control reg 11: %d.\n",
1085                                 ret);
1086                         return ret;
1087                 }
1088         }
1089
1090         return 0;
1091 }
1092
1093 static int rmi_populate_f30(struct hid_device *hdev)
1094 {
1095         struct rmi_data *data = hid_get_drvdata(hdev);
1096         u8 buf[20];
1097         int ret;
1098         bool has_gpio, has_led;
1099         unsigned bytes_per_ctrl;
1100         u8 ctrl2_addr;
1101         int ctrl2_3_length;
1102         int i;
1103
1104         /* function F30 is for physical buttons */
1105         if (!data->f30.query_base_addr) {
1106                 hid_err(hdev, "No GPIO/LEDs found, giving up.\n");
1107                 return -ENODEV;
1108         }
1109
1110         ret = rmi_read_block(hdev, data->f30.query_base_addr, buf, 2);
1111         if (ret) {
1112                 hid_err(hdev, "can not get F30 query registers: %d.\n", ret);
1113                 return ret;
1114         }
1115
1116         has_gpio = !!(buf[0] & BIT(3));
1117         has_led = !!(buf[0] & BIT(2));
1118         data->gpio_led_count = buf[1] & 0x1f;
1119
1120         /* retrieve ctrl 2 & 3 registers */
1121         bytes_per_ctrl = (data->gpio_led_count + 7) / 8;
1122         /* Ctrl0 is present only if both has_gpio and has_led are set*/
1123         ctrl2_addr = (has_gpio && has_led) ? bytes_per_ctrl : 0;
1124         /* Ctrl1 is always be present */
1125         ctrl2_addr += bytes_per_ctrl;
1126         ctrl2_3_length = 2 * bytes_per_ctrl;
1127
1128         data->f30.report_size = bytes_per_ctrl;
1129
1130         ret = rmi_read_block(hdev, data->f30.control_base_addr + ctrl2_addr,
1131                                 buf, ctrl2_3_length);
1132         if (ret) {
1133                 hid_err(hdev, "can not read ctrl 2&3 block of size %d: %d.\n",
1134                         ctrl2_3_length, ret);
1135                 return ret;
1136         }
1137
1138         for (i = 0; i < data->gpio_led_count; i++) {
1139                 int byte_position = i >> 3;
1140                 int bit_position = i & 0x07;
1141                 u8 dir_byte = buf[byte_position];
1142                 u8 data_byte = buf[byte_position + bytes_per_ctrl];
1143                 bool dir = (dir_byte >> bit_position) & BIT(0);
1144                 bool dat = (data_byte >> bit_position) & BIT(0);
1145
1146                 if (dir == 0) {
1147                         /* input mode */
1148                         if (dat) {
1149                                 /* actual buttons have pull up resistor */
1150                                 data->button_count++;
1151                                 set_bit(i, &data->button_mask);
1152                                 set_bit(i, &data->button_state_mask);
1153                         }
1154                 }
1155
1156         }
1157
1158         return 0;
1159 }
1160
1161 static int rmi_populate(struct hid_device *hdev)
1162 {
1163         struct rmi_data *data = hid_get_drvdata(hdev);
1164         int ret;
1165
1166         ret = rmi_scan_pdt(hdev);
1167         if (ret) {
1168                 hid_err(hdev, "PDT scan failed with code %d.\n", ret);
1169                 return ret;
1170         }
1171
1172         ret = rmi_populate_f01(hdev);
1173         if (ret) {
1174                 hid_err(hdev, "Error while initializing F01 (%d).\n", ret);
1175                 return ret;
1176         }
1177
1178         ret = rmi_populate_f11(hdev);
1179         if (ret) {
1180                 hid_err(hdev, "Error while initializing F11 (%d).\n", ret);
1181                 return ret;
1182         }
1183
1184         if (!(data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS)) {
1185                 ret = rmi_populate_f30(hdev);
1186                 if (ret)
1187                         hid_warn(hdev, "Error while initializing F30 (%d).\n", ret);
1188         }
1189
1190         return 0;
1191 }
1192
1193 static int rmi_input_configured(struct hid_device *hdev, struct hid_input *hi)
1194 {
1195         struct rmi_data *data = hid_get_drvdata(hdev);
1196         struct input_dev *input = hi->input;
1197         int ret;
1198         int res_x, res_y, i;
1199
1200         data->input = input;
1201
1202         hid_dbg(hdev, "Opening low level driver\n");
1203         ret = hid_hw_open(hdev);
1204         if (ret)
1205                 return ret;
1206
1207         if (!(data->device_flags & RMI_DEVICE))
1208                 return 0;
1209
1210         /* Allow incoming hid reports */
1211         hid_device_io_start(hdev);
1212
1213         ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
1214         if (ret < 0) {
1215                 dev_err(&hdev->dev, "failed to set rmi mode\n");
1216                 goto exit;
1217         }
1218
1219         ret = rmi_set_page(hdev, 0);
1220         if (ret < 0) {
1221                 dev_err(&hdev->dev, "failed to set page select to 0.\n");
1222                 goto exit;
1223         }
1224
1225         ret = rmi_populate(hdev);
1226         if (ret)
1227                 goto exit;
1228
1229         hid_info(hdev, "firmware id: %ld\n", data->firmware_id);
1230
1231         __set_bit(EV_ABS, input->evbit);
1232         input_set_abs_params(input, ABS_MT_POSITION_X, 1, data->max_x, 0, 0);
1233         input_set_abs_params(input, ABS_MT_POSITION_Y, 1, data->max_y, 0, 0);
1234
1235         if (data->x_size_mm && data->y_size_mm) {
1236                 res_x = (data->max_x - 1) / data->x_size_mm;
1237                 res_y = (data->max_y - 1) / data->y_size_mm;
1238
1239                 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
1240                 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
1241         }
1242
1243         input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0);
1244         input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0);
1245         input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0);
1246         input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0);
1247
1248         ret = input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
1249         if (ret < 0)
1250                 goto exit;
1251
1252         if (data->button_count) {
1253                 __set_bit(EV_KEY, input->evbit);
1254                 for (i = 0; i < data->button_count; i++)
1255                         __set_bit(BTN_LEFT + i, input->keybit);
1256
1257                 if (data->button_count == 1)
1258                         __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1259         }
1260
1261         set_bit(RMI_STARTED, &data->flags);
1262
1263 exit:
1264         hid_device_io_stop(hdev);
1265         hid_hw_close(hdev);
1266         return ret;
1267 }
1268
1269 static int rmi_input_mapping(struct hid_device *hdev,
1270                 struct hid_input *hi, struct hid_field *field,
1271                 struct hid_usage *usage, unsigned long **bit, int *max)
1272 {
1273         struct rmi_data *data = hid_get_drvdata(hdev);
1274
1275         /*
1276          * we want to make HID ignore the advertised HID collection
1277          * for RMI deivces
1278          */
1279         if (data->device_flags & RMI_DEVICE) {
1280                 if ((data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) &&
1281                     ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON))
1282                         return 0;
1283
1284                 return -1;
1285         }
1286
1287         return 0;
1288 }
1289
1290 static int rmi_check_valid_report_id(struct hid_device *hdev, unsigned type,
1291                 unsigned id, struct hid_report **report)
1292 {
1293         int i;
1294
1295         *report = hdev->report_enum[type].report_id_hash[id];
1296         if (*report) {
1297                 for (i = 0; i < (*report)->maxfield; i++) {
1298                         unsigned app = (*report)->field[i]->application;
1299                         if ((app & HID_USAGE_PAGE) >= HID_UP_MSVENDOR)
1300                                 return 1;
1301                 }
1302         }
1303
1304         return 0;
1305 }
1306
1307 static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
1308 {
1309         struct rmi_data *data = NULL;
1310         int ret;
1311         size_t alloc_size;
1312         struct hid_report *input_report;
1313         struct hid_report *output_report;
1314         struct hid_report *feature_report;
1315
1316         data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL);
1317         if (!data)
1318                 return -ENOMEM;
1319
1320         INIT_WORK(&data->reset_work, rmi_reset_work);
1321         data->hdev = hdev;
1322
1323         hid_set_drvdata(hdev, data);
1324
1325         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1326
1327         ret = hid_parse(hdev);
1328         if (ret) {
1329                 hid_err(hdev, "parse failed\n");
1330                 return ret;
1331         }
1332
1333         if (id->driver_data)
1334                 data->device_flags = id->driver_data;
1335
1336         /*
1337          * Check for the RMI specific report ids. If they are misisng
1338          * simply return and let the events be processed by hid-input
1339          */
1340         if (!rmi_check_valid_report_id(hdev, HID_FEATURE_REPORT,
1341             RMI_SET_RMI_MODE_REPORT_ID, &feature_report)) {
1342                 hid_dbg(hdev, "device does not have set mode feature report\n");
1343                 goto start;
1344         }
1345
1346         if (!rmi_check_valid_report_id(hdev, HID_INPUT_REPORT,
1347             RMI_ATTN_REPORT_ID, &input_report)) {
1348                 hid_dbg(hdev, "device does not have attention input report\n");
1349                 goto start;
1350         }
1351
1352         data->input_report_size = hid_report_len(input_report);
1353
1354         if (!rmi_check_valid_report_id(hdev, HID_OUTPUT_REPORT,
1355             RMI_WRITE_REPORT_ID, &output_report)) {
1356                 hid_dbg(hdev,
1357                         "device does not have rmi write output report\n");
1358                 goto start;
1359         }
1360
1361         data->output_report_size = hid_report_len(output_report);
1362
1363         data->device_flags |= RMI_DEVICE;
1364         alloc_size = data->output_report_size + data->input_report_size;
1365
1366         data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL);
1367         if (!data->writeReport) {
1368                 ret = -ENOMEM;
1369                 return ret;
1370         }
1371
1372         data->readReport = data->writeReport + data->output_report_size;
1373
1374         init_waitqueue_head(&data->wait);
1375
1376         mutex_init(&data->page_mutex);
1377
1378 start:
1379         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1380         if (ret) {
1381                 hid_err(hdev, "hw start failed\n");
1382                 return ret;
1383         }
1384
1385         if ((data->device_flags & RMI_DEVICE) &&
1386             !test_bit(RMI_STARTED, &data->flags))
1387                 /*
1388                  * The device maybe in the bootloader if rmi_input_configured
1389                  * failed to find F11 in the PDT. Print an error, but don't
1390                  * return an error from rmi_probe so that hidraw will be
1391                  * accessible from userspace. That way a userspace tool
1392                  * can be used to reload working firmware on the touchpad.
1393                  */
1394                 hid_err(hdev, "Device failed to be properly configured\n");
1395
1396         return 0;
1397 }
1398
1399 static void rmi_remove(struct hid_device *hdev)
1400 {
1401         struct rmi_data *hdata = hid_get_drvdata(hdev);
1402
1403         clear_bit(RMI_STARTED, &hdata->flags);
1404
1405         hid_hw_stop(hdev);
1406 }
1407
1408 static const struct hid_device_id rmi_id[] = {
1409         { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14),
1410                 .driver_data = RMI_DEVICE_HAS_PHYS_BUTTONS },
1411         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) },
1412         { }
1413 };
1414 MODULE_DEVICE_TABLE(hid, rmi_id);
1415
1416 static struct hid_driver rmi_driver = {
1417         .name = "hid-rmi",
1418         .id_table               = rmi_id,
1419         .probe                  = rmi_probe,
1420         .remove                 = rmi_remove,
1421         .event                  = rmi_event,
1422         .raw_event              = rmi_raw_event,
1423         .input_mapping          = rmi_input_mapping,
1424         .input_configured       = rmi_input_configured,
1425 #ifdef CONFIG_PM
1426         .suspend                = rmi_suspend,
1427         .resume                 = rmi_post_resume,
1428         .reset_resume           = rmi_post_reset,
1429 #endif
1430 };
1431
1432 module_hid_driver(rmi_driver);
1433
1434 MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>");
1435 MODULE_DESCRIPTION("RMI HID driver");
1436 MODULE_LICENSE("GPL");