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 <linux/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 alps_dev 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_inactive(hdata->input); 393 } 394 } 395 396 input_mt_sync_frame(hdata->input); 397 398 input_report_key(hdata->input, BTN_LEFT, 399 data[1] & 0x1); 400 input_report_key(hdata->input, BTN_RIGHT, 401 (data[1] & 0x2)); 402 input_report_key(hdata->input, BTN_MIDDLE, 403 (data[1] & 0x4)); 404 405 input_sync(hdata->input); 406 407 return 1; 408 409 case U1_SP_ABSOLUTE_REPORT_ID: 410 if (!hdata->input2) 411 return 0; 412 sp_x = get_unaligned_le16(data+2); 413 sp_y = get_unaligned_le16(data+4); 414 415 sp_x = sp_x / 8; 416 sp_y = sp_y / 8; 417 418 input_report_rel(hdata->input2, REL_X, sp_x); 419 input_report_rel(hdata->input2, REL_Y, sp_y); 420 421 input_report_key(hdata->input2, BTN_LEFT, 422 data[1] & 0x1); 423 input_report_key(hdata->input2, BTN_RIGHT, 424 (data[1] & 0x2)); 425 input_report_key(hdata->input2, BTN_MIDDLE, 426 (data[1] & 0x4)); 427 428 input_sync(hdata->input2); 429 430 return 1; 431 } 432 433 return 0; 434 } 435 436 static int alps_raw_event(struct hid_device *hdev, 437 struct hid_report *report, u8 *data, int size) 438 { 439 int ret = 0; 440 struct alps_dev *hdata = hid_get_drvdata(hdev); 441 442 if (!(hdev->claimed & HID_CLAIMED_INPUT) || !hdata->input) 443 return 0; 444 445 switch (hdev->product) { 446 case HID_PRODUCT_ID_T4_BTNLESS: 447 ret = t4_raw_event(hdata, data, size); 448 break; 449 default: 450 ret = u1_raw_event(hdata, data, size); 451 break; 452 } 453 return ret; 454 } 455 456 static int __maybe_unused alps_post_reset(struct hid_device *hdev) 457 { 458 int ret = -1; 459 struct alps_dev *data = hid_get_drvdata(hdev); 460 461 switch (data->dev_type) { 462 case T4: 463 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1, 464 NULL, T4_I2C_ABS, false); 465 if (ret < 0) { 466 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", 467 ret); 468 goto exit; 469 } 470 471 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, 472 NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false); 473 if (ret < 0) { 474 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", 475 ret); 476 goto exit; 477 } 478 break; 479 case U1: 480 ret = u1_read_write_register(hdev, 481 ADDRESS_U1_DEV_CTRL_1, NULL, 482 U1_TP_ABS_MODE | U1_SP_ABS_MODE, false); 483 if (ret < 0) { 484 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", 485 ret); 486 goto exit; 487 } 488 break; 489 default: 490 break; 491 } 492 493 exit: 494 return ret; 495 } 496 497 static int __maybe_unused alps_post_resume(struct hid_device *hdev) 498 { 499 return alps_post_reset(hdev); 500 } 501 502 static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data) 503 { 504 int ret; 505 u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y; 506 u8 pitch_x, pitch_y, resolution; 507 508 /* Device initialization */ 509 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, 510 &dev_ctrl, 0, true); 511 if (ret < 0) { 512 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret); 513 goto exit; 514 } 515 516 dev_ctrl &= ~U1_DISABLE_DEV; 517 dev_ctrl |= U1_TP_ABS_MODE; 518 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, 519 NULL, dev_ctrl, false); 520 if (ret < 0) { 521 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret); 522 goto exit; 523 } 524 525 ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X, 526 &sen_line_num_x, 0, true); 527 if (ret < 0) { 528 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret); 529 goto exit; 530 } 531 532 ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y, 533 &sen_line_num_y, 0, true); 534 if (ret < 0) { 535 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret); 536 goto exit; 537 } 538 539 ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X, 540 &pitch_x, 0, true); 541 if (ret < 0) { 542 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret); 543 goto exit; 544 } 545 546 ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y, 547 &pitch_y, 0, true); 548 if (ret < 0) { 549 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret); 550 goto exit; 551 } 552 553 ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS, 554 &resolution, 0, true); 555 if (ret < 0) { 556 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret); 557 goto exit; 558 } 559 pri_data->x_active_len_mm = 560 (pitch_x * (sen_line_num_x - 1)) / 10; 561 pri_data->y_active_len_mm = 562 (pitch_y * (sen_line_num_y - 1)) / 10; 563 564 pri_data->x_max = 565 (resolution << 2) * (sen_line_num_x - 1); 566 pri_data->x_min = 1; 567 pri_data->y_max = 568 (resolution << 2) * (sen_line_num_y - 1); 569 pri_data->y_min = 1; 570 571 ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN, 572 &tmp, 0, true); 573 if (ret < 0) { 574 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret); 575 goto exit; 576 } 577 if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) { 578 pri_data->btn_cnt = (tmp & 0x0F); 579 } else { 580 /* Button pad */ 581 pri_data->btn_cnt = 1; 582 } 583 584 pri_data->has_sp = 0; 585 /* Check StickPointer device */ 586 ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP, 587 &tmp, 0, true); 588 if (ret < 0) { 589 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret); 590 goto exit; 591 } 592 if (tmp & U1_DEVTYPE_SP_SUPPORT) { 593 dev_ctrl |= U1_SP_ABS_MODE; 594 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1, 595 NULL, dev_ctrl, false); 596 if (ret < 0) { 597 dev_err(&hdev->dev, "failed SP mode (%d)\n", ret); 598 goto exit; 599 } 600 601 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN, 602 &pri_data->sp_btn_info, 0, true); 603 if (ret < 0) { 604 dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret); 605 goto exit; 606 } 607 pri_data->has_sp = 1; 608 } 609 pri_data->max_fingers = 5; 610 exit: 611 return ret; 612 } 613 614 static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data) 615 { 616 int ret; 617 u8 tmp, sen_line_num_x, sen_line_num_y; 618 619 ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true); 620 if (ret < 0) { 621 dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret); 622 goto exit; 623 } 624 sen_line_num_x = 16 + ((tmp & 0x0F) | (tmp & 0x08 ? 0xF0 : 0)); 625 sen_line_num_y = 12 + (((tmp & 0xF0) >> 4) | (tmp & 0x80 ? 0xF0 : 0)); 626 627 pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE; 628 pri_data->x_min = T4_COUNT_PER_ELECTRODE; 629 pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE; 630 pri_data->y_min = T4_COUNT_PER_ELECTRODE; 631 pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0; 632 pri_data->btn_cnt = 1; 633 634 ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true); 635 if (ret < 0) { 636 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret); 637 goto exit; 638 } 639 tmp |= 0x02; 640 ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false); 641 if (ret < 0) { 642 dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret); 643 goto exit; 644 } 645 646 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1, 647 NULL, T4_I2C_ABS, false); 648 if (ret < 0) { 649 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret); 650 goto exit; 651 } 652 653 ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL, 654 T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false); 655 if (ret < 0) { 656 dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret); 657 goto exit; 658 } 659 pri_data->max_fingers = 5; 660 pri_data->has_sp = 0; 661 exit: 662 return ret; 663 } 664 665 static int alps_sp_open(struct input_dev *dev) 666 { 667 struct hid_device *hid = input_get_drvdata(dev); 668 669 return hid_hw_open(hid); 670 } 671 672 static void alps_sp_close(struct input_dev *dev) 673 { 674 struct hid_device *hid = input_get_drvdata(dev); 675 676 hid_hw_close(hid); 677 } 678 679 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi) 680 { 681 struct alps_dev *data = hid_get_drvdata(hdev); 682 struct input_dev *input = hi->input, *input2; 683 int ret; 684 int res_x, res_y, i; 685 686 data->input = input; 687 688 hid_dbg(hdev, "Opening low level driver\n"); 689 ret = hid_hw_open(hdev); 690 if (ret) 691 return ret; 692 693 /* Allow incoming hid reports */ 694 hid_device_io_start(hdev); 695 switch (data->dev_type) { 696 case T4: 697 ret = T4_init(hdev, data); 698 break; 699 case U1: 700 ret = u1_init(hdev, data); 701 break; 702 default: 703 break; 704 } 705 706 if (ret) 707 goto exit; 708 709 __set_bit(EV_ABS, input->evbit); 710 input_set_abs_params(input, ABS_MT_POSITION_X, 711 data->x_min, data->x_max, 0, 0); 712 input_set_abs_params(input, ABS_MT_POSITION_Y, 713 data->y_min, data->y_max, 0, 0); 714 715 if (data->x_active_len_mm && data->y_active_len_mm) { 716 res_x = (data->x_max - 1) / data->x_active_len_mm; 717 res_y = (data->y_max - 1) / data->y_active_len_mm; 718 719 input_abs_set_res(input, ABS_MT_POSITION_X, res_x); 720 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y); 721 } 722 723 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0); 724 725 input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER); 726 727 __set_bit(EV_KEY, input->evbit); 728 729 if (data->btn_cnt == 1) 730 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 731 732 for (i = 0; i < data->btn_cnt; i++) 733 __set_bit(BTN_LEFT + i, input->keybit); 734 735 /* Stick device initialization */ 736 if (data->has_sp) { 737 input2 = input_allocate_device(); 738 if (!input2) { 739 ret = -ENOMEM; 740 goto exit; 741 } 742 743 input2->phys = input->phys; 744 input2->name = "DualPoint Stick"; 745 input2->id.bustype = BUS_I2C; 746 input2->id.vendor = input->id.vendor; 747 input2->id.product = input->id.product; 748 input2->id.version = input->id.version; 749 input2->dev.parent = input->dev.parent; 750 751 input_set_drvdata(input2, hdev); 752 input2->open = alps_sp_open; 753 input2->close = alps_sp_close; 754 755 __set_bit(EV_KEY, input2->evbit); 756 data->sp_btn_cnt = (data->sp_btn_info & 0x0F); 757 for (i = 0; i < data->sp_btn_cnt; i++) 758 __set_bit(BTN_LEFT + i, input2->keybit); 759 760 __set_bit(EV_REL, input2->evbit); 761 __set_bit(REL_X, input2->relbit); 762 __set_bit(REL_Y, input2->relbit); 763 __set_bit(INPUT_PROP_POINTER, input2->propbit); 764 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit); 765 766 if (input_register_device(input2)) { 767 input_free_device(input2); 768 ret = -ENOENT; 769 goto exit; 770 } 771 data->input2 = input2; 772 } 773 774 exit: 775 hid_device_io_stop(hdev); 776 hid_hw_close(hdev); 777 return ret; 778 } 779 780 static int alps_input_mapping(struct hid_device *hdev, 781 struct hid_input *hi, struct hid_field *field, 782 struct hid_usage *usage, unsigned long **bit, int *max) 783 { 784 return -1; 785 } 786 787 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id) 788 { 789 struct alps_dev *data = NULL; 790 int ret; 791 data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL); 792 if (!data) 793 return -ENOMEM; 794 795 data->hdev = hdev; 796 hid_set_drvdata(hdev, data); 797 798 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 799 800 ret = hid_parse(hdev); 801 if (ret) { 802 hid_err(hdev, "parse failed\n"); 803 return ret; 804 } 805 806 switch (hdev->product) { 807 case HID_DEVICE_ID_ALPS_T4_BTNLESS: 808 data->dev_type = T4; 809 break; 810 case HID_DEVICE_ID_ALPS_U1_DUAL: 811 case HID_DEVICE_ID_ALPS_U1: 812 case HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY: 813 data->dev_type = U1; 814 break; 815 default: 816 data->dev_type = UNKNOWN; 817 } 818 819 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 820 if (ret) { 821 hid_err(hdev, "hw start failed\n"); 822 return ret; 823 } 824 825 return 0; 826 } 827 828 static void alps_remove(struct hid_device *hdev) 829 { 830 struct alps_dev *data = hid_get_drvdata(hdev); 831 832 /* 833 * input2 ("DualPoint Stick") is allocated separately and is not 834 * tracked in hdev->inputs, so the default remove path 835 * (hid_hw_stop -> hidinput_disconnect) does not unregister it. 836 * 837 * Stop the device first so that no URB callback can touch input2 838 * while it is being unregistered, then drop it explicitly. 839 */ 840 hid_hw_stop(hdev); 841 842 if (data->input2) 843 input_unregister_device(data->input2); 844 } 845 846 static const struct hid_device_id alps_id[] = { 847 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, 848 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) }, 849 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, 850 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) }, 851 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, 852 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY) }, 853 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, 854 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) }, 855 { } 856 }; 857 MODULE_DEVICE_TABLE(hid, alps_id); 858 859 static struct hid_driver alps_driver = { 860 .name = "hid-alps", 861 .id_table = alps_id, 862 .probe = alps_probe, 863 .raw_event = alps_raw_event, 864 .input_mapping = alps_input_mapping, 865 .input_configured = alps_input_configured, 866 .resume = pm_ptr(alps_post_resume), 867 .reset_resume = pm_ptr(alps_post_reset), 868 .remove = alps_remove, 869 }; 870 871 module_hid_driver(alps_driver); 872 873 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>"); 874 MODULE_DESCRIPTION("ALPS HID driver"); 875 MODULE_LICENSE("GPL"); 876