drivers/hid/hid-alps.c

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