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/gpio/consumer.h> 18 #include <linux/i2c.h> 19 #include <linux/input.h> 20 #include <linux/input/mt.h> 21 #include <linux/input/touchscreen.h> 22 #include <linux/module.h> 23 #include <linux/delay.h> 24 #include <linux/irq.h> 25 #include <linux/interrupt.h> 26 #include <linux/regulator/consumer.h> 27 #include <linux/slab.h> 28 #include <linux/acpi.h> 29 #include <linux/of.h> 30 #include <asm/unaligned.h> 31 32 #define GOODIX_GPIO_INT_NAME "irq" 33 #define GOODIX_GPIO_RST_NAME "reset" 34 35 #define GOODIX_MAX_HEIGHT 4096 36 #define GOODIX_MAX_WIDTH 4096 37 #define GOODIX_INT_TRIGGER 1 38 #define GOODIX_CONTACT_SIZE 8 39 #define GOODIX_MAX_CONTACT_SIZE 9 40 #define GOODIX_MAX_CONTACTS 10 41 #define GOODIX_MAX_KEYS 7 42 43 #define GOODIX_CONFIG_MIN_LENGTH 186 44 #define GOODIX_CONFIG_911_LENGTH 186 45 #define GOODIX_CONFIG_967_LENGTH 228 46 #define GOODIX_CONFIG_GT9X_LENGTH 240 47 #define GOODIX_CONFIG_MAX_LENGTH 240 48 49 /* Register defines */ 50 #define GOODIX_REG_COMMAND 0x8040 51 #define GOODIX_CMD_SCREEN_OFF 0x05 52 53 #define GOODIX_READ_COOR_ADDR 0x814E 54 #define GOODIX_GT1X_REG_CONFIG_DATA 0x8050 55 #define GOODIX_GT9X_REG_CONFIG_DATA 0x8047 56 #define GOODIX_REG_ID 0x8140 57 58 #define GOODIX_BUFFER_STATUS_READY BIT(7) 59 #define GOODIX_HAVE_KEY BIT(4) 60 #define GOODIX_BUFFER_STATUS_TIMEOUT 20 61 62 #define RESOLUTION_LOC 1 63 #define MAX_CONTACTS_LOC 5 64 #define TRIGGER_LOC 6 65 66 /* Our special handling for GPIO accesses through ACPI is x86 specific */ 67 #if defined CONFIG_X86 && defined CONFIG_ACPI 68 #define ACPI_GPIO_SUPPORT 69 #endif 70 71 struct goodix_ts_data; 72 73 enum goodix_irq_pin_access_method { 74 IRQ_PIN_ACCESS_NONE, 75 IRQ_PIN_ACCESS_GPIO, 76 IRQ_PIN_ACCESS_ACPI_GPIO, 77 IRQ_PIN_ACCESS_ACPI_METHOD, 78 }; 79 80 struct goodix_chip_data { 81 u16 config_addr; 82 int config_len; 83 int (*check_config)(struct goodix_ts_data *ts, const u8 *cfg, int len); 84 void (*calc_config_checksum)(struct goodix_ts_data *ts); 85 }; 86 87 struct goodix_chip_id { 88 const char *id; 89 const struct goodix_chip_data *data; 90 }; 91 92 #define GOODIX_ID_MAX_LEN 4 93 94 struct goodix_ts_data { 95 struct i2c_client *client; 96 struct input_dev *input_dev; 97 const struct goodix_chip_data *chip; 98 struct touchscreen_properties prop; 99 unsigned int max_touch_num; 100 unsigned int int_trigger_type; 101 struct regulator *avdd28; 102 struct regulator *vddio; 103 struct gpio_desc *gpiod_int; 104 struct gpio_desc *gpiod_rst; 105 int gpio_count; 106 int gpio_int_idx; 107 char id[GOODIX_ID_MAX_LEN + 1]; 108 u16 version; 109 const char *cfg_name; 110 bool reset_controller_at_probe; 111 bool load_cfg_from_disk; 112 struct completion firmware_loading_complete; 113 unsigned long irq_flags; 114 enum goodix_irq_pin_access_method irq_pin_access_method; 115 unsigned int contact_size; 116 u8 config[GOODIX_CONFIG_MAX_LENGTH]; 117 unsigned short keymap[GOODIX_MAX_KEYS]; 118 }; 119 120 static int goodix_check_cfg_8(struct goodix_ts_data *ts, 121 const u8 *cfg, int len); 122 static int goodix_check_cfg_16(struct goodix_ts_data *ts, 123 const u8 *cfg, int len); 124 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts); 125 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts); 126 127 static const struct goodix_chip_data gt1x_chip_data = { 128 .config_addr = GOODIX_GT1X_REG_CONFIG_DATA, 129 .config_len = GOODIX_CONFIG_GT9X_LENGTH, 130 .check_config = goodix_check_cfg_16, 131 .calc_config_checksum = goodix_calc_cfg_checksum_16, 132 }; 133 134 static const struct goodix_chip_data gt911_chip_data = { 135 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 136 .config_len = GOODIX_CONFIG_911_LENGTH, 137 .check_config = goodix_check_cfg_8, 138 .calc_config_checksum = goodix_calc_cfg_checksum_8, 139 }; 140 141 static const struct goodix_chip_data gt967_chip_data = { 142 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 143 .config_len = GOODIX_CONFIG_967_LENGTH, 144 .check_config = goodix_check_cfg_8, 145 .calc_config_checksum = goodix_calc_cfg_checksum_8, 146 }; 147 148 static const struct goodix_chip_data gt9x_chip_data = { 149 .config_addr = GOODIX_GT9X_REG_CONFIG_DATA, 150 .config_len = GOODIX_CONFIG_GT9X_LENGTH, 151 .check_config = goodix_check_cfg_8, 152 .calc_config_checksum = goodix_calc_cfg_checksum_8, 153 }; 154 155 static const struct goodix_chip_id goodix_chip_ids[] = { 156 { .id = "1151", .data = >1x_chip_data }, 157 { .id = "5663", .data = >1x_chip_data }, 158 { .id = "5688", .data = >1x_chip_data }, 159 { .id = "917S", .data = >1x_chip_data }, 160 { .id = "9286", .data = >1x_chip_data }, 161 162 { .id = "911", .data = >911_chip_data }, 163 { .id = "9271", .data = >911_chip_data }, 164 { .id = "9110", .data = >911_chip_data }, 165 { .id = "927", .data = >911_chip_data }, 166 { .id = "928", .data = >911_chip_data }, 167 168 { .id = "912", .data = >967_chip_data }, 169 { .id = "9147", .data = >967_chip_data }, 170 { .id = "967", .data = >967_chip_data }, 171 { } 172 }; 173 174 static const unsigned long goodix_irq_flags[] = { 175 IRQ_TYPE_EDGE_RISING, 176 IRQ_TYPE_EDGE_FALLING, 177 IRQ_TYPE_LEVEL_LOW, 178 IRQ_TYPE_LEVEL_HIGH, 179 }; 180 181 static const struct dmi_system_id nine_bytes_report[] = { 182 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 183 { 184 .ident = "Lenovo YogaBook", 185 /* YB1-X91L/F and YB1-X90L/F */ 186 .matches = { 187 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9") 188 } 189 }, 190 #endif 191 {} 192 }; 193 194 /* 195 * Those tablets have their x coordinate inverted 196 */ 197 static const struct dmi_system_id inverted_x_screen[] = { 198 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 199 { 200 .ident = "Cube I15-TC", 201 .matches = { 202 DMI_MATCH(DMI_SYS_VENDOR, "Cube"), 203 DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC") 204 }, 205 }, 206 #endif 207 {} 208 }; 209 210 /** 211 * goodix_i2c_read - read data from a register of the i2c slave device. 212 * 213 * @client: i2c device. 214 * @reg: the register to read from. 215 * @buf: raw write data buffer. 216 * @len: length of the buffer to write 217 */ 218 static int goodix_i2c_read(struct i2c_client *client, 219 u16 reg, u8 *buf, int len) 220 { 221 struct i2c_msg msgs[2]; 222 __be16 wbuf = cpu_to_be16(reg); 223 int ret; 224 225 msgs[0].flags = 0; 226 msgs[0].addr = client->addr; 227 msgs[0].len = 2; 228 msgs[0].buf = (u8 *)&wbuf; 229 230 msgs[1].flags = I2C_M_RD; 231 msgs[1].addr = client->addr; 232 msgs[1].len = len; 233 msgs[1].buf = buf; 234 235 ret = i2c_transfer(client->adapter, msgs, 2); 236 return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 237 } 238 239 /** 240 * goodix_i2c_write - write data to a register of the i2c slave device. 241 * 242 * @client: i2c device. 243 * @reg: the register to write to. 244 * @buf: raw data buffer to write. 245 * @len: length of the buffer to write 246 */ 247 static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 248 unsigned len) 249 { 250 u8 *addr_buf; 251 struct i2c_msg msg; 252 int ret; 253 254 addr_buf = kmalloc(len + 2, GFP_KERNEL); 255 if (!addr_buf) 256 return -ENOMEM; 257 258 addr_buf[0] = reg >> 8; 259 addr_buf[1] = reg & 0xFF; 260 memcpy(&addr_buf[2], buf, len); 261 262 msg.flags = 0; 263 msg.addr = client->addr; 264 msg.buf = addr_buf; 265 msg.len = len + 2; 266 267 ret = i2c_transfer(client->adapter, &msg, 1); 268 kfree(addr_buf); 269 return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 270 } 271 272 static int goodix_i2c_write_u8(struct i2c_client *client, u16 reg, u8 value) 273 { 274 return goodix_i2c_write(client, reg, &value, sizeof(value)); 275 } 276 277 static const struct goodix_chip_data *goodix_get_chip_data(const char *id) 278 { 279 unsigned int i; 280 281 for (i = 0; goodix_chip_ids[i].id; i++) { 282 if (!strcmp(goodix_chip_ids[i].id, id)) 283 return goodix_chip_ids[i].data; 284 } 285 286 return >9x_chip_data; 287 } 288 289 static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 290 { 291 unsigned long max_timeout; 292 int touch_num; 293 int error; 294 u16 addr = GOODIX_READ_COOR_ADDR; 295 /* 296 * We are going to read 1-byte header, 297 * ts->contact_size * max(1, touch_num) bytes of coordinates 298 * and 1-byte footer which contains the touch-key code. 299 */ 300 const int header_contact_keycode_size = 1 + ts->contact_size + 1; 301 302 /* 303 * The 'buffer status' bit, which indicates that the data is valid, is 304 * not set as soon as the interrupt is raised, but slightly after. 305 * This takes around 10 ms to happen, so we poll for 20 ms. 306 */ 307 max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT); 308 do { 309 error = goodix_i2c_read(ts->client, addr, data, 310 header_contact_keycode_size); 311 if (error) { 312 dev_err(&ts->client->dev, "I2C transfer error: %d\n", 313 error); 314 return error; 315 } 316 317 if (data[0] & GOODIX_BUFFER_STATUS_READY) { 318 touch_num = data[0] & 0x0f; 319 if (touch_num > ts->max_touch_num) 320 return -EPROTO; 321 322 if (touch_num > 1) { 323 addr += header_contact_keycode_size; 324 data += header_contact_keycode_size; 325 error = goodix_i2c_read(ts->client, 326 addr, data, 327 ts->contact_size * 328 (touch_num - 1)); 329 if (error) 330 return error; 331 } 332 333 return touch_num; 334 } 335 336 usleep_range(1000, 2000); /* Poll every 1 - 2 ms */ 337 } while (time_before(jiffies, max_timeout)); 338 339 /* 340 * The Goodix panel will send spurious interrupts after a 341 * 'finger up' event, which will always cause a timeout. 342 */ 343 return -ENOMSG; 344 } 345 346 static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data) 347 { 348 int id = coor_data[0] & 0x0F; 349 int input_x = get_unaligned_le16(&coor_data[1]); 350 int input_y = get_unaligned_le16(&coor_data[3]); 351 int input_w = get_unaligned_le16(&coor_data[5]); 352 353 input_mt_slot(ts->input_dev, id); 354 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 355 touchscreen_report_pos(ts->input_dev, &ts->prop, 356 input_x, input_y, true); 357 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 358 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 359 } 360 361 static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data) 362 { 363 int id = coor_data[1] & 0x0F; 364 int input_x = get_unaligned_le16(&coor_data[3]); 365 int input_y = get_unaligned_le16(&coor_data[5]); 366 int input_w = get_unaligned_le16(&coor_data[7]); 367 368 input_mt_slot(ts->input_dev, id); 369 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 370 touchscreen_report_pos(ts->input_dev, &ts->prop, 371 input_x, input_y, true); 372 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 373 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 374 } 375 376 static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data) 377 { 378 int touch_num; 379 u8 key_value; 380 int i; 381 382 if (data[0] & GOODIX_HAVE_KEY) { 383 touch_num = data[0] & 0x0f; 384 key_value = data[1 + ts->contact_size * touch_num]; 385 for (i = 0; i < GOODIX_MAX_KEYS; i++) 386 if (key_value & BIT(i)) 387 input_report_key(ts->input_dev, 388 ts->keymap[i], 1); 389 } else { 390 for (i = 0; i < GOODIX_MAX_KEYS; i++) 391 input_report_key(ts->input_dev, ts->keymap[i], 0); 392 } 393 } 394 395 /** 396 * goodix_process_events - Process incoming events 397 * 398 * @ts: our goodix_ts_data pointer 399 * 400 * Called when the IRQ is triggered. Read the current device state, and push 401 * the input events to the user space. 402 */ 403 static void goodix_process_events(struct goodix_ts_data *ts) 404 { 405 u8 point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 406 int touch_num; 407 int i; 408 409 touch_num = goodix_ts_read_input_report(ts, point_data); 410 if (touch_num < 0) 411 return; 412 413 goodix_ts_report_key(ts, point_data); 414 415 for (i = 0; i < touch_num; i++) 416 if (ts->contact_size == 9) 417 goodix_ts_report_touch_9b(ts, 418 &point_data[1 + ts->contact_size * i]); 419 else 420 goodix_ts_report_touch_8b(ts, 421 &point_data[1 + ts->contact_size * i]); 422 423 input_mt_sync_frame(ts->input_dev); 424 input_sync(ts->input_dev); 425 } 426 427 /** 428 * goodix_ts_irq_handler - The IRQ handler 429 * 430 * @irq: interrupt number. 431 * @dev_id: private data pointer. 432 */ 433 static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 434 { 435 struct goodix_ts_data *ts = dev_id; 436 437 goodix_process_events(ts); 438 439 if (goodix_i2c_write_u8(ts->client, GOODIX_READ_COOR_ADDR, 0) < 0) 440 dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 441 442 return IRQ_HANDLED; 443 } 444 445 static void goodix_free_irq(struct goodix_ts_data *ts) 446 { 447 devm_free_irq(&ts->client->dev, ts->client->irq, ts); 448 } 449 450 static int goodix_request_irq(struct goodix_ts_data *ts) 451 { 452 return devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 453 NULL, goodix_ts_irq_handler, 454 ts->irq_flags, ts->client->name, ts); 455 } 456 457 static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len) 458 { 459 int i, raw_cfg_len = len - 2; 460 u8 check_sum = 0; 461 462 for (i = 0; i < raw_cfg_len; i++) 463 check_sum += cfg[i]; 464 check_sum = (~check_sum) + 1; 465 if (check_sum != cfg[raw_cfg_len]) { 466 dev_err(&ts->client->dev, 467 "The checksum of the config fw is not correct"); 468 return -EINVAL; 469 } 470 471 if (cfg[raw_cfg_len + 1] != 1) { 472 dev_err(&ts->client->dev, 473 "Config fw must have Config_Fresh register set"); 474 return -EINVAL; 475 } 476 477 return 0; 478 } 479 480 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts) 481 { 482 int i, raw_cfg_len = ts->chip->config_len - 2; 483 u8 check_sum = 0; 484 485 for (i = 0; i < raw_cfg_len; i++) 486 check_sum += ts->config[i]; 487 check_sum = (~check_sum) + 1; 488 489 ts->config[raw_cfg_len] = check_sum; 490 ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */ 491 } 492 493 static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg, 494 int len) 495 { 496 int i, raw_cfg_len = len - 3; 497 u16 check_sum = 0; 498 499 for (i = 0; i < raw_cfg_len; i += 2) 500 check_sum += get_unaligned_be16(&cfg[i]); 501 check_sum = (~check_sum) + 1; 502 if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) { 503 dev_err(&ts->client->dev, 504 "The checksum of the config fw is not correct"); 505 return -EINVAL; 506 } 507 508 if (cfg[raw_cfg_len + 2] != 1) { 509 dev_err(&ts->client->dev, 510 "Config fw must have Config_Fresh register set"); 511 return -EINVAL; 512 } 513 514 return 0; 515 } 516 517 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts) 518 { 519 int i, raw_cfg_len = ts->chip->config_len - 3; 520 u16 check_sum = 0; 521 522 for (i = 0; i < raw_cfg_len; i += 2) 523 check_sum += get_unaligned_be16(&ts->config[i]); 524 check_sum = (~check_sum) + 1; 525 526 put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]); 527 ts->config[raw_cfg_len + 2] = 1; /* Set "config_fresh" bit */ 528 } 529 530 /** 531 * goodix_check_cfg - Checks if config fw is valid 532 * 533 * @ts: goodix_ts_data pointer 534 * @cfg: firmware config data 535 * @len: config data length 536 */ 537 static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 538 { 539 if (len < GOODIX_CONFIG_MIN_LENGTH || 540 len > GOODIX_CONFIG_MAX_LENGTH) { 541 dev_err(&ts->client->dev, 542 "The length of the config fw is not correct"); 543 return -EINVAL; 544 } 545 546 return ts->chip->check_config(ts, cfg, len); 547 } 548 549 /** 550 * goodix_send_cfg - Write fw config to device 551 * 552 * @ts: goodix_ts_data pointer 553 * @cfg: config firmware to write to device 554 * @len: config data length 555 */ 556 static int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len) 557 { 558 int error; 559 560 error = goodix_check_cfg(ts, cfg, len); 561 if (error) 562 return error; 563 564 error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len); 565 if (error) { 566 dev_err(&ts->client->dev, "Failed to write config data: %d", 567 error); 568 return error; 569 } 570 dev_dbg(&ts->client->dev, "Config sent successfully."); 571 572 /* Let the firmware reconfigure itself, so sleep for 10ms */ 573 usleep_range(10000, 11000); 574 575 return 0; 576 } 577 578 #ifdef ACPI_GPIO_SUPPORT 579 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 580 { 581 acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 582 acpi_status status; 583 584 status = acpi_evaluate_object(handle, "INTI", NULL, NULL); 585 return ACPI_SUCCESS(status) ? 0 : -EIO; 586 } 587 588 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 589 { 590 acpi_handle handle = ACPI_HANDLE(&ts->client->dev); 591 acpi_status status; 592 593 status = acpi_execute_simple_method(handle, "INTO", value); 594 return ACPI_SUCCESS(status) ? 0 : -EIO; 595 } 596 #else 597 static int goodix_pin_acpi_direction_input(struct goodix_ts_data *ts) 598 { 599 dev_err(&ts->client->dev, 600 "%s called on device without ACPI support\n", __func__); 601 return -EINVAL; 602 } 603 604 static int goodix_pin_acpi_output_method(struct goodix_ts_data *ts, int value) 605 { 606 dev_err(&ts->client->dev, 607 "%s called on device without ACPI support\n", __func__); 608 return -EINVAL; 609 } 610 #endif 611 612 static int goodix_irq_direction_output(struct goodix_ts_data *ts, int value) 613 { 614 switch (ts->irq_pin_access_method) { 615 case IRQ_PIN_ACCESS_NONE: 616 dev_err(&ts->client->dev, 617 "%s called without an irq_pin_access_method set\n", 618 __func__); 619 return -EINVAL; 620 case IRQ_PIN_ACCESS_GPIO: 621 return gpiod_direction_output(ts->gpiod_int, value); 622 case IRQ_PIN_ACCESS_ACPI_GPIO: 623 /* 624 * The IRQ pin triggers on a falling edge, so its gets marked 625 * as active-low, use output_raw to avoid the value inversion. 626 */ 627 return gpiod_direction_output_raw(ts->gpiod_int, value); 628 case IRQ_PIN_ACCESS_ACPI_METHOD: 629 return goodix_pin_acpi_output_method(ts, value); 630 } 631 632 return -EINVAL; /* Never reached */ 633 } 634 635 static int goodix_irq_direction_input(struct goodix_ts_data *ts) 636 { 637 switch (ts->irq_pin_access_method) { 638 case IRQ_PIN_ACCESS_NONE: 639 dev_err(&ts->client->dev, 640 "%s called without an irq_pin_access_method set\n", 641 __func__); 642 return -EINVAL; 643 case IRQ_PIN_ACCESS_GPIO: 644 return gpiod_direction_input(ts->gpiod_int); 645 case IRQ_PIN_ACCESS_ACPI_GPIO: 646 return gpiod_direction_input(ts->gpiod_int); 647 case IRQ_PIN_ACCESS_ACPI_METHOD: 648 return goodix_pin_acpi_direction_input(ts); 649 } 650 651 return -EINVAL; /* Never reached */ 652 } 653 654 static int goodix_int_sync(struct goodix_ts_data *ts) 655 { 656 int error; 657 658 error = goodix_irq_direction_output(ts, 0); 659 if (error) 660 return error; 661 662 msleep(50); /* T5: 50ms */ 663 664 error = goodix_irq_direction_input(ts); 665 if (error) 666 return error; 667 668 return 0; 669 } 670 671 /** 672 * goodix_reset - Reset device during power on 673 * 674 * @ts: goodix_ts_data pointer 675 */ 676 static int goodix_reset(struct goodix_ts_data *ts) 677 { 678 int error; 679 680 /* begin select I2C slave addr */ 681 error = gpiod_direction_output(ts->gpiod_rst, 0); 682 if (error) 683 return error; 684 685 msleep(20); /* T2: > 10ms */ 686 687 /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 688 error = goodix_irq_direction_output(ts, ts->client->addr == 0x14); 689 if (error) 690 return error; 691 692 usleep_range(100, 2000); /* T3: > 100us */ 693 694 error = gpiod_direction_output(ts->gpiod_rst, 1); 695 if (error) 696 return error; 697 698 usleep_range(6000, 10000); /* T4: > 5ms */ 699 700 /* end select I2C slave addr */ 701 error = gpiod_direction_input(ts->gpiod_rst); 702 if (error) 703 return error; 704 705 error = goodix_int_sync(ts); 706 if (error) 707 return error; 708 709 return 0; 710 } 711 712 #ifdef ACPI_GPIO_SUPPORT 713 #include <asm/cpu_device_id.h> 714 #include <asm/intel-family.h> 715 716 static const struct x86_cpu_id baytrail_cpu_ids[] = { 717 { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, X86_FEATURE_ANY, }, 718 {} 719 }; 720 721 static inline bool is_byt(void) 722 { 723 const struct x86_cpu_id *id = x86_match_cpu(baytrail_cpu_ids); 724 725 return !!id; 726 } 727 728 static const struct acpi_gpio_params first_gpio = { 0, 0, false }; 729 static const struct acpi_gpio_params second_gpio = { 1, 0, false }; 730 731 static const struct acpi_gpio_mapping acpi_goodix_int_first_gpios[] = { 732 { GOODIX_GPIO_INT_NAME "-gpios", &first_gpio, 1 }, 733 { GOODIX_GPIO_RST_NAME "-gpios", &second_gpio, 1 }, 734 { }, 735 }; 736 737 static const struct acpi_gpio_mapping acpi_goodix_int_last_gpios[] = { 738 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 739 { GOODIX_GPIO_INT_NAME "-gpios", &second_gpio, 1 }, 740 { }, 741 }; 742 743 static const struct acpi_gpio_mapping acpi_goodix_reset_only_gpios[] = { 744 { GOODIX_GPIO_RST_NAME "-gpios", &first_gpio, 1 }, 745 { }, 746 }; 747 748 static int goodix_resource(struct acpi_resource *ares, void *data) 749 { 750 struct goodix_ts_data *ts = data; 751 struct device *dev = &ts->client->dev; 752 struct acpi_resource_gpio *gpio; 753 754 switch (ares->type) { 755 case ACPI_RESOURCE_TYPE_GPIO: 756 gpio = &ares->data.gpio; 757 if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { 758 if (ts->gpio_int_idx == -1) { 759 ts->gpio_int_idx = ts->gpio_count; 760 } else { 761 dev_err(dev, "More then one GpioInt resource, ignoring ACPI GPIO resources\n"); 762 ts->gpio_int_idx = -2; 763 } 764 } 765 ts->gpio_count++; 766 break; 767 default: 768 break; 769 } 770 771 return 0; 772 } 773 774 /* 775 * This function gets called in case we fail to get the irq GPIO directly 776 * because the ACPI tables lack GPIO-name to APCI _CRS index mappings 777 * (no _DSD UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 data). 778 * In that case we add our own mapping and then goodix_get_gpio_config() 779 * retries to get the GPIOs based on the added mapping. 780 */ 781 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 782 { 783 const struct acpi_gpio_mapping *gpio_mapping = NULL; 784 struct device *dev = &ts->client->dev; 785 LIST_HEAD(resources); 786 int ret; 787 788 ts->gpio_count = 0; 789 ts->gpio_int_idx = -1; 790 ret = acpi_dev_get_resources(ACPI_COMPANION(dev), &resources, 791 goodix_resource, ts); 792 if (ret < 0) { 793 dev_err(dev, "Error getting ACPI resources: %d\n", ret); 794 return ret; 795 } 796 797 acpi_dev_free_resource_list(&resources); 798 799 if (ts->gpio_count == 2 && ts->gpio_int_idx == 0) { 800 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 801 gpio_mapping = acpi_goodix_int_first_gpios; 802 } else if (ts->gpio_count == 2 && ts->gpio_int_idx == 1) { 803 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 804 gpio_mapping = acpi_goodix_int_last_gpios; 805 } else if (ts->gpio_count == 1 && ts->gpio_int_idx == -1 && 806 acpi_has_method(ACPI_HANDLE(dev), "INTI") && 807 acpi_has_method(ACPI_HANDLE(dev), "INTO")) { 808 dev_info(dev, "Using ACPI INTI and INTO methods for IRQ pin access\n"); 809 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_METHOD; 810 gpio_mapping = acpi_goodix_reset_only_gpios; 811 } else if (is_byt() && ts->gpio_count == 2 && ts->gpio_int_idx == -1) { 812 dev_info(dev, "No ACPI GpioInt resource, assuming that the GPIO order is reset, int\n"); 813 ts->irq_pin_access_method = IRQ_PIN_ACCESS_ACPI_GPIO; 814 gpio_mapping = acpi_goodix_int_last_gpios; 815 } else { 816 dev_warn(dev, "Unexpected ACPI resources: gpio_count %d, gpio_int_idx %d\n", 817 ts->gpio_count, ts->gpio_int_idx); 818 return -EINVAL; 819 } 820 821 return devm_acpi_dev_add_driver_gpios(dev, gpio_mapping); 822 } 823 #else 824 static int goodix_add_acpi_gpio_mappings(struct goodix_ts_data *ts) 825 { 826 return -EINVAL; 827 } 828 #endif /* CONFIG_X86 && CONFIG_ACPI */ 829 830 /** 831 * goodix_get_gpio_config - Get GPIO config from ACPI/DT 832 * 833 * @ts: goodix_ts_data pointer 834 */ 835 static int goodix_get_gpio_config(struct goodix_ts_data *ts) 836 { 837 int error; 838 struct device *dev; 839 struct gpio_desc *gpiod; 840 bool added_acpi_mappings = false; 841 842 if (!ts->client) 843 return -EINVAL; 844 dev = &ts->client->dev; 845 846 ts->avdd28 = devm_regulator_get(dev, "AVDD28"); 847 if (IS_ERR(ts->avdd28)) { 848 error = PTR_ERR(ts->avdd28); 849 if (error != -EPROBE_DEFER) 850 dev_err(dev, 851 "Failed to get AVDD28 regulator: %d\n", error); 852 return error; 853 } 854 855 ts->vddio = devm_regulator_get(dev, "VDDIO"); 856 if (IS_ERR(ts->vddio)) { 857 error = PTR_ERR(ts->vddio); 858 if (error != -EPROBE_DEFER) 859 dev_err(dev, 860 "Failed to get VDDIO regulator: %d\n", error); 861 return error; 862 } 863 864 retry_get_irq_gpio: 865 /* Get the interrupt GPIO pin number */ 866 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 867 if (IS_ERR(gpiod)) { 868 error = PTR_ERR(gpiod); 869 if (error != -EPROBE_DEFER) 870 dev_dbg(dev, "Failed to get %s GPIO: %d\n", 871 GOODIX_GPIO_INT_NAME, error); 872 return error; 873 } 874 if (!gpiod && has_acpi_companion(dev) && !added_acpi_mappings) { 875 added_acpi_mappings = true; 876 if (goodix_add_acpi_gpio_mappings(ts) == 0) 877 goto retry_get_irq_gpio; 878 } 879 880 ts->gpiod_int = gpiod; 881 882 /* Get the reset line GPIO pin number */ 883 gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 884 if (IS_ERR(gpiod)) { 885 error = PTR_ERR(gpiod); 886 if (error != -EPROBE_DEFER) 887 dev_dbg(dev, "Failed to get %s GPIO: %d\n", 888 GOODIX_GPIO_RST_NAME, error); 889 return error; 890 } 891 892 ts->gpiod_rst = gpiod; 893 894 switch (ts->irq_pin_access_method) { 895 case IRQ_PIN_ACCESS_ACPI_GPIO: 896 /* 897 * We end up here if goodix_add_acpi_gpio_mappings() has 898 * called devm_acpi_dev_add_driver_gpios() because the ACPI 899 * tables did not contain name to index mappings. 900 * Check that we successfully got both GPIOs after we've 901 * added our own acpi_gpio_mapping and if we did not get both 902 * GPIOs reset irq_pin_access_method to IRQ_PIN_ACCESS_NONE. 903 */ 904 if (!ts->gpiod_int || !ts->gpiod_rst) 905 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 906 break; 907 case IRQ_PIN_ACCESS_ACPI_METHOD: 908 if (!ts->gpiod_rst) 909 ts->irq_pin_access_method = IRQ_PIN_ACCESS_NONE; 910 break; 911 default: 912 if (ts->gpiod_int && ts->gpiod_rst) { 913 ts->reset_controller_at_probe = true; 914 ts->load_cfg_from_disk = true; 915 ts->irq_pin_access_method = IRQ_PIN_ACCESS_GPIO; 916 } 917 } 918 919 return 0; 920 } 921 922 /** 923 * goodix_read_config - Read the embedded configuration of the panel 924 * 925 * @ts: our goodix_ts_data pointer 926 * 927 * Must be called during probe 928 */ 929 static void goodix_read_config(struct goodix_ts_data *ts) 930 { 931 int x_max, y_max; 932 int error; 933 934 error = goodix_i2c_read(ts->client, ts->chip->config_addr, 935 ts->config, ts->chip->config_len); 936 if (error) { 937 dev_warn(&ts->client->dev, "Error reading config: %d\n", 938 error); 939 ts->int_trigger_type = GOODIX_INT_TRIGGER; 940 ts->max_touch_num = GOODIX_MAX_CONTACTS; 941 return; 942 } 943 944 ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03; 945 ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f; 946 947 x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]); 948 y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]); 949 if (x_max && y_max) { 950 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1); 951 input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1); 952 } 953 954 ts->chip->calc_config_checksum(ts); 955 } 956 957 /** 958 * goodix_read_version - Read goodix touchscreen version 959 * 960 * @ts: our goodix_ts_data pointer 961 */ 962 static int goodix_read_version(struct goodix_ts_data *ts) 963 { 964 int error; 965 u8 buf[6]; 966 char id_str[GOODIX_ID_MAX_LEN + 1]; 967 968 error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 969 if (error) { 970 dev_err(&ts->client->dev, "read version failed: %d\n", error); 971 return error; 972 } 973 974 memcpy(id_str, buf, GOODIX_ID_MAX_LEN); 975 id_str[GOODIX_ID_MAX_LEN] = 0; 976 strscpy(ts->id, id_str, GOODIX_ID_MAX_LEN + 1); 977 978 ts->version = get_unaligned_le16(&buf[4]); 979 980 dev_info(&ts->client->dev, "ID %s, version: %04x\n", ts->id, 981 ts->version); 982 983 return 0; 984 } 985 986 /** 987 * goodix_i2c_test - I2C test function to check if the device answers. 988 * 989 * @client: the i2c client 990 */ 991 static int goodix_i2c_test(struct i2c_client *client) 992 { 993 int retry = 0; 994 int error; 995 u8 test; 996 997 while (retry++ < 2) { 998 error = goodix_i2c_read(client, GOODIX_REG_ID, 999 &test, 1); 1000 if (!error) 1001 return 0; 1002 1003 dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 1004 retry, error); 1005 msleep(20); 1006 } 1007 1008 return error; 1009 } 1010 1011 /** 1012 * goodix_configure_dev - Finish device initialization 1013 * 1014 * @ts: our goodix_ts_data pointer 1015 * 1016 * Must be called from probe to finish initialization of the device. 1017 * Contains the common initialization code for both devices that 1018 * declare gpio pins and devices that do not. It is either called 1019 * directly from probe or from request_firmware_wait callback. 1020 */ 1021 static int goodix_configure_dev(struct goodix_ts_data *ts) 1022 { 1023 int error; 1024 int i; 1025 1026 ts->int_trigger_type = GOODIX_INT_TRIGGER; 1027 ts->max_touch_num = GOODIX_MAX_CONTACTS; 1028 1029 ts->input_dev = devm_input_allocate_device(&ts->client->dev); 1030 if (!ts->input_dev) { 1031 dev_err(&ts->client->dev, "Failed to allocate input device."); 1032 return -ENOMEM; 1033 } 1034 1035 ts->input_dev->name = "Goodix Capacitive TouchScreen"; 1036 ts->input_dev->phys = "input/ts"; 1037 ts->input_dev->id.bustype = BUS_I2C; 1038 ts->input_dev->id.vendor = 0x0416; 1039 if (kstrtou16(ts->id, 10, &ts->input_dev->id.product)) 1040 ts->input_dev->id.product = 0x1001; 1041 ts->input_dev->id.version = ts->version; 1042 1043 ts->input_dev->keycode = ts->keymap; 1044 ts->input_dev->keycodesize = sizeof(ts->keymap[0]); 1045 ts->input_dev->keycodemax = GOODIX_MAX_KEYS; 1046 1047 /* Capacitive Windows/Home button on some devices */ 1048 for (i = 0; i < GOODIX_MAX_KEYS; ++i) { 1049 if (i == 0) 1050 ts->keymap[i] = KEY_LEFTMETA; 1051 else 1052 ts->keymap[i] = KEY_F1 + (i - 1); 1053 1054 input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]); 1055 } 1056 1057 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X); 1058 input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y); 1059 input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 1060 input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 1061 1062 /* Read configuration and apply touchscreen parameters */ 1063 goodix_read_config(ts); 1064 1065 /* Try overriding touchscreen parameters via device properties */ 1066 touchscreen_parse_properties(ts->input_dev, true, &ts->prop); 1067 1068 if (!ts->prop.max_x || !ts->prop.max_y || !ts->max_touch_num) { 1069 dev_err(&ts->client->dev, 1070 "Invalid config (%d, %d, %d), using defaults\n", 1071 ts->prop.max_x, ts->prop.max_y, ts->max_touch_num); 1072 ts->prop.max_x = GOODIX_MAX_WIDTH - 1; 1073 ts->prop.max_y = GOODIX_MAX_HEIGHT - 1; 1074 ts->max_touch_num = GOODIX_MAX_CONTACTS; 1075 input_abs_set_max(ts->input_dev, 1076 ABS_MT_POSITION_X, ts->prop.max_x); 1077 input_abs_set_max(ts->input_dev, 1078 ABS_MT_POSITION_Y, ts->prop.max_y); 1079 } 1080 1081 if (dmi_check_system(nine_bytes_report)) { 1082 ts->contact_size = 9; 1083 1084 dev_dbg(&ts->client->dev, 1085 "Non-standard 9-bytes report format quirk\n"); 1086 } 1087 1088 if (dmi_check_system(inverted_x_screen)) { 1089 ts->prop.invert_x = true; 1090 dev_dbg(&ts->client->dev, 1091 "Applying 'inverted x screen' quirk\n"); 1092 } 1093 1094 error = input_mt_init_slots(ts->input_dev, ts->max_touch_num, 1095 INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 1096 if (error) { 1097 dev_err(&ts->client->dev, 1098 "Failed to initialize MT slots: %d", error); 1099 return error; 1100 } 1101 1102 error = input_register_device(ts->input_dev); 1103 if (error) { 1104 dev_err(&ts->client->dev, 1105 "Failed to register input device: %d", error); 1106 return error; 1107 } 1108 1109 ts->irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 1110 error = goodix_request_irq(ts); 1111 if (error) { 1112 dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 1113 return error; 1114 } 1115 1116 return 0; 1117 } 1118 1119 /** 1120 * goodix_config_cb - Callback to finish device init 1121 * 1122 * @cfg: firmware config 1123 * @ctx: our goodix_ts_data pointer 1124 * 1125 * request_firmware_wait callback that finishes 1126 * initialization of the device. 1127 */ 1128 static void goodix_config_cb(const struct firmware *cfg, void *ctx) 1129 { 1130 struct goodix_ts_data *ts = ctx; 1131 int error; 1132 1133 if (cfg) { 1134 /* send device configuration to the firmware */ 1135 error = goodix_send_cfg(ts, cfg->data, cfg->size); 1136 if (error) 1137 goto err_release_cfg; 1138 } 1139 1140 goodix_configure_dev(ts); 1141 1142 err_release_cfg: 1143 release_firmware(cfg); 1144 complete_all(&ts->firmware_loading_complete); 1145 } 1146 1147 static void goodix_disable_regulators(void *arg) 1148 { 1149 struct goodix_ts_data *ts = arg; 1150 1151 regulator_disable(ts->vddio); 1152 regulator_disable(ts->avdd28); 1153 } 1154 1155 static int goodix_ts_probe(struct i2c_client *client, 1156 const struct i2c_device_id *id) 1157 { 1158 struct goodix_ts_data *ts; 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 dev_err(&client->dev, "Controller reset failed.\n"); 1210 return error; 1211 } 1212 } 1213 1214 error = goodix_i2c_test(client); 1215 if (error) { 1216 if (!ts->reset_controller_at_probe && 1217 ts->irq_pin_access_method != IRQ_PIN_ACCESS_NONE) { 1218 /* Retry after a controller reset */ 1219 ts->reset_controller_at_probe = true; 1220 goto reset; 1221 } 1222 dev_err(&client->dev, "I2C communication failure: %d\n", error); 1223 return error; 1224 } 1225 1226 error = goodix_read_version(ts); 1227 if (error) { 1228 dev_err(&client->dev, "Read version failed.\n"); 1229 return error; 1230 } 1231 1232 ts->chip = goodix_get_chip_data(ts->id); 1233 1234 if (ts->load_cfg_from_disk) { 1235 /* update device config */ 1236 ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 1237 "goodix_%s_cfg.bin", ts->id); 1238 if (!ts->cfg_name) 1239 return -ENOMEM; 1240 1241 error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 1242 &client->dev, GFP_KERNEL, ts, 1243 goodix_config_cb); 1244 if (error) { 1245 dev_err(&client->dev, 1246 "Failed to invoke firmware loader: %d\n", 1247 error); 1248 return error; 1249 } 1250 1251 return 0; 1252 } else { 1253 error = goodix_configure_dev(ts); 1254 if (error) 1255 return error; 1256 } 1257 1258 return 0; 1259 } 1260 1261 static int goodix_ts_remove(struct i2c_client *client) 1262 { 1263 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1264 1265 if (ts->load_cfg_from_disk) 1266 wait_for_completion(&ts->firmware_loading_complete); 1267 1268 return 0; 1269 } 1270 1271 static int __maybe_unused goodix_suspend(struct device *dev) 1272 { 1273 struct i2c_client *client = to_i2c_client(dev); 1274 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1275 int error; 1276 1277 if (ts->load_cfg_from_disk) 1278 wait_for_completion(&ts->firmware_loading_complete); 1279 1280 /* We need gpio pins to suspend/resume */ 1281 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1282 disable_irq(client->irq); 1283 return 0; 1284 } 1285 1286 /* Free IRQ as IRQ pin is used as output in the suspend sequence */ 1287 goodix_free_irq(ts); 1288 1289 /* Output LOW on the INT pin for 5 ms */ 1290 error = goodix_irq_direction_output(ts, 0); 1291 if (error) { 1292 goodix_request_irq(ts); 1293 return error; 1294 } 1295 1296 usleep_range(5000, 6000); 1297 1298 error = goodix_i2c_write_u8(ts->client, GOODIX_REG_COMMAND, 1299 GOODIX_CMD_SCREEN_OFF); 1300 if (error) { 1301 dev_err(&ts->client->dev, "Screen off command failed\n"); 1302 goodix_irq_direction_input(ts); 1303 goodix_request_irq(ts); 1304 return -EAGAIN; 1305 } 1306 1307 /* 1308 * The datasheet specifies that the interval between sending screen-off 1309 * command and wake-up should be longer than 58 ms. To avoid waking up 1310 * sooner, delay 58ms here. 1311 */ 1312 msleep(58); 1313 return 0; 1314 } 1315 1316 static int __maybe_unused goodix_resume(struct device *dev) 1317 { 1318 struct i2c_client *client = to_i2c_client(dev); 1319 struct goodix_ts_data *ts = i2c_get_clientdata(client); 1320 u8 config_ver; 1321 int error; 1322 1323 if (ts->irq_pin_access_method == IRQ_PIN_ACCESS_NONE) { 1324 enable_irq(client->irq); 1325 return 0; 1326 } 1327 1328 /* 1329 * Exit sleep mode by outputting HIGH level to INT pin 1330 * for 2ms~5ms. 1331 */ 1332 error = goodix_irq_direction_output(ts, 1); 1333 if (error) 1334 return error; 1335 1336 usleep_range(2000, 5000); 1337 1338 error = goodix_int_sync(ts); 1339 if (error) 1340 return error; 1341 1342 error = goodix_i2c_read(ts->client, ts->chip->config_addr, 1343 &config_ver, 1); 1344 if (error) 1345 dev_warn(dev, "Error reading config version: %d, resetting controller\n", 1346 error); 1347 else if (config_ver != ts->config[0]) 1348 dev_info(dev, "Config version mismatch %d != %d, resetting controller\n", 1349 config_ver, ts->config[0]); 1350 1351 if (error != 0 || config_ver != ts->config[0]) { 1352 error = goodix_reset(ts); 1353 if (error) { 1354 dev_err(dev, "Controller reset failed.\n"); 1355 return error; 1356 } 1357 1358 error = goodix_send_cfg(ts, ts->config, ts->chip->config_len); 1359 if (error) 1360 return error; 1361 } 1362 1363 error = goodix_request_irq(ts); 1364 if (error) 1365 return error; 1366 1367 return 0; 1368 } 1369 1370 static SIMPLE_DEV_PM_OPS(goodix_pm_ops, goodix_suspend, goodix_resume); 1371 1372 static const struct i2c_device_id goodix_ts_id[] = { 1373 { "GDIX1001:00", 0 }, 1374 { } 1375 }; 1376 MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 1377 1378 #ifdef CONFIG_ACPI 1379 static const struct acpi_device_id goodix_acpi_match[] = { 1380 { "GDIX1001", 0 }, 1381 { "GDIX1002", 0 }, 1382 { } 1383 }; 1384 MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 1385 #endif 1386 1387 #ifdef CONFIG_OF 1388 static const struct of_device_id goodix_of_match[] = { 1389 { .compatible = "goodix,gt1151" }, 1390 { .compatible = "goodix,gt5663" }, 1391 { .compatible = "goodix,gt5688" }, 1392 { .compatible = "goodix,gt911" }, 1393 { .compatible = "goodix,gt9110" }, 1394 { .compatible = "goodix,gt912" }, 1395 { .compatible = "goodix,gt9147" }, 1396 { .compatible = "goodix,gt917s" }, 1397 { .compatible = "goodix,gt927" }, 1398 { .compatible = "goodix,gt9271" }, 1399 { .compatible = "goodix,gt928" }, 1400 { .compatible = "goodix,gt9286" }, 1401 { .compatible = "goodix,gt967" }, 1402 { } 1403 }; 1404 MODULE_DEVICE_TABLE(of, goodix_of_match); 1405 #endif 1406 1407 static struct i2c_driver goodix_ts_driver = { 1408 .probe = goodix_ts_probe, 1409 .remove = goodix_ts_remove, 1410 .id_table = goodix_ts_id, 1411 .driver = { 1412 .name = "Goodix-TS", 1413 .acpi_match_table = ACPI_PTR(goodix_acpi_match), 1414 .of_match_table = of_match_ptr(goodix_of_match), 1415 .pm = &goodix_pm_ops, 1416 }, 1417 }; 1418 module_i2c_driver(goodix_ts_driver); 1419 1420 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 1421 MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 1422 MODULE_DESCRIPTION("Goodix touchscreen driver"); 1423 MODULE_LICENSE("GPL v2"); 1424