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;
 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         readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 208         if (read_flag) {
 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                 if (*(u32 *)&readbuf[6] != address) {
 223                         dev_err(&hdev->dev, "read register address error (%x,%x)\n",
 224                         *(u32 *)&readbuf[6], address);
 225                         goto exit_readbuf;
 226                 }
 227
 228                 if (*(u16 *)&readbuf[10] != 1) {
 229                         dev_err(&hdev->dev, "read register size error (%x)\n",
 230                         *(u16 *)&readbuf[10]);
 231                         goto exit_readbuf;
 232                 }
 233
 234                 check_sum = t4_calc_check_sum(readbuf, 6, 7);
 235                 if (*(u16 *)&readbuf[13] != check_sum) {
 236                         dev_err(&hdev->dev, "read register checksum error (%x,%x)\n",
 237                         *(u16 *)&readbuf[13], check_sum);
 238                         goto exit_readbuf;
 239                 }
 240
 241                 *read_val = readbuf[12];
 242         }
 243
 244         ret = 0;
 245
 246 exit_readbuf:
 247         kfree(readbuf);
 248 exit:
 249         kfree(input);
 250         return ret;
 251 }
 252
 253 static int u1_read_write_register(struct hid_device *hdev, u32 address,
 254         u8 *read_val, u8 write_val, bool read_flag)
 255 {
 256         int ret, i;
 257         u8 check_sum;
 258         u8 *input;
 259         u8 *readbuf;
 260
 261         input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 262         if (!input)
 263                 return -ENOMEM;
 264
 265         input[0] = U1_FEATURE_REPORT_ID;
 266         if (read_flag) {
 267                 input[1] = U1_CMD_REGISTER_READ;
 268                 input[6] = 0x00;
 269         } else {
 270                 input[1] = U1_CMD_REGISTER_WRITE;
 271                 input[6] = write_val;
 272         }
 273
 274         put_unaligned_le32(address, input + 2);
 275
 276         /* Calculate the checksum */
 277         check_sum = U1_FEATURE_REPORT_LEN_ALL;
 278         for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
 279                 check_sum += input[i];
 280
 281         input[7] = check_sum;
 282         ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
 283                         U1_FEATURE_REPORT_LEN,
 284                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 285
 286         if (ret < 0) {
 287                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 288                 goto exit;
 289         }
 290
 291         if (read_flag) {
 292                 readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 293                 if (!readbuf) {
 294                         ret = -ENOMEM;
 295                         goto exit;
 296                 }
 297
 298                 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
 299                                 U1_FEATURE_REPORT_LEN,
 300                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 301
 302                 if (ret < 0) {
 303                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 304                         kfree(readbuf);
 305                         goto exit;
 306                 }
 307
 308                 *read_val = readbuf[6];
 309
 310                 kfree(readbuf);
 311         }
 312
 313         ret = 0;
 314
 315 exit:
 316         kfree(input);
 317         return ret;
 318 }
 319
 320 static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size)
 321 {
 322         unsigned int x, y, z;
 323         int i;
 324         struct t4_input_report *p_report = (struct t4_input_report *)data;
 325
 326         if (!data)
 327                 return 0;
 328         for (i = 0; i < hdata->max_fingers; i++) {
 329                 x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo;
 330                 y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo;
 331                 y = hdata->y_max - y + hdata->y_min;
 332                 z = (p_report->contact[i].palm < 0x80 &&
 333                         p_report->contact[i].palm > 0) * 62;
 334                 if (x == 0xffff) {
 335                         x = 0;
 336                         y = 0;
 337                         z = 0;
 338                 }
 339                 input_mt_slot(hdata->input, i);
 340
 341                 input_mt_report_slot_state(hdata->input,
 342                         MT_TOOL_FINGER, z != 0);
 343
 344                 if (!z)
 345                         continue;
 346
 347                 input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
 348                 input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
 349                 input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
 350         }
 351         input_mt_sync_frame(hdata->input);
 352
 353         input_report_key(hdata->input, BTN_LEFT, p_report->button);
 354
 355         input_sync(hdata->input);
 356         return 1;
 357 }
 358
 359 static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size)
 360 {
 361         unsigned int x, y, z;
 362         int i;
 363         short sp_x, sp_y;
 364
 365         if (!data)
 366                 return 0;
 367         switch (data[0]) {
 368         case U1_MOUSE_REPORT_ID:
 369                 break;
 370         case U1_FEATURE_REPORT_ID:
 371                 break;
 372         case U1_ABSOLUTE_REPORT_ID:
 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_state(hdata->input,
 393                                         MT_TOOL_FINGER, 0);
 394                         }
 395                 }
 396
 397                 input_mt_sync_frame(hdata->input);
 398
 399                 input_report_key(hdata->input, BTN_LEFT,
 400                         data[1] & 0x1);
 401                 input_report_key(hdata->input, BTN_RIGHT,
 402                         (data[1] & 0x2));
 403                 input_report_key(hdata->input, BTN_MIDDLE,
 404                         (data[1] & 0x4));
 405
 406                 input_sync(hdata->input);
 407
 408                 return 1;
 409
 410         case U1_SP_ABSOLUTE_REPORT_ID:
 411                 sp_x = get_unaligned_le16(data+2);
 412                 sp_y = get_unaligned_le16(data+4);
 413
 414                 sp_x = sp_x / 8;
 415                 sp_y = sp_y / 8;
 416
 417                 input_report_rel(hdata->input2, REL_X, sp_x);
 418                 input_report_rel(hdata->input2, REL_Y, sp_y);
 419
 420                 input_report_key(hdata->input2, BTN_LEFT,
 421                         data[1] & 0x1);
 422                 input_report_key(hdata->input2, BTN_RIGHT,
 423                         (data[1] & 0x2));
 424                 input_report_key(hdata->input2, BTN_MIDDLE,
 425                         (data[1] & 0x4));
 426
 427                 input_sync(hdata->input2);
 428
 429                 return 1;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int alps_raw_event(struct hid_device *hdev,
 436                 struct hid_report *report, u8 *data, int size)
 437 {
 438         int ret = 0;
 439         struct alps_dev *hdata = hid_get_drvdata(hdev);
 440
 441         switch (hdev->product) {
 442         case HID_PRODUCT_ID_T4_BTNLESS:
 443                 ret = t4_raw_event(hdata, data, size);
 444                 break;
 445         default:
 446                 ret = u1_raw_event(hdata, data, size);
 447                 break;
 448         }
 449         return ret;
 450 }
 451
 452 static int __maybe_unused alps_post_reset(struct hid_device *hdev)
 453 {
 454         int ret = -1;
 455         struct alps_dev *data = hid_get_drvdata(hdev);
 456
 457         switch (data->dev_type) {
 458         case T4:
 459                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 460                         NULL, T4_I2C_ABS, false);
 461                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
 462                         NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 463                 break;
 464         case U1:
 465                 ret = u1_read_write_register(hdev,
 466                         ADDRESS_U1_DEV_CTRL_1, NULL,
 467                         U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
 468                 break;
 469         default:
 470                 break;
 471         }
 472         return ret;
 473 }
 474
 475 static int __maybe_unused alps_post_resume(struct hid_device *hdev)
 476 {
 477         return alps_post_reset(hdev);
 478 }
 479
 480 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
 481 {
 482         int ret;
 483         u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
 484         u8 pitch_x, pitch_y, resolution;
 485
 486         /* Device initialization */
 487         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 488                         &dev_ctrl, 0, true);
 489         if (ret < 0) {
 490                 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
 491                 goto exit;
 492         }
 493
 494         dev_ctrl &= ~U1_DISABLE_DEV;
 495         dev_ctrl |= U1_TP_ABS_MODE;
 496         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 497                         NULL, dev_ctrl, false);
 498         if (ret < 0) {
 499                 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
 500                 goto exit;
 501         }
 502
 503         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
 504                         &sen_line_num_x, 0, true);
 505         if (ret < 0) {
 506                 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
 507                 goto exit;
 508         }
 509
 510         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
 511                         &sen_line_num_y, 0, true);
 512                 if (ret < 0) {
 513                 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
 514                 goto exit;
 515         }
 516
 517         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
 518                         &pitch_x, 0, true);
 519         if (ret < 0) {
 520                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
 521                 goto exit;
 522         }
 523
 524         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
 525                         &pitch_y, 0, true);
 526         if (ret < 0) {
 527                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
 528                 goto exit;
 529         }
 530
 531         ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
 532                 &resolution, 0, true);
 533         if (ret < 0) {
 534                 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
 535                 goto exit;
 536         }
 537         pri_data->x_active_len_mm =
 538                 (pitch_x * (sen_line_num_x - 1)) / 10;
 539         pri_data->y_active_len_mm =
 540                 (pitch_y * (sen_line_num_y - 1)) / 10;
 541
 542         pri_data->x_max =
 543                 (resolution << 2) * (sen_line_num_x - 1);
 544         pri_data->x_min = 1;
 545         pri_data->y_max =
 546                 (resolution << 2) * (sen_line_num_y - 1);
 547         pri_data->y_min = 1;
 548
 549         ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
 550                         &tmp, 0, true);
 551         if (ret < 0) {
 552                 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
 553                 goto exit;
 554         }
 555         if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
 556                 pri_data->btn_cnt = (tmp & 0x0F);
 557         } else {
 558                 /* Button pad */
 559                 pri_data->btn_cnt = 1;
 560         }
 561
 562         pri_data->has_sp = 0;
 563         /* Check StickPointer device */
 564         ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
 565                         &tmp, 0, true);
 566         if (ret < 0) {
 567                 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
 568                 goto exit;
 569         }
 570         if (tmp & U1_DEVTYPE_SP_SUPPORT) {
 571                 dev_ctrl |= U1_SP_ABS_MODE;
 572                 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 573                         NULL, dev_ctrl, false);
 574                 if (ret < 0) {
 575                         dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
 576                         goto exit;
 577                 }
 578
 579                 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
 580                         &pri_data->sp_btn_info, 0, true);
 581                 if (ret < 0) {
 582                         dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
 583                         goto exit;
 584                 }
 585                 pri_data->has_sp = 1;
 586         }
 587         pri_data->max_fingers = 5;
 588 exit:
 589         return ret;
 590 }
 591
 592 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
 593 {
 594         int ret;
 595         u8 tmp, sen_line_num_x, sen_line_num_y;
 596
 597         ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
 598         if (ret < 0) {
 599                 dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
 600                 goto exit;
 601         }
 602         sen_line_num_x = 16 + ((tmp & 0x0F)  | (tmp & 0x08 ? 0xF0 : 0));
 603         sen_line_num_y = 12 + (((tmp & 0xF0) >> 4)  | (tmp & 0x80 ? 0xF0 : 0));
 604
 605         pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
 606         pri_data->x_min = T4_COUNT_PER_ELECTRODE;
 607         pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
 608         pri_data->y_min = T4_COUNT_PER_ELECTRODE;
 609         pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0;
 610         pri_data->btn_cnt = 1;
 611
 612         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
 613         if (ret < 0) {
 614                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 615                 goto exit;
 616         }
 617         tmp |= 0x02;
 618         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
 619         if (ret < 0) {
 620                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 621                 goto exit;
 622         }
 623
 624         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 625                                         NULL, T4_I2C_ABS, false);
 626         if (ret < 0) {
 627                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
 628                 goto exit;
 629         }
 630
 631         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL,
 632                                 T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 633         if (ret < 0) {
 634                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
 635                 goto exit;
 636         }
 637         pri_data->max_fingers = 5;
 638         pri_data->has_sp = 0;
 639 exit:
 640         return ret;
 641 }
 642
 643 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
 644 {
 645         struct alps_dev *data = hid_get_drvdata(hdev);
 646         struct input_dev *input = hi->input, *input2;
 647         int ret;
 648         int res_x, res_y, i;
 649
 650         data->input = input;
 651
 652         hid_dbg(hdev, "Opening low level driver\n");
 653         ret = hid_hw_open(hdev);
 654         if (ret)
 655                 return ret;
 656
 657         /* Allow incoming hid reports */
 658         hid_device_io_start(hdev);
 659         switch (data->dev_type) {
 660         case T4:
 661                 ret = T4_init(hdev, data);
 662                 break;
 663         case U1:
 664                 ret = u1_init(hdev, data);
 665                 break;
 666         default:
 667                 break;
 668         }
 669
 670         if (ret)
 671                 goto exit;
 672
 673         __set_bit(EV_ABS, input->evbit);
 674         input_set_abs_params(input, ABS_MT_POSITION_X,
 675                                                 data->x_min, data->x_max, 0, 0);
 676         input_set_abs_params(input, ABS_MT_POSITION_Y,
 677                                                 data->y_min, data->y_max, 0, 0);
 678
 679         if (data->x_active_len_mm && data->y_active_len_mm) {
 680                 res_x = (data->x_max - 1) / data->x_active_len_mm;
 681                 res_y = (data->y_max - 1) / data->y_active_len_mm;
 682
 683                 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
 684                 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
 685         }
 686
 687         input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
 688
 689         input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
 690
 691         __set_bit(EV_KEY, input->evbit);
 692
 693         if (data->btn_cnt == 1)
 694                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 695
 696         for (i = 0; i < data->btn_cnt; i++)
 697                 __set_bit(BTN_LEFT + i, input->keybit);
 698
 699         /* Stick device initialization */
 700         if (data->has_sp) {
 701                 input2 = input_allocate_device();
 702                 if (!input2) {
 703                         input_free_device(input2);
 704                         goto exit;
 705                 }
 706
 707                 data->input2 = input2;
 708                 input2->phys = input->phys;
 709                 input2->name = "DualPoint Stick";
 710                 input2->id.bustype = BUS_I2C;
 711                 input2->id.vendor  = input->id.vendor;
 712                 input2->id.product = input->id.product;
 713                 input2->id.version = input->id.version;
 714                 input2->dev.parent = input->dev.parent;
 715
 716                 __set_bit(EV_KEY, input2->evbit);
 717                 data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
 718                 for (i = 0; i < data->sp_btn_cnt; i++)
 719                         __set_bit(BTN_LEFT + i, input2->keybit);
 720
 721                 __set_bit(EV_REL, input2->evbit);
 722                 __set_bit(REL_X, input2->relbit);
 723                 __set_bit(REL_Y, input2->relbit);
 724                 __set_bit(INPUT_PROP_POINTER, input2->propbit);
 725                 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
 726
 727                 if (input_register_device(data->input2)) {
 728                         input_free_device(input2);
 729                         goto exit;
 730                 }
 731         }
 732
 733 exit:
 734         hid_device_io_stop(hdev);
 735         hid_hw_close(hdev);
 736         return ret;
 737 }
 738
 739 static int alps_input_mapping(struct hid_device *hdev,
 740                 struct hid_input *hi, struct hid_field *field,
 741                 struct hid_usage *usage, unsigned long **bit, int *max)
 742 {
 743         return -1;
 744 }
 745
 746 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
 747 {
 748         struct alps_dev *data = NULL;
 749         int ret;
 750         data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
 751         if (!data)
 752                 return -ENOMEM;
 753
 754         data->hdev = hdev;
 755         hid_set_drvdata(hdev, data);
 756
 757         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 758
 759         ret = hid_parse(hdev);
 760         if (ret) {
 761                 hid_err(hdev, "parse failed\n");
 762                 return ret;
 763         }
 764
 765         switch (hdev->product) {
 766         case HID_DEVICE_ID_ALPS_T4_BTNLESS:
 767                 data->dev_type = T4;
 768                 break;
 769         case HID_DEVICE_ID_ALPS_U1_DUAL:
 770         case HID_DEVICE_ID_ALPS_U1:
 771                 data->dev_type = U1;
 772                 break;
 773         default:
 774                 data->dev_type = UNKNOWN;
 775         }
 776
 777         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 778         if (ret) {
 779                 hid_err(hdev, "hw start failed\n");
 780                 return ret;
 781         }
 782
 783         return 0;
 784 }
 785
 786 static void alps_remove(struct hid_device *hdev)
 787 {
 788         hid_hw_stop(hdev);
 789 }
 790
 791 static const struct hid_device_id alps_id[] = {
 792         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 793                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
 794         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 795                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
 796         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 797                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
 798         { }
 799 };
 800 MODULE_DEVICE_TABLE(hid, alps_id);
 801
 802 static struct hid_driver alps_driver = {
 803         .name = "hid-alps",
 804         .id_table               = alps_id,
 805         .probe                  = alps_probe,
 806         .remove                 = alps_remove,
 807         .raw_event              = alps_raw_event,
 808         .input_mapping          = alps_input_mapping,
 809         .input_configured       = alps_input_configured,
 810 #ifdef CONFIG_PM
 811         .resume                 = alps_post_resume,
 812         .reset_resume           = alps_post_reset,
 813 #endif
 814 };
 815
 816 module_hid_driver(alps_driver);
 817
 818 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
 819 MODULE_DESCRIPTION("ALPS HID driver");
 820 MODULE_LICENSE("GPL");