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 = "9111", .data = >911_chip_data }, 106 { .id = "927", .data = >911_chip_data }, 107 { .id = "928", .data = >911_chip_data }, 108 109 { .id = "912", .data = >967_chip_data }, 110 { .id = "9147", .data = >967_chip_data }, 111 { .id = "967", .data = >967_chip_data }, 112 { } 113 }; 114 115 static const unsigned long goodix_irq_flags[] = { 116 IRQ_TYPE_EDGE_RISING, 117 IRQ_TYPE_EDGE_FALLING, 118 IRQ_TYPE_LEVEL_LOW, 119 IRQ_TYPE_LEVEL_HIGH, 120 }; 121 122 static const struct dmi_system_id nine_bytes_report[] = { 123 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 124 { 125 .ident = "Lenovo YogaBook", 126 /* YB1-X91L/F and YB1-X90L/F */ 127 .matches = { 128 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 129 } 130 }, 131 #endif 132 {} 133 }; 134 135 /* 136 * Those tablets have their x coordinate inverted 137 */ 138 static const struct dmi_system_id inverted_x_screen[] = { 139 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 140 { 141 .ident = "Cube I15-TC", 142 .matches = { 143 DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 144 DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 145 }, 146 }, 147 #endif 148 {} 149 }; 150 151 /** 152 * goodix_i2c_read - read data from a register of the i2c slave device. 153 * 154 * @client: i2c device. 155 * @reg: the register to read from. 156 * @buf: raw write data buffer. 157 * @len: length of the buffer to write 158 */ 159 int goodix_i2c_read(struct i2c_client *client, u16 reg, u8 *buf, int len) 160 { 161 struct i2c_msg msgs[2]; 162 __be16 wbuf = cpu_to_be16(reg); 163 int ret; 164 165 msgs[0].flags = 0; 166 msgs[0].addr = client->addr; 167 msgs[0].len = 2; 168 msgs[0].buf = (u8 *)&wbuf; 169 170 msgs[1].flags = I2C_M_RD; 171 msgs[1].addr = client->addr; 172 msgs[1].len = len; 173 msgs[1].buf = buf; 174 175 ret = i2c_transfer(client->adapter, msgs, 2); 176 if (ret >= 0) 177 ret = (ret == ARRAY_SIZE(msgs) ? 0 : -EIO); 178 179 if (ret) 180 dev_err(&client->dev, "Error reading %d bytes from 0x%04x: %d\n", 181 len, reg, ret); 182 return ret; 183 } 184 185 /** 186 * goodix_i2c_write - write data to a register of the i2c slave device. 187 * 188 * @client: i2c device. 189 * @reg: the register to write to. 190 * @buf: raw data buffer to write. 191 * @len: length of the buffer to write 192 */ 193 int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, int len) 194 { 195 u8 *addr_buf; 196 struct i2c_msg msg; 197 int ret; 198 199 addr_buf = kmalloc(len + 2, GFP_KERNEL); 200 if (!addr_buf) 201 return -ENOMEM; 202 203 addr_buf[0] = reg >> 8; 204 addr_buf[1] = reg & 0xFF; 205 memcpy(&addr_buf[2], buf, len); 206 207 msg.flags = 0; 208 msg.addr = client->addr; 209 msg.buf = addr_buf; 210 msg.len = len + 2; 211 212 ret = i2c_transfer(client->adapter, &msg, 1); 213 if (ret >= 0) 214 ret = (ret == 1 ? 0 : -EIO); 215 216 kfree(addr_buf); 217 218 if (ret) 219 dev_err(&client->dev, "Error writing %d bytes to 0x%04x: %d\n", 220 len, reg, ret); 221 return ret; 222 } 223 224 int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 225 { 226 return goodix_i2c_write(client, reg, &value, sizeof(value)); 227 } 228 229 static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 230 { 231 unsigned int i; 232 233 for (i = 0; goodix_chip_ids[i].id; i++) { 234 if (!strcmp(goodix_chip_ids[i].id, id)) 235 return goodix_chip_ids[i].data; 236 } 237 238 return >9x_chip_data; 239 } 240 241 static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 242 { 243 unsigned long max_timeout; 244 int touch_num; 245 int error; 246 u16 addr = GOODIX_READ_COOR_ADDR; 247 /* 248 * We are going to read 1-byte header, 249 * ts->contact_size * max(1, touch_num) bytes of coordinates 250 * and 1-byte footer which contains the touch-key code. 251 */ 252 const int header_contact_keycode_size = 1 + ts->contact_size + 1; 253 254 /* 255 * The 'buffer status' bit, which indicates that the data is valid, is 256 * not set as soon as the interrupt is raised, but slightly after. 257 * This takes around 10 ms to happen, so we poll for 20 ms. 258 */ 259 max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 260 do { 261 error = goodix_i2c_read(ts->client, addr, data, 262 header_contact_keycode_size); 263 if (error) 264 return error; 265 266 if (data[0] & GOODIX_BUFFER_STATUS_READY) { 267 touch_num = data[0] & 0x0f; 268 if (touch_num > ts->max_touch_num) 269 return -EPROTO; 270 271 if (touch_num > 1) { 272 addr += header_contact_keycode_size; 273 data += header_contact_keycode_size; 274 error = goodix_i2c_read(ts->client, 275 addr, data, 276 ts->contact_size * 277 (touch_num - 1)); 278 if (error) 279 return error; 280 } 281 282 return touch_num; 283 } 284 285 if (data[0] == 0 && ts->firmware_name) { 286 if (goodix_handle_fw_request(ts)) 287 return 0; 288 } 289 290 usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 291 } while (time_before(jiffies, max_timeout)); 292 293 /* 294 * The Goodix panel will send spurious interrupts after a 295 * 'finger up' event, which will always cause a timeout. 296 */ 297 return -ENOMSG; 298 } 299 300 static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 301 { 302 int id = coor_data[0] & 0x0F; 303 int input_x = get_unaligned_le16(&coor_data[1]); 304 int input_y = get_unaligned_le16(&coor_data[3]); 305 int input_w = get_unaligned_le16(&coor_data[5]); 306 307 input_mt_slot(ts->input_dev, id); 308 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 309 touchscreen_report_pos(ts->input_dev, &ts->prop, 310 input_x, input_y, true); 311 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 312 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 313 } 314 315 static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 316 { 317 int id = coor_data[1] & 0x0F; 318 int input_x = get_unaligned_le16(&coor_data[3]); 319 int input_y = get_unaligned_le16(&coor_data[5]); 320 int input_w = get_unaligned_le16(&coor_data[7]); 321 322 input_mt_slot(ts->input_dev, id); 323 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 324 touchscreen_report_pos(ts->input_dev, &ts->prop, 325 input_x, input_y, true); 326 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 327 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 328 } 329 330 static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 331 { 332 int touch_num; 333 u8 key_value; 334 int i; 335 336 if (data[0] & GOODIX_HAVE_KEY) { 337 touch_num = data[0] & 0x0f; 338 key_value = data[1 + ts->contact_size * touch_num]; 339 for (i = 0; i < GOODIX_MAX_KEYS; i++) 340 if (key_value & BIT(i)) 341 input_report_key(ts->input_dev, 342 ts->keymap[i], 1); 343 } else { 344 for (i = 0; i < GOODIX_MAX_KEYS; i++) 345 input_report_key(ts->input_dev, ts->keymap[i], 0); 346 } 347 } 348 349 /** 350 * goodix_process_events - Process incoming events 351 * 352 * @ts: our goodix_ts_data pointer 353 * 354 * Called when the IRQ is triggered. Read the current device state, and push 355 * the input events to the user space. 356 */ 357 static void goodix_process_events(struct goodix_ts_data *ts) 358 { 359 u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 360 int touch_num; 361 int i; 362 363 touch_num = goodix_ts_read_input_report(ts, point_data); 364 if (touch_num < 0) 365 return; 366 367 goodix_ts_report_key(ts, point_data); 368 369 for (i = 0; i < touch_num; i++) 370 if (ts->contact_size == 9) 371 goodix_ts_report_touch_9b(ts, 372 &point_data[1 + ts->contact_size * i]); 373 else 374 goodix_ts_report_touch_8b(ts, 375 &point_data[1 + ts->contact_size * i]); 376 377 input_mt_sync_frame(ts->input_dev); 378 input_sync(ts->input_dev); 379 } 380 381 /** 382 * goodix_ts_irq_handler - The IRQ handler 383 * 384 * @irq: interrupt number. 385 * @dev_id: private data pointer. 386 */ 387 static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 388 { 389 struct goodix_ts_data *ts = dev_id; 390 391 goodix_process_events(ts); 392 goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0); 393 394 return IRQ_HANDLED; 395 } 396 397 static void goodix_free_irq(struct goodix_ts_data *ts) 398 { 399 devm_free_irq(&ts->client->dev, ts->client->irq, ts); 400 } 401 402 static int goodix_request_irq(struct goodix_ts_data *ts) 403 { 404 return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 405 NULL, goodix_ts_irq_handler, 406 ts->irq_flags, ts->client->name, ts); 407 } 408 409 static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 410 { 411 int i, raw_cfg_len = len - 2; 412 u8 check_sum = 0; 413 414 for (i = 0; i < raw_cfg_len; i++) 415 check_sum += cfg[i]; 416 check_sum = (~check_sum) + 1; 417 if (check_sum != cfg[raw_cfg_len]) { 418 dev_err(&ts->client->dev, 419 "The checksum of the config fw is not correct"); 420 return -EINVAL; 421 } 422 423 if (cfg[raw_cfg_len + 1] != 1) { 424 dev_err(&ts->client->dev, 425 "Config fw must have Config_Fresh register set"); 426 return -EINVAL; 427 } 428 429 return 0; 430 } 431 432 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 433 { 434 int i, raw_cfg_len = ts->chip->config_len - 2; 435 u8 check_sum = 0; 436 437 for (i = 0; i < raw_cfg_len; i++) 438 check_sum += ts->config[i]; 439 check_sum = (~check_sum) + 1; 440 441 ts->config[raw_cfg_len] = check_sum; 442 ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 443 } 444 445 static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 446 int len) 447 { 448 int i, raw_cfg_len = len - 3; 449 u16 check_sum = 0; 450 451 for (i = 0; i < raw_cfg_len; i += 2) 452 check_sum += get_unaligned_be16(&cfg[i]); 453 check_sum = (~check_sum) + 1; 454 if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 455 dev_err(&ts->client->dev, 456 "The checksum of the config fw is not correct"); 457 return -EINVAL; 458 } 459 460 if (cfg[raw_cfg_len + 2] != 1) { 461 dev_err(&ts->client->dev, 462 "Config fw must have Config_Fresh register set"); 463 return -EINVAL; 464 } 465 466 return 0; 467 } 468 469 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 470 { 471 int i, raw_cfg_len = ts->chip->config_len - 3; 472 u16 check_sum = 0; 473 474 for (i = 0; i < raw_cfg_len; i += 2) 475 check_sum += get_unaligned_be16(&ts->config[i]); 476 check_sum = (~check_sum) + 1; 477 478 put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 479 ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 480 } 481 482 /** 483 * goodix_check_cfg - Checks if config fw is valid 484 * 485 * @ts: goodix_ts_data pointer 486 * @cfg: firmware config data 487 * @len: config data length 488 */ 489 static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 490 { 491 if (len < GOODIX_CONFIG_MIN_LENGTH || 492 len > GOODIX_CONFIG_MAX_LENGTH) { 493 dev_err(&ts->client->dev, 494 "The length of the config fw is not correct"); 495 return -EINVAL; 496 } 497 498 return ts->chip->check_config(ts, cfg, len); 499 } 500 501 /** 502 * goodix_send_cfg - Write fw config to device 503 * 504 * @ts: goodix_ts_data pointer 505 * @cfg: config firmware to write to device 506 * @len: config data length 507 */ 508 int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 509 { 510 int error; 511 512 error = goodix_check_cfg(ts, cfg, len); 513 if (error) 514 return error; 515 516 error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 517 if (error) 518 return error; 519 520 dev_dbg(&ts->client->dev, "Config sent successfully."); 521 522 /* Let the firmware reconfigure itself, so sleep for 10ms */ 523 usleep_range(10000, 11000); 524 525 return 0; 526 } 527 528 #ifdef ACPI_GPIO_SUPPORT 529 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 530 { 531 acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 532 acpi_status status; 533 534 status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 535 return ACPI_SUCCESS(status) ? 0 : -EIO; 536 } 537 538 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 539 { 540 acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 541 acpi_status status; 542 543 status = acpi_execute_simple_method(handle, "INTO", value); 544 return ACPI_SUCCESS(status) ? 0 : -EIO; 545 } 546 #else 547 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 548 { 549 dev_err(&ts->client->dev, 550 "%s called on device without ACPI support\n", __func__); 551 return -EINVAL; 552 } 553 554 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 555 { 556 dev_err(&ts->client->dev, 557 "%s called on device without ACPI support\n", __func__); 558 return -EINVAL; 559 } 560 #endif 561 562 static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 563 { 564 switch (ts->irq_pin_access_method) { 565 case IRQ_PIN_ACCESS_NONE: 566 dev_err(&ts->client->dev, 567 "%s called without an irq_pin_access_method set\n", 568 __func__); 569 return -EINVAL; 570 case IRQ_PIN_ACCESS_GPIO: 571 return gpiod_direction_output(ts->gpiod_int, value); 572 case IRQ_PIN_ACCESS_ACPI_GPIO: 573 /* 574 * The IRQ pin triggers on a falling edge, so its gets marked 575 * as active-low, use output_raw to avoid the value inversion. 576 */ 577 return gpiod_direction_output_raw(ts->gpiod_int, value); 578 case IRQ_PIN_ACCESS_ACPI_METHOD: 579 return goodix_pin_acpi_output_method(ts, value); 580 } 581 582 return -EINVAL; /* Never reached */ 583 } 584 585 static int goodix_irq_direction_input(struct goodix_ts_data *ts) 586 { 587 switch (ts->irq_pin_access_method) { 588 case IRQ_PIN_ACCESS_NONE: 589 dev_err(&ts->client->dev, 590 "%s called without an irq_pin_access_method set\n", 591 __func__); 592 return -EINVAL; 593 case IRQ_PIN_ACCESS_GPIO: 594 return gpiod_direction_input(ts->gpiod_int); 595 case IRQ_PIN_ACCESS_ACPI_GPIO: 596 return gpiod_direction_input(ts->gpiod_int); 597 case IRQ_PIN_ACCESS_ACPI_METHOD: 598 return goodix_pin_acpi_direction_input(ts); 599 } 600 601 return -EINVAL; /* Never reached */ 602 } 603 604 int goodix_int_sync(struct goodix_ts_data *ts) 605 { 606 int error; 607 608 error = goodix_irq_direction_output(ts, 0); 609 if (error) 610 goto error; 611 612 msleep(50); /* T5: 50ms */ 613 614 error = goodix_irq_direction_input(ts); 615 if (error) 616 goto error; 617 618 return 0; 619 620 error: 621 dev_err(&ts->client->dev, "Controller irq sync failed.\n"); 622 return error; 623 } 624 625 /** 626 * goodix_reset_no_int_sync - Reset device, leaving interrupt line in output mode 627 * 628 * @ts: goodix_ts_data pointer 629 */ 630 int goodix_reset_no_int_sync(struct goodix_ts_data *ts) 631 { 632 int error; 633 634 /* begin select I2C slave addr */ 635 error = gpiod_direction_output(ts->gpiod_rst, 0); 636 if (error) 637 goto error; 638 639 msleep(20); /* T2: > 10ms */ 640 641 /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 642 error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 643 if (error) 644 goto error; 645 646 usleep_range(100, 2000); /* T3: > 100us */ 647 648 error = gpiod_direction_output(ts->gpiod_rst, 1); 649 if (error) 650 goto error; 651 652 usleep_range(6000, 10000); /* T4: > 5ms */ 653 654 /* 655 * Put the reset pin back in to input / high-impedance mode to save 656 * power. Only do this in the non ACPI case since some ACPI boards 657 * don't have a pull-up, so there the reset pin must stay active-high. 658 */ 659 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_GPIO) { 660 error = gpiod_direction_input(ts->gpiod_rst); 661 if (error) 662 goto error; 663 } 664 665 return 0; 666 667 error: 668 dev_err(&ts->client->dev, "Controller reset failed.\n"); 669 return error; 670 } 671 672 /** 673 * goodix_reset - Reset device during power on 674 * 675 * @ts: goodix_ts_data pointer 676 */ 677 static int goodix_reset(struct goodix_ts_data *ts) 678 { 679 int error; 680 681 error = goodix_reset_no_int_sync(ts); 682 if (error) 683 return error; 684 685 return goodix_int_sync(ts); 686 } 687 688 #ifdef ACPI_GPIO_SUPPORT 689 #include <asm/cpu_device_id.h> 690 #include <asm/intel-family.h> 691 692 static const struct x86_cpu_id baytrail_cpu_ids[] = { 693 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 694 {} 695 }; 696 697 static inline bool is_byt(void) 698 { 699 const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 700 701 return !!id; 702 } 703 704 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 705 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 706 707 static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 708 { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 709 { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 710 { }, 711 }; 712 713 static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 714 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 715 { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 716 { }, 717 }; 718 719 static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 720 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 721 { }, 722 }; 723 724 static int goodix_resource(struct acpi_resource *ares, void *data) 725 { 726 struct goodix_ts_data *ts = data; 727 struct device *dev = &ts->client->dev; 728 struct acpi_resource_gpio *gpio; 729 730 switch (ares->type) { 731 case ACPI_RESOURCE_TYPE_GPIO: 732 gpio = &ares->data.gpio; 733 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 734 if (ts->gpio_int_idx == -1) { 735 ts->gpio_int_idx = ts->gpio_count; 736 } else { 737 dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 738 ts->gpio_int_idx = -2; 739 } 740 } 741 ts->gpio_count++; 742 break; 743 default: 744 break; 745 } 746 747 return 0; 748 } 749 750 /* 751 * This function gets called in case we fail to get the irq GPIO directly 752 * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 753 * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 754 * In that case we add our own mapping and then goodix_get_gpio_config() 755 * retries to get the GPIOs based on the added mapping. 756 */ 757 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 758 { 759 const struct acpi_gpio_mapping *gpio_mapping = NULL; 760 struct device *dev = &ts->client->dev; 761 LIST_HEAD(resources); 762 int ret; 763 764 ts->gpio_count = 0; 765 ts->gpio_int_idx = -1; 766 ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 767 goodix_resource, ts); 768 if (ret < 0) { 769 dev_err(dev, "Error getting ACPI resources: %d\n", ret); 770 return ret; 771 } 772 773 acpi_dev_free_resource_list(&resources); 774 775 if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 776 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 777 gpio_mapping = acpi_goodix_int_first_gpios; 778 } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 779 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 780 gpio_mapping = acpi_goodix_int_last_gpios; 781 } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 782 acpi_has_method(ACPI_HANDLE(dev), "INTI") && 783 acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 784 dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 785 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 786 gpio_mapping = acpi_goodix_reset_only_gpios; 787 } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 788 dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 789 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 790 gpio_mapping = acpi_goodix_int_last_gpios; 791 } else { 792 dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 793 ts->gpio_count, ts->gpio_int_idx); 794 return -EINVAL; 795 } 796 797 /* 798 * Normally we put the reset pin in input / high-impedance mode to save 799 * power. But some x86/ACPI boards don't have a pull-up, so for the ACPI 800 * case, leave the pin as is. This results in the pin not being touched 801 * at all on x86/ACPI boards, except when needed for error-recover. 802 */ 803 ts->gpiod_rst_flags = GPIOD_ASIS; 804 805 return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 806 } 807 #else 808 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 809 { 810 return -EINVAL; 811 } 812 #endif /* CONFIG_X86 && CONFIG_ACPI */ 813 814 /** 815 * goodix_get_gpio_config - Get GPIO config from ACPI/DT 816 * 817 * @ts: goodix_ts_data pointer 818 */ 819 static int goodix_get_gpio_config(struct goodix_ts_data *ts) 820 { 821 int error; 822 struct device *dev; 823 struct gpio_desc *gpiod; 824 bool added_acpi_mappings = false; 825 826 if (!ts->client) 827 return -EINVAL; 828 dev = &ts->client->dev; 829 830 /* 831 * By default we request the reset pin as input, leaving it in 832 * high-impedance when not resetting the controller to save power. 833 */ 834 ts->gpiod_rst_flags = GPIOD_IN; 835 836 ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 837 if (IS_ERR(ts->avdd28)) { 838 error = PTR_ERR(ts->avdd28); 839 if (error != -EPROBE_DEFER) 840 dev_err(dev, 841 "Failed to get AVDD28 regulator: %d\n", error); 842 return error; 843 } 844 845 ts->vddio = devm_regulator_get(dev, "VDDIO"); 846 if (IS_ERR(ts->vddio)) { 847 error = PTR_ERR(ts->vddio); 848 if (error != -EPROBE_DEFER) 849 dev_err(dev, 850 "Failed to get VDDIO regulator: %d\n", error); 851 return error; 852 } 853 854 retry_get_irq_gpio: 855 /* Get the interrupt GPIO pin number */ 856 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 857 if (IS_ERR(gpiod)) { 858 error = PTR_ERR(gpiod); 859 if (error != -EPROBE_DEFER) 860 dev_dbg(dev, "Failed to get %s GPIO: %d\n", 861 GOODIX_GPIO_INT_NAME, error); 862 return error; 863 } 864 if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 865 added_acpi_mappings = true; 866 if (goodix_add_acpi_gpio_mappings(ts) == 0) 867 goto retry_get_irq_gpio; 868 } 869 870 ts->gpiod_int = gpiod; 871 872 /* Get the reset line GPIO pin number */ 873 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, ts->gpiod_rst_flags); 874 if (IS_ERR(gpiod)) { 875 error = PTR_ERR(gpiod); 876 if (error != -EPROBE_DEFER) 877 dev_dbg(dev, "Failed to get %s GPIO: %d\n", 878 GOODIX_GPIO_RST_NAME, error); 879 return error; 880 } 881 882 ts->gpiod_rst = gpiod; 883 884 switch (ts->irq_pin_access_method) { 885 case IRQ_PIN_ACCESS_ACPI_GPIO: 886 /* 887 * We end up here if goodix_add_acpi_gpio_mappings() has 888 * called devm_acpi_dev_add_driver_gpios() because the ACPI 889 * tables did not contain name to index mappings. 890 * Check that we successfully got both GPIOs after we've 891 * added our own acpi_gpio_mapping and if we did not get both 892 * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 893 */ 894 if (!ts->gpiod_int || !ts->gpiod_rst) 895 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 896 break; 897 case IRQ_PIN_ACCESS_ACPI_METHOD: 898 if (!ts->gpiod_rst) 899 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 900 break; 901 default: 902 if (ts->gpiod_int && ts->gpiod_rst) { 903 ts->reset_controller_at_probe = true; 904 ts->load_cfg_from_disk = true; 905 ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 906 } 907 } 908 909 return 0; 910 } 911 912 /** 913 * goodix_read_config - Read the embedded configuration of the panel 914 * 915 * @ts: our goodix_ts_data pointer 916 * 917 * Must be called during probe 918 */ 919 static void goodix_read_config(struct goodix_ts_data *ts) 920 { 921 int x_max, y_max; 922 int error; 923 924 /* 925 * On controllers where we need to upload the firmware 926 * (controllers without flash) ts->config already has the config 927 * at this point and the controller itself does not have it yet! 928 */ 929 if (!ts->firmware_name) { 930 error = goodix_i2c_read(ts->client, ts->chip->config_addr, 931 ts->config, ts->chip->config_len); 932 if (error) { 933 ts->int_trigger_type = GOODIX_INT_TRIGGER; 934 ts->max_touch_num = GOODIX_MAX_CONTACTS; 935 return; 936 } 937 } 938 939 ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 940 ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 941 942 x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 943 y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 944 if (x_max && y_max) { 945 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 946 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 947 } 948 949 ts->chip->calc_config_checksum(ts); 950 } 951 952 /** 953 * goodix_read_version - Read goodix touchscreen version 954 * 955 * @ts: our goodix_ts_data pointer 956 */ 957 static int goodix_read_version(struct goodix_ts_data *ts) 958 { 959 int error; 960 u8 buf[6]; 961 char id_str[GOODIX_ID_MAX_LEN + 1]; 962 963 error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 964 if (error) 965 return error; 966 967 memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 968 id_str[GOODIX_ID_MAX_LEN] = 0; 969 strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 970 971 ts->version = get_unaligned_le16(&buf[4]); 972 973 dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 974 ts->version); 975 976 return 0; 977 } 978 979 /** 980 * goodix_i2c_test - I2C test function to check if the device answers. 981 * 982 * @client: the i2c client 983 */ 984 static int goodix_i2c_test(struct i2c_client *client) 985 { 986 int retry = 0; 987 int error; 988 u8 test; 989 990 while (retry++ < 2) { 991 error = goodix_i2c_read(client, GOODIX_REG_ID, &test, 1); 992 if (!error) 993 return 0; 994 995 msleep(20); 996 } 997 998 return error; 999 } 1000 1001 /** 1002 * goodix_configure_dev - Finish device initialization 1003 * 1004 * @ts: our goodix_ts_data pointer 1005 * 1006 * Must be called from probe to finish initialization of the device. 1007 * Contains the common initialization code for both devices that 1008 * declare gpio pins and devices that do not. It is either called 1009 * directly from probe or from request_firmware_wait callback. 1010 */ 1011 static int goodix_configure_dev(struct goodix_ts_data *ts) 1012 { 1013 int error; 1014 int i; 1015 1016 ts->int_trigger_type = GOODIX_INT_TRIGGER; 1017 ts->max_touch_num = GOODIX_MAX_CONTACTS; 1018 1019 ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1020 if (!ts->input_dev) { 1021 dev_err(&ts->client->dev, "Failed to allocate input device."); 1022 return -ENOMEM; 1023 } 1024 1025 ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1026 ts->input_dev->phys = "input/ts"; 1027 ts->input_dev->id.bustype = BUS_I2C; 1028 ts->input_dev->id.vendor = 0x0416; 1029 if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1030 ts->input_dev->id.product = 0x1001; 1031 ts->input_dev->id.version = ts->version; 1032 1033 ts->input_dev->keycode = ts->keymap; 1034 ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1035 ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1036 1037 /* Capacitive Windows/Home button on some devices */ 1038 for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1039 if (i == 0) 1040 ts->keymap[i] = KEY_LEFTMETA; 1041 else 1042 ts->keymap[i] = KEY_F1 + (i - 1); 1043 1044 input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1045 } 1046 1047 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1048 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1049 input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1050 input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1051 1052 /* Read configuration and apply touchscreen parameters */ 1053 goodix_read_config(ts); 1054 1055 /* Try overriding touchscreen parameters via device properties */ 1056 touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1057 1058 if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1059 dev_err(&ts->client->dev, 1060 "Invalid config (%d, %d, %d), using defaults\n", 1061 ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1062 ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1063 ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1064 ts->max_touch_num = GOODIX_MAX_CONTACTS; 1065 input_abs_set_max(ts->input_dev, 1066 ABS_MT_POSITION_X, ts->prop.max_x); 1067 input_abs_set_max(ts->input_dev, 1068 ABS_MT_POSITION_Y, ts->prop.max_y); 1069 } 1070 1071 if (dmi_check_system(nine_bytes_report)) { 1072 ts->contact_size = 9; 1073 1074 dev_dbg(&ts->client->dev, 1075 "Non-standard 9-bytes report format quirk\n"); 1076 } 1077 1078 if (dmi_check_system(inverted_x_screen)) { 1079 ts->prop.invert_x = true; 1080 dev_dbg(&ts->client->dev, 1081 "Applying 'inverted x screen' quirk\n"); 1082 } 1083 1084 error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1085 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1086 if (error) { 1087 dev_err(&ts->client->dev, 1088 "Failed to initialize MT slots: %d", error); 1089 return error; 1090 } 1091 1092 error = input_register_device(ts->input_dev); 1093 if (error) { 1094 dev_err(&ts->client->dev, 1095 "Failed to register input device: %d", error); 1096 return error; 1097 } 1098 1099 ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 1100 error = goodix_request_irq(ts); 1101 if (error) { 1102 dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 1103 return error; 1104 } 1105 1106 return 0; 1107 } 1108 1109 /** 1110 * goodix_config_cb - Callback to finish device init 1111 * 1112 * @cfg: firmware config 1113 * @ctx: our goodix_ts_data pointer 1114 * 1115 * request_firmware_wait callback that finishes 1116 * initialization of the device. 1117 */ 1118 static void goodix_config_cb(const struct firmware *cfg, void *ctx) 1119 { 1120 struct goodix_ts_data *ts = ctx; 1121 int error; 1122 1123 if (ts->firmware_name) { 1124 if (!cfg) 1125 goto err_release_cfg; 1126 1127 error = goodix_check_cfg(ts, cfg->data, cfg->size); 1128 if (error) 1129 goto err_release_cfg; 1130 1131 memcpy(ts->config, cfg->data, cfg->size); 1132 } else if (cfg) { 1133 /* send device configuration to the firmware */ 1134 error = goodix_send_cfg(ts, cfg->data, cfg->size); 1135 if (error) 1136 goto err_release_cfg; 1137 } 1138 1139 goodix_configure_dev(ts); 1140 1141 err_release_cfg: 1142 release_firmware(cfg); 1143 complete_all(&ts->firmware_loading_complete); 1144 } 1145 1146 static void goodix_disable_regulators(void *arg) 1147 { 1148 struct goodix_ts_data *ts = arg; 1149 1150 regulator_disable(ts->vddio); 1151 regulator_disable(ts->avdd28); 1152 } 1153 1154 static int goodix_ts_probe(struct i2c_client *client, 1155 const struct i2c_device_id *id) 1156 { 1157 struct goodix_ts_data *ts; 1158 const char *cfg_name; 1159 int error; 1160 1161 dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 1162 1163 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 1164 dev_err(&client->dev, "I2C check functionality failed.\n"); 1165 return -ENXIO; 1166 } 1167 1168 ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 1169 if (!ts) 1170 return -ENOMEM; 1171 1172 ts->client = client; 1173 i2c_set_clientdata(client, ts); 1174 init_completion(&ts->firmware_loading_complete); 1175 ts->contact_size = GOODIX_CONTACT_SIZE; 1176 1177 error = goodix_get_gpio_config(ts); 1178 if (error) 1179 return error; 1180 1181 /* power up the controller */ 1182 error = regulator_enable(ts->avdd28); 1183 if (error) { 1184 dev_err(&client->dev, 1185 "Failed to enable AVDD28 regulator: %d\n", 1186 error); 1187 return error; 1188 } 1189 1190 error = regulator_enable(ts->vddio); 1191 if (error) { 1192 dev_err(&client->dev, 1193 "Failed to enable VDDIO regulator: %d\n", 1194 error); 1195 regulator_disable(ts->avdd28); 1196 return error; 1197 } 1198 1199 error = devm_add_action_or_reset(&client->dev, 1200 goodix_disable_regulators, ts); 1201 if (error) 1202 return error; 1203 1204 reset: 1205 if (ts->reset_controller_at_probe) { 1206 /* reset the controller */ 1207 error = goodix_reset(ts); 1208 if (error) 1209 return error; 1210 } 1211 1212 error = goodix_i2c_test(client); 1213 if (error) { 1214 if (!ts->reset_controller_at_probe && 1215 ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 1216 /* Retry after a controller reset */ 1217 ts->reset_controller_at_probe = true; 1218 goto reset; 1219 } 1220 dev_err(&client->dev, "I2C communication failure: %d\n", error); 1221 return error; 1222 } 1223 1224 error = goodix_firmware_check(ts); 1225 if (error) 1226 return error; 1227 1228 error = goodix_read_version(ts); 1229 if (error) 1230 return error; 1231 1232 ts->chip = goodix_get_chip_data(ts->id); 1233 1234 if (ts->load_cfg_from_disk) { 1235 /* update device config */ 1236 error = device_property_read_string(&client->dev, 1237 "goodix,config-name", 1238 &cfg_name); 1239 if (!error) 1240 snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1241 "goodix/%s", cfg_name); 1242 else 1243 snprintf(ts->cfg_name, sizeof(ts->cfg_name), 1244 "goodix_%s_cfg.bin", ts->id); 1245 1246 error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 1247 &client->dev, GFP_KERNEL, ts, 1248 goodix_config_cb); 1249 if (error) { 1250 dev_err(&client->dev, 1251 "Failed to invoke firmware loader: %d\n", 1252 error); 1253 return error; 1254 } 1255 1256 return 0; 1257 } else { 1258 error = goodix_configure_dev(ts); 1259 if (error) 1260 return error; 1261 } 1262 1263 return 0; 1264 } 1265 1266 static int goodix_ts_remove(struct i2c_client *client) 1267 { 1268 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1269 1270 if (ts->load_cfg_from_disk) 1271 wait_for_completion(&ts->firmware_loading_complete); 1272 1273 return 0; 1274 } 1275 1276 static int __maybe_unused goodix_suspend(struct device *dev) 1277 { 1278 struct i2c_client *client = to_i2c_client(dev); 1279 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1280 int error; 1281 1282 if (ts->load_cfg_from_disk) 1283 wait_for_completion(&ts->firmware_loading_complete); 1284 1285 /* We need gpio pins to suspend/resume */ 1286 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1287 disable_irq(client->irq); 1288 return 0; 1289 } 1290 1291 /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 1292 goodix_free_irq(ts); 1293 1294 /* Save reference (calibration) info if necessary */ 1295 goodix_save_bak_ref(ts); 1296 1297 /* Output LOW on the INT pin for 5 ms */ 1298 error = goodix_irq_direction_output(ts, 0); 1299 if (error) { 1300 goodix_request_irq(ts); 1301 return error; 1302 } 1303 1304 usleep_range(5000, 6000); 1305 1306 error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 1307 GOODIX_CMD_SCREEN_OFF); 1308 if (error) { 1309 goodix_irq_direction_input(ts); 1310 goodix_request_irq(ts); 1311 return -EAGAIN; 1312 } 1313 1314 /* 1315 * The datasheet specifies that the interval between sending screen-off 1316 * command and wake-up should be longer than 58 ms. To avoid waking up 1317 * sooner, delay 58ms here. 1318 */ 1319 msleep(58); 1320 return 0; 1321 } 1322 1323 static int __maybe_unused goodix_resume(struct device *dev) 1324 { 1325 struct i2c_client *client = to_i2c_client(dev); 1326 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1327 u8 config_ver; 1328 int error; 1329 1330 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1331 enable_irq(client->irq); 1332 return 0; 1333 } 1334 1335 /* 1336 * Exit sleep mode by outputting HIGH level to INT pin 1337 * for 2ms~5ms. 1338 */ 1339 error = goodix_irq_direction_output(ts, 1); 1340 if (error) 1341 return error; 1342 1343 usleep_range(2000, 5000); 1344 1345 error = goodix_int_sync(ts); 1346 if (error) 1347 return error; 1348 1349 error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1350 &config_ver, 1); 1351 if (!error && config_ver != ts->config[0]) 1352 dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1353 config_ver, ts->config[0]); 1354 1355 if (error != 0 || config_ver != ts->config[0]) { 1356 error = goodix_reset(ts); 1357 if (error) 1358 return error; 1359 1360 error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1361 if (error) 1362 return error; 1363 } 1364 1365 error = goodix_request_irq(ts); 1366 if (error) 1367 return error; 1368 1369 return 0; 1370 } 1371 1372 static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 1373 1374 static const struct i2c_device_id goodix_ts_id[] = { 1375 { "GDIX1001:00", 0 }, 1376 { } 1377 }; 1378 MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1379 1380 #ifdef CONFIG_ACPI 1381 static const struct acpi_device_id goodix_acpi_match[] = { 1382 { "GDIX1001", 0 }, 1383 { "GDIX1002", 0 }, 1384 { } 1385 }; 1386 MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1387 #endif 1388 1389 #ifdef CONFIG_OF 1390 static const struct of_device_id goodix_of_match[] = { 1391 { .compatible = "goodix,gt1151" }, 1392 { .compatible = "goodix,gt5663" }, 1393 { .compatible = "goodix,gt5688" }, 1394 { .compatible = "goodix,gt911" }, 1395 { .compatible = "goodix,gt9110" }, 1396 { .compatible = "goodix,gt912" }, 1397 { .compatible = "goodix,gt9147" }, 1398 { .compatible = "goodix,gt917s" }, 1399 { .compatible = "goodix,gt927" }, 1400 { .compatible = "goodix,gt9271" }, 1401 { .compatible = "goodix,gt928" }, 1402 { .compatible = "goodix,gt9286" }, 1403 { .compatible = "goodix,gt967" }, 1404 { } 1405 }; 1406 MODULE_DEVICE_TABLE(of, goodix_of_match); 1407 #endif 1408 1409 static struct i2c_driver goodix_ts_driver = { 1410 .probe = goodix_ts_probe, 1411 .remove = goodix_ts_remove, 1412 .id_table = goodix_ts_id, 1413 .driver = { 1414 .name = "Goodix-TS", 1415 .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1416 .of_match_table = of_match_ptr(goodix_of_match), 1417 .pm = &goodix_pm_ops, 1418 }, 1419 }; 1420 module_i2c_driver(goodix_ts_driver); 1421 1422 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1423 MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1424 MODULE_DESCRIPTION("Goodix touchscreen driver"); 1425 MODULE_LICENSE("GPL v2"); 1426