drivers/hid/hid-alps.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/hid.h>
   8 #include <linux/input.h>
   9 #include <linux/input/mt.h>
  10 #include <linux/module.h>
  11 #include <asm/unaligned.h>
  12 #include "hid-ids.h"
  13
  14 /* ALPS Device Product ID */
  15 #define HID_PRODUCT_ID_T3_BTNLESS       0xD0C0
  16 #define HID_PRODUCT_ID_COSMO            0x1202
  17 #define HID_PRODUCT_ID_U1_PTP_1         0x1207
  18 #define HID_PRODUCT_ID_U1                       0x1209
  19 #define HID_PRODUCT_ID_U1_PTP_2         0x120A
  20 #define HID_PRODUCT_ID_U1_DUAL          0x120B
  21 #define HID_PRODUCT_ID_T4_BTNLESS       0x120C
  22
  23 #define DEV_SINGLEPOINT                         0x01
  24 #define DEV_DUALPOINT                           0x02
  25
  26 #define U1_MOUSE_REPORT_ID                      0x01 /* Mouse data ReportID */
  27 #define U1_ABSOLUTE_REPORT_ID           0x03 /* Absolute data ReportID */
  28 #define U1_FEATURE_REPORT_ID            0x05 /* Feature ReportID */
  29 #define U1_SP_ABSOLUTE_REPORT_ID        0x06 /* Feature ReportID */
  30
  31 #define U1_FEATURE_REPORT_LEN           0x08 /* Feature Report Length */
  32 #define U1_FEATURE_REPORT_LEN_ALL       0x0A
  33 #define U1_CMD_REGISTER_READ            0xD1
  34 #define U1_CMD_REGISTER_WRITE           0xD2
  35
  36 #define U1_DEVTYPE_SP_SUPPORT           0x10 /* SP Support */
  37 #define U1_DISABLE_DEV                          0x01
  38 #define U1_TP_ABS_MODE                          0x02
  39 #define U1_SP_ABS_MODE                          0x80
  40
  41 #define ADDRESS_U1_DEV_CTRL_1   0x00800040
  42 #define ADDRESS_U1_DEVICE_TYP   0x00800043
  43 #define ADDRESS_U1_NUM_SENS_X   0x00800047
  44 #define ADDRESS_U1_NUM_SENS_Y   0x00800048
  45 #define ADDRESS_U1_PITCH_SENS_X 0x00800049
  46 #define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
  47 #define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
  48 #define ADDRESS_U1_PAD_BTN              0x00800052
  49 #define ADDRESS_U1_SP_BTN               0x0080009F
  50
  51 #define T4_INPUT_REPORT_LEN                     sizeof(struct t4_input_report)
  52 #define T4_FEATURE_REPORT_LEN           T4_INPUT_REPORT_LEN
  53 #define T4_FEATURE_REPORT_ID            7
  54 #define T4_CMD_REGISTER_READ                    0x08
  55 #define T4_CMD_REGISTER_WRITE                   0x07
  56
  57 #define T4_ADDRESS_BASE                         0xC2C0
  58 #define PRM_SYS_CONFIG_1                        (T4_ADDRESS_BASE + 0x0002)
  59 #define T4_PRM_FEED_CONFIG_1            (T4_ADDRESS_BASE + 0x0004)
  60 #define T4_PRM_FEED_CONFIG_4            (T4_ADDRESS_BASE + 0x001A)
  61 #define T4_PRM_ID_CONFIG_3                      (T4_ADDRESS_BASE + 0x00B0)
  62
  63
  64 #define T4_FEEDCFG4_ADVANCED_ABS_ENABLE                 0x01
  65 #define T4_I2C_ABS      0x78
  66
  67 #define T4_COUNT_PER_ELECTRODE          256
  68 #define MAX_TOUCHES     5
  69
  70 enum dev_num {
  71         U1,
  72         T4,
  73         UNKNOWN,
  74 };
  75 /**
  76  * struct u1_data
  77  *
  78  * @input: pointer to the kernel input device
  79  * @input2: pointer to the kernel input2 device
  80  * @hdev: pointer to the struct hid_device
  81  *
  82  * @dev_type: device type
  83  * @max_fingers: total number of fingers
  84  * @has_sp: boolean of sp existense
  85  * @sp_btn_info: button information
  86  * @x_active_len_mm: active area length of X (mm)
  87  * @y_active_len_mm: active area length of Y (mm)
  88  * @x_max: maximum x coordinate value
  89  * @y_max: maximum y coordinate value
  90  * @x_min: minimum x coordinate value
  91  * @y_min: minimum y coordinate value
  92  * @btn_cnt: number of buttons
  93  * @sp_btn_cnt: number of stick buttons
  94  */
  95 struct alps_dev {
  96         struct input_dev *input;
  97         struct input_dev *input2;
  98         struct hid_device *hdev;
  99
 100         enum dev_num dev_type;
 101         u8  max_fingers;
 102         u8  has_sp;
 103         u8      sp_btn_info;
 104         u32     x_active_len_mm;
 105         u32     y_active_len_mm;
 106         u32     x_max;
 107         u32     y_max;
 108         u32     x_min;
 109         u32     y_min;
 110         u32     btn_cnt;
 111         u32     sp_btn_cnt;
 112 };
 113
 114 struct t4_contact_data {
 115         u8  palm;
 116         u8      x_lo;
 117         u8      x_hi;
 118         u8      y_lo;
 119         u8      y_hi;
 120 };
 121
 122 struct t4_input_report {
 123         u8  reportID;
 124         u8  numContacts;
 125         struct t4_contact_data contact[5];
 126         u8  button;
 127         u8  track[5];
 128         u8  zx[5], zy[5];
 129         u8  palmTime[5];
 130         u8  kilroy;
 131         u16 timeStamp;
 132 };
 133
 134 static u16 t4_calc_check_sum(u8 *buffer,
 135                 unsigned long offset, unsigned long length)
 136 {
 137         u16 sum1 = 0xFF, sum2 = 0xFF;
 138         unsigned long i = 0;
 139
 140         if (offset + length >= 50)
 141                 return 0;
 142
 143         while (length > 0) {
 144                 u32 tlen = length > 20 ? 20 : length;
 145
 146                 length -= tlen;
 147
 148                 do {
 149                         sum1 += buffer[offset + i];
 150                         sum2 += sum1;
 151                         i++;
 152                 } while (--tlen > 0);
 153
 154                 sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 155                 sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 156         }
 157
 158         sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 159         sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 160
 161         return(sum2 << 8 | sum1);
 162 }
 163
 164 static int t4_read_write_register(struct hid_device *hdev, u32 address,
 165         u8 *read_val, u8 write_val, bool read_flag)
 166 {
 167         int ret;
 168         u16 check_sum;
 169         u8 *input;
 170         u8 *readbuf = NULL;
 171
 172         input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 173         if (!input)
 174                 return -ENOMEM;
 175
 176         input[0] = T4_FEATURE_REPORT_ID;
 177         if (read_flag) {
 178                 input[1] = T4_CMD_REGISTER_READ;
 179                 input[8] = 0x00;
 180         } else {
 181                 input[1] = T4_CMD_REGISTER_WRITE;
 182                 input[8] = write_val;
 183         }
 184         put_unaligned_le32(address, input + 2);
 185         input[6] = 1;
 186         input[7] = 0;
 187
 188         /* Calculate the checksum */
 189         check_sum = t4_calc_check_sum(input, 1, 8);
 190         input[9] = (u8)check_sum;
 191         input[10] = (u8)(check_sum >> 8);
 192         input[11] = 0;
 193
 194         ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input,
 195                         T4_FEATURE_REPORT_LEN,
 196                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 197
 198         if (ret < 0) {
 199                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 200                 goto exit;
 201         }
 202
 203         if (read_flag) {
 204                 readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 205                 if (!readbuf) {
 206                         ret = -ENOMEM;
 207                         goto exit;
 208                 }
 209
 210                 ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf,
 211                                 T4_FEATURE_REPORT_LEN,
 212                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 213                 if (ret < 0) {
 214                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 215                         goto exit_readbuf;
 216                 }
 217
 218                 ret = -EINVAL;
 219
 220                 if (*(u32 *)&readbuf[6] != address) {
 221                         dev_err(&hdev->dev, "read register address error (%x,%x)\n",
 222                                 *(u32 *)&readbuf[6], address);
 223                         goto exit_readbuf;
 224                 }
 225
 226                 if (*(u16 *)&readbuf[10] != 1) {
 227                         dev_err(&hdev->dev, "read register size error (%x)\n",
 228                                 *(u16 *)&readbuf[10]);
 229                         goto exit_readbuf;
 230                 }
 231
 232                 check_sum = t4_calc_check_sum(readbuf, 6, 7);
 233                 if (*(u16 *)&readbuf[13] != check_sum) {
 234                         dev_err(&hdev->dev, "read register checksum error (%x,%x)\n",
 235                                 *(u16 *)&readbuf[13], check_sum);
 236                         goto exit_readbuf;
 237                 }
 238
 239                 *read_val = readbuf[12];
 240         }
 241
 242         ret = 0;
 243
 244 exit_readbuf:
 245         kfree(readbuf);
 246 exit:
 247         kfree(input);
 248         return ret;
 249 }
 250
 251 static int u1_read_write_register(struct hid_device *hdev, u32 address,
 252         u8 *read_val, u8 write_val, bool read_flag)
 253 {
 254         int ret, i;
 255         u8 check_sum;
 256         u8 *input;
 257         u8 *readbuf;
 258
 259         input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 260         if (!input)
 261                 return -ENOMEM;
 262
 263         input[0] = U1_FEATURE_REPORT_ID;
 264         if (read_flag) {
 265                 input[1] = U1_CMD_REGISTER_READ;
 266                 input[6] = 0x00;
 267         } else {
 268                 input[1] = U1_CMD_REGISTER_WRITE;
 269                 input[6] = write_val;
 270         }
 271
 272         put_unaligned_le32(address, input + 2);
 273
 274         /* Calculate the checksum */
 275         check_sum = U1_FEATURE_REPORT_LEN_ALL;
 276         for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
 277                 check_sum += input[i];
 278
 279         input[7] = check_sum;
 280         ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
 281                         U1_FEATURE_REPORT_LEN,
 282                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 283
 284         if (ret < 0) {
 285                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 286                 goto exit;
 287         }
 288
 289         if (read_flag) {
 290                 readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 291                 if (!readbuf) {
 292                         ret = -ENOMEM;
 293                         goto exit;
 294                 }
 295
 296                 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
 297                                 U1_FEATURE_REPORT_LEN,
 298                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 299
 300                 if (ret < 0) {
 301                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 302                         kfree(readbuf);
 303                         goto exit;
 304                 }
 305
 306                 *read_val = readbuf[6];
 307
 308                 kfree(readbuf);
 309         }
 310
 311         ret = 0;
 312
 313 exit:
 314         kfree(input);
 315         return ret;
 316 }
 317
 318 static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size)
 319 {
 320         unsigned int x, y, z;
 321         int i;
 322         struct t4_input_report *p_report = (struct t4_input_report *)data;
 323
 324         if (!data)
 325                 return 0;
 326         for (i = 0; i < hdata->max_fingers; i++) {
 327                 x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo;
 328                 y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo;
 329                 y = hdata->y_max - y + hdata->y_min;
 330                 z = (p_report->contact[i].palm < 0x80 &&
 331                         p_report->contact[i].palm > 0) * 62;
 332                 if (x == 0xffff) {
 333                         x = 0;
 334                         y = 0;
 335                         z = 0;
 336                 }
 337                 input_mt_slot(hdata->input, i);
 338
 339                 input_mt_report_slot_state(hdata->input,
 340                         MT_TOOL_FINGER, z != 0);
 341
 342                 if (!z)
 343                         continue;
 344
 345                 input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
 346                 input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
 347                 input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
 348         }
 349         input_mt_sync_frame(hdata->input);
 350
 351         input_report_key(hdata->input, BTN_LEFT, p_report->button);
 352
 353         input_sync(hdata->input);
 354         return 1;
 355 }
 356
 357 static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size)
 358 {
 359         unsigned int x, y, z;
 360         int i;
 361         short sp_x, sp_y;
 362
 363         if (!data)
 364                 return 0;
 365         switch (data[0]) {
 366         case U1_MOUSE_REPORT_ID:
 367                 break;
 368         case U1_FEATURE_REPORT_ID:
 369                 break;
 370         case U1_ABSOLUTE_REPORT_ID:
 371                 for (i = 0; i < hdata->max_fingers; i++) {
 372                         u8 *contact = &data[i * 5];
 373
 374                         x = get_unaligned_le16(contact + 3);
 375                         y = get_unaligned_le16(contact + 5);
 376                         z = contact[7] & 0x7F;
 377
 378                         input_mt_slot(hdata->input, i);
 379
 380                         if (z != 0) {
 381                                 input_mt_report_slot_state(hdata->input,
 382                                         MT_TOOL_FINGER, 1);
 383                                 input_report_abs(hdata->input,
 384                                         ABS_MT_POSITION_X, x);
 385                                 input_report_abs(hdata->input,
 386                                         ABS_MT_POSITION_Y, y);
 387                                 input_report_abs(hdata->input,
 388                                         ABS_MT_PRESSURE, z);
 389                         } else {
 390                                 input_mt_report_slot_inactive(hdata->input);
 391                         }
 392                 }
 393
 394                 input_mt_sync_frame(hdata->input);
 395
 396                 input_report_key(hdata->input, BTN_LEFT,
 397                         data[1] & 0x1);
 398                 input_report_key(hdata->input, BTN_RIGHT,
 399                         (data[1] & 0x2));
 400                 input_report_key(hdata->input, BTN_MIDDLE,
 401                         (data[1] & 0x4));
 402
 403                 input_sync(hdata->input);
 404
 405                 return 1;
 406
 407         case U1_SP_ABSOLUTE_REPORT_ID:
 408                 sp_x = get_unaligned_le16(data+2);
 409                 sp_y = get_unaligned_le16(data+4);
 410
 411                 sp_x = sp_x / 8;
 412                 sp_y = sp_y / 8;
 413
 414                 input_report_rel(hdata->input2, REL_X, sp_x);
 415                 input_report_rel(hdata->input2, REL_Y, sp_y);
 416
 417                 input_report_key(hdata->input2, BTN_LEFT,
 418                         data[1] & 0x1);
 419                 input_report_key(hdata->input2, BTN_RIGHT,
 420                         (data[1] & 0x2));
 421                 input_report_key(hdata->input2, BTN_MIDDLE,
 422                         (data[1] & 0x4));
 423
 424                 input_sync(hdata->input2);
 425
 426                 return 1;
 427         }
 428
 429         return 0;
 430 }
 431
 432 static int alps_raw_event(struct hid_device *hdev,
 433                 struct hid_report *report, u8 *data, int size)
 434 {
 435         int ret = 0;
 436         struct alps_dev *hdata = hid_get_drvdata(hdev);
 437
 438         switch (hdev->product) {
 439         case HID_PRODUCT_ID_T4_BTNLESS:
 440                 ret = t4_raw_event(hdata, data, size);
 441                 break;
 442         default:
 443                 ret = u1_raw_event(hdata, data, size);
 444                 break;
 445         }
 446         return ret;
 447 }
 448
 449 static int __maybe_unused alps_post_reset(struct hid_device *hdev)
 450 {
 451         int ret = -1;
 452         struct alps_dev *data = hid_get_drvdata(hdev);
 453
 454         switch (data->dev_type) {
 455         case T4:
 456                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 457                         NULL, T4_I2C_ABS, false);
 458                 if (ret < 0) {
 459                         dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n",
 460                                 ret);
 461                         goto exit;
 462                 }
 463
 464                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
 465                         NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 466                 if (ret < 0) {
 467                         dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n",
 468                                 ret);
 469                         goto exit;
 470                 }
 471                 break;
 472         case U1:
 473                 ret = u1_read_write_register(hdev,
 474                         ADDRESS_U1_DEV_CTRL_1, NULL,
 475                         U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
 476                 if (ret < 0) {
 477                         dev_err(&hdev->dev, "failed to change TP mode (%d)\n",
 478                                 ret);
 479                         goto exit;
 480                 }
 481                 break;
 482         default:
 483                 break;
 484         }
 485
 486 exit:
 487         return ret;
 488 }
 489
 490 static int __maybe_unused alps_post_resume(struct hid_device *hdev)
 491 {
 492         return alps_post_reset(hdev);
 493 }
 494
 495 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
 496 {
 497         int ret;
 498         u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
 499         u8 pitch_x, pitch_y, resolution;
 500
 501         /* Device initialization */
 502         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 503                         &dev_ctrl, 0, true);
 504         if (ret < 0) {
 505                 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
 506                 goto exit;
 507         }
 508
 509         dev_ctrl &= ~U1_DISABLE_DEV;
 510         dev_ctrl |= U1_TP_ABS_MODE;
 511         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 512                         NULL, dev_ctrl, false);
 513         if (ret < 0) {
 514                 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
 515                 goto exit;
 516         }
 517
 518         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
 519                         &sen_line_num_x, 0, true);
 520         if (ret < 0) {
 521                 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
 522                 goto exit;
 523         }
 524
 525         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
 526                         &sen_line_num_y, 0, true);
 527                 if (ret < 0) {
 528                 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
 529                 goto exit;
 530         }
 531
 532         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
 533                         &pitch_x, 0, true);
 534         if (ret < 0) {
 535                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
 536                 goto exit;
 537         }
 538
 539         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
 540                         &pitch_y, 0, true);
 541         if (ret < 0) {
 542                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
 543                 goto exit;
 544         }
 545
 546         ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
 547                 &resolution, 0, true);
 548         if (ret < 0) {
 549                 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
 550                 goto exit;
 551         }
 552         pri_data->x_active_len_mm =
 553                 (pitch_x * (sen_line_num_x - 1)) / 10;
 554         pri_data->y_active_len_mm =
 555                 (pitch_y * (sen_line_num_y - 1)) / 10;
 556
 557         pri_data->x_max =
 558                 (resolution << 2) * (sen_line_num_x - 1);
 559         pri_data->x_min = 1;
 560         pri_data->y_max =
 561                 (resolution << 2) * (sen_line_num_y - 1);
 562         pri_data->y_min = 1;
 563
 564         ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
 565                         &tmp, 0, true);
 566         if (ret < 0) {
 567                 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
 568                 goto exit;
 569         }
 570         if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
 571                 pri_data->btn_cnt = (tmp & 0x0F);
 572         } else {
 573                 /* Button pad */
 574                 pri_data->btn_cnt = 1;
 575         }
 576
 577         pri_data->has_sp = 0;
 578         /* Check StickPointer device */
 579         ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
 580                         &tmp, 0, true);
 581         if (ret < 0) {
 582                 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
 583                 goto exit;
 584         }
 585         if (tmp & U1_DEVTYPE_SP_SUPPORT) {
 586                 dev_ctrl |= U1_SP_ABS_MODE;
 587                 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 588                         NULL, dev_ctrl, false);
 589                 if (ret < 0) {
 590                         dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
 591                         goto exit;
 592                 }
 593
 594                 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
 595                         &pri_data->sp_btn_info, 0, true);
 596                 if (ret < 0) {
 597                         dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
 598                         goto exit;
 599                 }
 600                 pri_data->has_sp = 1;
 601         }
 602         pri_data->max_fingers = 5;
 603 exit:
 604         return ret;
 605 }
 606
 607 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
 608 {
 609         int ret;
 610         u8 tmp, sen_line_num_x, sen_line_num_y;
 611
 612         ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
 613         if (ret < 0) {
 614                 dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
 615                 goto exit;
 616         }
 617         sen_line_num_x = 16 + ((tmp & 0x0F)  | (tmp & 0x08 ? 0xF0 : 0));
 618         sen_line_num_y = 12 + (((tmp & 0xF0) >> 4)  | (tmp & 0x80 ? 0xF0 : 0));
 619
 620         pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
 621         pri_data->x_min = T4_COUNT_PER_ELECTRODE;
 622         pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
 623         pri_data->y_min = T4_COUNT_PER_ELECTRODE;
 624         pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0;
 625         pri_data->btn_cnt = 1;
 626
 627         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
 628         if (ret < 0) {
 629                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 630                 goto exit;
 631         }
 632         tmp |= 0x02;
 633         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
 634         if (ret < 0) {
 635                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 636                 goto exit;
 637         }
 638
 639         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 640                                         NULL, T4_I2C_ABS, false);
 641         if (ret < 0) {
 642                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
 643                 goto exit;
 644         }
 645
 646         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL,
 647                                 T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 648         if (ret < 0) {
 649                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
 650                 goto exit;
 651         }
 652         pri_data->max_fingers = 5;
 653         pri_data->has_sp = 0;
 654 exit:
 655         return ret;
 656 }
 657
 658 static int alps_sp_open(struct input_dev *dev)
 659 {
 660         struct hid_device *hid = input_get_drvdata(dev);
 661
 662         return hid_hw_open(hid);
 663 }
 664
 665 static void alps_sp_close(struct input_dev *dev)
 666 {
 667         struct hid_device *hid = input_get_drvdata(dev);
 668
 669         hid_hw_close(hid);
 670 }
 671
 672 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
 673 {
 674         struct alps_dev *data = hid_get_drvdata(hdev);
 675         struct input_dev *input = hi->input, *input2;
 676         int ret;
 677         int res_x, res_y, i;
 678
 679         data->input = input;
 680
 681         hid_dbg(hdev, "Opening low level driver\n");
 682         ret = hid_hw_open(hdev);
 683         if (ret)
 684                 return ret;
 685
 686         /* Allow incoming hid reports */
 687         hid_device_io_start(hdev);
 688         switch (data->dev_type) {
 689         case T4:
 690                 ret = T4_init(hdev, data);
 691                 break;
 692         case U1:
 693                 ret = u1_init(hdev, data);
 694                 break;
 695         default:
 696                 break;
 697         }
 698
 699         if (ret)
 700                 goto exit;
 701
 702         __set_bit(EV_ABS, input->evbit);
 703         input_set_abs_params(input, ABS_MT_POSITION_X,
 704                                                 data->x_min, data->x_max, 0, 0);
 705         input_set_abs_params(input, ABS_MT_POSITION_Y,
 706                                                 data->y_min, data->y_max, 0, 0);
 707
 708         if (data->x_active_len_mm && data->y_active_len_mm) {
 709                 res_x = (data->x_max - 1) / data->x_active_len_mm;
 710                 res_y = (data->y_max - 1) / data->y_active_len_mm;
 711
 712                 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
 713                 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
 714         }
 715
 716         input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
 717
 718         input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
 719
 720         __set_bit(EV_KEY, input->evbit);
 721
 722         if (data->btn_cnt == 1)
 723                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 724
 725         for (i = 0; i < data->btn_cnt; i++)
 726                 __set_bit(BTN_LEFT + i, input->keybit);
 727
 728         /* Stick device initialization */
 729         if (data->has_sp) {
 730                 input2 = input_allocate_device();
 731                 if (!input2) {
 732                         ret = -ENOMEM;
 733                         goto exit;
 734                 }
 735
 736                 data->input2 = input2;
 737                 input2->phys = input->phys;
 738                 input2->name = "DualPoint Stick";
 739                 input2->id.bustype = BUS_I2C;
 740                 input2->id.vendor  = input->id.vendor;
 741                 input2->id.product = input->id.product;
 742                 input2->id.version = input->id.version;
 743                 input2->dev.parent = input->dev.parent;
 744
 745                 input_set_drvdata(input2, hdev);
 746                 input2->open = alps_sp_open;
 747                 input2->close = alps_sp_close;
 748
 749                 __set_bit(EV_KEY, input2->evbit);
 750                 data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
 751                 for (i = 0; i < data->sp_btn_cnt; i++)
 752                         __set_bit(BTN_LEFT + i, input2->keybit);
 753
 754                 __set_bit(EV_REL, input2->evbit);
 755                 __set_bit(REL_X, input2->relbit);
 756                 __set_bit(REL_Y, input2->relbit);
 757                 __set_bit(INPUT_PROP_POINTER, input2->propbit);
 758                 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
 759
 760                 if (input_register_device(data->input2)) {
 761                         input_free_device(input2);
 762                         goto exit;
 763                 }
 764         }
 765
 766 exit:
 767         hid_device_io_stop(hdev);
 768         hid_hw_close(hdev);
 769         return ret;
 770 }
 771
 772 static int alps_input_mapping(struct hid_device *hdev,
 773                 struct hid_input *hi, struct hid_field *field,
 774                 struct hid_usage *usage, unsigned long **bit, int *max)
 775 {
 776         return -1;
 777 }
 778
 779 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
 780 {
 781         struct alps_dev *data = NULL;
 782         int ret;
 783         data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
 784         if (!data)
 785                 return -ENOMEM;
 786
 787         data->hdev = hdev;
 788         hid_set_drvdata(hdev, data);
 789
 790         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 791
 792         ret = hid_parse(hdev);
 793         if (ret) {
 794                 hid_err(hdev, "parse failed\n");
 795                 return ret;
 796         }
 797
 798         switch (hdev->product) {
 799         case HID_DEVICE_ID_ALPS_T4_BTNLESS:
 800                 data->dev_type = T4;
 801                 break;
 802         case HID_DEVICE_ID_ALPS_U1_DUAL:
 803         case HID_DEVICE_ID_ALPS_U1:
 804         case HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY:
 805                 data->dev_type = U1;
 806                 break;
 807         default:
 808                 data->dev_type = UNKNOWN;
 809         }
 810
 811         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 812         if (ret) {
 813                 hid_err(hdev, "hw start failed\n");
 814                 return ret;
 815         }
 816
 817         return 0;
 818 }
 819
 820 static void alps_remove(struct hid_device *hdev)
 821 {
 822         hid_hw_stop(hdev);
 823 }
 824
 825 static const struct hid_device_id alps_id[] = {
 826         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 827                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
 828         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 829                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
 830         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 831                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
 832         { }
 833 };
 834 MODULE_DEVICE_TABLE(hid, alps_id);
 835
 836 static struct hid_driver alps_driver = {
 837         .name = "hid-alps",
 838         .id_table               = alps_id,
 839         .probe                  = alps_probe,
 840         .remove                 = alps_remove,
 841         .raw_event              = alps_raw_event,
 842         .input_mapping          = alps_input_mapping,
 843         .input_configured       = alps_input_configured,
 844 #ifdef CONFIG_PM
 845         .resume                 = alps_post_resume,
 846         .reset_resume           = alps_post_reset,
 847 #endif
 848 };
 849
 850 module_hid_driver(alps_driver);
 851
 852 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
 853 MODULE_DESCRIPTION("ALPS HID driver");
 854 MODULE_LICENSE("GPL");