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_ABSOLUTE_REPORT_ID_SECD  0x02 /* FW-PTP Absolute data ReportID */
  33 #define U1_FEATURE_REPORT_ID            0x05 /* Feature ReportID */
  34 #define U1_SP_ABSOLUTE_REPORT_ID        0x06 /* Feature ReportID */
  35
  36 #define U1_FEATURE_REPORT_LEN           0x08 /* Feature Report Length */
  37 #define U1_FEATURE_REPORT_LEN_ALL       0x0A
  38 #define U1_CMD_REGISTER_READ            0xD1
  39 #define U1_CMD_REGISTER_WRITE           0xD2
  40
  41 #define U1_DEVTYPE_SP_SUPPORT           0x10 /* SP Support */
  42 #define U1_DISABLE_DEV                          0x01
  43 #define U1_TP_ABS_MODE                          0x02
  44 #define U1_SP_ABS_MODE                          0x80
  45
  46 #define ADDRESS_U1_DEV_CTRL_1   0x00800040
  47 #define ADDRESS_U1_DEVICE_TYP   0x00800043
  48 #define ADDRESS_U1_NUM_SENS_X   0x00800047
  49 #define ADDRESS_U1_NUM_SENS_Y   0x00800048
  50 #define ADDRESS_U1_PITCH_SENS_X 0x00800049
  51 #define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
  52 #define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
  53 #define ADDRESS_U1_PAD_BTN              0x00800052
  54 #define ADDRESS_U1_SP_BTN               0x0080009F
  55
  56 #define T4_INPUT_REPORT_LEN                     sizeof(struct t4_input_report)
  57 #define T4_FEATURE_REPORT_LEN           T4_INPUT_REPORT_LEN
  58 #define T4_FEATURE_REPORT_ID            7
  59 #define T4_CMD_REGISTER_READ                    0x08
  60 #define T4_CMD_REGISTER_WRITE                   0x07
  61
  62 #define T4_ADDRESS_BASE                         0xC2C0
  63 #define PRM_SYS_CONFIG_1                        (T4_ADDRESS_BASE + 0x0002)
  64 #define T4_PRM_FEED_CONFIG_1            (T4_ADDRESS_BASE + 0x0004)
  65 #define T4_PRM_FEED_CONFIG_4            (T4_ADDRESS_BASE + 0x001A)
  66 #define T4_PRM_ID_CONFIG_3                      (T4_ADDRESS_BASE + 0x00B0)
  67
  68
  69 #define T4_FEEDCFG4_ADVANCED_ABS_ENABLE                 0x01
  70 #define T4_I2C_ABS      0x78
  71
  72 #define T4_COUNT_PER_ELECTRODE          256
  73 #define MAX_TOUCHES     5
  74
  75 enum dev_num {
  76         U1,
  77         T4,
  78         UNKNOWN,
  79 };
  80 /**
  81  * struct u1_data
  82  *
  83  * @input: pointer to the kernel input device
  84  * @input2: pointer to the kernel input2 device
  85  * @hdev: pointer to the struct hid_device
  86  *
  87  * @dev_type: device type
  88  * @max_fingers: total number of fingers
  89  * @has_sp: boolean of sp existense
  90  * @sp_btn_info: button information
  91  * @x_active_len_mm: active area length of X (mm)
  92  * @y_active_len_mm: active area length of Y (mm)
  93  * @x_max: maximum x coordinate value
  94  * @y_max: maximum y coordinate value
  95  * @x_min: minimum x coordinate value
  96  * @y_min: minimum y coordinate value
  97  * @btn_cnt: number of buttons
  98  * @sp_btn_cnt: number of stick buttons
  99  */
 100 struct alps_dev {
 101         struct input_dev *input;
 102         struct input_dev *input2;
 103         struct hid_device *hdev;
 104
 105         enum dev_num dev_type;
 106         u8  max_fingers;
 107         u8  has_sp;
 108         u8      sp_btn_info;
 109         u32     x_active_len_mm;
 110         u32     y_active_len_mm;
 111         u32     x_max;
 112         u32     y_max;
 113         u32     x_min;
 114         u32     y_min;
 115         u32     btn_cnt;
 116         u32     sp_btn_cnt;
 117 };
 118
 119 struct t4_contact_data {
 120         u8  palm;
 121         u8      x_lo;
 122         u8      x_hi;
 123         u8      y_lo;
 124         u8      y_hi;
 125 };
 126
 127 struct t4_input_report {
 128         u8  reportID;
 129         u8  numContacts;
 130         struct t4_contact_data contact[5];
 131         u8  button;
 132         u8  track[5];
 133         u8  zx[5], zy[5];
 134         u8  palmTime[5];
 135         u8  kilroy;
 136         u16 timeStamp;
 137 };
 138
 139 static u16 t4_calc_check_sum(u8 *buffer,
 140                 unsigned long offset, unsigned long length)
 141 {
 142         u16 sum1 = 0xFF, sum2 = 0xFF;
 143         unsigned long i = 0;
 144
 145         if (offset + length >= 50)
 146                 return 0;
 147
 148         while (length > 0) {
 149                 u32 tlen = length > 20 ? 20 : length;
 150
 151                 length -= tlen;
 152
 153                 do {
 154                         sum1 += buffer[offset + i];
 155                         sum2 += sum1;
 156                         i++;
 157                 } while (--tlen > 0);
 158
 159                 sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 160                 sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 161         }
 162
 163         sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 164         sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 165
 166         return(sum2 << 8 | sum1);
 167 }
 168
 169 static int t4_read_write_register(struct hid_device *hdev, u32 address,
 170         u8 *read_val, u8 write_val, bool read_flag)
 171 {
 172         int ret;
 173         u16 check_sum;
 174         u8 *input;
 175         u8 *readbuf = NULL;
 176
 177         input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 178         if (!input)
 179                 return -ENOMEM;
 180
 181         input[0] = T4_FEATURE_REPORT_ID;
 182         if (read_flag) {
 183                 input[1] = T4_CMD_REGISTER_READ;
 184                 input[8] = 0x00;
 185         } else {
 186                 input[1] = T4_CMD_REGISTER_WRITE;
 187                 input[8] = write_val;
 188         }
 189         put_unaligned_le32(address, input + 2);
 190         input[6] = 1;
 191         input[7] = 0;
 192
 193         /* Calculate the checksum */
 194         check_sum = t4_calc_check_sum(input, 1, 8);
 195         input[9] = (u8)check_sum;
 196         input[10] = (u8)(check_sum >> 8);
 197         input[11] = 0;
 198
 199         ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input,
 200                         T4_FEATURE_REPORT_LEN,
 201                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 202
 203         if (ret < 0) {
 204                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 205                 goto exit;
 206         }
 207
 208         if (read_flag) {
 209                 readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 210                 if (!readbuf) {
 211                         ret = -ENOMEM;
 212                         goto exit;
 213                 }
 214
 215                 ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf,
 216                                 T4_FEATURE_REPORT_LEN,
 217                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 218                 if (ret < 0) {
 219                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 220                         goto exit_readbuf;
 221                 }
 222
 223                 ret = -EINVAL;
 224
 225                 if (*(u32 *)&readbuf[6] != address) {
 226                         dev_err(&hdev->dev, "read register address error (%x,%x)\n",
 227                                 *(u32 *)&readbuf[6], address);
 228                         goto exit_readbuf;
 229                 }
 230
 231                 if (*(u16 *)&readbuf[10] != 1) {
 232                         dev_err(&hdev->dev, "read register size error (%x)\n",
 233                                 *(u16 *)&readbuf[10]);
 234                         goto exit_readbuf;
 235                 }
 236
 237                 check_sum = t4_calc_check_sum(readbuf, 6, 7);
 238                 if (*(u16 *)&readbuf[13] != check_sum) {
 239                         dev_err(&hdev->dev, "read register checksum error (%x,%x)\n",
 240                                 *(u16 *)&readbuf[13], check_sum);
 241                         goto exit_readbuf;
 242                 }
 243
 244                 *read_val = readbuf[12];
 245         }
 246
 247         ret = 0;
 248
 249 exit_readbuf:
 250         kfree(readbuf);
 251 exit:
 252         kfree(input);
 253         return ret;
 254 }
 255
 256 static int u1_read_write_register(struct hid_device *hdev, u32 address,
 257         u8 *read_val, u8 write_val, bool read_flag)
 258 {
 259         int ret, i;
 260         u8 check_sum;
 261         u8 *input;
 262         u8 *readbuf;
 263
 264         input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 265         if (!input)
 266                 return -ENOMEM;
 267
 268         input[0] = U1_FEATURE_REPORT_ID;
 269         if (read_flag) {
 270                 input[1] = U1_CMD_REGISTER_READ;
 271                 input[6] = 0x00;
 272         } else {
 273                 input[1] = U1_CMD_REGISTER_WRITE;
 274                 input[6] = write_val;
 275         }
 276
 277         put_unaligned_le32(address, input + 2);
 278
 279         /* Calculate the checksum */
 280         check_sum = U1_FEATURE_REPORT_LEN_ALL;
 281         for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
 282                 check_sum += input[i];
 283
 284         input[7] = check_sum;
 285         ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
 286                         U1_FEATURE_REPORT_LEN,
 287                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 288
 289         if (ret < 0) {
 290                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 291                 goto exit;
 292         }
 293
 294         if (read_flag) {
 295                 readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 296                 if (!readbuf) {
 297                         ret = -ENOMEM;
 298                         goto exit;
 299                 }
 300
 301                 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
 302                                 U1_FEATURE_REPORT_LEN,
 303                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 304
 305                 if (ret < 0) {
 306                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 307                         kfree(readbuf);
 308                         goto exit;
 309                 }
 310
 311                 *read_val = readbuf[6];
 312
 313                 kfree(readbuf);
 314         }
 315
 316         ret = 0;
 317
 318 exit:
 319         kfree(input);
 320         return ret;
 321 }
 322
 323 static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size)
 324 {
 325         unsigned int x, y, z;
 326         int i;
 327         struct t4_input_report *p_report = (struct t4_input_report *)data;
 328
 329         if (!data)
 330                 return 0;
 331         for (i = 0; i < hdata->max_fingers; i++) {
 332                 x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo;
 333                 y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo;
 334                 y = hdata->y_max - y + hdata->y_min;
 335                 z = (p_report->contact[i].palm < 0x80 &&
 336                         p_report->contact[i].palm > 0) * 62;
 337                 if (x == 0xffff) {
 338                         x = 0;
 339                         y = 0;
 340                         z = 0;
 341                 }
 342                 input_mt_slot(hdata->input, i);
 343
 344                 input_mt_report_slot_state(hdata->input,
 345                         MT_TOOL_FINGER, z != 0);
 346
 347                 if (!z)
 348                         continue;
 349
 350                 input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
 351                 input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
 352                 input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
 353         }
 354         input_mt_sync_frame(hdata->input);
 355
 356         input_report_key(hdata->input, BTN_LEFT, p_report->button);
 357
 358         input_sync(hdata->input);
 359         return 1;
 360 }
 361
 362 static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size)
 363 {
 364         unsigned int x, y, z;
 365         int i;
 366         short sp_x, sp_y;
 367
 368         if (!data)
 369                 return 0;
 370         switch (data[0]) {
 371         case U1_MOUSE_REPORT_ID:
 372                 break;
 373         case U1_FEATURE_REPORT_ID:
 374                 break;
 375         case U1_ABSOLUTE_REPORT_ID:
 376         case U1_ABSOLUTE_REPORT_ID_SECD:
 377                 for (i = 0; i < hdata->max_fingers; i++) {
 378                         u8 *contact = &data[i * 5];
 379
 380                         x = get_unaligned_le16(contact + 3);
 381                         y = get_unaligned_le16(contact + 5);
 382                         z = contact[7] & 0x7F;
 383
 384                         input_mt_slot(hdata->input, i);
 385
 386                         if (z != 0) {
 387                                 input_mt_report_slot_state(hdata->input,
 388                                         MT_TOOL_FINGER, 1);
 389                                 input_report_abs(hdata->input,
 390                                         ABS_MT_POSITION_X, x);
 391                                 input_report_abs(hdata->input,
 392                                         ABS_MT_POSITION_Y, y);
 393                                 input_report_abs(hdata->input,
 394                                         ABS_MT_PRESSURE, z);
 395                         } else {
 396                                 input_mt_report_slot_state(hdata->input,
 397                                         MT_TOOL_FINGER, 0);
 398                         }
 399                 }
 400
 401                 input_mt_sync_frame(hdata->input);
 402
 403                 input_report_key(hdata->input, BTN_LEFT,
 404                         data[1] & 0x1);
 405                 input_report_key(hdata->input, BTN_RIGHT,
 406                         (data[1] & 0x2));
 407                 input_report_key(hdata->input, BTN_MIDDLE,
 408                         (data[1] & 0x4));
 409
 410                 input_sync(hdata->input);
 411
 412                 return 1;
 413
 414         case U1_SP_ABSOLUTE_REPORT_ID:
 415                 sp_x = get_unaligned_le16(data+2);
 416                 sp_y = get_unaligned_le16(data+4);
 417
 418                 sp_x = sp_x / 8;
 419                 sp_y = sp_y / 8;
 420
 421                 input_report_rel(hdata->input2, REL_X, sp_x);
 422                 input_report_rel(hdata->input2, REL_Y, sp_y);
 423
 424                 input_report_key(hdata->input2, BTN_LEFT,
 425                         data[1] & 0x1);
 426                 input_report_key(hdata->input2, BTN_RIGHT,
 427                         (data[1] & 0x2));
 428                 input_report_key(hdata->input2, BTN_MIDDLE,
 429                         (data[1] & 0x4));
 430
 431                 input_sync(hdata->input2);
 432
 433                 return 1;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int alps_raw_event(struct hid_device *hdev,
 440                 struct hid_report *report, u8 *data, int size)
 441 {
 442         int ret = 0;
 443         struct alps_dev *hdata = hid_get_drvdata(hdev);
 444
 445         switch (hdev->product) {
 446         case HID_PRODUCT_ID_T4_BTNLESS:
 447                 ret = t4_raw_event(hdata, data, size);
 448                 break;
 449         default:
 450                 ret = u1_raw_event(hdata, data, size);
 451                 break;
 452         }
 453         return ret;
 454 }
 455
 456 static int __maybe_unused alps_post_reset(struct hid_device *hdev)
 457 {
 458         int ret = -1;
 459         struct alps_dev *data = hid_get_drvdata(hdev);
 460
 461         switch (data->dev_type) {
 462         case T4:
 463                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 464                         NULL, T4_I2C_ABS, false);
 465                 if (ret < 0) {
 466                         dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n",
 467                                 ret);
 468                         goto exit;
 469                 }
 470
 471                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
 472                         NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 473                 if (ret < 0) {
 474                         dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n",
 475                                 ret);
 476                         goto exit;
 477                 }
 478                 break;
 479         case U1:
 480                 ret = u1_read_write_register(hdev,
 481                         ADDRESS_U1_DEV_CTRL_1, NULL,
 482                         U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
 483                 if (ret < 0) {
 484                         dev_err(&hdev->dev, "failed to change TP mode (%d)\n",
 485                                 ret);
 486                         goto exit;
 487                 }
 488                 break;
 489         default:
 490                 break;
 491         }
 492
 493 exit:
 494         return ret;
 495 }
 496
 497 static int __maybe_unused alps_post_resume(struct hid_device *hdev)
 498 {
 499         return alps_post_reset(hdev);
 500 }
 501
 502 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
 503 {
 504         int ret;
 505         u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
 506         u8 pitch_x, pitch_y, resolution;
 507
 508         /* Device initialization */
 509         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 510                         &dev_ctrl, 0, true);
 511         if (ret < 0) {
 512                 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
 513                 goto exit;
 514         }
 515
 516         dev_ctrl &= ~U1_DISABLE_DEV;
 517         dev_ctrl |= U1_TP_ABS_MODE;
 518         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 519                         NULL, dev_ctrl, false);
 520         if (ret < 0) {
 521                 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
 522                 goto exit;
 523         }
 524
 525         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
 526                         &sen_line_num_x, 0, true);
 527         if (ret < 0) {
 528                 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
 529                 goto exit;
 530         }
 531
 532         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
 533                         &sen_line_num_y, 0, true);
 534                 if (ret < 0) {
 535                 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
 536                 goto exit;
 537         }
 538
 539         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
 540                         &pitch_x, 0, true);
 541         if (ret < 0) {
 542                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
 543                 goto exit;
 544         }
 545
 546         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
 547                         &pitch_y, 0, true);
 548         if (ret < 0) {
 549                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
 550                 goto exit;
 551         }
 552
 553         ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
 554                 &resolution, 0, true);
 555         if (ret < 0) {
 556                 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
 557                 goto exit;
 558         }
 559         pri_data->x_active_len_mm =
 560                 (pitch_x * (sen_line_num_x - 1)) / 10;
 561         pri_data->y_active_len_mm =
 562                 (pitch_y * (sen_line_num_y - 1)) / 10;
 563
 564         pri_data->x_max =
 565                 (resolution << 2) * (sen_line_num_x - 1);
 566         pri_data->x_min = 1;
 567         pri_data->y_max =
 568                 (resolution << 2) * (sen_line_num_y - 1);
 569         pri_data->y_min = 1;
 570
 571         ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
 572                         &tmp, 0, true);
 573         if (ret < 0) {
 574                 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
 575                 goto exit;
 576         }
 577         if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
 578                 pri_data->btn_cnt = (tmp & 0x0F);
 579         } else {
 580                 /* Button pad */
 581                 pri_data->btn_cnt = 1;
 582         }
 583
 584         pri_data->has_sp = 0;
 585         /* Check StickPointer device */
 586         ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
 587                         &tmp, 0, true);
 588         if (ret < 0) {
 589                 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
 590                 goto exit;
 591         }
 592         if (tmp & U1_DEVTYPE_SP_SUPPORT) {
 593                 dev_ctrl |= U1_SP_ABS_MODE;
 594                 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 595                         NULL, dev_ctrl, false);
 596                 if (ret < 0) {
 597                         dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
 598                         goto exit;
 599                 }
 600
 601                 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
 602                         &pri_data->sp_btn_info, 0, true);
 603                 if (ret < 0) {
 604                         dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
 605                         goto exit;
 606                 }
 607                 pri_data->has_sp = 1;
 608         }
 609         pri_data->max_fingers = 5;
 610 exit:
 611         return ret;
 612 }
 613
 614 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
 615 {
 616         int ret;
 617         u8 tmp, sen_line_num_x, sen_line_num_y;
 618
 619         ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
 620         if (ret < 0) {
 621                 dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
 622                 goto exit;
 623         }
 624         sen_line_num_x = 16 + ((tmp & 0x0F)  | (tmp & 0x08 ? 0xF0 : 0));
 625         sen_line_num_y = 12 + (((tmp & 0xF0) >> 4)  | (tmp & 0x80 ? 0xF0 : 0));
 626
 627         pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
 628         pri_data->x_min = T4_COUNT_PER_ELECTRODE;
 629         pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
 630         pri_data->y_min = T4_COUNT_PER_ELECTRODE;
 631         pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0;
 632         pri_data->btn_cnt = 1;
 633
 634         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
 635         if (ret < 0) {
 636                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 637                 goto exit;
 638         }
 639         tmp |= 0x02;
 640         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
 641         if (ret < 0) {
 642                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 643                 goto exit;
 644         }
 645
 646         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 647                                         NULL, T4_I2C_ABS, false);
 648         if (ret < 0) {
 649                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
 650                 goto exit;
 651         }
 652
 653         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL,
 654                                 T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 655         if (ret < 0) {
 656                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
 657                 goto exit;
 658         }
 659         pri_data->max_fingers = 5;
 660         pri_data->has_sp = 0;
 661 exit:
 662         return ret;
 663 }
 664
 665 static int alps_sp_open(struct input_dev *dev)
 666 {
 667         struct hid_device *hid = input_get_drvdata(dev);
 668
 669         return hid_hw_open(hid);
 670 }
 671
 672 static void alps_sp_close(struct input_dev *dev)
 673 {
 674         struct hid_device *hid = input_get_drvdata(dev);
 675
 676         hid_hw_close(hid);
 677 }
 678
 679 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
 680 {
 681         struct alps_dev *data = hid_get_drvdata(hdev);
 682         struct input_dev *input = hi->input, *input2;
 683         int ret;
 684         int res_x, res_y, i;
 685
 686         data->input = input;
 687
 688         hid_dbg(hdev, "Opening low level driver\n");
 689         ret = hid_hw_open(hdev);
 690         if (ret)
 691                 return ret;
 692
 693         /* Allow incoming hid reports */
 694         hid_device_io_start(hdev);
 695         switch (data->dev_type) {
 696         case T4:
 697                 ret = T4_init(hdev, data);
 698                 break;
 699         case U1:
 700                 ret = u1_init(hdev, data);
 701                 break;
 702         default:
 703                 break;
 704         }
 705
 706         if (ret)
 707                 goto exit;
 708
 709         __set_bit(EV_ABS, input->evbit);
 710         input_set_abs_params(input, ABS_MT_POSITION_X,
 711                                                 data->x_min, data->x_max, 0, 0);
 712         input_set_abs_params(input, ABS_MT_POSITION_Y,
 713                                                 data->y_min, data->y_max, 0, 0);
 714
 715         if (data->x_active_len_mm && data->y_active_len_mm) {
 716                 res_x = (data->x_max - 1) / data->x_active_len_mm;
 717                 res_y = (data->y_max - 1) / data->y_active_len_mm;
 718
 719                 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
 720                 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
 721         }
 722
 723         input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
 724
 725         input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
 726
 727         __set_bit(EV_KEY, input->evbit);
 728
 729         if (data->btn_cnt == 1)
 730                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 731
 732         for (i = 0; i < data->btn_cnt; i++)
 733                 __set_bit(BTN_LEFT + i, input->keybit);
 734
 735         /* Stick device initialization */
 736         if (data->has_sp) {
 737                 input2 = input_allocate_device();
 738                 if (!input2) {
 739                         ret = -ENOMEM;
 740                         goto exit;
 741                 }
 742
 743                 data->input2 = input2;
 744                 input2->phys = input->phys;
 745                 input2->name = "DualPoint Stick";
 746                 input2->id.bustype = BUS_I2C;
 747                 input2->id.vendor  = input->id.vendor;
 748                 input2->id.product = input->id.product;
 749                 input2->id.version = input->id.version;
 750                 input2->dev.parent = input->dev.parent;
 751
 752                 input_set_drvdata(input2, hdev);
 753                 input2->open = alps_sp_open;
 754                 input2->close = alps_sp_close;
 755
 756                 __set_bit(EV_KEY, input2->evbit);
 757                 data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
 758                 for (i = 0; i < data->sp_btn_cnt; i++)
 759                         __set_bit(BTN_LEFT + i, input2->keybit);
 760
 761                 __set_bit(EV_REL, input2->evbit);
 762                 __set_bit(REL_X, input2->relbit);
 763                 __set_bit(REL_Y, input2->relbit);
 764                 __set_bit(INPUT_PROP_POINTER, input2->propbit);
 765                 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
 766
 767                 if (input_register_device(data->input2)) {
 768                         input_free_device(input2);
 769                         ret = -ENOENT;
 770                         goto exit;
 771                 }
 772         }
 773
 774 exit:
 775         hid_device_io_stop(hdev);
 776         hid_hw_close(hdev);
 777         return ret;
 778 }
 779
 780 static int alps_input_mapping(struct hid_device *hdev,
 781                 struct hid_input *hi, struct hid_field *field,
 782                 struct hid_usage *usage, unsigned long **bit, int *max)
 783 {
 784         return -1;
 785 }
 786
 787 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
 788 {
 789         struct alps_dev *data = NULL;
 790         int ret;
 791         data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
 792         if (!data)
 793                 return -ENOMEM;
 794
 795         data->hdev = hdev;
 796         hid_set_drvdata(hdev, data);
 797
 798         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 799
 800         ret = hid_parse(hdev);
 801         if (ret) {
 802                 hid_err(hdev, "parse failed\n");
 803                 return ret;
 804         }
 805
 806         switch (hdev->product) {
 807         case HID_DEVICE_ID_ALPS_T4_BTNLESS:
 808                 data->dev_type = T4;
 809                 break;
 810         case HID_DEVICE_ID_ALPS_U1_DUAL:
 811         case HID_DEVICE_ID_ALPS_U1:
 812         case HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY:
 813                 data->dev_type = U1;
 814                 break;
 815         default:
 816                 data->dev_type = UNKNOWN;
 817         }
 818
 819         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 820         if (ret) {
 821                 hid_err(hdev, "hw start failed\n");
 822                 return ret;
 823         }
 824
 825         return 0;
 826 }
 827
 828 static void alps_remove(struct hid_device *hdev)
 829 {
 830         hid_hw_stop(hdev);
 831 }
 832
 833 static const struct hid_device_id alps_id[] = {
 834         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 835                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
 836         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 837                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
 838         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 839                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY) },
 840         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 841                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
 842         { }
 843 };
 844 MODULE_DEVICE_TABLE(hid, alps_id);
 845
 846 static struct hid_driver alps_driver = {
 847         .name = "hid-alps",
 848         .id_table               = alps_id,
 849         .probe                  = alps_probe,
 850         .remove                 = alps_remove,
 851         .raw_event              = alps_raw_event,
 852         .input_mapping          = alps_input_mapping,
 853         .input_configured       = alps_input_configured,
 854 #ifdef CONFIG_PM
 855         .resume                 = alps_post_resume,
 856         .reset_resume           = alps_post_reset,
 857 #endif
 858 };
 859
 860 module_hid_driver(alps_driver);
 861
 862 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
 863 MODULE_DESCRIPTION("ALPS HID driver");
 864 MODULE_LICENSE("GPL");