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 enum edt_pmode { 73 EDT_PMODE_NOT_SUPPORTED, 74 EDT_PMODE_HIBERNATE, 75 EDT_PMODE_POWEROFF, 76 }; 77 78 enum edt_ver { 79 EDT_M06, 80 EDT_M09, 81 EDT_M12, 82 EV_FT, 83 GENERIC_FT, 84 }; 85 86 struct edt_reg_addr { 87 int reg_threshold; 88 int reg_report_rate; 89 int reg_gain; 90 int reg_offset; 91 int reg_offset_x; 92 int reg_offset_y; 93 int reg_num_x; 94 int reg_num_y; 95 }; 96 97 struct edt_ft5x06_ts_data { 98 struct i2c_client *client; 99 struct input_dev *input; 100 struct touchscreen_properties prop; 101 u16 num_x; 102 u16 num_y; 103 struct regulator *vcc; 104 105 struct gpio_desc *reset_gpio; 106 struct gpio_desc *wake_gpio; 107 108 #if defined(CONFIG_DEBUG_FS) 109 struct dentry *debug_dir; 110 u8 *raw_buffer; 111 size_t raw_bufsize; 112 #endif 113 114 struct mutex mutex; 115 bool factory_mode; 116 enum edt_pmode suspend_mode; 117 int threshold; 118 int gain; 119 int offset; 120 int offset_x; 121 int offset_y; 122 int report_rate; 123 int max_support_points; 124 125 char name[EDT_NAME_LEN]; 126 127 struct edt_reg_addr reg_addr; 128 enum edt_ver version; 129 }; 130 131 struct edt_i2c_chip_data { 132 int max_support_points; 133 }; 134 135 static int edt_ft5x06_ts_readwrite(struct i2c_client *client, 136 u16 wr_len, u8 *wr_buf, 137 u16 rd_len, u8 *rd_buf) 138 { 139 struct i2c_msg wrmsg[2]; 140 int i = 0; 141 int ret; 142 143 if (wr_len) { 144 wrmsg[i].addr = client->addr; 145 wrmsg[i].flags = 0; 146 wrmsg[i].len = wr_len; 147 wrmsg[i].buf = wr_buf; 148 i++; 149 } 150 if (rd_len) { 151 wrmsg[i].addr = client->addr; 152 wrmsg[i].flags = I2C_M_RD; 153 wrmsg[i].len = rd_len; 154 wrmsg[i].buf = rd_buf; 155 i++; 156 } 157 158 ret = i2c_transfer(client->adapter, wrmsg, i); 159 if (ret < 0) 160 return ret; 161 if (ret != i) 162 return -EIO; 163 164 return 0; 165 } 166 167 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata, 168 u8 *buf, int buflen) 169 { 170 int i; 171 u8 crc = 0; 172 173 for (i = 0; i < buflen - 1; i++) 174 crc ^= buf[i]; 175 176 if (crc != buf[buflen-1]) { 177 dev_err_ratelimited(&tsdata->client->dev, 178 "crc error: 0x%02x expected, got 0x%02x\n", 179 crc, buf[buflen-1]); 180 return false; 181 } 182 183 return true; 184 } 185 186 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) 187 { 188 struct edt_ft5x06_ts_data *tsdata = dev_id; 189 struct device *dev = &tsdata->client->dev; 190 u8 cmd; 191 u8 rdbuf[63]; 192 int i, type, x, y, id; 193 int offset, tplen, datalen, crclen; 194 int error; 195 196 switch (tsdata->version) { 197 case EDT_M06: 198 cmd = 0xf9; /* tell the controller to send touch data */ 199 offset = 5; /* where the actual touch data starts */ 200 tplen = 4; /* data comes in so called frames */ 201 crclen = 1; /* length of the crc data */ 202 break; 203 204 case EDT_M09: 205 case EDT_M12: 206 case EV_FT: 207 case GENERIC_FT: 208 cmd = 0x0; 209 offset = 3; 210 tplen = 6; 211 crclen = 0; 212 break; 213 214 default: 215 goto out; 216 } 217 218 memset(rdbuf, 0, sizeof(rdbuf)); 219 datalen = tplen * tsdata->max_support_points + offset + crclen; 220 221 error = edt_ft5x06_ts_readwrite(tsdata->client, 222 sizeof(cmd), &cmd, 223 datalen, rdbuf); 224 if (error) { 225 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", 226 error); 227 goto out; 228 } 229 230 /* M09/M12 does not send header or CRC */ 231 if (tsdata->version == EDT_M06) { 232 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || 233 rdbuf[2] != datalen) { 234 dev_err_ratelimited(dev, 235 "Unexpected header: %02x%02x%02x!\n", 236 rdbuf[0], rdbuf[1], rdbuf[2]); 237 goto out; 238 } 239 240 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen)) 241 goto out; 242 } 243 244 for (i = 0; i < tsdata->max_support_points; i++) { 245 u8 *buf = &rdbuf[i * tplen + offset]; 246 247 type = buf[0] >> 6; 248 /* ignore Reserved events */ 249 if (type == TOUCH_EVENT_RESERVED) 250 continue; 251 252 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */ 253 if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN) 254 continue; 255 256 x = get_unaligned_be16(buf) & 0x0fff; 257 y = get_unaligned_be16(buf + 2) & 0x0fff; 258 /* The FT5x26 send the y coordinate first */ 259 if (tsdata->version == EV_FT) 260 swap(x, y); 261 262 id = (buf[2] >> 4) & 0x0f; 263 264 input_mt_slot(tsdata->input, id); 265 if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, 266 type != TOUCH_EVENT_UP)) 267 touchscreen_report_pos(tsdata->input, &tsdata->prop, 268 x, y, true); 269 } 270 271 input_mt_report_pointer_emulation(tsdata->input, true); 272 input_sync(tsdata->input); 273 274 out: 275 return IRQ_HANDLED; 276 } 277 278 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata, 279 u8 addr, u8 value) 280 { 281 u8 wrbuf[4]; 282 283 switch (tsdata->version) { 284 case EDT_M06: 285 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; 286 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; 287 wrbuf[2] = value; 288 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2]; 289 return edt_ft5x06_ts_readwrite(tsdata->client, 4, 290 wrbuf, 0, NULL); 291 /* fallthrough */ 292 case EDT_M09: 293 case EDT_M12: 294 case EV_FT: 295 case GENERIC_FT: 296 wrbuf[0] = addr; 297 wrbuf[1] = value; 298 299 return edt_ft5x06_ts_readwrite(tsdata->client, 2, 300 wrbuf, 0, NULL); 301 302 default: 303 return -EINVAL; 304 } 305 } 306 307 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata, 308 u8 addr) 309 { 310 u8 wrbuf[2], rdbuf[2]; 311 int error; 312 313 switch (tsdata->version) { 314 case EDT_M06: 315 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; 316 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; 317 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40; 318 319 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, 320 rdbuf); 321 if (error) 322 return error; 323 324 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) { 325 dev_err(&tsdata->client->dev, 326 "crc error: 0x%02x expected, got 0x%02x\n", 327 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], 328 rdbuf[1]); 329 return -EIO; 330 } 331 break; 332 333 /* fallthrough */ 334 case EDT_M09: 335 case EDT_M12: 336 case EV_FT: 337 case GENERIC_FT: 338 wrbuf[0] = addr; 339 error = edt_ft5x06_ts_readwrite(tsdata->client, 1, 340 wrbuf, 1, rdbuf); 341 if (error) 342 return error; 343 break; 344 345 default: 346 return -EINVAL; 347 } 348 349 return rdbuf[0]; 350 } 351 352 struct edt_ft5x06_attribute { 353 struct device_attribute dattr; 354 size_t field_offset; 355 u8 limit_low; 356 u8 limit_high; 357 u8 addr_m06; 358 u8 addr_m09; 359 u8 addr_ev; 360 }; 361 362 #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev, \ 363 _limit_low, _limit_high) \ 364 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \ 365 .dattr = __ATTR(_field, _mode, \ 366 edt_ft5x06_setting_show, \ 367 edt_ft5x06_setting_store), \ 368 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \ 369 .addr_m06 = _addr_m06, \ 370 .addr_m09 = _addr_m09, \ 371 .addr_ev = _addr_ev, \ 372 .limit_low = _limit_low, \ 373 .limit_high = _limit_high, \ 374 } 375 376 static ssize_t edt_ft5x06_setting_show(struct device *dev, 377 struct device_attribute *dattr, 378 char *buf) 379 { 380 struct i2c_client *client = to_i2c_client(dev); 381 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 382 struct edt_ft5x06_attribute *attr = 383 container_of(dattr, struct edt_ft5x06_attribute, dattr); 384 u8 *field = (u8 *)tsdata + attr->field_offset; 385 int val; 386 size_t count = 0; 387 int error = 0; 388 u8 addr; 389 390 mutex_lock(&tsdata->mutex); 391 392 if (tsdata->factory_mode) { 393 error = -EIO; 394 goto out; 395 } 396 397 switch (tsdata->version) { 398 case EDT_M06: 399 addr = attr->addr_m06; 400 break; 401 402 case EDT_M09: 403 case EDT_M12: 404 case GENERIC_FT: 405 addr = attr->addr_m09; 406 break; 407 408 case EV_FT: 409 addr = attr->addr_ev; 410 break; 411 412 default: 413 error = -ENODEV; 414 goto out; 415 } 416 417 if (addr != NO_REGISTER) { 418 val = edt_ft5x06_register_read(tsdata, addr); 419 if (val < 0) { 420 error = val; 421 dev_err(&tsdata->client->dev, 422 "Failed to fetch attribute %s, error %d\n", 423 dattr->attr.name, error); 424 goto out; 425 } 426 } else { 427 val = *field; 428 } 429 430 if (val != *field) { 431 dev_warn(&tsdata->client->dev, 432 "%s: read (%d) and stored value (%d) differ\n", 433 dattr->attr.name, val, *field); 434 *field = val; 435 } 436 437 count = scnprintf(buf, PAGE_SIZE, "%d\n", val); 438 out: 439 mutex_unlock(&tsdata->mutex); 440 return error ?: count; 441 } 442 443 static ssize_t edt_ft5x06_setting_store(struct device *dev, 444 struct device_attribute *dattr, 445 const char *buf, size_t count) 446 { 447 struct i2c_client *client = to_i2c_client(dev); 448 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 449 struct edt_ft5x06_attribute *attr = 450 container_of(dattr, struct edt_ft5x06_attribute, dattr); 451 u8 *field = (u8 *)tsdata + attr->field_offset; 452 unsigned int val; 453 int error; 454 u8 addr; 455 456 mutex_lock(&tsdata->mutex); 457 458 if (tsdata->factory_mode) { 459 error = -EIO; 460 goto out; 461 } 462 463 error = kstrtouint(buf, 0, &val); 464 if (error) 465 goto out; 466 467 if (val < attr->limit_low || val > attr->limit_high) { 468 error = -ERANGE; 469 goto out; 470 } 471 472 switch (tsdata->version) { 473 case EDT_M06: 474 addr = attr->addr_m06; 475 break; 476 477 case EDT_M09: 478 case EDT_M12: 479 case GENERIC_FT: 480 addr = attr->addr_m09; 481 break; 482 483 case EV_FT: 484 addr = attr->addr_ev; 485 break; 486 487 default: 488 error = -ENODEV; 489 goto out; 490 } 491 492 if (addr != NO_REGISTER) { 493 error = edt_ft5x06_register_write(tsdata, addr, val); 494 if (error) { 495 dev_err(&tsdata->client->dev, 496 "Failed to update attribute %s, error: %d\n", 497 dattr->attr.name, error); 498 goto out; 499 } 500 } 501 *field = val; 502 503 out: 504 mutex_unlock(&tsdata->mutex); 505 return error ?: count; 506 } 507 508 /* m06, m09: range 0-31, m12: range 0-5 */ 509 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 510 M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31); 511 /* m06, m09: range 0-31, m12: range 0-16 */ 512 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 513 M09_REGISTER_OFFSET, NO_REGISTER, 0, 31); 514 /* m06, m09, m12: no supported, ev_ft: range 0-80 */ 515 static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, 516 EV_REGISTER_OFFSET_X, 0, 80); 517 /* m06, m09, m12: no supported, ev_ft: range 0-80 */ 518 static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, 519 EV_REGISTER_OFFSET_Y, 0, 80); 520 /* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */ 521 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD, 522 M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255); 523 /* m06: range 3 to 14, m12: (0x64: 100Hz) */ 524 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE, 525 NO_REGISTER, NO_REGISTER, 0, 255); 526 527 static struct attribute *edt_ft5x06_attrs[] = { 528 &edt_ft5x06_attr_gain.dattr.attr, 529 &edt_ft5x06_attr_offset.dattr.attr, 530 &edt_ft5x06_attr_offset_x.dattr.attr, 531 &edt_ft5x06_attr_offset_y.dattr.attr, 532 &edt_ft5x06_attr_threshold.dattr.attr, 533 &edt_ft5x06_attr_report_rate.dattr.attr, 534 NULL 535 }; 536 537 static const struct attribute_group edt_ft5x06_attr_group = { 538 .attrs = edt_ft5x06_attrs, 539 }; 540 541 static void edt_ft5x06_restore_reg_parameters(struct edt_ft5x06_ts_data *tsdata) 542 { 543 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 544 545 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, 546 tsdata->threshold); 547 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, 548 tsdata->gain); 549 if (reg_addr->reg_offset != NO_REGISTER) 550 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, 551 tsdata->offset); 552 if (reg_addr->reg_offset_x != NO_REGISTER) 553 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_x, 554 tsdata->offset_x); 555 if (reg_addr->reg_offset_y != NO_REGISTER) 556 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_y, 557 tsdata->offset_y); 558 if (reg_addr->reg_report_rate != NO_REGISTER) 559 edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate, 560 tsdata->report_rate); 561 562 } 563 564 #ifdef CONFIG_DEBUG_FS 565 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) 566 { 567 struct i2c_client *client = tsdata->client; 568 int retries = EDT_SWITCH_MODE_RETRIES; 569 int ret; 570 int error; 571 572 if (tsdata->version != EDT_M06) { 573 dev_err(&client->dev, 574 "No factory mode support for non-M06 devices\n"); 575 return -EINVAL; 576 } 577 578 disable_irq(client->irq); 579 580 if (!tsdata->raw_buffer) { 581 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y * 582 sizeof(u16); 583 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL); 584 if (!tsdata->raw_buffer) { 585 error = -ENOMEM; 586 goto err_out; 587 } 588 } 589 590 /* mode register is 0x3c when in the work mode */ 591 error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03); 592 if (error) { 593 dev_err(&client->dev, 594 "failed to switch to factory mode, error %d\n", error); 595 goto err_out; 596 } 597 598 tsdata->factory_mode = true; 599 do { 600 mdelay(EDT_SWITCH_MODE_DELAY); 601 /* mode register is 0x01 when in factory mode */ 602 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE); 603 if (ret == 0x03) 604 break; 605 } while (--retries > 0); 606 607 if (retries == 0) { 608 dev_err(&client->dev, "not in factory mode after %dms.\n", 609 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); 610 error = -EIO; 611 goto err_out; 612 } 613 614 return 0; 615 616 err_out: 617 kfree(tsdata->raw_buffer); 618 tsdata->raw_buffer = NULL; 619 tsdata->factory_mode = false; 620 enable_irq(client->irq); 621 622 return error; 623 } 624 625 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata) 626 { 627 struct i2c_client *client = tsdata->client; 628 int retries = EDT_SWITCH_MODE_RETRIES; 629 int ret; 630 int error; 631 632 /* mode register is 0x01 when in the factory mode */ 633 error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1); 634 if (error) { 635 dev_err(&client->dev, 636 "failed to switch to work mode, error: %d\n", error); 637 return error; 638 } 639 640 tsdata->factory_mode = false; 641 642 do { 643 mdelay(EDT_SWITCH_MODE_DELAY); 644 /* mode register is 0x01 when in factory mode */ 645 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE); 646 if (ret == 0x01) 647 break; 648 } while (--retries > 0); 649 650 if (retries == 0) { 651 dev_err(&client->dev, "not in work mode after %dms.\n", 652 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); 653 tsdata->factory_mode = true; 654 return -EIO; 655 } 656 657 kfree(tsdata->raw_buffer); 658 tsdata->raw_buffer = NULL; 659 660 edt_ft5x06_restore_reg_parameters(tsdata); 661 enable_irq(client->irq); 662 663 return 0; 664 } 665 666 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode) 667 { 668 struct edt_ft5x06_ts_data *tsdata = data; 669 670 *mode = tsdata->factory_mode; 671 672 return 0; 673 }; 674 675 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode) 676 { 677 struct edt_ft5x06_ts_data *tsdata = data; 678 int retval = 0; 679 680 if (mode > 1) 681 return -ERANGE; 682 683 mutex_lock(&tsdata->mutex); 684 685 if (mode != tsdata->factory_mode) { 686 retval = mode ? edt_ft5x06_factory_mode(tsdata) : 687 edt_ft5x06_work_mode(tsdata); 688 } 689 690 mutex_unlock(&tsdata->mutex); 691 692 return retval; 693 }; 694 695 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get, 696 edt_ft5x06_debugfs_mode_set, "%llu\n"); 697 698 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file, 699 char __user *buf, size_t count, loff_t *off) 700 { 701 struct edt_ft5x06_ts_data *tsdata = file->private_data; 702 struct i2c_client *client = tsdata->client; 703 int retries = EDT_RAW_DATA_RETRIES; 704 int val, i, error; 705 size_t read = 0; 706 int colbytes; 707 char wrbuf[3]; 708 u8 *rdbuf; 709 710 if (*off < 0 || *off >= tsdata->raw_bufsize) 711 return 0; 712 713 mutex_lock(&tsdata->mutex); 714 715 if (!tsdata->factory_mode || !tsdata->raw_buffer) { 716 error = -EIO; 717 goto out; 718 } 719 720 error = edt_ft5x06_register_write(tsdata, 0x08, 0x01); 721 if (error) { 722 dev_dbg(&client->dev, 723 "failed to write 0x08 register, error %d\n", error); 724 goto out; 725 } 726 727 do { 728 usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100); 729 val = edt_ft5x06_register_read(tsdata, 0x08); 730 if (val < 1) 731 break; 732 } while (--retries > 0); 733 734 if (val < 0) { 735 error = val; 736 dev_dbg(&client->dev, 737 "failed to read 0x08 register, error %d\n", error); 738 goto out; 739 } 740 741 if (retries == 0) { 742 dev_dbg(&client->dev, 743 "timed out waiting for register to settle\n"); 744 error = -ETIMEDOUT; 745 goto out; 746 } 747 748 rdbuf = tsdata->raw_buffer; 749 colbytes = tsdata->num_y * sizeof(u16); 750 751 wrbuf[0] = 0xf5; 752 wrbuf[1] = 0x0e; 753 for (i = 0; i < tsdata->num_x; i++) { 754 wrbuf[2] = i; /* column index */ 755 error = edt_ft5x06_ts_readwrite(tsdata->client, 756 sizeof(wrbuf), wrbuf, 757 colbytes, rdbuf); 758 if (error) 759 goto out; 760 761 rdbuf += colbytes; 762 } 763 764 read = min_t(size_t, count, tsdata->raw_bufsize - *off); 765 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) { 766 error = -EFAULT; 767 goto out; 768 } 769 770 *off += read; 771 out: 772 mutex_unlock(&tsdata->mutex); 773 return error ?: read; 774 }; 775 776 static const struct file_operations debugfs_raw_data_fops = { 777 .open = simple_open, 778 .read = edt_ft5x06_debugfs_raw_data_read, 779 }; 780 781 static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, 782 const char *debugfs_name) 783 { 784 tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL); 785 786 debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x); 787 debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y); 788 789 debugfs_create_file("mode", S_IRUSR | S_IWUSR, 790 tsdata->debug_dir, tsdata, &debugfs_mode_fops); 791 debugfs_create_file("raw_data", S_IRUSR, 792 tsdata->debug_dir, tsdata, &debugfs_raw_data_fops); 793 } 794 795 static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) 796 { 797 debugfs_remove_recursive(tsdata->debug_dir); 798 kfree(tsdata->raw_buffer); 799 } 800 801 #else 802 803 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) 804 { 805 return -ENOSYS; 806 } 807 808 static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, 809 const char *debugfs_name) 810 { 811 } 812 813 static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) 814 { 815 } 816 817 #endif /* CONFIG_DEBUGFS */ 818 819 static int edt_ft5x06_ts_identify(struct i2c_client *client, 820 struct edt_ft5x06_ts_data *tsdata, 821 char *fw_version) 822 { 823 u8 rdbuf[EDT_NAME_LEN]; 824 char *p; 825 int error; 826 char *model_name = tsdata->name; 827 828 /* see what we find if we assume it is a M06 * 829 * if we get less than EDT_NAME_LEN, we don't want 830 * to have garbage in there 831 */ 832 memset(rdbuf, 0, sizeof(rdbuf)); 833 error = edt_ft5x06_ts_readwrite(client, 1, "\xBB", 834 EDT_NAME_LEN - 1, rdbuf); 835 if (error) 836 return error; 837 838 /* Probe content for something consistent. 839 * M06 starts with a response byte, M12 gives the data directly. 840 * M09/Generic does not provide model number information. 841 */ 842 if (!strncasecmp(rdbuf + 1, "EP0", 3)) { 843 tsdata->version = EDT_M06; 844 845 /* remove last '$' end marker */ 846 rdbuf[EDT_NAME_LEN - 1] = '\0'; 847 if (rdbuf[EDT_NAME_LEN - 2] == '$') 848 rdbuf[EDT_NAME_LEN - 2] = '\0'; 849 850 /* look for Model/Version separator */ 851 p = strchr(rdbuf, '*'); 852 if (p) 853 *p++ = '\0'; 854 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN); 855 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); 856 } else if (!strncasecmp(rdbuf, "EP0", 3)) { 857 tsdata->version = EDT_M12; 858 859 /* remove last '$' end marker */ 860 rdbuf[EDT_NAME_LEN - 2] = '\0'; 861 if (rdbuf[EDT_NAME_LEN - 3] == '$') 862 rdbuf[EDT_NAME_LEN - 3] = '\0'; 863 864 /* look for Model/Version separator */ 865 p = strchr(rdbuf, '*'); 866 if (p) 867 *p++ = '\0'; 868 strlcpy(model_name, rdbuf, EDT_NAME_LEN); 869 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); 870 } else { 871 /* If it is not an EDT M06/M12 touchscreen, then the model 872 * detection is a bit hairy. The different ft5x06 873 * firmares around don't reliably implement the 874 * identification registers. Well, we'll take a shot. 875 * 876 * The main difference between generic focaltec based 877 * touches and EDT M09 is that we know how to retrieve 878 * the max coordinates for the latter. 879 */ 880 tsdata->version = GENERIC_FT; 881 882 error = edt_ft5x06_ts_readwrite(client, 1, "\xA6", 883 2, rdbuf); 884 if (error) 885 return error; 886 887 strlcpy(fw_version, rdbuf, 2); 888 889 error = edt_ft5x06_ts_readwrite(client, 1, "\xA8", 890 1, rdbuf); 891 if (error) 892 return error; 893 894 /* This "model identification" is not exact. Unfortunately 895 * not all firmwares for the ft5x06 put useful values in 896 * the identification registers. 897 */ 898 switch (rdbuf[0]) { 899 case 0x35: /* EDT EP0350M09 */ 900 case 0x43: /* EDT EP0430M09 */ 901 case 0x50: /* EDT EP0500M09 */ 902 case 0x57: /* EDT EP0570M09 */ 903 case 0x70: /* EDT EP0700M09 */ 904 tsdata->version = EDT_M09; 905 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09", 906 rdbuf[0] >> 4, rdbuf[0] & 0x0F); 907 break; 908 case 0xa1: /* EDT EP1010ML00 */ 909 tsdata->version = EDT_M09; 910 snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00", 911 rdbuf[0] >> 4, rdbuf[0] & 0x0F); 912 break; 913 case 0x5a: /* Solomon Goldentek Display */ 914 snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0"); 915 break; 916 case 0x59: /* Evervision Display with FT5xx6 TS */ 917 tsdata->version = EV_FT; 918 error = edt_ft5x06_ts_readwrite(client, 1, "\x53", 919 1, rdbuf); 920 if (error) 921 return error; 922 strlcpy(fw_version, rdbuf, 1); 923 snprintf(model_name, EDT_NAME_LEN, 924 "EVERVISION-FT5726NEi"); 925 break; 926 default: 927 snprintf(model_name, EDT_NAME_LEN, 928 "generic ft5x06 (%02x)", 929 rdbuf[0]); 930 break; 931 } 932 } 933 934 return 0; 935 } 936 937 static void edt_ft5x06_ts_get_defaults(struct device *dev, 938 struct edt_ft5x06_ts_data *tsdata) 939 { 940 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 941 u32 val; 942 int error; 943 944 error = device_property_read_u32(dev, "threshold", &val); 945 if (!error) { 946 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, val); 947 tsdata->threshold = val; 948 } 949 950 error = device_property_read_u32(dev, "gain", &val); 951 if (!error) { 952 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, val); 953 tsdata->gain = val; 954 } 955 956 error = device_property_read_u32(dev, "offset", &val); 957 if (!error) { 958 if (reg_addr->reg_offset != NO_REGISTER) 959 edt_ft5x06_register_write(tsdata, 960 reg_addr->reg_offset, val); 961 tsdata->offset = val; 962 } 963 964 error = device_property_read_u32(dev, "offset-x", &val); 965 if (!error) { 966 if (reg_addr->reg_offset_x != NO_REGISTER) 967 edt_ft5x06_register_write(tsdata, 968 reg_addr->reg_offset_x, val); 969 tsdata->offset_x = val; 970 } 971 972 error = device_property_read_u32(dev, "offset-y", &val); 973 if (!error) { 974 if (reg_addr->reg_offset_y != NO_REGISTER) 975 edt_ft5x06_register_write(tsdata, 976 reg_addr->reg_offset_y, val); 977 tsdata->offset_y = val; 978 } 979 } 980 981 static void 982 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata) 983 { 984 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 985 986 tsdata->threshold = edt_ft5x06_register_read(tsdata, 987 reg_addr->reg_threshold); 988 tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain); 989 if (reg_addr->reg_offset != NO_REGISTER) 990 tsdata->offset = 991 edt_ft5x06_register_read(tsdata, reg_addr->reg_offset); 992 if (reg_addr->reg_offset_x != NO_REGISTER) 993 tsdata->offset_x = edt_ft5x06_register_read(tsdata, 994 reg_addr->reg_offset_x); 995 if (reg_addr->reg_offset_y != NO_REGISTER) 996 tsdata->offset_y = edt_ft5x06_register_read(tsdata, 997 reg_addr->reg_offset_y); 998 if (reg_addr->reg_report_rate != NO_REGISTER) 999 tsdata->report_rate = edt_ft5x06_register_read(tsdata, 1000 reg_addr->reg_report_rate); 1001 if (tsdata->version == EDT_M06 || 1002 tsdata->version == EDT_M09 || 1003 tsdata->version == EDT_M12) { 1004 tsdata->num_x = edt_ft5x06_register_read(tsdata, 1005 reg_addr->reg_num_x); 1006 tsdata->num_y = edt_ft5x06_register_read(tsdata, 1007 reg_addr->reg_num_y); 1008 } else { 1009 tsdata->num_x = -1; 1010 tsdata->num_y = -1; 1011 } 1012 } 1013 1014 static void 1015 edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) 1016 { 1017 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 1018 1019 switch (tsdata->version) { 1020 case EDT_M06: 1021 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD; 1022 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE; 1023 reg_addr->reg_gain = WORK_REGISTER_GAIN; 1024 reg_addr->reg_offset = WORK_REGISTER_OFFSET; 1025 reg_addr->reg_offset_x = NO_REGISTER; 1026 reg_addr->reg_offset_y = NO_REGISTER; 1027 reg_addr->reg_num_x = WORK_REGISTER_NUM_X; 1028 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y; 1029 break; 1030 1031 case EDT_M09: 1032 case EDT_M12: 1033 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; 1034 reg_addr->reg_report_rate = NO_REGISTER; 1035 reg_addr->reg_gain = M09_REGISTER_GAIN; 1036 reg_addr->reg_offset = M09_REGISTER_OFFSET; 1037 reg_addr->reg_offset_x = NO_REGISTER; 1038 reg_addr->reg_offset_y = NO_REGISTER; 1039 reg_addr->reg_num_x = M09_REGISTER_NUM_X; 1040 reg_addr->reg_num_y = M09_REGISTER_NUM_Y; 1041 break; 1042 1043 case EV_FT: 1044 reg_addr->reg_threshold = EV_REGISTER_THRESHOLD; 1045 reg_addr->reg_gain = EV_REGISTER_GAIN; 1046 reg_addr->reg_offset = NO_REGISTER; 1047 reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X; 1048 reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y; 1049 reg_addr->reg_num_x = NO_REGISTER; 1050 reg_addr->reg_num_y = NO_REGISTER; 1051 reg_addr->reg_report_rate = NO_REGISTER; 1052 break; 1053 1054 case GENERIC_FT: 1055 /* this is a guesswork */ 1056 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; 1057 reg_addr->reg_gain = M09_REGISTER_GAIN; 1058 reg_addr->reg_offset = M09_REGISTER_OFFSET; 1059 reg_addr->reg_offset_x = NO_REGISTER; 1060 reg_addr->reg_offset_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 if (tsdata->version == EDT_M06 || 1200 tsdata->version == EDT_M09 || 1201 tsdata->version == EDT_M12) { 1202 input_set_abs_params(input, ABS_MT_POSITION_X, 1203 0, tsdata->num_x * 64 - 1, 0, 0); 1204 input_set_abs_params(input, ABS_MT_POSITION_Y, 1205 0, tsdata->num_y * 64 - 1, 0, 0); 1206 } else { 1207 /* Unknown maximum values. Specify via devicetree */ 1208 input_set_abs_params(input, ABS_MT_POSITION_X, 1209 0, 65535, 0, 0); 1210 input_set_abs_params(input, ABS_MT_POSITION_Y, 1211 0, 65535, 0, 0); 1212 } 1213 1214 touchscreen_parse_properties(input, true, &tsdata->prop); 1215 1216 error = input_mt_init_slots(input, tsdata->max_support_points, 1217 INPUT_MT_DIRECT); 1218 if (error) { 1219 dev_err(&client->dev, "Unable to init MT slots.\n"); 1220 return error; 1221 } 1222 1223 i2c_set_clientdata(client, tsdata); 1224 1225 irq_flags = irq_get_trigger_type(client->irq); 1226 if (irq_flags == IRQF_TRIGGER_NONE) 1227 irq_flags = IRQF_TRIGGER_FALLING; 1228 irq_flags |= IRQF_ONESHOT; 1229 1230 error = devm_request_threaded_irq(&client->dev, client->irq, 1231 NULL, edt_ft5x06_ts_isr, irq_flags, 1232 client->name, tsdata); 1233 if (error) { 1234 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); 1235 return error; 1236 } 1237 1238 error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group); 1239 if (error) 1240 return error; 1241 1242 error = input_register_device(input); 1243 if (error) 1244 return error; 1245 1246 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev)); 1247 1248 dev_dbg(&client->dev, 1249 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", 1250 client->irq, 1251 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1, 1252 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1); 1253 1254 return 0; 1255 } 1256 1257 static int edt_ft5x06_ts_remove(struct i2c_client *client) 1258 { 1259 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1260 1261 edt_ft5x06_ts_teardown_debugfs(tsdata); 1262 1263 return 0; 1264 } 1265 1266 static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev) 1267 { 1268 struct i2c_client *client = to_i2c_client(dev); 1269 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1270 struct gpio_desc *reset_gpio = tsdata->reset_gpio; 1271 int ret; 1272 1273 if (device_may_wakeup(dev)) 1274 return 0; 1275 1276 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) 1277 return 0; 1278 1279 /* Enter hibernate mode. */ 1280 ret = edt_ft5x06_register_write(tsdata, PMOD_REGISTER_OPMODE, 1281 PMOD_REGISTER_HIBERNATE); 1282 if (ret) 1283 dev_warn(dev, "Failed to set hibernate mode\n"); 1284 1285 if (tsdata->suspend_mode == EDT_PMODE_HIBERNATE) 1286 return 0; 1287 1288 /* 1289 * Power-off according the datasheet. Cut the power may leaf the irq 1290 * line in an undefined state depending on the host pull resistor 1291 * settings. Disable the irq to avoid adjusting each host till the 1292 * device is back in a full functional state. 1293 */ 1294 disable_irq(tsdata->client->irq); 1295 1296 gpiod_set_value_cansleep(reset_gpio, 1); 1297 usleep_range(1000, 2000); 1298 1299 ret = regulator_disable(tsdata->vcc); 1300 if (ret) 1301 dev_warn(dev, "Failed to disable vcc\n"); 1302 1303 return 0; 1304 } 1305 1306 static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev) 1307 { 1308 struct i2c_client *client = to_i2c_client(dev); 1309 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1310 int ret = 0; 1311 1312 if (device_may_wakeup(dev)) 1313 return 0; 1314 1315 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) 1316 return 0; 1317 1318 if (tsdata->suspend_mode == EDT_PMODE_POWEROFF) { 1319 struct gpio_desc *reset_gpio = tsdata->reset_gpio; 1320 1321 /* 1322 * We can't check if the regulator is a dummy or a real 1323 * regulator. So we need to specify the 5ms reset time (T_rst) 1324 * here instead of the 100us T_rtp time. We also need to wait 1325 * 300ms in case it was a real supply and the power was cutted 1326 * of. Toggle the reset pin is also a way to exit the hibernate 1327 * mode. 1328 */ 1329 gpiod_set_value_cansleep(reset_gpio, 1); 1330 usleep_range(5000, 6000); 1331 1332 ret = regulator_enable(tsdata->vcc); 1333 if (ret) { 1334 dev_err(dev, "Failed to enable vcc\n"); 1335 return ret; 1336 } 1337 1338 usleep_range(1000, 2000); 1339 gpiod_set_value_cansleep(reset_gpio, 0); 1340 msleep(300); 1341 1342 edt_ft5x06_restore_reg_parameters(tsdata); 1343 enable_irq(tsdata->client->irq); 1344 1345 if (tsdata->factory_mode) 1346 ret = edt_ft5x06_factory_mode(tsdata); 1347 } else { 1348 struct gpio_desc *wake_gpio = tsdata->wake_gpio; 1349 1350 gpiod_set_value_cansleep(wake_gpio, 0); 1351 usleep_range(5000, 6000); 1352 gpiod_set_value_cansleep(wake_gpio, 1); 1353 } 1354 1355 1356 return ret; 1357 } 1358 1359 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, 1360 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); 1361 1362 static const struct edt_i2c_chip_data edt_ft5x06_data = { 1363 .max_support_points = 5, 1364 }; 1365 1366 static const struct edt_i2c_chip_data edt_ft5506_data = { 1367 .max_support_points = 10, 1368 }; 1369 1370 static const struct edt_i2c_chip_data edt_ft6236_data = { 1371 .max_support_points = 2, 1372 }; 1373 1374 static const struct i2c_device_id edt_ft5x06_ts_id[] = { 1375 { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data }, 1376 { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data }, 1377 { .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data }, 1378 /* Note no edt- prefix for compatibility with the ft6236.c driver */ 1379 { .name = "ft6236", .driver_data = (long)&edt_ft6236_data }, 1380 { /* sentinel */ } 1381 }; 1382 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); 1383 1384 static const struct of_device_id edt_ft5x06_of_match[] = { 1385 { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data }, 1386 { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data }, 1387 { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data }, 1388 { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data }, 1389 { .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data }, 1390 /* Note focaltech vendor prefix for compatibility with ft6236.c */ 1391 { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data }, 1392 { /* sentinel */ } 1393 }; 1394 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match); 1395 1396 static struct i2c_driver edt_ft5x06_ts_driver = { 1397 .driver = { 1398 .name = "edt_ft5x06", 1399 .of_match_table = edt_ft5x06_of_match, 1400 .pm = &edt_ft5x06_ts_pm_ops, 1401 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1402 }, 1403 .id_table = edt_ft5x06_ts_id, 1404 .probe = edt_ft5x06_ts_probe, 1405 .remove = edt_ft5x06_ts_remove, 1406 }; 1407 1408 module_i2c_driver(edt_ft5x06_ts_driver); 1409 1410 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>"); 1411 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver"); 1412 MODULE_LICENSE("GPL v2"); 1413