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 * Dario Binacchi <dario.binacchi@amarulasolutions.com> (regmap support) 7 */ 8 9 /* 10 * This is a driver for the EDT "Polytouch" family of touch controllers 11 * based on the FocalTech FT5x06 line of chips. 12 * 13 * Development of this driver has been sponsored by Glyn: 14 * http://www.glyn.com/Products/Displays 15 */ 16 17 #include <linux/debugfs.h> 18 #include <linux/delay.h> 19 #include <linux/gpio/consumer.h> 20 #include <linux/i2c.h> 21 #include <linux/interrupt.h> 22 #include <linux/input.h> 23 #include <linux/input/mt.h> 24 #include <linux/input/touchscreen.h> 25 #include <linux/irq.h> 26 #include <linux/kernel.h> 27 #include <linux/module.h> 28 #include <linux/property.h> 29 #include <linux/ratelimit.h> 30 #include <linux/regmap.h> 31 #include <linux/regulator/consumer.h> 32 #include <linux/slab.h> 33 #include <linux/uaccess.h> 34 35 #include <linux/unaligned.h> 36 37 #define WORK_REGISTER_THRESHOLD 0x00 38 #define WORK_REGISTER_REPORT_RATE 0x08 39 #define WORK_REGISTER_GAIN 0x30 40 #define WORK_REGISTER_OFFSET 0x31 41 #define WORK_REGISTER_NUM_X 0x33 42 #define WORK_REGISTER_NUM_Y 0x34 43 44 #define PMOD_REGISTER_ACTIVE 0x00 45 #define PMOD_REGISTER_HIBERNATE 0x03 46 47 #define M09_REGISTER_THRESHOLD 0x80 48 #define M09_REGISTER_GAIN 0x92 49 #define M09_REGISTER_OFFSET 0x93 50 #define M09_REGISTER_NUM_X 0x94 51 #define M09_REGISTER_NUM_Y 0x95 52 53 #define M12_REGISTER_REPORT_RATE 0x88 54 55 #define EV_REGISTER_THRESHOLD 0x40 56 #define EV_REGISTER_GAIN 0x41 57 #define EV_REGISTER_OFFSET_Y 0x45 58 #define EV_REGISTER_OFFSET_X 0x46 59 60 #define NO_REGISTER 0xff 61 62 #define WORK_REGISTER_OPMODE 0x3c 63 #define FACTORY_REGISTER_OPMODE 0x01 64 #define PMOD_REGISTER_OPMODE 0xa5 65 66 #define TOUCH_EVENT_DOWN 0x00 67 #define TOUCH_EVENT_UP 0x01 68 #define TOUCH_EVENT_ON 0x02 69 #define TOUCH_EVENT_RESERVED 0x03 70 71 #define EDT_NAME_LEN 23 72 #define EDT_SWITCH_MODE_RETRIES 10 73 #define EDT_SWITCH_MODE_DELAY 5 /* msec */ 74 #define EDT_RAW_DATA_RETRIES 100 75 #define EDT_RAW_DATA_DELAY 1000 /* usec */ 76 77 #define EDT_DEFAULT_NUM_X 1024 78 #define EDT_DEFAULT_NUM_Y 1024 79 80 #define M06_REG_CMD(factory) ((factory) ? 0xf3 : 0xfc) 81 #define M06_REG_ADDR(factory, addr) ((factory) ? (addr) & 0x7f : (addr) & 0x3f) 82 83 enum edt_pmode { 84 EDT_PMODE_NOT_SUPPORTED, 85 EDT_PMODE_HIBERNATE, 86 EDT_PMODE_POWEROFF, 87 }; 88 89 enum edt_ver { 90 EDT_M06, 91 EDT_M09, 92 EDT_M12, 93 EV_FT, 94 GENERIC_FT, 95 }; 96 97 struct edt_reg_addr { 98 int reg_threshold; 99 int reg_report_rate; 100 int reg_gain; 101 int reg_offset; 102 int reg_offset_x; 103 int reg_offset_y; 104 int reg_num_x; 105 int reg_num_y; 106 }; 107 108 struct edt_ft5x06_ts_data { 109 struct i2c_client *client; 110 struct input_dev *input; 111 struct touchscreen_properties prop; 112 u16 num_x; 113 u16 num_y; 114 struct regulator *vcc; 115 struct regulator *iovcc; 116 117 struct gpio_desc *reset_gpio; 118 struct gpio_desc *wake_gpio; 119 120 struct regmap *regmap; 121 122 #if defined(CONFIG_DEBUG_FS) 123 u8 *raw_buffer; 124 size_t raw_bufsize; 125 #endif 126 127 struct mutex mutex; 128 bool factory_mode; 129 enum edt_pmode suspend_mode; 130 int threshold; 131 int gain; 132 int offset; 133 int offset_x; 134 int offset_y; 135 int report_rate; 136 int max_support_points; 137 int point_len; 138 u8 tdata_cmd; 139 int tdata_len; 140 int tdata_offset; 141 142 char name[EDT_NAME_LEN]; 143 char fw_version[EDT_NAME_LEN]; 144 145 struct edt_reg_addr reg_addr; 146 enum edt_ver version; 147 unsigned int crc_errors; 148 unsigned int header_errors; 149 }; 150 151 struct edt_i2c_chip_data { 152 int max_support_points; 153 }; 154 155 static const struct regmap_config edt_ft5x06_i2c_regmap_config = { 156 .reg_bits = 8, 157 .val_bits = 8, 158 }; 159 160 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata, 161 u8 *buf, int buflen) 162 { 163 int i; 164 u8 crc = 0; 165 166 for (i = 0; i < buflen - 1; i++) 167 crc ^= buf[i]; 168 169 if (crc != buf[buflen - 1]) { 170 tsdata->crc_errors++; 171 dev_err_ratelimited(&tsdata->client->dev, 172 "crc error: 0x%02x expected, got 0x%02x\n", 173 crc, buf[buflen - 1]); 174 return false; 175 } 176 177 return true; 178 } 179 180 static int edt_M06_i2c_read(void *context, const void *reg_buf, size_t reg_size, 181 void *val_buf, size_t val_size) 182 { 183 struct device *dev = context; 184 struct i2c_client *i2c = to_i2c_client(dev); 185 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(i2c); 186 struct i2c_msg xfer[2]; 187 bool reg_read = false; 188 u8 addr; 189 u8 wlen; 190 u8 wbuf[4], rbuf[3]; 191 int ret; 192 193 addr = *((u8 *)reg_buf); 194 wbuf[0] = addr; 195 switch (addr) { 196 case 0xf5: 197 wlen = 3; 198 wbuf[0] = 0xf5; 199 wbuf[1] = 0xe; 200 wbuf[2] = *((u8 *)val_buf); 201 break; 202 case 0xf9: 203 wlen = 1; 204 break; 205 default: 206 wlen = 2; 207 reg_read = true; 208 wbuf[0] = M06_REG_CMD(tsdata->factory_mode); 209 wbuf[1] = M06_REG_ADDR(tsdata->factory_mode, addr); 210 wbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40; 211 } 212 213 xfer[0].addr = i2c->addr; 214 xfer[0].flags = 0; 215 xfer[0].len = wlen; 216 xfer[0].buf = wbuf; 217 218 xfer[1].addr = i2c->addr; 219 xfer[1].flags = I2C_M_RD; 220 xfer[1].len = reg_read ? 2 : val_size; 221 xfer[1].buf = reg_read ? rbuf : val_buf; 222 223 ret = i2c_transfer(i2c->adapter, xfer, 2); 224 if (ret != 2) { 225 if (ret < 0) 226 return ret; 227 228 return -EIO; 229 } 230 231 if (addr == 0xf9) { 232 u8 *buf = (u8 *)val_buf; 233 234 if (buf[0] != 0xaa || buf[1] != 0xaa || 235 buf[2] != val_size) { 236 tsdata->header_errors++; 237 dev_err_ratelimited(dev, 238 "Unexpected header: %02x%02x%02x\n", 239 buf[0], buf[1], buf[2]); 240 return -EIO; 241 } 242 243 if (!edt_ft5x06_ts_check_crc(tsdata, val_buf, val_size)) 244 return -EIO; 245 } else if (reg_read) { 246 wbuf[2] = rbuf[0]; 247 wbuf[3] = rbuf[1]; 248 if (!edt_ft5x06_ts_check_crc(tsdata, wbuf, 4)) 249 return -EIO; 250 251 *((u8 *)val_buf) = rbuf[0]; 252 } 253 254 return 0; 255 } 256 257 static int edt_M06_i2c_write(void *context, const void *data, size_t count) 258 { 259 struct device *dev = context; 260 struct i2c_client *i2c = to_i2c_client(dev); 261 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(i2c); 262 u8 addr, val; 263 u8 wbuf[4]; 264 struct i2c_msg xfer; 265 int ret; 266 267 addr = *((u8 *)data); 268 val = *((u8 *)data + 1); 269 270 wbuf[0] = M06_REG_CMD(tsdata->factory_mode); 271 wbuf[1] = M06_REG_ADDR(tsdata->factory_mode, addr); 272 wbuf[2] = val; 273 wbuf[3] = wbuf[0] ^ wbuf[1] ^ wbuf[2]; 274 275 xfer.addr = i2c->addr; 276 xfer.flags = 0; 277 xfer.len = 4; 278 xfer.buf = wbuf; 279 280 ret = i2c_transfer(i2c->adapter, &xfer, 1); 281 if (ret != 1) { 282 if (ret < 0) 283 return ret; 284 285 return -EIO; 286 } 287 288 return 0; 289 } 290 291 static const struct regmap_config edt_M06_i2c_regmap_config = { 292 .reg_bits = 8, 293 .val_bits = 8, 294 .read = edt_M06_i2c_read, 295 .write = edt_M06_i2c_write, 296 }; 297 298 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) 299 { 300 struct edt_ft5x06_ts_data *tsdata = dev_id; 301 struct device *dev = &tsdata->client->dev; 302 u8 rdbuf[63]; 303 int i, type, x, y, id; 304 int error; 305 306 memset(rdbuf, 0, sizeof(rdbuf)); 307 error = regmap_bulk_read(tsdata->regmap, tsdata->tdata_cmd, rdbuf, 308 tsdata->tdata_len); 309 if (error) { 310 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", 311 error); 312 goto out; 313 } 314 315 for (i = 0; i < tsdata->max_support_points; i++) { 316 u8 *buf = &rdbuf[i * tsdata->point_len + tsdata->tdata_offset]; 317 318 type = buf[0] >> 6; 319 /* ignore Reserved events */ 320 if (type == TOUCH_EVENT_RESERVED) 321 continue; 322 323 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */ 324 if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN) 325 continue; 326 327 x = get_unaligned_be16(buf) & 0x0fff; 328 y = get_unaligned_be16(buf + 2) & 0x0fff; 329 /* The FT5x26 send the y coordinate first */ 330 if (tsdata->version == EV_FT) 331 swap(x, y); 332 333 id = (buf[2] >> 4) & 0x0f; 334 335 input_mt_slot(tsdata->input, id); 336 if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, 337 type != TOUCH_EVENT_UP)) 338 touchscreen_report_pos(tsdata->input, &tsdata->prop, 339 x, y, true); 340 } 341 342 input_mt_report_pointer_emulation(tsdata->input, true); 343 input_sync(tsdata->input); 344 345 out: 346 return IRQ_HANDLED; 347 } 348 349 struct edt_ft5x06_attribute { 350 struct device_attribute dattr; 351 size_t field_offset; 352 u8 limit_low; 353 u8 limit_high; 354 u8 addr_m06; 355 u8 addr_m09; 356 u8 addr_ev; 357 }; 358 359 #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev, \ 360 _limit_low, _limit_high) \ 361 struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \ 362 .dattr = __ATTR(_field, _mode, \ 363 edt_ft5x06_setting_show, \ 364 edt_ft5x06_setting_store), \ 365 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \ 366 .addr_m06 = _addr_m06, \ 367 .addr_m09 = _addr_m09, \ 368 .addr_ev = _addr_ev, \ 369 .limit_low = _limit_low, \ 370 .limit_high = _limit_high, \ 371 } 372 373 static ssize_t edt_ft5x06_setting_show(struct device *dev, 374 struct device_attribute *dattr, 375 char *buf) 376 { 377 struct i2c_client *client = to_i2c_client(dev); 378 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 379 struct edt_ft5x06_attribute *attr = 380 container_of(dattr, struct edt_ft5x06_attribute, dattr); 381 u8 *field = (u8 *)tsdata + attr->field_offset; 382 unsigned int val; 383 size_t count = 0; 384 int error = 0; 385 u8 addr; 386 387 mutex_lock(&tsdata->mutex); 388 389 if (tsdata->factory_mode) { 390 error = -EIO; 391 goto out; 392 } 393 394 switch (tsdata->version) { 395 case EDT_M06: 396 addr = attr->addr_m06; 397 break; 398 399 case EDT_M09: 400 case EDT_M12: 401 case GENERIC_FT: 402 addr = attr->addr_m09; 403 break; 404 405 case EV_FT: 406 addr = attr->addr_ev; 407 break; 408 409 default: 410 error = -ENODEV; 411 goto out; 412 } 413 414 if (addr != NO_REGISTER) { 415 error = regmap_read(tsdata->regmap, addr, &val); 416 if (error) { 417 dev_err(&tsdata->client->dev, 418 "Failed to fetch attribute %s, error %d\n", 419 dattr->attr.name, error); 420 goto out; 421 } 422 } else { 423 val = *field; 424 } 425 426 if (val != *field) { 427 dev_warn(&tsdata->client->dev, 428 "%s: read (%d) and stored value (%d) differ\n", 429 dattr->attr.name, val, *field); 430 *field = val; 431 } 432 433 count = sysfs_emit(buf, "%d\n", val); 434 out: 435 mutex_unlock(&tsdata->mutex); 436 return error ?: count; 437 } 438 439 static ssize_t edt_ft5x06_setting_store(struct device *dev, 440 struct device_attribute *dattr, 441 const char *buf, size_t count) 442 { 443 struct i2c_client *client = to_i2c_client(dev); 444 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 445 struct edt_ft5x06_attribute *attr = 446 container_of(dattr, struct edt_ft5x06_attribute, dattr); 447 u8 *field = (u8 *)tsdata + attr->field_offset; 448 unsigned int val; 449 int error; 450 u8 addr; 451 452 mutex_lock(&tsdata->mutex); 453 454 if (tsdata->factory_mode) { 455 error = -EIO; 456 goto out; 457 } 458 459 error = kstrtouint(buf, 0, &val); 460 if (error) 461 goto out; 462 463 if (val < attr->limit_low || val > attr->limit_high) { 464 error = -ERANGE; 465 goto out; 466 } 467 468 switch (tsdata->version) { 469 case EDT_M06: 470 addr = attr->addr_m06; 471 break; 472 473 case EDT_M09: 474 case EDT_M12: 475 case GENERIC_FT: 476 addr = attr->addr_m09; 477 break; 478 479 case EV_FT: 480 addr = attr->addr_ev; 481 break; 482 483 default: 484 error = -ENODEV; 485 goto out; 486 } 487 488 if (addr != NO_REGISTER) { 489 error = regmap_write(tsdata->regmap, addr, val); 490 if (error) { 491 dev_err(&tsdata->client->dev, 492 "Failed to update attribute %s, error: %d\n", 493 dattr->attr.name, error); 494 goto out; 495 } 496 } 497 *field = val; 498 499 out: 500 mutex_unlock(&tsdata->mutex); 501 return error ?: count; 502 } 503 504 /* m06, m09: range 0-31, m12: range 0-5 */ 505 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 506 M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31); 507 /* m06, m09: range 0-31, m12: range 0-16 */ 508 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 509 M09_REGISTER_OFFSET, NO_REGISTER, 0, 31); 510 /* m06, m09, m12: no supported, ev_ft: range 0-80 */ 511 static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, 512 EV_REGISTER_OFFSET_X, 0, 80); 513 /* m06, m09, m12: no supported, ev_ft: range 0-80 */ 514 static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER, 515 EV_REGISTER_OFFSET_Y, 0, 80); 516 /* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */ 517 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD, 518 M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255); 519 /* m06: range 3 to 14, m12: range 1 to 255 */ 520 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE, 521 M12_REGISTER_REPORT_RATE, NO_REGISTER, 0, 255); 522 523 static ssize_t model_show(struct device *dev, struct device_attribute *attr, 524 char *buf) 525 { 526 struct i2c_client *client = to_i2c_client(dev); 527 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 528 529 return sysfs_emit(buf, "%s\n", tsdata->name); 530 } 531 532 static DEVICE_ATTR_RO(model); 533 534 static ssize_t fw_version_show(struct device *dev, 535 struct device_attribute *attr, char *buf) 536 { 537 struct i2c_client *client = to_i2c_client(dev); 538 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 539 540 return sysfs_emit(buf, "%s\n", tsdata->fw_version); 541 } 542 543 static DEVICE_ATTR_RO(fw_version); 544 545 /* m06 only */ 546 static ssize_t header_errors_show(struct device *dev, 547 struct device_attribute *attr, char *buf) 548 { 549 struct i2c_client *client = to_i2c_client(dev); 550 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 551 552 return sysfs_emit(buf, "%d\n", tsdata->header_errors); 553 } 554 555 static DEVICE_ATTR_RO(header_errors); 556 557 /* m06 only */ 558 static ssize_t crc_errors_show(struct device *dev, 559 struct device_attribute *attr, char *buf) 560 { 561 struct i2c_client *client = to_i2c_client(dev); 562 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 563 564 return sysfs_emit(buf, "%d\n", tsdata->crc_errors); 565 } 566 567 static DEVICE_ATTR_RO(crc_errors); 568 569 static struct attribute *edt_ft5x06_attrs[] = { 570 &edt_ft5x06_attr_gain.dattr.attr, 571 &edt_ft5x06_attr_offset.dattr.attr, 572 &edt_ft5x06_attr_offset_x.dattr.attr, 573 &edt_ft5x06_attr_offset_y.dattr.attr, 574 &edt_ft5x06_attr_threshold.dattr.attr, 575 &edt_ft5x06_attr_report_rate.dattr.attr, 576 &dev_attr_model.attr, 577 &dev_attr_fw_version.attr, 578 &dev_attr_header_errors.attr, 579 &dev_attr_crc_errors.attr, 580 NULL 581 }; 582 ATTRIBUTE_GROUPS(edt_ft5x06); 583 584 static void edt_ft5x06_restore_reg_parameters(struct edt_ft5x06_ts_data *tsdata) 585 { 586 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 587 struct regmap *regmap = tsdata->regmap; 588 589 regmap_write(regmap, reg_addr->reg_threshold, tsdata->threshold); 590 regmap_write(regmap, reg_addr->reg_gain, tsdata->gain); 591 if (reg_addr->reg_offset != NO_REGISTER) 592 regmap_write(regmap, reg_addr->reg_offset, tsdata->offset); 593 if (reg_addr->reg_offset_x != NO_REGISTER) 594 regmap_write(regmap, reg_addr->reg_offset_x, tsdata->offset_x); 595 if (reg_addr->reg_offset_y != NO_REGISTER) 596 regmap_write(regmap, reg_addr->reg_offset_y, tsdata->offset_y); 597 if (reg_addr->reg_report_rate != NO_REGISTER) 598 regmap_write(regmap, reg_addr->reg_report_rate, 599 tsdata->report_rate); 600 } 601 602 #ifdef CONFIG_DEBUG_FS 603 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) 604 { 605 struct i2c_client *client = tsdata->client; 606 int retries = EDT_SWITCH_MODE_RETRIES; 607 unsigned int val; 608 int error; 609 610 if (tsdata->version != EDT_M06) { 611 dev_err(&client->dev, 612 "No factory mode support for non-M06 devices\n"); 613 return -EINVAL; 614 } 615 616 disable_irq(client->irq); 617 618 if (!tsdata->raw_buffer) { 619 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y * 620 sizeof(u16); 621 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL); 622 if (!tsdata->raw_buffer) { 623 error = -ENOMEM; 624 goto err_out; 625 } 626 } 627 628 /* mode register is 0x3c when in the work mode */ 629 error = regmap_write(tsdata->regmap, WORK_REGISTER_OPMODE, 0x03); 630 if (error) { 631 dev_err(&client->dev, 632 "failed to switch to factory mode, error %d\n", error); 633 goto err_out; 634 } 635 636 tsdata->factory_mode = true; 637 do { 638 mdelay(EDT_SWITCH_MODE_DELAY); 639 /* mode register is 0x01 when in factory mode */ 640 error = regmap_read(tsdata->regmap, FACTORY_REGISTER_OPMODE, 641 &val); 642 if (!error && val == 0x03) 643 break; 644 } while (--retries > 0); 645 646 if (retries == 0) { 647 dev_err(&client->dev, "not in factory mode after %dms.\n", 648 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); 649 error = -EIO; 650 goto err_out; 651 } 652 653 return 0; 654 655 err_out: 656 kfree(tsdata->raw_buffer); 657 tsdata->raw_buffer = NULL; 658 tsdata->factory_mode = false; 659 enable_irq(client->irq); 660 661 return error; 662 } 663 664 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata) 665 { 666 struct i2c_client *client = tsdata->client; 667 int retries = EDT_SWITCH_MODE_RETRIES; 668 unsigned int val; 669 int error; 670 671 /* mode register is 0x01 when in the factory mode */ 672 error = regmap_write(tsdata->regmap, FACTORY_REGISTER_OPMODE, 0x1); 673 if (error) { 674 dev_err(&client->dev, 675 "failed to switch to work mode, error: %d\n", error); 676 return error; 677 } 678 679 tsdata->factory_mode = false; 680 681 do { 682 mdelay(EDT_SWITCH_MODE_DELAY); 683 /* mode register is 0x01 when in factory mode */ 684 error = regmap_read(tsdata->regmap, WORK_REGISTER_OPMODE, &val); 685 if (!error && val == 0x01) 686 break; 687 } while (--retries > 0); 688 689 if (retries == 0) { 690 dev_err(&client->dev, "not in work mode after %dms.\n", 691 EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); 692 tsdata->factory_mode = true; 693 return -EIO; 694 } 695 696 kfree(tsdata->raw_buffer); 697 tsdata->raw_buffer = NULL; 698 699 edt_ft5x06_restore_reg_parameters(tsdata); 700 enable_irq(client->irq); 701 702 return 0; 703 } 704 705 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode) 706 { 707 struct edt_ft5x06_ts_data *tsdata = data; 708 709 *mode = tsdata->factory_mode; 710 711 return 0; 712 }; 713 714 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode) 715 { 716 struct edt_ft5x06_ts_data *tsdata = data; 717 int retval = 0; 718 719 if (mode > 1) 720 return -ERANGE; 721 722 mutex_lock(&tsdata->mutex); 723 724 if (mode != tsdata->factory_mode) { 725 retval = mode ? edt_ft5x06_factory_mode(tsdata) : 726 edt_ft5x06_work_mode(tsdata); 727 } 728 729 mutex_unlock(&tsdata->mutex); 730 731 return retval; 732 }; 733 734 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get, 735 edt_ft5x06_debugfs_mode_set, "%llu\n"); 736 737 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file, 738 char __user *buf, size_t count, 739 loff_t *off) 740 { 741 struct edt_ft5x06_ts_data *tsdata = file->private_data; 742 struct i2c_client *client = tsdata->client; 743 int retries = EDT_RAW_DATA_RETRIES; 744 unsigned int val; 745 int i, error; 746 size_t read = 0; 747 int colbytes; 748 u8 *rdbuf; 749 750 if (*off < 0 || *off >= tsdata->raw_bufsize) 751 return 0; 752 753 mutex_lock(&tsdata->mutex); 754 755 if (!tsdata->factory_mode || !tsdata->raw_buffer) { 756 error = -EIO; 757 goto out; 758 } 759 760 error = regmap_write(tsdata->regmap, 0x08, 0x01); 761 if (error) { 762 dev_err(&client->dev, 763 "failed to write 0x08 register, error %d\n", error); 764 goto out; 765 } 766 767 do { 768 usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100); 769 error = regmap_read(tsdata->regmap, 0x08, &val); 770 if (error) { 771 dev_err(&client->dev, 772 "failed to read 0x08 register, error %d\n", 773 error); 774 goto out; 775 } 776 777 if (val == 1) 778 break; 779 } while (--retries > 0); 780 781 if (retries == 0) { 782 dev_err(&client->dev, 783 "timed out waiting for register to settle\n"); 784 error = -ETIMEDOUT; 785 goto out; 786 } 787 788 rdbuf = tsdata->raw_buffer; 789 colbytes = tsdata->num_y * sizeof(u16); 790 791 for (i = 0; i < tsdata->num_x; i++) { 792 rdbuf[0] = i; /* column index */ 793 error = regmap_bulk_read(tsdata->regmap, 0xf5, rdbuf, colbytes); 794 if (error) 795 goto out; 796 797 rdbuf += colbytes; 798 } 799 800 read = min_t(size_t, count, tsdata->raw_bufsize - *off); 801 if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) { 802 error = -EFAULT; 803 goto out; 804 } 805 806 *off += read; 807 out: 808 mutex_unlock(&tsdata->mutex); 809 return error ?: read; 810 }; 811 812 static const struct file_operations debugfs_raw_data_fops = { 813 .open = simple_open, 814 .read = edt_ft5x06_debugfs_raw_data_read, 815 }; 816 817 static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata) 818 { 819 struct dentry *debug_dir = tsdata->client->debugfs; 820 821 debugfs_create_u16("num_x", S_IRUSR, debug_dir, &tsdata->num_x); 822 debugfs_create_u16("num_y", S_IRUSR, debug_dir, &tsdata->num_y); 823 824 debugfs_create_file("mode", S_IRUSR | S_IWUSR, 825 debug_dir, tsdata, &debugfs_mode_fops); 826 debugfs_create_file("raw_data", S_IRUSR, 827 debug_dir, tsdata, &debugfs_raw_data_fops); 828 } 829 830 static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) 831 { 832 kfree(tsdata->raw_buffer); 833 } 834 835 #else 836 837 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) 838 { 839 return -ENOSYS; 840 } 841 842 static void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata) 843 { 844 } 845 846 static void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) 847 { 848 } 849 850 #endif /* CONFIG_DEBUGFS */ 851 852 static int edt_ft5x06_ts_identify(struct i2c_client *client, 853 struct edt_ft5x06_ts_data *tsdata) 854 { 855 u8 rdbuf[EDT_NAME_LEN]; 856 char *p; 857 int error; 858 char *model_name = tsdata->name; 859 char *fw_version = tsdata->fw_version; 860 861 /* see what we find if we assume it is a M06 * 862 * if we get less than EDT_NAME_LEN, we don't want 863 * to have garbage in there 864 */ 865 memset(rdbuf, 0, sizeof(rdbuf)); 866 error = regmap_bulk_read(tsdata->regmap, 0xBB, rdbuf, EDT_NAME_LEN - 1); 867 if (error) 868 return error; 869 870 /* Probe content for something consistent. 871 * M06 starts with a response byte, M12 gives the data directly. 872 * M09/Generic does not provide model number information. 873 */ 874 if (!strncasecmp(rdbuf + 1, "EP0", 3)) { 875 tsdata->version = EDT_M06; 876 877 /* remove last '$' end marker */ 878 rdbuf[EDT_NAME_LEN - 1] = '\0'; 879 if (rdbuf[EDT_NAME_LEN - 2] == '$') 880 rdbuf[EDT_NAME_LEN - 2] = '\0'; 881 882 /* look for Model/Version separator */ 883 p = strchr(rdbuf, '*'); 884 if (p) 885 *p++ = '\0'; 886 strscpy(model_name, rdbuf + 1, EDT_NAME_LEN); 887 strscpy(fw_version, p ? p : "", EDT_NAME_LEN); 888 889 regmap_exit(tsdata->regmap); 890 tsdata->regmap = regmap_init_i2c(client, 891 &edt_M06_i2c_regmap_config); 892 if (IS_ERR(tsdata->regmap)) { 893 dev_err(&client->dev, "regmap allocation failed\n"); 894 return PTR_ERR(tsdata->regmap); 895 } 896 } else if (!strncasecmp(rdbuf, "EP0", 3)) { 897 tsdata->version = EDT_M12; 898 899 /* remove last '$' end marker */ 900 rdbuf[EDT_NAME_LEN - 2] = '\0'; 901 if (rdbuf[EDT_NAME_LEN - 3] == '$') 902 rdbuf[EDT_NAME_LEN - 3] = '\0'; 903 904 /* look for Model/Version separator */ 905 p = strchr(rdbuf, '*'); 906 if (p) 907 *p++ = '\0'; 908 strscpy(model_name, rdbuf, EDT_NAME_LEN); 909 strscpy(fw_version, p ? p : "", EDT_NAME_LEN); 910 } else { 911 /* If it is not an EDT M06/M12 touchscreen, then the model 912 * detection is a bit hairy. The different ft5x06 913 * firmwares around don't reliably implement the 914 * identification registers. Well, we'll take a shot. 915 * 916 * The main difference between generic focaltec based 917 * touches and EDT M09 is that we know how to retrieve 918 * the max coordinates for the latter. 919 */ 920 tsdata->version = GENERIC_FT; 921 922 error = regmap_bulk_read(tsdata->regmap, 0xA6, rdbuf, 2); 923 if (error) 924 return error; 925 926 strscpy(fw_version, rdbuf, 2); 927 928 error = regmap_bulk_read(tsdata->regmap, 0xA8, rdbuf, 1); 929 if (error) 930 return error; 931 932 /* This "model identification" is not exact. Unfortunately 933 * not all firmwares for the ft5x06 put useful values in 934 * the identification registers. 935 */ 936 switch (rdbuf[0]) { 937 case 0x11: /* EDT EP0110M09 */ 938 case 0x35: /* EDT EP0350M09 */ 939 case 0x43: /* EDT EP0430M09 */ 940 case 0x50: /* EDT EP0500M09 */ 941 case 0x57: /* EDT EP0570M09 */ 942 case 0x70: /* EDT EP0700M09 */ 943 tsdata->version = EDT_M09; 944 snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09", 945 rdbuf[0] >> 4, rdbuf[0] & 0x0F); 946 break; 947 case 0xa1: /* EDT EP1010ML00 */ 948 tsdata->version = EDT_M09; 949 snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00", 950 rdbuf[0] >> 4, rdbuf[0] & 0x0F); 951 break; 952 case 0x5a: /* Solomon Goldentek Display */ 953 snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0"); 954 break; 955 case 0x59: /* Evervision Display with FT5xx6 TS */ 956 tsdata->version = EV_FT; 957 error = regmap_bulk_read(tsdata->regmap, 0x53, rdbuf, 1); 958 if (error) 959 return error; 960 strscpy(fw_version, rdbuf, 1); 961 snprintf(model_name, EDT_NAME_LEN, 962 "EVERVISION-FT5726NEi"); 963 break; 964 default: 965 snprintf(model_name, EDT_NAME_LEN, 966 "generic ft5x06 (%02x)", 967 rdbuf[0]); 968 break; 969 } 970 } 971 972 return 0; 973 } 974 975 static void edt_ft5x06_ts_get_defaults(struct device *dev, 976 struct edt_ft5x06_ts_data *tsdata) 977 { 978 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 979 struct regmap *regmap = tsdata->regmap; 980 u32 val; 981 int error; 982 983 error = device_property_read_u32(dev, "threshold", &val); 984 if (!error) { 985 regmap_write(regmap, reg_addr->reg_threshold, val); 986 tsdata->threshold = val; 987 } 988 989 error = device_property_read_u32(dev, "gain", &val); 990 if (!error) { 991 regmap_write(regmap, reg_addr->reg_gain, val); 992 tsdata->gain = val; 993 } 994 995 error = device_property_read_u32(dev, "offset", &val); 996 if (!error) { 997 if (reg_addr->reg_offset != NO_REGISTER) 998 regmap_write(regmap, reg_addr->reg_offset, val); 999 tsdata->offset = val; 1000 } 1001 1002 error = device_property_read_u32(dev, "offset-x", &val); 1003 if (!error) { 1004 if (reg_addr->reg_offset_x != NO_REGISTER) 1005 regmap_write(regmap, reg_addr->reg_offset_x, val); 1006 tsdata->offset_x = val; 1007 } 1008 1009 error = device_property_read_u32(dev, "offset-y", &val); 1010 if (!error) { 1011 if (reg_addr->reg_offset_y != NO_REGISTER) 1012 regmap_write(regmap, reg_addr->reg_offset_y, val); 1013 tsdata->offset_y = val; 1014 } 1015 } 1016 1017 static void edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata) 1018 { 1019 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 1020 struct regmap *regmap = tsdata->regmap; 1021 unsigned int val; 1022 1023 regmap_read(regmap, reg_addr->reg_threshold, &tsdata->threshold); 1024 regmap_read(regmap, reg_addr->reg_gain, &tsdata->gain); 1025 if (reg_addr->reg_offset != NO_REGISTER) 1026 regmap_read(regmap, reg_addr->reg_offset, &tsdata->offset); 1027 if (reg_addr->reg_offset_x != NO_REGISTER) 1028 regmap_read(regmap, reg_addr->reg_offset_x, &tsdata->offset_x); 1029 if (reg_addr->reg_offset_y != NO_REGISTER) 1030 regmap_read(regmap, reg_addr->reg_offset_y, &tsdata->offset_y); 1031 if (reg_addr->reg_report_rate != NO_REGISTER) 1032 regmap_read(regmap, reg_addr->reg_report_rate, 1033 &tsdata->report_rate); 1034 tsdata->num_x = EDT_DEFAULT_NUM_X; 1035 if (reg_addr->reg_num_x != NO_REGISTER) { 1036 if (!regmap_read(regmap, reg_addr->reg_num_x, &val)) 1037 tsdata->num_x = val; 1038 } 1039 tsdata->num_y = EDT_DEFAULT_NUM_Y; 1040 if (reg_addr->reg_num_y != NO_REGISTER) { 1041 if (!regmap_read(regmap, reg_addr->reg_num_y, &val)) 1042 tsdata->num_y = val; 1043 } 1044 } 1045 1046 static void edt_ft5x06_ts_set_tdata_parameters(struct edt_ft5x06_ts_data *tsdata) 1047 { 1048 int crclen; 1049 1050 if (tsdata->version == EDT_M06) { 1051 tsdata->tdata_cmd = 0xf9; 1052 tsdata->tdata_offset = 5; 1053 tsdata->point_len = 4; 1054 crclen = 1; 1055 } else { 1056 tsdata->tdata_cmd = 0x0; 1057 tsdata->tdata_offset = 3; 1058 tsdata->point_len = 6; 1059 crclen = 0; 1060 } 1061 1062 tsdata->tdata_len = tsdata->point_len * tsdata->max_support_points + 1063 tsdata->tdata_offset + crclen; 1064 } 1065 1066 static void edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) 1067 { 1068 struct edt_reg_addr *reg_addr = &tsdata->reg_addr; 1069 1070 switch (tsdata->version) { 1071 case EDT_M06: 1072 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD; 1073 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE; 1074 reg_addr->reg_gain = WORK_REGISTER_GAIN; 1075 reg_addr->reg_offset = WORK_REGISTER_OFFSET; 1076 reg_addr->reg_offset_x = NO_REGISTER; 1077 reg_addr->reg_offset_y = NO_REGISTER; 1078 reg_addr->reg_num_x = WORK_REGISTER_NUM_X; 1079 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y; 1080 break; 1081 1082 case EDT_M09: 1083 case EDT_M12: 1084 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; 1085 reg_addr->reg_report_rate = tsdata->version == EDT_M12 ? 1086 M12_REGISTER_REPORT_RATE : NO_REGISTER; 1087 reg_addr->reg_gain = M09_REGISTER_GAIN; 1088 reg_addr->reg_offset = M09_REGISTER_OFFSET; 1089 reg_addr->reg_offset_x = NO_REGISTER; 1090 reg_addr->reg_offset_y = NO_REGISTER; 1091 reg_addr->reg_num_x = M09_REGISTER_NUM_X; 1092 reg_addr->reg_num_y = M09_REGISTER_NUM_Y; 1093 break; 1094 1095 case EV_FT: 1096 reg_addr->reg_threshold = EV_REGISTER_THRESHOLD; 1097 reg_addr->reg_report_rate = NO_REGISTER; 1098 reg_addr->reg_gain = EV_REGISTER_GAIN; 1099 reg_addr->reg_offset = NO_REGISTER; 1100 reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X; 1101 reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y; 1102 reg_addr->reg_num_x = NO_REGISTER; 1103 reg_addr->reg_num_y = NO_REGISTER; 1104 break; 1105 1106 case GENERIC_FT: 1107 /* this is a guesswork */ 1108 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD; 1109 reg_addr->reg_report_rate = NO_REGISTER; 1110 reg_addr->reg_gain = M09_REGISTER_GAIN; 1111 reg_addr->reg_offset = M09_REGISTER_OFFSET; 1112 reg_addr->reg_offset_x = NO_REGISTER; 1113 reg_addr->reg_offset_y = NO_REGISTER; 1114 reg_addr->reg_num_x = NO_REGISTER; 1115 reg_addr->reg_num_y = NO_REGISTER; 1116 break; 1117 } 1118 } 1119 1120 static void edt_ft5x06_exit_regmap(void *arg) 1121 { 1122 struct edt_ft5x06_ts_data *data = arg; 1123 1124 if (!IS_ERR_OR_NULL(data->regmap)) 1125 regmap_exit(data->regmap); 1126 } 1127 1128 static void edt_ft5x06_disable_regulators(void *arg) 1129 { 1130 struct edt_ft5x06_ts_data *data = arg; 1131 1132 regulator_disable(data->vcc); 1133 regulator_disable(data->iovcc); 1134 } 1135 1136 static int edt_ft5x06_ts_probe(struct i2c_client *client) 1137 { 1138 const struct i2c_device_id *id = i2c_client_get_device_id(client); 1139 const struct edt_i2c_chip_data *chip_data; 1140 struct edt_ft5x06_ts_data *tsdata; 1141 unsigned int val; 1142 struct input_dev *input; 1143 unsigned long irq_flags; 1144 int error; 1145 u32 report_rate; 1146 1147 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); 1148 1149 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL); 1150 if (!tsdata) { 1151 dev_err(&client->dev, "failed to allocate driver data.\n"); 1152 return -ENOMEM; 1153 } 1154 1155 tsdata->regmap = regmap_init_i2c(client, &edt_ft5x06_i2c_regmap_config); 1156 if (IS_ERR(tsdata->regmap)) { 1157 dev_err(&client->dev, "regmap allocation failed\n"); 1158 return PTR_ERR(tsdata->regmap); 1159 } 1160 1161 /* 1162 * We are not using devm_regmap_init_i2c() and instead install a 1163 * custom action because we may replace regmap with M06-specific one 1164 * and we need to make sure that it will not be released too early. 1165 */ 1166 error = devm_add_action_or_reset(&client->dev, edt_ft5x06_exit_regmap, 1167 tsdata); 1168 if (error) 1169 return error; 1170 1171 chip_data = device_get_match_data(&client->dev); 1172 if (!chip_data) 1173 chip_data = (const struct edt_i2c_chip_data *)id->driver_data; 1174 if (!chip_data || !chip_data->max_support_points) { 1175 dev_err(&client->dev, "invalid or missing chip data\n"); 1176 return -EINVAL; 1177 } 1178 1179 tsdata->max_support_points = chip_data->max_support_points; 1180 1181 tsdata->vcc = devm_regulator_get(&client->dev, "vcc"); 1182 if (IS_ERR(tsdata->vcc)) 1183 return dev_err_probe(&client->dev, PTR_ERR(tsdata->vcc), 1184 "failed to request regulator\n"); 1185 1186 tsdata->iovcc = devm_regulator_get(&client->dev, "iovcc"); 1187 if (IS_ERR(tsdata->iovcc)) { 1188 error = PTR_ERR(tsdata->iovcc); 1189 if (error != -EPROBE_DEFER) 1190 dev_err(&client->dev, 1191 "failed to request iovcc regulator: %d\n", error); 1192 return error; 1193 } 1194 1195 error = regulator_enable(tsdata->iovcc); 1196 if (error < 0) { 1197 dev_err(&client->dev, "failed to enable iovcc: %d\n", error); 1198 return error; 1199 } 1200 1201 /* Delay enabling VCC for > 10us (T_ivd) after IOVCC */ 1202 usleep_range(10, 100); 1203 1204 error = regulator_enable(tsdata->vcc); 1205 if (error < 0) { 1206 dev_err(&client->dev, "failed to enable vcc: %d\n", error); 1207 regulator_disable(tsdata->iovcc); 1208 return error; 1209 } 1210 1211 error = devm_add_action_or_reset(&client->dev, 1212 edt_ft5x06_disable_regulators, 1213 tsdata); 1214 if (error) 1215 return error; 1216 1217 tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev, 1218 "reset", GPIOD_OUT_HIGH); 1219 if (IS_ERR(tsdata->reset_gpio)) { 1220 error = PTR_ERR(tsdata->reset_gpio); 1221 dev_err(&client->dev, 1222 "Failed to request GPIO reset pin, error %d\n", error); 1223 return error; 1224 } 1225 1226 tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev, 1227 "wake", GPIOD_OUT_LOW); 1228 if (IS_ERR(tsdata->wake_gpio)) { 1229 error = PTR_ERR(tsdata->wake_gpio); 1230 dev_err(&client->dev, 1231 "Failed to request GPIO wake pin, error %d\n", error); 1232 return error; 1233 } 1234 1235 /* 1236 * Check which sleep modes we can support. Power-off requires the 1237 * reset-pin to ensure correct power-down/power-up behaviour. Start with 1238 * the EDT_PMODE_POWEROFF test since this is the deepest possible sleep 1239 * mode. 1240 */ 1241 if (tsdata->reset_gpio) 1242 tsdata->suspend_mode = EDT_PMODE_POWEROFF; 1243 else if (tsdata->wake_gpio) 1244 tsdata->suspend_mode = EDT_PMODE_HIBERNATE; 1245 else 1246 tsdata->suspend_mode = EDT_PMODE_NOT_SUPPORTED; 1247 1248 if (tsdata->wake_gpio) { 1249 usleep_range(5000, 6000); 1250 gpiod_set_value_cansleep(tsdata->wake_gpio, 1); 1251 usleep_range(5000, 6000); 1252 } 1253 1254 if (tsdata->reset_gpio) { 1255 usleep_range(5000, 6000); 1256 gpiod_set_value_cansleep(tsdata->reset_gpio, 0); 1257 msleep(300); 1258 } 1259 1260 input = devm_input_allocate_device(&client->dev); 1261 if (!input) { 1262 dev_err(&client->dev, "failed to allocate input device.\n"); 1263 return -ENOMEM; 1264 } 1265 1266 mutex_init(&tsdata->mutex); 1267 tsdata->client = client; 1268 tsdata->input = input; 1269 tsdata->factory_mode = false; 1270 i2c_set_clientdata(client, tsdata); 1271 1272 error = edt_ft5x06_ts_identify(client, tsdata); 1273 if (error) { 1274 dev_err(&client->dev, "touchscreen probe failed\n"); 1275 return error; 1276 } 1277 1278 /* 1279 * Dummy read access. EP0700MLP1 returns bogus data on the first 1280 * register read access and ignores writes. 1281 */ 1282 regmap_read(tsdata->regmap, 0x00, &val); 1283 1284 edt_ft5x06_ts_set_tdata_parameters(tsdata); 1285 edt_ft5x06_ts_set_regs(tsdata); 1286 edt_ft5x06_ts_get_defaults(&client->dev, tsdata); 1287 edt_ft5x06_ts_get_parameters(tsdata); 1288 1289 if (tsdata->reg_addr.reg_report_rate != NO_REGISTER && 1290 !device_property_read_u32(&client->dev, 1291 "report-rate-hz", &report_rate)) { 1292 if (tsdata->version == EDT_M06) 1293 tsdata->report_rate = clamp_val(report_rate, 30, 140); 1294 else 1295 tsdata->report_rate = clamp_val(report_rate, 1, 255); 1296 1297 if (report_rate != tsdata->report_rate) 1298 dev_warn(&client->dev, 1299 "report-rate %dHz is unsupported, use %dHz\n", 1300 report_rate, tsdata->report_rate); 1301 1302 if (tsdata->version == EDT_M06) 1303 tsdata->report_rate /= 10; 1304 1305 regmap_write(tsdata->regmap, tsdata->reg_addr.reg_report_rate, 1306 tsdata->report_rate); 1307 } 1308 1309 dev_dbg(&client->dev, 1310 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n", 1311 tsdata->name, tsdata->fw_version, tsdata->num_x, tsdata->num_y); 1312 1313 input->name = tsdata->name; 1314 input->id.bustype = BUS_I2C; 1315 input->dev.parent = &client->dev; 1316 1317 input_set_abs_params(input, ABS_MT_POSITION_X, 1318 0, tsdata->num_x * 64 - 1, 0, 0); 1319 input_set_abs_params(input, ABS_MT_POSITION_Y, 1320 0, tsdata->num_y * 64 - 1, 0, 0); 1321 1322 touchscreen_parse_properties(input, true, &tsdata->prop); 1323 1324 error = input_mt_init_slots(input, tsdata->max_support_points, 1325 INPUT_MT_DIRECT); 1326 if (error) { 1327 dev_err(&client->dev, "Unable to init MT slots.\n"); 1328 return error; 1329 } 1330 1331 irq_flags = irq_get_trigger_type(client->irq); 1332 if (irq_flags == IRQF_TRIGGER_NONE) 1333 irq_flags = IRQF_TRIGGER_FALLING; 1334 irq_flags |= IRQF_ONESHOT; 1335 1336 error = devm_request_threaded_irq(&client->dev, client->irq, 1337 NULL, edt_ft5x06_ts_isr, irq_flags, 1338 client->name, tsdata); 1339 if (error) { 1340 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); 1341 return error; 1342 } 1343 1344 error = input_register_device(input); 1345 if (error) 1346 return error; 1347 1348 edt_ft5x06_ts_prepare_debugfs(tsdata); 1349 1350 dev_dbg(&client->dev, 1351 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", 1352 client->irq, 1353 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1, 1354 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1); 1355 1356 return 0; 1357 } 1358 1359 static void edt_ft5x06_ts_remove(struct i2c_client *client) 1360 { 1361 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1362 1363 edt_ft5x06_ts_teardown_debugfs(tsdata); 1364 } 1365 1366 static int edt_ft5x06_ts_suspend(struct device *dev) 1367 { 1368 struct i2c_client *client = to_i2c_client(dev); 1369 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1370 struct gpio_desc *reset_gpio = tsdata->reset_gpio; 1371 int ret; 1372 1373 if (device_may_wakeup(dev)) 1374 return 0; 1375 1376 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) 1377 return 0; 1378 1379 /* Enter hibernate mode. */ 1380 ret = regmap_write(tsdata->regmap, PMOD_REGISTER_OPMODE, 1381 PMOD_REGISTER_HIBERNATE); 1382 if (ret) 1383 dev_warn(dev, "Failed to set hibernate mode\n"); 1384 1385 if (tsdata->suspend_mode == EDT_PMODE_HIBERNATE) 1386 return 0; 1387 1388 /* 1389 * Power-off according the datasheet. Cut the power may leaf the irq 1390 * line in an undefined state depending on the host pull resistor 1391 * settings. Disable the irq to avoid adjusting each host till the 1392 * device is back in a full functional state. 1393 */ 1394 disable_irq(tsdata->client->irq); 1395 1396 gpiod_set_value_cansleep(reset_gpio, 1); 1397 usleep_range(1000, 2000); 1398 1399 ret = regulator_disable(tsdata->vcc); 1400 if (ret) 1401 dev_warn(dev, "Failed to disable vcc\n"); 1402 ret = regulator_disable(tsdata->iovcc); 1403 if (ret) 1404 dev_warn(dev, "Failed to disable iovcc\n"); 1405 1406 return 0; 1407 } 1408 1409 static int edt_ft5x06_ts_resume(struct device *dev) 1410 { 1411 struct i2c_client *client = to_i2c_client(dev); 1412 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); 1413 int ret = 0; 1414 1415 if (device_may_wakeup(dev)) 1416 return 0; 1417 1418 if (tsdata->suspend_mode == EDT_PMODE_NOT_SUPPORTED) 1419 return 0; 1420 1421 if (tsdata->suspend_mode == EDT_PMODE_POWEROFF) { 1422 struct gpio_desc *reset_gpio = tsdata->reset_gpio; 1423 1424 /* 1425 * We can't check if the regulator is a dummy or a real 1426 * regulator. So we need to specify the 5ms reset time (T_rst) 1427 * here instead of the 100us T_rtp time. We also need to wait 1428 * 300ms in case it was a real supply and the power was cutted 1429 * of. Toggle the reset pin is also a way to exit the hibernate 1430 * mode. 1431 */ 1432 gpiod_set_value_cansleep(reset_gpio, 1); 1433 usleep_range(5000, 6000); 1434 1435 ret = regulator_enable(tsdata->iovcc); 1436 if (ret) { 1437 dev_err(dev, "Failed to enable iovcc\n"); 1438 return ret; 1439 } 1440 1441 /* Delay enabling VCC for > 10us (T_ivd) after IOVCC */ 1442 usleep_range(10, 100); 1443 1444 ret = regulator_enable(tsdata->vcc); 1445 if (ret) { 1446 dev_err(dev, "Failed to enable vcc\n"); 1447 regulator_disable(tsdata->iovcc); 1448 return ret; 1449 } 1450 1451 usleep_range(1000, 2000); 1452 gpiod_set_value_cansleep(reset_gpio, 0); 1453 msleep(300); 1454 1455 edt_ft5x06_restore_reg_parameters(tsdata); 1456 enable_irq(tsdata->client->irq); 1457 1458 if (tsdata->factory_mode) 1459 ret = edt_ft5x06_factory_mode(tsdata); 1460 } else { 1461 struct gpio_desc *wake_gpio = tsdata->wake_gpio; 1462 1463 gpiod_set_value_cansleep(wake_gpio, 0); 1464 usleep_range(5000, 6000); 1465 gpiod_set_value_cansleep(wake_gpio, 1); 1466 } 1467 1468 return ret; 1469 } 1470 1471 static DEFINE_SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, 1472 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); 1473 1474 static const struct edt_i2c_chip_data edt_ft5x06_data = { 1475 .max_support_points = 5, 1476 }; 1477 1478 static const struct edt_i2c_chip_data edt_ft5452_data = { 1479 .max_support_points = 5, 1480 }; 1481 1482 static const struct edt_i2c_chip_data edt_ft5506_data = { 1483 .max_support_points = 10, 1484 }; 1485 1486 static const struct edt_i2c_chip_data edt_ft6236_data = { 1487 .max_support_points = 2, 1488 }; 1489 1490 static const struct edt_i2c_chip_data edt_ft8201_data = { 1491 .max_support_points = 10, 1492 }; 1493 1494 static const struct edt_i2c_chip_data edt_ft8716_data = { 1495 .max_support_points = 10, 1496 }; 1497 1498 static const struct edt_i2c_chip_data edt_ft8719_data = { 1499 .max_support_points = 10, 1500 }; 1501 1502 static const struct i2c_device_id edt_ft5x06_ts_id[] = { 1503 { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data }, 1504 { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data }, 1505 { .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data }, 1506 { .name = "ft5452", .driver_data = (long)&edt_ft5452_data }, 1507 /* Note no edt- prefix for compatibility with the ft6236.c driver */ 1508 { .name = "ft6236", .driver_data = (long)&edt_ft6236_data }, 1509 { .name = "ft8201", .driver_data = (long)&edt_ft8201_data }, 1510 { .name = "ft8716", .driver_data = (long)&edt_ft8716_data }, 1511 { .name = "ft8719", .driver_data = (long)&edt_ft8719_data }, 1512 { /* sentinel */ } 1513 }; 1514 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); 1515 1516 static const struct of_device_id edt_ft5x06_of_match[] = { 1517 { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data }, 1518 { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data }, 1519 { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data }, 1520 { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data }, 1521 { .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data }, 1522 { .compatible = "focaltech,ft5426", .data = &edt_ft5506_data }, 1523 { .compatible = "focaltech,ft5452", .data = &edt_ft5452_data }, 1524 /* Note focaltech vendor prefix for compatibility with ft6236.c */ 1525 { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data }, 1526 { .compatible = "focaltech,ft8201", .data = &edt_ft8201_data }, 1527 { .compatible = "focaltech,ft8716", .data = &edt_ft8716_data }, 1528 { .compatible = "focaltech,ft8719", .data = &edt_ft8719_data }, 1529 { /* sentinel */ } 1530 }; 1531 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match); 1532 1533 static struct i2c_driver edt_ft5x06_ts_driver = { 1534 .driver = { 1535 .name = "edt_ft5x06", 1536 .dev_groups = edt_ft5x06_groups, 1537 .of_match_table = edt_ft5x06_of_match, 1538 .pm = pm_sleep_ptr(&edt_ft5x06_ts_pm_ops), 1539 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1540 }, 1541 .id_table = edt_ft5x06_ts_id, 1542 .probe = edt_ft5x06_ts_probe, 1543 .remove = edt_ft5x06_ts_remove, 1544 }; 1545 1546 module_i2c_driver(edt_ft5x06_ts_driver); 1547 1548 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>"); 1549 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver"); 1550 MODULE_LICENSE("GPL v2"); 1551