drivers/hid/hid-alps.c

   1 /*
   2  *  Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the Free
   6  * Software Foundation; either version 2 of the License, or (at your option)
   7  * any later version.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/hid.h>
  12 #include <linux/input.h>
  13 #include <linux/input/mt.h>
  14 #include <linux/module.h>
  15 #include <asm/unaligned.h>
  16 #include "hid-ids.h"
  17
  18 /* ALPS Device Product ID */
  19 #define HID_PRODUCT_ID_T3_BTNLESS       0xD0C0
  20 #define HID_PRODUCT_ID_COSMO            0x1202
  21 #define HID_PRODUCT_ID_U1_PTP_1         0x1207
  22 #define HID_PRODUCT_ID_U1                       0x1209
  23 #define HID_PRODUCT_ID_U1_PTP_2         0x120A
  24 #define HID_PRODUCT_ID_U1_DUAL          0x120B
  25 #define HID_PRODUCT_ID_T4_BTNLESS       0x120C
  26
  27 #define DEV_SINGLEPOINT                         0x01
  28 #define DEV_DUALPOINT                           0x02
  29
  30 #define U1_MOUSE_REPORT_ID                      0x01 /* Mouse data ReportID */
  31 #define U1_ABSOLUTE_REPORT_ID           0x03 /* Absolute data ReportID */
  32 #define U1_FEATURE_REPORT_ID            0x05 /* Feature ReportID */
  33 #define U1_SP_ABSOLUTE_REPORT_ID        0x06 /* Feature ReportID */
  34
  35 #define U1_FEATURE_REPORT_LEN           0x08 /* Feature Report Length */
  36 #define U1_FEATURE_REPORT_LEN_ALL       0x0A
  37 #define U1_CMD_REGISTER_READ            0xD1
  38 #define U1_CMD_REGISTER_WRITE           0xD2
  39
  40 #define U1_DEVTYPE_SP_SUPPORT           0x10 /* SP Support */
  41 #define U1_DISABLE_DEV                          0x01
  42 #define U1_TP_ABS_MODE                          0x02
  43 #define U1_SP_ABS_MODE                          0x80
  44
  45 #define ADDRESS_U1_DEV_CTRL_1   0x00800040
  46 #define ADDRESS_U1_DEVICE_TYP   0x00800043
  47 #define ADDRESS_U1_NUM_SENS_X   0x00800047
  48 #define ADDRESS_U1_NUM_SENS_Y   0x00800048
  49 #define ADDRESS_U1_PITCH_SENS_X 0x00800049
  50 #define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
  51 #define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
  52 #define ADDRESS_U1_PAD_BTN              0x00800052
  53 #define ADDRESS_U1_SP_BTN               0x0080009F
  54
  55 #define T4_INPUT_REPORT_LEN                     sizeof(T4_INPUT_REPORT)
  56 #define T4_FEATURE_REPORT_LEN           T4_INPUT_REPORT_LEN
  57 #define T4_FEATURE_REPORT_ID            7
  58 #define T4_CMD_REGISTER_READ                    0x08
  59 #define T4_CMD_REGISTER_WRITE                   0x07
  60
  61 #define T4_ADDRESS_BASE                         0xC2C0
  62 #define PRM_SYS_CONFIG_1                        (T4_ADDRESS_BASE + 0x0002)
  63 #define T4_PRM_FEED_CONFIG_1            (T4_ADDRESS_BASE + 0x0004)
  64 #define T4_PRM_FEED_CONFIG_4            (T4_ADDRESS_BASE + 0x001A)
  65 #define T4_PRM_ID_CONFIG_3                      (T4_ADDRESS_BASE + 0x00B0)
  66
  67 #define T4_FEEDCFG4_ADVANCED_ABS_ENABLE                 0x01
  68 #define T4_I2C_ABS      0x78
  69
  70 #define T4_COUNT_PER_ELECTRODE          256
  71 #define MAX_TOUCHES     5
  72
  73 typedef enum {
  74         U1,
  75         T4,
  76         UNKNOWN,
  77 } DEV_TYPE;
  78 /**
  79  * struct u1_data
  80  *
  81  * @input: pointer to the kernel input device
  82  * @input2: pointer to the kernel input2 device
  83  * @hdev: pointer to the struct hid_device
  84  *
  85  * @dev_type: device type
  86  * @max_fingers: total number of fingers
  87  * @has_sp: boolean of sp existense
  88  * @sp_btn_info: button information
  89  * @x_active_len_mm: active area length of X (mm)
  90  * @y_active_len_mm: active area length of Y (mm)
  91  * @x_max: maximum x coordinate value
  92  * @y_max: maximum y coordinate value
  93  * @x_min: minimum x coordinate value
  94  * @y_min: minimum y coordinate value
  95  * @btn_cnt: number of buttons
  96  * @sp_btn_cnt: number of stick buttons
  97  */
  98 struct alps_dev {
  99         struct input_dev *input;
 100         struct input_dev *input2;
 101         struct hid_device *hdev;
 102
 103         DEV_TYPE dev_type;
 104         u8  max_fingers;
 105         u8  has_sp;
 106         u8      sp_btn_info;
 107         u32     x_active_len_mm;
 108         u32     y_active_len_mm;
 109         u32     x_max;
 110         u32     y_max;
 111         u32     x_min;
 112         u32     y_min;
 113         u32     btn_cnt;
 114         u32     sp_btn_cnt;
 115 };
 116
 117 typedef struct _T4_CONTACT_DATA {
 118         u8  Palm;
 119         u8      x_lo;
 120         u8      x_hi;
 121         u8      y_lo;
 122         u8      y_hi;
 123 } T4_CONTACT_DATA, *PT4_CONTACT_DATA;
 124
 125 typedef struct _T4_INPUT_REPORT {
 126         u8  ReportID;
 127         u8  NumContacts;
 128         T4_CONTACT_DATA Contact[5];
 129         u8  Button;
 130         u8  Track[5];
 131         u8  ZX[5], ZY[5];
 132         u8  PalmTime[5];
 133         u8  Kilroy;
 134         u16 TimeStamp;
 135 } T4_INPUT_REPORT, *PT4_INPUT_REPORT;
 136
 137 static u16 t4_calc_check_sum(u8 *buffer, unsigned long offset, unsigned long length)
 138 {
 139         u16 sum1 = 0xFF, sum2 = 0xFF;
 140         unsigned long i = 0;
 141
 142         if (offset + length >= 50)
 143                 return 0;
 144
 145         while (length > 0) {
 146                 u32 tlen = length > 20 ? 20 : length;
 147
 148                 length -= tlen;
 149
 150                 do {
 151                         sum1 += buffer[offset + i];
 152                         sum2 += sum1;
 153                         i++;
 154                 } while (--tlen > 0);
 155
 156                 sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 157                 sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 158         }
 159
 160         sum1 = (sum1 & 0xFF) + (sum1 >> 8);
 161         sum2 = (sum2 & 0xFF) + (sum2 >> 8);
 162
 163         return(sum2 << 8 | sum1);
 164 }
 165
 166 static int T4_read_write_register(struct hid_device *hdev, u32 address,
 167         u8 *read_val, u8 write_val, bool read_flag)
 168 {
 169         int ret;
 170         u16 check_sum;
 171         u8 *input;
 172         u8 *readbuf;
 173
 174         input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 175         if (!input)
 176                 return -ENOMEM;
 177
 178         input[0] = T4_FEATURE_REPORT_ID;
 179         if (read_flag) {
 180                 input[1] = T4_CMD_REGISTER_READ;
 181                 input[8] = 0x00;
 182         } else {
 183                 input[1] = T4_CMD_REGISTER_WRITE;
 184                 input[8] = write_val;
 185         }
 186         put_unaligned_le32(address, input + 2);
 187         input[6] = 1;
 188         input[7] = 0;
 189
 190         /*Calculate amd append the checksum*/
 191         check_sum = t4_calc_check_sum(input, 1, 8);
 192         input[9] = (u8)check_sum;
 193         input[10] = (u8)(check_sum >> 8);
 194         input[11] = 0;
 195
 196         ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input,
 197                         T4_FEATURE_REPORT_LEN,
 198                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 199
 200         if (ret < 0) {
 201                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 202                 goto exit;
 203         }
 204
 205         if (read_flag) {
 206                 readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
 207                 if (!readbuf) {
 208                         kfree(input);
 209                         return -ENOMEM;
 210                 }
 211
 212                 ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf,
 213                                 T4_FEATURE_REPORT_LEN,
 214                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 215                 if (ret < 0) {
 216                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 217                         goto exit;
 218                 }
 219                 if (*(u32 *)&readbuf[6] != address)
 220                         hid_alert(hdev, "T4_read_write_register address error %x %x\n", *(u32 *)&readbuf[6], address);
 221                 if (*(u16 *)&readbuf[10] != 1)
 222                         hid_alert(hdev, "T4_read_write_register size error %x\n", *(u16 *)&readbuf[10]);
 223                 check_sum = t4_calc_check_sum(readbuf, 6, 7);
 224                 if (*(u16 *)&readbuf[13] != check_sum)
 225                         hid_alert(hdev, "T4_read_write_register checksum error %x %x\n", *(u16 *)&readbuf[13], check_sum);
 226                 *read_val = readbuf[12];
 227
 228                 kfree(readbuf);
 229         }
 230
 231         ret = 0;
 232
 233 exit:
 234         kfree(input);
 235         return ret;
 236 }
 237
 238 static int u1_read_write_register(struct hid_device *hdev, u32 address,
 239         u8 *read_val, u8 write_val, bool read_flag)
 240 {
 241         int ret, i;
 242         u8 check_sum;
 243         u8 *input;
 244         u8 *readbuf;
 245
 246         input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 247         if (!input)
 248                 return -ENOMEM;
 249
 250         input[0] = U1_FEATURE_REPORT_ID;
 251         if (read_flag) {
 252                 input[1] = U1_CMD_REGISTER_READ;
 253                 input[6] = 0x00;
 254         } else {
 255                 input[1] = U1_CMD_REGISTER_WRITE;
 256                 input[6] = write_val;
 257         }
 258
 259         put_unaligned_le32(address, input + 2);
 260
 261         /* Calculate the checksum */
 262         check_sum = U1_FEATURE_REPORT_LEN_ALL;
 263         for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
 264                 check_sum += input[i];
 265
 266         input[7] = check_sum;
 267         ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
 268                         U1_FEATURE_REPORT_LEN,
 269                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 270
 271         if (ret < 0) {
 272                 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
 273                 goto exit;
 274         }
 275
 276         if (read_flag) {
 277                 readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
 278                 if (!readbuf) {
 279                         kfree(input);
 280                         return -ENOMEM;
 281                 }
 282
 283                 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
 284                                 U1_FEATURE_REPORT_LEN,
 285                                 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 286
 287                 if (ret < 0) {
 288                         dev_err(&hdev->dev, "failed read register (%d)\n", ret);
 289                         goto exit;
 290                 }
 291
 292                 *read_val = readbuf[6];
 293
 294                 kfree(readbuf);
 295         }
 296
 297         ret = 0;
 298
 299 exit:
 300         kfree(input);
 301         return ret;
 302 }
 303
 304 static int T4_raw_event(struct alps_dev *hdata, u8 *data, int size)
 305 {
 306         unsigned int x, y, z;
 307         int i;
 308         PT4_INPUT_REPORT p_report = (PT4_INPUT_REPORT)data;
 309
 310         if (!data)
 311                 return 0;
 312         for (i = 0; i < hdata->max_fingers; i++) {
 313                 x = p_report->Contact[i].x_hi << 8 | p_report->Contact[i].x_lo;
 314                 y = p_report->Contact[i].y_hi << 8 | p_report->Contact[i].y_lo;
 315                 y = hdata->y_max - y + hdata->y_min;
 316                 z = (p_report->Contact[i].Palm < 0x80 && p_report->Contact[i].Palm > 0) * 62;
 317                 if (x == 0xffff)
 318                         x = 0, y = 0, z = 0;
 319                 input_mt_slot(hdata->input, i);
 320
 321                 if (z != 0) {
 322                         input_mt_report_slot_state(hdata->input, MT_TOOL_FINGER, 1);
 323                 } else {
 324                         input_mt_report_slot_state(hdata->input, MT_TOOL_FINGER, 0);
 325                         input_report_abs(hdata->input, ABS_MT_PRESSURE, 0);
 326                         continue;
 327                 }
 328
 329                 input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
 330                 input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
 331                 input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
 332         }
 333         input_mt_sync_frame(hdata->input);
 334
 335         input_report_key(hdata->input, BTN_LEFT,        p_report->Button);
 336
 337         input_sync(hdata->input);
 338         return 1;
 339 }
 340
 341 static int U1_raw_event(struct alps_dev *hdata, u8 *data, int size)
 342 {
 343         unsigned int x, y, z;
 344         short sp_x, sp_y;
 345         int i;
 346
 347         if (!data)
 348                 return 0;
 349         switch (data[0]) {
 350         case U1_MOUSE_REPORT_ID:
 351                 break;
 352         case U1_FEATURE_REPORT_ID:
 353                 break;
 354         case U1_ABSOLUTE_REPORT_ID:
 355                 for (i = 0; i < hdata->max_fingers; i++) {
 356                         u8 *contact = &data[i * 5];
 357
 358                         x = get_unaligned_le16(contact + 3);
 359                         y = get_unaligned_le16(contact + 5);
 360                         z = contact[7] & 0x7F;
 361
 362                         input_mt_slot(hdata->input, i);
 363
 364                         if (z != 0) {
 365                                 input_mt_report_slot_state(hdata->input,
 366                                         MT_TOOL_FINGER, 1);
 367
 368                                 input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
 369                                 input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
 370                                 input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
 371                         } else {
 372                                 input_mt_report_slot_state(hdata->input,
 373                                         MT_TOOL_FINGER, 0);
 374                         }
 375                 }
 376
 377                 input_mt_sync_frame(hdata->input);
 378
 379                 input_report_key(hdata->input, BTN_LEFT,
 380                         data[1] & 0x1);
 381                 input_report_key(hdata->input, BTN_RIGHT,
 382                         (data[1] & 0x2) >> 1);
 383                 input_report_key(hdata->input, BTN_MIDDLE,
 384                         (data[1] & 0x4) >> 2);
 385
 386                 input_sync(hdata->input);
 387
 388                 return 1;
 389
 390         case U1_SP_ABSOLUTE_REPORT_ID:
 391                 sp_x = get_unaligned_le16(data + 2);
 392                 sp_y = get_unaligned_le16(data + 4);
 393
 394                 sp_x = sp_x / 8;
 395                 sp_y = sp_y / 8;
 396
 397                 input_report_rel(hdata->input2, REL_X, sp_x);
 398                 input_report_rel(hdata->input2, REL_Y, sp_y);
 399
 400                 input_report_key(hdata->input2, BTN_LEFT,
 401                         data[1] & 0x1);
 402                 input_report_key(hdata->input2, BTN_RIGHT,
 403                         (data[1] & 0x2) >> 1);
 404                 input_report_key(hdata->input2, BTN_MIDDLE,
 405                         (data[1] & 0x4) >> 2);
 406
 407                 input_sync(hdata->input2);
 408
 409                 return 1;
 410         }
 411         return 0;
 412 }
 413
 414 static int alps_raw_event(struct hid_device *hdev,
 415                 struct hid_report *report, u8 *data, int size)
 416 {
 417         int ret = 0;
 418         struct alps_dev *hdata = hid_get_drvdata(hdev);
 419
 420         if (hdev->product == HID_PRODUCT_ID_T4_BTNLESS)
 421                 ret = T4_raw_event(hdata, data, size);
 422         else
 423                 ret = U1_raw_event(hdata, data, size);
 424         return ret;
 425 }
 426
 427 #ifdef CONFIG_PM
 428 static int alps_post_reset(struct hid_device *hdev)
 429 {
 430         int ret = -1;
 431         struct alps_dev *data = hid_get_drvdata(hdev);
 432
 433         switch (data->dev_type) {
 434         case T4:
 435                 ret = T4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
 436                         NULL, T4_I2C_ABS, false);
 437                 ret = T4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
 438                         NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 439                 break;
 440         case U1:
 441                 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 442                         NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
 443                 break;
 444         default:
 445                 break;
 446         }
 447         return ret;
 448 }
 449
 450 static int alps_post_resume(struct hid_device *hdev)
 451 {
 452         return alps_post_reset(hdev);
 453 }
 454 #endif /* CONFIG_PM */
 455
 456 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
 457 {
 458         int ret;
 459         u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y, pitch_x, pitch_y, resolution;
 460         /* Device initialization */
 461         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 462                         &dev_ctrl, 0, true);
 463         if (ret < 0) {
 464                 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
 465                 goto exit;
 466         }
 467
 468         dev_ctrl &= ~U1_DISABLE_DEV;
 469         dev_ctrl |= U1_TP_ABS_MODE;
 470         ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 471                         NULL, dev_ctrl, false);
 472         if (ret < 0) {
 473                 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
 474                 goto exit;
 475         }
 476
 477         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
 478                         &sen_line_num_x, 0, true);
 479         if (ret < 0) {
 480                 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
 481                 goto exit;
 482         }
 483
 484         ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
 485                         &sen_line_num_y, 0, true);
 486                 if (ret < 0) {
 487                 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
 488                 goto exit;
 489         }
 490
 491         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
 492                         &pitch_x, 0, true);
 493         if (ret < 0) {
 494                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
 495                 goto exit;
 496         }
 497
 498         ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
 499                         &pitch_y, 0, true);
 500         if (ret < 0) {
 501                 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
 502                 goto exit;
 503         }
 504
 505         ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
 506                 &resolution, 0, true);
 507         if (ret < 0) {
 508                 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
 509                 goto exit;
 510         }
 511         pri_data->x_active_len_mm =
 512                 (pitch_x * (sen_line_num_x - 1)) / 10;
 513         pri_data->y_active_len_mm =
 514                 (pitch_y * (sen_line_num_y - 1)) / 10;
 515
 516         pri_data->x_max =
 517                 (resolution << 2) * (sen_line_num_x - 1);
 518         pri_data->x_min = 1;
 519         pri_data->y_max =
 520                 (resolution << 2) * (sen_line_num_y - 1);
 521         pri_data->y_min = 1;
 522
 523         ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
 524                         &tmp, 0, true);
 525         if (ret < 0) {
 526                 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
 527                 goto exit;
 528         }
 529         if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
 530                 pri_data->btn_cnt = (tmp & 0x0F);
 531         } else {
 532                 /* Button pad */
 533                 pri_data->btn_cnt = 1;
 534         }
 535
 536         pri_data->has_sp = 0;
 537         /* Check StickPointer device */
 538         ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
 539                         &tmp, 0, true);
 540         if (ret < 0) {
 541                 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
 542                 goto exit;
 543         }
 544         if (tmp & U1_DEVTYPE_SP_SUPPORT) {
 545                 dev_ctrl |= U1_SP_ABS_MODE;
 546                 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
 547                         NULL, dev_ctrl, false);
 548                 if (ret < 0) {
 549                         dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
 550                         goto exit;
 551                 }
 552
 553                 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
 554                         &pri_data->sp_btn_info, 0, true);
 555                 if (ret < 0) {
 556                         dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
 557                         goto exit;
 558                 }
 559                 pri_data->has_sp = 1;
 560         }
 561         pri_data->max_fingers = 5;
 562 exit:
 563         return ret;
 564 }
 565
 566 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
 567 {
 568         int ret;
 569         u8 tmp, sen_line_num_x, sen_line_num_y;
 570
 571         ret = T4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
 572         if (ret < 0) {
 573                 dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
 574                 goto exit;
 575         }
 576         sen_line_num_x = 16 + ((tmp & 0x0F)  | (tmp & 0x08 ? 0xF0 : 0));
 577         sen_line_num_y = 12 + (((tmp & 0xF0) >> 4)  | (tmp & 0x80 ? 0xF0 : 0));
 578
 579         pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
 580         pri_data->x_min = T4_COUNT_PER_ELECTRODE;
 581         pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
 582         pri_data->y_min = T4_COUNT_PER_ELECTRODE;
 583         pri_data->x_active_len_mm = 0;
 584         pri_data->y_active_len_mm = 0;
 585         pri_data->btn_cnt = 1;
 586
 587         ret = T4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
 588         if (ret < 0) {
 589                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 590                 goto exit;
 591         }
 592         tmp |= 0x02;
 593         ret = T4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
 594         if (ret < 0) {
 595                 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
 596                 goto exit;
 597         }
 598
 599         ret = T4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1, NULL, T4_I2C_ABS, false);
 600         if (ret < 0) {
 601                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
 602                 goto exit;
 603         }
 604
 605         ret = T4_read_write_register (hdev, T4_PRM_FEED_CONFIG_4, NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
 606         if (ret < 0) {
 607                 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
 608                 goto exit;
 609         }
 610         pri_data->max_fingers = 5;
 611         pri_data->has_sp = 0;
 612 exit:
 613         return ret;
 614 }
 615
 616 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
 617 {
 618         struct alps_dev *data = hid_get_drvdata(hdev);
 619         struct input_dev *input = hi->input, *input2;
 620         int ret;
 621         int res_x, res_y, i;
 622
 623         data->input = input;
 624
 625         hid_dbg(hdev, "Opening low level driver\n");
 626         ret = hid_hw_open(hdev);
 627         if (ret)
 628                 return ret;
 629
 630         /* Allow incoming hid reports */
 631         hid_device_io_start(hdev);
 632         if (data->dev_type == T4)
 633                 ret = T4_init(hdev, data);
 634         else
 635                 ret = u1_init(hdev, data);
 636         if (ret)
 637                 goto exit;
 638
 639         __set_bit(EV_ABS, input->evbit);
 640         input_set_abs_params(input, ABS_MT_POSITION_X, data->x_min, data->x_max, 0, 0);
 641         input_set_abs_params(input, ABS_MT_POSITION_Y, data->y_min, data->y_max, 0, 0);
 642
 643         if (data->x_active_len_mm && data->y_active_len_mm) {
 644                 res_x = (data->x_max - 1) / data->x_active_len_mm;
 645                 res_y = (data->y_max - 1) / data->y_active_len_mm;
 646
 647                 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
 648                 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
 649         }
 650
 651         input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
 652
 653         input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
 654
 655         __set_bit(EV_KEY, input->evbit);
 656
 657         if (data->btn_cnt == 1)
 658                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 659
 660         for (i = 0; i < data->btn_cnt; i++)
 661                 __set_bit(BTN_LEFT + i, input->keybit);
 662
 663         /* Stick device initialization */
 664         if (data->has_sp) {
 665                 input2 = input_allocate_device();
 666                 if (!input2) {
 667                         input_free_device(input2);
 668                         goto exit;
 669                 }
 670
 671                 data->input2 = input2;
 672                 input2->phys = input->phys;
 673                 input2->name = "DualPoint Stick";
 674                 input2->id.bustype = BUS_I2C;
 675                 input2->id.vendor  = input->id.vendor;
 676                 input2->id.product = input->id.product;
 677                 input2->id.version = input->id.version;
 678                 input2->dev.parent = input->dev.parent;
 679
 680                 __set_bit(EV_KEY, input2->evbit);
 681                 data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
 682                 for (i = 0; i < data->sp_btn_cnt; i++)
 683                         __set_bit(BTN_LEFT + i, input2->keybit);
 684
 685                 __set_bit(EV_REL, input2->evbit);
 686                 __set_bit(REL_X, input2->relbit);
 687                 __set_bit(REL_Y, input2->relbit);
 688                 __set_bit(INPUT_PROP_POINTER, input2->propbit);
 689                 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
 690
 691                 if (input_register_device(data->input2)) {
 692                         input_free_device(input2);
 693                         goto exit;
 694                 }
 695         }
 696
 697 exit:
 698         hid_device_io_stop(hdev);
 699         hid_hw_close(hdev);
 700         return ret;
 701 }
 702
 703 static int alps_input_mapping(struct hid_device *hdev,
 704                 struct hid_input *hi, struct hid_field *field,
 705                 struct hid_usage *usage, unsigned long **bit, int *max)
 706 {
 707         return -1;
 708 }
 709
 710 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
 711 {
 712         struct alps_dev *data = NULL;
 713         int ret;
 714
 715         data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
 716         if (!data)
 717                 return -ENOMEM;
 718
 719         data->hdev = hdev;
 720         hid_set_drvdata(hdev, data);
 721
 722         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 723
 724         ret = hid_parse(hdev);
 725         if (ret) {
 726                 hid_err(hdev, "parse failed\n");
 727                 return ret;
 728         }
 729         switch (hdev->product) {
 730         case HID_DEVICE_ID_ALPS_T4_BTNLESS:
 731                 data->dev_type = T4;
 732                 break;
 733         case HID_DEVICE_ID_ALPS_U1_DUAL:
 734         case HID_DEVICE_ID_ALPS_U1:
 735                 data->dev_type = U1;
 736                 break;
 737         default:
 738                 data->dev_type = UNKNOWN;
 739                 break;
 740         }
 741         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 742         if (ret) {
 743                 hid_err(hdev, "hw start failed\n");
 744                 return ret;
 745         }
 746
 747         return 0;
 748 }
 749
 750 static void alps_remove(struct hid_device *hdev)
 751 {
 752         hid_hw_stop(hdev);
 753 }
 754
 755 static const struct hid_device_id alps_id[] = {
 756         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 757                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
 758         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 759                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
 760         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
 761                 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
 762         { }
 763 };
 764 MODULE_DEVICE_TABLE(hid, alps_id);
 765
 766 static struct hid_driver alps_driver = {
 767         .name = "hid-alps",
 768         .id_table               = alps_id,
 769         .probe                  = alps_probe,
 770         .remove                 = alps_remove,
 771         .raw_event              = alps_raw_event,
 772         .input_mapping          = alps_input_mapping,
 773         .input_configured       = alps_input_configured,
 774 #ifdef CONFIG_PM
 775         .resume                 = alps_post_resume,
 776         .reset_resume           = alps_post_reset,
 777 #endif
 778 };
 779
 780 module_hid_driver(alps_driver);
 781
 782 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
 783 MODULE_DESCRIPTION("ALPS HID driver");
 784 MODULE_LICENSE("GPL");