1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de> 4 * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support) 5 * Lothar Waßmann <LW@KARO-electronics.de> (DT support) 6 */ 7 8 /* 9 * This is a driver for the EDT "Polytouch" family of touch controllers 10 * based on the FocalTech FT5x06 line of chips. 11 * 12 * Development of this driver has been sponsored by Glyn: 13 * http://www.glyn.com/Products/Displays 14 */ 15 16 #include <linux/debugfs.h> 17 #include <linux/delay.h> 18 #include <linux/gpio/consumer.h> 19 #include <linux/i2c.h> 20 #include <linux/interrupt.h> 21 #include <linux/input.h> 22 #include <linux/input/mt.h> 23 #include <linux/input/touchscreen.h> 24 #include <linux/irq.h> 25 #include <linux/kernel.h> 26 #include <linux/module.h> 27 #include <linux/ratelimit.h> 28 #include <linux/regulator/consumer.h> 29 #include <linux/slab.h> 30 #include <linux/uaccess.h> 31 32 #include <asm/unaligned.h> 33 34 #define WORK_REGISTER_THRESHOLD 0x00 35 #define WORK_REGISTER_REPORT_RATE 0x08 36 #define WORK_REGISTER_GAIN 0x30 37 #define WORK_REGISTER_OFFSET 0x31 38 #define WORK_REGISTER_NUM_X 0x33 39 #define WORK_REGISTER_NUM_Y 0x34 40 41 #define PMOD_REGISTER_ACTIVE 0x00 42 #define PMOD_REGISTER_HIBERNATE 0x03 43 44 #define M09_REGISTER_THRESHOLD 0x80 45 #define M09_REGISTER_GAIN 0x92 46 #define M09_REGISTER_OFFSET 0x93 47 #define M09_REGISTER_NUM_X 0x94 48 #define M09_REGISTER_NUM_Y 0x95 49 50 #define EV_REGISTER_THRESHOLD 0x40 51 #define EV_REGISTER_GAIN 0x41 52 #define EV_REGISTER_OFFSET_Y 0x45 53 #define EV_REGISTER_OFFSET_X 0x46 54 55 #define NO_REGISTER 0xff 56 57 #define WORK_REGISTER_OPMODE 0x3c 58 #define FACTORY_REGISTER_OPMODE 0x01 59 #define PMOD_REGISTER_OPMODE 0xa5 60 61 #define TOUCH_EVENT_DOWN 0x00 62 #define TOUCH_EVENT_UP 0x01 63 #define TOUCH_EVENT_ON 0x02 64 #define TOUCH_EVENT_RESERVED 0x03 65 66 #define EDT_NAME_LEN 23 67 #define EDT_SWITCH_MODE_RETRIES 10 68 #define EDT_SWITCH_MODE_DELAY 5 /* msec */ 69 #define EDT_RAW_DATA_RETRIES 100 70 #define EDT_RAW_DATA_DELAY 1000 /* usec */ 71 72 #define EDT_DEFAULT_NUM_X 1024 73 #define EDT_DEFAULT_NUM_Y 1024 74 75 enum edt_pmode { 76 EDT_PMODE_NOT_SUPPORTED, 77 EDT_PMODE_HIBERNATE, 78 EDT_PMODE_POWEROFF, 79 }; 80 81 enum edt_ver { 82 EDT_M06, 83 EDT_M09, 84 EDT_M12, 85 EV_FT, 86 GENERIC_FT, 87 }; 88 89 struct edt_reg_addr { 90 int reg_threshold; 91 int reg_report_rate; 92 int reg_gain; 93 int reg_offset; 94 int reg_offset_x; 95 int reg_offset_y; 96 int reg_num_x; 97 int reg_num_y; 98 }; 99 100 struct edt_ft5x06_ts_data { 101 struct i2c_client *client; 102 struct input_dev *input; 103 struct touchscreen_properties prop; 104 u16 num_x; 105 u16 num_y; 106 struct regulator *vcc; 107 108 struct gpio_desc *reset_gpio; 109 struct gpio_desc *wake_gpio; 110 111 #if defined(CONFIG_DEBUG_FS) 112 struct dentry *debug_dir; 113 u8 *raw_buffer; 114 size_t raw_bufsize; 115 #endif 116 117 struct mutex mutex; 118 bool factory_mode; 119 enum edt_pmode suspend_mode; 120 int threshold; 121 int gain; 122 int offset; 123 int offset_x; 124 int offset_y; 125 int report_rate; 126 int max_support_points; 127 128 char name[EDT_NAME_LEN]; 129 130 struct edt_reg_addr reg_addr; 131 enum edt_ver version; 132 }; 133 134 struct edt_i2c_chip_data { 135 int max_support_points; 136 }; 137 138 static int edt_ft5x06_ts_readwrite(struct i2c_client *client, 139 u16 wr_len, u8 *wr_buf, 140 u16 rd_len, u8 *rd_buf) 141 { 142 struct i2c_msg wrmsg[2]; 143 int i = 0; 144 int ret; 145 146 if (wr_len) { 147 wrmsg[i].addr = client->addr; 148 wrmsg[i].flags = 0; 149 wrmsg[i].len = wr_len; 150 wrmsg[i].buf = wr_buf; 151 i++; 152 } 153 if (rd_len) { 154 wrmsg[i].addr = client->addr; 155 wrmsg[i].flags = I2C_M_RD; 156 wrmsg[i].len = rd_len; 157 wrmsg[i].buf = rd_buf; 158 i++; 159 } 160 161 ret = i2c_transfer(client->adapter, wrmsg, i); 162 if (ret < 0) 163 return ret; 164 if (ret != i) 165 return -EIO; 166 167 return 0; 168 } 169 170 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata, 171 u8 *buf, int buflen) 172 { 173 int i; 174 u8 crc = 0; 175 176 for (i = 0; i < buflen - 1; i++) 177 crc ^= buf[i]; 178 179 if (crc != buf[buflen-1]) { 180 dev_err_ratelimited(&tsdata->client->dev, 181 "crc error: 0x%02x expected, got 0x%02x\n", 182 crc, buf[buflen-1]); 183 return false; 184 } 185 186 return true; 187 } 188 189 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) 190 { 191 struct edt_ft5x06_ts_data *tsdata = dev_id; 192 struct device *dev = &tsdata->client->dev; 193 u8 cmd; 194 u8 rdbuf[63]; 195 int i, type, x, y, id; 196 int offset, tplen, datalen, crclen; 197 int error; 198 199 switch (tsdata->version) { 200 case EDT_M06: 201 cmd = 0xf9; /* tell the controller to send touch data */ 202 offset = 5; /* where the actual touch data starts */ 203 tplen = 4; /* data comes in so called frames */ 204 crclen = 1; /* length of the crc data */ 205 break; 206 207 case EDT_M09: 208 case EDT_M12: 209 case EV_FT: 210 case GENERIC_FT: 211 cmd = 0x0; 212 offset = 3; 213 tplen = 6; 214 crclen = 0; 215 break; 216 217 default: 218 goto out; 219 } 220 221 memset(rdbuf, 0, sizeof(rdbuf)); 222 datalen = tplen * tsdata->max_support_points + offset + crclen; 223 224 error = edt_ft5x06_ts_readwrite(tsdata->client, 225 sizeof(cmd), &cmd, 226 datalen, rdbuf); 227 if (error) { 228 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", 229 error); 230 goto out; 231 } 232 233 /* M09/M12 does not send header or CRC */ 234 if (tsdata->version == EDT_M06) { 235 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || 236 rdbuf[2] != datalen) { 237 dev_err_ratelimited(dev, 238 "Unexpected header: %02x%02x%02x!\n", 239 rdbuf[0], rdbuf[1], rdbuf[2]); 240 goto out; 241 } 242 243 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen)) 244 goto out; 245 } 246 247 for (i = 0; i < tsdata->max_support_points; i++) { 248 u8 *buf = &rdbuf[i * tplen + offset]; 249 250 type = buf[0] >> 6; 251 /* ignore Reserved events */ 252 if (type == TOUCH_EVENT_RESERVED) 253 continue; 254 255 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */ 256 if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN) 257 continue; 258 259 x = get_unaligned_be16(buf) & 0x0fff; 260 y = get_unaligned_be16(buf + 2) & 0x0fff; 261 /* The FT5x26 send the y coordinate first */ 262 if (tsdata->version == EV_FT) 263 swap(x, y); 264 265 id = (buf[2] >> 4) & 0x0f; 266 267 input_mt_slot(tsdata->input, id); 268 if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, 269 type != TOUCH_EVENT_UP)) 270 touchscreen_report_pos(tsdata->input, &tsdata->prop, 271 x, y, true); 272 } 273 274 input_mt_report_pointer_emulation(tsdata->input, true); 275 input_sync(tsdata->input); 276 277 out: 278 return IRQ_HANDLED; 279 } 280 281 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata, 282 u8 addr, u8 value) 283 { 284 u8 wrbuf[4]; 285 286 switch (tsdata->version) { 287 case EDT_M06: 288 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; 289 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; 290 wrbuf[2] = value; 291 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2]; 292 return edt_ft5x06_ts_readwrite(tsdata->client, 4, 293 wrbuf, 0, NULL); 294 295 case EDT_M09: 296 case EDT_M12: 297 case EV_FT: 298 case GENERIC_FT: 299 wrbuf[0] = addr; 300 wrbuf[1] = value; 301 302 return edt_ft5x06_ts_readwrite(tsdata->client, 2, 303 wrbuf, 0, NULL); 304 305 default: 306 return -EINVAL; 307 } 308 } 309 310 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata, 311 u8 addr) 312 { 313 u8 wrbuf[2], rdbuf[2]; 314 int error; 315 316 switch (tsdata->version) { 317 case EDT_M06: 318 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; 319 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; 320 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40; 321 322 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, 323 rdbuf); 324 if (error) 325 return error; 326 327 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) { 328 dev_err(&tsdata->client->dev, 329 "crc error: 0x%02x expected, got 0x%02x\n", 330 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], 331 rdbuf[1]); 332 return -EIO; 333 } 334 break; 335 336 case EDT_M09: 337 case EDT_M12: 338 case EV_FT: 339 case GENERIC_FT: 340 wrbuf[0] = addr; 341 error = edt_ft5x06_ts_readwrite(tsdata->client, 1, 342 wrbuf, 1, rdbuf); 343 if (error) 344 return error; 345 break; 346 347 default: 348 return -EINVAL; 349 } 350 351 return rdbuf[0]; 352 } 353 354 struct edt_ft5x06_attribute { 355 struct device_attribute dattr; 356 size_t field_offset; 357 u8 limit_low; 358 u8 limit_high; 359 u8 addr_m06; 360 u8 addr_m09; 361 u8 addr_ev; 362 }; 363 364 #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev, \ 365 _limit_low, _limit_high) \ 366 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \ 367 .dattr = __ATTR(_field, _mode, \ 368 edt_ft5x06_setting_show, \ 369 edt_ft5x06_setting_store), \ 370 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \ 371 .addr_m06 = _addr_m06, \ 372 .addr_m09 = _addr_m09, \ 373 .addr_ev = _addr_ev, \ 374 .limit_low = _limit_low, \ 375 .limit_high = _limit_high, \ 376 } 377 378 static ssize_t edt_ft5x06_setting_show(struct device *dev, 379 struct device_attribute *dattr, 380 char *buf) 381 { 382 struct i2c_client *client = to_i2c_client(dev); 383 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 384 struct edt_ft5x06_attribute *attr = 385 container_of(dattr, struct edt_ft5x06_attribute, dattr); 386 u8 *field = (u8 *)tsdata + attr->field_offset; 387 int val; 388 size_t count = 0; 389 int error = 0; 390 u8 addr; 391 392 mutex_lock(&tsdata->mutex); 393 394 if (tsdata->factory_mode) { 395 error = -EIO; 396 goto out; 397 } 398 399 switch (tsdata->version) { 400 case EDT_M06: 401 addr = attr->addr_m06; 402 break; 403 404 case EDT_M09: 405 case EDT_M12: 406 case GENERIC_FT: 407 addr = attr->addr_m09; 408 break; 409 410 case EV_FT: 411 addr = attr->addr_ev; 412 break; 413 414 default: 415 error = -ENODEV; 416 goto out; 417 } 418 419 if (addr != NO_REGISTER) { 420 val = edt_ft5x06_register_read(tsdata, addr); 421 if (val < 0) { 422 error = val; 423 dev_err(&tsdata->client->dev, 424 "Failed to fetch attribute %s, error %d\n", 425 dattr->attr.name, error); 426 goto out; 427 } 428 } else { 429 val = *field; 430 } 431 432 if (val != *field) { 433 dev_warn(&tsdata->client->dev, 434 "%s: read (%d) and stored value (%d) differ\n", 435 dattr->attr.name, val, *field); 436 *field = val; 437 } 438 439 count = scnprintf(buf, PAGE_SIZE, "%d\n", val); 440 out: 441 mutex_unlock(&tsdata->mutex); 442 return error ?: count; 443 } 444 445 static ssize_t edt_ft5x06_setting_store(struct device *dev, 446 struct device_attribute *dattr, 447 const char *buf, size_t count) 448 { 449 struct i2c_client *client = to_i2c_client(dev); 450 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 451 struct edt_ft5x06_attribute *attr = 452 container_of(dattr, struct edt_ft5x06_attribute, dattr); 453 u8 *field = (u8 *)tsdata + attr->field_offset; 454 unsigned int val; 455 int error; 456 u8 addr; 457 458 mutex_lock(&tsdata->mutex); 459 460 if (tsdata->factory_mode) { 461 error = -EIO; 462 goto out; 463 } 464 465 error = kstrtouint(buf, 0, &val); 466 if (error) 467 goto out; 468 469 if (val < attr->limit_low || val > attr->limit_high) { 470 error = -ERANGE; 471 goto out; 472 } 473 474 switch (tsdata->version) { 475 case EDT_M06: 476 addr = attr->addr_m06; 477 break; 478 479 case EDT_M09: 480 case EDT_M12: 481 case GENERIC_FT: 482 addr = attr->addr_m09; 483 break; 484 485 case EV_FT: 486 addr = attr->addr_ev; 487 break; 488 489 default: 490 error = -ENODEV; 491 goto out; 492 } 493 494 if (addr != NO_REGISTER) { 495 error = edt_ft5x06_register_write(tsdata, addr, val); 496 if (error) { 497 dev_err(&tsdata->client->dev, 498 "Failed to update attribute %s, error: %d\n", 499 dattr->attr.name, error); 500 goto out; 501 } 502 } 503 *field = val; 504 505 out: 506 mutex_unlock(&tsdata->mutex); 507 return error ?: count; 508 } 509 510 /* m06, m09: range 0-31, m12: range 0-5 */ 511 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 512 M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31); 513 /* m06, m09: range 0-31, m12: range 0-16 */ 514 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 515 M09_REGISTER_OFFSET, NO_REGISTER, 0, 31); 516 /* m06, m09, m12: no supported, ev_ft: range 0-80 */ 517 static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, 518 EV_REGISTER_OFFSET_X, 0, 80); 519 /* m06, m09, m12: no supported, ev_ft: range 0-80 */ 520 static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, 521 EV_REGISTER_OFFSET_Y, 0, 80); 522 /* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */ 523 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD, 524 M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255); 525 /* m06: range 3 to 14, m12: (0x64: 100Hz) */ 526 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE, 527 NO_REGISTER, NO_REGISTER, 0, 255); 528 529 static struct attribute *edt_ft5x06_attrs[] = { 530 &edt_ft5x06_attr_gain.dattr.attr, 531 &edt_ft5x06_attr_offset.dattr.attr, 532 &edt_ft5x06_attr_offset_x.dattr.attr, 533 &edt_ft5x06_attr_offset_y.dattr.attr, 534 &edt_ft5x06_attr_threshold.dattr.attr, 535 &edt_ft5x06_attr_report_rate.dattr.attr, 536 NULL 537 }; 538 539 static const struct attribute_group edt_ft5x06_attr_group = { 540 .attrs = edt_ft5x06_attrs, 541 }; 542 543 static void edt_ft5x06_restore_reg_parameters(struct edt_ft5x06_ts_data *tsdata) 544 { 545 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 546 547 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, 548 tsdata->threshold); 549 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, 550 tsdata->gain); 551 if (reg_addr->reg_offset != NO_REGISTER) 552 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, 553 tsdata->offset); 554 if (reg_addr->reg_offset_x != NO_REGISTER) 555 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_x, 556 tsdata->offset_x); 557 if (reg_addr->reg_offset_y != NO_REGISTER) 558 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_y, 559 tsdata->offset_y); 560 if (reg_addr->reg_report_rate != NO_REGISTER) 561 edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate, 562 tsdata->report_rate); 563 564 } 565 566 #ifdef CONFIG_DEBUG_FS 567 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) 568 { 569 struct i2c_client *client = tsdata->client; 570 int retries = EDT_SWITCH_MODE_RETRIES; 571 int ret; 572 int error; 573 574 if (tsdata->version != EDT_M06) { 575 dev_err(&client->dev, 576 "No factory mode support for non-M06 devices\n"); 577 return -EINVAL; 578 } 579 580 disable_irq(client->irq); 581 582 if (!tsdata->raw_buffer) { 583 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y * 584 sizeof(u16); 585 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL); 586 if (!tsdata->raw_buffer) { 587 error = -ENOMEM; 588 goto err_out; 589 } 590 } 591 592 /* mode register is 0x3c when in the work mode */ 593 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03); 594 if (error) { 595 dev_err(&client->dev, 596 "failed to switch to factory mode, error %d\n", error); 597 goto err_out; 598 } 599 600 tsdata->factory_mode = true; 601 do { 602 mdelay(EDT_SWITCH_MODE_DELAY); 603 /* mode register is 0x01 when in factory mode */ 604 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE); 605 if (ret == 0x03) 606 break; 607 } while (--retries > 0); 608 609 if (retries == 0) { 610 dev_err(&client->dev, "not in factory mode after %dms.\n", 611 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); 612 error = -EIO; 613 goto err_out; 614 } 615 616 return 0; 617 618 err_out: 619 kfree(tsdata->raw_buffer); 620 tsdata->raw_buffer = NULL; 621 tsdata->factory_mode = false; 622 enable_irq(client->irq); 623 624 return error; 625 } 626 627 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata) 628 { 629 struct i2c_client *client = tsdata->client; 630 int retries = EDT_SWITCH_MODE_RETRIES; 631 int ret; 632 int error; 633 634 /* mode register is 0x01 when in the factory mode */ 635 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1); 636 if (error) { 637 dev_err(&client->dev, 638 "failed to switch to work mode, error: %d\n", error); 639 return error; 640 } 641 642 tsdata->factory_mode = false; 643 644 do { 645 mdelay(EDT_SWITCH_MODE_DELAY); 646 /* mode register is 0x01 when in factory mode */ 647 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE); 648 if (ret == 0x01) 649 break; 650 } while (--retries > 0); 651 652 if (retries == 0) { 653 dev_err(&client->dev, "not in work mode after %dms.\n", 654 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); 655 tsdata->factory_mode = true; 656 return -EIO; 657 } 658 659 kfree(tsdata->raw_buffer); 660 tsdata->raw_buffer = NULL; 661 662 edt_ft5x06_restore_reg_parameters(tsdata); 663 enable_irq(client->irq); 664 665 return 0; 666 } 667 668 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode) 669 { 670 struct edt_ft5x06_ts_data *tsdata = data; 671 672 *mode = tsdata->factory_mode; 673 674 return 0; 675 }; 676 677 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode) 678 { 679 struct edt_ft5x06_ts_data *tsdata = data; 680 int retval = 0; 681 682 if (mode > 1) 683 return -ERANGE; 684 685 mutex_lock(&tsdata->mutex); 686 687 if (mode != tsdata->factory_mode) { 688 retval = mode ? edt_ft5x06_factory_mode(tsdata) : 689 edt_ft5x06_work_mode(tsdata); 690 } 691 692 mutex_unlock(&tsdata->mutex); 693 694 return retval; 695 }; 696 697 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get, 698 edt_ft5x06_debugfs_mode_set, "%llu\n"); 699 700 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file, 701 char __user *buf, size_t count, loff_t *off) 702 { 703 struct edt_ft5x06_ts_data *tsdata = file->private_data; 704 struct i2c_client *client = tsdata->client; 705 int retries = EDT_RAW_DATA_RETRIES; 706 int val, i, error; 707 size_t read = 0; 708 int colbytes; 709 char wrbuf[3]; 710 u8 *rdbuf; 711 712 if (*off < 0 || *off >= tsdata->raw_bufsize) 713 return 0; 714 715 mutex_lock(&tsdata->mutex); 716 717 if (!tsdata->factory_mode || !tsdata->raw_buffer) { 718 error = -EIO; 719 goto out; 720 } 721 722 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01); 723 if (error) { 724 dev_dbg(&client->dev, 725 "failed to write 0x08 register, error %d\n", error); 726 goto out; 727 } 728 729 do { 730 usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100); 731 val = edt_ft5x06_register_read(tsdata, 0x08); 732 if (val < 1) 733 break; 734 } while (--retries > 0); 735 736 if (val < 0) { 737 error = val; 738 dev_dbg(&client->dev, 739 "failed to read 0x08 register, error %d\n", error); 740 goto out; 741 } 742 743 if (retries == 0) { 744 dev_dbg(&client->dev, 745 "timed out waiting for register to settle\n"); 746 error = -ETIMEDOUT; 747 goto out; 748 } 749 750 rdbuf = tsdata->raw_buffer; 751 colbytes = tsdata->num_y * sizeof(u16); 752 753 wrbuf[0] = 0xf5; 754 wrbuf[1] = 0x0e; 755 for (i = 0; i < tsdata->num_x; i++) { 756 wrbuf[2] = i; /* column index */ 757 error = edt_ft5x06_ts_readwrite(tsdata->client, 758 sizeof(wrbuf), wrbuf, 759 colbytes, rdbuf); 760 if (error) 761 goto out; 762 763 rdbuf += colbytes; 764 } 765 766 read = min_t(size_t, count, tsdata->raw_bufsize - *off); 767 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) { 768 error = -EFAULT; 769 goto out; 770 } 771 772 *off += read; 773 out: 774 mutex_unlock(&tsdata->mutex); 775 return error ?: read; 776 }; 777 778 static const struct file_operations debugfs_raw_data_fops = { 779 .open = simple_open, 780 .read = edt_ft5x06_debugfs_raw_data_read, 781 }; 782 783 static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, 784 const char *debugfs_name) 785 { 786 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL); 787 788 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x); 789 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y); 790 791 debugfs_create_file("mode", S_IRUSR | S_IWUSR, 792 tsdata->debug_dir, tsdata, &debugfs_mode_fops); 793 debugfs_create_file("raw_data", S_IRUSR, 794 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops); 795 } 796 797 static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) 798 { 799 debugfs_remove_recursive(tsdata->debug_dir); 800 kfree(tsdata->raw_buffer); 801 } 802 803 #else 804 805 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) 806 { 807 return -ENOSYS; 808 } 809 810 static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, 811 const char *debugfs_name) 812 { 813 } 814 815 static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) 816 { 817 } 818 819 #endif /* CONFIG_DEBUGFS */ 820 821 static int edt_ft5x06_ts_identify(struct i2c_client *client, 822 struct edt_ft5x06_ts_data *tsdata, 823 char *fw_version) 824 { 825 u8 rdbuf[EDT_NAME_LEN]; 826 char *p; 827 int error; 828 char *model_name = tsdata->name; 829 830 /* see what we find if we assume it is a M06 * 831 * if we get less than EDT_NAME_LEN, we don't want 832 * to have garbage in there 833 */ 834 memset(rdbuf, 0, sizeof(rdbuf)); 835 error = edt_ft5x06_ts_readwrite(client, 1, "\xBB", 836 EDT_NAME_LEN - 1, rdbuf); 837 if (error) 838 return error; 839 840 /* Probe content for something consistent. 841 * M06 starts with a response byte, M12 gives the data directly. 842 * M09/Generic does not provide model number information. 843 */ 844 if (!strncasecmp(rdbuf + 1, "EP0", 3)) { 845 tsdata->version = EDT_M06; 846 847 /* remove last '$' end marker */ 848 rdbuf[EDT_NAME_LEN - 1] = '\0'; 849 if (rdbuf[EDT_NAME_LEN - 2] == '$') 850 rdbuf[EDT_NAME_LEN - 2] = '\0'; 851 852 /* look for Model/Version separator */ 853 p = strchr(rdbuf, '*'); 854 if (p) 855 *p++ = '\0'; 856 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN); 857 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); 858 } else if (!strncasecmp(rdbuf, "EP0", 3)) { 859 tsdata->version = EDT_M12; 860 861 /* remove last '$' end marker */ 862 rdbuf[EDT_NAME_LEN - 2] = '\0'; 863 if (rdbuf[EDT_NAME_LEN - 3] == '$') 864 rdbuf[EDT_NAME_LEN - 3] = '\0'; 865 866 /* look for Model/Version separator */ 867 p = strchr(rdbuf, '*'); 868 if (p) 869 *p++ = '\0'; 870 strlcpy(model_name, rdbuf, EDT_NAME_LEN); 871 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); 872 } else { 873 /* If it is not an EDT M06/M12 touchscreen, then the model 874 * detection is a bit hairy. The different ft5x06 875 * firmares around don't reliably implement the 876 * identification registers. Well, we'll take a shot. 877 * 878 * The main difference between generic focaltec based 879 * touches and EDT M09 is that we know how to retrieve 880 * the max coordinates for the latter. 881 */ 882 tsdata->version = GENERIC_FT; 883 884 error = edt_ft5x06_ts_readwrite(client, 1, "\xA6", 885 2, rdbuf); 886 if (error) 887 return error; 888 889 strlcpy(fw_version, rdbuf, 2); 890 891 error = edt_ft5x06_ts_readwrite(client, 1, "\xA8", 892 1, rdbuf); 893 if (error) 894 return error; 895 896 /* This "model identification" is not exact. Unfortunately 897 * not all firmwares for the ft5x06 put useful values in 898 * the identification registers. 899 */ 900 switch (rdbuf[0]) { 901 case 0x35: /* EDT EP0350M09 */ 902 case 0x43: /* EDT EP0430M09 */ 903 case 0x50: /* EDT EP0500M09 */ 904 case 0x57: /* EDT EP0570M09 */ 905 case 0x70: /* EDT EP0700M09 */ 906 tsdata->version = EDT_M09; 907 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09", 908 rdbuf[0] >> 4, rdbuf[0] & 0x0F); 909 break; 910 case 0xa1: /* EDT EP1010ML00 */ 911 tsdata->version = EDT_M09; 912 snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00", 913 rdbuf[0] >> 4, rdbuf[0] & 0x0F); 914 break; 915 case 0x5a: /* Solomon Goldentek Display */ 916 snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0"); 917 break; 918 case 0x59: /* Evervision Display with FT5xx6 TS */ 919 tsdata->version = EV_FT; 920 error = edt_ft5x06_ts_readwrite(client, 1, "\x53", 921 1, rdbuf); 922 if (error) 923 return error; 924 strlcpy(fw_version, rdbuf, 1); 925 snprintf(model_name, EDT_NAME_LEN, 926 "EVERVISION-FT5726NEi"); 927 break; 928 default: 929 snprintf(model_name, EDT_NAME_LEN, 930 "generic ft5x06 (%02x)", 931 rdbuf[0]); 932 break; 933 } 934 } 935 936 return 0; 937 } 938 939 static void edt_ft5x06_ts_get_defaults(struct device *dev, 940 struct edt_ft5x06_ts_data *tsdata) 941 { 942 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 943 u32 val; 944 int error; 945 946 error = device_property_read_u32(dev, "threshold", &val); 947 if (!error) { 948 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, val); 949 tsdata->threshold = val; 950 } 951 952 error = device_property_read_u32(dev, "gain", &val); 953 if (!error) { 954 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, val); 955 tsdata->gain = val; 956 } 957 958 error = device_property_read_u32(dev, "offset", &val); 959 if (!error) { 960 if (reg_addr->reg_offset != NO_REGISTER) 961 edt_ft5x06_register_write(tsdata, 962 reg_addr->reg_offset, val); 963 tsdata->offset = val; 964 } 965 966 error = device_property_read_u32(dev, "offset-x", &val); 967 if (!error) { 968 if (reg_addr->reg_offset_x != NO_REGISTER) 969 edt_ft5x06_register_write(tsdata, 970 reg_addr->reg_offset_x, val); 971 tsdata->offset_x = val; 972 } 973 974 error = device_property_read_u32(dev, "offset-y", &val); 975 if (!error) { 976 if (reg_addr->reg_offset_y != NO_REGISTER) 977 edt_ft5x06_register_write(tsdata, 978 reg_addr->reg_offset_y, val); 979 tsdata->offset_y = val; 980 } 981 } 982 983 static void edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata) 984 { 985 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 986 987 tsdata->threshold = edt_ft5x06_register_read(tsdata, 988 reg_addr->reg_threshold); 989 tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain); 990 if (reg_addr->reg_offset != NO_REGISTER) 991 tsdata->offset = 992 edt_ft5x06_register_read(tsdata, reg_addr->reg_offset); 993 if (reg_addr->reg_offset_x != NO_REGISTER) 994 tsdata->offset_x = edt_ft5x06_register_read(tsdata, 995 reg_addr->reg_offset_x); 996 if (reg_addr->reg_offset_y != NO_REGISTER) 997 tsdata->offset_y = edt_ft5x06_register_read(tsdata, 998 reg_addr->reg_offset_y); 999 if (reg_addr->reg_report_rate != NO_REGISTER) 1000 tsdata->report_rate = edt_ft5x06_register_read(tsdata, 1001 reg_addr->reg_report_rate); 1002 tsdata->num_x = EDT_DEFAULT_NUM_X; 1003 if (reg_addr->reg_num_x != NO_REGISTER) 1004 tsdata->num_x = edt_ft5x06_register_read(tsdata, 1005 reg_addr->reg_num_x); 1006 tsdata->num_y = EDT_DEFAULT_NUM_Y; 1007 if (reg_addr->reg_num_y != NO_REGISTER) 1008 tsdata->num_y = edt_ft5x06_register_read(tsdata, 1009 reg_addr->reg_num_y); 1010 } 1011 1012 static void edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) 1013 { 1014 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 1015 1016 switch (tsdata->version) { 1017 case EDT_M06: 1018 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD; 1019 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE; 1020 reg_addr->reg_gain = WORK_REGISTER_GAIN; 1021 reg_addr->reg_offset = WORK_REGISTER_OFFSET; 1022 reg_addr->reg_offset_x = NO_REGISTER; 1023 reg_addr->reg_offset_y = NO_REGISTER; 1024 reg_addr->reg_num_x = WORK_REGISTER_NUM_X; 1025 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y; 1026 break; 1027 1028 case EDT_M09: 1029 case EDT_M12: 1030 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; 1031 reg_addr->reg_report_rate = NO_REGISTER; 1032 reg_addr->reg_gain = M09_REGISTER_GAIN; 1033 reg_addr->reg_offset = M09_REGISTER_OFFSET; 1034 reg_addr->reg_offset_x = NO_REGISTER; 1035 reg_addr->reg_offset_y = NO_REGISTER; 1036 reg_addr->reg_num_x = M09_REGISTER_NUM_X; 1037 reg_addr->reg_num_y = M09_REGISTER_NUM_Y; 1038 break; 1039 1040 case EV_FT: 1041 reg_addr->reg_threshold = EV_REGISTER_THRESHOLD; 1042 reg_addr->reg_report_rate = NO_REGISTER; 1043 reg_addr->reg_gain = EV_REGISTER_GAIN; 1044 reg_addr->reg_offset = NO_REGISTER; 1045 reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X; 1046 reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y; 1047 reg_addr->reg_num_x = NO_REGISTER; 1048 reg_addr->reg_num_y = NO_REGISTER; 1049 break; 1050 1051 case GENERIC_FT: 1052 /* this is a guesswork */ 1053 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; 1054 reg_addr->reg_report_rate = NO_REGISTER; 1055 reg_addr->reg_gain = M09_REGISTER_GAIN; 1056 reg_addr->reg_offset = M09_REGISTER_OFFSET; 1057 reg_addr->reg_offset_x = NO_REGISTER; 1058 reg_addr->reg_offset_y = NO_REGISTER; 1059 reg_addr->reg_num_x = NO_REGISTER; 1060 reg_addr->reg_num_y = NO_REGISTER; 1061 break; 1062 } 1063 } 1064 1065 static void edt_ft5x06_disable_regulator(void *arg) 1066 { 1067 struct edt_ft5x06_ts_data *data = arg; 1068 1069 regulator_disable(data->vcc); 1070 } 1071 1072 static int edt_ft5x06_ts_probe(struct i2c_client *client, 1073 const struct i2c_device_id *id) 1074 { 1075 const struct edt_i2c_chip_data *chip_data; 1076 struct edt_ft5x06_ts_data *tsdata; 1077 u8 buf[2] = { 0xfc, 0x00 }; 1078 struct input_dev *input; 1079 unsigned long irq_flags; 1080 int error; 1081 char fw_version[EDT_NAME_LEN]; 1082 1083 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); 1084 1085 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL); 1086 if (!tsdata) { 1087 dev_err(&client->dev, "failed to allocate driver data.\n"); 1088 return -ENOMEM; 1089 } 1090 1091 chip_data = device_get_match_data(&client->dev); 1092 if (!chip_data) 1093 chip_data = (const struct edt_i2c_chip_data *)id->driver_data; 1094 if (!chip_data || !chip_data->max_support_points) { 1095 dev_err(&client->dev, "invalid or missing chip data\n"); 1096 return -EINVAL; 1097 } 1098 1099 tsdata->max_support_points = chip_data->max_support_points; 1100 1101 tsdata->vcc = devm_regulator_get(&client->dev, "vcc"); 1102 if (IS_ERR(tsdata->vcc)) { 1103 error = PTR_ERR(tsdata->vcc); 1104 if (error != -EPROBE_DEFER) 1105 dev_err(&client->dev, 1106 "failed to request regulator: %d\n", error); 1107 return error; 1108 } 1109 1110 error = regulator_enable(tsdata->vcc); 1111 if (error < 0) { 1112 dev_err(&client->dev, "failed to enable vcc: %d\n", error); 1113 return error; 1114 } 1115 1116 error = devm_add_action_or_reset(&client->dev, 1117 edt_ft5x06_disable_regulator, 1118 tsdata); 1119 if (error) 1120 return error; 1121 1122 tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev, 1123 "reset", GPIOD_OUT_HIGH); 1124 if (IS_ERR(tsdata->reset_gpio)) { 1125 error = PTR_ERR(tsdata->reset_gpio); 1126 dev_err(&client->dev, 1127 "Failed to request GPIO reset pin, error %d\n", error); 1128 return error; 1129 } 1130 1131 tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev, 1132 "wake", GPIOD_OUT_LOW); 1133 if (IS_ERR(tsdata->wake_gpio)) { 1134 error = PTR_ERR(tsdata->wake_gpio); 1135 dev_err(&client->dev, 1136 "Failed to request GPIO wake pin, error %d\n", error); 1137 return error; 1138 } 1139 1140 /* 1141 * Check which sleep modes we can support. Power-off requieres the 1142 * reset-pin to ensure correct power-down/power-up behaviour. Start with 1143 * the EDT_PMODE_POWEROFF test since this is the deepest possible sleep 1144 * mode. 1145 */ 1146 if (tsdata->reset_gpio) 1147 tsdata->suspend_mode = EDT_PMODE_POWEROFF; 1148 else if (tsdata->wake_gpio) 1149 tsdata->suspend_mode = EDT_PMODE_HIBERNATE; 1150 else 1151 tsdata->suspend_mode = EDT_PMODE_NOT_SUPPORTED; 1152 1153 if (tsdata->wake_gpio) { 1154 usleep_range(5000, 6000); 1155 gpiod_set_value_cansleep(tsdata->wake_gpio, 1); 1156 } 1157 1158 if (tsdata->reset_gpio) { 1159 usleep_range(5000, 6000); 1160 gpiod_set_value_cansleep(tsdata->reset_gpio, 0); 1161 msleep(300); 1162 } 1163 1164 input = devm_input_allocate_device(&client->dev); 1165 if (!input) { 1166 dev_err(&client->dev, "failed to allocate input device.\n"); 1167 return -ENOMEM; 1168 } 1169 1170 mutex_init(&tsdata->mutex); 1171 tsdata->client = client; 1172 tsdata->input = input; 1173 tsdata->factory_mode = false; 1174 1175 error = edt_ft5x06_ts_identify(client, tsdata, fw_version); 1176 if (error) { 1177 dev_err(&client->dev, "touchscreen probe failed\n"); 1178 return error; 1179 } 1180 1181 /* 1182 * Dummy read access. EP0700MLP1 returns bogus data on the first 1183 * register read access and ignores writes. 1184 */ 1185 edt_ft5x06_ts_readwrite(tsdata->client, 2, buf, 2, buf); 1186 1187 edt_ft5x06_ts_set_regs(tsdata); 1188 edt_ft5x06_ts_get_defaults(&client->dev, tsdata); 1189 edt_ft5x06_ts_get_parameters(tsdata); 1190 1191 dev_dbg(&client->dev, 1192 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n", 1193 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y); 1194 1195 input->name = tsdata->name; 1196 input->id.bustype = BUS_I2C; 1197 input->dev.parent = &client->dev; 1198 1199 input_set_abs_params(input, ABS_MT_POSITION_X, 1200 0, tsdata->num_x * 64 - 1, 0, 0); 1201 input_set_abs_params(input, ABS_MT_POSITION_Y, 1202 0, tsdata->num_y * 64 - 1, 0, 0); 1203 1204 touchscreen_parse_properties(input, true, &tsdata->prop); 1205 1206 error = input_mt_init_slots(input, tsdata->max_support_points, 1207 INPUT_MT_DIRECT); 1208 if (error) { 1209 dev_err(&client->dev, "Unable to init MT slots.\n"); 1210 return error; 1211 } 1212 1213 i2c_set_clientdata(client, tsdata); 1214 1215 irq_flags = irq_get_trigger_type(client->irq); 1216 if (irq_flags == IRQF_TRIGGER_NONE) 1217 irq_flags = IRQF_TRIGGER_FALLING; 1218 irq_flags |= IRQF_ONESHOT; 1219 1220 error = devm_request_threaded_irq(&client->dev, client->irq, 1221 NULL, edt_ft5x06_ts_isr, irq_flags, 1222 client->name, tsdata); 1223 if (error) { 1224 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); 1225 return error; 1226 } 1227 1228 error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group); 1229 if (error) 1230 return error; 1231 1232 error = input_register_device(input); 1233 if (error) 1234 return error; 1235 1236 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev)); 1237 1238 dev_dbg(&client->dev, 1239 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", 1240 client->irq, 1241 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1, 1242 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1); 1243 1244 return 0; 1245 } 1246 1247 static int edt_ft5x06_ts_remove(struct i2c_client *client) 1248 { 1249 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1250 1251 edt_ft5x06_ts_teardown_debugfs(tsdata); 1252 1253 return 0; 1254 } 1255 1256 static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev) 1257 { 1258 struct i2c_client *client = to_i2c_client(dev); 1259 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1260 struct gpio_desc *reset_gpio = tsdata->reset_gpio; 1261 int ret; 1262 1263 if (device_may_wakeup(dev)) 1264 return 0; 1265 1266 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) 1267 return 0; 1268 1269 /* Enter hibernate mode. */ 1270 ret = edt_ft5x06_register_write(tsdata, PMOD_REGISTER_OPMODE, 1271 PMOD_REGISTER_HIBERNATE); 1272 if (ret) 1273 dev_warn(dev, "Failed to set hibernate mode\n"); 1274 1275 if (tsdata->suspend_mode == EDT_PMODE_HIBERNATE) 1276 return 0; 1277 1278 /* 1279 * Power-off according the datasheet. Cut the power may leaf the irq 1280 * line in an undefined state depending on the host pull resistor 1281 * settings. Disable the irq to avoid adjusting each host till the 1282 * device is back in a full functional state. 1283 */ 1284 disable_irq(tsdata->client->irq); 1285 1286 gpiod_set_value_cansleep(reset_gpio, 1); 1287 usleep_range(1000, 2000); 1288 1289 ret = regulator_disable(tsdata->vcc); 1290 if (ret) 1291 dev_warn(dev, "Failed to disable vcc\n"); 1292 1293 return 0; 1294 } 1295 1296 static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev) 1297 { 1298 struct i2c_client *client = to_i2c_client(dev); 1299 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1300 int ret = 0; 1301 1302 if (device_may_wakeup(dev)) 1303 return 0; 1304 1305 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) 1306 return 0; 1307 1308 if (tsdata->suspend_mode == EDT_PMODE_POWEROFF) { 1309 struct gpio_desc *reset_gpio = tsdata->reset_gpio; 1310 1311 /* 1312 * We can't check if the regulator is a dummy or a real 1313 * regulator. So we need to specify the 5ms reset time (T_rst) 1314 * here instead of the 100us T_rtp time. We also need to wait 1315 * 300ms in case it was a real supply and the power was cutted 1316 * of. Toggle the reset pin is also a way to exit the hibernate 1317 * mode. 1318 */ 1319 gpiod_set_value_cansleep(reset_gpio, 1); 1320 usleep_range(5000, 6000); 1321 1322 ret = regulator_enable(tsdata->vcc); 1323 if (ret) { 1324 dev_err(dev, "Failed to enable vcc\n"); 1325 return ret; 1326 } 1327 1328 usleep_range(1000, 2000); 1329 gpiod_set_value_cansleep(reset_gpio, 0); 1330 msleep(300); 1331 1332 edt_ft5x06_restore_reg_parameters(tsdata); 1333 enable_irq(tsdata->client->irq); 1334 1335 if (tsdata->factory_mode) 1336 ret = edt_ft5x06_factory_mode(tsdata); 1337 } else { 1338 struct gpio_desc *wake_gpio = tsdata->wake_gpio; 1339 1340 gpiod_set_value_cansleep(wake_gpio, 0); 1341 usleep_range(5000, 6000); 1342 gpiod_set_value_cansleep(wake_gpio, 1); 1343 } 1344 1345 1346 return ret; 1347 } 1348 1349 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, 1350 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); 1351 1352 static const struct edt_i2c_chip_data edt_ft5x06_data = { 1353 .max_support_points = 5, 1354 }; 1355 1356 static const struct edt_i2c_chip_data edt_ft5506_data = { 1357 .max_support_points = 10, 1358 }; 1359 1360 static const struct edt_i2c_chip_data edt_ft6236_data = { 1361 .max_support_points = 2, 1362 }; 1363 1364 static const struct i2c_device_id edt_ft5x06_ts_id[] = { 1365 { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data }, 1366 { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data }, 1367 { .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data }, 1368 /* Note no edt- prefix for compatibility with the ft6236.c driver */ 1369 { .name = "ft6236", .driver_data = (long)&edt_ft6236_data }, 1370 { /* sentinel */ } 1371 }; 1372 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); 1373 1374 static const struct of_device_id edt_ft5x06_of_match[] = { 1375 { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data }, 1376 { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data }, 1377 { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data }, 1378 { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data }, 1379 { .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data }, 1380 /* Note focaltech vendor prefix for compatibility with ft6236.c */ 1381 { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data }, 1382 { /* sentinel */ } 1383 }; 1384 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match); 1385 1386 static struct i2c_driver edt_ft5x06_ts_driver = { 1387 .driver = { 1388 .name = "edt_ft5x06", 1389 .of_match_table = edt_ft5x06_of_match, 1390 .pm = &edt_ft5x06_ts_pm_ops, 1391 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1392 }, 1393 .id_table = edt_ft5x06_ts_id, 1394 .probe = edt_ft5x06_ts_probe, 1395 .remove = edt_ft5x06_ts_remove, 1396 }; 1397 1398 module_i2c_driver(edt_ft5x06_ts_driver); 1399 1400 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>"); 1401 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver"); 1402 MODULE_LICENSE("GPL v2"); 1403