1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for Goodix Touchscreens 4 * 5 * Copyright (c) 2014 Red Hat Inc. 6 * Copyright (c) 2015 K. Merker <merker@debian.org> 7 * 8 * This code is based on gt9xx.c authored by andrew@goodix.com: 9 * 10 * 2010 - 2012 Goodix Technology. 11 */ 12 13 14 #include <linux/kernel.h> 15 #include <linux/dmi.h> 16 #include <linux/firmware.h> 17 #include <linux/module.h> 18 #include <linux/delay.h> 19 #include <linux/irq.h> 20 #include <linux/interrupt.h> 21 #include <linux/slab.h> 22 #include <linux/acpi.h> 23 #include <linux/of.h> 24 #include <asm/unaligned.h> 25 #include "goodix.h" 26 27 #define GOODIX_GPIO_INT_NAME "irq" 28 #define GOODIX_GPIO_RST_NAME "reset" 29 30 #define GOODIX_MAX_HEIGHT 4096 31 #define GOODIX_MAX_WIDTH 4096 32 #define GOODIX_INT_TRIGGER 1 33 #define GOODIX_CONTACT_SIZE 8 34 #define GOODIX_MAX_CONTACT_SIZE 9 35 #define GOODIX_MAX_CONTACTS 10 36 37 #define GOODIX_CONFIG_MIN_LENGTH 186 38 #define GOODIX_CONFIG_911_LENGTH 186 39 #define GOODIX_CONFIG_967_LENGTH 228 40 #define GOODIX_CONFIG_GT9X_LENGTH 240 41 42 #define GOODIX_BUFFER_STATUS_READY BIT(7) 43 #define GOODIX_HAVE_KEY BIT(4) 44 #define GOODIX_BUFFER_STATUS_TIMEOUT 20 45 46 #define RESOLUTION_LOC 1 47 #define MAX_CONTACTS_LOC 5 48 #define TRIGGER_LOC 6 49 50 /* Our special handling for GPIO accesses through ACPI is x86 specific */ 51 #if defined CONFIG_X86 && defined CONFIG_ACPI 52 #define ACPI_GPIO_SUPPORT 53 #endif 54 55 struct goodix_chip_id { 56 const char *id; 57 const struct goodix_chip_data *data; 58 }; 59 60 static int goodix_check_cfg_8(struct goodix_ts_data *ts, 61 const u8 *cfg, int len); 62 static int goodix_check_cfg_16(struct goodix_ts_data *ts, 63 const u8 *cfg, int len); 64 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 65 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 66 67 static const struct goodix_chip_data gt1x_chip_data = { 68 .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 69 .config_len = GOODIX_CONFIG_GT9X_LENGTH, 70 .check_config = goodix_check_cfg_16, 71 .calc_config_checksum = goodix_calc_cfg_checksum_16, 72 }; 73 74 static const struct goodix_chip_data gt911_chip_data = { 75 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 76 .config_len = GOODIX_CONFIG_911_LENGTH, 77 .check_config = goodix_check_cfg_8, 78 .calc_config_checksum = goodix_calc_cfg_checksum_8, 79 }; 80 81 static const struct goodix_chip_data gt967_chip_data = { 82 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 83 .config_len = GOODIX_CONFIG_967_LENGTH, 84 .check_config = goodix_check_cfg_8, 85 .calc_config_checksum = goodix_calc_cfg_checksum_8, 86 }; 87 88 static const struct goodix_chip_data gt9x_chip_data = { 89 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 90 .config_len = GOODIX_CONFIG_GT9X_LENGTH, 91 .check_config = goodix_check_cfg_8, 92 .calc_config_checksum = goodix_calc_cfg_checksum_8, 93 }; 94 95 static const struct goodix_chip_id goodix_chip_ids[] = { 96 { .id = "1151", .data = >1x_chip_data }, 97 { .id = "5663", .data = >1x_chip_data }, 98 { .id = "5688", .data = >1x_chip_data }, 99 { .id = "917S", .data = >1x_chip_data }, 100 { .id = "9286", .data = >1x_chip_data }, 101 102 { .id = "911", .data = >911_chip_data }, 103 { .id = "9271", .data = >911_chip_data }, 104 { .id = "9110", .data = >911_chip_data }, 105 { .id = "927", .data = >911_chip_data }, 106 { .id = "928", .data = >911_chip_data }, 107 108 { .id = "912", .data = >967_chip_data }, 109 { .id = "9147", .data = >967_chip_data }, 110 { .id = "967", .data = >967_chip_data }, 111 { } 112 }; 113 114 static const unsigned long goodix_irq_flags[] = { 115 IRQ_TYPE_EDGE_RISING, 116 IRQ_TYPE_EDGE_FALLING, 117 IRQ_TYPE_LEVEL_LOW, 118 IRQ_TYPE_LEVEL_HIGH, 119 }; 120 121 /* 122 * Those tablets have their coordinates origin at the bottom right 123 * of the tablet, as if rotated 180 degrees 124 */ 125 static const struct dmi_system_id rotated_screen[] = { 126 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 127 { 128 .ident = "Teclast X89", 129 .matches = { 130 /* tPAD is too generic, also match on bios date */ 131 DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 132 DMI_MATCH(DMI_BOARD_NAME, "tPAD"), 133 DMI_MATCH(DMI_BIOS_DATE, "12/19/2014"), 134 }, 135 }, 136 { 137 .ident = "Teclast X98 Pro", 138 .matches = { 139 /* 140 * Only match BIOS date, because the manufacturers 141 * BIOS does not report the board name at all 142 * (sometimes)... 143 */ 144 DMI_MATCH(DMI_BOARD_VENDOR, "TECLAST"), 145 DMI_MATCH(DMI_BIOS_DATE, "10/28/2015"), 146 }, 147 }, 148 { 149 .ident = "WinBook TW100", 150 .matches = { 151 DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 152 DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 153 } 154 }, 155 { 156 .ident = "WinBook TW700", 157 .matches = { 158 DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 159 DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 160 }, 161 }, 162 #endif 163 {} 164 }; 165 166 static const struct dmi_system_id nine_bytes_report[] = { 167 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 168 { 169 .ident = "Lenovo YogaBook", 170 /* YB1-X91L/F and YB1-X90L/F */ 171 .matches = { 172 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 173 } 174 }, 175 #endif 176 {} 177 }; 178 179 /* 180 * Those tablets have their x coordinate inverted 181 */ 182 static const struct dmi_system_id inverted_x_screen[] = { 183 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 184 { 185 .ident = "Cube I15-TC", 186 .matches = { 187 DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 188 DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 189 }, 190 }, 191 #endif 192 {} 193 }; 194 195 /** 196 * goodix_i2c_read - read data from a register of the i2c slave device. 197 * 198 * @client: i2c device. 199 * @reg: the register to read from. 200 * @buf: raw write data buffer. 201 * @len: length of the buffer to write 202 */ 203 int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len) 204 { 205 struct i2c_msg msgs[2]; 206 __be16 wbuf = cpu_to_be16(reg); 207 int ret; 208 209 msgs[0].flags = 0; 210 msgs[0].addr = client->addr; 211 msgs[0].len = 2; 212 msgs[0].buf = (u8 *)&wbuf; 213 214 msgs[1].flags = I2C_M_RD; 215 msgs[1].addr = client->addr; 216 msgs[1].len = len; 217 msgs[1].buf = buf; 218 219 ret = i2c_transfer(client->adapter, msgs, 2); 220 if (ret >= 0) 221 ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO); 222 223 if (ret) 224 dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n", 225 len, reg, ret); 226 return ret; 227 } 228 229 /** 230 * goodix_i2c_write - write data to a register of the i2c slave device. 231 * 232 * @client: i2c device. 233 * @reg: the register to write to. 234 * @buf: raw data buffer to write. 235 * @len: length of the buffer to write 236 */ 237 int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len) 238 { 239 u8 *addr_buf; 240 struct i2c_msg msg; 241 int ret; 242 243 addr_buf = kmalloc(len + 2, GFP_KERNEL); 244 if (!addr_buf) 245 return -ENOMEM; 246 247 addr_buf[0] = reg >> 8; 248 addr_buf[1] = reg & 0xFF; 249 memcpy(&addr_buf[2], buf, len); 250 251 msg.flags = 0; 252 msg.addr = client->addr; 253 msg.buf = addr_buf; 254 msg.len = len + 2; 255 256 ret = i2c_transfer(client->adapter, &msg, 1); 257 if (ret >= 0) 258 ret = (ret == 1 ? 0 : -EIO); 259 260 kfree(addr_buf); 261 262 if (ret) 263 dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n", 264 len, reg, ret); 265 return ret; 266 } 267 268 int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 269 { 270 return goodix_i2c_write(client, reg, &value, sizeof(value)); 271 } 272 273 static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 274 { 275 unsigned int i; 276 277 for (i = 0; goodix_chip_ids[i].id; i++) { 278 if (!strcmp(goodix_chip_ids[i].id, id)) 279 return goodix_chip_ids[i].data; 280 } 281 282 return >9x_chip_data; 283 } 284 285 static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 286 { 287 unsigned long max_timeout; 288 int touch_num; 289 int error; 290 u16 addr = GOODIX_READ_COOR_ADDR; 291 /* 292 * We are going to read 1-byte header, 293 * ts->contact_size * max(1, touch_num) bytes of coordinates 294 * and 1-byte footer which contains the touch-key code. 295 */ 296 const int header_contact_keycode_size = 1 + ts->contact_size + 1; 297 298 /* 299 * The 'buffer status' bit, which indicates that the data is valid, is 300 * not set as soon as the interrupt is raised, but slightly after. 301 * This takes around 10 ms to happen, so we poll for 20 ms. 302 */ 303 max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 304 do { 305 error = goodix_i2c_read(ts->client, addr, data, 306 header_contact_keycode_size); 307 if (error) 308 return error; 309 310 if (data[0] & GOODIX_BUFFER_STATUS_READY) { 311 touch_num = data[0] & 0x0f; 312 if (touch_num > ts->max_touch_num) 313 return -EPROTO; 314 315 if (touch_num > 1) { 316 addr += header_contact_keycode_size; 317 data += header_contact_keycode_size; 318 error = goodix_i2c_read(ts->client, 319 addr, data, 320 ts->contact_size * 321 (touch_num - 1)); 322 if (error) 323 return error; 324 } 325 326 return touch_num; 327 } 328 329 usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 330 } while (time_before(jiffies, max_timeout)); 331 332 /* 333 * The Goodix panel will send spurious interrupts after a 334 * 'finger up' event, which will always cause a timeout. 335 */ 336 return -ENOMSG; 337 } 338 339 static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 340 { 341 int id = coor_data[0] & 0x0F; 342 int input_x = get_unaligned_le16(&coor_data[1]); 343 int input_y = get_unaligned_le16(&coor_data[3]); 344 int input_w = get_unaligned_le16(&coor_data[5]); 345 346 input_mt_slot(ts->input_dev, id); 347 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 348 touchscreen_report_pos(ts->input_dev, &ts->prop, 349 input_x, input_y, true); 350 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 351 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 352 } 353 354 static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 355 { 356 int id = coor_data[1] & 0x0F; 357 int input_x = get_unaligned_le16(&coor_data[3]); 358 int input_y = get_unaligned_le16(&coor_data[5]); 359 int input_w = get_unaligned_le16(&coor_data[7]); 360 361 input_mt_slot(ts->input_dev, id); 362 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 363 touchscreen_report_pos(ts->input_dev, &ts->prop, 364 input_x, input_y, true); 365 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 366 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 367 } 368 369 static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 370 { 371 int touch_num; 372 u8 key_value; 373 int i; 374 375 if (data[0] & GOODIX_HAVE_KEY) { 376 touch_num = data[0] & 0x0f; 377 key_value = data[1 + ts->contact_size * touch_num]; 378 for (i = 0; i < GOODIX_MAX_KEYS; i++) 379 if (key_value & BIT(i)) 380 input_report_key(ts->input_dev, 381 ts->keymap[i], 1); 382 } else { 383 for (i = 0; i < GOODIX_MAX_KEYS; i++) 384 input_report_key(ts->input_dev, ts->keymap[i], 0); 385 } 386 } 387 388 /** 389 * goodix_process_events - Process incoming events 390 * 391 * @ts: our goodix_ts_data pointer 392 * 393 * Called when the IRQ is triggered. Read the current device state, and push 394 * the input events to the user space. 395 */ 396 static void goodix_process_events(struct goodix_ts_data *ts) 397 { 398 u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 399 int touch_num; 400 int i; 401 402 touch_num = goodix_ts_read_input_report(ts, point_data); 403 if (touch_num < 0) 404 return; 405 406 goodix_ts_report_key(ts, point_data); 407 408 for (i = 0; i < touch_num; i++) 409 if (ts->contact_size == 9) 410 goodix_ts_report_touch_9b(ts, 411 &point_data[1 + ts->contact_size * i]); 412 else 413 goodix_ts_report_touch_8b(ts, 414 &point_data[1 + ts->contact_size * i]); 415 416 input_mt_sync_frame(ts->input_dev); 417 input_sync(ts->input_dev); 418 } 419 420 /** 421 * goodix_ts_irq_handler - The IRQ handler 422 * 423 * @irq: interrupt number. 424 * @dev_id: private data pointer. 425 */ 426 static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 427 { 428 struct goodix_ts_data *ts = dev_id; 429 430 goodix_process_events(ts); 431 goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); 432 433 return IRQ_HANDLED; 434 } 435 436 static void goodix_free_irq(struct goodix_ts_data *ts) 437 { 438 devm_free_irq(&ts->client->dev, ts->client->irq, ts); 439 } 440 441 static int goodix_request_irq(struct goodix_ts_data *ts) 442 { 443 return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 444 NULL, goodix_ts_irq_handler, 445 ts->irq_flags, ts->client->name, ts); 446 } 447 448 static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 449 { 450 int i, raw_cfg_len = len - 2; 451 u8 check_sum = 0; 452 453 for (i = 0; i < raw_cfg_len; i++) 454 check_sum += cfg[i]; 455 check_sum = (~check_sum) + 1; 456 if (check_sum != cfg[raw_cfg_len]) { 457 dev_err(&ts->client->dev, 458 "The checksum of the config fw is not correct"); 459 return -EINVAL; 460 } 461 462 if (cfg[raw_cfg_len + 1] != 1) { 463 dev_err(&ts->client->dev, 464 "Config fw must have Config_Fresh register set"); 465 return -EINVAL; 466 } 467 468 return 0; 469 } 470 471 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 472 { 473 int i, raw_cfg_len = ts->chip->config_len - 2; 474 u8 check_sum = 0; 475 476 for (i = 0; i < raw_cfg_len; i++) 477 check_sum += ts->config[i]; 478 check_sum = (~check_sum) + 1; 479 480 ts->config[raw_cfg_len] = check_sum; 481 ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 482 } 483 484 static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 485 int len) 486 { 487 int i, raw_cfg_len = len - 3; 488 u16 check_sum = 0; 489 490 for (i = 0; i < raw_cfg_len; i += 2) 491 check_sum += get_unaligned_be16(&cfg[i]); 492 check_sum = (~check_sum) + 1; 493 if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 494 dev_err(&ts->client->dev, 495 "The checksum of the config fw is not correct"); 496 return -EINVAL; 497 } 498 499 if (cfg[raw_cfg_len + 2] != 1) { 500 dev_err(&ts->client->dev, 501 "Config fw must have Config_Fresh register set"); 502 return -EINVAL; 503 } 504 505 return 0; 506 } 507 508 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 509 { 510 int i, raw_cfg_len = ts->chip->config_len - 3; 511 u16 check_sum = 0; 512 513 for (i = 0; i < raw_cfg_len; i += 2) 514 check_sum += get_unaligned_be16(&ts->config[i]); 515 check_sum = (~check_sum) + 1; 516 517 put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 518 ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 519 } 520 521 /** 522 * goodix_check_cfg - Checks if config fw is valid 523 * 524 * @ts: goodix_ts_data pointer 525 * @cfg: firmware config data 526 * @len: config data length 527 */ 528 static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 529 { 530 if (len < GOODIX_CONFIG_MIN_LENGTH || 531 len > GOODIX_CONFIG_MAX_LENGTH) { 532 dev_err(&ts->client->dev, 533 "The length of the config fw is not correct"); 534 return -EINVAL; 535 } 536 537 return ts->chip->check_config(ts, cfg, len); 538 } 539 540 /** 541 * goodix_send_cfg - Write fw config to device 542 * 543 * @ts: goodix_ts_data pointer 544 * @cfg: config firmware to write to device 545 * @len: config data length 546 */ 547 int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 548 { 549 int error; 550 551 error = goodix_check_cfg(ts, cfg, len); 552 if (error) 553 return error; 554 555 error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 556 if (error) 557 return error; 558 559 dev_dbg(&ts->client->dev, "Config sent successfully."); 560 561 /* Let the firmware reconfigure itself, so sleep for 10ms */ 562 usleep_range(10000, 11000); 563 564 return 0; 565 } 566 567 #ifdef ACPI_GPIO_SUPPORT 568 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 569 { 570 acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 571 acpi_status status; 572 573 status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 574 return ACPI_SUCCESS(status) ? 0 : -EIO; 575 } 576 577 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 578 { 579 acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 580 acpi_status status; 581 582 status = acpi_execute_simple_method(handle, "INTO", value); 583 return ACPI_SUCCESS(status) ? 0 : -EIO; 584 } 585 #else 586 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 587 { 588 dev_err(&ts->client->dev, 589 "%s called on device without ACPI support\n", __func__); 590 return -EINVAL; 591 } 592 593 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 594 { 595 dev_err(&ts->client->dev, 596 "%s called on device without ACPI support\n", __func__); 597 return -EINVAL; 598 } 599 #endif 600 601 static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 602 { 603 switch (ts->irq_pin_access_method) { 604 case IRQ_PIN_ACCESS_NONE: 605 dev_err(&ts->client->dev, 606 "%s called without an irq_pin_access_method set\n", 607 __func__); 608 return -EINVAL; 609 case IRQ_PIN_ACCESS_GPIO: 610 return gpiod_direction_output(ts->gpiod_int, value); 611 case IRQ_PIN_ACCESS_ACPI_GPIO: 612 /* 613 * The IRQ pin triggers on a falling edge, so its gets marked 614 * as active-low, use output_raw to avoid the value inversion. 615 */ 616 return gpiod_direction_output_raw(ts->gpiod_int, value); 617 case IRQ_PIN_ACCESS_ACPI_METHOD: 618 return goodix_pin_acpi_output_method(ts, value); 619 } 620 621 return -EINVAL; /* Never reached */ 622 } 623 624 static int goodix_irq_direction_input(struct goodix_ts_data *ts) 625 { 626 switch (ts->irq_pin_access_method) { 627 case IRQ_PIN_ACCESS_NONE: 628 dev_err(&ts->client->dev, 629 "%s called without an irq_pin_access_method set\n", 630 __func__); 631 return -EINVAL; 632 case IRQ_PIN_ACCESS_GPIO: 633 return gpiod_direction_input(ts->gpiod_int); 634 case IRQ_PIN_ACCESS_ACPI_GPIO: 635 return gpiod_direction_input(ts->gpiod_int); 636 case IRQ_PIN_ACCESS_ACPI_METHOD: 637 return goodix_pin_acpi_direction_input(ts); 638 } 639 640 return -EINVAL; /* Never reached */ 641 } 642 643 int goodix_int_sync(struct goodix_ts_data *ts) 644 { 645 int error; 646 647 error = goodix_irq_direction_output(ts, 0); 648 if (error) 649 goto error; 650 651 msleep(50); /* T5: 50ms */ 652 653 error = goodix_irq_direction_input(ts); 654 if (error) 655 goto error; 656 657 return 0; 658 659 error: 660 dev_err(&ts->client->dev, "Controller irq sync failed.\n"); 661 return error; 662 } 663 664 /** 665 * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode 666 * 667 * @ts: goodix_ts_data pointer 668 */ 669 int goodix_reset_no_int_sync(struct goodix_ts_data *ts) 670 { 671 int error; 672 673 /* begin select I2C slave addr */ 674 error = gpiod_direction_output(ts->gpiod_rst, 0); 675 if (error) 676 goto error; 677 678 msleep(20); /* T2: > 10ms */ 679 680 /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 681 error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 682 if (error) 683 goto error; 684 685 usleep_range(100, 2000); /* T3: > 100us */ 686 687 error = gpiod_direction_output(ts->gpiod_rst, 1); 688 if (error) 689 goto error; 690 691 usleep_range(6000, 10000); /* T4: > 5ms */ 692 693 /* end select I2C slave addr */ 694 error = gpiod_direction_input(ts->gpiod_rst); 695 if (error) 696 goto error; 697 698 return 0; 699 700 error: 701 dev_err(&ts->client->dev, "Controller reset failed.\n"); 702 return error; 703 } 704 705 /** 706 * goodix_reset - Reset device during power on 707 * 708 * @ts: goodix_ts_data pointer 709 */ 710 static int goodix_reset(struct goodix_ts_data *ts) 711 { 712 int error; 713 714 error = goodix_reset_no_int_sync(ts); 715 if (error) 716 return error; 717 718 return goodix_int_sync(ts); 719 } 720 721 #ifdef ACPI_GPIO_SUPPORT 722 #include <asm/cpu_device_id.h> 723 #include <asm/intel-family.h> 724 725 static const struct x86_cpu_id baytrail_cpu_ids[] = { 726 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 727 {} 728 }; 729 730 static inline bool is_byt(void) 731 { 732 const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 733 734 return !!id; 735 } 736 737 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 738 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 739 740 static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 741 { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 742 { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 743 { }, 744 }; 745 746 static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 747 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 748 { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 749 { }, 750 }; 751 752 static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 753 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 754 { }, 755 }; 756 757 static int goodix_resource(struct acpi_resource *ares, void *data) 758 { 759 struct goodix_ts_data *ts = data; 760 struct device *dev = &ts->client->dev; 761 struct acpi_resource_gpio *gpio; 762 763 switch (ares->type) { 764 case ACPI_RESOURCE_TYPE_GPIO: 765 gpio = &ares->data.gpio; 766 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 767 if (ts->gpio_int_idx == -1) { 768 ts->gpio_int_idx = ts->gpio_count; 769 } else { 770 dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 771 ts->gpio_int_idx = -2; 772 } 773 } 774 ts->gpio_count++; 775 break; 776 default: 777 break; 778 } 779 780 return 0; 781 } 782 783 /* 784 * This function gets called in case we fail to get the irq GPIO directly 785 * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 786 * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 787 * In that case we add our own mapping and then goodix_get_gpio_config() 788 * retries to get the GPIOs based on the added mapping. 789 */ 790 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 791 { 792 const struct acpi_gpio_mapping *gpio_mapping = NULL; 793 struct device *dev = &ts->client->dev; 794 LIST_HEAD(resources); 795 int ret; 796 797 ts->gpio_count = 0; 798 ts->gpio_int_idx = -1; 799 ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 800 goodix_resource, ts); 801 if (ret < 0) { 802 dev_err(dev, "Error getting ACPI resources: %d\n", ret); 803 return ret; 804 } 805 806 acpi_dev_free_resource_list(&resources); 807 808 if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 809 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 810 gpio_mapping = acpi_goodix_int_first_gpios; 811 } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 812 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 813 gpio_mapping = acpi_goodix_int_last_gpios; 814 } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 815 acpi_has_method(ACPI_HANDLE(dev), "INTI") && 816 acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 817 dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 818 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 819 gpio_mapping = acpi_goodix_reset_only_gpios; 820 } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 821 dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 822 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 823 gpio_mapping = acpi_goodix_int_last_gpios; 824 } else { 825 dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 826 ts->gpio_count, ts->gpio_int_idx); 827 return -EINVAL; 828 } 829 830 return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 831 } 832 #else 833 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 834 { 835 return -EINVAL; 836 } 837 #endif /* CONFIG_X86 && CONFIG_ACPI */ 838 839 /** 840 * goodix_get_gpio_config - Get GPIO config from ACPI/DT 841 * 842 * @ts: goodix_ts_data pointer 843 */ 844 static int goodix_get_gpio_config(struct goodix_ts_data *ts) 845 { 846 int error; 847 struct device *dev; 848 struct gpio_desc *gpiod; 849 bool added_acpi_mappings = false; 850 851 if (!ts->client) 852 return -EINVAL; 853 dev = &ts->client->dev; 854 855 ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 856 if (IS_ERR(ts->avdd28)) { 857 error = PTR_ERR(ts->avdd28); 858 if (error != -EPROBE_DEFER) 859 dev_err(dev, 860 "Failed to get AVDD28 regulator: %d\n", error); 861 return error; 862 } 863 864 ts->vddio = devm_regulator_get(dev, "VDDIO"); 865 if (IS_ERR(ts->vddio)) { 866 error = PTR_ERR(ts->vddio); 867 if (error != -EPROBE_DEFER) 868 dev_err(dev, 869 "Failed to get VDDIO regulator: %d\n", error); 870 return error; 871 } 872 873 retry_get_irq_gpio: 874 /* Get the interrupt GPIO pin number */ 875 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 876 if (IS_ERR(gpiod)) { 877 error = PTR_ERR(gpiod); 878 if (error != -EPROBE_DEFER) 879 dev_dbg(dev, "Failed to get %s GPIO: %d\n", 880 GOODIX_GPIO_INT_NAME, error); 881 return error; 882 } 883 if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 884 added_acpi_mappings = true; 885 if (goodix_add_acpi_gpio_mappings(ts) == 0) 886 goto retry_get_irq_gpio; 887 } 888 889 ts->gpiod_int = gpiod; 890 891 /* Get the reset line GPIO pin number */ 892 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 893 if (IS_ERR(gpiod)) { 894 error = PTR_ERR(gpiod); 895 if (error != -EPROBE_DEFER) 896 dev_dbg(dev, "Failed to get %s GPIO: %d\n", 897 GOODIX_GPIO_RST_NAME, error); 898 return error; 899 } 900 901 ts->gpiod_rst = gpiod; 902 903 switch (ts->irq_pin_access_method) { 904 case IRQ_PIN_ACCESS_ACPI_GPIO: 905 /* 906 * We end up here if goodix_add_acpi_gpio_mappings() has 907 * called devm_acpi_dev_add_driver_gpios() because the ACPI 908 * tables did not contain name to index mappings. 909 * Check that we successfully got both GPIOs after we've 910 * added our own acpi_gpio_mapping and if we did not get both 911 * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 912 */ 913 if (!ts->gpiod_int || !ts->gpiod_rst) 914 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 915 break; 916 case IRQ_PIN_ACCESS_ACPI_METHOD: 917 if (!ts->gpiod_rst) 918 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 919 break; 920 default: 921 if (ts->gpiod_int && ts->gpiod_rst) { 922 ts->reset_controller_at_probe = true; 923 ts->load_cfg_from_disk = true; 924 ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 925 } 926 } 927 928 return 0; 929 } 930 931 /** 932 * goodix_read_config - Read the embedded configuration of the panel 933 * 934 * @ts: our goodix_ts_data pointer 935 * 936 * Must be called during probe 937 */ 938 static void goodix_read_config(struct goodix_ts_data *ts) 939 { 940 int x_max, y_max; 941 int error; 942 943 error = goodix_i2c_read(ts->client, ts->chip->config_addr, 944 ts->config, ts->chip->config_len); 945 if (error) { 946 ts->int_trigger_type = GOODIX_INT_TRIGGER; 947 ts->max_touch_num = GOODIX_MAX_CONTACTS; 948 return; 949 } 950 951 ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 952 ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 953 954 x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 955 y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 956 if (x_max && y_max) { 957 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 958 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 959 } 960 961 ts->chip->calc_config_checksum(ts); 962 } 963 964 /** 965 * goodix_read_version - Read goodix touchscreen version 966 * 967 * @ts: our goodix_ts_data pointer 968 */ 969 static int goodix_read_version(struct goodix_ts_data *ts) 970 { 971 int error; 972 u8 buf[6]; 973 char id_str[GOODIX_ID_MAX_LEN + 1]; 974 975 error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 976 if (error) 977 return error; 978 979 memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 980 id_str[GOODIX_ID_MAX_LEN] = 0; 981 strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 982 983 ts->version = get_unaligned_le16(&buf[4]); 984 985 dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 986 ts->version); 987 988 return 0; 989 } 990 991 /** 992 * goodix_i2c_test - I2C test function to check if the device answers. 993 * 994 * @client: the i2c client 995 */ 996 static int goodix_i2c_test(struct i2c_client *client) 997 { 998 int retry = 0; 999 int error; 1000 u8 test; 1001 1002 while (retry++ < 2) { 1003 error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); 1004 if (!error) 1005 return 0; 1006 1007 msleep(20); 1008 } 1009 1010 return error; 1011 } 1012 1013 /** 1014 * goodix_configure_dev - Finish device initialization 1015 * 1016 * @ts: our goodix_ts_data pointer 1017 * 1018 * Must be called from probe to finish initialization of the device. 1019 * Contains the common initialization code for both devices that 1020 * declare gpio pins and devices that do not. It is either called 1021 * directly from probe or from request_firmware_wait callback. 1022 */ 1023 static int goodix_configure_dev(struct goodix_ts_data *ts) 1024 { 1025 int error; 1026 int i; 1027 1028 ts->int_trigger_type = GOODIX_INT_TRIGGER; 1029 ts->max_touch_num = GOODIX_MAX_CONTACTS; 1030 1031 ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1032 if (!ts->input_dev) { 1033 dev_err(&ts->client->dev, "Failed to allocate input device."); 1034 return -ENOMEM; 1035 } 1036 1037 ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1038 ts->input_dev->phys = "input/ts"; 1039 ts->input_dev->id.bustype = BUS_I2C; 1040 ts->input_dev->id.vendor = 0x0416; 1041 if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1042 ts->input_dev->id.product = 0x1001; 1043 ts->input_dev->id.version = ts->version; 1044 1045 ts->input_dev->keycode = ts->keymap; 1046 ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1047 ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1048 1049 /* Capacitive Windows/Home button on some devices */ 1050 for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1051 if (i == 0) 1052 ts->keymap[i] = KEY_LEFTMETA; 1053 else 1054 ts->keymap[i] = KEY_F1 + (i - 1); 1055 1056 input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1057 } 1058 1059 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1060 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1061 input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1062 input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1063 1064 /* Read configuration and apply touchscreen parameters */ 1065 goodix_read_config(ts); 1066 1067 /* Try overriding touchscreen parameters via device properties */ 1068 touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1069 1070 if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1071 dev_err(&ts->client->dev, 1072 "Invalid config (%d, %d, %d), using defaults\n", 1073 ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1074 ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1075 ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1076 ts->max_touch_num = GOODIX_MAX_CONTACTS; 1077 input_abs_set_max(ts->input_dev, 1078 ABS_MT_POSITION_X, ts->prop.max_x); 1079 input_abs_set_max(ts->input_dev, 1080 ABS_MT_POSITION_Y, ts->prop.max_y); 1081 } 1082 1083 if (dmi_check_system(rotated_screen)) { 1084 ts->prop.invert_x = true; 1085 ts->prop.invert_y = true; 1086 dev_dbg(&ts->client->dev, 1087 "Applying '180 degrees rotated screen' quirk\n"); 1088 } 1089 1090 if (dmi_check_system(nine_bytes_report)) { 1091 ts->contact_size = 9; 1092 1093 dev_dbg(&ts->client->dev, 1094 "Non-standard 9-bytes report format quirk\n"); 1095 } 1096 1097 if (dmi_check_system(inverted_x_screen)) { 1098 ts->prop.invert_x = true; 1099 dev_dbg(&ts->client->dev, 1100 "Applying 'inverted x screen' quirk\n"); 1101 } 1102 1103 error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1104 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1105 if (error) { 1106 dev_err(&ts->client->dev, 1107 "Failed to initialize MT slots: %d", error); 1108 return error; 1109 } 1110 1111 error = input_register_device(ts->input_dev); 1112 if (error) { 1113 dev_err(&ts->client->dev, 1114 "Failed to register input device: %d", error); 1115 return error; 1116 } 1117 1118 ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 1119 error = goodix_request_irq(ts); 1120 if (error) { 1121 dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 1122 return error; 1123 } 1124 1125 return 0; 1126 } 1127 1128 /** 1129 * goodix_config_cb - Callback to finish device init 1130 * 1131 * @cfg: firmware config 1132 * @ctx: our goodix_ts_data pointer 1133 * 1134 * request_firmware_wait callback that finishes 1135 * initialization of the device. 1136 */ 1137 static void goodix_config_cb(const struct firmware *cfg, void *ctx) 1138 { 1139 struct goodix_ts_data *ts = ctx; 1140 int error; 1141 1142 if (cfg) { 1143 /* send device configuration to the firmware */ 1144 error = goodix_send_cfg(ts, cfg->data, cfg->size); 1145 if (error) 1146 goto err_release_cfg; 1147 } 1148 1149 goodix_configure_dev(ts); 1150 1151 err_release_cfg: 1152 release_firmware(cfg); 1153 complete_all(&ts->firmware_loading_complete); 1154 } 1155 1156 static void goodix_disable_regulators(void *arg) 1157 { 1158 struct goodix_ts_data *ts = arg; 1159 1160 regulator_disable(ts->vddio); 1161 regulator_disable(ts->avdd28); 1162 } 1163 1164 static int goodix_ts_probe(struct i2c_client *client, 1165 const struct i2c_device_id *id) 1166 { 1167 struct goodix_ts_data *ts; 1168 const char *cfg_name; 1169 int error; 1170 1171 dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1172 1173 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1174 dev_err(&client->dev, "I2C check functionality failed.\n"); 1175 return -ENXIO; 1176 } 1177 1178 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1179 if (!ts) 1180 return -ENOMEM; 1181 1182 ts->client = client; 1183 i2c_set_clientdata(client, ts); 1184 init_completion(&ts->firmware_loading_complete); 1185 ts->contact_size = GOODIX_CONTACT_SIZE; 1186 1187 error = goodix_get_gpio_config(ts); 1188 if (error) 1189 return error; 1190 1191 /* power up the controller */ 1192 error = regulator_enable(ts->avdd28); 1193 if (error) { 1194 dev_err(&client->dev, 1195 "Failed to enable AVDD28 regulator: %d\n", 1196 error); 1197 return error; 1198 } 1199 1200 error = regulator_enable(ts->vddio); 1201 if (error) { 1202 dev_err(&client->dev, 1203 "Failed to enable VDDIO regulator: %d\n", 1204 error); 1205 regulator_disable(ts->avdd28); 1206 return error; 1207 } 1208 1209 error = devm_add_action_or_reset(&client->dev, 1210 goodix_disable_regulators, ts); 1211 if (error) 1212 return error; 1213 1214 reset: 1215 if (ts->reset_controller_at_probe) { 1216 /* reset the controller */ 1217 error = goodix_reset(ts); 1218 if (error) 1219 return error; 1220 } 1221 1222 error = goodix_i2c_test(client); 1223 if (error) { 1224 if (!ts->reset_controller_at_probe && 1225 ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 1226 /* Retry after a controller reset */ 1227 ts->reset_controller_at_probe = true; 1228 goto reset; 1229 } 1230 dev_err(&client->dev, "I2C communication failure: %d\n", error); 1231 return error; 1232 } 1233 1234 error = goodix_read_version(ts); 1235 if (error) 1236 return error; 1237 1238 ts->chip = goodix_get_chip_data(ts->id); 1239 1240 if (ts->load_cfg_from_disk) { 1241 /* update device config */ 1242 error = device_property_read_string(&client->dev, 1243 "goodix,config-name", 1244 &cfg_name); 1245 if (!error) 1246 snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1247 "goodix/%s", cfg_name); 1248 else 1249 snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1250 "goodix_%s_cfg.bin", ts->id); 1251 1252 error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 1253 &client->dev, GFP_KERNEL, ts, 1254 goodix_config_cb); 1255 if (error) { 1256 dev_err(&client->dev, 1257 "Failed to invoke firmware loader: %d\n", 1258 error); 1259 return error; 1260 } 1261 1262 return 0; 1263 } else { 1264 error = goodix_configure_dev(ts); 1265 if (error) 1266 return error; 1267 } 1268 1269 return 0; 1270 } 1271 1272 static int goodix_ts_remove(struct i2c_client *client) 1273 { 1274 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1275 1276 if (ts->load_cfg_from_disk) 1277 wait_for_completion(&ts->firmware_loading_complete); 1278 1279 return 0; 1280 } 1281 1282 static int __maybe_unused goodix_suspend(struct device *dev) 1283 { 1284 struct i2c_client *client = to_i2c_client(dev); 1285 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1286 int error; 1287 1288 if (ts->load_cfg_from_disk) 1289 wait_for_completion(&ts->firmware_loading_complete); 1290 1291 /* We need gpio pins to suspend/resume */ 1292 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1293 disable_irq(client->irq); 1294 return 0; 1295 } 1296 1297 /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 1298 goodix_free_irq(ts); 1299 1300 /* Output LOW on the INT pin for 5 ms */ 1301 error = goodix_irq_direction_output(ts, 0); 1302 if (error) { 1303 goodix_request_irq(ts); 1304 return error; 1305 } 1306 1307 usleep_range(5000, 6000); 1308 1309 error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 1310 GOODIX_CMD_SCREEN_OFF); 1311 if (error) { 1312 goodix_irq_direction_input(ts); 1313 goodix_request_irq(ts); 1314 return -EAGAIN; 1315 } 1316 1317 /* 1318 * The datasheet specifies that the interval between sending screen-off 1319 * command and wake-up should be longer than 58 ms. To avoid waking up 1320 * sooner, delay 58ms here. 1321 */ 1322 msleep(58); 1323 return 0; 1324 } 1325 1326 static int __maybe_unused goodix_resume(struct device *dev) 1327 { 1328 struct i2c_client *client = to_i2c_client(dev); 1329 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1330 u8 config_ver; 1331 int error; 1332 1333 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1334 enable_irq(client->irq); 1335 return 0; 1336 } 1337 1338 /* 1339 * Exit sleep mode by outputting HIGH level to INT pin 1340 * for 2ms~5ms. 1341 */ 1342 error = goodix_irq_direction_output(ts, 1); 1343 if (error) 1344 return error; 1345 1346 usleep_range(2000, 5000); 1347 1348 error = goodix_int_sync(ts); 1349 if (error) 1350 return error; 1351 1352 error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1353 &config_ver, 1); 1354 if (!error && config_ver != ts->config[0]) 1355 dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1356 config_ver, ts->config[0]); 1357 1358 if (error != 0 || config_ver != ts->config[0]) { 1359 error = goodix_reset(ts); 1360 if (error) 1361 return error; 1362 1363 error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1364 if (error) 1365 return error; 1366 } 1367 1368 error = goodix_request_irq(ts); 1369 if (error) 1370 return error; 1371 1372 return 0; 1373 } 1374 1375 static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 1376 1377 static const struct i2c_device_id goodix_ts_id[] = { 1378 { "GDIX1001:00", 0 }, 1379 { } 1380 }; 1381 MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1382 1383 #ifdef CONFIG_ACPI 1384 static const struct acpi_device_id goodix_acpi_match[] = { 1385 { "GDIX1001", 0 }, 1386 { "GDIX1002", 0 }, 1387 { } 1388 }; 1389 MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1390 #endif 1391 1392 #ifdef CONFIG_OF 1393 static const struct of_device_id goodix_of_match[] = { 1394 { .compatible = "goodix,gt1151" }, 1395 { .compatible = "goodix,gt5663" }, 1396 { .compatible = "goodix,gt5688" }, 1397 { .compatible = "goodix,gt911" }, 1398 { .compatible = "goodix,gt9110" }, 1399 { .compatible = "goodix,gt912" }, 1400 { .compatible = "goodix,gt9147" }, 1401 { .compatible = "goodix,gt917s" }, 1402 { .compatible = "goodix,gt927" }, 1403 { .compatible = "goodix,gt9271" }, 1404 { .compatible = "goodix,gt928" }, 1405 { .compatible = "goodix,gt9286" }, 1406 { .compatible = "goodix,gt967" }, 1407 { } 1408 }; 1409 MODULE_DEVICE_TABLE(of, goodix_of_match); 1410 #endif 1411 1412 static struct i2c_driver goodix_ts_driver = { 1413 .probe = goodix_ts_probe, 1414 .remove = goodix_ts_remove, 1415 .id_table = goodix_ts_id, 1416 .driver = { 1417 .name = "Goodix-TS", 1418 .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1419 .of_match_table = of_match_ptr(goodix_of_match), 1420 .pm = &goodix_pm_ops, 1421 }, 1422 }; 1423 module_i2c_driver(goodix_ts_driver); 1424 1425 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1426 MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1427 MODULE_DESCRIPTION("Goodix touchscreen driver"); 1428 MODULE_LICENSE("GPL v2"); 1429