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_ABSOLUTE_REPORT_ID_SECD  0x02 /* FW-PTP Absolute data ReportID */
  29 #define U1_FEATURE_REPORT_ID            0x05 /* Feature ReportID */
  30 #define U1_SP_ABSOLUTE_REPORT_ID        0x06 /* Feature ReportID */
  31
  32 #define U1_FEATURE_REPORT_LEN           0x08 /* Feature Report Length */
  33 #define U1_FEATURE_REPORT_LEN_ALL       0x0A
  34 #define U1_CMD_REGISTER_READ            0xD1
  35 #define U1_CMD_REGISTER_WRITE           0xD2
  36
  37 #define U1_DEVTYPE_SP_SUPPORT           0x10 /* SP Support */
  38 #define U1_DISABLE_DEV                          0x01
  39 #define U1_TP_ABS_MODE                          0x02
  40 #define U1_SP_ABS_MODE                          0x80
  41
  42 #define ADDRESS_U1_DEV_CTRL_1   0x00800040
  43 #define ADDRESS_U1_DEVICE_TYP   0x00800043
  44 #define ADDRESS_U1_NUM_SENS_X   0x00800047
  45 #define ADDRESS_U1_NUM_SENS_Y   0x00800048
  46 #define ADDRESS_U1_PITCH_SENS_X 0x00800049
  47 #define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
  48 #define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
  49 #define ADDRESS_U1_PAD_BTN              0x00800052
  50 #define ADDRESS_U1_SP_BTN               0x0080009F
  51
  52 #define T4_INPUT_REPORT_LEN                     sizeof(struct t4_input_report)
  53 #define T4_FEATURE_REPORT_LEN           T4_INPUT_REPORT_LEN
  54 #define T4_FEATURE_REPORT_ID            7
  55 #define T4_CMD_REGISTER_READ                    0x08
  56 #define T4_CMD_REGISTER_WRITE                   0x07
  57
  58 #define T4_ADDRESS_BASE                         0xC2C0
  59 #define PRM_SYS_CONFIG_1                        (T4_ADDRESS_BASE + 0x0002)
  60 #define T4_PRM_FEED_CONFIG_1            (T4_ADDRESS_BASE + 0x0004)
  61 #define T4_PRM_FEED_CONFIG_4            (T4_ADDRESS_BASE + 0x001A)
  62 #define T4_PRM_ID_CONFIG_3                      (T4_ADDRESS_BASE + 0x00B0)
  63
  64
  65 #define T4_FEEDCFG4_ADVANCED_ABS_ENABLE                 0x01
  66 #define T4_I2C_ABS      0x78
  67
  68 #define T4_COUNT_PER_ELECTRODE          256
  69 #define MAX_TOUCHES     5
  70
  71 enum dev_num {
  72         U1,
  73         T4,
  74         UNKNOWN,
  75 };
  76 /**
  77  * struct u1_data
  78  *
  79  * @input: pointer to the kernel input device
  80  * @input2: pointer to the kernel input2 device
  81  * @hdev: pointer to the struct hid_device
  82  *
  83  * @dev_type: device type
  84  * @max_fingers: total number of fingers
  85  * @has_sp: boolean of sp existense
  86  * @sp_btn_info: button information
  87  * @x_active_len_mm: active area length of X (mm)
  88  * @y_active_len_mm: active area length of Y (mm)
  89  * @x_max: maximum x coordinate value
  90  * @y_max: maximum y coordinate value
  91  * @x_min: minimum x coordinate value
  92  * @y_min: minimum y coordinate value
  93  * @btn_cnt: number of buttons
  94  * @sp_btn_cnt: number of stick buttons
  95  */
  96 struct alps_dev {
  97         struct input_dev *input;
  98         struct input_dev *input2;
  99         struct hid_device *hdev;
 100
 101         enum dev_num dev_type;
 102         u8  max_fingers;
 103         u8  has_sp;
 104         u8      sp_btn_info;
 105         u32     x_active_len_mm;
 106         u32     y_active_len_mm;
 107         u32     x_max;
 108         u32     y_max;
 109         u32     x_min;
 110         u32     y_min;
 111         u32     btn_cnt;
 112         u32     sp_btn_cnt;
 113 };
 114
 115 struct t4_contact_data {
 116         u8  palm;
 117         u8      x_lo;
 118         u8      x_hi;
 119         u8      y_lo;
 120         u8      y_hi;
 121 };
 122
 123 struct t4_input_report {
 124         u8  reportID;
 125         u8  numContacts;
 126         struct t4_contact_data contact[5];
 127         u8  button;
 128         u8  track[5];
 129         u8  zx[5], zy[5];
 130         u8  palmTime[5];
 131         u8  kilroy;
 132         u16 timeStamp;
 133 };
 134
 135 static u16 t4_calc_check_sum(u8 *buffer,
 136                 unsigned long offset, unsigned long length)
 137 {
 138         u16 sum1 = 0xFF, sum2 = 0xFF;
 139         unsigned long i = 0;
 140
 141         if (offset + length >= 50)
 142                 return 0;
 143
 144         while (length > 0) {
 145                 u32 tlen = length > 20 ? 20 : length;
 146
 147                 length -= tlen;
 148
 149                 do {
 150                         sum1 += buffer[offset + i];
 151                         sum2 += sum1;
 152                         i++;
 153                 } while (--tlen > 0);
 154
 155                 sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 156                 sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 157         }
 158
 159         sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 160         sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 161
 162         return(sum2 << 8 | sum1);
 163 }
 164
 165 static int t4_read_write_register(struct hid_device *hdev, u32 address,
 166         u8 *read_val, u8 write_val, bool read_flag)
 167 {
 168         int ret;
 169         u16 check_sum;
 170         u8 *input;
 171         u8 *readbuf = NULL;
 172
 173         input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 174         if (!input)
 175                 return -ENOMEM;
 176
 177         input[0] = T4_FEATURE_REPORT_ID;
 178         if (read_flag) {
 179                 input[1] = T4_CMD_REGISTER_READ;
 180                 input[8] = 0x00;
 181         } else {
 182                 input[1] = T4_CMD_REGISTER_WRITE;
 183                 input[8] = write_val;
 184         }
 185         put_unaligned_le32(address, input + 2);
 186         input[6] = 1;
 187         input[7] = 0;
 188
 189         /* Calculate the checksum */
 190         check_sum = t4_calc_check_sum(input, 1, 8);
 191         input[9] = (u8)check_sum;
 192         input[10] = (u8)(check_sum >> 8);
 193         input[11] = 0;
 194
 195         ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input,
 196                         T4_FEATURE_REPORT_LEN,
 197                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 198
 199         if (ret < 0) {
 200                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 201                 goto exit;
 202         }
 203
 204         if (read_flag) {
 205                 readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 206                 if (!readbuf) {
 207                         ret = -ENOMEM;
 208                         goto exit;
 209                 }
 210
 211                 ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf,
 212                                 T4_FEATURE_REPORT_LEN,
 213                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 214                 if (ret < 0) {
 215                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 216                         goto exit_readbuf;
 217                 }
 218
 219                 ret = -EINVAL;
 220
 221                 if (*(u32 *)&readbuf[6] != address) {
 222                         dev_err(&hdev->dev, "read register address error (%x,%x)\n",
 223                                 *(u32 *)&readbuf[6], address);
 224                         goto exit_readbuf;
 225                 }
 226
 227                 if (*(u16 *)&readbuf[10] != 1) {
 228                         dev_err(&hdev->dev, "read register size error (%x)\n",
 229                                 *(u16 *)&readbuf[10]);
 230                         goto exit_readbuf;
 231                 }
 232
 233                 check_sum = t4_calc_check_sum(readbuf, 6, 7);
 234                 if (*(u16 *)&readbuf[13] != check_sum) {
 235                         dev_err(&hdev->dev, "read register checksum error (%x,%x)\n",
 236                                 *(u16 *)&readbuf[13], check_sum);
 237                         goto exit_readbuf;
 238                 }
 239
 240                 *read_val = readbuf[12];
 241         }
 242
 243         ret = 0;
 244
 245 exit_readbuf:
 246         kfree(readbuf);
 247 exit:
 248         kfree(input);
 249         return ret;
 250 }
 251
 252 static int u1_read_write_register(struct hid_device *hdev, u32 address,
 253         u8 *read_val, u8 write_val, bool read_flag)
 254 {
 255         int ret, i;
 256         u8 check_sum;
 257         u8 *input;
 258         u8 *readbuf;
 259
 260         input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 261         if (!input)
 262                 return -ENOMEM;
 263
 264         input[0] = U1_FEATURE_REPORT_ID;
 265         if (read_flag) {
 266                 input[1] = U1_CMD_REGISTER_READ;
 267                 input[6] = 0x00;
 268         } else {
 269                 input[1] = U1_CMD_REGISTER_WRITE;
 270                 input[6] = write_val;
 271         }
 272
 273         put_unaligned_le32(address, input + 2);
 274
 275         /* Calculate the checksum */
 276         check_sum = U1_FEATURE_REPORT_LEN_ALL;
 277         for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
 278                 check_sum += input[i];
 279
 280         input[7] = check_sum;
 281         ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
 282                         U1_FEATURE_REPORT_LEN,
 283                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 284
 285         if (ret < 0) {
 286                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 287                 goto exit;
 288         }
 289
 290         if (read_flag) {
 291                 readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 292                 if (!readbuf) {
 293                         ret = -ENOMEM;
 294                         goto exit;
 295                 }
 296
 297                 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
 298                                 U1_FEATURE_REPORT_LEN,
 299                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 300
 301                 if (ret < 0) {
 302                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 303                         kfree(readbuf);
 304                         goto exit;
 305                 }
 306
 307                 *read_val = readbuf[6];
 308
 309                 kfree(readbuf);
 310         }
 311
 312         ret = 0;
 313
 314 exit:
 315         kfree(input);
 316         return ret;
 317 }
 318
 319 static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size)
 320 {
 321         unsigned int x, y, z;
 322         int i;
 323         struct t4_input_report *p_report = (struct t4_input_report *)data;
 324
 325         if (!data)
 326                 return 0;
 327         for (i = 0; i < hdata->max_fingers; i++) {
 328                 x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo;
 329                 y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo;
 330                 y = hdata->y_max - y + hdata->y_min;
 331                 z = (p_report->contact[i].palm < 0x80 &&
 332                         p_report->contact[i].palm > 0) * 62;
 333                 if (x == 0xffff) {
 334                         x = 0;
 335                         y = 0;
 336                         z = 0;
 337                 }
 338                 input_mt_slot(hdata->input, i);
 339
 340                 input_mt_report_slot_state(hdata->input,
 341                         MT_TOOL_FINGER, z != 0);
 342
 343                 if (!z)
 344                         continue;
 345
 346                 input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
 347                 input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
 348                 input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
 349         }
 350         input_mt_sync_frame(hdata->input);
 351
 352         input_report_key(hdata->input, BTN_LEFT, p_report->button);
 353
 354         input_sync(hdata->input);
 355         return 1;
 356 }
 357
 358 static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size)
 359 {
 360         unsigned int x, y, z;
 361         int i;
 362         short sp_x, sp_y;
 363
 364         if (!data)
 365                 return 0;
 366         switch (data[0]) {
 367         case U1_MOUSE_REPORT_ID:
 368                 break;
 369         case U1_FEATURE_REPORT_ID:
 370                 break;
 371         case U1_ABSOLUTE_REPORT_ID:
 372         case U1_ABSOLUTE_REPORT_ID_SECD:
 373                 for (i = 0; i < hdata->max_fingers; i++) {
 374                         u8 *contact = &data[i * 5];
 375
 376                         x = get_unaligned_le16(contact + 3);
 377                         y = get_unaligned_le16(contact + 5);
 378                         z = contact[7] & 0x7F;
 379
 380                         input_mt_slot(hdata->input, i);
 381
 382                         if (z != 0) {
 383                                 input_mt_report_slot_state(hdata->input,
 384                                         MT_TOOL_FINGER, 1);
 385                                 input_report_abs(hdata->input,
 386                                         ABS_MT_POSITION_X, x);
 387                                 input_report_abs(hdata->input,
 388                                         ABS_MT_POSITION_Y, y);
 389                                 input_report_abs(hdata->input,
 390                                         ABS_MT_PRESSURE, z);
 391                         } else {
 392                                 input_mt_report_slot_inactive(hdata->input);
 393                         }
 394                 }
 395
 396                 input_mt_sync_frame(hdata->input);
 397
 398                 input_report_key(hdata->input, BTN_LEFT,
 399                         data[1] & 0x1);
 400                 input_report_key(hdata->input, BTN_RIGHT,
 401                         (data[1] & 0x2));
 402                 input_report_key(hdata->input, BTN_MIDDLE,
 403                         (data[1] & 0x4));
 404
 405                 input_sync(hdata->input);
 406
 407                 return 1;
 408
 409         case U1_SP_ABSOLUTE_REPORT_ID:
 410                 sp_x = get_unaligned_le16(data+2);
 411                 sp_y = get_unaligned_le16(data+4);
 412
 413                 sp_x = sp_x / 8;
 414                 sp_y = sp_y / 8;
 415
 416                 input_report_rel(hdata->input2, REL_X, sp_x);
 417                 input_report_rel(hdata->input2, REL_Y, sp_y);
 418
 419                 input_report_key(hdata->input2, BTN_LEFT,
 420                         data[1] & 0x1);
 421                 input_report_key(hdata->input2, BTN_RIGHT,
 422                         (data[1] & 0x2));
 423                 input_report_key(hdata->input2, BTN_MIDDLE,
 424                         (data[1] & 0x4));
 425
 426                 input_sync(hdata->input2);
 427
 428                 return 1;
 429         }
 430
 431         return 0;
 432 }
 433
 434 static int alps_raw_event(struct hid_device *hdev,
 435                 struct hid_report *report, u8 *data, int size)
 436 {
 437         int ret = 0;
 438         struct alps_dev *hdata = hid_get_drvdata(hdev);
 439
 440         switch (hdev->product) {
 441         case HID_PRODUCT_ID_T4_BTNLESS:
 442                 ret = t4_raw_event(hdata, data, size);
 443                 break;
 444         default:
 445                 ret = u1_raw_event(hdata, data, size);
 446                 break;
 447         }
 448         return ret;
 449 }
 450
 451 static int __maybe_unused alps_post_reset(struct hid_device *hdev)
 452 {
 453         int ret = -1;
 454         struct alps_dev *data = hid_get_drvdata(hdev);
 455
 456         switch (data->dev_type) {
 457         case T4:
 458                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 459                         NULL, T4_I2C_ABS, false);
 460                 if (ret < 0) {
 461                         dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n",
 462                                 ret);
 463                         goto exit;
 464                 }
 465
 466                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
 467                         NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 468                 if (ret < 0) {
 469                         dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n",
 470                                 ret);
 471                         goto exit;
 472                 }
 473                 break;
 474         case U1:
 475                 ret = u1_read_write_register(hdev,
 476                         ADDRESS_U1_DEV_CTRL_1, NULL,
 477                         U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
 478                 if (ret < 0) {
 479                         dev_err(&hdev->dev, "failed to change TP mode (%d)\n",
 480                                 ret);
 481                         goto exit;
 482                 }
 483                 break;
 484         default:
 485                 break;
 486         }
 487
 488 exit:
 489         return ret;
 490 }
 491
 492 static int __maybe_unused alps_post_resume(struct hid_device *hdev)
 493 {
 494         return alps_post_reset(hdev);
 495 }
 496
 497 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
 498 {
 499         int ret;
 500         u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
 501         u8 pitch_x, pitch_y, resolution;
 502
 503         /* Device initialization */
 504         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 505                         &dev_ctrl, 0, true);
 506         if (ret < 0) {
 507                 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
 508                 goto exit;
 509         }
 510
 511         dev_ctrl &= ~U1_DISABLE_DEV;
 512         dev_ctrl |= U1_TP_ABS_MODE;
 513         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 514                         NULL, dev_ctrl, false);
 515         if (ret < 0) {
 516                 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
 517                 goto exit;
 518         }
 519
 520         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
 521                         &sen_line_num_x, 0, true);
 522         if (ret < 0) {
 523                 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
 524                 goto exit;
 525         }
 526
 527         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
 528                         &sen_line_num_y, 0, true);
 529                 if (ret < 0) {
 530                 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
 531                 goto exit;
 532         }
 533
 534         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
 535                         &pitch_x, 0, true);
 536         if (ret < 0) {
 537                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
 538                 goto exit;
 539         }
 540
 541         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
 542                         &pitch_y, 0, true);
 543         if (ret < 0) {
 544                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
 545                 goto exit;
 546         }
 547
 548         ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
 549                 &resolution, 0, true);
 550         if (ret < 0) {
 551                 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
 552                 goto exit;
 553         }
 554         pri_data->x_active_len_mm =
 555                 (pitch_x * (sen_line_num_x - 1)) / 10;
 556         pri_data->y_active_len_mm =
 557                 (pitch_y * (sen_line_num_y - 1)) / 10;
 558
 559         pri_data->x_max =
 560                 (resolution << 2) * (sen_line_num_x - 1);
 561         pri_data->x_min = 1;
 562         pri_data->y_max =
 563                 (resolution << 2) * (sen_line_num_y - 1);
 564         pri_data->y_min = 1;
 565
 566         ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
 567                         &tmp, 0, true);
 568         if (ret < 0) {
 569                 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
 570                 goto exit;
 571         }
 572         if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
 573                 pri_data->btn_cnt = (tmp & 0x0F);
 574         } else {
 575                 /* Button pad */
 576                 pri_data->btn_cnt = 1;
 577         }
 578
 579         pri_data->has_sp = 0;
 580         /* Check StickPointer device */
 581         ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
 582                         &tmp, 0, true);
 583         if (ret < 0) {
 584                 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
 585                 goto exit;
 586         }
 587         if (tmp & U1_DEVTYPE_SP_SUPPORT) {
 588                 dev_ctrl |= U1_SP_ABS_MODE;
 589                 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 590                         NULL, dev_ctrl, false);
 591                 if (ret < 0) {
 592                         dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
 593                         goto exit;
 594                 }
 595
 596                 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
 597                         &pri_data->sp_btn_info, 0, true);
 598                 if (ret < 0) {
 599                         dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
 600                         goto exit;
 601                 }
 602                 pri_data->has_sp = 1;
 603         }
 604         pri_data->max_fingers = 5;
 605 exit:
 606         return ret;
 607 }
 608
 609 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
 610 {
 611         int ret;
 612         u8 tmp, sen_line_num_x, sen_line_num_y;
 613
 614         ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
 615         if (ret < 0) {
 616                 dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
 617                 goto exit;
 618         }
 619         sen_line_num_x = 16 + ((tmp & 0x0F)  | (tmp & 0x08 ? 0xF0 : 0));
 620         sen_line_num_y = 12 + (((tmp & 0xF0) >> 4)  | (tmp & 0x80 ? 0xF0 : 0));
 621
 622         pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
 623         pri_data->x_min = T4_COUNT_PER_ELECTRODE;
 624         pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
 625         pri_data->y_min = T4_COUNT_PER_ELECTRODE;
 626         pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0;
 627         pri_data->btn_cnt = 1;
 628
 629         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
 630         if (ret < 0) {
 631                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 632                 goto exit;
 633         }
 634         tmp |= 0x02;
 635         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
 636         if (ret < 0) {
 637                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 638                 goto exit;
 639         }
 640
 641         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 642                                         NULL, T4_I2C_ABS, false);
 643         if (ret < 0) {
 644                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
 645                 goto exit;
 646         }
 647
 648         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL,
 649                                 T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 650         if (ret < 0) {
 651                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
 652                 goto exit;
 653         }
 654         pri_data->max_fingers = 5;
 655         pri_data->has_sp = 0;
 656 exit:
 657         return ret;
 658 }
 659
 660 static int alps_sp_open(struct input_dev *dev)
 661 {
 662         struct hid_device *hid = input_get_drvdata(dev);
 663
 664         return hid_hw_open(hid);
 665 }
 666
 667 static void alps_sp_close(struct input_dev *dev)
 668 {
 669         struct hid_device *hid = input_get_drvdata(dev);
 670
 671         hid_hw_close(hid);
 672 }
 673
 674 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
 675 {
 676         struct alps_dev *data = hid_get_drvdata(hdev);
 677         struct input_dev *input = hi->input, *input2;
 678         int ret;
 679         int res_x, res_y, i;
 680
 681         data->input = input;
 682
 683         hid_dbg(hdev, "Opening low level driver\n");
 684         ret = hid_hw_open(hdev);
 685         if (ret)
 686                 return ret;
 687
 688         /* Allow incoming hid reports */
 689         hid_device_io_start(hdev);
 690         switch (data->dev_type) {
 691         case T4:
 692                 ret = T4_init(hdev, data);
 693                 break;
 694         case U1:
 695                 ret = u1_init(hdev, data);
 696                 break;
 697         default:
 698                 break;
 699         }
 700
 701         if (ret)
 702                 goto exit;
 703
 704         __set_bit(EV_ABS, input->evbit);
 705         input_set_abs_params(input, ABS_MT_POSITION_X,
 706                                                 data->x_min, data->x_max, 0, 0);
 707         input_set_abs_params(input, ABS_MT_POSITION_Y,
 708                                                 data->y_min, data->y_max, 0, 0);
 709
 710         if (data->x_active_len_mm && data->y_active_len_mm) {
 711                 res_x = (data->x_max - 1) / data->x_active_len_mm;
 712                 res_y = (data->y_max - 1) / data->y_active_len_mm;
 713
 714                 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
 715                 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
 716         }
 717
 718         input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
 719
 720         input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
 721
 722         __set_bit(EV_KEY, input->evbit);
 723
 724         if (data->btn_cnt == 1)
 725                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 726
 727         for (i = 0; i < data->btn_cnt; i++)
 728                 __set_bit(BTN_LEFT + i, input->keybit);
 729
 730         /* Stick device initialization */
 731         if (data->has_sp) {
 732                 input2 = input_allocate_device();
 733                 if (!input2) {
 734                         ret = -ENOMEM;
 735                         goto exit;
 736                 }
 737
 738                 data->input2 = input2;
 739                 input2->phys = input->phys;
 740                 input2->name = "DualPoint Stick";
 741                 input2->id.bustype = BUS_I2C;
 742                 input2->id.vendor  = input->id.vendor;
 743                 input2->id.product = input->id.product;
 744                 input2->id.version = input->id.version;
 745                 input2->dev.parent = input->dev.parent;
 746
 747                 input_set_drvdata(input2, hdev);
 748                 input2->open = alps_sp_open;
 749                 input2->close = alps_sp_close;
 750
 751                 __set_bit(EV_KEY, input2->evbit);
 752                 data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
 753                 for (i = 0; i < data->sp_btn_cnt; i++)
 754                         __set_bit(BTN_LEFT + i, input2->keybit);
 755
 756                 __set_bit(EV_REL, input2->evbit);
 757                 __set_bit(REL_X, input2->relbit);
 758                 __set_bit(REL_Y, input2->relbit);
 759                 __set_bit(INPUT_PROP_POINTER, input2->propbit);
 760                 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
 761
 762                 if (input_register_device(data->input2)) {
 763                         input_free_device(input2);
 764                         goto exit;
 765                 }
 766         }
 767
 768 exit:
 769         hid_device_io_stop(hdev);
 770         hid_hw_close(hdev);
 771         return ret;
 772 }
 773
 774 static int alps_input_mapping(struct hid_device *hdev,
 775                 struct hid_input *hi, struct hid_field *field,
 776                 struct hid_usage *usage, unsigned long **bit, int *max)
 777 {
 778         return -1;
 779 }
 780
 781 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
 782 {
 783         struct alps_dev *data = NULL;
 784         int ret;
 785         data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
 786         if (!data)
 787                 return -ENOMEM;
 788
 789         data->hdev = hdev;
 790         hid_set_drvdata(hdev, data);
 791
 792         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 793
 794         ret = hid_parse(hdev);
 795         if (ret) {
 796                 hid_err(hdev, "parse failed\n");
 797                 return ret;
 798         }
 799
 800         switch (hdev->product) {
 801         case HID_DEVICE_ID_ALPS_T4_BTNLESS:
 802                 data->dev_type = T4;
 803                 break;
 804         case HID_DEVICE_ID_ALPS_U1_DUAL:
 805         case HID_DEVICE_ID_ALPS_U1:
 806         case HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY:
 807                 data->dev_type = U1;
 808                 break;
 809         default:
 810                 data->dev_type = UNKNOWN;
 811         }
 812
 813         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 814         if (ret) {
 815                 hid_err(hdev, "hw start failed\n");
 816                 return ret;
 817         }
 818
 819         return 0;
 820 }
 821
 822 static void alps_remove(struct hid_device *hdev)
 823 {
 824         hid_hw_stop(hdev);
 825 }
 826
 827 static const struct hid_device_id alps_id[] = {
 828         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 829                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
 830         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 831                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
 832         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 833                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
 834         { }
 835 };
 836 MODULE_DEVICE_TABLE(hid, alps_id);
 837
 838 static struct hid_driver alps_driver = {
 839         .name = "hid-alps",
 840         .id_table               = alps_id,
 841         .probe                  = alps_probe,
 842         .remove                 = alps_remove,
 843         .raw_event              = alps_raw_event,
 844         .input_mapping          = alps_input_mapping,
 845         .input_configured       = alps_input_configured,
 846 #ifdef CONFIG_PM
 847         .resume                 = alps_post_resume,
 848         .reset_resume           = alps_post_reset,
 849 #endif
 850 };
 851
 852 module_hid_driver(alps_driver);
 853
 854 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
 855 MODULE_DESCRIPTION("ALPS HID driver");
 856 MODULE_LICENSE("GPL");