1 /* 2 * Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com> 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the Free 6 * Software Foundation; either version 2 of the License, or (at your option) 7 * any later version. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/hid.h> 12 #include <linux/input.h> 13 #include <linux/input/mt.h> 14 #include <linux/module.h> 15 #include <asm/unaligned.h> 16 #include "hid-ids.h" 17 18 /* ALPS Device Product ID */ 19 #define HID_PRODUCT_ID_T3_BTNLESS 0xD0C0 20 #define HID_PRODUCT_ID_COSMO 0x1202 21 #define HID_PRODUCT_ID_U1_PTP_1 0x1207 22 #define HID_PRODUCT_ID_U1 0x1209 23 #define HID_PRODUCT_ID_U1_PTP_2 0x120A 24 #define HID_PRODUCT_ID_U1_DUAL 0x120B 25 #define HID_PRODUCT_ID_T4_BTNLESS 0x120C 26 27 #define DEV_SINGLEPOINT 0x01 28 #define DEV_DUALPOINT 0x02 29 30 #define U1_MOUSE_REPORT_ID 0x01 /* Mouse data ReportID */ 31 #define U1_ABSOLUTE_REPORT_ID 0x03 /* Absolute data ReportID */ 32 #define U1_FEATURE_REPORT_ID 0x05 /* Feature ReportID */ 33 #define U1_SP_ABSOLUTE_REPORT_ID 0x06 /* Feature ReportID */ 34 35 #define U1_FEATURE_REPORT_LEN 0x08 /* Feature Report Length */ 36 #define U1_FEATURE_REPORT_LEN_ALL 0x0A 37 #define U1_CMD_REGISTER_READ 0xD1 38 #define U1_CMD_REGISTER_WRITE 0xD2 39 40 #define U1_DEVTYPE_SP_SUPPORT 0x10 /* SP Support */ 41 #define U1_DISABLE_DEV 0x01 42 #define U1_TP_ABS_MODE 0x02 43 #define U1_SP_ABS_MODE 0x80 44 45 #define ADDRESS_U1_DEV_CTRL_1 0x00800040 46 #define ADDRESS_U1_DEVICE_TYP 0x00800043 47 #define ADDRESS_U1_NUM_SENS_X 0x00800047 48 #define ADDRESS_U1_NUM_SENS_Y 0x00800048 49 #define ADDRESS_U1_PITCH_SENS_X 0x00800049 50 #define ADDRESS_U1_PITCH_SENS_Y 0x0080004A 51 #define ADDRESS_U1_RESO_DWN_ABS 0x0080004E 52 #define ADDRESS_U1_PAD_BTN 0x00800052 53 #define ADDRESS_U1_SP_BTN 0x0080009F 54 55 #define T4_INPUT_REPORT_LEN sizeof(struct t4_input_report) 56 #define T4_FEATURE_REPORT_LEN T4_INPUT_REPORT_LEN 57 #define T4_FEATURE_REPORT_ID 7 58 #define T4_CMD_REGISTER_READ 0x08 59 #define T4_CMD_REGISTER_WRITE 0x07 60 61 #define T4_ADDRESS_BASE 0xC2C0 62 #define PRM_SYS_CONFIG_1 (T4_ADDRESS_BASE + 0x0002) 63 #define T4_PRM_FEED_CONFIG_1 (T4_ADDRESS_BASE + 0x0004) 64 #define T4_PRM_FEED_CONFIG_4 (T4_ADDRESS_BASE + 0x001A) 65 #define T4_PRM_ID_CONFIG_3 (T4_ADDRESS_BASE + 0x00B0) 66 67 68 #define T4_FEEDCFG4_ADVANCED_ABS_ENABLE 0x01 69 #define T4_I2C_ABS 0x78 70 71 #define T4_COUNT_PER_ELECTRODE 256 72 #define MAX_TOUCHES 5 73 74 enum dev_num { 75 U1, 76 T4, 77 UNKNOWN, 78 }; 79 /** 80 * struct u1_data 81 * 82 * @input: pointer to the kernel input device 83 * @input2: pointer to the kernel input2 device 84 * @hdev: pointer to the struct hid_device 85 * 86 * @dev_type: device type 87 * @max_fingers: total number of fingers 88 * @has_sp: boolean of sp existense 89 * @sp_btn_info: button information 90 * @x_active_len_mm: active area length of X (mm) 91 * @y_active_len_mm: active area length of Y (mm) 92 * @x_max: maximum x coordinate value 93 * @y_max: maximum y coordinate value 94 * @x_min: minimum x coordinate value 95 * @y_min: minimum y coordinate value 96 * @btn_cnt: number of buttons 97 * @sp_btn_cnt: number of stick buttons 98 */ 99 struct alps_dev { 100 struct input_dev *input; 101 struct input_dev *input2; 102 struct hid_device *hdev; 103 104 enum dev_num dev_type; 105 u8 max_fingers; 106 u8 has_sp; 107 u8 sp_btn_info; 108 u32 x_active_len_mm; 109 u32 y_active_len_mm; 110 u32 x_max; 111 u32 y_max; 112 u32 x_min; 113 u32 y_min; 114 u32 btn_cnt; 115 u32 sp_btn_cnt; 116 }; 117 118 struct t4_contact_data { 119 u8 palm; 120 u8 x_lo; 121 u8 x_hi; 122 u8 y_lo; 123 u8 y_hi; 124 }; 125 126 struct t4_input_report { 127 u8 reportID; 128 u8 numContacts; 129 struct t4_contact_data contact[5]; 130 u8 button; 131 u8 track[5]; 132 u8 zx[5], zy[5]; 133 u8 palmTime[5]; 134 u8 kilroy; 135 u16 timeStamp; 136 }; 137 138 static u16 t4_calc_check_sum(u8 *buffer, 139 unsigned long offset, unsigned long length) 140 { 141 u16 sum1 = 0xFF, sum2 = 0xFF; 142 unsigned long i = 0; 143 144 if (offset + length >= 50) 145 return 0; 146 147 while (length > 0) { 148 u32 tlen = length > 20 ? 20 : length; 149 150 length -= tlen; 151 152 do { 153 sum1 += buffer[offset + i]; 154 sum2 += sum1; 155 i++; 156 } while (--tlen > 0); 157 158 sum1 = (sum1 & 0xFF) + (sum1 >> 8); 159 sum2 = (sum2 & 0xFF) + (sum2 >> 8); 160 } 161 162 sum1 = (sum1 & 0xFF) + (sum1 >> 8); 163 sum2 = (sum2 & 0xFF) + (sum2 >> 8); 164 165 return(sum2 << 8 | sum1); 166 } 167 168 static int t4_read_write_register(struct hid_device *hdev, u32 address, 169 u8 *read_val, u8 write_val, bool read_flag) 170 { 171 int ret; 172 u16 check_sum; 173 u8 *input; 174 u8 *readbuf; 175 176 input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL); 177 if (!input) 178 return -ENOMEM; 179 180 input[0] = T4_FEATURE_REPORT_ID; 181 if (read_flag) { 182 input[1] = T4_CMD_REGISTER_READ; 183 input[8] = 0x00; 184 } else { 185 input[1] = T4_CMD_REGISTER_WRITE; 186 input[8] = write_val; 187 } 188 put_unaligned_le32(address, input + 2); 189 input[6] = 1; 190 input[7] = 0; 191 192 /* Calculate the checksum */ 193 check_sum = t4_calc_check_sum(input, 1, 8); 194 input[9] = (u8)check_sum; 195 input[10] = (u8)(check_sum >> 8); 196 input[11] = 0; 197 198 ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input, 199 T4_FEATURE_REPORT_LEN, 200 HID_FEATURE_REPORT, HID_REQ_SET_REPORT); 201 202 if (ret < 0) { 203 dev_err(&hdev->dev, "failed to read command (%d)\n", ret); 204 goto exit; 205 } 206 207 readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL); 208 if (read_flag) { 209 if (!readbuf) { 210 ret = -ENOMEM; 211 goto exit; 212 } 213 214 ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf, 215 T4_FEATURE_REPORT_LEN, 216 HID_FEATURE_REPORT, HID_REQ_GET_REPORT); 217 if (ret < 0) { 218 dev_err(&hdev->dev, "failed read register (%d)\n", ret); 219 goto exit_readbuf; 220 } 221 222 if (*(u32 *)&readbuf[6] != address) { 223 dev_err(&hdev->dev, "read register address error (%x,%x)\n", 224 *(u32 *)&readbuf[6], address); 225 goto exit_readbuf; 226 } 227 228 if (*(u16 *)&readbuf[10] != 1) { 229 dev_err(&hdev->dev, "read register size error (%x)\n", 230 *(u16 *)&readbuf[10]); 231 goto exit_readbuf; 232 } 233 234 check_sum = t4_calc_check_sum(readbuf, 6, 7); 235 if (*(u16 *)&readbuf[13] != check_sum) { 236 dev_err(&hdev->dev, "read register checksum error (%x,%x)\n", 237 *(u16 *)&readbuf[13], check_sum); 238 goto exit_readbuf; 239 } 240 241 *read_val = readbuf[12]; 242 } 243 244 ret = 0; 245 246 exit_readbuf: 247 kfree(readbuf); 248 exit: 249 kfree(input); 250 return ret; 251 } 252 253 static int u1_read_write_register(struct hid_device *hdev, u32 address, 254 u8 *read_val, u8 write_val, bool read_flag) 255 { 256 int ret, i; 257 u8 check_sum; 258 u8 *input; 259 u8 *readbuf; 260 261 input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL); 262 if (!input) 263 return -ENOMEM; 264 265 input[0] = U1_FEATURE_REPORT_ID; 266 if (read_flag) { 267 input[1] = U1_CMD_REGISTER_READ; 268 input[6] = 0x00; 269 } else { 270 input[1] = U1_CMD_REGISTER_WRITE; 271 input[6] = write_val; 272 } 273 274 put_unaligned_le32(address, input + 2); 275 276 /* Calculate the checksum */ 277 check_sum = U1_FEATURE_REPORT_LEN_ALL; 278 for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++) 279 check_sum += input[i]; 280 281 input[7] = check_sum; 282 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input, 283 U1_FEATURE_REPORT_LEN, 284 HID_FEATURE_REPORT, HID_REQ_SET_REPORT); 285 286 if (ret < 0) { 287 dev_err(&hdev->dev, "failed to read command (%d)\n", ret); 288 goto exit; 289 } 290 291 if (read_flag) { 292 readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL); 293 if (!readbuf) { 294 ret = -ENOMEM; 295 goto exit; 296 } 297 298 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf, 299 U1_FEATURE_REPORT_LEN, 300 HID_FEATURE_REPORT, HID_REQ_GET_REPORT); 301 302 if (ret < 0) { 303 dev_err(&hdev->dev, "failed read register (%d)\n", ret); 304 kfree(readbuf); 305 goto exit; 306 } 307 308 *read_val = readbuf[6]; 309 310 kfree(readbuf); 311 } 312 313 ret = 0; 314 315 exit: 316 kfree(input); 317 return ret; 318 } 319 320 static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size) 321 { 322 unsigned int x, y, z; 323 int i; 324 struct t4_input_report *p_report = (struct t4_input_report *)data; 325 326 if (!data) 327 return 0; 328 for (i = 0; i < hdata->max_fingers; i++) { 329 x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo; 330 y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo; 331 y = hdata->y_max - y + hdata->y_min; 332 z = (p_report->contact[i].palm < 0x80 && 333 p_report->contact[i].palm > 0) * 62; 334 if (x == 0xffff) { 335 x = 0; 336 y = 0; 337 z = 0; 338 } 339 input_mt_slot(hdata->input, i); 340 341 input_mt_report_slot_state(hdata->input, 342 MT_TOOL_FINGER, z != 0); 343 344 if (!z) 345 continue; 346 347 input_report_abs(hdata->input, ABS_MT_POSITION_X, x); 348 input_report_abs(hdata->input, ABS_MT_POSITION_Y, y); 349 input_report_abs(hdata->input, ABS_MT_PRESSURE, z); 350 } 351 input_mt_sync_frame(hdata->input); 352 353 input_report_key(hdata->input, BTN_LEFT, p_report->button); 354 355 input_sync(hdata->input); 356 return 1; 357 } 358 359 static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size) 360 { 361 unsigned int x, y, z; 362 int i; 363 short sp_x, sp_y; 364 365 if (!data) 366 return 0; 367 switch (data[0]) { 368 case U1_MOUSE_REPORT_ID: 369 break; 370 case U1_FEATURE_REPORT_ID: 371 break; 372 case U1_ABSOLUTE_REPORT_ID: 373 for (i = 0; i < hdata->max_fingers; i++) { 374 u8 *contact = &data[i * 5]; 375 376 x = get_unaligned_le16(contact + 3); 377 y = get_unaligned_le16(contact + 5); 378 z = contact[7] & 0x7F; 379 380 input_mt_slot(hdata->input, i); 381 382 if (z != 0) { 383 input_mt_report_slot_state(hdata->input, 384 MT_TOOL_FINGER, 1); 385 input_report_abs(hdata->input, 386 ABS_MT_POSITION_X, x); 387 input_report_abs(hdata->input, 388 ABS_MT_POSITION_Y, y); 389 input_report_abs(hdata->input, 390 ABS_MT_PRESSURE, z); 391 } else { 392 input_mt_report_slot_state(hdata->input, 393 MT_TOOL_FINGER, 0); 394 } 395 } 396 397 input_mt_sync_frame(hdata->input); 398 399 input_report_key(hdata->input, BTN_LEFT, 400 data[1] & 0x1); 401 input_report_key(hdata->input, BTN_RIGHT, 402 (data[1] & 0x2)); 403 input_report_key(hdata->input, BTN_MIDDLE, 404 (data[1] & 0x4)); 405 406 input_sync(hdata->input); 407 408 return 1; 409 410 case U1_SP_ABSOLUTE_REPORT_ID: 411 sp_x = get_unaligned_le16(data+2); 412 sp_y = get_unaligned_le16(data+4); 413 414 sp_x = sp_x / 8; 415 sp_y = sp_y / 8; 416 417 input_report_rel(hdata->input2, REL_X, sp_x); 418 input_report_rel(hdata->input2, REL_Y, sp_y); 419 420 input_report_key(hdata->input2, BTN_LEFT, 421 data[1] & 0x1); 422 input_report_key(hdata->input2, BTN_RIGHT, 423 (data[1] & 0x2)); 424 input_report_key(hdata->input2, BTN_MIDDLE, 425 (data[1] & 0x4)); 426 427 input_sync(hdata->input2); 428 429 return 1; 430 } 431 432 return 0; 433 } 434 435 static int alps_raw_event(struct hid_device *hdev, 436 struct hid_report *report, u8 *data, int size) 437 { 438 int ret = 0; 439 struct alps_dev *hdata = hid_get_drvdata(hdev); 440 441 switch (hdev->product) { 442 case HID_PRODUCT_ID_T4_BTNLESS: 443 ret = t4_raw_event(hdata, data, size); 444 break; 445 default: 446 ret = u1_raw_event(hdata, data, size); 447 break; 448 } 449 return ret; 450 } 451 452 static int __maybe_unused alps_post_reset(struct hid_device *hdev) 453 { 454 int ret = -1; 455 struct alps_dev *data = hid_get_drvdata(hdev); 456 457 switch (data->dev_type) { 458 case T4: 459 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1, 460 NULL, T4_I2C_ABS, false); 461 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, 462 NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false); 463 break; 464 case U1: 465 ret = u1_read_write_register(hdev, 466 ADDRESS_U1_DEV_CTRL_1, NULL, 467 U1_TP_ABS_MODE | U1_SP_ABS_MODE, false); 468 break; 469 default: 470 break; 471 } 472 return ret; 473 } 474 475 static int __maybe_unused alps_post_resume(struct hid_device *hdev) 476 { 477 return alps_post_reset(hdev); 478 } 479 480 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data) 481 { 482 int ret; 483 u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y; 484 u8 pitch_x, pitch_y, resolution; 485 486 /* Device initialization */ 487 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, 488 &dev_ctrl, 0, true); 489 if (ret < 0) { 490 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret); 491 goto exit; 492 } 493 494 dev_ctrl &= ~U1_DISABLE_DEV; 495 dev_ctrl |= U1_TP_ABS_MODE; 496 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, 497 NULL, dev_ctrl, false); 498 if (ret < 0) { 499 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret); 500 goto exit; 501 } 502 503 ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X, 504 &sen_line_num_x, 0, true); 505 if (ret < 0) { 506 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret); 507 goto exit; 508 } 509 510 ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y, 511 &sen_line_num_y, 0, true); 512 if (ret < 0) { 513 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret); 514 goto exit; 515 } 516 517 ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X, 518 &pitch_x, 0, true); 519 if (ret < 0) { 520 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret); 521 goto exit; 522 } 523 524 ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y, 525 &pitch_y, 0, true); 526 if (ret < 0) { 527 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret); 528 goto exit; 529 } 530 531 ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS, 532 &resolution, 0, true); 533 if (ret < 0) { 534 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret); 535 goto exit; 536 } 537 pri_data->x_active_len_mm = 538 (pitch_x * (sen_line_num_x - 1)) / 10; 539 pri_data->y_active_len_mm = 540 (pitch_y * (sen_line_num_y - 1)) / 10; 541 542 pri_data->x_max = 543 (resolution << 2) * (sen_line_num_x - 1); 544 pri_data->x_min = 1; 545 pri_data->y_max = 546 (resolution << 2) * (sen_line_num_y - 1); 547 pri_data->y_min = 1; 548 549 ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN, 550 &tmp, 0, true); 551 if (ret < 0) { 552 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret); 553 goto exit; 554 } 555 if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) { 556 pri_data->btn_cnt = (tmp & 0x0F); 557 } else { 558 /* Button pad */ 559 pri_data->btn_cnt = 1; 560 } 561 562 pri_data->has_sp = 0; 563 /* Check StickPointer device */ 564 ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP, 565 &tmp, 0, true); 566 if (ret < 0) { 567 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret); 568 goto exit; 569 } 570 if (tmp & U1_DEVTYPE_SP_SUPPORT) { 571 dev_ctrl |= U1_SP_ABS_MODE; 572 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, 573 NULL, dev_ctrl, false); 574 if (ret < 0) { 575 dev_err(&hdev->dev, "failed SP mode (%d)\n", ret); 576 goto exit; 577 } 578 579 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN, 580 &pri_data->sp_btn_info, 0, true); 581 if (ret < 0) { 582 dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret); 583 goto exit; 584 } 585 pri_data->has_sp = 1; 586 } 587 pri_data->max_fingers = 5; 588 exit: 589 return ret; 590 } 591 592 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data) 593 { 594 int ret; 595 u8 tmp, sen_line_num_x, sen_line_num_y; 596 597 ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true); 598 if (ret < 0) { 599 dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret); 600 goto exit; 601 } 602 sen_line_num_x = 16 + ((tmp & 0x0F) | (tmp & 0x08 ? 0xF0 : 0)); 603 sen_line_num_y = 12 + (((tmp & 0xF0) >> 4) | (tmp & 0x80 ? 0xF0 : 0)); 604 605 pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE; 606 pri_data->x_min = T4_COUNT_PER_ELECTRODE; 607 pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE; 608 pri_data->y_min = T4_COUNT_PER_ELECTRODE; 609 pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0; 610 pri_data->btn_cnt = 1; 611 612 ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true); 613 if (ret < 0) { 614 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret); 615 goto exit; 616 } 617 tmp |= 0x02; 618 ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false); 619 if (ret < 0) { 620 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret); 621 goto exit; 622 } 623 624 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1, 625 NULL, T4_I2C_ABS, false); 626 if (ret < 0) { 627 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret); 628 goto exit; 629 } 630 631 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL, 632 T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false); 633 if (ret < 0) { 634 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret); 635 goto exit; 636 } 637 pri_data->max_fingers = 5; 638 pri_data->has_sp = 0; 639 exit: 640 return ret; 641 } 642 643 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi) 644 { 645 struct alps_dev *data = hid_get_drvdata(hdev); 646 struct input_dev *input = hi->input, *input2; 647 int ret; 648 int res_x, res_y, i; 649 650 data->input = input; 651 652 hid_dbg(hdev, "Opening low level driver\n"); 653 ret = hid_hw_open(hdev); 654 if (ret) 655 return ret; 656 657 /* Allow incoming hid reports */ 658 hid_device_io_start(hdev); 659 switch (data->dev_type) { 660 case T4: 661 ret = T4_init(hdev, data); 662 break; 663 case U1: 664 ret = u1_init(hdev, data); 665 break; 666 default: 667 break; 668 } 669 670 if (ret) 671 goto exit; 672 673 __set_bit(EV_ABS, input->evbit); 674 input_set_abs_params(input, ABS_MT_POSITION_X, 675 data->x_min, data->x_max, 0, 0); 676 input_set_abs_params(input, ABS_MT_POSITION_Y, 677 data->y_min, data->y_max, 0, 0); 678 679 if (data->x_active_len_mm && data->y_active_len_mm) { 680 res_x = (data->x_max - 1) / data->x_active_len_mm; 681 res_y = (data->y_max - 1) / data->y_active_len_mm; 682 683 input_abs_set_res(input, ABS_MT_POSITION_X, res_x); 684 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y); 685 } 686 687 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0); 688 689 input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER); 690 691 __set_bit(EV_KEY, input->evbit); 692 693 if (data->btn_cnt == 1) 694 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 695 696 for (i = 0; i < data->btn_cnt; i++) 697 __set_bit(BTN_LEFT + i, input->keybit); 698 699 /* Stick device initialization */ 700 if (data->has_sp) { 701 input2 = input_allocate_device(); 702 if (!input2) { 703 input_free_device(input2); 704 goto exit; 705 } 706 707 data->input2 = input2; 708 input2->phys = input->phys; 709 input2->name = "DualPoint Stick"; 710 input2->id.bustype = BUS_I2C; 711 input2->id.vendor = input->id.vendor; 712 input2->id.product = input->id.product; 713 input2->id.version = input->id.version; 714 input2->dev.parent = input->dev.parent; 715 716 __set_bit(EV_KEY, input2->evbit); 717 data->sp_btn_cnt = (data->sp_btn_info & 0x0F); 718 for (i = 0; i < data->sp_btn_cnt; i++) 719 __set_bit(BTN_LEFT + i, input2->keybit); 720 721 __set_bit(EV_REL, input2->evbit); 722 __set_bit(REL_X, input2->relbit); 723 __set_bit(REL_Y, input2->relbit); 724 __set_bit(INPUT_PROP_POINTER, input2->propbit); 725 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit); 726 727 if (input_register_device(data->input2)) { 728 input_free_device(input2); 729 goto exit; 730 } 731 } 732 733 exit: 734 hid_device_io_stop(hdev); 735 hid_hw_close(hdev); 736 return ret; 737 } 738 739 static int alps_input_mapping(struct hid_device *hdev, 740 struct hid_input *hi, struct hid_field *field, 741 struct hid_usage *usage, unsigned long **bit, int *max) 742 { 743 return -1; 744 } 745 746 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id) 747 { 748 struct alps_dev *data = NULL; 749 int ret; 750 data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL); 751 if (!data) 752 return -ENOMEM; 753 754 data->hdev = hdev; 755 hid_set_drvdata(hdev, data); 756 757 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 758 759 ret = hid_parse(hdev); 760 if (ret) { 761 hid_err(hdev, "parse failed\n"); 762 return ret; 763 } 764 765 switch (hdev->product) { 766 case HID_DEVICE_ID_ALPS_T4_BTNLESS: 767 data->dev_type = T4; 768 break; 769 case HID_DEVICE_ID_ALPS_U1_DUAL: 770 case HID_DEVICE_ID_ALPS_U1: 771 data->dev_type = U1; 772 break; 773 default: 774 data->dev_type = UNKNOWN; 775 } 776 777 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 778 if (ret) { 779 hid_err(hdev, "hw start failed\n"); 780 return ret; 781 } 782 783 return 0; 784 } 785 786 static void alps_remove(struct hid_device *hdev) 787 { 788 hid_hw_stop(hdev); 789 } 790 791 static const struct hid_device_id alps_id[] = { 792 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, 793 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) }, 794 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, 795 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) }, 796 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, 797 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) }, 798 { } 799 }; 800 MODULE_DEVICE_TABLE(hid, alps_id); 801 802 static struct hid_driver alps_driver = { 803 .name = "hid-alps", 804 .id_table = alps_id, 805 .probe = alps_probe, 806 .remove = alps_remove, 807 .raw_event = alps_raw_event, 808 .input_mapping = alps_input_mapping, 809 .input_configured = alps_input_configured, 810 #ifdef CONFIG_PM 811 .resume = alps_post_resume, 812 .reset_resume = alps_post_reset, 813 #endif 814 }; 815 816 module_hid_driver(alps_driver); 817 818 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>"); 819 MODULE_DESCRIPTION("ALPS HID driver"); 820 MODULE_LICENSE("GPL"); 821