drivers/hid/hid-alps.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/hid.h>
   8 #include <linux/input.h>
   9 #include <linux/input/mt.h>
  10 #include <linux/module.h>
  11 #include <asm/unaligned.h>
  12 #include "hid-ids.h"
  13
  14 /* ALPS Device Product ID */
  15 #define HID_PRODUCT_ID_T3_BTNLESS       0xD0C0
  16 #define HID_PRODUCT_ID_COSMO            0x1202
  17 #define HID_PRODUCT_ID_U1_PTP_1         0x1207
  18 #define HID_PRODUCT_ID_U1                       0x1209
  19 #define HID_PRODUCT_ID_U1_PTP_2         0x120A
  20 #define HID_PRODUCT_ID_U1_DUAL          0x120B
  21 #define HID_PRODUCT_ID_T4_BTNLESS       0x120C
  22
  23 #define DEV_SINGLEPOINT                         0x01
  24 #define DEV_DUALPOINT                           0x02
  25
  26 #define U1_MOUSE_REPORT_ID                      0x01 /* Mouse data ReportID */
  27 #define U1_ABSOLUTE_REPORT_ID           0x03 /* Absolute data ReportID */
  28 #define U1_ABSOLUTE_REPORT_ID_SECD  0x02 /* FW-PTP Absolute data ReportID */
  29 #define U1_FEATURE_REPORT_ID            0x05 /* Feature ReportID */
  30 #define U1_SP_ABSOLUTE_REPORT_ID        0x06 /* Feature ReportID */
  31
  32 #define U1_FEATURE_REPORT_LEN           0x08 /* Feature Report Length */
  33 #define U1_FEATURE_REPORT_LEN_ALL       0x0A
  34 #define U1_CMD_REGISTER_READ            0xD1
  35 #define U1_CMD_REGISTER_WRITE           0xD2
  36
  37 #define U1_DEVTYPE_SP_SUPPORT           0x10 /* SP Support */
  38 #define U1_DISABLE_DEV                          0x01
  39 #define U1_TP_ABS_MODE                          0x02
  40 #define U1_SP_ABS_MODE                          0x80
  41
  42 #define ADDRESS_U1_DEV_CTRL_1   0x00800040
  43 #define ADDRESS_U1_DEVICE_TYP   0x00800043
  44 #define ADDRESS_U1_NUM_SENS_X   0x00800047
  45 #define ADDRESS_U1_NUM_SENS_Y   0x00800048
  46 #define ADDRESS_U1_PITCH_SENS_X 0x00800049
  47 #define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
  48 #define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
  49 #define ADDRESS_U1_PAD_BTN              0x00800052
  50 #define ADDRESS_U1_SP_BTN               0x0080009F
  51
  52 #define T4_INPUT_REPORT_LEN                     sizeof(struct t4_input_report)
  53 #define T4_FEATURE_REPORT_LEN           T4_INPUT_REPORT_LEN
  54 #define T4_FEATURE_REPORT_ID            7
  55 #define T4_CMD_REGISTER_READ                    0x08
  56 #define T4_CMD_REGISTER_WRITE                   0x07
  57
  58 #define T4_ADDRESS_BASE                         0xC2C0
  59 #define PRM_SYS_CONFIG_1                        (T4_ADDRESS_BASE + 0x0002)
  60 #define T4_PRM_FEED_CONFIG_1            (T4_ADDRESS_BASE + 0x0004)
  61 #define T4_PRM_FEED_CONFIG_4            (T4_ADDRESS_BASE + 0x001A)
  62 #define T4_PRM_ID_CONFIG_3                      (T4_ADDRESS_BASE + 0x00B0)
  63
  64
  65 #define T4_FEEDCFG4_ADVANCED_ABS_ENABLE                 0x01
  66 #define T4_I2C_ABS      0x78
  67
  68 #define T4_COUNT_PER_ELECTRODE          256
  69 #define MAX_TOUCHES     5
  70
  71 enum dev_num {
  72         U1,
  73         T4,
  74         UNKNOWN,
  75 };
  76 /**
  77  * struct u1_data
  78  *
  79  * @input: pointer to the kernel input device
  80  * @input2: pointer to the kernel input2 device
  81  * @hdev: pointer to the struct hid_device
  82  *
  83  * @dev_type: device type
  84  * @max_fingers: total number of fingers
  85  * @has_sp: boolean of sp existense
  86  * @sp_btn_info: button information
  87  * @x_active_len_mm: active area length of X (mm)
  88  * @y_active_len_mm: active area length of Y (mm)
  89  * @x_max: maximum x coordinate value
  90  * @y_max: maximum y coordinate value
  91  * @x_min: minimum x coordinate value
  92  * @y_min: minimum y coordinate value
  93  * @btn_cnt: number of buttons
  94  * @sp_btn_cnt: number of stick buttons
  95  */
  96 struct alps_dev {
  97         struct input_dev *input;
  98         struct input_dev *input2;
  99         struct hid_device *hdev;
 100
 101         enum dev_num dev_type;
 102         u8  max_fingers;
 103         u8  has_sp;
 104         u8      sp_btn_info;
 105         u32     x_active_len_mm;
 106         u32     y_active_len_mm;
 107         u32     x_max;
 108         u32     y_max;
 109         u32     x_min;
 110         u32     y_min;
 111         u32     btn_cnt;
 112         u32     sp_btn_cnt;
 113 };
 114
 115 struct t4_contact_data {
 116         u8  palm;
 117         u8      x_lo;
 118         u8      x_hi;
 119         u8      y_lo;
 120         u8      y_hi;
 121 };
 122
 123 struct t4_input_report {
 124         u8  reportID;
 125         u8  numContacts;
 126         struct t4_contact_data contact[5];
 127         u8  button;
 128         u8  track[5];
 129         u8  zx[5], zy[5];
 130         u8  palmTime[5];
 131         u8  kilroy;
 132         u16 timeStamp;
 133 };
 134
 135 static u16 t4_calc_check_sum(u8 *buffer,
 136                 unsigned long offset, unsigned long length)
 137 {
 138         u16 sum1 = 0xFF, sum2 = 0xFF;
 139         unsigned long i = 0;
 140
 141         if (offset + length >= 50)
 142                 return 0;
 143
 144         while (length > 0) {
 145                 u32 tlen = length > 20 ? 20 : length;
 146
 147                 length -= tlen;
 148
 149                 do {
 150                         sum1 += buffer[offset + i];
 151                         sum2 += sum1;
 152                         i++;
 153                 } while (--tlen > 0);
 154
 155                 sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 156                 sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 157         }
 158
 159         sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 160         sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 161
 162         return(sum2 << 8 | sum1);
 163 }
 164
 165 static int t4_read_write_register(struct hid_device *hdev, u32 address,
 166         u8 *read_val, u8 write_val, bool read_flag)
 167 {
 168         int ret;
 169         u16 check_sum;
 170         u8 *input;
 171         u8 *readbuf = NULL;
 172
 173         input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 174         if (!input)
 175                 return -ENOMEM;
 176
 177         input[0] = T4_FEATURE_REPORT_ID;
 178         if (read_flag) {
 179                 input[1] = T4_CMD_REGISTER_READ;
 180                 input[8] = 0x00;
 181         } else {
 182                 input[1] = T4_CMD_REGISTER_WRITE;
 183                 input[8] = write_val;
 184         }
 185         put_unaligned_le32(address, input + 2);
 186         input[6] = 1;
 187         input[7] = 0;
 188
 189         /* Calculate the checksum */
 190         check_sum = t4_calc_check_sum(input, 1, 8);
 191         input[9] = (u8)check_sum;
 192         input[10] = (u8)(check_sum >> 8);
 193         input[11] = 0;
 194
 195         ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input,
 196                         T4_FEATURE_REPORT_LEN,
 197                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 198
 199         if (ret < 0) {
 200                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 201                 goto exit;
 202         }
 203
 204         if (read_flag) {
 205                 readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 206                 if (!readbuf) {
 207                         ret = -ENOMEM;
 208                         goto exit;
 209                 }
 210
 211                 ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf,
 212                                 T4_FEATURE_REPORT_LEN,
 213                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 214                 if (ret < 0) {
 215                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 216                         goto exit_readbuf;
 217                 }
 218
 219                 ret = -EINVAL;
 220
 221                 if (*(u32 *)&readbuf[6] != address) {
 222                         dev_err(&hdev->dev, "read register address error (%x,%x)\n",
 223                                 *(u32 *)&readbuf[6], address);
 224                         goto exit_readbuf;
 225                 }
 226
 227                 if (*(u16 *)&readbuf[10] != 1) {
 228                         dev_err(&hdev->dev, "read register size error (%x)\n",
 229                                 *(u16 *)&readbuf[10]);
 230                         goto exit_readbuf;
 231                 }
 232
 233                 check_sum = t4_calc_check_sum(readbuf, 6, 7);
 234                 if (*(u16 *)&readbuf[13] != check_sum) {
 235                         dev_err(&hdev->dev, "read register checksum error (%x,%x)\n",
 236                                 *(u16 *)&readbuf[13], check_sum);
 237                         goto exit_readbuf;
 238                 }
 239
 240                 *read_val = readbuf[12];
 241         }
 242
 243         ret = 0;
 244
 245 exit_readbuf:
 246         kfree(readbuf);
 247 exit:
 248         kfree(input);
 249         return ret;
 250 }
 251
 252 static int u1_read_write_register(struct hid_device *hdev, u32 address,
 253         u8 *read_val, u8 write_val, bool read_flag)
 254 {
 255         int ret, i;
 256         u8 check_sum;
 257         u8 *input;
 258         u8 *readbuf;
 259
 260         input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 261         if (!input)
 262                 return -ENOMEM;
 263
 264         input[0] = U1_FEATURE_REPORT_ID;
 265         if (read_flag) {
 266                 input[1] = U1_CMD_REGISTER_READ;
 267                 input[6] = 0x00;
 268         } else {
 269                 input[1] = U1_CMD_REGISTER_WRITE;
 270                 input[6] = write_val;
 271         }
 272
 273         put_unaligned_le32(address, input + 2);
 274
 275         /* Calculate the checksum */
 276         check_sum = U1_FEATURE_REPORT_LEN_ALL;
 277         for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
 278                 check_sum += input[i];
 279
 280         input[7] = check_sum;
 281         ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
 282                         U1_FEATURE_REPORT_LEN,
 283                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 284
 285         if (ret < 0) {
 286                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 287                 goto exit;
 288         }
 289
 290         if (read_flag) {
 291                 readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 292                 if (!readbuf) {
 293                         ret = -ENOMEM;
 294                         goto exit;
 295                 }
 296
 297                 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
 298                                 U1_FEATURE_REPORT_LEN,
 299                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 300
 301                 if (ret < 0) {
 302                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 303                         kfree(readbuf);
 304                         goto exit;
 305                 }
 306
 307                 *read_val = readbuf[6];
 308
 309                 kfree(readbuf);
 310         }
 311
 312         ret = 0;
 313
 314 exit:
 315         kfree(input);
 316         return ret;
 317 }
 318
 319 static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size)
 320 {
 321         unsigned int x, y, z;
 322         int i;
 323         struct t4_input_report *p_report = (struct t4_input_report *)data;
 324
 325         if (!data)
 326                 return 0;
 327         for (i = 0; i < hdata->max_fingers; i++) {
 328                 x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo;
 329                 y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo;
 330                 y = hdata->y_max - y + hdata->y_min;
 331                 z = (p_report->contact[i].palm < 0x80 &&
 332                         p_report->contact[i].palm > 0) * 62;
 333                 if (x == 0xffff) {
 334                         x = 0;
 335                         y = 0;
 336                         z = 0;
 337                 }
 338                 input_mt_slot(hdata->input, i);
 339
 340                 input_mt_report_slot_state(hdata->input,
 341                         MT_TOOL_FINGER, z != 0);
 342
 343                 if (!z)
 344                         continue;
 345
 346                 input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
 347                 input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
 348                 input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
 349         }
 350         input_mt_sync_frame(hdata->input);
 351
 352         input_report_key(hdata->input, BTN_LEFT, p_report->button);
 353
 354         input_sync(hdata->input);
 355         return 1;
 356 }
 357
 358 static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size)
 359 {
 360         unsigned int x, y, z;
 361         int i;
 362         short sp_x, sp_y;
 363
 364         if (!data)
 365                 return 0;
 366         switch (data[0]) {
 367         case U1_MOUSE_REPORT_ID:
 368                 break;
 369         case U1_FEATURE_REPORT_ID:
 370                 break;
 371         case U1_ABSOLUTE_REPORT_ID:
 372         case U1_ABSOLUTE_REPORT_ID_SECD:
 373                 for (i = 0; i < hdata->max_fingers; i++) {
 374                         u8 *contact = &data[i * 5];
 375
 376                         x = get_unaligned_le16(contact + 3);
 377                         y = get_unaligned_le16(contact + 5);
 378                         z = contact[7] & 0x7F;
 379
 380                         input_mt_slot(hdata->input, i);
 381
 382                         if (z != 0) {
 383                                 input_mt_report_slot_state(hdata->input,
 384                                         MT_TOOL_FINGER, 1);
 385                                 input_report_abs(hdata->input,
 386                                         ABS_MT_POSITION_X, x);
 387                                 input_report_abs(hdata->input,
 388                                         ABS_MT_POSITION_Y, y);
 389                                 input_report_abs(hdata->input,
 390                                         ABS_MT_PRESSURE, z);
 391                         } else {
 392                                 input_mt_report_slot_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                 if (ret < 0) {
 462                         dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n",
 463                                 ret);
 464                         goto exit;
 465                 }
 466
 467                 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
 468                         NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 469                 if (ret < 0) {
 470                         dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n",
 471                                 ret);
 472                         goto exit;
 473                 }
 474                 break;
 475         case U1:
 476                 ret = u1_read_write_register(hdev,
 477                         ADDRESS_U1_DEV_CTRL_1, NULL,
 478                         U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
 479                 if (ret < 0) {
 480                         dev_err(&hdev->dev, "failed to change TP mode (%d)\n",
 481                                 ret);
 482                         goto exit;
 483                 }
 484                 break;
 485         default:
 486                 break;
 487         }
 488
 489 exit:
 490         return ret;
 491 }
 492
 493 static int __maybe_unused alps_post_resume(struct hid_device *hdev)
 494 {
 495         return alps_post_reset(hdev);
 496 }
 497
 498 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
 499 {
 500         int ret;
 501         u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
 502         u8 pitch_x, pitch_y, resolution;
 503
 504         /* Device initialization */
 505         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 506                         &dev_ctrl, 0, true);
 507         if (ret < 0) {
 508                 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
 509                 goto exit;
 510         }
 511
 512         dev_ctrl &= ~U1_DISABLE_DEV;
 513         dev_ctrl |= U1_TP_ABS_MODE;
 514         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 515                         NULL, dev_ctrl, false);
 516         if (ret < 0) {
 517                 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
 518                 goto exit;
 519         }
 520
 521         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
 522                         &sen_line_num_x, 0, true);
 523         if (ret < 0) {
 524                 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
 525                 goto exit;
 526         }
 527
 528         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
 529                         &sen_line_num_y, 0, true);
 530                 if (ret < 0) {
 531                 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
 532                 goto exit;
 533         }
 534
 535         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
 536                         &pitch_x, 0, true);
 537         if (ret < 0) {
 538                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
 539                 goto exit;
 540         }
 541
 542         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
 543                         &pitch_y, 0, true);
 544         if (ret < 0) {
 545                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
 546                 goto exit;
 547         }
 548
 549         ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
 550                 &resolution, 0, true);
 551         if (ret < 0) {
 552                 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
 553                 goto exit;
 554         }
 555         pri_data->x_active_len_mm =
 556                 (pitch_x * (sen_line_num_x - 1)) / 10;
 557         pri_data->y_active_len_mm =
 558                 (pitch_y * (sen_line_num_y - 1)) / 10;
 559
 560         pri_data->x_max =
 561                 (resolution << 2) * (sen_line_num_x - 1);
 562         pri_data->x_min = 1;
 563         pri_data->y_max =
 564                 (resolution << 2) * (sen_line_num_y - 1);
 565         pri_data->y_min = 1;
 566
 567         ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
 568                         &tmp, 0, true);
 569         if (ret < 0) {
 570                 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
 571                 goto exit;
 572         }
 573         if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
 574                 pri_data->btn_cnt = (tmp & 0x0F);
 575         } else {
 576                 /* Button pad */
 577                 pri_data->btn_cnt = 1;
 578         }
 579
 580         pri_data->has_sp = 0;
 581         /* Check StickPointer device */
 582         ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
 583                         &tmp, 0, true);
 584         if (ret < 0) {
 585                 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
 586                 goto exit;
 587         }
 588         if (tmp & U1_DEVTYPE_SP_SUPPORT) {
 589                 dev_ctrl |= U1_SP_ABS_MODE;
 590                 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 591                         NULL, dev_ctrl, false);
 592                 if (ret < 0) {
 593                         dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
 594                         goto exit;
 595                 }
 596
 597                 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
 598                         &pri_data->sp_btn_info, 0, true);
 599                 if (ret < 0) {
 600                         dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
 601                         goto exit;
 602                 }
 603                 pri_data->has_sp = 1;
 604         }
 605         pri_data->max_fingers = 5;
 606 exit:
 607         return ret;
 608 }
 609
 610 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
 611 {
 612         int ret;
 613         u8 tmp, sen_line_num_x, sen_line_num_y;
 614
 615         ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
 616         if (ret < 0) {
 617                 dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
 618                 goto exit;
 619         }
 620         sen_line_num_x = 16 + ((tmp & 0x0F)  | (tmp & 0x08 ? 0xF0 : 0));
 621         sen_line_num_y = 12 + (((tmp & 0xF0) >> 4)  | (tmp & 0x80 ? 0xF0 : 0));
 622
 623         pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
 624         pri_data->x_min = T4_COUNT_PER_ELECTRODE;
 625         pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
 626         pri_data->y_min = T4_COUNT_PER_ELECTRODE;
 627         pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0;
 628         pri_data->btn_cnt = 1;
 629
 630         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
 631         if (ret < 0) {
 632                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 633                 goto exit;
 634         }
 635         tmp |= 0x02;
 636         ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
 637         if (ret < 0) {
 638                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 639                 goto exit;
 640         }
 641
 642         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 643                                         NULL, T4_I2C_ABS, false);
 644         if (ret < 0) {
 645                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
 646                 goto exit;
 647         }
 648
 649         ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL,
 650                                 T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 651         if (ret < 0) {
 652                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
 653                 goto exit;
 654         }
 655         pri_data->max_fingers = 5;
 656         pri_data->has_sp = 0;
 657 exit:
 658         return ret;
 659 }
 660
 661 static int alps_sp_open(struct input_dev *dev)
 662 {
 663         struct hid_device *hid = input_get_drvdata(dev);
 664
 665         return hid_hw_open(hid);
 666 }
 667
 668 static void alps_sp_close(struct input_dev *dev)
 669 {
 670         struct hid_device *hid = input_get_drvdata(dev);
 671
 672         hid_hw_close(hid);
 673 }
 674
 675 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
 676 {
 677         struct alps_dev *data = hid_get_drvdata(hdev);
 678         struct input_dev *input = hi->input, *input2;
 679         int ret;
 680         int res_x, res_y, i;
 681
 682         data->input = input;
 683
 684         hid_dbg(hdev, "Opening low level driver\n");
 685         ret = hid_hw_open(hdev);
 686         if (ret)
 687                 return ret;
 688
 689         /* Allow incoming hid reports */
 690         hid_device_io_start(hdev);
 691         switch (data->dev_type) {
 692         case T4:
 693                 ret = T4_init(hdev, data);
 694                 break;
 695         case U1:
 696                 ret = u1_init(hdev, data);
 697                 break;
 698         default:
 699                 break;
 700         }
 701
 702         if (ret)
 703                 goto exit;
 704
 705         __set_bit(EV_ABS, input->evbit);
 706         input_set_abs_params(input, ABS_MT_POSITION_X,
 707                                                 data->x_min, data->x_max, 0, 0);
 708         input_set_abs_params(input, ABS_MT_POSITION_Y,
 709                                                 data->y_min, data->y_max, 0, 0);
 710
 711         if (data->x_active_len_mm && data->y_active_len_mm) {
 712                 res_x = (data->x_max - 1) / data->x_active_len_mm;
 713                 res_y = (data->y_max - 1) / data->y_active_len_mm;
 714
 715                 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
 716                 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
 717         }
 718
 719         input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
 720
 721         input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
 722
 723         __set_bit(EV_KEY, input->evbit);
 724
 725         if (data->btn_cnt == 1)
 726                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 727
 728         for (i = 0; i < data->btn_cnt; i++)
 729                 __set_bit(BTN_LEFT + i, input->keybit);
 730
 731         /* Stick device initialization */
 732         if (data->has_sp) {
 733                 input2 = input_allocate_device();
 734                 if (!input2) {
 735                         ret = -ENOMEM;
 736                         goto exit;
 737                 }
 738
 739                 data->input2 = input2;
 740                 input2->phys = input->phys;
 741                 input2->name = "DualPoint Stick";
 742                 input2->id.bustype = BUS_I2C;
 743                 input2->id.vendor  = input->id.vendor;
 744                 input2->id.product = input->id.product;
 745                 input2->id.version = input->id.version;
 746                 input2->dev.parent = input->dev.parent;
 747
 748                 input_set_drvdata(input2, hdev);
 749                 input2->open = alps_sp_open;
 750                 input2->close = alps_sp_close;
 751
 752                 __set_bit(EV_KEY, input2->evbit);
 753                 data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
 754                 for (i = 0; i < data->sp_btn_cnt; i++)
 755                         __set_bit(BTN_LEFT + i, input2->keybit);
 756
 757                 __set_bit(EV_REL, input2->evbit);
 758                 __set_bit(REL_X, input2->relbit);
 759                 __set_bit(REL_Y, input2->relbit);
 760                 __set_bit(INPUT_PROP_POINTER, input2->propbit);
 761                 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
 762
 763                 if (input_register_device(data->input2)) {
 764                         input_free_device(input2);
 765                         ret = -ENOENT;
 766                         goto exit;
 767                 }
 768         }
 769
 770 exit:
 771         hid_device_io_stop(hdev);
 772         hid_hw_close(hdev);
 773         return ret;
 774 }
 775
 776 static int alps_input_mapping(struct hid_device *hdev,
 777                 struct hid_input *hi, struct hid_field *field,
 778                 struct hid_usage *usage, unsigned long **bit, int *max)
 779 {
 780         return -1;
 781 }
 782
 783 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
 784 {
 785         struct alps_dev *data = NULL;
 786         int ret;
 787         data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
 788         if (!data)
 789                 return -ENOMEM;
 790
 791         data->hdev = hdev;
 792         hid_set_drvdata(hdev, data);
 793
 794         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 795
 796         ret = hid_parse(hdev);
 797         if (ret) {
 798                 hid_err(hdev, "parse failed\n");
 799                 return ret;
 800         }
 801
 802         switch (hdev->product) {
 803         case HID_DEVICE_ID_ALPS_T4_BTNLESS:
 804                 data->dev_type = T4;
 805                 break;
 806         case HID_DEVICE_ID_ALPS_U1_DUAL:
 807         case HID_DEVICE_ID_ALPS_U1:
 808         case HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY:
 809                 data->dev_type = U1;
 810                 break;
 811         default:
 812                 data->dev_type = UNKNOWN;
 813         }
 814
 815         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 816         if (ret) {
 817                 hid_err(hdev, "hw start failed\n");
 818                 return ret;
 819         }
 820
 821         return 0;
 822 }
 823
 824 static void alps_remove(struct hid_device *hdev)
 825 {
 826         hid_hw_stop(hdev);
 827 }
 828
 829 static const struct hid_device_id alps_id[] = {
 830         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 831                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
 832         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 833                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
 834         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 835                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY) },
 836         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 837                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
 838         { }
 839 };
 840 MODULE_DEVICE_TABLE(hid, alps_id);
 841
 842 static struct hid_driver alps_driver = {
 843         .name = "hid-alps",
 844         .id_table               = alps_id,
 845         .probe                  = alps_probe,
 846         .remove                 = alps_remove,
 847         .raw_event              = alps_raw_event,
 848         .input_mapping          = alps_input_mapping,
 849         .input_configured       = alps_input_configured,
 850 #ifdef CONFIG_PM
 851         .resume                 = alps_post_resume,
 852         .reset_resume           = alps_post_reset,
 853 #endif
 854 };
 855
 856 module_hid_driver(alps_driver);
 857
 858 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
 859 MODULE_DESCRIPTION("ALPS HID driver");
 860 MODULE_LICENSE("GPL");