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